LXR qemu/hw/rdma/rdma

   1/*
   2 * QEMU paravirtual RDMA - Generic RDMA backend
   3 *
   4 * Copyright (C) 2018 Oracle
   5 * Copyright (C) 2018 Red Hat Inc
   6 *
   7 * Authors:
   8 *     Yuval Shaia <yuval.shaia@oracle.com>
   9 *     Marcel Apfelbaum <marcel@redhat.com>
  10 *
  11 * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12 * See the COPYING file in the top-level directory.
  13 *
  14 */
  15
  16#include "qemu/osdep.h"
  17#include "qapi/qmp/qlist.h"
  18#include "qapi/qmp/qnum.h"
  19#include "trace.h"
  20#include "rdma_utils.h"
  21
  22void *rdma_pci_dma_map(PCIDevice *dev, dma_addr_t addr, dma_addr_t plen)
  23{
  24    void *p;
  25    hwaddr len = plen;
  26
  27    if (!addr) {
  28        rdma_error_report("addr is NULL");
  29        return NULL;
  30    }
  31
  32    p = pci_dma_map(dev, addr, &len, DMA_DIRECTION_TO_DEVICE);
  33    if (!p) {
  34        rdma_error_report("pci_dma_map fail, addr=0x%"PRIx64", len=%"PRId64,
  35                          addr, len);
  36        return NULL;
  37    }
  38
  39    if (len != plen) {
  40        rdma_pci_dma_unmap(dev, p, len);
  41        return NULL;
  42    }
  43
  44    trace_rdma_pci_dma_map(addr, p, len);
  45
  46    return p;
  47}
  48
  49void rdma_pci_dma_unmap(PCIDevice *dev, void *buffer, dma_addr_t len)
  50{
  51    trace_rdma_pci_dma_unmap(buffer);
  52    if (buffer) {
  53        pci_dma_unmap(dev, buffer, len, DMA_DIRECTION_TO_DEVICE, 0);
  54    }
  55}
  56
  57void rdma_protected_qlist_init(RdmaProtectedQList *list)
  58{
  59    qemu_mutex_init(&list->lock);
  60    list->list = qlist_new();
  61}
  62
  63void rdma_protected_qlist_destroy(RdmaProtectedQList *list)
  64{
  65    if (list->list) {
  66        qlist_destroy_obj(QOBJECT(list->list));
  67        qemu_mutex_destroy(&list->lock);
  68        list->list = NULL;
  69    }
  70}
  71
  72void rdma_protected_qlist_append_int64(RdmaProtectedQList *list, int64_t value)
  73{
  74    qemu_mutex_lock(&list->lock);
  75    qlist_append_int(list->list, value);
  76    qemu_mutex_unlock(&list->lock);
  77}
  78
  79int64_t rdma_protected_qlist_pop_int64(RdmaProtectedQList *list)
  80{
  81    QObject *obj;
  82
  83    qemu_mutex_lock(&list->lock);
  84    obj = qlist_pop(list->list);
  85    qemu_mutex_unlock(&list->lock);
  86
  87    if (!obj) {
  88        return -ENOENT;
  89    }
  90
  91    return qnum_get_uint(qobject_to(QNum, obj));
  92}
  93
  94void rdma_protected_gslist_init(RdmaProtectedGSList *list)
  95{
  96    qemu_mutex_init(&list->lock);
  97}
  98
  99void rdma_protected_gslist_destroy(RdmaProtectedGSList *list)
 100{
 101    if (list->list) {
 102        g_slist_free(list->list);
 103        list->list = NULL;
 104    }
 105}
 106
 107void rdma_protected_gslist_append_int32(RdmaProtectedGSList *list,
 108                                        int32_t value)
 109{
 110    qemu_mutex_lock(&list->lock);
 111    list->list = g_slist_prepend(list->list, GINT_TO_POINTER(value));
 112    qemu_mutex_unlock(&list->lock);
 113}
 114
 115void rdma_protected_gslist_remove_int32(RdmaProtectedGSList *list,
 116                                        int32_t value)
 117{
 118    qemu_mutex_lock(&list->lock);
 119    list->list = g_slist_remove(list->list, GINT_TO_POINTER(value));
 120    qemu_mutex_unlock(&list->lock);
 121}
 122