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1 | /* |
2 | * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters |
3 | * |
4 | * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com> |
5 | * PMC-Sierra Inc |
6 | * |
7 | * Copyright (C) 2008, 2009 PMC Sierra Inc |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 2 of the License, or |
12 | * (at your option) any later version. |
13 | * |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | * GNU General Public License for more details. |
18 | * |
19 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; if not, write to the Free Software |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, |
22 | * USA |
23 | * |
24 | */ |
25 | #include <linux/fs.h> |
26 | #include <linux/init.h> |
27 | #include <linux/types.h> |
28 | #include <linux/errno.h> |
29 | #include <linux/kernel.h> |
30 | #include <linux/ioport.h> |
31 | #include <linux/delay.h> |
32 | #include <linux/pci.h> |
33 | #include <linux/wait.h> |
34 | #include <linux/spinlock.h> |
35 | #include <linux/sched.h> |
36 | #include <linux/interrupt.h> |
37 | #include <linux/blkdev.h> |
38 | #include <linux/firmware.h> |
39 | #include <linux/module.h> |
40 | #include <linux/moduleparam.h> |
41 | #include <linux/hdreg.h> |
42 | #include <linux/io.h> |
43 | #include <linux/slab.h> |
44 | #include <asm/irq.h> |
45 | #include <asm/processor.h> |
46 | #include <linux/libata.h> |
47 | #include <linux/mutex.h> |
48 | #include <scsi/scsi.h> |
49 | #include <scsi/scsi_host.h> |
50 | #include <scsi/scsi_device.h> |
51 | #include <scsi/scsi_tcq.h> |
52 | #include <scsi/scsi_eh.h> |
53 | #include <scsi/scsi_cmnd.h> |
54 | #include <scsi/scsicam.h> |
55 | |
56 | #include "pmcraid.h" |
57 | |
58 | /* |
59 | * Module configuration parameters |
60 | */ |
61 | static unsigned int pmcraid_debug_log; |
62 | static unsigned int pmcraid_disable_aen; |
63 | static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST; |
64 | static unsigned int pmcraid_enable_msix; |
65 | |
66 | /* |
67 | * Data structures to support multiple adapters by the LLD. |
68 | * pmcraid_adapter_count - count of configured adapters |
69 | */ |
70 | static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0); |
71 | |
72 | /* |
73 | * Supporting user-level control interface through IOCTL commands. |
74 | * pmcraid_major - major number to use |
75 | * pmcraid_minor - minor number(s) to use |
76 | */ |
77 | static unsigned int pmcraid_major; |
78 | static struct class *pmcraid_class; |
79 | DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS); |
80 | |
81 | /* |
82 | * Module parameters |
83 | */ |
84 | MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>"); |
85 | MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver"); |
86 | MODULE_LICENSE("GPL"); |
87 | MODULE_VERSION(PMCRAID_DRIVER_VERSION); |
88 | |
89 | module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR)); |
90 | MODULE_PARM_DESC(log_level, |
91 | "Enables firmware error code logging, default :1 high-severity" |
92 | " errors, 2: all errors including high-severity errors," |
93 | " 0: disables logging"); |
94 | |
95 | module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR)); |
96 | MODULE_PARM_DESC(debug, |
97 | "Enable driver verbose message logging. Set 1 to enable." |
98 | "(default: 0)"); |
99 | |
100 | module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR)); |
101 | MODULE_PARM_DESC(disable_aen, |
102 | "Disable driver aen notifications to apps. Set 1 to disable." |
103 | "(default: 0)"); |
104 | |
105 | /* chip specific constants for PMC MaxRAID controllers (same for |
106 | * 0x5220 and 0x8010 |
107 | */ |
108 | static struct pmcraid_chip_details pmcraid_chip_cfg[] = { |
109 | { |
110 | .ioastatus = 0x0, |
111 | .ioarrin = 0x00040, |
112 | .mailbox = 0x7FC30, |
113 | .global_intr_mask = 0x00034, |
114 | .ioa_host_intr = 0x0009C, |
115 | .ioa_host_intr_clr = 0x000A0, |
116 | .ioa_host_msix_intr = 0x7FC40, |
117 | .ioa_host_mask = 0x7FC28, |
118 | .ioa_host_mask_clr = 0x7FC28, |
119 | .host_ioa_intr = 0x00020, |
120 | .host_ioa_intr_clr = 0x00020, |
121 | .transop_timeout = 300 |
122 | } |
123 | }; |
124 | |
125 | /* |
126 | * PCI device ids supported by pmcraid driver |
127 | */ |
128 | static struct pci_device_id pmcraid_pci_table[] = { |
129 | { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID), |
130 | 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0] |
131 | }, |
132 | {} |
133 | }; |
134 | |
135 | MODULE_DEVICE_TABLE(pci, pmcraid_pci_table); |
136 | |
137 | |
138 | |
139 | /** |
140 | * pmcraid_slave_alloc - Prepare for commands to a device |
141 | * @scsi_dev: scsi device struct |
142 | * |
143 | * This function is called by mid-layer prior to sending any command to the new |
144 | * device. Stores resource entry details of the device in scsi_device struct. |
145 | * Queuecommand uses the resource handle and other details to fill up IOARCB |
146 | * while sending commands to the device. |
147 | * |
148 | * Return value: |
149 | * 0 on success / -ENXIO if device does not exist |
150 | */ |
151 | static int pmcraid_slave_alloc(struct scsi_device *scsi_dev) |
152 | { |
153 | struct pmcraid_resource_entry *temp, *res = NULL; |
154 | struct pmcraid_instance *pinstance; |
155 | u8 target, bus, lun; |
156 | unsigned long lock_flags; |
157 | int rc = -ENXIO; |
158 | u16 fw_version; |
159 | |
160 | pinstance = shost_priv(scsi_dev->host); |
161 | |
162 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
163 | |
164 | /* Driver exposes VSET and GSCSI resources only; all other device types |
165 | * are not exposed. Resource list is synchronized using resource lock |
166 | * so any traversal or modifications to the list should be done inside |
167 | * this lock |
168 | */ |
169 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
170 | list_for_each_entry(temp, &pinstance->used_res_q, queue) { |
171 | |
172 | /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */ |
173 | if (RES_IS_VSET(temp->cfg_entry)) { |
174 | if (fw_version <= PMCRAID_FW_VERSION_1) |
175 | target = temp->cfg_entry.unique_flags1; |
176 | else |
177 | target = temp->cfg_entry.array_id & 0xFF; |
178 | |
179 | if (target > PMCRAID_MAX_VSET_TARGETS) |
180 | continue; |
181 | bus = PMCRAID_VSET_BUS_ID; |
182 | lun = 0; |
183 | } else if (RES_IS_GSCSI(temp->cfg_entry)) { |
184 | target = RES_TARGET(temp->cfg_entry.resource_address); |
185 | bus = PMCRAID_PHYS_BUS_ID; |
186 | lun = RES_LUN(temp->cfg_entry.resource_address); |
187 | } else { |
188 | continue; |
189 | } |
190 | |
191 | if (bus == scsi_dev->channel && |
192 | target == scsi_dev->id && |
193 | lun == scsi_dev->lun) { |
194 | res = temp; |
195 | break; |
196 | } |
197 | } |
198 | |
199 | if (res) { |
200 | res->scsi_dev = scsi_dev; |
201 | scsi_dev->hostdata = res; |
202 | res->change_detected = 0; |
203 | atomic_set(&res->read_failures, 0); |
204 | atomic_set(&res->write_failures, 0); |
205 | rc = 0; |
206 | } |
207 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
208 | return rc; |
209 | } |
210 | |
211 | /** |
212 | * pmcraid_slave_configure - Configures a SCSI device |
213 | * @scsi_dev: scsi device struct |
214 | * |
215 | * This function is executed by SCSI mid layer just after a device is first |
216 | * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the |
217 | * timeout value (default 30s) will be over-written to a higher value (60s) |
218 | * and max_sectors value will be over-written to 512. It also sets queue depth |
219 | * to host->cmd_per_lun value |
220 | * |
221 | * Return value: |
222 | * 0 on success |
223 | */ |
224 | static int pmcraid_slave_configure(struct scsi_device *scsi_dev) |
225 | { |
226 | struct pmcraid_resource_entry *res = scsi_dev->hostdata; |
227 | |
228 | if (!res) |
229 | return 0; |
230 | |
231 | /* LLD exposes VSETs and Enclosure devices only */ |
232 | if (RES_IS_GSCSI(res->cfg_entry) && |
233 | scsi_dev->type != TYPE_ENCLOSURE) |
234 | return -ENXIO; |
235 | |
236 | pmcraid_info("configuring %x:%x:%x:%x\n", |
237 | scsi_dev->host->unique_id, |
238 | scsi_dev->channel, |
239 | scsi_dev->id, |
240 | scsi_dev->lun); |
241 | |
242 | if (RES_IS_GSCSI(res->cfg_entry)) { |
243 | scsi_dev->allow_restart = 1; |
244 | } else if (RES_IS_VSET(res->cfg_entry)) { |
245 | scsi_dev->allow_restart = 1; |
246 | blk_queue_rq_timeout(scsi_dev->request_queue, |
247 | PMCRAID_VSET_IO_TIMEOUT); |
248 | blk_queue_max_hw_sectors(scsi_dev->request_queue, |
249 | PMCRAID_VSET_MAX_SECTORS); |
250 | } |
251 | |
252 | if (scsi_dev->tagged_supported && |
253 | (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { |
254 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); |
255 | scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG, |
256 | scsi_dev->host->cmd_per_lun); |
257 | } else { |
258 | scsi_adjust_queue_depth(scsi_dev, 0, |
259 | scsi_dev->host->cmd_per_lun); |
260 | } |
261 | |
262 | return 0; |
263 | } |
264 | |
265 | /** |
266 | * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it |
267 | * |
268 | * @scsi_dev: scsi device struct |
269 | * |
270 | * This is called by mid-layer before removing a device. Pointer assignments |
271 | * done in pmcraid_slave_alloc will be reset to NULL here. |
272 | * |
273 | * Return value |
274 | * none |
275 | */ |
276 | static void pmcraid_slave_destroy(struct scsi_device *scsi_dev) |
277 | { |
278 | struct pmcraid_resource_entry *res; |
279 | |
280 | res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; |
281 | |
282 | if (res) |
283 | res->scsi_dev = NULL; |
284 | |
285 | scsi_dev->hostdata = NULL; |
286 | } |
287 | |
288 | /** |
289 | * pmcraid_change_queue_depth - Change the device's queue depth |
290 | * @scsi_dev: scsi device struct |
291 | * @depth: depth to set |
292 | * @reason: calling context |
293 | * |
294 | * Return value |
295 | * actual depth set |
296 | */ |
297 | static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth, |
298 | int reason) |
299 | { |
300 | if (reason != SCSI_QDEPTH_DEFAULT) |
301 | return -EOPNOTSUPP; |
302 | |
303 | if (depth > PMCRAID_MAX_CMD_PER_LUN) |
304 | depth = PMCRAID_MAX_CMD_PER_LUN; |
305 | |
306 | scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth); |
307 | |
308 | return scsi_dev->queue_depth; |
309 | } |
310 | |
311 | /** |
312 | * pmcraid_change_queue_type - Change the device's queue type |
313 | * @scsi_dev: scsi device struct |
314 | * @tag: type of tags to use |
315 | * |
316 | * Return value: |
317 | * actual queue type set |
318 | */ |
319 | static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag) |
320 | { |
321 | struct pmcraid_resource_entry *res; |
322 | |
323 | res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; |
324 | |
325 | if ((res) && scsi_dev->tagged_supported && |
326 | (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { |
327 | scsi_set_tag_type(scsi_dev, tag); |
328 | |
329 | if (tag) |
330 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); |
331 | else |
332 | scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth); |
333 | } else |
334 | tag = 0; |
335 | |
336 | return tag; |
337 | } |
338 | |
339 | |
340 | /** |
341 | * pmcraid_init_cmdblk - initializes a command block |
342 | * |
343 | * @cmd: pointer to struct pmcraid_cmd to be initialized |
344 | * @index: if >=0 first time initialization; otherwise reinitialization |
345 | * |
346 | * Return Value |
347 | * None |
348 | */ |
349 | void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index) |
350 | { |
351 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); |
352 | dma_addr_t dma_addr = cmd->ioa_cb_bus_addr; |
353 | |
354 | if (index >= 0) { |
355 | /* first time initialization (called from probe) */ |
356 | u32 ioasa_offset = |
357 | offsetof(struct pmcraid_control_block, ioasa); |
358 | |
359 | cmd->index = index; |
360 | ioarcb->response_handle = cpu_to_le32(index << 2); |
361 | ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr); |
362 | ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset); |
363 | ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa)); |
364 | } else { |
365 | /* re-initialization of various lengths, called once command is |
366 | * processed by IOA |
367 | */ |
368 | memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN); |
369 | ioarcb->hrrq_id = 0; |
370 | ioarcb->request_flags0 = 0; |
371 | ioarcb->request_flags1 = 0; |
372 | ioarcb->cmd_timeout = 0; |
373 | ioarcb->ioarcb_bus_addr &= (~0x1FULL); |
374 | ioarcb->ioadl_bus_addr = 0; |
375 | ioarcb->ioadl_length = 0; |
376 | ioarcb->data_transfer_length = 0; |
377 | ioarcb->add_cmd_param_length = 0; |
378 | ioarcb->add_cmd_param_offset = 0; |
379 | cmd->ioa_cb->ioasa.ioasc = 0; |
380 | cmd->ioa_cb->ioasa.residual_data_length = 0; |
381 | cmd->time_left = 0; |
382 | } |
383 | |
384 | cmd->cmd_done = NULL; |
385 | cmd->scsi_cmd = NULL; |
386 | cmd->release = 0; |
387 | cmd->completion_req = 0; |
388 | cmd->sense_buffer = 0; |
389 | cmd->sense_buffer_dma = 0; |
390 | cmd->dma_handle = 0; |
391 | init_timer(&cmd->timer); |
392 | } |
393 | |
394 | /** |
395 | * pmcraid_reinit_cmdblk - reinitialize a command block |
396 | * |
397 | * @cmd: pointer to struct pmcraid_cmd to be reinitialized |
398 | * |
399 | * Return Value |
400 | * None |
401 | */ |
402 | static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd) |
403 | { |
404 | pmcraid_init_cmdblk(cmd, -1); |
405 | } |
406 | |
407 | /** |
408 | * pmcraid_get_free_cmd - get a free cmd block from command block pool |
409 | * @pinstance: adapter instance structure |
410 | * |
411 | * Return Value: |
412 | * returns pointer to cmd block or NULL if no blocks are available |
413 | */ |
414 | static struct pmcraid_cmd *pmcraid_get_free_cmd( |
415 | struct pmcraid_instance *pinstance |
416 | ) |
417 | { |
418 | struct pmcraid_cmd *cmd = NULL; |
419 | unsigned long lock_flags; |
420 | |
421 | /* free cmd block list is protected by free_pool_lock */ |
422 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); |
423 | |
424 | if (!list_empty(&pinstance->free_cmd_pool)) { |
425 | cmd = list_entry(pinstance->free_cmd_pool.next, |
426 | struct pmcraid_cmd, free_list); |
427 | list_del(&cmd->free_list); |
428 | } |
429 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); |
430 | |
431 | /* Initialize the command block before giving it the caller */ |
432 | if (cmd != NULL) |
433 | pmcraid_reinit_cmdblk(cmd); |
434 | return cmd; |
435 | } |
436 | |
437 | /** |
438 | * pmcraid_return_cmd - return a completed command block back into free pool |
439 | * @cmd: pointer to the command block |
440 | * |
441 | * Return Value: |
442 | * nothing |
443 | */ |
444 | void pmcraid_return_cmd(struct pmcraid_cmd *cmd) |
445 | { |
446 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
447 | unsigned long lock_flags; |
448 | |
449 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); |
450 | list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool); |
451 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); |
452 | } |
453 | |
454 | /** |
455 | * pmcraid_read_interrupts - reads IOA interrupts |
456 | * |
457 | * @pinstance: pointer to adapter instance structure |
458 | * |
459 | * Return value |
460 | * interrupts read from IOA |
461 | */ |
462 | static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance) |
463 | { |
464 | return (pinstance->interrupt_mode) ? |
465 | ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) : |
466 | ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
467 | } |
468 | |
469 | /** |
470 | * pmcraid_disable_interrupts - Masks and clears all specified interrupts |
471 | * |
472 | * @pinstance: pointer to per adapter instance structure |
473 | * @intrs: interrupts to disable |
474 | * |
475 | * Return Value |
476 | * None |
477 | */ |
478 | static void pmcraid_disable_interrupts( |
479 | struct pmcraid_instance *pinstance, |
480 | u32 intrs |
481 | ) |
482 | { |
483 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
484 | u32 nmask = gmask | GLOBAL_INTERRUPT_MASK; |
485 | |
486 | iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg); |
487 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); |
488 | ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
489 | |
490 | if (!pinstance->interrupt_mode) { |
491 | iowrite32(intrs, |
492 | pinstance->int_regs.ioa_host_interrupt_mask_reg); |
493 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
494 | } |
495 | } |
496 | |
497 | /** |
498 | * pmcraid_enable_interrupts - Enables specified interrupts |
499 | * |
500 | * @pinstance: pointer to per adapter instance structure |
501 | * @intr: interrupts to enable |
502 | * |
503 | * Return Value |
504 | * None |
505 | */ |
506 | static void pmcraid_enable_interrupts( |
507 | struct pmcraid_instance *pinstance, |
508 | u32 intrs |
509 | ) |
510 | { |
511 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
512 | u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK); |
513 | |
514 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); |
515 | |
516 | if (!pinstance->interrupt_mode) { |
517 | iowrite32(~intrs, |
518 | pinstance->int_regs.ioa_host_interrupt_mask_reg); |
519 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
520 | } |
521 | |
522 | pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n", |
523 | ioread32(pinstance->int_regs.global_interrupt_mask_reg), |
524 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg)); |
525 | } |
526 | |
527 | /** |
528 | * pmcraid_clr_trans_op - clear trans to op interrupt |
529 | * |
530 | * @pinstance: pointer to per adapter instance structure |
531 | * |
532 | * Return Value |
533 | * None |
534 | */ |
535 | static void pmcraid_clr_trans_op( |
536 | struct pmcraid_instance *pinstance |
537 | ) |
538 | { |
539 | unsigned long lock_flags; |
540 | |
541 | if (!pinstance->interrupt_mode) { |
542 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
543 | pinstance->int_regs.ioa_host_interrupt_mask_reg); |
544 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
545 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
546 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
547 | ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg); |
548 | } |
549 | |
550 | if (pinstance->reset_cmd != NULL) { |
551 | del_timer(&pinstance->reset_cmd->timer); |
552 | spin_lock_irqsave( |
553 | pinstance->host->host_lock, lock_flags); |
554 | pinstance->reset_cmd->cmd_done(pinstance->reset_cmd); |
555 | spin_unlock_irqrestore( |
556 | pinstance->host->host_lock, lock_flags); |
557 | } |
558 | } |
559 | |
560 | /** |
561 | * pmcraid_reset_type - Determine the required reset type |
562 | * @pinstance: pointer to adapter instance structure |
563 | * |
564 | * IOA requires hard reset if any of the following conditions is true. |
565 | * 1. If HRRQ valid interrupt is not masked |
566 | * 2. IOA reset alert doorbell is set |
567 | * 3. If there are any error interrupts |
568 | */ |
569 | static void pmcraid_reset_type(struct pmcraid_instance *pinstance) |
570 | { |
571 | u32 mask; |
572 | u32 intrs; |
573 | u32 alerts; |
574 | |
575 | mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
576 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
577 | alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
578 | |
579 | if ((mask & INTRS_HRRQ_VALID) == 0 || |
580 | (alerts & DOORBELL_IOA_RESET_ALERT) || |
581 | (intrs & PMCRAID_ERROR_INTERRUPTS)) { |
582 | pmcraid_info("IOA requires hard reset\n"); |
583 | pinstance->ioa_hard_reset = 1; |
584 | } |
585 | |
586 | /* If unit check is active, trigger the dump */ |
587 | if (intrs & INTRS_IOA_UNIT_CHECK) |
588 | pinstance->ioa_unit_check = 1; |
589 | } |
590 | |
591 | /** |
592 | * pmcraid_bist_done - completion function for PCI BIST |
593 | * @cmd: pointer to reset command |
594 | * Return Value |
595 | * none |
596 | */ |
597 | |
598 | static void pmcraid_ioa_reset(struct pmcraid_cmd *); |
599 | |
600 | static void pmcraid_bist_done(struct pmcraid_cmd *cmd) |
601 | { |
602 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
603 | unsigned long lock_flags; |
604 | int rc; |
605 | u16 pci_reg; |
606 | |
607 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); |
608 | |
609 | /* If PCI config space can't be accessed wait for another two secs */ |
610 | if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) && |
611 | cmd->time_left > 0) { |
612 | pmcraid_info("BIST not complete, waiting another 2 secs\n"); |
613 | cmd->timer.expires = jiffies + cmd->time_left; |
614 | cmd->time_left = 0; |
615 | cmd->timer.data = (unsigned long)cmd; |
616 | cmd->timer.function = |
617 | (void (*)(unsigned long))pmcraid_bist_done; |
618 | add_timer(&cmd->timer); |
619 | } else { |
620 | cmd->time_left = 0; |
621 | pmcraid_info("BIST is complete, proceeding with reset\n"); |
622 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
623 | pmcraid_ioa_reset(cmd); |
624 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
625 | } |
626 | } |
627 | |
628 | /** |
629 | * pmcraid_start_bist - starts BIST |
630 | * @cmd: pointer to reset cmd |
631 | * Return Value |
632 | * none |
633 | */ |
634 | static void pmcraid_start_bist(struct pmcraid_cmd *cmd) |
635 | { |
636 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
637 | u32 doorbells, intrs; |
638 | |
639 | /* proceed with bist and wait for 2 seconds */ |
640 | iowrite32(DOORBELL_IOA_START_BIST, |
641 | pinstance->int_regs.host_ioa_interrupt_reg); |
642 | doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
643 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
644 | pmcraid_info("doorbells after start bist: %x intrs: %x\n", |
645 | doorbells, intrs); |
646 | |
647 | cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); |
648 | cmd->timer.data = (unsigned long)cmd; |
649 | cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); |
650 | cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done; |
651 | add_timer(&cmd->timer); |
652 | } |
653 | |
654 | /** |
655 | * pmcraid_reset_alert_done - completion routine for reset_alert |
656 | * @cmd: pointer to command block used in reset sequence |
657 | * Return value |
658 | * None |
659 | */ |
660 | static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd) |
661 | { |
662 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
663 | u32 status = ioread32(pinstance->ioa_status); |
664 | unsigned long lock_flags; |
665 | |
666 | /* if the critical operation in progress bit is set or the wait times |
667 | * out, invoke reset engine to proceed with hard reset. If there is |
668 | * some more time to wait, restart the timer |
669 | */ |
670 | if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) || |
671 | cmd->time_left <= 0) { |
672 | pmcraid_info("critical op is reset proceeding with reset\n"); |
673 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
674 | pmcraid_ioa_reset(cmd); |
675 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
676 | } else { |
677 | pmcraid_info("critical op is not yet reset waiting again\n"); |
678 | /* restart timer if some more time is available to wait */ |
679 | cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
680 | cmd->timer.data = (unsigned long)cmd; |
681 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
682 | cmd->timer.function = |
683 | (void (*)(unsigned long))pmcraid_reset_alert_done; |
684 | add_timer(&cmd->timer); |
685 | } |
686 | } |
687 | |
688 | /** |
689 | * pmcraid_reset_alert - alerts IOA for a possible reset |
690 | * @cmd : command block to be used for reset sequence. |
691 | * |
692 | * Return Value |
693 | * returns 0 if pci config-space is accessible and RESET_DOORBELL is |
694 | * successfully written to IOA. Returns non-zero in case pci_config_space |
695 | * is not accessible |
696 | */ |
697 | static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32); |
698 | static void pmcraid_reset_alert(struct pmcraid_cmd *cmd) |
699 | { |
700 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
701 | u32 doorbells; |
702 | int rc; |
703 | u16 pci_reg; |
704 | |
705 | /* If we are able to access IOA PCI config space, alert IOA that we are |
706 | * going to reset it soon. This enables IOA to preserv persistent error |
707 | * data if any. In case memory space is not accessible, proceed with |
708 | * BIST or slot_reset |
709 | */ |
710 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); |
711 | if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) { |
712 | |
713 | /* wait for IOA permission i.e until CRITICAL_OPERATION bit is |
714 | * reset IOA doesn't generate any interrupts when CRITICAL |
715 | * OPERATION bit is reset. A timer is started to wait for this |
716 | * bit to be reset. |
717 | */ |
718 | cmd->time_left = PMCRAID_RESET_TIMEOUT; |
719 | cmd->timer.data = (unsigned long)cmd; |
720 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
721 | cmd->timer.function = |
722 | (void (*)(unsigned long))pmcraid_reset_alert_done; |
723 | add_timer(&cmd->timer); |
724 | |
725 | iowrite32(DOORBELL_IOA_RESET_ALERT, |
726 | pinstance->int_regs.host_ioa_interrupt_reg); |
727 | doorbells = |
728 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
729 | pmcraid_info("doorbells after reset alert: %x\n", doorbells); |
730 | } else { |
731 | pmcraid_info("PCI config is not accessible starting BIST\n"); |
732 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; |
733 | pmcraid_start_bist(cmd); |
734 | } |
735 | } |
736 | |
737 | /** |
738 | * pmcraid_timeout_handler - Timeout handler for internally generated ops |
739 | * |
740 | * @cmd : pointer to command structure, that got timedout |
741 | * |
742 | * This function blocks host requests and initiates an adapter reset. |
743 | * |
744 | * Return value: |
745 | * None |
746 | */ |
747 | static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd) |
748 | { |
749 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
750 | unsigned long lock_flags; |
751 | |
752 | dev_info(&pinstance->pdev->dev, |
753 | "Adapter being reset due to cmd(CDB[0] = %x) timeout\n", |
754 | cmd->ioa_cb->ioarcb.cdb[0]); |
755 | |
756 | /* Command timeouts result in hard reset sequence. The command that got |
757 | * timed out may be the one used as part of reset sequence. In this |
758 | * case restart reset sequence using the same command block even if |
759 | * reset is in progress. Otherwise fail this command and get a free |
760 | * command block to restart the reset sequence. |
761 | */ |
762 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
763 | if (!pinstance->ioa_reset_in_progress) { |
764 | pinstance->ioa_reset_attempts = 0; |
765 | cmd = pmcraid_get_free_cmd(pinstance); |
766 | |
767 | /* If we are out of command blocks, just return here itself. |
768 | * Some other command's timeout handler can do the reset job |
769 | */ |
770 | if (cmd == NULL) { |
771 | spin_unlock_irqrestore(pinstance->host->host_lock, |
772 | lock_flags); |
773 | pmcraid_err("no free cmnd block for timeout handler\n"); |
