scsi/be2iscsi/be_mgmt.c

/*
 * This file is part of the Emulex Linux Device Driver for Enterprise iSCSI
 * Host Bus Adapters. Refer to the README file included with this package
 * for driver version and adapter compatibility.
 *
 * Copyright (c) 2018 Broadcom. All Rights Reserved.
 * The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
 *
 * 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.
 *
 * Contact Information:
 * linux-drivers@broadcom.com
 *
 */

#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"
#include "be_main.h"

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_mcc_wrb *wrb;
	struct be_sge *mcc_sge;
	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);
	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;

	if (mutex_lock_interruptible(&ctrl->mbox_lock))
		return 0;
	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:
		beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
			    "BG_%d : Unsupported cmd = 0x%x\n\n",
			    bsg_req->rqst_data.h_vendor.vendor_cmd[0]);

		mutex_unlock(&ctrl->mbox_lock);
		return -EPERM;
	}

	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return 0;
	}

	mcc_sge = nonembedded_sgl(wrb);
	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);

	be_mcc_notify(phba, tag);

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

/**
 * mgmt_open_connection()- Establish a TCP CXN
 * @phba: driver priv structure
 * @dst_addr: Destination Address
 * @beiscsi_ep: ptr to device endpoint struct
 * @nonemb_cmd: ptr to memory allocated for command
 *
 * return
 *	Success: Tag number of the MBX Command issued
 *	Failure: Error code
 **/
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_v1 *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, ulp_num;
	unsigned short cid = beiscsi_ep->ep_cid;
	struct be_sge *sge;

	if (dst_addr->sa_family != PF_INET && dst_addr->sa_family != PF_INET6) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
			    "BG_%d : unknown addr family %d\n",
			    dst_addr->sa_family);
		return 0;
	}

	phwi_ctrlr = phba->phwi_ctrlr;
	phwi_context = phwi_ctrlr->phwi_ctxt;

	ulp_num = phwi_ctrlr->wrb_context[BE_GET_CRI_FROM_CID(cid)].ulp_num;

	def_hdr_id = (unsigned short)HWI_GET_DEF_HDRQ_ID(phba, ulp_num);
	def_data_id = (unsigned short)HWI_GET_DEF_BUFQ_ID(phba, ulp_num);

	ptemplate_address = &template_address;
	ISCSI_GET_PDU_TEMPLATE_ADDRESS(phba, ptemplate_address);
	if (mutex_lock_interruptible(&ctrl->mbox_lock))
		return 0;
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return 0;
	}

	sge = nonembedded_sgl(wrb);
	req = nonemb_cmd->va;
	memset(req, 0, sizeof(*req));

	be_wrb_hdr_prepare(wrb, nonemb_cmd->size, false, 1);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
			   OPCODE_COMMON_ISCSI_TCP_CONNECT_AND_OFFLOAD,
			   nonemb_cmd->size);
	if (dst_addr->sa_family == PF_INET) {
		__be32 s_addr = daddr_in->sin_addr.s_addr;
		req->ip_address.ip_type = BEISCSI_IP_TYPE_V4;
		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 = BEISCSI_IP_TYPE_V4;
	} else {
		/* else its PF_INET6 family */
		req->ip_address.ip_type = BEISCSI_IP_TYPE_V6;
		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 = BEISCSI_IP_TYPE_V6;
	}
	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;
	beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
		    "BG_%d : 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);

	if (!is_chip_be2_be3r(phba)) {
		req->hdr.version = MBX_CMD_VER1;
		req->tcp_window_size = 0x8000;
		req->tcp_window_scale_count = 2;
	}

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

/**
 * beiscsi_exec_nemb_cmd()- execute non-embedded MBX cmd
 * @phba: driver priv structure
 * @nonemb_cmd: DMA address of the MBX command to be issued
 * @cbfn: callback func on MCC completion
 * @resp_buf: buffer to copy the MBX cmd response
 * @resp_buf_len: response length to be copied
 *
 **/
static int beiscsi_exec_nemb_cmd(struct beiscsi_hba *phba,
				 struct be_dma_mem *nonemb_cmd,
				 void (*cbfn)(struct beiscsi_hba *,
					      unsigned int),
				 void *resp_buf, u32 resp_buf_len)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_sge *sge;
	unsigned int tag;
	int rc = 0;

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return -ENOMEM;
	}

	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(lower_32_bits(nonemb_cmd->dma));
	sge->len = cpu_to_le32(nonemb_cmd->size);

	if (cbfn) {
		struct be_dma_mem *tag_mem;

		set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
		ctrl->ptag_state[tag].cbfn = cbfn;
		tag_mem = &phba->ctrl.ptag_state[tag].tag_mem_state;

		/* store DMA mem to be freed in callback */
		tag_mem->size = nonemb_cmd->size;
		tag_mem->va = nonemb_cmd->va;
		tag_mem->dma = nonemb_cmd->dma;
	}
	be_mcc_notify(phba, tag);
	mutex_unlock(&ctrl->mbox_lock);

	/* with cbfn set, its async cmd, don't wait */
	if (cbfn)
		return 0;

	rc = beiscsi_mccq_compl_wait(phba, tag, NULL, nonemb_cmd);

