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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> |
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 | ||
59 | struct viocdlpevent { | |
60 | struct HvLpEvent event; | |
61 | u32 reserved; | |
62 | u16 version; | |
63 | u16 sub_result; | |
64 | u16 disk; | |
65 | u16 flags; | |
66 | u32 token; | |
67 | u64 offset; /* On open, max number of disks */ | |
68 | u64 len; /* On open, size of the disk */ | |
69 | u32 block_size; /* Only set on open */ | |
70 | u32 media_size; /* Only set on open */ | |
71 | }; | |
72 | ||
73 | enum viocdsubtype { | |
74 | viocdopen = 0x0001, | |
75 | viocdclose = 0x0002, | |
76 | viocdread = 0x0003, | |
77 | viocdwrite = 0x0004, | |
78 | viocdlockdoor = 0x0005, | |
79 | viocdgetinfo = 0x0006, | |
80 | viocdcheck = 0x0007 | |
81 | }; | |
82 | ||
83 | /* | |
84 | * Should probably make this a module parameter....sigh | |
85 | */ | |
86 | #define VIOCD_MAX_CD HVMAXARCHITECTEDVIRTUALCDROMS | |
87 | ||
88 | static const struct vio_error_entry viocd_err_table[] = { | |
89 | {0x0201, EINVAL, "Invalid Range"}, | |
90 | {0x0202, EINVAL, "Invalid Token"}, | |
91 | {0x0203, EIO, "DMA Error"}, | |
92 | {0x0204, EIO, "Use Error"}, | |
93 | {0x0205, EIO, "Release Error"}, | |
94 | {0x0206, EINVAL, "Invalid CD"}, | |
95 | {0x020C, EROFS, "Read Only Device"}, | |
96 | {0x020D, ENOMEDIUM, "Changed or Missing Volume (or Varied Off?)"}, | |
97 | {0x020E, EIO, "Optical System Error (Varied Off?)"}, | |
98 | {0x02FF, EIO, "Internal Error"}, | |
99 | {0x3010, EIO, "Changed Volume"}, | |
100 | {0xC100, EIO, "Optical System Error"}, | |
101 | {0x0000, 0, NULL}, | |
102 | }; | |
103 | ||
104 | /* | |
105 | * This is the structure we use to exchange info between driver and interrupt | |
106 | * handler | |
107 | */ | |
108 | struct viocd_waitevent { | |
109 | struct completion com; | |
110 | int rc; | |
111 | u16 sub_result; | |
112 | int changed; | |
113 | }; | |
114 | ||
115 | /* this is a lookup table for the true capabilities of a device */ | |
116 | struct capability_entry { | |
117 | char *type; | |
118 | int capability; | |
119 | }; | |
120 | ||
121 | static struct capability_entry capability_table[] __initdata = { | |
122 | { "6330", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
123 | { "6331", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
124 | { "6333", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
125 | { "632A", CDC_LOCK | CDC_DVD_RAM | CDC_RAM }, | |
126 | { "6321", CDC_LOCK }, | |
127 | { "632B", 0 }, | |
128 | { NULL , CDC_LOCK }, | |
129 | }; | |
130 | ||
131 | /* These are our internal structures for keeping track of devices */ | |
132 | static int viocd_numdev; | |
133 | ||
134 | struct cdrom_info { | |
135 | char rsrcname[10]; | |
136 | char type[4]; | |
137 | char model[3]; | |
138 | }; | |
1da177e4 LT |
139 | |
140 | struct disk_info { | |
141 | struct gendisk *viocd_disk; | |
142 | struct cdrom_device_info viocd_info; | |
143 | struct device *dev; | |
73be7d52 | 144 | struct cdrom_info unitinfo; |
1da177e4 LT |
145 | }; |
146 | static struct disk_info viocd_diskinfo[VIOCD_MAX_CD]; | |
147 | ||
148 | #define DEVICE_NR(di) ((di) - &viocd_diskinfo[0]) | |
149 | ||
150 | static spinlock_t viocd_reqlock; | |
151 | ||
152 | #define MAX_CD_REQ 1 | |
153 | ||
154 | /* procfs support */ | |
155 | static int proc_viocd_show(struct seq_file *m, void *v) | |
