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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> | |
9 | * Stephen Rothwell <sfr@au1.ibm.com> | |
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 | ||
34 | #include <linux/major.h> | |
35 | #include <linux/blkdev.h> | |
36 | #include <linux/cdrom.h> | |
37 | #include <linux/errno.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/dma-mapping.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/completion.h> | |
42 | #include <linux/proc_fs.h> | |
43 | #include <linux/seq_file.h> | |
3d1266c7 | 44 | #include <linux/scatterlist.h> |
1da177e4 | 45 | |
1da177e4 | 46 | #include <asm/vio.h> |
1ec65d76 | 47 | #include <asm/iseries/hv_types.h> |
e45423ea | 48 | #include <asm/iseries/hv_lp_event.h> |
b4206778 | 49 | #include <asm/iseries/vio.h> |
31c72ad0 | 50 | #include <asm/firmware.h> |
1da177e4 LT |
51 | |
52 | #define VIOCD_DEVICE "iseries/vcd" | |
1da177e4 LT |
53 | |
54 | #define VIOCD_VERS "1.06" | |
55 | ||
56 | #define VIOCD_KERN_WARNING KERN_WARNING "viocd: " | |
57 | #define VIOCD_KERN_INFO KERN_INFO "viocd: " | |
58 | ||
1da177e4 LT |
59 | /* |
60 | * Should probably make this a module parameter....sigh | |
61 | */ | |
62 | #define VIOCD_MAX_CD HVMAXARCHITECTEDVIRTUALCDROMS | |
63 | ||
64 | static const struct vio_error_entry viocd_err_table[] = { | |
65 | {0x0201, EINVAL, "Invalid Range"}, | |
66 | {0x0202, EINVAL, "Invalid Token"}, | |
67 | {0x0203, EIO, "DMA Error"}, | |
68 | {0x0204, EIO, "Use Error"}, | |
69 | {0x0205, EIO, "Release Error"}, | |
70 | {0x0206, EINVAL, "Invalid CD"}, | |
71 | {0x020C, EROFS, "Read Only Device"}, | |
72 | {0x020D, ENOMEDIUM, "Changed or Missing Volume (or Varied Off?)"}, | |
73 | {0x020E, EIO, "Optical System Error (Varied Off?)"}, | |
74 | {0x02FF, EIO, "Internal Error"}, | |
75 | {0x3010, EIO, "Changed Volume"}, | |
76 | {0xC100, EIO, "Optical System Error"}, | |
77 | {0x0000, 0, NULL}, | |
78 | }; | |
79 | ||
80 | /* | |
81 | * This is the structure we use to exchange info between driver and interrupt | |
82 | * handler | |
83 | */ | |
84 | struct viocd_waitevent { | |
85 | struct completion com; | |
86 | int rc; | |
87 | u16 sub_result; | |
88 | int changed; | |
89 | }; | |
90 | ||
91 | /* this is a lookup table for the true capabilities of a device */ | |
92 | struct capability_entry { | |
93 | char *type; | |
94 | int capability; | |
95 | }; | |
96 | ||
97 | static struct capability_entry capability_table[] __initdata = { | |
98 | { "6330", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
99 | { "6331", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
100 | { "6333", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
101 | { "632A", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
102 | { "6321", CDC_LOCK }, | |
103 | { "632B", 0 }, | |
104 | { NULL , CDC_LOCK }, | |
105 | }; | |
106 | ||
107 | /* These are our internal structures for keeping track of devices */ | |
108 | static int viocd_numdev; | |
109 | ||
1da177e4 LT |
110 | struct disk_info { |
111 | struct gendisk *viocd_disk; | |
112 | struct cdrom_device_info viocd_info; | |
113 | struct device *dev; | |
b833b481 SR |
114 | const char *rsrcname; |
115 | const char *type; | |
116 | const char *model; | |
1da177e4 LT |
117 | }; |
118 | static struct disk_info viocd_diskinfo[VIOCD_MAX_CD]; | |
119 | ||
120 | #define DEVICE_NR(di) ((di) - &viocd_diskinfo[0]) | |
121 | ||
122 | static spinlock_t viocd_reqlock; | |
123 | ||
124 | #define MAX_CD_REQ 1 | |
125 | ||
126 | /* procfs support */ | |
127 | static int proc_viocd_show(struct seq_file *m, void *v) | |
128 | { | |
129 | int i; | |
