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 u32
  50 nvkm_pci_mask(struct nvkm_pci *pci, u16 addr, u32 mask, u32 value)
  51 {
  52         u32 data = pci->func->rd32(pci, addr);
  53         pci->func->wr32(pci, addr, (data & ~mask) | value);
  54         return data;
  55 }
  56
  57 void
  58 nvkm_pci_rom_shadow(struct nvkm_pci *pci, bool shadow)
  59 {
  60         u32 data = nvkm_pci_rd32(pci, 0x0050);
  61         if (shadow)
  62                 data |=  0x00000001;
  63         else
  64                 data &= ~0x00000001;
  65         nvkm_pci_wr32(pci, 0x0050, data);
  66 }
  67
  68 static irqreturn_t
  69 nvkm_pci_intr(int irq, void *arg)
  70 {
  71         struct nvkm_pci *pci = arg;
  72         struct nvkm_device *device = pci->subdev.device;
  73         bool handled = false;
  74         nvkm_mc_intr_unarm(device);
  75         if (pci->msi)
  76                 pci->func->msi_rearm(pci);
  77         nvkm_mc_intr(device, &handled);
  78         nvkm_mc_intr_rearm(device);
  79         return handled ? IRQ_HANDLED : IRQ_NONE;
  80 }
  81
  82 static int
  83 nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
  84 {
  85         struct nvkm_pci *pci = nvkm_pci(subdev);
  86
  87         if (pci->irq >= 0) {
  88                 free_irq(pci->irq, pci);
  89                 pci->irq = -1;
  90         };
  91
  92         if (pci->agp.bridge)
  93                 nvkm_agp_fini(pci);
  94
  95         return 0;
  96 }
  97
  98 static int
  99 nvkm_pci_preinit(struct nvkm_subdev *subdev)
 100 {
 101         struct nvkm_pci *pci = nvkm_pci(subdev);
 102         if (pci->agp.bridge)
 103                 nvkm_agp_preinit(pci);
 104         return 0;
 105 }
 106
 107 static int
 108 nvkm_pci_oneinit(struct nvkm_subdev *subdev)
 109 {
 110         struct nvkm_pci *pci = nvkm_pci(subdev);
 111         if (pci_is_pcie(pci->pdev))
 112                 return nvkm_pcie_oneinit(pci);
 113         return 0;
 114 }
 115
 116 static int
 117 nvkm_pci_init(struct nvkm_subdev *subdev)
 118 {
 119         struct nvkm_pci *pci = nvkm_pci(subdev);
 120         struct pci_dev *pdev = pci->pdev;
 121         int ret;
 122
 123         if (pci->agp.bridge) {
 124                 ret = nvkm_agp_init(pci);
 125                 if (ret)
 126                         return ret;
 127         } else if (pci_is_pcie(pci->pdev)) {
 128                 nvkm_pcie_init(pci);
 129         }
 130
 131         if (pci->func->init)
 132                 pci->func->init(pci);
 133
 134         ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci);
 135         if (ret)
 136                 return ret;
 137
 138         pci->irq = pdev->irq;
 139         return ret;
 140 }
 141
 142 static void *
 143 nvkm_pci_dtor(struct nvkm_subdev *subdev)
 144 {
 145         struct nvkm_pci *pci = nvkm_pci(subdev);
 146         nvkm_agp_dtor(pci);
 147         if (pci->msi)
 148                 pci_disable_msi(pci->pdev);
 149         return nvkm_pci(subdev);
 150 }
 151
 152 static const struct nvkm_subdev_func
 153 nvkm_pci_func = {
 154         .dtor = nvkm_pci_dtor,
 155         .oneinit = nvkm_pci_oneinit,
 156         .preinit = nvkm_pci_preinit,
 157         .init = nvkm_pci_init,
 158         .fini = nvkm_pci_fini,
 159 };
 160
 161 int
 162 nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
 163               int index, struct nvkm_pci **ppci)
 164 {
 165         struct nvkm_pci *pci;
 166
 167         if (!(pci = *ppci = kzalloc(sizeof(**ppci), GFP_KERNEL)))
 168                 return -ENOMEM;
 169         nvkm_subdev_ctor(&nvkm_pci_func, device, index, &pci->subdev);
 170         pci->func = func;
 171         pci->pdev = device->func->pci(device)->pdev;
 172         pci->irq = -1;
 173         pci->pcie.speed = -1;
 174         pci->pcie.width = -1;
 175
 176         if (device->type == NVKM_DEVICE_AGP)
 177                 nvkm_agp_ctor(pci);
 178
 179         switch (pci->pdev->device & 0x0ff0) {
 180         case 0x00f0:
 181         case 0x02e0:
 182                 /* BR02? NFI how these would be handled yet exactly */
 183                 break;
 184         default:
 185                 switch (device->chipset) {
 186                 case 0xaa:
 187                         /* reported broken, nv also disable it */
 188                         break;
 189                 default:
 190                         pci->msi = true;
 191                         break;
 192                 }
 193         }
 194
 195 #ifdef __BIG_ENDIAN
 196         pci->msi = false;
 197 #endif
 198
 199         pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi);
 200         if (pci->msi && func->msi_rearm) {
 201                 pci->msi = pci_enable_msi(pci->pdev) == 0;
 202                 if (pci->msi)
 203                         nvkm_debug(&pci->subdev, "MSI enabled\n");
 204         } else {
 205                 pci->msi = false;
 206         }
 207
 208         return 0;
 209 }