1/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are
5 * met:
6 *     * Redistributions of source code must retain the above copyright
7 *       notice, this list of conditions and the following disclaimer.
8 *     * Redistributions in binary form must reproduce the above
9 *       copyright notice, this list of conditions and the following
10 *       disclaimer in the documentation and/or other materials provided
11 *       with the distribution.
12 *     * Neither the name of The Linux Foundation nor the names of its
13 *       contributors may be used to endorse or promote products derived
14 *       from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <stdint.h>
30#include <stdlib.h>
31
32#include "sync.h"
33#include "wifi_hal.h"
34#include "common.h"
35
36#include "ring_buffer.h"
37#include "rb_wrapper.h"
38
39#define LOG_TAG  "WifiHAL"
40
41wifi_error rb_init(hal_info *info, struct rb_info *rb_info, int id,
42                   size_t size_of_buf, int num_bufs, char *name)
43{
44    rb_info->rb_ctx = ring_buffer_init(size_of_buf, num_bufs);
45    if (rb_info->rb_ctx == NULL) {
46        ALOGE("Failed to init ring buffer");
47        return WIFI_ERROR_OUT_OF_MEMORY;
48    }
49    strlcpy(rb_info->name, name, MAX_RB_NAME_SIZE);
50    rb_info->ctx = info;
51    rb_info->id = id;
52
53    /* Initialize last_push_time */
54    gettimeofday(&rb_info->last_push_time, NULL);
55    return WIFI_SUCCESS;
56}
57
58void rb_deinit(struct rb_info *rb_info)
59{
60    if (rb_info->rb_ctx) {
61        ring_buffer_deinit(rb_info->rb_ctx);
62        rb_info->rb_ctx = NULL;
63    }
64    rb_info->name[0] = '\0';
65}
66
67void get_rb_status(struct rb_info *rb_info, wifi_ring_buffer_status *rbs)
68{
69    struct rb_stats rb_stats;
70
71    strlcpy((char *)rbs->name, rb_info->name, MAX_RB_NAME_SIZE);
72    rbs->flags = rb_info->flags;
73    rbs->ring_id = rb_info->id;
74    rbs->verbose_level = rb_info->verbose_level;
75    rb_get_stats(rb_info->rb_ctx, &rb_stats);
76    rbs->ring_buffer_byte_size = rb_stats.max_num_bufs *
77                                 rb_stats.each_buf_size;
78    rbs->written_bytes = rb_stats.total_bytes_written;
79    rbs->read_bytes = rb_stats.total_bytes_read;
80    rbs->written_records = rb_info->written_records;
81}
82
83int is_rb_name_match(struct rb_info *rb_info, char *name)
84{
85    return (strncmp(rb_info->name, name, MAX_RB_NAME_SIZE) == 0);
86}
87
88wifi_error ring_buffer_write(struct rb_info *rb_info, u8 *buf, size_t length,
89                             int no_of_records, size_t record_length)
90{
91    enum rb_status status;
92
93    status = rb_write(rb_info->rb_ctx, buf, length, 0, record_length);
94    if ((status == RB_FULL) || (status == RB_RETRY)) {
95         push_out_rb_data(rb_info);
96         /* Try writing the data after reading it out */
97        status = rb_write(rb_info->rb_ctx, buf, length, 0, record_length);
98        if (status != RB_SUCCESS) {
99            ALOGE("Failed to rewrite %zu bytes to rb %s with error %d", length,
100                  rb_info->name, status);
101            return WIFI_ERROR_UNKNOWN;
102        }
103    } else if (status == RB_FAILURE) {
104        ALOGE("Failed to write %zu bytes to rb %s with error %d", length,
105              rb_info->name, status);
106        return WIFI_ERROR_UNKNOWN;
107    }
108
109    rb_info->written_records += no_of_records;
110    return WIFI_SUCCESS;
111}
112
113void push_out_rb_data(void *cb_ctx)
114{
115    struct rb_info *rb_info = (struct rb_info *)cb_ctx;
116    hal_info *info = (hal_info *)rb_info->ctx;
117    wifi_ring_buffer_status rbs;
118    wifi_ring_buffer_data_handler handler;
119
120    while (1) {
121        size_t length = 0;
122        u8 *buf;
123
124        buf = rb_get_read_buf(rb_info->rb_ctx, &length);
125        if (buf == NULL) {
126            break;
127        }
128        get_rb_status(rb_info, &rbs);
129        pthread_mutex_lock(&info->lh_lock);
130        handler.on_ring_buffer_data = info->on_ring_buffer_data;
131        pthread_mutex_unlock(&info->lh_lock);
132        if (handler.on_ring_buffer_data) {
133            handler.on_ring_buffer_data(rb_info->name, (char *)buf,
134                                        length, &rbs);
135        }
136        free(buf);
137    };
138    gettimeofday(&rb_info->last_push_time, NULL);
139}
140
141wifi_error rb_start_logging(struct rb_info *rb_info, u32 verbose_level,
142                            u32 flags, u32 max_interval_sec, u32 min_data_size)
143{
144    rb_info->verbose_level = verbose_level;
145    rb_info->flags = flags;
146    rb_info->max_interval_sec = max_interval_sec;
147
148    rb_config_threshold(rb_info->rb_ctx, min_data_size, push_out_rb_data, rb_info);
149    return WIFI_SUCCESS;
150}
151
152void rb_check_for_timeout(struct rb_info *rb_info, struct timeval *now)
153{
154    if (rb_info->max_interval_sec == 0) {
155        return;
156    }
157    if (now->tv_sec >=
158        (rb_info->last_push_time.tv_sec +
159         (__kernel_time_t)rb_info->max_interval_sec)) {
160        push_out_rb_data(rb_info);
161    }
162}
163