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Message-Id: <20210118201231.363126-8-saeed@kernel.org>
Date: Mon, 18 Jan 2021 12:12:24 -0800
From: Saeed Mahameed <saeed@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Jason Gunthorpe <jgg@...dia.com>
Cc: netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
Parav Pandit <parav@...dia.com>, Vu Pham <vuhuong@...dia.com>,
Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next V7 07/14] net/mlx5: SF, Add auxiliary device driver
From: Parav Pandit <parav@...dia.com>
Add auxiliary device driver for mlx5 subfunction auxiliary device.
A mlx5 subfunction is similar to PCI PF and VF. For a subfunction
an auxiliary device is created.
As a result, when mlx5 SF auxiliary device binds to the driver,
its netdev and rdma device are created, they appear as
$ ls -l /sys/bus/auxiliary/devices/
mlx5_core.sf.4 -> ../../../devices/pci0000:00/0000:00:03.0/0000:06:00.0/mlx5_core.sf.4
$ ls -l /sys/class/net/eth1/device
/sys/class/net/eth1/device -> ../../../mlx5_core.sf.4
$ cat /sys/bus/auxiliary/devices/mlx5_core.sf.4/sfnum
88
$ devlink dev show
pci/0000:06:00.0
auxiliary/mlx5_core.sf.4
$ devlink port show auxiliary/mlx5_core.sf.4/1
auxiliary/mlx5_core.sf.4/1: type eth netdev p0sf88 flavour virtual port 0 splittable false
$ rdma link show mlx5_0/1
link mlx5_0/1 state ACTIVE physical_state LINK_UP netdev p0sf88
$ rdma dev show
8: rocep6s0f1: node_type ca fw 16.29.0550 node_guid 248a:0703:00b3:d113 sys_image_guid 248a:0703:00b3:d112
13: mlx5_0: node_type ca fw 16.29.0550 node_guid 0000:00ff:fe00:8888 sys_image_guid 248a:0703:00b3:d112
In future, devlink device instance name will adapt to have sfnum
annotation using either an alias or as devlink instance name described
in RFC [1].
[1] https://lore.kernel.org/netdev/20200519092258.GF4655@nanopsycho/
Signed-off-by: Parav Pandit <parav@...dia.com>
Reviewed-by: Vu Pham <vuhuong@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
.../net/ethernet/mellanox/mlx5/core/Makefile | 2 +-
.../net/ethernet/mellanox/mlx5/core/devlink.c | 12 +++
drivers/net/ethernet/mellanox/mlx5/core/eq.c | 2 +-
.../net/ethernet/mellanox/mlx5/core/main.c | 12 ++-
.../ethernet/mellanox/mlx5/core/mlx5_core.h | 10 ++
.../net/ethernet/mellanox/mlx5/core/pci_irq.c | 20 ++++
.../ethernet/mellanox/mlx5/core/sf/dev/dev.c | 10 ++
.../ethernet/mellanox/mlx5/core/sf/dev/dev.h | 20 ++++
.../mellanox/mlx5/core/sf/dev/driver.c | 101 ++++++++++++++++++
include/linux/mlx5/driver.h | 4 +-
10 files changed, 187 insertions(+), 6 deletions(-)
create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/sf/dev/driver.c
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Makefile b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
index f5b2e9101348..43fa5efd403c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/Makefile
+++ b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
@@ -89,4 +89,4 @@ mlx5_core-$(CONFIG_MLX5_SW_STEERING) += steering/dr_domain.o steering/dr_table.o
#
# SF device
#
-mlx5_core-$(CONFIG_MLX5_SF) += sf/vhca_event.o sf/dev/dev.o
+mlx5_core-$(CONFIG_MLX5_SF) += sf/vhca_event.o sf/dev/dev.o sf/dev/driver.o
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index 3261d0dc1104..9afe918c5827 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -7,6 +7,7 @@
#include "fw_reset.h"
#include "fs_core.h"
#include "eswitch.h"
+#include "sf/dev/dev.h"
static int mlx5_devlink_flash_update(struct devlink *devlink,
struct devlink_flash_update_params *params,
@@ -127,6 +128,17 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
struct netlink_ext_ack *extack)
{
struct mlx5_core_dev *dev = devlink_priv(devlink);
+ bool sf_dev_allocated;
+
+ sf_dev_allocated = mlx5_sf_dev_allocated(dev);
+ if (sf_dev_allocated) {
+ /* Reload results in deleting SF device which further results in
+ * unregistering devlink instance while holding devlink_mutext.
+ * Hence, do not support reload.
