linux-kernel - [PATCH for-next 03/10] IB/hns: Add & initialize "node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1472765845-118972-4-git-send-email-salil.mehta@huawei.com>
Date:   Fri, 2 Sep 2016 05:37:18 +0800
From:   Salil Mehta <salil.mehta@...wei.com>
To:     <dledford@...hat.com>
CC:     <salil.mehta@...wei.com>, <xavier.huwei@...wei.com>,
        <oulijun@...wei.com>, <yisen.zhuang@...wei.com>,
        <mehta.salil.lnk@...il.com>, <linux-rdma@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>
Subject: [PATCH for-next 03/10] IB/hns: Add & initialize "node_guid" parameter for RDMA CM

From: Lijun Ou <oulijun@...wei.com>

According to the Infiniband spec, NodeGUID uniquely identifies a
node. This must be initialized to some unique value. This patch
adds the support to the HNS RoCE driver to fetch the NodeGUID
value from DT or ACPI and then use this value to initialize the
node_guid parameter of IB device. This value shall be used by
RDMA CM.

Signed-off-by: Lijun Ou <oulijun@...wei.com>
Reviewed-by: Wei Hu <xavier.huwei@...wei.com>
Signed-off-by: Salil Mehta <salil.mehta@...wei.com>
---
 drivers/infiniband/hw/hns/hns_roce_device.h |    1 +
 drivers/infiniband/hw/hns/hns_roce_main.c   |    7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index ea73580..e943b98 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -74,6 +74,7 @@
 #define MR_TYPE_DMA				0x03
 
 #define PKEY_ID					0xffff
+#define GUID_LEN				8
 #define NODE_DESC_SIZE				64
 
 #define SERV_TYPE_RC				0
diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c
index 4e93120..ec27f0c 100644
--- a/drivers/infiniband/hw/hns/hns_roce_main.c
+++ b/drivers/infiniband/hw/hns/hns_roce_main.c
@@ -812,6 +812,13 @@ static int hns_roce_get_cfg(struct hns_roce_dev *hr_dev)
 	if (IS_ERR(hr_dev->reg_base))
 		return PTR_ERR(hr_dev->reg_base);
 
+	/* read the node_guid of IB device from the DT or ACPI */
+	ret = device_property_read_u8_array(dev, "node-guid",
+					    (u8 *)&hr_dev->ib_dev.node_guid,
+					    GUID_LEN);
+	if (ret)
+		dev_err(dev, "couldn't get node_guid from DT or ACPI!\n");
+
 	/* get the RoCE associated ethernet ports or netdevices */
 	for (i = 0; i < HNS_ROCE_MAX_PORTS; i++) {
 		if (dev_of_node(dev)) {
-- 
1.7.9.5