be_mgmt.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.
 *
 * Written by: Jayamohan Kallickal (jayamohan.kallickal@emulex.com)
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 */

#include <linux/bsg-lib.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/scsi_bsg_iscsi.h>
#include "be_mgmt.h"
#include "be_iscsi.h"

/**
 * mgmt_reopen_session()- Reopen a session based on reopen_type
 * @phba: Device priv structure instance
 * @reopen_type: Type of reopen_session FW should do.
 * @sess_handle: Session Handle of the session to be re-opened
 *
 * return
 *	the TAG used for MBOX Command
 *
 **/
unsigned int mgmt_reopen_session(struct beiscsi_hba *phba,
				  unsigned int reopen_type,
				  unsigned int sess_handle)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_cmd_reopen_session_req *req;
	unsigned int tag = 0;

	SE_DEBUG(DBG_LVL_8, "In bescsi_get_boot_target\n");
	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}

	wrb = wrb_from_mccq(phba);
	req = embedded_payload(wrb);
	wrb->tag0 |= tag;
	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
			   OPCODE_ISCSI_INI_DRIVER_REOPEN_ALL_SESSIONS,
			   sizeof(struct be_cmd_reopen_session_resp));

	/* set the reopen_type,sess_handle */
	req->reopen_type = reopen_type;
	req->session_handle = sess_handle;

	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

unsigned int mgmt_get_boot_target(struct beiscsi_hba *phba)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_cmd_get_boot_target_req *req;
	unsigned int tag = 0;

	SE_DEBUG(DBG_LVL_8, "In bescsi_get_boot_target\n");
	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}

	wrb = wrb_from_mccq(phba);
	req = embedded_payload(wrb);
	wrb->tag0 |= tag;
	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
			   OPCODE_ISCSI_INI_BOOT_GET_BOOT_TARGET,
			   sizeof(struct be_cmd_get_boot_target_resp));

	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

unsigned int mgmt_get_session_info(struct beiscsi_hba *phba,
				   u32 boot_session_handle,
				   struct be_dma_mem *nonemb_cmd)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	unsigned int tag = 0;
	struct  be_cmd_get_session_req *req;
	struct be_cmd_get_session_resp *resp;
	struct be_sge *sge;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_get_session_info\n");
	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}

	nonemb_cmd->size = sizeof(*resp);
	req = nonemb_cmd->va;
	memset(req, 0, sizeof(*req));
	wrb = wrb_from_mccq(phba);
	sge = nonembedded_sgl(wrb);
	wrb->tag0 |= tag;


	wrb->tag0 |= tag;
	be_wrb_hdr_prepare(wrb, sizeof(*req), false, 1);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
			   OPCODE_ISCSI_INI_SESSION_GET_A_SESSION,
			   sizeof(*resp));
	req->session_handle = boot_session_handle;
	sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
	sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
	sge->len = cpu_to_le32(nonemb_cmd->size);

	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

int mgmt_get_fw_config(struct be_ctrl_info *ctrl,
				struct beiscsi_hba *phba)
{
	struct be_mcc_wrb *wrb = wrb_from_mbox(&ctrl->mbox_mem);
	struct be_fw_cfg *req = embedded_payload(wrb);
	int status = 0;

	spin_lock(&ctrl->mbox_lock);
	memset(wrb, 0, sizeof(*wrb));

	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);

	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
			   OPCODE_COMMON_QUERY_FIRMWARE_CONFIG, sizeof(*req));
	status = be_mbox_notify(ctrl);
	if (!status) {
		struct be_fw_cfg *pfw_cfg;
		pfw_cfg = req;
		phba->fw_config.phys_port = pfw_cfg->phys_port;
		phba->fw_config.iscsi_icd_start =
					pfw_cfg->ulp[0].icd_base;
		phba->fw_config.iscsi_icd_count =
					pfw_cfg->ulp[0].icd_count;
		phba->fw_config.iscsi_cid_start =
					pfw_cfg->ulp[0].sq_base;
		phba->fw_config.iscsi_cid_count =
					pfw_cfg->ulp[0].sq_count;
		if (phba->fw_config.iscsi_cid_count > (BE2_MAX_SESSIONS / 2)) {
			SE_DEBUG(DBG_LVL_8,
				"FW reported MAX CXNS as %d\t"
				"Max Supported = %d.\n",
				phba->fw_config.iscsi_cid_count,
				BE2_MAX_SESSIONS);
			phba->fw_config.iscsi_cid_count = BE2_MAX_SESSIONS / 2;
		}
	} else {
		shost_printk(KERN_WARNING, phba->shost,
			     "Failed in mgmt_get_fw_config\n");
	}

