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As with the multiple RX queue support, allow the platform code to
specify that the hardware we are running on supports multiple TX
queues. This patch only uses the highest-numbered enabled queue
to send packets to for now, this can be extended later to enable
QoS and such.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
---
drivers/net/mv643xx_eth.c | 146 ++++++++++++++++++++++++++++++-------------
include/linux/mv643xx_eth.h | 3 +-
2 files changed, 105 insertions(+), 44 deletions(-)
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 267768c..fd9e492 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -94,16 +94,16 @@ static char mv643xx_eth_driver_version[] = "1.0";
#define INT_EXT_PHY 0x00010000
#define INT_EXT_TX_ERROR_0 0x00000100
#define INT_EXT_TX_0 0x00000001
-#define INT_EXT_TX 0x00000101
+#define INT_EXT_TX 0x0000ffff
#define INT_MASK(p) (0x0468 + ((p) << 10))
#define INT_MASK_EXT(p) (0x046c + ((p) << 10))
#define TX_FIFO_URGENT_THRESHOLD(p) (0x0474 + ((p) << 10))
#define RXQ_CURRENT_DESC_PTR(p, q) (0x060c + ((p) << 10) + ((q) << 4))
#define RXQ_COMMAND(p) (0x0680 + ((p) << 10))
-#define TXQ_CURRENT_DESC_PTR(p) (0x06c0 + ((p) << 10))
-#define TXQ_BW_TOKENS(p) (0x0700 + ((p) << 10))
-#define TXQ_BW_CONF(p) (0x0704 + ((p) << 10))
-#define TXQ_BW_WRR_CONF(p) (0x0708 + ((p) << 10))
+#define TXQ_CURRENT_DESC_PTR(p, q) (0x06c0 + ((p) << 10) + ((q) << 2))
+#define TXQ_BW_TOKENS(p, q) (0x0700 + ((p) << 10) + ((q) << 4))
+#define TXQ_BW_CONF(p, q) (0x0704 + ((p) << 10) + ((q) << 4))
+#define TXQ_BW_WRR_CONF(p, q) (0x0708 + ((p) << 10) + ((q) << 4))
#define MIB_COUNTERS(p) (0x1000 + ((p) << 7))
#define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10))
#define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10))
@@ -294,6 +294,8 @@ struct rx_queue {
};
struct tx_queue {
+ int index;
+
int tx_ring_size;
int tx_desc_count;
@@ -338,7 +340,9 @@ struct mv643xx_eth_private {
int default_tx_ring_size;
unsigned long tx_desc_sram_addr;
int tx_desc_sram_size;
- struct tx_queue txq[1];
+ u8 txq_mask;
+ int txq_primary;
+ struct tx_queue txq[8];
#ifdef MV643XX_ETH_TX_FAST_REFILL
int tx_clean_threshold;
#endif
@@ -365,7 +369,7 @@ static struct mv643xx_eth_private *rxq_to_mep(struct rx_queue *rxq)
static struct mv643xx_eth_private *txq_to_mep(struct tx_queue *txq)
{
- return container_of(txq, struct mv643xx_eth_private, txq[0]);
+ return container_of(txq, struct mv643xx_eth_private, txq[txq->index]);
}
static void rxq_enable(struct rx_queue *rxq)
@@ -387,13 +391,13 @@ static void rxq_disable(struct rx_queue *rxq)
static void txq_enable(struct tx_queue *txq)
{
struct mv643xx_eth_private *mep = txq_to_mep(txq);
- wrl(mep, TXQ_COMMAND(mep->port_num), 1);
+ wrl(mep, TXQ_COMMAND(mep->port_num), 1 << txq->index);
}
static void txq_disable(struct tx_queue *txq)
{
struct mv643xx_eth_private *mep = txq_to_mep(txq);
- u8 mask = 1;
+ u8 mask = 1 << txq->index;
wrl(mep, TXQ_COMMAND(mep->port_num), mask << 8);
while (rdl(mep, TXQ_COMMAND(mep->port_num)) & mask)
@@ -404,6 +408,12 @@ static void __txq_maybe_wake(struct tx_queue *txq)
{
struct mv643xx_eth_private *mep = txq_to_mep(txq);
+ /*
+ * netif_{stop,wake}_queue() flow control only applies to
+ * the primary queue.
