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numam-dpdk/drivers/net/mlx5/mlx5_ethdev.c
Xiaoyu Min 6fd05da9ef net/mlx5: fix link speed info when link is down 
When the link is down, the link speed returned by ethtool is
UINT32_MAX and the link status is 0.

In this case, the DPDK ethdev link speed should be set to
ETH_SPEED_NUM_NONE.
Otherwise since link speed is non-zero but link status is zero, this
is an inconsistent situation and -EAGAIN is returned, which is not right.

Fixes: 1884087198 ("net/mlx5: fix support for newer link speeds")
Cc: stable@dpdk.org

Signed-off-by: Xiaoyu Min <jackmin@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
2019-08-06 17:42:12 +02:00

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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2015 6WIND S.A.
* Copyright 2015 Mellanox Technologies, Ltd
*/
#include <stddef.h>
#include <assert.h>
#include <inttypes.h>
#include <unistd.h>
#include <stdbool.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 <netinet/in.h>
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include <fcntl.h>
#include <stdalign.h>
#include <sys/un.h>
#include <time.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_malloc.h>
#include <rte_string_fns.h>
#include <rte_rwlock.h>
#include <rte_cycles.h>
#include "mlx5.h"
#include "mlx5_glue.h"
#include "mlx5_rxtx.h"
#include "mlx5_utils.h"
/* Supported speed values found in /usr/include/linux/ethtool.h */
#ifndef HAVE_SUPPORTED_40000baseKR4_Full
#define SUPPORTED_40000baseKR4_Full (1 << 23)
#endif
#ifndef HAVE_SUPPORTED_40000baseCR4_Full
#define SUPPORTED_40000baseCR4_Full (1 << 24)
#endif
#ifndef HAVE_SUPPORTED_40000baseSR4_Full
#define SUPPORTED_40000baseSR4_Full (1 << 25)
#endif
#ifndef HAVE_SUPPORTED_40000baseLR4_Full
#define SUPPORTED_40000baseLR4_Full (1 << 26)
#endif
#ifndef HAVE_SUPPORTED_56000baseKR4_Full
#define SUPPORTED_56000baseKR4_Full (1 << 27)
#endif
#ifndef HAVE_SUPPORTED_56000baseCR4_Full
#define SUPPORTED_56000baseCR4_Full (1 << 28)
#endif
#ifndef HAVE_SUPPORTED_56000baseSR4_Full
#define SUPPORTED_56000baseSR4_Full (1 << 29)
#endif
#ifndef HAVE_SUPPORTED_56000baseLR4_Full
#define SUPPORTED_56000baseLR4_Full (1 << 30)
#endif
/* 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 master 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_master_ifname(const char *ibdev_path, char (*ifname)[IF_NAMESIZE])
{
DIR *dir;
struct dirent *dent;
unsigned int dev_type = 0;
unsigned int dev_port_prev = ~0u;
char match[IF_NAMESIZE] = "";
assert(ibdev_path);
{
MKSTR(path, "%s/device/net", 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",
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 == 0)
strlcpy(match, name, sizeof(match));
}
closedir(dir);
if (match[0] == '\0') {
rte_errno = ENOENT;
return -rte_errno;
}
strncpy(*ifname, match, sizeof(*ifname));
return 0;
}
/**
* Get interface name from private structure.
*
* This is a port representor-aware version of mlx5_get_master_ifname().
*
* @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 mlx5_priv *priv = dev->data->dev_private;
unsigned int ifindex;
assert(priv);
assert(priv->sh);
ifindex = mlx5_ifindex(dev);
if (!ifindex) {
if (!priv->representor)
return mlx5_get_master_ifname(priv->sh->ibdev_path,
ifname);
rte_errno = ENXIO;
return -rte_errno;
}
if (if_indextoname(ifindex, &(*ifname)[0]))
return 0;
rte_errno = errno;
return -rte_errno;
}
/**
* Get the interface index from device name.
*
* @param[in] dev
* Pointer to Ethernet device.
*
* @return
* Nonzero interface index on success, zero otherwise and rte_errno is set.
