From patchwork Mon Mar 6 18:52:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zanussi, Tom" X-Patchwork-Id: 13162167 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 D22BFC6FD1B for ; Mon, 6 Mar 2023 18:52:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230384AbjCFSwt (ORCPT ); Mon, 6 Mar 2023 13:52:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230315AbjCFSwk (ORCPT ); Mon, 6 Mar 2023 13:52:40 -0500 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2F11741B4E; Mon, 6 Mar 2023 10:52:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678128757; x=1709664757; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=oowziMwXwVGyoGa9lxmkLd9ABSwpuSTfsdgiXE790Ps=; b=N10jfWfuvdc1zFQza1b6LM2f0RikZCsF9tzAH/vhd6CKAiVvuzge0BD5 fKkSOsBKiSYYj5dNM4hTv/VHafJAwPoAPRWhB0TbEhvjeV5N7dO0EqplN LrzemKLIkRXRiYx2XEduaWAJn8SiUF2QA+00qMgVEMjkUovd1BLRYuI8M Z2VuGbhiBvmBqwx9uABjj1yi10gLANHEDpDSV8OcvdXtVwCbHsWZj6/+U uCttXGXbWC8SX4HdcZS59RCgeXvm8hyH9/HDlPoqytaRE0pQbDUnKBfFh XtBA66wAenTjPUM2xGXTw7SriG8WEvbW7qhpet46ttGk5TNhETM5ehWRO w==; X-IronPort-AV: E=McAfee;i="6500,9779,10641"; a="398227656" X-IronPort-AV: E=Sophos;i="5.98,238,1673942400"; d="scan'208";a="398227656" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Mar 2023 10:52:34 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10641"; a="626255730" X-IronPort-AV: E=Sophos;i="5.98,238,1673942400"; d="scan'208";a="626255730" Received: from jeblanco-mobl.amr.corp.intel.com (HELO tzanussi-mobl1.hsd1.il.comcast.net) ([10.212.118.26]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Mar 2023 10:52:32 -0800 From: Tom Zanussi To: herbert@gondor.apana.org.au, davem@davemloft.net, fenghua.yu@intel.com, vkoul@kernel.org Cc: dave.jiang@intel.com, tony.luck@intel.com, wajdi.k.feghali@intel.com, james.guilford@intel.com, kanchana.p.sridhar@intel.com, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, dmaengine@vger.kernel.org Subject: [PATCH 01/16] dmaengine: idxd: add wq driver name support for accel-config user tool Date: Mon, 6 Mar 2023 12:52:11 -0600 Message-Id: <20230306185226.26483-2-tom.zanussi@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230306185226.26483-1-tom.zanussi@linux.intel.com> References: <20230306185226.26483-1-tom.zanussi@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org From: Dave Jiang With the possibility of multiple wq drivers that can be bound to the wq, the user config tool accel-config needs a way to know which wq driver to bind to the wq. Introduce per wq driver_name sysfs attribute where the user can indicate the driver to be bound to the wq. This allows accel-config to just bind to the driver using wq->driver_name. Signed-off-by: Dave Jiang Signed-off-by: Tom Zanussi --- .../ABI/stable/sysfs-driver-dma-idxd | 6 ++++ drivers/dma/idxd/cdev.c | 8 ++++++ drivers/dma/idxd/dma.c | 6 ++++ drivers/dma/idxd/idxd.h | 7 +++++ drivers/dma/idxd/sysfs.c | 28 +++++++++++++++++++ include/uapi/linux/idxd.h | 1 + 6 files changed, 56 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-driver-dma-idxd b/Documentation/ABI/stable/sysfs-driver-dma-idxd index 3becc9a82bdf..e9a37e064193 100644 --- a/Documentation/ABI/stable/sysfs-driver-dma-idxd +++ b/Documentation/ABI/stable/sysfs-driver-dma-idxd @@ -244,6 +244,12 @@ Description: Shows the operation capability bits displayed in bitmap format correlates to the operations allowed. It's visible only on platforms that support the capability. +What: /sys/bus/dsa/devices/wq./driver_name +Date: Feb 23, 2023 +KernelVersion: 6.3.0 +Contact: dmaengine@vger.kernel.org +Description: Name of driver to be bounded to the wq. + What: /sys/bus/dsa/devices/engine./group_id Date: Oct 25, 2019 KernelVersion: 5.6.0 diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c