156 | { | |
157 | int i; | |
158 | ||
159 | for (i = 0; i < viocd_numdev; i++) { | |
160 | seq_printf(m, "viocd device %d is iSeries resource %10.10s" | |
161 | "type %4.4s, model %3.3s\n", | |
73be7d52 SR |
162 | i, viocd_diskinfo[i].unitinfo.rsrcname, |
163 | viocd_diskinfo[i].unitinfo.type, | |
164 | viocd_diskinfo[i].unitinfo.model); | |
1da177e4 LT |
165 | } |
166 | return 0; | |
167 | } | |
168 | ||
169 | static int proc_viocd_open(struct inode *inode, struct file *file) | |
170 | { | |
171 | return single_open(file, proc_viocd_show, NULL); | |
172 | } | |
173 | ||
2b8693c0 | 174 | static const struct file_operations proc_viocd_operations = { |
1da177e4 LT |
175 | .open = proc_viocd_open, |
176 | .read = seq_read, | |
177 | .llseek = seq_lseek, | |
178 | .release = single_release, | |
179 | }; | |
180 | ||
181 | static int viocd_blk_open(struct inode *inode, struct file *file) | |
182 | { | |
183 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
184 | return cdrom_open(&di->viocd_info, inode, file); | |
185 | } | |
186 | ||
187 | static int viocd_blk_release(struct inode *inode, struct file *file) | |
188 | { | |
189 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
190 | return cdrom_release(&di->viocd_info, file); | |
191 | } | |
192 | ||
193 | static int viocd_blk_ioctl(struct inode *inode, struct file *file, | |
194 | unsigned cmd, unsigned long arg) | |
195 | { | |
196 | struct disk_info *di = inode->i_bdev->bd_disk->private_data; | |
197 | return cdrom_ioctl(file, &di->viocd_info, inode, cmd, arg); | |
198 | } | |
199 | ||
200 | static int viocd_blk_media_changed(struct gendisk *disk) | |
201 | { | |
202 | struct disk_info *di = disk->private_data; | |
203 | return cdrom_media_changed(&di->viocd_info); | |
204 | } | |
205 | ||
206 | struct block_device_operations viocd_fops = { | |
207 | .owner = THIS_MODULE, | |
208 | .open = viocd_blk_open, | |
209 | .release = viocd_blk_release, | |
210 | .ioctl = viocd_blk_ioctl, | |
211 | .media_changed = viocd_blk_media_changed, | |
212 | }; | |
213 | ||
214 | /* Get info on CD devices from OS/400 */ | |
215 | static void __init get_viocd_info(void) | |
216 | { | |
217 | HvLpEvent_Rc hvrc; | |
218 | int i; | |
219 | struct viocd_waitevent we; | |
73be7d52 SR |
220 | struct cdrom_info *viocd_unitinfo; |
221 | dma_addr_t unitinfo_dmaaddr; | |
1da177e4 | 222 | |
1670b2b2 | 223 | viocd_unitinfo = iseries_hv_alloc( |
1da177e4 LT |
224 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, |
225 | &unitinfo_dmaaddr, GFP_ATOMIC); | |
226 | if (viocd_unitinfo == NULL) { | |
227 | printk(VIOCD_KERN_WARNING "error allocating unitinfo\n"); | |
228 | return; | |
229 | } | |
230 | ||
231 | memset(viocd_unitinfo, 0, sizeof(*viocd_unitinfo) * VIOCD_MAX_CD); | |
232 | ||
233 | init_completion(&we.com); | |
234 | ||
235 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
236 | HvLpEvent_Type_VirtualIo, | |
237 | viomajorsubtype_cdio | viocdgetinfo, | |
238 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
239 | viopath_sourceinst(viopath_hostLp), | |
240 | viopath_targetinst(viopath_hostLp), | |
241 | (u64)&we, VIOVERSION << 16, unitinfo_dmaaddr, 0, | |
242 | sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, 0); | |
243 | if (hvrc != HvLpEvent_Rc_Good) { | |
244 | printk(VIOCD_KERN_WARNING "cdrom error sending event. rc %d\n", | |
