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(void *param)
  49 {
  50         struct rte_eth_dev *eth_dev = (struct rte_eth_dev *)param;
  51         struct bnxt *bp = (struct bnxt *)eth_dev->data->dev_private;
  52         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
  53         uint32_t raw_cons = cpr->cp_raw_cons;
  54         uint32_t cons;
  55         struct cmpl_base *cmp;
  56
  57         while (1) {
  58                 if (!cpr || !cpr->cp_ring_struct)
  59                         return;
  60
  61                 cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
  62                 cmp = &cpr->cp_desc_ring[cons];
  63
  64                 if (!CMP_VALID(cmp, raw_cons, cpr->cp_ring_struct))
  65                         break;
  66
  67                 switch (CMP_TYPE(cmp)) {
  68                 case CMPL_BASE_TYPE_HWRM_ASYNC_EVENT:
  69                         /* Handle any async event */
  70                         bnxt_handle_async_event(bp, cmp);
  71                         break;
  72                 case CMPL_BASE_TYPE_HWRM_FWD_REQ:
  73                         /* Handle HWRM forwarded responses */
  74                         bnxt_handle_fwd_req(bp, cmp);
  75                         break;
  76                 default:
  77                         /* Ignore any other events */
  78                         if (cmp->type & rte_cpu_to_le_16(0x01)) {
  79                                 if (!CMP_VALID(cmp, raw_cons,
  80                                                cpr->cp_ring_struct))
  81                                         goto no_more;
  82                         }
  83                         RTE_LOG(INFO, PMD,
  84                                 "Ignoring %02x completion\n", CMP_TYPE(cmp));
  85                         break;
  86                 }
  87                 raw_cons = NEXT_RAW_CMP(raw_cons);
  88
  89         };
  90 no_more:
  91         cpr->cp_raw_cons = raw_cons;
  92         B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
  93 }
  94
  95 void bnxt_free_int(struct bnxt *bp)
  96 {
  97         struct bnxt_irq *irq;
  98
  99         irq = bp->irq_tbl;
 100         if (irq) {
 101                 if (irq->requested) {
 102                         rte_intr_disable(&bp->pdev->intr_handle);
 103                         rte_intr_callback_unregister(&bp->pdev->intr_handle,
 104                                                      irq->handler,
 105                                                      (void *)bp->eth_dev);
 106                         irq->requested = 0;
 107                 }
 108                 rte_free((void *)bp->irq_tbl);
 109                 bp->irq_tbl = NULL;
 110         }
 111 }
 112
 113 void bnxt_disable_int(struct bnxt *bp)
 114 {
 115         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
 116
 117         /* Only the default completion ring */
 118         if (cpr != NULL && cpr->cp_doorbell != NULL)
 119                 B_CP_DB_DISARM(cpr);
 120 }
 121
 122 void bnxt_enable_int(struct bnxt *bp)
 123 {
 124         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
 125
 126         B_CP_DB_ARM(cpr);
 127 }
 128
 129 int bnxt_setup_int(struct bnxt *bp)
 130 {
 131         uint16_t total_vecs;
 132         const int len = sizeof(bp->irq_tbl[0].name);
 133         int i, rc = 0;
 134
 135         /* DPDK host only supports 1 MSI-X vector */
 136         total_vecs = 1;
 137         bp->irq_tbl = rte_calloc("bnxt_irq_tbl", total_vecs,
 138                                  sizeof(struct bnxt_irq), 0);
 139         if (bp->irq_tbl) {
 140                 for (i = 0; i < total_vecs; i++) {
 141                         bp->irq_tbl[i].vector = i;
 142                         snprintf(bp->irq_tbl[i].name, len,
 143                                  "%s-%d", bp->eth_dev->device->name, i);
 144                         bp->irq_tbl[i].handler = bnxt_int_handler;
 145                 }
 146         } else {
 147                 rc = -ENOMEM;
 148                 goto setup_exit;
 149         }
 150         return 0;
 151
 152 setup_exit:
 153         RTE_LOG(ERR, PMD, "bnxt_irq_tbl setup failed\n");
 154         return rc;
 155 }
 156
 157 int bnxt_request_int(struct bnxt *bp)
 158 {
 159         int rc = 0;
 160
 161         struct bnxt_irq *irq = bp->irq_tbl;
 162
 163         rte_intr_callback_register(&bp->pdev->intr_handle, irq->handler,
 164                                    (void *)bp->eth_dev);
 165         rte_intr_enable(&bp->pdev->intr_handle);
 166
 167         irq->requested = 1;
 168         return rc;
 169 }