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         uint32_t raw_cons = cpr->cp_raw_cons;
  55         uint32_t cons;
  56         struct cmpl_base *cmp;
  57
  58         while (1) {
  59                 cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
  60                 cmp = &cpr->cp_desc_ring[cons];
  61
  62                 if (!CMP_VALID(cmp, raw_cons, cpr->cp_ring_struct))
  63                         break;
  64
  65                 switch (CMP_TYPE(cmp)) {
  66                 case CMPL_BASE_TYPE_HWRM_ASYNC_EVENT:
  67                         /* Handle any async event */
  68                         bnxt_handle_async_event(bp, cmp);
  69                         break;
  70                 case CMPL_BASE_TYPE_HWRM_FWD_RESP:
  71                         /* Handle HWRM forwarded responses */
  72                         bnxt_handle_fwd_req(bp, cmp);
  73                         break;
  74                 default:
  75                         /* Ignore any other events */
  76                         break;
  77                 }
  78                 raw_cons = NEXT_RAW_CMP(raw_cons);
  79         }
  80         B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
  81 }
  82
  83 void bnxt_free_int(struct bnxt *bp)
  84 {
  85         struct bnxt_irq *irq;
  86
  87         irq = bp->irq_tbl;
  88         if (irq) {
  89                 if (irq->requested) {
  90                         rte_intr_disable(&bp->pdev->intr_handle);
  91                         rte_intr_callback_unregister(&bp->pdev->intr_handle,
  92                                                      irq->handler,
  93                                                      (void *)bp->eth_dev);
  94                         irq->requested = 0;
  95                 }
  96                 rte_free((void *)bp->irq_tbl);
  97                 bp->irq_tbl = NULL;
  98         }
  99 }
 100
 101 void bnxt_disable_int(struct bnxt *bp)
 102 {
 103         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
 104
 105         /* Only the default completion ring */
 106         B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 107 }
 108
 109 void bnxt_enable_int(struct bnxt *bp)
 110 {
 111         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
 112
 113         B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
 114 }
 115
 116 int bnxt_setup_int(struct bnxt *bp)
 117 {
 118         uint16_t total_vecs;
 119         const int len = sizeof(bp->irq_tbl[0].name);
 120         int i, rc = 0;
 121
 122         /* DPDK host only supports 1 MSI-X vector */
 123         total_vecs = 1;
 124         bp->irq_tbl = rte_calloc("bnxt_irq_tbl", total_vecs,
 125                                  sizeof(struct bnxt_irq), 0);
 126         if (bp->irq_tbl) {
 127                 for (i = 0; i < total_vecs; i++) {
 128                         bp->irq_tbl[i].vector = i;
 129                         snprintf(bp->irq_tbl[i].name, len,
 130                                  "%s-%d", bp->eth_dev->data->name, i);
 131                         bp->irq_tbl[i].handler = bnxt_int_handler;
 132                 }
 133         } else {
 134                 rc = -ENOMEM;
 135                 goto setup_exit;
 136         }
 137         return 0;
 138
 139 setup_exit:
 140         RTE_LOG(ERR, PMD, "bnxt_irq_tbl setup failed");
 141         return rc;
 142 }
 143
 144 int bnxt_request_int(struct bnxt *bp)
 145 {
 146         int rc = 0;
 147
 148         struct bnxt_irq *irq = bp->irq_tbl;
 149
 150         rte_intr_callback_register(&bp->pdev->intr_handle, irq->handler,
 151                                    (void *)bp->eth_dev);
 152         rte_intr_enable(&bp->pdev->intr_handle);
 153
 154         irq->requested = 1;
 155         return rc;
 156 }