drm/ttm: restructure to allow driver to plug in alternate memory manager
Nouveau will need this on GeForce 8 and up to account for the GPU
reordering physical VRAM for some memory types.
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Acked-by: Thomas Hellström <thellstrom@vmware.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/ttm/ttm_bo_manager.c b/drivers/gpu/drm/ttm/ttm_bo_manager.c
new file mode 100644
index 0000000..7410c19
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_bo_manager.c
@@ -0,0 +1,148 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
+ * 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 above copyright notice and this permission notice (including the
+ * next paragraph) 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 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#include "ttm/ttm_module.h"
+#include "ttm/ttm_bo_driver.h"
+#include "ttm/ttm_placement.h"
+#include <linux/jiffies.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/file.h>
+#include <linux/module.h>
+
+static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
+ struct ttm_buffer_object *bo,
+ struct ttm_placement *placement,
+ struct ttm_mem_reg *mem)
+{
+ struct ttm_bo_global *glob = man->bdev->glob;
+ struct drm_mm *mm = man->priv;
+ struct drm_mm_node *node = NULL;
+ unsigned long lpfn;
+ int ret;
+
+ lpfn = placement->lpfn;
+ if (!lpfn)
+ lpfn = man->size;
+ do {
+ ret = drm_mm_pre_get(mm);
+ if (unlikely(ret))
+ return ret;
+
+ spin_lock(&glob->lru_lock);
+ node = drm_mm_search_free_in_range(mm,
+ mem->num_pages, mem->page_alignment,
+ placement->fpfn, lpfn, 1);
+ if (unlikely(node == NULL)) {
+ spin_unlock(&glob->lru_lock);
+ return 0;
+ }
+ node = drm_mm_get_block_atomic_range(node, mem->num_pages,
+ mem->page_alignment,
+ placement->fpfn,
+ lpfn);
+ spin_unlock(&glob->lru_lock);
+ } while (node == NULL);
+
+ mem->mm_node = node;
+ mem->start = node->start;
+ return 0;
+}
+
+static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
+ struct ttm_mem_reg *mem)
+{
+ struct ttm_bo_global *glob = man->bdev->glob;
+
+ if (mem->mm_node) {
+ spin_lock(&glob->lru_lock);
+ drm_mm_put_block(mem->mm_node);
+ spin_unlock(&glob->lru_lock);
+ mem->mm_node = NULL;
+ }
+}
+
+static int ttm_bo_man_init(struct ttm_mem_type_manager *man,
+ unsigned long p_size)
+{
+ struct drm_mm *mm;
+ int ret;
+
+ mm = kzalloc(sizeof(*mm), GFP_KERNEL);
+ if (!mm)
+ return -ENOMEM;
+
+ ret = drm_mm_init(mm, 0, p_size);
+ if (ret) {
+ kfree(mm);
+ return ret;
+ }
+
+ man->priv = mm;
+ return 0;
+}
+
+static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man)
+{
+ struct ttm_bo_global *glob = man->bdev->glob;
+ struct drm_mm *mm = man->priv;
+ int ret = 0;
+
+ spin_lock(&glob->lru_lock);
+ if (drm_mm_clean(mm)) {
+ drm_mm_takedown(mm);
+ kfree(mm);
+ man->priv = NULL;
+ } else
+ ret = -EBUSY;
+ spin_unlock(&glob->lru_lock);
+ return ret;
+}
+
+static void ttm_bo_man_debug(struct ttm_mem_type_manager *man,
+ const char *prefix)
+{
+ struct ttm_bo_global *glob = man->bdev->glob;
+ struct drm_mm *mm = man->priv;
+
+ spin_lock(&glob->lru_lock);
+ drm_mm_debug_table(mm, prefix);
+ spin_unlock(&glob->lru_lock);
+}
+
+const struct ttm_mem_type_manager_func ttm_bo_manager_func = {
+ ttm_bo_man_init,
+ ttm_bo_man_takedown,
+ ttm_bo_man_get_node,
+ ttm_bo_man_put_node,
+ ttm_bo_man_debug
+};
+EXPORT_SYMBOL(ttm_bo_manager_func);
