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Tue, 21 Oct 2025 22:43:30 +0000 From: =?UTF-8?q?Micha=C5=82=20Winiarski?= To: Alex Williamson , Lucas De Marchi , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , Rodrigo Vivi , Jason Gunthorpe , Yishai Hadas , Kevin Tian , , , , Matthew Brost , Michal Wajdeczko CC: , Jani Nikula , Joonas Lahtinen , Tvrtko Ursulin , David Airlie , Simona Vetter , "Lukasz Laguna" , =?UTF-8?q?Micha=C5=82=20Winiarski?= Subject: [PATCH v2 17/26] drm/xe/pf: Handle GGTT migration data as part of PF control Date: Wed, 22 Oct 2025 00:41:24 +0200 Message-ID: <20251021224133.577765-18-michal.winiarski@intel.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20251021224133.577765-1-michal.winiarski@intel.com> References: <20251021224133.577765-1-michal.winiarski@intel.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: VI1PR0102CA0092.eurprd01.prod.exchangelabs.com (2603:10a6:803:15::33) To DM4PR11MB5373.namprd11.prod.outlook.com (2603:10b6:5:394::7) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR11MB5373:EE_|DM3PPFF28037229:EE_ X-MS-Office365-Filtering-Correlation-Id: da23adb0-a4ce-4133-f124-08de10f3419f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|7416014|376014|1800799024|921020; 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Signed-off-by: Micha=C5=82 Winiarski --- 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 | 118 ++++++++++++++++++ drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h | 4 + 4 files changed, 140 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 18f6e3028d4f0..f5c215fb93c5a 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c @@ -189,6 +189,7 @@ static const char *control_bit_to_string(enum xe_gt_sri= ov_control_bits bit) CASE2STR(SAVE_PROCESS_DATA); CASE2STR(SAVE_WAIT_DATA); CASE2STR(SAVE_DATA_GUC); + CASE2STR(SAVE_DATA_GGTT); CASE2STR(SAVE_DATA_DONE); CASE2STR(SAVE_FAILED); CASE2STR(SAVED); @@ -827,6 +828,7 @@ static void pf_exit_vf_save_wip(struct xe_gt *gt, unsig= ned int vfid) pf_escape_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_PROCESS_DATA); 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_DONE); } } @@ -859,6 +861,17 @@ static int pf_handle_vf_save_data(struct xe_gt *gt, un= signed int vfid) ret =3D xe_gt_sriov_pf_migration_guc_save(gt, vfid); if (ret) return ret; + + pf_enter_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_GGTT); + return -EAGAIN; + } + + if (pf_exit_vf_state(gt, vfid, XE_GT_SRIOV_STATE_SAVE_DATA_GGTT)) { + if (xe_gt_sriov_pf_migration_ggtt_size(gt, vfid) > 0) { + ret =3D xe_gt_sriov_pf_migration_ggtt_save(gt, vfid); + if (ret) + return ret; + } } =20 return 0; @@ -1065,6 +1078,9 @@ pf_handle_vf_restore_data(struct xe_gt *gt, unsigned = int vfid) xe_gt_assert(gt, data); =20 switch (data->type) { + case XE_SRIOV_MIGRATION_DATA_TYPE_GGTT: + ret =3D xe_gt_sriov_pf_migration_ggtt_restore(gt, vfid, data); + break; case XE_SRIOV_MIGRATION_DATA_TYPE_GUC: ret =3D 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/gp= u/drm/xe/xe_gt_sriov_pf_control_types.h index 8b951ee8a24fe..1e8fa3f8f9be8 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 @@ -34,6 +34,7 @@ * @XE_GT_SRIOV_STATE_SAVE_PROCESS_DATA: indicates that VF migration data = is being produced. * @XE_GT_SRIOV_STATE_SAVE_WAIT_DATA: indicates that PF awaits for space i= n migration data ring. * @XE_GT_SRIOV_STATE_SAVE_DATA_GUC: indicates PF needs to save VF GuC mig= ration data. + * @XE_GT_SRIOV_STATE_SAVE_DATA_GGTT: indicates PF needs to save VF GGTT m= igration data. * @XE_GT_SRIOV_STATE_SAVE_DATA_DONE: indicates that all migration data wa= s produced by Xe. * @XE_GT_SRIOV_STATE_SAVE_FAILED: indicates that VF save operation has fa= iled. * @XE_GT_SRIOV_STATE_SAVED: indicates that VF data is saved. @@ -78,6 +79,7 @@ enum xe_gt_sriov_control_bits { XE_GT_SRIOV_STATE_SAVE_PROCESS_DATA, 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_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/dr= m/xe/xe_gt_sriov_pf_migration.c