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  * @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  * @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         mmiowb();
 257 }
 258
 259
 260 /**
 261  * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
 262  * @conn:               iscsi connection to which new SQ entries belong
 263  * @count:              number of SQ WQEs to post
 264  *
 265  * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
 266  *      of devices. For 5706/5708/5709 new SQ WQE count is written into the
 267  *      doorbell register
 268  */
 269 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
 270 {
 271         struct bnx2i_5771x_sq_rq_db *sq_db;
 272         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 273
 274         atomic_inc(&ep->num_active_cmds);
 275         wmb();  /* flush SQ WQE memory before the doorbell is rung */
 276         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
 277                 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
 278                 sq_db->prod_idx = ep->qp.sq_prod_idx;
 279                 bnx2i_ring_577xx_doorbell(bnx2i_conn);
 280         } else
 281                 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
 282
 283         mmiowb(); /* flush posted PCI writes */
 284 }
 285
 286
 287 /**
 288  * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
 289  * @conn:       iscsi connection to which new SQ entries belong
 290  * @count:      number of SQ WQEs to post
 291  *
 292  * this routine will update SQ driver parameters and ring the doorbell
 293  */
 294 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
 295                                               int count)
 296 {
 297         int tmp_cnt;
 298
 299         if (count == 1) {
 300                 if (bnx2i_conn->ep->qp.sq_prod_qe ==
 301                     bnx2i_conn->ep->qp.sq_last_qe)
 302                         bnx2i_conn->ep->qp.sq_prod_qe =
 303                                                 bnx2i_conn->ep->qp.sq_first_qe;
 304                 else
 305                         bnx2i_conn->ep->qp.sq_prod_qe++;
 306         } else {
 307                 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
 308                     bnx2i_conn->ep->qp.sq_last_qe)
 309                         bnx2i_conn->ep->qp.sq_prod_qe += count;
 310                 else {
 311                         tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
 312                                 bnx2i_conn->ep->qp.sq_prod_qe;
 313                         bnx2i_conn->ep->qp.sq_prod_qe =
 314                                 &bnx2i_conn->ep->qp.sq_first_qe[count -
 315                                                                 (tmp_cnt + 1)];
 316                 }
 317         }
 318         bnx2i_conn->ep->qp.sq_prod_idx += count;
 319         /* Ring the doorbell */
 320         bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
 321 }
 322
 323
 324 /**
 325  * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
 326  * @conn:       iscsi connection
 327  * @cmd:        driver command structure which is requesting
 328  *              a WQE to sent to chip for further processing
 329  *
 330  * prepare and post an iSCSI Login request WQE to CNIC firmware
 331  */
 332 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
 333                            struct iscsi_task *task)
 334 {
 335         struct bnx2i_login_request *login_wqe;
 336         struct iscsi_login_req *login_hdr;
 337         u32 dword;
 338
 339         login_hdr = (struct iscsi_login_req *)task->hdr;
 340         login_wqe = (struct bnx2i_login_request *)
 341                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 342
 343         login_wqe->op_code = login_hdr->opcode;
 344         login_wqe->op_attr = login_hdr->flags;
 345         login_wqe->version_max = login_hdr->max_version;
 346         login_wqe->version_min = login_hdr->min_version;
 347         login_wqe->data_length = ntoh24(login_hdr->dlength);
 348         login_wqe->isid_lo = *((u32 *) login_hdr->isid);
 349         login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
 350         login_wqe->tsih = login_hdr->tsih;
 351         login_wqe->itt = task->itt |
 352                 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
 353         login_wqe->cid = login_hdr->cid;
 354
 355         login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
 356         login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
 357         login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
 358
 359         login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
 360         login_wqe->resp_bd_list_addr_hi =
 361                 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
 362
 363         dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
 364                  (bnx2i_conn->gen_pdu.resp_buf_size <<
 365                   ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
 366         login_wqe->resp_buffer = dword;
 367         login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
 368         login_wqe->bd_list_addr_hi =
 369                 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
 370         login_wqe->num_bds = 1;
 371         login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 372
 373         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 374         return 0;
 375 }
 376
 377 /**
 378  * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
 379  * @conn:       iscsi connection
 380  * @mtask:      driver command structure which is requesting
 381  *              a WQE to sent to chip for further processing
 382  *
 383  * prepare and post an iSCSI Login request WQE to CNIC firmware
 384  */
 385 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
 386                          struct iscsi_task *mtask)
 387 {
 388         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
 389         struct iscsi_tm *tmfabort_hdr;
 390         struct scsi_cmnd *ref_sc;
 391         struct iscsi_task *ctask;
 392         struct bnx2i_tmf_request *tmfabort_wqe;
 393         u32 dword;
 394         u32 scsi_lun[2];
 395
 396         tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
 397         tmfabort_wqe = (struct bnx2i_tmf_request *)
 398                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 399
 400         tmfabort_wqe->op_code = tmfabort_hdr->opcode;
 401         tmfabort_wqe->op_attr = tmfabort_hdr->flags;
 402
 403         tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
 404         tmfabort_wqe->reserved2 = 0;
 405         tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
 406
 407         switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
 408         case ISCSI_TM_FUNC_ABORT_TASK:
 409         case ISCSI_TM_FUNC_TASK_REASSIGN:
 410                 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
 411                 if (!ctask || !ctask->sc)
 412                         /*
 413                          * the iscsi layer must have completed the cmd while
 414                          * was starting up.
