ahd_pci.c

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    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 DRIVER_MODULE(ahd, pci, ahd_pci_driver, 0, 0);
   57 MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
   58 MODULE_VERSION(ahd_pci, 1);
   59 
   60 static int
   61 ahd_pci_probe(device_t dev)
   62 {
   63         struct  ahd_pci_identity *entry;
   64 
   65         entry = ahd_find_pci_device(dev);
   66         if (entry != NULL) {
   67                 device_set_desc(dev, entry->name);
   68                 return (BUS_PROBE_DEFAULT);
   69         }
   70         return (ENXIO);
   71 }
   72 
   73 static int
   74 ahd_pci_attach(device_t dev)
   75 {
   76         struct   ahd_pci_identity *entry;
   77         struct   ahd_softc *ahd;
   78         char    *name;
   79         int      error;
   80 
   81         entry = ahd_find_pci_device(dev);
   82         if (entry == NULL)
   83                 return (ENXIO);
   84 
   85         /*
   86          * Allocate a softc for this card and
   87          * set it up for attachment by our
   88          * common detect routine.
   89          */
   90         name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
   91         if (name == NULL)
   92                 return (ENOMEM);
   93         strcpy(name, device_get_nameunit(dev));
   94         ahd = ahd_alloc(dev, name);
   95         if (ahd == NULL)
   96                 return (ENOMEM);
   97 
   98         ahd_set_unit(ahd, device_get_unit(dev));
   99 
  100         /*
  101          * Should we bother disabling 39Bit addressing
  102          * based on installed memory?
  103          */
  104         if (sizeof(bus_addr_t) > 4)
  105                 ahd->flags |= AHD_39BIT_ADDRESSING;
  106 
  107         /* Allocate a dmatag for our SCB DMA maps */
  108         error = aic_dma_tag_create(ahd, /*parent*/bus_get_dma_tag(dev),
  109                                    /*alignment*/1, /*boundary*/0,
  110                                    (ahd->flags & AHD_39BIT_ADDRESSING)
  111                                    ? 0x7FFFFFFFFF
  112                                    : BUS_SPACE_MAXADDR_32BIT,
  113                                    /*highaddr*/BUS_SPACE_MAXADDR,
  114                                    /*filter*/NULL, /*filterarg*/NULL,
  115                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
  116                                    /*nsegments*/AHD_NSEG,
  117                                    /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
  118                                    /*flags*/0,
  119                                    &ahd->parent_dmat);
  120 
  121         if (error != 0) {
  122                 printf("ahd_pci_attach: Could not allocate DMA tag "
  123                        "- error %d\n", error);
  124                 ahd_free(ahd);
  125                 return (ENOMEM);
  126         }
  127         ahd->dev_softc = dev;
  128         error = ahd_pci_config(ahd, entry);
  129         if (error != 0) {
  130                 ahd_free(ahd);
  131                 return (error);
  132         }
  133 
  134         ahd_sysctl(ahd);
  135         ahd_attach(ahd);
  136         return (0);
  137 }
  138 
  139 int
  140 ahd_pci_map_registers(struct ahd_softc *ahd)
  141 {
  142         struct  resource *regs;
  143         struct  resource *regs2;
  144         int     regs_type;
  145         int     regs_id;
  146         int     regs_id2;
  147         int     allow_memio;
  148 
  149         regs = NULL;
  150         regs2 = NULL;
  151         regs_type = 0;
  152         regs_id = 0;
  153 
  154         /* Retrieve the per-device 'allow_memio' hint */
  155         if (resource_int_value(device_get_name(ahd->dev_softc),
  156                                device_get_unit(ahd->dev_softc),
  157                                "allow_memio", &allow_memio) != 0) {
  158                 if (bootverbose)
  159                         device_printf(ahd->dev_softc,
  160                                       "Defaulting to MEMIO on\n");
  161                 allow_memio = 1;
  162         }
  163 
  164         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
  165          && allow_memio != 0) {
  166                 regs_type = SYS_RES_MEMORY;
  167                 regs_id = AHD_PCI_MEMADDR;
  168                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
  169                                               &regs_id, RF_ACTIVE);
  170                 if (regs != NULL) {
  171                         int error;
  172 
  173                         ahd->tags[0] = rman_get_bustag(regs);
  174                         ahd->bshs[0] = rman_get_bushandle(regs);
  175                         ahd->tags[1] = ahd->tags[0];
  176                         error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
  177                                                     /*offset*/0x100,
  178                                                     /*size*/0x100,
  179                                                     &ahd->bshs[1]);
  180                         /*
  181                          * Do a quick test to see if memory mapped
  182                          * I/O is functioning correctly.
  183                          */
  184                         if (error != 0
  185                          || ahd_pci_test_register_access(ahd) != 0) {
  186                                 device_printf(ahd->dev_softc,
  187                                        "PCI Device %d:%d:%d failed memory "
  188                                        "mapped test.  Using PIO.\n",
  189                                        aic_get_pci_bus(ahd->dev_softc),
  190                                        aic_get_pci_slot(ahd->dev_softc),
  191                                        aic_get_pci_function(ahd->dev_softc));
  192                                 bus_release_resource(ahd->dev_softc, regs_type,
  193                                                      regs_id, regs);
  194                                 regs = NULL;
  195                                 AHD_CORRECTABLE_ERROR(ahd);
  196                         }
  197                 }
  198         }
  199         if (regs == NULL) {
  200                 regs_type = SYS_RES_IOPORT;
  201                 regs_id = AHD_PCI_IOADDR0;
  202                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
  203                                               &regs_id, RF_ACTIVE);
  204                 if (regs == NULL) {
  205                         device_printf(ahd->dev_softc,
  206                                       "can't allocate register resources\n");
  207                         AHD_UNCORRECTABLE_ERROR(ahd);
  208                         return (ENOMEM);
  209                 }
  210                 ahd->tags[0] = rman_get_bustag(regs);
  211                 ahd->bshs[0] = rman_get_bushandle(regs);
  212 
  213                 /* And now the second BAR */
  214                 regs_id2 = AHD_PCI_IOADDR1;
  215                 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
  216                                                &regs_id2, RF_ACTIVE);
  217                 if (regs2 == NULL) {
  218                         device_printf(ahd->dev_softc,
  219                                       "can't allocate register resources\n");
  220                         AHD_UNCORRECTABLE_ERROR(ahd);
  221                         return (ENOMEM);
  222                 }
  223                 ahd->tags[1] = rman_get_bustag(regs2);
  224                 ahd->bshs[1] = rman_get_bushandle(regs2);
  225                 ahd->platform_data->regs_res_type[1] = regs_type;
  226                 ahd->platform_data->regs_res_id[1] = regs_id2;
  227                 ahd->platform_data->regs[1] = regs2;
  228         }
  229         ahd->platform_data->regs_res_type[0] = regs_type;
  230         ahd->platform_data->regs_res_id[0] = regs_id;
  231         ahd->platform_data->regs[0] = regs;
  232         return (0);
  233 }
  234 
  235 int
  236 ahd_pci_map_int(struct ahd_softc *ahd)
  237 {
  238         int zero;
  239 
  240         zero = 0;
  241         ahd->platform_data->irq =
  242             bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
  243                                    RF_ACTIVE | RF_SHAREABLE);
  244         if (ahd->platform_data->irq == NULL)
  245                 return (ENOMEM);
  246         ahd->platform_data->irq_res_type = SYS_RES_IRQ;
  247         return (ahd_map_int(ahd));
  248 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/aic7xxx/ahd_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/aic7xxx/ahd_pci.c