| /* |
| * 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 <linux/vmalloc.h> |
| #include <linux/highmem.h> |
| #include "netxen_nic_hw.h" |
| |
| #include "netxen_nic.h" |
| #define DEFINE_GLOBAL_RECV_CRB |
| #include "netxen_nic_phan_reg.h" |
| #include "netxen_nic_ioctl.h" |
| |
| #include <linux/dma-mapping.h> |
| #include <linux/vmalloc.h> |
| |
| #define PHAN_VENDOR_ID 0x4040 |
| |
| 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-nic"; |
| static char netxen_nic_driver_string[] = "NetXen Network Driver version " |
| NETXEN_NIC_LINUX_VERSIONID; |
| |
| #define NETXEN_NETDEV_WEIGHT 120 |
| #define NETXEN_ADAPTER_UP_MAGIC 777 |
| #define NETXEN_NIC_PEG_TUNE 0 |
| |
| u8 nx_p2_id = NX_P2_C0; |
| |
| #define DMA_32BIT_MASK 0x00000000ffffffffULL |
| #define DMA_35BIT_MASK 0x00000007ffffffffULL |
| |
| /* 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 work_struct *work); |
| 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); |
| |
| /* PCI Device ID Table */ |
| static struct pci_device_id netxen_pci_tbl[] __devinitdata = { |
| {PCI_DEVICE(0x4040, 0x0001)}, |
| {PCI_DEVICE(0x4040, 0x0002)}, |
| {PCI_DEVICE(0x4040, 0x0003)}, |
| {PCI_DEVICE(0x4040, 0x0004)}, |
| {PCI_DEVICE(0x4040, 0x0005)}, |
| {PCI_DEVICE(0x4040, 0x0024)}, |
| {PCI_DEVICE(0x4040, 0x0025)}, |
| {0,} |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, netxen_pci_tbl); |
| |
| struct workqueue_struct *netxen_workq; |
| static void netxen_watchdog(unsigned long); |
| |
| /* |
| * netxen_nic_probe() |
| * |
| * The Linux system will invoke this after identifying the vendor ID and |
| * device Id in the pci_tbl supported by this module. |
| * |
| * A quad port card has one operational PCI config space, (function 0), |
| * which is used to access all four ports. |
| * |
| * This routine 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; |
| void __iomem *mem_ptr0 = NULL; |
| void __iomem *mem_ptr1 = NULL; |
| void __iomem *mem_ptr2 = NULL; |
| |
| u8 *db_ptr = NULL; |
| unsigned long mem_base, mem_len, db_base, db_len; |
| int pci_using_dac, i, err; |
| int ring; |
| struct netxen_recv_context *recv_ctx = NULL; |
| struct netxen_rcv_desc_ctx *rcv_desc = NULL; |
| struct netxen_cmd_buffer *cmd_buf_arr = NULL; |
| u64 mac_addr[FLASH_NUM_PORTS + 1]; |
| int valid_mac = 0; |
| |
| printk(KERN_INFO "%s \n", netxen_nic_driver_string); |
| /* In current scheme, we use only PCI function 0 */ |
| if (PCI_FUNC(pdev->devfn) != 0) { |
| DPRINTK(ERR, "NetXen function %d will not be enabled.\n", |
| PCI_FUNC(pdev->devfn)); |
| return -ENODEV; |
| } |
| if ((err = pci_enable_device(pdev))) |
| 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); |
| pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id); |
| if (nx_p2_id == NX_P2_C1 && |
| (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) && |
| (pci_set_consistent_dma_mask(pdev, DMA_35BIT_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_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE); |
| mem_ptr1 = |
| ioremap(mem_base + SECOND_PAGE_GROUP_START, SECOND_PAGE_GROUP_SIZE); |
| mem_ptr2 = |
| ioremap(mem_base + THIRD_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE); |
| |
| if ((mem_ptr0 == 0UL) || (mem_ptr1 == 0UL) || (mem_ptr2 == 0UL)) { |
| DPRINTK(ERR, |
| "Cannot remap adapter memory aborting.:" |
| "0 -> %p, 1 -> %p, 2 -> %p\n", |
| mem_ptr0, mem_ptr1, mem_ptr2); |
| |
| err = -EIO; |
| goto err_out_iounmap; |
| } |
| 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_iounmap; |
| } |
| DPRINTK(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_iounmap; |
| } |
| DPRINTK(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_dbunmap; |
| } |
| |
| 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; |
| adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS; |
| |
| pci_set_drvdata(pdev, adapter); |
| |
| cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE); |
| if (cmd_buf_arr == NULL) { |
| printk(KERN_ERR |
| "%s: Could not allocate cmd_buf_arr memory:%d\n", |
