1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2019 Mellanox Technologies, Ltd
8 #ifdef RTE_IBVERBS_LINK_DLOPEN
12 #include <rte_errno.h>
14 #include "mlx5_common.h"
15 #include "mlx5_common_utils.h"
16 #include "mlx5_glue.h"
19 int mlx5_common_logtype;
23 * Get PCI information by sysfs device path.
26 * Pointer to device sysfs folder name.
27 * @param[out] pci_addr
28 * PCI bus address output buffer.
31 * 0 on success, a negative errno value otherwise and rte_errno is set.
34 mlx5_dev_to_pci_addr(const char *dev_path,
35 struct rte_pci_addr *pci_addr)
39 MKSTR(path, "%s/device/uevent", dev_path);
41 file = fopen(path, "rb");
46 while (fgets(line, sizeof(line), file) == line) {
47 size_t len = strlen(line);
50 /* Truncate long lines. */
51 if (len == (sizeof(line) - 1))
52 while (line[(len - 1)] != '\n') {
56 line[(len - 1)] = ret;
58 /* Extract information. */
61 "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
65 &pci_addr->function) == 4) {
75 mlx5_class_check_handler(__rte_unused const char *key, const char *value,
78 enum mlx5_class *ret = opaque;
80 if (strcmp(value, "vdpa") == 0) {
81 *ret = MLX5_CLASS_VDPA;
82 } else if (strcmp(value, "net") == 0) {
83 *ret = MLX5_CLASS_NET;
85 DRV_LOG(ERR, "Invalid mlx5 class %s. Maybe typo in device"
86 " class argument setting?", value);
87 *ret = MLX5_CLASS_INVALID;
93 mlx5_class_get(struct rte_devargs *devargs)
95 struct rte_kvargs *kvlist;
96 const char *key = MLX5_CLASS_ARG_NAME;
97 enum mlx5_class ret = MLX5_CLASS_NET;
101 kvlist = rte_kvargs_parse(devargs->args, NULL);
104 if (rte_kvargs_count(kvlist, key))
105 rte_kvargs_process(kvlist, key, mlx5_class_check_handler, &ret);
106 rte_kvargs_free(kvlist);
111 * Extract port name, as a number, from sysfs or netlink information.
113 * @param[in] port_name_in
114 * String representing the port name.
115 * @param[out] port_info_out
116 * Port information, including port name as a number and port name
120 * port_name field set according to recognized name format.
123 mlx5_translate_port_name(const char *port_name_in,
124 struct mlx5_switch_info *port_info_out)
126 char pf_c1, pf_c2, vf_c1, vf_c2;
131 * Check for port-name as a string of the form pf0vf0
132 * (support kernel ver >= 5.0 or OFED ver >= 4.6).
134 sc_items = sscanf(port_name_in, "%c%c%d%c%c%d",
135 &pf_c1, &pf_c2, &port_info_out->pf_num,
136 &vf_c1, &vf_c2, &port_info_out->port_name);
138 pf_c1 == 'p' && pf_c2 == 'f' &&
139 vf_c1 == 'v' && vf_c2 == 'f') {
140 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_PFVF;
144 * Check for port-name as a string of the form p0
145 * (support kernel ver >= 5.0, or OFED ver >= 4.6).
147 sc_items = sscanf(port_name_in, "%c%d",
148 &pf_c1, &port_info_out->port_name);
149 if (sc_items == 2 && pf_c1 == 'p') {
150 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UPLINK;
153 /* Check for port-name as a number (support kernel ver < 5.0 */
155 port_info_out->port_name = strtol(port_name_in, &end, 0);
157 (size_t)(end - port_name_in) == strlen(port_name_in)) {
158 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_LEGACY;
161 port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN;
165 #ifdef RTE_IBVERBS_LINK_DLOPEN
168 * Suffix RTE_EAL_PMD_PATH with "-glue".
170 * This function performs a sanity check on RTE_EAL_PMD_PATH before
171 * suffixing its last component.
174 * Output buffer, should be large enough otherwise NULL is returned.
179 * Pointer to @p buf or @p NULL in case suffix cannot be appended.