	spin_unlock(&ctrl->mbox_lock);
	return status;
}

int mgmt_check_supported_fw(struct be_ctrl_info *ctrl,
				      struct beiscsi_hba *phba)
{
	struct be_dma_mem nonemb_cmd;
	struct be_mcc_wrb *wrb = wrb_from_mbox(&ctrl->mbox_mem);
	struct be_mgmt_controller_attributes *req;
	struct be_sge *sge = nonembedded_sgl(wrb);
	int status = 0;

	nonemb_cmd.va = pci_alloc_consistent(ctrl->pdev,
				sizeof(struct be_mgmt_controller_attributes),
				&nonemb_cmd.dma);
	if (nonemb_cmd.va == NULL) {
		SE_DEBUG(DBG_LVL_1,
			 "Failed to allocate memory for mgmt_check_supported_fw"
			 "\n");
		return -ENOMEM;
	}
	nonemb_cmd.size = sizeof(struct be_mgmt_controller_attributes);
	req = nonemb_cmd.va;
	memset(req, 0, sizeof(*req));
	spin_lock(&ctrl->mbox_lock);
	memset(wrb, 0, sizeof(*wrb));
	be_wrb_hdr_prepare(wrb, sizeof(*req), false, 1);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
			   OPCODE_COMMON_GET_CNTL_ATTRIBUTES, sizeof(*req));
	sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd.dma));
	sge->pa_lo = cpu_to_le32(nonemb_cmd.dma & 0xFFFFFFFF);
	sge->len = cpu_to_le32(nonemb_cmd.size);
	status = be_mbox_notify(ctrl);
	if (!status) {
		struct be_mgmt_controller_attributes_resp *resp = nonemb_cmd.va;
		SE_DEBUG(DBG_LVL_8, "Firmware version of CMD: %s\n",
			resp->params.hba_attribs.flashrom_version_string);
		SE_DEBUG(DBG_LVL_8, "Firmware version is : %s\n",
			resp->params.hba_attribs.firmware_version_string);
		SE_DEBUG(DBG_LVL_8,
			"Developer Build, not performing version check...\n");
		phba->fw_config.iscsi_features =
				resp->params.hba_attribs.iscsi_features;
		SE_DEBUG(DBG_LVL_8, " phba->fw_config.iscsi_features = %d\n",
				      phba->fw_config.iscsi_features);
	} else
		SE_DEBUG(DBG_LVL_1, " Failed in mgmt_check_supported_fw\n");
	spin_unlock(&ctrl->mbox_lock);
	if (nonemb_cmd.va)
		pci_free_consistent(ctrl->pdev, nonemb_cmd.size,
				    nonemb_cmd.va, nonemb_cmd.dma);

	return status;
}

unsigned int mgmt_vendor_specific_fw_cmd(struct be_ctrl_info *ctrl,
					 struct beiscsi_hba *phba,
					 struct bsg_job *job,
					 struct be_dma_mem *nonemb_cmd)
{
	struct be_cmd_resp_hdr *resp;
	struct be_mcc_wrb *wrb = wrb_from_mccq(phba);
	struct be_sge *mcc_sge = nonembedded_sgl(wrb);
	unsigned int tag = 0;
	struct iscsi_bsg_request *bsg_req = job->request;
	struct be_bsg_vendor_cmd *req = nonemb_cmd->va;
	unsigned short region, sector_size, sector, offset;

	nonemb_cmd->size = job->request_payload.payload_len;
	memset(nonemb_cmd->va, 0, nonemb_cmd->size);
	resp = nonemb_cmd->va;
	region =  bsg_req->rqst_data.h_vendor.vendor_cmd[1];
	sector_size =  bsg_req->rqst_data.h_vendor.vendor_cmd[2];
	sector =  bsg_req->rqst_data.h_vendor.vendor_cmd[3];
	offset =  bsg_req->rqst_data.h_vendor.vendor_cmd[4];
	req->region = region;
	req->sector = sector;
	req->offset = offset;
	spin_lock(&ctrl->mbox_lock);
	memset(wrb, 0, sizeof(*wrb));

