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2956640d4a
linux/drivers/net/netxen/netxen_nic_main.c
Dhananjay Phadke 2956640d4a netxen: pci probe and firmware init changes 
Add initialization code in pci probe for new chip and retain
compatibility with old revisions.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-07-22 17:51:53 -04:00

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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"
#include "netxen_nic_phan_reg.h"
#include <linux/dma-mapping.h>
#include <net/ip.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;
static int port_mode = NETXEN_PORT_MODE_AUTO_NEG;
/* Default to restricted 1G auto-neg mode */
static int wol_port_mode = 5;
static int use_msi = 1;
static int use_msi_x = 1;
#define NETXEN_NETDEV_WEIGHT 120
#define NETXEN_ADAPTER_UP_MAGIC 777
#define NETXEN_NIC_PEG_TUNE 0
/* Local functions to NetXen NIC driver */
static int __devinit netxen_nic_probe(struct pci_dev *pdev,
const struct pci_device_id *ent);
static void __devexit netxen_nic_remove(struct pci_dev *pdev);
static int netxen_nic_open(struct net_device *netdev);
static int netxen_nic_close(struct net_device *netdev);
static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
static void netxen_tx_timeout(struct net_device *netdev);
static void netxen_tx_timeout_task(struct work_struct *work);
static void netxen_watchdog(unsigned long);
static int netxen_nic_poll(struct napi_struct *napi, 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);
static irqreturn_t netxen_msi_intr(int irq, void *data);
/* PCI Device ID Table */
#define ENTRY(device) \
{PCI_DEVICE(0x4040, (device)), \
.class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}
static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
ENTRY(0x0001),
ENTRY(0x0002),
ENTRY(0x0003),
ENTRY(0x0004),
ENTRY(0x0005),
ENTRY(0x0024),
ENTRY(0x0025),
ENTRY(0x0100),
{0,}
};
MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
/*
* In netxen_nic_down(), we must wait for any pending callback requests into
* netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
* reenabled right after it is deleted in netxen_nic_down().
* FLUSH_SCHEDULED_WORK() does this synchronization.
*
* Normally, schedule_work()/flush_scheduled_work() could have worked, but
* netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
* call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
* subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
* linkwatch_event() to be executed which also attempts to acquire the rtnl
* lock thus causing a deadlock.
*/
static struct workqueue_struct *netxen_workq;
#define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
#define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
static void netxen_watchdog(unsigned long);
static uint32_t crb_cmd_producer[4] = {
CRB_CMD_PRODUCER_OFFSET, CRB_CMD_PRODUCER_OFFSET_1,
CRB_CMD_PRODUCER_OFFSET_2, CRB_CMD_PRODUCER_OFFSET_3
};
static inline void
netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
uint32_t crb_producer)
{
adapter->pci_write_normalize(adapter,
adapter->crb_addr_cmd_producer, crb_producer);
}
static uint32_t crb_cmd_consumer[4] = {
CRB_CMD_CONSUMER_OFFSET, CRB_CMD_CONSUMER_OFFSET_1,
CRB_CMD_CONSUMER_OFFSET_2, CRB_CMD_CONSUMER_OFFSET_3
};
static inline void
netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
u32 crb_consumer)
{
adapter->pci_write_normalize(adapter,
adapter->crb_addr_cmd_consumer, crb_consumer);
}
static uint32_t msi_tgt_status[8] = {
ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3,
ISR_INT_TARGET_STATUS_F4, ISR_INT_TARGET_STATUS_F5,
