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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * PS3 BD/DVD/CD-ROM Storage Driver
4 *
5 * Copyright (C) 2007 Sony Computer Entertainment Inc.
6 * Copyright 2007 Sony Corp.
7 */
8
9#include <linux/cdrom.h>
10#include <linux/highmem.h>
11#include <linux/module.h>
12#include <linux/slab.h>
13
14#include <scsi/scsi.h>
15#include <scsi/scsi_cmnd.h>
16#include <scsi/scsi_dbg.h>
17#include <scsi/scsi_device.h>
18#include <scsi/scsi_host.h>
19#include <scsi/scsi_eh.h>
20
21#include <asm/lv1call.h>
22#include <asm/ps3stor.h>
23
24
25#define DEVICE_NAME "ps3rom"
26
27#define BOUNCE_SIZE (64*1024)
28
29#define PS3ROM_MAX_SECTORS (BOUNCE_SIZE >> 9)
30
31
32struct ps3rom_private {
33 struct ps3_storage_device *dev;
34 struct scsi_cmnd *curr_cmd;
35};
36
37
38#define LV1_STORAGE_SEND_ATAPI_COMMAND (1)
39
40struct lv1_atapi_cmnd_block {
41 u8 pkt[32]; /* packet command block */
42 u32 pktlen; /* should be 12 for ATAPI 8020 */
43 u32 blocks;
44 u32 block_size;
45 u32 proto; /* transfer mode */
46 u32 in_out; /* transfer direction */
47 u64 buffer; /* parameter except command block */
48 u32 arglen; /* length above */
49};
50
51enum lv1_atapi_proto {
52 NON_DATA_PROTO = 0,
53 PIO_DATA_IN_PROTO = 1,
54 PIO_DATA_OUT_PROTO = 2,
55 DMA_PROTO = 3
56};
57
58enum lv1_atapi_in_out {
59 DIR_WRITE = 0, /* memory -> device */
60 DIR_READ = 1 /* device -> memory */
61};
62
63
64static int ps3rom_sdev_configure(struct scsi_device *scsi_dev,
65 struct queue_limits *lim)
66{
67 struct ps3rom_private *priv = shost_priv(scsi_dev->host);
68 struct ps3_storage_device *dev = priv->dev;
69
70 dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %llu, channel %u\n", __func__,
71 __LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel);
72
73 /*
74 * ATAPI SFF8020 devices use MODE_SENSE_10,
75 * so we can prohibit MODE_SENSE_6
76 */
77 scsi_dev->use_10_for_ms = 1;
78
79 /* we don't support {READ,WRITE}_6 */
80 scsi_dev->use_10_for_rw = 1;
81
82 return 0;
83}
84
85static int ps3rom_atapi_request(struct ps3_storage_device *dev,
86 struct scsi_cmnd *cmd)
87{
88 struct lv1_atapi_cmnd_block atapi_cmnd;
89 unsigned char opcode = cmd->cmnd[0];
90 int res;
91 u64 lpar;
92
93 dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__,
94 __LINE__, opcode);
95
96 memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block));
97 memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12);
98 atapi_cmnd.pktlen = 12;
99 atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */
100 atapi_cmnd.blocks = atapi_cmnd.arglen = scsi_bufflen(cmd);
101 atapi_cmnd.buffer = dev->bounce_lpar;
102
103 switch (cmd->sc_data_direction) {
104 case DMA_FROM_DEVICE:
105 if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
106 atapi_cmnd.proto = DMA_PROTO;
107 else
108 atapi_cmnd.proto = PIO_DATA_IN_PROTO;
109 atapi_cmnd.in_out = DIR_READ;
110 break;
111
112 case DMA_TO_DEVICE:
113 if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
114 atapi_cmnd.proto = DMA_PROTO;
115 else
116 atapi_cmnd.proto = PIO_DATA_OUT_PROTO;
117 atapi_cmnd.in_out = DIR_WRITE;
118 scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
119 break;
120
121 default:
122 atapi_cmnd.proto = NON_DATA_PROTO;
123 break;
124 }
125
126 lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd));
127 res = lv1_storage_send_device_command(dev->sbd.dev_id,
128 LV1_STORAGE_SEND_ATAPI_COMMAND,
129 lpar, sizeof(atapi_cmnd),
130 atapi_cmnd.buffer,
131 atapi_cmnd.arglen, &dev->tag);
132 if (res == LV1_DENIED_BY_POLICY) {
133 dev_dbg(&dev->sbd.core,
134 "%s:%u: ATAPI command 0x%02x denied by policy\n",
135 __func__, __LINE__, opcode);
136 return DID_ERROR << 16;
137 }
138
139 if (res) {
140 dev_err(&dev->sbd.core,
141 "%s:%u: ATAPI command 0x%02x failed %d\n", __func__,
142 __LINE__, opcode, res);
143 return DID_ERROR << 16;
