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Merge branch 'mlxsw-fw_load_policy' 

Ido Schimmel says:

====================
mlxsw: Add 'fw_load_policy' devlink parameter

Shalom says:

Currently, drivers do not have the ability to control the firmware
loading policy and they always use their own fixed policy. This prevents
drivers from running the device with a different firmware version for
testing and/or debugging purposes. For example, testing a firmware bug
fix.

For these situations, the new devlink generic parameter,
'fw_load_policy', gives the ability to control this option and allows
drivers to run with a different firmware version than required by the
driver.

Patch #1 adds the new parameter to devlink. The other two patches, #2
and #3, add support for this parameter in the mlxsw driver.

Example:
  # Query the devlink parameters supported by the device
    $ devlink dev param show
    pci/0000:03:00.0:
      name fw_load_policy type generic
        values:
          cmode driverinit value driver

  # Flash new firmware using ethtool
    $ ethtool -f swp1 mellanox/mlxsw_spectrum-13.1703.4.mfa2

  # Toggle parameter
    $ devlink dev param set pci/0000:03:00.0 name fw_load_policy value flash cmode driverinit

  # devlink reset
    $ devlink dev reload pci/0000:03:00.0

  # Query firmware version to show changes took affect
    $ ethtool -i swp1
    driver: mlxsw_spectrum
    version: 1.0
    firmware-version: 13.1703.4
    expansion-rom-version:
    bus-info: 0000:03:00.0
    supports-statistics: yes
    supports-test: no
    supports-eeprom-access: no
    supports-register-dump: no
    supports-priv-flags: no

iproute2 patches available here:
https://github.com/tshalom/iproute2-next

v2:
* Change 'fw_version_check' to 'fw_load_policy' with values 'driver' and
  'flash' (Jakub)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-12-03 13:55:44 -08:00
parent 6915bf3b00 064501c5b6
commit e3dd762772
8 changed files with 127 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
Documentation/networking/devlink-params.txt
View File

@ -40,3 +40,12 @@ msix_vec_per_pf_min [DEVICE, GENERIC]
for the device initialization. Value is same across all
physical functions (PFs) in the device.
Type: u32
fw_load_policy [DEVICE, GENERIC]
Controls the device's firmware loading policy.
Valid values:
* DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER (0)
Load firmware version preferred by the driver.
* DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH (1)
Load firmware currently stored in flash.
Type: u8

45
drivers/net/ethernet/mellanox/mlxsw/core.c
View File

@ -965,10 +965,11 @@ static const struct devlink_ops mlxsw_devlink_ops = {
.sb_occ_tc_port_bind_get = mlxsw_devlink_sb_occ_tc_port_bind_get,
};
int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
const struct mlxsw_bus *mlxsw_bus,
void *bus_priv, bool reload,
struct devlink *devlink)
static int
__mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
const struct mlxsw_bus *mlxsw_bus,
void *bus_priv, bool reload,
struct devlink *devlink)
{
const char *device_kind = mlxsw_bus_info->device_kind;
struct mlxsw_core *mlxsw_core;
@ -1035,6 +1036,12 @@ int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
goto err_devlink_register;
}
if (mlxsw_driver->params_register && !reload) {
err = mlxsw_driver->params_register(mlxsw_core);
if (err)
goto err_register_params;
}
err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon);
if (err)
goto err_hwmon_init;
@ -1057,6 +1064,9 @@ err_driver_init:
err_thermal_init:
mlxsw_hwmon_fini(mlxsw_core->hwmon);
err_hwmon_init:
if (mlxsw_driver->params_unregister && !reload)
mlxsw_driver->params_unregister(mlxsw_core);
err_register_params:
if (!reload)
devlink_unregister(devlink);
err_devlink_register:
@ -1076,6 +1086,29 @@ err_bus_init:
err_devlink_alloc:
return err;
}
int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
const struct mlxsw_bus *mlxsw_bus,
void *bus_priv, bool reload,
struct devlink *devlink)
{
bool called_again = false;
int err;
again:
err = __mlxsw_core_bus_device_register(mlxsw_bus_info, mlxsw_bus,
bus_priv, reload, devlink);
/* -EAGAIN is returned in case the FW was updated. FW needs
* a reset, so lets try to call __mlxsw_core_bus_device_register()
* again.
*/
if (err == -EAGAIN && !called_again) {
called_again = true;
goto again;
}
return err;
}
EXPORT_SYMBOL(mlxsw_core_bus_device_register);
void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
@ -1097,6 +1130,8 @@ void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
mlxsw_core->driver->fini(mlxsw_core);
mlxsw_thermal_fini(mlxsw_core->thermal);
mlxsw_hwmon_fini(mlxsw_core->hwmon);
if (mlxsw_core->driver->params_unregister && !reload)
mlxsw_core->driver->params_unregister(mlxsw_core);
if (!reload)
devlink_unregister(devlink);
mlxsw_emad_fini(mlxsw_core);
@ -1109,6 +1144,8 @@ void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
return;
reload_fail_deinit:
if (mlxsw_core->driver->params_unregister)
mlxsw_core->driver->params_unregister(mlxsw_core);
devlink_unregister(devlink);
devlink_resources_unregister(devlink, NULL);
devlink_free(devlink);

