drivers/infiniband/hw/bnxt_re/qplib

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This source file includes following definitions.
__wait_for_resp
__block_for_resp
__send_message
bnxt_qplib_rcfw_send_message
bnxt_qplib_process_func_event
bnxt_qplib_process_qp_event
bnxt_qplib_service_creq
bnxt_qplib_creq_irq
bnxt_qplib_deinit_rcfw
__get_pbl_pg_idx
bnxt_qplib_init_rcfw
bnxt_qplib_free_rcfw_channel
bnxt_qplib_alloc_rcfw_channel
bnxt_qplib_rcfw_stop_irq
bnxt_qplib_disable_rcfw_channel
bnxt_qplib_rcfw_start_irq
bnxt_qplib_enable_rcfw_channel
bnxt_qplib_rcfw_alloc_sbuf
bnxt_qplib_rcfw_free_sbuf
   1 /*
   2  * Broadcom NetXtreme-E RoCE driver.
   3  *
   4  * Copyright (c) 2016 - 2017, Broadcom. All rights reserved.  The term
   5  * Broadcom refers to Broadcom Limited and/or its subsidiaries.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * BSD license below:
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in
  21  *    the documentation and/or other materials provided with the
  22  *    distribution.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
  25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  26  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  27  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
  28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  31  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  32  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  33  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  34  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  * Description: RDMA Controller HW interface
  37  */
  38 
  39 #define dev_fmt(fmt) "QPLIB: " fmt
  40 
  41 #include <linux/interrupt.h>
  42 #include <linux/spinlock.h>
  43 #include <linux/pci.h>
  44 #include <linux/prefetch.h>
  45 #include <linux/delay.h>
  46 
  47 #include "roce_hsi.h"
  48 #include "qplib_res.h"
  49 #include "qplib_rcfw.h"
  50 #include "qplib_sp.h"
  51 #include "qplib_fp.h"
  52 
  53 static void bnxt_qplib_service_creq(unsigned long data);
  54 
  55 /* Hardware communication channel */
  56 static int __wait_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie)
  57 {
  58         u16 cbit;
  59         int rc;
  60 
  61         cbit = cookie % rcfw->cmdq_depth;
  62         rc = wait_event_timeout(rcfw->waitq,
  63                                 !test_bit(cbit, rcfw->cmdq_bitmap),
  64                                 msecs_to_jiffies(RCFW_CMD_WAIT_TIME_MS));
  65         return rc ? 0 : -ETIMEDOUT;
  66 };
  67 
  68 static int __block_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie)
  69 {
  70         u32 count = RCFW_BLOCKED_CMD_WAIT_COUNT;
  71         u16 cbit;
  72 
  73         cbit = cookie % rcfw->cmdq_depth;
  74         if (!test_bit(cbit, rcfw->cmdq_bitmap))
  75                 goto done;
  76         do {
  77                 mdelay(1); /* 1m sec */
  78                 bnxt_qplib_service_creq((unsigned long)rcfw);
  79         } while (test_bit(cbit, rcfw->cmdq_bitmap) && --count);
  80 done:
  81         return count ? 0 : -ETIMEDOUT;
  82 };
  83 
  84 static int __send_message(struct bnxt_qplib_rcfw *rcfw, struct cmdq_base *req,
  85                           struct creq_base *resp, void *sb, u8 is_block)
  86 {
  87         struct bnxt_qplib_cmdqe *cmdqe, **cmdq_ptr;
  88         struct bnxt_qplib_hwq *cmdq = &rcfw->cmdq;
  89         u32 cmdq_depth = rcfw->cmdq_depth;
  90         struct bnxt_qplib_crsq *crsqe;
  91         u32 sw_prod, cmdq_prod;
  92         unsigned long flags;
  93         u32 size, opcode;
  94         u16 cookie, cbit;
  95         u8 *preq;
  96 
  97         opcode = req->opcode;
  98         if (!test_bit(FIRMWARE_INITIALIZED_FLAG, &rcfw->flags) &&
  99             (opcode != CMDQ_BASE_OPCODE_QUERY_FUNC &&
 100              opcode != CMDQ_BASE_OPCODE_INITIALIZE_FW &&
 101              opcode != CMDQ_BASE_OPCODE_QUERY_VERSION)) {
 102                 dev_err(&rcfw->pdev->dev,
 103                         "RCFW not initialized, reject opcode 0x%x\n", opcode);
 104                 return -EINVAL;
 105         }
 106 
 107         if (test_bit(FIRMWARE_INITIALIZED_FLAG, &rcfw->flags) &&
 108             opcode == CMDQ_BASE_OPCODE_INITIALIZE_FW) {
 109                 dev_err(&rcfw->pdev->dev, "RCFW already initialized!\n");
 110                 return -EINVAL;
 111         }
 112 
 113         if (test_bit(FIRMWARE_TIMED_OUT, &rcfw->flags))
 114                 return -ETIMEDOUT;
 115 
 116         /* Cmdq are in 16-byte units, each request can consume 1 or more
 117          * cmdqe
 118          */
 119         spin_lock_irqsave(&cmdq->lock, flags);
 120         if (req->cmd_size >= HWQ_FREE_SLOTS(cmdq)) {
 121                 dev_err(&rcfw->pdev->dev, "RCFW: CMDQ is full!\n");
 122                 spin_unlock_irqrestore(&cmdq->lock, flags);
 123                 return -EAGAIN;
 124         }
 125 
 126 
 127         cookie = rcfw->seq_num & RCFW_MAX_COOKIE_VALUE;
 128         cbit = cookie % rcfw->cmdq_depth;
 129         if (is_block)
 130                 cookie |= RCFW_CMD_IS_BLOCKING;
 131 
 132         set_bit(cbit, rcfw->cmdq_bitmap);
 133         req->cookie = cpu_to_le16(cookie);
 134         crsqe = &rcfw->crsqe_tbl[cbit];
 135         if (crsqe->resp) {
 136                 spin_unlock_irqrestore(&cmdq->lock, flags);
 137                 return -EBUSY;
 138         }
 139 
 140         size = req->cmd_size;
 141         /* change the cmd_size to the number of 16byte cmdq unit.