245 | (int)hvrc); | |
246 | goto error_ret; | |
247 | } | |
248 | ||
249 | wait_for_completion(&we.com); | |
250 | ||
251 | if (we.rc) { | |
252 | const struct vio_error_entry *err = | |
253 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
254 | printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on getinfo: %s\n", | |
255 | we.rc, we.sub_result, err->msg); | |
256 | goto error_ret; | |
257 | } | |
258 | ||
73be7d52 SR |
259 | for (i = 0; (i < VIOCD_MAX_CD) && viocd_unitinfo[i].rsrcname[0]; i++) { |
260 | viocd_diskinfo[viocd_numdev].unitinfo = viocd_unitinfo[i]; | |
1da177e4 | 261 | viocd_numdev++; |
73be7d52 | 262 | } |
1da177e4 LT |
263 | |
264 | error_ret: | |
1670b2b2 | 265 | iseries_hv_free(sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, |
73be7d52 | 266 | viocd_unitinfo, unitinfo_dmaaddr); |
1da177e4 LT |
267 | } |
268 | ||
269 | static int viocd_open(struct cdrom_device_info *cdi, int purpose) | |
270 | { | |
271 | struct disk_info *diskinfo = cdi->handle; | |
272 | int device_no = DEVICE_NR(diskinfo); | |
273 | HvLpEvent_Rc hvrc; | |
274 | struct viocd_waitevent we; | |
275 | ||
276 | init_completion(&we.com); | |
277 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
278 | HvLpEvent_Type_VirtualIo, | |
279 | viomajorsubtype_cdio | viocdopen, | |
280 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
281 | viopath_sourceinst(viopath_hostLp), | |
282 | viopath_targetinst(viopath_hostLp), | |
283 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
284 | 0, 0, 0); | |
285 | if (hvrc != 0) { | |
286 | printk(VIOCD_KERN_WARNING | |
287 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
288 | (int)hvrc); | |
289 | return -EIO; | |
290 | } | |
291 | ||
292 | wait_for_completion(&we.com); | |
293 | ||
294 | if (we.rc) { | |
295 | const struct vio_error_entry *err = | |
296 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
297 | printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on open: %s\n", | |
298 | we.rc, we.sub_result, err->msg); | |
299 | return -err->errno; | |
300 | } | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
305 | static void viocd_release(struct cdrom_device_info *cdi) | |
306 | { | |
307 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
308 | HvLpEvent_Rc hvrc; | |
309 | ||
310 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
311 | HvLpEvent_Type_VirtualIo, | |
312 | viomajorsubtype_cdio | viocdclose, | |
313 | HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck, | |
314 | viopath_sourceinst(viopath_hostLp), | |
315 | viopath_targetinst(viopath_hostLp), 0, | |
316 | VIOVERSION << 16, ((u64)device_no << 48), 0, 0, 0); | |
317 | if (hvrc != 0) | |
318 | printk(VIOCD_KERN_WARNING | |
319 | "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
320 | (int)hvrc); | |
321 | } | |
322 | ||
323 | /* Send a read or write request to OS/400 */ | |
324 | static int send_request(struct request *req) | |
325 | { | |
326 | HvLpEvent_Rc hvrc; | |
327 | struct disk_info *diskinfo = req->rq_disk->private_data; | |
328 | u64 len; | |
329 | dma_addr_t dmaaddr; | |
330 | int direction; | |
331 | u16 cmd; | |
332 | struct scatterlist sg; | |
333 | ||
334 | BUG_ON(req->nr_phys_segments > 1); | |
335 | ||
336 | if (rq_data_dir(req) == READ) { | |
337 | direction = DMA_FROM_DEVICE; | |
338 | cmd = viomajorsubtype_cdio | viocdread; | |
339 | } else { | |
