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| author | Nicolas Ferre <nicolas.ferre@atmel.com> | 2012-11-23 03:49:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-23 14:29:51 -0500 |
| commit | b3e3bd71b429c04490d6a57671f2bbe2121d4f5a (patch) | |
| tree | e11921016138e5c9972524e1e1243ba0dfca501a | |
| parent | 452b5ecda0f99a15d6900dd9f845b8a0c09b5aca (diff) | |
| download | linux-3.10-b3e3bd71b429c04490d6a57671f2bbe2121d4f5a.tar.gz linux-3.10-b3e3bd71b429c04490d6a57671f2bbe2121d4f5a.tar.bz2 linux-3.10-b3e3bd71b429c04490d6a57671f2bbe2121d4f5a.zip | |
net/macb: GEM DMA configuration register update
Add information to the DMA Configuration Register to
maximize system performance:
- rx/tx packet buffer full memory size
- allow possibility to use INCR16 if supported
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Joachim Eastwood <manabian@gmail.com
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.c | 10 | ||||
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.h | 11 |
2 files changed, 19 insertions, 2 deletions
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c index cc6e593dd65..6a59bce38a8 100644 --- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -1033,8 +1033,12 @@ static u32 macb_dbw(struct macb *bp) } /* - * Configure the receive DMA engine to use the correct receive buffer size. - * This is a configurable parameter for GEM. + * Configure the receive DMA engine + * - use the correct receive buffer size + * - set the possibility to use INCR16 bursts + * (if not supported by FIFO, it will fallback to default) + * - set both rx/tx packet buffers to full memory size + * These are configurable parameters for GEM. */ static void macb_configure_dma(struct macb *bp) { @@ -1043,6 +1047,8 @@ static void macb_configure_dma(struct macb *bp) if (macb_is_gem(bp)) { dmacfg = gem_readl(bp, DMACFG) & ~GEM_BF(RXBS, -1L); dmacfg |= GEM_BF(RXBS, RX_BUFFER_SIZE / 64); + dmacfg |= GEM_BF(FBLDO, 16); + dmacfg |= GEM_BIT(TXPBMS) | GEM_BF(RXBMS, -1L); gem_writel(bp, DMACFG, dmacfg); } } diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h index 44144218dd3..570908b9357 100644 --- a/drivers/net/ethernet/cadence/macb.h +++ b/drivers/net/ethernet/cadence/macb.h @@ -171,8 +171,19 @@ #define GEM_DBW128 2 /* Bitfields in DMACFG. */ +#define GEM_FBLDO_OFFSET 0 +#define GEM_FBLDO_SIZE 5 +#define GEM_RXBMS_OFFSET 8 +#define GEM_RXBMS_SIZE 2 +#define GEM_TXPBMS_OFFSET 10 +#define GEM_TXPBMS_SIZE 1 +#define GEM_TXCOEN_OFFSET 11 +#define GEM_TXCOEN_SIZE 1 #define GEM_RXBS_OFFSET 16 #define GEM_RXBS_SIZE 8 +#define GEM_DDRP_OFFSET 24 +#define GEM_DDRP_SIZE 1 + /* Bitfields in NSR */ #define MACB_NSR_LINK_OFFSET 0 |