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kernel-fxtec-pro1x/drivers/net/netxen/netxen_nic_init.c
Mithlesh Thukral 3176ff3ee7 NetXen: Use multiple PCI functions 
NetXen: Make driver use multiple PCI functions.
This patch will make NetXen driver work with multiple PCI functions. This will
make the usage of memory resources as well as interrupts more independent
among different functions which results in better throughput. This change has
been done after the multiport support is added in firmware.

Signed-off by: Mithlesh Thukral <mithlesh@netxen.com>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-28 11:01:05 -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
*
*
* Source file for NIC routines to initialize the Phantom Hardware
*
*/
#include <linux/netdevice.h>
#include <linux/delay.h>
#include "netxen_nic.h"
#include "netxen_nic_hw.h"
#include "netxen_nic_phan_reg.h"
struct crb_addr_pair {
u32 addr;
u32 data;
};
unsigned long last_schedule_time;
#define NETXEN_MAX_CRB_XFORM 60
static unsigned int crb_addr_xform[NETXEN_MAX_CRB_XFORM];
#define NETXEN_ADDR_ERROR (0xffffffff)
#define crb_addr_transform(name) \
crb_addr_xform[NETXEN_HW_PX_MAP_CRB_##name] = \
NETXEN_HW_CRB_HUB_AGT_ADR_##name << 20
#define NETXEN_NIC_XDMA_RESET 0x8000ff
static inline void
netxen_nic_locked_write_reg(struct netxen_adapter *adapter,
unsigned long off, int *data)
{
void __iomem *addr = pci_base_offset(adapter, off);
writel(*data, addr);
}
static void crb_addr_transform_setup(void)
{
crb_addr_transform(XDMA);
crb_addr_transform(TIMR);
crb_addr_transform(SRE);
crb_addr_transform(SQN3);
crb_addr_transform(SQN2);
crb_addr_transform(SQN1);
crb_addr_transform(SQN0);
crb_addr_transform(SQS3);
crb_addr_transform(SQS2);
crb_addr_transform(SQS1);
crb_addr_transform(SQS0);
crb_addr_transform(RPMX7);
crb_addr_transform(RPMX6);
crb_addr_transform(RPMX5);
crb_addr_transform(RPMX4);
crb_addr_transform(RPMX3);
crb_addr_transform(RPMX2);
crb_addr_transform(RPMX1);
crb_addr_transform(RPMX0);
crb_addr_transform(ROMUSB);
crb_addr_transform(SN);
crb_addr_transform(QMN);
crb_addr_transform(QMS);
crb_addr_transform(PGNI);
crb_addr_transform(PGND);
crb_addr_transform(PGN3);
crb_addr_transform(PGN2);
crb_addr_transform(PGN1);
crb_addr_transform(PGN0);
crb_addr_transform(PGSI);
crb_addr_transform(PGSD);
crb_addr_transform(PGS3);
crb_addr_transform(PGS2);
crb_addr_transform(PGS1);
crb_addr_transform(PGS0);
crb_addr_transform(PS);
crb_addr_transform(PH);
crb_addr_transform(NIU);
crb_addr_transform(I2Q);
crb_addr_transform(EG);
crb_addr_transform(MN);
crb_addr_transform(MS);
crb_addr_transform(CAS2);
crb_addr_transform(CAS1);
crb_addr_transform(CAS0);
crb_addr_transform(CAM);
crb_addr_transform(C2C1);
crb_addr_transform(C2C0);
crb_addr_transform(SMB);
}
int netxen_init_firmware(struct netxen_adapter *adapter)
{
u32 state = 0, loops = 0, err = 0;
/* Window 1 call */
state = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
if (state == PHAN_INITIALIZE_ACK)
return 0;
while (state != PHAN_INITIALIZE_COMPLETE && loops < 2000) {
udelay(100);
/* Window 1 call */
state = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
loops++;
}
if (loops >= 2000) {
printk(KERN_ERR "Cmd Peg initialization not complete:%x.\n",
state);
err = -EIO;
return err;
}
/* Window 1 call */
writel(MPORT_MULTI_FUNCTION_MODE,
NETXEN_CRB_NORMALIZE(adapter, CRB_MPORT_MODE));
writel(PHAN_INITIALIZE_ACK,
NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
return err;
}
#define NETXEN_ADDR_LIMIT 0xffffffffULL
void *netxen_alloc(struct pci_dev *pdev, size_t sz, dma_addr_t * ptr,
struct pci_dev **used_dev)
{
void *addr;
addr = pci_alloc_consistent(pdev, sz, ptr);
if ((unsigned long long)(*ptr) < NETXEN_ADDR_LIMIT) {
*used_dev = pdev;
return addr;
}
pci_free_consistent(pdev, sz, addr, *ptr);
addr = pci_alloc_consistent(NULL, sz, ptr);
*used_dev = NULL;
return addr;
}
void netxen_initialize_adapter_sw(struct netxen_adapter *adapter)
{
int ctxid, ring;
u32 i;
u32 num_rx_bufs = 0;
struct netxen_rcv_desc_ctx *rcv_desc;
DPRINTK(INFO, "initializing some queues: %p\n", adapter);
for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
struct netxen_rx_buffer *rx_buf;
rcv_desc = &adapter->recv_ctx[ctxid].rcv_desc[ring];
rcv_desc->rcv_free = rcv_desc->max_rx_desc_count;
rcv_desc->begin_alloc = 0;
rx_buf = rcv_desc->rx_buf_arr;
num_rx_bufs = rcv_desc->max_rx_desc_count;
/*
* Now go through all of them, set reference handles
* and put them in the queues.