 415                          *
 416                          * Note: In the case of a SCSI cmd timeout, the task's
 417                          *       sc is still active; hence ctask->sc != 0
 418                          *       In this case, the task must be aborted
 419                          */
 420                         return 0;
 421
 422                 ref_sc = ctask->sc;
 423                 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
 424                         dword = (ISCSI_TASK_TYPE_WRITE <<
 425                                  ISCSI_CMD_REQUEST_TYPE_SHIFT);
 426                 else
 427                         dword = (ISCSI_TASK_TYPE_READ <<
 428                                  ISCSI_CMD_REQUEST_TYPE_SHIFT);
 429                 tmfabort_wqe->ref_itt = (dword |
 430                                         (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
 431                 break;
 432         default:
 433                 tmfabort_wqe->ref_itt = RESERVED_ITT;
 434         }
 435         memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
 436         tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
 437         tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
 438
 439         tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
 440
 441         tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 442         tmfabort_wqe->bd_list_addr_hi = (u32)
 443                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 444         tmfabort_wqe->num_bds = 1;
 445         tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 446
 447         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 448         return 0;
 449 }
 450
 451 /**
 452  * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
 453  * @conn:       iscsi connection
 454  * @mtask:      driver command structure which is requesting
 455  *              a WQE to sent to chip for further processing
 456  *
 457  * prepare and post an iSCSI Text request WQE to CNIC firmware
 458  */
 459 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
 460                           struct iscsi_task *mtask)
 461 {
 462         struct bnx2i_text_request *text_wqe;
 463         struct iscsi_text *text_hdr;
 464         u32 dword;
 465
 466         text_hdr = (struct iscsi_text *)mtask->hdr;
 467         text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
 468
 469         memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
 470
 471         text_wqe->op_code = text_hdr->opcode;
 472         text_wqe->op_attr = text_hdr->flags;
 473         text_wqe->data_length = ntoh24(text_hdr->dlength);
 474         text_wqe->itt = mtask->itt |
 475                 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
 476         text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
 477
 478         text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
 479
 480         text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
 481         text_wqe->resp_bd_list_addr_hi =
 482                         (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
 483
 484         dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
 485                  (bnx2i_conn->gen_pdu.resp_buf_size <<
 486                   ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
 487         text_wqe->resp_buffer = dword;
 488         text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
 489         text_wqe->bd_list_addr_hi =
 490                         (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
 491         text_wqe->num_bds = 1;
 492         text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 493
 494         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 495         return 0;
 496 }
 497
 498
 499 /**
 500  * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
 501  * @conn:       iscsi connection
 502  * @cmd:        driver command structure which is requesting
 503  *              a WQE to sent to chip for further processing
 504  *
 505  * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
 506  */
 507 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
 508                              struct bnx2i_cmd *cmd)
 509 {
 510         struct bnx2i_cmd_request *scsi_cmd_wqe;
 511
 512         scsi_cmd_wqe = (struct bnx2i_cmd_request *)
 513                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 514         memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
 515         scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 516
 517         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 518         return 0;
 519 }
 520
 521 /**
 522  * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
 523  * @conn:               iscsi connection
 524  * @cmd:                driver command structure which is requesting
 525  *                      a WQE to sent to chip for further processing
 526  * @datap:              payload buffer pointer
 527  * @data_len:           payload data length
 528  * @unsol:              indicated whether nopout pdu is unsolicited pdu or
 529  *                      in response to target's NOPIN w/ TTT != FFFFFFFF
 530  *
 531  * prepare and post a nopout request WQE to CNIC firmware
 532  */
 533 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
 534                             struct iscsi_task *task,
 535                             char *datap, int data_len, int unsol)
 536 {
 537         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
 538         struct bnx2i_nop_out_request *nopout_wqe;
 539         struct iscsi_nopout *nopout_hdr;
 540
 541         nopout_hdr = (struct iscsi_nopout *)task->hdr;
 542         nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
 543
 544         memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
 545
 546         nopout_wqe->op_code = nopout_hdr->opcode;
 547         nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
 548         memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
 549
 550         /* 57710 requires LUN field to be swapped */
 551         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 552                 swap(nopout_wqe->lun[0], nopout_wqe->lun[1]);
 553
 554         nopout_wqe->itt = ((u16)task->itt |
 555                            (ISCSI_TASK_TYPE_MPATH <<
 556                             ISCSI_TMF_REQUEST_TYPE_SHIFT));
 557         nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
 558         nopout_wqe->flags = 0;
 559         if (!unsol)
 560                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 561         else if (nopout_hdr->itt == RESERVED_ITT)
 562                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
 563
 564         nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
 565         nopout_wqe->data_length = data_len;
 566         if (data_len) {
 567                 /* handle payload data, not required in first release */
 568                 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
 569         } else {
 570                 nopout_wqe->bd_list_addr_lo = (u32)
 571                                         bnx2i_conn->hba->mp_bd_dma;
 572                 nopout_wqe->bd_list_addr_hi =
 573                         (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 574                 nopout_wqe->num_bds = 1;
 575         }
 576         nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 577
 578         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 579         return 0;
 580 }
 581
 582
 583 /**
 584  * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
 585  * @conn:       iscsi connection
 586  * @cmd:        driver command structure which is requesting
 587  *              a WQE to sent to chip for further processing
 588  *
 589  * prepare and post logout request WQE to CNIC firmware
 590  */
 591 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
 592                             struct iscsi_task *task)
 593 {
 594         struct bnx2i_logout_request *logout_wqe;
 595         struct iscsi_logout *logout_hdr;
 596
 597         logout_hdr = (struct iscsi_logout *)task->hdr;
 598
 599         logout_wqe = (struct bnx2i_logout_request *)
 600                                                 bnx2i_conn->ep->qp.sq_prod_qe;
 601         memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
 602
 603         logout_wqe->op_code = logout_hdr->opcode;
 604         logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
 605         logout_wqe->op_attr =
 606                         logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
 607         logout_wqe->itt = ((u16)task->itt |
 608                            (ISCSI_TASK_TYPE_MPATH <<
 609                             ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
 610         logout_wqe->data_length = 0;
 611         logout_wqe->cid = 0;
 612
 613         logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
 614         logout_wqe->bd_list_addr_hi = (u32)
 615                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
 616         logout_wqe->num_bds = 1;
 617         logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
 618
 619         bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
 620
 621         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
 622         return 0;
 623 }
 624
 625
 626 /**
 627  * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
 628  * @conn:       iscsi connection which requires iscsi parameter update
 629  *
 630  * sends down iSCSI Conn Update request to move iSCSI conn to FFP
 631  */
 632 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
 633 {
 634         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
 635         struct bnx2i_hba *hba = bnx2i_conn->hba;
 636         struct kwqe *kwqe_arr[2];
 637         struct iscsi_kwqe_conn_update *update_wqe;
 638         struct iscsi_kwqe_conn_update conn_update_kwqe;
 639
 640         update_wqe = &conn_update_kwqe;
 641
 642         update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
 643         update_wqe->hdr.flags =
 644                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 645
 646         /* 5771x requires conn context id to be passed as is */
 647         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
 648                 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
 649         else
 650                 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
 651         update_wqe->conn_flags = 0;
 652         if (conn->hdrdgst_en)
 653                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
 654         if (conn->datadgst_en)
 655                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
 656         if (conn->session->initial_r2t_en)
 657                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
 658         if (conn->session->imm_data_en)
 659                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
 660
 661         update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
 662         update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
 663         update_wqe->first_burst_length = conn->session->first_burst;
 664         update_wqe->max_burst_length = conn->session->max_burst;
 665         update_wqe->exp_stat_sn = conn->exp_statsn;
 666         update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
 667         update_wqe->session_error_recovery_level = conn->session->erl;
 668         iscsi_conn_printk(KERN_ALERT, conn,
 669                           "bnx2i: conn update - MBL 0x%x FBL 0x%x"
 670                           "MRDSL_I 0x%x MRDSL_T 0x%x \n",
 671                           update_wqe->max_burst_length,
 672                           update_wqe->first_burst_length,
 673                           update_wqe->max_recv_pdu_length,
 674                           update_wqe->max_send_pdu_length);
 675
 676         kwqe_arr[0] = (struct kwqe *) update_wqe;
 677         if (hba->cnic && hba->cnic->submit_kwqes)
 678                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 679 }
 680
 681
 682 /**
 683  * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
 684  * @data:       endpoint (transport handle) structure pointer
 685  *
 686  * routine to handle connection offload/destroy request timeout
 687  */
 688 void bnx2i_ep_ofld_timer(struct timer_list *t)
 689 {
 690         struct bnx2i_endpoint *ep = from_timer(ep, t, ofld_timer);
 691
 692         if (ep->state == EP_STATE_OFLD_START) {
 693                 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
 694                 ep->state = EP_STATE_OFLD_FAILED;
 695         } else if (ep->state == EP_STATE_DISCONN_START) {
 696                 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
 697                 ep->state = EP_STATE_DISCONN_TIMEDOUT;
 698         } else if (ep->state == EP_STATE_CLEANUP_START) {
 699                 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
 700                 ep->state = EP_STATE_CLEANUP_FAILED;
 701         }