130 | ||
131 | for (i = 0; i < viocd_numdev; i++) { | |
132 | seq_printf(m, "viocd device %d is iSeries resource %10.10s" | |
133 | "type %4.4s, model %3.3s\n", | |
b833b481 SR |
134 | i, viocd_diskinfo[i].rsrcname, |
135 | viocd_diskinfo[i].type, | |
136 | viocd_diskinfo[i].model); | |
1da177e4 LT |
137 | } |
138 | return 0; | |
139 | } | |
140 | ||
141 | static int proc_viocd_open(struct inode *inode, struct file *file) | |
142 | { | |
143 | return single_open(file, proc_viocd_show, NULL); | |
144 | } | |
145 | ||
2b8693c0 | 146 | static const struct file_operations proc_viocd_operations = { |
1da177e4 LT |
147 | .open = proc_viocd_open, |
148 | .read = seq_read, | |
149 | .llseek = seq_lseek, | |
150 | .release = single_release, | |
151 | }; | |
152 | ||
153 | static int viocd_blk_open(struct inode *inode, struct file *file) | |
154 | { | |
155 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
156 | return cdrom_open(&di->viocd_info, inode, file); | |
157 | } | |
158 | ||
159 | static int viocd_blk_release(struct inode *inode, struct file *file) | |
160 | { | |
161 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
162 | return cdrom_release(&di->viocd_info, file); | |
163 | } | |
164 | ||
165 | static int viocd_blk_ioctl(struct inode *inode, struct file *file, | |
166 | unsigned cmd, unsigned long arg) | |
167 | { | |
168 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
169 | return cdrom_ioctl(file, &di->viocd_info, inode, cmd, arg); | |
170 | } | |
171 | ||
172 | static int viocd_blk_media_changed(struct gendisk *disk) | |
173 | { | |
174 | struct disk_info *di = disk->private_data; | |
175 | return cdrom_media_changed(&di->viocd_info); | |
176 | } | |
177 | ||
178 | struct block_device_operations viocd_fops = { | |
179 | .owner = THIS_MODULE, | |
180 | .open = viocd_blk_open, | |
181 | .release = viocd_blk_release, | |
182 | .ioctl = viocd_blk_ioctl, | |
183 | .media_changed = viocd_blk_media_changed, | |
184 | }; | |
185 | ||
1da177e4 LT |
186 | static int viocd_open(struct cdrom_device_info *cdi, int purpose) |
187 | { | |
188 | struct disk_info *diskinfo = cdi->handle; | |
189 | int device_no = DEVICE_NR(diskinfo); | |
190 | HvLpEvent_Rc hvrc; | |
191 | struct viocd_waitevent we; | |
192 | ||
193 | init_completion(&we.com); | |
194 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
195 | HvLpEvent_Type_VirtualIo, | |
196 | viomajorsubtype_cdio | viocdopen, | |
197 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
198 | viopath_sourceinst(viopath_hostLp), | |
199 | viopath_targetinst(viopath_hostLp), | |
200 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
201 | 0, 0, 0); | |
202 | if (hvrc != 0) { | |
203 | printk(VIOCD_KERN_WARNING | |
204 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
205 | (int)hvrc); | |
206 | return -EIO; | |
207 | } | |
208 | ||
209 | wait_for_completion(&we.com); | |
210 | ||
211 | if (we.rc) { | |
212 | const struct vio_error_entry *err = | |
213 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
214 | printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on open: %s\n", | |
215 | we.rc, we.sub_result, err->msg); | |
216 | return -err->errno; | |
217 | } | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static void viocd_release(struct cdrom_device_info *cdi) | |
223 | { | |
224 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
225 | HvLpEvent_Rc hvrc; | |
226 | ||
227 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
228 | HvLpEvent_Type_VirtualIo, | |
229 | viomajorsubtype_cdio | viocdclose, | |
230 | HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck, | |
