1 files changed, 108 insertions, 67 deletions

diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index 0704bcab178a..a3793190437f 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -76,6 +76,8 @@
 #define FEC_QUIRK_USE_GASKET		(1 << 2)
 /* Controller has GBIT support */
 #define FEC_QUIRK_HAS_GBIT		(1 << 3)
+/* Controller has extend desc buffer */
+#define FEC_QUIRK_HAS_BUFDESC_EX	(1 << 4)
 
 static struct platform_device_id fec_devtype[] = {
 	{
@@ -93,7 +95,8 @@ static struct platform_device_id fec_devtype[] = {
 		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME,
 	}, {
 		.name = "imx6q-fec",
-		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT,
+		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
+				FEC_QUIRK_HAS_BUFDESC_EX,
 	}, {
 		/* sentinel */
 	}
@@ -140,7 +143,7 @@ MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
 #endif
 #endif /* CONFIG_M5272 */
 
-#if (((RX_RING_SIZE + TX_RING_SIZE) * 8) > PAGE_SIZE)
+#if (((RX_RING_SIZE + TX_RING_SIZE) * 32) > PAGE_SIZE)
 #error "FEC: descriptor ring size constants too large"
 #endif
 
@@ -192,6 +195,24 @@ MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
 
 static int mii_cnt;
 
+static struct bufdesc *fec_enet_get_nextdesc(struct bufdesc *bdp, int is_ex)
+{
+	struct bufdesc_ex *ex = (struct bufdesc_ex *)bdp;
+	if (is_ex)
+		return (struct bufdesc *)(ex + 1);
+	else
+		return bdp + 1;
+}
+
+static struct bufdesc *fec_enet_get_prevdesc(struct bufdesc *bdp, int is_ex)
+{
+	struct bufdesc_ex *ex = (struct bufdesc_ex *)bdp;
+	if (is_ex)
+		return (struct bufdesc *)(ex - 1);
+	else
+		return bdp - 1;
+}
+
 static void *swap_buffer(void *bufaddr, int len)
 {
 	int i;
@@ -248,7 +269,11 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 	 */
 	if (((unsigned long) bufaddr) & FEC_ALIGNMENT) {
 		unsigned int index;
-		index = bdp - fep->tx_bd_base;
+		if (fep->bufdesc_ex)
+			index = (struct bufdesc_ex *)bdp -
+				(struct bufdesc_ex *)fep->tx_bd_base;
+		else
+			index = bdp - fep->tx_bd_base;
 		memcpy(fep->tx_bounce[index], skb->data, skb->len);
 		bufaddr = fep->tx_bounce[index];
 	}
@@ -280,17 +305,19 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 			| BD_ENET_TX_LAST | BD_ENET_TX_TC);
 	bdp->cbd_sc = status;
 
-#ifdef CONFIG_FEC_PTP
-	bdp->cbd_bdu = 0;
-	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
+	if (fep->bufdesc_ex) {
+
+		struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
+		ebdp->cbd_bdu = 0;
+		if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
 			fep->hwts_tx_en)) {
-			bdp->cbd_esc = (BD_ENET_TX_TS | BD_ENET_TX_INT);
+			ebdp->cbd_esc = (BD_ENET_TX_TS | BD_ENET_TX_INT);
 			skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
-	} else {
+		} else {
 
-		bdp->cbd_esc = BD_ENET_TX_INT;
+			ebdp->cbd_esc = BD_ENET_TX_INT;
+		}
 	}
-#endif
 	/* Trigger transmission start */
 	writel(0, fep->hwp + FEC_X_DES_ACTIVE);
 
@@ -298,7 +325,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 	if (status & BD_ENET_TX_WRAP)
 		bdp = fep->tx_bd_base;
 	else
-		bdp++;
+		bdp = fec_enet_get_nextdesc(bdp, fep->bufdesc_ex);
 
 	if (bdp == fep->dirty_tx) {
 		fep->tx_full = 1;
@@ -359,8 +386,12 @@ fec_restart(struct net_device *ndev, int duplex)
 
