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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> | |
44 | ||
45 | #include <asm/bug.h> | |
46 | ||
47 | #include <asm/vio.h> | |
48 | #include <asm/scatterlist.h> | |
49 | #include <asm/iSeries/HvTypes.h> | |
50 | #include <asm/iSeries/HvLpEvent.h> | |
51 | #include <asm/iSeries/vio.h> | |
52 | ||
53 | #define VIOCD_DEVICE "iseries/vcd" | |
54 | #define VIOCD_DEVICE_DEVFS "iseries/vcd" | |
55 | ||
56 | #define VIOCD_VERS "1.06" | |
57 | ||
58 | #define VIOCD_KERN_WARNING KERN_WARNING "viocd: " | |
59 | #define VIOCD_KERN_INFO KERN_INFO "viocd: " | |
60 | ||
61 | struct viocdlpevent { | |
62 | struct HvLpEvent event; | |
63 | u32 reserved; | |
64 | u16 version; | |
65 | u16 sub_result; | |
66 | u16 disk; | |
67 | u16 flags; | |
68 | u32 token; | |
69 | u64 offset; /* On open, max number of disks */ | |
70 | u64 len; /* On open, size of the disk */ | |
71 | u32 block_size; /* Only set on open */ | |
72 | u32 media_size; /* Only set on open */ | |
73 | }; | |
74 | ||
75 | enum viocdsubtype { | |
76 | viocdopen = 0x0001, | |
77 | viocdclose = 0x0002, | |
78 | viocdread = 0x0003, | |
79 | viocdwrite = 0x0004, | |
80 | viocdlockdoor = 0x0005, | |
81 | viocdgetinfo = 0x0006, | |
82 | viocdcheck = 0x0007 | |
83 | }; | |
84 | ||
85 | /* | |
86 | * Should probably make this a module parameter....sigh | |
87 | */ | |
88 | #define VIOCD_MAX_CD HVMAXARCHITECTEDVIRTUALCDROMS | |
89 | ||
90 | static const struct vio_error_entry viocd_err_table[] = { | |
91 | {0x0201, EINVAL, "Invalid Range"}, | |
92 | {0x0202, EINVAL, "Invalid Token"}, | |
93 | {0x0203, EIO, "DMA Error"}, | |
94 | {0x0204, EIO, "Use Error"}, | |
95 | {0x0205, EIO, "Release Error"}, | |
96 | {0x0206, EINVAL, "Invalid CD"}, | |
97 | {0x020C, EROFS, "Read Only Device"}, | |
98 | {0x020D, ENOMEDIUM, "Changed or Missing Volume (or Varied Off?)"}, | |
99 | {0x020E, EIO, "Optical System Error (Varied Off?)"}, | |
100 | {0x02FF, EIO, "Internal Error"}, | |
101 | {0x3010, EIO, "Changed Volume"}, | |
102 | {0xC100, EIO, "Optical System Error"}, | |
103 | {0x0000, 0, NULL}, | |
104 | }; | |
105 | ||
106 | /* | |
107 | * This is the structure we use to exchange info between driver and interrupt | |
108 | * handler | |
109 | */ | |
110 | struct viocd_waitevent { | |
111 | struct completion com; | |
112 | int rc; | |
113 | u16 sub_result; | |
114 | int changed; | |
115 | }; | |
116 | ||
117 | /* this is a lookup table for the true capabilities of a device */ | |
118 | struct capability_entry { | |
119 | char *type; | |
120 | int capability; | |
121 | }; | |
122 | ||
123 | static struct capability_entry capability_table[] __initdata = { | |
124 | { "6330", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
125 | { "6331", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
126 | { "6333", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
127 | { "632A", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
128 | { "6321", CDC_LOCK }, | |
129 | { "632B", 0 }, | |
130 | { NULL , CDC_LOCK }, | |
131 | }; | |
132 | ||
133 | /* These are our internal structures for keeping track of devices */ | |
134 | static int viocd_numdev; | |
135 | ||
136 | struct cdrom_info { | |
137 | char rsrcname[10]; | |
138 | char type[4]; | |
139 | char model[3]; | |
140 | }; | |
141 | /* | |
142 | * This needs to be allocated since it is passed to the | |