	/* copy the response, if any */
	if (resp_buf)
		memcpy(resp_buf, nonemb_cmd->va, resp_buf_len);
	return rc;
}

static int beiscsi_prep_nemb_cmd(struct beiscsi_hba *phba,
				 struct be_dma_mem *cmd,
				 u8 subsystem, u8 opcode, u32 size)
{
	cmd->va = dma_alloc_coherent(&phba->ctrl.pdev->dev, size, &cmd->dma,
				     GFP_KERNEL);
	if (!cmd->va) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
			    "BG_%d : Failed to allocate memory for if info\n");
		return -ENOMEM;
	}
	cmd->size = size;
	be_cmd_hdr_prepare(cmd->va, subsystem, opcode, size);
	beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
		    "BG_%d : subsystem %u cmd %u size %u\n",
		    subsystem, opcode, size);
	return 0;
}

static void beiscsi_free_nemb_cmd(struct beiscsi_hba *phba,
				  struct be_dma_mem *cmd, int rc)
{
	/*
	 * If FW is busy the DMA buffer is saved with the tag. When the cmd
	 * completes this buffer is freed.
	 */
	if (rc == -EBUSY)
		return;

	dma_free_coherent(&phba->ctrl.pdev->dev, cmd->size, cmd->va, cmd->dma);
}

static void __beiscsi_eq_delay_compl(struct beiscsi_hba *phba, unsigned int tag)
{
	struct be_dma_mem *tag_mem;

	/* status is ignored */
	__beiscsi_mcc_compl_status(phba, tag, NULL, NULL);
	tag_mem = &phba->ctrl.ptag_state[tag].tag_mem_state;
	if (tag_mem->size) {
		dma_free_coherent(&phba->pcidev->dev, tag_mem->size,
				    tag_mem->va, tag_mem->dma);
		tag_mem->size = 0;
	}
}

int beiscsi_modify_eq_delay(struct beiscsi_hba *phba,
			    struct be_set_eqd *set_eqd, int num)
{
	struct be_cmd_req_modify_eq_delay *req;
	struct be_dma_mem nonemb_cmd;
	int i, rc;

	rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_COMMON,
			OPCODE_COMMON_MODIFY_EQ_DELAY, sizeof(*req));
	if (rc)
		return rc;

	req = nonemb_cmd.va;
	req->num_eq = cpu_to_le32(num);
	for (i = 0; i < num; i++) {
		req->delay[i].eq_id = cpu_to_le32(set_eqd[i].eq_id);
		req->delay[i].phase = 0;
		req->delay[i].delay_multiplier =
				cpu_to_le32(set_eqd[i].delay_multiplier);
	}

	rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, __beiscsi_eq_delay_compl,
				   NULL, 0);
	if (rc) {
		/*
		 * Only free on failure. Async cmds are handled like -EBUSY
		 * where it's handled for us.
		 */
		beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
	}
	return rc;
}

/**
 * beiscsi_get_initiator_name - read initiator name from flash
 * @phba: device priv structure
 * @name: buffer pointer
 * @cfg: fetch user configured
 *
 */
int beiscsi_get_initiator_name(struct beiscsi_hba *phba, char *name, bool cfg)
{
	struct be_dma_mem nonemb_cmd;
	struct be_cmd_hba_name resp;
	struct be_cmd_hba_name *req;
	int rc;

	rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI_INI,
			OPCODE_ISCSI_INI_CFG_GET_HBA_NAME, sizeof(resp));
	if (rc)
		return rc;

	req = nonemb_cmd.va;
	if (cfg)
		req->hdr.version = 1;
	rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL,
				   &resp, sizeof(resp));
	beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
	if (rc) {
		beiscsi_log(phba, KERN_ERR,
			    BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
			    "BS_%d : Initiator Name MBX Failed\n");
		return rc;
	}
	rc = sprintf(name, "%s\n", resp.initiator_name);
	return rc;
}

unsigned int beiscsi_if_get_handle(struct beiscsi_hba *phba)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_cmd_get_all_if_id_req *req;
	struct be_cmd_get_all_if_id_req *pbe_allid;
	unsigned int tag;
	int status = 0;

	if (mutex_lock_interruptible(&ctrl->mbox_lock))
		return -EINTR;
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return -ENOMEM;
	}

	req = embedded_payload(wrb);
	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));
	be_mcc_notify(phba, tag);
	mutex_unlock(&ctrl->mbox_lock);

	status = beiscsi_mccq_compl_wait(phba, tag, &wrb, NULL);
	if (status) {
		beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
			    "BG_%d : %s failed: %d\n", __func__, status);
		return -EBUSY;
	}

	pbe_allid = embedded_payload(wrb);
	/* we now support only one interface per function */
	phba->interface_handle = pbe_allid->if_hndl_list[0];

	return status;
}

static inline bool beiscsi_if_zero_ip(u8 *ip, u32 ip_type)
{
	u32 len;

	len = (ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN;
	while (len && !ip[len - 1])
		len--;
	return (len == 0);
}

static int beiscsi_if_mod_gw(struct beiscsi_hba *phba,
			     u32 action, u32 ip_type, u8 *gw)
{
	struct be_cmd_set_def_gateway_req *req;
	struct be_dma_mem nonemb_cmd;
	int rt_val;