+ */
+ NL_SET_ERR_MSG_MOD(extack, "reload is unsupported when SFs are allocated\n");
+ return -EOPNOTSUPP;
+ }
switch (action) {
case DEVLINK_RELOAD_ACTION_DRIVER_REINIT:
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index 421febebc658..174dfbc996c6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -467,7 +467,7 @@ int mlx5_eq_table_init(struct mlx5_core_dev *dev)
for (i = 0; i < MLX5_EVENT_TYPE_MAX; i++)
ATOMIC_INIT_NOTIFIER_HEAD(&eq_table->nh[i]);
- eq_table->irq_table = dev->priv.irq_table;
+ eq_table->irq_table = mlx5_irq_table_get(dev);
return 0;
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 26b5502712a6..ab68320e5516 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -84,7 +84,6 @@ unsigned int mlx5_core_debug_mask;
module_param_named(debug_mask, mlx5_core_debug_mask, uint, 0644);
MODULE_PARM_DESC(debug_mask, "debug mask: 1 = dump cmd data, 2 = dump cmd exec time, 3 = both. Default=0");
-#define MLX5_DEFAULT_PROF 2
static unsigned int prof_sel = MLX5_DEFAULT_PROF;
module_param_named(prof_sel, prof_sel, uint, 0444);
MODULE_PARM_DESC(prof_sel, "profile selector. Valid range 0 - 2");
@@ -1303,7 +1302,7 @@ void mlx5_unload_one(struct mlx5_core_dev *dev, bool cleanup)
mutex_unlock(&dev->intf_state_mutex);
}
-static int mlx5_mdev_init(struct mlx5_core_dev *dev, int profile_idx)
+int mlx5_mdev_init(struct mlx5_core_dev *dev, int profile_idx)
{
struct mlx5_priv *priv = &dev->priv;
int err;
@@ -1353,7 +1352,7 @@ static int mlx5_mdev_init(struct mlx5_core_dev *dev, int profile_idx)
return err;
}
-static void mlx5_mdev_uninit(struct mlx5_core_dev *dev)
+void mlx5_mdev_uninit(struct mlx5_core_dev *dev)
{
struct mlx5_priv *priv = &dev->priv;
@@ -1696,6 +1695,10 @@ static int __init init(void)
if (err)
goto err_debug;
+ err = mlx5_sf_driver_register();
+ if (err)
+ goto err_sf;
+
#ifdef CONFIG_MLX5_CORE_EN
err = mlx5e_init();
if (err) {
@@ -1706,6 +1709,8 @@ static int __init init(void)
return 0;
+err_sf:
+ pci_unregister_driver(&mlx5_core_driver);
err_debug:
mlx5_unregister_debugfs();
return err;
@@ -1716,6 +1721,7 @@ static void __exit cleanup(void)
#ifdef CONFIG_MLX5_CORE_EN
mlx5e_cleanup();
#endif
+ mlx5_sf_driver_unregister();
pci_unregister_driver(&mlx5_core_driver);
mlx5_unregister_debugfs();
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
index a33b7496d748..3754ef98554f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
@@ -117,6 +117,8 @@ enum mlx5_semaphore_space_address {
MLX5_SEMAPHORE_SW_RESET = 0x20,
};
+#define MLX5_DEFAULT_PROF 2
+
int mlx5_query_hca_caps(struct mlx5_core_dev *dev);
int mlx5_query_board_id(struct mlx5_core_dev *dev);
int mlx5_cmd_init(struct mlx5_core_dev *dev);
@@ -176,6 +178,7 @@ struct cpumask *
mlx5_irq_get_affinity_mask(struct mlx5_irq_table *irq_table, int vecidx);
struct cpu_rmap *mlx5_irq_get_rmap(struct mlx5_irq_table *table);
int mlx5_irq_get_num_comp(struct mlx5_irq_table *table);
+struct mlx5_irq_table *mlx5_irq_table_get(struct mlx5_core_dev *dev);
int mlx5_events_init(struct mlx5_core_dev *dev);
void mlx5_events_cleanup(struct mlx5_core_dev *dev);
@@ -257,6 +260,13 @@ enum {
u8 mlx5_get_nic_state(struct mlx5_core_dev *dev);
void mlx5_set_nic_state(struct mlx5_core_dev *dev, u8 state);
+static inline bool mlx5_core_is_sf(const struct mlx5_core_dev *dev)
+{
+ return dev->coredev_type == MLX5_COREDEV_SF;
+}
+
+int mlx5_mdev_init(struct mlx5_core_dev *dev, int profile_idx);
+void mlx5_mdev_uninit(struct mlx5_core_dev *dev);
