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