144 }
145
146 return 0;
147}
148
149static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd)
150{
151 return cmd->cmnd[2] << 24 | cmd->cmnd[3] << 16 | cmd->cmnd[4] << 8 |
152 cmd->cmnd[5];
153}
154
155static inline unsigned int srb10_len(const struct scsi_cmnd *cmd)
156{
157 return cmd->cmnd[7] << 8 | cmd->cmnd[8];
158}
159
160static int ps3rom_read_request(struct ps3_storage_device *dev,
161 struct scsi_cmnd *cmd, u32 start_sector,
162 u32 sectors)
163{
164 int res;
165
166 dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n",
167 __func__, __LINE__, sectors, start_sector);
168
169 res = lv1_storage_read(dev->sbd.dev_id,
170 dev->regions[dev->region_idx].id, start_sector,
171 sectors, 0, dev->bounce_lpar, &dev->tag);
172 if (res) {
173 dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__,
174 __LINE__, res);
175 return DID_ERROR << 16;
176 }
177
178 return 0;
179}
180
181static int ps3rom_write_request(struct ps3_storage_device *dev,
182 struct scsi_cmnd *cmd, u32 start_sector,
183 u32 sectors)
184{
185 int res;
186
187 dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n",
188 __func__, __LINE__, sectors, start_sector);
189
190 scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
191
192 res = lv1_storage_write(dev->sbd.dev_id,
193 dev->regions[dev->region_idx].id, start_sector,
194 sectors, 0, dev->bounce_lpar, &dev->tag);
195 if (res) {
196 dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__,
197 __LINE__, res);
198 return DID_ERROR << 16;
199 }
200
201 return 0;
202}
203
204static enum scsi_qc_status ps3rom_queuecommand_lck(struct scsi_cmnd *cmd)
205{
206 struct ps3rom_private *priv = shost_priv(cmd->device->host);
207 struct ps3_storage_device *dev = priv->dev;
208 unsigned char opcode;
209 int res;
210
211 priv->curr_cmd = cmd;
212
213 opcode = cmd->cmnd[0];
214 /*
215 * While we can submit READ/WRITE SCSI commands as ATAPI commands,
216 * it's recommended for various reasons (performance, error handling,
217 * ...) to use lv1_storage_{read,write}() instead
218 */
219 switch (opcode) {
220 case READ_10:
221 res = ps3rom_read_request(dev, cmd, srb10_lba(cmd),
222 srb10_len(cmd));
223 break;
224
225 case WRITE_10:
226 res = ps3rom_write_request(dev, cmd, srb10_lba(cmd),
227 srb10_len(cmd));
228 break;
229
230 default:
231 res = ps3rom_atapi_request(dev, cmd);
232 break;
233 }
234
235 if (res) {
236 scsi_build_sense(cmd, 0, ILLEGAL_REQUEST, 0, 0);
237 cmd->result = res;
238 priv->curr_cmd = NULL;
239 scsi_done(cmd);
240 }
241
242 return 0;
243}
244
245static DEF_SCSI_QCMD(ps3rom_queuecommand)
246
247static int decode_lv1_status(u64 status, unsigned char *sense_key,
248 unsigned char *asc, unsigned char *ascq)
249{
250 if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION)
251 return -1;
252
253 *sense_key = (status >> 16) & 0xff;
254 *asc = (status >> 8) & 0xff;
255 *ascq = status & 0xff;
256 return 0;
257}
258
259static irqreturn_t ps3rom_interrupt(int irq, void *data)
260{
261 struct ps3_storage_device *dev = data;
262 struct Scsi_Host *host;
263 struct ps3rom_private *priv;
264 struct scsi_cmnd *cmd;
265 int res;
266 u64 tag, status;
267 unsigned char sense_key, asc, ascq;
268
269 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
270 /*
271 * status = -1 may mean that ATAPI transport completed OK, but
272 * ATAPI command itself resulted CHECK CONDITION
273 * so, upper layer should issue REQUEST_SENSE to check the sense data
274 */
275
276 if (tag != dev->tag)
277 dev_err(&dev->sbd.core,
278 "%s:%u: tag mismatch, got %llx, expected %llx\n",
279 __func__, __LINE__, tag, dev->tag);
280
281 if (res) {
282 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
283 __func__, __LINE__, res, status);
284 return IRQ_HANDLED;
285 }
286
287 host = ps3_system_bus_get_drvdata(&dev->sbd);
288 priv = shost_priv(host);
289 cmd = priv->curr_cmd;
