sys/dev/nvme/nvme_ahci.c

   1 /*-
   2  * Copyright (C) 2017 Olivier Houchard
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  */
  25
  26 #include <sys/cdefs.h>
  27 __FBSDID("$FreeBSD$");
  28 #include <sys/param.h>
  29 #include <sys/systm.h>
  30 #include <sys/buf.h>
  31 #include <sys/bus.h>
  32 #include <sys/conf.h>
  33 #include <sys/proc.h>
  34 #include <sys/smp.h>
  35
  36 #include "nvme_private.h"
  37
  38 static int    nvme_ahci_probe(device_t dev);
  39 static int    nvme_ahci_attach(device_t dev);
  40 static int    nvme_ahci_detach(device_t dev);
  41
  42 static device_method_t nvme_ahci_methods[] = {
  43         /* Device interface */
  44         DEVMETHOD(device_probe,     nvme_ahci_probe),
  45         DEVMETHOD(device_attach,    nvme_ahci_attach),
  46         DEVMETHOD(device_detach,    nvme_ahci_detach),
  47         DEVMETHOD(device_shutdown,  nvme_shutdown),
  48         { 0, 0 }
  49 };
  50
  51 static driver_t nvme_ahci_driver = {
  52         "nvme",
  53         nvme_ahci_methods,
  54         sizeof(struct nvme_controller),
  55 };
  56
  57 DRIVER_MODULE(nvme, ahci, nvme_ahci_driver, nvme_devclass, NULL, 0);
  58
  59 static int
  60 nvme_ahci_probe (device_t device)
  61 {
  62         return (0);
  63 }
  64
  65 static int
  66 nvme_ahci_attach(device_t dev)
  67 {
  68         struct nvme_controller*ctrlr = DEVICE2SOFTC(dev);
  69         int ret;
  70
  71         /* Map MMIO registers */
  72         ctrlr->resource_id = 0;
  73
  74         ctrlr->resource = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
  75             &ctrlr->resource_id, RF_ACTIVE);
  76
  77         if(ctrlr->resource == NULL) {
  78                 nvme_printf(ctrlr, "unable to allocate mem resource\n");
  79                 ret = ENOMEM;
  80                 goto bad;
  81         }
  82         ctrlr->bus_tag = rman_get_bustag(ctrlr->resource);
  83         ctrlr->bus_handle = rman_get_bushandle(ctrlr->resource);
  84         ctrlr->regs = (struct nvme_registers *)ctrlr->bus_handle;
  85
  86         /* Allocate and setup IRQ */
  87         ctrlr->rid = 0;
  88         ctrlr->res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
  89             &ctrlr->rid, RF_SHAREABLE | RF_ACTIVE);
  90
  91         if (ctrlr->res == NULL) {
  92                 nvme_printf(ctrlr, "unable to allocate shared IRQ\n");
  93                 ret = ENOMEM;
  94                 goto bad;
  95         }
  96
  97         ctrlr->msix_enabled = 0;
  98         ctrlr->num_io_queues = 1;
  99         if (bus_setup_intr(dev, ctrlr->res,
 100             INTR_TYPE_MISC | INTR_MPSAFE, NULL, nvme_ctrlr_intx_handler,
 101             ctrlr, &ctrlr->tag) != 0) {
 102                 nvme_printf(ctrlr, "unable to setup intx handler\n");
 103                 ret = ENOMEM;
 104                 goto bad;
 105         }
 106         ctrlr->tag = (void *)0x1;
 107
 108         return nvme_attach(dev);
 109 bad:
 110         if (ctrlr->resource != NULL) {
 111                 bus_release_resource(dev, SYS_RES_MEMORY,
 112                     ctrlr->resource_id, ctrlr->resource);
 113         }
 114         if (ctrlr->res)
 115                 bus_release_resource(ctrlr->dev, SYS_RES_IRQ,
 116                     rman_get_rid(ctrlr->res), ctrlr->res);
 117         return (ret);
 118 }
 119
 120 static int
 121 nvme_ahci_detach(device_t dev)
 122 {
 123
 124         return (nvme_detach(dev));
 125 }