/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ /* * Copyright (C) 2005-2014, 2018-2021, 2023 Intel Corporation * Copyright (C) 2015-2017 Intel Deutschland GmbH */ #ifndef __iwl_fh_h__ #define __iwl_fh_h__ #include <linux/types.h> #include <linux/bitfield.h> #include "iwl-trans.h" /****************************/ /* Flow Handler Definitions */ /****************************/ /** * This I/O area is directly read/writable by driver (e.g. Linux uses writel()) * Addresses are offsets from device's PCI hardware base address. */ #define FH_MEM_LOWER_BOUND (0x1000) #define FH_MEM_UPPER_BOUND (0x2000) #define FH_MEM_LOWER_BOUND_GEN2 (0xa06000) #define FH_MEM_UPPER_BOUND_GEN2 (0xa08000) /** * Keep-Warm (KW) buffer base address. * * Driver must allocate a 4KByte buffer that is for keeping the * host DRAM powered on (via dummy accesses to DRAM) to maintain low-latency * DRAM access when doing Txing or Rxing. The dummy accesses prevent host * from going into a power-savings mode that would cause higher DRAM latency, * and possible data over/under-runs, before all Tx/Rx is complete. * * Driver loads FH_KW_MEM_ADDR_REG with the physical address (bits 35:4) * of the buffer, which must be 4K aligned. Once this is set up, the device * automatically invokes keep-warm accesses when normal accesses might not * be sufficient to maintain fast DRAM response. * * Bit fields: * 31-0: Keep-warm buffer physical base address [35:4], must be 4K aligned */ #define FH_KW_MEM_ADDR_REG (FH_MEM_LOWER_BOUND + 0x97C) /** * TFD Circular Buffers Base (CBBC) addresses * * Device has 16 base pointer registers, one for each of 16 host-DRAM-resident * circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs) * (see struct iwl_tfd_frame). These 16 pointer registers are offset by 0x04 * bytes from one another. Each TFD circular buffer in DRAM must be 256-byte * aligned (address bits 0-7 must be 0). * Later devices have 20 (5000 series) or 30 (higher) queues, but the registers * for them are in different places. * * Bit fields in each pointer register: * 27-0: TFD CB physical base address [35:8], must be 256-byte aligned */ #define FH_MEM_CBBC_0_15_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0) #define FH_MEM_CBBC_0_15_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xA10) #define FH_MEM_CBBC_16_19_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBF0) #define FH_MEM_CBBC_16_19_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00) #define FH_MEM_CBBC_20_31_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xB20) #define FH_MEM_CBBC_20_31_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xB80) /* 22000 TFD table address, 64 bit */ #define TFH_TFDQ_CBB_TABLE (0x1C00) /* Find TFD CB base pointer for given queue */ static inline unsigned int FH_MEM_CBBC_QUEUE(struct iwl_trans *trans, unsigned int chnl) { if (trans->trans_cfg->gen2) { WARN_ON_ONCE(chnl >= 64); return TFH_TFDQ_CBB_TABLE + 8 * chnl; } if (chnl < 16) return FH_MEM_CBBC_0_15_LOWER_BOUND + 4 * chnl; if (chnl < 20) return FH_MEM_CBBC_16_19_LOWER_BOUND + 4 * (chnl - 16); WARN_ON_ONCE(chnl >= 32); return FH_MEM_CBBC_20_31_LOWER_BOUND + 4 * (chnl - 20); } /* 22000 configuration registers */ /* * TFH Configuration register. * * BIT fields: * * Bits 3:0: * Define the maximum number of pending read requests. * Maximum configuration value allowed is 0xC * Bits 9:8: * Define the maximum transfer size. (64 / 128 / 256) * Bit 10: * When bit is set and transfer size is set to 128B, the TFH will enable * reading chunks of more than 64B only if the read address is aligned to 128B. * In case of DRAM read address which is not aligned to 128B, the TFH will * enable transfer size which doesn't cross 64B DRAM address boundary. */ #define TFH_TRANSFER_MODE (0x1F40) #define TFH_TRANSFER_MAX_PENDING_REQ 0xc #define TFH_CHUNK_SIZE_128 BIT(8) #define TFH_CHUNK_SPLIT_MODE BIT(10) /* * Defines the offset address in dwords referring from the beginning of the * Tx CMD which will be updated in DRAM. * Note that the TFH offset address for Tx CMD update is always referring to * the start of the TFD first TB. * In case of a DRAM Tx CMD update the TFH will update PN and Key ID */ #define TFH_TXCMD_UPDATE_CFG (0x1F48) /* * Controls TX DMA operation * * BIT fields: * * Bits 31:30: Enable the SRAM DMA channel. * Turning on bit 31 will kick the SRAM2DRAM DMA. * Note that the sram2dram may be enabled only after configuring the DRAM and * SRAM addresses registers and the byte count register. * Bits 25:24: Defines the interrupt target upon dram2sram transfer done. When * set to 1 - interrupt is sent to the driver * Bit 0: Indicates the snoop configuration */ #define TFH_SRV_DMA_CHNL0_CTRL (0x1F60) #define TFH_SRV_DMA_SNOOP BIT(0) #define TFH_SRV_DMA_TO_DRIVER BIT(24) #define TFH_SRV_DMA_START BIT(31) /* Defines the DMA SRAM write start address to transfer a data block */ #define TFH_SRV_DMA_CHNL0_SRAM_ADDR (0x1F64) /* Defines the 64bits DRAM start address to read the DMA data block from */ #define TFH_SRV_DMA_CHNL0_DRAM_ADDR (0x1F68) /* * Defines the number of bytes to transfer from DRAM to SRAM. * Note that this register may be configured with non-dword aligned size. */ #define TFH_SRV_DMA_CHNL0_BC (0x1F70) /** * Rx SRAM Control and Status Registers (RSCSR) * * These registers provide handshake between driver and device for the Rx queue * (this queue handles *all* command responses, notifications, Rx data, etc. * sent from uCode to host driver). Unlike Tx, there is only one Rx * queue, and only one Rx DMA/FIFO channel. Also unlike Tx, which can * concatenate up to 20 DRAM buffers to form a Tx frame, each Receive Buffer * Descriptor (RBD) points to only one Rx Buffer (RB); there is a 1:1 * mapping between RBDs and RBs. * * Driver must allocate host DRAM memory for the following, and set the * physical address of each into device registers: * * 1) Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256 * entries (although any power of 2, up to 4096, is selectable by driver). * Each entry (1 dword) points to a receive buffer (RB) of consistent size * (typically 4K, although 8K or 16K are also selectable by driver). * Driver sets up RB size and number of RBDs in the CB via Rx config * register FH_MEM_RCSR_CHNL0_CONFIG_REG. * * Bit fields within one RBD: * 27-0: Receive Buffer physical address bits [35:8], 256-byte aligned * * Driver sets physical address [35:8] of base of RBD circular buffer * into FH_RSCSR_CHNL0_RBDCB_BASE_REG [27:0]. * * 2) Rx status buffer, 8 bytes, in which uCode indicates which Rx Buffers * (RBs) have been filled, via a "write pointer", actually the index of * the RB's corresponding RBD within the circular buffer. Driver sets * physical address [35:4] into FH_RSCSR_CHNL0_STTS_WPTR_REG [31:0]. * * Bit fields in lower dword of Rx status buffer (upper dword not used * by driver: * 31-12: Not used by driver * 11- 0: Index of last filled Rx buffer descriptor * (device writes, driver reads this value) * * As the driver prepares Receive Buffers (RBs) for device to fill, driver must * enter pointers to these RBs into contiguous RBD circular buffer entries, * and update the device's "write" index register, * FH_RSCSR_CHNL0_RBDCB_WPTR_REG. * * This "write" index corresponds to the *next* RBD that the driver will make * available, i.e. one RBD past