Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/buslogic/bt_isa.c
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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 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD: releng/5.3/sys/dev/buslogic/bt_isa.c 127135 2004-03-17 17:50:55Z njl $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/bus.h> 41 42 #include <machine/bus_pio.h> 43 #include <machine/bus.h> 44 #include <machine/resource.h> 45 #include <sys/rman.h> 46 47 #include <isa/isavar.h> 48 #include <dev/buslogic/btreg.h> 49 50 #include <cam/scsi/scsi_all.h> 51 52 static bus_dma_filter_t btvlbouncefilter; 53 static bus_dmamap_callback_t btmapsensebuffers; 54 55 static int 56 bt_isa_alloc_resources(device_t dev, u_long portstart, u_long portend) 57 { 58 int rid; 59 struct resource *port; 60 struct resource *irq; 61 struct resource *drq; 62 63 rid = 0; 64 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 65 portstart, portend, BT_NREGS, RF_ACTIVE); 66 if (!port) 67 return (ENOMEM); 68 69 if (isa_get_irq(dev) != -1) { 70 rid = 0; 71 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 72 if (!irq) { 73 if (port) 74 bus_release_resource(dev, SYS_RES_IOPORT, 75 0, port); 76 return (ENOMEM); 77 } 78 } else 79 irq = 0; 80 81 if (isa_get_drq(dev) != -1) { 82 rid = 0; 83 drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, &rid, RF_ACTIVE); 84 if (!drq) { 85 if (port) 86 bus_release_resource(dev, SYS_RES_IOPORT, 87 0, port); 88 if (irq) 89 bus_release_resource(dev, SYS_RES_IRQ, 90 0, irq); 91 return (ENOMEM); 92 } 93 } else 94 drq = 0; 95 96 bt_init_softc(dev, port, irq, drq); 97 98 return (0); 99 } 100 101 static void 102 bt_isa_release_resources(device_t dev) 103 { 104 struct bt_softc *bt = device_get_softc(dev); 105 106 if (bt->port) 107 bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port); 108 if (bt->irq) 109 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq); 110 if (bt->drq) 111 bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq); 112 bt_free_softc(dev); 113 } 114 115 /* 116 * Check if the device can be found at the port given 117 * and if so, set it up ready for further work 118 * as an argument, takes the isa_device structure from 119 * autoconf.c 120 */ 121 static int 122 bt_isa_probe(device_t dev) 123 { 124 /* 125 * find unit and check we have that many defined 126 */ 127 int port_index; 128 int max_port_index; 129 130 /* No pnp support */ 131 if (isa_get_vendorid(dev)) 132 return (ENXIO); 133 134 port_index = 0; 135 max_port_index = BT_NUM_ISAPORTS - 1; 136 /* 137 * Bound our board search if the user has 138 * specified an exact port. 139 */ 140 bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index); 141 142 if (port_index < 0) 143 return (ENXIO); 144 145 /* Attempt to find an adapter */ 146 for (;port_index <= max_port_index; port_index++) { 147 struct bt_probe_info info; 148 u_int ioport; 149 150 ioport = bt_iop_from_bio(port_index); 151 152 /* 153 * Ensure this port has not already been claimed already 154 * by a PCI, EISA or ISA adapter. 155 */ 156 if (bt_check_probed_iop(ioport) != 0) 157 continue; 158 159 /* Initialise the softc for use during probing */ 160 if (bt_isa_alloc_resources(dev, ioport, 161 ioport + BT_NREGS -1) != 0) 162 continue; 163 164 /* We're going to attempt to probe it now, so mark it probed */ 165 bt_mark_probed_bio(port_index); 166 167 if (bt_port_probe(dev, &info) != 0) { 168 if (bootverbose) 169 printf("bt_isa_probe: Probe failed at 0x%x\n", 170 ioport); 171 bt_isa_release_resources(dev); 172 continue; 173 } 174 175 bt_isa_release_resources(dev); 176 177 bus_set_resource(dev, SYS_RES_DRQ, 0, info.drq, 1); 178 bus_set_resource(dev, SYS_RES_IRQ, 0, info.irq, 1); 179 180 return (0); 181 } 182 183 return (ENXIO); 184 } 185 186 /* 187 * Attach all the sub-devices we can find 188 */ 189 static int 190 bt_isa_attach(device_t dev) 191 { 192 struct bt_softc *bt = device_get_softc(dev); 193 bus_dma_filter_t *filter; 194 void *filter_arg; 195 bus_addr_t lowaddr; 196 int error, drq; 197 198 /* Initialise softc */ 199 error = bt_isa_alloc_resources(dev, 0, ~0); 200 if (error) { 201 device_printf(dev, "can't allocate resources in bt_isa_attach\n"); 