	switch (bsg_req->rqst_data.h_vendor.vendor_cmd[0]) {
	case BEISCSI_WRITE_FLASH:
		offset = sector * sector_size + offset;
		be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
				   OPCODE_COMMON_WRITE_FLASH, sizeof(*req));
		sg_copy_to_buffer(job->request_payload.sg_list,
				  job->request_payload.sg_cnt,
				  nonemb_cmd->va + offset, job->request_len);
		break;
	case BEISCSI_READ_FLASH:
		be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
			   OPCODE_COMMON_READ_FLASH, sizeof(*req));
		break;
	default:
		shost_printk(KERN_WARNING, phba->shost,
			     "Unsupported cmd = 0x%x\n\n", bsg_req->rqst_data.
			     h_vendor.vendor_cmd[0]);
		spin_unlock(&ctrl->mbox_lock);
		return -ENOSYS;
	}

	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}

	be_wrb_hdr_prepare(wrb, nonemb_cmd->size, false,
			   job->request_payload.sg_cnt);
	mcc_sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
	mcc_sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
	mcc_sge->len = cpu_to_le32(nonemb_cmd->size);
	wrb->tag0 |= tag;

	be_mcc_notify(phba);

	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

int mgmt_epfw_cleanup(struct beiscsi_hba *phba, unsigned short chute)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb = wrb_from_mccq(phba);
	struct iscsi_cleanup_req *req = embedded_payload(wrb);
	int status = 0;

	spin_lock(&ctrl->mbox_lock);
	memset(wrb, 0, sizeof(*wrb));

	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
			   OPCODE_COMMON_ISCSI_CLEANUP, sizeof(*req));

	req->chute = chute;
	req->hdr_ring_id = cpu_to_le16(HWI_GET_DEF_HDRQ_ID(phba));
	req->data_ring_id = cpu_to_le16(HWI_GET_DEF_BUFQ_ID(phba));

	status =  be_mcc_notify_wait(phba);
	if (status)
		shost_printk(KERN_WARNING, phba->shost,
			     " mgmt_epfw_cleanup , FAILED\n");
	spin_unlock(&ctrl->mbox_lock);
	return status;
}

unsigned int  mgmt_invalidate_icds(struct beiscsi_hba *phba,
				struct invalidate_command_table *inv_tbl,
				unsigned int num_invalidate, unsigned int cid,
				struct be_dma_mem *nonemb_cmd)

{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_sge *sge;
	struct invalidate_commands_params_in *req;
	unsigned int i, tag = 0;

	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}

	req = nonemb_cmd->va;
	memset(req, 0, sizeof(*req));
	wrb = wrb_from_mccq(phba);
	sge = nonembedded_sgl(wrb);
	wrb->tag0 |= tag;

	be_wrb_hdr_prepare(wrb, sizeof(*req), false, 1);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
			OPCODE_COMMON_ISCSI_ERROR_RECOVERY_INVALIDATE_COMMANDS,
			sizeof(*req));
	req->ref_handle = 0;
	req->cleanup_type = CMD_ISCSI_COMMAND_INVALIDATE;
	for (i = 0; i < num_invalidate; i++) {
		req->table[i].icd = inv_tbl->icd;
		req->table[i].cid = inv_tbl->cid;
		req->icd_count++;
		inv_tbl++;
	}
	sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
	sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
	sge->len = cpu_to_le32(nonemb_cmd->size);

	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

unsigned int mgmt_invalidate_connection(struct beiscsi_hba *phba,
					 struct beiscsi_endpoint *beiscsi_ep,
					 unsigned short cid,
					 unsigned short issue_reset,
					 unsigned short savecfg_flag)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct iscsi_invalidate_connection_params_in *req;
	unsigned int tag = 0;

	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}
	wrb = wrb_from_mccq(phba);
	wrb->tag0 |= tag;
	req = embedded_payload(wrb);

	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
			   OPCODE_ISCSI_INI_DRIVER_INVALIDATE_CONNECTION,
			   sizeof(*req));
	req->session_handle = beiscsi_ep->fw_handle;
	req->cid = cid;
	if (issue_reset)
		req->cleanup_type = CMD_ISCSI_CONNECTION_ISSUE_TCP_RST;
	else
		req->cleanup_type = CMD_ISCSI_CONNECTION_INVALIDATE;
	req->save_cfg = savecfg_flag;
	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

unsigned int mgmt_upload_connection(struct beiscsi_hba *phba,
				unsigned short cid, unsigned int upload_flag)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct tcp_upload_params_in *req;
	unsigned int tag = 0;

