FS_ENET: Add polling support

Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

5 files changed, 80 insertions, 63 deletions

diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c
index 83c9bf27ecf..dcbe83c773e 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -1,17 +1,17 @@
 /*
  * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
  *
- * Copyright (c) 2003 Intracom S.A. 
+ * Copyright (c) 2003 Intracom S.A.
  *  by Pantelis Antoniou <panto@intracom.gr>
- * 
- * 2005 (c) MontaVista Software, Inc. 
+ *
+ * 2005 (c) MontaVista Software, Inc.
  * Vitaly Bordug <vbordug@ru.mvista.com>
  *
  * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
  * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
  *
- * This file is licensed under the terms of the GNU General Public License 
- * version 2. This program is licensed "as is" without any warranty of any 
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
  * kind, whether express or implied.
  */
 
@@ -59,6 +59,9 @@ module_param(fs_enet_debug, int, 0);
 MODULE_PARM_DESC(fs_enet_debug,
 		 "Freescale bitmapped debugging message enable value");
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void fs_enet_netpoll(struct net_device *dev);
+#endif
 
 static void fs_set_multicast_list(struct net_device *dev)
 {
@@ -104,7 +107,7 @@ static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
 			       dev->name);
 
 		/*
-		 * Check for errors. 
+		 * Check for errors.
 		 */
 		if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
 			  BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
@@ -181,7 +184,7 @@ static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
 		CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
 
 		/*
-		 * Update BD pointer to next entry. 
+		 * Update BD pointer to next entry.
 		 */
 		if ((sc & BD_ENET_RX_WRAP) == 0)
 			bdp++;
@@ -234,7 +237,7 @@ static int fs_enet_rx_non_napi(struct net_device *dev)
 			       dev->name);
 
 		/*
-		 * Check for errors. 
+		 * Check for errors.
 		 */
 		if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
 			  BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
@@ -312,7 +315,7 @@ static int fs_enet_rx_non_napi(struct net_device *dev)
 		CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
 
 		/*
-		 * Update BD pointer to next entry. 
+		 * Update BD pointer to next entry.
 		 */
 		if ((sc & BD_ENET_RX_WRAP) == 0)
 			bdp++;
@@ -349,7 +352,7 @@ static void fs_enet_tx(struct net_device *dev)
 		skb = fep->tx_skbuff[dirtyidx];
 
 		/*
-		 * Check for errors. 
+		 * Check for errors.
 		 */
 		if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
 			  BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
@@ -389,13 +392,13 @@ static void fs_enet_tx(struct net_device *dev)
 				skb->len, DMA_TO_DEVICE);
 
 		/*
-		 * Free the sk buffer associated with this last transmit. 
+		 * Free the sk buffer associated with this last transmit.
 		 */
 		dev_kfree_skb_irq(skb);
 		fep->tx_skbuff[dirtyidx] = NULL;
 
 		/*
-		 * Update pointer to next buffer descriptor to be transmitted. 
+		 * Update pointer to next buffer descriptor to be transmitted.
 		 */
 		if ((sc & BD_ENET_TX_WRAP) == 0)
 			bdp++;
@@ -491,7 +494,7 @@ void fs_init_bds(struct net_device *dev)
 	fep->cur_rx = fep->rx_bd_base;
 
 	/*
-	 * Initialize the receive buffer descriptors. 
+	 * Initialize the receive buffer descriptors.
 	 */
 	for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
 		skb = dev_alloc_skb(ENET_RX_FRSIZE);
@@ -511,7 +514,7 @@ void fs_init_bds(struct net_device *dev)
 			((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
 	}
 	/*
-	 * if we failed, fillup remainder 
+	 * if we failed, fillup remainder
 	 */
 	for (; i < fep->rx_ring; i++, bdp++) {
 		fep->rx_skbuff[i] = NULL;
@@ -519,7 +522,7 @@ void fs_init_bds(struct net_device *dev)
 	}
 
 	/*
-	 * ...and the same for transmit.  
+	 * ...and the same for transmit.
 	 */
 	for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
 		fep->tx_skbuff[i] = NULL;
@@ -537,7 +540,7 @@ void fs_cleanup_bds(struct net_device *dev)
 	int i;
 
 	/*
-	 * Reset SKB transmit buffers.  
+	 * Reset SKB transmit buffers.
 	 */
 	for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
 		if ((skb = fep->tx_skbuff[i]) == NULL)
@@ -552,7 +555,7 @@ void fs_cleanup_bds(struct net_device *dev)
 	}
 