202 return error; 203 } 204 205 /* Program the DMA channel for external control */ 206 if ((drq = isa_get_drq(dev)) != -1) 207 isa_dmacascade(drq); 208 209 /* Allocate our parent dmatag */ 210 filter = NULL; 211 filter_arg = NULL; 212 lowaddr = BUS_SPACE_MAXADDR_24BIT; 213 if (bt->model[0] == '4') { 214 /* 215 * This is a VL adapter. Typically, VL devices have access 216 * to the full 32bit address space. On BT-445S adapters 217 * prior to revision E, there is a hardware bug that causes 218 * corruption of transfers to/from addresses in the range of 219 * the BIOS modulo 16MB. The only properly functioning 220 * BT-445S Host Adapters have firmware version 3.37. 221 * If we encounter one of these adapters and the BIOS is 222 * installed, install a filter function for our bus_dma_map 223 * that will catch these accesses and bounce them to a safe 224 * region of memory. 225 */ 226 if (bt->bios_addr != 0 227 && strcmp(bt->model, "445S") == 0 228 && strcmp(bt->firmware_ver, "3.37") < 0) { 229 filter = btvlbouncefilter; 230 filter_arg = bt; 231 } else { 232 lowaddr = BUS_SPACE_MAXADDR_32BIT; 233 } 234 } 235 236 /* XXX Should be a child of the ISA or VL bus dma tag */ 237 if (bus_dma_tag_create( /* parent */ NULL, 238 /* alignemnt */ 1, 239 /* boundary */ 0, 240 /* lowaddr */ lowaddr, 241 /* highaddr */ BUS_SPACE_MAXADDR, 242 /* filter */ filter, 243 /* filterarg */ filter_arg, 244 /* maxsize */ BUS_SPACE_MAXSIZE_32BIT, 245 /* nsegments */ ~0, 246 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT, 247 /* flags */ 0, 248 /* lockfunc */ busdma_lock_mutex, 249 /* lockarg */ &Giant, 250 &bt->parent_dmat) != 0) { 251 bt_isa_release_resources(dev); 252 return (ENOMEM); 253 } 254 255 error = bt_init(dev); 256 if (error) { 257 bt_isa_release_resources(dev); 258 return (ENOMEM); 259 } 260 261 if (lowaddr != BUS_SPACE_MAXADDR_32BIT) { 262 /* DMA tag for our sense buffers */ 263 if (bus_dma_tag_create( 264 /* parent */ bt->parent_dmat, 265 /* alignment */ 1, 266 /* boundary */ 0, 267 /* lowaddr */ BUS_SPACE_MAXADDR, 268 /* highaddr */ BUS_SPACE_MAXADDR, 269 /* filter */ NULL, 270 /* filterarg */ NULL, 271 /* maxsize */ bt->max_ccbs * 272 sizeof(struct scsi_sense_data), 273 /* nsegments */ 1, 274 /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT, 275 /* flags */ 0, 276 /* lockfunc */ busdma_lock_mutex, 277 /* lockarg */ &Giant, 278 &bt->sense_dmat) != 0) { 279 bt_isa_release_resources(dev); 280 return (ENOMEM); 281 } 282 283 bt->init_level++; 284 285 /* Allocation of sense buffers */ 286 if (bus_dmamem_alloc(bt->sense_dmat, 287 (void **)&bt->sense_buffers, 288 BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) { 289 bt_isa_release_resources(dev); 290 return (ENOMEM); 291 } 292 293 bt->init_level++; 294 295 /* And permanently map them */ 296 bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap, 297 bt->sense_buffers, 298 bt->max_ccbs * sizeof(*bt->sense_buffers), 299 btmapsensebuffers, bt, /*flags*/0); 300 301 bt->init_level++; 302 } 303 304 error = bt_attach(dev); 305 if (error) { 306 bt_isa_release_resources(dev); 307 return (error); 308 } 309 310 return (0); 311 } 312 313 #define BIOS_MAP_SIZE (16 * 1024) 314 315 static int 316 btvlbouncefilter(void *arg, bus_addr_t addr) 317 { 318 struct bt_softc *bt; 319 320 bt = (struct bt_softc *)arg; 321 322 addr &= BUS_SPACE_MAXADDR_24BIT; 323 324 if (addr == 0 325 || (addr >= bt->bios_addr 326 && addr < (bt->bios_addr + BIOS_MAP_SIZE))) 327 return (1); 328 return (0); 329 } 330 331 static void 332 btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error) 333 { 334 struct bt_softc* bt; 335 336 bt = (struct bt_softc*)arg; 337 bt->sense_buffers_physbase = segs->ds_addr; 338 } 339 340 static device_method_t bt_isa_methods[] = { 341 /* Device interface */ 342 DEVMETHOD(device_probe, bt_isa_probe), 343 DEVMETHOD(device_attach, bt_isa_attach), 344 345 { 0, 0 } 346 }; 347 348 static driver_t bt_isa_driver = { 349 "bt", 350 bt_isa_methods, 351 sizeof(struct bt_softc), 352 }; 353 354 static devclass_t bt_devclass; 355 356 DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);
Cache object: fe0c1b41295374fb3fc80db150130c06
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