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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/version.h> |
43 | #include <linux/io.h> |
44 | #include <linux/slab.h> |
45 | #include <asm/irq.h> |
46 | #include <asm/processor.h> |
47 | #include <linux/libata.h> |
48 | #include <linux/mutex.h> |
49 | #include <scsi/scsi.h> |
50 | #include <scsi/scsi_host.h> |
51 | #include <scsi/scsi_device.h> |
52 | #include <scsi/scsi_tcq.h> |
53 | #include <scsi/scsi_eh.h> |
54 | #include <scsi/scsi_cmnd.h> |
55 | #include <scsi/scsicam.h> |
56 | |
57 | #include "pmcraid.h" |
58 | |
59 | /* |
60 | * Module configuration parameters |
61 | */ |
62 | static unsigned int pmcraid_debug_log; |
63 | static unsigned int pmcraid_disable_aen; |
64 | static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST; |
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_mask = 0x7FC28, |
117 | .ioa_host_mask_clr = 0x7FC28, |
118 | .host_ioa_intr = 0x00020, |
119 | .host_ioa_intr_clr = 0x00020, |
120 | .transop_timeout = 300 |
121 | } |
122 | }; |
123 | |
124 | /* |
125 | * PCI device ids supported by pmcraid driver |
126 | */ |
127 | static struct pci_device_id pmcraid_pci_table[] __devinitdata = { |
128 | { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID), |
129 | 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0] |
130 | }, |
131 | {} |
132 | }; |
133 | |
134 | MODULE_DEVICE_TABLE(pci, pmcraid_pci_table); |
135 | |
136 | |
137 | |
138 | /** |
139 | * pmcraid_slave_alloc - Prepare for commands to a device |
140 | * @scsi_dev: scsi device struct |
141 | * |
142 | * This function is called by mid-layer prior to sending any command to the new |
143 | * device. Stores resource entry details of the device in scsi_device struct. |
144 | * Queuecommand uses the resource handle and other details to fill up IOARCB |
145 | * while sending commands to the device. |
146 | * |
147 | * Return value: |
148 | * 0 on success / -ENXIO if device does not exist |
149 | */ |
150 | static int pmcraid_slave_alloc(struct scsi_device *scsi_dev) |
151 | { |
152 | struct pmcraid_resource_entry *temp, *res = NULL; |
153 | struct pmcraid_instance *pinstance; |
154 | u8 target, bus, lun; |
155 | unsigned long lock_flags; |
156 | int rc = -ENXIO; |
157 | pinstance = shost_priv(scsi_dev->host); |
158 | |
159 | /* Driver exposes VSET and GSCSI resources only; all other device types |
160 | * are not exposed. Resource list is synchronized using resource lock |
161 | * so any traversal or modifications to the list should be done inside |
162 | * this lock |
163 | */ |
164 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
165 | list_for_each_entry(temp, &pinstance->used_res_q, queue) { |
166 | |
167 | /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */ |
168 | if (RES_IS_VSET(temp->cfg_entry)) { |
169 | target = temp->cfg_entry.unique_flags1; |
170 | if (target > PMCRAID_MAX_VSET_TARGETS) |
171 | continue; |
172 | bus = PMCRAID_VSET_BUS_ID; |
173 | lun = 0; |
174 | } else if (RES_IS_GSCSI(temp->cfg_entry)) { |
175 | target = RES_TARGET(temp->cfg_entry.resource_address); |
176 | bus = PMCRAID_PHYS_BUS_ID; |
177 | lun = RES_LUN(temp->cfg_entry.resource_address); |
178 | } else { |
179 | continue; |
180 | } |
181 | |
182 | if (bus == scsi_dev->channel && |
183 | target == scsi_dev->id && |
184 | lun == scsi_dev->lun) { |
185 | res = temp; |
186 | break; |
187 | } |
188 | } |
189 | |
190 | if (res) { |
191 | res->scsi_dev = scsi_dev; |
192 | scsi_dev->hostdata = res; |
193 | res->change_detected = 0; |
194 | atomic_set(&res->read_failures, 0); |
195 | atomic_set(&res->write_failures, 0); |
196 | rc = 0; |
197 | } |
198 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
199 | return rc; |
200 | } |
201 | |
202 | /** |
203 | * pmcraid_slave_configure - Configures a SCSI device |
204 | * @scsi_dev: scsi device struct |
205 | * |
206 | * This fucntion is executed by SCSI mid layer just after a device is first |
207 | * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the |
208 | * timeout value (default 30s) will be over-written to a higher value (60s) |
209 | * and max_sectors value will be over-written to 512. It also sets queue depth |
210 | * to host->cmd_per_lun value |
211 | * |
212 | * Return value: |
213 | * 0 on success |
214 | */ |
215 | static int pmcraid_slave_configure(struct scsi_device *scsi_dev) |
216 | { |
217 | struct pmcraid_resource_entry *res = scsi_dev->hostdata; |
218 | |
219 | if (!res) |
220 | return 0; |
221 | |
222 | /* LLD exposes VSETs and Enclosure devices only */ |
223 | if (RES_IS_GSCSI(res->cfg_entry) && |
224 | scsi_dev->type != TYPE_ENCLOSURE) |
225 | return -ENXIO; |
226 | |
227 | pmcraid_info("configuring %x:%x:%x:%x\n", |
228 | scsi_dev->host->unique_id, |
229 | scsi_dev->channel, |
230 | scsi_dev->id, |
231 | scsi_dev->lun); |
232 | |
233 | if (RES_IS_GSCSI(res->cfg_entry)) { |
234 | scsi_dev->allow_restart = 1; |
235 | } else if (RES_IS_VSET(res->cfg_entry)) { |
236 | scsi_dev->allow_restart = 1; |
237 | blk_queue_rq_timeout(scsi_dev->request_queue, |
238 | PMCRAID_VSET_IO_TIMEOUT); |
239 | blk_queue_max_hw_sectors(scsi_dev->request_queue, |
240 | PMCRAID_VSET_MAX_SECTORS); |
241 | } |
242 | |
243 | if (scsi_dev->tagged_supported && |
244 | (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { |
245 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); |
246 | scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG, |
247 | scsi_dev->host->cmd_per_lun); |
248 | } else { |
249 | scsi_adjust_queue_depth(scsi_dev, 0, |
250 | scsi_dev->host->cmd_per_lun); |
251 | } |
252 | |
253 | return 0; |
254 | } |
255 | |
256 | /** |
257 | * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it |
258 | * |
259 | * @scsi_dev: scsi device struct |
260 | * |
261 | * This is called by mid-layer before removing a device. Pointer assignments |
262 | * done in pmcraid_slave_alloc will be reset to NULL here. |
263 | * |
264 | * Return value |
265 | * none |
266 | */ |
267 | static void pmcraid_slave_destroy(struct scsi_device *scsi_dev) |
268 | { |
269 | struct pmcraid_resource_entry *res; |
270 | |
271 | res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; |
272 | |
273 | if (res) |
274 | res->scsi_dev = NULL; |
275 | |
276 | scsi_dev->hostdata = NULL; |
277 | } |
278 | |
279 | /** |
280 | * pmcraid_change_queue_depth - Change the device's queue depth |
281 | * @scsi_dev: scsi device struct |
282 | * @depth: depth to set |
283 | * @reason: calling context |
284 | * |
285 | * Return value |
286 | * actual depth set |
287 | */ |
288 | static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth, |
289 | int reason) |
290 | { |
291 | if (reason != SCSI_QDEPTH_DEFAULT) |
292 | return -EOPNOTSUPP; |
293 | |
294 | if (depth > PMCRAID_MAX_CMD_PER_LUN) |
295 | depth = PMCRAID_MAX_CMD_PER_LUN; |
296 | |
297 | scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth); |
298 | |
299 | return scsi_dev->queue_depth; |
300 | } |
301 | |
302 | /** |
303 | * pmcraid_change_queue_type - Change the device's queue type |
304 | * @scsi_dev: scsi device struct |
305 | * @tag: type of tags to use |
306 | * |
307 | * Return value: |
308 | * actual queue type set |
309 | */ |
310 | static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag) |
311 | { |
312 | struct pmcraid_resource_entry *res; |
313 | |
314 | res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; |
315 | |
316 | if ((res) && scsi_dev->tagged_supported && |
317 | (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { |
318 | scsi_set_tag_type(scsi_dev, tag); |
319 | |
320 | if (tag) |
321 | scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); |
322 | else |
323 | scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth); |
324 | } else |
325 | tag = 0; |
326 | |
327 | return tag; |
328 | } |
329 | |
330 | |
331 | /** |
332 | * pmcraid_init_cmdblk - initializes a command block |
333 | * |
334 | * @cmd: pointer to struct pmcraid_cmd to be initialized |
335 | * @index: if >=0 first time initialization; otherwise reinitialization |
336 | * |
337 | * Return Value |
338 | * None |
339 | */ |
340 | void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index) |
341 | { |
342 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); |
343 | dma_addr_t dma_addr = cmd->ioa_cb_bus_addr; |
344 | |
345 | if (index >= 0) { |
346 | /* first time initialization (called from probe) */ |
347 | u32 ioasa_offset = |
348 | offsetof(struct pmcraid_control_block, ioasa); |
349 | |
350 | cmd->index = index; |
351 | ioarcb->response_handle = cpu_to_le32(index << 2); |
352 | ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr); |
353 | ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset); |
354 | ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa)); |
355 | } else { |
356 | /* re-initialization of various lengths, called once command is |
357 | * processed by IOA |
358 | */ |
359 | memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN); |
360 | ioarcb->request_flags0 = 0; |
361 | ioarcb->request_flags1 = 0; |
362 | ioarcb->cmd_timeout = 0; |
363 | ioarcb->ioarcb_bus_addr &= (~0x1FULL); |
364 | ioarcb->ioadl_bus_addr = 0; |
365 | ioarcb->ioadl_length = 0; |
366 | ioarcb->data_transfer_length = 0; |
367 | ioarcb->add_cmd_param_length = 0; |
368 | ioarcb->add_cmd_param_offset = 0; |
369 | cmd->ioa_cb->ioasa.ioasc = 0; |
370 | cmd->ioa_cb->ioasa.residual_data_length = 0; |
371 | cmd->u.time_left = 0; |
372 | } |
373 | |
374 | cmd->cmd_done = NULL; |
375 | cmd->scsi_cmd = NULL; |
376 | cmd->release = 0; |
377 | cmd->completion_req = 0; |
378 | cmd->dma_handle = 0; |
379 | init_timer(&cmd->timer); |
380 | } |
381 | |
382 | /** |
383 | * pmcraid_reinit_cmdblk - reinitialize a command block |
384 | * |
385 | * @cmd: pointer to struct pmcraid_cmd to be reinitialized |
386 | * |
387 | * Return Value |
388 | * None |
389 | */ |
390 | static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd) |
391 | { |
392 | pmcraid_init_cmdblk(cmd, -1); |
393 | } |
394 | |
395 | /** |
396 | * pmcraid_get_free_cmd - get a free cmd block from command block pool |
397 | * @pinstance: adapter instance structure |
398 | * |
399 | * Return Value: |
400 | * returns pointer to cmd block or NULL if no blocks are available |
401 | */ |
402 | static struct pmcraid_cmd *pmcraid_get_free_cmd( |
403 | struct pmcraid_instance *pinstance |
404 | ) |
405 | { |
406 | struct pmcraid_cmd *cmd = NULL; |
407 | unsigned long lock_flags; |
408 | |
409 | /* free cmd block list is protected by free_pool_lock */ |
410 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); |
411 | |
412 | if (!list_empty(&pinstance->free_cmd_pool)) { |
413 | cmd = list_entry(pinstance->free_cmd_pool.next, |
414 | struct pmcraid_cmd, free_list); |
415 | list_del(&cmd->free_list); |
416 | } |
417 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); |
418 | |
419 | /* Initialize the command block before giving it the caller */ |
420 | if (cmd != NULL) |
421 | pmcraid_reinit_cmdblk(cmd); |
422 | return cmd; |
423 | } |
424 | |
425 | /** |
426 | * pmcraid_return_cmd - return a completed command block back into free pool |
427 | * @cmd: pointer to the command block |
428 | * |
429 | * Return Value: |
430 | * nothing |
431 | */ |
432 | void pmcraid_return_cmd(struct pmcraid_cmd *cmd) |
433 | { |
434 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
435 | unsigned long lock_flags; |
436 | |
437 | spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); |
438 | list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool); |
439 | spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); |
440 | } |
441 | |
442 | /** |
443 | * pmcraid_read_interrupts - reads IOA interrupts |
444 | * |
445 | * @pinstance: pointer to adapter instance structure |
446 | * |
447 | * Return value |
448 | * interrupts read from IOA |
449 | */ |
450 | static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance) |
451 | { |
452 | return ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
453 | } |
454 | |
455 | /** |
456 | * pmcraid_disable_interrupts - Masks and clears all specified interrupts |
457 | * |
458 | * @pinstance: pointer to per adapter instance structure |
459 | * @intrs: interrupts to disable |
460 | * |
461 | * Return Value |
462 | * None |
463 | */ |
464 | static void pmcraid_disable_interrupts( |
465 | struct pmcraid_instance *pinstance, |
466 | u32 intrs |
467 | ) |
468 | { |
469 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
470 | u32 nmask = gmask | GLOBAL_INTERRUPT_MASK; |
471 | |
472 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); |
473 | iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg); |
474 | iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg); |
475 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
476 | } |
477 | |
478 | /** |
479 | * pmcraid_enable_interrupts - Enables specified interrupts |
480 | * |
481 | * @pinstance: pointer to per adapter instance structure |
482 | * @intr: interrupts to enable |
483 | * |
484 | * Return Value |
485 | * None |
486 | */ |
487 | static void pmcraid_enable_interrupts( |
488 | struct pmcraid_instance *pinstance, |
489 | u32 intrs |
490 | ) |
491 | { |
492 | u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
493 | u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK); |
494 | |
495 | iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); |
496 | iowrite32(~intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg); |
497 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
498 | |
499 | pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n", |
500 | ioread32(pinstance->int_regs.global_interrupt_mask_reg), |
501 | ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg)); |
502 | } |
503 | |
504 | /** |
505 | * pmcraid_reset_type - Determine the required reset type |
506 | * @pinstance: pointer to adapter instance structure |
507 | * |
508 | * IOA requires hard reset if any of the following conditions is true. |
509 | * 1. If HRRQ valid interrupt is not masked |
510 | * 2. IOA reset alert doorbell is set |
511 | * 3. If there are any error interrupts |
512 | */ |
513 | static void pmcraid_reset_type(struct pmcraid_instance *pinstance) |
514 | { |
515 | u32 mask; |
516 | u32 intrs; |
517 | u32 alerts; |
518 | |
519 | mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
520 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
521 | alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
522 | |
523 | if ((mask & INTRS_HRRQ_VALID) == 0 || |
524 | (alerts & DOORBELL_IOA_RESET_ALERT) || |
525 | (intrs & PMCRAID_ERROR_INTERRUPTS)) { |
526 | pmcraid_info("IOA requires hard reset\n"); |
527 | pinstance->ioa_hard_reset = 1; |
528 | } |
529 | |
530 | /* If unit check is active, trigger the dump */ |
531 | if (intrs & INTRS_IOA_UNIT_CHECK) |
532 | pinstance->ioa_unit_check = 1; |
533 | } |
534 | |
535 | /** |
536 | * pmcraid_bist_done - completion function for PCI BIST |
537 | * @cmd: pointer to reset command |
538 | * Return Value |
539 | * none |
540 | */ |
541 | |
542 | static void pmcraid_ioa_reset(struct pmcraid_cmd *); |
543 | |
544 | static void pmcraid_bist_done(struct pmcraid_cmd *cmd) |
545 | { |
546 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
547 | unsigned long lock_flags; |
548 | int rc; |
549 | u16 pci_reg; |
550 | |
551 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); |
552 | |
553 | /* If PCI config space can't be accessed wait for another two secs */ |
554 | if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) && |
555 | cmd->u.time_left > 0) { |
556 | pmcraid_info("BIST not complete, waiting another 2 secs\n"); |
557 | cmd->timer.expires = jiffies + cmd->u.time_left; |
558 | cmd->u.time_left = 0; |
559 | cmd->timer.data = (unsigned long)cmd; |
560 | cmd->timer.function = |
561 | (void (*)(unsigned long))pmcraid_bist_done; |
562 | add_timer(&cmd->timer); |
563 | } else { |
564 | cmd->u.time_left = 0; |
565 | pmcraid_info("BIST is complete, proceeding with reset\n"); |
566 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
567 | pmcraid_ioa_reset(cmd); |
568 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
569 | } |
570 | } |
571 | |
572 | /** |
573 | * pmcraid_start_bist - starts BIST |
574 | * @cmd: pointer to reset cmd |
575 | * Return Value |
576 | * none |
577 | */ |
578 | static void pmcraid_start_bist(struct pmcraid_cmd *cmd) |
579 | { |
580 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
581 | u32 doorbells, intrs; |
582 | |
583 | /* proceed with bist and wait for 2 seconds */ |
584 | iowrite32(DOORBELL_IOA_START_BIST, |
585 | pinstance->int_regs.host_ioa_interrupt_reg); |
586 | doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
587 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
588 | pmcraid_info("doorbells after start bist: %x intrs: %x \n", |
589 | doorbells, intrs); |
590 | |
591 | cmd->u.time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); |
592 | cmd->timer.data = (unsigned long)cmd; |
593 | cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); |
594 | cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done; |
595 | add_timer(&cmd->timer); |
596 | } |
597 | |
598 | /** |
599 | * pmcraid_reset_alert_done - completion routine for reset_alert |
600 | * @cmd: pointer to command block used in reset sequence |
601 | * Return value |
602 | * None |
603 | */ |
604 | static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd) |
605 | { |
606 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
607 | u32 status = ioread32(pinstance->ioa_status); |
608 | unsigned long lock_flags; |
609 | |
610 | /* if the critical operation in progress bit is set or the wait times |
611 | * out, invoke reset engine to proceed with hard reset. If there is |
612 | * some more time to wait, restart the timer |
613 | */ |
614 | if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) || |
615 | cmd->u.time_left <= 0) { |
616 | pmcraid_info("critical op is reset proceeding with reset\n"); |
617 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
618 | pmcraid_ioa_reset(cmd); |
619 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
620 | } else { |
621 | pmcraid_info("critical op is not yet reset waiting again\n"); |
622 | /* restart timer if some more time is available to wait */ |
623 | cmd->u.time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
624 | cmd->timer.data = (unsigned long)cmd; |
625 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
626 | cmd->timer.function = |
627 | (void (*)(unsigned long))pmcraid_reset_alert_done; |
628 | add_timer(&cmd->timer); |
629 | } |
630 | } |
631 | |
632 | /** |
633 | * pmcraid_reset_alert - alerts IOA for a possible reset |
634 | * @cmd : command block to be used for reset sequence. |
635 | * |
636 | * Return Value |
637 | * returns 0 if pci config-space is accessible and RESET_DOORBELL is |
638 | * successfully written to IOA. Returns non-zero in case pci_config_space |
639 | * is not accessible |
640 | */ |
641 | static void pmcraid_reset_alert(struct pmcraid_cmd *cmd) |
642 | { |
643 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
644 | u32 doorbells; |
645 | int rc; |
646 | u16 pci_reg; |
647 | |
648 | /* If we are able to access IOA PCI config space, alert IOA that we are |
649 | * going to reset it soon. This enables IOA to preserv persistent error |
650 | * data if any. In case memory space is not accessible, proceed with |
651 | * BIST or slot_reset |
652 | */ |
653 | rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); |
654 | if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) { |
655 | |
656 | /* wait for IOA permission i.e until CRITICAL_OPERATION bit is |
657 | * reset IOA doesn't generate any interrupts when CRITICAL |
658 | * OPERATION bit is reset. A timer is started to wait for this |
659 | * bit to be reset. |
660 | */ |
661 | cmd->u.time_left = PMCRAID_RESET_TIMEOUT; |
662 | cmd->timer.data = (unsigned long)cmd; |
663 | cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
664 | cmd->timer.function = |
665 | (void (*)(unsigned long))pmcraid_reset_alert_done; |
666 | add_timer(&cmd->timer); |
667 | |
668 | iowrite32(DOORBELL_IOA_RESET_ALERT, |
669 | pinstance->int_regs.host_ioa_interrupt_reg); |
670 | doorbells = |
671 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
672 | pmcraid_info("doorbells after reset alert: %x\n", doorbells); |
673 | } else { |
674 | pmcraid_info("PCI config is not accessible starting BIST\n"); |
675 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; |
676 | pmcraid_start_bist(cmd); |
677 | } |
678 | } |
679 | |
680 | /** |
681 | * pmcraid_timeout_handler - Timeout handler for internally generated ops |
682 | * |
683 | * @cmd : pointer to command structure, that got timedout |
684 | * |
685 | * This function blocks host requests and initiates an adapter reset. |
686 | * |
687 | * Return value: |
688 | * None |
689 | */ |
690 | static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd) |
691 | { |
692 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
693 | unsigned long lock_flags; |
694 | |
695 | dev_info(&pinstance->pdev->dev, |
696 | "Adapter being reset due to command timeout.\n"); |
697 | |
698 | /* Command timeouts result in hard reset sequence. The command that got |
699 | * timed out may be the one used as part of reset sequence. In this |
700 | * case restart reset sequence using the same command block even if |
701 | * reset is in progress. Otherwise fail this command and get a free |
702 | * command block to restart the reset sequence. |
703 | */ |
704 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
705 | if (!pinstance->ioa_reset_in_progress) { |
706 | pinstance->ioa_reset_attempts = 0; |
707 | cmd = pmcraid_get_free_cmd(pinstance); |
708 | |
709 | /* If we are out of command blocks, just return here itself. |
710 | * Some other command's timeout handler can do the reset job |
711 | */ |
712 | if (cmd == NULL) { |
713 | spin_unlock_irqrestore(pinstance->host->host_lock, |
714 | lock_flags); |
715 | pmcraid_err("no free cmnd block for timeout handler\n"); |
716 | return; |
717 | } |
718 | |
719 | pinstance->reset_cmd = cmd; |
720 | pinstance->ioa_reset_in_progress = 1; |
721 | } else { |
722 | pmcraid_info("reset is already in progress\n"); |
723 | |
724 | if (pinstance->reset_cmd != cmd) { |
725 | /* This command should have been given to IOA, this |
726 | * command will be completed by fail_outstanding_cmds |
727 | * anyway |
728 | */ |
729 | pmcraid_err("cmd is pending but reset in progress\n"); |
730 | } |
731 | |
732 | /* If this command was being used as part of the reset |
733 | * sequence, set cmd_done pointer to pmcraid_ioa_reset. This |
734 | * causes fail_outstanding_commands not to return the command |
735 | * block back to free pool |
736 | */ |
737 | if (cmd == pinstance->reset_cmd) |
738 | cmd->cmd_done = pmcraid_ioa_reset; |
739 | |
740 | } |
741 | |
742 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
743 | scsi_block_requests(pinstance->host); |
744 | pmcraid_reset_alert(cmd); |
745 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
746 | } |
747 | |
748 | /** |
749 | * pmcraid_internal_done - completion routine for internally generated cmds |
750 | * |
751 | * @cmd: command that got response from IOA |
752 | * |
753 | * Return Value: |
754 | * none |
755 | */ |
756 | static void pmcraid_internal_done(struct pmcraid_cmd *cmd) |
757 | { |
758 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", |
759 | cmd->ioa_cb->ioarcb.cdb[0], |
760 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
761 | |
762 | /* Some of the internal commands are sent with callers blocking for the |
763 | * response. Same will be indicated as part of cmd->completion_req |
764 | * field. Response path needs to wake up any waiters waiting for cmd |
765 | * completion if this flag is set. |
766 | */ |
767 | if (cmd->completion_req) { |
768 | cmd->completion_req = 0; |
769 | complete(&cmd->wait_for_completion); |
770 | } |
771 | |
772 | /* most of the internal commands are completed by caller itself, so |
773 | * no need to return the command block back to free pool until we are |
774 | * required to do so (e.g once done with initialization). |
