lpfc_init.c

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/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2006 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/blkdev.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/idr.h>
#include <linux/interrupt.h>
#include <linux/kthread.h>
#include <linux/pci.h>
#include <linux/spinlock.h>

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.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_crtn.h"
#include "lpfc_version.h"

static int lpfc_parse_vpd(struct lpfc_hba *, uint8_t *, int);
static void lpfc_get_hba_model_desc(struct lpfc_hba *, uint8_t *, uint8_t *);
static int lpfc_post_rcv_buf(struct lpfc_hba *);

static struct scsi_transport_template *lpfc_transport_template = NULL;
static DEFINE_IDR(lpfc_hba_index);

/************************************************************************/
/*                                                                      */
/*    lpfc_config_port_prep                                             */
/*    This routine will do LPFC initialization prior to the             */
/*    CONFIG_PORT mailbox command. This will be initialized             */
/*    as a SLI layer callback routine.                                  */
/*    This routine returns 0 on success or -ERESTART if it wants        */
/*    the SLI layer to reset the HBA and try again. Any                 */
/*    other return value indicates an error.                            */
/*                                                                      */
/************************************************************************/
int
lpfc_config_port_prep(struct lpfc_hba * phba)
{
	lpfc_vpd_t *vp = &phba->vpd;
	int i = 0, rc;
	LPFC_MBOXQ_t *pmb;
	MAILBOX_t *mb;
	char *lpfc_vpd_data = NULL;
	uint16_t offset = 0;
	static char licensed[56] =
		    "key unlock for use with gnu public licensed code only\0";

	pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
	if (!pmb) {
		phba->hba_state = LPFC_HBA_ERROR;
		return -ENOMEM;
	}

	mb = &pmb->mb;
	phba->hba_state = LPFC_INIT_MBX_CMDS;

	if (lpfc_is_LC_HBA(phba->pcidev->device)) {
		uint32_t *ptext = (uint32_t *) licensed;

		for (i = 0; i < 56; i += sizeof (uint32_t), ptext++)
			*ptext = cpu_to_be32(*ptext);

		lpfc_read_nv(phba, pmb);
		memset((char*)mb->un.varRDnvp.rsvd3, 0,
			sizeof (mb->un.varRDnvp.rsvd3));
		memcpy((char*)mb->un.varRDnvp.rsvd3, licensed,
			 sizeof (licensed));

		rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);

		if (rc != MBX_SUCCESS) {
			lpfc_printf_log(phba,
					KERN_ERR,
					LOG_MBOX,
					"%d:0324 Config Port initialization "
					"error, mbxCmd x%x READ_NVPARM, "
					"mbxStatus x%x\n",
					phba->brd_no,
					mb->mbxCommand, mb->mbxStatus);
			mempool_free(pmb, phba->mbox_mem_pool);
			return -ERESTART;
		}
		memcpy(phba->wwnn, (char *)mb->un.varRDnvp.nodename,
		       sizeof (mb->un.varRDnvp.nodename));
	}

	/* Setup and issue mailbox READ REV command */
	lpfc_read_rev(phba, pmb);
	rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
	if (rc != MBX_SUCCESS) {
		lpfc_printf_log(phba,
				KERN_ERR,
				LOG_INIT,
				"%d:0439 Adapter failed to init, mbxCmd x%x "
				"READ_REV, mbxStatus x%x\n",
				phba->brd_no,
				mb->mbxCommand, mb->mbxStatus);
		mempool_free( pmb, phba->mbox_mem_pool);
		return -ERESTART;
	}

	/*
	 * The value of rr must be 1 since the driver set the cv field to 1.
	 * This setting requires the FW to set all revision fields.
	 */
	if (mb->un.varRdRev.rr == 0) {
		vp->rev.rBit = 0;
		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
				"%d:0440 Adapter failed to init, READ_REV has "
				"missing revision information.\n",
				phba->brd_no);
		mempool_free(pmb, phba->mbox_mem_pool);
		return -ERESTART;
	}

