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_cycles.h> 9 #include <rte_malloc.h> 10 11 #include "bnxt.h" 12 #include "bnxt_cpr.h" 13 #include "bnxt_irq.h" 14 #include "bnxt_ring.h" 15 #include "hsi_struct_def_dpdk.h" 16 17 /* 18 * Interrupts 19 */ 20 21 static void bnxt_int_handler(void *param) 22 { 23 struct rte_eth_dev *eth_dev = (struct rte_eth_dev *)param; 24 struct bnxt *bp = eth_dev->data->dev_private; 25 struct bnxt_cp_ring_info *cpr = bp->def_cp_ring; 26 struct cmpl_base *cmp; 27 uint32_t raw_cons; 28 uint32_t cons; 29 30 if (cpr == NULL) 31 return; 32 33 raw_cons = cpr->cp_raw_cons; 34 while (1) { 35 if (!cpr || !cpr->cp_ring_struct || !cpr->cp_db.doorbell) 36 return; 37 38 cons = RING_CMP(cpr->cp_ring_struct, raw_cons); 39 cmp = &cpr->cp_desc_ring[cons]; 40 41 if (!CMP_VALID(cmp, raw_cons, cpr->cp_ring_struct)) 42 break; 43 44 bnxt_event_hwrm_resp_handler(bp, cmp); 45 raw_cons = NEXT_RAW_CMP(raw_cons); 46 }; 47 48 cpr->cp_raw_cons = raw_cons; 49 B_CP_DB_REARM(cpr, cpr->cp_raw_cons); 50 } 51 52 int bnxt_free_int(struct bnxt *bp) 53 { 54 struct rte_intr_handle *intr_handle = &bp->pdev->intr_handle; 55 struct bnxt_irq *irq = bp->irq_tbl; 56 int rc = 0; 57 58 if (!irq) 59 return 0; 60 61 if (irq->requested) { 62 int count = 0; 63 64 /* 65 * Callback deregistration will fail with rc -EAGAIN if the 66 * callback is currently active. Retry every 50 ms until 67 * successful or 500 ms has elapsed. 68 */ 69 do { 70 rc = rte_intr_callback_unregister(intr_handle, 71 irq->handler, 72 bp->eth_dev); 73 if (rc >= 0) { 74 irq->requested = 0; 75 break; 76 } 77 rte_delay_ms(50); 78 } while (count++ < 10); 79 80 if (rc < 0) { 81 PMD_DRV_LOG(ERR, "irq cb unregister failed rc: %d\n", 82 rc); 83 return rc; 84 } 85 } 86 87 rte_free(bp->irq_tbl); 88 bp->irq_tbl = NULL; 89 90 return 0; 91 } 92 93 void bnxt_disable_int(struct bnxt *bp) 94 { 95 struct bnxt_cp_ring_info *cpr = bp->def_cp_ring; 96 97 /* Only the default completion ring */ 98 if (cpr != NULL && cpr->cp_db.doorbell != NULL) 99 B_CP_DB_DISARM(cpr); 100 } 101 102 void bnxt_enable_int(struct bnxt *bp) 103 { 104 struct bnxt_cp_ring_info *cpr = bp->def_cp_ring; 105 106 /* Only the default completion ring */ 107 if (cpr != NULL && cpr->cp_db.doorbell != NULL) 108 B_CP_DB_ARM(cpr); 109 } 110 111 int bnxt_setup_int(struct bnxt *bp) 112 { 113 uint16_t total_vecs; 114 const int len = sizeof(bp->irq_tbl[0].name); 115 int i, rc = 0; 116 117 /* DPDK host only supports 1 MSI-X vector */ 118 total_vecs = 1; 119 bp->irq_tbl = rte_calloc("bnxt_irq_tbl", total_vecs, 120 sizeof(struct bnxt_irq), 0); 121 if (bp->irq_tbl) { 122 for (i = 0; i < total_vecs; i++) { 123 bp->irq_tbl[i].vector = i; 124 snprintf(bp->irq_tbl[i].name, len, 125 "%s-%d", bp->eth_dev->device->name, i); 126 bp->irq_tbl[i].handler = bnxt_int_handler; 127 } 128 } else { 129 rc = -ENOMEM; 130 goto setup_exit; 131 } 132 return 0; 133 134 setup_exit: 135 PMD_DRV_LOG(ERR, "bnxt_irq_tbl setup failed\n"); 136 return rc; 137 } 138 139 int bnxt_request_int(struct bnxt *bp) 140 { 141 struct rte_intr_handle *intr_handle = &bp->pdev->intr_handle; 142 struct bnxt_irq *irq = bp->irq_tbl; 143 int rc = 0; 144 145 if (!irq) 146 return 0; 147 148 if (!irq->requested) { 149 rc = rte_intr_callback_register(intr_handle, 150 irq->handler, 151 bp->eth_dev); 152 if (!rc) 153 irq->requested = 1; 154 } 155 156 return rc; 157 } 158