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* [PATCH 8/9] Resending NetXen 1G/10G NIC driver patch
@ 2006-05-25 10:57 Linsys Contractor Amit S. Kale
  2006-05-25 16:44 ` Roland Dreier
  2006-05-25 17:03 ` Stephen Hemminger
  0 siblings, 2 replies; 5+ messages in thread
From: Linsys Contractor Amit S. Kale @ 2006-05-25 10:57 UTC (permalink / raw)
  To: netdev; +Cc: sanjeev, unmproj

diff -Naru linux-2.6.16.18.orig/drivers/net/netxen/netxen_nic_main.c linux-2.6.16.18/drivers/net/netxen/netxen_nic_main.c
--- linux-2.6.16.18.orig/drivers/net/netxen/netxen_nic_main.c	1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.16.18/drivers/net/netxen/netxen_nic_main.c	2006-05-25 02:43:22.000000000 -0700
@@ -0,0 +1,1209 @@
+/*
+ * Copyright (C) 2003 - 2006 NetXen, Inc.
+ * All rights reserved.
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *                            
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *                                   
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA  02111-1307, USA.
+ * 
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.
+ * 
+ * Contact Information:
+ *    info@netxen.com
+ * NetXen,
+ * 3965 Freedom Circle, Fourth floor,
+ * Santa Clara, CA 95054
+ *
+ *
+ *  Main source file for NetXen NIC Driver on Linux
+ *
+ */
+
+#include "netxen_nic.h"
+
+#define DEFINE_GLOBAL_RECV_CRB
+#include "netxen_nic_phan_reg.h"
+#include "netxen_nic_ioctl.h"
+
+MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
+
+char netxen_nic_driver_name[] = "netxen";
+char netxen_nic_driver_string[] = "NetXen Network Driver version "
+    NETXEN_NIC_LINUX_VERSIONID
+    "-" NETXEN_NIC_BUILD_NO " generated " NETXEN_NIC_TIMESTAMP;
+
+#define NETXEN_NETDEV_WEIGHT 120
+#define NETXEN_ADAPTER_UP_MAGIC 777
+
+static int netxen_nic_probe_err = 0;
+
+/* Local functions to NetXen NIC driver */
+static int __devinit netxen_nic_probe(struct pci_dev *pdev,
+				      const struct pci_device_id *ent);
+static void __devexit netxen_nic_remove(struct pci_dev *pdev);
+static int netxen_nic_open(struct net_device *netdev);
+static int netxen_nic_close(struct net_device *netdev);
+static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
+static void netxen_tx_timeout(struct net_device *netdev);
+static void netxen_tx_timeout_task(struct net_device *netdev);
+static void netxen_watchdog(unsigned long);
+static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
+static int netxen_nic_ioctl(struct net_device *netdev,
+			    struct ifreq *ifr, int cmd);
+static int netxen_nic_poll(struct net_device *dev, int *budget);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void netxen_nic_poll_controller(struct net_device *netdev);
+#endif
+static irqreturn_t netxen_intr(int irq, void *data, struct pt_regs *regs);
+
+/*  PCI Device ID Table  */
+static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
+	NETXEN_PCI_ID(PCI_DEVICE_ID_NX_QG),
+	NETXEN_PCI_ID(PCI_DEVICE_ID_NX_XG),
+	NETXEN_PCI_ID(PCI_DEVICE_ID_NX_CX4),
+	NETXEN_PCI_ID(PCI_DEVICE_ID_NX_IMEZ),
+	NETXEN_PCI_ID(PCI_DEVICE_ID_NX_HMEZ),
+	{0,}
+};
+
+MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
+
+struct netxen_adapter *adapterlist[MAX_NUM_CARDS];
+
+/*
+ * netxen_nic_probe()
+ *
+ * Linux system will invoke this after identifying the vendor ID and device Id
+ * in the pci_tbl where this module will search for NetXen vendor and device ID for
+ * quad port adapter.
+ *
+ * Even though there are 4 seperate devices (functions) on the quad port NIC, but
+ * the probe will be invoked for the first device (function) only. This will
+ * initialize the adapter, and setup the global parameters along with the port's
+ * specific structure.
+ */
+static int __devinit
+netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct net_device *netdev = NULL;
+	struct netxen_adapter *adapter = NULL;
+	struct netxen_port *port = NULL;
+	u8 *mem_ptr = NULL;
+	unsigned long mem_base, mem_len;
+	int pci_using_dac, i, err;
+	int boardno = 0;
+	int ring;
+	struct netdev_list *netlist = NULL;
+	struct netxen_recv_context *recv_ctx = NULL;
+	struct netxen_rcv_desc_ctx *rcv_desc = NULL;
+	struct netxen_cmd_buffer *cmd_buf_arr = NULL;
+	static int netxen_cards_found = 0;
+	u64 mac_addr[FLASH_NUM_PORTS + 1];
+	int valid_mac;
+
+	if ((err = pci_enable_device(pdev))) {
+		netxen_nic_probe_err = err;
+		return err;
+	}
+	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
+		err = -ENODEV;
+		goto err_out_disable_pdev;
+	}
+
+	if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
+		goto err_out_disable_pdev;
+
+	pci_set_master(pdev);
+	if ((pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) &&
+	    (pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK) == 0))
+		pci_using_dac = 1;
+	else {
+		if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
+		    (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
+			goto err_out_free_res;
+
+		pci_using_dac = 0;
+	}
+
+	/* remap phys address */
+	mem_base = pci_resource_start(pdev, 0);	/* 0 is for BAR 0 */
+	mem_len = pci_resource_len(pdev, 0);
+
+	/* 128 Meg of memory */
+	mem_ptr = ioremap(mem_base, NETXEN_PCI_MAPSIZE_BYTES);
+	if (mem_ptr == 0UL) {
+		printk(KERN_ERR "%s: Cannot ioremap adapter memory aborting."
