d/numam-dpdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
a6d83b6a92
numam-dpdk/drivers/net/mlx5/mlx5_ethdev.c
Nélio Laranjeiro a6d83b6a92 net/mlx5: standardize on negative errno values 
Set rte_errno systematically as well.

Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
2018-03-30 14:08:44 +02:00

1243 lines
32 KiB
C
Raw Blame History

/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2015 6WIND S.A.
* Copyright 2015 Mellanox.
*/
#define _GNU_SOURCE
#include <stddef.h>
#include <assert.h>
#include <inttypes.h>
#include <unistd.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <dirent.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/utsname.h>
#include <netinet/in.h>
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include <linux/version.h>
#include <fcntl.h>
#include <stdalign.h>
#include <sys/un.h>
#include <rte_atomic.h>
#include <rte_ethdev_driver.h>
#include <rte_bus_pci.h>
#include <rte_mbuf.h>
#include <rte_common.h>
#include <rte_interrupts.h>
#include <rte_alarm.h>
#include <rte_malloc.h>
#include "mlx5.h"
#include "mlx5_glue.h"
#include "mlx5_rxtx.h"
#include "mlx5_utils.h"
/* Add defines in case the running kernel is not the same as user headers. */
#ifndef ETHTOOL_GLINKSETTINGS
struct ethtool_link_settings {
uint32_t cmd;
uint32_t speed;
uint8_t duplex;
uint8_t port;
uint8_t phy_address;
uint8_t autoneg;
uint8_t mdio_support;
uint8_t eth_to_mdix;
uint8_t eth_tp_mdix_ctrl;
int8_t link_mode_masks_nwords;
uint32_t reserved[8];
uint32_t link_mode_masks[];
};
#define ETHTOOL_GLINKSETTINGS 0x0000004c
#define ETHTOOL_LINK_MODE_1000baseT_Full_BIT 5
#define ETHTOOL_LINK_MODE_Autoneg_BIT 6
#define ETHTOOL_LINK_MODE_1000baseKX_Full_BIT 17
#define ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT 18
#define ETHTOOL_LINK_MODE_10000baseKR_Full_BIT 19
#define ETHTOOL_LINK_MODE_10000baseR_FEC_BIT 20
#define ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT 21
#define ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT 22
#define ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT 23
#define ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT 24
#define ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT 25
#define ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT 26
#define ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT 27
#define ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT 28
#define ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT 29
#define ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT 30
#endif
#ifndef HAVE_ETHTOOL_LINK_MODE_25G
#define ETHTOOL_LINK_MODE_25000baseCR_Full_BIT 31
#define ETHTOOL_LINK_MODE_25000baseKR_Full_BIT 32
#define ETHTOOL_LINK_MODE_25000baseSR_Full_BIT 33
#endif
#ifndef HAVE_ETHTOOL_LINK_MODE_50G
#define ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT 34
#define ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT 35
#endif
#ifndef HAVE_ETHTOOL_LINK_MODE_100G
#define ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT 36
#define ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT 37
#define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38
#define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39
#endif
/**
* Get interface name from private structure.
*
* @param[in] dev
* Pointer to Ethernet device.
* @param[out] ifname
* Interface name output buffer.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[IF_NAMESIZE])
{
struct priv *priv = dev->data->dev_private;
DIR *dir;
struct dirent *dent;
unsigned int dev_type = 0;
unsigned int dev_port_prev = ~0u;
char match[IF_NAMESIZE] = "";
{
MKSTR(path, "%s/device/net", priv->ibdev_path);
dir = opendir(path);
if (dir == NULL) {
rte_errno = errno;
return -rte_errno;
}
}
while ((dent = readdir(dir)) != NULL) {
char *name = dent->d_name;
FILE *file;
unsigned int dev_port;
int r;
if ((name[0] == '.') &&
((name[1] == '\0') ||
((name[1] == '.') && (name[2] == '\0'))))
continue;
MKSTR(path, "%s/device/net/%s/%s",
priv->ibdev_path, name,
(dev_type ? "dev_id" : "dev_port"));
file = fopen(path, "rb");
if (file == NULL) {
if (errno != ENOENT)
continue;
/*
* Switch to dev_id when dev_port does not exist as
* is the case with Linux kernel versions < 3.15.
