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sfc: Make the dmaq size a run-time setting (rather than compile-time)

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- Allow the ring size to be specified in non
   power-of-two sizes (for instance to limit
   the amount of receive buffers).
 - Automatically size the event queue.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steve Hodgson
2010-09-10 06:42:22 +00:00
committed by David S. Miller
parent 8313aca38b
commit ecc910f520
7 changed files with 109 additions and 76 deletions
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13
drivers/net/sfc/efx.h
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@@ -37,8 +37,6 @@ efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
extern void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
extern void efx_stop_queue(struct efx_channel *channel);
extern void efx_wake_queue(struct efx_channel *channel);
#define EFX_TXQ_SIZE 1024
#define EFX_TXQ_MASK (EFX_TXQ_SIZE - 1)
/* RX */
extern int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
@@ -53,13 +51,16 @@ extern void __efx_rx_packet(struct efx_channel *channel,
extern void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
unsigned int len, bool checksummed, bool discard);
extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
#define EFX_RXQ_SIZE 1024
#define EFX_RXQ_MASK (EFX_RXQ_SIZE - 1)
#define EFX_MAX_DMAQ_SIZE 4096UL
#define EFX_DEFAULT_DMAQ_SIZE 1024UL
#define EFX_MIN_DMAQ_SIZE 512UL
#define EFX_MAX_EVQ_SIZE 16384UL
#define EFX_MIN_EVQ_SIZE 512UL
/* Channels */
extern void efx_process_channel_now(struct efx_channel *channel);
#define EFX_EVQ_SIZE 4096
#define EFX_EVQ_MASK (EFX_EVQ_SIZE - 1)
/* Ports */
extern int efx_reconfigure_port(struct efx_nic *efx);