340 | direction = DMA_TO_DEVICE; | |
341 | cmd = viomajorsubtype_cdio | viocdwrite; | |
342 | } | |
343 | ||
344 | if (blk_rq_map_sg(req->q, req, &sg) == 0) { | |
345 | printk(VIOCD_KERN_WARNING | |
346 | "error setting up scatter/gather list\n"); | |
347 | return -1; | |
348 | } | |
349 | ||
350 | if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) { | |
351 | printk(VIOCD_KERN_WARNING "error allocating sg tce\n"); | |
352 | return -1; | |
353 | } | |
354 | dmaaddr = sg_dma_address(&sg); | |
355 | len = sg_dma_len(&sg); | |
356 | ||
357 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
358 | HvLpEvent_Type_VirtualIo, cmd, | |
359 | HvLpEvent_AckInd_DoAck, | |
360 | HvLpEvent_AckType_ImmediateAck, | |
361 | viopath_sourceinst(viopath_hostLp), | |
362 | viopath_targetinst(viopath_hostLp), | |
363 | (u64)req, VIOVERSION << 16, | |
364 | ((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr, | |
365 | (u64)req->sector * 512, len, 0); | |
366 | if (hvrc != HvLpEvent_Rc_Good) { | |
367 | printk(VIOCD_KERN_WARNING "hv error on op %d\n", (int)hvrc); | |
368 | return -1; | |
369 | } | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
1ad7c311 TB |
374 | static void viocd_end_request(struct request *req, int uptodate) |
375 | { | |
376 | int nsectors = req->hard_nr_sectors; | |
377 | ||
378 | /* | |
379 | * Make sure it's fully ended, and ensure that we process | |
380 | * at least one sector. | |
381 | */ | |
382 | if (blk_pc_request(req)) | |
383 | nsectors = (req->data_len + 511) >> 9; | |
384 | if (!nsectors) | |
385 | nsectors = 1; | |
386 | ||
387 | if (end_that_request_first(req, uptodate, nsectors)) | |
388 | BUG(); | |
389 | add_disk_randomness(req->rq_disk); | |
390 | blkdev_dequeue_request(req); | |
391 | end_that_request_last(req, uptodate); | |
392 | } | |
1da177e4 LT |
393 | |
394 | static int rwreq; | |
395 | ||
165125e1 | 396 | static void do_viocd_request(struct request_queue *q) |
1da177e4 LT |
397 | { |
398 | struct request *req; | |
399 | ||
400 | while ((rwreq == 0) && ((req = elv_next_request(q)) != NULL)) { | |
401 | if (!blk_fs_request(req)) | |
1ad7c311 | 402 | viocd_end_request(req, 0); |
1da177e4 LT |
403 | else if (send_request(req) < 0) { |
404 | printk(VIOCD_KERN_WARNING | |
405 | "unable to send message to OS/400!"); | |
1ad7c311 | 406 | viocd_end_request(req, 0); |
1da177e4 LT |
407 | } else |
408 | rwreq++; | |
409 | } | |
410 | } | |
411 | ||
412 | static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr) | |
413 | { | |
414 | struct viocd_waitevent we; | |
415 | HvLpEvent_Rc hvrc; | |
416 | int device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
417 | ||
418 | init_completion(&we.com); | |
419 | ||
420 | /* Send the open event to OS/400 */ | |
421 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
422 | HvLpEvent_Type_VirtualIo, | |
423 | viomajorsubtype_cdio | viocdcheck, | |
424 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
425 | viopath_sourceinst(viopath_hostLp), | |
426 | viopath_targetinst(viopath_hostLp), | |
427 | (u64)&we, VIOVERSION << 16, ((u64)device_no << 48), | |
428 | 0, 0, 0); | |
429 | if (hvrc != 0) { | |
430 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
431 | (int)hvrc); | |
432 | return -EIO; | |
433 | } | |
434 | ||
435 | wait_for_completion(&we.com); | |
436 | ||
437 | /* Check the return code. If bad, assume no change */ | |
438 | if (we.rc) { | |
