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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> | |
44 | ||
1da177e4 LT |
45 | #include <asm/vio.h> |
46 | #include <asm/scatterlist.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> |
1da177e4 LT |
50 | |
51 | #define VIOCD_DEVICE "iseries/vcd" | |
1da177e4 LT |
52 | |
53 | #define VIOCD_VERS "1.06" | |
54 | ||
55 | #define VIOCD_KERN_WARNING KERN_WARNING "viocd: " | |
56 | #define VIOCD_KERN_INFO KERN_INFO "viocd: " | |
57 | ||
58 | struct viocdlpevent { | |
59 | struct HvLpEvent event; | |
60 | u32 reserved; | |
61 | u16 version; | |
62 | u16 sub_result; | |
63 | u16 disk; | |
64 | u16 flags; | |
65 | u32 token; | |
66 | u64 offset; /* On open, max number of disks */ | |
67 | u64 len; /* On open, size of the disk */ | |
68 | u32 block_size; /* Only set on open */ | |
69 | u32 media_size; /* Only set on open */ | |
70 | }; | |
71 | ||
72 | enum viocdsubtype { | |
73 | viocdopen = 0x0001, | |
74 | viocdclose = 0x0002, | |
75 | viocdread = 0x0003, | |
76 | viocdwrite = 0x0004, | |
77 | viocdlockdoor = 0x0005, | |
78 | viocdgetinfo = 0x0006, | |
79 | viocdcheck = 0x0007 | |
80 | }; | |
81 | ||
82 | /* | |
83 | * Should probably make this a module parameter....sigh | |
84 | */ | |
85 | #define VIOCD_MAX_CD HVMAXARCHITECTEDVIRTUALCDROMS | |
86 | ||
87 | static const struct vio_error_entry viocd_err_table[] = { | |
88 | {0x0201, EINVAL, "Invalid Range"}, | |
89 | {0x0202, EINVAL, "Invalid Token"}, | |
90 | {0x0203, EIO, "DMA Error"}, | |
91 | {0x0204, EIO, "Use Error"}, | |
92 | {0x0205, EIO, "Release Error"}, | |
93 | {0x0206, EINVAL, "Invalid CD"}, | |
94 | {0x020C, EROFS, "Read Only Device"}, | |
95 | {0x020D, ENOMEDIUM, "Changed or Missing Volume (or Varied Off?)"}, | |
96 | {0x020E, EIO, "Optical System Error (Varied Off?)"}, | |
97 | {0x02FF, EIO, "Internal Error"}, | |
98 | {0x3010, EIO, "Changed Volume"}, | |
99 | {0xC100, EIO, "Optical System Error"}, | |
100 | {0x0000, 0, NULL}, | |
101 | }; | |
102 | ||
103 | /* | |
104 | * This is the structure we use to exchange info between driver and interrupt | |
105 | * handler | |
106 | */ | |
107 | struct viocd_waitevent { | |
108 | struct completion com; | |
109 | int rc; | |
110 | u16 sub_result; | |
111 | int changed; | |
112 | }; | |
113 | ||
114 | /* this is a lookup table for the true capabilities of a device */ | |
115 | struct capability_entry { | |
116 | char *type; | |
117 | int capability; | |
118 | }; | |
119 | ||
120 | static struct capability_entry capability_table[] __initdata = { | |
121 | { "6330", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
122 | { "6331", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
123 | { "6333", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
124 | { "632A", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
125 | { "6321", CDC_LOCK }, | |
126 | { "632B", 0 }, | |
127 | { NULL , CDC_LOCK }, | |
128 | }; | |
129 | ||
130 | /* These are our internal structures for keeping track of devices */ | |
131 | static int viocd_numdev; | |
132 | ||
133 | struct cdrom_info { | |
134 | char rsrcname[10]; | |
135 | char type[4]; | |
136 | char model[3]; | |
137 | }; | |
138 | /* | |
139 | * This needs to be allocated since it is passed to the | |
140 | * Hypervisor and we may be a module. | |
141 | */ | |