 702
 703         wake_up_interruptible(&ep->ofld_wait);
 704 }
 705
 706
 707 static int bnx2i_power_of2(u32 val)
 708 {
 709         u32 power = 0;
 710         if (val & (val - 1))
 711                 return power;
 712         val--;
 713         while (val) {
 714                 val = val >> 1;
 715                 power++;
 716         }
 717         return power;
 718 }
 719
 720
 721 /**
 722  * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
 723  * @hba:        adapter structure pointer
 724  * @cmd:        driver command structure which is requesting
 725  *              a WQE to sent to chip for further processing
 726  *
 727  * prepares and posts CONN_OFLD_REQ1/2 KWQE
 728  */
 729 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 730 {
 731         struct bnx2i_cleanup_request *cmd_cleanup;
 732
 733         cmd_cleanup =
 734                 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
 735         memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
 736
 737         cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
 738         cmd_cleanup->itt = cmd->req.itt;
 739         cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
 740
 741         bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
 742 }
 743
 744
 745 /**
 746  * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
 747  * @hba:        adapter structure pointer
 748  * @ep:         endpoint (transport identifier) structure
 749  *
 750  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
 751  *      iscsi connection context clean-up process
 752  */
 753 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 754 {
 755         struct kwqe *kwqe_arr[2];
 756         struct iscsi_kwqe_conn_destroy conn_cleanup;
 757         int rc = -EINVAL;
 758
 759         memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
 760
 761         conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
 762         conn_cleanup.hdr.flags =
 763                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 764         /* 5771x requires conn context id to be passed as is */
 765         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 766                 conn_cleanup.context_id = ep->ep_cid;
 767         else
 768                 conn_cleanup.context_id = (ep->ep_cid >> 7);
 769
 770         conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
 771
 772         kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
 773         if (hba->cnic && hba->cnic->submit_kwqes)
 774                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
 775
 776         return rc;
 777 }
 778
 779
 780 /**
 781  * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
 782  * @hba:                adapter structure pointer
 783  * @ep:                 endpoint (transport identifier) structure
 784  *
 785  * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 786  */
 787 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
 788                                          struct bnx2i_endpoint *ep)
 789 {
 790         struct kwqe *kwqe_arr[2];
 791         struct iscsi_kwqe_conn_offload1 ofld_req1;
 792         struct iscsi_kwqe_conn_offload2 ofld_req2;
 793         dma_addr_t dma_addr;
 794         int num_kwqes = 2;
 795         u32 *ptbl;
 796         int rc = -EINVAL;
 797
 798         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 799         ofld_req1.hdr.flags =
 800                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 801
 802         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 803
 804         dma_addr = ep->qp.sq_pgtbl_phys;
 805         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 806         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 807
 808         dma_addr = ep->qp.cq_pgtbl_phys;
 809         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 810         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 811
 812         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 813         ofld_req2.hdr.flags =
 814                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 815
 816         dma_addr = ep->qp.rq_pgtbl_phys;
 817         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 818         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 819
 820         ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 821
 822         ofld_req2.sq_first_pte.hi = *ptbl++;
 823         ofld_req2.sq_first_pte.lo = *ptbl;
 824
 825         ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
 826         ofld_req2.cq_first_pte.hi = *ptbl++;
 827         ofld_req2.cq_first_pte.lo = *ptbl;
 828
 829         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 830         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 831         ofld_req2.num_additional_wqes = 0;
 832
 833         if (hba->cnic && hba->cnic->submit_kwqes)
 834                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 835
 836         return rc;
 837 }
 838
 839
 840 /**
 841  * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
 842  * @hba:                adapter structure pointer
 843  * @ep:                 endpoint (transport identifier) structure
 844  *
 845  * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
 846  */
 847 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
 848                                           struct bnx2i_endpoint *ep)
 849 {
 850         struct kwqe *kwqe_arr[5];
 851         struct iscsi_kwqe_conn_offload1 ofld_req1;
 852         struct iscsi_kwqe_conn_offload2 ofld_req2;
 853         struct iscsi_kwqe_conn_offload3 ofld_req3[1];
 854         dma_addr_t dma_addr;
 855         int num_kwqes = 2;
 856         u32 *ptbl;
 857         int rc = -EINVAL;
 858
 859         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
 860         ofld_req1.hdr.flags =
 861                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 862
 863         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
 864
 865         dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
 866         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
 867         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 868
 869         dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
 870         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
 871         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 872
 873         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
 874         ofld_req2.hdr.flags =
 875                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
 876
 877         dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
 878         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
 879         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
 880
 881         ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 882         ofld_req2.sq_first_pte.hi = *ptbl++;
 883         ofld_req2.sq_first_pte.lo = *ptbl;
 884
 885         ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
 886         ofld_req2.cq_first_pte.hi = *ptbl++;
 887         ofld_req2.cq_first_pte.lo = *ptbl;
 888
 889         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
 890         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
 891
 892         ofld_req2.num_additional_wqes = 1;
 893         memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
 894         ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 895         ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
 896         ofld_req3[0].qp_first_pte[0].lo = *ptbl;
 897
 898         kwqe_arr[2] = (struct kwqe *) ofld_req3;
 899         /* need if we decide to go with multiple KCQE's per conn */
 900         num_kwqes += 1;
 901
 902         if (hba->cnic && hba->cnic->submit_kwqes)
 903                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
 904
 905         return rc;
 906 }
 907
 908 /**
 909  * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
 910  *
 911  * @hba:                adapter structure pointer
 912  * @ep:                 endpoint (transport identifier) structure
 913  *
 914  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
 915  */
 916 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
 917 {
 918         int rc;
 919
 920         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 921                 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
 922         else
 923                 rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
 924
 925         return rc;
 926 }
 927
 928
 929 /**
 930  * setup_qp_page_tables - iscsi QP page table setup function
 931  * @ep:         endpoint (transport identifier) structure
 932  *
 933  * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
 934  *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
 935  *      PT in little endian format
 936  */
 937 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
 938 {
 939         int num_pages;
 940         u32 *ptbl;
 941         dma_addr_t page;
 942         int cnic_dev_10g;
 943
 944         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
 945                 cnic_dev_10g = 1;
 946         else
 947                 cnic_dev_10g = 0;
 948
 949         /* SQ page table */
 950         memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
 951         num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE;
 952         page = ep->qp.sq_phys;
 953
 954         if (cnic_dev_10g)
 955                 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
 956         else
 957                 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
 958         while (num_pages--) {
 959                 if (cnic_dev_10g) {
 960                         /* PTE is written in little endian format for 57710 */
 961                         *ptbl = (u32) page;
 962                         ptbl++;
 963                         *ptbl = (u32) ((u64) page >> 32);
 964                         ptbl++;
 965                         page += CNIC_PAGE_SIZE;
 966                 } else {
 967                         /* PTE is written in big endian format for
 968                          * 5706/5708/5709 devices */
 969                         *ptbl = (u32) ((u64) page >> 32);
 970                         ptbl++;
 971                         *ptbl = (u32) page;
 972                         ptbl++;
 973                         page += CNIC_PAGE_SIZE;
 974                 }
 975         }
 976
 977         /* RQ page table */
 978         memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
 979         num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE;
 980         page = ep->qp.rq_phys;
 981
 982         if (cnic_dev_10g)
 983                 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
 984         else
 985                 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
 986         while (num_pages--) {
 987                 if (cnic_dev_10g) {
 988                         /* PTE is written in little endian format for 57710 */
 989                         *ptbl = (u32) page;
 990                         ptbl++;
 991                         *ptbl = (u32) ((u64) page >> 32);
 992                         ptbl++;
 993                         page += CNIC_PAGE_SIZE;
 994                 } else {
 995                         /* PTE is written in big endian format for
 996                          * 5706/5708/5709 devices */
 997                         *ptbl = (u32) ((u64) page >> 32);
 998                         ptbl++;
 999                         *ptbl = (u32) page;
1000                         ptbl++;
1001                         page += CNIC_PAGE_SIZE;
1002                 }
1003         }
1004
1005         /* CQ page table */
1006         memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
1007         num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE;
1008         page = ep->qp.cq_phys;
1009
1010         if (cnic_dev_10g)
1011                 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
1012         else
1013                 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
1014         while (num_pages--) {
1015                 if (cnic_dev_10g) {
1016                         /* PTE is written in little endian format for 57710 */
1017                         *ptbl = (u32) page;
1018                         ptbl++;
1019                         *ptbl = (u32) ((u64) page >> 32);
1020                         ptbl++;
1021                         page += CNIC_PAGE_SIZE;
1022                 } else {
1023                         /* PTE is written in big endian format for
1024                          * 5706/5708/5709 devices */
1025                         *ptbl = (u32) ((u64) page >> 32);
1026                         ptbl++;
1027                         *ptbl = (u32) page;
1028                         ptbl++;
1029                         page += CNIC_PAGE_SIZE;
1030                 }
1031         }
1032 }
1033
1034
1035 /**
1036  * bnx2i_alloc_qp_resc - allocates required resources for QP.