+		       ":%p\n", netxen_nic_driver_name, mem_ptr);
+		err = -EIO;
+		goto err_out_free_res;
+	}
+
+/*
+ *      Allocate a adapter structure which will manage all the initialization
+ *      as well as the common resources for all ports...
+ *      all the ports will have pointer to this adapter as well as Adapter
+ *      will have pointers of all the ports structures.
+ */
+
+	/* One adapter structure for all 4 ports....   */
+	adapter = kzalloc(sizeof(struct netxen_adapter), GFP_KERNEL);
+	if (adapter == NULL) {
+		printk(KERN_ERR "%s: Could not allocate adapter memory:%d\n",
+		       netxen_nic_driver_name,
+		       (int)sizeof(struct netxen_adapter));
+		err = -ENOMEM;
+		goto err_out_iounmap;
+	}
+
+	adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
+	adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
+	adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
+
+	cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
+	if (cmd_buf_arr == NULL) {
+		err = -ENOMEM;
+		goto err_out_free_adapter;
+	}
+	memset(cmd_buf_arr, 0, TX_RINGSIZE);
+
+	for (i = 0; i < MAX_RCV_CTX; ++i) {
+		recv_ctx = &adapter->recv_ctx[i];
+		for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
+			rcv_desc = &recv_ctx->rcv_desc[ring];
+			switch (RCV_DESC_TYPE(ring)) {
+			case RCV_DESC_NORMAL:
+				rcv_desc->max_rx_desc_count =
+				    adapter->max_rx_desc_count;
+				rcv_desc->flags = RCV_DESC_NORMAL;
+				rcv_desc->dma_size = RX_DMA_MAP_LEN;
+				rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
+				break;
+
+			case RCV_DESC_JUMBO:
+				rcv_desc->max_rx_desc_count =
+				    adapter->max_jumbo_rx_desc_count;
+				rcv_desc->flags = RCV_DESC_JUMBO;
+				rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
+				rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
+				break;
+
+			default:
+				printk("%s: netxen_nic_probe: bad receive "
+				       "descriptor type %d\n",
+				       netxen_nic_driver_name,
+				       RCV_DESC_TYPE(ring));
+				break;
+			}
+			rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
+			    pci_alloc_consistent(pdev,
+						 RCV_BUFFSIZE,
+						 &rcv_desc->rx_buf_phys);
+
+			if (rcv_desc->rx_buf_arr == NULL) {
+				err = -ENOMEM;
+				goto err_out_free_rx_buffer;
+			}
+			memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
+		}
+
+	}
+
+	adapter->cmd_buf_arr = cmd_buf_arr;
+	adapter->ahw.pci_base = (unsigned long)mem_ptr;
+	adapter->ahw.pci_len = mem_len;
+	adapter->ahw.crb_base = adapter->ahw.pci_base + NETXEN_PCI_CRBSPACE;
+	rwlock_init(&adapter->adapter_lock);
+	spin_lock_init(&adapter->tx_lock);
+	spin_lock_init(&adapter->lock);
+	initialize_adapter_sw(adapter);	/* initialize the buffers in adapter */
+	/*
+	 * Set the CRB window to invalid. If any register in window 0 is
+	 * accessed it should set the window to 0 and then reset it to 1.
+	 */
+	adapter->curr_window = 255;
+	/*
+	 *  Adapter in our case is quad port so initialize it beofore
+	 *  initializing the ports
+	 */
+	initialize_adapter_hw(adapter);	/* initialize the adapter */
+	adapter->port = kcalloc(adapter->ahw.max_ports,
+				sizeof(struct netxen_adapter), GFP_KERNEL);
+	if (adapter->port == NULL) {
+		err = -ENOMEM;
+		goto err_out_free_rx_buffer;
+	}
+	init_timer(&adapter->watchdog_timer);
+	adapter->ahw.xg_linkup = 0;
+	adapter->watchdog_timer.function = &netxen_watchdog;
+	adapter->watchdog_timer.data = (unsigned long)adapter;
+	INIT_WORK(&adapter->watchdog_task,
+		  (void (*)(void *))netxen_watchdog_task, adapter);
+	adapter->ahw.vendor_id = pdev->vendor;
+	adapter->ahw.device_id = pdev->device;
+	adapter->ahw.pdev = pdev;
+	adapter->proc_cmd_buf_counter = 0;
+	pci_read_config_byte(pdev, PCI_REVISION_ID, &adapter->ahw.revision_id);
+	pci_read_config_word(pdev, PCI_COMMAND, &adapter->ahw.pci_cmd_word);
+
+#if defined(CONFIG_PCI_MSI)
+	adapter->flags |= NETXEN_NIC_MSI_ENABLED;
+	if (pci_enable_msi(pdev)) {
+		adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
+		printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
+		       " error\n", netxen_nic_driver_name);