142 | static struct cdrom_info *viocd_unitinfo; | |
143 | static dma_addr_t unitinfo_dmaaddr; | |
144 | ||
145 | struct disk_info { | |
146 | struct gendisk *viocd_disk; | |
147 | struct cdrom_device_info viocd_info; | |
148 | struct device *dev; | |
149 | }; | |
150 | static struct disk_info viocd_diskinfo[VIOCD_MAX_CD]; | |
151 | ||
152 | #define DEVICE_NR(di) ((di) - &viocd_diskinfo[0]) | |
153 | ||
154 | static spinlock_t viocd_reqlock; | |
155 | ||
156 | #define MAX_CD_REQ 1 | |
157 | ||
158 | /* procfs support */ | |
159 | static int proc_viocd_show(struct seq_file *m, void *v) | |
160 | { | |
161 | int i; | |
162 | ||
163 | for (i = 0; i < viocd_numdev; i++) { | |
164 | seq_printf(m, "viocd device %d is iSeries resource %10.10s" | |
165 | "type %4.4s, model %3.3s\n", | |
166 | i, viocd_unitinfo[i].rsrcname, | |
167 | viocd_unitinfo[i].type, | |
168 | viocd_unitinfo[i].model); | |
169 | } | |
170 | return 0; | |
171 | } | |
172 | ||
173 | static int proc_viocd_open(struct inode *inode, struct file *file) | |
174 | { | |
175 | return single_open(file, proc_viocd_show, NULL); | |
176 | } | |
177 | ||
178 | static struct file_operations proc_viocd_operations = { | |
179 | .open = proc_viocd_open, | |
180 | .read = seq_read, | |
181 | .llseek = seq_lseek, | |
182 | .release = single_release, | |
183 | }; | |
184 | ||
185 | static int viocd_blk_open(struct inode *inode, struct file *file) | |
186 | { | |
187 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
188 | return cdrom_open(&di->viocd_info, inode, file); | |
189 | } | |
190 | ||
191 | static int viocd_blk_release(struct inode *inode, struct file *file) | |
192 | { | |
193 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
194 | return cdrom_release(&di->viocd_info, file); | |
195 | } | |
196 | ||
197 | static int viocd_blk_ioctl(struct inode *inode, struct file *file, | |
198 | unsigned cmd, unsigned long arg) | |
199 | { | |
200 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
201 | return cdrom_ioctl(file, &di->viocd_info, inode, cmd, arg); | |
202 | } | |
203 | ||
204 | static int viocd_blk_media_changed(struct gendisk *disk) | |
205 | { | |
206 | struct disk_info *di = disk->private_data; | |
207 | return cdrom_media_changed(&di->viocd_info); | |
208 | } | |
209 | ||
210 | struct block_device_operations viocd_fops = { | |
211 | .owner = THIS_MODULE, | |
212 | .open = viocd_blk_open, | |
213 | .release = viocd_blk_release, | |
214 | .ioctl = viocd_blk_ioctl, | |
215 | .media_changed = viocd_blk_media_changed, | |
216 | }; | |
217 | ||
218 | /* Get info on CD devices from OS/400 */ | |
219 | static void __init get_viocd_info(void) | |
220 | { | |
221 | HvLpEvent_Rc hvrc; | |
222 | int i; | |
223 | struct viocd_waitevent we; | |
224 | ||
225 | viocd_unitinfo = dma_alloc_coherent(iSeries_vio_dev, | |
226 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, | |
227 | &unitinfo_dmaaddr, GFP_ATOMIC); | |
228 | if (viocd_unitinfo == NULL) { | |
229 | printk(VIOCD_KERN_WARNING "error allocating unitinfo\n"); | |
230 | return; | |
231 | } | |
232 | ||
233 | memset(viocd_unitinfo, 0, sizeof(*viocd_unitinfo) * VIOCD_MAX_CD); | |
234 | ||
235 | init_completion(&we.com); | |
236 | ||
237 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
238 | HvLpEvent_Type_VirtualIo, | |
239 | viomajorsubtype_cdio | viocdgetinfo, | |
