lpfc_attr.c

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/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2005 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

#include <linux/ctype.h>
#include <linux/pci.h>
#include <linux/interrupt.h>

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>

#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_version.h"
#include "lpfc_compat.h"
#include "lpfc_crtn.h"


static void
lpfc_jedec_to_ascii(int incr, char hdw[])
{
	int i, j;
	for (i = 0; i < 8; i++) {
		j = (incr & 0xf);
		if (j <= 9)
			hdw[7 - i] = 0x30 +  j;
		 else
			hdw[7 - i] = 0x61 + j - 10;
		incr = (incr >> 4);
	}
	hdw[8] = 0;
	return;
}

static ssize_t
lpfc_drvr_version_show(struct class_device *cdev, char *buf)
{
	return snprintf(buf, PAGE_SIZE, LPFC_MODULE_DESC "\n");
}

static ssize_t
management_version_show(struct class_device *cdev, char *buf)
{
	return snprintf(buf, PAGE_SIZE, DFC_API_VERSION "\n");
}

static ssize_t
lpfc_info_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	return snprintf(buf, PAGE_SIZE, "%s\n",lpfc_info(host));
}

static ssize_t
lpfc_serialnum_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	return snprintf(buf, PAGE_SIZE, "%s\n",phba->SerialNumber);
}

static ssize_t
lpfc_modeldesc_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	return snprintf(buf, PAGE_SIZE, "%s\n",phba->ModelDesc);
}

static ssize_t
lpfc_modelname_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	return snprintf(buf, PAGE_SIZE, "%s\n",phba->ModelName);
}

static ssize_t
lpfc_programtype_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	return snprintf(buf, PAGE_SIZE, "%s\n",phba->ProgramType);
}

static ssize_t
lpfc_portnum_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	return snprintf(buf, PAGE_SIZE, "%s\n",phba->Port);
}

static ssize_t
lpfc_fwrev_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	char fwrev[32];
	lpfc_decode_firmware_rev(phba, fwrev, 1);
	return snprintf(buf, PAGE_SIZE, "%s\n",fwrev);
}

static ssize_t
lpfc_hdw_show(struct class_device *cdev, char *buf)
{
	char hdw[9];
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	lpfc_vpd_t *vp = &phba->vpd;
	lpfc_jedec_to_ascii(vp->rev.biuRev, hdw);
	return snprintf(buf, PAGE_SIZE, "%s\n", hdw);
}
static ssize_t
lpfc_option_rom_version_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	return snprintf(buf, PAGE_SIZE, "%s\n", phba->OptionROMVersion);
}
static ssize_t
lpfc_state_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	int len = 0;
	switch (phba->hba_state) {
	case LPFC_INIT_START:
	case LPFC_INIT_MBX_CMDS:
	case LPFC_LINK_DOWN:
		len += snprintf(buf + len, PAGE_SIZE-len, "Link Down\n");
		break;
	case LPFC_LINK_UP:
	case LPFC_LOCAL_CFG_LINK:
		len += snprintf(buf + len, PAGE_SIZE-len, "Link Up\n");
		break;
	case LPFC_FLOGI:
	case LPFC_FABRIC_CFG_LINK:
	case LPFC_NS_REG:
	case LPFC_NS_QRY:
	case LPFC_BUILD_DISC_LIST:
	case LPFC_DISC_AUTH:
	case LPFC_CLEAR_LA:
		len += snprintf(buf + len, PAGE_SIZE-len,
				"Link Up - Discovery\n");
		break;
	case LPFC_HBA_READY:
		len += snprintf(buf + len, PAGE_SIZE-len,
				"Link Up - Ready:\n");
		if (phba->fc_topology == TOPOLOGY_LOOP) {
			if (phba->fc_flag & FC_PUBLIC_LOOP)
				len += snprintf(buf + len, PAGE_SIZE-len,
						"   Public Loop\n");
			else
				len += snprintf(buf + len, PAGE_SIZE-len,
						"   Private Loop\n");
		} else {
			if (phba->fc_flag & FC_FABRIC)
				len += snprintf(buf + len, PAGE_SIZE-len,
						"   Fabric\n");
			else
				len += snprintf(buf + len, PAGE_SIZE-len,
						"   Point-2-Point\n");
		}
	}
	return len;
}

static ssize_t
lpfc_num_discovered_ports_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	return snprintf(buf, PAGE_SIZE, "%d\n", phba->fc_map_cnt +
							phba->fc_unmap_cnt);
}