 142          * req->cmd_size is modified here
 143          */
 144         bnxt_qplib_set_cmd_slots(req);
 145 
 146         memset(resp, 0, sizeof(*resp));
 147         crsqe->resp = (struct creq_qp_event *)resp;
 148         crsqe->resp->cookie = req->cookie;
 149         crsqe->req_size = req->cmd_size;
 150         if (req->resp_size && sb) {
 151                 struct bnxt_qplib_rcfw_sbuf *sbuf = sb;
 152 
 153                 req->resp_addr = cpu_to_le64(sbuf->dma_addr);
 154                 req->resp_size = (sbuf->size + BNXT_QPLIB_CMDQE_UNITS - 1) /
 155                                   BNXT_QPLIB_CMDQE_UNITS;
 156         }
 157 
 158         cmdq_ptr = (struct bnxt_qplib_cmdqe **)cmdq->pbl_ptr;
 159         preq = (u8 *)req;
 160         do {
 161                 /* Locate the next cmdq slot */
 162                 sw_prod = HWQ_CMP(cmdq->prod, cmdq);
 163                 cmdqe = &cmdq_ptr[get_cmdq_pg(sw_prod, cmdq_depth)]
 164                                 [get_cmdq_idx(sw_prod, cmdq_depth)];
 165                 if (!cmdqe) {
 166                         dev_err(&rcfw->pdev->dev,
 167                                 "RCFW request failed with no cmdqe!\n");
 168                         goto done;
 169                 }
 170                 /* Copy a segment of the req cmd to the cmdq */
 171                 memset(cmdqe, 0, sizeof(*cmdqe));
 172                 memcpy(cmdqe, preq, min_t(u32, size, sizeof(*cmdqe)));
 173                 preq += min_t(u32, size, sizeof(*cmdqe));
 174                 size -= min_t(u32, size, sizeof(*cmdqe));
 175                 cmdq->prod++;
 176                 rcfw->seq_num++;
 177         } while (size > 0);
 178 
 179         rcfw->seq_num++;
 180 
 181         cmdq_prod = cmdq->prod;
 182         if (test_bit(FIRMWARE_FIRST_FLAG, &rcfw->flags)) {
 183                 /* The very first doorbell write
 184                  * is required to set this flag
 185                  * which prompts the FW to reset
 186                  * its internal pointers
 187                  */
 188                 cmdq_prod |= BIT(FIRMWARE_FIRST_FLAG);
 189                 clear_bit(FIRMWARE_FIRST_FLAG, &rcfw->flags);
 190         }
 191 
 192         /* ring CMDQ DB */
 193         wmb();
 194         writel(cmdq_prod, rcfw->cmdq_bar_reg_iomem +
 195                rcfw->cmdq_bar_reg_prod_off);
 196         writel(RCFW_CMDQ_TRIG_VAL, rcfw->cmdq_bar_reg_iomem +
 197                rcfw->cmdq_bar_reg_trig_off);
 198 done:
 199         spin_unlock_irqrestore(&cmdq->lock, flags);
 200         /* Return the CREQ response pointer */
 201         return 0;
 202 }
 203 
 204 int bnxt_qplib_rcfw_send_message(struct bnxt_qplib_rcfw *rcfw,
 205                                  struct cmdq_base *req,
 206                                  struct creq_base *resp,
 207                                  void *sb, u8 is_block)
 208 {
 209         struct creq_qp_event *evnt = (struct creq_qp_event *)resp;
 210         u16 cookie;
 211         u8 opcode, retry_cnt = 0xFF;
 212         int rc = 0;
 213 
 214         do {
 215                 opcode = req->opcode;
 216                 rc = __send_message(rcfw, req, resp, sb, is_block);
 217                 cookie = le16_to_cpu(req->cookie) & RCFW_MAX_COOKIE_VALUE;
 218                 if (!rc)
 219                         break;
 220 
 221                 if (!retry_cnt || (rc != -EAGAIN && rc != -EBUSY)) {
 222                         /* send failed */
 223                         dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x send failed\n",
 224                                 cookie, opcode);
 225                         return rc;
 226                 }
 227                 is_block ? mdelay(1) : usleep_range(500, 1000);
 228 
 229         } while (retry_cnt--);
 230 
 231         if (is_block)
 232                 rc = __block_for_resp(rcfw, cookie);
 233         else
 234                 rc = __wait_for_resp(rcfw, cookie);
 235         if (rc) {
 236                 /* timed out */
