drm/xe/pf: Convert control state to bitmap

In upcoming changes, the number of states will increase as a result of
introducing SAVE and RESTORE states.
This means that using unsigned long as underlying storage won't work on
32-bit architectures, as we'll run out of bits.
Use bitmap instead.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202510231918.XlOqymLC-lkp@intel.com/
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251112132220.516975-4-michal.winiarski@intel.com
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>

Author: mwiniars

drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c

@@ -225,7 +225,7 @@ static unsigned long *pf_peek_vf_state(struct xe_gt *gt, unsigned int vfid)
 {
 	struct xe_gt_sriov_control_state *cs = pf_pick_vf_control(gt, vfid);
 
-	return &cs->state;
+	return cs->state;
 }
 
 static bool pf_check_vf_state(struct xe_gt *gt, unsigned int vfid,

drivers/gpu/drm/xe/xe_gt_sriov_pf_control_types.h

@@ -73,17 +73,19 @@ enum xe_gt_sriov_control_bits {
 	XE_GT_SRIOV_STATE_STOP_FAILED,
 	XE_GT_SRIOV_STATE_STOPPED,
 
-	XE_GT_SRIOV_STATE_MISMATCH = BITS_PER_LONG - 1,
+	XE_GT_SRIOV_STATE_MISMATCH, /* always keep as last */
 };
 
+#define XE_GT_SRIOV_NUM_STATES (XE_GT_SRIOV_STATE_MISMATCH + 1)
+
 /**
  * struct xe_gt_sriov_control_state - GT-level per-VF control state.
  *
  * Used by the PF driver to maintain per-VF control data.
  */
 struct xe_gt_sriov_control_state {
 	/** @state: VF state bits */
-	unsigned long state;
+	DECLARE_BITMAP(state, XE_GT_SRIOV_NUM_STATES);
 
 	/** @done: completion of async operations */
 	struct completion done;