*/
for (i = 0; i < num_rx_bufs; i++) {
rx_buf->ref_handle = i;
rx_buf->state = NETXEN_BUFFER_FREE;
DPRINTK(INFO, "Rx buf:ctx%d i(%d) rx_buf:"
"%p\n", ctxid, i, rx_buf);
rx_buf++;
}
}
}
}
void netxen_initialize_adapter_hw(struct netxen_adapter *adapter)
{
int ports = 0;
struct netxen_board_info *board_info = &(adapter->ahw.boardcfg);
if (netxen_nic_get_board_info(adapter) != 0)
printk("%s: Error getting board config info.\n",
netxen_nic_driver_name);
get_brd_port_by_type(board_info->board_type, &ports);
if (ports == 0)
printk(KERN_ERR "%s: Unknown board type\n",
netxen_nic_driver_name);
adapter->ahw.max_ports = ports;
}
void netxen_initialize_adapter_ops(struct netxen_adapter *adapter)
{
switch (adapter->ahw.board_type) {
case NETXEN_NIC_GBE:
adapter->enable_phy_interrupts =
netxen_niu_gbe_enable_phy_interrupts;
adapter->disable_phy_interrupts =
netxen_niu_gbe_disable_phy_interrupts;
adapter->handle_phy_intr = netxen_nic_gbe_handle_phy_intr;
adapter->macaddr_set = netxen_niu_macaddr_set;
adapter->set_mtu = netxen_nic_set_mtu_gb;
adapter->set_promisc = netxen_niu_set_promiscuous_mode;
adapter->unset_promisc = netxen_niu_set_promiscuous_mode;
adapter->phy_read = netxen_niu_gbe_phy_read;
adapter->phy_write = netxen_niu_gbe_phy_write;
adapter->init_port = netxen_niu_gbe_init_port;
adapter->init_niu = netxen_nic_init_niu_gb;
adapter->stop_port = netxen_niu_disable_gbe_port;
break;
case NETXEN_NIC_XGBE:
adapter->enable_phy_interrupts =
netxen_niu_xgbe_enable_phy_interrupts;
adapter->disable_phy_interrupts =
netxen_niu_xgbe_disable_phy_interrupts;
adapter->handle_phy_intr = netxen_nic_xgbe_handle_phy_intr;
adapter->macaddr_set = netxen_niu_xg_macaddr_set;
adapter->set_mtu = netxen_nic_set_mtu_xgb;
adapter->init_port = netxen_niu_xg_init_port;
adapter->set_promisc = netxen_niu_xg_set_promiscuous_mode;
adapter->unset_promisc = netxen_niu_xg_set_promiscuous_mode;
adapter->stop_port = netxen_niu_disable_xg_port;
break;
default:
break;
}
}
/*
* netxen_decode_crb_addr(0 - utility to translate from internal Phantom CRB
* address to external PCI CRB address.
*/
u32 netxen_decode_crb_addr(u32 addr)
{
int i;
u32 base_addr, offset, pci_base;
crb_addr_transform_setup();
pci_base = NETXEN_ADDR_ERROR;
base_addr = addr & 0xfff00000;
offset = addr & 0x000fffff;
for (i = 0; i < NETXEN_MAX_CRB_XFORM; i++) {
if (crb_addr_xform[i] == base_addr) {
pci_base = i << 20;
break;
}
}
if (pci_base == NETXEN_ADDR_ERROR)
return pci_base;
else
return (pci_base + offset);
}
static long rom_max_timeout = 10000;
static long rom_lock_timeout = 1000000;
static long rom_write_timeout = 700;
static inline int rom_lock(struct netxen_adapter *adapter)
{
int iter;
u32 done = 0;
int timeout = 0;
while (!done) {
/* acquire semaphore2 from PCI HW block */
netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(PCIE_SEM2_LOCK),
&done);
if (done == 1)
break;
if (timeout >= rom_lock_timeout)
return -EIO;
timeout++;
/*
* Yield CPU
*/
if (!in_atomic())
schedule();
else {
for (iter = 0; iter < 20; iter++)
cpu_relax(); /*This a nop instr on i386 */
}
}
netxen_nic_reg_write(adapter, NETXEN_ROM_LOCK_ID, ROM_LOCK_DRIVER);
return 0;
}
int netxen_wait_rom_done(struct netxen_adapter *adapter)
{
long timeout = 0;
long done = 0;
while (done == 0) {
done = netxen_nic_reg_read(adapter, NETXEN_ROMUSB_GLB_STATUS);
done &= 2;
timeout++;
if (timeout >= rom_max_timeout) {
printk("Timeout reached waiting for rom done");
return -EIO;
}
}
return 0;
}
static inline int netxen_rom_wren(struct netxen_adapter *adapter)
{
/* Set write enable latch in ROM status register */
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE,
M25P_INSTR_WREN);
if (netxen_wait_rom_done(adapter)) {
return -1;
}
return 0;
}
static inline unsigned int netxen_rdcrbreg(struct netxen_adapter *adapter,
unsigned int addr)
{
unsigned int data = 0xdeaddead;
data = netxen_nic_reg_read(adapter, addr);
return data;
}
static inline int netxen_do_rom_rdsr(struct netxen_adapter *adapter)
{
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE,
M25P_INSTR_RDSR);
if (netxen_wait_rom_done(adapter)) {
return -1;
}
return netxen_rdcrbreg(adapter, NETXEN_ROMUSB_ROM_RDATA);
}
static inline void netxen_rom_unlock(struct netxen_adapter *adapter)
{
u32 val;
/* release semaphore2 */
netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(PCIE_SEM2_UNLOCK), &val);
}
int netxen_rom_wip_poll(struct netxen_adapter *adapter)
{
long timeout = 0;
long wip = 1;
int val;
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
while (wip != 0) {
val = netxen_do_rom_rdsr(adapter);
wip = val & 1;
timeout++;
if (timeout > rom_max_timeout) {
