spin_lock_init(&fq->lock);
}
- smp_wmb();
-
iovad->fq = queue;
timer_setup(&iovad->fq_timer, fq_flush_timeout, 0);
return new_iova->pfn_lo;
}
+EXPORT_SYMBOL_GPL(alloc_iova_fast);
/**
* free_iova_fast - free iova pfn range into rcache
free_iova(iovad, pfn);
}
+EXPORT_SYMBOL_GPL(free_iova_fast);
#define fq_ring_for_each(i, fq) \
for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE)
unsigned long pfn, unsigned long pages,
unsigned long data)
{
- struct iova_fq *fq = raw_cpu_ptr(iovad->fq);
+ struct iova_fq *fq;
unsigned long flags;
unsigned idx;
+ /*
+ * Order against the IOMMU driver's pagetable update from unmapping
+ * @pte, to guarantee that iova_domain_flush() observes that if called
+ * from a different CPU before we release the lock below. Full barrier
+ * so it also pairs with iommu_dma_init_fq() to avoid seeing partially
+ * written fq state here.
+ */
+ smp_mb();
+
+ fq = raw_cpu_ptr(iovad->fq);
spin_lock_irqsave(&fq->lock, flags);
/*