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1/* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver.2 *3 * Copyright (c) 2006 - 2013 Broadcom Corporation4 * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.5 * Copyright (c) 2007, 2008 Mike Christie6 * Copyright (c) 2014, QLogic Corporation7 *8 * This program is free software; you can redistribute it and/or modify9 * it under the terms of the GNU General Public License as published by10 * the Free Software Foundation.11 *12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)13 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)14 * Maintained by: QLogic-Storage-Upstream@qlogic.com15 */16 17#include <linux/gfp.h>18#include <scsi/scsi_tcq.h>19#include <scsi/libiscsi.h>20#include "bnx2i.h"21 22DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);23 24/**25 * bnx2i_get_cid_num - get cid from ep26 * @ep: 	endpoint pointer27 *28 * Only applicable to 57710 family of devices29 */30static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)31{32	u32 cid;33 34	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))35		cid = ep->ep_cid;36	else37		cid = GET_CID_NUM(ep->ep_cid);38	return cid;39}40 41 42/**43 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type44 * @hba: 		Adapter for which adjustments is to be made45 *46 * Only applicable to 57710 family of devices47 */48static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)49{50	u32 num_elements_per_pg;51 52	if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||53	    test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||54	    test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {55		if (!is_power_of_2(hba->max_sqes))56			hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);57 58		if (!is_power_of_2(hba->max_rqes))59			hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);60	}61 62	/* Adjust each queue size if the user selection does not63	 * yield integral num of page buffers64	 */65	/* adjust SQ */66	num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;67	if (hba->max_sqes < num_elements_per_pg)68		hba->max_sqes = num_elements_per_pg;69	else if (hba->max_sqes % num_elements_per_pg)70		hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &71				 ~(num_elements_per_pg - 1);72 73	/* adjust CQ */74	num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE;75	if (hba->max_cqes < num_elements_per_pg)76		hba->max_cqes = num_elements_per_pg;77	else if (hba->max_cqes % num_elements_per_pg)78		hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &79				 ~(num_elements_per_pg - 1);80 81	/* adjust RQ */82	num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE;83	if (hba->max_rqes < num_elements_per_pg)84		hba->max_rqes = num_elements_per_pg;85	else if (hba->max_rqes % num_elements_per_pg)86		hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &87				 ~(num_elements_per_pg - 1);88}89 90 91/**92 * bnx2i_get_link_state - get network interface link state93 * @hba:	adapter instance pointer94 *95 * updates adapter structure flag based on netdev state96 */97static void bnx2i_get_link_state(struct bnx2i_hba *hba)98{99	if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))100		set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);101	else102		clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);103}104 105 106/**107 * bnx2i_iscsi_license_error - displays iscsi license related error message108 * @hba:		adapter instance pointer109 * @error_code:		error classification110 *111 * Puts out an error log when driver is unable to offload iscsi connection112 *	due to license restrictions113 */114static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)115{116	if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)117		/* iSCSI offload not supported on this device */118		printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",119				hba->netdev->name);120	if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)121		/* iSCSI offload not supported on this LOM device */122		printk(KERN_ERR "bnx2i: LOM is not enable to "123				"offload iSCSI connections, dev=%s\n",124				hba->netdev->name);125	set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);126}127 128 129/**130 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification131 * @ep:		endpoint (transport identifier) structure132 * @action:	action, ARM or DISARM. For now only ARM_CQE is used133 *134 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt135 *	the driver. EQ event is generated CQ index is hit or at least 1 CQ is136 *	outstanding and on chip timer expires137 */138int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)139{140	struct bnx2i_5771x_cq_db *cq_db;141	u16 cq_index;142	u16 next_index = 0;143	u32 num_active_cmds;144 145	/* Coalesce CQ entries only on 10G devices */146	if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))147		return 0;148 149	/* Do not update CQ DB multiple times before firmware writes150	 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious151	 * interrupts and other unwanted results152	 */153	cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;154 155	if (action != CNIC_ARM_CQE_FP)156		if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)157			return 0;158 159	if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {160		num_active_cmds = atomic_read(&ep->num_active_cmds);161		if (num_active_cmds <= event_coal_min)162			next_index = 1;163		else {164			next_index = num_active_cmds >> ep->ec_shift;165			if (next_index > num_active_cmds - event_coal_min)166				next_index = num_active_cmds - event_coal_min;167		}168		if (!next_index)169			next_index = 1;170		cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;171		if (cq_index > ep->qp.cqe_size * 2)172			cq_index -= ep->qp.cqe_size * 2;173		if (!cq_index)174			cq_index = 1;175 176		cq_db->sqn[0] = cq_index;177	}178	return next_index;179}180 181 182/**183 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer184 * @bnx2i_conn:		iscsi connection on which RQ event occurred185 * @ptr:		driver buffer to which RQ buffer contents is to186 *			be copied187 * @len:		length of valid data inside RQ buf188 *189 * Copies RQ buffer contents from shared (DMA'able) memory region to190 *	driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and191 *	scsi sense info192 */193void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)194{195	if (!bnx2i_conn->ep->qp.rqe_left)196		return;197 198	bnx2i_conn->ep->qp.rqe_left--;199	memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);200	if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {201		bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;202		bnx2i_conn->ep->qp.rq_cons_idx = 0;203	} else {204		bnx2i_conn->ep->qp.rq_cons_qe++;205		bnx2i_conn->ep->qp.rq_cons_idx++;206	}207}208 209 210static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)211{212	struct bnx2i_5771x_dbell dbell;213	u32 msg;214 215	memset(&dbell, 0, sizeof(dbell));216	dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<217			      B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);218	msg = *((u32 *)&dbell);219	/* TODO : get doorbell register mapping */220	writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);221}222 223 224/**225 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell226 * @bnx2i_conn:	iscsi connection on which event to post227 * @count:	number of RQ buffer being posted to chip228 *229 * No need to ring hardware doorbell for 57710 family of devices230 */231void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)232{233	struct bnx2i_5771x_sq_rq_db *rq_db;234	u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);235	struct bnx2i_endpoint *ep = bnx2i_conn->ep;236 237	ep->qp.rqe_left += count;238	ep->qp.rq_prod_idx &= 0x7FFF;239	ep->qp.rq_prod_idx += count;240 241	if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {242		ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;243		if (!hi_bit)244			ep->qp.rq_prod_idx |= 0x8000;245	} else246		ep->qp.rq_prod_idx |= hi_bit;247 248	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {249		rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;250		rq_db->prod_idx = ep->qp.rq_prod_idx;251		/* no need to ring hardware doorbell for 57710 */252	} else {253		writew(ep->qp.rq_prod_idx,254		       ep->qp.ctx_base + CNIC_RECV_DOORBELL);255	}256}257 258 259/**260 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine261 * @bnx2i_conn:		iscsi connection to which new SQ entries belong262 * @count: 		number of SQ WQEs to post263 *264 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family265 *	of devices. For 5706/5708/5709 new SQ WQE count is written into the266 *	doorbell register267 */268static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)269{270	struct bnx2i_5771x_sq_rq_db *sq_db;271	struct bnx2i_endpoint *ep = bnx2i_conn->ep;272 273	atomic_inc(&ep->num_active_cmds);274	wmb();	/* flush SQ WQE memory before the doorbell is rung */275	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {276		sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;277		sq_db->prod_idx = ep->qp.sq_prod_idx;278		bnx2i_ring_577xx_doorbell(bnx2i_conn);279	} else280		writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);281}282 283 284/**285 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters286 * @bnx2i_conn:	iscsi connection to which new SQ entries belong287 * @count:	number of SQ WQEs to post288 *289 * this routine will update SQ driver parameters and ring the doorbell290 */291static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,292					      int count)293{294	int tmp_cnt;295 296	if (count == 1) {297		if (bnx2i_conn->ep->qp.sq_prod_qe ==298		    bnx2i_conn->ep->qp.sq_last_qe)299			bnx2i_conn->ep->qp.sq_prod_qe =300						bnx2i_conn->ep->qp.sq_first_qe;301		else302			bnx2i_conn->ep->qp.sq_prod_qe++;303	} else {304		if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=305		    bnx2i_conn->ep->qp.sq_last_qe)306			bnx2i_conn->ep->qp.sq_prod_qe += count;307		else {308			tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -309				bnx2i_conn->ep->qp.sq_prod_qe;310			bnx2i_conn->ep->qp.sq_prod_qe =311				&bnx2i_conn->ep->qp.sq_first_qe[count -312								(tmp_cnt + 1)];313		}314	}315	bnx2i_conn->ep->qp.sq_prod_idx += count;316	/* Ring the doorbell */317	bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);318}319 320 321/**322 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware323 * @bnx2i_conn:	iscsi connection324 * @task: transport layer's command structure pointer which is requesting325 *	  a WQE to sent to chip for further processing326 *327 * prepare and post an iSCSI Login request WQE to CNIC firmware328 */329int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,330			   struct iscsi_task *task)331{332	struct bnx2i_login_request *login_wqe;333	struct iscsi_login_req *login_hdr;334	u32 dword;335 336	login_hdr = (struct iscsi_login_req *)task->hdr;337	login_wqe = (struct bnx2i_login_request *)338						bnx2i_conn->ep->qp.sq_prod_qe;339 340	login_wqe->op_code = login_hdr->opcode;341	login_wqe->op_attr = login_hdr->flags;342	login_wqe->version_max = login_hdr->max_version;343	login_wqe->version_min = login_hdr->min_version;344	login_wqe->data_length = ntoh24(login_hdr->dlength);345	login_wqe->isid_lo = *((u32 *) login_hdr->isid);346	login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);347	login_wqe->tsih = login_hdr->tsih;348	login_wqe->itt = task->itt |349		(ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);350	login_wqe->cid = login_hdr->cid;351 352	login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);353	login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);354	login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;355 356	login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;357	login_wqe->resp_bd_list_addr_hi =358		(u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);359 360	dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |361		 (bnx2i_conn->gen_pdu.resp_buf_size <<362		  ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));363	login_wqe->resp_buffer = dword;364	login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;365	login_wqe->bd_list_addr_hi =366		(u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);367	login_wqe->num_bds = 1;368	login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */369 370	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);371	return 0;372}373 374/**375 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware376 * @bnx2i_conn:	iscsi connection377 * @mtask:	driver command structure which is requesting378 *		a WQE to sent to chip for further processing379 *380 * prepare and post an iSCSI Login request WQE to CNIC firmware381 */382int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,383			 struct iscsi_task *mtask)384{385	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;386	struct iscsi_tm *tmfabort_hdr;387	struct scsi_cmnd *ref_sc;388	struct iscsi_task *ctask;389	struct bnx2i_tmf_request *tmfabort_wqe;390	u32 dword;391	u32 scsi_lun[2];392 393	tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;394	tmfabort_wqe = (struct bnx2i_tmf_request *)395						bnx2i_conn->ep->qp.sq_prod_qe;396 397	tmfabort_wqe->op_code = tmfabort_hdr->opcode;398	tmfabort_wqe->op_attr = tmfabort_hdr->flags;399 400	tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));401	tmfabort_wqe->reserved2 = 0;402	tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);403 404	switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {405	case ISCSI_TM_FUNC_ABORT_TASK:406	case ISCSI_TM_FUNC_TASK_REASSIGN:407		ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);408		if (!ctask || !ctask->sc)409			/*410			 * the iscsi layer must have completed the cmd while411			 * was starting up.412			 *413			 * Note: In the case of a SCSI cmd timeout, the task's414			 *       sc is still active; hence ctask->sc != 0415			 *       In this case, the task must be aborted416			 */417			return 0;418 419		ref_sc = ctask->sc;420		if (ref_sc->sc_data_direction == DMA_TO_DEVICE)421			dword = (ISCSI_TASK_TYPE_WRITE <<422				 ISCSI_CMD_REQUEST_TYPE_SHIFT);423		else424			dword = (ISCSI_TASK_TYPE_READ <<425				 ISCSI_CMD_REQUEST_TYPE_SHIFT);426		tmfabort_wqe->ref_itt = (dword |427					(tmfabort_hdr->rtt & ISCSI_ITT_MASK));428		break;429	default:430		tmfabort_wqe->ref_itt = RESERVED_ITT;431	}432	memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));433	tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);434	tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);435 436	tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);437 438	tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;439	tmfabort_wqe->bd_list_addr_hi = (u32)440				((u64) bnx2i_conn->hba->mp_bd_dma >> 32);441	tmfabort_wqe->num_bds = 1;442	tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */443 444	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);445	return 0;446}447 448/**449 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware450 * @bnx2i_conn:	iscsi connection451 * @mtask:	driver command structure which is requesting452 *		a WQE to sent to chip for further processing453 *454 * prepare and post an iSCSI Text request WQE to CNIC firmware455 */456int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,457			  struct iscsi_task *mtask)458{459	struct bnx2i_text_request *text_wqe;460	struct iscsi_text *text_hdr;461	u32 dword;462 463	text_hdr = (struct iscsi_text *)mtask->hdr;464	text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;465 466	memset(text_wqe, 0, sizeof(struct bnx2i_text_request));467 468	text_wqe->op_code = text_hdr->opcode;469	text_wqe->op_attr = text_hdr->flags;470	text_wqe->data_length = ntoh24(text_hdr->dlength);471	text_wqe->itt = mtask->itt |472		(ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);473	text_wqe->ttt = be32_to_cpu(text_hdr->ttt);474 475	text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);476 477	text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;478	text_wqe->resp_bd_list_addr_hi =479			(u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);480 481	dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |482		 (bnx2i_conn->gen_pdu.resp_buf_size <<483		  ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));484	text_wqe->resp_buffer = dword;485	text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;486	text_wqe->bd_list_addr_hi =487			(u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);488	text_wqe->num_bds = 1;489	text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */490 491	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);492	return 0;493}494 495 496/**497 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware498 * @bnx2i_conn:	iscsi connection499 * @cmd:	driver command structure which is requesting500 *		a WQE to sent to chip for further processing501 *502 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware503 */504int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,505			     struct bnx2i_cmd *cmd)506{507	struct bnx2i_cmd_request *scsi_cmd_wqe;508 509	scsi_cmd_wqe = (struct bnx2i_cmd_request *)510						bnx2i_conn->ep->qp.sq_prod_qe;511	memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));512	scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */513 514	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);515	return 0;516}517 518/**519 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware520 * @bnx2i_conn:		iscsi connection521 * @task:		transport layer's command structure pointer which is522 *                      requesting a WQE to sent to chip for further processing523 * @datap:		payload buffer pointer524 * @data_len:		payload data length525 * @unsol:		indicated whether nopout pdu is unsolicited pdu or526 *			in response to target's NOPIN w/ TTT != FFFFFFFF527 *528 * prepare and post a nopout request WQE to CNIC firmware529 */530int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,531			    struct iscsi_task *task,532			    char *datap, int data_len, int unsol)533{534	struct bnx2i_endpoint *ep = bnx2i_conn->ep;535	struct bnx2i_nop_out_request *nopout_wqe;536	struct iscsi_nopout *nopout_hdr;537 538	nopout_hdr = (struct iscsi_nopout *)task->hdr;539	nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;540 541	memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));542 543	nopout_wqe->op_code = nopout_hdr->opcode;544	nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;545	memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);546 547	/* 57710 requires LUN field to be swapped */548	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))549		swap(nopout_wqe->lun[0], nopout_wqe->lun[1]);550 551	nopout_wqe->itt = ((u16)task->itt |552			   (ISCSI_TASK_TYPE_MPATH <<553			    ISCSI_TMF_REQUEST_TYPE_SHIFT));554	nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);555	nopout_wqe->flags = 0;556	if (!unsol)557		nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;558	else if (nopout_hdr->itt == RESERVED_ITT)559		nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;560 561	nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);562	nopout_wqe->data_length = data_len;563	if (data_len) {564		/* handle payload data, not required in first release */565		printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");566	} else {567		nopout_wqe->bd_list_addr_lo = (u32)568					bnx2i_conn->hba->mp_bd_dma;569		nopout_wqe->bd_list_addr_hi =570			(u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);571		nopout_wqe->num_bds = 1;572	}573	nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */574 575	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);576	return 0;577}578 579 580/**581 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware582 * @bnx2i_conn:	iscsi connection583 * @task:	transport layer's command structure pointer which is584 *		requesting a WQE to sent to chip for further processing585 *586 * prepare and post logout request WQE to CNIC firmware587 */588int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,589			    struct iscsi_task *task)590{591	struct bnx2i_logout_request *logout_wqe;592	struct iscsi_logout *logout_hdr;593 594	logout_hdr = (struct iscsi_logout *)task->hdr;595 596	logout_wqe = (struct bnx2i_logout_request *)597						bnx2i_conn->ep->qp.sq_prod_qe;598	memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));599 600	logout_wqe->op_code = logout_hdr->opcode;601	logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);602	logout_wqe->op_attr =603			logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;604	logout_wqe->itt = ((u16)task->itt |605			   (ISCSI_TASK_TYPE_MPATH <<606			    ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));607	logout_wqe->data_length = 0;608	logout_wqe->cid = 0;609 610	logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;611	logout_wqe->bd_list_addr_hi = (u32)612				((u64) bnx2i_conn->hba->mp_bd_dma >> 32);613	logout_wqe->num_bds = 1;614	logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */615 616	bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;617 618	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);619	return 0;620}621 622 623/**624 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware625 * @conn:	iscsi connection which requires iscsi parameter update626 *627 * sends down iSCSI Conn Update request to move iSCSI conn to FFP628 */629void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)630{631	struct bnx2i_conn *bnx2i_conn = conn->dd_data;632	struct bnx2i_hba *hba = bnx2i_conn->hba;633	struct kwqe *kwqe_arr[2];634	struct iscsi_kwqe_conn_update *update_wqe;635	struct iscsi_kwqe_conn_update conn_update_kwqe;636 637	update_wqe = &conn_update_kwqe;638 639	update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;640	update_wqe->hdr.flags =641		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);642 643	/* 5771x requires conn context id to be passed as is */644	if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))645		update_wqe->context_id = bnx2i_conn->ep->ep_cid;646	else647		update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);648	update_wqe->conn_flags = 0;649	if (conn->hdrdgst_en)650		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;651	if (conn->datadgst_en)652		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;653	if (conn->session->initial_r2t_en)654		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;655	if (conn->session->imm_data_en)656		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;657 658	update_wqe->max_send_pdu_length = conn->max_xmit_dlength;659	update_wqe->max_recv_pdu_length = conn->max_recv_dlength;660	update_wqe->first_burst_length = conn->session->first_burst;661	update_wqe->max_burst_length = conn->session->max_burst;662	update_wqe->exp_stat_sn = conn->exp_statsn;663	update_wqe->max_outstanding_r2ts = conn->session->max_r2t;664	update_wqe->session_error_recovery_level = conn->session->erl;665	iscsi_conn_printk(KERN_ALERT, conn,666			  "bnx2i: conn update - MBL 0x%x FBL 0x%x"667			  "MRDSL_I 0x%x MRDSL_T 0x%x \n",668			  update_wqe->max_burst_length,669			  update_wqe->first_burst_length,670			  update_wqe->max_recv_pdu_length,671			  update_wqe->max_send_pdu_length);672 673	kwqe_arr[0] = (struct kwqe *) update_wqe;674	if (hba->cnic && hba->cnic->submit_kwqes)675		hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);676}677 678 679/**680 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware681 * @t:	timer context used to fetch the endpoint (transport682 *	handle) structure pointer683 *684 * routine to handle connection offload/destroy request timeout685 */686void bnx2i_ep_ofld_timer(struct timer_list *t)687{688	struct bnx2i_endpoint *ep = from_timer(ep, t, ofld_timer);689 690	if (ep->state == EP_STATE_OFLD_START) {691		printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");692		ep->state = EP_STATE_OFLD_FAILED;693	} else if (ep->state == EP_STATE_DISCONN_START) {694		printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");695		ep->state = EP_STATE_DISCONN_TIMEDOUT;696	} else if (ep->state == EP_STATE_CLEANUP_START) {697		printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");698		ep->state = EP_STATE_CLEANUP_FAILED;699	}700 701	wake_up_interruptible(&ep->ofld_wait);702}703 704 705static int bnx2i_power_of2(u32 val)706{707	u32 power = 0;708	if (val & (val - 1))709		return power;710	val--;711	while (val) {712		val = val >> 1;713		power++;714	}715	return power;716}717 718 719/**720 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request721 * @hba:	adapter structure pointer722 * @cmd:	driver command structure which is requesting723 *		a WQE to sent to chip for further processing724 *725 * prepares and posts CONN_OFLD_REQ1/2 KWQE726 */727void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)728{729	struct bnx2i_cleanup_request *cmd_cleanup;730 731	cmd_cleanup =732		(struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;733	memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));734 735	cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;736	cmd_cleanup->itt = cmd->req.itt;737	cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */738 739	bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);740}741 742 743/**744 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process745 * @hba:	adapter structure pointer746 * @ep:		endpoint (transport identifier) structure747 *748 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate749 * 	iscsi connection context clean-up process750 */751int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)752{753	struct kwqe *kwqe_arr[2];754	struct iscsi_kwqe_conn_destroy conn_cleanup;755	int rc = -EINVAL;756 757	memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));758 759	conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;760	conn_cleanup.hdr.flags =761		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);762	/* 5771x requires conn context id to be passed as is */763	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))764		conn_cleanup.context_id = ep->ep_cid;765	else766		conn_cleanup.context_id = (ep->ep_cid >> 7);767 768	conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;769 770	kwqe_arr[0] = (struct kwqe *) &conn_cleanup;771	if (hba->cnic && hba->cnic->submit_kwqes)772		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);773 774	return rc;775}776 777 778/**779 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process780 * @hba: 		adapter structure pointer781 * @ep: 		endpoint (transport identifier) structure782 *783 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE784 */785static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,786					 struct bnx2i_endpoint *ep)787{788	struct kwqe *kwqe_arr[2];789	struct iscsi_kwqe_conn_offload1 ofld_req1;790	struct iscsi_kwqe_conn_offload2 ofld_req2;791	dma_addr_t dma_addr;792	int num_kwqes = 2;793	u32 *ptbl;794	int rc = -EINVAL;795 796	ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;797	ofld_req1.hdr.flags =798		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);799 800	ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;801 802	dma_addr = ep->qp.sq_pgtbl_phys;803	ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;804	ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);805 806	dma_addr = ep->qp.cq_pgtbl_phys;807	ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;808	ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);809 810	ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;811	ofld_req2.hdr.flags =812		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);813 814	dma_addr = ep->qp.rq_pgtbl_phys;815	ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;816	ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);817 818	ptbl = (u32 *) ep->qp.sq_pgtbl_virt;819 820	ofld_req2.sq_first_pte.hi = *ptbl++;821	ofld_req2.sq_first_pte.lo = *ptbl;822 823	ptbl = (u32 *) ep->qp.cq_pgtbl_virt;824	ofld_req2.cq_first_pte.hi = *ptbl++;825	ofld_req2.cq_first_pte.lo = *ptbl;826 827	kwqe_arr[0] = (struct kwqe *) &ofld_req1;828	kwqe_arr[1] = (struct kwqe *) &ofld_req2;829	ofld_req2.num_additional_wqes = 0;830 831	if (hba->cnic && hba->cnic->submit_kwqes)832		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);833 834	return rc;835}836 837 838/**839 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation840 * @hba: 		adapter structure pointer841 * @ep: 		endpoint (transport identifier) structure842 *843 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE844 */845static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,846					  struct bnx2i_endpoint *ep)847{848	struct kwqe *kwqe_arr[5];849	struct iscsi_kwqe_conn_offload1 ofld_req1;850	struct iscsi_kwqe_conn_offload2 ofld_req2;851	struct iscsi_kwqe_conn_offload3 ofld_req3[1];852	dma_addr_t dma_addr;853	int num_kwqes = 2;854	u32 *ptbl;855	int rc = -EINVAL;856 857	ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;858	ofld_req1.hdr.flags =859		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);860 861	ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;862 863	dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;864	ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;865	ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);866 867	dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;868	ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;869	ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);870 871	ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;872	ofld_req2.hdr.flags =873		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);874 875	dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;876	ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;877	ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);878 879	ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);880	ofld_req2.sq_first_pte.hi = *ptbl++;881	ofld_req2.sq_first_pte.lo = *ptbl;882 883	ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);884	ofld_req2.cq_first_pte.hi = *ptbl++;885	ofld_req2.cq_first_pte.lo = *ptbl;886 887	kwqe_arr[0] = (struct kwqe *) &ofld_req1;888	kwqe_arr[1] = (struct kwqe *) &ofld_req2;889 890	ofld_req2.num_additional_wqes = 1;891	memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));892	ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);893	ofld_req3[0].qp_first_pte[0].hi = *ptbl++;894	ofld_req3[0].qp_first_pte[0].lo = *ptbl;895 896	kwqe_arr[2] = (struct kwqe *) ofld_req3;897	/* need if we decide to go with multiple KCQE's per conn */898	num_kwqes += 1;899 900	if (hba->cnic && hba->cnic->submit_kwqes)901		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);902 903	return rc;904}905 906/**907 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process908 *909 * @hba: 		adapter structure pointer910 * @ep: 		endpoint (transport identifier) structure911 *912 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE913 */914int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)915{916	int rc;917 918	if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))919		rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);920	else921		rc = bnx2i_570x_send_conn_ofld_req(hba, ep);922 923	return rc;924}925 926 927/**928 * setup_qp_page_tables - iscsi QP page table setup function929 * @ep:		endpoint (transport identifier) structure930 *931 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires932 * 	64-bit address in big endian format. Whereas 10G/sec (57710) requires933 * 	PT in little endian format934 */935static void setup_qp_page_tables(struct bnx2i_endpoint *ep)936{937	int num_pages;938	u32 *ptbl;939	dma_addr_t page;940	int cnic_dev_10g;941 942	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))943		cnic_dev_10g = 1;944	else945		cnic_dev_10g = 0;946 947	/* SQ page table */948	memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);949	num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE;950	page = ep->qp.sq_phys;951 952	if (cnic_dev_10g)953		ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);954	else955		ptbl = (u32 *) ep->qp.sq_pgtbl_virt;956	while (num_pages--) {957		if (cnic_dev_10g) {958			/* PTE is written in little endian format for 57710 */959			*ptbl = (u32) page;960			ptbl++;961			*ptbl = (u32) ((u64) page >> 32);962			ptbl++;963			page += CNIC_PAGE_SIZE;964		} else {965			/* PTE is written in big endian format for966			 * 5706/5708/5709 devices */967			*ptbl = (u32) ((u64) page >> 32);968			ptbl++;969			*ptbl = (u32) page;970			ptbl++;971			page += CNIC_PAGE_SIZE;972		}973	}974 975	/* RQ page table */976	memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);977	num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE;978	page = ep->qp.rq_phys;979 980	if (cnic_dev_10g)981		ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);982	else983		ptbl = (u32 *) ep->qp.rq_pgtbl_virt;984	while (num_pages--) {985		if (cnic_dev_10g) {986			/* PTE is written in little endian format for 57710 */987			*ptbl = (u32) page;988			ptbl++;989			*ptbl = (u32) ((u64) page >> 32);990			ptbl++;991			page += CNIC_PAGE_SIZE;992		} else {993			/* PTE is written in big endian format for994			 * 5706/5708/5709 devices */995			*ptbl = (u32) ((u64) page >> 32);996			ptbl++;997			*ptbl = (u32) page;998			ptbl++;999			page += CNIC_PAGE_SIZE;1000		}1001	}1002 1003	/* CQ page table */1004	memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);1005	num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE;1006	page = ep->qp.cq_phys;1007 1008	if (cnic_dev_10g)1009		ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);1010	else1011		ptbl = (u32 *) ep->qp.cq_pgtbl_virt;1012	while (num_pages--) {1013		if (cnic_dev_10g) {1014			/* PTE is written in little endian format for 57710 */1015			*ptbl = (u32) page;1016			ptbl++;1017			*ptbl = (u32) ((u64) page >> 32);1018			ptbl++;1019			page += CNIC_PAGE_SIZE;1020		} else {1021			/* PTE is written in big endian format for1022			 * 5706/5708/5709 devices */1023			*ptbl = (u32) ((u64) page >> 32);1024			ptbl++;1025			*ptbl = (u32) page;1026			ptbl++;1027			page += CNIC_PAGE_SIZE;1028		}1029	}1030}1031 1032 1033/**1034 * bnx2i_alloc_qp_resc - allocates required resources for QP.1035 * @hba:	adapter structure pointer1036 * @ep:		endpoint (transport identifier) structure1037 *1038 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able1039 *	memory for SQ/RQ/CQ and page tables. EP