if_irq_t
int iflib_irq_alloc(if_ctx_t, if_irq_t, int, driver_filter_t, void *filter_arg,
int iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid,
void iflib_softirq_alloc_generic(if_ctx_t ctx, if_irq_t irq,
void iflib_irq_free(if_ctx_t ctx, if_irq_t irq);
int iflib_irq_alloc_generic_subctx(if_ctx_t ctx, if_ctx_t subctx, if_irq_t irq,
_iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
iflib_irq_set_affinity(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type,
iflib_irq_alloc_generic_subctx(if_ctx_t ctx, if_ctx_t subctx, if_irq_t irq,
iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid,
iflib_softirq_alloc_generic(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type,
iflib_irq_free(if_ctx_t ctx, if_irq_t irq)
if_irq_t irq = &ctx->ifc_legacy_irq;