[kernel] also strip the .notes section of the kernel
[openwrt.git] / target / linux / rb532 / patches-2.6.24 / 240-via_rhine_performance.patch
1 --- a/drivers/net/via-rhine.c
2 +++ b/drivers/net/via-rhine.c
3 @@ -33,6 +33,8 @@
4  #define DRV_VERSION    "1.4.3"
5  #define DRV_RELDATE    "2007-03-06"
6  
7 +#define PKT_ALIGN 1
8 +
9  
10  /* A few user-configurable values.
11     These may be modified when a driver module is loaded. */
12 @@ -40,6 +42,7 @@
13  static int debug = 1;  /* 1 normal messages, 0 quiet .. 7 verbose. */
14  static int max_interrupt_work = 20;
15  
16 +#ifndef PKT_ALIGN
17  /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
18     Setting to > 1518 effectively disables this feature. */
19  #if defined(__alpha__) || defined(__arm__) || defined(__hppa__) \
20 @@ -49,6 +52,7 @@ static int rx_copybreak = 1518;
21  #else
22  static int rx_copybreak;
23  #endif
24 +#endif /* PKT_ALIGN */
25  
26  /* Work-around for broken BIOSes: they are unable to get the chip back out of
27     power state D3 so PXE booting fails. bootparam(7): via-rhine.avoid_D3=1 */
28 @@ -111,6 +115,7 @@ static const int multicast_filter_limit 
29  #include <asm/io.h>
30  #include <asm/irq.h>
31  #include <asm/uaccess.h>
32 +#include <asm/unaligned.h>
33  #include <linux/dmi.h>
34  
35  /* These identify the driver base version and may not be removed. */
36 @@ -130,12 +135,14 @@ MODULE_LICENSE("GPL");
37  
38  module_param(max_interrupt_work, int, 0);
39  module_param(debug, int, 0);
40 -module_param(rx_copybreak, int, 0);
41  module_param(avoid_D3, bool, 0);
42  MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt");
43  MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)");
44 -MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames");
45  MODULE_PARM_DESC(avoid_D3, "Avoid power state D3 (work-around for broken BIOSes)");
46 +#ifndef PKT_ALIGN
47 +module_param(rx_copybreak, int, 0);
48 +MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames");
49 +#endif
50  
51  /*
52                 Theory of Operation
53 @@ -922,7 +929,7 @@ static void alloc_rbufs(struct net_devic
54  
55         /* Fill in the Rx buffers.  Handle allocation failure gracefully. */
56         for (i = 0; i < RX_RING_SIZE; i++) {
57 -               struct sk_buff *skb = dev_alloc_skb(rp->rx_buf_sz);
58 +               struct sk_buff *skb = dev_alloc_skb(rp->rx_buf_sz + 4);
59                 rp->rx_skbuff[i] = skb;
60                 if (skb == NULL)
61                         break;
62 @@ -1485,7 +1492,9 @@ static int rhine_rx(struct net_device *d
63                         struct sk_buff *skb;
64                         /* Length should omit the CRC */
65                         int pkt_len = data_size - 4;
66 -
67 +#ifdef PKT_ALIGN
68 +                       int i;
69 +#else
70                         /* Check if the packet is long enough to accept without
71                            copying to a minimally-sized skbuff. */
72                         if (pkt_len < rx_copybreak &&
73 @@ -1504,7 +1513,9 @@ static int rhine_rx(struct net_device *d
74                                                                rp->rx_skbuff_dma[entry],
75                                                                rp->rx_buf_sz,
76                                                                PCI_DMA_FROMDEVICE);
77 -                       } else {
78 +                       } else
79 +#endif
80 +                       {
81                                 skb = rp->rx_skbuff[entry];
82                                 if (skb == NULL) {
83                                         printk(KERN_ERR "%s: Inconsistent Rx "
84 @@ -1518,6 +1529,14 @@ static int rhine_rx(struct net_device *d
85                                                  rp->rx_skbuff_dma[entry],
86                                                  rp->rx_buf_sz,
87                                                  PCI_DMA_FROMDEVICE);
88 +#ifdef PKT_ALIGN
89 +                               /* align the data to the ip header - should be faster than copying the entire packet */
90 +                               for (i = pkt_len - (pkt_len % 4); i >= 0; i -= 4) {
91 +                                       put_unaligned(*((u32 *) (skb->data + i)), (u32 *) (skb->data + i + 2));
92 +                               }
93 +                               skb->data += 2;
94 +                               skb->tail += 2;
95 +#endif
96                         }
97                         skb->protocol = eth_type_trans(skb, dev);
98  #ifdef CONFIG_VIA_RHINE_NAPI