diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.c new file mode 100644 index 000000000..21c4af3f8 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.c @@ -0,0 +1,227 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * 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: Ben Skeggs + */ +#include "priv.h" + +#include <core/option.h> +#include <subdev/top.h> + +void +nvkm_mc_unk260(struct nvkm_device *device, u32 data) +{ + struct nvkm_mc *mc = device->mc; + if (likely(mc) && mc->func->unk260) + mc->func->unk260(mc, data); +} + +void +nvkm_mc_intr_mask(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, bool en) +{ + struct nvkm_mc *mc = device->mc; + const struct nvkm_mc_map *map; + if (likely(mc) && mc->func->intr_mask) { + u32 mask = nvkm_top_intr_mask(device, type, inst); + for (map = mc->func->intr; !mask && map->stat; map++) { + if (map->type == type && map->inst == inst) + mask = map->stat; + } + mc->func->intr_mask(mc, mask, en ? mask : 0); + } +} + +void +nvkm_mc_intr_unarm(struct nvkm_device *device) +{ + struct nvkm_mc *mc = device->mc; + if (likely(mc)) + mc->func->intr_unarm(mc); +} + +void +nvkm_mc_intr_rearm(struct nvkm_device *device) +{ + struct nvkm_mc *mc = device->mc; + if (likely(mc)) + mc->func->intr_rearm(mc); +} + +static u32 +nvkm_mc_intr_stat(struct nvkm_mc *mc) +{ + u32 intr = mc->func->intr_stat(mc); + if (WARN_ON_ONCE(intr == 0xffffffff)) + intr = 0; /* likely fallen off the bus */ + return intr; +} + +void +nvkm_mc_intr(struct nvkm_device *device, bool *handled) +{ + struct nvkm_mc *mc = device->mc; + struct nvkm_top *top = device->top; + struct nvkm_top_device *tdev; + struct nvkm_subdev *subdev; + const struct nvkm_mc_map *map; + u32 stat, intr; + + if (unlikely(!mc)) + return; + + stat = intr = nvkm_mc_intr_stat(mc); + + if (top) { + list_for_each_entry(tdev, &top->device, head) { + if (tdev->intr >= 0 && (stat & BIT(tdev->intr))) { + subdev = nvkm_device_subdev(device, tdev->type, tdev->inst); + if (subdev) { + nvkm_subdev_intr(subdev); + stat &= ~BIT(tdev->intr); + if (!stat) + break; + } + } + } + } + + for (map = mc->func->intr; map->stat; map++) { + if (intr & map->stat) { + subdev = nvkm_device_subdev(device, map->type, map->inst); + if (subdev) + nvkm_subdev_intr(subdev); + stat &= ~map->stat; + } + } + + if (stat) + nvkm_error(&mc->subdev, "intr %08x\n", stat); + *handled = intr != 0; +} + +static u32 +nvkm_mc_reset_mask(struct nvkm_device *device, bool isauto, enum nvkm_subdev_type type, int inst) +{ + struct nvkm_mc *mc = device->mc; + const struct nvkm_mc_map *map; + u64 pmc_enable = 0; + if (likely(mc)) { + if (!(pmc_enable = nvkm_top_reset(device, type, inst))) { + for (map = mc->func->reset; map && map->stat; map++) { + if (!isauto || !map->noauto) { + if (map->type == type && map->inst == inst) { + pmc_enable = map->stat; + break; + } + } + } + } + } + return pmc_enable; +} + +void +nvkm_mc_reset(struct nvkm_device *device, enum nvkm_subdev_type type, int inst) +{ + u64 pmc_enable = nvkm_mc_reset_mask(device, true, type, inst); + if (pmc_enable) { + nvkm_mask(device, 0x000200, pmc_enable, 0x00000000); + nvkm_mask(device, 0x000200, pmc_enable, pmc_enable); + nvkm_rd32(device, 0x000200); + } +} + +void +nvkm_mc_disable(struct nvkm_device *device, enum nvkm_subdev_type type, int inst) +{ + u64 pmc_enable = nvkm_mc_reset_mask(device, false, type, inst); + if (pmc_enable) + nvkm_mask(device, 0x000200, pmc_enable, 0x00000000); +} + +void +nvkm_mc_enable(struct nvkm_device *device, enum nvkm_subdev_type type, int inst) +{ + u64 pmc_enable = nvkm_mc_reset_mask(device, false, type, inst); + if (pmc_enable) { + nvkm_mask(device, 0x000200, pmc_enable, pmc_enable); + nvkm_rd32(device, 0x000200); + } +} + +bool +nvkm_mc_enabled(struct nvkm_device *device, enum nvkm_subdev_type type, int inst) +{ + u64 pmc_enable = nvkm_mc_reset_mask(device, false, type, inst); + + return (pmc_enable != 0) && + ((nvkm_rd32(device, 0x000200) & pmc_enable) == pmc_enable); +} + + +static int +nvkm_mc_fini(struct nvkm_subdev *subdev, bool suspend) +{ + nvkm_mc_intr_unarm(subdev->device); + return 0; +} + +static int +nvkm_mc_init(struct nvkm_subdev *subdev) +{ + struct nvkm_mc *mc = nvkm_mc(subdev); + if (mc->func->init) + mc->func->init(mc); + nvkm_mc_intr_rearm(subdev->device); + return 0; +} + +static void * +nvkm_mc_dtor(struct nvkm_subdev *subdev) +{ + return nvkm_mc(subdev); +} + +static const struct nvkm_subdev_func +nvkm_mc = { + .dtor = nvkm_mc_dtor, + .init = nvkm_mc_init, + .fini = nvkm_mc_fini, +}; + +void +nvkm_mc_ctor(const struct nvkm_mc_func *func, struct nvkm_device *device, + enum nvkm_subdev_type type, int inst, struct nvkm_mc *mc) +{ + nvkm_subdev_ctor(&nvkm_mc, device, type, inst, &mc->subdev); + mc->func = func; +} + +int +nvkm_mc_new_(const struct nvkm_mc_func *func, struct nvkm_device *device, + enum nvkm_subdev_type type, int inst, struct nvkm_mc **pmc) +{ + struct nvkm_mc *mc; + if (!(mc = *pmc = kzalloc(sizeof(*mc), GFP_KERNEL))) + return -ENOMEM; + nvkm_mc_ctor(func, device, type, inst, *pmc); + return 0; +} |