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
40 #include <sys/bus.h>
41 #include <sys/conf.h>
42 #include <sys/disk.h>
43
44 #include <vm/vm.h>
45 #include <vm/pmap.h>
46
47 #include <machine/md_var.h>
48 #include <machine/bus.h>
49 #include <sys/rman.h>
50
51 #include <dev/aac/aacreg.h>
52 #include <sys/aac_ioctl.h>
53 #include <dev/aac/aacvar.h>
54
55 /*
56 * Interface to parent.
57 */
58 static int aac_disk_probe(device_t dev);
59 static int aac_disk_attach(device_t dev);
60 static int aac_disk_detach(device_t dev);
61
62 /*
63 * Interface to the device switch.
64 */
65 static disk_open_t aac_disk_open;
66 static disk_close_t aac_disk_close;
67 static disk_strategy_t aac_disk_strategy;
68 static dumper_t aac_disk_dump;
69
70 static devclass_t aac_disk_devclass;
71
72 static device_method_t aac_disk_methods[] = {
73 DEVMETHOD(device_probe, aac_disk_probe),
74 DEVMETHOD(device_attach, aac_disk_attach),
75 DEVMETHOD(device_detach, aac_disk_detach),
76 DEVMETHOD_END
77 };
78
79 static driver_t aac_disk_driver = {
80 "aacd",
81 aac_disk_methods,
82 sizeof(struct aac_disk)
83 };
84
85 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, NULL, NULL);
86
87 /*
88 * Handle open from generic layer.
89 *
90 * This is called by the diskslice code on first open in order to get the
91 * basic device geometry paramters.
92 */
93 static int
aac_disk_open(struct disk * dp)94 aac_disk_open(struct disk *dp)
95 {
96 struct aac_disk *sc;
97
98 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
99
100 sc = (struct aac_disk *)dp->d_drv1;
101
102 if (sc == NULL) {
103 printf("aac_disk_open: No Softc\n");
104 return (ENXIO);
105 }
106
107 /* check that the controller is up and running */
108 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) {
109 device_printf(sc->ad_controller->aac_dev,
110 "Controller Suspended controller state = 0x%x\n",
111 sc->ad_controller->aac_state);
112 return(ENXIO);
113 }
114
115 sc->ad_flags |= AAC_DISK_OPEN;
116 return (0);
117 }
118
119 /*
120 * Handle last close of the disk device.
121 */
122 static int
aac_disk_close(struct disk * dp)123 aac_disk_close(struct disk *dp)
124 {
125 struct aac_disk *sc;
126
127 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
128
129 sc = (struct aac_disk *)dp->d_drv1;
130
131 if (sc == NULL)
132 return (ENXIO);
133
134 sc->ad_flags &= ~AAC_DISK_OPEN;
135 return (0);
136 }
137
138 /*
139 * Handle an I/O request.
140 */
141 static void
aac_disk_strategy(struct bio * bp)142 aac_disk_strategy(struct bio *bp)
143 {
144 struct aac_disk *sc;
145
146 sc = (struct aac_disk *)bp->bio_disk->d_drv1;
147 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
148
149 /* bogus disk? */
150 if (sc == NULL) {
151 bp->bio_flags |= BIO_ERROR;
152 bp->bio_error = EINVAL;
153 biodone(bp);
154 return;
155 }
156
157 /* do-nothing operation? */
158 if (bp->bio_bcount == 0) {
159 bp->bio_resid = bp->bio_bcount;
160 biodone(bp);
161 return;
162 }
163
164 /* perform accounting */
165
166 /* pass the bio to the controller - it can work out who we are */
167 mtx_lock(&sc->ad_controller->aac_io_lock);
168 aac_submit_bio(bp);
169 mtx_unlock(&sc->ad_controller->aac_io_lock);
170 }
171
172 /*
173 * Map the S/G elements for doing a dump.
