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u-boot/board/prodrive/p3mx/mv_eth.c
Wolfgang Denk 8d9a8610b8 Code cleanup. Update CHANGELOG.
2006-11-30 01:54:07 +01:00

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/*
* (C) Copyright 2003
* Ingo Assmus <ingo.assmus@keymile.com>
*
* based on - Driver for MV64460X ethernet ports
* Copyright (C) 2002 rabeeh@galileo.co.il
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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
3 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
*/
/*
* mv_eth.c - header file for the polled mode GT ethernet driver
*/
#include <common.h>
#include <net.h>
#include <malloc.h>
#include <miiphy.h>
#include "mv_eth.h"
/* enable Debug outputs */
#undef DEBUG_MV_ETH
#ifdef DEBUG_MV_ETH
#define DEBUG
#define DP(x) x
#else
#define DP(x)
#endif
/* PHY DFCDL Registers */
#define ETH_PHY_DFCDL_CONFIG0_REG 0x2100
#define ETH_PHY_DFCDL_CONFIG1_REG 0x2104
#define ETH_PHY_DFCDL_ADDR_REG 0x2110
#define ETH_PHY_DFCDL_DATA0_REG 0x2114
#define PHY_AUTONEGOTIATE_TIMEOUT 4000 /* 4000 ms autonegotiate timeout */
#define PHY_UPDATE_TIMEOUT 10000
#undef MV64460_CHECKSUM_OFFLOAD
/*************************************************************************
* The first part is the high level driver of the gigE ethernet ports. *
*************************************************************************/
/* Definition for configuring driver */
/* #define UPDATE_STATS_BY_SOFTWARE */
#undef MV64460_RX_QUEUE_FILL_ON_TASK
/* Constants */
#define MAGIC_ETH_RUNNING 8031971
#define MV64460_INTERNAL_SRAM_SIZE _256K
#define EXTRA_BYTES 32
#define WRAP ETH_HLEN + 2 + 4 + 16
#define BUFFER_MTU dev->mtu + WRAP
#define INT_CAUSE_UNMASK_ALL 0x0007ffff
#define INT_CAUSE_UNMASK_ALL_EXT 0x0011ffff
#ifdef MV64460_RX_FILL_ON_TASK
#define INT_CAUSE_MASK_ALL 0x00000000
#define INT_CAUSE_CHECK_BITS INT_CAUSE_UNMASK_ALL
#define INT_CAUSE_CHECK_BITS_EXT INT_CAUSE_UNMASK_ALL_EXT
#endif
/* Read/Write to/from MV64460 internal registers */
#define MV_REG_READ(offset) my_le32_to_cpu(* (volatile unsigned int *) (INTERNAL_REG_BASE_ADDR + offset))
#define MV_REG_WRITE(offset,data) *(volatile unsigned int *) (INTERNAL_REG_BASE_ADDR + offset) = my_cpu_to_le32 (data)
#define MV_SET_REG_BITS(regOffset,bits) ((*((volatile unsigned int*)((INTERNAL_REG_BASE_ADDR) + (regOffset)))) |= ((unsigned int)my_cpu_to_le32(bits)))
#define MV_RESET_REG_BITS(regOffset,bits) ((*((volatile unsigned int*)((INTERNAL_REG_BASE_ADDR) + (regOffset)))) &= ~((unsigned int)my_cpu_to_le32(bits)))
#define my_cpu_to_le32(x) my_le32_to_cpu((x))
/* Static function declarations */
static int mv64460_eth_real_open (struct eth_device *eth);
static int mv64460_eth_real_stop (struct eth_device *eth);
static struct net_device_stats *mv64460_eth_get_stats (struct eth_device
*dev);
static void eth_port_init_mac_tables (ETH_PORT eth_port_num);
static void mv64460_eth_update_stat (struct eth_device *dev);
bool db64460_eth_start (struct eth_device *eth);
unsigned int eth_read_mib_counter (ETH_PORT eth_port_num,
unsigned int mib_offset);
int mv64460_eth_receive (struct eth_device *dev);
int mv64460_eth_xmit (struct eth_device *, volatile void *packet, int length);
int mv_miiphy_read(char *devname, unsigned char phy_addr,
unsigned char phy_reg, unsigned short *value);
int mv_miiphy_write(char *devname, unsigned char phy_addr,
unsigned char phy_reg, unsigned short value);
int phy_setup_aneg (char *devname, unsigned char addr);
#ifndef UPDATE_STATS_BY_SOFTWARE
static void mv64460_eth_print_stat (struct eth_device *dev);
#endif
/* Processes a received packet */
extern void NetReceive (volatile uchar *, int);
extern unsigned int INTERNAL_REG_BASE_ADDR;
unsigned long my_le32_to_cpu (unsigned long x)
{
return (((x & 0x000000ffU) << 24) |
((x & 0x0000ff00U) << 8) |
((x & 0x00ff0000U) >> 8) | ((x & 0xff000000U) >> 24));
}
/*************************************************
*Helper functions - used inside the driver only *
*************************************************/
#ifdef DEBUG_MV_ETH
void print_globals (struct eth_device *dev)
{
printf ("Ethernet PRINT_Globals-Debug function\n");
printf ("Base Address for ETH_PORT_INFO: %08x\n",
(unsigned int) dev->priv);
printf ("Base Address for mv64460_eth_priv: %08x\n",
(unsigned int) &(((ETH_PORT_INFO *) dev->priv)->
port_private));
printf ("GT Internal Base Address: %08x\n",
INTERNAL_REG_BASE_ADDR);
printf ("Base Address for TX-DESCs: %08x Number of allocated Buffers %d\n",
(unsigned int) ((ETH_PORT_INFO *) dev->priv)->p_tx_desc_area_base[0], MV64460_TX_QUEUE_SIZE);
printf ("Base Address for RX-DESCs: %08x Number of allocated Buffers %d\n",
(unsigned int) ((ETH_PORT_INFO *) dev->priv)->p_rx_desc_area_base[0], MV64460_RX_QUEUE_SIZE);
printf ("Base Address for RX-Buffer: %08x allocated Bytes %d\n",
(unsigned int) ((ETH_PORT_INFO *) dev->priv)->
p_rx_buffer_base[0],
(MV64460_RX_QUEUE_SIZE * MV64460_RX_BUFFER_SIZE) + 32);
printf ("Base Address for TX-Buffer: %08x allocated Bytes %d\n",
(unsigned int) ((ETH_PORT_INFO *) dev->priv)->
p_tx_buffer_base[0],
(MV64460_TX_QUEUE_SIZE * MV64460_TX_BUFFER_SIZE) + 32);
}
#endif
/**********************************************************************
* mv64460_eth_print_phy_status
*
* Prints gigabit ethenret phy status
*
* Input : pointer to ethernet interface network device structure
* Output : N/A
**********************************************************************/
void mv64460_eth_print_phy_status (struct eth_device *dev)
{
struct mv64460_eth_priv *port_private;
unsigned int port_num;
ETH_PORT_INFO *ethernet_private = (ETH_PORT_INFO *) dev->priv;
unsigned int port_status, phy_reg_data;
port_private =
(struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
/* Check Link status on phy */
eth_port_read_smi_reg (port_num, 1, &phy_reg_data);
if (!(phy_reg_data & 0x20)) {
printf ("Ethernet port changed link status to DOWN\n");
} else {
port_status =
MV_REG_READ (MV64460_ETH_PORT_STATUS_REG (port_num));
printf ("Ethernet status port %d: Link up", port_num);
printf (", %s",
(port_status & BIT2) ? "Full Duplex" : "Half Duplex");
if (port_status & BIT4)
printf (", Speed 1 Gbps");
else
printf (", %s",
(port_status & BIT5) ? "Speed 100 Mbps" :
"Speed 10 Mbps");
printf ("\n");
}
}
/**********************************************************************
* u-boot entry functions for mv64460_eth
*
**********************************************************************/
int db64460_eth_probe (struct eth_device *dev)
{
return ((int) db64460_eth_start (dev));
}
int db64460_eth_poll (struct eth_device *dev)
{
return mv64460_eth_receive (dev);
}
int db64460_eth_transmit (struct eth_device *dev, volatile void *packet,
int length)
{
mv64460_eth_xmit (dev, packet, length);
return 0;
}
void db64460_eth_disable (struct eth_device *dev)
{
mv64460_eth_stop (dev);
}
#define DFCDL(write,read) ((write << 6) | read)
unsigned int ethDfcdls[] = {
DFCDL(0,0), DFCDL(1,1), DFCDL(2,2), DFCDL(3,3),
DFCDL(4,4), DFCDL(5,5), DFCDL(6,6), DFCDL(7,7),
DFCDL(8,8), DFCDL(9,9), DFCDL(10,10), DFCDL(11,11),
DFCDL(12,12), DFCDL(13,13), DFCDL(14,14), DFCDL(15,15),
DFCDL(16,16), DFCDL(17,17), DFCDL(18,18), DFCDL(19,19),
DFCDL(20,20), DFCDL(21,21), DFCDL(22,22), DFCDL(23,23),
DFCDL(24,24), DFCDL(25,25), DFCDL(26,26), DFCDL(27,27),
DFCDL(28,28), DFCDL(29,29), DFCDL(30,30), DFCDL(31,31),
DFCDL(32,32), DFCDL(33,33), DFCDL(34,34), DFCDL(35,35),
DFCDL(36,36), DFCDL(37,37), DFCDL(38,38), DFCDL(39,39),
DFCDL(40,40), DFCDL(41,41), DFCDL(42,42), DFCDL(43,43),
DFCDL(44,44), DFCDL(45,45), DFCDL(46,46), DFCDL(47,47),
DFCDL(48,48), DFCDL(49,49), DFCDL(50,50), DFCDL(51,51),
DFCDL(52,52), DFCDL(53,53), DFCDL(54,54), DFCDL(55,55),
DFCDL(56,56), DFCDL(57,57), DFCDL(58,58), DFCDL(59,59),
DFCDL(60,60), DFCDL(61,61), DFCDL(62,62), DFCDL(63,63),
};
void mv_eth_phy_init (void)
{
int i;
MV_REG_WRITE (ETH_PHY_DFCDL_ADDR_REG, 0);
for (i = 0; i < 64; i++) {
MV_REG_WRITE (ETH_PHY_DFCDL_DATA0_REG, ethDfcdls[i]);
}
MV_REG_WRITE (ETH_PHY_DFCDL_CONFIG0_REG, 0x300000);
}
void mv6446x_eth_initialize (bd_t * bis)
{
struct eth_device *dev;
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
int devnum, x, temp;
char *s, *e, buf[64];
/* P3M750 only
* Set RGMII clock drives strength
*/
temp = MV_REG_READ(0x20A0);
temp |= 0x04000080;
MV_REG_WRITE(0x20A0, temp);
mv_eth_phy_init();
for (devnum = 0; devnum < MV_ETH_DEVS; devnum++) {
dev = calloc (sizeof (*dev), 1);
if (!dev) {
printf ("%s: mv_enet%d allocation failure, %s\n",
__FUNCTION__, devnum, "eth_device structure");
return;
}
/* must be less than NAMESIZE (16) */
sprintf (dev->name, "mv_enet%d", devnum);
#ifdef DEBUG
printf ("Initializing %s\n", dev->name);
#endif
/* Extract the MAC address from the environment */
switch (devnum) {
case 0:
s = "ethaddr";
break;
case 1:
s = "eth1addr";
break;
case 2:
s = "eth2addr";
break;
default: /* this should never happen */
printf ("%s: Invalid device number %d\n",
__FUNCTION__, devnum);
return;
}
temp = getenv_r (s, buf, sizeof (buf));
s = (temp > 0) ? buf : NULL;
#ifdef DEBUG
printf ("Setting MAC %d to %s\n", devnum, s);
#endif
for (x = 0; x < 6; ++x) {
dev->enetaddr[x] = s ? simple_strtoul (s, &e, 16) : 0;
if (s)
s = (*e) ? e + 1 : e;
}
/* ronen - set the MAC addr in the HW */
eth_port_uc_addr_set (devnum, dev->enetaddr, 0);
dev->init = (void *) db64460_eth_probe;
dev->halt = (void *) ethernet_phy_reset;
dev->send = (void *) db64460_eth_transmit;
dev->recv = (void *) db64460_eth_poll;
ethernet_private = calloc (sizeof (*ethernet_private), 1);
dev->priv = (void *)ethernet_private;
if (!ethernet_private) {
printf ("%s: %s allocation failure, %s\n",
__FUNCTION__, dev->name,
"Private Device Structure");
free (dev);
return;
}
/* start with an zeroed ETH_PORT_INFO */
memset (ethernet_private, 0, sizeof (ETH_PORT_INFO));
memcpy (ethernet_private->port_mac_addr, dev->enetaddr, 6);
/* set pointer to memory for stats data structure etc... */
port_private = calloc (sizeof (*ethernet_private), 1);
ethernet_private->port_private = (void *)port_private;
if (!port_private) {
printf ("%s: %s allocation failure, %s\n",
__FUNCTION__, dev->name,
"Port Private Device Structure");
free (ethernet_private);
free (dev);
return;
}
port_private->stats =
calloc (sizeof (struct net_device_stats), 1);
if (!port_private->stats) {
printf ("%s: %s allocation failure, %s\n",
__FUNCTION__, dev->name,
"Net stat Structure");
free (port_private);
free (ethernet_private);
free (dev);
return;
}
memset (ethernet_private->port_private, 0,
sizeof (struct mv64460_eth_priv));
switch (devnum) {
case 0:
ethernet_private->port_num = ETH_0;
break;
case 1:
ethernet_private->port_num = ETH_1;
break;
case 2:
ethernet_private->port_num = ETH_2;
break;
default:
printf ("Invalid device number %d\n", devnum);
break;
};
port_private->port_num = devnum;
/*
* Read MIB counter on the GT in order to reset them,
* then zero all the stats fields in memory
*/
mv64460_eth_update_stat (dev);
memset (port_private->stats, 0,
sizeof (struct net_device_stats));
/* Extract the MAC address from the environment */
switch (devnum) {
case 0:
s = "ethaddr";
break;
case 1:
s = "eth1addr";
break;
case 2:
s = "eth2addr";
break;
default: /* this should never happen */
printf ("%s: Invalid device number %d\n",
__FUNCTION__, devnum);
return;
}
temp = getenv_r (s, buf, sizeof (buf));
s = (temp > 0) ? buf : NULL;
#ifdef DEBUG
printf ("Setting MAC %d to %s\n", devnum, s);
#endif
for (x = 0; x < 6; ++x) {
dev->enetaddr[x] = s ? simple_strtoul (s, &e, 16) : 0;
if (s)
s = (*e) ? e + 1 : e;
}
DP (printf ("Allocating descriptor and buffer rings\n"));
ethernet_private->p_rx_desc_area_base[0] =
(ETH_RX_DESC *) memalign (16,
RX_DESC_ALIGNED_SIZE *
MV64460_RX_QUEUE_SIZE + 1);
ethernet_private->p_tx_desc_area_base[0] =
(ETH_TX_DESC *) memalign (16,
TX_DESC_ALIGNED_SIZE *
MV64460_TX_QUEUE_SIZE + 1);
ethernet_private->p_rx_buffer_base[0] =
(char *) memalign (16,
MV64460_RX_QUEUE_SIZE *
MV64460_TX_BUFFER_SIZE + 1);
ethernet_private->p_tx_buffer_base[0] =
(char *) memalign (16,
MV64460_RX_QUEUE_SIZE *
MV64460_TX_BUFFER_SIZE + 1);
#ifdef DEBUG_MV_ETH
/* DEBUG OUTPUT prints adresses of globals */
print_globals (dev);
#endif
eth_register (dev);
miiphy_register(dev->name, mv_miiphy_read, mv_miiphy_write);
}
DP (printf ("%s: exit\n", __FUNCTION__));
}
/**********************************************************************
* mv64460_eth_open
*
* This function is called when openning the network device. The function
* should initialize all the hardware, initialize cyclic Rx/Tx
* descriptors chain and buffers and allocate an IRQ to the network
* device.
