drm/xe/guc: Enable w/a 14022293748 and 22019794406

Enable workarounds for HW bug where render engine reset fails. Given
that we're bumping the minimum required GuC version to 70.29, we're
guaranteed to always have support for this KLV in the GuC.

v2: Enable KLV correctly for either workaround (Lucas)
v4: Add check for minimum supported GuC firmware version. Enable w/a for
hw version 20.01 too. (Daniele)
v5 (Daniele): remove now unneeded fw type and version checks (JohnH)
Signed-off-by: Julia Filipchuk <julia.filipchuk@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240805205435.921921-1-daniele.ceraolospurio@intel.com

drivers/gpu/drm/xe/abi/guc_klvs_abi.h

@@ -351,6 +351,7 @@ enum xe_guc_klv_ids {
 	GUC_WORKAROUND_KLV_ID_GAM_PFQ_SHADOW_TAIL_POLLING				= 0x9005,
 	GUC_WORKAROUND_KLV_ID_DISABLE_MTP_DURING_ASYNC_COMPUTE				= 0x9007,
 	GUC_WA_KLV_NP_RD_WRITE_TO_CLEAR_RCSM_AT_CGP_LATE_RESTORE			= 0x9008,
+	GUC_WORKAROUND_KLV_ID_BACK_TO_BACK_RCS_ENGINE_RESET				= 0x9009,
 };
 
 #endif

drivers/gpu/drm/xe/xe_guc_ads.c

@@ -24,6 +24,7 @@
 #include "xe_map.h"
 #include "xe_mmio.h"
 #include "xe_platform_types.h"
+#include "xe_uc_fw.h"
 #include "xe_wa.h"
 
 /* Slack of a few additional entries per engine */
@@ -367,6 +368,11 @@ static void guc_waklv_init(struct xe_guc_ads *ads)
 					  0xC40,
 					  &offset, &remain);
 
+	if (XE_WA(gt, 14022293748) || XE_WA(gt, 22019794406))
+		guc_waklv_enable_simple(ads,
+					GUC_WORKAROUND_KLV_ID_BACK_TO_BACK_RCS_ENGINE_RESET,
+					&offset, &remain);
+
 	size = guc_ads_waklv_size(ads) - remain;
 	if (!size)
 		return;

drivers/gpu/drm/xe/xe_wa_oob.rules

@@ -27,6 +27,10 @@
 16022287689	GRAPHICS_VERSION(2001)
 		GRAPHICS_VERSION(2004)
 13011645652	GRAPHICS_VERSION(2004)
+14022293748	GRAPHICS_VERSION(2001)
+		GRAPHICS_VERSION(2004)
+22019794406	GRAPHICS_VERSION(2001)
+		GRAPHICS_VERSION(2004)
 22019338487	MEDIA_VERSION(2000)
 		GRAPHICS_VERSION(2001)
 22019338487_display	PLATFORM(LUNARLAKE)