lib/i915: add gem_create_with_cpu_access_in_memory_regions

Most users shouldn't care about such an interface, but where required,
this should be useful to aid in setting NEEDS_CPU_ACCESS for a given BO.
Underneath we try to smooth over needing to provide an explicit SMEM
region, or if this is SMEM-only, we don't want the kernel to throw an
error.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/lib/i915/intel_memory_region.c b/lib/i915/intel_memory_region.c
index ce04c6a3..3173507f 100644
--- a/lib/i915/intel_memory_region.c
+++ b/lib/i915/intel_memory_region.c
@@ -197,7 +197,7 @@ bool gem_has_lmem(int fd)
 
 /* A version of gem_create_in_memory_region_list which can be allowed to
    fail so that the object creation can be retried */
-int __gem_create_in_memory_region_list(int fd, uint32_t *handle, uint64_t *size,
+int __gem_create_in_memory_region_list(int fd, uint32_t *handle, uint64_t *size, uint32_t flags,
 				       struct drm_i915_gem_memory_class_instance *mem_regions,
 				       int num_regions)
 {
@@ -208,7 +208,9 @@ int __gem_create_in_memory_region_list(int fd, uint32_t *handle, uint64_t *size,
 	};
 	int ret;
 
-	ret = __gem_create_ext(fd, size, 0, handle, &ext_regions.base);
+	ret = __gem_create_ext(fd, size, flags, handle, &ext_regions.base);
+	if (flags && ret == -EINVAL)
+		ret = __gem_create_ext(fd, size, 0, handle, &ext_regions.base);
 
 	/*
 	 * Provide fallback for stable kernels if region passed in the array
@@ -231,12 +233,12 @@ int __gem_create_in_memory_region_list(int fd, uint32_t *handle, uint64_t *size,
  * @mem_regions: memory regions array (priority list)
  * @num_regions: @mem_regions length
  */
-uint32_t gem_create_in_memory_region_list(int fd, uint64_t size,
+uint32_t gem_create_in_memory_region_list(int fd, uint64_t size, uint32_t flags,
 					  struct drm_i915_gem_memory_class_instance *mem_regions,
 					  int num_regions)
 {
 	uint32_t handle;
-	int ret = __gem_create_in_memory_region_list(fd, &handle, &size,
+	int ret = __gem_create_in_memory_region_list(fd, &handle, &size, flags,
 						     mem_regions, num_regions);
 	igt_assert_eq(ret, 0);
 	return handle;