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authorDavid Miller <davem@davemloft.net>2009-02-12 02:15:44 -0800
committerDave Airlie <airlied@redhat.com>2009-03-13 14:24:02 +1000
commite8a894372b4ea05dc266ba7d7a7634315b6230e8 (patch)
treeb6aa5fc6fec46ca6059989fb718b8049b35a22a7 /drivers/gpu
parentb266503072f824a82d585a6d41ebd591a2d7daa4 (diff)
drm: radeon: Fix calculation of RB_RPTR_ADDR in non-AGP case.
The address needs to be a GART relative address, rather than a PCI DMA address. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/radeon_cp.c15
1 files changed, 4 insertions, 11 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index 8a8a82a2c17..4a56e7d626a 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -657,17 +657,10 @@ static void radeon_cp_init_ring_buffer(struct drm_device * dev,
} else
#endif
{
- struct drm_sg_mem *entry = dev->sg;
- unsigned long tmp_ofs, page_ofs;
-
- tmp_ofs = dev_priv->ring_rptr->offset -
- (unsigned long)dev->sg->virtual;
- page_ofs = tmp_ofs >> PAGE_SHIFT;
-
- RADEON_WRITE(RADEON_CP_RB_RPTR_ADDR, entry->busaddr[page_ofs]);
- DRM_DEBUG("ring rptr: offset=0x%08lx handle=0x%08lx\n",
- (unsigned long)entry->busaddr[page_ofs],
- entry->handle + tmp_ofs);
+ RADEON_WRITE(RADEON_CP_RB_RPTR_ADDR,
+ dev_priv->ring_rptr->offset
+ - ((unsigned long) dev->sg->virtual)
+ + dev_priv->gart_vm_start);
}
/* Set ring buffer size */