[PATCH i-g-t 13/37] lib/intel_bufops: Add init with handle and size function

[Zbigniew Kempczyński]

For some cases (fb with compression) fb size is bigger than calculated
intel_buf what lead to execbuf failure when allocator is used
along with EXEC_OBJECT_PINNED flag set for all objects.

We need to create intel_buf with size equal to fb so new function
in which we pass handle and size is required.

v2: add bo_size check to better protect input size (Jason)

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Cc: Dominik Grzegorzek <dominik.grzegorzek at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 lib/intel_bufops.c | 34 +++++++++++++++++++++++++++++++---
 lib/intel_bufops.h |  7 +++++++
 2 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/lib/intel_bufops.c b/lib/intel_bufops.c
index eb5ac4dad..00be2bd04 100644
--- a/lib/intel_bufops.c
+++ b/lib/intel_bufops.c
@@ -708,7 +708,8 @@ static void __intel_buf_init(struct buf_ops *bops,
 			     uint32_t handle,
 			     struct intel_buf *buf,
 			     int width, int height, int bpp, int alignment,
-			     uint32_t req_tiling, uint32_t compression)
+			     uint32_t req_tiling, uint32_t compression,
+			     uint64_t bo_size)
 {
 	uint32_t tiling = req_tiling;
 	uint64_t size;
@@ -776,6 +777,11 @@ static void __intel_buf_init(struct buf_ops *bops,
 		size = buf->surface[0].stride * ALIGN(height, align_h);
 	}
 
+	if (bo_size > 0) {
+		igt_assert(bo_size >= size);
+		size = bo_size;
+	}
+
 	/* Store real bo size to avoid mistakes in calculating it again */
 	buf->size = size;
 
@@ -809,7 +815,7 @@ void intel_buf_init(struct buf_ops *bops,
 		    uint32_t tiling, uint32_t compression)
 {
 	__intel_buf_init(bops, 0, buf, width, height, bpp, alignment,
-			 tiling, compression);
+			 tiling, compression, 0);
 
 	intel_buf_set_ownership(buf, true);
 }
@@ -858,7 +864,7 @@ void intel_buf_init_using_handle(struct buf_ops *bops,
 				 uint32_t req_tiling, uint32_t compression)
 {
 	__intel_buf_init(bops, handle, buf, width, height, bpp, alignment,
-			 req_tiling, compression);
+			 req_tiling, compression, 0);
 }
 
 /**
@@ -927,6 +933,28 @@ struct intel_buf *intel_buf_create_using_handle(struct buf_ops *bops,
 	return buf;
 }
 
+struct intel_buf *intel_buf_create_using_handle_and_size(struct buf_ops *bops,
+							 uint32_t handle,
+							 int width, int height,
+							 int bpp, int alignment,
+							 uint32_t req_tiling,
+							 uint32_t compression,
+							 uint64_t size)
+{
+	struct intel_buf *buf;
+
+	igt_assert(bops);
+
+	buf = calloc(1, sizeof(*buf));
+	igt_assert(buf);
+
+	__intel_buf_init(bops, handle, buf, width, height, bpp, alignment,
+			 req_tiling, compression, size);
+
+	return buf;
+}
+
+
 /**
  * intel_buf_destroy
  * @buf: intel_buf
diff --git a/lib/intel_bufops.h b/lib/intel_bufops.h
index 5619fc6fa..54480bff6 100644
--- a/lib/intel_bufops.h
+++ b/lib/intel_bufops.h
@@ -139,6 +139,13 @@ struct intel_buf *intel_buf_create_using_handle(struct buf_ops *bops,
 						uint32_t req_tiling,
 						uint32_t compression);
 
+struct intel_buf *intel_buf_create_using_handle_and_size(struct buf_ops *bops,
+							 uint32_t handle,
+							 int width, int height,
+							 int bpp, int alignment,
+							 uint32_t req_tiling,
+							 uint32_t compression,
+							 uint64_t size);
 void intel_buf_destroy(struct intel_buf *buf);
 
 void *intel_buf_cpu_map(struct intel_buf *buf, bool write);
-- 
2.26.0