sys/dev/aic7xxx/ahd_pci.c

   1 /*-
   2  * FreeBSD, PCI product support functions
   3  *
   4  * Copyright (c) 1995-2001 Justin T. Gibbs
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification, immediately at the beginning of the file.
  13  * 2. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * Alternatively, this software may be distributed under the terms of the
  17  * GNU Public License ("GPL").
  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  * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahd_pci.c#17 $
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include <dev/aic7xxx/aic79xx_osm.h>
  38
  39 static int ahd_pci_probe(device_t dev);
  40 static int ahd_pci_attach(device_t dev);
  41
  42 static device_method_t ahd_pci_device_methods[] = {
  43         /* Device interface */
  44         DEVMETHOD(device_probe,         ahd_pci_probe),
  45         DEVMETHOD(device_attach,        ahd_pci_attach),
  46         DEVMETHOD(device_detach,        ahd_detach),
  47         { 0, 0 }
  48 };
  49
  50 static driver_t ahd_pci_driver = {
  51         "ahd",
  52         ahd_pci_device_methods,
  53         sizeof(struct ahd_softc)
  54 };
  55
  56 static devclass_t ahd_devclass;
  57
  58 DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, 0, 0);
  59 MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
  60 MODULE_VERSION(ahd_pci, 1);
  61
  62 static int
  63 ahd_pci_probe(device_t dev)
  64 {
  65         struct  ahd_pci_identity *entry;
  66
  67         entry = ahd_find_pci_device(dev);
  68         if (entry != NULL) {
  69                 device_set_desc(dev, entry->name);
  70                 return (BUS_PROBE_DEFAULT);
  71         }
  72         return (ENXIO);
  73 }
  74
  75 static int
  76 ahd_pci_attach(device_t dev)
  77 {
  78         struct   ahd_pci_identity *entry;
  79         struct   ahd_softc *ahd;
  80         char    *name;
  81         int      error;
  82
  83         entry = ahd_find_pci_device(dev);
  84         if (entry == NULL)
  85                 return (ENXIO);
  86
  87         /*
  88          * Allocate a softc for this card and
  89          * set it up for attachment by our
  90          * common detect routine.
  91          */
  92         name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
  93         if (name == NULL)
  94                 return (ENOMEM);
  95         strcpy(name, device_get_nameunit(dev));
  96         ahd = ahd_alloc(dev, name);
  97         if (ahd == NULL)
  98                 return (ENOMEM);
  99
 100         ahd_set_unit(ahd, device_get_unit(dev));
 101
 102         /*
 103          * Should we bother disabling 39Bit addressing
 104          * based on installed memory?
 105          */
 106         if (sizeof(bus_addr_t) > 4)
 107                 ahd->flags |= AHD_39BIT_ADDRESSING;
 108
 109         /* Allocate a dmatag for our SCB DMA maps */
 110         error = aic_dma_tag_create(ahd, /*parent*/bus_get_dma_tag(dev),
 111                                    /*alignment*/1, /*boundary*/0,
 112                                    (ahd->flags & AHD_39BIT_ADDRESSING)
 113                                    ? 0x7FFFFFFFFF
 114                                    : BUS_SPACE_MAXADDR_32BIT,
 115                                    /*highaddr*/BUS_SPACE_MAXADDR,
 116                                    /*filter*/NULL, /*filterarg*/NULL,
 117                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 118                                    /*nsegments*/AHD_NSEG,
 119                                    /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
 120                                    /*flags*/0,
 121                                    &ahd->parent_dmat);
 122
 123         if (error != 0) {
 124                 printf("ahd_pci_attach: Could not allocate DMA tag "
 125                        "- error %d\n", error);
 126                 ahd_free(ahd);
 127                 return (ENOMEM);
 128         }
 129         ahd->dev_softc = dev;
 130         error = ahd_pci_config(ahd, entry);
 131         if (error != 0) {
 132                 ahd_free(ahd);
 133                 return (error);
 134         }
 135
 136         ahd_sysctl(ahd);
 137         ahd_attach(ahd);
 138         return (0);
 139 }
 140
 141 int
 142 ahd_pci_map_registers(struct ahd_softc *ahd)
 143 {
 144         struct  resource *regs;
 145         struct  resource *regs2;
 146         u_int   command;
 147         int     regs_type;
 148         int     regs_id;
 149         int     regs_id2;
 150         int     allow_memio;
 151
 152         command = aic_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
 153         regs = NULL;
 154         regs2 = NULL;
 155         regs_type = 0;
 156         regs_id = 0;
 157
 158         /* Retrieve the per-device 'allow_memio' hint */
 159         if (resource_int_value(device_get_name(ahd->dev_softc),
 160                                device_get_unit(ahd->dev_softc),
 161                                "allow_memio", &allow_memio) != 0) {
 162                 if (bootverbose)
 163                         device_printf(ahd->dev_softc,
 164                                       "Defaulting to MEMIO on\n");
 165                 allow_memio = 1;
 166         }
 167
 168         if ((command & PCIM_CMD_MEMEN) != 0
 169          && (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
 170          && allow_memio != 0) {
 171
 172                 regs_type = SYS_RES_MEMORY;
 173                 regs_id = AHD_PCI_MEMADDR;
 174                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
 175                                               &regs_id, RF_ACTIVE);
 176                 if (regs != NULL) {
 177                         int error;
 178
 179                         ahd->tags[0] = rman_get_bustag(regs);
 180                         ahd->bshs[0] = rman_get_bushandle(regs);
 181                         ahd->tags[1] = ahd->tags[0];
 182                         error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
 183                                                     /*offset*/0x100,
 184                                                     /*size*/0x100,
 185                                                     &ahd->bshs[1]);
 186                         /*
 187                          * Do a quick test to see if memory mapped
 188                          * I/O is functioning correctly.
