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->async_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 if (BNXT_HAS_NQ(bp)) 50 bnxt_db_nq_arm(cpr); 51 else 52 B_CP_DB_REARM(cpr, cpr->cp_raw_cons); 53 } 54 55 int bnxt_free_int(struct bnxt *bp) 56 { 57 struct rte_intr_handle *intr_handle = &bp->pdev->intr_handle; 58 struct bnxt_irq *irq = bp->irq_tbl; 59 int rc = 0; 60 61 if (!irq) 62 return 0; 63 64 if (irq->requested) { 65 int count = 0; 66 67 /* 68 * Callback deregistration will fail with rc -EAGAIN if the 69 * callback is currently active. Retry every 50 ms until 70 * successful or 500 ms has elapsed. 71 */ 72 do { 73 rc = rte_intr_callback_unregister(intr_handle, 74 irq->handler, 75 bp->eth_dev); 76 if (rc >= 0) { 77 irq->requested = 0; 78 break; 79 } 80 rte_delay_ms(50); 81 } while (count++ < 10); 82 83 if (rc < 0) { 84 PMD_DRV_LOG(ERR, "irq cb unregister failed rc: %d\n", 85 rc); 86 return rc; 87 } 88 } 89 90 rte_free(bp->irq_tbl); 91 bp->irq_tbl = NULL; 92 93 return 0; 94 } 95 96 void bnxt_disable_int(struct bnxt *bp) 97 { 98 struct bnxt_cp_ring_info *cpr = bp->async_cp_ring; 99 100 if (BNXT_NUM_ASYNC_CPR(bp) == 0) 101 return; 102 103 if (!cpr || !cpr->cp_db.doorbell) 104 return; 105 106 /* Only the default completion ring */ 107 if (BNXT_HAS_NQ(bp)) 108 bnxt_db_nq(cpr); 109 else 110 B_CP_DB_DISARM(cpr); 111 } 112 113 void bnxt_enable_int(struct bnxt *bp) 114 { 115 struct bnxt_cp_ring_info *cpr = bp->async_cp_ring; 116 117 if (BNXT_NUM_ASYNC_CPR(bp) == 0) 118 return; 119 120 if (!cpr || !cpr->cp_db.doorbell) 121 return; 122 123 /* Only the default completion ring */ 124 if (BNXT_HAS_NQ(bp)) 125 bnxt_db_nq_arm(cpr); 126 else 127 B_CP_DB_ARM(cpr); 128 } 129 130 int bnxt_setup_int(struct bnxt *bp) 131 { 132 uint16_t total_vecs; 133 const int len = sizeof(bp->irq_tbl[0].name); 134 int i; 135 136 /* DPDK host only supports 1 MSI-X vector */ 137 total_vecs = 1; 138 bp->irq_tbl = rte_calloc("bnxt_irq_tbl", total_vecs, 139 sizeof(struct bnxt_irq), 0); 140 if (bp->irq_tbl) { 141 for (i = 0; i < total_vecs; i++) { 142 bp->irq_tbl[i].vector = i; 143 snprintf(bp->irq_tbl[i].name, len, 144 "%s-%d", bp->eth_dev->device->name, i); 145 bp->irq_tbl[i].handler = bnxt_int_handler; 146 } 147 } else { 148 PMD_DRV_LOG(ERR, "bnxt_irq_tbl setup failed\n"); 149 return -ENOMEM; 150 } 151 152 return 0; 153 } 154 155 int bnxt_request_int(struct bnxt *bp) 156 { 157 struct rte_intr_handle *intr_handle = &bp->pdev->intr_handle; 158 struct bnxt_irq *irq = bp->irq_tbl; 159 int rc = 0; 160 161 if (!irq) 162 return 0; 163 164 if (!irq->requested) { 165 rc = rte_intr_callback_register(intr_handle, 166 irq->handler, 167 bp->eth_dev); 168 if (!rc) 169 irq->requested = 1; 170 } 171 172 return rc; 173 } 174