| netxen_nic_driver_name, (int)TX_RINGSIZE); |
| 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; |
| |
| case RCV_RING_LRO: |
| rcv_desc->max_rx_desc_count = |
| adapter->max_lro_rx_desc_count; |
| rcv_desc->flags = RCV_DESC_LRO; |
| rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN; |
| rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH; |
| break; |
| |
| } |
| rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *) |
| vmalloc(RCV_BUFFSIZE); |
| |
| if (rcv_desc->rx_buf_arr == NULL) { |
| printk(KERN_ERR "%s: Could not allocate" |
| "rcv_desc->rx_buf_arr memory:%d\n", |
| netxen_nic_driver_name, |
| (int)RCV_BUFFSIZE); |
| 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_base0 = mem_ptr0; |
| adapter->ahw.pci_base1 = mem_ptr1; |
| adapter->ahw.pci_base2 = mem_ptr2; |
| adapter->ahw.db_base = db_ptr; |
| adapter->ahw.db_len = db_len; |
| spin_lock_init(&adapter->tx_lock); |
| spin_lock_init(&adapter->lock); |
| netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */ |
| #ifdef CONFIG_IA64 |
| netxen_pinit_from_rom(adapter, 0); |
| udelay(500); |
| netxen_load_firmware(adapter); |
| #endif |
| |
| /* |
| * 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 before |
| * initializing the ports |
| */ |
| netxen_initialize_adapter_hw(adapter); /* initialize the adapter */ |
| |
| netxen_initialize_adapter_ops(adapter); |
| |
| 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, netxen_watchdog_task); |
| adapter->ahw.pdev = pdev; |
| adapter->proc_cmd_buf_counter = 0; |
| adapter->ahw.revision_id = nx_p2_id; |
| |
| 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 (netxen_is_flash_supported(adapter) == 0 && |
| netxen_get_flash_mac_addr(adapter, mac_addr) == 0) |
| valid_mac = 1; |
| else |
| valid_mac = 0; |
| |
| /* |
| * Initialize all the CRB registers here. |
| */ |
| 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)); |
| |
| /* do this before waking up pegs so that we have valid dummy dma addr */ |
| err = netxen_initialize_adapter_offload(adapter); |
| if (err) { |
| goto err_out_free_dev; |
| } |
| |
| /* Unlock the HW, prompting the boot sequence */ |
| writel(1, |
| NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE)); |
| |
| /* Handshake with the card before we register the devices. */ |
| netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE); |
| |
| /* initialize the all the ports */ |
| adapter->active_ports = 0; |
| |
| 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); |
| SET_NETDEV_DEV(netdev, &pdev->dev); |
| |
| port = netdev_priv(netdev); |
| port->netdev = netdev; |
| port->pdev = pdev; |
| port->adapter = adapter; |
| port->portnum = i; /* Gigabit port number from 0-3 */ |
| |
| 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; |
| netdev->watchdog_timeo = HZ; |
| |
| SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops); |
| 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; |
| |
| 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 { |
| if (adapter->macaddr_set) |
| adapter->macaddr_set(port, |
| netdev->dev_addr); |
| } |
| } |
| INIT_WORK(&port->tx_timeout_task, netxen_tx_timeout_task); |
| 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); |
| err = -EIO; |
| free_netdev(netdev); |
| goto err_out_free_dev; |
| } |
| adapter->port_count++; |
| adapter->port[i] = port; |
| } |
| |
| writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)); |
| netxen_pinit_from_rom(adapter, 0); |
| udelay(500); |
| netxen_load_firmware(adapter); |
| netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE); |
| /* |
| * delay a while to ensure that the Pegs are up & running. |
| * Otherwise, we might see some flaky behaviour. |
| */ |
| udelay(100); |
| |
| switch (adapter->ahw.board_type) { |
| case NETXEN_NIC_GBE: |
| printk("%s: QUAD GbE board initialized\n", |
| netxen_nic_driver_name); |
| break; |
| |
| case NETXEN_NIC_XGBE: |
| printk("%s: XGbE board initialized\n", netxen_nic_driver_name); |
| break; |
| } |
| |
| adapter->driver_mismatch = 0; |
| |
| return 0; |
| |