143 | * Hypervisor and we may be a module. | |
144 | */ | |
145 | static struct cdrom_info *viocd_unitinfo; | |
146 | static dma_addr_t unitinfo_dmaaddr; | |
147 | ||
148 | struct disk_info { | |
149 | struct gendisk *viocd_disk; | |
150 | struct cdrom_device_info viocd_info; | |
151 | struct device *dev; | |
152 | }; | |
153 | static struct disk_info viocd_diskinfo[VIOCD_MAX_CD]; | |
154 | ||
155 | #define DEVICE_NR(di) ((di) - &viocd_diskinfo[0]) | |
156 | ||
157 | static spinlock_t viocd_reqlock; | |
158 | ||
159 | #define MAX_CD_REQ 1 | |
160 | ||
161 | /* procfs support */ | |
162 | static int proc_viocd_show(struct seq_file *m, void *v) | |
163 | { | |
164 | int i; | |
165 | ||
166 | for (i = 0; i < viocd_numdev; i++) { | |
167 | seq_printf(m, "viocd device %d is iSeries resource %10.10s" | |
168 | "type %4.4s, model %3.3s\n", | |
169 | i, viocd_unitinfo[i].rsrcname, | |
170 | viocd_unitinfo[i].type, | |
171 | viocd_unitinfo[i].model); | |
172 | } | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static int proc_viocd_open(struct inode *inode, struct file *file) | |
177 | { | |
178 | return single_open(file, proc_viocd_show, NULL); | |
179 | } | |
180 | ||
181 | static struct file_operations proc_viocd_operations = { | |
182 | .open = proc_viocd_open, | |
183 | .read = seq_read, | |
184 | .llseek = seq_lseek, | |
185 | .release = single_release, | |
186 | }; | |
187 | ||
188 | static int viocd_blk_open(struct inode *inode, struct file *file) | |
189 | { | |
190 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
191 | return cdrom_open(&di->viocd_info, inode, file); | |
192 | } | |
193 | ||
194 | static int viocd_blk_release(struct inode *inode, struct file *file) | |
195 | { | |
196 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
197 | return cdrom_release(&di->viocd_info, file); | |
198 | } | |
199 | ||
200 | static int viocd_blk_ioctl(struct inode *inode, struct file *file, | |
201 | unsigned cmd, unsigned long arg) | |
202 | { | |
203 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
204 | return cdrom_ioctl(file, &di->viocd_info, inode, cmd, arg); | |
205 | } | |
206 | ||
207 | static int viocd_blk_media_changed(struct gendisk *disk) | |
208 | { | |
209 | struct disk_info *di = disk->private_data; | |
210 | return cdrom_media_changed(&di->viocd_info); | |
211 | } | |
212 | ||
213 | struct block_device_operations viocd_fops = { | |
214 | .owner = THIS_MODULE, | |
215 | .open = viocd_blk_open, | |
216 | .release = viocd_blk_release, | |
217 | .ioctl = viocd_blk_ioctl, | |
218 | .media_changed = viocd_blk_media_changed, | |
219 | }; | |
220 | ||
221 | /* Get info on CD devices from OS/400 */ | |
222 | static void __init get_viocd_info(void) | |
223 | { | |
224 | HvLpEvent_Rc hvrc; | |
225 | int i; | |
226 | struct viocd_waitevent we; | |
227 | ||
228 | viocd_unitinfo = dma_alloc_coherent(iSeries_vio_dev, | |
229 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, | |
230 | &unitinfo_dmaaddr, GFP_ATOMIC); | |
231 | if (viocd_unitinfo == NULL) { | |
232 | printk(VIOCD_KERN_WARNING "error allocating unitinfo\n"); | |
233 | return; | |
234 | } | |
235 | ||
236 | memset(viocd_unitinfo, 0, sizeof(*viocd_unitinfo) * VIOCD_MAX_CD); | |
237 | ||
238 | init_completion(&we.com); | |
239 | ||
240 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