*/
unsigned int
mlx5_ifindex(const struct rte_eth_dev *dev)
{
struct mlx5_priv *priv = dev->data->dev_private;
unsigned int ifindex;
assert(priv);
assert(priv->if_index);
ifindex = priv->if_index;
if (!ifindex)
rte_errno = ENXIO;
return ifindex;
}
/**
* 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 mlx5_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;
int ret = 0;
if (use_app_rss_key &&
(dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key_len !=
MLX5_RSS_HASH_KEY_LEN)) {
DRV_LOG(ERR, "port %u RSS key len must be %s Bytes long",
dev->data->port_id, RTE_STR(MLX5_RSS_HASH_KEY_LEN));
rte_errno = EINVAL;
return -rte_errno;
}
priv->rss_conf.rss_key =
rte_realloc(priv->rss_conf.rss_key,
MLX5_RSS_HASH_KEY_LEN, 0);
if (!priv->rss_conf.rss_key) {
DRV_LOG(ERR, "port %u cannot allocate RSS hash key memory (%u)",
dev->data->port_id, 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,
MLX5_RSS_HASH_KEY_LEN);
priv->rss_conf.rss_key_len = MLX5_RSS_HASH_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) {
DRV_LOG(INFO, "port %u Tx queues number update: %u -> %u",
dev->data->port_id, priv->txqs_n, txqs_n);
priv->txqs_n = txqs_n;
}
if (rxqs_n > priv->config.ind_table_max_size) {
DRV_LOG(ERR, "port %u cannot handle this many Rx queues (%u)",
dev->data->port_id, rxqs_n);
rte_errno = EINVAL;
return -rte_errno;
}
if (rxqs_n != priv->rxqs_n) {
DRV_LOG(INFO, "port %u Rx queues number update: %u -> %u",
dev->data->port_id, 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;
}
}
ret = mlx5_proc_priv_init(dev);
if (ret)
return ret;
return 0;
}
/**
* Sets default tuning parameters.
*
* @param dev
* Pointer to Ethernet device.
* @param[out] info
* Info structure output buffer.
*/
static void
mlx5_set_default_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
{
struct mlx5_priv *priv = dev->data->dev_private;
/* Minimum CPU utilization. */
info->default_rxportconf.ring_size = 256;
info->default_txportconf.ring_size = 256;
info->default_rxportconf.burst_size = 64;
info->default_txportconf.burst_size = 64;
if (priv->link_speed_capa & ETH_LINK_SPEED_100G) {
info->default_rxportconf.nb_queues = 16;
info->default_txportconf.nb_queues = 16;
if (dev->data->nb_rx_queues > 2 ||
dev->data->nb_tx_queues > 2) {
/* Max Throughput. */
info->default_rxportconf.ring_size = 2048;
info->default_txportconf.ring_size = 2048;
}
} else {
info->default_rxportconf.nb_queues = 8;
info->default_txportconf.nb_queues = 8;
if (dev->data->nb_rx_queues > 2 ||
dev->data->nb_tx_queues > 2) {
/* Max Throughput. */
info->default_rxportconf.ring_size = 4096;
info->default_txportconf.ring_size = 4096;
}
}
}
/**
* Sets tx mbuf limiting parameters.
*
* @param dev
* Pointer to Ethernet device.
* @param[out] info
* Info structure output buffer.
*/
static void
mlx5_set_txlimit_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
{
struct mlx5_priv *priv = dev->data->dev_private;
struct mlx5_dev_config *config = &priv->config;
unsigned int inlen;
uint16_t nb_max;
inlen = (config->txq_inline_max == MLX5_ARG_UNSET) ?
MLX5_SEND_DEF_INLINE_LEN :
(unsigned int)config->txq_inline_max;
assert(config->txq_inline_min >= 0);
inlen = RTE_MAX(inlen, (unsigned int)config->txq_inline_min);
inlen = RTE_MIN(inlen, MLX5_WQE_SIZE_MAX +
MLX5_ESEG_MIN_INLINE_SIZE -
MLX5_WQE_CSEG_SIZE -
MLX5_WQE_ESEG_SIZE -
MLX5_WQE_DSEG_SIZE * 2);
nb_max = (MLX5_WQE_SIZE_MAX +
MLX5_ESEG_MIN_INLINE_SIZE -
MLX5_WQE_CSEG_SIZE -
MLX5_WQE_ESEG_SIZE -
MLX5_WQE_DSEG_SIZE -
inlen) / MLX5_WSEG_SIZE;
info->tx_desc_lim.nb_seg_max = nb_max;
info->tx_desc_lim.nb_mtu_seg_max = nb_max;
}
/**
* 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 mlx5_priv *priv = dev->data->dev_private;
struct mlx5_dev_config *config = &priv->config;
unsigned int max;
/* 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->sh->device_attr.orig_attr.max_cq,
priv->sh->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 = MLX5_MAX_UC_MAC_ADDRESSES;
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);
info->if_index = mlx5_ifindex(dev);
info->reta_size = priv->reta_idx_n ?
priv->reta_idx_n : config->ind_table_max_size;
info->hash_key_size = MLX5_RSS_HASH_KEY_LEN;
info->speed_capa = priv->link_speed_capa;
info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
mlx5_set_default_params(dev, info);
mlx5_set_txlimit_params(dev, info);
info->switch_info.name = dev->data->name;
info->switch_info.domain_id = priv->domain_id;
info->switch_info.port_id = priv->representor_id;
if (priv->representor) {
unsigned int i = mlx5_dev_to_port_id(dev->device, NULL, 0);
uint16_t port_id[i];
i = RTE_MIN(mlx5_dev_to_port_id(dev->device, port_id, i), i);
while (i--) {
struct mlx5_priv *opriv =
rte_eth_devices[port_id[i]].data->dev_private;
if (!opriv ||
opriv->representor ||
opriv->domain_id != priv->domain_id)
continue;
/*
* Override switch name with that of the master
* device.