index 674bfefca088..f3d1604e753d 100644 --- a/drivers/dma/idxd/cdev.c +++ b/drivers/dma/idxd/cdev.c @@ -304,6 +304,7 @@ void idxd_wq_del_cdev(struct idxd_wq *wq) static int idxd_user_drv_probe(struct idxd_dev *idxd_dev) { + struct device *dev = &idxd_dev->conf_dev; struct idxd_wq *wq = idxd_dev_to_wq(idxd_dev); struct idxd_device *idxd = wq->idxd; int rc; @@ -330,6 +331,13 @@ static int idxd_user_drv_probe(struct idxd_dev *idxd_dev) } mutex_lock(&wq->wq_lock); + + if (!idxd_wq_driver_name_match(wq, dev)) { + idxd->cmd_status = IDXD_SCMD_WQ_NO_DRV_NAME; + rc = -ENODEV; + goto err; + } + wq->type = IDXD_WQT_USER; rc = drv_enable_wq(wq); if (rc < 0) diff --git a/drivers/dma/idxd/dma.c b/drivers/dma/idxd/dma.c index eb35ca313684..8bb7e7ff8d6a 100644 --- a/drivers/dma/idxd/dma.c +++ b/drivers/dma/idxd/dma.c @@ -305,6 +305,12 @@ static int idxd_dmaengine_drv_probe(struct idxd_dev *idxd_dev) return -ENXIO; mutex_lock(&wq->wq_lock); + if (!idxd_wq_driver_name_match(wq, dev)) { + idxd->cmd_status = IDXD_SCMD_WQ_NO_DRV_NAME; + rc = -ENODEV; + goto err; + } + wq->type = IDXD_WQT_KERNEL; rc = drv_enable_wq(wq); diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h index 7ced8d283d98..505118fc19de 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -214,6 +214,8 @@ struct idxd_wq { char name[WQ_NAME_SIZE + 1]; u64 max_xfer_bytes; u32 max_batch_size; + + char driver_name[WQ_NAME_SIZE + 1]; }; struct idxd_engine { @@ -580,6 +582,11 @@ static inline void idxd_wqcfg_set_max_batch_shift(int idxd_type, union wqcfg *wq wqcfg->max_batch_shift = max_batch_shift; } +static inline int idxd_wq_driver_name_match(struct idxd_wq *wq, struct device *dev) +{ + return (strncmp(wq->driver_name, dev->driver->name, strlen(dev->driver->name)) == 0); +} + int __must_check __idxd_driver_register(struct idxd_device_driver *idxd_drv, struct module *module, const char *mod_name); #define idxd_driver_register(driver) \ diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 18cd8151dee0..cb5864c98d5a 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1224,6 +1224,33 @@ static ssize_t wq_op_config_store(struct device *dev, struct device_attribute *a static struct device_attribute dev_attr_wq_op_config = __ATTR(op_config, 0644, wq_op_config_show, wq_op_config_store); +static ssize_t wq_driver_name_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct idxd_wq *wq = confdev_to_wq(dev); + + return sysfs_emit(buf, "%s\n", wq->driver_name); +} + +static ssize_t wq_driver_name_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct idxd_wq *wq = confdev_to_wq(dev); + + if (wq->state != IDXD_WQ_DISABLED) + return -EPERM; + + if (strlen(buf) > WQ_NAME_SIZE || strlen(buf) == 0) + return -EINVAL; + + memset(wq->driver_name, 0, WQ_NAME_SIZE + 1); + strncpy(wq->driver_name, buf, WQ_NAME_SIZE); + strreplace(wq->name, '\n', '\0'); + return count; +} + +static struct device_attribute dev_attr_wq_driver_name = + __ATTR(driver_name, 0644, wq_driver_name_show, wq_driver_name_store); + static struct attribute *idxd_wq_attributes[] = { &dev_attr_wq_clients.attr, &dev_attr_wq_state.attr, @@ -1242,6 +1269,7 @@ static struct attribute *idxd_wq_attributes[] = { &dev_attr_wq_occupancy.attr, &dev_attr_wq_enqcmds_retries.attr, &dev_attr_wq_op_config.attr, + &dev_attr_wq_driver_name.attr, NULL, }; diff --git a/include/uapi/linux/idxd.h b/include/uapi/linux/idxd.h index 1d553bedbdb5..2f85c8f59eb5 100644 --- a/include/uapi/linux/idxd.h +++ b/include/uapi/linux/idxd.h @@ -30,6 +30,7 @@ enum idxd_scmd_stat { IDXD_SCMD_WQ_NO_PRIV = 0x800f0000, IDXD_SCMD_WQ_IRQ_ERR = 0x80100000, IDXD_SCMD_WQ_USER_NO_IOMMU = 0x80110000, + IDXD_SCMD_WQ_NO_DRV_NAME = 0x80200000, }; #define IDXD_SCMD_SOFTERR_MASK 0x80000000