Rachit Kankane | 1bc1149 | 2018-01-24 18:48:17 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018 The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| 5 | * |
| 6 | * |
| 7 | * Permission to use, copy, modify, and/or distribute this software for |
| 8 | * any purpose with or without fee is hereby granted, provided that the |
| 9 | * above copyright notice and this permission notice appear in all |
| 10 | * copies. |
| 11 | * |
| 12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 13 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 14 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 15 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 16 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 17 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 18 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 19 | * PERFORMANCE OF THIS SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * This file was originally distributed by Qualcomm Atheros, Inc. |
| 24 | * under proprietary terms before Copyright ownership was assigned |
| 25 | * to the Linux Foundation. |
| 26 | */ |
| 27 | |
| 28 | #include "htc_debug.h" |
| 29 | #include "htc_internal.h" |
| 30 | #include "htc_credit_history.h" |
| 31 | #include <qdf_lock.h> |
| 32 | |
| 33 | struct HTC_CREDIT_HISTORY { |
| 34 | enum htc_credit_exchange_type type; |
| 35 | uint64_t time; |
| 36 | uint32_t tx_credit; |
| 37 | uint32_t htc_tx_queue_depth; |
| 38 | }; |
| 39 | |
| 40 | static qdf_spinlock_t g_htc_credit_lock; |
| 41 | static uint32_t g_htc_credit_history_idx; |
| 42 | static uint32_t g_htc_credit_history_length; |
| 43 | static |
| 44 | struct HTC_CREDIT_HISTORY htc_credit_history_buffer[HTC_CREDIT_HISTORY_MAX]; |
| 45 | |
| 46 | |
| 47 | #ifdef QCA_WIFI_NAPIER_EMULATION |
| 48 | #define HTC_EMULATION_DELAY_IN_MS 20 |
| 49 | /** |
| 50 | * htc_add_delay(): Adds a delay in before proceeding, only for emulation |
| 51 | * |
| 52 | * Return: None |
| 53 | */ |
| 54 | static inline void htc_add_emulation_delay(void) |
| 55 | { |
| 56 | qdf_mdelay(HTC_EMULATION_DELAY_IN_MS); |
| 57 | } |
| 58 | #else |
| 59 | static inline void htc_add_emulation_delay(void) |
| 60 | { |
| 61 | } |
| 62 | #endif |
| 63 | |
| 64 | void htc_credit_history_init(void) |
| 65 | { |
| 66 | qdf_spinlock_create(&g_htc_credit_lock); |
| 67 | g_htc_credit_history_idx = 0; |
| 68 | g_htc_credit_history_length = 0; |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * htc_credit_record() - records tx que state & credit transactions |
| 73 | * @type: type of echange can be HTC_REQUEST_CREDIT |
| 74 | * or HTC_PROCESS_CREDIT_REPORT |
| 75 | * @tx_credits: current number of tx_credits |
| 76 | * @htc_tx_queue_depth: current hct tx queue depth |
| 77 | * |
| 78 | * This function records the credits and pending commands whenever a command is |
| 79 | * sent or credits are returned. Call this after the credits have been updated |
| 80 | * according to the transaction. Call this before dequeing commands. |
| 81 | * |
| 82 | * Consider making this function accept an HTC_ENDPOINT and find the current |
| 83 | * credits and queue depth itself. |
| 84 | * |
| 85 | */ |
| 86 | void htc_credit_record(enum htc_credit_exchange_type type, uint32_t tx_credit, |
| 87 | uint32_t htc_tx_queue_depth) |
| 88 | { |
| 89 | qdf_spin_lock_bh(&g_htc_credit_lock); |
| 90 | if (g_htc_credit_history_idx >= HTC_CREDIT_HISTORY_MAX) |
| 91 | g_htc_credit_history_idx = 0; |
| 92 | |
| 93 | htc_credit_history_buffer[g_htc_credit_history_idx].type = type; |
| 94 | htc_credit_history_buffer[g_htc_credit_history_idx].time = |
| 95 | qdf_get_log_timestamp(); |
| 96 | htc_credit_history_buffer[g_htc_credit_history_idx].tx_credit = |
| 97 | tx_credit; |
| 98 | htc_credit_history_buffer[g_htc_credit_history_idx].htc_tx_queue_depth = |
| 99 | htc_tx_queue_depth; |
| 100 | |
| 101 | g_htc_credit_history_idx++; |
| 102 | g_htc_credit_history_length++; |
| 103 | htc_add_emulation_delay(); |
| 104 | qdf_spin_unlock_bh(&g_htc_credit_lock); |
| 105 | } |
| 106 | |
| 107 | void htc_print_credit_history(HTC_HANDLE htc, uint32_t count, |
| 108 | qdf_abstract_print *print, void *print_priv) |
| 109 | { |
| 110 | uint32_t idx; |
| 111 | |
| 112 | print(print_priv, "HTC Credit History (count %u)", count); |
| 113 | qdf_spin_lock_bh(&g_htc_credit_lock); |
| 114 | |
| 115 | if (count > HTC_CREDIT_HISTORY_MAX) |
| 116 | count = HTC_CREDIT_HISTORY_MAX; |
| 117 | if (count > g_htc_credit_history_length) |
| 118 | count = g_htc_credit_history_length; |
| 119 | |
| 120 | /* subtract count from index, and wrap if necessary */ |
| 121 | idx = HTC_CREDIT_HISTORY_MAX + g_htc_credit_history_idx - count; |
| 122 | idx %= HTC_CREDIT_HISTORY_MAX; |
| 123 | |
| 124 | print(print_priv, |
| 125 | "Time (seconds) Type Credits Queue Depth"); |
| 126 | while (count) { |
| 127 | struct HTC_CREDIT_HISTORY *hist = |
| 128 | &htc_credit_history_buffer[idx]; |
| 129 | uint64_t secs, usecs; |
| 130 | |
| 131 | qdf_log_timestamp_to_secs(hist->time, &secs, &usecs); |
| 132 | print(print_priv, "% 8lld.%06lld %-25s %-7.d %d", |
| 133 | secs, |
| 134 | usecs, |
| 135 | htc_credit_exchange_type_str(hist->type), |
| 136 | hist->tx_credit, |
| 137 | hist->htc_tx_queue_depth); |
| 138 | |
| 139 | --count; |
| 140 | ++idx; |
| 141 | if (idx >= HTC_CREDIT_HISTORY_MAX) |
| 142 | idx = 0; |
| 143 | } |
| 144 | |
| 145 | qdf_spin_unlock_bh(&g_htc_credit_lock); |
| 146 | } |