sys/dev/disk/buslogic/bt_isa.c

   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 $
  30  * $DragonFly: src/sys/dev/disk/buslogic/bt_isa.c,v 1.5 2006/12/22 23:26:16 swildner Exp $
  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>
  38 #include <sys/rman.h>
  39
  40 #include <bus/isa/isavar.h>
  41 #include "btreg.h"
  42
  43 #include <bus/cam/scsi/scsi_all.h>
  44
  45 static  bus_dma_filter_t btvlbouncefilter;
  46 static  bus_dmamap_callback_t btmapsensebuffers;
  47
  48 static int
  49 bt_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
  96 static void
  97 bt_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  */
 116 static int
 117 bt_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                                 kprintf("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  */
 184 static int
 185 bt_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
 297 static int
 298 btvlbouncefilter(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
 313 static void
 314 btmapsensebuffers(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
 322 static 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
 330 static driver_t bt_isa_driver = {
 331         "bt",
 332         bt_isa_methods,
 333         sizeof(struct bt_softc),
 334 };
 335
 336 static devclass_t bt_devclass;
 337
 338 DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);