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net: ethernet: ti: cpsw: add multi queue support

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The cpsw h/w supports up to 8 tx and 8 rx channels. This patch adds
multi-queue support to the driver only, shaper configuration will
be added with separate patch series. Default shaper mode, as
before, priority mode, but with corrected priority order, 0 - is
highest priority, 7 - lowest.

The poll function handles all unprocessed channels, till all of
them are free, beginning from hi priority channel.

In dual_emac mode the channels are shared between two network devices,
as it's with single-queue default mode.

The statistic for every channel can be read with:
$ ethtool -S ethX

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Khoronzhuk 2016-08-22 21:18:26 +03:00 committed by David S. Miller
parent 080d5c5ac8
commit e05107e6b7
3 changed files with 208 additions and 103 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

297
drivers/net/ethernet/ti/cpsw.c
View File

@ -124,7 +124,7 @@ do { \
#define RX_PRIORITY_MAPPING 0x76543210
#define TX_PRIORITY_MAPPING 0x33221100
#define CPDMA_TX_PRIORITY_MAP 0x76543210
#define CPDMA_TX_PRIORITY_MAP 0x01234567
#define CPSW_VLAN_AWARE BIT(1)
#define CPSW_ALE_VLAN_AWARE 1
@ -144,6 +144,7 @@ do { \
((cpsw->data.dual_emac) ? priv->emac_port : \
cpsw->data.active_slave)
#define IRQ_NUM 2
#define CPSW_MAX_QUEUES 8
static int debug_level;
module_param(debug_level, int, 0);
@ -379,13 +380,15 @@ struct cpsw_common {
int rx_packet_max;
struct cpsw_slave *slaves;
struct cpdma_ctlr *dma;
struct cpdma_chan *txch, *rxch;
struct cpdma_chan *txch[CPSW_MAX_QUEUES];
struct cpdma_chan *rxch[CPSW_MAX_QUEUES];
struct cpsw_ale *ale;
bool quirk_irq;
bool rx_irq_disabled;
bool tx_irq_disabled;
u32 irqs_table[IRQ_NUM];
struct cpts *cpts;
int rx_ch_num, tx_ch_num;
};
struct cpsw_priv {
@ -457,35 +460,26 @@ static const struct cpsw_stats cpsw_gstrings_stats[] = {
{ "Rx Start of Frame Overruns", CPSW_STAT(rxsofoverruns) },
{ "Rx Middle of Frame Overruns", CPSW_STAT(rxmofoverruns) },
{ "Rx DMA Overruns", CPSW_STAT(rxdmaoverruns) },
{ "Rx DMA chan: head_enqueue", CPDMA_RX_STAT(head_enqueue) },
{ "Rx DMA chan: tail_enqueue", CPDMA_RX_STAT(tail_enqueue) },
{ "Rx DMA chan: pad_enqueue", CPDMA_RX_STAT(pad_enqueue) },
{ "Rx DMA chan: misqueued", CPDMA_RX_STAT(misqueued) },
{ "Rx DMA chan: desc_alloc_fail", CPDMA_RX_STAT(desc_alloc_fail) },
{ "Rx DMA chan: pad_alloc_fail", CPDMA_RX_STAT(pad_alloc_fail) },
{ "Rx DMA chan: runt_receive_buf", CPDMA_RX_STAT(runt_receive_buff) },
{ "Rx DMA chan: runt_transmit_buf", CPDMA_RX_STAT(runt_transmit_buff) },
{ "Rx DMA chan: empty_dequeue", CPDMA_RX_STAT(empty_dequeue) },
{ "Rx DMA chan: busy_dequeue", CPDMA_RX_STAT(busy_dequeue) },
{ "Rx DMA chan: good_dequeue", CPDMA_RX_STAT(good_dequeue) },
{ "Rx DMA chan: requeue", CPDMA_RX_STAT(requeue) },
{ "Rx DMA chan: teardown_dequeue", CPDMA_RX_STAT(teardown_dequeue) },
{ "Tx DMA chan: head_enqueue", CPDMA_TX_STAT(head_enqueue) },
{ "Tx DMA chan: tail_enqueue", CPDMA_TX_STAT(tail_enqueue) },
{ "Tx DMA chan: pad_enqueue", CPDMA_TX_STAT(pad_enqueue) },
{ "Tx DMA chan: misqueued", CPDMA_TX_STAT(misqueued) },
{ "Tx DMA chan: desc_alloc_fail", CPDMA_TX_STAT(desc_alloc_fail) },
{ "Tx DMA chan: pad_alloc_fail", CPDMA_TX_STAT(pad_alloc_fail) },
{ "Tx DMA chan: runt_receive_buf", CPDMA_TX_STAT(runt_receive_buff) },