| err_out_free_dev: |
| if (adapter->flags & NETXEN_NIC_MSI_ENABLED) |
| pci_disable_msi(pdev); |
| for (i = 0; i < adapter->port_count; i++) { |
| port = adapter->port[i]; |
| if ((port) && (port->netdev)) { |
| unregister_netdev(port->netdev); |
| free_netdev(port->netdev); |
| } |
| } |
| |
| netxen_free_adapter_offload(adapter); |
| |
| 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) { |
| vfree(rcv_desc->rx_buf_arr); |
| rcv_desc->rx_buf_arr = NULL; |
| } |
| } |
| } |
| vfree(cmd_buf_arr); |
| |
| err_out_free_adapter: |
| pci_set_drvdata(pdev, NULL); |
| kfree(adapter); |
| |
| err_out_dbunmap: |
| if (db_ptr) |
| iounmap(db_ptr); |
| |
| err_out_iounmap: |
| if (mem_ptr0) |
| iounmap(mem_ptr0); |
| if (mem_ptr1) |
| iounmap(mem_ptr1); |
| if (mem_ptr2) |
| iounmap(mem_ptr2); |
| |
| err_out_free_res: |
| pci_release_regions(pdev); |
| err_out_disable_pdev: |
| pci_disable_device(pdev); |
| 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; |
| int i; |
| int ctxid, ring; |
| |
| adapter = pci_get_drvdata(pdev); |
| if (adapter == NULL) |
| return; |
| |
| netxen_nic_stop_all_ports(adapter); |
| /* leave the hw in the same state as reboot */ |
| netxen_pinit_from_rom(adapter, 0); |
| writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)); |
| netxen_load_firmware(adapter); |
| netxen_free_adapter_offload(adapter); |
| |
| udelay(500); /* Delay for a while to drain the DMA engines */ |
| for (i = 0; i < adapter->port_count; i++) { |
| port = adapter->port[i]; |
| if ((port) && (port->netdev)) { |
| unregister_netdev(port->netdev); |
| free_netdev(port->netdev); |
| } |
| } |
| |
| if ((adapter->flags & NETXEN_NIC_MSI_ENABLED)) |
| pci_disable_msi(pdev); |
| pci_set_drvdata(pdev, NULL); |
| if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) |
| netxen_free_hw_resources(adapter); |
| |
| iounmap(adapter->ahw.db_base); |
| iounmap(adapter->ahw.pci_base0); |
| iounmap(adapter->ahw.pci_base1); |
| iounmap(adapter->ahw.pci_base2); |
| |
| pci_release_regions(pdev); |
| pci_disable_device(pdev); |
| |
| for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) { |
| recv_ctx = &adapter->recv_ctx[ctxid]; |
| 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); |
| } |
| vfree(rcv_desc->rx_buf_arr); |
| } |
| } |
| |
| vfree(adapter->cmd_buf_arr); |
| 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 ctx, ring; |
| |
| if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) { |
| err = netxen_init_firmware(adapter); |
| if (err != 0) { |
| printk(KERN_ERR "Failed to init firmware\n"); |
| return -EIO; |
| } |
| netxen_nic_flash_print(adapter); |
| if (adapter->init_niu) |
| adapter->init_niu(adapter); |
| |
| /* 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); |
| return err; |
| } |
| if (adapter->init_port |
| && adapter->init_port(adapter, port->portnum) != 0) { |
| printk(KERN_ERR "%s: Failed to initialize port %d\n", |
| netxen_nic_driver_name, port->portnum); |
| netxen_free_hw_resources(adapter); |
| return -EIO; |
| } |
| for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) { |
| for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) |
| netxen_post_rx_buffers(adapter, ctx, ring); |
| } |
| adapter->irq = adapter->ahw.pdev->irq; |
| err = request_irq(adapter->ahw.pdev->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); |
| return err; |
| } |
| |
| adapter->is_up = NETXEN_ADAPTER_UP_MAGIC; |
| } |
| adapter->active_ports++; |
| if (adapter->active_ports == 1) { |
| if (!adapter->driver_mismatch) |
| mod_timer(&adapter->watchdog_timer, jiffies); |
| |
| netxen_nic_enable_int(adapter); |
| } |
| |
| /* Done here again so that even if phantom sw overwrote it, |
| * we set it */ |
| if (adapter->macaddr_set) |
| adapter->macaddr_set(port, netdev->dev_addr); |
| netxen_nic_set_link_parameters(port); |
| |
| netxen_nic_set_multi(netdev); |
| if (adapter->set_mtu) |
| adapter->set_mtu(port, netdev->mtu); |
| |
| 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); |
| struct netxen_adapter *adapter = port->adapter; |
