drivers/net/ethernet/netronome/nfp/devlink_param.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/netronome/nfp/devlink_param.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/netronome/nfp/devlink_param.c
Extension
.c
Size
6701 bytes
Lines
253
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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,
			 struct netlink_ext_ack *extack)
{
	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);

Annotation

Implementation Notes