The Design and Implementation of the FreeBSD Operating System, Second Edition
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_pci.c

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    1 /*-
    2  * Product specific probe and attach routines for:
    3  *      Buslogic BT946, BT948, BT956, BT958 SCSI controllers
    4  *
    5  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    6  *
    7  * Copyright (c) 1995, 1997, 1998 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 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: releng/12.0/sys/dev/buslogic/bt_pci.c 326255 2017-11-27 14:52:40Z pfg $");
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/kernel.h>
   38 #include <sys/module.h>
   39 #include <sys/lock.h>
   40 #include <sys/mutex.h>
   41 #include <sys/bus.h>
   42 
   43 #include <dev/pci/pcireg.h>
   44 #include <dev/pci/pcivar.h>
   45 
   46 #include <machine/bus.h>
   47 #include <machine/resource.h>
   48 #include <sys/rman.h>
   49 
   50 #include <dev/buslogic/btreg.h>
   51 
   52 #define BT_PCI_IOADDR   PCIR_BAR(0)
   53 #define BT_PCI_MEMADDR  PCIR_BAR(1)
   54 
   55 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER      0x1040104Bul
   56 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC   0x0140104Bul
   57 #define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT       0x8130104Bul
   58 
   59 static int
   60 bt_pci_alloc_resources(device_t dev)
   61 {
   62         int             type = 0, rid, zero;
   63         struct resource *regs = NULL;
   64         struct resource *irq = NULL;
   65 
   66 #if 0
   67         /* XXX Memory Mapped I/O seems to cause problems */
   68         type = SYS_RES_MEMORY;
   69         rid = BT_PCI_MEMADDR;
   70         regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
   71 #else
   72         type = SYS_RES_IOPORT;
   73         rid = BT_PCI_IOADDR;
   74         regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
   75 #endif
   76         if (!regs)
   77                 return (ENOMEM);
   78         
   79         zero = 0;
   80         irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
   81                                      RF_ACTIVE | RF_SHAREABLE);
   82         if (!irq) {
   83                 bus_release_resource(dev, type, rid, regs);
   84                 return (ENOMEM);
   85         }
   86 
   87         bt_init_softc(dev, regs, irq, 0);
   88 
   89         return (0);
   90 }
   91 
   92 static void
   93 bt_pci_release_resources(device_t dev)
   94 {
   95         struct bt_softc *bt = device_get_softc(dev);
   96 
   97         if (bt->port)
   98                 /* XXX can't cope with memory registers anyway */
   99                 bus_release_resource(dev, SYS_RES_IOPORT,
  100                                      BT_PCI_IOADDR, bt->port);
  101         if (bt->irq)
  102                 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
  103         bt_free_softc(dev);
  104 }
  105 
  106 static int
  107 bt_pci_probe(device_t dev)
  108 {
  109         switch (pci_get_devid(dev)) {
  110                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
  111                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
  112                 {
  113                         struct bt_softc   *bt = device_get_softc(dev);
  114                         pci_info_data_t pci_info;
  115                         int error;
  116 
  117                         error = bt_pci_alloc_resources(dev);
  118                         if (error)
  119                                 return (error);
  120 
  121                         /*
  122                          * Determine if an ISA compatible I/O port has been
  123                          * enabled.  If so, record the port so it will not
  124                          * be probed by our ISA probe.  If the PCI I/O port
  125                          * was not set to the compatibility port, disable it.
  126                          */
  127                         error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
  128                                        /*param*/NULL, /*paramlen*/0,
  129                                        (u_int8_t*)&pci_info, sizeof(pci_info),
  130                                        DEFAULT_CMD_TIMEOUT);
  131                         if (error == 0
  132                          && pci_info.io_port < BIO_DISABLED) {
  133                                 bt_mark_probed_bio(pci_info.io_port);
  134                                 if (rman_get_start(bt->port) !=
  135                                     bt_iop_from_bio(pci_info.io_port)) {
  136                                         u_int8_t new_addr;
  137 
  138                                         new_addr = BIO_DISABLED;
  139                                         bt_cmd(bt, BOP_MODIFY_IO_ADDR,
  140                                                /*param*/&new_addr,
  141                                                /*paramlen*/1, /*reply_buf*/NULL,
  142                                                /*reply_len*/0,
  143                                                DEFAULT_CMD_TIMEOUT);
  144                                 }
  145                         }
  146                         bt_pci_release_resources(dev);
  147                         device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter");
  148                         return (BUS_PROBE_DEFAULT);
  149                 }
  150                 default:
  151                         break;
  152         }
  153 
  154         return (ENXIO);
  155 }
  156 
  157 static int
  158 bt_pci_attach(device_t dev)
  159 {
  160         struct bt_softc   *bt = device_get_softc(dev);
  161         int                error;
  162 
  163         /* Initialize softc */
  164         error = bt_pci_alloc_resources(dev);
  165         if (error) {
  166                 device_printf(dev, "can't allocate resources in bt_pci_attach\n");
  167                 return error;
  168         }
  169 
  170         /* Allocate a dmatag for our CCB DMA maps */
  171         if (bus_dma_tag_create( /* PCI parent   */ bus_get_dma_tag(dev),
  172                                 /* alignemnt    */ 1,
  173                                 /* boundary     */ 0,
  174                                 /* lowaddr      */ BUS_SPACE_MAXADDR_32BIT,
  175                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  176                                 /* filter       */ NULL,
  177                                 /* filterarg    */ NULL,
  178                                 /* maxsize      */ BUS_SPACE_MAXSIZE_32BIT,
  179                                 /* nsegments    */ ~0,
  180                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  181                                 /* flags        */ 0,
  182                                 /* lockfunc     */ NULL,
  183                                 /* lockarg      */ NULL,
  184                                 &bt->parent_dmat) != 0) {
  185                 bt_pci_release_resources(dev);
  186                 return (ENOMEM);
  187         }
  188 
  189         if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
  190                 bt_pci_release_resources(dev);
  191                 return (ENXIO);
  192         }
  193 
  194         error = bt_attach(dev);
  195 
  196         if (error) {
  197                 bt_pci_release_resources(dev);
  198                 return (error);
  199         }
  200 
  201         return (0);
  202 }
  203 
  204 static device_method_t bt_pci_methods[] = {
  205         /* Device interface */
  206         DEVMETHOD(device_probe,         bt_pci_probe),
  207         DEVMETHOD(device_attach,        bt_pci_attach),
  208 
  209         { 0, 0 }
  210 };
  211 
  212 static driver_t bt_pci_driver = {
  213         "bt",
  214         bt_pci_methods,
  215         sizeof(struct bt_softc),
  216 };
  217 
  218 static devclass_t bt_devclass;
  219 
  220 DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, 0, 0);
  221 MODULE_DEPEND(bt, pci, 1, 1, 1);

Cache object: d5466c06ef9776a7c9c86c032d69523a


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