dpdk/0016-net-hns3-fix-data-overwriting-during-register-dump.patch

From 3c4b289d438451fa8e3c520bef4b1a32d68f4bea Mon Sep 17 00:00:00 2001
From: Chengchang Tang <tangchengchang@huawei.com>
Date: Thu, 14 Jan 2021 21:33:35 +0800
Subject: [PATCH 016/189] net/hns3: fix data overwriting during register dump

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