structure elements such1040 *	as producer/consumer indexes/pointers, queue sizes and page table1041 *	contents are setup1042 */1043int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)1044{1045	struct bnx2i_5771x_cq_db *cq_db;1046 1047	ep->hba = hba;1048	ep->conn = NULL;1049	ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;1050 1051	/* Allocate page table memory for SQ which is page aligned */1052	ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;1053	ep->qp.sq_mem_size =1054		(ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;1055	ep->qp.sq_pgtbl_size =1056		(ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);1057	ep->qp.sq_pgtbl_size =1058		(ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;1059 1060	ep->qp.sq_pgtbl_virt =1061		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,1062				   &ep->qp.sq_pgtbl_phys, GFP_KERNEL);1063	if (!ep->qp.sq_pgtbl_virt) {1064		printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",1065				  ep->qp.sq_pgtbl_size);1066		goto mem_alloc_err;1067	}1068 1069	/* Allocate memory area for actual SQ element */1070	ep->qp.sq_virt =1071		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,1072				   &ep->qp.sq_phys, GFP_KERNEL);1073	if (!ep->qp.sq_virt) {1074		printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",1075				  ep->qp.sq_mem_size);1076		goto mem_alloc_err;1077	}1078 1079	ep->qp.sq_first_qe = ep->qp.sq_virt;1080	ep->qp.sq_prod_qe = ep->qp.sq_first_qe;1081	ep->qp.sq_cons_qe = ep->qp.sq_first_qe;1082	ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];1083	ep->qp.sq_prod_idx = 0;1084	ep->qp.sq_cons_idx = 0;1085	ep->qp.sqe_left = hba->max_sqes;1086 1087	/* Allocate page table memory for CQ which is page aligned */1088	ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;1089	ep->qp.cq_mem_size =1090		(ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;1091	ep->qp.cq_pgtbl_size =1092		(ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);1093	ep->qp.cq_pgtbl_size =1094		(ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;1095 1096	ep->qp.cq_pgtbl_virt =1097		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,1098				   &ep->qp.cq_pgtbl_phys, GFP_KERNEL);1099	if (!ep->qp.cq_pgtbl_virt) {1100		printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",1101				  ep->qp.cq_pgtbl_size);1102		goto mem_alloc_err;1103	}1104 1105	/* Allocate memory area for actual CQ element */1106	ep->qp.cq_virt =1107		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,1108				   &ep->qp.cq_phys, GFP_KERNEL);1109	if (!ep->qp.cq_virt) {1110		printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",1111				  ep->qp.cq_mem_size);1112		goto mem_alloc_err;1113	}1114 1115	ep->qp.cq_first_qe = ep->qp.cq_virt;1116	ep->qp.cq_prod_qe = ep->qp.cq_first_qe;1117	ep->qp.cq_cons_qe = ep->qp.cq_first_qe;1118	ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];1119	ep->qp.cq_prod_idx = 0;1120	ep->qp.cq_cons_idx = 0;1121	ep->qp.cqe_left = hba->max_cqes;1122	ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;1123	ep->qp.cqe_size = hba->max_cqes;1124 1125	/* Invalidate all EQ CQE index, req only for 57710 */1126	cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;1127	memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);1128 1129	/* Allocate page table memory for RQ which is page aligned */1130	ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;1131	ep->qp.rq_mem_size =1132		(ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;1133	ep->qp.rq_pgtbl_size =1134		(ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);1135	ep->qp.rq_pgtbl_size =1136		(ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;1137 1138	ep->qp.rq_pgtbl_virt =1139		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,1140				   &ep->qp.rq_pgtbl_phys, GFP_KERNEL);1141	if (!ep->qp.rq_pgtbl_virt) {1142		printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",1143				  ep->qp.rq_pgtbl_size);1144		goto mem_alloc_err;1145	}1146 1147	/* Allocate memory area for actual RQ element */1148	ep->qp.rq_virt =1149		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,1150				   &ep->qp.rq_phys, GFP_KERNEL);1151	if (!ep->qp.rq_virt) {1152		printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",1153				  ep->qp.rq_mem_size);1154		goto mem_alloc_err;1155	}1156 1157	ep->qp.rq_first_qe = ep->qp.rq_virt;1158	ep->qp.rq_prod_qe = ep->qp.rq_first_qe;1159	ep->qp.rq_cons_qe = ep->qp.rq_first_qe;1160	ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];1161	ep->qp.rq_prod_idx = 0x8000;1162	ep->qp.rq_cons_idx = 0;1163	ep->qp.rqe_left = hba->max_rqes;1164 1165	setup_qp_page_tables(ep);1166 1167	return 0;1168 1169mem_alloc_err:1170	bnx2i_free_qp_resc(hba, ep);1171	return -ENOMEM;1172}1173 1174 1175 1176/**1177 * bnx2i_free_qp_resc - free memory resources held by QP1178 * @hba:	adapter structure pointer1179 * @ep:	endpoint (transport identifier) structure1180 *1181 * Free QP resources - SQ/RQ/CQ memory and page tables.1182 */1183void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)1184{1185	if (ep->qp.ctx_base) {1186		iounmap(ep->qp.ctx_base);1187		ep->qp.ctx_base = NULL;1188	}1189	/* Free SQ mem */1190	if (ep->qp.sq_pgtbl_virt) {1191		dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,1192				  ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);1193		ep->qp.sq_pgtbl_virt = NULL;1194		ep->qp.sq_pgtbl_phys = 0;1195	}1196	if (ep->qp.sq_virt) {1197		dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,1198				  ep->qp.sq_virt, ep->qp.sq_phys);1199		ep->qp.sq_virt = NULL;1200		ep->qp.sq_phys = 0;1201	}1202 1203	/* Free RQ mem */1204	if (ep->qp.rq_pgtbl_virt) {1205		dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,1206				  ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);1207		ep->qp.rq_pgtbl_virt = NULL;1208		ep->qp.rq_pgtbl_phys = 0;1209	}1210	if (ep->qp.rq_virt) {1211		dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,1212				  ep->qp.rq_virt, ep->qp.rq_phys);1213		ep->qp.rq_virt = NULL;1214		ep->qp.rq_phys = 0;1215	}1216 1217	/* Free CQ mem */1218	if (ep->qp.cq_pgtbl_virt) {1219		dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,1220				  ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);1221		ep->qp.cq_pgtbl_virt = NULL;1222		ep->qp.cq_pgtbl_phys = 0;1223	}1224	if (ep->qp.cq_virt) {1225		dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,1226				  ep->qp.cq_virt, ep->qp.cq_phys);1227		ep->qp.cq_virt = NULL;1228		ep->qp.cq_phys = 0;1229	}1230}1231 1232 1233/**1234 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w1235 * @hba:	adapter structure pointer1236 *1237 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w1238 * 	This results in iSCSi support validation and on-chip context manager1239 * 	initialization.  Firmware completes this handshake with a CQE carrying1240 * 	the result of iscsi support validation. Parameter carried by1241 * 	iscsi init request determines the number of offloaded connection and1242 * 	tolerance level for iscsi protocol violation this hba/chip can support1243 */1244int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)1245{1246	struct kwqe *kwqe_arr[3];1247	struct iscsi_kwqe_init1 iscsi_init;1248	struct iscsi_kwqe_init2 iscsi_init2;1249	int rc = 0;1250	u64 mask64;1251 1252	memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1));1253	memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2));1254 1255	bnx2i_adjust_qp_size(hba);1256 1257	iscsi_init.flags =1258		(CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;1259	if (en_tcp_dack)1260		iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;1261	iscsi_init.reserved0 = 0;1262	iscsi_init.num_cqs = 1;1263	iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;1264	iscsi_init.hdr.flags =1265		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);1266 1267	iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;1268	iscsi_init.dummy_buffer_addr_hi =1269		(u32) ((u64) hba->dummy_buf_dma >> 32);1270 1271	hba->num_ccell = hba->max_sqes >> 1;1272	hba->ctx_ccell_tasks =1273			((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));1274	iscsi_init.num_ccells_per_conn = hba->num_ccell;1275	iscsi_init.num_tasks_per_conn = hba->max_sqes;1276	iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;1277	iscsi_init.sq_num_wqes = hba->max_sqes;1278	iscsi_init.cq_log_wqes_per_page =1279		(u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE);1280	iscsi_init.cq_num_wqes = hba->max_cqes;1281	iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +1282				   (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;1283	iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +1284				   (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;1285	iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;1286	iscsi_init.rq_num_wqes = hba->max_rqes;1287 1288 1289	iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;1290	iscsi_init2.hdr.flags =1291		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);1292	iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;1293	mask64 = 0x0ULL;1294	mask64 |= (1295		/* CISCO MDS */1296		(1UL <<1297		  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |1298		/* HP MSA1510i */1299		(1UL <<1300		  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |1301		/* EMC */1302		(1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));1303	if (error_mask1) {1304		iscsi_init2.error_bit_map[0] = error_mask1;1305		mask64 ^= (u32)(mask64);1306		mask64 |= error_mask1;1307	} else1308		iscsi_init2.error_bit_map[0] = (u32) mask64;1309 1310	if (error_mask2) {1311		iscsi_init2.error_bit_map[1] = error_mask2;1312		mask64 &= 0xffffffff;1313		mask64 |= ((u64)error_mask2 << 32);1314	} else1315		iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);1316 1317	iscsi_error_mask = mask64;1318 1319	kwqe_arr[0] = (struct kwqe *) &iscsi_init;1320	kwqe_arr[1] = (struct kwqe *) &iscsi_init2;1321 1322	if (hba->cnic && hba->cnic->submit_kwqes)1323		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);1324	return rc;1325}1326 1327 1328/**1329 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.1330 * @session:	iscsi session1331 * @bnx2i_conn:	bnx2i connection1332 * @cqe:	pointer to newly DMA'ed CQE entry for processing1333 *1334 * process SCSI CMD Response CQE & complete the request to SCSI-ML1335 */1336int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,1337				struct bnx2i_conn *bnx2i_conn,1338				struct cqe *cqe)1339{1340	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1341	struct bnx2i_hba *hba = bnx2i_conn->hba;1342	struct bnx2i_cmd_response *resp_cqe;1343	struct bnx2i_cmd *bnx2i_cmd;1344	struct iscsi_task *task;1345	struct iscsi_scsi_rsp *hdr;1346	u32 datalen = 0;1347 1348	resp_cqe = (struct bnx2i_cmd_response *)cqe;1349	spin_lock_bh(&session->back_lock);1350	task = iscsi_itt_to_task(conn,1351				 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);1352	if (!task)1353		goto fail;1354 1355	bnx2i_cmd = task->dd_data;1356 1357	if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {1358		conn->datain_pdus_cnt +=1359			resp_cqe->task_stat.read_stat.num_data_ins;1360		conn->rxdata_octets +=1361			bnx2i_cmd->req.total_data_transfer_length;1362		ADD_STATS_64(hba, rx_pdus,1363			     resp_cqe->task_stat.read_stat.num_data_ins);1364		ADD_STATS_64(hba, rx_bytes,1365			     bnx2i_cmd->req.total_data_transfer_length);1366	} else {1367		conn->dataout_pdus_cnt +=1368			resp_cqe->task_stat.write_stat.num_data_outs;1369		