Change the kernel dev_t, representing a pointer to a specinfo structure,
[dragonfly.git] / sys / dev / raid / ips / ips_disk.c
1 /*-
2  * Written by: David Jeffery
3  * Copyright (c) 2002 Adaptec Inc.
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  *
27  * $FreeBSD: src/sys/dev/ips/ips_disk.c,v 1.4 2003/09/22 04:59:07 njl Exp $
28  * $DragonFly: src/sys/dev/raid/ips/ips_disk.c,v 1.10 2006/09/10 01:26:35 dillon Exp $
29  */
30
31 #include <sys/devicestat.h>
32 #include <dev/raid/ips/ips.h>
33 #include <dev/raid/ips/ips_disk.h>
34 #include <sys/stat.h>
35
36 #include <vm/vm.h>
37 #include <vm/pmap.h>
38 #include <machine/md_var.h>
39
40 static int ipsd_probe(device_t dev);
41 static int ipsd_attach(device_t dev);
42 static int ipsd_detach(device_t dev);
43
44 #if 0
45 static int ipsd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length);
46 static void ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs,
47                              int error);
48 static void ipsd_dump_block_complete(ips_command_t *command);
49 #endif
50
51 static d_open_t ipsd_open;
52 static d_close_t ipsd_close;
53 static d_strategy_t ipsd_strategy;
54 static d_dump_t ipsd_dump_helper;
55
56 static struct dev_ops ipsd_ops = {
57         { "ipsd", IPSD_CDEV_MAJOR, D_DISK },
58         .d_open =       ipsd_open,
59         .d_close =      ipsd_close,
60         .d_strategy =   ipsd_strategy,
61         .d_read =       physread,
62         .d_write =      physwrite,
63         .d_dump =       ipsd_dump_helper,
64 };
65
66 static device_method_t ipsd_methods[] = {
67         DEVMETHOD(device_probe,         ipsd_probe),
68         DEVMETHOD(device_attach,        ipsd_attach),
69         DEVMETHOD(device_detach,        ipsd_detach),
70         { 0, 0 }
71 };
72
73
74 static driver_t ipsd_driver = {
75         "ipsd",
76         ipsd_methods,
77         sizeof(ipsdisk_softc_t)
78 };
79
80 static devclass_t ipsd_devclass;
81 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
82
83 /*
84  * handle opening of disk device.  It must set up all information about
85  * the geometry and size of the disk
86  */
87 static int
88 ipsd_open(struct dev_open_args *ap)
89 {
90         cdev_t dev = ap->a_head.a_dev;
91         ipsdisk_softc_t *dsc = dev->si_drv1;
92
93         if (dsc == NULL)
94                 return (ENXIO);
95         dsc->state |= IPS_DEV_OPEN;
96         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
97         return 0;
98 }
99
100 static int
101 ipsd_close(struct dev_close_args *ap)
102 {
103         cdev_t dev = ap->a_head.a_dev;
104         ipsdisk_softc_t *dsc = dev->si_drv1;
105
106         dsc->state &= ~IPS_DEV_OPEN;
107         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
108         return 0;
109 }
110
111 /* ipsd_finish is called to clean up and return a completed IO request */
112 void
113 ipsd_finish(struct bio *bio)
114 {
115         struct buf *bp = bio->bio_buf;
116         ipsdisk_softc_t *dsc;
117
118         dsc = bio->bio_driver_info;
119         if (bp->b_flags & B_ERROR) {
120                 device_printf(dsc->dev, "iobuf error %d\n", bp->b_error);
121         } else {
122                 bp->b_resid = 0;
123         }
124         devstat_end_transaction_buf(&dsc->stats, bp);
125         biodone(bio);
126         ips_start_io_request(dsc->sc);
127 }
128
129
130 static int
131 ipsd_strategy(struct dev_strategy_args *ap)
132 {
133         cdev_t dev = ap->a_head.a_dev;
134         struct bio *bio = ap->a_bio;
135         ipsdisk_softc_t *dsc;
136
137         dsc = dev->si_drv1;
138         DEVICE_PRINTF(8, dsc->dev, "in strategy\n");
139         bio->bio_driver_info = dsc;
140         devstat_start_transaction(&dsc->stats);
141         lockmgr(&dsc->sc->queue_lock, LK_EXCLUSIVE|LK_RETRY);
142         bioq_insert_tail(&dsc->sc->bio_queue, bio);
143         ips_start_io_request(dsc->sc);
144         lockmgr(&dsc->sc->queue_lock, LK_RELEASE);
145         return(0);
146 }
147
148 static int
149 ipsd_probe(device_t dev)
150 {
151         DEVICE_PRINTF(2, dev, "in probe\n");