231 | viopath_sourceinst(viopath_hostLp), | |
232 | viopath_targetinst(viopath_hostLp), 0, | |
233 | VIOVERSION << 16, ((u64)device_no << 48), 0, 0, 0); | |
234 | if (hvrc != 0) | |
235 | printk(VIOCD_KERN_WARNING | |
236 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
237 | (int)hvrc); | |
238 | } | |
239 | ||
240 | /* Send a read or write request to OS/400 */ | |
241 | static int send_request(struct request *req) | |
242 | { | |
243 | HvLpEvent_Rc hvrc; | |
244 | struct disk_info *diskinfo = req->rq_disk->private_data; | |
245 | u64 len; | |
246 | dma_addr_t dmaaddr; | |
247 | int direction; | |
248 | u16 cmd; | |
249 | struct scatterlist sg; | |
250 | ||
251 | BUG_ON(req->nr_phys_segments > 1); | |
252 | ||
253 | if (rq_data_dir(req) == READ) { | |
254 | direction = DMA_FROM_DEVICE; | |
255 | cmd = viomajorsubtype_cdio | viocdread; | |
256 | } else { | |
257 | direction = DMA_TO_DEVICE; | |
258 | cmd = viomajorsubtype_cdio | viocdwrite; | |
259 | } | |
260 | ||
3d1266c7 | 261 | sg_init_table(&sg, 1); |
1da177e4 LT |
262 | if (blk_rq_map_sg(req->q, req, &sg) == 0) { |
263 | printk(VIOCD_KERN_WARNING | |
264 | "error setting up scatter/gather list\n"); | |
265 | return -1; | |
266 | } | |
267 | ||
268 | if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) { | |
269 | printk(VIOCD_KERN_WARNING "error allocating sg tce\n"); | |
270 | return -1; | |
271 | } | |
272 | dmaaddr = sg_dma_address(&sg); | |
273 | len = sg_dma_len(&sg); | |
274 | ||
275 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
276 | HvLpEvent_Type_VirtualIo, cmd, | |
277 | HvLpEvent_AckInd_DoAck, | |
278 | HvLpEvent_AckType_ImmediateAck, | |
279 | viopath_sourceinst(viopath_hostLp), | |
280 | viopath_targetinst(viopath_hostLp), | |
281 | (u64)req, VIOVERSION << 16, | |
282 | ((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr, | |
283 | (u64)req->sector * 512, len, 0); | |
284 | if (hvrc != HvLpEvent_Rc_Good) { | |
285 | printk(VIOCD_KERN_WARNING "hv error on op %d\n", (int)hvrc); | |
286 | return -1; | |
287 | } | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
e935eb9d | 292 | static void viocd_end_request(struct request *req, int error) |
1ad7c311 TB |
293 | { |
294 | int nsectors = req->hard_nr_sectors; | |
295 | ||
296 | /* | |
297 | * Make sure it's fully ended, and ensure that we process | |
298 | * at least one sector. | |
299 | */ | |
300 | if (blk_pc_request(req)) | |
301 | nsectors = (req->data_len + 511) >> 9; | |
302 | if (!nsectors) | |
303 | nsectors = 1; | |
304 | ||
e935eb9d | 305 | if (__blk_end_request(req, error, nsectors << 9)) |
1ad7c311 | 306 | BUG(); |
1ad7c311 | 307 | } |
1da177e4 LT |
308 | |
309 | static int rwreq; | |
310 | ||
165125e1 | 311 | static void do_viocd_request(struct request_queue *q) |
1da177e4 LT |
312 | { |
313 | struct request *req; | |
314 | ||
315 | while ((rwreq == 0) && ((req = elv_next_request(q)) != NULL)) { | |
316 | if (!blk_fs_request(req)) | |
e935eb9d | 317 | viocd_end_request(req, -EIO); |
1da177e4 LT |
318 | else if (send_request(req) < 0) { |
319 | printk(VIOCD_KERN_WARNING | |
320 | "unable to send message to OS/400!"); | |
e935eb9d | 321 | viocd_end_request(req, -EIO); |
1da177e4 LT |
322 | } else |
323 | rwreq++; | |
324 | } | |
325 | } | |
326 | ||
327 | static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr) | |
328 | { | |
329 | struct viocd_waitevent we; | |
330 | HvLpEvent_Rc hvrc; | |
331 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
332 | ||
333 | init_completion(&we.com); | |
334 | ||
335 | /* Send the open event to OS/400 */ | |
336 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
