root/drivers/net/wireless/intel/iwlwifi/iwl-fh.h

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INCLUDED FROM


DEFINITIONS

This source file includes following definitions.
  1. FH_MEM_CBBC_QUEUE
  2. iwl_get_dma_hi_addr

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
  10  * Copyright(c) 2018 - 2019 Intel Corporation
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called COPYING.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <linuxwifi@intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  * BSD LICENSE
  29  *
  30  * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
  31  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
  32  * Copyright(c) 2018 - 2019 Intel Corporation
  33  * All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  *
  39  *  * Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  *  * Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in
  43  *    the documentation and/or other materials provided with the
  44  *    distribution.
  45  *  * Neither the name Intel Corporation nor the names of its
  46  *    contributors may be used to endorse or promote products derived
  47  *    from this software without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  50  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  51  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  52  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  53  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  54  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  55  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  56  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  57  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  58  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  59  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  60  *
  61  *****************************************************************************/
  62 #ifndef __iwl_fh_h__
  63 #define __iwl_fh_h__
  64 
  65 #include <linux/types.h>
  66 #include <linux/bitfield.h>
  67 
  68 #include "iwl-trans.h"
  69 
  70 /****************************/
  71 /* Flow Handler Definitions */
  72 /****************************/
  73 
  74 /**
  75  * This I/O area is directly read/writable by driver (e.g. Linux uses writel())
  76  * Addresses are offsets from device's PCI hardware base address.
  77  */
  78 #define FH_MEM_LOWER_BOUND                   (0x1000)
  79 #define FH_MEM_UPPER_BOUND                   (0x2000)
  80 #define FH_MEM_LOWER_BOUND_GEN2              (0xa06000)
  81 #define FH_MEM_UPPER_BOUND_GEN2              (0xa08000)
  82 
  83 /**
  84  * Keep-Warm (KW) buffer base address.
  85  *
  86  * Driver must allocate a 4KByte buffer that is for keeping the
  87  * host DRAM powered on (via dummy accesses to DRAM) to maintain low-latency
  88  * DRAM access when doing Txing or Rxing.  The dummy accesses prevent host
  89  * from going into a power-savings mode that would cause higher DRAM latency,
  90  * and possible data over/under-runs, before all Tx/Rx is complete.
  91  *
  92  * Driver loads FH_KW_MEM_ADDR_REG with the physical address (bits 35:4)
  93  * of the buffer, which must be 4K aligned.  Once this is set up, the device
  94  * automatically invokes keep-warm accesses when normal accesses might not
  95  * be sufficient to maintain fast DRAM response.
  96  *
  97  * Bit fields:
  98  *  31-0:  Keep-warm buffer physical base address [35:4], must be 4K aligned
  99  */
 100 #define FH_KW_MEM_ADDR_REG                   (FH_MEM_LOWER_BOUND + 0x97C)
 101 
 102 
 103 /**
 104  * TFD Circular Buffers Base (CBBC) addresses
 105  *
 106  * Device has 16 base pointer registers, one for each of 16 host-DRAM-resident
 107  * circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs)
 108  * (see struct iwl_tfd_frame).  These 16 pointer registers are offset by 0x04
 109  * bytes from one another.  Each TFD circular buffer in DRAM must be 256-byte
 110  * aligned (address bits 0-7 must be 0).
 111  * Later devices have 20 (5000 series) or 30 (higher) queues, but the registers
 112  * for them are in different places.
 113  *
 114  * Bit fields in each pointer register:
 115  *  27-0: TFD CB physical base address [35:8], must be 256-byte aligned
 116  */
 117 #define FH_MEM_CBBC_0_15_LOWER_BOUND            (FH_MEM_LOWER_BOUND + 0x9D0)
 118 #define FH_MEM_CBBC_0_15_UPPER_BOUND            (FH_MEM_LOWER_BOUND + 0xA10)
 119 #define FH_MEM_CBBC_16_19_LOWER_BOUND           (FH_MEM_LOWER_BOUND + 0xBF0)
 120 #define FH_MEM_CBBC_16_19_UPPER_BOUND           (FH_MEM_LOWER_BOUND + 0xC00)
 121 #define FH_MEM_CBBC_20_31_LOWER_BOUND           (FH_MEM_LOWER_BOUND + 0xB20)
 122 #define FH_MEM_CBBC_20_31_UPPER_BOUND           (FH_MEM_LOWER_BOUND + 0xB80)
 123 /* 22000 TFD table address, 64 bit */
 124 #define TFH_TFDQ_CBB_TABLE                      (0x1C00)
 125 
 126 /* Find TFD CB base pointer for given queue */
 127 static inline unsigned int FH_MEM_CBBC_QUEUE(struct iwl_trans *trans,
 128                                              unsigned int chnl)
 129 {
 130         if (trans->trans_cfg->use_tfh) {
 131                 WARN_ON_ONCE(chnl >= 64);
 132                 return TFH_TFDQ_CBB_TABLE + 8 * chnl;
 133         }
 134         if (chnl < 16)
 135                 return FH_MEM_CBBC_0_15_LOWER_BOUND + 4 * chnl;
 136         if (chnl < 20)
 137                 return FH_MEM_CBBC_16_19_LOWER_BOUND + 4 * (chnl - 16);
 138         WARN_ON_ONCE(chnl >= 32);
 139         return FH_MEM_CBBC_20_31_LOWER_BOUND + 4 * (chnl - 20);
 140 }
 141 
 142 /* 22000 configuration registers */
 143 
 144 /*
 145  * TFH Configuration register.