*
* Input : a pointer to the network device structure
* / / ronen - changed the output to match net/eth.c needs
* Output : nonzero of success , zero if fails.
* under construction
**********************************************************************/
int mv64460_eth_open (struct eth_device *dev)
{
return (mv64460_eth_real_open (dev));
}
/* Helper function for mv64460_eth_open */
static int mv64460_eth_real_open (struct eth_device *dev)
{
unsigned int queue;
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
unsigned int port_num;
u32 port_status;
ushort reg_short;
int speed;
int duplex;
int i;
int reg;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
/* ronen - when we update the MAC env params we only update dev->enetaddr
see ./net/eth.c eth_set_enetaddr() */
memcpy (ethernet_private->port_mac_addr, dev->enetaddr, 6);
port_private = (struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
/* Stop RX Queues */
MV_REG_WRITE (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG (port_num), 0x0000ff00);
/* Clear the ethernet port interrupts */
MV_REG_WRITE (MV64460_ETH_INTERRUPT_CAUSE_REG (port_num), 0);
MV_REG_WRITE (MV64460_ETH_INTERRUPT_CAUSE_EXTEND_REG (port_num), 0);
/* Unmask RX buffer and TX end interrupt */
MV_REG_WRITE (MV64460_ETH_INTERRUPT_MASK_REG (port_num),
INT_CAUSE_UNMASK_ALL);
/* Unmask phy and link status changes interrupts */
MV_REG_WRITE (MV64460_ETH_INTERRUPT_EXTEND_MASK_REG (port_num),
INT_CAUSE_UNMASK_ALL_EXT);
/* Set phy address of the port */
ethernet_private->port_phy_addr = 0x1 + (port_num << 1);
reg = ethernet_private->port_phy_addr;
/* Activate the DMA channels etc */
eth_port_init (ethernet_private);
/* "Allocate" setup TX rings */
for (queue = 0; queue < MV64460_TX_QUEUE_NUM; queue++) {
unsigned int size;
port_private->tx_ring_size[queue] = MV64460_TX_QUEUE_SIZE;
size = (port_private->tx_ring_size[queue] * TX_DESC_ALIGNED_SIZE); /*size = no of DESCs times DESC-size */
ethernet_private->tx_desc_area_size[queue] = size;
/* first clear desc area completely */
memset ((void *) ethernet_private->p_tx_desc_area_base[queue],
0, ethernet_private->tx_desc_area_size[queue]);
/* initialize tx desc ring with low level driver */
if (ether_init_tx_desc_ring
(ethernet_private, ETH_Q0,
port_private->tx_ring_size[queue],
MV64460_TX_BUFFER_SIZE /* Each Buffer is 1600 Byte */ ,
(unsigned int) ethernet_private->
p_tx_desc_area_base[queue],
(unsigned int) ethernet_private->
p_tx_buffer_base[queue]) == false)
printf ("### Error initializing TX Ring\n");
}
/* "Allocate" setup RX rings */
for (queue = 0; queue < MV64460_RX_QUEUE_NUM; queue++) {
unsigned int size;
/* Meantime RX Ring are fixed - but must be configurable by user */
port_private->rx_ring_size[queue] = MV64460_RX_QUEUE_SIZE;
size = (port_private->rx_ring_size[queue] *
RX_DESC_ALIGNED_SIZE);
ethernet_private->rx_desc_area_size[queue] = size;
/* first clear desc area completely */
memset ((void *) ethernet_private->p_rx_desc_area_base[queue],
0, ethernet_private->rx_desc_area_size[queue]);
if ((ether_init_rx_desc_ring
(ethernet_private, ETH_Q0,
port_private->rx_ring_size[queue],
MV64460_RX_BUFFER_SIZE /* Each Buffer is 1600 Byte */ ,
(unsigned int) ethernet_private->
p_rx_desc_area_base[queue],
(unsigned int) ethernet_private->
p_rx_buffer_base[queue])) == false)
printf ("### Error initializing RX Ring\n");
}
eth_port_start (ethernet_private);
/* Set maximum receive buffer to 9700 bytes */
MV_REG_WRITE (MV64460_ETH_PORT_SERIAL_CONTROL_REG (port_num),
(0x5 << 17) |
(MV_REG_READ
(MV64460_ETH_PORT_SERIAL_CONTROL_REG (port_num))
& 0xfff1ffff));
/*
* Set ethernet MTU for leaky bucket mechanism to 0 - this will
* disable the leaky bucket mechanism .
*/
MV_REG_WRITE (MV64460_ETH_MAXIMUM_TRANSMIT_UNIT (port_num), 0);
port_status = MV_REG_READ (MV64460_ETH_PORT_STATUS_REG (port_num));
#if defined(CONFIG_PHY_RESET)
/*
* Reset the phy, only if its the first time through
* otherwise, just check the speeds & feeds
*/
if (port_private->first_init == 0) {
port_private->first_init = 1;
ethernet_phy_reset (port_num);
/* Start/Restart autonegotiation */
phy_setup_aneg (dev->name, reg);
udelay (1000);
}
#endif /* defined(CONFIG_PHY_RESET) */
miiphy_read (dev->name, reg, PHY_BMSR, &reg_short);
/*
* Wait if PHY is capable of autonegotiation and autonegotiation is not complete
*/
if ((reg_short & PHY_BMSR_AUTN_ABLE)
&& !(reg_short & PHY_BMSR_AUTN_COMP)) {
puts ("Waiting for PHY auto negotiation to complete");
i = 0;
while (!(reg_short & PHY_BMSR_AUTN_COMP)) {
/*
* Timeout reached ?
*/
if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
puts (" TIMEOUT !\n");
break;
}
if ((i++ % 1000) == 0) {
putc ('.');
}
udelay (1000); /* 1 ms */
miiphy_read (dev->name, reg, PHY_BMSR, &reg_short);
}
puts (" done\n");
udelay (500000); /* another 500 ms (results in faster booting) */
}
speed = miiphy_speed (dev->name, reg);
duplex = miiphy_duplex (dev->name, reg);
printf ("ENET Speed is %d Mbps - %s duplex connection\n",
(int) speed, (duplex == HALF) ? "HALF" : "FULL");
port_private->eth_running = MAGIC_ETH_RUNNING;
return 1;
}
static int mv64460_eth_free_tx_rings (struct eth_device *dev)
{
unsigned int queue;
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
unsigned int port_num;
volatile ETH_TX_DESC *p_tx_curr_desc;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
port_private =
(struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
/* Stop Tx Queues */
MV_REG_WRITE (MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG (port_num),
0x0000ff00);
/* Free TX rings */
DP (printf ("Clearing previously allocated TX queues... "));
for (queue = 0; queue < MV64460_TX_QUEUE_NUM; queue++) {
/* Free on TX rings */
for (p_tx_curr_desc =
ethernet_private->p_tx_desc_area_base[queue];
((unsigned int) p_tx_curr_desc <= (unsigned int)
ethernet_private->p_tx_desc_area_base[queue] +
ethernet_private->tx_desc_area_size[queue]);
p_tx_curr_desc =
(ETH_TX_DESC *) ((unsigned int) p_tx_curr_desc +
TX_DESC_ALIGNED_SIZE)) {
/* this is inside for loop */
if (p_tx_curr_desc->return_info != 0) {
p_tx_curr_desc->return_info = 0;
DP (printf ("freed\n"));
}
}
DP (printf ("Done\n"));
}
return 0;
}
static int mv64460_eth_free_rx_rings (struct eth_device *dev)
{
unsigned int queue;
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
unsigned int port_num;
volatile ETH_RX_DESC *p_rx_curr_desc;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
port_private =
(struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
/* Stop RX Queues */
MV_REG_WRITE (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG (port_num),
0x0000ff00);
/* Free RX rings */
DP (printf ("Clearing previously allocated RX queues... "));
for (queue = 0; queue < MV64460_RX_QUEUE_NUM; queue++) {
/* Free preallocated skb's on RX rings */
for (p_rx_curr_desc =
ethernet_private->p_rx_desc_area_base[queue];
(((unsigned int) p_rx_curr_desc <
((unsigned int) ethernet_private->
p_rx_desc_area_base[queue] +
ethernet_private->rx_desc_area_size[queue])));
p_rx_curr_desc =
(ETH_RX_DESC *) ((unsigned int) p_rx_curr_desc +
RX_DESC_ALIGNED_SIZE)) {
if (p_rx_curr_desc->return_info != 0) {
p_rx_curr_desc->return_info = 0;
DP (printf ("freed\n"));
}
}
DP (printf ("Done\n"));
}
return 0;
}
/**********************************************************************
* mv64460_eth_stop
*
* This function is used when closing the network device.
* It updates the hardware,
* release all memory that holds buffers and descriptors and release the IRQ.
* Input : a pointer to the device structure
* Output : zero if success , nonzero if fails
*********************************************************************/
int mv64460_eth_stop (struct eth_device *dev)
{
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
unsigned int port_num;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
port_private =
(struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
/* Disable all gigE address decoder */
MV_REG_WRITE (MV64460_ETH_BASE_ADDR_ENABLE_REG, 0x3f);
DP (printf ("%s Ethernet stop called ... \n", __FUNCTION__));
mv64460_eth_real_stop (dev);
return 0;
};
/* Helper function for mv64460_eth_stop */
static int mv64460_eth_real_stop (struct eth_device *dev)
{
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
unsigned int port_num;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
port_private =
(struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
mv64460_eth_free_tx_rings (dev);
mv64460_eth_free_rx_rings (dev);
eth_port_reset (ethernet_private->port_num);
/* Disable ethernet port interrupts */
MV_REG_WRITE (MV64460_ETH_INTERRUPT_CAUSE_REG (port_num), 0);
MV_REG_WRITE (MV64460_ETH_INTERRUPT_CAUSE_EXTEND_REG (port_num), 0);
/* Mask RX buffer and TX end interrupt */
MV_REG_WRITE (MV64460_ETH_INTERRUPT_MASK_REG (port_num), 0);
/* Mask phy and link status changes interrupts */
MV_REG_WRITE (MV64460_ETH_INTERRUPT_EXTEND_MASK_REG (port_num), 0);
MV_RESET_REG_BITS (MV64460_CPU_INTERRUPT0_MASK_HIGH,
BIT0 << port_num);
/* Print Network statistics */
#ifndef UPDATE_STATS_BY_SOFTWARE
/*
* Print statistics (only if ethernet is running),
* then zero all the stats fields in memory
*/
if (port_private->eth_running == MAGIC_ETH_RUNNING) {
port_private->eth_running = 0;
mv64460_eth_print_stat (dev);
}
memset (port_private->stats, 0, sizeof (struct net_device_stats));
#endif
DP (printf ("\nEthernet stopped ... \n"));
return 0;
}
/**********************************************************************
* mv64460_eth_start_xmit
*
* This function is queues a packet in the Tx descriptor for
* required port.
*
* Input : skb - a pointer to socket buffer
* dev - a pointer to the required port
*
* Output : zero upon success
**********************************************************************/
int mv64460_eth_xmit (struct eth_device *dev, volatile void *dataPtr,
int dataSize)
{
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
unsigned int port_num;
PKT_INFO pkt_info;
ETH_FUNC_RET_STATUS status;
struct net_device_stats *stats;
ETH_FUNC_RET_STATUS release_result;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
port_private =
(struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
stats = port_private->stats;
/* Update packet info data structure */
pkt_info.cmd_sts = ETH_TX_FIRST_DESC | ETH_TX_LAST_DESC; /* DMA owned, first last */
pkt_info.byte_cnt = dataSize;
pkt_info.buf_ptr = (unsigned int) dataPtr;
pkt_info.return_info = 0;
status = eth_port_send (ethernet_private, ETH_Q0, &pkt_info);
if ((status == ETH_ERROR) || (status == ETH_QUEUE_FULL)) {
printf ("Error on transmitting packet ..");
if (status == ETH_QUEUE_FULL)
printf ("ETH Queue is full. \n");
if (status == ETH_QUEUE_LAST_RESOURCE)
printf ("ETH Queue: using last available resource. \n");
return 1;
}
/* Update statistics and start of transmittion time */
stats->tx_bytes += dataSize;
stats->tx_packets++;
/* Check if packet(s) is(are) transmitted correctly (release everything) */
do {
release_result =
eth_tx_return_desc (ethernet_private, ETH_Q0,
&pkt_info);
switch (release_result) {
case ETH_OK:
DP (printf ("descriptor released\n"));
if (pkt_info.cmd_sts & BIT0) {
printf ("Error in TX\n");
stats->tx_errors++;
}
break;
case ETH_RETRY:
DP (printf ("transmission still in process\n"));
break;
case ETH_ERROR:
printf ("routine can not access Tx desc ring\n");
break;
case ETH_END_OF_JOB:
DP (printf ("the routine has nothing to release\n"));
break;
default: /* should not happen */
break;
}
} while (release_result == ETH_OK);
return 0; /* success */
}
/**********************************************************************
* mv64460_eth_receive
*
* This function is forward packets that are received from the port's
* queues toward kernel core or FastRoute them to another interface.