439 | const struct vio_error_entry *err = | |
440 | vio_lookup_rc(viocd_err_table, we.sub_result); | |
441 | printk(VIOCD_KERN_WARNING | |
442 | "bad rc %d:0x%04X on check_change: %s; Assuming no change\n", | |
443 | we.rc, we.sub_result, err->msg); | |
444 | return 0; | |
445 | } | |
446 | ||
447 | return we.changed; | |
448 | } | |
449 | ||
450 | static int viocd_lock_door(struct cdrom_device_info *cdi, int locking) | |
451 | { | |
452 | HvLpEvent_Rc hvrc; | |
453 | u64 device_no = DEVICE_NR((struct disk_info *)cdi->handle); | |
454 | /* NOTE: flags is 1 or 0 so it won't overwrite the device_no */ | |
455 | u64 flags = !!locking; | |
456 | struct viocd_waitevent we; | |
457 | ||
458 | init_completion(&we.com); | |
459 | ||
460 | /* Send the lockdoor event to OS/400 */ | |
461 | hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, | |
462 | HvLpEvent_Type_VirtualIo, | |
463 | viomajorsubtype_cdio | viocdlockdoor, | |
464 | HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, | |
465 | viopath_sourceinst(viopath_hostLp), | |
466 | viopath_targetinst(viopath_hostLp), | |
467 | (u64)&we, VIOVERSION << 16, | |
468 | (device_no << 48) | (flags << 32), 0, 0, 0); | |
469 | if (hvrc != 0) { | |
470 | printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n", | |
471 | (int)hvrc); | |
472 | return -EIO; | |
473 | } | |
474 | ||
475 | wait_for_completion(&we.com); | |
476 | ||
477 | if (we.rc != 0) | |
478 | return -EIO; | |
479 | return 0; | |
480 | } | |
481 | ||
482 | static int viocd_packet(struct cdrom_device_info *cdi, | |
483 | struct packet_command *cgc) | |
484 | { | |
485 | unsigned int buflen = cgc->buflen; | |
486 | int ret = -EIO; | |
487 | ||
488 | switch (cgc->cmd[0]) { | |
489 | case GPCMD_READ_DISC_INFO: | |
490 | { | |
491 | disc_information *di = (disc_information *)cgc->buffer; | |
492 | ||
493 | if (buflen >= 2) { | |
494 | di->disc_information_length = cpu_to_be16(1); | |
495 | ret = 0; | |
496 | } | |
497 | if (buflen >= 3) | |
498 | di->erasable = | |
499 | (cdi->ops->capability & ~cdi->mask | |
500 | & (CDC_DVD_RAM | CDC_RAM)) != 0; | |
501 | } | |
502 | break; | |
9db29258 SR |
503 | case GPCMD_GET_CONFIGURATION: |
504 | if (cgc->cmd[3] == CDF_RWRT) { | |
505 | struct rwrt_feature_desc *rfd = (struct rwrt_feature_desc *)(cgc->buffer + sizeof(struct feature_header)); | |
506 | ||
507 | if ((buflen >= | |
508 | (sizeof(struct feature_header) + sizeof(*rfd))) && | |
509 | (cdi->ops->capability & ~cdi->mask | |
510 | & (CDC_DVD_RAM | CDC_RAM))) { | |
511 | rfd->feature_code = cpu_to_be16(CDF_RWRT); | |
512 | rfd->curr = 1; | |
513 | ret = 0; | |
514 | } | |
515 | } | |
516 | break; | |
1da177e4 LT |
517 | default: |
518 | if (cgc->sense) { | |
519 | /* indicate Unknown code */ | |
520 | cgc->sense->sense_key = 0x05; | |
521 | cgc->sense->asc = 0x20; | |
522 | cgc->sense->ascq = 0x00; | |
523 | } | |
524 | break; | |
525 | } | |
526 | ||
527 | cgc->stat = ret; | |
528 | return ret; | |
529 | } | |
530 | ||
531 | static void restart_all_queues(int first_index) | |
532 | { | |
533 | int i; | |
534 | ||
535 | for (i = first_index + 1; i < viocd_numdev; i++) | |
536 | if (viocd_diskinfo[i].viocd_disk) | |
537 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
538 | for (i = 0; i <= first_index; i++) | |
539 | if (viocd_diskinfo[i].viocd_disk) | |
540 | blk_run_queue(viocd_diskinfo[i].viocd_disk->queue); | |
