2006-06-07 Amit S. Kale <[EMAIL PROTECTED]>
* Add netxen driver main routines: module initialization, probe,
xmit, receive, interrupt handler
diff -Naru linux-2.6.16.20.orig/drivers/net/netxen/netxen_nic_main.c
linux-2.6.16.20/drivers/net/netxen/netxen_nic_main.c
--- linux-2.6.16.20.orig/drivers/net/netxen/netxen_nic_main.c 1969-12-31
16:00:00.000000000 -0800
+++ linux-2.6.16.20/drivers/net/netxen/netxen_nic_main.c 2006-06-06
06:58:11.000000000 -0700
@@ -0,0 +1,1228 @@
+/*
+ * 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:
+ * [EMAIL PROTECTED]
+ * 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;
+ u8 *db_ptr = NULL;
+ unsigned long mem_base, mem_len, db_base, db_len;
+ int pci_using_dac, i, err;
+ int boardno = 0;
+ int ring;
+ struct netxen_recv_context *recv_ctx = NULL;
+ struct netxen_rcv_desc_ctx *rcv_desc = NULL;
+ struct netxen_cmd_buffer *cmd_buf_arr[MAX_RING_CTX] = { NULL };
+ struct netxen_ring_context *ctx;
+ 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;
+ }
+ db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
+ db_len = pci_resource_len(pdev, 4);
+
+ if (db_len == 0) {
+ printk(KERN_ERR "%s: doorbell is disabled\n",
+ netxen_nic_driver_name);
+ err = -EIO;
+ goto err_out_free_res;
+ }
+
+ DPRINTK(1, INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
+ db_len);
+
+ db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
+ if (db_ptr == 0UL) {
+ printk(KERN_ERR "%s: Failed to allocate doorbell map.",
+ netxen_nic_driver_name);
+ err = -EIO;
+ goto err_out_free_res;
+ }
+ DPRINTK(1, INFO, "doorbell ioremaped at %p\n", db_ptr);
+
+/*
+ * 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;
+ }
+
+ netxen_check_options(adapter);
+ for (i = 0; i < MAX_RING_CTX; i++) {
+ cmd_buf_arr[i] =
+ (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE(i));
+ if (cmd_buf_arr[i] == NULL) {
+ printk(KERN_ERR "%s: Failed to allocate memory for the"
+ "device block.Check system memory resource "
+ "usage.\n", netxen_nic_driver_name);
+ err = -ENOMEM;
+ goto err_out_free_adapter;
+ }
+ memset(cmd_buf_arr[i], 0, TX_RINGSIZE(i));
+ }
+
+ for (i = 0; i < MAX_RING_CTX; ++i) {
+ ctx = &adapter->ring_ctx[i];
+ recv_ctx = &ctx->recv_ctx;
+ 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 =
+ ctx->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 =
+ ctx->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);
+ }
+
+ }
+
+ for (i = 0; i < MAX_RING_CTX; ++i) {
+ ctx = &adapter->ring_ctx[i];
+ ctx->cmd_buf_arr = cmd_buf_arr[i];
+ }
+ 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;
+ adapter->ahw.db_base = (unsigned long)db_ptr;
+ adapter->ahw.db_len = db_len;
+ 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;
+ for (i = 0; i < MAX_RING_CTX; i++) {
+ adapter->ring_ctx[i].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 (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);
+ } else
+ adapter->flags |= NETXEN_NIC_MSI_ENABLED;
+
+ 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++) {
+ netdev = alloc_etherdev(sizeof(struct netxen_port));
+ if (netdev) {
+ printk(KERN_ERR "%s: could not allocate netdev for port"
+ " %d\n", netxen_nic_driver_name, i + 1);
+ goto err_out_free_dev;
+ }
+
+ SET_MODULE_OWNER(netdev);
+
+ port = netdev_priv(netdev);
+ port->netdev = netdev;
+ port->pdev = pdev;
+ 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];
+ netdev->dev_addr[0] = *(p + 5);
+ netdev->dev_addr[1] = *(p + 4);
+ netdev->dev_addr[2] = *(p + 3);
+ netdev->dev_addr[3] = *(p + 2);
+ netdev->dev_addr[4] = *(p + 1);
+ netdev->dev_addr[5] = *(p + 0);