{ "Tx DMA chan: runt_transmit_buf", CPDMA_TX_STAT(runt_transmit_buff) },
{ "Tx DMA chan: empty_dequeue", CPDMA_TX_STAT(empty_dequeue) },
{ "Tx DMA chan: busy_dequeue", CPDMA_TX_STAT(busy_dequeue) },
{ "Tx DMA chan: good_dequeue", CPDMA_TX_STAT(good_dequeue) },
{ "Tx DMA chan: requeue", CPDMA_TX_STAT(requeue) },
{ "Tx DMA chan: teardown_dequeue", CPDMA_TX_STAT(teardown_dequeue) },
};
#define CPSW_STATS_LEN ARRAY_SIZE(cpsw_gstrings_stats)
static const struct cpsw_stats cpsw_gstrings_ch_stats[] = {
{ "head_enqueue", CPDMA_RX_STAT(head_enqueue) },
{ "tail_enqueue", CPDMA_RX_STAT(tail_enqueue) },
{ "pad_enqueue", CPDMA_RX_STAT(pad_enqueue) },
{ "misqueued", CPDMA_RX_STAT(misqueued) },
{ "desc_alloc_fail", CPDMA_RX_STAT(desc_alloc_fail) },
{ "pad_alloc_fail", CPDMA_RX_STAT(pad_alloc_fail) },
{ "runt_receive_buf", CPDMA_RX_STAT(runt_receive_buff) },
{ "runt_transmit_buf", CPDMA_RX_STAT(runt_transmit_buff) },
{ "empty_dequeue", CPDMA_RX_STAT(empty_dequeue) },
{ "busy_dequeue", CPDMA_RX_STAT(busy_dequeue) },
{ "good_dequeue", CPDMA_RX_STAT(good_dequeue) },
{ "requeue", CPDMA_RX_STAT(requeue) },
{ "teardown_dequeue", CPDMA_RX_STAT(teardown_dequeue) },
};
#define CPSW_STATS_COMMON_LEN ARRAY_SIZE(cpsw_gstrings_stats)
#define CPSW_STATS_CH_LEN ARRAY_SIZE(cpsw_gstrings_ch_stats)
#define ndev_to_cpsw(ndev) (((struct cpsw_priv *)netdev_priv(ndev))->cpsw)
#define napi_to_cpsw(napi) container_of(napi, struct cpsw_common, napi)
@ -669,6 +663,7 @@ static void cpsw_intr_disable(struct cpsw_common *cpsw)
static void cpsw_tx_handler(void *token, int len, int status)
{
struct netdev_queue *txq;
struct sk_buff *skb = token;
struct net_device *ndev = skb->dev;
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
@ -676,8 +671,10 @@ static void cpsw_tx_handler(void *token, int len, int status)
/* Check whether the queue is stopped due to stalled tx dma, if the
* queue is stopped then start the queue as we have free desc for tx
*/
if (unlikely(netif_queue_stopped(ndev)))
netif_wake_queue(ndev);
txq = netdev_get_tx_queue(ndev, skb_get_queue_mapping(skb));
if (unlikely(netif_tx_queue_stopped(txq)))
netif_tx_wake_queue(txq);
cpts_tx_timestamp(cpsw->cpts, skb);
ndev->stats.tx_packets++;
ndev->stats.tx_bytes += len;
@ -686,6 +683,7 @@ static void cpsw_tx_handler(void *token, int len, int status)
static void cpsw_rx_handler(void *token, int len, int status)
{
struct cpdma_chan *ch;
struct sk_buff *skb = token;
struct sk_buff *new_skb;
struct net_device *ndev = skb->dev;
@ -724,6 +722,7 @@ static void cpsw_rx_handler(void *token, int len, int status)
new_skb = netdev_alloc_skb_ip_align(ndev, cpsw->rx_packet_max);
if (new_skb) {
skb_copy_queue_mapping(new_skb, skb);
skb_put(skb, len);
cpts_rx_timestamp(cpsw->cpts, skb);
skb->protocol = eth_type_trans(skb, ndev);
@ -737,7 +736,8 @@ static void cpsw_rx_handler(void *token, int len, int status)
}
requeue:
ret = cpdma_chan_submit(cpsw->rxch, new_skb, new_skb->data,
ch = cpsw->rxch[skb_get_queue_mapping(new_skb)];
ret = cpdma_chan_submit(ch, new_skb, new_skb->data,
skb_tailroom(new_skb), 0);
if (WARN_ON(ret < 0))
dev_kfree_skb_any(new_skb);
@ -777,10 +777,27 @@ static irqreturn_t cpsw_rx_interrupt(int irq, void *dev_id)
static int cpsw_tx_poll(struct napi_struct *napi_tx, int budget)
{
u32 ch_map;
int num_tx, ch;
struct cpsw_common *cpsw = napi_to_cpsw(napi_tx);
int num_tx;
num_tx = cpdma_chan_process(cpsw->txch, budget);
