[PATCH net-next 08/10] bnxt_en: Refactor tx completion path.

[Michael Chan]

XDP_TX requires a different function to handle completion.  Add a
function pointer to handle tx completion logic.  Regular TX rings
will be assigned the current bnxt_tx_int() for the ->tx_int()
function pointer.

Also, add a struct page pointer as a union with the current skb pointer
to the struct bnxt_sw_tx_bd.  XDP TX rings will use the struct page
pointer.

Signed-off-by: Michael Chan <michael.c...@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c |  5 ++++-
 drivers/net/ethernet/broadcom/bnxt/bnxt.h | 10 +++++++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c 
b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 295c91f..d9098ee 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1763,7 +1763,7 @@ static int bnxt_poll_work(struct bnxt *bp, struct 
bnxt_napi *bnapi, int budget)
        BNXT_CP_DB(cpr->cp_doorbell, cpr->cp_raw_cons);
 
        if (tx_pkts)
-               bnxt_tx_int(bp, bnapi, tx_pkts);
+               bnapi->tx_int(bp, bnapi, tx_pkts);
 
        if (event & BNXT_RX_EVENT) {
                struct bnxt_rx_ring_info *rxr = bnapi->rx_ring;
@@ -3038,6 +3038,9 @@ static int bnxt_alloc_mem(struct bnxt *bp, bool 
irq_re_init)
                        bp->tx_ring[i].bnapi = bp->bnapi[j];
                        bp->bnapi[j]->tx_ring = &bp->tx_ring[i];
                        bp->tx_ring_map[i] = bp->tx_nr_rings_xdp + i;
+                       if (i < bp->tx_nr_rings_xdp)
+                               bp->bnapi[j]->flags |= BNXT_NAPI_FLAG_XDP;
+                       bp->bnapi[j]->tx_int = bnxt_tx_int;
                }
 
                rc = bnxt_alloc_stats(bp);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h 
b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 9bd1a26..f5d5971 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -515,7 +515,10 @@ struct rx_tpa_end_cmp_ext {
 #define BNXT_AGG_EVENT 2
 
 struct bnxt_sw_tx_bd {
-       struct sk_buff          *skb;
+       union {
+               struct sk_buff          *skb;
+               struct page             *page;
+       };
        DEFINE_DMA_UNMAP_ADDR(mapping);
        u8                      is_gso;
        u8                      is_push;
@@ -663,6 +666,11 @@ struct bnxt_napi {
        struct bnxt_rx_ring_info        *rx_ring;
        struct bnxt_tx_ring_info        *tx_ring;
 
+       void                    (*tx_int)(struct bnxt *, struct bnxt_napi *,
+                                         int);
+       u32                     flags;
+#define BNXT_NAPI_FLAG_XDP     0x1
+
        bool                    in_reset;
 };
 
-- 
1.8.3.1