return -1;
}
}
return 0;
}
static inline int do_rom_fast_write(struct netxen_adapter *adapter, int addr,
int data)
{
if (netxen_rom_wren(adapter)) {
return -1;
}
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_WDATA, data);
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE,
M25P_INSTR_PP);
if (netxen_wait_rom_done(adapter)) {
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
return -1;
}
return netxen_rom_wip_poll(adapter);
}
static inline int
do_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
{
if (jiffies > (last_schedule_time + (8 * HZ))) {
last_schedule_time = jiffies;
schedule();
}
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
udelay(100); /* prevent bursting on CRB */
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE, 0xb);
if (netxen_wait_rom_done(adapter)) {
printk("Error waiting for rom done\n");
return -EIO;
}
/* reset abyte_cnt and dummy_byte_cnt */
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
udelay(100); /* prevent bursting on CRB */
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
*valp = netxen_nic_reg_read(adapter, NETXEN_ROMUSB_ROM_RDATA);
return 0;
}
static inline int
do_rom_fast_read_words(struct netxen_adapter *adapter, int addr,
u8 *bytes, size_t size)
{
int addridx;
int ret = 0;
for (addridx = addr; addridx < (addr + size); addridx += 4) {
ret = do_rom_fast_read(adapter, addridx, (int *)bytes);
*(int *)bytes = cpu_to_le32(*(int *)bytes);
if (ret != 0)
break;
bytes += 4;
}
return ret;
}
int
netxen_rom_fast_read_words(struct netxen_adapter *adapter, int addr,
u8 *bytes, size_t size)
{
int ret;
ret = rom_lock(adapter);
if (ret < 0)
return ret;
ret = do_rom_fast_read_words(adapter, addr, bytes, size);
netxen_rom_unlock(adapter);
return ret;
}
int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
{
int ret;
if (rom_lock(adapter) != 0)
return -EIO;
ret = do_rom_fast_read(adapter, addr, valp);
netxen_rom_unlock(adapter);
return ret;
}
int netxen_rom_fast_write(struct netxen_adapter *adapter, int addr, int data)
{
int ret = 0;
if (rom_lock(adapter) != 0) {
return -1;
}
ret = do_rom_fast_write(adapter, addr, data);
netxen_rom_unlock(adapter);
return ret;
}
static inline int do_rom_fast_write_words(struct netxen_adapter *adapter,
int addr, u8 *bytes, size_t size)
{
int addridx = addr;
int ret = 0;
while (addridx < (addr + size)) {
int last_attempt = 0;
int timeout = 0;
int data;
data = le32_to_cpu((*(u32*)bytes));
ret = do_rom_fast_write(adapter, addridx, data);
if (ret < 0)
return ret;
while(1) {
int data1;
ret = do_rom_fast_read(adapter, addridx, &data1);
if (ret < 0)
return ret;
if (data1 == data)
break;
if (timeout++ >= rom_write_timeout) {
if (last_attempt++ < 4) {
ret = do_rom_fast_write(adapter,
addridx, data);
if (ret < 0)
return ret;
}
else {
printk(KERN_INFO "Data write did not "
"succeed at address 0x%x\n", addridx);
break;
}
}
}
bytes += 4;
addridx += 4;
}
return ret;
}
int netxen_rom_fast_write_words(struct netxen_adapter *adapter, int addr,
u8 *bytes, size_t size)
{
int ret = 0;
ret = rom_lock(adapter);
if (ret < 0)
return ret;
ret = do_rom_fast_write_words(adapter, addr, bytes, size);
netxen_rom_unlock(adapter);
return ret;
}
int netxen_rom_wrsr(struct netxen_adapter *adapter, int data)
{
int ret;
ret = netxen_rom_wren(adapter);
if (ret < 0)
return ret;
netxen_crb_writelit_adapter(adapter, NETXEN_ROMUSB_ROM_WDATA, data);
netxen_crb_writelit_adapter(adapter,
NETXEN_ROMUSB_ROM_INSTR_OPCODE, 0x1);
ret = netxen_wait_rom_done(adapter);
if (ret < 0)
return ret;
return netxen_rom_wip_poll(adapter);
}
int netxen_rom_rdsr(struct netxen_adapter *adapter)
{
int ret;
ret = rom_lock(adapter);
if (ret < 0)
return ret;
ret = netxen_do_rom_rdsr(adapter);
netxen_rom_unlock(adapter);
return ret;
}
int netxen_backup_crbinit(struct netxen_adapter *adapter)
{
int ret = FLASH_SUCCESS;
int val;
char *buffer = kmalloc(FLASH_SECTOR_SIZE, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
/* unlock sector 63 */
val = netxen_rom_rdsr(adapter);
val = val & 0xe3;
ret = netxen_rom_wrsr(adapter, val);
if (ret != FLASH_SUCCESS)
goto out_kfree;
ret = netxen_rom_wip_poll(adapter);
if (ret != FLASH_SUCCESS)
goto out_kfree;
/* copy sector 0 to sector 63 */
ret = netxen_rom_fast_read_words(adapter, CRBINIT_START,
buffer, FLASH_SECTOR_SIZE);
if (ret != FLASH_SUCCESS)
goto out_kfree;
ret = netxen_rom_fast_write_words(adapter, FIXED_START,
buffer, FLASH_SECTOR_SIZE);
if (ret != FLASH_SUCCESS)
goto out_kfree;
/* lock sector 63 */
val = netxen_rom_rdsr(adapter);
if (!(val & 0x8)) {
val |= (0x1 << 2);
/* lock sector 63 */
if (netxen_rom_wrsr(adapter, val) == 0) {
