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drm/radeon: fix ring free alignment calculations 

fd.o bz#21849

We were aligning to +16 dwords, instead of to the next 16dword
boundary in the ring. Fix the calculation to go to the next 16dword
boundary when space checking.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2009-06-04 07:08:13 +10:00 committed by Dave Airlie
parent b8da7de56c
commit 9863871bd1
2 changed files with 6 additions and 3 deletions
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4
drivers/gpu/drm/radeon/radeon_cp.c
View File

@ -2185,9 +2185,9 @@ void radeon_commit_ring(drm_radeon_private_t *dev_priv)
/* check if the ring is padded out to 16-dword alignment */
tail_aligned = dev_priv->ring.tail & 0xf;
tail_aligned = dev_priv->ring.tail & (RADEON_RING_ALIGN-1);
if (tail_aligned) {
int num_p2 = 16 - tail_aligned;
int num_p2 = RADEON_RING_ALIGN - tail_aligned;
ring = dev_priv->ring.start;
/* pad with some CP_PACKET2 */

5
drivers/gpu/drm/radeon/radeon_drv.h
View File

@ -1964,11 +1964,14 @@ do { \
#define RING_LOCALS int write, _nr, _align_nr; unsigned int mask; u32 *ring;
#define RADEON_RING_ALIGN 16
#define BEGIN_RING( n ) do { \
if ( RADEON_VERBOSE ) { \
DRM_INFO( "BEGIN_RING( %d )\n", (n)); \
} \
_align_nr = (n + 0xf) & ~0xf; \
_align_nr = RADEON_RING_ALIGN - ((dev_priv->ring.tail + n) & (RADEON_RING_ALIGN-1)); \
_align_nr += n; \
if (dev_priv->ring.space <= (_align_nr * sizeof(u32))) { \
COMMIT_RING(); \
radeon_wait_ring( dev_priv, _align_nr * sizeof(u32)); \