From patchwork Wed Oct 6 09:52:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 12538981 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C81AFC433F5 for ; Wed, 6 Oct 2021 09:52:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B32646109F for ; Wed, 6 Oct 2021 09:52:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238142AbhJFJye (ORCPT ); Wed, 6 Oct 2021 05:54:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:50780 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237952AbhJFJyb (ORCPT ); Wed, 6 Oct 2021 05:54:31 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5694B6109F; Wed, 6 Oct 2021 09:52:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1633513959; bh=mzKEN0EQc/b7YS5BzbKZbjSkPHo2FuHi9XCOU8juxTs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RQHJi5wGEQSj2tOLvQ5FxS4xbXsyh30pNOQLyyz+Egk92R/qVr8gYXynyUGOlha8A RwglsihjeKR6msA8Swop7HGAYY67BWj2x6NhOOg2vIWcK5ddHM8Wt4EMNTcI9z+H5b mBif25HvcdfZ/bEqG+WLKeYjkPUTYQ9ypNIeTmXgCt1FQHm1HsEM3u6NodNP+dN4se bO9iSW495euyvk9GimkehiMUd5SQxMdjyzdkGtossv1nfIFC0FofaGIKq24LPy5Awn Koq3O7rCzlA0SiLqK0kaM5gXkOKdgKqJWaiFmuM9Uxn4uK0lnnTas8ugKeh/GklTrc 1GTgxx0ko7oFA== From: Leon Romanovsky To: Doug Ledford , Jason Gunthorpe Cc: Aharon Landau , "David S. Miller" , Dennis Dalessandro , Gal Pressman , Jakub Kicinski , linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, Maor Gottlieb , Mark Zhang , Mike Marciniszyn , Mustafa Ismail , Neta Ostrovsky , netdev@vger.kernel.org, Potnuri Bharat Teja , Saeed Mahameed , Selvin Xavier , Shiraz Saleem , Yishai Hadas , Zhu Yanjun Subject: [PATCH rdma-next v3 06/13] RDMA/counter: Add optional counter support Date: Wed, 6 Oct 2021 12:52:09 +0300 Message-Id: <54491e42ed12ff06ecabb1720589fd13eb5df33f.1633513239.git.leonro@nvidia.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Aharon Landau An optional counter is a vendor-specific counter that may be dynamically enabled/disabled. This enhancement allows us to expose counters which are for example mutual exclusive and cannot be enabled at the same time, counters that might degrades performance, optional debug counters, etc. Optional counters are marked with IB_STAT_FLAG_OPTIONAL flag. They are not exported in sysfs, and must be at the end of all stats, otherwise the attr->show() in sysfs would get wrong indexes for hwcounters that are behind optional counters. Signed-off-by: Aharon Landau Signed-off-by: Neta Ostrovsky Reviewed-by: Mark Zhang Signed-off-by: Leon Romanovsky --- drivers/infiniband/core/counters.c | 32 ++++++++++++++++++++++++++ drivers/infiniband/core/device.c | 1 + drivers/infiniband/core/sysfs.c | 36 +++++++++++++++++++++--------- include/rdma/ib_verbs.h | 13 +++++++++++ include/rdma/rdma_counter.h | 2 ++ 5 files changed, 74 insertions(+), 10 deletions(-) diff --git a/drivers/infiniband/core/counters.c b/drivers/infiniband/core/counters.c index 331cd29f0d61..af59486fe418 100644 --- a/drivers/infiniband/core/counters.c +++ b/drivers/infiniband/core/counters.c @@ -106,6 +106,38 @@ static int __rdma_counter_bind_qp(struct rdma_counter *counter, return ret; } +int rdma_counter_modify(struct ib_device *dev, u32 port, + unsigned int index, bool enable) +{ + struct rdma_hw_stats *stats; + int ret = 0; + + if (!dev->ops.modify_hw_stat) + return -EOPNOTSUPP; + + stats = ib_get_hw_stats_port(dev, port); + if (!stats || index >= stats->num_counters || + !(stats->descs[index].flags & IB_STAT_FLAG_OPTIONAL)) + return -EINVAL; + + mutex_lock(&stats->lock); + + if (enable != test_bit(index, stats->is_disabled)) + goto out; + + ret = dev->ops.modify_hw_stat(dev, port, index, enable); + if (ret) + goto out; + + if (enable) + clear_bit(index, stats->is_disabled); + else + set_bit(index, stats->is_disabled); +out: + mutex_unlock(&stats->lock); + return ret; +} + static struct rdma_counter *alloc_and_bind(struct ib_device *dev, u32 port, struct ib_qp *qp, enum rdma_nl_counter_mode mode) diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index f4814bb7f082..22a4adda7981 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -2676,6 +2676,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops) SET_DEVICE_OP(dev_ops, modify_cq); SET_DEVICE_OP(dev_ops, modify_device); SET_DEVICE_OP(dev_ops, modify_flow_action_esp); + SET_DEVICE_OP(dev_ops, modify_hw_stat); SET_DEVICE_OP(dev_ops, modify_port); SET_DEVICE_OP(dev_ops, modify_qp); SET_DEVICE_OP(dev_ops, modify_srq); diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c