241 | HvLpEvent_Type_VirtualIo, | |
242 | viomajorsubtype_cdio | viocdgetinfo, | |
243 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
244 | viopath_sourceinst(viopath_hostLp), | |
245 | viopath_targetinst(viopath_hostLp), | |
246 | (u64)&we, VIOVERSION << 16, unitinfo_dmaaddr, 0, | |
247 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, 0); | |
248 | if (hvrc != HvLpEvent_Rc_Good) { | |
249 | printk(VIOCD_KERN_WARNING "cdrom error sending event. rc %d\n", | |
250 | (int)hvrc); | |
251 | goto error_ret; | |
252 | } | |
253 | ||
254 | wait_for_completion(&we.com); | |
255 | ||
256 | if (we.rc) { | |
257 | const struct vio_error_entry *err = | |
258 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
259 | printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on getinfo: %s\n", | |
260 | we.rc, we.sub_result, err->msg); | |
261 | goto error_ret; | |
262 | } | |
263 | ||
264 | for (i = 0; (i < VIOCD_MAX_CD) && viocd_unitinfo[i].rsrcname[0]; i++) | |
265 | viocd_numdev++; | |
266 | ||
267 | error_ret: | |
268 | if (viocd_numdev == 0) { | |
269 | dma_free_coherent(iSeries_vio_dev, | |
270 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, | |
271 | viocd_unitinfo, unitinfo_dmaaddr); | |
272 | viocd_unitinfo = NULL; | |
273 | } | |
274 | } | |
275 | ||
276 | static int viocd_open(struct cdrom_device_info *cdi, int purpose) | |
277 | { | |
278 | struct disk_info *diskinfo = cdi->handle; | |
279 | int device_no = DEVICE_NR(diskinfo); | |
280 | HvLpEvent_Rc hvrc; | |
281 | struct viocd_waitevent we; | |
282 | ||
283 | init_completion(&we.com); | |
284 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
285 | HvLpEvent_Type_VirtualIo, | |
286 | viomajorsubtype_cdio | viocdopen, | |
287 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
288 | viopath_sourceinst(viopath_hostLp), | |
289 | viopath_targetinst(viopath_hostLp), | |
290 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
291 | 0, 0, 0); | |
292 | if (hvrc != 0) { | |
293 | printk(VIOCD_KERN_WARNING | |
294 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
295 | (int)hvrc); | |
296 | return -EIO; | |
297 | } | |
298 | ||
299 | wait_for_completion(&we.com); | |
300 | ||
301 | if (we.rc) { | |
302 | const struct vio_error_entry *err = | |
303 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
304 | printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on open: %s\n", | |
305 | we.rc, we.sub_result, err->msg); | |
306 | return -err->errno; | |
307 | } | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | static void viocd_release(struct cdrom_device_info *cdi) | |
313 | { | |
314 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
315 | HvLpEvent_Rc hvrc; | |
316 | ||
317 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
318 | HvLpEvent_Type_VirtualIo, | |
319 | viomajorsubtype_cdio | viocdclose, | |
320 | HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck, | |
321 | viopath_sourceinst(viopath_hostLp), | |
322 | viopath_targetinst(viopath_hostLp), 0, | |
323 | VIOVERSION << 16, ((u64)device_no << 48), 0, 0, 0); | |
324 | if (hvrc != 0) | |
325 | printk(VIOCD_KERN_WARNING | |
326 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
327 | (int)hvrc); | |
328 | } | |
329 | ||
330 | /* Send a read or write request to OS/400 */ | |
331 | static int send_request(struct request *req) | |
332 | { | |
333 | HvLpEvent_Rc hvrc; | |
