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linux/drivers/net/netxen/netxen_nic_init.c
David S. Miller babcda74e9 drivers/net: Kill now superfluous ->last_rx stores. 
The generic packet receive code takes care of setting
netdev->last_rx when necessary, for the sake of the
bonding ARP monitor.

Drivers need not do it any more.

Some cases had to be skipped over because the drivers
were making use of the ->last_rx value themselves.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-03 21:11:17 -08:00

1576 lines
39 KiB
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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;
};
#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 void netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter,
uint32_t ctx, uint32_t ringid);
#if 0
static 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);
}
#endif /* 0 */
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);
crb_addr_transform(OCM0);
crb_addr_transform(I2C0);
}
int netxen_init_firmware(struct netxen_adapter *adapter)
{
u32 state = 0, loops = 0, err = 0;
/* Window 1 call */
state = adapter->pci_read_normalize(adapter, CRB_CMDPEG_STATE);
if (state == PHAN_INITIALIZE_ACK)
return 0;
while (state != PHAN_INITIALIZE_COMPLETE && loops < 2000) {
msleep(1);
/* Window 1 call */
state = adapter->pci_read_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 */
adapter->pci_write_normalize(adapter,
CRB_NIC_CAPABILITIES_HOST, INTR_SCHEME_PERPORT);
adapter->pci_write_normalize(adapter,
CRB_NIC_MSI_MODE_HOST, MSI_MODE_MULTIFUNC);
adapter->pci_write_normalize(adapter,
CRB_MPORT_MODE, MPORT_MULTI_FUNCTION_MODE);
adapter->pci_write_normalize(adapter,
CRB_CMDPEG_STATE, PHAN_INITIALIZE_ACK);
return err;
}
void netxen_release_rx_buffers(struct netxen_adapter *adapter)
{
struct netxen_recv_context *recv_ctx;
struct nx_host_rds_ring *rds_ring;
struct netxen_rx_buffer *rx_buf;
int i, ctxid, ring;
for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
recv_ctx = &adapter->recv_ctx[ctxid];
for (ring = 0; ring < adapter->max_rds_rings; ring++) {
rds_ring = &recv_ctx->rds_rings[ring];
for (i = 0; i < rds_ring->max_rx_desc_count; ++i) {
rx_buf = &(rds_ring->rx_buf_arr[i]);
if (rx_buf->state == NETXEN_BUFFER_FREE)
continue;
pci_unmap_single(adapter->pdev,
rx_buf->dma,
rds_ring->dma_size,
PCI_DMA_FROMDEVICE);
if (rx_buf->skb != NULL)
dev_kfree_skb_any(rx_buf->skb);
}
}
}
}
void netxen_release_tx_buffers(struct netxen_adapter *adapter)
{
struct netxen_cmd_buffer *cmd_buf;
struct netxen_skb_frag *buffrag;
int i, j;
cmd_buf = adapter->cmd_buf_arr;
for (i = 0; i < adapter->max_tx_desc_count; i++) {
buffrag = cmd_buf->frag_array;
if (buffrag->dma) {
pci_unmap_single(adapter->pdev, buffrag->dma,
buffrag->length, PCI_DMA_TODEVICE);
buffrag->dma = 0ULL;
}
for (j = 0; j < cmd_buf->frag_count; j++) {
buffrag++;
if (buffrag->dma) {
pci_unmap_page(adapter->pdev, buffrag->dma,
buffrag->length,
PCI_DMA_TODEVICE);
buffrag->dma = 0ULL;
}
}
/* Free the skb we received in netxen_nic_xmit_frame */
if (cmd_buf->skb) {
dev_kfree_skb_any(cmd_buf->skb);
cmd_buf->skb = NULL;
}
cmd_buf++;
}
}
void netxen_free_sw_resources(struct netxen_adapter *adapter)
{
struct netxen_recv_context *recv_ctx;
struct nx_host_rds_ring *rds_ring;
int ctx, ring;
for (ctx = 0; ctx < MAX_RCV_CTX; ctx++) {
