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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 | ||
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 = { |
c7705f34 | 147 | .owner = THIS_MODULE, |
1da177e4 LT |
148 | .open = proc_viocd_open, |
149 | .read = seq_read, | |
150 | .llseek = seq_lseek, | |
151 | .release = single_release, | |
152 | }; | |
153 | ||
4e379ae6 | 154 | static int viocd_blk_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 155 | { |
4e379ae6 AV |
156 | struct disk_info *di = bdev->bd_disk->private_data; |
157 | return cdrom_open(&di->viocd_info, bdev, mode); | |
1da177e4 LT |
158 | } |
159 | ||
4e379ae6 | 160 | static int viocd_blk_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 161 | { |
4e379ae6 AV |
162 | struct disk_info *di = disk->private_data; |
163 | cdrom_release(&di->viocd_info, mode); | |
bbc1cc97 | 164 | return 0; |
1da177e4 LT |
165 | } |
166 | ||
4e379ae6 | 167 | static int viocd_blk_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
168 | unsigned cmd, unsigned long arg) |
169 | { | |
4e379ae6 AV |
170 | struct disk_info *di = bdev->bd_disk->private_data; |
171 | return cdrom_ioctl(&di->viocd_info, bdev, mode, cmd, arg); | |
1da177e4 LT |
172 | } |
173 | ||
174 | static int viocd_blk_media_changed(struct gendisk *disk) | |
175 | { | |
176 | struct disk_info *di = disk->private_data; | |
177 | return cdrom_media_changed(&di->viocd_info); | |
178 | } | |
179 | ||
83d5cde4 | 180 | static const struct block_device_operations viocd_fops = { |
1da177e4 | 181 | .owner = THIS_MODULE, |
4e379ae6 AV |
182 | .open = viocd_blk_open, |
183 | .release = viocd_blk_release, | |
184 | .locked_ioctl = viocd_blk_ioctl, | |
1da177e4 LT |
185 | .media_changed = viocd_blk_media_changed, |
186 | }; | |
187 | ||
1da177e4 LT |
188 | static int viocd_open(struct cdrom_device_info *cdi, int purpose) |
189 | { | |
190 | struct disk_info *diskinfo = cdi->handle; | |
191 | int device_no = DEVICE_NR(diskinfo); | |
192 | HvLpEvent_Rc hvrc; | |
193 | struct viocd_waitevent we; | |
194 | ||
195 | init_completion(&we.com); | |
196 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
197 | HvLpEvent_Type_VirtualIo, | |
198 | viomajorsubtype_cdio | viocdopen, | |
199 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
200 | viopath_sourceinst(viopath_hostLp), | |
201 | viopath_targetinst(viopath_hostLp), | |
202 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
203 | 0, 0, 0); | |
204 | if (hvrc != 0) { | |
205 | printk(VIOCD_KERN_WARNING | |
206 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
207 | (int)hvrc); | |
208 | return -EIO; | |
209 | } | |
210 | ||
211 | wait_for_completion(&we.com); | |
212 | ||
213 | if (we.rc) { | |
214 | const struct vio_error_entry *err = | |
215 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
216 | printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on open: %s\n", | |
217 | we.rc, we.sub_result, err->msg); | |
218 | return -err->errno; | |
219 | } | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | static void viocd_release(struct cdrom_device_info *cdi) | |
225 | { | |
226 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
227 | HvLpEvent_Rc hvrc; | |
228 | ||
229 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
230 | HvLpEvent_Type_VirtualIo, | |
231 | viomajorsubtype_cdio | viocdclose, | |
232 | HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck, | |
233 | viopath_sourceinst(viopath_hostLp), | |
234 | viopath_targetinst(viopath_hostLp), 0, | |