	/* Save information as VPD data */
	vp->rev.rBit = 1;
	vp->rev.sli1FwRev = mb->un.varRdRev.sli1FwRev;
	memcpy(vp->rev.sli1FwName, (char*) mb->un.varRdRev.sli1FwName, 16);
	vp->rev.sli2FwRev = mb->un.varRdRev.sli2FwRev;
	memcpy(vp->rev.sli2FwName, (char *) mb->un.varRdRev.sli2FwName, 16);
	vp->rev.biuRev = mb->un.varRdRev.biuRev;
	vp->rev.smRev = mb->un.varRdRev.smRev;
	vp->rev.smFwRev = mb->un.varRdRev.un.smFwRev;
	vp->rev.endecRev = mb->un.varRdRev.endecRev;
	vp->rev.fcphHigh = mb->un.varRdRev.fcphHigh;
	vp->rev.fcphLow = mb->un.varRdRev.fcphLow;
	vp->rev.feaLevelHigh = mb->un.varRdRev.feaLevelHigh;
	vp->rev.feaLevelLow = mb->un.varRdRev.feaLevelLow;
	vp->rev.postKernRev = mb->un.varRdRev.postKernRev;
	vp->rev.opFwRev = mb->un.varRdRev.opFwRev;

	if (lpfc_is_LC_HBA(phba->pcidev->device))
		memcpy(phba->RandomData, (char *)&mb->un.varWords[24],
						sizeof (phba->RandomData));

	/* Get adapter VPD information */
	pmb->context2 = kmalloc(DMP_RSP_SIZE, GFP_KERNEL);
	if (!pmb->context2)
		goto out_free_mbox;
	lpfc_vpd_data = kmalloc(DMP_VPD_SIZE, GFP_KERNEL);
	if (!lpfc_vpd_data)
		goto out_free_context2;

	do {
		lpfc_dump_mem(phba, pmb, offset);
		rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);

		if (rc != MBX_SUCCESS) {
			lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
					"%d:0441 VPD not present on adapter, "
					"mbxCmd x%x DUMP VPD, mbxStatus x%x\n",
					phba->brd_no,
					mb->mbxCommand, mb->mbxStatus);
			mb->un.varDmp.word_cnt = 0;
		}
		if (mb->un.varDmp.word_cnt > DMP_VPD_SIZE - offset)
			mb->un.varDmp.word_cnt = DMP_VPD_SIZE - offset;
		lpfc_sli_pcimem_bcopy(pmb->context2, lpfc_vpd_data + offset,
							mb->un.varDmp.word_cnt);
		offset += mb->un.varDmp.word_cnt;
	} while (mb->un.varDmp.word_cnt && offset < DMP_VPD_SIZE);
	lpfc_parse_vpd(phba, lpfc_vpd_data, offset);

	kfree(lpfc_vpd_data);
out_free_context2:
	kfree(pmb->context2);
out_free_mbox:
	mempool_free(pmb, phba->mbox_mem_pool);
	return 0;
}

/************************************************************************/
/*                                                                      */
/*    lpfc_config_port_post                                             */
/*    This routine will do LPFC initialization after the                */
/*    CONFIG_PORT mailbox command. This will be initialized             */
/*    as a SLI layer callback routine.                                  */
/*    This routine returns 0 on success. Any other return value         */
/*    indicates an error.                                               */
/*                                                                      */
/************************************************************************/
int
lpfc_config_port_post(struct lpfc_hba * phba)
{
	LPFC_MBOXQ_t *pmb;
	MAILBOX_t *mb;
	struct lpfc_dmabuf *mp;
	struct lpfc_sli *psli = &phba->sli;
	uint32_t status, timeout;
	int i, j, rc;

	pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
	if (!pmb) {
		phba->hba_state = LPFC_HBA_ERROR;
		return -ENOMEM;
	}
	mb = &pmb->mb;

	lpfc_config_link(phba, pmb);
	rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
	if (rc != MBX_SUCCESS) {
		lpfc_printf_log(phba,
				KERN_ERR,
				LOG_INIT,
				"%d:0447 Adapter failed init, mbxCmd x%x "
				"CONFIG_LINK mbxStatus x%x\n",
				phba->brd_no,
				mb->mbxCommand, mb->mbxStatus);
		phba->hba_state = LPFC_HBA_ERROR;
		mempool_free( pmb, phba->mbox_mem_pool);
		return -EIO;
	}

