From patchwork Thu Jul 13 00:37:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brett Creeley X-Patchwork-Id: 13311125 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 314F7EB64DD for ; Thu, 13 Jul 2023 00:38:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231269AbjGMAiA (ORCPT ); Wed, 12 Jul 2023 20:38:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232165AbjGMAh4 (ORCPT ); Wed, 12 Jul 2023 20:37:56 -0400 Received: from NAM04-BN8-obe.outbound.protection.outlook.com (mail-bn8nam04on20631.outbound.protection.outlook.com [IPv6:2a01:111:f400:7e8d::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80AC21FF7; Wed, 12 Jul 2023 17:37:52 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ColdZihzAKLCGBTP/a/2H2cSNVM28Qs88K8z5mjEFDjspvqwL/v1uoSxtlvAXsn9iF5icx1ZfKt1bDz7v1GdZP9BzoxPELcVTEKFE3cSRZjkpQ+E9qdw1+PpUzpmTmeGx0Sgcz23dXeVrj8pVo5s0GjTGRWrrB2DMeXrKpu7SbKF46u1blVtLv8jJ/sGWprJCMTvQhFaZnRCIVjbztq2Vr8FAOa2A55IuGq7r3eWJT7rSFpRpNH3Pp6c+kTB2w/CoS5o5yDMCxUm+XAk3NBqOM5NebF83RQQSRR6v/qOUjkcDIR1ejifFri95puC6XVOXS+E4WoSI4h2gAJzc/rPtg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Dhtzf745OaShR0kkCeRdZgSxrlKV9BRm6QPHcdGYIF0=; b=hj8wMWK9EkeWrdMCUh3dAmovmh7sj3AJpZ530hOhRFyzB/ejxWqrXC1SDf80yz4x5sv3LL05Ag4YsBX+ZN8ji/EeiUIIuXhbtfm7kHKAI37tq/K8ufXzL4k404cTtnvaIod9mfQAmCrutF/nfktss9r5xR7TCTMpan/EkEN1t3G558+Tla5lrHyq5FBTeCI6MIzOcxuTyo1AM4tpTa40HEvWEfH0yZhweSMLMtiC+Z0lCGX2mg00orB0TNMtsq6W8fc2VdHHjP31MJBSvDuXEJnR+nvut9sogJoVCzwXRyC5nNsG9k+xqLb4kv0sewht4xh98/EopLVLr79PyHqdrA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=vger.kernel.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Dhtzf745OaShR0kkCeRdZgSxrlKV9BRm6QPHcdGYIF0=; b=h4q10k8IKBKuj8DACK0lOz/yRGHaVG5pn4ACcQMqpINoHfuW66orCjfQfiJ12ACCsQN+GlgAjjc0XfVDjxLM0m4wkJwy+MsZQ8qQV10xk6yFKrlay8gDX+sFOEZz6XJyMrP7BMVXud6XSr3LKgTGQF8is0dBZ2uVgtvfMuRRmNI= Received: from MW4P222CA0022.NAMP222.PROD.OUTLOOK.COM (2603:10b6:303:114::27) by IA1PR12MB6601.namprd12.prod.outlook.com (2603:10b6:208:3a3::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6588.22; Thu, 13 Jul 2023 00:37:43 +0000 Received: from CO1NAM11FT111.eop-nam11.prod.protection.outlook.com (2603:10b6:303:114:cafe::5b) by MW4P222CA0022.outlook.office365.com (2603:10b6:303:114::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6588.22 via Frontend Transport; Thu, 13 Jul 2023 00:37:43 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CO1NAM11FT111.mail.protection.outlook.com (10.13.174.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6588.24 via Frontend Transport; Thu, 13 Jul 2023 00:37:43 +0000 Received: from driver-dev1.pensando.io (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Wed, 12 Jul 2023 19:37:41 -0500 From: Brett Creeley To: , , , , , , CC: , Subject: [PATCH v11 vfio 0/7] pds-vfio-pci driver Date: Wed, 12 Jul 2023 17:37:20 -0700 Message-ID: <20230713003727.11226-1-brett.creeley@amd.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT111:EE_|IA1PR12MB6601:EE_ X-MS-Office365-Filtering-Correlation-Id: 640faa6a-66c9-4e59-f9fa-08db83395f09 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(346002)(136003)(396003)(376002)(39860400002)(451199021)(46966006)(40470700004)(36840700001)(41300700001)(82740400003)(316002)(40460700003)(966005)(5660300002)(26005)(36756003)(1076003)(44832011)(8936002)(8676002)(83380400001)(82310400005)(426003)(47076005)(36860700001)(86362001)(81166007)(16526019)(2906002)(2616005)(30864003)(186003)(336012)(356005)(40480700001)(110136005)(54906003)(6666004)(478600001)(70586007)(70206006)(4326008)(333604002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jul 2023 00:37:43.2202 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 640faa6a-66c9-4e59-f9fa-08db83395f09 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT111.