 189                          */
 190                         if (error != 0
 191                          || ahd_pci_test_register_access(ahd) != 0) {
 192                                 device_printf(ahd->dev_softc,
 193                                        "PCI Device %d:%d:%d failed memory "
 194                                        "mapped test.  Using PIO.\n",
 195                                        aic_get_pci_bus(ahd->dev_softc),
 196                                        aic_get_pci_slot(ahd->dev_softc),
 197                                        aic_get_pci_function(ahd->dev_softc));
 198                                 bus_release_resource(ahd->dev_softc, regs_type,
 199                                                      regs_id, regs);
 200                                 regs = NULL;
 201                                 AHD_CORRECTABLE_ERROR(ahd);
 202                         } else {
 203                                 command &= ~PCIM_CMD_PORTEN;
 204                                 aic_pci_write_config(ahd->dev_softc,
 205                                                      PCIR_COMMAND,
 206                                                      command, /*bytes*/1);
 207                         }
 208                 }
 209         }
 210         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
 211                 regs_type = SYS_RES_IOPORT;
 212                 regs_id = AHD_PCI_IOADDR0;
 213                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
 214                                               &regs_id, RF_ACTIVE);
 215                 if (regs == NULL) {
 216                         device_printf(ahd->dev_softc,
 217                                       "can't allocate register resources\n");
 218                         AHD_UNCORRECTABLE_ERROR(ahd);
 219                         return (ENOMEM);
 220                 }
 221                 ahd->tags[0] = rman_get_bustag(regs);
 222                 ahd->bshs[0] = rman_get_bushandle(regs);
 223
 224                 /* And now the second BAR */
 225                 regs_id2 = AHD_PCI_IOADDR1;
 226                 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
 227                                                &regs_id2, RF_ACTIVE);
 228                 if (regs2 == NULL) {
 229                         device_printf(ahd->dev_softc,
 230                                       "can't allocate register resources\n");
 231                         AHD_UNCORRECTABLE_ERROR(ahd);
 232                         return (ENOMEM);
 233                 }
 234                 ahd->tags[1] = rman_get_bustag(regs2);
 235                 ahd->bshs[1] = rman_get_bushandle(regs2);
 236                 command &= ~PCIM_CMD_MEMEN;
 237                 aic_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 238                                      command, /*bytes*/1);
 239                 ahd->platform_data->regs_res_type[1] = regs_type;
 240                 ahd->platform_data->regs_res_id[1] = regs_id2;
 241                 ahd->platform_data->regs[1] = regs2;
 242         }
 243         ahd->platform_data->regs_res_type[0] = regs_type;
 244         ahd->platform_data->regs_res_id[0] = regs_id;
 245         ahd->platform_data->regs[0] = regs;
 246         return (0);
 247 }
 248
 249 int
 250 ahd_pci_map_int(struct ahd_softc *ahd)
 251 {
 252         int zero;
 253
 254         zero = 0;
 255         ahd->platform_data->irq =
 256             bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
 257                                    RF_ACTIVE | RF_SHAREABLE);
 258         if (ahd->platform_data->irq == NULL)
 259                 return (ENOMEM);
 260         ahd->platform_data->irq_res_type = SYS_RES_IRQ;
 261         return (ahd_map_int(ahd));
 262 }