*/
try_dev_id:
match[0] = '\0';
if (dev_type)
break;
dev_type = 1;
dev_port_prev = ~0u;
rewinddir(dir);
continue;
}
r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
fclose(file);
if (r != 1)
continue;
/*
* Switch to dev_id when dev_port returns the same value for
* all ports. May happen when using a MOFED release older than
* 3.0 with a Linux kernel >= 3.15.
*/
if (dev_port == dev_port_prev)
goto try_dev_id;
dev_port_prev = dev_port;
if (dev_port == (priv->port - 1u))
snprintf(match, sizeof(match), "%s", name);
}
closedir(dir);
if (match[0] == '\0') {
rte_errno = ENOENT;
return -rte_errno;
}
strncpy(*ifname, match, sizeof(*ifname));
return 0;
}
/**
* Perform ifreq ioctl() on associated Ethernet device.
*
* @param[in] dev
* Pointer to Ethernet device.
* @param req
* Request number to pass to ioctl().
* @param[out] ifr
* Interface request structure output buffer.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_ifreq(const struct rte_eth_dev *dev, int req, struct ifreq *ifr)
{
int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
int ret = 0;
if (sock == -1) {
rte_errno = errno;
return -rte_errno;
}
ret = mlx5_get_ifname(dev, &ifr->ifr_name);
if (ret)
goto error;
ret = ioctl(sock, req, ifr);
if (ret == -1) {
rte_errno = errno;
goto error;
}
close(sock);
return 0;
error:
close(sock);
return -rte_errno;
}
/**
* Get device MTU.
*
* @param dev
* Pointer to Ethernet device.
* @param[out] mtu
* MTU value output buffer.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
{
struct ifreq request;
int ret = mlx5_ifreq(dev, SIOCGIFMTU, &request);
if (ret)
return ret;
*mtu = request.ifr_mtu;
return 0;
}
/**
* Set device MTU.
*
* @param dev
* Pointer to Ethernet device.
* @param mtu
* MTU value to set.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
static int
mlx5_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
{
struct ifreq request = { .ifr_mtu = mtu, };
return mlx5_ifreq(dev, SIOCSIFMTU, &request);
}
/**
* Set device flags.
*
* @param dev
* Pointer to Ethernet device.
* @param keep
* Bitmask for flags that must remain untouched.
* @param flags
* Bitmask for flags to modify.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_set_flags(struct rte_eth_dev *dev, unsigned int keep, unsigned int flags)
{
struct ifreq request;
int ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &request);
if (ret)
return ret;
request.ifr_flags &= keep;
request.ifr_flags |= flags & ~keep;
return mlx5_ifreq(dev, SIOCSIFFLAGS, &request);
}
/**
* DPDK callback for Ethernet device configuration.
*
* @param dev
* Pointer to Ethernet device structure.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_dev_configure(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
unsigned int rxqs_n = dev->data->nb_rx_queues;
unsigned int txqs_n = dev->data->nb_tx_queues;
unsigned int i;
unsigned int j;
unsigned int reta_idx_n;
const uint8_t use_app_rss_key =
!!dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
uint64_t supp_tx_offloads = mlx5_get_tx_port_offloads(dev);
uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
uint64_t supp_rx_offloads =
(mlx5_get_rx_port_offloads() |
mlx5_get_rx_queue_offloads(dev));
uint64_t rx_offloads = dev->data->dev_conf.rxmode.offloads;
int ret = 0;
if ((tx_offloads & supp_tx_offloads) != tx_offloads) {
ERROR("Some Tx offloads are not supported "
"requested 0x%" PRIx64 " supported 0x%" PRIx64,
tx_offloads, supp_tx_offloads);
rte_errno = ENOTSUP;
return -rte_errno;
}
if ((rx_offloads & supp_rx_offloads) != rx_offloads) {
ERROR("Some Rx offloads are not supported "
"requested 0x%" PRIx64 " supported 0x%" PRIx64,
rx_offloads, supp_rx_offloads);
rte_errno = ENOTSUP;
return -rte_errno;
}
if (use_app_rss_key &&
(dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
rss_hash_default_key_len)) {
/* MLX5 RSS only support 40bytes key. */
rte_errno = EINVAL;
return -rte_errno;
}
priv->rss_conf.rss_key =
rte_realloc(priv->rss_conf.rss_key,
rss_hash_default_key_len, 0);
if (!priv->rss_conf.rss_key) {
ERROR("cannot allocate RSS hash key memory (%u)", rxqs_n);
rte_errno = ENOMEM;
return -rte_errno;
}
memcpy(priv->rss_conf.rss_key,
use_app_rss_key ?
dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key :
rss_hash_default_key,
rss_hash_default_key_len);
priv->rss_conf.rss_key_len = rss_hash_default_key_len;
priv->rss_conf.rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
priv->rxqs = (void *)dev->data->rx_queues;
priv->txqs = (void *)dev->data->tx_queues;
if (txqs_n != priv->txqs_n) {
INFO("%p: TX queues number update: %u -> %u",
(void *)dev, priv->txqs_n, txqs_n);
priv->txqs_n = txqs_n;
}
if (rxqs_n > priv->config.ind_table_max_size) {
ERROR("cannot handle this many RX queues (%u)", rxqs_n);
rte_errno = EINVAL;
return -rte_errno;
}
if (rxqs_n == priv->rxqs_n)
return 0;
INFO("%p: RX queues number update: %u -> %u",
(void *)dev, priv->rxqs_n, rxqs_n);
priv->rxqs_n = rxqs_n;
/* If the requested number of RX queues is not a power of two, use the
* maximum indirection table size for better balancing.
* The result is always rounded to the next power of two. */
reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
priv->config.ind_table_max_size :
rxqs_n));
ret = mlx5_rss_reta_index_resize(dev, reta_idx_n);
if (ret)
return ret;
/* When the number of RX queues is not a power of two, the remaining
* table entries are padded with reused WQs and hashes are not spread
* uniformly. */
for (i = 0, j = 0; (i != reta_idx_n); ++i) {
(*priv->reta_idx)[i] = j;
if (++j == rxqs_n)
j = 0;
}
return 0;
}
/**
* DPDK callback to get information about the device.
*
* @param dev
* Pointer to Ethernet device structure.
* @param[out] info
* Info structure output buffer.
*/
void
mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
{
struct priv *priv = dev->data->dev_private;
struct mlx5_dev_config *config = &priv->config;
unsigned int max;
char ifname[IF_NAMESIZE];
info->pci_dev = RTE_ETH_DEV_TO_PCI(dev);
/* FIXME: we should ask the device for these values. */
info->min_rx_bufsize = 32;
info->max_rx_pktlen = 65536;
/*
* Since we need one CQ per QP, the limit is the minimum number
* between the two values.
*/
max = RTE_MIN(priv->device_attr.orig_attr.max_cq,
priv->device_attr.orig_attr.max_qp);
/* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
if (max >= 65535)
max = 65535;
info->max_rx_queues = max;
info->max_tx_queues = max;
info->max_mac_addrs = RTE_DIM(priv->mac);
info->rx_queue_offload_capa = mlx5_get_rx_queue_offloads(dev);
info->rx_offload_capa = (mlx5_get_rx_port_offloads() |
info->rx_queue_offload_capa);
info->tx_offload_capa = mlx5_get_tx_port_offloads(dev);
if (mlx5_get_ifname(dev, &ifname) == 0)
info->if_index = if_nametoindex(ifname);
info->reta_size = priv->reta_idx_n ?
priv->reta_idx_n : config->ind_table_max_size;
info->hash_key_size = priv->rss_conf.rss_key_len;
info->speed_capa = priv->link_speed_capa;
info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
}
/**
* Get supported packet types.