334 | struct disk_info *diskinfo = req->rq_disk->private_data; | |
335 | u64 len; | |
336 | dma_addr_t dmaaddr; | |
337 | int direction; | |
338 | u16 cmd; | |
339 | struct scatterlist sg; | |
340 | ||
341 | BUG_ON(req->nr_phys_segments > 1); | |
342 | ||
343 | if (rq_data_dir(req) == READ) { | |
344 | direction = DMA_FROM_DEVICE; | |
345 | cmd = viomajorsubtype_cdio | viocdread; | |
346 | } else { | |
347 | direction = DMA_TO_DEVICE; | |
348 | cmd = viomajorsubtype_cdio | viocdwrite; | |
349 | } | |
350 | ||
351 | if (blk_rq_map_sg(req->q, req, &sg) == 0) { | |
352 | printk(VIOCD_KERN_WARNING | |
353 | "error setting up scatter/gather list\n"); | |
354 | return -1; | |
355 | } | |
356 | ||
357 | if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) { | |
358 | printk(VIOCD_KERN_WARNING "error allocating sg tce\n"); | |
359 | return -1; | |
360 | } | |
361 | dmaaddr = sg_dma_address(&sg); | |
362 | len = sg_dma_len(&sg); | |
363 | ||
364 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
365 | HvLpEvent_Type_VirtualIo, cmd, | |
366 | HvLpEvent_AckInd_DoAck, | |
367 | HvLpEvent_AckType_ImmediateAck, | |
368 | viopath_sourceinst(viopath_hostLp), | |
369 | viopath_targetinst(viopath_hostLp), | |
370 | (u64)req, VIOVERSION << 16, | |
371 | ((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr, | |
372 | (u64)req->sector * 512, len, 0); | |
373 | if (hvrc != HvLpEvent_Rc_Good) { | |
374 | printk(VIOCD_KERN_WARNING "hv error on op %d\n", (int)hvrc); | |
375 | return -1; | |
376 | } | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | ||
382 | static int rwreq; | |
383 | ||
384 | static void do_viocd_request(request_queue_t *q) | |
385 | { | |
386 | struct request *req; | |
387 | ||
388 | while ((rwreq == 0) && ((req = elv_next_request(q)) != NULL)) { | |
389 | if (!blk_fs_request(req)) | |
390 | end_request(req, 0); | |
391 | else if (send_request(req) < 0) { | |
392 | printk(VIOCD_KERN_WARNING | |
393 | "unable to send message to OS/400!"); | |
394 | end_request(req, 0); | |
395 | } else | |
396 | rwreq++; | |
397 | } | |
398 | } | |
399 | ||
400 | static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr) | |
401 | { | |
402 | struct viocd_waitevent we; | |
403 | HvLpEvent_Rc hvrc; | |
404 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
405 | ||
406 | init_completion(&we.com); | |
407 | ||
408 | /* Send the open event to OS/400 */ | |
409 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
410 | HvLpEvent_Type_VirtualIo, | |
411 | viomajorsubtype_cdio | viocdcheck, | |
412 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
413 | viopath_sourceinst(viopath_hostLp), | |
414 | viopath_targetinst(viopath_hostLp), | |
415 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
416 | 0, 0, 0); | |
417 | if (hvrc != 0) { | |
418 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
419 | (int)hvrc); | |
420 | return -EIO; | |
421 | } | |
422 | ||
423 | wait_for_completion(&we.com); | |
424 | ||
425 | /* Check the return code. If bad, assume no change */ | |
426 | if (we.rc) { | |
427 | const struct vio_error_entry *err = | |
428 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
429 | printk(VIOCD_KERN_WARNING | |
430 | "bad rc %d:0x%04X on check_change: %s; Assuming no change\n", | |
431 | we.rc, we.sub_result, err->msg); | |
432 | return 0; | |
433 | } | |
434 | ||
435 | return we.changed; | |
