mfi_pci.c

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    1 /*-
    2  * Copyright (c) 2006 IronPort Systems
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/6.1/sys/dev/mfi/mfi_pci.c 157460 2006-04-04 03:24:49Z scottl $");
   29 
   30 /* PCI/PCI-X/PCIe bus interface for the LSI MegaSAS controllers */
   31 
   32 #include "opt_mfi.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/module.h>
   38 #include <sys/bus.h>
   39 #include <sys/conf.h>
   40 #include <sys/bio.h>
   41 #include <sys/malloc.h>
   42 
   43 #include <machine/bus.h>
   44 #include <machine/resource.h>
   45 #include <sys/rman.h>
   46 
   47 #include <dev/pci/pcireg.h>
   48 #include <dev/pci/pcivar.h>
   49 
   50 #include <dev/mfi/mfireg.h>
   51 #include <dev/mfi/mfi_ioctl.h>
   52 #include <dev/mfi/mfivar.h>
   53 
   54 static int      mfi_pci_probe(device_t);
   55 static int      mfi_pci_attach(device_t);
   56 static int      mfi_pci_detach(device_t);
   57 static int      mfi_pci_suspend(device_t);
   58 static int      mfi_pci_resume(device_t);
   59 static void     mfi_pci_free(struct mfi_softc *);
   60 
   61 static device_method_t mfi_methods[] = {
   62         DEVMETHOD(device_probe,         mfi_pci_probe),
   63         DEVMETHOD(device_attach,        mfi_pci_attach),
   64         DEVMETHOD(device_detach,        mfi_pci_detach),
   65         DEVMETHOD(device_suspend,       mfi_pci_suspend),
   66         DEVMETHOD(device_resume,        mfi_pci_resume),
   67         DEVMETHOD(bus_print_child,      bus_generic_print_child),
   68         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
   69         { 0, 0 }
   70 };
   71 
   72 static driver_t mfi_pci_driver = {
   73         "mfi",
   74         mfi_methods,
   75         sizeof(struct mfi_softc)
   76 };
   77 
   78 static devclass_t       mfi_devclass;
   79 DRIVER_MODULE(mfi, pci, mfi_pci_driver, mfi_devclass, 0, 0);
   80 
   81 struct mfi_ident {
   82         uint16_t        vendor;
   83         uint16_t        device;
   84         uint16_t        subvendor;
   85         uint16_t        subdevice;
   86         int             flags;
   87         const char      *desc;
   88 } mfi_identifiers[] = {
   89         {0x1000, 0x0411, 0xffff, 0xffff, 0, "LSI MegaSAS 1064R"},
   90         {0x1028, 0x0015, 0xffff, 0xffff, 0, "Dell PERC 5/i"},
   91         {0, 0, 0, 0, 0, NULL}
   92 };
   93 
   94 static struct mfi_ident *
   95 mfi_find_ident(device_t dev)
   96 {
   97         struct mfi_ident *m;
   98 
   99         for (m = mfi_identifiers; m->vendor != 0; m++) {
  100                 if ((m->vendor == pci_get_vendor(dev)) &&
  101                     (m->device == pci_get_device(dev)) &&
  102                     ((m->subvendor == pci_get_subvendor(dev)) ||
  103                     (m->subvendor == 0xffff)) &&
  104                     ((m->subdevice == pci_get_subdevice(dev)) ||
  105                     (m->subdevice == 0xffff)))
  106                         return (m);
  107         }
  108 
  109         return (NULL);
  110 }
  111 
  112 static int
  113 mfi_pci_probe(device_t dev)
  114 {
  115         struct mfi_ident *id;
  116 
  117         if ((id = mfi_find_ident(dev)) != NULL) {
  118                 device_set_desc(dev, id->desc);
  119                 return (BUS_PROBE_DEFAULT);
  120         }
  121         return (ENXIO);
  122 }
  123 
  124 static int
  125 mfi_pci_attach(device_t dev)
  126 {
  127         struct mfi_softc *sc;
  128         struct mfi_ident *m;
  129         uint32_t command;
  130         int error;
  131 
  132         sc = device_get_softc(dev);
  133         bzero(sc, sizeof(*sc));
  134         sc->mfi_dev = dev;
  135 
  136         /* Verify that the adapter can be set up in PCI space */
  137         command = pci_read_config(dev, PCIR_COMMAND, 2);
  138         command |= PCIM_CMD_BUSMASTEREN;
  139         pci_write_config(dev, PCIR_COMMAND, command, 2);
