| /* |
| * 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 <core/gpuobj.h> |
| #include <core/mm.h> |
| |
| #include <subdev/fb.h> |
| #include <subdev/vm.h> |
| |
| void |
| nouveau_vm_map_at(struct nouveau_vma *vma, u64 delta, struct nouveau_mem *node) |
| { |
| struct nouveau_vm *vm = vma->vm; |
| struct nouveau_vmmgr *vmm = vm->vmm; |
| struct nouveau_mm_node *r; |
| int big = vma->node->type != vmm->spg_shift; |
| u32 offset = vma->node->offset + (delta >> 12); |
| u32 bits = vma->node->type - 12; |
| u32 pde = (offset >> vmm->pgt_bits) - vm->fpde; |
| u32 pte = (offset & ((1 << vmm->pgt_bits) - 1)) >> bits; |
| u32 max = 1 << (vmm->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 nouveau_gpuobj *pgt = vm->pgt[pde].obj[big]; |
| |
| end = (pte + num); |
| if (unlikely(end >= max)) |
| end = max; |
| len = end - pte; |
| |
| vmm->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; |
| } |
| } |
| |
| vmm->flush(vm); |
| } |
| |
| static void |
| nouveau_vm_map_sg_table(struct nouveau_vma *vma, u64 delta, u64 length, |
| struct nouveau_mem *mem) |
| { |
| struct nouveau_vm *vm = vma->vm; |
| struct nouveau_vmmgr *vmm = vm->vmm; |
| int big = vma->node->type != vmm->spg_shift; |
| u32 offset = vma->node->offset + (delta >> 12); |
| u32 bits = vma->node->type - 12; |
| u32 num = length >> vma->node->type; |
| u32 pde = (offset >> vmm->pgt_bits) - vm->fpde; |
| u32 pte = (offset & ((1 << vmm->pgt_bits) - 1)) >> bits; |
| u32 max = 1 << (vmm->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 nouveau_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); |
| |
| vmm->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); |
| |
| vmm->map_sg(vma, pgt, mem, pte, 1, &addr); |
| num--; |
| pte++; |
| if (num == 0) |
| goto finish; |
| } |
| } |
| |
| } |
| finish: |
| vmm->flush(vm); |
| } |
| |
| static void |
| nouveau_vm_map_sg(struct nouveau_vma *vma, u64 delta, u64 length, |
| struct nouveau_mem *mem) |
| { |
| struct nouveau_vm *vm = vma->vm; |
| struct nouveau_vmmgr *vmm = vm->vmm; |
| dma_addr_t *list = mem->pages; |
| int big = vma->node->type != vmm->spg_shift; |
| u32 offset = vma->node->offset + (delta >> 12); |
| u32 bits = vma->node->type - 12; |
| u32 num = length >> vma->node->type; |
| u32 pde = (offset >> vmm->pgt_bits) - vm->fpde; |
| u32 pte = (offset & ((1 << vmm->pgt_bits) - 1)) >> bits; |
| u32 max = 1 << (vmm->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; |
| |
| vmm->map_sg(vma, pgt, mem, pte, len, list); |
| |
| num -= len; |
| pte += len; |
| list += len; |
| if (unlikely(end >= max)) { |
| pde++; |
| pte = 0; |
| } |
| } |
| |
| vmm->flush(vm); |
| } |
| |
| void |
| nouveau_vm_map(struct nouveau_vma *vma, struct nouveau_mem *node) |
| { |
| if (node->sg) |
| nouveau_vm_map_sg_table(vma, 0, node->size << 12, node); |
| else |
| if (node->pages) |
| nouveau_vm_map_sg(vma, 0, node->size << 12, node); |
| else |
| nouveau_vm_map_at(vma, 0, node); |
| } |
| |
| void |
| nouveau_vm_unmap_at(struct nouveau_vma *vma, u64 delta, u64 length) |
| { |
| struct nouveau_vm *vm = vma->vm; |
| struct nouveau_vmmgr *vmm = vm->vmm; |
| int big = vma->node->type != vmm->spg_shift; |
| u32 offset = vma->node->offset + (delta >> 12); |
| u32 bits = vma->node->type - 12; |
| u32 num = length >> vma->node->type; |
| u32 pde = (offset >> vmm->pgt_bits) - vm->fpde; |
| u32 pte = (offset & ((1 << vmm->pgt_bits) - 1)) >> bits; |
| u32 max = 1 << (vmm->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; |
| |
| vmm->unmap(pgt, pte, len); |
| |
| num -= len; |
| pte += len; |
| if (unlikely(end >= max)) { |
| pde++; |
| pte = 0; |
| } |
| } |
| |
| vmm->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_vmmgr *vmm = vm->vmm; |
| 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) { |
| vmm->map_pgt(vpgd->obj, pde, vpgt->obj); |
| } |
| |
| mutex_unlock(&nv_subdev(vmm)->mutex); |
| nouveau_gpuobj_ref(NULL, &pgt); |
| mutex_lock(&nv_subdev(vmm)->mutex); |
| } |
| } |
| |
| static int |
| nouveau_vm_map_pgt(struct nouveau_vm *vm, u32 pde, u32 type) |
| { |
| struct nouveau_vmmgr *vmm = vm->vmm; |
| struct nouveau_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; |
| struct nouveau_vm_pgd *vpgd; |
| struct nouveau_gpuobj *pgt; |
| int big = (type != vmm->spg_shift); |
| u32 pgt_size; |
| int ret; |
| |
| pgt_size = (1 << (vmm->pgt_bits + 12)) >> type; |