235 | VIOVERSION << 16, ((u64)device_no << 48), 0, 0, 0); | |
236 | if (hvrc != 0) | |
237 | printk(VIOCD_KERN_WARNING | |
238 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
239 | (int)hvrc); | |
240 | } | |
241 | ||
242 | /* Send a read or write request to OS/400 */ | |
243 | static int send_request(struct request *req) | |
244 | { | |
245 | HvLpEvent_Rc hvrc; | |
246 | struct disk_info *diskinfo = req->rq_disk->private_data; | |
247 | u64 len; | |
248 | dma_addr_t dmaaddr; | |
249 | int direction; | |
250 | u16 cmd; | |
251 | struct scatterlist sg; | |
252 | ||
253 | BUG_ON(req->nr_phys_segments > 1); | |
254 | ||
255 | if (rq_data_dir(req) == READ) { | |
256 | direction = DMA_FROM_DEVICE; | |
257 | cmd = viomajorsubtype_cdio | viocdread; | |
258 | } else { | |
259 | direction = DMA_TO_DEVICE; | |
260 | cmd = viomajorsubtype_cdio | viocdwrite; | |
261 | } | |
262 | ||
3d1266c7 | 263 | sg_init_table(&sg, 1); |
1da177e4 LT |
264 | if (blk_rq_map_sg(req->q, req, &sg) == 0) { |
265 | printk(VIOCD_KERN_WARNING | |
266 | "error setting up scatter/gather list\n"); | |
267 | return -1; | |
268 | } | |
269 | ||
270 | if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) { | |
271 | printk(VIOCD_KERN_WARNING "error allocating sg tce\n"); | |
272 | return -1; | |
273 | } | |
274 | dmaaddr = sg_dma_address(&sg); | |
275 | len = sg_dma_len(&sg); | |
276 | ||
277 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
278 | HvLpEvent_Type_VirtualIo, cmd, | |
279 | HvLpEvent_AckInd_DoAck, | |
280 | HvLpEvent_AckType_ImmediateAck, | |
281 | viopath_sourceinst(viopath_hostLp), | |
282 | viopath_targetinst(viopath_hostLp), | |
283 | (u64)req, VIOVERSION << 16, | |
284 | ((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr, | |
83096ebf | 285 | (u64)blk_rq_pos(req) * 512, len, 0); |
1da177e4 LT |
286 | if (hvrc != HvLpEvent_Rc_Good) { |
287 | printk(VIOCD_KERN_WARNING "hv error on op %d\n", (int)hvrc); | |
288 | return -1; | |
289 | } | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
1da177e4 LT |
294 | static int rwreq; |
295 | ||
165125e1 | 296 | static void do_viocd_request(struct request_queue *q) |
1da177e4 LT |
297 | { |
298 | struct request *req; | |
299 | ||
9934c8c0 | 300 | while ((rwreq == 0) && ((req = blk_fetch_request(q)) != NULL)) { |
1da177e4 | 301 | if (!blk_fs_request(req)) |
40cbbb78 | 302 | __blk_end_request_all(req, -EIO); |
1da177e4 LT |
303 | else if (send_request(req) < 0) { |
304 | printk(VIOCD_KERN_WARNING | |
305 | "unable to send message to OS/400!"); | |
40cbbb78 | 306 | __blk_end_request_all(req, -EIO); |
1da177e4 LT |
307 | } else |
308 | rwreq++; | |
309 | } | |
310 | } | |
311 | ||
312 | static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr) | |
313 | { | |
314 | struct viocd_waitevent we; | |
315 | HvLpEvent_Rc hvrc; | |
316 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
317 | ||
318 | init_completion(&we.com); | |
319 | ||
320 | /* Send the open event to OS/400 */ | |
321 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
322 | HvLpEvent_Type_VirtualIo, | |
323 | viomajorsubtype_cdio | viocdcheck, | |
324 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
325 | viopath_sourceinst(viopath_hostLp), | |
326 | viopath_targetinst(viopath_hostLp), | |
327 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
328 | 0, 0, 0); | |
329 | if (hvrc != 0) { | |
330 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
331 | (int)hvrc); | |
332 | return -EIO; | |
333 | } | |
334 | ||
335 | wait_for_completion(&we.com); | |
336 | ||
