/* * 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 <linux/dma-mapping.h> #include <linux/vmalloc.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-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_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 __iomem *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) { 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->tx_timeout = netxen_tx_timeout; netdev->watchdog_timeo = HZ; netxen_nic_change_mtu(netdev, netdev->mtu); 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; if (adapter->irq) free_irq(adapter->irq, adapter); netxen_nic_stop_all_ports(adapter); /* leave the hw in the same state as reboot */ writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)); netxen_pinit_from_rom(adapter, 0); udelay(500); netxen_load_firmware(adapter); netxen_free_adapter_offload(adapter); mdelay(1000); /* 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); 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); pci_set_drvdata(pdev, NULL); 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, IRQF_SHARED | IRQF_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); 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 = 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 = cpu_to_le16(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 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_register_driver(&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. */ pci_unregister_driver(&netxen_driver); destroy_workqueue(netxen_workq); } module_exit(netxen_exit_module);