the tail of the ready-to-fill RBDs within * the circular buffer. This value should initially be 0 (before preparing any * RBs), should be 8 after preparing the first 8 RBs (for example), and must * wrap back to 0 at the end of the circular buffer (but don't wrap before * "read" index has advanced past 1! See below). * NOTE: DEVICE EXPECTS THE WRITE INDEX TO BE INCREMENTED IN MULTIPLES OF 8. * * As the device fills RBs (referenced from contiguous RBDs within the circular * buffer), it updates the Rx status buffer in host DRAM, 2) described above, * to tell the driver the index of the latest filled RBD. The driver must * read this "read" index from DRAM after receiving an Rx interrupt from device * * The driver must also internally keep track of a third index, which is the * next RBD to process. When receiving an Rx interrupt, driver should process * all filled but unprocessed RBs up to, but not including, the RB * corresponding to the "read" index. For example, if "read" index becomes "1", * driver may process the RB pointed to by RBD 0. Depending on volume of * traffic, there may be many RBs to process. * * If read index == write index, device thinks there is no room to put new data. * Due to this, the maximum number of filled RBs is 255, instead of 256. To * be safe, make sure that there is a gap of at least 2 RBDs between "write" * and "read" indexes; that is, make sure that there are no more than 254 * buffers waiting to be filled. */ #define FH_MEM_RSCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBC0) #define FH_MEM_RSCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00) #define FH_MEM_RSCSR_CHNL0 (FH_MEM_RSCSR_LOWER_BOUND) /** * Physical base address of 8-byte Rx Status buffer. * Bit fields: * 31-0: Rx status buffer physical base address [35:4], must 16-byte aligned. */ #define FH_RSCSR_CHNL0_STTS_WPTR_REG (FH_MEM_RSCSR_CHNL0) /** * Physical base address of Rx Buffer Descriptor Circular Buffer. * Bit fields: * 27-0: RBD CD physical base address [35:8], must be 256-byte aligned. */ #define FH_RSCSR_CHNL0_RBDCB_BASE_REG (FH_MEM_RSCSR_CHNL0 + 0x004) /** * Rx write pointer (index, really!). * Bit fields: * 11-0: Index of driver's most recent prepared-to-be-filled RBD, + 1. * NOTE: For 256-entry circular buffer, use only bits [7:0]. */ #define FH_RSCSR_CHNL0_RBDCB_WPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x008) #define FH_RSCSR_CHNL0_WPTR (FH_RSCSR_CHNL0_RBDCB_WPTR_REG) #define FW_RSCSR_CHNL0_RXDCB_RDPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x00c) #define FH_RSCSR_CHNL0_RDPTR FW_RSCSR_CHNL0_RXDCB_RDPTR_REG /** * Rx Config/Status Registers (RCSR) * Rx Config Reg for channel 0 (only channel used) * * Driver must initialize FH_MEM_RCSR_CHNL0_CONFIG_REG as follows for * normal operation (see bit fields). * * Clearing FH_MEM_RCSR_CHNL0_CONFIG_REG to 0 turns off Rx DMA. * Driver should poll FH_MEM_RSSR_RX_STATUS_REG for * FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (bit 24) before continuing. * * Bit fields: * 31-30: Rx DMA channel enable: '00' off/pause, '01' pause at end of frame, * '10' operate normally * 29-24: reserved * 23-20: # RBDs in circular buffer = 2^value; use "8" for 256 RBDs (normal), * min "5" for 32 RBDs, max "12" for 4096 RBDs. * 19-18: reserved * 17-16: size of each receive buffer; '00' 4K (normal), '01' 8K, * '10' 12K, '11' 16K. * 15-14: reserved * 13-12: IRQ destination; '00' none, '01' host driver (normal operation) * 11- 4: timeout for closing Rx buffer and interrupting host (units 32 usec) * typical value 0x10 (about 1/2 msec) * 3- 0: reserved */ #define FH_MEM_RCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC00) #define