	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}
	wrb = wrb_from_mccq(phba);
	req = embedded_payload(wrb);
	wrb->tag0 |= tag;

	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_COMMON_TCP_UPLOAD,
			   OPCODE_COMMON_TCP_UPLOAD, sizeof(*req));
	req->id = (unsigned short)cid;
	req->upload_type = (unsigned char)upload_flag;
	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

int mgmt_open_connection(struct beiscsi_hba *phba,
			 struct sockaddr *dst_addr,
			 struct beiscsi_endpoint *beiscsi_ep,
			 struct be_dma_mem *nonemb_cmd)
{
	struct hwi_controller *phwi_ctrlr;
	struct hwi_context_memory *phwi_context;
	struct sockaddr_in *daddr_in = (struct sockaddr_in *)dst_addr;
	struct sockaddr_in6 *daddr_in6 = (struct sockaddr_in6 *)dst_addr;
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct tcp_connect_and_offload_in *req;
	unsigned short def_hdr_id;
	unsigned short def_data_id;
	struct phys_addr template_address = { 0, 0 };
	struct phys_addr *ptemplate_address;
	unsigned int tag = 0;
	unsigned int i;
	unsigned short cid = beiscsi_ep->ep_cid;
	struct be_sge *sge;

	phwi_ctrlr = phba->phwi_ctrlr;
	phwi_context = phwi_ctrlr->phwi_ctxt;
	def_hdr_id = (unsigned short)HWI_GET_DEF_HDRQ_ID(phba);
	def_data_id = (unsigned short)HWI_GET_DEF_BUFQ_ID(phba);

	ptemplate_address = &template_address;
	ISCSI_GET_PDU_TEMPLATE_ADDRESS(phba, ptemplate_address);
	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}
	wrb = wrb_from_mccq(phba);
	memset(wrb, 0, sizeof(*wrb));
	sge = nonembedded_sgl(wrb);

	req = nonemb_cmd->va;
	memset(req, 0, sizeof(*req));
	wrb->tag0 |= tag;

	be_wrb_hdr_prepare(wrb, sizeof(*req), false, 1);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
			   OPCODE_COMMON_ISCSI_TCP_CONNECT_AND_OFFLOAD,
			   sizeof(*req));
	if (dst_addr->sa_family == PF_INET) {
		__be32 s_addr = daddr_in->sin_addr.s_addr;
		req->ip_address.ip_type = BE2_IPV4;
		req->ip_address.addr[0] = s_addr & 0x000000ff;
		req->ip_address.addr[1] = (s_addr & 0x0000ff00) >> 8;
		req->ip_address.addr[2] = (s_addr & 0x00ff0000) >> 16;
		req->ip_address.addr[3] = (s_addr & 0xff000000) >> 24;
		req->tcp_port = ntohs(daddr_in->sin_port);
		beiscsi_ep->dst_addr = daddr_in->sin_addr.s_addr;
		beiscsi_ep->dst_tcpport = ntohs(daddr_in->sin_port);
		beiscsi_ep->ip_type = BE2_IPV4;
	} else if (dst_addr->sa_family == PF_INET6) {
		req->ip_address.ip_type = BE2_IPV6;
		memcpy(&req->ip_address.addr,
		       &daddr_in6->sin6_addr.in6_u.u6_addr8, 16);
		req->tcp_port = ntohs(daddr_in6->sin6_port);
		beiscsi_ep->dst_tcpport = ntohs(daddr_in6->sin6_port);
		memcpy(&beiscsi_ep->dst6_addr,
		       &daddr_in6->sin6_addr.in6_u.u6_addr8, 16);
		beiscsi_ep->ip_type = BE2_IPV6;
	} else{
		shost_printk(KERN_ERR, phba->shost, "unknown addr family %d\n",
			     dst_addr->sa_family);
		spin_unlock(&ctrl->mbox_lock);
		free_mcc_tag(&phba->ctrl, tag);
		return -EINVAL;