 237                 dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x timedout (%d)msec\n",
 238                         cookie, opcode, RCFW_CMD_WAIT_TIME_MS);
 239                 set_bit(FIRMWARE_TIMED_OUT, &rcfw->flags);
 240                 return rc;
 241         }
 242 
 243         if (evnt->status) {
 244                 /* failed with status */
 245                 dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x status %#x\n",
 246                         cookie, opcode, evnt->status);
 247                 rc = -EFAULT;
 248         }
 249 
 250         return rc;
 251 }
 252 /* Completions */
 253 static int bnxt_qplib_process_func_event(struct bnxt_qplib_rcfw *rcfw,
 254                                          struct creq_func_event *func_event)
 255 {
 256         switch (func_event->event) {
 257         case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
 258                 break;
 259         case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
 260                 break;
 261         case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
 262                 break;
 263         case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
 264                 break;
 265         case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
 266                 break;
 267         case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
 268                 break;
 269         case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
 270                 break;
 271         case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
 272                 /* SRQ ctx error, call srq_handler??
 273                  * But there's no SRQ handle!
 274                  */
 275                 break;
 276         case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
 277                 break;
 278         case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
 279                 break;
 280         case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
 281                 break;
 282         case CREQ_FUNC_EVENT_EVENT_VF_COMM_REQUEST:
 283                 break;
 284         case CREQ_FUNC_EVENT_EVENT_RESOURCE_EXHAUSTED:
 285                 break;
 286         default:
 287                 return -EINVAL;
 288         }
 289         return 0;
 290 }
 291 
 292 static int bnxt_qplib_process_qp_event(struct bnxt_qplib_rcfw *rcfw,
 293                                        struct creq_qp_event *qp_event)
 294 {
 295         struct bnxt_qplib_hwq *cmdq = &rcfw->cmdq;
 296         struct creq_qp_error_notification *err_event;
 297         struct bnxt_qplib_crsq *crsqe;
 298         unsigned long flags;
 299         struct bnxt_qplib_qp *qp;
 300         u16 cbit, blocked = 0;
 301         u16 cookie;
 302         __le16  mcookie;
 303         u32 qp_id;
 304 
 305         switch (qp_event->event) {
 306         case CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION:
 307                 err_event = (struct creq_qp_error_notification *)qp_event;
 308                 qp_id = le32_to_cpu(err_event->xid);
 309                 qp = rcfw->qp_tbl[qp_id].qp_handle;
 310                 dev_dbg(&rcfw->pdev->dev,
 311                         "Received QP error notification\n");
 312                 dev_dbg(&rcfw->pdev->dev,
 313                         "qpid 0x%x, req_err=0x%x, resp_err=0x%x\n",
 314                         qp_id, err_event->req_err_state_reason,
 315                         err_event->res_err_state_reason);
 316                 if (!qp)
 317                         break;
 318                 bnxt_qplib_mark_qp_error(qp);
 319                 rcfw->aeq_handler(rcfw, qp_event, qp);
 320                 break;
 321         default:
 322                 /*
 323                  * Command Response
 324                  * cmdq->lock needs to be acquired to synchronie
 325                  * the command send and completion reaping. This function
 326                  * is always called with creq->lock held. Using
 327                  * the nested variant of spin_lock.