174 */
175 static void
aac_dump_map_sg(void * arg,bus_dma_segment_t * segs,int nsegs,int error)176 aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
177 {
178 struct aac_fib *fib;
179 struct aac_blockwrite *bw;
180 struct aac_sg_table *sg;
181 int i;
182
183 fib = (struct aac_fib *)arg;
184 bw = (struct aac_blockwrite *)&fib->data[0];
185 sg = &bw->SgMap;
186
187 if (sg != NULL) {
188 sg->SgCount = nsegs;
189 for (i = 0; i < nsegs; i++) {
190 if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT)
191 return;
192 sg->SgEntry[i].SgAddress = segs[i].ds_addr;
193 sg->SgEntry[i].SgByteCount = segs[i].ds_len;
194 }
195 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry);
196 }
197 }
198
199 /*
200 * Map the S/G elements for doing a dump on 64-bit capable devices.
201 */
202 static void
aac_dump_map_sg64(void * arg,bus_dma_segment_t * segs,int nsegs,int error)203 aac_dump_map_sg64(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
204 {
205 struct aac_fib *fib;
206 struct aac_blockwrite64 *bw;
207 struct aac_sg_table64 *sg;
208 int i;
209
210 fib = (struct aac_fib *)arg;
211 bw = (struct aac_blockwrite64 *)&fib->data[0];
212 sg = &bw->SgMap64;
213
214 if (sg != NULL) {
215 sg->SgCount = nsegs;
216 for (i = 0; i < nsegs; i++) {
217 sg->SgEntry64[i].SgAddress = segs[i].ds_addr;
218 sg->SgEntry64[i].SgByteCount = segs[i].ds_len;
219 }
220 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry64);
221 }
222 }
223
224 /*
225 * Dump memory out to an array
226 *
227 * Send out one command at a time with up to maxio of data.
228 */
229 static int
aac_disk_dump(void * arg,void * virtual,vm_offset_t physical,off_t offset,size_t length)230 aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
231 {
232 struct aac_disk *ad;
233 struct aac_softc *sc;
234 struct aac_fib *fib;
235 size_t len, maxio;
236 int size;
237 static bus_dmamap_t dump_datamap;
238 static int first = 0;
239 struct disk *dp;
240 bus_dmamap_callback_t *callback;
241 u_int32_t command;
242
243 dp = arg;
244 ad = dp->d_drv1;
245
246 if (ad == NULL)
247 return (EINVAL);
248
249 sc= ad->ad_controller;
250
251 if (!first) {
252 first = 1;
253 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) {
254 device_printf(sc->aac_dev,
255 "bus_dmamap_create failed\n");
256 return (ENOMEM);
257 }
258 }
259
260 /* Skip aac_alloc_sync_fib(). We don't want to mess with sleep locks */
261 fib = &sc->aac_common->ac_sync_fib;
262
263 while (length > 0) {
264 maxio = sc->aac_max_sectors << 9;
265 len = (length > maxio) ? maxio : length;
266 if ((sc->flags & AAC_FLAGS_SG_64BIT) == 0) {
267 struct aac_blockwrite *bw;
268 bw = (struct aac_blockwrite *)&fib->data[0];
269 bw->Command = VM_CtBlockWrite;
270 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
271 bw->BlockNumber = offset / AAC_BLOCK_SIZE;
272 bw->ByteCount = len;
273 bw->Stable = CUNSTABLE;
274 command = ContainerCommand;
275 callback = aac_dump_map_sg;
276 size = sizeof(struct aac_blockwrite);
277 } else {
278 struct aac_blockwrite64 *bw;
279 bw = (struct aac_blockwrite64 *)&fib->data[0];
280 bw->Command = VM_CtHostWrite64;
281 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
282 bw->BlockNumber = offset / AAC_BLOCK_SIZE;
283 bw->SectorCount = len / AAC_BLOCK_SIZE;
284 bw->Pad = 0;
285 bw->Flags = 0;
286 command = ContainerCommand64;
287 callback = aac_dump_map_sg64;
288 size = sizeof(struct aac_blockwrite64);
289 }
290
291 /*
292 * There really isn't any way to recover from errors or
293 * resource shortages here. Oh well. Because of that, don't
294 * bother trying to send the command from the callback; there
295 * is too much required context.