774 | return; |
775 | } |
776 | |
777 | pinstance->reset_cmd = cmd; |
778 | pinstance->ioa_reset_in_progress = 1; |
779 | } else { |
780 | pmcraid_info("reset is already in progress\n"); |
781 | |
782 | if (pinstance->reset_cmd != cmd) { |
783 | /* This command should have been given to IOA, this |
784 | * command will be completed by fail_outstanding_cmds |
785 | * anyway |
786 | */ |
787 | pmcraid_err("cmd is pending but reset in progress\n"); |
788 | } |
789 | |
790 | /* If this command was being used as part of the reset |
791 | * sequence, set cmd_done pointer to pmcraid_ioa_reset. This |
792 | * causes fail_outstanding_commands not to return the command |
793 | * block back to free pool |
794 | */ |
795 | if (cmd == pinstance->reset_cmd) |
796 | cmd->cmd_done = pmcraid_ioa_reset; |
797 | } |
798 | |
799 | /* Notify apps of important IOA bringup/bringdown sequences */ |
800 | if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START && |
801 | pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START) |
802 | pmcraid_notify_ioastate(pinstance, |
803 | PMC_DEVICE_EVENT_RESET_START); |
804 | |
805 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
806 | scsi_block_requests(pinstance->host); |
807 | pmcraid_reset_alert(cmd); |
808 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
809 | } |
810 | |
811 | /** |
812 | * pmcraid_internal_done - completion routine for internally generated cmds |
813 | * |
814 | * @cmd: command that got response from IOA |
815 | * |
816 | * Return Value: |
817 | * none |
818 | */ |
819 | static void pmcraid_internal_done(struct pmcraid_cmd *cmd) |
820 | { |
821 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", |
822 | cmd->ioa_cb->ioarcb.cdb[0], |
823 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
824 | |
825 | /* Some of the internal commands are sent with callers blocking for the |
826 | * response. Same will be indicated as part of cmd->completion_req |
827 | * field. Response path needs to wake up any waiters waiting for cmd |
828 | * completion if this flag is set. |
829 | */ |
830 | if (cmd->completion_req) { |
831 | cmd->completion_req = 0; |
832 | complete(&cmd->wait_for_completion); |
833 | } |
834 | |
835 | /* most of the internal commands are completed by caller itself, so |
836 | * no need to return the command block back to free pool until we are |
837 | * required to do so (e.g once done with initialization). |
838 | */ |
839 | if (cmd->release) { |
840 | cmd->release = 0; |
841 | pmcraid_return_cmd(cmd); |
842 | } |
843 | } |
844 | |
845 | /** |
846 | * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization |
847 | * |
848 | * @cmd: command that got response from IOA |
849 | * |
850 | * This routine is called after driver re-reads configuration table due to a |
851 | * lost CCN. It returns the command block back to free pool and schedules |
852 | * worker thread to add/delete devices into the system. |
853 | * |
854 | * Return Value: |
855 | * none |
856 | */ |
857 | static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd) |
858 | { |
859 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", |
860 | cmd->ioa_cb->ioarcb.cdb[0], |
861 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
862 | |
863 | if (cmd->release) { |
864 | cmd->release = 0; |
865 | pmcraid_return_cmd(cmd); |
866 | } |
867 | pmcraid_info("scheduling worker for config table reinitialization\n"); |
868 | schedule_work(&cmd->drv_inst->worker_q); |
869 | } |
870 | |
871 | /** |
872 | * pmcraid_erp_done - Process completion of SCSI error response from device |
873 | * @cmd: pmcraid_command |
874 | * |
875 | * This function copies the sense buffer into the scsi_cmd struct and completes |
876 | * scsi_cmd by calling scsi_done function. |
877 | * |
878 | * Return value: |
879 | * none |
880 | */ |
881 | static void pmcraid_erp_done(struct pmcraid_cmd *cmd) |
882 | { |
883 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
884 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
885 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
886 | |
887 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) { |
888 | scsi_cmd->result |= (DID_ERROR << 16); |
889 | scmd_printk(KERN_INFO, scsi_cmd, |
890 | "command CDB[0] = %x failed with IOASC: 0x%08X\n", |
891 | cmd->ioa_cb->ioarcb.cdb[0], ioasc); |
892 | } |
893 | |
894 | /* if we had allocated sense buffers for request sense, copy the sense |
895 | * release the buffers |
896 | */ |
897 | if (cmd->sense_buffer != NULL) { |
898 | memcpy(scsi_cmd->sense_buffer, |
899 | cmd->sense_buffer, |
900 | SCSI_SENSE_BUFFERSIZE); |
901 | pci_free_consistent(pinstance->pdev, |
902 | SCSI_SENSE_BUFFERSIZE, |
903 | cmd->sense_buffer, cmd->sense_buffer_dma); |
904 | cmd->sense_buffer = NULL; |
905 | cmd->sense_buffer_dma = 0; |
906 | } |
907 | |
908 | scsi_dma_unmap(scsi_cmd); |
909 | pmcraid_return_cmd(cmd); |
910 | scsi_cmd->scsi_done(scsi_cmd); |
911 | } |
912 | |
913 | /** |
914 | * pmcraid_fire_command - sends an IOA command to adapter |
915 | * |
916 | * This function adds the given block into pending command list |
917 | * and returns without waiting |
918 | * |
919 | * @cmd : command to be sent to the device |
920 | * |
921 | * Return Value |
922 | * None |
923 | */ |
924 | static void _pmcraid_fire_command(struct pmcraid_cmd *cmd) |
925 | { |
926 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
927 | unsigned long lock_flags; |
928 | |
929 | /* Add this command block to pending cmd pool. We do this prior to |
930 | * writting IOARCB to ioarrin because IOA might complete the command |
931 | * by the time we are about to add it to the list. Response handler |
932 | * (isr/tasklet) looks for cmd block in the pending pending list. |
933 | */ |
934 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
935 | list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool); |
936 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); |
937 | atomic_inc(&pinstance->outstanding_cmds); |
938 | |
939 | /* driver writes lower 32-bit value of IOARCB address only */ |
940 | mb(); |
941 | iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr), |
942 | pinstance->ioarrin); |
943 | } |
944 | |
945 | /** |
946 | * pmcraid_send_cmd - fires a command to IOA |
947 | * |
948 | * This function also sets up timeout function, and command completion |
949 | * function |
950 | * |
951 | * @cmd: pointer to the command block to be fired to IOA |
952 | * @cmd_done: command completion function, called once IOA responds |
953 | * @timeout: timeout to wait for this command completion |
954 | * @timeout_func: timeout handler |
955 | * |
956 | * Return value |
957 | * none |
958 | */ |
959 | static void pmcraid_send_cmd( |
960 | struct pmcraid_cmd *cmd, |
961 | void (*cmd_done) (struct pmcraid_cmd *), |
962 | unsigned long timeout, |
963 | void (*timeout_func) (struct pmcraid_cmd *) |
964 | ) |
965 | { |
966 | /* initialize done function */ |
967 | cmd->cmd_done = cmd_done; |
968 | |
969 | if (timeout_func) { |
970 | /* setup timeout handler */ |
971 | cmd->timer.data = (unsigned long)cmd; |
972 | cmd->timer.expires = jiffies + timeout; |
973 | cmd->timer.function = (void (*)(unsigned long))timeout_func; |
974 | add_timer(&cmd->timer); |
975 | } |
976 | |
977 | /* fire the command to IOA */ |
978 | _pmcraid_fire_command(cmd); |
979 | } |
980 | |
981 | /** |
982 | * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command |
983 | * @cmd: pointer to the command block used for sending IOA shutdown command |
984 | * |
985 | * Return value |
986 | * None |
987 | */ |
988 | static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd) |
989 | { |
990 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
991 | unsigned long lock_flags; |
992 | |
993 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
994 | pmcraid_ioa_reset(cmd); |
995 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
996 | } |
997 | |
998 | /** |
999 | * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa |
1000 | * |
1001 | * @cmd: pointer to the command block used as part of reset sequence |
1002 | * |
1003 | * Return Value |
1004 | * None |
1005 | */ |
1006 | static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd) |
1007 | { |
1008 | pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n", |
1009 | cmd->ioa_cb->ioarcb.cdb[0], |
1010 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
1011 | |
1012 | /* Note that commands sent during reset require next command to be sent |
1013 | * to IOA. Hence reinit the done function as well as timeout function |
1014 | */ |
1015 | pmcraid_reinit_cmdblk(cmd); |
1016 | cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD; |
1017 | cmd->ioa_cb->ioarcb.resource_handle = |
1018 | cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
1019 | cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN; |
1020 | cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL; |
1021 | |
1022 | /* fire shutdown command to hardware. */ |
1023 | pmcraid_info("firing normal shutdown command (%d) to IOA\n", |
1024 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle)); |
1025 | |
1026 | pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START); |
1027 | |
1028 | pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done, |
1029 | PMCRAID_SHUTDOWN_TIMEOUT, |
1030 | pmcraid_timeout_handler); |
1031 | } |
1032 | |
1033 | /** |
1034 | * pmcraid_get_fwversion_done - completion function for get_fwversion |
1035 | * |
1036 | * @cmd: pointer to command block used to send INQUIRY command |
1037 | * |
1038 | * Return Value |
1039 | * none |
1040 | */ |
1041 | static void pmcraid_querycfg(struct pmcraid_cmd *); |
1042 | |
1043 | static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd) |
1044 | { |
1045 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1046 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
1047 | unsigned long lock_flags; |
1048 | |
1049 | /* configuration table entry size depends on firmware version. If fw |
1050 | * version is not known, it is not possible to interpret IOA config |
1051 | * table |
1052 | */ |
1053 | if (ioasc) { |
1054 | pmcraid_err("IOA Inquiry failed with %x\n", ioasc); |
1055 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
1056 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
1057 | pmcraid_reset_alert(cmd); |
1058 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
1059 | } else { |
1060 | pmcraid_querycfg(cmd); |
1061 | } |
1062 | } |
1063 | |
1064 | /** |
1065 | * pmcraid_get_fwversion - reads firmware version information |
1066 | * |
1067 | * @cmd: pointer to command block used to send INQUIRY command |
1068 | * |
1069 | * Return Value |
1070 | * none |
1071 | */ |
1072 | static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd) |
1073 | { |
1074 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
1075 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
1076 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1077 | u16 data_size = sizeof(struct pmcraid_inquiry_data); |
1078 | |
1079 | pmcraid_reinit_cmdblk(cmd); |
1080 | ioarcb->request_type = REQ_TYPE_SCSI; |
1081 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
1082 | ioarcb->cdb[0] = INQUIRY; |
1083 | ioarcb->cdb[1] = 1; |
1084 | ioarcb->cdb[2] = 0xD0; |
1085 | ioarcb->cdb[3] = (data_size >> 8) & 0xFF; |
1086 | ioarcb->cdb[4] = data_size & 0xFF; |
1087 | |
1088 | /* Since entire inquiry data it can be part of IOARCB itself |
1089 | */ |
1090 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
1091 | offsetof(struct pmcraid_ioarcb, |
1092 | add_data.u.ioadl[0])); |
1093 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
1094 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
1095 | |
1096 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
1097 | ioarcb->data_transfer_length = cpu_to_le32(data_size); |
1098 | ioadl = &(ioarcb->add_data.u.ioadl[0]); |
1099 | ioadl->flags = IOADL_FLAGS_LAST_DESC; |
1100 | ioadl->address = cpu_to_le64(pinstance->inq_data_baddr); |
1101 | ioadl->data_len = cpu_to_le32(data_size); |
1102 | |
1103 | pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done, |
1104 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler); |
1105 | } |
1106 | |
1107 | /** |
1108 | * pmcraid_identify_hrrq - registers host rrq buffers with IOA |
1109 | * @cmd: pointer to command block to be used for identify hrrq |
1110 | * |
1111 | * Return Value |
1112 | * none |
1113 | */ |
1114 | static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd) |
1115 | { |
1116 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1117 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
1118 | int index = cmd->hrrq_index; |
1119 | __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]); |
1120 | u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD); |
1121 | void (*done_function)(struct pmcraid_cmd *); |
1122 | |
1123 | pmcraid_reinit_cmdblk(cmd); |
1124 | cmd->hrrq_index = index + 1; |
1125 | |
1126 | if (cmd->hrrq_index < pinstance->num_hrrq) { |
1127 | done_function = pmcraid_identify_hrrq; |
1128 | } else { |
1129 | cmd->hrrq_index = 0; |
1130 | done_function = pmcraid_get_fwversion; |
1131 | } |
1132 | |
1133 | /* Initialize ioarcb */ |
1134 | ioarcb->request_type = REQ_TYPE_IOACMD; |
1135 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
1136 | |
1137 | /* initialize the hrrq number where IOA will respond to this command */ |
1138 | ioarcb->hrrq_id = index; |
1139 | ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ; |
1140 | ioarcb->cdb[1] = index; |
1141 | |
1142 | /* IOA expects 64-bit pci address to be written in B.E format |
1143 | * (i.e cdb[2]=MSByte..cdb[9]=LSB. |
1144 | */ |
1145 | pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n", |
1146 | hrrq_addr, ioarcb->ioarcb_bus_addr, index); |
1147 | |
1148 | memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr)); |
1149 | memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size)); |
1150 | |
1151 | /* Subsequent commands require HRRQ identification to be successful. |
1152 | * Note that this gets called even during reset from SCSI mid-layer |
1153 | * or tasklet |
1154 | */ |
1155 | pmcraid_send_cmd(cmd, done_function, |
1156 | PMCRAID_INTERNAL_TIMEOUT, |
1157 | pmcraid_timeout_handler); |
1158 | } |
1159 | |
1160 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd); |
1161 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd); |
1162 | |
1163 | /** |
1164 | * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA |
1165 | * |
1166 | * @cmd: initialized command block pointer |
1167 | * |
1168 | * Return Value |
1169 | * none |
1170 | */ |
1171 | static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd) |
1172 | { |
1173 | if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE) |
1174 | atomic_set(&(cmd->drv_inst->ccn.ignore), 0); |
1175 | else |
1176 | atomic_set(&(cmd->drv_inst->ldn.ignore), 0); |
1177 | |
1178 | pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL); |
1179 | } |
1180 | |
1181 | /** |
1182 | * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA |
1183 | * |
1184 | * @pinstance: pointer to adapter instance structure |
1185 | * @type: HCAM type |
1186 | * |
1187 | * Return Value |
1188 | * pointer to initialized pmcraid_cmd structure or NULL |
1189 | */ |
1190 | static struct pmcraid_cmd *pmcraid_init_hcam |
1191 | ( |
1192 | struct pmcraid_instance *pinstance, |
1193 | u8 type |
1194 | ) |
1195 | { |
1196 | struct pmcraid_cmd *cmd; |
1197 | struct pmcraid_ioarcb *ioarcb; |
1198 | struct pmcraid_ioadl_desc *ioadl; |
1199 | struct pmcraid_hostrcb *hcam; |
1200 | void (*cmd_done) (struct pmcraid_cmd *); |
1201 | dma_addr_t dma; |
1202 | int rcb_size; |
1203 | |
1204 | cmd = pmcraid_get_free_cmd(pinstance); |
1205 | |
1206 | if (!cmd) { |
1207 | pmcraid_err("no free command blocks for hcam\n"); |
1208 | return cmd; |
1209 | } |
1210 | |
1211 | if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) { |
1212 | rcb_size = sizeof(struct pmcraid_hcam_ccn_ext); |
1213 | cmd_done = pmcraid_process_ccn; |
1214 | dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE; |
1215 | hcam = &pinstance->ccn; |
1216 | } else { |
1217 | rcb_size = sizeof(struct pmcraid_hcam_ldn); |
1218 | cmd_done = pmcraid_process_ldn; |
1219 | dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE; |
1220 | hcam = &pinstance->ldn; |
1221 | } |
1222 | |
1223 | /* initialize command pointer used for HCAM registration */ |
1224 | hcam->cmd = cmd; |
1225 | |
1226 | ioarcb = &cmd->ioa_cb->ioarcb; |
1227 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
1228 | offsetof(struct pmcraid_ioarcb, |
1229 | add_data.u.ioadl[0])); |
1230 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
1231 | ioadl = ioarcb->add_data.u.ioadl; |
1232 | |
1233 | /* Initialize ioarcb */ |
1234 | ioarcb->request_type = REQ_TYPE_HCAM; |
1235 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
1236 | ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC; |
1237 | ioarcb->cdb[1] = type; |
1238 | ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF; |
1239 | ioarcb->cdb[8] = (rcb_size) & 0xFF; |
1240 | |
1241 | ioarcb->data_transfer_length = cpu_to_le32(rcb_size); |
1242 | |
1243 | ioadl[0].flags |= IOADL_FLAGS_READ_LAST; |
1244 | ioadl[0].data_len = cpu_to_le32(rcb_size); |
1245 | ioadl[0].address = cpu_to_le32(dma); |
1246 | |
1247 | cmd->cmd_done = cmd_done; |
1248 | return cmd; |
1249 | } |
1250 | |
1251 | /** |
1252 | * pmcraid_send_hcam - Send an HCAM to IOA |
1253 | * @pinstance: ioa config struct |
1254 | * @type: HCAM type |
1255 | * |
1256 | * This function will send a Host Controlled Async command to IOA. |
1257 | * |
1258 | * Return value: |
1259 | * none |
1260 | */ |
1261 | static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type) |
1262 | { |
1263 | struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type); |
1264 | pmcraid_send_hcam_cmd(cmd); |
1265 | } |
1266 | |
1267 | |
1268 | /** |
1269 | * pmcraid_prepare_cancel_cmd - prepares a command block to abort another |
1270 | * |
1271 | * @cmd: pointer to cmd that is used as cancelling command |
1272 | * @cmd_to_cancel: pointer to the command that needs to be cancelled |
1273 | */ |
1274 | static void pmcraid_prepare_cancel_cmd( |
1275 | struct pmcraid_cmd *cmd, |
1276 | struct pmcraid_cmd *cmd_to_cancel |
1277 | ) |
1278 | { |
1279 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
1280 | __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr; |
1281 | |
1282 | /* Get the resource handle to where the command to be aborted has been |
1283 | * sent. |
1284 | */ |
1285 | ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle; |
1286 | ioarcb->request_type = REQ_TYPE_IOACMD; |
1287 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
1288 | ioarcb->cdb[0] = PMCRAID_ABORT_CMD; |
1289 | |
1290 | /* IOARCB address of the command to be cancelled is given in |
1291 | * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in |
1292 | * IOARCB address are not masked. |
1293 | */ |
1294 | ioarcb_addr = cpu_to_be64(ioarcb_addr); |
1295 | memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr)); |
1296 | } |
1297 | |
1298 | /** |
1299 | * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM |
1300 | * |
1301 | * @cmd: command to be used as cancelling command |
1302 | * @type: HCAM type |
1303 | * @cmd_done: op done function for the cancelling command |
1304 | */ |
1305 | static void pmcraid_cancel_hcam( |
1306 | struct pmcraid_cmd *cmd, |
1307 | u8 type, |
1308 | void (*cmd_done) (struct pmcraid_cmd *) |
1309 | ) |
1310 | { |
1311 | struct pmcraid_instance *pinstance; |
1312 | struct pmcraid_hostrcb *hcam; |
1313 | |
1314 | pinstance = cmd->drv_inst; |
1315 | hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ? |
1316 | &pinstance->ldn : &pinstance->ccn; |
1317 | |
1318 | /* prepare for cancelling previous hcam command. If the HCAM is |
1319 | * currently not pending with IOA, we would have hcam->cmd as non-null |
1320 | */ |
1321 | if (hcam->cmd == NULL) |
1322 | return; |
1323 | |
1324 | pmcraid_prepare_cancel_cmd(cmd, hcam->cmd); |
1325 | |
1326 | /* writing to IOARRIN must be protected by host_lock, as mid-layer |
1327 | * schedule queuecommand while we are doing this |
1328 | */ |
1329 | pmcraid_send_cmd(cmd, cmd_done, |
1330 | PMCRAID_INTERNAL_TIMEOUT, |
1331 | pmcraid_timeout_handler); |
1332 | } |
1333 | |
1334 | /** |
1335 | * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA |
1336 | * |
1337 | * @cmd: command block to be used for cancelling the HCAM |
1338 | */ |
1339 | static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd) |
1340 | { |
1341 | pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n", |
1342 | cmd->ioa_cb->ioarcb.cdb[0], |
1343 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
1344 | |
1345 | pmcraid_reinit_cmdblk(cmd); |
1346 | |
1347 | pmcraid_cancel_hcam(cmd, |
1348 | PMCRAID_HCAM_CODE_CONFIG_CHANGE, |
1349 | pmcraid_ioa_shutdown); |
1350 | } |
1351 | |
1352 | /** |
1353 | * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA |
1354 | * |
1355 | * @cmd: command block to be used for cancelling the HCAM |
1356 | */ |
1357 | static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd) |
1358 | { |
1359 | pmcraid_cancel_hcam(cmd, |
1360 | PMCRAID_HCAM_CODE_LOG_DATA, |
1361 | pmcraid_cancel_ccn); |
1362 | } |
1363 | |
1364 | /** |
1365 | * pmcraid_expose_resource - check if the resource can be exposed to OS |
1366 | * |
1367 | * @fw_version: firmware version code |
1368 | * @cfgte: pointer to configuration table entry of the resource |
1369 | * |
1370 | * Return value: |
1371 | * true if resource can be added to midlayer, false(0) otherwise |
1372 | */ |
1373 | static int pmcraid_expose_resource(u16 fw_version, |
1374 | struct pmcraid_config_table_entry *cfgte) |
1375 | { |
1376 | int retval = 0; |
1377 | |
1378 | if (cfgte->resource_type == RES_TYPE_VSET) { |
1379 | if (fw_version <= PMCRAID_FW_VERSION_1) |
1380 | retval = ((cfgte->unique_flags1 & 0x80) == 0); |
1381 | else |
1382 | retval = ((cfgte->unique_flags0 & 0x80) == 0 && |
1383 | (cfgte->unique_flags1 & 0x80) == 0); |
1384 | |
1385 | } else if (cfgte->resource_type == RES_TYPE_GSCSI) |
1386 | retval = (RES_BUS(cfgte->resource_address) != |
1387 | PMCRAID_VIRTUAL_ENCL_BUS_ID); |
1388 | return retval; |
1389 | } |
1390 | |
1391 | /* attributes supported by pmcraid_event_family */ |
1392 | enum { |
1393 | PMCRAID_AEN_ATTR_UNSPEC, |
1394 | PMCRAID_AEN_ATTR_EVENT, |
1395 | __PMCRAID_AEN_ATTR_MAX, |
1396 | }; |
1397 | #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1) |
1398 | |
1399 | /* commands supported by pmcraid_event_family */ |
1400 | enum { |
1401 | PMCRAID_AEN_CMD_UNSPEC, |
1402 | PMCRAID_AEN_CMD_EVENT, |
1403 | __PMCRAID_AEN_CMD_MAX, |
1404 | }; |
1405 | #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1) |
1406 | |
1407 | static struct genl_family pmcraid_event_family = { |
1408 | .id = GENL_ID_GENERATE, |
1409 | .name = "pmcraid", |
1410 | .version = 1, |
1411 | .maxattr = PMCRAID_AEN_ATTR_MAX |
1412 | }; |
1413 | |
1414 | /** |
1415 | * pmcraid_netlink_init - registers pmcraid_event_family |
1416 | * |
1417 | * Return value: |
1418 | * 0 if the pmcraid_event_family is successfully registered |
1419 | * with netlink generic, non-zero otherwise |
1420 | */ |
1421 | static int pmcraid_netlink_init(void) |
1422 | { |
1423 | int result; |
1424 | |
1425 | result = genl_register_family(&pmcraid_event_family); |
1426 | |
1427 | if (result) |
1428 | return result; |
1429 | |
1430 | pmcraid_info("registered NETLINK GENERIC group: %d\n", |
1431 | pmcraid_event_family.id); |
1432 | |
1433 | return result; |
1434 | } |
1435 | |
1436 | /** |
1437 | * pmcraid_netlink_release - unregisters pmcraid_event_family |
1438 | * |
1439 | * Return value: |
1440 | * none |
1441 | */ |
1442 | static void pmcraid_netlink_release(void) |
1443 | { |
1444 | genl_unregister_family(&pmcraid_event_family); |
1445 | } |
1446 | |
1447 | /** |
1448 | * pmcraid_notify_aen - sends event msg to user space application |
1449 | * @pinstance: pointer to adapter instance structure |
1450 | * @type: HCAM type |
1451 | * |
1452 | * Return value: |
1453 | * 0 if success, error value in case of any failure. |
1454 | */ |
1455 | static int pmcraid_notify_aen( |
1456 | struct pmcraid_instance *pinstance, |
1457 | struct pmcraid_aen_msg *aen_msg, |
1458 | u32 data_size |
1459 | ) |
1460 | { |
1461 | struct sk_buff *skb; |
1462 | void *msg_header; |
1463 | u32 total_size, nla_genl_hdr_total_size; |
1464 | int result; |
1465 | |
1466 | aen_msg->hostno = (pinstance->host->unique_id << 16 | |
1467 | MINOR(pinstance->cdev.dev)); |
1468 | aen_msg->length = data_size; |
1469 | |
1470 | data_size += sizeof(*aen_msg); |
1471 | |
1472 | total_size = nla_total_size(data_size); |
1473 | /* Add GENL_HDR to total_size */ |
1474 | nla_genl_hdr_total_size = |
1475 | (total_size + (GENL_HDRLEN + |
1476 | ((struct genl_family *)&pmcraid_event_family)->hdrsize) |
1477 | + NLMSG_HDRLEN); |
1478 | skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC); |
1479 | |
1480 | |
1481 | if (!skb) { |
1482 | pmcraid_err("Failed to allocate aen data SKB of size: %x\n", |
1483 | total_size); |
1484 | return -ENOMEM; |
1485 | } |
1486 | |
1487 | /* add the genetlink message header */ |
1488 | msg_header = genlmsg_put(skb, 0, 0, |
1489 | &pmcraid_event_family, 0, |
1490 | PMCRAID_AEN_CMD_EVENT); |
1491 | if (!msg_header) { |
1492 | pmcraid_err("failed to copy command details\n"); |
1493 | nlmsg_free(skb); |
1494 | return -ENOMEM; |
1495 | } |
1496 | |
1497 | result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg); |
1498 | |
1499 | if (result) { |
1500 | pmcraid_err("failed to copy AEN attribute data\n"); |
1501 | nlmsg_free(skb); |
1502 | return -EINVAL; |
1503 | } |
1504 | |
1505 | /* send genetlink multicast message to notify appplications */ |
1506 | result = genlmsg_end(skb, msg_header); |
1507 | |
1508 | if (result < 0) { |
1509 | pmcraid_err("genlmsg_end failed\n"); |
1510 | nlmsg_free(skb); |
1511 | return result; |
1512 | } |
1513 | |
1514 | result = |
1515 | genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC); |
1516 | |
1517 | /* If there are no listeners, genlmsg_multicast may return non-zero |
1518 | * value. |
1519 | */ |
1520 | if (result) |
1521 | pmcraid_info("error (%x) sending aen event message\n", result); |
1522 | return result; |
1523 | } |
1524 | |
1525 | /** |
1526 | * pmcraid_notify_ccn - notifies about CCN event msg to user space |
1527 | * @pinstance: pointer adapter instance structure |
1528 | * |
1529 | * Return value: |
1530 | * 0 if success, error value in case of any failure |
1531 | */ |
1532 | static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance) |
1533 | { |
1534 | return pmcraid_notify_aen(pinstance, |
1535 | pinstance->ccn.msg, |
1536 | pinstance->ccn.hcam->data_len + |
1537 | sizeof(struct pmcraid_hcam_hdr)); |
1538 | } |
1539 | |
