-/**
- * Read from sysfs entry.
- *
- * @param[in] priv
- * Pointer to private structure.
- * @param[in] entry
- * Entry name relative to sysfs path.
- * @param[out] buf
- * Data output buffer.
- * @param size
- * Buffer size.
- *
- * @return
- * Number of bytes read on success, negative errno value otherwise and
- * rte_errno is set.
- */
-static int
-mlx4_sysfs_read(const struct priv *priv, const char *entry,
- char *buf, size_t size)
-{
- char ifname[IF_NAMESIZE];
- FILE *file;
- int ret;
-
- ret = mlx4_get_ifname(priv, &ifname);
- if (ret)
- return ret;
-
- MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
- ifname, entry);
-
- file = fopen(path, "rb");
- if (file == NULL) {
- rte_errno = errno;
- return -rte_errno;
- }
- ret = fread(buf, 1, size, file);
- if ((size_t)ret < size && ferror(file)) {
- rte_errno = EIO;
- ret = -rte_errno;
- } else {
- ret = size;
- }
- fclose(file);
- return ret;
-}
-
-/**
- * Write to sysfs entry.
- *
- * @param[in] priv
- * Pointer to private structure.
- * @param[in] entry
- * Entry name relative to sysfs path.
- * @param[in] buf
- * Data buffer.
- * @param size
- * Buffer size.
- *
- * @return
- * Number of bytes written on success, negative errno value otherwise and
- * rte_errno is set.
- */
-static int
-mlx4_sysfs_write(const struct priv *priv, const char *entry,
- char *buf, size_t size)
-{
- char ifname[IF_NAMESIZE];
- FILE *file;
- int ret;
-
- ret = mlx4_get_ifname(priv, &ifname);
- if (ret)
- return ret;
-
- MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
- ifname, entry);
-
- file = fopen(path, "wb");
- if (file == NULL) {
- rte_errno = errno;
- return -rte_errno;
- }
- ret = fwrite(buf, 1, size, file);
- if ((size_t)ret < size || ferror(file)) {
- rte_errno = EIO;
- ret = -rte_errno;
- } else {
- ret = size;
- }
- fclose(file);
- return ret;
-}
-
-/**
- * Get unsigned long sysfs property.
- *
- * @param priv
- * Pointer to private structure.
- * @param[in] name
- * Entry name relative to sysfs path.
- * @param[out] value
- * Value output buffer.
- *
- * @return
- * 0 on success, negative errno value otherwise and rte_errno is set.
- */
-static int
-mlx4_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
-{
- int ret;
- unsigned long value_ret;
- char value_str[32];
-
- ret = mlx4_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
- if (ret < 0) {
- DEBUG("cannot read %s value from sysfs: %s",
- name, strerror(rte_errno));
- return ret;
- }
- value_str[ret] = '\0';
- errno = 0;
- value_ret = strtoul(value_str, NULL, 0);
- if (errno) {
- rte_errno = errno;
- DEBUG("invalid %s value `%s': %s", name, value_str,
- strerror(rte_errno));
- return -rte_errno;
- }
- *value = value_ret;
- return 0;
-}
-
-/**
- * Set unsigned long sysfs property.
- *
- * @param priv
- * Pointer to private structure.
- * @param[in] name
- * Entry name relative to sysfs path.
- * @param value
- * Value to set.
- *
- * @return
- * 0 on success, negative errno value otherwise and rte_errno is set.
- */
-static int
-mlx4_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
-{
- int ret;
- MKSTR(value_str, "%lu", value);
-
- ret = mlx4_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
- if (ret < 0) {
- DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
- name, value_str, value, strerror(rte_errno));
- return ret;
- }
- return 0;
-}
-