240 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
241 | viopath_sourceinst(viopath_hostLp), | |
242 | viopath_targetinst(viopath_hostLp), | |
243 | (u64)&we, VIOVERSION << 16, unitinfo_dmaaddr, 0, | |
244 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, 0); | |
245 | if (hvrc != HvLpEvent_Rc_Good) { | |
246 | printk(VIOCD_KERN_WARNING "cdrom error sending event. rc %d\n", | |
247 | (int)hvrc); | |
248 | goto error_ret; | |
249 | } | |
250 | ||
251 | wait_for_completion(&we.com); | |
252 | ||
253 | if (we.rc) { | |
254 | const struct vio_error_entry *err = | |
255 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
256 | printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on getinfo: %s\n", | |
257 | we.rc, we.sub_result, err->msg); | |
258 | goto error_ret; | |
259 | } | |
260 | ||
261 | for (i = 0; (i < VIOCD_MAX_CD) && viocd_unitinfo[i].rsrcname[0]; i++) | |
262 | viocd_numdev++; | |
263 | ||
264 | error_ret: | |
265 | if (viocd_numdev == 0) { | |
266 | dma_free_coherent(iSeries_vio_dev, | |
267 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, | |
268 | viocd_unitinfo, unitinfo_dmaaddr); | |
269 | viocd_unitinfo = NULL; | |
270 | } | |
271 | } | |
272 | ||
273 | static int viocd_open(struct cdrom_device_info *cdi, int purpose) | |
274 | { | |
275 | struct disk_info *diskinfo = cdi->handle; | |
276 | int device_no = DEVICE_NR(diskinfo); | |
277 | HvLpEvent_Rc hvrc; | |
278 | struct viocd_waitevent we; | |
279 | ||
280 | init_completion(&we.com); | |
281 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
282 | HvLpEvent_Type_VirtualIo, | |
283 | viomajorsubtype_cdio | viocdopen, | |
284 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
285 | viopath_sourceinst(viopath_hostLp), | |
286 | viopath_targetinst(viopath_hostLp), | |
287 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
288 | 0, 0, 0); | |
289 | if (hvrc != 0) { | |
290 | printk(VIOCD_KERN_WARNING | |
291 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
292 | (int)hvrc); | |
293 | return -EIO; | |
294 | } | |
295 | ||
296 | wait_for_completion(&we.com); | |
297 | ||
298 | if (we.rc) { | |
299 | const struct vio_error_entry *err = | |
300 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
301 | printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on open: %s\n", | |
302 | we.rc, we.sub_result, err->msg); | |
303 | return -err->errno; | |
304 | } | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | static void viocd_release(struct cdrom_device_info *cdi) | |
310 | { | |
311 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
312 | HvLpEvent_Rc hvrc; | |
313 | ||
314 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
315 | HvLpEvent_Type_VirtualIo, | |
316 | viomajorsubtype_cdio | viocdclose, | |
317 | HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck, | |
318 | viopath_sourceinst(viopath_hostLp), | |
319 | viopath_targetinst(viopath_hostLp), 0, | |
320 | VIOVERSION << 16, ((u64)device_no << 48), 0, 0, 0); | |
321 | if (hvrc != 0) | |
322 | printk(VIOCD_KERN_WARNING | |
323 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
324 | (int)hvrc); | |
325 | } | |
326 | ||
327 | /* Send a read or write request to OS/400 */ | |
328 | static int send_request(struct request *req) | |
329 | { | |
330 | HvLpEvent_Rc hvrc; | |
