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path: root/drivers/gpu/drm/radeon/radeon_sa.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_sa.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_sa.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_sa.c b/drivers/gpu/drm/radeon/radeon_sa.c
new file mode 100644
index 00000000000..4cce47e7dc0
--- /dev/null
+++ b/drivers/gpu/drm/radeon/radeon_sa.c
@@ -0,0 +1,189 @@
+/*
+ * Copyright 2011 Red Hat Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ */
+/*
+ * Authors:
+ * Jerome Glisse <glisse@freedesktop.org>
+ */
+#include "drmP.h"
+#include "drm.h"
+#include "radeon.h"
+
+int radeon_sa_bo_manager_init(struct radeon_device *rdev,
+ struct radeon_sa_manager *sa_manager,
+ unsigned size, u32 domain)
+{
+ int r;
+
+ sa_manager->bo = NULL;
+ sa_manager->size = size;
+ sa_manager->domain = domain;
+ INIT_LIST_HEAD(&sa_manager->sa_bo);
+
+ r = radeon_bo_create(rdev, size, RADEON_GPU_PAGE_SIZE, true,
+ RADEON_GEM_DOMAIN_CPU, &sa_manager->bo);
+ if (r) {
+ dev_err(rdev->dev, "(%d) failed to allocate bo for manager\n", r);
+ return r;
+ }
+
+ return r;
+}
+
+void radeon_sa_bo_manager_fini(struct radeon_device *rdev,
+ struct radeon_sa_manager *sa_manager)
+{
+ struct radeon_sa_bo *sa_bo, *tmp;
+
+ if (!list_empty(&sa_manager->sa_bo)) {
+ dev_err(rdev->dev, "sa_manager is not empty, clearing anyway\n");
+ }
+ list_for_each_entry_safe(sa_bo, tmp, &sa_manager->sa_bo, list) {
+ list_del_init(&sa_bo->list);
+ }
+ radeon_bo_unref(&sa_manager->bo);
+ sa_manager->size = 0;
+}
+
+int radeon_sa_bo_manager_start(struct radeon_device *rdev,
+ struct radeon_sa_manager *sa_manager)
+{
+ int r;
+
+ if (sa_manager->bo == NULL) {
+ dev_err(rdev->dev, "no bo for sa manager\n");
+ return -EINVAL;
+ }
+
+ /* map the buffer */
+ r = radeon_bo_reserve(sa_manager->bo, false);
+ if (r) {
+ dev_err(rdev->dev, "(%d) failed to reserve manager bo\n", r);
+ return r;
+ }
+ r = radeon_bo_pin(sa_manager->bo, sa_manager->domain, &sa_manager->gpu_addr);
+ if (r) {
+ radeon_bo_unreserve(sa_manager->bo);
+ dev_err(rdev->dev, "(%d) failed to pin manager bo\n", r);
+ return r;
+ }
+ r = radeon_bo_kmap(sa_manager->bo, &sa_manager->cpu_ptr);
+ radeon_bo_unreserve(sa_manager->bo);
+ return r;
+}
+
+int radeon_sa_bo_manager_suspend(struct radeon_device *rdev,
+ struct radeon_sa_manager *sa_manager)
+{
+ int r;
+
+ if (sa_manager->bo == NULL) {
+ dev_err(rdev->dev, "no bo for sa manager\n");
+ return -EINVAL;
+ }
+
+ r = radeon_bo_reserve(sa_manager->bo, false);
+ if (!r) {
+ radeon_bo_kunmap(sa_manager->bo);
+ radeon_bo_unpin(sa_manager->bo);
+ radeon_bo_unreserve(sa_manager->bo);
+ }
+ return r;
+}
+
+/*
+ * Principe is simple, we keep a list of sub allocation in offset
+ * order (first entry has offset == 0, last entry has the highest
+ * offset).
+ *
+ * When allocating new object we first check if there is room at
+ * the end total_size - (last_object_offset + last_object_size) >=
+ * alloc_size. If so we allocate new object there.
+ *
+ * When there is not enough room at the end, we start waiting for
+ * each sub object until we reach object_offset+object_size >=
+ * alloc_size, this object then become the sub object we return.
+ *
+ * Alignment can't be bigger than page size
+ */
+int radeon_sa_bo_new(struct radeon_device *rdev,
+ struct radeon_sa_manager *sa_manager,
+ struct radeon_sa_bo *sa_bo,
+ unsigned size, unsigned align)
+{
+ struct radeon_sa_bo *tmp;
+ struct list_head *head;
+ unsigned offset = 0, wasted = 0;
+
+ BUG_ON(align > RADEON_GPU_PAGE_SIZE);
+ BUG_ON(size > sa_manager->size);
+
+ /* no one ? */
+ head = sa_manager->sa_bo.prev;
+ if (list_empty(&sa_manager->sa_bo)) {
+ goto out;
+ }
+
+ /* look for a hole big enough */
+ offset = 0;
+ list_for_each_entry(tmp, &sa_manager->sa_bo, list) {
+ /* room before this object ? */
+ if ((tmp->offset - offset) >= size) {
+ head = tmp->list.prev;
+ goto out;
+ }
+ offset = tmp->offset + tmp->size;
+ wasted = offset % align;
+ if (wasted) {
+ wasted = align - wasted;
+ }
+ offset += wasted;
+ }
+ /* room at the end ? */
+ head = sa_manager->sa_bo.prev;
+ tmp = list_entry(head, struct radeon_sa_bo, list);
+ offset = tmp->offset + tmp->size;
+ wasted = offset % align;
+ if (wasted) {
+ wasted = align - wasted;
+ }
+ offset += wasted;
+ if ((sa_manager->size - offset) < size) {
+ /* failed to find somethings big enough */
+ return -ENOMEM;
+ }
+
+out:
+ sa_bo->manager = sa_manager;
+ sa_bo->offset = offset;
+ sa_bo->size = size;
+ list_add(&sa_bo->list, head);
+ return 0;
+}
+
+void radeon_sa_bo_free(struct radeon_device *rdev, struct radeon_sa_bo *sa_bo)
+{
+ list_del_init(&sa_bo->list);
+}