[BNX2]: Support multiple MSIX IRQs.

Change bnx2_napi struct into an array and add code to manage multiple
IRQs.  MSIX hardware structures and new registers are also added.

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

1 files changed, 125 insertions, 36 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index ecfaad102f70..4f2ca8a53af5 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -399,44 +399,65 @@ bnx2_write_phy(struct bnx2 *bp, u32 reg, u32 val)
 static void
 bnx2_disable_int(struct bnx2 *bp)
 {
-        REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,
-               BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
+        int i;
+        struct bnx2_napi *bnapi;
+
+        for (i = 0; i < bp->irq_nvecs; i++) {
+                bnapi = &bp->bnx2_napi[i];
+                REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD, bnapi->int_num |
+                       BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
+        }
         REG_RD(bp, BNX2_PCICFG_INT_ACK_CMD);
 }
 
 static void
 bnx2_enable_int(struct bnx2 *bp)
 {
-        struct bnx2_napi *bnapi = &bp->bnx2_napi;
+        int i;
+        struct bnx2_napi *bnapi;
 
-        REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,
-               BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |
-               BNX2_PCICFG_INT_ACK_CMD_MASK_INT | bnapi->last_status_idx);
+        for (i = 0; i < bp->irq_nvecs; i++) {
+                bnapi = &bp->bnx2_napi[i];
 
-        REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,
-               BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | bnapi->last_status_idx);
+                REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD, bnapi->int_num |
+                       BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |
+                       BNX2_PCICFG_INT_ACK_CMD_MASK_INT |
+                       bnapi->last_status_idx);
 
+                REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD, bnapi->int_num |
+                       BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |
+                       bnapi->last_status_idx);
+        }
         REG_WR(bp, BNX2_HC_COMMAND, bp->hc_cmd | BNX2_HC_COMMAND_COAL_NOW);
 }
 
 static void
 bnx2_disable_int_sync(struct bnx2 *bp)
 {
+        int i;
+
         atomic_inc(&bp->intr_sem);
         bnx2_disable_int(bp);
-        synchronize_irq(bp->pdev->irq);
+        for (i = 0; i < bp->irq_nvecs; i++)
+                synchronize_irq(bp->irq_tbl[i].vector);
 }
 
 static void
 bnx2_napi_disable(struct bnx2 *bp)
 {
-        napi_disable(&bp->bnx2_napi.napi);
+        int i;
+
+        for (i = 0; i < bp->irq_nvecs; i++)
+                napi_disable(&bp->bnx2_napi[i].napi);
 }
 
 static void
 bnx2_napi_enable(struct bnx2 *bp)
 {
-        napi_enable(&bp->bnx2_napi.napi);
+        int i;
+
+        for (i = 0; i < bp->irq_nvecs; i++)
+                napi_enable(&bp->bnx2_napi[i].napi);
 }
 
 static void
@@ -559,6 +580,9 @@ bnx2_alloc_mem(struct bnx2 *bp)
 
         /* Combine status and statistics blocks into one allocation. */
         status_blk_size = L1_CACHE_ALIGN(sizeof(struct status_block));
+        if (bp->flags & MSIX_CAP_FLAG)
+                status_blk_size = L1_CACHE_ALIGN(BNX2_MAX_MSIX_HW_VEC *
+                                                 BNX2_SBLK_MSIX_ALIGN_SIZE);
         bp->status_stats_size = status_blk_size +
                                 sizeof(struct statistics_block);
 
@@ -569,7 +593,17 @@ bnx2_alloc_mem(struct bnx2 *bp)
 
         memset(bp->status_blk, 0, bp->status_stats_size);
 
-        bp->bnx2_napi.status_blk = bp->status_blk;
+        bp->bnx2_napi[0].status_blk = bp->status_blk;
+        if (bp->flags & MSIX_CAP_FLAG) {
+                for (i = 1; i < BNX2_MAX_MSIX_VEC; i++) {
+                        struct bnx2_napi *bnapi = &bp->bnx2_napi[i];
+
+                        bnapi->status_blk = (void *)
+                                ((unsigned long) bp->status_blk +
+                                 BNX2_SBLK_MSIX_ALIGN_SIZE * i);
+                        bnapi->int_num = i << 24;
+                }
+        }
 
         bp->stats_blk = (void *) ((unsigned long) bp->status_blk +
                                   status_blk_size);
@@ -2767,7 +2801,7 @@ bnx2_msi(int irq, void *dev_instance)
 {
         struct net_device *dev = dev_instance;
         struct bnx2 *bp = netdev_priv(dev);
-        struct bnx2_napi *bnapi = &bp->bnx2_napi;
+        struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
 
         prefetch(bnapi->status_blk);
         REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,
@@ -2788,7 +2822,7 @@ bnx2_msi_1shot(int irq, void *dev_instance)
 {
         struct net_device *dev = dev_instance;
         struct bnx2 *bp = netdev_priv(dev);
-        struct bnx2_napi *bnapi = &bp->bnx2_napi;
+        struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
 
         prefetch(bnapi->status_blk);
 
