FreeBSD/Linux Kernel Cross Reference
sys/dev/aac/aac_disk.c
1 /*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2001 Scott Long
4 * Copyright (c) 2000 BSDi
5 * Copyright (c) 2001 Adaptec, Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include "opt_aac.h"
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/sysctl.h>
40
41 #include <sys/bus.h>
42 #include <sys/conf.h>
43 #include <sys/disk.h>
44
45 #include <vm/vm.h>
46 #include <vm/pmap.h>
47
48 #include <machine/md_var.h>
49 #include <machine/bus.h>
50 #include <sys/rman.h>
51
52 #include <dev/aac/aacreg.h>
53 #include <sys/aac_ioctl.h>
54 #include <dev/aac/aacvar.h>
55
56 /*
57 * Interface to parent.
58 */
59 static int aac_disk_probe(device_t dev);
60 static int aac_disk_attach(device_t dev);
61 static int aac_disk_detach(device_t dev);
62
63 /*
64 * Interface to the device switch.
65 */
66 static disk_open_t aac_disk_open;
67 static disk_close_t aac_disk_close;
68 static disk_strategy_t aac_disk_strategy;
69 static dumper_t aac_disk_dump;
70
71 static devclass_t aac_disk_devclass;
72
73 static device_method_t aac_disk_methods[] = {
74 DEVMETHOD(device_probe, aac_disk_probe),
75 DEVMETHOD(device_attach, aac_disk_attach),
76 DEVMETHOD(device_detach, aac_disk_detach),
77 { 0, 0 }
78 };
79
80 static driver_t aac_disk_driver = {
81 "aacd",
82 aac_disk_methods,
83 sizeof(struct aac_disk)
84 };
85
86 #define AAC_MAXIO 65536
87
88 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0);
89
90 /* sysctl tunables */
91 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */
92 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max);
93
94 SYSCTL_DECL(_hw_aac);
95 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RDTUN, &aac_iosize_max, 0,
96 "Max I/O size per transfer to an array");
97
98 /*
99 * Handle open from generic layer.
100 *
101 * This is called by the diskslice code on first open in order to get the
102 * basic device geometry paramters.
103 */
104 static int
105 aac_disk_open(struct disk *dp)
106 {
107 struct aac_disk *sc;
108
109 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
110
111 sc = (struct aac_disk *)dp->d_drv1;
112
113 if (sc == NULL) {
114 printf("aac_disk_open: No Softc\n");
115 return (ENXIO);
116 }
117
118 /* check that the controller is up and running */
119 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) {
120 printf("Controller Suspended controller state = 0x%x\n",
121 sc->ad_controller->aac_state);
122 return(ENXIO);
123 }
124
125 sc->ad_flags |= AAC_DISK_OPEN;
126 return (0);
127 }
128
129 /*
130 * Handle last close of the disk device.
131 */
132 static int
133 aac_disk_close(struct disk *dp)
134 {
135 struct aac_disk *sc;
136
137 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
138
139 sc = (struct aac_disk *)dp->d_drv1;
140
141 if (sc == NULL)
142 return (ENXIO);
143
144 sc->ad_flags &= ~AAC_DISK_OPEN;
145 return (0);
146 }
147
148 /*
149 * Handle an I/O request.
150 */
151 static void
152 aac_disk_strategy(struct bio *bp)
153 {
154 struct aac_disk *sc;
155
156 sc = (struct aac_disk *)bp->bio_disk->d_drv1;
157 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
158
159 /* bogus disk? */
160 if (sc == NULL) {
161 bp->bio_flags |= BIO_ERROR;
162 bp->bio_error = EINVAL;
163 biodone(bp);
164 return;
165 }
166
167 /* do-nothing operation? */
168 if (bp->bio_bcount == 0) {
169 bp->bio_resid = bp->bio_bcount;
170 biodone(bp);
171 return;
172 }
173
174 /* perform accounting */
175
176 /* pass the bio to the controller - it can work out who we are */
177 mtx_lock(&sc->ad_controller->aac_io_lock);
178 aac_submit_bio(bp);
179 mtx_unlock(&sc->ad_controller->aac_io_lock);
180
181 return;
182 }
183
184 /*
185 * Map the S/G elements for doing a dump.
