diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv50.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv50.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv50.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv50.c new file mode 100644 index 000000000000..b83550fa7f96 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv50.c @@ -0,0 +1,241 @@ +/* + * Copyright 2010 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 <subdev/mmu.h> +#include <subdev/bar.h> +#include <subdev/fb.h> +#include <subdev/timer.h> + +#include <core/engine.h> +#include <core/gpuobj.h> + +struct nv50_mmu_priv { + struct nvkm_mmu base; +}; + +static void +nv50_vm_map_pgt(struct nvkm_gpuobj *pgd, u32 pde, struct nvkm_gpuobj *pgt[2]) +{ + u64 phys = 0xdeadcafe00000000ULL; + u32 coverage = 0; + + if (pgt[0]) { + phys = 0x00000003 | pgt[0]->addr; /* present, 4KiB pages */ + coverage = (pgt[0]->size >> 3) << 12; + } else + if (pgt[1]) { + phys = 0x00000001 | pgt[1]->addr; /* present */ + coverage = (pgt[1]->size >> 3) << 16; + } + + if (phys & 1) { + if (coverage <= 32 * 1024 * 1024) + phys |= 0x60; + else if (coverage <= 64 * 1024 * 1024) + phys |= 0x40; + else if (coverage <= 128 * 1024 * 1024) + phys |= 0x20; + } + + nv_wo32(pgd, (pde * 8) + 0, lower_32_bits(phys)); + nv_wo32(pgd, (pde * 8) + 4, upper_32_bits(phys)); +} + +static inline u64 +vm_addr(struct nvkm_vma *vma, u64 phys, u32 memtype, u32 target) +{ + phys |= 1; /* present */ + phys |= (u64)memtype << 40; + phys |= target << 4; + if (vma->access & NV_MEM_ACCESS_SYS) + phys |= (1 << 6); + if (!(vma->access & NV_MEM_ACCESS_WO)) + phys |= (1 << 3); + return phys; +} + +static void +nv50_vm_map(struct nvkm_vma *vma, struct nvkm_gpuobj *pgt, + struct nvkm_mem *mem, u32 pte, u32 cnt, u64 phys, u64 delta) +{ + u32 comp = (mem->memtype & 0x180) >> 7; + u32 block, target; + int i; + + /* IGPs don't have real VRAM, re-target to stolen system memory */ + target = 0; + if (nvkm_fb(vma->vm->mmu)->ram->stolen) { + phys += nvkm_fb(vma->vm->mmu)->ram->stolen; + target = 3; + } + + phys = vm_addr(vma, phys, mem->memtype, target); + pte <<= 3; + cnt <<= 3; + + while (cnt) { + u32 offset_h = upper_32_bits(phys); + u32 offset_l = lower_32_bits(phys); + + for (i = 7; i >= 0; i--) { + block = 1 << (i + 3); + if (cnt >= block && !(pte & (block - 1))) + break; + } + offset_l |= (i << 7); + + phys += block << (vma->node->type - 3); + cnt -= block; + if (comp) { + u32 tag = mem->tag->offset + ((delta >> 16) * comp); + offset_h |= (tag << 17); + delta += block << (vma->node->type - 3); + } + + while (block) { + nv_wo32(pgt, pte + 0, offset_l); + nv_wo32(pgt, pte + 4, offset_h); + pte += 8; + block -= 8; + } + } +} + +static void +nv50_vm_map_sg(struct nvkm_vma *vma, struct nvkm_gpuobj *pgt, + struct nvkm_mem *mem, u32 pte, u32 cnt, dma_addr_t *list) +{ + u32 target = (vma->access & NV_MEM_ACCESS_NOSNOOP) ? 3 : 2; + pte <<= 3; + while (cnt--) { + u64 phys = vm_addr(vma, (u64)*list++, mem->memtype, target); + nv_wo32(pgt, pte + 0, lower_32_bits(phys)); + nv_wo32(pgt, pte + 4, upper_32_bits(phys)); + pte += 8; + } +} + +static void +nv50_vm_unmap(struct nvkm_gpuobj *pgt, u32 pte, u32 cnt) +{ + pte <<= 3; + while (cnt--) { + nv_wo32(pgt, pte + 0, 0x00000000); + nv_wo32(pgt, pte + 4, 0x00000000); + pte += 8; + } +} + +static void +nv50_vm_flush(struct nvkm_vm *vm) +{ + struct nv50_mmu_priv *priv = (void *)vm->mmu; + struct nvkm_bar *bar = nvkm_bar(priv); + struct nvkm_engine *engine; + int i, vme; + + bar->flush(bar); + + mutex_lock(&nv_subdev(priv)->mutex); + for (i = 0; i < NVDEV_SUBDEV_NR; i++) { + if (!atomic_read(&vm->engref[i])) + continue; + + /* unfortunate hw bug workaround... */ + engine = nvkm_engine(priv, i); + if (engine && engine->tlb_flush) { + engine->tlb_flush(engine); + continue; + } + + switch (i) { + case NVDEV_ENGINE_GR : vme = 0x00; break; + case NVDEV_ENGINE_VP : + case NVDEV_ENGINE_MSPDEC: vme = 0x01; break; + case NVDEV_SUBDEV_BAR : vme = 0x06; break; + case NVDEV_ENGINE_MSPPP : + case NVDEV_ENGINE_MPEG : vme = 0x08; break; + case NVDEV_ENGINE_BSP : + case NVDEV_ENGINE_MSVLD : vme = 0x09; break; + case NVDEV_ENGINE_CIPHER: + case NVDEV_ENGINE_SEC : vme = 0x0a; break; + case NVDEV_ENGINE_CE0 : vme = 0x0d; break; + default: + continue; + } + + nv_wr32(priv, 0x100c80, (vme << 16) | 1); + if (!nv_wait(priv, 0x100c80, 0x00000001, 0x00000000)) + nv_error(priv, "vm flush timeout: engine %d\n", vme); + } + mutex_unlock(&nv_subdev(priv)->mutex); +} + +static int +nv50_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length, + u64 mm_offset, struct nvkm_vm **pvm) +{ + u32 block = (1 << (mmu->pgt_bits + 12)); + if (block > length) + block = length; + + return nvkm_vm_create(mmu, offset, length, mm_offset, block, pvm); +} + +static int +nv50_mmu_ctor(struct nvkm_object *parent, struct nvkm_object *engine, + struct nvkm_oclass *oclass, void *data, u32 size, + struct nvkm_object **pobject) +{ + struct nv50_mmu_priv *priv; + int ret; + + ret = nvkm_mmu_create(parent, engine, oclass, "VM", "vm", &priv); + *pobject = nv_object(priv); + if (ret) + return ret; + + priv->base.limit = 1ULL << 40; + priv->base.dma_bits = 40; + priv->base.pgt_bits = 29 - 12; + priv->base.spg_shift = 12; + priv->base.lpg_shift = 16; + priv->base.create = nv50_vm_create; + priv->base.map_pgt = nv50_vm_map_pgt; + priv->base.map = nv50_vm_map; + priv->base.map_sg = nv50_vm_map_sg; + priv->base.unmap = nv50_vm_unmap; + priv->base.flush = nv50_vm_flush; + return 0; +} + +struct nvkm_oclass +nv50_mmu_oclass = { + .handle = NV_SUBDEV(MMU, 0x50), + .ofuncs = &(struct nvkm_ofuncs) { + .ctor = nv50_mmu_ctor, + .dtor = _nvkm_mmu_dtor, + .init = _nvkm_mmu_init, + .fini = _nvkm_mmu_fini, + }, +}; |