drivers/scsi/bnx2i/bnx2i_hwi.c

   1 /* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver.
   2  *
   3  * Copyright (c) 2006 - 2013 Broadcom Corporation
   4  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
   5  * Copyright (c) 2007, 2008 Mike Christie
   6  * Copyright (c) 2014, QLogic Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * 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.com
  15  */
  16
  17 #include <linux/gfp.h>
  18 #include <scsi/scsi_tcq.h>
  19 #include <scsi/libiscsi.h>
  20 #include "bnx2i.h"
  21
  22 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
  23
  24 /**
  25  * bnx2i_get_cid_num - get cid from ep
  26  * @ep:         endpoint pointer
  27  *
  28  * Only applicable to 57710 family of devices
  29  */
  30 static 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         else
  37                 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 type
  44  * @hba:                Adapter for which adjustments is to be made
  45  *
  46  * Only applicable to 57710 family of devices
  47  */
  48 static 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 not
  63          * yield integral num of page buffers
  64          */
  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 state
  93  * @hba:        adapter instance pointer
  94  *
  95  * updates adapter structure flag based on netdev state
  96  */
  97 static 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         else
 102                 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
 103 }
 104
 105
 106 /**
 107  * bnx2i_iscsi_license_error - displays iscsi license related error message
 108  * @hba:                adapter instance pointer
 109  * @error_code:         error classification
 110  *
 111  * Puts out an error log when driver is unable to offload iscsi connection
 112  *      due to license restrictions
 113  */
 114 static 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 notification
 131  * @ep:         endpoint (transport identifier) structure
 132  * @action:     action, ARM or DISARM. For now only ARM_CQE is used
 133  *
 134  * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
 135  *      the driver. EQ event is generated CQ index is hit or at least 1 CQ is
 136  *      outstanding and on chip timer expires
 137  */
 138 int 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 writes
 150          * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
 151          * interrupts and other unwanted results
 152          */
 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 buffer
 184  * @bnx2i_conn:         iscsi connection on which RQ event occurred
 185  * @ptr:                driver buffer to which RQ buffer contents is to
 186  *                      be copied
 187  * @len:                length of valid data inside RQ buf
 188  *
 189  * Copies RQ buffer contents from shared (DMA'able) memory region to
 190  *      driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
 191  *      scsi sense info
 192  */
 193 void 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
 210 static 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 doorbell
 226  * @bnx2i_conn: iscsi connection on which event to post
 227  * @count:      number of RQ buffer being posted to chip
 228  *
 229  * No need to ring hardware doorbell for 57710 family of devices
 230  */
 231 void 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         } else
 246                 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 engine
 261  * @bnx2i_conn:         iscsi connection to which new SQ entries belong
 262  * @count:              number of SQ WQEs to post
 263  *
 264  * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
 265  *      of devices. For 5706/5708/5709 new SQ WQE count is written into the
 266  *      doorbell register
 267  */
 268 static 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         } else
 280                 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
 281 }
 282
 283
 284 /**
 285  * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
 286  * @bnx2i_conn: iscsi connection to which new SQ entries belong
 287  * @count:      number of SQ WQEs to post
 288  *
 289  * this routine will update SQ driver parameters and ring the doorbell
 290  */
 291 static 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                 else
 302                         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 hardware
 323  * @bnx2i_conn: iscsi connection
 324  * @task: transport layer's command structure pointer which is requesting
 325  *        a WQE to sent to chip for further processing
 326  *
 327  * prepare and post an iSCSI Login request WQE to CNIC firmware
 328  */
 329 int 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 hardware
 376  * @bnx2i_conn: iscsi connection
 377  * @mtask:      driver command structure which is requesting
 378  *              a WQE to sent to chip for further processing
 379  *
 380  * prepare and post an iSCSI Login request WQE to CNIC firmware
 381  */
 382 int 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 while
 411                          * was starting up.