 328                  *
 329                  */
 330 
 331                 spin_lock_irqsave_nested(&cmdq->lock, flags,
 332                                          SINGLE_DEPTH_NESTING);
 333                 cookie = le16_to_cpu(qp_event->cookie);
 334                 mcookie = qp_event->cookie;
 335                 blocked = cookie & RCFW_CMD_IS_BLOCKING;
 336                 cookie &= RCFW_MAX_COOKIE_VALUE;
 337                 cbit = cookie % rcfw->cmdq_depth;
 338                 crsqe = &rcfw->crsqe_tbl[cbit];
 339                 if (crsqe->resp &&
 340                     crsqe->resp->cookie  == mcookie) {
 341                         memcpy(crsqe->resp, qp_event, sizeof(*qp_event));
 342                         crsqe->resp = NULL;
 343                 } else {
 344                         if (crsqe->resp && crsqe->resp->cookie)
 345                                 dev_err(&rcfw->pdev->dev,
 346                                         "CMD %s cookie sent=%#x, recd=%#x\n",
 347                                         crsqe->resp ? "mismatch" : "collision",
 348                                         crsqe->resp ? crsqe->resp->cookie : 0,
 349                                         mcookie);
 350                 }
 351                 if (!test_and_clear_bit(cbit, rcfw->cmdq_bitmap))
 352                         dev_warn(&rcfw->pdev->dev,
 353                                  "CMD bit %d was not requested\n", cbit);
 354                 cmdq->cons += crsqe->req_size;
 355                 crsqe->req_size = 0;
 356 
 357                 if (!blocked)
 358                         wake_up(&rcfw->waitq);
 359                 spin_unlock_irqrestore(&cmdq->lock, flags);
 360         }
 361         return 0;
 362 }
 363 
 364 /* SP - CREQ Completion handlers */
 365 static void bnxt_qplib_service_creq(unsigned long data)
 366 {
 367         struct bnxt_qplib_rcfw *rcfw = (struct bnxt_qplib_rcfw *)data;
 368         bool gen_p5 = bnxt_qplib_is_chip_gen_p5(rcfw->res->cctx);
 369         struct bnxt_qplib_hwq *creq = &rcfw->creq;
 370         u32 type, budget = CREQ_ENTRY_POLL_BUDGET;
 371         struct creq_base *creqe, **creq_ptr;
 372         u32 sw_cons, raw_cons;
 373         unsigned long flags;
 374 
 375         /* Service the CREQ until budget is over */
 376         spin_lock_irqsave(&creq->lock, flags);
 377         raw_cons = creq->cons;
 378         while (budget > 0) {
 379                 sw_cons = HWQ_CMP(raw_cons, creq);
 380                 creq_ptr = (struct creq_base **)creq->pbl_ptr;
 381                 creqe = &creq_ptr[get_creq_pg(sw_cons)][get_creq_idx(sw_cons)];
 382                 if (!CREQ_CMP_VALID(creqe, raw_cons, creq->max_elements))
 383                         break;
 384                 /* The valid test of the entry must be done first before
 385                  * reading any further.
 386                  */
 387                 dma_rmb();
 388 
 389                 type = creqe->type & CREQ_BASE_TYPE_MASK;
 390                 switch (type) {
 391                 case CREQ_BASE_TYPE_QP_EVENT:
 392                         bnxt_qplib_process_qp_event
 393                                 (rcfw, (struct creq_qp_event *)creqe);
 394                         rcfw->creq_qp_event_processed++;
 395                         break;
 396                 case CREQ_BASE_TYPE_FUNC_EVENT:
 397                         if (!bnxt_qplib_process_func_event
 398                             (rcfw, (struct creq_func_event *)creqe))
 399                                 rcfw->creq_func_event_processed++;
 400                         else
 401                                 dev_warn(&rcfw->pdev->dev,
 402                                          "aeqe:%#x Not handled\n", type);
 403                         break;
 404                 default:
 405                         if (type != ASYNC_EVENT_CMPL_TYPE_HWRM_ASYNC_EVENT)
 406                                 dev_warn(&rcfw->pdev->dev,
 407                                          "creqe with event 0x%x not handled\n",
 408                                          type);
 409                         break;
 410                 }
 411                 raw_cons++;
 412                 budget--;
 413         }
 414 
 415         if (creq->cons != raw_cons) {
 416                 creq->cons = raw_cons;
 417                 bnxt_qplib_ring_creq_db_rearm(rcfw->creq_bar_reg_iomem,
 418                                               raw_cons, creq->max_elements,
 419                                               rcfw->creq_ring_id, gen_p5);
 420         }
 421         spin_unlock_irqrestore(&creq->lock, flags);
 422 }
 423 
 424 static irqreturn_t bnxt_qplib_creq_irq(int irq, void *dev_instance)
 425 {
 426         struct bnxt_qplib_rcfw *rcfw = dev_instance;
 427         struct bnxt_qplib_hwq *creq = &rcfw->creq;
 428         struct creq_base **creq_ptr;
 429         u32 sw_cons;
 430 
 431         /* Prefetch the CREQ element */
 432         sw_cons = HWQ_CMP(creq->cons, creq);
 433         creq_ptr = (struct creq_base **)rcfw->creq.pbl_ptr;
 434         prefetch(&creq_ptr[get_creq_pg(sw_cons)][get_creq_idx(sw_cons)]);
 435 
 436         tasklet_schedule(&rcfw->worker);
 437 
 438         return IRQ_HANDLED;
 439 }
 440 
 441 /* RCFW */
 442 int bnxt_qplib_deinit_rcfw(struct bnxt_qplib_rcfw *rcfw)
 443 {
 444         struct cmdq_deinitialize_fw req;
 445         struct creq_deinitialize_fw_resp resp;
 446         u16 cmd_flags = 0;
 447         int rc;
 448 
 449         RCFW_CMD_PREP(req, DEINITIALIZE_FW, cmd_flags);
 450         rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req, (void *)&resp,
 451                                           NULL, 0);
 452         if (rc)
 453                 return rc;
 454 
 455         clear_bit(FIRMWARE_INITIALIZED_FLAG, &rcfw->flags);
 456         return 0;
 457 }
 458 
 459 static int __get_pbl_pg_idx(struct bnxt_qplib_pbl *pbl)
 460 {
 461         return (pbl->pg_size == ROCE_PG_SIZE_4K ?
