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)
  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         irq = bp->irq_tbl;
  56         if (irq) {
  57                 if (irq->requested) {
  58                         rte_intr_disable(&bp->pdev->intr_handle);
  59                         rte_intr_callback_unregister(&bp->pdev->intr_handle,
  60                                                      irq->handler,
  61                                                      (void *)bp->eth_dev);
  62                         irq->requested = 0;
  63                 }
  64                 rte_free((void *)bp->irq_tbl);
  65                 bp->irq_tbl = NULL;
  66         }
  67 }
  68
  69 void bnxt_disable_int(struct bnxt *bp)
  70 {
  71         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
  72
  73         /* Only the default completion ring */
  74         if (cpr != NULL && cpr->cp_db.doorbell != NULL)
  75                 B_CP_DB_DISARM(cpr);
  76 }
  77
  78 void bnxt_enable_int(struct bnxt *bp)
  79 {
  80         struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
  81
  82         /* Only the default completion ring */
  83         if (cpr != NULL && cpr->cp_db.doorbell != NULL)
  84                 B_CP_DB_ARM(cpr);
  85 }
  86
  87 int bnxt_setup_int(struct bnxt *bp)
  88 {
  89         uint16_t total_vecs;
  90         const int len = sizeof(bp->irq_tbl[0].name);
  91         int i, rc = 0;
  92
  93         /* DPDK host only supports 1 MSI-X vector */
  94         total_vecs = 1;
  95         bp->irq_tbl = rte_calloc("bnxt_irq_tbl", total_vecs,
  96                                  sizeof(struct bnxt_irq), 0);
  97         if (bp->irq_tbl) {
  98                 for (i = 0; i < total_vecs; i++) {
  99                         bp->irq_tbl[i].vector = i;
 100                         snprintf(bp->irq_tbl[i].name, len,
 101                                  "%s-%d", bp->eth_dev->device->name, i);
 102                         bp->irq_tbl[i].handler = bnxt_int_handler;
 103                 }
 104         } else {
 105                 rc = -ENOMEM;
 106                 goto setup_exit;
 107         }
 108         return 0;
 109
 110 setup_exit:
 111         PMD_DRV_LOG(ERR, "bnxt_irq_tbl setup failed\n");
 112         return rc;
 113 }
 114
 115 int bnxt_request_int(struct bnxt *bp)
 116 {
 117         int rc = 0;
 118
 119         struct bnxt_irq *irq = bp->irq_tbl;
 120
 121         rte_intr_callback_register(&bp->pdev->intr_handle, irq->handler,
 122                                    (void *)bp->eth_dev);
 123         rte_intr_enable(&bp->pdev->intr_handle);
 124
 125         irq->requested = 1;
 126         return rc;
 127 }