diff options
| -rw-r--r-- | drivers/gpu/drm/nouveau/include/nvkm/subdev/pci.h | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/pci/Kbuild | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/pci/pcie.c | 165 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/pci/priv.h | 16 |
5 files changed, 210 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/pci.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/pci.h index 17fe7b747be4..ddb913889d7e 100644 --- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/pci.h +++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/pci.h @@ -2,6 +2,12 @@ #define __NVKM_PCI_H__ #include <core/subdev.h> +enum nvkm_pcie_speed { + NVKM_PCIE_SPEED_2_5, + NVKM_PCIE_SPEED_5_0, + NVKM_PCIE_SPEED_8_0, +}; + struct nvkm_pci { const struct nvkm_pci_func *func; struct nvkm_subdev subdev; @@ -18,6 +24,11 @@ struct nvkm_pci { bool acquired; } agp; + struct { + enum nvkm_pcie_speed speed; + u8 width; + } pcie; + bool msi; }; @@ -36,4 +47,7 @@ int g94_pci_new(struct nvkm_device *, int, struct nvkm_pci **); int gf100_pci_new(struct nvkm_device *, int, struct nvkm_pci **); int gf106_pci_new(struct nvkm_device *, int, struct nvkm_pci **); int gk104_pci_new(struct nvkm_device *, int, struct nvkm_pci **); + +/* pcie functions */ +int nvkm_pcie_set_link(struct nvkm_pci *, enum nvkm_pcie_speed, u8 width); #endif diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/Kbuild b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/Kbuild index 724afd4a1713..3c2519fdeb81 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/Kbuild +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/Kbuild @@ -1,5 +1,6 @@ nvkm-y += nvkm/subdev/pci/agp.o nvkm-y += nvkm/subdev/pci/base.o +nvkm-y += nvkm/subdev/pci/pcie.o nvkm-y += nvkm/subdev/pci/nv04.o nvkm-y += nvkm/subdev/pci/nv40.o nvkm-y += nvkm/subdev/pci/nv46.o diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c index d671dcfaff3c..65057c8310a2 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c @@ -107,6 +107,15 @@ nvkm_pci_preinit(struct nvkm_subdev *subdev) } static int +nvkm_pci_oneinit(struct nvkm_subdev *subdev) +{ + struct nvkm_pci *pci = nvkm_pci(subdev); + if (pci_is_pcie(pci->pdev)) + return nvkm_pcie_oneinit(pci); + return 0; +} + +static int nvkm_pci_init(struct nvkm_subdev *subdev) { struct nvkm_pci *pci = nvkm_pci(subdev); @@ -117,6 +126,8 @@ nvkm_pci_init(struct nvkm_subdev *subdev) ret = nvkm_agp_init(pci); if (ret) return ret; + } else if (pci_is_pcie(pci->pdev)) { + nvkm_pcie_init(pci); } if (pci->func->init) @@ -143,6 +154,7 @@ nvkm_pci_dtor(struct nvkm_subdev *subdev) static const struct nvkm_subdev_func nvkm_pci_func = { .dtor = nvkm_pci_dtor, + .oneinit = nvkm_pci_oneinit, .preinit = nvkm_pci_preinit, .init = nvkm_pci_init, .fini = nvkm_pci_fini, @@ -160,6 +172,8 @@ nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device, pci->func = func; pci->pdev = device->func->pci(device)->pdev; pci->irq = -1; + pci->pcie.speed = -1; + pci->pcie.width = -1; if (device->type == NVKM_DEVICE_AGP) nvkm_agp_ctor(pci); diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/pcie.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/pcie.c new file mode 100644 index 000000000000..b32954f5311e --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/pcie.c @@ -0,0 +1,165 @@ +/* + * 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 <git@karolherbst.de> + */ +#include "priv.h" + +static char *nvkm_pcie_speeds[] = { + "2.5GT/s", + "5.0GT/s", + "8.0GT/s", +}; + +static enum nvkm_pcie_speed +nvkm_pcie_speed(enum pci_bus_speed speed) +{ + switch (speed) { + case PCIE_SPEED_2_5GT: + return NVKM_PCIE_SPEED_2_5; + case PCIE_SPEED_5_0GT: + return NVKM_PCIE_SPEED_5_0; + case PCIE_SPEED_8_0GT: + return NVKM_PCIE_SPEED_8_0; + default: + /* XXX 0x16 is 8_0, assume 0x17 will be 16_0 for now */ + if (speed == 0x17) + return NVKM_PCIE_SPEED_8_0; + return -1; + } +} + +static int +nvkm_pcie_get_version(struct nvkm_pci *pci) +{ + if (!pci->func->pcie.version) + return -ENOSYS; + + return pci->func->pcie.version(pci); +} + +static int +nvkm_pcie_get_max_version(struct nvkm_pci *pci) +{ + if (!pci->func->pcie.version_supported) + return -ENOSYS; + + return pci->func->pcie.version_supported(pci); +} + +static int +nvkm_pcie_set_version(struct nvkm_pci *pci, int version) +{ + if (!pci->func->pcie.set_version) + return -ENOSYS; + + nvkm_trace(&pci->subdev, "set to version %i\n", version); + pci->func->pcie.set_version(pci, version); + return nvkm_pcie_get_version(pci); +} + +int +nvkm_pcie_oneinit(struct nvkm_pci *pci) +{ + if (pci->func->pcie.max_speed) + nvkm_debug(&pci->subdev, "pcie max speed: %s\n", + nvkm_pcie_speeds[pci->func->pcie.max_speed(pci)]); + return 0; +} + +int +nvkm_pcie_init(struct nvkm_pci *pci) +{ + struct nvkm_subdev *subdev = &pci->subdev; + int ret; + + /* raise pcie version first */ + ret = nvkm_pcie_get_version(pci); + if (ret > 0) { + int max_version = nvkm_pcie_get_max_version(pci); + if (max_version > 0 && max_version > ret) + ret = nvkm_pcie_set_version(pci, max_version); + + if (ret < max_version) + nvkm_error(subdev, "couldn't raise version: %i\n", ret); + } + + if (pci->func->pcie.init) + pci->func->pcie.init(pci); + + if (pci->pcie.speed != -1) + nvkm_pcie_set_link(pci, pci->pcie.speed, pci->pcie.width); + + return 0; +} + +int +nvkm_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width) +{ + struct nvkm_subdev *subdev = &pci->subdev; + enum nvkm_pcie_speed cur_speed, max_speed; + struct pci_bus *pbus; + int ret; + + if (pci || !pci_is_pcie(pci->pdev)) + return 0; + pbus = pci->pdev->bus; + + if (!pci->func->pcie.set_link) + return -ENOSYS; + + nvkm_trace(subdev, "requested %s\n", nvkm_pcie_speeds[speed]); + + if (pci->func->pcie.version(pci) < 2) { + nvkm_error(subdev, "setting link failed due to low version\n"); + return -ENODEV; + } + + cur_speed = pci->func->pcie.cur_speed(pci); + max_speed = min(nvkm_pcie_speed(pbus->max_bus_speed), + pci->func->pcie.max_speed(pci)); + + nvkm_trace(subdev, "current speed: %s\n", nvkm_pcie_speeds[cur_speed]); + + if (speed > max_speed) { + nvkm_debug(subdev, "%s not supported by bus or card, dropping" + "requested speed to %s", nvkm_pcie_speeds[speed], + nvkm_pcie_speeds[max_speed]); + speed = max_speed; + } + + pci->pcie.speed = speed; + pci->pcie.width = width; + + if (speed == cur_speed) { + nvkm_debug(subdev, "requested matches current speed\n"); + return speed; + } + + nvkm_debug(subdev, "set link to %s x%i\n", + nvkm_pcie_speeds[speed], width); + + ret = pci->func->pcie.set_link(pci, speed, width); + if (ret < 0) + nvkm_error(subdev, "setting link failed: %i\n", ret); + + return ret; +} diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/priv.h b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/priv.h index cf46d38d0b0a..79eb9795dda1 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/priv.h +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/priv.h @@ -12,6 +12,18 @@ struct nvkm_pci_func { void (*wr08)(struct nvkm_pci *, u16 addr, u8 data); void (*wr32)(struct nvkm_pci *, u16 addr, u32 data); void (*msi_rearm)(struct nvkm_pci *); + + struct { + int (*init)(struct nvkm_pci *); + int (*set_link)(struct nvkm_pci *, enum nvkm_pcie_speed, u8); + + enum nvkm_pcie_speed (*max_speed)(struct nvkm_pci *); + enum nvkm_pcie_speed (*cur_speed)(struct nvkm_pci *); + + void (*set_version)(struct nvkm_pci *, u8); + int (*version)(struct nvkm_pci *); + int (*version_supported)(struct nvkm_pci *); + } pcie; }; u32 nv40_pci_rd32(struct nvkm_pci *, u16); @@ -22,4 +34,8 @@ void nv40_pci_msi_rearm(struct nvkm_pci *); void nv46_pci_msi_rearm(struct nvkm_pci *); void g84_pci_init(struct nvkm_pci *pci); + +/* pcie functions */ +int nvkm_pcie_oneinit(struct nvkm_pci *); +int nvkm_pcie_init(struct nvkm_pci *); #endif |