 	/*
-	 * Reset SKB receive buffers 
+	 * Reset SKB receive buffers
 	 */
 	for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
 		if ((skb = fep->rx_skbuff[i]) == NULL)
@@ -582,7 +585,7 @@ static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	spin_lock_irqsave(&fep->tx_lock, flags);
 
 	/*
-	 * Fill in a Tx ring entry 
+	 * Fill in a Tx ring entry
 	 */
 	bdp = fep->cur_tx;
 
@@ -601,19 +604,19 @@ static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	curidx = bdp - fep->tx_bd_base;
 	/*
-	 * Clear all of the status flags. 
+	 * Clear all of the status flags.
 	 */
 	CBDC_SC(bdp, BD_ENET_TX_STATS);
 
 	/*
-	 * Save skb pointer. 
+	 * Save skb pointer.
 	 */
 	fep->tx_skbuff[curidx] = skb;
 
 	fep->stats.tx_bytes += skb->len;
 
 	/*
-	 * Push the data cache so the CPM does not get stale memory data. 
+	 * Push the data cache so the CPM does not get stale memory data.
 	 */
 	CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
 				skb->data, skb->len, DMA_TO_DEVICE));
@@ -622,7 +625,7 @@ static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	dev->trans_start = jiffies;
 
 	/*
-	 * If this was the last BD in the ring, start at the beginning again. 
+	 * If this was the last BD in the ring, start at the beginning again.
 	 */
 	if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
 		fep->cur_tx++;
@@ -1003,13 +1006,13 @@ static struct net_device *fs_init_instance(struct device *dev,
 	spin_lock_init(&fep->tx_lock);
 
 	/*
-	 * Set the Ethernet address. 
+	 * Set the Ethernet address.
 	 */
 	for (i = 0; i < 6; i++)
 		ndev->dev_addr[i] = fpi->macaddr[i];
-	
+
 	r = (*fep->ops->allocate_bd)(ndev);
-	
+
 	if (fep->ring_base == NULL) {
 		printk(KERN_ERR DRV_MODULE_NAME
 		       ": %s buffer descriptor alloc failed (%d).\n", ndev->name, r);
@@ -1028,7 +1031,7 @@ static struct net_device *fs_init_instance(struct device *dev,
 	fep->rx_ring = fpi->rx_ring;
 
 	/*
-	 * The FEC Ethernet specific entries in the device structure. 
+	 * The FEC Ethernet specific entries in the device structure.
 	 */
 	ndev->open = fs_enet_open;
 	ndev->hard_start_xmit = fs_enet_start_xmit;
@@ -1037,6 +1040,11 @@ static struct net_device *fs_init_instance(struct device *dev,
 	ndev->stop = fs_enet_close;
 	ndev->get_stats = fs_enet_get_stats;
 	ndev->set_multicast_list = fs_set_multicast_list;
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	ndev->poll_controller = fs_enet_netpoll;
+#endif
+
 	netif_napi_add(ndev, &fep->napi,
 		       fs_enet_rx_napi, fpi->napi_weight);
 
@@ -1251,7 +1259,7 @@ static int __init fs_init(void)
 err:
 	cleanup_immap();
 	return r;
-	
+
 }
 
 static void __exit fs_cleanup(void)
@@ -1262,6 +1270,15 @@ static void __exit fs_cleanup(void)
 	cleanup_immap();
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void fs_enet_netpoll(struct net_device *dev)
+{
+       disable_irq(dev->irq);
+       fs_enet_interrupt(dev->irq, dev, NULL);
+       enable_irq(dev->irq);
+}
+#endif
+
 /**************************************************************************************/
 
 module_init(fs_init);
diff --git a/drivers/net/fs_enet/mac-fcc.c b/drivers/net/fs_enet/mac-fcc.c
index 5603121132c..64071514d7d 100644
--- a/drivers/net/fs_enet/mac-fcc.c
+++ b/drivers/net/fs_enet/mac-fcc.c
@@ -1,14 +1,14 @@
 /*
  * FCC driver for Motorola MPC82xx (PQ2).
  *
- * Copyright (c) 2003 Intracom S.A. 
+ * Copyright (c) 2003 Intracom S.A.
  *  by Pantelis Antoniou <panto@intracom.gr>
  *
- * 2005 (c) MontaVista Software, Inc. 
+ * 2005 (c) MontaVista Software, Inc.
  * Vitaly Bordug <vbordug@ru.mvista.com>
  *
- * This file is licensed under the terms of the GNU General Public License 
- * version 2. This program is licensed "as is" without any warranty of any 
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
  * kind, whether express or implied.
  */
 
