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drm/msm: add madvise ioctl

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Doesn't do anything too interesting until we wire up shrinker.  Pretty
much lifted from i915.

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark
2016-05-17 15:44:49 -04:00
parent b5b4c264df
commit 4cd33c48ea
5 changed files with 102 additions and 3 deletions
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39
drivers/gpu/drm/msm/msm_drv.c
View File

@@ -690,6 +690,44 @@ static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
return msm_wait_fence(priv->gpu->fctx, args->fence, &timeout, true);
}
static int msm_ioctl_gem_madvise(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_msm_gem_madvise *args = data;
struct drm_gem_object *obj;
int ret;
switch (args->madv) {
case MSM_MADV_DONTNEED:
case MSM_MADV_WILLNEED:
break;
default:
return -EINVAL;
}
ret = mutex_lock_interruptible(&dev->struct_mutex);
if (ret)
return ret;
obj = drm_gem_object_lookup(file, args->handle);
if (!obj) {
ret = -ENOENT;
goto unlock;
}
ret = msm_gem_madvise(obj, args->madv);
if (ret >= 0) {
args->retained = ret;
ret = 0;
}
drm_gem_object_unreference(obj);
unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
}
static const struct drm_ioctl_desc msm_ioctls[] = {
DRM_IOCTL_DEF_DRV(MSM_GET_PARAM, msm_ioctl_get_param, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(MSM_GEM_NEW, msm_ioctl_gem_new, DRM_AUTH|DRM_RENDER_ALLOW),
@@ -698,6 +736,7 @@ static const struct drm_ioctl_desc msm_ioctls[] = {
DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_FINI, msm_ioctl_gem_cpu_fini, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(MSM_GEM_SUBMIT, msm_ioctl_gem_submit, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(MSM_WAIT_FENCE, msm_ioctl_wait_fence, DRM_AUTH|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(MSM_GEM_MADVISE, msm_ioctl_gem_madvise, DRM_AUTH|DRM_RENDER_ALLOW),
};
static const struct vm_operations_struct vm_ops = {

1
drivers/gpu/drm/msm/msm_drv.h
View File

@@ -195,6 +195,7 @@ int msm_gem_prime_pin(struct drm_gem_object *obj);
void msm_gem_prime_unpin(struct drm_gem_object *obj);
void *msm_gem_vaddr_locked(struct drm_gem_object *obj);
void *msm_gem_vaddr(struct drm_gem_object *obj);
int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv);
int msm_gem_sync_object(struct drm_gem_object *obj,
struct msm_fence_context *fctx, bool exclusive);
void msm_gem_move_to_active(struct drm_gem_object *obj,

35
drivers/gpu/drm/msm/msm_gem.c
View File

@@ -413,6 +413,21 @@ void *msm_gem_vaddr(struct drm_gem_object *obj)
return ret;
}
/* Update madvise status, returns true if not purged, else
* false or -errno.
*/
int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv)
{
struct msm_gem_object *msm_obj = to_msm_bo(obj);
WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
if (msm_obj->madv != __MSM_MADV_PURGED)
msm_obj->madv = madv;
return (msm_obj->madv != __MSM_MADV_PURGED);
}
/* must be called before _move_to_active().. */
int msm_gem_sync_object(struct drm_gem_object *obj,
struct msm_fence_context *fctx, bool exclusive)
@@ -464,6 +479,7 @@ void msm_gem_move_to_active(struct drm_gem_object *obj,
struct msm_gpu *gpu, bool exclusive, struct fence *fence)
{
struct msm_gem_object *msm_obj = to_msm_bo(obj);
WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED);
msm_obj->gpu = gpu;
if (exclusive)
reservation_object_add_excl_fence(msm_obj->resv, fence);
@@ -532,13 +548,27 @@ void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
struct reservation_object_list *fobj;
struct fence *fence;
uint64_t off = drm_vma_node_start(&obj->vma_node);
const char *madv;
WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
seq_printf(m, "%08x: %c %2d (%2d) %08llx %p %zu\n",
switch (msm_obj->madv) {
case __MSM_MADV_PURGED:
madv = " purged";
break;
case MSM_MADV_DONTNEED:
madv = " purgeable";
break;
case MSM_MADV_WILLNEED:
default:
madv = "";
break;
}
seq_printf(m, "%08x: %c %2d (%2d) %08llx %p %zu%s\n",
msm_obj->flags, is_active(msm_obj) ? 'A' : 'I',
obj->name, obj->refcount.refcount.counter,
off, msm_obj->vaddr, obj->size);
off, msm_obj->vaddr, obj->size, madv);
rcu_read_lock();
fobj = rcu_dereference(robj->fence);
@@ -688,6 +718,7 @@ static int msm_gem_new_impl(struct drm_device *dev,
msm_obj->vram_node = (void *)&msm_obj[1];
msm_obj->flags = flags;
msm_obj->madv = MSM_MADV_WILLNEED;
if (resv) {
msm_obj->resv = resv;

5
drivers/gpu/drm/msm/msm_gem.h
View File

@@ -29,6 +29,11 @@ struct msm_gem_object {
uint32_t flags;
/**
* Advice: are the backing pages purgeable?
*/
uint8_t madv;
/* And object is either:
* inactive - on priv->inactive_list
* active - on one one of the gpu's active_list.. well, at