From patchwork Thu Dec 7 11:42:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Junxian Huang X-Patchwork-Id: 13483185 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7EE4137; Thu, 7 Dec 2023 03:46:10 -0800 (PST) Received: from kwepemi500006.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4SmCBc4MnszYsp3; Thu, 7 Dec 2023 19:45:28 +0800 (CST) Received: from localhost.localdomain (10.67.165.2) by kwepemi500006.china.huawei.com (7.221.188.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Thu, 7 Dec 2023 19:46:08 +0800 From: Junxian Huang To: , CC: , , , Subject: [PATCH v2 for-next 2/5] RDMA/hns: Response dmac to userspace Date: Thu, 7 Dec 2023 19:42:28 +0800 Message-ID: <20231207114231.2872104-3-huangjunxian6@hisilicon.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20231207114231.2872104-1-huangjunxian6@hisilicon.com> References: <20231207114231.2872104-1-huangjunxian6@hisilicon.com> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemi500006.china.huawei.com (7.221.188.68) X-CFilter-Loop: Reflected While creating AH, dmac is already resolved in kernel. Response dmac to userspace so that userspace doesn't need to resolve dmac repeatedly. Signed-off-by: Junxian Huang --- drivers/infiniband/hw/hns/hns_roce_ah.c | 7 +++++++ include/uapi/rdma/hns-abi.h | 5 +++++ 2 files changed, 12 insertions(+) diff --git a/drivers/infiniband/hw/hns/hns_roce_ah.c b/drivers/infiniband/hw/hns/hns_roce_ah.c index fbf046982374..b4209b6aed8d 100644 --- a/drivers/infiniband/hw/hns/hns_roce_ah.c +++ b/drivers/infiniband/hw/hns/hns_roce_ah.c @@ -57,6 +57,7 @@ int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, struct rdma_ah_attr *ah_attr = init_attr->ah_attr; const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr); struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device); + struct hns_roce_ib_create_ah_resp resp = {}; struct hns_roce_ah *ah = to_hr_ah(ibah); int ret = 0; u32 max_sl; @@ -97,6 +98,12 @@ int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID; } + if (udata) { + memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN); + ret = ib_copy_to_udata(udata, &resp, + min(udata->outlen, sizeof(resp))); + } + err_out: if (ret) atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_AH_CREATE_ERR_CNT]); diff --git a/include/uapi/rdma/hns-abi.h b/include/uapi/rdma/hns-abi.h index ce0f37f83416..c996e151081e 100644 --- a/include/uapi/rdma/hns-abi.h +++ b/include/uapi/rdma/hns-abi.h @@ -125,4 +125,9 @@ struct hns_roce_ib_alloc_pd_resp { __u32 pdn; }; +struct hns_roce_ib_create_ah_resp { + __u8 dmac[6]; + __u8 reserved[2]; +}; + #endif /* HNS_ABI_USER_H */