--- /dev/null
+/*
+ * 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;
+}
Code Review / kvmfornfv.git / blobdiff