block: remove wrappers for request type/flags
[linux-2.6.git] / drivers / cdrom / viocd.c
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
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>
44 #include <linux/scatterlist.h>
45
46 #include <asm/vio.h>
47 #include <asm/iseries/hv_types.h>
48 #include <asm/iseries/hv_lp_event.h>
49 #include <asm/iseries/vio.h>
50 #include <asm/firmware.h>
51
52 #define VIOCD_DEVICE                    "iseries/vcd"
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
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
110 struct disk_info {
111         struct gendisk                  *viocd_disk;
112         struct cdrom_device_info        viocd_info;
113         struct device                   *dev;
114         const char                      *rsrcname;
115         const char                      *type;
116         const char                      *model;
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",
134                                 i, viocd_diskinfo[i].rsrcname,
135                                 viocd_diskinfo[i].type,
136                                 viocd_diskinfo[i].model);
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
146 static const struct file_operations proc_viocd_operations = {
147         .owner          = THIS_MODULE,
148         .open           = proc_viocd_open,
149         .read           = seq_read,
150         .llseek         = seq_lseek,
151         .release        = single_release,
152 };
153
154 static int viocd_blk_open(struct block_device *bdev, fmode_t mode)
155 {
156         struct disk_info *di = bdev->bd_disk->private_data;
157         return cdrom_open(&di->viocd_info, bdev, mode);
158 }
159
160 static int viocd_blk_release(struct gendisk *disk, fmode_t mode)
161 {
162         struct disk_info *di = disk->private_data;
163         cdrom_release(&di->viocd_info, mode);
164         return 0;
165 }
166
167 static int viocd_blk_ioctl(struct block_device *bdev, fmode_t mode,
168                 unsigned cmd, unsigned long arg)
169 {
170         struct disk_info *di = bdev->bd_disk->private_data;
171         return cdrom_ioctl(&di->viocd_info, bdev, mode, cmd, arg);
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
180 static const struct block_device_operations viocd_fops = {
181         .owner =                THIS_MODULE,
182         .open =                 viocd_blk_open,
183         .release =              viocd_blk_release,
184         .locked_ioctl =         viocd_blk_ioctl,
185         .media_changed =        viocd_blk_media_changed,
186 };
187
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
263         sg_init_table(&sg, 1);
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,
285                         (u64)blk_rq_pos(req) * 512, len, 0);
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
294 static int rwreq;
295
296 static void do_viocd_request(struct request_queue *q)
297 {
298         struct request *req;
299
300         while ((rwreq == 0) && ((req = blk_fetch_request(q)) != NULL)) {
301                 if (req->cmd_type != REQ_TYPE_FS)
302                         __blk_end_request_all(req, -EIO);
303                 else if (send_request(req) < 0) {
304                         printk(VIOCD_KERN_WARNING
305                                         "unable to send message to OS/400!");
306                         __blk_end_request_all(req, -EIO);
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;
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;
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 */
457         if (hvlpevent_is_int(event)) {
458                 printk(VIOCD_KERN_WARNING
459                                 "Yikes! got an int in viocd event handler!\n");
460                 if (hvlpevent_need_ack(event)) {
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];
472                         blk_queue_logical_block_size(di->viocd_disk->queue,
473                                                      bevent->block_size);
474                         set_capacity(di->viocd_disk,
475                                         bevent->media_size *
476                                         bevent->block_size / 512);
477                 }
478                 /* FALLTHROUGH !! */
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);
517                         __blk_end_request_all(req, -EIO);
518                 } else
519                         __blk_end_request_all(req, 0);
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);
530                 if (hvlpevent_need_ack(event)) {
531                         event->xRc = HvLpEvent_Rc_InvalidSubtype;
532                         HvCallEvent_ackLpEvent(event);
533                 }
534         }
535 }
536
537 static int viocd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
538                              void *arg)
539 {
540         return -EINVAL;
541 }
542
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,