+ */
+ BUG_ON(txq->index != mep->txq_primary);
+
if (txq->tx_ring_size - txq->tx_desc_count >= MAX_DESCS_PER_SKB)
netif_wake_queue(mep->dev);
}
@@ -575,8 +585,10 @@ static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
#ifdef MV643XX_ETH_TX_FAST_REFILL
if (++mep->tx_clean_threshold > 5) {
- txq_reclaim(mep->txq, 0);
mep->tx_clean_threshold = 0;
+ for (i = 0; i < 8; i++)
+ if (mep->txq_mask & (1 << i))
+ txq_reclaim(mep->txq + i, 0);
}
#endif
@@ -736,8 +748,6 @@ static int mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
struct tx_queue *txq;
unsigned long flags;
- BUG_ON(netif_queue_stopped(dev));
-
if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
stats->tx_dropped++;
dev_printk(KERN_DEBUG, &dev->dev,
@@ -748,13 +758,15 @@ static int mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
spin_lock_irqsave(&mep->lock, flags);
- txq = mep->txq;
+ txq = mep->txq + mep->txq_primary;
if (txq->tx_ring_size - txq->tx_desc_count < MAX_DESCS_PER_SKB) {
- printk(KERN_ERR "%s: transmit with queue full\n", dev->name);
- netif_stop_queue(dev);
spin_unlock_irqrestore(&mep->lock, flags);
- return NETDEV_TX_BUSY;
+ if (txq->index == mep->txq_primary && net_ratelimit())
+ dev_printk(KERN_ERR, &dev->dev,
+ "primary tx queue full?!\n");
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
}
txq_submit_skb(txq, skb);
@@ -762,8 +774,13 @@ static int mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
stats->tx_packets++;
dev->trans_start = jiffies;
- if (txq->tx_ring_size - txq->tx_desc_count < MAX_DESCS_PER_SKB)
- netif_stop_queue(dev);
+ if (txq->index == mep->txq_primary) {
+ int entries_left;
+
+ entries_left = txq->tx_ring_size - txq->tx_desc_count;
+ if (entries_left < MAX_DESCS_PER_SKB)
+ netif_stop_queue(dev);
+ }
spin_unlock_irqrestore(&mep->lock, flags);
@@ -813,8 +830,8 @@ static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
if (bucket_size > 65535)
bucket_size = 65535;
- wrl(mep, TXQ_BW_TOKENS(mep->port_num), token_rate << 14);
- wrl(mep, TXQ_BW_CONF(mep->port_num),
+ wrl(mep, TXQ_BW_TOKENS(mep->port_num, txq->index), token_rate << 14);
+ wrl(mep, TXQ_BW_CONF(mep->port_num, txq->index),
(bucket_size << 10) | token_rate);
}
@@ -830,7 +847,7 @@ static void txq_set_fixed_prio_mode(struct tx_queue *txq)
off = TXQ_FIX_PRIO_CONF(mep->port_num);
val = rdl(mep, off);
- val |= 1;
+ val |= 1 << txq->index;
wrl(mep, off, val);
}
@@ -846,13 +863,13 @@ static void txq_set_wrr(struct tx_queue *txq, int weight)
off = TXQ_FIX_PRIO_CONF(mep->port_num);
val = rdl(mep, off);
- val &= ~1;
+ val &= ~(1 << txq->index);
wrl(mep, off, val);
/*
* Configure WRR weight for this queue.
