tg3: Add per-int coalesce now member

Each interrupt vector has its own bit in the host coalescing register to
force that vector's status block to be updated and generate an
interrupt.  This patch adds a member to the per-interrupt structure
that records which bit belongs to that vector.
Signed-off-by: NMatt Carlson <mcarlson@broadcom.com>
Reviewed-by: NBenjamin Li <benli@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/tg3.c

@@ -631,7 +631,7 @@ static void tg3_enable_ints(struct tg3 *tp)
 	if (tp->tg3_flags2 & TG3_FLG2_1SHOT_MSI)
 		tw32_mailbox_f(tnapi->int_mbox, tnapi->last_tag << 24);
 
-	coal_now = HOSTCC_MODE_NOW;
+	coal_now = tnapi->coal_now;
 
 	/* Force an initial interrupt */
 	if (!(tp->tg3_flags & TG3_FLAG_TAGGED_STATUS) &&
@@ -682,7 +682,7 @@ static void tg3_int_reenable(struct tg3_napi *tnapi)
 	if (!(tp->tg3_flags & TG3_FLAG_TAGGED_STATUS) &&
 	    tg3_has_work(tnapi))
 		tw32(HOSTCC_MODE, tp->coalesce_mode |
-		     (HOSTCC_MODE_ENABLE | HOSTCC_MODE_NOW));
+		     HOSTCC_MODE_ENABLE | tnapi->coal_now);
 }
 
 static inline void tg3_netif_stop(struct tg3 *tp)
@@ -7622,7 +7622,7 @@ static void tg3_timer(unsigned long __opaque)
 			     tp->grc_local_ctrl | GRC_LCLCTRL_SETINT);
 		} else {
 			tw32(HOSTCC_MODE, tp->coalesce_mode |
-			     (HOSTCC_MODE_ENABLE | HOSTCC_MODE_NOW));
+			     HOSTCC_MODE_ENABLE | HOSTCC_MODE_NOW);
 		}
 
 		if (!(tr32(WDMAC_MODE) & WDMAC_MODE_ENABLE)) {
@@ -7765,7 +7765,7 @@ static int tg3_test_interrupt(struct tg3 *tp)
 	tg3_enable_ints(tp);
 
 	tw32_f(HOSTCC_MODE, tp->coalesce_mode | HOSTCC_MODE_ENABLE |
-	       HOSTCC_MODE_NOW);
+	       tnapi->coal_now);
 
 	for (i = 0; i < 5; i++) {
 		u32 int_mbox, misc_host_ctrl;
@@ -9840,7 +9840,7 @@ static int tg3_test_memory(struct tg3 *tp)
 static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
 {
 	u32 mac_mode, rx_start_idx, rx_idx, tx_idx, opaque_key;
-	u32 desc_idx;
+	u32 desc_idx, coal_now;
 	struct sk_buff *skb, *rx_skb;
 	u8 *tx_data;
 	dma_addr_t map;
@@ -9851,6 +9851,7 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
 
 	tnapi = &tp->napi[0];
 	rnapi = &tp->napi[0];
+	coal_now = tnapi->coal_now | rnapi->coal_now;
 
 	if (loopback_mode == TG3_MAC_LOOPBACK) {
 		/* HW errata - mac loopback fails in some cases on 5780.
@@ -9929,7 +9930,7 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
 	map = pci_map_single(tp->pdev, skb->data, tx_len, PCI_DMA_TODEVICE);
 
 	tw32_f(HOSTCC_MODE, tp->coalesce_mode | HOSTCC_MODE_ENABLE |
-	     HOSTCC_MODE_NOW);
+	       rnapi->coal_now);
 
 	udelay(10);
 
@@ -9950,7 +9951,7 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
 	/* 250 usec to allow enough time on some 10/100 Mbps devices.  */
 	for (i = 0; i < 25; i++) {
 		tw32_f(HOSTCC_MODE, tp->coalesce_mode | HOSTCC_MODE_ENABLE |
-		       HOSTCC_MODE_NOW);
+		       coal_now);
 
 		udelay(10);
 
@@ -13428,6 +13429,7 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
 	tp->napi[0].int_mbox = MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW;
 	tp->napi[0].consmbox = MAILBOX_RCVRET_CON_IDX_0 + TG3_64BIT_REG_LOW;
 	tp->napi[0].prodmbox = MAILBOX_SNDHOST_PROD_IDX_0 + TG3_64BIT_REG_LOW;
+	tp->napi[0].coal_now = HOSTCC_MODE_NOW;
 	tp->napi[0].tx_pending = TG3_DEF_TX_RING_PENDING;
 	netif_napi_add(dev, &tp->napi[0].napi, tg3_poll, 64);
 	dev->ethtool_ops = &tg3_ethtool_ops;

drivers/net/tg3.h

@@ -1031,6 +1031,7 @@
 #define  HOSTCC_MODE_CLRTICK_TXBD	 0x00000400
 #define  HOSTCC_MODE_NOINT_ON_NOW	 0x00000800
 #define  HOSTCC_MODE_NOINT_ON_FORCE	 0x00001000
+#define  HOSTCC_MODE_COAL_VEC1_NOW	 0x00002000
 #define HOSTCC_STATUS			0x00003c04
 #define  HOSTCC_STATUS_ERROR_ATTN	 0x00000004
 #define HOSTCC_RXCOL_TICKS		0x00003c08
@@ -2497,6 +2498,7 @@ struct tg3_napi {
 	u32				last_tag;
 	u32				last_irq_tag;
 	u32				int_mbox;
+	u32				coal_now;
 	u32				tx_prod;
 	u32				tx_cons;
 	u32				tx_pending;