From patchwork Fri Feb 5 20:53:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 12070899 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C760C433DB for ; Fri, 5 Feb 2021 20:56:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 409AF64FB0 for ; Fri, 5 Feb 2021 20:56:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233662AbhBETMa (ORCPT ); Fri, 5 Feb 2021 14:12:30 -0500 Received: from mga17.intel.com ([192.55.52.151]:61557 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233537AbhBETLq (ORCPT ); Fri, 5 Feb 2021 14:11:46 -0500 IronPort-SDR: gsEoVXZASDEKW9dCeVSI0zZVi4G95fQJ/h/h/GE16XSJfbufKAGjo8+Yn1hs5107zV+/BpwR0s FsIShFR3f6mA== X-IronPort-AV: E=McAfee;i="6000,8403,9886"; a="161241404" X-IronPort-AV: E=Sophos;i="5.81,156,1610438400"; d="scan'208";a="161241404" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2021 12:53:13 -0800 IronPort-SDR: WQo7t6UA6OS/eq/Jgf1sDDWOvVmnA2Nk9gHdyAJycQg/KlCybzaQhvmK9zrvo8ubBOkTS924/i UwXn2QJxvCmg== X-IronPort-AV: E=Sophos;i="5.81,156,1610438400"; d="scan'208";a="434596858" Received: from djiang5-desk3.ch.intel.com ([143.182.136.137]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2021 12:53:12 -0800 Subject: [PATCH v5 03/14] dmaengine: idxd: add device support functions in prep for mdev From: Dave Jiang To: alex.williamson@redhat.com, kwankhede@nvidia.com, tglx@linutronix.de, vkoul@kernel.org Cc: megha.dey@intel.com, jacob.jun.pan@intel.com, ashok.raj@intel.com, jgg@mellanox.com, yi.l.liu@intel.com, baolu.lu@intel.com, kevin.tian@intel.com, sanjay.k.kumar@intel.com, tony.luck@intel.com, dan.j.williams@intel.com, eric.auger@redhat.com, parav@mellanox.com, netanelg@mellanox.com, shahafs@mellanox.com, pbonzini@redhat.com, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Date: Fri, 05 Feb 2021 13:53:11 -0700 Message-ID: <161255839186.339900.4487176195680305351.stgit@djiang5-desk3.ch.intel.com> In-Reply-To: <161255810396.339900.7646244556839438765.stgit@djiang5-desk3.ch.intel.com> References: <161255810396.339900.7646244556839438765.stgit@djiang5-desk3.ch.intel.com> User-Agent: StGit/0.23-29-ga622f1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Add device support helper functions in preparation of adding VFIO mdev support. Signed-off-by: Dave Jiang --- drivers/dma/idxd/device.c | 61 ++++++++++++++++++++++++++++++++++++++++++ drivers/dma/idxd/idxd.h | 4 +++ drivers/dma/idxd/registers.h | 3 +- 3 files changed, 67 insertions(+), 1 deletion(-) diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index d6c447d09a6f..2491b27c8125 100644 --- a/drivers/dma/idxd/device.c +++ b/drivers/dma/idxd/device.c @@ -306,6 +306,30 @@ void idxd_wq_unmap_portal(struct idxd_wq *wq) devm_iounmap(dev, wq->portal); } +int idxd_wq_abort(struct idxd_wq *wq) +{ + struct idxd_device *idxd = wq->idxd; + struct device *dev = &idxd->pdev->dev; + u32 operand, status; + + dev_dbg(dev, "Abort WQ %d\n", wq->id); + if (wq->state != IDXD_WQ_ENABLED) { + dev_dbg(dev, "WQ %d not active\n", wq->id); + return -ENXIO; + } + + operand = BIT(wq->id % 16) | ((wq->id / 16) << 16); + dev_dbg(dev, "cmd: %u operand: %#x\n", IDXD_CMD_ABORT_WQ, operand); + idxd_cmd_exec(idxd, IDXD_CMD_ABORT_WQ, operand, &status); + if (status != IDXD_CMDSTS_SUCCESS) { + dev_dbg(dev, "WQ abort failed: %#x\n", status); + return -ENXIO; + } + + dev_dbg(dev, "WQ %d aborted\n", wq->id); + return 0; +} + int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid) { struct idxd_device *idxd = wq->idxd; @@ -412,6 +436,32 @@ void idxd_wq_quiesce(struct idxd_wq *wq) percpu_ref_exit(&wq->wq_active); } +void idxd_wq_setup_pasid(struct idxd_wq *wq, int pasid) +{ + struct idxd_device *idxd = wq->idxd; + int offset; + + lockdep_assert_held(&idxd->dev_lock); + + /* PASID fields are 8 bytes into the WQCFG register */ + offset = WQCFG_OFFSET(idxd, wq->id, WQCFG_PASID_IDX); + wq->wqcfg->pasid = pasid; + iowrite32(wq->wqcfg->bits[WQCFG_PASID_IDX], idxd->reg_base + offset); +} + +void idxd_wq_setup_priv(struct idxd_wq *wq, int priv) +{ + struct idxd_device *idxd = wq->idxd; + int offset; + + lockdep_assert_held(&idxd->dev_lock); + + /* priv field is 8 bytes into the WQCFG register */ + offset = WQCFG_OFFSET(idxd, wq->id, WQCFG_PRIV_IDX); + wq->wqcfg->priv = !!priv; + iowrite32(wq->wqcfg->bits[WQCFG_PRIV_IDX], idxd->reg_base + offset); +} + /* Device control bits */ static inline bool idxd_is_enabled(struct idxd_device *idxd) { @@ -599,6 +649,17 @@ void idxd_device_drain_pasid(struct idxd_device *idxd, int pasid) dev_dbg(dev, "pasid %d drained\n", pasid); } +void idxd_device_abort_pasid(struct idxd_device *idxd, int pasid) +{ + struct device *dev = &idxd->pdev->dev; + u32 operand; + + operand = pasid; + dev_dbg(dev, "cmd: %u operand: %#x\n", IDXD_CMD_ABORT_PASID, operand); + idxd_cmd_exec(idxd, IDXD_CMD_ABORT_PASID, operand, NULL); + dev_dbg(dev, "pasid %d aborted\n", pasid); +} + int idxd_device_request_int_handle(struct idxd_device *idxd, int idx, int *handle, enum idxd_interrupt_type irq_type) { diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h index 90c9458903e1..a2438b3166db 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -350,6 +350,7 @@ void idxd_device_cleanup(struct idxd_device *idxd); int idxd_device_config(struct idxd_device *idxd); void idxd_device_wqs_clear_state(struct idxd_device *idxd); void idxd_device_drain_pasid(struct idxd_device *idxd, int pasid); +void idxd_device_abort_pasid(struct idxd_device *idxd, int pasid); int idxd_device_load_config(struct idxd_device *idxd); int idxd_device_request_int_handle(struct idxd_device *idxd, int idx, int *handle, enum idxd_interrupt_type irq_type); @@ -369,6 +370,9 @@ int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid); int idxd_wq_disable_pasid(struct idxd_wq *wq); void idxd_wq_quiesce(struct idxd_wq *wq); int idxd_wq_init_percpu_ref(struct idxd_wq *wq); +int idxd_wq_abort(struct idxd_wq *wq); +void idxd_wq_setup_pasid(struct idxd_wq *wq, int pasid); +void idxd_wq_setup_priv(struct idxd_wq *wq, int priv); /* submission */ int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc); diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h index c97f700bcf34..d9a732decdd5 100644 --- a/drivers/dma/idxd/registers.h +++ b/drivers/dma/idxd/registers.h @@ -347,7 +347,8 @@ union wqcfg { u32 bits[8]; } __packed; -#define WQCFG_PASID_IDX 2 +#define WQCFG_PASID_IDX 2 +#define WQCFG_PRIV_IDX 2 /* * This macro calculates the offset into the WQCFG register