New upstream version 18.11-rc1

[deb_dpdk.git] / lib / librte_ethdev / ethdev_private.c

diff --git a/lib/librte_ethdev/ethdev_private.c b/lib/librte_ethdev/ethdev_private.c
new file mode 100644 (file)
index 0000000..162a502
--- /dev/null
+++ b/lib/librte_ethdev/ethdev_private.c
@@ -0,0 +1,121 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Gaëtan Rivet
+ */
+
+#include "rte_ethdev.h"
+#include "rte_ethdev_driver.h"
+#include "ethdev_private.h"
+
+uint16_t
+eth_dev_to_id(const struct rte_eth_dev *dev)
+{
+       if (dev == NULL)
+               return RTE_MAX_ETHPORTS;
+       return dev - rte_eth_devices;
+}
+
+struct rte_eth_dev *
+eth_find_device(const struct rte_eth_dev *start, rte_eth_cmp_t cmp,
+               const void *data)
+{
+       struct rte_eth_dev *edev;
+       ptrdiff_t idx;
+
+       /* Avoid Undefined Behaviour */
+       if (start != NULL &&
+           (start < &rte_eth_devices[0] ||
+            start > &rte_eth_devices[RTE_MAX_ETHPORTS]))
+               return NULL;
+       if (start != NULL)
+               idx = eth_dev_to_id(start) + 1;
+       else
+               idx = 0;
+       for (; idx < RTE_MAX_ETHPORTS; idx++) {
+               edev = &rte_eth_devices[idx];
+               if (cmp(edev, data) == 0)
+                       return edev;
+       }
+       return NULL;
+}
+
+int
+rte_eth_devargs_parse_list(char *str, rte_eth_devargs_callback_t callback,
+       void *data)
+{
+       char *str_start;
+       int state;
+       int result;
+
+       if (*str != '[')
+               /* Single element, not a list */
+               return callback(str, data);
+
+       /* Sanity check, then strip the brackets */
+       str_start = &str[strlen(str) - 1];
+       if (*str_start != ']') {
+               RTE_LOG(ERR, EAL, "(%s): List does not end with ']'\n", str);
+               return -EINVAL;
+       }
+       str++;
+       *str_start = '\0';
+
+       /* Process list elements */
+       state = 0;
+       while (1) {
+               if (state == 0) {
+                       if (*str == '\0')
+                               break;
+                       if (*str != ',') {
+                               str_start = str;
+                               state = 1;
+                       }
+               } else if (state == 1) {
+                       if (*str == ',' || *str == '\0') {
+                               if (str > str_start) {
+                                       /* Non-empty string fragment */
+                                       *str = '\0';
+                                       result = callback(str_start, data);
+                                       if (result < 0)
+                                               return result;
+                               }
+                               state = 0;
+                       }
+               }
+               str++;
+       }
+       return 0;
+}
+
+static int
+rte_eth_devargs_process_range(char *str, uint16_t *list, uint16_t *len_list,
+       const uint16_t max_list)
+{
+       uint16_t lo, hi, val;
+       int result;
+
+       result = sscanf(str, "%hu-%hu", &lo, &hi);
+       if (result == 1) {
+               if (*len_list >= max_list)
+                       return -ENOMEM;
+               list[(*len_list)++] = lo;
+       } else if (result == 2) {
+               if (lo >= hi || lo > RTE_MAX_ETHPORTS || hi > RTE_MAX_ETHPORTS)
+                       return -EINVAL;
+               for (val = lo; val <= hi; val++) {
+                       if (*len_list >= max_list)
+                               return -ENOMEM;
+                       list[(*len_list)++] = val;
+               }
+       } else
+               return -EINVAL;
+       return 0;
+}
+
+int
+rte_eth_devargs_parse_representor_ports(char *str, void *data)
+{
+       struct rte_eth_devargs *eth_da = data;
+
+       return rte_eth_devargs_process_range(str, eth_da->representor_ports,
+               &eth_da->nb_representor_ports, RTE_MAX_ETHPORTS);
+}