drivers/net/bnxt/bnxt_irq.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2014-2018 Broadcom
   3  * All rights reserved.
   4  */
   5
   6 #include <inttypes.h>
   7
   8 #include <rte_malloc.h>
   9
  10 #include "bnxt.h"
  11 #include "bnxt_cpr.h"
  12 #include "bnxt_irq.h"
  13 #include "bnxt_ring.h"
  14 #include "hsi_struct_def_dpdk.h"
  15
  16 /*
  17  * Interrupts
  18  */
  19
  20 static void bnxt_int_handler(void *param)
  21 {
  22         struct rte_eth_dev *eth_dev = (struct rte_eth_dev *)param;
  23         struct bnxt *bp = eth_dev->data->dev_private;
  24         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
  25         struct cmpl_base *cmp;
  26         uint32_t raw_cons;
  27         uint32_t cons;
  28
  29         if (cpr == NULL)
  30                 return;
  31
  32         raw_cons = cpr->cp_raw_cons;
  33         while (1) {
  34                 if (!cpr || !cpr->cp_ring_struct || !cpr->cp_db.doorbell)
  35                         return;
  36
  37                 cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
  38                 cmp = &cpr->cp_desc_ring[cons];
  39
  40                 if (!CMP_VALID(cmp, raw_cons, cpr->cp_ring_struct))
  41                         break;
  42
  43                 bnxt_event_hwrm_resp_handler(bp, cmp);
  44                 raw_cons = NEXT_RAW_CMP(raw_cons);
  45         };
  46
  47         cpr->cp_raw_cons = raw_cons;
  48         B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
  49 }
  50
  51 void bnxt_free_int(struct bnxt *bp)
  52 {
  53         struct bnxt_irq *irq;
  54
  55         if (bp->irq_tbl == NULL)
  56                 return;
  57
  58         irq = bp->irq_tbl;
  59         if (irq) {
  60                 if (irq->requested) {
  61                         rte_intr_callback_unregister(&bp->pdev->intr_handle,
  62                                                      irq->handler,
  63                                                      (void *)bp->eth_dev);
  64                         irq->requested = 0;
  65                 }
  66                 rte_free((void *)bp->irq_tbl);
  67                 bp->irq_tbl = NULL;
  68         }
  69 }
  70
  71 void bnxt_disable_int(struct bnxt *bp)
  72 {
  73         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
  74
  75         /* Only the default completion ring */
  76         if (cpr != NULL && cpr->cp_db.doorbell != NULL)
  77                 B_CP_DB_DISARM(cpr);
  78 }
  79
  80 void bnxt_enable_int(struct bnxt *bp)
  81 {
  82         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
  83
  84         /* Only the default completion ring */
  85         if (cpr != NULL && cpr->cp_db.doorbell != NULL)
  86                 B_CP_DB_ARM(cpr);
  87 }
  88
  89 int bnxt_setup_int(struct bnxt *bp)
  90 {
  91         uint16_t total_vecs;
  92         const int len = sizeof(bp->irq_tbl[0].name);
  93         int i, rc = 0;
  94
  95         /* DPDK host only supports 1 MSI-X vector */
  96         total_vecs = 1;
  97         bp->irq_tbl = rte_calloc("bnxt_irq_tbl", total_vecs,
  98                                  sizeof(struct bnxt_irq), 0);
  99         if (bp->irq_tbl) {
 100                 for (i = 0; i < total_vecs; i++) {
 101                         bp->irq_tbl[i].vector = i;
 102                         snprintf(bp->irq_tbl[i].name, len,
 103                                  "%s-%d", bp->eth_dev->device->name, i);
 104                         bp->irq_tbl[i].handler = bnxt_int_handler;
 105                 }
 106         } else {
 107                 rc = -ENOMEM;
 108                 goto setup_exit;
 109         }
 110         return 0;
 111
 112 setup_exit:
 113         PMD_DRV_LOG(ERR, "bnxt_irq_tbl setup failed\n");
 114         return rc;
 115 }
 116
 117 int bnxt_request_int(struct bnxt *bp)
 118 {
 119         int rc = 0;
 120
 121         struct bnxt_irq *irq = bp->irq_tbl;
 122
 123         rte_intr_callback_register(&bp->pdev->intr_handle, irq->handler,
 124                                    (void *)bp->eth_dev);
 125
 126         irq->requested = 1;
 127         return rc;
 128 }