[PATCH 03/26] drm/xe/pf: Add save/restore control state stubs and connect to debugfs

Michał Winiarski
2025-10-11T19:40:30Z

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>
---
drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c | 270 ++++++++++++++++++
drivers/gpu/drm/xe/xe_gt_sriov_pf_control.h | 6 +
.../gpu/drm/xe/xe_gt_sriov_pf_control_types.h | 17 ++
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, 431 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 2e6bd3d1fe1da..44df984278548 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 +184,13 @@ static const char *control_bit_to_string(enum xe_gt_sriov_control_bits bit)
CASE2STR(PAUSE_SAVE_GUC);
CASE2STR(PAUSE_FAILED);
CASE2STR(PAUSED);
+ CASE2STR(MIGRATION_DATA_WIP);
+ 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);
@@ -207,6 +214,8 @@ static unsigned long pf_get_default_timeout(enum xe_gt_sriov_control_bits bit)
return HZ / 2;
case XE_GT_SRIOV_STATE_FLR_WIP:
case XE_GT_SRIOV_STATE_FLR_RESET_CONFIG:
+ case XE_GT_SRIOV_STATE_SAVE_WIP:
+ case XE_GT_SRIOV_STATE_RESTORE_WIP:
return 5 * HZ;
default:
return HZ;
@@ -359,6 +368,10 @@ 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_saved(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_restored(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 +393,8 @@ 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 +414,8 @@ 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_saved(gt, vfid);
+ pf_exit_vf_restored(gt, vfid);
pf_exit_vf_mismatch(gt, vfid);
pf_exit_vf_wip(gt, vfid);
}
@@ -675,6 +692,8 @@ 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_saved(gt, vfid);
+ pf_exit_vf_restored(gt, vfid);
pf_exit_vf_mismatch(gt, vfid);
pf_exit_vf_wip(gt, vfid);
}
@@ -776,6 +795,249 @@ int xe_gt_sriov_pf_control_resume_vf(struct xe_gt *gt, unsigned int vfid)
return -ECANCELED;
}

+/**
+ * xe_gt_sriov_pf_control_check_vf_data_wip - check if new SR-IOV VF migration data is expected
+ * @gt: the &struct xe_gt
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: true when new migration data is expected to be produced, false otherwise
+ */
+bool xe_gt_sriov_pf_control_check_vf_data_wip(struct xe_gt *gt, unsigned int vfid)
+{
+ return pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_MIGRATION_DATA_WIP);
+}
+
+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_info(gt, "VF%u saved!\n", vfid);
+
+ pf_exit_vf_mismatch(gt, vfid);
+ pf_exit_vf_wip(gt, vfid);
+}
+
+static void pf_exit_vf_saved(struct xe_gt *gt, unsigned int vfid)
+{
+ pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVED);
+}
+
+static bool pf_handle_vf_save_wip(struct xe_gt *gt, unsigned int vfid)
+{
+ if (!pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_WIP))
+ return false;
+
+ pf_exit_vf_save_wip(gt, vfid);
+ 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_state(gt, vfid, XE_GT_SRIOV_STATE_MIGRATION_DATA_WIP);
+ pf_exit_vf_restored(gt, vfid);
+ pf_enter_vf_wip(gt, vfid);
+ pf_queue_vf(gt, vfid);
+ return true;
+ }
+
+ return false;
+}
+
+/**
+ * xe_gt_sriov_pf_control_save_vf - Save SR-IOV VF migration data.
+ * @gt: the &struct 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_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 -EPERM;
+ }
+
+ 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;
+}
+
+static int pf_wait_vf_save_done(struct xe_gt *gt, unsigned int vfid)
+{
+ unsigned long timeout = pf_get_default_timeout(XE_GT_SRIOV_STATE_SAVE_WIP);
+ int err;
+
+ err = pf_wait_vf_wip_done(gt, vfid, timeout);
+ if (err) {
+ xe_gt_sriov_notice(gt, "VF%u SAVE 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_SAVE_FAILED))
+ return -EIO;
+
+ return 0;
+}
+
+/**
+ * xe_gt_sriov_pf_control_wait_save_done() - Wait for a VF Save to complete
+ * @gt: the &struct 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_wait_save_done(struct xe_gt *gt, unsigned int vfid)
+{
+ if (!pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_WIP))
+ return 0;
+
+ return pf_wait_vf_save_done(gt, vfid);
+}
+
+static void pf_exit_vf_restore_wip(struct xe_gt *gt, unsigned int vfid)
+{
+ pf_expect_vf_not_state(gt, vfid, XE_GT_SRIOV_STATE_MIGRATION_DATA_WIP);
+ 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_info(gt, "VF%u restored!\n", vfid);
+
+ pf_exit_vf_mismatch(gt, vfid);
+ pf_exit_vf_wip(gt, vfid);
+}
+
+static void pf_exit_vf_restored(struct xe_gt *gt, unsigned int vfid)
+{
+ pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORED);
+}
+
+static bool pf_handle_vf_restore_wip(struct xe_gt *gt, unsigned int vfid)
+{
+ if (!pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_WIP))
+ return false;
+
+ pf_exit_vf_restore_wip(gt, vfid);
+ 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_state(gt, vfid, XE_GT_SRIOV_STATE_MIGRATION_DATA_WIP);
+ pf_exit_vf_saved(gt, vfid);
+ pf_enter_vf_wip(gt, vfid);
+ pf_enter_vf_restored(gt, vfid);
+ return true;
+ }
+
+ return false;
+}
+
+/**
+ * xe_gt_sriov_pf_control_restore_vf - Restore SR-IOV VF migration data.
+ * @gt: the &struct 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_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 -EPERM;
+ }
+
+ 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_wait_restore_done() - Wait for a VF Restore to complete
+ * @gt: the &struct 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_wait_restore_done(struct xe_gt *gt, unsigned int vfid)
+{
+ if (!pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_RESTORE_WIP))
+ return 0;
+
+ return pf_wait_vf_restore_done(gt, vfid);
+}
+
/**
* DOC: The VF STOP state machine
*
@@ -817,6 +1079,8 @@ 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_saved(gt, vfid);
+ pf_exit_vf_restored(gt, vfid);
pf_exit_vf_mismatch(gt, vfid);
pf_exit_vf_wip(gt, vfid);
}
@@ -1461,6 +1725,12 @@ 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_wip(gt, vfid))
+ return true;
+
+ if (pf_handle_vf_restore_wip(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..2e121e8132dcf 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.h
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.h
@@ -14,8 +14,14 @@ struct xe_gt;
int xe_gt_sriov_pf_control_init(struct xe_gt *gt);
void xe_gt_sriov_pf_control_restart(struct xe_gt *gt);