775 | */ |
776 | if (cmd->release) { |
777 | cmd->release = 0; |
778 | pmcraid_return_cmd(cmd); |
779 | } |
780 | } |
781 | |
782 | /** |
783 | * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization |
784 | * |
785 | * @cmd: command that got response from IOA |
786 | * |
787 | * This routine is called after driver re-reads configuration table due to a |
788 | * lost CCN. It returns the command block back to free pool and schedules |
789 | * worker thread to add/delete devices into the system. |
790 | * |
791 | * Return Value: |
792 | * none |
793 | */ |
794 | static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd) |
795 | { |
796 | pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", |
797 | cmd->ioa_cb->ioarcb.cdb[0], |
798 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
799 | |
800 | if (cmd->release) { |
801 | cmd->release = 0; |
802 | pmcraid_return_cmd(cmd); |
803 | } |
804 | pmcraid_info("scheduling worker for config table reinitialization\n"); |
805 | schedule_work(&cmd->drv_inst->worker_q); |
806 | } |
807 | |
808 | /** |
809 | * pmcraid_erp_done - Process completion of SCSI error response from device |
810 | * @cmd: pmcraid_command |
811 | * |
812 | * This function copies the sense buffer into the scsi_cmd struct and completes |
813 | * scsi_cmd by calling scsi_done function. |
814 | * |
815 | * Return value: |
816 | * none |
817 | */ |
818 | static void pmcraid_erp_done(struct pmcraid_cmd *cmd) |
819 | { |
820 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
821 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
822 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
823 | |
824 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) { |
825 | scsi_cmd->result |= (DID_ERROR << 16); |
826 | scmd_printk(KERN_INFO, scsi_cmd, |
827 | "command CDB[0] = %x failed with IOASC: 0x%08X\n", |
828 | cmd->ioa_cb->ioarcb.cdb[0], ioasc); |
829 | } |
830 | |
831 | /* if we had allocated sense buffers for request sense, copy the sense |
832 | * release the buffers |
833 | */ |
834 | if (cmd->sense_buffer != NULL) { |
835 | memcpy(scsi_cmd->sense_buffer, |
836 | cmd->sense_buffer, |
837 | SCSI_SENSE_BUFFERSIZE); |
838 | pci_free_consistent(pinstance->pdev, |
839 | SCSI_SENSE_BUFFERSIZE, |
840 | cmd->sense_buffer, cmd->sense_buffer_dma); |
841 | cmd->sense_buffer = NULL; |
842 | cmd->sense_buffer_dma = 0; |
843 | } |
844 | |
845 | scsi_dma_unmap(scsi_cmd); |
846 | pmcraid_return_cmd(cmd); |
847 | scsi_cmd->scsi_done(scsi_cmd); |
848 | } |
849 | |
850 | /** |
851 | * pmcraid_fire_command - sends an IOA command to adapter |
852 | * |
853 | * This function adds the given block into pending command list |
854 | * and returns without waiting |
855 | * |
856 | * @cmd : command to be sent to the device |
857 | * |
858 | * Return Value |
859 | * None |
860 | */ |
861 | static void _pmcraid_fire_command(struct pmcraid_cmd *cmd) |
862 | { |
863 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
864 | unsigned long lock_flags; |
865 | |
866 | /* Add this command block to pending cmd pool. We do this prior to |
867 | * writting IOARCB to ioarrin because IOA might complete the command |
868 | * by the time we are about to add it to the list. Response handler |
869 | * (isr/tasklet) looks for cmb block in the pending pending list. |
870 | */ |
871 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
872 | list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool); |
873 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); |
874 | atomic_inc(&pinstance->outstanding_cmds); |
875 | |
876 | /* driver writes lower 32-bit value of IOARCB address only */ |
877 | mb(); |
878 | iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr), |
879 | pinstance->ioarrin); |
880 | } |
881 | |
882 | /** |
883 | * pmcraid_send_cmd - fires a command to IOA |
884 | * |
885 | * This function also sets up timeout function, and command completion |
886 | * function |
887 | * |
888 | * @cmd: pointer to the command block to be fired to IOA |
889 | * @cmd_done: command completion function, called once IOA responds |
890 | * @timeout: timeout to wait for this command completion |
891 | * @timeout_func: timeout handler |
892 | * |
893 | * Return value |
894 | * none |
895 | */ |
896 | static void pmcraid_send_cmd( |
897 | struct pmcraid_cmd *cmd, |
898 | void (*cmd_done) (struct pmcraid_cmd *), |
899 | unsigned long timeout, |
900 | void (*timeout_func) (struct pmcraid_cmd *) |
901 | ) |
902 | { |
903 | /* initialize done function */ |
904 | cmd->cmd_done = cmd_done; |
905 | |
906 | if (timeout_func) { |
907 | /* setup timeout handler */ |
908 | cmd->timer.data = (unsigned long)cmd; |
909 | cmd->timer.expires = jiffies + timeout; |
910 | cmd->timer.function = (void (*)(unsigned long))timeout_func; |
911 | add_timer(&cmd->timer); |
912 | } |
913 | |
914 | /* fire the command to IOA */ |
915 | _pmcraid_fire_command(cmd); |
916 | } |
917 | |
918 | /** |
919 | * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa |
920 | * |
921 | * @cmd: pointer to the command block used as part of reset sequence |
922 | * |
923 | * Return Value |
924 | * None |
925 | */ |
926 | static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd) |
927 | { |
928 | pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n", |
929 | cmd->ioa_cb->ioarcb.cdb[0], |
930 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
931 | |
932 | /* Note that commands sent during reset require next command to be sent |
933 | * to IOA. Hence reinit the done function as well as timeout function |
934 | */ |
935 | pmcraid_reinit_cmdblk(cmd); |
936 | cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD; |
937 | cmd->ioa_cb->ioarcb.resource_handle = |
938 | cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
939 | cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN; |
940 | cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL; |
941 | |
942 | /* fire shutdown command to hardware. */ |
943 | pmcraid_info("firing normal shutdown command (%d) to IOA\n", |
944 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle)); |
945 | |
946 | pmcraid_send_cmd(cmd, pmcraid_ioa_reset, |
947 | PMCRAID_SHUTDOWN_TIMEOUT, |
948 | pmcraid_timeout_handler); |
949 | } |
950 | |
951 | /** |
952 | * pmcraid_identify_hrrq - registers host rrq buffers with IOA |
953 | * @cmd: pointer to command block to be used for identify hrrq |
954 | * |
955 | * Return Value |
956 | * 0 in case of success, otherwise non-zero failure code |
957 | */ |
958 | |
959 | static void pmcraid_querycfg(struct pmcraid_cmd *); |
960 | |
961 | static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd) |
962 | { |
963 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
964 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
965 | int index = 0; |
966 | __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]); |
967 | u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD); |
968 | |
969 | pmcraid_reinit_cmdblk(cmd); |
970 | |
971 | /* Initialize ioarcb */ |
972 | ioarcb->request_type = REQ_TYPE_IOACMD; |
973 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
974 | |
975 | /* initialize the hrrq number where IOA will respond to this command */ |
976 | ioarcb->hrrq_id = index; |
977 | ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ; |
978 | ioarcb->cdb[1] = index; |
979 | |
980 | /* IOA expects 64-bit pci address to be written in B.E format |
981 | * (i.e cdb[2]=MSByte..cdb[9]=LSB. |
982 | */ |
983 | pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb => %llx:%llx\n", |
984 | hrrq_addr, ioarcb->ioarcb_bus_addr); |
985 | |
986 | memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr)); |
987 | memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size)); |
988 | |
989 | /* Subsequent commands require HRRQ identification to be successful. |
990 | * Note that this gets called even during reset from SCSI mid-layer |
991 | * or tasklet |
992 | */ |
993 | pmcraid_send_cmd(cmd, pmcraid_querycfg, |
994 | PMCRAID_INTERNAL_TIMEOUT, |
995 | pmcraid_timeout_handler); |
996 | } |
997 | |
998 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd); |
999 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd); |
1000 | |
1001 | /** |
1002 | * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA |
1003 | * |
1004 | * @cmd: initialized command block pointer |
1005 | * |
1006 | * Return Value |
1007 | * none |
1008 | */ |
1009 | static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd) |
1010 | { |
1011 | if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE) |
1012 | atomic_set(&(cmd->drv_inst->ccn.ignore), 0); |
1013 | else |
1014 | atomic_set(&(cmd->drv_inst->ldn.ignore), 0); |
1015 | |
1016 | pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL); |
1017 | } |
1018 | |
1019 | /** |
1020 | * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA |
1021 | * |
1022 | * @pinstance: pointer to adapter instance structure |
1023 | * @type: HCAM type |
1024 | * |
1025 | * Return Value |
1026 | * pointer to initialized pmcraid_cmd structure or NULL |
1027 | */ |
1028 | static struct pmcraid_cmd *pmcraid_init_hcam |
1029 | ( |
1030 | struct pmcraid_instance *pinstance, |
1031 | u8 type |
1032 | ) |
1033 | { |
1034 | struct pmcraid_cmd *cmd; |
1035 | struct pmcraid_ioarcb *ioarcb; |
1036 | struct pmcraid_ioadl_desc *ioadl; |
1037 | struct pmcraid_hostrcb *hcam; |
1038 | void (*cmd_done) (struct pmcraid_cmd *); |
1039 | dma_addr_t dma; |
1040 | int rcb_size; |
1041 | |
1042 | cmd = pmcraid_get_free_cmd(pinstance); |
1043 | |
1044 | if (!cmd) { |
1045 | pmcraid_err("no free command blocks for hcam\n"); |
1046 | return cmd; |
1047 | } |
1048 | |
1049 | if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) { |
1050 | rcb_size = sizeof(struct pmcraid_hcam_ccn); |
1051 | cmd_done = pmcraid_process_ccn; |
1052 | dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE; |
1053 | hcam = &pinstance->ccn; |
1054 | } else { |
1055 | rcb_size = sizeof(struct pmcraid_hcam_ldn); |
1056 | cmd_done = pmcraid_process_ldn; |
1057 | dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE; |
1058 | hcam = &pinstance->ldn; |
1059 | } |
1060 | |
1061 | /* initialize command pointer used for HCAM registration */ |
1062 | hcam->cmd = cmd; |
1063 | |
1064 | ioarcb = &cmd->ioa_cb->ioarcb; |
1065 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
1066 | offsetof(struct pmcraid_ioarcb, |
1067 | add_data.u.ioadl[0])); |
1068 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
1069 | ioadl = ioarcb->add_data.u.ioadl; |
1070 | |
1071 | /* Initialize ioarcb */ |
1072 | ioarcb->request_type = REQ_TYPE_HCAM; |
1073 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
1074 | ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC; |
1075 | ioarcb->cdb[1] = type; |
1076 | ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF; |
1077 | ioarcb->cdb[8] = (rcb_size) & 0xFF; |
1078 | |
1079 | ioarcb->data_transfer_length = cpu_to_le32(rcb_size); |
1080 | |
1081 | ioadl[0].flags |= IOADL_FLAGS_READ_LAST; |
1082 | ioadl[0].data_len = cpu_to_le32(rcb_size); |
1083 | ioadl[0].address = cpu_to_le32(dma); |
1084 | |
1085 | cmd->cmd_done = cmd_done; |
1086 | return cmd; |
1087 | } |
1088 | |
1089 | /** |
1090 | * pmcraid_send_hcam - Send an HCAM to IOA |
1091 | * @pinstance: ioa config struct |
1092 | * @type: HCAM type |
1093 | * |
1094 | * This function will send a Host Controlled Async command to IOA. |
1095 | * |
1096 | * Return value: |
1097 | * none |
1098 | */ |
1099 | static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type) |
1100 | { |
1101 | struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type); |
1102 | pmcraid_send_hcam_cmd(cmd); |
1103 | } |
1104 | |
1105 | |
1106 | /** |
1107 | * pmcraid_prepare_cancel_cmd - prepares a command block to abort another |
1108 | * |
1109 | * @cmd: pointer to cmd that is used as cancelling command |
1110 | * @cmd_to_cancel: pointer to the command that needs to be cancelled |
1111 | */ |
1112 | static void pmcraid_prepare_cancel_cmd( |
1113 | struct pmcraid_cmd *cmd, |
1114 | struct pmcraid_cmd *cmd_to_cancel |
1115 | ) |
1116 | { |
1117 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
1118 | __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr; |
1119 | |
1120 | /* Get the resource handle to where the command to be aborted has been |
1121 | * sent. |
1122 | */ |
1123 | ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle; |
1124 | ioarcb->request_type = REQ_TYPE_IOACMD; |
1125 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
1126 | ioarcb->cdb[0] = PMCRAID_ABORT_CMD; |
1127 | |
1128 | /* IOARCB address of the command to be cancelled is given in |
1129 | * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in |
1130 | * IOARCB address are not masked. |
1131 | */ |
1132 | ioarcb_addr = cpu_to_be64(ioarcb_addr); |
1133 | memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr)); |
1134 | } |
1135 | |
1136 | /** |
1137 | * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM |
1138 | * |
1139 | * @cmd: command to be used as cancelling command |
1140 | * @type: HCAM type |
1141 | * @cmd_done: op done function for the cancelling command |
1142 | */ |
1143 | static void pmcraid_cancel_hcam( |
1144 | struct pmcraid_cmd *cmd, |
1145 | u8 type, |
1146 | void (*cmd_done) (struct pmcraid_cmd *) |
1147 | ) |
1148 | { |
1149 | struct pmcraid_instance *pinstance; |
1150 | struct pmcraid_hostrcb *hcam; |
1151 | |
1152 | pinstance = cmd->drv_inst; |
1153 | hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ? |
1154 | &pinstance->ldn : &pinstance->ccn; |
1155 | |
1156 | /* prepare for cancelling previous hcam command. If the HCAM is |
1157 | * currently not pending with IOA, we would have hcam->cmd as non-null |
1158 | */ |
1159 | if (hcam->cmd == NULL) |
1160 | return; |
1161 | |
1162 | pmcraid_prepare_cancel_cmd(cmd, hcam->cmd); |
1163 | |
1164 | /* writing to IOARRIN must be protected by host_lock, as mid-layer |
1165 | * schedule queuecommand while we are doing this |
1166 | */ |
1167 | pmcraid_send_cmd(cmd, cmd_done, |
1168 | PMCRAID_INTERNAL_TIMEOUT, |
1169 | pmcraid_timeout_handler); |
1170 | } |
1171 | |
1172 | /** |
1173 | * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA |
1174 | * |
1175 | * @cmd: command block to be used for cancelling the HCAM |
1176 | */ |
1177 | static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd) |
1178 | { |
1179 | pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n", |
1180 | cmd->ioa_cb->ioarcb.cdb[0], |
1181 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
1182 | |
1183 | pmcraid_reinit_cmdblk(cmd); |
1184 | |
1185 | pmcraid_cancel_hcam(cmd, |
1186 | PMCRAID_HCAM_CODE_CONFIG_CHANGE, |
1187 | pmcraid_ioa_shutdown); |
1188 | } |
1189 | |
1190 | /** |
1191 | * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA |
1192 | * |
1193 | * @cmd: command block to be used for cancelling the HCAM |
1194 | */ |
1195 | static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd) |
1196 | { |
1197 | pmcraid_cancel_hcam(cmd, |
1198 | PMCRAID_HCAM_CODE_LOG_DATA, |
1199 | pmcraid_cancel_ccn); |
1200 | } |
1201 | |
1202 | /** |
1203 | * pmcraid_expose_resource - check if the resource can be exposed to OS |
1204 | * |
1205 | * @cfgte: pointer to configuration table entry of the resource |
1206 | * |
1207 | * Return value: |
1208 | * true if resource can be added to midlayer, false(0) otherwise |
1209 | */ |
1210 | static int pmcraid_expose_resource(struct pmcraid_config_table_entry *cfgte) |
1211 | { |
1212 | int retval = 0; |
1213 | |
1214 | if (cfgte->resource_type == RES_TYPE_VSET) |
1215 | retval = ((cfgte->unique_flags1 & 0x80) == 0); |
1216 | else if (cfgte->resource_type == RES_TYPE_GSCSI) |
1217 | retval = (RES_BUS(cfgte->resource_address) != |
1218 | PMCRAID_VIRTUAL_ENCL_BUS_ID); |
1219 | return retval; |
1220 | } |
1221 | |
1222 | /* attributes supported by pmcraid_event_family */ |
1223 | enum { |
1224 | PMCRAID_AEN_ATTR_UNSPEC, |
1225 | PMCRAID_AEN_ATTR_EVENT, |
1226 | __PMCRAID_AEN_ATTR_MAX, |
1227 | }; |
1228 | #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1) |
1229 | |
1230 | /* commands supported by pmcraid_event_family */ |
1231 | enum { |
1232 | PMCRAID_AEN_CMD_UNSPEC, |
1233 | PMCRAID_AEN_CMD_EVENT, |
1234 | __PMCRAID_AEN_CMD_MAX, |
1235 | }; |
1236 | #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1) |
1237 | |
1238 | static struct genl_family pmcraid_event_family = { |
1239 | .id = GENL_ID_GENERATE, |
1240 | .name = "pmcraid", |
1241 | .version = 1, |
1242 | .maxattr = PMCRAID_AEN_ATTR_MAX |
1243 | }; |
1244 | |
1245 | /** |
1246 | * pmcraid_netlink_init - registers pmcraid_event_family |
1247 | * |
1248 | * Return value: |
1249 | * 0 if the pmcraid_event_family is successfully registered |
1250 | * with netlink generic, non-zero otherwise |
1251 | */ |
1252 | static int pmcraid_netlink_init(void) |
1253 | { |
1254 | int result; |
1255 | |
1256 | result = genl_register_family(&pmcraid_event_family); |
1257 | |
1258 | if (result) |
1259 | return result; |
1260 | |
1261 | pmcraid_info("registered NETLINK GENERIC group: %d\n", |
1262 | pmcraid_event_family.id); |
1263 | |
1264 | return result; |
1265 | } |
1266 | |
1267 | /** |
1268 | * pmcraid_netlink_release - unregisters pmcraid_event_family |
1269 | * |
1270 | * Return value: |
1271 | * none |
1272 | */ |
1273 | static void pmcraid_netlink_release(void) |
1274 | { |
1275 | genl_unregister_family(&pmcraid_event_family); |
1276 | } |
1277 | |
1278 | /** |
1279 | * pmcraid_notify_aen - sends event msg to user space application |
1280 | * @pinstance: pointer to adapter instance structure |
1281 | * @type: HCAM type |
1282 | * |
1283 | * Return value: |
1284 | * 0 if success, error value in case of any failure. |
1285 | */ |
1286 | static int pmcraid_notify_aen(struct pmcraid_instance *pinstance, u8 type) |
1287 | { |
1288 | struct sk_buff *skb; |
1289 | struct pmcraid_aen_msg *aen_msg; |
1290 | void *msg_header; |
1291 | int data_size, total_size; |
1292 | int result; |
1293 | |
1294 | |
1295 | if (type == PMCRAID_HCAM_CODE_LOG_DATA) { |
1296 | aen_msg = pinstance->ldn.msg; |
1297 | data_size = pinstance->ldn.hcam->data_len; |
1298 | } else { |
1299 | aen_msg = pinstance->ccn.msg; |
1300 | data_size = pinstance->ccn.hcam->data_len; |
1301 | } |
1302 | |
1303 | data_size += sizeof(struct pmcraid_hcam_hdr); |
1304 | aen_msg->hostno = (pinstance->host->unique_id << 16 | |
1305 | MINOR(pinstance->cdev.dev)); |
1306 | aen_msg->length = data_size; |
1307 | data_size += sizeof(*aen_msg); |
1308 | |
1309 | total_size = nla_total_size(data_size); |
1310 | skb = genlmsg_new(total_size, GFP_ATOMIC); |
1311 | |
1312 | |
1313 | if (!skb) { |
1314 | pmcraid_err("Failed to allocate aen data SKB of size: %x\n", |
1315 | total_size); |
1316 | return -ENOMEM; |
1317 | } |
1318 | |
1319 | /* add the genetlink message header */ |
1320 | msg_header = genlmsg_put(skb, 0, 0, |
1321 | &pmcraid_event_family, 0, |
1322 | PMCRAID_AEN_CMD_EVENT); |
1323 | if (!msg_header) { |
1324 | pmcraid_err("failed to copy command details\n"); |
1325 | nlmsg_free(skb); |
1326 | return -ENOMEM; |
1327 | } |
1328 | |
1329 | result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg); |
1330 | |
1331 | if (result) { |
1332 | pmcraid_err("failed to copy AEN attribute data \n"); |
1333 | nlmsg_free(skb); |
1334 | return -EINVAL; |
1335 | } |
1336 | |
1337 | /* send genetlink multicast message to notify appplications */ |
1338 | result = genlmsg_end(skb, msg_header); |
1339 | |
1340 | if (result < 0) { |
1341 | pmcraid_err("genlmsg_end failed\n"); |
1342 | nlmsg_free(skb); |
1343 | return result; |
1344 | } |
1345 | |
1346 | result = |
1347 | genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC); |
1348 | |
1349 | /* If there are no listeners, genlmsg_multicast may return non-zero |
1350 | * value. |
1351 | */ |
1352 | if (result) |
1353 | pmcraid_info("failed to send %s event message %x!\n", |
1354 | type == PMCRAID_HCAM_CODE_LOG_DATA ? "LDN" : "CCN", |
1355 | result); |
1356 | return result; |
1357 | } |
1358 | |
1359 | /** |
1360 | * pmcraid_handle_config_change - Handle a config change from the adapter |
1361 | * @pinstance: pointer to per adapter instance structure |
1362 | * |
1363 | * Return value: |
1364 | * none |
1365 | */ |
1366 | |
1367 | static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance) |
1368 | { |
1369 | struct pmcraid_config_table_entry *cfg_entry; |
1370 | struct pmcraid_hcam_ccn *ccn_hcam; |
1371 | struct pmcraid_cmd *cmd; |
1372 | struct pmcraid_cmd *cfgcmd; |
1373 | struct pmcraid_resource_entry *res = NULL; |
1374 | unsigned long lock_flags; |
1375 | unsigned long host_lock_flags; |
1376 | u32 new_entry = 1; |
1377 | u32 hidden_entry = 0; |
1378 | int rc; |
1379 | |
1380 | ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam; |
1381 | cfg_entry = &ccn_hcam->cfg_entry; |
1382 | |
1383 | pmcraid_info |
1384 | ("CCN(%x): %x type: %x lost: %x flags: %x res: %x:%x:%x:%x\n", |
1385 | pinstance->ccn.hcam->ilid, |
1386 | pinstance->ccn.hcam->op_code, |
1387 | pinstance->ccn.hcam->notification_type, |
1388 | pinstance->ccn.hcam->notification_lost, |
1389 | pinstance->ccn.hcam->flags, |
1390 | pinstance->host->unique_id, |
1391 | RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID : |
1392 | (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID : |
1393 | RES_BUS(cfg_entry->resource_address)), |
1394 | RES_IS_VSET(*cfg_entry) ? cfg_entry->unique_flags1 : |
1395 | RES_TARGET(cfg_entry->resource_address), |
1396 | RES_LUN(cfg_entry->resource_address)); |
1397 | |
1398 | |
1399 | /* If this HCAM indicates a lost notification, read the config table */ |
1400 | if (pinstance->ccn.hcam->notification_lost) { |
1401 | cfgcmd = pmcraid_get_free_cmd(pinstance); |
1402 | if (cfgcmd) { |
1403 | pmcraid_info("lost CCN, reading config table\b"); |
1404 | pinstance->reinit_cfg_table = 1; |
1405 | pmcraid_querycfg(cfgcmd); |
1406 | } else { |
1407 | pmcraid_err("lost CCN, no free cmd for querycfg\n"); |
1408 | } |
1409 | goto out_notify_apps; |
1410 | } |
1411 | |
1412 | /* If this resource is not going to be added to mid-layer, just notify |
1413 | * applications and return. If this notification is about hiding a VSET |
1414 | * resource, check if it was exposed already. |
1415 | */ |
1416 | if (pinstance->ccn.hcam->notification_type == |
1417 | NOTIFICATION_TYPE_ENTRY_CHANGED && |
1418 | cfg_entry->resource_type == RES_TYPE_VSET && |
1419 | cfg_entry->unique_flags1 & 0x80) { |
1420 | hidden_entry = 1; |
1421 | } else if (!pmcraid_expose_resource(cfg_entry)) |
1422 | goto out_notify_apps; |
1423 | |
1424 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
1425 | list_for_each_entry(res, &pinstance->used_res_q, queue) { |
1426 | rc = memcmp(&res->cfg_entry.resource_address, |
1427 | &cfg_entry->resource_address, |
1428 | sizeof(cfg_entry->resource_address)); |
1429 | if (!rc) { |
1430 | new_entry = 0; |
1431 | break; |
1432 | } |
1433 | } |
1434 | |
1435 | if (new_entry) { |
1436 | |
1437 | if (hidden_entry) { |
1438 | spin_unlock_irqrestore(&pinstance->resource_lock, |
1439 | lock_flags); |
1440 | goto out_notify_apps; |
1441 | } |
1442 | |
1443 | /* If there are more number of resources than what driver can |
1444 | * manage, do not notify the applications about the CCN. Just |
1445 | * ignore this notifications and re-register the same HCAM |
1446 | */ |
1447 | if (list_empty(&pinstance->free_res_q)) { |
1448 | spin_unlock_irqrestore(&pinstance->resource_lock, |
1449 | lock_flags); |
1450 | pmcraid_err("too many resources attached\n"); |
1451 | spin_lock_irqsave(pinstance->host->host_lock, |
1452 | host_lock_flags); |
1453 | pmcraid_send_hcam(pinstance, |
1454 | PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
1455 | spin_unlock_irqrestore(pinstance->host->host_lock, |
1456 | host_lock_flags); |
1457 | return; |
1458 | } |
1459 | |
1460 | res = list_entry(pinstance->free_res_q.next, |
1461 | struct pmcraid_resource_entry, queue); |
1462 | |
1463 | list_del(&res->queue); |
1464 | res->scsi_dev = NULL; |
1465 | res->reset_progress = 0; |
1466 | list_add_tail(&res->queue, &pinstance->used_res_q); |