1540 | /** |
1541 | * pmcraid_notify_ldn - notifies about CCN event msg to user space |
1542 | * @pinstance: pointer adapter instance structure |
1543 | * |
1544 | * Return value: |
1545 | * 0 if success, error value in case of any failure |
1546 | */ |
1547 | static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance) |
1548 | { |
1549 | return pmcraid_notify_aen(pinstance, |
1550 | pinstance->ldn.msg, |
1551 | pinstance->ldn.hcam->data_len + |
1552 | sizeof(struct pmcraid_hcam_hdr)); |
1553 | } |
1554 | |
1555 | /** |
1556 | * pmcraid_notify_ioastate - sends IOA state event msg to user space |
1557 | * @pinstance: pointer adapter instance structure |
1558 | * @evt: controller state event to be sent |
1559 | * |
1560 | * Return value: |
1561 | * 0 if success, error value in case of any failure |
1562 | */ |
1563 | static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt) |
1564 | { |
1565 | pinstance->scn.ioa_state = evt; |
1566 | pmcraid_notify_aen(pinstance, |
1567 | &pinstance->scn.msg, |
1568 | sizeof(u32)); |
1569 | } |
1570 | |
1571 | /** |
1572 | * pmcraid_handle_config_change - Handle a config change from the adapter |
1573 | * @pinstance: pointer to per adapter instance structure |
1574 | * |
1575 | * Return value: |
1576 | * none |
1577 | */ |
1578 | |
1579 | static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance) |
1580 | { |
1581 | struct pmcraid_config_table_entry *cfg_entry; |
1582 | struct pmcraid_hcam_ccn *ccn_hcam; |
1583 | struct pmcraid_cmd *cmd; |
1584 | struct pmcraid_cmd *cfgcmd; |
1585 | struct pmcraid_resource_entry *res = NULL; |
1586 | unsigned long lock_flags; |
1587 | unsigned long host_lock_flags; |
1588 | u32 new_entry = 1; |
1589 | u32 hidden_entry = 0; |
1590 | u16 fw_version; |
1591 | int rc; |
1592 | |
1593 | ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam; |
1594 | cfg_entry = &ccn_hcam->cfg_entry; |
1595 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
1596 | |
1597 | pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \ |
1598 | res: %x:%x:%x:%x\n", |
1599 | pinstance->ccn.hcam->ilid, |
1600 | pinstance->ccn.hcam->op_code, |
1601 | ((pinstance->ccn.hcam->timestamp1) | |
1602 | ((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)), |
1603 | pinstance->ccn.hcam->notification_type, |
1604 | pinstance->ccn.hcam->notification_lost, |
1605 | pinstance->ccn.hcam->flags, |
1606 | pinstance->host->unique_id, |
1607 | RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID : |
1608 | (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID : |
1609 | RES_BUS(cfg_entry->resource_address)), |
1610 | RES_IS_VSET(*cfg_entry) ? |
1611 | (fw_version <= PMCRAID_FW_VERSION_1 ? |
1612 | cfg_entry->unique_flags1 : |
1613 | cfg_entry->array_id & 0xFF) : |
1614 | RES_TARGET(cfg_entry->resource_address), |
1615 | RES_LUN(cfg_entry->resource_address)); |
1616 | |
1617 | |
1618 | /* If this HCAM indicates a lost notification, read the config table */ |
1619 | if (pinstance->ccn.hcam->notification_lost) { |
1620 | cfgcmd = pmcraid_get_free_cmd(pinstance); |
1621 | if (cfgcmd) { |
1622 | pmcraid_info("lost CCN, reading config table\b"); |
1623 | pinstance->reinit_cfg_table = 1; |
1624 | pmcraid_querycfg(cfgcmd); |
1625 | } else { |
1626 | pmcraid_err("lost CCN, no free cmd for querycfg\n"); |
1627 | } |
1628 | goto out_notify_apps; |
1629 | } |
1630 | |
1631 | /* If this resource is not going to be added to mid-layer, just notify |
1632 | * applications and return. If this notification is about hiding a VSET |
1633 | * resource, check if it was exposed already. |
1634 | */ |
1635 | if (pinstance->ccn.hcam->notification_type == |
1636 | NOTIFICATION_TYPE_ENTRY_CHANGED && |
1637 | cfg_entry->resource_type == RES_TYPE_VSET) { |
1638 | |
1639 | if (fw_version <= PMCRAID_FW_VERSION_1) |
1640 | hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0; |
1641 | else |
1642 | hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0; |
1643 | |
1644 | } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) { |
1645 | goto out_notify_apps; |
1646 | } |
1647 | |
1648 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
1649 | list_for_each_entry(res, &pinstance->used_res_q, queue) { |
1650 | rc = memcmp(&res->cfg_entry.resource_address, |
1651 | &cfg_entry->resource_address, |
1652 | sizeof(cfg_entry->resource_address)); |
1653 | if (!rc) { |
1654 | new_entry = 0; |
1655 | break; |
1656 | } |
1657 | } |
1658 | |
1659 | if (new_entry) { |
1660 | |
1661 | if (hidden_entry) { |
1662 | spin_unlock_irqrestore(&pinstance->resource_lock, |
1663 | lock_flags); |
1664 | goto out_notify_apps; |
1665 | } |
1666 | |
1667 | /* If there are more number of resources than what driver can |
1668 | * manage, do not notify the applications about the CCN. Just |
1669 | * ignore this notifications and re-register the same HCAM |
1670 | */ |
1671 | if (list_empty(&pinstance->free_res_q)) { |
1672 | spin_unlock_irqrestore(&pinstance->resource_lock, |
1673 | lock_flags); |
1674 | pmcraid_err("too many resources attached\n"); |
1675 | spin_lock_irqsave(pinstance->host->host_lock, |
1676 | host_lock_flags); |
1677 | pmcraid_send_hcam(pinstance, |
1678 | PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
1679 | spin_unlock_irqrestore(pinstance->host->host_lock, |
1680 | host_lock_flags); |
1681 | return; |
1682 | } |
1683 | |
1684 | res = list_entry(pinstance->free_res_q.next, |
1685 | struct pmcraid_resource_entry, queue); |
1686 | |
1687 | list_del(&res->queue); |
1688 | res->scsi_dev = NULL; |
1689 | res->reset_progress = 0; |
1690 | list_add_tail(&res->queue, &pinstance->used_res_q); |
1691 | } |
1692 | |
1693 | memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size); |
1694 | |
1695 | if (pinstance->ccn.hcam->notification_type == |
1696 | NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) { |
1697 | if (res->scsi_dev) { |
1698 | if (fw_version <= PMCRAID_FW_VERSION_1) |
1699 | res->cfg_entry.unique_flags1 &= 0x7F; |
1700 | else |
1701 | res->cfg_entry.array_id &= 0xFF; |
1702 | res->change_detected = RES_CHANGE_DEL; |
1703 | res->cfg_entry.resource_handle = |
1704 | PMCRAID_INVALID_RES_HANDLE; |
1705 | schedule_work(&pinstance->worker_q); |
1706 | } else { |
1707 | /* This may be one of the non-exposed resources */ |
1708 | list_move_tail(&res->queue, &pinstance->free_res_q); |
1709 | } |
1710 | } else if (!res->scsi_dev) { |
1711 | res->change_detected = RES_CHANGE_ADD; |
1712 | schedule_work(&pinstance->worker_q); |
1713 | } |
1714 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
1715 | |
1716 | out_notify_apps: |
1717 | |
1718 | /* Notify configuration changes to registered applications.*/ |
1719 | if (!pmcraid_disable_aen) |
1720 | pmcraid_notify_ccn(pinstance); |
1721 | |
1722 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
1723 | if (cmd) |
1724 | pmcraid_send_hcam_cmd(cmd); |
1725 | } |
1726 | |
1727 | /** |
1728 | * pmcraid_get_error_info - return error string for an ioasc |
1729 | * @ioasc: ioasc code |
1730 | * Return Value |
1731 | * none |
1732 | */ |
1733 | static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc) |
1734 | { |
1735 | int i; |
1736 | for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) { |
1737 | if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc) |
1738 | return &pmcraid_ioasc_error_table[i]; |
1739 | } |
1740 | return NULL; |
1741 | } |
1742 | |
1743 | /** |
1744 | * pmcraid_ioasc_logger - log IOASC information based user-settings |
1745 | * @ioasc: ioasc code |
1746 | * @cmd: pointer to command that resulted in 'ioasc' |
1747 | */ |
1748 | void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd) |
1749 | { |
1750 | struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc); |
1751 | |
1752 | if (error_info == NULL || |
1753 | cmd->drv_inst->current_log_level < error_info->log_level) |
1754 | return; |
1755 | |
1756 | /* log the error string */ |
1757 | pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n", |
1758 | cmd->ioa_cb->ioarcb.cdb[0], |
1759 | cmd->ioa_cb->ioarcb.resource_handle, |
1760 | le32_to_cpu(ioasc), error_info->error_string); |
1761 | } |
1762 | |
1763 | /** |
1764 | * pmcraid_handle_error_log - Handle a config change (error log) from the IOA |
1765 | * |
1766 | * @pinstance: pointer to per adapter instance structure |
1767 | * |
1768 | * Return value: |
1769 | * none |
1770 | */ |
1771 | static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance) |
1772 | { |
1773 | struct pmcraid_hcam_ldn *hcam_ldn; |
1774 | u32 ioasc; |
1775 | |
1776 | hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; |
1777 | |
1778 | pmcraid_info |
1779 | ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n", |
1780 | pinstance->ldn.hcam->ilid, |
1781 | pinstance->ldn.hcam->op_code, |
1782 | pinstance->ldn.hcam->notification_type, |
1783 | pinstance->ldn.hcam->notification_lost, |
1784 | pinstance->ldn.hcam->flags, |
1785 | pinstance->ldn.hcam->overlay_id); |
1786 | |
1787 | /* log only the errors, no need to log informational log entries */ |
1788 | if (pinstance->ldn.hcam->notification_type != |
1789 | NOTIFICATION_TYPE_ERROR_LOG) |
1790 | return; |
1791 | |
1792 | if (pinstance->ldn.hcam->notification_lost == |
1793 | HOSTRCB_NOTIFICATIONS_LOST) |
1794 | dev_info(&pinstance->pdev->dev, "Error notifications lost\n"); |
1795 | |
1796 | ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc); |
1797 | |
1798 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || |
1799 | ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) { |
1800 | dev_info(&pinstance->pdev->dev, |
1801 | "UnitAttention due to IOA Bus Reset\n"); |
1802 | scsi_report_bus_reset( |
1803 | pinstance->host, |
1804 | RES_BUS(hcam_ldn->error_log.fd_ra)); |
1805 | } |
1806 | |
1807 | return; |
1808 | } |
1809 | |
1810 | /** |
1811 | * pmcraid_process_ccn - Op done function for a CCN. |
1812 | * @cmd: pointer to command struct |
1813 | * |
1814 | * This function is the op done function for a configuration |
1815 | * change notification |
1816 | * |
1817 | * Return value: |
1818 | * none |
1819 | */ |
1820 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd) |
1821 | { |
1822 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1823 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
1824 | unsigned long lock_flags; |
1825 | |
1826 | pinstance->ccn.cmd = NULL; |
1827 | pmcraid_return_cmd(cmd); |
1828 | |
1829 | /* If driver initiated IOA reset happened while this hcam was pending |
1830 | * with IOA, or IOA bringdown sequence is in progress, no need to |
1831 | * re-register the hcam |
1832 | */ |
1833 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
1834 | atomic_read(&pinstance->ccn.ignore) == 1) { |
1835 | return; |
1836 | } else if (ioasc) { |
1837 | dev_info(&pinstance->pdev->dev, |
1838 | "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc); |
1839 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
1840 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
1841 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
1842 | } else { |
1843 | pmcraid_handle_config_change(pinstance); |
1844 | } |
1845 | } |
1846 | |
1847 | /** |
1848 | * pmcraid_process_ldn - op done function for an LDN |
1849 | * @cmd: pointer to command block |
1850 | * |
1851 | * Return value |
1852 | * none |
1853 | */ |
1854 | static void pmcraid_initiate_reset(struct pmcraid_instance *); |
1855 | static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd); |
1856 | |
1857 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd) |
1858 | { |
1859 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1860 | struct pmcraid_hcam_ldn *ldn_hcam = |
1861 | (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; |
1862 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
1863 | u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc); |
1864 | unsigned long lock_flags; |
1865 | |
1866 | /* return the command block back to freepool */ |
1867 | pinstance->ldn.cmd = NULL; |
1868 | pmcraid_return_cmd(cmd); |
1869 | |
1870 | /* If driver initiated IOA reset happened while this hcam was pending |
1871 | * with IOA, no need to re-register the hcam as reset engine will do it |
1872 | * once reset sequence is complete |
1873 | */ |
1874 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
1875 | atomic_read(&pinstance->ccn.ignore) == 1) { |
1876 | return; |
1877 | } else if (!ioasc) { |
1878 | pmcraid_handle_error_log(pinstance); |
1879 | if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) { |
1880 | spin_lock_irqsave(pinstance->host->host_lock, |
1881 | lock_flags); |
1882 | pmcraid_initiate_reset(pinstance); |
1883 | spin_unlock_irqrestore(pinstance->host->host_lock, |
1884 | lock_flags); |
1885 | return; |
1886 | } |
1887 | if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) { |
1888 | pinstance->timestamp_error = 1; |
1889 | pmcraid_set_timestamp(cmd); |
1890 | } |
1891 | } else { |
1892 | dev_info(&pinstance->pdev->dev, |
1893 | "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc); |
1894 | } |
1895 | /* send netlink message for HCAM notification if enabled */ |
1896 | if (!pmcraid_disable_aen) |
1897 | pmcraid_notify_ldn(pinstance); |
1898 | |
1899 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
1900 | if (cmd) |
1901 | pmcraid_send_hcam_cmd(cmd); |
1902 | } |
1903 | |
1904 | /** |
1905 | * pmcraid_register_hcams - register HCAMs for CCN and LDN |
1906 | * |
1907 | * @pinstance: pointer per adapter instance structure |
1908 | * |
1909 | * Return Value |
1910 | * none |
1911 | */ |
1912 | static void pmcraid_register_hcams(struct pmcraid_instance *pinstance) |
1913 | { |
1914 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
1915 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
1916 | } |
1917 | |
1918 | /** |
1919 | * pmcraid_unregister_hcams - cancel HCAMs registered already |
1920 | * @cmd: pointer to command used as part of reset sequence |
1921 | */ |
1922 | static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd) |
1923 | { |
1924 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1925 | |
1926 | /* During IOA bringdown, HCAM gets fired and tasklet proceeds with |
1927 | * handling hcam response though it is not necessary. In order to |
1928 | * prevent this, set 'ignore', so that bring-down sequence doesn't |
1929 | * re-send any more hcams |
1930 | */ |
1931 | atomic_set(&pinstance->ccn.ignore, 1); |
1932 | atomic_set(&pinstance->ldn.ignore, 1); |
1933 | |
1934 | /* If adapter reset was forced as part of runtime reset sequence, |
1935 | * start the reset sequence. Reset will be triggered even in case |
1936 | * IOA unit_check. |
1937 | */ |
1938 | if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) || |
1939 | pinstance->ioa_unit_check) { |
1940 | pinstance->force_ioa_reset = 0; |
1941 | pinstance->ioa_unit_check = 0; |
1942 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
1943 | pmcraid_reset_alert(cmd); |
1944 | return; |
1945 | } |
1946 | |
1947 | /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM |
1948 | * one after the other. So CCN cancellation will be triggered by |
1949 | * pmcraid_cancel_ldn itself. |
1950 | */ |
1951 | pmcraid_cancel_ldn(cmd); |
1952 | } |
1953 | |
1954 | /** |
1955 | * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset |
1956 | * @pinstance: pointer to adapter instance structure |
1957 | * Return Value |
1958 | * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0 |
1959 | */ |
1960 | static void pmcraid_reinit_buffers(struct pmcraid_instance *); |
1961 | |
1962 | static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance) |
1963 | { |
1964 | u32 intrs; |
1965 | |
1966 | pmcraid_reinit_buffers(pinstance); |
1967 | intrs = pmcraid_read_interrupts(pinstance); |
1968 | |
1969 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
1970 | |
1971 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) { |
1972 | if (!pinstance->interrupt_mode) { |
1973 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
1974 | pinstance->int_regs. |
1975 | ioa_host_interrupt_mask_reg); |
1976 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
1977 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
1978 | } |
1979 | return 1; |
1980 | } else { |
1981 | return 0; |
1982 | } |
1983 | } |
1984 | |
1985 | /** |
1986 | * pmcraid_soft_reset - performs a soft reset and makes IOA become ready |
1987 | * @cmd : pointer to reset command block |
1988 | * |
1989 | * Return Value |
1990 | * none |
1991 | */ |
1992 | static void pmcraid_soft_reset(struct pmcraid_cmd *cmd) |
1993 | { |
1994 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1995 | u32 int_reg; |
1996 | u32 doorbell; |
1997 | |
1998 | /* There will be an interrupt when Transition to Operational bit is |
1999 | * set so tasklet would execute next reset task. The timeout handler |
2000 | * would re-initiate a reset |
2001 | */ |
2002 | cmd->cmd_done = pmcraid_ioa_reset; |
2003 | cmd->timer.data = (unsigned long)cmd; |
2004 | cmd->timer.expires = jiffies + |
2005 | msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT); |
2006 | cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler; |
2007 | |
2008 | if (!timer_pending(&cmd->timer)) |
2009 | add_timer(&cmd->timer); |
2010 | |
2011 | /* Enable destructive diagnostics on IOA if it is not yet in |
2012 | * operational state |
2013 | */ |
2014 | doorbell = DOORBELL_RUNTIME_RESET | |
2015 | DOORBELL_ENABLE_DESTRUCTIVE_DIAGS; |
2016 | |
2017 | /* Since we do RESET_ALERT and Start BIST we have to again write |
2018 | * MSIX Doorbell to indicate the interrupt mode |
2019 | */ |
2020 | if (pinstance->interrupt_mode) { |
2021 | iowrite32(DOORBELL_INTR_MODE_MSIX, |
2022 | pinstance->int_regs.host_ioa_interrupt_reg); |
2023 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
2024 | } |
2025 | |
2026 | iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg); |
2027 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg), |
2028 | int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
2029 | |
2030 | pmcraid_info("Waiting for IOA to become operational %x:%x\n", |
2031 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg), |
2032 | int_reg); |
2033 | } |
2034 | |
2035 | /** |
2036 | * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt |
2037 | * |
2038 | * @pinstance: pointer to adapter instance structure |
2039 | * |
2040 | * Return Value |
2041 | * none |
2042 | */ |
2043 | static void pmcraid_get_dump(struct pmcraid_instance *pinstance) |
2044 | { |
2045 | pmcraid_info("%s is not yet implemented\n", __func__); |
2046 | } |
2047 | |
2048 | /** |
2049 | * pmcraid_fail_outstanding_cmds - Fails all outstanding ops. |
2050 | * @pinstance: pointer to adapter instance structure |
2051 | * |
2052 | * This function fails all outstanding ops. If they are submitted to IOA |
2053 | * already, it sends cancel all messages if IOA is still accepting IOARCBs, |
2054 | * otherwise just completes the commands and returns the cmd blocks to free |
2055 | * pool. |
2056 | * |
2057 | * Return value: |
2058 | * none |
2059 | */ |
2060 | static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance) |
2061 | { |
2062 | struct pmcraid_cmd *cmd, *temp; |
2063 | unsigned long lock_flags; |
2064 | |
2065 | /* pending command list is protected by pending_pool_lock. Its |
2066 | * traversal must be done as within this lock |
2067 | */ |
2068 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
2069 | list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool, |
2070 | free_list) { |
2071 | list_del(&cmd->free_list); |
2072 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
2073 | lock_flags); |
2074 | cmd->ioa_cb->ioasa.ioasc = |
2075 | cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET); |
2076 | cmd->ioa_cb->ioasa.ilid = |
2077 | cpu_to_be32(PMCRAID_DRIVER_ILID); |
2078 | |
2079 | /* In case the command timer is still running */ |
2080 | del_timer(&cmd->timer); |
2081 | |
2082 | /* If this is an IO command, complete it by invoking scsi_done |
2083 | * function. If this is one of the internal commands other |
2084 | * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to |
2085 | * complete it |
2086 | */ |
2087 | if (cmd->scsi_cmd) { |
2088 | |
2089 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
2090 | __le32 resp = cmd->ioa_cb->ioarcb.response_handle; |
2091 | |
2092 | scsi_cmd->result |= DID_ERROR << 16; |
2093 | |
2094 | scsi_dma_unmap(scsi_cmd); |
2095 | pmcraid_return_cmd(cmd); |
2096 | |
2097 | pmcraid_info("failing(%d) CDB[0] = %x result: %x\n", |
2098 | le32_to_cpu(resp) >> 2, |
2099 | cmd->ioa_cb->ioarcb.cdb[0], |
2100 | scsi_cmd->result); |
2101 | scsi_cmd->scsi_done(scsi_cmd); |
2102 | } else if (cmd->cmd_done == pmcraid_internal_done || |
2103 | cmd->cmd_done == pmcraid_erp_done) { |
2104 | cmd->cmd_done(cmd); |
2105 | } else if (cmd->cmd_done != pmcraid_ioa_reset && |
2106 | cmd->cmd_done != pmcraid_ioa_shutdown_done) { |
2107 | pmcraid_return_cmd(cmd); |
2108 | } |
2109 | |
2110 | atomic_dec(&pinstance->outstanding_cmds); |
2111 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
2112 | } |
2113 | |
2114 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); |
2115 | } |
2116 | |
2117 | /** |
2118 | * pmcraid_ioa_reset - Implementation of IOA reset logic |
2119 | * |
2120 | * @cmd: pointer to the cmd block to be used for entire reset process |
2121 | * |
2122 | * This function executes most of the steps required for IOA reset. This gets |
2123 | * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's |
2124 | * 'eh_' thread. Access to variables used for controlling the reset sequence is |
2125 | * synchronized using host lock. Various functions called during reset process |
2126 | * would make use of a single command block, pointer to which is also stored in |
2127 | * adapter instance structure. |
2128 | * |
2129 | * Return Value |
2130 | * None |
2131 | */ |
2132 | static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd) |
2133 | { |
2134 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
2135 | u8 reset_complete = 0; |
2136 | |
2137 | pinstance->ioa_reset_in_progress = 1; |
2138 | |
2139 | if (pinstance->reset_cmd != cmd) { |
2140 | pmcraid_err("reset is called with different command block\n"); |
2141 | pinstance->reset_cmd = cmd; |
2142 | } |
2143 | |
2144 | pmcraid_info("reset_engine: state = %d, command = %p\n", |
2145 | pinstance->ioa_state, cmd); |
2146 | |
2147 | switch (pinstance->ioa_state) { |
2148 | |
2149 | case IOA_STATE_DEAD: |
2150 | /* If IOA is offline, whatever may be the reset reason, just |
2151 | * return. callers might be waiting on the reset wait_q, wake |
2152 | * up them |
2153 | */ |
2154 | pmcraid_err("IOA is offline no reset is possible\n"); |
2155 | reset_complete = 1; |
2156 | break; |
2157 | |
2158 | case IOA_STATE_IN_BRINGDOWN: |
2159 | /* we enter here, once ioa shutdown command is processed by IOA |
2160 | * Alert IOA for a possible reset. If reset alert fails, IOA |
2161 | * goes through hard-reset |
2162 | */ |
2163 | pmcraid_disable_interrupts(pinstance, ~0); |
2164 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
2165 | pmcraid_reset_alert(cmd); |
2166 | break; |
2167 | |
2168 | case IOA_STATE_UNKNOWN: |
2169 | /* We may be called during probe or resume. Some pre-processing |
2170 | * is required for prior to reset |
2171 | */ |
2172 | scsi_block_requests(pinstance->host); |
2173 | |
2174 | /* If asked to reset while IOA was processing responses or |
2175 | * there are any error responses then IOA may require |
2176 | * hard-reset. |
2177 | */ |
2178 | if (pinstance->ioa_hard_reset == 0) { |
2179 | if (ioread32(pinstance->ioa_status) & |
2180 | INTRS_TRANSITION_TO_OPERATIONAL) { |
2181 | pmcraid_info("sticky bit set, bring-up\n"); |
2182 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
2183 | pmcraid_reinit_cmdblk(cmd); |
2184 | pmcraid_identify_hrrq(cmd); |
2185 | } else { |
2186 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; |
2187 | pmcraid_soft_reset(cmd); |
2188 | } |
2189 | } else { |
2190 | /* Alert IOA of a possible reset and wait for critical |
2191 | * operation in progress bit to reset |
2192 | */ |
2193 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
2194 | pmcraid_reset_alert(cmd); |
2195 | } |
2196 | break; |
2197 | |
2198 | case IOA_STATE_IN_RESET_ALERT: |
2199 | /* If critical operation in progress bit is reset or wait gets |
2200 | * timed out, reset proceeds with starting BIST on the IOA. |
2201 | * pmcraid_ioa_hard_reset keeps a count of reset attempts. If |
2202 | * they are 3 or more, reset engine marks IOA dead and returns |
2203 | */ |
2204 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; |
2205 | pmcraid_start_bist(cmd); |
2206 | break; |
2207 | |
2208 | case IOA_STATE_IN_HARD_RESET: |
2209 | pinstance->ioa_reset_attempts++; |
2210 | |
2211 | /* retry reset if we haven't reached maximum allowed limit */ |
2212 | if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) { |
2213 | pinstance->ioa_reset_attempts = 0; |
2214 | pmcraid_err("IOA didn't respond marking it as dead\n"); |
2215 | pinstance->ioa_state = IOA_STATE_DEAD; |
2216 | |
2217 | if (pinstance->ioa_bringdown) |
2218 | pmcraid_notify_ioastate(pinstance, |
2219 | PMC_DEVICE_EVENT_SHUTDOWN_FAILED); |
2220 | else |
2221 | pmcraid_notify_ioastate(pinstance, |
2222 | PMC_DEVICE_EVENT_RESET_FAILED); |
2223 | reset_complete = 1; |
2224 | break; |
2225 | } |
2226 | |
2227 | /* Once either bist or pci reset is done, restore PCI config |
2228 | * space. If this fails, proceed with hard reset again |
2229 | */ |
2230 | pci_restore_state(pinstance->pdev); |
2231 | |
2232 | /* fail all pending commands */ |
2233 | pmcraid_fail_outstanding_cmds(pinstance); |
2234 | |
2235 | /* check if unit check is active, if so extract dump */ |
2236 | if (pinstance->ioa_unit_check) { |
2237 | pmcraid_info("unit check is active\n"); |
2238 | pinstance->ioa_unit_check = 0; |
2239 | pmcraid_get_dump(pinstance); |
2240 | pinstance->ioa_reset_attempts--; |
2241 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
2242 | pmcraid_reset_alert(cmd); |
2243 | break; |
2244 | } |
2245 | |
2246 | /* if the reset reason is to bring-down the ioa, we might be |
2247 | * done with the reset restore pci_config_space and complete |
2248 | * the reset |
2249 | */ |
2250 | if (pinstance->ioa_bringdown) { |
2251 | pmcraid_info("bringing down the adapter\n"); |
2252 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
2253 | pinstance->ioa_bringdown = 0; |
2254 | pinstance->ioa_state = IOA_STATE_UNKNOWN; |
2255 | pmcraid_notify_ioastate(pinstance, |
2256 | PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS); |
2257 | reset_complete = 1; |
2258 | } else { |
2259 | /* bring-up IOA, so proceed with soft reset |
2260 | * Reinitialize hrrq_buffers and their indices also |
2261 | * enable interrupts after a pci_restore_state |
2262 | */ |
2263 | if (pmcraid_reset_enable_ioa(pinstance)) { |
2264 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
