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