1467 | } |
1468 | |
1469 | memcpy(&res->cfg_entry, cfg_entry, |
1470 | sizeof(struct pmcraid_config_table_entry)); |
1471 | |
1472 | if (pinstance->ccn.hcam->notification_type == |
1473 | NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) { |
1474 | if (res->scsi_dev) { |
1475 | res->cfg_entry.unique_flags1 &= 0x7F; |
1476 | res->change_detected = RES_CHANGE_DEL; |
1477 | res->cfg_entry.resource_handle = |
1478 | PMCRAID_INVALID_RES_HANDLE; |
1479 | schedule_work(&pinstance->worker_q); |
1480 | } else { |
1481 | /* This may be one of the non-exposed resources */ |
1482 | list_move_tail(&res->queue, &pinstance->free_res_q); |
1483 | } |
1484 | } else if (!res->scsi_dev) { |
1485 | res->change_detected = RES_CHANGE_ADD; |
1486 | schedule_work(&pinstance->worker_q); |
1487 | } |
1488 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
1489 | |
1490 | out_notify_apps: |
1491 | |
1492 | /* Notify configuration changes to registered applications.*/ |
1493 | if (!pmcraid_disable_aen) |
1494 | pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
1495 | |
1496 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
1497 | if (cmd) |
1498 | pmcraid_send_hcam_cmd(cmd); |
1499 | } |
1500 | |
1501 | /** |
1502 | * pmcraid_get_error_info - return error string for an ioasc |
1503 | * @ioasc: ioasc code |
1504 | * Return Value |
1505 | * none |
1506 | */ |
1507 | static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc) |
1508 | { |
1509 | int i; |
1510 | for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) { |
1511 | if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc) |
1512 | return &pmcraid_ioasc_error_table[i]; |
1513 | } |
1514 | return NULL; |
1515 | } |
1516 | |
1517 | /** |
1518 | * pmcraid_ioasc_logger - log IOASC information based user-settings |
1519 | * @ioasc: ioasc code |
1520 | * @cmd: pointer to command that resulted in 'ioasc' |
1521 | */ |
1522 | void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd) |
1523 | { |
1524 | struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc); |
1525 | |
1526 | if (error_info == NULL || |
1527 | cmd->drv_inst->current_log_level < error_info->log_level) |
1528 | return; |
1529 | |
1530 | /* log the error string */ |
1531 | pmcraid_err("cmd [%d] for resource %x failed with %x(%s)\n", |
1532 | cmd->ioa_cb->ioarcb.cdb[0], |
1533 | cmd->ioa_cb->ioarcb.resource_handle, |
1534 | le32_to_cpu(ioasc), error_info->error_string); |
1535 | } |
1536 | |
1537 | /** |
1538 | * pmcraid_handle_error_log - Handle a config change (error log) from the IOA |
1539 | * |
1540 | * @pinstance: pointer to per adapter instance structure |
1541 | * |
1542 | * Return value: |
1543 | * none |
1544 | */ |
1545 | static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance) |
1546 | { |
1547 | struct pmcraid_hcam_ldn *hcam_ldn; |
1548 | u32 ioasc; |
1549 | |
1550 | hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; |
1551 | |
1552 | pmcraid_info |
1553 | ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n", |
1554 | pinstance->ldn.hcam->ilid, |
1555 | pinstance->ldn.hcam->op_code, |
1556 | pinstance->ldn.hcam->notification_type, |
1557 | pinstance->ldn.hcam->notification_lost, |
1558 | pinstance->ldn.hcam->flags, |
1559 | pinstance->ldn.hcam->overlay_id); |
1560 | |
1561 | /* log only the errors, no need to log informational log entries */ |
1562 | if (pinstance->ldn.hcam->notification_type != |
1563 | NOTIFICATION_TYPE_ERROR_LOG) |
1564 | return; |
1565 | |
1566 | if (pinstance->ldn.hcam->notification_lost == |
1567 | HOSTRCB_NOTIFICATIONS_LOST) |
1568 | dev_info(&pinstance->pdev->dev, "Error notifications lost\n"); |
1569 | |
1570 | ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc); |
1571 | |
1572 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || |
1573 | ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) { |
1574 | dev_info(&pinstance->pdev->dev, |
1575 | "UnitAttention due to IOA Bus Reset\n"); |
1576 | scsi_report_bus_reset( |
1577 | pinstance->host, |
1578 | RES_BUS(hcam_ldn->error_log.fd_ra)); |
1579 | } |
1580 | |
1581 | return; |
1582 | } |
1583 | |
1584 | /** |
1585 | * pmcraid_process_ccn - Op done function for a CCN. |
1586 | * @cmd: pointer to command struct |
1587 | * |
1588 | * This function is the op done function for a configuration |
1589 | * change notification |
1590 | * |
1591 | * Return value: |
1592 | * none |
1593 | */ |
1594 | static void pmcraid_process_ccn(struct pmcraid_cmd *cmd) |
1595 | { |
1596 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1597 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
1598 | unsigned long lock_flags; |
1599 | |
1600 | pinstance->ccn.cmd = NULL; |
1601 | pmcraid_return_cmd(cmd); |
1602 | |
1603 | /* If driver initiated IOA reset happened while this hcam was pending |
1604 | * with IOA, or IOA bringdown sequence is in progress, no need to |
1605 | * re-register the hcam |
1606 | */ |
1607 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
1608 | atomic_read(&pinstance->ccn.ignore) == 1) { |
1609 | return; |
1610 | } else if (ioasc) { |
1611 | dev_info(&pinstance->pdev->dev, |
1612 | "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc); |
1613 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
1614 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
1615 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
1616 | } else { |
1617 | pmcraid_handle_config_change(pinstance); |
1618 | } |
1619 | } |
1620 | |
1621 | /** |
1622 | * pmcraid_process_ldn - op done function for an LDN |
1623 | * @cmd: pointer to command block |
1624 | * |
1625 | * Return value |
1626 | * none |
1627 | */ |
1628 | static void pmcraid_initiate_reset(struct pmcraid_instance *); |
1629 | |
1630 | static void pmcraid_process_ldn(struct pmcraid_cmd *cmd) |
1631 | { |
1632 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1633 | struct pmcraid_hcam_ldn *ldn_hcam = |
1634 | (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; |
1635 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
1636 | u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc); |
1637 | unsigned long lock_flags; |
1638 | |
1639 | /* return the command block back to freepool */ |
1640 | pinstance->ldn.cmd = NULL; |
1641 | pmcraid_return_cmd(cmd); |
1642 | |
1643 | /* If driver initiated IOA reset happened while this hcam was pending |
1644 | * with IOA, no need to re-register the hcam as reset engine will do it |
1645 | * once reset sequence is complete |
1646 | */ |
1647 | if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
1648 | atomic_read(&pinstance->ccn.ignore) == 1) { |
1649 | return; |
1650 | } else if (!ioasc) { |
1651 | pmcraid_handle_error_log(pinstance); |
1652 | if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) { |
1653 | spin_lock_irqsave(pinstance->host->host_lock, |
1654 | lock_flags); |
1655 | pmcraid_initiate_reset(pinstance); |
1656 | spin_unlock_irqrestore(pinstance->host->host_lock, |
1657 | lock_flags); |
1658 | return; |
1659 | } |
1660 | } else { |
1661 | dev_info(&pinstance->pdev->dev, |
1662 | "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc); |
1663 | } |
1664 | /* send netlink message for HCAM notification if enabled */ |
1665 | if (!pmcraid_disable_aen) |
1666 | pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
1667 | |
1668 | cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
1669 | if (cmd) |
1670 | pmcraid_send_hcam_cmd(cmd); |
1671 | } |
1672 | |
1673 | /** |
1674 | * pmcraid_register_hcams - register HCAMs for CCN and LDN |
1675 | * |
1676 | * @pinstance: pointer per adapter instance structure |
1677 | * |
1678 | * Return Value |
1679 | * none |
1680 | */ |
1681 | static void pmcraid_register_hcams(struct pmcraid_instance *pinstance) |
1682 | { |
1683 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
1684 | pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
1685 | } |
1686 | |
1687 | /** |
1688 | * pmcraid_unregister_hcams - cancel HCAMs registered already |
1689 | * @cmd: pointer to command used as part of reset sequence |
1690 | */ |
1691 | static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd) |
1692 | { |
1693 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1694 | |
1695 | /* During IOA bringdown, HCAM gets fired and tasklet proceeds with |
1696 | * handling hcam response though it is not necessary. In order to |
1697 | * prevent this, set 'ignore', so that bring-down sequence doesn't |
1698 | * re-send any more hcams |
1699 | */ |
1700 | atomic_set(&pinstance->ccn.ignore, 1); |
1701 | atomic_set(&pinstance->ldn.ignore, 1); |
1702 | |
1703 | /* If adapter reset was forced as part of runtime reset sequence, |
1704 | * start the reset sequence. |
1705 | */ |
1706 | if (pinstance->force_ioa_reset && !pinstance->ioa_bringdown) { |
1707 | pinstance->force_ioa_reset = 0; |
1708 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
1709 | pmcraid_reset_alert(cmd); |
1710 | return; |
1711 | } |
1712 | |
1713 | /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM |
1714 | * one after the other. So CCN cancellation will be triggered by |
1715 | * pmcraid_cancel_ldn itself. |
1716 | */ |
1717 | pmcraid_cancel_ldn(cmd); |
1718 | } |
1719 | |
1720 | /** |
1721 | * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset |
1722 | * @pinstance: pointer to adapter instance structure |
1723 | * Return Value |
1724 | * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0 |
1725 | */ |
1726 | static void pmcraid_reinit_buffers(struct pmcraid_instance *); |
1727 | |
1728 | static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance) |
1729 | { |
1730 | u32 intrs; |
1731 | |
1732 | pmcraid_reinit_buffers(pinstance); |
1733 | intrs = pmcraid_read_interrupts(pinstance); |
1734 | |
1735 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
1736 | |
1737 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) { |
1738 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
1739 | pinstance->int_regs.ioa_host_interrupt_mask_reg); |
1740 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
1741 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
1742 | return 1; |
1743 | } else { |
1744 | return 0; |
1745 | } |
1746 | } |
1747 | |
1748 | /** |
1749 | * pmcraid_soft_reset - performs a soft reset and makes IOA become ready |
1750 | * @cmd : pointer to reset command block |
1751 | * |
1752 | * Return Value |
1753 | * none |
1754 | */ |
1755 | static void pmcraid_soft_reset(struct pmcraid_cmd *cmd) |
1756 | { |
1757 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1758 | u32 int_reg; |
1759 | u32 doorbell; |
1760 | |
1761 | /* There will be an interrupt when Transition to Operational bit is |
1762 | * set so tasklet would execute next reset task. The timeout handler |
1763 | * would re-initiate a reset |
1764 | */ |
1765 | cmd->cmd_done = pmcraid_ioa_reset; |
1766 | cmd->timer.data = (unsigned long)cmd; |
1767 | cmd->timer.expires = jiffies + |
1768 | msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT); |
1769 | cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler; |
1770 | |
1771 | if (!timer_pending(&cmd->timer)) |
1772 | add_timer(&cmd->timer); |
1773 | |
1774 | /* Enable destructive diagnostics on IOA if it is not yet in |
1775 | * operational state |
1776 | */ |
1777 | doorbell = DOORBELL_RUNTIME_RESET | |
1778 | DOORBELL_ENABLE_DESTRUCTIVE_DIAGS; |
1779 | |
1780 | iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg); |
1781 | int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
1782 | pmcraid_info("Waiting for IOA to become operational %x:%x\n", |
1783 | ioread32(pinstance->int_regs.host_ioa_interrupt_reg), |
1784 | int_reg); |
1785 | } |
1786 | |
1787 | /** |
1788 | * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt |
1789 | * |
1790 | * @pinstance: pointer to adapter instance structure |
1791 | * |
1792 | * Return Value |
1793 | * none |
1794 | */ |
1795 | static void pmcraid_get_dump(struct pmcraid_instance *pinstance) |
1796 | { |
1797 | pmcraid_info("%s is not yet implemented\n", __func__); |
1798 | } |
1799 | |
1800 | /** |
1801 | * pmcraid_fail_outstanding_cmds - Fails all outstanding ops. |
1802 | * @pinstance: pointer to adapter instance structure |
1803 | * |
1804 | * This function fails all outstanding ops. If they are submitted to IOA |
1805 | * already, it sends cancel all messages if IOA is still accepting IOARCBs, |
1806 | * otherwise just completes the commands and returns the cmd blocks to free |
1807 | * pool. |
1808 | * |
1809 | * Return value: |
1810 | * none |
1811 | */ |
1812 | static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance) |
1813 | { |
1814 | struct pmcraid_cmd *cmd, *temp; |
1815 | unsigned long lock_flags; |
1816 | |
1817 | /* pending command list is protected by pending_pool_lock. Its |
1818 | * traversal must be done as within this lock |
1819 | */ |
1820 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
1821 | list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool, |
1822 | free_list) { |
1823 | list_del(&cmd->free_list); |
1824 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
1825 | lock_flags); |
1826 | cmd->ioa_cb->ioasa.ioasc = |
1827 | cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET); |
1828 | cmd->ioa_cb->ioasa.ilid = |
1829 | cpu_to_be32(PMCRAID_DRIVER_ILID); |
1830 | |
1831 | /* In case the command timer is still running */ |
1832 | del_timer(&cmd->timer); |
1833 | |
1834 | /* If this is an IO command, complete it by invoking scsi_done |
1835 | * function. If this is one of the internal commands other |
1836 | * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to |
1837 | * complete it |
1838 | */ |
1839 | if (cmd->scsi_cmd) { |
1840 | |
1841 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
1842 | __le32 resp = cmd->ioa_cb->ioarcb.response_handle; |
1843 | |
1844 | scsi_cmd->result |= DID_ERROR << 16; |
1845 | |
1846 | scsi_dma_unmap(scsi_cmd); |
1847 | pmcraid_return_cmd(cmd); |
1848 | |
1849 | pmcraid_info("failing(%d) CDB[0] = %x result: %x\n", |
1850 | le32_to_cpu(resp) >> 2, |
1851 | cmd->ioa_cb->ioarcb.cdb[0], |
1852 | scsi_cmd->result); |
1853 | scsi_cmd->scsi_done(scsi_cmd); |
1854 | } else if (cmd->cmd_done == pmcraid_internal_done || |
1855 | cmd->cmd_done == pmcraid_erp_done) { |
1856 | cmd->cmd_done(cmd); |
1857 | } else if (cmd->cmd_done != pmcraid_ioa_reset) { |
1858 | pmcraid_return_cmd(cmd); |
1859 | } |
1860 | |
1861 | atomic_dec(&pinstance->outstanding_cmds); |
1862 | spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
1863 | } |
1864 | |
1865 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); |
1866 | } |
1867 | |
1868 | /** |
1869 | * pmcraid_ioa_reset - Implementation of IOA reset logic |
1870 | * |
1871 | * @cmd: pointer to the cmd block to be used for entire reset process |
1872 | * |
1873 | * This function executes most of the steps required for IOA reset. This gets |
1874 | * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's |
1875 | * 'eh_' thread. Access to variables used for controling the reset sequence is |
1876 | * synchronized using host lock. Various functions called during reset process |
1877 | * would make use of a single command block, pointer to which is also stored in |
1878 | * adapter instance structure. |
1879 | * |
1880 | * Return Value |
1881 | * None |
1882 | */ |
1883 | static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd) |
1884 | { |
1885 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
1886 | u8 reset_complete = 0; |
1887 | |
1888 | pinstance->ioa_reset_in_progress = 1; |
1889 | |
1890 | if (pinstance->reset_cmd != cmd) { |
1891 | pmcraid_err("reset is called with different command block\n"); |
1892 | pinstance->reset_cmd = cmd; |
1893 | } |
1894 | |
1895 | pmcraid_info("reset_engine: state = %d, command = %p\n", |
1896 | pinstance->ioa_state, cmd); |
1897 | |
1898 | switch (pinstance->ioa_state) { |
1899 | |
1900 | case IOA_STATE_DEAD: |
1901 | /* If IOA is offline, whatever may be the reset reason, just |
1902 | * return. callers might be waiting on the reset wait_q, wake |
1903 | * up them |
1904 | */ |
1905 | pmcraid_err("IOA is offline no reset is possible\n"); |
1906 | reset_complete = 1; |
1907 | break; |
1908 | |
1909 | case IOA_STATE_IN_BRINGDOWN: |
1910 | /* we enter here, once ioa shutdown command is processed by IOA |
1911 | * Alert IOA for a possible reset. If reset alert fails, IOA |
1912 | * goes through hard-reset |
1913 | */ |
1914 | pmcraid_disable_interrupts(pinstance, ~0); |
1915 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
1916 | pmcraid_reset_alert(cmd); |
1917 | break; |
1918 | |
1919 | case IOA_STATE_UNKNOWN: |
1920 | /* We may be called during probe or resume. Some pre-processing |
1921 | * is required for prior to reset |
1922 | */ |
1923 | scsi_block_requests(pinstance->host); |
1924 | |
1925 | /* If asked to reset while IOA was processing responses or |
1926 | * there are any error responses then IOA may require |
1927 | * hard-reset. |
1928 | */ |
1929 | if (pinstance->ioa_hard_reset == 0) { |
1930 | if (ioread32(pinstance->ioa_status) & |
1931 | INTRS_TRANSITION_TO_OPERATIONAL) { |
1932 | pmcraid_info("sticky bit set, bring-up\n"); |
1933 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
1934 | pmcraid_reinit_cmdblk(cmd); |
1935 | pmcraid_identify_hrrq(cmd); |
1936 | } else { |
1937 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; |
1938 | pmcraid_soft_reset(cmd); |
1939 | } |
1940 | } else { |
1941 | /* Alert IOA of a possible reset and wait for critical |
1942 | * operation in progress bit to reset |
1943 | */ |
1944 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
1945 | pmcraid_reset_alert(cmd); |
1946 | } |
1947 | break; |
1948 | |
1949 | case IOA_STATE_IN_RESET_ALERT: |
1950 | /* If critical operation in progress bit is reset or wait gets |
1951 | * timed out, reset proceeds with starting BIST on the IOA. |
1952 | * pmcraid_ioa_hard_reset keeps a count of reset attempts. If |
1953 | * they are 3 or more, reset engine marks IOA dead and returns |
1954 | */ |
1955 | pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; |
1956 | pmcraid_start_bist(cmd); |
1957 | break; |
1958 | |
1959 | case IOA_STATE_IN_HARD_RESET: |
1960 | pinstance->ioa_reset_attempts++; |
1961 | |
1962 | /* retry reset if we haven't reached maximum allowed limit */ |
1963 | if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) { |
1964 | pinstance->ioa_reset_attempts = 0; |
1965 | pmcraid_err("IOA didn't respond marking it as dead\n"); |
1966 | pinstance->ioa_state = IOA_STATE_DEAD; |
1967 | reset_complete = 1; |
1968 | break; |
1969 | } |
1970 | |
1971 | /* Once either bist or pci reset is done, restore PCI config |
1972 | * space. If this fails, proceed with hard reset again |
1973 | */ |
1974 | |
1975 | if (pci_restore_state(pinstance->pdev)) { |
1976 | pmcraid_info("config-space error resetting again\n"); |
1977 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
1978 | pmcraid_reset_alert(cmd); |
1979 | break; |
1980 | } |
1981 | |
1982 | /* fail all pending commands */ |
1983 | pmcraid_fail_outstanding_cmds(pinstance); |
1984 | |
1985 | /* check if unit check is active, if so extract dump */ |
1986 | if (pinstance->ioa_unit_check) { |
1987 | pmcraid_info("unit check is active\n"); |
1988 | pinstance->ioa_unit_check = 0; |
1989 | pmcraid_get_dump(pinstance); |
1990 | pinstance->ioa_reset_attempts--; |
1991 | pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
1992 | pmcraid_reset_alert(cmd); |
1993 | break; |
1994 | } |
1995 | |
1996 | /* if the reset reason is to bring-down the ioa, we might be |
1997 | * done with the reset restore pci_config_space and complete |
1998 | * the reset |
1999 | */ |
2000 | if (pinstance->ioa_bringdown) { |
2001 | pmcraid_info("bringing down the adapter\n"); |
2002 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
2003 | pinstance->ioa_bringdown = 0; |
2004 | pinstance->ioa_state = IOA_STATE_UNKNOWN; |
2005 | reset_complete = 1; |
2006 | } else { |
2007 | /* bring-up IOA, so proceed with soft reset |
2008 | * Reinitialize hrrq_buffers and their indices also |
2009 | * enable interrupts after a pci_restore_state |
2010 | */ |
2011 | if (pmcraid_reset_enable_ioa(pinstance)) { |
2012 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
2013 | pmcraid_info("bringing up the adapter\n"); |
2014 | pmcraid_reinit_cmdblk(cmd); |
2015 | pmcraid_identify_hrrq(cmd); |
2016 | } else { |
2017 | pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; |
2018 | pmcraid_soft_reset(cmd); |
2019 | } |
2020 | } |
2021 | break; |
2022 | |
2023 | case IOA_STATE_IN_SOFT_RESET: |
2024 | /* TRANSITION TO OPERATIONAL is on so start initialization |
2025 | * sequence |
2026 | */ |
2027 | pmcraid_info("In softreset proceeding with bring-up\n"); |
2028 | pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
2029 | |
2030 | /* Initialization commands start with HRRQ identification. From |
2031 | * now on tasklet completes most of the commands as IOA is up |
2032 | * and intrs are enabled |
2033 | */ |
2034 | pmcraid_identify_hrrq(cmd); |
2035 | break; |
2036 | |
2037 | case IOA_STATE_IN_BRINGUP: |
2038 | /* we are done with bringing up of IOA, change the ioa_state to |
2039 | * operational and wake up any waiters |
2040 | */ |
2041 | pinstance->ioa_state = IOA_STATE_OPERATIONAL; |
2042 | reset_complete = 1; |
2043 | break; |
2044 | |
2045 | case IOA_STATE_OPERATIONAL: |
2046 | default: |
2047 | /* When IOA is operational and a reset is requested, check for |
2048 | * the reset reason. If reset is to bring down IOA, unregister |
2049 | * HCAMs and initiate shutdown; if adapter reset is forced then |
2050 | * restart reset sequence again |
2051 | */ |
2052 | if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE && |
2053 | pinstance->force_ioa_reset == 0) { |
2054 | reset_complete = 1; |
2055 | } else { |
2056 | if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE) |
2057 | pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN; |
2058 | pmcraid_reinit_cmdblk(cmd); |
2059 | pmcraid_unregister_hcams(cmd); |
2060 | } |
2061 | break; |
2062 | } |
2063 | |
2064 | /* reset will be completed if ioa_state is either DEAD or UNKNOWN or |
2065 | * OPERATIONAL. Reset all control variables used during reset, wake up |
2066 | * any waiting threads and let the SCSI mid-layer send commands. Note |
2067 | * that host_lock must be held before invoking scsi_report_bus_reset. |
2068 | */ |
2069 | if (reset_complete) { |
2070 | pinstance->ioa_reset_in_progress = 0; |
2071 | pinstance->ioa_reset_attempts = 0; |
2072 | pinstance->reset_cmd = NULL; |
2073 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
2074 | pinstance->ioa_bringdown = 0; |
2075 | pmcraid_return_cmd(cmd); |
2076 | |
2077 | /* If target state is to bring up the adapter, proceed with |
2078 | * hcam registration and resource exposure to mid-layer. |
2079 | */ |
2080 | if (pinstance->ioa_state == IOA_STATE_OPERATIONAL) |
2081 | pmcraid_register_hcams(pinstance); |
2082 | |
2083 | wake_up_all(&pinstance->reset_wait_q); |
2084 | } |
2085 | |
2086 | return; |
2087 | } |
2088 | |
2089 | /** |
2090 | * pmcraid_initiate_reset - initiates reset sequence. This is called from |
2091 | * ISR/tasklet during error interrupts including IOA unit check. If reset |
2092 | * is already in progress, it just returns, otherwise initiates IOA reset |
2093 | * to bring IOA up to operational state. |
2094 | * |
2095 | * @pinstance: pointer to adapter instance structure |
2096 | * |
2097 | * Return value |
2098 | * none |
2099 | */ |
2100 | static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance) |
2101 | { |
2102 | struct pmcraid_cmd *cmd; |
2103 | |
2104 | /* If the reset is already in progress, just return, otherwise start |
2105 | * reset sequence and return |
2106 | */ |
2107 | if (!pinstance->ioa_reset_in_progress) { |
2108 | scsi_block_requests(pinstance->host); |
2109 | cmd = pmcraid_get_free_cmd(pinstance); |
2110 | |
2111 | if (cmd == NULL) { |
2112 | pmcraid_err("no cmnd blocks for initiate_reset\n"); |
2113 | return; |
2114 | } |
2115 | |
2116 | pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
2117 | pinstance->reset_cmd = cmd; |
