drivers/scsi/qedi/qedi_sysfs.c

Source file repositories/reference/linux-study-clean/drivers/scsi/qedi/qedi_sysfs.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/qedi/qedi_sysfs.c
Extension
.c
Size
1295 bytes
Lines
59
Domain
Driver Families
Bucket
drivers/scsi
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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * QLogic iSCSI Offload Driver
 * Copyright (c) 2016 Cavium Inc.
 */

#include "qedi.h"
#include "qedi_gbl.h"
#include "qedi_iscsi.h"
#include "qedi_dbg.h"

static inline struct qedi_ctx *qedi_dev_to_hba(struct device *dev)
{
	struct Scsi_Host *shost = class_to_shost(dev);

	return iscsi_host_priv(shost);
}

static ssize_t port_state_show(struct device *dev,
			       struct device_attribute *attr,
			       char *buf)
{
	struct qedi_ctx *qedi = qedi_dev_to_hba(dev);

	if (atomic_read(&qedi->link_state) == QEDI_LINK_UP)
		return sprintf(buf, "Online\n");
	else
		return sprintf(buf, "Linkdown\n");
}

static ssize_t speed_show(struct device *dev,
			  struct device_attribute *attr, char *buf)
{
	struct qedi_ctx *qedi = qedi_dev_to_hba(dev);
	struct qed_link_output if_link;

	qedi_ops->common->get_link(qedi->cdev, &if_link);

	return sprintf(buf, "%d Gbit\n", if_link.speed / 1000);
}

static DEVICE_ATTR_RO(port_state);
static DEVICE_ATTR_RO(speed);

static struct attribute *qedi_shost_attrs[] = {
	&dev_attr_port_state.attr,
	&dev_attr_speed.attr,
	NULL
};

static const struct attribute_group qedi_shost_attr_group = {
	.attrs = qedi_shost_attrs
};

const struct attribute_group *qedi_shost_groups[] = {
	&qedi_shost_attr_group,
	NULL
};

Annotation

Implementation Notes