2265 | pmcraid_info("bringing up the adapter\n"); |
2266 | pmcraid_reinit_cmdblk(cmd); |
2267 | pmcraid_identify_hrrq(cmd); |
2268 | } else { |
2269 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; |
2270 | pmcraid_soft_reset(cmd); |
2271 | } |
2272 | } |
2273 | break; |
2274 | |
2275 | case IOA_STATE_IN_SOFT_RESET: |
2276 | /* TRANSITION TO OPERATIONAL is on so start initialization |
2277 | * sequence |
2278 | */ |
2279 | pmcraid_info("In softreset proceeding with bring-up\n"); |
2280 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
2281 | |
2282 | /* Initialization commands start with HRRQ identification. From |
2283 | * now on tasklet completes most of the commands as IOA is up |
2284 | * and intrs are enabled |
2285 | */ |
2286 | pmcraid_identify_hrrq(cmd); |
2287 | break; |
2288 | |
2289 | case IOA_STATE_IN_BRINGUP: |
2290 | /* we are done with bringing up of IOA, change the ioa_state to |
2291 | * operational and wake up any waiters |
2292 | */ |
2293 | pinstance->ioa_state = IOA_STATE_OPERATIONAL; |
2294 | reset_complete = 1; |
2295 | break; |
2296 | |
2297 | case IOA_STATE_OPERATIONAL: |
2298 | default: |
2299 | /* When IOA is operational and a reset is requested, check for |
2300 | * the reset reason. If reset is to bring down IOA, unregister |
2301 | * HCAMs and initiate shutdown; if adapter reset is forced then |
2302 | * restart reset sequence again |
2303 | */ |
2304 | if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE && |
2305 | pinstance->force_ioa_reset == 0) { |
2306 | pmcraid_notify_ioastate(pinstance, |
2307 | PMC_DEVICE_EVENT_RESET_SUCCESS); |
2308 | reset_complete = 1; |
2309 | } else { |
2310 | if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE) |
2311 | pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN; |
2312 | pmcraid_reinit_cmdblk(cmd); |
2313 | pmcraid_unregister_hcams(cmd); |
2314 | } |
2315 | break; |
2316 | } |
2317 | |
2318 | /* reset will be completed if ioa_state is either DEAD or UNKNOWN or |
2319 | * OPERATIONAL. Reset all control variables used during reset, wake up |
2320 | * any waiting threads and let the SCSI mid-layer send commands. Note |
2321 | * that host_lock must be held before invoking scsi_report_bus_reset. |
2322 | */ |
2323 | if (reset_complete) { |
2324 | pinstance->ioa_reset_in_progress = 0; |
2325 | pinstance->ioa_reset_attempts = 0; |
2326 | pinstance->reset_cmd = NULL; |
2327 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
2328 | pinstance->ioa_bringdown = 0; |
2329 | pmcraid_return_cmd(cmd); |
2330 | |
2331 | /* If target state is to bring up the adapter, proceed with |
2332 | * hcam registration and resource exposure to mid-layer. |
2333 | */ |
2334 | if (pinstance->ioa_state == IOA_STATE_OPERATIONAL) |
2335 | pmcraid_register_hcams(pinstance); |
2336 | |
2337 | wake_up_all(&pinstance->reset_wait_q); |
2338 | } |
2339 | |
2340 | return; |
2341 | } |
2342 | |
2343 | /** |
2344 | * pmcraid_initiate_reset - initiates reset sequence. This is called from |
2345 | * ISR/tasklet during error interrupts including IOA unit check. If reset |
2346 | * is already in progress, it just returns, otherwise initiates IOA reset |
2347 | * to bring IOA up to operational state. |
2348 | * |
2349 | * @pinstance: pointer to adapter instance structure |
2350 | * |
2351 | * Return value |
2352 | * none |
2353 | */ |
2354 | static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance) |
2355 | { |
2356 | struct pmcraid_cmd *cmd; |
2357 | |
2358 | /* If the reset is already in progress, just return, otherwise start |
2359 | * reset sequence and return |
2360 | */ |
2361 | if (!pinstance->ioa_reset_in_progress) { |
2362 | scsi_block_requests(pinstance->host); |
2363 | cmd = pmcraid_get_free_cmd(pinstance); |
2364 | |
2365 | if (cmd == NULL) { |
2366 | pmcraid_err("no cmnd blocks for initiate_reset\n"); |
2367 | return; |
2368 | } |
2369 | |
2370 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
2371 | pinstance->reset_cmd = cmd; |
2372 | pinstance->force_ioa_reset = 1; |
2373 | pmcraid_notify_ioastate(pinstance, |
2374 | PMC_DEVICE_EVENT_RESET_START); |
2375 | pmcraid_ioa_reset(cmd); |
2376 | } |
2377 | } |
2378 | |
2379 | /** |
2380 | * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup |
2381 | * or bringdown IOA |
2382 | * @pinstance: pointer adapter instance structure |
2383 | * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV |
2384 | * @target_state: expected target state after reset |
2385 | * |
2386 | * Note: This command initiates reset and waits for its completion. Hence this |
2387 | * should not be called from isr/timer/tasklet functions (timeout handlers, |
2388 | * error response handlers and interrupt handlers). |
2389 | * |
2390 | * Return Value |
2391 | * 1 in case ioa_state is not target_state, 0 otherwise. |
2392 | */ |
2393 | static int pmcraid_reset_reload( |
2394 | struct pmcraid_instance *pinstance, |
2395 | u8 shutdown_type, |
2396 | u8 target_state |
2397 | ) |
2398 | { |
2399 | struct pmcraid_cmd *reset_cmd = NULL; |
2400 | unsigned long lock_flags; |
2401 | int reset = 1; |
2402 | |
2403 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
2404 | |
2405 | if (pinstance->ioa_reset_in_progress) { |
2406 | pmcraid_info("reset_reload: reset is already in progress\n"); |
2407 | |
2408 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2409 | |
2410 | wait_event(pinstance->reset_wait_q, |
2411 | !pinstance->ioa_reset_in_progress); |
2412 | |
2413 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
2414 | |
2415 | if (pinstance->ioa_state == IOA_STATE_DEAD) { |
2416 | spin_unlock_irqrestore(pinstance->host->host_lock, |
2417 | lock_flags); |
2418 | pmcraid_info("reset_reload: IOA is dead\n"); |
2419 | return reset; |
2420 | } else if (pinstance->ioa_state == target_state) { |
2421 | reset = 0; |
2422 | } |
2423 | } |
2424 | |
2425 | if (reset) { |
2426 | pmcraid_info("reset_reload: proceeding with reset\n"); |
2427 | scsi_block_requests(pinstance->host); |
2428 | reset_cmd = pmcraid_get_free_cmd(pinstance); |
2429 | |
2430 | if (reset_cmd == NULL) { |
2431 | pmcraid_err("no free cmnd for reset_reload\n"); |
2432 | spin_unlock_irqrestore(pinstance->host->host_lock, |
2433 | lock_flags); |
2434 | return reset; |
2435 | } |
2436 | |
2437 | if (shutdown_type == SHUTDOWN_NORMAL) |
2438 | pinstance->ioa_bringdown = 1; |
2439 | |
2440 | pinstance->ioa_shutdown_type = shutdown_type; |
2441 | pinstance->reset_cmd = reset_cmd; |
2442 | pinstance->force_ioa_reset = reset; |
2443 | pmcraid_info("reset_reload: initiating reset\n"); |
2444 | pmcraid_ioa_reset(reset_cmd); |
2445 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2446 | pmcraid_info("reset_reload: waiting for reset to complete\n"); |
2447 | wait_event(pinstance->reset_wait_q, |
2448 | !pinstance->ioa_reset_in_progress); |
2449 | |
2450 | pmcraid_info("reset_reload: reset is complete !!\n"); |
2451 | scsi_unblock_requests(pinstance->host); |
2452 | if (pinstance->ioa_state == target_state) |
2453 | reset = 0; |
2454 | } |
2455 | |
2456 | return reset; |
2457 | } |
2458 | |
2459 | /** |
2460 | * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA |
2461 | * |
2462 | * @pinstance: pointer to adapter instance structure |
2463 | * |
2464 | * Return Value |
2465 | * whatever is returned from pmcraid_reset_reload |
2466 | */ |
2467 | static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance) |
2468 | { |
2469 | return pmcraid_reset_reload(pinstance, |
2470 | SHUTDOWN_NORMAL, |
2471 | IOA_STATE_UNKNOWN); |
2472 | } |
2473 | |
2474 | /** |
2475 | * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA |
2476 | * |
2477 | * @pinstance: pointer to adapter instance structure |
2478 | * |
2479 | * Return Value |
2480 | * whatever is returned from pmcraid_reset_reload |
2481 | */ |
2482 | static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance) |
2483 | { |
2484 | pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START); |
2485 | |
2486 | return pmcraid_reset_reload(pinstance, |
2487 | SHUTDOWN_NONE, |
2488 | IOA_STATE_OPERATIONAL); |
2489 | } |
2490 | |
2491 | /** |
2492 | * pmcraid_request_sense - Send request sense to a device |
2493 | * @cmd: pmcraid command struct |
2494 | * |
2495 | * This function sends a request sense to a device as a result of a check |
2496 | * condition. This method re-uses the same command block that failed earlier. |
2497 | */ |
2498 | static void pmcraid_request_sense(struct pmcraid_cmd *cmd) |
2499 | { |
2500 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
2501 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
2502 | |
2503 | /* allocate DMAable memory for sense buffers */ |
2504 | cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev, |
2505 | SCSI_SENSE_BUFFERSIZE, |
2506 | &cmd->sense_buffer_dma); |
2507 | |
2508 | if (cmd->sense_buffer == NULL) { |
2509 | pmcraid_err |
2510 | ("couldn't allocate sense buffer for request sense\n"); |
2511 | pmcraid_erp_done(cmd); |
2512 | return; |
2513 | } |
2514 | |
2515 | /* re-use the command block */ |
2516 | memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa)); |
2517 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
2518 | ioarcb->request_flags0 = (SYNC_COMPLETE | |
2519 | NO_LINK_DESCS | |
2520 | INHIBIT_UL_CHECK); |
2521 | ioarcb->request_type = REQ_TYPE_SCSI; |
2522 | ioarcb->cdb[0] = REQUEST_SENSE; |
2523 | ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE; |
2524 | |
2525 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
2526 | offsetof(struct pmcraid_ioarcb, |
2527 | add_data.u.ioadl[0])); |
2528 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
2529 | |
2530 | ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); |
2531 | |
2532 | ioadl->address = cpu_to_le64(cmd->sense_buffer_dma); |
2533 | ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); |
2534 | ioadl->flags = IOADL_FLAGS_LAST_DESC; |
2535 | |
2536 | /* request sense might be called as part of error response processing |
2537 | * which runs in tasklets context. It is possible that mid-layer might |
2538 | * schedule queuecommand during this time, hence, writting to IOARRIN |
2539 | * must be protect by host_lock |
2540 | */ |
2541 | pmcraid_send_cmd(cmd, pmcraid_erp_done, |
2542 | PMCRAID_REQUEST_SENSE_TIMEOUT, |
2543 | pmcraid_timeout_handler); |
2544 | } |
2545 | |
2546 | /** |
2547 | * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery |
2548 | * @cmd: command that failed |
2549 | * @sense: true if request_sense is required after cancel all |
2550 | * |
2551 | * This function sends a cancel all to a device to clear the queue. |
2552 | */ |
2553 | static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense) |
2554 | { |
2555 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
2556 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
2557 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; |
2558 | void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done |
2559 | : pmcraid_request_sense; |
2560 | |
2561 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
2562 | ioarcb->request_flags0 = SYNC_OVERRIDE; |
2563 | ioarcb->request_type = REQ_TYPE_IOACMD; |
2564 | ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS; |
2565 | |
2566 | if (RES_IS_GSCSI(res->cfg_entry)) |
2567 | ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL; |
2568 | |
2569 | ioarcb->ioadl_bus_addr = 0; |
2570 | ioarcb->ioadl_length = 0; |
2571 | ioarcb->data_transfer_length = 0; |
2572 | ioarcb->ioarcb_bus_addr &= (~0x1FULL); |
2573 | |
2574 | /* writing to IOARRIN must be protected by host_lock, as mid-layer |
2575 | * schedule queuecommand while we are doing this |
2576 | */ |
2577 | pmcraid_send_cmd(cmd, cmd_done, |
2578 | PMCRAID_REQUEST_SENSE_TIMEOUT, |
2579 | pmcraid_timeout_handler); |
2580 | } |
2581 | |
2582 | /** |
2583 | * pmcraid_frame_auto_sense: frame fixed format sense information |
2584 | * |
2585 | * @cmd: pointer to failing command block |
2586 | * |
2587 | * Return value |
2588 | * none |
2589 | */ |
2590 | static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd) |
2591 | { |
2592 | u8 *sense_buf = cmd->scsi_cmd->sense_buffer; |
2593 | struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata; |
2594 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; |
2595 | u32 ioasc = le32_to_cpu(ioasa->ioasc); |
2596 | u32 failing_lba = 0; |
2597 | |
2598 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
2599 | cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION; |
2600 | |
2601 | if (RES_IS_VSET(res->cfg_entry) && |
2602 | ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC && |
2603 | ioasa->u.vset.failing_lba_hi != 0) { |
2604 | |
2605 | sense_buf[0] = 0x72; |
2606 | sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc); |
2607 | sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc); |
2608 | sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc); |
2609 | |
2610 | sense_buf[7] = 12; |
2611 | sense_buf[8] = 0; |
2612 | sense_buf[9] = 0x0A; |
2613 | sense_buf[10] = 0x80; |
2614 | |
2615 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi); |
2616 | |
2617 | sense_buf[12] = (failing_lba & 0xff000000) >> 24; |
2618 | sense_buf[13] = (failing_lba & 0x00ff0000) >> 16; |
2619 | sense_buf[14] = (failing_lba & 0x0000ff00) >> 8; |
2620 | sense_buf[15] = failing_lba & 0x000000ff; |
2621 | |
2622 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo); |
2623 | |
2624 | sense_buf[16] = (failing_lba & 0xff000000) >> 24; |
2625 | sense_buf[17] = (failing_lba & 0x00ff0000) >> 16; |
2626 | sense_buf[18] = (failing_lba & 0x0000ff00) >> 8; |
2627 | sense_buf[19] = failing_lba & 0x000000ff; |
2628 | } else { |
2629 | sense_buf[0] = 0x70; |
2630 | sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc); |
2631 | sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc); |
2632 | sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc); |
2633 | |
2634 | if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) { |
2635 | if (RES_IS_VSET(res->cfg_entry)) |
2636 | failing_lba = |
2637 | le32_to_cpu(ioasa->u. |
2638 | vset.failing_lba_lo); |
2639 | sense_buf[0] |= 0x80; |
2640 | sense_buf[3] = (failing_lba >> 24) & 0xff; |
2641 | sense_buf[4] = (failing_lba >> 16) & 0xff; |
2642 | sense_buf[5] = (failing_lba >> 8) & 0xff; |
2643 | sense_buf[6] = failing_lba & 0xff; |
2644 | } |
2645 | |
2646 | sense_buf[7] = 6; /* additional length */ |
2647 | } |
2648 | } |
2649 | |
2650 | /** |
2651 | * pmcraid_error_handler - Error response handlers for a SCSI op |
2652 | * @cmd: pointer to pmcraid_cmd that has failed |
2653 | * |
2654 | * This function determines whether or not to initiate ERP on the affected |
2655 | * device. This is called from a tasklet, which doesn't hold any locks. |
2656 | * |
2657 | * Return value: |
2658 | * 0 it caller can complete the request, otherwise 1 where in error |
2659 | * handler itself completes the request and returns the command block |
2660 | * back to free-pool |
2661 | */ |
2662 | static int pmcraid_error_handler(struct pmcraid_cmd *cmd) |
2663 | { |
2664 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
2665 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; |
2666 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
2667 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; |
2668 | u32 ioasc = le32_to_cpu(ioasa->ioasc); |
2669 | u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK; |
2670 | u32 sense_copied = 0; |
2671 | |
2672 | if (!res) { |
2673 | pmcraid_info("resource pointer is NULL\n"); |
2674 | return 0; |
2675 | } |
2676 | |
2677 | /* If this was a SCSI read/write command keep count of errors */ |
2678 | if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD) |
2679 | atomic_inc(&res->read_failures); |
2680 | else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD) |
2681 | atomic_inc(&res->write_failures); |
2682 | |
2683 | if (!RES_IS_GSCSI(res->cfg_entry) && |
2684 | masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) { |
2685 | pmcraid_frame_auto_sense(cmd); |
2686 | } |
2687 | |
2688 | /* Log IOASC/IOASA information based on user settings */ |
2689 | pmcraid_ioasc_logger(ioasc, cmd); |
2690 | |
2691 | switch (masked_ioasc) { |
2692 | |
2693 | case PMCRAID_IOASC_AC_TERMINATED_BY_HOST: |
2694 | scsi_cmd->result |= (DID_ABORT << 16); |
2695 | break; |
2696 | |
2697 | case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE: |
2698 | case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE: |
2699 | scsi_cmd->result |= (DID_NO_CONNECT << 16); |
2700 | break; |
2701 | |
2702 | case PMCRAID_IOASC_NR_SYNC_REQUIRED: |
2703 | res->sync_reqd = 1; |
2704 | scsi_cmd->result |= (DID_IMM_RETRY << 16); |
2705 | break; |
2706 | |
2707 | case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC: |
2708 | scsi_cmd->result |= (DID_PASSTHROUGH << 16); |
2709 | break; |
2710 | |
2711 | case PMCRAID_IOASC_UA_BUS_WAS_RESET: |
2712 | case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER: |
2713 | if (!res->reset_progress) |
2714 | scsi_report_bus_reset(pinstance->host, |
2715 | scsi_cmd->device->channel); |
2716 | scsi_cmd->result |= (DID_ERROR << 16); |
2717 | break; |
2718 | |
2719 | case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR: |
2720 | scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc); |
2721 | res->sync_reqd = 1; |
2722 | |
2723 | /* if check_condition is not active return with error otherwise |
2724 | * get/frame the sense buffer |
2725 | */ |
2726 | if (PMCRAID_IOASC_SENSE_STATUS(ioasc) != |
2727 | SAM_STAT_CHECK_CONDITION && |
2728 | PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE) |
2729 | return 0; |
2730 | |
2731 | /* If we have auto sense data as part of IOASA pass it to |
2732 | * mid-layer |
2733 | */ |
2734 | if (ioasa->auto_sense_length != 0) { |
2735 | short sense_len = ioasa->auto_sense_length; |
2736 | int data_size = min_t(u16, le16_to_cpu(sense_len), |
2737 | SCSI_SENSE_BUFFERSIZE); |
2738 | |
2739 | memcpy(scsi_cmd->sense_buffer, |
2740 | ioasa->sense_data, |
2741 | data_size); |
2742 | sense_copied = 1; |
2743 | } |
2744 | |
2745 | if (RES_IS_GSCSI(res->cfg_entry)) |
2746 | pmcraid_cancel_all(cmd, sense_copied); |
2747 | else if (sense_copied) |
2748 | pmcraid_erp_done(cmd); |
2749 | else |
2750 | pmcraid_request_sense(cmd); |
2751 | |
2752 | return 1; |
2753 | |
2754 | case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED: |
2755 | break; |
2756 | |
2757 | default: |
2758 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR) |
2759 | scsi_cmd->result |= (DID_ERROR << 16); |
2760 | break; |
2761 | } |
2762 | return 0; |
2763 | } |
2764 | |
2765 | /** |
2766 | * pmcraid_reset_device - device reset handler functions |
2767 | * |
2768 | * @scsi_cmd: scsi command struct |
2769 | * @modifier: reset modifier indicating the reset sequence to be performed |
2770 | * |
2771 | * This function issues a device reset to the affected device. |
2772 | * A LUN reset will be sent to the device first. If that does |
2773 | * not work, a target reset will be sent. |
2774 | * |
2775 | * Return value: |
2776 | * SUCCESS / FAILED |
2777 | */ |
2778 | static int pmcraid_reset_device( |
2779 | struct scsi_cmnd *scsi_cmd, |
2780 | unsigned long timeout, |
2781 | u8 modifier |
2782 | ) |
2783 | { |
2784 | struct pmcraid_cmd *cmd; |
2785 | struct pmcraid_instance *pinstance; |
2786 | struct pmcraid_resource_entry *res; |
2787 | struct pmcraid_ioarcb *ioarcb; |
2788 | unsigned long lock_flags; |
2789 | u32 ioasc; |
2790 | |
2791 | pinstance = |
2792 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
2793 | res = scsi_cmd->device->hostdata; |
2794 | |
2795 | if (!res) { |
2796 | sdev_printk(KERN_ERR, scsi_cmd->device, |
2797 | "reset_device: NULL resource pointer\n"); |
2798 | return FAILED; |
2799 | } |
2800 | |
2801 | /* If adapter is currently going through reset/reload, return failed. |
2802 | * This will force the mid-layer to call _eh_bus/host reset, which |
2803 | * will then go to sleep and wait for the reset to complete |
2804 | */ |
2805 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
2806 | if (pinstance->ioa_reset_in_progress || |
2807 | pinstance->ioa_state == IOA_STATE_DEAD) { |
2808 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2809 | return FAILED; |
2810 | } |
2811 | |
2812 | res->reset_progress = 1; |
2813 | pmcraid_info("Resetting %s resource with addr %x\n", |
2814 | ((modifier & RESET_DEVICE_LUN) ? "LUN" : |
2815 | ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")), |
2816 | le32_to_cpu(res->cfg_entry.resource_address)); |
2817 | |
2818 | /* get a free cmd block */ |
2819 | cmd = pmcraid_get_free_cmd(pinstance); |
2820 | |
2821 | if (cmd == NULL) { |
2822 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2823 | pmcraid_err("%s: no cmd blocks are available\n", __func__); |
2824 | return FAILED; |
2825 | } |
2826 | |
2827 | ioarcb = &cmd->ioa_cb->ioarcb; |
2828 | ioarcb->resource_handle = res->cfg_entry.resource_handle; |
2829 | ioarcb->request_type = REQ_TYPE_IOACMD; |
2830 | ioarcb->cdb[0] = PMCRAID_RESET_DEVICE; |
2831 | |
2832 | /* Initialize reset modifier bits */ |
2833 | if (modifier) |
2834 | modifier = ENABLE_RESET_MODIFIER | modifier; |
2835 | |
2836 | ioarcb->cdb[1] = modifier; |
2837 | |
2838 | init_completion(&cmd->wait_for_completion); |
2839 | cmd->completion_req = 1; |
2840 | |
2841 | pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n", |
2842 | cmd->ioa_cb->ioarcb.cdb[0], |
2843 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle), |
2844 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2); |
2845 | |
2846 | pmcraid_send_cmd(cmd, |
2847 | pmcraid_internal_done, |
2848 | timeout, |
2849 | pmcraid_timeout_handler); |
2850 | |
2851 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2852 | |
2853 | /* RESET_DEVICE command completes after all pending IOARCBs are |
2854 | * completed. Once this command is completed, pmcraind_internal_done |
2855 | * will wake up the 'completion' queue. |
2856 | */ |
2857 | wait_for_completion(&cmd->wait_for_completion); |
2858 | |
2859 | /* complete the command here itself and return the command block |
2860 | * to free list |
2861 | */ |
2862 | pmcraid_return_cmd(cmd); |
2863 | res->reset_progress = 0; |
2864 | ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
2865 | |
2866 | /* set the return value based on the returned ioasc */ |
2867 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; |
2868 | } |
2869 | |
2870 | /** |
2871 | * _pmcraid_io_done - helper for pmcraid_io_done function |
2872 | * |
2873 | * @cmd: pointer to pmcraid command struct |
2874 | * @reslen: residual data length to be set in the ioasa |
2875 | * @ioasc: ioasc either returned by IOA or set by driver itself. |
2876 | * |
2877 | * This function is invoked by pmcraid_io_done to complete mid-layer |
2878 | * scsi ops. |
2879 | * |
2880 | * Return value: |
2881 | * 0 if caller is required to return it to free_pool. Returns 1 if |
2882 | * caller need not worry about freeing command block as error handler |
2883 | * will take care of that. |
2884 | */ |
2885 | |
2886 | static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc) |
2887 | { |
2888 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
2889 | int rc = 0; |
2890 | |
2891 | scsi_set_resid(scsi_cmd, reslen); |
2892 | |
2893 | pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n", |
2894 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2, |
2895 | cmd->ioa_cb->ioarcb.cdb[0], |
2896 | ioasc, scsi_cmd->result); |
2897 | |
2898 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0) |
2899 | rc = pmcraid_error_handler(cmd); |
2900 | |
2901 | if (rc == 0) { |
2902 | scsi_dma_unmap(scsi_cmd); |
2903 | scsi_cmd->scsi_done(scsi_cmd); |
2904 | } |
2905 | |
2906 | return rc; |
2907 | } |
2908 | |
2909 | /** |
2910 | * pmcraid_io_done - SCSI completion function |
2911 | * |
2912 | * @cmd: pointer to pmcraid command struct |
2913 | * |
2914 | * This function is invoked by tasklet/mid-layer error handler to completing |
2915 | * the SCSI ops sent from mid-layer. |
2916 | * |
2917 | * Return value |
2918 | * none |
2919 | */ |
2920 | |
2921 | static void pmcraid_io_done(struct pmcraid_cmd *cmd) |
2922 | { |
2923 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
2924 | u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length); |
2925 | |
2926 | if (_pmcraid_io_done(cmd, reslen, ioasc) == 0) |
2927 | pmcraid_return_cmd(cmd); |
2928 | } |
2929 | |
2930 | /** |
2931 | * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA |
2932 | * |
2933 | * @cmd: command block of the command to be aborted |
2934 | * |
2935 | * Return Value: |
2936 | * returns pointer to command structure used as cancelling cmd |
2937 | */ |
2938 | static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd) |
2939 | { |
2940 | struct pmcraid_cmd *cancel_cmd; |
2941 | struct pmcraid_instance *pinstance; |
2942 | struct pmcraid_resource_entry *res; |
2943 | |
2944 | pinstance = (struct pmcraid_instance *)cmd->drv_inst; |
2945 | res = cmd->scsi_cmd->device->hostdata; |
2946 | |
2947 | cancel_cmd = pmcraid_get_free_cmd(pinstance); |
2948 | |
2949 | if (cancel_cmd == NULL) { |
2950 | pmcraid_err("%s: no cmd blocks are available\n", __func__); |
2951 | return NULL; |
2952 | } |
2953 | |
2954 | pmcraid_prepare_cancel_cmd(cancel_cmd, cmd); |
2955 | |
2956 | pmcraid_info("aborting command CDB[0]= %x with index = %d\n", |
2957 | cmd->ioa_cb->ioarcb.cdb[0], |
2958 | cmd->ioa_cb->ioarcb.response_handle >> 2); |
2959 | |
2960 | init_completion(&cancel_cmd->wait_for_completion); |
2961 | cancel_cmd->completion_req = 1; |
2962 | |
2963 | pmcraid_info("command (%d) CDB[0] = %x for %x\n", |
2964 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2, |
2965 | cancel_cmd->ioa_cb->ioarcb.cdb[0], |
2966 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle)); |
2967 | |
2968 | pmcraid_send_cmd(cancel_cmd, |
2969 | pmcraid_internal_done, |
2970 | PMCRAID_INTERNAL_TIMEOUT, |
2971 | pmcraid_timeout_handler); |
2972 | return cancel_cmd; |
2973 | } |
2974 | |
2975 | /** |
2976 | * pmcraid_abort_complete - Waits for ABORT TASK completion |
2977 | * |
2978 | * @cancel_cmd: command block use as cancelling command |
2979 | * |
2980 | * Return Value: |
2981 | * returns SUCCESS if ABORT TASK has good completion |
2982 | * otherwise FAILED |
2983 | */ |
2984 | static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd) |
2985 | { |
2986 | struct pmcraid_resource_entry *res; |
2987 | u32 ioasc; |
2988 | |
2989 | wait_for_completion(&cancel_cmd->wait_for_completion); |
2990 | res = cancel_cmd->res; |
2991 | cancel_cmd->res = NULL; |
2992 | ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc); |
2993 | |
2994 | /* If the abort task is not timed out we will get a Good completion |
2995 | * as sense_key, otherwise we may get one the following responses |
2996 | * due to subsequent bus reset or device reset. In case IOASC is |
