1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ 2 /* 3 * Copyright (C) 2005-2014, 2018-2021, 2023 Intel Corporation 4 * Copyright (C) 2015-2017 Intel Deutschland GmbH 5 */ 6 #ifndef __iwl_fh_h__ 7 #define __iwl_fh_h__ 8 9 #include <linux/types.h> 10 #include <linux/bitfield.h> 11 12 #include "iwl-trans.h" 13 14 /****************************/ 15 /* Flow Handler Definitions */ 16 /****************************/ 17 18 /** 19 * This I/O area is directly read/writable by driver (e.g. Linux uses writel()) 20 * Addresses are offsets from device's PCI hardware base address. 21 */ 22 #define FH_MEM_LOWER_BOUND (0x1000) 23 #define FH_MEM_UPPER_BOUND (0x2000) 24 #define FH_MEM_LOWER_BOUND_GEN2 (0xa06000) 25 #define FH_MEM_UPPER_BOUND_GEN2 (0xa08000) 26 27 /** 28 * Keep-Warm (KW) buffer base address. 29 * 30 * Driver must allocate a 4KByte buffer that is for keeping the 31 * host DRAM powered on (via dummy accesses to DRAM) to maintain low-latency 32 * DRAM access when doing Txing or Rxing. The dummy accesses prevent host 33 * from going into a power-savings mode that would cause higher DRAM latency, 34 * and possible data over/under-runs, before all Tx/Rx is complete. 35 * 36 * Driver loads FH_KW_MEM_ADDR_REG with the physical address (bits 35:4) 37 * of the buffer, which must be 4K aligned. Once this is set up, the device 38 * automatically invokes keep-warm accesses when normal accesses might not 39 * be sufficient to maintain fast DRAM response. 40 * 41 * Bit fields: 42 * 31-0: Keep-warm buffer physical base address [35:4], must be 4K aligned 43 */ 44 #define FH_KW_MEM_ADDR_REG (FH_MEM_LOWER_BOUND + 0x97C) 45 46 47 /** 48 * TFD Circular Buffers Base (CBBC) addresses 49 * 50 * Device has 16 base pointer registers, one for each of 16 host-DRAM-resident 51 * circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs) 52 * (see struct iwl_tfd_frame). These 16 pointer registers are offset by 0x04 53 * bytes from one another. Each TFD circular buffer in DRAM must be 256-byte 54 * aligned (address bits 0-7 must be 0). 55 * Later devices have 20 (5000 series) or 30 (higher) queues, but the registers 56 * for them are in different places. 57 * 58 * Bit fields in each pointer register: 59 * 27-0: TFD CB physical base address [35:8], must be 256-byte aligned 60 */ 61 #define FH_MEM_CBBC_0_15_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0) 62 #define FH_MEM_CBBC_0_15_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xA10) 63 #define FH_MEM_CBBC_16_19_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBF0) 64 #define FH_MEM_CBBC_16_19_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00) 65 #define FH_MEM_CBBC_20_31_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xB20) 66 #define FH_MEM_CBBC_20_31_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xB80) 67 /* 22000 TFD table address, 64 bit */ 68 #define TFH_TFDQ_CBB_TABLE (0x1C00) 69 70 /* Find TFD CB base pointer for given queue */ 71 static inline unsigned int FH_MEM_CBBC_QUEUE(struct iwl_trans *trans, 72 unsigned int chnl) 73 { 74 if (trans->trans_cfg->gen2) { 75 WARN_ON_ONCE(chnl >= 64); 76 return TFH_TFDQ_CBB_TABLE + 8 * chnl; 77 } 78 if (chnl < 16) 79 return FH_MEM_CBBC_0_15_LOWER_BOUND + 4 * chnl; 80 if (chnl < 20) 81 return FH_MEM_CBBC_16_19_LOWER_BOUND + 4 * (chnl - 16); 82 WARN_ON_ONCE(chnl >= 32); 83 return FH_MEM_CBBC_20_31_LOWER_BOUND + 4 * (chnl - 20); 84 } 85 86 /* 22000 configuration registers */ 87 88 /* 89 * TFH Configuration register. 90 * 91 * BIT fields: 92 * 93 * Bits 3:0: 94 * Define the maximum number of pending read requests. 95 * Maximum configuration value allowed is 0xC 96 * Bits 9:8: 97 * Define the maximum transfer size. (64 / 128 / 256) 98 * Bit 10: 99 * When bit is set and transfer size is set to 128B, the TFH will enable 100 * reading chunks of more than 64B only if the read address is aligned to 128B. 101 * In case of DRAM read address which is not aligned to 128B, the TFH will 102 * enable transfer size which doesn't cross 64B DRAM address boundary. 