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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 "qemu/osdep.h"
#include "qapi/qmp/qlist.h"
#include "qapi/qmp/qnum.h"
#include "trace.h"
#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) {
rdma_error_report("addr is NULL");
return NULL;
}
p = pci_dma_map(dev, addr, &len, DMA_DIRECTION_TO_DEVICE);
if (!p) {
rdma_error_report("pci_dma_map fail, addr=0x%"PRIx64", len=%"PRId64,
addr, len);
return NULL;
}
if (len != plen) {
rdma_pci_dma_unmap(dev, p, len);
return NULL;
}
trace_rdma_pci_dma_map(addr, p, len);
return p;
}
void rdma_pci_dma_unmap(PCIDevice *dev, void *buffer, dma_addr_t len)
{
trace_rdma_pci_dma_unmap(buffer);
if (buffer) {
pci_dma_unmap(dev, buffer, len, DMA_DIRECTION_TO_DEVICE, 0);
}
}
void rdma_protected_qlist_init(RdmaProtectedQList *list)
{
qemu_mutex_init(&list->lock);
list->list = qlist_new();
}
void rdma_protected_qlist_destroy(RdmaProtectedQList *list)
{
if (list->list) {
qlist_destroy_obj(QOBJECT(list->list));
qemu_mutex_destroy(&list->lock);
list->list = NULL;
}
}
void rdma_protected_qlist_append_int64(RdmaProtectedQList *list, int64_t value)
{
qemu_mutex_lock(&list->lock);
qlist_append_int(list->list, value);
qemu_mutex_unlock(&list->lock);
}
int64_t rdma_protected_qlist_pop_int64(RdmaProtectedQList *list)
{
QObject *obj;
qemu_mutex_lock(&list->lock);
obj = qlist_pop(list->list);
qemu_mutex_unlock(&list->lock);
if (!obj) {
return -ENOENT;
}
return qnum_get_uint(qobject_to(QNum, obj));
}
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