[PATCH v4 04/28] drm/xe/pf: Add save/restore control state stubs and connect to debugfs

["Michał Winiarski" <michal.winiarski@intel.com>]

The states will be used by upcoming changes to produce (in case of save)
or consume (in case of resume) the VF migration data.

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
---
 drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c   | 248 ++++++++++++++++++
 drivers/gpu/drm/xe/xe_gt_sriov_pf_control.h   |   4 +
 .../gpu/drm/xe/xe_gt_sriov_pf_control_types.h |  14 +
 drivers/gpu/drm/xe/xe_sriov_pf_control.c      |  96 +++++++
 drivers/gpu/drm/xe/xe_sriov_pf_control.h      |   4 +
 drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c      |  38 +++
 6 files changed, 404 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c
index 8a2577fda4198..a571e1c02a3b4 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c
@@ -184,6 +184,12 @@ static const char *control_bit_to_string(enum xe_gt_sriov_control_bits bit)
 	CASE2STR(PAUSE_SAVE_GUC);
 	CASE2STR(PAUSE_FAILED);
 	CASE2STR(PAUSED);
+	CASE2STR(SAVE_WIP);
+	CASE2STR(SAVE_FAILED);
+	CASE2STR(SAVED);
+	CASE2STR(RESTORE_WIP);
+	CASE2STR(RESTORE_FAILED);
+	CASE2STR(RESTORED);
 	CASE2STR(RESUME_WIP);
 	CASE2STR(RESUME_SEND_RESUME);
 	CASE2STR(RESUME_FAILED);
@@ -208,6 +214,8 @@ static unsigned long pf_get_default_timeout(enum xe_gt_sriov_control_bits bit)
 	case XE_GT_SRIOV_STATE_FLR_WIP:
 	case XE_GT_SRIOV_STATE_FLR_RESET_CONFIG:
 		return 5 * HZ;
+	case XE_GT_SRIOV_STATE_RESTORE_WIP:
+		return 20 * HZ;
 	default:
 		return HZ;
 	}
@@ -329,6 +337,8 @@ static void pf_exit_vf_mismatch(struct xe_gt *gt, unsigned int vfid)
 	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSE_FAILED);
 	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESUME_FAILED);
 	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_FLR_FAILED);
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_FAILED);
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_FAILED);
 }
 
 #define pf_enter_vf_state_machine_bug(gt, vfid) ({	\
@@ -359,6 +369,8 @@ static void pf_queue_vf(struct xe_gt *gt, unsigned int vfid)
 
 static void pf_exit_vf_flr_wip(struct xe_gt *gt, unsigned int vfid);
 static void pf_exit_vf_stop_wip(struct xe_gt *gt, unsigned int vfid);
+static void pf_exit_vf_save_wip(struct xe_gt *gt, unsigned int vfid);
+static void pf_exit_vf_restore_wip(struct xe_gt *gt, unsigned int vfid);
 static void pf_exit_vf_pause_wip(struct xe_gt *gt, unsigned int vfid);
 static void pf_exit_vf_resume_wip(struct xe_gt *gt, unsigned int vfid);
 
@@ -380,6 +392,8 @@ static void pf_exit_vf_wip(struct xe_gt *gt, unsigned int vfid)
 
 		pf_exit_vf_flr_wip(gt, vfid);
 		pf_exit_vf_stop_wip(gt, vfid);
+		pf_exit_vf_save_wip(gt, vfid);
+		pf_exit_vf_restore_wip(gt, vfid);
 		pf_exit_vf_pause_wip(gt, vfid);
 		pf_exit_vf_resume_wip(gt, vfid);
 
@@ -399,6 +413,8 @@ static void pf_enter_vf_ready(struct xe_gt *gt, unsigned int vfid)
 	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSED);
 	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_STOPPED);
 	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESUMED);
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVED);
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORED);
 	pf_exit_vf_mismatch(gt, vfid);
 	pf_exit_vf_wip(gt, vfid);
 }
@@ -675,6 +691,8 @@ static void pf_enter_vf_resumed(struct xe_gt *gt, unsigned int vfid)
 {
 	pf_enter_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESUMED);
 	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSED);
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVED);
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORED);
 	pf_exit_vf_mismatch(gt, vfid);
 	pf_exit_vf_wip(gt, vfid);
 }
@@ -753,6 +771,16 @@ int xe_gt_sriov_pf_control_resume_vf(struct xe_gt *gt, unsigned int vfid)
 		return -EPERM;
 	}
 