@@ -2806,7 +2840,7 @@ bnx2_interrupt(int irq, void *dev_instance)
 {
         struct net_device *dev = dev_instance;
         struct bnx2 *bp = netdev_priv(dev);
-        struct bnx2_napi *bnapi = &bp->bnx2_napi;
+        struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
         struct status_block *sblk = bnapi->status_blk;
 
         /* When using INTx, it is possible for the interrupt to arrive
@@ -2911,7 +2945,7 @@ static int bnx2_poll(struct napi_struct *napi, int budget)
                 rmb();
                 if (likely(!bnx2_has_work(bnapi))) {
                         netif_rx_complete(bp->dev, napi);
-                        if (likely(bp->flags & USING_MSI_FLAG)) {
+                        if (likely(bp->flags & USING_MSI_OR_MSIX_FLAG)) {
                                 REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD,
                                        BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID |
                                        bnapi->last_status_idx);
@@ -4072,6 +4106,15 @@ bnx2_init_remote_phy(struct bnx2 *bp)
         }
 }
 
+static void
+bnx2_setup_msix_tbl(struct bnx2 *bp)
+{
+        REG_WR(bp, BNX2_PCI_GRC_WINDOW_ADDR, BNX2_PCI_GRC_WINDOW_ADDR_SEP_WIN);
+
+        REG_WR(bp, BNX2_PCI_GRC_WINDOW2_ADDR, BNX2_MSIX_TABLE_ADDR);
+        REG_WR(bp, BNX2_PCI_GRC_WINDOW3_ADDR, BNX2_MSIX_PBA_ADDR);
+}
+
 static int
 bnx2_reset_chip(struct bnx2 *bp, u32 reset_code)
 {
@@ -4171,6 +4214,9 @@ bnx2_reset_chip(struct bnx2 *bp, u32 reset_code)
                 rc = bnx2_alloc_bad_rbuf(bp);
         }
 
+        if (bp->flags & USING_MSIX_FLAG)
+                bnx2_setup_msix_tbl(bp);
+
         return rc;
 }
 
@@ -4178,7 +4224,7 @@ static int
 bnx2_init_chip(struct bnx2 *bp)
 {
         u32 val;
-        int rc;
+        int rc, i;
 
         /* Make sure the interrupt is not active. */
         REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD, BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
@@ -4274,7 +4320,9 @@ bnx2_init_chip(struct bnx2 *bp)
                 val |= BNX2_EMAC_RX_MTU_SIZE_JUMBO_ENA;
         REG_WR(bp, BNX2_EMAC_RX_MTU_SIZE, val);
 
-        bp->bnx2_napi.last_status_idx = 0;
+        for (i = 0; i < BNX2_MAX_MSIX_VEC; i++)
+                bp->bnx2_napi[i].last_status_idx = 0;
+
         bp->rx_mode = BNX2_EMAC_RX_MODE_SORT_MODE;
 
         /* Set up how to generate a link change interrupt. */
@@ -4386,7 +4434,7 @@ bnx2_init_tx_ring(struct bnx2 *bp)
 {
         struct tx_bd *txbd;
         u32 cid;
-        struct bnx2_napi *bnapi = &bp->bnx2_napi;
+        struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
 
         bp->tx_wake_thresh = bp->tx_ring_size / 2;
 
@@ -4437,7 +4485,7 @@ bnx2_init_rx_ring(struct bnx2 *bp)
         int i;
         u16 prod, ring_prod;
         u32 val, rx_cid_addr = GET_CID_ADDR(RX_CID);
-        struct bnx2_napi *bnapi = &bp->bnx2_napi;
+        struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
 
         bnapi->rx_prod = 0;
         bnapi->rx_cons = 0;
@@ -4917,7 +4965,7 @@ 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;
+        struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
 
         if (loopback_mode == BNX2_MAC_LOOPBACK) {
                 bp->loopback = MAC_LOOPBACK;
@@ -5266,14 +5314,22 @@ bnx2_request_irq(struct bnx2 *bp)
 {
         struct net_device *dev = bp->dev;
         unsigned long flags;
-        struct bnx2_irq *irq = &bp->irq_tbl[0];
-        int rc;
+        struct bnx2_irq *irq;
+        int rc = 0, i;
 
-        if (bp->flags & USING_MSI_FLAG)
+        if (bp->flags & USING_MSI_OR_MSIX_FLAG)
                 flags = 0;
         else
                 flags = IRQF_SHARED;
-        rc = request_irq(irq->vector, irq->handler, flags, dev->name, dev);
+
+        for (i = 0; i < bp->irq_nvecs; i++) {
+                irq = &bp->irq_tbl[i];
+                rc = request_irq(irq->vector, irq->handler, flags, dev->name,
+                                 dev);
+                if (rc)
+                        break;
+                irq->requested = 1;
+        }
         return rc;
 }
 