*/
- off = TXQ_BW_WRR_CONF(mep->port_num);
+ off = TXQ_BW_WRR_CONF(mep->port_num, txq->index);
val = rdl(mep, off);
val = (val & ~0xff) | (weight & 0xff);
@@ -1396,13 +1413,15 @@ static void rxq_deinit(struct rx_queue *rxq)
kfree(rxq->rx_skb);
}
-static int txq_init(struct mv643xx_eth_private *mep)
+static int txq_init(struct mv643xx_eth_private *mep, int index)
{
- struct tx_queue *txq = mep->txq;
+ struct tx_queue *txq = mep->txq + index;
struct tx_desc *tx_desc;
int size;
int i;
+ txq->index = index;
+
txq->tx_ring_size = mep->default_tx_ring_size;
txq->tx_desc_count = 0;
@@ -1411,7 +1430,7 @@ static int txq_init(struct mv643xx_eth_private *mep)
size = txq->tx_ring_size * sizeof(struct tx_desc);
- if (size <= mep->tx_desc_sram_size) {
+ if (index == mep->txq_primary && size <= mep->tx_desc_sram_size) {
txq->tx_desc_area = ioremap(mep->tx_desc_sram_addr,
mep->tx_desc_sram_size);
txq->tx_desc_dma = mep->tx_desc_sram_addr;
@@ -1448,7 +1467,7 @@ static int txq_init(struct mv643xx_eth_private *mep)
out_free:
- if (size <= mep->tx_desc_sram_size)
+ if (index == mep->txq_primary && size <= mep->tx_desc_sram_size)
iounmap(txq->tx_desc_area);
else
dma_free_coherent(NULL, size,
@@ -1520,7 +1539,8 @@ static void txq_deinit(struct tx_queue *txq)
BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
- if (txq->tx_desc_area_size <= mep->tx_desc_sram_size)
+ if (txq->index == mep->txq_primary &&
+ txq->tx_desc_area_size <= mep->tx_desc_sram_size)
iounmap(txq->tx_desc_area);
else
dma_free_coherent(NULL, txq->tx_desc_area_size,
@@ -1559,12 +1579,20 @@ static void update_pscr(struct mv643xx_eth_private *mep, int speed, int duplex)
if ((pscr_o & SERIAL_PORT_ENABLE) == 0)
wrl(mep, PORT_SERIAL_CONTROL(mep->port_num), pscr_n);
else {
- txq_disable(mep->txq);
+ int i;
+
+ for (i = 0; i < 8; i++)
+ if (mep->txq_mask & (1 << i))
+ txq_disable(mep->txq + i);
+
pscr_o &= ~SERIAL_PORT_ENABLE;
wrl(mep, PORT_SERIAL_CONTROL(mep->port_num), pscr_o);
wrl(mep, PORT_SERIAL_CONTROL(mep->port_num), pscr_n);
wrl(mep, PORT_SERIAL_CONTROL(mep->port_num), pscr_n);
- txq_enable(mep->txq);
+
+ for (i = 0; i < 8; i++)
+ if (mep->txq_mask & (1 << i))
+ txq_enable(mep->txq + i);
}
}
}
@@ -1590,13 +1618,17 @@ static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
if (int_cause_ext & (INT_EXT_PHY | INT_EXT_LINK)) {
if (mii_link_ok(&mep->mii)) {
struct ethtool_cmd cmd;
+ int i;
mii_ethtool_gset(&mep->mii, &cmd);
update_pscr(mep, cmd.speed, cmd.duplex);
- txq_enable(mep->txq);
+ for (i = 0; i < 8; i++)
+ if (mep->txq_mask & (1 << i))
+ txq_enable(mep->txq + i);
+
if (!netif_carrier_ok(dev)) {
netif_carrier_on(dev);
- __txq_maybe_wake(mep->txq);
+ __txq_maybe_wake(mep->txq + mep->txq_primary);
}
} else if (netif_carrier_ok(dev)) {
netif_stop_queue(dev);
@@ -1624,9 +1656,17 @@ static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
}
#endif
+ /*
+ * TxBuffer or TxError set for any of the 8 queues?