337 | HvLpEvent_Type_VirtualIo, | |
338 | viomajorsubtype_cdio | viocdcheck, | |
339 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
340 | viopath_sourceinst(viopath_hostLp), | |
341 | viopath_targetinst(viopath_hostLp), | |
342 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
343 | 0, 0, 0); | |
344 | if (hvrc != 0) { | |
345 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
346 | (int)hvrc); | |
347 | return -EIO; | |
348 | } | |
349 | ||
350 | wait_for_completion(&we.com); | |
351 | ||
352 | /* Check the return code. If bad, assume no change */ | |
353 | if (we.rc) { | |
354 | const struct vio_error_entry *err = | |
355 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
356 | printk(VIOCD_KERN_WARNING | |
357 | "bad rc %d:0x%04X on check_change: %s; Assuming no change\n", | |
358 | we.rc, we.sub_result, err->msg); | |
359 | return 0; | |
360 | } | |
361 | ||
362 | return we.changed; | |
363 | } | |
364 | ||
365 | static int viocd_lock_door(struct cdrom_device_info *cdi, int locking) | |
366 | { | |
367 | HvLpEvent_Rc hvrc; | |
368 | u64 device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
369 | /* NOTE: flags is 1 or 0 so it won't overwrite the device_no */ | |
370 | u64 flags = !!locking; | |
371 | struct viocd_waitevent we; | |
372 | ||
373 | init_completion(&we.com); | |
374 | ||
375 | /* Send the lockdoor event to OS/400 */ | |
376 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
377 | HvLpEvent_Type_VirtualIo, | |
378 | viomajorsubtype_cdio | viocdlockdoor, | |
379 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
380 | viopath_sourceinst(viopath_hostLp), | |
381 | viopath_targetinst(viopath_hostLp), | |
382 | (u64)&we, VIOVERSION << 16, | |
383 | (device_no << 48) | (flags << 32), 0, 0, 0); | |
384 | if (hvrc != 0) { | |
385 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
386 | (int)hvrc); | |
387 | return -EIO; | |
388 | } | |
389 | ||
390 | wait_for_completion(&we.com); | |
391 | ||
392 | if (we.rc != 0) | |
393 | return -EIO; | |
394 | return 0; | |
395 | } | |
396 | ||
397 | static int viocd_packet(struct cdrom_device_info *cdi, | |
398 | struct packet_command *cgc) | |
399 | { | |
400 | unsigned int buflen = cgc->buflen; | |
401 | int ret = -EIO; | |
402 | ||
403 | switch (cgc->cmd[0]) { | |
404 | case GPCMD_READ_DISC_INFO: | |
405 | { | |
406 | disc_information *di = (disc_information *)cgc->buffer; | |
407 | ||
408 | if (buflen >= 2) { | |
409 | di->disc_information_length = cpu_to_be16(1); | |
410 | ret = 0; | |
411 | } | |
412 | if (buflen >= 3) | |
413 | di->erasable = | |
414 | (cdi->ops->capability & ~cdi->mask | |
415 | & (CDC_DVD_RAM | CDC_RAM)) != 0; | |
416 | } | |
417 | break; | |
9db29258 SR |
418 | case GPCMD_GET_CONFIGURATION: |
419 | if (cgc->cmd[3] == CDF_RWRT) { | |
420 | struct rwrt_feature_desc *rfd = (struct rwrt_feature_desc *)(cgc->buffer + sizeof(struct feature_header)); | |
421 | ||
422 | if ((buflen >= | |
423 | (sizeof(struct feature_header) + sizeof(*rfd))) && | |
424 | (cdi->ops->capability & ~cdi->mask | |
425 | & (CDC_DVD_RAM | CDC_RAM))) { | |
426 | rfd->feature_code = cpu_to_be16(CDF_RWRT); | |
427 | rfd->curr = 1; | |
428 | ret = 0; | |
429 | } | |
430 | } | |
431 | break; | |
1da177e4 LT |
432 | default: |
433 | if (cgc->sense) { | |
434 | /* indicate Unknown code */ | |
435 | cgc->sense->sense_key = 0x05; | |
436 | cgc->sense->asc = 0x20; | |
437 | cgc->sense->ascq = 0x00; | |
438 | } | |
439 | break; | |
440 | } | |
441 | ||
442 | cgc->stat = ret; | |
443 | return ret; | |
444 | } | |
445 | ||
446 | static void restart_all_queues(int first_index) | |
447 | { | |
448 | int i; | |