@@ -5281,12 +5337,30 @@ static void
 bnx2_free_irq(struct bnx2 *bp)
 {
         struct net_device *dev = bp->dev;
+        struct bnx2_irq *irq;
+        int i;
 
-        free_irq(bp->irq_tbl[0].vector, dev);
-        if (bp->flags & USING_MSI_FLAG) {
-                pci_disable_msi(bp->pdev);
-                bp->flags &= ~(USING_MSI_FLAG | ONE_SHOT_MSI_FLAG);
+        for (i = 0; i < bp->irq_nvecs; i++) {
+                irq = &bp->irq_tbl[i];
+                if (irq->requested)
+                        free_irq(irq->vector, dev);
+                irq->requested = 0;
         }
+        if (bp->flags & USING_MSI_FLAG)
+                pci_disable_msi(bp->pdev);
+        else if (bp->flags & USING_MSIX_FLAG)
+                pci_disable_msix(bp->pdev);
+
+        bp->flags &= ~(USING_MSI_OR_MSIX_FLAG | ONE_SHOT_MSI_FLAG);
+}
+
+static void
+bnx2_enable_msix(struct bnx2 *bp)
+{
+        bnx2_setup_msix_tbl(bp);
+        REG_WR(bp, BNX2_PCI_MSIX_CONTROL, BNX2_MAX_MSIX_HW_VEC - 1);
+        REG_WR(bp, BNX2_PCI_MSIX_TBL_OFF_BIR, BNX2_PCI_GRC_WINDOW2_BASE);
+        REG_WR(bp, BNX2_PCI_MSIX_PBA_OFF_BIT, BNX2_PCI_GRC_WINDOW3_BASE);
 }
 
 static void
@@ -5294,8 +5368,14 @@ bnx2_setup_int_mode(struct bnx2 *bp, int dis_msi)
 {
         bp->irq_tbl[0].handler = bnx2_interrupt;
         strcpy(bp->irq_tbl[0].name, bp->dev->name);
+        bp->irq_nvecs = 1;
+        bp->irq_tbl[0].vector = bp->pdev->irq;
+
+        if ((bp->flags & MSIX_CAP_FLAG) && !dis_msi)
+                bnx2_enable_msix(bp);
 
-        if ((bp->flags & MSI_CAP_FLAG) && !dis_msi) {
+        if ((bp->flags & MSI_CAP_FLAG) && !dis_msi &&
+            !(bp->flags & USING_MSIX_FLAG)) {
                 if (pci_enable_msi(bp->pdev) == 0) {
                         bp->flags |= USING_MSI_FLAG;
                         if (CHIP_NUM(bp) == CHIP_NUM_5709) {
@@ -5303,10 +5383,10 @@ bnx2_setup_int_mode(struct bnx2 *bp, int dis_msi)
                                 bp->irq_tbl[0].handler = bnx2_msi_1shot;
                         } else
                                 bp->irq_tbl[0].handler = bnx2_msi;
+
+                        bp->irq_tbl[0].vector = bp->pdev->irq;
                 }
         }
-
-        bp->irq_tbl[0].vector = bp->pdev->irq;
 }
 
 /* Called with rtnl_lock */
@@ -5448,7 +5528,7 @@ bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev)
         u32 len, vlan_tag_flags, last_frag, mss;
         u16 prod, ring_prod;
         int i;
-        struct bnx2_napi *bnapi = &bp->bnx2_napi;
+        struct bnx2_napi *bnapi = &bp->bnx2_napi[0];
 
         if (unlikely(bnx2_tx_avail(bp, bnapi) <
             (skb_shinfo(skb)->nr_frags + 1))) {
@@ -6848,6 +6928,11 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
                 }
         }
 
+        if (CHIP_NUM(bp) == CHIP_NUM_5709 && CHIP_REV(bp) != CHIP_REV_Ax) {
+                if (pci_find_capability(pdev, PCI_CAP_ID_MSIX))
+                        bp->flags |= MSIX_CAP_FLAG;
+        }
+
         if (CHIP_ID(bp) != CHIP_ID_5706_A0 && CHIP_ID(bp) != CHIP_ID_5706_A1) {
                 if (pci_find_capability(pdev, PCI_CAP_ID_MSI))
                         bp->flags |= MSI_CAP_FLAG;
@@ -7118,10 +7203,14 @@ bnx2_bus_string(struct bnx2 *bp, char *str)
 static int __devinit
 bnx2_init_napi(struct bnx2 *bp)
 {
-        struct bnx2_napi *bnapi = &bp->bnx2_napi;
+        int i;
+        struct bnx2_napi *bnapi;
 
-        bnapi->bp = bp;
-        netif_napi_add(bp->dev, &bnapi->napi, bnx2_poll, 64);
+        for (i = 0; i < BNX2_MAX_MSIX_VEC; i++) {
+                bnapi = &bp->bnx2_napi[i];
+                bnapi->bp = bp;
+        }
+        netif_napi_add(bp->dev, &bp->bnx2_napi[0].napi, bnx2_poll, 64);
 }
 
 static int __devinit