conn->r2t_pdus_cnt +=1370			resp_cqe->task_stat.write_stat.num_r2ts;1371		conn->txdata_octets +=1372			bnx2i_cmd->req.total_data_transfer_length;1373		ADD_STATS_64(hba, tx_pdus,1374			     resp_cqe->task_stat.write_stat.num_data_outs);1375		ADD_STATS_64(hba, tx_bytes,1376			     bnx2i_cmd->req.total_data_transfer_length);1377		ADD_STATS_64(hba, rx_pdus,1378			     resp_cqe->task_stat.write_stat.num_r2ts);1379	}1380	bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);1381 1382	hdr = (struct iscsi_scsi_rsp *)task->hdr;1383	resp_cqe = (struct bnx2i_cmd_response *)cqe;1384	hdr->opcode = resp_cqe->op_code;1385	hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);1386	hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);1387	hdr->response = resp_cqe->response;1388	hdr->cmd_status = resp_cqe->status;1389	hdr->flags = resp_cqe->response_flags;1390	hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);1391 1392	if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)1393		goto done;1394 1395	if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {1396		datalen = resp_cqe->data_length;1397		if (datalen < 2)1398			goto done;1399 1400		if (datalen > BNX2I_RQ_WQE_SIZE) {1401			iscsi_conn_printk(KERN_ERR, conn,1402					  "sense data len %d > RQ sz\n",1403					  datalen);1404			datalen = BNX2I_RQ_WQE_SIZE;1405		} else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {1406			iscsi_conn_printk(KERN_ERR, conn,1407					  "sense data len %d > conn data\n",1408					  datalen);1409			datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;1410		}1411 1412		bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);1413		bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);1414	}1415 1416done:1417	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,1418			     conn->data, datalen);1419fail:1420	spin_unlock_bh(&session->back_lock);1421	return 0;1422}1423 1424 1425/**1426 * bnx2i_process_login_resp - this function handles iscsi login response1427 * @session:		iscsi session pointer1428 * @bnx2i_conn:		iscsi connection pointer1429 * @cqe:		pointer to newly DMA'ed CQE entry for processing1430 *1431 * process Login Response CQE & complete it to open-iscsi user daemon1432 */1433static int bnx2i_process_login_resp(struct iscsi_session *session,1434				    struct bnx2i_conn *bnx2i_conn,1435				    struct cqe *cqe)1436{1437	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1438	struct iscsi_task *task;1439	struct bnx2i_login_response *login;1440	struct iscsi_login_rsp *resp_hdr;1441	int pld_len;1442	int pad_len;1443 1444	login = (struct bnx2i_login_response *) cqe;1445	spin_lock(&session->back_lock);1446	task = iscsi_itt_to_task(conn,1447				 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);1448	if (!task)1449		goto done;1450 1451	resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;1452	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));1453	resp_hdr->opcode = login->op_code;1454	resp_hdr->flags = login->response_flags;1455	resp_hdr->max_version = login->version_max;1456	resp_hdr->active_version = login->version_active;1457	resp_hdr->hlength = 0;1458 1459	hton24(resp_hdr->dlength, login->data_length);1460	memcpy(resp_hdr->isid, &login->isid_lo, 6);1461	resp_hdr->tsih = cpu_to_be16(login->tsih);1462	resp_hdr->itt = task->hdr->itt;1463	resp_hdr->statsn = cpu_to_be32(login->stat_sn);1464	resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);1465	resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);1466	resp_hdr->status_class = login->status_class;1467	resp_hdr->status_detail = login->status_detail;1468	pld_len = login->data_length;1469	bnx2i_conn->gen_pdu.resp_wr_ptr =1470					bnx2i_conn->gen_pdu.resp_buf + pld_len;1471 1472	pad_len = 0;1473	if (pld_len & 0x3)1474		pad_len = 4 - (pld_len % 4);1475 1476	if (pad_len) {1477		int i = 0;1478		for (i = 0; i < pad_len; i++) {1479			bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;1480			bnx2i_conn->gen_pdu.resp_wr_ptr++;1481		}1482	}1483 1484	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,1485		bnx2i_conn->gen_pdu.resp_buf,1486		bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);1487done:1488	spin_unlock(&session->back_lock);1489	return 0;1490}1491 1492 1493/**1494 * bnx2i_process_text_resp - this function handles iscsi text response1495 * @session:	iscsi session pointer1496 * @bnx2i_conn:	iscsi connection pointer1497 * @cqe:	pointer to newly DMA'ed CQE entry for processing1498 *1499 * process iSCSI Text Response CQE&  complete it to open-iscsi user daemon1500 */1501static int bnx2i_process_text_resp(struct iscsi_session *session,1502				   struct bnx2i_conn *bnx2i_conn,1503				   struct cqe *cqe)1504{1505	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1506	struct iscsi_task *task;1507	struct bnx2i_text_response *text;1508	struct iscsi_text_rsp *resp_hdr;1509	int pld_len;1510	int pad_len;1511 1512	text = (struct bnx2i_text_response *) cqe;1513	spin_lock(&session->back_lock);1514	task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);1515	if (!task)1516		goto done;1517 1518	resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;1519	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));1520	resp_hdr->opcode = text->op_code;1521	resp_hdr->flags = text->response_flags;1522	resp_hdr->hlength = 0;1523 1524	hton24(resp_hdr->dlength, text->data_length);1525	resp_hdr->itt = task->hdr->itt;1526	resp_hdr->ttt = cpu_to_be32(text->ttt);1527	resp_hdr->statsn = task->hdr->exp_statsn;1528	resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);1529	resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);1530	pld_len = text->data_length;1531	bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +1532					  pld_len;1533	pad_len = 0;1534	if (pld_len & 0x3)1535		pad_len = 4 - (pld_len % 4);1536 1537	if (pad_len) {1538		int i = 0;1539		for (i = 0; i < pad_len; i++) {1540			bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;1541			bnx2i_conn->gen_pdu.resp_wr_ptr++;1542		}1543	}1544	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,1545			     bnx2i_conn->gen_pdu.resp_buf,1546			     bnx2i_conn->gen_pdu.resp_wr_ptr -1547			     bnx2i_conn->gen_pdu.resp_buf);1548done:1549	spin_unlock(&session->back_lock);1550	return 0;1551}1552 1553 1554/**1555 * bnx2i_process_tmf_resp - this function handles iscsi TMF response1556 * @session:		iscsi session pointer1557 * @bnx2i_conn:		iscsi connection pointer1558 * @cqe:		pointer to newly DMA'ed CQE entry for processing1559 *1560 * process iSCSI TMF Response CQE and wake up the driver eh thread.1561 */1562static int bnx2i_process_tmf_resp(struct iscsi_session *session,1563				  struct bnx2i_conn *bnx2i_conn,1564				  struct cqe *cqe)1565{1566	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1567	struct iscsi_task *task;1568	struct bnx2i_tmf_response *tmf_cqe;1569	struct iscsi_tm_rsp *resp_hdr;1570 1571	tmf_cqe = (struct bnx2i_tmf_response *)cqe;1572	spin_lock(&session->back_lock);1573	task = iscsi_itt_to_task(conn,1574				 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);1575	if (!task)1576		goto done;1577 1578	resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;1579	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));1580	resp_hdr->opcode = tmf_cqe->op_code;1581	resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);1582	resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);1583	resp_hdr->itt = task->hdr->itt;1584	resp_hdr->response = tmf_cqe->response;1585 1586	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);1587done:1588	spin_unlock(&session->back_lock);1589	return 0;1590}1591 1592/**1593 * bnx2i_process_logout_resp - this function handles iscsi logout response1594 * @session:		iscsi session pointer1595 * @bnx2i_conn:		iscsi connection pointer1596 * @cqe:		pointer to newly DMA'ed CQE entry for processing1597 *1598 * process iSCSI Logout Response CQE & make function call to1599 * notify the user daemon.1600 */1601static int bnx2i_process_logout_resp(struct iscsi_session *session,1602				     struct bnx2i_conn *bnx2i_conn,1603				     struct cqe *cqe)1604{1605	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1606	struct iscsi_task *task;1607	struct bnx2i_logout_response *logout;1608	struct iscsi_logout_rsp *resp_hdr;1609 1610	logout = (struct bnx2i_logout_response *) cqe;1611	spin_lock(&session->back_lock);1612	task = iscsi_itt_to_task(conn,1613				 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);1614	if (!task)1615		goto done;1616 1617	resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;1618	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));1619	resp_hdr->opcode = logout->op_code;1620	resp_hdr->flags = logout->response;1621	resp_hdr->hlength = 0;1622 1623	resp_hdr->itt = task->hdr->itt;1624	resp_hdr->statsn = task->hdr->exp_statsn;1625	resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);1626	resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);1627 1628	resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);1629	resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);1630 1631	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);1632 1633	bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;1634done:1635	spin_unlock(&session->back_lock);1636	return 0;1637}1638 1639/**1640 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE1641 * @session:		iscsi session pointer1642 * @bnx2i_conn:		iscsi connection pointer1643 * @cqe:		pointer to newly DMA'ed CQE entry for processing1644 *1645 * process iSCSI NOPIN local completion CQE, frees IIT and command structures1646 */1647static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,1648					   struct bnx2i_conn *bnx2i_conn,1649					   struct cqe *cqe)1650{1651	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1652	struct bnx2i_nop_in_msg *nop_in;1653	struct iscsi_task *task;1654 1655	nop_in = (struct bnx2i_nop_in_msg *)cqe;1656	spin_lock(&session->back_lock);1657	task = iscsi_itt_to_task(conn,1658				 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);1659	if (task)1660		__iscsi_put_task(task);1661	spin_unlock(&session->back_lock);1662}1663 1664/**1665 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd1666 * @bnx2i_conn:	iscsi connection1667 *1668 * Firmware advances RQ producer index for every unsolicited PDU even if1669 *	payload data length is '0'. This function makes corresponding1670 *	adjustments on the driver side to match this f/w behavior1671 */1672static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)1673{1674	char dummy_rq_data[2];1675	bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);1676	bnx2i_put_rq_buf(bnx2i_conn, 1);1677}1678 1679 1680/**1681 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE1682 * @session:		iscsi session pointer1683 * @bnx2i_conn:		iscsi connection pointer1684 * @cqe:		pointer to newly DMA'ed CQE entry for processing1685 *1686 * process iSCSI target's proactive iSCSI NOPIN request1687 */1688static int bnx2i_process_nopin_mesg(struct iscsi_session *session,1689				     struct bnx2i_conn *bnx2i_conn,1690				     struct cqe *cqe)1691{1692	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1693	struct iscsi_task *task;1694	struct bnx2i_nop_in_msg *nop_in;1695	struct iscsi_nopin *hdr;1696	int tgt_async_nop = 0;1697 1698	nop_in = (struct bnx2i_nop_in_msg *)cqe;1699 1700	spin_lock(&session->back_lock);1701	hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;1702	memset(hdr, 0, sizeof(struct iscsi_hdr));1703	