 	/* Set receive and transmit descriptor base. */
 	writel(fep->bd_dma, fep->hwp + FEC_R_DES_START);
-	writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc) * RX_RING_SIZE,
-			fep->hwp + FEC_X_DES_START);
+	if (fep->bufdesc_ex)
+		writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc_ex)
+			* RX_RING_SIZE, fep->hwp + FEC_X_DES_START);
+	else
+		writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc)
+			* RX_RING_SIZE,	fep->hwp + FEC_X_DES_START);
 
 	fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
 	fep->cur_rx = fep->rx_bd_base;
@@ -448,17 +479,16 @@ fec_restart(struct net_device *ndev, int duplex)
 		writel(1 << 8, fep->hwp + FEC_X_WMRK);
 	}
 
-#ifdef CONFIG_FEC_PTP
-	ecntl |= (1 << 4);
-#endif
+	if (fep->bufdesc_ex)
+		ecntl |= (1 << 4);
 
 	/* And last, enable the transmit and receive processing */
 	writel(ecntl, fep->hwp + FEC_ECNTRL);
 	writel(0, fep->hwp + FEC_R_DES_ACTIVE);
 
-#ifdef CONFIG_FEC_PTP
-	fec_ptp_start_cyclecounter(ndev);
-#endif
+	if (fep->bufdesc_ex)
+		fec_ptp_start_cyclecounter(ndev);
+
 	/* Enable interrupts we wish to service */
 	writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
 }
@@ -544,19 +574,20 @@ fec_enet_tx(struct net_device *ndev)
 			ndev->stats.tx_packets++;
 		}
 
-#ifdef CONFIG_FEC_PTP
-		if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
+		if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS) &&
+			fep->bufdesc_ex) {
 			struct skb_shared_hwtstamps shhwtstamps;
 			unsigned long flags;
+			struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
 
 			memset(&shhwtstamps, 0, sizeof(shhwtstamps));
 			spin_lock_irqsave(&fep->tmreg_lock, flags);
 			shhwtstamps.hwtstamp = ns_to_ktime(
-				timecounter_cyc2time(&fep->tc, bdp->ts));
+				timecounter_cyc2time(&fep->tc, ebdp->ts));
 			spin_unlock_irqrestore(&fep->tmreg_lock, flags);
 			skb_tstamp_tx(skb, &shhwtstamps);
 		}
-#endif
+
 		if (status & BD_ENET_TX_READY)
 			printk("HEY! Enet xmit interrupt and TX_READY.\n");
 
@@ -575,7 +606,7 @@ fec_enet_tx(struct net_device *ndev)
 		if (status & BD_ENET_TX_WRAP)
 			bdp = fep->tx_bd_base;
 		else
-			bdp++;
+			bdp = fec_enet_get_nextdesc(bdp, fep->bufdesc_ex);
 
 		/* Since we have freed up a buffer, the ring is no longer full
 		 */
@@ -683,21 +714,23 @@ fec_enet_rx(struct net_device *ndev)
 			skb_put(skb, pkt_len - 4);	/* Make room */
 			skb_copy_to_linear_data(skb, data, pkt_len - 4);
 			skb->protocol = eth_type_trans(skb, ndev);
-#ifdef CONFIG_FEC_PTP
+
 			/* Get receive timestamp from the skb */
-			if (fep->hwts_rx_en) {
+			if (fep->hwts_rx_en && fep->bufdesc_ex) {
 				struct skb_shared_hwtstamps *shhwtstamps =
 							    skb_hwtstamps(skb);
 				unsigned long flags;
+				struct bufdesc_ex *ebdp =
+					(struct bufdesc_ex *)bdp;
 
 				memset(shhwtstamps, 0, sizeof(*shhwtstamps));
 
 				spin_lock_irqsave(&fep->tmreg_lock, flags);
 				shhwtstamps->hwtstamp = ns_to_ktime(
-				    timecounter_cyc2time(&fep->tc, bdp->ts));
+				    timecounter_cyc2time(&fep->tc, ebdp->ts));
 				spin_unlock_irqrestore(&fep->tmreg_lock, flags);
 			}
-#endif
+
 			if (!skb_defer_rx_timestamp(skb))
 				netif_rx(skb);
 		}
@@ -712,17 +745,19 @@ rx_processing_done:
 		status |= BD_ENET_RX_EMPTY;
 		bdp->cbd_sc = status;
 