103 */ 104 #define TFH_TRANSFER_MODE (0x1F40) 105 #define TFH_TRANSFER_MAX_PENDING_REQ 0xc 106 #define TFH_CHUNK_SIZE_128 BIT(8) 107 #define TFH_CHUNK_SPLIT_MODE BIT(10) 108 /* 109 * Defines the offset address in dwords referring from the beginning of the 110 * Tx CMD which will be updated in DRAM. 111 * Note that the TFH offset address for Tx CMD update is always referring to 112 * the start of the TFD first TB. 113 * In case of a DRAM Tx CMD update the TFH will update PN and Key ID 114 */ 115 #define TFH_TXCMD_UPDATE_CFG (0x1F48) 116 /* 117 * Controls TX DMA operation 118 * 119 * BIT fields: 120 * 121 * Bits 31:30: Enable the SRAM DMA channel. 122 * Turning on bit 31 will kick the SRAM2DRAM DMA. 123 * Note that the sram2dram may be enabled only after configuring the DRAM and 124 * SRAM addresses registers and the byte count register. 125 * Bits 25:24: Defines the interrupt target upon dram2sram transfer done. When 126 * set to 1 - interrupt is sent to the driver 127 * Bit 0: Indicates the snoop configuration 128 */ 129 #define TFH_SRV_DMA_CHNL0_CTRL (0x1F60) 130 #define TFH_SRV_DMA_SNOOP BIT(0) 131 #define TFH_SRV_DMA_TO_DRIVER BIT(24) 132 #define TFH_SRV_DMA_START BIT(31) 133 134 /* Defines the DMA SRAM write start address to transfer a data block */ 135 #define TFH_SRV_DMA_CHNL0_SRAM_ADDR (0x1F64) 136 137 /* Defines the 64bits DRAM start address to read the DMA data block from */ 138 #define TFH_SRV_DMA_CHNL0_DRAM_ADDR (0x1F68) 139 140 /* 141 * Defines the number of bytes to transfer from DRAM to SRAM. 142 * Note that this register may be configured with non-dword aligned size. 143 */ 144 #define TFH_SRV_DMA_CHNL0_BC (0x1F70) 145 146 /** 147 * Rx SRAM Control and Status Registers (RSCSR) 148 * 149 * These registers provide handshake between driver and device for the Rx queue 150 * (this queue handles *all* command responses, notifications, Rx data, etc. 151 * sent from uCode to host driver). Unlike Tx, there is only one Rx 152 * queue, and only one Rx DMA/FIFO channel. Also unlike Tx, which can 153 * concatenate up to 20 DRAM buffers to form a Tx frame, each Receive Buffer 154 * Descriptor (RBD) points to only one Rx Buffer (RB); there is a 1:1 155 * mapping between RBDs and RBs. 156 * 157 * Driver must allocate host DRAM memory for the following, and set the 158 * physical address of each into device registers: 159 * 160 * 1) Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256 161 * entries (although any power of 2, up to 4096, is selectable by driver). 162 * Each entry (1 dword) points to a receive buffer (RB) of consistent size 163 * (typically 4K, although 8K or 16K are also selectable by driver). 164 * Driver sets up RB size and number of RBDs in the CB via Rx config 165 * register FH_MEM_RCSR_CHNL0_CONFIG_REG. 166 * 167 * Bit fields within one RBD: 168 * 27-0: Receive Buffer physical address bits [35:8], 256-byte aligned 169 * 170 * Driver sets physical address [35:8] of base of RBD circular buffer 171 * into FH_RSCSR_CHNL0_RBDCB_BASE_REG [27:0]. 172 * 173 * 2) Rx status buffer, 8 bytes, in which uCode indicates which Rx Buffers 174 * (RBs) have been filled, via a "write pointer", actually the index of 175 * the RB's corresponding RBD within the circular buffer. Driver sets 176 * physical address [35:4] into FH_RSCSR_CHNL0_STTS_WPTR_REG [31:0]. 177 * 178 * Bit fields in lower dword of Rx status buffer (upper dword not used 179 * by driver: 180 * 31-12: Not used by driver 181 * 11- 0: Index of last filled Rx buffer descriptor 182 * (device writes, driver reads this value) 183 * 184 * As the driver prepares Receive Buffers (RBs) for device to fill, driver must 185 * enter pointers to these RBs into contiguous RBD circular buffer entries, 186 * and update the device's "write" index register, 187 * FH_RSCSR_CHNL0_RBDCB_WPTR_REG. 188 * 189 * This "write" index corresponds to the *next* RBD that the driver will make 190 * available, i.e. one RBD past the tail of the ready-to-fill RBDs within 191 * the circular buffer. This value should initially be 0 (before preparing any 192 * RBs), should be 8 after preparing the first 8 RBs (for example), and must 193 * wrap back to 0 at the end of the circular buffer (but don't wrap before 194 * "read" index has advanced past 1! See below). 