337 | /* Check the return code. If bad, assume no change */ | |
338 | if (we.rc) { | |
339 | const struct vio_error_entry *err = | |
340 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
341 | printk(VIOCD_KERN_WARNING | |
342 | "bad rc %d:0x%04X on check_change: %s; Assuming no change\n", | |
343 | we.rc, we.sub_result, err->msg); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | return we.changed; | |
348 | } | |
349 | ||
350 | static int viocd_lock_door(struct cdrom_device_info *cdi, int locking) | |
351 | { | |
352 | HvLpEvent_Rc hvrc; | |
353 | u64 device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
354 | /* NOTE: flags is 1 or 0 so it won't overwrite the device_no */ | |
355 | u64 flags = !!locking; | |
356 | struct viocd_waitevent we; | |
357 | ||
358 | init_completion(&we.com); | |
359 | ||
360 | /* Send the lockdoor event to OS/400 */ | |
361 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
362 | HvLpEvent_Type_VirtualIo, | |
363 | viomajorsubtype_cdio | viocdlockdoor, | |
364 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
365 | viopath_sourceinst(viopath_hostLp), | |
366 | viopath_targetinst(viopath_hostLp), | |
367 | (u64)&we, VIOVERSION << 16, | |
368 | (device_no << 48) | (flags << 32), 0, 0, 0); | |
369 | if (hvrc != 0) { | |
370 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
371 | (int)hvrc); | |
372 | return -EIO; | |
373 | } | |
374 | ||
375 | wait_for_completion(&we.com); | |
376 | ||
377 | if (we.rc != 0) | |
378 | return -EIO; | |
379 | return 0; | |
380 | } | |
381 | ||
382 | static int viocd_packet(struct cdrom_device_info *cdi, | |
383 | struct packet_command *cgc) | |
384 | { | |
385 | unsigned int buflen = cgc->buflen; | |
386 | int ret = -EIO; | |
387 | ||
388 | switch (cgc->cmd[0]) { | |
389 | case GPCMD_READ_DISC_INFO: | |
390 | { | |
391 | disc_information *di = (disc_information *)cgc->buffer; | |
392 | ||
393 | if (buflen >= 2) { | |
394 | di->disc_information_length = cpu_to_be16(1); | |
395 | ret = 0; | |
396 | } | |
397 | if (buflen >= 3) | |
398 | di->erasable = | |
399 | (cdi->ops->capability & ~cdi->mask | |
400 | & (CDC_DVD_RAM | CDC_RAM)) != 0; | |
401 | } | |
402 | break; | |
9db29258 SR |
403 | case GPCMD_GET_CONFIGURATION: |
404 | if (cgc->cmd[3] == CDF_RWRT) { | |
405 | struct rwrt_feature_desc *rfd = (struct rwrt_feature_desc *)(cgc->buffer + sizeof(struct feature_header)); | |
406 | ||
407 | if ((buflen >= | |
408 | (sizeof(struct feature_header) + sizeof(*rfd))) && | |
409 | (cdi->ops->capability & ~cdi->mask | |
410 | & (CDC_DVD_RAM | CDC_RAM))) { | |
411 | rfd->feature_code = cpu_to_be16(CDF_RWRT); | |
412 | rfd->curr = 1; | |
413 | ret = 0; | |
414 | } | |
415 | } | |
416 | break; | |
1da177e4 LT |
417 | default: |
418 | if (cgc->sense) { | |
419 | /* indicate Unknown code */ | |
420 | cgc->sense->sense_key = 0x05; | |
421 | cgc->sense->asc = 0x20; | |
422 | cgc->sense->ascq = 0x00; | |
423 | } | |
424 | break; | |
425 | } | |
426 | ||
427 | cgc->stat = ret; | |
428 | return ret; | |
429 | } | |
430 | ||
431 | static void restart_all_queues(int first_index) | |
432 | { | |
433 | int i; | |
434 | ||
435 | for (i = first_index + 1; i < viocd_numdev; i++) | |
436 | if (viocd_diskinfo[i].viocd_disk) | |
437 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
438 | for (i = 0; i <= first_index; i++) | |
439 | if (viocd_diskinfo[i].viocd_disk) | |
440 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
441 | } | |
442 | ||
443 | /* This routine handles incoming CD LP events */ | |