/* process every unprocessed channel */
ch_map = cpdma_ctrl_txchs_state(cpsw->dma);
for (ch = 0, num_tx = 0; num_tx < budget; ch_map >>= 1, ch++) {
if (!ch_map) {
ch_map = cpdma_ctrl_txchs_state(cpsw->dma);
if (!ch_map)
break;
ch = 0;
}
if (!(ch_map & 0x01))
continue;
num_tx += cpdma_chan_process(cpsw->txch[ch], budget - num_tx);
}
if (num_tx < budget) {
napi_complete(napi_tx);
writel(0xff, &cpsw->wr_regs->tx_en);
@ -795,10 +812,27 @@ static int cpsw_tx_poll(struct napi_struct *napi_tx, int budget)
static int cpsw_rx_poll(struct napi_struct *napi_rx, int budget)
{
u32 ch_map;
int num_rx, ch;
struct cpsw_common *cpsw = napi_to_cpsw(napi_rx);
int num_rx;
num_rx = cpdma_chan_process(cpsw->rxch, budget);
/* process every unprocessed channel */
ch_map = cpdma_ctrl_rxchs_state(cpsw->dma);
for (ch = 0, num_rx = 0; num_rx < budget; ch_map >>= 1, ch++) {
if (!ch_map) {
ch_map = cpdma_ctrl_rxchs_state(cpsw->dma);
if (!ch_map)
break;
ch = 0;
}
if (!(ch_map & 0x01))
continue;
num_rx += cpdma_chan_process(cpsw->rxch[ch], budget - num_rx);
}
if (num_rx < budget) {
napi_complete(napi_rx);
writel(0xff, &cpsw->wr_regs->rx_en);
@ -897,10 +931,10 @@ static void cpsw_adjust_link(struct net_device *ndev)
if (link) {
netif_carrier_on(ndev);
if (netif_running(ndev))
netif_wake_queue(ndev);
netif_tx_wake_all_queues(ndev);
} else {
netif_carrier_off(ndev);
netif_stop_queue(ndev);
netif_tx_stop_all_queues(ndev);
}
}
@ -973,26 +1007,51 @@ static int cpsw_set_coalesce(struct net_device *ndev,
static int cpsw_get_sset_count(struct net_device *ndev, int sset)
{
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
switch (sset) {
case ETH_SS_STATS:
return CPSW_STATS_LEN;
return (CPSW_STATS_COMMON_LEN +
(cpsw->rx_ch_num + cpsw->tx_ch_num) *
CPSW_STATS_CH_LEN);
default:
return -EOPNOTSUPP;
}
}
static void cpsw_add_ch_strings(u8 **p, int ch_num, int rx_dir)
{
int ch_stats_len;
int line;
int i;
ch_stats_len = CPSW_STATS_CH_LEN * ch_num;
for (i = 0; i < ch_stats_len; i++) {
line = i % CPSW_STATS_CH_LEN;
snprintf(*p, ETH_GSTRING_LEN,
"%s DMA chan %d: %s", rx_dir ? "Rx" : "Tx",
i / CPSW_STATS_CH_LEN,
cpsw_gstrings_ch_stats[line].stat_string);
*p += ETH_GSTRING_LEN;
}
}
static void cpsw_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
{
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
u8 *p = data;
int i;
switch (stringset) {
case ETH_SS_STATS:
for (i = 0; i < CPSW_STATS_LEN; i++) {
for (i = 0; i < CPSW_STATS_COMMON_LEN; i++) {
memcpy(p, cpsw_gstrings_stats[i].stat_string,
ETH_GSTRING_LEN);
p += ETH_GSTRING_LEN;
}
cpsw_add_ch_strings(&p, cpsw->rx_ch_num, 1);
cpsw_add_ch_strings(&p, cpsw->tx_ch_num, 0);
break;
}
}
@ -1000,36 +1059,31 @@ static void cpsw_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
static void cpsw_get_ethtool_stats(struct net_device *ndev,
struct ethtool_stats *stats, u64 *data)
{
struct cpdma_chan_stats rx_stats;
struct cpdma_chan_stats tx_stats;
u32 val;
u8 *p;
int i;
struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
struct cpdma_chan_stats ch_stats;
int i, l, ch;
/* Collect Davinci CPDMA stats for Rx and Tx Channel */
cpdma_chan_get_stats(cpsw->rxch, &rx_stats);
cpdma_chan_get_stats(cpsw->txch, &tx_stats);
for (l = 0; l < CPSW_STATS_COMMON_LEN; l++)
data[l] = readl(cpsw->hw_stats +
cpsw_gstrings_stats[l].stat_offset);
for (i = 0; i < CPSW_STATS_LEN; i++) {
switch (cpsw_gstrings_stats[i].type) {
case CPSW_STATS:
val = readl(cpsw->hw_stats +
