[BNX2]: Add support for a new tx ring.

To separate TX IRQs into a different MSIX vector, we need to
support a new tx ring.  The original tx ring will still be used
when not using MSIX.

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

2 files changed, 65 insertions, 18 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 4f2ca8a53af5..4fc9d1653cda 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -2378,7 +2378,10 @@ bnx2_get_hw_tx_cons(struct bnx2_napi *bnapi)
 {
         u16 cons;
 
-        cons = bnapi->status_blk->status_tx_quick_consumer_index0;
+        if (bnapi->int_num == 0)
+                cons = bnapi->status_blk->status_tx_quick_consumer_index0;
+        else
+                cons = bnapi->status_blk_msix->status_tx_quick_consumer_index;
 
         if (unlikely((cons & MAX_TX_DESC_CNT) == MAX_TX_DESC_CNT))
                 cons++;
@@ -2389,7 +2392,6 @@ static void
 bnx2_tx_int(struct bnx2 *bp, struct bnx2_napi *bnapi)
 {
         u16 hw_cons, sw_cons, sw_ring_cons;
-        int tx_free_bd = 0;
 
         hw_cons = bnx2_get_hw_tx_cons(bnapi);
         sw_cons = bnapi->tx_cons;
@@ -2439,8 +2441,6 @@ bnx2_tx_int(struct bnx2 *bp, struct bnx2_napi *bnapi)
 
                 sw_cons = NEXT_TX_BD(sw_cons);
 
-                tx_free_bd += last + 1;
-
                 dev_kfree_skb(skb);
 
                 hw_cons = bnx2_get_hw_tx_cons(bnapi);
@@ -4369,6 +4369,24 @@ bnx2_init_chip(struct bnx2 *bp)
                       BNX2_HC_CONFIG_COLLECT_STATS;
         }
 
+        if (bp->flags & USING_MSIX_FLAG) {
+                REG_WR(bp, BNX2_HC_MSIX_BIT_VECTOR,
+                       BNX2_HC_MSIX_BIT_VECTOR_VAL);
+
+                REG_WR(bp, BNX2_HC_SB_CONFIG_1,
+                        BNX2_HC_SB_CONFIG_1_TX_TMR_MODE |
+                        BNX2_HC_SB_CONFIG_1_ONE_SHOT);
+
+                REG_WR(bp, BNX2_HC_TX_QUICK_CONS_TRIP_1,
+                        (bp->tx_quick_cons_trip_int << 16) |
+                         bp->tx_quick_cons_trip);
+
+                REG_WR(bp, BNX2_HC_TX_TICKS_1,
+                        (bp->tx_ticks_int << 16) | bp->tx_ticks);
+
+                val |= BNX2_HC_CONFIG_SB_ADDR_INC_128B;
+        }
+
         if (bp->flags & ONE_SHOT_MSI_FLAG)
                 val |= BNX2_HC_CONFIG_ONE_SHOT;
 
@@ -4401,6 +4419,25 @@ bnx2_init_chip(struct bnx2 *bp)
 }
 
 static void
+bnx2_clear_ring_states(struct bnx2 *bp)
+{
+        struct bnx2_napi *bnapi;
+        int i;
+
+        for (i = 0; i < BNX2_MAX_MSIX_VEC; i++) {
+                bnapi = &bp->bnx2_napi[i];
+
+                bnapi->tx_cons = 0;
+                bnapi->hw_tx_cons = 0;
+                bnapi->rx_prod_bseq = 0;
+                bnapi->rx_prod = 0;
+                bnapi->rx_cons = 0;
+                bnapi->rx_pg_prod = 0;
+                bnapi->rx_pg_cons = 0;
+        }
+}
+
+static void
 bnx2_init_tx_context(struct bnx2 *bp, u32 cid)
 {
         u32 val, offset0, offset1, offset2, offset3;
@@ -4433,8 +4470,17 @@ static void
 bnx2_init_tx_ring(struct bnx2 *bp)
 {
         struct tx_bd *txbd;
-        u32 cid;
-        struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
+        u32 cid = TX_CID;
+        struct bnx2_napi *bnapi;
+
+        bp->tx_vec = 0;
+        if (bp->flags & USING_MSIX_FLAG) {
+                cid = TX_TSS_CID;
+                bp->tx_vec = BNX2_TX_VEC;
+                REG_WR(bp, BNX2_TSCH_TSS_CFG, BNX2_TX_INT_NUM |
+                       (TX_TSS_CID << 7));
+        }
+        bnapi = &bp->bnx2_napi[bp->tx_vec];
 
         bp->tx_wake_thresh = bp->tx_ring_size / 2;
 