*/
info->switch_info.name = opriv->dev_data->name;
break;
}
}
}
/**
* Get device current raw clock counter
*
* @param dev
* Pointer to Ethernet device structure.
* @param[out] time
* Current raw clock counter of the device.
*
* @return
* 0 if the clock has correctly been read
* The value of errno in case of error
*/
int
mlx5_read_clock(struct rte_eth_dev *dev, uint64_t *clock)
{
struct mlx5_priv *priv = dev->data->dev_private;
struct ibv_context *ctx = priv->sh->ctx;
struct ibv_values_ex values;
int err = 0;
values.comp_mask = IBV_VALUES_MASK_RAW_CLOCK;
err = mlx5_glue->query_rt_values_ex(ctx, &values);
if (err != 0) {
DRV_LOG(WARNING, "Could not query the clock !");
return err;
}
*clock = values.raw_clock.tv_nsec;
return 0;
}
/**
* Get firmware version of a device.
*
* @param dev
* Ethernet device port.
* @param fw_ver
* String output allocated by caller.
* @param fw_size
* Size of the output string, including terminating null byte.
*
* @return
* 0 on success, or the size of the non truncated string if too big.
*/
int mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size)
{
struct mlx5_priv *priv = dev->data->dev_private;
struct ibv_device_attr *attr = &priv->sh->device_attr.orig_attr;
size_t size = strnlen(attr->fw_ver, sizeof(attr->fw_ver)) + 1;
if (fw_size < size)
return size;
if (fw_ver != NULL)
strlcpy(fw_ver, attr->fw_ver, fw_size);
return 0;
}
/**
* 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_mprq ||
dev->rx_pkt_burst == mlx5_rx_burst_vec)
return ptypes;
return NULL;
}
/**
* Retrieve the master device for representor in the same switch domain.
*
* @param dev
* Pointer to representor Ethernet device structure.
*
* @return
* Master device structure on success, NULL otherwise.
*/
static struct rte_eth_dev *
mlx5_find_master_dev(struct rte_eth_dev *dev)
{
struct mlx5_priv *priv;
uint16_t port_id;
uint16_t domain_id;
priv = dev->data->dev_private;
domain_id = priv->domain_id;
assert(priv->representor);
RTE_ETH_FOREACH_DEV_OF(port_id, dev->device) {
priv = rte_eth_devices[port_id].data->dev_private;
if (priv &&
priv->master &&
priv->domain_id == domain_id)
return &rte_eth_devices[port_id];
}
return NULL;
}
/**
* DPDK callback to retrieve physical link information.
*
* @param dev
* Pointer to Ethernet device structure.
* @param[out] link
* Storage for current link status.
*
* @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 rte_eth_link *link)
{
struct mlx5_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) {
DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
dev->data->port_id, strerror(rte_errno));
return ret;
}
dev_link = (struct rte_eth_link) {
.link_status = ((ifr.ifr_flags & IFF_UP) &&
(ifr.ifr_flags & IFF_RUNNING)),
};
ifr = (struct ifreq) {
.ifr_data = (void *)&edata,
};
ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
if (ret) {
if (ret == -ENOTSUP && priv->representor) {
struct rte_eth_dev *master;
/*
* For representors we can try to inherit link
* settings from the master device. Actually
* link settings do not make a lot of sense
* for representors due to missing physical
* link. The old kernel drivers supported
* emulated settings query for representors,
* the new ones do not, so we have to add
* this code for compatibility issues.
*/
master = mlx5_find_master_dev(dev);
if (master) {
ifr = (struct ifreq) {
.ifr_data = (void *)&edata,
};
ret = mlx5_ifreq(master, SIOCETHTOOL, &ifr);
}
}
if (ret) {
DRV_LOG(WARNING,
"port %u ioctl(SIOCETHTOOL,"
" ETHTOOL_GSET) failed: %s",
dev->data->port_id, strerror(rte_errno));
return ret;
}
}
link_speed = ethtool_cmd_speed(&edata);
if (link_speed == -1)
dev_link.link_speed = ETH_SPEED_NUM_NONE;
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 (((dev_link.link_speed && !dev_link.link_status) ||
(!dev_link.link_speed && dev_link.link_status))) {
rte_errno = EAGAIN;
return -rte_errno;
}
*link = dev_link;
return 0;
}
/**
* Retrieve physical link information (unlocked version using new ioctl).
*
* @param dev
* Pointer to Ethernet device structure.
* @param[out] link
* Storage for current link status.