195 * NOTE: DEVICE EXPECTS THE WRITE INDEX TO BE INCREMENTED IN MULTIPLES OF 8. 196 * 197 * As the device fills RBs (referenced from contiguous RBDs within the circular 198 * buffer), it updates the Rx status buffer in host DRAM, 2) described above, 199 * to tell the driver the index of the latest filled RBD. The driver must 200 * read this "read" index from DRAM after receiving an Rx interrupt from device 201 * 202 * The driver must also internally keep track of a third index, which is the 203 * next RBD to process. When receiving an Rx interrupt, driver should process 204 * all filled but unprocessed RBs up to, but not including, the RB 205 * corresponding to the "read" index. For example, if "read" index becomes "1", 206 * driver may process the RB pointed to by RBD 0. Depending on volume of 207 * traffic, there may be many RBs to process. 208 * 209 * If read index == write index, device thinks there is no room to put new data. 210 * Due to this, the maximum number of filled RBs is 255, instead of 256. To 211 * be safe, make sure that there is a gap of at least 2 RBDs between "write" 212 * and "read" indexes; that is, make sure that there are no more than 254 213 * buffers waiting to be filled. 214 */ 215 #define FH_MEM_RSCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBC0) 216 #define FH_MEM_RSCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00) 217 #define FH_MEM_RSCSR_CHNL0 (FH_MEM_RSCSR_LOWER_BOUND) 218 219 /** 220 * Physical base address of 8-byte Rx Status buffer. 221 * Bit fields: 222 * 31-0: Rx status buffer physical base address [35:4], must 16-byte aligned. 223 */ 224 #define FH_RSCSR_CHNL0_STTS_WPTR_REG (FH_MEM_RSCSR_CHNL0) 225 226 /** 227 * Physical base address of Rx Buffer Descriptor Circular Buffer. 228 * Bit fields: 229 * 27-0: RBD CD physical base address [35:8], must be 256-byte aligned. 230 */ 231 #define FH_RSCSR_CHNL0_RBDCB_BASE_REG (FH_MEM_RSCSR_CHNL0 + 0x004) 232 233 /** 234 * Rx write pointer (index, really!). 235 * Bit fields: 236 * 11-0: Index of driver's most recent prepared-to-be-filled RBD, + 1. 237 * NOTE: For 256-entry circular buffer, use only bits [7:0]. 238 */ 239 #define FH_RSCSR_CHNL0_RBDCB_WPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x008) 240 #define FH_RSCSR_CHNL0_WPTR (FH_RSCSR_CHNL0_RBDCB_WPTR_REG) 241 242 #define FW_RSCSR_CHNL0_RXDCB_RDPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x00c) 243 #define FH_RSCSR_CHNL0_RDPTR FW_RSCSR_CHNL0_RXDCB_RDPTR_REG 244 245 /** 246 * Rx Config/Status Registers (RCSR) 247 * Rx Config Reg for channel 0 (only channel used) 248 * 249 * Driver must initialize FH_MEM_RCSR_CHNL0_CONFIG_REG as follows for 250 * normal operation (see bit fields). 251 * 252 * Clearing FH_MEM_RCSR_CHNL0_CONFIG_REG to 0 turns off Rx DMA. 253 * Driver should poll FH_MEM_RSSR_RX_STATUS_REG for 254 * FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (bit 24) before continuing. 255 * 256 * Bit fields: 257 * 31-30: Rx DMA channel enable: '00' off/pause, '01' pause at end of frame, 258 * '10' operate normally 259 * 29-24: reserved 260 * 23-20: # RBDs in circular buffer = 2^value; use "8" for 256 RBDs (normal), 261 * min "5" for 32 RBDs, max "12" for 4096 RBDs. 262 * 19-18: reserved 263 * 17-16: size of each receive buffer; '00' 4K (normal), '01' 8K, 264 * '10' 12K, '11' 16K. 265 * 15-14: reserved 266 * 13-12: IRQ destination; '00' none, '01' host driver (normal operation) 267 * 11- 4: timeout for closing Rx buffer and interrupting host (units 32 usec) 268 * typical value 0x10 (about 1/2 msec) 269 * 3- 0: reserved 270 */ 271 #define FH_MEM_RCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC00) 272 #define FH_MEM_RCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xCC0) 