2118 | pinstance->force_ioa_reset = 1; |
2119 | pmcraid_ioa_reset(cmd); |
2120 | } |
2121 | } |
2122 | |
2123 | /** |
2124 | * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup |
2125 | * or bringdown IOA |
2126 | * @pinstance: pointer adapter instance structure |
2127 | * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV |
2128 | * @target_state: expected target state after reset |
2129 | * |
2130 | * Note: This command initiates reset and waits for its completion. Hence this |
2131 | * should not be called from isr/timer/tasklet functions (timeout handlers, |
2132 | * error response handlers and interrupt handlers). |
2133 | * |
2134 | * Return Value |
2135 | * 1 in case ioa_state is not target_state, 0 otherwise. |
2136 | */ |
2137 | static int pmcraid_reset_reload( |
2138 | struct pmcraid_instance *pinstance, |
2139 | u8 shutdown_type, |
2140 | u8 target_state |
2141 | ) |
2142 | { |
2143 | struct pmcraid_cmd *reset_cmd = NULL; |
2144 | unsigned long lock_flags; |
2145 | int reset = 1; |
2146 | |
2147 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
2148 | |
2149 | if (pinstance->ioa_reset_in_progress) { |
2150 | pmcraid_info("reset_reload: reset is already in progress\n"); |
2151 | |
2152 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2153 | |
2154 | wait_event(pinstance->reset_wait_q, |
2155 | !pinstance->ioa_reset_in_progress); |
2156 | |
2157 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
2158 | |
2159 | if (pinstance->ioa_state == IOA_STATE_DEAD) { |
2160 | spin_unlock_irqrestore(pinstance->host->host_lock, |
2161 | lock_flags); |
2162 | pmcraid_info("reset_reload: IOA is dead\n"); |
2163 | return reset; |
2164 | } else if (pinstance->ioa_state == target_state) { |
2165 | reset = 0; |
2166 | } |
2167 | } |
2168 | |
2169 | if (reset) { |
2170 | pmcraid_info("reset_reload: proceeding with reset\n"); |
2171 | scsi_block_requests(pinstance->host); |
2172 | reset_cmd = pmcraid_get_free_cmd(pinstance); |
2173 | |
2174 | if (reset_cmd == NULL) { |
2175 | pmcraid_err("no free cmnd for reset_reload\n"); |
2176 | spin_unlock_irqrestore(pinstance->host->host_lock, |
2177 | lock_flags); |
2178 | return reset; |
2179 | } |
2180 | |
2181 | if (shutdown_type == SHUTDOWN_NORMAL) |
2182 | pinstance->ioa_bringdown = 1; |
2183 | |
2184 | pinstance->ioa_shutdown_type = shutdown_type; |
2185 | pinstance->reset_cmd = reset_cmd; |
2186 | pinstance->force_ioa_reset = reset; |
2187 | pmcraid_info("reset_reload: initiating reset\n"); |
2188 | pmcraid_ioa_reset(reset_cmd); |
2189 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2190 | pmcraid_info("reset_reload: waiting for reset to complete\n"); |
2191 | wait_event(pinstance->reset_wait_q, |
2192 | !pinstance->ioa_reset_in_progress); |
2193 | |
2194 | pmcraid_info("reset_reload: reset is complete !! \n"); |
2195 | scsi_unblock_requests(pinstance->host); |
2196 | if (pinstance->ioa_state == target_state) |
2197 | reset = 0; |
2198 | } |
2199 | |
2200 | return reset; |
2201 | } |
2202 | |
2203 | /** |
2204 | * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA |
2205 | * |
2206 | * @pinstance: pointer to adapter instance structure |
2207 | * |
2208 | * Return Value |
2209 | * whatever is returned from pmcraid_reset_reload |
2210 | */ |
2211 | static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance) |
2212 | { |
2213 | return pmcraid_reset_reload(pinstance, |
2214 | SHUTDOWN_NORMAL, |
2215 | IOA_STATE_UNKNOWN); |
2216 | } |
2217 | |
2218 | /** |
2219 | * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA |
2220 | * |
2221 | * @pinstance: pointer to adapter instance structure |
2222 | * |
2223 | * Return Value |
2224 | * whatever is returned from pmcraid_reset_reload |
2225 | */ |
2226 | static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance) |
2227 | { |
2228 | return pmcraid_reset_reload(pinstance, |
2229 | SHUTDOWN_NONE, |
2230 | IOA_STATE_OPERATIONAL); |
2231 | } |
2232 | |
2233 | /** |
2234 | * pmcraid_request_sense - Send request sense to a device |
2235 | * @cmd: pmcraid command struct |
2236 | * |
2237 | * This function sends a request sense to a device as a result of a check |
2238 | * condition. This method re-uses the same command block that failed earlier. |
2239 | */ |
2240 | static void pmcraid_request_sense(struct pmcraid_cmd *cmd) |
2241 | { |
2242 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
2243 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
2244 | |
2245 | /* allocate DMAable memory for sense buffers */ |
2246 | cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev, |
2247 | SCSI_SENSE_BUFFERSIZE, |
2248 | &cmd->sense_buffer_dma); |
2249 | |
2250 | if (cmd->sense_buffer == NULL) { |
2251 | pmcraid_err |
2252 | ("couldn't allocate sense buffer for request sense\n"); |
2253 | pmcraid_erp_done(cmd); |
2254 | return; |
2255 | } |
2256 | |
2257 | /* re-use the command block */ |
2258 | memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa)); |
2259 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
2260 | ioarcb->request_flags0 = (SYNC_COMPLETE | |
2261 | NO_LINK_DESCS | |
2262 | INHIBIT_UL_CHECK); |
2263 | ioarcb->request_type = REQ_TYPE_SCSI; |
2264 | ioarcb->cdb[0] = REQUEST_SENSE; |
2265 | ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE; |
2266 | |
2267 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
2268 | offsetof(struct pmcraid_ioarcb, |
2269 | add_data.u.ioadl[0])); |
2270 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
2271 | |
2272 | ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); |
2273 | |
2274 | ioadl->address = cpu_to_le64(cmd->sense_buffer_dma); |
2275 | ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); |
2276 | ioadl->flags = IOADL_FLAGS_LAST_DESC; |
2277 | |
2278 | /* request sense might be called as part of error response processing |
2279 | * which runs in tasklets context. It is possible that mid-layer might |
2280 | * schedule queuecommand during this time, hence, writting to IOARRIN |
2281 | * must be protect by host_lock |
2282 | */ |
2283 | pmcraid_send_cmd(cmd, pmcraid_erp_done, |
2284 | PMCRAID_REQUEST_SENSE_TIMEOUT, |
2285 | pmcraid_timeout_handler); |
2286 | } |
2287 | |
2288 | /** |
2289 | * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery |
2290 | * @cmd: command that failed |
2291 | * @sense: true if request_sense is required after cancel all |
2292 | * |
2293 | * This function sends a cancel all to a device to clear the queue. |
2294 | */ |
2295 | static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense) |
2296 | { |
2297 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
2298 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
2299 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; |
2300 | void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done |
2301 | : pmcraid_request_sense; |
2302 | |
2303 | memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
2304 | ioarcb->request_flags0 = SYNC_OVERRIDE; |
2305 | ioarcb->request_type = REQ_TYPE_IOACMD; |
2306 | ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS; |
2307 | |
2308 | if (RES_IS_GSCSI(res->cfg_entry)) |
2309 | ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL; |
2310 | |
2311 | ioarcb->ioadl_bus_addr = 0; |
2312 | ioarcb->ioadl_length = 0; |
2313 | ioarcb->data_transfer_length = 0; |
2314 | ioarcb->ioarcb_bus_addr &= (~0x1FULL); |
2315 | |
2316 | /* writing to IOARRIN must be protected by host_lock, as mid-layer |
2317 | * schedule queuecommand while we are doing this |
2318 | */ |
2319 | pmcraid_send_cmd(cmd, cmd_done, |
2320 | PMCRAID_REQUEST_SENSE_TIMEOUT, |
2321 | pmcraid_timeout_handler); |
2322 | } |
2323 | |
2324 | /** |
2325 | * pmcraid_frame_auto_sense: frame fixed format sense information |
2326 | * |
2327 | * @cmd: pointer to failing command block |
2328 | * |
2329 | * Return value |
2330 | * none |
2331 | */ |
2332 | static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd) |
2333 | { |
2334 | u8 *sense_buf = cmd->scsi_cmd->sense_buffer; |
2335 | struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata; |
2336 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; |
2337 | u32 ioasc = le32_to_cpu(ioasa->ioasc); |
2338 | u32 failing_lba = 0; |
2339 | |
2340 | memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
2341 | cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION; |
2342 | |
2343 | if (RES_IS_VSET(res->cfg_entry) && |
2344 | ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC && |
2345 | ioasa->u.vset.failing_lba_hi != 0) { |
2346 | |
2347 | sense_buf[0] = 0x72; |
2348 | sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc); |
2349 | sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc); |
2350 | sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc); |
2351 | |
2352 | sense_buf[7] = 12; |
2353 | sense_buf[8] = 0; |
2354 | sense_buf[9] = 0x0A; |
2355 | sense_buf[10] = 0x80; |
2356 | |
2357 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi); |
2358 | |
2359 | sense_buf[12] = (failing_lba & 0xff000000) >> 24; |
2360 | sense_buf[13] = (failing_lba & 0x00ff0000) >> 16; |
2361 | sense_buf[14] = (failing_lba & 0x0000ff00) >> 8; |
2362 | sense_buf[15] = failing_lba & 0x000000ff; |
2363 | |
2364 | failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo); |
2365 | |
2366 | sense_buf[16] = (failing_lba & 0xff000000) >> 24; |
2367 | sense_buf[17] = (failing_lba & 0x00ff0000) >> 16; |
2368 | sense_buf[18] = (failing_lba & 0x0000ff00) >> 8; |
2369 | sense_buf[19] = failing_lba & 0x000000ff; |
2370 | } else { |
2371 | sense_buf[0] = 0x70; |
2372 | sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc); |
2373 | sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc); |
2374 | sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc); |
2375 | |
2376 | if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) { |
2377 | if (RES_IS_VSET(res->cfg_entry)) |
2378 | failing_lba = |
2379 | le32_to_cpu(ioasa->u. |
2380 | vset.failing_lba_lo); |
2381 | sense_buf[0] |= 0x80; |
2382 | sense_buf[3] = (failing_lba >> 24) & 0xff; |
2383 | sense_buf[4] = (failing_lba >> 16) & 0xff; |
2384 | sense_buf[5] = (failing_lba >> 8) & 0xff; |
2385 | sense_buf[6] = failing_lba & 0xff; |
2386 | } |
2387 | |
2388 | sense_buf[7] = 6; /* additional length */ |
2389 | } |
2390 | } |
2391 | |
2392 | /** |
2393 | * pmcraid_error_handler - Error response handlers for a SCSI op |
2394 | * @cmd: pointer to pmcraid_cmd that has failed |
2395 | * |
2396 | * This function determines whether or not to initiate ERP on the affected |
2397 | * device. This is called from a tasklet, which doesn't hold any locks. |
2398 | * |
2399 | * Return value: |
2400 | * 0 it caller can complete the request, otherwise 1 where in error |
2401 | * handler itself completes the request and returns the command block |
2402 | * back to free-pool |
2403 | */ |
2404 | static int pmcraid_error_handler(struct pmcraid_cmd *cmd) |
2405 | { |
2406 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
2407 | struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; |
2408 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
2409 | struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; |
2410 | u32 ioasc = le32_to_cpu(ioasa->ioasc); |
2411 | u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK; |
2412 | u32 sense_copied = 0; |
2413 | |
2414 | if (!res) { |
2415 | pmcraid_info("resource pointer is NULL\n"); |
2416 | return 0; |
2417 | } |
2418 | |
2419 | /* If this was a SCSI read/write command keep count of errors */ |
2420 | if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD) |
2421 | atomic_inc(&res->read_failures); |
2422 | else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD) |
2423 | atomic_inc(&res->write_failures); |
2424 | |
2425 | if (!RES_IS_GSCSI(res->cfg_entry) && |
2426 | masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) { |
2427 | pmcraid_frame_auto_sense(cmd); |
2428 | } |
2429 | |
2430 | /* Log IOASC/IOASA information based on user settings */ |
2431 | pmcraid_ioasc_logger(ioasc, cmd); |
2432 | |
2433 | switch (masked_ioasc) { |
2434 | |
2435 | case PMCRAID_IOASC_AC_TERMINATED_BY_HOST: |
2436 | scsi_cmd->result |= (DID_ABORT << 16); |
2437 | break; |
2438 | |
2439 | case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE: |
2440 | case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE: |
2441 | scsi_cmd->result |= (DID_NO_CONNECT << 16); |
2442 | break; |
2443 | |
2444 | case PMCRAID_IOASC_NR_SYNC_REQUIRED: |
2445 | res->sync_reqd = 1; |
2446 | scsi_cmd->result |= (DID_IMM_RETRY << 16); |
2447 | break; |
2448 | |
2449 | case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC: |
2450 | scsi_cmd->result |= (DID_PASSTHROUGH << 16); |
2451 | break; |
2452 | |
2453 | case PMCRAID_IOASC_UA_BUS_WAS_RESET: |
2454 | case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER: |
2455 | if (!res->reset_progress) |
2456 | scsi_report_bus_reset(pinstance->host, |
2457 | scsi_cmd->device->channel); |
2458 | scsi_cmd->result |= (DID_ERROR << 16); |
2459 | break; |
2460 | |
2461 | case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR: |
2462 | scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc); |
2463 | res->sync_reqd = 1; |
2464 | |
2465 | /* if check_condition is not active return with error otherwise |
2466 | * get/frame the sense buffer |
2467 | */ |
2468 | if (PMCRAID_IOASC_SENSE_STATUS(ioasc) != |
2469 | SAM_STAT_CHECK_CONDITION && |
2470 | PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE) |
2471 | return 0; |
2472 | |
2473 | /* If we have auto sense data as part of IOASA pass it to |
2474 | * mid-layer |
2475 | */ |
2476 | if (ioasa->auto_sense_length != 0) { |
2477 | short sense_len = ioasa->auto_sense_length; |
2478 | int data_size = min_t(u16, le16_to_cpu(sense_len), |
2479 | SCSI_SENSE_BUFFERSIZE); |
2480 | |
2481 | memcpy(scsi_cmd->sense_buffer, |
2482 | ioasa->sense_data, |
2483 | data_size); |
2484 | sense_copied = 1; |
2485 | } |
2486 | |
2487 | if (RES_IS_GSCSI(res->cfg_entry)) |
2488 | pmcraid_cancel_all(cmd, sense_copied); |
2489 | else if (sense_copied) |
2490 | pmcraid_erp_done(cmd); |
2491 | else |
2492 | pmcraid_request_sense(cmd); |
2493 | |
2494 | return 1; |
2495 | |
2496 | case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED: |
2497 | break; |
2498 | |
2499 | default: |
2500 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR) |
2501 | scsi_cmd->result |= (DID_ERROR << 16); |
2502 | break; |
2503 | } |
2504 | return 0; |
2505 | } |
2506 | |
2507 | /** |
2508 | * pmcraid_reset_device - device reset handler functions |
2509 | * |
2510 | * @scsi_cmd: scsi command struct |
2511 | * @modifier: reset modifier indicating the reset sequence to be performed |
2512 | * |
2513 | * This function issues a device reset to the affected device. |
2514 | * A LUN reset will be sent to the device first. If that does |
2515 | * not work, a target reset will be sent. |
2516 | * |
2517 | * Return value: |
2518 | * SUCCESS / FAILED |
2519 | */ |
2520 | static int pmcraid_reset_device( |
2521 | struct scsi_cmnd *scsi_cmd, |
2522 | unsigned long timeout, |
2523 | u8 modifier |
2524 | ) |
2525 | { |
2526 | struct pmcraid_cmd *cmd; |
2527 | struct pmcraid_instance *pinstance; |
2528 | struct pmcraid_resource_entry *res; |
2529 | struct pmcraid_ioarcb *ioarcb; |
2530 | unsigned long lock_flags; |
2531 | u32 ioasc; |
2532 | |
2533 | pinstance = |
2534 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
2535 | res = scsi_cmd->device->hostdata; |
2536 | |
2537 | if (!res) { |
2538 | sdev_printk(KERN_ERR, scsi_cmd->device, |
2539 | "reset_device: NULL resource pointer\n"); |
2540 | return FAILED; |
2541 | } |
2542 | |
2543 | /* If adapter is currently going through reset/reload, return failed. |
2544 | * This will force the mid-layer to call _eh_bus/host reset, which |
2545 | * will then go to sleep and wait for the reset to complete |
2546 | */ |
2547 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
2548 | if (pinstance->ioa_reset_in_progress || |
2549 | pinstance->ioa_state == IOA_STATE_DEAD) { |
2550 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2551 | return FAILED; |
2552 | } |
2553 | |
2554 | res->reset_progress = 1; |
2555 | pmcraid_info("Resetting %s resource with addr %x\n", |
2556 | ((modifier & RESET_DEVICE_LUN) ? "LUN" : |
2557 | ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")), |
2558 | le32_to_cpu(res->cfg_entry.resource_address)); |
2559 | |
2560 | /* get a free cmd block */ |
2561 | cmd = pmcraid_get_free_cmd(pinstance); |
2562 | |
2563 | if (cmd == NULL) { |
2564 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2565 | pmcraid_err("%s: no cmd blocks are available\n", __func__); |
2566 | return FAILED; |
2567 | } |
2568 | |
2569 | ioarcb = &cmd->ioa_cb->ioarcb; |
2570 | ioarcb->resource_handle = res->cfg_entry.resource_handle; |
2571 | ioarcb->request_type = REQ_TYPE_IOACMD; |
2572 | ioarcb->cdb[0] = PMCRAID_RESET_DEVICE; |
2573 | |
2574 | /* Initialize reset modifier bits */ |
2575 | if (modifier) |
2576 | modifier = ENABLE_RESET_MODIFIER | modifier; |
2577 | |
2578 | ioarcb->cdb[1] = modifier; |
2579 | |
2580 | init_completion(&cmd->wait_for_completion); |
2581 | cmd->completion_req = 1; |
2582 | |
2583 | pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n", |
2584 | cmd->ioa_cb->ioarcb.cdb[0], |
2585 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle), |
2586 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2); |
2587 | |
2588 | pmcraid_send_cmd(cmd, |
2589 | pmcraid_internal_done, |
2590 | timeout, |
2591 | pmcraid_timeout_handler); |
2592 | |
2593 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
2594 | |
2595 | /* RESET_DEVICE command completes after all pending IOARCBs are |
2596 | * completed. Once this command is completed, pmcraind_internal_done |
2597 | * will wake up the 'completion' queue. |
2598 | */ |
2599 | wait_for_completion(&cmd->wait_for_completion); |
2600 | |
2601 | /* complete the command here itself and return the command block |
2602 | * to free list |
2603 | */ |
2604 | pmcraid_return_cmd(cmd); |
2605 | res->reset_progress = 0; |
2606 | ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
2607 | |
2608 | /* set the return value based on the returned ioasc */ |
2609 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; |
2610 | } |
2611 | |
2612 | /** |
2613 | * _pmcraid_io_done - helper for pmcraid_io_done function |
2614 | * |
2615 | * @cmd: pointer to pmcraid command struct |
2616 | * @reslen: residual data length to be set in the ioasa |
2617 | * @ioasc: ioasc either returned by IOA or set by driver itself. |
2618 | * |
2619 | * This function is invoked by pmcraid_io_done to complete mid-layer |
2620 | * scsi ops. |
2621 | * |
2622 | * Return value: |
2623 | * 0 if caller is required to return it to free_pool. Returns 1 if |
2624 | * caller need not worry about freeing command block as error handler |
2625 | * will take care of that. |
2626 | */ |
2627 | |
2628 | static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc) |
2629 | { |
2630 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
2631 | int rc = 0; |
2632 | |
2633 | scsi_set_resid(scsi_cmd, reslen); |
2634 | |
2635 | pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n", |
2636 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2, |
2637 | cmd->ioa_cb->ioarcb.cdb[0], |
2638 | ioasc, scsi_cmd->result); |
2639 | |
2640 | if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0) |
2641 | rc = pmcraid_error_handler(cmd); |
2642 | |
2643 | if (rc == 0) { |
2644 | scsi_dma_unmap(scsi_cmd); |
2645 | scsi_cmd->scsi_done(scsi_cmd); |
2646 | } |
2647 | |
2648 | return rc; |
2649 | } |
2650 | |
2651 | /** |
2652 | * pmcraid_io_done - SCSI completion function |
2653 | * |
2654 | * @cmd: pointer to pmcraid command struct |
2655 | * |
2656 | * This function is invoked by tasklet/mid-layer error handler to completing |
2657 | * the SCSI ops sent from mid-layer. |
2658 | * |
2659 | * Return value |
2660 | * none |
2661 | */ |
2662 | |
2663 | static void pmcraid_io_done(struct pmcraid_cmd *cmd) |
2664 | { |
2665 | u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
2666 | u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length); |
2667 | |
2668 | if (_pmcraid_io_done(cmd, reslen, ioasc) == 0) |
2669 | pmcraid_return_cmd(cmd); |
2670 | } |
2671 | |
2672 | /** |
2673 | * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA |
2674 | * |
2675 | * @cmd: command block of the command to be aborted |
2676 | * |
2677 | * Return Value: |
2678 | * returns pointer to command structure used as cancelling cmd |
2679 | */ |
2680 | static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd) |
2681 | { |
2682 | struct pmcraid_cmd *cancel_cmd; |
2683 | struct pmcraid_instance *pinstance; |
2684 | struct pmcraid_resource_entry *res; |
2685 | |
2686 | pinstance = (struct pmcraid_instance *)cmd->drv_inst; |
2687 | res = cmd->scsi_cmd->device->hostdata; |
2688 | |
2689 | cancel_cmd = pmcraid_get_free_cmd(pinstance); |
2690 | |
2691 | if (cancel_cmd == NULL) { |
2692 | pmcraid_err("%s: no cmd blocks are available\n", __func__); |
2693 | return NULL; |
2694 | } |
2695 | |
2696 | pmcraid_prepare_cancel_cmd(cancel_cmd, cmd); |
2697 | |
2698 | pmcraid_info("aborting command CDB[0]= %x with index = %d\n", |
2699 | cmd->ioa_cb->ioarcb.cdb[0], |
2700 | cmd->ioa_cb->ioarcb.response_handle >> 2); |
2701 | |
2702 | init_completion(&cancel_cmd->wait_for_completion); |
2703 | cancel_cmd->completion_req = 1; |
2704 | |
2705 | pmcraid_info("command (%d) CDB[0] = %x for %x\n", |
2706 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2, |
2707 | cmd->ioa_cb->ioarcb.cdb[0], |
2708 | le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle)); |
2709 | |
2710 | pmcraid_send_cmd(cancel_cmd, |
2711 | pmcraid_internal_done, |
2712 | PMCRAID_INTERNAL_TIMEOUT, |
2713 | pmcraid_timeout_handler); |
2714 | return cancel_cmd; |
2715 | } |
2716 | |
2717 | /** |
2718 | * pmcraid_abort_complete - Waits for ABORT TASK completion |
2719 | * |
2720 | * @cancel_cmd: command block use as cancelling command |
2721 | * |
2722 | * Return Value: |
2723 | * returns SUCCESS if ABORT TASK has good completion |
2724 | * otherwise FAILED |
2725 | */ |
2726 | static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd) |
2727 | { |
2728 | struct pmcraid_resource_entry *res; |
2729 | u32 ioasc; |
2730 | |
2731 | wait_for_completion(&cancel_cmd->wait_for_completion); |
2732 | res = cancel_cmd->u.res; |
2733 | cancel_cmd->u.res = NULL; |
2734 | ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc); |
2735 | |
2736 | /* If the abort task is not timed out we will get a Good completion |
2737 | * as sense_key, otherwise we may get one the following responses |
2738 | * due to subsquent bus reset or device reset. In case IOASC is |
2739 | * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource |
2740 | */ |
2741 | if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || |
2742 | ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) { |
2743 | if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) |
2744 | res->sync_reqd = 1; |
2745 | ioasc = 0; |
2746 | } |
2747 | |
2748 | /* complete the command here itself */ |
2749 | pmcraid_return_cmd(cancel_cmd); |
2750 | return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; |
2751 | } |
2752 | |
2753 | /** |
2754 | * pmcraid_eh_abort_handler - entry point for aborting a single task on errors |
2755 | * |
2756 | * @scsi_cmd: scsi command struct given by mid-layer. When this is called |
2757 | * mid-layer ensures that no other commands are queued. This |
2758 | * never gets called under interrupt, but a separate eh thread. |
2759 | * |
2760 | * Return value: |
2761 | * SUCCESS / FAILED |
2762 | */ |
2763 | static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd) |
2764 | { |
2765 | struct pmcraid_instance *pinstance; |
2766 | struct pmcraid_cmd *cmd; |
2767 | struct pmcraid_resource_entry *res; |
2768 | unsigned long host_lock_flags; |
2769 | unsigned long pending_lock_flags; |
2770 | struct pmcraid_cmd *cancel_cmd = NULL; |
2771 | int cmd_found = 0; |
2772 | int rc = FAILED; |
2773 | |
2774 | pinstance = |
