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>
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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/sysctl.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 <dev/aac/aac_ioctl.h>
53#include <dev/aac/aacvar.h>
54
55/*
56 * Interface to parent.
57 */
58static int aac_disk_probe(device_t dev);
59static int aac_disk_attach(device_t dev);
60static int aac_disk_detach(device_t dev);
61
62/*
63 * Interface to the device switch.
64 */
65static disk_open_t aac_disk_open;
66static disk_close_t aac_disk_close;
67static disk_strategy_t aac_disk_strategy;
68static dumper_t aac_disk_dump;
69
70static devclass_t aac_disk_devclass;
71
72static 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
79static driver_t aac_disk_driver = {
80 "aacd",
81 aac_disk_methods,
82 sizeof(struct aac_disk)
83};
84
85#define AAC_MAXIO 65536
86
87DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0);
88
89/* sysctl tunables */
90static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */
91TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max);
92
93SYSCTL_DECL(_hw_aac);
94SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RDTUN, &aac_iosize_max, 0,
95 "Max I/O size per transfer to an array");
96
97/*
98 * Handle open from generic layer.
99 *
100 * This is called by the diskslice code on first open in order to get the
101 * basic device geometry paramters.
102 */
103static int
104aac_disk_open(struct disk *dp)
105{
106 struct aac_disk *sc;
107
108 debug_called(4);
109
110 sc = (struct aac_disk *)dp->d_drv1;
111
112 if (sc == NULL) {
113 printf("aac_disk_open: No Softc\n");
114 return (ENXIO);
115 }
116
117 /* check that the controller is up and running */
118 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) {
119 printf("Controller Suspended controller state = 0x%x\n",
120 sc->ad_controller->aac_state);
121 return(ENXIO);
122 }
123
124 sc->ad_flags |= AAC_DISK_OPEN;
125 return (0);
126}
127
128/*
129 * Handle last close of the disk device.
130 */
131static int
132aac_disk_close(struct disk *dp)
133{
134 struct aac_disk *sc;
135
136 debug_called(4);
137
138 sc = (struct aac_disk *)dp->d_drv1;
139
140 if (sc == NULL)
141 return (ENXIO);
142
143 sc->ad_flags &= ~AAC_DISK_OPEN;
144 return (0);
145}
146
147/*
148 * Handle an I/O request.
149 */
150static void
151aac_disk_strategy(struct bio *bp)
152{
153 struct aac_disk *sc;
154
155 debug_called(4);
156
157 sc = (struct aac_disk *)bp->bio_disk->d_drv1;
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 AAC_LOCK_ACQUIRE(&sc->ad_controller->aac_io_lock);
178 aac_submit_bio(bp);
179 AAC_LOCK_RELEASE(&sc->ad_controller->aac_io_lock);
180
181 return;
182}
183
184/*
185 * Map the S/G elements for doing a dump.
186 *
187 * XXX This does not handle >4GB of RAM. Fixing it is possible except on
188 * adapters that cannot do 64bit s/g lists.
189 */
190static void
191aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
192{
193 struct aac_fib *fib;
194 struct aac_blockwrite *bw;
195 struct aac_sg_table *sg;
196 int i;
197
198 fib = (struct aac_fib *)arg;
199 bw = (struct aac_blockwrite *)&fib->data[0];
200 sg = &bw->SgMap;
201
202 if (sg != NULL) {
203 sg->SgCount = nsegs;
204 for (i = 0; i < nsegs; i++) {
205 if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT)
206 return;
207 sg->SgEntry[i].SgAddress = segs[i].ds_addr;
208 sg->SgEntry[i].SgByteCount = segs[i].ds_len;
209 }
210 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry);
211 }
212}
213
214/*
215 * Dump memory out to an array
216 *
217 * Send out one command at a time with up to AAC_MAXIO of data.
218 */
219static int
220aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
221{
222 struct aac_disk *ad;
223 struct aac_softc *sc;
224 struct aac_fib *fib;
225 struct aac_blockwrite *bw;
226 size_t len;
227 int size;
228 static bus_dmamap_t dump_datamap;
229 static int first = 0;
230 struct disk *dp;
231
232 dp = arg;
233 ad = dp->d_drv1;
234
235 if (ad == NULL)
236 return (EINVAL);
237
238 sc= ad->ad_controller;
239
240 if (!first) {
241 first = 1;
242 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) {
243 printf("bus_dmamap_create failed\n");
244 return (ENOMEM);
245 }
246 }
247
248 aac_alloc_sync_fib(sc, &fib, AAC_SYNC_LOCK_FORCE);
249 bw = (struct aac_blockwrite *)&fib->data[0];
250
251 while (length > 0) {
252 len = (length > AAC_MAXIO) ? AAC_MAXIO : length;
253 bw->Command = VM_CtBlockWrite;
254 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
255 bw->BlockNumber = offset / AAC_BLOCK_SIZE;
256 bw->ByteCount = len;
257 bw->Stable = CUNSTABLE;
258
259 /*
260 * There really isn't any way to recover from errors or
261 * resource shortages here. Oh well. Because of that, don't
262 * bother trying to send the command from the callback; there
263 * is too much required context.
264 */
265 if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual,
266 len, aac_dump_map_sg, fib, 0) != 0)
267 return (EIO);
268
269 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
270 BUS_DMASYNC_PREWRITE);
271
272 /* fib->Header.Size is set in aac_dump_map_sg */
273 size = fib->Header.Size + sizeof(struct aac_blockwrite);
274
275 if (aac_sync_fib(sc, ContainerCommand, 0, fib, size)) {
276 printf("Error dumping block 0x%jx\n",
277 (uintmax_t)physical);
278 return (EIO);
279 }
280
281 length -= len;
282 offset += len;
283 (vm_offset_t)virtual += len;
284 }
285
286 return (0);
287}
288
289/*
290 * Handle completion of an I/O request.
291 */
292void
293aac_biodone(struct bio *bp)
294{
295 struct aac_disk *sc;
296
297 debug_called(4);
298
299 sc = (struct aac_disk *)bp->bio_disk->d_drv1;
300
301 if (bp->bio_flags & BIO_ERROR)
302 disk_err(bp, "hard error", -1, 1);
303
304 biodone(bp);
305}
306
307/*
308 * Stub only.
309 */
310static int
311aac_disk_probe(device_t dev)
312{
313
314 debug_called(2);
315
316 return (0);
317}
318
319/*
320 * Attach a unit to the controller.
321 */
322static int
323aac_disk_attach(device_t dev)
324{
325 struct aac_disk *sc;
326
327 debug_called(1);
328
329 sc = (struct aac_disk *)device_get_softc(dev);
330
331 /* initialise our softc */
332 sc->ad_controller =
333 (struct aac_softc *)device_get_softc(device_get_parent(dev));
334 sc->ad_container = device_get_ivars(dev);
335 sc->ad_dev = dev;
336
337 /*
338 * require that extended translation be enabled - other drivers read the
339 * disk!
340 */
341 sc->ad_size = sc->ad_container->co_mntobj.Capacity;
342 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */
343 sc->ad_heads = 255;
344 sc->ad_sectors = 63;
345 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */
346 sc->ad_heads = 128;
347 sc->ad_sectors = 32;
348 } else {
349 sc->ad_heads = 64;
350 sc->ad_sectors = 32;
351 }
352 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
353
354 device_printf(dev, "%uMB (%u sectors)\n",
355 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
356 sc->ad_size);
357
358 /* attach a generic disk device to ourselves */
359 sc->unit = device_get_unit(dev);
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