diff options
Diffstat (limited to 'target/linux/rb532/patches/240-via_rhine_performance.patch')
| -rw-r--r-- | target/linux/rb532/patches/240-via_rhine_performance.patch | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/target/linux/rb532/patches/240-via_rhine_performance.patch b/target/linux/rb532/patches/240-via_rhine_performance.patch new file mode 100644 index 0000000000..e7cdf8ae24 --- /dev/null +++ b/target/linux/rb532/patches/240-via_rhine_performance.patch @@ -0,0 +1,94 @@ +diff -ur linux.old/drivers/net/via-rhine.c linux.dev/drivers/net/via-rhine.c +--- linux.old/drivers/net/via-rhine.c 2006-11-29 22:57:37.000000000 +0100 ++++ linux.dev/drivers/net/via-rhine.c 2006-12-14 03:39:01.000000000 +0100 +@@ -33,6 +33,7 @@ + #define DRV_VERSION "1.4.3" + #define DRV_RELDATE "2007-03-06" + ++#define PKT_ALIGN 1 + + /* A few user-configurable values. + These may be modified when a driver module is loaded. */ +@@ -40,9 +41,11 @@ + static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */ + static int max_interrupt_work = 20; + ++#ifndef PKT_ALIGN + /* Set the copy breakpoint for the copy-only-tiny-frames scheme. + Setting to > 1518 effectively disables this feature. */ + static int rx_copybreak; ++#endif + + /* Work-around for broken BIOSes: they are unable to get the chip back out of + power state D3 so PXE booting fails. bootparam(7): via-rhine.avoid_D3=1 */ +@@ -105,6 +108,7 @@ + #include <asm/io.h> + #include <asm/irq.h> + #include <asm/uaccess.h> ++#include <asm/unaligned.h> + #include <linux/dmi.h> + + /* These identify the driver base version and may not be removed. */ +@@ -124,12 +128,14 @@ + + module_param(max_interrupt_work, int, 0); + module_param(debug, int, 0); +-module_param(rx_copybreak, int, 0); + module_param(avoid_D3, bool, 0); + MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt"); + MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)"); +-MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames"); + MODULE_PARM_DESC(avoid_D3, "Avoid power state D3 (work-around for broken BIOSes)"); ++#ifndef PKT_ALIGN ++module_param(rx_copybreak, int, 0); ++MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames"); ++#endif + + /* + Theory of Operation +@@ -924,7 +930,7 @@ + + /* Fill in the Rx buffers. Handle allocation failure gracefully. */ + for (i = 0; i < RX_RING_SIZE; i++) { +- struct sk_buff *skb = dev_alloc_skb(rp->rx_buf_sz); ++ struct sk_buff *skb = dev_alloc_skb(rp->rx_buf_sz + 4); + rp->rx_skbuff[i] = skb; + if (skb == NULL) + break; +@@ -1482,6 +1488,9 @@ + /* Length should omit the CRC */ + int pkt_len = data_size - 4; + ++#ifdef PKT_ALIGN ++ int i; ++#else + /* Check if the packet is long enough to accept without + copying to a minimally-sized skbuff. */ + if (pkt_len < rx_copybreak && +@@ -1501,7 +1510,9 @@ + rp->rx_skbuff_dma[entry], + rp->rx_buf_sz, + PCI_DMA_FROMDEVICE); +- } else { ++ } else ++#endif ++ { + skb = rp->rx_skbuff[entry]; + if (skb == NULL) { + printk(KERN_ERR "%s: Inconsistent Rx " +@@ -1515,6 +1526,14 @@ + rp->rx_skbuff_dma[entry], + rp->rx_buf_sz, + PCI_DMA_FROMDEVICE); ++#ifdef PKT_ALIGN ++ /* align the data to the ip header - should be faster than copying the entire packet */ ++ for (i = pkt_len - (pkt_len % 4); i >= 0; i -= 4) { ++ put_unaligned(*((u32 *) (skb->data + i)), (u32 *) (skb->data + i + 2)); ++ } ++ skb->data += 2; ++ skb->tail += 2; ++#endif + } + skb->protocol = eth_type_trans(skb, dev); + #ifdef CONFIG_VIA_RHINE_NAPI + |