ret = netxen_rom_wip_poll(adapter);
if (ret != FLASH_SUCCESS)
goto out_kfree;
/* lock SR writes */
ret = netxen_rom_wip_poll(adapter);
if (ret != FLASH_SUCCESS)
goto out_kfree;
}
}
out_kfree:
kfree(buffer);
return ret;
}
int netxen_do_rom_se(struct netxen_adapter *adapter, int addr)
{
netxen_rom_wren(adapter);
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE,
M25P_INSTR_SE);
if (netxen_wait_rom_done(adapter)) {
netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
return -1;
}
return netxen_rom_wip_poll(adapter);
}
void check_erased_flash(struct netxen_adapter *adapter, int addr)
{
int i;
int val;
int count = 0, erased_errors = 0;
int range;
range = (addr == USER_START) ? FIXED_START : addr + FLASH_SECTOR_SIZE;
for (i = addr; i < range; i += 4) {
netxen_rom_fast_read(adapter, i, &val);
if (val != 0xffffffff)
erased_errors++;
count++;
}
if (erased_errors)
printk(KERN_INFO "0x%x out of 0x%x words fail to be erased "
"for sector address: %x\n", erased_errors, count, addr);
}
int netxen_rom_se(struct netxen_adapter *adapter, int addr)
{
int ret = 0;
if (rom_lock(adapter) != 0) {
return -1;
}
ret = netxen_do_rom_se(adapter, addr);
netxen_rom_unlock(adapter);
msleep(30);
check_erased_flash(adapter, addr);
return ret;
}
int
netxen_flash_erase_sections(struct netxen_adapter *adapter, int start, int end)
{
int ret = FLASH_SUCCESS;
int i;
for (i = start; i < end; i++) {
ret = netxen_rom_se(adapter, i * FLASH_SECTOR_SIZE);
if (ret)
break;
ret = netxen_rom_wip_poll(adapter);
if (ret < 0)
return ret;
}
return ret;
}
int
netxen_flash_erase_secondary(struct netxen_adapter *adapter)
{
int ret = FLASH_SUCCESS;
int start, end;
start = SECONDARY_START / FLASH_SECTOR_SIZE;
end = USER_START / FLASH_SECTOR_SIZE;
ret = netxen_flash_erase_sections(adapter, start, end);
return ret;
}
int
netxen_flash_erase_primary(struct netxen_adapter *adapter)
{
int ret = FLASH_SUCCESS;
int start, end;
start = PRIMARY_START / FLASH_SECTOR_SIZE;
end = SECONDARY_START / FLASH_SECTOR_SIZE;
ret = netxen_flash_erase_sections(adapter, start, end);
return ret;
}
void netxen_halt_pegs(struct netxen_adapter *adapter)
{
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_0 + 0x3c, 1);
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_1 + 0x3c, 1);
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_2 + 0x3c, 1);
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_3 + 0x3c, 1);
}
int netxen_flash_unlock(struct netxen_adapter *adapter)
{
int ret = 0;
ret = netxen_rom_wrsr(adapter, 0);
if (ret < 0)
return ret;
ret = netxen_rom_wren(adapter);
if (ret < 0)
return ret;
return ret;
}
#define NETXEN_BOARDTYPE 0x4008
#define NETXEN_BOARDNUM 0x400c
#define NETXEN_CHIPNUM 0x4010
#define NETXEN_ROMBUS_RESET 0xFFFFFFFF
#define NETXEN_ROM_FIRST_BARRIER 0x800000000ULL
#define NETXEN_ROM_FOUND_INIT 0x400
int netxen_pinit_from_rom(struct netxen_adapter *adapter, int verbose)
{
int addr, val, status;
int n, i;
int init_delay = 0;
struct crb_addr_pair *buf;
u32 off;
/* resetall */
status = netxen_nic_get_board_info(adapter);
if (status)
printk("%s: netxen_pinit_from_rom: Error getting board info\n",
netxen_nic_driver_name);
netxen_crb_writelit_adapter(adapter, NETXEN_ROMUSB_GLB_SW_RESET,
NETXEN_ROMBUS_RESET);
if (verbose) {
int val;
if (netxen_rom_fast_read(adapter, NETXEN_BOARDTYPE, &val) == 0)
printk("P2 ROM board type: 0x%08x\n", val);
else
printk("Could not read board type\n");
if (netxen_rom_fast_read(adapter, NETXEN_BOARDNUM, &val) == 0)
printk("P2 ROM board num: 0x%08x\n", val);
else
printk("Could not read board number\n");
if (netxen_rom_fast_read(adapter, NETXEN_CHIPNUM, &val) == 0)
printk("P2 ROM chip num: 0x%08x\n", val);
else
printk("Could not read chip number\n");
}
if (netxen_rom_fast_read(adapter, 0, &n) == 0
&& (n & NETXEN_ROM_FIRST_BARRIER)) {
n &= ~NETXEN_ROM_ROUNDUP;
if (n < NETXEN_ROM_FOUND_INIT) {
if (verbose)
printk("%s: %d CRB init values found"
" in ROM.\n", netxen_nic_driver_name, n);
} else {
printk("%s:n=0x%x Error! NetXen card flash not"
" initialized.\n", __FUNCTION__, n);
return -EIO;
}
buf = kcalloc(n, sizeof(struct crb_addr_pair), GFP_KERNEL);
if (buf == NULL) {
printk("%s: netxen_pinit_from_rom: Unable to calloc "
"memory.\n", netxen_nic_driver_name);
return -ENOMEM;
}
for (i = 0; i < n; i++) {
if (netxen_rom_fast_read(adapter, 8 * i + 4, &val) != 0
|| netxen_rom_fast_read(adapter, 8 * i + 8,
&addr) != 0)
return -EIO;
buf[i].addr = addr;
buf[i].data = val;
if (verbose)
printk("%s: PCI: 0x%08x == 0x%08x\n",
netxen_nic_driver_name, (unsigned int)
netxen_decode_crb_addr(addr), val);
}
for (i = 0; i < n; i++) {
