diff options
author | Rob Clark <robdclark@chromium.org> | 2020-10-23 09:51:16 -0700 |
---|---|---|
committer | Rob Clark <robdclark@chromium.org> | 2020-11-04 16:00:56 -0800 |
commit | 77d205290aa944895cf7e8bea500b8fd95a6b05b (patch) | |
tree | b2cc8fd3c7501168fc7a0ce2077af832dc9b8b19 /drivers/gpu/drm/msm | |
parent | 77c406038e830a4b6219b14a116cd2a6ac9f4908 (diff) |
drm/msm: Protect ring->submits with it's own lock
One less place to rely on dev->struct_mutex.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm')
-rw-r--r-- | drivers/gpu/drm/msm/msm_gem_submit.c | 2 | ||||
-rw-r--r-- | drivers/gpu/drm/msm/msm_gpu.c | 37 | ||||
-rw-r--r-- | drivers/gpu/drm/msm/msm_ringbuffer.c | 1 | ||||
-rw-r--r-- | drivers/gpu/drm/msm/msm_ringbuffer.h | 6 |
4 files changed, 39 insertions, 7 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c index 044e9bee70a2..24ce4c65429d 100644 --- a/drivers/gpu/drm/msm/msm_gem_submit.c +++ b/drivers/gpu/drm/msm/msm_gem_submit.c @@ -65,7 +65,9 @@ void msm_gem_submit_free(struct msm_gem_submit *submit) unsigned i; dma_fence_put(submit->fence); + spin_lock(&submit->ring->submit_lock); list_del(&submit->node); + spin_unlock(&submit->ring->submit_lock); put_pid(submit->pid); msm_submitqueue_put(submit->queue); diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index 93965f2119db..6e6b170b9e5d 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -267,6 +267,7 @@ static void update_fences(struct msm_gpu *gpu, struct msm_ringbuffer *ring, { struct msm_gem_submit *submit; + spin_lock(&ring->submit_lock); list_for_each_entry(submit, &ring->submits, node) { if (submit->seqno > fence) break; @@ -274,6 +275,7 @@ static void update_fences(struct msm_gpu *gpu, struct msm_ringbuffer *ring, msm_update_fence(submit->ring->fctx, submit->fence->seqno); } + spin_unlock(&ring->submit_lock); } #ifdef CONFIG_DEV_COREDUMP @@ -429,11 +431,14 @@ find_submit(struct msm_ringbuffer *ring, uint32_t fence) { struct msm_gem_submit *submit; - WARN_ON(!mutex_is_locked(&ring->gpu->dev->struct_mutex)); - - list_for_each_entry(submit, &ring->submits, node) - if (submit->seqno == fence) + spin_lock(&ring->submit_lock); + list_for_each_entry(submit, &ring->submits, node) { + if (submit->seqno == fence) { + spin_unlock(&ring->submit_lock); return submit; + } + } + spin_unlock(&ring->submit_lock); return NULL; } @@ -530,8 +535,10 @@ static void recover_worker(struct kthread_work *work) for (i = 0; i < gpu->nr_rings; i++) { struct msm_ringbuffer *ring = gpu->rb[i]; + spin_lock(&ring->submit_lock); list_for_each_entry(submit, &ring->submits, node) gpu->funcs->submit(gpu, submit); + spin_unlock(&ring->submit_lock); } } @@ -717,7 +724,6 @@ static void retire_submit(struct msm_gpu *gpu, struct msm_ringbuffer *ring, static void retire_submits(struct msm_gpu *gpu) { struct drm_device *dev = gpu->dev; - struct msm_gem_submit *submit, *tmp; int i; WARN_ON(!mutex_is_locked(&dev->struct_mutex)); @@ -726,9 +732,24 @@ static void retire_submits(struct msm_gpu *gpu) for (i = 0; i < gpu->nr_rings; i++) { struct msm_ringbuffer *ring = gpu->rb[i]; - list_for_each_entry_safe(submit, tmp, &ring->submits, node) { - if (dma_fence_is_signaled(submit->fence)) + while (true) { + struct msm_gem_submit *submit = NULL; + + spin_lock(&ring->submit_lock); + submit = list_first_entry_or_null(&ring->submits, + struct msm_gem_submit, node); + spin_unlock(&ring->submit_lock); + + /* + * If no submit, we are done. If submit->fence hasn't + * been signalled, then later submits are not signalled + * either, so we are also done. + */ + if (submit && dma_fence_is_signaled(submit->fence)) { retire_submit(gpu, ring, submit); + } else { + break; + } } } } @@ -770,7 +791,9 @@ void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit) submit->seqno = ++ring->seqno; + spin_lock(&ring->submit_lock); list_add_tail(&submit->node, &ring->submits); + spin_unlock(&ring->submit_lock); msm_rd_dump_submit(priv->rd, submit, NULL); diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.c b/drivers/gpu/drm/msm/msm_ringbuffer.c index 1b6958e908dc..4d2a2a4abef8 100644 --- a/drivers/gpu/drm/msm/msm_ringbuffer.c +++ b/drivers/gpu/drm/msm/msm_ringbuffer.c @@ -46,6 +46,7 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id, ring->memptrs_iova = memptrs_iova; INIT_LIST_HEAD(&ring->submits); + spin_lock_init(&ring->submit_lock); spin_lock_init(&ring->preempt_lock); snprintf(name, sizeof(name), "gpu-ring-%d", ring->id); diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.h b/drivers/gpu/drm/msm/msm_ringbuffer.h index 4956d1bc5d0e..fe55d4a1aa16 100644 --- a/drivers/gpu/drm/msm/msm_ringbuffer.h +++ b/drivers/gpu/drm/msm/msm_ringbuffer.h @@ -39,7 +39,13 @@ struct msm_ringbuffer { int id; struct drm_gem_object *bo; uint32_t *start, *end, *cur, *next; + + /* + * List of in-flight submits on this ring. Protected by submit_lock. + */ struct list_head submits; + spinlock_t submit_lock; + uint64_t iova; uint32_t seqno; uint32_t hangcheck_fence; |