 412                          *
 413                          * Note: In the case of a SCSI cmd timeout, the task's
 414                          *       sc is still active; hence ctask->sc != 0
 415                          *       In this case, the task must be aborted
 416                          */
 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                 else
 424                         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 hardware
 450  * @bnx2i_conn: iscsi connection
 451  * @mtask:      driver command structure which is requesting
 452  *              a WQE to sent to chip for further processing
 453  *
 454  * prepare and post an iSCSI Text request WQE to CNIC firmware
 455  */
 456 int 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 hardware
 498  * @bnx2i_conn: iscsi connection
 499  * @cmd:        driver command structure which is requesting
 500  *              a WQE to sent to chip for further processing
 501  *
 502  * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 503  */
 504 int 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 hardware
 520  * @bnx2i_conn:         iscsi connection
 521  * @task:               transport layer's command structure pointer which is
 522  *                      requesting a WQE to sent to chip for further processing
 523  * @datap:              payload buffer pointer
 524  * @data_len:           payload data length
 525  * @unsol:              indicated whether nopout pdu is unsolicited pdu or
 526  *                      in response to target's NOPIN w/ TTT != FFFFFFFF
 527  *
 528  * prepare and post a nopout request WQE to CNIC firmware
 529  */
 530 int 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 hardware
 582  * @bnx2i_conn: iscsi connection
 583  * @task:       transport layer's command structure pointer which is
 584  *              requesting a WQE to sent to chip for further processing
 585  *
 586  * prepare and post logout request WQE to CNIC firmware
 587  */
 588 int 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 hardware
 625  * @conn:       iscsi connection which requires iscsi parameter update
 626  *
 627  * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 628  */
 629 void 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         else
 647                 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 hardware
 681  * @t:  timer context used to fetch the endpoint (transport
 682  *      handle) structure pointer
 683  *
 684  * routine to handle connection offload/destroy request timeout
 685  */
 686 void 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
 705 static 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 request
 721  * @hba:        adapter structure pointer
 722  * @cmd:        driver command structure which is requesting
 723  *              a WQE to sent to chip for further processing
 724  *
 725  * prepares and posts CONN_OFLD_REQ1/2 KWQE
 726  */
 727 void 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 process
 745  * @hba:        adapter structure pointer
 746  * @ep:         endpoint (transport identifier) structure
 747  *
 748  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 749  *      iscsi connection context clean-up process
 750  */
 751 int 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         else
 766                 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 process
 780  * @hba:                adapter structure pointer
 781  * @ep:                 endpoint (transport identifier) structure
 782  *
 783  * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 784  */
 785 static 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 creation
 840  * @hba:                adapter structure pointer
 841  * @ep:                 endpoint (transport identifier) structure
 842  *
 843  * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 844  */
 845 static 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 process
 908  *
 909  * @hba:                adapter structure pointer
 910  * @ep:                 endpoint (transport identifier) structure
 911  *
 912  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 913  */
 914 int 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         else
 921                 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 function
 929  * @ep:         endpoint (transport identifier) structure
 930  *
 931  * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 932  *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
 933  *      PT in little endian format
 934  */
 935 static 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         else
 945                 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         else
 955                 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 for
 966                          * 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         else
 983                 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 for
 994                          * 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         else
1011                 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 for
1022                          * 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 pointer
1036  * @ep:         endpoint (transport identifier) structure
1037  *
1038  * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1039  *      memory for SQ/RQ/CQ and page tables. EP structure elements such
1040  *      as producer/consumer indexes/pointers, queue sizes and page table
1041  *      contents are setup
1042  */
1043 int 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
1169 mem_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 QP
1178  * @hba:        adapter structure pointer
1179  * @ep: endpoint (transport identifier) structure
1180  *
1181  * Free QP resources - SQ/RQ/CQ memory and page tables.