	}
	req->cid = cid;
	i = phba->nxt_cqid++;
	if (phba->nxt_cqid == phba->num_cpus)
		phba->nxt_cqid = 0;
	req->cq_id = phwi_context->be_cq[i].id;
	SE_DEBUG(DBG_LVL_8, "i=%d cq_id=%d\n", i, req->cq_id);
	req->defq_id = def_hdr_id;
	req->hdr_ring_id = def_hdr_id;
	req->data_ring_id = def_data_id;
	req->do_offload = 1;
	req->dataout_template_pa.lo = ptemplate_address->lo;
	req->dataout_template_pa.hi = ptemplate_address->hi;
	sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
	sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
	sge->len = cpu_to_le32(nonemb_cmd->size);
	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

unsigned int mgmt_get_all_if_id(struct beiscsi_hba *phba)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb = wrb_from_mbox(&ctrl->mbox_mem);
	struct be_cmd_get_all_if_id_req *req = embedded_payload(wrb);
	struct be_cmd_get_all_if_id_req *pbe_allid = req;
	int status = 0;

	memset(wrb, 0, sizeof(*wrb));

	spin_lock(&ctrl->mbox_lock);

	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
			   OPCODE_COMMON_ISCSI_NTWK_GET_ALL_IF_ID,
			   sizeof(*req));
	status = be_mbox_notify(ctrl);
	if (!status)
		phba->interface_handle = pbe_allid->if_hndl_list[0];
	else {
		shost_printk(KERN_WARNING, phba->shost,
			     "Failed in mgmt_get_all_if_id\n");
	}
	spin_unlock(&ctrl->mbox_lock);

	return status;
}

static int mgmt_exec_nonemb_cmd(struct beiscsi_hba *phba,
				struct be_dma_mem *nonemb_cmd, void *resp_buf,
				int resp_buf_len)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb = wrb_from_mccq(phba);
	unsigned short status, extd_status;
	struct be_sge *sge;
	unsigned int tag;
	int rc = 0;

	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		rc = -ENOMEM;
		goto free_cmd;
	}
	memset(wrb, 0, sizeof(*wrb));
	wrb->tag0 |= tag;
	sge = nonembedded_sgl(wrb);

	be_wrb_hdr_prepare(wrb, nonemb_cmd->size, false, 1);
	sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
	sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
	sge->len = cpu_to_le32(nonemb_cmd->size);

	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);

	wait_event_interruptible(phba->ctrl.mcc_wait[tag],
				 phba->ctrl.mcc_numtag[tag]);

	extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
	status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
	if (status || extd_status) {
		SE_DEBUG(DBG_LVL_1,
			 "mgmt_exec_nonemb_cmd Failed status = %d"
			 "extd_status = %d\n", status, extd_status);
		rc = -EIO;
		goto free_tag;
	}

	if (resp_buf)
		memcpy(resp_buf, nonemb_cmd->va, resp_buf_len);

free_tag:
	free_mcc_tag(&phba->ctrl, tag);
free_cmd:
	pci_free_consistent(ctrl->pdev, nonemb_cmd->size,
			    nonemb_cmd->va, nonemb_cmd->dma);
	return rc;
}

static int mgmt_alloc_cmd_data(struct beiscsi_hba *phba, struct be_dma_mem *cmd,
			       int iscsi_cmd, int size)
{
	cmd->va = pci_alloc_consistent(phba->ctrl.pdev, size, &cmd->dma);
	if (!cmd->va) {
		SE_DEBUG(DBG_LVL_1, "Failed to allocate memory for if info\n");
		return -ENOMEM;
	}
	memset(cmd->va, 0, size);
	cmd->size = size;
	be_cmd_hdr_prepare(cmd->va, CMD_SUBSYSTEM_ISCSI, iscsi_cmd, size);
	return 0;
}

static int
mgmt_static_ip_modify(struct beiscsi_hba *phba,
		      struct be_cmd_get_if_info_resp *if_info,
		      struct iscsi_iface_param_info *ip_param,
		      struct iscsi_iface_param_info *subnet_param,
		      uint32_t ip_action)
{
	struct be_cmd_set_ip_addr_req *req;
	struct be_dma_mem nonemb_cmd;
	uint32_t ip_type;
	int rc;

	rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				 OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR,
				 sizeof(*req));
	if (rc)
		return rc;

	ip_type = (ip_param->param == ISCSI_NET_PARAM_IPV6_ADDR) ?
		BE2_IPV6 : BE2_IPV4 ;

	req = nonemb_cmd.va;
	req->ip_params.record_entry_count = 1;
	req->ip_params.ip_record.action = ip_action;
	req->ip_params.ip_record.interface_hndl =
		phba->interface_handle;
	req->ip_params.ip_record.ip_addr.size_of_structure =
		sizeof(struct be_ip_addr_subnet_format);
	req->ip_params.ip_record.ip_addr.ip_type = ip_type;