+	}
+#endif
+
+	if (is_flash_supported(adapter) == 0 &&
+	    get_flash_mac_addr(adapter, mac_addr) == 0)
+		valid_mac = 1;
+	else
+		valid_mac = 0;
+
+	/* initialize the all the ports */
+
+	for (i = 0; i < adapter->ahw.max_ports; i++) {
+		netlist = kzalloc(sizeof(struct netdev_list), GFP_KERNEL);
+		if (netlist == NULL)
+			goto err_out_free_dev;
+
+		netlist->netdev = alloc_etherdev(sizeof(struct netxen_port));
+		if (!netlist->netdev) {
+			printk(KERN_ERR "%s: could not allocate netdev for port"
+			       " %d\n", netxen_nic_driver_name, i + 1);
+			kfree(netlist);
+			goto err_out_free_dev;
+		}
+		netdev = netlist->netdev;
+
+		SET_MODULE_OWNER(netdev);
+
+		port = netdev_priv(netdev);
+		port->netdev = netdev;
+		port->pdev = pdev;
+		port->hw.port = port;
+		port->adapter = adapter;
+		port->portnum = i;	/* Gigabit port number starting from 0-3 */
+		port->flags &= ~NETXEN_NETDEV_STATUS;
+
+		netdev->open = netxen_nic_open;
+		netdev->stop = netxen_nic_close;
+		netdev->hard_start_xmit = netxen_nic_xmit_frame;
+		netdev->get_stats = netxen_nic_get_stats;
+		netdev->set_multicast_list = netxen_nic_set_multi;
+		netdev->set_mac_address = netxen_nic_set_mac;
+		netdev->change_mtu = netxen_nic_change_mtu;
+		netdev->do_ioctl = netxen_nic_ioctl;
+		netdev->tx_timeout = netxen_tx_timeout;
+
+		SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
+
+		netdev->irq = pdev->irq;
+		netdev->poll = netxen_nic_poll;
+		netdev->weight = NETXEN_NETDEV_WEIGHT;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+		netdev->poll_controller = netxen_nic_poll_controller;
+#endif
+		/* ScatterGather support */
+		netdev->features = NETIF_F_SG;
+		netdev->features |= NETIF_F_IP_CSUM;
+		netdev->features |= NETIF_F_TSO;
+
+		if (pci_using_dac)
+			netdev->features |= NETIF_F_HIGHDMA;
+
+		boardno = netxen_nic_get_board_num(adapter);
+		if (valid_mac) {
+			unsigned char *p = (unsigned char *)&mac_addr[i];
+			port->hw.mac_addr[0] = *(p + 5);
+			port->hw.mac_addr[1] = *(p + 4);
+			port->hw.mac_addr[2] = *(p + 3);
+			port->hw.mac_addr[3] = *(p + 2);
+			port->hw.mac_addr[4] = *(p + 1);
+			port->hw.mac_addr[5] = *(p + 0);
+
+			if (!is_valid_ether_addr(port->hw.mac_addr)) {
+				printk(KERN_ERR"%s: Bad MAC address" 
+				       "%02x:%02x:%02x:%02x:%02x:%02x.\n",
+				       netxen_nic_driver_name,
+				       port->hw.mac_addr[0],
+				       port->hw.mac_addr[1],
+				       port->hw.mac_addr[2],
+				       port->hw.mac_addr[3],
+				       port->hw.mac_addr[4],
+				       port->hw.mac_addr[5]);
+			} else {
+				memcpy(netdev->dev_addr, port->hw.mac_addr,
+				       netdev->addr_len);
+				netxen_nic_macaddr_set(port, port->hw.mac_addr);
+			}
+		}
+		INIT_WORK(adapter->tx_timeout_task + i,
+			  (void (*)(void *))netxen_tx_timeout_task, netdev);
+		netif_carrier_off(netdev);
+		netif_stop_queue(netdev);
+
+		if ((err = register_netdev(netdev))) {
+			printk(KERN_ERR "%s: register_netdev failed port #%d"
+			       " aborting\n", netxen_nic_driver_name, i + 1);
+			break;
+		}
+		adapter->active_ports = 0;
+		adapter->port_count++;	/* number of ports allocated */
+		adapter->port[i] = port;
+		netlist->next = pci_get_drvdata(pdev);
+		pci_set_drvdata(pdev, netlist);
+	}
+
+	/*
+	 * check how many ports were configured. If due to some errors,
+	 * the port count == NULL, then free up the adapter structure,
+	 * do iounmap() else add the adapter to the global adapter list
+	 */
+
+	if (!adapter->port_count) {
+		/* unable to configure any port */
+		err = -EIO;
+		goto err_out_free_dev;
+	}
+
+	adapter->netlist = netlist;
+
+	/*
+	 * Initialize all the CRB registers here.
+	 */
+	/* Window = 1 */
+	read_lock(&adapter->adapter_lock);
+	writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
+	writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
+	writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
+	read_unlock(&adapter->adapter_lock);
+
+	phantom_init(adapter);
+	/*
+	 * delay a while to ensure that the Pegs are up & running.
+	 * Otherwise, we might see some flaky behaviour.