index 8d831d4fd2ad..1bf3aea4b71e 100644 --- a/drivers/infiniband/core/sysfs.c +++ b/drivers/infiniband/core/sysfs.c @@ -934,7 +934,8 @@ int ib_setup_device_attrs(struct ib_device *ibdev) { struct hw_stats_device_attribute *attr; struct hw_stats_device_data *data; - int i, ret; + bool opstat_skipped = false; + int i, ret, pos = 0; data = alloc_hw_stats_device(ibdev); if (IS_ERR(data)) { @@ -955,16 +956,23 @@ int ib_setup_device_attrs(struct ib_device *ibdev) data->stats->timestamp = jiffies; for (i = 0; i < data->stats->num_counters; i++) { - attr = &data->attrs[i]; + if (data->stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL) { + opstat_skipped = true; + continue; + } + + WARN_ON(opstat_skipped); + attr = &data->attrs[pos]; sysfs_attr_init(&attr->attr.attr); attr->attr.attr.name = data->stats->descs[i].name; attr->attr.attr.mode = 0444; attr->attr.show = hw_stat_device_show; attr->show = show_hw_stats; - data->group.attrs[i] = &attr->attr.attr; + data->group.attrs[pos] = &attr->attr.attr; + pos++; } - attr = &data->attrs[i]; + attr = &data->attrs[pos]; sysfs_attr_init(&attr->attr.attr); attr->attr.attr.name = "lifespan"; attr->attr.attr.mode = 0644; @@ -972,7 +980,7 @@ int ib_setup_device_attrs(struct ib_device *ibdev) attr->show = show_stats_lifespan; attr->attr.store = hw_stat_device_store; attr->store = set_stats_lifespan; - data->group.attrs[i] = &attr->attr.attr; + data->group.attrs[pos] = &attr->attr.attr; for (i = 0; i != ARRAY_SIZE(ibdev->groups); i++) if (!ibdev->groups[i]) { ibdev->groups[i] = &data->group; @@ -1027,7 +1035,8 @@ static int setup_hw_port_stats(struct ib_port *port, { struct hw_stats_port_attribute *attr; struct hw_stats_port_data *data; - int i, ret; + bool opstat_skipped = false; + int i, ret, pos = 0; data = alloc_hw_stats_port(port, group); if (IS_ERR(data)) @@ -1045,16 +1054,23 @@ static int setup_hw_port_stats(struct ib_port *port, data->stats->timestamp = jiffies; for (i = 0; i < data->stats->num_counters; i++) { - attr = &data->attrs[i]; + if (data->stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL) { + opstat_skipped = true; + continue; + } + + WARN_ON(opstat_skipped); + attr = &data->attrs[pos]; sysfs_attr_init(&attr->attr.attr); attr->attr.attr.name = data->stats->descs[i].name; attr->attr.attr.mode = 0444; attr->attr.show = hw_stat_port_show; attr->show = show_hw_stats; - group->attrs[i] = &attr->attr.attr; + group->attrs[pos] = &attr->attr.attr; + pos++; } - attr = &data->attrs[i]; + attr = &data->attrs[pos]; sysfs_attr_init(&attr->attr.attr); attr->attr.attr.name = "lifespan"; attr->attr.attr.mode = 0644; @@ -1062,7 +1078,7 @@ static int setup_hw_port_stats(struct ib_port *port, attr->show = show_stats_lifespan; attr->attr.store = hw_stat_port_store; attr->store = set_stats_lifespan; - group->attrs[i] = &attr->attr.attr; + group->attrs[pos] = &attr->attr.attr; port->hw_stats_data = data; return 0; diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index ae467365706b..2207f60b002f 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -545,12 +545,18 @@ enum ib_port_speed { IB_SPEED_NDR = 128, }; +enum ib_stat_flag { + IB_STAT_FLAG_OPTIONAL = 1 << 0, +}; + /** * struct rdma_stat_desc * @name - The name of the counter + * @flags - Flags of the counter; For example, IB_STAT_FLAG_OPTIONAL */ struct rdma_stat_desc { const char *name; + unsigned int flags; }; /** @@ -2562,6 +2568,13 @@ struct ib_device_ops { int (*get_hw_stats)(struct ib_device *device, struct rdma_hw_stats *stats, u32 port, int index); + /** + * modify_hw_stat - Modify the counter configuration + * @enable: true/false when enable/disable a counter + * Return codes - 0 on success or error code otherwise. + */ + int (*modify_hw_stat)(struct ib_device *device, u32 port, + unsigned int counter_index, bool enable); /** * Allows rdma drivers to add their own restrack attributes. */ diff --git a/include/rdma/rdma_counter.h b/include/rdma/rdma_counter.h index 0295b22cd1cd..45d5481a7846 100644 --- a/include/rdma/rdma_counter.h +++ b/include/rdma/rdma_counter.h @@ -63,4 +63,6 @@ int rdma_counter_get_mode(struct ib_device *dev, u32 port, enum rdma_nl_counter_mode *mode, enum rdma_nl_counter_mask *mask); +int rdma_counter_modify(struct ib_device *dev, u32 port, + unsigned int index, bool enable); #endif /* _RDMA_COUNTER_H_ */