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

	req = nonemb_cmd.va;
	req->action = action;
	req->ip_addr.ip_type = ip_type;
	memcpy(req->ip_addr.addr, gw,
	       (ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN);
	rt_val = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
	beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rt_val);
	return rt_val;
}

int beiscsi_if_set_gw(struct beiscsi_hba *phba, u32 ip_type, u8 *gw)
{
	struct be_cmd_get_def_gateway_resp gw_resp;
	int rt_val;

	memset(&gw_resp, 0, sizeof(gw_resp));
	rt_val = beiscsi_if_get_gw(phba, ip_type, &gw_resp);
	if (rt_val) {
		beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
			    "BG_%d : Failed to Get Gateway Addr\n");
		return rt_val;
	}

	if (!beiscsi_if_zero_ip(gw_resp.ip_addr.addr, ip_type)) {
		rt_val = beiscsi_if_mod_gw(phba, IP_ACTION_DEL, ip_type,
					   gw_resp.ip_addr.addr);
		if (rt_val) {
			beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
				    "BG_%d : Failed to clear Gateway Addr Set\n");
			return rt_val;
		}
	}

	rt_val = beiscsi_if_mod_gw(phba, IP_ACTION_ADD, ip_type, gw);
	if (rt_val)
		beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
			    "BG_%d : Failed to Set Gateway Addr\n");

	return rt_val;
}

int beiscsi_if_get_gw(struct beiscsi_hba *phba, u32 ip_type,
		      struct be_cmd_get_def_gateway_resp *resp)
{
	struct be_cmd_get_def_gateway_req *req;
	struct be_dma_mem nonemb_cmd;
	int rc;

	rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
			OPCODE_COMMON_ISCSI_NTWK_GET_DEFAULT_GATEWAY,
			sizeof(*resp));
	if (rc)
		return rc;

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

	rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, resp,
				   sizeof(*resp));
	beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
	return rc;
}

static int
beiscsi_if_clr_ip(struct beiscsi_hba *phba,
		  struct be_cmd_get_if_info_resp *if_info)
{
	struct be_cmd_set_ip_addr_req *req;
	struct be_dma_mem nonemb_cmd;
	int rc;

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

	req = nonemb_cmd.va;
	req->ip_params.record_entry_count = 1;
	req->ip_params.ip_record.action = IP_ACTION_DEL;
	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 = if_info->ip_addr.ip_type;
	memcpy(req->ip_params.ip_record.ip_addr.addr,
	       if_info->ip_addr.addr,
	       sizeof(if_info->ip_addr.addr));
	memcpy(req->ip_params.ip_record.ip_addr.subnet_mask,
	       if_info->ip_addr.subnet_mask,
	       sizeof(if_info->ip_addr.subnet_mask));
	rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
	if (rc < 0 || req->ip_params.ip_record.status) {
		beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
			    "BG_%d : failed to clear IP: rc %d status %d\n",
			    rc, req->ip_params.ip_record.status);
	}
	beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
	return rc;
}

static int
beiscsi_if_set_ip(struct beiscsi_hba *phba, u8 *ip,
		  u8 *subnet, u32 ip_type)
{
	struct be_cmd_set_ip_addr_req *req;
	struct be_dma_mem nonemb_cmd;
	uint32_t ip_len;
	int rc;

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

	req = nonemb_cmd.va;
	req->ip_params.record_entry_count = 1;
	req->ip_params.ip_record.action = IP_ACTION_ADD;
	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;
	ip_len = (ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN;
	memcpy(req->ip_params.ip_record.ip_addr.addr, ip, ip_len);
	if (subnet)
		memcpy(req->ip_params.ip_record.ip_addr.subnet_mask,
		       subnet, ip_len);

	rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
	/**
	 * In some cases, host needs to look into individual record status
	 * even though FW reported success for that IOCTL.
	 */
	if (rc < 0 || req->ip_params.ip_record.status) {
		__beiscsi_log(phba, KERN_ERR,
			    "BG_%d : failed to set IP: rc %d status %d\n",
			    rc, req->ip_params.ip_record.status);
		if (req->ip_params.ip_record.status)
			rc = -EINVAL;
	}
	beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
	return rc;
}

int beiscsi_if_en_static(struct beiscsi_hba *phba, u32 ip_type,
			 u8 *ip, u8 *subnet)
{
	struct be_cmd_get_if_info_resp *if_info;
	struct be_cmd_rel_dhcp_req *reldhcp;
	struct be_dma_mem nonemb_cmd;
	int rc;

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

	if (if_info->dhcp_state) {
		rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd,
				CMD_SUBSYSTEM_ISCSI,
				OPCODE_COMMON_ISCSI_NTWK_REL_STATELESS_IP_ADDR,
				sizeof(*reldhcp));
		if (rc)
			goto exit;

		reldhcp = nonemb_cmd.va;
		reldhcp->interface_hndl = phba->interface_handle;
		reldhcp->ip_type = ip_type;
		rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
		beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
		if (rc < 0) {
			beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
				    "BG_%d : failed to release existing DHCP: %d\n",
				    rc);
			goto exit;
		}
	}

