blob: 3a81c2f1971b00bb6b43f57b9fe7f994f935137b [file] [log] [blame]
/*
* Copyright (c) 2013-2015, 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/mlx5/driver.h>
#include <linux/mlx5/eswitch.h>
#include <linux/mlx5/mlx5_ifc_vdpa.h>
#include "mlx5_core.h"
/* intf dev list mutex */
static DEFINE_MUTEX(mlx5_intf_mutex);
static DEFINE_IDA(mlx5_adev_ida);
static bool is_eth_rep_supported(struct mlx5_core_dev *dev)
{
if (!IS_ENABLED(CONFIG_MLX5_ESWITCH))
return false;
if (!MLX5_ESWITCH_MANAGER(dev))
return false;
if (mlx5_eswitch_mode(dev->priv.eswitch) != MLX5_ESWITCH_OFFLOADS)
return false;
return true;
}
static bool is_eth_supported(struct mlx5_core_dev *dev)
{
if (!IS_ENABLED(CONFIG_MLX5_CORE_EN))
return false;
if (is_eth_rep_supported(dev))
return false;
if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
return false;
if (!MLX5_CAP_GEN(dev, eth_net_offloads)) {
mlx5_core_warn(dev, "Missing eth_net_offloads capability\n");
return false;
}
if (!MLX5_CAP_GEN(dev, nic_flow_table)) {
mlx5_core_warn(dev, "Missing nic_flow_table capability\n");
return false;
}
if (!MLX5_CAP_ETH(dev, csum_cap)) {
mlx5_core_warn(dev, "Missing csum_cap capability\n");
return false;
}
if (!MLX5_CAP_ETH(dev, max_lso_cap)) {
mlx5_core_warn(dev, "Missing max_lso_cap capability\n");
return false;
}
if (!MLX5_CAP_ETH(dev, vlan_cap)) {
mlx5_core_warn(dev, "Missing vlan_cap capability\n");
return false;
}
if (!MLX5_CAP_ETH(dev, rss_ind_tbl_cap)) {
mlx5_core_warn(dev, "Missing rss_ind_tbl_cap capability\n");
return false;
}
if (MLX5_CAP_FLOWTABLE(dev,
flow_table_properties_nic_receive.max_ft_level) < 3) {
mlx5_core_warn(dev, "max_ft_level < 3\n");
return false;
}
if (!MLX5_CAP_ETH(dev, self_lb_en_modifiable))
mlx5_core_warn(dev, "Self loop back prevention is not supported\n");
if (!MLX5_CAP_GEN(dev, cq_moderation))
mlx5_core_warn(dev, "CQ moderation is not supported\n");
return true;
}
static bool is_vnet_supported(struct mlx5_core_dev *dev)
{
if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET))
return false;
if (mlx5_core_is_pf(dev))
return false;
if (!(MLX5_CAP_GEN_64(dev, general_obj_types) &
MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q))
return false;
if (!(MLX5_CAP_DEV_VDPA_EMULATION(dev, event_mode) &
MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE))
return false;
if (!MLX5_CAP_DEV_VDPA_EMULATION(dev, eth_frame_offload_type))
return false;
return true;
}
static bool is_ib_rep_supported(struct mlx5_core_dev *dev)
{
if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
return false;
if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
return false;
if (!is_eth_rep_supported(dev))
return false;
if (!MLX5_ESWITCH_MANAGER(dev))
return false;
if (mlx5_eswitch_mode(dev->priv.eswitch) != MLX5_ESWITCH_OFFLOADS)
return false;
if (mlx5_core_mp_enabled(dev))
return false;
return true;
}
static bool is_mp_supported(struct mlx5_core_dev *dev)
{
if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
return false;
if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
return false;
if (is_ib_rep_supported(dev))
return false;
if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
return false;
if (!mlx5_core_is_mp_slave(dev))
return false;
return true;
}
static bool is_ib_supported(struct mlx5_core_dev *dev)
{
if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
return false;
if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
return false;
if (is_ib_rep_supported(dev))
return false;
if (is_mp_supported(dev))
return false;