cpsw_gstrings_stats[i].stat_offset);
data[i] = val;
break;
for (ch = 0; ch < cpsw->rx_ch_num; ch++) {
cpdma_chan_get_stats(cpsw->rxch[ch], &ch_stats);
for (i = 0; i < CPSW_STATS_CH_LEN; i++, l++) {
p = (u8 *)&ch_stats +
cpsw_gstrings_ch_stats[i].stat_offset;
data[l] = *(u32 *)p;
}
}
case CPDMA_RX_STATS:
p = (u8 *)&rx_stats +
cpsw_gstrings_stats[i].stat_offset;
data[i] = *(u32 *)p;
break;
case CPDMA_TX_STATS:
p = (u8 *)&tx_stats +
cpsw_gstrings_stats[i].stat_offset;
data[i] = *(u32 *)p;
break;
for (ch = 0; ch < cpsw->tx_ch_num; ch++) {
cpdma_chan_get_stats(cpsw->txch[ch], &ch_stats);
for (i = 0; i < CPSW_STATS_CH_LEN; i++, l++) {
p = (u8 *)&ch_stats +
cpsw_gstrings_ch_stats[i].stat_offset;
data[l] = *(u32 *)p;
}
}
}
@ -1050,11 +1104,12 @@ static int cpsw_common_res_usage_state(struct cpsw_common *cpsw)
}
static inline int cpsw_tx_packet_submit(struct cpsw_priv *priv,
struct sk_buff *skb)
struct sk_buff *skb,
struct cpdma_chan *txch)
{
struct cpsw_common *cpsw = priv->cpsw;
return cpdma_chan_submit(cpsw->txch, skb, skb->data, skb->len,
return cpdma_chan_submit(txch, skb, skb->data, skb->len,
priv->emac_port + cpsw->data.dual_emac);
}
@ -1218,33 +1273,37 @@ static int cpsw_fill_rx_channels(struct cpsw_priv *priv)
struct cpsw_common *cpsw = priv->cpsw;
struct sk_buff *skb;
int ch_buf_num;
int i, ret;
int ch, i, ret;
ch_buf_num = cpdma_chan_get_rx_buf_num(cpsw->rxch);
for (i = 0; i < ch_buf_num; i++) {
skb = __netdev_alloc_skb_ip_align(priv->ndev,
cpsw->rx_packet_max,
GFP_KERNEL);
if (!skb) {
cpsw_err(priv, ifup, "cannot allocate skb\n");
return -ENOMEM;
for (ch = 0; ch < cpsw->rx_ch_num; ch++) {
ch_buf_num = cpdma_chan_get_rx_buf_num(cpsw->rxch[ch]);
for (i = 0; i < ch_buf_num; i++) {
skb = __netdev_alloc_skb_ip_align(priv->ndev,
cpsw->rx_packet_max,
GFP_KERNEL);
if (!skb) {
cpsw_err(priv, ifup, "cannot allocate skb\n");
return -ENOMEM;
}
skb_set_queue_mapping(skb, ch);
ret = cpdma_chan_submit(cpsw->rxch[ch], skb, skb->data,
skb_tailroom(skb), 0);
if (ret < 0) {
cpsw_err(priv, ifup,
"cannot submit skb to channel %d rx, error %d\n",
ch, ret);
kfree_skb(skb);
return ret;
}
kmemleak_not_leak(skb);
}
ret = cpdma_chan_submit(cpsw->rxch, skb, skb->data,
skb_tailroom(skb), 0);
if (ret < 0) {
cpsw_err(priv, ifup,
"cannot submit skb to rx channel, error %d\n",
ret);
kfree_skb(skb);
return ret;
}
kmemleak_not_leak(skb);
cpsw_info(priv, ifup, "ch %d rx, submitted %d descriptors\n",
ch, ch_buf_num);
}
cpsw_info(priv, ifup, "submitted %d rx descriptors\n", ch_buf_num);
return ch_buf_num;
return 0;
}
static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_common *cpsw)
@ -1280,6 +1339,19 @@ static int cpsw_ndo_open(struct net_device *ndev)
cpsw_intr_disable(cpsw);
netif_carrier_off(ndev);
/* Notify the stack of the actual queue counts. */
ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
if (ret) {
dev_err(priv->dev, "cannot set real number of tx queues\n");
goto err_cleanup;
}
ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
if (ret) {
dev_err(priv->dev, "cannot set real number of rx queues\n");
goto err_cleanup;
}
reg = cpsw->version;
dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
@ -1349,6 +1421,9 @@ static int cpsw_ndo_open(struct net_device *ndev)
if (cpsw->data.dual_emac)
cpsw->slaves[priv->emac_port].open_stat = true;
netif_tx_start_all_queues(ndev);
return 0;
err_cleanup:
@ -1365,7 +1440,7 @@ static int cpsw_ndo_stop(struct net_device *ndev)