FH_MEM_RCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xCC0) #define FH_MEM_RCSR_CHNL0 (FH_MEM_RCSR_LOWER_BOUND) #define FH_MEM_RCSR_CHNL0_CONFIG_REG (FH_MEM_RCSR_CHNL0) #define FH_MEM_RCSR_CHNL0_RBDCB_WPTR (FH_MEM_RCSR_CHNL0 + 0x8) #define FH_MEM_RCSR_CHNL0_FLUSH_RB_REQ (FH_MEM_RCSR_CHNL0 + 0x10) #define FH_RCSR_CHNL0_RX_CONFIG_RB_TIMEOUT_MSK (0x00000FF0) /* bits 4-11 */ #define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_MSK (0x00001000) /* bits 12 */ #define FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK (0x00008000) /* bit 15 */ #define FH_RCSR_CHNL0_RX_CONFIG_RB_SIZE_MSK (0x00030000) /* bits 16-17 */ #define FH_RCSR_CHNL0_RX_CONFIG_RBDBC_SIZE_MSK (0x00F00000) /* bits 20-23 */ #define FH_RCSR_CHNL0_RX_CONFIG_DMA_CHNL_EN_MSK (0xC0000000) /* bits 30-31*/ #define FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS (20) #define FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS (4) #define RX_RB_TIMEOUT (0x11) #define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_VAL (0x00000000) #define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_EOF_VAL (0x40000000) #define FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL (0x80000000) #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K (0x00000000) #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K (0x00010000) #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K (0x00020000) #define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_16K (0x00030000) #define FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY (0x00000004) #define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_NO_INT_VAL (0x00000000) #define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL (0x00001000) /** * Rx Shared Status Registers (RSSR) * * After stopping Rx DMA channel (writing 0 to * FH_MEM_RCSR_CHNL0_CONFIG_REG), driver must poll * FH_MEM_RSSR_RX_STATUS_REG until Rx channel is idle. * * Bit fields: * 24: 1 = Channel 0 is idle * * FH_MEM_RSSR_SHARED_CTRL_REG and FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV * contain default values that should not be altered by the driver. */ #define FH_MEM_RSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC40) #define FH_MEM_RSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xD00) #define FH_MEM_RSSR_SHARED_CTRL_REG (FH_MEM_RSSR_LOWER_BOUND) #define FH_MEM_RSSR_RX_STATUS_REG (FH_MEM_RSSR_LOWER_BOUND + 0x004) #define FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV\ (FH_MEM_RSSR_LOWER_BOUND + 0x008) #define FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (0x01000000) #define FH_MEM_TFDIB_REG1_ADDR_BITSHIFT 28 #define FH_MEM_TB_MAX_LENGTH (0x00020000) /* 9000 rx series registers */ #define RFH_Q0_FRBDCB_BA_LSB 0xA08000 /* 64 bit address */ #define RFH_Q_FRBDCB_BA_LSB(q) (RFH_Q0_FRBDCB_BA_LSB + (q) * 8) /* Write index table */ #define RFH_Q0_FRBDCB_WIDX 0xA08080 #define RFH_Q_FRBDCB_WIDX(q) (RFH_Q0_FRBDCB_WIDX + (q) * 4) /* Write index table - shadow registers */ #define RFH_Q0_FRBDCB_WIDX_TRG 0x1C80 #define RFH_Q_FRBDCB_WIDX_TRG(q) (RFH_Q0_FRBDCB_WIDX_TRG + (q) * 4) /* Read index table */ #define RFH_Q0_FRBDCB_RIDX 0xA080C0 #define RFH_Q_FRBDCB_RIDX(q) (RFH_Q0_FRBDCB_RIDX + (q) * 4) /* Used list table */ #define RFH_Q0_URBDCB_BA_LSB 0xA08100 /* 64 bit address */ #define RFH_Q_URBDCB_BA_LSB(q) (RFH_Q0_URBDCB_BA_LSB + (q) * 8) /* Write index table */ #define RFH_Q0_URBDCB_WIDX 0xA08180 #define RFH_Q_URBDCB_WIDX(q) (RFH_Q0_URBDCB_WIDX + (q) * 4) #define RFH_Q0_URBDCB_VAID 0xA081C0 #define RFH_Q_URBDCB_VAID(q) (RFH_Q0_URBDCB_VAID + (q) * 4) /* stts */ #define RFH_Q0_URBD_STTS_WPTR_LSB 0xA08200 /*64 bits address */ #define