*
* @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 rte_eth_link *link)
{
struct mlx5_priv *priv = dev->data->dev_private;
struct ethtool_link_settings gcmd = { .cmd = ETHTOOL_GLINKSETTINGS };
struct ifreq ifr;
struct rte_eth_link dev_link;
struct rte_eth_dev *master = NULL;
uint64_t sc;
int ret;
ret = mlx5_ifreq(dev, SIOCGIFFLAGS, &ifr);
if (ret) {
DRV_LOG(WARNING, "port %u ioctl(SIOCGIFFLAGS) failed: %s",
dev->data->port_id, strerror(rte_errno));
return ret;
}
dev_link = (struct rte_eth_link) {
.link_status = ((ifr.ifr_flags & IFF_UP) &&
(ifr.ifr_flags & IFF_RUNNING)),
};
ifr = (struct ifreq) {
.ifr_data = (void *)&gcmd,
};
ret = mlx5_ifreq(dev, SIOCETHTOOL, &ifr);
if (ret) {
if (ret == -ENOTSUP && priv->representor) {
/*
* For representors we can try to inherit link
* settings from the master device. Actually
* link settings do not make a lot of sense
* for representors due to missing physical
* link. The old kernel drivers supported
* emulated settings query for representors,
* the new ones do not, so we have to add
* this code for compatibility issues.
*/
master = mlx5_find_master_dev(dev);
if (master) {
ifr = (struct ifreq) {
.ifr_data = (void *)&gcmd,
};
ret = mlx5_ifreq(master, SIOCETHTOOL, &ifr);
}
}
if (ret) {
DRV_LOG(DEBUG,
"port %u ioctl(SIOCETHTOOL,"
" ETHTOOL_GLINKSETTINGS) failed: %s",
dev->data->port_id, 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(master ? master : dev, SIOCETHTOOL, &ifr);
if (ret) {
DRV_LOG(DEBUG,
"port %u ioctl(SIOCETHTOOL,"
"ETHTOOL_GLINKSETTINGS) failed: %s",
dev->data->port_id, strerror(rte_errno));
return ret;
}
dev_link.link_speed = (ecmd->speed == UINT32_MAX) ? ETH_SPEED_NUM_NONE :
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 (((dev_link.link_speed && !dev_link.link_status) ||
(!dev_link.link_speed && dev_link.link_status))) {
rte_errno = EAGAIN;
return -rte_errno;
}
*link = dev_link;
return 0;
}
/**
* DPDK callback to retrieve physical link information.
*
* @param dev
* Pointer to Ethernet device structure.
* @param wait_to_complete
* Wait for request completion.
*
* @return
* 0 if link status was not updated, positive if it was, a negative errno
* value otherwise and rte_errno is set.
*/
int
mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
{
int ret;
struct rte_eth_link dev_link;
time_t start_time = time(NULL);
do {
ret = mlx5_link_update_unlocked_gs(dev, &dev_link);
if (ret == -ENOTSUP)
ret = mlx5_link_update_unlocked_gset(dev, &dev_link);
if (ret == 0)
break;
/* Handle wait to complete situation. */
if (wait_to_complete && ret == -EAGAIN) {
if (abs((int)difftime(time(NULL), start_time)) <
MLX5_LINK_STATUS_TIMEOUT) {
usleep(0);
continue;
} else {
rte_errno = EBUSY;
return -rte_errno;
}
} else if (ret < 0) {
return ret;
}
} while (wait_to_complete);
ret = !!memcmp(&dev->data->dev_link, &dev_link,
sizeof(struct rte_eth_link));
dev->data->dev_link = dev_link;
return ret;
}
/**
* 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 mlx5_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;
DRV_LOG(DEBUG, "port %u adapter MTU set to %u",
dev->data->port_id, 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) {
DRV_LOG(WARNING,
"port %u ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM) failed:"
" %s",
dev->data->port_id, 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) {
DRV_LOG(WARNING,
"port %u ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
" failed: %s",
dev->data->port_id, 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;
}
/**
* Handle asynchronous removal event for entire multiport device.
*
* @param sh
* Infiniband device shared context.
*/
static void
mlx5_dev_interrupt_device_fatal(struct mlx5_ibv_shared *sh)
{
uint32_t i;
for (i = 0; i < sh->max_port; ++i) {
struct rte_eth_dev *dev;
if (sh->port[i].ih_port_id >= RTE_MAX_ETHPORTS) {
/*
* Or not existing port either no
* handler installed for this port.
*/
continue;
}
dev = &rte_eth_devices[sh->port[i].ih_port_id];
assert(dev);
if (dev->data->dev_conf.intr_conf.rmv)
_rte_eth_dev_callback_process
(dev, RTE_ETH_EVENT_INTR_RMV, NULL);
}
}
/**
* Handle shared asynchronous events the NIC (removal event
* and link status change). Supports multiport IB device.
*
* @param cb_arg
* Callback argument.