1182  */
1183 void 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/w
1235  * @hba:        adapter structure pointer
1236  *
1237  * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1238  *      This results in iSCSi support validation and on-chip context manager
1239  *      initialization.  Firmware completes this handshake with a CQE carrying
1240  *      the result of iscsi support validation. Parameter carried by
1241  *      iscsi init request determines the number of offloaded connection and
1242  *      tolerance level for iscsi protocol violation this hba/chip can support
1243  */
1244 int 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         } else
1308                 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         } else
1315                 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 session
1331  * @bnx2i_conn: bnx2i connection
1332  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1333  *
1334  * process SCSI CMD Response CQE & complete the request to SCSI-ML
1335  */
1336 int 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
1416 done:
1417         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1418                              conn->data, datalen);
1419 fail:
1420         spin_unlock_bh(&session->back_lock);
1421         return 0;
1422 }
1423
1424
1425 /**
1426  * bnx2i_process_login_resp - this function handles iscsi login response
1427  * @session:            iscsi session pointer
1428  * @bnx2i_conn:         iscsi connection pointer
1429  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1430  *
1431  * process Login Response CQE & complete it to open-iscsi user daemon
1432  */
1433 static 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);
1487 done:
1488         spin_unlock(&session->back_lock);
1489         return 0;
1490 }
1491
1492
1493 /**
1494  * bnx2i_process_text_resp - this function handles iscsi text response
1495  * @session:    iscsi session pointer
1496  * @bnx2i_conn: iscsi connection pointer
1497  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1498  *
1499  * process iSCSI Text Response CQE&  complete it to open-iscsi user daemon
1500  */
1501 static 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);
1548 done:
1549         spin_unlock(&session->back_lock);
1550         return 0;
1551 }
1552
1553
1554 /**
1555  * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1556  * @session:            iscsi session pointer
1557  * @bnx2i_conn:         iscsi connection pointer
1558  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1559  *
1560  * process iSCSI TMF Response CQE and wake up the driver eh thread.
1561  */
1562 static 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);
1587 done:
1588         spin_unlock(&session->back_lock);
1589         return 0;
1590 }
1591
1592 /**
1593  * bnx2i_process_logout_resp - this function handles iscsi logout response
1594  * @session:            iscsi session pointer
1595  * @bnx2i_conn:         iscsi connection pointer
1596  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1597  *
1598  * process iSCSI Logout Response CQE & make function call to
1599  * notify the user daemon.
1600  */
1601 static 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;
1634 done:
1635         spin_unlock(&session->back_lock);
1636         return 0;
1637 }
1638
1639 /**
1640  * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1641  * @session:            iscsi session pointer
1642  * @bnx2i_conn:         iscsi connection pointer
1643  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1644  *
1645  * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1646  */
1647 static 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 recvd
1666  * @bnx2i_conn: iscsi connection
1667  *
1668  * Firmware advances RQ producer index for every unsolicited PDU even if
1669  *      payload data length is '0'. This function makes corresponding
1670  *      adjustments on the driver side to match this f/w behavior
1671  */
1672 static 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 CQE
1682  * @session:            iscsi session pointer
1683  * @bnx2i_conn:         iscsi connection pointer
1684  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1685  *
1686  * process iSCSI target's proactive iSCSI NOPIN request
1687  */
1688 static 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         }
1724 done:
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 message
1734  * @session:            iscsi session pointer
1735  * @bnx2i_conn:         iscsi connection pointer
1736  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1737  *
1738  * process iSCSI ASYNC Message
1739  */
1740 static 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 pdu
1784  * @session:            iscsi session pointer
1785  * @bnx2i_conn:         iscsi connection pointer
1786  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1787  *
1788  * process iSCSI REJECT message
1789  */
1790 static 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         } else
1803                 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 completion
1821  * @session:            iscsi session pointer
1822  * @bnx2i_conn:         iscsi connection pointer
1823  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1824  *
1825  * process command cleanup response CQE during conn shutdown or error recovery
1826  */
1827 static 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 ios
1849  *
1850  * @arg:        ptr to bnx2i_percpu_info structure
1851  */
1852 int 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 thread
1889  * @session:            iscsi session
1890  * @bnx2i_conn:         bnx2i connection
1891  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1892  *
1893  * this function is called by generic KCQ handler to queue all pending cmd
1894  * completion CQEs
1895  *
1896  * The implementation is to queue the cmd response based on the
1897  * last recorded command for the given connection.  The
1898  * cpu_id gets recorded upon task_xmit.  No out-of-order completion!