436 | } | |
437 | ||
438 | static int viocd_lock_door(struct cdrom_device_info *cdi, int locking) | |
439 | { | |
440 | HvLpEvent_Rc hvrc; | |
441 | u64 device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
442 | /* NOTE: flags is 1 or 0 so it won't overwrite the device_no */ | |
443 | u64 flags = !!locking; | |
444 | struct viocd_waitevent we; | |
445 | ||
446 | init_completion(&we.com); | |
447 | ||
448 | /* Send the lockdoor event to OS/400 */ | |
449 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
450 | HvLpEvent_Type_VirtualIo, | |
451 | viomajorsubtype_cdio | viocdlockdoor, | |
452 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
453 | viopath_sourceinst(viopath_hostLp), | |
454 | viopath_targetinst(viopath_hostLp), | |
455 | (u64)&we, VIOVERSION << 16, | |
456 | (device_no << 48) | (flags << 32), 0, 0, 0); | |
457 | if (hvrc != 0) { | |
458 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
459 | (int)hvrc); | |
460 | return -EIO; | |
461 | } | |
462 | ||
463 | wait_for_completion(&we.com); | |
464 | ||
465 | if (we.rc != 0) | |
466 | return -EIO; | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static int viocd_packet(struct cdrom_device_info *cdi, | |
471 | struct packet_command *cgc) | |
472 | { | |
473 | unsigned int buflen = cgc->buflen; | |
474 | int ret = -EIO; | |
475 | ||
476 | switch (cgc->cmd[0]) { | |
477 | case GPCMD_READ_DISC_INFO: | |
478 | { | |
479 | disc_information *di = (disc_information *)cgc->buffer; | |
480 | ||
481 | if (buflen >= 2) { | |
482 | di->disc_information_length = cpu_to_be16(1); | |
483 | ret = 0; | |
484 | } | |
485 | if (buflen >= 3) | |
486 | di->erasable = | |
487 | (cdi->ops->capability & ~cdi->mask | |
488 | & (CDC_DVD_RAM | CDC_RAM)) != 0; | |
489 | } | |
490 | break; | |
9db29258 SR |
491 | case GPCMD_GET_CONFIGURATION: |
492 | if (cgc->cmd[3] == CDF_RWRT) { | |
493 | struct rwrt_feature_desc *rfd = (struct rwrt_feature_desc *)(cgc->buffer + sizeof(struct feature_header)); | |
494 | ||
495 | if ((buflen >= | |
496 | (sizeof(struct feature_header) + sizeof(*rfd))) && | |
497 | (cdi->ops->capability & ~cdi->mask | |
498 | & (CDC_DVD_RAM | CDC_RAM))) { | |
499 | rfd->feature_code = cpu_to_be16(CDF_RWRT); | |
500 | rfd->curr = 1; | |
501 | ret = 0; | |
502 | } | |
503 | } | |
504 | break; | |
1da177e4 LT |
505 | default: |
506 | if (cgc->sense) { | |
507 | /* indicate Unknown code */ | |
508 | cgc->sense->sense_key = 0x05; | |
509 | cgc->sense->asc = 0x20; | |
510 | cgc->sense->ascq = 0x00; | |
511 | } | |
512 | break; | |
513 | } | |
514 | ||
515 | cgc->stat = ret; | |
516 | return ret; | |
517 | } | |
518 | ||
519 | static void restart_all_queues(int first_index) | |
520 | { | |
521 | int i; | |
522 | ||
523 | for (i = first_index + 1; i < viocd_numdev; i++) | |
524 | if (viocd_diskinfo[i].viocd_disk) | |
525 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
526 | for (i = 0; i <= first_index; i++) | |
527 | if (viocd_diskinfo[i].viocd_disk) | |
528 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
529 | } | |
530 | ||
531 | /* This routine handles incoming CD LP events */ | |
532 | static void vio_handle_cd_event(struct HvLpEvent *event) | |
533 | { | |
534 | struct viocdlpevent *bevent; | |
535 | struct viocd_waitevent *pwe; | |
536 | struct disk_info *di; | |
537 | unsigned long flags; | |
538 | struct request *req; | |
