]> CyberLeo.Net >> Repos - FreeBSD/releng/8.1.git/blob - sys/dev/aac/aac_disk.c
Copy stable/8 to releng/8.1 in preparation for 8.1-RC1.
[FreeBSD/releng/8.1.git] / 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
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         { 0, 0 }
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, 0, 0);
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
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                 printf("Controller Suspended controller state = 0x%x\n",
110                        sc->ad_controller->aac_state);
111                 return(ENXIO);
112         }
113
114         sc->ad_flags |= AAC_DISK_OPEN;
115         return (0);
116 }
117
118 /*
119  * Handle last close of the disk device.
120  */
121 static int
122 aac_disk_close(struct disk *dp)
123 {
124         struct aac_disk *sc;
125
126         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
127
128         sc = (struct aac_disk *)dp->d_drv1;
129         
130         if (sc == NULL)
131                 return (ENXIO);
132
133         sc->ad_flags &= ~AAC_DISK_OPEN;
134         return (0);
135 }
136
137 /*
138  * Handle an I/O request.
139  */
140 static void
141 aac_disk_strategy(struct bio *bp)
142 {
143         struct aac_disk *sc;
144
145         sc = (struct aac_disk *)bp->bio_disk->d_drv1;
146         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
147
148         /* bogus disk? */
149         if (sc == NULL) {
150                 bp->bio_flags |= BIO_ERROR;
151                 bp->bio_error = EINVAL;
152                 biodone(bp);
153                 return;
154         }
155
156         /* do-nothing operation? */
157         if (bp->bio_bcount == 0) {
158                 bp->bio_resid = bp->bio_bcount;
159                 biodone(bp);
160                 return;
161         }
162
163         /* perform accounting */
164
165         /* pass the bio to the controller - it can work out who we are */
166         mtx_lock(&sc->ad_controller->aac_io_lock);
167         aac_submit_bio(bp);
168         mtx_unlock(&sc->ad_controller->aac_io_lock);
169
170         return;
171 }
172
173 /*
174  * Map the S/G elements for doing a dump.
175  */
176 static void
177 aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
178 {
179         struct aac_fib *fib;
180         struct aac_blockwrite *bw;
181         struct aac_sg_table *sg;
182         int i;
183
184         fib = (struct aac_fib *)arg;
185         bw = (struct aac_blockwrite *)&fib->data[0];
186         sg = &bw->SgMap;
187
188         if (sg != NULL) {
189                 sg->SgCount = nsegs;
190                 for (i = 0; i < nsegs; i++) {
191                         if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT)
192                                 return;
193                         sg->SgEntry[i].SgAddress = segs[i].ds_addr;
194                         sg->SgEntry[i].SgByteCount = segs[i].ds_len;
195                 }
196                 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry);
197         }
198 }
199
200 /*
201  * Map the S/G elements for doing a dump on 64-bit capable devices.
202  */
203 static void
204 aac_dump_map_sg64(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
205 {
206         struct aac_fib *fib;
207         struct aac_blockwrite64 *bw;
208         struct aac_sg_table64 *sg;
209         int i;
210
211         fib = (struct aac_fib *)arg;
212         bw = (struct aac_blockwrite64 *)&fib->data[0];
213         sg = &bw->SgMap64;
214
215         if (sg != NULL) {
216                 sg->SgCount = nsegs;
217                 for (i = 0; i < nsegs; i++) {
218                         sg->SgEntry64[i].SgAddress = segs[i].ds_addr;
219                         sg->SgEntry64[i].SgByteCount = segs[i].ds_len;
220                 }
221                 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry64);
222         }
223 }
224
225 /*
226  * Dump memory out to an array
227  *
228  * Send out one command at a time with up to maxio of data.
229  */
230 static int
231 aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
232 {
233         struct aac_disk *ad;
234         struct aac_softc *sc;
235         struct aac_fib *fib;
236         size_t len, maxio;
237         int size;
238         static bus_dmamap_t dump_datamap;
239         static int first = 0;
240         struct disk *dp;
241         bus_dmamap_callback_t *callback;
242         u_int32_t command;
243
244         dp = arg;
245         ad = dp->d_drv1;
246
247         if (ad == NULL)
248                 return (EINVAL);
249
250         sc= ad->ad_controller;
251
252         if (!first) {
253                 first = 1;
254                 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) {
255                         printf("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                         printf("Error dumping block 0x%jx\n",
309                                (uintmax_t)physical);
310                         return (EIO);
311                 }
312
313                 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
314                     BUS_DMASYNC_POSTWRITE);
315
316                 bus_dmamap_unload(sc->aac_buffer_dmat, dump_datamap);
317
318                 length -= len;
319                 offset += len;
320                 virtual = (uint8_t *)virtual + len;
321         }
322
323         return (0);
324 }
325
326 /*
327  * Handle completion of an I/O request.
328  */
329 void
330 aac_biodone(struct bio *bp)
331 {
332         struct aac_disk *sc;
333
334         sc = (struct aac_disk *)bp->bio_disk->d_drv1;
335         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
336
337         if (bp->bio_flags & BIO_ERROR)
338                 disk_err(bp, "hard error", -1, 1);
339
340         biodone(bp);
341 }
342
343 /*
344  * Stub only.
345  */
346 static int
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
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_name = "aacd";
401         sc->ad_disk->d_maxsize = sc->ad_controller->aac_max_sectors << 9;
402         sc->ad_disk->d_open = aac_disk_open;
403         sc->ad_disk->d_close = aac_disk_close;
404         sc->ad_disk->d_strategy = aac_disk_strategy;
405         sc->ad_disk->d_dump = aac_disk_dump;
406         sc->ad_disk->d_sectorsize = AAC_BLOCK_SIZE;
407         sc->ad_disk->d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE;
408         sc->ad_disk->d_fwsectors = sc->ad_sectors;
409         sc->ad_disk->d_fwheads = sc->ad_heads;
410         sc->ad_disk->d_unit = sc->unit;
411         disk_create(sc->ad_disk, DISK_VERSION);
412
413         return (0);
414 }
415
416 /*
417  * Disconnect ourselves from the system.
418  */
419 static int
420 aac_disk_detach(device_t dev)
421 {
422         struct aac_disk *sc;
423
424         sc = (struct aac_disk *)device_get_softc(dev);
425         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
426
427         if (sc->ad_flags & AAC_DISK_OPEN)
428                 return(EBUSY);
429
430         disk_destroy(sc->ad_disk);
431
432         return(0);
433 }