drivers/net/ethernet/sfc/ethtool_common.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/sfc/ethtool_common.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/sfc/ethtool_common.c
Extension
.c
Size
38810 bytes
Lines
1333
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 efx_sw_stat_desc {
	const char *name;
	enum {
		EFX_ETHTOOL_STAT_SOURCE_nic,
		EFX_ETHTOOL_STAT_SOURCE_channel,
		EFX_ETHTOOL_STAT_SOURCE_tx_queue
	} source;
	unsigned int offset;
	u64 (*get_stat)(void *field); /* Reader function */
};

/* Initialiser for a struct efx_sw_stat_desc with type-checking */
#define EFX_ETHTOOL_STAT(stat_name, source_name, field, field_type, \
				get_stat_function) {			\
	.name = #stat_name,						\
	.source = EFX_ETHTOOL_STAT_SOURCE_##source_name,		\
	.offset = ((((field_type *) 0) ==				\
		      &((struct efx_##source_name *)0)->field) ?	\
		    offsetof(struct efx_##source_name, field) :		\
		    offsetof(struct efx_##source_name, field)),		\
	.get_stat = get_stat_function,					\
}

static u64 efx_get_uint_stat(void *field)
{
	return *(unsigned int *)field;
}

static u64 efx_get_atomic_stat(void *field)
{
	return atomic_read((atomic_t *) field);
}

#define EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(field)		\
	EFX_ETHTOOL_STAT(field, nic, field,			\
			 atomic_t, efx_get_atomic_stat)

#define EFX_ETHTOOL_UINT_CHANNEL_STAT(field)			\
	EFX_ETHTOOL_STAT(field, channel, n_##field,		\
			 unsigned int, efx_get_uint_stat)
#define EFX_ETHTOOL_UINT_CHANNEL_STAT_NO_N(field)		\
	EFX_ETHTOOL_STAT(field, channel, field,			\
			 unsigned int, efx_get_uint_stat)

#define EFX_ETHTOOL_UINT_TXQ_STAT(field)			\
	EFX_ETHTOOL_STAT(tx_##field, tx_queue, field,		\
			 unsigned int, efx_get_uint_stat)

static const struct efx_sw_stat_desc efx_sw_stat_desc[] = {
	EFX_ETHTOOL_UINT_TXQ_STAT(merge_events),
	EFX_ETHTOOL_UINT_TXQ_STAT(tso_bursts),
	EFX_ETHTOOL_UINT_TXQ_STAT(tso_long_headers),
	EFX_ETHTOOL_UINT_TXQ_STAT(tso_packets),
	EFX_ETHTOOL_UINT_TXQ_STAT(tso_fallbacks),
	EFX_ETHTOOL_UINT_TXQ_STAT(pushes),
	EFX_ETHTOOL_UINT_TXQ_STAT(pio_packets),
	EFX_ETHTOOL_UINT_TXQ_STAT(cb_packets),
	EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(rx_reset),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_ip_hdr_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_tcp_udp_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_inner_ip_hdr_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_inner_tcp_udp_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_outer_ip_hdr_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_outer_tcp_udp_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_eth_crc_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_frm_trunc),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_overlength),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_merge_events),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_merge_packets),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_xdp_drops),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_xdp_bad_drops),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_xdp_tx),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_xdp_redirect),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_mport_bad),
#ifdef CONFIG_RFS_ACCEL
	EFX_ETHTOOL_UINT_CHANNEL_STAT_NO_N(rfs_filter_count),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rfs_succeeded),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rfs_failed),
#endif
};

#define EFX_ETHTOOL_SW_STAT_COUNT ARRAY_SIZE(efx_sw_stat_desc)

void efx_ethtool_get_drvinfo(struct net_device *net_dev,
			     struct ethtool_drvinfo *info)
{
	struct efx_nic *efx = efx_netdev_priv(net_dev);

	strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
	efx_mcdi_print_fwver(efx, info->fw_version,

Annotation

Implementation Notes