Commit 4be3fca2 authored by Tomasz Lis's avatar Tomasz Lis Committed by Michal Wajdeczko
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drm/xe/vf: Start post-migration fixups with provisioning query 



During post-migration recovery, only MMIO communication to GuC is
allowed. The VF KMD needs to use that channel to ask for the new
provisioning, which includes a new GGTT range assigned to the VF.

v2: query config only instead of handshake; no need to get pm ref as
 it's now kept through whole recovery (Michal)
v3: switched names of 'err' and 'ret'  (Michal)

Signed-off-by: default avatarTomasz Lis <tomasz.lis@intel.com>
Reviewed-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241104213449.1455694-5-tomasz.lis@intel.com


Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
parent 1255954d

drivers/gpu/drm/xe/xe_sriov_vf.c

+36 −0
Original line number Diff line number Diff line
@@ -132,6 +132,31 @@ void xe_sriov_vf_init_early(struct xe_device *xe) 
	INIT_WORK(&xe->sriov.vf.migration.worker, migration_worker_func);

}



/**

 * vf_post_migration_requery_guc - Re-query GuC for current VF provisioning.

 * @xe: the &xe_device struct instance

 *

 * After migration, we need to re-query all VF configuration to make sure

 * they match previous provisioning. Note that most of VF provisioning

 * shall be the same, except GGTT range, since GGTT is not virtualized per-VF.

 *

 * Returns: 0 if the operation completed successfully, or a negative error

 * code otherwise.

 */

static int vf_post_migration_requery_guc(struct xe_device *xe)

{

	struct xe_gt *gt;

	unsigned int id;

	int err, ret = 0;



	for_each_gt(gt, xe, id) {

		err = xe_gt_sriov_vf_query_config(gt);

		ret = ret ?: err;

	}



	return ret;

}



/*

 * Notify all GuCs about resource fixups apply finished.

 */
@@ -147,12 +172,23 @@ static void vf_post_migration_notify_resfix_done(struct xe_device *xe) 


static void vf_post_migration_recovery(struct xe_device *xe)

{

	int err;



	drm_dbg(&xe->drm, "migration recovery in progress\n");

	xe_pm_runtime_get(xe);

	err = vf_post_migration_requery_guc(xe);

	if (unlikely(err))

		goto fail;



	/* FIXME: add the recovery steps */

	vf_post_migration_notify_resfix_done(xe);

	xe_pm_runtime_put(xe);

	drm_notice(&xe->drm, "migration recovery ended\n");

	return;

fail:

	xe_pm_runtime_put(xe);

	drm_err(&xe->drm, "migration recovery failed (%pe)\n", ERR_PTR(err));

	xe_device_declare_wedged(xe);

}



static void migration_worker_func(struct work_struct *w)