[mirror_ubuntu-artful-kernel.git] / drivers / scsi / scsi_trace.c

/*
 * Copyright (C) 2010 FUJITSU LIMITED
 * Copyright (C) 2010 Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <linux/kernel.h>
#include <linux/trace_seq.h>
#include <trace/events/scsi.h>

#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
#define SERVICE_ACTION32(cdb) ((cdb[8] << 8) | cdb[9])

static const char *
scsi_trace_misc(struct trace_seq *, unsigned char *, int);

static const char *
scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len)
{
	const char *ret = trace_seq_buffer_ptr(p);
	sector_t lba = 0, txlen = 0;

	lba |= ((cdb[1] & 0x1F) << 16);
	lba |=  (cdb[2] << 8);
	lba |=   cdb[3];
	txlen = cdb[4];

	trace_seq_printf(p, "lba=%llu txlen=%llu",
			 (unsigned long long)lba, (unsigned long long)txlen);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *
scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
{
	const char *ret = trace_seq_buffer_ptr(p);
	sector_t lba = 0, txlen = 0;

	lba |= (cdb[2] << 24);
	lba |= (cdb[3] << 16);
	lba |= (cdb[4] << 8);
	lba |=  cdb[5];
	txlen |= (cdb[7] << 8);
	txlen |=  cdb[8];

	trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
			 (unsigned long long)lba, (unsigned long long)txlen,
			 cdb[1] >> 5);

	if (cdb[0] == WRITE_SAME)
		trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);

	trace_seq_putc(p, 0);

	return ret;
}

static const char *
scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len)
{
	const char *ret = trace_seq_buffer_ptr(p);
	sector_t lba = 0, txlen = 0;

	lba |= (cdb[2] << 24);
	lba |= (cdb[3] << 16);
	lba |= (cdb[4] << 8);
	lba |=  cdb[5];
	txlen |= (cdb[6] << 24);
	txlen |= (cdb[7] << 16);
	txlen |= (cdb[8] << 8);
	txlen |=  cdb[9];

	trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
			 (unsigned long long)lba, (unsigned long long)txlen,
			 cdb[1] >> 5);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *
scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
{
	const char *ret = trace_seq_buffer_ptr(p);
	sector_t lba = 0, txlen = 0;

	lba |= ((u64)cdb[2] << 56);
	lba |= ((u64)cdb[3] << 48);
	lba |= ((u64)cdb[4] << 40);
	lba |= ((u64)cdb[5] << 32);
	lba |= (cdb[6] << 24);
	lba |= (cdb[7] << 16);
	lba |= (cdb[8] << 8);
	lba |=  cdb[9];
	txlen |= (cdb[10] << 24);
	txlen |= (cdb[11] << 16);
	txlen |= (cdb[12] << 8);
	txlen |=  cdb[13];

	trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
			 (unsigned long long)lba, (unsigned long long)txlen,
			 cdb[1] >> 5);

	if (cdb[0] == WRITE_SAME_16)
		trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);

	trace_seq_putc(p, 0);

	return ret;
}

static const char *
scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
{
	const char *ret = trace_seq_buffer_ptr(p), *cmd;
	sector_t lba = 0, txlen = 0;
	u32 ei_lbrt = 0;

	switch (SERVICE_ACTION32(cdb)) {
	case READ_32:
		cmd = "READ";
		break;
	case VERIFY_32:
		cmd = "VERIFY";
		break;
	case WRITE_32:
		cmd = "WRITE";
		break;
	case WRITE_SAME_32:
		cmd = "WRITE_SAME";
		break;
	default:
		trace_seq_puts(p, "UNKNOWN");
		goto out;
	}

	lba |= ((u64)cdb[12] << 56);
	lba |= ((u64)cdb[13] << 48);
	lba |= ((u64)cdb[14] << 40);
	lba |= ((u64)cdb[15] << 32);
	lba |= (cdb[16] << 24);
	lba |= (cdb[17] << 16);
	lba |= (cdb[18] << 8);
	lba |=  cdb[19];
	ei_lbrt |= (cdb[20] << 24);
	ei_lbrt |= (cdb[21] << 16);
	ei_lbrt |= (cdb[22] << 8);
	ei_lbrt |=  cdb[23];
	txlen |= (cdb[28] << 24);
	txlen |= (cdb[29] << 16);
	txlen |= (cdb[30] << 8);
	txlen |=  cdb[31];

	trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu protect=%u ei_lbrt=%u",
			 cmd, (unsigned long long)lba,
			 (unsigned long long)txlen, cdb[10] >> 5, ei_lbrt);

	if (SERVICE_ACTION32(cdb) == WRITE_SAME_32)
		trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1);

out:
	trace_seq_putc(p, 0);

