[igt-dev] [PATCH i-g-t v34 32/40] lib/intel_bufops: address review comments (alignment, unmap/flush)

[Zbigniew Kempczyński]

1. relax alignment to handle 8bpp surfaces
2. add intel_buf_flush_and_unmap() to avoid unnecessary GEM_SW_FINISH
   ioctl() when buffer is not framebuffer
3. add protecting asserts

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>
---
 lib/intel_bufops.c | 20 ++++++++++++++++----
 lib/intel_bufops.h |  1 +
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/lib/intel_bufops.c b/lib/intel_bufops.c
index 871a28da..714e1aaa 100644
--- a/lib/intel_bufops.c
+++ b/lib/intel_bufops.c
@@ -717,7 +717,7 @@ static void __intel_buf_init(struct buf_ops *bops,
 	igt_assert(buf);
 	igt_assert(width > 0 && height > 0);
 	igt_assert(bpp == 8 || bpp == 16 || bpp == 32 || bpp == 64);
-	igt_assert(alignment % 2 == 0);
+	igt_assert(alignment >= 0);
 
 	memset(buf, 0, sizeof(*buf));
 
@@ -762,7 +762,7 @@ static void __intel_buf_init(struct buf_ops *bops,
 			tile_width = get_stride(devid, tiling);
 			buf->surface[0].stride = ALIGN(width * (bpp / 8), tile_width);
 		} else {
-			buf->surface[0].stride = ALIGN(width * (bpp / 8), alignment ?: 2);
+			buf->surface[0].stride = ALIGN(width * (bpp / 8), alignment ?: 1);
 		}
 
 		buf->surface[0].size = buf->surface[0].stride * height;
@@ -870,6 +870,7 @@ struct intel_buf *intel_buf_create(struct buf_ops *bops,
 void intel_buf_destroy(struct intel_buf *buf)
 {
 	igt_assert(buf);
+	igt_assert(buf->ptr == NULL);
 
 	intel_buf_close(buf->bops, buf);
 	free(buf);
@@ -879,6 +880,7 @@ void *intel_buf_cpu_map(struct intel_buf *buf, bool write)
 {
 	int i915 = buf_ops_get_fd(buf->bops);
 
+	igt_assert(buf);
 	igt_assert(buf->ptr == NULL); /* already mapped */
 
 	buf->cpu_write = write;
@@ -897,6 +899,7 @@ void *intel_buf_device_map(struct intel_buf *buf, bool write)
 {
 	int i915 = buf_ops_get_fd(buf->bops);
 
+	igt_assert(buf);
 	igt_assert(buf->ptr == NULL); /* already mapped */
 
 	buf->ptr = gem_mmap__device_coherent(i915, buf->handle, 0,
@@ -912,13 +915,22 @@ void *intel_buf_device_map(struct intel_buf *buf, bool write)
 
 void intel_buf_unmap(struct intel_buf *buf)
 {
+	igt_assert(buf);
+	igt_assert(buf->ptr);
+
+	munmap(buf->ptr, buf->surface[0].size);
+	buf->ptr = NULL;
+}
+
+void intel_buf_flush_and_unmap(struct intel_buf *buf)
+{
+	igt_assert(buf);
 	igt_assert(buf->ptr);
 
 	if (buf->cpu_write)
 		gem_sw_finish(buf_ops_get_fd(buf->bops), buf->handle);
 
-	munmap(buf->ptr, buf->surface[0].size);
-	buf->ptr = NULL;
+	intel_buf_unmap(buf);
 }
 
 void intel_buf_print(const struct intel_buf *buf)
diff --git a/lib/intel_bufops.h b/lib/intel_bufops.h
index 75b5f5f6..0a8536ba 100644
--- a/lib/intel_bufops.h
+++ b/lib/intel_bufops.h
@@ -127,6 +127,7 @@ void intel_buf_destroy(struct intel_buf *buf);
 void *intel_buf_cpu_map(struct intel_buf *buf, bool write);
 void *intel_buf_device_map(struct intel_buf *buf, bool write);
 void intel_buf_unmap(struct intel_buf *buf);
+void intel_buf_flush_and_unmap(struct intel_buf *buf);
 
 void intel_buf_print(const struct intel_buf *buf);
 void intel_buf_dump(const struct intel_buf *buf, const char *filename);
-- 
2.26.0