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/mfi/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  * Copyright (c) 2007 LSI Corp.
   28  * Copyright (c) 2007 Rajesh Prabhakaran.
   29  * All rights reserved.
   30  *
   31  * Redistribution and use in source and binary forms, with or without
   32  * modification, are permitted provided that the following conditions
   33  * are met:
   34  * 1. Redistributions of source code must retain the above copyright
   35  *    notice, this list of conditions and the following disclaimer.
   36  * 2. Redistributions in binary form must reproduce the above copyright
   37  *    notice, this list of conditions and the following disclaimer in the
   38  *    documentation and/or other materials provided with the distribution.
   39  *
   40  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   50  * SUCH DAMAGE.
   51  */
   52 
   53 #include <sys/cdefs.h>
   54 __FBSDID("$FreeBSD$");
   55 
   56 /* PCI/PCI-X/PCIe bus interface for the LSI MegaSAS controllers */
   57 
   58 #include "opt_mfi.h"
   59 
   60 #include <sys/param.h>
   61 #include <sys/systm.h>
   62 #include <sys/kernel.h>
   63 #include <sys/selinfo.h>
   64 #include <sys/module.h>
   65 #include <sys/bus.h>
   66 #include <sys/conf.h>
   67 #include <sys/bio.h>
   68 #include <sys/malloc.h>
   69 #include <sys/uio.h>
   70 
   71 #include <machine/bus.h>
   72 #include <machine/resource.h>
   73 #include <sys/rman.h>
   74 
   75 #include <dev/pci/pcireg.h>
   76 #include <dev/pci/pcivar.h>
   77 
   78 #include <dev/mfi/mfireg.h>
   79 #include <dev/mfi/mfi_ioctl.h>
   80 #include <dev/mfi/mfivar.h>
   81 
   82 static int      mfi_pci_probe(device_t);
   83 static int      mfi_pci_attach(device_t);
   84 static int      mfi_pci_detach(device_t);
   85 static int      mfi_pci_suspend(device_t);
   86 static int      mfi_pci_resume(device_t);
   87 static void     mfi_pci_free(struct mfi_softc *);
   88 
   89 static device_method_t mfi_methods[] = {
   90         DEVMETHOD(device_probe,         mfi_pci_probe),
   91         DEVMETHOD(device_attach,        mfi_pci_attach),
   92         DEVMETHOD(device_detach,        mfi_pci_detach),
   93         DEVMETHOD(device_suspend,       mfi_pci_suspend),
   94         DEVMETHOD(device_resume,        mfi_pci_resume),
   95         DEVMETHOD(bus_print_child,      bus_generic_print_child),
   96         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
   97         { 0, 0 }
   98 };
   99 
  100 static driver_t mfi_pci_driver = {
  101         "mfi",
  102         mfi_methods,
  103         sizeof(struct mfi_softc)
  104 };
  105 
  106 static devclass_t       mfi_devclass;
  107 DRIVER_MODULE(mfi, pci, mfi_pci_driver, mfi_devclass, 0, 0);
  108 
  109 struct mfi_ident {
  110         uint16_t        vendor;
  111         uint16_t        device;
  112         uint16_t        subvendor;
  113         uint16_t        subdevice;
  114         int             flags;
  115         const char      *desc;
  116 } mfi_identifiers[] = {
  117         {0x1000, 0x0411, 0xffff, 0xffff, MFI_FLAGS_1064R, "LSI MegaSAS 1064R"}, /* Brocton IOP */
  118         {0x1000, 0x0413, 0xffff, 0xffff, MFI_FLAGS_1064R, "LSI MegaSAS 1064R"}, /* Verde ZCR */
  119         {0x1028, 0x0015, 0xffff, 0xffff, MFI_FLAGS_1064R, "Dell PERC 5/i"},
  120         {0x1000, 0x0060, 0xffff, 0xffff, MFI_FLAGS_1078,  "LSI MegaSAS 1078"},
  121         {0, 0, 0, 0, 0, NULL}
  122 };
  123 
  124 static struct mfi_ident *
  125 mfi_find_ident(device_t dev)
  126 {
  127         struct mfi_ident *m;
  128 
  129         for (m = mfi_identifiers; m->vendor != 0; m++) {
  130                 if ((m->vendor == pci_get_vendor(dev)) &&
  131                     (m->device == pci_get_device(dev)) &&
  132                     ((m->subvendor == pci_get_subvendor(dev)) ||
  133                     (m->subvendor == 0xffff)) &&
  134                     ((m->subdevice == pci_get_subdevice(dev)) ||
  135                     (m->subdevice == 0xffff)))
  136                         return (m);
  137         }
  138 
  139         return (NULL);
  140 }
  141 
  142 static int
  143 mfi_pci_probe(device_t dev)
  144 {
  145         struct mfi_ident *id;
  146 
  147         if ((id = mfi_find_ident(dev)) != NULL) {
  148                 device_set_desc(dev, id->desc);
  149                 return (BUS_PROBE_DEFAULT);
  150         }
  151         return (ENXIO);
  152 }
  153 
  154 static int
  155 mfi_pci_attach(device_t dev)
  156 {
  157         struct mfi_softc *sc;
  158         struct mfi_ident *m;
