cxgb3: Remove seeprom_write and use VPD API

Using the VPD API allows to simplify the code and completely get
rid of t3_seeprom_write().

Link: https://lore.kernel.org/r/a0291004-dda3-ea08-4d6c-a2f8826c8527@gmail.comSigned-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/chelsio/cxgb3/common.h

@@ -676,7 +676,6 @@ void t3_link_changed(struct adapter *adapter, int port_id);
 void t3_link_fault(struct adapter *adapter, int port_id);
 int t3_link_start(struct cphy *phy, struct cmac *mac, struct link_config *lc);
 const struct adapter_info *t3_get_adapter_info(unsigned int board_id);
-int t3_seeprom_write(struct adapter *adapter, u32 addr, __le32 data);
 int t3_seeprom_wp(struct adapter *adapter, int enable);
 int t3_get_tp_version(struct adapter *adapter, u32 *vers);
 int t3_check_tpsram_version(struct adapter *adapter);

drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c

@@ -2054,7 +2054,6 @@ static int set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
 	struct port_info *pi = netdev_priv(dev);
 	struct adapter *adapter = pi->adapter;
 	u32 aligned_offset, aligned_len;
-	__le32 *p;
 	u8 *buf;
 	int err;
 
@@ -2080,17 +2079,13 @@ static int set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
 	if (err)
 		goto out;
 
-	for (p = (__le32 *) buf; !err && aligned_len; aligned_len -= 4, p++) {
-		err = t3_seeprom_write(adapter, aligned_offset, *p);
-		aligned_offset += 4;
-	}
-
-	if (!err)
+	err = pci_write_vpd(adapter->pdev, aligned_offset, aligned_len, buf);
+	if (err >= 0)
 		err = t3_seeprom_wp(adapter, 1);
 out:
 	if (buf != data)
 		kfree(buf);
-	return err;
+	return err < 0 ? err : 0;
 }
 
 static void get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)

drivers/net/ethernet/chelsio/cxgb3/t3_hw.c

@@ -595,44 +595,9 @@ struct t3_vpd {
 	u32 pad;		/* for multiple-of-4 sizing and alignment */
 };
 
-#define EEPROM_MAX_POLL   40
 #define EEPROM_STAT_ADDR  0x4000
 #define VPD_BASE          0xc00
 
-/**
- *	t3_seeprom_write - write a VPD EEPROM location
- *	@adapter: adapter to write
- *	@addr: EEPROM address
- *	@data: value to write
- *
- *	Write a 32-bit word to a location in VPD EEPROM using the card's PCI
- *	VPD ROM capability.
- */
-int t3_seeprom_write(struct adapter *adapter, u32 addr, __le32 data)
-{
-	u16 val;
-	int attempts = EEPROM_MAX_POLL;
-	unsigned int base = adapter->params.pci.vpd_cap_addr;
-
-	if ((addr >= EEPROMSIZE && addr != EEPROM_STAT_ADDR) || (addr & 3))
-		return -EINVAL;
-
-	pci_write_config_dword(adapter->pdev, base + PCI_VPD_DATA,
-			       le32_to_cpu(data));
-	pci_write_config_word(adapter->pdev,base + PCI_VPD_ADDR,
-			      addr | PCI_VPD_ADDR_F);
-	do {
-		msleep(1);
-		pci_read_config_word(adapter->pdev, base + PCI_VPD_ADDR, &val);
-	} while ((val & PCI_VPD_ADDR_F) && --attempts);
-
-	if (val & PCI_VPD_ADDR_F) {
-		CH_ERR(adapter, "write to EEPROM address 0x%x failed\n", addr);
-		return -EIO;
-	}
-	return 0;
-}
-
 /**
  *	t3_seeprom_wp - enable/disable EEPROM write protection
  *	@adapter: the adapter