-#ifdef CONFIG_FEC_PTP
-		bdp->cbd_esc = BD_ENET_RX_INT;
-		bdp->cbd_prot = 0;
-		bdp->cbd_bdu = 0;
-#endif
+		if (fep->bufdesc_ex) {
+			struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
+
+			ebdp->cbd_esc = BD_ENET_RX_INT;
+			ebdp->cbd_prot = 0;
+			ebdp->cbd_bdu = 0;
+		}
 
 		/* Update BD pointer to next entry */
 		if (status & BD_ENET_RX_WRAP)
 			bdp = fep->rx_bd_base;
 		else
-			bdp++;
+			bdp = fec_enet_get_nextdesc(bdp, fep->bufdesc_ex);
 		/* Doing this here will keep the FEC running while we process
 		 * incoming frames.  On a heavily loaded network, we should be
 		 * able to keep up at the expense of system resources.
@@ -1157,10 +1192,9 @@ static int fec_enet_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
 	if (!phydev)
 		return -ENODEV;
 
-#ifdef CONFIG_FEC_PTP
-	if (cmd == SIOCSHWTSTAMP)
+	if (cmd == SIOCSHWTSTAMP && fep->bufdesc_ex)
 		return fec_ptp_ioctl(ndev, rq, cmd);
-#endif
+
 	return phy_mii_ioctl(phydev, rq, cmd);
 }
 
@@ -1180,7 +1214,7 @@ static void fec_enet_free_buffers(struct net_device *ndev)
 					FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
 		if (skb)
 			dev_kfree_skb(skb);
-		bdp++;
+		bdp = fec_enet_get_nextdesc(bdp, fep->bufdesc_ex);
 	}
 
 	bdp = fep->tx_bd_base;
@@ -1207,14 +1241,17 @@ static int fec_enet_alloc_buffers(struct net_device *ndev)
 		bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, skb->data,
 				FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
 		bdp->cbd_sc = BD_ENET_RX_EMPTY;
-#ifdef CONFIG_FEC_PTP
-		bdp->cbd_esc = BD_ENET_RX_INT;
-#endif
-		bdp++;
+
+		if (fep->bufdesc_ex) {
+			struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
+			ebdp->cbd_esc = BD_ENET_RX_INT;
+		}
+
+		bdp = fec_enet_get_nextdesc(bdp, fep->bufdesc_ex);
 	}
 
 	/* Set the last buffer to wrap. */
-	bdp--;
+	bdp = fec_enet_get_prevdesc(bdp, fep->bufdesc_ex);
 	bdp->cbd_sc |= BD_SC_WRAP;
 
 	bdp = fep->tx_bd_base;
@@ -1224,14 +1261,16 @@ static int fec_enet_alloc_buffers(struct net_device *ndev)
 		bdp->cbd_sc = 0;
 		bdp->cbd_bufaddr = 0;
 
-#ifdef CONFIG_FEC_PTP
-		bdp->cbd_esc = BD_ENET_RX_INT;
-#endif
-		bdp++;
+		if (fep->bufdesc_ex) {
+			struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
+			ebdp->cbd_esc = BD_ENET_RX_INT;
+		}
+
+		bdp = fec_enet_get_nextdesc(bdp, fep->bufdesc_ex);
 	}
 
 	/* Set the last buffer to wrap. */
-	bdp--;
+	bdp = fec_enet_get_prevdesc(bdp, fep->bufdesc_ex);
 	bdp->cbd_sc |= BD_SC_WRAP;
 
 	return 0;
@@ -1444,7 +1483,11 @@ static int fec_enet_init(struct net_device *ndev)
 
 	/* Set receive and transmit descriptor base. */
 	fep->rx_bd_base = cbd_base;
-	fep->tx_bd_base = cbd_base + RX_RING_SIZE;
+	if (fep->bufdesc_ex)
+		fep->tx_bd_base = (struct bufdesc *)
+			(((struct bufdesc_ex *)cbd_base) + RX_RING_SIZE);
+	else
+		fep->tx_bd_base = cbd_base + RX_RING_SIZE;
 
