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

     /*-
      * Copyright (c) 2006 IronPort Systems
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    /*-
     * Copyright (c) 2007 LSI Corp.
     * Copyright (c) 2007 Rajesh Prabhakaran.
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/8.3/sys/dev/mfi/mfi_pci.c 230714 2012-01-29 01:22:48Z marius $");
    
    /* PCI/PCI-X/PCIe bus interface for the LSI MegaSAS controllers */
    
    #include "opt_mfi.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/selinfo.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    #include <sys/conf.h>
    #include <sys/bio.h>
    #include <sys/malloc.h>
    #include <sys/sysctl.h>
    #include <sys/uio.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    #include <sys/rman.h>
    
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcivar.h>
    
    #include <dev/mfi/mfireg.h>
    #include <dev/mfi/mfi_ioctl.h>
    #include <dev/mfi/mfivar.h>
    
    static int      mfi_pci_probe(device_t);
    static int      mfi_pci_attach(device_t);
    static int      mfi_pci_detach(device_t);
    static int      mfi_pci_suspend(device_t);
    static int      mfi_pci_resume(device_t);
    static void     mfi_pci_free(struct mfi_softc *);
    
    static device_method_t mfi_methods[] = {
            DEVMETHOD(device_probe,         mfi_pci_probe),
            DEVMETHOD(device_attach,        mfi_pci_attach),
            DEVMETHOD(device_detach,        mfi_pci_detach),
            DEVMETHOD(device_suspend,       mfi_pci_suspend),
            DEVMETHOD(device_resume,        mfi_pci_resume),
    
            DEVMETHOD_END
    };
    
   static driver_t mfi_pci_driver = {
           "mfi",
           mfi_methods,
           sizeof(struct mfi_softc)
   };
   
   static devclass_t       mfi_devclass;
   DRIVER_MODULE(mfi, pci, mfi_pci_driver, mfi_devclass, 0, 0);
   MODULE_VERSION(mfi, 1);
   
   static int      mfi_msi = 0;
   TUNABLE_INT("hw.mfi.msi", &mfi_msi);
   SYSCTL_INT(_hw_mfi, OID_AUTO, msi, CTLFLAG_RDTUN, &mfi_msi, 0,
       "Enable use of MSI interrupts");
   
   struct mfi_ident {
           uint16_t        vendor;
           uint16_t        device;
           uint16_t        subvendor;
           uint16_t        subdevice;
           int             flags;
           const char      *desc;
   } mfi_identifiers[] = {
           {0x1000, 0x0060, 0x1028, 0xffff, MFI_FLAGS_1078,  "Dell PERC 6"},
           {0x1000, 0x0060, 0xffff, 0xffff, MFI_FLAGS_1078,  "LSI MegaSAS 1078"},
           {0x1000, 0x0078, 0xffff, 0xffff, MFI_FLAGS_GEN2,  "LSI MegaSAS Gen2"},
           {0x1000, 0x0079, 0x1028, 0x1f15, MFI_FLAGS_GEN2,  "Dell PERC H800 Adapter"},
           {0x1000, 0x0079, 0x1028, 0x1f16, MFI_FLAGS_GEN2,  "Dell PERC H700 Adapter"},
           {0x1000, 0x0079, 0x1028, 0x1f17, MFI_FLAGS_GEN2,  "Dell PERC H700 Integrated"},
           {0x1000, 0x0079, 0x1028, 0x1f18, MFI_FLAGS_GEN2,  "Dell PERC H700 Modular"},
           {0x1000, 0x0079, 0x1028, 0x1f19, MFI_FLAGS_GEN2,  "Dell PERC H700"},
           {0x1000, 0x0079, 0x1028, 0x1f1b, MFI_FLAGS_GEN2,  "Dell PERC H800"},
           {0x1000, 0x0079, 0x1028, 0xffff, MFI_FLAGS_GEN2,  "Dell PERC Gen2"},
           {0x1000, 0x0079, 0xffff, 0xffff, MFI_FLAGS_GEN2,  "LSI MegaSAS Gen2"},
           {0x1000, 0x007c, 0xffff, 0xffff, MFI_FLAGS_1078,  "LSI MegaSAS 1078"},
           {0x1000, 0x0411, 0xffff, 0xffff, MFI_FLAGS_1064R, "LSI MegaSAS 1064R"}, /* Brocton IOP */
           {0x1000, 0x0413, 0xffff, 0xffff, MFI_FLAGS_1064R, "LSI MegaSAS 1064R"}, /* Verde ZCR */
           {0x1028, 0x0015, 0xffff, 0xffff, MFI_FLAGS_1064R, "Dell PERC 5/i"},
           {0, 0, 0, 0, 0, NULL}
   };
   
   static struct mfi_ident *
   mfi_find_ident(device_t dev)
   {
           struct mfi_ident *m;
   
           for (m = mfi_identifiers; m->vendor != 0; m++) {
                   if ((m->vendor == pci_get_vendor(dev)) &&
                       (m->device == pci_get_device(dev)) &&
                       ((m->subvendor == pci_get_subvendor(dev)) ||
                       (m->subvendor == 0xffff)) &&
                       ((m->subdevice == pci_get_subdevice(dev)) ||
                       (m->subdevice == 0xffff)))
                           return (m);
           }
   
           return (NULL);
   }
   
   static int
   mfi_pci_probe(device_t dev)
   {
           struct mfi_ident *id;
   
           if ((id = mfi_find_ident(dev)) != NULL) {
                   device_set_desc(dev, id->desc);
                   return (BUS_PROBE_DEFAULT);
           }
           return (ENXIO);
   }
   
   static int
   mfi_pci_attach(device_t dev)
   {
           struct mfi_softc *sc;
           struct mfi_ident *m;
           uint32_t command;
           int count, error;
   
           sc = device_get_softc(dev);
           bzero(sc, sizeof(*sc));
           sc->mfi_dev = dev;
           m = mfi_find_ident(dev);
           sc->mfi_flags = m->flags;
   