273 #define FH_MEM_RCSR_CHNL0 (FH_MEM_RCSR_LOWER_BOUND) 274 275 #define FH_MEM_RCSR_CHNL0_CONFIG_REG (FH_MEM_RCSR_CHNL0) 276 #define FH_MEM_RCSR_CHNL0_RBDCB_WPTR (FH_MEM_RCSR_CHNL0 + 0x8) 277 #define FH_MEM_RCSR_CHNL0_FLUSH_RB_REQ (FH_MEM_RCSR_CHNL0 + 0x10) 278 279 #define FH_RCSR_CHNL0_RX_CONFIG_RB_TIMEOUT_MSK (0x00000FF0) /* bits 4-11 */ 280 #define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_MSK (0x00001000) /* bits 12 */ 281 #define FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK (0x00008000) /* bit 15 */ 282 #define FH_RCSR_CHNL0_RX_CONFIG_RB_SIZE_MSK (0x00030000) /* bits 16-17 */ 283 #define FH_RCSR_CHNL0_RX_CONFIG_RBDBC_SIZE_MSK (0x00F00000) /* bits 20-23 */ 284 #define FH_RCSR_CHNL0_RX_CONFIG_DMA_CHNL_EN_MSK (0xC0000000) /* bits 30-31*/ 285 286 #define FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS (20) 287 #define FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS (4) 288 #define RX_RB_TIMEOUT (0x11) 289 290 #define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_VAL (0x00000000) 291 #define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_EOF_VAL (0x40000000) 292 #define FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL (0x80000000) 293 294 #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K (0x00000000) 295 #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K (0x00010000) 296 #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K (0x00020000) 297 #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_16K (0x00030000) 298 299 #define FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY (0x00000004) 300 #define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_NO_INT_VAL (0x00000000) 301 #define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL (0x00001000) 302 303 /** 304 * Rx Shared Status Registers (RSSR) 305 * 306 * After stopping Rx DMA channel (writing 0 to 307 * FH_MEM_RCSR_CHNL0_CONFIG_REG), driver must poll 308 * FH_MEM_RSSR_RX_STATUS_REG until Rx channel is idle. 309 * 310 * Bit fields: 311 * 24: 1 = Channel 0 is idle 312 * 313 * FH_MEM_RSSR_SHARED_CTRL_REG and FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV 314 * contain default values that should not be altered by the driver. 315 */ 316 #define FH_MEM_RSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC40) 317 #define FH_MEM_RSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xD00) 318 319 #define FH_MEM_RSSR_SHARED_CTRL_REG (FH_MEM_RSSR_LOWER_BOUND) 320 #define FH_MEM_RSSR_RX_STATUS_REG (FH_MEM_RSSR_LOWER_BOUND + 0x004) 321 #define FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV\ 322 (FH_MEM_RSSR_LOWER_BOUND + 0x008) 323 324 #define FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (0x01000000) 325 326 #define FH_MEM_TFDIB_REG1_ADDR_BITSHIFT 28 327 #define FH_MEM_TB_MAX_LENGTH (0x00020000) 328 329 /* 9000 rx series registers */ 330 331 #define RFH_Q0_FRBDCB_BA_LSB 0xA08000 /* 64 bit address */ 332 #define RFH_Q_FRBDCB_BA_LSB(q) (RFH_Q0_FRBDCB_BA_LSB + (q) * 8) 333 /* Write index table */ 334 #define RFH_Q0_FRBDCB_WIDX 0xA08080 335 #define RFH_Q_FRBDCB_WIDX(q) (RFH_Q0_FRBDCB_WIDX + (q) * 4) 336 /* Write index table - shadow registers */ 337 #define RFH_Q0_FRBDCB_WIDX_TRG 0x1C80 338 #define RFH_Q_FRBDCB_WIDX_TRG(q) (RFH_Q0_FRBDCB_WIDX_TRG + (q) * 4) 339 /* Read index table */ 340 #define RFH_Q0_FRBDCB_RIDX 0xA080C0 341 #define RFH_Q_FRBDCB_RIDX(q) (RFH_Q0_FRBDCB_RIDX + (q) * 4) 342 /* Used list table */ 343 #define RFH_Q0_URBDCB_BA_LSB 0xA08100 /* 64 bit address */ 344 #define RFH_Q_URBDCB_BA_LSB(q) (RFH_Q0_URBDCB_BA_LSB + (q) * 8) 345 /* Write index table */ 346 #define RFH_Q0_URBDCB_WIDX 0xA08180 347 #define RFH_Q_URBDCB_WIDX(q) (RFH_Q0_URBDCB_WIDX + (q) * 4) 348 #define RFH_Q0_URBDCB_VAID 0xA081C0 349 #define RFH_Q_URBDCB_VAID(q) (RFH_Q0_URBDCB_VAID + (q) * 4) 350 /* stts */ 351 #define RFH_Q0_URBD_STTS_WPTR_LSB 0xA08200 /*64 bits address */ 352 #define RFH_Q_URBD_STTS_WPTR_LSB(q) (RFH_Q0_URBD_STTS_WPTR_LSB + (q) * 8) 353 354 #define RFH_Q0_ORB_WPTR_LSB 