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1 | /* |
2 | * PS3 BD/DVD/CD-ROM Storage Driver |
3 | * |
4 | * Copyright (C) 2007 Sony Computer Entertainment Inc. |
5 | * Copyright 2007 Sony Corp. |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it |
8 | * under the terms of the GNU General Public License as published |
9 | * by the Free Software Foundation; version 2 of the License. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, but |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | * General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; if not, write to the Free Software Foundation, Inc., |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
19 | */ |
20 | |
21 | #include <linux/cdrom.h> |
22 | #include <linux/highmem.h> |
23 | #include <linux/slab.h> |
24 | |
25 | #include <scsi/scsi.h> |
26 | #include <scsi/scsi_cmnd.h> |
27 | #include <scsi/scsi_dbg.h> |
28 | #include <scsi/scsi_device.h> |
29 | #include <scsi/scsi_host.h> |
30 | #include <scsi/scsi_eh.h> |
31 | |
32 | #include <asm/lv1call.h> |
33 | #include <asm/ps3stor.h> |
34 | |
35 | |
36 | #define DEVICE_NAME "ps3rom" |
37 | |
38 | #define BOUNCE_SIZE (64*1024) |
39 | |
40 | #define PS3ROM_MAX_SECTORS (BOUNCE_SIZE >> 9) |
41 | |
42 | |
43 | struct ps3rom_private { |
44 | struct ps3_storage_device *dev; |
45 | struct scsi_cmnd *curr_cmd; |
46 | }; |
47 | |
48 | |
49 | #define LV1_STORAGE_SEND_ATAPI_COMMAND (1) |
50 | |
51 | struct lv1_atapi_cmnd_block { |
52 | u8 pkt[32]; /* packet command block */ |
53 | u32 pktlen; /* should be 12 for ATAPI 8020 */ |
54 | u32 blocks; |
55 | u32 block_size; |
56 | u32 proto; /* transfer mode */ |
57 | u32 in_out; /* transfer direction */ |
58 | u64 buffer; /* parameter except command block */ |
59 | u32 arglen; /* length above */ |
60 | }; |
61 | |
62 | enum lv1_atapi_proto { |
63 | NON_DATA_PROTO = 0, |
64 | PIO_DATA_IN_PROTO = 1, |
65 | PIO_DATA_OUT_PROTO = 2, |
66 | DMA_PROTO = 3 |
67 | }; |
68 | |
69 | enum lv1_atapi_in_out { |
70 | DIR_WRITE = 0, /* memory -> device */ |
71 | DIR_READ = 1 /* device -> memory */ |
72 | }; |
73 | |
74 | |
75 | static int ps3rom_slave_configure(struct scsi_device *scsi_dev) |
76 | { |
77 | struct ps3rom_private *priv = shost_priv(scsi_dev->host); |
78 | struct ps3_storage_device *dev = priv->dev; |
79 | |
80 | dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %u, channel %u\n", __func__, |
81 | __LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel); |
82 | |
83 | /* |
84 | * ATAPI SFF8020 devices use MODE_SENSE_10, |
85 | * so we can prohibit MODE_SENSE_6 |
86 | */ |
87 | scsi_dev->use_10_for_ms = 1; |
88 | |
89 | /* we don't support {READ,WRITE}_6 */ |
90 | scsi_dev->use_10_for_rw = 1; |
91 | |
92 | return 0; |
93 | } |
94 | |
95 | static int ps3rom_atapi_request(struct ps3_storage_device *dev, |
96 | struct scsi_cmnd *cmd) |
97 | { |
98 | struct lv1_atapi_cmnd_block atapi_cmnd; |
99 | unsigned char opcode = cmd->cmnd[0]; |
100 | int res; |
101 | u64 lpar; |
102 | |
103 | dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__, |
104 | __LINE__, opcode); |
105 | |
106 | memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block)); |
107 | memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12); |
108 | atapi_cmnd.pktlen = 12; |
109 | atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */ |
110 | atapi_cmnd.blocks = atapi_cmnd.arglen = scsi_bufflen(cmd); |
111 | atapi_cmnd.buffer = dev->bounce_lpar; |
112 | |
113 | switch (cmd->sc_data_direction) { |
114 | case DMA_FROM_DEVICE: |