*
* Input : dev - a pointer to the required interface
* max - maximum number to receive (0 means unlimted)
*
* Output : number of served packets
**********************************************************************/
int mv64460_eth_receive (struct eth_device *dev)
{
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
unsigned int port_num;
PKT_INFO pkt_info;
struct net_device_stats *stats;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
port_private = (struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
stats = port_private->stats;
while ((eth_port_receive (ethernet_private, ETH_Q0, &pkt_info) == ETH_OK)) {
#ifdef DEBUG_MV_ETH
if (pkt_info.byte_cnt != 0) {
printf ("%s: Received %d byte Packet @ 0x%x\n",
__FUNCTION__, pkt_info.byte_cnt,
pkt_info.buf_ptr);
if(pkt_info.buf_ptr != 0){
for(i=0; i < pkt_info.byte_cnt; i++){
if((i % 4) == 0){
printf("\n0x");
}
printf("%02x", ((char*)pkt_info.buf_ptr)[i]);
}
printf("\n");
}
}
#endif
/* Update statistics. Note byte count includes 4 byte CRC count */
stats->rx_packets++;
stats->rx_bytes += pkt_info.byte_cnt;
/*
* In case received a packet without first / last bits on OR the error
* summary bit is on, the packets needs to be dropeed.
*/
if (((pkt_info.
cmd_sts & (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC)) !=
(ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC))
|| (pkt_info.cmd_sts & ETH_ERROR_SUMMARY)) {
stats->rx_dropped++;
printf ("Received packet spread on multiple descriptors\n");
/* Is this caused by an error ? */
if (pkt_info.cmd_sts & ETH_ERROR_SUMMARY) {
stats->rx_errors++;
}
/* free these descriptors again without forwarding them to the higher layers */
pkt_info.buf_ptr &= ~0x7; /* realign buffer again */
pkt_info.byte_cnt = 0x0000; /* Reset Byte count */
if (eth_rx_return_buff
(ethernet_private, ETH_Q0, &pkt_info) != ETH_OK) {
printf ("Error while returning the RX Desc to Ring\n");
} else {
DP (printf ("RX Desc returned to Ring\n"));
}
/* /free these descriptors again */
} else {
/* !!! call higher layer processing */
#ifdef DEBUG_MV_ETH
printf ("\nNow send it to upper layer protocols (NetReceive) ...\n");
#endif
/* let the upper layer handle the packet */
NetReceive ((uchar *) pkt_info.buf_ptr,
(int) pkt_info.byte_cnt);
/* **************************************************************** */
/* free descriptor */
pkt_info.buf_ptr &= ~0x7; /* realign buffer again */
pkt_info.byte_cnt = 0x0000; /* Reset Byte count */
DP (printf ("RX: pkt_info.buf_ptr = %x\n", pkt_info.buf_ptr));
if (eth_rx_return_buff
(ethernet_private, ETH_Q0, &pkt_info) != ETH_OK) {
printf ("Error while returning the RX Desc to Ring\n");
} else {
DP (printf ("RX: Desc returned to Ring\n"));
}
/* **************************************************************** */
}
}
mv64460_eth_get_stats (dev); /* update statistics */
return 1;
}
/**********************************************************************
* mv64460_eth_get_stats
*
* Returns a pointer to the interface statistics.
*
* Input : dev - a pointer to the required interface
*
* Output : a pointer to the interface's statistics
**********************************************************************/
static struct net_device_stats *mv64460_eth_get_stats (struct eth_device *dev)
{
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
unsigned int port_num;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
port_private =
(struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
mv64460_eth_update_stat (dev);
return port_private->stats;
}
/**********************************************************************
* mv64460_eth_update_stat
*
* Update the statistics structure in the private data structure
*
* Input : pointer to ethernet interface network device structure
* Output : N/A
**********************************************************************/
static void mv64460_eth_update_stat (struct eth_device *dev)
{
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
struct net_device_stats *stats;
unsigned int port_num;
volatile unsigned int dummy;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
port_private =
(struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
stats = port_private->stats;
/* These are false updates */
stats->rx_packets += (unsigned long)
eth_read_mib_counter (ethernet_private->port_num,
ETH_MIB_GOOD_FRAMES_RECEIVED);
stats->tx_packets += (unsigned long)
eth_read_mib_counter (ethernet_private->port_num,
ETH_MIB_GOOD_FRAMES_SENT);
stats->rx_bytes += (unsigned long)
eth_read_mib_counter (ethernet_private->port_num,
ETH_MIB_GOOD_OCTETS_RECEIVED_LOW);
/*
* Ideally this should be as follows -
*
* stats->rx_bytes += stats->rx_bytes +
* ((unsigned long) ethReadMibCounter (ethernet_private->port_num ,
* ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH) << 32);
*
* But the unsigned long in PowerPC and MIPS are 32bit. So the next read
* is just a dummy read for proper work of the GigE port
*/
dummy = eth_read_mib_counter (ethernet_private->port_num,
ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH);
stats->tx_bytes += (unsigned long)
eth_read_mib_counter (ethernet_private->port_num,
ETH_MIB_GOOD_OCTETS_SENT_LOW);
dummy = eth_read_mib_counter (ethernet_private->port_num,
ETH_MIB_GOOD_OCTETS_SENT_HIGH);
stats->rx_errors += (unsigned long)
eth_read_mib_counter (ethernet_private->port_num,
ETH_MIB_MAC_RECEIVE_ERROR);
/* Rx dropped is for received packet with CRC error */
stats->rx_dropped +=
(unsigned long) eth_read_mib_counter (ethernet_private->
port_num,
ETH_MIB_BAD_CRC_EVENT);
stats->multicast += (unsigned long)
eth_read_mib_counter (ethernet_private->port_num,
ETH_MIB_MULTICAST_FRAMES_RECEIVED);
stats->collisions +=
(unsigned long) eth_read_mib_counter (ethernet_private->
port_num,
ETH_MIB_COLLISION) +
(unsigned long) eth_read_mib_counter (ethernet_private->
port_num,
ETH_MIB_LATE_COLLISION);
/* detailed rx errors */
stats->rx_length_errors +=
(unsigned long) eth_read_mib_counter (ethernet_private->
port_num,
ETH_MIB_UNDERSIZE_RECEIVED)
+
(unsigned long) eth_read_mib_counter (ethernet_private->
port_num,
ETH_MIB_OVERSIZE_RECEIVED);
/* detailed tx errors */
}
#ifndef UPDATE_STATS_BY_SOFTWARE
/**********************************************************************
* mv64460_eth_print_stat
*
* Update the statistics structure in the private data structure
*
* Input : pointer to ethernet interface network device structure
* Output : N/A
**********************************************************************/
static void mv64460_eth_print_stat (struct eth_device *dev)
{
ETH_PORT_INFO *ethernet_private;
struct mv64460_eth_priv *port_private;
struct net_device_stats *stats;
unsigned int port_num;
ethernet_private = (ETH_PORT_INFO *) dev->priv;
port_private =
(struct mv64460_eth_priv *) ethernet_private->port_private;
port_num = port_private->port_num;
stats = port_private->stats;
/* These are false updates */
printf ("\n### Network statistics: ###\n");
printf ("--------------------------\n");
printf (" Packets received: %ld\n", stats->rx_packets);
printf (" Packets send: %ld\n", stats->tx_packets);
printf (" Received bytes: %ld\n", stats->rx_bytes);
printf (" Send bytes: %ld\n", stats->tx_bytes);
if (stats->rx_errors != 0)
printf (" Rx Errors: %ld\n",
stats->rx_errors);
if (stats->rx_dropped != 0)
printf (" Rx dropped (CRC Errors): %ld\n",
stats->rx_dropped);
if (stats->multicast != 0)
printf (" Rx mulicast frames: %ld\n",
stats->multicast);
if (stats->collisions != 0)
printf (" No. of collisions: %ld\n",
stats->collisions);
if (stats->rx_length_errors != 0)
printf (" Rx length errors: %ld\n",
stats->rx_length_errors);
}
#endif
/**************************************************************************
*network_start - Network Kick Off Routine UBoot
*Inputs :
*Outputs :
**************************************************************************/
bool db64460_eth_start (struct eth_device *dev)
{
return (mv64460_eth_open (dev)); /* calls real open */
}
/*************************************************************************
**************************************************************************
**************************************************************************
* The second part is the low level driver of the gigE ethernet ports. *
**************************************************************************
**************************************************************************
*************************************************************************/
/*
* based on Linux code
* arch/ppc/galileo/EVB64460/mv64460_eth.c - Driver for MV64460X ethernet ports
* Copyright (C) 2002 rabeeh@galileo.co.il
* 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.
*
*/
/********************************************************************************
* Marvell's Gigabit Ethernet controller low level driver
*
* DESCRIPTION:
* This file introduce low level API to Marvell's Gigabit Ethernet
* controller. This Gigabit Ethernet Controller driver API controls
* 1) Operations (i.e. port init, start, reset etc').
* 2) Data flow (i.e. port send, receive etc').
* Each Gigabit Ethernet port is controlled via ETH_PORT_INFO
* struct.
* This struct includes user configuration information as well as
* driver internal data needed for its operations.
*
* Supported Features:
* - This low level driver is OS independent. Allocating memory for
* the descriptor rings and buffers are not within the scope of
* this driver.
* - The user is free from Rx/Tx queue managing.
* - This low level driver introduce functionality API that enable
* the to operate Marvell's Gigabit Ethernet Controller in a
* convenient way.
* - Simple Gigabit Ethernet port operation API.
* - Simple Gigabit Ethernet port data flow API.
* - Data flow and operation API support per queue functionality.
* - Support cached descriptors for better performance.
* - Enable access to all four DRAM banks and internal SRAM memory
* spaces.
* - PHY access and control API.
* - Port control register configuration API.
* - Full control over Unicast and Multicast MAC configurations.
*
* Operation flow:
*
* Initialization phase
* This phase complete the initialization of the ETH_PORT_INFO
* struct.
* User information regarding port configuration has to be set
* prior to calling the port initialization routine. For example,
* the user has to assign the port_phy_addr field which is board
* depended parameter.
* In this phase any port Tx/Rx activity is halted, MIB counters
* are cleared, PHY address is set according to user parameter and
* access to DRAM and internal SRAM memory spaces.
*
* Driver ring initialization
* Allocating memory for the descriptor rings and buffers is not
* within the scope of this driver. Thus, the user is required to
* allocate memory for the descriptors ring and buffers. Those
* memory parameters are used by the Rx and Tx ring initialization
* routines in order to curve the descriptor linked list in a form
* of a ring.
* Note: Pay special attention to alignment issues when using
* cached descriptors/buffers. In this phase the driver store
* information in the ETH_PORT_INFO struct regarding each queue
* ring.
*
* Driver start
* This phase prepares the Ethernet port for Rx and Tx activity.
* It uses the information stored in the ETH_PORT_INFO struct to
* initialize the various port registers.
*
* Data flow:
* All packet references to/from the driver are done using PKT_INFO
* struct.
* This struct is a unified struct used with Rx and Tx operations.
* This way the user is not required to be familiar with neither
* Tx nor Rx descriptors structures.
* The driver's descriptors rings are management by indexes.
* Those indexes controls the ring resources and used to indicate
* a SW resource error:
* 'current'
* This index points to the current available resource for use. For
* example in Rx process this index will point to the descriptor
* that will be passed to the user upon calling the receive routine.
* In Tx process, this index will point to the descriptor
* that will be assigned with the user packet info and transmitted.
* 'used'
* This index points to the descriptor that need to restore its
* resources. For example in Rx process, using the Rx buffer return
* API will attach the buffer returned in packet info to the
* descriptor pointed by 'used'. In Tx process, using the Tx
* descriptor return will merely return the user packet info with
* the command status of the transmitted buffer pointed by the
* 'used' index. Nevertheless, it is essential to use this routine
* to update the 'used' index.
* 'first'
* This index supports Tx Scatter-Gather. It points to the first
* descriptor of a packet assembled of multiple buffers. For example
* when in middle of Such packet we have a Tx resource error the
* 'curr' index get the value of 'first' to indicate that the ring
* returned to its state before trying to transmit this packet.
*
* Receive operation:
* The eth_port_receive API set the packet information struct,
* passed by the caller, with received information from the
* 'current' SDMA descriptor.
* It is the user responsibility to return this resource back
* to the Rx descriptor ring to enable the reuse of this source.
* Return Rx resource is done using the eth_rx_return_buff API.
*
* Transmit operation:
* The eth_port_send API supports Scatter-Gather which enables to
* send a packet spanned over multiple buffers. This means that
* for each packet info structure given by the user and put into
* the Tx descriptors ring, will be transmitted only if the 'LAST'
* bit will be set in the packet info command status field. This
* API also consider restriction regarding buffer alignments and
* sizes.
* The user must return a Tx resource after ensuring the buffer
* has been transmitted to enable the Tx ring indexes to update.
*
* BOARD LAYOUT
* This device is on-board. No jumper diagram is necessary.
*
* EXTERNAL INTERFACE
*
* Prior to calling the initialization routine eth_port_init() the user
* must set the following fields under ETH_PORT_INFO struct:
* port_num User Ethernet port number.
* port_phy_addr User PHY address of Ethernet port.
* port_mac_addr[6] User defined port MAC address.
* port_config User port configuration value.
* port_config_extend User port config extend value.
* port_sdma_config User port SDMA config value.
* port_serial_control User port serial control value.
* *port_virt_to_phys () User function to cast virtual addr to CPU bus addr.
* *port_private User scratch pad for user specific data structures.
*
* This driver introduce a set of default values:
* PORT_CONFIG_VALUE Default port configuration value
* PORT_CONFIG_EXTEND_VALUE Default port extend configuration value
* PORT_SDMA_CONFIG_VALUE Default sdma control value
* PORT_SERIAL_CONTROL_VALUE Default port serial control value
*
* This driver data flow is done using the PKT_INFO struct which is
* a unified struct for Rx and Tx operations:
* byte_cnt Tx/Rx descriptor buffer byte count.
* l4i_chk CPU provided TCP Checksum. For Tx operation only.
* cmd_sts Tx/Rx descriptor command status.
* buf_ptr Tx/Rx descriptor buffer pointer.
* return_info Tx/Rx user resource return information.
*
*
* EXTERNAL SUPPORT REQUIREMENTS
*
* This driver requires the following external support:
*
* D_CACHE_FLUSH_LINE (address, address offset)
*
* This macro applies assembly code to flush and invalidate cache
* line.