2
drivers/net/ethernet/mellanox/mlxsw/core.h
View File

@ -282,6 +282,8 @@ struct mlxsw_driver {
const struct mlxsw_config_profile *profile,
u64 *p_single_size, u64 *p_double_size,
u64 *p_linear_size);
int (*params_register)(struct mlxsw_core *mlxsw_core);
void (*params_unregister)(struct mlxsw_core *mlxsw_core);
u8 txhdr_len;
const struct mlxsw_config_profile *profile;
bool res_query_enabled;

11
drivers/net/ethernet/mellanox/mlxsw/pci.c
View File

@ -1720,7 +1720,6 @@ static int mlxsw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
const char *driver_name = pdev->driver->name;
struct mlxsw_pci *mlxsw_pci;
bool called_again = false;
int err;
mlxsw_pci = kzalloc(sizeof(*mlxsw_pci), GFP_KERNEL);
@ -1777,18 +1776,10 @@ static int mlxsw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
mlxsw_pci->bus_info.dev = &pdev->dev;
mlxsw_pci->id = id;
again:
err = mlxsw_core_bus_device_register(&mlxsw_pci->bus_info,
&mlxsw_pci_bus, mlxsw_pci, false,
NULL);
/* -EAGAIN is returned in case the FW was updated. FW needs
* a reset, so lets try to call mlxsw_core_bus_device_register()
* again.
*/
if (err == -EAGAIN && !called_again) {
called_again = true;
goto again;
} else if (err) {
if (err) {
dev_err(&pdev->dev, "cannot register bus device\n");
goto err_bus_device_register;
}