	/* first delete any IP set */
	if (!beiscsi_if_zero_ip(if_info->ip_addr.addr, ip_type)) {
		rc = beiscsi_if_clr_ip(phba, if_info);
		if (rc)
			goto exit;
	}

	/* if ip == NULL then this is called just to release DHCP IP */
	if (ip)
		rc = beiscsi_if_set_ip(phba, ip, subnet, ip_type);
exit:
	kfree(if_info);
	return rc;
}

int beiscsi_if_en_dhcp(struct beiscsi_hba *phba, u32 ip_type)
{
	struct be_cmd_get_def_gateway_resp gw_resp;
	struct be_cmd_get_if_info_resp *if_info;
	struct be_cmd_set_dhcp_req *dhcpreq;
	struct be_dma_mem nonemb_cmd;
	u8 *gw;
	int rc;

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

	if (if_info->dhcp_state) {
		beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
				"BG_%d : DHCP Already Enabled\n");
		goto exit;
	}

	/* first delete any IP set */
	if (!beiscsi_if_zero_ip(if_info->ip_addr.addr, ip_type)) {
		rc = beiscsi_if_clr_ip(phba, if_info);
		if (rc)
			goto exit;
	}

	/* delete gateway settings if mode change is to DHCP */
	memset(&gw_resp, 0, sizeof(gw_resp));
	/* use ip_type provided in if_info */
	rc = beiscsi_if_get_gw(phba, if_info->ip_addr.ip_type, &gw_resp);
	if (rc) {
		beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
			    "BG_%d : Failed to Get Gateway Addr\n");
		goto exit;
	}
	gw = (u8 *)&gw_resp.ip_addr.addr;
	if (!beiscsi_if_zero_ip(gw, if_info->ip_addr.ip_type)) {
		rc = beiscsi_if_mod_gw(phba, IP_ACTION_DEL,
				       if_info->ip_addr.ip_type, gw);
		if (rc) {
			beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
				    "BG_%d : Failed to clear Gateway Addr Set\n");
			goto exit;
		}
	}

	rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
			OPCODE_COMMON_ISCSI_NTWK_CONFIG_STATELESS_IP_ADDR,
			sizeof(*dhcpreq));
	if (rc)
		goto exit;

	dhcpreq = nonemb_cmd.va;
	dhcpreq->flags = 1; /* 1 - blocking; 0 - non-blocking */
	dhcpreq->retry_count = 1;
	dhcpreq->interface_hndl = phba->interface_handle;
	dhcpreq->ip_type = ip_type;
	rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
	beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
exit:
	kfree(if_info);
	return rc;
}

/**
 * beiscsi_if_set_vlan()- Issue and wait for CMD completion
 * @phba: device private structure instance
 * @vlan_tag: VLAN tag
 *
 * Issue the MBX Cmd and wait for the completion of the
 * command.
 *
 * returns
 *	Success: 0
 *	Failure: Non-Xero Value
 **/
int beiscsi_if_set_vlan(struct beiscsi_hba *phba, uint16_t vlan_tag)
{
	int rc;
	unsigned int tag;

	tag = be_cmd_set_vlan(phba, vlan_tag);
	if (!tag) {
		beiscsi_log(phba, KERN_ERR,
			    (BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX),
			    "BG_%d : VLAN Setting Failed\n");
		return -EBUSY;
	}

	rc = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
	if (rc) {
		beiscsi_log(phba, KERN_ERR,
			    (BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX),
			    "BS_%d : VLAN MBX Cmd Failed\n");
		return rc;
	}
	return rc;
}


int beiscsi_if_get_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;
	uint32_t ioctl_size = sizeof(struct be_cmd_get_if_info_resp);
	int rc;

	rc = beiscsi_if_get_handle(phba);
	if (rc)
		return rc;

	do {
		rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd,
				CMD_SUBSYSTEM_ISCSI,
				OPCODE_COMMON_ISCSI_NTWK_GET_IF_INFO,
				ioctl_size);
		if (rc)
			return rc;

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

		/* Allocate memory for if_info */
		*if_info = kzalloc(ioctl_size, GFP_KERNEL);
		if (!*if_info) {
			beiscsi_log(phba, KERN_ERR,
				    BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
				    "BG_%d : Memory Allocation Failure\n");

				beiscsi_free_nemb_cmd(phba, &nonemb_cmd,
						      -ENOMEM);
				return -ENOMEM;
		}

		rc =  beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, *if_info,
					    ioctl_size);

		/* Check if the error is because of Insufficent_Buffer */
		if (rc == -EAGAIN) {

			/* Get the new memory size */
			ioctl_size = ((struct be_cmd_resp_hdr *)
				      nonemb_cmd.va)->actual_resp_len;
			ioctl_size += sizeof(struct be_cmd_req_hdr);

			beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
			/* Free the virtual memory */
			kfree(*if_info);
		} else {
			beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
			break;
		}
	} while (true);
	return rc;
}

