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net: lan743x: Modify the EEPROM and OTP size for PCI1xxxx devices 

Maximum OTP and EEPROM size for hearthstone PCI1xxxx devices are 8 Kb
and 64 Kb respectively. Adjust max size definitions and return correct
EEPROM length based on device. Also prevent out-of-bound read/write.

Signed-off-by: Rengarajan S <rengarajan.s@microchip.com>
Link: https://patch.msgid.link/20250523173326.18509-1-rengarajan.s@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Rengarajan S 2025-05-23 23:03:26 +05:30 committed by Jakub Kicinski
parent 7a91722e0d
commit 3b9935586a
1 changed files with 16 additions and 2 deletions
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18
drivers/net/ethernet/microchip/lan743x_ethtool.c
View File

@ -18,6 +18,8 @@
#define EEPROM_MAC_OFFSET (0x01)
#define MAX_EEPROM_SIZE (512)
#define MAX_OTP_SIZE (1024)
#define MAX_HS_OTP_SIZE (8 * 1024)
#define MAX_HS_EEPROM_SIZE (64 * 1024)
#define OTP_INDICATOR_1 (0xF3)
#define OTP_INDICATOR_2 (0xF7)
@ -272,6 +274,9 @@ static int lan743x_hs_otp_read(struct lan743x_adapter *adapter, u32 offset,
int ret;
int i;
if (offset + length > MAX_HS_OTP_SIZE)
return -EINVAL;
ret = lan743x_hs_syslock_acquire(adapter, LOCK_TIMEOUT_MAX_CNT);
if (ret < 0)
return ret;
@ -320,6 +325,9 @@ static int lan743x_hs_otp_write(struct lan743x_adapter *adapter, u32 offset,
int ret;
int i;
if (offset + length > MAX_HS_OTP_SIZE)
return -EINVAL;
ret = lan743x_hs_syslock_acquire(adapter, LOCK_TIMEOUT_MAX_CNT);
if (ret < 0)
return ret;
@ -497,6 +505,9 @@ static int lan743x_hs_eeprom_read(struct lan743x_adapter *adapter,
u32 val;
int i;
if (offset + length > MAX_HS_EEPROM_SIZE)
return -EINVAL;
retval = lan743x_hs_syslock_acquire(adapter, LOCK_TIMEOUT_MAX_CNT);
if (retval < 0)
return retval;
@ -539,6 +550,9 @@ static int lan743x_hs_eeprom_write(struct lan743x_adapter *adapter,
u32 val;
int i;
if (offset + length > MAX_HS_EEPROM_SIZE)
return -EINVAL;
retval = lan743x_hs_syslock_acquire(adapter, LOCK_TIMEOUT_MAX_CNT);
if (retval < 0)
return retval;
@ -604,9 +618,9 @@ static int lan743x_ethtool_get_eeprom_len(struct net_device *netdev)
struct lan743x_adapter *adapter = netdev_priv(netdev);
if (adapter->flags & LAN743X_ADAPTER_FLAG_OTP)
return MAX_OTP_SIZE;
return adapter->is_pci11x1x ? MAX_HS_OTP_SIZE : MAX_OTP_SIZE;
return MAX_EEPROM_SIZE;
return adapter->is_pci11x1x ? MAX_HS_EEPROM_SIZE : MAX_EEPROM_SIZE;
}
static int lan743x_ethtool_get_eeprom(struct net_device *netdev,