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) 2004-2007 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/delay.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"
#include "lpfc_vport.h"

#define LPFC_DEF_DEVLOSS_TMO 30
#define LPFC_MIN_DEVLOSS_TMO 1
#define LPFC_MAX_DEVLOSS_TMO 255

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
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  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;

	return snprintf(buf, PAGE_SIZE, "%s\n",phba->SerialNumber);
}

static ssize_t
lpfc_modeldesc_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;

	return snprintf(buf, PAGE_SIZE, "%s\n",phba->ModelDesc);
}

static ssize_t
lpfc_modelname_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;

	return snprintf(buf, PAGE_SIZE, "%s\n",phba->ModelName);
}

static ssize_t
lpfc_programtype_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;

	return snprintf(buf, PAGE_SIZE, "%s\n",phba->ProgramType);
}

static ssize_t
lpfc_vportnum_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;

	return snprintf(buf, PAGE_SIZE, "%s\n",phba->Port);
}

static ssize_t
lpfc_fwrev_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	char fwrev[32];

	lpfc_decode_firmware_rev(phba, fwrev, 1);
	return snprintf(buf, PAGE_SIZE, "%s, sli-%d\n", fwrev, phba->sli_rev);
}

static ssize_t
lpfc_hdw_show(struct class_device *cdev, char *buf)
{
	char hdw[9];
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	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  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;

	return snprintf(buf, PAGE_SIZE, "%s\n", phba->OptionROMVersion);
}
static ssize_t
lpfc_state_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	int  len = 0;

	switch (phba->link_state) {
	case LPFC_LINK_UNKNOWN:
	case LPFC_WARM_START:
	case LPFC_INIT_START:
	case LPFC_INIT_MBX_CMDS:
	case LPFC_LINK_DOWN:
	case LPFC_HBA_ERROR:
		len += snprintf(buf + len, PAGE_SIZE-len, "Link Down\n");
		break;
	case LPFC_LINK_UP:
	case LPFC_CLEAR_LA:
	case LPFC_HBA_READY:
		len += snprintf(buf + len, PAGE_SIZE-len, "Link Up - \n");

		switch (vport->port_state) {
			len += snprintf(buf + len, PAGE_SIZE-len,
					"initializing\n");
			break;
		case LPFC_LOCAL_CFG_LINK:
			len += snprintf(buf + len, PAGE_SIZE-len,
					"Configuring Link\n");
			break;
		case LPFC_FDISC:
		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:
			len += snprintf(buf + len, PAGE_SIZE - len,
					"Discovery\n");
			break;
		case LPFC_VPORT_READY:
			len += snprintf(buf + len, PAGE_SIZE - len, "Ready\n");
			break;

		case LPFC_VPORT_FAILED:
			len += snprintf(buf + len, PAGE_SIZE - len, "Failed\n");
			break;

		case LPFC_VPORT_UNKNOWN:
			len += snprintf(buf + len, PAGE_SIZE - len,
					"Unknown\n");
			break;
		}

		if (phba->fc_topology == TOPOLOGY_LOOP) {
			if (vport->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 (vport->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  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;

	return snprintf(buf, PAGE_SIZE, "%d\n",
			vport->fc_map_cnt + vport->fc_unmap_cnt);
}


static int
lpfc_issue_lip(struct Scsi_Host *shost)
{
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	LPFC_MBOXQ_t *pmboxq;
	int mbxstatus = MBXERR_ERROR;

	if ((vport->fc_flag & FC_OFFLINE_MODE) ||
	    (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO) ||
	    (vport->port_state != LPFC_VPORT_READY))
		return -EPERM;