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

	rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, nic, sizeof(*nic));
	beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
	return rc;
}

static void beiscsi_boot_process_compl(struct beiscsi_hba *phba,
				       unsigned int tag)
{
	struct be_cmd_get_boot_target_resp *boot_resp;
	struct be_cmd_resp_logout_fw_sess *logo_resp;
	struct be_cmd_get_session_resp *sess_resp;
	struct be_mcc_wrb *wrb;
	struct boot_struct *bs;
	int boot_work, status;

	if (!test_bit(BEISCSI_HBA_BOOT_WORK, &phba->state)) {
		__beiscsi_log(phba, KERN_ERR,
			      "BG_%d : %s no boot work %lx\n",
			      __func__, phba->state);
		return;
	}

	if (phba->boot_struct.tag != tag) {
		__beiscsi_log(phba, KERN_ERR,
			      "BG_%d : %s tag mismatch %d:%d\n",
			      __func__, tag, phba->boot_struct.tag);
		return;
	}
	bs = &phba->boot_struct;
	boot_work = 1;
	status = 0;
	switch (bs->action) {
	case BEISCSI_BOOT_REOPEN_SESS:
		status = __beiscsi_mcc_compl_status(phba, tag, NULL, NULL);
		if (!status)
			bs->action = BEISCSI_BOOT_GET_SHANDLE;
		else
			bs->retry--;
		break;
	case BEISCSI_BOOT_GET_SHANDLE:
		status = __beiscsi_mcc_compl_status(phba, tag, &wrb, NULL);
		if (!status) {
			boot_resp = embedded_payload(wrb);
			bs->s_handle = boot_resp->boot_session_handle;
		}
		if (bs->s_handle == BE_BOOT_INVALID_SHANDLE) {
			bs->action = BEISCSI_BOOT_REOPEN_SESS;
			bs->retry--;
		} else {
			bs->action = BEISCSI_BOOT_GET_SINFO;
		}
		break;
	case BEISCSI_BOOT_GET_SINFO:
		status = __beiscsi_mcc_compl_status(phba, tag, NULL,
						    &bs->nonemb_cmd);
		if (!status) {
			sess_resp = bs->nonemb_cmd.va;
			memcpy(&bs->boot_sess, &sess_resp->session_info,
			       sizeof(struct mgmt_session_info));
			bs->action = BEISCSI_BOOT_LOGOUT_SESS;
		} else {
			__beiscsi_log(phba, KERN_ERR,
				      "BG_%d : get boot session info error : 0x%x\n",
				      status);
			boot_work = 0;
		}
		dma_free_coherent(&phba->ctrl.pdev->dev, bs->nonemb_cmd.size,
				    bs->nonemb_cmd.va, bs->nonemb_cmd.dma);
		bs->nonemb_cmd.va = NULL;
		break;
	case BEISCSI_BOOT_LOGOUT_SESS:
		status = __beiscsi_mcc_compl_status(phba, tag, &wrb, NULL);
		if (!status) {
			logo_resp = embedded_payload(wrb);
			if (logo_resp->session_status != BE_SESS_STATUS_CLOSE) {
				__beiscsi_log(phba, KERN_ERR,
					      "BG_%d : FW boot session logout error : 0x%x\n",
					      logo_resp->session_status);
			}
		}
		/* continue to create boot_kset even if logout failed? */
		bs->action = BEISCSI_BOOT_CREATE_KSET;
		break;
	default:
		break;
	}

	/* clear the tag so no other completion matches this tag */
	bs->tag = 0;
	if (!bs->retry) {
		boot_work = 0;
		__beiscsi_log(phba, KERN_ERR,
			      "BG_%d : failed to setup boot target: status %d action %d\n",
			      status, bs->action);
	}
	if (!boot_work) {
		/* wait for next event to start boot_work */
		clear_bit(BEISCSI_HBA_BOOT_WORK, &phba->state);
		return;
	}
	schedule_work(&phba->boot_work);
}

/**
 * beiscsi_boot_logout_sess()- Logout from boot FW session
 * @phba: Device priv structure instance
 *
 * return
 *	the TAG used for MBOX Command
 *
 */
unsigned int beiscsi_boot_logout_sess(struct beiscsi_hba *phba)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_cmd_req_logout_fw_sess *req;
	unsigned int tag;

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return 0;
	}

	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_SESSION_LOGOUT_TARGET,
			   sizeof(struct be_cmd_req_logout_fw_sess));
	/* Use the session handle copied into boot_sess */
	req->session_handle = phba->boot_struct.boot_sess.session_handle;

	phba->boot_struct.tag = tag;
	set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
	ctrl->ptag_state[tag].cbfn = beiscsi_boot_process_compl;

	be_mcc_notify(phba, tag);
	mutex_unlock(&ctrl->mbox_lock);

	return tag;
}
/**
 * beiscsi_boot_reopen_sess()- Reopen boot session
 * @phba: Device priv structure instance
 *
 * return
 *	the TAG used for MBOX Command
 *
 **/
unsigned int beiscsi_boot_reopen_sess(struct beiscsi_hba *phba)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_cmd_reopen_session_req *req;
	unsigned int tag;