1037  * @hba:        adapter structure pointer
1038  * @ep:         endpoint (transport identifier) structure
1039  *
1040  * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1041  *      memory for SQ/RQ/CQ and page tables. EP structure elements such
1042  *      as producer/consumer indexes/pointers, queue sizes and page table
1043  *      contents are setup
1044  */
1045 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1046 {
1047         struct bnx2i_5771x_cq_db *cq_db;
1048
1049         ep->hba = hba;
1050         ep->conn = NULL;
1051         ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
1052
1053         /* Allocate page table memory for SQ which is page aligned */
1054         ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
1055         ep->qp.sq_mem_size =
1056                 (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1057         ep->qp.sq_pgtbl_size =
1058                 (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1059         ep->qp.sq_pgtbl_size =
1060                 (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1061
1062         ep->qp.sq_pgtbl_virt =
1063                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1064                                    &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
1065         if (!ep->qp.sq_pgtbl_virt) {
1066                 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1067                                   ep->qp.sq_pgtbl_size);
1068                 goto mem_alloc_err;
1069         }
1070
1071         /* Allocate memory area for actual SQ element */
1072         ep->qp.sq_virt =
1073                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1074                                    &ep->qp.sq_phys, GFP_KERNEL);
1075         if (!ep->qp.sq_virt) {
1076                 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1077                                   ep->qp.sq_mem_size);
1078                 goto mem_alloc_err;
1079         }
1080
1081         ep->qp.sq_first_qe = ep->qp.sq_virt;
1082         ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1083         ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1084         ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1085         ep->qp.sq_prod_idx = 0;
1086         ep->qp.sq_cons_idx = 0;
1087         ep->qp.sqe_left = hba->max_sqes;
1088
1089         /* Allocate page table memory for CQ which is page aligned */
1090         ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1091         ep->qp.cq_mem_size =
1092                 (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1093         ep->qp.cq_pgtbl_size =
1094                 (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1095         ep->qp.cq_pgtbl_size =
1096                 (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1097
1098         ep->qp.cq_pgtbl_virt =
1099                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1100                                    &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1101         if (!ep->qp.cq_pgtbl_virt) {
1102                 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1103                                   ep->qp.cq_pgtbl_size);
1104                 goto mem_alloc_err;
1105         }
1106
1107         /* Allocate memory area for actual CQ element */
1108         ep->qp.cq_virt =
1109                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1110                                    &ep->qp.cq_phys, GFP_KERNEL);
1111         if (!ep->qp.cq_virt) {
1112                 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1113                                   ep->qp.cq_mem_size);
1114                 goto mem_alloc_err;
1115         }
1116
1117         ep->qp.cq_first_qe = ep->qp.cq_virt;
1118         ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1119         ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1120         ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1121         ep->qp.cq_prod_idx = 0;
1122         ep->qp.cq_cons_idx = 0;
1123         ep->qp.cqe_left = hba->max_cqes;
1124         ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1125         ep->qp.cqe_size = hba->max_cqes;
1126
1127         /* Invalidate all EQ CQE index, req only for 57710 */
1128         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1129         memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1130
1131         /* Allocate page table memory for RQ which is page aligned */
1132         ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1133         ep->qp.rq_mem_size =
1134                 (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1135         ep->qp.rq_pgtbl_size =
1136                 (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1137         ep->qp.rq_pgtbl_size =
1138                 (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1139
1140         ep->qp.rq_pgtbl_virt =
1141                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1142                                    &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1143         if (!ep->qp.rq_pgtbl_virt) {
1144                 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1145                                   ep->qp.rq_pgtbl_size);
1146                 goto mem_alloc_err;
1147         }
1148
1149         /* Allocate memory area for actual RQ element */
1150         ep->qp.rq_virt =
1151                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1152                                    &ep->qp.rq_phys, GFP_KERNEL);
1153         if (!ep->qp.rq_virt) {
1154                 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1155                                   ep->qp.rq_mem_size);
1156                 goto mem_alloc_err;
1157         }
1158
1159         ep->qp.rq_first_qe = ep->qp.rq_virt;
1160         ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1161         ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1162         ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1163         ep->qp.rq_prod_idx = 0x8000;
1164         ep->qp.rq_cons_idx = 0;
1165         ep->qp.rqe_left = hba->max_rqes;
1166
1167         setup_qp_page_tables(ep);
1168
1169         return 0;
1170
1171 mem_alloc_err:
1172         bnx2i_free_qp_resc(hba, ep);
1173         return -ENOMEM;
1174 }
1175
1176
1177
1178 /**
1179  * bnx2i_free_qp_resc - free memory resources held by QP
1180  * @hba:        adapter structure pointer
1181  * @ep: endpoint (transport identifier) structure
1182  *
1183  * Free QP resources - SQ/RQ/CQ memory and page tables.