+	 */
+	mdelay(1000);
+
+	switch (adapter->ahw.board_type) {
+	case NETXEN_BRDTYPE_P2_SB35_4G:
+		printk("%s: QUAD GbE board initialized\n",
+		       netxen_nic_driver_name);
+		break;
+
+	case NETXEN_BRDTYPE_P2_SB31_10G:
+	case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
+	case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
+	case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
+		printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
+		break;
+	}
+
+	adapter->driver_mismatch = 0;
+
+	adapterlist[netxen_cards_found++] = adapter;
+	adapter->number = netxen_cards_found;
+	netxen_nic_probe_err = 0;
+	return 0;
+
+      err_out_free_dev:
+	for (netlist = pci_get_drvdata(pdev); netlist != NULL;) {
+		struct netdev_list *prev;
+		unregister_netdev(netlist->netdev);
+		free_netdev(netlist->netdev);
+		prev = netlist;
+		netlist = netlist->next;
+		kfree(prev);
+	}
+	kfree(netlist);
+	pci_set_drvdata(pdev, NULL);
+
+      err_out_free_rx_buffer:
+	for (i = 0; i < MAX_RCV_CTX; ++i) {
+		recv_ctx = &adapter->recv_ctx[i];
+		for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
+			rcv_desc = &recv_ctx->rcv_desc[ring];
+			if (rcv_desc->rx_buf_arr != NULL) {
+				pci_free_consistent(pdev, RCV_BUFFSIZE,
+						    rcv_desc->rx_buf_arr,
+						    rcv_desc->rx_buf_phys);
+				rcv_desc->rx_buf_arr = NULL;
+			}
+		}
+	}
+
+	vfree(cmd_buf_arr);
+
+	kfree(adapter->port);
+
+      err_out_free_adapter:
+	kfree(adapter);
+
+      err_out_iounmap:
+	iounmap((u8 *) mem_ptr);
+      err_out_free_res:
+	pci_release_regions(pdev);
+      err_out_disable_pdev:
+	pci_disable_device(pdev);
+	pci_set_drvdata(pdev, NULL);
+	netxen_nic_probe_err = err;
+	return err;
+}
+
+static void __devexit netxen_nic_remove(struct pci_dev *pdev)
+{
+	struct netxen_adapter *adapter;
+	struct netdev_list *netlist;
+	struct netxen_rx_buffer *buffer;
+	struct netxen_recv_context *recv_ctx;
+	struct netxen_rcv_desc_ctx *rcv_desc;
+	int i;
+	int ctx, ring;
+
+	netlist = pci_get_drvdata(pdev);
+	if (netlist == NULL || netlist->netdev == NULL)
+		return;
+	adapter =
+	    ((struct netxen_port *)(netdev_priv(netlist->netdev)))->adapter;
+	if (adapter == NULL)
+		return;
+
+	netxen_nic_stop_all_ports(adapter);
+	/* leave the hw in the same state as reboot */
+	pinit_from_rom(adapter, 0);
+	udelay(500);
+	load_firmware(adapter);
+
+	if ((adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
+		read_lock(&adapter->adapter_lock);
+		netxen_nic_disable_int(adapter);
+		read_unlock(&adapter->adapter_lock);
+	}
+	udelay(500);		/* Delay for a while to drain the DMA engines */
+
+	netlist = pci_get_drvdata(pdev);
+	if (adapter->irq)
+		free_irq(adapter->irq, adapter);
+	if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
+		pci_disable_msi(pdev);
+	while (netlist != NULL) {
+		struct netdev_list *prev;
+
+		unregister_netdev(netlist->netdev);
+		free_netdev(netlist->netdev);
+		prev = netlist;
+		netlist = netlist->next;
+		kfree(prev);
+	}
+	adapter->netlist = NULL;
+	pci_set_drvdata(pdev, NULL);
+
+	netxen_free_hw_resources(adapter);
+
+	iounmap((u8 *) adapter->ahw.pci_base);
+
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+
+	for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
+		recv_ctx = &adapter->recv_ctx[ctx];
+		for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
+			rcv_desc = &recv_ctx->rcv_desc[ring];
+			for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
+				buffer = &(rcv_desc->rx_buf_arr[i]);
+				if (buffer->state == NETXEN_BUFFER_FREE)
+					continue;
+				pci_unmap_single(pdev, buffer->dma,
+						 rcv_desc->dma_size,
+						 PCI_DMA_FROMDEVICE);
+				if (buffer->skb != NULL)
+					dev_kfree_skb_any(buffer->skb);
+			}
+		}
+		for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
+			recv_ctx = &adapter->recv_ctx[ctx];
+			for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
+				rcv_desc = &recv_ctx->rcv_desc[ring];
+				pci_free_consistent(pdev, RCV_BUFFSIZE,
+						    rcv_desc->rx_buf_arr,
+						    rcv_desc->rx_buf_phys);
+			}
+		}
+	}
+
+	vfree(adapter->cmd_buf_arr);
+
+	kfree(adapter->port);
+	kfree(adapter);
+}
+
+/*
+ * Called when a network interface is made active
+ * @returns 0 on success, negative value on failure
