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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2018 Intel Corporation
*/
/**
* @file
*
* Device specific vhost lib
*/
#include <stdbool.h>
#include <rte_malloc.h>
#include "rte_vdpa.h"
#include "vhost.h"
static struct rte_vdpa_device *vdpa_devices[MAX_VHOST_DEVICE];
static uint32_t vdpa_device_num;
static bool
is_same_vdpa_device(struct rte_vdpa_dev_addr *a,
struct rte_vdpa_dev_addr *b)
{
bool ret = true;
if (a->type != b->type)
return false;
switch (a->type) {
case PCI_ADDR:
if (a->pci_addr.domain != b->pci_addr.domain ||
a->pci_addr.bus != b->pci_addr.bus ||
a->pci_addr.devid != b->pci_addr.devid ||
a->pci_addr.function != b->pci_addr.function)
ret = false;
break;
default:
break;
}
return ret;
}
int
rte_vdpa_register_device(struct rte_vdpa_dev_addr *addr,
struct rte_vdpa_dev_ops *ops)
{
struct rte_vdpa_device *dev;
char device_name[MAX_VDPA_NAME_LEN];
int i;
if (vdpa_device_num >= MAX_VHOST_DEVICE || addr == NULL || ops == NULL)
return -1;
for (i = 0; i < MAX_VHOST_DEVICE; i++) {
dev = vdpa_devices[i];
if (dev && is_same_vdpa_device(&dev->addr, addr))
return -1;
}
for (i = 0; i < MAX_VHOST_DEVICE; i++) {
if (vdpa_devices[i] == NULL)
break;
}
if (i == MAX_VHOST_DEVICE)
return -1;
snprintf(device_name, sizeof(device_name), "vdpa-dev-%d", i);
dev = rte_zmalloc(device_name, sizeof(struct rte_vdpa_device),
RTE_CACHE_LINE_SIZE);
if (!dev)
return -1;
memcpy(&dev->addr, addr, sizeof(struct rte_vdpa_dev_addr));
dev->ops = ops;
vdpa_devices[i] = dev;
vdpa_device_num++;
return i;
}
int
rte_vdpa_unregister_device(int did)
{
if (did < 0 || did >= MAX_VHOST_DEVICE || vdpa_devices[did] == NULL)
return -1;
rte_free(vdpa_devices[did]);
vdpa_devices[did] = NULL;
vdpa_device_num--;
return did;
}
int
rte_vdpa_find_device_id(struct rte_vdpa_dev_addr *addr)
{
struct rte_vdpa_device *dev;
int i;
if (addr == NULL)
return -1;
for (i = 0; i < MAX_VHOST_DEVICE; ++i) {
dev = vdpa_devices[i];
if (dev && is_same_vdpa_device(&dev->addr, addr))
return i;
}
return -1;
}
struct rte_vdpa_device *
rte_vdpa_get_device(int did)
{
if (did < 0 || did >= MAX_VHOST_DEVICE)
return NULL;
return vdpa_devices[did];
}
int
rte_vdpa_get_device_num(void)
{
return vdpa_device_num;
}
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