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Message-Id: <1438586918-12689-1-git-send-email-corcodel.marian@gmail.com>
Date: Mon, 3 Aug 2015 10:28:38 +0300
From: Corcodel Marian <corcodel.marian@...il.com>
To: netdev@...r.kernel.org
Cc: Corcodel Marian <corcodel.marian@...il.com>
Subject: [PATCH] r8169: Permit users to change transmit and receive max pachet size
Realtek nic its very versatile and have more registers for
optimise and solve different issues. I added 2 parameters rx_buf_sz and
txpacketmax 1.Parameter rx_buf_sz represent Receive Packet Maximum size and
on this program is 16383 bytes, eg RTL 8101E use 16000 and user may use
alls values up to maximum but value great from zero. If a received packet
of packet length larger than the value set here, then it will set both RWT
and RES bits in the corresponding Rx Status Descriptor. If the packet, which
is larger than the RMS value, is received without CRC error, it is still a
good packet, although both RWT and RES bits are set in the corresponding Rx
Status Descriptor. 2. Parameter txpacketmax represent Max Transmit Packet
Size value must be on range 1-63.Do not put zero on any situation.Every
field from range 1-63 have 128 bytes. For regular LAN applications, i.e.,
the max packet size is either 1518 or 1522 (VLAN) bytes, this field must be
larger than the max packet size. E.g., 0x0C. On mee working good with
txpacketmax=60 and rx_buf_sz=1600
Signed-off-by: Corcodel Marian <corcodel.marian@...il.com>
---
drivers/net/ethernet/realtek/r8169.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 3df51fa..5a942c5 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -345,6 +345,7 @@ static const struct pci_device_id rtl8169_pci_tbl[] = {
MODULE_DEVICE_TABLE(pci, rtl8169_pci_tbl);
static int rx_buf_sz = 16383;
+static int txpacketmax = 63;
static int use_dac;
static struct {
u32 msg_enable;
@@ -406,7 +407,7 @@ enum rtl_registers {
MaxTxPacketSize = 0xec, /* 8101/8168. Unit of 128 bytes. */
-#define TxPacketMax (8064 >> 7)
+//#define TxPacketMax (8064 >> 7)
#define EarlySize 0x27
FuncEvent = 0xf0,
@@ -850,6 +851,10 @@ module_param(use_dac, int, 0);
MODULE_PARM_DESC(use_dac, "Enable PCI DAC. Unsafe on 32 bit PCI slot.");
module_param_named(debug, debug.msg_enable, int, 0);
MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
+module_param(rx_buf_sz, int, 0);
+MODULE_PARM_DESC(rx_buf_sz, "Receive Packet Maximum Size. ");
+module_param(txpacketmax, int, 0);
+MODULE_PARM_DESC(txpacketmax, "Max Transmit Packet Size. ");
MODULE_LICENSE("GPL");
MODULE_VERSION(RTL8169_VERSION);
MODULE_FIRMWARE(FIRMWARE_8168D_1);
@@ -5593,7 +5598,7 @@ static void rtl_hw_start_8168bef(struct rtl8169_private *tp)
rtl_hw_start_8168bb(tp);
- RTL_W8(MaxTxPacketSize, TxPacketMax);
+ RTL_W8(MaxTxPacketSize, txpacketmax);
RTL_W8(Config4, RTL_R8(Config4) & ~(1 << 0));
}
@@ -5659,7 +5664,7 @@ static void rtl_hw_start_8168cp_3(struct rtl8169_private *tp)
/* Magic. */
RTL_W8(DBG_REG, 0x20);
- RTL_W8(MaxTxPacketSize, TxPacketMax);
+ RTL_W8(MaxTxPacketSize, txpacketmax);
if (tp->dev->mtu <= ETH_DATA_LEN)
rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
@@ -5720,7 +5725,7 @@ static void rtl_hw_start_8168d(struct rtl8169_private *tp)
rtl_disable_clock_request(pdev);
- RTL_W8(MaxTxPacketSize, TxPacketMax);
+ RTL_W8(MaxTxPacketSize, txpacketmax);
if (tp->dev->mtu <= ETH_DATA_LEN)
rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
@@ -5738,7 +5743,7 @@ static void rtl_hw_start_8168dp(struct rtl8169_private *tp)
if (tp->dev->mtu <= ETH_DATA_LEN)
rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
- RTL_W8(MaxTxPacketSize, TxPacketMax);
+ RTL_W8(MaxTxPacketSize, txpacketmax);
rtl_disable_clock_request(pdev);
}
@@ -5758,7 +5763,7 @@ static void rtl_hw_start_8168d_4(struct rtl8169_private *tp)
rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
- RTL_W8(MaxTxPacketSize, TxPacketMax);
+ RTL_W8(MaxTxPacketSize, txpacketmax);
for (i = 0; i < ARRAY_SIZE(e_info_8168d_4); i++) {
const struct ephy_info *e = e_info_8168d_4 + i;
@@ -5798,7 +5803,7 @@ static void rtl_hw_start_8168e_1(struct rtl8169_private *tp)
if (tp->dev->mtu <= ETH_DATA_LEN)
rtl_tx_performance_tweak(pdev, 0x5 << MAX_READ_REQUEST_SHIFT);
- RTL_W8(MaxTxPacketSize, TxPacketMax);
+ RTL_W8(MaxTxPacketSize, txpacketmax);
rtl_disable_clock_request(pdev);
@@ -6227,7 +6232,7 @@ static void rtl_hw_start_8168(struct net_device *dev)
RTL_W8(Cfg9346, Cfg9346_Unlock);
- RTL_W8(MaxTxPacketSize, TxPacketMax);
+ RTL_W8(MaxTxPacketSize, txpacketmax);
rtl_set_rx_max_size(ioaddr, rx_buf_sz);
@@ -6521,7 +6526,7 @@ static void rtl_hw_start_8101(struct net_device *dev)
RTL_W8(Cfg9346, Cfg9346_Unlock);
- RTL_W8(MaxTxPacketSize, TxPacketMax);
+ RTL_W8(MaxTxPacketSize, txpacketmax);
rtl_set_rx_max_size(ioaddr, rx_buf_sz);
--
2.1.4
--
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