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/*
* NVM Express device driver tracepoints
* Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include <asm/unaligned.h>
#include "trace.h"
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_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_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 *nvme_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);
return ret;
}
static const char *nvme_trace_common(struct trace_seq *p, u8 *cdw10)
{
const char *ret = trace_seq_buffer_ptr(p);
trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
trace_seq_putc(p, 0);
return ret;
}
const char *nvme_trace_parse_admin_cmd(struct trace_seq *p,
u8 opcode, u8 *cdw10)
{
switch (opcode) {
case nvme_admin_create_sq:
return nvme_trace_create_sq(p, cdw10);
case nvme_admin_create_cq:
return nvme_trace_create_cq(p, cdw10);
case nvme_admin_identify:
return nvme_trace_admin_identify(p, cdw10);
default:
return nvme_trace_common(p, cdw10);
}
}
const char *nvme_trace_parse_nvm_cmd(struct trace_seq *p,
u8 opcode, u8 *cdw10)
{
switch (opcode) {
case nvme_cmd_read:
case nvme_cmd_write:
case nvme_cmd_write_zeroes:
return nvme_trace_read_write(p, cdw10);
case nvme_cmd_dsm:
return nvme_trace_dsm(p, cdw10);
default:
return nvme_trace_common(p, cdw10);
}
}
const char *nvme_trace_disk_name(struct trace_seq *p, char *name)
{
const char *ret = trace_seq_buffer_ptr(p);
if (*name)
trace_seq_printf(p, "disk=%s, ", name);
trace_seq_putc(p, 0);
return ret;
}
EXPORT_SYMBOL_GPL(nvme_trace_disk_name);
EXPORT_TRACEPOINT_SYMBOL_GPL(nvme_sq);
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