From patchwork Tue Nov 21 02:51:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cao, Yahui" X-Patchwork-Id: 13462469 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="H1Y/EjXg" Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C69BE8; Mon, 20 Nov 2023 18:50:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700535021; x=1732071021; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GEBquv8g8svvSh4MvuUqEVBc8Cbfc2Qs0nRwb8PM+JM=; b=H1Y/EjXgRxu1hoWwojREr9T3vkkT/AO/hTVANqDkQz7/VaTxD0MmGuwL pxj9IiuJ9Gk+G5BhmnwS2M+YNZBup+fg7uEv4bfsfB5LLRPxRE+Hydz/N 6mUJ90anZJrS9SAzRM5p4VAgqTZcB5hAApuR1KMhJqIajQsh8kQcOGe/S D7kYPf5EqmnxTes6vwBiUASwUI6x9kHo2u31xgLajrjFA/X/5RJC9Zk/m VE20JQRcRL66D3pKWRf44Byc7mbWVWGClRQrunlkogoyVmFAWvVExE1or iEdaskTno+Nf1pAQ/qEvl52xTbufJgs0seVX4xgpftsGbu7iPG5hSXEiw Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10900"; a="458245942" X-IronPort-AV: E=Sophos;i="6.04,215,1695711600"; d="scan'208";a="458245942" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Nov 2023 18:50:03 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10900"; a="832488388" X-IronPort-AV: E=Sophos;i="6.04,215,1695711600"; d="scan'208";a="832488388" Received: from dpdk-yahui-icx1.sh.intel.com ([10.67.111.85]) by fmsmga008.fm.intel.com with ESMTP; 20 Nov 2023 18:49:58 -0800 From: Yahui Cao To: intel-wired-lan@lists.osuosl.org Cc: kvm@vger.kernel.org, netdev@vger.kernel.org, lingyu.liu@intel.com, kevin.tian@intel.com, madhu.chittim@intel.com, sridhar.samudrala@intel.com, alex.williamson@redhat.com, jgg@nvidia.com, yishaih@nvidia.com, shameerali.kolothum.thodi@huawei.com, brett.creeley@amd.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Subject: [PATCH iwl-next v4 04/12] ice: Add fundamental migration init and exit function Date: Tue, 21 Nov 2023 02:51:03 +0000 Message-Id: <20231121025111.257597-5-yahui.cao@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231121025111.257597-1-yahui.cao@intel.com> References: <20231121025111.257597-1-yahui.cao@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Lingyu Liu Add basic entry point for live migration functionality initialization, uninitialization and add helper function for vfio driver to reach pf driver data. Signed-off-by: Lingyu Liu Reviewed-by: Michal Swiatkowski Signed-off-by: Yahui Cao --- drivers/net/ethernet/intel/ice/Makefile | 1 + drivers/net/ethernet/intel/ice/ice.h | 3 + drivers/net/ethernet/intel/ice/ice_main.c | 15 ++++ .../net/ethernet/intel/ice/ice_migration.c | 82 +++++++++++++++++++ .../intel/ice/ice_migration_private.h | 21 +++++ drivers/net/ethernet/intel/ice/ice_vf_lib.c | 4 + drivers/net/ethernet/intel/ice/ice_vf_lib.h | 2 + include/linux/net/intel/ice_migration.h | 27 ++++++ 8 files changed, 155 insertions(+) create mode 100644 drivers/net/ethernet/intel/ice/ice_migration.c create mode 100644 drivers/net/ethernet/intel/ice/ice_migration_private.h create mode 100644 include/linux/net/intel/ice_migration.h diff --git a/drivers/net/ethernet/intel/ice/Makefile b/drivers/net/ethernet/intel/ice/Makefile index 0679907980f7..c536a9a896c0 100644 --- a/drivers/net/ethernet/intel/ice/Makefile +++ b/drivers/net/ethernet/intel/ice/Makefile @@ -49,3 +49,4 @@ ice-$(CONFIG_RFS_ACCEL) += ice_arfs.o ice-$(CONFIG_XDP_SOCKETS) += ice_xsk.o ice-$(CONFIG_ICE_SWITCHDEV) += ice_eswitch.o