1184  */
1185 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1186 {
1187         if (ep->qp.ctx_base) {
1188                 iounmap(ep->qp.ctx_base);
1189                 ep->qp.ctx_base = NULL;
1190         }
1191         /* Free SQ mem */
1192         if (ep->qp.sq_pgtbl_virt) {
1193                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1194                                   ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1195                 ep->qp.sq_pgtbl_virt = NULL;
1196                 ep->qp.sq_pgtbl_phys = 0;
1197         }
1198         if (ep->qp.sq_virt) {
1199                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1200                                   ep->qp.sq_virt, ep->qp.sq_phys);
1201                 ep->qp.sq_virt = NULL;
1202                 ep->qp.sq_phys = 0;
1203         }
1204
1205         /* Free RQ mem */
1206         if (ep->qp.rq_pgtbl_virt) {
1207                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1208                                   ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1209                 ep->qp.rq_pgtbl_virt = NULL;
1210                 ep->qp.rq_pgtbl_phys = 0;
1211         }
1212         if (ep->qp.rq_virt) {
1213                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1214                                   ep->qp.rq_virt, ep->qp.rq_phys);
1215                 ep->qp.rq_virt = NULL;
1216                 ep->qp.rq_phys = 0;
1217         }
1218
1219         /* Free CQ mem */
1220         if (ep->qp.cq_pgtbl_virt) {
1221                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1222                                   ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1223                 ep->qp.cq_pgtbl_virt = NULL;
1224                 ep->qp.cq_pgtbl_phys = 0;
1225         }
1226         if (ep->qp.cq_virt) {
1227                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1228                                   ep->qp.cq_virt, ep->qp.cq_phys);
1229                 ep->qp.cq_virt = NULL;
1230                 ep->qp.cq_phys = 0;
1231         }
1232 }
1233
1234
1235 /**
1236  * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1237  * @hba:        adapter structure pointer
1238  *
1239  * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1240  *      This results in iSCSi support validation and on-chip context manager
1241  *      initialization.  Firmware completes this handshake with a CQE carrying
1242  *      the result of iscsi support validation. Parameter carried by
1243  *      iscsi init request determines the number of offloaded connection and
1244  *      tolerance level for iscsi protocol violation this hba/chip can support
1245  */
1246 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1247 {
1248         struct kwqe *kwqe_arr[3];
1249         struct iscsi_kwqe_init1 iscsi_init;
1250         struct iscsi_kwqe_init2 iscsi_init2;
1251         int rc = 0;
1252         u64 mask64;
1253
1254         memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1));
1255         memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2));
1256
1257         bnx2i_adjust_qp_size(hba);
1258
1259         iscsi_init.flags =
1260                 (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1261         if (en_tcp_dack)
1262                 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1263         iscsi_init.reserved0 = 0;
1264         iscsi_init.num_cqs = 1;
1265         iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1266         iscsi_init.hdr.flags =
1267                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1268
1269         iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1270         iscsi_init.dummy_buffer_addr_hi =
1271                 (u32) ((u64) hba->dummy_buf_dma >> 32);
1272
1273         hba->num_ccell = hba->max_sqes >> 1;
1274         hba->ctx_ccell_tasks =
1275                         ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1276         iscsi_init.num_ccells_per_conn = hba->num_ccell;
1277         iscsi_init.num_tasks_per_conn = hba->max_sqes;
1278         iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1279         iscsi_init.sq_num_wqes = hba->max_sqes;
1280         iscsi_init.cq_log_wqes_per_page =
1281                 (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE);
1282         iscsi_init.cq_num_wqes = hba->max_cqes;
1283         iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1284                                    (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1285         iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1286                                    (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1287         iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1288         iscsi_init.rq_num_wqes = hba->max_rqes;
1289
1290
1291         iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1292         iscsi_init2.hdr.flags =
1293                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1294         iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1295         mask64 = 0x0ULL;
1296         mask64 |= (
1297                 /* CISCO MDS */
1298                 (1UL <<
1299                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1300                 /* HP MSA1510i */
1301                 (1UL <<
1302                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1303                 /* EMC */
1304                 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1305         if (error_mask1) {
1306                 iscsi_init2.error_bit_map[0] = error_mask1;
1307                 mask64 ^= (u32)(mask64);
1308                 mask64 |= error_mask1;
1309         } else
1310                 iscsi_init2.error_bit_map[0] = (u32) mask64;
1311
1312         if (error_mask2) {
1313                 iscsi_init2.error_bit_map[1] = error_mask2;
1314                 mask64 &= 0xffffffff;
1315                 mask64 |= ((u64)error_mask2 << 32);
1316         } else
1317                 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1318
1319         iscsi_error_mask = mask64;
1320
1321         kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1322         kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1323
1324         if (hba->cnic && hba->cnic->submit_kwqes)
1325                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1326         return rc;
1327 }
1328
1329
1330 /**
1331  * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1332  * @session:    iscsi session
1333  * @bnx2i_conn: bnx2i connection
1334  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1335  *
1336  * process SCSI CMD Response CQE & complete the request to SCSI-ML
1337  */
1338 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1339                                 struct bnx2i_conn *bnx2i_conn,
1340                                 struct cqe *cqe)
1341 {
1342         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1343         struct bnx2i_hba *hba = bnx2i_conn->hba;
1344         struct bnx2i_cmd_response *resp_cqe;
1345         struct bnx2i_cmd *bnx2i_cmd;
1346         struct iscsi_task *task;
1347         struct iscsi_scsi_rsp *hdr;
1348         u32 datalen = 0;
1349
1350         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1351         spin_lock_bh(&session->back_lock);
1352         task = iscsi_itt_to_task(conn,
1353                                  resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1354         if (!task)
1355                 goto fail;
1356
1357         bnx2i_cmd = task->dd_data;
1358
1359         if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1360                 conn->datain_pdus_cnt +=
1361                         resp_cqe->task_stat.read_stat.num_data_ins;
1362                 conn->rxdata_octets +=
1363                         bnx2i_cmd->req.total_data_transfer_length;
1364                 ADD_STATS_64(hba, rx_pdus,
1365                              resp_cqe->task_stat.read_stat.num_data_ins);
1366                 ADD_STATS_64(hba, rx_bytes,
1367                              bnx2i_cmd->req.total_data_transfer_length);
1368         } else {
1369                 conn->dataout_pdus_cnt +=
1370                         resp_cqe->task_stat.write_stat.num_data_outs;
1371                 conn->r2t_pdus_cnt +=
1372                         resp_cqe->task_stat.write_stat.num_r2ts;
1373                 conn->txdata_octets +=
1374                         bnx2i_cmd->req.total_data_transfer_length;
1375                 ADD_STATS_64(hba, tx_pdus,
1376                              resp_cqe->task_stat.write_stat.num_data_outs);
1377                 ADD_STATS_64(hba, tx_bytes,
1378                              bnx2i_cmd->req.total_data_transfer_length);
1379                 ADD_STATS_64(hba, rx_pdus,
1380                              resp_cqe->task_stat.write_stat.num_r2ts);
1381         }
1382         bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1383
1384         hdr = (struct iscsi_scsi_rsp *)task->hdr;
1385         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1386         hdr->opcode = resp_cqe->op_code;
