Do a major clean-up of the BUSDMA architecture. A large number of
[dragonfly.git] / sys / dev / disk / buslogic / bt_isa.c
CommitLineData
984263bc
MD
1/*
2 * Product specific probe and attach routines for:
3 * Buslogic BT-54X and BT-445 cards
4 *
5 * Copyright (c) 1998, 1999 Justin T. Gibbs
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 * without modification, immediately at the beginning of the file.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
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 FOR
21 * 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 * $FreeBSD: src/sys/dev/buslogic/bt_isa.c,v 1.18 1999/10/12 21:35:43 dfr Exp $
1f7ab7c9 30 * $DragonFly: src/sys/dev/disk/buslogic/bt_isa.c,v 1.4 2006/10/25 20:55:53 dillon Exp $
984263bc
MD
31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
37#include <sys/bus.h>
984263bc
MD
38#include <sys/rman.h>
39
1f2de5d4
MD
40#include <bus/isa/isavar.h>
41#include "btreg.h"
984263bc 42
1f2de5d4 43#include <bus/cam/scsi/scsi_all.h>
984263bc
MD
44
45static bus_dma_filter_t btvlbouncefilter;
46static bus_dmamap_callback_t btmapsensebuffers;
47
48static int
49bt_isa_alloc_resources(device_t dev, u_long portstart, u_long portend)
50{
51 int rid;
52 struct resource *port;
53 struct resource *irq;
54 struct resource *drq;
55
56 rid = 0;
57 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
58 portstart, portend, BT_NREGS, RF_ACTIVE);
59 if (!port)
60 return (ENOMEM);
61
62 if (isa_get_irq(dev) != -1) {
63 rid = 0;
64 irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
65 0, ~0, 1, RF_ACTIVE);
66 if (!irq) {
67 if (port)
68 bus_release_resource(dev, SYS_RES_IOPORT,
69 0, port);
70 return (ENOMEM);
71 }
72 } else
73 irq = 0;
74
75 if (isa_get_drq(dev) != -1) {
76 rid = 0;
77 drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid,
78 0, ~0, 1, RF_ACTIVE);
79 if (!drq) {
80 if (port)
81 bus_release_resource(dev, SYS_RES_IOPORT,
82 0, port);
83 if (irq)
84 bus_release_resource(dev, SYS_RES_IRQ,
85 0, irq);
86 return (ENOMEM);
87 }
88 } else
89 drq = 0;
90
91 bt_init_softc(dev, port, irq, drq);
92
93 return (0);
94}
95
96static void
97bt_isa_release_resources(device_t dev)
98{
99 struct bt_softc *bt = device_get_softc(dev);
100
101 if (bt->port)
102 bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
103 if (bt->irq)
104 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
105 if (bt->drq)
106 bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
107 bt_free_softc(dev);
108}
109
110/*
111 * Check if the device can be found at the port given
112 * and if so, set it up ready for further work
113 * as an argument, takes the isa_device structure from
114 * autoconf.c
115 */
116static int
117bt_isa_probe(device_t dev)
118{
119 /*
120 * find unit and check we have that many defined
121 */
122 int port_index;
123 int max_port_index;
124
125 /* No pnp support */
126 if (isa_get_vendorid(dev))
127 return (ENXIO);
128
129 port_index = 0;
130 max_port_index = BT_NUM_ISAPORTS - 1;
131 /*
132 * Bound our board search if the user has
133 * specified an exact port.
134 */
135 bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index);
136
137 if (port_index < 0)
138 return (ENXIO);
139
140 /* Attempt to find an adapter */
141 for (;port_index <= max_port_index; port_index++) {
142 struct bt_probe_info info;
143 u_int ioport;
144
145 ioport = bt_iop_from_bio(port_index);
146
147 /*
148 * Ensure this port has not already been claimed already
149 * by a PCI, EISA or ISA adapter.