+
+ memcpy(netdev->perm_addr, netdev->dev_addr,
+ netdev->addr_len);
+ if (!is_valid_ether_addr(netdev->perm_addr)) {
+ printk(KERN_ERR "%s: Bad MAC address "
+ "%02x:%02x:%02x:%02x:%02x:%02x.\n",
+ netxen_nic_driver_name,
+ netdev->dev_addr[0],
+ netdev->dev_addr[1],
+ netdev->dev_addr[2],
+ netdev->dev_addr[3],
+ netdev->dev_addr[4],
+ netdev->dev_addr[5]);
+ } else {
+ netxen_nic_macaddr_set(port, netdev->dev_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;
+ pci_set_drvdata(pdev, port);
+ }
+
+ /*
+ * 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;
+ }
+
+ 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 (port = pci_get_drvdata(pdev); port != NULL;) {
+ unregister_netdev(port->netdev);
+ free_netdev(port->netdev);
+ if (port->portnum <= 0)
+ break;
+ port = adapter->port[port->portnum - 1];
+ }
+ pci_set_drvdata(pdev, NULL);
+
+ err_out_free_rx_buffer:
+ for (i = 0; i < MAX_RING_CTX; ++i) {
+ ctx = &adapter->ring_ctx[i];
+ recv_ctx = &ctx->recv_ctx;
+ 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:
+ for (i = 0; i < MAX_RING_CTX; i++) {
+ if (cmd_buf_arr[i] != NULL)
+ vfree(cmd_buf_arr[i]);
+ }
+
+ 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 netxen_port *port;
+ struct netxen_rx_buffer *buffer;
+ struct netxen_recv_context *recv_ctx;
+ struct netxen_rcv_desc_ctx *rcv_desc;
+ struct netxen_ring_context *ctx;
+ int i;
+ int ctxid, ring;
+
+ port = pci_get_drvdata(pdev);
+ if (port == NULL || port->netdev == NULL)
+ return;
+ adapter = ((struct netxen_port *)(netdev_priv(port->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 */
+
+ port = pci_get_drvdata(pdev);
+ if (adapter->irq)
+ free_irq(adapter->irq, adapter);
+ if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
+ pci_disable_msi(pdev);
+ while (port != NULL) {
+ unregister_netdev(port->netdev);
+ free_netdev(port->netdev);
+ if (port->portnum <= 0)
+ break;
+ port = adapter->port[port->portnum - 1];
+ }
+ 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 (ctxid = 0; ctxid < MAX_RING_CTX; ++ctxid) {
+ ctx = &adapter->ring_ctx[ctxid];
+ recv_ctx = &ctx->recv_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);
+ }
+ pci_free_consistent(pdev, RCV_BUFFSIZE,
+ rcv_desc->rx_buf_arr,
+ rcv_desc->rx_buf_phys);
+ }
+ vfree(ctx->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;
+ int err = 0;
+ int ctxid, 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 (ctxid = 0; ctxid < MAX_RING_CTX; ++ctxid) {
+ for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
+ netxen_post_rx_buffers(adapter, ctxid, 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, netdev->dev_addr);
+ netxen_nic_set_link_parameters(port);
+
+ netxen_nic_set_multi(netdev);
+ if (!adapter->driver_mismatch)
+ netif_start_queue(netdev);
+
+ 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 pci_dev *pdev;
+ unsigned int first_seg_len = skb->len - skb->data_len;
+ struct netxen_skb_frag *buffrag;
+ unsigned int i;
+ int ctxid = 0;
+ 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;
+ struct netxen_ring_context *ctx = &adapter->ring_ctx[0];
+ struct netxen_hardware_ring_context *hw_ring_ctx = &(ctx->hw_ring_ctx);
+ 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 = ctx->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) - NET_IP_ALIGN)) {
+ no_of_desc++;
+ }
+ }
+ k = ctx->cmd_producer;
+ max_tx_desc_count = ctx->max_tx_desc_count;
+ last_cmd_consumer = ctx->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();
+ for (ctxid = 0; ctxid < MAX_RING_CTX; ++ctxid) {
+ netxen_process_cmd_ring((unsigned long)adapter,