* address - address base.
* address offset - address offset
*
*
* CPU_PIPE_FLUSH
*
* This macro applies assembly code to flush the CPU pipeline.
*
*******************************************************************************/
/* includes */
/* defines */
/* SDMA command macros */
#define ETH_ENABLE_TX_QUEUE(tx_queue, eth_port) \
MV_REG_WRITE(MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG(eth_port), (1 << tx_queue))
#define ETH_DISABLE_TX_QUEUE(tx_queue, eth_port) \
MV_REG_WRITE(MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG(eth_port),\
(1 << (8 + tx_queue)))
#define ETH_ENABLE_RX_QUEUE(rx_queue, eth_port) \
MV_REG_WRITE(MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG(eth_port), (1 << rx_queue))
#define ETH_DISABLE_RX_QUEUE(rx_queue, eth_port) \
MV_REG_WRITE(MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG(eth_port), (1 << (8 + rx_queue)))
#define CURR_RFD_GET(p_curr_desc, queue) \
((p_curr_desc) = p_eth_port_ctrl->p_rx_curr_desc_q[queue])
#define CURR_RFD_SET(p_curr_desc, queue) \
(p_eth_port_ctrl->p_rx_curr_desc_q[queue] = (p_curr_desc))
#define USED_RFD_GET(p_used_desc, queue) \
((p_used_desc) = p_eth_port_ctrl->p_rx_used_desc_q[queue])
#define USED_RFD_SET(p_used_desc, queue)\
(p_eth_port_ctrl->p_rx_used_desc_q[queue] = (p_used_desc))
#define CURR_TFD_GET(p_curr_desc, queue) \
((p_curr_desc) = p_eth_port_ctrl->p_tx_curr_desc_q[queue])
#define CURR_TFD_SET(p_curr_desc, queue) \
(p_eth_port_ctrl->p_tx_curr_desc_q[queue] = (p_curr_desc))
#define USED_TFD_GET(p_used_desc, queue) \
((p_used_desc) = p_eth_port_ctrl->p_tx_used_desc_q[queue])
#define USED_TFD_SET(p_used_desc, queue) \
(p_eth_port_ctrl->p_tx_used_desc_q[queue] = (p_used_desc))
#define FIRST_TFD_GET(p_first_desc, queue) \
((p_first_desc) = p_eth_port_ctrl->p_tx_first_desc_q[queue])
#define FIRST_TFD_SET(p_first_desc, queue) \
(p_eth_port_ctrl->p_tx_first_desc_q[queue] = (p_first_desc))
/* Macros that save access to desc in order to find next desc pointer */
#define RX_NEXT_DESC_PTR(p_rx_desc, queue) (ETH_RX_DESC*)(((((unsigned int)p_rx_desc - (unsigned int)p_eth_port_ctrl->p_rx_desc_area_base[queue]) + RX_DESC_ALIGNED_SIZE) % p_eth_port_ctrl->rx_desc_area_size[queue]) + (unsigned int)p_eth_port_ctrl->p_rx_desc_area_base[queue])
#define TX_NEXT_DESC_PTR(p_tx_desc, queue) (ETH_TX_DESC*)(((((unsigned int)p_tx_desc - (unsigned int)p_eth_port_ctrl->p_tx_desc_area_base[queue]) + TX_DESC_ALIGNED_SIZE) % p_eth_port_ctrl->tx_desc_area_size[queue]) + (unsigned int)p_eth_port_ctrl->p_tx_desc_area_base[queue])
#define LINK_UP_TIMEOUT 100000
#define PHY_BUSY_TIMEOUT 10000000
/* locals */
/* PHY routines */
static void ethernet_phy_set (ETH_PORT eth_port_num, int phy_addr);
static int ethernet_phy_get (ETH_PORT eth_port_num);
/* Ethernet Port routines */
static void eth_set_access_control (ETH_PORT eth_port_num,
ETH_WIN_PARAM * param);
static bool eth_port_uc_addr (ETH_PORT eth_port_num, unsigned char uc_nibble,
ETH_QUEUE queue, int option);
#if 0 /* FIXME */
static bool eth_port_smc_addr (ETH_PORT eth_port_num,
unsigned char mc_byte,
ETH_QUEUE queue, int option);
static bool eth_port_omc_addr (ETH_PORT eth_port_num,
unsigned char crc8,
ETH_QUEUE queue, int option);
#endif
static void eth_b_copy (unsigned int src_addr, unsigned int dst_addr,
int byte_count);
void eth_dbg (ETH_PORT_INFO * p_eth_port_ctrl);
typedef enum _memory_bank { BANK0, BANK1, BANK2, BANK3 } MEMORY_BANK;
u32 mv_get_dram_bank_base_addr (MEMORY_BANK bank)
{
u32 result = 0;
u32 enable = MV_REG_READ (MV64460_BASE_ADDR_ENABLE);
if (enable & (1 << bank))
return 0;
if (bank == BANK0)
result = MV_REG_READ (MV64460_CS_0_BASE_ADDR);
if (bank == BANK1)
result = MV_REG_READ (MV64460_CS_1_BASE_ADDR);
if (bank == BANK2)
result = MV_REG_READ (MV64460_CS_2_BASE_ADDR);
if (bank == BANK3)
result = MV_REG_READ (MV64460_CS_3_BASE_ADDR);
result &= 0x0000ffff;
result = result << 16;
return result;
}
u32 mv_get_dram_bank_size (MEMORY_BANK bank)
{
u32 result = 0;
u32 enable = MV_REG_READ (MV64460_BASE_ADDR_ENABLE);
if (enable & (1 << bank))
return 0;
if (bank == BANK0)
result = MV_REG_READ (MV64460_CS_0_SIZE);
if (bank == BANK1)
result = MV_REG_READ (MV64460_CS_1_SIZE);
if (bank == BANK2)
result = MV_REG_READ (MV64460_CS_2_SIZE);
if (bank == BANK3)
result = MV_REG_READ (MV64460_CS_3_SIZE);
result += 1;
result &= 0x0000ffff;
result = result << 16;
return result;
}
u32 mv_get_internal_sram_base (void)
{
u32 result;
result = MV_REG_READ (MV64460_INTEGRATED_SRAM_BASE_ADDR);
result &= 0x0000ffff;
result = result << 16;
return result;
}
/*******************************************************************************
* eth_port_init - Initialize the Ethernet port driver
*
* DESCRIPTION:
* This function prepares the ethernet port to start its activity:
* 1) Completes the ethernet port driver struct initialization toward port
* start routine.
* 2) Resets the device to a quiescent state in case of warm reboot.
* 3) Enable SDMA access to all four DRAM banks as well as internal SRAM.
* 4) Clean MAC tables. The reset status of those tables is unknown.
* 5) Set PHY address.
* Note: Call this routine prior to eth_port_start routine and after setting
* user values in the user fields of Ethernet port control struct (i.e.
* port_phy_addr).
*
* INPUT:
* ETH_PORT_INFO *p_eth_port_ctrl Ethernet port control struct
*
* OUTPUT:
* See description.
*
* RETURN:
* None.
*
*******************************************************************************/
static void eth_port_init (ETH_PORT_INFO * p_eth_port_ctrl)
{
int queue;
ETH_WIN_PARAM win_param;
p_eth_port_ctrl->port_config = PORT_CONFIG_VALUE;
p_eth_port_ctrl->port_config_extend = PORT_CONFIG_EXTEND_VALUE;
p_eth_port_ctrl->port_sdma_config = PORT_SDMA_CONFIG_VALUE;
p_eth_port_ctrl->port_serial_control = PORT_SERIAL_CONTROL_VALUE;
p_eth_port_ctrl->port_rx_queue_command = 0;
p_eth_port_ctrl->port_tx_queue_command = 0;
/* Zero out SW structs */
for (queue = 0; queue < MAX_RX_QUEUE_NUM; queue++) {
CURR_RFD_SET ((ETH_RX_DESC *) 0x00000000, queue);
USED_RFD_SET ((ETH_RX_DESC *) 0x00000000, queue);
p_eth_port_ctrl->rx_resource_err[queue] = false;
}
for (queue = 0; queue < MAX_TX_QUEUE_NUM; queue++) {
CURR_TFD_SET ((ETH_TX_DESC *) 0x00000000, queue);
USED_TFD_SET ((ETH_TX_DESC *) 0x00000000, queue);
FIRST_TFD_SET ((ETH_TX_DESC *) 0x00000000, queue);
p_eth_port_ctrl->tx_resource_err[queue] = false;
}
eth_port_reset (p_eth_port_ctrl->port_num);
/* Set access parameters for DRAM bank 0 */
win_param.win = ETH_WIN0; /* Use Ethernet window 0 */
win_param.target = ETH_TARGET_DRAM; /* Window target - DDR */
win_param.attributes = EBAR_ATTR_DRAM_CS0; /* Enable DRAM bank */
#ifndef CONFIG_NOT_COHERENT_CACHE
win_param.attributes |= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
#endif
win_param.high_addr = 0;
/* Get bank base */
win_param.base_addr = mv_get_dram_bank_base_addr (BANK0);
win_param.size = mv_get_dram_bank_size (BANK0); /* Get bank size */
if (win_param.size == 0)
win_param.enable = 0;
else
win_param.enable = 1; /* Enable the access */
win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
/* Set the access control for address window (EPAPR) READ & WRITE */
eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
/* Set access parameters for DRAM bank 1 */
win_param.win = ETH_WIN1; /* Use Ethernet window 1 */
win_param.target = ETH_TARGET_DRAM; /* Window target - DDR */
win_param.attributes = EBAR_ATTR_DRAM_CS1; /* Enable DRAM bank */
#ifndef CONFIG_NOT_COHERENT_CACHE
win_param.attributes |= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
#endif
win_param.high_addr = 0;
/* Get bank base */
win_param.base_addr = mv_get_dram_bank_base_addr (BANK1);
win_param.size = mv_get_dram_bank_size (BANK1); /* Get bank size */
if (win_param.size == 0)
win_param.enable = 0;
else
win_param.enable = 1; /* Enable the access */
win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
/* Set the access control for address window (EPAPR) READ & WRITE */
eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
/* Set access parameters for DRAM bank 2 */
win_param.win = ETH_WIN2; /* Use Ethernet window 2 */
win_param.target = ETH_TARGET_DRAM; /* Window target - DDR */
win_param.attributes = EBAR_ATTR_DRAM_CS2; /* Enable DRAM bank */
#ifndef CONFIG_NOT_COHERENT_CACHE
win_param.attributes |= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
#endif
win_param.high_addr = 0;
/* Get bank base */
win_param.base_addr = mv_get_dram_bank_base_addr (BANK2);
win_param.size = mv_get_dram_bank_size (BANK2); /* Get bank size */
if (win_param.size == 0)
win_param.enable = 0;
else
win_param.enable = 1; /* Enable the access */
win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
/* Set the access control for address window (EPAPR) READ & WRITE */
eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
/* Set access parameters for DRAM bank 3 */
win_param.win = ETH_WIN3; /* Use Ethernet window 3 */
win_param.target = ETH_TARGET_DRAM; /* Window target - DDR */
win_param.attributes = EBAR_ATTR_DRAM_CS3; /* Enable DRAM bank */
#ifndef CONFIG_NOT_COHERENT_CACHE
win_param.attributes |= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
#endif
win_param.high_addr = 0;
/* Get bank base */
win_param.base_addr = mv_get_dram_bank_base_addr (BANK3);
win_param.size = mv_get_dram_bank_size (BANK3); /* Get bank size */
if (win_param.size == 0)
win_param.enable = 0;
else
win_param.enable = 1; /* Enable the access */
win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
/* Set the access control for address window (EPAPR) READ & WRITE */
eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
/* Set access parameters for Internal SRAM */
win_param.win = ETH_WIN4; /* Use Ethernet window 0 */
win_param.target = EBAR_TARGET_CBS; /* Target - Internal SRAM */
win_param.attributes = EBAR_ATTR_CBS_SRAM | EBAR_ATTR_CBS_SRAM_BLOCK0;
win_param.high_addr = 0;
win_param.base_addr = mv_get_internal_sram_base (); /* Get base addr */
win_param.size = MV64460_INTERNAL_SRAM_SIZE; /* Get bank size */
win_param.enable = 1; /* Enable the access */
win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
/* Set the access control for address window (EPAPR) READ & WRITE */
eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
eth_port_init_mac_tables (p_eth_port_ctrl->port_num);
ethernet_phy_set (p_eth_port_ctrl->port_num,
p_eth_port_ctrl->port_phy_addr);
return;
}
/*******************************************************************************
* eth_port_start - Start the Ethernet port activity.
*
* DESCRIPTION:
* This routine prepares the Ethernet port for Rx and Tx activity:
* 1. Initialize Tx and Rx Current Descriptor Pointer for each queue that
* has been initialized a descriptor's ring (using ether_init_tx_desc_ring
* for Tx and ether_init_rx_desc_ring for Rx)
* 2. Initialize and enable the Ethernet configuration port by writing to
* the port's configuration and command registers.
* 3. Initialize and enable the SDMA by writing to the SDMA's
* configuration and command registers.
* After completing these steps, the ethernet port SDMA can starts to
* perform Rx and Tx activities.
*
* Note: Each Rx and Tx queue descriptor's list must be initialized prior
* to calling this function (use ether_init_tx_desc_ring for Tx queues and
* ether_init_rx_desc_ring for Rx queues).
*
* INPUT:
* ETH_PORT_INFO *p_eth_port_ctrl Ethernet port control struct
*
* OUTPUT:
* Ethernet port is ready to receive and transmit.
*
* RETURN:
* false if the port PHY is not up.
* true otherwise.
