diff options
| -rw-r--r-- | linux-core/i915_buffer.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/linux-core/i915_buffer.c b/linux-core/i915_buffer.c index dc2cca33..cdbe579a 100644 --- 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; +} |