+bool xe_gt_sriov_pf_control_check_vf_data_wip(struct xe_gt *gt, unsigned int vfid);
+
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_save_vf(struct xe_gt *gt, unsigned int vfid);
+int xe_gt_sriov_pf_control_wait_save_done(struct xe_gt *gt, unsigned int vfid);
+int xe_gt_sriov_pf_control_restore_vf(struct xe_gt *gt, unsigned int vfid);
+int xe_gt_sriov_pf_control_wait_restore_done(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 c80b7e77f1ad2..02b517533ee8a 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 +31,13 @@
* @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_MIGRATION_DATA_WIP: indicates that the new data is expected in migration ring.
+ * @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 is saved.
+ * @XE_GT_SRIOV_STATE_RESTORE_WIP: indicates that VF restore operation is in progress.
+ * @XE_GT_SRIOV_STATE_SAVE_FAILED: indicates that VF restore operation has failed.
+ * @XE_GT_SRIOV_STATE_SAVED: indicates that VF 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 +70,16 @@ enum xe_gt_sriov_control_bits {
XE_GT_SRIOV_STATE_PAUSE_FAILED,
XE_GT_SRIOV_STATE_PAUSED,

+ XE_GT_SRIOV_STATE_MIGRATION_DATA_WIP,
+
+ 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..e64c7b56172c6 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_save_vf - Save VF migration data 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_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_save_vf(gt, vfid);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * xe_sriov_pf_control_wait_save_vf - Wait until VF migration data was saved 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_wait_save_vf(struct xe_device *xe, unsigned int vfid)
+{
+ struct xe_gt *gt;
+ u8 id;
+ int ret;
+
+ for_each_gt(gt, xe, id) {
+ ret = xe_gt_sriov_pf_control_wait_save_done(gt, vfid);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+/**
+ * xe_sriov_pf_control_restore_vf - Restore VF migration data 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_restore_vf(struct xe_device *xe, unsigned int vfid)
+{
+ struct xe_gt *gt;
+ u8 id;
+ int ret;
+
+ for_each_gt(gt, xe, id) {
+ ret = xe_gt_sriov_pf_control_restore_vf(gt, vfid);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+/**
+ * xe_sriov_pf_control_wait_save_vf - Wait until VF migration data was restored 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_wait_restore_vf(struct xe_device *xe, unsigned int vfid)
+{
+ struct xe_gt *gt;
+ u8 id;
+ int ret;
+
+ for_each_gt(gt, xe, id) {
+ ret = xe_gt_sriov_pf_control_wait_restore_done(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..512fd21d87c1e 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_save_vf(struct xe_device *xe, unsigned int vfid);
+int xe_sriov_pf_control_wait_save_vf(struct xe_device *xe, unsigned int vfid);
+int xe_sriov_pf_control_restore_vf(struct xe_device *xe, unsigned int vfid);
+int xe_sriov_pf_control_wait_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 97636ed86fb8b..74eeabef91c57 100644
--- a/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c
@@ -75,11 +75,31 @@ 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 s->count;
+}
+
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))
@@ -118,10 +138,26 @@ static ssize_t OP##_write(struct file *file, const char __user *userbuf, \
} \
DEFINE_SHOW_STORE_ATTRIBUTE(OP)

+#define DEFINE_VF_RW_CONTROL_ATTRIBUTE(OP) \
+static int OP##_show(struct seq_file *s, void *unused) \
+{ \
+ return from_file_read_to_vf_call(s, \
+ xe_sriov_pf_control_wait_##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_##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_RW_CONTROL_ATTRIBUTE(save_vf);
+DEFINE_VF_RW_CONTROL_ATTRIBUTE(restore_vf);

static void pf_populate_vf(struct xe_device *xe, struct dentry *vfdent)
{
@@ -129,6 +165,8 @@ 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)
--
2.50.1