2997 | * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource |
2998 | */ |
2999 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || |
3000 | ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) { |
3001 | if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) |
3002 | res->sync_reqd = 1; |
3003 | ioasc = 0; |
3004 | } |
3005 | |
3006 | /* complete the command here itself */ |
3007 | pmcraid_return_cmd(cancel_cmd); |
3008 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; |
3009 | } |
3010 | |
3011 | /** |
3012 | * pmcraid_eh_abort_handler - entry point for aborting a single task on errors |
3013 | * |
3014 | * @scsi_cmd: scsi command struct given by mid-layer. When this is called |
3015 | * mid-layer ensures that no other commands are queued. This |
3016 | * never gets called under interrupt, but a separate eh thread. |
3017 | * |
3018 | * Return value: |
3019 | * SUCCESS / FAILED |
3020 | */ |
3021 | static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd) |
3022 | { |
3023 | struct pmcraid_instance *pinstance; |
3024 | struct pmcraid_cmd *cmd; |
3025 | struct pmcraid_resource_entry *res; |
3026 | unsigned long host_lock_flags; |
3027 | unsigned long pending_lock_flags; |
3028 | struct pmcraid_cmd *cancel_cmd = NULL; |
3029 | int cmd_found = 0; |
3030 | int rc = FAILED; |
3031 | |
3032 | pinstance = |
3033 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
3034 | |
3035 | scmd_printk(KERN_INFO, scsi_cmd, |
3036 | "I/O command timed out, aborting it.\n"); |
3037 | |
3038 | res = scsi_cmd->device->hostdata; |
3039 | |
3040 | if (res == NULL) |
3041 | return rc; |
3042 | |
3043 | /* If we are currently going through reset/reload, return failed. |
3044 | * This will force the mid-layer to eventually call |
3045 | * pmcraid_eh_host_reset which will then go to sleep and wait for the |
3046 | * reset to complete |
3047 | */ |
3048 | spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags); |
3049 | |
3050 | if (pinstance->ioa_reset_in_progress || |
3051 | pinstance->ioa_state == IOA_STATE_DEAD) { |
3052 | spin_unlock_irqrestore(pinstance->host->host_lock, |
3053 | host_lock_flags); |
3054 | return rc; |
3055 | } |
3056 | |
3057 | /* loop over pending cmd list to find cmd corresponding to this |
3058 | * scsi_cmd. Note that this command might not have been completed |
3059 | * already. locking: all pending commands are protected with |
3060 | * pending_pool_lock. |
3061 | */ |
3062 | spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags); |
3063 | list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) { |
3064 | |
3065 | if (cmd->scsi_cmd == scsi_cmd) { |
3066 | cmd_found = 1; |
3067 | break; |
3068 | } |
3069 | } |
3070 | |
3071 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
3072 | pending_lock_flags); |
3073 | |
3074 | /* If the command to be aborted was given to IOA and still pending with |
3075 | * it, send ABORT_TASK to abort this and wait for its completion |
3076 | */ |
3077 | if (cmd_found) |
3078 | cancel_cmd = pmcraid_abort_cmd(cmd); |
3079 | |
3080 | spin_unlock_irqrestore(pinstance->host->host_lock, |
3081 | host_lock_flags); |
3082 | |
3083 | if (cancel_cmd) { |
3084 | cancel_cmd->res = cmd->scsi_cmd->device->hostdata; |
3085 | rc = pmcraid_abort_complete(cancel_cmd); |
3086 | } |
3087 | |
3088 | return cmd_found ? rc : SUCCESS; |
3089 | } |
3090 | |
3091 | /** |
3092 | * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks |
3093 | * |
3094 | * @scmd: pointer to scsi_cmd that was sent to the resource to be reset. |
3095 | * |
3096 | * All these routines invokve pmcraid_reset_device with appropriate parameters. |
3097 | * Since these are called from mid-layer EH thread, no other IO will be queued |
3098 | * to the resource being reset. However, control path (IOCTL) may be active so |
3099 | * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device |
3100 | * takes care by locking/unlocking host_lock. |
3101 | * |
3102 | * Return value |
3103 | * SUCCESS or FAILED |
3104 | */ |
3105 | static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd) |
3106 | { |
3107 | scmd_printk(KERN_INFO, scmd, |
3108 | "resetting device due to an I/O command timeout.\n"); |
3109 | return pmcraid_reset_device(scmd, |
3110 | PMCRAID_INTERNAL_TIMEOUT, |
3111 | RESET_DEVICE_LUN); |
3112 | } |
3113 | |
3114 | static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd) |
3115 | { |
3116 | scmd_printk(KERN_INFO, scmd, |
3117 | "Doing bus reset due to an I/O command timeout.\n"); |
3118 | return pmcraid_reset_device(scmd, |
3119 | PMCRAID_RESET_BUS_TIMEOUT, |
3120 | RESET_DEVICE_BUS); |
3121 | } |
3122 | |
3123 | static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd) |
3124 | { |
3125 | scmd_printk(KERN_INFO, scmd, |
3126 | "Doing target reset due to an I/O command timeout.\n"); |
3127 | return pmcraid_reset_device(scmd, |
3128 | PMCRAID_INTERNAL_TIMEOUT, |
3129 | RESET_DEVICE_TARGET); |
3130 | } |
3131 | |
3132 | /** |
3133 | * pmcraid_eh_host_reset_handler - adapter reset handler callback |
3134 | * |
3135 | * @scmd: pointer to scsi_cmd that was sent to a resource of adapter |
3136 | * |
3137 | * Initiates adapter reset to bring it up to operational state |
3138 | * |
3139 | * Return value |
3140 | * SUCCESS or FAILED |
3141 | */ |
3142 | static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd) |
3143 | { |
3144 | unsigned long interval = 10000; /* 10 seconds interval */ |
3145 | int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval; |
3146 | struct pmcraid_instance *pinstance = |
3147 | (struct pmcraid_instance *)(scmd->device->host->hostdata); |
3148 | |
3149 | |
3150 | /* wait for an additional 150 seconds just in case firmware could come |
3151 | * up and if it could complete all the pending commands excluding the |
3152 | * two HCAM (CCN and LDN). |
3153 | */ |
3154 | while (waits--) { |
3155 | if (atomic_read(&pinstance->outstanding_cmds) <= |
3156 | PMCRAID_MAX_HCAM_CMD) |
3157 | return SUCCESS; |
3158 | msleep(interval); |
3159 | } |
3160 | |
3161 | dev_err(&pinstance->pdev->dev, |
3162 | "Adapter being reset due to an I/O command timeout.\n"); |
3163 | return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED; |
3164 | } |
3165 | |
3166 | /** |
3167 | * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes |
3168 | * @scsi_cmd: scsi command struct |
3169 | * |
3170 | * Return value |
3171 | * number of tags or 0 if the task is not tagged |
3172 | */ |
3173 | static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd) |
3174 | { |
3175 | char tag[2]; |
3176 | u8 rc = 0; |
3177 | |
3178 | if (scsi_populate_tag_msg(scsi_cmd, tag)) { |
3179 | switch (tag[0]) { |
3180 | case MSG_SIMPLE_TAG: |
3181 | rc = TASK_TAG_SIMPLE; |
3182 | break; |
3183 | case MSG_HEAD_TAG: |
3184 | rc = TASK_TAG_QUEUE_HEAD; |
3185 | break; |
3186 | case MSG_ORDERED_TAG: |
3187 | rc = TASK_TAG_ORDERED; |
3188 | break; |
3189 | }; |
3190 | } |
3191 | |
3192 | return rc; |
3193 | } |
3194 | |
3195 | |
3196 | /** |
3197 | * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB |
3198 | * @cmd: pmcraid command struct |
3199 | * @sgcount: count of scatter-gather elements |
3200 | * |
3201 | * Return value |
3202 | * returns pointer pmcraid_ioadl_desc, initialized to point to internal |
3203 | * or external IOADLs |
3204 | */ |
3205 | struct pmcraid_ioadl_desc * |
3206 | pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount) |
3207 | { |
3208 | struct pmcraid_ioadl_desc *ioadl; |
3209 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
3210 | int ioadl_count = 0; |
3211 | |
3212 | if (ioarcb->add_cmd_param_length) |
3213 | ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16); |
3214 | ioarcb->ioadl_length = |
3215 | sizeof(struct pmcraid_ioadl_desc) * sgcount; |
3216 | |
3217 | if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) { |
3218 | /* external ioadls start at offset 0x80 from control_block |
3219 | * structure, re-using 24 out of 27 ioadls part of IOARCB. |
3220 | * It is necessary to indicate to firmware that driver is |
3221 | * using ioadls to be treated as external to IOARCB. |
3222 | */ |
3223 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
3224 | ioarcb->ioadl_bus_addr = |
3225 | cpu_to_le64((cmd->ioa_cb_bus_addr) + |
3226 | offsetof(struct pmcraid_ioarcb, |
3227 | add_data.u.ioadl[3])); |
3228 | ioadl = &ioarcb->add_data.u.ioadl[3]; |
3229 | } else { |
3230 | ioarcb->ioadl_bus_addr = |
3231 | cpu_to_le64((cmd->ioa_cb_bus_addr) + |
3232 | offsetof(struct pmcraid_ioarcb, |
3233 | add_data.u.ioadl[ioadl_count])); |
3234 | |
3235 | ioadl = &ioarcb->add_data.u.ioadl[ioadl_count]; |
3236 | ioarcb->ioarcb_bus_addr |= |
3237 | DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8); |
3238 | } |
3239 | |
3240 | return ioadl; |
3241 | } |
3242 | |
3243 | /** |
3244 | * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer |
3245 | * @pinstance: pointer to adapter instance structure |
3246 | * @cmd: pmcraid command struct |
3247 | * |
3248 | * This function is invoked by queuecommand entry point while sending a command |
3249 | * to firmware. This builds ioadl descriptors and sets up ioarcb fields. |
3250 | * |
3251 | * Return value: |
3252 | * 0 on success or -1 on failure |
3253 | */ |
3254 | static int pmcraid_build_ioadl( |
3255 | struct pmcraid_instance *pinstance, |
3256 | struct pmcraid_cmd *cmd |
3257 | ) |
3258 | { |
3259 | int i, nseg; |
3260 | struct scatterlist *sglist; |
3261 | |
3262 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
3263 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); |
3264 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
3265 | |
3266 | u32 length = scsi_bufflen(scsi_cmd); |
3267 | |
3268 | if (!length) |
3269 | return 0; |
3270 | |
3271 | nseg = scsi_dma_map(scsi_cmd); |
3272 | |
3273 | if (nseg < 0) { |
3274 | scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n"); |
3275 | return -1; |
3276 | } else if (nseg > PMCRAID_MAX_IOADLS) { |
3277 | scsi_dma_unmap(scsi_cmd); |
3278 | scmd_printk(KERN_ERR, scsi_cmd, |
3279 | "sg count is (%d) more than allowed!\n", nseg); |
3280 | return -1; |
3281 | } |
3282 | |
3283 | /* Initialize IOARCB data transfer length fields */ |
3284 | if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) |
3285 | ioarcb->request_flags0 |= TRANSFER_DIR_WRITE; |
3286 | |
3287 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
3288 | ioarcb->data_transfer_length = cpu_to_le32(length); |
3289 | ioadl = pmcraid_init_ioadls(cmd, nseg); |
3290 | |
3291 | /* Initialize IOADL descriptor addresses */ |
3292 | scsi_for_each_sg(scsi_cmd, sglist, nseg, i) { |
3293 | ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist)); |
3294 | ioadl[i].address = cpu_to_le64(sg_dma_address(sglist)); |
3295 | ioadl[i].flags = 0; |
3296 | } |
3297 | /* setup last descriptor */ |
3298 | ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC; |
3299 | |
3300 | return 0; |
3301 | } |
3302 | |
3303 | /** |
3304 | * pmcraid_free_sglist - Frees an allocated SG buffer list |
3305 | * @sglist: scatter/gather list pointer |
3306 | * |
3307 | * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist |
3308 | * |
3309 | * Return value: |
3310 | * none |
3311 | */ |
3312 | static void pmcraid_free_sglist(struct pmcraid_sglist *sglist) |
3313 | { |
3314 | int i; |
3315 | |
3316 | for (i = 0; i < sglist->num_sg; i++) |
3317 | __free_pages(sg_page(&(sglist->scatterlist[i])), |
3318 | sglist->order); |
3319 | |
3320 | kfree(sglist); |
3321 | } |
3322 | |
3323 | /** |
3324 | * pmcraid_alloc_sglist - Allocates memory for a SG list |
3325 | * @buflen: buffer length |
3326 | * |
3327 | * Allocates a DMA'able buffer in chunks and assembles a scatter/gather |
3328 | * list. |
3329 | * |
3330 | * Return value |
3331 | * pointer to sglist / NULL on failure |
3332 | */ |
3333 | static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen) |
3334 | { |
3335 | struct pmcraid_sglist *sglist; |
3336 | struct scatterlist *scatterlist; |
3337 | struct page *page; |
3338 | int num_elem, i, j; |
3339 | int sg_size; |
3340 | int order; |
3341 | int bsize_elem; |
3342 | |
3343 | sg_size = buflen / (PMCRAID_MAX_IOADLS - 1); |
3344 | order = (sg_size > 0) ? get_order(sg_size) : 0; |
3345 | bsize_elem = PAGE_SIZE * (1 << order); |
3346 | |
3347 | /* Determine the actual number of sg entries needed */ |
3348 | if (buflen % bsize_elem) |
3349 | num_elem = (buflen / bsize_elem) + 1; |
3350 | else |
3351 | num_elem = buflen / bsize_elem; |
3352 | |
3353 | /* Allocate a scatter/gather list for the DMA */ |
3354 | sglist = kzalloc(sizeof(struct pmcraid_sglist) + |
3355 | (sizeof(struct scatterlist) * (num_elem - 1)), |
3356 | GFP_KERNEL); |
3357 | |
3358 | if (sglist == NULL) |
3359 | return NULL; |
3360 | |
3361 | scatterlist = sglist->scatterlist; |
3362 | sg_init_table(scatterlist, num_elem); |
3363 | sglist->order = order; |
3364 | sglist->num_sg = num_elem; |
3365 | sg_size = buflen; |
3366 | |
3367 | for (i = 0; i < num_elem; i++) { |
3368 | page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order); |
3369 | if (!page) { |
3370 | for (j = i - 1; j >= 0; j--) |
3371 | __free_pages(sg_page(&scatterlist[j]), order); |
3372 | kfree(sglist); |
3373 | return NULL; |
3374 | } |
3375 | |
3376 | sg_set_page(&scatterlist[i], page, |
3377 | sg_size < bsize_elem ? sg_size : bsize_elem, 0); |
3378 | sg_size -= bsize_elem; |
3379 | } |
3380 | |
3381 | return sglist; |
3382 | } |
3383 | |
3384 | /** |
3385 | * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list |
3386 | * @sglist: scatter/gather list pointer |
3387 | * @buffer: buffer pointer |
3388 | * @len: buffer length |
3389 | * @direction: data transfer direction |
3390 | * |
3391 | * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist |
3392 | * |
3393 | * Return value: |
3394 | * 0 on success / other on failure |
3395 | */ |
3396 | static int pmcraid_copy_sglist( |
3397 | struct pmcraid_sglist *sglist, |
3398 | unsigned long buffer, |
3399 | u32 len, |
3400 | int direction |
3401 | ) |
3402 | { |
3403 | struct scatterlist *scatterlist; |
3404 | void *kaddr; |
3405 | int bsize_elem; |
3406 | int i; |
3407 | int rc = 0; |
3408 | |
3409 | /* Determine the actual number of bytes per element */ |
3410 | bsize_elem = PAGE_SIZE * (1 << sglist->order); |
3411 | |
3412 | scatterlist = sglist->scatterlist; |
3413 | |
3414 | for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) { |
3415 | struct page *page = sg_page(&scatterlist[i]); |
3416 | |
3417 | kaddr = kmap(page); |
3418 | if (direction == DMA_TO_DEVICE) |
3419 | rc = __copy_from_user(kaddr, |
3420 | (void *)buffer, |
3421 | bsize_elem); |
3422 | else |
3423 | rc = __copy_to_user((void *)buffer, kaddr, bsize_elem); |
3424 | |
3425 | kunmap(page); |
3426 | |
3427 | if (rc) { |
3428 | pmcraid_err("failed to copy user data into sg list\n"); |
3429 | return -EFAULT; |
3430 | } |
3431 | |
3432 | scatterlist[i].length = bsize_elem; |
3433 | } |
3434 | |
3435 | if (len % bsize_elem) { |
3436 | struct page *page = sg_page(&scatterlist[i]); |
3437 | |
3438 | kaddr = kmap(page); |
3439 | |
3440 | if (direction == DMA_TO_DEVICE) |
3441 | rc = __copy_from_user(kaddr, |
3442 | (void *)buffer, |
3443 | len % bsize_elem); |
3444 | else |
3445 | rc = __copy_to_user((void *)buffer, |
3446 | kaddr, |
3447 | len % bsize_elem); |
3448 | |
3449 | kunmap(page); |
3450 | |
3451 | scatterlist[i].length = len % bsize_elem; |
3452 | } |
3453 | |
3454 | if (rc) { |
3455 | pmcraid_err("failed to copy user data into sg list\n"); |
3456 | rc = -EFAULT; |
3457 | } |
3458 | |
3459 | return rc; |
3460 | } |
3461 | |
3462 | /** |
3463 | * pmcraid_queuecommand - Queue a mid-layer request |
3464 | * @scsi_cmd: scsi command struct |
3465 | * @done: done function |
3466 | * |
3467 | * This function queues a request generated by the mid-layer. Midlayer calls |
3468 | * this routine within host->lock. Some of the functions called by queuecommand |
3469 | * would use cmd block queue locks (free_pool_lock and pending_pool_lock) |
3470 | * |
3471 | * Return value: |
3472 | * 0 on success |
3473 | * SCSI_MLQUEUE_DEVICE_BUSY if device is busy |
3474 | * SCSI_MLQUEUE_HOST_BUSY if host is busy |
3475 | */ |
3476 | static int pmcraid_queuecommand_lck( |
3477 | struct scsi_cmnd *scsi_cmd, |
3478 | void (*done) (struct scsi_cmnd *) |
3479 | ) |
3480 | { |
3481 | struct pmcraid_instance *pinstance; |
3482 | struct pmcraid_resource_entry *res; |
3483 | struct pmcraid_ioarcb *ioarcb; |
3484 | struct pmcraid_cmd *cmd; |
3485 | u32 fw_version; |
3486 | int rc = 0; |
3487 | |
3488 | pinstance = |
3489 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
3490 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
3491 | scsi_cmd->scsi_done = done; |
3492 | res = scsi_cmd->device->hostdata; |
3493 | scsi_cmd->result = (DID_OK << 16); |
3494 | |
3495 | /* if adapter is marked as dead, set result to DID_NO_CONNECT complete |
3496 | * the command |
3497 | */ |
3498 | if (pinstance->ioa_state == IOA_STATE_DEAD) { |
3499 | pmcraid_info("IOA is dead, but queuecommand is scheduled\n"); |
3500 | scsi_cmd->result = (DID_NO_CONNECT << 16); |
3501 | scsi_cmd->scsi_done(scsi_cmd); |
3502 | return 0; |
3503 | } |
3504 | |
3505 | /* If IOA reset is in progress, can't queue the commands */ |
3506 | if (pinstance->ioa_reset_in_progress) |
3507 | return SCSI_MLQUEUE_HOST_BUSY; |
3508 | |
3509 | /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete |
3510 | * the command here itself with success return |
3511 | */ |
3512 | if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) { |
3513 | pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n"); |
3514 | scsi_cmd->scsi_done(scsi_cmd); |
3515 | return 0; |
3516 | } |
3517 | |
3518 | /* initialize the command and IOARCB to be sent to IOA */ |
3519 | cmd = pmcraid_get_free_cmd(pinstance); |
3520 | |
3521 | if (cmd == NULL) { |
3522 | pmcraid_err("free command block is not available\n"); |
3523 | return SCSI_MLQUEUE_HOST_BUSY; |
3524 | } |
3525 | |
3526 | cmd->scsi_cmd = scsi_cmd; |
3527 | ioarcb = &(cmd->ioa_cb->ioarcb); |
3528 | memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len); |
3529 | ioarcb->resource_handle = res->cfg_entry.resource_handle; |
3530 | ioarcb->request_type = REQ_TYPE_SCSI; |
3531 | |
3532 | /* set hrrq number where the IOA should respond to. Note that all cmds |
3533 | * generated internally uses hrrq_id 0, exception to this is the cmd |
3534 | * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses |
3535 | * hrrq_id assigned here in queuecommand |
3536 | */ |
3537 | ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) % |
3538 | pinstance->num_hrrq; |
3539 | cmd->cmd_done = pmcraid_io_done; |
3540 | |
3541 | if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) { |
3542 | if (scsi_cmd->underflow == 0) |
3543 | ioarcb->request_flags0 |= INHIBIT_UL_CHECK; |
3544 | |
3545 | if (res->sync_reqd) { |
3546 | ioarcb->request_flags0 |= SYNC_COMPLETE; |
3547 | res->sync_reqd = 0; |
3548 | } |
3549 | |
3550 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
3551 | ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd); |
3552 | |
3553 | if (RES_IS_GSCSI(res->cfg_entry)) |
3554 | ioarcb->request_flags1 |= DELAY_AFTER_RESET; |
3555 | } |
3556 | |
3557 | rc = pmcraid_build_ioadl(pinstance, cmd); |
3558 | |
3559 | pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n", |
3560 | le32_to_cpu(ioarcb->response_handle) >> 2, |
3561 | scsi_cmd->cmnd[0], pinstance->host->unique_id, |
3562 | RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID : |
3563 | PMCRAID_PHYS_BUS_ID, |
3564 | RES_IS_VSET(res->cfg_entry) ? |
3565 | (fw_version <= PMCRAID_FW_VERSION_1 ? |
3566 | res->cfg_entry.unique_flags1 : |
3567 | res->cfg_entry.array_id & 0xFF) : |
3568 | RES_TARGET(res->cfg_entry.resource_address), |
3569 | RES_LUN(res->cfg_entry.resource_address)); |
3570 | |
3571 | if (likely(rc == 0)) { |
3572 | _pmcraid_fire_command(cmd); |
3573 | } else { |
3574 | pmcraid_err("queuecommand could not build ioadl\n"); |
3575 | pmcraid_return_cmd(cmd); |
3576 | rc = SCSI_MLQUEUE_HOST_BUSY; |
3577 | } |
3578 | |
3579 | return rc; |
3580 | } |
3581 | |
3582 | static DEF_SCSI_QCMD(pmcraid_queuecommand) |
3583 | |
3584 | /** |
3585 | * pmcraid_open -char node "open" entry, allowed only users with admin access |
3586 | */ |
3587 | static int pmcraid_chr_open(struct inode *inode, struct file *filep) |
3588 | { |
3589 | struct pmcraid_instance *pinstance; |
3590 | |
3591 | if (!capable(CAP_SYS_ADMIN)) |
3592 | return -EACCES; |
3593 | |
3594 | /* Populate adapter instance * pointer for use by ioctl */ |
3595 | pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev); |
3596 | filep->private_data = pinstance; |
3597 | |
3598 | return 0; |
3599 | } |
3600 | |
3601 | /** |
3602 | * pmcraid_fasync - Async notifier registration from applications |
3603 | * |
3604 | * This function adds the calling process to a driver global queue. When an |
3605 | * event occurs, SIGIO will be sent to all processes in this queue. |
3606 | */ |
3607 | static int pmcraid_chr_fasync(int fd, struct file *filep, int mode) |
3608 | { |
3609 | struct pmcraid_instance *pinstance; |
3610 | int rc; |
3611 | |
3612 | pinstance = filep->private_data; |
3613 | mutex_lock(&pinstance->aen_queue_lock); |
3614 | rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue); |
3615 | mutex_unlock(&pinstance->aen_queue_lock); |
3616 | |
3617 | return rc; |
3618 | } |
3619 | |
3620 | |
3621 | /** |
3622 | * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough |
3623 | * commands sent over IOCTL interface |
3624 | * |
3625 | * @cmd : pointer to struct pmcraid_cmd |
3626 | * @buflen : length of the request buffer |
3627 | * @direction : data transfer direction |
3628 | * |
3629 | * Return value |
3630 | * 0 on success, non-zero error code on failure |
3631 | */ |
3632 | static int pmcraid_build_passthrough_ioadls( |
3633 | struct pmcraid_cmd *cmd, |
3634 | int buflen, |
3635 | int direction |
3636 | ) |
3637 | { |
3638 | struct pmcraid_sglist *sglist = NULL; |
3639 | struct scatterlist *sg = NULL; |
3640 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
3641 | struct pmcraid_ioadl_desc *ioadl; |
3642 | int i; |
3643 | |
3644 | sglist = pmcraid_alloc_sglist(buflen); |
3645 | |
3646 | if (!sglist) { |
3647 | pmcraid_err("can't allocate memory for passthrough SGls\n"); |
3648 | return -ENOMEM; |
3649 | } |
3650 | |
3651 | sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev, |
3652 | sglist->scatterlist, |
3653 | sglist->num_sg, direction); |
3654 | |
3655 | if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) { |
3656 | dev_err(&cmd->drv_inst->pdev->dev, |
3657 | "Failed to map passthrough buffer!\n"); |
3658 | pmcraid_free_sglist(sglist); |
3659 | return -EIO; |
3660 | } |
3661 | |
3662 | cmd->sglist = sglist; |
3663 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
3664 | |
3665 | ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg); |
3666 | |
3667 | /* Initialize IOADL descriptor addresses */ |
3668 | for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) { |
3669 | ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg)); |
3670 | ioadl[i].address = cpu_to_le64(sg_dma_address(sg)); |
3671 | ioadl[i].flags = 0; |
3672 | } |
3673 | |
3674 | /* setup the last descriptor */ |
3675 | ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC; |
3676 | |
3677 | return 0; |
3678 | } |
3679 | |
3680 | |
3681 | /** |
3682 | * pmcraid_release_passthrough_ioadls - release passthrough ioadls |
3683 | * |
3684 | * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated |
3685 | * @buflen: size of the request buffer |
3686 | * @direction: data transfer direction |
3687 | * |
3688 | * Return value |
3689 | * 0 on success, non-zero error code on failure |
3690 | */ |
3691 | static void pmcraid_release_passthrough_ioadls( |
3692 | struct pmcraid_cmd *cmd, |
3693 | int buflen, |
3694 | int direction |
3695 | ) |
3696 | { |
3697 | struct pmcraid_sglist *sglist = cmd->sglist; |
3698 | |
3699 | if (buflen > 0) { |
3700 | pci_unmap_sg(cmd->drv_inst->pdev, |
3701 | sglist->scatterlist, |
3702 | sglist->num_sg, |
3703 | direction); |
3704 | pmcraid_free_sglist(sglist); |
3705 | cmd->sglist = NULL; |
3706 | } |
3707 | } |
3708 | |
3709 | /** |
3710 | * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands |
3711 | * |
3712 | * @pinstance: pointer to adapter instance structure |
3713 | * @cmd: ioctl code |
3714 | * @arg: pointer to pmcraid_passthrough_buffer user buffer |
3715 | * |
3716 | * Return value |
3717 | * 0 on success, non-zero error code on failure |
3718 | */ |
3719 | static long pmcraid_ioctl_passthrough( |
3720 | struct pmcraid_instance *pinstance, |
3721 | unsigned int ioctl_cmd, |
3722 | unsigned int buflen, |
3723 | unsigned long arg |
3724 | ) |
3725 | { |
3726 | struct pmcraid_passthrough_ioctl_buffer *buffer; |
3727 | struct pmcraid_ioarcb *ioarcb; |
3728 | struct pmcraid_cmd *cmd; |
3729 | struct pmcraid_cmd *cancel_cmd; |
3730 | unsigned long request_buffer; |
3731 | unsigned long request_offset; |
3732 | unsigned long lock_flags; |
3733 | void *ioasa; |
3734 | u32 ioasc; |
3735 | int request_size; |
3736 | int buffer_size; |
3737 | u8 access, direction; |
3738 | int rc = 0; |
3739 | |
3740 | /* If IOA reset is in progress, wait 10 secs for reset to complete */ |
3741 | if (pinstance->ioa_reset_in_progress) { |
3742 | rc = wait_event_interruptible_timeout( |
3743 | pinstance->reset_wait_q, |
3744 | !pinstance->ioa_reset_in_progress, |
3745 | msecs_to_jiffies(10000)); |
3746 | |
3747 | if (!rc) |
3748 | return -ETIMEDOUT; |
3749 | else if (rc < 0) |
3750 | return -ERESTARTSYS; |
3751 | } |
3752 | |
3753 | /* If adapter is not in operational state, return error */ |
3754 | if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) { |
3755 | pmcraid_err("IOA is not operational\n"); |
3756 | return -ENOTTY; |
3757 | } |
3758 | |
3759 | buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer); |
3760 | buffer = kmalloc(buffer_size, GFP_KERNEL); |
3761 | |
3762 | if (!buffer) { |
3763 | pmcraid_err("no memory for passthrough buffer\n"); |
3764 | return -ENOMEM; |
3765 | } |
3766 | |
3767 | request_offset = |
3768 | offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer); |
3769 | |
3770 | request_buffer = arg + request_offset; |
3771 | |
3772 | rc = __copy_from_user(buffer, |
3773 | (struct pmcraid_passthrough_ioctl_buffer *) arg, |
3774 | sizeof(struct pmcraid_passthrough_ioctl_buffer)); |
3775 | |
3776 | ioasa = |
3777 | (void *)(arg + |
3778 | offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa)); |
3779 | |
3780 | if (rc) { |
3781 | pmcraid_err("ioctl: can't copy passthrough buffer\n"); |
3782 | rc = -EFAULT; |
3783 | goto out_free_buffer; |
3784 | } |
3785 | |
3786 | request_size = buffer->ioarcb.data_transfer_length; |
3787 | |
3788 | if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) { |