off = netxen_decode_crb_addr(buf[i].addr);
if (off == NETXEN_ADDR_ERROR) {
printk(KERN_ERR"CRB init value out of range %x\n",
buf[i].addr);
continue;
}
off += NETXEN_PCI_CRBSPACE;
/* skipping cold reboot MAGIC */
if (off == NETXEN_CAM_RAM(0x1fc))
continue;
/* After writing this register, HW needs time for CRB */
/* to quiet down (else crb_window returns 0xffffffff) */
if (off == NETXEN_ROMUSB_GLB_SW_RESET) {
init_delay = 1;
/* hold xdma in reset also */
buf[i].data = NETXEN_NIC_XDMA_RESET;
}
if (ADDR_IN_WINDOW1(off)) {
writel(buf[i].data,
NETXEN_CRB_NORMALIZE(adapter, off));
} else {
netxen_nic_pci_change_crbwindow(adapter, 0);
writel(buf[i].data,
pci_base_offset(adapter, off));
netxen_nic_pci_change_crbwindow(adapter, 1);
}
if (init_delay == 1) {
ssleep(1);
init_delay = 0;
}
msleep(1);
}
kfree(buf);
/* disable_peg_cache_all */
/* unreset_net_cache */
netxen_nic_hw_read_wx(adapter, NETXEN_ROMUSB_GLB_SW_RESET, &val,
4);
netxen_crb_writelit_adapter(adapter, NETXEN_ROMUSB_GLB_SW_RESET,
(val & 0xffffff0f));
/* p2dn replyCount */
netxen_crb_writelit_adapter(adapter,
NETXEN_CRB_PEG_NET_D + 0xec, 0x1e);
/* disable_peg_cache 0 */
netxen_crb_writelit_adapter(adapter,
NETXEN_CRB_PEG_NET_D + 0x4c, 8);
/* disable_peg_cache 1 */
netxen_crb_writelit_adapter(adapter,
NETXEN_CRB_PEG_NET_I + 0x4c, 8);
/* peg_clr_all */
/* peg_clr 0 */
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_0 + 0x8,
0);
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_0 + 0xc,
0);
/* peg_clr 1 */
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_1 + 0x8,
0);
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_1 + 0xc,
0);
/* peg_clr 2 */
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_2 + 0x8,
0);
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_2 + 0xc,
0);
/* peg_clr 3 */
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_3 + 0x8,
0);
netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_3 + 0xc,
0);
}
return 0;
}
int netxen_initialize_adapter_offload(struct netxen_adapter *adapter)
{
uint64_t addr;
uint32_t hi;
uint32_t lo;
adapter->dummy_dma.addr =
pci_alloc_consistent(adapter->ahw.pdev,
NETXEN_HOST_DUMMY_DMA_SIZE,
&adapter->dummy_dma.phys_addr);
if (adapter->dummy_dma.addr == NULL) {
printk("%s: ERROR: Could not allocate dummy DMA memory\n",
__FUNCTION__);
return -ENOMEM;
}
addr = (uint64_t) adapter->dummy_dma.phys_addr;
hi = (addr >> 32) & 0xffffffff;
lo = addr & 0xffffffff;
writel(hi, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_DUMMY_BUF_ADDR_HI));
writel(lo, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_DUMMY_BUF_ADDR_LO));
return 0;
}
void netxen_free_adapter_offload(struct netxen_adapter *adapter)
{
if (adapter->dummy_dma.addr) {
writel(0, NETXEN_CRB_NORMALIZE(adapter,
CRB_HOST_DUMMY_BUF_ADDR_HI));
writel(0, NETXEN_CRB_NORMALIZE(adapter,
CRB_HOST_DUMMY_BUF_ADDR_LO));
pci_free_consistent(adapter->ahw.pdev,
NETXEN_HOST_DUMMY_DMA_SIZE,
adapter->dummy_dma.addr,
adapter->dummy_dma.phys_addr);
adapter->dummy_dma.addr = NULL;
}
}
void netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val)
{
u32 val = 0;
int loops = 0;
if (!pegtune_val) {
val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
while (val != PHAN_INITIALIZE_COMPLETE && loops < 200000) {
udelay(100);
schedule();
val =
readl(NETXEN_CRB_NORMALIZE
(adapter, CRB_CMDPEG_STATE));
loops++;
}
if (val != PHAN_INITIALIZE_COMPLETE)
printk("WARNING: Initial boot wait loop failed...\n");
}
}
int netxen_nic_rx_has_work(struct netxen_adapter *adapter)
{
int ctx;
for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
struct netxen_recv_context *recv_ctx =
&(adapter->recv_ctx[ctx]);
u32 consumer;
struct status_desc *desc_head;
struct status_desc *desc;
consumer = recv_ctx->status_rx_consumer;
desc_head = recv_ctx->rcv_status_desc_head;
desc = &desc_head[consumer];
if (netxen_get_sts_owner(desc) & STATUS_OWNER_HOST)
return 1;
}
return 0;
}
static inline int netxen_nic_check_temp(struct netxen_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
uint32_t temp, temp_state, temp_val;
int rv = 0;
temp = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_TEMP_STATE));
temp_state = nx_get_temp_state(temp);
temp_val = nx_get_temp_val(temp);
if (temp_state == NX_TEMP_PANIC) {
printk(KERN_ALERT
"%s: Device temperature %d degrees C exceeds"
" maximum allowed. Hardware has been shut down.\n",
netxen_nic_driver_name, temp_val);
netif_carrier_off(netdev);
netif_stop_queue(netdev);
rv = 1;
} else if (temp_state == NX_TEMP_WARN) {
if (adapter->temp == NX_TEMP_NORMAL) {
printk(KERN_ALERT
"%s: Device temperature %d degrees C "
"exceeds operating range."