*
*******************************************************************************/
static bool eth_port_start (ETH_PORT_INFO * p_eth_port_ctrl)
{
int queue;
volatile ETH_TX_DESC *p_tx_curr_desc;
volatile ETH_RX_DESC *p_rx_curr_desc;
unsigned int phy_reg_data;
ETH_PORT eth_port_num = p_eth_port_ctrl->port_num;
/* Assignment of Tx CTRP of given queue */
for (queue = 0; queue < MAX_TX_QUEUE_NUM; queue++) {
CURR_TFD_GET (p_tx_curr_desc, queue);
MV_REG_WRITE ((MV64460_ETH_TX_CURRENT_QUEUE_DESC_PTR_0
(eth_port_num)
+ (4 * queue)),
((unsigned int) p_tx_curr_desc));
}
/* Assignment of Rx CRDP of given queue */
for (queue = 0; queue < MAX_RX_QUEUE_NUM; queue++) {
CURR_RFD_GET (p_rx_curr_desc, queue);
MV_REG_WRITE ((MV64460_ETH_RX_CURRENT_QUEUE_DESC_PTR_0
(eth_port_num)
+ (4 * queue)),
((unsigned int) p_rx_curr_desc));
if (p_rx_curr_desc != NULL)
/* Add the assigned Ethernet address to the port's address table */
eth_port_uc_addr_set (p_eth_port_ctrl->port_num,
p_eth_port_ctrl->port_mac_addr,
queue);
}
/* Assign port configuration and command. */
MV_REG_WRITE (MV64460_ETH_PORT_CONFIG_REG (eth_port_num),
p_eth_port_ctrl->port_config);
MV_REG_WRITE (MV64460_ETH_PORT_CONFIG_EXTEND_REG (eth_port_num),
p_eth_port_ctrl->port_config_extend);
MV_REG_WRITE (MV64460_ETH_PORT_SERIAL_CONTROL_REG (eth_port_num),
p_eth_port_ctrl->port_serial_control);
MV_SET_REG_BITS (MV64460_ETH_PORT_SERIAL_CONTROL_REG (eth_port_num),
ETH_SERIAL_PORT_ENABLE);
/* Assign port SDMA configuration */
MV_REG_WRITE (MV64460_ETH_SDMA_CONFIG_REG (eth_port_num),
p_eth_port_ctrl->port_sdma_config);
MV_REG_WRITE (MV64460_ETH_TX_QUEUE_0_TOKEN_BUCKET_COUNT
(eth_port_num), 0x3fffffff);
MV_REG_WRITE (MV64460_ETH_TX_QUEUE_0_TOKEN_BUCKET_CONFIG
(eth_port_num), 0x03fffcff);
/* Turn off the port/queue bandwidth limitation */
MV_REG_WRITE (MV64460_ETH_MAXIMUM_TRANSMIT_UNIT (eth_port_num), 0x0);
/* Enable port Rx. */
MV_REG_WRITE (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG (eth_port_num),
p_eth_port_ctrl->port_rx_queue_command);
/* Check if link is up */
eth_port_read_smi_reg (eth_port_num, 1, &phy_reg_data);
if (!(phy_reg_data & 0x20))
return false;
return true;
}
/*******************************************************************************
* eth_port_uc_addr_set - This function Set the port Unicast address.
*
* DESCRIPTION:
* This function Set the port Ethernet MAC address.
*
* INPUT:
* ETH_PORT eth_port_num Port number.
* char * p_addr Address to be set
* ETH_QUEUE queue Rx queue number for this MAC address.
*
* OUTPUT:
* Set MAC address low and high registers. also calls eth_port_uc_addr()
* To set the unicast table with the proper information.
*
* RETURN:
* N/A.
*
*******************************************************************************/
static void eth_port_uc_addr_set (ETH_PORT eth_port_num,
unsigned char *p_addr, ETH_QUEUE queue)
{
unsigned int mac_h;
unsigned int mac_l;
mac_l = (p_addr[4] << 8) | (p_addr[5]);
mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) |
(p_addr[2] << 8) | (p_addr[3] << 0);
MV_REG_WRITE (MV64460_ETH_MAC_ADDR_LOW (eth_port_num), mac_l);
MV_REG_WRITE (MV64460_ETH_MAC_ADDR_HIGH (eth_port_num), mac_h);
/* Accept frames of this address */
eth_port_uc_addr (eth_port_num, p_addr[5], queue, ACCEPT_MAC_ADDR);
return;
}
/*******************************************************************************
* eth_port_uc_addr - This function Set the port unicast address table
*
* DESCRIPTION:
* This function locates the proper entry in the Unicast table for the
* specified MAC nibble and sets its properties according to function
* parameters.
*
* INPUT:
* ETH_PORT eth_port_num Port number.
* unsigned char uc_nibble Unicast MAC Address last nibble.
* ETH_QUEUE queue Rx queue number for this MAC address.
* int option 0 = Add, 1 = remove address.
*
* OUTPUT:
* This function add/removes MAC addresses from the port unicast address
* table.
*
* RETURN:
* true is output succeeded.
* false if option parameter is invalid.
*
*******************************************************************************/
static bool eth_port_uc_addr (ETH_PORT eth_port_num,
unsigned char uc_nibble,
ETH_QUEUE queue, int option)
{
unsigned int unicast_reg;
unsigned int tbl_offset;
unsigned int reg_offset;
/* Locate the Unicast table entry */
uc_nibble = (0xf & uc_nibble);
tbl_offset = (uc_nibble / 4) * 4; /* Register offset from unicast table base */
reg_offset = uc_nibble % 4; /* Entry offset within the above register */
switch (option) {
case REJECT_MAC_ADDR:
/* Clear accepts frame bit at specified unicast DA table entry */
unicast_reg =
MV_REG_READ ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
(eth_port_num)
+ tbl_offset));
unicast_reg &= (0x0E << (8 * reg_offset));
MV_REG_WRITE ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
(eth_port_num)
+ tbl_offset), unicast_reg);
break;
case ACCEPT_MAC_ADDR:
/* Set accepts frame bit at unicast DA filter table entry */
unicast_reg =
MV_REG_READ ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
(eth_port_num)
+ tbl_offset));
unicast_reg |= ((0x01 | queue) << (8 * reg_offset));
MV_REG_WRITE ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
(eth_port_num)
+ tbl_offset), unicast_reg);
break;
default:
return false;
}
return true;
}
#if 0 /* FIXME */
/*******************************************************************************
* eth_port_mc_addr - Multicast address settings.
*
* DESCRIPTION:
* This API controls the MV device MAC multicast support.
* The MV device supports multicast using two tables:
* 1) Special Multicast Table for MAC addresses of the form
* 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_fF).
* The MAC DA[7:0] bits are used as a pointer to the Special Multicast
* Table entries in the DA-Filter table.
* In this case, the function calls eth_port_smc_addr() routine to set the
* Special Multicast Table.
* 2) Other Multicast Table for multicast of another type. A CRC-8bit
* is used as an index to the Other Multicast Table entries in the
* DA-Filter table.
* In this case, the function calculates the CRC-8bit value and calls
* eth_port_omc_addr() routine to set the Other Multicast Table.
* INPUT:
* ETH_PORT eth_port_num Port number.
* unsigned char *p_addr Unicast MAC Address.
* ETH_QUEUE queue Rx queue number for this MAC address.
* int option 0 = Add, 1 = remove address.
*
* OUTPUT:
* See description.
*
* RETURN:
* true is output succeeded.
* false if add_address_table_entry( ) failed.
*
*******************************************************************************/
static void eth_port_mc_addr (ETH_PORT eth_port_num,
unsigned char *p_addr,
ETH_QUEUE queue, int option)
{
unsigned int mac_h;
unsigned int mac_l;
unsigned char crc_result = 0;
int mac_array[48];
int crc[8];
int i;
if ((p_addr[0] == 0x01) &&
(p_addr[1] == 0x00) &&
(p_addr[2] == 0x5E) && (p_addr[3] == 0x00) && (p_addr[4] == 0x00)) {
eth_port_smc_addr (eth_port_num, p_addr[5], queue, option);
} else {
/* Calculate CRC-8 out of the given address */
mac_h = (p_addr[0] << 8) | (p_addr[1]);
mac_l = (p_addr[2] << 24) | (p_addr[3] << 16) |
(p_addr[4] << 8) | (p_addr[5] << 0);
for (i = 0; i < 32; i++)
mac_array[i] = (mac_l >> i) & 0x1;
for (i = 32; i < 48; i++)
mac_array[i] = (mac_h >> (i - 32)) & 0x1;
crc[0] = mac_array[45] ^ mac_array[43] ^ mac_array[40] ^
mac_array[39] ^ mac_array[35] ^ mac_array[34] ^
mac_array[31] ^ mac_array[30] ^ mac_array[28] ^
mac_array[23] ^ mac_array[21] ^ mac_array[19] ^
mac_array[18] ^ mac_array[16] ^ mac_array[14] ^
mac_array[12] ^ mac_array[8] ^ mac_array[7] ^
mac_array[6] ^ mac_array[0];
crc[1] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^
mac_array[43] ^ mac_array[41] ^ mac_array[39] ^
mac_array[36] ^ mac_array[34] ^ mac_array[32] ^
mac_array[30] ^ mac_array[29] ^ mac_array[28] ^
mac_array[24] ^ mac_array[23] ^ mac_array[22] ^
mac_array[21] ^ mac_array[20] ^ mac_array[18] ^
mac_array[17] ^ mac_array[16] ^ mac_array[15] ^
mac_array[14] ^ mac_array[13] ^ mac_array[12] ^
mac_array[9] ^ mac_array[6] ^ mac_array[1] ^
mac_array[0];
crc[2] = mac_array[47] ^ mac_array[46] ^ mac_array[44] ^
mac_array[43] ^ mac_array[42] ^ mac_array[39] ^
mac_array[37] ^ mac_array[34] ^ mac_array[33] ^
mac_array[29] ^ mac_array[28] ^ mac_array[25] ^
mac_array[24] ^ mac_array[22] ^ mac_array[17] ^
mac_array[15] ^ mac_array[13] ^ mac_array[12] ^
mac_array[10] ^ mac_array[8] ^ mac_array[6] ^
mac_array[2] ^ mac_array[1] ^ mac_array[0];
crc[3] = mac_array[47] ^ mac_array[45] ^ mac_array[44] ^
mac_array[43] ^ mac_array[40] ^ mac_array[38] ^
mac_array[35] ^ mac_array[34] ^ mac_array[30] ^
mac_array[29] ^ mac_array[26] ^ mac_array[25] ^
mac_array[23] ^ mac_array[18] ^ mac_array[16] ^
mac_array[14] ^ mac_array[13] ^ mac_array[11] ^
mac_array[9] ^ mac_array[7] ^ mac_array[3] ^
mac_array[2] ^ mac_array[1];
crc[4] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^
mac_array[41] ^ mac_array[39] ^ mac_array[36] ^
mac_array[35] ^ mac_array[31] ^ mac_array[30] ^
mac_array[27] ^ mac_array[26] ^ mac_array[24] ^
mac_array[19] ^ mac_array[17] ^ mac_array[15] ^
mac_array[14] ^ mac_array[12] ^ mac_array[10] ^
mac_array[8] ^ mac_array[4] ^ mac_array[3] ^
mac_array[2];
crc[5] = mac_array[47] ^ mac_array[46] ^ mac_array[45] ^
mac_array[42] ^ mac_array[40] ^ mac_array[37] ^
mac_array[36] ^ mac_array[32] ^ mac_array[31] ^
mac_array[28] ^ mac_array[27] ^ mac_array[25] ^
mac_array[20] ^ mac_array[18] ^ mac_array[16] ^
mac_array[15] ^ mac_array[13] ^ mac_array[11] ^
mac_array[9] ^ mac_array[5] ^ mac_array[4] ^
mac_array[3];
crc[6] = mac_array[47] ^ mac_array[46] ^ mac_array[43] ^
mac_array[41] ^ mac_array[38] ^ mac_array[37] ^
mac_array[33] ^ mac_array[32] ^ mac_array[29] ^
mac_array[28] ^ mac_array[26] ^ mac_array[21] ^
mac_array[19] ^ mac_array[17] ^ mac_array[16] ^
mac_array[14] ^ mac_array[12] ^ mac_array[10] ^
mac_array[6] ^ mac_array[5] ^ mac_array[4];
crc[7] = mac_array[47] ^ mac_array[44] ^ mac_array[42] ^
mac_array[39] ^ mac_array[38] ^ mac_array[34] ^
mac_array[33] ^ mac_array[30] ^ mac_array[29] ^
mac_array[27] ^ mac_array[22] ^ mac_array[20] ^
mac_array[18] ^ mac_array[17] ^ mac_array[15] ^
mac_array[13] ^ mac_array[11] ^ mac_array[7] ^
mac_array[6] ^ mac_array[5];
for (i = 0; i < 8; i++)
crc_result = crc_result | (crc[i] << i);
eth_port_omc_addr (eth_port_num, crc_result, queue, option);
}
return;
}
/*******************************************************************************
* eth_port_smc_addr - Special Multicast address settings.
*
* DESCRIPTION:
* This routine controls the MV device special MAC multicast support.
* The Special Multicast Table for MAC addresses supports MAC of the form
* 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_fF).
* The MAC DA[7:0] bits are used as a pointer to the Special Multicast
* Table entries in the DA-Filter table.
* This function set the Special Multicast Table appropriate entry
* according to the argument given.
*
* INPUT:
* ETH_PORT eth_port_num Port number.
* unsigned char mc_byte Multicast addr last byte (MAC DA[7:0] bits).
* ETH_QUEUE queue Rx queue number for this MAC address.
* int option 0 = Add, 1 = remove address.
*
* OUTPUT:
* See description.
*
* RETURN:
* true is output succeeded.
* false if option parameter is invalid.
*
*******************************************************************************/
static bool eth_port_smc_addr (ETH_PORT eth_port_num,
unsigned char mc_byte,
ETH_QUEUE queue, int option)
{
unsigned int smc_table_reg;
unsigned int tbl_offset;
unsigned int reg_offset;
/* Locate the SMC table entry */
tbl_offset = (mc_byte / 4) * 4; /* Register offset from SMC table base */
reg_offset = mc_byte % 4; /* Entry offset within the above register */
queue &= 0x7;
switch (option) {
case REJECT_MAC_ADDR:
/* Clear accepts frame bit at specified Special DA table entry */
smc_table_reg =
MV_REG_READ ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
smc_table_reg &= (0x0E << (8 * reg_offset));
MV_REG_WRITE ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), smc_table_reg);
break;
case ACCEPT_MAC_ADDR:
/* Set accepts frame bit at specified Special DA table entry */
smc_table_reg =
MV_REG_READ ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
smc_table_reg |= ((0x01 | queue) << (8 * reg_offset));
MV_REG_WRITE ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), smc_table_reg);
break;
default:
return false;
}
return true;
}
/*******************************************************************************
* eth_port_omc_addr - Multicast address settings.
*
* DESCRIPTION:
* This routine controls the MV device Other MAC multicast support.
* The Other Multicast Table is used for multicast of another type.
* A CRC-8bit is used as an index to the Other Multicast Table entries
* in the DA-Filter table.