*/
void
mlx5_dev_interrupt_handler(void *cb_arg)
{
struct mlx5_ibv_shared *sh = cb_arg;
struct ibv_async_event event;
/* Read all message from the IB device and acknowledge them. */
for (;;) {
struct rte_eth_dev *dev;
uint32_t tmp;
if (mlx5_glue->get_async_event(sh->ctx, &event))
break;
/* Retrieve and check IB port index. */
tmp = (uint32_t)event.element.port_num;
if (!tmp && event.event_type == IBV_EVENT_DEVICE_FATAL) {
/*
* The DEVICE_FATAL event is called once for
* entire device without port specifying.
* We should notify all existing ports.
*/
mlx5_glue->ack_async_event(&event);
mlx5_dev_interrupt_device_fatal(sh);
continue;
}
assert(tmp && (tmp <= sh->max_port));
if (!tmp) {
/* Unsupported devive level event. */
mlx5_glue->ack_async_event(&event);
DRV_LOG(DEBUG,
"unsupported common event (type %d)",
event.event_type);
continue;
}
if (tmp > sh->max_port) {
/* Invalid IB port index. */
mlx5_glue->ack_async_event(&event);
DRV_LOG(DEBUG,
"cannot handle an event (type %d)"
"due to invalid IB port index (%u)",
event.event_type, tmp);
continue;
}
if (sh->port[tmp - 1].ih_port_id >= RTE_MAX_ETHPORTS) {
/* No handler installed. */
mlx5_glue->ack_async_event(&event);
DRV_LOG(DEBUG,
"cannot handle an event (type %d)"
"due to no handler installed for port %u",
event.event_type, tmp);
continue;
}
/* Retrieve ethernet device descriptor. */
tmp = sh->port[tmp - 1].ih_port_id;
dev = &rte_eth_devices[tmp];
assert(dev);
if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
event.event_type == IBV_EVENT_PORT_ERR) &&
dev->data->dev_conf.intr_conf.lsc) {
mlx5_glue->ack_async_event(&event);
if (mlx5_link_update(dev, 0) == -EAGAIN) {
usleep(0);
continue;
}
_rte_eth_dev_callback_process
(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
continue;
}
DRV_LOG(DEBUG,
"port %u cannot handle an unknown event (type %d)",
dev->data->port_id, event.event_type);
mlx5_glue->ack_async_event(&event);
}
}
/*
* Unregister callback handler safely. The handler may be active
* while we are trying to unregister it, in this case code -EAGAIN
* is returned by rte_intr_callback_unregister(). This routine checks
* the return code and tries to unregister handler again.
*
* @param handle
* interrupt handle
* @param cb_fn
* pointer to callback routine
* @cb_arg
* opaque callback parameter
*/
void
mlx5_intr_callback_unregister(const struct rte_intr_handle *handle,
rte_intr_callback_fn cb_fn, void *cb_arg)
{
/*
* Try to reduce timeout management overhead by not calling
* the timer related routines on the first iteration. If the
* unregistering succeeds on first call there will be no
* timer calls at all.
*/
uint64_t twait = 0;
uint64_t start = 0;
do {
int ret;
ret = rte_intr_callback_unregister(handle, cb_fn, cb_arg);
if (ret >= 0)
return;
if (ret != -EAGAIN) {
DRV_LOG(INFO, "failed to unregister interrupt"
" handler (error: %d)", ret);
assert(false);
return;
}
if (twait) {
struct timespec onems;
/* Wait one millisecond and try again. */
onems.tv_sec = 0;
onems.tv_nsec = NS_PER_S / MS_PER_S;
nanosleep(&onems, 0);
/* Check whether one second elapsed. */
if ((rte_get_timer_cycles() - start) <= twait)
continue;
} else {
/*
* We get the amount of timer ticks for one second.
* If this amount elapsed it means we spent one
* second in waiting. This branch is executed once
* on first iteration.
*/
twait = rte_get_timer_hz();
assert(twait);
}
/*
* Timeout elapsed, show message (once a second) and retry.
* We have no other acceptable option here, if we ignore
* the unregistering return code the handler will not
* be unregistered, fd will be closed and we may get the
* crush. Hanging and messaging in the loop seems not to be
* the worst choice.
*/
DRV_LOG(INFO, "Retrying to unregister interrupt handler");
start = rte_get_timer_cycles();
} while (true);
}
/**
* Handle DEVX interrupts from the NIC.
* This function is probably called from the DPDK host thread.
*
* @param cb_arg
* Callback argument.