+ */
if (int_cause_ext & INT_EXT_TX) {
- txq_reclaim(mep->txq, 0);
- __txq_maybe_wake(mep->txq);
+ int i;
+
+ for (i = 0; i < 8; i++)
+ if (mep->txq_mask & (1 << i))
+ txq_reclaim(mep->txq + i, 0);
+
+ __txq_maybe_wake(mep->txq + mep->txq_primary);
}
return IRQ_HANDLED;
@@ -1677,11 +1717,14 @@ static void port_start(struct mv643xx_eth_private *mep)
* Configure TX path and queues.
*/
tx_set_rate(mep, 1000000000, 16777216);
- for (i = 0; i < 1; i++) {
- struct tx_queue *txq = mep->txq;
- int off = TXQ_CURRENT_DESC_PTR(mep->port_num);
+ for (i = 0; i < 8; i++) {
+ struct tx_queue *txq = mep->txq + i;
+ int off = TXQ_CURRENT_DESC_PTR(mep->port_num, i);
u32 addr;
+ if ((mep->txq_mask & (1 << i)) == 0)
+ continue;
+
addr = (u32)txq->tx_desc_dma;
addr += txq->tx_curr_desc * sizeof(struct tx_desc);
wrl(mep, off, addr);
@@ -1782,9 +1825,18 @@ static int mv643xx_eth_open(struct net_device *dev)
rxq_refill(mep->rxq + i);
}
- err = txq_init(mep);
- if (err)
- goto out_free;
+ for (i = 0; i < 8; i++) {
+ if ((mep->txq_mask & (1 << i)) == 0)
+ continue;
+
+ err = txq_init(mep, i);
+ if (err) {
+ while (--i >= 0)
+ if (mep->txq_mask & (1 << i))
+ txq_deinit(mep->txq + i);
+ goto out_free;
+ }
+ }
#ifdef MV643XX_ETH_NAPI
napi_enable(&mep->napi);
@@ -1821,8 +1873,9 @@ static void port_reset(struct mv643xx_eth_private *mep)
for (i = 0; i < 8; i++) {
if (mep->rxq_mask & (1 << i))
rxq_disable(mep->rxq + i);
+ if (mep->txq_mask & (1 << i))
+ txq_disable(mep->txq + i);
}
- txq_disable(mep->txq);
while (!(rdl(mep, PORT_STATUS(mep->port_num)) & TX_FIFO_EMPTY))
udelay(10);
@@ -1856,8 +1909,9 @@ static int mv643xx_eth_stop(struct net_device *dev)
for (i = 0; i < 8; i++) {
if (mep->rxq_mask & (1 << i))
rxq_deinit(mep->rxq + i);
+ if (mep->txq_mask & (1 << i))
+ txq_deinit(mep->txq + i);
}
- txq_deinit(mep->txq);
return 0;
}
@@ -1909,7 +1963,7 @@ static void tx_timeout_task(struct work_struct *ugly)
port_reset(mep);
port_start(mep);
- __txq_maybe_wake(mep->txq);
+ __txq_maybe_wake(mep->txq + mep->txq_primary);
}
}
@@ -2120,6 +2174,12 @@ static void set_params(struct mv643xx_eth_private *mep,
mep->default_tx_ring_size = pd->tx_queue_size;
mep->tx_desc_sram_addr = pd->tx_sram_addr;
mep->tx_desc_sram_size = pd->tx_sram_size;
+
+ if (pd->tx_queue_mask)
+ mep->txq_mask = pd->tx_queue_mask;
+ else
+ mep->txq_mask = 0x01;
+ mep->txq_primary = fls(mep->txq_mask) - 1;
}
static int phy_detect(struct mv643xx_eth_private *mep)
diff --git a/include/linux/mv643xx_eth.h b/include/linux/mv643xx_eth.h
index 1afd7ba..1207857 100644
--- a/include/linux/mv643xx_eth.h
+++ b/include/linux/mv643xx_eth.h
@@ -49,9 +49,10 @@ struct mv643xx_eth_platform_data {
int duplex;
/*
- * Which RX queues to use.
+ * Which RX/TX queues to use.
*/
int rx_queue_mask;
+ int tx_queue_mask;
/*
* Override default RX/TX queue sizes if nonzero.
--
1.5.3.4
--
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