[PATCH 16/26] drm/xe/pf: Handle GuC migration data as part of PF control

Michał Winiarski
2025-10-11T19:41:30Z

Connect the helpers to allow save and restore of GuC migration data in
stop_copy / resume device state.

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
---
drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c | 28 ++++++++++++++++++-
.../gpu/drm/xe/xe_gt_sriov_pf_control_types.h | 1 +
drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c | 8 ++++++
3 files changed, 36 insertions(+), 1 deletion(-)

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 6ece775b2e80e..f73a3bf40037c 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c
@@ -187,6 +187,7 @@ static const char *control_bit_to_string(enum xe_gt_sriov_control_bits bit)
CASE2STR(PAUSED);
CASE2STR(MIGRATION_DATA_WIP);
CASE2STR(SAVE_WIP);
+ CASE2STR(SAVE_DATA_GUC);
CASE2STR(SAVE_FAILED);
CASE2STR(SAVED);
CASE2STR(RESTORE_WIP);
@@ -338,6 +339,7 @@ static void pf_exit_vf_mismatch(struct xe_gt *gt, unsigned int vfid)
pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_STOP_FAILED);
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_SAVE_FAILED);
pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_FLR_FAILED);
}

@@ -801,6 +803,7 @@ void xe_gt_sriov_pf_control_vf_data_eof(struct xe_gt *gt, unsigned int vfid)

static void pf_exit_vf_save_wip(struct xe_gt *gt, unsigned int vfid)
{
+ pf_escape_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_GUC);
pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_WIP);
}

@@ -820,16 +823,35 @@ 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 void pf_enter_vf_save_failed(struct xe_gt *gt, unsigned int vfid)
+{
+ pf_enter_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_FAILED);
+ pf_exit_vf_wip(gt, vfid);
+}
+
static bool pf_handle_vf_save_wip(struct xe_gt *gt, unsigned int vfid)
{
+ int ret;
+
if (!pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_WIP))
return false;

+ if (pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_GUC)) {
+ ret = xe_gt_sriov_pf_migration_guc_save(gt, vfid);
+ if (ret)
+ goto err;
+ return true;
+ }
+
xe_gt_sriov_pf_control_vf_data_eof(gt, vfid);
pf_exit_vf_save_wip(gt, vfid);
pf_enter_vf_saved(gt, vfid);

return true;
+
+err:
+ pf_enter_vf_save_failed(gt, vfid);
+ return false;
}

static bool pf_enter_vf_save_wip(struct xe_gt *gt, unsigned int vfid)
@@ -838,6 +860,8 @@ static bool pf_enter_vf_save_wip(struct xe_gt *gt, unsigned int vfid)
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);
+ if (xe_gt_sriov_pf_migration_guc_size(gt, vfid) > 0)
+ pf_enter_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_GUC);
pf_queue_vf(gt, vfid);
return true;
}
@@ -946,6 +970,8 @@ static int pf_handle_vf_restore_data(struct xe_gt *gt, unsigned int vfid,
struct xe_sriov_pf_migration_data *data)
{
switch (data->type) {
+ case XE_SRIOV_MIG_DATA_GUC:
+ return xe_gt_sriov_pf_migration_guc_restore(gt, vfid, data);
default:
xe_gt_sriov_notice(gt, "Skipping VF%u invalid data type: %d\n", vfid, data->type);
pf_enter_vf_restore_failed(gt, vfid);
@@ -996,7 +1022,7 @@ static bool pf_enter_vf_restore_wip(struct xe_gt *gt, unsigned int vfid)
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);
+ pf_queue_vf(gt, vfid);
return true;
}

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 68ec9d1fc3daf..b9787c425d9f6 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
@@ -71,6 +71,7 @@ enum xe_gt_sriov_control_bits {
XE_GT_SRIOV_STATE_MIGRATION_DATA_WIP,

XE_GT_SRIOV_STATE_SAVE_WIP,
+ XE_GT_SRIOV_STATE_SAVE_DATA_GUC,
XE_GT_SRIOV_STATE_SAVE_FAILED,
XE_GT_SRIOV_STATE_SAVED,

diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c
index e1031465e65c4..0c10284f0b09a 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c
@@ -279,9 +279,17 @@ int xe_gt_sriov_pf_migration_guc_restore(struct xe_gt *gt, unsigned int vfid,
ssize_t xe_gt_sriov_pf_migration_size(struct xe_gt *gt, unsigned int vfid)
{
ssize_t total = 0;
+ ssize_t size;

xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));

+ size = xe_gt_sriov_pf_migration_guc_size(gt, vfid);
+ if (size < 0)
+ return size;
+ else if (size > 0)
+ size += sizeof(struct xe_sriov_pf_migration_hdr);
+ total += size;
+
return total;
}

--
2.50.1