 146  *
 147  * BIT fields:
 148  *
 149  * Bits 3:0:
 150  * Define the maximum number of pending read requests.
 151  * Maximum configration value allowed is 0xC
 152  * Bits 9:8:
 153  * Define the maximum transfer size. (64 / 128 / 256)
 154  * Bit 10:
 155  * When bit is set and transfer size is set to 128B, the TFH will enable
 156  * reading chunks of more than 64B only if the read address is aligned to 128B.
 157  * In case of DRAM read address which is not aligned to 128B, the TFH will
 158  * enable transfer size which doesn't cross 64B DRAM address boundary.
 159 */
 160 #define TFH_TRANSFER_MODE               (0x1F40)
 161 #define TFH_TRANSFER_MAX_PENDING_REQ    0xc
 162 #define TFH_CHUNK_SIZE_128                      BIT(8)
 163 #define TFH_CHUNK_SPLIT_MODE            BIT(10)
 164 /*
 165  * Defines the offset address in dwords referring from the beginning of the
 166  * Tx CMD which will be updated in DRAM.
 167  * Note that the TFH offset address for Tx CMD update is always referring to
 168  * the start of the TFD first TB.
 169  * In case of a DRAM Tx CMD update the TFH will update PN and Key ID
 170  */
 171 #define TFH_TXCMD_UPDATE_CFG            (0x1F48)
 172 /*
 173  * Controls TX DMA operation
 174  *
 175  * BIT fields:
 176  *
 177  * Bits 31:30: Enable the SRAM DMA channel.
 178  * Turning on bit 31 will kick the SRAM2DRAM DMA.
 179  * Note that the sram2dram may be enabled only after configuring the DRAM and
 180  * SRAM addresses registers and the byte count register.
 181  * Bits 25:24: Defines the interrupt target upon dram2sram transfer done. When
 182  * set to 1 - interrupt is sent to the driver
 183  * Bit 0: Indicates the snoop configuration
 184 */
 185 #define TFH_SRV_DMA_CHNL0_CTRL  (0x1F60)
 186 #define TFH_SRV_DMA_SNOOP       BIT(0)
 187 #define TFH_SRV_DMA_TO_DRIVER   BIT(24)
 188 #define TFH_SRV_DMA_START       BIT(31)
 189 
 190 /* Defines the DMA SRAM write start address to transfer a data block */
 191 #define TFH_SRV_DMA_CHNL0_SRAM_ADDR     (0x1F64)
 192 
 193 /* Defines the 64bits DRAM start address to read the DMA data block from */
 194 #define TFH_SRV_DMA_CHNL0_DRAM_ADDR     (0x1F68)
 195 
 196 /*
 197  * Defines the number of bytes to transfer from DRAM to SRAM.
 198  * Note that this register may be configured with non-dword aligned size.
 199  */
 200 #define TFH_SRV_DMA_CHNL0_BC    (0x1F70)
 201 
 202 /**
 203  * Rx SRAM Control and Status Registers (RSCSR)
 204  *
 205  * These registers provide handshake between driver and device for the Rx queue
 206  * (this queue handles *all* command responses, notifications, Rx data, etc.
 207  * sent from uCode to host driver).  Unlike Tx, there is only one Rx
 208  * queue, and only one Rx DMA/FIFO channel.  Also unlike Tx, which can
 209  * concatenate up to 20 DRAM buffers to form a Tx frame, each Receive Buffer
 210  * Descriptor (RBD) points to only one Rx Buffer (RB); there is a 1:1
 211  * mapping between RBDs and RBs.
 212  *
 213  * Driver must allocate host DRAM memory for the following, and set the
 214  * physical address of each into device registers:
 215  *
 216  * 1)  Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256
 217  *     entries (although any power of 2, up to 4096, is selectable by driver).
 218  *     Each entry (1 dword) points to a receive buffer (RB) of consistent size
 219  *     (typically 4K, although 8K or 16K are also selectable by driver).
 220  *     Driver sets up RB size and number of RBDs in the CB via Rx config
 221  *     register FH_MEM_RCSR_CHNL0_CONFIG_REG.
 222  *
 223  *     Bit fields within one RBD:
 224  *     27-0:  Receive Buffer physical address bits [35:8], 256-byte aligned
 225  *
 226  *     Driver sets physical address [35:8] of base of RBD circular buffer
 227  *     into FH_RSCSR_CHNL0_RBDCB_BASE_REG [27:0].
 228  *
 229  * 2)  Rx status buffer, 8 bytes, in which uCode indicates which Rx Buffers
 230  *     (RBs) have been filled, via a "write pointer", actually the index of
 231  *     the RB's corresponding RBD within the circular buffer.  Driver sets
 232  *     physical address [35:4] into FH_RSCSR_CHNL0_STTS_WPTR_REG [31:0].
 233  *
 234  *     Bit fields in lower dword of Rx status buffer (upper dword not used
 235  *     by driver:
 236  *     31-12:  Not used by driver
 237  *     11- 0:  Index of last filled Rx buffer descriptor
 238  *             (device writes, driver reads this value)
 239  *
 240  * As the driver prepares Receive Buffers (RBs) for device to fill, driver must
 241  * enter pointers to these RBs into contiguous RBD circular buffer entries,
 242  * and update the device's "write" index register,
 243  * FH_RSCSR_CHNL0_RBDCB_WPTR_REG.
