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, 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