struct cpsw_common *cpsw = priv->cpsw;
cpsw_info(priv, ifdown, "shutting down cpsw device\n");
netif_stop_queue(priv->ndev);
netif_tx_stop_all_queues(priv->ndev);
netif_carrier_off(priv->ndev);
if (cpsw_common_res_usage_state(cpsw) <= 1) {
@ -1387,8 +1462,10 @@ static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
int ret;
struct cpsw_common *cpsw = priv->cpsw;
struct netdev_queue *txq;
struct cpdma_chan *txch;
int ret, q_idx;
netif_trans_update(ndev);
@ -1404,7 +1481,12 @@ static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
skb_tx_timestamp(skb);
ret = cpsw_tx_packet_submit(priv, skb);
q_idx = skb_get_queue_mapping(skb);
if (q_idx >= cpsw->tx_ch_num)
q_idx = q_idx % cpsw->tx_ch_num;
txch = cpsw->txch[q_idx];
ret = cpsw_tx_packet_submit(priv, skb, txch);
if (unlikely(ret != 0)) {
cpsw_err(priv, tx_err, "desc submit failed\n");
goto fail;
@ -1413,13 +1495,16 @@ static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
/* If there is no more tx desc left free then we need to
* tell the kernel to stop sending us tx frames.
*/
if (unlikely(!cpdma_check_free_tx_desc(cpsw->txch)))
netif_stop_queue(ndev);
if (unlikely(!cpdma_check_free_tx_desc(txch))) {
txq = netdev_get_tx_queue(ndev, q_idx);
netif_tx_stop_queue(txq);
}
return NETDEV_TX_OK;
fail:
ndev->stats.tx_dropped++;
netif_stop_queue(ndev);
txq = netdev_get_tx_queue(ndev, skb_get_queue_mapping(skb));
netif_tx_stop_queue(txq);
return NETDEV_TX_BUSY;
}
@ -1601,12 +1686,16 @@ static void cpsw_ndo_tx_timeout(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
struct cpsw_common *cpsw = priv->cpsw;
int ch;
cpsw_err(priv, tx_err, "transmit timeout, restarting dma\n");
ndev->stats.tx_errors++;
cpsw_intr_disable(cpsw);
cpdma_chan_stop(cpsw->txch);
cpdma_chan_start(cpsw->txch);
for (ch = 0; ch < cpsw->tx_ch_num; ch++) {
cpdma_chan_stop(cpsw->txch[ch]);
cpdma_chan_start(cpsw->txch[ch]);
}
cpsw_intr_enable(cpsw);
}
@ -2178,7 +2267,7 @@ static int cpsw_probe_dual_emac(struct cpsw_priv *priv)
struct cpsw_priv *priv_sl2;
int ret = 0;
ndev = alloc_etherdev(sizeof(struct cpsw_priv));
ndev = alloc_etherdev_mq(sizeof(struct cpsw_priv), CPSW_MAX_QUEUES);
if (!ndev) {
dev_err(cpsw->dev, "cpsw: error allocating net_device\n");
return -ENOMEM;
@ -2279,7 +2368,7 @@ static int cpsw_probe(struct platform_device *pdev)
cpsw = devm_kzalloc(&pdev->dev, sizeof(struct cpsw_common), GFP_KERNEL);
cpsw->dev = &pdev->dev;
ndev = alloc_etherdev(sizeof(struct cpsw_priv));
ndev = alloc_etherdev_mq(sizeof(struct cpsw_priv), CPSW_MAX_QUEUES);
if (!ndev) {
dev_err(&pdev->dev, "error allocating net_device\n");
return -ENOMEM;
@ -2320,6 +2409,8 @@ static int cpsw_probe(struct platform_device *pdev)
goto clean_runtime_disable_ret;
}
data = &cpsw->data;
cpsw->rx_ch_num = 1;
cpsw->tx_ch_num = 1;
if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
@ -2444,12 +2535,12 @@ static int cpsw_probe(struct platform_device *pdev)
goto clean_runtime_disable_ret;
}
cpsw->txch = cpdma_chan_create(cpsw->dma, tx_chan_num(0),
cpsw_tx_handler);
cpsw->rxch = cpdma_chan_create(cpsw->dma, rx_chan_num(0),
cpsw_rx_handler);
cpsw->txch[0] = cpdma_chan_create(cpsw->dma, tx_chan_num(0),
cpsw_tx_handler);
cpsw->rxch[0] = cpdma_chan_create(cpsw->dma, rx_chan_num(0),
cpsw_rx_handler);
if (WARN_ON(!cpsw->txch || !cpsw->rxch)) {
if (WARN_ON(!cpsw->rxch[0] || !cpsw->txch[0])) {
dev_err(priv->dev, "error initializing dma channels\n");
ret = -ENOMEM;
goto clean_dma_ret;

