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1/*2 * Copyright 2015 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs <bskeggs@redhat.com>23 */24#include "priv.h"25 26static void27gf100_pci_msi_rearm(struct nvkm_pci *pci)28{29 nvkm_pci_wr08(pci, 0x0704, 0xff);30}31 32void33gf100_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 39int40gf100_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 46void47gf100_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 53int54gf100_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 63int64gf100_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 71int72gf100_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 79static const struct nvkm_pci_func80gf100_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 98int99gf100_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,100 struct nvkm_pci **ppci)101{102 return nvkm_pci_new_(&gf100_pci_func, device, type, inst, ppci);103}104