diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/pci/gk104.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/pci/gk104.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gk104.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gk104.c new file mode 100644 index 000000000000..e68030507d88 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gk104.c @@ -0,0 +1,228 @@ +/* + * Copyright 2015 Karol Herbst <nouveau@karolherbst.de> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Karol Herbst <nouveau@karolherbst.de> + */ +#include "priv.h" + +static int +gk104_pcie_version_supported(struct nvkm_pci *pci) +{ + return (nvkm_rd32(pci->subdev.device, 0x8c1c0) & 0x4) == 0x4 ? 2 : 1; +} + +static void +gk104_pcie_set_cap_speed(struct nvkm_pci *pci, enum nvkm_pcie_speed speed) +{ + struct nvkm_device *device = pci->subdev.device; + + switch (speed) { + case NVKM_PCIE_SPEED_2_5: + gf100_pcie_set_cap_speed(pci, false); + nvkm_mask(device, 0x8c1c0, 0x30000, 0x10000); + break; + case NVKM_PCIE_SPEED_5_0: + gf100_pcie_set_cap_speed(pci, true); + nvkm_mask(device, 0x8c1c0, 0x30000, 0x20000); + break; + case NVKM_PCIE_SPEED_8_0: + gf100_pcie_set_cap_speed(pci, true); + nvkm_mask(device, 0x8c1c0, 0x30000, 0x30000); + break; + } +} + +static enum nvkm_pcie_speed +gk104_pcie_cap_speed(struct nvkm_pci *pci) +{ + int speed = gf100_pcie_cap_speed(pci); + + if (speed == 0) + return NVKM_PCIE_SPEED_2_5; + + if (speed >= 1) { + int speed2 = nvkm_rd32(pci->subdev.device, 0x8c1c0) & 0x30000; + switch (speed2) { + case 0x00000: + case 0x10000: + return NVKM_PCIE_SPEED_2_5; + case 0x20000: + return NVKM_PCIE_SPEED_5_0; + case 0x30000: + return NVKM_PCIE_SPEED_8_0; + } + } + + return -EINVAL; +} + +static void +gk104_pcie_set_lnkctl_speed(struct nvkm_pci *pci, enum nvkm_pcie_speed speed) +{ + u8 reg_v = 0; + switch (speed) { + case NVKM_PCIE_SPEED_2_5: + reg_v = 1; + break; + case NVKM_PCIE_SPEED_5_0: + reg_v = 2; + break; + case NVKM_PCIE_SPEED_8_0: + reg_v = 3; + break; + } + nvkm_pci_mask(pci, 0xa8, 0x3, reg_v); +} + +static enum nvkm_pcie_speed +gk104_pcie_lnkctl_speed(struct nvkm_pci *pci) +{ + u8 reg_v = nvkm_pci_rd32(pci, 0xa8) & 0x3; + switch (reg_v) { + case 0: + case 1: + return NVKM_PCIE_SPEED_2_5; + case 2: + return NVKM_PCIE_SPEED_5_0; + case 3: + return NVKM_PCIE_SPEED_8_0; + } + return -1; +} + +static enum nvkm_pcie_speed +gk104_pcie_max_speed(struct nvkm_pci *pci) +{ + u32 max_speed = nvkm_rd32(pci->subdev.device, 0x8c1c0) & 0x300000; + switch (max_speed) { + case 0x000000: + return NVKM_PCIE_SPEED_8_0; + case 0x100000: + return NVKM_PCIE_SPEED_5_0; + case 0x200000: + return NVKM_PCIE_SPEED_2_5; + } + return NVKM_PCIE_SPEED_2_5; +} + +static void +gk104_pcie_set_link_speed(struct nvkm_pci *pci, enum nvkm_pcie_speed speed) +{ + struct nvkm_device *device = pci->subdev.device; + u32 mask_value; + + switch (speed) { + case NVKM_PCIE_SPEED_8_0: + mask_value = 0x00000; + break; + case NVKM_PCIE_SPEED_5_0: + mask_value = 0x40000; + break; + case NVKM_PCIE_SPEED_2_5: + default: + mask_value = 0x80000; + break; + } + + nvkm_mask(device, 0x8c040, 0xc0000, mask_value); + nvkm_mask(device, 0x8c040, 0x1, 0x1); +} + +static int +gk104_pcie_init(struct nvkm_pci * pci) +{ + enum nvkm_pcie_speed lnkctl_speed, max_speed, cap_speed; + struct nvkm_subdev *subdev = &pci->subdev; + + if (gf100_pcie_version(pci) < 2) + return 0; + + lnkctl_speed = gk104_pcie_lnkctl_speed(pci); + max_speed = gk104_pcie_max_speed(pci); + cap_speed = gk104_pcie_cap_speed(pci); + + if (cap_speed != max_speed) { + nvkm_trace(subdev, "adjusting cap to max speed\n"); + gk104_pcie_set_cap_speed(pci, max_speed); + cap_speed = gk104_pcie_cap_speed(pci); + if (cap_speed != max_speed) + nvkm_warn(subdev, "failed to adjust cap speed\n"); + } + + if (lnkctl_speed != max_speed) { + nvkm_debug(subdev, "adjusting lnkctl to max speed\n"); + gk104_pcie_set_lnkctl_speed(pci, max_speed); + lnkctl_speed = gk104_pcie_lnkctl_speed(pci); + if (lnkctl_speed != max_speed) + nvkm_error(subdev, "failed to adjust lnkctl speed\n"); + } + + return 0; +} + +static int +gk104_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width) +{ + struct nvkm_subdev *subdev = &pci->subdev; + enum nvkm_pcie_speed lnk_ctl_speed = gk104_pcie_lnkctl_speed(pci); + enum nvkm_pcie_speed lnk_cap_speed = gk104_pcie_cap_speed(pci); + + if (speed > lnk_cap_speed) { + speed = lnk_cap_speed; + nvkm_warn(subdev, "dropping requested speed due too low cap" + " speed\n"); + } + + if (speed > lnk_ctl_speed) { + speed = lnk_ctl_speed; + nvkm_warn(subdev, "dropping requested speed due too low" + " lnkctl speed\n"); + } + + gk104_pcie_set_link_speed(pci, speed); + return 0; +} + + +static const struct nvkm_pci_func +gk104_pci_func = { + .init = g84_pci_init, + .rd32 = nv40_pci_rd32, + .wr08 = nv40_pci_wr08, + .wr32 = nv40_pci_wr32, + .msi_rearm = nv40_pci_msi_rearm, + + .pcie.init = gk104_pcie_init, + .pcie.set_link = gk104_pcie_set_link, + + .pcie.max_speed = gk104_pcie_max_speed, + .pcie.cur_speed = g84_pcie_cur_speed, + + .pcie.set_version = gf100_pcie_set_version, + .pcie.version = gf100_pcie_version, + .pcie.version_supported = gk104_pcie_version_supported, +}; + +int +gk104_pci_new(struct nvkm_device *device, int index, struct nvkm_pci **ppci) +{ + return nvkm_pci_new_(&gk104_pci_func, device, index, ppci); +} |