return true;
}
enum {
MLX5_INTERFACE_PROTOCOL_ETH_REP,
MLX5_INTERFACE_PROTOCOL_ETH,
MLX5_INTERFACE_PROTOCOL_IB_REP,
MLX5_INTERFACE_PROTOCOL_MPIB,
MLX5_INTERFACE_PROTOCOL_IB,
MLX5_INTERFACE_PROTOCOL_VNET,
};
static const struct mlx5_adev_device {
const char *suffix;
bool (*is_supported)(struct mlx5_core_dev *dev);
} mlx5_adev_devices[] = {
[MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet",
.is_supported = &is_vnet_supported },
[MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma",
.is_supported = &is_ib_supported },
[MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth",
.is_supported = &is_eth_supported },
[MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep",
.is_supported = &is_eth_rep_supported },
[MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep",
.is_supported = &is_ib_rep_supported },
[MLX5_INTERFACE_PROTOCOL_MPIB] = { .suffix = "multiport",
.is_supported = &is_mp_supported },
};
int mlx5_adev_idx_alloc(void)
{
return ida_alloc(&mlx5_adev_ida, GFP_KERNEL);
}
void mlx5_adev_idx_free(int idx)
{
ida_free(&mlx5_adev_ida, idx);
}
int mlx5_adev_init(struct mlx5_core_dev *dev)
{
struct mlx5_priv *priv = &dev->priv;
priv->adev = kcalloc(ARRAY_SIZE(mlx5_adev_devices),
sizeof(struct mlx5_adev *), GFP_KERNEL);
if (!priv->adev)
return -ENOMEM;
return 0;
}
void mlx5_adev_cleanup(struct mlx5_core_dev *dev)
{
struct mlx5_priv *priv = &dev->priv;
kfree(priv->adev);
}
static void adev_release(struct device *dev)
{
struct mlx5_adev *mlx5_adev =
container_of(dev, struct mlx5_adev, adev.dev);
struct mlx5_priv *priv = &mlx5_adev->mdev->priv;
int idx = mlx5_adev->idx;
kfree(mlx5_adev);
priv->adev[idx] = NULL;
}
static struct mlx5_adev *add_adev(struct mlx5_core_dev *dev, int idx)
{
const char *suffix = mlx5_adev_devices[idx].suffix;
struct auxiliary_device *adev;
struct mlx5_adev *madev;
int ret;
madev = kzalloc(sizeof(*madev), GFP_KERNEL);
if (!madev)
return ERR_PTR(-ENOMEM);
adev = &madev->adev;
adev->id = dev->priv.adev_idx;
adev->name = suffix;
adev->dev.parent = dev->device;
adev->dev.release = adev_release;
madev->mdev = dev;
madev->idx = idx;
ret = auxiliary_device_init(adev);
if (ret) {
kfree(madev);
return ERR_PTR(ret);
}
ret = auxiliary_device_add(adev);
if (ret) {
auxiliary_device_uninit(adev);
return ERR_PTR(ret);
}
return madev;
}
static void del_adev(struct auxiliary_device *adev)
{
auxiliary_device_delete(adev);
auxiliary_device_uninit(adev);
}
int mlx5_attach_device(struct mlx5_core_dev *dev)
{
struct mlx5_priv *priv = &dev->priv;
struct auxiliary_device *adev;
struct auxiliary_driver *adrv;
int ret = 0, i;
mutex_lock(&mlx5_intf_mutex);
for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
if (!priv->adev[i]) {
bool is_supported = false;
if (mlx5_adev_devices[i].is_supported)
is_supported = mlx5_adev_devices[i].is_supported(dev);
if (!is_supported)
continue;
priv->adev[i] = add_adev(dev, i);
if (IS_ERR(priv->adev[i])) {
ret = PTR_ERR(priv->adev[i]);
priv->adev[i] = NULL;
}
} else {
adev = &priv->adev[i]->adev;
adrv = to_auxiliary_drv(adev->dev.driver);
if (adrv->resume)
ret = adrv->resume(adev);
}
if (ret) {
mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
i, mlx5_adev_devices[i].suffix);
break;
}
}
mutex_unlock(&mlx5_intf_mutex);
return ret;
}
void mlx5_detach_device(struct mlx5_core_dev *dev)
{
struct mlx5_priv *priv = &dev->priv;
struct auxiliary_device *adev;
struct auxiliary_driver *adrv;
pm_message_t pm = {};
int i;
mutex_lock(&mlx5_intf_mutex);