+ */
+static int netxen_nic_open(struct net_device *netdev)
+{
+	struct netxen_port *port = netdev_priv(netdev);
+	struct netxen_adapter *adapter = port->adapter;
+	struct netxen_rcv_desc_ctx *rcv_desc;
+	int err = 0;
+	int ctx, ring;
+	static int opencount = 0;
+
+	if (!try_module_get(THIS_MODULE))
+		return -ENODEV;
+
+	if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
+		err = init_firmware(adapter);
+		if (err != 0) {
+			printk(KERN_ERR "Failed to init firmware\n");
+			module_put(THIS_MODULE);
+			return -EIO;
+		}
+		netxen_nic_flash_print(adapter);
+
+		printk("NetXen adapter %d\n", opencount);
+		adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
+		/* setup all the resources for the Phantom... */
+		/* this include the descriptors for rcv, tx, and status */
+		netxen_nic_clear_stats(adapter);
+		err = netxen_nic_hw_resources(adapter);
+		if (err) {
+			printk(KERN_ERR "Error in setting hw resources:%d\n",
+			       err);
+			module_put(THIS_MODULE);
+			return err;
+		}
+		if (netxen_nic_init_port(port) != 0) {
+			printk(KERN_ERR "%s: Failed to initialize port %d\n",
+			       netxen_nic_driver_name, port->portnum);
+			module_put(THIS_MODULE);
+			netxen_free_hw_resources(adapter);
+			return -EIO;
+		}
+		netxen_nic_init_niu(adapter);
+		for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
+			for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
+				rcv_desc =
+				    &adapter->recv_ctx[ctx].rcv_desc[ring];
+				netxen_post_rx_buffers(adapter, ctx, ring);
+			}
+		}
+
+		err = request_irq(netdev->irq, &netxen_intr,
+				  SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name,
+				  adapter);
+		if (err) {
+			printk(KERN_ERR "request_irq failed with: %d\n", err);
+			netxen_free_hw_resources(adapter);
+			module_put(THIS_MODULE);
+			return err;
+		}
+		adapter->irq = netdev->irq;
+		mod_timer(&adapter->watchdog_timer, jiffies);
+	}
+	++opencount;
+	adapter->active_ports++;
+	if (adapter->active_ports == 1) {
+		read_lock(&adapter->adapter_lock);
+		netxen_nic_enable_int(adapter);
+		read_unlock(&adapter->adapter_lock);
+	}
+
+	spin_lock_init(&port->stats_lock);
+
+	/* Done here again so that even if phantom sw overwrote it,
+	   we set it */
+	netxen_nic_macaddr_set(port, port->hw.mac_addr);
+	netxen_nic_set_link_parameters(port);
+
+	netxen_nic_set_multi(netdev);
+	if (!adapter->driver_mismatch)
+		netif_start_queue(netdev);
+
+	port->state = NETXEN_PORT_UP;
+	return 0;
+}
+
+/**
+ * netxen_nic_close - Disables a network interface entry point
+ **/
+static int netxen_nic_close(struct net_device *netdev)
+{
+	struct netxen_port *port = netdev_priv(netdev);
+
+	netif_carrier_off(netdev);
+	netif_stop_queue(netdev);
+
+	netxen_nic_down(port);
+
+	module_put(THIS_MODULE);
+	return 0;
+}
+
+static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
+{
+	struct netxen_port *port = netdev_priv(netdev);
+	unsigned int nr_frags = 0;
+	struct netxen_adapter *adapter = port->adapter;
+	struct netxen_hardware_context *hw = &adapter->ahw;
+	struct pci_dev *pdev;
+	unsigned int first_seg_len = skb->len - skb->data_len;
+	struct netxen_skb_frag *buffrag;
+	unsigned int i;
+
+	u32 producer = 0;
+	u32 saved_producer = 0;
+	struct cmd_desc_type0_t *hwdesc;
+	int k;
+	struct netxen_cmd_buffer *pbuf = NULL;
+	unsigned int tries = 0;
+	static int dropped_packet = 0;
+	struct netxen_skb_frag *frag;
+	int frag_count;
+	u32 local_producer = 0;
+	u32 max_tx_desc_count = 0;
+	u32 last_cmd_consumer = 0;
+	int no_of_desc;
+
+	port->stats.xmitcalled++;
+	nr_frags = skb_shinfo(skb)->nr_frags;
+	frag_count = 1 + nr_frags;
+
+	if (unlikely(skb->len <= 0)) {
+		dev_kfree_skb_any(skb);
+		port->stats.badskblen++;
+		return 0;
+	}
+
+	if (frag_count > MAX_BUFFERS_PER_CMD) {
+		printk
+		    ("%s: %s netxen_nic_xmit_frame: frag_count (%d) too large, "
+		     "can handle only %d frags\n", netxen_nic_driver_name,
+		     netdev->name, frag_count, MAX_BUFFERS_PER_CMD);
+		goto drop_packet;
+	}
+
+	/*
+	 * Everything is set up. Now, we just need to transmit it out.
+	 * Note that we have to copy the contents of buffer over to
+	 * right place. Later on, this can be optimized out by de-coupling the
+	 * producer index from the buffer index.
