[Mesa-dev] [PATCH 1/2] i965/bufmgr: Add a create_from_prime_tiled function

[Jason Ekstrand]

This new function is an import and a set tiling in one go.
---
 src/mesa/drivers/dri/i965/brw_bufmgr.c | 41 ++++++++++++++++++++++++++--------
 src/mesa/drivers/dri/i965/brw_bufmgr.h |  4 ++++
 2 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_bufmgr.c 
b/src/mesa/drivers/dri/i965/brw_bufmgr.c
index 469895e..889350c 100644
--- a/src/mesa/drivers/dri/i965/brw_bufmgr.c
+++ b/src/mesa/drivers/dri/i965/brw_bufmgr.c
@@ -1133,8 +1133,9 @@ brw_bo_get_tiling(struct brw_bo *bo, uint32_t 
*tiling_mode,
    return 0;
 }
 
-struct brw_bo *
-brw_bo_gem_create_from_prime(struct brw_bufmgr *bufmgr, int prime_fd)
+static struct brw_bo *
+brw_bo_gem_create_from_prime_internal(struct brw_bufmgr *bufmgr, int prime_fd,
+                                      int tiling_mode, uint32_t stride)
 {
    int ret;
    uint32_t handle;
@@ -1185,14 +1186,18 @@ brw_bo_gem_create_from_prime(struct brw_bufmgr *bufmgr, 
int prime_fd)
    bo->reusable = false;
    bo->external = true;
 
-   memclear(get_tiling);
-   get_tiling.handle = bo->gem_handle;
-   if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling))
-      goto err;
+   if (tiling_mode < 0) {
+      memclear(get_tiling);
+      get_tiling.handle = bo->gem_handle;
+      if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling))
+         goto err;
 
-   bo->tiling_mode = get_tiling.tiling_mode;
-   bo->swizzle_mode = get_tiling.swizzle_mode;
-   /* XXX stride is unknown */
+      bo->tiling_mode = get_tiling.tiling_mode;
+      bo->swizzle_mode = get_tiling.swizzle_mode;
+      /* XXX stride is unknown */
+   } else {
+      bo_set_tiling_internal(bo, tiling_mode, stride);
+   }
 
 out:
    mtx_unlock(&bufmgr->lock);
@@ -1204,6 +1209,24 @@ err:
    return NULL;
 }
 
+struct brw_bo *
+brw_bo_gem_create_from_prime(struct brw_bufmgr *bufmgr, int prime_fd)
+{
+   return brw_bo_gem_create_from_prime_internal(bufmgr, prime_fd, -1, 0);
+}
+
+struct brw_bo *
+brw_bo_gem_create_from_prime_tiled(struct brw_bufmgr *bufmgr, int prime_fd,
+                                   uint32_t tiling_mode, uint32_t stride)
+{
+   assert(tiling_mode == I915_TILING_NONE ||
+          tiling_mode == I915_TILING_X ||
+          tiling_mode == I915_TILING_Y);
+
+   return brw_bo_gem_create_from_prime_internal(bufmgr, prime_fd,
+                                                tiling_mode, stride);
+}
+
 static void
 brw_bo_make_external(struct brw_bo *bo)
 {
diff --git a/src/mesa/drivers/dri/i965/brw_bufmgr.h 
b/src/mesa/drivers/dri/i965/brw_bufmgr.h
index 8bfb0e4..6811e78 100644
--- a/src/mesa/drivers/dri/i965/brw_bufmgr.h
+++ b/src/mesa/drivers/dri/i965/brw_bufmgr.h
@@ -339,6 +339,10 @@ void brw_destroy_hw_context(struct brw_bufmgr *bufmgr, 
uint32_t ctx_id);
 int brw_bo_gem_export_to_prime(struct brw_bo *bo, int *prime_fd);
 struct brw_bo *brw_bo_gem_create_from_prime(struct brw_bufmgr *bufmgr,
                                             int prime_fd);
+struct brw_bo *brw_bo_gem_create_from_prime_tiled(struct brw_bufmgr *bufmgr,
+                                                  int prime_fd,
+                                                  uint32_t tiling_mode,
+                                                  uint32_t stride);
 
 uint32_t brw_bo_export_gem_handle(struct brw_bo *bo);
 
-- 
2.5.0.400.gff86faf

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