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Message-ID: <20251021224133.577765-20-michal.winiarski@intel.com>
Date: Wed, 22 Oct 2025 00:41:26 +0200
From: Michał Winiarski <michal.winiarski@...el.com>
To: Alex Williamson <alex.williamson@...hat.com>, Lucas De Marchi
<lucas.demarchi@...el.com>, Thomas Hellström
<thomas.hellstrom@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>,
Jason Gunthorpe <jgg@...pe.ca>, Yishai Hadas <yishaih@...dia.com>, Kevin Tian
<kevin.tian@...el.com>, <intel-xe@...ts.freedesktop.org>,
<linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>, Matthew Brost
<matthew.brost@...el.com>, Michal Wajdeczko <michal.wajdeczko@...el.com>
CC: <dri-devel@...ts.freedesktop.org>, Jani Nikula
<jani.nikula@...ux.intel.com>, Joonas Lahtinen
<joonas.lahtinen@...ux.intel.com>, Tvrtko Ursulin <tursulin@...ulin.net>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, "Lukasz
Laguna" <lukasz.laguna@...el.com>, Michał Winiarski
<michal.winiarski@...el.com>
Subject: [PATCH v2 19/26] drm/xe/pf: Handle MMIO migration data as part of PF control
Connect the helpers to allow save and restore of MMIO migration data in
stop_copy / resume device state.
Signed-off-by: Michał Winiarski <michal.winiarski@...el.com>
---
drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c | 16 +++
.../gpu/drm/xe/xe_gt_sriov_pf_control_types.h | 2 +
drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c | 114 ++++++++++++++++++
drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h | 4 +
4 files changed, 136 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 f5c215fb93c5a..e7156ad3d1839 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c
@@ -190,6 +190,7 @@ static const char *control_bit_to_string(enum xe_gt_sriov_control_bits bit)
CASE2STR(SAVE_WAIT_DATA);
CASE2STR(SAVE_DATA_GUC);
CASE2STR(SAVE_DATA_GGTT);
+ CASE2STR(SAVE_DATA_MMIO);
CASE2STR(SAVE_DATA_DONE);
CASE2STR(SAVE_FAILED);
CASE2STR(SAVED);
@@ -829,6 +830,7 @@ 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_WAIT_DATA);
pf_escape_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_GUC);
pf_escape_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_GGTT);
+ pf_escape_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_MMIO);
pf_escape_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_DONE);
}
}
@@ -872,6 +874,17 @@ static int pf_handle_vf_save_data(struct xe_gt *gt, unsigned int vfid)
if (ret)
return ret;
}
+
+ pf_enter_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_MMIO);
+ return -EAGAIN;
+ }
+
+ if (pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_MMIO)) {
+ xe_gt_assert(gt, xe_gt_sriov_pf_migration_mmio_size(gt, vfid) > 0);
+
+ ret = xe_gt_sriov_pf_migration_mmio_save(gt, vfid);
+ if (ret)
+ return ret;
}
return 0;
@@ -1081,6 +1094,9 @@ pf_handle_vf_restore_data(struct xe_gt *gt, unsigned int vfid)
case XE_SRIOV_MIGRATION_DATA_TYPE_GGTT:
ret = xe_gt_sriov_pf_migration_ggtt_restore(gt, vfid, data);
break;
+ case XE_SRIOV_MIGRATION_DATA_TYPE_MMIO:
+ ret = xe_gt_sriov_pf_migration_mmio_restore(gt, vfid, data);
+ break;
case XE_SRIOV_MIGRATION_DATA_TYPE_GUC:
ret = xe_gt_sriov_pf_migration_guc_restore(gt, vfid, data);
break;
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 1e8fa3f8f9be8..9dfcebd5078ac 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
@@ -35,6 +35,7 @@
* @XE_GT_SRIOV_STATE_SAVE_WAIT_DATA: indicates that PF awaits for space in migration data ring.
* @XE_GT_SRIOV_STATE_SAVE_DATA_GUC: indicates PF needs to save VF GuC migration data.
* @XE_GT_SRIOV_STATE_SAVE_DATA_GGTT: indicates PF needs to save VF GGTT migration data.
+ * @XE_GT_SRIOV_STATE_SAVE_DATA_MMIO: indicates PF needs to save VF MMIO migration data.
* @XE_GT_SRIOV_STATE_SAVE_DATA_DONE: indicates that all migration data was produced by Xe.
* @XE_GT_SRIOV_STATE_SAVE_FAILED: indicates that VF save operation has failed.
* @XE_GT_SRIOV_STATE_SAVED: indicates that VF data is saved.
@@ -80,6 +81,7 @@ enum xe_gt_sriov_control_bits {
XE_GT_SRIOV_STATE_SAVE_WAIT_DATA,
XE_GT_SRIOV_STATE_SAVE_DATA_GUC,
XE_GT_SRIOV_STATE_SAVE_DATA_GGTT,
+ XE_GT_SRIOV_STATE_SAVE_DATA_MMIO,
XE_GT_SRIOV_STATE_SAVE_DATA_DONE,
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 75e965f75f6a7..41335b15ffdbe 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c
@@ -9,6 +9,7 @@
#include "xe_bo.h"
#include "xe_ggtt.h"
#include "xe_gt.h"
+#include "xe_gt_sriov_pf.h"
#include "xe_gt_sriov_pf_config.h"
#include "xe_gt_sriov_pf_control.h"
#include "xe_gt_sriov_pf_helpers.h"
@@ -378,6 +379,112 @@ int xe_gt_sriov_pf_migration_guc_restore(struct xe_gt *gt, unsigned int vfid,
return pf_restore_vf_guc_state(gt, vfid, data);
}
+/**
+ * xe_gt_sriov_pf_migration_mmio_size() - Get the size of VF MMIO migration data.
