i915: Add copy-blit operation.

diff --git a/linux-core/i915_buffer.c b/linux-core/i915_buffer.c
index dc2cca3..cdbe579 100644 (file)
--- a/linux-core/i915_buffer.c
+++ b/linux-core/i915_buffer.c
@@ -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;
+}