RFH_Q_URBD_STTS_WPTR_LSB(q) (RFH_Q0_URBD_STTS_WPTR_LSB + (q) * 8) #define RFH_Q0_ORB_WPTR_LSB 0xA08280 #define RFH_Q_ORB_WPTR_LSB(q) (RFH_Q0_ORB_WPTR_LSB + (q) * 8) #define RFH_RBDBUF_RBD0_LSB 0xA08300 #define RFH_RBDBUF_RBD_LSB(q) (RFH_RBDBUF_RBD0_LSB + (q) * 8) /** * RFH Status Register * * Bit fields: * * Bit 29: RBD_FETCH_IDLE * This status flag is set by the RFH when there is no active RBD fetch from * DRAM. * Once the RFH RBD controller starts fetching (or when there is a pending * RBD read response from DRAM), this flag is immediately turned off. * * Bit 30: SRAM_DMA_IDLE * This status flag is set by the RFH when there is no active transaction from * SRAM to DRAM. * Once the SRAM to DRAM DMA is active, this flag is immediately turned off. * * Bit 31: RXF_DMA_IDLE * This status flag is set by the RFH when there is no active transaction from * RXF to DRAM. * Once the RXF-to-DRAM DMA is active, this flag is immediately turned off. */ #define RFH_GEN_STATUS 0xA09808 #define RFH_GEN_STATUS_GEN3 0xA07824 #define RBD_FETCH_IDLE BIT(29) #define SRAM_DMA_IDLE BIT(30) #define RXF_DMA_IDLE BIT(31) /* DMA configuration */ #define RFH_RXF_DMA_CFG 0xA09820 #define RFH_RXF_DMA_CFG_GEN3 0xA07880 /* RB size */ #define RFH_RXF_DMA_RB_SIZE_MASK (0x000F0000) /* bits 16-19 */ #define RFH_RXF_DMA_RB_SIZE_POS 16 #define RFH_RXF_DMA_RB_SIZE_1K (0x1 << RFH_RXF_DMA_RB_SIZE_POS) #define RFH_RXF_DMA_RB_SIZE_2K (0x2 << RFH_RXF_DMA_RB_SIZE_POS) #define RFH_RXF_DMA_RB_SIZE_4K (0x4 << RFH_RXF_DMA_RB_SIZE_POS) #define RFH_RXF_DMA_RB_SIZE_8K (0x8 << RFH_RXF_DMA_RB_SIZE_POS) #define RFH_RXF_DMA_RB_SIZE_12K (0x9 << RFH_RXF_DMA_RB_SIZE_POS) #define RFH_RXF_DMA_RB_SIZE_16K (0xA << RFH_RXF_DMA_RB_SIZE_POS) #define RFH_RXF_DMA_RB_SIZE_20K (0xB << RFH_RXF_DMA_RB_SIZE_POS) #define RFH_RXF_DMA_RB_SIZE_24K (0xC << RFH_RXF_DMA_RB_SIZE_POS) #define RFH_RXF_DMA_RB_SIZE_28K (0xD << RFH_RXF_DMA_RB_SIZE_POS) #define RFH_RXF_DMA_RB_SIZE_32K (0xE << RFH_RXF_DMA_RB_SIZE_POS) /* RB Circular Buffer size:defines the table sizes in RBD units */ #define RFH_RXF_DMA_RBDCB_SIZE_MASK (0x00F00000) /* bits 20-23 */ #define RFH_RXF_DMA_RBDCB_SIZE_POS 20 #define RFH_RXF_DMA_RBDCB_SIZE_8 (0x3 << RFH_RXF_DMA_RBDCB_SIZE_POS) #define RFH_RXF_DMA_RBDCB_SIZE_16 (0x4 << RFH_RXF_DMA_RBDCB_SIZE_POS) #define RFH_RXF_DMA_RBDCB_SIZE_32 (0x5 << RFH_RXF_DMA_RBDCB_SIZE_POS) #define RFH_RXF_DMA_RBDCB_SIZE_64 (0x7 << RFH_RXF_DMA_RBDCB_SIZE_POS) #define RFH_RXF_DMA_RBDCB_SIZE_128 (0x7 << RFH_RXF_DMA_RBDCB_SIZE_POS) #define RFH_RXF_DMA_RBDCB_SIZE_256 (0x8 << RFH_RXF_DMA_RBDCB_SIZE_POS) #define RFH_RXF_DMA_RBDCB_SIZE_512 (0x9 << RFH_RXF_DMA_RBDCB_SIZE_POS) #define RFH_RXF_DMA_RBDCB_SIZE_1024 (0xA << RFH_RXF_DMA_RBDCB_SIZE_POS) #define RFH_RXF_DMA_RBDCB_SIZE_2048 (0xB << RFH_RXF_DMA_RBDCB_SIZE_POS) #define RFH_RXF_DMA_MIN_RB_SIZE_MASK (0x03000000) /* bit 24-25 */ #define RFH_RXF_DMA_MIN_RB_SIZE_POS 24 #define RFH_RXF_DMA_MIN_RB_4_8 (3 << RFH_RXF_DMA_MIN_RB_SIZE_POS) #define RFH_RXF_DMA_DROP_TOO_LARGE_MASK (0x04000000) /* bit 26 */ #define RFH_RXF_DMA_SINGLE_FRAME_MASK (0x20000000) /* bit 29 */ #define RFH_DMA_EN_MASK (0xC0000000) /* bits 30-31*/ #define RFH_DMA_EN_ENABLE_VAL BIT(31) #define RFH_RXF_RXQ_ACTIVE 0xA0980C #define RFH_GEN_CFG 0xA09800 #define RFH_GEN_CFG_SERVICE_DMA_SNOOP BIT(0) #define RFH_GEN_CFG_RFH_DMA_SNOOP BIT(1) #define RFH_GEN_CFG_RB_CHUNK_SIZE BIT(4) #define RFH_GEN_CFG_RB_CHUNK_SIZE_128 1 #define RFH_GEN_CFG_RB_CHUNK_SIZE_64 0 /* the driver assumes everywhere that the default RXQ is 0 */ #define RFH_GEN_CFG_DEFAULT_RXQ_NUM 0xF00 #define RFH_GEN_CFG_VAL(_n, _v) FIELD_PREP(RFH_GEN_CFG_ ## _n, _v) /* end of 9000 rx series registers */ /* TFDB