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linux/drivers/net/netxen/netxen_nic_init.c
Mithlesh Thukral 6d1495f29a NetXen: Fixes for Power PC architecture 
NetXen: Fix PPC architecture specific bugs
Fixes some issues seen on Big endian machines.

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

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-28 11:01:06 -04:00

1539 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
*
*
* 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_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 = 100;
static long rom_lock_timeout = 10000;
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);
if (ret != 0)
break;
*(int *)bytes = cpu_to_le32(*(int *)bytes);
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 &&
val != PHAN_INITIALIZE_ACK && 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 ((adapter->portnum == 0) && 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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