2775 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
2776 | |
2777 | scmd_printk(KERN_INFO, scsi_cmd, |
2778 | "I/O command timed out, aborting it.\n"); |
2779 | |
2780 | res = scsi_cmd->device->hostdata; |
2781 | |
2782 | if (res == NULL) |
2783 | return rc; |
2784 | |
2785 | /* If we are currently going through reset/reload, return failed. |
2786 | * This will force the mid-layer to eventually call |
2787 | * pmcraid_eh_host_reset which will then go to sleep and wait for the |
2788 | * reset to complete |
2789 | */ |
2790 | spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags); |
2791 | |
2792 | if (pinstance->ioa_reset_in_progress || |
2793 | pinstance->ioa_state == IOA_STATE_DEAD) { |
2794 | spin_unlock_irqrestore(pinstance->host->host_lock, |
2795 | host_lock_flags); |
2796 | return rc; |
2797 | } |
2798 | |
2799 | /* loop over pending cmd list to find cmd corresponding to this |
2800 | * scsi_cmd. Note that this command might not have been completed |
2801 | * already. locking: all pending commands are protected with |
2802 | * pending_pool_lock. |
2803 | */ |
2804 | spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags); |
2805 | list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) { |
2806 | |
2807 | if (cmd->scsi_cmd == scsi_cmd) { |
2808 | cmd_found = 1; |
2809 | break; |
2810 | } |
2811 | } |
2812 | |
2813 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
2814 | pending_lock_flags); |
2815 | |
2816 | /* If the command to be aborted was given to IOA and still pending with |
2817 | * it, send ABORT_TASK to abort this and wait for its completion |
2818 | */ |
2819 | if (cmd_found) |
2820 | cancel_cmd = pmcraid_abort_cmd(cmd); |
2821 | |
2822 | spin_unlock_irqrestore(pinstance->host->host_lock, |
2823 | host_lock_flags); |
2824 | |
2825 | if (cancel_cmd) { |
2826 | cancel_cmd->u.res = cmd->scsi_cmd->device->hostdata; |
2827 | rc = pmcraid_abort_complete(cancel_cmd); |
2828 | } |
2829 | |
2830 | return cmd_found ? rc : SUCCESS; |
2831 | } |
2832 | |
2833 | /** |
2834 | * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks |
2835 | * |
2836 | * @scmd: pointer to scsi_cmd that was sent to the resource to be reset. |
2837 | * |
2838 | * All these routines invokve pmcraid_reset_device with appropriate parameters. |
2839 | * Since these are called from mid-layer EH thread, no other IO will be queued |
2840 | * to the resource being reset. However, control path (IOCTL) may be active so |
2841 | * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device |
2842 | * takes care by locking/unlocking host_lock. |
2843 | * |
2844 | * Return value |
2845 | * SUCCESS or FAILED |
2846 | */ |
2847 | static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd) |
2848 | { |
2849 | scmd_printk(KERN_INFO, scmd, |
2850 | "resetting device due to an I/O command timeout.\n"); |
2851 | return pmcraid_reset_device(scmd, |
2852 | PMCRAID_INTERNAL_TIMEOUT, |
2853 | RESET_DEVICE_LUN); |
2854 | } |
2855 | |
2856 | static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd) |
2857 | { |
2858 | scmd_printk(KERN_INFO, scmd, |
2859 | "Doing bus reset due to an I/O command timeout.\n"); |
2860 | return pmcraid_reset_device(scmd, |
2861 | PMCRAID_RESET_BUS_TIMEOUT, |
2862 | RESET_DEVICE_BUS); |
2863 | } |
2864 | |
2865 | static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd) |
2866 | { |
2867 | scmd_printk(KERN_INFO, scmd, |
2868 | "Doing target reset due to an I/O command timeout.\n"); |
2869 | return pmcraid_reset_device(scmd, |
2870 | PMCRAID_INTERNAL_TIMEOUT, |
2871 | RESET_DEVICE_TARGET); |
2872 | } |
2873 | |
2874 | /** |
2875 | * pmcraid_eh_host_reset_handler - adapter reset handler callback |
2876 | * |
2877 | * @scmd: pointer to scsi_cmd that was sent to a resource of adapter |
2878 | * |
2879 | * Initiates adapter reset to bring it up to operational state |
2880 | * |
2881 | * Return value |
2882 | * SUCCESS or FAILED |
2883 | */ |
2884 | static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd) |
2885 | { |
2886 | unsigned long interval = 10000; /* 10 seconds interval */ |
2887 | int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval; |
2888 | struct pmcraid_instance *pinstance = |
2889 | (struct pmcraid_instance *)(scmd->device->host->hostdata); |
2890 | |
2891 | |
2892 | /* wait for an additional 150 seconds just in case firmware could come |
2893 | * up and if it could complete all the pending commands excluding the |
2894 | * two HCAM (CCN and LDN). |
2895 | */ |
2896 | while (waits--) { |
2897 | if (atomic_read(&pinstance->outstanding_cmds) <= |
2898 | PMCRAID_MAX_HCAM_CMD) |
2899 | return SUCCESS; |
2900 | msleep(interval); |
2901 | } |
2902 | |
2903 | dev_err(&pinstance->pdev->dev, |
2904 | "Adapter being reset due to an I/O command timeout.\n"); |
2905 | return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED; |
2906 | } |
2907 | |
2908 | /** |
2909 | * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes |
2910 | * @scsi_cmd: scsi command struct |
2911 | * |
2912 | * Return value |
2913 | * number of tags or 0 if the task is not tagged |
2914 | */ |
2915 | static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd) |
2916 | { |
2917 | char tag[2]; |
2918 | u8 rc = 0; |
2919 | |
2920 | if (scsi_populate_tag_msg(scsi_cmd, tag)) { |
2921 | switch (tag[0]) { |
2922 | case MSG_SIMPLE_TAG: |
2923 | rc = TASK_TAG_SIMPLE; |
2924 | break; |
2925 | case MSG_HEAD_TAG: |
2926 | rc = TASK_TAG_QUEUE_HEAD; |
2927 | break; |
2928 | case MSG_ORDERED_TAG: |
2929 | rc = TASK_TAG_ORDERED; |
2930 | break; |
2931 | }; |
2932 | } |
2933 | |
2934 | return rc; |
2935 | } |
2936 | |
2937 | |
2938 | /** |
2939 | * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB |
2940 | * @cmd: pmcraid command struct |
2941 | * @sgcount: count of scatter-gather elements |
2942 | * |
2943 | * Return value |
2944 | * returns pointer pmcraid_ioadl_desc, initialized to point to internal |
2945 | * or external IOADLs |
2946 | */ |
2947 | struct pmcraid_ioadl_desc * |
2948 | pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount) |
2949 | { |
2950 | struct pmcraid_ioadl_desc *ioadl; |
2951 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
2952 | int ioadl_count = 0; |
2953 | |
2954 | if (ioarcb->add_cmd_param_length) |
2955 | ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16); |
2956 | ioarcb->ioadl_length = |
2957 | sizeof(struct pmcraid_ioadl_desc) * sgcount; |
2958 | |
2959 | if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) { |
2960 | /* external ioadls start at offset 0x80 from control_block |
2961 | * structure, re-using 24 out of 27 ioadls part of IOARCB. |
2962 | * It is necessary to indicate to firmware that driver is |
2963 | * using ioadls to be treated as external to IOARCB. |
2964 | */ |
2965 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
2966 | ioarcb->ioadl_bus_addr = |
2967 | cpu_to_le64((cmd->ioa_cb_bus_addr) + |
2968 | offsetof(struct pmcraid_ioarcb, |
2969 | add_data.u.ioadl[3])); |
2970 | ioadl = &ioarcb->add_data.u.ioadl[3]; |
2971 | } else { |
2972 | ioarcb->ioadl_bus_addr = |
2973 | cpu_to_le64((cmd->ioa_cb_bus_addr) + |
2974 | offsetof(struct pmcraid_ioarcb, |
2975 | add_data.u.ioadl[ioadl_count])); |
2976 | |
2977 | ioadl = &ioarcb->add_data.u.ioadl[ioadl_count]; |
2978 | ioarcb->ioarcb_bus_addr |= |
2979 | DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8); |
2980 | } |
2981 | |
2982 | return ioadl; |
2983 | } |
2984 | |
2985 | /** |
2986 | * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer |
2987 | * @pinstance: pointer to adapter instance structure |
2988 | * @cmd: pmcraid command struct |
2989 | * |
2990 | * This function is invoked by queuecommand entry point while sending a command |
2991 | * to firmware. This builds ioadl descriptors and sets up ioarcb fields. |
2992 | * |
2993 | * Return value: |
2994 | * 0 on success or -1 on failure |
2995 | */ |
2996 | static int pmcraid_build_ioadl( |
2997 | struct pmcraid_instance *pinstance, |
2998 | struct pmcraid_cmd *cmd |
2999 | ) |
3000 | { |
3001 | int i, nseg; |
3002 | struct scatterlist *sglist; |
3003 | |
3004 | struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
3005 | struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); |
3006 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
3007 | |
3008 | u32 length = scsi_bufflen(scsi_cmd); |
3009 | |
3010 | if (!length) |
3011 | return 0; |
3012 | |
3013 | nseg = scsi_dma_map(scsi_cmd); |
3014 | |
3015 | if (nseg < 0) { |
3016 | scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n"); |
3017 | return -1; |
3018 | } else if (nseg > PMCRAID_MAX_IOADLS) { |
3019 | scsi_dma_unmap(scsi_cmd); |
3020 | scmd_printk(KERN_ERR, scsi_cmd, |
3021 | "sg count is (%d) more than allowed!\n", nseg); |
3022 | return -1; |
3023 | } |
3024 | |
3025 | /* Initialize IOARCB data transfer length fields */ |
3026 | if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) |
3027 | ioarcb->request_flags0 |= TRANSFER_DIR_WRITE; |
3028 | |
3029 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
3030 | ioarcb->data_transfer_length = cpu_to_le32(length); |
3031 | ioadl = pmcraid_init_ioadls(cmd, nseg); |
3032 | |
3033 | /* Initialize IOADL descriptor addresses */ |
3034 | scsi_for_each_sg(scsi_cmd, sglist, nseg, i) { |
3035 | ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist)); |
3036 | ioadl[i].address = cpu_to_le64(sg_dma_address(sglist)); |
3037 | ioadl[i].flags = 0; |
3038 | } |
3039 | /* setup last descriptor */ |
3040 | ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC; |
3041 | |
3042 | return 0; |
3043 | } |
3044 | |
3045 | /** |
3046 | * pmcraid_free_sglist - Frees an allocated SG buffer list |
3047 | * @sglist: scatter/gather list pointer |
3048 | * |
3049 | * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist |
3050 | * |
3051 | * Return value: |
3052 | * none |
3053 | */ |
3054 | static void pmcraid_free_sglist(struct pmcraid_sglist *sglist) |
3055 | { |
3056 | int i; |
3057 | |
3058 | for (i = 0; i < sglist->num_sg; i++) |
3059 | __free_pages(sg_page(&(sglist->scatterlist[i])), |
3060 | sglist->order); |
3061 | |
3062 | kfree(sglist); |
3063 | } |
3064 | |
3065 | /** |
3066 | * pmcraid_alloc_sglist - Allocates memory for a SG list |
3067 | * @buflen: buffer length |
3068 | * |
3069 | * Allocates a DMA'able buffer in chunks and assembles a scatter/gather |
3070 | * list. |
3071 | * |
3072 | * Return value |
3073 | * pointer to sglist / NULL on failure |
3074 | */ |
3075 | static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen) |
3076 | { |
3077 | struct pmcraid_sglist *sglist; |
3078 | struct scatterlist *scatterlist; |
3079 | struct page *page; |
3080 | int num_elem, i, j; |
3081 | int sg_size; |
3082 | int order; |
3083 | int bsize_elem; |
3084 | |
3085 | sg_size = buflen / (PMCRAID_MAX_IOADLS - 1); |
3086 | order = (sg_size > 0) ? get_order(sg_size) : 0; |
3087 | bsize_elem = PAGE_SIZE * (1 << order); |
3088 | |
3089 | /* Determine the actual number of sg entries needed */ |
3090 | if (buflen % bsize_elem) |
3091 | num_elem = (buflen / bsize_elem) + 1; |
3092 | else |
3093 | num_elem = buflen / bsize_elem; |
3094 | |
3095 | /* Allocate a scatter/gather list for the DMA */ |
3096 | sglist = kzalloc(sizeof(struct pmcraid_sglist) + |
3097 | (sizeof(struct scatterlist) * (num_elem - 1)), |
3098 | GFP_KERNEL); |
3099 | |
3100 | if (sglist == NULL) |
3101 | return NULL; |
3102 | |
3103 | scatterlist = sglist->scatterlist; |
3104 | sg_init_table(scatterlist, num_elem); |
3105 | sglist->order = order; |
3106 | sglist->num_sg = num_elem; |
3107 | sg_size = buflen; |
3108 | |
3109 | for (i = 0; i < num_elem; i++) { |
3110 | page = alloc_pages(GFP_KERNEL|GFP_DMA, order); |
3111 | if (!page) { |
3112 | for (j = i - 1; j >= 0; j--) |
3113 | __free_pages(sg_page(&scatterlist[j]), order); |
3114 | kfree(sglist); |
3115 | return NULL; |
3116 | } |
3117 | |
3118 | sg_set_page(&scatterlist[i], page, |
3119 | sg_size < bsize_elem ? sg_size : bsize_elem, 0); |
3120 | sg_size -= bsize_elem; |
3121 | } |
3122 | |
3123 | return sglist; |
3124 | } |
3125 | |
3126 | /** |
3127 | * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list |
3128 | * @sglist: scatter/gather list pointer |
3129 | * @buffer: buffer pointer |
3130 | * @len: buffer length |
3131 | * @direction: data transfer direction |
3132 | * |
3133 | * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist |
3134 | * |
3135 | * Return value: |
3136 | * 0 on success / other on failure |
3137 | */ |
3138 | static int pmcraid_copy_sglist( |
3139 | struct pmcraid_sglist *sglist, |
3140 | unsigned long buffer, |
3141 | u32 len, |
3142 | int direction |
3143 | ) |
3144 | { |
3145 | struct scatterlist *scatterlist; |
3146 | void *kaddr; |
3147 | int bsize_elem; |
3148 | int i; |
3149 | int rc = 0; |
3150 | |
3151 | /* Determine the actual number of bytes per element */ |
3152 | bsize_elem = PAGE_SIZE * (1 << sglist->order); |
3153 | |
3154 | scatterlist = sglist->scatterlist; |
3155 | |
3156 | for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) { |
3157 | struct page *page = sg_page(&scatterlist[i]); |
3158 | |
3159 | kaddr = kmap(page); |
3160 | if (direction == DMA_TO_DEVICE) |
3161 | rc = __copy_from_user(kaddr, |
3162 | (void *)buffer, |
3163 | bsize_elem); |
3164 | else |
3165 | rc = __copy_to_user((void *)buffer, kaddr, bsize_elem); |
3166 | |
3167 | kunmap(page); |
3168 | |
3169 | if (rc) { |
3170 | pmcraid_err("failed to copy user data into sg list\n"); |
3171 | return -EFAULT; |
3172 | } |
3173 | |
3174 | scatterlist[i].length = bsize_elem; |
3175 | } |
3176 | |
3177 | if (len % bsize_elem) { |
3178 | struct page *page = sg_page(&scatterlist[i]); |
3179 | |
3180 | kaddr = kmap(page); |
3181 | |
3182 | if (direction == DMA_TO_DEVICE) |
3183 | rc = __copy_from_user(kaddr, |
3184 | (void *)buffer, |
3185 | len % bsize_elem); |
3186 | else |
3187 | rc = __copy_to_user((void *)buffer, |
3188 | kaddr, |
3189 | len % bsize_elem); |
3190 | |
3191 | kunmap(page); |
3192 | |
3193 | scatterlist[i].length = len % bsize_elem; |
3194 | } |
3195 | |
3196 | if (rc) { |
3197 | pmcraid_err("failed to copy user data into sg list\n"); |
3198 | rc = -EFAULT; |
3199 | } |
3200 | |
3201 | return rc; |
3202 | } |
3203 | |
3204 | /** |
3205 | * pmcraid_queuecommand - Queue a mid-layer request |
3206 | * @scsi_cmd: scsi command struct |
3207 | * @done: done function |
3208 | * |
3209 | * This function queues a request generated by the mid-layer. Midlayer calls |
3210 | * this routine within host->lock. Some of the functions called by queuecommand |
3211 | * would use cmd block queue locks (free_pool_lock and pending_pool_lock) |
3212 | * |
3213 | * Return value: |
3214 | * 0 on success |
3215 | * SCSI_MLQUEUE_DEVICE_BUSY if device is busy |
3216 | * SCSI_MLQUEUE_HOST_BUSY if host is busy |
3217 | */ |
3218 | static int pmcraid_queuecommand( |
3219 | struct scsi_cmnd *scsi_cmd, |
3220 | void (*done) (struct scsi_cmnd *) |
3221 | ) |
3222 | { |
3223 | struct pmcraid_instance *pinstance; |
3224 | struct pmcraid_resource_entry *res; |
3225 | struct pmcraid_ioarcb *ioarcb; |
3226 | struct pmcraid_cmd *cmd; |
3227 | int rc = 0; |
3228 | |
3229 | pinstance = |
3230 | (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
3231 | |
3232 | scsi_cmd->scsi_done = done; |
3233 | res = scsi_cmd->device->hostdata; |
3234 | scsi_cmd->result = (DID_OK << 16); |
3235 | |
3236 | /* if adapter is marked as dead, set result to DID_NO_CONNECT complete |
3237 | * the command |
3238 | */ |
3239 | if (pinstance->ioa_state == IOA_STATE_DEAD) { |
3240 | pmcraid_info("IOA is dead, but queuecommand is scheduled\n"); |
3241 | scsi_cmd->result = (DID_NO_CONNECT << 16); |
3242 | scsi_cmd->scsi_done(scsi_cmd); |
3243 | return 0; |
3244 | } |
3245 | |
3246 | /* If IOA reset is in progress, can't queue the commands */ |
3247 | if (pinstance->ioa_reset_in_progress) |
3248 | return SCSI_MLQUEUE_HOST_BUSY; |
3249 | |
3250 | /* initialize the command and IOARCB to be sent to IOA */ |
3251 | cmd = pmcraid_get_free_cmd(pinstance); |
3252 | |
3253 | if (cmd == NULL) { |
3254 | pmcraid_err("free command block is not available\n"); |
3255 | return SCSI_MLQUEUE_HOST_BUSY; |
3256 | } |
3257 | |
3258 | cmd->scsi_cmd = scsi_cmd; |
3259 | ioarcb = &(cmd->ioa_cb->ioarcb); |
3260 | memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len); |
3261 | ioarcb->resource_handle = res->cfg_entry.resource_handle; |
3262 | ioarcb->request_type = REQ_TYPE_SCSI; |
3263 | |
3264 | cmd->cmd_done = pmcraid_io_done; |
3265 | |
3266 | if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) { |
3267 | if (scsi_cmd->underflow == 0) |
3268 | ioarcb->request_flags0 |= INHIBIT_UL_CHECK; |
3269 | |
3270 | if (res->sync_reqd) { |
3271 | ioarcb->request_flags0 |= SYNC_COMPLETE; |
3272 | res->sync_reqd = 0; |
3273 | } |
3274 | |
3275 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
3276 | ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd); |
3277 | |
3278 | if (RES_IS_GSCSI(res->cfg_entry)) |
3279 | ioarcb->request_flags1 |= DELAY_AFTER_RESET; |
3280 | } |
3281 | |
3282 | rc = pmcraid_build_ioadl(pinstance, cmd); |
3283 | |
3284 | pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n", |
3285 | le32_to_cpu(ioarcb->response_handle) >> 2, |
3286 | scsi_cmd->cmnd[0], pinstance->host->unique_id, |
3287 | RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID : |
3288 | PMCRAID_PHYS_BUS_ID, |
3289 | RES_IS_VSET(res->cfg_entry) ? |
3290 | res->cfg_entry.unique_flags1 : |
3291 | RES_TARGET(res->cfg_entry.resource_address), |
3292 | RES_LUN(res->cfg_entry.resource_address)); |
3293 | |
3294 | if (likely(rc == 0)) { |
3295 | _pmcraid_fire_command(cmd); |
3296 | } else { |
3297 | pmcraid_err("queuecommand could not build ioadl\n"); |
3298 | pmcraid_return_cmd(cmd); |
3299 | rc = SCSI_MLQUEUE_HOST_BUSY; |
3300 | } |
3301 | |
3302 | return rc; |
3303 | } |
3304 | |
3305 | /** |
3306 | * pmcraid_open -char node "open" entry, allowed only users with admin access |
3307 | */ |
3308 | static int pmcraid_chr_open(struct inode *inode, struct file *filep) |
3309 | { |
3310 | struct pmcraid_instance *pinstance; |
3311 | |
3312 | if (!capable(CAP_SYS_ADMIN)) |
3313 | return -EACCES; |
3314 | |
3315 | /* Populate adapter instance * pointer for use by ioctl */ |
3316 | pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev); |
3317 | filep->private_data = pinstance; |
3318 | |
3319 | return 0; |
3320 | } |
3321 | |
3322 | /** |
3323 | * pmcraid_release - char node "release" entry point |
3324 | */ |
3325 | static int pmcraid_chr_release(struct inode *inode, struct file *filep) |
3326 | { |
3327 | struct pmcraid_instance *pinstance = |
3328 | ((struct pmcraid_instance *)filep->private_data); |
3329 | |
3330 | filep->private_data = NULL; |
3331 | fasync_helper(-1, filep, 0, &pinstance->aen_queue); |
3332 | |
3333 | return 0; |
3334 | } |
3335 | |
3336 | /** |
3337 | * pmcraid_fasync - Async notifier registration from applications |
3338 | * |
3339 | * This function adds the calling process to a driver global queue. When an |
3340 | * event occurs, SIGIO will be sent to all processes in this queue. |
3341 | */ |
3342 | static int pmcraid_chr_fasync(int fd, struct file *filep, int mode) |
3343 | { |
3344 | struct pmcraid_instance *pinstance; |
3345 | int rc; |
3346 | |
3347 | pinstance = (struct pmcraid_instance *)filep->private_data; |
3348 | mutex_lock(&pinstance->aen_queue_lock); |
3349 | rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue); |
3350 | mutex_unlock(&pinstance->aen_queue_lock); |
3351 | |
3352 | return rc; |
3353 | } |
3354 | |
3355 | |
3356 | /** |
3357 | * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough |
3358 | * commands sent over IOCTL interface |
3359 | * |
3360 | * @cmd : pointer to struct pmcraid_cmd |
3361 | * @buflen : length of the request buffer |
3362 | * @direction : data transfer direction |
3363 | * |
3364 | * Return value |
3365 | * 0 on success, non-zero error code on failure |
3366 | */ |
3367 | static int pmcraid_build_passthrough_ioadls( |
3368 | struct pmcraid_cmd *cmd, |
3369 | int buflen, |
3370 | int direction |
3371 | ) |
3372 | { |
3373 | struct pmcraid_sglist *sglist = NULL; |
3374 | struct scatterlist *sg = NULL; |
3375 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
3376 | struct pmcraid_ioadl_desc *ioadl; |
3377 | int i; |
3378 | |
3379 | sglist = pmcraid_alloc_sglist(buflen); |
3380 | |
3381 | if (!sglist) { |
3382 | pmcraid_err("can't allocate memory for passthrough SGls\n"); |
3383 | return -ENOMEM; |
3384 | } |
3385 | |
3386 | sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev, |
3387 | sglist->scatterlist, |
3388 | sglist->num_sg, direction); |
3389 | |
3390 | if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) { |
3391 | dev_err(&cmd->drv_inst->pdev->dev, |
3392 | "Failed to map passthrough buffer!\n"); |
3393 | pmcraid_free_sglist(sglist); |
3394 | return -EIO; |
3395 | } |
3396 | |
3397 | cmd->sglist = sglist; |
3398 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
3399 | |
3400 | ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg); |
3401 | |
3402 | /* Initialize IOADL descriptor addresses */ |
3403 | for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) { |
3404 | ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg)); |
3405 | ioadl[i].address = cpu_to_le64(sg_dma_address(sg)); |
3406 | ioadl[i].flags = 0; |
3407 | } |
3408 | |
3409 | /* setup the last descriptor */ |
3410 | ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC; |
3411 | |
3412 | return 0; |
3413 | } |
3414 | |
3415 | |
3416 | /** |
3417 | * pmcraid_release_passthrough_ioadls - release passthrough ioadls |
3418 | * |
3419 | * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated |
3420 | * @buflen: size of the request buffer |
3421 | * @direction: data transfer direction |
3422 | * |
3423 | * Return value |
3424 | * 0 on success, non-zero error code on failure |
3425 | */ |
3426 | static void pmcraid_release_passthrough_ioadls( |
3427 | struct pmcraid_cmd *cmd, |
3428 | int buflen, |
3429 | int direction |
3430 | ) |
3431 | { |
3432 | struct pmcraid_sglist *sglist = cmd->sglist; |
3433 | |
3434 | if (buflen > 0) { |
3435 | pci_unmap_sg(cmd->drv_inst->pdev, |
3436 | sglist->scatterlist, |
3437 | sglist->num_sg, |
3438 | direction); |
3439 | pmcraid_free_sglist(sglist); |
3440 | cmd->sglist = NULL; |
3441 | } |
3442 | } |
3443 | |
3444 | /** |
3445 | * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands |
3446 | * |
3447 | * @pinstance: pointer to adapter instance structure |
3448 | * @cmd: ioctl code |
3449 | * @arg: pointer to pmcraid_passthrough_buffer user buffer |
3450 | * |
3451 | * Return value |
3452 | * 0 on success, non-zero error code on failure |
3453 | */ |
3454 | static long pmcraid_ioctl_passthrough( |
3455 | struct pmcraid_instance *pinstance, |
3456 | unsigned int ioctl_cmd, |
3457 | unsigned int buflen, |
3458 | unsigned long arg |
3459 | ) |
3460 | { |
3461 | struct pmcraid_passthrough_ioctl_buffer *buffer; |
3462 | struct pmcraid_ioarcb *ioarcb; |
3463 | struct pmcraid_cmd *cmd; |
3464 | struct pmcraid_cmd *cancel_cmd; |
3465 | unsigned long request_buffer; |
3466 | unsigned long request_offset; |
3467 | unsigned long lock_flags; |
3468 | int request_size; |
3469 | int buffer_size; |
3470 | u8 access, direction; |
3471 | int rc = 0; |
3472 | |
3473 | /* If IOA reset is in progress, wait 10 secs for reset to complete */ |
3474 | if (pinstance->ioa_reset_in_progress) { |
3475 | rc = wait_event_interruptible_timeout( |
3476 | pinstance->reset_wait_q, |
3477 | !pinstance->ioa_reset_in_progress, |
3478 | msecs_to_jiffies(10000)); |
3479 | |
3480 | if (!rc) |
3481 | return -ETIMEDOUT; |
3482 | else if (rc < 0) |
3483 | return -ERESTARTSYS; |
3484 | } |
3485 | |
3486 | /* If adapter is not in operational state, return error */ |
3487 | if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) { |
3488 | pmcraid_err("IOA is not operational\n"); |
3489 | return -ENOTTY; |
3490 | } |
3491 | |
3492 | buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer); |
3493 | buffer = kmalloc(buffer_size, GFP_KERNEL); |
3494 | |
3495 | if (!buffer) { |