152         device_set_desc(dev, "Logical Drive");
153         return 0;
154 }
155
156 static int
157 ipsd_attach(device_t dev)
158 {
159         device_t adapter;
160         ipsdisk_softc_t *dsc;
161         struct  disklabel *label;
162         u_int totalsectors;
163         u_int nheads, nsectors;
164
165         DEVICE_PRINTF(2, dev, "in attach\n");
166         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
167         bzero(dsc, sizeof(ipsdisk_softc_t));
168         adapter = device_get_parent(dev);
169         dsc->dev = dev;
170         dsc->sc = device_get_softc(adapter);
171         dsc->unit = device_get_unit(dev);
172         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
173         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
174         if ((totalsectors > 0x400000) &&
175             ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
176                 nheads = IPS_NORM_HEADS;
177                 nsectors = IPS_NORM_SECTORS;
178         } else {
179                 nheads = IPS_COMP_HEADS;
180                 nsectors = IPS_COMP_SECTORS;
181         }
182         devstat_add_entry(&dsc->stats, "ipsd", dsc->unit, DEV_BSIZE,
183                           DEVSTAT_NO_ORDERED_TAGS,
184                           DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_SCSI,
185                           DEVSTAT_PRIORITY_DISK);
186         dsc->ipsd_dev_t = disk_create(dsc->unit, &dsc->ipsd_disk, 0, &ipsd_ops);
187         dsc->ipsd_dev_t->si_drv1 = dsc;
188         dsc->ipsd_dev_t->si_iosize_max = IPS_MAX_IO_SIZE;
189         label = &dsc->ipsd_disk.d_label;
190         bzero(label, sizeof(*label));
191         label->d_ntracks    = nheads;
192         label->d_nsectors   = nsectors;
193         label->d_type       = DTYPE_ESDI;
194         label->d_secsize    = IPS_BLKSIZE;
195         label->d_ncylinders = totalsectors / nheads / nsectors;
196         label->d_secpercyl  = nsectors / nheads;
197         label->d_secperunit = totalsectors;
198         device_printf(dev, "Logical Drive  (%dMB)\n",
199             dsc->sc->drives[dsc->disk_number].sector_count >> 11);
200         return 0;
201 }
202
203 static int
204 ipsd_detach(device_t dev)
205 {
206         ipsdisk_softc_t *dsc;
207
208         DEVICE_PRINTF(2, dev, "in detach\n");
209         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
210         if (dsc->state & IPS_DEV_OPEN)
211                 return (EBUSY);
212         devstat_remove_entry(&dsc->stats);
213         disk_destroy(&dsc->ipsd_disk);
214         return 0;
215 }
216
217 static int
218 ipsd_dump_helper(struct dev_dump_args *ap)
219 {
220         printf("dump support for IPS not yet working, will not dump\n");
221         return (ENODEV);
222
223 #if 0
224         long blkcnt;
225         caddr_t va;
226         vm_offset_t addr, a;
227         int dumppages = MAXDUMPPGS;
228         int i;
229
230         addr = 0;
231         blkcnt = howmany(PAGE_SIZE, secsize);
232         while (count > 0) {
233                 va = NULL;
234                 if (count / blkcnt < dumppages)
235                         dumppages = count / blkcnt;
236                 for (i = 0; i < dumppages; i++) {
237                         a = addr + (i * PAGE_SIZE);
238                         if (!is_physical_memory(a))
239                                 a = 0;
240                         va = pmap_kenter_temporary(trunc_page(a), i);
241                 }
242
243                 ipsd_dump(dev, va, 0, blkno, PAGE_SIZE * dumppages);
244                 if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0)
245                         return (EINTR);
246                 blkno += blkcnt * dumppages;
247                 count -= blkcnt * dumppages;
248                 addr += PAGE_SIZE * dumppages;
249         }
250         return (0);
251 #endif
252 }
253
254 #if 0
255
256 static int
257 ipsd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset,
258           size_t length)
259 {
260         cdev_t dev = arg;
261         ips_softc_t *sc;
262         ips_command_t *command;
