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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 }