drivers/net/bnxt/bnxt_irq.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2014-2015 Broadcom Corporation.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Broadcom Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <inttypes.h>
  35
  36 #include <rte_malloc.h>
  37
  38 #include "bnxt.h"
  39 #include "bnxt_cpr.h"
  40 #include "bnxt_irq.h"
  41 #include "bnxt_ring.h"
  42 #include "hsi_struct_def_dpdk.h"
  43
  44 /*
  45  * Interrupts
  46  */
  47
  48 static void bnxt_int_handler(struct rte_intr_handle *handle __rte_unused,
  49                              void *param)
  50 {
  51         struct rte_eth_dev *eth_dev = (struct rte_eth_dev *)param;
  52         struct bnxt *bp = (struct bnxt *)eth_dev->data->dev_private;
  53         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
  54         struct cmpl_base *cmp;
  55         uint32_t raw_cons;
  56         uint32_t cons;
  57
  58         if (cpr == NULL)
  59                 return;
  60
  61         raw_cons = cpr->cp_raw_cons;
  62         while (1) {
  63                 if (!cpr || !cpr->cp_ring_struct)
  64                         return;
  65
  66                 cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
  67                 cmp = &cpr->cp_desc_ring[cons];
  68
  69                 if (!CMP_VALID(cmp, raw_cons, cpr->cp_ring_struct))
  70                         break;
  71
  72                 switch (CMP_TYPE(cmp)) {
  73                 case CMPL_BASE_TYPE_HWRM_ASYNC_EVENT:
  74                         /* Handle any async event */
  75                         bnxt_handle_async_event(bp, cmp);
  76                         break;
  77                 case CMPL_BASE_TYPE_HWRM_FWD_RESP:
  78                         /* Handle HWRM forwarded responses */
  79                         bnxt_handle_fwd_req(bp, cmp);
  80                         break;
  81                 default:
  82                         /* Ignore any other events */
  83                         break;
  84                 }
  85                 raw_cons = NEXT_RAW_CMP(raw_cons);
  86         }
  87         B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
  88 }
  89
  90 void bnxt_free_int(struct bnxt *bp)
  91 {
  92         struct bnxt_irq *irq;
  93
  94         irq = bp->irq_tbl;
  95         if (irq) {
  96                 if (irq->requested) {
  97                         rte_intr_disable(&bp->pdev->intr_handle);
  98                         rte_intr_callback_unregister(&bp->pdev->intr_handle,
  99                                                      irq->handler,
 100                                                      (void *)bp->eth_dev);
 101                         irq->requested = 0;
 102                 }
 103                 rte_free((void *)bp->irq_tbl);
 104                 bp->irq_tbl = NULL;
 105         }
 106 }
 107
 108 void bnxt_disable_int(struct bnxt *bp)
 109 {
 110         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
 111
 112         /* Only the default completion ring */
 113         B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 114 }
 115
 116 void bnxt_enable_int(struct bnxt *bp)
 117 {
 118         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
 119
 120         B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
 121 }
 122
 123 int bnxt_setup_int(struct bnxt *bp)
 124 {
 125         uint16_t total_vecs;
 126         const int len = sizeof(bp->irq_tbl[0].name);
 127         int i, rc = 0;
 128
 129         /* DPDK host only supports 1 MSI-X vector */
 130         total_vecs = 1;
 131         bp->irq_tbl = rte_calloc("bnxt_irq_tbl", total_vecs,
 132                                  sizeof(struct bnxt_irq), 0);
 133         if (bp->irq_tbl) {
 134                 for (i = 0; i < total_vecs; i++) {
 135                         bp->irq_tbl[i].vector = i;
 136                         snprintf(bp->irq_tbl[i].name, len,
 137                                  "%s-%d", bp->eth_dev->data->name, i);
 138                         bp->irq_tbl[i].handler = bnxt_int_handler;
 139                 }
 140         } else {
 141                 rc = -ENOMEM;
 142                 goto setup_exit;
 143         }
 144         return 0;
 145
 146 setup_exit:
 147         RTE_LOG(ERR, PMD, "bnxt_irq_tbl setup failed");
 148         return rc;
 149 }
 150
 151 int bnxt_request_int(struct bnxt *bp)
 152 {
 153         int rc = 0;
 154
 155         struct bnxt_irq *irq = bp->irq_tbl;
 156
 157         rte_intr_callback_register(&bp->pdev->intr_handle, irq->handler,
 158                                    (void *)bp->eth_dev);
 159         rte_intr_enable(&bp->pdev->intr_handle);
 160
 161         irq->requested = 1;
 162         return rc;
 163 }