1 /*-
2 * Product specific probe and attach routines for:
3 * Buslogic BT-54X and BT-445 cards
4 *
5 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
6 *
7 * Copyright (c) 1998, 1999 Justin T. Gibbs
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions, and the following disclaimer,
15 * without modification, immediately at the beginning of the file.
16 * 2. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: stable/12/sys/dev/buslogic/bt_isa.c 326255 2017-11-27 14:52:40Z pfg $");
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42 #include <sys/bus.h>
43
44 #include <machine/bus.h>
45 #include <machine/resource.h>
46 #include <sys/rman.h>
47
48 #include <isa/isavar.h>
49 #include <dev/buslogic/btreg.h>
50
51 #include <cam/scsi/scsi_all.h>
52
53 static bus_dma_filter_t btvlbouncefilter;
54 static bus_dmamap_callback_t btmapsensebuffers;
55
56 static int
bt_isa_alloc_resources(device_t dev,u_long portstart,u_long portend)57 bt_isa_alloc_resources(device_t dev, u_long portstart, u_long portend)
58 {
59 int rid;
60 struct resource *port;
61 struct resource *irq;
62 struct resource *drq;
63
64 rid = 0;
65 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
66 portstart, portend, BT_NREGS, RF_ACTIVE);
67 if (!port)
68 return (ENOMEM);
69
70 if (isa_get_irq(dev) != -1) {
71 rid = 0;
72 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
73 if (!irq) {
74 if (port)
75 bus_release_resource(dev, SYS_RES_IOPORT,
76 0, port);
77 return (ENOMEM);
78 }
79 } else
80 irq = NULL;
81
82 if (isa_get_drq(dev) != -1) {
83 rid = 0;
84 drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, &rid, RF_ACTIVE);
85 if (!drq) {
86 if (port)
87 bus_release_resource(dev, SYS_RES_IOPORT,
88 0, port);
89 if (irq)
90 bus_release_resource(dev, SYS_RES_IRQ,
91 0, irq);
92 return (ENOMEM);
93 }
94 } else
95 drq = NULL;
96
97 bt_init_softc(dev, port, irq, drq);
98
99 return (0);
100 }
101
102 static void
bt_isa_release_resources(device_t dev)103 bt_isa_release_resources(device_t dev)
104 {
105 struct bt_softc *bt = device_get_softc(dev);
106
107 if (bt->port)
108 bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
109 if (bt->irq)
110 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
111 if (bt->drq)
112 bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
113 bt_free_softc(dev);
114 }
115
116 /*
117 * Check if the device can be found at the port given
118 * and if so, set it up ready for further work
119 * as an argument, takes the isa_device structure from
120 * autoconf.c
121 */
122 static int
bt_isa_probe(device_t dev)123 bt_isa_probe(device_t dev)
124 {
125 /*
126 * find unit and check we have that many defined
127 */
128 int port_index;
129 int max_port_index;
130
131 /* No pnp support */
132 if (isa_get_vendorid(dev))
133 return (ENXIO);
134
135 port_index = 0;
136 max_port_index = BT_NUM_ISAPORTS - 1;
137 /*
138 * Bound our board search if the user has
139 * specified an exact port.
140 */
141 bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index);
142
143 if (port_index < 0)
144 return (ENXIO);
145
146 /* Attempt to find an adapter */
147 for (;port_index <= max_port_index; port_index++) {
148 struct bt_probe_info info;
149 u_int ioport;
150
151 ioport = bt_iop_from_bio(port_index);
152
153 /*
154 * Ensure this port has not already been claimed already
155 * by a PCI, ISA adapter.
156 */
157 if (bt_check_probed_iop(ioport) != 0)
158 continue;
159
160 /* Initialise the softc for use during probing */
161 if (bt_isa_alloc_resources(dev, ioport,
162 ioport + BT_NREGS -1) != 0)
163 continue;
164
165 /* We're going to attempt to probe it now, so mark it probed */
166 bt_mark_probed_bio(port_index);
167
168 if (bt_port_probe(dev, &info) != 0) {
169 if (bootverbose)
170 printf("bt_isa_probe: Probe failed at 0x%x\n",
171 ioport);
172 bt_isa_release_resources(dev);
173 continue;
174 }
175
176 bt_isa_release_resources(dev);
177
178 bus_set_resource(dev, SYS_RES_DRQ, 0, info.drq, 1);
179 bus_set_resource(dev, SYS_RES_IRQ, 0, info.irq, 1);
180
181 return (BUS_PROBE_DEFAULT);
182 }
183
184 return (ENXIO);
185 }
186
187 /*
188 * Attach all the sub-devices we can find
189 */
190 static int
bt_isa_attach(device_t dev)191 bt_isa_attach(device_t dev)
192 {
193 struct bt_softc *bt = device_get_softc(dev);
194 bus_dma_filter_t *filter;
195 void *filter_arg;
196 bus_addr_t lowaddr;
197 int error, drq;
198
199 /* Initialise softc */
200 error = bt_isa_alloc_resources(dev, 0, ~0);
201 if (error) {
202 device_printf(dev, "can't allocate resources in bt_isa_attach\n");
203 return error;
204 }
205
206 /* Program the DMA channel for external control */
207 if ((drq = isa_get_drq(dev)) != -1)
208 isa_dmacascade(drq);
209
210 /* Allocate our parent dmatag */
211 filter = NULL;
212 filter_arg = NULL;
213 lowaddr = BUS_SPACE_MAXADDR_24BIT;
214 if (bt->model[0] == '4') {
215 /*
216 * This is a VL adapter. Typically, VL devices have access
217 * to the full 32bit address space. On BT-445S adapters
218 * prior to revision E, there is a hardware bug that causes
219 * corruption of transfers to/from addresses in the range of
220 * the BIOS modulo 16MB. The only properly functioning
221 * BT-445S Host Adapters have firmware version 3.37.