ISR_INT_TARGET_STATUS_F6, ISR_INT_TARGET_STATUS_F7
};
static uint32_t sw_int_mask[4] = {
CRB_SW_INT_MASK_0, CRB_SW_INT_MASK_1,
CRB_SW_INT_MASK_2, CRB_SW_INT_MASK_3
};
static struct netxen_legacy_intr_set legacy_intr[] = NX_LEGACY_INTR_CONFIG;
static void netxen_nic_disable_int(struct netxen_adapter *adapter)
{
u32 mask = 0x7ff;
int retries = 32;
int port = adapter->portnum;
int pci_fn = adapter->ahw.pci_func;
if (adapter->msi_mode != MSI_MODE_MULTIFUNC)
adapter->pci_write_normalize(adapter, sw_int_mask[port], 0);
if (adapter->intr_scheme != -1 &&
adapter->intr_scheme != INTR_SCHEME_PERPORT)
adapter->pci_write_immediate(adapter, ISR_INT_MASK, mask);
if (!NETXEN_IS_MSI_FAMILY(adapter)) {
do {
adapter->pci_write_immediate(adapter,
ISR_INT_TARGET_STATUS, 0xffffffff);
mask = adapter->pci_read_immediate(adapter,
ISR_INT_VECTOR);
if (!(mask & 0x80))
break;
udelay(10);
} while (--retries);
if (!retries) {
printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
netxen_nic_driver_name);
}
} else {
if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
adapter->pci_write_immediate(adapter,
msi_tgt_status[pci_fn], 0xffffffff);
}
}
}
static void netxen_nic_enable_int(struct netxen_adapter *adapter)
{
u32 mask;
int port = adapter->portnum;
DPRINTK(1, INFO, "Entered ISR Enable \n");
if (adapter->intr_scheme != -1 &&
adapter->intr_scheme != INTR_SCHEME_PERPORT) {
switch (adapter->ahw.board_type) {
case NETXEN_NIC_GBE:
mask = 0x77b;
break;
case NETXEN_NIC_XGBE:
mask = 0x77f;
break;
default:
mask = 0x7ff;
break;
}
adapter->pci_write_immediate(adapter, ISR_INT_MASK, mask);
}
adapter->pci_write_normalize(adapter, sw_int_mask[port], 0x1);
if (!NETXEN_IS_MSI_FAMILY(adapter)) {
mask = 0xbff;
if (adapter->intr_scheme != -1 &&
adapter->intr_scheme != INTR_SCHEME_PERPORT) {
adapter->pci_write_normalize(adapter,
CRB_INT_VECTOR, 0);
}
adapter->pci_write_immediate(adapter,
ISR_INT_TARGET_MASK, mask);
}
DPRINTK(1, INFO, "Done with enable Int\n");
}
static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
{
struct pci_dev *pdev = adapter->pdev;
int err;
uint64_t mask;
#ifdef CONFIG_IA64
adapter->dma_mask = DMA_32BIT_MASK;
#else
if (revision_id >= NX_P3_B0) {
/* should go to DMA_64BIT_MASK */
adapter->dma_mask = DMA_39BIT_MASK;
mask = DMA_39BIT_MASK;
} else if (revision_id == NX_P3_A2) {
adapter->dma_mask = DMA_39BIT_MASK;
mask = DMA_39BIT_MASK;
} else if (revision_id == NX_P2_C1) {
adapter->dma_mask = DMA_35BIT_MASK;
mask = DMA_35BIT_MASK;
} else {
adapter->dma_mask = DMA_32BIT_MASK;
mask = DMA_32BIT_MASK;
goto set_32_bit_mask;
}
/*
* Consistent DMA mask is set to 32 bit because it cannot be set to
* 35 bits. For P3 also leave it at 32 bits for now. Only the rings
* come off this pool.
*/
if (pci_set_dma_mask(pdev, mask) == 0 &&
pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) == 0) {
adapter->pci_using_dac = 1;
return 0;
}
#endif /* CONFIG_IA64 */
set_32_bit_mask:
err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (!err)
err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
if (err) {
DPRINTK(ERR, "No usable DMA configuration, aborting:%d\n", err);
return err;
}
adapter->pci_using_dac = 0;
return 0;
}
static void netxen_check_options(struct netxen_adapter *adapter)
{
switch (adapter->ahw.boardcfg.board_type) {
case NETXEN_BRDTYPE_P3_HMEZ:
case NETXEN_BRDTYPE_P3_XG_LOM:
case NETXEN_BRDTYPE_P3_10G_CX4:
case NETXEN_BRDTYPE_P3_10G_CX4_LP:
case NETXEN_BRDTYPE_P3_IMEZ:
case NETXEN_BRDTYPE_P3_10G_SFP_PLUS:
case NETXEN_BRDTYPE_P3_10G_XFP:
case NETXEN_BRDTYPE_P3_10000_BASE_T:
adapter->msix_supported = !!use_msi_x;
adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
