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1da177e4 LT |
1 | /* -*- linux-c -*- |
2 | * drivers/cdrom/viocd.c | |
3 | * | |
4 | * iSeries Virtual CD Rom | |
5 | * | |
6 | * Authors: Dave Boutcher <boutcher@us.ibm.com> | |
7 | * Ryan Arnold <ryanarn@us.ibm.com> | |
8 | * Colin Devilbiss <devilbis@us.ibm.com> | |
8962cadb | 9 | * Stephen Rothwell |
1da177e4 LT |
10 | * |
11 | * (C) Copyright 2000-2004 IBM Corporation | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License as | |
15 | * published by the Free Software Foundation; either version 2 of the | |
16 | * License, or (at your option) anyu later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, but | |
19 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | * General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software Foundation, | |
25 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
26 | * | |
27 | * This routine provides access to CD ROM drives owned and managed by an | |
28 | * OS/400 partition running on the same box as this Linux partition. | |
29 | * | |
30 | * All operations are performed by sending messages back and forth to | |
31 | * the OS/400 partition. | |
32 | */ | |
33 | ||
e597cd09 JP |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
1da177e4 LT |
36 | #include <linux/major.h> |
37 | #include <linux/blkdev.h> | |
38 | #include <linux/cdrom.h> | |
39 | #include <linux/errno.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/dma-mapping.h> | |
42 | #include <linux/module.h> | |
43 | #include <linux/completion.h> | |
44 | #include <linux/proc_fs.h> | |
2a48fc0a | 45 | #include <linux/mutex.h> |
1da177e4 | 46 | #include <linux/seq_file.h> |
3d1266c7 | 47 | #include <linux/scatterlist.h> |
1da177e4 | 48 | |
1da177e4 | 49 | #include <asm/vio.h> |
1ec65d76 | 50 | #include <asm/iseries/hv_types.h> |
e45423ea | 51 | #include <asm/iseries/hv_lp_event.h> |
b4206778 | 52 | #include <asm/iseries/vio.h> |
31c72ad0 | 53 | #include <asm/firmware.h> |
1da177e4 LT |
54 | |
55 | #define VIOCD_DEVICE "iseries/vcd" | |
1da177e4 LT |
56 | |
57 | #define VIOCD_VERS "1.06" | |
58 | ||
1da177e4 LT |
59 | /* |
60 | * Should probably make this a module parameter....sigh | |
61 | */ | |
62 | #define VIOCD_MAX_CD HVMAXARCHITECTEDVIRTUALCDROMS | |
63 | ||
2a48fc0a | 64 | static DEFINE_MUTEX(viocd_mutex); |
1da177e4 LT |
65 | static const struct vio_error_entry viocd_err_table[] = { |
66 | {0x0201, EINVAL, "Invalid Range"}, | |
67 | {0x0202, EINVAL, "Invalid Token"}, | |
68 | {0x0203, EIO, "DMA Error"}, | |
69 | {0x0204, EIO, "Use Error"}, | |
70 | {0x0205, EIO, "Release Error"}, | |
71 | {0x0206, EINVAL, "Invalid CD"}, | |
72 | {0x020C, EROFS, "Read Only Device"}, | |
73 | {0x020D, ENOMEDIUM, "Changed or Missing Volume (or Varied Off?)"}, | |
74 | {0x020E, EIO, "Optical System Error (Varied Off?)"}, | |
75 | {0x02FF, EIO, "Internal Error"}, | |
76 | {0x3010, EIO, "Changed Volume"}, | |
77 | {0xC100, EIO, "Optical System Error"}, | |
78 | {0x0000, 0, NULL}, | |
79 | }; | |
80 | ||
81 | /* | |
82 | * This is the structure we use to exchange info between driver and interrupt | |
83 | * handler | |
84 | */ | |
85 | struct viocd_waitevent { | |
86 | struct completion com; | |
87 | int rc; | |
88 | u16 sub_result; | |
89 | int changed; | |
90 | }; | |
91 | ||
92 | /* this is a lookup table for the true capabilities of a device */ | |
