net/i40e: fix X710 Rx after reading some registers

There's an issue that X710 can't receive any packet after
reading some special registers. That's because these
registers are only valid for X722, read access for non-X722
will cause ECC error.

Fixes: d9efd0136ac1 ("i40e: add EEPROM and registers dumping")
Cc: stable@dpdk.org
Signed-off-by: Beilei Xing <beilei.xing@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 790ecc3..3628d7f 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -11609,6 +11609,32 @@ i40e_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
        return 0;
 }
 
+/**
+ * This function is used to check if the register is valid.
+ * Below is the valid registers list for X722 only:
+ * 0x2b800--0x2bb00
+ * 0x38700--0x38a00
+ * 0x3d800--0x3db00
+ * 0x208e00--0x209000
+ * 0x20be00--0x20c000
+ * 0x263c00--0x264000
+ * 0x265c00--0x266000
+ */
+static inline int i40e_valid_regs(enum i40e_mac_type type, uint32_t reg_offset)
+{
+       if ((type != I40E_MAC_X722) &&
+           ((reg_offset >= 0x2b800 && reg_offset <= 0x2bb00) ||
+            (reg_offset >= 0x38700 && reg_offset <= 0x38a00) ||
+            (reg_offset >= 0x3d800 && reg_offset <= 0x3db00) ||
+            (reg_offset >= 0x208e00 && reg_offset <= 0x209000) ||
+            (reg_offset >= 0x20be00 && reg_offset <= 0x20c000) ||
+            (reg_offset >= 0x263c00 && reg_offset <= 0x264000) ||
+            (reg_offset >= 0x265c00 && reg_offset <= 0x266000)))
+               return 0;
+       else
+               return 1;
+}
+
 static int i40e_get_regs(struct rte_eth_dev *dev,
                         struct rte_dev_reg_info *regs)
 {
@@ -11650,8 +11676,11 @@ static int i40e_get_regs(struct rte_eth_dev *dev,
                                reg_offset = arr_idx * reg_info->stride1 +
                                        arr_idx2 * reg_info->stride2;
                                reg_offset += reg_info->base_addr;
-                               ptr_data[reg_offset >> 2] =
-                                       I40E_READ_REG(hw, reg_offset);
+                               if (!i40e_valid_regs(hw->mac.type, reg_offset))
+                                       ptr_data[reg_offset >> 2] = 0;
+                               else
+                                       ptr_data[reg_offset >> 2] =
+                                               I40E_READ_REG(hw, reg_offset);
                        }
        }