	if (ip_action == IP_ACTION_ADD) {
		memcpy(req->ip_params.ip_record.ip_addr.addr, ip_param->value,
		       ip_param->len);

		if (subnet_param)
			memcpy(req->ip_params.ip_record.ip_addr.subnet_mask,
			       subnet_param->value, subnet_param->len);
	} else {
		memcpy(req->ip_params.ip_record.ip_addr.addr,
		       if_info->ip_addr.addr, ip_param->len);

		memcpy(req->ip_params.ip_record.ip_addr.subnet_mask,
		       if_info->ip_addr.subnet_mask, ip_param->len);
	}

	rc = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
	if (rc < 0)
		shost_printk(KERN_WARNING, phba->shost,
			     "Failed to Modify existing IP Address\n");
	return rc;
}

static int mgmt_modify_gateway(struct beiscsi_hba *phba, uint8_t *gt_addr,
			       uint32_t gtway_action, uint32_t param_len)
{
	struct be_cmd_set_def_gateway_req *req;
	struct be_dma_mem nonemb_cmd;
	int rt_val;


	rt_val = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				OPCODE_COMMON_ISCSI_NTWK_MODIFY_DEFAULT_GATEWAY,
				sizeof(*req));
	if (rt_val)
		return rt_val;

	req = nonemb_cmd.va;
	req->action = gtway_action;
	req->ip_addr.ip_type = BE2_IPV4;

	memcpy(req->ip_addr.addr, gt_addr, param_len);

	return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
}

int mgmt_set_ip(struct beiscsi_hba *phba,
		struct iscsi_iface_param_info *ip_param,
		struct iscsi_iface_param_info *subnet_param,
		uint32_t boot_proto)
{
	struct be_cmd_get_def_gateway_resp gtway_addr_set;
	struct be_cmd_get_if_info_resp if_info;
	struct be_cmd_set_dhcp_req *dhcpreq;
	struct be_cmd_rel_dhcp_req *reldhcp;
	struct be_dma_mem nonemb_cmd;
	uint8_t *gtway_addr;
	uint32_t ip_type;
	int rc;

	if (mgmt_get_all_if_id(phba))
		return -EIO;

	memset(&if_info, 0, sizeof(if_info));
	ip_type = (ip_param->param == ISCSI_NET_PARAM_IPV6_ADDR) ?
		BE2_IPV6 : BE2_IPV4 ;

	rc = mgmt_get_if_info(phba, ip_type, &if_info);
	if (rc)
		return rc;

	if (boot_proto == ISCSI_BOOTPROTO_DHCP) {
		if (if_info.dhcp_state) {
			shost_printk(KERN_WARNING, phba->shost,
				     "DHCP Already Enabled\n");
			return 0;
		}
		/* The ip_param->len is 1 in DHCP case. Setting
		   proper IP len as this it is used while
		   freeing the Static IP.
		 */
		ip_param->len = (ip_param->param == ISCSI_NET_PARAM_IPV6_ADDR) ?
				IP_V6_LEN : IP_V4_LEN;

	} else {
		if (if_info.dhcp_state) {

			memset(&if_info, 0, sizeof(if_info));
			rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				OPCODE_COMMON_ISCSI_NTWK_REL_STATELESS_IP_ADDR,
				sizeof(*reldhcp));

			if (rc)
				return rc;

			reldhcp = nonemb_cmd.va;
			reldhcp->interface_hndl = phba->interface_handle;
			reldhcp->ip_type = ip_type;

			rc = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
			if (rc < 0) {
				shost_printk(KERN_WARNING, phba->shost,
					     "Failed to Delete existing dhcp\n");
				return rc;
			}
		}
	}

	/* Delete the Static IP Set */
	if (if_info.ip_addr.addr[0]) {
		rc = mgmt_static_ip_modify(phba, &if_info, ip_param, NULL,
					   IP_ACTION_DEL);
		if (rc)
			return rc;
	}