93 | struct capability_entry { | |
94 | char *type; | |
95 | int capability; | |
96 | }; | |
97 | ||
98 | static struct capability_entry capability_table[] __initdata = { | |
99 | { "6330", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
100 | { "6331", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
101 | { "6333", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
102 | { "632A", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
103 | { "6321", CDC_LOCK }, | |
104 | { "632B", 0 }, | |
105 | { NULL , CDC_LOCK }, | |
106 | }; | |
107 | ||
108 | /* These are our internal structures for keeping track of devices */ | |
109 | static int viocd_numdev; | |
110 | ||
1da177e4 LT |
111 | struct disk_info { |
112 | struct gendisk *viocd_disk; | |
113 | struct cdrom_device_info viocd_info; | |
114 | struct device *dev; | |
b833b481 SR |
115 | const char *rsrcname; |
116 | const char *type; | |
117 | const char *model; | |
1da177e4 LT |
118 | }; |
119 | static struct disk_info viocd_diskinfo[VIOCD_MAX_CD]; | |
120 | ||
121 | #define DEVICE_NR(di) ((di) - &viocd_diskinfo[0]) | |
122 | ||
123 | static spinlock_t viocd_reqlock; | |
124 | ||
125 | #define MAX_CD_REQ 1 | |
126 | ||
127 | /* procfs support */ | |
128 | static int proc_viocd_show(struct seq_file *m, void *v) | |
129 | { | |
130 | int i; | |
131 | ||
132 | for (i = 0; i < viocd_numdev; i++) { | |
133 | seq_printf(m, "viocd device %d is iSeries resource %10.10s" | |
134 | "type %4.4s, model %3.3s\n", | |
b833b481 SR |
135 | i, viocd_diskinfo[i].rsrcname, |
136 | viocd_diskinfo[i].type, | |
137 | viocd_diskinfo[i].model); | |
1da177e4 LT |
138 | } |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int proc_viocd_open(struct inode *inode, struct file *file) | |
143 | { | |
144 | return single_open(file, proc_viocd_show, NULL); | |
145 | } | |
146 | ||
2b8693c0 | 147 | static const struct file_operations proc_viocd_operations = { |
c7705f34 | 148 | .owner = THIS_MODULE, |
1da177e4 LT |
149 | .open = proc_viocd_open, |
150 | .read = seq_read, | |
151 | .llseek = seq_lseek, | |
152 | .release = single_release, | |
153 | }; | |
154 | ||
4e379ae6 | 155 | static int viocd_blk_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 156 | { |
4e379ae6 | 157 | struct disk_info *di = bdev->bd_disk->private_data; |
6e9624b8 AB |
158 | int ret; |
159 | ||
2a48fc0a | 160 | mutex_lock(&viocd_mutex); |
6e9624b8 | 161 | ret = cdrom_open(&di->viocd_info, bdev, mode); |
2a48fc0a | 162 | mutex_unlock(&viocd_mutex); |
6e9624b8 AB |
163 | |
164 | return ret; | |
1da177e4 LT |
165 | } |
166 | ||
4e379ae6 | 167 | static int viocd_blk_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 168 | { |
4e379ae6 | 169 | struct disk_info *di = disk->private_data; |
2a48fc0a | 170 | mutex_lock(&viocd_mutex); |
4e379ae6 | 171 | cdrom_release(&di->viocd_info, mode); |
2a48fc0a | 172 | mutex_unlock(&viocd_mutex); |
bbc1cc97 | 173 | return 0; |
1da177e4 LT |
174 | } |
175 | ||
4e379ae6 | 176 | static int viocd_blk_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
177 | unsigned cmd, unsigned long arg) |
178 | { | |
4e379ae6 | 179 | struct disk_info *di = bdev->bd_disk->private_data; |
8a6cfeb6 AB |
180 | int ret; |
181 | ||
2a48fc0a | 182 | mutex_lock(&viocd_mutex); |
8a6cfeb6 | 183 | ret = cdrom_ioctl(&di->viocd_info, bdev, mode, cmd, arg); |
2a48fc0a | 184 | mutex_unlock(&viocd_mutex); |
8a6cfeb6 AB |
185 | |