539 | ||
540 | ||
541 | if (event == NULL) | |
542 | /* Notification that a partition went away! */ | |
543 | return; | |
544 | /* First, we should NEVER get an int here...only acks */ | |
545 | if (event->xFlags.xFunction == HvLpEvent_Function_Int) { | |
546 | printk(VIOCD_KERN_WARNING | |
547 | "Yikes! got an int in viocd event handler!\n"); | |
548 | if (event->xFlags.xAckInd == HvLpEvent_AckInd_DoAck) { | |
549 | event->xRc = HvLpEvent_Rc_InvalidSubtype; | |
550 | HvCallEvent_ackLpEvent(event); | |
551 | } | |
552 | } | |
553 | ||
554 | bevent = (struct viocdlpevent *)event; | |
555 | ||
556 | switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) { | |
557 | case viocdopen: | |
558 | if (event->xRc == 0) { | |
559 | di = &viocd_diskinfo[bevent->disk]; | |
560 | blk_queue_hardsect_size(di->viocd_disk->queue, | |
561 | bevent->block_size); | |
562 | set_capacity(di->viocd_disk, | |
563 | bevent->media_size * | |
564 | bevent->block_size / 512); | |
565 | } | |
566 | /* FALLTHROUGH !! */ | |
567 | case viocdgetinfo: | |
568 | case viocdlockdoor: | |
569 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
570 | return_complete: | |
571 | pwe->rc = event->xRc; | |
572 | pwe->sub_result = bevent->sub_result; | |
573 | complete(&pwe->com); | |
574 | break; | |
575 | ||
576 | case viocdcheck: | |
577 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
578 | pwe->changed = bevent->flags; | |
579 | goto return_complete; | |
580 | ||
581 | case viocdclose: | |
582 | break; | |
583 | ||
584 | case viocdwrite: | |
585 | case viocdread: | |
586 | /* | |
587 | * Since this is running in interrupt mode, we need to | |
588 | * make sure we're not stepping on any global I/O operations | |
589 | */ | |
590 | di = &viocd_diskinfo[bevent->disk]; | |
591 | spin_lock_irqsave(&viocd_reqlock, flags); | |
592 | dma_unmap_single(di->dev, bevent->token, bevent->len, | |
593 | ((event->xSubtype & VIOMINOR_SUBTYPE_MASK) == viocdread) | |
594 | ? DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
595 | req = (struct request *)bevent->event.xCorrelationToken; | |
596 | rwreq--; | |
597 | ||
598 | if (event->xRc != HvLpEvent_Rc_Good) { | |
599 | const struct vio_error_entry *err = | |
600 | vio_lookup_rc(viocd_err_table, | |
601 | bevent->sub_result); | |
602 | printk(VIOCD_KERN_WARNING "request %p failed " | |
603 | "with rc %d:0x%04X: %s\n", | |
604 | req, event->xRc, | |
605 | bevent->sub_result, err->msg); | |
606 | end_request(req, 0); | |
607 | } else | |
608 | end_request(req, 1); | |
609 | ||
610 | /* restart handling of incoming requests */ | |
611 | spin_unlock_irqrestore(&viocd_reqlock, flags); | |
612 | restart_all_queues(bevent->disk); | |
613 | break; | |
614 | ||
615 | default: | |
616 | printk(VIOCD_KERN_WARNING | |
617 | "message with invalid subtype %0x04X!\n", | |
618 | event->xSubtype & VIOMINOR_SUBTYPE_MASK); | |
619 | if (event->xFlags.xAckInd == HvLpEvent_AckInd_DoAck) { | |
620 | event->xRc = HvLpEvent_Rc_InvalidSubtype; | |
621 | HvCallEvent_ackLpEvent(event); | |
622 | } | |
623 | } | |
624 | } | |
625 | ||
626 | static struct cdrom_device_ops viocd_dops = { | |
627 | .open = viocd_open, | |
628 | .release = viocd_release, | |
629 | .media_changed = viocd_media_changed, | |
630 | .lock_door = viocd_lock_door, | |
631 | .generic_packet = viocd_packet, | |