449 | ||
450 | for (i = first_index + 1; i < viocd_numdev; i++) | |
451 | if (viocd_diskinfo[i].viocd_disk) | |
452 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
453 | for (i = 0; i <= first_index; i++) | |
454 | if (viocd_diskinfo[i].viocd_disk) | |
455 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
456 | } | |
457 | ||
458 | /* This routine handles incoming CD LP events */ | |
459 | static void vio_handle_cd_event(struct HvLpEvent *event) | |
460 | { | |
461 | struct viocdlpevent *bevent; | |
462 | struct viocd_waitevent *pwe; | |
463 | struct disk_info *di; | |
464 | unsigned long flags; | |
465 | struct request *req; | |
466 | ||
467 | ||
468 | if (event == NULL) | |
469 | /* Notification that a partition went away! */ | |
470 | return; | |
471 | /* First, we should NEVER get an int here...only acks */ | |
677f8c0d | 472 | if (hvlpevent_is_int(event)) { |
1da177e4 LT |
473 | printk(VIOCD_KERN_WARNING |
474 | "Yikes! got an int in viocd event handler!\n"); | |
677f8c0d | 475 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
476 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
477 | HvCallEvent_ackLpEvent(event); | |
478 | } | |
479 | } | |
480 | ||
481 | bevent = (struct viocdlpevent *)event; | |
482 | ||
483 | switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) { | |
484 | case viocdopen: | |
485 | if (event->xRc == 0) { | |
486 | di = &viocd_diskinfo[bevent->disk]; | |
487 | blk_queue_hardsect_size(di->viocd_disk->queue, | |
488 | bevent->block_size); | |
489 | set_capacity(di->viocd_disk, | |
490 | bevent->media_size * | |
491 | bevent->block_size / 512); | |
492 | } | |
493 | /* FALLTHROUGH !! */ | |
1da177e4 LT |
494 | case viocdlockdoor: |
495 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
496 | return_complete: | |
497 | pwe->rc = event->xRc; | |
498 | pwe->sub_result = bevent->sub_result; | |
499 | complete(&pwe->com); | |
500 | break; | |
501 | ||
502 | case viocdcheck: | |
503 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
504 | pwe->changed = bevent->flags; | |
505 | goto return_complete; | |
506 | ||
507 | case viocdclose: | |
508 | break; | |
509 | ||
510 | case viocdwrite: | |
511 | case viocdread: | |
512 | /* | |
513 | * Since this is running in interrupt mode, we need to | |
514 | * make sure we're not stepping on any global I/O operations | |
515 | */ | |
516 | di = &viocd_diskinfo[bevent->disk]; | |
517 | spin_lock_irqsave(&viocd_reqlock, flags); | |
518 | dma_unmap_single(di->dev, bevent->token, bevent->len, | |
519 | ((event->xSubtype & VIOMINOR_SUBTYPE_MASK) == viocdread) | |
520 | ? DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
521 | req = (struct request *)bevent->event.xCorrelationToken; | |
522 | rwreq--; | |
523 | ||
524 | if (event->xRc != HvLpEvent_Rc_Good) { | |
525 | const struct vio_error_entry *err = | |
526 | vio_lookup_rc(viocd_err_table, | |
527 | bevent->sub_result); | |
528 | printk(VIOCD_KERN_WARNING "request %p failed " | |
529 | "with rc %d:0x%04X: %s\n", | |
530 | req, event->xRc, | |
531 | bevent->sub_result, err->msg); | |
e935eb9d | 532 | viocd_end_request(req, -EIO); |
1da177e4 | 533 | } else |
e935eb9d | 534 | viocd_end_request(req, 0); |
1da177e4 LT |
535 | |
536 | /* restart handling of incoming requests */ | |
537 | spin_unlock_irqrestore(&viocd_reqlock, flags); | |
538 | restart_all_queues(bevent->disk); | |
539 | break; | |
540 | ||
541 | default: | |
542 | printk(VIOCD_KERN_WARNING | |
543 | "message with invalid subtype %0x04X!\n", | |
544 | event->xSubtype & VIOMINOR_SUBTYPE_MASK); | |
677f8c0d | 545 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
