1 /* 2 * Copyright (c) 2018 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 24 struct HTC_CREDIT_HISTORY { 25 enum htc_credit_exchange_type type; 26 uint64_t time; 27 uint32_t tx_credit; 28 uint32_t htc_tx_queue_depth; 29 }; 30 31 static qdf_spinlock_t g_htc_credit_lock; 32 static uint32_t g_htc_credit_history_idx; 33 static uint32_t g_htc_credit_history_length; 34 static 35 struct HTC_CREDIT_HISTORY htc_credit_history_buffer[HTC_CREDIT_HISTORY_MAX]; 36 37 38 #ifdef QCA_WIFI_NAPIER_EMULATION 39 #define HTC_EMULATION_DELAY_IN_MS 20 40 /** 41 * htc_add_delay(): Adds a delay in before proceeding, only for emulation 42 * 43 * Return: None 44 */ 45 static inline void htc_add_emulation_delay(void) 46 { 47 qdf_mdelay(HTC_EMULATION_DELAY_IN_MS); 48 } 49 #else 50 static inline void htc_add_emulation_delay(void) 51 { 52 } 53 #endif 54 55 void htc_credit_history_init(void) 56 { 57 qdf_spinlock_create(&g_htc_credit_lock); 58 g_htc_credit_history_idx = 0; 59 g_htc_credit_history_length = 0; 60 } 61 62 /** 63 * htc_credit_record() - records tx que state & credit transactions 64 * @type: type of echange can be HTC_REQUEST_CREDIT 65 * or HTC_PROCESS_CREDIT_REPORT 66 * @tx_credits: current number of tx_credits 67 * @htc_tx_queue_depth: current hct tx queue depth 68 * 69 * This function records the credits and pending commands whenever a command is 70 * sent or credits are returned. Call this after the credits have been updated 71 * according to the transaction. Call this before dequeing commands. 72 * 73 * Consider making this function accept an HTC_ENDPOINT and find the current 74 * credits and queue depth itself. 75 * 76 */ 77 void htc_credit_record(enum htc_credit_exchange_type type, uint32_t tx_credit, 78 uint32_t htc_tx_queue_depth) 79 { 80 qdf_spin_lock_bh(&g_htc_credit_lock); 81 if (g_htc_credit_history_idx >= HTC_CREDIT_HISTORY_MAX) 82 g_htc_credit_history_idx = 0; 83 84 htc_credit_history_buffer[g_htc_credit_history_idx].type = type; 85 htc_credit_history_buffer[g_htc_credit_history_idx].time = 86 qdf_get_log_timestamp(); 87 htc_credit_history_buffer[g_htc_credit_history_idx].tx_credit = 88 tx_credit; 89 htc_credit_history_buffer[g_htc_credit_history_idx].htc_tx_queue_depth = 90 htc_tx_queue_depth; 91 92 g_htc_credit_history_idx++; 93 g_htc_credit_history_length++; 94 htc_add_emulation_delay(); 95 qdf_spin_unlock_bh(&g_htc_credit_lock); 96 } 97 98 void htc_print_credit_history(HTC_HANDLE htc, uint32_t count, 99 qdf_abstract_print *print, void *print_priv) 100 { 101 uint32_t idx; 102 103 print(print_priv, "HTC Credit History (count %u)", count); 104 qdf_spin_lock_bh(&g_htc_credit_lock); 105 106 if (count > HTC_CREDIT_HISTORY_MAX) 107 count = HTC_CREDIT_HISTORY_MAX; 108 if (count > g_htc_credit_history_length) 109 count = g_htc_credit_history_length; 110 111 /* subtract count from index, and wrap if necessary */ 112 idx = HTC_CREDIT_HISTORY_MAX + g_htc_credit_history_idx - count; 113 idx %= HTC_CREDIT_HISTORY_MAX; 114 115 print(print_priv, 116 "Time (seconds) Type Credits Queue Depth"); 117 while (count) { 118 struct HTC_CREDIT_HISTORY *hist = 119 &htc_credit_history_buffer[idx]; 120 uint64_t secs, usecs; 121 122 qdf_log_timestamp_to_secs(hist->time, &secs, &usecs); 123 print(print_priv, "% 8lld.%06lld %-25s %-7.d %d", 124 secs, 125 usecs, 126 htc_credit_exchange_type_str(hist->type), 127 hist->tx_credit, 128 hist->htc_tx_queue_depth); 129 130 --count; 131 ++idx; 132 if (idx >= HTC_CREDIT_HISTORY_MAX) 133 idx = 0; 134 } 135 136 qdf_spin_unlock_bh(&g_htc_credit_lock); 137 } 138