bnxt_en: Add new NAPI poll function for 57500 chips.

Add a new poll function that polls for NQ events.  If the NQ event is
a CQ notification, we locate the CP ring from the cq_handle and call
__bnxt_poll_work() to handle RX/TX events on the CP ring.

Add a new has_more_work field in struct bnxt_cp_ring_info to indicate
budget has been reached.  __bnxt_poll_cqs_done() is called to update or
ARM the CP rings if budget has not been reached or not.  If budget
has been reached, the next bnxt_poll_p5() call will continue to poll
from the CQ rings directly.  Otherwise, the NQ will be ARMed for the
next IRQ.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 48cb2d54c3bc..0fe57e36912b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -537,6 +537,9 @@ struct nqe_cn {
 	(!!((agg)->rx_agg_cmp_v & cpu_to_le32(RX_AGG_CMP_V)) ==	\
 	 !((raw_cons) & bp->cp_bit))
 
+#define NQ_CMP_VALID(nqcmp, raw_cons)				\
+	(!!((nqcmp)->v & cpu_to_le32(NQ_CN_V)) == !((raw_cons) & bp->cp_bit))
+
 #define TX_CMP_TYPE(txcmp)					\
 	(le32_to_cpu((txcmp)->tx_cmp_flags_type) & CMP_TYPE)
 
@@ -793,6 +796,7 @@ struct bnxt_cp_ring_info {
 	struct bnxt_db_info	cp_db;
 
 	u8			had_work_done:1;
+	u8			has_more_work:1;
 
 	struct bnxt_coal	rx_ring_coal;
 	u64			rx_packets;