break;
case NETXEN_BRDTYPE_P2_SB31_10G:
case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
adapter->msix_supported = 0;
adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
break;
case NETXEN_BRDTYPE_P3_REF_QG:
case NETXEN_BRDTYPE_P3_4_GB:
case NETXEN_BRDTYPE_P3_4_GB_MM:
case NETXEN_BRDTYPE_P2_SB35_4G:
case NETXEN_BRDTYPE_P2_SB31_2G:
adapter->msix_supported = 0;
adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
break;
default:
adapter->msix_supported = 0;
adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
printk(KERN_WARNING "Unknown board type(0x%x)\n",
adapter->ahw.boardcfg.board_type);
break;
}
adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
adapter->max_possible_rss_rings = 1;
return;
}
static int
netxen_check_hw_init(struct netxen_adapter *adapter, int first_boot)
{
int ret = 0;
if (first_boot == 0x55555555) {
/* This is the first boot after power up */
/* PCI bus master workaround */
adapter->hw_read_wx(adapter,
NETXEN_PCIE_REG(0x4), &first_boot, 4);
if (!(first_boot & 0x4)) {
first_boot |= 0x4;
adapter->hw_write_wx(adapter,
NETXEN_PCIE_REG(0x4), &first_boot, 4);
adapter->hw_read_wx(adapter,
NETXEN_PCIE_REG(0x4), &first_boot, 4);
}
/* This is the first boot after power up */
adapter->hw_read_wx(adapter,
NETXEN_ROMUSB_GLB_SW_RESET, &first_boot, 4);
if (first_boot != 0x80000f) {
/* clear the register for future unloads/loads */
adapter->pci_write_normalize(adapter,
NETXEN_CAM_RAM(0x1fc), 0);
ret = -1;
}
if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
/* Start P2 boot loader */
adapter->pci_write_normalize(adapter,
NETXEN_CAM_RAM(0x1fc), NETXEN_BDINFO_MAGIC);
adapter->pci_write_normalize(adapter,
NETXEN_ROMUSB_GLB_PEGTUNE_DONE, 1);
}
}
return ret;
}
static void netxen_set_port_mode(struct netxen_adapter *adapter)
{
u32 val, data;
val = adapter->ahw.boardcfg.board_type;
if ((val == NETXEN_BRDTYPE_P3_HMEZ) ||
(val == NETXEN_BRDTYPE_P3_XG_LOM)) {
if (port_mode == NETXEN_PORT_MODE_802_3_AP) {
data = NETXEN_PORT_MODE_802_3_AP;
adapter->hw_write_wx(adapter,
NETXEN_PORT_MODE_ADDR, &data, 4);
} else if (port_mode == NETXEN_PORT_MODE_XG) {
data = NETXEN_PORT_MODE_XG;
adapter->hw_write_wx(adapter,
NETXEN_PORT_MODE_ADDR, &data, 4);
} else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_1G) {
data = NETXEN_PORT_MODE_AUTO_NEG_1G;
adapter->hw_write_wx(adapter,
NETXEN_PORT_MODE_ADDR, &data, 4);
} else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_XG) {
data = NETXEN_PORT_MODE_AUTO_NEG_XG;
adapter->hw_write_wx(adapter,
NETXEN_PORT_MODE_ADDR, &data, 4);
} else {
data = NETXEN_PORT_MODE_AUTO_NEG;
adapter->hw_write_wx(adapter,
NETXEN_PORT_MODE_ADDR, &data, 4);
}
if ((wol_port_mode != NETXEN_PORT_MODE_802_3_AP) &&
(wol_port_mode != NETXEN_PORT_MODE_XG) &&
(wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_1G) &&
(wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_XG)) {
wol_port_mode = NETXEN_PORT_MODE_AUTO_NEG;
}
adapter->hw_write_wx(adapter, NETXEN_WOL_PORT_MODE,
&wol_port_mode, 4);
}
}
#define PCI_CAP_ID_GEN 0x10
static void netxen_pcie_strap_init(struct netxen_adapter *adapter)
{
u32 pdevfuncsave;
u32 c8c9value = 0;
u32 chicken = 0;
u32 control = 0;
int i, pos;
struct pci_dev *pdev;
pdev = pci_get_device(0x1166, 0x0140, NULL);
if (pdev) {
pci_dev_put(pdev);
adapter->hw_read_wx(adapter,
NETXEN_PCIE_REG(PCIE_TGT_SPLIT_CHICKEN), &chicken, 4);
chicken |= 0x4000;
adapter->hw_write_wx(adapter,
NETXEN_PCIE_REG(PCIE_TGT_SPLIT_CHICKEN), &chicken, 4);
}
pdev = adapter->pdev;
adapter->hw_read_wx(adapter,
NETXEN_PCIE_REG(PCIE_CHICKEN3), &chicken, 4);
/* clear chicken3.25:24 */