1899  */
1900 static 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(sc->request));
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         } else
1940                 rc = -ENOMEM;
1941 err:
1942         spin_unlock(&p->p_work_lock);
1943         bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
1944 done:
1945         return rc;
1946 }
1947
1948
1949 /**
1950  * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1951  * @bnx2i_conn:         bnx2i connection
1952  *
1953  * this function is called by generic KCQ handler to process all pending CQE's
1954  */
1955 static 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_SUSPEND_BIT, &conn->suspend_rx))) {
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 cmds
1998                            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);
2046 done:
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                         else
2054                                 atomic_dec(&bnx2i_conn->ep->num_active_cmds);
2055                 }
2056 cqe_out:
2057                 /* clear out in production version only, till beta keep opcode
2058                  * 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         }
2074 out:
2075         return cqe_cnt;
2076 }
2077
2078 /**
2079  * bnx2i_fastpath_notification - process global event queue (KCQ)
2080  * @hba:                adapter structure pointer
2081  * @new_cqe_kcqe:       pointer to newly DMA'ed KCQE entry
2082  *
2083  * Fast path event notification handler, KCQ entry carries context id
2084  *      of the connection that has 1 or more pending CQ entries
2085  */
2086 static 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 KCQE
2115  * @hba:                adapter structure pointer
2116  * @update_kcqe:        kcqe pointer
2117  *
2118  * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
2119  */
2120 static 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         } else
2142                 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 queue
2150  * @hba:                adapter structure pointer
2151  * @bnx2i_conn:         iscsi connection
2152  *
2153  * Add connection to recovery queue and schedule adapter eh worker
2154  */
2155 static 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 connection
2165  *
2166  * @hba:                adapter structure pointer
2167  * @tcp_err:            tcp error kcqe pointer
2168  *
2169  * handles tcp level error notifications from FW.
2170  */
2171 static 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 connection
2193  * @hba:                adapter structure pointer
2194  * @iscsi_err:          iscsi error kcqe pointer
2195  *
2196  * handles iscsi error notifications from the FW. Firmware based in initial
2197  *      handshake classifies iscsi protocol / TCP rfc violation into either
2198  *      warning or error indications. If indication is of "Error" type, driver
2199  *      will initiate session recovery for that connection/session. For
2200  *      "Warning" type indication, driver will put out a system log message
2201  *      (there will be only one message for each type for the life of the
2202  *      session, this is to avoid un-necessarily overloading the system)
2203  */
2204 static 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         char warn_notice[] = "iscsi_warning";
2210         char error_notice[] = "iscsi_error";
2211         char additional_notice[64];
2212         char *message;
2213         int need_recovery;
2214         u64 err_mask64;
2215
2216         iscsi_cid = iscsi_err->iscsi_conn_id;
2217         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2218         if (!bnx2i_conn) {
2219                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2220                 return;
2221         }
2222
2223         err_mask64 = (0x1ULL << iscsi_err->completion_status);
2224
2225         if (err_mask64 & iscsi_error_mask) {
2226                 need_recovery = 0;
2227                 message = warn_notice;
2228         } else {
2229                 need_recovery = 1;
2230                 message = error_notice;
2231         }
2232
2233         switch (iscsi_err->completion_status) {
2234         case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
2235                 strcpy(additional_notice, "hdr digest err");
2236                 break;
2237         case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
2238                 strcpy(additional_notice, "data digest err");
2239                 break;
2240         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
2241                 strcpy(additional_notice, "wrong opcode rcvd");
2242                 break;
2243         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
2244                 strcpy(additional_notice, "AHS len > 0 rcvd");
2245                 break;
2246         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
2247                 strcpy(additional_notice, "invalid ITT rcvd");
2248                 break;
2249         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
2250                 strcpy(additional_notice, "wrong StatSN rcvd");
2251                 break;
2252         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
2253                 strcpy(additional_notice, "wrong DataSN rcvd");
2254                 break;
2255         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
2256                 strcpy(additional_notice, "pend R2T violation");
2257                 break;
2258         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
2259                 strcpy(additional_notice, "ERL0, UO");
2260                 break;
2261         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
2262                 strcpy(additional_notice, "ERL0, U1");
2263                 break;
2264         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
2265                 strcpy(additional_notice, "ERL0, U2");
2266                 break;
2267         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
2268                 strcpy(additional_notice, "ERL0, U3");
2269                 break;
2270         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
2271                 strcpy(additional_notice, "ERL0, U4");