222 * If we encounter one of these adapters and the BIOS is
223 * installed, install a filter function for our bus_dma_map
224 * that will catch these accesses and bounce them to a safe
225 * region of memory.
226 */
227 if (bt->bios_addr != 0
228 && strcmp(bt->model, "445S") == 0
229 && strcmp(bt->firmware_ver, "3.37") < 0) {
230 filter = btvlbouncefilter;
231 filter_arg = bt;
232 } else {
233 lowaddr = BUS_SPACE_MAXADDR_32BIT;
234 }
235 }
236
237 /* XXX Should be a child of the ISA or VL bus dma tag */
238 if (bus_dma_tag_create( /* parent */ bus_get_dma_tag(dev),
239 /* alignemnt */ 1,
240 /* boundary */ 0,
241 /* lowaddr */ lowaddr,
242 /* highaddr */ BUS_SPACE_MAXADDR,
243 /* filter */ filter,
244 /* filterarg */ filter_arg,
245 /* maxsize */ BUS_SPACE_MAXSIZE_32BIT,
246 /* nsegments */ ~0,
247 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
248 /* flags */ 0,
249 /* lockfunc */ NULL,
250 /* lockarg */ NULL,
251 &bt->parent_dmat) != 0) {
252 bt_isa_release_resources(dev);
253 return (ENOMEM);
254 }
255
256 error = bt_init(dev);
257 if (error) {
258 bt_isa_release_resources(dev);
259 return (ENOMEM);
260 }
261
262 if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
263 /* DMA tag for our sense buffers */
264 if (bus_dma_tag_create(
265 /* parent */ bt->parent_dmat,
266 /* alignment */ 1,
267 /* boundary */ 0,
268 /* lowaddr */ BUS_SPACE_MAXADDR,
269 /* highaddr */ BUS_SPACE_MAXADDR,
270 /* filter */ NULL,
271 /* filterarg */ NULL,
272 /* maxsize */ bt->max_ccbs *
273 sizeof(struct scsi_sense_data),
274 /* nsegments */ 1,
275 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
276 /* flags */ 0,
277 /* lockfunc */ NULL,
278 /* lockarg */ NULL,
279 &bt->sense_dmat) != 0) {
280 bt_isa_release_resources(dev);
281 return (ENOMEM);
282 }
283
284 bt->init_level++;
285
286 /* Allocation of sense buffers */
287 if (bus_dmamem_alloc(bt->sense_dmat,
288 (void **)&bt->sense_buffers,
289 BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
290 bt_isa_release_resources(dev);
291 return (ENOMEM);
292 }
293
294 bt->init_level++;
295
296 /* And permanently map them */
297 bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
298 bt->sense_buffers,
299 bt->max_ccbs * sizeof(*bt->sense_buffers),
300 btmapsensebuffers, bt, /*flags*/0);
301
302 bt->init_level++;
303 }
304
305 error = bt_attach(dev);
306 if (error) {
307 bt_isa_release_resources(dev);
308 return (error);
309 }
310
311 return (0);
312 }
313
314 #define BIOS_MAP_SIZE (16 * 1024)
315
316 static int
btvlbouncefilter(void * arg,bus_addr_t addr)317 btvlbouncefilter(void *arg, bus_addr_t addr)
318 {
319 struct bt_softc *bt;
320
321 bt = (struct bt_softc *)arg;
322
323 addr &= BUS_SPACE_MAXADDR_24BIT;
324
325 if (addr == 0
326 || (addr >= bt->bios_addr
327 && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
328 return (1);
329 return (0);
330 }
331
332 static void
btmapsensebuffers(void * arg,bus_dma_segment_t * segs,int nseg,int error)333 btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
334 {
335 struct bt_softc* bt;
336
337 bt = (struct bt_softc*)arg;
338 bt->sense_buffers_physbase = segs->ds_addr;
339 }
340
341 static device_method_t bt_isa_methods[] = {
342 /* Device interface */
343 DEVMETHOD(device_probe, bt_isa_probe),
344 DEVMETHOD(device_attach, bt_isa_attach),
345
346 { 0, 0 }
347 };
348
349 static driver_t bt_isa_driver = {
350 "bt",
351 bt_isa_methods,
352 sizeof(struct bt_softc),
353 };
354
355 static devclass_t bt_devclass;
356
357 DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);
358 MODULE_DEPEND(bt, isa, 1, 1, 1);
359