ice_eswitch_br.o ice-$(CONFIG_GNSS) += ice_gnss.o +ice-$(CONFIG_ICE_VFIO_PCI) += ice_migration.o diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h index 351e0d36df44..13f6ce51985c 100644 --- a/drivers/net/ethernet/intel/ice/ice.h +++ b/drivers/net/ethernet/intel/ice/ice.h @@ -55,6 +55,7 @@ #include #include #include +#include #include "ice_devids.h" #include "ice_type.h" #include "ice_txrx.h" @@ -77,6 +78,7 @@ #include "ice_gnss.h" #include "ice_irq.h" #include "ice_dpll.h" +#include "ice_migration_private.h" #define ICE_BAR0 0 #define ICE_REQ_DESC_MULTIPLE 32 @@ -963,6 +965,7 @@ void ice_service_task_schedule(struct ice_pf *pf); int ice_load(struct ice_pf *pf); void ice_unload(struct ice_pf *pf); void ice_adv_lnk_speed_maps_init(void); +struct ice_pf *ice_get_pf_from_vf_pdev(struct pci_dev *pdev); /** * ice_set_rdma_cap - enable RDMA support diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c index 6607fa6fe556..2daa4d2b1dd1 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -9313,3 +9313,18 @@ static const struct net_device_ops ice_netdev_ops = { .ndo_xdp_xmit = ice_xdp_xmit, .ndo_xsk_wakeup = ice_xsk_wakeup, }; + +/** + * ice_get_pf_from_vf_pdev - Get PF structure from PCI device + * @pdev: pointer to PCI device + * + * Return pointer to ice PF structure, NULL for failure + */ +struct ice_pf *ice_get_pf_from_vf_pdev(struct pci_dev *pdev) +{ + struct ice_pf *pf; + + pf = pci_iov_get_pf_drvdata(pdev, &ice_driver); + + return !IS_ERR(pf) ? pf : NULL; +} diff --git a/drivers/net/ethernet/intel/ice/ice_migration.c b/drivers/net/ethernet/intel/ice/ice_migration.c new file mode 100644 index 000000000000..2b9b5a2ce367 --- /dev/null +++ b/drivers/net/ethernet/intel/ice/ice_migration.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) 2018-2023 Intel Corporation */ + +#include "ice.h" + +/** + * ice_migration_get_pf - Get ice PF structure pointer by pdev + * @pdev: pointer to ice vfio pci VF pdev structure + * + * Return nonzero for success, NULL for failure. + */ +struct ice_pf *ice_migration_get_pf(struct pci_dev *pdev) +{ + return ice_get_pf_from_vf_pdev(pdev); +} +EXPORT_SYMBOL(ice_migration_get_pf); + +/** + * ice_migration_init_vf - init ice VF device state data + * @vf: pointer to VF + */ +void ice_migration_init_vf(struct ice_vf *vf) +{ + vf->migration_enabled = true; +} + +/** + * ice_migration_uninit_vf - uninit VF device state data + * @vf: pointer to VF + */ +void ice_migration_uninit_vf(struct ice_vf *vf) +{ + if (!vf->migration_enabled) + return; + + vf->migration_enabled = false; +} + +/** + * ice_migration_init_dev - init ice migration device + * @pf: pointer to PF of migration device + * @vf_id: VF index of migration device + * + * Return 0 for success, negative for failure + */ +int ice_migration_init_dev(struct ice_pf *pf, int vf_id) +{ + struct device *dev = ice_pf_to_dev(pf); + struct ice_vf *vf; + + vf = ice_get_vf_by_id(pf, vf_id); + if (!vf) { + dev_err(dev, "Unable to locate VF from VF ID%d\n", vf_id); + return -EINVAL; + } + + ice_migration_init_vf(vf); + ice_put_vf(vf); + return 0; +} +EXPORT_SYMBOL(ice_migration_init_dev); + +/** + * ice_migration_uninit_dev - uninit ice migration device + * @pf: pointer to PF of migration device + * @vf_id: VF index of migration device + */ +void