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i915: Add copy-blit operation.

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This commit is contained in:
Thomas Hellstrom 2007-02-05 16:13:32 +01:00
parent 63f2abd721
commit 2d962332de
1 changed files with 44 additions and 0 deletions
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44
linux-core/i915_buffer.c
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@ -96,3 +96,47 @@ int i915_init_mem_type(drm_device_t *dev, uint32_t type,
}
return 0;
}
void i915_emit_copy_blit(drm_device_t *dev,
uint32_t src_offset,
uint32_t dst_offset,
uint32_t pages,
int direction)
{
uint32_t cur_pages;
uint32_t stride = PAGE_SIZE;
drm_i915_private_t *dev_priv = dev->dev_private;
RING_LOCALS;
if (!dev_priv)
return;
if (direction) {
stride = -stride;
src_offset += (pages - 1) << PAGE_SHIFT;
dst_offset += (pages - 1) << PAGE_SHIFT;
}
while(pages > 0) {
cur_pages = pages;
if (cur_pages > 2048)
cur_pages = 2048;
pages -= cur_pages;
BEGIN_LP_RING(8);
OUT_RING(XY_SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
XY_SRC_COPY_BLT_WRITE_RGB);
OUT_RING((stride & 0xffff) | ( 0xcc << 16) | (1 << 24) |
(1 << 25));
OUT_RING(0);
OUT_RING((cur_pages << 16) | (PAGE_SIZE >> 2));
OUT_RING(dst_offset);
OUT_RING(0);
OUT_RING(stride & 0xffff);
OUT_RING(src_offset);
ADVANCE_LP_RING();
dst_offset += (cur_pages << PAGE_SHIFT)*(direction ? -1 : 1);
src_offset += (cur_pages << PAGE_SHIFT)*(direction ? -1 : 1);
}
return;
}