recv_ctx = &adapter->recv_ctx[ctx];
for (ring = 0; ring < adapter->max_rds_rings; ring++) {
rds_ring = &recv_ctx->rds_rings[ring];
if (rds_ring->rx_buf_arr) {
vfree(rds_ring->rx_buf_arr);
rds_ring->rx_buf_arr = NULL;
}
}
}
if (adapter->cmd_buf_arr)
vfree(adapter->cmd_buf_arr);
return;
}
int netxen_alloc_sw_resources(struct netxen_adapter *adapter)
{
struct netxen_recv_context *recv_ctx;
struct nx_host_rds_ring *rds_ring;
struct netxen_rx_buffer *rx_buf;
int ctx, ring, i, num_rx_bufs;
struct netxen_cmd_buffer *cmd_buf_arr;
struct net_device *netdev = adapter->netdev;
cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
if (cmd_buf_arr == NULL) {
printk(KERN_ERR "%s: Failed to allocate cmd buffer ring\n",
netdev->name);
return -ENOMEM;
}
memset(cmd_buf_arr, 0, TX_RINGSIZE);
adapter->cmd_buf_arr = cmd_buf_arr;
for (ctx = 0; ctx < MAX_RCV_CTX; ctx++) {
recv_ctx = &adapter->recv_ctx[ctx];
for (ring = 0; ring < adapter->max_rds_rings; ring++) {
rds_ring = &recv_ctx->rds_rings[ring];
switch (RCV_DESC_TYPE(ring)) {
case RCV_DESC_NORMAL:
rds_ring->max_rx_desc_count =
adapter->max_rx_desc_count;
rds_ring->flags = RCV_DESC_NORMAL;
if (adapter->ahw.cut_through) {
rds_ring->dma_size =
NX_CT_DEFAULT_RX_BUF_LEN;
rds_ring->skb_size =
NX_CT_DEFAULT_RX_BUF_LEN;
} else {
rds_ring->dma_size = RX_DMA_MAP_LEN;
rds_ring->skb_size =
MAX_RX_BUFFER_LENGTH;
}
break;
case RCV_DESC_JUMBO:
rds_ring->max_rx_desc_count =
adapter->max_jumbo_rx_desc_count;
rds_ring->flags = RCV_DESC_JUMBO;
if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
rds_ring->dma_size =
NX_P3_RX_JUMBO_BUF_MAX_LEN;
else
rds_ring->dma_size =
NX_P2_RX_JUMBO_BUF_MAX_LEN;
rds_ring->skb_size =
rds_ring->dma_size + NET_IP_ALIGN;
break;
case RCV_RING_LRO:
rds_ring->max_rx_desc_count =
adapter->max_lro_rx_desc_count;
rds_ring->flags = RCV_DESC_LRO;
rds_ring->dma_size = RX_LRO_DMA_MAP_LEN;
rds_ring->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
break;
}
rds_ring->rx_buf_arr = (struct netxen_rx_buffer *)
vmalloc(RCV_BUFFSIZE);
if (rds_ring->rx_buf_arr == NULL) {
printk(KERN_ERR "%s: Failed to allocate "
"rx buffer ring %d\n",
netdev->name, ring);
/* free whatever was already allocated */
goto err_out;
}
memset(rds_ring->rx_buf_arr, 0, RCV_BUFFSIZE);
INIT_LIST_HEAD(&rds_ring->free_list);
rds_ring->begin_alloc = 0;
/*
* Now go through all of them, set reference handles
* and put them in the queues.
*/
num_rx_bufs = rds_ring->max_rx_desc_count;
rx_buf = rds_ring->rx_buf_arr;
for (i = 0; i < num_rx_bufs; i++) {
list_add_tail(&rx_buf->list,
&rds_ring->free_list);
rx_buf->ref_handle = i;
rx_buf->state = NETXEN_BUFFER_FREE;
rx_buf++;
}
}
}
return 0;
err_out:
netxen_free_sw_resources(adapter);
return -ENOMEM;
}
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->macaddr_set = netxen_niu_macaddr_set;
adapter->set_mtu = netxen_nic_set_mtu_gb;
adapter->set_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->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->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->stop_port = netxen_niu_disable_xg_port;
break;
default:
break;
}
if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
adapter->set_mtu = nx_fw_cmd_set_mtu;
adapter->set_promisc = netxen_p3_nic_set_promisc;
}
}
/*
* netxen_decode_crb_addr(0 - utility to translate from internal Phantom CRB
* address to external PCI CRB address.