           /* Verify that the adapter can be set up in PCI space */
           command = pci_read_config(dev, PCIR_COMMAND, 2);
           command |= PCIM_CMD_BUSMASTEREN;
           pci_write_config(dev, PCIR_COMMAND, command, 2);
           command = pci_read_config(dev, PCIR_COMMAND, 2);
           if ((command & PCIM_CMD_BUSMASTEREN) == 0) {
                   device_printf(dev, "Can't enable PCI busmaster\n");
                   return (ENXIO);
           }
           if ((command & PCIM_CMD_MEMEN) == 0) {
                   device_printf(dev, "PCI memory window not available\n");
                   return (ENXIO);
           }
   
           /* Allocate PCI registers */
           if ((sc->mfi_flags & MFI_FLAGS_1064R) ||
               (sc->mfi_flags & MFI_FLAGS_1078)) {
                   /* 1068/1078: Memory mapped BAR is at offset 0x10 */
                   sc->mfi_regs_rid = PCIR_BAR(0);
           } else if (sc->mfi_flags & MFI_FLAGS_GEN2) {
                   /* GEN2: Memory mapped BAR is at offset 0x14 */
                   sc->mfi_regs_rid = PCIR_BAR(1);
           }
           if ((sc->mfi_regs_resource = bus_alloc_resource_any(sc->mfi_dev,
               SYS_RES_MEMORY, &sc->mfi_regs_rid, RF_ACTIVE)) == NULL) {
                   device_printf(dev, "Cannot allocate PCI registers\n");
                   return (ENXIO);
           }
           sc->mfi_btag = rman_get_bustag(sc->mfi_regs_resource);
           sc->mfi_bhandle = rman_get_bushandle(sc->mfi_regs_resource);
   
           error = ENOMEM;
   
           /* Allocate parent DMA tag */
           if (bus_dma_tag_create( NULL,                   /* parent */
                                   1, 0,                   /* algnmnt, boundary */
                                   BUS_SPACE_MAXADDR,      /* lowaddr */
                                   BUS_SPACE_MAXADDR,      /* highaddr */
                                   NULL, NULL,             /* filter, filterarg */
                                   BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
                                   BUS_SPACE_UNRESTRICTED, /* nsegments */
                                   BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
                                   0,                      /* flags */
                                   NULL, NULL,             /* lockfunc, lockarg */
                                   &sc->mfi_parent_dmat)) {
                   device_printf(dev, "Cannot allocate parent DMA tag\n");
                   goto out;
           }
   
           /* Allocate IRQ resource. */
           sc->mfi_irq_rid = 0;
           count = 1;
           if (mfi_msi && pci_alloc_msi(sc->mfi_dev, &count) == 0) {
                   device_printf(sc->mfi_dev, "Using MSI\n");
                   sc->mfi_irq_rid = 1;
           }
           if ((sc->mfi_irq = bus_alloc_resource_any(sc->mfi_dev, SYS_RES_IRQ,
               &sc->mfi_irq_rid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
                   device_printf(sc->mfi_dev, "Cannot allocate interrupt\n");
                   error = EINVAL;
                   goto out;
           }
   
           error = mfi_attach(sc);
   out:
           if (error) {
                   mfi_free(sc);
                   mfi_pci_free(sc);
           }
   
           return (error);
   }
   
   static int
   mfi_pci_detach(device_t dev)
   {
           struct mfi_softc *sc;
           struct mfi_disk *ld;
           int error;
   
           sc = device_get_softc(dev);
   
           sx_xlock(&sc->mfi_config_lock);
           mtx_lock(&sc->mfi_io_lock);
           if ((sc->mfi_flags & MFI_FLAGS_OPEN) != 0) {
                   mtx_unlock(&sc->mfi_io_lock);
                   sx_xunlock(&sc->mfi_config_lock);
                   return (EBUSY);
           }
           sc->mfi_detaching = 1;
           mtx_unlock(&sc->mfi_io_lock);
   
           while ((ld = TAILQ_FIRST(&sc->mfi_ld_tqh)) != NULL) {
                   if ((error = device_delete_child(dev, ld->ld_dev)) != 0) {
                           sc->mfi_detaching = 0;
                           sx_xunlock(&sc->mfi_config_lock);
                           return (error);
                   }
           }
           sx_xunlock(&sc->mfi_config_lock);
   
           EVENTHANDLER_DEREGISTER(shutdown_final, sc->mfi_eh);
   
           mfi_shutdown(sc);
           mfi_free(sc);
           mfi_pci_free(sc);
           return (0);
   }
   
   static void
   mfi_pci_free(struct mfi_softc *sc)
   {
   
           if (sc->mfi_regs_resource != NULL) {
                   bus_release_resource(sc->mfi_dev, SYS_RES_MEMORY,
                       sc->mfi_regs_rid, sc->mfi_regs_resource);
           }
           if (sc->mfi_irq_rid != 0)
                   pci_release_msi(sc->mfi_dev);
   
           return;
   }
   
   static int
   mfi_pci_suspend(device_t dev)
   {
   
           return (EINVAL);
   }
   
   static int
   mfi_pci_resume(device_t dev)
   {
   
           return (EINVAL);
   }

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