115 | if (scsi_bufflen(cmd) >= CD_FRAMESIZE) |
116 | atapi_cmnd.proto = DMA_PROTO; |
117 | else |
118 | atapi_cmnd.proto = PIO_DATA_IN_PROTO; |
119 | atapi_cmnd.in_out = DIR_READ; |
120 | break; |
121 | |
122 | case DMA_TO_DEVICE: |
123 | if (scsi_bufflen(cmd) >= CD_FRAMESIZE) |
124 | atapi_cmnd.proto = DMA_PROTO; |
125 | else |
126 | atapi_cmnd.proto = PIO_DATA_OUT_PROTO; |
127 | atapi_cmnd.in_out = DIR_WRITE; |
128 | scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size); |
129 | break; |
130 | |
131 | default: |
132 | atapi_cmnd.proto = NON_DATA_PROTO; |
133 | break; |
134 | } |
135 | |
136 | lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd)); |
137 | res = lv1_storage_send_device_command(dev->sbd.dev_id, |
138 | LV1_STORAGE_SEND_ATAPI_COMMAND, |
139 | lpar, sizeof(atapi_cmnd), |
140 | atapi_cmnd.buffer, |
141 | atapi_cmnd.arglen, &dev->tag); |
142 | if (res == LV1_DENIED_BY_POLICY) { |
143 | dev_dbg(&dev->sbd.core, |
144 | "%s:%u: ATAPI command 0x%02x denied by policy\n", |
145 | __func__, __LINE__, opcode); |
146 | return DID_ERROR << 16; |
147 | } |
148 | |
149 | if (res) { |
150 | dev_err(&dev->sbd.core, |
151 | "%s:%u: ATAPI command 0x%02x failed %d\n", __func__, |
152 | __LINE__, opcode, res); |
153 | return DID_ERROR << 16; |
154 | } |
155 | |
156 | return 0; |
157 | } |
158 | |
159 | static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd) |
160 | { |
161 | return cmd->cmnd[2] << 24 | cmd->cmnd[3] << 16 | cmd->cmnd[4] << 8 | |
162 | cmd->cmnd[5]; |
163 | } |
164 | |
165 | static inline unsigned int srb10_len(const struct scsi_cmnd *cmd) |
166 | { |
167 | return cmd->cmnd[7] << 8 | cmd->cmnd[8]; |
168 | } |
169 | |
170 | static int ps3rom_read_request(struct ps3_storage_device *dev, |
171 | struct scsi_cmnd *cmd, u32 start_sector, |
172 | u32 sectors) |
173 | { |
174 | int res; |
175 | |
176 | dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n", |
177 | __func__, __LINE__, sectors, start_sector); |
178 | |
179 | res = lv1_storage_read(dev->sbd.dev_id, |
180 | dev->regions[dev->region_idx].id, start_sector, |
181 | sectors, 0, dev->bounce_lpar, &dev->tag); |
182 | if (res) { |
183 | dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__, |
184 | __LINE__, res); |
185 | return DID_ERROR << 16; |
186 | } |
187 | |
188 | return 0; |
189 | } |
190 | |
191 | static int ps3rom_write_request(struct ps3_storage_device *dev, |
192 | struct scsi_cmnd *cmd, u32 start_sector, |
193 | u32 sectors) |
194 | { |
195 | int res; |
196 | |
197 | dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n", |
198 | __func__, __LINE__, sectors, start_sector); |
199 | |
200 | scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size); |
201 | |
202 | res = lv1_storage_write(dev->sbd.dev_id, |
203 | dev->regions[dev->region_idx].id, start_sector, |
204 | sectors, 0, dev->bounce_lpar, &dev->tag); |
205 | if (res) { |
206 | dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__, |
207 | __LINE__, res); |
208 | return DID_ERROR << 16; |
209 | } |
210 | |
211 | return 0; |
212 | } |
213 | |
214 | static int ps3rom_queuecommand(struct scsi_cmnd *cmd, |
215 | void (*done)(struct scsi_cmnd *)) |
216 | { |
217 | struct ps3rom_private *priv = shost_priv(cmd->device->host); |
218 | struct ps3_storage_device *dev = priv->dev; |
219 | unsigned char opcode; |
220 | int res; |
221 | |
222 | #ifdef DEBUG |
223 | scsi_print_command(cmd); |
224 | #endif |
225 | |
226 | priv->curr_cmd = cmd; |
227 | cmd->scsi_done = done; |
228 | |
229 | opcode = cmd->cmnd[0]; |