186 | return ret; | |
1da177e4 LT |
187 | } |
188 | ||
1c27030b TH |
189 | static unsigned int viocd_blk_check_events(struct gendisk *disk, |
190 | unsigned int clearing) | |
1da177e4 LT |
191 | { |
192 | struct disk_info *di = disk->private_data; | |
1c27030b | 193 | return cdrom_check_events(&di->viocd_info, clearing); |
1da177e4 LT |
194 | } |
195 | ||
83d5cde4 | 196 | static const struct block_device_operations viocd_fops = { |
1da177e4 | 197 | .owner = THIS_MODULE, |
4e379ae6 AV |
198 | .open = viocd_blk_open, |
199 | .release = viocd_blk_release, | |
8a6cfeb6 | 200 | .ioctl = viocd_blk_ioctl, |
1c27030b | 201 | .check_events = viocd_blk_check_events, |
1da177e4 LT |
202 | }; |
203 | ||
1da177e4 LT |
204 | static int viocd_open(struct cdrom_device_info *cdi, int purpose) |
205 | { | |
206 | struct disk_info *diskinfo = cdi->handle; | |
207 | int device_no = DEVICE_NR(diskinfo); | |
208 | HvLpEvent_Rc hvrc; | |
209 | struct viocd_waitevent we; | |
210 | ||
211 | init_completion(&we.com); | |
212 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
213 | HvLpEvent_Type_VirtualIo, | |
214 | viomajorsubtype_cdio | viocdopen, | |
215 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
216 | viopath_sourceinst(viopath_hostLp), | |
217 | viopath_targetinst(viopath_hostLp), | |
218 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
219 | 0, 0, 0); | |
220 | if (hvrc != 0) { | |
e597cd09 JP |
221 | pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n", |
222 | (int)hvrc); | |
1da177e4 LT |
223 | return -EIO; |
224 | } | |
225 | ||
226 | wait_for_completion(&we.com); | |
227 | ||
228 | if (we.rc) { | |
229 | const struct vio_error_entry *err = | |
230 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
e597cd09 JP |
231 | pr_warning("bad rc %d:0x%04X on open: %s\n", |
232 | we.rc, we.sub_result, err->msg); | |
1da177e4 LT |
233 | return -err->errno; |
234 | } | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static void viocd_release(struct cdrom_device_info *cdi) | |
240 | { | |
241 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
242 | HvLpEvent_Rc hvrc; | |
243 | ||
244 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
245 | HvLpEvent_Type_VirtualIo, | |
246 | viomajorsubtype_cdio | viocdclose, | |
247 | HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck, | |
248 | viopath_sourceinst(viopath_hostLp), | |
249 | viopath_targetinst(viopath_hostLp), 0, | |
250 | VIOVERSION << 16, ((u64)device_no << 48), 0, 0, 0); | |
251 | if (hvrc != 0) | |
e597cd09 JP |
252 | pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n", |
253 | (int)hvrc); | |
1da177e4 LT |
254 | } |
255 | ||
256 | /* Send a read or write request to OS/400 */ | |
257 | static int send_request(struct request *req) | |
258 | { | |
259 | HvLpEvent_Rc hvrc; | |
260 | struct disk_info *diskinfo = req->rq_disk->private_data; | |
261 | u64 len; | |
262 | dma_addr_t dmaaddr; | |
263 | int direction; | |
264 | u16 cmd; | |
265 | struct scatterlist sg; | |
266 | ||
267 | BUG_ON(req->nr_phys_segments > 1); | |
268 | ||
269 | if (rq_data_dir(req) == READ) { | |
270 | direction = DMA_FROM_DEVICE; | |
271 | cmd = viomajorsubtype_cdio | viocdread; | |
272 | } else { | |
273 | direction = DMA_TO_DEVICE; | |
274 | cmd = viomajorsubtype_cdio | viocdwrite; | |
275 | } | |
276 | ||
3d1266c7 | 277 | sg_init_table(&sg, 1); |