	/* Get login parameters for NID.  */
	lpfc_read_sparam(phba, pmb);
	if (lpfc_sli_issue_mbox(phba, pmb, MBX_POLL) != MBX_SUCCESS) {
		lpfc_printf_log(phba,
				KERN_ERR,
				LOG_INIT,
				"%d:0448 Adapter failed init, mbxCmd x%x "
				"READ_SPARM mbxStatus x%x\n",
				phba->brd_no,
				mb->mbxCommand, mb->mbxStatus);
		phba->hba_state = LPFC_HBA_ERROR;
		mp = (struct lpfc_dmabuf *) pmb->context1;
		mempool_free( pmb, phba->mbox_mem_pool);
		lpfc_mbuf_free(phba, mp->virt, mp->phys);
		kfree(mp);
		return -EIO;
	}

	mp = (struct lpfc_dmabuf *) pmb->context1;

	memcpy(&phba->fc_sparam, mp->virt, sizeof (struct serv_parm));
	lpfc_mbuf_free(phba, mp->virt, mp->phys);
	kfree(mp);
	pmb->context1 = NULL;

	memcpy(&phba->fc_nodename, &phba->fc_sparam.nodeName,
	       sizeof (struct lpfc_name));
	memcpy(&phba->fc_portname, &phba->fc_sparam.portName,
	       sizeof (struct lpfc_name));
	/* If no serial number in VPD data, use low 6 bytes of WWNN */
	/* This should be consolidated into parse_vpd ? - mr */
	if (phba->SerialNumber[0] == 0) {
		uint8_t *outptr;

		outptr = &phba->fc_nodename.u.s.IEEE[0];
		for (i = 0; i < 12; i++) {
			status = *outptr++;
			j = ((status & 0xf0) >> 4);
			if (j <= 9)
				phba->SerialNumber[i] =
				    (char)((uint8_t) 0x30 + (uint8_t) j);
			else
				phba->SerialNumber[i] =
				    (char)((uint8_t) 0x61 + (uint8_t) (j - 10));
			i++;
			j = (status & 0xf);
			if (j <= 9)
				phba->SerialNumber[i] =
				    (char)((uint8_t) 0x30 + (uint8_t) j);
			else
				phba->SerialNumber[i] =
				    (char)((uint8_t) 0x61 + (uint8_t) (j - 10));
		}
	}

	lpfc_read_config(phba, pmb);
	if (lpfc_sli_issue_mbox(phba, pmb, MBX_POLL) != MBX_SUCCESS) {
		lpfc_printf_log(phba,
				KERN_ERR,
				LOG_INIT,
				"%d:0453 Adapter failed to init, mbxCmd x%x "
				"READ_CONFIG, mbxStatus x%x\n",
				phba->brd_no,
				mb->mbxCommand, mb->mbxStatus);
		phba->hba_state = LPFC_HBA_ERROR;
		mempool_free( pmb, phba->mbox_mem_pool);
		return -EIO;
	}

	/* Reset the DFT_HBA_Q_DEPTH to the max xri  */
	if (phba->cfg_hba_queue_depth > (mb->un.varRdConfig.max_xri+1))
		phba->cfg_hba_queue_depth =
			mb->un.varRdConfig.max_xri + 1;

	phba->lmt = mb->un.varRdConfig.lmt;

	/* Get the default values for Model Name and Description */
	lpfc_get_hba_model_desc(phba, phba->ModelName, phba->ModelDesc);

	if ((phba->cfg_link_speed > LINK_SPEED_10G)
	    || ((phba->cfg_link_speed == LINK_SPEED_1G)
		&& !(phba->lmt & LMT_1Gb))
	    || ((phba->cfg_link_speed == LINK_SPEED_2G)
		&& !(phba->lmt & LMT_2Gb))
	    || ((phba->cfg_link_speed == LINK_SPEED_4G)
		&& !(phba->lmt & LMT_4Gb))
	    || ((phba->cfg_link_speed == LINK_SPEED_8G)
		&& !(phba->lmt & LMT_8Gb))
	    || ((phba->cfg_link_speed == LINK_SPEED_10G)
		&& !(phba->lmt & LMT_10Gb))) {
		/* Reset link speed to auto */
		lpfc_printf_log(phba,
			KERN_WARNING,
			LOG_LINK_EVENT,
			"%d:1302 Invalid speed for this board: "
			"Reset link speed to auto: x%x\n",
			phba->brd_no,
			phba->cfg_link_speed);
			phba->cfg_link_speed = LINK_SPEED_AUTO;
	}

	phba->hba_state = LPFC_LINK_DOWN;

	/* Only process IOCBs on ring 0 till hba_state is READY */
	if (psli->ring[psli->ip_ring].cmdringaddr)
		psli->ring[psli->ip_ring].flag |= LPFC_STOP_IOCB_EVENT;
	if (psli->ring[psli->fcp_ring].cmdringaddr)
		psli->ring[psli->fcp_ring].flag |= LPFC_STOP_IOCB_EVENT;
	if (psli->ring[psli->next_ring].cmdringaddr)
		psli->ring[psli->next_ring].flag |= LPFC_STOP_IOCB_EVENT;

