drm/nouveau: use drm_mm in preference to custom code doing the same thing

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 2 insertions, 174 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index fb6b791506b..4274281f45c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -35,162 +35,6 @@
 #include "drm_sarea.h"
 #include "nouveau_drv.h"
 
-static struct mem_block *
-split_block(struct mem_block *p, uint64_t start, uint64_t size,
-            struct drm_file *file_priv)
-{
-        /* Maybe cut off the start of an existing block */
-        if (start > p->start) {
-                struct mem_block *newblock =
-                        kmalloc(sizeof(*newblock), GFP_KERNEL);
-                if (!newblock)
-                        goto out;
-                newblock->start = start;
-                newblock->size = p->size - (start - p->start);
-                newblock->file_priv = NULL;
-                newblock->next = p->next;
-                newblock->prev = p;
-                p->next->prev = newblock;
-                p->next = newblock;
-                p->size -= newblock->size;
-                p = newblock;
-        }
-
-        /* Maybe cut off the end of an existing block */
-        if (size < p->size) {
-                struct mem_block *newblock =
-                        kmalloc(sizeof(*newblock), GFP_KERNEL);
-                if (!newblock)
-                        goto out;
-                newblock->start = start + size;
-                newblock->size = p->size - size;
-                newblock->file_priv = NULL;
-                newblock->next = p->next;
-                newblock->prev = p;
-                p->next->prev = newblock;
-                p->next = newblock;
-                p->size = size;
-        }
-
-out:
-        /* Our block is in the middle */
-        p->file_priv = file_priv;
-        return p;
-}
-
-struct mem_block *
-nouveau_mem_alloc_block(struct mem_block *heap, uint64_t size,
-                        int align2, struct drm_file *file_priv, int tail)
-{
-        struct mem_block *p;
-        uint64_t mask = (1 << align2) - 1;
-
-        if (!heap)
-                return NULL;
-
-        if (tail) {
-                list_for_each_prev(p, heap) {
-                        uint64_t start = ((p->start + p->size) - size) & ~mask;
-
-                        if (p->file_priv == NULL && start >= p->start &&
-                            start + size <= p->start + p->size)
-                                return split_block(p, start, size, file_priv);
-                }
-        } else {
-                list_for_each(p, heap) {
-                        uint64_t start = (p->start + mask) & ~mask;
-
-                        if (p->file_priv == NULL &&
-                            start + size <= p->start + p->size)
-                                return split_block(p, start, size, file_priv);
-                }
-        }
-
-        return NULL;
-}
-
-void nouveau_mem_free_block(struct mem_block *p)
-{
-        p->file_priv = NULL;
-
-        /* Assumes a single contiguous range.  Needs a special file_priv in
-         * 'heap' to stop it being subsumed.
-         */
-        if (p->next->file_priv == NULL) {
-                struct mem_block *q = p->next;
-                p->size += q->size;
-                p->next = q->next;
-                p->next->prev = p;
-                kfree(q);
-        }
-
-        if (p->prev->file_priv == NULL) {
-                struct mem_block *q = p->prev;
-                q->size += p->size;
-                q->next = p->next;
-                q->next->prev = q;
-                kfree(p);
-        }
-}
-
-/* Initialize.  How to check for an uninitialized heap?
- */
-int nouveau_mem_init_heap(struct mem_block **heap, uint64_t start,
-                          uint64_t size)
-{
-        struct mem_block *blocks = kmalloc(sizeof(*blocks), GFP_KERNEL);
-
-        if (!blocks)
-                return -ENOMEM;
-
-        *heap = kmalloc(sizeof(**heap), GFP_KERNEL);
-        if (!*heap) {
-                kfree(blocks);
-                return -ENOMEM;
-        }
-
-        blocks->start = start;
-        blocks->size = size;
-        blocks->file_priv = NULL;
-        blocks->next = blocks->prev = *heap;
-
-        memset(*heap, 0, sizeof(**heap));
-        (*heap)->file_priv = (struct drm_file *) -1;
-        (*heap)->next = (*heap)->prev = blocks;
-        return 0;
-}
-
-/*
- * Free all blocks associated with the releasing file_priv
- */
-void nouveau_mem_release(struct drm_file *file_priv, struct mem_block *heap)
-{
-        struct mem_block *p;
-
-        if (!heap || !heap->next)
-                return;
-
-        list_for_each(p, heap) {
-                if (p->file_priv == file_priv)
-                        p->file_priv = NULL;
-        }
-
-        /* Assumes a single contiguous range.  Needs a special file_priv in
-         * 'heap' to stop it being subsumed.
-         */
-        list_for_each(p, heap) {
-                while ((p->file_priv == NULL) &&
-                                        (p->next->file_priv == NULL) &&
-                                        (p->next != heap)) {
-                        struct mem_block *q = p->next;
-                        p->size += q->size;
-                        p->next = q->next;
-                        p->next->prev = p;
-                        kfree(q);
-                }
-        }
-}
-
 /*
  * NV10-NV40 tiling helpers
  */
@@ -421,24 +265,8 @@ nv50_mem_vm_unbind(struct drm_device *dev, uint64_t virt, uint32_t size)
 /*
  * Cleanup everything
  */
-void nouveau_mem_takedown(struct mem_block **heap)
-{
-        struct mem_block *p;
-
-        if (!*heap)
-                return;
-
-        for (p = (*heap)->next; p != *heap;) {
-                struct mem_block *q = p;
-                p = p->next;
-                kfree(q);
-        }
-
-        kfree(*heap);
-        *heap = NULL;
-}
-
-void nouveau_mem_close(struct drm_device *dev)
+void
+nouveau_mem_close(struct drm_device *dev)
 {
         struct drm_nouveau_private *dev_priv = dev->dev_private;