| int i, j; |
| struct netxen_cmd_buffer *cmd_buff; |
| struct netxen_skb_frag *buffrag; |
| |
| netif_carrier_off(netdev); |
| netif_stop_queue(netdev); |
| |
| adapter->active_ports--; |
| |
| if (!adapter->active_ports) { |
| netxen_nic_disable_int(adapter); |
| if (adapter->irq) |
| free_irq(adapter->irq, adapter); |
| cmd_buff = adapter->cmd_buf_arr; |
| for (i = 0; i < adapter->max_tx_desc_count; i++) { |
| buffrag = cmd_buff->frag_array; |
| if (buffrag->dma) { |
| pci_unmap_single(port->pdev, buffrag->dma, |
| buffrag->length, |
| PCI_DMA_TODEVICE); |
| buffrag->dma = (u64) NULL; |
| } |
| for (j = 0; j < cmd_buff->frag_count; j++) { |
| buffrag++; |
| if (buffrag->dma) { |
| pci_unmap_page(port->pdev, |
| buffrag->dma, |
| buffrag->length, |
| PCI_DMA_TODEVICE); |
| buffrag->dma = (u64) NULL; |
| } |
| } |
| /* Free the skb we received in netxen_nic_xmit_frame */ |
| if (cmd_buff->skb) { |
| dev_kfree_skb_any(cmd_buff->skb); |
| cmd_buff->skb = NULL; |
| } |
| cmd_buff++; |
| } |
| FLUSH_SCHEDULED_WORK(); |
| del_timer_sync(&adapter->watchdog_timer); |
| } |
| |
| return 0; |
| } |
| |
| static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) |
| { |
| struct netxen_port *port = netdev_priv(netdev); |
| struct netxen_adapter *adapter = port->adapter; |
| struct netxen_hardware_context *hw = &adapter->ahw; |
| 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 *hwdesc; |
| int k; |
| struct netxen_cmd_buffer *pbuf = NULL; |
| static int dropped_packet = 0; |
| 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++; |
| frag_count = skb_shinfo(skb)->nr_frags + 1; |
| |
| if (unlikely(skb->len <= 0)) { |
| dev_kfree_skb_any(skb); |
| port->stats.badskblen++; |
| return NETDEV_TX_OK; |
| } |
| |
| 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); |
| port->stats.txdropped++; |
| if ((++dropped_packet & 0xff) == 0xff) |
| printk("%s: %s droppped packets = %d\n", |
| netxen_nic_driver_name, netdev->name, |
| dropped_packet); |
| |
| return NETDEV_TX_OK; |
| } |
| |
| /* |
| * 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 (netdev->features & NETIF_F_TSO) { |
| if (skb_shinfo(skb)->gso_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) - 2)) { |
| 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)) { |
| 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); |
| |
| netif_stop_queue(netdev); |
| port->flags |= NETXEN_NETDEV_STATUS; |
| spin_unlock_bh(&adapter->tx_lock); |
| return NETDEV_TX_BUSY; |
| } |
| 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)); |
| /* Take skb->data itself */ |
| pbuf = &adapter->cmd_buf_arr[producer]; |
| if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) { |
| pbuf->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); |
| hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); |
| } else { |
| pbuf->mss = 0; |
| hwdesc->mss = 0; |
| } |
| 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; |
| netxen_set_cmd_desc_totallength(hwdesc, skb->len); |
| netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count); |
| netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT); |
| |
| netxen_set_cmd_desc_port(hwdesc, port->portnum); |
| hwdesc->buffer1_length = cpu_to_le16(first_seg_len); |
| hwdesc->addr_buffer1 = cpu_to_le64(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)); |
| } |
| 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 = cpu_to_le16(temp_len); |
| hwdesc->addr_buffer1 = cpu_to_le64(temp_dma); |
| break; |
| case 1: |
| hwdesc->buffer2_length = cpu_to_le16(temp_len); |
| hwdesc->addr_buffer2 = cpu_to_le64(temp_dma); |
| break; |
| case 2: |
| hwdesc->buffer3_length = cpu_to_le16(temp_len); |
| hwdesc->addr_buffer3 = cpu_to_le64(temp_dma); |
| break; |
| case 3: |
| hwdesc->buffer4_length = temp_len; |
| hwdesc->addr_buffer4 = cpu_to_le64(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 (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer]) |
| == 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) - 2)) { |
