drm/xe/uc: Use u64 for offsets for which we use upper_32_bits()

The GGTT is currently a 32 bit address space, but the HW and GuC
support 48b addresses in GGTT-related operations, both to keep the
interface/HW paths common between PPGTT and GGTT and to allow for
future increase of the GGTT size.
This leaves us having to program a 64b field with a 32b offset, which
currently we're in some cases doing this by using an upper_32_bits()
call on a 32b variable, which doesn't make any sense. To do this cleanly
we have 2 options:

1 - Set the upper 32 bits directly to zero.
2 - Use 64b variables for the offset and keep programming the whole thing,
    so we're ready if we ever have bigger offsets.

This patch goes with option #2 and switches the related variables to u64.

v2: don't change the log ctl flag variable (John)
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>
Link: https://patchwork.freedesktop.org/patch/msgid/20240319195101.2784480-1-daniele.ceraolospurio@intel.com

drivers/gpu/drm/xe/xe_guc_hwconfig.c

@@ -14,7 +14,7 @@
 #include "xe_guc.h"
 #include "xe_map.h"
 
-static int send_get_hwconfig(struct xe_guc *guc, u32 ggtt_addr, u32 size)
+static int send_get_hwconfig(struct xe_guc *guc, u64 ggtt_addr, u32 size)
 {
 	u32 action[] = {
 		XE_GUC_ACTION_GET_HWCONFIG,

drivers/gpu/drm/xe/xe_guc_submit.c

@@ -533,7 +533,7 @@ static void register_engine(struct xe_exec_queue *q)
 	info.flags = CONTEXT_REGISTRATION_FLAG_KMD;
 
 	if (xe_exec_queue_is_parallel(q)) {
-		u32 ggtt_addr = xe_lrc_parallel_ggtt_addr(lrc);
+		u64 ggtt_addr = xe_lrc_parallel_ggtt_addr(lrc);
 		struct iosys_map map = xe_lrc_parallel_map(lrc);
 
 		info.wq_desc_lo = lower_32_bits(ggtt_addr +

drivers/gpu/drm/xe/xe_uc_fw.c

@@ -780,7 +780,8 @@ static int uc_fw_xfer(struct xe_uc_fw *uc_fw, u32 offset, u32 dma_flags)
 {
 	struct xe_device *xe = uc_fw_to_xe(uc_fw);
 	struct xe_gt *gt = uc_fw_to_gt(uc_fw);
-	u32 src_offset, dma_ctrl;
+	u64 src_offset;
+	u32 dma_ctrl;
 	int ret;
 
 	xe_force_wake_assert_held(gt_to_fw(gt), XE_FW_GT);