263         ips_io_cmd *command_struct;
264         ipsdisk_softc_t *dsc;
265         off_t off;
266         uint8_t *va;
267         int len;
268         int error = 0;
269
270         dsc = dev->si_drv1;
271         if (dsc == NULL)
272                 return (EINVAL);
273         sc = dsc->sc;
274
275         if (ips_get_free_cmd(sc, &command, 0) != 0) {
276                 printf("ipsd: failed to get cmd for dump\n");
277                 return (ENOMEM);
278         }
279
280         command->data_dmatag = sc->sg_dmatag;
281         command->callback = ipsd_dump_block_complete;
282
283         command_struct = (ips_io_cmd *)command->command_buffer;
284         command_struct->id = command->id;
285         command_struct->drivenum = sc->drives[dsc->disk_number].drivenum;
286
287         off = offset;
288         va = virtual;
289
290         while (length > 0) {
291                 len = length > IPS_MAX_IO_SIZE ? IPS_MAX_IO_SIZE : length;
292                 command_struct->lba = off / IPS_BLKSIZE;
293                 if (bus_dmamap_load(command->data_dmatag, command->data_dmamap,
294                     va, len, ipsd_dump_map_sg, command, 0) != 0) {
295                         error = EIO;
296                         break;
297                 }
298                 if (COMMAND_ERROR(&command->status)) {
299                         error = EIO;
300                         break;
301                 }
302
303                 length -= len;
304                 off += len;
305                 va += len;
306         }
307         ips_insert_free_cmd(command->sc, command);
308         return(error);
309 }
310
311 static void
312 ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
313 {
314         ips_softc_t *sc;
315         ips_command_t *command;
316         ips_sg_element_t *sg_list;
317         ips_io_cmd *command_struct;
318         int i, length;
319
320         command = (ips_command_t *)arg;
321         sc = command->sc;
322         length = 0;
323
324         if (error) {
325                 printf("ipsd_dump_map_sg: error %d\n", error);
326                 command->status.value = IPS_ERROR_STATUS;
327                 return;
328         }
329
330         command_struct = (ips_io_cmd *)command->command_buffer;
331
332         if (nsegs != 1) {
333                 command_struct->segnum = nsegs;
334                 sg_list = (ips_sg_element_t *)((uint8_t *)
335                     command->command_buffer + IPS_COMMAND_LEN);
336                 for (i = 0; i < nsegs; i++) {
337                         sg_list[i].addr = segs[i].ds_addr;
338                         sg_list[i].len = segs[i].ds_len;
339                         length += segs[i].ds_len;
340                 }
341                 command_struct->buffaddr =
342                     (uint32_t)command->command_phys_addr + IPS_COMMAND_LEN;
343                 command_struct->command = IPS_SG_WRITE_CMD;
344         } else {
345                 command_struct->buffaddr = segs[0].ds_addr;
346                 length = segs[0].ds_len;
347                 command_struct->segnum = 0;
348                 command_struct->command = IPS_WRITE_CMD;
349         }
350
351         length = (length + IPS_BLKSIZE - 1) / IPS_BLKSIZE;
352         command_struct->length = length;
353         bus_dmamap_sync(sc->command_dmatag, command->command_dmamap,
354             BUS_DMASYNC_PREWRITE);
355         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
356             BUS_DMASYNC_PREWRITE);
357
358         sc->ips_issue_cmd(command);
359         sc->ips_poll_cmd(command);
360         return;
361 }
362
363 static void
364 ipsd_dump_block_complete(ips_command_t *command)
365 {
366         if (COMMAND_ERROR(&command->status)) {
367                 printf("ipsd_dump completion error= 0x%x\n",
368                        command->status.value);
369         }
370         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
371             BUS_DMASYNC_POSTWRITE);
372         bus_dmamap_unload(command->data_dmatag, command->data_dmamap);
373 }
374
375 #endif