	return ret;
}

static const char *
scsi_trace_unmap(struct trace_seq *p, unsigned char *cdb, int len)
{
	const char *ret = trace_seq_buffer_ptr(p);
	unsigned int regions = cdb[7] << 8 | cdb[8];

	trace_seq_printf(p, "regions=%u", (regions - 8) / 16);
	trace_seq_putc(p, 0);

	return ret;
}

static const char *
scsi_trace_service_action_in(struct trace_seq *p, unsigned char *cdb, int len)
{
	const char *ret = trace_seq_buffer_ptr(p), *cmd;
	sector_t lba = 0;
	u32 alloc_len = 0;

	switch (SERVICE_ACTION16(cdb)) {
	case SAI_READ_CAPACITY_16:
		cmd = "READ_CAPACITY_16";
		break;
	case SAI_GET_LBA_STATUS:
		cmd = "GET_LBA_STATUS";
		break;
	default:
		trace_seq_puts(p, "UNKNOWN");
		goto out;
	}

	lba |= ((u64)cdb[2] << 56);
	lba |= ((u64)cdb[3] << 48);
	lba |= ((u64)cdb[4] << 40);
	lba |= ((u64)cdb[5] << 32);
	lba |= (cdb[6] << 24);
	lba |= (cdb[7] << 16);
	lba |= (cdb[8] << 8);
	lba |=  cdb[9];
	alloc_len |= (cdb[10] << 24);
	alloc_len |= (cdb[11] << 16);
	alloc_len |= (cdb[12] << 8);
	alloc_len |=  cdb[13];

	trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd,
			 (unsigned long long)lba, alloc_len);

out:
	trace_seq_putc(p, 0);

	return ret;
}

static const char *
scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
{
	switch (SERVICE_ACTION32(cdb)) {
	case READ_32:
	case VERIFY_32:
	case WRITE_32:
	case WRITE_SAME_32:
		return scsi_trace_rw32(p, cdb, len);
	default:
		return scsi_trace_misc(p, cdb, len);
	}
}

static const char *
scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len)
{
	const char *ret = trace_seq_buffer_ptr(p);

	trace_seq_putc(p, '-');
	trace_seq_putc(p, 0);

