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/*
* 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/module.h>
#include <linux/delay.h>
#include <linux/netdevice.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 " ("DRV_RELDATE")");
static const char mlx4_en_version[] =
DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
DRV_VERSION " (" DRV_RELDATE ")\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 TCP traffic */
MLX4_EN_PARM_INT(tcp_rss, 1,
"Enable RSS for incomming TCP traffic or disabled (0)");
/* Enable RSS UDP traffic */
MLX4_EN_PARM_INT(udp_rss, 1,
"Enable RSS for incomming UDP traffic or disabled (0)");
/* Number of LRO sessions per Rx ring (rounded up to a power of two) */
MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS,
"Number of LRO sessions per ring or disabled (0)");
/* Allow reassembly of fragmented IP packets */
MLX4_EN_PARM_INT(ip_reasm, 1, "Allow reassembly of fragmented IP packets (!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");
static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
{
struct mlx4_en_profile *params = &mdev->profile;
int i;
params->tcp_rss = tcp_rss;
params->udp_rss = udp_rss;
if (params->udp_rss && !mdev->dev->caps.udp_rss) {
mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
params->udp_rss = 0;
}
params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS);
params->ip_reasm = ip_reasm;
for (i = 1; i <= MLX4_MAX_PORTS; i++) {
params->prof[i].rx_pause = 1;
params->prof[i].rx_ppp = pfcrx;
params->prof[i].tx_pause = 1;
params->prof[i].tx_ppp = pfctx;
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].tx_ring_num = MLX4_EN_NUM_HASH_RINGS + 1 +
(!!pfcrx) * MLX4_EN_NUM_PPP_RINGS;
}
return 0;
}
static void *get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
{
struct mlx4_en_dev *endev = ctx;
return endev->pndev[port];
}
static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
enum mlx4_dev_event event, int port)
{
struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
struct mlx4_en_priv *priv;
if (!mdev->pndev[port])
return;
priv = netdev_priv(mdev->pndev[port]);
switch (event) {
case MLX4_DEV_EVENT_PORT_UP:
case MLX4_DEV_EVENT_PORT_DOWN:
/* 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;
default:
mlx4_warn(mdev, "Unhandled event: %d\n", event);
}
}
static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
{
struct mlx4_en_dev *mdev = endev_ptr;
int i;
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]);
flush_workqueue(mdev->workqueue);
destroy_workqueue(mdev->workqueue);
mlx4_mr_free(dev, &mdev->mr);
mlx4_uar_free(dev, &mdev->priv_uar);
mlx4_pd_free(dev, mdev->priv_pdn);
sx_destroy(&mdev->state_lock.sx);
mtx_destroy(&mdev->uar_lock.m);
kfree(mdev);
}
static void *mlx4_en_add(struct mlx4_dev *dev)
{
static int mlx4_en_version_printed;
struct mlx4_en_dev *mdev;
int i;
int err;
if (!mlx4_en_version_printed) {
printk(KERN_INFO "%s", mlx4_en_version);
mlx4_en_version_printed++;
}
mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
if (!mdev) {
dev_err(&dev->pdev->dev, "Device struct alloc failed, "
"aborting.\n");
err = -ENOMEM;
goto err_free_res;
}
if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
goto err_free_dev;
if (mlx4_uar_alloc(dev, &mdev->priv_uar))
goto err_pd;
mtx_init(&mdev->uar_lock.m, "mlx4 uar", NULL, MTX_DEF);
mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
if (!mdev->uar_map)
goto err_uar;
mdev->dev = dev;
mdev->dma_device = &(dev->pdev->dev);
mdev->pdev = dev->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");
if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
0, 0, &mdev->mr)) {
mlx4_err(mdev, "Failed allocating memory region\n");
goto err_uar;
}
if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
mlx4_err(mdev, "Failed enabling memory region\n");
goto err_mr;
}
/* Build device profile according to supplied module parameters */
err = mlx4_en_get_profile(mdev);
if (err) {
mlx4_err(mdev, "Bad module parameters, aborting.\n");
goto err_mr;
}
/* Configure wich ports to start according to module parameters */