* The function gets the CRC-8bit value from the calling routine and
* set the Other Multicast Table appropriate entry according to the
* CRC-8 argument given.
*
* INPUT:
* ETH_PORT eth_port_num Port number.
* unsigned char crc8 A CRC-8bit (Polynomial: x^8+x^2+x^1+1).
* ETH_QUEUE queue Rx queue number for this MAC address.
* int option 0 = Add, 1 = remove address.
*
* OUTPUT:
* See description.
*
* RETURN:
* true is output succeeded.
* false if option parameter is invalid.
*
*******************************************************************************/
static bool eth_port_omc_addr (ETH_PORT eth_port_num,
unsigned char crc8,
ETH_QUEUE queue, int option)
{
unsigned int omc_table_reg;
unsigned int tbl_offset;
unsigned int reg_offset;
/* Locate the OMC table entry */
tbl_offset = (crc8 / 4) * 4; /* Register offset from OMC table base */
reg_offset = crc8 % 4; /* Entry offset within the above register */
queue &= 0x7;
switch (option) {
case REJECT_MAC_ADDR:
/* Clear accepts frame bit at specified Other DA table entry */
omc_table_reg =
MV_REG_READ ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
omc_table_reg &= (0x0E << (8 * reg_offset));
MV_REG_WRITE ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), omc_table_reg);
break;
case ACCEPT_MAC_ADDR:
/* Set accepts frame bit at specified Other DA table entry */
omc_table_reg =
MV_REG_READ ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
omc_table_reg |= ((0x01 | queue) << (8 * reg_offset));
MV_REG_WRITE ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), omc_table_reg);
break;
default:
return false;
}
return true;
}
#endif
/*******************************************************************************
* eth_port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables
*
* DESCRIPTION:
* Go through all the DA filter tables (Unicast, Special Multicast & Other
* Multicast) and set each entry to 0.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
*
* OUTPUT:
* Multicast and Unicast packets are rejected.
*
* RETURN:
* None.
*
*******************************************************************************/
static void eth_port_init_mac_tables (ETH_PORT eth_port_num)
{
int table_index;
/* Clear DA filter unicast table (Ex_dFUT) */
for (table_index = 0; table_index <= 0xC; table_index += 4)
MV_REG_WRITE ((MV64460_ETH_DA_FILTER_UNICAST_TABLE_BASE
(eth_port_num) + table_index), 0);
for (table_index = 0; table_index <= 0xFC; table_index += 4) {
/* Clear DA filter special multicast table (Ex_dFSMT) */
MV_REG_WRITE ((MV64460_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + table_index), 0);
/* Clear DA filter other multicast table (Ex_dFOMT) */
MV_REG_WRITE ((MV64460_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + table_index), 0);
}
}
/*******************************************************************************
* eth_clear_mib_counters - Clear all MIB counters
*
* DESCRIPTION:
* This function clears all MIB counters of a specific ethernet port.
* A read from the MIB counter will reset the counter.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
*
* OUTPUT:
* After reading all MIB counters, the counters resets.
*
* RETURN:
* MIB counter value.
*
*******************************************************************************/
static void eth_clear_mib_counters (ETH_PORT eth_port_num)
{
int i;
unsigned int dummy;
/* Perform dummy reads from MIB counters */
for (i = ETH_MIB_GOOD_OCTETS_RECEIVED_LOW; i < ETH_MIB_LATE_COLLISION;
i += 4)
dummy = MV_REG_READ ((MV64460_ETH_MIB_COUNTERS_BASE
(eth_port_num) + i));
return;
}
/*******************************************************************************
* eth_read_mib_counter - Read a MIB counter
*
* DESCRIPTION:
* This function reads a MIB counter of a specific ethernet port.
* NOTE - If read from ETH_MIB_GOOD_OCTETS_RECEIVED_LOW, then the
* following read must be from ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH
* register. The same applies for ETH_MIB_GOOD_OCTETS_SENT_LOW and
* ETH_MIB_GOOD_OCTETS_SENT_HIGH
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
* unsigned int mib_offset MIB counter offset (use ETH_MIB_... macros).
*
* OUTPUT:
* After reading the MIB counter, the counter resets.
*
* RETURN:
* MIB counter value.
*
*******************************************************************************/
unsigned int eth_read_mib_counter (ETH_PORT eth_port_num,
unsigned int mib_offset)
{
return (MV_REG_READ (MV64460_ETH_MIB_COUNTERS_BASE (eth_port_num)
+ mib_offset));
}
/*******************************************************************************
* ethernet_phy_set - Set the ethernet port PHY address.
*
* DESCRIPTION:
* This routine set the ethernet port PHY address according to given
* parameter.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
*
* OUTPUT:
* Set PHY Address Register with given PHY address parameter.
*
* RETURN:
* None.
*
*******************************************************************************/
static void ethernet_phy_set (ETH_PORT eth_port_num, int phy_addr)
{
unsigned int reg_data;
reg_data = MV_REG_READ (MV64460_ETH_PHY_ADDR_REG);
reg_data &= ~(0x1F << (5 * eth_port_num));
reg_data |= (phy_addr << (5 * eth_port_num));
MV_REG_WRITE (MV64460_ETH_PHY_ADDR_REG, reg_data);
return;
}
/*******************************************************************************
* ethernet_phy_get - Get the ethernet port PHY address.
*
* DESCRIPTION:
* This routine returns the given ethernet port PHY address.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
*
* OUTPUT:
* None.
*
* RETURN:
* PHY address.
*
*******************************************************************************/
static int ethernet_phy_get (ETH_PORT eth_port_num)
{
unsigned int reg_data;
reg_data = MV_REG_READ (MV64460_ETH_PHY_ADDR_REG);
return ((reg_data >> (5 * eth_port_num)) & 0x1f);
}
/***********************************************************/
/* (Re)start autonegotiation */
/***********************************************************/
int phy_setup_aneg (char *devname, unsigned char addr)
{
unsigned short ctl, adv;
/* Setup standard advertise */
miiphy_read (devname, addr, PHY_ANAR, &adv);
adv |= (PHY_ANLPAR_ACK | PHY_ANLPAR_RF | PHY_ANLPAR_T4 |
PHY_ANLPAR_TXFD | PHY_ANLPAR_TX | PHY_ANLPAR_10FD |
PHY_ANLPAR_10);
miiphy_write (devname, addr, PHY_ANAR, adv);
miiphy_read (devname, addr, PHY_1000BTCR, &adv);
adv |= (0x0300);
miiphy_write (devname, addr, PHY_1000BTCR, adv);
/* Start/Restart aneg */
miiphy_read (devname, addr, PHY_BMCR, &ctl);
ctl |= (PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
miiphy_write (devname, addr, PHY_BMCR, ctl);
return 0;
}
/*******************************************************************************
* ethernet_phy_reset - Reset Ethernet port PHY.
*
* DESCRIPTION:
* This routine utilize the SMI interface to reset the ethernet port PHY.
* The routine waits until the link is up again or link up is timeout.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
*
* OUTPUT:
* The ethernet port PHY renew its link.
*
* RETURN:
* None.
*
*******************************************************************************/
static bool ethernet_phy_reset (ETH_PORT eth_port_num)
{
unsigned int time_out = 50;
unsigned int phy_reg_data;
eth_port_read_smi_reg (eth_port_num, 20, &phy_reg_data);
phy_reg_data |= 0x0083; /* Set bit 7 to 1 for different RGMII timing */
eth_port_write_smi_reg (eth_port_num, 20, phy_reg_data);
/* Reset the PHY */
eth_port_read_smi_reg (eth_port_num, 0, &phy_reg_data);
phy_reg_data |= 0x8000; /* Set bit 15 to reset the PHY */
eth_port_write_smi_reg (eth_port_num, 0, phy_reg_data);
/* Poll on the PHY LINK */
do {
eth_port_read_smi_reg (eth_port_num, 1, &phy_reg_data);
if (time_out-- == 0)
return false;
}
while (!(phy_reg_data & 0x20));
return true;
}
/*******************************************************************************
* eth_port_reset - Reset Ethernet port
*
* DESCRIPTION:
* This routine resets the chip by aborting any SDMA engine activity and
* clearing the MIB counters. The Receiver and the Transmit unit are in
* idle state after this command is performed and the port is disabled.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
*
* OUTPUT:
* Channel activity is halted.
*
* RETURN:
* None.
*
*******************************************************************************/
static void eth_port_reset (ETH_PORT eth_port_num)
{
unsigned int reg_data;
/* Stop Tx port activity. Check port Tx activity. */
reg_data =
MV_REG_READ (MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG
(eth_port_num));
if (reg_data & 0xFF) {
/* Issue stop command for active channels only */
MV_REG_WRITE (MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG
(eth_port_num), (reg_data << 8));
/* Wait for all Tx activity to terminate. */
do {
/* Check port cause register that all Tx queues are stopped */
reg_data =
MV_REG_READ
(MV64460_ETH_TRANSMIT_QUEUE_COMMAND_REG
(eth_port_num));
}
while (reg_data & 0xFF);
}
/* Stop Rx port activity. Check port Rx activity. */
reg_data =
MV_REG_READ (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG
(eth_port_num));
if (reg_data & 0xFF) {
/* Issue stop command for active channels only */
MV_REG_WRITE (MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG
(eth_port_num), (reg_data << 8));
/* Wait for all Rx activity to terminate. */
do {
/* Check port cause register that all Rx queues are stopped */
reg_data =
MV_REG_READ
(MV64460_ETH_RECEIVE_QUEUE_COMMAND_REG
(eth_port_num));
}
while (reg_data & 0xFF);
}
/* Clear all MIB counters */
eth_clear_mib_counters (eth_port_num);
/* Reset the Enable bit in the Configuration Register */
reg_data =
MV_REG_READ (MV64460_ETH_PORT_SERIAL_CONTROL_REG
(eth_port_num));
reg_data &= ~ETH_SERIAL_PORT_ENABLE;
MV_REG_WRITE (MV64460_ETH_PORT_SERIAL_CONTROL_REG (eth_port_num),
reg_data);
return;
}
#if 0 /* Not needed here */
/*******************************************************************************
* ethernet_set_config_reg - Set specified bits in configuration register.
*
* DESCRIPTION:
* This function sets specified bits in the given ethernet
* configuration register.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
* unsigned int value 32 bit value.
*
* OUTPUT:
* The set bits in the value parameter are set in the configuration
* register.
*
* RETURN:
* None.
*
*******************************************************************************/
static void ethernet_set_config_reg (ETH_PORT eth_port_num,
unsigned int value)
{
unsigned int eth_config_reg;
eth_config_reg =
MV_REG_READ (MV64460_ETH_PORT_CONFIG_REG (eth_port_num));
eth_config_reg |= value;
MV_REG_WRITE (MV64460_ETH_PORT_CONFIG_REG (eth_port_num),
eth_config_reg);
return;
}
#endif
#if 0 /* FIXME */
/*******************************************************************************
* ethernet_reset_config_reg - Reset specified bits in configuration register.
*
* DESCRIPTION:
* This function resets specified bits in the given Ethernet
* configuration register.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
* unsigned int value 32 bit value.
*
* OUTPUT:
* The set bits in the value parameter are reset in the configuration
* register.
*
* RETURN:
* None.
*
*******************************************************************************/
static void ethernet_reset_config_reg (ETH_PORT eth_port_num,
unsigned int value)
{
unsigned int eth_config_reg;
eth_config_reg = MV_REG_READ (MV64460_ETH_PORT_CONFIG_EXTEND_REG
(eth_port_num));
eth_config_reg &= ~value;
MV_REG_WRITE (MV64460_ETH_PORT_CONFIG_EXTEND_REG (eth_port_num),
eth_config_reg);
return;
}
#endif
#if 0 /* Not needed here */
/*******************************************************************************
* ethernet_get_config_reg - Get the port configuration register
*
* DESCRIPTION:
* This function returns the configuration register value of the given
* ethernet port.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
*
* OUTPUT:
* None.
*
* RETURN:
* Port configuration register value.
*
*******************************************************************************/
static unsigned int ethernet_get_config_reg (ETH_PORT eth_port_num)
{
unsigned int eth_config_reg;
eth_config_reg = MV_REG_READ (MV64460_ETH_PORT_CONFIG_EXTEND_REG
(eth_port_num));
return eth_config_reg;
}
#endif
/*******************************************************************************
* eth_port_read_smi_reg - Read PHY registers
*
* DESCRIPTION:
* This routine utilize the SMI interface to interact with the PHY in
* order to perform PHY register read.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
* unsigned int phy_reg PHY register address offset.
* unsigned int *value Register value buffer.
*
* OUTPUT:
* Write the value of a specified PHY register into given buffer.
*
* RETURN:
* false if the PHY is busy or read data is not in valid state.
* true otherwise.
*
*******************************************************************************/
static bool eth_port_read_smi_reg (ETH_PORT eth_port_num,
unsigned int phy_reg, unsigned int *value)
{
unsigned int reg_value;
unsigned int time_out = PHY_BUSY_TIMEOUT;
int phy_addr;
phy_addr = ethernet_phy_get (eth_port_num);
/* first check that it is not busy */
do {
reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
if (time_out-- == 0) {
return false;
}
}
while (reg_value & ETH_SMI_BUSY);
/* not busy */
MV_REG_WRITE (MV64460_ETH_SMI_REG,
(phy_addr << 16) | (phy_reg << 21) |
ETH_SMI_OPCODE_READ);
time_out = PHY_BUSY_TIMEOUT; /* initialize the time out var again */
do {
reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
if (time_out-- == 0) {
return false;
}
}
while ((reg_value & ETH_SMI_READ_VALID) != ETH_SMI_READ_VALID); /* Bit set equ operation done */
/* Wait for the data to update in the SMI register */
#define PHY_UPDATE_TIMEOUT 10000
for (time_out = 0; time_out < PHY_UPDATE_TIMEOUT; time_out++);
reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
*value = reg_value & 0xffff;
return true;
}
int mv_miiphy_read(char *devname, unsigned char phy_addr,
unsigned char phy_reg, unsigned short *value)
{
unsigned int reg_value;
unsigned int time_out = PHY_BUSY_TIMEOUT;
/* first check that it is not busy */
do {
reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
if (time_out-- == 0) {
return false;
}
}
while (reg_value & ETH_SMI_BUSY);
/* not busy */
MV_REG_WRITE (MV64460_ETH_SMI_REG,
(phy_addr << 16) | (phy_reg << 21) |
ETH_SMI_OPCODE_READ);
time_out = PHY_BUSY_TIMEOUT; /* initialize the time out var again */
do {
reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
if (time_out-- == 0) {
return false;
}
}
while ((reg_value & ETH_SMI_READ_VALID) != ETH_SMI_READ_VALID); /* Bit set equ operation done */
/* Wait for the data to update in the SMI register */
for (time_out = 0; time_out < PHY_UPDATE_TIMEOUT; time_out++);
reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
*value = reg_value & 0xffff;
return 0;
}
/*******************************************************************************
* eth_port_write_smi_reg - Write to PHY registers
*
* DESCRIPTION:
* This routine utilize the SMI interface to interact with the PHY in
* order to perform writes to PHY registers.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
* unsigned int phy_reg PHY register address offset.