void mlx5_unload_one(struct mlx5_core_dev *dev, bool cleanup);
int mlx5_load_one(struct mlx5_core_dev *dev, bool boot);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
index 6fd974920394..a61e09aff152 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
@@ -30,6 +30,9 @@ int mlx5_irq_table_init(struct mlx5_core_dev *dev)
{
struct mlx5_irq_table *irq_table;
+ if (mlx5_core_is_sf(dev))
+ return 0;
+
irq_table = kvzalloc(sizeof(*irq_table), GFP_KERNEL);
if (!irq_table)
return -ENOMEM;
@@ -40,6 +43,9 @@ int mlx5_irq_table_init(struct mlx5_core_dev *dev)
void mlx5_irq_table_cleanup(struct mlx5_core_dev *dev)
{
+ if (mlx5_core_is_sf(dev))
+ return;
+
kvfree(dev->priv.irq_table);
}
@@ -268,6 +274,9 @@ int mlx5_irq_table_create(struct mlx5_core_dev *dev)
int nvec;
int err;
+ if (mlx5_core_is_sf(dev))
+ return 0;
+
nvec = MLX5_CAP_GEN(dev, num_ports) * num_online_cpus() +
MLX5_IRQ_VEC_COMP_BASE;
nvec = min_t(int, nvec, num_eqs);
@@ -319,6 +328,9 @@ void mlx5_irq_table_destroy(struct mlx5_core_dev *dev)
struct mlx5_irq_table *table = dev->priv.irq_table;
int i;
+ if (mlx5_core_is_sf(dev))
+ return;
+
/* free_irq requires that affinity and rmap will be cleared
* before calling it. This is why there is asymmetry with set_rmap
* which should be called after alloc_irq but before request_irq.
@@ -332,3 +344,11 @@ void mlx5_irq_table_destroy(struct mlx5_core_dev *dev)
kfree(table->irq);
}
+struct mlx5_irq_table *mlx5_irq_table_get(struct mlx5_core_dev *dev)
+{
+#ifdef CONFIG_MLX5_SF
+ if (mlx5_core_is_sf(dev))
+ return dev->priv.parent_mdev->priv.irq_table;
+#endif
+ return dev->priv.irq_table;
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.c b/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.c
index 4a8eeb7c853e..b265f27b2166 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.c
@@ -24,6 +24,16 @@ static bool mlx5_sf_dev_supported(const struct mlx5_core_dev *dev)
return MLX5_CAP_GEN(dev, sf) && mlx5_vhca_event_supported(dev);
}
+bool mlx5_sf_dev_allocated(const struct mlx5_core_dev *dev)
+{
+ struct mlx5_sf_dev_table *table = dev->priv.sf_dev_table;
+
+ if (!mlx5_sf_dev_supported(dev))
+ return false;
+
+ return !xa_empty(&table->devices);
+}
+
static ssize_t sfnum_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct auxiliary_device *adev = container_of(dev, struct auxiliary_device, dev);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.h b/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.h
index a6fb7289ba2c..4de02902aef1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.h
@@ -13,6 +13,7 @@
struct mlx5_sf_dev {
struct auxiliary_device adev;
struct mlx5_core_dev *parent_mdev;
+ struct mlx5_core_dev *mdev;
phys_addr_t bar_base_addr;
u32 sfnum;
};
@@ -20,6 +21,11 @@ struct mlx5_sf_dev {
void mlx5_sf_dev_table_create(struct mlx5_core_dev *dev);
void mlx5_sf_dev_table_destroy(struct mlx5_core_dev *dev);
+int mlx5_sf_driver_register(void);
+void mlx5_sf_driver_unregister(void);
+
+bool mlx5_sf_dev_allocated(const struct mlx5_core_dev *dev);
+
#else
static inline void mlx5_sf_dev_table_create(struct mlx5_core_dev *dev)
@@ -30,6 +36,20 @@ static inline void mlx5_sf_dev_table_destroy(struct mlx5_core_dev *dev)
{
}
+static inline int mlx5_sf_driver_register(void)
+{
+ return 0;
+}
+
+static inline void mlx5_sf_driver_unregister(void)
+{
+}
+
+static inline bool mlx5_sf_dev_allocated(const struct mlx5_core_dev *dev)
+{
+ return 0;