*/
static 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;
#if 0
static long rom_write_timeout = 700;
#endif
static 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;
}
static 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;
}
#if 0
static 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 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 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);
}
#endif
static void netxen_rom_unlock(struct netxen_adapter *adapter)
{
u32 val;
/* release semaphore2 */
netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(PCIE_SEM2_UNLOCK), &val);
}
#if 0
static 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 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);
}
#endif
static int do_rom_fast_read(struct netxen_adapter *adapter,
int addr, int *valp)
{
cond_resched();
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 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) {
int v;
ret = do_rom_fast_read(adapter, addridx, &v);
if (ret != 0)
break;
*(__le32 *)bytes = cpu_to_le32(v);
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;
}
#if 0
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 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((*(__le32*)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;
}
static 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);
}
static 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(NETXEN_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, NETXEN_CRBINIT_START,
buffer, NETXEN_FLASH_SECTOR_SIZE);
if (ret != FLASH_SUCCESS)
goto out_kfree;
ret = netxen_rom_fast_write_words(adapter, NETXEN_FIXED_START,
buffer, NETXEN_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;
}
static 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);
}
static void check_erased_flash(struct netxen_adapter *adapter, int addr)
{
int i;
int val;
int count = 0, erased_errors = 0;
int range;
range = (addr == NETXEN_USER_START) ?
NETXEN_FIXED_START : addr + NETXEN_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;
}
static 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 * NETXEN_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 = NETXEN_SECONDARY_START / NETXEN_FLASH_SECTOR_SIZE;
end = NETXEN_USER_START / NETXEN_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 = NETXEN_PRIMARY_START / NETXEN_FLASH_SECTOR_SIZE;
end = NETXEN_SECONDARY_START / NETXEN_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;
}
#endif /* 0 */
#define NETXEN_BOARDTYPE 0x4008
#define NETXEN_BOARDNUM 0x400c
#define NETXEN_CHIPNUM 0x4010
int netxen_pinit_from_rom(struct netxen_adapter *adapter, int verbose)
{
int addr, val;
int i, init_delay = 0;
struct crb_addr_pair *buf;
unsigned offset, n;
u32 off;
/* resetall */
netxen_crb_writelit_adapter(adapter, NETXEN_ROMUSB_GLB_SW_RESET,
0xffffffff);
if (verbose) {
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 (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
if (netxen_rom_fast_read(adapter, 0, &n) != 0 ||
(n != 0xcafecafeUL) ||
netxen_rom_fast_read(adapter, 4, &n) != 0) {
printk(KERN_ERR "%s: ERROR Reading crb_init area: "
"n: %08x\n", netxen_nic_driver_name, n);
return -EIO;
}
offset = n & 0xffffU;
n = (n >> 16) & 0xffffU;
} else {
if (netxen_rom_fast_read(adapter, 0, &n) != 0 ||
!(n & 0x80000000)) {
printk(KERN_ERR "%s: ERROR Reading crb_init area: "
"n: %08x\n", netxen_nic_driver_name, n);
return -EIO;
}
offset = 1;
n &= ~0x80000000;
}
if (n < 1024) {
if (verbose)
printk(KERN_DEBUG "%s: %d CRB init values found"
" in ROM.\n", netxen_nic_driver_name, n);
} else {
printk(KERN_ERR "%s:n=0x%x Error! NetXen card flash not"
" initialized.\n", __func__, 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*offset, &val) != 0 ||
netxen_rom_fast_read(adapter, 8*i + 4*offset + 4, &addr) != 0)
return -EIO;
buf[i].addr = addr;
buf[i].data = val;
if (verbose)