1387         hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1388         hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1389         hdr->response = resp_cqe->response;
1390         hdr->cmd_status = resp_cqe->status;
1391         hdr->flags = resp_cqe->response_flags;
1392         hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1393
1394         if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1395                 goto done;
1396
1397         if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1398                 datalen = resp_cqe->data_length;
1399                 if (datalen < 2)
1400                         goto done;
1401
1402                 if (datalen > BNX2I_RQ_WQE_SIZE) {
1403                         iscsi_conn_printk(KERN_ERR, conn,
1404                                           "sense data len %d > RQ sz\n",
1405                                           datalen);
1406                         datalen = BNX2I_RQ_WQE_SIZE;
1407                 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1408                         iscsi_conn_printk(KERN_ERR, conn,
1409                                           "sense data len %d > conn data\n",
1410                                           datalen);
1411                         datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1412                 }
1413
1414                 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1415                 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1416         }
1417
1418 done:
1419         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1420                              conn->data, datalen);
1421 fail:
1422         spin_unlock_bh(&session->back_lock);
1423         return 0;
1424 }
1425
1426
1427 /**
1428  * bnx2i_process_login_resp - this function handles iscsi login response
1429  * @session:            iscsi session pointer
1430  * @bnx2i_conn:         iscsi connection pointer
1431  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1432  *
1433  * process Login Response CQE & complete it to open-iscsi user daemon
1434  */
1435 static int bnx2i_process_login_resp(struct iscsi_session *session,
1436                                     struct bnx2i_conn *bnx2i_conn,
1437                                     struct cqe *cqe)
1438 {
1439         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1440         struct iscsi_task *task;
1441         struct bnx2i_login_response *login;
1442         struct iscsi_login_rsp *resp_hdr;
1443         int pld_len;
1444         int pad_len;
1445
1446         login = (struct bnx2i_login_response *) cqe;
1447         spin_lock(&session->back_lock);
1448         task = iscsi_itt_to_task(conn,
1449                                  login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1450         if (!task)
1451                 goto done;
1452
1453         resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1454         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1455         resp_hdr->opcode = login->op_code;
1456         resp_hdr->flags = login->response_flags;
1457         resp_hdr->max_version = login->version_max;
1458         resp_hdr->active_version = login->version_active;
1459         resp_hdr->hlength = 0;
1460
1461         hton24(resp_hdr->dlength, login->data_length);
1462         memcpy(resp_hdr->isid, &login->isid_lo, 6);
1463         resp_hdr->tsih = cpu_to_be16(login->tsih);
1464         resp_hdr->itt = task->hdr->itt;
1465         resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1466         resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1467         resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1468         resp_hdr->status_class = login->status_class;
1469         resp_hdr->status_detail = login->status_detail;
1470         pld_len = login->data_length;
1471         bnx2i_conn->gen_pdu.resp_wr_ptr =
1472                                         bnx2i_conn->gen_pdu.resp_buf + pld_len;
1473
1474         pad_len = 0;
1475         if (pld_len & 0x3)
1476                 pad_len = 4 - (pld_len % 4);
1477
1478         if (pad_len) {
1479                 int i = 0;
1480                 for (i = 0; i < pad_len; i++) {
1481                         bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1482                         bnx2i_conn->gen_pdu.resp_wr_ptr++;
1483                 }
1484         }
1485
1486         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1487                 bnx2i_conn->gen_pdu.resp_buf,
1488                 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1489 done:
1490         spin_unlock(&session->back_lock);
1491         return 0;
1492 }
1493
1494
1495 /**
1496  * bnx2i_process_text_resp - this function handles iscsi text response
1497  * @session:    iscsi session pointer
1498  * @bnx2i_conn: iscsi connection pointer
1499  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1500  *
1501  * process iSCSI Text Response CQE&  complete it to open-iscsi user daemon
1502  */
1503 static int bnx2i_process_text_resp(struct iscsi_session *session,
1504                                    struct bnx2i_conn *bnx2i_conn,
1505                                    struct cqe *cqe)
1506 {
1507         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1508         struct iscsi_task *task;
1509         struct bnx2i_text_response *text;
1510         struct iscsi_text_rsp *resp_hdr;
1511         int pld_len;
1512         int pad_len;
1513
1514         text = (struct bnx2i_text_response *) cqe;
1515         spin_lock(&session->back_lock);
1516         task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1517         if (!task)
1518                 goto done;
1519
1520         resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
1521         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1522         resp_hdr->opcode = text->op_code;
1523         resp_hdr->flags = text->response_flags;
1524         resp_hdr->hlength = 0;
1525
1526         hton24(resp_hdr->dlength, text->data_length);
1527         resp_hdr->itt = task->hdr->itt;
1528         resp_hdr->ttt = cpu_to_be32(text->ttt);
1529         resp_hdr->statsn = task->hdr->exp_statsn;
1530         resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
1531         resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
1532         pld_len = text->data_length;
1533         bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
1534                                           pld_len;
1535         pad_len = 0;
1536         if (pld_len & 0x3)
1537                 pad_len = 4 - (pld_len % 4);
1538
1539         if (pad_len) {
1540                 int i = 0;
1541                 for (i = 0; i < pad_len; i++) {
1542                         bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1543                         bnx2i_conn->gen_pdu.resp_wr_ptr++;
1544                 }
1545         }
1546         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1547                              bnx2i_conn->gen_pdu.resp_buf,
1548                              bnx2i_conn->gen_pdu.resp_wr_ptr -
1549                              bnx2i_conn->gen_pdu.resp_buf);
1550 done:
1551         spin_unlock(&session->back_lock);
1552         return 0;
1553 }
1554
1555
1556 /**
1557  * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1558  * @session:            iscsi session pointer
1559  * @bnx2i_conn:         iscsi connection pointer
1560  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1561  *
1562  * process iSCSI TMF Response CQE and wake up the driver eh thread.
1563  */
1564 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1565                                   struct bnx2i_conn *bnx2i_conn,
1566                                   struct cqe *cqe)
1567 {
1568         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1569         struct iscsi_task *task;
1570         struct bnx2i_tmf_response *tmf_cqe;
1571         struct iscsi_tm_rsp *resp_hdr;
1572
1573         tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1574         spin_lock(&session->back_lock);
1575         task = iscsi_itt_to_task(conn,
1576                                  tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1577         if (!task)
1578                 goto done;
1579
1580         resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1581         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1582         resp_hdr->opcode = tmf_cqe->op_code;
1583         resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1584         resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1585         resp_hdr->itt = task->hdr->itt;
1586         resp_hdr->response = tmf_cqe->response;
1587
1588         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1589 done:
1590         spin_unlock(&session->back_lock);
1591         return 0;
1592 }
1593
1594 /**
1595  * bnx2i_process_logout_resp - this function handles iscsi logout response
1596  * @session:            iscsi session pointer
1597  * @bnx2i_conn:         iscsi connection pointer
1598  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1599  *
1600  * process iSCSI Logout Response CQE & make function call to
1601  * notify the user daemon.
