Function pci_uio_alloc_resource

dpdk/drivers/bus/pci/bsd/pci.c:102–158

}

int
pci_uio_alloc_resource(struct rte_pci_device *dev,
		struct mapped_pci_resource **uio_res)
{
	char devname[PATH_MAX]; /* contains the /dev/uioX */
	struct rte_pci_addr *loc;
	int fd;

	loc = &dev->addr;

	snprintf(devname, sizeof(devname), "/dev/uio@pci:%u:%u:%u",
			dev->addr.bus, dev->addr.devid, dev->addr.function);

	fd = open(devname, O_RDWR);
	if (fd < 0) {
		if (errno == ENOENT) {
			RTE_LOG(WARNING, EAL, "  "PCI_PRI_FMT" not managed by UIO driver, "
					"skipping\n", loc->domain, loc->bus, loc->devid, loc->function);
			return 1;
		}
		RTE_LOG(ERR, EAL, "Failed to open device file for " PCI_PRI_FMT " (%s)",
				loc->domain, loc->bus, loc->devid, loc->function, devname);
		return -1;
	}

	/* save fd if in primary process */
	if (rte_intr_fd_set(dev->intr_handle, fd)) {
		RTE_LOG(WARNING, EAL, "Failed to save fd");
		goto error;
	}

	if (rte_intr_fd_get(dev->intr_handle) < 0) {
		RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
			devname, strerror(errno));
		goto error;
	}

	if (rte_intr_type_set(dev->intr_handle, RTE_INTR_HANDLE_UIO))
		goto error;

	/* allocate the mapping details for secondary processes*/
	*uio_res = rte_zmalloc("UIO_RES", sizeof(**uio_res), 0);
	if (*uio_res == NULL) {
		RTE_LOG(ERR, EAL,
			"%s(): cannot store uio mmap details\n", __func__);
		goto error;
	}

	strlcpy((*uio_res)->path, devname, sizeof((*uio_res)->path));
	memcpy(&(*uio_res)->pci_addr, &dev->addr, sizeof((*uio_res)->pci_addr));

	return 0;

error:
	pci_uio_free_resource(dev, *uio_res);
	return -1;
}