static ssize_t
lpfc_issue_lip (struct class_device *cdev, const char *buf, size_t count)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata[0];
	int val = 0;
	LPFC_MBOXQ_t *pmboxq;
	int mbxstatus = MBXERR_ERROR;

	if ((sscanf(buf, "%d", &val) != 1) ||
	    (val != 1))
		return -EINVAL;

	if ((phba->fc_flag & FC_OFFLINE_MODE) ||
	    (phba->hba_state != LPFC_HBA_READY))
		return -EPERM;

	pmboxq = mempool_alloc(phba->mbox_mem_pool,GFP_KERNEL);

	if (!pmboxq)
		return -ENOMEM;

	memset((void *)pmboxq, 0, sizeof (LPFC_MBOXQ_t));
	lpfc_init_link(phba, pmboxq, phba->cfg_topology, phba->cfg_link_speed);
	mbxstatus = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);

	if (mbxstatus == MBX_TIMEOUT)
		pmboxq->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
	else
		mempool_free( pmboxq, phba->mbox_mem_pool);

	if (mbxstatus == MBXERR_ERROR)
		return -EIO;

	return strlen(buf);
}

static ssize_t
lpfc_nport_evt_cnt_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	return snprintf(buf, PAGE_SIZE, "%d\n", phba->nport_event_cnt);
}

static ssize_t
lpfc_board_online_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];

	if (!phba) return 0;

	if (phba->fc_flag & FC_OFFLINE_MODE)
		return snprintf(buf, PAGE_SIZE, "0\n");
	else
		return snprintf(buf, PAGE_SIZE, "1\n");
}

static ssize_t
lpfc_board_online_store(struct class_device *cdev, const char *buf,
								size_t count)
{
	struct Scsi_Host *host = class_to_shost(cdev);
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];
	struct completion online_compl;
	int val=0, status=0;

	if (sscanf(buf, "%d", &val) != 1)
		return 0;

	init_completion(&online_compl);

	if (val)
		lpfc_workq_post_event(phba, &status, &online_compl,
							LPFC_EVT_ONLINE);
	else
		lpfc_workq_post_event(phba, &status, &online_compl,
							LPFC_EVT_OFFLINE);
	wait_for_completion(&online_compl);
	if (!status)
		return strlen(buf);
	else
		return 0;
}


#define lpfc_param_show(attr)	\
static ssize_t \
lpfc_##attr##_show(struct class_device *cdev, char *buf) \
{ \
	struct Scsi_Host *host = class_to_shost(cdev);\
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];\
	int val = 0;\
	if (phba){\
		val = phba->cfg_##attr;\
		return snprintf(buf, PAGE_SIZE, "%d\n",\
				phba->cfg_##attr);\
	}\
	return 0;\
}

#define lpfc_param_store(attr, minval, maxval)	\
static ssize_t \
lpfc_##attr##_store(struct class_device *cdev, const char *buf, size_t count) \
{ \
	struct Scsi_Host *host = class_to_shost(cdev);\
	struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0];\
	int val = 0;\
	if (!isdigit(buf[0]))\
		return -EINVAL;\
	if (sscanf(buf, "0x%x", &val) != 1)\
		if (sscanf(buf, "%d", &val) != 1)\
			return -EINVAL;\
	if (phba){\
		if (val >= minval && val <= maxval) {\
			phba->cfg_##attr = val;\
			return strlen(buf);\
		}\
	}\
	return 0;\
}

#define LPFC_ATTR_R_NOINIT(name, desc) \
extern int lpfc_##name;\
module_param(lpfc_##name, int, 0);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_param_show(name)\
static CLASS_DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)

#define LPFC_ATTR_R(name, defval, minval, maxval, desc) \
static int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_param_show(name)\
static CLASS_DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)

