mirror of https://gitee.com/openkylin/qemu.git
126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
/*
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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 "qemu/osdep.h"
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#include "trace.h"
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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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rdma_error_report("addr is NULL");
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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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rdma_error_report("pci_dma_map fail, addr=0x%"PRIx64", len=%"PRId64,
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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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trace_rdma_pci_dma_map(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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trace_rdma_pci_dma_unmap(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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void rdma_protected_gqueue_init(RdmaProtectedGQueue *list)
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{
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qemu_mutex_init(&list->lock);
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list->list = g_queue_new();
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}
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void rdma_protected_gqueue_destroy(RdmaProtectedGQueue *list)
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{
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if (list->list) {
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g_queue_free_full(list->list, g_free);
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qemu_mutex_destroy(&list->lock);
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list->list = NULL;
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}
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}
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void rdma_protected_gqueue_append_int64(RdmaProtectedGQueue *list,
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int64_t value)
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{
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qemu_mutex_lock(&list->lock);
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g_queue_push_tail(list->list, g_memdup(&value, sizeof(value)));
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qemu_mutex_unlock(&list->lock);
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}
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int64_t rdma_protected_gqueue_pop_int64(RdmaProtectedGQueue *list)
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{
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int64_t *valp;
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int64_t val;
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qemu_mutex_lock(&list->lock);
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valp = g_queue_pop_head(list->list);
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qemu_mutex_unlock(&list->lock);
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if (!valp) {
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return -ENOENT;
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}
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val = *valp;
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g_free(valp);
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return val;
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}
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void rdma_protected_gslist_init(RdmaProtectedGSList *list)
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{
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qemu_mutex_init(&list->lock);
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}
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void rdma_protected_gslist_destroy(RdmaProtectedGSList *list)
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{
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if (list->list) {
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g_slist_free(list->list);
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qemu_mutex_destroy(&list->lock);
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list->list = NULL;
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}
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}
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void rdma_protected_gslist_append_int32(RdmaProtectedGSList *list,
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int32_t value)
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{
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qemu_mutex_lock(&list->lock);
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list->list = g_slist_prepend(list->list, GINT_TO_POINTER(value));
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qemu_mutex_unlock(&list->lock);
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}
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void rdma_protected_gslist_remove_int32(RdmaProtectedGSList *list,
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int32_t value)
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{
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qemu_mutex_lock(&list->lock);
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list->list = g_slist_remove(list->list, GINT_TO_POINTER(value));
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qemu_mutex_unlock(&list->lock);
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}
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