*
* @param dev
* Pointer to Ethernet device structure.
*
* @return
* A pointer to the supported Packet types array.
*/
const uint32_t *
mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
{
static const uint32_t ptypes[] = {
/* refers to rxq_cq_to_pkt_type() */
RTE_PTYPE_L2_ETHER,
RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
RTE_PTYPE_L4_NONFRAG,
RTE_PTYPE_L4_FRAG,
RTE_PTYPE_L4_TCP,
RTE_PTYPE_L4_UDP,
RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
RTE_PTYPE_INNER_L4_NONFRAG,
RTE_PTYPE_INNER_L4_FRAG,
RTE_PTYPE_INNER_L4_TCP,
RTE_PTYPE_INNER_L4_UDP,
RTE_PTYPE_UNKNOWN
};
if (dev->rx_pkt_burst == mlx5_rx_burst ||
dev->rx_pkt_burst == mlx5_rx_burst_vec)
return ptypes;
return NULL;
}
/**
* DPDK callback to retrieve physical link information.
*
* @param dev
* Pointer to Ethernet device structure.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
static int
mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
struct ethtool_cmd edata = {
.cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
};
struct ifreq ifr;
struct rte_eth_link dev_link;
int link_speed = 0;
int ret;
ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
if (ret) {
WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(rte_errno));
return ret;
}
memset(&dev_link, 0, sizeof(dev_link));
dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
(ifr.ifr_flags & IFF_RUNNING));
ifr.ifr_data = (void *)&edata;
ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
if (ret) {
WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
strerror(rte_errno));
return ret;
}
link_speed = ethtool_cmd_speed(&edata);
if (link_speed == -1)
dev_link.link_speed = 0;
else
dev_link.link_speed = link_speed;
priv->link_speed_capa = 0;
if (edata.supported & SUPPORTED_Autoneg)
priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
if (edata.supported & (SUPPORTED_1000baseT_Full |
SUPPORTED_1000baseKX_Full))
priv->link_speed_capa |= ETH_LINK_SPEED_1G;
if (edata.supported & SUPPORTED_10000baseKR_Full)
priv->link_speed_capa |= ETH_LINK_SPEED_10G;
if (edata.supported & (SUPPORTED_40000baseKR4_Full |
SUPPORTED_40000baseCR4_Full |
SUPPORTED_40000baseSR4_Full |
SUPPORTED_40000baseLR4_Full))
priv->link_speed_capa |= ETH_LINK_SPEED_40G;
dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
ETH_LINK_SPEED_FIXED);
if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
/* Link status changed. */
dev->data->dev_link = dev_link;
return 0;
}
/* Link status is still the same. */
rte_errno = EAGAIN;
return -rte_errno;
}
/**
* Retrieve physical link information (unlocked version using new ioctl).
*
* @param dev
* Pointer to Ethernet device structure.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
static int
mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
struct ifreq ifr;
struct rte_eth_link dev_link;
uint64_t sc;
int ret;
ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
if (ret) {
WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(rte_errno));
return ret;
}
memset(&dev_link, 0, sizeof(dev_link));
dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
(ifr.ifr_flags & IFF_RUNNING));
ifr.ifr_data = (void *)&gcmd;
ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
if (ret) {
DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
strerror(rte_errno));
return ret;
}
gcmd.link_mode_masks_nwords = -gcmd.link_mode_masks_nwords;
alignas(struct ethtool_link_settings)
uint8_t data[offsetof(struct ethtool_link_settings, link_mode_masks) +
sizeof(uint32_t) * gcmd.link_mode_masks_nwords * 3];
struct ethtool_link_settings *ecmd = (void *)data;
*ecmd = gcmd;
ifr.ifr_data = (void *)ecmd;
ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
if (ret) {
DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
strerror(rte_errno));
return ret;
}
dev_link.link_speed = ecmd->speed;
sc = ecmd->link_mode_masks[0] |
((uint64_t)ecmd->link_mode_masks[1] << 32);
priv->link_speed_capa = 0;
if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
priv->link_speed_capa |= ETH_LINK_SPEED_1G;
if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
priv->link_speed_capa |= ETH_LINK_SPEED_10G;
if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
priv->link_speed_capa |= ETH_LINK_SPEED_20G;
if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
priv->link_speed_capa |= ETH_LINK_SPEED_40G;
if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
priv->link_speed_capa |= ETH_LINK_SPEED_56G;
if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
priv->link_speed_capa |= ETH_LINK_SPEED_25G;
if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
priv->link_speed_capa |= ETH_LINK_SPEED_50G;
if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
priv->link_speed_capa |= ETH_LINK_SPEED_100G;
dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
ETH_LINK_SPEED_FIXED);
if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
/* Link status changed. */
dev->data->dev_link = dev_link;
return 0;
}
/* Link status is still the same. */
rte_errno = EAGAIN;
return -rte_errno;
}
/**
* Enable receiving and transmitting traffic.