hdr->opcode = nop_in->op_code;1704	hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);1705	hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);1706	hdr->ttt = cpu_to_be32(nop_in->ttt);1707 1708	if (nop_in->itt == (u16) RESERVED_ITT) {1709		bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);1710		hdr->itt = RESERVED_ITT;1711		tgt_async_nop = 1;1712		goto done;1713	}1714 1715	/* this is a response to one of our nop-outs */1716	task = iscsi_itt_to_task(conn,1717			 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));1718	if (task) {1719		hdr->flags = ISCSI_FLAG_CMD_FINAL;1720		hdr->itt = task->hdr->itt;1721		hdr->ttt = cpu_to_be32(nop_in->ttt);1722		memcpy(&hdr->lun, nop_in->lun, 8);1723	}1724done:1725	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);1726	spin_unlock(&session->back_lock);1727 1728	return tgt_async_nop;1729}1730 1731 1732/**1733 * bnx2i_process_async_mesg - this function handles iscsi async message1734 * @session:		iscsi session pointer1735 * @bnx2i_conn:		iscsi connection pointer1736 * @cqe:		pointer to newly DMA'ed CQE entry for processing1737 *1738 * process iSCSI ASYNC Message1739 */1740static void bnx2i_process_async_mesg(struct iscsi_session *session,1741				     struct bnx2i_conn *bnx2i_conn,1742				     struct cqe *cqe)1743{1744	struct bnx2i_async_msg *async_cqe;1745	struct iscsi_async *resp_hdr;1746	u8 async_event;1747 1748	bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);1749 1750	async_cqe = (struct bnx2i_async_msg *)cqe;1751	async_event = async_cqe->async_event;1752 1753	if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {1754		iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,1755				  "async: scsi events not supported\n");1756		return;1757	}1758 1759	spin_lock(&session->back_lock);1760	resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;1761	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));1762	resp_hdr->opcode = async_cqe->op_code;1763	resp_hdr->flags = 0x80;1764 1765	memcpy(&resp_hdr->lun, async_cqe->lun, 8);1766	resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);1767	resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);1768 1769	resp_hdr->async_event = async_cqe->async_event;1770	resp_hdr->async_vcode = async_cqe->async_vcode;1771 1772	resp_hdr->param1 = cpu_to_be16(async_cqe->param1);1773	resp_hdr->param2 = cpu_to_be16(async_cqe->param2);1774	resp_hdr->param3 = cpu_to_be16(async_cqe->param3);1775 1776	__iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,1777			     (struct iscsi_hdr *)resp_hdr, NULL, 0);1778	spin_unlock(&session->back_lock);1779}1780 1781 1782/**1783 * bnx2i_process_reject_mesg - process iscsi reject pdu1784 * @session:		iscsi session pointer1785 * @bnx2i_conn:		iscsi connection pointer1786 * @cqe:		pointer to newly DMA'ed CQE entry for processing1787 *1788 * process iSCSI REJECT message1789 */1790static void bnx2i_process_reject_mesg(struct iscsi_session *session,1791				      struct bnx2i_conn *bnx2i_conn,1792				      struct cqe *cqe)1793{1794	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1795	struct bnx2i_reject_msg *reject;1796	struct iscsi_reject *hdr;1797 1798	reject = (struct bnx2i_reject_msg *) cqe;1799	if (reject->data_length) {1800		bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);1801		bnx2i_put_rq_buf(bnx2i_conn, 1);1802	} else1803		bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);1804 1805	spin_lock(&session->back_lock);1806	hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;1807	memset(hdr, 0, sizeof(struct iscsi_hdr));1808	hdr->opcode = reject->op_code;1809	hdr->reason = reject->reason;1810	hton24(hdr->dlength, reject->data_length);1811	hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);1812	hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);1813	hdr->ffffffff = cpu_to_be32(RESERVED_ITT);1814	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,1815			     reject->data_length);1816	spin_unlock(&session->back_lock);1817}1818 1819/**1820 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion1821 * @session:		iscsi session pointer1822 * @bnx2i_conn:		iscsi connection pointer1823 * @cqe:		pointer to newly DMA'ed CQE entry for processing1824 *1825 * process command cleanup response CQE during conn shutdown or error recovery1826 */1827static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,1828					   struct bnx2i_conn *bnx2i_conn,1829					   struct cqe *cqe)1830{1831	struct bnx2i_cleanup_response *cmd_clean_rsp;1832	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1833	struct iscsi_task *task;1834 1835	cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;1836	spin_lock(&session->back_lock);1837	task = iscsi_itt_to_task(conn,1838			cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);1839	if (!task)1840		printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",1841			cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);1842	spin_unlock(&session->back_lock);1843	complete(&bnx2i_conn->cmd_cleanup_cmpl);1844}1845 1846 1847/**1848 * bnx2i_percpu_io_thread - thread per cpu for ios1849 *1850 * @arg:	ptr to bnx2i_percpu_info structure1851 */1852int bnx2i_percpu_io_thread(void *arg)1853{1854	struct bnx2i_percpu_s *p = arg;1855	struct bnx2i_work *work, *tmp;1856	LIST_HEAD(work_list);1857 1858	set_user_nice(current, MIN_NICE);1859 1860	while (!kthread_should_stop()) {1861		spin_lock_bh(&p->p_work_lock);1862		while (!list_empty(&p->work_list)) {1863			list_splice_init(&p->work_list, &work_list);1864			spin_unlock_bh(&p->p_work_lock);1865 1866			list_for_each_entry_safe(work, tmp, &work_list, list) {1867				list_del_init(&work->list);1868				/* work allocated in the bh, freed here */1869				bnx2i_process_scsi_cmd_resp(work->session,1870							    work->bnx2i_conn,1871							    &work->cqe);1872				atomic_dec(&work->bnx2i_conn->work_cnt);1873				kfree(work);1874			}1875			spin_lock_bh(&p->p_work_lock);1876		}1877		set_current_state(TASK_INTERRUPTIBLE);1878		spin_unlock_bh(&p->p_work_lock);1879		schedule();1880	}1881	__set_current_state(TASK_RUNNING);1882 1883	return 0;1884}1885 1886 1887/**1888 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread1889 * @session:		iscsi session1890 * @bnx2i_conn:		bnx2i connection1891 * @cqe:		pointer to newly DMA'ed CQE entry for processing1892 *1893 * this function is called by generic KCQ handler to queue all pending cmd1894 * completion CQEs1895 *1896 * The implementation is to queue the cmd response based on the1897 * last recorded command for the given connection.  The1898 * cpu_id gets recorded upon task_xmit.  No out-of-order completion!1899 */1900static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,1901				     struct bnx2i_conn *bnx2i_conn,1902				     struct bnx2i_nop_in_msg *cqe)1903{1904	struct bnx2i_work *bnx2i_work = NULL;1905	struct bnx2i_percpu_s *p = NULL;1906	struct iscsi_task *task;1907	struct scsi_cmnd *sc;1908	int rc = 0;1909 1910	spin_lock(&session->back_lock);1911	task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,1912				 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);1913	if (!task || !task->sc) {1914		spin_unlock(&session->back_lock);1915		return -EINVAL;1916	}1917	sc = task->sc;1918 1919	spin_unlock(&session->back_lock);1920 1921	p = &per_cpu(bnx2i_percpu, blk_mq_rq_cpu(scsi_cmd_to_rq(sc)));1922	spin_lock(&p->p_work_lock);1923	if (unlikely(!p->iothread)) {1924		rc = -EINVAL;1925		goto err;1926	}1927	/* Alloc and copy to the cqe */1928	bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);1929	if (bnx2i_work) {1930		INIT_LIST_HEAD(&bnx2i_work->list);1931		bnx2i_work->session = session;1932		bnx2i_work->bnx2i_conn = bnx2i_conn;1933		memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));1934		list_add_tail(&bnx2i_work->list, &p->work_list);1935		atomic_inc(&bnx2i_conn->work_cnt);1936		wake_up_process(p->iothread);1937		spin_unlock(&p->p_work_lock);1938		goto done;1939	} else1940		rc = -ENOMEM;1941err:1942	spin_unlock(&p->p_work_lock);1943	bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);1944done:1945	return rc;1946}1947 1948 1949/**1950 * bnx2i_process_new_cqes - process newly DMA'ed CQE's1951 * @bnx2i_conn:		bnx2i connection1952 *1953 * this function is called by generic KCQ handler to process all pending CQE's1954 */1955static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)1956{1957	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;1958	struct iscsi_session *session = conn->session;1959	struct bnx2i_hba *hba = bnx2i_conn->hba;1960	struct qp_info *qp;1961	struct bnx2i_nop_in_msg *nopin;1962	int tgt_async_msg;1963	int cqe_cnt = 0;1964 1965	if (bnx2i_conn->ep == NULL)1966		return 0;1967 1968	qp = &bnx2i_conn->ep->qp;1969 1970	if (!qp->cq_virt) {1971		printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",1972		       hba->netdev->name);1973		goto out;1974	}1975	while (1) {1976		nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;1977		if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)1978			break;1979 1980		if (unlikely(test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags))) {1981			if (nopin->op_code == ISCSI_OP_NOOP_IN &&1982			    nopin->itt == (u16) RESERVED_ITT) {1983				printk(KERN_ALERT "bnx2i: Unsolicited "1984				       "NOP-In detected for suspended "1985				       "connection dev=%s!\n",1986				       hba->netdev->name);1987				bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);1988				goto cqe_out;1989			}1990			break;1991		}1992		tgt_async_msg = 0;1993 1994		switch (nopin->op_code) {1995		case ISCSI_OP_SCSI_CMD_RSP:1996		case ISCSI_OP_SCSI_DATA_IN:1997			/* Run the kthread engine only for data cmds1998			   All other cmds will be completed in this bh! */1999			bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);2000			goto done;2001		case ISCSI_OP_LOGIN_RSP:2002			bnx2i_process_login_resp(session, bnx2i_conn,2003						 qp->cq_cons_qe);2004			break;2005		case ISCSI_OP_SCSI_TMFUNC_RSP:2006			bnx2i_process_tmf_resp(session, bnx2i_conn,2007					       qp->cq_cons_qe);2008			break;2009		case ISCSI_OP_TEXT_RSP:2010			bnx2i_process_text_resp(session, bnx2i_conn,2011						qp->cq_cons_qe);2012			break;2013		case ISCSI_OP_LOGOUT_RSP:2014			bnx2i_process_logout_resp(session, bnx2i_conn,2015						  qp->cq_cons_qe);2016			break;2017		case ISCSI_OP_NOOP_IN:2018			if (bnx2i_process_nopin_mesg(session, bnx2i_conn,2019						     qp->cq_cons_qe))2020				tgt_async_msg = 1;2021			break;2022		case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:2023			bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,2024						       qp->cq_cons_qe);2025			break;2026		case ISCSI_OP_ASYNC_EVENT:2027			bnx2i_process_async_mesg(session, bnx2i_conn,2028						 qp->cq_cons_qe);2029			tgt_async_msg = 1;2030			break;2031		case ISCSI_OP_REJECT:2032			bnx2i_process_reject_mesg(session, bnx2i_conn,2033						  qp->cq_cons_qe);2034			break;2035		case ISCSI_OPCODE_CLEANUP_RESPONSE:2036			bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,2037						       qp->cq_cons_qe);2038			break;2039		default:2040			printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",2041					  nopin->op_code);2042		}2043 2044		ADD_STATS_64(hba, rx_pdus, 1);2045		ADD_STATS_64(hba, rx_bytes, nopin->data_length);2046done:2047		if (!tgt_async_msg) {2048			if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))2049				printk(KERN_ALERT "bnx2i (%s): no active cmd! "2050				       "op 0x%x\n",2051				       hba->netdev->name,2052				       