drivers/net/can/c_can/c_can_ethtool.c
Source file repositories/reference/linux-study-clean/drivers/net/can/c_can/c_can_ethtool.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/net/can/c_can/c_can_ethtool.c- Extension
.c- Size
- 803 bytes
- Lines
- 31
- 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.
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/ethtool.hlinux/kernel.hlinux/platform_device.hlinux/netdevice.hlinux/can/dev.hc_can.h
Detected Declarations
function c_can_get_ringparam
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2021, Dario Binacchi <dariobin@libero.it>
*/
#include <linux/ethtool.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/netdevice.h>
#include <linux/can/dev.h>
#include "c_can.h"
static void c_can_get_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring,
struct kernel_ethtool_ringparam *kernel_ring,
struct netlink_ext_ack *extack)
{
struct c_can_priv *priv = netdev_priv(netdev);
ring->rx_max_pending = priv->msg_obj_num;
ring->tx_max_pending = priv->msg_obj_num;
ring->rx_pending = priv->msg_obj_rx_num;
ring->tx_pending = priv->msg_obj_tx_num;
}
const struct ethtool_ops c_can_ethtool_ops = {
.get_ringparam = c_can_get_ringparam,
.get_ts_info = ethtool_op_get_ts_info,
};
Annotation
- Immediate include surface: `linux/ethtool.h`, `linux/kernel.h`, `linux/platform_device.h`, `linux/netdevice.h`, `linux/can/dev.h`, `c_can.h`.
- Detected declarations: `function c_can_get_ringparam`.
- Atlas domain: Driver Families / drivers/net.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.