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
  75         if (pci->irq < 0)
  76                 return IRQ_HANDLED;
  77
  78         nvkm_mc_intr_unarm(device);
  79         if (pci->msi)
  80                 pci->func->msi_rearm(pci);
  81         nvkm_mc_intr(device, &handled);
  82         nvkm_mc_intr_rearm(device);
  83         return handled ? IRQ_HANDLED : IRQ_NONE;
  84 }
  85
  86 static int
  87 nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
  88 {
  89         struct nvkm_pci *pci = nvkm_pci(subdev);
  90
  91         if (pci->agp.bridge)
  92                 nvkm_agp_fini(pci);
  93
  94         return 0;
  95 }
  96
  97 static int
  98 nvkm_pci_preinit(struct nvkm_subdev *subdev)
  99 {
 100         struct nvkm_pci *pci = nvkm_pci(subdev);
 101         if (pci->agp.bridge)
 102                 nvkm_agp_preinit(pci);
 103         return 0;
 104 }
 105
 106 static int
 107 nvkm_pci_oneinit(struct nvkm_subdev *subdev)
 108 {
 109         struct nvkm_pci *pci = nvkm_pci(subdev);
 110         struct pci_dev *pdev = pci->pdev;
 111         int ret;
 112
 113         if (pci_is_pcie(pci->pdev)) {
 114                 ret = nvkm_pcie_oneinit(pci);
 115                 if (ret)
 116                         return ret;
 117         }
 118
 119         ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci);
 120         if (ret)
 121                 return ret;
 122
 123         pci->irq = pdev->irq;
 124         return 0;
 125 }
 126
 127 static int
 128 nvkm_pci_init(struct nvkm_subdev *subdev)
 129 {
 130         struct nvkm_pci *pci = nvkm_pci(subdev);
 131         int ret;
 132
 133         if (pci->agp.bridge) {
 134                 ret = nvkm_agp_init(pci);
 135                 if (ret)
 136                         return ret;
 137         } else if (pci_is_pcie(pci->pdev)) {
 138                 nvkm_pcie_init(pci);
 139         }
 140
 141         if (pci->func->init)
 142                 pci->func->init(pci);
 143
 144         /* Ensure MSI interrupts are armed, for the case where there are
 145          * already interrupts pending (for whatever reason) at load time.
 146          */
 147         if (pci->msi)
 148                 pci->func->msi_rearm(pci);
 149
 150         return 0;
 151 }
 152
 153 static void *
 154 nvkm_pci_dtor(struct nvkm_subdev *subdev)
 155 {
 156         struct nvkm_pci *pci = nvkm_pci(subdev);
 157
 158         nvkm_agp_dtor(pci);
 159
 160         if (pci->irq >= 0) {
 161                 /* freq_irq() will call the handler, we use pci->irq == -1
 162                  * to signal that it's been torn down and should be a noop.
 163                  */
 164                 int irq = pci->irq;
 165                 pci->irq = -1;
 166                 free_irq(irq, pci);
 167         }
 168
 169         if (pci->msi)
 170                 pci_disable_msi(pci->pdev);
 171
 172         return nvkm_pci(subdev);
 173 }
 174
 175 static const struct nvkm_subdev_func
 176 nvkm_pci_func = {
 177         .dtor = nvkm_pci_dtor,
 178         .oneinit = nvkm_pci_oneinit,
 179         .preinit = nvkm_pci_preinit,
 180         .init = nvkm_pci_init,
 181         .fini = nvkm_pci_fini,
 182 };
 183
 184 int
 185 nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
 186               int index, struct nvkm_pci **ppci)
 187 {
 188         struct nvkm_pci *pci;
 189
 190         if (!(pci = *ppci = kzalloc(sizeof(**ppci), GFP_KERNEL)))
 191                 return -ENOMEM;
 192         nvkm_subdev_ctor(&nvkm_pci_func, device, index, &pci->subdev);
 193         pci->func = func;
 194         pci->pdev = device->func->pci(device)->pdev;
 195         pci->irq = -1;
 196         pci->pcie.speed = -1;
 197         pci->pcie.width = -1;
 198
 199         if (device->type == NVKM_DEVICE_AGP)
 200                 nvkm_agp_ctor(pci);
 201
 202         switch (pci->pdev->device & 0x0ff0) {
 203         case 0x00f0:
 204         case 0x02e0:
 205                 /* BR02? NFI how these would be handled yet exactly */
 206                 break;
 207         default:
 208                 switch (device->chipset) {
 209                 case 0xaa:
 210                         /* reported broken, nv also disable it */
 211                         break;
 212                 default:
 213                         pci->msi = true;
 214                         break;
 215                 }
 216         }
 217
 218 #ifdef __BIG_ENDIAN
 219         pci->msi = false;
 220 #endif
 221
 222         pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi);
 223         if (pci->msi && func->msi_rearm) {
 224                 pci->msi = pci_enable_msi(pci->pdev) == 0;
 225                 if (pci->msi)
 226                         nvkm_debug(&pci->subdev, "MSI enabled\n");
 227         } else {
 228                 pci->msi = false;
 229         }
 230
 231         return 0;
 232 }