From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 00E3EC433F1 for ; Tue, 21 Jul 2020 16:03:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DFD9620792 for ; Tue, 21 Jul 2020 16:03:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728755AbgGUQDL (ORCPT ); Tue, 21 Jul 2020 12:03:11 -0400 Received: from mga02.intel.com ([134.134.136.20]:5374 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727058AbgGUQDL (ORCPT ); Tue, 21 Jul 2020 12:03:11 -0400 IronPort-SDR: 1tC4jcURO/5EA5m326zKKKMVORHDAvpiyK2ky8j4dbDFSyqwpc1ZrkS2/C/StobG1JNZFHrdIX fuM7ldvObc4g== X-IronPort-AV: E=McAfee;i="6000,8403,9689"; a="138252508" X-IronPort-AV: E=Sophos;i="5.75,379,1589266800"; d="scan'208";a="138252508" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jul 2020 09:03:09 -0700 IronPort-SDR: /pjMsLIxKcWsy/wn5atmSOoFzSeBxOeyT/vCygbm1+GDCi5YJ0eKbF6XHsOu13smUjm15HgFNj DWG3BMtxOP3g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,379,1589266800"; d="scan'208";a="462124823" Received: from djiang5-desk3.ch.intel.com ([143.182.136.137]) by orsmga005.jf.intel.com with ESMTP; 21 Jul 2020 09:03:07 -0700 Subject: [PATCH RFC v2 08/18] dmaengine: idxd: add device support functions in prep for mdev From: Dave Jiang To: vkoul@kernel.org, megha.dey@intel.com, maz@kernel.org, bhelgaas@google.com, rafael@kernel.org, gregkh@linuxfoundation.org, tglx@linutronix.de, hpa@zytor.com, alex.williamson@redhat.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, jing.lin@intel.com, dan.j.williams@intel.com, kwankhede@nvidia.com, eric.auger@redhat.com, parav@mellanox.com, jgg@mellanox.com, rafael@kernel.org, dave.hansen@intel.com, netanelg@mellanox.com, shahafs@mellanox.com, yan.y.zhao@linux.intel.com, pbonzini@redhat.com, samuel.ortiz@intel.com, mona.hossain@intel.com Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org Date: Tue, 21 Jul 2020 09:03:07 -0700 Message-ID: <159534738747.28840.9497901333645332923.stgit@djiang5-desk3.ch.intel.com> In-Reply-To: <159534667974.28840.2045034360240786644.stgit@djiang5-desk3.ch.intel.com> References: <159534667974.28840.2045034360240786644.stgit@djiang5-desk3.ch.intel.com> User-Agent: StGit/unknown-version MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: dmaengine-owner@vger.kernel.org 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 Reviewed-by: Kevin Tian --- drivers/dma/idxd/device.c | 61 +++++++++++++++++++++++++++++++++++++++++++++ drivers/dma/idxd/idxd.h | 4 +++ 2 files changed, 65 insertions(+) diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index 2b4e8ab99ebd..7443ffb5d3c3 100644 --- a/drivers/dma/idxd/device.c +++ b/drivers/dma/idxd/device.c @@ -287,6 +287,30 @@ 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; @@ -366,6 +390,32 @@ void idxd_wq_disable_cleanup(struct idxd_wq *wq) } } +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 = idxd->wqcfg_offset + wq->id * 32 + 8; + wq->wqcfg.pasid = pasid; + iowrite32(wq->wqcfg.bits[2], 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 = idxd->wqcfg_offset + wq->id * 32 + 8; + wq->wqcfg.priv = !!priv; + iowrite32(wq->wqcfg.bits[2], idxd->reg_base + offset); +} + /* Device control bits */ static inline bool idxd_is_enabled(struct idxd_device *idxd) { @@ -502,6 +552,17 @@ 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); +} + #define INT_HANDLE_IMS_TABLE 0x10000 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 c65fb6dcb7e0..438d6478a3f8 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -321,6 +321,7 @@ 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); @@ -336,6 +337,9 @@ void idxd_wq_unmap_portal(struct idxd_wq *wq); void idxd_wq_disable_cleanup(struct idxd_wq *wq); int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid); int idxd_wq_disable_pasid(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);