60
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -318,6 +318,7 @@ static int mlxsw_sp_fw_rev_validate(struct mlxsw_sp *mlxsw_sp)
const struct mlxsw_fw_rev *rev = &mlxsw_sp->bus_info->fw_rev;
const struct mlxsw_fw_rev *req_rev = mlxsw_sp->req_rev;
const char *fw_filename = mlxsw_sp->fw_filename;
union devlink_param_value value;
const struct firmware *firmware;
int err;
@ -325,6 +326,15 @@ static int mlxsw_sp_fw_rev_validate(struct mlxsw_sp *mlxsw_sp)
if (!req_rev || !fw_filename)
return 0;
/* Don't check if devlink 'fw_load_policy' param is 'flash' */
err = devlink_param_driverinit_value_get(priv_to_devlink(mlxsw_sp->core),
DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
&value);
if (err)
return err;
if (value.vu8 == DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH)
return 0;
/* Validate driver & FW are compatible */
if (rev->major != req_rev->major) {
WARN(1, "Mismatch in major FW version [%d:%d] is never expected; Please contact support\n",
@ -4328,6 +4338,52 @@ static int mlxsw_sp_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
return 0;
}
static int
mlxsw_sp_devlink_param_fw_load_policy_validate(struct devlink *devlink, u32 id,
union devlink_param_value val,
struct netlink_ext_ack *extack)
{
if ((val.vu8 != DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER) &&
(val.vu8 != DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH)) {
NL_SET_ERR_MSG_MOD(extack, "'fw_load_policy' must be 'driver' or 'flash'");
return -EINVAL;
}
return 0;
}
static const struct devlink_param mlxsw_sp_devlink_params[] = {
DEVLINK_PARAM_GENERIC(FW_LOAD_POLICY,
BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
NULL, NULL,
mlxsw_sp_devlink_param_fw_load_policy_validate),
};
static int mlxsw_sp_params_register(struct mlxsw_core *mlxsw_core)
{
struct devlink *devlink = priv_to_devlink(mlxsw_core);
union devlink_param_value value;
int err;
err = devlink_params_register(devlink, mlxsw_sp_devlink_params,
ARRAY_SIZE(mlxsw_sp_devlink_params));
if (err)
return err;
value.vu8 = DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER;
devlink_param_driverinit_value_set(devlink,
DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
value);
return 0;
}
static void mlxsw_sp_params_unregister(struct mlxsw_core *mlxsw_core)
{
devlink_params_unregister(priv_to_devlink(mlxsw_core),
mlxsw_sp_devlink_params,
ARRAY_SIZE(mlxsw_sp_devlink_params));
}
static struct mlxsw_driver mlxsw_sp1_driver = {
.kind = mlxsw_sp1_driver_name,
.priv_size = sizeof(struct mlxsw_sp),
@ -4349,6 +4405,8 @@ static struct mlxsw_driver mlxsw_sp1_driver = {
.txhdr_construct = mlxsw_sp_txhdr_construct,
.resources_register = mlxsw_sp1_resources_register,
.kvd_sizes_get = mlxsw_sp_kvd_sizes_get,
.params_register = mlxsw_sp_params_register,
.params_unregister = mlxsw_sp_params_unregister,
.txhdr_len = MLXSW_TXHDR_LEN,
.profile = &mlxsw_sp1_config_profile,
.res_query_enabled = true,
@ -4374,6 +4432,8 @@ static struct mlxsw_driver mlxsw_sp2_driver = {
.sb_occ_tc_port_bind_get = mlxsw_sp_sb_occ_tc_port_bind_get,
.txhdr_construct = mlxsw_sp_txhdr_construct,
.resources_register = mlxsw_sp2_resources_register,
.params_register = mlxsw_sp_params_register,
.params_unregister = mlxsw_sp_params_unregister,
.txhdr_len = MLXSW_TXHDR_LEN,
.profile = &mlxsw_sp2_config_profile,
.res_query_enabled = true,

4
include/net/devlink.h
View File

@ -365,6 +365,7 @@ enum devlink_param_generic_id {
DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
/* add new param generic ids above here*/
__DEVLINK_PARAM_GENERIC_ID_MAX,
@ -392,6 +393,9 @@ enum devlink_param_generic_id {
#define DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME "msix_vec_per_pf_min"
#define DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE DEVLINK_PARAM_TYPE_U32
#define DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME "fw_load_policy"
#define DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE DEVLINK_PARAM_TYPE_U8
#define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate) \
{ \
.id = DEVLINK_PARAM_GENERIC_ID_##_id, \

5
include/uapi/linux/devlink.h
View File

@ -163,6 +163,11 @@ enum devlink_param_cmode {
DEVLINK_PARAM_CMODE_MAX = __DEVLINK_PARAM_CMODE_MAX - 1
};
enum devlink_param_fw_load_policy_value {
DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER,
DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH,
};
enum devlink_attr {
/* don't change the order or add anything between, this is ABI! */
DEVLINK_ATTR_UNSPEC,

5
net/core/devlink.c
View File

@ -2692,6 +2692,11 @@ static const struct devlink_param devlink_param_generic[] = {
.name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
.type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
.name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
.type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
},
};
static int devlink_param_generic_verify(const struct devlink_param *param)