1da177e4 | 278 | if (blk_rq_map_sg(req->q, req, &sg) == 0) { |
e597cd09 | 279 | pr_warning("error setting up scatter/gather list\n"); |
1da177e4 LT |
280 | return -1; |
281 | } | |
282 | ||
283 | if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) { | |
e597cd09 | 284 | pr_warning("error allocating sg tce\n"); |
1da177e4 LT |
285 | return -1; |
286 | } | |
287 | dmaaddr = sg_dma_address(&sg); | |
288 | len = sg_dma_len(&sg); | |
289 | ||
290 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
291 | HvLpEvent_Type_VirtualIo, cmd, | |
292 | HvLpEvent_AckInd_DoAck, | |
293 | HvLpEvent_AckType_ImmediateAck, | |
294 | viopath_sourceinst(viopath_hostLp), | |
295 | viopath_targetinst(viopath_hostLp), | |
296 | (u64)req, VIOVERSION << 16, | |
297 | ((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr, | |
83096ebf | 298 | (u64)blk_rq_pos(req) * 512, len, 0); |
1da177e4 | 299 | if (hvrc != HvLpEvent_Rc_Good) { |
e597cd09 | 300 | pr_warning("hv error on op %d\n", (int)hvrc); |
1da177e4 LT |
301 | return -1; |
302 | } | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
1da177e4 LT |
307 | static int rwreq; |
308 | ||
165125e1 | 309 | static void do_viocd_request(struct request_queue *q) |
1da177e4 LT |
310 | { |
311 | struct request *req; | |
312 | ||
9934c8c0 | 313 | while ((rwreq == 0) && ((req = blk_fetch_request(q)) != NULL)) { |
33659ebb | 314 | if (req->cmd_type != REQ_TYPE_FS) |
40cbbb78 | 315 | __blk_end_request_all(req, -EIO); |
1da177e4 | 316 | else if (send_request(req) < 0) { |
e597cd09 | 317 | pr_warning("unable to send message to OS/400!\n"); |
40cbbb78 | 318 | __blk_end_request_all(req, -EIO); |
1da177e4 LT |
319 | } else |
320 | rwreq++; | |
321 | } | |
322 | } | |
323 | ||
1c27030b TH |
324 | static unsigned int viocd_check_events(struct cdrom_device_info *cdi, |
325 | unsigned int clearing, int disc_nr) | |
1da177e4 LT |
326 | { |
327 | struct viocd_waitevent we; | |
328 | HvLpEvent_Rc hvrc; | |
329 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
330 | ||
331 | init_completion(&we.com); | |
332 | ||
333 | /* Send the open event to OS/400 */ | |
334 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
335 | HvLpEvent_Type_VirtualIo, | |
336 | viomajorsubtype_cdio | viocdcheck, | |
337 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
338 | viopath_sourceinst(viopath_hostLp), | |
339 | viopath_targetinst(viopath_hostLp), | |
340 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
341 | 0, 0, 0); | |
342 | if (hvrc != 0) { | |
e597cd09 JP |
343 | pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n", |
344 | (int)hvrc); | |
1c27030b | 345 | return 0; |
1da177e4 LT |
346 | } |
347 | ||
348 | wait_for_completion(&we.com); | |
349 | ||
350 | /* Check the return code. If bad, assume no change */ | |
351 | if (we.rc) { | |
352 | const struct vio_error_entry *err = | |
353 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
e597cd09 JP |
354 | pr_warning("bad rc %d:0x%04X on check_change: %s; Assuming no change\n", |
355 | we.rc, we.sub_result, err->msg); | |
1da177e4 LT |
356 | return 0; |
357 | } | |
358 | ||
1c27030b | 359 | return we.changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1da177e4 LT |
360 | } |
361 | ||
362 | static int viocd_lock_door(struct cdrom_device_info *cdi, int locking) | |
363 | { | |
364 | HvLpEvent_Rc hvrc; | |
365 | u64 device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
