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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2019 Netronome Systems, Inc. */
#include <net/devlink.h>
#include "nfpcore/nfp.h"
#include "nfpcore/nfp_nsp.h"
#include "nfp_main.h"
/**
* struct nfp_devlink_param_u8_arg - Devlink u8 parameter get/set arguments
* @hwinfo_name: HWinfo key name
* @default_hi_val: Default HWinfo value if HWinfo doesn't exist
* @invalid_dl_val: Devlink value to use if HWinfo is unknown/invalid.
* -errno if there is no unknown/invalid value available
* @hi_to_dl: HWinfo to devlink value mapping
* @dl_to_hi: Devlink to hwinfo value mapping
* @max_dl_val: Maximum devlink value supported, for validation only
* @max_hi_val: Maximum HWinfo value supported, for validation only
*/
struct nfp_devlink_param_u8_arg {
const char *hwinfo_name;
const char *default_hi_val;
int invalid_dl_val;
u8 hi_to_dl[4];
u8 dl_to_hi[4];
u8 max_dl_val;
u8 max_hi_val;
};
static const struct nfp_devlink_param_u8_arg nfp_devlink_u8_args[] = {
[DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY] = {
.hwinfo_name = "app_fw_from_flash",
.default_hi_val = NFP_NSP_APP_FW_LOAD_DEFAULT,
.invalid_dl_val =
DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_UNKNOWN,
.hi_to_dl = {
[NFP_NSP_APP_FW_LOAD_DISK] =
DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK,
[NFP_NSP_APP_FW_LOAD_FLASH] =
DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH,
[NFP_NSP_APP_FW_LOAD_PREF] =
DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER,
},
.dl_to_hi = {
[DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER] =
NFP_NSP_APP_FW_LOAD_PREF,
[DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH] =
NFP_NSP_APP_FW_LOAD_FLASH,
[DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK] =
NFP_NSP_APP_FW_LOAD_DISK,
},
.max_dl_val = DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK,
.max_hi_val = NFP_NSP_APP_FW_LOAD_PREF,
},
[DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE] = {
.hwinfo_name = "abi_drv_reset",
.default_hi_val = NFP_NSP_DRV_RESET_DEFAULT,
.invalid_dl_val =
DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_UNKNOWN,
.hi_to_dl = {
[NFP_NSP_DRV_RESET_ALWAYS] =
DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_ALWAYS,
[NFP_NSP_DRV_RESET_NEVER] =
DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_NEVER,
[NFP_NSP_DRV_RESET_DISK] =
DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK,
},
.dl_to_hi = {
[DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_ALWAYS] =
NFP_NSP_DRV_RESET_ALWAYS,
[DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_NEVER] =
NFP_NSP_DRV_RESET_NEVER,
[DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK] =
NFP_NSP_DRV_RESET_DISK,
},
.max_dl_val = DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK,
.max_hi_val = NFP_NSP_DRV_RESET_NEVER,
}
};
static int
nfp_devlink_param_u8_get(struct devlink *devlink, u32 id,
struct devlink_param_gset_ctx *ctx)
{
const struct nfp_devlink_param_u8_arg *arg;
struct nfp_pf *pf = devlink_priv(devlink);
struct nfp_nsp *nsp;
char hwinfo[32];
long value;
int err;
if (id >= ARRAY_SIZE(nfp_devlink_u8_args))
return -EOPNOTSUPP;
arg = &nfp_devlink_u8_args[id];
nsp = nfp_nsp_open(pf->cpp);
if (IS_ERR(nsp)) {
err = PTR_ERR(nsp);
nfp_warn(pf->cpp, "can't access NSP: %d\n", err);
return err;
