[Intel-gfx] [PATCH i-g-t v3 02/11] lib/i915/gem_mman: add fixed mode to mmap__device_coherent

[Matthew Auld]

On discrete we need to fallback to this mode.

v2(Ashutosh):
 - Move it up the pecking order

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Ashutosh Dixit <ashutosh.dixit at intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Ramalingam C <ramalingam.c at intel.com>
---
 lib/i915/gem_mman.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/i915/gem_mman.c b/lib/i915/gem_mman.c
index 11df0d76..c432bb16 100644
--- a/lib/i915/gem_mman.c
+++ b/lib/i915/gem_mman.c
@@ -382,9 +382,11 @@ void *__gem_mmap__device_coherent(int fd, uint32_t handle, uint64_t offset,
 {
 	void *ptr = __gem_mmap_offset(fd, handle, offset, size, prot,
 				      I915_MMAP_OFFSET_WC);
+
+	if (!ptr)
+		ptr = __gem_mmap_offset__fixed(fd, handle, offset, size, prot);
 	if (!ptr)
 		ptr = __gem_mmap__wc(fd, handle, offset, size, prot);
-
 	if (!ptr)
 		ptr = __gem_mmap__gtt(fd, handle, size, prot);
 
-- 
2.26.3