-/**
- * Get PCI information by sysfs device path.
- *
- * @param dev_path
- * Pointer to device sysfs folder name.
- * @param[out] pci_addr
- * PCI bus address output buffer.
- *
- * @return
- * 0 on success, a negative errno value otherwise and rte_errno is set.
- */
-int
-mlx5_dev_to_pci_addr(const char *dev_path,
- struct rte_pci_addr *pci_addr)
-{
- FILE *file;
- char line[32];
- MKSTR(path, "%s/device/uevent", dev_path);
-
- file = fopen(path, "rb");
- if (file == NULL) {
- rte_errno = errno;
- return -rte_errno;
- }
- while (fgets(line, sizeof(line), file) == line) {
- size_t len = strlen(line);
- int ret;
-
- /* Truncate long lines. */
- if (len == (sizeof(line) - 1))
- while (line[(len - 1)] != '\n') {
- ret = fgetc(file);
- if (ret == EOF)
- break;
- line[(len - 1)] = ret;
- }
- /* Extract information. */
- if (sscanf(line,
- "PCI_SLOT_NAME="
- "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
- &pci_addr->domain,
- &pci_addr->bus,
- &pci_addr->devid,
- &pci_addr->function) == 4) {
- ret = 0;
- break;
- }
- }
- fclose(file);
- return 0;
-}
-
-static int
-mlx5_class_check_handler(__rte_unused const char *key, const char *value,
- void *opaque)
-{
- enum mlx5_class *ret = opaque;
-
- if (strcmp(value, "vdpa") == 0) {
- *ret = MLX5_CLASS_VDPA;
- } else if (strcmp(value, "net") == 0) {
- *ret = MLX5_CLASS_NET;
- } else {
- DRV_LOG(ERR, "Invalid mlx5 class %s. Maybe typo in device"
- " class argument setting?", value);
- *ret = MLX5_CLASS_INVALID;
- }
- return 0;
-}
-
-enum mlx5_class
-mlx5_class_get(struct rte_devargs *devargs)
-{
- struct rte_kvargs *kvlist;
- const char *key = MLX5_CLASS_ARG_NAME;
- enum mlx5_class ret = MLX5_CLASS_NET;
-
- if (devargs == NULL)
- return ret;
- kvlist = rte_kvargs_parse(devargs->args, NULL);
- if (kvlist == NULL)
- return ret;
- if (rte_kvargs_count(kvlist, key))
- rte_kvargs_process(kvlist, key, mlx5_class_check_handler, &ret);
- rte_kvargs_free(kvlist);
- return ret;
-}
-
-/**
- * Extract port name, as a number, from sysfs or netlink information.
- *
- * @param[in] port_name_in
- * String representing the port name.
- * @param[out] port_info_out
- * Port information, including port name as a number and port name
- * type if recognized
- *
- * @return
- * port_name field set according to recognized name format.
- */
-void
-mlx5_translate_port_name(const char *port_name_in,
- struct mlx5_switch_info *port_info_out)
-{
- char pf_c1, pf_c2, vf_c1, vf_c2;
- char *end;
- int sc_items;
-
- /*
- * Check for port-name as a string of the form pf0vf0
- * (support kernel ver >= 5.0 or OFED ver >= 4.6).
- */
- sc_items = sscanf(port_name_in, "%c%c%d%c%c%d",
- &pf_c1, &pf_c2, &port_info_out->pf_num,
- &vf_c1, &vf_c2, &port_info_out->port_name);
- if (sc_items == 6 &&
- pf_c1 == 'p' && pf_c2 == 'f' &&
- vf_c1 == 'v' && vf_c2 == 'f') {
- port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_PFVF;
- return;
- }
- /*
- * Check for port-name as a string of the form p0
- * (support kernel ver >= 5.0, or OFED ver >= 4.6).
