path: root/drivers/scsi/be2iscsi/be_cmds.c

/**
 * Copyright (C) 2005 - 2011 Emulex
 * All rights reserved.
 *
 * 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.  The full GNU General
 * Public License is included in this distribution in the file called COPYING.
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 */

#include <scsi/iscsi_proto.h>

#include "be.h"
#include "be_mgmt.h"
#include "be_main.h"

int beiscsi_pci_soft_reset(struct beiscsi_hba *phba)
{
	u32 sreset;
	u8 *pci_reset_offset = 0;
	u8 *pci_online0_offset = 0;
	u8 *pci_online1_offset = 0;
	u32 pconline0 = 0;
	u32 pconline1 = 0;
	u32 i;

	pci_reset_offset = (u8 *)phba->pci_va + BE2_SOFT_RESET;
	pci_online0_offset = (u8 *)phba->pci_va + BE2_PCI_ONLINE0;
	pci_online1_offset = (u8 *)phba->pci_va + BE2_PCI_ONLINE1;
	sreset = readl((void *)pci_reset_offset);
	sreset |= BE2_SET_RESET;
	writel(sreset, (void *)pci_reset_offset);

	i = 0;
	while (sreset & BE2_SET_RESET) {
		if (i > 64)
			break;
		msleep(100);
		sreset = readl((void *)pci_reset_offset);
		i++;
	}

	if (sreset & BE2_SET_RESET) {
		printk(KERN_ERR DRV_NAME
		       " Soft Reset  did not deassert\n");
		return -EIO;
	}
	pconline1 = BE2_MPU_IRAM_ONLINE;
	writel(pconline0, (void *)pci_online0_offset);
	writel(pconline1, (void *)pci_online1_offset);

	sreset = BE2_SET_RESET;
	writel(sreset, (void *)pci_reset_offset);

	i = 0;
	while (sreset & BE2_SET_RESET) {
		if (i > 64)
			break;
		msleep(1);
		sreset = readl((void *)pci_reset_offset);
		i++;
	}
	if (sreset & BE2_SET_RESET) {
		printk(KERN_ERR DRV_NAME
		       " MPU Online Soft Reset did not deassert\n");
		return -EIO;
	}
	return 0;
}

int be_chk_reset_complete(struct beiscsi_hba *phba)
{
	unsigned int num_loop;
	u8 *mpu_sem = 0;
	u32 status;

	num_loop = 1000;
	mpu_sem = (u8 *)phba->csr_va + MPU_EP_SEMAPHORE;
	msleep(5000);

	while (num_loop) {
		status = readl((void *)mpu_sem);

		if ((status & 0x80000000) || (status & 0x0000FFFF) == 0xC000)
			break;
		msleep(60);
		num_loop--;
	}

	if ((status & 0x80000000) || (!num_loop)) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
			    "BC_%d : Failed in be_chk_reset_complete"
			    "status = 0x%x\n", status);
		return -EIO;
	}

	return 0;
}

void be_mcc_notify(struct beiscsi_hba *phba)
{
	struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
	u32 val = 0;

	val |= mccq->id & DB_MCCQ_RING_ID_MASK;
	val |= 1 << DB_MCCQ_NUM_POSTED_SHIFT;
	iowrite32(val, phba->db_va + DB_MCCQ_OFFSET);
}

unsigned int alloc_mcc_tag(struct beiscsi_hba *phba)
{
	unsigned int tag = 0;

	if (phba->ctrl.mcc_tag_available) {
		tag = phba->ctrl.mcc_tag[phba->ctrl.mcc_alloc_index];
		phba->ctrl.mcc_tag[phba->ctrl.mcc_alloc_index] = 0;
		phba->ctrl.mcc_numtag[tag] = 0;
	}
	if (tag) {
		phba->ctrl.mcc_tag_available--;
		if (phba->ctrl.mcc_alloc_index == (MAX_MCC_CMD - 1))
			phba->ctrl.mcc_alloc_index = 0;
		else
			phba->ctrl.mcc_alloc_index++;
	}
	return tag;
}

void free_mcc_tag(struct be_ctrl_info *ctrl, unsigned int tag)
{
	spin_lock(&ctrl->mbox_lock);
	tag = tag & 0x000000FF;
	ctrl->mcc_tag[ctrl->mcc_free_index] = tag;
	if (ctrl->mcc_free_index == (MAX_MCC_CMD - 1))
		ctrl->mcc_free_index = 0;
	else