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.
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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 - 2020 Intel Corporation
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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.
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25 * Intel Linux Wireless <linuxwifi@intel.com>
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27 *
28 * BSD LICENSE
29 *
30 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
31 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
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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 */
FH_MEM_CBBC_QUEUE(struct iwl_trans * trans,unsigned int chnl)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 configuration 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 RX_POOL_SIZE(rbds) ((rbds) - 1 + \
615 IWL_MAX_RX_HW_QUEUES * \
616 (RX_CLAIM_REQ_ALLOC - RX_POST_REQ_ALLOC))
617 /* cb size is the exponent */
618 #define RX_QUEUE_CB_SIZE(x) ilog2(x)
619
620 #define RX_QUEUE_SIZE 256
621 #define RX_QUEUE_MASK 255
622 #define RX_QUEUE_SIZE_LOG 8
623
624 /**
625 * struct iwl_rb_status - reserve buffer status
626 * host memory mapped FH registers
627 * @closed_rb_num [0:11] - Indicates the index of the RB which was closed
628 * @closed_fr_num [0:11] - Indicates the index of the RX Frame which was closed
629 * @finished_rb_num [0:11] - Indicates the index of the current RB
630 * in which the last frame was written to
631 * @finished_fr_num [0:11] - Indicates the index of the RX Frame
632 * which was transferred
633 */
634 struct iwl_rb_status {
635 __le16 closed_rb_num;
636 __le16 closed_fr_num;
637 __le16 finished_rb_num;
638 __le16 finished_fr_nam;
639 __le32 __unused;
640 } __packed;
641
642
643 #define TFD_QUEUE_SIZE_MAX (256)
644 #define TFD_QUEUE_SIZE_MAX_GEN3 (65536)
645 /* cb size is the exponent - 3 */
646 #define TFD_QUEUE_CB_SIZE(x) (ilog2(x) - 3)
647 #define TFD_QUEUE_SIZE_BC_DUP (64)
648 #define TFD_QUEUE_BC_SIZE (TFD_QUEUE_SIZE_MAX + TFD_QUEUE_SIZE_BC_DUP)
649 #define TFD_QUEUE_BC_SIZE_GEN3 1024
650 #define IWL_TX_DMA_MASK DMA_BIT_MASK(36)
651 #define IWL_NUM_OF_TBS 20
652 #define IWL_TFH_NUM_TBS 25
653
iwl_get_dma_hi_addr(dma_addr_t addr)654 static inline u8 iwl_get_dma_hi_addr(dma_addr_t addr)
655 {
656 return (sizeof(addr) > sizeof(u32) ? upper_32_bits(addr) : 0) & 0xF;
657 }
658
659 /**
660 * enum iwl_tfd_tb_hi_n_len - TB hi_n_len bits
661 * @TB_HI_N_LEN_ADDR_HI_MSK: high 4 bits (to make it 36) of DMA address
662 * @TB_HI_N_LEN_LEN_MSK: length of the TB
663 */
664 enum iwl_tfd_tb_hi_n_len {
665 TB_HI_N_LEN_ADDR_HI_MSK = 0xf,
666 TB_HI_N_LEN_LEN_MSK = 0xfff0,
667 };
668
669 /**
670 * struct iwl_tfd_tb transmit buffer descriptor within transmit frame descriptor
671 *
672 * This structure contains dma address and length of transmission address
673 *
674 * @lo: low [31:0] portion of the dma address of TX buffer
675 * every even is unaligned on 16 bit boundary
676 * @hi_n_len: &enum iwl_tfd_tb_hi_n_len
677 */
678 struct iwl_tfd_tb {
679 __le32 lo;
680 __le16 hi_n_len;
681 } __packed;
682
683 /**
684 * struct iwl_tfh_tb transmit buffer descriptor within transmit frame descriptor
685 *
686 * This structure contains dma address and length of transmission address
687 *
688 * @tb_len length of the tx buffer
689 * @addr 64 bits dma address
690 */
691 struct iwl_tfh_tb {
692 __le16 tb_len;
693 __le64 addr;
694 } __packed;
695
696 /**
697 * Each Tx queue uses a circular buffer of 256 TFDs stored in host DRAM.
698 * Both driver and device share these circular buffers, each of which must be
699 * contiguous 256 TFDs.
700 * For pre 22000 HW it is 256 x 128 bytes-per-TFD = 32 KBytes
701 * For 22000 HW and on it is 256 x 256 bytes-per-TFD = 65 KBytes
702 *
703 * Driver must indicate the physical address of the base of each
704 * circular buffer via the FH_MEM_CBBC_QUEUE registers.
705 *
706 * Each TFD contains pointer/size information for up to 20 / 25 data buffers
707 * in host DRAM. These buffers collectively contain the (one) frame described
708 * by the TFD. Each buffer must be a single contiguous block of memory within
709 * itself, but buffers may be scattered in host DRAM. Each buffer has max size
710 * of (4K - 4). The concatenates all of a TFD's buffers into a single
711 * Tx frame, up to 8 KBytes in size.
712 *
713 * A maximum of 255 (not 256!) TFDs may be on a queue waiting for Tx.
714 */
715
716 /**
717 * struct iwl_tfd - Transmit Frame Descriptor (TFD)
718 * @ __reserved1[3] reserved
719 * @ num_tbs 0-4 number of active tbs
720 * 5 reserved
721 * 6-7 padding (not used)
722 * @ tbs[20] transmit frame buffer descriptors
723 * @ __pad padding
724 */
725 struct iwl_tfd {
726 u8 __reserved1[3];
727 u8 num_tbs;
728 struct iwl_tfd_tb tbs[IWL_NUM_OF_TBS];
729 __le32 __pad;
730 } __packed;
731
732 /**
733 * struct iwl_tfh_tfd - Transmit Frame Descriptor (TFD)
734 * @ num_tbs 0-4 number of active tbs
735 * 5 -15 reserved
736 * @ tbs[25] transmit frame buffer descriptors
737 * @ __pad padding
738 */
739 struct iwl_tfh_tfd {
740 __le16 num_tbs;
741 struct iwl_tfh_tb tbs[IWL_TFH_NUM_TBS];
742 __le32 __pad;
743 } __packed;
744
745 /* Keep Warm Size */
746 #define IWL_KW_SIZE 0x1000 /* 4k */
747
748 /* Fixed (non-configurable) rx data from phy */
749
750 /**
751 * struct iwlagn_schedq_bc_tbl scheduler byte count table
752 * base physical address provided by SCD_DRAM_BASE_ADDR
753 * For devices up to 22000:
754 * @tfd_offset 0-12 - tx command byte count
755 * 12-16 - station index
756 * For 22000:
757 * @tfd_offset 0-12 - tx command byte count
758 * 12-13 - number of 64 byte chunks
759 * 14-16 - reserved
760 */
761 struct iwlagn_scd_bc_tbl {
762 __le16 tfd_offset[TFD_QUEUE_BC_SIZE];
763 } __packed;
764
765 /**
766 * struct iwl_gen3_bc_tbl scheduler byte count table gen3
767 * For AX210 and on:
768 * @tfd_offset: 0-12 - tx command byte count
769 * 12-13 - number of 64 byte chunks
770 * 14-16 - reserved
771 */
772 struct iwl_gen3_bc_tbl {
773 __le16 tfd_offset[TFD_QUEUE_BC_SIZE_GEN3];
774 } __packed;
775
776 #endif /* !__iwl_fh_h__ */
777