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drm/msm: bigger synchronization hammer 

Because we use a list_head in the bo to track it's position in a submit,
we need to serialize at a higher layer.  Otherwise there are problems
when multiple contexts are SUBMIT'ing in parallel cmdstreams referencing
a shared bo.

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark 2014-02-06 19:19:20 -05:00
parent 9999f105e7
commit c2703b13a6
2 changed files with 5 additions and 7 deletions
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9
drivers/gpu/drm/msm/msm_gem_submit.c
View File

@ -163,7 +163,7 @@ retry:
/* if locking succeeded, pin bo: */
ret = msm_gem_get_iova(&msm_obj->base,
ret = msm_gem_get_iova_locked(&msm_obj->base,
submit->gpu->id, &iova);
/* this would break the logic in the fail path.. there is no
@ -247,7 +247,7 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
/* For now, just map the entire thing. Eventually we probably
* to do it page-by-page, w/ kmap() if not vmap()d..
*/
ptr = msm_gem_vaddr(&obj->base);
ptr = msm_gem_vaddr_locked(&obj->base);
if (IS_ERR(ptr)) {
ret = PTR_ERR(ptr);
@ -307,14 +307,12 @@ static void submit_cleanup(struct msm_gem_submit *submit, bool fail)
{
unsigned i;
mutex_lock(&submit->dev->struct_mutex);
for (i = 0; i < submit->nr_bos; i++) {
struct msm_gem_object *msm_obj = submit->bos[i].obj;
submit_unlock_unpin_bo(submit, i);
list_del_init(&msm_obj->submit_entry);
drm_gem_object_unreference(&msm_obj->base);
}
mutex_unlock(&submit->dev->struct_mutex);
ww_acquire_fini(&submit->ticket);
kfree(submit);
@ -342,6 +340,8 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
if (args->nr_cmds > MAX_CMDS)
return -EINVAL;
mutex_lock(&dev->struct_mutex);
submit = submit_create(dev, gpu, args->nr_bos);
if (!submit) {
ret = -ENOMEM;
@ -410,5 +410,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
out:
if (submit)
submit_cleanup(submit, !!ret);
mutex_unlock(&dev->struct_mutex);
return ret;
}

3
drivers/gpu/drm/msm/msm_gpu.c
View File

@ -298,8 +298,6 @@ int msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
struct msm_drm_private *priv = dev->dev_private;
int i, ret;
mutex_lock(&dev->struct_mutex);
submit->fence = ++priv->next_fence;
gpu->submitted_fence = submit->fence;
@ -331,7 +329,6 @@ int msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
msm_gem_move_to_active(&msm_obj->base, gpu, true, submit->fence);
}
hangcheck_timer_reset(gpu);
mutex_unlock(&dev->struct_mutex);
return ret;
}