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

	if (!pmboxq)
		return -ENOMEM;

	memset((void *)pmboxq, 0, sizeof (LPFC_MBOXQ_t));
	pmboxq->mb.mbxCommand = MBX_DOWN_LINK;
	pmboxq->mb.mbxOwner = OWN_HOST;

	mbxstatus = lpfc_sli_issue_mbox_wait(phba, pmboxq, LPFC_MBOX_TMO * 2);

	if ((mbxstatus == MBX_SUCCESS) && (pmboxq->mb.mbxStatus == 0)) {
		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);
	}

	lpfc_set_loopback_flag(phba);
	if (mbxstatus != MBX_TIMEOUT)
		mempool_free(pmboxq, phba->mbox_mem_pool);

	if (mbxstatus == MBXERR_ERROR)
		return -EIO;

	return 0;
}

static int
lpfc_do_offline(struct lpfc_hba *phba, uint32_t type)
{
	struct completion online_compl;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	int status = 0;
	int cnt = 0;
	int i;

	init_completion(&online_compl);
	lpfc_workq_post_event(phba, &status, &online_compl,
			      LPFC_EVT_OFFLINE_PREP);
	wait_for_completion(&online_compl);

	if (status != 0)
		return -EIO;

	psli = &phba->sli;

	for (i = 0; i < psli->num_rings; i++) {
		pring = &psli->ring[i];
		/* The linkdown event takes 30 seconds to timeout. */
		while (pring->txcmplq_cnt) {
			msleep(10);
			if (cnt++ > 3000) {
				lpfc_printf_log(phba,
					KERN_WARNING, LOG_INIT,
					"0466 Outstanding IO when "
					"bringing Adapter offline\n");
				break;
			}
		}
	}

	init_completion(&online_compl);
	lpfc_workq_post_event(phba, &status, &online_compl, type);
	wait_for_completion(&online_compl);

	if (status != 0)
		return -EIO;

	return 0;
}

static int
lpfc_selective_reset(struct lpfc_hba *phba)
{
	struct completion online_compl;
	int status = 0;

	status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);

	if (status != 0)
		return status;

	init_completion(&online_compl);
	lpfc_workq_post_event(phba, &status, &online_compl,
			      LPFC_EVT_ONLINE);
	wait_for_completion(&online_compl);

	if (status != 0)
		return -EIO;

	return 0;
}

static ssize_t
lpfc_issue_reset(struct class_device *cdev, const char *buf, size_t count)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;

	int status = -EINVAL;

	if (strncmp(buf, "selective", sizeof("selective") - 1) == 0)
		status = lpfc_selective_reset(phba);

	if (status == 0)
		return strlen(buf);
	else
		return status;
}

static ssize_t
lpfc_nport_evt_cnt_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;

	return snprintf(buf, PAGE_SIZE, "%d\n", phba->nport_event_cnt);
}

static ssize_t
lpfc_board_mode_show(struct class_device *cdev, char *buf)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	char  * state;

	if (phba->link_state == LPFC_HBA_ERROR)
		state = "error";
	else if (phba->link_state == LPFC_WARM_START)
		state = "warm start";
	else if (phba->link_state == LPFC_INIT_START)
		state = "offline";
	else
		state = "online";

	return snprintf(buf, PAGE_SIZE, "%s\n", state);
}

static ssize_t
lpfc_board_mode_store(struct class_device *cdev, const char *buf, size_t count)
{
	struct Scsi_Host  *shost = class_to_shost(cdev);
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	struct completion online_compl;
	int status=0;

	init_completion(&online_compl);

	if(strncmp(buf, "online", sizeof("online") - 1) == 0) {
		lpfc_workq_post_event(phba, &status, &online_compl,
				      LPFC_EVT_ONLINE);
		wait_for_completion(&online_compl);
	} else if (strncmp(buf, "offline", sizeof("offline") - 1) == 0)
		status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);
	else if (strncmp(buf, "warm", sizeof("warm") - 1) == 0)
		status = lpfc_do_offline(phba, LPFC_EVT_WARM_START);
	else if (strncmp(buf, "error", sizeof("error") - 1) == 0)
		status = lpfc_do_offline(phba, LPFC_EVT_KILL);
	else
		return -EINVAL;

	if (!status)
		return strlen(buf);
	else
		return -EIO;
}

static int
lpfc_get_hba_info(struct lpfc_hba *phba,
		  uint32_t *mxri, uint32_t *axri,
		  uint32_t *mrpi, uint32_t *arpi,
		  uint32_t *mvpi, uint32_t *avpi)
{
	struct lpfc_sli   *psli = &phba->sli;
	LPFC_MBOXQ_t *pmboxq;
	MAILBOX_t *pmb;
	int rc = 0;

	/*