	return ret;
}

const char *
scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
{
	switch (cdb[0]) {
	case READ_6:
	case WRITE_6:
		return scsi_trace_rw6(p, cdb, len);
	case READ_10:
	case VERIFY:
	case WRITE_10:
	case WRITE_SAME:
		return scsi_trace_rw10(p, cdb, len);
	case READ_12:
	case VERIFY_12:
	case WRITE_12:
		return scsi_trace_rw12(p, cdb, len);
	case READ_16:
	case VERIFY_16:
	case WRITE_16:
	case WRITE_SAME_16:
		return scsi_trace_rw16(p, cdb, len);
	case UNMAP:
		return scsi_trace_unmap(p, cdb, len);
	case SERVICE_ACTION_IN_16:
		return scsi_trace_service_action_in(p, cdb, len);
	case VARIABLE_LENGTH_CMD:
		return scsi_trace_varlen(p, cdb, len);
	default:
		return scsi_trace_misc(p, cdb, len);
	}
}
Commit	Line	Data
bf816235 KT	1	/*
	2	* Copyright (C) 2010 FUJITSU LIMITED
	3	* Copyright (C) 2010 Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	17	*/
	18	#include <linux/kernel.h>
	19	#include <linux/trace_seq.h>
	20	#include <trace/events/scsi.h>
	21
c446c1f9 MP	22	#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
c446c1f9 MP	23	#define SERVICE_ACTION32(cdb) ((cdb[8] << 8) \| cdb[9])
bf816235 KT	24
	25	static const char *
	26	scsi_trace_misc(struct trace_seq , unsigned char , int);
	27
	28	static const char *
	29	scsi_trace_rw6(struct trace_seq p, unsigned char cdb, int len)
	30	{
7b039cb4	31	const char *ret = trace_seq_buffer_ptr(p);
bf816235 KT	32	sector_t lba = 0, txlen = 0;
	33
	34	lba \|= ((cdb[1] & 0x1F) << 16);
	35	lba \|= (cdb[2] << 8);
	36	lba \|= cdb[3];
	37	txlen = cdb[4];
	38
	39	trace_seq_printf(p, "lba=%llu txlen=%llu",
	40	(unsigned long long)lba, (unsigned long long)txlen);
	41	trace_seq_putc(p, 0);
	42
	43	return ret;
	44	}
	45
	46	static const char *
	47	scsi_trace_rw10(struct trace_seq p, unsigned char cdb, int len)
	48	{
7b039cb4	49	const char *ret = trace_seq_buffer_ptr(p);
bf816235 KT	50	sector_t lba = 0, txlen = 0;
	51
	52	lba \|= (cdb[2] << 24);
	53	lba \|= (cdb[3] << 16);
	54	lba \|= (cdb[4] << 8);
	55	lba \|= cdb[5];
	56	txlen \|= (cdb[7] << 8);
	57	txlen \|= cdb[8];
	58
c446c1f9 MP	59	trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
	60	(unsigned long long)lba, (unsigned long long)txlen,
	61	cdb[1] >> 5);
c498bf1a MP	62
	63	if (cdb[0] == WRITE_SAME)
	64	trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
	65
bf816235 KT	66	trace_seq_putc(p, 0);
	67
	68	return ret;
	69	}
	70
	71	static const char *
	72	scsi_trace_rw12(struct trace_seq p, unsigned char cdb, int len)
	73	{
7b039cb4	74	const char *ret = trace_seq_buffer_ptr(p);
bf816235 KT	75	sector_t lba = 0, txlen = 0;
	76
	77	lba \|= (cdb[2] << 24);
	78	lba \|= (cdb[3] << 16);
	79	lba \|= (cdb[4] << 8);
	80	lba \|= cdb[5];
	81	txlen \|= (cdb[6] << 24);
	82	txlen \|= (cdb[7] << 16);
	83	txlen \|= (cdb[8] << 8);
	84	txlen \|= cdb[9];
	85
c446c1f9 MP	86	trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
	87	(unsigned long long)lba, (unsigned long long)txlen,
	88	cdb[1] >> 5);
bf816235 KT	89	trace_seq_putc(p, 0);
	90
	91	return ret;
	92	}
	93
	94	static const char *
	95	scsi_trace_rw16(struct trace_seq p, unsigned char cdb, int len)
	96	{
7b039cb4	97	const char *ret = trace_seq_buffer_ptr(p);
bf816235 KT	98	sector_t lba = 0, txlen = 0;
	99
	100	lba \|= ((u64)cdb[2] << 56);
	101	lba \|= ((u64)cdb[3] << 48);
	102	lba \|= ((u64)cdb[4] << 40);
	103	lba \|= ((u64)cdb[5] << 32);
	104	lba \|= (cdb[6] << 24);
	105	lba \|= (cdb[7] << 16);
	106	lba \|= (cdb[8] << 8);
	107	lba \|= cdb[9];
	108	txlen \|= (cdb[10] << 24);
	109	txlen \|= (cdb[11] << 16);
	110	txlen \|= (cdb[12] << 8);
	111	txlen \|= cdb[13];
	112
c446c1f9 MP	113	trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
	114	(unsigned long long)lba, (unsigned long long)txlen,
	115	cdb[1] >> 5);
	116
	117	if (cdb[0] == WRITE_SAME_16)
	118	trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
	119
bf816235 KT	120	trace_seq_putc(p, 0);
	121
	122	return ret;
	123	}
	124
	125	static const char *
	126	scsi_trace_rw32(struct trace_seq p, unsigned char cdb, int len)
	127	{
7b039cb4	128	const char ret = trace_seq_buffer_ptr(p), cmd;
bf816235	129	sector_t lba = 0, txlen = 0;
c446c1f9 MP	130	u32 ei_lbrt = 0;
	131
	132	switch (SERVICE_ACTION32(cdb)) {
	133	case READ_32:
	134	cmd = "READ";
	135	break;
	136	case VERIFY_32:
	137	cmd = "VERIFY";