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6601 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This is a patchset for a new vendor specific VFIO driver (pds-vfio-pci) for use with the AMD/Pensando Distributed Services Card (DSC). This driver makes use of the pds_core driver. This driver will use the pds_core device's adminq as the VFIO control path to the DSC. In order to make adminq calls, the VFIO instance makes use of functions exported by the pds_core driver. In order to receive events from pds_core, the pds-vfio-pci driver registers to a private notifier. This is needed for various events that come from the device. An ASCII diagram of a VFIO instance looks something like this and can be used with the VFIO subsystem to provide the VF device VFIO and live migration support. .------. .-----------------------. | QEMU |--| VM .-------------. | '......' | | Eth VF | | | | .-------------. | | | | SR-IOV VF | | | | '-------------' | | '------------||---------' .--------------. || |/dev/| || '--------------' || Host Userspace | || =================================================== || Host Kernel | || .--------. || |vfio-pci| || '--------' || .------------------. || || | | exported API |<----+ || || | '--------------| | || || | | .--------------. || | pds_core |--->| pds-vfio-pci | || '------------------' | '--------------' || || | || || 09:00.0 notifier 09:00.1 || == PCI ===============================================||===== || || || .----------. .----------. || ,-----| PF |----------| VF |-------------------, | '----------' |'----------' VF | | DSC | data/control | | | path | ----------------------------------------------------------- The pds-vfio-pci driver is targeted to reside in drivers/vfio/pci/pds. It makes use of and introduces new files in the common include/linux/pds include directory. Note: This series is based on the latest linux-next tree. I did not base it on the Alex Williamson's vfio/next because it has not yet pulled in the latest changes which include the pds_vdpa driver. The pds_vdpa driver has conflicts with the pds-vfio-pci driver that needed to be resolved, which is why this series is based on the latest linux-next tree. Changes: v11: - Various fixes/suggestions by Kevin Tian: - Update commit message on patch 1/7 to mention ethernet VF - Fix formatting - Check return of pci_iov_vf_id() for error - Update MODULE_AUTHOR to be myself - Remove double print of pci_id - Set fast_poll=true for PDS_LM_CMD_RESUME - Update comments around SUSPEND and SUSPEND_STATUS operations - Get rid of pds_vfio_deferred_reset() and just perform the operations inline to the only caller - Rework pds_vfio_state_mutex_unlock() to be simpler - Rework comments in pds_vfio_recovery() - Append "vfio" to the end of PDS_LM_DEV_NAME - Remove req_len from pds_vfio_client_adminq_cmd() - Remove unused completion structures in pds_adminq.h - Fix comment above creating VFs to specify pds_core as the PF device - Various fixes/suggestions by Alex Williamson: - Removed cached pci_id from pds_vfio_device structure - Rename from pds_vfio to pds-vfio-pci - Various fixes/suggestions by Shameerali Kolothum Thodi: - Fix checking return of pds_client_register() - Use bool argument for flags instead of u64 on pds_vfio_client_adminq_cmd() - Fix support for VFIO_MIGRATION_P2P - Improve member name alignment in pds_adminq.h - Rework Kconfig based on latest changes from Alex Williamson v10: https://lore.kernel.org/netdev/1b5bb4df-df6f-65af-df05-08f1a4b3dacf@amd.com/ - Various fixes/suggestions by Jason Gunthorpe - Simplify