+	if (pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_WIP)) {
+		xe_gt_sriov_dbg(gt, "VF%u save is in progress!\n", vfid);
+		return -EBUSY;
+	}
+
+	if (pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_WIP)) {
+		xe_gt_sriov_dbg(gt, "VF%u restore is in progress!\n", vfid);
+		return -EBUSY;
+	}
+
 	if (!pf_enter_vf_resume_wip(gt, vfid)) {
 		xe_gt_sriov_dbg(gt, "VF%u resume already in progress!\n", vfid);
 		return -EALREADY;
@@ -776,6 +804,218 @@ int xe_gt_sriov_pf_control_resume_vf(struct xe_gt *gt, unsigned int vfid)
 	return -ECANCELED;
 }
 
+static void pf_exit_vf_save_wip(struct xe_gt *gt, unsigned int vfid)
+{
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_WIP);
+}
+
+static void pf_enter_vf_saved(struct xe_gt *gt, unsigned int vfid)
+{
+	if (!pf_enter_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVED))
+		pf_enter_vf_state_machine_bug(gt, vfid);
+
+	xe_gt_sriov_dbg(gt, "VF%u saved!\n", vfid);
+
+	pf_expect_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSED);
+	pf_exit_vf_mismatch(gt, vfid);
+	pf_exit_vf_wip(gt, vfid);
+}
+
+static bool pf_handle_vf_save(struct xe_gt *gt, unsigned int vfid)
+{
+	if (!pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_WIP))
+		return false;
+
+	pf_enter_vf_saved(gt, vfid);
+
+	return true;
+}
+
+static bool pf_enter_vf_save_wip(struct xe_gt *gt, unsigned int vfid)
+{
+	if (pf_enter_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_WIP)) {
+		pf_enter_vf_wip(gt, vfid);
+		pf_queue_vf(gt, vfid);
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * xe_gt_sriov_pf_control_trigger_save_vf() - Start an SR-IOV VF migration data save sequence.
+ * @gt: the &xe_gt
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_gt_sriov_pf_control_trigger_save_vf(struct xe_gt *gt, unsigned int vfid)
+{
+	if (pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_STOPPED)) {
+		xe_gt_sriov_dbg(gt, "VF%u is stopped!\n", vfid);
+		return -EPERM;
+	}
+
+	if (!pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSED)) {
+		xe_gt_sriov_dbg(gt, "VF%u is not paused!\n", vfid);
+		return -EPERM;
+	}
+
+	if (pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_WIP)) {
+		xe_gt_sriov_dbg(gt, "VF%u restore is in progress!\n", vfid);
+		return -EBUSY;
+	}
+
+	if (!pf_enter_vf_save_wip(gt, vfid)) {
+		xe_gt_sriov_dbg(gt, "VF%u save already in progress!\n", vfid);
+		return -EALREADY;
+	}
+
+	return 0;
+}
+
+/**
+ * xe_gt_sriov_pf_control_finish_save_vf() - Complete a VF migration data save sequence.
+ * @gt: the &xe_gt
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_gt_sriov_pf_control_finish_save_vf(struct xe_gt *gt, unsigned int vfid)
+{
+	if (!pf_expect_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVED)) {
+		pf_enter_vf_mismatch(gt, vfid);
+		return -EIO;
+	}
+
+	pf_expect_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSED);
+
+	return 0;
+}
+
+static void pf_exit_vf_restore_wip(struct xe_gt *gt, unsigned int vfid)
+{
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_WIP);
+}
+
+static void pf_enter_vf_restored(struct xe_gt *gt, unsigned int vfid)
+{
+	if (!pf_enter_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORED))
+		pf_enter_vf_state_machine_bug(gt, vfid);
+
+	xe_gt_sriov_dbg(gt, "VF%u restored!\n", vfid);
+
+	pf_expect_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSED);
+	pf_exit_vf_mismatch(gt, vfid);
+	pf_exit_vf_wip(gt, vfid);
+}
+
+static bool pf_handle_vf_restore(struct xe_gt *gt, unsigned int vfid)
+{
+	if (!pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_WIP))
+		return false;
+
+	pf_enter_vf_restored(gt, vfid);
+
+	return true;
+}
+
+static bool pf_enter_vf_restore_wip(struct xe_gt *gt, unsigned int vfid)
+{
+	if (pf_enter_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_WIP)) {
+		pf_enter_vf_wip(gt, vfid);
+		pf_queue_vf(gt, vfid);
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * xe_gt_sriov_pf_control_trigger restore_vf() - Start an SR-IOV VF migration data restore sequence.
+ * @gt: the &xe_gt
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_gt_sriov_pf_control_trigger_restore_vf(struct xe_gt *gt, unsigned int vfid)
+{
+	if (pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_STOPPED)) {
+		xe_gt_sriov_dbg(gt, "VF%u is stopped!\n", vfid);
+		return -EPERM;
+	}
+
+	if (!pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSED)) {
+		xe_gt_sriov_dbg(gt, "VF%u is not paused!\n", vfid);
+		return -EPERM;
+	}
+
+	if (pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_WIP)) {
+		xe_gt_sriov_dbg(gt, "VF%u save is in progress!\n", vfid);
+		return -EBUSY;
+	}
+
+	if (!pf_enter_vf_restore_wip(gt, vfid)) {
+		xe_gt_sriov_dbg(gt, "VF%u restore already in progress!\n", vfid);
+		return -EALREADY;
+	}
+
+	return 0;
+}
+
+static int pf_wait_vf_restore_done(struct xe_gt *gt, unsigned int vfid)
+{
+	unsigned long timeout = pf_get_default_timeout(XE_GT_SRIOV_STATE_RESTORE_WIP);
+	int err;
+
+	err = pf_wait_vf_wip_done(gt, vfid, timeout);
+	if (err) {
+		xe_gt_sriov_notice(gt, "VF%u RESTORE didn't finish in %u ms (%pe)\n",
+				   vfid, jiffies_to_msecs(timeout), ERR_PTR(err));
+		return err;
+	}
+
+	if (!pf_expect_vf_not_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_FAILED))
+		return -EIO;
+
+	return 0;
+}
+
+/**
+ * xe_gt_sriov_pf_control_finish_restore_vf() - Complete a VF migration data restore sequence.
+ * @gt: the &xe_gt
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_gt_sriov_pf_control_finish_restore_vf(struct xe_gt *gt, unsigned int vfid)
+{
+	int ret;
+
+	if (pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_WIP)) {
+		ret = pf_wait_vf_restore_done(gt, vfid);
+		if (ret)
+			return ret;
+	}
+
+	if (!pf_expect_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORED)) {
+		pf_enter_vf_mismatch(gt, vfid);
+		return -EIO;
+	}
+
+	pf_expect_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSED);
+
+	return 0;
+}
+
 /**
  * DOC: The VF STOP state machine
  *
@@ -817,6 +1057,8 @@ static void pf_enter_vf_stopped(struct xe_gt *gt, unsigned int vfid)
 