186 */
187 static void
188 aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
189 {
190 struct aac_fib *fib;
191 struct aac_blockwrite *bw;
192 struct aac_sg_table *sg;
193 int i;
194
195 fib = (struct aac_fib *)arg;
196 bw = (struct aac_blockwrite *)&fib->data[0];
197 sg = &bw->SgMap;
198
199 if (sg != NULL) {
200 sg->SgCount = nsegs;
201 for (i = 0; i < nsegs; i++) {
202 if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT)
203 return;
204 sg->SgEntry[i].SgAddress = segs[i].ds_addr;
205 sg->SgEntry[i].SgByteCount = segs[i].ds_len;
206 }
207 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry);
208 }
209 }
210
211 /*
212 * Map the S/G elements for doing a dump on 64-bit capable devices.
213 */
214 static void
215 aac_dump_map_sg64(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
216 {
217 struct aac_fib *fib;
218 struct aac_blockwrite64 *bw;
219 struct aac_sg_table64 *sg;
220 int i;
221
222 fib = (struct aac_fib *)arg;
223 bw = (struct aac_blockwrite64 *)&fib->data[0];
224 sg = &bw->SgMap64;
225
226 if (sg != NULL) {
227 sg->SgCount = nsegs;
228 for (i = 0; i < nsegs; i++) {
229 sg->SgEntry64[i].SgAddress = segs[i].ds_addr;
230 sg->SgEntry64[i].SgByteCount = segs[i].ds_len;
231 }
232 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry64);
233 }
234 }
235
236 /*
237 * Dump memory out to an array
238 *
239 * Send out one command at a time with up to AAC_MAXIO of data.
240 */
241 static int
242 aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
243 {
244 struct aac_disk *ad;
245 struct aac_softc *sc;
246 struct aac_fib *fib;
247 size_t len;
248 int size;
249 static bus_dmamap_t dump_datamap;
250 static int first = 0;
251 struct disk *dp;
252 bus_dmamap_callback_t *callback;
253 u_int32_t command;
254
255 dp = arg;
256 ad = dp->d_drv1;
257
258 if (ad == NULL)
259 return (EINVAL);
260
261 sc= ad->ad_controller;
262
263 if (!first) {
264 first = 1;
265 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) {
266 printf("bus_dmamap_create failed\n");
267 return (ENOMEM);
268 }
269 }
270
271 /* Skip aac_alloc_sync_fib(). We don't want to mess with sleep locks */
272 fib = &sc->aac_common->ac_sync_fib;
273
274 while (length > 0) {
275 len = (length > AAC_MAXIO) ? AAC_MAXIO : length;
276 if ((sc->flags & AAC_FLAGS_SG_64BIT) == 0) {
277 struct aac_blockwrite *bw;
278 bw = (struct aac_blockwrite *)&fib->data[0];
279 bw->Command = VM_CtBlockWrite;
280 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
281 bw->BlockNumber = offset / AAC_BLOCK_SIZE;
282 bw->ByteCount = len;
283 bw->Stable = CUNSTABLE;
284 command = ContainerCommand;
285 callback = aac_dump_map_sg;
286 size = sizeof(struct aac_blockwrite);
287 } else {
288 struct aac_blockwrite64 *bw;
289 bw = (struct aac_blockwrite64 *)&fib->data[0];
290 bw->Command = VM_CtHostWrite64;
291 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
292 bw->BlockNumber = offset / AAC_BLOCK_SIZE;
293 bw->SectorCount = len / AAC_BLOCK_SIZE;
294 bw->Pad = 0;
295 bw->Flags = 0;
296 command = ContainerCommand64;
297 callback = aac_dump_map_sg64;
298 size = sizeof(struct aac_blockwrite64);
299 }
300
301 /*
302 * There really isn't any way to recover from errors or
303 * resource shortages here. Oh well. Because of that, don't
304 * bother trying to send the command from the callback; there
305 * is too much required context.