+	 */
+      retry_getting_window:
+	spin_lock_bh(&adapter->tx_lock);
+	if (adapter->total_threads == MAX_XMIT_PRODUCERS) {
+		spin_unlock_bh(&adapter->tx_lock);
+		/*
+		 * Yield CPU
+		 */
+		if (!in_atomic())
+			schedule();
+		else {
+			for (i = 0; i < 20; i++)
+				cpu_relax();	/*This a nop instr on i386 */
+		}
+		goto retry_getting_window;
+	}
+	local_producer = adapter->cmd_producer;
+	/* There 4 fragments per descriptor */
+	no_of_desc = (frag_count + 3) >> 2;
+	if (skb_shinfo(skb)->tso_size > 0) {
+		no_of_desc++;
+		if (((skb->nh.iph)->ihl * sizeof(u32)) +
+		    ((skb->h.th)->doff * sizeof(u32)) +
+		    sizeof(struct ethhdr) >
+		    (sizeof(struct cmd_desc_type0_t) - IP_ALIGNMENT_BYTES)) {
+			no_of_desc++;
+		}
+	}
+	k = adapter->cmd_producer;
+	max_tx_desc_count = adapter->max_tx_desc_count;
+	last_cmd_consumer = adapter->last_cmd_consumer;
+	if ((k + no_of_desc) >=
+	    ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
+	     last_cmd_consumer)) {
+		spin_unlock_bh(&adapter->tx_lock);
+		if (tries == 0) {
+			local_bh_disable();
+			netxen_process_cmd_ring((unsigned long)adapter);
+			local_bh_enable();
+			++tries;
+			goto retry_getting_window;
+		} else {
+			port->stats.nocmddescriptor++;
+			DPRINTK(ERR, "No command descriptors available,"
+				" producer = %d, consumer = %d count=%llu,"
+				" dropping packet\n", producer,
+				adapter->last_cmd_consumer,
+				port->stats.nocmddescriptor);
+			goto requeue_packet;
+		}
+	}
+	k = get_index_range(k, max_tx_desc_count, no_of_desc);
+	adapter->cmd_producer = k;
+	adapter->total_threads++;
+	adapter->num_threads++;
+
+	spin_unlock_bh(&adapter->tx_lock);
+	/* Copy the descriptors into the hardware    */
+	producer = local_producer;
+	saved_producer = producer;
+	hwdesc = &hw->cmd_desc_head[producer];
+	memset(hwdesc, 0, sizeof(struct cmd_desc_type0_t));
+	/* Take skb->data itself */
+	pbuf = &adapter->cmd_buf_arr[producer];
+	if (skb_shinfo(skb)->tso_size > 0) {
+		pbuf->mss = skb_shinfo(skb)->tso_size;
+		hwdesc->mss = skb_shinfo(skb)->tso_size;
+	} else {
+		pbuf->mss = 0;
+		hwdesc->mss = 0;
+	}
+	pbuf->no_of_descriptors = no_of_desc;
+	pbuf->total_length = skb->len;
+	pbuf->skb = skb;
+	pbuf->cmd = TX_ETHER_PKT;
+	pbuf->frag_count = frag_count;
+	pbuf->port = port->portnum;
+	buffrag = &pbuf->frag_array[0];
+	buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
+				      PCI_DMA_TODEVICE);
+	buffrag->length = first_seg_len;
+	hwdesc->total_length = skb->len;
+	hwdesc->num_of_buffers = frag_count;
+	hwdesc->opcode = TX_ETHER_PKT;
+
+	hwdesc->port = port->portnum;
+	hwdesc->buffer1_length = first_seg_len;
+	hwdesc->addr_buffer1 = buffrag->dma;
+
+	for (i = 1, k = 1; i < frag_count; i++, k++) {
+		struct skb_frag_struct *frag;
+		int len, temp_len;
+		unsigned long offset;
+		dma_addr_t temp_dma;
+
+		/* move to next desc. if there is a need */
+		if ((i & 0x3) == 0) {
+			k = 0;
+			producer = get_next_index(producer,
+						  adapter->max_tx_desc_count);
+			hwdesc = &hw->cmd_desc_head[producer];
+			memset(hwdesc, 0, sizeof(struct cmd_desc_type0_t));
+		}
+		frag = &skb_shinfo(skb)->frags[i - 1];
+		len = frag->size;
+		offset = frag->page_offset;
+
+		temp_len = len;
+		temp_dma = pci_map_page(port->pdev, frag->page, offset,
+					len, PCI_DMA_TODEVICE);
+
+		buffrag++;
+		buffrag->dma = temp_dma;
+		buffrag->length = temp_len;
+
+		DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
+		switch (k) {
+		case 0:
+			hwdesc->buffer1_length = temp_len;
+			hwdesc->addr_buffer1 = temp_dma;
+			break;
+		case 1:
+			hwdesc->buffer2_length = temp_len;
+			hwdesc->addr_buffer2 = temp_dma;
+			break;
+		case 2:
+			hwdesc->buffer3_length = temp_len;
+			hwdesc->addr_buffer3 = temp_dma;
+			break;
+		case 3:
+			hwdesc->buffer4_length = temp_len;
+			hwdesc->addr_buffer4 = temp_dma;
+			break;
+		}
+		frag++;
+	}
+	producer = get_next_index(producer, adapter->max_tx_desc_count);
+
+	/* might change opcode to TX_TCP_LSO */
+	netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
+
+	/* For LSO, we need to copy the MAC/IP/TCP headers into
+	 * the descriptor ring
+	 */
+	if (hw->cmd_desc_head[saved_producer].opcode == TX_TCP_LSO) {
+		int hdr_len, first_hdr_len, more_hdr;
+		hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
+		if (hdr_len >
+		    (sizeof(struct cmd_desc_type0_t) - IP_ALIGNMENT_BYTES)) {
+			first_hdr_len =
+			    sizeof(struct cmd_desc_type0_t) -
+			    IP_ALIGNMENT_BYTES;
+			more_hdr = 1;
+		} else {
+			first_hdr_len = hdr_len;
+			more_hdr = 0;
+		}