 	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESUMED);
 	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_PAUSED);
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVED);
+	pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORED);
 	pf_exit_vf_mismatch(gt, vfid);
 	pf_exit_vf_wip(gt, vfid);
 }
@@ -1463,6 +1705,12 @@ static bool pf_process_vf_state_machine(struct xe_gt *gt, unsigned int vfid)
 	if (pf_exit_vf_pause_save_guc(gt, vfid))
 		return true;
 
+	if (pf_handle_vf_save(gt, vfid))
+		return true;
+
+	if (pf_handle_vf_restore(gt, vfid))
+		return true;
+
 	if (pf_exit_vf_resume_send_resume(gt, vfid))
 		return true;
 
diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.h b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.h
index 8a72ef3778d47..0286536375d17 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.h
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.h
@@ -16,6 +16,10 @@ void xe_gt_sriov_pf_control_restart(struct xe_gt *gt);
 
 int xe_gt_sriov_pf_control_pause_vf(struct xe_gt *gt, unsigned int vfid);
 int xe_gt_sriov_pf_control_resume_vf(struct xe_gt *gt, unsigned int vfid);
+int xe_gt_sriov_pf_control_trigger_save_vf(struct xe_gt *gt, unsigned int vfid);
+int xe_gt_sriov_pf_control_finish_save_vf(struct xe_gt *gt, unsigned int vfid);
+int xe_gt_sriov_pf_control_trigger_restore_vf(struct xe_gt *gt, unsigned int vfid);
+int xe_gt_sriov_pf_control_finish_restore_vf(struct xe_gt *gt, unsigned int vfid);
 int xe_gt_sriov_pf_control_stop_vf(struct xe_gt *gt, unsigned int vfid);
 int xe_gt_sriov_pf_control_trigger_flr(struct xe_gt *gt, unsigned int vfid);
 int xe_gt_sriov_pf_control_sync_flr(struct xe_gt *gt, unsigned int vfid, bool sync);
diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control_types.h b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control_types.h
index d9282eb259727..c0ce05818e24f 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control_types.h
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control_types.h
@@ -31,6 +31,12 @@
  * @XE_GT_SRIOV_STATE_PAUSE_SAVE_GUC: indicates that the PF needs to save the VF GuC state.
  * @XE_GT_SRIOV_STATE_PAUSE_FAILED: indicates that a VF pause operation has failed.
  * @XE_GT_SRIOV_STATE_PAUSED: indicates that the VF is paused.
+ * @XE_GT_SRIOV_STATE_SAVE_WIP: indicates that VF save operation is in progress.
+ * @XE_GT_SRIOV_STATE_SAVE_FAILED: indicates that VF save operation has failed.
+ * @XE_GT_SRIOV_STATE_SAVED: indicates that VF data is saved.
+ * @XE_GT_SRIOV_STATE_RESTORE_WIP: indicates that VF restore operation is in progress.
+ * @XE_GT_SRIOV_STATE_RESTORE_FAILED: indicates that VF restore operation has failed.
+ * @XE_GT_SRIOV_STATE_RESTORED: indicates that VF data is restored.
  * @XE_GT_SRIOV_STATE_RESUME_WIP: indicates the a VF resume operation is in progress.
  * @XE_GT_SRIOV_STATE_RESUME_SEND_RESUME: indicates that the PF is about to send RESUME command.
  * @XE_GT_SRIOV_STATE_RESUME_FAILED: indicates that a VF resume operation has failed.
@@ -63,6 +69,14 @@ enum xe_gt_sriov_control_bits {
 	XE_GT_SRIOV_STATE_PAUSE_FAILED,
 	XE_GT_SRIOV_STATE_PAUSED,
 
+	XE_GT_SRIOV_STATE_SAVE_WIP,
+	XE_GT_SRIOV_STATE_SAVE_FAILED,
+	XE_GT_SRIOV_STATE_SAVED,
+