331 | struct disk_info *diskinfo = req->rq_disk->private_data; | |
332 | u64 len; | |
333 | dma_addr_t dmaaddr; | |
334 | int direction; | |
335 | u16 cmd; | |
336 | struct scatterlist sg; | |
337 | ||
338 | BUG_ON(req->nr_phys_segments > 1); | |
339 | ||
340 | if (rq_data_dir(req) == READ) { | |
341 | direction = DMA_FROM_DEVICE; | |
342 | cmd = viomajorsubtype_cdio | viocdread; | |
343 | } else { | |
344 | direction = DMA_TO_DEVICE; | |
345 | cmd = viomajorsubtype_cdio | viocdwrite; | |
346 | } | |
347 | ||
348 | if (blk_rq_map_sg(req->q, req, &sg) == 0) { | |
349 | printk(VIOCD_KERN_WARNING | |
350 | "error setting up scatter/gather list\n"); | |
351 | return -1; | |
352 | } | |
353 | ||
354 | if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) { | |
355 | printk(VIOCD_KERN_WARNING "error allocating sg tce\n"); | |
356 | return -1; | |
357 | } | |
358 | dmaaddr = sg_dma_address(&sg); | |
359 | len = sg_dma_len(&sg); | |
360 | ||
361 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
362 | HvLpEvent_Type_VirtualIo, cmd, | |
363 | HvLpEvent_AckInd_DoAck, | |
364 | HvLpEvent_AckType_ImmediateAck, | |
365 | viopath_sourceinst(viopath_hostLp), | |
366 | viopath_targetinst(viopath_hostLp), | |
367 | (u64)req, VIOVERSION << 16, | |
368 | ((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr, | |
369 | (u64)req->sector * 512, len, 0); | |
370 | if (hvrc != HvLpEvent_Rc_Good) { | |
371 | printk(VIOCD_KERN_WARNING "hv error on op %d\n", (int)hvrc); | |
372 | return -1; | |
373 | } | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | ||
379 | static int rwreq; | |
380 | ||
381 | static void do_viocd_request(request_queue_t *q) | |
382 | { | |
383 | struct request *req; | |
384 | ||
385 | while ((rwreq == 0) && ((req = elv_next_request(q)) != NULL)) { | |
386 | if (!blk_fs_request(req)) | |
387 | end_request(req, 0); | |
388 | else if (send_request(req) < 0) { | |
389 | printk(VIOCD_KERN_WARNING | |
390 | "unable to send message to OS/400!"); | |
391 | end_request(req, 0); | |
392 | } else | |
393 | rwreq++; | |
394 | } | |
395 | } | |
396 | ||
397 | static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr) | |
398 | { | |
399 | struct viocd_waitevent we; | |
400 | HvLpEvent_Rc hvrc; | |
401 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
402 | ||
403 | init_completion(&we.com); | |
404 | ||
405 | /* Send the open event to OS/400 */ | |
406 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
407 | HvLpEvent_Type_VirtualIo, | |
408 | viomajorsubtype_cdio | viocdcheck, | |
409 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
410 | viopath_sourceinst(viopath_hostLp), | |
411 | viopath_targetinst(viopath_hostLp), | |
412 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
413 | 0, 0, 0); | |
414 | if (hvrc != 0) { | |
415 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
416 | (int)hvrc); | |
417 | return -EIO; | |
418 | } | |
419 | ||
420 | wait_for_completion(&we.com); | |
421 | ||
422 | /* Check the return code. If bad, assume no change */ | |
423 | if (we.rc) { | |
424 | const struct vio_error_entry *err = | |
425 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
426 | printk(VIOCD_KERN_WARNING | |
427 | "bad rc %d:0x%04X on check_change: %s; Assuming no change\n", | |
428 | we.rc, we.sub_result, err->msg); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | return we.changed; | |
