diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv04.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv04.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv04.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv04.c new file mode 100644 index 000000000000..fe93ea2711c9 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv04.c @@ -0,0 +1,151 @@ +/* + * 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 "nv04.h" + +#include <core/device.h> +#include <core/gpuobj.h> + +#define NV04_PDMA_SIZE (128 * 1024 * 1024) +#define NV04_PDMA_PAGE ( 4 * 1024) + +/******************************************************************************* + * VM map/unmap callbacks + ******************************************************************************/ + +static void +nv04_vm_map_sg(struct nvkm_vma *vma, struct nvkm_gpuobj *pgt, + struct nvkm_mem *mem, u32 pte, u32 cnt, dma_addr_t *list) +{ + pte = 0x00008 + (pte * 4); + while (cnt) { + u32 page = PAGE_SIZE / NV04_PDMA_PAGE; + u32 phys = (u32)*list++; + while (cnt && page--) { + nv_wo32(pgt, pte, phys | 3); + phys += NV04_PDMA_PAGE; + pte += 4; + cnt -= 1; + } + } +} + +static void +nv04_vm_unmap(struct nvkm_gpuobj *pgt, u32 pte, u32 cnt) +{ + pte = 0x00008 + (pte * 4); + while (cnt--) { + nv_wo32(pgt, pte, 0x00000000); + pte += 4; + } +} + +static void +nv04_vm_flush(struct nvkm_vm *vm) +{ +} + +/******************************************************************************* + * VM object + ******************************************************************************/ + +int +nv04_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length, u64 mmstart, + struct nvkm_vm **pvm) +{ + return -EINVAL; +} + +/******************************************************************************* + * MMU subdev + ******************************************************************************/ + +static int +nv04_mmu_ctor(struct nvkm_object *parent, struct nvkm_object *engine, + struct nvkm_oclass *oclass, void *data, u32 size, + struct nvkm_object **pobject) +{ + struct nv04_mmu_priv *priv; + struct nvkm_gpuobj *dma; + int ret; + + ret = nvkm_mmu_create(parent, engine, oclass, "PCIGART", + "pcigart", &priv); + *pobject = nv_object(priv); + if (ret) + return ret; + + priv->base.create = nv04_vm_create; + priv->base.limit = NV04_PDMA_SIZE; + priv->base.dma_bits = 32; + priv->base.pgt_bits = 32 - 12; + priv->base.spg_shift = 12; + priv->base.lpg_shift = 12; + priv->base.map_sg = nv04_vm_map_sg; + priv->base.unmap = nv04_vm_unmap; + priv->base.flush = nv04_vm_flush; + + ret = nvkm_vm_create(&priv->base, 0, NV04_PDMA_SIZE, 0, 4096, + &priv->vm); + if (ret) + return ret; + + ret = nvkm_gpuobj_new(nv_object(priv), NULL, + (NV04_PDMA_SIZE / NV04_PDMA_PAGE) * 4 + 8, + 16, NVOBJ_FLAG_ZERO_ALLOC, + &priv->vm->pgt[0].obj[0]); + dma = priv->vm->pgt[0].obj[0]; + priv->vm->pgt[0].refcount[0] = 1; + if (ret) + return ret; + + nv_wo32(dma, 0x00000, 0x0002103d); /* PCI, RW, PT, !LN */ + nv_wo32(dma, 0x00004, NV04_PDMA_SIZE - 1); + return 0; +} + +void +nv04_mmu_dtor(struct nvkm_object *object) +{ + struct nv04_mmu_priv *priv = (void *)object; + if (priv->vm) { + nvkm_gpuobj_ref(NULL, &priv->vm->pgt[0].obj[0]); + nvkm_vm_ref(NULL, &priv->vm, NULL); + } + if (priv->nullp) { + pci_free_consistent(nv_device(priv)->pdev, 16 * 1024, + priv->nullp, priv->null); + } + nvkm_mmu_destroy(&priv->base); +} + +struct nvkm_oclass +nv04_mmu_oclass = { + .handle = NV_SUBDEV(MMU, 0x04), + .ofuncs = &(struct nvkm_ofuncs) { + .ctor = nv04_mmu_ctor, + .dtor = nv04_mmu_dtor, + .init = _nvkm_mmu_init, + .fini = _nvkm_mmu_fini, + }, +}; |