Area - TFDs buffer table */ #define FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK (0xFFFFFFFF) #define FH_TFDIB_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x900) #define FH_TFDIB_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0x958) #define FH_TFDIB_CTRL0_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl)) #define FH_TFDIB_CTRL1_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl) + 0x4) /** * Transmit DMA Channel Control/Status Registers (TCSR) * * Device has one configuration register for each of 8 Tx DMA/FIFO channels * supported in hardware (don't confuse these with the 16 Tx queues in DRAM, * which feed the DMA/FIFO channels); config regs are separated by 0x20 bytes. * * To use a Tx DMA channel, driver must initialize its * FH_TCSR_CHNL_TX_CONFIG_REG(chnl) with: * * FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | * FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL * * All other bits should be 0. * * Bit fields: * 31-30: Tx DMA channel enable: '00' off/pause, '01' pause at end of frame, * '10' operate normally * 29- 4: Reserved, set to "0" * 3: Enable internal DMA requests (1, normal operation), disable (0) * 2- 0: Reserved, set to "0" */ #define FH_TCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xD00) #define FH_TCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xE60) /* Find Control/Status reg for given Tx DMA/FIFO channel */ #define FH_TCSR_CHNL_NUM (8) /* TCSR: tx_config register values */ #define FH_TCSR_CHNL_TX_CONFIG_REG(_chnl) \ (FH_TCSR_LOWER_BOUND + 0x20 * (_chnl)) #define FH_TCSR_CHNL_TX_CREDIT_REG(_chnl) \ (FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x4) #define FH_TCSR_CHNL_TX_BUF_STS_REG(_chnl) \ (FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x8) #define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF (0x00000000) #define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_DRV (0x00000001) #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE (0x00000000) #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE (0x00000008) #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_NOINT (0x00000000) #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD (0x00100000) #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD (0x00200000) #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT (0x00000000) #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_ENDTFD (0x00400000) #define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_IFTFD (0x00800000) #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE (0x00000000) #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE_EOF (0x40000000) #define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE (0x80000000) #define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_EMPTY (0x00000000) #define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_WAIT (0x00002000) #define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID (0x00000003) #define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM (20) #define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX (12) /** * Tx Shared Status Registers (TSSR) * * After stopping Tx DMA channel (writing 0 to * FH_TCSR_CHNL_TX_CONFIG_REG(chnl)), driver must poll * FH_TSSR_TX_STATUS_REG until selected Tx channel is idle * (channel's buffers empty | no pending requests). * * Bit fields: * 31-24: 1 = Channel buffers empty (channel 7:0) * 23-16: 1 = No pending requests (channel 7:0) */ #define FH_TSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xEA0) #define FH_TSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xEC0) #define FH_TSSR_TX_STATUS_REG (FH_TSSR_LOWER_BOUND + 