433 | } | |
434 | ||
435 | static int viocd_lock_door(struct cdrom_device_info *cdi, int locking) | |
436 | { | |
437 | HvLpEvent_Rc hvrc; | |
438 | u64 device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
439 | /* NOTE: flags is 1 or 0 so it won't overwrite the device_no */ | |
440 | u64 flags = !!locking; | |
441 | struct viocd_waitevent we; | |
442 | ||
443 | init_completion(&we.com); | |
444 | ||
445 | /* Send the lockdoor event to OS/400 */ | |
446 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
447 | HvLpEvent_Type_VirtualIo, | |
448 | viomajorsubtype_cdio | viocdlockdoor, | |
449 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
450 | viopath_sourceinst(viopath_hostLp), | |
451 | viopath_targetinst(viopath_hostLp), | |
452 | (u64)&we, VIOVERSION << 16, | |
453 | (device_no << 48) | (flags << 32), 0, 0, 0); | |
454 | if (hvrc != 0) { | |
455 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
456 | (int)hvrc); | |
457 | return -EIO; | |
458 | } | |
459 | ||
460 | wait_for_completion(&we.com); | |
461 | ||
462 | if (we.rc != 0) | |
463 | return -EIO; | |
464 | return 0; | |
465 | } | |
466 | ||
467 | static int viocd_packet(struct cdrom_device_info *cdi, | |
468 | struct packet_command *cgc) | |
469 | { | |
470 | unsigned int buflen = cgc->buflen; | |
471 | int ret = -EIO; | |
472 | ||
473 | switch (cgc->cmd[0]) { | |
474 | case GPCMD_READ_DISC_INFO: | |
475 | { | |
476 | disc_information *di = (disc_information *)cgc->buffer; | |
477 | ||
478 | if (buflen >= 2) { | |
479 | di->disc_information_length = cpu_to_be16(1); | |
480 | ret = 0; | |
481 | } | |
482 | if (buflen >= 3) | |
483 | di->erasable = | |
484 | (cdi->ops->capability & ~cdi->mask | |
485 | & (CDC_DVD_RAM | CDC_RAM)) != 0; | |
486 | } | |
487 | break; | |
9db29258 SR |
488 | case GPCMD_GET_CONFIGURATION: |
489 | if (cgc->cmd[3] == CDF_RWRT) { | |
490 | struct rwrt_feature_desc *rfd = (struct rwrt_feature_desc *)(cgc->buffer + sizeof(struct feature_header)); | |
491 | ||
492 | if ((buflen >= | |
493 | (sizeof(struct feature_header) + sizeof(*rfd))) && | |
494 | (cdi->ops->capability & ~cdi->mask | |
495 | & (CDC_DVD_RAM | CDC_RAM))) { | |
496 | rfd->feature_code = cpu_to_be16(CDF_RWRT); | |
497 | rfd->curr = 1; | |
498 | ret = 0; | |
499 | } | |
500 | } | |
501 | break; | |
1da177e4 LT |
502 | default: |
503 | if (cgc->sense) { | |
504 | /* indicate Unknown code */ | |
505 | cgc->sense->sense_key = 0x05; | |
506 | cgc->sense->asc = 0x20; | |
507 | cgc->sense->ascq = 0x00; | |
508 | } | |
509 | break; | |
510 | } | |
511 | ||
512 | cgc->stat = ret; | |
513 | return ret; | |
514 | } | |
515 | ||
516 | static void restart_all_queues(int first_index) | |
517 | { | |
518 | int i; | |
519 | ||
520 | for (i = first_index + 1; i < viocd_numdev; i++) | |
521 | if (viocd_diskinfo[i].viocd_disk) | |
522 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
523 | for (i = 0; i <= first_index; i++) | |
524 | if (viocd_diskinfo[i].viocd_disk) | |
525 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
526 | } | |
527 | ||
528 | /* This routine handles incoming CD LP events */ | |
529 | static void vio_handle_cd_event(struct HvLpEvent *event) | |
530 | { | |
531 | struct viocdlpevent *bevent; | |
532 | struct viocd_waitevent *pwe; | |
533 | struct disk_info *di; | |