	138	break;
	139	case WRITE_32:
	140	cmd = "WRITE";
	141	break;
	142	case WRITE_SAME_32:
	143	cmd = "WRITE_SAME";
	144	break;
	145	default:
91c40f24	146	trace_seq_puts(p, "UNKNOWN");
c446c1f9 MP	147	goto out;
c446c1f9 MP	148	}
bf816235 KT	149
	150	lba \|= ((u64)cdb[12] << 56);
	151	lba \|= ((u64)cdb[13] << 48);
	152	lba \|= ((u64)cdb[14] << 40);
	153	lba \|= ((u64)cdb[15] << 32);
	154	lba \|= (cdb[16] << 24);
	155	lba \|= (cdb[17] << 16);
	156	lba \|= (cdb[18] << 8);
	157	lba \|= cdb[19];
c446c1f9 MP	158	ei_lbrt \|= (cdb[20] << 24);
	159	ei_lbrt \|= (cdb[21] << 16);
	160	ei_lbrt \|= (cdb[22] << 8);
	161	ei_lbrt \|= cdb[23];
bf816235 KT	162	txlen \|= (cdb[28] << 24);
	163	txlen \|= (cdb[29] << 16);
	164	txlen \|= (cdb[30] << 8);
	165	txlen \|= cdb[31];
	166
c446c1f9 MP	167	trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu protect=%u ei_lbrt=%u",
	168	cmd, (unsigned long long)lba,
	169	(unsigned long long)txlen, cdb[10] >> 5, ei_lbrt);
	170
	171	if (SERVICE_ACTION32(cdb) == WRITE_SAME_32)
	172	trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1);
	173
	174	out:
	175	trace_seq_putc(p, 0);
	176
	177	return ret;
	178	}
	179
	180	static const char *
	181	scsi_trace_unmap(struct trace_seq p, unsigned char cdb, int len)
	182	{
7b039cb4	183	const char *ret = trace_seq_buffer_ptr(p);
c446c1f9 MP	184	unsigned int regions = cdb[7] << 8 \| cdb[8];
	185
	186	trace_seq_printf(p, "regions=%u", (regions - 8) / 16);
	187	trace_seq_putc(p, 0);
	188
	189	return ret;
	190	}
	191
	192	static const char *
	193	scsi_trace_service_action_in(struct trace_seq p, unsigned char cdb, int len)
	194	{
7b039cb4	195	const char ret = trace_seq_buffer_ptr(p), cmd;
c446c1f9 MP	196	sector_t lba = 0;
	197	u32 alloc_len = 0;
	198
	199	switch (SERVICE_ACTION16(cdb)) {
	200	case SAI_READ_CAPACITY_16:
	201	cmd = "READ_CAPACITY_16";
	202	break;
	203	case SAI_GET_LBA_STATUS:
	204	cmd = "GET_LBA_STATUS";
	205	break;
	206	default:
91c40f24	207	trace_seq_puts(p, "UNKNOWN");
c446c1f9 MP	208	goto out;
	209	}
	210
	211	lba \|= ((u64)cdb[2] << 56);
	212	lba \|= ((u64)cdb[3] << 48);
	213	lba \|= ((u64)cdb[4] << 40);
	214	lba \|= ((u64)cdb[5] << 32);
	215	lba \|= (cdb[6] << 24);
	216	lba \|= (cdb[7] << 16);
	217	lba \|= (cdb[8] << 8);
	218	lba \|= cdb[9];
	219	alloc_len \|= (cdb[10] << 24);
	220	alloc_len \|= (cdb[11] << 16);
	221	alloc_len \|= (cdb[12] << 8);
	222	alloc_len \|= cdb[13];
	223
	224	trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd,
	225	(unsigned long long)lba, alloc_len);
bf816235	226
c446c1f9	227	out:
bf816235 KT	228	trace_seq_putc(p, 0);
	229
	230	return ret;
	231	}
	232
	233	static const char *
	234	scsi_trace_varlen(struct trace_seq p, unsigned char cdb, int len)
	235	{
c446c1f9	236	switch (SERVICE_ACTION32(cdb)) {
bf816235	237	case READ_32:
c446c1f9	238	case VERIFY_32:
bf816235	239	case WRITE_32:
c446c1f9	240	case WRITE_SAME_32:
bf816235 KT	241	return scsi_trace_rw32(p, cdb, len);
	242	default:
	243	return scsi_trace_misc(p, cdb, len);
	244	}
	245	}
	246
	247	static const char *
	248	scsi_trace_misc(struct trace_seq p, unsigned char cdb, int len)
	249	{
7b039cb4	250	const char *ret = trace_seq_buffer_ptr(p);
bf816235	251
f50332ff	252	trace_seq_putc(p, '-');
bf816235 KT	253	trace_seq_putc(p, 0);
	254
	255	return ret;
	256	}
	257
	258	const char *
	259	scsi_trace_parse_cdb(struct trace_seq p, unsigned char cdb, int len)
	260	{
	261	switch (cdb[0]) {
	262	case READ_6:
	263	case WRITE_6:
	264	return scsi_trace_rw6(p, cdb, len);
	265	case READ_10:
c446c1f9	266	case VERIFY:
bf816235	267	case WRITE_10:
c446c1f9	268	case WRITE_SAME:
bf816235 KT	269	return scsi_trace_rw10(p, cdb, len);
bf816235 KT	270	case READ_12:
c446c1f9	271	case VERIFY_12:
bf816235 KT	272	case WRITE_12:
	273	return scsi_trace_rw12(p, cdb, len);
	274	case READ_16:
c446c1f9	275	case VERIFY_16:
bf816235	276	case WRITE_16:
c446c1f9	277	case WRITE_SAME_16:
bf816235	278	return scsi_trace_rw16(p, cdb, len);
c446c1f9 MP	279	case UNMAP:
c446c1f9 MP	280	return scsi_trace_unmap(p, cdb, len);
eb846d9f	281	case SERVICE_ACTION_IN_16:
c446c1f9	282	return scsi_trace_service_action_in(p, cdb, len);
bf816235 KT	283	case VARIABLE_LENGTH_CMD:
	284	return scsi_trace_varlen(p, cdb, len);
	285	default:
	286	return scsi_trace_misc(p, cdb, len);
	287	}
	288	}