1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2018 MediaTek Inc. 4 * 5 */ 6 7 #ifndef __MTK_CMDQ_H__ 8 #define __MTK_CMDQ_H__ 9 10 #include <linux/mailbox_client.h> 11 #include <linux/mailbox/mtk-cmdq-mailbox.h> 12 #include <linux/timer.h> 13 14 #define CMDQ_ADDR_HIGH(addr) ((u32)(((addr) >> 16) & GENMASK(31, 0))) 15 #define CMDQ_ADDR_LOW(addr) ((u16)(addr) | BIT(1)) 16 17 struct cmdq_pkt; 18 19 struct cmdq_client_reg { 20 u8 subsys; 21 u16 offset; 22 u16 size; 23 }; 24 25 struct cmdq_client { 26 struct mbox_client client; 27 struct mbox_chan *chan; 28 }; 29 30 /** 31 * cmdq_dev_get_client_reg() - parse cmdq client reg from the device 32 * node of CMDQ client 33 * @dev: device of CMDQ mailbox client 34 * @client_reg: CMDQ client reg pointer 35 * @idx: the index of desired reg 36 * 37 * Return: 0 for success; else the error code is returned 38 * 39 * Help CMDQ client parsing the cmdq client reg 40 * from the device node of CMDQ client. 41 */ 42 int cmdq_dev_get_client_reg(struct device *dev, 43 struct cmdq_client_reg *client_reg, int idx); 44 45 /** 46 * cmdq_mbox_create() - create CMDQ mailbox client and channel 47 * @dev: device of CMDQ mailbox client 48 * @index: index of CMDQ mailbox channel 49 * 50 * Return: CMDQ mailbox client pointer 51 */ 52 struct cmdq_client *cmdq_mbox_create(struct device *dev, int index); 53 54 /** 55 * cmdq_mbox_destroy() - destroy CMDQ mailbox client and channel 56 * @client: the CMDQ mailbox client 57 */ 58 void cmdq_mbox_destroy(struct cmdq_client *client); 59 60 /** 61 * cmdq_pkt_create() - create a CMDQ packet 62 * @client: the CMDQ mailbox client 63 * @size: required CMDQ buffer size 64 * 65 * Return: CMDQ packet pointer 66 */ 67 struct cmdq_pkt *cmdq_pkt_create(struct cmdq_client *client, size_t size); 68 69 /** 70 * cmdq_pkt_destroy() - destroy the CMDQ packet 71 * @pkt: the CMDQ packet 72 */ 73 void cmdq_pkt_destroy(struct cmdq_pkt *pkt); 74 75 /** 76 * cmdq_pkt_write() - append write command to the CMDQ packet 77 * @pkt: the CMDQ packet 78 * @subsys: the CMDQ sub system code 79 * @offset: register offset from CMDQ sub system 80 * @value: the specified target register value 81 * 82 * Return: 0 for success; else the error code is returned 83 */ 84 int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value); 85 86 /** 87 * cmdq_pkt_write_mask() - append write command with mask to the CMDQ packet 88 * @pkt: the CMDQ packet 89 * @subsys: the CMDQ sub system code 90 * @offset: register offset from CMDQ sub system 91 * @value: the specified target register value 92 * @mask: the specified target register mask 93 * 94 * Return: 0 for success; else the error code is returned 95 */ 96 int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, 97 u16 offset, u32 value, u32 mask); 98 99 /* 100 * cmdq_pkt_read_s() - append read_s command to the CMDQ packet 101 * @pkt: the CMDQ packet 102 * @high_addr_reg_idx: internal register ID which contains high address of pa 103 * @addr_low: low address of pa 104 * @reg_idx: the CMDQ internal register ID to cache read data 105 * 106 * Return: 0 for success; else the error code is returned 107 */ 108 int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low, 109 u16 reg_idx); 110 111 /** 112 * cmdq_pkt_write_s() - append write_s command to the CMDQ packet 113 * @pkt: the CMDQ packet 114 * @high_addr_reg_idx: internal register ID which contains high address of pa 115 * @addr_low: low address of pa 116 * @src_reg_idx: the CMDQ internal register ID which cache source value 117 * 118 * Return: 0 for success; else the error code is returned 119 * 120 * Support write value to physical address without subsys. Use CMDQ_ADDR_HIGH() 121 * to get high address and call cmdq_pkt_assign() to assign value into internal 122 * reg. Also use CMDQ_ADDR_LOW() to get low address for addr_low parameter when 123 * call to this function. 124 */ 125 int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, 126 u16 addr_low, u16 src_reg_idx); 127 128 /** 129 * cmdq_pkt_write_s_mask() - append write_s with mask command to the CMDQ packet 130 * @pkt: the CMDQ packet 131 * @high_addr_reg_idx: internal register ID which contains high address of pa 132 * @addr_low: low address of pa 133 * @src_reg_idx: the CMDQ internal register ID which cache source value 134 * @mask: the specified target address mask, use U32_MAX if no need 135 * 136 * Return: 0 for success; else the error code is returned 137 * 138 * Support write value to physical address without subsys. Use CMDQ_ADDR_HIGH() 139 * to get high address and call cmdq_pkt_assign() to assign value into internal 140 * reg. Also use CMDQ_ADDR_LOW() to get low address for addr_low parameter when 141 * call to this function. 