 462                                       CMDQ_INITIALIZE_FW_QPC_PG_SIZE_PG_4K :
 463                 pbl->pg_size == ROCE_PG_SIZE_8K ?
 464                                       CMDQ_INITIALIZE_FW_QPC_PG_SIZE_PG_8K :
 465                 pbl->pg_size == ROCE_PG_SIZE_64K ?
 466                                       CMDQ_INITIALIZE_FW_QPC_PG_SIZE_PG_64K :
 467                 pbl->pg_size == ROCE_PG_SIZE_2M ?
 468                                       CMDQ_INITIALIZE_FW_QPC_PG_SIZE_PG_2M :
 469                 pbl->pg_size == ROCE_PG_SIZE_8M ?
 470                                       CMDQ_INITIALIZE_FW_QPC_PG_SIZE_PG_8M :
 471                 pbl->pg_size == ROCE_PG_SIZE_1G ?
 472                                       CMDQ_INITIALIZE_FW_QPC_PG_SIZE_PG_1G :
 473                                       CMDQ_INITIALIZE_FW_QPC_PG_SIZE_PG_4K);
 474 }
 475 
 476 int bnxt_qplib_init_rcfw(struct bnxt_qplib_rcfw *rcfw,
 477                          struct bnxt_qplib_ctx *ctx, int is_virtfn)
 478 {
 479         struct cmdq_initialize_fw req;
 480         struct creq_initialize_fw_resp resp;
 481         u16 cmd_flags = 0, level;
 482         int rc;
 483 
 484         RCFW_CMD_PREP(req, INITIALIZE_FW, cmd_flags);
 485         /* Supply (log-base-2-of-host-page-size - base-page-shift)
 486          * to bono to adjust the doorbell page sizes.
 487          */
 488         req.log2_dbr_pg_size = cpu_to_le16(PAGE_SHIFT -
 489                                            RCFW_DBR_BASE_PAGE_SHIFT);
 490         /*
 491          * Gen P5 devices doesn't require this allocation
 492          * as the L2 driver does the same for RoCE also.
 493          * Also, VFs need not setup the HW context area, PF
 494          * shall setup this area for VF. Skipping the
 495          * HW programming
 496          */
 497         if (is_virtfn || bnxt_qplib_is_chip_gen_p5(rcfw->res->cctx))
 498                 goto skip_ctx_setup;
 499 
 500         level = ctx->qpc_tbl.level;
 501         req.qpc_pg_size_qpc_lvl = (level << CMDQ_INITIALIZE_FW_QPC_LVL_SFT) |
 502                                 __get_pbl_pg_idx(&ctx->qpc_tbl.pbl[level]);
 503         level = ctx->mrw_tbl.level;
 504         req.mrw_pg_size_mrw_lvl = (level << CMDQ_INITIALIZE_FW_MRW_LVL_SFT) |
 505                                 __get_pbl_pg_idx(&ctx->mrw_tbl.pbl[level]);
 506         level = ctx->srqc_tbl.level;
 507         req.srq_pg_size_srq_lvl = (level << CMDQ_INITIALIZE_FW_SRQ_LVL_SFT) |
 508                                 __get_pbl_pg_idx(&ctx->srqc_tbl.pbl[level]);
 509         level = ctx->cq_tbl.level;
 510         req.cq_pg_size_cq_lvl = (level << CMDQ_INITIALIZE_FW_CQ_LVL_SFT) |
 511                                 __get_pbl_pg_idx(&ctx->cq_tbl.pbl[level]);
 512         level = ctx->srqc_tbl.level;
 513         req.srq_pg_size_srq_lvl = (level << CMDQ_INITIALIZE_FW_SRQ_LVL_SFT) |
 514                                 __get_pbl_pg_idx(&ctx->srqc_tbl.pbl[level]);
 515         level = ctx->cq_tbl.level;
 516         req.cq_pg_size_cq_lvl = (level << CMDQ_INITIALIZE_FW_CQ_LVL_SFT) |
 517                                 __get_pbl_pg_idx(&ctx->cq_tbl.pbl[level]);
 518         level = ctx->tim_tbl.level;
 519         req.tim_pg_size_tim_lvl = (level << CMDQ_INITIALIZE_FW_TIM_LVL_SFT) |
 520                                   __get_pbl_pg_idx(&ctx->tim_tbl.pbl[level]);
 521         level = ctx->tqm_pde_level;
 522         req.tqm_pg_size_tqm_lvl = (level << CMDQ_INITIALIZE_FW_TQM_LVL_SFT) |
 523                                   __get_pbl_pg_idx(&ctx->tqm_pde.pbl[level]);
 524 
 525         req.qpc_page_dir =
 526                 cpu_to_le64(ctx->qpc_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
 527         req.mrw_page_dir =
 528                 cpu_to_le64(ctx->mrw_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
 529         req.srq_page_dir =