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return 0;
	}

	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_REOPEN_ALL_SESSIONS,
			   sizeof(struct be_cmd_reopen_session_resp));
	req->reopen_type = BE_REOPEN_BOOT_SESSIONS;
	req->session_handle = BE_BOOT_INVALID_SHANDLE;

	phba->boot_struct.tag = tag;
	set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
	ctrl->ptag_state[tag].cbfn = beiscsi_boot_process_compl;

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


/**
 * beiscsi_boot_get_sinfo()- Get boot session info
 * @phba: device priv structure instance
 *
 * Fetches the boot_struct.s_handle info from FW.
 * return
 *	the TAG used for MBOX Command
 *
 **/
unsigned int beiscsi_boot_get_sinfo(struct beiscsi_hba *phba)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_cmd_get_session_req *req;
	struct be_dma_mem *nonemb_cmd;
	struct be_mcc_wrb *wrb;
	struct be_sge *sge;
	unsigned int tag;

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return 0;
	}

	nonemb_cmd = &phba->boot_struct.nonemb_cmd;
	nonemb_cmd->size = sizeof(struct be_cmd_get_session_resp);
	nonemb_cmd->va = dma_alloc_coherent(&phba->ctrl.pdev->dev,
					      nonemb_cmd->size,
					      &nonemb_cmd->dma,
					      GFP_KERNEL);
	if (!nonemb_cmd->va) {
		mutex_unlock(&ctrl->mbox_lock);
		return 0;
	}

	req = nonemb_cmd->va;
	memset(req, 0, sizeof(*req));
	sge = nonembedded_sgl(wrb);
	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(struct be_cmd_get_session_resp));
	req->session_handle = phba->boot_struct.s_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);

	phba->boot_struct.tag = tag;
	set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
	ctrl->ptag_state[tag].cbfn = beiscsi_boot_process_compl;

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

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

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return 0;
	}

	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_BOOT_GET_BOOT_TARGET,
			   sizeof(struct be_cmd_get_boot_target_resp));

	if (async) {
		phba->boot_struct.tag = tag;
		set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
		ctrl->ptag_state[tag].cbfn = beiscsi_boot_process_compl;
	}

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

/**
 * beiscsi_boot_get_shandle()- Get boot session handle
 * @phba: device priv structure instance
 * @s_handle: session handle returned for boot session.
 *
 * return
 *	Success: 1
 *	Failure: negative
 *
 **/
int beiscsi_boot_get_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;
	int rc;

	*s_handle = BE_BOOT_INVALID_SHANDLE;
	/* get configured boot session count and handle */
	tag = __beiscsi_boot_get_shandle(phba, 0);
	if (!tag) {
		beiscsi_log(phba, KERN_ERR,
			    BEISCSI_LOG_CONFIG | BEISCSI_LOG_INIT,
			    "BG_%d : Getting Boot Target Info Failed\n");
		return -EAGAIN;
	}

	rc = beiscsi_mccq_compl_wait(phba, tag, &wrb, NULL);
	if (rc) {
		beiscsi_log(phba, KERN_ERR,
			    BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
			    "BG_%d : MBX CMD get_boot_target Failed\n");
		return -EBUSY;
	}

	boot_resp = embedded_payload(wrb);
	/* check if there are any boot targets configured */
	if (!boot_resp->boot_session_count) {
		__beiscsi_log(phba, KERN_INFO,
			      "BG_%d : No boot targets configured\n");
		return -ENXIO;
	}

	/* only if FW has logged in to the boot target, s_handle is valid */
	*s_handle = boot_resp->boot_session_handle;
	return 1;
}

/**
 * beiscsi_drvr_ver_disp()- Display the driver Name and Version
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text driver name and version
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_drvr_ver_disp(struct device *dev, struct device_attribute *attr,
		       char *buf)
{
	return snprintf(buf, PAGE_SIZE, BE_NAME "\n");
}

/**
 * beiscsi_fw_ver_disp()- Display Firmware Version
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text Firmware version
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_fw_ver_disp(struct device *dev, struct device_attribute *attr,
		     char *buf)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct beiscsi_hba *phba = iscsi_host_priv(shost);

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

/**
 * beiscsi_active_session_disp()- Display Sessions Active
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text Session Count
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_active_session_disp(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct beiscsi_hba *phba = iscsi_host_priv(shost);
	uint16_t avlbl_cids = 0, ulp_num, len = 0, total_cids = 0;

	for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++) {
		if (test_bit(ulp_num, (void *)&phba->fw_config.ulp_supported)) {
			avlbl_cids = BEISCSI_ULP_AVLBL_CID(phba, ulp_num);
			total_cids = BEISCSI_GET_CID_COUNT(phba, ulp_num);
			len += scnprintf(buf+len, PAGE_SIZE - len,
					 "ULP%d : %d\n", ulp_num,
					 (total_cids - avlbl_cids));
		} else
			len += scnprintf(buf+len, PAGE_SIZE - len,
					 "ULP%d : %d\n", ulp_num, 0);
	}

	return len;
}

/**
 * beiscsi_free_session_disp()- Display Avaliable Session
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text Session Count
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_free_session_disp(struct device *dev, struct device_attribute *attr,
		       char *buf)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct beiscsi_hba *phba = iscsi_host_priv(shost);
	uint16_t ulp_num, len = 0;