230 | /* |
231 | * While we can submit READ/WRITE SCSI commands as ATAPI commands, |
232 | * it's recommended for various reasons (performance, error handling, |
233 | * ...) to use lv1_storage_{read,write}() instead |
234 | */ |
235 | switch (opcode) { |
236 | case READ_10: |
237 | res = ps3rom_read_request(dev, cmd, srb10_lba(cmd), |
238 | srb10_len(cmd)); |
239 | break; |
240 | |
241 | case WRITE_10: |
242 | res = ps3rom_write_request(dev, cmd, srb10_lba(cmd), |
243 | srb10_len(cmd)); |
244 | break; |
245 | |
246 | default: |
247 | res = ps3rom_atapi_request(dev, cmd); |
248 | break; |
249 | } |
250 | |
251 | if (res) { |
252 | memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
253 | cmd->result = res; |
254 | cmd->sense_buffer[0] = 0x70; |
255 | cmd->sense_buffer[2] = ILLEGAL_REQUEST; |
256 | priv->curr_cmd = NULL; |
257 | cmd->scsi_done(cmd); |
258 | } |
259 | |
260 | return 0; |
261 | } |
262 | |
263 | static int decode_lv1_status(u64 status, unsigned char *sense_key, |
264 | unsigned char *asc, unsigned char *ascq) |
265 | { |
266 | if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION) |
267 | return -1; |
268 | |
269 | *sense_key = (status >> 16) & 0xff; |
270 | *asc = (status >> 8) & 0xff; |
271 | *ascq = status & 0xff; |
272 | return 0; |
273 | } |
274 | |
275 | static irqreturn_t ps3rom_interrupt(int irq, void *data) |
276 | { |
277 | struct ps3_storage_device *dev = data; |
278 | struct Scsi_Host *host; |
279 | struct ps3rom_private *priv; |
280 | struct scsi_cmnd *cmd; |
281 | int res; |
282 | u64 tag, status; |
283 | unsigned char sense_key, asc, ascq; |
284 | |
285 | res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status); |
286 | /* |
287 | * status = -1 may mean that ATAPI transport completed OK, but |
288 | * ATAPI command itself resulted CHECK CONDITION |
289 | * so, upper layer should issue REQUEST_SENSE to check the sense data |
290 | */ |
291 | |
292 | if (tag != dev->tag) |
293 | dev_err(&dev->sbd.core, |
294 | "%s:%u: tag mismatch, got %llx, expected %llx\n", |
295 | __func__, __LINE__, tag, dev->tag); |
296 | |
297 | if (res) { |
298 | dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n", |
299 | __func__, __LINE__, res, status); |
300 | return IRQ_HANDLED; |
301 | } |
302 | |
303 | host = ps3_system_bus_get_drvdata(&dev->sbd); |
304 | priv = shost_priv(host); |
305 | cmd = priv->curr_cmd; |
306 | |
307 | if (!status) { |
308 | /* OK, completed */ |
309 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) { |
310 | int len; |
311 | |
312 | len = scsi_sg_copy_from_buffer(cmd, |
313 | dev->bounce_buf, |
314 | dev->bounce_size); |
315 | |
316 | scsi_set_resid(cmd, scsi_bufflen(cmd) - len); |
317 | } |
318 | cmd->result = DID_OK << 16; |
319 | goto done; |
320 | } |
321 | |
322 | if (cmd->cmnd[0] == REQUEST_SENSE) { |
323 | /* SCSI spec says request sense should never get error */ |
324 | dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n", |
325 | __func__, __LINE__); |
326 | cmd->result = DID_ERROR << 16 | SAM_STAT_CHECK_CONDITION; |
327 | goto done; |
328 | } |
329 | |
330 | if (decode_lv1_status(status, &sense_key, &asc, &ascq)) { |
331 | cmd->result = DID_ERROR << 16; |
332 | goto done; |
333 | } |
334 | |
335 | scsi_build_sense_buffer(0, cmd->sense_buffer, sense_key, asc, ascq); |
336 | cmd->result = SAM_STAT_CHECK_CONDITION; |
337 | |
338 | done: |
339 | priv->curr_cmd = NULL; |
340 | cmd->scsi_done(cmd); |
341 | return IRQ_HANDLED; |
342 | } |
343 | |
344 | static struct scsi_host_template ps3rom_host_template = { |