chicken &= 0xFCFFFFFF;
/*
* if gen1 and B0, set F1020 - if gen 2, do nothing
* if gen2 set to F1000
*/
pos = pci_find_capability(pdev, PCI_CAP_ID_GEN);
if (pos == 0xC0) {
pci_read_config_dword(pdev, pos + 0x10, &control);
if ((control & 0x000F0000) != 0x00020000) {
/* set chicken3.24 if gen1 */
chicken |= 0x01000000;
}
printk(KERN_INFO "%s Gen2 strapping detected\n",
netxen_nic_driver_name);
c8c9value = 0xF1000;
} else {
/* set chicken3.24 if gen1 */
chicken |= 0x01000000;
printk(KERN_INFO "%s Gen1 strapping detected\n",
netxen_nic_driver_name);
if (adapter->ahw.revision_id == NX_P3_B0)
c8c9value = 0xF1020;
else
c8c9value = 0;
}
adapter->hw_write_wx(adapter,
NETXEN_PCIE_REG(PCIE_CHICKEN3), &chicken, 4);
if (!c8c9value)
return;
pdevfuncsave = pdev->devfn;
if (pdevfuncsave & 0x07)
return;
for (i = 0; i < 8; i++) {
pci_read_config_dword(pdev, pos + 8, &control);
pci_read_config_dword(pdev, pos + 8, &control);
pci_write_config_dword(pdev, pos + 8, c8c9value);
pdev->devfn++;
}
pdev->devfn = pdevfuncsave;
}
static void netxen_set_msix_bit(struct pci_dev *pdev, int enable)
{
u32 control;
int pos;
pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
if (pos) {
pci_read_config_dword(pdev, pos, &control);
if (enable)
control |= PCI_MSIX_FLAGS_ENABLE;
else
control = 0;
pci_write_config_dword(pdev, pos, control);
}
}
static void netxen_init_msix_entries(struct netxen_adapter *adapter)
{
int i;
for (i = 0; i < MSIX_ENTRIES_PER_ADAPTER; i++)
adapter->msix_entries[i].entry = i;
}
/*
* 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;
void __iomem *mem_ptr0 = NULL;
void __iomem *mem_ptr1 = NULL;
void __iomem *mem_ptr2 = NULL;
unsigned long first_page_group_end;
unsigned long first_page_group_start;
u8 __iomem *db_ptr = NULL;
unsigned long mem_base, mem_len, db_base, db_len, pci_len0 = 0;
int i = 0, err;
int first_driver, first_boot;
__le64 mac_addr[FLASH_NUM_PORTS + 1];
u32 val;
int pci_func_id = PCI_FUNC(pdev->devfn);
DECLARE_MAC_BUF(mac);
struct netxen_legacy_intr_set *legacy_intrp;
uint8_t revision_id;
if (pci_func_id == 0)
printk(KERN_INFO "%s\n", netxen_nic_driver_string);
if (pdev->class != 0x020000) {
printk(KERN_DEBUG "NetXen function %d, class %x will not "
"be enabled.\n",pci_func_id, pdev->class);
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);
netdev = alloc_etherdev(sizeof(struct netxen_adapter));
if(!netdev) {
printk(KERN_ERR"%s: Failed to allocate memory for the "
"device block.Check system memory resource"
" usage.\n", netxen_nic_driver_name);
goto err_out_free_res;
}
SET_NETDEV_DEV(netdev, &pdev->dev);
adapter = netdev->priv;
adapter->netdev = netdev;
adapter->pdev = pdev;
adapter->ahw.pci_func = pci_func_id;
revision_id = pdev->revision;
adapter->ahw.revision_id = revision_id;
err = nx_set_dma_mask(adapter, revision_id);
if (err)
goto err_out_free_netdev;
rwlock_init(&adapter->adapter_lock);
adapter->ahw.qdr_sn_window = -1;
adapter->ahw.ddr_mn_window = -1;
/* remap phys address */
mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
mem_len = pci_resource_len(pdev, 0);
pci_len0 = 0;
adapter->hw_write_wx = netxen_nic_hw_write_wx_128M;
adapter->hw_read_wx = netxen_nic_hw_read_wx_128M;
adapter->pci_read_immediate = netxen_nic_pci_read_immediate_128M;
adapter->pci_write_immediate = netxen_nic_pci_write_immediate_128M;
adapter->pci_read_normalize = netxen_nic_pci_read_normalize_128M;
adapter->pci_write_normalize = netxen_nic_pci_write_normalize_128M;
adapter->pci_set_window = netxen_nic_pci_set_window_128M;
adapter->pci_mem_read = netxen_nic_pci_mem_read_128M;
adapter->pci_mem_write = netxen_nic_pci_mem_write_128M;
/* 128 Meg of memory */