0xA08280 355 #define RFH_Q_ORB_WPTR_LSB(q) (RFH_Q0_ORB_WPTR_LSB + (q) * 8) 356 #define RFH_RBDBUF_RBD0_LSB 0xA08300 357 #define RFH_RBDBUF_RBD_LSB(q) (RFH_RBDBUF_RBD0_LSB + (q) * 8) 358 359 /** 360 * RFH Status Register 361 * 362 * Bit fields: 363 * 364 * Bit 29: RBD_FETCH_IDLE 365 * This status flag is set by the RFH when there is no active RBD fetch from 366 * DRAM. 367 * Once the RFH RBD controller starts fetching (or when there is a pending 368 * RBD read response from DRAM), this flag is immediately turned off. 369 * 370 * Bit 30: SRAM_DMA_IDLE 371 * This status flag is set by the RFH when there is no active transaction from 372 * SRAM to DRAM. 373 * Once the SRAM to DRAM DMA is active, this flag is immediately turned off. 374 * 375 * Bit 31: RXF_DMA_IDLE 376 * This status flag is set by the RFH when there is no active transaction from 377 * RXF to DRAM. 378 * Once the RXF-to-DRAM DMA is active, this flag is immediately turned off. 379 */ 380 #define RFH_GEN_STATUS 0xA09808 381 #define RFH_GEN_STATUS_GEN3 0xA07824 382 #define RBD_FETCH_IDLE BIT(29) 383 #define SRAM_DMA_IDLE BIT(30) 384 #define RXF_DMA_IDLE BIT(31) 385 386 /* DMA configuration */ 387 #define RFH_RXF_DMA_CFG 0xA09820 388 #define RFH_RXF_DMA_CFG_GEN3 0xA07880 389 /* RB size */ 390 #define RFH_RXF_DMA_RB_SIZE_MASK (0x000F0000) /* bits 16-19 */ 391 #define RFH_RXF_DMA_RB_SIZE_POS 16 392 #define RFH_RXF_DMA_RB_SIZE_1K (0x1 << RFH_RXF_DMA_RB_SIZE_POS) 393 #define RFH_RXF_DMA_RB_SIZE_2K (0x2 << RFH_RXF_DMA_RB_SIZE_POS) 394 #define RFH_RXF_DMA_RB_SIZE_4K (0x4 << RFH_RXF_DMA_RB_SIZE_POS) 395 #define RFH_RXF_DMA_RB_SIZE_8K (0x8 << RFH_RXF_DMA_RB_SIZE_POS) 396 #define RFH_RXF_DMA_RB_SIZE_12K (0x9 << RFH_RXF_DMA_RB_SIZE_POS) 397 #define RFH_RXF_DMA_RB_SIZE_16K (0xA << RFH_RXF_DMA_RB_SIZE_POS) 398 #define RFH_RXF_DMA_RB_SIZE_20K (0xB << RFH_RXF_DMA_RB_SIZE_POS) 399 #define RFH_RXF_DMA_RB_SIZE_24K (0xC << RFH_RXF_DMA_RB_SIZE_POS) 400 #define RFH_RXF_DMA_RB_SIZE_28K (0xD << RFH_RXF_DMA_RB_SIZE_POS) 401 #define RFH_RXF_DMA_RB_SIZE_32K (0xE << RFH_RXF_DMA_RB_SIZE_POS) 402 /* RB Circular Buffer size:defines the table sizes in RBD units */ 403 #define RFH_RXF_DMA_RBDCB_SIZE_MASK (0x00F00000) /* bits 20-23 */ 404 #define RFH_RXF_DMA_RBDCB_SIZE_POS 20 405 #define RFH_RXF_DMA_RBDCB_SIZE_8 (0x3 << RFH_RXF_DMA_RBDCB_SIZE_POS) 406 #define RFH_RXF_DMA_RBDCB_SIZE_16 (0x4 << RFH_RXF_DMA_RBDCB_SIZE_POS) 407 #define RFH_RXF_DMA_RBDCB_SIZE_32 (0x5 << RFH_RXF_DMA_RBDCB_SIZE_POS) 408 #define RFH_RXF_DMA_RBDCB_SIZE_64 (0x7 << RFH_RXF_DMA_RBDCB_SIZE_POS) 409 #define RFH_RXF_DMA_RBDCB_SIZE_128 (0x7 << RFH_RXF_DMA_RBDCB_SIZE_POS) 410 #define RFH_RXF_DMA_RBDCB_SIZE_256 (0x8 << RFH_RXF_DMA_RBDCB_SIZE_POS) 411 #define RFH_RXF_DMA_RBDCB_SIZE_512 (0x9 << RFH_RXF_DMA_RBDCB_SIZE_POS) 412 #define RFH_RXF_DMA_RBDCB_SIZE_1024 (0xA << RFH_RXF_DMA_RBDCB_SIZE_POS) 413 #define RFH_RXF_DMA_RBDCB_SIZE_2048 (0xB << RFH_RXF_DMA_RBDCB_SIZE_POS) 414 #define RFH_RXF_DMA_MIN_RB_SIZE_MASK (0x03000000) /* bit 24-25 */ 415 #define RFH_RXF_DMA_MIN_RB_SIZE_POS 24 416 #define RFH_RXF_DMA_MIN_RB_4_8 (3 << RFH_RXF_DMA_MIN_RB_SIZE_POS) 417 #define RFH_RXF_DMA_DROP_TOO_LARGE_MASK (0x04000000) /* bit 26 */ 418 #define RFH_RXF_DMA_SINGLE_FRAME_MASK (0x20000000) /* bit 29 */ 419 #define RFH_DMA_EN_MASK (0xC0000000) /* bits 30-31*/ 420 #define RFH_DMA_EN_ENABLE_VAL BIT(31) 421 422 #define RFH_RXF_RXQ_ACTIVE 0xA0980C 423 424 #define RFH_GEN_CFG 0xA09800 425 #define RFH_GEN_CFG_SERVICE_DMA_SNOOP BIT(0) 426 #define RFH_GEN_CFG_RFH_DMA_SNOOP BIT(1) 427 #define RFH_GEN_CFG_RB_CHUNK_SIZE BIT(4) 428 #define RFH_GEN_CFG_RB_CHUNK_SIZE_128 1 429 #define RFH_GEN_CFG_RB_CHUNK_SIZE_64 0 430 /* the driver assumes everywhere that the default RXQ is 0 */ 431 #define RFH_GEN_CFG_DEFAULT_RXQ_NUM 0xF00 432 #define RFH_GEN_CFG_VAL(_n, _v) FIELD_PREP(RFH_GEN_CFG_ ## _n, _v) 433 434 /* end of 9000 rx series registers */ 435 436 /* TFDB Area - TFDs buffer table */ 437 #define FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK (0xFFFFFFFF) 438 #define