	/* Post receive buffers for desired rings */
	lpfc_post_rcv_buf(phba);

	/* Enable appropriate host interrupts */
	spin_lock_irq(phba->host->host_lock);
	status = readl(phba->HCregaddr);
	status |= HC_MBINT_ENA | HC_ERINT_ENA | HC_LAINT_ENA;
	if (psli->num_rings > 0)
		status |= HC_R0INT_ENA;
	if (psli->num_rings > 1)
		status |= HC_R1INT_ENA;
	if (psli->num_rings > 2)
		status |= HC_R2INT_ENA;
	if (psli->num_rings > 3)
		status |= HC_R3INT_ENA;

	if ((phba->cfg_poll & ENABLE_FCP_RING_POLLING) &&
	    (phba->cfg_poll & DISABLE_FCP_RING_INT))
		status &= ~(HC_R0INT_ENA << LPFC_FCP_RING);

	writel(status, phba->HCregaddr);
	readl(phba->HCregaddr); /* flush */
	spin_unlock_irq(phba->host->host_lock);

	/*
	 * Setup the ring 0 (els)  timeout handler
	 */
	timeout = phba->fc_ratov << 1;
	phba->els_tmofunc.expires = jiffies + HZ * timeout;
	add_timer(&phba->els_tmofunc);

	lpfc_init_link(phba, pmb, phba->cfg_topology, phba->cfg_link_speed);
	pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
	if (lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT) != MBX_SUCCESS) {
		lpfc_printf_log(phba,
				KERN_ERR,
				LOG_INIT,
				"%d:0454 Adapter failed to init, mbxCmd x%x "
				"INIT_LINK, mbxStatus x%x\n",
				phba->brd_no,
				mb->mbxCommand, mb->mbxStatus);

		/* Clear all interrupt enable conditions */
		writel(0, phba->HCregaddr);
		readl(phba->HCregaddr); /* flush */
		/* Clear all pending interrupts */
		writel(0xffffffff, phba->HAregaddr);
		readl(phba->HAregaddr); /* flush */

		phba->hba_state = LPFC_HBA_ERROR;
		mempool_free(pmb, phba->mbox_mem_pool);
		return -EIO;
	}
	/* MBOX buffer will be freed in mbox compl */

	i = 0;
	while ((phba->hba_state != LPFC_HBA_READY) ||
	       (phba->num_disc_nodes) || (phba->fc_prli_sent) ||
	       ((phba->fc_map_cnt == 0) && (i<2)) ||
	       (psli->sli_flag & LPFC_SLI_MBOX_ACTIVE)) {
		/* Check every second for 30 retries. */
		i++;
		if (i > 30) {
			break;
		}
		if ((i >= 15) && (phba->hba_state <= LPFC_LINK_DOWN)) {
			/* The link is down.  Set linkdown timeout */
			break;
		}

		/* Delay for 1 second to give discovery time to complete. */
		msleep(1000);

	}

	/* Since num_disc_nodes keys off of PLOGI, delay a bit to let
	 * any potential PRLIs to flush thru the SLI sub-system.
	 */
	msleep(50);

	return (0);
}

/************************************************************************/
/*                                                                      */
/*    lpfc_hba_down_prep                                                */
/*    This routine will do LPFC uninitialization before the             */
/*    HBA is reset when bringing down the SLI Layer. This will be       */
/*    initialized as a SLI layer callback routine.                      */
/*    This routine returns 0 on success. Any other return value         */
/*    indicates an error.                                               */
/*                                                                      */
/************************************************************************/
int
lpfc_hba_down_prep(struct lpfc_hba * phba)
{
	/* Disable interrupts */
	writel(0, phba->HCregaddr);
	readl(phba->HCregaddr); /* flush */

	/* Cleanup potential discovery resources */
	lpfc_els_flush_rscn(phba);
	lpfc_els_flush_cmd(phba);
	lpfc_disc_flush_list(phba);

	return (0);
}

/************************************************************************/
/*                                                                      */
/*    lpfc_hba_down_post                                                */
/*    This routine will do uninitialization after the HBA is reset      */
/*    when bringing down the SLI Layer.                                 */
/*    This routine returns 0 on success. Any other return value         */
/*    indicates an error.                                               */
/*                                                                      */
/************************************************************************/
int
lpfc_hba_down_post(struct lpfc_hba * phba)
{