if (mem_len == NETXEN_PCI_128MB_SIZE) {
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);
first_page_group_start = FIRST_PAGE_GROUP_START;
first_page_group_end = FIRST_PAGE_GROUP_END;
} else if (mem_len == NETXEN_PCI_32MB_SIZE) {
mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
first_page_group_start = 0;
first_page_group_end = 0;
} else if (mem_len == NETXEN_PCI_2MB_SIZE) {
adapter->hw_write_wx = netxen_nic_hw_write_wx_2M;
adapter->hw_read_wx = netxen_nic_hw_read_wx_2M;
adapter->pci_read_immediate = netxen_nic_pci_read_immediate_2M;
adapter->pci_write_immediate =
netxen_nic_pci_write_immediate_2M;
adapter->pci_read_normalize = netxen_nic_pci_read_normalize_2M;
adapter->pci_write_normalize =
netxen_nic_pci_write_normalize_2M;
adapter->pci_set_window = netxen_nic_pci_set_window_2M;
adapter->pci_mem_read = netxen_nic_pci_mem_read_2M;
adapter->pci_mem_write = netxen_nic_pci_mem_write_2M;
mem_ptr0 = ioremap(mem_base, mem_len);
pci_len0 = mem_len;
first_page_group_start = 0;
first_page_group_end = 0;
adapter->ahw.ddr_mn_window = 0;
adapter->ahw.qdr_sn_window = 0;
adapter->ahw.mn_win_crb = 0x100000 + PCIX_MN_WINDOW +
(pci_func_id * 0x20);
adapter->ahw.ms_win_crb = 0x100000 + PCIX_SN_WINDOW;
if (pci_func_id < 4)
adapter->ahw.ms_win_crb += (pci_func_id * 0x20);
else
adapter->ahw.ms_win_crb +=
0xA0 + ((pci_func_id - 4) * 0x10);
} else {
err = -EIO;
goto err_out_free_netdev;
}
dev_info(&pdev->dev, "%dMB memory map\n", (int)(mem_len>>20));
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);
adapter->ahw.pci_base0 = mem_ptr0;
adapter->ahw.pci_len0 = pci_len0;
adapter->ahw.first_page_group_start = first_page_group_start;
adapter->ahw.first_page_group_end = first_page_group_end;
adapter->ahw.pci_base1 = mem_ptr1;
adapter->ahw.pci_base2 = mem_ptr2;
adapter->ahw.db_base = db_ptr;
adapter->ahw.db_len = db_len;
netif_napi_add(netdev, &adapter->napi,
netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
if (revision_id >= NX_P3_B0)
legacy_intrp = &legacy_intr[pci_func_id];
else
legacy_intrp = &legacy_intr[0];
adapter->legacy_intr.int_vec_bit = legacy_intrp->int_vec_bit;
adapter->legacy_intr.tgt_status_reg = legacy_intrp->tgt_status_reg;
adapter->legacy_intr.tgt_mask_reg = legacy_intrp->tgt_mask_reg;
adapter->legacy_intr.pci_int_reg = legacy_intrp->pci_int_reg;
/* this will be read from FW later */
adapter->intr_scheme = -1;
adapter->msi_mode = -1;
/* This will be reset for mezz cards */
adapter->portnum = pci_func_id;
adapter->status &= ~NETXEN_NETDEV_STATUS;
adapter->rx_csum = 1;
adapter->mc_enabled = 0;
if (NX_IS_REVISION_P3(revision_id))
adapter->max_mc_count = 38;
else
adapter->max_mc_count = 16;
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 = 2*HZ;
netxen_nic_change_mtu(netdev, netdev->mtu);
SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
#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 (NX_IS_REVISION_P3(revision_id))
netdev->features |= NETIF_F_TSO6;
if (adapter->pci_using_dac)
netdev->features |= NETIF_F_HIGHDMA;
/*
* 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;
if (netxen_nic_get_board_info(adapter) != 0) {
printk("%s: Error getting board config info.\n",
netxen_nic_driver_name);
err = -EIO;
goto err_out_iounmap;
}
netxen_initialize_adapter_ops(adapter);
/* Mezz cards have PCI function 0,2,3 enabled */
switch (adapter->ahw.boardcfg.board_type) {
case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
if (pci_func_id >= 2)
adapter->portnum = pci_func_id - 2;
break;
default:
break;
}
/*
* This call will setup various max rx/tx counts.
* It must be done before any buffer/ring allocations.