FH_TFDIB_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x900) 439 #define FH_TFDIB_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0x958) 440 #define FH_TFDIB_CTRL0_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl)) 441 #define FH_TFDIB_CTRL1_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl) + 0x4) 442 443 /** 444 * Transmit DMA Channel Control/Status Registers (TCSR) 445 * 446 * Device has one configuration register for each of 8 Tx DMA/FIFO channels 447 * supported in hardware (don't confuse these with the 16 Tx queues in DRAM, 448 * which feed the DMA/FIFO channels); config regs are separated by 0x20 bytes. 449 * 450 * To use a Tx DMA channel, driver must initialize its 451 * FH_TCSR_CHNL_TX_CONFIG_REG(chnl) with: 452 * 453 * FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | 454 * FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL 455 * 456 * All other bits should be 0. 457 * 458 * Bit fields: 459 * 31-30: Tx DMA channel enable: '00' off/pause, '01' pause at end of frame, 460 * '10' operate normally 461 * 29- 4: Reserved, set to "0" 462 * 3: Enable internal DMA requests (1, normal operation), disable (0) 463 * 2- 0: Reserved, set to "0" 464 */ 465 #define FH_TCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xD00) 466 #define FH_TCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xE60) 467 468 /* Find Control/Status reg for given Tx DMA/FIFO channel */ 469 #define FH_TCSR_CHNL_NUM (8) 470 471 /* TCSR: tx_config register values */ 472 #define FH_TCSR_CHNL_TX_CONFIG_REG(_chnl) \ 473 (FH_TCSR_LOWER_BOUND + 0x20 * (_chnl)) 474 #define FH_TCSR_CHNL_TX_CREDIT_REG(_chnl) \ 475 (FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x4) 476 #define FH_TCSR_CHNL_TX_BUF_STS_REG(_chnl) \ 477 (FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x8) 478 479 #define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF (0x00000000) 480 #define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_DRV (0x00000001) 481 482 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE (0x00000000) 483 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE (0x00000008) 484 485 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_NOINT (0x00000000) 486 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD (0x00100000) 487 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD (0x00200000) 488 489 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT (0x00000000) 490 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_ENDTFD (0x00400000) 491 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_IFTFD (0x00800000) 492 493 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE (0x00000000) 494 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE_EOF (0x40000000) 495 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE (0x80000000) 496 497 #define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_EMPTY (0x00000000) 498 #define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_WAIT (0x00002000) 499 #define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID (0x00000003) 500 501 #define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM (20) 502 #define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX (12) 503 504 /** 505 * Tx Shared Status Registers (TSSR) 506 * 507 * After stopping Tx DMA channel (writing 0 to 508 * FH_TCSR_CHNL_TX_CONFIG_REG(chnl)), driver must poll 509 * FH_TSSR_TX_STATUS_REG until selected Tx channel is idle 510 * (channel's buffers empty | no pending requests). 