*
* @param dev
* Pointer to Ethernet device.
*/
static void
mlx5_link_start(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
int ret;
dev->tx_pkt_burst = mlx5_select_tx_function(dev);
dev->rx_pkt_burst = mlx5_select_rx_function(dev);
ret = mlx5_traffic_enable(dev);
if (ret) {
ERROR("%p: error occurred while configuring control flows: %s",
(void *)dev, strerror(rte_errno));
return;
}
ret = mlx5_flow_start(dev, &priv->flows);
if (ret) {
ERROR("%p: error occurred while configuring flows: %s",
(void *)dev, strerror(rte_errno));
}
}
/**
* Disable receiving and transmitting traffic.
*
* @param dev
* Pointer to Ethernet device.
*/
static void
mlx5_link_stop(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
mlx5_flow_stop(dev, &priv->flows);
mlx5_traffic_disable(dev);
dev->rx_pkt_burst = removed_rx_burst;
dev->tx_pkt_burst = removed_tx_burst;
}
/**
* Querying the link status till it changes to the desired state.
* Number of query attempts is bounded by MLX5_MAX_LINK_QUERY_ATTEMPTS.
*
* @param dev
* Pointer to Ethernet device.
* @param status
* Link desired status.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_force_link_status_change(struct rte_eth_dev *dev, int status)
{
int try = 0;
while (try < MLX5_MAX_LINK_QUERY_ATTEMPTS) {
mlx5_link_update(dev, 0);
if (dev->data->dev_link.link_status == status)
return 0;
try++;
sleep(1);
}
rte_errno = EAGAIN;
return -rte_errno;
}
/**
* DPDK callback to retrieve physical link information.
*
* @param dev
* Pointer to Ethernet device structure.
* @param wait_to_complete
* Wait for request completion (ignored).
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
{
struct utsname utsname;
int ver[3];
int ret;
struct rte_eth_link dev_link = dev->data->dev_link;
if (uname(&utsname) == -1 ||
sscanf(utsname.release, "%d.%d.%d",
&ver[0], &ver[1], &ver[2]) != 3 ||
KERNEL_VERSION(ver[0], ver[1], ver[2]) < KERNEL_VERSION(4, 9, 0))
ret = mlx5_link_update_unlocked_gset(dev);
else
ret = mlx5_link_update_unlocked_gs(dev);
if (ret)
return ret;
/* If lsc interrupt is disabled, should always be ready for traffic. */
if (!dev->data->dev_conf.intr_conf.lsc) {
mlx5_link_start(dev);
return 0;
}
/* Re-select burst callbacks only if link status has been changed. */
if (!ret && dev_link.link_status != dev->data->dev_link.link_status) {
if (dev->data->dev_link.link_status == ETH_LINK_UP)
mlx5_link_start(dev);
else
mlx5_link_stop(dev);
}
return 0;
}
/**
* DPDK callback to change the MTU.
*
* @param dev
* Pointer to Ethernet device structure.