3789 | access = VERIFY_READ; |
3790 | direction = DMA_TO_DEVICE; |
3791 | } else { |
3792 | access = VERIFY_WRITE; |
3793 | direction = DMA_FROM_DEVICE; |
3794 | } |
3795 | |
3796 | if (request_size > 0) { |
3797 | rc = access_ok(access, arg, request_offset + request_size); |
3798 | |
3799 | if (!rc) { |
3800 | rc = -EFAULT; |
3801 | goto out_free_buffer; |
3802 | } |
3803 | } else if (request_size < 0) { |
3804 | rc = -EINVAL; |
3805 | goto out_free_buffer; |
3806 | } |
3807 | |
3808 | /* check if we have any additional command parameters */ |
3809 | if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) { |
3810 | rc = -EINVAL; |
3811 | goto out_free_buffer; |
3812 | } |
3813 | |
3814 | cmd = pmcraid_get_free_cmd(pinstance); |
3815 | |
3816 | if (!cmd) { |
3817 | pmcraid_err("free command block is not available\n"); |
3818 | rc = -ENOMEM; |
3819 | goto out_free_buffer; |
3820 | } |
3821 | |
3822 | cmd->scsi_cmd = NULL; |
3823 | ioarcb = &(cmd->ioa_cb->ioarcb); |
3824 | |
3825 | /* Copy the user-provided IOARCB stuff field by field */ |
3826 | ioarcb->resource_handle = buffer->ioarcb.resource_handle; |
3827 | ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length; |
3828 | ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout; |
3829 | ioarcb->request_type = buffer->ioarcb.request_type; |
3830 | ioarcb->request_flags0 = buffer->ioarcb.request_flags0; |
3831 | ioarcb->request_flags1 = buffer->ioarcb.request_flags1; |
3832 | memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN); |
3833 | |
3834 | if (buffer->ioarcb.add_cmd_param_length) { |
3835 | ioarcb->add_cmd_param_length = |
3836 | buffer->ioarcb.add_cmd_param_length; |
3837 | ioarcb->add_cmd_param_offset = |
3838 | buffer->ioarcb.add_cmd_param_offset; |
3839 | memcpy(ioarcb->add_data.u.add_cmd_params, |
3840 | buffer->ioarcb.add_data.u.add_cmd_params, |
3841 | buffer->ioarcb.add_cmd_param_length); |
3842 | } |
3843 | |
3844 | /* set hrrq number where the IOA should respond to. Note that all cmds |
3845 | * generated internally uses hrrq_id 0, exception to this is the cmd |
3846 | * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses |
3847 | * hrrq_id assigned here in queuecommand |
3848 | */ |
3849 | ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) % |
3850 | pinstance->num_hrrq; |
3851 | |
3852 | if (request_size) { |
3853 | rc = pmcraid_build_passthrough_ioadls(cmd, |
3854 | request_size, |
3855 | direction); |
3856 | if (rc) { |
3857 | pmcraid_err("couldn't build passthrough ioadls\n"); |
3858 | goto out_free_buffer; |
3859 | } |
3860 | } else if (request_size < 0) { |
3861 | rc = -EINVAL; |
3862 | goto out_free_buffer; |
3863 | } |
3864 | |
3865 | /* If data is being written into the device, copy the data from user |
3866 | * buffers |
3867 | */ |
3868 | if (direction == DMA_TO_DEVICE && request_size > 0) { |
3869 | rc = pmcraid_copy_sglist(cmd->sglist, |
3870 | request_buffer, |
3871 | request_size, |
3872 | direction); |
3873 | if (rc) { |
3874 | pmcraid_err("failed to copy user buffer\n"); |
3875 | goto out_free_sglist; |
3876 | } |
3877 | } |
3878 | |
3879 | /* passthrough ioctl is a blocking command so, put the user to sleep |
3880 | * until timeout. Note that a timeout value of 0 means, do timeout. |
3881 | */ |
3882 | cmd->cmd_done = pmcraid_internal_done; |
3883 | init_completion(&cmd->wait_for_completion); |
3884 | cmd->completion_req = 1; |
3885 | |
3886 | pmcraid_info("command(%d) (CDB[0] = %x) for %x\n", |
3887 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2, |
3888 | cmd->ioa_cb->ioarcb.cdb[0], |
3889 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle)); |
3890 | |
3891 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
3892 | _pmcraid_fire_command(cmd); |
3893 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
3894 | |
3895 | /* NOTE ! Remove the below line once abort_task is implemented |
3896 | * in firmware. This line disables ioctl command timeout handling logic |
3897 | * similar to IO command timeout handling, making ioctl commands to wait |
3898 | * until the command completion regardless of timeout value specified in |
3899 | * ioarcb |
3900 | */ |
3901 | buffer->ioarcb.cmd_timeout = 0; |
3902 | |
3903 | /* If command timeout is specified put caller to wait till that time, |
3904 | * otherwise it would be blocking wait. If command gets timed out, it |
3905 | * will be aborted. |
3906 | */ |
3907 | if (buffer->ioarcb.cmd_timeout == 0) { |
3908 | wait_for_completion(&cmd->wait_for_completion); |
3909 | } else if (!wait_for_completion_timeout( |
3910 | &cmd->wait_for_completion, |
3911 | msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) { |
3912 | |
3913 | pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n", |
3914 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2), |
3915 | cmd->ioa_cb->ioarcb.cdb[0]); |
3916 | |
3917 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
3918 | cancel_cmd = pmcraid_abort_cmd(cmd); |
3919 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
3920 | |
3921 | if (cancel_cmd) { |
3922 | wait_for_completion(&cancel_cmd->wait_for_completion); |
3923 | ioasc = cancel_cmd->ioa_cb->ioasa.ioasc; |
3924 | pmcraid_return_cmd(cancel_cmd); |
3925 | |
3926 | /* if abort task couldn't find the command i.e it got |
3927 | * completed prior to aborting, return good completion. |
3928 | * if command got aborted successfully or there was IOA |
3929 | * reset due to abort task itself getting timedout then |
3930 | * return -ETIMEDOUT |
3931 | */ |
3932 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
3933 | PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) { |
3934 | if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND) |
3935 | rc = -ETIMEDOUT; |
3936 | goto out_handle_response; |
3937 | } |
3938 | } |
3939 | |
3940 | /* no command block for abort task or abort task failed to abort |
3941 | * the IOARCB, then wait for 150 more seconds and initiate reset |
3942 | * sequence after timeout |
3943 | */ |
3944 | if (!wait_for_completion_timeout( |
3945 | &cmd->wait_for_completion, |
3946 | msecs_to_jiffies(150 * 1000))) { |
3947 | pmcraid_reset_bringup(cmd->drv_inst); |
3948 | rc = -ETIMEDOUT; |
3949 | } |
3950 | } |
3951 | |
3952 | out_handle_response: |
3953 | /* copy entire IOASA buffer and return IOCTL success. |
3954 | * If copying IOASA to user-buffer fails, return |
3955 | * EFAULT |
3956 | */ |
3957 | if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa, |
3958 | sizeof(struct pmcraid_ioasa))) { |
3959 | pmcraid_err("failed to copy ioasa buffer to user\n"); |
3960 | rc = -EFAULT; |
3961 | } |
3962 | |
3963 | /* If the data transfer was from device, copy the data onto user |
3964 | * buffers |
3965 | */ |
3966 | else if (direction == DMA_FROM_DEVICE && request_size > 0) { |
3967 | rc = pmcraid_copy_sglist(cmd->sglist, |
3968 | request_buffer, |
3969 | request_size, |
3970 | direction); |
3971 | if (rc) { |
3972 | pmcraid_err("failed to copy user buffer\n"); |
3973 | rc = -EFAULT; |
3974 | } |
3975 | } |
3976 | |
3977 | out_free_sglist: |
3978 | pmcraid_release_passthrough_ioadls(cmd, request_size, direction); |
3979 | pmcraid_return_cmd(cmd); |
3980 | |
3981 | out_free_buffer: |
3982 | kfree(buffer); |
3983 | |
3984 | return rc; |
3985 | } |
3986 | |
3987 | |
3988 | |
3989 | |
3990 | /** |
3991 | * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself |
3992 | * |
3993 | * @pinstance: pointer to adapter instance structure |
3994 | * @cmd: ioctl command passed in |
3995 | * @buflen: length of user_buffer |
3996 | * @user_buffer: user buffer pointer |
3997 | * |
3998 | * Return Value |
3999 | * 0 in case of success, otherwise appropriate error code |
4000 | */ |
4001 | static long pmcraid_ioctl_driver( |
4002 | struct pmcraid_instance *pinstance, |
4003 | unsigned int cmd, |
4004 | unsigned int buflen, |
4005 | void __user *user_buffer |
4006 | ) |
4007 | { |
4008 | int rc = -ENOSYS; |
4009 | |
4010 | if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) { |
4011 | pmcraid_err("ioctl_driver: access fault in request buffer\n"); |
4012 | return -EFAULT; |
4013 | } |
4014 | |
4015 | switch (cmd) { |
4016 | case PMCRAID_IOCTL_RESET_ADAPTER: |
4017 | pmcraid_reset_bringup(pinstance); |
4018 | rc = 0; |
4019 | break; |
4020 | |
4021 | default: |
4022 | break; |
4023 | } |
4024 | |
4025 | return rc; |
4026 | } |
4027 | |
4028 | /** |
4029 | * pmcraid_check_ioctl_buffer - check for proper access to user buffer |
4030 | * |
4031 | * @cmd: ioctl command |
4032 | * @arg: user buffer |
4033 | * @hdr: pointer to kernel memory for pmcraid_ioctl_header |
4034 | * |
4035 | * Return Value |
4036 | * negetive error code if there are access issues, otherwise zero. |
4037 | * Upon success, returns ioctl header copied out of user buffer. |
4038 | */ |
4039 | |
4040 | static int pmcraid_check_ioctl_buffer( |
4041 | int cmd, |
4042 | void __user *arg, |
4043 | struct pmcraid_ioctl_header *hdr |
4044 | ) |
4045 | { |
4046 | int rc = 0; |
4047 | int access = VERIFY_READ; |
4048 | |
4049 | if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) { |
4050 | pmcraid_err("couldn't copy ioctl header from user buffer\n"); |
4051 | return -EFAULT; |
4052 | } |
4053 | |
4054 | /* check for valid driver signature */ |
4055 | rc = memcmp(hdr->signature, |
4056 | PMCRAID_IOCTL_SIGNATURE, |
4057 | sizeof(hdr->signature)); |
4058 | if (rc) { |
4059 | pmcraid_err("signature verification failed\n"); |
4060 | return -EINVAL; |
4061 | } |
4062 | |
4063 | /* check for appropriate buffer access */ |
4064 | if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ) |
4065 | access = VERIFY_WRITE; |
4066 | |
4067 | rc = access_ok(access, |
4068 | (arg + sizeof(struct pmcraid_ioctl_header)), |
4069 | hdr->buffer_length); |
4070 | if (!rc) { |
4071 | pmcraid_err("access failed for user buffer of size %d\n", |
4072 | hdr->buffer_length); |
4073 | return -EFAULT; |
4074 | } |
4075 | |
4076 | return 0; |
4077 | } |
4078 | |
4079 | /** |
4080 | * pmcraid_ioctl - char node ioctl entry point |
4081 | */ |
4082 | static long pmcraid_chr_ioctl( |
4083 | struct file *filep, |
4084 | unsigned int cmd, |
4085 | unsigned long arg |
4086 | ) |
4087 | { |
4088 | struct pmcraid_instance *pinstance = NULL; |
4089 | struct pmcraid_ioctl_header *hdr = NULL; |
4090 | int retval = -ENOTTY; |
4091 | |
4092 | hdr = kmalloc(sizeof(struct pmcraid_ioctl_header), GFP_KERNEL); |
4093 | |
4094 | if (!hdr) { |
4095 | pmcraid_err("failed to allocate memory for ioctl header\n"); |
4096 | return -ENOMEM; |
4097 | } |
4098 | |
4099 | retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr); |
4100 | |
4101 | if (retval) { |
4102 | pmcraid_info("chr_ioctl: header check failed\n"); |
4103 | kfree(hdr); |
4104 | return retval; |
4105 | } |
4106 | |
4107 | pinstance = filep->private_data; |
4108 | |
4109 | if (!pinstance) { |
4110 | pmcraid_info("adapter instance is not found\n"); |
4111 | kfree(hdr); |
4112 | return -ENOTTY; |
4113 | } |
4114 | |
4115 | switch (_IOC_TYPE(cmd)) { |
4116 | |
4117 | case PMCRAID_PASSTHROUGH_IOCTL: |
4118 | /* If ioctl code is to download microcode, we need to block |
4119 | * mid-layer requests. |
4120 | */ |
4121 | if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE) |
4122 | scsi_block_requests(pinstance->host); |
4123 | |
4124 | retval = pmcraid_ioctl_passthrough(pinstance, |
4125 | cmd, |
4126 | hdr->buffer_length, |
4127 | arg); |
4128 | |
4129 | if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE) |
4130 | scsi_unblock_requests(pinstance->host); |
4131 | break; |
4132 | |
4133 | case PMCRAID_DRIVER_IOCTL: |
4134 | arg += sizeof(struct pmcraid_ioctl_header); |
4135 | retval = pmcraid_ioctl_driver(pinstance, |
4136 | cmd, |
4137 | hdr->buffer_length, |
4138 | (void __user *)arg); |
4139 | break; |
4140 | |
4141 | default: |
4142 | retval = -ENOTTY; |
4143 | break; |
4144 | } |
4145 | |
4146 | kfree(hdr); |
4147 | |
4148 | return retval; |
4149 | } |
4150 | |
4151 | /** |
4152 | * File operations structure for management interface |
4153 | */ |
4154 | static const struct file_operations pmcraid_fops = { |
4155 | .owner = THIS_MODULE, |
4156 | .open = pmcraid_chr_open, |
4157 | .fasync = pmcraid_chr_fasync, |
4158 | .unlocked_ioctl = pmcraid_chr_ioctl, |
4159 | #ifdef CONFIG_COMPAT |
4160 | .compat_ioctl = pmcraid_chr_ioctl, |
4161 | #endif |
4162 | .llseek = noop_llseek, |
4163 | }; |
4164 | |
4165 | |
4166 | |
4167 | |
4168 | /** |
4169 | * pmcraid_show_log_level - Display adapter's error logging level |
4170 | * @dev: class device struct |
4171 | * @buf: buffer |
4172 | * |
4173 | * Return value: |
4174 | * number of bytes printed to buffer |
4175 | */ |
4176 | static ssize_t pmcraid_show_log_level( |
4177 | struct device *dev, |
4178 | struct device_attribute *attr, |
4179 | char *buf) |
4180 | { |
4181 | struct Scsi_Host *shost = class_to_shost(dev); |
4182 | struct pmcraid_instance *pinstance = |
4183 | (struct pmcraid_instance *)shost->hostdata; |
4184 | return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level); |
4185 | } |
4186 | |
4187 | /** |
4188 | * pmcraid_store_log_level - Change the adapter's error logging level |
4189 | * @dev: class device struct |
4190 | * @buf: buffer |
4191 | * @count: not used |
4192 | * |
4193 | * Return value: |
4194 | * number of bytes printed to buffer |
4195 | */ |
4196 | static ssize_t pmcraid_store_log_level( |
4197 | struct device *dev, |
4198 | struct device_attribute *attr, |
4199 | const char *buf, |
4200 | size_t count |
4201 | ) |
4202 | { |
4203 | struct Scsi_Host *shost; |
4204 | struct pmcraid_instance *pinstance; |
4205 | unsigned long val; |
4206 | |
4207 | if (strict_strtoul(buf, 10, &val)) |
4208 | return -EINVAL; |
4209 | /* log-level should be from 0 to 2 */ |
4210 | if (val > 2) |
4211 | return -EINVAL; |
4212 | |
4213 | shost = class_to_shost(dev); |
4214 | pinstance = (struct pmcraid_instance *)shost->hostdata; |
4215 | pinstance->current_log_level = val; |
4216 | |
4217 | return strlen(buf); |
4218 | } |
4219 | |
4220 | static struct device_attribute pmcraid_log_level_attr = { |
4221 | .attr = { |
4222 | .name = "log_level", |
4223 | .mode = S_IRUGO | S_IWUSR, |
4224 | }, |
4225 | .show = pmcraid_show_log_level, |
4226 | .store = pmcraid_store_log_level, |
4227 | }; |
4228 | |
4229 | /** |
4230 | * pmcraid_show_drv_version - Display driver version |
4231 | * @dev: class device struct |
4232 | * @buf: buffer |
4233 | * |
4234 | * Return value: |
4235 | * number of bytes printed to buffer |
4236 | */ |
4237 | static ssize_t pmcraid_show_drv_version( |
4238 | struct device *dev, |
4239 | struct device_attribute *attr, |
4240 | char *buf |
4241 | ) |
4242 | { |
4243 | return snprintf(buf, PAGE_SIZE, "version: %s\n", |
4244 | PMCRAID_DRIVER_VERSION); |
4245 | } |
4246 | |
4247 | static struct device_attribute pmcraid_driver_version_attr = { |
4248 | .attr = { |
4249 | .name = "drv_version", |
4250 | .mode = S_IRUGO, |
4251 | }, |
4252 | .show = pmcraid_show_drv_version, |
4253 | }; |
4254 | |
4255 | /** |
4256 | * pmcraid_show_io_adapter_id - Display driver assigned adapter id |
4257 | * @dev: class device struct |
4258 | * @buf: buffer |
4259 | * |
4260 | * Return value: |
4261 | * number of bytes printed to buffer |
4262 | */ |
4263 | static ssize_t pmcraid_show_adapter_id( |
4264 | struct device *dev, |
4265 | struct device_attribute *attr, |
4266 | char *buf |
4267 | ) |
4268 | { |
4269 | struct Scsi_Host *shost = class_to_shost(dev); |
4270 | struct pmcraid_instance *pinstance = |
4271 | (struct pmcraid_instance *)shost->hostdata; |
4272 | u32 adapter_id = (pinstance->pdev->bus->number << 8) | |
4273 | pinstance->pdev->devfn; |
4274 | u32 aen_group = pmcraid_event_family.id; |
4275 | |
4276 | return snprintf(buf, PAGE_SIZE, |
4277 | "adapter id: %d\nminor: %d\naen group: %d\n", |
4278 | adapter_id, MINOR(pinstance->cdev.dev), aen_group); |
4279 | } |
4280 | |
4281 | static struct device_attribute pmcraid_adapter_id_attr = { |
4282 | .attr = { |
4283 | .name = "adapter_id", |
4284 | .mode = S_IRUGO | S_IWUSR, |
4285 | }, |
4286 | .show = pmcraid_show_adapter_id, |
4287 | }; |
4288 | |
4289 | static struct device_attribute *pmcraid_host_attrs[] = { |
4290 | &pmcraid_log_level_attr, |
4291 | &pmcraid_driver_version_attr, |
4292 | &pmcraid_adapter_id_attr, |
4293 | NULL, |
4294 | }; |
4295 | |
4296 | |
4297 | /* host template structure for pmcraid driver */ |
4298 | static struct scsi_host_template pmcraid_host_template = { |
4299 | .module = THIS_MODULE, |
4300 | .name = PMCRAID_DRIVER_NAME, |
4301 | .queuecommand = pmcraid_queuecommand, |
4302 | .eh_abort_handler = pmcraid_eh_abort_handler, |
4303 | .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler, |
4304 | .eh_target_reset_handler = pmcraid_eh_target_reset_handler, |
4305 | .eh_device_reset_handler = pmcraid_eh_device_reset_handler, |
4306 | .eh_host_reset_handler = pmcraid_eh_host_reset_handler, |
4307 | |
4308 | .slave_alloc = pmcraid_slave_alloc, |
4309 | .slave_configure = pmcraid_slave_configure, |
4310 | .slave_destroy = pmcraid_slave_destroy, |
4311 | .change_queue_depth = pmcraid_change_queue_depth, |
4312 | .change_queue_type = pmcraid_change_queue_type, |
4313 | .can_queue = PMCRAID_MAX_IO_CMD, |
4314 | .this_id = -1, |
4315 | .sg_tablesize = PMCRAID_MAX_IOADLS, |
4316 | .max_sectors = PMCRAID_IOA_MAX_SECTORS, |
4317 | .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN, |
4318 | .use_clustering = ENABLE_CLUSTERING, |
4319 | .shost_attrs = pmcraid_host_attrs, |
4320 | .proc_name = PMCRAID_DRIVER_NAME |
4321 | }; |
4322 | |
4323 | /* |
4324 | * pmcraid_isr_msix - implements MSI-X interrupt handling routine |
4325 | * @irq: interrupt vector number |
4326 | * @dev_id: pointer hrrq_vector |
4327 | * |
4328 | * Return Value |
4329 | * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored |
4330 | */ |
4331 | |
4332 | static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id) |
4333 | { |
4334 | struct pmcraid_isr_param *hrrq_vector; |
4335 | struct pmcraid_instance *pinstance; |
4336 | unsigned long lock_flags; |
4337 | u32 intrs_val; |
4338 | int hrrq_id; |
4339 | |
4340 | hrrq_vector = (struct pmcraid_isr_param *)dev_id; |
4341 | hrrq_id = hrrq_vector->hrrq_id; |
4342 | pinstance = hrrq_vector->drv_inst; |
4343 | |
4344 | if (!hrrq_id) { |
4345 | /* Read the interrupt */ |
4346 | intrs_val = pmcraid_read_interrupts(pinstance); |
4347 | if (intrs_val && |
4348 | ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg) |
4349 | & DOORBELL_INTR_MSIX_CLR) == 0)) { |
4350 | /* Any error interrupts including unit_check, |
4351 | * initiate IOA reset.In case of unit check indicate |
4352 | * to reset_sequence that IOA unit checked and prepare |
4353 | * for a dump during reset sequence |
4354 | */ |
4355 | if (intrs_val & PMCRAID_ERROR_INTERRUPTS) { |
4356 | if (intrs_val & INTRS_IOA_UNIT_CHECK) |
4357 | pinstance->ioa_unit_check = 1; |
4358 | |
4359 | pmcraid_err("ISR: error interrupts: %x \ |
4360 | initiating reset\n", intrs_val); |
4361 | spin_lock_irqsave(pinstance->host->host_lock, |
4362 | lock_flags); |
4363 | pmcraid_initiate_reset(pinstance); |
4364 | spin_unlock_irqrestore( |
4365 | pinstance->host->host_lock, |
4366 | lock_flags); |
4367 | } |
4368 | /* If interrupt was as part of the ioa initialization, |
4369 | * clear it. Delete the timer and wakeup the |
4370 | * reset engine to proceed with reset sequence |
4371 | */ |
4372 | if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL) |
4373 | pmcraid_clr_trans_op(pinstance); |
4374 | |
4375 | /* Clear the interrupt register by writing |
4376 | * to host to ioa doorbell. Once done |
4377 | * FW will clear the interrupt. |
4378 | */ |
4379 | iowrite32(DOORBELL_INTR_MSIX_CLR, |
4380 | pinstance->int_regs.host_ioa_interrupt_reg); |
4381 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
4382 | |
4383 | |
4384 | } |
4385 | } |
4386 | |
4387 | tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id])); |
4388 | |
4389 | return IRQ_HANDLED; |
4390 | } |
4391 | |
4392 | /** |
4393 | * pmcraid_isr - implements legacy interrupt handling routine |
4394 | * |
4395 | * @irq: interrupt vector number |
4396 | * @dev_id: pointer hrrq_vector |
4397 | * |
4398 | * Return Value |
4399 | * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored |
4400 | */ |
4401 | static irqreturn_t pmcraid_isr(int irq, void *dev_id) |
4402 | { |
4403 | struct pmcraid_isr_param *hrrq_vector; |
4404 | struct pmcraid_instance *pinstance; |
4405 | u32 intrs; |
4406 | unsigned long lock_flags; |
4407 | int hrrq_id = 0; |
4408 | |
4409 | /* In case of legacy interrupt mode where interrupts are shared across |
4410 | * isrs, it may be possible that the current interrupt is not from IOA |
4411 | */ |
4412 | if (!dev_id) { |
4413 | printk(KERN_INFO "%s(): NULL host pointer\n", __func__); |
4414 | return IRQ_NONE; |
4415 | } |
4416 | hrrq_vector = (struct pmcraid_isr_param *)dev_id; |
4417 | pinstance = hrrq_vector->drv_inst; |
4418 | |
4419 | intrs = pmcraid_read_interrupts(pinstance); |
4420 | |
4421 | if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0)) |
4422 | return IRQ_NONE; |
4423 | |
4424 | /* Any error interrupts including unit_check, initiate IOA reset. |
4425 | * In case of unit check indicate to reset_sequence that IOA unit |
4426 | * checked and prepare for a dump during reset sequence |
4427 | */ |
4428 | if (intrs & PMCRAID_ERROR_INTERRUPTS) { |
4429 | |
4430 | if (intrs & INTRS_IOA_UNIT_CHECK) |
4431 | pinstance->ioa_unit_check = 1; |
4432 | |
4433 | iowrite32(intrs, |
4434 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
4435 | pmcraid_err("ISR: error interrupts: %x initiating reset\n", |
4436 | intrs); |
4437 | intrs = ioread32( |
4438 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
4439 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
4440 | pmcraid_initiate_reset(pinstance); |
4441 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
4442 | } else { |
4443 | /* If interrupt was as part of the ioa initialization, |
4444 | * clear. Delete the timer and wakeup the |
4445 | * reset engine to proceed with reset sequence |
4446 | */ |
4447 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) { |
4448 | pmcraid_clr_trans_op(pinstance); |
4449 | } else { |
4450 | iowrite32(intrs, |
4451 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
4452 | ioread32( |
4453 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
4454 | |
4455 | tasklet_schedule( |
4456 | &(pinstance->isr_tasklet[hrrq_id])); |
4457 | } |
4458 | } |
4459 | |
4460 | return IRQ_HANDLED; |
4461 | } |
4462 | |
4463 | |
4464 | /** |
4465 | * pmcraid_worker_function - worker thread function |
4466 | * |
4467 | * @workp: pointer to struct work queue |
4468 | * |
4469 | * Return Value |
4470 | * None |
4471 | */ |
4472 | |
4473 | static void pmcraid_worker_function(struct work_struct *workp) |
4474 | { |
4475 | struct pmcraid_instance *pinstance; |
4476 | struct pmcraid_resource_entry *res; |
4477 | struct pmcraid_resource_entry *temp; |
4478 | struct scsi_device *sdev; |
4479 | unsigned long lock_flags; |
4480 | unsigned long host_lock_flags; |
4481 | u16 fw_version; |
4482 | u8 bus, target, lun; |
4483 | |
4484 | pinstance = container_of(workp, struct pmcraid_instance, worker_q); |
4485 | /* add resources only after host is added into system */ |
4486 | if (!atomic_read(&pinstance->expose_resources)) |
4487 | return; |
4488 | |
4489 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
4490 | |
4491 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
4492 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) { |
4493 | |
4494 | if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) { |
4495 | sdev = res->scsi_dev; |
4496 | |
4497 | /* host_lock must be held before calling |
4498 | * scsi_device_get |
4499 | */ |
4500 | spin_lock_irqsave(pinstance->host->host_lock, |
4501 | host_lock_flags); |
4502 | if (!scsi_device_get(sdev)) { |
4503 | spin_unlock_irqrestore( |
4504 | pinstance->host->host_lock, |
4505 | host_lock_flags); |
4506 | pmcraid_info("deleting %x from midlayer\n", |
4507 | res->cfg_entry.resource_address); |
4508 | list_move_tail(&res->queue, |
4509 | &pinstance->free_res_q); |
4510 | spin_unlock_irqrestore( |
4511 | &pinstance->resource_lock, |
4512 | lock_flags); |
4513 | scsi_remove_device(sdev); |
4514 | scsi_device_put(sdev); |
4515 | spin_lock_irqsave(&pinstance->resource_lock, |
4516 | lock_flags); |
4517 | res->change_detected = 0; |
4518 | } else { |
4519 | spin_unlock_irqrestore( |
4520 | pinstance->host->host_lock, |
4521 | host_lock_flags); |
4522 | } |
4523 | } |
4524 | } |
4525 | |
4526 | list_for_each_entry(res, &pinstance->used_res_q, queue) { |
4527 | |
4528 | if (res->change_detected == RES_CHANGE_ADD) { |
4529 | |
4530 | if (!pmcraid_expose_resource(fw_version, |
4531 | &res->cfg_entry)) |
4532 | continue; |
4533 | |
4534 | if (RES_IS_VSET(res->cfg_entry)) { |
4535 | bus = PMCRAID_VSET_BUS_ID; |
4536 | if (fw_version <= PMCRAID_FW_VERSION_1) |
4537 | target = res->cfg_entry.unique_flags1; |
4538 | else |
4539 | target = res->cfg_entry.array_id & 0xFF; |
4540 | lun = PMCRAID_VSET_LUN_ID; |
4541 | } else { |
4542 | bus = PMCRAID_PHYS_BUS_ID; |
4543 | target = |
4544 | RES_TARGET( |
4545 | res->cfg_entry.resource_address); |
4546 | lun = RES_LUN(res->cfg_entry.resource_address); |
4547 | } |
4548 | |
4549 | res->change_detected = 0; |
4550 | spin_unlock_irqrestore(&pinstance->resource_lock, |
4551 | lock_flags); |
4552 | scsi_add_device(pinstance->host, bus, target, lun); |
4553 | spin_lock_irqsave(&pinstance->resource_lock, |
4554 | lock_flags); |
4555 | } |
4556 | } |
4557 | |
4558 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
4559 | } |
4560 | |
4561 | /** |
4562 | * pmcraid_tasklet_function - Tasklet function |
4563 | * |
4564 | * @instance: pointer to msix param structure |
4565 | * |
4566 | * Return Value |
4567 | * None |
4568 | */ |
4569 | static void pmcraid_tasklet_function(unsigned long instance) |
4570 | { |
4571 | struct pmcraid_isr_param *hrrq_vector; |
4572 | struct pmcraid_instance *pinstance; |
4573 | unsigned long hrrq_lock_flags; |
4574 | unsigned long pending_lock_flags; |
4575 | unsigned long host_lock_flags; |
4576 | spinlock_t *lockp; /* hrrq buffer lock */ |
4577 | int id; |
4578 | __le32 resp; |
4579 | |
4580 | hrrq_vector = (struct pmcraid_isr_param *)instance; |
4581 | pinstance = hrrq_vector->drv_inst; |
4582 | id = hrrq_vector->hrrq_id; |
4583 | lockp = &(pinstance->hrrq_lock[id]); |
4584 | |
4585 | /* loop through each of the commands responded by IOA. Each HRRQ buf is |
4586 | * protected by its own lock. Traversals must be done within this lock |
4587 | * as there may be multiple tasklets running on multiple CPUs. Note |
4588 | * that the lock is held just for picking up the response handle and |
4589 | * manipulating hrrq_curr/toggle_bit values. |
4590 | */ |
4591 | spin_lock_irqsave(lockp, hrrq_lock_flags); |