2272                 break;
2273         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
2274                 strcpy(additional_notice, "ERL0, U5");
2275                 break;
2276         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
2277                 strcpy(additional_notice, "ERL0, U6");
2278                 break;
2279         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
2280                 strcpy(additional_notice, "invalid resi len");
2281                 break;
2282         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
2283                 strcpy(additional_notice, "MRDSL violation");
2284                 break;
2285         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
2286                 strcpy(additional_notice, "F-bit not set");
2287                 break;
2288         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2289                 strcpy(additional_notice, "invalid TTT");
2290                 break;
2291         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2292                 strcpy(additional_notice, "invalid DataSN");
2293                 break;
2294         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2295                 strcpy(additional_notice, "burst len violation");
2296                 break;
2297         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2298                 strcpy(additional_notice, "buf offset violation");
2299                 break;
2300         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2301                 strcpy(additional_notice, "invalid LUN field");
2302                 break;
2303         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2304                 strcpy(additional_notice, "invalid R2TSN field");
2305                 break;
2306 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0       \
2307         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2308         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2309                 strcpy(additional_notice, "invalid cmd len1");
2310                 break;
2311 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1       \
2312         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2313         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2314                 strcpy(additional_notice, "invalid cmd len2");
2315                 break;
2316         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2317                 strcpy(additional_notice,
2318                        "pend r2t exceeds MaxOutstandingR2T value");
2319                 break;
2320         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2321                 strcpy(additional_notice, "TTT is rsvd");
2322                 break;
2323         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2324                 strcpy(additional_notice, "MBL violation");
2325                 break;
2326 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO         \
2327         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2328         case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2329                 strcpy(additional_notice, "data seg len != 0");
2330                 break;
2331         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2332                 strcpy(additional_notice, "reject pdu len error");
2333                 break;
2334         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2335                 strcpy(additional_notice, "async pdu len error");
2336                 break;
2337         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2338                 strcpy(additional_notice, "nopin pdu len error");
2339                 break;
2340 #define BNX2_ERR_PEND_R2T_IN_CLEANUP                    \
2341         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2342         case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2343                 strcpy(additional_notice, "pend r2t in cleanup");
2344                 break;
2345
2346         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2347                 strcpy(additional_notice, "IP fragments rcvd");
2348                 break;
2349         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2350                 strcpy(additional_notice, "IP options error");
2351                 break;
2352         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2353                 strcpy(additional_notice, "urgent flag error");
2354                 break;
2355         default:
2356                 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2357                                   iscsi_err->completion_status);
2358         }
2359
2360         if (need_recovery) {
2361                 iscsi_conn_printk(KERN_ALERT,
2362                                   bnx2i_conn->cls_conn->dd_data,
2363                                   "bnx2i: %s - %s\n",
2364                                   message, additional_notice);
2365
2366                 iscsi_conn_printk(KERN_ALERT,
2367                                   bnx2i_conn->cls_conn->dd_data,
2368                                   "conn_err - hostno %d conn %p, "
2369                                   "iscsi_cid %x cid %x\n",
2370                                   bnx2i_conn->hba->shost->host_no,
2371                                   bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2372                                   bnx2i_conn->ep->ep_cid);
2373                 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2374         } else
2375                 if (!test_and_set_bit(iscsi_err->completion_status,
2376                                       (void *) &bnx2i_conn->violation_notified))
2377                         iscsi_conn_printk(KERN_ALERT,
2378                                           bnx2i_conn->cls_conn->dd_data,
2379                                           "bnx2i: %s - %s\n",
2380                                           message, additional_notice);
2381 }
2382
2383
2384 /**
2385  * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2386  * @hba:                adapter structure pointer
2387  * @conn_destroy:       conn destroy kcqe pointer
2388  *
2389  * handles connection destroy completion request.