306 */
307 if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual,
308 len, callback, fib, BUS_DMA_NOWAIT) != 0)
309 return (ENOMEM);
310
311 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
312 BUS_DMASYNC_PREWRITE);
313
314 /* fib->Header.Size is set in aac_dump_map_sg */
315 size += fib->Header.Size;
316
317 if (aac_sync_fib(sc, command, 0, fib, size)) {
318 printf("Error dumping block 0x%jx\n",
319 (uintmax_t)physical);
320 return (EIO);
321 }
322
323 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
324 BUS_DMASYNC_POSTWRITE);
325
326 bus_dmamap_unload(sc->aac_buffer_dmat, dump_datamap);
327
328 length -= len;
329 offset += len;
330 virtual = (uint8_t *)virtual + len;
331 }
332
333 return (0);
334 }
335
336 /*
337 * Handle completion of an I/O request.
338 */
339 void
340 aac_biodone(struct bio *bp)
341 {
342 struct aac_disk *sc;
343
344 sc = (struct aac_disk *)bp->bio_disk->d_drv1;
345 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
346
347 if (bp->bio_flags & BIO_ERROR)
348 disk_err(bp, "hard error", -1, 1);
349
350 biodone(bp);
351 }
352
353 /*
354 * Stub only.
355 */
356 static int
357 aac_disk_probe(device_t dev)
358 {
359
360 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
361
362 return (0);
363 }
364
365 /*
366 * Attach a unit to the controller.
367 */
368 static int
369 aac_disk_attach(device_t dev)
370 {
371 struct aac_disk *sc;
372
373 sc = (struct aac_disk *)device_get_softc(dev);
374 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
375
376 /* initialise our softc */
377 sc->ad_controller =
378 (struct aac_softc *)device_get_softc(device_get_parent(dev));
379 sc->ad_container = device_get_ivars(dev);
380 sc->ad_dev = dev;
381
382 /*
383 * require that extended translation be enabled - other drivers read the
384 * disk!
385 */
386 sc->ad_size = sc->ad_container->co_mntobj.Capacity;
387 if (sc->ad_controller->flags & AAC_FLAGS_LBA_64BIT)
388 sc->ad_size += (u_int64_t)
389 sc->ad_container->co_mntobj.CapacityHigh << 32;
390 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */
391 sc->ad_heads = 255;
392 sc->ad_sectors = 63;
393 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */
394 sc->ad_heads = 128;
395 sc->ad_sectors = 32;
396 } else {
397 sc->ad_heads = 64;
398 sc->ad_sectors = 32;
399 }
400 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
401
402 device_printf(dev, "%juMB (%ju sectors)\n",
403 (intmax_t)sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
404 (intmax_t)sc->ad_size);
405
406 /* attach a generic disk device to ourselves */
407 sc->unit = device_get_unit(dev);
408 sc->ad_disk = disk_alloc();
409 sc->ad_disk->d_drv1 = sc;
410 sc->ad_disk->d_name = "aacd";
411 sc->ad_disk->d_maxsize = aac_iosize_max;
412 sc->ad_disk->d_open = aac_disk_open;
413 sc->ad_disk->d_close = aac_disk_close;
414 sc->ad_disk->d_strategy = aac_disk_strategy;
415 sc->ad_disk->d_dump = aac_disk_dump;
416 sc->ad_disk->d_sectorsize = AAC_BLOCK_SIZE;
417 sc->ad_disk->d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE;
418 sc->ad_disk->d_fwsectors = sc->ad_sectors;
419 sc->ad_disk->d_fwheads = sc->ad_heads;
420 sc->ad_disk->d_unit = sc->unit;
421 disk_create(sc->ad_disk, DISK_VERSION);
422
423 return (0);
424 }
425
426 /*
427 * Disconnect ourselves from the system.
428 */
429 static int
430 aac_disk_detach(device_t dev)
431 {
432 struct aac_disk *sc;
433
434 sc = (struct aac_disk *)device_get_softc(dev);
435 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
436
437 if (sc->ad_flags & AAC_DISK_OPEN)
438 return(EBUSY);
439
440 disk_destroy(sc->ad_disk);
441
442 return(0);
443 }
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