 530                 cpu_to_le64(ctx->srqc_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
 531         req.cq_page_dir =
 532                 cpu_to_le64(ctx->cq_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
 533         req.tim_page_dir =
 534                 cpu_to_le64(ctx->tim_tbl.pbl[PBL_LVL_0].pg_map_arr[0]);
 535         req.tqm_page_dir =
 536                 cpu_to_le64(ctx->tqm_pde.pbl[PBL_LVL_0].pg_map_arr[0]);
 537 
 538         req.number_of_qp = cpu_to_le32(ctx->qpc_tbl.max_elements);
 539         req.number_of_mrw = cpu_to_le32(ctx->mrw_tbl.max_elements);
 540         req.number_of_srq = cpu_to_le32(ctx->srqc_tbl.max_elements);
 541         req.number_of_cq = cpu_to_le32(ctx->cq_tbl.max_elements);
 542 
 543         req.max_qp_per_vf = cpu_to_le32(ctx->vf_res.max_qp_per_vf);
 544         req.max_mrw_per_vf = cpu_to_le32(ctx->vf_res.max_mrw_per_vf);
 545         req.max_srq_per_vf = cpu_to_le32(ctx->vf_res.max_srq_per_vf);
 546         req.max_cq_per_vf = cpu_to_le32(ctx->vf_res.max_cq_per_vf);
 547         req.max_gid_per_vf = cpu_to_le32(ctx->vf_res.max_gid_per_vf);
 548 
 549 skip_ctx_setup:
 550         req.stat_ctx_id = cpu_to_le32(ctx->stats.fw_id);
 551         rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req, (void *)&resp,
 552                                           NULL, 0);
 553         if (rc)
 554                 return rc;
 555         set_bit(FIRMWARE_INITIALIZED_FLAG, &rcfw->flags);
 556         return 0;
 557 }
 558 
 559 void bnxt_qplib_free_rcfw_channel(struct bnxt_qplib_rcfw *rcfw)
 560 {
 561         kfree(rcfw->qp_tbl);
 562         kfree(rcfw->crsqe_tbl);
 563         bnxt_qplib_free_hwq(rcfw->pdev, &rcfw->cmdq);
 564         bnxt_qplib_free_hwq(rcfw->pdev, &rcfw->creq);
 565         rcfw->pdev = NULL;
 566 }
 567 
 568 int bnxt_qplib_alloc_rcfw_channel(struct pci_dev *pdev,
 569                                   struct bnxt_qplib_rcfw *rcfw,
 570                                   struct bnxt_qplib_ctx *ctx,
 571                                   int qp_tbl_sz)
 572 {
 573         u8 hwq_type;
 574 
 575         rcfw->pdev = pdev;
 576         rcfw->creq.max_elements = BNXT_QPLIB_CREQE_MAX_CNT;
 577         hwq_type = bnxt_qplib_get_hwq_type(rcfw->res);
 578         if (bnxt_qplib_alloc_init_hwq(rcfw->pdev, &rcfw->creq, NULL,
 579                                       &rcfw->creq.max_elements,
 580                                       BNXT_QPLIB_CREQE_UNITS,
 581                                       0, PAGE_SIZE, hwq_type)) {
 582                 dev_err(&rcfw->pdev->dev,
 583                         "HW channel CREQ allocation failed\n");
 584                 goto fail;
 585         }
 586         if (ctx->hwrm_intf_ver < HWRM_VERSION_RCFW_CMDQ_DEPTH_CHECK)
 587                 rcfw->cmdq_depth = BNXT_QPLIB_CMDQE_MAX_CNT_256;
 588         else
 589                 rcfw->cmdq_depth = BNXT_QPLIB_CMDQE_MAX_CNT_8192;
 590 
 591         rcfw->cmdq.max_elements = rcfw->cmdq_depth;
 592         if (bnxt_qplib_alloc_init_hwq
 593                         (rcfw->pdev, &rcfw->cmdq, NULL,
 594                          &rcfw->cmdq.max_elements,
 595                          BNXT_QPLIB_CMDQE_UNITS, 0,
 596                          bnxt_qplib_cmdqe_page_size(rcfw->cmdq_depth),
 597                          HWQ_TYPE_CTX)) {
 598                 dev_err(&rcfw->pdev->dev,
 599                         "HW channel CMDQ allocation failed\n");
 600                 goto fail;
 601         }
 602 
 603         rcfw->crsqe_tbl = kcalloc(rcfw->cmdq.max_elements,
 604                                   sizeof(*rcfw->crsqe_tbl), GFP_KERNEL);
 605         if (!rcfw->crsqe_tbl)
 606                 goto fail;
 607 
 608         rcfw->qp_tbl_size = qp_tbl_sz;
 609         rcfw->qp_tbl = kcalloc(qp_tbl_sz, sizeof(struct bnxt_qplib_qp_node),
 610                                GFP_KERNEL);
 611         if (!rcfw->qp_tbl)
