[PATCH v3 3/6] drm/i915/gvt: Make mmio_attribute as type u8 to save 1.5MB memory

[changbin.du at intel.com]

From: Changbin Du <changbin.du at intel.com>

Type u8 is big enough to contain all MMIO attribute flags. As the
total MMIO size is 2MB so we saved 1.5MB memory.

Signed-off-by: Changbin Du <changbin.du at intel.com>
---
 drivers/gpu/drm/i915/gvt/gvt.h      | 2 +-
 drivers/gpu/drm/i915/gvt/handlers.c | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index 1fca76b..9ff371b 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -198,7 +198,7 @@ struct intel_gvt_fence {
 #define INTEL_GVT_MMIO_HASH_BITS 9
 
 struct intel_gvt_mmio {
-	u32 *mmio_attribute;
+	u8 *mmio_attribute;
 	DECLARE_HASHTABLE(mmio_info_table, INTEL_GVT_MMIO_HASH_BITS);
 };
 
diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index 63c3fa1..20aaae6 100644
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -105,7 +105,7 @@ static struct intel_gvt_mmio_info *find_mmio_info(struct intel_gvt *gvt,
 }
 
 static int new_mmio_info(struct intel_gvt *gvt,
-		u32 offset, u32 flags, u32 size,
+		u32 offset, u8 flags, u32 size,
 		u32 addr_mask, u32 ro_mask, u32 device,
 		gvt_mmio_func read, gvt_mmio_func write)
 {
@@ -2937,9 +2937,10 @@ int intel_gvt_setup_mmio_info(struct intel_gvt *gvt)
 {
 	struct intel_gvt_device_info *info = &gvt->device_info;
 	struct drm_i915_private *dev_priv = gvt->dev_priv;
+	int size = info->mmio_size / 4 * sizeof(*gvt->mmio.mmio_attribute);
 	int ret;
 
-	gvt->mmio.mmio_attribute = vzalloc(info->mmio_size);
+	gvt->mmio.mmio_attribute = vzalloc(size);
 	if (!gvt->mmio.mmio_attribute)
 		return -ENOMEM;
 
-- 
2.7.4