366 | /* NOTE: flags is 1 or 0 so it won't overwrite the device_no */ | |
367 | u64 flags = !!locking; | |
368 | struct viocd_waitevent we; | |
369 | ||
370 | init_completion(&we.com); | |
371 | ||
372 | /* Send the lockdoor event to OS/400 */ | |
373 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
374 | HvLpEvent_Type_VirtualIo, | |
375 | viomajorsubtype_cdio | viocdlockdoor, | |
376 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
377 | viopath_sourceinst(viopath_hostLp), | |
378 | viopath_targetinst(viopath_hostLp), | |
379 | (u64)&we, VIOVERSION << 16, | |
380 | (device_no << 48) | (flags << 32), 0, 0, 0); | |
381 | if (hvrc != 0) { | |
e597cd09 JP |
382 | pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n", |
383 | (int)hvrc); | |
1da177e4 LT |
384 | return -EIO; |
385 | } | |
386 | ||
387 | wait_for_completion(&we.com); | |
388 | ||
389 | if (we.rc != 0) | |
390 | return -EIO; | |
391 | return 0; | |
392 | } | |
393 | ||
394 | static int viocd_packet(struct cdrom_device_info *cdi, | |
395 | struct packet_command *cgc) | |
396 | { | |
397 | unsigned int buflen = cgc->buflen; | |
398 | int ret = -EIO; | |
399 | ||
400 | switch (cgc->cmd[0]) { | |
401 | case GPCMD_READ_DISC_INFO: | |
402 | { | |
403 | disc_information *di = (disc_information *)cgc->buffer; | |
404 | ||
405 | if (buflen >= 2) { | |
406 | di->disc_information_length = cpu_to_be16(1); | |
407 | ret = 0; | |
408 | } | |
409 | if (buflen >= 3) | |
410 | di->erasable = | |
411 | (cdi->ops->capability & ~cdi->mask | |
412 | & (CDC_DVD_RAM | CDC_RAM)) != 0; | |
413 | } | |
414 | break; | |
9db29258 SR |
415 | case GPCMD_GET_CONFIGURATION: |
416 | if (cgc->cmd[3] == CDF_RWRT) { | |
417 | struct rwrt_feature_desc *rfd = (struct rwrt_feature_desc *)(cgc->buffer + sizeof(struct feature_header)); | |
418 | ||
419 | if ((buflen >= | |
420 | (sizeof(struct feature_header) + sizeof(*rfd))) && | |
421 | (cdi->ops->capability & ~cdi->mask | |
422 | & (CDC_DVD_RAM | CDC_RAM))) { | |
423 | rfd->feature_code = cpu_to_be16(CDF_RWRT); | |
424 | rfd->curr = 1; | |
425 | ret = 0; | |
426 | } | |
427 | } | |
428 | break; | |
1da177e4 LT |
429 | default: |
430 | if (cgc->sense) { | |
431 | /* indicate Unknown code */ | |
432 | cgc->sense->sense_key = 0x05; | |
433 | cgc->sense->asc = 0x20; | |
434 | cgc->sense->ascq = 0x00; | |
435 | } | |
436 | break; | |
437 | } | |
438 | ||
439 | cgc->stat = ret; | |
440 | return ret; | |
441 | } | |
442 | ||
443 | static void restart_all_queues(int first_index) | |
444 | { | |
445 | int i; | |
446 | ||
447 | for (i = first_index + 1; i < viocd_numdev; i++) | |
448 | if (viocd_diskinfo[i].viocd_disk) | |
449 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
450 | for (i = 0; i <= first_index; i++) | |
451 | if (viocd_diskinfo[i].viocd_disk) | |
452 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
453 | } | |
454 | ||
455 | /* This routine handles incoming CD LP events */ | |
456 | static void vio_handle_cd_event(struct HvLpEvent *event) | |
457 | { | |
458 | struct viocdlpevent *bevent; | |
459 | struct viocd_waitevent *pwe; | |
460 | struct disk_info *di; | |
461 | unsigned long flags; | |
462 | struct request *req; | |
463 | ||
464 | ||
465 | if (event == NULL) | |
466 | /* Notification that a partition went away! */ | |
467 | return; | |
468 | /* First, we should NEVER get an int here...only acks */ | |
677f8c0d | 469 | if (hvlpevent_is_int(event)) { |