444 | static void vio_handle_cd_event(struct HvLpEvent *event) | |
445 | { | |
446 | struct viocdlpevent *bevent; | |
447 | struct viocd_waitevent *pwe; | |
448 | struct disk_info *di; | |
449 | unsigned long flags; | |
450 | struct request *req; | |
451 | ||
452 | ||
453 | if (event == NULL) | |
454 | /* Notification that a partition went away! */ | |
455 | return; | |
456 | /* First, we should NEVER get an int here...only acks */ | |
677f8c0d | 457 | if (hvlpevent_is_int(event)) { |
1da177e4 LT |
458 | printk(VIOCD_KERN_WARNING |
459 | "Yikes! got an int in viocd event handler!\n"); | |
677f8c0d | 460 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
461 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
462 | HvCallEvent_ackLpEvent(event); | |
463 | } | |
464 | } | |
465 | ||
466 | bevent = (struct viocdlpevent *)event; | |
467 | ||
468 | switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) { | |
469 | case viocdopen: | |
470 | if (event->xRc == 0) { | |
471 | di = &viocd_diskinfo[bevent->disk]; | |
e1defc4f MP |
472 | blk_queue_logical_block_size(di->viocd_disk->queue, |
473 | bevent->block_size); | |
1da177e4 LT |
474 | set_capacity(di->viocd_disk, |
475 | bevent->media_size * | |
476 | bevent->block_size / 512); | |
477 | } | |
478 | /* FALLTHROUGH !! */ | |
1da177e4 LT |
479 | case viocdlockdoor: |
480 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
481 | return_complete: | |
482 | pwe->rc = event->xRc; | |
483 | pwe->sub_result = bevent->sub_result; | |
484 | complete(&pwe->com); | |
485 | break; | |
486 | ||
487 | case viocdcheck: | |
488 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
489 | pwe->changed = bevent->flags; | |
490 | goto return_complete; | |
491 | ||
492 | case viocdclose: | |
493 | break; | |
494 | ||
495 | case viocdwrite: | |
496 | case viocdread: | |
497 | /* | |
498 | * Since this is running in interrupt mode, we need to | |
499 | * make sure we're not stepping on any global I/O operations | |
500 | */ | |
501 | di = &viocd_diskinfo[bevent->disk]; | |
502 | spin_lock_irqsave(&viocd_reqlock, flags); | |
503 | dma_unmap_single(di->dev, bevent->token, bevent->len, | |
504 | ((event->xSubtype & VIOMINOR_SUBTYPE_MASK) == viocdread) | |
505 | ? DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
506 | req = (struct request *)bevent->event.xCorrelationToken; | |
507 | rwreq--; | |
508 | ||
509 | if (event->xRc != HvLpEvent_Rc_Good) { | |
510 | const struct vio_error_entry *err = | |
511 | vio_lookup_rc(viocd_err_table, | |
512 | bevent->sub_result); | |
513 | printk(VIOCD_KERN_WARNING "request %p failed " | |
514 | "with rc %d:0x%04X: %s\n", | |
515 | req, event->xRc, | |
516 | bevent->sub_result, err->msg); | |
40cbbb78 | 517 | __blk_end_request_all(req, -EIO); |
1da177e4 | 518 | } else |
40cbbb78 | 519 | __blk_end_request_all(req, 0); |
1da177e4 LT |
520 | |
521 | /* restart handling of incoming requests */ | |
522 | spin_unlock_irqrestore(&viocd_reqlock, flags); | |
523 | restart_all_queues(bevent->disk); | |
524 | break; | |
525 | ||
526 | default: | |
527 | printk(VIOCD_KERN_WARNING | |
528 | "message with invalid subtype %0x04X!\n", | |
529 | event->xSubtype & VIOMINOR_SUBTYPE_MASK); | |
677f8c0d | 530 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
531 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
532 | HvCallEvent_ackLpEvent(event); | |
533 | } | |
534 | } | |
535 | } | |
536 | ||
3e636f78 BP |
537 | static int viocd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, |
538 | void *arg) | |