150 */
151 if (bt_check_probed_iop(ioport) != 0)
152 continue;
153
154 /* Initialise the softc for use during probing */
155 if (bt_isa_alloc_resources(dev, ioport,
156 ioport + BT_NREGS -1) != 0)
157 continue;
158
159 /* We're going to attempt to probe it now, so mark it probed */
160 bt_mark_probed_bio(port_index);
161
162 if (bt_port_probe(dev, &info) != 0) {
163 if (bootverbose)
164 printf("bt_isa_probe: Probe failed at 0x%x\n",
165 ioport);
166 bt_isa_release_resources(dev);
167 continue;
168 }
169
170 bt_isa_release_resources(dev);
171
172 bus_set_resource(dev, SYS_RES_DRQ, 0, info.drq, 1);
173 bus_set_resource(dev, SYS_RES_IRQ, 0, info.irq, 1);
174
175 return (0);
176 }
177
178 return (ENXIO);
179}
180
181/*
182 * Attach all the sub-devices we can find
183 */
184static int
185bt_isa_attach(device_t dev)
186{
187 struct bt_softc *bt = device_get_softc(dev);
188 bus_dma_filter_t *filter;
189 void *filter_arg;
190 bus_addr_t lowaddr;
191 int error, drq;
192
193 /* Initialise softc */
194 error = bt_isa_alloc_resources(dev, 0, ~0);
195 if (error) {
196 device_printf(dev, "can't allocate resources in bt_isa_attach\n");
197 return error;
198 }
199
200 /* Program the DMA channel for external control */
201 if ((drq = isa_get_drq(dev)) != -1)
202 isa_dmacascade(drq);
203
204 /* Allocate our parent dmatag */
205 filter = NULL;
206 filter_arg = NULL;
207 lowaddr = BUS_SPACE_MAXADDR_24BIT;
208 if (bt->model[0] == '4') {
209 /*
210 * This is a VL adapter. Typically, VL devices have access
211 * to the full 32bit address space. On BT-445S adapters
212 * prior to revision E, there is a hardware bug that causes
213 * corruption of transfers to/from addresses in the range of
214 * the BIOS modulo 16MB. The only properly functioning
215 * BT-445S Host Adapters have firmware version 3.37.
216 * If we encounter one of these adapters and the BIOS is
217 * installed, install a filter function for our bus_dma_map
218 * that will catch these accesses and bounce them to a safe
219 * region of memory.
220 */
221 if (bt->bios_addr != 0
222 && strcmp(bt->model, "445S") == 0
223 && strcmp(bt->firmware_ver, "3.37") < 0) {
224 filter = btvlbouncefilter;
225 filter_arg = bt;
226 } else {
227 lowaddr = BUS_SPACE_MAXADDR_32BIT;
228 }
229 }
230
231 /* XXX Should be a child of the ISA or VL bus dma tag */
232 if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
233 lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
234 filter, filter_arg,
235 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
236 /*nsegments*/BUS_SPACE_UNRESTRICTED,
237 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
238 /*flags*/0, &bt->parent_dmat) != 0) {
239 bt_isa_release_resources(dev);
240 return (ENOMEM);
241 }
242
243 error = bt_init(dev);
244 if (error) {
245 bt_isa_release_resources(dev);
246 return (ENOMEM);
247 }
248
249 if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
250 /* DMA tag for our sense buffers */
251 if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1,
252 /*boundary*/0,
253 /*lowaddr*/BUS_SPACE_MAXADDR,
254 /*highaddr*/BUS_SPACE_MAXADDR,
255 /*filter*/NULL, /*filterarg*/NULL,
256 bt->max_ccbs
257 * sizeof(struct scsi_sense_data),
258 /*nsegments*/1,
259 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
260 /*flags*/0, &bt->sense_dmat) != 0) {
261 bt_isa_release_resources(dev);
262 return (ENOMEM);
263 }
264
265 bt->init_level++;
266
267 /* Allocation of sense buffers */
268 if (bus_dmamem_alloc(bt->sense_dmat,
269 (void **)&bt->sense_buffers,
270 BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
271 bt_isa_release_resources(dev);
272 return (ENOMEM);
273 }
274
275 bt->init_level++;
276
277 /* And permanently map them */
278 bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
279 bt->sense_buffers,
280 bt->max_ccbs * sizeof(*bt->sense_buffers),
281 btmapsensebuffers, bt, /*flags*/0);
282
283 bt->init_level++;
284 }
285
286 error = bt_attach(dev);
287 if (error) {
288 bt_isa_release_resources(dev);
289 return (error);
290 }
291
292 return (0);
293}
294
295#define BIOS_MAP_SIZE (16 * 1024)
296
297static int
298btvlbouncefilter(void *arg, bus_addr_t addr)
299{
300 struct bt_softc *bt;
301
302 bt = (struct bt_softc *)arg;
303
304 addr &= BUS_SPACE_MAXADDR_24BIT;
305
306 if (addr == 0
307 || (addr >= bt->bios_addr
308 && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
309 return (1);
310 return (0);
311}
312
313static void
314btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
315{
316 struct bt_softc* bt;
317
318 bt = (struct bt_softc*)arg;
319 bt->sense_buffers_physbase = segs->ds_addr;
320}
321
322static device_method_t bt_isa_methods[] = {
323 /* Device interface */
324 DEVMETHOD(device_probe, bt_isa_probe),
325 DEVMETHOD(device_attach, bt_isa_attach),
326
327 { 0, 0 }
328};
329
330static driver_t bt_isa_driver = {
331 "bt",
332 bt_isa_methods,
333 sizeof(struct bt_softc),
334};
335
336static devclass_t bt_devclass;
337
338DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);