 244  *
 245  * This "write" index corresponds to the *next* RBD that the driver will make
 246  * available, i.e. one RBD past the tail of the ready-to-fill RBDs within
 247  * the circular buffer.  This value should initially be 0 (before preparing any
 248  * RBs), should be 8 after preparing the first 8 RBs (for example), and must
 249  * wrap back to 0 at the end of the circular buffer (but don't wrap before
 250  * "read" index has advanced past 1!  See below).
 251  * NOTE:  DEVICE EXPECTS THE WRITE INDEX TO BE INCREMENTED IN MULTIPLES OF 8.
 252  *
 253  * As the device fills RBs (referenced from contiguous RBDs within the circular
 254  * buffer), it updates the Rx status buffer in host DRAM, 2) described above,
 255  * to tell the driver the index of the latest filled RBD.  The driver must
 256  * read this "read" index from DRAM after receiving an Rx interrupt from device
 257  *
 258  * The driver must also internally keep track of a third index, which is the
 259  * next RBD to process.  When receiving an Rx interrupt, driver should process
 260  * all filled but unprocessed RBs up to, but not including, the RB
 261  * corresponding to the "read" index.  For example, if "read" index becomes "1",
 262  * driver may process the RB pointed to by RBD 0.  Depending on volume of
 263  * traffic, there may be many RBs to process.
 264  *
 265  * If read index == write index, device thinks there is no room to put new data.
 266  * Due to this, the maximum number of filled RBs is 255, instead of 256.  To
 267  * be safe, make sure that there is a gap of at least 2 RBDs between "write"
 268  * and "read" indexes; that is, make sure that there are no more than 254
 269  * buffers waiting to be filled.
 270  */
 271 #define FH_MEM_RSCSR_LOWER_BOUND        (FH_MEM_LOWER_BOUND + 0xBC0)
 272 #define FH_MEM_RSCSR_UPPER_BOUND        (FH_MEM_LOWER_BOUND + 0xC00)
 273 #define FH_MEM_RSCSR_CHNL0              (FH_MEM_RSCSR_LOWER_BOUND)
 274 
 275 /**
 276  * Physical base address of 8-byte Rx Status buffer.
 277  * Bit fields:
 278  *  31-0: Rx status buffer physical base address [35:4], must 16-byte aligned.
 279  */
 280 #define FH_RSCSR_CHNL0_STTS_WPTR_REG    (FH_MEM_RSCSR_CHNL0)
 281 
 282 /**
 283  * Physical base address of Rx Buffer Descriptor Circular Buffer.
 284  * Bit fields:
 285  *  27-0:  RBD CD physical base address [35:8], must be 256-byte aligned.
 286  */
 287 #define FH_RSCSR_CHNL0_RBDCB_BASE_REG   (FH_MEM_RSCSR_CHNL0 + 0x004)
 288 
 289 /**
 290  * Rx write pointer (index, really!).
 291  * Bit fields:
 292  *  11-0:  Index of driver's most recent prepared-to-be-filled RBD, + 1.
 293  *         NOTE:  For 256-entry circular buffer, use only bits [7:0].
 294  */
 295 #define FH_RSCSR_CHNL0_RBDCB_WPTR_REG   (FH_MEM_RSCSR_CHNL0 + 0x008)
 296 #define FH_RSCSR_CHNL0_WPTR        (FH_RSCSR_CHNL0_RBDCB_WPTR_REG)
 297 
 298 #define FW_RSCSR_CHNL0_RXDCB_RDPTR_REG  (FH_MEM_RSCSR_CHNL0 + 0x00c)
 299 #define FH_RSCSR_CHNL0_RDPTR            FW_RSCSR_CHNL0_RXDCB_RDPTR_REG
 300 
 301 /**
 302  * Rx Config/Status Registers (RCSR)
 303  * Rx Config Reg for channel 0 (only channel used)
 304  *
 305  * Driver must initialize FH_MEM_RCSR_CHNL0_CONFIG_REG as follows for
 306  * normal operation (see bit fields).
 307  *
 308  * Clearing FH_MEM_RCSR_CHNL0_CONFIG_REG to 0 turns off Rx DMA.
 309  * Driver should poll FH_MEM_RSSR_RX_STATUS_REG for
 310  * FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (bit 24) before continuing.
 311  *
 312  * Bit fields:
 313  * 31-30: Rx DMA channel enable: '00' off/pause, '01' pause at end of frame,
 314  *        '10' operate normally
 315  * 29-24: reserved
 316  * 23-20: # RBDs in circular buffer = 2^value; use "8" for 256 RBDs (normal),
 317  *        min "5" for 32 RBDs, max "12" for 4096 RBDs.
 318  * 19-18: reserved
 319  * 17-16: size of each receive buffer; '00' 4K (normal), '01' 8K,
 320  *        '10' 12K, '11' 16K.
