1 /* 2 * Copyright (c) 2018,2020-2021 The Linux Foundation. All rights reserved. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for 5 * any purpose with or without fee is hereby granted, provided that the 6 * above copyright notice and this permission notice appear in all 7 * copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 10 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 11 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 12 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 13 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 14 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 15 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 16 * PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include "htc_debug.h" 20 #include "htc_internal.h" 21 #include "htc_credit_history.h" 22 #include <qdf_lock.h> 23 #include <qdf_hang_event_notifier.h> 24 #include <qdf_notifier.h> 25 26 struct HTC_CREDIT_HISTORY { 27 enum htc_credit_exchange_type type; 28 uint64_t time; 29 uint32_t tx_credit; 30 uint32_t htc_tx_queue_depth; 31 }; 32 33 struct htc_hang_data_fixed_param { 34 uint16_t tlv_header; 35 struct HTC_CREDIT_HISTORY credit_hist; 36 } qdf_packed; 37 38 static qdf_spinlock_t g_htc_credit_lock; 39 static uint32_t g_htc_credit_history_idx; 40 static uint32_t g_htc_credit_history_length; 41 static 42 struct HTC_CREDIT_HISTORY htc_credit_history_buffer[HTC_CREDIT_HISTORY_MAX]; 43 44 #define NUM_HANG_CREDIT_HISTORY 1 45 46 #ifdef QCA_WIFI_EMULATION 47 #define HTC_EMULATION_DELAY_IN_MS 20 48 /** 49 * htc_add_delay(): Adds a delay in before proceeding, only for emulation 50 * 51 * Return: None 52 */ 53 static inline void htc_add_emulation_delay(void) 54 { 55 qdf_mdelay(HTC_EMULATION_DELAY_IN_MS); 56 } 57 #else 58 static inline void htc_add_emulation_delay(void) 59 { 60 } 61 #endif 62 63 void htc_credit_history_deinit(void) 64 { 65 qdf_minidump_remove(&htc_credit_history_buffer, 66 sizeof(htc_credit_history_buffer), "htc_credit"); 67 } 68 void htc_credit_history_init(void) 69 { 70 qdf_spinlock_create(&g_htc_credit_lock); 71 g_htc_credit_history_idx = 0; 72 g_htc_credit_history_length = 0; 73 qdf_minidump_log(&htc_credit_history_buffer, 74 sizeof(htc_credit_history_buffer), "htc_credit"); 75 } 76 77 /** 78 * htc_credit_record() - records tx que state & credit transactions 79 * @type: type of echange can be HTC_REQUEST_CREDIT 80 * or HTC_PROCESS_CREDIT_REPORT 81 * @tx_credits: current number of tx_credits 82 * @htc_tx_queue_depth: current hct tx queue depth 83 * 84 * This function records the credits and pending commands whenever a command is 85 * sent or credits are returned. Call this after the credits have been updated 86 * according to the transaction. Call this before dequeing commands. 87 * 88 * Consider making this function accept an HTC_ENDPOINT and find the current 89 * credits and queue depth itself. 