546 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
547 | HvCallEvent_ackLpEvent(event); | |
548 | } | |
549 | } | |
550 | } | |
551 | ||
552 | static struct cdrom_device_ops viocd_dops = { | |
553 | .open = viocd_open, | |
554 | .release = viocd_release, | |
555 | .media_changed = viocd_media_changed, | |
556 | .lock_door = viocd_lock_door, | |
557 | .generic_packet = viocd_packet, | |
6a2900b6 | 558 | .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 |
559 | }; |
560 | ||
561 | static int __init find_capability(const char *type) | |
562 | { | |
563 | struct capability_entry *entry; | |
564 | ||
565 | for(entry = capability_table; entry->type; ++entry) | |
566 | if(!strncmp(entry->type, type, 4)) | |
567 | break; | |
568 | return entry->capability; | |
569 | } | |
570 | ||
571 | static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
572 | { | |
573 | struct gendisk *gendisk; | |
574 | int deviceno; | |
575 | struct disk_info *d; | |
576 | struct cdrom_device_info *c; | |
1da177e4 | 577 | struct request_queue *q; |
b833b481 | 578 | struct device_node *node = vdev->dev.archdata.of_node; |
1da177e4 LT |
579 | |
580 | deviceno = vdev->unit_address; | |
b833b481 | 581 | if (deviceno > VIOCD_MAX_CD) |
1da177e4 | 582 | return -ENODEV; |
b833b481 SR |
583 | if (!node) |
584 | return -ENODEV; | |
585 | ||
586 | if (deviceno >= viocd_numdev) | |
587 | viocd_numdev = deviceno + 1; | |
1da177e4 LT |
588 | |
589 | d = &viocd_diskinfo[deviceno]; | |
b833b481 SR |
590 | d->rsrcname = of_get_property(node, "linux,vio_rsrcname", NULL); |
591 | d->type = of_get_property(node, "linux,vio_type", NULL); | |
592 | d->model = of_get_property(node, "linux,vio_model", NULL); | |
593 | ||
1da177e4 | 594 | c = &d->viocd_info; |
1da177e4 LT |
595 | |
596 | c->ops = &viocd_dops; | |
597 | c->speed = 4; | |
598 | c->capacity = 1; | |
599 | c->handle = d; | |
b833b481 | 600 | c->mask = ~find_capability(d->type); |
1da177e4 LT |
601 | sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno); |
602 | ||
603 | if (register_cdrom(c) != 0) { | |
604 | printk(VIOCD_KERN_WARNING "Cannot register viocd CD-ROM %s!\n", | |
605 | c->name); | |
606 | goto out; | |
607 | } | |
608 | printk(VIOCD_KERN_INFO "cd %s is iSeries resource %10.10s " | |
609 | "type %4.4s, model %3.3s\n", | |
b833b481 | 610 | c->name, d->rsrcname, d->type, d->model); |
1da177e4 LT |
611 | q = blk_init_queue(do_viocd_request, &viocd_reqlock); |
612 | if (q == NULL) { | |
613 | printk(VIOCD_KERN_WARNING "Cannot allocate queue for %s!\n", | |
614 | c->name); | |
615 | goto out_unregister_cdrom; | |
616 | } | |
617 | gendisk = alloc_disk(1); | |
618 | if (gendisk == NULL) { | |
619 | printk(VIOCD_KERN_WARNING "Cannot create gendisk for %s!\n", | |
620 | c->name); | |
621 | goto out_cleanup_queue; | |
622 | } | |
623 | gendisk->major = VIOCD_MAJOR; | |
624 | gendisk->first_minor = deviceno; | |
625 | strncpy(gendisk->disk_name, c->name, | |
626 | sizeof(gendisk->disk_name)); | |
1da177e4 LT |
627 | blk_queue_max_hw_segments(q, 1); |
628 | blk_queue_max_phys_segments(q, 1); | |
629 | blk_queue_max_sectors(q, 4096 / 512); | |
630 | gendisk->queue = q; | |
631 | gendisk->fops = &viocd_fops; | |
632 | gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE; | |
633 | set_capacity(gendisk, 0); | |
634 | gendisk->private_data = d; | |
635 | d->viocd_disk = gendisk; | |
636 | d->dev = &vdev->dev; | |
637 | gendisk->driverfs_dev = d->dev; | |
638 | add_disk(gendisk); | |
639 | return 0; | |
640 | ||
641 | out_cleanup_queue: | |
642 | blk_cleanup_queue(q); | |
643 | out_unregister_cdrom: | |
644 | unregister_cdrom(c); | |