 321  * 15-14: reserved
 322  * 13-12: IRQ destination; '00' none, '01' host driver (normal operation)
 323  * 11- 4: timeout for closing Rx buffer and interrupting host (units 32 usec)
 324  *        typical value 0x10 (about 1/2 msec)
 325  *  3- 0: reserved
 326  */
 327 #define FH_MEM_RCSR_LOWER_BOUND      (FH_MEM_LOWER_BOUND + 0xC00)
 328 #define FH_MEM_RCSR_UPPER_BOUND      (FH_MEM_LOWER_BOUND + 0xCC0)
 329 #define FH_MEM_RCSR_CHNL0            (FH_MEM_RCSR_LOWER_BOUND)
 330 
 331 #define FH_MEM_RCSR_CHNL0_CONFIG_REG    (FH_MEM_RCSR_CHNL0)
 332 #define FH_MEM_RCSR_CHNL0_RBDCB_WPTR    (FH_MEM_RCSR_CHNL0 + 0x8)
 333 #define FH_MEM_RCSR_CHNL0_FLUSH_RB_REQ  (FH_MEM_RCSR_CHNL0 + 0x10)
 334 
 335 #define FH_RCSR_CHNL0_RX_CONFIG_RB_TIMEOUT_MSK (0x00000FF0) /* bits 4-11 */
 336 #define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_MSK   (0x00001000) /* bits 12 */
 337 #define FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK (0x00008000) /* bit 15 */
 338 #define FH_RCSR_CHNL0_RX_CONFIG_RB_SIZE_MSK   (0x00030000) /* bits 16-17 */
 339 #define FH_RCSR_CHNL0_RX_CONFIG_RBDBC_SIZE_MSK (0x00F00000) /* bits 20-23 */
 340 #define FH_RCSR_CHNL0_RX_CONFIG_DMA_CHNL_EN_MSK (0xC0000000) /* bits 30-31*/
 341 
 342 #define FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS        (20)
 343 #define FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS      (4)
 344 #define RX_RB_TIMEOUT   (0x11)
 345 
 346 #define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_VAL         (0x00000000)
 347 #define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_EOF_VAL     (0x40000000)
 348 #define FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL        (0x80000000)
 349 
 350 #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K    (0x00000000)
 351 #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K    (0x00010000)
 352 #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K   (0x00020000)
 353 #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_16K   (0x00030000)
 354 
 355 #define FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY              (0x00000004)
 356 #define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_NO_INT_VAL    (0x00000000)
 357 #define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL  (0x00001000)
 358 
 359 /**
 360  * Rx Shared Status Registers (RSSR)
 361  *
 362  * After stopping Rx DMA channel (writing 0 to
 363  * FH_MEM_RCSR_CHNL0_CONFIG_REG), driver must poll
 364  * FH_MEM_RSSR_RX_STATUS_REG until Rx channel is idle.
 365  *
 366  * Bit fields:
 367  *  24:  1 = Channel 0 is idle
 368  *
 369  * FH_MEM_RSSR_SHARED_CTRL_REG and FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV
 370  * contain default values that should not be altered by the driver.
 371  */
 372 #define FH_MEM_RSSR_LOWER_BOUND           (FH_MEM_LOWER_BOUND + 0xC40)
 373 #define FH_MEM_RSSR_UPPER_BOUND           (FH_MEM_LOWER_BOUND + 0xD00)
 374 
 375 #define FH_MEM_RSSR_SHARED_CTRL_REG       (FH_MEM_RSSR_LOWER_BOUND)
 376 #define FH_MEM_RSSR_RX_STATUS_REG       (FH_MEM_RSSR_LOWER_BOUND + 0x004)
 377 #define FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV\
 378                                         (FH_MEM_RSSR_LOWER_BOUND + 0x008)
 379 
 380 #define FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE       (0x01000000)
 381 
 382 #define FH_MEM_TFDIB_REG1_ADDR_BITSHIFT 28
 383 #define FH_MEM_TB_MAX_LENGTH                    (0x00020000)
 384 
 385 /* 9000 rx series registers */
 386 
 387 #define RFH_Q0_FRBDCB_BA_LSB 0xA08000 /* 64 bit address */
 388 #define RFH_Q_FRBDCB_BA_LSB(q) (RFH_Q0_FRBDCB_BA_LSB + (q) * 8)
 389 /* Write index table */
 390 #define RFH_Q0_FRBDCB_WIDX 0xA08080
 391 #define RFH_Q_FRBDCB_WIDX(q) (RFH_Q0_FRBDCB_WIDX + (q) * 4)
 392 /* Write index table - shadow registers */
 393 #define RFH_Q0_FRBDCB_WIDX_TRG 0x1C80
 394 #define RFH_Q_FRBDCB_WIDX_TRG(q) (RFH_Q0_FRBDCB_WIDX_TRG + (q) * 4)
 395 /* Read index table */
 396 #define RFH_Q0_FRBDCB_RIDX 0xA080C0
 397 #define RFH_Q_FRBDCB_RIDX(q) (RFH_Q0_FRBDCB_RIDX + (q) * 4)
 398 /* Used list table */
 399 #define RFH_Q0_URBDCB_BA_LSB 0xA08100 /* 64 bit address */
 400 #define RFH_Q_URBDCB_BA_LSB(q) (RFH_Q0_URBDCB_BA_LSB + (q) * 8)
 401 /* Write index table */
 402 #define RFH_Q0_URBDCB_WIDX 0xA08180
 403 #define RFH_Q_URBDCB_WIDX(q) (RFH_Q0_URBDCB_WIDX + (q) * 4)
 404 #define RFH_Q0_URBDCB_VAID 0xA081C0
 405 #define RFH_Q_URBDCB_VAID(q) (RFH_Q0_URBDCB_VAID + (q) * 4)
 406 /* stts */
 407 #define RFH_Q0_URBD_STTS_WPTR_LSB 0xA08200 /*64 bits address */
 408 #define RFH_Q_URBD_STTS_WPTR_LSB(q) (RFH_Q0_URBD_STTS_WPTR_LSB + (q) * 8)
 409 
 410 #define RFH_Q0_ORB_WPTR_LSB 0xA08280
 411 #define RFH_Q_ORB_WPTR_LSB(q) (RFH_Q0_ORB_WPTR_LSB + (q) * 8)
 412 #define RFH_RBDBUF_RBD0_LSB 0xA08300
 413 #define RFH_RBDBUF_RBD_LSB(q) (RFH_RBDBUF_RBD0_LSB + (q) * 8)
 414 
 415 /**
 416  * RFH Status Register
 417  *
 418  * Bit fields:
 419  *
 420  * Bit 29: RBD_FETCH_IDLE
 421  * This status flag is set by the RFH when there is no active RBD fetch from
 422  * DRAM.
