almalinux/kernel
14
0
Fork 0
Code Issues Pull Requests Releases Activity
c071e463bc
kernel/drivers/net/ethernet/mellanox/mlx4/en_main.c

436 lines
12 KiB
C
Raw Blame History

/*
* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/cpumask.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/mlx4/driver.h>
#include <linux/mlx4/device.h>
#include <linux/mlx4/cmd.h>
#include "mlx4_en.h"
MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin");
MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION);
static const char mlx4_en_version[] =
DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
DRV_VERSION "\n";
#define MLX4_EN_PARM_INT(X, def_val, desc) \
static unsigned int X = def_val;\
module_param(X , uint, 0444); \
MODULE_PARM_DESC(X, desc);
/*
* Device scope module parameters
*/
/* Enable RSS UDP traffic */
MLX4_EN_PARM_INT(udp_rss, 1,
"Enable RSS for incoming UDP traffic or disabled (0)");
/* Priority pausing */
MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
" Per priority bit mask");
MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
" Per priority bit mask");
MLX4_EN_PARM_INT(inline_thold, MAX_INLINE,
"Threshold for using inline data (range: 17-104, default: 104)");
#define MAX_PFC_TX 0xff
#define MAX_PFC_RX 0xff
void en_print(const char *level, const struct mlx4_en_priv *priv,
const char *format, ...)
{
va_list args;
struct va_format vaf;
va_start(args, format);
vaf.fmt = format;
vaf.va = &args;
if (priv->registered)
printk("%s%s: %s: %pV",
level, DRV_NAME, priv->dev->name, &vaf);
else
printk("%s%s: %s: Port %d: %pV",
level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
priv->port, &vaf);
va_end(args);
}
void mlx4_en_update_loopback_state(struct net_device *dev,
netdev_features_t features)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
if (features & NETIF_F_LOOPBACK)
priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
else
priv->ctrl_flags &= cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
/* Drop the packet if SRIOV is not enabled
* and not performing the selftest or flb disabled
*/
if (mlx4_is_mfunc(priv->mdev->dev) &&
!(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)
priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;
/* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
* is requested
*/
if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
mutex_lock(&priv->mdev->state_lock);
if ((priv->mdev->dev->caps.flags2 &
MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB) &&
priv->rss_map.indir_qp && priv->rss_map.indir_qp->qpn) {
int i;
int err = 0;
int loopback = !!(features & NETIF_F_LOOPBACK);
for (i = 0; i < priv->rx_ring_num; i++) {
int ret;
ret = mlx4_en_change_mcast_lb(priv,
&priv->rss_map.qps[i],
loopback);
if (!err)
err = ret;
}
if (err)
mlx4_warn(priv->mdev, "failed to change mcast loopback\n");
}
mutex_unlock(&priv->mdev->state_lock);
}
static void mlx4_en_get_profile(struct mlx4_en_dev *mdev)
{
struct mlx4_en_profile *params = &mdev->profile;
int i;
params->udp_rss = udp_rss;
params->max_num_tx_rings_p_up = mlx4_low_memory_profile() ?
MLX4_EN_MIN_TX_RING_P_UP :
min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP);
if (params->udp_rss && !(mdev->dev->caps.flags
& MLX4_DEV_CAP_FLAG_UDP_RSS)) {
mlx4_warn(mdev, "UDP RSS is not supported on this device\n");
params->udp_rss = 0;
}
for (i = 1; i <= MLX4_MAX_PORTS; i++) {
params->prof[i].rx_pause = !(pfcrx || pfctx);
params->prof[i].rx_ppp = pfcrx;
params->prof[i].tx_pause = !(pfcrx || pfctx);
params->prof[i].tx_ppp = pfctx;
if (mlx4_low_memory_profile()) {
params->prof[i].tx_ring_size = MLX4_EN_MIN_TX_SIZE;
params->prof[i].rx_ring_size = MLX4_EN_MIN_RX_SIZE;
} else {
params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
}
params->prof[i].num_up = MLX4_EN_NUM_UP_LOW;
params->prof[i].num_tx_rings_p_up = params->max_num_tx_rings_p_up;
params->prof[i].tx_ring_num[TX] = params->max_num_tx_rings_p_up *
params->prof[i].num_up;
params->prof[i].rss_rings = 0;
params->prof[i].inline_thold = inline_thold;
}
}
static int mlx4_en_event(struct notifier_block *this, unsigned long event,
void *param)
{
struct mlx4_en_dev *mdev =
container_of(this, struct mlx4_en_dev, mlx_nb);
struct mlx4_dev *dev = mdev->dev;
struct mlx4_en_priv *priv;
int port;
switch (event) {
case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
case MLX4_DEV_EVENT_SLAVE_INIT:
case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
break;
default:
port = *(int *)param;
break;
}
switch (event) {
case MLX4_DEV_EVENT_PORT_UP:
case MLX4_DEV_EVENT_PORT_DOWN:
if (!mdev->pndev[port])
return NOTIFY_DONE;
priv = netdev_priv(mdev->pndev[port]);
/* To prevent races, we poll the link state in a separate
task rather than changing it here */
priv->link_state = event;
queue_work(mdev->workqueue, &priv->linkstate_task);
break;
case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
mlx4_err(mdev, "Internal error detected, restarting device\n");
break;
case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
