[TG3]: Add new one-shot MSI handler

Support one-shot MSI on 5787.

This one-shot MSI idea is credited to David Miller. In this mode, MSI
disables itself automatically after it is generated, saving the driver
a register access to disable it for NAPI.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index ba3466c8a96d..6b05d5786cd7 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2209,6 +2209,7 @@ struct tg3 {
 #define TG3_FLG2_5780_CLASS             0x04000000
 #define TG3_FLG2_HW_TSO_2               0x08000000
 #define TG3_FLG2_HW_TSO                 (TG3_FLG2_HW_TSO_1 | TG3_FLG2_HW_TSO_2)
+#define TG3_FLG2_1SHOT_MSI              0x10000000
 
         u32                             split_mode_max_reqs;
 #define SPLIT_MODE_5704_MAX_REQ         3