/**
* radeon_ring_alloc - allocate space on the ring buffer
*
* @rdev: radeon_device pointer
* @ring: radeon_ring structure holding ring information
* @ndw: number of dwords to allocate in the ring buffer
*
* Allocate @ndw dwords in the ring buffer (all asics).
* Returns 0 on success, error on failure.
*/
int radeon_ring_alloc(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ndw)
{
int r;
/* make sure we aren't trying to allocate more space than there is on the ring */
if (ndw > (ring->ring_size / 4))
return -ENOMEM;
/* Align requested size with padding so unlock_commit can
* pad safely */
radeon_ring_free_size(rdev, ring);
if (ring->ring_free_dw == (ring->ring_size / 4)) {
/* This is an empty ring update lockup info to avoid
* false positive.
*/
radeon_ring_lockup_update(ring);
}
ndw = (ndw + ring->align_mask) & ~ring->align_mask;
while (ndw > (ring->ring_free_dw - 1)) {
radeon_ring_free_size(rdev, ring);
if (ndw < ring->ring_free_dw) {
break;
}
r = radeon_fence_wait_next_locked(rdev, ring->idx);
if (r)
return r;
}
ring->count_dw = ndw;
ring->wptr_old = ring->wptr;
return 0;
}
/**
* radeon_ring_alloc - allocate space on the ring buffer
*
* @rdev: radeon_device pointer
* @ring: radeon_ring structure holding ring information
* @ndw: number of dwords to allocate in the ring buffer
*
* Allocate @ndw dwords in the ring buffer (all asics).
* Returns 0 on success, error on failure.
*/
int radeon_ring_alloc(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ndw)
{
int r;
/* Align requested size with padding so unlock_commit can
* pad safely */
ndw = (ndw + ring->align_mask) & ~ring->align_mask;
while (ndw > (ring->ring_free_dw - 1)) {
radeon_ring_free_size(rdev, ring);
if (ndw < ring->ring_free_dw) {
break;
}
r = radeon_fence_wait_next_locked(rdev, ring->idx);
if (r)
return r;
}
ring->count_dw = ndw;
ring->wptr_old = ring->wptr;
return 0;
}
int radeon_ring_alloc(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ndw)
{
int r;
/* make sure we aren't trying to allocate more space than there is on the ring */
if (ndw > (ring->ring_size / 4))
return -ENOMEM;
/* Align requested size with padding so unlock_commit can
* pad safely */
ndw = (ndw + ring->align_mask) & ~ring->align_mask;
while (ndw > (ring->ring_free_dw - 1)) {
radeon_ring_free_size(rdev, ring);
if (ndw < ring->ring_free_dw) {
break;
}
r = radeon_fence_wait_next_locked(rdev, radeon_ring_index(rdev, ring));
if (r)
return r;
}
ring->count_dw = ndw;
ring->wptr_old = ring->wptr;
return 0;
}