541 | } | |
542 | ||
543 | /* This routine handles incoming CD LP events */ | |
544 | static void vio_handle_cd_event(struct HvLpEvent *event) | |
545 | { | |
546 | struct viocdlpevent *bevent; | |
547 | struct viocd_waitevent *pwe; | |
548 | struct disk_info *di; | |
549 | unsigned long flags; | |
550 | struct request *req; | |
551 | ||
552 | ||
553 | if (event == NULL) | |
554 | /* Notification that a partition went away! */ | |
555 | return; | |
556 | /* First, we should NEVER get an int here...only acks */ | |
677f8c0d | 557 | if (hvlpevent_is_int(event)) { |
1da177e4 LT |
558 | printk(VIOCD_KERN_WARNING |
559 | "Yikes! got an int in viocd event handler!\n"); | |
677f8c0d | 560 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
561 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
562 | HvCallEvent_ackLpEvent(event); | |
563 | } | |
564 | } | |
565 | ||
566 | bevent = (struct viocdlpevent *)event; | |
567 | ||
568 | switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) { | |
569 | case viocdopen: | |
570 | if (event->xRc == 0) { | |
571 | di = &viocd_diskinfo[bevent->disk]; | |
572 | blk_queue_hardsect_size(di->viocd_disk->queue, | |
573 | bevent->block_size); | |
574 | set_capacity(di->viocd_disk, | |
575 | bevent->media_size * | |
576 | bevent->block_size / 512); | |
577 | } | |
578 | /* FALLTHROUGH !! */ | |
579 | case viocdgetinfo: | |
580 | case viocdlockdoor: | |
581 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
582 | return_complete: | |
583 | pwe->rc = event->xRc; | |
584 | pwe->sub_result = bevent->sub_result; | |
585 | complete(&pwe->com); | |
586 | break; | |
587 | ||
588 | case viocdcheck: | |
589 | pwe = (struct viocd_waitevent *)event->xCorrelationToken; | |
590 | pwe->changed = bevent->flags; | |
591 | goto return_complete; | |
592 | ||
593 | case viocdclose: | |
594 | break; | |
595 | ||
596 | case viocdwrite: | |
597 | case viocdread: | |
598 | /* | |
599 | * Since this is running in interrupt mode, we need to | |
600 | * make sure we're not stepping on any global I/O operations | |
601 | */ | |
602 | di = &viocd_diskinfo[bevent->disk]; | |
603 | spin_lock_irqsave(&viocd_reqlock, flags); | |
604 | dma_unmap_single(di->dev, bevent->token, bevent->len, | |
605 | ((event->xSubtype & VIOMINOR_SUBTYPE_MASK) == viocdread) | |
606 | ? DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
607 | req = (struct request *)bevent->event.xCorrelationToken; | |
608 | rwreq--; | |
609 | ||
610 | if (event->xRc != HvLpEvent_Rc_Good) { | |
611 | const struct vio_error_entry *err = | |
612 | vio_lookup_rc(viocd_err_table, | |
613 | bevent->sub_result); | |
614 | printk(VIOCD_KERN_WARNING "request %p failed " | |
615 | "with rc %d:0x%04X: %s\n", | |
616 | req, event->xRc, | |
617 | bevent->sub_result, err->msg); | |
1ad7c311 | 618 | viocd_end_request(req, 0); |
1da177e4 | 619 | } else |
1ad7c311 | 620 | viocd_end_request(req, 1); |
1da177e4 LT |
621 | |
622 | /* restart handling of incoming requests */ | |
623 | spin_unlock_irqrestore(&viocd_reqlock, flags); | |
624 | restart_all_queues(bevent->disk); | |
625 | break; | |
626 | ||
627 | default: | |
628 | printk(VIOCD_KERN_WARNING | |
629 | "message with invalid subtype %0x04X!\n", | |
630 | event->xSubtype & VIOMINOR_SUBTYPE_MASK); | |
677f8c0d | 631 | if (hvlpevent_need_ack(event)) { |
1da177e4 LT |
632 | event->xRc = HvLpEvent_Rc_InvalidSubtype; |