3496 | pmcraid_err("no memory for passthrough buffer\n"); |
3497 | return -ENOMEM; |
3498 | } |
3499 | |
3500 | request_offset = |
3501 | offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer); |
3502 | |
3503 | request_buffer = arg + request_offset; |
3504 | |
3505 | rc = __copy_from_user(buffer, |
3506 | (struct pmcraid_passthrough_ioctl_buffer *) arg, |
3507 | sizeof(struct pmcraid_passthrough_ioctl_buffer)); |
3508 | if (rc) { |
3509 | pmcraid_err("ioctl: can't copy passthrough buffer\n"); |
3510 | rc = -EFAULT; |
3511 | goto out_free_buffer; |
3512 | } |
3513 | |
3514 | request_size = buffer->ioarcb.data_transfer_length; |
3515 | |
3516 | if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) { |
3517 | access = VERIFY_READ; |
3518 | direction = DMA_TO_DEVICE; |
3519 | } else { |
3520 | access = VERIFY_WRITE; |
3521 | direction = DMA_FROM_DEVICE; |
3522 | } |
3523 | |
3524 | if (request_size > 0) { |
3525 | rc = access_ok(access, arg, request_offset + request_size); |
3526 | |
3527 | if (!rc) { |
3528 | rc = -EFAULT; |
3529 | goto out_free_buffer; |
3530 | } |
3531 | } |
3532 | |
3533 | /* check if we have any additional command parameters */ |
3534 | if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) { |
3535 | rc = -EINVAL; |
3536 | goto out_free_buffer; |
3537 | } |
3538 | |
3539 | cmd = pmcraid_get_free_cmd(pinstance); |
3540 | |
3541 | if (!cmd) { |
3542 | pmcraid_err("free command block is not available\n"); |
3543 | rc = -ENOMEM; |
3544 | goto out_free_buffer; |
3545 | } |
3546 | |
3547 | cmd->scsi_cmd = NULL; |
3548 | ioarcb = &(cmd->ioa_cb->ioarcb); |
3549 | |
3550 | /* Copy the user-provided IOARCB stuff field by field */ |
3551 | ioarcb->resource_handle = buffer->ioarcb.resource_handle; |
3552 | ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length; |
3553 | ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout; |
3554 | ioarcb->request_type = buffer->ioarcb.request_type; |
3555 | ioarcb->request_flags0 = buffer->ioarcb.request_flags0; |
3556 | ioarcb->request_flags1 = buffer->ioarcb.request_flags1; |
3557 | memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN); |
3558 | |
3559 | if (buffer->ioarcb.add_cmd_param_length) { |
3560 | ioarcb->add_cmd_param_length = |
3561 | buffer->ioarcb.add_cmd_param_length; |
3562 | ioarcb->add_cmd_param_offset = |
3563 | buffer->ioarcb.add_cmd_param_offset; |
3564 | memcpy(ioarcb->add_data.u.add_cmd_params, |
3565 | buffer->ioarcb.add_data.u.add_cmd_params, |
3566 | buffer->ioarcb.add_cmd_param_length); |
3567 | } |
3568 | |
3569 | if (request_size) { |
3570 | rc = pmcraid_build_passthrough_ioadls(cmd, |
3571 | request_size, |
3572 | direction); |
3573 | if (rc) { |
3574 | pmcraid_err("couldn't build passthrough ioadls\n"); |
3575 | goto out_free_buffer; |
3576 | } |
3577 | } |
3578 | |
3579 | /* If data is being written into the device, copy the data from user |
3580 | * buffers |
3581 | */ |
3582 | if (direction == DMA_TO_DEVICE && request_size > 0) { |
3583 | rc = pmcraid_copy_sglist(cmd->sglist, |
3584 | request_buffer, |
3585 | request_size, |
3586 | direction); |
3587 | if (rc) { |
3588 | pmcraid_err("failed to copy user buffer\n"); |
3589 | goto out_free_sglist; |
3590 | } |
3591 | } |
3592 | |
3593 | /* passthrough ioctl is a blocking command so, put the user to sleep |
3594 | * until timeout. Note that a timeout value of 0 means, do timeout. |
3595 | */ |
3596 | cmd->cmd_done = pmcraid_internal_done; |
3597 | init_completion(&cmd->wait_for_completion); |
3598 | cmd->completion_req = 1; |
3599 | |
3600 | pmcraid_info("command(%d) (CDB[0] = %x) for %x\n", |
3601 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2, |
3602 | cmd->ioa_cb->ioarcb.cdb[0], |
3603 | le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle)); |
3604 | |
3605 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
3606 | _pmcraid_fire_command(cmd); |
3607 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
3608 | |
3609 | /* If command timeout is specified put caller to wait till that time, |
3610 | * otherwise it would be blocking wait. If command gets timed out, it |
3611 | * will be aborted. |
3612 | */ |
3613 | if (buffer->ioarcb.cmd_timeout == 0) { |
3614 | wait_for_completion(&cmd->wait_for_completion); |
3615 | } else if (!wait_for_completion_timeout( |
3616 | &cmd->wait_for_completion, |
3617 | msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) { |
3618 | |
3619 | pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n", |
3620 | le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2), |
3621 | cmd->ioa_cb->ioarcb.cdb[0]); |
3622 | |
3623 | rc = -ETIMEDOUT; |
3624 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
3625 | cancel_cmd = pmcraid_abort_cmd(cmd); |
3626 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
3627 | |
3628 | if (cancel_cmd) { |
3629 | wait_for_completion(&cancel_cmd->wait_for_completion); |
3630 | pmcraid_return_cmd(cancel_cmd); |
3631 | } |
3632 | |
3633 | goto out_free_sglist; |
3634 | } |
3635 | |
3636 | /* If the command failed for any reason, copy entire IOASA buffer and |
3637 | * return IOCTL success. If copying IOASA to user-buffer fails, return |
3638 | * EFAULT |
3639 | */ |
3640 | if (le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)) { |
3641 | |
3642 | void *ioasa = |
3643 | (void *)(arg + |
3644 | offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa)); |
3645 | |
3646 | pmcraid_info("command failed with %x\n", |
3647 | le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
3648 | if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa, |
3649 | sizeof(struct pmcraid_ioasa))) { |
3650 | pmcraid_err("failed to copy ioasa buffer to user\n"); |
3651 | rc = -EFAULT; |
3652 | } |
3653 | } |
3654 | /* If the data transfer was from device, copy the data onto user |
3655 | * buffers |
3656 | */ |
3657 | else if (direction == DMA_FROM_DEVICE && request_size > 0) { |
3658 | rc = pmcraid_copy_sglist(cmd->sglist, |
3659 | request_buffer, |
3660 | request_size, |
3661 | direction); |
3662 | if (rc) { |
3663 | pmcraid_err("failed to copy user buffer\n"); |
3664 | rc = -EFAULT; |
3665 | } |
3666 | } |
3667 | |
3668 | out_free_sglist: |
3669 | pmcraid_release_passthrough_ioadls(cmd, request_size, direction); |
3670 | pmcraid_return_cmd(cmd); |
3671 | |
3672 | out_free_buffer: |
3673 | kfree(buffer); |
3674 | |
3675 | return rc; |
3676 | } |
3677 | |
3678 | |
3679 | |
3680 | |
3681 | /** |
3682 | * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself |
3683 | * |
3684 | * @pinstance: pointer to adapter instance structure |
3685 | * @cmd: ioctl command passed in |
3686 | * @buflen: length of user_buffer |
3687 | * @user_buffer: user buffer pointer |
3688 | * |
3689 | * Return Value |
3690 | * 0 in case of success, otherwise appropriate error code |
3691 | */ |
3692 | static long pmcraid_ioctl_driver( |
3693 | struct pmcraid_instance *pinstance, |
3694 | unsigned int cmd, |
3695 | unsigned int buflen, |
3696 | void __user *user_buffer |
3697 | ) |
3698 | { |
3699 | int rc = -ENOSYS; |
3700 | |
3701 | if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) { |
3702 | pmcraid_err("ioctl_driver: access fault in request buffer \n"); |
3703 | return -EFAULT; |
3704 | } |
3705 | |
3706 | switch (cmd) { |
3707 | case PMCRAID_IOCTL_RESET_ADAPTER: |
3708 | pmcraid_reset_bringup(pinstance); |
3709 | rc = 0; |
3710 | break; |
3711 | |
3712 | default: |
3713 | break; |
3714 | } |
3715 | |
3716 | return rc; |
3717 | } |
3718 | |
3719 | /** |
3720 | * pmcraid_check_ioctl_buffer - check for proper access to user buffer |
3721 | * |
3722 | * @cmd: ioctl command |
3723 | * @arg: user buffer |
3724 | * @hdr: pointer to kernel memory for pmcraid_ioctl_header |
3725 | * |
3726 | * Return Value |
3727 | * negetive error code if there are access issues, otherwise zero. |
3728 | * Upon success, returns ioctl header copied out of user buffer. |
3729 | */ |
3730 | |
3731 | static int pmcraid_check_ioctl_buffer( |
3732 | int cmd, |
3733 | void __user *arg, |
3734 | struct pmcraid_ioctl_header *hdr |
3735 | ) |
3736 | { |
3737 | int rc = 0; |
3738 | int access = VERIFY_READ; |
3739 | |
3740 | if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) { |
3741 | pmcraid_err("couldn't copy ioctl header from user buffer\n"); |
3742 | return -EFAULT; |
3743 | } |
3744 | |
3745 | /* check for valid driver signature */ |
3746 | rc = memcmp(hdr->signature, |
3747 | PMCRAID_IOCTL_SIGNATURE, |
3748 | sizeof(hdr->signature)); |
3749 | if (rc) { |
3750 | pmcraid_err("signature verification failed\n"); |
3751 | return -EINVAL; |
3752 | } |
3753 | |
3754 | /* buffer length can't be negetive */ |
3755 | if (hdr->buffer_length < 0) { |
3756 | pmcraid_err("ioctl: invalid buffer length specified\n"); |
3757 | return -EINVAL; |
3758 | } |
3759 | |
3760 | /* check for appropriate buffer access */ |
3761 | if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ) |
3762 | access = VERIFY_WRITE; |
3763 | |
3764 | rc = access_ok(access, |
3765 | (arg + sizeof(struct pmcraid_ioctl_header)), |
3766 | hdr->buffer_length); |
3767 | if (!rc) { |
3768 | pmcraid_err("access failed for user buffer of size %d\n", |
3769 | hdr->buffer_length); |
3770 | return -EFAULT; |
3771 | } |
3772 | |
3773 | return 0; |
3774 | } |
3775 | |
3776 | /** |
3777 | * pmcraid_ioctl - char node ioctl entry point |
3778 | */ |
3779 | static long pmcraid_chr_ioctl( |
3780 | struct file *filep, |
3781 | unsigned int cmd, |
3782 | unsigned long arg |
3783 | ) |
3784 | { |
3785 | struct pmcraid_instance *pinstance = NULL; |
3786 | struct pmcraid_ioctl_header *hdr = NULL; |
3787 | int retval = -ENOTTY; |
3788 | |
3789 | hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header)); |
3790 | |
3791 | if (!hdr) { |
3792 | pmcraid_err("faile to allocate memory for ioctl header\n"); |
3793 | return -ENOMEM; |
3794 | } |
3795 | |
3796 | retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr); |
3797 | |
3798 | if (retval) { |
3799 | pmcraid_info("chr_ioctl: header check failed\n"); |
3800 | kfree(hdr); |
3801 | return retval; |
3802 | } |
3803 | |
3804 | pinstance = (struct pmcraid_instance *)filep->private_data; |
3805 | |
3806 | if (!pinstance) { |
3807 | pmcraid_info("adapter instance is not found\n"); |
3808 | kfree(hdr); |
3809 | return -ENOTTY; |
3810 | } |
3811 | |
3812 | switch (_IOC_TYPE(cmd)) { |
3813 | |
3814 | case PMCRAID_PASSTHROUGH_IOCTL: |
3815 | /* If ioctl code is to download microcode, we need to block |
3816 | * mid-layer requests. |
3817 | */ |
3818 | if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE) |
3819 | scsi_block_requests(pinstance->host); |
3820 | |
3821 | retval = pmcraid_ioctl_passthrough(pinstance, |
3822 | cmd, |
3823 | hdr->buffer_length, |
3824 | arg); |
3825 | |
3826 | if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE) |
3827 | scsi_unblock_requests(pinstance->host); |
3828 | break; |
3829 | |
3830 | case PMCRAID_DRIVER_IOCTL: |
3831 | arg += sizeof(struct pmcraid_ioctl_header); |
3832 | retval = pmcraid_ioctl_driver(pinstance, |
3833 | cmd, |
3834 | hdr->buffer_length, |
3835 | (void __user *)arg); |
3836 | break; |
3837 | |
3838 | default: |
3839 | retval = -ENOTTY; |
3840 | break; |
3841 | } |
3842 | |
3843 | kfree(hdr); |
3844 | |
3845 | return retval; |
3846 | } |
3847 | |
3848 | /** |
3849 | * File operations structure for management interface |
3850 | */ |
3851 | static const struct file_operations pmcraid_fops = { |
3852 | .owner = THIS_MODULE, |
3853 | .open = pmcraid_chr_open, |
3854 | .release = pmcraid_chr_release, |
3855 | .fasync = pmcraid_chr_fasync, |
3856 | .unlocked_ioctl = pmcraid_chr_ioctl, |
3857 | #ifdef CONFIG_COMPAT |
3858 | .compat_ioctl = pmcraid_chr_ioctl, |
3859 | #endif |
3860 | }; |
3861 | |
3862 | |
3863 | |
3864 | |
3865 | /** |
3866 | * pmcraid_show_log_level - Display adapter's error logging level |
3867 | * @dev: class device struct |
3868 | * @buf: buffer |
3869 | * |
3870 | * Return value: |
3871 | * number of bytes printed to buffer |
3872 | */ |
3873 | static ssize_t pmcraid_show_log_level( |
3874 | struct device *dev, |
3875 | struct device_attribute *attr, |
3876 | char *buf) |
3877 | { |
3878 | struct Scsi_Host *shost = class_to_shost(dev); |
3879 | struct pmcraid_instance *pinstance = |
3880 | (struct pmcraid_instance *)shost->hostdata; |
3881 | return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level); |
3882 | } |
3883 | |
3884 | /** |
3885 | * pmcraid_store_log_level - Change the adapter's error logging level |
3886 | * @dev: class device struct |
3887 | * @buf: buffer |
3888 | * @count: not used |
3889 | * |
3890 | * Return value: |
3891 | * number of bytes printed to buffer |
3892 | */ |
3893 | static ssize_t pmcraid_store_log_level( |
3894 | struct device *dev, |
3895 | struct device_attribute *attr, |
3896 | const char *buf, |
3897 | size_t count |
3898 | ) |
3899 | { |
3900 | struct Scsi_Host *shost; |
3901 | struct pmcraid_instance *pinstance; |
3902 | unsigned long val; |
3903 | |
3904 | if (strict_strtoul(buf, 10, &val)) |
3905 | return -EINVAL; |
3906 | /* log-level should be from 0 to 2 */ |
3907 | if (val > 2) |
3908 | return -EINVAL; |
3909 | |
3910 | shost = class_to_shost(dev); |
3911 | pinstance = (struct pmcraid_instance *)shost->hostdata; |
3912 | pinstance->current_log_level = val; |
3913 | |
3914 | return strlen(buf); |
3915 | } |
3916 | |
3917 | static struct device_attribute pmcraid_log_level_attr = { |
3918 | .attr = { |
3919 | .name = "log_level", |
3920 | .mode = S_IRUGO | S_IWUSR, |
3921 | }, |
3922 | .show = pmcraid_show_log_level, |
3923 | .store = pmcraid_store_log_level, |
3924 | }; |
3925 | |
3926 | /** |
3927 | * pmcraid_show_drv_version - Display driver version |
3928 | * @dev: class device struct |
3929 | * @buf: buffer |
3930 | * |
3931 | * Return value: |
3932 | * number of bytes printed to buffer |
3933 | */ |
3934 | static ssize_t pmcraid_show_drv_version( |
3935 | struct device *dev, |
3936 | struct device_attribute *attr, |
3937 | char *buf |
3938 | ) |
3939 | { |
3940 | return snprintf(buf, PAGE_SIZE, "version: %s, build date: %s\n", |
3941 | PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE); |
3942 | } |
3943 | |
3944 | static struct device_attribute pmcraid_driver_version_attr = { |
3945 | .attr = { |
3946 | .name = "drv_version", |
3947 | .mode = S_IRUGO, |
3948 | }, |
3949 | .show = pmcraid_show_drv_version, |
3950 | }; |
3951 | |
3952 | /** |
3953 | * pmcraid_show_io_adapter_id - Display driver assigned adapter id |
3954 | * @dev: class device struct |
3955 | * @buf: buffer |
3956 | * |
3957 | * Return value: |
3958 | * number of bytes printed to buffer |
3959 | */ |
3960 | static ssize_t pmcraid_show_adapter_id( |
3961 | struct device *dev, |
3962 | struct device_attribute *attr, |
3963 | char *buf |
3964 | ) |
3965 | { |
3966 | struct Scsi_Host *shost = class_to_shost(dev); |
3967 | struct pmcraid_instance *pinstance = |
3968 | (struct pmcraid_instance *)shost->hostdata; |
3969 | u32 adapter_id = (pinstance->pdev->bus->number << 8) | |
3970 | pinstance->pdev->devfn; |
3971 | u32 aen_group = pmcraid_event_family.id; |
3972 | |
3973 | return snprintf(buf, PAGE_SIZE, |
3974 | "adapter id: %d\nminor: %d\naen group: %d\n", |
3975 | adapter_id, MINOR(pinstance->cdev.dev), aen_group); |
3976 | } |
3977 | |
3978 | static struct device_attribute pmcraid_adapter_id_attr = { |
3979 | .attr = { |
3980 | .name = "adapter_id", |
3981 | .mode = S_IRUGO | S_IWUSR, |
3982 | }, |
3983 | .show = pmcraid_show_adapter_id, |
3984 | }; |
3985 | |
3986 | static struct device_attribute *pmcraid_host_attrs[] = { |
3987 | &pmcraid_log_level_attr, |
3988 | &pmcraid_driver_version_attr, |
3989 | &pmcraid_adapter_id_attr, |
3990 | NULL, |
3991 | }; |
3992 | |
3993 | |
3994 | /* host template structure for pmcraid driver */ |
3995 | static struct scsi_host_template pmcraid_host_template = { |
3996 | .module = THIS_MODULE, |
3997 | .name = PMCRAID_DRIVER_NAME, |
3998 | .queuecommand = pmcraid_queuecommand, |
3999 | .eh_abort_handler = pmcraid_eh_abort_handler, |
4000 | .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler, |
4001 | .eh_target_reset_handler = pmcraid_eh_target_reset_handler, |
4002 | .eh_device_reset_handler = pmcraid_eh_device_reset_handler, |
4003 | .eh_host_reset_handler = pmcraid_eh_host_reset_handler, |
4004 | |
4005 | .slave_alloc = pmcraid_slave_alloc, |
4006 | .slave_configure = pmcraid_slave_configure, |
4007 | .slave_destroy = pmcraid_slave_destroy, |
4008 | .change_queue_depth = pmcraid_change_queue_depth, |
4009 | .change_queue_type = pmcraid_change_queue_type, |
4010 | .can_queue = PMCRAID_MAX_IO_CMD, |
4011 | .this_id = -1, |
4012 | .sg_tablesize = PMCRAID_MAX_IOADLS, |
4013 | .max_sectors = PMCRAID_IOA_MAX_SECTORS, |
4014 | .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN, |
4015 | .use_clustering = ENABLE_CLUSTERING, |
4016 | .shost_attrs = pmcraid_host_attrs, |
4017 | .proc_name = PMCRAID_DRIVER_NAME |
4018 | }; |
4019 | |
4020 | /** |
4021 | * pmcraid_isr_common - Common interrupt handler routine |
4022 | * |
4023 | * @pinstance: pointer to adapter instance |
4024 | * @intrs: active interrupts (contents of ioa_host_interrupt register) |
4025 | * @hrrq_id: Host RRQ index |
4026 | * |
4027 | * Return Value |
4028 | * none |
4029 | */ |
4030 | static void pmcraid_isr_common( |
4031 | struct pmcraid_instance *pinstance, |
4032 | u32 intrs, |
4033 | int hrrq_id |
4034 | ) |
4035 | { |
4036 | u32 intrs_clear = |
4037 | (intrs & INTRS_CRITICAL_OP_IN_PROGRESS) ? intrs |
4038 | : INTRS_HRRQ_VALID; |
4039 | iowrite32(intrs_clear, |
4040 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
4041 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
4042 | |
4043 | /* hrrq valid bit was set, schedule tasklet to handle the response */ |
4044 | if (intrs_clear == INTRS_HRRQ_VALID) |
4045 | tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id])); |
4046 | } |
4047 | |
4048 | /** |
4049 | * pmcraid_isr - implements interrupt handling routine |
4050 | * |
4051 | * @irq: interrupt vector number |
4052 | * @dev_id: pointer hrrq_vector |
4053 | * |
4054 | * Return Value |
4055 | * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored |
4056 | */ |
4057 | static irqreturn_t pmcraid_isr(int irq, void *dev_id) |
4058 | { |
4059 | struct pmcraid_isr_param *hrrq_vector; |
4060 | struct pmcraid_instance *pinstance; |
4061 | unsigned long lock_flags; |
4062 | u32 intrs; |
4063 | |
4064 | /* In case of legacy interrupt mode where interrupts are shared across |
4065 | * isrs, it may be possible that the current interrupt is not from IOA |
4066 | */ |
4067 | if (!dev_id) { |
4068 | printk(KERN_INFO "%s(): NULL host pointer\n", __func__); |
4069 | return IRQ_NONE; |
4070 | } |
4071 | |
4072 | hrrq_vector = (struct pmcraid_isr_param *)dev_id; |
4073 | pinstance = hrrq_vector->drv_inst; |
4074 | |
4075 | /* Acquire the lock (currently host_lock) while processing interrupts. |
4076 | * This interval is small as most of the response processing is done by |
4077 | * tasklet without the lock. |
4078 | */ |
4079 | spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
4080 | intrs = pmcraid_read_interrupts(pinstance); |
4081 | |
4082 | if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0)) { |
4083 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
4084 | return IRQ_NONE; |
4085 | } |
4086 | |
4087 | /* Any error interrupts including unit_check, initiate IOA reset. |
4088 | * In case of unit check indicate to reset_sequence that IOA unit |
4089 | * checked and prepare for a dump during reset sequence |
4090 | */ |
4091 | if (intrs & PMCRAID_ERROR_INTERRUPTS) { |
4092 | |
4093 | if (intrs & INTRS_IOA_UNIT_CHECK) |
4094 | pinstance->ioa_unit_check = 1; |
4095 | |
4096 | iowrite32(intrs, |
4097 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
4098 | pmcraid_err("ISR: error interrupts: %x initiating reset\n", |
4099 | intrs); |
4100 | intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
4101 | pmcraid_initiate_reset(pinstance); |
4102 | } else { |
4103 | pmcraid_isr_common(pinstance, intrs, hrrq_vector->hrrq_id); |
4104 | } |
4105 | |
4106 | spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
4107 | |
4108 | return IRQ_HANDLED; |
4109 | } |
4110 | |
4111 | |
4112 | /** |
4113 | * pmcraid_worker_function - worker thread function |
4114 | * |
4115 | * @workp: pointer to struct work queue |
4116 | * |
4117 | * Return Value |
4118 | * None |
4119 | */ |
4120 | |
4121 | static void pmcraid_worker_function(struct work_struct *workp) |
4122 | { |
4123 | struct pmcraid_instance *pinstance; |
4124 | struct pmcraid_resource_entry *res; |
4125 | struct pmcraid_resource_entry *temp; |
4126 | struct scsi_device *sdev; |
4127 | unsigned long lock_flags; |
4128 | unsigned long host_lock_flags; |
4129 | u8 bus, target, lun; |
4130 | |
4131 | pinstance = container_of(workp, struct pmcraid_instance, worker_q); |
4132 | /* add resources only after host is added into system */ |
4133 | if (!atomic_read(&pinstance->expose_resources)) |
4134 | return; |
4135 | |
4136 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
4137 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) { |
4138 | |
4139 | if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) { |
4140 | sdev = res->scsi_dev; |
4141 | |
4142 | /* host_lock must be held before calling |
4143 | * scsi_device_get |
4144 | */ |
4145 | spin_lock_irqsave(pinstance->host->host_lock, |
4146 | host_lock_flags); |
4147 | if (!scsi_device_get(sdev)) { |
4148 | spin_unlock_irqrestore( |
4149 | pinstance->host->host_lock, |
4150 | host_lock_flags); |
4151 | pmcraid_info("deleting %x from midlayer\n", |
4152 | res->cfg_entry.resource_address); |
4153 | list_move_tail(&res->queue, |
4154 | &pinstance->free_res_q); |
4155 | spin_unlock_irqrestore( |
4156 | &pinstance->resource_lock, |
4157 | lock_flags); |
4158 | scsi_remove_device(sdev); |
4159 | scsi_device_put(sdev); |
4160 | spin_lock_irqsave(&pinstance->resource_lock, |
4161 | lock_flags); |
4162 | res->change_detected = 0; |
4163 | } else { |
4164 | spin_unlock_irqrestore( |
4165 | pinstance->host->host_lock, |
4166 | host_lock_flags); |
4167 | } |
4168 | } |
4169 | } |
4170 | |
4171 | list_for_each_entry(res, &pinstance->used_res_q, queue) { |
4172 | |
4173 | if (res->change_detected == RES_CHANGE_ADD) { |
4174 | |
4175 | if (!pmcraid_expose_resource(&res->cfg_entry)) |
4176 | continue; |
4177 | |
4178 | if (RES_IS_VSET(res->cfg_entry)) { |
4179 | bus = PMCRAID_VSET_BUS_ID; |
4180 | target = res->cfg_entry.unique_flags1; |
4181 | lun = PMCRAID_VSET_LUN_ID; |
4182 | } else { |
4183 | bus = PMCRAID_PHYS_BUS_ID; |
4184 | target = |
4185 | RES_TARGET( |
4186 | res->cfg_entry.resource_address); |
4187 | lun = RES_LUN(res->cfg_entry.resource_address); |
4188 | } |
4189 | |
4190 | res->change_detected = 0; |
4191 | spin_unlock_irqrestore(&pinstance->resource_lock, |
4192 | lock_flags); |
4193 | scsi_add_device(pinstance->host, bus, target, lun); |
4194 | spin_lock_irqsave(&pinstance->resource_lock, |
4195 | lock_flags); |
4196 | } |
4197 | } |
4198 | |
4199 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
4200 | } |
4201 | |
4202 | /** |
4203 | * pmcraid_tasklet_function - Tasklet function |
4204 | * |
4205 | * @instance: pointer to msix param structure |
4206 | * |
4207 | * Return Value |
4208 | * None |
4209 | */ |
4210 | void pmcraid_tasklet_function(unsigned long instance) |
4211 | { |
4212 | struct pmcraid_isr_param *hrrq_vector; |
4213 | struct pmcraid_instance *pinstance; |
4214 | unsigned long hrrq_lock_flags; |
4215 | unsigned long pending_lock_flags; |
4216 | unsigned long host_lock_flags; |
4217 | spinlock_t *lockp; /* hrrq buffer lock */ |
4218 | int id; |
4219 | u32 intrs; |
4220 | __le32 resp; |
4221 | |
4222 | hrrq_vector = (struct pmcraid_isr_param *)instance; |
4223 | pinstance = hrrq_vector->drv_inst; |
4224 | id = hrrq_vector->hrrq_id; |
4225 | lockp = &(pinstance->hrrq_lock[id]); |
4226 | intrs = pmcraid_read_interrupts(pinstance); |
4227 | |
4228 | /* If interrupts was as part of the ioa initialization, clear and mask |
4229 | * it. Delete the timer and wakeup the reset engine to proceed with |