+		/* copy the MAC/IP/TCP headers to the cmd descriptor list */
+		hwdesc = &hw->cmd_desc_head[producer];
+
+		/* copy the first 64 bytes */
+		memcpy(((void *)hwdesc) + IP_ALIGNMENT_BYTES,
+		       (void *)(skb->data), first_hdr_len);
+		producer = get_next_index(producer, max_tx_desc_count);
+
+		if (more_hdr) {
+			hwdesc = &hw->cmd_desc_head[producer];
+			/* copy the next 64 bytes - should be enough except
+			 * for pathological case
+			 */
+			memcpy((void *)hwdesc, (void *)(skb->data) +
+			       first_hdr_len, hdr_len - first_hdr_len);
+			producer = get_next_index(producer, max_tx_desc_count);
+		}
+	}
+	spin_lock_bh(&adapter->tx_lock);
+	port->stats.txbytes += hw->cmd_desc_head[saved_producer].total_length;
+	/* Code to update the adapter considering how many producer threads
+	   are currently working */
+	if ((--adapter->num_threads) == 0) {
+		/* This is the last thread */
+		u32 crb_producer = adapter->cmd_producer;
+		hw->cmd_producer = adapter->cmd_producer;
+		read_lock(&adapter->adapter_lock);
+		writel(crb_producer,
+		       NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
+		read_unlock(&adapter->adapter_lock);
+
+		adapter->total_threads = 0;
+	} else {
+		u32 crb_producer = 0;
+		read_lock(&adapter->adapter_lock);
+		crb_producer =
+		    readl(NETXEN_CRB_NORMALIZE
+			  (adapter, CRB_CMD_PRODUCER_OFFSET));
+		read_unlock(&adapter->adapter_lock);
+
+		if (crb_producer == local_producer) {
+			crb_producer = get_index_range(crb_producer,
+						       max_tx_desc_count,
+						       no_of_desc);
+			read_lock(&adapter->adapter_lock);
+			writel(crb_producer,
+			       NETXEN_CRB_NORMALIZE(adapter,
+						    CRB_CMD_PRODUCER_OFFSET));
+			read_unlock(&adapter->adapter_lock);
+
+			hw->cmd_producer = crb_producer;
+		}
+	}
+
+	port->stats.xmitfinished++;
+	spin_unlock_bh(&adapter->tx_lock);
+
+	netdev->trans_start = jiffies;
+
+	DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
+
+	DPRINTK(INFO, "Done. Send\n");
+	goto netxen_nic_xmit_success;
+
+      requeue_packet:
+	spin_lock_bh(&adapter->tx_lock);
+	netif_stop_queue(netdev);
+	port->flags |= NETXEN_NETDEV_STATUS;
+	spin_unlock_bh(&adapter->tx_lock);
+	return NETDEV_TX_BUSY;
+
+      drop_packet:
+	pbuf = &adapter->cmd_buf_arr[producer];
+	frag = &pbuf->frag_array[0];
+	pdev = port->pdev;
+	pci_unmap_single(pdev, frag->dma, frag->length, PCI_DMA_TODEVICE);
+	for (i = 1; i < frag_count; i++) {
+		frag++;		/* Get the next frag */
+		pci_unmap_page(pdev, frag->dma, frag->length, PCI_DMA_TODEVICE);
+	}
+
+	port->stats.txdropped++;
+	dev_kfree_skb_any(pbuf->skb);
+	pbuf->skb = NULL;
+	if ((++dropped_packet & 0xff) == 0xff)
+		printk("%s: %s droppped packets = %d\n", netxen_nic_driver_name,
+		       netdev->name, dropped_packet);
+
+      netxen_nic_xmit_success:
+	return NETDEV_TX_OK;
+}
+
+static void netxen_watchdog(unsigned long v)
+{
+	struct netxen_adapter *adapter = (struct netxen_adapter *)v;
+	schedule_work(&adapter->watchdog_task);
+}
+
+static void netxen_tx_timeout(struct net_device *netdev)
+{
+	struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
+	struct netxen_adapter *adapter = port->adapter;
+
+	schedule_work(adapter->tx_timeout_task + port->portnum);
+}
+
+static void netxen_tx_timeout_task(struct net_device *netdev)
+{
+	struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
+	unsigned long flags;
+
+	printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
+	       netxen_nic_driver_name, netdev->name);
+
+	spin_lock_irqsave(&port->adapter->lock, flags);
+	netxen_nic_close(netdev);
+	netxen_nic_open(netdev);
+	spin_unlock_irqrestore(&port->adapter->lock, flags);
+	netdev->trans_start = jiffies;
+	netif_wake_queue(netdev);
+}
+
+static int
+netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
+{
+	u32 ret = 0;
+
+	DPRINTK(INFO, "Entered handle ISR\n");
+
+	adapter->stats.ints++;
+
+	if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
+		int count = 0;
+		u32 mask;
+		read_lock(&adapter->adapter_lock);
+		netxen_nic_disable_int(adapter);
+		/* Window = 0 or 1 */
+		do {
+			writel(0xffffffff, (void *)
+			       (adapter->ahw.pci_base + ISR_INT_TARGET_STATUS));
+			mask = readl((void *)
+				     (adapter->ahw.pci_base + ISR_INT_VECTOR));
+		} while (((mask & 0x80) != 0) && (++count < 32));
+		if ((mask & 0x80) != 0)
+			printk("Could not disable interrupt completely\n");
+
+		read_unlock(&adapter->adapter_lock);
+	}
+	adapter->stats.hostints++;
+
+	if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
+		if (netif_rx_schedule_prep(netdev)) {
+			/*
+			 * Interrupts are already disabled.
