diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2013-07-04 23:11:22 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2013-07-04 23:11:22 +0200 |
| commit | 2b0f89317e99735bbf32eaede81f707f98ab1b5e (patch) | |
| tree | 16daa236e21876b11f1c0b9256cd4046aadba020 /drivers/net/ethernet/sfc/net_driver.h | |
| parent | 07bd1172902e782f288e4d44b1fde7dec0f08b6f (diff) | |
| parent | fa18f7bde3ad4568d1d343b60d963bfbd8dc3991 (diff) | |
Merge branch 'timers/posix-cpu-timers-for-tglx' of
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/core
Frederic sayed: "Most of these patches have been hanging around for
several month now, in -mmotm for a significant chunk. They already
missed a few releases."
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/net/ethernet/sfc/net_driver.h')
| -rw-r--r-- | drivers/net/ethernet/sfc/net_driver.h | 31 |
1 files changed, 15 insertions, 16 deletions
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h index 9bd433a095c..39d6bd77f01 100644 --- a/drivers/net/ethernet/sfc/net_driver.h +++ b/drivers/net/ethernet/sfc/net_driver.h @@ -72,8 +72,20 @@ /* Maximum possible MTU the driver supports */ #define EFX_MAX_MTU (9 * 1024) -/* Size of an RX scatter buffer. Small enough to pack 2 into a 4K page. */ -#define EFX_RX_USR_BUF_SIZE 1824 +/* Size of an RX scatter buffer. Small enough to pack 2 into a 4K page, + * and should be a multiple of the cache line size. + */ +#define EFX_RX_USR_BUF_SIZE (2048 - 256) + +/* If possible, we should ensure cache line alignment at start and end + * of every buffer. Otherwise, we just need to ensure 4-byte + * alignment of the network header. + */ +#if NET_IP_ALIGN == 0 +#define EFX_RX_BUF_ALIGNMENT L1_CACHE_BYTES +#else +#define EFX_RX_BUF_ALIGNMENT 4 +#endif /* Forward declare Precision Time Protocol (PTP) support structure. */ struct efx_ptp_data; @@ -468,24 +480,11 @@ enum nic_state { }; /* - * Alignment of page-allocated RX buffers - * - * Controls the number of bytes inserted at the start of an RX buffer. - * This is the equivalent of NET_IP_ALIGN [which controls the alignment - * of the skb->head for hardware DMA]. - */ -#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS -#define EFX_PAGE_IP_ALIGN 0 -#else -#define EFX_PAGE_IP_ALIGN NET_IP_ALIGN -#endif - -/* * Alignment of the skb->head which wraps a page-allocated RX buffer * * The skb allocated to wrap an rx_buffer can have this alignment. Since * the data is memcpy'd from the rx_buf, it does not need to be equal to - * EFX_PAGE_IP_ALIGN. + * NET_IP_ALIGN. */ #define EFX_PAGE_SKB_ALIGN 2 |