 423  * Once the RFH RBD controller starts fetching (or when there is a pending
 424  * RBD read response from DRAM), this flag is immediately turned off.
 425  *
 426  * Bit 30: SRAM_DMA_IDLE
 427  * This status flag is set by the RFH when there is no active transaction from
 428  * SRAM to DRAM.
 429  * Once the SRAM to DRAM DMA is active, this flag is immediately turned off.
 430  *
 431  * Bit 31: RXF_DMA_IDLE
 432  * This status flag is set by the RFH when there is no active transaction from
 433  * RXF to DRAM.
 434  * Once the RXF-to-DRAM DMA is active, this flag is immediately turned off.
 435  */
 436 #define RFH_GEN_STATUS          0xA09808
 437 #define RFH_GEN_STATUS_GEN3     0xA07824
 438 #define RBD_FETCH_IDLE  BIT(29)
 439 #define SRAM_DMA_IDLE   BIT(30)
 440 #define RXF_DMA_IDLE    BIT(31)
 441 
 442 /* DMA configuration */
 443 #define RFH_RXF_DMA_CFG         0xA09820
 444 #define RFH_RXF_DMA_CFG_GEN3    0xA07880
 445 /* RB size */
 446 #define RFH_RXF_DMA_RB_SIZE_MASK (0x000F0000) /* bits 16-19 */
 447 #define RFH_RXF_DMA_RB_SIZE_POS 16
 448 #define RFH_RXF_DMA_RB_SIZE_1K  (0x1 << RFH_RXF_DMA_RB_SIZE_POS)
 449 #define RFH_RXF_DMA_RB_SIZE_2K  (0x2 << RFH_RXF_DMA_RB_SIZE_POS)
 450 #define RFH_RXF_DMA_RB_SIZE_4K  (0x4 << RFH_RXF_DMA_RB_SIZE_POS)
 451 #define RFH_RXF_DMA_RB_SIZE_8K  (0x8 << RFH_RXF_DMA_RB_SIZE_POS)
 452 #define RFH_RXF_DMA_RB_SIZE_12K (0x9 << RFH_RXF_DMA_RB_SIZE_POS)
 453 #define RFH_RXF_DMA_RB_SIZE_16K (0xA << RFH_RXF_DMA_RB_SIZE_POS)
 454 #define RFH_RXF_DMA_RB_SIZE_20K (0xB << RFH_RXF_DMA_RB_SIZE_POS)
 455 #define RFH_RXF_DMA_RB_SIZE_24K (0xC << RFH_RXF_DMA_RB_SIZE_POS)
 456 #define RFH_RXF_DMA_RB_SIZE_28K (0xD << RFH_RXF_DMA_RB_SIZE_POS)
 457 #define RFH_RXF_DMA_RB_SIZE_32K (0xE << RFH_RXF_DMA_RB_SIZE_POS)
 458 /* RB Circular Buffer size:defines the table sizes in RBD units */
 459 #define RFH_RXF_DMA_RBDCB_SIZE_MASK (0x00F00000) /* bits 20-23 */
 460 #define RFH_RXF_DMA_RBDCB_SIZE_POS 20
 461 #define RFH_RXF_DMA_RBDCB_SIZE_8        (0x3 << RFH_RXF_DMA_RBDCB_SIZE_POS)
 462 #define RFH_RXF_DMA_RBDCB_SIZE_16       (0x4 << RFH_RXF_DMA_RBDCB_SIZE_POS)
 463 #define RFH_RXF_DMA_RBDCB_SIZE_32       (0x5 << RFH_RXF_DMA_RBDCB_SIZE_POS)
 464 #define RFH_RXF_DMA_RBDCB_SIZE_64       (0x7 << RFH_RXF_DMA_RBDCB_SIZE_POS)
 465 #define RFH_RXF_DMA_RBDCB_SIZE_128      (0x7 << RFH_RXF_DMA_RBDCB_SIZE_POS)
 466 #define RFH_RXF_DMA_RBDCB_SIZE_256      (0x8 << RFH_RXF_DMA_RBDCB_SIZE_POS)
 467 #define RFH_RXF_DMA_RBDCB_SIZE_512      (0x9 << RFH_RXF_DMA_RBDCB_SIZE_POS)
 468 #define RFH_RXF_DMA_RBDCB_SIZE_1024     (0xA << RFH_RXF_DMA_RBDCB_SIZE_POS)
 469 #define RFH_RXF_DMA_RBDCB_SIZE_2048     (0xB << RFH_RXF_DMA_RBDCB_SIZE_POS)
 470 #define RFH_RXF_DMA_MIN_RB_SIZE_MASK    (0x03000000) /* bit 24-25 */
 471 #define RFH_RXF_DMA_MIN_RB_SIZE_POS     24
 472 #define RFH_RXF_DMA_MIN_RB_4_8          (3 << RFH_RXF_DMA_MIN_RB_SIZE_POS)
 473 #define RFH_RXF_DMA_DROP_TOO_LARGE_MASK (0x04000000) /* bit 26 */
 474 #define RFH_RXF_DMA_SINGLE_FRAME_MASK   (0x20000000) /* bit 29 */
 475 #define RFH_DMA_EN_MASK                 (0xC0000000) /* bits 30-31*/
 476 #define RFH_DMA_EN_ENABLE_VAL           BIT(31)
 477 
 478 #define RFH_RXF_RXQ_ACTIVE 0xA0980C
 479 
 480 #define RFH_GEN_CFG     0xA09800
 481 #define RFH_GEN_CFG_SERVICE_DMA_SNOOP   BIT(0)
 482 #define RFH_GEN_CFG_RFH_DMA_SNOOP       BIT(1)
 483 #define RFH_GEN_CFG_RB_CHUNK_SIZE       BIT(4)
 484 #define RFH_GEN_CFG_RB_CHUNK_SIZE_128   1
 485 #define RFH_GEN_CFG_RB_CHUNK_SIZE_64    0
 486 /* the driver assumes everywhere that the default RXQ is 0 */
 487 #define RFH_GEN_CFG_DEFAULT_RXQ_NUM     0xF00
 488 #define RFH_GEN_CFG_VAL(_n, _v)         FIELD_PREP(RFH_GEN_CFG_ ## _n, _v)
 489 
 490 /* end of 9000 rx series registers */
 491 
 492 /* TFDB  Area - TFDs buffer table */
 493 #define FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK      (0xFFFFFFFF)