632 | .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_IOCTLS | CDC_DRIVE_STATUS | CDC_GENERIC_PACKET | CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_RAM | |
633 | }; | |
634 | ||
635 | static int __init find_capability(const char *type) | |
636 | { | |
637 | struct capability_entry *entry; | |
638 | ||
639 | for(entry = capability_table; entry->type; ++entry) | |
640 | if(!strncmp(entry->type, type, 4)) | |
641 | break; | |
642 | return entry->capability; | |
643 | } | |
644 | ||
645 | static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
646 | { | |
647 | struct gendisk *gendisk; | |
648 | int deviceno; | |
649 | struct disk_info *d; | |
650 | struct cdrom_device_info *c; | |
651 | struct cdrom_info *ci; | |
652 | struct request_queue *q; | |
653 | ||
654 | deviceno = vdev->unit_address; | |
655 | if (deviceno >= viocd_numdev) | |
656 | return -ENODEV; | |
657 | ||
658 | d = &viocd_diskinfo[deviceno]; | |
659 | c = &d->viocd_info; | |
660 | ci = &viocd_unitinfo[deviceno]; | |
661 | ||
662 | c->ops = &viocd_dops; | |
663 | c->speed = 4; | |
664 | c->capacity = 1; | |
665 | c->handle = d; | |
666 | c->mask = ~find_capability(ci->type); | |
667 | sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno); | |
668 | ||
669 | if (register_cdrom(c) != 0) { | |
670 | printk(VIOCD_KERN_WARNING "Cannot register viocd CD-ROM %s!\n", | |
671 | c->name); | |
672 | goto out; | |
673 | } | |
674 | printk(VIOCD_KERN_INFO "cd %s is iSeries resource %10.10s " | |
675 | "type %4.4s, model %3.3s\n", | |
676 | c->name, ci->rsrcname, ci->type, ci->model); | |
677 | q = blk_init_queue(do_viocd_request, &viocd_reqlock); | |
678 | if (q == NULL) { | |
679 | printk(VIOCD_KERN_WARNING "Cannot allocate queue for %s!\n", | |
680 | c->name); | |
681 | goto out_unregister_cdrom; | |
682 | } | |
683 | gendisk = alloc_disk(1); | |
684 | if (gendisk == NULL) { | |
685 | printk(VIOCD_KERN_WARNING "Cannot create gendisk for %s!\n", | |
686 | c->name); | |
687 | goto out_cleanup_queue; | |
688 | } | |
689 | gendisk->major = VIOCD_MAJOR; | |
690 | gendisk->first_minor = deviceno; | |
691 | strncpy(gendisk->disk_name, c->name, | |
692 | sizeof(gendisk->disk_name)); | |
693 | snprintf(gendisk->devfs_name, sizeof(gendisk->devfs_name), | |
694 | VIOCD_DEVICE_DEVFS "%d", deviceno); | |
695 | blk_queue_max_hw_segments(q, 1); | |
696 | blk_queue_max_phys_segments(q, 1); | |
697 | blk_queue_max_sectors(q, 4096 / 512); | |
698 | gendisk->queue = q; | |
699 | gendisk->fops = &viocd_fops; | |
700 | gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE; | |
701 | set_capacity(gendisk, 0); | |
702 | gendisk->private_data = d; | |
703 | d->viocd_disk = gendisk; | |
704 | d->dev = &vdev->dev; | |
705 | gendisk->driverfs_dev = d->dev; | |
706 | add_disk(gendisk); | |
707 | return 0; | |
708 | ||
709 | out_cleanup_queue: | |
710 | blk_cleanup_queue(q); | |
711 | out_unregister_cdrom: | |
712 | unregister_cdrom(c); | |
713 | out: | |
714 | return -ENODEV; | |
715 | } | |
716 | ||
717 | static int viocd_remove(struct vio_dev *vdev) | |
718 | { | |
719 | struct disk_info *d = &viocd_diskinfo[vdev->unit_address]; | |
720 | ||
721 | if (unregister_cdrom(&d->viocd_info) != 0) | |
722 | printk(VIOCD_KERN_WARNING | |
723 | "Cannot unregister viocd CD-ROM %s!\n", | |
724 | d->viocd_info.name); | |
725 | del_gendisk(d->viocd_disk); | |
726 | blk_cleanup_queue(d->viocd_disk->queue); | |