12
drivers/net/ethernet/ti/davinci_cpdma.c
View File

@ -403,6 +403,18 @@ void cpdma_ctlr_eoi(struct cpdma_ctlr *ctlr, u32 value)
}
EXPORT_SYMBOL_GPL(cpdma_ctlr_eoi);
u32 cpdma_ctrl_rxchs_state(struct cpdma_ctlr *ctlr)
{
return dma_reg_read(ctlr, CPDMA_RXINTSTATMASKED);
}
EXPORT_SYMBOL_GPL(cpdma_ctrl_rxchs_state);
u32 cpdma_ctrl_txchs_state(struct cpdma_ctlr *ctlr)
{
return dma_reg_read(ctlr, CPDMA_TXINTSTATMASKED);
}
EXPORT_SYMBOL_GPL(cpdma_ctrl_txchs_state);
/**
* cpdma_chan_split_pool - Splits ctrl pool between all channels.
* Has to be called under ctlr lock

2
drivers/net/ethernet/ti/davinci_cpdma.h
View File

@ -94,6 +94,8 @@ int cpdma_chan_process(struct cpdma_chan *chan, int quota);
int cpdma_ctlr_int_ctrl(struct cpdma_ctlr *ctlr, bool enable);
void cpdma_ctlr_eoi(struct cpdma_ctlr *ctlr, u32 value);
int cpdma_chan_int_ctrl(struct cpdma_chan *chan, bool enable);
u32 cpdma_ctrl_rxchs_state(struct cpdma_ctlr *ctlr);
u32 cpdma_ctrl_txchs_state(struct cpdma_ctlr *ctlr);
bool cpdma_check_free_tx_desc(struct cpdma_chan *chan);
enum cpdma_control {