+	XE_GT_SRIOV_STATE_RESTORE_WIP,
+	XE_GT_SRIOV_STATE_RESTORE_FAILED,
+	XE_GT_SRIOV_STATE_RESTORED,
+
 	XE_GT_SRIOV_STATE_RESUME_WIP,
 	XE_GT_SRIOV_STATE_RESUME_SEND_RESUME,
 	XE_GT_SRIOV_STATE_RESUME_FAILED,
diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_control.c b/drivers/gpu/drm/xe/xe_sriov_pf_control.c
index 416d00a03fbb7..8d8a01faf5291 100644
--- a/drivers/gpu/drm/xe/xe_sriov_pf_control.c
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_control.c
@@ -149,3 +149,99 @@ int xe_sriov_pf_control_sync_flr(struct xe_device *xe, unsigned int vfid)
 
 	return 0;
 }
+
+/**
+ * xe_sriov_pf_control_trigger_save_vf - Start a VF migration data SAVE sequence on all GTs.
+ * @xe: the &xe_device
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_sriov_pf_control_trigger_save_vf(struct xe_device *xe, unsigned int vfid)
+{
+	struct xe_gt *gt;
+	unsigned int id;
+	int ret;
+
+	for_each_gt(gt, xe, id) {
+		ret = xe_gt_sriov_pf_control_trigger_save_vf(gt, vfid);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * xe_sriov_pf_control_finish_save_vf - Complete a VF migration data SAVE sequence on all GTs.
+ * @xe: the &xe_device
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_sriov_pf_control_finish_save_vf(struct xe_device *xe, unsigned int vfid)
+{
+	struct xe_gt *gt;
+	unsigned int id;
+	int ret;
+
+	for_each_gt(gt, xe, id) {
+		ret = xe_gt_sriov_pf_control_finish_save_vf(gt, vfid);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+/**
+ * xe_sriov_pf_control_trigger_restore_vf - Start a VF migration data RESTORE sequence on all GTs.
+ * @xe: the &xe_device
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_sriov_pf_control_trigger_restore_vf(struct xe_device *xe, unsigned int vfid)
+{
+	struct xe_gt *gt;
+	unsigned int id;
+	int ret;
+
+	for_each_gt(gt, xe, id) {
+		ret = xe_gt_sriov_pf_control_trigger_restore_vf(gt, vfid);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
+/**
+ * xe_sriov_pf_control_wait_restore_vf - Complete a VF migration data RESTORE sequence in all GTs.
+ * @xe: the &xe_device
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_sriov_pf_control_finish_restore_vf(struct xe_device *xe, unsigned int vfid)
+{
+	struct xe_gt *gt;
+	unsigned int id;
+	int ret;
+
+	for_each_gt(gt, xe, id) {
+		ret = xe_gt_sriov_pf_control_finish_restore_vf(gt, vfid);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_control.h b/drivers/gpu/drm/xe/xe_sriov_pf_control.h
index 2d52d0ac1b28f..30318c1fba34e 100644
--- a/drivers/gpu/drm/xe/xe_sriov_pf_control.h
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_control.h
@@ -13,5 +13,9 @@ int xe_sriov_pf_control_resume_vf(struct xe_device *xe, unsigned int vfid);
 int xe_sriov_pf_control_stop_vf(struct xe_device *xe, unsigned int vfid);
 int xe_sriov_pf_control_reset_vf(struct xe_device *xe, unsigned int vfid);
 int xe_sriov_pf_control_sync_flr(struct xe_device *xe, unsigned int vfid);
+int xe_sriov_pf_control_trigger_save_vf(struct xe_device *xe, unsigned int vfid);
+int xe_sriov_pf_control_finish_save_vf(struct xe_device *xe, unsigned int vfid);
+int xe_sriov_pf_control_trigger_restore_vf(struct xe_device *xe, unsigned int vfid);
+int xe_sriov_pf_control_finish_restore_vf(struct xe_device *xe, unsigned int vfid);
 
