1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2019 Netronome Systems, Inc. */
4 #include <net/devlink.h>
6 #include "nfpcore/nfp.h"
7 #include "nfpcore/nfp_nsp.h"
11 * struct nfp_devlink_param_u8_arg - Devlink u8 parameter get/set arguments
12 * @hwinfo_name: HWinfo key name
13 * @default_hi_val: Default HWinfo value if HWinfo doesn't exist
14 * @invalid_dl_val: Devlink value to use if HWinfo is unknown/invalid.
15 * -errno if there is no unknown/invalid value available
16 * @hi_to_dl: HWinfo to devlink value mapping
17 * @dl_to_hi: Devlink to hwinfo value mapping
18 * @max_dl_val: Maximum devlink value supported, for validation only
19 * @max_hi_val: Maximum HWinfo value supported, for validation only
21 struct nfp_devlink_param_u8_arg {
22 const char *hwinfo_name;
23 const char *default_hi_val;
31 static const struct nfp_devlink_param_u8_arg nfp_devlink_u8_args[] = {
32 [DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY] = {
33 .hwinfo_name = "app_fw_from_flash",
34 .default_hi_val = NFP_NSP_APP_FW_LOAD_DEFAULT,
36 DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_UNKNOWN,
38 [NFP_NSP_APP_FW_LOAD_DISK] =
39 DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK,
40 [NFP_NSP_APP_FW_LOAD_FLASH] =
41 DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH,
42 [NFP_NSP_APP_FW_LOAD_PREF] =
43 DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER,
46 [DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER] =
47 NFP_NSP_APP_FW_LOAD_PREF,
48 [DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH] =
49 NFP_NSP_APP_FW_LOAD_FLASH,
50 [DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK] =
51 NFP_NSP_APP_FW_LOAD_DISK,
53 .max_dl_val = DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK,
54 .max_hi_val = NFP_NSP_APP_FW_LOAD_PREF,
56 [DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE] = {
57 .hwinfo_name = "abi_drv_reset",
58 .default_hi_val = NFP_NSP_DRV_RESET_DEFAULT,
60 DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_UNKNOWN,
62 [NFP_NSP_DRV_RESET_ALWAYS] =
63 DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_ALWAYS,
64 [NFP_NSP_DRV_RESET_NEVER] =
65 DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_NEVER,
66 [NFP_NSP_DRV_RESET_DISK] =
67 DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK,
70 [DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_ALWAYS] =
71 NFP_NSP_DRV_RESET_ALWAYS,
72 [DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_NEVER] =
73 NFP_NSP_DRV_RESET_NEVER,
74 [DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK] =
75 NFP_NSP_DRV_RESET_DISK,
77 .max_dl_val = DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK,
78 .max_hi_val = NFP_NSP_DRV_RESET_NEVER,
83 nfp_devlink_param_u8_get(struct devlink *devlink, u32 id,
84 struct devlink_param_gset_ctx *ctx)
86 const struct nfp_devlink_param_u8_arg *arg;
87 struct nfp_pf *pf = devlink_priv(devlink);
93 if (id >= ARRAY_SIZE(nfp_devlink_u8_args))
96 arg = &nfp_devlink_u8_args[id];
98 nsp = nfp_nsp_open(pf->cpp);
101 nfp_warn(pf->cpp, "can't access NSP: %d\n", err);
105 snprintf(hwinfo, sizeof(hwinfo), arg->hwinfo_name);
106 err = nfp_nsp_hwinfo_lookup_optional(nsp, hwinfo, sizeof(hwinfo),
107 arg->default_hi_val);
109 nfp_warn(pf->cpp, "HWinfo lookup failed: %d\n", err);
113 err = kstrtol(hwinfo, 0, &value);
114 if (err || value < 0 || value > arg->max_hi_val) {
115 nfp_warn(pf->cpp, "HWinfo '%s' value %li invalid\n",
116 arg->hwinfo_name, value);
118 if (arg->invalid_dl_val >= 0)
119 ctx->val.vu8 = arg->invalid_dl_val;
121 err = arg->invalid_dl_val;
126 ctx->val.vu8 = arg->hi_to_dl[value];
134 nfp_devlink_param_u8_set(struct devlink *devlink, u32 id,
135 struct devlink_param_gset_ctx *ctx)
137 const struct nfp_devlink_param_u8_arg *arg;
138 struct nfp_pf *pf = devlink_priv(devlink);
143 if (id >= ARRAY_SIZE(nfp_devlink_u8_args))
146 arg = &nfp_devlink_u8_args[id];
148 nsp = nfp_nsp_open(pf->cpp);
151 nfp_warn(pf->cpp, "can't access NSP: %d\n", err);
155 /* Note the value has already been validated. */
156 snprintf(hwinfo, sizeof(hwinfo), "%s=%u",
157 arg->hwinfo_name, arg->dl_to_hi[ctx->val.vu8]);
158 err = nfp_nsp_hwinfo_set(nsp, hwinfo, sizeof(hwinfo));
160 nfp_warn(pf->cpp, "HWinfo set failed: %d\n", err);
170 nfp_devlink_param_u8_validate(struct devlink *devlink, u32 id,
171 union devlink_param_value val,
172 struct netlink_ext_ack *extack)
174 const struct nfp_devlink_param_u8_arg *arg;
176 if (id >= ARRAY_SIZE(nfp_devlink_u8_args))
179 arg = &nfp_devlink_u8_args[id];
181 if (val.vu8 > arg->max_dl_val) {
182 NL_SET_ERR_MSG_MOD(extack, "parameter out of range");
186 if (val.vu8 == arg->invalid_dl_val) {
187 NL_SET_ERR_MSG_MOD(extack, "unknown/invalid value specified");
194 static const struct devlink_param nfp_devlink_params[] = {
195 DEVLINK_PARAM_GENERIC(FW_LOAD_POLICY,
196 BIT(DEVLINK_PARAM_CMODE_PERMANENT),
197 nfp_devlink_param_u8_get,
198 nfp_devlink_param_u8_set,
199 nfp_devlink_param_u8_validate),
200 DEVLINK_PARAM_GENERIC(RESET_DEV_ON_DRV_PROBE,
201 BIT(DEVLINK_PARAM_CMODE_PERMANENT),
202 nfp_devlink_param_u8_get,
203 nfp_devlink_param_u8_set,
204 nfp_devlink_param_u8_validate),
207 static int nfp_devlink_supports_params(struct nfp_pf *pf)
213 nsp = nfp_nsp_open(pf->cpp);
216 dev_err(&pf->pdev->dev, "Failed to access the NSP: %d\n", err);
220 supported = nfp_nsp_has_hwinfo_lookup(nsp) &&
221 nfp_nsp_has_hwinfo_set(nsp);
227 int nfp_devlink_params_register(struct nfp_pf *pf)
229 struct devlink *devlink = priv_to_devlink(pf);
232 err = nfp_devlink_supports_params(pf);
236 err = devlink_params_register(devlink, nfp_devlink_params,
237 ARRAY_SIZE(nfp_devlink_params));
241 devlink_params_publish(devlink);
245 void nfp_devlink_params_unregister(struct nfp_pf *pf)
249 err = nfp_devlink_supports_params(pf);
253 devlink_params_unregister(priv_to_devlink(pf), nfp_devlink_params,
254 ARRAY_SIZE(nfp_devlink_params));