534 | unsigned long flags; | |
535 | struct request *req; | |
536 | ||
537 | ||
538 | if (event == NULL) | |
539 | /* Notification that a partition went away! */ | |
540 | return; | |
541 | /* First, we should NEVER get an int here...only acks */ | |
677f8c0d | 542 | if (hvlpevent_is_int(event)) { |
1da177e4 LT |
543 | printk(VIOCD_KERN_WARNING |
544 | "Yikes! got an int in viocd event handler!\n"); | |
677f8c0d | 545 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
546 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
547 | HvCallEvent_ackLpEvent(event); | |
548 | } | |
549 | } | |
550 | ||
551 | bevent = (struct viocdlpevent *)event; | |
552 | ||
553 | switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) { | |
554 | case viocdopen: | |
555 | if (event->xRc == 0) { | |
556 | di = &viocd_diskinfo[bevent->disk]; | |
557 | blk_queue_hardsect_size(di->viocd_disk->queue, | |
558 | bevent->block_size); | |
559 | set_capacity(di->viocd_disk, | |
560 | bevent->media_size * | |
561 | bevent->block_size / 512); | |
562 | } | |
563 | /* FALLTHROUGH !! */ | |
564 | case viocdgetinfo: | |
565 | case viocdlockdoor: | |
566 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
567 | return_complete: | |
568 | pwe->rc = event->xRc; | |
569 | pwe->sub_result = bevent->sub_result; | |
570 | complete(&pwe->com); | |
571 | break; | |
572 | ||
573 | case viocdcheck: | |
574 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
575 | pwe->changed = bevent->flags; | |
576 | goto return_complete; | |
577 | ||
578 | case viocdclose: | |
579 | break; | |
580 | ||
581 | case viocdwrite: | |
582 | case viocdread: | |
583 | /* | |
584 | * Since this is running in interrupt mode, we need to | |
585 | * make sure we're not stepping on any global I/O operations | |
586 | */ | |
587 | di = &viocd_diskinfo[bevent->disk]; | |
588 | spin_lock_irqsave(&viocd_reqlock, flags); | |
589 | dma_unmap_single(di->dev, bevent->token, bevent->len, | |
590 | ((event->xSubtype & VIOMINOR_SUBTYPE_MASK) == viocdread) | |
591 | ? DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
592 | req = (struct request *)bevent->event.xCorrelationToken; | |
593 | rwreq--; | |
594 | ||
595 | if (event->xRc != HvLpEvent_Rc_Good) { | |
596 | const struct vio_error_entry *err = | |
597 | vio_lookup_rc(viocd_err_table, | |
598 | bevent->sub_result); | |
599 | printk(VIOCD_KERN_WARNING "request %p failed " | |
600 | "with rc %d:0x%04X: %s\n", | |
601 | req, event->xRc, | |
602 | bevent->sub_result, err->msg); | |
603 | end_request(req, 0); | |
604 | } else | |
605 | end_request(req, 1); | |
606 | ||
607 | /* restart handling of incoming requests */ | |
608 | spin_unlock_irqrestore(&viocd_reqlock, flags); | |
609 | restart_all_queues(bevent->disk); | |
610 | break; | |
611 | ||
612 | default: | |
613 | printk(VIOCD_KERN_WARNING | |
614 | "message with invalid subtype %0x04X!\n", | |
615 | event->xSubtype & VIOMINOR_SUBTYPE_MASK); | |
677f8c0d | 616 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
617 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
618 | HvCallEvent_ackLpEvent(event); | |
619 | } | |
620 | } | |
621 | } | |
622 | ||
623 | static struct cdrom_device_ops viocd_dops = { | |
624 | .open = viocd_open, | |
625 | .release = viocd_release, | |
626 | .media_changed = viocd_media_changed, | |