case MLX4_DEV_EVENT_SLAVE_INIT:
case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
break;
default:
if (port < 1 || port > dev->caps.num_ports ||
!mdev->pndev[port])
return NOTIFY_DONE;
mlx4_warn(mdev, "Unhandled event %d for port %d\n", (int)event,
port);
}
return NOTIFY_DONE;
}
static void mlx4_en_remove(struct auxiliary_device *adev)
{
struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev);
struct mlx4_dev *dev = madev->mdev;
struct mlx4_en_dev *mdev = auxiliary_get_drvdata(adev);
int i;
mlx4_unregister_event_notifier(dev, &mdev->mlx_nb);
mutex_lock(&mdev->state_lock);
mdev->device_up = false;
mutex_unlock(&mdev->state_lock);
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
if (mdev->pndev[i])
mlx4_en_destroy_netdev(mdev->pndev[i]);
destroy_workqueue(mdev->workqueue);
(void) mlx4_mr_free(dev, &mdev->mr);
iounmap(mdev->uar_map);
mlx4_uar_free(dev, &mdev->priv_uar);
mlx4_pd_free(dev, mdev->priv_pdn);
if (mdev->netdev_nb.notifier_call)
unregister_netdevice_notifier(&mdev->netdev_nb);
kfree(mdev);
}
static int mlx4_en_probe(struct auxiliary_device *adev,
const struct auxiliary_device_id *id)
{
struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev);
struct mlx4_dev *dev = madev->mdev;
struct mlx4_en_dev *mdev;
int err, i;
printk_once(KERN_INFO "%s", mlx4_en_version);
mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
if (!mdev) {
err = -ENOMEM;
goto err_free_res;
}
err = mlx4_pd_alloc(dev, &mdev->priv_pdn);
if (err)
goto err_free_dev;
err = mlx4_uar_alloc(dev, &mdev->priv_uar);
if (err)
goto err_pd;
mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
PAGE_SIZE);
if (!mdev->uar_map) {
err = -ENOMEM;
goto err_uar;
}
spin_lock_init(&mdev->uar_lock);
mdev->dev = dev;
mdev->dma_device = &dev->persist->pdev->dev;
mdev->pdev = dev->persist->pdev;
mdev->device_up = false;
mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
if (!mdev->LSO_support)
mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n");
err = mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 0, 0,
&mdev->mr);
if (err) {
mlx4_err(mdev, "Failed allocating memory region\n");
goto err_map;
}
err = mlx4_mr_enable(mdev->dev, &mdev->mr);
if (err) {
mlx4_err(mdev, "Failed enabling memory region\n");
goto err_mr;
}
/* Build device profile according to supplied module parameters */
mlx4_en_get_profile(mdev);
/* Configure which ports to start according to module parameters */
mdev->port_cnt = 0;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
mdev->port_cnt++;
/* Set default number of RX rings*/
mlx4_en_set_num_rx_rings(mdev);
/* Create our own workqueue for reset/multicast tasks
* Note: we cannot use the shared workqueue because of deadlocks caused
* by the rtnl lock */
mdev->workqueue = create_singlethread_workqueue("mlx4_en");
if (!mdev->workqueue) {
err = -ENOMEM;
goto err_mr;
}
/* At this stage all non-port specific tasks are complete:
* mark the card state as up */
mutex_init(&mdev->state_lock);
mdev->device_up = true;
/* register mlx4 core notifier */
mdev->mlx_nb.notifier_call = mlx4_en_event;
err = mlx4_register_event_notifier(dev, &mdev->mlx_nb);
WARN(err, "failed to register mlx4 event notifier (%d)", err);
/* Setup ports */
/* Create a netdev for each port */
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
mlx4_info(mdev, "Activating port:%d\n", i);
if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
mdev->pndev[i] = NULL;
}
/* register netdev notifier */
mdev->netdev_nb.notifier_call = mlx4_en_netdev_event;
if (register_netdevice_notifier(&mdev->netdev_nb)) {
mdev->netdev_nb.notifier_call = NULL;
mlx4_err(mdev, "Failed to create netdev notifier\n");
}
auxiliary_set_drvdata(adev, mdev);
return 0;
err_mr:
(void) mlx4_mr_free(dev, &mdev->mr);
err_map:
if (mdev->uar_map)
iounmap(mdev->uar_map);
err_uar:
mlx4_uar_free(dev, &mdev->priv_uar);
err_pd:
mlx4_pd_free(dev, mdev->priv_pdn);
err_free_dev:
kfree(mdev);
err_free_res:
return err;
}
static const struct auxiliary_device_id mlx4_en_id_table[] = {
{ .name = MLX4_ADEV_NAME ".eth" },
{},
};
MODULE_DEVICE_TABLE(auxiliary, mlx4_en_id_table);
static struct mlx4_adrv mlx4_en_adrv = {
.adrv = {
.name = "eth",
.probe = mlx4_en_probe,
.remove = mlx4_en_remove,
.id_table = mlx4_en_id_table,
},
.protocol = MLX4_PROT_ETH,
};
static void mlx4_en_verify_params(void)
{
if (pfctx > MAX_PFC_TX) {
pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
pfctx, MAX_PFC_TX);
pfctx = 0;
}
if (pfcrx > MAX_PFC_RX) {
pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
pfcrx, MAX_PFC_RX);
pfcrx = 0;
}
if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
inline_thold = MAX_INLINE;
}
}
static int __init mlx4_en_init(void)
{
mlx4_en_verify_params();
mlx4_en_init_ptys2ethtool_map();
return mlx4_register_auxiliary_driver(&mlx4_en_adrv);
}
static void __exit mlx4_en_cleanup(void)
{
mlx4_unregister_auxiliary_driver(&mlx4_en_adrv);
}
module_init(mlx4_en_init);
module_exit(mlx4_en_cleanup);
Reference in New Issue View Git Blame Copy Permalink