0x010) /** * Bit fields for TSSR(Tx Shared Status & Control) error status register: * 31: Indicates an address error when accessed to internal memory * uCode/driver must write "1" in order to clear this flag * 30: Indicates that Host did not send the expected number of dwords to FH * uCode/driver must write "1" in order to clear this flag * 16-9:Each status bit is for one channel. Indicates that an (Error) ActDMA * command was received from the scheduler while the TRB was already full * with previous command * uCode/driver must write "1" in order to clear this flag * 7-0: Each status bit indicates a channel's TxCredit error. When an error * bit is set, it indicates that the FH has received a full indication * from the RTC TxFIFO and the current value of the TxCredit counter was * not equal to zero. This mean that the credit mechanism was not * synchronized to the TxFIFO status * uCode/driver must write "1" in order to clear this flag */ #define FH_TSSR_TX_ERROR_REG (FH_TSSR_LOWER_BOUND + 0x018) #define FH_TSSR_TX_MSG_CONFIG_REG (FH_TSSR_LOWER_BOUND + 0x008) #define FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) ((1 << (_chnl)) << 16) /* Tx service channels */ #define FH_SRVC_CHNL (9) #define FH_SRVC_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9C8) #define FH_SRVC_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0) #define FH_SRVC_CHNL_SRAM_ADDR_REG(_chnl) \ (FH_SRVC_LOWER_BOUND + ((_chnl) - 9) * 0x4) #define FH_TX_CHICKEN_BITS_REG (FH_MEM_LOWER_BOUND + 0xE98) #define FH_TX_TRB_REG(_chan) (FH_MEM_LOWER_BOUND + 0x958 + (_chan) * 4) /* Instruct FH to increment the retry count of a packet when * it is brought from the memory to TX-FIFO */ #define FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN (0x00000002) #define RX_POOL_SIZE(rbds) ((rbds) - 1 + \ IWL_MAX_RX_HW_QUEUES * \ (RX_CLAIM_REQ_ALLOC - RX_POST_REQ_ALLOC)) /* cb size is the exponent */ #define RX_QUEUE_CB_SIZE(x) ilog2(x) #define RX_QUEUE_SIZE 256 #define RX_QUEUE_MASK 255 #define RX_QUEUE_SIZE_LOG 8 #define IWL_DEFAULT_RX_QUEUE 0 /** * struct iwl_rb_status - reserve buffer status * host memory mapped FH registers * @closed_rb_num [0:11] - Indicates the index of the RB which was closed * @closed_fr_num [0:11] - Indicates the index of the RX Frame which was closed * @finished_rb_num [0:11] - Indicates the index of the current RB * in which the last frame was written to * @finished_fr_num [0:11] - Indicates the index of the RX Frame * which was transferred */ struct iwl_rb_status { __le16 closed_rb_num; __le16 closed_fr_num; __le16 finished_rb_num; __le16 finished_fr_nam; __le32 __spare; } __packed; #define TFD_QUEUE_SIZE_MAX (256) #define TFD_QUEUE_SIZE_MAX_GEN3 (65536) /* cb size is the exponent - 3 */ #define TFD_QUEUE_CB_SIZE(x) (ilog2(x) - 3) #define TFD_QUEUE_SIZE_BC_DUP (64) #define TFD_QUEUE_BC_SIZE (TFD_QUEUE_SIZE_MAX + TFD_QUEUE_SIZE_BC_DUP) #define TFD_QUEUE_BC_SIZE_GEN3_AX210 1024 #define TFD_QUEUE_BC_SIZE_GEN3_BZ (1024 * 4) #define IWL_TX_DMA_MASK DMA_BIT_MASK(36) #define IWL_NUM_OF_TBS 20 #define IWL_TFH_NUM_TBS 25 /* IMR DMA registers */ #define IMR_TFH_SRV_DMA_CHNL0_CTRL 0x00a0a51c #define IMR_TFH_SRV_DMA_CHNL0_SRAM_ADDR 0x00a0a520 #define IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_LSB 0x00a0a524 #define IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_MSB 0x00a0a528 #define IMR_TFH_SRV_DMA_CHNL0_BC 0x00a0a52c #define TFH_SRV_DMA_CHNL0_LEFT_BC 0x00a0a530 /* RFH S2D DMA registers */ #define IMR_RFH_GEN_CFG_SERVICE_DMA_RS_MSK 0x0000000c #define IMR_RFH_GEN_CFG_SERVICE_DMA_SNOOP_MSK 0x00000002 /* TFH D2S DMA registers */ #define IMR_UREG_CHICK_HALT_UMAC_PERMANENTLY_MSK 0x80000000 #define IMR_UREG_CHICK 0x00d05c00 #define IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_IRQ_TARGET_POS 0x00800000 #define IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_RS_MSK 0x00000030 #define IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_DMA_EN_POS 0x80000000 static inline u8 iwl_get_dma_hi_addr(dma_addr_t addr) { return (sizeof(addr) > sizeof(u32) ? upper_32_bits(addr) : 0) & 0xF; } /** * enum iwl_tfd_tb_hi_n_len - TB hi_n_len bits * @TB_HI_N_LEN_ADDR_HI_MSK: high 4 bits (to make it 36) of DMA address * @TB_HI_N_LEN_LEN_MSK: length of the TB */ enum iwl_tfd_tb_hi_n_len { TB_HI_N_LEN_ADDR_HI_MSK = 0xf, TB_HI_N_LEN_LEN_MSK = 0xfff0, }; /** * struct iwl_tfd_tb transmit buffer descriptor within transmit frame descriptor * * This structure contains dma address and length of transmission address * * @lo: low [31:0] portion of the dma address of TX buffer * every even is unaligned on 16 bit boundary * @hi_n_len: &enum iwl_tfd_tb_hi_n_len */ struct iwl_tfd_tb { __le32 lo; __le16 hi_n_len; } __packed; /** * struct iwl_tfh_tb transmit buffer descriptor within transmit frame descriptor * * This structure contains dma address and length of transmission address * * @tb_len length of the tx buffer * @addr 64 bits dma address */ struct iwl_tfh_tb { __le16 tb_len; __le64 addr; } __packed; /** * Each Tx queue uses a circular buffer of 256 TFDs stored in host DRAM. * Both driver and device share these circular buffers, each of which must be * contiguous 256 TFDs. * For pre 22000 HW it is 256 x 128 bytes-per-TFD = 32 KBytes * For 22000 HW and on it is 256 x 256 bytes-per-TFD = 65 KBytes * * Driver must indicate the physical address of the base of each * circular buffer via the FH_MEM_CBBC_QUEUE registers. * * Each TFD contains pointer/size information for up to 20 / 25 data buffers * in host DRAM. These buffers collectively contain the (one) frame described * by the TFD. Each buffer must be a single contiguous block of memory within * itself, but buffers may be scattered in host DRAM. Each buffer has max size * of (4K - 4). The concatenates all of a TFD's buffers into a single * Tx frame, up to 8 KBytes in size. * * A maximum of 255 (not 256!) TFDs may be on a queue waiting for Tx. */ /** * struct iwl_tfd - Transmit Frame Descriptor (TFD) * @ __reserved1[3] reserved * @ num_tbs 0-4 number of active tbs * 5 reserved * 6-7 padding (not used) * @ tbs[20] transmit frame buffer descriptors * @ __pad padding */ struct iwl_tfd { u8 __reserved1[3]; u8 num_tbs; struct iwl_tfd_tb tbs[IWL_NUM_OF_TBS]; __le32 __pad; } __packed; /** * struct iwl_tfh_tfd - Transmit Frame Descriptor (TFD) * @ num_tbs 0-4 number of active tbs * 5 -15 reserved * @ tbs[25] transmit frame buffer descriptors * @ __pad padding */ struct iwl_tfh_tfd { __le16 num_tbs; struct iwl_tfh_tb tbs[IWL_TFH_NUM_TBS]; __le32 __pad; } __packed; /* Keep Warm Size */ #define IWL_KW_SIZE 0x1000 /* 4k */ /* Fixed (non-configurable) rx data from phy */ /** * struct iwlagn_schedq_bc_tbl scheduler byte count table * base physical address provided by SCD_DRAM_BASE_ADDR * For devices up to 22000: * @tfd_offset 0-12 - tx command byte count * 12-16 - station index * For 22000: * @tfd_offset 0-12 - tx command byte count * 12-13 - number of 64 byte chunks * 14-16 - reserved */ struct iwlagn_scd_bc_tbl { __le16 tfd_offset[TFD_QUEUE_BC_SIZE]; } __packed; /** * struct iwl_gen3_bc_tbl_entry scheduler byte count table entry gen3 * For AX210 and on: * @tfd_offset: 0-12 - tx command byte count * 12-13 - number of 64 byte chunks * 14-16 - reserved */ struct iwl_gen3_bc_tbl_entry { __le16 tfd_offset; } __packed; #endif /* !__iwl_fh_h__ */