296 */
297 if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual,
298 len, callback, fib, BUS_DMA_NOWAIT) != 0)
299 return (ENOMEM);
300
301 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
302 BUS_DMASYNC_PREWRITE);
303
304 /* fib->Header.Size is set in aac_dump_map_sg */
305 size += fib->Header.Size;
306
307 if (aac_sync_fib(sc, command, 0, fib, size)) {
308 device_printf(sc->aac_dev,
309 "Error dumping block 0x%jx\n",
310 (uintmax_t)physical);
311 return (EIO);
312 }
313
314 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
315 BUS_DMASYNC_POSTWRITE);
316
317 bus_dmamap_unload(sc->aac_buffer_dmat, dump_datamap);
318
319 length -= len;
320 offset += len;
321 virtual = (uint8_t *)virtual + len;
322 }
323
324 return (0);
325 }
326
327 /*
328 * Handle completion of an I/O request.
329 */
330 void
aac_biodone(struct bio * bp)331 aac_biodone(struct bio *bp)
332 {
333 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
334
335 if (bp->bio_flags & BIO_ERROR) {
336 bp->bio_resid = bp->bio_bcount;
337 disk_err(bp, "hard error", -1, 1);
338 }
339
340 biodone(bp);
341 }
342
343 /*
344 * Stub only.
345 */
346 static int
aac_disk_probe(device_t dev)347 aac_disk_probe(device_t dev)
348 {
349
350 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
351
352 return (0);
353 }
354
355 /*
356 * Attach a unit to the controller.
357 */
358 static int
aac_disk_attach(device_t dev)359 aac_disk_attach(device_t dev)
360 {
361 struct aac_disk *sc;
362
363 sc = (struct aac_disk *)device_get_softc(dev);
364 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
365
366 /* initialise our softc */
367 sc->ad_controller =
368 (struct aac_softc *)device_get_softc(device_get_parent(dev));
369 sc->ad_container = device_get_ivars(dev);
370 sc->ad_dev = dev;
371
372 /*
373 * require that extended translation be enabled - other drivers read the
374 * disk!
375 */
376 sc->ad_size = sc->ad_container->co_mntobj.Capacity;
377 if (sc->ad_controller->flags & AAC_FLAGS_LBA_64BIT)
378 sc->ad_size += (u_int64_t)
379 sc->ad_container->co_mntobj.CapacityHigh << 32;
380 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */
381 sc->ad_heads = 255;
382 sc->ad_sectors = 63;
383 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */
384 sc->ad_heads = 128;
385 sc->ad_sectors = 32;
386 } else {
387 sc->ad_heads = 64;
388 sc->ad_sectors = 32;
389 }
390 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
391
392 device_printf(dev, "%juMB (%ju sectors)\n",
393 (intmax_t)sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
394 (intmax_t)sc->ad_size);
395
396 /* attach a generic disk device to ourselves */
397 sc->unit = device_get_unit(dev);
398 sc->ad_disk = disk_alloc();
399 sc->ad_disk->d_drv1 = sc;
400 sc->ad_disk->d_flags = DISKFLAG_UNMAPPED_BIO;
401 sc->ad_disk->d_name = "aacd";
402 sc->ad_disk->d_maxsize = sc->ad_controller->aac_max_sectors << 9;
403 sc->ad_disk->d_open = aac_disk_open;
404 sc->ad_disk->d_close = aac_disk_close;
405 sc->ad_disk->d_strategy = aac_disk_strategy;
406 sc->ad_disk->d_dump = aac_disk_dump;
407 sc->ad_disk->d_sectorsize = AAC_BLOCK_SIZE;
408 sc->ad_disk->d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE;
409 sc->ad_disk->d_fwsectors = sc->ad_sectors;
410 sc->ad_disk->d_fwheads = sc->ad_heads;
411 sc->ad_disk->d_unit = sc->unit;
412 disk_create(sc->ad_disk, DISK_VERSION);
413
414 return (0);
415 }
416
417 /*
418 * Disconnect ourselves from the system.
419 */
420 static int
aac_disk_detach(device_t dev)421 aac_disk_detach(device_t dev)
422 {
423 struct aac_disk *sc;
424
425 sc = (struct aac_disk *)device_get_softc(dev);
426 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
427
428 if (sc->ad_flags & AAC_DISK_OPEN)
429 return(EBUSY);
430
431 disk_destroy(sc->ad_disk);
432
433 return(0);
434 }
435