1 /* 2 * Copyright (c) 2012-2021 The Linux Foundation. All rights reserved. 3 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for 6 * any purpose with or without fee is hereby granted, provided that the 7 * above copyright notice and this permission notice appear in all 8 * copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 11 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 12 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 13 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 14 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 15 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 16 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <wlan_dfs_public_struct.h> 21 #include <reg_services_public_struct.h> 22 23 /* Channel width definitions */ 24 /* 20MHz channel width */ 25 #define DFS_CH_WIDTH_20MHZ 0 26 27 /* 40MHz channel width */ 28 #define DFS_CH_WIDTH_40MHZ 1 29 30 /* 80MHz channel width */ 31 #define DFS_CH_WIDTH_80MHZ 2 32 33 /* 160MHz channel width */ 34 #define DFS_CH_WIDTH_160MHZ 3 35 36 /* 80+80 non-contiguous */ 37 #define DFS_CH_WIDTH_80P80MHZ 4 38 39 /* 5MHz channel width */ 40 #define DFS_CH_WIDTH_5MHZ 5 41 42 /* 10MHz channel width */ 43 #define DFS_CH_WIDTH_10MHZ 6 44 45 #define DFS_CH_WIDTH_320MHZ 7 46 /* Invalid channel width */ 47 #define DFS_CH_WIDTH_INVALID 8 48 49 /* Max channel width */ 50 #define DFS_CH_WIDTH_MAX 9 51 52 /* Next 5GHz channel number */ 53 #define DFS_80_NUM_SUB_CHANNEL 4 54 55 /* Next 5GHz channel freq offset */ 56 #define DFS_80_NUM_SUB_CHANNEL_FREQ 20 57 58 /* Next 5GHz channel number */ 59 #define DFS_NEXT_5GHZ_CHANNEL 4 60 61 /* Next 5GHz channel number */ 62 #define DFS_NEXT_5GHZ_CHANNEL_FREQ_OFFSET 20 63 64 /* Number of 20MHz channels in bitmap */ 65 #define DFS_MAX_NUM_160_SUBCHAN 8 66 67 #define DFS_MAX_NUM_240_SUBCHAN 12 68 /* Frequency difference between 80+80 MHz */ 69 #define DFS_80P80M_FREQ_DIFF 40 70 71 #ifdef CONFIG_BAND_6GHZ 72 /* Number of 80MHz channels in 5GHz and 6GHz band */ 73 #define DFS_MAX_80MHZ_BANDS (7 + 14) 74 #else 75 /* Number of 80MHz channels in 5GHz band */ 76 #define DFS_MAX_80MHZ_BANDS 7 77 #endif 78 79 /* Start channel and center channel diff in 80Mhz */ 80 #define DFS_80MHZ_START_CENTER_CH_DIFF 6 81 82 /* Start channel and center channel freq diff in 80Mhz */ 83 #define DFS_80MHZ_START_CENTER_CH_FREQ_DIFF 30 84 85 /* Bitmap mask for 80MHz */ 86 #define DFS_80MHZ_MASK 0x0F 87 88 /* Bitmap mask for 40MHz lower */ 89 #define DFS_40MHZ_MASK_L 0x03 90 91 /* Bitmap mask for 40MHz higher */ 92 #define DFS_40MHZ_MASK_H 0x0C 93 94 /* Adjacent weather radar channel frequency */ 95 #define DFS_ADJACENT_WEATHER_RADAR_CHANNEL 5580 96 97 /* Adjacent weather radar channel number */ 98 #define DFS_ADJACENT_WEATHER_RADAR_CHANNEL_NUM 116 99 100 /* Max 2.4 GHz channel number */ 101 #define DFS_MAX_24GHZ_CHANNEL 14 102 103 /* Max 2.4 GHz channel frequency */ 104 #define DFS_MAX_24GHZ_CHANNEL_FREQ 2484 105 106 /* Adjacent weather radar channel frequency */ 107 #define DFS_ADJACENT_WEATHER_RADAR_CHANNEL_FREQ 5580 108 /* Max valid channel number */ 109 #define MAX_CHANNEL_NUM 184 110 111 #ifdef WLAN_ENABLE_CHNL_MATRIX_RESTRICTION 112 #define DFS_TX_LEAKAGE_THRES 310 113 #define DFS_TX_LEAKAGE_MAX 1000 114 #define DFS_TX_LEAKAGE_MIN 200 115 116 /* 117 * This define is used to block additional channels 118 * based on the new data gathered on auto platforms 119 * and to differentiate the leakage data among different 120 * platforms. 121 */ 122 123 #define DFS_TX_LEAKAGE_AUTO_MIN 210 124 #endif 125 126 #define DFS_IS_CHANNEL_WEATHER_RADAR(_f) (((_f) >= 5600) && ((_f) <= 5650)) 127 128 #ifdef CONFIG_CHAN_FREQ_API 129 #define DFS_IS_CHAN_JAPAN_INDOOR_FREQ(_ch)(((_ch) >= 5180) && ((_ch) <= 5320)) 130 #define DFS_IS_CHAN_JAPAN_OUTDOOR_FREQ(_ch)(((_ch) >= 5500) && ((_ch) <= 5720)) 131 #define DFS_IS_CHAN_JAPAN_W53_FREQ(_ch) (((_ch) >= 5260) && ((_ch) <= 5320)) 132 /* 133 * Spur or leakage transmissions is observed in Spruce HW in 134 * frequencies from 5260MHz to 5320MHz when one of the following 135 * conditions is true, 136 * i) The AP is transmitting in 52/56/60/64 in 80MHz mode and then the AP 137 * moves to the adjacent channel 36/44/48 in 80MHz mode and starts 138 * transmitting. 