drm/xe: Pack fault type and level into a u8

Pack the fault type and level fields into a single u8 to save space in
struct xe_pagefault. This also makes future extensions easier.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Francois Dugast <francois.dugast@intel.com>
Link: https://patch.msgid.link/20260212204227.2764054-2-matthew.brost@intel.com

3 files changed, 20 insertions, 15 deletions

diff --git a/drivers/gpu/drm/xe/xe_guc_pagefault.c b/drivers/gpu/drm/xe/xe_guc_pagefault.c
index 719a18187a31..1166b0a5fa21 100644
--- a/drivers/gpu/drm/xe/xe_guc_pagefault.c
+++ b/drivers/gpu/drm/xe/xe_guc_pagefault.c
@@ -76,11 +76,14 @@ int xe_guc_pagefault_handler(struct xe_guc *guc, u32 *msg, u32 len)
 		 PFD_VIRTUAL_ADDR_LO_SHIFT);
 	pf.consumer.asid = FIELD_GET(PFD_ASID, msg[1]);
 	pf.consumer.access_type = FIELD_GET(PFD_ACCESS_TYPE, msg[2]);
-	pf.consumer.fault_type = FIELD_GET(PFD_FAULT_TYPE, msg[2]);
 	if (FIELD_GET(XE2_PFD_TRVA_FAULT, msg[0]))
-		pf.consumer.fault_level = XE_PAGEFAULT_LEVEL_NACK;
+		pf.consumer.fault_type_level = XE_PAGEFAULT_TYPE_LEVEL_NACK;
 	else
-		pf.consumer.fault_level = FIELD_GET(PFD_FAULT_LEVEL, msg[0]);
+		pf.consumer.fault_type_level =
+			FIELD_PREP(XE_PAGEFAULT_LEVEL_MASK,
+				   FIELD_GET(PFD_FAULT_LEVEL, msg[0])) |
+			FIELD_PREP(XE_PAGEFAULT_TYPE_MASK,
+				   FIELD_GET(PFD_FAULT_TYPE, msg[2]));
 	pf.consumer.engine_class = FIELD_GET(PFD_ENG_CLASS, msg[0]);
 	pf.consumer.engine_instance = FIELD_GET(PFD_ENG_INSTANCE, msg[0]);
 
diff --git a/drivers/gpu/drm/xe/xe_pagefault.c b/drivers/gpu/drm/xe/xe_pagefault.c
index 6bee53d6ffc3..72f589fd2b64 100644
--- a/drivers/gpu/drm/xe/xe_pagefault.c
+++ b/drivers/gpu/drm/xe/xe_pagefault.c
@@ -164,7 +164,7 @@ static int xe_pagefault_service(struct xe_pagefault *pf)
 	bool atomic;
 
 	/* Producer flagged this fault to be nacked */
-	if (pf->consumer.fault_level == XE_PAGEFAULT_LEVEL_NACK)
+	if (pf->consumer.fault_type_level == XE_PAGEFAULT_TYPE_LEVEL_NACK)
 		return -EFAULT;
 
 	vm = xe_pagefault_asid_to_vm(xe, pf->consumer.asid);
@@ -225,17 +225,19 @@ static void xe_pagefault_print(struct xe_pagefault *pf)
 {
 	xe_gt_info(pf->gt, "\n\tASID: %d\n"
 		   "\tFaulted Address: 0x%08x%08x\n"
-		   "\tFaultType: %d\n"
+		   "\tFaultType: %lu\n"
 		   "\tAccessType: %d\n"
-		   "\tFaultLevel: %d\n"
+		   "\tFaultLevel: %lu\n"
 		   "\tEngineClass: %d %s\n"
 		   "\tEngineInstance: %d\n",
 		   pf->consumer.asid,
 		   upper_32_bits(pf->consumer.page_addr),
 		   lower_32_bits(pf->consumer.page_addr),
-		   pf->consumer.fault_type,
+		   FIELD_GET(XE_PAGEFAULT_TYPE_MASK,
+			     pf->consumer.fault_type_level),
 		   pf->consumer.access_type,
-		   pf->consumer.fault_level,
+		   FIELD_GET(XE_PAGEFAULT_LEVEL_MASK,
+			     pf->consumer.fault_type_level),
 		   pf->consumer.engine_class,
 		   xe_hw_engine_class_to_str(pf->consumer.engine_class),
 		   pf->consumer.engine_instance);
diff --git a/drivers/gpu/drm/xe/xe_pagefault_types.h b/drivers/gpu/drm/xe/xe_pagefault_types.h
index d3b516407d60..0e378f41ede6 100644
--- a/drivers/gpu/drm/xe/xe_pagefault_types.h
+++ b/drivers/gpu/drm/xe/xe_pagefault_types.h
@@ -73,19 +73,19 @@ struct xe_pagefault {
 		 */
 		u8 access_type;
 		/**
-		 * @consumer.fault_type: fault type, u8 rather than enum to
-		 * keep size compact
+		 * @consumer.fault_type_level: fault type and level, u8 rather
+		 * than enum to keep size compact
 		 */
-		u8 fault_type;
-#define XE_PAGEFAULT_LEVEL_NACK		0xff	/* Producer indicates nack fault */
-		/** @consumer.fault_level: fault level */
-		u8 fault_level;
+		u8 fault_type_level;
+#define XE_PAGEFAULT_TYPE_LEVEL_NACK		0xff	/* Producer indicates nack fault */
+#define XE_PAGEFAULT_LEVEL_MASK			GENMASK(3, 0)
+#define XE_PAGEFAULT_TYPE_MASK			GENMASK(7, 4)
 		/** @consumer.engine_class: engine class */
 		u8 engine_class;
 		/** @consumer.engine_instance: engine instance */
 		u8 engine_instance;
 		/** consumer.reserved: reserved bits for future expansion */
-		u8 reserved[7];
+		u64 reserved;
 	} consumer;
 	/**
 	 * @producer: State for the producer (i.e., HW/FW interface). Populated