printk(KERN_DEBUG "%s: PCI: 0x%08x == 0x%08x\n",
netxen_nic_driver_name,
(u32)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;
if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
/* do not reset PCI */
if (off == (ROMUSB_GLB + 0xbc))
continue;
if (off == (NETXEN_CRB_PEG_NET_1 + 0x18))
buf[i].data = 0x1020;
/* skip the function enable register */
if (off == NETXEN_PCIE_REG(PCIE_SETUP_FUNCTION))
continue;
if (off == NETXEN_PCIE_REG(PCIE_SETUP_FUNCTION2))
continue;
if ((off & 0x0ff00000) == NETXEN_CRB_SMB)
continue;
}
if (off == NETXEN_ADDR_ERROR) {
printk(KERN_ERR "%s: Err: Unknown addr: 0x%08x\n",
netxen_nic_driver_name, buf[i].addr);
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;
if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
/* hold xdma in reset also */
buf[i].data = NETXEN_NIC_XDMA_RESET;
}
}
adapter->hw_write_wx(adapter, off, &buf[i].data, 4);
if (init_delay == 1) {
msleep(1000);
init_delay = 0;
}
msleep(1);
}
kfree(buf);
/* disable_peg_cache_all */
/* unreset_net_cache */
if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
adapter->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->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",
__func__);
return -ENOMEM;
}
addr = (uint64_t) adapter->dummy_dma.phys_addr;
hi = (addr >> 32) & 0xffffffff;
lo = addr & 0xffffffff;
adapter->pci_write_normalize(adapter, CRB_HOST_DUMMY_BUF_ADDR_HI, hi);
adapter->pci_write_normalize(adapter, CRB_HOST_DUMMY_BUF_ADDR_LO, lo);
if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
uint32_t temp = 0;
adapter->hw_write_wx(adapter, CRB_HOST_DUMMY_BUF, &temp, 4);
}
return 0;
}
void netxen_free_adapter_offload(struct netxen_adapter *adapter)
{
int i = 100;
if (!adapter->dummy_dma.addr)
return;
if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
do {
if (dma_watchdog_shutdown_request(adapter) == 1)
break;
msleep(50);
if (dma_watchdog_shutdown_poll_result(adapter) == 1)
break;
} while (--i);
}
if (i) {
pci_free_consistent(adapter->pdev,
NETXEN_HOST_DUMMY_DMA_SIZE,
adapter->dummy_dma.addr,
adapter->dummy_dma.phys_addr);
adapter->dummy_dma.addr = NULL;
} else {
printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
adapter->netdev->name);
}
}
int netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val)
{
u32 val = 0;
int retries = 60;
if (!pegtune_val) {
do {
val = adapter->pci_read_normalize(adapter,
CRB_CMDPEG_STATE);
if (val == PHAN_INITIALIZE_COMPLETE ||
val == PHAN_INITIALIZE_ACK)
return 0;
msleep(500);
} while (--retries);
if (!retries) {
pegtune_val = adapter->pci_read_normalize(adapter,
NETXEN_ROMUSB_GLB_PEGTUNE_DONE);
printk(KERN_WARNING "netxen_phantom_init: init failed, "
"pegtune_val=%x\n", pegtune_val);
return -1;
}
}
return 0;
}
int netxen_receive_peg_ready(struct netxen_adapter *adapter)
{
u32 val = 0;
int retries = 2000;
do {
val = adapter->pci_read_normalize(adapter, CRB_RCVPEG_STATE);
if (val == PHAN_PEG_RCV_INITIALIZED)
return 0;
msleep(10);
} while (--retries);
if (!retries) {
printk(KERN_ERR "Receive Peg initialization not "
"complete, state: 0x%x.\n", val);
return -EIO;
}
return 0;
}
static struct sk_buff *netxen_process_rxbuf(struct netxen_adapter *adapter,
struct nx_host_rds_ring *rds_ring, u16 index, u16 cksum)
{
struct netxen_rx_buffer *buffer;
struct sk_buff *skb;
buffer = &rds_ring->rx_buf_arr[index];
pci_unmap_single(adapter->pdev, buffer->dma, rds_ring->dma_size,
PCI_DMA_FROMDEVICE);
skb = buffer->skb;
if (!skb)
goto no_skb;
if (likely(adapter->rx_csum && cksum == STATUS_CKSUM_OK)) {
adapter->stats.csummed++;
skb->ip_summed = CHECKSUM_UNNECESSARY;
} else
skb->ip_summed = CHECKSUM_NONE;
skb->dev = adapter->netdev;
buffer->skb = NULL;
no_skb:
buffer->state = NETXEN_BUFFER_FREE;
buffer->lro_current_frags = 0;
buffer->lro_expected_frags = 0;
list_add_tail(&buffer->list, &rds_ring->free_list);
return skb;
}
/*
* 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...