345 | .name = DEVICE_NAME, |
346 | .slave_configure = ps3rom_slave_configure, |
347 | .queuecommand = ps3rom_queuecommand, |
348 | .can_queue = 1, |
349 | .this_id = 7, |
350 | .sg_tablesize = SG_ALL, |
351 | .cmd_per_lun = 1, |
352 | .emulated = 1, /* only sg driver uses this */ |
353 | .max_sectors = PS3ROM_MAX_SECTORS, |
354 | .use_clustering = ENABLE_CLUSTERING, |
355 | .module = THIS_MODULE, |
356 | }; |
357 | |
358 | |
359 | static int __devinit ps3rom_probe(struct ps3_system_bus_device *_dev) |
360 | { |
361 | struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); |
362 | int error; |
363 | struct Scsi_Host *host; |
364 | struct ps3rom_private *priv; |
365 | |
366 | if (dev->blk_size != CD_FRAMESIZE) { |
367 | dev_err(&dev->sbd.core, |
368 | "%s:%u: cannot handle block size %llu\n", __func__, |
369 | __LINE__, dev->blk_size); |
370 | return -EINVAL; |
371 | } |
372 | |
373 | dev->bounce_size = BOUNCE_SIZE; |
374 | dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA); |
375 | if (!dev->bounce_buf) |
376 | return -ENOMEM; |
377 | |
378 | error = ps3stor_setup(dev, ps3rom_interrupt); |
379 | if (error) |
380 | goto fail_free_bounce; |
381 | |
382 | host = scsi_host_alloc(&ps3rom_host_template, |
383 | sizeof(struct ps3rom_private)); |
384 | if (!host) { |
385 | dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n", |
386 | __func__, __LINE__); |
387 | goto fail_teardown; |
388 | } |
389 | |
390 | priv = shost_priv(host); |
391 | ps3_system_bus_set_drvdata(&dev->sbd, host); |
392 | priv->dev = dev; |
393 | |
394 | /* One device/LUN per SCSI bus */ |
395 | host->max_id = 1; |
396 | host->max_lun = 1; |
397 | |
398 | error = scsi_add_host(host, &dev->sbd.core); |
399 | if (error) { |
400 | dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n", |
401 | __func__, __LINE__, error); |
402 | error = -ENODEV; |
403 | goto fail_host_put; |
404 | } |
405 | |
406 | scsi_scan_host(host); |
407 | return 0; |
408 | |
409 | fail_host_put: |
410 | scsi_host_put(host); |
411 | ps3_system_bus_set_drvdata(&dev->sbd, NULL); |
412 | fail_teardown: |
413 | ps3stor_teardown(dev); |
414 | fail_free_bounce: |
415 | kfree(dev->bounce_buf); |
416 | return error; |
417 | } |
418 | |
419 | static int ps3rom_remove(struct ps3_system_bus_device *_dev) |
420 | { |
421 | struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); |
422 | struct Scsi_Host *host = ps3_system_bus_get_drvdata(&dev->sbd); |
423 | |
424 | scsi_remove_host(host); |
425 | ps3stor_teardown(dev); |
426 | scsi_host_put(host); |
427 | ps3_system_bus_set_drvdata(&dev->sbd, NULL); |
428 | kfree(dev->bounce_buf); |
429 | return 0; |
430 | } |
431 | |
432 | static struct ps3_system_bus_driver ps3rom = { |
433 | .match_id = PS3_MATCH_ID_STOR_ROM, |
434 | .core.name = DEVICE_NAME, |
435 | .core.owner = THIS_MODULE, |
436 | .probe = ps3rom_probe, |
437 | .remove = ps3rom_remove |
438 | }; |
439 | |
440 | |
441 | static int __init ps3rom_init(void) |
442 | { |
443 | return ps3_system_bus_driver_register(&ps3rom); |
444 | } |
445 | |
446 | static void __exit ps3rom_exit(void) |
447 | { |
448 | ps3_system_bus_driver_unregister(&ps3rom); |
449 | } |
450 | |
451 | module_init(ps3rom_init); |
452 | module_exit(ps3rom_exit); |
453 | |
454 | MODULE_LICENSE("GPL"); |
455 | MODULE_DESCRIPTION("PS3 BD/DVD/CD-ROM Storage Driver"); |
456 | MODULE_AUTHOR("Sony Corporation"); |
457 | MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM); |
458 |
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