2390  */
2391 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2392                                             struct iscsi_kcqe *conn_destroy)
2393 {
2394         struct bnx2i_endpoint *ep;
2395
2396         ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2397         if (!ep) {
2398                 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2399                                   "offload request, unexpected completion\n");
2400                 return;
2401         }
2402
2403         if (hba != ep->hba) {
2404                 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2405                 return;
2406         }
2407
2408         if (conn_destroy->completion_status) {
2409                 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2410                 ep->state = EP_STATE_CLEANUP_FAILED;
2411         } else
2412                 ep->state = EP_STATE_CLEANUP_CMPL;
2413         wake_up_interruptible(&ep->ofld_wait);
2414 }
2415
2416
2417 /**
2418  * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2419  * @hba:                adapter structure pointer
2420  * @ofld_kcqe:          conn offload kcqe pointer
2421  *
2422  * handles initial connection offload completion, ep_connect() thread is
2423  *      woken-up to continue with LLP connect process
2424  */
2425 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2426                                     struct iscsi_kcqe *ofld_kcqe)
2427 {
2428         u32 cid_addr;
2429         struct bnx2i_endpoint *ep;
2430
2431         ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2432         if (!ep) {
2433                 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2434                 return;
2435         }
2436
2437         if (hba != ep->hba) {
2438                 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2439                 return;
2440         }
2441
2442         if (ofld_kcqe->completion_status) {
2443                 ep->state = EP_STATE_OFLD_FAILED;
2444                 if (ofld_kcqe->completion_status ==
2445                     ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2446                         printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
2447                                 "to allocate iSCSI context resources\n",
2448                                 hba->netdev->name);
2449                 else if (ofld_kcqe->completion_status ==
2450                          ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
2451                         printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2452                                 "opcode\n", hba->netdev->name);
2453                 else if (ofld_kcqe->completion_status ==
2454                          ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
2455                         /* error status code valid only for 5771x chipset */
2456                         ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
2457                 else
2458                         printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2459                                 "error code %d\n", hba->netdev->name,
2460                                 ofld_kcqe->completion_status);
2461         } else {
2462                 ep->state = EP_STATE_OFLD_COMPL;
2463                 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2464                 ep->ep_cid = cid_addr;
2465                 ep->qp.ctx_base = NULL;
2466         }
2467         wake_up_interruptible(&ep->ofld_wait);
2468 }
2469
2470 /**
2471  * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2472  * @context:            adapter structure pointer
2473  * @kcqe:               kcqe pointer
2474  * @num_cqe:            number of kcqes to process
2475  *
2476  * Generic KCQ event handler/dispatcher
2477  */
2478 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2479                                 u32 num_cqe)
2480 {
2481         struct bnx2i_hba *hba = context;
2482         int i = 0;
2483         struct iscsi_kcqe *ikcqe = NULL;
2484
2485         while (i < num_cqe) {
2486                 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2487
2488                 if (ikcqe->op_code ==
2489                     ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2490                         bnx2i_fastpath_notification(hba, ikcqe);
2491                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2492                         bnx2i_process_ofld_cmpl(hba, ikcqe);
2493                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2494                         bnx2i_process_update_conn_cmpl(hba, ikcqe);
2495                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2496                         if (ikcqe->completion_status !=
2497                             ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2498                                 bnx2i_iscsi_license_error(hba, ikcqe->\
2499                                                           completion_status);
2500                         else {
2501                                 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2502                                 bnx2i_get_link_state(hba);