* @param in_mtu
* New MTU.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
{
struct priv *priv = dev->data->dev_private;
uint16_t kern_mtu = 0;
int ret;
ret = mlx5_get_mtu(dev, &kern_mtu);
if (ret)
return ret;
/* Set kernel interface MTU first. */
ret = mlx5_set_mtu(dev, mtu);
if (ret)
return ret;
ret = mlx5_get_mtu(dev, &kern_mtu);
if (ret)
return ret;
if (kern_mtu == mtu) {
priv->mtu = mtu;
DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
return 0;
}
rte_errno = EAGAIN;
return -rte_errno;
}
/**
* DPDK callback to get flow control status.
*
* @param dev
* Pointer to Ethernet device structure.
* @param[out] fc_conf
* Flow control output buffer.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
{
struct ifreq ifr;
struct ethtool_pauseparam ethpause = {
.cmd = ETHTOOL_GPAUSEPARAM
};
int ret;
ifr.ifr_data = (void *)&ethpause;
ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
if (ret) {
WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM) failed: %s",
strerror(rte_errno));
return ret;
}
fc_conf->autoneg = ethpause.autoneg;
if (ethpause.rx_pause && ethpause.tx_pause)
fc_conf->mode = RTE_FC_FULL;
else if (ethpause.rx_pause)
fc_conf->mode = RTE_FC_RX_PAUSE;
else if (ethpause.tx_pause)
fc_conf->mode = RTE_FC_TX_PAUSE;
else
fc_conf->mode = RTE_FC_NONE;
return 0;
}
/**
* DPDK callback to modify flow control parameters.
*
* @param dev
* Pointer to Ethernet device structure.
* @param[in] fc_conf
* Flow control parameters.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
{
struct ifreq ifr;
struct ethtool_pauseparam ethpause = {
.cmd = ETHTOOL_SPAUSEPARAM
};
int ret;
ifr.ifr_data = (void *)&ethpause;
ethpause.autoneg = fc_conf->autoneg;
if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
(fc_conf->mode & RTE_FC_RX_PAUSE))
ethpause.rx_pause = 1;
else
ethpause.rx_pause = 0;
if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
(fc_conf->mode & RTE_FC_TX_PAUSE))
ethpause.tx_pause = 1;
else
ethpause.tx_pause = 0;
ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
if (ret) {
WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
" failed: %s",
strerror(rte_errno));
return ret;
}
return 0;
}
/**
* Get PCI information from struct ibv_device.
*
* @param device
* Pointer to Ethernet device structure.
* @param[out] pci_addr
* PCI bus address output buffer.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
struct rte_pci_addr *pci_addr)
{
FILE *file;
char line[32];
MKSTR(path, "%s/device/uevent", device->ibdev_path);
file = fopen(path, "rb");
if (file == NULL) {
rte_errno = errno;
return -rte_errno;
}
while (fgets(line, sizeof(line), file) == line) {
size_t len = strlen(line);
int ret;
/* Truncate long lines. */
if (len == (sizeof(line) - 1))
while (line[(len - 1)] != '\n') {
ret = fgetc(file);
if (ret == EOF)
break;
line[(len - 1)] = ret;
}
/* Extract information. */
if (sscanf(line,
"PCI_SLOT_NAME="
"%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
&pci_addr->domain,
&pci_addr->bus,
&pci_addr->devid,
&pci_addr->function) == 4) {
ret = 0;
break;
}
}
fclose(file);
return 0;
}
/**
* Update the link status.
*
* @param dev
* Pointer to Ethernet device.
*
* @return
* Zero if the callback process can be called immediately, negative errno
* value otherwise and rte_errno is set.
*/
static int
mlx5_link_status_update(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
struct rte_eth_link *link = &dev->data->dev_link;
int ret;
ret = mlx5_link_update(dev, 0);
if (ret)
return ret;
if (((link->link_speed == 0) && link->link_status) ||
((link->link_speed != 0) && !link->link_status)) {
/*
* Inconsistent status. Event likely occurred before the
* kernel netdevice exposes the new status.