1602  */
1603 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1604                                      struct bnx2i_conn *bnx2i_conn,
1605                                      struct cqe *cqe)
1606 {
1607         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1608         struct iscsi_task *task;
1609         struct bnx2i_logout_response *logout;
1610         struct iscsi_logout_rsp *resp_hdr;
1611
1612         logout = (struct bnx2i_logout_response *) cqe;
1613         spin_lock(&session->back_lock);
1614         task = iscsi_itt_to_task(conn,
1615                                  logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1616         if (!task)
1617                 goto done;
1618
1619         resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1620         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1621         resp_hdr->opcode = logout->op_code;
1622         resp_hdr->flags = logout->response;
1623         resp_hdr->hlength = 0;
1624
1625         resp_hdr->itt = task->hdr->itt;
1626         resp_hdr->statsn = task->hdr->exp_statsn;
1627         resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1628         resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1629
1630         resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1631         resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1632
1633         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1634
1635         bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1636 done:
1637         spin_unlock(&session->back_lock);
1638         return 0;
1639 }
1640
1641 /**
1642  * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1643  * @session:            iscsi session pointer
1644  * @bnx2i_conn:         iscsi connection pointer
1645  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1646  *
1647  * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1648  */
1649 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1650                                            struct bnx2i_conn *bnx2i_conn,
1651                                            struct cqe *cqe)
1652 {
1653         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1654         struct bnx2i_nop_in_msg *nop_in;
1655         struct iscsi_task *task;
1656
1657         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1658         spin_lock(&session->back_lock);
1659         task = iscsi_itt_to_task(conn,
1660                                  nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1661         if (task)
1662                 __iscsi_put_task(task);
1663         spin_unlock(&session->back_lock);
1664 }
1665
1666 /**
1667  * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1668  * @conn:       iscsi connection
1669  *
1670  * Firmware advances RQ producer index for every unsolicited PDU even if
1671  *      payload data length is '0'. This function makes corresponding
1672  *      adjustments on the driver side to match this f/w behavior
1673  */
1674 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1675 {
1676         char dummy_rq_data[2];
1677         bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1678         bnx2i_put_rq_buf(bnx2i_conn, 1);
1679 }
1680
1681
1682 /**
1683  * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1684  * @session:            iscsi session pointer
1685  * @bnx2i_conn:         iscsi connection pointer
1686  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1687  *
1688  * process iSCSI target's proactive iSCSI NOPIN request
1689  */
1690 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1691                                      struct bnx2i_conn *bnx2i_conn,
1692                                      struct cqe *cqe)
1693 {
1694         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1695         struct iscsi_task *task;
1696         struct bnx2i_nop_in_msg *nop_in;
1697         struct iscsi_nopin *hdr;
1698         int tgt_async_nop = 0;
1699
1700         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1701
1702         spin_lock(&session->back_lock);
1703         hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1704         memset(hdr, 0, sizeof(struct iscsi_hdr));
1705         hdr->opcode = nop_in->op_code;
1706         hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1707         hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1708         hdr->ttt = cpu_to_be32(nop_in->ttt);
1709
1710         if (nop_in->itt == (u16) RESERVED_ITT) {
1711                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1712                 hdr->itt = RESERVED_ITT;
1713                 tgt_async_nop = 1;
1714                 goto done;
1715         }
1716
1717         /* this is a response to one of our nop-outs */
1718         task = iscsi_itt_to_task(conn,
1719                          (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
1720         if (task) {
1721                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1722                 hdr->itt = task->hdr->itt;
1723                 hdr->ttt = cpu_to_be32(nop_in->ttt);
1724                 memcpy(&hdr->lun, nop_in->lun, 8);
1725         }
1726 done:
1727         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1728         spin_unlock(&session->back_lock);
1729
1730         return tgt_async_nop;
1731 }
1732
1733
1734 /**
1735  * bnx2i_process_async_mesg - this function handles iscsi async message
1736  * @session:            iscsi session pointer
1737  * @bnx2i_conn:         iscsi connection pointer
1738  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1739  *
1740  * process iSCSI ASYNC Message
1741  */
1742 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1743                                      struct bnx2i_conn *bnx2i_conn,
1744                                      struct cqe *cqe)
1745 {
1746         struct bnx2i_async_msg *async_cqe;
1747         struct iscsi_async *resp_hdr;
1748         u8 async_event;
1749
1750         bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1751
1752         async_cqe = (struct bnx2i_async_msg *)cqe;
1753         async_event = async_cqe->async_event;
1754
1755         if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1756                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1757                                   "async: scsi events not supported\n");
1758                 return;
1759         }
1760
1761         spin_lock(&session->back_lock);
1762         resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1763         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1764         resp_hdr->opcode = async_cqe->op_code;
1765         resp_hdr->flags = 0x80;
1766
1767         memcpy(&resp_hdr->lun, async_cqe->lun, 8);
1768         resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1769         resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1770
1771         resp_hdr->async_event = async_cqe->async_event;
1772         resp_hdr->async_vcode = async_cqe->async_vcode;
1773
1774         resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1775         resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1776         resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1777
1778         __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1779                              (struct iscsi_hdr *)resp_hdr, NULL, 0);
1780         spin_unlock(&session->back_lock);
1781 }
1782
1783
1784 /**
1785  * bnx2i_process_reject_mesg - process iscsi reject pdu
1786  * @session:            iscsi session pointer
1787  * @bnx2i_conn:         iscsi connection pointer
1788  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1789  *
1790  * process iSCSI REJECT message
1791  */
1792 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1793                                       struct bnx2i_conn *bnx2i_conn,
1794                                       struct cqe *cqe)
1795 {
1796         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1797         struct bnx2i_reject_msg *reject;
1798         struct iscsi_reject *hdr;
1799
1800         reject = (struct bnx2i_reject_msg *) cqe;
1801         if (reject->data_length) {
1802                 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1803                 bnx2i_put_rq_buf(bnx2i_conn, 1);
1804         } else
1805                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1806
1807         spin_lock(&session->back_lock);
1808         hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1809         memset(hdr, 0, sizeof(struct iscsi_hdr));
1810         hdr->opcode = reject->op_code;
1811         hdr->reason = reject->reason;
1812         hton24(hdr->dlength, reject->data_length);
1813         hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1814         hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1815         hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1816         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1817                              reject->data_length);
1818         spin_unlock(&session->back_lock);
1819 }
1820
1821 /**
1822  * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1823  * @session:            iscsi session pointer
1824  * @bnx2i_conn:         iscsi connection pointer
1825  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1826  *
1827  * process command cleanup response CQE during conn shutdown or error recovery
1828  */
1829 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1830                                            struct bnx2i_conn *bnx2i_conn,
1831                                            struct cqe *cqe)
1832 {
1833         struct bnx2i_cleanup_response *cmd_clean_rsp;
1834         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1835         struct iscsi_task *task;
1836
1837         cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1838         spin_lock(&session->back_lock);
1839         task = iscsi_itt_to_task(conn,
1840                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1841         if (!task)
1842                 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1843                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1844         spin_unlock(&session->back_lock);
1845         complete(&bnx2i_conn->cmd_cleanup_cmpl);
1846 }
1847
1848
1849 /**
1850  * bnx2i_percpu_io_thread - thread per cpu for ios
1851  *
1852  * @arg:        ptr to bnx2i_percpu_info structure
1853  */
1854 int bnx2i_percpu_io_thread(void *arg)
1855 {
1856         struct bnx2i_percpu_s *p = arg;
1857         struct bnx2i_work *work, *tmp;
1858         LIST_HEAD(work_list);
1859
1860         set_user_nice(current, MIN_NICE);
1861
1862         while (!kthread_should_stop()) {
1863                 spin_lock_bh(&p->p_work_lock);
1864                 while (!list_empty(&p->work_list)) {
1865                         list_splice_init(&p->work_list, &work_list);
1866                         spin_unlock_bh(&p->p_work_lock);
1867
1868                         list_for_each_entry_safe(work, tmp, &work_list, list) {
1869                                 list_del_init(&work->list);
1870                                 /* work allocated in the bh, freed here */
1871                                 bnx2i_process_scsi_cmd_resp(work->session,
1872                                                             work->bnx2i_conn,
1873                                                             &work->cqe);