index 594178fbe36d0..75e965f75f6a7 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c @@ -7,6 +7,9 @@ =20 #include "abi/guc_actions_sriov_abi.h" #include "xe_bo.h" +#include "xe_ggtt.h" +#include "xe_gt.h" +#include "xe_gt_sriov_pf_config.h" #include "xe_gt_sriov_pf_control.h" #include "xe_gt_sriov_pf_helpers.h" #include "xe_gt_sriov_pf_migration.h" @@ -37,6 +40,114 @@ static void pf_dump_mig_data(struct xe_gt *gt, unsigned= int vfid, } } =20 +/** + * xe_gt_sriov_pf_migration_ggtt_size() - Get the size of VF GGTT migratio= n 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_ggtt_size(struct xe_gt *gt, unsigned int = vfid) +{ + if (!xe_gt_is_main_type(gt)) + return 0; + + return xe_ggtt_pte_size(gt->tile->mem.ggtt, xe_gt_sriov_pf_config_get_ggt= t(gt, vfid)); +} + +static int pf_save_vf_ggtt_mig_data(struct xe_gt *gt, unsigned int vfid) +{ + struct xe_sriov_migration_data *data; + size_t size; + int ret; + + size =3D xe_gt_sriov_pf_migration_ggtt_size(gt, vfid); + if (size =3D=3D 0) + return 0; + + data =3D xe_sriov_migration_data_alloc(gt_to_xe(gt)); + if (!data) + return -ENOMEM; + + ret =3D xe_sriov_migration_data_init(data, gt->tile->id, gt->info.id, + XE_SRIOV_MIGRATION_DATA_TYPE_GGTT, 0, size); + if (ret) + goto fail; + + ret =3D xe_gt_sriov_pf_config_ggtt_save(gt, vfid, data->vaddr, size); + if (ret) + goto fail; + + pf_dump_mig_data(gt, vfid, data); + + ret =3D 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 GGTT data (%pe)\n", vfid, ERR_PT= R(ret)); + return ret; +} + +static int pf_restore_vf_ggtt_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 =3D xe_gt_sriov_pf_config_ggtt_restore(gt, vfid, data->vaddr, data->s= ize); + if (ret) { + xe_gt_sriov_err(gt, "Failed to restore VF%u GGTT data (%pe)\n", + vfid, ERR_PTR(ret)); + return ret; + } + + return 0; +} + +/** + * xe_gt_sriov_pf_migration_ggtt_save() - Save VF GGTT 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_ggtt_save(struct xe_gt *gt, unsigned int vfid) +{ + xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt))); + xe_gt_assert(gt, vfid !=3D PFID); + xe_gt_assert(gt, vfid <=3D xe_sriov_pf_get_totalvfs(gt_to_xe(gt))); + + return pf_save_vf_ggtt_mig_data(gt, vfid); +} + +/** + * xe_gt_sriov_pf_migration_ggtt_restore() - Restore VF GGTT migration dat= a. + * @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_ggtt_restore(struct xe_gt *gt, unsigned int v= fid, + struct xe_sriov_migration_data *data) +{ + xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt))); + xe_gt_assert(gt, vfid !=3D PFID); + xe_gt_assert(gt, vfid <=3D xe_sriov_pf_get_totalvfs(gt_to_xe(gt))); + + return pf_restore_vf_ggtt_mig_data(gt, vfid, data); +} + /* Return: number of dwords saved/restored/required or a negative error co= de on failure */ static int guc_action_vf_save_restore(struct xe_guc *guc, u32 vfid, u32 op= code, u64 addr, u32 ndwords) @@ -290,6 +401,13 @@ ssize_t xe_gt_sriov_pf_migration_size(struct xe_gt *gt= , unsigned int vfid) size +=3D sizeof(struct xe_sriov_pf_migration_hdr); total +=3D size; =20 + size =3D xe_gt_sriov_pf_migration_ggtt_size(gt, vfid); + if (size < 0) + return size; + else if (size > 0) + size +=3D sizeof(struct xe_sriov_pf_migration_hdr); + total +=3D size; + return total; } =20 diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h b/drivers/gpu/dr= m/xe/xe_gt_sriov_pf_migration.h index b3c18e369df79..09abdd9e82e10 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h @@ -19,6 +19,10 @@ ssize_t xe_gt_sriov_pf_migration_guc_size(struct xe_gt *= gt, unsigned int vfid); int xe_gt_sriov_pf_migration_guc_save(struct xe_gt *gt, unsigned int vfid); int xe_gt_sriov_pf_migration_guc_restore(struct xe_gt *gt, unsigned int vf= id, struct xe_sriov_migration_data *data); +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 v= fid, + struct xe_sriov_migration_data *data); =20 ssize_t xe_gt_sriov_pf_migration_size(struct xe_gt *gt, unsigned int vfid); =20 --=20 2.50.1