 494 #define FH_TFDIB_LOWER_BOUND       (FH_MEM_LOWER_BOUND + 0x900)
 495 #define FH_TFDIB_UPPER_BOUND       (FH_MEM_LOWER_BOUND + 0x958)
 496 #define FH_TFDIB_CTRL0_REG(_chnl)  (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl))
 497 #define FH_TFDIB_CTRL1_REG(_chnl)  (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl) + 0x4)
 498 
 499 /**
 500  * Transmit DMA Channel Control/Status Registers (TCSR)
 501  *
 502  * Device has one configuration register for each of 8 Tx DMA/FIFO channels
 503  * supported in hardware (don't confuse these with the 16 Tx queues in DRAM,
 504  * which feed the DMA/FIFO channels); config regs are separated by 0x20 bytes.
 505  *
 506  * To use a Tx DMA channel, driver must initialize its
 507  * FH_TCSR_CHNL_TX_CONFIG_REG(chnl) with:
 508  *
 509  * FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
 510  * FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL
 511  *
 512  * All other bits should be 0.
 513  *
 514  * Bit fields:
 515  * 31-30: Tx DMA channel enable: '00' off/pause, '01' pause at end of frame,
 516  *        '10' operate normally
 517  * 29- 4: Reserved, set to "0"
 518  *     3: Enable internal DMA requests (1, normal operation), disable (0)
 519  *  2- 0: Reserved, set to "0"
 520  */
 521 #define FH_TCSR_LOWER_BOUND  (FH_MEM_LOWER_BOUND + 0xD00)
 522 #define FH_TCSR_UPPER_BOUND  (FH_MEM_LOWER_BOUND + 0xE60)
 523 
 524 /* Find Control/Status reg for given Tx DMA/FIFO channel */
 525 #define FH_TCSR_CHNL_NUM                            (8)
 526 
 527 /* TCSR: tx_config register values */
 528 #define FH_TCSR_CHNL_TX_CONFIG_REG(_chnl)       \
 529                 (FH_TCSR_LOWER_BOUND + 0x20 * (_chnl))
 530 #define FH_TCSR_CHNL_TX_CREDIT_REG(_chnl)       \
 531                 (FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x4)
 532 #define FH_TCSR_CHNL_TX_BUF_STS_REG(_chnl)      \
 533                 (FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x8)
 534 
 535 #define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF          (0x00000000)
 536 #define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_DRV          (0x00000001)
 537 
 538 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE    (0x00000000)
 539 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE     (0x00000008)
 540 
 541 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_NOINT       (0x00000000)
 542 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD      (0x00100000)
 543 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD       (0x00200000)
 544 
 545 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT        (0x00000000)
 546 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_ENDTFD       (0x00400000)
 547 #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_IFTFD        (0x00800000)
 548 
 549 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE        (0x00000000)
 550 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE_EOF    (0x40000000)
 551 #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE       (0x80000000)
 552 
 553 #define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_EMPTY      (0x00000000)
 554 #define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_WAIT       (0x00002000)
 555 #define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID      (0x00000003)
 556 
 557 #define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM          (20)
 558 #define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX          (12)
 559 
 560 /**
 561  * Tx Shared Status Registers (TSSR)
 562  *
 563  * After stopping Tx DMA channel (writing 0 to
 564  * FH_TCSR_CHNL_TX_CONFIG_REG(chnl)), driver must poll
 565  * FH_TSSR_TX_STATUS_REG until selected Tx channel is idle
 566  * (channel's buffers empty | no pending requests).