mdev->port_cnt = 0;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
mdev->port_cnt++;
/* If we did not receive an explicit number of Rx rings, default to
* the number of completion vectors populated by the mlx4_core */
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
mlx4_info(mdev, "Using %d tx rings for port:%d\n",
mdev->profile.prof[i].tx_ring_num, i);
mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
min_t(int, dev->caps.num_comp_vectors, MAX_RX_RINGS));
mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
mdev->profile.prof[i].rx_ring_num, i);
}
/* 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 */
sx_init(&mdev->state_lock.sx, "mlxen state");
mdev->device_up = true;
/* 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;
goto err_free_netdev;
}
}
return mdev;
err_free_netdev:
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
if (mdev->pndev[i])
mlx4_en_destroy_netdev(mdev->pndev[i]);
}
mutex_lock(&mdev->state_lock);
mdev->device_up = false;
mutex_unlock(&mdev->state_lock);
flush_workqueue(mdev->workqueue);
/* Stop event queue before we drop down to release shared SW state */
destroy_workqueue(mdev->workqueue);
err_mr:
mlx4_mr_free(dev, &mdev->mr);
err_uar:
mtx_destroy(&mdev->uar_lock.m);
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 NULL;
}
enum mlx4_query_reply mlx4_en_query(void *endev_ptr, void *int_dev)
{
struct mlx4_en_dev *mdev = endev_ptr;
struct net_device *netdev = int_dev;
int p;
for (p = 1; p <= MLX4_MAX_PORTS; ++p)
if (mdev->pndev[p] == netdev)
return p;
return MLX4_QUERY_NOT_MINE;
}
#if 0
static struct pci_device_id mlx4_en_pci_table[] = {
{ PCI_VDEVICE(MELLANOX, 0x6340) }, /* MT25408 "Hermon" SDR */
{ PCI_VDEVICE(MELLANOX, 0x634a) }, /* MT25408 "Hermon" DDR */
{ PCI_VDEVICE(MELLANOX, 0x6354) }, /* MT25408 "Hermon" QDR */
{ PCI_VDEVICE(MELLANOX, 0x6732) }, /* MT25408 "Hermon" DDR PCIe gen2 */
{ PCI_VDEVICE(MELLANOX, 0x673c) }, /* MT25408 "Hermon" QDR PCIe gen2 */
{ PCI_VDEVICE(MELLANOX, 0x6368) }, /* MT25408 "Hermon" EN 10GigE */
{ PCI_VDEVICE(MELLANOX, 0x6750) }, /* MT25408 "Hermon" EN 10GigE PCIe gen2 */
{ PCI_VDEVICE(MELLANOX, 0x6372) }, /* MT25458 ConnectX EN 10GBASE-T 10GigE */
{ PCI_VDEVICE(MELLANOX, 0x675a) }, /* MT25458 ConnectX EN 10GBASE-T+Gen2 10GigE */
{ PCI_VDEVICE(MELLANOX, 0x6764) }, /* MT26468 ConnectX EN 10GigE PCIe gen2 */
{ PCI_VDEVICE(MELLANOX, 0x6746) }, /* MT26438 ConnectX VPI PCIe 2.0 5GT/s - IB QDR / 10GigE Virt+ */
{ PCI_VDEVICE(MELLANOX, 0x676e) }, /* MT26478 ConnectX EN 40GigE PCIe 2.0 5GT/s */
{ PCI_VDEVICE(MELLANOX, 0x6778) }, /* MT26488 ConnectX VPI PCIe 2.0 5GT/s - IB DDR / 10GigE Virt+ */
{ PCI_VDEVICE(MELLANOX, 0x1000) },
{ PCI_VDEVICE(MELLANOX, 0x1001) },
{ PCI_VDEVICE(MELLANOX, 0x1002) },
{ PCI_VDEVICE(MELLANOX, 0x1003) },
{ PCI_VDEVICE(MELLANOX, 0x1004) },
{ PCI_VDEVICE(MELLANOX, 0x1005) },
{ PCI_VDEVICE(MELLANOX, 0x1006) },
{ PCI_VDEVICE(MELLANOX, 0x1007) },
{ PCI_VDEVICE(MELLANOX, 0x1008) },
{ PCI_VDEVICE(MELLANOX, 0x1009) },
{ PCI_VDEVICE(MELLANOX, 0x100a) },
{ PCI_VDEVICE(MELLANOX, 0x100b) },
{ PCI_VDEVICE(MELLANOX, 0x100c) },
{ PCI_VDEVICE(MELLANOX, 0x100d) },
{ PCI_VDEVICE(MELLANOX, 0x100e) },
{ PCI_VDEVICE(MELLANOX, 0x100f) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, mlx4_en_pci_table);
#endif
static struct mlx4_interface mlx4_en_interface = {
.add = mlx4_en_add,
.remove = mlx4_en_remove,
.event = mlx4_en_event,
.query = mlx4_en_query,
.get_prot_dev = get_netdev,
.protocol = MLX4_PROT_EN,
};
static int __init mlx4_en_init(void)
{
return mlx4_register_interface(&mlx4_en_interface);
}
static void __exit mlx4_en_cleanup(void)
{
mlx4_unregister_interface(&mlx4_en_interface);
}
module_init(mlx4_en_init);
module_exit(mlx4_en_cleanup);
#undef MODULE_VERSION
#include <sys/module.h>
static int
mlxen_evhand(module_t mod, int event, void *arg)
{
return (0);
}
static moduledata_t mlxen_mod = {
.name = "mlxen",
.evhand = mlxen_evhand,
};
DECLARE_MODULE(mlxen, mlxen_mod, SI_SUB_SMP, SI_ORDER_ANY);
MODULE_DEPEND(mlxen, mlx4, 1, 1, 1);