4592 | |
4593 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); |
4594 | |
4595 | while ((resp & HRRQ_TOGGLE_BIT) == |
4596 | pinstance->host_toggle_bit[id]) { |
4597 | |
4598 | int cmd_index = resp >> 2; |
4599 | struct pmcraid_cmd *cmd = NULL; |
4600 | |
4601 | if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) { |
4602 | pinstance->hrrq_curr[id]++; |
4603 | } else { |
4604 | pinstance->hrrq_curr[id] = pinstance->hrrq_start[id]; |
4605 | pinstance->host_toggle_bit[id] ^= 1u; |
4606 | } |
4607 | |
4608 | if (cmd_index >= PMCRAID_MAX_CMD) { |
4609 | /* In case of invalid response handle, log message */ |
4610 | pmcraid_err("Invalid response handle %d\n", cmd_index); |
4611 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); |
4612 | continue; |
4613 | } |
4614 | |
4615 | cmd = pinstance->cmd_list[cmd_index]; |
4616 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); |
4617 | |
4618 | spin_lock_irqsave(&pinstance->pending_pool_lock, |
4619 | pending_lock_flags); |
4620 | list_del(&cmd->free_list); |
4621 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
4622 | pending_lock_flags); |
4623 | del_timer(&cmd->timer); |
4624 | atomic_dec(&pinstance->outstanding_cmds); |
4625 | |
4626 | if (cmd->cmd_done == pmcraid_ioa_reset) { |
4627 | spin_lock_irqsave(pinstance->host->host_lock, |
4628 | host_lock_flags); |
4629 | cmd->cmd_done(cmd); |
4630 | spin_unlock_irqrestore(pinstance->host->host_lock, |
4631 | host_lock_flags); |
4632 | } else if (cmd->cmd_done != NULL) { |
4633 | cmd->cmd_done(cmd); |
4634 | } |
4635 | /* loop over until we are done with all responses */ |
4636 | spin_lock_irqsave(lockp, hrrq_lock_flags); |
4637 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); |
4638 | } |
4639 | |
4640 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); |
4641 | } |
4642 | |
4643 | /** |
4644 | * pmcraid_unregister_interrupt_handler - de-register interrupts handlers |
4645 | * @pinstance: pointer to adapter instance structure |
4646 | * |
4647 | * This routine un-registers registered interrupt handler and |
4648 | * also frees irqs/vectors. |
4649 | * |
4650 | * Retun Value |
4651 | * None |
4652 | */ |
4653 | static |
4654 | void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance) |
4655 | { |
4656 | int i; |
4657 | |
4658 | for (i = 0; i < pinstance->num_hrrq; i++) |
4659 | free_irq(pinstance->hrrq_vector[i].vector, |
4660 | &(pinstance->hrrq_vector[i])); |
4661 | |
4662 | if (pinstance->interrupt_mode) { |
4663 | pci_disable_msix(pinstance->pdev); |
4664 | pinstance->interrupt_mode = 0; |
4665 | } |
4666 | } |
4667 | |
4668 | /** |
4669 | * pmcraid_register_interrupt_handler - registers interrupt handler |
4670 | * @pinstance: pointer to per-adapter instance structure |
4671 | * |
4672 | * Return Value |
4673 | * 0 on success, non-zero error code otherwise. |
4674 | */ |
4675 | static int |
4676 | pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance) |
4677 | { |
4678 | int rc; |
4679 | struct pci_dev *pdev = pinstance->pdev; |
4680 | |
4681 | if ((pmcraid_enable_msix) && |
4682 | (pci_find_capability(pdev, PCI_CAP_ID_MSIX))) { |
4683 | int num_hrrq = PMCRAID_NUM_MSIX_VECTORS; |
4684 | struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS]; |
4685 | int i; |
4686 | for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++) |
4687 | entries[i].entry = i; |
4688 | |
4689 | rc = pci_enable_msix(pdev, entries, num_hrrq); |
4690 | if (rc < 0) |
4691 | goto pmcraid_isr_legacy; |
4692 | |
4693 | /* Check how many MSIX vectors are allocated and register |
4694 | * msi-x handlers for each of them giving appropriate buffer |
4695 | */ |
4696 | if (rc > 0) { |
4697 | num_hrrq = rc; |
4698 | if (pci_enable_msix(pdev, entries, num_hrrq)) |
4699 | goto pmcraid_isr_legacy; |
4700 | } |
4701 | |
4702 | for (i = 0; i < num_hrrq; i++) { |
4703 | pinstance->hrrq_vector[i].hrrq_id = i; |
4704 | pinstance->hrrq_vector[i].drv_inst = pinstance; |
4705 | pinstance->hrrq_vector[i].vector = entries[i].vector; |
4706 | rc = request_irq(pinstance->hrrq_vector[i].vector, |
4707 | pmcraid_isr_msix, 0, |
4708 | PMCRAID_DRIVER_NAME, |
4709 | &(pinstance->hrrq_vector[i])); |
4710 | |
4711 | if (rc) { |
4712 | int j; |
4713 | for (j = 0; j < i; j++) |
4714 | free_irq(entries[j].vector, |
4715 | &(pinstance->hrrq_vector[j])); |
4716 | pci_disable_msix(pdev); |
4717 | goto pmcraid_isr_legacy; |
4718 | } |
4719 | } |
4720 | |
4721 | pinstance->num_hrrq = num_hrrq; |
4722 | pinstance->interrupt_mode = 1; |
4723 | iowrite32(DOORBELL_INTR_MODE_MSIX, |
4724 | pinstance->int_regs.host_ioa_interrupt_reg); |
4725 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
4726 | goto pmcraid_isr_out; |
4727 | } |
4728 | |
4729 | pmcraid_isr_legacy: |
4730 | /* If MSI-X registration failed fallback to legacy mode, where |
4731 | * only one hrrq entry will be used |
4732 | */ |
4733 | pinstance->hrrq_vector[0].hrrq_id = 0; |
4734 | pinstance->hrrq_vector[0].drv_inst = pinstance; |
4735 | pinstance->hrrq_vector[0].vector = pdev->irq; |
4736 | pinstance->num_hrrq = 1; |
4737 | rc = 0; |
4738 | |
4739 | rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED, |
4740 | PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]); |
4741 | pmcraid_isr_out: |
4742 | return rc; |
4743 | } |
4744 | |
4745 | /** |
4746 | * pmcraid_release_cmd_blocks - release buufers allocated for command blocks |
4747 | * @pinstance: per adapter instance structure pointer |
4748 | * @max_index: number of buffer blocks to release |
4749 | * |
4750 | * Return Value |
4751 | * None |
4752 | */ |
4753 | static void |
4754 | pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index) |
4755 | { |
4756 | int i; |
4757 | for (i = 0; i < max_index; i++) { |
4758 | kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]); |
4759 | pinstance->cmd_list[i] = NULL; |
4760 | } |
4761 | kmem_cache_destroy(pinstance->cmd_cachep); |
4762 | pinstance->cmd_cachep = NULL; |
4763 | } |
4764 | |
4765 | /** |
4766 | * pmcraid_release_control_blocks - releases buffers alloced for control blocks |
4767 | * @pinstance: pointer to per adapter instance structure |
4768 | * @max_index: number of buffers (from 0 onwards) to release |
4769 | * |
4770 | * This function assumes that the command blocks for which control blocks are |
4771 | * linked are not released. |
4772 | * |
4773 | * Return Value |
4774 | * None |
4775 | */ |
4776 | static void |
4777 | pmcraid_release_control_blocks( |
4778 | struct pmcraid_instance *pinstance, |
4779 | int max_index |
4780 | ) |
4781 | { |
4782 | int i; |
4783 | |
4784 | if (pinstance->control_pool == NULL) |
4785 | return; |
4786 | |
4787 | for (i = 0; i < max_index; i++) { |
4788 | pci_pool_free(pinstance->control_pool, |
4789 | pinstance->cmd_list[i]->ioa_cb, |
4790 | pinstance->cmd_list[i]->ioa_cb_bus_addr); |
4791 | pinstance->cmd_list[i]->ioa_cb = NULL; |
4792 | pinstance->cmd_list[i]->ioa_cb_bus_addr = 0; |
4793 | } |
4794 | pci_pool_destroy(pinstance->control_pool); |
4795 | pinstance->control_pool = NULL; |
4796 | } |
4797 | |
4798 | /** |
4799 | * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures |
4800 | * @pinstance - pointer to per adapter instance structure |
4801 | * |
4802 | * Allocates memory for command blocks using kernel slab allocator. |
4803 | * |
4804 | * Return Value |
4805 | * 0 in case of success; -ENOMEM in case of failure |
4806 | */ |
4807 | static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance) |
4808 | { |
4809 | int i; |
4810 | |
4811 | sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d", |
4812 | pinstance->host->unique_id); |
4813 | |
4814 | |
4815 | pinstance->cmd_cachep = kmem_cache_create( |
4816 | pinstance->cmd_pool_name, |
4817 | sizeof(struct pmcraid_cmd), 0, |
4818 | SLAB_HWCACHE_ALIGN, NULL); |
4819 | if (!pinstance->cmd_cachep) |
4820 | return -ENOMEM; |
4821 | |
4822 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { |
4823 | pinstance->cmd_list[i] = |
4824 | kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL); |
4825 | if (!pinstance->cmd_list[i]) { |
4826 | pmcraid_release_cmd_blocks(pinstance, i); |
4827 | return -ENOMEM; |
4828 | } |
4829 | } |
4830 | return 0; |
4831 | } |
4832 | |
4833 | /** |
4834 | * pmcraid_allocate_control_blocks - allocates memory control blocks |
4835 | * @pinstance : pointer to per adapter instance structure |
4836 | * |
4837 | * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs |
4838 | * and IOASAs. This is called after command blocks are already allocated. |
4839 | * |
4840 | * Return Value |
4841 | * 0 in case it can allocate all control blocks, otherwise -ENOMEM |
4842 | */ |
4843 | static int pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance) |
4844 | { |
4845 | int i; |
4846 | |
4847 | sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d", |
4848 | pinstance->host->unique_id); |
4849 | |
4850 | pinstance->control_pool = |
4851 | pci_pool_create(pinstance->ctl_pool_name, |
4852 | pinstance->pdev, |
4853 | sizeof(struct pmcraid_control_block), |
4854 | PMCRAID_IOARCB_ALIGNMENT, 0); |
4855 | |
4856 | if (!pinstance->control_pool) |
4857 | return -ENOMEM; |
4858 | |
4859 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { |
4860 | pinstance->cmd_list[i]->ioa_cb = |
4861 | pci_pool_alloc( |
4862 | pinstance->control_pool, |
4863 | GFP_KERNEL, |
4864 | &(pinstance->cmd_list[i]->ioa_cb_bus_addr)); |
4865 | |
4866 | if (!pinstance->cmd_list[i]->ioa_cb) { |
4867 | pmcraid_release_control_blocks(pinstance, i); |
4868 | return -ENOMEM; |
4869 | } |
4870 | memset(pinstance->cmd_list[i]->ioa_cb, 0, |
4871 | sizeof(struct pmcraid_control_block)); |
4872 | } |
4873 | return 0; |
4874 | } |
4875 | |
4876 | /** |
4877 | * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s) |
4878 | * @pinstance: pointer to per adapter instance structure |
4879 | * @maxindex: size of hrrq buffer pointer array |
4880 | * |
4881 | * Return Value |
4882 | * None |
4883 | */ |
4884 | static void |
4885 | pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex) |
4886 | { |
4887 | int i; |
4888 | for (i = 0; i < maxindex; i++) { |
4889 | |
4890 | pci_free_consistent(pinstance->pdev, |
4891 | HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD, |
4892 | pinstance->hrrq_start[i], |
4893 | pinstance->hrrq_start_bus_addr[i]); |
4894 | |
4895 | /* reset pointers and toggle bit to zeros */ |
4896 | pinstance->hrrq_start[i] = NULL; |
4897 | pinstance->hrrq_start_bus_addr[i] = 0; |
4898 | pinstance->host_toggle_bit[i] = 0; |
4899 | } |
4900 | } |
4901 | |
4902 | /** |
4903 | * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers |
4904 | * @pinstance: pointer to per adapter instance structure |
4905 | * |
4906 | * Return value |
4907 | * 0 hrrq buffers are allocated, -ENOMEM otherwise. |
4908 | */ |
4909 | static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance) |
4910 | { |
4911 | int i, buffer_size; |
4912 | |
4913 | buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD; |
4914 | |
4915 | for (i = 0; i < pinstance->num_hrrq; i++) { |
4916 | pinstance->hrrq_start[i] = |
4917 | pci_alloc_consistent( |
4918 | pinstance->pdev, |
4919 | buffer_size, |
4920 | &(pinstance->hrrq_start_bus_addr[i])); |
4921 | |
4922 | if (pinstance->hrrq_start[i] == 0) { |
4923 | pmcraid_err("pci_alloc failed for hrrq vector : %d\n", |
4924 | i); |
4925 | pmcraid_release_host_rrqs(pinstance, i); |
4926 | return -ENOMEM; |
4927 | } |
4928 | |
4929 | memset(pinstance->hrrq_start[i], 0, buffer_size); |
4930 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i]; |
4931 | pinstance->hrrq_end[i] = |
4932 | pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1; |
4933 | pinstance->host_toggle_bit[i] = 1; |
4934 | spin_lock_init(&pinstance->hrrq_lock[i]); |
4935 | } |
4936 | return 0; |
4937 | } |
4938 | |
4939 | /** |
4940 | * pmcraid_release_hcams - release HCAM buffers |
4941 | * |
4942 | * @pinstance: pointer to per adapter instance structure |
4943 | * |
4944 | * Return value |
4945 | * none |
4946 | */ |
4947 | static void pmcraid_release_hcams(struct pmcraid_instance *pinstance) |
4948 | { |
4949 | if (pinstance->ccn.msg != NULL) { |
4950 | pci_free_consistent(pinstance->pdev, |
4951 | PMCRAID_AEN_HDR_SIZE + |
4952 | sizeof(struct pmcraid_hcam_ccn_ext), |
4953 | pinstance->ccn.msg, |
4954 | pinstance->ccn.baddr); |
4955 | |
4956 | pinstance->ccn.msg = NULL; |
4957 | pinstance->ccn.hcam = NULL; |
4958 | pinstance->ccn.baddr = 0; |
4959 | } |
4960 | |
4961 | if (pinstance->ldn.msg != NULL) { |
4962 | pci_free_consistent(pinstance->pdev, |
4963 | PMCRAID_AEN_HDR_SIZE + |
4964 | sizeof(struct pmcraid_hcam_ldn), |
4965 | pinstance->ldn.msg, |
4966 | pinstance->ldn.baddr); |
4967 | |
4968 | pinstance->ldn.msg = NULL; |
4969 | pinstance->ldn.hcam = NULL; |
4970 | pinstance->ldn.baddr = 0; |
4971 | } |
4972 | } |
4973 | |
4974 | /** |
4975 | * pmcraid_allocate_hcams - allocates HCAM buffers |
4976 | * @pinstance : pointer to per adapter instance structure |
4977 | * |
4978 | * Return Value: |
4979 | * 0 in case of successful allocation, non-zero otherwise |
4980 | */ |
4981 | static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance) |
4982 | { |
4983 | pinstance->ccn.msg = pci_alloc_consistent( |
4984 | pinstance->pdev, |
4985 | PMCRAID_AEN_HDR_SIZE + |
4986 | sizeof(struct pmcraid_hcam_ccn_ext), |
4987 | &(pinstance->ccn.baddr)); |
4988 | |
4989 | pinstance->ldn.msg = pci_alloc_consistent( |
4990 | pinstance->pdev, |
4991 | PMCRAID_AEN_HDR_SIZE + |
4992 | sizeof(struct pmcraid_hcam_ldn), |
4993 | &(pinstance->ldn.baddr)); |
4994 | |
4995 | if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) { |
4996 | pmcraid_release_hcams(pinstance); |
4997 | } else { |
4998 | pinstance->ccn.hcam = |
4999 | (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE; |
5000 | pinstance->ldn.hcam = |
5001 | (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE; |
5002 | |
5003 | atomic_set(&pinstance->ccn.ignore, 0); |
5004 | atomic_set(&pinstance->ldn.ignore, 0); |
5005 | } |
5006 | |
5007 | return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0; |
5008 | } |
5009 | |
5010 | /** |
5011 | * pmcraid_release_config_buffers - release config.table buffers |
5012 | * @pinstance: pointer to per adapter instance structure |
5013 | * |
5014 | * Return Value |
5015 | * none |
5016 | */ |
5017 | static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance) |
5018 | { |
5019 | if (pinstance->cfg_table != NULL && |
5020 | pinstance->cfg_table_bus_addr != 0) { |
5021 | pci_free_consistent(pinstance->pdev, |
5022 | sizeof(struct pmcraid_config_table), |
5023 | pinstance->cfg_table, |
5024 | pinstance->cfg_table_bus_addr); |
5025 | pinstance->cfg_table = NULL; |
5026 | pinstance->cfg_table_bus_addr = 0; |
5027 | } |
5028 | |
5029 | if (pinstance->res_entries != NULL) { |
5030 | int i; |
5031 | |
5032 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++) |
5033 | list_del(&pinstance->res_entries[i].queue); |
5034 | kfree(pinstance->res_entries); |
5035 | pinstance->res_entries = NULL; |
5036 | } |
5037 | |
5038 | pmcraid_release_hcams(pinstance); |
5039 | } |
5040 | |
5041 | /** |
5042 | * pmcraid_allocate_config_buffers - allocates DMAable memory for config table |
5043 | * @pinstance : pointer to per adapter instance structure |
5044 | * |
5045 | * Return Value |
5046 | * 0 for successful allocation, -ENOMEM for any failure |
5047 | */ |
5048 | static int pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance) |
5049 | { |
5050 | int i; |
5051 | |
5052 | pinstance->res_entries = |
5053 | kzalloc(sizeof(struct pmcraid_resource_entry) * |
5054 | PMCRAID_MAX_RESOURCES, GFP_KERNEL); |
5055 | |
5056 | if (NULL == pinstance->res_entries) { |
5057 | pmcraid_err("failed to allocate memory for resource table\n"); |
5058 | return -ENOMEM; |
5059 | } |
5060 | |
5061 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++) |
5062 | list_add_tail(&pinstance->res_entries[i].queue, |
5063 | &pinstance->free_res_q); |
5064 | |
5065 | pinstance->cfg_table = |
5066 | pci_alloc_consistent(pinstance->pdev, |
5067 | sizeof(struct pmcraid_config_table), |
5068 | &pinstance->cfg_table_bus_addr); |
5069 | |
5070 | if (NULL == pinstance->cfg_table) { |
5071 | pmcraid_err("couldn't alloc DMA memory for config table\n"); |
5072 | pmcraid_release_config_buffers(pinstance); |
5073 | return -ENOMEM; |
5074 | } |
5075 | |
5076 | if (pmcraid_allocate_hcams(pinstance)) { |
5077 | pmcraid_err("could not alloc DMA memory for HCAMS\n"); |
5078 | pmcraid_release_config_buffers(pinstance); |
5079 | return -ENOMEM; |
5080 | } |
5081 | |
5082 | return 0; |
5083 | } |
5084 | |
5085 | /** |
5086 | * pmcraid_init_tasklets - registers tasklets for response handling |
5087 | * |
5088 | * @pinstance: pointer adapter instance structure |
5089 | * |
5090 | * Return value |
5091 | * none |
5092 | */ |
5093 | static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance) |
5094 | { |
5095 | int i; |
5096 | for (i = 0; i < pinstance->num_hrrq; i++) |
5097 | tasklet_init(&pinstance->isr_tasklet[i], |
5098 | pmcraid_tasklet_function, |
5099 | (unsigned long)&pinstance->hrrq_vector[i]); |
5100 | } |
5101 | |
5102 | /** |
5103 | * pmcraid_kill_tasklets - destroys tasklets registered for response handling |
5104 | * |
5105 | * @pinstance: pointer to adapter instance structure |
5106 | * |
5107 | * Return value |
5108 | * none |
5109 | */ |
5110 | static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance) |
5111 | { |
5112 | int i; |
5113 | for (i = 0; i < pinstance->num_hrrq; i++) |
5114 | tasklet_kill(&pinstance->isr_tasklet[i]); |
5115 | } |
5116 | |
5117 | /** |
5118 | * pmcraid_release_buffers - release per-adapter buffers allocated |
5119 | * |
5120 | * @pinstance: pointer to adapter soft state |
5121 | * |
5122 | * Return Value |
5123 | * none |
5124 | */ |
5125 | static void pmcraid_release_buffers(struct pmcraid_instance *pinstance) |
5126 | { |
5127 | pmcraid_release_config_buffers(pinstance); |
5128 | pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD); |
5129 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD); |
5130 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
5131 | |
5132 | if (pinstance->inq_data != NULL) { |
5133 | pci_free_consistent(pinstance->pdev, |
5134 | sizeof(struct pmcraid_inquiry_data), |
5135 | pinstance->inq_data, |
5136 | pinstance->inq_data_baddr); |
5137 | |
5138 | pinstance->inq_data = NULL; |
5139 | pinstance->inq_data_baddr = 0; |
5140 | } |
5141 | |
5142 | if (pinstance->timestamp_data != NULL) { |
5143 | pci_free_consistent(pinstance->pdev, |
5144 | sizeof(struct pmcraid_timestamp_data), |
5145 | pinstance->timestamp_data, |
5146 | pinstance->timestamp_data_baddr); |
5147 | |
5148 | pinstance->timestamp_data = NULL; |
5149 | pinstance->timestamp_data_baddr = 0; |
5150 | } |
5151 | } |
5152 | |
5153 | /** |
5154 | * pmcraid_init_buffers - allocates memory and initializes various structures |
5155 | * @pinstance: pointer to per adapter instance structure |
5156 | * |
5157 | * This routine pre-allocates memory based on the type of block as below: |
5158 | * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator, |
5159 | * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator |
5160 | * config-table entries : DMAable memory using pci_alloc_consistent |
5161 | * HostRRQs : DMAable memory, using pci_alloc_consistent |
5162 | * |
5163 | * Return Value |
5164 | * 0 in case all of the blocks are allocated, -ENOMEM otherwise. |
5165 | */ |
5166 | static int pmcraid_init_buffers(struct pmcraid_instance *pinstance) |
5167 | { |
5168 | int i; |
5169 | |
5170 | if (pmcraid_allocate_host_rrqs(pinstance)) { |
5171 | pmcraid_err("couldn't allocate memory for %d host rrqs\n", |
5172 | pinstance->num_hrrq); |
5173 | return -ENOMEM; |
5174 | } |
5175 | |
5176 | if (pmcraid_allocate_config_buffers(pinstance)) { |
5177 | pmcraid_err("couldn't allocate memory for config buffers\n"); |
5178 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
5179 | return -ENOMEM; |
5180 | } |
5181 | |
5182 | if (pmcraid_allocate_cmd_blocks(pinstance)) { |
5183 | pmcraid_err("couldn't allocate memory for cmd blocks\n"); |
5184 | pmcraid_release_config_buffers(pinstance); |
5185 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
5186 | return -ENOMEM; |
5187 | } |
5188 | |
5189 | if (pmcraid_allocate_control_blocks(pinstance)) { |
5190 | pmcraid_err("couldn't allocate memory control blocks\n"); |
5191 | pmcraid_release_config_buffers(pinstance); |
5192 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD); |
5193 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
5194 | return -ENOMEM; |
5195 | } |
5196 | |
5197 | /* allocate DMAable memory for page D0 INQUIRY buffer */ |
5198 | pinstance->inq_data = pci_alloc_consistent( |
5199 | pinstance->pdev, |
5200 | sizeof(struct pmcraid_inquiry_data), |
5201 | &pinstance->inq_data_baddr); |
5202 | |
5203 | if (pinstance->inq_data == NULL) { |
5204 | pmcraid_err("couldn't allocate DMA memory for INQUIRY\n"); |
5205 | pmcraid_release_buffers(pinstance); |
5206 | return -ENOMEM; |
5207 | } |
5208 | |
5209 | /* allocate DMAable memory for set timestamp data buffer */ |
5210 | pinstance->timestamp_data = pci_alloc_consistent( |
5211 | pinstance->pdev, |
5212 | sizeof(struct pmcraid_timestamp_data), |
5213 | &pinstance->timestamp_data_baddr); |
5214 | |
5215 | if (pinstance->timestamp_data == NULL) { |
5216 | pmcraid_err("couldn't allocate DMA memory for \ |
5217 | set time_stamp \n"); |
5218 | pmcraid_release_buffers(pinstance); |
5219 | return -ENOMEM; |
5220 | } |
5221 | |
5222 | |
5223 | /* Initialize all the command blocks and add them to free pool. No |
5224 | * need to lock (free_pool_lock) as this is done in initialization |
5225 | * itself |
5226 | */ |
5227 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { |
5228 | struct pmcraid_cmd *cmdp = pinstance->cmd_list[i]; |
5229 | pmcraid_init_cmdblk(cmdp, i); |
5230 | cmdp->drv_inst = pinstance; |
5231 | list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool); |
5232 | } |
5233 | |
5234 | return 0; |
5235 | } |
5236 | |
5237 | /** |
5238 | * pmcraid_reinit_buffers - resets various buffer pointers |
5239 | * @pinstance: pointer to adapter instance |
5240 | * Return value |
5241 | * none |
5242 | */ |
5243 | static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance) |
5244 | { |
5245 | int i; |
5246 | int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD; |
5247 | |
5248 | for (i = 0; i < pinstance->num_hrrq; i++) { |
5249 | memset(pinstance->hrrq_start[i], 0, buffer_size); |
5250 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i]; |
5251 | pinstance->hrrq_end[i] = |
5252 | pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1; |
5253 | pinstance->host_toggle_bit[i] = 1; |
5254 | } |
5255 | } |
5256 | |
5257 | /** |
5258 | * pmcraid_init_instance - initialize per instance data structure |
5259 | * @pdev: pointer to pci device structure |
5260 | * @host: pointer to Scsi_Host structure |
5261 | * @mapped_pci_addr: memory mapped IOA configuration registers |
5262 | * |
5263 | * Return Value |
5264 | * 0 on success, non-zero in case of any failure |
5265 | */ |
5266 | static int pmcraid_init_instance(struct pci_dev *pdev, struct Scsi_Host *host, |
5267 | void __iomem *mapped_pci_addr) |
5268 | { |
5269 | struct pmcraid_instance *pinstance = |
5270 | (struct pmcraid_instance *)host->hostdata; |
5271 | |
5272 | pinstance->host = host; |
5273 | pinstance->pdev = pdev; |
5274 | |
5275 | /* Initialize register addresses */ |
5276 | pinstance->mapped_dma_addr = mapped_pci_addr; |
5277 | |
5278 | /* Initialize chip-specific details */ |
5279 | { |
5280 | struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg; |
5281 | struct pmcraid_interrupts *pint_regs = &pinstance->int_regs; |
5282 | |
5283 | pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin; |
5284 | |
5285 | pint_regs->ioa_host_interrupt_reg = |
5286 | mapped_pci_addr + chip_cfg->ioa_host_intr; |
5287 | pint_regs->ioa_host_interrupt_clr_reg = |
5288 | mapped_pci_addr + chip_cfg->ioa_host_intr_clr; |
5289 | pint_regs->ioa_host_msix_interrupt_reg = |
5290 | mapped_pci_addr + chip_cfg->ioa_host_msix_intr; |
5291 | pint_regs->host_ioa_interrupt_reg = |
5292 | mapped_pci_addr + chip_cfg->host_ioa_intr; |
5293 | pint_regs->host_ioa_interrupt_clr_reg = |
5294 | mapped_pci_addr + chip_cfg->host_ioa_intr_clr; |
5295 | |
5296 | /* Current version of firmware exposes interrupt mask set |
5297 | * and mask clr registers through memory mapped bar0. |
5298 | */ |
5299 | pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox; |
5300 | pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus; |
5301 | pint_regs->ioa_host_interrupt_mask_reg = |
5302 | mapped_pci_addr + chip_cfg->ioa_host_mask; |
5303 | pint_regs->ioa_host_interrupt_mask_clr_reg = |
5304 | mapped_pci_addr + chip_cfg->ioa_host_mask_clr; |
5305 | pint_regs->global_interrupt_mask_reg = |
5306 | mapped_pci_addr + chip_cfg->global_intr_mask; |
5307 | }; |
5308 | |
5309 | pinstance->ioa_reset_attempts = 0; |
5310 | init_waitqueue_head(&pinstance->reset_wait_q); |
5311 | |
5312 | atomic_set(&pinstance->outstanding_cmds, 0); |
5313 | atomic_set(&pinstance->last_message_id, 0); |
5314 | atomic_set(&pinstance->expose_resources, 0); |
5315 | |
5316 | INIT_LIST_HEAD(&pinstance->free_res_q); |
5317 | INIT_LIST_HEAD(&pinstance->used_res_q); |
5318 | INIT_LIST_HEAD(&pinstance->free_cmd_pool); |
5319 | INIT_LIST_HEAD(&pinstance->pending_cmd_pool); |
5320 | |
5321 | spin_lock_init(&pinstance->free_pool_lock); |
5322 | spin_lock_init(&pinstance->pending_pool_lock); |
5323 | spin_lock_init(&pinstance->resource_lock); |
5324 | mutex_init(&pinstance->aen_queue_lock); |
5325 | |
5326 | /* Work-queue (Shared) for deferred processing error handling */ |
5327 | INIT_WORK(&pinstance->worker_q, pmcraid_worker_function); |
5328 | |
5329 | /* Initialize the default log_level */ |
5330 | pinstance->current_log_level = pmcraid_log_level; |
5331 | |
5332 | /* Setup variables required for reset engine */ |
5333 | pinstance->ioa_state = IOA_STATE_UNKNOWN; |
5334 | pinstance->reset_cmd = NULL; |
5335 | return 0; |
5336 | } |
5337 | |
5338 | /** |
5339 | * pmcraid_shutdown - shutdown adapter controller. |
5340 | * @pdev: pci device struct |
5341 | * |
5342 | * Issues an adapter shutdown to the card waits for its completion |
5343 | * |
5344 | * Return value |
5345 | * none |
5346 | */ |
5347 | static void pmcraid_shutdown(struct pci_dev *pdev) |
5348 | { |
5349 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
5350 | pmcraid_reset_bringdown(pinstance); |
5351 | } |
5352 | |
5353 | |
5354 | /** |
5355 | * pmcraid_get_minor - returns unused minor number from minor number bitmap |
5356 | */ |
5357 | static unsigned short pmcraid_get_minor(void) |
5358 | { |
5359 | int minor; |
5360 | |
5361 | minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor)); |