" Immediate action needed.\n",
netxen_nic_driver_name, temp_val);
}
} else {
if (adapter->temp == NX_TEMP_WARN) {
printk(KERN_INFO
"%s: Device temperature is now %d degrees C"
" in normal range.\n", netxen_nic_driver_name,
temp_val);
}
}
adapter->temp = temp_state;
return rv;
}
void netxen_watchdog_task(struct work_struct *work)
{
struct net_device *netdev;
struct netxen_adapter *adapter =
container_of(work, struct netxen_adapter, watchdog_task);
if (netxen_nic_check_temp(adapter))
return;
netdev = adapter->netdev;
if ((netif_running(netdev)) && !netif_carrier_ok(netdev)) {
printk(KERN_INFO "%s port %d, %s carrier is now ok\n",
netxen_nic_driver_name, adapter->portnum, netdev->name);
netif_carrier_on(netdev);
}
if (netif_queue_stopped(netdev))
netif_wake_queue(netdev);
if (adapter->handle_phy_intr)
adapter->handle_phy_intr(adapter);
mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
}
/*
* netxen_process_rcv() send the received packet to the protocol stack.
* and if the number of receives exceeds RX_BUFFERS_REFILL, then we
* invoke the routine to send more rx buffers to the Phantom...
*/
void
netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
struct status_desc *desc)
{
struct pci_dev *pdev = adapter->pdev;
struct net_device *netdev = adapter->netdev;
int index = netxen_get_sts_refhandle(desc);
struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctxid]);
struct netxen_rx_buffer *buffer;
struct sk_buff *skb;
u32 length = netxen_get_sts_totallength(desc);
u32 desc_ctx;
struct netxen_rcv_desc_ctx *rcv_desc;
int ret;
desc_ctx = netxen_get_sts_type(desc);
if (unlikely(desc_ctx >= NUM_RCV_DESC_RINGS)) {
printk("%s: %s Bad Rcv descriptor ring\n",
netxen_nic_driver_name, netdev->name);
return;
}
rcv_desc = &recv_ctx->rcv_desc[desc_ctx];
if (unlikely(index > rcv_desc->max_rx_desc_count)) {
DPRINTK(ERR, "Got a buffer index:%x Max is %x\n",
index, rcv_desc->max_rx_desc_count);
return;
}
buffer = &rcv_desc->rx_buf_arr[index];
if (desc_ctx == RCV_DESC_LRO_CTXID) {
buffer->lro_current_frags++;
if (netxen_get_sts_desc_lro_last_frag(desc)) {
buffer->lro_expected_frags =
netxen_get_sts_desc_lro_cnt(desc);
buffer->lro_length = length;
}
if (buffer->lro_current_frags != buffer->lro_expected_frags) {
if (buffer->lro_expected_frags != 0) {
printk("LRO: (refhandle:%x) recv frag."
"wait for last. flags: %x expected:%d"
"have:%d\n", index,
netxen_get_sts_desc_lro_last_frag(desc),
buffer->lro_expected_frags,
buffer->lro_current_frags);
}
return;
}
}
pci_unmap_single(pdev, buffer->dma, rcv_desc->dma_size,
PCI_DMA_FROMDEVICE);
skb = (struct sk_buff *)buffer->skb;
if (likely(netxen_get_sts_status(desc) == STATUS_CKSUM_OK)) {
adapter->stats.csummed++;
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
if (desc_ctx == RCV_DESC_LRO_CTXID) {
/* True length was only available on the last pkt */
skb_put(skb, buffer->lro_length);
} else {
skb_put(skb, length);
}
skb->protocol = eth_type_trans(skb, netdev);
ret = netif_receive_skb(skb);
/*
* RH: Do we need these stats on a regular basis. Can we get it from
* Linux stats.
*/
switch (ret) {
case NET_RX_SUCCESS:
adapter->stats.uphappy++;
break;
case NET_RX_CN_LOW:
adapter->stats.uplcong++;
break;
case NET_RX_CN_MOD:
adapter->stats.upmcong++;
break;
case NET_RX_CN_HIGH:
adapter->stats.uphcong++;
break;
case NET_RX_DROP:
adapter->stats.updropped++;
break;
default:
adapter->stats.updunno++;
break;
}
netdev->last_rx = jiffies;
rcv_desc->rcv_free++;
rcv_desc->rcv_pending--;
/*
* We just consumed one buffer so post a buffer.
*/
buffer->skb = NULL;
buffer->state = NETXEN_BUFFER_FREE;
buffer->lro_current_frags = 0;
buffer->lro_expected_frags = 0;
adapter->stats.no_rcv++;
adapter->stats.rxbytes += length;
}
/* Process Receive status ring */
u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max)
{
struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctxid]);
struct status_desc *desc_head = recv_ctx->rcv_status_desc_head;
struct status_desc *desc; /* used to read status desc here */
u32 consumer = recv_ctx->status_rx_consumer;
u32 producer = 0;
int count = 0, ring;
DPRINTK(INFO, "procesing receive\n");
/*
* we assume in this case that there is only one port and that is
* port #1...changes need to be done in firmware to indicate port
* number as part of the descriptor. This way we will be able to get
* the netdev which is associated with that device.
