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From: Lijun Ou <oulijun@huawei.com>
To: <ferruh.yigit@intel.com>
Cc: <dev@dpdk.org>
Subject: [dpdk-dev] [PATCH 6/8] net/hns3: fix data overwriting during register dump
Date: Thu, 14 Jan 2021 21:33:35 +0800
Message-ID: <1610631217-14216-7-git-send-email-oulijun@huawei.com> (raw)
In-Reply-To: <1610631217-14216-1-git-send-email-oulijun@huawei.com>

From: Chengchang Tang <tangchengchang@huawei.com>

The data pointer has not moved after BAR register dumped. This causes the
later register to overwrite the previous data.

This patch fix the overwriting by move the pointer after every dump
function. And the missing separator between 32-bit register and the 64-bit
register is also added to avoid a parsing error.

Fixes: 936eda25e8da ("net/hns3: support dump register")
Cc: stable@dpdk.org

Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
---
 drivers/net/hns3/hns3_regs.c | 70 +++++++++++++++++++++++++-------------------
 1 file changed, 40 insertions(+), 30 deletions(-)

diff --git a/drivers/net/hns3/hns3_regs.c b/drivers/net/hns3/hns3_regs.c
index 32597fe..775e096 100644
--- a/drivers/net/hns3/hns3_regs.c
+++ b/drivers/net/hns3/hns3_regs.c
@@ -252,63 +252,68 @@ hns3_get_64_bit_regs(struct hns3_hw *hw, uint32_t regs_num, void *data)
 	return 0;
 }
 
-static void
+static int
+hns3_insert_reg_separator(int reg_num, uint32_t *data)
+{
+	int separator_num;
+	int i;
+
+	separator_num = MAX_SEPARATE_NUM - reg_num % REG_NUM_PER_LINE;
+	for (i = 0; i < separator_num; i++)
+		*data++ = SEPARATOR_VALUE;
+	return separator_num;
+}
+
+static int
 hns3_direct_access_regs(struct hns3_hw *hw, uint32_t *data)
 {
 	struct hns3_adapter *hns = HNS3_DEV_HW_TO_ADAPTER(hw);
+	uint32_t *origin_data_ptr = data;
 	uint32_t reg_offset;
-	int separator_num;
-	int reg_um;
+	int reg_num;
 	int i, j;
 
 	/* fetching per-PF registers values from PF PCIe register space */
-	reg_um = sizeof(cmdq_reg_addrs) / sizeof(uint32_t);
-	separator_num = MAX_SEPARATE_NUM - reg_um % REG_NUM_PER_LINE;
-	for (i = 0; i < reg_um; i++)
+	reg_num = sizeof(cmdq_reg_addrs) / sizeof(uint32_t);
+	for (i = 0; i < reg_num; i++)
 		*data++ = hns3_read_dev(hw, cmdq_reg_addrs[i]);
-	for (i = 0; i < separator_num; i++)
-		*data++ = SEPARATOR_VALUE;
+	data += hns3_insert_reg_separator(reg_num, data);
 
 	if (hns->is_vf)
-		reg_um = sizeof(common_vf_reg_addrs) / sizeof(uint32_t);
+		reg_num = sizeof(common_vf_reg_addrs) / sizeof(uint32_t);
 	else
-		reg_um = sizeof(common_reg_addrs) / sizeof(uint32_t);
-	separator_num = MAX_SEPARATE_NUM - reg_um % REG_NUM_PER_LINE;
-	for (i = 0; i < reg_um; i++)
+		reg_num = sizeof(common_reg_addrs) / sizeof(uint32_t);
+	for (i = 0; i < reg_num; i++)
 		if (hns->is_vf)
 			*data++ = hns3_read_dev(hw, common_vf_reg_addrs[i]);
 		else
 			*data++ = hns3_read_dev(hw, common_reg_addrs[i]);
-	for (i = 0; i < separator_num; i++)
-		*data++ = SEPARATOR_VALUE;
+	data += hns3_insert_reg_separator(reg_num, data);
 
-	reg_um = sizeof(ring_reg_addrs) / sizeof(uint32_t);
-	separator_num = MAX_SEPARATE_NUM - reg_um % REG_NUM_PER_LINE;
+	reg_num = sizeof(ring_reg_addrs) / sizeof(uint32_t);
 	for (j = 0; j < hw->tqps_num; j++) {
 		reg_offset = hns3_get_tqp_reg_offset(j);
-		for (i = 0; i < reg_um; i++)
+		for (i = 0; i < reg_num; i++)
 			*data++ = hns3_read_dev(hw,
 						ring_reg_addrs[i] + reg_offset);
-		for (i = 0; i < separator_num; i++)
-			*data++ = SEPARATOR_VALUE;
+		data += hns3_insert_reg_separator(reg_num, data);
 	}
 