+ ctxid);
+ }
+ 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,
+ ctx->last_cmd_consumer,
+ port->stats.nocmddescriptor);
+ goto requeue_packet;
+ }
+ }
+ k = get_index_range(k, max_tx_desc_count, no_of_desc);
+ ctx->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 = &ctx->hw_ring_ctx.cmd_desc_head[producer];
+ memset(hwdesc, 0, sizeof(struct cmd_desc_type0_t));
+ /* Take skb->data itself */
+ pbuf = &ctx->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,
+ ctx->max_tx_desc_count);
+ hwdesc = &ctx->hw_ring_ctx.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, ctx->max_tx_desc_count);
+
+ /* might change opcode to TX_TCP_LSO */
+ netxen_tso_check(adapter, &hw_ring_ctx->cmd_desc_head[saved_producer],
+ skb);
+
+ /* For LSO, we need to copy the MAC/IP/TCP headers into
+ * the descriptor ring
+ */
+ if (hw_ring_ctx->cmd_desc_head[saved_producer].opcode == TX_TCP_LSO) {
+ int hdr_len, first_hdr_len, more_hdr;
+ hdr_len =
+ hw_ring_ctx->cmd_desc_head[saved_producer].total_hdr_length;
+ if (hdr_len > (sizeof(struct cmd_desc_type0_t) - NET_IP_ALIGN))
{
+ first_hdr_len =
+ sizeof(struct cmd_desc_type0_t) - NET_IP_ALIGN;
+ 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_ring_ctx->cmd_desc_head[producer];
+
+ /* copy the first 64 bytes */
+ memcpy(((void *)hwdesc) + NET_IP_ALIGN,
+ (void *)(skb->data), first_hdr_len);
+ producer = get_next_index(producer, max_tx_desc_count);
+
+ if (more_hdr) {
+ hwdesc = &hw_ring_ctx->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_ring_ctx->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 = ctx->cmd_producer;
+ struct ctx_msg msg = { 0 };
+ hw_ring_ctx->cmd_producer = ctx->cmd_producer;
+ msg.PegId = NETXEN_XMIT_PEG_DB_ID;
+ msg.Count = crb_producer;
+ msg.CtxId = 0;
+ msg.Opcode = NETXEN_CMD_PRODUCER;
+ read_lock(&adapter->adapter_lock);
+ writel(*(u32 *) & msg,
+ DB_NORMALIZE(adapter, NETXEN_CMD_PRODUCER_OFFSET(0)));
+ read_unlock(&adapter->adapter_lock);
+
+ adapter->total_threads = 0;
+ } else {
+ u32 crb_producer = 0;
+ struct ctx_msg msg = { 0 };
+ read_lock(&adapter->adapter_lock);
+ *(u32 *) & msg =
+ readl(DB_NORMALIZE(adapter, NETXEN_CMD_PRODUCER_OFFSET(0)));
+ read_unlock(&adapter->adapter_lock);
+ crb_producer = msg.Count;
+
+ if (crb_producer == local_producer) {
+ crb_producer = get_index_range(crb_producer,
+ max_tx_desc_count,
+ no_of_desc);
+ msg.PegId = NETXEN_XMIT_PEG_DB_ID;
+ msg.Count = crb_producer;
+ msg.CtxId = 0;
+ msg.Opcode = NETXEN_CMD_PRODUCER;
+ read_lock(&adapter->adapter_lock);
+ writel(*(u32 *) & msg,
+ DB_NORMALIZE(adapter,
+ NETXEN_CMD_PRODUCER_OFFSET(0)));
+ read_unlock(&adapter->adapter_lock);
+
+ hw_ring_ctx->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 = &ctx->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 ctxid;
+ int this_work_done;
+
+ DPRINTK(INFO, "polling for %d descriptors\n", *budget);
+ port->stats.polled++;
+
+ adapter->work_done = 0;
+ for (ctxid = 0; ctxid < MAX_RING_CTX; ++ctxid) {
+ /*
+ * 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, ctxid,
+ work_to_do /
+ MAX_RING_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;
+
+ for (ctxid = 0; ctxid < MAX_RING_CTX; ++ctxid) {
+ netxen_process_cmd_ring((unsigned long)adapter, ctxid);
+ }
+
+ 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);
+
+ netxen_check_cmdline_params();
+ 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->port != NULL && adapter->port[0]->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);
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