-
-/* Extract I/O port numbers from sysfs */
-static int
-virtio_resource_init_by_uio(struct rte_pci_device *pci_dev)
-{
- char dirname[PATH_MAX];
- char filename[PATH_MAX];
- unsigned long start, size;
- unsigned int uio_num;
-
- if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0)
- return -1;
-
- /* get portio size */
- snprintf(filename, sizeof(filename),
- "%s/portio/port0/size", dirname);
- if (parse_sysfs_value(filename, &size) < 0) {
- PMD_INIT_LOG(ERR, "%s(): cannot parse size",
- __func__);
- return -1;
- }
-
- /* get portio start */
- snprintf(filename, sizeof(filename),
- "%s/portio/port0/start", dirname);
- if (parse_sysfs_value(filename, &start) < 0) {
- PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
- __func__);
- return -1;
- }
- pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
- pci_dev->mem_resource[0].len = (uint64_t)size;
- PMD_INIT_LOG(DEBUG,
- "PCI Port IO found start=0x%lx with size=0x%lx",
- start, size);
-
- /* save fd */
- memset(dirname, 0, sizeof(dirname));
- snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num);
- pci_dev->intr_handle.fd = open(dirname, O_RDWR);
- if (pci_dev->intr_handle.fd < 0) {
- PMD_INIT_LOG(ERR, "Cannot open %s: %s\n",
- dirname, strerror(errno));
- return -1;
- }
-
- pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
- pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC;
-
- return 0;
-}
-
-/* Extract port I/O numbers from proc/ioports */
-static int
-virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev)
-{
- uint16_t start, end;
- int size;
- FILE *fp;
- char *line = NULL;
- char pci_id[16];
- int found = 0;
- size_t linesz;
-
- snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
- pci_dev->addr.domain,
- pci_dev->addr.bus,
- pci_dev->addr.devid,
- pci_dev->addr.function);
-
- fp = fopen("/proc/ioports", "r");
- if (fp == NULL) {
- PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__);
- return -1;
- }
-
- while (getdelim(&line, &linesz, '\n', fp) > 0) {
- char *ptr = line;
- char *left;
- int n;
-
- n = strcspn(ptr, ":");
- ptr[n] = 0;
- left = &ptr[n + 1];
-
- while (*left && isspace(*left))
- left++;
-
- if (!strncmp(left, pci_id, strlen(pci_id))) {
- found = 1;
-
- while (*ptr && isspace(*ptr))
- ptr++;
-
- sscanf(ptr, "%04hx-%04hx", &start, &end);
- size = end - start + 1;
-
- break;
- }
- }
-
- free(line);
- fclose(fp);
-
- if (!found)
- return -1;
-
- pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start;
- pci_dev->mem_resource[0].len = (uint64_t)size;
- PMD_INIT_LOG(DEBUG,
- "PCI Port IO found start=0x%x with size=0x%x",
- start, size);
-
- /* can't support lsc interrupt without uio */
- pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
-
- return 0;
-}
-
-/* Extract I/O port numbers from sysfs */
-static int
-legacy_virtio_resource_init(struct rte_pci_device *pci_dev)
-{
- if (virtio_resource_init_by_uio(pci_dev) == 0)
- return 0;
- else
- return virtio_resource_init_by_ioports(pci_dev);
-}
-