From: Karol Herbst Date: Tue, 5 Jan 2016 20:44:52 +0000 (+0100) Subject: drm/nouveau/pci: implement pcie speed change for kepler+ X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3aba825ffa6615971bb5feae57806288c14d4096;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/nouveau/pci: implement pcie speed change for kepler+ v2: rename functions v3: remove pcie2 accessors v6: fix alignement and line width, also remove useless code Signed-off-by: Karol Herbst --- diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gk104.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gk104.c index 5aaf6c7c01a9..e68030507d88 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gk104.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gk104.c @@ -23,6 +23,185 @@ */ #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, @@ -30,6 +209,16 @@ gk104_pci_func = { .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