diff options
author | Lennert Buytenhek <buytenh@wantstofly.org> | 2008-07-10 08:40:51 -0400 |
---|---|---|
committer | Lennert Buytenhek <buytenh@marvell.com> | 2008-07-24 00:22:51 -0400 |
commit | cd4ccf76bfd2c36d351e68be7e6a597268f98a1a (patch) | |
tree | a9c63d6536d1c49cbb350c238b903a4f05036dcb /drivers/net | |
parent | ae9ae06443f7bfa4f013c0e2c035d549e999ad3e (diff) |
mv643xx_eth: use longer DMA bursts
The mv643xx_eth driver is limiting DMA bursts to 32 bytes, while
using the largest burst size (128 bytes) gives a couple percentage
points performance improvement in throughput tests, and the docs
say that the 128 byte default should not need to be changed, so
use 128 byte bursts instead.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/mv643xx_eth.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index c700c1f494e9..9d200568d88a 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c | |||
@@ -129,21 +129,21 @@ static char mv643xx_eth_driver_version[] = "1.1"; | |||
129 | /* | 129 | /* |
130 | * SDMA configuration register. | 130 | * SDMA configuration register. |
131 | */ | 131 | */ |
132 | #define RX_BURST_SIZE_4_64BIT (2 << 1) | 132 | #define RX_BURST_SIZE_16_64BIT (4 << 1) |
133 | #define BLM_RX_NO_SWAP (1 << 4) | 133 | #define BLM_RX_NO_SWAP (1 << 4) |
134 | #define BLM_TX_NO_SWAP (1 << 5) | 134 | #define BLM_TX_NO_SWAP (1 << 5) |
135 | #define TX_BURST_SIZE_4_64BIT (2 << 22) | 135 | #define TX_BURST_SIZE_16_64BIT (4 << 22) |
136 | 136 | ||
137 | #if defined(__BIG_ENDIAN) | 137 | #if defined(__BIG_ENDIAN) |
138 | #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ | 138 | #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ |
139 | RX_BURST_SIZE_4_64BIT | \ | 139 | RX_BURST_SIZE_16_64BIT | \ |
140 | TX_BURST_SIZE_4_64BIT | 140 | TX_BURST_SIZE_16_64BIT |
141 | #elif defined(__LITTLE_ENDIAN) | 141 | #elif defined(__LITTLE_ENDIAN) |
142 | #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ | 142 | #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ |
143 | RX_BURST_SIZE_4_64BIT | \ | 143 | RX_BURST_SIZE_16_64BIT | \ |
144 | BLM_RX_NO_SWAP | \ | 144 | BLM_RX_NO_SWAP | \ |
145 | BLM_TX_NO_SWAP | \ | 145 | BLM_TX_NO_SWAP | \ |
146 | TX_BURST_SIZE_4_64BIT | 146 | TX_BURST_SIZE_16_64BIT |
147 | #else | 147 | #else |
148 | #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined | 148 | #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined |
149 | #endif | 149 | #endif |