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/*
* QEMU paravirtual RDMA - Generic RDMA backend
*
* Copyright (C) 2018 Oracle
* Copyright (C) 2018 Red Hat Inc
*
* Authors:
* Yuval Shaia <yuval.shaia@oracle.com>
* Marcel Apfelbaum <marcel@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "rdma_utils.h"
void *rdma_pci_dma_map(PCIDevice *dev, dma_addr_t addr, dma_addr_t plen)
{
void *p;
hwaddr len = plen;
if (!addr) {
pr_dbg("addr is NULL\n");
return NULL;
}
p = pci_dma_map(dev, addr, &len, DMA_DIRECTION_TO_DEVICE);
if (!p) {
pr_dbg("Fail in pci_dma_map, addr=0x%llx, len=%ld\n",
(long long unsigned int)addr, len);
return NULL;
}
if (len != plen) {
rdma_pci_dma_unmap(dev, p, len);
return NULL;
}
pr_dbg("0x%llx -> %p (len=%ld)\n", (long long unsigned int)addr, p, len);
return p;
}
void rdma_pci_dma_unmap(PCIDevice *dev, void *buffer, dma_addr_t len)
{
pr_dbg("%p\n", buffer);
if (buffer) {
pci_dma_unmap(dev, buffer, len, DMA_DIRECTION_TO_DEVICE, 0);
}
}
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