+}
+
#endif
#endif
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/driver.c b/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/driver.c
new file mode 100644
index 000000000000..daf63a8115e0
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/driver.c
@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2020 Mellanox Technologies Ltd */
+
+#include <linux/mlx5/driver.h>
+#include <linux/mlx5/device.h>
+#include "mlx5_core.h"
+#include "dev.h"
+#include "devlink.h"
+
+static int mlx5_sf_dev_probe(struct auxiliary_device *adev, const struct auxiliary_device_id *id)
+{
+ struct mlx5_sf_dev *sf_dev = container_of(adev, struct mlx5_sf_dev, adev);
+ struct mlx5_core_dev *mdev;
+ struct devlink *devlink;
+ int err;
+
+ devlink = mlx5_devlink_alloc();
+ if (!devlink)
+ return -ENOMEM;
+
+ mdev = devlink_priv(devlink);
+ mdev->device = &adev->dev;
+ mdev->pdev = sf_dev->parent_mdev->pdev;
+ mdev->bar_addr = sf_dev->bar_base_addr;
+ mdev->iseg_base = sf_dev->bar_base_addr;
+ mdev->coredev_type = MLX5_COREDEV_SF;
+ mdev->priv.parent_mdev = sf_dev->parent_mdev;
+ mdev->priv.adev_idx = adev->id;
+ sf_dev->mdev = mdev;
+
+ err = mlx5_mdev_init(mdev, MLX5_DEFAULT_PROF);
+ if (err) {
+ mlx5_core_warn(mdev, "mlx5_mdev_init on err=%d\n", err);
+ goto mdev_err;
+ }
+
+ mdev->iseg = ioremap(mdev->iseg_base, sizeof(*mdev->iseg));
+ if (!mdev->iseg) {
+ mlx5_core_warn(mdev, "remap error\n");
+ goto remap_err;
+ }
+
+ err = mlx5_load_one(mdev, true);
+ if (err) {
+ mlx5_core_warn(mdev, "mlx5_load_one err=%d\n", err);
+ goto load_one_err;
+ }
+ return 0;
+
+load_one_err:
+ iounmap(mdev->iseg);
+remap_err:
+ mlx5_mdev_uninit(mdev);
+mdev_err:
+ mlx5_devlink_free(devlink);
+ return err;
+}
+
+static void mlx5_sf_dev_remove(struct auxiliary_device *adev)
+{
+ struct mlx5_sf_dev *sf_dev = container_of(adev, struct mlx5_sf_dev, adev);
+ struct devlink *devlink;
+
+ devlink = priv_to_devlink(sf_dev->mdev);
+ mlx5_unload_one(sf_dev->mdev, true);
+ iounmap(sf_dev->mdev->iseg);
+ mlx5_mdev_uninit(sf_dev->mdev);
+ mlx5_devlink_free(devlink);
+}
+
+static void mlx5_sf_dev_shutdown(struct auxiliary_device *adev)
+{
+ struct mlx5_sf_dev *sf_dev = container_of(adev, struct mlx5_sf_dev, adev);
+
+ mlx5_unload_one(sf_dev->mdev, false);
+}
+
+static const struct auxiliary_device_id mlx5_sf_dev_id_table[] = {
+ { .name = MLX5_ADEV_NAME "." MLX5_SF_DEV_ID_NAME, },
+ { },
+};
+
+MODULE_DEVICE_TABLE(auxiliary, mlx5_sf_dev_id_table);
+
+static struct auxiliary_driver mlx5_sf_driver = {
+ .name = MLX5_SF_DEV_ID_NAME,
+ .probe = mlx5_sf_dev_probe,
+ .remove = mlx5_sf_dev_remove,
+ .shutdown = mlx5_sf_dev_shutdown,
+ .id_table = mlx5_sf_dev_id_table,
+};
+
+int mlx5_sf_driver_register(void)
+{
+ return auxiliary_driver_register(&mlx5_sf_driver);
+}
+
+void mlx5_sf_driver_unregister(void)
+{
+ auxiliary_driver_unregister(&mlx5_sf_driver);
+}
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 08e5fbe97df0..48e3638b1185 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -193,7 +193,8 @@ enum port_state_policy {
enum mlx5_coredev_type {
MLX5_COREDEV_PF,
- MLX5_COREDEV_VF
+ MLX5_COREDEV_VF,
+ MLX5_COREDEV_SF,
};
struct mlx5_field_desc {
@@ -608,6 +609,7 @@ struct mlx5_priv {
#ifdef CONFIG_MLX5_SF
struct mlx5_vhca_state_notifier *vhca_state_notifier;
struct mlx5_sf_dev_table *sf_dev_table;
+ struct mlx5_core_dev *parent_mdev;
#endif
};
--
2.26.2
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