3 files changed, 82 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h
index 2e27bd90e31c..3da3a9904d56 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k.h
+++ b/drivers/net/ethernet/intel/fm10k/fm10k.h
@@ -27,7 +27,14 @@
 #include <linux/if_vlan.h>
 #include <linux/pci.h>
 
-#include "fm10k_type.h"
+#include "fm10k_common.h"
+
+struct fm10k_intfc {
+	struct pci_dev *pdev;
+
+	struct fm10k_hw hw;
+	u32 __iomem *uc_addr;
+};
 
 /* main */
 extern char fm10k_driver_name[];
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_common.h b/drivers/net/ethernet/intel/fm10k/fm10k_common.h
new file mode 100644
index 000000000000..2b214a6a4adb
--- /dev/null
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_common.h
@@ -0,0 +1,44 @@
+/* Intel Ethernet Switch Host Interface Driver
+ * Copyright(c) 2013 - 2014 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Contact Information:
+ * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ */
+
+#ifndef _FM10K_COMMON_H_
+#define _FM10K_COMMON_H_
+
+#include "fm10k_type.h"
+
+#define FM10K_REMOVED(hw_addr) unlikely(!(hw_addr))
+
+/* PCI configuration read */
+u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg);
+
+/* read operations, indexed using DWORDS */
+u32 fm10k_read_reg(struct fm10k_hw *hw, int reg);
+
+/* write operations, indexed using DWORDS */
+#define fm10k_write_reg(hw, reg, val) \
+do { \
+	u32 __iomem *hw_addr = ACCESS_ONCE((hw)->hw_addr); \
+	if (!FM10K_REMOVED(hw_addr)) \
+		writel((val), &hw_addr[(reg)]); \
+} while (0)
+
+/* read ctrl register which has no clear on read fields as PCIe flush */
+#define fm10k_write_flush(hw) fm10k_read_reg((hw), FM10K_CTRL)
+#endif /* _FM10K_COMMON_H_ */
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
index 12089cedbe56..6d5e33cde6a7 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
@@ -38,6 +38,36 @@ static const struct pci_device_id fm10k_pci_tbl[] = {
 };
 MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
 
+u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
+{
+	struct fm10k_intfc *interface = hw->back;
+	u16 value = 0;
+
+	if (FM10K_REMOVED(hw->hw_addr))
+		return ~value;
+
+	pci_read_config_word(interface->pdev, reg, &value);
+	if (value == 0xFFFF)
+		fm10k_write_flush(hw);
+
+	return value;
+}
+
+u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
+{
+	u32 __iomem *hw_addr = ACCESS_ONCE(hw->hw_addr);
+	u32 value = 0;
+
+	if (FM10K_REMOVED(hw_addr))
+		return ~value;
+
+	value = readl(&hw_addr[reg]);
+	if (!(~value) && (!reg || !(~readl(hw_addr))))
+		hw->hw_addr = NULL;
+
+	return value;
+}
+
 /**
  * fm10k_probe - Device Initialization Routine
  * @pdev: PCI device information struct