1874                                 atomic_dec(&work->bnx2i_conn->work_cnt);
1875                                 kfree(work);
1876                         }
1877                         spin_lock_bh(&p->p_work_lock);
1878                 }
1879                 set_current_state(TASK_INTERRUPTIBLE);
1880                 spin_unlock_bh(&p->p_work_lock);
1881                 schedule();
1882         }
1883         __set_current_state(TASK_RUNNING);
1884
1885         return 0;
1886 }
1887
1888
1889 /**
1890  * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
1891  * @bnx2i_conn:         bnx2i connection
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  * @hba:                adapter structure pointer
2473  * @update_kcqe:        kcqe pointer
2474  *
2475  * Generic KCQ event handler/dispatcher
2476  */
2477 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2478                                 u32 num_cqe)
2479 {
2480         struct bnx2i_hba *hba = context;
2481         int i = 0;
2482         struct iscsi_kcqe *ikcqe = NULL;
2483
2484         while (i < num_cqe) {
2485                 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2486
2487                 if (ikcqe->op_code ==
2488                     ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2489                         bnx2i_fastpath_notification(hba, ikcqe);
2490                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2491                         bnx2i_process_ofld_cmpl(hba, ikcqe);
2492                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2493                         bnx2i_process_update_conn_cmpl(hba, ikcqe);
2494                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2495                         if (ikcqe->completion_status !=
2496                             ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2497                                 bnx2i_iscsi_license_error(hba, ikcqe->\
2498                                                           completion_status);
2499                         else {
2500                                 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2501                                 bnx2i_get_link_state(hba);
2502                                 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2503                                                  "ISCSI_INIT passed\n",
2504                                                  (u8)hba->pcidev->bus->number,
2505                                                  hba->pci_devno,
2506                                                  (u8)hba->pci_func);
2507
2508
2509                         }
2510                 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2511                         bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2512                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2513                         bnx2i_process_iscsi_error(hba, ikcqe);
2514                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2515                         bnx2i_process_tcp_error(hba, ikcqe);
2516                 else
2517                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2518                                           ikcqe->op_code);
2519         }
2520 }
2521
2522
2523 /**
2524  * bnx2i_indicate_netevent - Generic netdev event handler
2525  * @context:    adapter structure pointer
2526  * @event:      event type
2527  * @vlan_id:    vlans id - associated vlan id with this event
2528  *
2529  * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2530  *      NETDEV_GOING_DOWN and NETDEV_CHANGE
2531  */
2532 static void bnx2i_indicate_netevent(void *context, unsigned long event,
2533                                     u16 vlan_id)
2534 {
2535         struct bnx2i_hba *hba = context;
2536
2537         /* Ignore all netevent coming from vlans */
2538         if (vlan_id != 0)
2539                 return;
2540
2541         switch (event) {
2542         case NETDEV_UP:
2543                 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2544                         bnx2i_send_fw_iscsi_init_msg(hba);
2545                 break;
2546         case NETDEV_DOWN:
2547                 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2548                 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2549                 break;
2550         case NETDEV_GOING_DOWN:
2551                 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2552                 iscsi_host_for_each_session(hba->shost,
2553                                             bnx2i_drop_session);
2554                 break;
2555         case NETDEV_CHANGE:
2556                 bnx2i_get_link_state(hba);
2557                 break;
2558         default:
2559                 ;
2560         }
2561 }
2562
2563
2564 /**
2565  * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2566  * @cm_sk:              cnic sock structure pointer
2567  *
2568  * function callback exported via bnx2i - cnic driver interface to
2569  *      indicate completion of option-2 TCP connect request.
2570  */
2571 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2572 {
2573         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2574
2575         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2576                 ep->state = EP_STATE_CONNECT_FAILED;
2577         else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2578                 ep->state = EP_STATE_CONNECT_COMPL;
2579         else
2580                 ep->state = EP_STATE_CONNECT_FAILED;
2581
2582         wake_up_interruptible(&ep->ofld_wait);
2583 }
2584
2585
2586 /**
2587  * bnx2i_cm_close_cmpl - process tcp conn close completion
2588  * @cm_sk:      cnic sock structure pointer
2589  *
2590  * function callback exported via bnx2i - cnic driver interface to
2591  *      indicate completion of option-2 graceful TCP connect shutdown
2592  */
2593 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2594 {
2595         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2596
2597         ep->state = EP_STATE_DISCONN_COMPL;
2598         wake_up_interruptible(&ep->ofld_wait);
2599 }
2600
2601
2602 /**
2603  * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2604  * @cm_sk:      cnic sock structure pointer
2605  *
2606  * function callback exported via bnx2i - cnic driver interface to
2607  *      indicate completion of option-2 abortive TCP connect termination
2608  */
2609 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2610 {
2611         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2612
2613         ep->state = EP_STATE_DISCONN_COMPL;
2614         wake_up_interruptible(&ep->ofld_wait);
2615 }
2616
2617
2618 /**
2619  * bnx2i_cm_remote_close - process received TCP FIN
2620  * @hba:                adapter structure pointer
2621  * @update_kcqe:        kcqe 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  * @hba:                adapter structure pointer
2638  * @update_kcqe:        kcqe pointer
2639  *
2640  * function callback exported via bnx2i - cnic driver interface to
2641  *      indicate async TCP events (RST) sent by the peer.
2642  */
2643 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2644 {
2645         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2646         u32 old_state = ep->state;
2647
2648         ep->state = EP_STATE_TCP_RST_RCVD;
2649         if (old_state == EP_STATE_DISCONN_START)
2650                 wake_up_interruptible(&ep->ofld_wait);
2651         else
2652                 if (ep->conn)
2653                         bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2654 }
2655
2656
2657 static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
2658                               char *buf, u16 buflen)
2659 {
2660         struct bnx2i_hba *hba = context;
2661         int rc;
2662
2663         if (!hba)
2664                 return -ENODEV;
2665
2666         rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2667                                 msg_type, buf, buflen);
2668         if (rc)
2669                 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2670
2671         return rc;
2672 }
2673
2674
2675 /**
2676  * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2677  *                      carrying callback function pointers
2678  *
2679  */
2680 struct cnic_ulp_ops bnx2i_cnic_cb = {
2681         .cnic_init = bnx2i_ulp_init,
2682         .cnic_exit = bnx2i_ulp_exit,
2683         .cnic_start = bnx2i_start,
2684         .cnic_stop = bnx2i_stop,
2685         .indicate_kcqes = bnx2i_indicate_kcqe,
2686         .indicate_netevent = bnx2i_indicate_netevent,
2687         .cm_connect_complete = bnx2i_cm_connect_cmpl,
2688         .cm_close_complete = bnx2i_cm_close_cmpl,
2689         .cm_abort_complete = bnx2i_cm_abort_cmpl,
2690         .cm_remote_close = bnx2i_cm_remote_close,
2691         .cm_remote_abort = bnx2i_cm_remote_abort,
2692         .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2693         .cnic_get_stats = bnx2i_get_stats,
2694         .owner = THIS_MODULE
2695 };
2696
2697
2698 /**
2699  * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2700  * @ep: bnx2i endpoint
2701  *
2702  * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2703  *      register in BAR #0. Whereas in 57710 these register are accessed by
2704  *      mapping BAR #1
2705  */
2706 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2707 {
2708         u32 cid_num;
2709         u32 reg_off;
2710         u32 first_l4l5;
2711         u32 ctx_sz;
2712         u32 config2;
2713         resource_size_t reg_base;
2714
2715         cid_num = bnx2i_get_cid_num(ep);
2716
2717         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2718                 reg_base = pci_resource_start(ep->hba->pcidev,
2719                                               BNX2X_DOORBELL_PCI_BAR);
2720                 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
2721                 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2722                 if (!ep->qp.ctx_base)
2723                         return -ENOMEM;
2724                 goto arm_cq;
2725         }
2726
2727         if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2728             (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2729                 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2730                 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2731                 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2732                 if (ctx_sz)
2733                         reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2734                                   + BNX2I_570X_PAGE_SIZE_DEFAULT *
2735                                   (((cid_num - first_l4l5) / ctx_sz) + 256);
2736                 else
2737                         reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2738         } else
2739                 /* 5709 device in normal node and 5706/5708 devices */
2740                 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2741
2742         ep->qp.ctx_base = ioremap_nocache(ep->hba->reg_base + reg_off,
2743                                           MB_KERNEL_CTX_SIZE);
2744         if (!ep->qp.ctx_base)
2745                 return -ENOMEM;
2746
2747 arm_cq:
2748         bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2749         return 0;
2750 }