diff options
| author | Jon Mason <jon.mason@exar.com> | 2011-01-18 15:02:21 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-19 23:18:14 -0800 |
| commit | 16fded7da2cefc619ece0d44f8df76b533c43fd2 (patch) | |
| tree | ec9ca42bf2e754e378dbd701def152c7dc5cf194 /drivers/net/vxge/vxge-main.h | |
| parent | 1d15f81cda496f1c1d59af7458ea0bcdeeb726f3 (diff) | |
vxge: MSIX one shot mode
To reduce the possibility of losing an interrupt in the handler due to a
race between an interrupt processing and disable/enable of interrupts,
enable MSIX one shot.
Also, add support for adaptive interrupt coalesing
Signed-off-by: Jon Mason <jon.mason@exar.com>
Signed-off-by: Masroor Vettuparambil <masroor.vettuparambil@exar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxge/vxge-main.h')
| -rw-r--r-- | drivers/net/vxge/vxge-main.h | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/net/vxge/vxge-main.h b/drivers/net/vxge/vxge-main.h index 5746fedc356..40474f0da57 100644 --- a/drivers/net/vxge/vxge-main.h +++ b/drivers/net/vxge/vxge-main.h @@ -59,11 +59,13 @@ #define VXGE_TTI_LTIMER_VAL 1000 #define VXGE_T1A_TTI_LTIMER_VAL 80 #define VXGE_TTI_RTIMER_VAL 0 +#define VXGE_TTI_RTIMER_ADAPT_VAL 10 #define VXGE_T1A_TTI_RTIMER_VAL 400 #define VXGE_RTI_BTIMER_VAL 250 #define VXGE_RTI_LTIMER_VAL 100 #define VXGE_RTI_RTIMER_VAL 0 -#define VXGE_FIFO_INDICATE_MAX_PKTS VXGE_DEF_FIFO_LENGTH +#define VXGE_RTI_RTIMER_ADAPT_VAL 15 +#define VXGE_FIFO_INDICATE_MAX_PKTS VXGE_DEF_FIFO_LENGTH #define VXGE_ISR_POLLING_CNT 8 #define VXGE_MAX_CONFIG_DEV 0xFF #define VXGE_EXEC_MODE_DISABLE 0 @@ -107,6 +109,14 @@ #define RTI_T1A_RX_UFC_C 50 #define RTI_T1A_RX_UFC_D 60 +/* + * The interrupt rate is maintained at 3k per second with the moderation + * parameters for most traffic but not all. This is the maximum interrupt + * count allowed per function with INTA or per vector in the case of + * MSI-X in a 10 millisecond time period. Enabled only for Titan 1A. + */ +#define VXGE_T1A_MAX_INTERRUPT_COUNT 100 +#define VXGE_T1A_MAX_TX_INTERRUPT_COUNT 200 /* Milli secs timer period */ #define VXGE_TIMER_DELAY 10000 @@ -247,6 +257,11 @@ struct vxge_fifo { int tx_steering_type; int indicate_max_pkts; + /* Adaptive interrupt moderation parameters used in T1A */ + unsigned long interrupt_count; + unsigned long jiffies; + + u32 tx_vector_no; /* Tx stats */ struct vxge_fifo_stats stats; } ____cacheline_aligned; @@ -271,6 +286,10 @@ struct vxge_ring { */ int driver_id; + /* Adaptive interrupt moderation parameters used in T1A */ + unsigned long interrupt_count; + unsigned long jiffies; + /* copy of the flag indicating whether rx_csum is to be used */ u32 rx_csum:1, rx_hwts:1; @@ -286,7 +305,7 @@ struct vxge_ring { int vlan_tag_strip; struct vlan_group *vlgrp; - int rx_vector_no; + u32 rx_vector_no; enum vxge_hw_status last_status; /* Rx stats */ |