 612                 goto fail;
 613 
 614         return 0;
 615 
 616 fail:
 617         bnxt_qplib_free_rcfw_channel(rcfw);
 618         return -ENOMEM;
 619 }
 620 
 621 void bnxt_qplib_rcfw_stop_irq(struct bnxt_qplib_rcfw *rcfw, bool kill)
 622 {
 623         bool gen_p5 = bnxt_qplib_is_chip_gen_p5(rcfw->res->cctx);
 624 
 625         tasklet_disable(&rcfw->worker);
 626         /* Mask h/w interrupts */
 627         bnxt_qplib_ring_creq_db(rcfw->creq_bar_reg_iomem, rcfw->creq.cons,
 628                                 rcfw->creq.max_elements, rcfw->creq_ring_id,
 629                                 gen_p5);
 630         /* Sync with last running IRQ-handler */
 631         synchronize_irq(rcfw->vector);
 632         if (kill)
 633                 tasklet_kill(&rcfw->worker);
 634 
 635         if (rcfw->requested) {
 636                 free_irq(rcfw->vector, rcfw);
 637                 rcfw->requested = false;
 638         }
 639 }
 640 
 641 void bnxt_qplib_disable_rcfw_channel(struct bnxt_qplib_rcfw *rcfw)
 642 {
 643         unsigned long indx;
 644 
 645         bnxt_qplib_rcfw_stop_irq(rcfw, true);
 646 
 647         iounmap(rcfw->cmdq_bar_reg_iomem);
 648         iounmap(rcfw->creq_bar_reg_iomem);
 649 
 650         indx = find_first_bit(rcfw->cmdq_bitmap, rcfw->bmap_size);
 651         if (indx != rcfw->bmap_size)
 652                 dev_err(&rcfw->pdev->dev,
 653                         "disabling RCFW with pending cmd-bit %lx\n", indx);
 654         kfree(rcfw->cmdq_bitmap);
 655         rcfw->bmap_size = 0;
 656 
 657         rcfw->cmdq_bar_reg_iomem = NULL;
 658         rcfw->creq_bar_reg_iomem = NULL;
 659         rcfw->aeq_handler = NULL;
 660         rcfw->vector = 0;
 661 }
 662 
 663 int bnxt_qplib_rcfw_start_irq(struct bnxt_qplib_rcfw *rcfw, int msix_vector,
 664                               bool need_init)
 665 {
 666         bool gen_p5 = bnxt_qplib_is_chip_gen_p5(rcfw->res->cctx);
 667         int rc;
 668 
 669         if (rcfw->requested)
 670                 return -EFAULT;
 671 
 672         rcfw->vector = msix_vector;
 673         if (need_init)
 674                 tasklet_init(&rcfw->worker,
 675                              bnxt_qplib_service_creq, (unsigned long)rcfw);
 676         else
 677                 tasklet_enable(&rcfw->worker);
 678         rc = request_irq(rcfw->vector, bnxt_qplib_creq_irq, 0,
 679                          "bnxt_qplib_creq", rcfw);
 680         if (rc)
 681                 return rc;
 682         rcfw->requested = true;
 683         bnxt_qplib_ring_creq_db_rearm(rcfw->creq_bar_reg_iomem,
 684                                       rcfw->creq.cons, rcfw->creq.max_elements,
 685                                       rcfw->creq_ring_id, gen_p5);
 686 
 687         return 0;
 688 }
 689 
 690 int bnxt_qplib_enable_rcfw_channel(struct pci_dev *pdev,
 691                                    struct bnxt_qplib_rcfw *rcfw,
 692                                    int msix_vector,
 693                                    int cp_bar_reg_off, int virt_fn,
 694                                    int (*aeq_handler)(struct bnxt_qplib_rcfw *,
 695                                                       void *, void *))
 696 {
 697         resource_size_t res_base;
 698         struct cmdq_init init;
 699         u16 bmap_size;
 700         int rc;
 701 
 702         /* General */
 703         rcfw->seq_num = 0;
 704         set_bit(FIRMWARE_FIRST_FLAG, &rcfw->flags);
 705         bmap_size = BITS_TO_LONGS(rcfw->cmdq_depth) * sizeof(unsigned long);
 706         rcfw->cmdq_bitmap = kzalloc(bmap_size, GFP_KERNEL);
 707         if (!rcfw->cmdq_bitmap)
 708                 return -ENOMEM;
 709         rcfw->bmap_size = bmap_size;
 710 
 711         /* CMDQ */
 712         rcfw->cmdq_bar_reg = RCFW_COMM_PCI_BAR_REGION;
 713         res_base = pci_resource_start(pdev, rcfw->cmdq_bar_reg);
 714         if (!res_base)