*/
netxen_check_options(adapter);
first_driver = 0;
if (NX_IS_REVISION_P3(revision_id)) {
if (adapter->ahw.pci_func == 0)
first_driver = 1;
} else {
if (adapter->portnum == 0)
first_driver = 1;
}
adapter->crb_addr_cmd_producer = crb_cmd_producer[adapter->portnum];
adapter->crb_addr_cmd_consumer = crb_cmd_consumer[adapter->portnum];
netxen_nic_update_cmd_producer(adapter, 0);
netxen_nic_update_cmd_consumer(adapter, 0);
if (first_driver) {
first_boot = adapter->pci_read_normalize(adapter,
NETXEN_CAM_RAM(0x1fc));
err = netxen_check_hw_init(adapter, first_boot);
if (err) {
printk(KERN_ERR "%s: error in init HW init sequence\n",
netxen_nic_driver_name);
goto err_out_iounmap;
}
if (NX_IS_REVISION_P3(revision_id))
netxen_set_port_mode(adapter);
if (first_boot != 0x55555555) {
adapter->pci_write_normalize(adapter,
CRB_CMDPEG_STATE, 0);
netxen_pinit_from_rom(adapter, 0);
msleep(1);
netxen_load_firmware(adapter);
}
if (NX_IS_REVISION_P3(revision_id))
netxen_pcie_strap_init(adapter);
if (NX_IS_REVISION_P2(revision_id)) {
/* Initialize multicast addr pool owners */
val = 0x7654;
if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
val |= 0x0f000000;
netxen_crb_writelit_adapter(adapter,
NETXEN_MAC_ADDR_CNTL_REG, val);
}
if ((first_boot == 0x55555555) &&
(NX_IS_REVISION_P2(revision_id))) {
/* Unlock the HW, prompting the boot sequence */
adapter->pci_write_normalize(adapter,
NETXEN_ROMUSB_GLB_PEGTUNE_DONE, 1);
}
err = netxen_initialize_adapter_offload(adapter);
if (err)
goto err_out_iounmap;
/*
* Tell the hardware our version number.
*/
i = (_NETXEN_NIC_LINUX_MAJOR << 16)
| ((_NETXEN_NIC_LINUX_MINOR << 8))
| (_NETXEN_NIC_LINUX_SUBVERSION);
adapter->pci_write_normalize(adapter, CRB_DRIVER_VERSION, i);
/* Handshake with the card before we register the devices. */
netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
if (NX_IS_REVISION_P3(revision_id)) {
adapter->hw_read_wx(adapter,
NETXEN_MIU_MN_CONTROL, &val, 4);
adapter->ahw.cut_through = (val & 0x4) ? 1 : 0;
dev_info(&pdev->dev, "firmware running in %s mode\n",
adapter->ahw.cut_through ? "cut through" : "legacy");
}
} /* first_driver */
netxen_nic_flash_print(adapter);
/*
* See if the firmware gave us a virtual-physical port mapping.
*/
adapter->physical_port = adapter->portnum;
i = adapter->pci_read_normalize(adapter, CRB_V2P(adapter->portnum));
if (i != 0x55555555)
adapter->physical_port = i;
adapter->flags &= ~(NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED);
netxen_set_msix_bit(pdev, 0);
if (NX_IS_REVISION_P3(revision_id)) {
if ((mem_len != NETXEN_PCI_128MB_SIZE) &&
mem_len != NETXEN_PCI_2MB_SIZE)
adapter->msix_supported = 0;
}
if (adapter->msix_supported) {
netxen_init_msix_entries(adapter);
if (pci_enable_msix(pdev, adapter->msix_entries,
MSIX_ENTRIES_PER_ADAPTER))
goto request_msi;
adapter->flags |= NETXEN_NIC_MSIX_ENABLED;
netxen_set_msix_bit(pdev, 1);
dev_info(&pdev->dev, "using msi-x interrupts\n");
} else {
request_msi:
if (use_msi && !pci_enable_msi(pdev)) {
adapter->flags |= NETXEN_NIC_MSI_ENABLED;
dev_info(&pdev->dev, "using msi interrupts\n");
} else
dev_info(&pdev->dev, "using legacy interrupts\n");
}
if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
netdev->irq = adapter->msix_entries[0].vector;
else
netdev->irq = pdev->irq;
err = netxen_receive_peg_ready(adapter);
if (err)
goto err_out_disable_msi;
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);
INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
if (netxen_is_flash_supported(adapter) == 0 &&
netxen_get_flash_mac_addr(adapter, mac_addr) == 0) {
unsigned char *p;
p = (unsigned char *)&mac_addr[adapter->portnum];
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 %s.\n",
netxen_nic_driver_name,
print_mac(mac, netdev->dev_addr));
} else {
adapter->macaddr_set(adapter, netdev->dev_addr);
}
}
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,
adapter->portnum);
err = -EIO;
goto err_out_disable_msi;
}
pci_set_drvdata(pdev, adapter);
switch (adapter->ahw.board_type) {
case NETXEN_NIC_GBE:
dev_info(&adapter->pdev->dev, "%s: GbE port initialized\n",
adapter->netdev->name);
break;
case NETXEN_NIC_XGBE:
dev_info(&adapter->pdev->dev, "%s: XGbE port initialized\n",
adapter->netdev->name);
break;
}
return 0;
err_out_disable_msi:
if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
pci_disable_msix(pdev);
if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
pci_disable_msi(pdev);
