diff options
Diffstat (limited to 'drivers/net/wireless/ath9k/ath9k.h')
| -rw-r--r-- | drivers/net/wireless/ath9k/ath9k.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath9k/ath9k.h b/drivers/net/wireless/ath9k/ath9k.h index accace5f7ef..a6063dea0fa 100644 --- a/drivers/net/wireless/ath9k/ath9k.h +++ b/drivers/net/wireless/ath9k/ath9k.h @@ -138,6 +138,19 @@ struct ath_desc { #define ATH9K_TXDESC_NOACK 0x0002 #define ATH9K_TXDESC_RTSENA 0x0004 #define ATH9K_TXDESC_CTSENA 0x0008 +/* ATH9K_TXDESC_INTREQ forces a tx interrupt to be generated for + * the descriptor its marked on. We take a tx interrupt to reap + * descriptors when the h/w hits an EOL condition or + * when the descriptor is specifically marked to generate + * an interrupt with this flag. Descriptors should be + * marked periodically to insure timely replenishing of the + * supply needed for sending frames. Defering interrupts + * reduces system load and potentially allows more concurrent + * work to be done but if done to aggressively can cause + * senders to backup. When the hardware queue is left too + * large rate control information may also be too out of + * date. An Alternative for this is TX interrupt mitigation + * but this needs more testing. */ #define ATH9K_TXDESC_INTREQ 0x0010 #define ATH9K_TXDESC_VEOL 0x0020 #define ATH9K_TXDESC_EXT_ONLY 0x0040 |