142 */ 143 int cmdq_pkt_write_s_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, 144 u16 addr_low, u16 src_reg_idx, u32 mask); 145 146 /** 147 * cmdq_pkt_write_s_value() - append write_s command to the CMDQ packet which 148 * write value to a physical address 149 * @pkt: the CMDQ packet 150 * @high_addr_reg_idx: internal register ID which contains high address of pa 151 * @addr_low: low address of pa 152 * @value: the specified target value 153 * 154 * Return: 0 for success; else the error code is returned 155 */ 156 int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx, 157 u16 addr_low, u32 value); 158 159 /** 160 * cmdq_pkt_write_s_mask_value() - append write_s command with mask to the CMDQ 161 * packet which write value to a physical 162 * address 163 * @pkt: the CMDQ packet 164 * @high_addr_reg_idx: internal register ID which contains high address of pa 165 * @addr_low: low address of pa 166 * @value: the specified target value 167 * @mask: the specified target mask 168 * 169 * Return: 0 for success; else the error code is returned 170 */ 171 int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx, 172 u16 addr_low, u32 value, u32 mask); 173 174 /** 175 * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet 176 * @pkt: the CMDQ packet 177 * @event: the desired event type to wait 178 * @clear: clear event or not after event arrive 179 * 180 * Return: 0 for success; else the error code is returned 181 */ 182 int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear); 183 184 /** 185 * cmdq_pkt_clear_event() - append clear event command to the CMDQ packet 186 * @pkt: the CMDQ packet 187 * @event: the desired event to be cleared 188 * 189 * Return: 0 for success; else the error code is returned 190 */ 191 int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event); 192 193 /** 194 * cmdq_pkt_set_event() - append set event command to the CMDQ packet 195 * @pkt: the CMDQ packet 196 * @event: the desired event to be set 197 * 198 * Return: 0 for success; else the error code is returned 199 */ 200 int cmdq_pkt_set_event(struct cmdq_pkt *pkt, u16 event); 201 202 /** 203 * cmdq_pkt_poll() - Append polling command to the CMDQ packet, ask GCE to 204 * execute an instruction that wait for a specified 205 * hardware register to check for the value w/o mask. 206 * All GCE hardware threads will be blocked by this 207 * instruction. 208 * @pkt: the CMDQ packet 209 * @subsys: the CMDQ sub system code 210 * @offset: register offset from CMDQ sub system 211 * @value: the specified target register value 212 * 213 * Return: 0 for success; else the error code is returned 214 */ 215 int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys, 216 u16 offset, u32 value); 217 218 /** 219 * cmdq_pkt_poll_mask() - Append polling command to the CMDQ packet, ask GCE to 220 * execute an instruction that wait for a specified 221 * hardware register to check for the value w/ mask. 222 * All GCE hardware threads will be blocked by this 223 * instruction. 224 * @pkt: the CMDQ packet 225 * @subsys: the CMDQ sub system code 226 * @offset: register offset from CMDQ sub system 227 * @value: the specified target register value 228 * @mask: the specified target register mask 229 * 230 * Return: 0 for success; else the error code is returned 231 */ 232 int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys, 233 u16 offset, u32 value, u32 mask); 234 235 /** 236 * cmdq_pkt_assign() - Append logic assign command to the CMDQ packet, ask GCE 237 * to execute an instruction that set a constant value into 238 * internal register and use as value, mask or address in 239 * read/write instruction. 240 * @pkt: the CMDQ packet 241 * @reg_idx: the CMDQ internal register ID 242 * @value: the specified value 243 * 244 * Return: 0 for success; else the error code is returned 245 */ 246 int cmdq_pkt_assign(struct cmdq_pkt *pkt, u16 reg_idx, u32 value); 247 248 /** 249 * cmdq_pkt_jump() - Append jump command to the CMDQ packet, ask GCE 250 * to execute an instruction that change current thread PC to 251 * a physical address which should contains more instruction. 252 * @pkt: the CMDQ packet 253 * @addr: physical address of target instruction buffer 254 * 255 * Return: 0 for success; else the error code is returned 256 */ 257 int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr); 258 259 /** 260 * cmdq_pkt_finalize() - Append EOC and jump command to pkt. 261 * @pkt: the CMDQ packet 262 * 263 * Return: 0 for success; else the error code is returned 264 */ 265 int cmdq_pkt_finalize(struct cmdq_pkt *pkt); 266 267 /** 268 * cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ 269 * packet and call back at the end of done packet 270 * @pkt: the CMDQ packet 271 * 272 * Return: 0 for success; else the error code is returned 273 * 274 * Trigger CMDQ to asynchronously execute the CMDQ packet and call back 275 * at the end of done packet. Note that this is an ASYNC function. When the 276 * function returned, it may or may not be finished. 277 */ 278 int cmdq_pkt_flush_async(struct cmdq_pkt *pkt); 279 280 #endif /* __MTK_CMDQ_H__ */ 281