2503                                 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2504                                                  "ISCSI_INIT passed\n",
2505                                                  (u8)hba->pcidev->bus->number,
2506                                                  hba->pci_devno,
2507                                                  (u8)hba->pci_func);
2508
2509
2510                         }
2511                 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2512                         bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2513                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2514                         bnx2i_process_iscsi_error(hba, ikcqe);
2515                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2516                         bnx2i_process_tcp_error(hba, ikcqe);
2517                 else
2518                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2519                                           ikcqe->op_code);
2520         }
2521 }
2522
2523
2524 /**
2525  * bnx2i_indicate_netevent - Generic netdev event handler
2526  * @context:    adapter structure pointer
2527  * @event:      event type
2528  * @vlan_id:    vlans id - associated vlan id with this event
2529  *
2530  * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2531  *      NETDEV_GOING_DOWN and NETDEV_CHANGE
2532  */
2533 static void bnx2i_indicate_netevent(void *context, unsigned long event,
2534                                     u16 vlan_id)
2535 {
2536         struct bnx2i_hba *hba = context;
2537
2538         /* Ignore all netevent coming from vlans */
2539         if (vlan_id != 0)
2540                 return;
2541
2542         switch (event) {
2543         case NETDEV_UP:
2544                 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2545                         bnx2i_send_fw_iscsi_init_msg(hba);
2546                 break;
2547         case NETDEV_DOWN:
2548                 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2549                 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2550                 break;
2551         case NETDEV_GOING_DOWN:
2552                 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2553                 iscsi_host_for_each_session(hba->shost,
2554                                             bnx2i_drop_session);
2555                 break;
2556         case NETDEV_CHANGE:
2557                 bnx2i_get_link_state(hba);
2558                 break;
2559         default:
2560                 ;
2561         }
2562 }
2563
2564
2565 /**
2566  * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2567  * @cm_sk:              cnic sock structure pointer
2568  *
2569  * function callback exported via bnx2i - cnic driver interface to
2570  *      indicate completion of option-2 TCP connect request.
2571  */
2572 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2573 {
2574         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2575
2576         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2577                 ep->state = EP_STATE_CONNECT_FAILED;
2578         else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2579                 ep->state = EP_STATE_CONNECT_COMPL;
2580         else
2581                 ep->state = EP_STATE_CONNECT_FAILED;
2582
2583         wake_up_interruptible(&ep->ofld_wait);
2584 }
2585
2586
2587 /**
2588  * bnx2i_cm_close_cmpl - process tcp conn close completion
2589  * @cm_sk:      cnic sock structure pointer
2590  *
2591  * function callback exported via bnx2i - cnic driver interface to
2592  *      indicate completion of option-2 graceful TCP connect shutdown
2593  */
2594 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2595 {
2596         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2597
2598         ep->state = EP_STATE_DISCONN_COMPL;
2599         wake_up_interruptible(&ep->ofld_wait);
2600 }
2601
2602
2603 /**
2604  * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2605  * @cm_sk:      cnic sock structure pointer
2606  *
2607  * function callback exported via bnx2i - cnic driver interface to
2608  *      indicate completion of option-2 abortive TCP connect termination
2609  */
2610 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2611 {
2612         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2613
2614         ep->state = EP_STATE_DISCONN_COMPL;
2615         wake_up_interruptible(&ep->ofld_wait);
2616 }
2617
2618
2619 /**
2620  * bnx2i_cm_remote_close - process received TCP FIN
2621  * @cm_sk:      cnic sock structure pointer
2622  *
2623  * function callback exported via bnx2i - cnic driver interface to indicate
2624  *      async TCP events such as FIN
2625  */
2626 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2627 {
2628         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2629
2630         ep->state = EP_STATE_TCP_FIN_RCVD;
2631         if (ep->conn)
2632                 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2633 }
2634
2635 /**
2636  * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2637  * @cm_sk:      cnic sock structure pointer
2638  *
2639  * function callback exported via bnx2i - cnic driver interface to
2640  *      indicate async TCP events (RST) sent by the peer.