if (first_driver)
netxen_free_adapter_offload(adapter);
err_out_iounmap:
if (db_ptr)
iounmap(db_ptr);
if (mem_ptr0)
iounmap(mem_ptr0);
if (mem_ptr1)
iounmap(mem_ptr1);
if (mem_ptr2)
iounmap(mem_ptr2);
err_out_free_netdev:
free_netdev(netdev);
err_out_free_res:
pci_release_regions(pdev);
err_out_disable_pdev:
pci_set_drvdata(pdev, NULL);
pci_disable_device(pdev);
return err;
}
static void __devexit netxen_nic_remove(struct pci_dev *pdev)
{
struct netxen_adapter *adapter;
struct net_device *netdev;
adapter = pci_get_drvdata(pdev);
if (adapter == NULL)
return;
netdev = adapter->netdev;
unregister_netdev(netdev);
if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
netxen_free_hw_resources(adapter);
netxen_free_sw_resources(adapter);
}
if (adapter->portnum == 0)
netxen_free_adapter_offload(adapter);
if (adapter->irq)
free_irq(adapter->irq, adapter);
if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
pci_disable_msix(pdev);
if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
pci_disable_msi(pdev);
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);
free_netdev(netdev);
}
/*
* 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_adapter *adapter = (struct netxen_adapter *)netdev->priv;
int err = 0;
int ctx, ring;
irq_handler_t handler;
unsigned long flags = IRQF_SAMPLE_RANDOM;
if (adapter->driver_mismatch)
return -EIO;
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;
}
err = netxen_alloc_sw_resources(adapter);
if (err) {
printk(KERN_ERR "%s: Error in setting sw resources\n",
netdev->name);
return err;
}
netxen_nic_clear_stats(adapter);
err = netxen_alloc_hw_resources(adapter);
if (err) {
printk(KERN_ERR "%s: Error in setting hw resources\n",
netdev->name);
goto err_out_free_sw;
}
if (adapter->fw_major < 4) {
adapter->crb_addr_cmd_producer =
crb_cmd_producer[adapter->portnum];
adapter->crb_addr_cmd_consumer =
crb_cmd_consumer[adapter->portnum];
}
netxen_nic_update_cmd_producer(adapter, 0);
netxen_nic_update_cmd_consumer(adapter, 0);
for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
netxen_post_rx_buffers(adapter, ctx, ring);
}
if (NETXEN_IS_MSI_FAMILY(adapter))
handler = netxen_msi_intr;
else {
flags |= IRQF_SHARED;
handler = netxen_intr;
}
adapter->irq = netdev->irq;
err = request_irq(adapter->irq, handler,
flags, netdev->name, adapter);
if (err) {
printk(KERN_ERR "request_irq failed with: %d\n", err);
goto err_out_free_hw;
}
adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
}
/* Done here again so that even if phantom sw overwrote it,
* we set it */
err = adapter->init_port(adapter, adapter->portnum);
if (err) {
printk(KERN_ERR "%s: Failed to initialize port %d\n",
netxen_nic_driver_name, adapter->portnum);
goto err_out_free_irq;
}
adapter->macaddr_set(adapter, netdev->dev_addr);
netxen_nic_set_link_parameters(adapter);
netxen_nic_set_multi(netdev);
adapter->set_mtu(adapter, netdev->mtu);
mod_timer(&adapter->watchdog_timer, jiffies);
napi_enable(&adapter->napi);
netxen_nic_enable_int(adapter);
netif_start_queue(netdev);
return 0;
err_out_free_irq:
free_irq(adapter->irq, adapter);
err_out_free_hw:
netxen_free_hw_resources(adapter);
err_out_free_sw:
netxen_free_sw_resources(adapter);
return err;
}
/*
* netxen_nic_close - Disables a network interface entry point
*/
static int netxen_nic_close(struct net_device *netdev)
{
struct netxen_adapter *adapter = netdev_priv(netdev);
netif_carrier_off(netdev);
netif_stop_queue(netdev);
napi_disable(&adapter->napi);
if (adapter->stop_port)
adapter->stop_port(adapter);
netxen_nic_disable_int(adapter);
netxen_release_tx_buffers(adapter);
if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
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_adapter *adapter = netdev_priv(netdev);
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, consumer;
u32 saved_producer = 0;
struct cmd_desc_type0 *hwdesc;
int k;
struct netxen_cmd_buffer *pbuf = NULL;
int frag_count;
int no_of_desc;
u32 num_txd = adapter->max_tx_desc_count;
frag_count = skb_shinfo(skb)->nr_frags + 1;
/* 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 ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
sizeof(struct ethhdr)) >
(sizeof(struct cmd_desc_type0) - 2)) {
no_of_desc++;
}
}
}
producer = adapter->cmd_producer;
smp_mb();
consumer = adapter->last_cmd_consumer;
if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
netif_stop_queue(netdev);
smp_mb();
return NETDEV_TX_BUSY;
}