4230 | * reset sequence |
4231 | */ |
4232 | if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) { |
4233 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
4234 | pinstance->int_regs.ioa_host_interrupt_mask_reg); |
4235 | iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
4236 | pinstance->int_regs.ioa_host_interrupt_clr_reg); |
4237 | |
4238 | if (pinstance->reset_cmd != NULL) { |
4239 | del_timer(&pinstance->reset_cmd->timer); |
4240 | spin_lock_irqsave(pinstance->host->host_lock, |
4241 | host_lock_flags); |
4242 | pinstance->reset_cmd->cmd_done(pinstance->reset_cmd); |
4243 | spin_unlock_irqrestore(pinstance->host->host_lock, |
4244 | host_lock_flags); |
4245 | } |
4246 | return; |
4247 | } |
4248 | |
4249 | /* loop through each of the commands responded by IOA. Each HRRQ buf is |
4250 | * protected by its own lock. Traversals must be done within this lock |
4251 | * as there may be multiple tasklets running on multiple CPUs. Note |
4252 | * that the lock is held just for picking up the response handle and |
4253 | * manipulating hrrq_curr/toggle_bit values. |
4254 | */ |
4255 | spin_lock_irqsave(lockp, hrrq_lock_flags); |
4256 | |
4257 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); |
4258 | |
4259 | while ((resp & HRRQ_TOGGLE_BIT) == |
4260 | pinstance->host_toggle_bit[id]) { |
4261 | |
4262 | int cmd_index = resp >> 2; |
4263 | struct pmcraid_cmd *cmd = NULL; |
4264 | |
4265 | if (cmd_index < PMCRAID_MAX_CMD) { |
4266 | cmd = pinstance->cmd_list[cmd_index]; |
4267 | } else { |
4268 | /* In case of invalid response handle, initiate IOA |
4269 | * reset sequence. |
4270 | */ |
4271 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); |
4272 | |
4273 | pmcraid_err("Invalid response %d initiating reset\n", |
4274 | cmd_index); |
4275 | |
4276 | spin_lock_irqsave(pinstance->host->host_lock, |
4277 | host_lock_flags); |
4278 | pmcraid_initiate_reset(pinstance); |
4279 | spin_unlock_irqrestore(pinstance->host->host_lock, |
4280 | host_lock_flags); |
4281 | |
4282 | spin_lock_irqsave(lockp, hrrq_lock_flags); |
4283 | break; |
4284 | } |
4285 | |
4286 | if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) { |
4287 | pinstance->hrrq_curr[id]++; |
4288 | } else { |
4289 | pinstance->hrrq_curr[id] = pinstance->hrrq_start[id]; |
4290 | pinstance->host_toggle_bit[id] ^= 1u; |
4291 | } |
4292 | |
4293 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); |
4294 | |
4295 | spin_lock_irqsave(&pinstance->pending_pool_lock, |
4296 | pending_lock_flags); |
4297 | list_del(&cmd->free_list); |
4298 | spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
4299 | pending_lock_flags); |
4300 | del_timer(&cmd->timer); |
4301 | atomic_dec(&pinstance->outstanding_cmds); |
4302 | |
4303 | if (cmd->cmd_done == pmcraid_ioa_reset) { |
4304 | spin_lock_irqsave(pinstance->host->host_lock, |
4305 | host_lock_flags); |
4306 | cmd->cmd_done(cmd); |
4307 | spin_unlock_irqrestore(pinstance->host->host_lock, |
4308 | host_lock_flags); |
4309 | } else if (cmd->cmd_done != NULL) { |
4310 | cmd->cmd_done(cmd); |
4311 | } |
4312 | /* loop over until we are done with all responses */ |
4313 | spin_lock_irqsave(lockp, hrrq_lock_flags); |
4314 | resp = le32_to_cpu(*(pinstance->hrrq_curr[id])); |
4315 | } |
4316 | |
4317 | spin_unlock_irqrestore(lockp, hrrq_lock_flags); |
4318 | } |
4319 | |
4320 | /** |
4321 | * pmcraid_unregister_interrupt_handler - de-register interrupts handlers |
4322 | * @pinstance: pointer to adapter instance structure |
4323 | * |
4324 | * This routine un-registers registered interrupt handler and |
4325 | * also frees irqs/vectors. |
4326 | * |
4327 | * Retun Value |
4328 | * None |
4329 | */ |
4330 | static |
4331 | void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance) |
4332 | { |
4333 | free_irq(pinstance->pdev->irq, &(pinstance->hrrq_vector[0])); |
4334 | } |
4335 | |
4336 | /** |
4337 | * pmcraid_register_interrupt_handler - registers interrupt handler |
4338 | * @pinstance: pointer to per-adapter instance structure |
4339 | * |
4340 | * Return Value |
4341 | * 0 on success, non-zero error code otherwise. |
4342 | */ |
4343 | static int |
4344 | pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance) |
4345 | { |
4346 | struct pci_dev *pdev = pinstance->pdev; |
4347 | |
4348 | pinstance->hrrq_vector[0].hrrq_id = 0; |
4349 | pinstance->hrrq_vector[0].drv_inst = pinstance; |
4350 | pinstance->hrrq_vector[0].vector = 0; |
4351 | pinstance->num_hrrq = 1; |
4352 | return request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED, |
4353 | PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]); |
4354 | } |
4355 | |
4356 | /** |
4357 | * pmcraid_release_cmd_blocks - release buufers allocated for command blocks |
4358 | * @pinstance: per adapter instance structure pointer |
4359 | * @max_index: number of buffer blocks to release |
4360 | * |
4361 | * Return Value |
4362 | * None |
4363 | */ |
4364 | static void |
4365 | pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index) |
4366 | { |
4367 | int i; |
4368 | for (i = 0; i < max_index; i++) { |
4369 | kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]); |
4370 | pinstance->cmd_list[i] = NULL; |
4371 | } |
4372 | kmem_cache_destroy(pinstance->cmd_cachep); |
4373 | pinstance->cmd_cachep = NULL; |
4374 | } |
4375 | |
4376 | /** |
4377 | * pmcraid_release_control_blocks - releases buffers alloced for control blocks |
4378 | * @pinstance: pointer to per adapter instance structure |
4379 | * @max_index: number of buffers (from 0 onwards) to release |
4380 | * |
4381 | * This function assumes that the command blocks for which control blocks are |
4382 | * linked are not released. |
4383 | * |
4384 | * Return Value |
4385 | * None |
4386 | */ |
4387 | static void |
4388 | pmcraid_release_control_blocks( |
4389 | struct pmcraid_instance *pinstance, |
4390 | int max_index |
4391 | ) |
4392 | { |
4393 | int i; |
4394 | |
4395 | if (pinstance->control_pool == NULL) |
4396 | return; |
4397 | |
4398 | for (i = 0; i < max_index; i++) { |
4399 | pci_pool_free(pinstance->control_pool, |
4400 | pinstance->cmd_list[i]->ioa_cb, |
4401 | pinstance->cmd_list[i]->ioa_cb_bus_addr); |
4402 | pinstance->cmd_list[i]->ioa_cb = NULL; |
4403 | pinstance->cmd_list[i]->ioa_cb_bus_addr = 0; |
4404 | } |
4405 | pci_pool_destroy(pinstance->control_pool); |
4406 | pinstance->control_pool = NULL; |
4407 | } |
4408 | |
4409 | /** |
4410 | * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures |
4411 | * @pinstance - pointer to per adapter instance structure |
4412 | * |
4413 | * Allocates memory for command blocks using kernel slab allocator. |
4414 | * |
4415 | * Return Value |
4416 | * 0 in case of success; -ENOMEM in case of failure |
4417 | */ |
4418 | static int __devinit |
4419 | pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance) |
4420 | { |
4421 | int i; |
4422 | |
4423 | sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d", |
4424 | pinstance->host->unique_id); |
4425 | |
4426 | |
4427 | pinstance->cmd_cachep = kmem_cache_create( |
4428 | pinstance->cmd_pool_name, |
4429 | sizeof(struct pmcraid_cmd), 0, |
4430 | SLAB_HWCACHE_ALIGN, NULL); |
4431 | if (!pinstance->cmd_cachep) |
4432 | return -ENOMEM; |
4433 | |
4434 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { |
4435 | pinstance->cmd_list[i] = |
4436 | kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL); |
4437 | if (!pinstance->cmd_list[i]) { |
4438 | pmcraid_release_cmd_blocks(pinstance, i); |
4439 | return -ENOMEM; |
4440 | } |
4441 | } |
4442 | return 0; |
4443 | } |
4444 | |
4445 | /** |
4446 | * pmcraid_allocate_control_blocks - allocates memory control blocks |
4447 | * @pinstance : pointer to per adapter instance structure |
4448 | * |
4449 | * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs |
4450 | * and IOASAs. This is called after command blocks are already allocated. |
4451 | * |
4452 | * Return Value |
4453 | * 0 in case it can allocate all control blocks, otherwise -ENOMEM |
4454 | */ |
4455 | static int __devinit |
4456 | pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance) |
4457 | { |
4458 | int i; |
4459 | |
4460 | sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d", |
4461 | pinstance->host->unique_id); |
4462 | |
4463 | pinstance->control_pool = |
4464 | pci_pool_create(pinstance->ctl_pool_name, |
4465 | pinstance->pdev, |
4466 | sizeof(struct pmcraid_control_block), |
4467 | PMCRAID_IOARCB_ALIGNMENT, 0); |
4468 | |
4469 | if (!pinstance->control_pool) |
4470 | return -ENOMEM; |
4471 | |
4472 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { |
4473 | pinstance->cmd_list[i]->ioa_cb = |
4474 | pci_pool_alloc( |
4475 | pinstance->control_pool, |
4476 | GFP_KERNEL, |
4477 | &(pinstance->cmd_list[i]->ioa_cb_bus_addr)); |
4478 | |
4479 | if (!pinstance->cmd_list[i]->ioa_cb) { |
4480 | pmcraid_release_control_blocks(pinstance, i); |
4481 | return -ENOMEM; |
4482 | } |
4483 | memset(pinstance->cmd_list[i]->ioa_cb, 0, |
4484 | sizeof(struct pmcraid_control_block)); |
4485 | } |
4486 | return 0; |
4487 | } |
4488 | |
4489 | /** |
4490 | * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s) |
4491 | * @pinstance: pointer to per adapter instance structure |
4492 | * @maxindex: size of hrrq buffer pointer array |
4493 | * |
4494 | * Return Value |
4495 | * None |
4496 | */ |
4497 | static void |
4498 | pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex) |
4499 | { |
4500 | int i; |
4501 | for (i = 0; i < maxindex; i++) { |
4502 | |
4503 | pci_free_consistent(pinstance->pdev, |
4504 | HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD, |
4505 | pinstance->hrrq_start[i], |
4506 | pinstance->hrrq_start_bus_addr[i]); |
4507 | |
4508 | /* reset pointers and toggle bit to zeros */ |
4509 | pinstance->hrrq_start[i] = NULL; |
4510 | pinstance->hrrq_start_bus_addr[i] = 0; |
4511 | pinstance->host_toggle_bit[i] = 0; |
4512 | } |
4513 | } |
4514 | |
4515 | /** |
4516 | * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers |
4517 | * @pinstance: pointer to per adapter instance structure |
4518 | * |
4519 | * Return value |
4520 | * 0 hrrq buffers are allocated, -ENOMEM otherwise. |
4521 | */ |
4522 | static int __devinit |
4523 | pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance) |
4524 | { |
4525 | int i; |
4526 | int buf_count = PMCRAID_MAX_CMD / pinstance->num_hrrq; |
4527 | |
4528 | for (i = 0; i < pinstance->num_hrrq; i++) { |
4529 | int buffer_size = HRRQ_ENTRY_SIZE * buf_count; |
4530 | |
4531 | pinstance->hrrq_start[i] = |
4532 | pci_alloc_consistent( |
4533 | pinstance->pdev, |
4534 | buffer_size, |
4535 | &(pinstance->hrrq_start_bus_addr[i])); |
4536 | |
4537 | if (pinstance->hrrq_start[i] == 0) { |
4538 | pmcraid_err("could not allocate host rrq: %d\n", i); |
4539 | pmcraid_release_host_rrqs(pinstance, i); |
4540 | return -ENOMEM; |
4541 | } |
4542 | |
4543 | memset(pinstance->hrrq_start[i], 0, buffer_size); |
4544 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i]; |
4545 | pinstance->hrrq_end[i] = |
4546 | pinstance->hrrq_start[i] + buf_count - 1; |
4547 | pinstance->host_toggle_bit[i] = 1; |
4548 | spin_lock_init(&pinstance->hrrq_lock[i]); |
4549 | } |
4550 | return 0; |
4551 | } |
4552 | |
4553 | /** |
4554 | * pmcraid_release_hcams - release HCAM buffers |
4555 | * |
4556 | * @pinstance: pointer to per adapter instance structure |
4557 | * |
4558 | * Return value |
4559 | * none |
4560 | */ |
4561 | static void pmcraid_release_hcams(struct pmcraid_instance *pinstance) |
4562 | { |
4563 | if (pinstance->ccn.msg != NULL) { |
4564 | pci_free_consistent(pinstance->pdev, |
4565 | PMCRAID_AEN_HDR_SIZE + |
4566 | sizeof(struct pmcraid_hcam_ccn), |
4567 | pinstance->ccn.msg, |
4568 | pinstance->ccn.baddr); |
4569 | |
4570 | pinstance->ccn.msg = NULL; |
4571 | pinstance->ccn.hcam = NULL; |
4572 | pinstance->ccn.baddr = 0; |
4573 | } |
4574 | |
4575 | if (pinstance->ldn.msg != NULL) { |
4576 | pci_free_consistent(pinstance->pdev, |
4577 | PMCRAID_AEN_HDR_SIZE + |
4578 | sizeof(struct pmcraid_hcam_ldn), |
4579 | pinstance->ldn.msg, |
4580 | pinstance->ldn.baddr); |
4581 | |
4582 | pinstance->ldn.msg = NULL; |
4583 | pinstance->ldn.hcam = NULL; |
4584 | pinstance->ldn.baddr = 0; |
4585 | } |
4586 | } |
4587 | |
4588 | /** |
4589 | * pmcraid_allocate_hcams - allocates HCAM buffers |
4590 | * @pinstance : pointer to per adapter instance structure |
4591 | * |
4592 | * Return Value: |
4593 | * 0 in case of successful allocation, non-zero otherwise |
4594 | */ |
4595 | static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance) |
4596 | { |
4597 | pinstance->ccn.msg = pci_alloc_consistent( |
4598 | pinstance->pdev, |
4599 | PMCRAID_AEN_HDR_SIZE + |
4600 | sizeof(struct pmcraid_hcam_ccn), |
4601 | &(pinstance->ccn.baddr)); |
4602 | |
4603 | pinstance->ldn.msg = pci_alloc_consistent( |
4604 | pinstance->pdev, |
4605 | PMCRAID_AEN_HDR_SIZE + |
4606 | sizeof(struct pmcraid_hcam_ldn), |
4607 | &(pinstance->ldn.baddr)); |
4608 | |
4609 | if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) { |
4610 | pmcraid_release_hcams(pinstance); |
4611 | } else { |
4612 | pinstance->ccn.hcam = |
4613 | (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE; |
4614 | pinstance->ldn.hcam = |
4615 | (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE; |
4616 | |
4617 | atomic_set(&pinstance->ccn.ignore, 0); |
4618 | atomic_set(&pinstance->ldn.ignore, 0); |
4619 | } |
4620 | |
4621 | return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0; |
4622 | } |
4623 | |
4624 | /** |
4625 | * pmcraid_release_config_buffers - release config.table buffers |
4626 | * @pinstance: pointer to per adapter instance structure |
4627 | * |
4628 | * Return Value |
4629 | * none |
4630 | */ |
4631 | static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance) |
4632 | { |
4633 | if (pinstance->cfg_table != NULL && |
4634 | pinstance->cfg_table_bus_addr != 0) { |
4635 | pci_free_consistent(pinstance->pdev, |
4636 | sizeof(struct pmcraid_config_table), |
4637 | pinstance->cfg_table, |
4638 | pinstance->cfg_table_bus_addr); |
4639 | pinstance->cfg_table = NULL; |
4640 | pinstance->cfg_table_bus_addr = 0; |
4641 | } |
4642 | |
4643 | if (pinstance->res_entries != NULL) { |
4644 | int i; |
4645 | |
4646 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++) |
4647 | list_del(&pinstance->res_entries[i].queue); |
4648 | kfree(pinstance->res_entries); |
4649 | pinstance->res_entries = NULL; |
4650 | } |
4651 | |
4652 | pmcraid_release_hcams(pinstance); |
4653 | } |
4654 | |
4655 | /** |
4656 | * pmcraid_allocate_config_buffers - allocates DMAable memory for config table |
4657 | * @pinstance : pointer to per adapter instance structure |
4658 | * |
4659 | * Return Value |
4660 | * 0 for successful allocation, -ENOMEM for any failure |
4661 | */ |
4662 | static int __devinit |
4663 | pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance) |
4664 | { |
4665 | int i; |
4666 | |
4667 | pinstance->res_entries = |
4668 | kzalloc(sizeof(struct pmcraid_resource_entry) * |
4669 | PMCRAID_MAX_RESOURCES, GFP_KERNEL); |
4670 | |
4671 | if (NULL == pinstance->res_entries) { |
4672 | pmcraid_err("failed to allocate memory for resource table\n"); |
4673 | return -ENOMEM; |
4674 | } |
4675 | |
4676 | for (i = 0; i < PMCRAID_MAX_RESOURCES; i++) |
4677 | list_add_tail(&pinstance->res_entries[i].queue, |
4678 | &pinstance->free_res_q); |
4679 | |
4680 | pinstance->cfg_table = |
4681 | pci_alloc_consistent(pinstance->pdev, |
4682 | sizeof(struct pmcraid_config_table), |
4683 | &pinstance->cfg_table_bus_addr); |
4684 | |
4685 | if (NULL == pinstance->cfg_table) { |
4686 | pmcraid_err("couldn't alloc DMA memory for config table\n"); |
4687 | pmcraid_release_config_buffers(pinstance); |
4688 | return -ENOMEM; |
4689 | } |
4690 | |
4691 | if (pmcraid_allocate_hcams(pinstance)) { |
4692 | pmcraid_err("could not alloc DMA memory for HCAMS\n"); |
4693 | pmcraid_release_config_buffers(pinstance); |
4694 | return -ENOMEM; |
4695 | } |
4696 | |
4697 | return 0; |
4698 | } |
4699 | |
4700 | /** |
4701 | * pmcraid_init_tasklets - registers tasklets for response handling |
4702 | * |
4703 | * @pinstance: pointer adapter instance structure |
4704 | * |
4705 | * Return value |
4706 | * none |
4707 | */ |
4708 | static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance) |
4709 | { |
4710 | int i; |
4711 | for (i = 0; i < pinstance->num_hrrq; i++) |
4712 | tasklet_init(&pinstance->isr_tasklet[i], |
4713 | pmcraid_tasklet_function, |
4714 | (unsigned long)&pinstance->hrrq_vector[i]); |
4715 | } |
4716 | |
4717 | /** |
4718 | * pmcraid_kill_tasklets - destroys tasklets registered for response handling |
4719 | * |
4720 | * @pinstance: pointer to adapter instance structure |
4721 | * |
4722 | * Return value |
4723 | * none |
4724 | */ |
4725 | static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance) |
4726 | { |
4727 | int i; |
4728 | for (i = 0; i < pinstance->num_hrrq; i++) |
4729 | tasklet_kill(&pinstance->isr_tasklet[i]); |
4730 | } |
4731 | |
4732 | /** |
4733 | * pmcraid_init_buffers - allocates memory and initializes various structures |
4734 | * @pinstance: pointer to per adapter instance structure |
4735 | * |
4736 | * This routine pre-allocates memory based on the type of block as below: |
4737 | * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator, |
4738 | * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator |
4739 | * config-table entries : DMAable memory using pci_alloc_consistent |
4740 | * HostRRQs : DMAable memory, using pci_alloc_consistent |
4741 | * |
4742 | * Return Value |
4743 | * 0 in case all of the blocks are allocated, -ENOMEM otherwise. |
4744 | */ |
4745 | static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance) |
4746 | { |
4747 | int i; |
4748 | |
4749 | if (pmcraid_allocate_host_rrqs(pinstance)) { |
4750 | pmcraid_err("couldn't allocate memory for %d host rrqs\n", |
4751 | pinstance->num_hrrq); |
4752 | return -ENOMEM; |
4753 | } |
4754 | |
4755 | if (pmcraid_allocate_config_buffers(pinstance)) { |
4756 | pmcraid_err("couldn't allocate memory for config buffers\n"); |
4757 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
4758 | return -ENOMEM; |
4759 | } |
4760 | |
4761 | if (pmcraid_allocate_cmd_blocks(pinstance)) { |
4762 | pmcraid_err("couldn't allocate memory for cmd blocks \n"); |
4763 | pmcraid_release_config_buffers(pinstance); |
4764 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
4765 | return -ENOMEM; |
4766 | } |
4767 | |
4768 | if (pmcraid_allocate_control_blocks(pinstance)) { |
4769 | pmcraid_err("couldn't allocate memory control blocks \n"); |
4770 | pmcraid_release_config_buffers(pinstance); |
4771 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD); |
4772 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
4773 | return -ENOMEM; |
4774 | } |
4775 | |
4776 | /* Initialize all the command blocks and add them to free pool. No |
4777 | * need to lock (free_pool_lock) as this is done in initialization |
4778 | * itself |
4779 | */ |
4780 | for (i = 0; i < PMCRAID_MAX_CMD; i++) { |
4781 | struct pmcraid_cmd *cmdp = pinstance->cmd_list[i]; |
4782 | pmcraid_init_cmdblk(cmdp, i); |
4783 | cmdp->drv_inst = pinstance; |
4784 | list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool); |
4785 | } |
4786 | |
4787 | return 0; |
4788 | } |
4789 | |
4790 | /** |
4791 | * pmcraid_reinit_buffers - resets various buffer pointers |
4792 | * @pinstance: pointer to adapter instance |
4793 | * Return value |
4794 | * none |
4795 | */ |
4796 | static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance) |
4797 | { |
4798 | int i; |
4799 | int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD; |
4800 | |
4801 | for (i = 0; i < pinstance->num_hrrq; i++) { |
4802 | memset(pinstance->hrrq_start[i], 0, buffer_size); |
4803 | pinstance->hrrq_curr[i] = pinstance->hrrq_start[i]; |
4804 | pinstance->hrrq_end[i] = |
4805 | pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1; |
4806 | pinstance->host_toggle_bit[i] = 1; |
4807 | } |
4808 | } |
4809 | |
4810 | /** |
4811 | * pmcraid_init_instance - initialize per instance data structure |
4812 | * @pdev: pointer to pci device structure |
4813 | * @host: pointer to Scsi_Host structure |
4814 | * @mapped_pci_addr: memory mapped IOA configuration registers |
4815 | * |
4816 | * Return Value |
4817 | * 0 on success, non-zero in case of any failure |
4818 | */ |
4819 | static int __devinit pmcraid_init_instance( |
4820 | struct pci_dev *pdev, |
4821 | struct Scsi_Host *host, |
4822 | void __iomem *mapped_pci_addr |
4823 | ) |
4824 | { |
4825 | struct pmcraid_instance *pinstance = |
4826 | (struct pmcraid_instance *)host->hostdata; |
4827 | |
4828 | pinstance->host = host; |
4829 | pinstance->pdev = pdev; |
4830 | |
4831 | /* Initialize register addresses */ |
4832 | pinstance->mapped_dma_addr = mapped_pci_addr; |
4833 | |
4834 | /* Initialize chip-specific details */ |
4835 | { |
4836 | struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg; |
4837 | struct pmcraid_interrupts *pint_regs = &pinstance->int_regs; |
4838 | |
4839 | pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin; |
4840 | |
4841 | pint_regs->ioa_host_interrupt_reg = |
4842 | mapped_pci_addr + chip_cfg->ioa_host_intr; |
4843 | pint_regs->ioa_host_interrupt_clr_reg = |
4844 | mapped_pci_addr + chip_cfg->ioa_host_intr_clr; |
4845 | pint_regs->host_ioa_interrupt_reg = |
4846 | mapped_pci_addr + chip_cfg->host_ioa_intr; |
4847 | pint_regs->host_ioa_interrupt_clr_reg = |
4848 | mapped_pci_addr + chip_cfg->host_ioa_intr_clr; |
4849 | |
4850 | /* Current version of firmware exposes interrupt mask set |
4851 | * and mask clr registers through memory mapped bar0. |
4852 | */ |
4853 | pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox; |
4854 | pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus; |
4855 | pint_regs->ioa_host_interrupt_mask_reg = |
4856 | mapped_pci_addr + chip_cfg->ioa_host_mask; |
4857 | pint_regs->ioa_host_interrupt_mask_clr_reg = |
4858 | mapped_pci_addr + chip_cfg->ioa_host_mask_clr; |
4859 | pint_regs->global_interrupt_mask_reg = |
4860 | mapped_pci_addr + chip_cfg->global_intr_mask; |
4861 | }; |
4862 | |
4863 | pinstance->ioa_reset_attempts = 0; |
4864 | init_waitqueue_head(&pinstance->reset_wait_q); |
4865 | |
4866 | atomic_set(&pinstance->outstanding_cmds, 0); |
4867 | atomic_set(&pinstance->expose_resources, 0); |
4868 | |
4869 | INIT_LIST_HEAD(&pinstance->free_res_q); |
4870 | INIT_LIST_HEAD(&pinstance->used_res_q); |
4871 | INIT_LIST_HEAD(&pinstance->free_cmd_pool); |
4872 | INIT_LIST_HEAD(&pinstance->pending_cmd_pool); |
4873 | |
4874 | spin_lock_init(&pinstance->free_pool_lock); |
4875 | spin_lock_init(&pinstance->pending_pool_lock); |
4876 | spin_lock_init(&pinstance->resource_lock); |
4877 | mutex_init(&pinstance->aen_queue_lock); |
4878 | |
4879 | /* Work-queue (Shared) for deferred processing error handling */ |
4880 | INIT_WORK(&pinstance->worker_q, pmcraid_worker_function); |
4881 | |
4882 | /* Initialize the default log_level */ |
4883 | pinstance->current_log_level = pmcraid_log_level; |
4884 | |
4885 | /* Setup variables required for reset engine */ |
4886 | pinstance->ioa_state = IOA_STATE_UNKNOWN; |
4887 | pinstance->reset_cmd = NULL; |
4888 | return 0; |
4889 | } |
4890 | |
4891 | /** |
4892 | * pmcraid_release_buffers - release per-adapter buffers allocated |
4893 | * |
4894 | * @pinstance: pointer to adapter soft state |
4895 | * |
4896 | * Return Value |
4897 | * none |
4898 | */ |
4899 | static void pmcraid_release_buffers(struct pmcraid_instance *pinstance) |
4900 | { |
4901 | pmcraid_release_config_buffers(pinstance); |
4902 | pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD); |
4903 | pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD); |
4904 | pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq); |
4905 | |
4906 | } |
4907 | |
4908 | /** |
4909 | * pmcraid_shutdown - shutdown adapter controller. |
4910 | * @pdev: pci device struct |
4911 | * |
4912 | * Issues an adapter shutdown to the card waits for its completion |
4913 | * |
4914 | * Return value |
4915 | * none |
4916 | */ |