5362 | __set_bit(minor, pmcraid_minor); |
5363 | return minor; |
5364 | } |
5365 | |
5366 | /** |
5367 | * pmcraid_release_minor - releases given minor back to minor number bitmap |
5368 | */ |
5369 | static void pmcraid_release_minor(unsigned short minor) |
5370 | { |
5371 | __clear_bit(minor, pmcraid_minor); |
5372 | } |
5373 | |
5374 | /** |
5375 | * pmcraid_setup_chrdev - allocates a minor number and registers a char device |
5376 | * |
5377 | * @pinstance: pointer to adapter instance for which to register device |
5378 | * |
5379 | * Return value |
5380 | * 0 in case of success, otherwise non-zero |
5381 | */ |
5382 | static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance) |
5383 | { |
5384 | int minor; |
5385 | int error; |
5386 | |
5387 | minor = pmcraid_get_minor(); |
5388 | cdev_init(&pinstance->cdev, &pmcraid_fops); |
5389 | pinstance->cdev.owner = THIS_MODULE; |
5390 | |
5391 | error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1); |
5392 | |
5393 | if (error) |
5394 | pmcraid_release_minor(minor); |
5395 | else |
5396 | device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor), |
5397 | NULL, "%s%u", PMCRAID_DEVFILE, minor); |
5398 | return error; |
5399 | } |
5400 | |
5401 | /** |
5402 | * pmcraid_release_chrdev - unregisters per-adapter management interface |
5403 | * |
5404 | * @pinstance: pointer to adapter instance structure |
5405 | * |
5406 | * Return value |
5407 | * none |
5408 | */ |
5409 | static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance) |
5410 | { |
5411 | pmcraid_release_minor(MINOR(pinstance->cdev.dev)); |
5412 | device_destroy(pmcraid_class, |
5413 | MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev))); |
5414 | cdev_del(&pinstance->cdev); |
5415 | } |
5416 | |
5417 | /** |
5418 | * pmcraid_remove - IOA hot plug remove entry point |
5419 | * @pdev: pci device struct |
5420 | * |
5421 | * Return value |
5422 | * none |
5423 | */ |
5424 | static void pmcraid_remove(struct pci_dev *pdev) |
5425 | { |
5426 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
5427 | |
5428 | /* remove the management interface (/dev file) for this device */ |
5429 | pmcraid_release_chrdev(pinstance); |
5430 | |
5431 | /* remove host template from scsi midlayer */ |
5432 | scsi_remove_host(pinstance->host); |
5433 | |
5434 | /* block requests from mid-layer */ |
5435 | scsi_block_requests(pinstance->host); |
5436 | |
5437 | /* initiate shutdown adapter */ |
5438 | pmcraid_shutdown(pdev); |
5439 | |
5440 | pmcraid_disable_interrupts(pinstance, ~0); |
5441 | flush_work(&pinstance->worker_q); |
5442 | |
5443 | pmcraid_kill_tasklets(pinstance); |
5444 | pmcraid_unregister_interrupt_handler(pinstance); |
5445 | pmcraid_release_buffers(pinstance); |
5446 | iounmap(pinstance->mapped_dma_addr); |
5447 | pci_release_regions(pdev); |
5448 | scsi_host_put(pinstance->host); |
5449 | pci_disable_device(pdev); |
5450 | |
5451 | return; |
5452 | } |
5453 | |
5454 | #ifdef CONFIG_PM |
5455 | /** |
5456 | * pmcraid_suspend - driver suspend entry point for power management |
5457 | * @pdev: PCI device structure |
5458 | * @state: PCI power state to suspend routine |
5459 | * |
5460 | * Return Value - 0 always |
5461 | */ |
5462 | static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state) |
5463 | { |
5464 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
5465 | |
5466 | pmcraid_shutdown(pdev); |
5467 | pmcraid_disable_interrupts(pinstance, ~0); |
5468 | pmcraid_kill_tasklets(pinstance); |
5469 | pci_set_drvdata(pinstance->pdev, pinstance); |
5470 | pmcraid_unregister_interrupt_handler(pinstance); |
5471 | pci_save_state(pdev); |
5472 | pci_disable_device(pdev); |
5473 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
5474 | |
5475 | return 0; |
5476 | } |
5477 | |
5478 | /** |
5479 | * pmcraid_resume - driver resume entry point PCI power management |
5480 | * @pdev: PCI device structure |
5481 | * |
5482 | * Return Value - 0 in case of success. Error code in case of any failure |
5483 | */ |
5484 | static int pmcraid_resume(struct pci_dev *pdev) |
5485 | { |
5486 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
5487 | struct Scsi_Host *host = pinstance->host; |
5488 | int rc; |
5489 | |
5490 | pci_set_power_state(pdev, PCI_D0); |
5491 | pci_enable_wake(pdev, PCI_D0, 0); |
5492 | pci_restore_state(pdev); |
5493 | |
5494 | rc = pci_enable_device(pdev); |
5495 | |
5496 | if (rc) { |
5497 | dev_err(&pdev->dev, "resume: Enable device failed\n"); |
5498 | return rc; |
5499 | } |
5500 | |
5501 | pci_set_master(pdev); |
5502 | |
5503 | if ((sizeof(dma_addr_t) == 4) || |
5504 | pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) |
5505 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
5506 | |
5507 | if (rc == 0) |
5508 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
5509 | |
5510 | if (rc != 0) { |
5511 | dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n"); |
5512 | goto disable_device; |
5513 | } |
5514 | |
5515 | pmcraid_disable_interrupts(pinstance, ~0); |
5516 | atomic_set(&pinstance->outstanding_cmds, 0); |
5517 | rc = pmcraid_register_interrupt_handler(pinstance); |
5518 | |
5519 | if (rc) { |
5520 | dev_err(&pdev->dev, |
5521 | "resume: couldn't register interrupt handlers\n"); |
5522 | rc = -ENODEV; |
5523 | goto release_host; |
5524 | } |
5525 | |
5526 | pmcraid_init_tasklets(pinstance); |
5527 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
5528 | |
5529 | /* Start with hard reset sequence which brings up IOA to operational |
5530 | * state as well as completes the reset sequence. |
5531 | */ |
5532 | pinstance->ioa_hard_reset = 1; |
5533 | |
5534 | /* Start IOA firmware initialization and bring card to Operational |
5535 | * state. |
5536 | */ |
5537 | if (pmcraid_reset_bringup(pinstance)) { |
5538 | dev_err(&pdev->dev, "couldn't initialize IOA\n"); |
5539 | rc = -ENODEV; |
5540 | goto release_tasklets; |
5541 | } |
5542 | |
5543 | return 0; |
5544 | |
5545 | release_tasklets: |
5546 | pmcraid_disable_interrupts(pinstance, ~0); |
5547 | pmcraid_kill_tasklets(pinstance); |
5548 | pmcraid_unregister_interrupt_handler(pinstance); |
5549 | |
5550 | release_host: |
5551 | scsi_host_put(host); |
5552 | |
5553 | disable_device: |
5554 | pci_disable_device(pdev); |
5555 | |
5556 | return rc; |
5557 | } |
5558 | |
5559 | #else |
5560 | |
5561 | #define pmcraid_suspend NULL |
5562 | #define pmcraid_resume NULL |
5563 | |
5564 | #endif /* CONFIG_PM */ |
5565 | |
5566 | /** |
5567 | * pmcraid_complete_ioa_reset - Called by either timer or tasklet during |
5568 | * completion of the ioa reset |
5569 | * @cmd: pointer to reset command block |
5570 | */ |
5571 | static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd) |
5572 | { |
5573 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
5574 | unsigned long flags; |
5575 | |
5576 | spin_lock_irqsave(pinstance->host->host_lock, flags); |
5577 | pmcraid_ioa_reset(cmd); |
5578 | spin_unlock_irqrestore(pinstance->host->host_lock, flags); |
5579 | scsi_unblock_requests(pinstance->host); |
5580 | schedule_work(&pinstance->worker_q); |
5581 | } |
5582 | |
5583 | /** |
5584 | * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP |
5585 | * |
5586 | * @cmd: pointer to pmcraid_cmd structure |
5587 | * |
5588 | * Return Value |
5589 | * 0 for success or non-zero for failure cases |
5590 | */ |
5591 | static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd) |
5592 | { |
5593 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
5594 | void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset; |
5595 | |
5596 | pmcraid_reinit_cmdblk(cmd); |
5597 | |
5598 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
5599 | ioarcb->request_type = REQ_TYPE_IOACMD; |
5600 | ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES; |
5601 | ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED; |
5602 | |
5603 | /* If this was called as part of resource table reinitialization due to |
5604 | * lost CCN, it is enough to return the command block back to free pool |
5605 | * as part of set_supported_devs completion function. |
5606 | */ |
5607 | if (cmd->drv_inst->reinit_cfg_table) { |
5608 | cmd->drv_inst->reinit_cfg_table = 0; |
5609 | cmd->release = 1; |
5610 | cmd_done = pmcraid_reinit_cfgtable_done; |
5611 | } |
5612 | |
5613 | /* we will be done with the reset sequence after set supported devices, |
5614 | * setup the done function to return the command block back to free |
5615 | * pool |
5616 | */ |
5617 | pmcraid_send_cmd(cmd, |
5618 | cmd_done, |
5619 | PMCRAID_SET_SUP_DEV_TIMEOUT, |
5620 | pmcraid_timeout_handler); |
5621 | return; |
5622 | } |
5623 | |
5624 | /** |
5625 | * pmcraid_set_timestamp - set the timestamp to IOAFP |
5626 | * |
5627 | * @cmd: pointer to pmcraid_cmd structure |
5628 | * |
5629 | * Return Value |
5630 | * 0 for success or non-zero for failure cases |
5631 | */ |
5632 | static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd) |
5633 | { |
5634 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
5635 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
5636 | __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN); |
5637 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
5638 | |
5639 | struct timeval tv; |
5640 | __le64 timestamp; |
5641 | |
5642 | do_gettimeofday(&tv); |
5643 | timestamp = tv.tv_sec * 1000; |
5644 | |
5645 | pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp); |
5646 | pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8); |
5647 | pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16); |
5648 | pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24); |
5649 | pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32); |
5650 | pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40); |
5651 | |
5652 | pmcraid_reinit_cmdblk(cmd); |
5653 | ioarcb->request_type = REQ_TYPE_SCSI; |
5654 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
5655 | ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP; |
5656 | ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION; |
5657 | memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len)); |
5658 | |
5659 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
5660 | offsetof(struct pmcraid_ioarcb, |
5661 | add_data.u.ioadl[0])); |
5662 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
5663 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
5664 | |
5665 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
5666 | ioarcb->request_flags0 |= TRANSFER_DIR_WRITE; |
5667 | ioarcb->data_transfer_length = |
5668 | cpu_to_le32(sizeof(struct pmcraid_timestamp_data)); |
5669 | ioadl = &(ioarcb->add_data.u.ioadl[0]); |
5670 | ioadl->flags = IOADL_FLAGS_LAST_DESC; |
5671 | ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr); |
5672 | ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data)); |
5673 | |
5674 | if (!pinstance->timestamp_error) { |
5675 | pinstance->timestamp_error = 0; |
5676 | pmcraid_send_cmd(cmd, pmcraid_set_supported_devs, |
5677 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler); |
5678 | } else { |
5679 | pmcraid_send_cmd(cmd, pmcraid_return_cmd, |
5680 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler); |
5681 | return; |
5682 | } |
5683 | } |
5684 | |
5685 | |
5686 | /** |
5687 | * pmcraid_init_res_table - Initialize the resource table |
5688 | * @cmd: pointer to pmcraid command struct |
5689 | * |
5690 | * This function looks through the existing resource table, comparing |
5691 | * it with the config table. This function will take care of old/new |
5692 | * devices and schedule adding/removing them from the mid-layer |
5693 | * as appropriate. |
5694 | * |
5695 | * Return value |
5696 | * None |
5697 | */ |
5698 | static void pmcraid_init_res_table(struct pmcraid_cmd *cmd) |
5699 | { |
5700 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
5701 | struct pmcraid_resource_entry *res, *temp; |
5702 | struct pmcraid_config_table_entry *cfgte; |
5703 | unsigned long lock_flags; |
5704 | int found, rc, i; |
5705 | u16 fw_version; |
5706 | LIST_HEAD(old_res); |
5707 | |
5708 | if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED) |
5709 | pmcraid_err("IOA requires microcode download\n"); |
5710 | |
5711 | fw_version = be16_to_cpu(pinstance->inq_data->fw_version); |
5712 | |
5713 | /* resource list is protected by pinstance->resource_lock. |
5714 | * init_res_table can be called from probe (user-thread) or runtime |
5715 | * reset (timer/tasklet) |
5716 | */ |
5717 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
5718 | |
5719 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) |
5720 | list_move_tail(&res->queue, &old_res); |
5721 | |
5722 | for (i = 0; i < pinstance->cfg_table->num_entries; i++) { |
5723 | if (be16_to_cpu(pinstance->inq_data->fw_version) <= |
5724 | PMCRAID_FW_VERSION_1) |
5725 | cfgte = &pinstance->cfg_table->entries[i]; |
5726 | else |
5727 | cfgte = (struct pmcraid_config_table_entry *) |
5728 | &pinstance->cfg_table->entries_ext[i]; |
5729 | |
5730 | if (!pmcraid_expose_resource(fw_version, cfgte)) |
5731 | continue; |
5732 | |
5733 | found = 0; |
5734 | |
5735 | /* If this entry was already detected and initialized */ |
5736 | list_for_each_entry_safe(res, temp, &old_res, queue) { |
5737 | |
5738 | rc = memcmp(&res->cfg_entry.resource_address, |
5739 | &cfgte->resource_address, |
5740 | sizeof(cfgte->resource_address)); |
5741 | if (!rc) { |
5742 | list_move_tail(&res->queue, |
5743 | &pinstance->used_res_q); |
5744 | found = 1; |
5745 | break; |
5746 | } |
5747 | } |
5748 | |
5749 | /* If this is new entry, initialize it and add it the queue */ |
5750 | if (!found) { |
5751 | |
5752 | if (list_empty(&pinstance->free_res_q)) { |
5753 | pmcraid_err("Too many devices attached\n"); |
5754 | break; |
5755 | } |
5756 | |
5757 | found = 1; |
5758 | res = list_entry(pinstance->free_res_q.next, |
5759 | struct pmcraid_resource_entry, queue); |
5760 | |
5761 | res->scsi_dev = NULL; |
5762 | res->change_detected = RES_CHANGE_ADD; |
5763 | res->reset_progress = 0; |
5764 | list_move_tail(&res->queue, &pinstance->used_res_q); |
5765 | } |
5766 | |
5767 | /* copy new configuration table entry details into driver |
5768 | * maintained resource entry |
5769 | */ |
5770 | if (found) { |
5771 | memcpy(&res->cfg_entry, cfgte, |
5772 | pinstance->config_table_entry_size); |
5773 | pmcraid_info("New res type:%x, vset:%x, addr:%x:\n", |
5774 | res->cfg_entry.resource_type, |
5775 | (fw_version <= PMCRAID_FW_VERSION_1 ? |
5776 | res->cfg_entry.unique_flags1 : |
5777 | res->cfg_entry.array_id & 0xFF), |
5778 | le32_to_cpu(res->cfg_entry.resource_address)); |
5779 | } |
5780 | } |
5781 | |
5782 | /* Detect any deleted entries, mark them for deletion from mid-layer */ |
5783 | list_for_each_entry_safe(res, temp, &old_res, queue) { |
5784 | |
5785 | if (res->scsi_dev) { |
5786 | res->change_detected = RES_CHANGE_DEL; |
5787 | res->cfg_entry.resource_handle = |
5788 | PMCRAID_INVALID_RES_HANDLE; |
5789 | list_move_tail(&res->queue, &pinstance->used_res_q); |
5790 | } else { |
5791 | list_move_tail(&res->queue, &pinstance->free_res_q); |
5792 | } |
5793 | } |
5794 | |
5795 | /* release the resource list lock */ |
5796 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
5797 | pmcraid_set_timestamp(cmd); |
5798 | } |
5799 | |
5800 | /** |
5801 | * pmcraid_querycfg - Send a Query IOA Config to the adapter. |
5802 | * @cmd: pointer pmcraid_cmd struct |
5803 | * |
5804 | * This function sends a Query IOA Configuration command to the adapter to |
5805 | * retrieve the IOA configuration table. |
5806 | * |
5807 | * Return value: |
5808 | * none |
5809 | */ |
5810 | static void pmcraid_querycfg(struct pmcraid_cmd *cmd) |
5811 | { |
5812 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
5813 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
5814 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
5815 | int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table)); |
5816 | |
5817 | if (be16_to_cpu(pinstance->inq_data->fw_version) <= |
5818 | PMCRAID_FW_VERSION_1) |
5819 | pinstance->config_table_entry_size = |
5820 | sizeof(struct pmcraid_config_table_entry); |
5821 | else |
5822 | pinstance->config_table_entry_size = |
5823 | sizeof(struct pmcraid_config_table_entry_ext); |
5824 | |
5825 | ioarcb->request_type = REQ_TYPE_IOACMD; |
5826 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
5827 | |
5828 | ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG; |
5829 | |
5830 | /* firmware requires 4-byte length field, specified in B.E format */ |
5831 | memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size)); |
5832 | |
5833 | /* Since entire config table can be described by single IOADL, it can |
5834 | * be part of IOARCB itself |
5835 | */ |
5836 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
5837 | offsetof(struct pmcraid_ioarcb, |
5838 | add_data.u.ioadl[0])); |
5839 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
5840 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
5841 | |
5842 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
5843 | ioarcb->data_transfer_length = |
5844 | cpu_to_le32(sizeof(struct pmcraid_config_table)); |
5845 | |
5846 | ioadl = &(ioarcb->add_data.u.ioadl[0]); |
5847 | ioadl->flags = IOADL_FLAGS_LAST_DESC; |
5848 | ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr); |
5849 | ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table)); |
5850 | |
5851 | pmcraid_send_cmd(cmd, pmcraid_init_res_table, |
5852 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler); |
5853 | } |
5854 | |
5855 | |
5856 | /** |
5857 | * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver |
5858 | * @pdev: pointer to pci device structure |
5859 | * @dev_id: pointer to device ids structure |
5860 | * |
5861 | * Return Value |
5862 | * returns 0 if the device is claimed and successfully configured. |
5863 | * returns non-zero error code in case of any failure |
5864 | */ |
5865 | static int pmcraid_probe(struct pci_dev *pdev, |
5866 | const struct pci_device_id *dev_id) |
5867 | { |
5868 | struct pmcraid_instance *pinstance; |
5869 | struct Scsi_Host *host; |
5870 | void __iomem *mapped_pci_addr; |
5871 | int rc = PCIBIOS_SUCCESSFUL; |
5872 | |
5873 | if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) { |
5874 | pmcraid_err |
5875 | ("maximum number(%d) of supported adapters reached\n", |
5876 | atomic_read(&pmcraid_adapter_count)); |
5877 | return -ENOMEM; |
5878 | } |
5879 | |
5880 | atomic_inc(&pmcraid_adapter_count); |
5881 | rc = pci_enable_device(pdev); |
5882 | |
5883 | if (rc) { |
5884 | dev_err(&pdev->dev, "Cannot enable adapter\n"); |
5885 | atomic_dec(&pmcraid_adapter_count); |
5886 | return rc; |
5887 | } |
5888 | |
5889 | dev_info(&pdev->dev, |
5890 | "Found new IOA(%x:%x), Total IOA count: %d\n", |
5891 | pdev->vendor, pdev->device, |
5892 | atomic_read(&pmcraid_adapter_count)); |
5893 | |
5894 | rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME); |
5895 | |
5896 | if (rc < 0) { |
5897 | dev_err(&pdev->dev, |
5898 | "Couldn't register memory range of registers\n"); |
5899 | goto out_disable_device; |
5900 | } |
5901 | |
5902 | mapped_pci_addr = pci_iomap(pdev, 0, 0); |
5903 | |
5904 | if (!mapped_pci_addr) { |
5905 | dev_err(&pdev->dev, "Couldn't map PCI registers memory\n"); |
5906 | rc = -ENOMEM; |
5907 | goto out_release_regions; |
5908 | } |
5909 | |
5910 | pci_set_master(pdev); |
5911 | |
5912 | /* Firmware requires the system bus address of IOARCB to be within |
5913 | * 32-bit addressable range though it has 64-bit IOARRIN register. |
5914 | * However, firmware supports 64-bit streaming DMA buffers, whereas |
5915 | * coherent buffers are to be 32-bit. Since pci_alloc_consistent always |
5916 | * returns memory within 4GB (if not, change this logic), coherent |
5917 | * buffers are within firmware acceptable address ranges. |
5918 | */ |
5919 | if ((sizeof(dma_addr_t) == 4) || |
5920 | pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) |
5921 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
5922 | |
5923 | /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32 |
5924 | * bit mask for pci_alloc_consistent to return addresses within 4GB |
5925 | */ |
5926 | if (rc == 0) |
5927 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
5928 | |
5929 | if (rc != 0) { |
5930 | dev_err(&pdev->dev, "Failed to set PCI DMA mask\n"); |
5931 | goto cleanup_nomem; |
5932 | } |
5933 | |
5934 | host = scsi_host_alloc(&pmcraid_host_template, |
5935 | sizeof(struct pmcraid_instance)); |
5936 | |
5937 | if (!host) { |
5938 | dev_err(&pdev->dev, "scsi_host_alloc failed!\n"); |
5939 | rc = -ENOMEM; |
5940 | goto cleanup_nomem; |
5941 | } |
5942 | |
5943 | host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS; |
5944 | host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET; |
5945 | host->unique_id = host->host_no; |
5946 | host->max_channel = PMCRAID_MAX_BUS_TO_SCAN; |
5947 | host->max_cmd_len = PMCRAID_MAX_CDB_LEN; |
5948 | |
5949 | /* zero out entire instance structure */ |
5950 | pinstance = (struct pmcraid_instance *)host->hostdata; |
5951 | memset(pinstance, 0, sizeof(*pinstance)); |
5952 | |
5953 | pinstance->chip_cfg = |
5954 | (struct pmcraid_chip_details *)(dev_id->driver_data); |
5955 | |
5956 | rc = pmcraid_init_instance(pdev, host, mapped_pci_addr); |
5957 | |
5958 | if (rc < 0) { |
5959 | dev_err(&pdev->dev, "failed to initialize adapter instance\n"); |
5960 | goto out_scsi_host_put; |
5961 | } |
5962 | |
5963 | pci_set_drvdata(pdev, pinstance); |
5964 | |
5965 | /* Save PCI config-space for use following the reset */ |
5966 | rc = pci_save_state(pinstance->pdev); |
5967 | |
5968 | if (rc != 0) { |
5969 | dev_err(&pdev->dev, "Failed to save PCI config space\n"); |
5970 | goto out_scsi_host_put; |
5971 | } |
5972 | |
5973 | pmcraid_disable_interrupts(pinstance, ~0); |
5974 | |
5975 | rc = pmcraid_register_interrupt_handler(pinstance); |
5976 | |
5977 | if (rc) { |
5978 | dev_err(&pdev->dev, "couldn't register interrupt handler\n"); |
5979 | goto out_scsi_host_put; |
5980 | } |
5981 | |
5982 | pmcraid_init_tasklets(pinstance); |
5983 | |
5984 | /* allocate verious buffers used by LLD.*/ |
5985 | rc = pmcraid_init_buffers(pinstance); |
5986 | |
5987 | if (rc) { |
5988 | pmcraid_err("couldn't allocate memory blocks\n"); |
5989 | goto out_unregister_isr; |
5990 | } |
5991 | |
5992 | /* check the reset type required */ |
5993 | pmcraid_reset_type(pinstance); |
5994 | |
5995 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
5996 | |
5997 | /* Start IOA firmware initialization and bring card to Operational |
5998 | * state. |
5999 | */ |
6000 | pmcraid_info("starting IOA initialization sequence\n"); |
6001 | if (pmcraid_reset_bringup(pinstance)) { |
6002 | dev_err(&pdev->dev, "couldn't initialize IOA\n"); |
6003 | rc = 1; |
6004 | goto out_release_bufs; |
6005 | } |
6006 | |
6007 | /* Add adapter instance into mid-layer list */ |
6008 | rc = scsi_add_host(pinstance->host, &pdev->dev); |
6009 | if (rc != 0) { |
6010 | pmcraid_err("couldn't add host into mid-layer: %d\n", rc); |
6011 | goto out_release_bufs; |
6012 | } |
6013 | |
6014 | scsi_scan_host(pinstance->host); |
6015 | |
6016 | rc = pmcraid_setup_chrdev(pinstance); |
6017 | |
6018 | if (rc != 0) { |
6019 | pmcraid_err("couldn't create mgmt interface, error: %x\n", |
6020 | rc); |
6021 | goto out_remove_host; |
6022 | } |
6023 | |
6024 | /* Schedule worker thread to handle CCN and take care of adding and |
6025 | * removing devices to OS |
6026 | */ |
6027 | atomic_set(&pinstance->expose_resources, 1); |
6028 | schedule_work(&pinstance->worker_q); |
6029 | return rc; |
6030 | |
6031 | out_remove_host: |
6032 | scsi_remove_host(host); |
6033 | |
6034 | out_release_bufs: |
6035 | pmcraid_release_buffers(pinstance); |
6036 | |
6037 | out_unregister_isr: |
6038 | pmcraid_kill_tasklets(pinstance); |
6039 | pmcraid_unregister_interrupt_handler(pinstance); |
6040 | |
6041 | out_scsi_host_put: |
6042 | scsi_host_put(host); |
6043 | |
6044 | cleanup_nomem: |
6045 | iounmap(mapped_pci_addr); |
6046 | |
6047 | out_release_regions: |
6048 | pci_release_regions(pdev); |
6049 | |
6050 | out_disable_device: |
6051 | atomic_dec(&pmcraid_adapter_count); |
6052 | pci_set_drvdata(pdev, NULL); |
6053 | pci_disable_device(pdev); |
6054 | return -ENODEV; |
6055 | } |
6056 | |
6057 | /* |
6058 | * PCI driver structure of pcmraid driver |
6059 | */ |
6060 | static struct pci_driver pmcraid_driver = { |
6061 | .name = PMCRAID_DRIVER_NAME, |
6062 | .id_table = pmcraid_pci_table, |
6063 | .probe = pmcraid_probe, |
6064 | .remove = pmcraid_remove, |
6065 | .suspend = pmcraid_suspend, |
6066 | .resume = pmcraid_resume, |
6067 | .shutdown = pmcraid_shutdown |
6068 | }; |
6069 | |
6070 | /** |
6071 | * pmcraid_init - module load entry point |
6072 | */ |
6073 | static int __init pmcraid_init(void) |
6074 | { |
6075 | dev_t dev; |
6076 | int error; |
6077 | |
6078 | pmcraid_info("%s Device Driver version: %s\n", |
6079 | PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION); |
6080 | |
6081 | error = alloc_chrdev_region(&dev, 0, |
6082 | PMCRAID_MAX_ADAPTERS, |
6083 | PMCRAID_DEVFILE); |
6084 | |
6085 | if (error) { |
6086 | pmcraid_err("failed to get a major number for adapters\n"); |
6087 | goto out_init; |
6088 | } |
6089 | |
6090 | pmcraid_major = MAJOR(dev); |
6091 | pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE); |
6092 | |
6093 | if (IS_ERR(pmcraid_class)) { |
6094 | error = PTR_ERR(pmcraid_class); |
6095 | pmcraid_err("failed to register with sysfs, error = %x\n", |
6096 | error); |
6097 | goto out_unreg_chrdev; |
6098 | } |
6099 | |
6100 | error = pmcraid_netlink_init(); |
6101 | |
6102 | if (error) |
6103 | goto out_unreg_chrdev; |
6104 | |
6105 | error = pci_register_driver(&pmcraid_driver); |
6106 | |
6107 | if (error == 0) |
6108 | goto out_init; |
6109 | |
6110 | pmcraid_err("failed to register pmcraid driver, error = %x\n", |
6111 | error); |
6112 | class_destroy(pmcraid_class); |
6113 | pmcraid_netlink_release(); |
6114 | |
6115 | out_unreg_chrdev: |
6116 | unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS); |
6117 | |
6118 | out_init: |
6119 | return error; |
6120 | } |
6121 | |
6122 | /** |
6123 | * pmcraid_exit - module unload entry point |
6124 | */ |
6125 | static void __exit pmcraid_exit(void) |
6126 | { |
6127 | pmcraid_netlink_release(); |
6128 | unregister_chrdev_region(MKDEV(pmcraid_major, 0), |
6129 | PMCRAID_MAX_ADAPTERS); |
6130 | pci_unregister_driver(&pmcraid_driver); |
6131 | class_destroy(pmcraid_class); |
6132 | } |
6133 | |
6134 | module_init(pmcraid_init); |
6135 | module_exit(pmcraid_exit); |
6136 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
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jz-3.6-rc2-pwm
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jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9