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nfp: add link status update

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Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com>
This commit is contained in:
Alejandro Lucero 2015-11-30 10:25:39 +00:00 committed by Thomas Monjalon
parent 92aa491b88
commit cef1f80504
1 changed files with 96 additions and 0 deletions
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96
drivers/net/nfp/nfp_net.c
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@ -74,6 +74,7 @@
static void nfp_net_close(struct rte_eth_dev *dev);
static int nfp_net_configure(struct rte_eth_dev *dev);
static int nfp_net_init(struct rte_eth_dev *eth_dev);
static int nfp_net_link_update(struct rte_eth_dev *dev, int wait_to_complete);
static int nfp_net_rx_fill_freelist(struct nfp_net_rxq *rxq);
static uint32_t nfp_net_rx_queue_count(struct rte_eth_dev *dev,
uint16_t queue_idx);
@ -226,6 +227,57 @@ ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
NFP_MEMZONE_ALIGN);
}
/*
* Atomically reads link status information from global structure rte_eth_dev.
*
* @param dev
* - Pointer to the structure rte_eth_dev to read from.
* - Pointer to the buffer to be saved with the link status.
*
* @return
* - On success, zero.
* - On failure, negative value.
*/
static inline int
nfp_net_dev_atomic_read_link_status(struct rte_eth_dev *dev,
struct rte_eth_link *link)
{
struct rte_eth_link *dst = link;
struct rte_eth_link *src = &dev->data->dev_link;
if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
*(uint64_t *)src) == 0)
return -1;
return 0;
}
/*
* Atomically writes the link status information into global
* structure rte_eth_dev.
*
* @param dev
* - Pointer to the structure rte_eth_dev to read from.
* - Pointer to the buffer to be saved with the link status.
*
* @return
* - On success, zero.
* - On failure, negative value.
*/
static inline int
nfp_net_dev_atomic_write_link_status(struct rte_eth_dev *dev,
struct rte_eth_link *link)
{
struct rte_eth_link *dst = &dev->data->dev_link;
struct rte_eth_link *src = link;
if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
*(uint64_t *)src) == 0)
return -1;
return 0;
}
static void
nfp_net_rx_queue_release_mbufs(struct nfp_net_rxq *rxq)
{
@ -682,6 +734,49 @@ nfp_net_close(struct rte_eth_dev *dev)
*/
}
/*
* return 0 means link status changed, -1 means not changed
*
* Wait to complete is needed as it can take up to 9 seconds to get the Link
* status.
*/
static int
nfp_net_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
{
struct nfp_net_hw *hw;
struct rte_eth_link link, old;
uint32_t nn_link_status;
PMD_DRV_LOG(DEBUG, "Link update\n");
hw = NFP_NET_DEV_PRIVATE_TO_HW(dev->data->dev_private);
memset(&old, 0, sizeof(old));
nfp_net_dev_atomic_read_link_status(dev, &old);
nn_link_status = nn_cfg_readl(hw, NFP_NET_CFG_STS);
memset(&link, 0, sizeof(struct rte_eth_link));
if (nn_link_status & NFP_NET_CFG_STS_LINK)
link.link_status = 1;
link.link_duplex = ETH_LINK_FULL_DUPLEX;
/* Other cards can limit the tx and rx rate per VF */
link.link_speed = ETH_LINK_SPEED_40G;
if (old.link_status != link.link_status) {
nfp_net_dev_atomic_write_link_status(dev, &link);
if (link.link_status)
PMD_DRV_LOG(INFO, "NIC Link is Up\n");
else
PMD_DRV_LOG(INFO, "NIC Link is Down\n");
return 0;
}
return -1;
}
static void
nfp_net_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
{
@ -1895,6 +1990,7 @@ static struct eth_dev_ops nfp_net_eth_dev_ops = {
.dev_start = nfp_net_start,
.dev_stop = nfp_net_stop,
.dev_close = nfp_net_close,
.link_update = nfp_net_link_update,
.stats_get = nfp_net_stats_get,
.stats_reset = nfp_net_stats_reset,
.reta_update = nfp_net_reta_update,