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mv643xx_eth: add support for chips without transmit bandwidth control

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Add support for mv643xx_eth versions that have no transmit bandwidth
control registers at all, such as the ethernet block found in the
Marvell 88F6183 ARM SoC.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
This commit is contained in:
Lennert Buytenhek 2008-09-04 12:22:34 +02:00 committed by Lennert Buytenhek
parent 6b8f90c276
commit 457b1d5a4b
1 changed files with 58 additions and 31 deletions
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61
drivers/net/mv643xx_eth.c
View file

@ -271,9 +271,13 @@ struct mv643xx_eth_shared_private {
*/
unsigned int t_clk;
int extended_rx_coal_limit;
int tx_bw_control_moved;
int tx_bw_control;
};
#define TX_BW_CONTROL_ABSENT 0
#define TX_BW_CONTROL_OLD_LAYOUT 1
#define TX_BW_CONTROL_NEW_LAYOUT 2
/* per-port *****************************************************************/
struct mib_counters {
@ -938,14 +942,17 @@ static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
if (bucket_size > 65535)
bucket_size = 65535;
if (mp->shared->tx_bw_control_moved) {
wrl(mp, TX_BW_RATE_MOVED(mp->port_num), token_rate);
wrl(mp, TX_BW_MTU_MOVED(mp->port_num), mtu);
wrl(mp, TX_BW_BURST_MOVED(mp->port_num), bucket_size);
} else {
switch (mp->shared->tx_bw_control) {
case TX_BW_CONTROL_OLD_LAYOUT:
wrl(mp, TX_BW_RATE(mp->port_num), token_rate);
wrl(mp, TX_BW_MTU(mp->port_num), mtu);
wrl(mp, TX_BW_BURST(mp->port_num), bucket_size);
break;
case TX_BW_CONTROL_NEW_LAYOUT:
wrl(mp, TX_BW_RATE_MOVED(mp->port_num), token_rate);
wrl(mp, TX_BW_MTU_MOVED(mp->port_num), mtu);
wrl(mp, TX_BW_BURST_MOVED(mp->port_num), bucket_size);
break;
}
}
@ -977,14 +984,21 @@ static void txq_set_fixed_prio_mode(struct tx_queue *txq)
/*
* Turn on fixed priority mode.
*/
if (mp->shared->tx_bw_control_moved)
off = TXQ_FIX_PRIO_CONF_MOVED(mp->port_num);
else
off = 0;
switch (mp->shared->tx_bw_control) {
case TX_BW_CONTROL_OLD_LAYOUT:
off = TXQ_FIX_PRIO_CONF(mp->port_num);
break;
case TX_BW_CONTROL_NEW_LAYOUT:
off = TXQ_FIX_PRIO_CONF_MOVED(mp->port_num);
break;
}
if (off) {
val = rdl(mp, off);
val |= 1 << txq->index;
wrl(mp, off, val);
}
}
static void txq_set_wrr(struct tx_queue *txq, int weight)
@ -996,11 +1010,17 @@ static void txq_set_wrr(struct tx_queue *txq, int weight)
/*
* Turn off fixed priority mode.
*/
if (mp->shared->tx_bw_control_moved)
off = TXQ_FIX_PRIO_CONF_MOVED(mp->port_num);
else
off = 0;
switch (mp->shared->tx_bw_control) {
case TX_BW_CONTROL_OLD_LAYOUT:
off = TXQ_FIX_PRIO_CONF(mp->port_num);
break;
case TX_BW_CONTROL_NEW_LAYOUT:
off = TXQ_FIX_PRIO_CONF_MOVED(mp->port_num);
break;
}
if (off) {
val = rdl(mp, off);
val &= ~(1 << txq->index);
wrl(mp, off, val);
@ -1013,6 +1033,7 @@ static void txq_set_wrr(struct tx_queue *txq, int weight)
val = rdl(mp, off);
val = (val & ~0xff) | (weight & 0xff);
wrl(mp, off, val);
}
}
@ -2288,14 +2309,20 @@ static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
msp->extended_rx_coal_limit = 0;
/*
* Check whether the TX rate control registers are in the
* old or the new place.
* Check whether the MAC supports TX rate control, and if
* yes, whether its associated registers are in the old or
* the new place.
*/
writel(1, msp->base + TX_BW_MTU_MOVED(0));
if (readl(msp->base + TX_BW_MTU_MOVED(0)) & 1)
msp->tx_bw_control_moved = 1;
if (readl(msp->base + TX_BW_MTU_MOVED(0)) & 1) {
msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
} else {
writel(7, msp->base + TX_BW_RATE(0));
if (readl(msp->base + TX_BW_RATE(0)) & 7)
msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
else
msp->tx_bw_control_moved = 0;
msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
}
}
static int mv643xx_eth_shared_probe(struct platform_device *pdev)