pds_vfio_get_lm_file() based on fpga_mgr_buf_load() - Clean-ups/fixes based on clang-format - Remove any double goto labels - Name goto labels baesed on what needs to be cleaned/freed instead of a "call from" scheme - Fix any goto unwind ordering issues - Make sure call dma_map_single() after data is written to memory in pds_vfio_dma_map_lm_file() - Don't use bitmap_zalloc() for the dirty bitmaps - Use vzalloc() for dirty bitmaps and refactor how the bitmaps are DMA'd to and from the device in pds_vfio_dirty_seq_ack() - Remove unnecessary goto in pds_vfio_dirty_disable() v9: https://lore.kernel.org/netdev/20230422010642.60720-1-brett.creeley@amd.com/ - Various fixes/suggestions by Alex Williamson - Fix how ID is generated in client registration - Add helper functions to get the VF's struct device and struct pci_dev pointers instead of caching the struct pci dev - Remove redundant pds_vfio_lm_state() function and remove any places this was being called - Fix multi-line comments to follow standard convention - Remove confusing comments in pds_vfio_step_device_state_locked() since the driver's migration states align with the VFIO documentation - Validate pdsc returned from pdsc_get_pf_struct() - Various fixes/suggestions by Jason Gunthorpe - Use struct pdsc instead of void * - Use {} instead of {0} for structure initialization - Use unions on the stack instead of casting to the union when sending AQ commands, which required including pds_lm.h in pds_adminq.h - Replace use of dma_alloc_coherent() when creating the sgl DMA entries for the LM file - Remove cached struct device *coredev and instead use pci_physfn() to get the pds_core's struct device pointer - Drop the recovery work item and call pds_vfio_recovery() directly from the notifier callback - Remove unnecessary #define for "pds_vfio_lm" and just use the string inline to the anon_inode_getfile() argument - Fix LM file reference counting - Move initialization of some struct members to when the struct is being initialized for AQ commands - Make use of GFP_KERNEL_ACCOUNT where it makes sense - Replace PDS_VFIO_DRV_NAME with KBUILD_MODNAME - Update to latest pds_core exported functions - Remove duplicated prototypes for pds_vfio_dma_logging_[start|stop|report] from lm.h - Hold pds_vfio->state_mutex while starting, stopping, and reporting dirty page tracking in pds_vfio_dma_logging_[start|stop|report] - Remove duplicate PDS_DEV_TYPE_LM_STR define from pds_lm.h that's already included in pds_common.h - Replace use of dma_alloc_coherent() when creating the sgl DMA entries for the dirty bitmaps v8: https://lore.kernel.org/netdev/20230404190141.57762-1-brett.creeley@amd.com/ - provide default iommufd callbacks for bind_iommufd, unbind_iommufd, and attach_ioas for the VFIO device as suggested by Shameerali Kolothum Thodi v7: https://lore.kernel.org/netdev/20230331003612.17569-1-brett.creeley@amd.com/ - Disable and clean up dirty page tracking when the VFIO device is closed - Various improvements suggested by Simon Horman: - Fix RCT in vfio_combine_iova_ranges() - Simplify function exit paths by removing unnecessary goto labels - Cleanup pds_vifo_print_guest_region_info() by adding a goto label for freeing memory, which allowed for reduced indentation on a for loop - Where possible use C99 style for loops v6: https://lore.kernel.org/netdev/20230327200553.13951-1-brett.creeley@amd.com/ - As suggested by Alex Williamson, use pci_domain_nr() macro to make sure the pds_vfio client's devname is unique - Remove unnecessary forward declaration and include - Fix copyright comment to use correct company name - Remove "." from struct documentation for consistency v5: https://lore.kernel.org/netdev/20230322203442.56169-1-brett.creeley@amd.com/ - Fix SPDX comments in .h files - Remove adminqcq argument from pdsc_post_adminq() uses - Unregister client on vfio_pci_core_register_device() failure - Other minor checkpatch issues v4: https://lore.kernel.org/netdev/20230308052450.13421-1-brett.creeley@amd.com/ - Update cover letter ASCII diagram to reflect new driver architecture - Remove auxiliary driver implementation - Use pds_core's exported functions to communicate with the device - Implement and register notifier for events from the device/pds_core - Use module_pci_driver() macro since auxiliary driver configuration is no longer needed in __init/__exit v3: https://lore.kernel.org/netdev/20230219083908.40013-1-brett.creeley@amd.com/ - Update copyright year to 2023 and use "Advanced Micro Devices, Inc." for the company name - Clarify the fact that AMD/Pensando's VFIO solution is device type agnostic, which aligns with other current VFIO solutions - Add line in drivers/vfio/pci/Makefile to build pds_vfio - Move documentation to amd sub-directory - Remove some dead code due to the pds_core implementation of listening to BIND/UNBIND events - Move a dev_dbg() to a previous patch in the series - Add implementation for vfio_migration_ops.migration_get_data_size to return the maximum possible device state size RFC to v2: https://lore.kernel.org/all/20221214232136.64220-1-brett.creeley@amd.com/ - Implement state transitions for VFIO_MIGRATION_P2P flag - Improve auxiliary driver probe by returning EPROBE_DEFER when the PCI driver is not set up correctly - Add pointer to docs in Documentation/networking/device_drivers/ethernet/index.rst RFC: https://lore.kernel.org/all/20221207010705.35128-1-brett.creeley@amd.com/ Brett Creeley (7): vfio: Commonize combine_ranges for use in other VFIO drivers vfio/pds: Initial support for pds VFIO driver vfio/pds: register with the pds_core PF vfio/pds: Add VFIO live migration support vfio/pds: Add support for dirty page tracking vfio/pds: Add support for firmware recovery vfio/pds: Add Kconfig and documentation .../ethernet/amd/pds-vfio-pci.rst | 79 +++ .../device_drivers/ethernet/index.rst | 1 + MAINTAINERS | 7 + drivers/vfio/pci/Kconfig | 2 + drivers/vfio/pci/Makefile | 2 + drivers/vfio/pci/mlx5/cmd.c | 48 +- drivers/vfio/pci/pds/Kconfig | 19 + drivers/vfio/pci/pds/Makefile | 11 + drivers/vfio/pci/pds/cmds.c | 493 +++++++++++++++ drivers/vfio/pci/pds/cmds.h | 25 + drivers/vfio/pci/pds/dirty.c | 576 ++++++++++++++++++ drivers/vfio/pci/pds/dirty.h | 39 ++ drivers/vfio/pci/pds/lm.c | 434 +++++++++++++ drivers/vfio/pci/pds/lm.h | 41 ++ drivers/vfio/pci/pds/pci_drv.c | 214 +++++++ drivers/vfio/pci/pds/pci_drv.h | 9 + drivers/vfio/pci/pds/vfio_dev.c | 227 +++++++ drivers/vfio/pci/pds/vfio_dev.h | 42 ++ drivers/vfio/vfio_main.c | 47 ++ include/linux/pds/pds_adminq.h | 375 ++++++++++++ include/linux/pds/pds_common.h | 3 +- include/linux/vfio.h | 3 + 22 files changed, 2649 insertions(+), 48 deletions(-) create mode 100644 Documentation/networking/device_drivers/ethernet/amd/pds-vfio-pci.rst create mode 100644 drivers/vfio/pci/pds/Kconfig create mode 100644 drivers/vfio/pci/pds/Makefile create mode 100644 drivers/vfio/pci/pds/cmds.c create mode 100644 drivers/vfio/pci/pds/cmds.h create mode 100644 drivers/vfio/pci/pds/dirty.c create mode 100644 drivers/vfio/pci/pds/dirty.h create mode 100644 drivers/vfio/pci/pds/lm.c create mode 100644 drivers/vfio/pci/pds/lm.h create mode 100644 drivers/vfio/pci/pds/pci_drv.c create mode 100644 drivers/vfio/pci/pds/pci_drv.h create mode 100644 drivers/vfio/pci/pds/vfio_dev.c create mode 100644 drivers/vfio/pci/pds/vfio_dev.h