From: Rob Clark <robdcl...@chromium.org>
Mark all the bos in the submit as active, before pinning, to prevent
evicting a buffer in the same submit to make room for a buffer earlier
in the table.
Signed-off-by: Rob Clark <robdcl...@chromium.org>
---
drivers/gpu/drm/msm/msm_gem.c | 2 --
drivers/gpu/drm/msm/msm_gem_submit.c | 28 ++++++++++++++++++++--------
2 files changed, 20 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 41a111c49cc7..71a589fd4ba8 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -131,7 +131,6 @@ static struct page **get_pages(struct drm_gem_object *obj)
if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
sync_for_device(msm_obj);
- GEM_WARN_ON(msm_obj->active_count);
update_inactive(msm_obj);
}
@@ -815,7 +814,6 @@ void msm_gem_active_get(struct drm_gem_object *obj, struct
msm_gpu *gpu)
GEM_WARN_ON(!msm_gem_is_locked(obj));
GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED);
GEM_WARN_ON(msm_obj->dontneed);
- GEM_WARN_ON(!msm_obj->sgt);
if (msm_obj->active_count++ == 0) {
mutex_lock(&priv->mm_lock);
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c
b/drivers/gpu/drm/msm/msm_gem_submit.c
index b60c3f7ed551..2615a4b3a2e9 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -24,7 +24,8 @@
/* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
#define BO_VALID 0x8000 /* is current addr in cmdstream correct/valid? */
#define BO_LOCKED 0x4000 /* obj lock is held */
-#define BO_PINNED 0x2000 /* obj is pinned and on active list */
+#define BO_ACTIVE 0x2000 /* active refcnt is held */
+#define BO_PINNED 0x1000 /* obj is pinned and on active list */
static struct msm_gem_submit *submit_create(struct drm_device *dev,
struct msm_gpu *gpu,
@@ -252,10 +253,11 @@ static void submit_cleanup_bo(struct msm_gem_submit
*submit, int i,
struct drm_gem_object *obj = &submit->bos[i].obj->base;
unsigned flags = submit->bos[i].flags & cleanup_flags;
- if (flags & BO_PINNED) {
+ if (flags & BO_PINNED)
msm_gem_unpin_iova_locked(obj, submit->aspace);
+
+ if (flags & BO_ACTIVE)
msm_gem_active_put(obj);
- }
if (flags & BO_LOCKED)
dma_resv_unlock(obj->resv);
@@ -265,7 +267,7 @@ static void submit_cleanup_bo(struct msm_gem_submit
*submit, int i,
static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
{
- submit_cleanup_bo(submit, i, BO_PINNED | BO_LOCKED);
+ submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE | BO_LOCKED);
if (!(submit->bos[i].flags & BO_VALID))
submit->bos[i].iova = 0;
@@ -357,6 +359,18 @@ static int submit_pin_objects(struct msm_gem_submit
*submit)
submit->valid = true;
+ /*
+ * Increment active_count first, so if under memory pressure, we
+ * don't inadvertently evict a bo needed by the submit in order
+ * to pin an earlier bo in the same submit.
+ */
+ for (i = 0; i < submit->nr_bos; i++) {
+ struct drm_gem_object *obj = &submit->bos[i].obj->base;
+
+ msm_gem_active_get(obj, submit->gpu);
+ submit->bos[i].flags |= BO_ACTIVE;
+ }
+
for (i = 0; i < submit->nr_bos; i++) {
struct drm_gem_object *obj = &submit->bos[i].obj->base;
uint64_t iova;
@@ -368,8 +382,6 @@ static int submit_pin_objects(struct msm_gem_submit *submit)
if (ret)
break;
- msm_gem_active_get(obj, submit->gpu);
-
submit->bos[i].flags |= BO_PINNED;
if (iova == submit->bos[i].iova) {
@@ -503,7 +515,7 @@ static void submit_cleanup(struct msm_gem_submit *submit,
bool error)
unsigned i;
if (error)
- cleanup_flags |= BO_PINNED;
+ cleanup_flags |= BO_PINNED | BO_ACTIVE;
for (i = 0; i < submit->nr_bos; i++) {
struct msm_gem_object *msm_obj = submit->bos[i].obj;
@@ -522,7 +534,7 @@ void msm_submit_retire(struct msm_gem_submit *submit)
struct drm_gem_object *obj = &submit->bos[i].obj->base;
msm_gem_lock(obj);
- submit_cleanup_bo(submit, i, BO_PINNED);
+ submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE);
msm_gem_unlock(obj);
drm_gem_object_put(obj);
}
--
2.31.1