| first_hdr_len = sizeof(struct cmd_desc_type0) - 2; |
| 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) + 2, |
| (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 += |
| netxen_get_cmd_desc_totallength(&hw->cmd_desc_head[saved_producer]); |
| /* 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; |
| writel(crb_producer, |
| NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET)); |
| wmb(); |
| adapter->total_threads = 0; |
| } |
| |
| 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"); |
| 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); |
| |
| SCHEDULE_WORK(&port->tx_timeout_task); |
| } |
| |
| static void netxen_tx_timeout_task(struct work_struct *work) |
| { |
| struct netxen_port *port = |
| container_of(work, struct netxen_port, tx_timeout_task); |
| struct net_device *netdev = port->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; |
| mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR)); |
| if ((mask & 0x80) == 0) { |
| /* not our interrupt */ |
| return ret; |
| } |
| netxen_nic_disable_int(adapter); |
| /* Window = 0 or 1 */ |
| do { |
| writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter, |
| ISR_INT_TARGET_STATUS)); |
| mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR)); |
| } while (((mask & 0x80) != 0) && (++count < 32)); |
| if ((mask & 0x80) != 0) |
| printk("Could not disable interrupt completely\n"); |
| |
| } |
| 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) { |
| netxen_nic_enable_int(adapter); |
| } |
| |
| 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 netxen_adapter *adapter; |
| struct netxen_port *port; |
| struct net_device *netdev; |
| int i; |
| |
| if (unlikely(!irq)) { |
| return IRQ_NONE; /* Not our interrupt */ |
| } |
| |
| adapter = (struct netxen_adapter *)data; |
| for (i = 0; i < adapter->ahw.max_ports; i++) { |
| port = adapter->port[i]; |
| netdev = port->netdev; |
| |
| /* process our status queue (for all 4 ports) */ |
| if (netif_running(netdev)) { |
| netxen_handle_int(adapter, netdev); |
| break; |
| } |
| } |
| |
| 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; |
| int work_done = 0; |
| |
| DPRINTK(INFO, "polling for %d descriptors\n", *budget); |
| port->stats.polled++; |
| |
| 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); |
| work_done += this_work_done; |
| } |
| |
| netdev->quota -= work_done; |
| *budget -= work_done; |
| |
| if (work_done >= work_to_do && netxen_nic_rx_has_work(adapter) != 0) |
| done = 0; |
| |
| if (netxen_process_cmd_ring((unsigned long)adapter) == 0) |
| done = 0; |
| |
| DPRINTK(INFO, "new work_done: %d work_to_do: %d\n", |
| work_done, work_to_do); |
| if (done) { |
| netif_rx_complete(netdev); |
| netxen_nic_enable_int(adapter); |
| } |
| |
| return !done; |
| } |
| |
| #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(adapter->irq); |
| netxen_intr(adapter->irq, adapter); |
| enable_irq(adapter->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; |
| unsigned long nr_bytes = 0; |
| struct netxen_port *port = netdev_priv(netdev); |
| struct netxen_adapter *adapter = port->adapter; |
| char dev_name[NETXEN_NIC_NAME_LEN]; |
| |
| 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) { |
| sprintf(dev_name, "%s-%d", NETXEN_NIC_NAME_RSP, |
| port->portnum); |
| nr_bytes = |
| copy_to_user((char __user *)ifr->ifr_data, dev_name, |
| NETXEN_NIC_NAME_LEN); |
| if (nr_bytes) |
| err = -EIO; |
| |
| } |
| 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) |
| }; |
| |
| /* Driver Registration on NetXen card */ |
| |
| static int __init netxen_init_module(void) |
| { |
| if ((netxen_workq = create_singlethread_workqueue("netxen")) == 0) |
| return -ENOMEM; |
| |
| return pci_module_init(&netxen_driver); |
| } |
| |
| module_init(netxen_init_module); |
| |
| static void __exit netxen_exit_module(void) |
| { |
| /* |
| * Wait for some time to allow the dma to drain, if any. |
| */ |
| destroy_workqueue(netxen_workq); |
| pci_unregister_driver(&netxen_driver); |
| } |
| |
| module_exit(netxen_exit_module); |