drivers/nvme/target/trace.c

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

File Facts

System
Linux kernel
Corpus path
drivers/nvme/target/trace.c
Extension
.c
Size
11783 bytes
Lines
442
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 target device driver tracepoints
 * Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
 */

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

static const char *nvmet_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 *nvmet_trace_admin_get_features(struct trace_seq *p,
						 u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);
	u8 fid = cdw10[0];
	u8 sel = cdw10[1] & 0x7;
	u32 cdw11 = get_unaligned_le32(cdw10 + 4);

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

	return ret;
}

static const char *nvmet_trace_get_lba_status(struct trace_seq *p,
					     u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);
	u64 slba = get_unaligned_le64(cdw10);
	u32 mndw = get_unaligned_le32(cdw10 + 8);
	u16 rl = get_unaligned_le16(cdw10 + 12);
	u8 atype = cdw10[15];

	trace_seq_printf(p, "slba=0x%llx, mndw=0x%x, rl=0x%x, atype=%u",
			slba, mndw, rl, atype);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *nvmet_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 *nvmet_trace_read_write(struct trace_seq *p, u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);
	u64 slba = get_unaligned_le64(cdw10);
	u16 length = get_unaligned_le16(cdw10 + 8);
	u16 control = get_unaligned_le16(cdw10 + 10);
	u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
	u32 reftag = get_unaligned_le32(cdw10 +  16);

	trace_seq_printf(p,
			 "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
			 slba, length, control, dsmgmt, reftag);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *nvmet_trace_dsm(struct trace_seq *p, u8 *cdw10)
{
	const char *ret = trace_seq_buffer_ptr(p);

	trace_seq_printf(p, "nr=%u, attributes=%u",
			 get_unaligned_le32(cdw10),
			 get_unaligned_le32(cdw10 + 4));
	trace_seq_putc(p, 0);

Annotation

Implementation Notes