	/* Delete the Gateway settings if mode change is to DHCP */
	if (boot_proto == ISCSI_BOOTPROTO_DHCP) {
		memset(&gtway_addr_set, 0, sizeof(gtway_addr_set));
		rc = mgmt_get_gateway(phba, BE2_IPV4, &gtway_addr_set);
		if (rc) {
			shost_printk(KERN_WARNING, phba->shost,
				     "Failed to Get Gateway Addr\n");
			return rc;
		}

		if (gtway_addr_set.ip_addr.addr[0]) {
			gtway_addr = (uint8_t *)&gtway_addr_set.ip_addr.addr;
			rc = mgmt_modify_gateway(phba, gtway_addr,
						 IP_ACTION_DEL, IP_V4_LEN);

			if (rc) {
				shost_printk(KERN_WARNING, phba->shost,
					     "Failed to clear Gateway Addr Set\n");
				return rc;
			}
		}
	}

	/* Set Adapter to DHCP/Static Mode */
	if (boot_proto == ISCSI_BOOTPROTO_DHCP) {
		rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
			OPCODE_COMMON_ISCSI_NTWK_CONFIG_STATELESS_IP_ADDR,
			sizeof(*dhcpreq));
		if (rc)
			return rc;

		dhcpreq = nonemb_cmd.va;
		dhcpreq->flags = BLOCKING;
		dhcpreq->retry_count = 1;
		dhcpreq->interface_hndl = phba->interface_handle;
		dhcpreq->ip_type = BE2_DHCP_V4;

		return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
	} else {
		return mgmt_static_ip_modify(phba, &if_info, ip_param,
					     subnet_param, IP_ACTION_ADD);
	}

	return rc;
}

int mgmt_set_gateway(struct beiscsi_hba *phba,
		     struct iscsi_iface_param_info *gateway_param)
{
	struct be_cmd_get_def_gateway_resp gtway_addr_set;
	uint8_t *gtway_addr;
	int rt_val;

	memset(&gtway_addr_set, 0, sizeof(gtway_addr_set));
	rt_val = mgmt_get_gateway(phba, BE2_IPV4, &gtway_addr_set);
	if (rt_val) {
		shost_printk(KERN_WARNING, phba->shost,
			     "Failed to Get Gateway Addr\n");
		return rt_val;
	}

	if (gtway_addr_set.ip_addr.addr[0]) {
		gtway_addr = (uint8_t *)&gtway_addr_set.ip_addr.addr;
		rt_val = mgmt_modify_gateway(phba, gtway_addr, IP_ACTION_DEL,
					     gateway_param->len);
		if (rt_val) {
			shost_printk(KERN_WARNING, phba->shost,
				     "Failed to clear Gateway Addr Set\n");
			return rt_val;
		}
	}

	gtway_addr = (uint8_t *)&gateway_param->value;
	rt_val = mgmt_modify_gateway(phba, gtway_addr, IP_ACTION_ADD,
				     gateway_param->len);

	if (rt_val)
		shost_printk(KERN_WARNING, phba->shost,
			     "Failed to Set Gateway Addr\n");

	return rt_val;
}

int mgmt_get_gateway(struct beiscsi_hba *phba, int ip_type,
		     struct be_cmd_get_def_gateway_resp *gateway)
{
	struct be_cmd_get_def_gateway_req *req;
	struct be_dma_mem nonemb_cmd;
	int rc;

	rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				 OPCODE_COMMON_ISCSI_NTWK_GET_DEFAULT_GATEWAY,
				 sizeof(*gateway));
	if (rc)
		return rc;

	req = nonemb_cmd.va;
	req->ip_type = ip_type;

	return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, gateway,
				    sizeof(*gateway));
}

int mgmt_get_if_info(struct beiscsi_hba *phba, int ip_type,
		     struct be_cmd_get_if_info_resp *if_info)
{
	struct be_cmd_get_if_info_req *req;
	struct be_dma_mem nonemb_cmd;
	int rc;

	if (mgmt_get_all_if_id(phba))
		return -EIO;

	rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				 OPCODE_COMMON_ISCSI_NTWK_GET_IF_INFO,
				 sizeof(*if_info));
	if (rc)
		return rc;

	req = nonemb_cmd.va;
	req->interface_hndl = phba->interface_handle;
	req->ip_type = ip_type;

	return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, if_info,
				    sizeof(*if_info));
}

int mgmt_get_nic_conf(struct beiscsi_hba *phba,
		      struct be_cmd_get_nic_conf_resp *nic)
{
	struct be_dma_mem nonemb_cmd;
	int rc;

	rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				 OPCODE_COMMON_ISCSI_NTWK_GET_NIC_CONFIG,
				 sizeof(*nic));
	if (rc)
		return rc;

	return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, nic, sizeof(*nic));
}



unsigned int be_cmd_get_initname(struct beiscsi_hba *phba)
{
	unsigned int tag = 0;
	struct be_mcc_wrb *wrb;
	struct be_cmd_hba_name *req;
	struct be_ctrl_info *ctrl = &phba->ctrl;