e597cd09 | 470 | pr_warning("Yikes! got an int in viocd event handler!\n"); |
677f8c0d | 471 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
472 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
473 | HvCallEvent_ackLpEvent(event); | |
474 | } | |
475 | } | |
476 | ||
477 | bevent = (struct viocdlpevent *)event; | |
478 | ||
479 | switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) { | |
480 | case viocdopen: | |
481 | if (event->xRc == 0) { | |
482 | di = &viocd_diskinfo[bevent->disk]; | |
e1defc4f MP |
483 | blk_queue_logical_block_size(di->viocd_disk->queue, |
484 | bevent->block_size); | |
1da177e4 LT |
485 | set_capacity(di->viocd_disk, |
486 | bevent->media_size * | |
487 | bevent->block_size / 512); | |
488 | } | |
489 | /* FALLTHROUGH !! */ | |
1da177e4 LT |
490 | case viocdlockdoor: |
491 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
492 | return_complete: | |
493 | pwe->rc = event->xRc; | |
494 | pwe->sub_result = bevent->sub_result; | |
495 | complete(&pwe->com); | |
496 | break; | |
497 | ||
498 | case viocdcheck: | |
499 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
500 | pwe->changed = bevent->flags; | |
501 | goto return_complete; | |
502 | ||
503 | case viocdclose: | |
504 | break; | |
505 | ||
506 | case viocdwrite: | |
507 | case viocdread: | |
508 | /* | |
509 | * Since this is running in interrupt mode, we need to | |
510 | * make sure we're not stepping on any global I/O operations | |
511 | */ | |
512 | di = &viocd_diskinfo[bevent->disk]; | |
513 | spin_lock_irqsave(&viocd_reqlock, flags); | |
514 | dma_unmap_single(di->dev, bevent->token, bevent->len, | |
515 | ((event->xSubtype & VIOMINOR_SUBTYPE_MASK) == viocdread) | |
516 | ? DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
517 | req = (struct request *)bevent->event.xCorrelationToken; | |
518 | rwreq--; | |
519 | ||
520 | if (event->xRc != HvLpEvent_Rc_Good) { | |
521 | const struct vio_error_entry *err = | |
522 | vio_lookup_rc(viocd_err_table, | |
523 | bevent->sub_result); | |
e597cd09 JP |
524 | pr_warning("request %p failed with rc %d:0x%04X: %s\n", |
525 | req, event->xRc, | |
526 | bevent->sub_result, err->msg); | |
40cbbb78 | 527 | __blk_end_request_all(req, -EIO); |
1da177e4 | 528 | } else |
40cbbb78 | 529 | __blk_end_request_all(req, 0); |
1da177e4 LT |
530 | |
531 | /* restart handling of incoming requests */ | |
532 | spin_unlock_irqrestore(&viocd_reqlock, flags); | |
533 | restart_all_queues(bevent->disk); | |
534 | break; | |
535 | ||
536 | default: | |
e597cd09 JP |
537 | pr_warning("message with invalid subtype %0x04X!\n", |
538 | event->xSubtype & VIOMINOR_SUBTYPE_MASK); | |
677f8c0d | 539 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
540 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
541 | HvCallEvent_ackLpEvent(event); | |
542 | } | |
543 | } | |
544 | } | |
545 | ||
3e636f78 BP |
546 | static int viocd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, |
547 | void *arg) | |
548 | { | |
549 | return -EINVAL; | |
550 | } | |
551 | ||
1da177e4 LT |
552 | static struct cdrom_device_ops viocd_dops = { |
553 | .open = viocd_open, | |
554 | .release = viocd_release, | |
1c27030b | 555 | .check_events = viocd_check_events, |
1da177e4 LT |
556 | .lock_door = viocd_lock_door, |
557 | .generic_packet = viocd_packet, | |
3e636f78 | 558 | .audio_ioctl = viocd_audio_ioctl, |
