[Intel-gfx] [PATCH 2/6] drm/i915: setup io-mapping for LMEM

[Matthew Auld]

From: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>

Signed-off-by: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>
Cc: Matthew Auld <matthew.auld at intel.com>
---
 drivers/gpu/drm/i915/intel_region_lmem.c | 28 ++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_region_lmem.c b/drivers/gpu/drm/i915/intel_region_lmem.c
index 7a3f96e1f766..051069664074 100644
--- a/drivers/gpu/drm/i915/intel_region_lmem.c
+++ b/drivers/gpu/drm/i915/intel_region_lmem.c
@@ -36,8 +36,32 @@ lmem_create_object(struct intel_memory_region *mem,
 	return obj;
 }
 
+static void
+region_lmem_release(struct intel_memory_region *mem)
+{
+	io_mapping_fini(&mem->iomap);
+	intel_memory_region_release_buddy(mem);
+}
+
+static int
+region_lmem_init(struct intel_memory_region *mem)
+{
+	int ret;
+
+	if (!io_mapping_init_wc(&mem->iomap,
+				mem->io_start,
+				resource_size(&mem->region)))
+		return -EIO;
+
+	ret = intel_memory_region_init_buddy(mem);
+	if (ret)
+		io_mapping_fini(&mem->iomap);
+
+	return ret;
+}
+
 const struct intel_memory_region_ops intel_region_lmem_ops = {
-	.init = intel_memory_region_init_buddy,
-	.release = intel_memory_region_release_buddy,
+	.init = region_lmem_init,
+	.release = region_lmem_release,
 	.create_object = lmem_create_object,
 };
-- 
2.20.1