727 | put_disk(d->viocd_disk); | |
728 | return 0; | |
729 | } | |
730 | ||
731 | /** | |
732 | * viocd_device_table: Used by vio.c to match devices that we | |
733 | * support. | |
734 | */ | |
735 | static struct vio_device_id viocd_device_table[] __devinitdata = { | |
736 | { "viocd", "" }, | |
fb120da6 | 737 | { "", "" } |
1da177e4 | 738 | }; |
1da177e4 | 739 | MODULE_DEVICE_TABLE(vio, viocd_device_table); |
915124d8 | 740 | |
1da177e4 | 741 | static struct vio_driver viocd_driver = { |
1da177e4 LT |
742 | .id_table = viocd_device_table, |
743 | .probe = viocd_probe, | |
6fdf5392 SR |
744 | .remove = viocd_remove, |
745 | .driver = { | |
746 | .name = "viocd", | |
915124d8 | 747 | .owner = THIS_MODULE, |
6fdf5392 | 748 | } |
1da177e4 LT |
749 | }; |
750 | ||
751 | static int __init viocd_init(void) | |
752 | { | |
753 | struct proc_dir_entry *e; | |
754 | int ret = 0; | |
755 | ||
756 | if (viopath_hostLp == HvLpIndexInvalid) { | |
757 | vio_set_hostlp(); | |
758 | /* If we don't have a host, bail out */ | |
759 | if (viopath_hostLp == HvLpIndexInvalid) | |
760 | return -ENODEV; | |
761 | } | |
762 | ||
763 | printk(VIOCD_KERN_INFO "vers " VIOCD_VERS ", hosting partition %d\n", | |
764 | viopath_hostLp); | |
765 | ||
766 | if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) { | |
767 | printk(VIOCD_KERN_WARNING "Unable to get major %d for %s\n", | |
768 | VIOCD_MAJOR, VIOCD_DEVICE); | |
769 | return -EIO; | |
770 | } | |
771 | ||
772 | ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio, | |
773 | MAX_CD_REQ + 2); | |
774 | if (ret) { | |
775 | printk(VIOCD_KERN_WARNING | |
776 | "error opening path to host partition %d\n", | |
777 | viopath_hostLp); | |
778 | goto out_unregister; | |
779 | } | |
780 | ||
781 | /* Initialize our request handler */ | |
782 | vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event); | |
783 | ||
784 | get_viocd_info(); | |
785 | ||
786 | spin_lock_init(&viocd_reqlock); | |
787 | ||
788 | ret = vio_register_driver(&viocd_driver); | |
789 | if (ret) | |
790 | goto out_free_info; | |
791 | ||
792 | e = create_proc_entry("iSeries/viocd", S_IFREG|S_IRUGO, NULL); | |
793 | if (e) { | |
794 | e->owner = THIS_MODULE; | |
795 | e->proc_fops = &proc_viocd_operations; | |
796 | } | |
797 | ||
798 | return 0; | |
799 | ||
800 | out_free_info: | |
801 | dma_free_coherent(iSeries_vio_dev, | |
802 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, | |
803 | viocd_unitinfo, unitinfo_dmaaddr); | |
804 | vio_clearHandler(viomajorsubtype_cdio); | |
805 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); | |
806 | out_unregister: | |
807 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
808 | return ret; | |
809 | } | |
810 | ||
811 | static void __exit viocd_exit(void) | |
812 | { | |
813 | remove_proc_entry("iSeries/viocd", NULL); | |
814 | vio_unregister_driver(&viocd_driver); | |
815 | if (viocd_unitinfo != NULL) | |
816 | dma_free_coherent(iSeries_vio_dev, | |
817 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, | |
818 | viocd_unitinfo, unitinfo_dmaaddr); | |
819 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); | |
820 | vio_clearHandler(viomajorsubtype_cdio); | |
821 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
822 | } | |
823 | ||
824 | module_init(viocd_init); | |
825 | module_exit(viocd_exit); | |
826 | MODULE_LICENSE("GPL"); |