4917 | static void pmcraid_shutdown(struct pci_dev *pdev) |
4918 | { |
4919 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
4920 | pmcraid_reset_bringdown(pinstance); |
4921 | } |
4922 | |
4923 | |
4924 | /** |
4925 | * pmcraid_get_minor - returns unused minor number from minor number bitmap |
4926 | */ |
4927 | static unsigned short pmcraid_get_minor(void) |
4928 | { |
4929 | int minor; |
4930 | |
4931 | minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor)); |
4932 | __set_bit(minor, pmcraid_minor); |
4933 | return minor; |
4934 | } |
4935 | |
4936 | /** |
4937 | * pmcraid_release_minor - releases given minor back to minor number bitmap |
4938 | */ |
4939 | static void pmcraid_release_minor(unsigned short minor) |
4940 | { |
4941 | __clear_bit(minor, pmcraid_minor); |
4942 | } |
4943 | |
4944 | /** |
4945 | * pmcraid_setup_chrdev - allocates a minor number and registers a char device |
4946 | * |
4947 | * @pinstance: pointer to adapter instance for which to register device |
4948 | * |
4949 | * Return value |
4950 | * 0 in case of success, otherwise non-zero |
4951 | */ |
4952 | static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance) |
4953 | { |
4954 | int minor; |
4955 | int error; |
4956 | |
4957 | minor = pmcraid_get_minor(); |
4958 | cdev_init(&pinstance->cdev, &pmcraid_fops); |
4959 | pinstance->cdev.owner = THIS_MODULE; |
4960 | |
4961 | error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1); |
4962 | |
4963 | if (error) |
4964 | pmcraid_release_minor(minor); |
4965 | else |
4966 | device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor), |
4967 | NULL, "pmcsas%u", minor); |
4968 | return error; |
4969 | } |
4970 | |
4971 | /** |
4972 | * pmcraid_release_chrdev - unregisters per-adapter management interface |
4973 | * |
4974 | * @pinstance: pointer to adapter instance structure |
4975 | * |
4976 | * Return value |
4977 | * none |
4978 | */ |
4979 | static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance) |
4980 | { |
4981 | pmcraid_release_minor(MINOR(pinstance->cdev.dev)); |
4982 | device_destroy(pmcraid_class, |
4983 | MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev))); |
4984 | cdev_del(&pinstance->cdev); |
4985 | } |
4986 | |
4987 | /** |
4988 | * pmcraid_remove - IOA hot plug remove entry point |
4989 | * @pdev: pci device struct |
4990 | * |
4991 | * Return value |
4992 | * none |
4993 | */ |
4994 | static void __devexit pmcraid_remove(struct pci_dev *pdev) |
4995 | { |
4996 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
4997 | |
4998 | /* remove the management interface (/dev file) for this device */ |
4999 | pmcraid_release_chrdev(pinstance); |
5000 | |
5001 | /* remove host template from scsi midlayer */ |
5002 | scsi_remove_host(pinstance->host); |
5003 | |
5004 | /* block requests from mid-layer */ |
5005 | scsi_block_requests(pinstance->host); |
5006 | |
5007 | /* initiate shutdown adapter */ |
5008 | pmcraid_shutdown(pdev); |
5009 | |
5010 | pmcraid_disable_interrupts(pinstance, ~0); |
5011 | flush_scheduled_work(); |
5012 | |
5013 | pmcraid_kill_tasklets(pinstance); |
5014 | pmcraid_unregister_interrupt_handler(pinstance); |
5015 | pmcraid_release_buffers(pinstance); |
5016 | iounmap(pinstance->mapped_dma_addr); |
5017 | pci_release_regions(pdev); |
5018 | scsi_host_put(pinstance->host); |
5019 | pci_disable_device(pdev); |
5020 | |
5021 | return; |
5022 | } |
5023 | |
5024 | #ifdef CONFIG_PM |
5025 | /** |
5026 | * pmcraid_suspend - driver suspend entry point for power management |
5027 | * @pdev: PCI device structure |
5028 | * @state: PCI power state to suspend routine |
5029 | * |
5030 | * Return Value - 0 always |
5031 | */ |
5032 | static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state) |
5033 | { |
5034 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
5035 | |
5036 | pmcraid_shutdown(pdev); |
5037 | pmcraid_disable_interrupts(pinstance, ~0); |
5038 | pmcraid_kill_tasklets(pinstance); |
5039 | pci_set_drvdata(pinstance->pdev, pinstance); |
5040 | pmcraid_unregister_interrupt_handler(pinstance); |
5041 | pci_save_state(pdev); |
5042 | pci_disable_device(pdev); |
5043 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
5044 | |
5045 | return 0; |
5046 | } |
5047 | |
5048 | /** |
5049 | * pmcraid_resume - driver resume entry point PCI power management |
5050 | * @pdev: PCI device structure |
5051 | * |
5052 | * Return Value - 0 in case of success. Error code in case of any failure |
5053 | */ |
5054 | static int pmcraid_resume(struct pci_dev *pdev) |
5055 | { |
5056 | struct pmcraid_instance *pinstance = pci_get_drvdata(pdev); |
5057 | struct Scsi_Host *host = pinstance->host; |
5058 | int rc; |
5059 | int hrrqs; |
5060 | |
5061 | pci_set_power_state(pdev, PCI_D0); |
5062 | pci_enable_wake(pdev, PCI_D0, 0); |
5063 | pci_restore_state(pdev); |
5064 | |
5065 | rc = pci_enable_device(pdev); |
5066 | |
5067 | if (rc) { |
5068 | dev_err(&pdev->dev, "resume: Enable device failed\n"); |
5069 | return rc; |
5070 | } |
5071 | |
5072 | pci_set_master(pdev); |
5073 | |
5074 | if ((sizeof(dma_addr_t) == 4) || |
5075 | pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) |
5076 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
5077 | |
5078 | if (rc == 0) |
5079 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
5080 | |
5081 | if (rc != 0) { |
5082 | dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n"); |
5083 | goto disable_device; |
5084 | } |
5085 | |
5086 | atomic_set(&pinstance->outstanding_cmds, 0); |
5087 | hrrqs = pinstance->num_hrrq; |
5088 | rc = pmcraid_register_interrupt_handler(pinstance); |
5089 | |
5090 | if (rc) { |
5091 | dev_err(&pdev->dev, |
5092 | "resume: couldn't register interrupt handlers\n"); |
5093 | rc = -ENODEV; |
5094 | goto release_host; |
5095 | } |
5096 | |
5097 | pmcraid_init_tasklets(pinstance); |
5098 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
5099 | |
5100 | /* Start with hard reset sequence which brings up IOA to operational |
5101 | * state as well as completes the reset sequence. |
5102 | */ |
5103 | pinstance->ioa_hard_reset = 1; |
5104 | |
5105 | /* Start IOA firmware initialization and bring card to Operational |
5106 | * state. |
5107 | */ |
5108 | if (pmcraid_reset_bringup(pinstance)) { |
5109 | dev_err(&pdev->dev, "couldn't initialize IOA \n"); |
5110 | rc = -ENODEV; |
5111 | goto release_tasklets; |
5112 | } |
5113 | |
5114 | return 0; |
5115 | |
5116 | release_tasklets: |
5117 | pmcraid_kill_tasklets(pinstance); |
5118 | pmcraid_unregister_interrupt_handler(pinstance); |
5119 | |
5120 | release_host: |
5121 | scsi_host_put(host); |
5122 | |
5123 | disable_device: |
5124 | pci_disable_device(pdev); |
5125 | |
5126 | return rc; |
5127 | } |
5128 | |
5129 | #else |
5130 | |
5131 | #define pmcraid_suspend NULL |
5132 | #define pmcraid_resume NULL |
5133 | |
5134 | #endif /* CONFIG_PM */ |
5135 | |
5136 | /** |
5137 | * pmcraid_complete_ioa_reset - Called by either timer or tasklet during |
5138 | * completion of the ioa reset |
5139 | * @cmd: pointer to reset command block |
5140 | */ |
5141 | static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd) |
5142 | { |
5143 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
5144 | unsigned long flags; |
5145 | |
5146 | spin_lock_irqsave(pinstance->host->host_lock, flags); |
5147 | pmcraid_ioa_reset(cmd); |
5148 | spin_unlock_irqrestore(pinstance->host->host_lock, flags); |
5149 | scsi_unblock_requests(pinstance->host); |
5150 | schedule_work(&pinstance->worker_q); |
5151 | } |
5152 | |
5153 | /** |
5154 | * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP |
5155 | * |
5156 | * @cmd: pointer to pmcraid_cmd structure |
5157 | * |
5158 | * Return Value |
5159 | * 0 for success or non-zero for failure cases |
5160 | */ |
5161 | static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd) |
5162 | { |
5163 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
5164 | void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset; |
5165 | |
5166 | pmcraid_reinit_cmdblk(cmd); |
5167 | |
5168 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
5169 | ioarcb->request_type = REQ_TYPE_IOACMD; |
5170 | ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES; |
5171 | ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED; |
5172 | |
5173 | /* If this was called as part of resource table reinitialization due to |
5174 | * lost CCN, it is enough to return the command block back to free pool |
5175 | * as part of set_supported_devs completion function. |
5176 | */ |
5177 | if (cmd->drv_inst->reinit_cfg_table) { |
5178 | cmd->drv_inst->reinit_cfg_table = 0; |
5179 | cmd->release = 1; |
5180 | cmd_done = pmcraid_reinit_cfgtable_done; |
5181 | } |
5182 | |
5183 | /* we will be done with the reset sequence after set supported devices, |
5184 | * setup the done function to return the command block back to free |
5185 | * pool |
5186 | */ |
5187 | pmcraid_send_cmd(cmd, |
5188 | cmd_done, |
5189 | PMCRAID_SET_SUP_DEV_TIMEOUT, |
5190 | pmcraid_timeout_handler); |
5191 | return; |
5192 | } |
5193 | |
5194 | /** |
5195 | * pmcraid_init_res_table - Initialize the resource table |
5196 | * @cmd: pointer to pmcraid command struct |
5197 | * |
5198 | * This function looks through the existing resource table, comparing |
5199 | * it with the config table. This function will take care of old/new |
5200 | * devices and schedule adding/removing them from the mid-layer |
5201 | * as appropriate. |
5202 | * |
5203 | * Return value |
5204 | * None |
5205 | */ |
5206 | static void pmcraid_init_res_table(struct pmcraid_cmd *cmd) |
5207 | { |
5208 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
5209 | struct pmcraid_resource_entry *res, *temp; |
5210 | struct pmcraid_config_table_entry *cfgte; |
5211 | unsigned long lock_flags; |
5212 | int found, rc, i; |
5213 | LIST_HEAD(old_res); |
5214 | |
5215 | if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED) |
5216 | pmcraid_err("IOA requires microcode download\n"); |
5217 | |
5218 | /* resource list is protected by pinstance->resource_lock. |
5219 | * init_res_table can be called from probe (user-thread) or runtime |
5220 | * reset (timer/tasklet) |
5221 | */ |
5222 | spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
5223 | |
5224 | list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) |
5225 | list_move_tail(&res->queue, &old_res); |
5226 | |
5227 | for (i = 0; i < pinstance->cfg_table->num_entries; i++) { |
5228 | cfgte = &pinstance->cfg_table->entries[i]; |
5229 | |
5230 | if (!pmcraid_expose_resource(cfgte)) |
5231 | continue; |
5232 | |
5233 | found = 0; |
5234 | |
5235 | /* If this entry was already detected and initialized */ |
5236 | list_for_each_entry_safe(res, temp, &old_res, queue) { |
5237 | |
5238 | rc = memcmp(&res->cfg_entry.resource_address, |
5239 | &cfgte->resource_address, |
5240 | sizeof(cfgte->resource_address)); |
5241 | if (!rc) { |
5242 | list_move_tail(&res->queue, |
5243 | &pinstance->used_res_q); |
5244 | found = 1; |
5245 | break; |
5246 | } |
5247 | } |
5248 | |
5249 | /* If this is new entry, initialize it and add it the queue */ |
5250 | if (!found) { |
5251 | |
5252 | if (list_empty(&pinstance->free_res_q)) { |
5253 | pmcraid_err("Too many devices attached\n"); |
5254 | break; |
5255 | } |
5256 | |
5257 | found = 1; |
5258 | res = list_entry(pinstance->free_res_q.next, |
5259 | struct pmcraid_resource_entry, queue); |
5260 | |
5261 | res->scsi_dev = NULL; |
5262 | res->change_detected = RES_CHANGE_ADD; |
5263 | res->reset_progress = 0; |
5264 | list_move_tail(&res->queue, &pinstance->used_res_q); |
5265 | } |
5266 | |
5267 | /* copy new configuration table entry details into driver |
5268 | * maintained resource entry |
5269 | */ |
5270 | if (found) { |
5271 | memcpy(&res->cfg_entry, cfgte, |
5272 | sizeof(struct pmcraid_config_table_entry)); |
5273 | pmcraid_info("New res type:%x, vset:%x, addr:%x:\n", |
5274 | res->cfg_entry.resource_type, |
5275 | res->cfg_entry.unique_flags1, |
5276 | le32_to_cpu(res->cfg_entry.resource_address)); |
5277 | } |
5278 | } |
5279 | |
5280 | /* Detect any deleted entries, mark them for deletion from mid-layer */ |
5281 | list_for_each_entry_safe(res, temp, &old_res, queue) { |
5282 | |
5283 | if (res->scsi_dev) { |
5284 | res->change_detected = RES_CHANGE_DEL; |
5285 | res->cfg_entry.resource_handle = |
5286 | PMCRAID_INVALID_RES_HANDLE; |
5287 | list_move_tail(&res->queue, &pinstance->used_res_q); |
5288 | } else { |
5289 | list_move_tail(&res->queue, &pinstance->free_res_q); |
5290 | } |
5291 | } |
5292 | |
5293 | /* release the resource list lock */ |
5294 | spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
5295 | pmcraid_set_supported_devs(cmd); |
5296 | } |
5297 | |
5298 | /** |
5299 | * pmcraid_querycfg - Send a Query IOA Config to the adapter. |
5300 | * @cmd: pointer pmcraid_cmd struct |
5301 | * |
5302 | * This function sends a Query IOA Configuration command to the adapter to |
5303 | * retrieve the IOA configuration table. |
5304 | * |
5305 | * Return value: |
5306 | * none |
5307 | */ |
5308 | static void pmcraid_querycfg(struct pmcraid_cmd *cmd) |
5309 | { |
5310 | struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
5311 | struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
5312 | struct pmcraid_instance *pinstance = cmd->drv_inst; |
5313 | int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table)); |
5314 | |
5315 | ioarcb->request_type = REQ_TYPE_IOACMD; |
5316 | ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
5317 | |
5318 | ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG; |
5319 | |
5320 | /* firmware requires 4-byte length field, specified in B.E format */ |
5321 | memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size)); |
5322 | |
5323 | /* Since entire config table can be described by single IOADL, it can |
5324 | * be part of IOARCB itself |
5325 | */ |
5326 | ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
5327 | offsetof(struct pmcraid_ioarcb, |
5328 | add_data.u.ioadl[0])); |
5329 | ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
5330 | ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
5331 | |
5332 | ioarcb->request_flags0 |= NO_LINK_DESCS; |
5333 | ioarcb->data_transfer_length = |
5334 | cpu_to_le32(sizeof(struct pmcraid_config_table)); |
5335 | |
5336 | ioadl = &(ioarcb->add_data.u.ioadl[0]); |
5337 | ioadl->flags = IOADL_FLAGS_LAST_DESC; |
5338 | ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr); |
5339 | ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table)); |
5340 | |
5341 | pmcraid_send_cmd(cmd, pmcraid_init_res_table, |
5342 | PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler); |
5343 | } |
5344 | |
5345 | |
5346 | /** |
5347 | * pmcraid_probe - PCI probe entry pointer for PMC MaxRaid controller driver |
5348 | * @pdev: pointer to pci device structure |
5349 | * @dev_id: pointer to device ids structure |
5350 | * |
5351 | * Return Value |
5352 | * returns 0 if the device is claimed and successfully configured. |
5353 | * returns non-zero error code in case of any failure |
5354 | */ |
5355 | static int __devinit pmcraid_probe( |
5356 | struct pci_dev *pdev, |
5357 | const struct pci_device_id *dev_id |
5358 | ) |
5359 | { |
5360 | struct pmcraid_instance *pinstance; |
5361 | struct Scsi_Host *host; |
5362 | void __iomem *mapped_pci_addr; |
5363 | int rc = PCIBIOS_SUCCESSFUL; |
5364 | |
5365 | if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) { |
5366 | pmcraid_err |
5367 | ("maximum number(%d) of supported adapters reached\n", |
5368 | atomic_read(&pmcraid_adapter_count)); |
5369 | return -ENOMEM; |
5370 | } |
5371 | |
5372 | atomic_inc(&pmcraid_adapter_count); |
5373 | rc = pci_enable_device(pdev); |
5374 | |
5375 | if (rc) { |
5376 | dev_err(&pdev->dev, "Cannot enable adapter\n"); |
5377 | atomic_dec(&pmcraid_adapter_count); |
5378 | return rc; |
5379 | } |
5380 | |
5381 | dev_info(&pdev->dev, |
5382 | "Found new IOA(%x:%x), Total IOA count: %d\n", |
5383 | pdev->vendor, pdev->device, |
5384 | atomic_read(&pmcraid_adapter_count)); |
5385 | |
5386 | rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME); |
5387 | |
5388 | if (rc < 0) { |
5389 | dev_err(&pdev->dev, |
5390 | "Couldn't register memory range of registers\n"); |
5391 | goto out_disable_device; |
5392 | } |
5393 | |
5394 | mapped_pci_addr = pci_iomap(pdev, 0, 0); |
5395 | |
5396 | if (!mapped_pci_addr) { |
5397 | dev_err(&pdev->dev, "Couldn't map PCI registers memory\n"); |
5398 | rc = -ENOMEM; |
5399 | goto out_release_regions; |
5400 | } |
5401 | |
5402 | pci_set_master(pdev); |
5403 | |
5404 | /* Firmware requires the system bus address of IOARCB to be within |
5405 | * 32-bit addressable range though it has 64-bit IOARRIN register. |
5406 | * However, firmware supports 64-bit streaming DMA buffers, whereas |
5407 | * coherent buffers are to be 32-bit. Since pci_alloc_consistent always |
5408 | * returns memory within 4GB (if not, change this logic), coherent |
5409 | * buffers are within firmware acceptible address ranges. |
5410 | */ |
5411 | if ((sizeof(dma_addr_t) == 4) || |
5412 | pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) |
5413 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
5414 | |
5415 | /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32 |
5416 | * bit mask for pci_alloc_consistent to return addresses within 4GB |
5417 | */ |
5418 | if (rc == 0) |
5419 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
5420 | |
5421 | if (rc != 0) { |
5422 | dev_err(&pdev->dev, "Failed to set PCI DMA mask\n"); |
5423 | goto cleanup_nomem; |
5424 | } |
5425 | |
5426 | host = scsi_host_alloc(&pmcraid_host_template, |
5427 | sizeof(struct pmcraid_instance)); |
5428 | |
5429 | if (!host) { |
5430 | dev_err(&pdev->dev, "scsi_host_alloc failed!\n"); |
5431 | rc = -ENOMEM; |
5432 | goto cleanup_nomem; |
5433 | } |
5434 | |
5435 | host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS; |
5436 | host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET; |
5437 | host->unique_id = host->host_no; |
5438 | host->max_channel = PMCRAID_MAX_BUS_TO_SCAN; |
5439 | host->max_cmd_len = PMCRAID_MAX_CDB_LEN; |
5440 | |
5441 | /* zero out entire instance structure */ |
5442 | pinstance = (struct pmcraid_instance *)host->hostdata; |
5443 | memset(pinstance, 0, sizeof(*pinstance)); |
5444 | |
5445 | pinstance->chip_cfg = |
5446 | (struct pmcraid_chip_details *)(dev_id->driver_data); |
5447 | |
5448 | rc = pmcraid_init_instance(pdev, host, mapped_pci_addr); |
5449 | |
5450 | if (rc < 0) { |
5451 | dev_err(&pdev->dev, "failed to initialize adapter instance\n"); |
5452 | goto out_scsi_host_put; |
5453 | } |
5454 | |
5455 | pci_set_drvdata(pdev, pinstance); |
5456 | |
5457 | /* Save PCI config-space for use following the reset */ |
5458 | rc = pci_save_state(pinstance->pdev); |
5459 | |
5460 | if (rc != 0) { |
5461 | dev_err(&pdev->dev, "Failed to save PCI config space\n"); |
5462 | goto out_scsi_host_put; |
5463 | } |
5464 | |
5465 | pmcraid_disable_interrupts(pinstance, ~0); |
5466 | |
5467 | rc = pmcraid_register_interrupt_handler(pinstance); |
5468 | |
5469 | if (rc) { |
5470 | dev_err(&pdev->dev, "couldn't register interrupt handler\n"); |
5471 | goto out_scsi_host_put; |
5472 | } |
5473 | |
5474 | pmcraid_init_tasklets(pinstance); |
5475 | |
5476 | /* allocate verious buffers used by LLD.*/ |
5477 | rc = pmcraid_init_buffers(pinstance); |
5478 | |
5479 | if (rc) { |
5480 | pmcraid_err("couldn't allocate memory blocks\n"); |
5481 | goto out_unregister_isr; |
5482 | } |
5483 | |
5484 | /* check the reset type required */ |
5485 | pmcraid_reset_type(pinstance); |
5486 | |
5487 | pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
5488 | |
5489 | /* Start IOA firmware initialization and bring card to Operational |
5490 | * state. |
5491 | */ |
5492 | pmcraid_info("starting IOA initialization sequence\n"); |
5493 | if (pmcraid_reset_bringup(pinstance)) { |
5494 | dev_err(&pdev->dev, "couldn't initialize IOA \n"); |
5495 | rc = 1; |
5496 | goto out_release_bufs; |
5497 | } |
5498 | |
5499 | /* Add adapter instance into mid-layer list */ |
5500 | rc = scsi_add_host(pinstance->host, &pdev->dev); |
5501 | if (rc != 0) { |
5502 | pmcraid_err("couldn't add host into mid-layer: %d\n", rc); |
5503 | goto out_release_bufs; |
5504 | } |
5505 | |
5506 | scsi_scan_host(pinstance->host); |
5507 | |
5508 | rc = pmcraid_setup_chrdev(pinstance); |
5509 | |
5510 | if (rc != 0) { |
5511 | pmcraid_err("couldn't create mgmt interface, error: %x\n", |
5512 | rc); |
5513 | goto out_remove_host; |
5514 | } |
5515 | |
5516 | /* Schedule worker thread to handle CCN and take care of adding and |
5517 | * removing devices to OS |
5518 | */ |
5519 | atomic_set(&pinstance->expose_resources, 1); |
5520 | schedule_work(&pinstance->worker_q); |
5521 | return rc; |
5522 | |
5523 | out_remove_host: |
5524 | scsi_remove_host(host); |
5525 | |
5526 | out_release_bufs: |
5527 | pmcraid_release_buffers(pinstance); |
5528 | |
5529 | out_unregister_isr: |
5530 | pmcraid_kill_tasklets(pinstance); |
5531 | pmcraid_unregister_interrupt_handler(pinstance); |
5532 | |
5533 | out_scsi_host_put: |
5534 | scsi_host_put(host); |
5535 | |
5536 | cleanup_nomem: |
5537 | iounmap(mapped_pci_addr); |
5538 | |
5539 | out_release_regions: |
5540 | pci_release_regions(pdev); |
5541 | |
5542 | out_disable_device: |
5543 | atomic_dec(&pmcraid_adapter_count); |
5544 | pci_set_drvdata(pdev, NULL); |
5545 | pci_disable_device(pdev); |
5546 | return -ENODEV; |
5547 | } |
5548 | |
5549 | /* |
5550 | * PCI driver structure of pcmraid driver |
5551 | */ |
5552 | static struct pci_driver pmcraid_driver = { |
5553 | .name = PMCRAID_DRIVER_NAME, |
5554 | .id_table = pmcraid_pci_table, |
5555 | .probe = pmcraid_probe, |
5556 | .remove = pmcraid_remove, |
5557 | .suspend = pmcraid_suspend, |
5558 | .resume = pmcraid_resume, |
5559 | .shutdown = pmcraid_shutdown |
5560 | }; |
5561 | |
5562 | /** |
5563 | * pmcraid_init - module load entry point |
5564 | */ |
5565 | static int __init pmcraid_init(void) |
5566 | { |
5567 | dev_t dev; |
5568 | int error; |
5569 | |
5570 | pmcraid_info("%s Device Driver version: %s %s\n", |
5571 | PMCRAID_DRIVER_NAME, |
5572 | PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE); |
5573 | |
5574 | error = alloc_chrdev_region(&dev, 0, |
5575 | PMCRAID_MAX_ADAPTERS, |
5576 | PMCRAID_DEVFILE); |
5577 | |
5578 | if (error) { |
5579 | pmcraid_err("failed to get a major number for adapters\n"); |
5580 | goto out_init; |
5581 | } |
5582 | |
5583 | pmcraid_major = MAJOR(dev); |
5584 | pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE); |
5585 | |
5586 | if (IS_ERR(pmcraid_class)) { |
5587 | error = PTR_ERR(pmcraid_class); |
5588 | pmcraid_err("failed to register with with sysfs, error = %x\n", |
5589 | error); |
5590 | goto out_unreg_chrdev; |
5591 | } |
5592 | |
5593 | error = pmcraid_netlink_init(); |
5594 | |
5595 | if (error) |
5596 | goto out_unreg_chrdev; |
5597 | |
5598 | error = pci_register_driver(&pmcraid_driver); |
5599 | |
5600 | if (error == 0) |
5601 | goto out_init; |
5602 | |
5603 | pmcraid_err("failed to register pmcraid driver, error = %x\n", |
5604 | error); |
5605 | class_destroy(pmcraid_class); |
5606 | pmcraid_netlink_release(); |
5607 | |
5608 | out_unreg_chrdev: |
5609 | unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS); |
5610 | |
5611 | out_init: |
5612 | return error; |
5613 | } |
5614 | |
5615 | /** |
5616 | * pmcraid_exit - module unload entry point |
5617 | */ |
5618 | static void __exit pmcraid_exit(void) |
5619 | { |
5620 | pmcraid_netlink_release(); |
5621 | class_destroy(pmcraid_class); |
5622 | unregister_chrdev_region(MKDEV(pmcraid_major, 0), |
5623 | PMCRAID_MAX_ADAPTERS); |
5624 | pci_unregister_driver(&pmcraid_driver); |
5625 | } |
5626 | |
5627 | module_init(pmcraid_init); |
5628 | module_exit(pmcraid_exit); |
5629 |
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-3.3
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jz-3.6-rc2-pwm
jz-3.9
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jz-3.9-rc8
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