[ceph.git] / ceph / src / spdk / lib / scsi / scsi.c

/*-
 *   BSD LICENSE
 *
 *   Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
 *   Copyright (c) Intel Corporation.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "scsi_internal.h"

struct spdk_scsi_globals g_scsi;

int
spdk_scsi_init(void)
{
	int rc;

	rc = pthread_mutex_init(&g_scsi.mutex, NULL);
	if (rc != 0) {
		SPDK_ERRLOG("mutex_init() failed\n");
		return -1;
	}

	return 0;
}

void
spdk_scsi_fini(void)
{
	pthread_mutex_destroy(&g_scsi.mutex);
}

SPDK_TRACE_REGISTER_FN(scsi_trace, "scsi", TRACE_GROUP_SCSI)
{
	spdk_trace_register_owner(OWNER_SCSI_DEV, 'd');
	spdk_trace_register_object(OBJECT_SCSI_TASK, 't');
	spdk_trace_register_description("SCSI_TASK_DONE", TRACE_SCSI_TASK_DONE,
					OWNER_SCSI_DEV, OBJECT_SCSI_TASK, 0, 0, "");
	spdk_trace_register_description("SCSI_TASK_START", TRACE_SCSI_TASK_START,
					OWNER_SCSI_DEV, OBJECT_SCSI_TASK, 0, 0, "");
}

uint64_t
spdk_scsi_lun_id_int_to_fmt(int lun_id)
{
	uint64_t fmt_lun, method;

	if (SPDK_SCSI_DEV_MAX_LUN <= 0x0100) {
		/* below 256 */
		method = 0x00U;
		fmt_lun = (method & 0x03U) << 62;
		fmt_lun |= ((uint64_t)lun_id & 0x00ffU) << 48;
	} else if (SPDK_SCSI_DEV_MAX_LUN <= 0x4000) {
		/* below 16384 */
		method = 0x01U;
		fmt_lun = (method & 0x03U) << 62;
		fmt_lun |= ((uint64_t)lun_id & 0x3fffU) << 48;
	} else {
		/* XXX */
		fmt_lun = 0;
	}

	return fmt_lun;
}

int
spdk_scsi_lun_id_fmt_to_int(uint64_t fmt_lun)
{
	uint64_t method;
	int lun_i;

	method = (fmt_lun >> 62) & 0x03U;
	fmt_lun = fmt_lun >> 48;
	if (method == 0x00U) {
		lun_i = (int)(fmt_lun & 0x00ffU);
	} else if (method == 0x01U) {
		lun_i = (int)(fmt_lun & 0x3fffU);
	} else {
		lun_i = 0xffffU;
	}
	return lun_i;
}

SPDK_LOG_REGISTER_COMPONENT("scsi", SPDK_LOG_SCSI)
Commit	Line	Data
7c673cae FG	1	/*-
	2	* BSD LICENSE
	3	*
	4	* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
	5	* Copyright (c) Intel Corporation.
	6	* All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* * Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	* * Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in
	16	* the documentation and/or other materials provided with the
	17	* distribution.
	18	* * Neither the name of Intel Corporation nor the names of its
	19	* contributors may be used to endorse or promote products derived
	20	* from this software without specific prior written permission.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	23	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	24	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	25	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	26	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	27	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	28	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	29	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	30	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	31	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	32	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	33	*/
	34
	35	#include "scsi_internal.h"
	36
f67539c2	37	struct spdk_scsi_globals g_scsi;
7c673cae	38
11fdf7f2 TL	39	int
11fdf7f2 TL	40	spdk_scsi_init(void)
7c673cae FG	41	{
	42	int rc;
	43
f67539c2	44	rc = pthread_mutex_init(&g_scsi.mutex, NULL);
7c673cae FG	45	if (rc != 0) {
	46	SPDK_ERRLOG("mutex_init() failed\n");
	47	return -1;
	48	}
	49
11fdf7f2	50	return 0;
7c673cae FG	51	}
7c673cae FG	52
11fdf7f2 TL	53	void
11fdf7f2 TL	54	spdk_scsi_fini(void)
7c673cae	55	{
f67539c2	56	pthread_mutex_destroy(&g_scsi.mutex);
7c673cae FG	57	}
7c673cae FG	58
9f95a23c	59	SPDK_TRACE_REGISTER_FN(scsi_trace, "scsi", TRACE_GROUP_SCSI)
7c673cae FG	60	{
	61	spdk_trace_register_owner(OWNER_SCSI_DEV, 'd');
	62	spdk_trace_register_object(OBJECT_SCSI_TASK, 't');
9f95a23c	63	spdk_trace_register_description("SCSI_TASK_DONE", TRACE_SCSI_TASK_DONE,
11fdf7f2	64	OWNER_SCSI_DEV, OBJECT_SCSI_TASK, 0, 0, "");
9f95a23c	65	spdk_trace_register_description("SCSI_TASK_START", TRACE_SCSI_TASK_START,
11fdf7f2	66	OWNER_SCSI_DEV, OBJECT_SCSI_TASK, 0, 0, "");
7c673cae FG	67	}
7c673cae FG	68
9f95a23c TL	69	uint64_t
	70	spdk_scsi_lun_id_int_to_fmt(int lun_id)
	71	{
	72	uint64_t fmt_lun, method;
	73
	74	if (SPDK_SCSI_DEV_MAX_LUN <= 0x0100) {
	75	/* below 256 */
	76	method = 0x00U;
	77	fmt_lun = (method & 0x03U) << 62;
	78	fmt_lun \|= ((uint64_t)lun_id & 0x00ffU) << 48;
	79	} else if (SPDK_SCSI_DEV_MAX_LUN <= 0x4000) {
	80	/* below 16384 */
	81	method = 0x01U;
	82	fmt_lun = (method & 0x03U) << 62;
	83	fmt_lun \|= ((uint64_t)lun_id & 0x3fffU) << 48;
	84	} else {
	85	/* XXX */
	86	fmt_lun = 0;
	87	}
	88
	89	return fmt_lun;
	90	}
	91
	92	int
	93	spdk_scsi_lun_id_fmt_to_int(uint64_t fmt_lun)
	94	{
	95	uint64_t method;
	96	int lun_i;
	97
	98	method = (fmt_lun >> 62) & 0x03U;
	99	fmt_lun = fmt_lun >> 48;
	100	if (method == 0x00U) {
	101	lun_i = (int)(fmt_lun & 0x00ffU);
	102	} else if (method == 0x01U) {
	103	lun_i = (int)(fmt_lun & 0x3fffU);
	104	} else {
	105	lun_i = 0xffffU;
	106	}
	107	return lun_i;
	108	}
	109
11fdf7f2	110	SPDK_LOG_REGISTER_COMPONENT("scsi", SPDK_LOG_SCSI)