nopin->op_code);2053			else2054				atomic_dec(&bnx2i_conn->ep->num_active_cmds);2055		}2056cqe_out:2057		/* clear out in production version only, till beta keep opcode2058		 * field intact, will be helpful in debugging (context dump)2059		 * nopin->op_code = 0;2060		 */2061		cqe_cnt++;2062		qp->cqe_exp_seq_sn++;2063		if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))2064			qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;2065 2066		if (qp->cq_cons_qe == qp->cq_last_qe) {2067			qp->cq_cons_qe = qp->cq_first_qe;2068			qp->cq_cons_idx = 0;2069		} else {2070			qp->cq_cons_qe++;2071			qp->cq_cons_idx++;2072		}2073	}2074out:2075	return cqe_cnt;2076}2077 2078/**2079 * bnx2i_fastpath_notification - process global event queue (KCQ)2080 * @hba:		adapter structure pointer2081 * @new_cqe_kcqe:	pointer to newly DMA'ed KCQE entry2082 *2083 * Fast path event notification handler, KCQ entry carries context id2084 *	of the connection that has 1 or more pending CQ entries2085 */2086static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,2087					struct iscsi_kcqe *new_cqe_kcqe)2088{2089	struct bnx2i_conn *bnx2i_conn;2090	u32 iscsi_cid;2091	int nxt_idx;2092 2093	iscsi_cid = new_cqe_kcqe->iscsi_conn_id;2094	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);2095 2096	if (!bnx2i_conn) {2097		printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);2098		return;2099	}2100	if (!bnx2i_conn->ep) {2101		printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);2102		return;2103	}2104 2105	bnx2i_process_new_cqes(bnx2i_conn);2106	nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,2107						CNIC_ARM_CQE_FP);2108	if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))2109		bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);2110}2111 2112 2113/**2114 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE2115 * @hba:		adapter structure pointer2116 * @update_kcqe:	kcqe pointer2117 *2118 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration2119 */2120static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,2121					   struct iscsi_kcqe *update_kcqe)2122{2123	struct bnx2i_conn *conn;2124	u32 iscsi_cid;2125 2126	iscsi_cid = update_kcqe->iscsi_conn_id;2127	conn = bnx2i_get_conn_from_id(hba, iscsi_cid);2128 2129	if (!conn) {2130		printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);2131		return;2132	}2133	if (!conn->ep) {2134		printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);2135		return;2136	}2137 2138	if (update_kcqe->completion_status) {2139		printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);2140		conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;2141	} else2142		conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;2143 2144	wake_up_interruptible(&conn->ep->ofld_wait);2145}2146 2147 2148/**2149 * bnx2i_recovery_que_add_conn - add connection to recovery queue2150 * @hba:		adapter structure pointer2151 * @bnx2i_conn:		iscsi connection2152 *2153 * Add connection to recovery queue and schedule adapter eh worker2154 */2155static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,2156					struct bnx2i_conn *bnx2i_conn)2157{2158	iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,2159			   ISCSI_ERR_CONN_FAILED);2160}2161 2162 2163/**2164 * bnx2i_process_tcp_error - process error notification on a given connection2165 *2166 * @hba: 		adapter structure pointer2167 * @tcp_err: 		tcp error kcqe pointer2168 *2169 * handles tcp level error notifications from FW.2170 */2171static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,2172				    struct iscsi_kcqe *tcp_err)2173{2174	struct bnx2i_conn *bnx2i_conn;2175	u32 iscsi_cid;2176 2177	iscsi_cid = tcp_err->iscsi_conn_id;2178	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);2179 2180	if (!bnx2i_conn) {2181		printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);2182		return;2183	}2184 2185	printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",2186			  iscsi_cid, tcp_err->completion_status);2187	bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);2188}2189 2190 2191/**2192 * bnx2i_process_iscsi_error - process error notification on a given connection2193 * @hba:		adapter structure pointer2194 * @iscsi_err:		iscsi error kcqe pointer2195 *2196 * handles iscsi error notifications from the FW. Firmware based in initial2197 *	handshake classifies iscsi protocol / TCP rfc violation into either2198 *	warning or error indications. If indication is of "Error" type, driver2199 *	will initiate session recovery for that connection/session. For2200 *	"Warning" type indication, driver will put out a system log message2201 *	(there will be only one message for each type for the life of the2202 *	session, this is to avoid un-necessarily overloading the system)2203 */2204static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,2205				      struct iscsi_kcqe *iscsi_err)2206{2207	struct bnx2i_conn *bnx2i_conn;2208	u32 iscsi_cid;2209	const char *additional_notice = "";2210	const char *message;2211	int need_recovery;2212	u64 err_mask64;2213 2214	iscsi_cid = iscsi_err->iscsi_conn_id;2215	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);2216	if (!bnx2i_conn) {2217		printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);2218		return;2219	}2220 2221	err_mask64 = (0x1ULL << iscsi_err->completion_status);2222 2223	if (err_mask64 & iscsi_error_mask) {2224		need_recovery = 0;2225		message = "iscsi_warning";2226	} else {2227		need_recovery = 1;2228		message = "iscsi_error";2229	}2230 2231	switch (iscsi_err->completion_status) {2232	case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:2233		additional_notice = "hdr digest err";2234		break;2235	case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:2236		additional_notice = "data digest err";2237		break;2238	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:2239		additional_notice = "wrong opcode rcvd";2240		break;2241	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:2242		additional_notice = "AHS len > 0 rcvd";2243		break;2244	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:2245		additional_notice = "invalid ITT rcvd";2246		break;2247	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:2248		additional_notice = "wrong StatSN rcvd";2249		break;2250	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:2251		additional_notice = "wrong DataSN rcvd";2252		break;2253	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:2254		additional_notice = "pend R2T violation";2255		break;2256	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:2257		additional_notice = "ERL0, UO";2258		break;2259	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:2260		additional_notice = "ERL0, U1";2261		break;2262	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:2263		additional_notice = "ERL0, U2";2264		break;2265	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:2266		additional_notice = "ERL0, U3";2267		break;2268	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:2269		additional_notice = "ERL0, U4";2270		break;2271	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:2272		additional_notice = "ERL0, U5";2273		break;2274	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:2275		additional_notice = "ERL0, U6";2276		break;2277	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:2278		additional_notice = "invalid resi len";2279		break;2280	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:2281		additional_notice = "MRDSL violation";2282		break;2283	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:2284		additional_notice = "F-bit not set";2285		break;2286	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:2287		additional_notice = "invalid TTT";2288		break;2289	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:2290		additional_notice = "invalid DataSN";2291		break;2292	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:2293		additional_notice = "burst len violation";2294		break;2295	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:2296		additional_notice = "buf offset violation";2297		break;2298	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:2299		additional_notice = "invalid LUN field";2300		break;2301	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:2302		additional_notice = "invalid R2TSN field";2303		break;2304#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 	\2305	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_02306	case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:2307		additional_notice = "invalid cmd len1";2308		break;2309#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 	\2310	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_12311	case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:2312		additional_notice = "invalid cmd len2";2313		break;2314	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:2315		additional_notice = "pend r2t exceeds MaxOutstandingR2T value";2316		break;2317	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:2318		additional_notice = "TTT is rsvd";2319		break;2320	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:2321		additional_notice = "MBL violation";2322		break;2323#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO 	\2324	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO2325	case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:2326		additional_notice = "data seg len != 0";2327		break;2328	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:2329		additional_notice = "reject pdu len error";2330		break;2331	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:2332		additional_notice = "async pdu len error";2333		break;2334	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:2335		additional_notice = "nopin pdu len error";2336		break;2337#define BNX2_ERR_PEND_R2T_IN_CLEANUP			\2338	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP2339	case BNX2_ERR_PEND_R2T_IN_CLEANUP:2340		additional_notice = "pend r2t in cleanup";2341		break;2342 2343	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:2344		additional_notice = "IP fragments rcvd";2345		break;2346	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:2347		additional_notice = "IP options error";2348		break;2349	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:2350		additional_notice = "urgent flag error";2351		break;2352	default:2353		printk(KERN_ALERT "iscsi_err - unknown err %x\n",2354				  iscsi_err->completion_status);2355	}2356 2357	if (need_recovery) {2358		iscsi_conn_printk(KERN_ALERT,2359				  bnx2i_conn->cls_conn->dd_data,2360				  "bnx2i: %s - %s\n",2361				  message, additional_notice);2362 2363		iscsi_conn_printk(KERN_ALERT,2364				  bnx2i_conn->cls_conn->dd_data,2365				  "conn_err - hostno %d conn %p, "2366				  "iscsi_cid %x cid %x\n",2367				  bnx2i_conn->hba->shost->host_no,2368				  bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,2369				  bnx2i_conn->ep->ep_cid);2370		bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);2371	} else2372		if (!test_and_set_bit(iscsi_err->completion_status,2373				      (void *) &bnx2i_conn->violation_notified))2374			iscsi_conn_printk(KERN_ALERT,2375					  bnx2i_conn->cls_conn->dd_data,2376					  "bnx2i: %s - %s\n",2377					  message, additional_notice);2378}2379 2380 2381/**2382 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion2383 * @hba:		adapter structure pointer2384 * @conn_destroy:	conn destroy kcqe pointer2385 *2386 * handles connection