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/Makefile b/drivers/gpu/drm/ttm/Makefile
index b256d4a..f3cf6f0 100644
--- a/drivers/gpu/drm/ttm/Makefile
+++ b/drivers/gpu/drm/ttm/Makefile
@@ -4,6 +4,7 @@
ccflags-y := -Iinclude/drm
ttm-y := ttm_agp_backend.o ttm_memory.o ttm_tt.o ttm_bo.o \
ttm_bo_util.o ttm_bo_vm.o ttm_module.o \
- ttm_object.o ttm_lock.o ttm_execbuf_util.o ttm_page_alloc.o
+ ttm_object.o ttm_lock.o ttm_execbuf_util.o ttm_page_alloc.o \
+ ttm_bo_manager.o
obj-$(CONFIG_DRM_TTM) += ttm.o
diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
index 4bf69c4..f999e36 100644
--- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
+++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
@@ -74,6 +74,7 @@
{
struct ttm_agp_backend *agp_be =
container_of(backend, struct ttm_agp_backend, backend);
+ struct drm_mm_node *node = bo_mem->mm_node;
struct agp_memory *mem = agp_be->mem;
int cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
int ret;
@@ -81,7 +82,7 @@
mem->is_flushed = 1;
mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
- ret = agp_bind_memory(mem, bo_mem->mm_node->start);
+ ret = agp_bind_memory(mem, node->start);
if (ret)
printk(KERN_ERR TTM_PFX "AGP Bind memory failed.\n");
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 80d37b4..af7b57a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -84,11 +84,8 @@
man->available_caching);
printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n",
man->default_caching);
- if (mem_type != TTM_PL_SYSTEM) {
- spin_lock(&bdev->glob->lru_lock);
- drm_mm_debug_table(&man->manager, TTM_PFX);
- spin_unlock(&bdev->glob->lru_lock);
- }
+ if (mem_type != TTM_PL_SYSTEM)
+ (*man->func->debug)(man, TTM_PFX);
}
static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
@@ -421,7 +418,7 @@
if (bo->mem.mm_node) {
spin_lock(&bo->lock);
- bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) +
+ bo->offset = (bo->mem.start << PAGE_SHIFT) +
bdev->man[bo->mem.mem_type].gpu_offset;
bo->cur_placement = bo->mem.placement;
spin_unlock(&bo->lock);
@@ -724,52 +721,12 @@
return ret;
}
-static int ttm_bo_man_get_node(struct ttm_buffer_object *bo,
- struct ttm_mem_type_manager *man,
- struct ttm_placement *placement,
- struct ttm_mem_reg *mem,
- struct drm_mm_node **node)
-{
- struct ttm_bo_global *glob = bo->glob;
- unsigned long lpfn;
- int ret;
-
- lpfn = placement->lpfn;
- if (!lpfn)
- lpfn = man->size;
- *node = NULL;
- do {
- ret = drm_mm_pre_get(&man->manager);
- if (unlikely(ret))
- return ret;
-
- spin_lock(&glob->lru_lock);
- *node = drm_mm_search_free_in_range(&man->manager,
- 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);
- return 0;
-}
-
void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
{
- struct ttm_bo_global *glob = bo->glob;
+ struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
- 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;
- }
+ if (mem->mm_node)
+ (*man->func->put_node)(man, mem);
}
EXPORT_SYMBOL(ttm_bo_mem_put);
@@ -788,14 +745,13 @@
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_bo_global *glob = bdev->glob;
struct ttm_mem_type_manager *man = &bdev->man[mem_type];
- struct drm_mm_node *node;
int ret;
do {
- ret = ttm_bo_man_get_node(bo, man, placement, mem, &node);
+ ret = (*man->func->get_node)(man, bo, placement, mem);
if (unlikely(ret != 0))
return ret;
- if (node)
+ if (mem->mm_node)
break;
spin_lock(&glob->lru_lock);
if (list_empty(&man->lru)) {
@@ -808,9 +764,8 @@
if (unlikely(ret != 0))
return ret;
} while (1);
- if (node == NULL)
+ if (mem->mm_node == NULL)
return -ENOMEM;
- mem->mm_node = node;
mem->mem_type = mem_type;
return 0;
}
@@ -884,7 +839,6 @@
bool type_found = false;
bool type_ok = false;
bool has_erestartsys = false;
- struct drm_mm_node *node = NULL;
int i, ret;
mem->mm_node = NULL;
@@ -918,17 +872,15 @@
if (man->has_type && man->use_type) {
type_found = true;
- ret = ttm_bo_man_get_node(bo, man, placement, mem,
- &node);
+ ret = (*man->func->get_node)(man, bo, placement, mem);
if (unlikely(ret))
return ret;
}
- if (node)
+ if (mem->mm_node)
break;
}
- if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || node) {
- mem->mm_node = node;
+ if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
mem->mem_type = mem_type;
mem->placement = cur_flags;
return 0;
@@ -998,7 +950,6 @@
bool interruptible, bool no_wait_reserve,
bool no_wait_gpu)
{
- struct ttm_bo_global *glob = bo->glob;
int ret = 0;
struct ttm_mem_reg mem;
@@ -1026,11 +977,8 @@
goto out_unlock;
ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu);
out_unlock:
- if (ret && mem.mm_node) {
- spin_lock(&glob->lru_lock);
- drm_mm_put_block(mem.mm_node);
- spin_unlock(&glob->lru_lock);
- }
+ if (ret && mem.mm_node)
+ ttm_bo_mem_put(bo, &mem);
return ret;
}
@@ -1038,11 +986,10 @@
struct ttm_mem_reg *mem)
{
int i;
- struct drm_mm_node *node = mem->mm_node;
- if (node && placement->lpfn != 0 &&
- (node->start < placement->fpfn ||
- node->start + node->size > placement->lpfn))
+ if (mem->mm_node && placement->lpfn != 0 &&
+ (mem->start < placement->fpfn ||
+ mem->start + mem->num_pages > placement->lpfn))
return -1;
for (i = 0; i < placement->num_placement; i++) {
@@ -1286,7 +1233,6 @@
int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
{
- struct ttm_bo_global *glob = bdev->glob;
struct ttm_mem_type_manager *man;
int ret = -EINVAL;
@@ -1309,13 +1255,7 @@
if (mem_type > 0) {
ttm_bo_force_list_clean(bdev, mem_type, false);
- spin_lock(&glob->lru_lock);
- if (drm_mm_clean(&man->manager))
- drm_mm_takedown(&man->manager);
- else
- ret = -EBUSY;
-
- spin_unlock(&glob->lru_lock);
+ ret = (*man->func->takedown)(man);
}
return ret;
@@ -1366,6 +1306,7 @@
ret = bdev->driver->init_mem_type(bdev, type, man);
if (ret)
return ret;
+ man->bdev = bdev;
ret = 0;
if (type != TTM_PL_SYSTEM) {
@@ -1375,7 +1316,8 @@
type);
return ret;
}
- ret = drm_mm_init(&man->manager, 0, p_size);
+
+ ret = (*man->func->init)(man, p_size);
if (ret)
return ret;
}
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);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 0ebfe0d..c9d2d4d 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -256,8 +256,7 @@
dir = 1;
if ((old_mem->mem_type == new_mem->mem_type) &&
- (new_mem->mm_node->start <
- old_mem->mm_node->start + old_mem->mm_node->size)) {
+ (new_mem->start < old_mem->start + old_mem->size)) {
dir = -1;
add = new_mem->num_pages - 1;
}