 #endif
diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c b/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c
index a81aa05c55326..e0e6340c49106 100644
--- a/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c
@@ -136,11 +136,31 @@ static void pf_populate_pf(struct xe_device *xe, struct dentry *pfdent)
  *      │   │   ├── reset
  *      │   │   ├── resume
  *      │   │   ├── stop
+ *      │   │   ├── save
+ *      │   │   ├── restore
  *      │   │   :
  *      │   ├── vf2
  *      │   │   ├── ...
  */
 
+static int from_file_read_to_vf_call(struct seq_file *s,
+				     int (*call)(struct xe_device *, unsigned int))
+{
+	struct dentry *dent = file_dentry(s->file)->d_parent;
+	struct xe_device *xe = extract_xe(dent);
+	unsigned int vfid = extract_vfid(dent);
+	int ret;
+
+	xe_pm_runtime_get(xe);
+	ret = call(xe, vfid);
+	xe_pm_runtime_put(xe);
+
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
 static ssize_t from_file_write_to_vf_call(struct file *file, const char __user *userbuf,
 					  size_t count, loff_t *ppos,
 					  int (*call)(struct xe_device *, unsigned int))
@@ -179,10 +199,26 @@ static ssize_t OP##_write(struct file *file, const char __user *userbuf,	\
 }										\
 DEFINE_SHOW_STORE_ATTRIBUTE(OP)
 
+#define DEFINE_VF_CONTROL_ATTRIBUTE_RW(OP)					\
+static int OP##_show(struct seq_file *s, void *unused)				\
+{										\
+	return from_file_read_to_vf_call(s,					\
+					 xe_sriov_pf_control_finish_##OP);	\
+}										\
+static ssize_t OP##_write(struct file *file, const char __user *userbuf,	\
+			  size_t count, loff_t *ppos)				\
+{										\
+	return from_file_write_to_vf_call(file, userbuf, count, ppos,		\
+					  xe_sriov_pf_control_trigger_##OP);	\
+}										\
+DEFINE_SHOW_STORE_ATTRIBUTE(OP)
+
 DEFINE_VF_CONTROL_ATTRIBUTE(pause_vf);
 DEFINE_VF_CONTROL_ATTRIBUTE(resume_vf);
 DEFINE_VF_CONTROL_ATTRIBUTE(stop_vf);
 DEFINE_VF_CONTROL_ATTRIBUTE(reset_vf);
+DEFINE_VF_CONTROL_ATTRIBUTE_RW(save_vf);
+DEFINE_VF_CONTROL_ATTRIBUTE_RW(restore_vf);
 
 static void pf_populate_vf(struct xe_device *xe, struct dentry *vfdent)
 {
@@ -190,6 +226,8 @@ static void pf_populate_vf(struct xe_device *xe, struct dentry *vfdent)
 	debugfs_create_file("resume", 0200, vfdent, xe, &resume_vf_fops);
 	debugfs_create_file("stop", 0200, vfdent, xe, &stop_vf_fops);
 	debugfs_create_file("reset", 0200, vfdent, xe, &reset_vf_fops);
+	debugfs_create_file("save", 0600, vfdent, xe, &save_vf_fops);
+	debugfs_create_file("restore", 0600, vfdent, xe, &restore_vf_fops);
 }
 
 static void pf_populate_with_tiles(struct xe_device *xe, struct dentry *dent, unsigned int vfid)
-- 
2.51.2