 715                 return -ENOMEM;
 716 
 717         rcfw->cmdq_bar_reg_iomem = ioremap_nocache(res_base +
 718                                               RCFW_COMM_BASE_OFFSET,
 719                                               RCFW_COMM_SIZE);
 720         if (!rcfw->cmdq_bar_reg_iomem) {
 721                 dev_err(&rcfw->pdev->dev, "CMDQ BAR region %d mapping failed\n",
 722                         rcfw->cmdq_bar_reg);
 723                 return -ENOMEM;
 724         }
 725 
 726         rcfw->cmdq_bar_reg_prod_off = virt_fn ? RCFW_VF_COMM_PROD_OFFSET :
 727                                         RCFW_PF_COMM_PROD_OFFSET;
 728 
 729         rcfw->cmdq_bar_reg_trig_off = RCFW_COMM_TRIG_OFFSET;
 730 
 731         /* CREQ */
 732         rcfw->creq_bar_reg = RCFW_COMM_CONS_PCI_BAR_REGION;
 733         res_base = pci_resource_start(pdev, rcfw->creq_bar_reg);
 734         if (!res_base)
 735                 dev_err(&rcfw->pdev->dev,
 736                         "CREQ BAR region %d resc start is 0!\n",
 737                         rcfw->creq_bar_reg);
 738         /* Unconditionally map 8 bytes to support 57500 series */
 739         rcfw->creq_bar_reg_iomem = ioremap_nocache(res_base + cp_bar_reg_off,
 740                                                    8);
 741         if (!rcfw->creq_bar_reg_iomem) {
 742                 dev_err(&rcfw->pdev->dev, "CREQ BAR region %d mapping failed\n",
 743                         rcfw->creq_bar_reg);
 744                 iounmap(rcfw->cmdq_bar_reg_iomem);
 745                 rcfw->cmdq_bar_reg_iomem = NULL;
 746                 return -ENOMEM;
 747         }
 748         rcfw->creq_qp_event_processed = 0;
 749         rcfw->creq_func_event_processed = 0;
 750 
 751         if (aeq_handler)
 752                 rcfw->aeq_handler = aeq_handler;
 753         init_waitqueue_head(&rcfw->waitq);
 754 
 755         rc = bnxt_qplib_rcfw_start_irq(rcfw, msix_vector, true);
 756         if (rc) {
 757                 dev_err(&rcfw->pdev->dev,
 758                         "Failed to request IRQ for CREQ rc = 0x%x\n", rc);
 759                 bnxt_qplib_disable_rcfw_channel(rcfw);
 760                 return rc;
 761         }
 762 
 763         init.cmdq_pbl = cpu_to_le64(rcfw->cmdq.pbl[PBL_LVL_0].pg_map_arr[0]);
 764         init.cmdq_size_cmdq_lvl = cpu_to_le16(
 765                 ((rcfw->cmdq_depth << CMDQ_INIT_CMDQ_SIZE_SFT) &
 766                  CMDQ_INIT_CMDQ_SIZE_MASK) |
 767                 ((rcfw->cmdq.level << CMDQ_INIT_CMDQ_LVL_SFT) &
 768                  CMDQ_INIT_CMDQ_LVL_MASK));
 769         init.creq_ring_id = cpu_to_le16(rcfw->creq_ring_id);
 770 
 771         /* Write to the Bono mailbox register */
 772         __iowrite32_copy(rcfw->cmdq_bar_reg_iomem, &init, sizeof(init) / 4);
 773         return 0;
 774 }
 775 
 776 struct bnxt_qplib_rcfw_sbuf *bnxt_qplib_rcfw_alloc_sbuf(
 777                 struct bnxt_qplib_rcfw *rcfw,
 778                 u32 size)
 779 {
 780         struct bnxt_qplib_rcfw_sbuf *sbuf;
 781 
 782         sbuf = kzalloc(sizeof(*sbuf), GFP_ATOMIC);
 783         if (!sbuf)
 784                 return NULL;
 785 
 786         sbuf->size = size;
 787         sbuf->sb = dma_alloc_coherent(&rcfw->pdev->dev, sbuf->size,
 788                                       &sbuf->dma_addr, GFP_ATOMIC);
 789         if (!sbuf->sb)
 790                 goto bail;
 791 
 792         return sbuf;
 793 bail:
 794         kfree(sbuf);
 795         return NULL;
 796 }
 797 
 798 void bnxt_qplib_rcfw_free_sbuf(struct bnxt_qplib_rcfw *rcfw,
 799                                struct bnxt_qplib_rcfw_sbuf *sbuf)
 800 {
 801         if (sbuf->sb)
 802                 dma_free_coherent(&rcfw->pdev->dev, sbuf->size,
 803                                   sbuf->sb, sbuf->dma_addr);
 804         kfree(sbuf);
 805 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c

DEFINITIONS