*/
while (count < max) {
desc = &desc_head[consumer];
if (!(netxen_get_sts_owner(desc) & STATUS_OWNER_HOST)) {
DPRINTK(ERR, "desc %p ownedby %x\n", desc,
netxen_get_sts_owner(desc));
break;
}
netxen_process_rcv(adapter, ctxid, desc);
netxen_clear_sts_owner(desc);
netxen_set_sts_owner(desc, STATUS_OWNER_PHANTOM);
consumer = (consumer + 1) & (adapter->max_rx_desc_count - 1);
count++;
}
if (count) {
for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
netxen_post_rx_buffers_nodb(adapter, ctxid, ring);
}
}
/* update the consumer index in phantom */
if (count) {
recv_ctx->status_rx_consumer = consumer;
recv_ctx->status_rx_producer = producer;
/* Window = 1 */
writel(consumer,
NETXEN_CRB_NORMALIZE(adapter,
recv_crb_registers[ctxid].
crb_rcv_status_consumer));
}
return count;
}
/* Process Command status ring */
int netxen_process_cmd_ring(unsigned long data)
{
u32 last_consumer;
u32 consumer;
struct netxen_adapter *adapter = (struct netxen_adapter *)data;
int count1 = 0;
int count2 = 0;
struct netxen_cmd_buffer *buffer;
struct pci_dev *pdev;
struct netxen_skb_frag *frag;
u32 i;
struct sk_buff *skb = NULL;
int done;
spin_lock(&adapter->tx_lock);
last_consumer = adapter->last_cmd_consumer;
DPRINTK(INFO, "procesing xmit complete\n");
/* we assume in this case that there is only one port and that is
* port #1...changes need to be done in firmware to indicate port
* number as part of the descriptor. This way we will be able to get
* the netdev which is associated with that device.
*/
consumer = le32_to_cpu(*(adapter->cmd_consumer));
if (last_consumer == consumer) { /* Ring is empty */
DPRINTK(INFO, "last_consumer %d == consumer %d\n",
last_consumer, consumer);
spin_unlock(&adapter->tx_lock);
return 1;
}
adapter->proc_cmd_buf_counter++;
/*
* Not needed - does not seem to be used anywhere.
* adapter->cmd_consumer = consumer;
*/
spin_unlock(&adapter->tx_lock);
while ((last_consumer != consumer) && (count1 < MAX_STATUS_HANDLE)) {
buffer = &adapter->cmd_buf_arr[last_consumer];
pdev = adapter->pdev;
frag = &buffer->frag_array[0];
skb = buffer->skb;
if (skb && (cmpxchg(&buffer->skb, skb, 0) == skb)) {
pci_unmap_single(pdev, frag->dma, frag->length,
PCI_DMA_TODEVICE);
for (i = 1; i < buffer->frag_count; i++) {
DPRINTK(INFO, "getting fragment no %d\n", i);
frag++; /* Get the next frag */
pci_unmap_page(pdev, frag->dma, frag->length,
PCI_DMA_TODEVICE);
}
adapter->stats.skbfreed++;
dev_kfree_skb_any(skb);
skb = NULL;
} else if (adapter->proc_cmd_buf_counter == 1) {
adapter->stats.txnullskb++;
}
if (unlikely(netif_queue_stopped(adapter->netdev)
&& netif_carrier_ok(adapter->netdev))
&& ((jiffies - adapter->netdev->trans_start) >
adapter->netdev->watchdog_timeo)) {
SCHEDULE_WORK(&adapter->tx_timeout_task);
}
last_consumer = get_next_index(last_consumer,
adapter->max_tx_desc_count);
count1++;
}
count2 = 0;
spin_lock(&adapter->tx_lock);
if ((--adapter->proc_cmd_buf_counter) == 0) {
adapter->last_cmd_consumer = last_consumer;
while ((adapter->last_cmd_consumer != consumer)
&& (count2 < MAX_STATUS_HANDLE)) {
buffer =
&adapter->cmd_buf_arr[adapter->last_cmd_consumer];
count2++;
if (buffer->skb)
break;
else
adapter->last_cmd_consumer =
get_next_index(adapter->last_cmd_consumer,
adapter->max_tx_desc_count);
}
}
if (count1 || count2) {
if (netif_queue_stopped(adapter->netdev)
&& (adapter->flags & NETXEN_NETDEV_STATUS)) {
netif_wake_queue(adapter->netdev);
adapter->flags &= ~NETXEN_NETDEV_STATUS;
}
}
/*
* If everything is freed up to consumer then check if the ring is full
* If the ring is full then check if more needs to be freed and
* schedule the call back again.
*
* This happens when there are 2 CPUs. One could be freeing and the
* other filling it. If the ring is full when we get out of here and
* the card has already interrupted the host then the host can miss the
* interrupt.
*
* There is still a possible race condition and the host could miss an
* interrupt. The card has to take care of this.
*/
if (adapter->last_cmd_consumer == consumer &&
(((adapter->cmd_producer + 1) %
adapter->max_tx_desc_count) == adapter->last_cmd_consumer)) {
consumer = le32_to_cpu(*(adapter->cmd_consumer));
}
done = (adapter->last_cmd_consumer == consumer);
spin_unlock(&adapter->tx_lock);
DPRINTK(INFO, "last consumer is %d in %s\n", last_consumer,
__FUNCTION__);
return (done);
}
/*
* netxen_post_rx_buffers puts buffer in the Phantom memory
*/
void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx, u32 ringid)
{
struct pci_dev *pdev = adapter->ahw.pdev;
struct sk_buff *skb;
struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctx]);
struct netxen_rcv_desc_ctx *rcv_desc = NULL;
uint producer;
struct rcv_desc *pdesc;
struct netxen_rx_buffer *buffer;
int count = 0;
int index = 0;
netxen_ctx_msg msg = 0;
dma_addr_t dma;
rcv_desc = &recv_ctx->rcv_desc[ringid];
producer = rcv_desc->producer;
index = rcv_desc->begin_alloc;
buffer = &rcv_desc->rx_buf_arr[index];
/* We can start writing rx descriptors into the phantom memory. */
while (buffer->state == NETXEN_BUFFER_FREE) {
skb = dev_alloc_skb(rcv_desc->skb_size);
if (unlikely(!skb)) {
/*
* TODO
* We need to schedule the posting of buffers to the pegs.
