quantenna/qtnfmac/util.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 /* Copyright (c) 2015-2016 Quantenna Communications. All rights reserved. */
0003
0004 #include "util.h"
0005 #include "qtn_hw_ids.h"
0006
0007 void qtnf_sta_list_init(struct qtnf_sta_list *list)
0008 {
0009     if (unlikely(!list))
0010         return;
0011
0012     INIT_LIST_HEAD(&list->head);
0013     atomic_set(&list->size, 0);
0014 }
0015
0016 struct qtnf_sta_node *qtnf_sta_list_lookup(struct qtnf_sta_list *list,
0017                        const u8 *mac)
0018 {
0019     struct qtnf_sta_node *node;
0020
0021     if (unlikely(!mac))
0022         return NULL;
0023
0024     list_for_each_entry(node, &list->head, list) {
0025         if (ether_addr_equal(node->mac_addr, mac))
0026             return node;
0027     }
0028
0029     return NULL;
0030 }
0031
0032 struct qtnf_sta_node *qtnf_sta_list_lookup_index(struct qtnf_sta_list *list,
0033                          size_t index)
0034 {
0035     struct qtnf_sta_node *node;
0036
0037     if (qtnf_sta_list_size(list) <= index)
0038         return NULL;
0039
0040     list_for_each_entry(node, &list->head, list) {
0041         if (index-- == 0)
0042             return node;
0043     }
0044
0045     return NULL;
0046 }
0047
0048 struct qtnf_sta_node *qtnf_sta_list_add(struct qtnf_vif *vif,
0049                     const u8 *mac)
0050 {
0051     struct qtnf_sta_list *list = &vif->sta_list;
0052     struct qtnf_sta_node *node;
0053
0054     if (unlikely(!mac))
0055         return NULL;
0056
0057     node = qtnf_sta_list_lookup(list, mac);
0058
0059     if (node)
0060         goto done;
0061
0062     node = kzalloc(sizeof(*node), GFP_KERNEL);
0063     if (unlikely(!node))
0064         goto done;
0065
0066     ether_addr_copy(node->mac_addr, mac);
0067     list_add_tail(&node->list, &list->head);
0068     atomic_inc(&list->size);
0069     ++vif->generation;
0070
0071 done:
0072     return node;
0073 }
0074
0075 bool qtnf_sta_list_del(struct qtnf_vif *vif, const u8 *mac)
0076 {
0077     struct qtnf_sta_list *list = &vif->sta_list;
0078     struct qtnf_sta_node *node;
0079     bool ret = false;
0080
0081     node = qtnf_sta_list_lookup(list, mac);
0082
0083     if (node) {
0084         list_del(&node->list);
0085         atomic_dec(&list->size);
0086         kfree(node);
0087         ++vif->generation;
0088         ret = true;
0089     }
0090
0091     return ret;
0092 }
0093
0094 void qtnf_sta_list_free(struct qtnf_sta_list *list)
0095 {
0096     struct qtnf_sta_node *node, *tmp;
0097
0098     atomic_set(&list->size, 0);
0099
0100     list_for_each_entry_safe(node, tmp, &list->head, list) {
0101         list_del(&node->list);
0102         kfree(node);
0103     }
0104
0105     INIT_LIST_HEAD(&list->head);
0106 }
0107
0108 const char *qtnf_chipid_to_string(unsigned long chip_id)
0109 {
0110     switch (chip_id) {
0111     case QTN_CHIP_ID_TOPAZ:
0112         return "Topaz";
0113     case QTN_CHIP_ID_PEARL:
0114         return "Pearl revA";
0115     case QTN_CHIP_ID_PEARL_B:
0116         return "Pearl revB";
0117     case QTN_CHIP_ID_PEARL_C:
0118         return "Pearl revC";
0119     default:
0120         return "unknown";
0121     }
0122 }
0123 EXPORT_SYMBOL_GPL(qtnf_chipid_to_string);