* unsigned int value Register value.
*
* OUTPUT:
* Write the given value to the specified PHY register.
*
* RETURN:
* false if the PHY is busy.
* true otherwise.
*
*******************************************************************************/
static bool eth_port_write_smi_reg (ETH_PORT eth_port_num,
unsigned int phy_reg, unsigned int value)
{
unsigned int reg_value;
unsigned int time_out = PHY_BUSY_TIMEOUT;
int phy_addr;
phy_addr = ethernet_phy_get (eth_port_num);
/* first check that it is not busy */
do {
reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
if (time_out-- == 0) {
return false;
}
}
while (reg_value & ETH_SMI_BUSY);
/* not busy */
MV_REG_WRITE (MV64460_ETH_SMI_REG,
(phy_addr << 16) | (phy_reg << 21) |
ETH_SMI_OPCODE_WRITE | (value & 0xffff));
return true;
}
int mv_miiphy_write(char *devname, unsigned char phy_addr,
unsigned char phy_reg, unsigned short value)
{
unsigned int reg_value;
unsigned int time_out = PHY_BUSY_TIMEOUT;
/* first check that it is not busy */
do {
reg_value = MV_REG_READ (MV64460_ETH_SMI_REG);
if (time_out-- == 0) {
return false;
}
}
while (reg_value & ETH_SMI_BUSY);
/* not busy */
MV_REG_WRITE (MV64460_ETH_SMI_REG,
(phy_addr << 16) | (phy_reg << 21) |
ETH_SMI_OPCODE_WRITE | (value & 0xffff));
return 0;
}
/*******************************************************************************
* eth_set_access_control - Config address decode parameters for Ethernet unit
*
* DESCRIPTION:
* This function configures the address decode parameters for the Gigabit
* Ethernet Controller according the given parameters struct.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
* ETH_WIN_PARAM *param Address decode parameter struct.
*
* OUTPUT:
* An access window is opened using the given access parameters.
*
* RETURN:
* None.
*
*******************************************************************************/
static void eth_set_access_control (ETH_PORT eth_port_num,
ETH_WIN_PARAM * param)
{
unsigned int access_prot_reg;
/* Set access control register */
access_prot_reg = MV_REG_READ (MV64460_ETH_ACCESS_PROTECTION_REG
(eth_port_num));
access_prot_reg &= (~(3 << (param->win * 2))); /* clear window permission */
access_prot_reg |= (param->access_ctrl << (param->win * 2));
MV_REG_WRITE (MV64460_ETH_ACCESS_PROTECTION_REG (eth_port_num),
access_prot_reg);
/* Set window Size reg (SR) */
MV_REG_WRITE ((MV64460_ETH_SIZE_REG_0 +
(ETH_SIZE_REG_GAP * param->win)),
(((param->size / 0x10000) - 1) << 16));
/* Set window Base address reg (BA) */
MV_REG_WRITE ((MV64460_ETH_BAR_0 + (ETH_BAR_GAP * param->win)),
(param->target | param->attributes | param->base_addr));
/* High address remap reg (HARR) */
if (param->win < 4)
MV_REG_WRITE ((MV64460_ETH_HIGH_ADDR_REMAP_REG_0 +
(ETH_HIGH_ADDR_REMAP_REG_GAP * param->win)),
param->high_addr);
/* Base address enable reg (BARER) */
if (param->enable == 1)
MV_RESET_REG_BITS (MV64460_ETH_BASE_ADDR_ENABLE_REG,
(1 << param->win));
else
MV_SET_REG_BITS (MV64460_ETH_BASE_ADDR_ENABLE_REG,
(1 << param->win));
}
/*******************************************************************************
* ether_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory.
*
* DESCRIPTION:
* This function prepares a Rx chained list of descriptors and packet
* buffers in a form of a ring. The routine must be called after port
* initialization routine and before port start routine.
* The Ethernet SDMA engine uses CPU bus addresses to access the various
* devices in the system (i.e. DRAM). This function uses the ethernet
* struct 'virtual to physical' routine (set by the user) to set the ring
* with physical addresses.
*
* INPUT:
* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
* ETH_QUEUE rx_queue Number of Rx queue.
* int rx_desc_num Number of Rx descriptors
* int rx_buff_size Size of Rx buffer
* unsigned int rx_desc_base_addr Rx descriptors memory area base addr.
* unsigned int rx_buff_base_addr Rx buffer memory area base addr.
*
* OUTPUT:
* The routine updates the Ethernet port control struct with information
* regarding the Rx descriptors and buffers.
*
* RETURN:
* false if the given descriptors memory area is not aligned according to
* Ethernet SDMA specifications.
* true otherwise.
*
*******************************************************************************/
static bool ether_init_rx_desc_ring (ETH_PORT_INFO * p_eth_port_ctrl,
ETH_QUEUE rx_queue,
int rx_desc_num,
int rx_buff_size,
unsigned int rx_desc_base_addr,
unsigned int rx_buff_base_addr)
{
ETH_RX_DESC *p_rx_desc;
ETH_RX_DESC *p_rx_prev_desc; /* pointer to link with the last descriptor */
unsigned int buffer_addr;
int ix; /* a counter */
p_rx_desc = (ETH_RX_DESC *) rx_desc_base_addr;
p_rx_prev_desc = p_rx_desc;
buffer_addr = rx_buff_base_addr;
/* Rx desc Must be 4LW aligned (i.e. Descriptor_Address[3:0]=0000). */
if (rx_buff_base_addr & 0xF)
return false;
/* Rx buffers are limited to 64K bytes and Minimum size is 8 bytes */
if ((rx_buff_size < 8) || (rx_buff_size > RX_BUFFER_MAX_SIZE))
return false;
/* Rx buffers must be 64-bit aligned. */
if ((rx_buff_base_addr + rx_buff_size) & 0x7)
return false;
/* initialize the Rx descriptors ring */
for (ix = 0; ix < rx_desc_num; ix++) {
p_rx_desc->buf_size = rx_buff_size;
p_rx_desc->byte_cnt = 0x0000;
p_rx_desc->cmd_sts =
ETH_BUFFER_OWNED_BY_DMA | ETH_RX_ENABLE_INTERRUPT;
p_rx_desc->next_desc_ptr =
((unsigned int) p_rx_desc) + RX_DESC_ALIGNED_SIZE;
p_rx_desc->buf_ptr = buffer_addr;
p_rx_desc->return_info = 0x00000000;
D_CACHE_FLUSH_LINE (p_rx_desc, 0);
buffer_addr += rx_buff_size;
p_rx_prev_desc = p_rx_desc;
p_rx_desc = (ETH_RX_DESC *)
((unsigned int) p_rx_desc + RX_DESC_ALIGNED_SIZE);
}
/* Closing Rx descriptors ring */
p_rx_prev_desc->next_desc_ptr = (rx_desc_base_addr);
D_CACHE_FLUSH_LINE (p_rx_prev_desc, 0);
/* Save Rx desc pointer to driver struct. */
CURR_RFD_SET ((ETH_RX_DESC *) rx_desc_base_addr, rx_queue);
USED_RFD_SET ((ETH_RX_DESC *) rx_desc_base_addr, rx_queue);
p_eth_port_ctrl->p_rx_desc_area_base[rx_queue] =
(ETH_RX_DESC *) rx_desc_base_addr;
p_eth_port_ctrl->rx_desc_area_size[rx_queue] =
rx_desc_num * RX_DESC_ALIGNED_SIZE;
p_eth_port_ctrl->port_rx_queue_command |= (1 << rx_queue);
return true;
}
/*******************************************************************************
* ether_init_tx_desc_ring - Curve a Tx chain desc list and buffer in memory.
*
* DESCRIPTION:
* This function prepares a Tx chained list of descriptors and packet
* buffers in a form of a ring. The routine must be called after port
* initialization routine and before port start routine.
* The Ethernet SDMA engine uses CPU bus addresses to access the various
* devices in the system (i.e. DRAM). This function uses the ethernet
* struct 'virtual to physical' routine (set by the user) to set the ring
* with physical addresses.
*
* INPUT:
* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
* ETH_QUEUE tx_queue Number of Tx queue.
* int tx_desc_num Number of Tx descriptors
* int tx_buff_size Size of Tx buffer
* unsigned int tx_desc_base_addr Tx descriptors memory area base addr.
* unsigned int tx_buff_base_addr Tx buffer memory area base addr.
*
* OUTPUT:
* The routine updates the Ethernet port control struct with information
* regarding the Tx descriptors and buffers.
*
* RETURN:
* false if the given descriptors memory area is not aligned according to
* Ethernet SDMA specifications.
* true otherwise.
*
*******************************************************************************/
static bool ether_init_tx_desc_ring (ETH_PORT_INFO * p_eth_port_ctrl,
ETH_QUEUE tx_queue,
int tx_desc_num,
int tx_buff_size,
unsigned int tx_desc_base_addr,
unsigned int tx_buff_base_addr)
{
ETH_TX_DESC *p_tx_desc;
ETH_TX_DESC *p_tx_prev_desc;
unsigned int buffer_addr;
int ix; /* a counter */
/* save the first desc pointer to link with the last descriptor */
p_tx_desc = (ETH_TX_DESC *) tx_desc_base_addr;
p_tx_prev_desc = p_tx_desc;
buffer_addr = tx_buff_base_addr;
/* Tx desc Must be 4LW aligned (i.e. Descriptor_Address[3:0]=0000). */
if (tx_buff_base_addr & 0xF)
return false;
/* Tx buffers are limited to 64K bytes and Minimum size is 8 bytes */
if ((tx_buff_size > TX_BUFFER_MAX_SIZE)
|| (tx_buff_size < TX_BUFFER_MIN_SIZE))
return false;
/* Initialize the Tx descriptors ring */
for (ix = 0; ix < tx_desc_num; ix++) {
p_tx_desc->byte_cnt = 0x0000;
p_tx_desc->l4i_chk = 0x0000;
p_tx_desc->cmd_sts = 0x00000000;
p_tx_desc->next_desc_ptr =
((unsigned int) p_tx_desc) + TX_DESC_ALIGNED_SIZE;
p_tx_desc->buf_ptr = buffer_addr;
p_tx_desc->return_info = 0x00000000;
D_CACHE_FLUSH_LINE (p_tx_desc, 0);
buffer_addr += tx_buff_size;
p_tx_prev_desc = p_tx_desc;
p_tx_desc = (ETH_TX_DESC *)
((unsigned int) p_tx_desc + TX_DESC_ALIGNED_SIZE);
}
/* Closing Tx descriptors ring */
p_tx_prev_desc->next_desc_ptr = tx_desc_base_addr;
D_CACHE_FLUSH_LINE (p_tx_prev_desc, 0);
/* Set Tx desc pointer in driver struct. */
CURR_TFD_SET ((ETH_TX_DESC *) tx_desc_base_addr, tx_queue);
USED_TFD_SET ((ETH_TX_DESC *) tx_desc_base_addr, tx_queue);
/* Init Tx ring base and size parameters */
p_eth_port_ctrl->p_tx_desc_area_base[tx_queue] =
(ETH_TX_DESC *) tx_desc_base_addr;
p_eth_port_ctrl->tx_desc_area_size[tx_queue] =
(tx_desc_num * TX_DESC_ALIGNED_SIZE);
/* Add the queue to the list of Tx queues of this port */
p_eth_port_ctrl->port_tx_queue_command |= (1 << tx_queue);
return true;
}
/*******************************************************************************
* eth_port_send - Send an Ethernet packet
*
* DESCRIPTION:
* This routine send a given packet described by p_pktinfo parameter. It
* supports transmitting of a packet spaned over multiple buffers. The
* routine updates 'curr' and 'first' indexes according to the packet
* segment passed to the routine. In case the packet segment is first,
* the 'first' index is update. In any case, the 'curr' index is updated.
* If the routine get into Tx resource error it assigns 'curr' index as
* 'first'. This way the function can abort Tx process of multiple
* descriptors per packet.
*
* INPUT:
* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
* ETH_QUEUE tx_queue Number of Tx queue.
* PKT_INFO *p_pkt_info User packet buffer.
*
* OUTPUT:
* Tx ring 'curr' and 'first' indexes are updated.
*
* RETURN:
* ETH_QUEUE_FULL in case of Tx resource error.
* ETH_ERROR in case the routine can not access Tx desc ring.
* ETH_QUEUE_LAST_RESOURCE if the routine uses the last Tx resource.
* ETH_OK otherwise.