	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}

	wrb = wrb_from_mccq(phba);
	req = embedded_payload(wrb);
	wrb->tag0 |= tag;
	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
			OPCODE_ISCSI_INI_CFG_GET_HBA_NAME,
			sizeof(*req));

	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

unsigned int be_cmd_get_port_speed(struct beiscsi_hba *phba)
{
	unsigned int tag = 0;
	struct be_mcc_wrb *wrb;
	struct be_cmd_ntwk_link_status_req *req;
	struct be_ctrl_info *ctrl = &phba->ctrl;

	spin_lock(&ctrl->mbox_lock);
	tag = alloc_mcc_tag(phba);
	if (!tag) {
		spin_unlock(&ctrl->mbox_lock);
		return tag;
	}

	wrb = wrb_from_mccq(phba);
	req = embedded_payload(wrb);
	wrb->tag0 |= tag;
	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
			OPCODE_COMMON_NTWK_LINK_STATUS_QUERY,
			sizeof(*req));

	be_mcc_notify(phba);
	spin_unlock(&ctrl->mbox_lock);
	return tag;
}

/**
 * be_mgmt_get_boot_shandle()- Get the session handle
 * @phba: device priv structure instance
 * @s_handle: session handle returned for boot session.
 *
 * Get the boot target session handle. In case of
 * crashdump mode driver has to issue and MBX Cmd
 * for FW to login to boot target
 *
 * return
 *	Success: 0
 *	Failure: Non-Zero value
 *
 **/
int be_mgmt_get_boot_shandle(struct beiscsi_hba *phba,
			      unsigned int *s_handle)
{
	struct be_cmd_get_boot_target_resp *boot_resp;
	struct be_mcc_wrb *wrb;
	unsigned int tag, wrb_num;
	uint8_t boot_retry = 3;
	unsigned short status, extd_status;
	struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;

	do {
		/* Get the Boot Target Session Handle and Count*/
		tag = mgmt_get_boot_target(phba);
		if (!tag) {
			SE_DEBUG(DBG_LVL_1, "mgmt_get_boot_target Failed\n");
			return -EAGAIN;
		} else
			wait_event_interruptible(phba->ctrl.mcc_wait[tag],
						 phba->ctrl.mcc_numtag[tag]);

		wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
		extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
		status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
		if (status || extd_status) {
			SE_DEBUG(DBG_LVL_1, "mgmt_get_boot_target Failed"
					    " status = %d extd_status = %d\n",
					    status, extd_status);
			free_mcc_tag(&phba->ctrl, tag);
			return -EBUSY;
		}
		wrb = queue_get_wrb(mccq, wrb_num);
		free_mcc_tag(&phba->ctrl, tag);
		boot_resp = embedded_payload(wrb);

		/* Check if the there are any Boot targets configured */
		if (!boot_resp->boot_session_count) {
			SE_DEBUG(DBG_LVL_8, "No boot targets configured\n");
			return -ENXIO;
		}

		/* FW returns the session handle of the boot session */
		if (boot_resp->boot_session_handle != INVALID_SESS_HANDLE) {
			*s_handle = boot_resp->boot_session_handle;
			return 0;
		}

		/* Issue MBX Cmd to FW to login to the boot target */
		tag = mgmt_reopen_session(phba, BE_REOPEN_BOOT_SESSIONS,
					  INVALID_SESS_HANDLE);
		if (!tag) {
			SE_DEBUG(DBG_LVL_1, "mgmt_reopen_session Failed\n");
			return -EAGAIN;
		} else
			wait_event_interruptible(phba->ctrl.mcc_wait[tag],
						 phba->ctrl.mcc_numtag[tag]);

		wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
		extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
		status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
		if (status || extd_status) {
			SE_DEBUG(DBG_LVL_1, "mgmt_reopen_session Failed"
					    " status = %d extd_status = %d\n",
					    status, extd_status);
			free_mcc_tag(&phba->ctrl, tag);
			return -EBUSY;
		}
		free_mcc_tag(&phba->ctrl, tag);

	} while (--boot_retry);

	/* Couldn't log into the boot target */
	SE_DEBUG(DBG_LVL_1, "Login to Boot Target Failed\n");
	return -ENXIO;
}