	for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++) {
		if (test_bit(ulp_num, (void *)&phba->fw_config.ulp_supported))
			len += scnprintf(buf+len, PAGE_SIZE - len,
					 "ULP%d : %d\n", ulp_num,
					 BEISCSI_ULP_AVLBL_CID(phba, ulp_num));
		else
			len += scnprintf(buf+len, PAGE_SIZE - len,
					 "ULP%d : %d\n", ulp_num, 0);
	}

	return len;
}

/**
 * beiscsi_adap_family_disp()- Display adapter family.
 * @dev: ptr to device to get priv structure
 * @attr: device attribute, not used.
 * @buf: contains formatted text driver name and version
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_adap_family_disp(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	uint16_t dev_id = 0;
	struct Scsi_Host *shost = class_to_shost(dev);
	struct beiscsi_hba *phba = iscsi_host_priv(shost);

	dev_id = phba->pcidev->device;
	switch (dev_id) {
	case BE_DEVICE_ID1:
	case OC_DEVICE_ID1:
	case OC_DEVICE_ID2:
		return snprintf(buf, PAGE_SIZE,
				"Obsolete/Unsupported BE2 Adapter Family\n");
	case BE_DEVICE_ID2:
	case OC_DEVICE_ID3:
		return snprintf(buf, PAGE_SIZE, "BE3-R Adapter Family\n");
	case OC_SKH_ID1:
		return snprintf(buf, PAGE_SIZE, "Skyhawk-R Adapter Family\n");
	default:
		return snprintf(buf, PAGE_SIZE,
				"Unknown Adapter Family: 0x%x\n", dev_id);
	}
}

/**
 * beiscsi_phys_port_disp()- Display Physical Port Identifier
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text port identifier
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_phys_port_disp(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct beiscsi_hba *phba = iscsi_host_priv(shost);

	return snprintf(buf, PAGE_SIZE, "Port Identifier : %u\n",
			phba->fw_config.phys_port);
}

void beiscsi_offload_cxn_v0(struct beiscsi_offload_params *params,
			     struct wrb_handle *pwrb_handle,
			     struct be_mem_descriptor *mem_descr,
			     struct hwi_wrb_context *pwrb_context)
{
	struct iscsi_wrb *pwrb = pwrb_handle->pwrb;

	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
		      max_send_data_segment_length, pwrb,
		      params->dw[offsetof(struct amap_beiscsi_offload_params,
		      max_send_data_segment_length) / 32]);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, type, pwrb,
		      BE_TGT_CTX_UPDT_CMD);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
		      first_burst_length,
		      pwrb,
		      params->dw[offsetof(struct amap_beiscsi_offload_params,
		      first_burst_length) / 32]);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, erl, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      erl) / 32] & OFFLD_PARAMS_ERL));
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, dde, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		       dde) / 32] & OFFLD_PARAMS_DDE) >> 2);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, hde, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      hde) / 32] & OFFLD_PARAMS_HDE) >> 3);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, ir2t, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      ir2t) / 32] & OFFLD_PARAMS_IR2T) >> 4);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, imd, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      imd) / 32] & OFFLD_PARAMS_IMD) >> 5);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, stat_sn,
		      pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      exp_statsn) / 32] + 1));
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, wrb_idx,
		      pwrb, pwrb_handle->wrb_index);

	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
		      max_burst_length, pwrb, params->dw[offsetof
		      (struct amap_beiscsi_offload_params,
		      max_burst_length) / 32]);

	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, ptr2nextwrb,
		      pwrb, pwrb_handle->wrb_index);
	if (pwrb_context->plast_wrb)
		AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
			      ptr2nextwrb,
			      pwrb_context->plast_wrb,
			      pwrb_handle->wrb_index);
	pwrb_context->plast_wrb = pwrb;

	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
		      session_state, pwrb, 0);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, compltonack,
		      pwrb, 1);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, notpredblq,
		      pwrb, 0);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, mode, pwrb,
		      0);

	mem_descr += ISCSI_MEM_GLOBAL_HEADER;
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
		      pad_buffer_addr_hi, pwrb,
		      mem_descr->mem_array[0].bus_address.u.a32.address_hi);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
		      pad_buffer_addr_lo, pwrb,
		      mem_descr->mem_array[0].bus_address.u.a32.address_lo);
}

void beiscsi_offload_cxn_v2(struct beiscsi_offload_params *params,
			     struct wrb_handle *pwrb_handle,
			     struct hwi_wrb_context *pwrb_context)
{
	struct iscsi_wrb *pwrb = pwrb_handle->pwrb;

	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      max_burst_length, pwrb, params->dw[offsetof
		      (struct amap_beiscsi_offload_params,
		      max_burst_length) / 32]);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      type, pwrb,
		      BE_TGT_CTX_UPDT_CMD);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      ptr2nextwrb,
		      pwrb, pwrb_handle->wrb_index);
	if (pwrb_context->plast_wrb)
		AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
			      ptr2nextwrb,
			      pwrb_context->plast_wrb,
			      pwrb_handle->wrb_index);
	pwrb_context->plast_wrb = pwrb;