2641  */
2642 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2643 {
2644         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2645         u32 old_state = ep->state;
2646
2647         ep->state = EP_STATE_TCP_RST_RCVD;
2648         if (old_state == EP_STATE_DISCONN_START)
2649                 wake_up_interruptible(&ep->ofld_wait);
2650         else
2651                 if (ep->conn)
2652                         bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2653 }
2654
2655
2656 static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
2657                               char *buf, u16 buflen)
2658 {
2659         struct bnx2i_hba *hba = context;
2660         int rc;
2661
2662         if (!hba)
2663                 return -ENODEV;
2664
2665         rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2666                                 msg_type, buf, buflen);
2667         if (rc)
2668                 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2669
2670         return rc;
2671 }
2672
2673
2674 /*
2675  * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2676  *                      carrying callback function pointers
2677  */
2678 struct cnic_ulp_ops bnx2i_cnic_cb = {
2679         .cnic_init = bnx2i_ulp_init,
2680         .cnic_exit = bnx2i_ulp_exit,
2681         .cnic_start = bnx2i_start,
2682         .cnic_stop = bnx2i_stop,
2683         .indicate_kcqes = bnx2i_indicate_kcqe,
2684         .indicate_netevent = bnx2i_indicate_netevent,
2685         .cm_connect_complete = bnx2i_cm_connect_cmpl,
2686         .cm_close_complete = bnx2i_cm_close_cmpl,
2687         .cm_abort_complete = bnx2i_cm_abort_cmpl,
2688         .cm_remote_close = bnx2i_cm_remote_close,
2689         .cm_remote_abort = bnx2i_cm_remote_abort,
2690         .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2691         .cnic_get_stats = bnx2i_get_stats,
2692         .owner = THIS_MODULE
2693 };
2694
2695
2696 /**
2697  * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2698  * @ep: bnx2i endpoint
2699  *
2700  * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2701  *      register in BAR #0. Whereas in 57710 these register are accessed by
2702  *      mapping BAR #1
2703  */
2704 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2705 {
2706         u32 cid_num;
2707         u32 reg_off;
2708         u32 first_l4l5;
2709         u32 ctx_sz;
2710         u32 config2;
2711         resource_size_t reg_base;
2712
2713         cid_num = bnx2i_get_cid_num(ep);
2714
2715         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2716                 reg_base = pci_resource_start(ep->hba->pcidev,
2717                                               BNX2X_DOORBELL_PCI_BAR);
2718                 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
2719                 ep->qp.ctx_base = ioremap(reg_base + reg_off, 4);
2720                 if (!ep->qp.ctx_base)
2721                         return -ENOMEM;
2722                 goto arm_cq;
2723         }
2724
2725         if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2726             (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2727                 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2728                 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2729                 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2730                 if (ctx_sz)
2731                         reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2732                                   + BNX2I_570X_PAGE_SIZE_DEFAULT *
2733                                   (((cid_num - first_l4l5) / ctx_sz) + 256);
2734                 else
2735                         reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2736         } else
2737                 /* 5709 device in normal node and 5706/5708 devices */
2738                 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2739
2740         ep->qp.ctx_base = ioremap(ep->hba->reg_base + reg_off,
2741                                           MB_KERNEL_CTX_SIZE);
2742         if (!ep->qp.ctx_base)
2743                 return -ENOMEM;
2744
2745 arm_cq:
2746         bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2747         return 0;
2748 }