*/
void
mlx5_dev_interrupt_handler_devx(void *cb_arg)
{
#ifndef HAVE_IBV_DEVX_ASYNC
(void)cb_arg;
return;
#else
struct mlx5_ibv_shared *sh = cb_arg;
union {
struct mlx5dv_devx_async_cmd_hdr cmd_resp;
uint8_t buf[MLX5_ST_SZ_BYTES(query_flow_counter_out) +
MLX5_ST_SZ_BYTES(traffic_counter) +
sizeof(struct mlx5dv_devx_async_cmd_hdr)];
} out;
uint8_t *buf = out.buf + sizeof(out.cmd_resp);
while (!mlx5_glue->devx_get_async_cmd_comp(sh->devx_comp,
&out.cmd_resp,
sizeof(out.buf)))
mlx5_flow_async_pool_query_handle
(sh, (uint64_t)out.cmd_resp.wr_id,
mlx5_devx_get_out_command_status(buf));
#endif /* HAVE_IBV_DEVX_ASYNC */
}
/**
* Uninstall shared asynchronous device events handler.
* This function is implemented to support event sharing
* between multiple ports of single IB device.
*
* @param dev
* Pointer to Ethernet device.
*/
static void
mlx5_dev_shared_handler_uninstall(struct rte_eth_dev *dev)
{
struct mlx5_priv *priv = dev->data->dev_private;
struct mlx5_ibv_shared *sh = priv->sh;
if (rte_eal_process_type() != RTE_PROC_PRIMARY)
return;
pthread_mutex_lock(&sh->intr_mutex);
assert(priv->ibv_port);
assert(priv->ibv_port <= sh->max_port);
assert(dev->data->port_id < RTE_MAX_ETHPORTS);
if (sh->port[priv->ibv_port - 1].ih_port_id >= RTE_MAX_ETHPORTS)
goto exit;
assert(sh->port[priv->ibv_port - 1].ih_port_id ==
(uint32_t)dev->data->port_id);
assert(sh->intr_cnt);
sh->port[priv->ibv_port - 1].ih_port_id = RTE_MAX_ETHPORTS;
if (!sh->intr_cnt || --sh->intr_cnt)
goto exit;
mlx5_intr_callback_unregister(&sh->intr_handle,
mlx5_dev_interrupt_handler, sh);
sh->intr_handle.fd = 0;
sh->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
if (sh->intr_handle_devx.fd) {
rte_intr_callback_unregister(&sh->intr_handle_devx,
mlx5_dev_interrupt_handler_devx,
sh);
sh->intr_handle_devx.fd = 0;
sh->intr_handle_devx.type = RTE_INTR_HANDLE_UNKNOWN;
}
if (sh->devx_comp) {
mlx5_glue->devx_destroy_cmd_comp(sh->devx_comp);
sh->devx_comp = NULL;
}
exit:
pthread_mutex_unlock(&sh->intr_mutex);
}
/**
* Install shared asynchronous device events handler.
* This function is implemented to support event sharing
* between multiple ports of single IB device.
*
* @param dev
* Pointer to Ethernet device.
*/
static void
mlx5_dev_shared_handler_install(struct rte_eth_dev *dev)
{
struct mlx5_priv *priv = dev->data->dev_private;
struct mlx5_ibv_shared *sh = priv->sh;
int ret;
int flags;
if (rte_eal_process_type() != RTE_PROC_PRIMARY)
return;
pthread_mutex_lock(&sh->intr_mutex);
assert(priv->ibv_port);
assert(priv->ibv_port <= sh->max_port);
assert(dev->data->port_id < RTE_MAX_ETHPORTS);
if (sh->port[priv->ibv_port - 1].ih_port_id < RTE_MAX_ETHPORTS) {
/* The handler is already installed for this port. */
assert(sh->intr_cnt);
goto exit;
}
sh->port[priv->ibv_port - 1].ih_port_id = (uint32_t)dev->data->port_id;
if (sh->intr_cnt) {
sh->intr_cnt++;
goto exit;
}
/* No shared handler installed. */
assert(sh->ctx->async_fd > 0);
flags = fcntl(sh->ctx->async_fd, F_GETFL);
ret = fcntl(sh->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
if (ret) {
DRV_LOG(INFO, "failed to change file descriptor"
" async event queue");
goto error;
}
sh->intr_handle.fd = sh->ctx->async_fd;
sh->intr_handle.type = RTE_INTR_HANDLE_EXT;
rte_intr_callback_register(&sh->intr_handle,
mlx5_dev_interrupt_handler, sh);
if (priv->config.devx) {
#ifndef HAVE_IBV_DEVX_ASYNC
goto error_unregister;
#else
sh->devx_comp = mlx5_glue->devx_create_cmd_comp(sh->ctx);
if (sh->devx_comp) {
flags = fcntl(sh->devx_comp->fd, F_GETFL);
ret = fcntl(sh->devx_comp->fd, F_SETFL,
flags | O_NONBLOCK);
if (ret) {
DRV_LOG(INFO, "failed to change file descriptor"
" devx async event queue");
goto error_unregister;
}
sh->intr_handle_devx.fd = sh->devx_comp->fd;
sh->intr_handle_devx.type = RTE_INTR_HANDLE_EXT;
rte_intr_callback_register
(&sh->intr_handle_devx,
mlx5_dev_interrupt_handler_devx, sh);
} else {
DRV_LOG(INFO, "failed to create devx async command "
"completion");
goto error_unregister;
}
#endif /* HAVE_IBV_DEVX_ASYNC */
}
sh->intr_cnt++;
goto exit;
error_unregister:
rte_intr_callback_unregister(&sh->intr_handle,
mlx5_dev_interrupt_handler, sh);
error:
/* Indicate there will be no interrupts. */
dev->data->dev_conf.intr_conf.lsc = 0;
dev->data->dev_conf.intr_conf.rmv = 0;
sh->intr_handle.fd = 0;
sh->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
sh->port[priv->ibv_port - 1].ih_port_id = RTE_MAX_ETHPORTS;
exit:
pthread_mutex_unlock(&sh->intr_mutex);
}
/**
* Uninstall interrupt handler.