627 | .lock_door = viocd_lock_door, | |
628 | .generic_packet = viocd_packet, | |
6a2900b6 | 629 | .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 |
630 | }; |
631 | ||
632 | static int __init find_capability(const char *type) | |
633 | { | |
634 | struct capability_entry *entry; | |
635 | ||
636 | for(entry = capability_table; entry->type; ++entry) | |
637 | if(!strncmp(entry->type, type, 4)) | |
638 | break; | |
639 | return entry->capability; | |
640 | } | |
641 | ||
642 | static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
643 | { | |
644 | struct gendisk *gendisk; | |
645 | int deviceno; | |
646 | struct disk_info *d; | |
647 | struct cdrom_device_info *c; | |
648 | struct cdrom_info *ci; | |
649 | struct request_queue *q; | |
650 | ||
651 | deviceno = vdev->unit_address; | |
652 | if (deviceno >= viocd_numdev) | |
653 | return -ENODEV; | |
654 | ||
655 | d = &viocd_diskinfo[deviceno]; | |
656 | c = &d->viocd_info; | |
657 | ci = &viocd_unitinfo[deviceno]; | |
658 | ||
659 | c->ops = &viocd_dops; | |
660 | c->speed = 4; | |
661 | c->capacity = 1; | |
662 | c->handle = d; | |
663 | c->mask = ~find_capability(ci->type); | |
664 | sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno); | |
665 | ||
666 | if (register_cdrom(c) != 0) { | |
667 | printk(VIOCD_KERN_WARNING "Cannot register viocd CD-ROM %s!\n", | |
668 | c->name); | |
669 | goto out; | |
670 | } | |
671 | printk(VIOCD_KERN_INFO "cd %s is iSeries resource %10.10s " | |
672 | "type %4.4s, model %3.3s\n", | |
673 | c->name, ci->rsrcname, ci->type, ci->model); | |
674 | q = blk_init_queue(do_viocd_request, &viocd_reqlock); | |
675 | if (q == NULL) { | |
676 | printk(VIOCD_KERN_WARNING "Cannot allocate queue for %s!\n", | |
677 | c->name); | |
678 | goto out_unregister_cdrom; | |
679 | } | |
680 | gendisk = alloc_disk(1); | |
681 | if (gendisk == NULL) { | |
682 | printk(VIOCD_KERN_WARNING "Cannot create gendisk for %s!\n", | |
683 | c->name); | |
684 | goto out_cleanup_queue; | |
685 | } | |
686 | gendisk->major = VIOCD_MAJOR; | |
687 | gendisk->first_minor = deviceno; | |
688 | strncpy(gendisk->disk_name, c->name, | |
689 | sizeof(gendisk->disk_name)); | |
1da177e4 LT |
690 | blk_queue_max_hw_segments(q, 1); |
691 | blk_queue_max_phys_segments(q, 1); | |
692 | blk_queue_max_sectors(q, 4096 / 512); | |
693 | gendisk->queue = q; | |
694 | gendisk->fops = &viocd_fops; | |
695 | gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE; | |
696 | set_capacity(gendisk, 0); | |
697 | gendisk->private_data = d; | |
698 | d->viocd_disk = gendisk; | |
699 | d->dev = &vdev->dev; | |
700 | gendisk->driverfs_dev = d->dev; | |
701 | add_disk(gendisk); | |
702 | return 0; | |
703 | ||
704 | out_cleanup_queue: | |
705 | blk_cleanup_queue(q); | |
706 | out_unregister_cdrom: | |
707 | unregister_cdrom(c); | |
708 | out: | |
709 | return -ENODEV; | |
710 | } | |
711 | ||
712 | static int viocd_remove(struct vio_dev *vdev) | |
713 | { | |
714 | struct disk_info *d = &viocd_diskinfo[vdev->unit_address]; | |
715 | ||
716 | if (unregister_cdrom(&d->viocd_info) != 0) | |
717 | printk(VIOCD_KERN_WARNING | |
718 | "Cannot unregister viocd CD-ROM %s!\n", | |
719 | d->viocd_info.name); | |
720 | del_gendisk(d->viocd_disk); | |
721 | blk_cleanup_queue(d->viocd_disk->queue); | |
722 | put_disk(d->viocd_disk); | |
723 | return 0; | |