*/
static void netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
struct status_desc *desc, struct status_desc *frag_desc)
{
struct net_device *netdev = adapter->netdev;
u64 sts_data = le64_to_cpu(desc->status_desc_data);
int index = netxen_get_sts_refhandle(sts_data);
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(sts_data);
u32 desc_ctx;
u16 pkt_offset = 0, cksum;
struct nx_host_rds_ring *rds_ring;
desc_ctx = netxen_get_sts_type(sts_data);
if (unlikely(desc_ctx >= NUM_RCV_DESC_RINGS)) {
printk("%s: %s Bad Rcv descriptor ring\n",
netxen_nic_driver_name, netdev->name);
return;
}
rds_ring = &recv_ctx->rds_rings[desc_ctx];
if (unlikely(index > rds_ring->max_rx_desc_count)) {
DPRINTK(ERR, "Got a buffer index:%x Max is %x\n",
index, rds_ring->max_rx_desc_count);
return;
}
buffer = &rds_ring->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;
}
}
cksum = netxen_get_sts_status(sts_data);
skb = netxen_process_rxbuf(adapter, rds_ring, index, cksum);
if (!skb)
return;
if (desc_ctx == RCV_DESC_LRO_CTXID) {
/* True length was only available on the last pkt */
skb_put(skb, buffer->lro_length);
} else {
if (length > rds_ring->skb_size)
skb_put(skb, rds_ring->skb_size);
else
skb_put(skb, length);
pkt_offset = netxen_get_sts_pkt_offset(sts_data);
if (pkt_offset)
skb_pull(skb, pkt_offset);
}
skb->protocol = eth_type_trans(skb, netdev);
/*
* rx buffer chaining is disabled, walk and free
* any spurious rx buffer chain.
*/
if (frag_desc) {
u16 i, nr_frags = desc->nr_frags;
dev_kfree_skb_any(skb);
for (i = 0; i < nr_frags; i++) {
index = frag_desc->frag_handles[i];
skb = netxen_process_rxbuf(adapter,
rds_ring, index, cksum);
if (skb)
dev_kfree_skb_any(skb);
}
adapter->stats.rxdropped++;
} else {
netif_receive_skb(skb);
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, *frag_desc;
u32 consumer = recv_ctx->status_rx_consumer;
int count = 0, ring;
u64 sts_data;
u16 opcode;
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;
}
sts_data = le64_to_cpu(desc->status_desc_data);
opcode = netxen_get_sts_opcode(sts_data);
frag_desc = NULL;
if (opcode == NETXEN_NIC_RXPKT_DESC) {
if (desc->nr_frags) {
consumer = get_next_index(consumer,
adapter->max_rx_desc_count);
frag_desc = &desc_head[consumer];
netxen_set_sts_owner(frag_desc,
STATUS_OWNER_PHANTOM);
}
}
netxen_process_rcv(adapter, ctxid, desc, frag_desc);
netxen_set_sts_owner(desc, STATUS_OWNER_PHANTOM);
consumer = get_next_index(consumer,
adapter->max_rx_desc_count);
count++;
}
for (ring = 0; ring < adapter->max_rds_rings; ring++)
netxen_post_rx_buffers_nodb(adapter, ctxid, ring);
/* update the consumer index in phantom */
if (count) {
recv_ctx->status_rx_consumer = consumer;
/* Window = 1 */
adapter->pci_write_normalize(adapter,
recv_ctx->crb_sts_consumer, consumer);
}
return count;
}
/* Process Command status ring */
int netxen_process_cmd_ring(struct netxen_adapter *adapter)
{
u32 last_consumer, consumer;
int count = 0, i;
struct netxen_cmd_buffer *buffer;
struct pci_dev *pdev = adapter->pdev;
struct net_device *netdev = adapter->netdev;
struct netxen_skb_frag *frag;
int done = 0;
last_consumer = adapter->last_cmd_consumer;
consumer = le32_to_cpu(*(adapter->cmd_consumer));
while (last_consumer != consumer) {
buffer = &adapter->cmd_buf_arr[last_consumer];
if (buffer->skb) {
frag = &buffer->frag_array[0];
pci_unmap_single(pdev, frag->dma, frag->length,
PCI_DMA_TODEVICE);
frag->dma = 0ULL;
for (i = 1; i < buffer->frag_count; i++) {
frag++; /* Get the next frag */
pci_unmap_page(pdev, frag->dma, frag->length,
PCI_DMA_TODEVICE);
frag->dma = 0ULL;
}
adapter->stats.xmitfinished++;
dev_kfree_skb_any(buffer->skb);
buffer->skb = NULL;
}
last_consumer = get_next_index(last_consumer,
adapter->max_tx_desc_count);
if (++count >= MAX_STATUS_HANDLE)
break;
}
if (count) {
adapter->last_cmd_consumer = last_consumer;
smp_mb();
if (netif_queue_stopped(netdev) && netif_running(netdev)) {
netif_tx_lock(netdev);
netif_wake_queue(netdev);
smp_mb();
netif_tx_unlock(netdev);
}
}
/*
* 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.