645 | out: | |
646 | return -ENODEV; | |
647 | } | |
648 | ||
649 | static int viocd_remove(struct vio_dev *vdev) | |
650 | { | |
651 | struct disk_info *d = &viocd_diskinfo[vdev->unit_address]; | |
652 | ||
653 | if (unregister_cdrom(&d->viocd_info) != 0) | |
654 | printk(VIOCD_KERN_WARNING | |
655 | "Cannot unregister viocd CD-ROM %s!\n", | |
656 | d->viocd_info.name); | |
657 | del_gendisk(d->viocd_disk); | |
658 | blk_cleanup_queue(d->viocd_disk->queue); | |
659 | put_disk(d->viocd_disk); | |
660 | return 0; | |
661 | } | |
662 | ||
663 | /** | |
664 | * viocd_device_table: Used by vio.c to match devices that we | |
665 | * support. | |
666 | */ | |
667 | static struct vio_device_id viocd_device_table[] __devinitdata = { | |
de0fe3b8 | 668 | { "block", "IBM,iSeries-viocd" }, |
fb120da6 | 669 | { "", "" } |
1da177e4 | 670 | }; |
1da177e4 | 671 | MODULE_DEVICE_TABLE(vio, viocd_device_table); |
915124d8 | 672 | |
1da177e4 | 673 | static struct vio_driver viocd_driver = { |
1da177e4 LT |
674 | .id_table = viocd_device_table, |
675 | .probe = viocd_probe, | |
6fdf5392 SR |
676 | .remove = viocd_remove, |
677 | .driver = { | |
678 | .name = "viocd", | |
915124d8 | 679 | .owner = THIS_MODULE, |
6fdf5392 | 680 | } |
1da177e4 LT |
681 | }; |
682 | ||
683 | static int __init viocd_init(void) | |
684 | { | |
685 | struct proc_dir_entry *e; | |
686 | int ret = 0; | |
687 | ||
31c72ad0 SR |
688 | if (!firmware_has_feature(FW_FEATURE_ISERIES)) |
689 | return -ENODEV; | |
690 | ||
1da177e4 LT |
691 | if (viopath_hostLp == HvLpIndexInvalid) { |
692 | vio_set_hostlp(); | |
693 | /* If we don't have a host, bail out */ | |
694 | if (viopath_hostLp == HvLpIndexInvalid) | |
695 | return -ENODEV; | |
696 | } | |
697 | ||
698 | printk(VIOCD_KERN_INFO "vers " VIOCD_VERS ", hosting partition %d\n", | |
699 | viopath_hostLp); | |
700 | ||
701 | if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) { | |
702 | printk(VIOCD_KERN_WARNING "Unable to get major %d for %s\n", | |
703 | VIOCD_MAJOR, VIOCD_DEVICE); | |
704 | return -EIO; | |
705 | } | |
706 | ||
707 | ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio, | |
708 | MAX_CD_REQ + 2); | |
709 | if (ret) { | |
710 | printk(VIOCD_KERN_WARNING | |
711 | "error opening path to host partition %d\n", | |
712 | viopath_hostLp); | |
713 | goto out_unregister; | |
714 | } | |
715 | ||
716 | /* Initialize our request handler */ | |
717 | vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event); | |
718 | ||
1da177e4 LT |
719 | spin_lock_init(&viocd_reqlock); |
720 | ||
721 | ret = vio_register_driver(&viocd_driver); | |
722 | if (ret) | |
723 | goto out_free_info; | |
724 | ||
725 | e = create_proc_entry("iSeries/viocd", S_IFREG|S_IRUGO, NULL); | |
726 | if (e) { | |
727 | e->owner = THIS_MODULE; | |
728 | e->proc_fops = &proc_viocd_operations; | |
729 | } | |
730 | ||
731 | return 0; | |
732 | ||
733 | out_free_info: | |
1da177e4 LT |
734 | vio_clearHandler(viomajorsubtype_cdio); |
735 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); | |
736 | out_unregister: | |
737 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
738 | return ret; | |
739 | } | |
740 | ||
741 | static void __exit viocd_exit(void) | |
742 | { | |
743 | remove_proc_entry("iSeries/viocd", NULL); | |
744 | vio_unregister_driver(&viocd_driver); | |
1da177e4 LT |
745 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); |
746 | vio_clearHandler(viomajorsubtype_cdio); | |
747 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
748 | } | |
749 | ||
750 | module_init(viocd_init); | |
751 | module_exit(viocd_exit); | |
752 | MODULE_LICENSE("GPL"); |