-	reg_um = sizeof(tqp_intr_reg_addrs) / sizeof(uint32_t);
-	separator_num = MAX_SEPARATE_NUM - reg_um % REG_NUM_PER_LINE;
+	reg_num = sizeof(tqp_intr_reg_addrs) / sizeof(uint32_t);
 	for (j = 0; j < hw->num_msi; j++) {
 		reg_offset = HNS3_TQP_INTR_REG_SIZE * j;
-		for (i = 0; i < reg_um; i++)
-			*data++ = hns3_read_dev(hw,
-						tqp_intr_reg_addrs[i] +
+		for (i = 0; i < reg_num; i++)
+			*data++ = hns3_read_dev(hw, tqp_intr_reg_addrs[i] +
 						reg_offset);
-		for (i = 0; i < separator_num; i++)
-			*data++ = SEPARATOR_VALUE;
+		data += hns3_insert_reg_separator(reg_num, data);
 	}
+	return data - origin_data_ptr;
 }
 
 int
 hns3_get_regs(struct rte_eth_dev *eth_dev, struct rte_dev_reg_info *regs)
 {
+#define HNS3_64_BIT_REG_SIZE (sizeof(uint64_t) / sizeof(uint32_t))
 	struct hns3_adapter *hns = eth_dev->data->dev_private;
 	struct hns3_hw *hw = &hns->hw;
 	uint32_t regs_num_32_bit;
@@ -338,7 +343,7 @@ hns3_get_regs(struct rte_eth_dev *eth_dev, struct rte_dev_reg_info *regs)
 		return -ENOTSUP;
 
 	/* fetching per-PF registers values from PF PCIe register space */
-	hns3_direct_access_regs(hw, data);
+	data += hns3_direct_access_regs(hw, data);
 
 	if (hns->is_vf)
 		return 0;
@@ -355,11 +360,16 @@ hns3_get_regs(struct rte_eth_dev *eth_dev, struct rte_dev_reg_info *regs)
 		hns3_err(hw, "Get 32 bit register failed, ret = %d", ret);
 		return ret;
 	}
-
 	data += regs_num_32_bit;
+	data += hns3_insert_reg_separator(regs_num_32_bit, data);
+
 	ret = hns3_get_64_bit_regs(hw, regs_num_64_bit, data);
-	if (ret)
+	if (ret) {
 		hns3_err(hw, "Get 64 bit register failed, ret = %d", ret);
-
+		return ret;
+	}
+	data += regs_num_64_bit * HNS3_64_BIT_REG_SIZE;
+	data += hns3_insert_reg_separator(regs_num_64_bit *
+					  HNS3_64_BIT_REG_SIZE, data);
 	return ret;
 }
-- 
2.7.4


  parent reply	other threads:[~2021-01-14 13:34 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-14 13:33 [dpdk-dev] [PATCH 0/8] TM and some bugfixes for hns3 Lijun Ou
2021-01-14 13:33 ` [dpdk-dev] [PATCH 1/8] net/hns3: use C11 atomics builtins for resetting Lijun Ou
2021-01-14 13:33 ` [dpdk-dev] [PATCH 2/8] net/hns3: support RTE TM get ops function Lijun Ou
2021-01-19  0:49   ` Ferruh Yigit
2021-01-19  8:06     ` oulijun
2021-01-14 13:33 ` [dpdk-dev] [PATCH 3/8] net/hns3: fix VF query link status in dev init Lijun Ou
2021-01-14 13:33 ` [dpdk-dev] [PATCH 4/8] net/hns3: use new opcode for clearing hardware resource Lijun Ou
2021-01-14 13:33 ` [dpdk-dev] [PATCH 5/8] net/hns3: fix register length when dump registers Lijun Ou
2021-01-14 13:33 ` Lijun Ou [this message]
2021-01-14 13:33 ` [dpdk-dev] [PATCH 7/8] net/hns3: fix dump register out of range Lijun Ou
2021-01-14 13:33 ` [dpdk-dev] [PATCH 8/8] net/hns3: remove unused assignment for RSS key Lijun Ou
2021-01-19  0:49 ` [dpdk-dev] [PATCH 0/8] TM and some bugfixes for hns3 Ferruh Yigit

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