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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c')
-rw-r--r-- | kernel/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c | 480 |
1 files changed, 480 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c new file mode 100644 index 000000000..277b6ec04 --- /dev/null +++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c @@ -0,0 +1,480 @@ +/* + * 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/fb.h> + +#include <core/gpuobj.h> + +void +nvkm_vm_map_at(struct nvkm_vma *vma, u64 delta, struct nvkm_mem *node) +{ + struct nvkm_vm *vm = vma->vm; + struct nvkm_mmu *mmu = vm->mmu; + struct nvkm_mm_node *r; + int big = vma->node->type != mmu->spg_shift; + u32 offset = vma->node->offset + (delta >> 12); + u32 bits = vma->node->type - 12; + u32 pde = (offset >> mmu->pgt_bits) - vm->fpde; + u32 pte = (offset & ((1 << mmu->pgt_bits) - 1)) >> bits; + u32 max = 1 << (mmu->pgt_bits - bits); + u32 end, len; + + delta = 0; + list_for_each_entry(r, &node->regions, rl_entry) { + u64 phys = (u64)r->offset << 12; + u32 num = r->length >> bits; + + while (num) { + struct nvkm_gpuobj *pgt = vm->pgt[pde].obj[big]; + + end = (pte + num); + if (unlikely(end >= max)) + end = max; + len = end - pte; + + mmu->map(vma, pgt, node, pte, len, phys, delta); + + num -= len; + pte += len; + if (unlikely(end >= max)) { + phys += len << (bits + 12); + pde++; + pte = 0; + } + + delta += (u64)len << vma->node->type; + } + } + + mmu->flush(vm); +} + +static void +nvkm_vm_map_sg_table(struct nvkm_vma *vma, u64 delta, u64 length, + struct nvkm_mem *mem) +{ + struct nvkm_vm *vm = vma->vm; + struct nvkm_mmu *mmu = vm->mmu; + int big = vma->node->type != mmu->spg_shift; + u32 offset = vma->node->offset + (delta >> 12); + u32 bits = vma->node->type - 12; + u32 num = length >> vma->node->type; + u32 pde = (offset >> mmu->pgt_bits) - vm->fpde; + u32 pte = (offset & ((1 << mmu->pgt_bits) - 1)) >> bits; + u32 max = 1 << (mmu->pgt_bits - bits); + unsigned m, sglen; + u32 end, len; + int i; + struct scatterlist *sg; + + for_each_sg(mem->sg->sgl, sg, mem->sg->nents, i) { + struct nvkm_gpuobj *pgt = vm->pgt[pde].obj[big]; + sglen = sg_dma_len(sg) >> PAGE_SHIFT; + + end = pte + sglen; + if (unlikely(end >= max)) + end = max; + len = end - pte; + + for (m = 0; m < len; m++) { + dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); + + mmu->map_sg(vma, pgt, mem, pte, 1, &addr); + num--; + pte++; + + if (num == 0) + goto finish; + } + if (unlikely(end >= max)) { + pde++; + pte = 0; + } + if (m < sglen) { + for (; m < sglen; m++) { + dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); + + mmu->map_sg(vma, pgt, mem, pte, 1, &addr); + num--; + pte++; + if (num == 0) + goto finish; + } + } + + } +finish: + mmu->flush(vm); +} + +static void +nvkm_vm_map_sg(struct nvkm_vma *vma, u64 delta, u64 length, + struct nvkm_mem *mem) +{ + struct nvkm_vm *vm = vma->vm; + struct nvkm_mmu *mmu = vm->mmu; + dma_addr_t *list = mem->pages; + int big = vma->node->type != mmu->spg_shift; + u32 offset = vma->node->offset + (delta >> 12); + u32 bits = vma->node->type - 12; + u32 num = length >> vma->node->type; + u32 pde = (offset >> mmu->pgt_bits) - vm->fpde; + u32 pte = (offset & ((1 << mmu->pgt_bits) - 1)) >> bits; + u32 max = 1 << (mmu->pgt_bits - bits); + u32 end, len; + + while (num) { + struct nvkm_gpuobj *pgt = vm->pgt[pde].obj[big]; + + end = (pte + num); + if (unlikely(end >= max)) + end = max; + len = end - pte; + + mmu->map_sg(vma, pgt, mem, pte, len, list); + + num -= len; + pte += len; + list += len; + if (unlikely(end >= max)) { + pde++; + pte = 0; + } + } + + mmu->flush(vm); +} + +void +nvkm_vm_map(struct nvkm_vma *vma, struct nvkm_mem *node) +{ + if (node->sg) + nvkm_vm_map_sg_table(vma, 0, node->size << 12, node); + else + if (node->pages) + nvkm_vm_map_sg(vma, 0, node->size << 12, node); + else + nvkm_vm_map_at(vma, 0, node); +} + +void +nvkm_vm_unmap_at(struct nvkm_vma *vma, u64 delta, u64 length) +{ + struct nvkm_vm *vm = vma->vm; + struct nvkm_mmu *mmu = vm->mmu; + int big = vma->node->type != mmu->spg_shift; + u32 offset = vma->node->offset + (delta >> 12); + u32 bits = vma->node->type - 12; + u32 num = length >> vma->node->type; + u32 pde = (offset >> mmu->pgt_bits) - vm->fpde; + u32 pte = (offset & ((1 << mmu->pgt_bits) - 1)) >> bits; + u32 max = 1 << (mmu->pgt_bits - bits); + u32 end, len; + + while (num) { + struct nvkm_gpuobj *pgt = vm->pgt[pde].obj[big]; + + end = (pte + num); + if (unlikely(end >= max)) + end = max; + len = end - pte; + + mmu->unmap(pgt, pte, len); + + num -= len; + pte += len; + if (unlikely(end >= max)) { + pde++; + pte = 0; + } + } + + mmu->flush(vm); +} + +void +nvkm_vm_unmap(struct nvkm_vma *vma) +{ + nvkm_vm_unmap_at(vma, 0, (u64)vma->node->length << 12); +} + +static void +nvkm_vm_unmap_pgt(struct nvkm_vm *vm, int big, u32 fpde, u32 lpde) +{ + struct nvkm_mmu *mmu = vm->mmu; + struct nvkm_vm_pgd *vpgd; + struct nvkm_vm_pgt *vpgt; + struct nvkm_gpuobj *pgt; + u32 pde; + + for (pde = fpde; pde <= lpde; pde++) { + vpgt = &vm->pgt[pde - vm->fpde]; + if (--vpgt->refcount[big]) + continue; + + pgt = vpgt->obj[big]; + vpgt->obj[big] = NULL; + + list_for_each_entry(vpgd, &vm->pgd_list, head) { + mmu->map_pgt(vpgd->obj, pde, vpgt->obj); + } + + mutex_unlock(&nv_subdev(mmu)->mutex); + nvkm_gpuobj_ref(NULL, &pgt); + mutex_lock(&nv_subdev(mmu)->mutex); + } +} + +static int +nvkm_vm_map_pgt(struct nvkm_vm *vm, u32 pde, u32 type) +{ + struct nvkm_mmu *mmu = vm->mmu; + struct nvkm_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; + struct nvkm_vm_pgd *vpgd; + struct nvkm_gpuobj *pgt; + int big = (type != mmu->spg_shift); + u32 pgt_size; + int ret; + + pgt_size = (1 << (mmu->pgt_bits + 12)) >> type; + pgt_size *= 8; + + mutex_unlock(&nv_subdev(mmu)->mutex); + ret = nvkm_gpuobj_new(nv_object(vm->mmu), NULL, pgt_size, 0x1000, + NVOBJ_FLAG_ZERO_ALLOC, &pgt); + mutex_lock(&nv_subdev(mmu)->mutex); + if (unlikely(ret)) + return ret; + + /* someone beat us to filling the PDE while we didn't have the lock */ + if (unlikely(vpgt->refcount[big]++)) { + mutex_unlock(&nv_subdev(mmu)->mutex); + nvkm_gpuobj_ref(NULL, &pgt); + mutex_lock(&nv_subdev(mmu)->mutex); + return 0; + } + + vpgt->obj[big] = pgt; + list_for_each_entry(vpgd, &vm->pgd_list, head) { + mmu->map_pgt(vpgd->obj, pde, vpgt->obj); + } + + return 0; +} + +int +nvkm_vm_get(struct nvkm_vm *vm, u64 size, u32 page_shift, u32 access, + struct nvkm_vma *vma) +{ + struct nvkm_mmu *mmu = vm->mmu; + u32 align = (1 << page_shift) >> 12; + u32 msize = size >> 12; + u32 fpde, lpde, pde; + int ret; + + mutex_lock(&nv_subdev(mmu)->mutex); + ret = nvkm_mm_head(&vm->mm, 0, page_shift, msize, msize, align, + &vma->node); + if (unlikely(ret != 0)) { + mutex_unlock(&nv_subdev(mmu)->mutex); + return ret; + } + + fpde = (vma->node->offset >> mmu->pgt_bits); + lpde = (vma->node->offset + vma->node->length - 1) >> mmu->pgt_bits; + + for (pde = fpde; pde <= lpde; pde++) { + struct nvkm_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; + int big = (vma->node->type != mmu->spg_shift); + + if (likely(vpgt->refcount[big])) { + vpgt->refcount[big]++; + continue; + } + + ret = nvkm_vm_map_pgt(vm, pde, vma->node->type); + if (ret) { + if (pde != fpde) + nvkm_vm_unmap_pgt(vm, big, fpde, pde - 1); + nvkm_mm_free(&vm->mm, &vma->node); + mutex_unlock(&nv_subdev(mmu)->mutex); + return ret; + } + } + mutex_unlock(&nv_subdev(mmu)->mutex); + + vma->vm = NULL; + nvkm_vm_ref(vm, &vma->vm, NULL); + vma->offset = (u64)vma->node->offset << 12; + vma->access = access; + return 0; +} + +void +nvkm_vm_put(struct nvkm_vma *vma) +{ + struct nvkm_vm *vm = vma->vm; + struct nvkm_mmu *mmu = vm->mmu; + u32 fpde, lpde; + + if (unlikely(vma->node == NULL)) + return; + fpde = (vma->node->offset >> mmu->pgt_bits); + lpde = (vma->node->offset + vma->node->length - 1) >> mmu->pgt_bits; + + mutex_lock(&nv_subdev(mmu)->mutex); + nvkm_vm_unmap_pgt(vm, vma->node->type != mmu->spg_shift, fpde, lpde); + nvkm_mm_free(&vm->mm, &vma->node); + mutex_unlock(&nv_subdev(mmu)->mutex); + + nvkm_vm_ref(NULL, &vma->vm, NULL); +} + +int +nvkm_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length, u64 mm_offset, + u32 block, struct nvkm_vm **pvm) +{ + struct nvkm_vm *vm; + u64 mm_length = (offset + length) - mm_offset; + int ret; + + vm = kzalloc(sizeof(*vm), GFP_KERNEL); + if (!vm) + return -ENOMEM; + + INIT_LIST_HEAD(&vm->pgd_list); + vm->mmu = mmu; + kref_init(&vm->refcount); + vm->fpde = offset >> (mmu->pgt_bits + 12); + vm->lpde = (offset + length - 1) >> (mmu->pgt_bits + 12); + + vm->pgt = vzalloc((vm->lpde - vm->fpde + 1) * sizeof(*vm->pgt)); + if (!vm->pgt) { + kfree(vm); + return -ENOMEM; + } + + ret = nvkm_mm_init(&vm->mm, mm_offset >> 12, mm_length >> 12, + block >> 12); + if (ret) { + vfree(vm->pgt); + kfree(vm); + return ret; + } + + *pvm = vm; + + return 0; +} + +int +nvkm_vm_new(struct nvkm_device *device, u64 offset, u64 length, u64 mm_offset, + struct nvkm_vm **pvm) +{ + struct nvkm_mmu *mmu = nvkm_mmu(device); + return mmu->create(mmu, offset, length, mm_offset, pvm); +} + +static int +nvkm_vm_link(struct nvkm_vm *vm, struct nvkm_gpuobj *pgd) +{ + struct nvkm_mmu *mmu = vm->mmu; + struct nvkm_vm_pgd *vpgd; + int i; + + if (!pgd) + return 0; + + vpgd = kzalloc(sizeof(*vpgd), GFP_KERNEL); + if (!vpgd) + return -ENOMEM; + + nvkm_gpuobj_ref(pgd, &vpgd->obj); + + mutex_lock(&nv_subdev(mmu)->mutex); + for (i = vm->fpde; i <= vm->lpde; i++) + mmu->map_pgt(pgd, i, vm->pgt[i - vm->fpde].obj); + list_add(&vpgd->head, &vm->pgd_list); + mutex_unlock(&nv_subdev(mmu)->mutex); + return 0; +} + +static void +nvkm_vm_unlink(struct nvkm_vm *vm, struct nvkm_gpuobj *mpgd) +{ + struct nvkm_mmu *mmu = vm->mmu; + struct nvkm_vm_pgd *vpgd, *tmp; + struct nvkm_gpuobj *pgd = NULL; + + if (!mpgd) + return; + + mutex_lock(&nv_subdev(mmu)->mutex); + list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { + if (vpgd->obj == mpgd) { + pgd = vpgd->obj; + list_del(&vpgd->head); + kfree(vpgd); + break; + } + } + mutex_unlock(&nv_subdev(mmu)->mutex); + + nvkm_gpuobj_ref(NULL, &pgd); +} + +static void +nvkm_vm_del(struct kref *kref) +{ + struct nvkm_vm *vm = container_of(kref, typeof(*vm), refcount); + struct nvkm_vm_pgd *vpgd, *tmp; + + list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { + nvkm_vm_unlink(vm, vpgd->obj); + } + + nvkm_mm_fini(&vm->mm); + vfree(vm->pgt); + kfree(vm); +} + +int +nvkm_vm_ref(struct nvkm_vm *ref, struct nvkm_vm **ptr, struct nvkm_gpuobj *pgd) +{ + if (ref) { + int ret = nvkm_vm_link(ref, pgd); + if (ret) + return ret; + + kref_get(&ref->refcount); + } + + if (*ptr) { + nvkm_vm_unlink(*ptr, pgd); + kref_put(&(*ptr)->refcount, nvkm_vm_del); + } + + *ptr = ref; + return 0; +} |