  159         uint32_t command;
  160         int error;
  161 
  162         sc = device_get_softc(dev);
  163         bzero(sc, sizeof(*sc));
  164         sc->mfi_dev = dev;
  165 
  166         /* Verify that the adapter can be set up in PCI space */
  167         command = pci_read_config(dev, PCIR_COMMAND, 2);
  168         command |= PCIM_CMD_BUSMASTEREN;
  169         pci_write_config(dev, PCIR_COMMAND, command, 2);
  170         command = pci_read_config(dev, PCIR_COMMAND, 2);
  171         if ((command & PCIM_CMD_BUSMASTEREN) == 0) {
  172                 device_printf(dev, "Can't enable PCI busmaster\n");
  173                 return (ENXIO);
  174         }
  175         if ((command & PCIM_CMD_MEMEN) == 0) {
  176                 device_printf(dev, "PCI memory window not available\n");
  177                 return (ENXIO);
  178         }
  179 
  180         /* Allocate PCI registers */
  181         sc->mfi_regs_rid = PCIR_BAR(0);
  182         if ((sc->mfi_regs_resource = bus_alloc_resource_any(sc->mfi_dev,
  183             SYS_RES_MEMORY, &sc->mfi_regs_rid, RF_ACTIVE)) == NULL) {
  184                 device_printf(dev, "Cannot allocate PCI registers\n");
  185                 return (ENXIO);
  186         }
  187         sc->mfi_btag = rman_get_bustag(sc->mfi_regs_resource);
  188         sc->mfi_bhandle = rman_get_bushandle(sc->mfi_regs_resource);
  189 
  190         error = ENOMEM;
  191 
  192         /* Allocate parent DMA tag */
  193         if (bus_dma_tag_create( NULL,                   /* parent */
  194                                 1, 0,                   /* algnmnt, boundary */
  195                                 BUS_SPACE_MAXADDR,      /* lowaddr */
  196                                 BUS_SPACE_MAXADDR,      /* highaddr */
  197                                 NULL, NULL,             /* filter, filterarg */
  198                                 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
  199                                 BUS_SPACE_UNRESTRICTED, /* nsegments */
  200                                 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
  201                                 0,                      /* flags */
  202                                 NULL, NULL,             /* lockfunc, lockarg */
  203                                 &sc->mfi_parent_dmat)) {
  204                 device_printf(dev, "Cannot allocate parent DMA tag\n");
  205                 goto out;
  206         }
  207 
  208         m = mfi_find_ident(dev);
  209         sc->mfi_flags = m->flags;
  210 
  211         error = mfi_attach(sc);
  212 out:
  213         if (error) {
  214                 mfi_free(sc);
  215                 mfi_pci_free(sc);
  216         }
  217 
  218         return (error);
  219 }
  220 
  221 static int
  222 mfi_pci_detach(device_t dev)
  223 {
  224         struct mfi_softc *sc;
  225         struct mfi_disk *ld;
  226         int error;
  227 
  228         sc = device_get_softc(dev);
  229 
  230         sx_xlock(&sc->mfi_config_lock);
  231         mtx_lock(&sc->mfi_io_lock);
  232         if ((sc->mfi_flags & MFI_FLAGS_OPEN) != 0) {
  233                 mtx_unlock(&sc->mfi_io_lock);
  234                 sx_xunlock(&sc->mfi_config_lock);
  235                 return (EBUSY);
  236         }
  237         sc->mfi_detaching = 1;
  238         mtx_unlock(&sc->mfi_io_lock);
  239 
  240         while ((ld = TAILQ_FIRST(&sc->mfi_ld_tqh)) != NULL) {
  241                 if ((error = device_delete_child(dev, ld->ld_dev)) != 0) {
  242                         sc->mfi_detaching = 0;
  243                         sx_xunlock(&sc->mfi_config_lock);
  244                         return (error);
  245                 }
  246         }
  247         sx_xunlock(&sc->mfi_config_lock);
  248 
  249         EVENTHANDLER_DEREGISTER(shutdown_final, sc->mfi_eh);
  250 
  251         mfi_shutdown(sc);
  252         mfi_free(sc);
  253         mfi_pci_free(sc);
  254         return (0);
  255 }
  256 
  257 static void
  258 mfi_pci_free(struct mfi_softc *sc)
  259 {
  260 
  261         if (sc->mfi_regs_resource != NULL) {
  262                 bus_release_resource(sc->mfi_dev, SYS_RES_MEMORY,
  263                     sc->mfi_regs_rid, sc->mfi_regs_resource);
  264         }
  265 
  266         return;
  267 }
  268 
  269 static int
  270 mfi_pci_suspend(device_t dev)
  271 {
  272 
  273         return (EINVAL);
  274 }
  275 
  276 static int
  277 mfi_pci_resume(device_t dev)
  278 {
  279 
  280         return (EINVAL);
  281 }

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