 567  *
 568  * Bit fields:
 569  * 31-24:  1 = Channel buffers empty (channel 7:0)
 570  * 23-16:  1 = No pending requests (channel 7:0)
 571  */
 572 #define FH_TSSR_LOWER_BOUND             (FH_MEM_LOWER_BOUND + 0xEA0)
 573 #define FH_TSSR_UPPER_BOUND             (FH_MEM_LOWER_BOUND + 0xEC0)
 574 
 575 #define FH_TSSR_TX_STATUS_REG           (FH_TSSR_LOWER_BOUND + 0x010)
 576 
 577 /**
 578  * Bit fields for TSSR(Tx Shared Status & Control) error status register:
 579  * 31:  Indicates an address error when accessed to internal memory
 580  *      uCode/driver must write "1" in order to clear this flag
 581  * 30:  Indicates that Host did not send the expected number of dwords to FH
 582  *      uCode/driver must write "1" in order to clear this flag
 583  * 16-9:Each status bit is for one channel. Indicates that an (Error) ActDMA
 584  *      command was received from the scheduler while the TRB was already full
 585  *      with previous command
 586  *      uCode/driver must write "1" in order to clear this flag
 587  * 7-0: Each status bit indicates a channel's TxCredit error. When an error
 588  *      bit is set, it indicates that the FH has received a full indication
 589  *      from the RTC TxFIFO and the current value of the TxCredit counter was
 590  *      not equal to zero. This mean that the credit mechanism was not
 591  *      synchronized to the TxFIFO status
 592  *      uCode/driver must write "1" in order to clear this flag
 593  */
 594 #define FH_TSSR_TX_ERROR_REG            (FH_TSSR_LOWER_BOUND + 0x018)
 595 #define FH_TSSR_TX_MSG_CONFIG_REG       (FH_TSSR_LOWER_BOUND + 0x008)
 596 
 597 #define FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) ((1 << (_chnl)) << 16)
 598 
 599 /* Tx service channels */
 600 #define FH_SRVC_CHNL            (9)
 601 #define FH_SRVC_LOWER_BOUND     (FH_MEM_LOWER_BOUND + 0x9C8)
 602 #define FH_SRVC_UPPER_BOUND     (FH_MEM_LOWER_BOUND + 0x9D0)
 603 #define FH_SRVC_CHNL_SRAM_ADDR_REG(_chnl) \
 604                 (FH_SRVC_LOWER_BOUND + ((_chnl) - 9) * 0x4)
 605 
 606 #define FH_TX_CHICKEN_BITS_REG  (FH_MEM_LOWER_BOUND + 0xE98)
 607 #define FH_TX_TRB_REG(_chan)    (FH_MEM_LOWER_BOUND + 0x958 + (_chan) * 4)
 608 
 609 /* Instruct FH to increment the retry count of a packet when
 610  * it is brought from the memory to TX-FIFO
 611  */
 612 #define FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN    (0x00000002)
 613 
 614 #define MQ_RX_TABLE_SIZE        512
 615 #define MQ_RX_TABLE_MASK        (MQ_RX_TABLE_SIZE - 1)
 616 #define MQ_RX_NUM_RBDS          (MQ_RX_TABLE_SIZE - 1)
 617 #define RX_POOL_SIZE            (MQ_RX_NUM_RBDS +       \
 618                                  IWL_MAX_RX_HW_QUEUES * \
 619                                  (RX_CLAIM_REQ_ALLOC - RX_POST_REQ_ALLOC))
 620 /* cb size is the exponent */
 621 #define RX_QUEUE_CB_SIZE(x)     ilog2(x)
 622 
 623 #define RX_QUEUE_SIZE                         256
 624 #define RX_QUEUE_MASK                         255
 625 #define RX_QUEUE_SIZE_LOG                     8
 626 
 627 /**
 628  * struct iwl_rb_status - reserve buffer status
 629  *      host memory mapped FH registers
 630  * @closed_rb_num [0:11] - Indicates the index of the RB which was closed
 631  * @closed_fr_num [0:11] - Indicates the index of the RX Frame which was closed
 632  * @finished_rb_num [0:11] - Indicates the index of the current RB
 633  *      in which the last frame was written to
 634  * @finished_fr_num [0:11] - Indicates the index of the RX Frame
 635  *      which was transferred
 636  */
 637 struct iwl_rb_status {
 638         __le16 closed_rb_num;
 639         __le16 closed_fr_num;
 640         __le16 finished_rb_num;
 641         __le16 finished_fr_nam;
 642         __le32 __unused;
 643 } __packed;
 644 
 645 
 646 #define TFD_QUEUE_SIZE_MAX      (256)
 647 #define TFD_QUEUE_SIZE_MAX_GEN3 (65536)
 648 /* cb size is the exponent - 3 */
 649 #define TFD_QUEUE_CB_SIZE(x)    (ilog2(x) - 3)
 650 #define TFD_QUEUE_SIZE_BC_DUP   (64)
 651 #define TFD_QUEUE_BC_SIZE       (TFD_QUEUE_SIZE_MAX + TFD_QUEUE_SIZE_BC_DUP)
 652 #define TFD_QUEUE_BC_SIZE_GEN3  (TFD_QUEUE_SIZE_MAX_GEN3 + \
 653                                  TFD_QUEUE_SIZE_BC_DUP)
 654 #define IWL_TX_DMA_MASK        DMA_BIT_MASK(36)
 655 #define IWL_NUM_OF_TBS          20
 656 #define IWL_TFH_NUM_TBS         25
 657 