6a2900b6 | 559 | .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_GENERIC_PACKET | CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_RAM |
1da177e4 LT |
560 | }; |
561 | ||
c7211927 | 562 | static int find_capability(const char *type) |
1da177e4 LT |
563 | { |
564 | struct capability_entry *entry; | |
565 | ||
566 | for(entry = capability_table; entry->type; ++entry) | |
567 | if(!strncmp(entry->type, type, 4)) | |
568 | break; | |
569 | return entry->capability; | |
570 | } | |
571 | ||
572 | static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
573 | { | |
574 | struct gendisk *gendisk; | |
575 | int deviceno; | |
576 | struct disk_info *d; | |
577 | struct cdrom_device_info *c; | |
1da177e4 | 578 | struct request_queue *q; |
61c7a080 | 579 | struct device_node *node = vdev->dev.of_node; |
1da177e4 LT |
580 | |
581 | deviceno = vdev->unit_address; | |
d3375ea7 | 582 | if (deviceno >= VIOCD_MAX_CD) |
1da177e4 | 583 | return -ENODEV; |
b833b481 SR |
584 | if (!node) |
585 | return -ENODEV; | |
586 | ||
587 | if (deviceno >= viocd_numdev) | |
588 | viocd_numdev = deviceno + 1; | |
1da177e4 LT |
589 | |
590 | d = &viocd_diskinfo[deviceno]; | |
b833b481 SR |
591 | d->rsrcname = of_get_property(node, "linux,vio_rsrcname", NULL); |
592 | d->type = of_get_property(node, "linux,vio_type", NULL); | |
593 | d->model = of_get_property(node, "linux,vio_model", NULL); | |
594 | ||
1da177e4 | 595 | c = &d->viocd_info; |
1da177e4 LT |
596 | |
597 | c->ops = &viocd_dops; | |
598 | c->speed = 4; | |
599 | c->capacity = 1; | |
600 | c->handle = d; | |
b833b481 | 601 | c->mask = ~find_capability(d->type); |
1da177e4 LT |
602 | sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno); |
603 | ||
604 | if (register_cdrom(c) != 0) { | |
e597cd09 | 605 | pr_warning("Cannot register viocd CD-ROM %s!\n", c->name); |
1da177e4 LT |
606 | goto out; |
607 | } | |
e597cd09 JP |
608 | pr_info("cd %s is iSeries resource %10.10s type %4.4s, model %3.3s\n", |
609 | c->name, d->rsrcname, d->type, d->model); | |
1da177e4 LT |
610 | q = blk_init_queue(do_viocd_request, &viocd_reqlock); |
611 | if (q == NULL) { | |
e597cd09 | 612 | pr_warning("Cannot allocate queue for %s!\n", c->name); |
1da177e4 LT |
613 | goto out_unregister_cdrom; |
614 | } | |
615 | gendisk = alloc_disk(1); | |
616 | if (gendisk == NULL) { | |
e597cd09 | 617 | pr_warning("Cannot create gendisk for %s!\n", c->name); |
1da177e4 LT |
618 | goto out_cleanup_queue; |
619 | } | |
620 | gendisk->major = VIOCD_MAJOR; | |
621 | gendisk->first_minor = deviceno; | |
622 | strncpy(gendisk->disk_name, c->name, | |
623 | sizeof(gendisk->disk_name)); | |
8a78362c | 624 | blk_queue_max_segments(q, 1); |
086fa5ff | 625 | blk_queue_max_hw_sectors(q, 4096 / 512); |
1da177e4 LT |
626 | gendisk->queue = q; |
627 | gendisk->fops = &viocd_fops; | |
628 | gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE; | |
1c27030b | 629 | gendisk->events = DISK_EVENT_MEDIA_CHANGE; |
1da177e4 LT |
630 | set_capacity(gendisk, 0); |
631 | gendisk->private_data = d; | |
632 | d->viocd_disk = gendisk; | |
633 | d->dev = &vdev->dev; | |
634 | gendisk->driverfs_dev = d->dev; | |
635 | add_disk(gendisk); | |
636 | return 0; | |
637 | ||
638 | out_cleanup_queue: | |
639 | blk_cleanup_queue(q); | |
640 | out_unregister_cdrom: | |
641 | unregister_cdrom(c); | |
642 | out: | |
643 | return -ENODEV; | |
