drivers/nvme/host/trace.c

Source file repositories/reference/linux-study-clean/drivers/nvme/host/trace.c

File Facts

System
Linux kernel
Corpus path
drivers/nvme/host/trace.c
Extension
.c
Size
13313 bytes
Lines
501
Domain
Representative Device Path
Bucket
PCIe NVMe Storage Path
Inferred role
Representative Device Path: implementation source
Status
source implementation candidate

Why This File Exists

Part of the selected hardware vertical slice: PCI discovery, driver binding, NVMe queues, block requests, DMA, interrupts, and completion.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * NVM Express device driver tracepoints
 * Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
 */

#include <linux/unaligned.h>
#include "trace.h"

static const char *nvme_trace_delete_sq(struct trace_seq *p, u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);
	u16 sqid = get_unaligned_le16(cdw10);

	trace_seq_printf(p, "sqid=%u", sqid);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *nvme_trace_create_sq(struct trace_seq *p, u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);
	u16 sqid = get_unaligned_le16(cdw10);
	u16 qsize = get_unaligned_le16(cdw10 + 2);
	u16 sq_flags = get_unaligned_le16(cdw10 + 4);
	u16 cqid = get_unaligned_le16(cdw10 + 6);


	trace_seq_printf(p, "sqid=%u, qsize=%u, sq_flags=0x%x, cqid=%u",
			 sqid, qsize, sq_flags, cqid);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *nvme_trace_delete_cq(struct trace_seq *p, u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);
	u16 cqid = get_unaligned_le16(cdw10);

	trace_seq_printf(p, "cqid=%u", cqid);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *nvme_trace_create_cq(struct trace_seq *p, u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);
	u16 cqid = get_unaligned_le16(cdw10);
	u16 qsize = get_unaligned_le16(cdw10 + 2);
	u16 cq_flags = get_unaligned_le16(cdw10 + 4);
	u16 irq_vector = get_unaligned_le16(cdw10 + 6);

	trace_seq_printf(p, "cqid=%u, qsize=%u, cq_flags=0x%x, irq_vector=%u",
			 cqid, qsize, cq_flags, irq_vector);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *nvme_trace_admin_identify(struct trace_seq *p, u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);
	u8 cns = cdw10[0];
	u16 ctrlid = get_unaligned_le16(cdw10 + 2);

	trace_seq_printf(p, "cns=%u, ctrlid=%u", cns, ctrlid);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *nvme_trace_admin_set_features(struct trace_seq *p,
						 u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);
	u8 fid = cdw10[0];
	u8 sv = cdw10[3] & 0x8;
	u32 cdw11 = get_unaligned_le32(cdw10 + 4);

	trace_seq_printf(p, "fid=0x%x, sv=0x%x, cdw11=0x%x", fid, sv, cdw11);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *nvme_trace_admin_get_features(struct trace_seq *p,
						 u8 *cdw10)

Annotation

Implementation Notes