drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c

   1 /*
   2  * Copyright 2015 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs <bskeggs@redhat.com>
  23  */
  24 #include "priv.h"
  25 #include "agp.h"
  26
  27 #include <core/option.h>
  28 #include <core/pci.h>
  29 #include <subdev/mc.h>
  30
  31 u32
  32 nvkm_pci_rd32(struct nvkm_pci *pci, u16 addr)
  33 {
  34         return pci->func->rd32(pci, addr);
  35 }
  36
  37 void
  38 nvkm_pci_wr08(struct nvkm_pci *pci, u16 addr, u8 data)
  39 {
  40         pci->func->wr08(pci, addr, data);
  41 }
  42
  43 void
  44 nvkm_pci_wr32(struct nvkm_pci *pci, u16 addr, u32 data)
  45 {
  46         pci->func->wr32(pci, addr, data);
  47 }
  48
  49 void
  50 nvkm_pci_rom_shadow(struct nvkm_pci *pci, bool shadow)
  51 {
  52         u32 data = nvkm_pci_rd32(pci, 0x0050);
  53         if (shadow)
  54                 data |=  0x00000001;
  55         else
  56                 data &= ~0x00000001;
  57         nvkm_pci_wr32(pci, 0x0050, data);
  58 }
  59
  60 static irqreturn_t
  61 nvkm_pci_intr(int irq, void *arg)
  62 {
  63         struct nvkm_pci *pci = arg;
  64         struct nvkm_mc *mc = pci->subdev.device->mc;
  65         bool handled = false;
  66         if (likely(mc)) {
  67                 nvkm_mc_intr_unarm(mc);
  68                 if (pci->msi)
  69                         pci->func->msi_rearm(pci);
  70                 nvkm_mc_intr(mc, &handled);
  71                 nvkm_mc_intr_rearm(mc);
  72         }
  73         return handled ? IRQ_HANDLED : IRQ_NONE;
  74 }
  75
  76 static int
  77 nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
  78 {
  79         struct nvkm_pci *pci = nvkm_pci(subdev);
  80
  81         if (pci->irq >= 0) {
  82                 free_irq(pci->irq, pci);
  83                 pci->irq = -1;
  84         };
  85
  86         if (pci->agp.bridge)
  87                 nvkm_agp_fini(pci);
  88
  89         return 0;
  90 }
  91
  92 static int
  93 nvkm_pci_preinit(struct nvkm_subdev *subdev)
  94 {
  95         struct nvkm_pci *pci = nvkm_pci(subdev);
  96         if (pci->agp.bridge)
  97                 nvkm_agp_preinit(pci);
  98         return 0;
  99 }
 100
 101 static int
 102 nvkm_pci_init(struct nvkm_subdev *subdev)
 103 {
 104         struct nvkm_pci *pci = nvkm_pci(subdev);
 105         struct pci_dev *pdev = pci->pdev;
 106         int ret;
 107
 108         if (pci->agp.bridge) {
 109                 ret = nvkm_agp_init(pci);
 110                 if (ret)
 111                         return ret;
 112         }
 113
 114         if (pci->func->init)
 115                 pci->func->init(pci);
 116
 117         ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci);
 118         if (ret)
 119                 return ret;
 120
 121         pci->irq = pdev->irq;
 122         return ret;
 123 }
 124
 125 static void *
 126 nvkm_pci_dtor(struct nvkm_subdev *subdev)
 127 {
 128         struct nvkm_pci *pci = nvkm_pci(subdev);
 129         nvkm_agp_dtor(pci);
 130         if (pci->msi)
 131                 pci_disable_msi(pci->pdev);
 132         return nvkm_pci(subdev);
 133 }
 134
 135 static const struct nvkm_subdev_func
 136 nvkm_pci_func = {
 137         .dtor = nvkm_pci_dtor,
 138         .preinit = nvkm_pci_preinit,
 139         .init = nvkm_pci_init,
 140         .fini = nvkm_pci_fini,
 141 };
 142
 143 int
 144 nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
 145               int index, struct nvkm_pci **ppci)
 146 {
 147         struct nvkm_pci *pci;
 148
 149         if (!(pci = *ppci = kzalloc(sizeof(**ppci), GFP_KERNEL)))
 150                 return -ENOMEM;
 151         nvkm_subdev_ctor(&nvkm_pci_func, device, index, 0, &pci->subdev);
 152         pci->func = func;
 153         pci->pdev = device->func->pci(device)->pdev;
 154         pci->irq = -1;
 155
 156         if (device->type == NVKM_DEVICE_AGP)
 157                 nvkm_agp_ctor(pci);
 158
 159         switch (pci->pdev->device & 0x0ff0) {
 160         case 0x00f0:
 161         case 0x02e0:
 162                 /* BR02? NFI how these would be handled yet exactly */
 163                 break;
 164         default:
 165                 switch (device->chipset) {
 166                 case 0xaa:
 167                         /* reported broken, nv also disable it */
 168                         break;
 169                 default:
 170                         pci->msi = true;
 171                         break;
 172                 }
 173         }
 174
 175         pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi);
 176         if (pci->msi && func->msi_rearm) {
 177                 pci->msi = pci_enable_msi(pci->pdev) == 0;
 178                 if (pci->msi)
 179                         nvkm_debug(&pci->subdev, "MSI enabled\n");
 180         } else {
 181                 pci->msi = false;
 182         }
 183
 184         return 0;
 185 }