From f4a66897e77277335ae98ffeb1f4ebb9cf24ed6d Mon Sep 17 00:00:00 2001
From: Vladislav Zolotarov <vladz@broadcom.com>
Date: Tue, 19 Oct 2010 05:13:09 +0000
Subject: [PATCH] bnx2x: prevent false parity error in MSI-X memory of HC block
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/bnx2x/bnx2x_main.c | 28 +++++++++++++++++++++++++++-
drivers/net/bnx2x/bnx2x_reg.h | 6 +++++-
2 files changed, 32 insertions(+), 2 deletions(-)
diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c
index 3f49b551ff05..f22e283cabef 100644
--- a/drivers/net/bnx2x/bnx2x_main.c
+++ b/drivers/net/bnx2x/bnx2x_main.c
@@ -5457,7 +5457,8 @@ static int bnx2x_init_hw_func(struct bnx2x *bp)
struct bnx2x_ilt *ilt = BP_ILT(bp);
u16 cdu_ilt_start;
u32 addr, val;
- int i;
+ u32 main_mem_base, main_mem_size, main_mem_prty_clr;
+ int i, main_mem_width;
DP(BNX2X_MSG_MCP, "starting func init func %d\n", func);
@@ -5706,6 +5707,31 @@ static int bnx2x_init_hw_func(struct bnx2x *bp)
bnx2x_init_block(bp, MCP_BLOCK, FUNC0_STAGE + func);
bnx2x_init_block(bp, DMAE_BLOCK, FUNC0_STAGE + func);
+ if (CHIP_IS_E1x(bp)) {
+ main_mem_size = HC_REG_MAIN_MEMORY_SIZE / 2; /*dwords*/
+ main_mem_base = HC_REG_MAIN_MEMORY +
+ BP_PORT(bp) * (main_mem_size * 4);
+ main_mem_prty_clr = HC_REG_HC_PRTY_STS_CLR;
+ main_mem_width = 8;
+
+ val = REG_RD(bp, main_mem_prty_clr);
+ if (val)
+ DP(BNX2X_MSG_MCP, "Hmmm... Parity errors in HC "
+ "block during "
+ "function init (0x%x)!\n", val);
+
+ /* Clear "false" parity errors in MSI-X table */
+ for (i = main_mem_base;
+ i < main_mem_base + main_mem_size * 4;
+ i += main_mem_width) {
+ bnx2x_read_dmae(bp, i, main_mem_width / 4);
+ bnx2x_write_dmae(bp, bnx2x_sp_mapping(bp, wb_data),
+ i, main_mem_width / 4);
+ }
+ /* Clear HC parity attention */
+ REG_RD(bp, main_mem_prty_clr);
+ }
+
bnx2x_phy_probe(&bp->link_params);
return 0;
diff --git a/drivers/net/bnx2x/bnx2x_reg.h b/drivers/net/bnx2x/bnx2x_reg.h
index 18a86284ebcc..1cefe489a955 100644
--- a/drivers/net/bnx2x/bnx2x_reg.h
+++ b/drivers/net/bnx2x/bnx2x_reg.h
@@ -800,9 +800,13 @@
#define HC_REG_HC_PRTY_MASK 0x1080a0
/* [R 3] Parity register #0 read */
#define HC_REG_HC_PRTY_STS 0x108094
-#define HC_REG_INT_MASK 0x108108
+/* [RC 3] Parity register #0 read clear */
+#define HC_REG_HC_PRTY_STS_CLR 0x108098
+#define HC_REG_INT_MASK 0x108108
#define HC_REG_LEADING_EDGE_0 0x108040
#define HC_REG_LEADING_EDGE_1 0x108048
+#define HC_REG_MAIN_MEMORY 0x108800
+#define HC_REG_MAIN_MEMORY_SIZE 152
#define HC_REG_P0_PROD_CONS 0x108200
#define HC_REG_P1_PROD_CONS 0x108400
#define HC_REG_PBA_COMMAND 0x108140
--
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