633 | HvCallEvent_ackLpEvent(event); | |
634 | } | |
635 | } | |
636 | } | |
637 | ||
638 | static struct cdrom_device_ops viocd_dops = { | |
639 | .open = viocd_open, | |
640 | .release = viocd_release, | |
641 | .media_changed = viocd_media_changed, | |
642 | .lock_door = viocd_lock_door, | |
643 | .generic_packet = viocd_packet, | |
6a2900b6 | 644 | .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 |
645 | }; |
646 | ||
647 | static int __init find_capability(const char *type) | |
648 | { | |
649 | struct capability_entry *entry; | |
650 | ||
651 | for(entry = capability_table; entry->type; ++entry) | |
652 | if(!strncmp(entry->type, type, 4)) | |
653 | break; | |
654 | return entry->capability; | |
655 | } | |
656 | ||
657 | static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id) | |
658 | { | |
659 | struct gendisk *gendisk; | |
660 | int deviceno; | |
661 | struct disk_info *d; | |
662 | struct cdrom_device_info *c; | |
663 | struct cdrom_info *ci; | |
664 | struct request_queue *q; | |
665 | ||
666 | deviceno = vdev->unit_address; | |
667 | if (deviceno >= viocd_numdev) | |
668 | return -ENODEV; | |
669 | ||
670 | d = &viocd_diskinfo[deviceno]; | |
671 | c = &d->viocd_info; | |
73be7d52 | 672 | ci = &d->unitinfo; |
1da177e4 LT |
673 | |
674 | c->ops = &viocd_dops; | |
675 | c->speed = 4; | |
676 | c->capacity = 1; | |
677 | c->handle = d; | |
678 | c->mask = ~find_capability(ci->type); | |
679 | sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno); | |
680 | ||
681 | if (register_cdrom(c) != 0) { | |
682 | printk(VIOCD_KERN_WARNING "Cannot register viocd CD-ROM %s!\n", | |
683 | c->name); | |
684 | goto out; | |
685 | } | |
686 | printk(VIOCD_KERN_INFO "cd %s is iSeries resource %10.10s " | |
687 | "type %4.4s, model %3.3s\n", | |
688 | c->name, ci->rsrcname, ci->type, ci->model); | |
689 | q = blk_init_queue(do_viocd_request, &viocd_reqlock); | |
690 | if (q == NULL) { | |
691 | printk(VIOCD_KERN_WARNING "Cannot allocate queue for %s!\n", | |
692 | c->name); | |
693 | goto out_unregister_cdrom; | |
694 | } | |
695 | gendisk = alloc_disk(1); | |
696 | if (gendisk == NULL) { | |
697 | printk(VIOCD_KERN_WARNING "Cannot create gendisk for %s!\n", | |
698 | c->name); | |
699 | goto out_cleanup_queue; | |
700 | } | |
701 | gendisk->major = VIOCD_MAJOR; | |
702 | gendisk->first_minor = deviceno; | |
703 | strncpy(gendisk->disk_name, c->name, | |
704 | sizeof(gendisk->disk_name)); | |
1da177e4 LT |
705 | blk_queue_max_hw_segments(q, 1); |
706 | blk_queue_max_phys_segments(q, 1); | |
707 | blk_queue_max_sectors(q, 4096 / 512); | |
708 | gendisk->queue = q; | |
709 | gendisk->fops = &viocd_fops; | |
710 | gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE; | |
711 | set_capacity(gendisk, 0); | |
712 | gendisk->private_data = d; | |
713 | d->viocd_disk = gendisk; | |
714 | d->dev = &vdev->dev; | |
715 | gendisk->driverfs_dev = d->dev; | |
716 | add_disk(gendisk); | |
717 | return 0; | |
718 | ||
719 | out_cleanup_queue: | |
720 | blk_cleanup_queue(q); | |
721 | out_unregister_cdrom: | |
722 | unregister_cdrom(c); | |
723 | out: | |
724 | return -ENODEV; | |
725 | } | |
726 | ||
727 | static int viocd_remove(struct vio_dev *vdev) | |
728 | { | |
729 | struct disk_info *d = &viocd_diskinfo[vdev->unit_address]; | |
730 | ||
731 | if (unregister_cdrom(&d->viocd_info) != 0) | |
732 | printk(VIOCD_KERN_WARNING | |