139 * ii) The AP is transmitting in 36/44/48/52/56/60/64 in 160MHz mode and then 140 * the AP moves to the adjacent channel 36/44/48 in 80MHz mode and starts 141 * transmitting. 142 * iii) The AP is transmitting in 52/56/60/64 in 20MHz or 40MHz mode and 143 * the AP moves to the adjacent channels 40/44/48 in 20MHz mode or 144 * 36/40/44/48 in 40MHz mode and starts transmitting. 145 * Hence, center frequencies from 5260MHz to 5320MHz in Spruce HW are called 146 * Spruce Spur 80MHz Frequencies and, center frequencies from 5180MHz and 147 * 5320MHz except 5200MHz are called Spruce Spur 160MHz Frequencies. 148 */ 149 /* Channels 52/56/60/64 in 80MHz */ 150 #define DFS_IS_CHAN_SPRUCE_SPUR_FREQ_80MHZ(_ch) \ 151 (((_ch) >= 5260) && ((_ch) <= 5320)) 152 /* 36/44/48/52/56/60/64 in 160MHz mode */ 153 #define DFS_IS_CHAN_SPRUCE_SPUR_FREQ_160MHZ(_ch) \ 154 (((_ch) >= 5180) && ((_ch) <= 5320) && ((_ch) != 5200)) 155 /* Avoid channels 36/44/48 */ 156 #define DFS_IS_SPRUCE_SPUR_AVOID_FREQS(_ch) \ 157 (((_ch) >= 5180) && ((_ch) <= 5240) && ((_ch) != 5200)) 158 159 /* Avoid channels 36/40/44/48 in HT40 mode and 40/44/48 in HT20 mode. */ 160 #define DFS_IS_CHAN_SPRUCE_SPUR_FREQ_20_40_MHZ(_ch) \ 161 (((_ch) >= 5200) && ((_ch) <= 5240)) 162 #endif 163 164 /** 165 * struct chan_bonding_info - for holding channel bonding bitmap 166 * @chan_map: channel map 167 * @rsvd: reserved 168 * @start_chan: start channel 169 * @start_chan_freq: start channel frequency in MHZ. 170 */ 171 struct chan_bonding_info { 172 uint8_t chan_map:4; 173 uint8_t rsvd:4; 174 uint8_t start_chan; 175 uint16_t start_chan_freq; 176 }; 177 178 /** 179 * struct chan_bonding_bitmap - bitmap structure which represent 180 * all 5GHZ channels. 181 * @chan_bonding_set: channel bonding bitmap 182 */ 183 struct chan_bonding_bitmap { 184 struct chan_bonding_info chan_bonding_set[DFS_MAX_80MHZ_BANDS]; 185 }; 186 187 #ifdef WLAN_ENABLE_CHNL_MATRIX_RESTRICTION 188 /** 189 * struct dfs_tx_leak_info - DFS leakage info 190 * @leak_chan: leak channel. 191 * @leak_lvl: tx leakage lvl. 192 */ 193 struct dfs_tx_leak_info { 194 uint8_t leak_chan; 195 uint16_t leak_chan_freq; 196 uint32_t leak_lvl; 197 }; 198 199 /** 200 * struct dfs_matrix_tx_leak_info - DFS leakage matrix info for dfs channel. 201 * @channel: channel to switch from 202 * @chan_matrix DFS leakage matrix info for given dfs channel. 203 */ 204 struct dfs_matrix_tx_leak_info { 205 uint8_t channel; 206 uint16_t channel_freq; 207 struct dfs_tx_leak_info chan_matrix[CHAN_ENUM_5720 - 208 CHAN_ENUM_5180 + 1]; 209 }; 210 #endif 211 212 /** 213 * dfs_mark_leaking_chan_for_freq() - to mark channel leaking in to nol 214 * @dfs: dfs handler. 215 * @ch_width: channel width 216 * @temp_chan_lst_sz: the target channel list size. 217 * @temp_freq_lst: the target frequency channel list 218 * 219 * This function removes the channels from temp channel list that 220 * (if selected as target channel) will cause leakage in one of 221 * the NOL channels 222 * 223 * Return: QDF_STATUS 224 */ 225 #ifdef CONFIG_CHAN_FREQ_API 226 QDF_STATUS dfs_mark_leaking_chan_for_freq(struct wlan_dfs *dfs, 227 enum phy_ch_width ch_width, 228 uint8_t temp_chan_lst_sz, 229 uint16_t *temp_freq_lst); 230 #endif 231 232 /** 233 * dfs_prepare_random_channel_for_freq() - This function picks a random channel 234 * from the list of available channels. 235 * @dfs: dfs handler. 236 * @chan_list: channel list. 237 * @ch_count: Number of channels in given list. 238 * @flags: DFS_RANDOM_CH_FLAG_* 239 * @chan_wd: input channel width, used same variable to return new ch width. 240 * @cur_chan: current channel. 241 * @dfs_region: DFS region. 242 * @acs_info: acs channel range information. 243 * 244 * Function used to find random channel selection from a given list. 245 * First this function removes channels based on flags and then uses final 246 * list to find channel based on requested bandwidth, if requested bandwidth 247 * not available, it chooses next lower bandwidth and try. 248 * 249 * Return: channel frequency, else zero. 250 */ 251 #ifdef CONFIG_CHAN_FREQ_API 252 uint16_t dfs_prepare_random_channel_for_freq(struct wlan_dfs *dfs, 253 struct dfs_channel *ch_list, 254 uint32_t chan_count, 255 uint32_t flags, 256 struct ch_params *chan_params, 257 uint8_t dfs_region, 258 struct dfs_acs_info *acs_info); 259 #endif 260