@@ -4444,11 +4490,8 @@ bnx2_init_tx_ring(struct bnx2 *bp)
         txbd->tx_bd_haddr_lo = (u64) bp->tx_desc_mapping & 0xffffffff;
 
         bp->tx_prod = 0;
-        bnapi->tx_cons = 0;
-        bnapi->hw_tx_cons = 0;
         bp->tx_prod_bseq = 0;
 
-        cid = TX_CID;
         bp->tx_bidx_addr = MB_GET_CID_ADDR(cid) + BNX2_L2CTX_TX_HOST_BIDX;
         bp->tx_bseq_addr = MB_GET_CID_ADDR(cid) + BNX2_L2CTX_TX_HOST_BSEQ;
 
@@ -4487,12 +4530,6 @@ bnx2_init_rx_ring(struct bnx2 *bp)
         u32 val, rx_cid_addr = GET_CID_ADDR(RX_CID);
         struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
 
-        bnapi->rx_prod = 0;
-        bnapi->rx_cons = 0;
-        bnapi->rx_prod_bseq = 0;
-        bnapi->rx_pg_prod = 0;
-        bnapi->rx_pg_cons = 0;
-
         bnx2_init_rxbd_rings(bp->rx_desc_ring, bp->rx_desc_mapping,
                              bp->rx_buf_use_size, bp->rx_max_ring);
 
@@ -4694,6 +4731,7 @@ bnx2_reset_nic(struct bnx2 *bp, u32 reset_code)
         if ((rc = bnx2_init_chip(bp)) != 0)
                 return rc;
 
+        bnx2_clear_ring_states(bp);
         bnx2_init_tx_ring(bp);
         bnx2_init_rx_ring(bp);
         return 0;
@@ -4965,7 +5003,11 @@ bnx2_run_loopback(struct bnx2 *bp, int loopback_mode)
         struct sw_bd *rx_buf;
         struct l2_fhdr *rx_hdr;
         int ret = -ENODEV;
-        struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
+        struct bnx2_napi *bnapi = &bp->bnx2_napi[0], *tx_napi;
+
+        tx_napi = bnapi;
+        if (bp->flags & USING_MSIX_FLAG)
+                tx_napi = &bp->bnx2_napi[BNX2_TX_VEC];
 
         if (loopback_mode == BNX2_MAC_LOOPBACK) {
                 bp->loopback = MAC_LOOPBACK;
@@ -5030,7 +5072,7 @@ bnx2_run_loopback(struct bnx2 *bp, int loopback_mode)
         pci_unmap_single(bp->pdev, map, pkt_size, PCI_DMA_TODEVICE);
         dev_kfree_skb(skb);
 
-        if (bnx2_get_hw_tx_cons(bnapi) != bp->tx_prod)
+        if (bnx2_get_hw_tx_cons(tx_napi) != bp->tx_prod)
                 goto loopback_test_done;
 
         rx_idx = bnx2_get_hw_rx_cons(bnapi);
@@ -5324,7 +5366,7 @@ bnx2_request_irq(struct bnx2 *bp)
 
         for (i = 0; i < bp->irq_nvecs; i++) {
                 irq = &bp->irq_tbl[i];
-                rc = request_irq(irq->vector, irq->handler, flags, dev->name,
+                rc = request_irq(irq->vector, irq->handler, flags, irq->name,
                                  dev);
                 if (rc)
                         break;
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index d71ceb6c176f..68fb5904f75c 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -6529,6 +6529,9 @@ struct flash_spec {
 
 #define BNX2_MAX_MSIX_HW_VEC    9
 #define BNX2_MAX_MSIX_VEC       1
+#define BNX2_BASE_VEC           0
+#define BNX2_TX_VEC             1
+#define BNX2_TX_INT_NUM (BNX2_TX_VEC << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT)
 
 struct bnx2_irq {
         irq_handler_t   handler;
@@ -6541,6 +6544,7 @@ struct bnx2_napi {
         struct napi_struct      napi            ____cacheline_aligned;
         struct bnx2             *bp;
         struct status_block     *status_blk;
+        struct status_block_msix        *status_blk_msix;
         u32                     last_status_idx;
         u32                     int_num;
 
@@ -6583,6 +6587,7 @@ struct bnx2 {
 
         u32             tx_prod_bseq __attribute__((aligned(L1_CACHE_BYTES)));
         u16             tx_prod;
+        u8              tx_vec;
         u32             tx_bidx_addr;
         u32             tx_bseq_addr;