kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

drm/amdgpu: add the interface of waiting multiple fences (v4)

Browse source 
v2: agd: rebase and squash in all the previous optimizations and
changes so everything compiles.
v3: squash in Slava's 32bit build fix
v4: rebase on drm-next (fence -> dma_fence),
    squash in Monk's ioctl update patch

Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
 [sumits: fix checkpatch warnings]
Link: http://patchwork.freedesktop.org/patch/msgid/1478290570-30982-2-git-send-email-alexander.deucher@amd.com
This commit is contained in:
Junwei Zhang 2016-11-04 16:16:10 -04:00 • committed by Sumit Semwal
parent 7392b4bb70
commit eef18a827a
5 changed files with 207 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

174
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
View file

@ -1139,6 +1139,180 @@ int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data,
return 0;
}
/**
* amdgpu_cs_get_fence - helper to get fence from drm_amdgpu_fence
*
* @adev: amdgpu device
* @filp: file private
* @user: drm_amdgpu_fence copied from user space
*/
static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
struct drm_file *filp,
struct drm_amdgpu_fence *user)
{
struct amdgpu_ring *ring;
struct amdgpu_ctx *ctx;
struct dma_fence *fence;
int r;
r = amdgpu_cs_get_ring(adev, user->ip_type, user->ip_instance,
user->ring, &ring);
if (r)
return ERR_PTR(r);
ctx = amdgpu_ctx_get(filp->driver_priv, user->ctx_id);
if (ctx == NULL)
return ERR_PTR(-EINVAL);
fence = amdgpu_ctx_get_fence(ctx, ring, user->seq_no);
amdgpu_ctx_put(ctx);
return fence;
}
/**
* amdgpu_cs_wait_all_fence - wait on all fences to signal
*
* @adev: amdgpu device
* @filp: file private
* @wait: wait parameters
* @fences: array of drm_amdgpu_fence
*/
static int amdgpu_cs_wait_all_fences(struct amdgpu_device *adev,
struct drm_file *filp,
union drm_amdgpu_wait_fences *wait,
struct drm_amdgpu_fence *fences)
{
uint32_t fence_count = wait->in.fence_count;
unsigned int i;
long r = 1;
for (i = 0; i < fence_count; i++) {
struct dma_fence *fence;
unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
if (IS_ERR(fence))
return PTR_ERR(fence);
else if (!fence)
continue;
r = dma_fence_wait_timeout(fence, true, timeout);
if (r < 0)
return r;
if (r == 0)
break;
}
memset(wait, 0, sizeof(*wait));
wait->out.status = (r > 0);
return 0;
}
/**
* amdgpu_cs_wait_any_fence - wait on any fence to signal
*
* @adev: amdgpu device
* @filp: file private
* @wait: wait parameters
* @fences: array of drm_amdgpu_fence
*/
static int amdgpu_cs_wait_any_fence(struct amdgpu_device *adev,
struct drm_file *filp,
union drm_amdgpu_wait_fences *wait,
struct drm_amdgpu_fence *fences)
{
unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
uint32_t fence_count = wait->in.fence_count;
uint32_t first = ~0;
struct dma_fence **array;
unsigned int i;
long r;
/* Prepare the fence array */
array = kcalloc(fence_count, sizeof(struct dma_fence *), GFP_KERNEL);
if (array == NULL)
return -ENOMEM;
for (i = 0; i < fence_count; i++) {
struct dma_fence *fence;
fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
if (IS_ERR(fence)) {
r = PTR_ERR(fence);
goto err_free_fence_array;
} else if (fence) {
array[i] = fence;
} else { /* NULL, the fence has been already signaled */
r = 1;
goto out;
}
}
r = dma_fence_wait_any_timeout(array, fence_count, true, timeout,
&first);
if (r < 0)
goto err_free_fence_array;
out:
memset(wait, 0, sizeof(*wait));
wait->out.status = (r > 0);
wait->out.first_signaled = first;
/* set return value 0 to indicate success */
r = 0;
err_free_fence_array:
for (i = 0; i < fence_count; i++)
dma_fence_put(array[i]);
kfree(array);
return r;
}
/**
* amdgpu_cs_wait_fences_ioctl - wait for multiple command submissions to finish
*
* @dev: drm device
* @data: data from userspace
* @filp: file private
*/
int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp)
{
struct amdgpu_device *adev = dev->dev_private;
union drm_amdgpu_wait_fences *wait = data;
uint32_t fence_count = wait->in.fence_count;
struct drm_amdgpu_fence *fences_user;
struct drm_amdgpu_fence *fences;
int r;
/* Get the fences from userspace */
fences = kmalloc_array(fence_count, sizeof(struct drm_amdgpu_fence),
GFP_KERNEL);
if (fences == NULL)
return -ENOMEM;
fences_user = (void __user *)(unsigned long)(wait->in.fences);
if (copy_from_user(fences, fences_user,
sizeof(struct drm_amdgpu_fence) * fence_count)) {
r = -EFAULT;
goto err_free_fences;
}
if (wait->in.wait_all)
r = amdgpu_cs_wait_all_fences(adev, filp, wait, fences);
else
r = amdgpu_cs_wait_any_fence(adev, filp, wait, fences);
err_free_fences:
kfree(fences);
return r;
}
/**
* amdgpu_cs_find_bo_va - find bo_va for VM address
*