#define LPFC_ATTR_RW(name, defval, minval, maxval, desc) \
static int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_param_show(name)\
lpfc_param_store(name, minval, maxval)\
static CLASS_DEVICE_ATTR(lpfc_##name, S_IRUGO | S_IWUSR,\
			 lpfc_##name##_show, lpfc_##name##_store)

static CLASS_DEVICE_ATTR(info, S_IRUGO, lpfc_info_show, NULL);
static CLASS_DEVICE_ATTR(serialnum, S_IRUGO, lpfc_serialnum_show, NULL);
static CLASS_DEVICE_ATTR(modeldesc, S_IRUGO, lpfc_modeldesc_show, NULL);
static CLASS_DEVICE_ATTR(modelname, S_IRUGO, lpfc_modelname_show, NULL);
static CLASS_DEVICE_ATTR(programtype, S_IRUGO, lpfc_programtype_show, NULL);
static CLASS_DEVICE_ATTR(portnum, S_IRUGO, lpfc_portnum_show, NULL);
static CLASS_DEVICE_ATTR(fwrev, S_IRUGO, lpfc_fwrev_show, NULL);
static CLASS_DEVICE_ATTR(hdw, S_IRUGO, lpfc_hdw_show, NULL);
static CLASS_DEVICE_ATTR(state, S_IRUGO, lpfc_state_show, NULL);
static CLASS_DEVICE_ATTR(option_rom_version, S_IRUGO,
					lpfc_option_rom_version_show, NULL);
static CLASS_DEVICE_ATTR(num_discovered_ports, S_IRUGO,
					lpfc_num_discovered_ports_show, NULL);
static CLASS_DEVICE_ATTR(nport_evt_cnt, S_IRUGO, lpfc_nport_evt_cnt_show, NULL);
static CLASS_DEVICE_ATTR(lpfc_drvr_version, S_IRUGO, lpfc_drvr_version_show,
			 NULL);
static CLASS_DEVICE_ATTR(management_version, S_IRUGO, management_version_show,
			 NULL);
static CLASS_DEVICE_ATTR(issue_lip, S_IWUSR, NULL, lpfc_issue_lip);
static CLASS_DEVICE_ATTR(board_online, S_IRUGO | S_IWUSR,
			 lpfc_board_online_show, lpfc_board_online_store);


/*
# lpfc_log_verbose: Only turn this flag on if you are willing to risk being
# deluged with LOTS of information.
# You can set a bit mask to record specific types of verbose messages:
#
# LOG_ELS                       0x1        ELS events
# LOG_DISCOVERY                 0x2        Link discovery events
# LOG_MBOX                      0x4        Mailbox events
# LOG_INIT                      0x8        Initialization events
# LOG_LINK_EVENT                0x10       Link events
# LOG_IP                        0x20       IP traffic history
# LOG_FCP                       0x40       FCP traffic history
# LOG_NODE                      0x80       Node table events
# LOG_MISC                      0x400      Miscellaneous events
# LOG_SLI                       0x800      SLI events
# LOG_CHK_COND                  0x1000     FCP Check condition flag
# LOG_LIBDFC                    0x2000     LIBDFC events
# LOG_ALL_MSG                   0xffff     LOG all messages
*/
LPFC_ATTR_RW(log_verbose, 0x0, 0x0, 0xffff, "Verbose logging bit-mask");

/*
# lun_queue_depth:  This parameter is used to limit the number of outstanding
# commands per FCP LUN. Value range is [1,128]. Default value is 30.
*/
LPFC_ATTR_R(lun_queue_depth, 30, 1, 128,
	    "Max number of FCP commands we can queue to a specific LUN");

/*
# Some disk devices have a "select ID" or "select Target" capability.
# From a protocol standpoint "select ID" usually means select the
# Fibre channel "ALPA".  In the FC-AL Profile there is an "informative
# annex" which contains a table that maps a "select ID" (a number
# between 0 and 7F) to an ALPA.  By default, for compatibility with
# older drivers, the lpfc driver scans this table from low ALPA to high
# ALPA.
#
# Turning on the scan-down variable (on  = 1, off = 0) will
# cause the lpfc driver to use an inverted table, effectively
# scanning ALPAs from high to low. Value range is [0,1]. Default value is 1.
#
# (Note: This "select ID" functionality is a LOOP ONLY characteristic
# and will not work across a fabric. Also this parameter will take
# effect only in the case when ALPA map is not available.)
*/
LPFC_ATTR_R(scan_down, 1, 0, 1,
	     "Start scanning for devices from highest ALPA to lowest");

/*
# lpfc_nodev_tmo: If set, it will hold all I/O errors on devices that disappear
# until the timer expires. Value range is [0,255]. Default value is 20.
# NOTE: this MUST be less then the SCSI Layer command timeout - 1.
*/
LPFC_ATTR_RW(nodev_tmo, 30, 0, 255,
	     "Seconds driver will hold I/O waiting for a device to come back");

/*
# lpfc_topology:  link topology for init link
#            0x0  = attempt loop mode then point-to-point