733 | "Cannot unregister viocd CD-ROM %s!\n", | |
734 | d->viocd_info.name); | |
735 | del_gendisk(d->viocd_disk); | |
736 | blk_cleanup_queue(d->viocd_disk->queue); | |
737 | put_disk(d->viocd_disk); | |
738 | return 0; | |
739 | } | |
740 | ||
741 | /** | |
742 | * viocd_device_table: Used by vio.c to match devices that we | |
743 | * support. | |
744 | */ | |
745 | static struct vio_device_id viocd_device_table[] __devinitdata = { | |
de0fe3b8 | 746 | { "block", "IBM,iSeries-viocd" }, |
fb120da6 | 747 | { "", "" } |
1da177e4 | 748 | }; |
1da177e4 | 749 | MODULE_DEVICE_TABLE(vio, viocd_device_table); |
915124d8 | 750 | |
1da177e4 | 751 | static struct vio_driver viocd_driver = { |
1da177e4 LT |
752 | .id_table = viocd_device_table, |
753 | .probe = viocd_probe, | |
6fdf5392 SR |
754 | .remove = viocd_remove, |
755 | .driver = { | |
756 | .name = "viocd", | |
915124d8 | 757 | .owner = THIS_MODULE, |
6fdf5392 | 758 | } |
1da177e4 LT |
759 | }; |
760 | ||
761 | static int __init viocd_init(void) | |
762 | { | |
763 | struct proc_dir_entry *e; | |
764 | int ret = 0; | |
765 | ||
31c72ad0 SR |
766 | if (!firmware_has_feature(FW_FEATURE_ISERIES)) |
767 | return -ENODEV; | |
768 | ||
1da177e4 LT |
769 | if (viopath_hostLp == HvLpIndexInvalid) { |
770 | vio_set_hostlp(); | |
771 | /* If we don't have a host, bail out */ | |
772 | if (viopath_hostLp == HvLpIndexInvalid) | |
773 | return -ENODEV; | |
774 | } | |
775 | ||
776 | printk(VIOCD_KERN_INFO "vers " VIOCD_VERS ", hosting partition %d\n", | |
777 | viopath_hostLp); | |
778 | ||
779 | if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) { | |
780 | printk(VIOCD_KERN_WARNING "Unable to get major %d for %s\n", | |
781 | VIOCD_MAJOR, VIOCD_DEVICE); | |
782 | return -EIO; | |
783 | } | |
784 | ||
785 | ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio, | |
786 | MAX_CD_REQ + 2); | |
787 | if (ret) { | |
788 | printk(VIOCD_KERN_WARNING | |
789 | "error opening path to host partition %d\n", | |
790 | viopath_hostLp); | |
791 | goto out_unregister; | |
792 | } | |
793 | ||
794 | /* Initialize our request handler */ | |
795 | vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event); | |
796 | ||
797 | get_viocd_info(); | |
798 | ||
799 | spin_lock_init(&viocd_reqlock); | |
800 | ||
801 | ret = vio_register_driver(&viocd_driver); | |
802 | if (ret) | |
803 | goto out_free_info; | |
804 | ||
805 | e = create_proc_entry("iSeries/viocd", S_IFREG|S_IRUGO, NULL); | |
806 | if (e) { | |
807 | e->owner = THIS_MODULE; | |
808 | e->proc_fops = &proc_viocd_operations; | |
809 | } | |
810 | ||
811 | return 0; | |
812 | ||
813 | out_free_info: | |
1da177e4 LT |
814 | vio_clearHandler(viomajorsubtype_cdio); |
815 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); | |
816 | out_unregister: | |
817 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
818 | return ret; | |
819 | } | |
820 | ||
821 | static void __exit viocd_exit(void) | |
822 | { | |
823 | remove_proc_entry("iSeries/viocd", NULL); | |
824 | vio_unregister_driver(&viocd_driver); | |
1da177e4 LT |
825 | viopath_close(viopath_hostLp, viomajorsubtype_cdio, MAX_CD_REQ + 2); |
826 | vio_clearHandler(viomajorsubtype_cdio); | |
827 | unregister_blkdev(VIOCD_MAJOR, VIOCD_DEVICE); | |
828 | } | |
829 | ||
830 | module_init(viocd_init); | |
831 | module_exit(viocd_exit); | |
832 | MODULE_LICENSE("GPL"); |