*
* @param dev
* Pointer to Ethernet device.
*/
void
mlx5_dev_interrupt_handler_uninstall(struct rte_eth_dev *dev)
{
mlx5_dev_shared_handler_uninstall(dev);
}
/**
* Install interrupt handler.
*
* @param dev
* Pointer to Ethernet device.
*/
void
mlx5_dev_interrupt_handler_install(struct rte_eth_dev *dev)
{
mlx5_dev_shared_handler_install(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 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;
DRV_LOG(DEBUG, "port %u selected Rx vectorized function",
dev->data->port_id);
} else if (mlx5_mprq_enabled(dev)) {
rx_pkt_burst = mlx5_rx_burst_mprq;
}
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 mlx5_priv *priv = dev->data->dev_private;
if (mlx5_glue->query_device(priv->sh->ctx, &device_attr) == EIO)
return 1;
return 0;
}
/**
* Get port ID list of mlx5 instances sharing a common device.
*
* @param[in] dev
* Device to look for.
* @param[out] port_list
* Result buffer for collected port IDs.
* @param port_list_n
* Maximum number of entries in result buffer. If 0, @p port_list can be
* NULL.
*
* @return
* Number of matching instances regardless of the @p port_list_n
* parameter, 0 if none were found.
*/
unsigned int
mlx5_dev_to_port_id(const struct rte_device *dev, uint16_t *port_list,
unsigned int port_list_n)
{
uint16_t id;
unsigned int n = 0;
RTE_ETH_FOREACH_DEV_OF(id, dev) {
if (n < port_list_n)
port_list[n] = id;
n++;
}
return n;
}
/**
* Get the E-Switch domain id this port belongs to.
*
* @param[in] port
* Device port id.
* @param[out] es_domain_id
* E-Switch domain id.
* @param[out] es_port_id
* The port id of the port in the E-Switch.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_port_to_eswitch_info(uint16_t port,
uint16_t *es_domain_id, uint16_t *es_port_id)
{
struct rte_eth_dev *dev;
struct mlx5_priv *priv;
if (port >= RTE_MAX_ETHPORTS) {
rte_errno = EINVAL;
return -rte_errno;
}
if (!rte_eth_dev_is_valid_port(port)) {
rte_errno = ENODEV;
return -rte_errno;
}
dev = &rte_eth_devices[port];
priv = dev->data->dev_private;
if (!(priv->representor || priv->master)) {
rte_errno = EINVAL;
return -rte_errno;
}
if (es_domain_id)
*es_domain_id = priv->domain_id;
if (es_port_id)
*es_port_id = priv->vport_id;
return 0;
}
/**
* Get switch information associated with network interface.
*
* @param ifindex
* Network interface index.
* @param[out] info
* Switch information object, populated in case of success.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
{
char ifname[IF_NAMESIZE];
char port_name[IF_NAMESIZE];
FILE *file;
struct mlx5_switch_info data = {
.master = 0,
.representor = 0,
.name_type = MLX5_PHYS_PORT_NAME_TYPE_NOTSET,
.port_name = 0,
.switch_id = 0,
};
DIR *dir;
bool port_switch_id_set = false;
bool device_dir = false;
char c;
int ret;
if (!if_indextoname(ifindex, ifname)) {
rte_errno = errno;
return -rte_errno;
}
MKSTR(phys_port_name, "/sys/class/net/%s/phys_port_name",
ifname);
MKSTR(phys_switch_id, "/sys/class/net/%s/phys_switch_id",
ifname);
MKSTR(pci_device, "/sys/class/net/%s/device",
ifname);
file = fopen(phys_port_name, "rb");
if (file != NULL) {
ret = fscanf(file, "%s", port_name);
fclose(file);
if (ret == 1)
mlx5_translate_port_name(port_name, &data);
}
file = fopen(phys_switch_id, "rb");
if (file == NULL) {
rte_errno = errno;
return -rte_errno;
}
port_switch_id_set =
fscanf(file, "%" SCNx64 "%c", &data.switch_id, &c) == 2 &&
c == '\n';
fclose(file);
dir = opendir(pci_device);
if (dir != NULL) {
closedir(dir);
device_dir = true;
}
if (port_switch_id_set) {
/* We have some E-Switch configuration. */
mlx5_sysfs_check_switch_info(device_dir, &data);
}
*info = data;
assert(!(data.master && data.representor));
if (data.master && data.representor) {
DRV_LOG(ERR, "ifindex %u device is recognized as master"
" and as representor", ifindex);
rte_errno = ENODEV;
return -rte_errno;
}
return 0;
}
/**
* Analyze gathered port parameters via Netlink to recognize master
* and representor devices for E-Switch configuration.
