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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2014-2018 Broadcom
* All rights reserved.
*/
#include <inttypes.h>
#include <rte_cycles.h>
#include <rte_malloc.h>
#include "bnxt.h"
#include "bnxt_irq.h"
#include "bnxt_ring.h"
#include "hsi_struct_def_dpdk.h"
/*
* Interrupts
*/
void bnxt_int_handler(void *param)
{
struct rte_eth_dev *eth_dev = (struct rte_eth_dev *)param;
struct bnxt *bp = eth_dev->data->dev_private;
struct bnxt_cp_ring_info *cpr = bp->async_cp_ring;
struct cmpl_base *cmp;
uint32_t raw_cons;
uint32_t cons;
if (cpr == NULL)
return;
raw_cons = cpr->cp_raw_cons;
pthread_mutex_lock(&bp->def_cp_lock);
while (1) {
if (!cpr || !cpr->cp_ring_struct || !cpr->cp_db.doorbell) {
pthread_mutex_unlock(&bp->def_cp_lock);
return;
}
if (is_bnxt_in_error(bp)) {
pthread_mutex_unlock(&bp->def_cp_lock);
return;
}
cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
cmp = &cpr->cp_desc_ring[cons];
if (!CMP_VALID(cmp, raw_cons, cpr->cp_ring_struct))
break;
bnxt_event_hwrm_resp_handler(bp, cmp);
raw_cons = NEXT_RAW_CMP(raw_cons);
}
cpr->cp_raw_cons = raw_cons;
if (BNXT_HAS_NQ(bp))
bnxt_db_nq_arm(cpr);
else
B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
pthread_mutex_unlock(&bp->def_cp_lock);
}
int bnxt_free_int(struct bnxt *bp)
{
struct rte_intr_handle *intr_handle = &bp->pdev->intr_handle;
struct bnxt_irq *irq = bp->irq_tbl;
int rc = 0;
if (!irq)
return 0;
if (irq->requested) {
int count = 0;
/*
* Callback deregistration will fail with rc -EAGAIN if the
* callback is currently active. Retry every 50 ms until
* successful or 500 ms has elapsed.
*/
do {
rc = rte_intr_callback_unregister(intr_handle,
irq->handler,
bp->eth_dev);
if (rc >= 0) {
irq->requested = 0;
break;
}
rte_delay_ms(50);
} while (count++ < 10);
if (rc < 0) {
PMD_DRV_LOG(ERR, "irq cb unregister failed rc: %d\n",
rc);
return rc;
}
}
rte_free(bp->irq_tbl);
bp->irq_tbl = NULL;
return 0;
}
void bnxt_disable_int(struct bnxt *bp)
{
struct bnxt_cp_ring_info *cpr = bp->async_cp_ring;
if (BNXT_NUM_ASYNC_CPR(bp) == 0)
return;
if (is_bnxt_in_error(bp))
return;
if (!cpr || !cpr->cp_db.doorbell)
return;
/* Only the default completion ring */
if (BNXT_HAS_NQ(bp))
bnxt_db_nq(cpr);
else
B_CP_DB_DISARM(cpr);
}
void bnxt_enable_int(struct bnxt *bp)
{
struct bnxt_cp_ring_info *cpr = bp->async_cp_ring;
if (BNXT_NUM_ASYNC_CPR(bp) == 0)
return;
if (!cpr || !cpr->cp_db.doorbell)
return;
/* Only the default completion ring */
if (BNXT_HAS_NQ(bp))
bnxt_db_nq_arm(cpr);
else
B_CP_DB_ARM(cpr);
}
int bnxt_setup_int(struct bnxt *bp)
{
uint16_t total_vecs;
const int len = sizeof(bp->irq_tbl[0].name);
int i;
/* DPDK host only supports 1 MSI-X vector */
total_vecs = 1;
bp->irq_tbl = rte_calloc("bnxt_irq_tbl", total_vecs,
sizeof(struct bnxt_irq), 0);
if (bp->irq_tbl) {
for (i = 0; i < total_vecs; i++) {
bp->irq_tbl[i].vector = i;
snprintf(bp->irq_tbl[i].name, len,
"%s-%d", bp->eth_dev->device->name, i);
bp->irq_tbl[i].handler = bnxt_int_handler;
}
} else {
PMD_DRV_LOG(ERR, "bnxt_irq_tbl setup failed\n");
return -ENOMEM;
}
return 0;
}
int bnxt_request_int(struct bnxt *bp)
{
struct rte_intr_handle *intr_handle = &bp->pdev->intr_handle;
struct bnxt_irq *irq = bp->irq_tbl;
int rc = 0;
if (!irq)
return 0;
if (!irq->requested) {
rc = rte_intr_callback_register(intr_handle,
irq->handler,
bp->eth_dev);
if (!rc)
irq->requested = 1;
}
#ifdef RTE_EXEC_ENV_FREEBSD
/**
* In FreeBSD OS, nic_uio does not support interrupts and
* interrupt register callback will fail.
*/
rc = 0;
#endif
return rc;
}
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