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linux/drivers/net/netxen/netxen_nic_main.c
Linsys Contractor Mithlesh Thukral e0e20a1a08 NetXen: Fix second rmmod failure observed on PowerPC machines. 
Signed-off by: Mithlesh Thukral <mithlesh@netxen.com>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-03-02 20:02:28 -05:00

1162 lines
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/*
* 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);
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