549         .audio_ioctl = viocd_audio_ioctl,
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
551 };
552
553 static int find_capability(const char *type)
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;
569         struct request_queue *q;
570         struct device_node *node = vdev->dev.of_node;
571
572         deviceno = vdev->unit_address;
573         if (deviceno >= VIOCD_MAX_CD)
574                 return -ENODEV;
575         if (!node)
576                 return -ENODEV;
577
578         if (deviceno >= viocd_numdev)
579                 viocd_numdev = deviceno + 1;
580
581         d = &viocd_diskinfo[deviceno];
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
586         c = &d->viocd_info;
587
588         c->ops = &viocd_dops;
589         c->speed = 4;
590         c->capacity = 1;
591         c->handle = d;
592         c->mask = ~find_capability(d->type);
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",
602                         c->name, d->rsrcname, d->type, d->model);
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));
619         blk_queue_max_segments(q, 1);
620         blk_queue_max_hw_sectors(q, 4096 / 512);
621         gendisk->queue = q;
622         gendisk->fops = &viocd_fops;
623         gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE;
624         set_capacity(gendisk, 0);
625         gendisk->private_data = d;
626         d->viocd_disk = gendisk;
627         d->dev = &vdev->dev;
628         gendisk->driverfs_dev = d->dev;
629         add_disk(gendisk);
630         return 0;
631
632 out_cleanup_queue:
633         blk_cleanup_queue(q);
634 out_unregister_cdrom:
635         unregister_cdrom(c);
636 out:
637         return -ENODEV;
638 }
639
640 static int viocd_remove(struct vio_dev *vdev)
641 {
642         struct disk_info *d = &viocd_diskinfo[vdev->unit_address];
643
644         unregister_cdrom(&d->viocd_info);
645         del_gendisk(d->viocd_disk);
646         blk_cleanup_queue(d->viocd_disk->queue);
647         put_disk(d->viocd_disk);
648         return 0;
649 }
650
651 /**
652  * viocd_device_table: Used by vio.c to match devices that we
653  * support.
654  */
655 static struct vio_device_id viocd_device_table[] __devinitdata = {
656         { "block", "IBM,iSeries-viocd" },
657         { "", "" }
658 };
659 MODULE_DEVICE_TABLE(vio, viocd_device_table);
660
661 static struct vio_driver viocd_driver = {
662         .id_table = viocd_device_table,
663         .probe = viocd_probe,
664         .remove = viocd_remove,
665         .driver = {
666                 .name = "viocd",
667                 .owner = THIS_MODULE,
668         }
669 };
670
671 static int __init viocd_init(void)
672 {
673         int ret = 0;
674
675         if (!firmware_has_feature(FW_FEATURE_ISERIES))
676                 return -ENODEV;
677
678         if (viopath_hostLp == HvLpIndexInvalid) {
679                 vio_set_hostlp();
680                 /* If we don't have a host, bail out */
681                 if (viopath_hostLp == HvLpIndexInvalid)
682                         return -ENODEV;
683         }
684
685         printk(VIOCD_KERN_INFO "vers " VIOCD_VERS ", hosting partition %d\n",
686                         viopath_hostLp);
687
688         if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) {
689                 printk(VIOCD_KERN_WARNING "Unable to get major %d for %s\n",
690                                 VIOCD_MAJOR, VIOCD_DEVICE);
691                 return -EIO;
692         }
693
694         ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio,
695                         MAX_CD_REQ + 2);
696         if (ret) {
697                 printk(VIOCD_KERN_WARNING
698                                 "error opening path to host partition %d\n",
699                                 viopath_hostLp);
700                 goto out_unregister;
701         }
702
703         /* Initialize our request handler */
704         vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event);
705
706         spin_lock_init(&viocd_reqlock);
707
708         ret = vio_register_driver(&viocd_driver);
709         if (ret)
710                 goto out_free_info;
711
712         proc_create("iSeries/viocd", S_IFREG|S_IRUGO, NULL,
713                     &proc_viocd_operations);
714         return 0;
715
716 out_free_info:
717         vio_clearHandler(viomajorsubtype_cdio);
718         viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2);
719 out_unregister:
720         unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE);
721         return ret;
722 }
723
724 static void __exit viocd_exit(void)
725 {
726         remove_proc_entry("iSeries/viocd", NULL);
727         vio_unregister_driver(&viocd_driver);
728         viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2);
729         vio_clearHandler(viomajorsubtype_cdio);
730         unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE);
731 }
732
733 module_init(viocd_init);
734 module_exit(viocd_exit);
735 MODULE_LICENSE("GPL");