drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf100.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 static void
  27 gf100_pci_msi_rearm(struct nvkm_pci *pci)
  28 {
  29         nvkm_pci_wr08(pci, 0x0704, 0xff);
  30 }
  31
  32 void
  33 gf100_pcie_set_version(struct nvkm_pci *pci, u8 ver)
  34 {
  35         struct nvkm_device *device = pci->subdev.device;
  36         nvkm_mask(device, 0x02241c, 0x1, ver > 1 ? 1 : 0);
  37 }
  38
  39 int
  40 gf100_pcie_version(struct nvkm_pci *pci)
  41 {
  42         struct nvkm_device *device = pci->subdev.device;
  43         return (nvkm_rd32(device, 0x02241c) & 0x1) + 1;
  44 }
  45
  46 void
  47 gf100_pcie_set_cap_speed(struct nvkm_pci *pci, bool full_speed)
  48 {
  49         struct nvkm_device *device = pci->subdev.device;
  50         nvkm_mask(device, 0x02241c, 0x80, full_speed ? 0x80 : 0x0);
  51 }
  52
  53 int
  54 gf100_pcie_cap_speed(struct nvkm_pci *pci)
  55 {
  56         struct nvkm_device *device = pci->subdev.device;
  57         u8 punits_pci_cap_speed = nvkm_rd32(device, 0x02241c) & 0x80;
  58         if (punits_pci_cap_speed == 0x80)
  59                 return 1;
  60         return 0;
  61 }
  62
  63 int
  64 gf100_pcie_init(struct nvkm_pci *pci)
  65 {
  66         bool full_speed = g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0;
  67         gf100_pcie_set_cap_speed(pci, full_speed);
  68         return 0;
  69 }
  70
  71 int
  72 gf100_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
  73 {
  74         gf100_pcie_set_cap_speed(pci, speed == NVKM_PCIE_SPEED_5_0);
  75         g84_pcie_set_link_speed(pci, speed);
  76         return 0;
  77 }
  78
  79 static const struct nvkm_pci_func
  80 gf100_pci_func = {
  81         .init = g84_pci_init,
  82         .rd32 = nv40_pci_rd32,
  83         .wr08 = nv40_pci_wr08,
  84         .wr32 = nv40_pci_wr32,
  85         .msi_rearm = gf100_pci_msi_rearm,
  86
  87         .pcie.init = gf100_pcie_init,
  88         .pcie.set_link = gf100_pcie_set_link,
  89
  90         .pcie.max_speed = g84_pcie_max_speed,
  91         .pcie.cur_speed = g84_pcie_cur_speed,
  92
  93         .pcie.set_version = gf100_pcie_set_version,
  94         .pcie.version = gf100_pcie_version,
  95         .pcie.version_supported = g92_pcie_version_supported,
  96 };
  97
  98 int
  99 gf100_pci_new(struct nvkm_device *device, int index, struct nvkm_pci **ppci)
 100 {
 101         return nvkm_pci_new_(&gf100_pci_func, device, index, ppci);
 102 }