724 | } | |
725 | ||
726 | /** | |
727 | * viocd_device_table: Used by vio.c to match devices that we | |
728 | * support. | |
729 | */ | |
730 | static struct vio_device_id viocd_device_table[] __devinitdata = { | |
de0fe3b8 | 731 | { "block", "IBM,iSeries-viocd" }, |
fb120da6 | 732 | { "", "" } |
1da177e4 | 733 | }; |
1da177e4 | 734 | MODULE_DEVICE_TABLE(vio, viocd_device_table); |
915124d8 | 735 | |
1da177e4 | 736 | static struct vio_driver viocd_driver = { |
1da177e4 LT |
737 | .id_table = viocd_device_table, |
738 | .probe = viocd_probe, | |
6fdf5392 SR |
739 | .remove = viocd_remove, |
740 | .driver = { | |
741 | .name = "viocd", | |
915124d8 | 742 | .owner = THIS_MODULE, |
6fdf5392 | 743 | } |
1da177e4 LT |
744 | }; |
745 | ||
746 | static int __init viocd_init(void) | |
747 | { | |
748 | struct proc_dir_entry *e; | |
749 | int ret = 0; | |
750 | ||
751 | if (viopath_hostLp == HvLpIndexInvalid) { | |
752 | vio_set_hostlp(); | |
753 | /* If we don't have a host, bail out */ | |
754 | if (viopath_hostLp == HvLpIndexInvalid) | |
755 | return -ENODEV; | |
756 | } | |
757 | ||
758 | printk(VIOCD_KERN_INFO "vers " VIOCD_VERS ", hosting partition %d\n", | |
759 | viopath_hostLp); | |
760 | ||
761 | if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) { | |
762 | printk(VIOCD_KERN_WARNING "Unable to get major %d for %s\n", | |
763 | VIOCD_MAJOR, VIOCD_DEVICE); | |
764 | return -EIO; | |
765 | } | |
766 | ||
767 | ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio, | |
768 | MAX_CD_REQ + 2); | |
769 | if (ret) { | |
770 | printk(VIOCD_KERN_WARNING | |
771 | "error opening path to host partition %d\n", | |
772 | viopath_hostLp); | |
773 | goto out_unregister; | |
774 | } | |
775 | ||
776 | /* Initialize our request handler */ | |
777 | vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event); | |
778 | ||
779 | get_viocd_info(); | |
780 | ||
781 | spin_lock_init(&viocd_reqlock); | |
782 | ||
783 | ret = vio_register_driver(&viocd_driver); | |
784 | if (ret) | |
785 | goto out_free_info; | |
786 | ||
787 | e = create_proc_entry("iSeries/viocd", S_IFREG|S_IRUGO, NULL); | |
788 | if (e) { | |
789 | e->owner = THIS_MODULE; | |
790 | e->proc_fops = &proc_viocd_operations; | |
791 | } | |
792 | ||
793 | return 0; | |
794 | ||
795 | out_free_info: | |
796 | dma_free_coherent(iSeries_vio_dev, | |
797 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, | |
798 | viocd_unitinfo, unitinfo_dmaaddr); | |
799 | vio_clearHandler(viomajorsubtype_cdio); | |
800 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); | |
801 | out_unregister: | |
802 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
803 | return ret; | |
804 | } | |
805 | ||
806 | static void __exit viocd_exit(void) | |
807 | { | |
808 | remove_proc_entry("iSeries/viocd", NULL); | |
809 | vio_unregister_driver(&viocd_driver); | |
810 | if (viocd_unitinfo != NULL) | |
811 | dma_free_coherent(iSeries_vio_dev, | |
812 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, | |
813 | viocd_unitinfo, unitinfo_dmaaddr); | |
814 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); | |
815 | vio_clearHandler(viomajorsubtype_cdio); | |
816 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
817 | } | |
818 | ||
819 | module_init(viocd_init); | |
820 | module_exit(viocd_exit); | |
821 | MODULE_LICENSE("GPL"); |