}
snprintf(hwinfo, sizeof(hwinfo), arg->hwinfo_name);
err = nfp_nsp_hwinfo_lookup_optional(nsp, hwinfo, sizeof(hwinfo),
arg->default_hi_val);
if (err) {
nfp_warn(pf->cpp, "HWinfo lookup failed: %d\n", err);
goto exit_close_nsp;
}
err = kstrtol(hwinfo, 0, &value);
if (err || value < 0 || value > arg->max_hi_val) {
nfp_warn(pf->cpp, "HWinfo '%s' value %li invalid\n",
arg->hwinfo_name, value);
if (arg->invalid_dl_val >= 0)
ctx->val.vu8 = arg->invalid_dl_val;
else
err = arg->invalid_dl_val;
goto exit_close_nsp;
}
ctx->val.vu8 = arg->hi_to_dl[value];
exit_close_nsp:
nfp_nsp_close(nsp);
return err;
}
static int
nfp_devlink_param_u8_set(struct devlink *devlink, u32 id,
struct devlink_param_gset_ctx *ctx)
{
const struct nfp_devlink_param_u8_arg *arg;
struct nfp_pf *pf = devlink_priv(devlink);
struct nfp_nsp *nsp;
char hwinfo[32];
int err;
if (id >= ARRAY_SIZE(nfp_devlink_u8_args))
return -EOPNOTSUPP;
arg = &nfp_devlink_u8_args[id];
nsp = nfp_nsp_open(pf->cpp);
if (IS_ERR(nsp)) {
err = PTR_ERR(nsp);
nfp_warn(pf->cpp, "can't access NSP: %d\n", err);
return err;
}
/* Note the value has already been validated. */
snprintf(hwinfo, sizeof(hwinfo), "%s=%u",
arg->hwinfo_name, arg->dl_to_hi[ctx->val.vu8]);
err = nfp_nsp_hwinfo_set(nsp, hwinfo, sizeof(hwinfo));
if (err) {
nfp_warn(pf->cpp, "HWinfo set failed: %d\n", err);
goto exit_close_nsp;
}
exit_close_nsp:
nfp_nsp_close(nsp);
return err;
}
static int
nfp_devlink_param_u8_validate(struct devlink *devlink, u32 id,
union devlink_param_value val,
struct netlink_ext_ack *extack)
{
const struct nfp_devlink_param_u8_arg *arg;
if (id >= ARRAY_SIZE(nfp_devlink_u8_args))
return -EOPNOTSUPP;
arg = &nfp_devlink_u8_args[id];
if (val.vu8 > arg->max_dl_val) {
NL_SET_ERR_MSG_MOD(extack, "parameter out of range");
return -EINVAL;
}
if (val.vu8 == arg->invalid_dl_val) {
NL_SET_ERR_MSG_MOD(extack, "unknown/invalid value specified");
return -EINVAL;
}
return 0;
}
static const struct devlink_param nfp_devlink_params[] = {
DEVLINK_PARAM_GENERIC(FW_LOAD_POLICY,
BIT(DEVLINK_PARAM_CMODE_PERMANENT),
nfp_devlink_param_u8_get,
nfp_devlink_param_u8_set,
nfp_devlink_param_u8_validate),
DEVLINK_PARAM_GENERIC(RESET_DEV_ON_DRV_PROBE,
BIT(DEVLINK_PARAM_CMODE_PERMANENT),
nfp_devlink_param_u8_get,
nfp_devlink_param_u8_set,
nfp_devlink_param_u8_validate),
};
static int nfp_devlink_supports_params(struct nfp_pf *pf)
{
struct nfp_nsp *nsp;
bool supported;
int err;
nsp = nfp_nsp_open(pf->cpp);
if (IS_ERR(nsp)) {
err = PTR_ERR(nsp);
dev_err(&pf->pdev->dev, "Failed to access the NSP: %d\n", err);
return err;
}
supported = nfp_nsp_has_hwinfo_lookup(nsp) &&
nfp_nsp_has_hwinfo_set(nsp);
nfp_nsp_close(nsp);
return supported;
}
int nfp_devlink_params_register(struct nfp_pf *pf)
{
struct devlink *devlink = priv_to_devlink(pf);
int err;
err = nfp_devlink_supports_params(pf);
if (err <= 0)
return err;
err = devlink_params_register(devlink, nfp_devlink_params,
ARRAY_SIZE(nfp_devlink_params));
if (err)
return err;
devlink_params_publish(devlink);
return 0;
}
void nfp_devlink_params_unregister(struct nfp_pf *pf)
{
int err;
err = nfp_devlink_supports_params(pf);
if (err <= 0)
return;
devlink_params_unregister(priv_to_devlink(pf), nfp_devlink_params,
ARRAY_SIZE(nfp_devlink_params));
}
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