1 /* 2 * Copyright (c) 2018,2020 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_NAPIER_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_init(void) 64 { 65 qdf_spinlock_create(&g_htc_credit_lock); 66 g_htc_credit_history_idx = 0; 67 g_htc_credit_history_length = 0; 68 } 69 70 /** 71 * htc_credit_record() - records tx que state & credit transactions 72 * @type: type of echange can be HTC_REQUEST_CREDIT 73 * or HTC_PROCESS_CREDIT_REPORT 74 * @tx_credits: current number of tx_credits 75 * @htc_tx_queue_depth: current hct tx queue depth 76 * 77 * This function records the credits and pending commands whenever a command is 78 * sent or credits are returned. Call this after the credits have been updated 79 * according to the transaction. Call this before dequeing commands. 80 * 81 * Consider making this function accept an HTC_ENDPOINT and find the current 82 * credits and queue depth itself. 83 * 84 */ 85 void htc_credit_record(enum htc_credit_exchange_type type, uint32_t tx_credit, 86 uint32_t htc_tx_queue_depth) 87 { 88 qdf_spin_lock_bh(&g_htc_credit_lock); 89 if (g_htc_credit_history_idx >= HTC_CREDIT_HISTORY_MAX) 90 g_htc_credit_history_idx = 0; 91 92 htc_credit_history_buffer[g_htc_credit_history_idx].type = type; 93 htc_credit_history_buffer[g_htc_credit_history_idx].time = 94 qdf_get_log_timestamp(); 95 htc_credit_history_buffer[g_htc_credit_history_idx].tx_credit = 96 tx_credit; 97 htc_credit_history_buffer[g_htc_credit_history_idx].htc_tx_queue_depth = 98 htc_tx_queue_depth; 99 100 g_htc_credit_history_idx++; 101 g_htc_credit_history_length++; 102 htc_add_emulation_delay(); 103 qdf_spin_unlock_bh(&g_htc_credit_lock); 104 } 105 106 void htc_print_credit_history(HTC_HANDLE htc, uint32_t count, 107 qdf_abstract_print *print, void *print_priv) 108 { 109 uint32_t idx; 110 111 print(print_priv, "HTC Credit History (count %u)", count); 112 qdf_spin_lock_bh(&g_htc_credit_lock); 113 114 if (count > HTC_CREDIT_HISTORY_MAX) 115 count = HTC_CREDIT_HISTORY_MAX; 116 if (count > g_htc_credit_history_length) 117 count = g_htc_credit_history_length; 118 119 /* subtract count from index, and wrap if necessary */ 120 idx = HTC_CREDIT_HISTORY_MAX + g_htc_credit_history_idx - count; 121 idx %= HTC_CREDIT_HISTORY_MAX; 122 123 print(print_priv, 124 "Time (seconds) Type Credits Queue Depth"); 125 while (count) { 126 struct HTC_CREDIT_HISTORY *hist = 127 &htc_credit_history_buffer[idx]; 128 uint64_t secs, usecs; 129 130 qdf_log_timestamp_to_secs(hist->time, &secs, &usecs); 131 print(print_priv, "% 8lld.%06lld %-25s %-7.d %d", 132 secs, 133 usecs, 134 htc_credit_exchange_type_str(hist->type), 135 hist->tx_credit, 136 hist->htc_tx_queue_depth); 137 138 --count; 139 ++idx; 140 if (idx >= HTC_CREDIT_HISTORY_MAX) 141 idx = 0; 142 } 143 144 qdf_spin_unlock_bh(&g_htc_credit_lock); 145 } 146 147 #ifdef WLAN_HANG_EVENT 148 void htc_log_hang_credit_history(struct notifier_block *block, void *data) 149 { 150 qdf_notif_block *notif_block = qdf_container_of(block, qdf_notif_block, 151 notif_block); 152 struct qdf_notifer_data *htc_hang_data = data; 153 uint32_t count = NUM_HANG_CREDIT_HISTORY, idx, total_len; 154 HTC_HANDLE htc; 155 struct htc_hang_data_fixed_param *cmd; 156 uint8_t *htc_buf_ptr; 157 158 htc = notif_block->priv_data; 159 160 if (!htc) 161 return; 162 163 if (!htc_hang_data) 164 return; 165 166 total_len = sizeof(struct htc_hang_data_fixed_param); 167 qdf_spin_lock_bh(&g_htc_credit_lock); 168 169 if (count > HTC_CREDIT_HISTORY_MAX) 170 count = HTC_CREDIT_HISTORY_MAX; 171 if (count > g_htc_credit_history_length) 172 count = g_htc_credit_history_length; 173 174 idx = HTC_CREDIT_HISTORY_MAX + g_htc_credit_history_idx - count; 175 idx %= HTC_CREDIT_HISTORY_MAX; 176 177 qdf_spin_unlock_bh(&g_htc_credit_lock); 178 179 while (count) { 180 struct HTC_CREDIT_HISTORY *hist = 181 &htc_credit_history_buffer[idx]; 182 htc_buf_ptr = htc_hang_data->hang_data + htc_hang_data->offset; 183 cmd = (struct htc_hang_data_fixed_param *)htc_buf_ptr; 184 185 if (htc_hang_data->offset + total_len > QDF_WLAN_HANG_FW_OFFSET) 186 return; 187 188 QDF_HANG_EVT_SET_HDR(&cmd->tlv_header, 189 HANG_EVT_TAG_HTC_CREDIT_HIST, 190 QDF_HANG_GET_STRUCT_TLVLEN(struct htc_hang_data_fixed_param)); 191 qdf_mem_copy(&cmd->credit_hist, hist, sizeof(*hist)); 192 --count; 193 ++idx; 194 if (idx >= HTC_CREDIT_HISTORY_MAX) 195 idx = 0; 196 htc_hang_data->offset += total_len; 197 } 198 } 199 #endif 200