*/
rcv_desc->begin_alloc = index;
DPRINTK(ERR, "netxen_post_rx_buffers: "
" allocated only %d buffers\n", count);
break;
}
count++; /* now there should be no failure */
pdesc = &rcv_desc->desc_head[producer];
#if defined(XGB_DEBUG)
*(unsigned long *)(skb->head) = 0xc0debabe;
if (skb_is_nonlinear(skb)) {
printk("Allocated SKB @%p is nonlinear\n");
}
#endif
skb_reserve(skb, 2);
/* This will be setup when we receive the
* buffer after it has been filled FSL TBD TBD
* skb->dev = netdev;
*/
dma = pci_map_single(pdev, skb->data, rcv_desc->dma_size,
PCI_DMA_FROMDEVICE);
pdesc->addr_buffer = cpu_to_le64(dma);
buffer->skb = skb;
buffer->state = NETXEN_BUFFER_BUSY;
buffer->dma = dma;
/* make a rcv descriptor */
pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
pdesc->buffer_length = cpu_to_le32(rcv_desc->dma_size);
DPRINTK(INFO, "done writing descripter\n");
producer =
get_next_index(producer, rcv_desc->max_rx_desc_count);
index = get_next_index(index, rcv_desc->max_rx_desc_count);
buffer = &rcv_desc->rx_buf_arr[index];
}
/* if we did allocate buffers, then write the count to Phantom */
if (count) {
rcv_desc->begin_alloc = index;
rcv_desc->rcv_pending += count;
rcv_desc->producer = producer;
if (rcv_desc->rcv_free >= 32) {
rcv_desc->rcv_free = 0;
/* Window = 1 */
writel((producer - 1) &
(rcv_desc->max_rx_desc_count - 1),
NETXEN_CRB_NORMALIZE(adapter,
recv_crb_registers[
adapter->portnum].
rcv_desc_crb[ringid].
crb_rcv_producer_offset));
/*
* Write a doorbell msg to tell phanmon of change in
* receive ring producer
*/
netxen_set_msg_peg_id(msg, NETXEN_RCV_PEG_DB_ID);
netxen_set_msg_privid(msg);
netxen_set_msg_count(msg,
((producer -
1) & (rcv_desc->
max_rx_desc_count - 1)));
netxen_set_msg_ctxid(msg, adapter->portnum);
netxen_set_msg_opcode(msg, NETXEN_RCV_PRODUCER(ringid));
writel(msg,
DB_NORMALIZE(adapter,
NETXEN_RCV_PRODUCER_OFFSET));
}
}
}
void netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter, uint32_t ctx,
uint32_t ringid)
{
struct pci_dev *pdev = adapter->ahw.pdev;
struct sk_buff *skb;
struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctx]);
struct netxen_rcv_desc_ctx *rcv_desc = NULL;
u32 producer;
struct rcv_desc *pdesc;
struct netxen_rx_buffer *buffer;
int count = 0;
int index = 0;
rcv_desc = &recv_ctx->rcv_desc[ringid];
producer = rcv_desc->producer;
index = rcv_desc->begin_alloc;
buffer = &rcv_desc->rx_buf_arr[index];
/* We can start writing rx descriptors into the phantom memory. */
while (buffer->state == NETXEN_BUFFER_FREE) {
skb = dev_alloc_skb(rcv_desc->skb_size);
if (unlikely(!skb)) {
/*
* We need to schedule the posting of buffers to the pegs.
*/
rcv_desc->begin_alloc = index;
DPRINTK(ERR, "netxen_post_rx_buffers_nodb: "
" allocated only %d buffers\n", count);
break;
}
count++; /* now there should be no failure */
pdesc = &rcv_desc->desc_head[producer];
skb_reserve(skb, 2);
/*
* This will be setup when we receive the
* buffer after it has been filled
* skb->dev = netdev;
*/
buffer->skb = skb;
buffer->state = NETXEN_BUFFER_BUSY;
buffer->dma = pci_map_single(pdev, skb->data,
rcv_desc->dma_size,
PCI_DMA_FROMDEVICE);
/* make a rcv descriptor */
pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
pdesc->buffer_length = cpu_to_le32(rcv_desc->dma_size);
pdesc->addr_buffer = cpu_to_le64(buffer->dma);
DPRINTK(INFO, "done writing descripter\n");
producer =
get_next_index(producer, rcv_desc->max_rx_desc_count);
index = get_next_index(index, rcv_desc->max_rx_desc_count);
buffer = &rcv_desc->rx_buf_arr[index];
}
/* if we did allocate buffers, then write the count to Phantom */
if (count) {
rcv_desc->begin_alloc = index;
rcv_desc->rcv_pending += count;
rcv_desc->producer = producer;
if (rcv_desc->rcv_free >= 32) {
rcv_desc->rcv_free = 0;
/* Window = 1 */
writel((producer - 1) &
(rcv_desc->max_rx_desc_count - 1),
NETXEN_CRB_NORMALIZE(adapter,
recv_crb_registers[
adapter->portnum].
rcv_desc_crb[ringid].
crb_rcv_producer_offset));
wmb();
}
}
}
int netxen_nic_tx_has_work(struct netxen_adapter *adapter)
{
if (find_diff_among(adapter->last_cmd_consumer,
adapter->cmd_producer,
adapter->max_tx_desc_count) > 0)
return 1;
return 0;
}
void netxen_nic_clear_stats(struct netxen_adapter *adapter)
{
memset(&adapter->stats, 0, sizeof(adapter->stats));
return;
}
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