linux-kernel - [PATCH 5.13 484/800] RDMA/hns: Clear extended doorbell info before using

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Date:   Mon, 12 Jul 2021 08:08:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Xi Wang <wangxi11@...wei.com>,
        Weihang Li <liweihang@...wei.com>,
        Leon Romanovsky <leonro@...dia.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 484/800] RDMA/hns: Clear extended doorbell info before using

From: Xi Wang <wangxi11@...wei.com>

[ Upstream commit 7e78dd816e458fbc2928a068d70009178d5d070d ]

Both of HIP08 and HIP09 require the extended doorbell information to be
cleared before being used.

Fixes: 6b63597d3540 ("RDMA/hns: Add TSQ link table support")
Link: https://lore.kernel.org/r/1623392089-35639-1-git-send-email-liweihang@huawei.com
Signed-off-by: Xi Wang <wangxi11@...wei.com>
Signed-off-by: Weihang Li <liweihang@...wei.com>
Reviewed-by: Leon Romanovsky <leonro@...dia.com>
Signed-off-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 21 +++++++++++++++++++++
 drivers/infiniband/hw/hns/hns_roce_hw_v2.h |  1 +
 2 files changed, 22 insertions(+)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index d7289b6587f1..78f3e05cc1f5 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -1619,6 +1619,22 @@ static void hns_roce_function_clear(struct hns_roce_dev *hr_dev)
 	}
 }
 
+static int hns_roce_clear_extdb_list_info(struct hns_roce_dev *hr_dev)
+{
+	struct hns_roce_cmq_desc desc;
+	int ret;
+
+	hns_roce_cmq_setup_basic_desc(&desc, HNS_ROCE_OPC_CLEAR_EXTDB_LIST_INFO,
+				      false);
+	ret = hns_roce_cmq_send(hr_dev, &desc, 1);
+	if (ret)
+		ibdev_err(&hr_dev->ib_dev,
+			  "failed to clear extended doorbell info, ret = %d.\n",
+			  ret);
+
+	return ret;
+}
+
 static int hns_roce_query_fw_ver(struct hns_roce_dev *hr_dev)
 {
 	struct hns_roce_query_fw_info *resp;
@@ -2732,6 +2748,11 @@ static int hns_roce_v2_init(struct hns_roce_dev *hr_dev)
 	struct hns_roce_v2_priv *priv = hr_dev->priv;
 	int ret;
 
+	/* The hns ROCEE requires the extdb info to be cleared before using */
+	ret = hns_roce_clear_extdb_list_info(hr_dev);
+	if (ret)
+		return ret;
+
 	ret = get_hem_table(hr_dev);
 	if (ret)
 		return ret;
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
index a2100a629859..028bc41cb45c 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
@@ -248,6 +248,7 @@ enum hns_roce_opcode_type {
 	HNS_ROCE_OPC_CLR_SCCC				= 0x8509,
 	HNS_ROCE_OPC_QUERY_SCCC				= 0x850a,
 	HNS_ROCE_OPC_RESET_SCCC				= 0x850b,
+	HNS_ROCE_OPC_CLEAR_EXTDB_LIST_INFO		= 0x850d,
 	HNS_ROCE_OPC_QUERY_VF_RES			= 0x850e,
 	HNS_ROCE_OPC_CFG_GMV_TBL			= 0x850f,
 	HNS_ROCE_OPC_CFG_GMV_BT				= 0x8510,
-- 
2.30.2