drivers/gpu/drm/nouveau/nvkm/subdev/pci/g92.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
  26 int
  27 g92_pcie_version_supported(struct nvkm_pci *pci)
  28 {
  29         if ((nvkm_pci_rd32(pci, 0x460) & 0x200) == 0x200)
  30                 return 2;
  31         return 1;
  32 }
  33
  34 static const struct nvkm_pci_func
  35 g92_pci_func = {
  36         .init = g84_pci_init,
  37         .rd32 = nv40_pci_rd32,
  38         .wr08 = nv40_pci_wr08,
  39         .wr32 = nv40_pci_wr32,
  40         .msi_rearm = nv46_pci_msi_rearm,
  41
  42         .pcie.init = g84_pcie_init,
  43         .pcie.set_link = g84_pcie_set_link,
  44
  45         .pcie.max_speed = g84_pcie_max_speed,
  46         .pcie.cur_speed = g84_pcie_cur_speed,
  47
  48         .pcie.set_version = g84_pcie_set_version,
  49         .pcie.version = g84_pcie_version,
  50         .pcie.version_supported = g92_pcie_version_supported,
  51 };
  52
  53 int
  54 g92_pci_new(struct nvkm_device *device, int index, struct nvkm_pci **ppci)
  55 {
  56         return nvkm_pci_new_(&g92_pci_func, device, index, ppci);
  57 }