ice_migration_uninit_dev(struct ice_pf *pf, int vf_id) +{ + struct device *dev = ice_pf_to_dev(pf); + struct ice_vf *vf; + + vf = ice_get_vf_by_id(pf, vf_id); + if (!vf) { + dev_err(dev, "Unable to locate VF from VF ID%d\n", vf_id); + return; + } + + ice_migration_uninit_vf(vf); + ice_put_vf(vf); +} +EXPORT_SYMBOL(ice_migration_uninit_dev); diff --git a/drivers/net/ethernet/intel/ice/ice_migration_private.h b/drivers/net/ethernet/intel/ice/ice_migration_private.h new file mode 100644 index 000000000000..2cc2f515fc5e --- /dev/null +++ b/drivers/net/ethernet/intel/ice/ice_migration_private.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (C) 2018-2023 Intel Corporation */ + +#ifndef _ICE_MIGRATION_PRIVATE_H_ +#define _ICE_MIGRATION_PRIVATE_H_ + +/* This header file is for exposing functions in ice_migration.c to + * files which will be compiled in ice.ko. + * Functions which may be used by other files which will be compiled + * in ice-vfio-pic.ko should be exposed as part of ice_migration.h. + */ + +#if IS_ENABLED(CONFIG_ICE_VFIO_PCI) +void ice_migration_init_vf(struct ice_vf *vf); +void ice_migration_uninit_vf(struct ice_vf *vf); +#else +static inline void ice_migration_init_vf(struct ice_vf *vf) { } +static inline void ice_migration_uninit_vf(struct ice_vf *vf) { } +#endif /* CONFIG_ICE_VFIO_PCI */ + +#endif /* _ICE_MIGRATION_PRIVATE_H_ */ diff --git a/drivers/net/ethernet/intel/ice/ice_vf_lib.c b/drivers/net/ethernet/intel/ice/ice_vf_lib.c index aca1f2ea5034..8e571280831e 100644 --- a/drivers/net/ethernet/intel/ice/ice_vf_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_vf_lib.c @@ -243,6 +243,10 @@ static void ice_vf_pre_vsi_rebuild(struct ice_vf *vf) if (vf->vf_ops->irq_close) vf->vf_ops->irq_close(vf); + if (vf->migration_enabled) { + ice_migration_uninit_vf(vf); + ice_migration_init_vf(vf); + } ice_vf_clear_counters(vf); vf->vf_ops->clear_reset_trigger(vf); } diff --git a/drivers/net/ethernet/intel/ice/ice_vf_lib.h b/drivers/net/ethernet/intel/ice/ice_vf_lib.h index c7e7df7baf38..431fd28787e8 100644 --- a/drivers/net/ethernet/intel/ice/ice_vf_lib.h +++ b/drivers/net/ethernet/intel/ice/ice_vf_lib.h @@ -139,6 +139,8 @@ struct ice_vf { struct devlink_port devlink_port; u16 num_msix; /* num of MSI-X configured on this VF */ + + u8 migration_enabled:1; }; /* Flags for controlling behavior of ice_reset_vf */ diff --git a/include/linux/net/intel/ice_migration.h b/include/linux/net/intel/ice_migration.h new file mode 100644 index 000000000000..7ea11a8714d6 --- /dev/null +++ b/include/linux/net/intel/ice_migration.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (C) 2018-2023 Intel Corporation */ + +#ifndef _ICE_MIGRATION_H_ +#define _ICE_MIGRATION_H_ + +struct ice_pf; + +#if IS_ENABLED(CONFIG_ICE_VFIO_PCI) +struct ice_pf *ice_migration_get_pf(struct pci_dev *pdev); +int ice_migration_init_dev(struct ice_pf *pf, int vf_id); +void ice_migration_uninit_dev(struct ice_pf *pf, int vf_id); +#else +static inline struct ice_pf *ice_migration_get_pf(struct pci_dev *pdev) +{ + return NULL; +} + +static inline int ice_migration_init_dev(struct ice_pf *pf, int vf_id) +{ + return 0; +} + +static inline void ice_migration_uninit_dev(struct ice_pf *pf, int vf_id) { } +#endif /* CONFIG_ICE_VFIO_PCI */ + +#endif /* _ICE_MIGRATION_H_ */