511 * 512 * Bit fields: 513 * 31-24: 1 = Channel buffers empty (channel 7:0) 514 * 23-16: 1 = No pending requests (channel 7:0) 515 */ 516 #define FH_TSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xEA0) 517 #define FH_TSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xEC0) 518 519 #define FH_TSSR_TX_STATUS_REG (FH_TSSR_LOWER_BOUND + 0x010) 520 521 /** 522 * Bit fields for TSSR(Tx Shared Status & Control) error status register: 523 * 31: Indicates an address error when accessed to internal memory 524 * uCode/driver must write "1" in order to clear this flag 525 * 30: Indicates that Host did not send the expected number of dwords to FH 526 * uCode/driver must write "1" in order to clear this flag 527 * 16-9:Each status bit is for one channel. Indicates that an (Error) ActDMA 528 * command was received from the scheduler while the TRB was already full 529 * with previous command 530 * uCode/driver must write "1" in order to clear this flag 531 * 7-0: Each status bit indicates a channel's TxCredit error. When an error 532 * bit is set, it indicates that the FH has received a full indication 533 * from the RTC TxFIFO and the current value of the TxCredit counter was 534 * not equal to zero. This mean that the credit mechanism was not 535 * synchronized to the TxFIFO status 536 * uCode/driver must write "1" in order to clear this flag 537 */ 538 #define FH_TSSR_TX_ERROR_REG (FH_TSSR_LOWER_BOUND + 0x018) 539 #define FH_TSSR_TX_MSG_CONFIG_REG (FH_TSSR_LOWER_BOUND + 0x008) 540 541 #define FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) ((1 << (_chnl)) << 16) 542 543 /* Tx service channels */ 544 #define FH_SRVC_CHNL (9) 545 #define FH_SRVC_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9C8) 546 #define FH_SRVC_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0) 547 #define FH_SRVC_CHNL_SRAM_ADDR_REG(_chnl) \ 548 (FH_SRVC_LOWER_BOUND + ((_chnl) - 9) * 0x4) 549 550 #define FH_TX_CHICKEN_BITS_REG (FH_MEM_LOWER_BOUND + 0xE98) 551 #define FH_TX_TRB_REG(_chan) (FH_MEM_LOWER_BOUND + 0x958 + (_chan) * 4) 552 553 /* Instruct FH to increment the retry count of a packet when 554 * it is brought from the memory to TX-FIFO 555 */ 556 #define FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN (0x00000002) 557 558 #define RX_POOL_SIZE(rbds) ((rbds) - 1 + \ 559 IWL_MAX_RX_HW_QUEUES * \ 560 (RX_CLAIM_REQ_ALLOC - RX_POST_REQ_ALLOC)) 561 /* cb size is the exponent */ 562 #define RX_QUEUE_CB_SIZE(x) ilog2(x) 563 564 #define RX_QUEUE_SIZE 256 565 #define RX_QUEUE_MASK 255 566 #define RX_QUEUE_SIZE_LOG 8 567 568 /** 569 * struct iwl_rb_status - reserve buffer status 570 * host memory mapped FH registers 571 * @closed_rb_num [0:11] - Indicates the index of the RB which was closed 572 * @closed_fr_num [0:11] - Indicates the index of the RX Frame which was closed 573 * @finished_rb_num [0:11] - Indicates the index of the current RB 574 * in which the last frame was written to 575 * @finished_fr_num [0:11] - Indicates the index of the RX Frame 576 * which was transferred 577 */ 578 struct iwl_rb_status { 579 __le16 closed_rb_num; 580 __le16 closed_fr_num; 581 __le16 finished_rb_num; 582 __le16 finished_fr_nam; 583 __le32 __spare; 584 } __packed; 585 586 587 #define TFD_QUEUE_SIZE_MAX (256) 588 #define TFD_QUEUE_SIZE_MAX_GEN3 (65536) 589 /* cb size is the exponent - 3 */ 590 #define TFD_QUEUE_CB_SIZE(x) (ilog2(x) - 3) 591 #define TFD_QUEUE_SIZE_BC_DUP (64) 592 #define TFD_QUEUE_BC_SIZE (TFD_QUEUE_SIZE_MAX + TFD_QUEUE_SIZE_BC_DUP) 593 #define TFD_QUEUE_BC_SIZE_GEN3_AX210 1024 594 #define TFD_QUEUE_BC_SIZE_GEN3_BZ (1024 * 4) 595 #define IWL_TX_DMA_MASK DMA_BIT_MASK(36) 596 #define IWL_NUM_OF_TBS 20 597 #define IWL_TFH_NUM_TBS 25 598 599 /* IMR DMA registers */ 600 #define IMR_TFH_SRV_DMA_CHNL0_CTRL 0x00a0a51c 601 #define IMR_TFH_SRV_DMA_CHNL0_SRAM_ADDR 0x00a0a520 602 #define IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_LSB 0x00a0a524 603 #define IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_MSB 0x00a0a528 604 #define IMR_TFH_SRV_DMA_CHNL0_BC 0x00a0a52c 605 #define TFH_SRV_DMA_CHNL0_LEFT_BC 0x00a0a530 606 607 /* RFH S2D DMA registers */ 608 #define IMR_RFH_GEN_CFG_SERVICE_DMA_RS_MSK 0x0000000c 609 #define IMR_RFH_GEN_CFG_SERVICE_DMA_SNOOP_MSK 0x00000002 610 611 /* TFH D2S DMA registers */ 612 #define IMR_UREG_CHICK_HALT_UMAC_PERMANENTLY_MSK 0x80000000 613 #define IMR_UREG_CHICK 0x00d05c00 614 #define IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_IRQ_TARGET_POS 0x00800000 615 #define IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_RS_MSK 0x00000030 616 #define IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_DMA_EN_POS 0x80000000 617 618 static inline u8 iwl_get_dma_hi_addr(dma_addr_t addr) 619 { 620 return (sizeof(addr) > sizeof(u32) ? upper_32_bits(addr) : 0) & 0xF; 621 } 622 623 /** 624 * enum iwl_tfd_tb_hi_n_len - TB hi_n_len bits 625 * @TB_HI_N_LEN_ADDR_HI_MSK: high 4 bits (to make it 36) of DMA address 626 * @TB_HI_N_LEN_LEN_MSK: length of the TB 627 */ 628 enum iwl_tfd_tb_hi_n_len { 629 TB_HI_N_LEN_ADDR_HI_MSK = 0xf, 630 TB_HI_N_LEN_LEN_MSK = 0xfff0, 631 }; 632 633 /** 634 * struct iwl_tfd_tb transmit buffer descriptor within transmit frame descriptor 635 * 636 * This structure contains dma address and length of transmission address 637 * 638 * @lo: low [31:0] portion of the dma address of TX buffer 639 * every even is unaligned on 16 bit boundary 640 * @hi_n_len: &enum iwl_tfd_tb_hi_n_len 641 */ 642 struct iwl_tfd_tb { 643 __le32 lo; 644 __le16 hi_n_len; 645 } __packed; 646 647 /** 648 * struct iwl_tfh_tb transmit buffer descriptor within transmit frame descriptor 649 * 650 * This structure contains dma address and length of transmission address 651 * 652 * @tb_len length of the tx buffer 653 * @addr 64 bits dma address 654 */ 655 struct iwl_tfh_tb { 656 __le16 tb_len; 657 __le64 addr; 658 } __packed; 659 660 /** 661 * Each Tx queue uses a circular buffer of 256 TFDs stored in host DRAM. 662 * Both driver and device share these circular buffers, each of which must be 663 * contiguous 256 TFDs. 664 * For pre 22000 HW it is 256 x 128 bytes-per-TFD = 32 KBytes 665 * For 22000 HW and on it is 256 x 256 bytes-per-TFD = 65 KBytes 666 * 667 * Driver must indicate the physical address of the base of each 668 * circular buffer via the FH_MEM_CBBC_QUEUE registers. 669 * 670 * Each TFD contains pointer/size information for up to 20 / 25 data buffers 671 * in host DRAM. These buffers collectively contain the (one) frame described 672 * by the TFD. Each buffer must be a single contiguous block of memory within 673 * itself, but buffers may be scattered in host DRAM. Each buffer has max size 674 * of (4K - 4). The concatenates all of a TFD's buffers into a single 675 * Tx frame, up to 8 KBytes in size. 676 * 677 * A maximum of 255 (not 256!) TFDs may be on a queue waiting for Tx. 678 */ 679 680 /** 681 * struct iwl_tfd - Transmit Frame Descriptor (TFD) 682 * @ __reserved1[3] reserved 683 * @ num_tbs 0-4 number of active tbs 684 * 5 reserved 685 * 6-7 padding (not used) 686 * @ tbs[20] transmit frame buffer descriptors 687 * @ __pad padding 688 */ 689 struct iwl_tfd { 690 u8 __reserved1[3]; 691 u8 num_tbs; 692 struct iwl_tfd_tb tbs[IWL_NUM_OF_TBS]; 693 __le32 __pad; 694 } __packed; 695 696 /** 697 * struct iwl_tfh_tfd - Transmit Frame Descriptor (TFD) 698 * @ num_tbs 0-4 number of active tbs 699 * 5 -15 reserved 700 * @ tbs[25] transmit frame buffer descriptors 701 * @ __pad padding 702 */ 703 struct iwl_tfh_tfd { 704 __le16 num_tbs; 705 struct iwl_tfh_tb tbs[IWL_TFH_NUM_TBS]; 706 __le32 __pad; 707 } __packed; 708 709 /* Keep Warm Size */ 710 #define IWL_KW_SIZE 0x1000 /* 4k */ 711 712 /* Fixed (non-configurable) rx data from phy */ 713 714 /** 715 * struct iwlagn_schedq_bc_tbl scheduler byte count table 716 * base physical address provided by SCD_DRAM_BASE_ADDR 717 * For devices up to 22000: 718 * @tfd_offset 0-12 - tx command byte count 719 * 12-16 - station index 720 * For 22000: 721 * @tfd_offset 0-12 - tx command byte count 722 * 12-13 - number of 64 byte chunks 723 * 14-16 - reserved 724 */ 725 struct iwlagn_scd_bc_tbl { 726 __le16 tfd_offset[TFD_QUEUE_BC_SIZE]; 727 } __packed; 728 729 /** 730 * struct iwl_gen3_bc_tbl_entry scheduler byte count table entry gen3 731 * For AX210 and on: 732 * @tfd_offset: 0-12 - tx command byte count 733 * 12-13 - number of 64 byte chunks 734 * 14-16 - reserved 735 */ 736 struct iwl_gen3_bc_tbl_entry { 737 __le16 tfd_offset; 738 } __packed; 739 740 #endif /* !__iwl_fh_h__ */ 741