+ * @gt: the &xe_gt
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: size in bytes or a negative error code on failure.
+ */
+ssize_t xe_gt_sriov_pf_migration_mmio_size(struct xe_gt *gt, unsigned int vfid)
+{
+ return xe_gt_sriov_pf_mmio_vf_size(gt, vfid);
+}
+
+static int pf_save_vf_mmio_mig_data(struct xe_gt *gt, unsigned int vfid)
+{
+ struct xe_sriov_migration_data *data;
+ size_t size;
+ int ret;
+
+ size = xe_gt_sriov_pf_migration_mmio_size(gt, vfid);
+ if (size == 0)
+ return 0;
+
+ data = xe_sriov_migration_data_alloc(gt_to_xe(gt));
+ if (!data)
+ return -ENOMEM;
+
+ ret = xe_sriov_migration_data_init(data, gt->tile->id, gt->info.id,
+ XE_SRIOV_MIGRATION_DATA_TYPE_MMIO, 0, size);
+ if (ret)
+ goto fail;
+
+ ret = xe_gt_sriov_pf_mmio_vf_save(gt, vfid, data->vaddr, size);
+ if (ret)
+ goto fail;
+
+ pf_dump_mig_data(gt, vfid, data);
+
+ ret = xe_gt_sriov_pf_migration_save_produce(gt, vfid, data);
+ if (ret)
+ goto fail;
+
+ return 0;
+
+fail:
+ xe_sriov_migration_data_free(data);
+ xe_gt_sriov_err(gt, "Failed to save VF%u MMIO data (%pe)\n", vfid, ERR_PTR(ret));
+ return ret;
+}
+
+static int pf_restore_vf_mmio_mig_data(struct xe_gt *gt, unsigned int vfid,
+ struct xe_sriov_migration_data *data)
+{
+ int ret;
+
+ pf_dump_mig_data(gt, vfid, data);
+
+ ret = xe_gt_sriov_pf_mmio_vf_restore(gt, vfid, data->vaddr, data->size);
+ if (ret) {
+ xe_gt_sriov_err(gt, "Failed to restore VF%u MMIO data (%pe)\n",
+ vfid, ERR_PTR(ret));
+
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * xe_gt_sriov_pf_migration_mmio_save() - Save VF MMIO migration data.
+ * @gt: the &xe_gt
+ * @vfid: the VF identifier (can't be 0)
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_gt_sriov_pf_migration_mmio_save(struct xe_gt *gt, unsigned int vfid)
+{
+ xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
+ xe_gt_assert(gt, vfid != PFID);
+ xe_gt_assert(gt, vfid <= xe_sriov_pf_get_totalvfs(gt_to_xe(gt)));
+
+ return pf_save_vf_mmio_mig_data(gt, vfid);
+}
+
+/**
+ * xe_gt_sriov_pf_migration_mmio_restore() - Restore VF MMIO migration data.
+ * @gt: the &xe_gt
+ * @vfid: the VF identifier (can't be 0)
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_gt_sriov_pf_migration_mmio_restore(struct xe_gt *gt, unsigned int vfid,
+ struct xe_sriov_migration_data *data)
+{
+ xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
+ xe_gt_assert(gt, vfid != PFID);
+ xe_gt_assert(gt, vfid <= xe_sriov_pf_get_totalvfs(gt_to_xe(gt)));
+
+ return pf_restore_vf_mmio_mig_data(gt, vfid, data);
+}
+
/**
* xe_gt_sriov_pf_migration_size() - Total size of migration data from all components within a GT.
* @gt: the &xe_gt
@@ -408,6 +515,13 @@ ssize_t xe_gt_sriov_pf_migration_size(struct xe_gt *gt, unsigned int vfid)
size += sizeof(struct xe_sriov_pf_migration_hdr);
total += size;
+ size = xe_gt_sriov_pf_migration_mmio_size(gt, vfid);
+ if (size < 0)
+ return size;
+ else if (size > 0)
+ size += sizeof(struct xe_sriov_pf_migration_hdr);
+ total += size;
+
return total;
}
diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h
index 09abdd9e82e10..24a233c4cd0bb 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h
@@ -23,6 +23,10 @@ ssize_t xe_gt_sriov_pf_migration_ggtt_size(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_migration_ggtt_save(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_migration_ggtt_restore(struct xe_gt *gt, unsigned int vfid,
struct xe_sriov_migration_data *data);
+ssize_t xe_gt_sriov_pf_migration_mmio_size(struct xe_gt *gt, unsigned int vfid);
+int xe_gt_sriov_pf_migration_mmio_save(struct xe_gt *gt, unsigned int vfid);
+int xe_gt_sriov_pf_migration_mmio_restore(struct xe_gt *gt, unsigned int vfid,
+ struct xe_sriov_migration_data *data);
ssize_t xe_gt_sriov_pf_migration_size(struct xe_gt *gt, unsigned int vfid);
--
2.50.1
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