*/
consumer = le32_to_cpu(*(adapter->cmd_consumer));
done = (last_consumer == consumer);
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->pdev;
struct sk_buff *skb;
struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctx]);
struct nx_host_rds_ring *rds_ring = 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;
struct list_head *head;
rds_ring = &recv_ctx->rds_rings[ringid];
producer = rds_ring->producer;
index = rds_ring->begin_alloc;
head = &rds_ring->free_list;
/* We can start writing rx descriptors into the phantom memory. */
while (!list_empty(head)) {
skb = dev_alloc_skb(rds_ring->skb_size);
if (unlikely(!skb)) {
rds_ring->begin_alloc = index;
break;
}
buffer = list_entry(head->next, struct netxen_rx_buffer, list);
list_del(&buffer->list);
count++; /* now there should be no failure */
pdesc = &rds_ring->desc_head[producer];
if (!adapter->ahw.cut_through)
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, rds_ring->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(rds_ring->dma_size);
DPRINTK(INFO, "done writing descripter\n");
producer =
get_next_index(producer, rds_ring->max_rx_desc_count);
index = get_next_index(index, rds_ring->max_rx_desc_count);
}
/* if we did allocate buffers, then write the count to Phantom */
if (count) {
rds_ring->begin_alloc = index;
rds_ring->producer = producer;
/* Window = 1 */
adapter->pci_write_normalize(adapter,
rds_ring->crb_rcv_producer,
(producer-1) & (rds_ring->max_rx_desc_count-1));
if (adapter->fw_major < 4) {
/*
* Write a doorbell msg to tell phanmon of change in
* receive ring producer
* Only for firmware version < 4.0.0
*/
netxen_set_msg_peg_id(msg, NETXEN_RCV_PEG_DB_ID);
netxen_set_msg_privid(msg);
netxen_set_msg_count(msg,
((producer -
1) & (rds_ring->
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));
}
}
}
static void netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter,
uint32_t ctx, uint32_t ringid)
{
struct pci_dev *pdev = adapter->pdev;
struct sk_buff *skb;
struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctx]);
struct nx_host_rds_ring *rds_ring = NULL;
u32 producer;
struct rcv_desc *pdesc;
struct netxen_rx_buffer *buffer;
int count = 0;
int index = 0;
struct list_head *head;
rds_ring = &recv_ctx->rds_rings[ringid];
producer = rds_ring->producer;
index = rds_ring->begin_alloc;
head = &rds_ring->free_list;
/* We can start writing rx descriptors into the phantom memory. */
while (!list_empty(head)) {
skb = dev_alloc_skb(rds_ring->skb_size);
if (unlikely(!skb)) {
rds_ring->begin_alloc = index;
break;
}
buffer = list_entry(head->next, struct netxen_rx_buffer, list);
list_del(&buffer->list);
count++; /* now there should be no failure */
pdesc = &rds_ring->desc_head[producer];
if (!adapter->ahw.cut_through)
skb_reserve(skb, 2);
buffer->skb = skb;
buffer->state = NETXEN_BUFFER_BUSY;
buffer->dma = pci_map_single(pdev, skb->data,
rds_ring->dma_size,
PCI_DMA_FROMDEVICE);
/* make a rcv descriptor */
pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
pdesc->addr_buffer = cpu_to_le64(buffer->dma);
producer =
get_next_index(producer, rds_ring->max_rx_desc_count);
index = get_next_index(index, rds_ring->max_rx_desc_count);
buffer = &rds_ring->rx_buf_arr[index];
}
/* if we did allocate buffers, then write the count to Phantom */
if (count) {
rds_ring->begin_alloc = index;
rds_ring->producer = producer;
/* Window = 1 */
adapter->pci_write_normalize(adapter,
rds_ring->crb_rcv_producer,
(producer-1) & (rds_ring->max_rx_desc_count-1));
wmb();
}
}
void netxen_nic_clear_stats(struct netxen_adapter *adapter)
{
memset(&adapter->stats, 0, sizeof(adapter->stats));
return;
}
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