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  * Copyright (c) 1995, 1997, 1998 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 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: stable/11/sys/dev/buslogic/bt_pci.c 331722 2018-03-29 02:50:57Z eadler $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/kernel.h>
   36 #include <sys/module.h>
   37 #include <sys/lock.h>
   38 #include <sys/mutex.h>
   39 #include <sys/bus.h>
   40 
   41 #include <dev/pci/pcireg.h>
   42 #include <dev/pci/pcivar.h>
   43 
   44 #include <machine/bus.h>
   45 #include <machine/resource.h>
   46 #include <sys/rman.h>
   47 
   48 #include <dev/buslogic/btreg.h>
   49 
   50 #define BT_PCI_IOADDR   PCIR_BAR(0)
   51 #define BT_PCI_MEMADDR  PCIR_BAR(1)
   52 
   53 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER      0x1040104Bul
   54 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC   0x0140104Bul
   55 #define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT       0x8130104Bul
   56 
   57 static int
   58 bt_pci_alloc_resources(device_t dev)
   59 {
   60         int             type = 0, rid, zero;
   61         struct resource *regs = NULL;
   62         struct resource *irq = NULL;
   63 
   64 #if 0
   65         /* XXX Memory Mapped I/O seems to cause problems */
   66         type = SYS_RES_MEMORY;
   67         rid = BT_PCI_MEMADDR;
   68         regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
   69 #else
   70         type = SYS_RES_IOPORT;
   71         rid = BT_PCI_IOADDR;
   72         regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
   73 #endif
   74         if (!regs)
   75                 return (ENOMEM);
   76         
   77         zero = 0;
   78         irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
   79                                      RF_ACTIVE | RF_SHAREABLE);
   80         if (!irq) {
   81                 bus_release_resource(dev, type, rid, regs);
   82                 return (ENOMEM);
   83         }
   84 
   85         bt_init_softc(dev, regs, irq, 0);
   86 
   87         return (0);
   88 }
   89 
   90 static void
   91 bt_pci_release_resources(device_t dev)
   92 {
   93         struct bt_softc *bt = device_get_softc(dev);
   94 
   95         if (bt->port)
   96                 /* XXX can't cope with memory registers anyway */
   97                 bus_release_resource(dev, SYS_RES_IOPORT,
   98                                      BT_PCI_IOADDR, bt->port);
   99         if (bt->irq)
  100                 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
  101         bt_free_softc(dev);
  102 }
  103 
  104 static int
  105 bt_pci_probe(device_t dev)
  106 {
  107         switch (pci_get_devid(dev)) {
  108                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
  109                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
  110                 {
  111                         struct bt_softc   *bt = device_get_softc(dev);
  112                         pci_info_data_t pci_info;
  113                         int error;
  114 
  115                         error = bt_pci_alloc_resources(dev);
  116                         if (error)
  117                                 return (error);
  118 
  119                         /*
  120                          * Determine if an ISA compatible I/O port has been
  121                          * enabled.  If so, record the port so it will not
  122                          * be probed by our ISA probe.  If the PCI I/O port
  123                          * was not set to the compatibility port, disable it.
  124                          */
  125                         error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
  126                                        /*param*/NULL, /*paramlen*/0,
  127                                        (u_int8_t*)&pci_info, sizeof(pci_info),
  128                                        DEFAULT_CMD_TIMEOUT);
  129                         if (error == 0
  130                          && pci_info.io_port < BIO_DISABLED) {
  131                                 bt_mark_probed_bio(pci_info.io_port);
  132                                 if (rman_get_start(bt->port) !=
  133                                     bt_iop_from_bio(pci_info.io_port)) {
  134                                         u_int8_t new_addr;
  135 
  136                                         new_addr = BIO_DISABLED;
  137                                         bt_cmd(bt, BOP_MODIFY_IO_ADDR,
  138                                                /*param*/&new_addr,
  139                                                /*paramlen*/1, /*reply_buf*/NULL,
  140                                                /*reply_len*/0,
  141                                                DEFAULT_CMD_TIMEOUT);
  142                                 }
  143                         }
  144                         bt_pci_release_resources(dev);
  145                         device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter");
  146                         return (BUS_PROBE_DEFAULT);
  147                 }
  148                 default:
  149                         break;
  150         }
  151 
  152         return (ENXIO);
  153 }
  154 
  155 static int
  156 bt_pci_attach(device_t dev)
  157 {
  158         struct bt_softc   *bt = device_get_softc(dev);
  159         int                error;
  160 
  161         /* Initialize softc */
  162         error = bt_pci_alloc_resources(dev);
  163         if (error) {
  164                 device_printf(dev, "can't allocate resources in bt_pci_attach\n");
  165                 return error;
  166         }
  167 
  168         /* Allocate a dmatag for our CCB DMA maps */
  169         if (bus_dma_tag_create( /* PCI parent   */ bus_get_dma_tag(dev),
  170                                 /* alignemnt    */ 1,
  171                                 /* boundary     */ 0,
  172                                 /* lowaddr      */ BUS_SPACE_MAXADDR_32BIT,
  173                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  174                                 /* filter       */ NULL,
  175                                 /* filterarg    */ NULL,
  176                                 /* maxsize      */ BUS_SPACE_MAXSIZE_32BIT,
  177                                 /* nsegments    */ ~0,
  178                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  179                                 /* flags        */ 0,
  180                                 /* lockfunc     */ NULL,
  181                                 /* lockarg      */ NULL,
  182                                 &bt->parent_dmat) != 0) {
  183                 bt_pci_release_resources(dev);
  184                 return (ENOMEM);
  185         }
  186 
  187         if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
  188                 bt_pci_release_resources(dev);
  189                 return (ENXIO);
  190         }
  191 
  192         error = bt_attach(dev);
  193 
  194         if (error) {
  195                 bt_pci_release_resources(dev);
  196                 return (error);
  197         }
  198 
  199         return (0);
  200 }
  201 
  202 static device_method_t bt_pci_methods[] = {
  203         /* Device interface */
  204         DEVMETHOD(device_probe,         bt_pci_probe),
  205         DEVMETHOD(device_attach,        bt_pci_attach),
  206 
  207         { 0, 0 }
  208 };
  209 
  210 static driver_t bt_pci_driver = {
  211         "bt",
  212         bt_pci_methods,
  213         sizeof(struct bt_softc),
  214 };
  215 
  216 static devclass_t bt_devclass;
  217 
  218 DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, 0, 0);
  219 MODULE_DEPEND(bt, pci, 1, 1, 1);

Cache object: 6a85c266a0bef02c31eb741b8405f706


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