	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, wrb_idx,
		      pwrb, pwrb_handle->wrb_index);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      max_send_data_segment_length, pwrb,
		      params->dw[offsetof(struct amap_beiscsi_offload_params,
		      max_send_data_segment_length) / 32]);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      first_burst_length, pwrb,
		      params->dw[offsetof(struct amap_beiscsi_offload_params,
		      first_burst_length) / 32]);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      max_recv_dataseg_len, pwrb,
		      params->dw[offsetof(struct amap_beiscsi_offload_params,
		      max_recv_data_segment_length) / 32]);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      max_cxns, pwrb, BEISCSI_MAX_CXNS);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, erl, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      erl) / 32] & OFFLD_PARAMS_ERL));
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, dde, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      dde) / 32] & OFFLD_PARAMS_DDE) >> 2);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, hde, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      hde) / 32] & OFFLD_PARAMS_HDE) >> 3);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      ir2t, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      ir2t) / 32] & OFFLD_PARAMS_IR2T) >> 4);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, imd, pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      imd) / 32] & OFFLD_PARAMS_IMD) >> 5);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      data_seq_inorder,
		      pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      data_seq_inorder) / 32] &
		      OFFLD_PARAMS_DATA_SEQ_INORDER) >> 6);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
		      pdu_seq_inorder,
		      pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      pdu_seq_inorder) / 32] &
		      OFFLD_PARAMS_PDU_SEQ_INORDER) >> 7);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, max_r2t,
		      pwrb,
		      (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      max_r2t) / 32] &
		      OFFLD_PARAMS_MAX_R2T) >> 8);
	AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, stat_sn,
		      pwrb,
		     (params->dw[offsetof(struct amap_beiscsi_offload_params,
		      exp_statsn) / 32] + 1));
}

unsigned int beiscsi_invalidate_cxn(struct beiscsi_hba *phba,
				    struct beiscsi_endpoint *beiscsi_ep)
{
	struct be_invalidate_connection_params_in *req;
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	unsigned int tag = 0;

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return 0;
	}

	req = embedded_payload(wrb);
	be_wrb_hdr_prepare(wrb, sizeof(union be_invalidate_connection_params),
			   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 = beiscsi_ep->ep_cid;
	if (beiscsi_ep->conn)
		req->cleanup_type = BE_CLEANUP_TYPE_INVALIDATE;
	else
		req->cleanup_type = BE_CLEANUP_TYPE_ISSUE_TCP_RST;
	/**
	 * 0 - non-persistent targets
	 * 1 - save session info on flash
	 */
	req->save_cfg = 0;
	be_mcc_notify(phba, tag);
	mutex_unlock(&ctrl->mbox_lock);
	return tag;
}

unsigned int beiscsi_upload_cxn(struct beiscsi_hba *phba,
				struct beiscsi_endpoint *beiscsi_ep)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_tcp_upload_params_in *req;
	unsigned int tag;

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		return 0;
	}

	req = embedded_payload(wrb);
	be_wrb_hdr_prepare(wrb, sizeof(union be_tcp_upload_params), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_COMMON_TCP_UPLOAD,
			   OPCODE_COMMON_TCP_UPLOAD, sizeof(*req));
	req->id = beiscsi_ep->ep_cid;
	if (beiscsi_ep->conn)
		req->upload_type = BE_UPLOAD_TYPE_GRACEFUL;
	else
		req->upload_type = BE_UPLOAD_TYPE_ABORT;
	be_mcc_notify(phba, tag);
	mutex_unlock(&ctrl->mbox_lock);
	return tag;
}

int beiscsi_mgmt_invalidate_icds(struct beiscsi_hba *phba,
				 struct invldt_cmd_tbl *inv_tbl,
				 unsigned int nents)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct invldt_cmds_params_in *req;
	struct be_dma_mem nonemb_cmd;
	struct be_mcc_wrb *wrb;
	unsigned int i, tag;
	struct be_sge *sge;
	int rc;

	if (!nents || nents > BE_INVLDT_CMD_TBL_SZ)
		return -EINVAL;

	nonemb_cmd.size = sizeof(union be_invldt_cmds_params);
	nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev,
					   nonemb_cmd.size, &nonemb_cmd.dma,
					   GFP_KERNEL);
	if (!nonemb_cmd.va) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_EH,
			    "BM_%d : invldt_cmds_params alloc failed\n");
		return -ENOMEM;
	}

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
				    nonemb_cmd.va, nonemb_cmd.dma);
		return -ENOMEM;
	}

	req = nonemb_cmd.va;
	be_wrb_hdr_prepare(wrb, nonemb_cmd.size, 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 < nents; i++) {
		req->table[i].icd = inv_tbl[i].icd;
		req->table[i].cid = inv_tbl[i].cid;
		req->icd_count++;
	}
	sge = nonembedded_sgl(wrb);
	sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd.dma));
	sge->pa_lo = cpu_to_le32(lower_32_bits(nonemb_cmd.dma));
	sge->len = cpu_to_le32(nonemb_cmd.size);

	be_mcc_notify(phba, tag);
	mutex_unlock(&ctrl->mbox_lock);

	rc = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
	if (rc != -EBUSY)
		dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
				    nonemb_cmd.va, nonemb_cmd.dma);
	return rc;
}