*/
if (!priv->pending_alarm) {
priv->pending_alarm = 1;
rte_eal_alarm_set(MLX5_ALARM_TIMEOUT_US,
mlx5_dev_link_status_handler,
priv->dev);
}
return 1;
} else if (unlikely(priv->pending_alarm)) {
/* Link interrupt occurred while alarm is already scheduled. */
priv->pending_alarm = 0;
rte_eal_alarm_cancel(mlx5_dev_link_status_handler, priv->dev);
}
return 0;
}
/**
* Device status handler.
*
* @param dev
* Pointer to Ethernet device.
* @param events
* Pointer to event flags holder.
*
* @return
* Events bitmap of callback process which can be called immediately.
*/
static uint32_t
mlx5_dev_status_handler(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
struct ibv_async_event event;
uint32_t ret = 0;
/* Read all message and acknowledge them. */
for (;;) {
if (mlx5_glue->get_async_event(priv->ctx, &event))
break;
if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
event.event_type == IBV_EVENT_PORT_ERR) &&
(dev->data->dev_conf.intr_conf.lsc == 1))
ret |= (1 << RTE_ETH_EVENT_INTR_LSC);
else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
dev->data->dev_conf.intr_conf.rmv == 1)
ret |= (1 << RTE_ETH_EVENT_INTR_RMV);
else
DEBUG("event type %d on port %d not handled",
event.event_type, event.element.port_num);
mlx5_glue->ack_async_event(&event);
}
if (ret & (1 << RTE_ETH_EVENT_INTR_LSC))
if (mlx5_link_status_update(dev))
ret &= ~(1 << RTE_ETH_EVENT_INTR_LSC);
return ret;
}
/**
* Handle delayed link status event.
*
* @param arg
* Registered argument.
*/
void
mlx5_dev_link_status_handler(void *arg)
{
struct rte_eth_dev *dev = arg;
struct priv *priv = dev->data->dev_private;
int ret;
priv->pending_alarm = 0;
ret = mlx5_link_status_update(dev);
if (!ret)
_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
}
/**
* Handle interrupts from the NIC.
*
* @param[in] intr_handle
* Interrupt handler.
* @param cb_arg
* Callback argument.
*/
void
mlx5_dev_interrupt_handler(void *cb_arg)
{
struct rte_eth_dev *dev = cb_arg;
uint32_t events;
events = mlx5_dev_status_handler(dev);
if (events & (1 << RTE_ETH_EVENT_INTR_LSC))
_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
if (events & (1 << RTE_ETH_EVENT_INTR_RMV))
_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RMV, NULL);
}
/**
* Handle interrupts from the socket.
*
* @param cb_arg
* Callback argument.
*/
static void
mlx5_dev_handler_socket(void *cb_arg)
{
struct rte_eth_dev *dev = cb_arg;
mlx5_socket_handle(dev);
}
/**
* Uninstall interrupt handler.
*
* @param dev
* Pointer to Ethernet device.
*/
void
mlx5_dev_interrupt_handler_uninstall(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
if (dev->data->dev_conf.intr_conf.lsc ||
dev->data->dev_conf.intr_conf.rmv)
rte_intr_callback_unregister(&priv->intr_handle,
mlx5_dev_interrupt_handler, dev);
if (priv->primary_socket)
rte_intr_callback_unregister(&priv->intr_handle_socket,
mlx5_dev_handler_socket, dev);
if (priv->pending_alarm) {
priv->pending_alarm = 0;
rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev);
}
priv->intr_handle.fd = 0;
priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
priv->intr_handle_socket.fd = 0;
priv->intr_handle_socket.type = RTE_INTR_HANDLE_UNKNOWN;
}
/**
* Install interrupt handler.
*
* @param dev
* Pointer to Ethernet device.