90 * 91 */ 92 void htc_credit_record(enum htc_credit_exchange_type type, uint32_t tx_credit, 93 uint32_t htc_tx_queue_depth) 94 { 95 qdf_spin_lock_bh(&g_htc_credit_lock); 96 if (g_htc_credit_history_idx >= HTC_CREDIT_HISTORY_MAX) 97 g_htc_credit_history_idx = 0; 98 99 htc_credit_history_buffer[g_htc_credit_history_idx].type = type; 100 htc_credit_history_buffer[g_htc_credit_history_idx].time = 101 qdf_get_log_timestamp(); 102 htc_credit_history_buffer[g_htc_credit_history_idx].tx_credit = 103 tx_credit; 104 htc_credit_history_buffer[g_htc_credit_history_idx].htc_tx_queue_depth = 105 htc_tx_queue_depth; 106 107 g_htc_credit_history_idx++; 108 g_htc_credit_history_length++; 109 htc_add_emulation_delay(); 110 qdf_spin_unlock_bh(&g_htc_credit_lock); 111 } 112 113 void htc_print_credit_history(HTC_HANDLE htc, uint32_t count, 114 qdf_abstract_print *print, void *print_priv) 115 { 116 uint32_t idx; 117 118 print(print_priv, "HTC Credit History (count %u)", count); 119 qdf_spin_lock_bh(&g_htc_credit_lock); 120 121 if (count > HTC_CREDIT_HISTORY_MAX) 122 count = HTC_CREDIT_HISTORY_MAX; 123 if (count > g_htc_credit_history_length) 124 count = g_htc_credit_history_length; 125 126 /* subtract count from index, and wrap if necessary */ 127 idx = HTC_CREDIT_HISTORY_MAX + g_htc_credit_history_idx - count; 128 idx %= HTC_CREDIT_HISTORY_MAX; 129 130 print(print_priv, 131 "Time (seconds) Type Credits Queue Depth"); 132 while (count) { 133 struct HTC_CREDIT_HISTORY *hist = 134 &htc_credit_history_buffer[idx]; 135 uint64_t secs, usecs; 136 137 qdf_log_timestamp_to_secs(hist->time, &secs, &usecs); 138 print(print_priv, "% 8lld.%06lld %-25s %-7.d %d", 139 secs, 140 usecs, 141 htc_credit_exchange_type_str(hist->type), 142 hist->tx_credit, 143 hist->htc_tx_queue_depth); 144 145 --count; 146 ++idx; 147 if (idx >= HTC_CREDIT_HISTORY_MAX) 148 idx = 0; 149 } 150 151 qdf_spin_unlock_bh(&g_htc_credit_lock); 152 } 153 154 #ifdef WLAN_HANG_EVENT 155 void htc_log_hang_credit_history(struct notifier_block *block, void *data) 156 { 157 qdf_notif_block *notif_block = qdf_container_of(block, qdf_notif_block, 158 notif_block); 159 struct qdf_notifer_data *htc_hang_data = data; 160 uint32_t count = NUM_HANG_CREDIT_HISTORY, idx, total_len; 161 HTC_HANDLE htc; 162 struct htc_hang_data_fixed_param *cmd; 163 uint8_t *htc_buf_ptr; 164 165 htc = notif_block->priv_data; 166 167 if (!htc) 168 return; 169 170 if (!htc_hang_data) 171 return; 172 173 total_len = sizeof(struct htc_hang_data_fixed_param); 174 qdf_spin_lock_bh(&g_htc_credit_lock); 175 176 if (count > HTC_CREDIT_HISTORY_MAX) 177 count = HTC_CREDIT_HISTORY_MAX; 178 if (count > g_htc_credit_history_length) 179 count = g_htc_credit_history_length; 180 181 idx = HTC_CREDIT_HISTORY_MAX + g_htc_credit_history_idx - count; 182 idx %= HTC_CREDIT_HISTORY_MAX; 183 184 qdf_spin_unlock_bh(&g_htc_credit_lock); 185 186 while (count) { 187 struct HTC_CREDIT_HISTORY *hist = 188 &htc_credit_history_buffer[idx]; 189 htc_buf_ptr = htc_hang_data->hang_data + htc_hang_data->offset; 190 cmd = (struct htc_hang_data_fixed_param *)htc_buf_ptr; 191 192 if (htc_hang_data->offset + total_len > QDF_WLAN_HANG_FW_OFFSET) 193 return; 194 195 QDF_HANG_EVT_SET_HDR(&cmd->tlv_header, 196 HANG_EVT_TAG_HTC_CREDIT_HIST, 197 QDF_HANG_GET_STRUCT_TLVLEN(struct htc_hang_data_fixed_param)); 198 qdf_mem_copy(&cmd->credit_hist, hist, sizeof(*hist)); 199 --count; 200 ++idx; 201 if (idx >= HTC_CREDIT_HISTORY_MAX) 202 idx = 0; 203 htc_hang_data->offset += total_len; 204 } 205 } 206 #endif 207