diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_vm.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_vm.c | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_vm.c b/drivers/gpu/drm/nouveau/nouveau_vm.c new file mode 100644 index 0000000..97d82ae --- /dev/null +++ b/drivers/gpu/drm/nouveau/nouveau_vm.c @@ -0,0 +1,439 @@ +/* + * 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 "drmP.h" +#include "nouveau_drv.h" +#include "nouveau_mm.h" +#include "nouveau_vm.h" + +void +nouveau_vm_map_at(struct nouveau_vma *vma, u64 delta, struct nouveau_vram *vram) +{ + struct nouveau_vm *vm = vma->vm; + struct nouveau_mm_node *r; + int big = vma->node->type != vm->spg_shift; + u32 offset = vma->node->offset + (delta >> 12); + u32 bits = vma->node->type - 12; + u32 pde = (offset >> vm->pgt_bits) - vm->fpde; + u32 pte = (offset & ((1 << vm->pgt_bits) - 1)) >> bits; + u32 max = 1 << (vm->pgt_bits - bits); + u32 end, len; + + list_for_each_entry(r, &vram->regions, rl_entry) { + u64 phys = (u64)r->offset << 12; + u32 num = r->length >> bits; + + while (num) { + struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big]; + + end = (pte + num); + if (unlikely(end >= max)) + end = max; + len = end - pte; + + vm->map(vma, pgt, vram, pte, len, phys); + + num -= len; + pte += len; + if (unlikely(end >= max)) { + pde++; + pte = 0; + } + } + } + + vm->flush(vm); +} + +void +nouveau_vm_map(struct nouveau_vma *vma, struct nouveau_vram *vram) +{ + nouveau_vm_map_at(vma, 0, vram); +} + +void +nouveau_vm_map_sg(struct nouveau_vma *vma, u64 delta, u64 length, + dma_addr_t *list) +{ + struct nouveau_vm *vm = vma->vm; + int big = vma->node->type != vm->spg_shift; + u32 offset = vma->node->offset + (delta >> 12); + u32 bits = vma->node->type - 12; + u32 num = length >> vma->node->type; + u32 pde = (offset >> vm->pgt_bits) - vm->fpde; + u32 pte = (offset & ((1 << vm->pgt_bits) - 1)) >> bits; + u32 max = 1 << (vm->pgt_bits - bits); + u32 end, len; + + while (num) { + struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big]; + + end = (pte + num); + if (unlikely(end >= max)) + end = max; + len = end - pte; + + vm->map_sg(vma, pgt, pte, list, len); + + num -= len; + pte += len; + list += len; + if (unlikely(end >= max)) { + pde++; + pte = 0; + } + } + + vm->flush(vm); +} + +void +nouveau_vm_unmap_at(struct nouveau_vma *vma, u64 delta, u64 length) +{ + struct nouveau_vm *vm = vma->vm; + int big = vma->node->type != vm->spg_shift; + u32 offset = vma->node->offset + (delta >> 12); + u32 bits = vma->node->type - 12; + u32 num = length >> vma->node->type; + u32 pde = (offset >> vm->pgt_bits) - vm->fpde; + u32 pte = (offset & ((1 << vm->pgt_bits) - 1)) >> bits; + u32 max = 1 << (vm->pgt_bits - bits); + u32 end, len; + + while (num) { + struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big]; + + end = (pte + num); + if (unlikely(end >= max)) + end = max; + len = end - pte; + + vm->unmap(pgt, pte, len); + + num -= len; + pte += len; + if (unlikely(end >= max)) { + pde++; + pte = 0; + } + } + + vm->flush(vm); +} + +void +nouveau_vm_unmap(struct nouveau_vma *vma) +{ + nouveau_vm_unmap_at(vma, 0, (u64)vma->node->length << 12); +} + +static void +nouveau_vm_unmap_pgt(struct nouveau_vm *vm, int big, u32 fpde, u32 lpde) +{ + struct nouveau_vm_pgd *vpgd; + struct nouveau_vm_pgt *vpgt; + struct nouveau_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) { + vm->map_pgt(vpgd->obj, pde, vpgt->obj); + } + + mutex_unlock(&vm->mm->mutex); + nouveau_gpuobj_ref(NULL, &pgt); + mutex_lock(&vm->mm->mutex); + } +} + +static int +nouveau_vm_map_pgt(struct nouveau_vm *vm, u32 pde, u32 type) +{ + struct nouveau_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; + struct nouveau_vm_pgd *vpgd; + struct nouveau_gpuobj *pgt; + int big = (type != vm->spg_shift); + u32 pgt_size; + int ret; + + pgt_size = (1 << (vm->pgt_bits + 12)) >> type; + pgt_size *= 8; + + mutex_unlock(&vm->mm->mutex); + ret = nouveau_gpuobj_new(vm->dev, NULL, pgt_size, 0x1000, + NVOBJ_FLAG_ZERO_ALLOC, &pgt); + mutex_lock(&vm->mm->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(&vm->mm->mutex); + nouveau_gpuobj_ref(NULL, &pgt); + mutex_lock(&vm->mm->mutex); + return 0; + } + + vpgt->obj[big] = pgt; + list_for_each_entry(vpgd, &vm->pgd_list, head) { + vm->map_pgt(vpgd->obj, pde, vpgt->obj); + } + + return 0; +} + +int +nouveau_vm_get(struct nouveau_vm *vm, u64 size, u32 page_shift, + u32 access, struct nouveau_vma *vma) +{ + u32 align = (1 << page_shift) >> 12; + u32 msize = size >> 12; + u32 fpde, lpde, pde; + int ret; + + mutex_lock(&vm->mm->mutex); + ret = nouveau_mm_get(vm->mm, page_shift, msize, 0, align, &vma->node); + if (unlikely(ret != 0)) { + mutex_unlock(&vm->mm->mutex); + return ret; + } + + fpde = (vma->node->offset >> vm->pgt_bits); + lpde = (vma->node->offset + vma->node->length - 1) >> vm->pgt_bits; + for (pde = fpde; pde <= lpde; pde++) { + struct nouveau_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; + int big = (vma->node->type != vm->spg_shift); + + if (likely(vpgt->refcount[big])) { + vpgt->refcount[big]++; + continue; + } + + ret = nouveau_vm_map_pgt(vm, pde, vma->node->type); + if (ret) { + if (pde != fpde) + nouveau_vm_unmap_pgt(vm, big, fpde, pde - 1); + nouveau_mm_put(vm->mm, vma->node); + mutex_unlock(&vm->mm->mutex); + vma->node = NULL; + return ret; + } + } + mutex_unlock(&vm->mm->mutex); + + vma->vm = vm; + vma->offset = (u64)vma->node->offset << 12; + vma->access = access; + return 0; +} + +void +nouveau_vm_put(struct nouveau_vma *vma) +{ + struct nouveau_vm *vm = vma->vm; + u32 fpde, lpde; + + if (unlikely(vma->node == NULL)) + return; + fpde = (vma->node->offset >> vm->pgt_bits); + lpde = (vma->node->offset + vma->node->length - 1) >> vm->pgt_bits; + + mutex_lock(&vm->mm->mutex); + nouveau_vm_unmap_pgt(vm, vma->node->type != vm->spg_shift, fpde, lpde); + nouveau_mm_put(vm->mm, vma->node); + vma->node = NULL; + mutex_unlock(&vm->mm->mutex); +} + +int +nouveau_vm_new(struct drm_device *dev, u64 offset, u64 length, u64 mm_offset, + struct nouveau_vm **pvm) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_vm *vm; + u64 mm_length = (offset + length) - mm_offset; + u32 block, pgt_bits; + int ret; + + vm = kzalloc(sizeof(*vm), GFP_KERNEL); + if (!vm) + return -ENOMEM; + + if (dev_priv->card_type == NV_50) { + vm->map_pgt = nv50_vm_map_pgt; + vm->map = nv50_vm_map; + vm->map_sg = nv50_vm_map_sg; + vm->unmap = nv50_vm_unmap; + vm->flush = nv50_vm_flush; + vm->spg_shift = 12; + vm->lpg_shift = 16; + + pgt_bits = 29; + block = (1 << pgt_bits); + if (length < block) + block = length; + + } else + if (dev_priv->card_type == NV_C0) { + vm->map_pgt = nvc0_vm_map_pgt; + vm->map = nvc0_vm_map; + vm->map_sg = nvc0_vm_map_sg; + vm->unmap = nvc0_vm_unmap; + vm->flush = nvc0_vm_flush; + vm->spg_shift = 12; + vm->lpg_shift = 17; + pgt_bits = 27; + + /* Should be 4096 everywhere, this is a hack that's + * currently necessary to avoid an elusive bug that + * causes corruption when mixing small/large pages + */ + if (length < (1ULL << 40)) + block = 4096; + else { + block = (1 << pgt_bits); + if (length < block) + block = length; + } + } else { + kfree(vm); + return -ENOSYS; + } + + vm->fpde = offset >> pgt_bits; + vm->lpde = (offset + length - 1) >> pgt_bits; + vm->pgt = kcalloc(vm->lpde - vm->fpde + 1, sizeof(*vm->pgt), GFP_KERNEL); + if (!vm->pgt) { + kfree(vm); + return -ENOMEM; + } + + INIT_LIST_HEAD(&vm->pgd_list); + vm->dev = dev; + vm->refcount = 1; + vm->pgt_bits = pgt_bits - 12; + + ret = nouveau_mm_init(&vm->mm, mm_offset >> 12, mm_length >> 12, + block >> 12); + if (ret) { + kfree(vm); + return ret; + } + + *pvm = vm; + return 0; +} + +static int +nouveau_vm_link(struct nouveau_vm *vm, struct nouveau_gpuobj *pgd) +{ + struct nouveau_vm_pgd *vpgd; + int i; + + if (!pgd) + return 0; + + vpgd = kzalloc(sizeof(*vpgd), GFP_KERNEL); + if (!vpgd) + return -ENOMEM; + + nouveau_gpuobj_ref(pgd, &vpgd->obj); + + mutex_lock(&vm->mm->mutex); + for (i = vm->fpde; i <= vm->lpde; i++) + vm->map_pgt(pgd, i, vm->pgt[i - vm->fpde].obj); + list_add(&vpgd->head, &vm->pgd_list); + mutex_unlock(&vm->mm->mutex); + return 0; +} + +static void +nouveau_vm_unlink(struct nouveau_vm *vm, struct nouveau_gpuobj *pgd) +{ + struct nouveau_vm_pgd *vpgd, *tmp; + + if (!pgd) + return; + + mutex_lock(&vm->mm->mutex); + list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { + if (vpgd->obj != pgd) + continue; + + list_del(&vpgd->head); + nouveau_gpuobj_ref(NULL, &vpgd->obj); + kfree(vpgd); + } + mutex_unlock(&vm->mm->mutex); +} + +static void +nouveau_vm_del(struct nouveau_vm *vm) +{ + struct nouveau_vm_pgd *vpgd, *tmp; + + list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { + nouveau_vm_unlink(vm, vpgd->obj); + } + WARN_ON(nouveau_mm_fini(&vm->mm) != 0); + + kfree(vm->pgt); + kfree(vm); +} + +int +nouveau_vm_ref(struct nouveau_vm *ref, struct nouveau_vm **ptr, + struct nouveau_gpuobj *pgd) +{ + struct nouveau_vm *vm; + int ret; + + vm = ref; + if (vm) { + ret = nouveau_vm_link(vm, pgd); + if (ret) + return ret; + + vm->refcount++; + } + + vm = *ptr; + *ptr = ref; + + if (vm) { + nouveau_vm_unlink(vm, pgd); + + if (--vm->refcount == 0) + nouveau_vm_del(vm); + } + + return 0; +} |