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radeon: Split out ring locking and allocation

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We need to handle the ring while we've already locked it, so split out
the allocation and commit functions in order to allow them to be used.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Matthew Garrett 2010-04-30 15:24:17 -04:00 committed by Dave Airlie
parent 78930b1c39
commit 91700f3cac
2 changed files with 23 additions and 6 deletions
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2
drivers/gpu/drm/radeon/radeon.h
View File

@ -471,7 +471,9 @@ int radeon_ib_test(struct radeon_device *rdev);
extern void radeon_ib_bogus_add(struct radeon_device *rdev, struct radeon_ib *ib);
/* Ring access between begin & end cannot sleep */
void radeon_ring_free_size(struct radeon_device *rdev);
int radeon_ring_alloc(struct radeon_device *rdev, unsigned ndw);
int radeon_ring_lock(struct radeon_device *rdev, unsigned ndw);
void radeon_ring_commit(struct radeon_device *rdev);
void radeon_ring_unlock_commit(struct radeon_device *rdev);
void radeon_ring_unlock_undo(struct radeon_device *rdev);
int radeon_ring_test(struct radeon_device *rdev);

27
drivers/gpu/drm/radeon/radeon_ring.c
View File

@ -258,31 +258,41 @@ void radeon_ring_free_size(struct radeon_device *rdev)
}
}
int radeon_ring_lock(struct radeon_device *rdev, unsigned ndw)
int radeon_ring_alloc(struct radeon_device *rdev, unsigned ndw)
{
int r;
/* Align requested size with padding so unlock_commit can
* pad safely */
ndw = (ndw + rdev->cp.align_mask) & ~rdev->cp.align_mask;
mutex_lock(&rdev->cp.mutex);
while (ndw > (rdev->cp.ring_free_dw - 1)) {
radeon_ring_free_size(rdev);
if (ndw < rdev->cp.ring_free_dw) {
break;
}
r = radeon_fence_wait_next(rdev);
if (r) {
mutex_unlock(&rdev->cp.mutex);
if (r)
return r;
}
}
rdev->cp.count_dw = ndw;
rdev->cp.wptr_old = rdev->cp.wptr;
return 0;
}
void radeon_ring_unlock_commit(struct radeon_device *rdev)
int radeon_ring_lock(struct radeon_device *rdev, unsigned ndw)
{
int r;
mutex_lock(&rdev->cp.mutex);
r = radeon_ring_alloc(rdev, ndw);
if (r) {
mutex_unlock(&rdev->cp.mutex);
return r;
}
return 0;
}
void radeon_ring_commit(struct radeon_device *rdev)
{
unsigned count_dw_pad;
unsigned i;
@ -295,6 +305,11 @@ void radeon_ring_unlock_commit(struct radeon_device *rdev)
}
DRM_MEMORYBARRIER();
radeon_cp_commit(rdev);
}
void radeon_ring_unlock_commit(struct radeon_device *rdev)
{
radeon_ring_commit(rdev);
mutex_unlock(&rdev->cp.mutex);
}