182 mlx5_glue_path(char *buf, size_t size)
184 static const char *const bad[] = { "/", ".", "..", NULL };
185 const char *path = RTE_EAL_PMD_PATH;
186 size_t len = strlen(path);
190 while (len && path[len - 1] == '/')
192 for (off = len; off && path[off - 1] != '/'; --off)
194 for (i = 0; bad[i]; ++i)
195 if (!strncmp(path + off, bad[i], (int)(len - off)))
197 i = snprintf(buf, size, "%.*s-glue", (int)len, path);
198 if (i == -1 || (size_t)i >= size)
202 RTE_LOG(ERR, PMD, "unable to append \"-glue\" to last component of"
203 " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"), please"
204 " re-configure DPDK");
210 * Initialization routine for run-time dependency on rdma-core.
212 RTE_INIT_PRIO(mlx5_glue_init, CLASS)
214 /* Initialize common log type. */
215 mlx5_common_logtype = rte_log_register("pmd.common.mlx5");
216 if (mlx5_common_logtype >= 0)
217 rte_log_set_level(mlx5_common_logtype, RTE_LOG_NOTICE);
219 * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
220 * huge pages. Calling ibv_fork_init() during init allows
221 * applications to use fork() safely for purposes other than
222 * using this PMD, which is not supported in forked processes.
224 setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
225 /* Match the size of Rx completion entry to the size of a cacheline. */
226 if (RTE_CACHE_LINE_SIZE == 128)
227 setenv("MLX5_CQE_SIZE", "128", 0);
229 * MLX5_DEVICE_FATAL_CLEANUP tells ibv_destroy functions to
230 * cleanup all the Verbs resources even when the device was removed.
232 setenv("MLX5_DEVICE_FATAL_CLEANUP", "1", 1);
233 /* The glue initialization was done earlier by mlx5 common library. */
234 #ifdef RTE_IBVERBS_LINK_DLOPEN
235 char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
238 const char *path[] = {
240 * A basic security check is necessary before trusting
241 * MLX5_GLUE_PATH, which may override RTE_EAL_PMD_PATH.
243 (geteuid() == getuid() && getegid() == getgid() ?
244 getenv("MLX5_GLUE_PATH") : NULL),
246 * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
247 * variant, otherwise let dlopen() look up libraries on its
251 mlx5_glue_path(glue_path, sizeof(glue_path)) : ""),
257 while (!handle && i != RTE_DIM(path)) {
266 end = strpbrk(path[i], ":;");
268 end = path[i] + strlen(path[i]);
274 ret = snprintf(name, sizeof(name), "%.*s%s" MLX5_GLUE,
276 (!len || *(end - 1) == '/') ? "" : "/");
279 if (sizeof(name) != (size_t)ret + 1)
281 DRV_LOG(DEBUG, "Looking for rdma-core glue as "
283 handle = dlopen(name, RTLD_LAZY);
294 DRV_LOG(WARNING, "Cannot load glue library: %s", dlmsg);
297 sym = dlsym(handle, "mlx5_glue");
302 DRV_LOG(ERR, "Cannot resolve glue symbol: %s", dlmsg);
306 #endif /* RTE_IBVERBS_LINK_DLOPEN */
307 #ifdef RTE_LIBRTE_MLX5_DEBUG
308 /* Glue structure must not contain any NULL pointers. */
312 for (i = 0; i != sizeof(*mlx5_glue) / sizeof(void *); ++i)
313 MLX5_ASSERT(((const void *const *)mlx5_glue)[i]);
316 if (strcmp(mlx5_glue->version, MLX5_GLUE_VERSION)) {
318 DRV_LOG(ERR, "rdma-core glue \"%s\" mismatch: \"%s\" is "
319 "required", mlx5_glue->version, MLX5_GLUE_VERSION);
322 mlx5_glue->fork_init();
325 #ifdef RTE_IBVERBS_LINK_DLOPEN
329 DRV_LOG(WARNING, "Cannot initialize MLX5 common due to missing"
330 " run-time dependency on rdma-core libraries (libibverbs,"