+			 */
+			__netif_rx_schedule(netdev);
+		} else {
+			static unsigned int intcount = 0;
+			if ((++intcount & 0xfff) == 0xfff)
+				printk(KERN_ERR
+				       "%s: %s interrupt %d while in poll\n",
+				       netxen_nic_driver_name, netdev->name,
+				       intcount);
+		}
+		ret = 1;
+	}
+
+	if (ret == 0) {
+		read_lock(&adapter->adapter_lock);
+		netxen_nic_enable_int(adapter);
+		read_unlock(&adapter->adapter_lock);
+	}
+
+	return ret;
+}
+
+/**
+ * netxen_intr - Interrupt Handler
+ * @irq: interrupt number
+ * data points to adapter stucture (which may be handling more than 1 port
+ **/
+irqreturn_t netxen_intr(int irq, void *data, struct pt_regs * regs)
+{
+	struct netxen_adapter *adapter;
+	struct netxen_port *port;
+	struct net_device *netdev;
+
+	if (unlikely(!irq)) {
+		return IRQ_NONE;	/* Not our interrupt */
+	}
+
+	adapter = (struct netxen_adapter *)data;
+	port = adapter->port[0];
+	netdev = port->netdev;
+
+	/* process our status queue (for all 4 ports) */
+	netxen_handle_int(adapter, netdev);
+
+	return IRQ_HANDLED;
+}
+
+static int netxen_nic_poll(struct net_device *netdev, int *budget)
+{
+	struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
+	struct netxen_adapter *adapter = port->adapter;
+	int work_to_do = min(*budget, netdev->quota);
+	int done = 1;
+	int ctx;
+	int this_work_done;
+
+	DPRINTK(INFO, "polling for %d descriptors\n", *budget);
+	port->stats.polled++;
+
+	adapter->work_done = 0;
+	for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
+		/*
+		 * Fairness issue. This will give undue weight to the
+		 * receive context 0.
+		 */
+
+		/*
+		 * To avoid starvation, we give each of our receivers,
+		 * a fraction of the quota. Sometimes, it might happen that we
+		 * have enough quota to process every packet, but since all the
+		 * packets are on one context, it gets only half of the quota,
+		 * and ends up not processing it.
+		 */
+		this_work_done = netxen_process_rcv_ring(adapter, ctx,
+							 work_to_do /
+							 MAX_RCV_CTX);
+		adapter->work_done += this_work_done;
+	}
+
+	netdev->quota -= adapter->work_done;
+	*budget -= adapter->work_done;
+
+	if (adapter->work_done >= work_to_do
+	    && netxen_nic_rx_has_work(adapter) != 0)
+		done = 0;
+
+	netxen_process_cmd_ring((unsigned long)adapter);
+
+	DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
+		adapter->work_done, work_to_do);
+	if (done) {
+		netif_rx_complete(netdev);
+		read_lock(&adapter->adapter_lock);
+		netxen_nic_enable_int(adapter);
+		read_unlock(&adapter->adapter_lock);
+	}
+
+	return (done ? 0 : 1);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void netxen_nic_poll_controller(struct net_device *netdev)
+{
+	struct netxen_port *port = netdev_priv(netdev);
+	struct netxen_adapter *adapter = port->adapter;
+	disable_irq(netdev->irq);
+	netxen_intr(netdev->irq, adapter, NULL);
+	enable_irq(netdev->irq);
+}
+#endif
+
+/*
+ * netxen_nic_ioctl ()    We provide the tcl/phanmon support through these
+ * ioctls.
+ */
+static int
+netxen_nic_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
+{
+	int err = 0;
+	struct netxen_port *port = netdev_priv(netdev);
+	struct netxen_adapter *adapter = port->adapter;
+
+	DPRINTK(INFO, "doing ioctl for %s\n", netdev->name);
+	switch (cmd) {
+	case NETXEN_NIC_CMD:
+		err = netxen_nic_do_ioctl(adapter, (void *)ifr->ifr_data, port);
+		break;
+
+	case NETXEN_NIC_NAME:
+		DPRINTK(INFO, "ioctl cmd for NetXen\n");
+		if (ifr->ifr_data) {
+			put_user(port->portnum, (u16 *) ifr->ifr_data);
+		}
+		break;
+
+	default:
+		DPRINTK(INFO, "ioctl cmd %x not supported\n", cmd);
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	return err;
+}
+
+static struct pci_driver netxen_driver = {
+	.name = netxen_nic_driver_name,
+	.id_table = netxen_pci_tbl,
+	.probe = netxen_nic_probe,
+	.remove = __devexit_p(netxen_nic_remove),
+	.suspend = netxen_nic_suspend,
+	.resume = netxen_nic_resume
+};
+
+/* Driver Registration on NetXen card    */
+
+static int __init netxen_init_module(void)
+{
+	printk(KERN_INFO "%s \n", netxen_nic_driver_string);
+
+	pci_module_init(&netxen_driver);
+
+	return netxen_nic_probe_err;
+}
+
+module_init(netxen_init_module);
+
+static void __exit netxen_exit_module(void)
+{
+	int i;
+	struct netxen_adapter *adapter;
+
+	for (i = 0; i < MAX_NUM_CARDS; i++) {
+		adapter = adapterlist[i];
+		if (adapter == NULL)
+			continue;
+		if (adapter->netlist != NULL
+		    && adapter->netlist->netdev != NULL) {
+			read_lock(&adapter->adapter_lock);
+			netxen_nic_disable_int(adapter);
+			read_unlock(&adapter->adapter_lock);
+			pinit_from_rom(adapter, 0);
+		}
+	}
+
+	/*
+	 * Wait for some time to allow the dma to drain, if any.
+	 */
+	mdelay(5);
+	pci_unregister_driver(&netxen_driver);
+}
+
+module_exit(netxen_exit_module);


^ permalink raw reply	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2006-05-26 16:08 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-05-25 10:57 [PATCH 8/9] Resending NetXen 1G/10G NIC driver patch Linsys Contractor Amit S. Kale
2006-05-25 16:44 ` Roland Dreier
2006-05-25 17:03 ` Stephen Hemminger
2006-05-26 14:26   ` Pradeep Dalvi
2006-05-26 16:08     ` Stephen Hemminger

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