@@ -92,7 +92,7 @@ static inline int fcc_cr_cmd(struct fs_enet_private *fep, u32 mcn, u32 op)
 	u32 v;
 	int i;
 
-	/* Currently I don't know what feature call will look like. But 
+	/* Currently I don't know what feature call will look like. But
 	   I guess there'd be something like do_cpm_cmd() which will require page & sblock */
 	v = mk_cr_cmd(fpi->cp_page, fpi->cp_block, mcn, op);
 	W32(cpmp, cp_cpcr, v | CPM_CR_FLG);
@@ -548,7 +548,7 @@ int get_regs_len(struct net_device *dev)
  * down.  We now issue a restart transmit.  Since the
  * errors close the BD and update the pointers, the restart
  * _should_ pick up without having to reset any of our
- * pointers either.  Also, To workaround 8260 device erratum 
+ * pointers either.  Also, To workaround 8260 device erratum
  * CPM37, we must disable and then re-enable the transmitter
  * following a Late Collision, Underrun, or Retry Limit error.
  */
diff --git a/drivers/net/fs_enet/mac-fec.c b/drivers/net/fs_enet/mac-fec.c
index 04b4f80a1cd..cbdc17b743d 100644
--- a/drivers/net/fs_enet/mac-fec.c
+++ b/drivers/net/fs_enet/mac-fec.c
@@ -1,14 +1,14 @@
 /*
  * Freescale Ethernet controllers
  *
- * Copyright (c) 2005 Intracom S.A. 
+ * Copyright (c) 2005 Intracom S.A.
  *  by Pantelis Antoniou <panto@intracom.gr>
  *
- * 2005 (c) MontaVista Software, Inc. 
+ * 2005 (c) MontaVista Software, Inc.
  * Vitaly Bordug <vbordug@ru.mvista.com>
  *
- * This file is licensed under the terms of the GNU General Public License 
- * version 2. This program is licensed "as is" without any warranty of any 
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
  * kind, whether express or implied.
  */
 
@@ -95,9 +95,9 @@ static int whack_reset(fec_t * fecp)
 
 static int do_pd_setup(struct fs_enet_private *fep)
 {
-	struct platform_device *pdev = to_platform_device(fep->dev); 
+	struct platform_device *pdev = to_platform_device(fep->dev);
 	struct resource	*r;
-	
+
 	/* Fill out IRQ field */
 	fep->interrupt = platform_get_irq_byname(pdev,"interrupt");
 	if (fep->interrupt < 0)
@@ -110,7 +110,7 @@ static int do_pd_setup(struct fs_enet_private *fep)
 		return -EINVAL;
 
 	return 0;
-	
+
 }
 
 #define FEC_NAPI_RX_EVENT_MSK	(FEC_ENET_RXF | FEC_ENET_RXB)
@@ -141,7 +141,7 @@ static int allocate_bd(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	const struct fs_platform_info *fpi = fep->fpi;
-	
+
 	fep->ring_base = dma_alloc_coherent(fep->dev,
 					    (fpi->tx_ring + fpi->rx_ring) *
 					    sizeof(cbd_t), &fep->ring_mem_addr,
@@ -280,13 +280,13 @@ static void restart(struct net_device *dev)
 	FW(fecp, addr_high, addrlo);
 
 	/*
-	 * Reset all multicast. 
+	 * Reset all multicast.
 	 */
 	FW(fecp, hash_table_high, fep->fec.hthi);
 	FW(fecp, hash_table_low, fep->fec.htlo);
 
 	/*
-	 * Set maximum receive buffer size. 
+	 * Set maximum receive buffer size.
 	 */
 	FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
 	FW(fecp, r_hash, PKT_MAXBUF_SIZE);
@@ -296,7 +296,7 @@ static void restart(struct net_device *dev)
 	tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
 
 	/*
-	 * Set receive and transmit descriptor base. 
+	 * Set receive and transmit descriptor base.
 	 */
 	FW(fecp, r_des_start, rx_bd_base_phys);
 	FW(fecp, x_des_start, tx_bd_base_phys);
@@ -304,7 +304,7 @@ static void restart(struct net_device *dev)
 	fs_init_bds(dev);
 
 	/*
-	 * Enable big endian and don't care about SDMA FC. 
+	 * Enable big endian and don't care about SDMA FC.
 	 */
 	FW(fecp, fun_code, 0x78000000);
 