539 | { | |
540 | return -EINVAL; | |
541 | } | |
542 | ||
1da177e4 LT |
543 | static struct cdrom_device_ops viocd_dops = { |
544 | .open = viocd_open, | |
545 | .release = viocd_release, | |
546 | .media_changed = viocd_media_changed, | |
547 | .lock_door = viocd_lock_door, | |
548 | .generic_packet = viocd_packet, | |
3e636f78 | 549 | .audio_ioctl = viocd_audio_ioctl, |
6a2900b6 | 550 | .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 |
551 | }; |
552 | ||
c7211927 | 553 | static int find_capability(const char *type) |
1da177e4 LT |
554 | { |
555 | struct capability_entry *entry; | |
556 | ||
557 | for(entry = capability_table; entry->type; ++entry) | |
558 | if(!strncmp(entry->type, type, 4)) | |
559 | break; | |
560 | return entry->capability; | |
561 | } | |
562 | ||
563 | static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
564 | { | |
565 | struct gendisk *gendisk; | |
566 | int deviceno; | |
567 | struct disk_info *d; | |
568 | struct cdrom_device_info *c; | |
1da177e4 | 569 | struct request_queue *q; |
b833b481 | 570 | struct device_node *node = vdev->dev.archdata.of_node; |
1da177e4 LT |
571 | |
572 | deviceno = vdev->unit_address; | |
d3375ea7 | 573 | if (deviceno >= VIOCD_MAX_CD) |
1da177e4 | 574 | return -ENODEV; |
b833b481 SR |
575 | if (!node) |
576 | return -ENODEV; | |
577 | ||
578 | if (deviceno >= viocd_numdev) | |
579 | viocd_numdev = deviceno + 1; | |
1da177e4 LT |
580 | |
581 | d = &viocd_diskinfo[deviceno]; | |
b833b481 SR |
582 | d->rsrcname = of_get_property(node, "linux,vio_rsrcname", NULL); |
583 | d->type = of_get_property(node, "linux,vio_type", NULL); | |
584 | d->model = of_get_property(node, "linux,vio_model", NULL); | |
585 | ||
1da177e4 | 586 | c = &d->viocd_info; |
1da177e4 LT |
587 | |
588 | c->ops = &viocd_dops; | |
589 | c->speed = 4; | |
590 | c->capacity = 1; | |
591 | c->handle = d; | |
b833b481 | 592 | c->mask = ~find_capability(d->type); |
1da177e4 LT |
593 | sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno); |
594 | ||
595 | if (register_cdrom(c) != 0) { | |
596 | printk(VIOCD_KERN_WARNING "Cannot register viocd CD-ROM %s!\n", | |
597 | c->name); | |
598 | goto out; | |
599 | } | |
600 | printk(VIOCD_KERN_INFO "cd %s is iSeries resource %10.10s " | |
601 | "type %4.4s, model %3.3s\n", | |
b833b481 | 602 | c->name, d->rsrcname, d->type, d->model); |
1da177e4 LT |
603 | q = blk_init_queue(do_viocd_request, &viocd_reqlock); |
604 | if (q == NULL) { | |
605 | printk(VIOCD_KERN_WARNING "Cannot allocate queue for %s!\n", | |
606 | c->name); | |
607 | goto out_unregister_cdrom; | |
608 | } | |
609 | gendisk = alloc_disk(1); | |
610 | if (gendisk == NULL) { | |
611 | printk(VIOCD_KERN_WARNING "Cannot create gendisk for %s!\n", | |
612 | c->name); | |
613 | goto out_cleanup_queue; | |
614 | } | |
615 | gendisk->major = VIOCD_MAJOR; | |
616 | gendisk->first_minor = deviceno; | |
617 | strncpy(gendisk->disk_name, c->name, | |
618 | sizeof(gendisk->disk_name)); | |
1da177e4 LT |
619 | blk_queue_max_hw_segments(q, 1); |
620 | blk_queue_max_phys_segments(q, 1); | |
621 | blk_queue_max_sectors(q, 4096 / 512); | |
622 | gendisk->queue = q; | |
623 | gendisk->fops = &viocd_fops; | |
624 | gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE; | |
625 | set_capacity(gendisk, 0); | |
626 | gendisk->private_data = d; | |
627 | d->viocd_disk = gendisk; | |
628 | d->dev = &vdev->dev; | |
629 | gendisk->driverfs_dev = d->dev; | |
630 | add_disk(gendisk); | |
631 | return 0; | |
632 | ||
633 | out_cleanup_queue: | |
