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drm/xe/vf: Start post-migration fixups with provisioning query

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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: Tomasz Lis <tomasz.lis@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241104213449.1455694-5-tomasz.lis@intel.com
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
This commit is contained in:
Tomasz Lis
2024-11-04 22:34:48 +01:00
committed by Michal Wajdeczko
parent 1255954d9f
commit 4be3fca2ce
1 changed files with 36 additions and 0 deletions
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36
drivers/gpu/drm/xe/xe_sriov_vf.c
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@@ -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)