@@ -366,13 +366,13 @@ static void restart(struct net_device *dev)
 	}
 
 	/*
-	 * Enable interrupts we wish to service. 
+	 * Enable interrupts we wish to service.
 	 */
 	FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
 	   FEC_ENET_RXF | FEC_ENET_RXB);
 
 	/*
-	 * And last, enable the transmit and receive processing. 
+	 * And last, enable the transmit and receive processing.
 	 */
 	FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
 	FW(fecp, r_des_active, 0x01000000);
@@ -401,7 +401,7 @@ static void stop(struct net_device *dev)
 		       ": %s FEC timeout on graceful transmit stop\n",
 		       dev->name);
 	/*
-	 * Disable FEC. Let only MII interrupts. 
+	 * Disable FEC. Let only MII interrupts.
 	 */
 	FW(fecp, imask, 0);
 	FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);
diff --git a/drivers/net/fs_enet/mac-scc.c b/drivers/net/fs_enet/mac-scc.c
index 7540966687e..6f32674a78e 100644
--- a/drivers/net/fs_enet/mac-scc.c
+++ b/drivers/net/fs_enet/mac-scc.c
@@ -1,14 +1,14 @@
 /*
  * Ethernet on Serial Communications Controller (SCC) driver for Motorola MPC8xx and MPC82xx.
  *
- * Copyright (c) 2003 Intracom S.A. 
+ * Copyright (c) 2003 Intracom S.A.
  *  by Pantelis Antoniou <panto@intracom.gr>
- * 
- * 2005 (c) MontaVista Software, Inc. 
+ *
+ * 2005 (c) MontaVista Software, Inc.
  * Vitaly Bordug <vbordug@ru.mvista.com>
  *
- * This file is licensed under the terms of the GNU General Public License 
- * version 2. This program is licensed "as is" without any warranty of any 
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
  * kind, whether express or implied.
  */
 
@@ -82,7 +82,7 @@
 #define SCC_MAX_MULTICAST_ADDRS	64
 
 /*
- * Delay to wait for SCC reset command to complete (in us) 
+ * Delay to wait for SCC reset command to complete (in us)
  */
 #define SCC_RESET_DELAY		50
 #define MAX_CR_CMD_LOOPS	10000
@@ -189,7 +189,7 @@ static void cleanup_data(struct net_device *dev)
 }
 
 static void set_promiscuous_mode(struct net_device *dev)
-{				
+{
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t *sccp = fep->scc.sccp;
 
@@ -323,7 +323,7 @@ static void restart(struct net_device *dev)
 	W16(ep, sen_iaddr3, 0);
 	W16(ep, sen_iaddr4, 0);
 
-	/* set address 
+	/* set address
 	 */
 	mac = dev->dev_addr;
 	paddrh = ((u16) mac[5] << 8) | mac[4];
@@ -345,7 +345,7 @@ static void restart(struct net_device *dev)
 
 	W16(sccp, scc_scce, 0xffff);
 
-	/* Enable interrupts we wish to service. 
+	/* Enable interrupts we wish to service.
 	 */
 	W16(sccp, scc_sccm, SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB);
 
@@ -373,7 +373,7 @@ static void restart(struct net_device *dev)
 	S32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
 }
 
-static void stop(struct net_device *dev)	
+static void stop(struct net_device *dev)
 {
 	struct fs_enet_private *fep = netdev_priv(dev);
 	scc_t *sccp = fep->scc.sccp;
diff --git a/drivers/net/fs_enet/mii-bitbang.c b/drivers/net/fs_enet/mii-bitbang.c
index d3840108ffb..1a41ea60f98 100644
--- a/drivers/net/fs_enet/mii-bitbang.c
+++ b/drivers/net/fs_enet/mii-bitbang.c
@@ -1,14 +1,14 @@
 /*
  * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
  *
- * Copyright (c) 2003 Intracom S.A. 
+ * Copyright (c) 2003 Intracom S.A.
  *  by Pantelis Antoniou <panto@intracom.gr>
- * 
- * 2005 (c) MontaVista Software, Inc. 
+ *
+ * 2005 (c) MontaVista Software, Inc.
  * Vitaly Bordug <vbordug@ru.mvista.com>
  *
- * This file is licensed under the terms of the GNU General Public License 
- * version 2. This program is licensed "as is" without any warranty of any 
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
  * kind, whether express or implied.
  */