| pgt_size *= 8; |
| |
| mutex_unlock(&nv_subdev(vmm)->mutex); |
| ret = nouveau_gpuobj_new(nv_object(vm->vmm), NULL, pgt_size, 0x1000, |
| NVOBJ_FLAG_ZERO_ALLOC, &pgt); |
| mutex_lock(&nv_subdev(vmm)->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(vmm)->mutex); |
| nouveau_gpuobj_ref(NULL, &pgt); |
| mutex_lock(&nv_subdev(vmm)->mutex); |
| return 0; |
| } |
| |
| vpgt->obj[big] = pgt; |
| list_for_each_entry(vpgd, &vm->pgd_list, head) { |
| vmm->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) |
| { |
| struct nouveau_vmmgr *vmm = vm->vmm; |
| u32 align = (1 << page_shift) >> 12; |
| u32 msize = size >> 12; |
| u32 fpde, lpde, pde; |
| int ret; |
| |
| mutex_lock(&nv_subdev(vmm)->mutex); |
| ret = nouveau_mm_head(&vm->mm, page_shift, msize, msize, align, |
| &vma->node); |
| if (unlikely(ret != 0)) { |
| mutex_unlock(&nv_subdev(vmm)->mutex); |
| return ret; |
| } |
| |
| fpde = (vma->node->offset >> vmm->pgt_bits); |
| lpde = (vma->node->offset + vma->node->length - 1) >> vmm->pgt_bits; |
| |
| for (pde = fpde; pde <= lpde; pde++) { |
| struct nouveau_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; |
| int big = (vma->node->type != vmm->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_free(&vm->mm, &vma->node); |
| mutex_unlock(&nv_subdev(vmm)->mutex); |
| return ret; |
| } |
| } |
| mutex_unlock(&nv_subdev(vmm)->mutex); |
| |
| vma->vm = NULL; |
| nouveau_vm_ref(vm, &vma->vm, NULL); |
| 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; |
| struct nouveau_vmmgr *vmm = vm->vmm; |
| u32 fpde, lpde; |
| |
| if (unlikely(vma->node == NULL)) |
| return; |
| fpde = (vma->node->offset >> vmm->pgt_bits); |
| lpde = (vma->node->offset + vma->node->length - 1) >> vmm->pgt_bits; |
| |
| mutex_lock(&nv_subdev(vmm)->mutex); |
| nouveau_vm_unmap_pgt(vm, vma->node->type != vmm->spg_shift, fpde, lpde); |
| nouveau_mm_free(&vm->mm, &vma->node); |
| mutex_unlock(&nv_subdev(vmm)->mutex); |
| |
| nouveau_vm_ref(NULL, &vma->vm, NULL); |
| } |
| |
| int |
| nouveau_vm_create(struct nouveau_vmmgr *vmm, u64 offset, u64 length, |
| u64 mm_offset, u32 block, struct nouveau_vm **pvm) |
| { |
| struct nouveau_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->vmm = vmm; |
| kref_init(&vm->refcount); |
| vm->fpde = offset >> (vmm->pgt_bits + 12); |
| vm->lpde = (offset + length - 1) >> (vmm->pgt_bits + 12); |
| |
| vm->pgt = vzalloc((vm->lpde - vm->fpde + 1) * sizeof(*vm->pgt)); |
| if (!vm->pgt) { |
| kfree(vm); |
| return -ENOMEM; |
| } |
| |
| ret = nouveau_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 |
| nouveau_vm_new(struct nouveau_device *device, u64 offset, u64 length, |
| u64 mm_offset, struct nouveau_vm **pvm) |
| { |
| struct nouveau_vmmgr *vmm = nouveau_vmmgr(device); |
| return vmm->create(vmm, offset, length, mm_offset, pvm); |
| } |
| |
| static int |
| nouveau_vm_link(struct nouveau_vm *vm, struct nouveau_gpuobj *pgd) |
| { |
| struct nouveau_vmmgr *vmm = vm->vmm; |
| 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(&nv_subdev(vmm)->mutex); |
| for (i = vm->fpde; i <= vm->lpde; i++) |
| vmm->map_pgt(pgd, i, vm->pgt[i - vm->fpde].obj); |
| list_add(&vpgd->head, &vm->pgd_list); |
| mutex_unlock(&nv_subdev(vmm)->mutex); |
| return 0; |
| } |
| |
| static void |
| nouveau_vm_unlink(struct nouveau_vm *vm, struct nouveau_gpuobj *mpgd) |
| { |
| struct nouveau_vmmgr *vmm = vm->vmm; |
| struct nouveau_vm_pgd *vpgd, *tmp; |
| struct nouveau_gpuobj *pgd = NULL; |
| |
| if (!mpgd) |
| return; |
| |
| mutex_lock(&nv_subdev(vmm)->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(vmm)->mutex); |
| |
| nouveau_gpuobj_ref(NULL, &pgd); |
| } |
| |
| static void |
| nouveau_vm_del(struct kref *kref) |
| { |
| struct nouveau_vm *vm = container_of(kref, typeof(*vm), refcount); |
| struct nouveau_vm_pgd *vpgd, *tmp; |
| |
| list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { |
| nouveau_vm_unlink(vm, vpgd->obj); |
| } |
| |
| nouveau_mm_fini(&vm->mm); |
| vfree(vm->pgt); |
| kfree(vm); |
| } |
| |
| int |
| nouveau_vm_ref(struct nouveau_vm *ref, struct nouveau_vm **ptr, |
| struct nouveau_gpuobj *pgd) |
| { |
| if (ref) { |
| int ret = nouveau_vm_link(ref, pgd); |
| if (ret) |
| return ret; |
| |
| kref_get(&ref->refcount); |
| } |
| |
| if (*ptr) { |
| nouveau_vm_unlink(*ptr, pgd); |
| kref_put(&(*ptr)->refcount, nouveau_vm_del); |
| } |
| |
| *ptr = ref; |
| return 0; |
| } |