drm/xe: Write all slices if its mcr register

Register GAMREQSTRM_CTRL should be considered mcr register
which should write to all slices as per documentation.

Bspec: 71185
Fixes: 01570b44 ("drm/xe/bmg: implement Wa_16023588340")
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240814095614.909774-3-tejas.upadhyay@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/regs/xe_gt_regs.h

@@ -83,7 +83,7 @@
 #define STATELESS_COMPRESSION_CTRL		XE_REG(0x4148)
 #define   UNIFIED_COMPRESSION_FORMAT		REG_GENMASK(3, 0)
 
-#define XE2_GAMREQSTRM_CTRL			XE_REG(0x4194)
+#define XE2_GAMREQSTRM_CTRL			XE_REG_MCR(0x4194)
 #define   CG_DIS_CNTLBUS			REG_BIT(6)
 
 #define CCS_AUX_INV				XE_REG(0x4208)

drivers/gpu/drm/xe/xe_gt.c

@@ -110,9 +110,9 @@ static void xe_gt_enable_host_l2_vram(struct xe_gt *gt)
 
 	if (!xe_gt_is_media_type(gt)) {
 		xe_mmio_write32(gt, SCRATCH1LPFC, EN_L3_RW_CCS_CACHE_FLUSH);
-		reg = xe_mmio_read32(gt, XE2_GAMREQSTRM_CTRL);
+		reg = xe_gt_mcr_unicast_read_any(gt, XE2_GAMREQSTRM_CTRL);
 		reg |= CG_DIS_CNTLBUS;
-		xe_mmio_write32(gt, XE2_GAMREQSTRM_CTRL, reg);
+		xe_gt_mcr_multicast_write(gt, XE2_GAMREQSTRM_CTRL, reg);
 	}
 
 	xe_gt_mcr_multicast_write(gt, XEHPC_L3CLOS_MASK(3), 0x3);
@@ -134,9 +134,9 @@ static void xe_gt_disable_host_l2_vram(struct xe_gt *gt)
 	if (WARN_ON(err))
 		return;
 
-	reg = xe_mmio_read32(gt, XE2_GAMREQSTRM_CTRL);
+	reg = xe_gt_mcr_unicast_read_any(gt, XE2_GAMREQSTRM_CTRL);
 	reg &= ~CG_DIS_CNTLBUS;
-	xe_mmio_write32(gt, XE2_GAMREQSTRM_CTRL, reg);
+	xe_gt_mcr_multicast_write(gt, XE2_GAMREQSTRM_CTRL, reg);
 
 	xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
 }