destroy completion request.2387 */2388static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,2389					    struct iscsi_kcqe *conn_destroy)2390{2391	struct bnx2i_endpoint *ep;2392 2393	ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);2394	if (!ep) {2395		printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "2396				  "offload request, unexpected completion\n");2397		return;2398	}2399 2400	if (hba != ep->hba) {2401		printk(KERN_ALERT "conn destroy- error hba mismatch\n");2402		return;2403	}2404 2405	if (conn_destroy->completion_status) {2406		printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");2407		ep->state = EP_STATE_CLEANUP_FAILED;2408	} else2409		ep->state = EP_STATE_CLEANUP_CMPL;2410	wake_up_interruptible(&ep->ofld_wait);2411}2412 2413 2414/**2415 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion2416 * @hba:		adapter structure pointer2417 * @ofld_kcqe:		conn offload kcqe pointer2418 *2419 * handles initial connection offload completion, ep_connect() thread is2420 *	woken-up to continue with LLP connect process2421 */2422static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,2423				    struct iscsi_kcqe *ofld_kcqe)2424{2425	u32 cid_addr;2426	struct bnx2i_endpoint *ep;2427 2428	ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);2429	if (!ep) {2430		printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");2431		return;2432	}2433 2434	if (hba != ep->hba) {2435		printk(KERN_ALERT "ofld_cmpl: error hba mismatch\n");2436		return;2437	}2438 2439	if (ofld_kcqe->completion_status) {2440		ep->state = EP_STATE_OFLD_FAILED;2441		if (ofld_kcqe->completion_status ==2442		    ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)2443			printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "2444				"to allocate iSCSI context resources\n",2445				hba->netdev->name);2446		else if (ofld_kcqe->completion_status ==2447			 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)2448			printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "2449				"opcode\n", hba->netdev->name);2450		else if (ofld_kcqe->completion_status ==2451			 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)2452			/* error status code valid only for 5771x chipset */2453			ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;2454		else2455			printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "2456				"error code %d\n", hba->netdev->name,2457				ofld_kcqe->completion_status);2458	} else {2459		ep->state = EP_STATE_OFLD_COMPL;2460		cid_addr = ofld_kcqe->iscsi_conn_context_id;2461		ep->ep_cid = cid_addr;2462		ep->qp.ctx_base = NULL;2463	}2464	wake_up_interruptible(&ep->ofld_wait);2465}2466 2467/**2468 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE2469 * @context:		adapter structure pointer2470 * @kcqe:		kcqe pointer2471 * @num_cqe:		number of kcqes to process2472 *2473 * Generic KCQ event handler/dispatcher2474 */2475static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],2476				u32 num_cqe)2477{2478	struct bnx2i_hba *hba = context;2479	int i = 0;2480	struct iscsi_kcqe *ikcqe = NULL;2481 2482	while (i < num_cqe) {2483		ikcqe = (struct iscsi_kcqe *) kcqe[i++];2484 2485		if (ikcqe->op_code ==2486		    ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)2487			bnx2i_fastpath_notification(hba, ikcqe);2488		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)2489			bnx2i_process_ofld_cmpl(hba, ikcqe);2490		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)2491			bnx2i_process_update_conn_cmpl(hba, ikcqe);2492		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {2493			if (ikcqe->completion_status !=2494			    ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)2495				bnx2i_iscsi_license_error(hba, ikcqe->\2496							  completion_status);2497			else {2498				set_bit(ADAPTER_STATE_UP, &hba->adapter_state);2499				bnx2i_get_link_state(hba);2500				printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "2501						 "ISCSI_INIT passed\n",2502						 (u8)hba->pcidev->bus->number,2503						 hba->pci_devno,2504						 (u8)hba->pci_func);2505 2506 2507			}2508		} else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)2509			bnx2i_process_conn_destroy_cmpl(hba, ikcqe);2510		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)2511			bnx2i_process_iscsi_error(hba, ikcqe);2512		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)2513			bnx2i_process_tcp_error(hba, ikcqe);2514		else2515			printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",2516					  ikcqe->op_code);2517	}2518}2519 2520 2521/**2522 * bnx2i_indicate_netevent - Generic netdev event handler2523 * @context:	adapter structure pointer2524 * @event:	event type2525 * @vlan_id:	vlans id - associated vlan id with this event2526 *2527 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,2528 *	NETDEV_GOING_DOWN and NETDEV_CHANGE2529 */2530static void bnx2i_indicate_netevent(void *context, unsigned long event,2531				    u16 vlan_id)2532{2533	struct bnx2i_hba *hba = context;2534 2535	/* Ignore all netevent coming from vlans */2536	if (vlan_id != 0)2537		return;2538 2539	switch (event) {2540	case NETDEV_UP:2541		if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))2542			bnx2i_send_fw_iscsi_init_msg(hba);2543		break;2544	case NETDEV_DOWN:2545		clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);2546		clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);2547		break;2548	case NETDEV_GOING_DOWN:2549		set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);2550		iscsi_host_for_each_session(hba->shost,2551					    bnx2i_drop_session);2552		break;2553	case NETDEV_CHANGE:2554		bnx2i_get_link_state(hba);2555		break;2556	default:2557		;2558	}2559}2560 2561 2562/**2563 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion2564 * @cm_sk: 		cnic sock structure pointer2565 *2566 * function callback exported via bnx2i - cnic driver interface to2567 *	indicate completion of option-2 TCP connect request.2568 */2569static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)2570{2571	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;2572 2573	if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))2574		ep->state = EP_STATE_CONNECT_FAILED;2575	else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))2576		ep->state = EP_STATE_CONNECT_COMPL;2577	else2578		ep->state = EP_STATE_CONNECT_FAILED;2579 2580	wake_up_interruptible(&ep->ofld_wait);2581}2582 2583 2584/**2585 * bnx2i_cm_close_cmpl - process tcp conn close completion2586 * @cm_sk:	cnic sock structure pointer2587 *2588 * function callback exported via bnx2i - cnic driver interface to2589 *	indicate completion of option-2 graceful TCP connect shutdown2590 */2591static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)2592{2593	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;2594 2595	ep->state = EP_STATE_DISCONN_COMPL;2596	wake_up_interruptible(&ep->ofld_wait);2597}2598 2599 2600/**2601 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion2602 * @cm_sk:	cnic sock structure pointer2603 *2604 * function callback exported via bnx2i - cnic driver interface to2605 *	indicate completion of option-2 abortive TCP connect termination2606 */2607static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)2608{2609	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;2610 2611	ep->state = EP_STATE_DISCONN_COMPL;2612	wake_up_interruptible(&ep->ofld_wait);2613}2614 2615 2616/**2617 * bnx2i_cm_remote_close - process received TCP FIN2618 * @cm_sk:	cnic sock structure pointer2619 *2620 * function callback exported via bnx2i - cnic driver interface to indicate2621 *	async TCP events such as FIN2622 */2623static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)2624{2625	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;2626 2627	ep->state = EP_STATE_TCP_FIN_RCVD;2628	if (ep->conn)2629		bnx2i_recovery_que_add_conn(ep->hba, ep->conn);2630}2631 2632/**2633 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup2634 * @cm_sk:	cnic sock structure pointer2635 *2636 * function callback exported via bnx2i - cnic driver interface to2637 *	indicate async TCP events (RST) sent by the peer.2638 */2639static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)2640{2641	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;2642	u32 old_state = ep->state;2643 2644	ep->state = EP_STATE_TCP_RST_RCVD;2645	if (old_state == EP_STATE_DISCONN_START)2646		wake_up_interruptible(&ep->ofld_wait);2647	else2648		if (ep->conn)2649			bnx2i_recovery_que_add_conn(ep->hba, ep->conn);2650}2651 2652 2653static int bnx2i_send_nl_mesg(void *context, u32 msg_type,2654			      char *buf, u16 buflen)2655{2656	struct bnx2i_hba *hba = context;2657	int rc;2658 2659	if (!hba)2660		return -ENODEV;2661 2662	rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,2663				msg_type, buf, buflen);2664	if (rc)2665		printk(KERN_ALERT "bnx2i: private nl message send error\n");2666 2667	return rc;2668}2669 2670 2671/*2672 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure2673 *			carrying callback function pointers2674 */2675struct cnic_ulp_ops bnx2i_cnic_cb = {2676	.cnic_init = bnx2i_ulp_init,2677	.cnic_exit = bnx2i_ulp_exit,2678	.cnic_start = bnx2i_start,2679	.cnic_stop = bnx2i_stop,2680	.indicate_kcqes = bnx2i_indicate_kcqe,2681	.indicate_netevent = bnx2i_indicate_netevent,2682	.cm_connect_complete = bnx2i_cm_connect_cmpl,2683	.cm_close_complete = bnx2i_cm_close_cmpl,2684	.cm_abort_complete = bnx2i_cm_abort_cmpl,2685	.cm_remote_close = bnx2i_cm_remote_close,2686	.cm_remote_abort = bnx2i_cm_remote_abort,2687	.iscsi_nl_send_msg = bnx2i_send_nl_mesg,2688	.cnic_get_stats = bnx2i_get_stats,2689	.owner = THIS_MODULE2690};2691 2692 2693/**2694 * bnx2i_map_ep_dbell_regs - map connection doorbell registers2695 * @ep: bnx2i endpoint2696 *2697 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these2698 *	register in BAR #0. Whereas in 57710 these register are accessed by2699 *	mapping BAR #12700 */2701int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)2702{2703	u32 cid_num;2704	u32 reg_off;2705	u32 first_l4l5;2706	u32 ctx_sz;2707	u32 config2;2708	resource_size_t reg_base;2709 2710	cid_num = bnx2i_get_cid_num(ep);2711 2712	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {2713		reg_base = pci_resource_start(ep->hba->pcidev,2714					      BNX2X_DOORBELL_PCI_BAR);2715		reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);2716		ep->qp.ctx_base = ioremap(reg_base + reg_off, 4);2717		if (!ep->qp.ctx_base)2718			return -ENOMEM;2719		goto arm_cq;2720	}2721 2722	if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&2723	    (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {2724		config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);2725		first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;2726		ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;2727		if (ctx_sz)2728			reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE2729				  + BNX2I_570X_PAGE_SIZE_DEFAULT *2730				  (((cid_num - first_l4l5) / ctx_sz) + 256);2731		else2732			reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);2733	} else2734		/* 5709 device in normal node and 5706/5708 devices */2735		reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);2736 2737	ep->qp.ctx_base = ioremap(ep->hba->reg_base + reg_off,2738					  MB_KERNEL_CTX_SIZE);2739	if (!ep->qp.ctx_base)2740		return -ENOMEM;2741 2742arm_cq:2743	bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);2744	return 0;2745}2746