634 | blk_cleanup_queue(q); | |
635 | out_unregister_cdrom: | |
636 | unregister_cdrom(c); | |
637 | out: | |
638 | return -ENODEV; | |
639 | } | |
640 | ||
641 | static int viocd_remove(struct vio_dev *vdev) | |
642 | { | |
643 | struct disk_info *d = &viocd_diskinfo[vdev->unit_address]; | |
644 | ||
0a0c4114 | 645 | unregister_cdrom(&d->viocd_info); |
1da177e4 LT |
646 | del_gendisk(d->viocd_disk); |
647 | blk_cleanup_queue(d->viocd_disk->queue); | |
648 | put_disk(d->viocd_disk); | |
649 | return 0; | |
650 | } | |
651 | ||
652 | /** | |
653 | * viocd_device_table: Used by vio.c to match devices that we | |
654 | * support. | |
655 | */ | |
656 | static struct vio_device_id viocd_device_table[] __devinitdata = { | |
de0fe3b8 | 657 | { "block", "IBM,iSeries-viocd" }, |
fb120da6 | 658 | { "", "" } |
1da177e4 | 659 | }; |
1da177e4 | 660 | MODULE_DEVICE_TABLE(vio, viocd_device_table); |
915124d8 | 661 | |
1da177e4 | 662 | static struct vio_driver viocd_driver = { |
1da177e4 LT |
663 | .id_table = viocd_device_table, |
664 | .probe = viocd_probe, | |
6fdf5392 SR |
665 | .remove = viocd_remove, |
666 | .driver = { | |
667 | .name = "viocd", | |
915124d8 | 668 | .owner = THIS_MODULE, |
6fdf5392 | 669 | } |
1da177e4 LT |
670 | }; |
671 | ||
672 | static int __init viocd_init(void) | |
673 | { | |
1da177e4 LT |
674 | int ret = 0; |
675 | ||
31c72ad0 SR |
676 | if (!firmware_has_feature(FW_FEATURE_ISERIES)) |
677 | return -ENODEV; | |
678 | ||
1da177e4 LT |
679 | if (viopath_hostLp == HvLpIndexInvalid) { |
680 | vio_set_hostlp(); | |
681 | /* If we don't have a host, bail out */ | |
682 | if (viopath_hostLp == HvLpIndexInvalid) | |
683 | return -ENODEV; | |
684 | } | |
685 | ||
686 | printk(VIOCD_KERN_INFO "vers " VIOCD_VERS ", hosting partition %d\n", | |
687 | viopath_hostLp); | |
688 | ||
689 | if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) { | |
690 | printk(VIOCD_KERN_WARNING "Unable to get major %d for %s\n", | |
691 | VIOCD_MAJOR, VIOCD_DEVICE); | |
692 | return -EIO; | |
693 | } | |
694 | ||
695 | ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio, | |
696 | MAX_CD_REQ + 2); | |
697 | if (ret) { | |
698 | printk(VIOCD_KERN_WARNING | |
699 | "error opening path to host partition %d\n", | |
700 | viopath_hostLp); | |
701 | goto out_unregister; | |
702 | } | |
703 | ||
704 | /* Initialize our request handler */ | |
705 | vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event); | |
706 | ||
1da177e4 LT |
707 | spin_lock_init(&viocd_reqlock); |
708 | ||
709 | ret = vio_register_driver(&viocd_driver); | |
710 | if (ret) | |
711 | goto out_free_info; | |
712 | ||
c7705f34 DL |
713 | proc_create("iSeries/viocd", S_IFREG|S_IRUGO, NULL, |
714 | &proc_viocd_operations); | |
1da177e4 LT |
715 | return 0; |
716 | ||
717 | out_free_info: | |
1da177e4 LT |
718 | vio_clearHandler(viomajorsubtype_cdio); |
719 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); | |
720 | out_unregister: | |
721 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
722 | return ret; | |
723 | } | |
724 | ||
725 | static void __exit viocd_exit(void) | |
726 | { | |
727 | remove_proc_entry("iSeries/viocd", NULL); | |
728 | vio_unregister_driver(&viocd_driver); | |
1da177e4 LT |
729 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); |
730 | vio_clearHandler(viomajorsubtype_cdio); | |
731 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
732 | } | |
733 | ||
734 | module_init(viocd_init); | |
735 | module_exit(viocd_exit); | |
736 | MODULE_LICENSE("GPL"); |