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Message-Id: <1388726310-2996-7-git-send-email-jeffrey.t.kirsher@intel.com>
Date: Thu, 2 Jan 2014 21:18:25 -0800
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Mark Rustad <mark.d.rustad@...el.com>, netdev@...r.kernel.org,
gospo@...hat.com, sassmann@...hat.com, bhutchings@...arflare.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next v2 06/11] ixgbe: Check for adapter removal on register writes
From: Mark Rustad <mark.d.rustad@...el.com>
Prevent writes to an adapter that has been detected as removed
by a previous failing read. This also fixes some include file
ordering confusion that this patch revealed.
Signed-off-by: Mark Rustad <mark.d.rustad@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/ixgbe/ixgbe.h | 5 +++++
drivers/net/ethernet/intel/ixgbe/ixgbe_common.h | 12 ++++++++++--
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 6 ++++++
drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.c | 3 +--
drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c | 2 +-
5 files changed, 23 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index 002c9e2..8a4b03b 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -257,6 +257,9 @@ struct ixgbe_ring {
};
unsigned long last_rx_timestamp;
unsigned long state;
+#ifdef CONFIG_IXGBE_LER
+ u8 __iomem **adapter_present; /* Points to hw_addr in ixgbe_hw */
+#endif /* CONFIG_IXGBE_LER */
u8 __iomem *tail;
dma_addr_t dma; /* phys. address of descriptor ring */
unsigned int size; /* length in bytes */
@@ -587,6 +590,8 @@ static inline u16 ixgbe_desc_unused(struct ixgbe_ring *ring)
static inline void ixgbe_write_tail(struct ixgbe_ring *ring, u32 value)
{
+ if (IXGBE_REMOVED(*ring->adapter_present))
+ return;
writel(value, ring->tail);
}
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h
index 551025a..b07a887 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h
@@ -135,7 +135,11 @@ void ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg);
static inline void IXGBE_WRITE_REG(struct ixgbe_hw *hw, u32 reg, u32 value)
{
- writel(value, hw->hw_addr + reg);
+ u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
+
+ if (IXGBE_REMOVED(reg_addr))
+ return;
+ writel(value, reg_addr + reg);
}
#ifndef writeq
@@ -145,7 +149,11 @@ static inline void IXGBE_WRITE_REG(struct ixgbe_hw *hw, u32 reg, u32 value)
static inline void IXGBE_WRITE_REG64(struct ixgbe_hw *hw, u32 reg, u64 value)
{
- writeq(value, hw->hw_addr + reg);
+ u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
+
+ if (IXGBE_REMOVED(reg_addr))
+ return;
+ writeq(value, reg_addr + reg);
}
static inline u32 IXGBE_READ_REG(struct ixgbe_hw *hw, u32 reg)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 0f0ca66..22e51d1 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -3001,6 +3001,9 @@ void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
ring->count * sizeof(union ixgbe_adv_tx_desc));
IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
+#ifdef CONFIG_IXGBE_LER
+ ring->adapter_present = &hw->hw_addr;
+#endif /* CONFIG_IXGBE_LER */
ring->tail = adapter->io_addr + IXGBE_TDT(reg_idx);
/*
@@ -3404,6 +3407,9 @@ void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
ring->count * sizeof(union ixgbe_adv_rx_desc));
IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
+#ifdef CONFIG_IXGBE_LER
+ ring->adapter_present = &hw->hw_addr;
+#endif /* CONFIG_IXGBE_LER */
ring->tail = adapter->io_addr + IXGBE_RDT(reg_idx);
ixgbe_configure_srrctl(adapter, ring);
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.c
index d4a64e6..cc3101a 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.c
@@ -27,8 +27,7 @@
#include <linux/pci.h>
#include <linux/delay.h>
-#include "ixgbe_type.h"
-#include "ixgbe_common.h"
+#include "ixgbe.h"
#include "ixgbe_mbx.h"
/**
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
index 39217e5..132557c 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
@@ -29,7 +29,7 @@
#include <linux/delay.h>
#include <linux/sched.h>
-#include "ixgbe_common.h"
+#include "ixgbe.h"
#include "ixgbe_phy.h"
static void ixgbe_i2c_start(struct ixgbe_hw *hw);
--
1.8.3.1
--
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