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Merge branch 'vmwgfx-next-3.13' of git://people.freedesktop.org/~thomash/linux into drm-next

Browse Source 
A resource eviction fix, and a fix for compilation / sparse problems
from the previous pull.

* 'vmwgfx-next-3.13' of git://people.freedesktop.org/~thomash/linux:
  drm/vmwgfx: Fix a couple of compile / sparse warnings and errors
  drm/vmwgfx: Resource evict fixes
This commit is contained in:
Dave Airlie
2013-11-14 09:51:43 +10:00
parent cf0613d242 e14cd9536b
commit ca9efa1741
3 changed files with 47 additions and 9 deletions
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42
drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
View File

@@ -32,6 +32,8 @@
#include <drm/drmP.h>
#include "vmwgfx_resource_priv.h"
#define VMW_RES_EVICT_ERR_COUNT 10
struct vmw_user_dma_buffer {
struct ttm_base_object base;
struct vmw_dma_buffer dma;
@@ -1091,8 +1093,9 @@ vmw_resource_backoff_reservation(struct ww_acquire_ctx *ticket,
* to a backup buffer.
*
* @res: The resource to evict.
* @interruptible: Whether to wait interruptible.
*/
int vmw_resource_do_evict(struct vmw_resource *res)
int vmw_resource_do_evict(struct vmw_resource *res, bool interruptible)
{
struct ttm_validate_buffer val_buf;
const struct vmw_res_func *func = res->func;
@@ -1102,7 +1105,8 @@ int vmw_resource_do_evict(struct vmw_resource *res)
BUG_ON(!func->may_evict);
val_buf.bo = NULL;
ret = vmw_resource_check_buffer(res, &ticket, true, &val_buf);
ret = vmw_resource_check_buffer(res, &ticket, interruptible,
&val_buf);
if (unlikely(ret != 0))
return ret;
@@ -1141,6 +1145,7 @@ int vmw_resource_validate(struct vmw_resource *res)
struct vmw_private *dev_priv = res->dev_priv;
struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type];
struct ttm_validate_buffer val_buf;
unsigned err_count = 0;
if (likely(!res->func->may_evict))
return 0;
@@ -1155,7 +1160,7 @@ int vmw_resource_validate(struct vmw_resource *res)
write_lock(&dev_priv->resource_lock);
if (list_empty(lru_list) || !res->func->may_evict) {
DRM_ERROR("Out of device device id entries "
DRM_ERROR("Out of device device resources "
"for %s.\n", res->func->type_name);
ret = -EBUSY;
write_unlock(&dev_priv->resource_lock);
@@ -1168,7 +1173,19 @@ int vmw_resource_validate(struct vmw_resource *res)
list_del_init(&evict_res->lru_head);
write_unlock(&dev_priv->resource_lock);
vmw_resource_do_evict(evict_res);
ret = vmw_resource_do_evict(evict_res, true);
if (unlikely(ret != 0)) {
write_lock(&dev_priv->resource_lock);
list_add_tail(&evict_res->lru_head, lru_list);
write_unlock(&dev_priv->resource_lock);
if (ret == -ERESTARTSYS ||
++err_count > VMW_RES_EVICT_ERR_COUNT) {
vmw_resource_unreference(&evict_res);
goto out_no_validate;
}
}
vmw_resource_unreference(&evict_res);
} while (1);
@@ -1253,13 +1270,15 @@ bool vmw_resource_needs_backup(const struct vmw_resource *res)
* @type: The resource type to evict
*
* To avoid thrashing starvation or as part of the hibernation sequence,
* evict all evictable resources of a specific type.
* try to evict all evictable resources of a specific type.
*/
static void vmw_resource_evict_type(struct vmw_private *dev_priv,
enum vmw_res_type type)
{
struct list_head *lru_list = &dev_priv->res_lru[type];
struct vmw_resource *evict_res;
unsigned err_count = 0;
int ret;
do {
write_lock(&dev_priv->resource_lock);
@@ -1272,7 +1291,18 @@ static void vmw_resource_evict_type(struct vmw_private *dev_priv,
lru_head));
list_del_init(&evict_res->lru_head);
write_unlock(&dev_priv->resource_lock);
vmw_resource_do_evict(evict_res);
ret = vmw_resource_do_evict(evict_res, false);
if (unlikely(ret != 0)) {
write_lock(&dev_priv->resource_lock);
list_add_tail(&evict_res->lru_head, lru_list);
write_unlock(&dev_priv->resource_lock);
if (++err_count > VMW_RES_EVICT_ERR_COUNT) {
vmw_resource_unreference(&evict_res);
return;
}
}
vmw_resource_unreference(&evict_res);
} while (1);