*/
void
mlx5_dev_interrupt_handler_install(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
int ret;
int flags;
assert(priv->ctx->async_fd > 0);
flags = fcntl(priv->ctx->async_fd, F_GETFL);
ret = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
if (ret) {
INFO("failed to change file descriptor async event queue");
dev->data->dev_conf.intr_conf.lsc = 0;
dev->data->dev_conf.intr_conf.rmv = 0;
}
if (dev->data->dev_conf.intr_conf.lsc ||
dev->data->dev_conf.intr_conf.rmv) {
priv->intr_handle.fd = priv->ctx->async_fd;
priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
rte_intr_callback_register(&priv->intr_handle,
mlx5_dev_interrupt_handler, dev);
}
ret = mlx5_socket_init(dev);
if (ret)
ERROR("cannot initialise socket: %s", strerror(rte_errno));
else if (priv->primary_socket) {
priv->intr_handle_socket.fd = priv->primary_socket;
priv->intr_handle_socket.type = RTE_INTR_HANDLE_EXT;
rte_intr_callback_register(&priv->intr_handle_socket,
mlx5_dev_handler_socket, dev);
}
}
/**
* DPDK callback to bring the link DOWN.
*
* @param dev
* Pointer to Ethernet device structure.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_set_link_down(struct rte_eth_dev *dev)
{
return mlx5_set_flags(dev, ~IFF_UP, ~IFF_UP);
}
/**
* DPDK callback to bring the link UP.
*
* @param dev
* Pointer to Ethernet device structure.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_set_link_up(struct rte_eth_dev *dev)
{
return mlx5_set_flags(dev, ~IFF_UP, IFF_UP);
}
/**
* Configure the TX function to use.
*
* @param dev
* Pointer to private data structure.
*
* @return
* Pointer to selected Tx burst function.
*/
eth_tx_burst_t
mlx5_select_tx_function(struct rte_eth_dev *dev)
{
struct priv *priv = dev->data->dev_private;
eth_tx_burst_t tx_pkt_burst = mlx5_tx_burst;
struct mlx5_dev_config *config = &priv->config;
uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
int tso = !!(tx_offloads & (DEV_TX_OFFLOAD_TCP_TSO |
DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
DEV_TX_OFFLOAD_GRE_TNL_TSO));
int vlan_insert = !!(tx_offloads & DEV_TX_OFFLOAD_VLAN_INSERT);
assert(priv != NULL);
/* Select appropriate TX function. */
if (vlan_insert || tso)
return tx_pkt_burst;
if (config->mps == MLX5_MPW_ENHANCED) {
if (mlx5_check_vec_tx_support(dev) > 0) {
if (mlx5_check_raw_vec_tx_support(dev) > 0)
tx_pkt_burst = mlx5_tx_burst_raw_vec;
else
tx_pkt_burst = mlx5_tx_burst_vec;
DEBUG("selected Enhanced MPW TX vectorized function");
} else {
tx_pkt_burst = mlx5_tx_burst_empw;
DEBUG("selected Enhanced MPW TX function");
}
} else if (config->mps && (config->txq_inline > 0)) {
tx_pkt_burst = mlx5_tx_burst_mpw_inline;
DEBUG("selected MPW inline TX function");
} else if (config->mps) {
tx_pkt_burst = mlx5_tx_burst_mpw;
DEBUG("selected MPW TX function");
}
return tx_pkt_burst;
}
/**
* Configure the RX function to use.
*
* @param dev
* Pointer to private data structure.
*
* @return
* Pointer to selected Rx burst function.
*/
eth_rx_burst_t
mlx5_select_rx_function(struct rte_eth_dev *dev)
{
eth_rx_burst_t rx_pkt_burst = mlx5_rx_burst;
assert(dev != NULL);
if (mlx5_check_vec_rx_support(dev) > 0) {
rx_pkt_burst = mlx5_rx_burst_vec;
DEBUG("selected RX vectorized function");
}
return rx_pkt_burst;
}
/**
* Check if mlx5 device was removed.
*
* @param dev
* Pointer to Ethernet device structure.
*
* @return
* 1 when device is removed, otherwise 0.
*/
int
mlx5_is_removed(struct rte_eth_dev *dev)
{
struct ibv_device_attr device_attr;
struct priv *priv = dev->data->dev_private;
if (mlx5_glue->query_device(priv->ctx, &device_attr) == EIO)
return 1;
return 0;
}
Reference in New Issue View Git Blame Copy Permalink