drm/nv50: import new vm code
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_vm.c b/drivers/gpu/drm/nouveau/nouveau_vm.c
new file mode 100644
index 0000000..07ab174
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_vm.c
@@ -0,0 +1,421 @@
+/*
+ * 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;
+ 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;
+
+ 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;
+ 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;
+
+ 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;
+ 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;
+
+ 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, 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)
+ continue;
+
+ list_for_each_entry(vpgd, &vm->pgd_list, head) {
+ vm->unmap_pgt(vpgd->obj, pde);
+ }
+
+ pgt = vpgt->obj;
+ vpgt->obj = NULL;
+
+ 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;
+ 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++)) {
+ mutex_unlock(&vm->mm->mutex);
+ nouveau_gpuobj_ref(NULL, &pgt);
+ mutex_lock(&vm->mm->mutex);
+ return 0;
+ }
+
+ list_for_each_entry(vpgd, &vm->pgd_list, head) {
+ vm->map_pgt(vpgd->obj, type, pde, pgt);
+ }
+
+ vpgt->page_shift = type;
+ vpgt->obj = pgt;
+ 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];
+
+ if (likely(vpgt->refcount)) {
+ vpgt->refcount++;
+ continue;
+ }
+
+ ret = nouveau_vm_map_pgt(vm, pde, vma->node->type);
+ if (ret) {
+ if (pde != fpde)
+ nouveau_vm_unmap_pgt(vm, 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_mm_put(vm->mm, vma->node);
+ vma->node = NULL;
+ nouveau_vm_unmap_pgt(vm, fpde, lpde);
+ mutex_unlock(&vm->mm->mutex);
+}
+
+int
+nouveau_vm_new(struct drm_device *dev, u64 offset, u64 length, u64 mm_offset,
+ u8 pgt_bits, u8 spg_shift, u8 lpg_shift,
+ 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;
+ 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->unmap_pgt = nv50_vm_unmap_pgt;
+ vm->map = nv50_vm_map;
+ vm->map_sg = nv50_vm_map_sg;
+ vm->unmap = nv50_vm_unmap;
+ vm->flush = nv50_vm_flush;
+ } 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;
+ vm->spg_shift = spg_shift;
+ vm->lpg_shift = lpg_shift;
+
+ block = (1 << pgt_bits);
+ if (length < block)
+ block = length;
+
+ 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++) {
+ struct nouveau_vm_pgt *vpgt = &vm->pgt[i - vm->fpde];
+
+ if (!vpgt->obj) {
+ vm->unmap_pgt(pgd, i);
+ continue;
+ }
+
+ vm->map_pgt(pgd, vpgt->page_shift, i, vpgt->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;
+}