 	/* The FEC Ethernet specific entries in the device structure */
 	ndev->watchdog_timeo = TX_TIMEOUT;
@@ -1457,11 +1500,11 @@ static int fec_enet_init(struct net_device *ndev)
 
 		/* Initialize the BD for every fragment in the page. */
 		bdp->cbd_sc = 0;
-		bdp++;
+		bdp = fec_enet_get_nextdesc(bdp, fep->bufdesc_ex);
 	}
 
 	/* Set the last buffer to wrap */
-	bdp--;
+	bdp = fec_enet_get_prevdesc(bdp, fep->bufdesc_ex);
 	bdp->cbd_sc |= BD_SC_WRAP;
 
 	/* ...and the same for transmit */
@@ -1471,11 +1514,11 @@ static int fec_enet_init(struct net_device *ndev)
 		/* Initialize the BD for every fragment in the page. */
 		bdp->cbd_sc = 0;
 		bdp->cbd_bufaddr = 0;
-		bdp++;
+		bdp = fec_enet_get_nextdesc(bdp, fep->bufdesc_ex);
 	}
 
 	/* Set the last buffer to wrap */
-	bdp--;
+	bdp = fec_enet_get_prevdesc(bdp, fep->bufdesc_ex);
 	bdp->cbd_sc |= BD_SC_WRAP;
 
 	fec_restart(ndev, 0);
@@ -1574,6 +1617,8 @@ fec_probe(struct platform_device *pdev)
 	fep->pdev = pdev;
 	fep->dev_id = dev_id++;
 
+	fep->bufdesc_ex = 0;
+
 	if (!fep->hwp) {
 		ret = -ENOMEM;
 		goto failed_ioremap;
@@ -1628,19 +1673,19 @@ fec_probe(struct platform_device *pdev)
 		goto failed_clk;
 	}
 
-#ifdef CONFIG_FEC_PTP
 	fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp");
+	fep->bufdesc_ex =
+		pdev->id_entry->driver_data & FEC_QUIRK_HAS_BUFDESC_EX;
 	if (IS_ERR(fep->clk_ptp)) {
 		ret = PTR_ERR(fep->clk_ptp);
-		goto failed_clk;
+		fep->bufdesc_ex = 0;
 	}
-#endif
 
 	clk_prepare_enable(fep->clk_ahb);
 	clk_prepare_enable(fep->clk_ipg);
-#ifdef CONFIG_FEC_PTP
-	clk_prepare_enable(fep->clk_ptp);
-#endif
+	if (!IS_ERR(fep->clk_ptp))
+		clk_prepare_enable(fep->clk_ptp);
+
 	reg_phy = devm_regulator_get(&pdev->dev, "phy");
 	if (!IS_ERR(reg_phy)) {
 		ret = regulator_enable(reg_phy);
@@ -1668,9 +1713,8 @@ fec_probe(struct platform_device *pdev)
 	if (ret)
 		goto failed_register;
 
-#ifdef CONFIG_FEC_PTP
-	fec_ptp_init(ndev, pdev);
-#endif
+	if (fep->bufdesc_ex)
+		fec_ptp_init(ndev, pdev);
 
 	return 0;
 
@@ -1681,9 +1725,8 @@ failed_init:
 failed_regulator:
 	clk_disable_unprepare(fep->clk_ahb);
 	clk_disable_unprepare(fep->clk_ipg);
-#ifdef CONFIG_FEC_PTP
-	clk_disable_unprepare(fep->clk_ptp);
-#endif
+	if (!IS_ERR(fep->clk_ptp))
+		clk_disable_unprepare(fep->clk_ptp);
 failed_pin:
 failed_clk:
 	for (i = 0; i < FEC_IRQ_NUM; i++) {
@@ -1716,12 +1759,10 @@ fec_drv_remove(struct platform_device *pdev)
 		if (irq > 0)
 			free_irq(irq, ndev);
 	}
-#ifdef CONFIG_FEC_PTP
 	del_timer_sync(&fep->time_keep);
 	clk_disable_unprepare(fep->clk_ptp);
 	if (fep->ptp_clock)
 		ptp_clock_unregister(fep->ptp_clock);
-#endif
 	clk_disable_unprepare(fep->clk_ahb);
 	clk_disable_unprepare(fep->clk_ipg);
 	iounmap(fep->hwp);