*
*******************************************************************************/
static ETH_FUNC_RET_STATUS eth_port_send (ETH_PORT_INFO * p_eth_port_ctrl,
ETH_QUEUE tx_queue,
PKT_INFO * p_pkt_info)
{
volatile ETH_TX_DESC *p_tx_desc_first;
volatile ETH_TX_DESC *p_tx_desc_curr;
volatile ETH_TX_DESC *p_tx_next_desc_curr;
volatile ETH_TX_DESC *p_tx_desc_used;
unsigned int command_status;
/* Do not process Tx ring in case of Tx ring resource error */
if (p_eth_port_ctrl->tx_resource_err[tx_queue] == true)
return ETH_QUEUE_FULL;
/* Get the Tx Desc ring indexes */
CURR_TFD_GET (p_tx_desc_curr, tx_queue);
USED_TFD_GET (p_tx_desc_used, tx_queue);
if (p_tx_desc_curr == NULL)
return ETH_ERROR;
/* The following parameters are used to save readings from memory */
p_tx_next_desc_curr = TX_NEXT_DESC_PTR (p_tx_desc_curr, tx_queue);
command_status = p_pkt_info->cmd_sts | ETH_ZERO_PADDING | ETH_GEN_CRC;
if (command_status & (ETH_TX_FIRST_DESC)) {
/* Update first desc */
FIRST_TFD_SET (p_tx_desc_curr, tx_queue);
p_tx_desc_first = p_tx_desc_curr;
} else {
FIRST_TFD_GET (p_tx_desc_first, tx_queue);
command_status |= ETH_BUFFER_OWNED_BY_DMA;
}
/* Buffers with a payload smaller than 8 bytes must be aligned to 64-bit */
/* boundary. We use the memory allocated for Tx descriptor. This memory */
/* located in TX_BUF_OFFSET_IN_DESC offset within the Tx descriptor. */
if (p_pkt_info->byte_cnt <= 8) {
printf ("You have failed in the < 8 bytes errata - fixme\n"); /* RABEEH - TBD */
return ETH_ERROR;
p_tx_desc_curr->buf_ptr =
(unsigned int) p_tx_desc_curr + TX_BUF_OFFSET_IN_DESC;
eth_b_copy (p_pkt_info->buf_ptr, p_tx_desc_curr->buf_ptr,
p_pkt_info->byte_cnt);
} else
p_tx_desc_curr->buf_ptr = p_pkt_info->buf_ptr;
p_tx_desc_curr->byte_cnt = p_pkt_info->byte_cnt;
p_tx_desc_curr->return_info = p_pkt_info->return_info;
if (p_pkt_info->cmd_sts & (ETH_TX_LAST_DESC)) {
/* Set last desc with DMA ownership and interrupt enable. */
p_tx_desc_curr->cmd_sts = command_status |
ETH_BUFFER_OWNED_BY_DMA | ETH_TX_ENABLE_INTERRUPT;
if (p_tx_desc_curr != p_tx_desc_first)
p_tx_desc_first->cmd_sts |= ETH_BUFFER_OWNED_BY_DMA;
/* Flush CPU pipe */
D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_curr, 0);
D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_first, 0);
CPU_PIPE_FLUSH;
/* Apply send command */
ETH_ENABLE_TX_QUEUE (tx_queue, p_eth_port_ctrl->port_num);
/* Finish Tx packet. Update first desc in case of Tx resource error */
p_tx_desc_first = p_tx_next_desc_curr;
FIRST_TFD_SET (p_tx_desc_first, tx_queue);
} else {
p_tx_desc_curr->cmd_sts = command_status;
D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_curr, 0);
}
/* Check for ring index overlap in the Tx desc ring */
if (p_tx_next_desc_curr == p_tx_desc_used) {
/* Update the current descriptor */
CURR_TFD_SET (p_tx_desc_first, tx_queue);
p_eth_port_ctrl->tx_resource_err[tx_queue] = true;
return ETH_QUEUE_LAST_RESOURCE;
} else {
/* Update the current descriptor */
CURR_TFD_SET (p_tx_next_desc_curr, tx_queue);
return ETH_OK;
}
}
/*******************************************************************************
* eth_tx_return_desc - Free all used Tx descriptors
*
* DESCRIPTION:
* This routine returns the transmitted packet information to the caller.
* It uses the 'first' index to support Tx desc return in case a transmit
* of a packet spanned over multiple buffer still in process.
* In case the Tx queue was in "resource error" condition, where there are
* no available Tx resources, the function resets the resource error flag.
*
* INPUT:
* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
* ETH_QUEUE tx_queue Number of Tx queue.
* PKT_INFO *p_pkt_info User packet buffer.
*
* OUTPUT:
* Tx ring 'first' and 'used' indexes are updated.
*
* RETURN:
* ETH_ERROR in case the routine can not access Tx desc ring.
* ETH_RETRY in case there is transmission in process.
* ETH_END_OF_JOB if the routine has nothing to release.
* ETH_OK otherwise.
*
*******************************************************************************/
static ETH_FUNC_RET_STATUS eth_tx_return_desc (ETH_PORT_INFO *
p_eth_port_ctrl,
ETH_QUEUE tx_queue,
PKT_INFO * p_pkt_info)
{
volatile ETH_TX_DESC *p_tx_desc_used = NULL;
volatile ETH_TX_DESC *p_tx_desc_first = NULL;
unsigned int command_status;
/* Get the Tx Desc ring indexes */
USED_TFD_GET (p_tx_desc_used, tx_queue);
FIRST_TFD_GET (p_tx_desc_first, tx_queue);
/* Sanity check */
if (p_tx_desc_used == NULL)
return ETH_ERROR;
command_status = p_tx_desc_used->cmd_sts;
/* Still transmitting... */
if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) {
D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_used, 0);
return ETH_RETRY;
}
/* Stop release. About to overlap the current available Tx descriptor */
if ((p_tx_desc_used == p_tx_desc_first) &&
(p_eth_port_ctrl->tx_resource_err[tx_queue] == false)) {
D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_used, 0);
return ETH_END_OF_JOB;
}
/* Pass the packet information to the caller */
p_pkt_info->cmd_sts = command_status;
p_pkt_info->return_info = p_tx_desc_used->return_info;
p_tx_desc_used->return_info = 0;
/* Update the next descriptor to release. */
USED_TFD_SET (TX_NEXT_DESC_PTR (p_tx_desc_used, tx_queue), tx_queue);
/* Any Tx return cancels the Tx resource error status */
if (p_eth_port_ctrl->tx_resource_err[tx_queue] == true)
p_eth_port_ctrl->tx_resource_err[tx_queue] = false;
D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_used, 0);
return ETH_OK;
}
/*******************************************************************************
* eth_port_receive - Get received information from Rx ring.
*
* DESCRIPTION:
* This routine returns the received data to the caller. There is no
* data copying during routine operation. All information is returned
* using pointer to packet information struct passed from the caller.
* If the routine exhausts Rx ring resources then the resource error flag
* is set.
*
* INPUT:
* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
* ETH_QUEUE rx_queue Number of Rx queue.
* PKT_INFO *p_pkt_info User packet buffer.
*
* OUTPUT:
* Rx ring current and used indexes are updated.
*
* RETURN:
* ETH_ERROR in case the routine can not access Rx desc ring.
* ETH_QUEUE_FULL if Rx ring resources are exhausted.
* ETH_END_OF_JOB if there is no received data.
* ETH_OK otherwise.
*
*******************************************************************************/
static ETH_FUNC_RET_STATUS eth_port_receive (ETH_PORT_INFO * p_eth_port_ctrl,
ETH_QUEUE rx_queue,
PKT_INFO * p_pkt_info)
{
volatile ETH_RX_DESC *p_rx_curr_desc;
volatile ETH_RX_DESC *p_rx_next_curr_desc;
volatile ETH_RX_DESC *p_rx_used_desc;
unsigned int command_status;
/* Do not process Rx ring in case of Rx ring resource error */
if (p_eth_port_ctrl->rx_resource_err[rx_queue] == true) {
printf ("\nRx Queue is full ...\n");
return ETH_QUEUE_FULL;
}
/* Get the Rx Desc ring 'curr and 'used' indexes */
CURR_RFD_GET (p_rx_curr_desc, rx_queue);
USED_RFD_GET (p_rx_used_desc, rx_queue);
/* Sanity check */
if (p_rx_curr_desc == NULL)
return ETH_ERROR;
/* The following parameters are used to save readings from memory */
p_rx_next_curr_desc = RX_NEXT_DESC_PTR (p_rx_curr_desc, rx_queue);
command_status = p_rx_curr_desc->cmd_sts;
/* Nothing to receive... */
if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) {
/* DP(printf("Rx: command_status: %08x\n", command_status)); */
D_CACHE_FLUSH_LINE ((unsigned int) p_rx_curr_desc, 0);
/* DP(printf("\nETH_END_OF_JOB ...\n"));*/
return ETH_END_OF_JOB;
}
p_pkt_info->byte_cnt = (p_rx_curr_desc->byte_cnt) - RX_BUF_OFFSET;
p_pkt_info->cmd_sts = command_status;
p_pkt_info->buf_ptr = (p_rx_curr_desc->buf_ptr) + RX_BUF_OFFSET;
p_pkt_info->return_info = p_rx_curr_desc->return_info;
p_pkt_info->l4i_chk = p_rx_curr_desc->buf_size; /* IP fragment indicator */
/* Clean the return info field to indicate that the packet has been */
/* moved to the upper layers */
p_rx_curr_desc->return_info = 0;
/* Update 'curr' in data structure */
CURR_RFD_SET (p_rx_next_curr_desc, rx_queue);
/* Rx descriptors resource exhausted. Set the Rx ring resource error flag */
if (p_rx_next_curr_desc == p_rx_used_desc)
p_eth_port_ctrl->rx_resource_err[rx_queue] = true;
D_CACHE_FLUSH_LINE ((unsigned int) p_rx_curr_desc, 0);
CPU_PIPE_FLUSH;
return ETH_OK;
}
/*******************************************************************************
* eth_rx_return_buff - Returns a Rx buffer back to the Rx ring.
*
* DESCRIPTION:
* This routine returns a Rx buffer back to the Rx ring. It retrieves the
* next 'used' descriptor and attached the returned buffer to it.
* In case the Rx ring was in "resource error" condition, where there are
* no available Rx resources, the function resets the resource error flag.
*
* INPUT:
* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
* ETH_QUEUE rx_queue Number of Rx queue.
* PKT_INFO *p_pkt_info Information on the returned buffer.
*
* OUTPUT:
* New available Rx resource in Rx descriptor ring.
*
* RETURN:
* ETH_ERROR in case the routine can not access Rx desc ring.
* ETH_OK otherwise.
*
*******************************************************************************/
static ETH_FUNC_RET_STATUS eth_rx_return_buff (ETH_PORT_INFO *
p_eth_port_ctrl,
ETH_QUEUE rx_queue,
PKT_INFO * p_pkt_info)
{
volatile ETH_RX_DESC *p_used_rx_desc; /* Where to return Rx resource */
/* Get 'used' Rx descriptor */
USED_RFD_GET (p_used_rx_desc, rx_queue);
/* Sanity check */
if (p_used_rx_desc == NULL)
return ETH_ERROR;
p_used_rx_desc->buf_ptr = p_pkt_info->buf_ptr;
p_used_rx_desc->return_info = p_pkt_info->return_info;
p_used_rx_desc->byte_cnt = p_pkt_info->byte_cnt;
p_used_rx_desc->buf_size = MV64460_RX_BUFFER_SIZE; /* Reset Buffer size */
/* Flush the write pipe */
CPU_PIPE_FLUSH;
/* Return the descriptor to DMA ownership */
p_used_rx_desc->cmd_sts =
ETH_BUFFER_OWNED_BY_DMA | ETH_RX_ENABLE_INTERRUPT;
/* Flush descriptor and CPU pipe */
D_CACHE_FLUSH_LINE ((unsigned int) p_used_rx_desc, 0);
CPU_PIPE_FLUSH;
/* Move the used descriptor pointer to the next descriptor */
USED_RFD_SET (RX_NEXT_DESC_PTR (p_used_rx_desc, rx_queue), rx_queue);
/* Any Rx return cancels the Rx resource error status */
if (p_eth_port_ctrl->rx_resource_err[rx_queue] == true)
p_eth_port_ctrl->rx_resource_err[rx_queue] = false;
return ETH_OK;
}
/*******************************************************************************
* eth_port_set_rx_coal - Sets coalescing interrupt mechanism on RX path
*
* DESCRIPTION:
* This routine sets the RX coalescing interrupt mechanism parameter.
* This parameter is a timeout counter, that counts in 64 t_clk
* chunks ; that when timeout event occurs a maskable interrupt
* occurs.
* The parameter is calculated using the tClk of the MV-643xx chip
* , and the required delay of the interrupt in usec.
*
* INPUT:
* ETH_PORT eth_port_num Ethernet port number
* unsigned int t_clk t_clk of the MV-643xx chip in HZ units
* unsigned int delay Delay in usec
*
* OUTPUT:
* Interrupt coalescing mechanism value is set in MV-643xx chip.
*
* RETURN:
* The interrupt coalescing value set in the gigE port.
*
*******************************************************************************/
#if 0 /* FIXME */
static unsigned int eth_port_set_rx_coal (ETH_PORT eth_port_num,
unsigned int t_clk,
unsigned int delay)
{
unsigned int coal;
coal = ((t_clk / 1000000) * delay) / 64;
/* Set RX Coalescing mechanism */
MV_REG_WRITE (MV64460_ETH_SDMA_CONFIG_REG (eth_port_num),
((coal & 0x3fff) << 8) |
(MV_REG_READ
(MV64460_ETH_SDMA_CONFIG_REG (eth_port_num))
& 0xffc000ff));
return coal;
}
#endif
/*******************************************************************************
* eth_port_set_tx_coal - Sets coalescing interrupt mechanism on TX path
*
* DESCRIPTION:
* This routine sets the TX coalescing interrupt mechanism parameter.
* This parameter is a timeout counter, that counts in 64 t_clk
* chunks ; that when timeout event occurs a maskable interrupt
* occurs.
* The parameter is calculated using the t_cLK frequency of the
* MV-643xx chip and the required delay in the interrupt in uSec
*
* INPUT:
* ETH_PORT eth_port_num Ethernet port number
* unsigned int t_clk t_clk of the MV-643xx chip in HZ units
* unsigned int delay Delay in uSeconds
*
* OUTPUT:
* Interrupt coalescing mechanism value is set in MV-643xx chip.
*
* RETURN:
* The interrupt coalescing value set in the gigE port.
*
*******************************************************************************/
#if 0 /* FIXME */
static unsigned int eth_port_set_tx_coal (ETH_PORT eth_port_num,
unsigned int t_clk,
unsigned int delay)
{
unsigned int coal;
coal = ((t_clk / 1000000) * delay) / 64;
/* Set TX Coalescing mechanism */
MV_REG_WRITE (MV64460_ETH_TX_FIFO_URGENT_THRESHOLD_REG (eth_port_num),
coal << 4);
return coal;
}
#endif
/*******************************************************************************
* eth_b_copy - Copy bytes from source to destination
*
* DESCRIPTION:
* This function supports the eight bytes limitation on Tx buffer size.
* The routine will zero eight bytes starting from the destination address
* followed by copying bytes from the source address to the destination.
*
* INPUT:
* unsigned int src_addr 32 bit source address.
* unsigned int dst_addr 32 bit destination address.
* int byte_count Number of bytes to copy.
*
* OUTPUT:
* See description.
*
* RETURN:
* None.
*
*******************************************************************************/
static void eth_b_copy (unsigned int src_addr, unsigned int dst_addr,
int byte_count)
{
/* Zero the dst_addr area */
*(unsigned int *) dst_addr = 0x0;
while (byte_count != 0) {
*(char *) dst_addr = *(char *) src_addr;
dst_addr++;
src_addr++;
byte_count--;
}
}
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