- */
- sc_items = sscanf(port_name_in, "%c%d",
- &pf_c1, &port_info_out->port_name);
- if (sc_items == 2 && pf_c1 == 'p') {
- port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UPLINK;
- return;
- }
- /* Check for port-name as a number (support kernel ver < 5.0 */
- errno = 0;
- port_info_out->port_name = strtol(port_name_in, &end, 0);
- if (!errno &&
- (size_t)(end - port_name_in) == strlen(port_name_in)) {
- port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_LEGACY;
- return;
- }
- port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN;
- return;
-}
-
-#ifdef MLX5_GLUE
-
-/**
- * Suffix RTE_EAL_PMD_PATH with "-glue".
- *
- * This function performs a sanity check on RTE_EAL_PMD_PATH before
- * suffixing its last component.
- *
- * @param buf[out]
- * Output buffer, should be large enough otherwise NULL is returned.
- * @param size
- * Size of @p out.
- *
- * @return
- * Pointer to @p buf or @p NULL in case suffix cannot be appended.
- */
-static char *
-mlx5_glue_path(char *buf, size_t size)
-{
- static const char *const bad[] = { "/", ".", "..", NULL };
- const char *path = RTE_EAL_PMD_PATH;
- size_t len = strlen(path);
- size_t off;
- int i;
-
- while (len && path[len - 1] == '/')
- --len;
- for (off = len; off && path[off - 1] != '/'; --off)
- ;
- for (i = 0; bad[i]; ++i)
- if (!strncmp(path + off, bad[i], (int)(len - off)))
- goto error;
- i = snprintf(buf, size, "%.*s-glue", (int)len, path);
- if (i == -1 || (size_t)i >= size)
- goto error;
- return buf;
-error:
- RTE_LOG(ERR, PMD, "unable to append \"-glue\" to last component of"
- " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"), please"
- " re-configure DPDK");
- return NULL;
-}
-
-static int
-mlx5_glue_dlopen(void)
-{
- char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
- void *handle = NULL;
-
- const char *path[] = {
- /*
- * A basic security check is necessary before trusting
- * MLX5_GLUE_PATH, which may override RTE_EAL_PMD_PATH.
- */
- (geteuid() == getuid() && getegid() == getgid() ?
- getenv("MLX5_GLUE_PATH") : NULL),
- /*
- * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
- * variant, otherwise let dlopen() look up libraries on its
- * own.
- */
- (*RTE_EAL_PMD_PATH ?
- mlx5_glue_path(glue_path, sizeof(glue_path)) : ""),
- };
- unsigned int i = 0;
- void **sym;
- const char *dlmsg;
-
- while (!handle && i != RTE_DIM(path)) {
- const char *end;
- size_t len;
- int ret;
-
- if (!path[i]) {
- ++i;
- continue;
- }
- end = strpbrk(path[i], ":;");
- if (!end)
- end = path[i] + strlen(path[i]);
- len = end - path[i];
- ret = 0;
- do {
- char name[ret + 1];
-
- ret = snprintf(name, sizeof(name), "%.*s%s" MLX5_GLUE,
- (int)len, path[i],
- (!len || *(end - 1) == '/') ? "" : "/");
- if (ret == -1)
- break;
- if (sizeof(name) != (size_t)ret + 1)
- continue;
- DRV_LOG(DEBUG, "Looking for rdma-core glue as "
- "\"%s\"", name);
- handle = dlopen(name, RTLD_LAZY);
- break;
- } while (1);
- path[i] = end + 1;
- if (!*end)
- ++i;
- }
- if (!handle) {
- rte_errno = EINVAL;
- dlmsg = dlerror();
- if (dlmsg)
- DRV_LOG(WARNING, "Cannot load glue library: %s", dlmsg);
- goto glue_error;
- }
- sym = dlsym(handle, "mlx5_glue");
- if (!sym || !*sym) {
- rte_errno = EINVAL;
- dlmsg = dlerror();
- if (dlmsg)
- DRV_LOG(ERR, "Cannot resolve glue symbol: %s", dlmsg);
- goto glue_error;
- }
- mlx5_glue = *sym;
- return 0;
-
-glue_error:
- if (handle)
- dlclose(handle);
- return -1;
-}
-
-#endif
-