/* Copy the descriptors into the hardware */
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 = adapter->portnum;
buffrag = &pbuf->frag_array[0];
buffrag->dma = pci_map_single(adapter->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, adapter->portnum);
netxen_set_cmd_desc_ctxid(hwdesc, adapter->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, num_txd);
hwdesc = &hw->cmd_desc_head[producer];
memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
pbuf = &adapter->cmd_buf_arr[producer];
pbuf->skb = NULL;
}
frag = &skb_shinfo(skb)->frags[i - 1];
len = frag->size;
offset = frag->page_offset;
temp_len = len;
temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
len, PCI_DMA_TODEVICE);
buffrag++;
buffrag->dma = temp_dma;
buffrag->length = temp_len;
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, num_txd);
/* 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];
pbuf = &adapter->cmd_buf_arr[producer];
pbuf->skb = NULL;
/* copy the first 64 bytes */
memcpy(((void *)hwdesc) + 2,
(void *)(skb->data), first_hdr_len);
producer = get_next_index(producer, num_txd);
if (more_hdr) {
hwdesc = &hw->cmd_desc_head[producer];
pbuf = &adapter->cmd_buf_arr[producer];
pbuf->skb = NULL;
/* copy the next 64 bytes - should be enough except
* for pathological case
*/
skb_copy_from_linear_data_offset(skb, first_hdr_len,
hwdesc,
(hdr_len -
first_hdr_len));
producer = get_next_index(producer, num_txd);
}
}
adapter->cmd_producer = producer;
adapter->stats.txbytes += skb->len;
netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
adapter->stats.xmitcalled++;
netdev->trans_start = jiffies;
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_adapter *adapter = (struct netxen_adapter *)
netdev_priv(netdev);
SCHEDULE_WORK(&adapter->tx_timeout_task);
}
static void netxen_tx_timeout_task(struct work_struct *work)
{
struct netxen_adapter *adapter =
container_of(work, struct netxen_adapter, tx_timeout_task);
printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
netxen_nic_driver_name, adapter->netdev->name);
netxen_nic_disable_int(adapter);
napi_disable(&adapter->napi);
adapter->netdev->trans_start = jiffies;
napi_enable(&adapter->napi);
netxen_nic_enable_int(adapter);
netif_wake_queue(adapter->netdev);
}
static inline void
netxen_handle_int(struct netxen_adapter *adapter)
{
netxen_nic_disable_int(adapter);
napi_schedule(&adapter->napi);
}
static irqreturn_t netxen_intr(int irq, void *data)
{
struct netxen_adapter *adapter = data;
u32 our_int = 0;
our_int = adapter->pci_read_normalize(adapter, CRB_INT_VECTOR);
/* not our interrupt */
if ((our_int & (0x80 << adapter->portnum)) == 0)
return IRQ_NONE;
if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
/* claim interrupt */
adapter->pci_write_normalize(adapter, CRB_INT_VECTOR,
our_int & ~((u32)(0x80 << adapter->portnum)));
}
netxen_handle_int(adapter);
return IRQ_HANDLED;
}
static irqreturn_t netxen_msi_intr(int irq, void *data)
{
struct netxen_adapter *adapter = data;
netxen_handle_int(adapter);
return IRQ_HANDLED;
}
static int netxen_nic_poll(struct napi_struct *napi, int budget)
{
struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
int tx_complete;
int ctx;
int work_done;
tx_complete = netxen_process_cmd_ring(adapter);
work_done = 0;
for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
/*
* Fairness issue. This will give undue weight to the
* receive context 0.
*/
/*
* To avoid starvation, we give each of our receivers,
* a fraction of the quota. Sometimes, it might happen that we
* have enough quota to process every packet, but since all the
* packets are on one context, it gets only half of the quota,
* and ends up not processing it.
*/
work_done += netxen_process_rcv_ring(adapter, ctx,
budget / MAX_RCV_CTX);
}
if ((work_done < budget) && tx_complete) {
netif_rx_complete(adapter->netdev, &adapter->napi);
netxen_nic_enable_int(adapter);
}
return work_done;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void netxen_nic_poll_controller(struct net_device *netdev)
{
struct netxen_adapter *adapter = netdev_priv(netdev);
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")) == NULL)
return -ENOMEM;
return pci_register_driver(&netxen_driver);
}
module_init(netxen_init_module);
static void __exit netxen_exit_module(void)
{
pci_unregister_driver(&netxen_driver);
destroy_workqueue(netxen_workq);
}
module_exit(netxen_exit_module);
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