*
* @param[in] num_vf_set
* flag of presence of number of VFs port attribute.
* @param[inout] switch_info
* Port information, including port name as a number and port name
* type if recognized
*
* @return
* master and representor flags are set in switch_info according to
* recognized parameters (if any).
*/
void
mlx5_nl_check_switch_info(bool num_vf_set,
struct mlx5_switch_info *switch_info)
{
switch (switch_info->name_type) {
case MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN:
/*
* Name is not recognized, assume the master,
* check the number of VFs key presence.
*/
switch_info->master = num_vf_set;
break;
case MLX5_PHYS_PORT_NAME_TYPE_NOTSET:
/*
* Name is not set, this assumes the legacy naming
* schema for master, just check if there is a
* number of VFs key.
*/
switch_info->master = num_vf_set;
break;
case MLX5_PHYS_PORT_NAME_TYPE_UPLINK:
/* New uplink naming schema recognized. */
switch_info->master = 1;
break;
case MLX5_PHYS_PORT_NAME_TYPE_LEGACY:
/* Legacy representors naming schema. */
switch_info->representor = !num_vf_set;
break;
case MLX5_PHYS_PORT_NAME_TYPE_PFVF:
/* New representors naming schema. */
switch_info->representor = 1;
break;
}
}
/**
* Analyze gathered port parameters via sysfs to recognize master
* and representor devices for E-Switch configuration.
*
* @param[in] device_dir
* flag of presence of "device" directory under port device key.
* @param[inout] switch_info
* Port information, including port name as a number and port name
* type if recognized
*
* @return
* master and representor flags are set in switch_info according to
* recognized parameters (if any).
*/
void
mlx5_sysfs_check_switch_info(bool device_dir,
struct mlx5_switch_info *switch_info)
{
switch (switch_info->name_type) {
case MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN:
/*
* Name is not recognized, assume the master,
* check the device directory presence.
*/
switch_info->master = device_dir;
break;
case MLX5_PHYS_PORT_NAME_TYPE_NOTSET:
/*
* Name is not set, this assumes the legacy naming
* schema for master, just check if there is
* a device directory.
*/
switch_info->master = device_dir;
break;
case MLX5_PHYS_PORT_NAME_TYPE_UPLINK:
/* New uplink naming schema recognized. */
switch_info->master = 1;
break;
case MLX5_PHYS_PORT_NAME_TYPE_LEGACY:
/* Legacy representors naming schema. */
switch_info->representor = !device_dir;
break;
case MLX5_PHYS_PORT_NAME_TYPE_PFVF:
/* New representors naming schema. */
switch_info->representor = 1;
break;
}
}
/**
* Extract port name, as a number, from sysfs or netlink information.
*
* @param[in] port_name_in
* String representing the port name.
* @param[out] port_info_out
* Port information, including port name as a number and port name
* type if recognized
*
* @return
* port_name field set according to recognized name format.
*/
void
mlx5_translate_port_name(const char *port_name_in,
struct mlx5_switch_info *port_info_out)
{
char pf_c1, pf_c2, vf_c1, vf_c2;
char *end;
int sc_items;
/*
* Check for port-name as a string of the form pf0vf0
* (support kernel ver >= 5.0 or OFED ver >= 4.6).
*/
sc_items = sscanf(port_name_in, "%c%c%d%c%c%d",
&pf_c1, &pf_c2, &port_info_out->pf_num,
&vf_c1, &vf_c2, &port_info_out->port_name);
if (sc_items == 6 &&
pf_c1 == 'p' && pf_c2 == 'f' &&
vf_c1 == 'v' && vf_c2 == 'f') {
port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_PFVF;
return;
}
/*
* Check for port-name as a string of the form p0
* (support kernel ver >= 5.0, or OFED ver >= 4.6).
*/
sc_items = sscanf(port_name_in, "%c%d",
&pf_c1, &port_info_out->port_name);
if (sc_items == 2 && pf_c1 == 'p') {
port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UPLINK;
return;
}
/* Check for port-name as a number (support kernel ver < 5.0 */
errno = 0;
port_info_out->port_name = strtol(port_name_in, &end, 0);
if (!errno &&
(size_t)(end - port_name_in) == strlen(port_name_in)) {
port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_LEGACY;
return;
}
port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN;
return;
}
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