for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
if (!priv->adev[i])
continue;
adev = &priv->adev[i]->adev;
adrv = to_auxiliary_drv(adev->dev.driver);
if (adrv->suspend) {
adrv->suspend(adev, pm);
continue;
}
del_adev(&priv->adev[i]->adev);
priv->adev[i] = NULL;
}
mutex_unlock(&mlx5_intf_mutex);
}
int mlx5_register_device(struct mlx5_core_dev *dev)
{
int ret;
mutex_lock(&mlx5_intf_mutex);
dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
ret = mlx5_rescan_drivers_locked(dev);
mutex_unlock(&mlx5_intf_mutex);
if (ret)
mlx5_unregister_device(dev);
return ret;
}
void mlx5_unregister_device(struct mlx5_core_dev *dev)
{
mutex_lock(&mlx5_intf_mutex);
dev->priv.flags |= MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
mlx5_rescan_drivers_locked(dev);
mutex_unlock(&mlx5_intf_mutex);
}
static int add_drivers(struct mlx5_core_dev *dev)
{
struct mlx5_priv *priv = &dev->priv;
int i, ret = 0;
for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
bool is_supported = false;
if (priv->adev[i])
continue;
if (mlx5_adev_devices[i].is_supported)
is_supported = mlx5_adev_devices[i].is_supported(dev);
if (!is_supported)
continue;
priv->adev[i] = add_adev(dev, i);
if (IS_ERR(priv->adev[i])) {
mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
i, mlx5_adev_devices[i].suffix);
/* We continue to rescan drivers and leave to the caller
* to make decision if to release everything or continue.
*/
ret = PTR_ERR(priv->adev[i]);
priv->adev[i] = NULL;
}
}
return ret;
}
static void delete_drivers(struct mlx5_core_dev *dev)
{
struct mlx5_priv *priv = &dev->priv;
bool delete_all;
int i;
delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
bool is_supported = false;
if (!priv->adev[i])
continue;
if (mlx5_adev_devices[i].is_supported && !delete_all)
is_supported = mlx5_adev_devices[i].is_supported(dev);
if (is_supported)
continue;
del_adev(&priv->adev[i]->adev);
priv->adev[i] = NULL;
}
}
/* This function is used after mlx5_core_dev is reconfigured.
*/
int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev)
{
struct mlx5_priv *priv = &dev->priv;
lockdep_assert_held(&mlx5_intf_mutex);
delete_drivers(dev);
if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV)
return 0;
return add_drivers(dev);
}
static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev)
{
return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
(dev->pdev->bus->number << 8) |
PCI_SLOT(dev->pdev->devfn));
}
static int next_phys_dev(struct device *dev, const void *data)
{
struct mlx5_adev *madev = container_of(dev, struct mlx5_adev, adev.dev);
struct mlx5_core_dev *mdev = madev->mdev;
const struct mlx5_core_dev *curr = data;
if (!mlx5_core_is_pf(mdev))
return 0;
if (mdev == curr)
return 0;
if (mlx5_gen_pci_id(mdev) != mlx5_gen_pci_id(curr))
return 0;
return 1;
}
/* This function is called with two flows:
* 1. During initialization of mlx5_core_dev and we don't need to lock it.
* 2. During LAG configure stage and caller holds &mlx5_intf_mutex.
*/
struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
{
struct auxiliary_device *adev;
struct mlx5_adev *madev;
if (!mlx5_core_is_pf(dev))
return NULL;
adev = auxiliary_find_device(NULL, dev, &next_phys_dev);
if (!adev)
return NULL;
madev = container_of(adev, struct mlx5_adev, adev);
put_device(&adev->dev);
return madev->mdev;
}
void mlx5_dev_list_lock(void)
{
mutex_lock(&mlx5_intf_mutex);
}
void mlx5_dev_list_unlock(void)
{
mutex_unlock(&mlx5_intf_mutex);
}
int mlx5_dev_list_trylock(void)
{
return mutex_trylock(&mlx5_intf_mutex);
}