644 | } | |
645 | ||
646 | static int viocd_remove(struct vio_dev *vdev) | |
647 | { | |
648 | struct disk_info *d = &viocd_diskinfo[vdev->unit_address]; | |
649 | ||
0a0c4114 | 650 | unregister_cdrom(&d->viocd_info); |
1da177e4 LT |
651 | del_gendisk(d->viocd_disk); |
652 | blk_cleanup_queue(d->viocd_disk->queue); | |
653 | put_disk(d->viocd_disk); | |
654 | return 0; | |
655 | } | |
656 | ||
657 | /** | |
658 | * viocd_device_table: Used by vio.c to match devices that we | |
659 | * support. | |
660 | */ | |
661 | static struct vio_device_id viocd_device_table[] __devinitdata = { | |
de0fe3b8 | 662 | { "block", "IBM,iSeries-viocd" }, |
fb120da6 | 663 | { "", "" } |
1da177e4 | 664 | }; |
1da177e4 | 665 | MODULE_DEVICE_TABLE(vio, viocd_device_table); |
915124d8 | 666 | |
1da177e4 | 667 | static struct vio_driver viocd_driver = { |
1da177e4 LT |
668 | .id_table = viocd_device_table, |
669 | .probe = viocd_probe, | |
6fdf5392 SR |
670 | .remove = viocd_remove, |
671 | .driver = { | |
672 | .name = "viocd", | |
915124d8 | 673 | .owner = THIS_MODULE, |
6fdf5392 | 674 | } |
1da177e4 LT |
675 | }; |
676 | ||
677 | static int __init viocd_init(void) | |
678 | { | |
1da177e4 LT |
679 | int ret = 0; |
680 | ||
31c72ad0 SR |
681 | if (!firmware_has_feature(FW_FEATURE_ISERIES)) |
682 | return -ENODEV; | |
683 | ||
1da177e4 LT |
684 | if (viopath_hostLp == HvLpIndexInvalid) { |
685 | vio_set_hostlp(); | |
686 | /* If we don't have a host, bail out */ | |
687 | if (viopath_hostLp == HvLpIndexInvalid) | |
688 | return -ENODEV; | |
689 | } | |
690 | ||
e597cd09 | 691 | pr_info("vers " VIOCD_VERS ", hosting partition %d\n", viopath_hostLp); |
1da177e4 LT |
692 | |
693 | if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) { | |
e597cd09 JP |
694 | pr_warning("Unable to get major %d for %s\n", |
695 | VIOCD_MAJOR, VIOCD_DEVICE); | |
1da177e4 LT |
696 | return -EIO; |
697 | } | |
698 | ||
699 | ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio, | |
700 | MAX_CD_REQ + 2); | |
701 | if (ret) { | |
e597cd09 JP |
702 | pr_warning("error opening path to host partition %d\n", |
703 | viopath_hostLp); | |
1da177e4 LT |
704 | goto out_unregister; |
705 | } | |
706 | ||
707 | /* Initialize our request handler */ | |
708 | vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event); | |
709 | ||
1da177e4 LT |
710 | spin_lock_init(&viocd_reqlock); |
711 | ||
712 | ret = vio_register_driver(&viocd_driver); | |
713 | if (ret) | |
714 | goto out_free_info; | |
715 | ||
c7705f34 DL |
716 | proc_create("iSeries/viocd", S_IFREG|S_IRUGO, NULL, |
717 | &proc_viocd_operations); | |
1da177e4 LT |
718 | return 0; |
719 | ||
720 | out_free_info: | |
1da177e4 LT |
721 | vio_clearHandler(viomajorsubtype_cdio); |
722 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); | |
723 | out_unregister: | |
724 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
725 | return ret; | |
726 | } | |
727 | ||
728 | static void __exit viocd_exit(void) | |
729 | { | |
730 | remove_proc_entry("iSeries/viocd", NULL); | |
731 | vio_unregister_driver(&viocd_driver); | |
1da177e4 LT |
732 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); |
733 | vio_clearHandler(viomajorsubtype_cdio); | |
734 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
735 | } | |
736 | ||
737 | module_init(viocd_init); | |
738 | module_exit(viocd_exit); | |
739 | MODULE_LICENSE("GPL"); |