 658 static inline u8 iwl_get_dma_hi_addr(dma_addr_t addr)
 659 {
 660         return (sizeof(addr) > sizeof(u32) ? upper_32_bits(addr) : 0) & 0xF;
 661 }
 662 
 663 /**
 664  * enum iwl_tfd_tb_hi_n_len - TB hi_n_len bits
 665  * @TB_HI_N_LEN_ADDR_HI_MSK: high 4 bits (to make it 36) of DMA address
 666  * @TB_HI_N_LEN_LEN_MSK: length of the TB
 667  */
 668 enum iwl_tfd_tb_hi_n_len {
 669         TB_HI_N_LEN_ADDR_HI_MSK = 0xf,
 670         TB_HI_N_LEN_LEN_MSK     = 0xfff0,
 671 };
 672 
 673 /**
 674  * struct iwl_tfd_tb transmit buffer descriptor within transmit frame descriptor
 675  *
 676  * This structure contains dma address and length of transmission address
 677  *
 678  * @lo: low [31:0] portion of the dma address of TX buffer
 679  *      every even is unaligned on 16 bit boundary
 680  * @hi_n_len: &enum iwl_tfd_tb_hi_n_len
 681  */
 682 struct iwl_tfd_tb {
 683         __le32 lo;
 684         __le16 hi_n_len;
 685 } __packed;
 686 
 687 /**
 688  * struct iwl_tfh_tb transmit buffer descriptor within transmit frame descriptor
 689  *
 690  * This structure contains dma address and length of transmission address
 691  *
 692  * @tb_len length of the tx buffer
 693  * @addr 64 bits dma address
 694  */
 695 struct iwl_tfh_tb {
 696         __le16 tb_len;
 697         __le64 addr;
 698 } __packed;
 699 
 700 /**
 701  * Each Tx queue uses a circular buffer of 256 TFDs stored in host DRAM.
 702  * Both driver and device share these circular buffers, each of which must be
 703  * contiguous 256 TFDs.
 704  * For pre 22000 HW it is 256 x 128 bytes-per-TFD = 32 KBytes
 705  * For 22000 HW and on it is 256 x 256 bytes-per-TFD = 65 KBytes
 706  *
 707  * Driver must indicate the physical address of the base of each
 708  * circular buffer via the FH_MEM_CBBC_QUEUE registers.
 709  *
 710  * Each TFD contains pointer/size information for up to 20 / 25 data buffers
 711  * in host DRAM.  These buffers collectively contain the (one) frame described
 712  * by the TFD.  Each buffer must be a single contiguous block of memory within
 713  * itself, but buffers may be scattered in host DRAM.  Each buffer has max size
 714  * of (4K - 4).  The concatenates all of a TFD's buffers into a single
 715  * Tx frame, up to 8 KBytes in size.
 716  *
 717  * A maximum of 255 (not 256!) TFDs may be on a queue waiting for Tx.
 718  */
 719 
 720 /**
 721  * struct iwl_tfd - Transmit Frame Descriptor (TFD)
 722  * @ __reserved1[3] reserved
 723  * @ num_tbs 0-4 number of active tbs
 724  *           5   reserved
 725  *           6-7 padding (not used)
 726  * @ tbs[20]    transmit frame buffer descriptors
 727  * @ __pad      padding
 728  */
 729 struct iwl_tfd {
 730         u8 __reserved1[3];
 731         u8 num_tbs;
 732         struct iwl_tfd_tb tbs[IWL_NUM_OF_TBS];
 733         __le32 __pad;
 734 } __packed;
 735 
 736 /**
 737  * struct iwl_tfh_tfd - Transmit Frame Descriptor (TFD)
 738  * @ num_tbs 0-4 number of active tbs
 739  *           5 -15   reserved
 740  * @ tbs[25]    transmit frame buffer descriptors
 741  * @ __pad      padding
 742  */
 743 struct iwl_tfh_tfd {
 744         __le16 num_tbs;
 745         struct iwl_tfh_tb tbs[IWL_TFH_NUM_TBS];
 746         __le32 __pad;
 747 } __packed;
 748 
 749 /* Keep Warm Size */
 750 #define IWL_KW_SIZE 0x1000      /* 4k */
 751 
 752 /* Fixed (non-configurable) rx data from phy */
 753 
 754 /**
 755  * struct iwlagn_schedq_bc_tbl scheduler byte count table
 756  *      base physical address provided by SCD_DRAM_BASE_ADDR
 757  * For devices up to 22000:
 758  * @tfd_offset  0-12 - tx command byte count
 759  *              12-16 - station index
 760  * For 22000:
 761  * @tfd_offset  0-12 - tx command byte count
 762  *              12-13 - number of 64 byte chunks
 763  *              14-16 - reserved
 764  */
 765 struct iwlagn_scd_bc_tbl {
 766         __le16 tfd_offset[TFD_QUEUE_BC_SIZE];
 767 } __packed;
 768 
 769 /**
 770  * struct iwl_gen3_bc_tbl scheduler byte count table gen3
 771  * For 22560 and on:
 772  * @tfd_offset: 0-12 - tx command byte count
 773  *              12-13 - number of 64 byte chunks
 774  *              14-16 - reserved
 775  */
 776 struct iwl_gen3_bc_tbl {
 777         __le16 tfd_offset[TFD_QUEUE_BC_SIZE_GEN3];
 778 } __packed;
 779 
 780 #endif /* !__iwl_fh_h__ */

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