  140         command = pci_read_config(dev, PCIR_COMMAND, 2);
  141         if ((command & PCIM_CMD_BUSMASTEREN) == 0) {
  142                 device_printf(dev, "Can't enable PCI busmaster\n");
  143                 return (ENXIO);
  144         }
  145         if ((command & PCIM_CMD_MEMEN) == 0) {
  146                 device_printf(dev, "PCI memory window not available\n");
  147                 return (ENXIO);
  148         }
  149 
  150         /* Allocate PCI registers */
  151         sc->mfi_regs_rid = PCIR_BAR(0);
  152         if ((sc->mfi_regs_resource = bus_alloc_resource_any(sc->mfi_dev,
  153             SYS_RES_MEMORY, &sc->mfi_regs_rid, RF_ACTIVE)) == NULL) {
  154                 device_printf(dev, "Cannot allocate PCI registers\n");
  155                 return (ENXIO);
  156         }
  157         sc->mfi_btag = rman_get_bustag(sc->mfi_regs_resource);
  158         sc->mfi_bhandle = rman_get_bushandle(sc->mfi_regs_resource);
  159 
  160         error = ENOMEM;
  161 
  162         /* Allocate parent DMA tag */
  163         if (bus_dma_tag_create( NULL,                   /* parent */
  164                                 1, 0,                   /* algnmnt, boundary */
  165                                 BUS_SPACE_MAXADDR,      /* lowaddr */
  166                                 BUS_SPACE_MAXADDR,      /* highaddr */
  167                                 NULL, NULL,             /* filter, filterarg */
  168                                 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
  169                                 BUS_SPACE_UNRESTRICTED, /* nsegments */
  170                                 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
  171                                 0,                      /* flags */
  172                                 NULL, NULL,             /* lockfunc, lockarg */
  173                                 &sc->mfi_parent_dmat)) {
  174                 device_printf(dev, "Cannot allocate parent DMA tag\n");
  175                 goto out;
  176         }
  177 
  178         m = mfi_find_ident(dev);
  179         sc->mfi_flags = m->flags;
  180 
  181         error = mfi_attach(sc);
  182 out:
  183         if (error) {
  184                 mfi_free(sc);
  185                 mfi_pci_free(sc);
  186         }
  187 
  188         return (error);
  189 }
  190 
  191 static int
  192 mfi_pci_detach(device_t dev)
  193 {
  194         struct mfi_softc *sc;
  195         struct mfi_ld *ld;
  196         int error;
  197 
  198         sc = device_get_softc(dev);
  199 
  200         if ((sc->mfi_flags & MFI_FLAGS_OPEN) != 0)
  201                 return (EBUSY);
  202 
  203         while ((ld = TAILQ_FIRST(&sc->mfi_ld_tqh)) != NULL) {
  204                 error = device_delete_child(dev, ld->ld_disk);
  205                 if (error)
  206                         return (error);
  207                 TAILQ_REMOVE(&sc->mfi_ld_tqh, ld, ld_link);
  208                 free(ld, M_MFIBUF);
  209         }
  210 
  211         EVENTHANDLER_DEREGISTER(shutdown_final, sc->mfi_eh);
  212 
  213         mfi_shutdown(sc);
  214         mfi_free(sc);
  215         mfi_pci_free(sc);
  216         return (0);
  217 }
  218 
  219 static void
  220 mfi_pci_free(struct mfi_softc *sc)
  221 {
  222 
  223         if (sc->mfi_regs_resource != NULL) {
  224                 bus_release_resource(sc->mfi_dev, SYS_RES_MEMORY,
  225                     sc->mfi_regs_rid, sc->mfi_regs_resource);
  226         }
  227 
  228         return;
  229 }
  230 
  231 static int
  232 mfi_pci_suspend(device_t dev)
  233 {
  234 
  235         return (EINVAL);
  236 }
  237 
  238 static int
  239 mfi_pci_resume(device_t dev)
  240 {
  241 
  242         return (EINVAL);
  243 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/mfi/mfi_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mfi/mfi_pci.c