290
291 if (!status) {
292 /* OK, completed */
293 if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
294 int len;
295
296 len = scsi_sg_copy_from_buffer(cmd,
297 dev->bounce_buf,
298 dev->bounce_size);
299
300 scsi_set_resid(cmd, scsi_bufflen(cmd) - len);
301 }
302 cmd->result = DID_OK << 16;
303 goto done;
304 }
305
306 if (cmd->cmnd[0] == REQUEST_SENSE) {
307 /* SCSI spec says request sense should never get error */
308 dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n",
309 __func__, __LINE__);
310 cmd->result = DID_ERROR << 16 | SAM_STAT_CHECK_CONDITION;
311 goto done;
312 }
313
314 if (decode_lv1_status(status, &sense_key, &asc, &ascq)) {
315 cmd->result = DID_ERROR << 16;
316 goto done;
317 }
318
319 scsi_build_sense(cmd, 0, sense_key, asc, ascq);
320
321done:
322 priv->curr_cmd = NULL;
323 scsi_done(cmd);
324 return IRQ_HANDLED;
325}
326
327static const struct scsi_host_template ps3rom_host_template = {
328 .name = DEVICE_NAME,
329 .sdev_configure = ps3rom_sdev_configure,
330 .queuecommand = ps3rom_queuecommand,
331 .can_queue = 1,
332 .this_id = 7,
333 .sg_tablesize = SG_ALL,
334 .emulated = 1, /* only sg driver uses this */
335 .max_sectors = PS3ROM_MAX_SECTORS,
336 .module = THIS_MODULE,
337};
338
339
340static int ps3rom_probe(struct ps3_system_bus_device *_dev)
341{
342 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
343 int error;
344 struct Scsi_Host *host;
345 struct ps3rom_private *priv;
346
347 if (dev->blk_size != CD_FRAMESIZE) {
348 dev_err(&dev->sbd.core,
349 "%s:%u: cannot handle block size %llu\n", __func__,
350 __LINE__, dev->blk_size);
351 return -EINVAL;
352 }
353
354 dev->bounce_size = BOUNCE_SIZE;
355 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
356 if (!dev->bounce_buf)
357 return -ENOMEM;
358
359 error = ps3stor_setup(dev, ps3rom_interrupt);
360 if (error)
361 goto fail_free_bounce;
362
363 host = scsi_host_alloc(&ps3rom_host_template,
364 sizeof(struct ps3rom_private));
365 if (!host) {
366 dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n",
367 __func__, __LINE__);
368 error = -ENOMEM;
369 goto fail_teardown;
370 }
371
372 priv = shost_priv(host);
373 ps3_system_bus_set_drvdata(&dev->sbd, host);
374 priv->dev = dev;
375
376 /* One device/LUN per SCSI bus */
377 host->max_id = 1;
378 host->max_lun = 1;
379
380 error = scsi_add_host(host, &dev->sbd.core);
381 if (error) {
382 dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n",
383 __func__, __LINE__, error);
384 error = -ENODEV;
385 goto fail_host_put;
386 }
387
388 scsi_scan_host(host);
389 return 0;
390
391fail_host_put:
392 scsi_host_put(host);
393 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
394fail_teardown:
395 ps3stor_teardown(dev);
396fail_free_bounce:
397 kfree(dev->bounce_buf);
398 return error;
399}
400
401static void ps3rom_remove(struct ps3_system_bus_device *_dev)
402{
403 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
404 struct Scsi_Host *host = ps3_system_bus_get_drvdata(&dev->sbd);
405
406 scsi_remove_host(host);
407 ps3stor_teardown(dev);
408 scsi_host_put(host);
409 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
410 kfree(dev->bounce_buf);
411}
412
413static struct ps3_system_bus_driver ps3rom = {
414 .match_id = PS3_MATCH_ID_STOR_ROM,
415 .core.name = DEVICE_NAME,
416 .core.owner = THIS_MODULE,
417 .probe = ps3rom_probe,
418 .remove = ps3rom_remove
419};
420
421
422static int __init ps3rom_init(void)
423{
424 return ps3_system_bus_driver_register(&ps3rom);
425}
426
427static void __exit ps3rom_exit(void)
428{
429 ps3_system_bus_driver_unregister(&ps3rom);
430}
431
432module_init(ps3rom_init);
433module_exit(ps3rom_exit);
434
435MODULE_LICENSE("GPL");
436MODULE_DESCRIPTION("PS3 BD/DVD/CD-ROM Storage Driver");
437MODULE_AUTHOR("Sony Corporation");
438MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM);