1
/******************************************************************************
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.
8
* Copyright(c) 2005 - 2010 Intel Corporation. All rights reserved.
10
* This program is free software; you can redistribute it and/or modify
11
* it under the terms of version 2 of the GNU General Public License as
12
* published by the Free Software Foundation.
14
* This program is distributed in the hope that it will be useful, but
15
* WITHOUT ANY WARRANTY; without even the implied warranty of
16
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17
* General Public License for more details.
19
* You should have received a copy of the GNU General Public License
20
* along with this program; if not, write to the Free Software
21
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24
* The full GNU General Public License is included in this distribution
25
* in the file called LICENSE.GPL.
27
* Contact Information:
28
* Intel Linux Wireless <ilw@linux.intel.com>
29
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33
* Copyright(c) 2005 - 2010 Intel Corporation. All rights reserved.
34
* All rights reserved.
36
* Redistribution and use in source and binary forms, with or without
37
* modification, are permitted provided that the following conditions
40
* * Redistributions of source code must retain the above copyright
41
* notice, this list of conditions and the following disclaimer.
42
* * Redistributions in binary form must reproduce the above copyright
43
* notice, this list of conditions and the following disclaimer in
44
* the documentation and/or other materials provided with the
46
* * Neither the name Intel Corporation nor the names of its
47
* contributors may be used to endorse or promote products derived
48
* from this software without specific prior written permission.
50
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62
*****************************************************************************/
66
/****************************/
67
/* Flow Handler Definitions */
68
/****************************/
71
* This I/O area is directly read/writable by driver (e.g. Linux uses writel())
72
* Addresses are offsets from device's PCI hardware base address.
74
#define FH_MEM_LOWER_BOUND (0x1000)
75
#define FH_MEM_UPPER_BOUND (0x2000)
78
* Keep-Warm (KW) buffer base address.
80
* Driver must allocate a 4KByte buffer that is used by 4965 for keeping the
81
* host DRAM powered on (via dummy accesses to DRAM) to maintain low-latency
82
* DRAM access when 4965 is Txing or Rxing. The dummy accesses prevent host
83
* from going into a power-savings mode that would cause higher DRAM latency,
84
* and possible data over/under-runs, before all Tx/Rx is complete.
86
* Driver loads FH_KW_MEM_ADDR_REG with the physical address (bits 35:4)
87
* of the buffer, which must be 4K aligned. Once this is set up, the 4965
88
* automatically invokes keep-warm accesses when normal accesses might not
89
* be sufficient to maintain fast DRAM response.
92
* 31-0: Keep-warm buffer physical base address [35:4], must be 4K aligned
94
#define FH_KW_MEM_ADDR_REG (FH_MEM_LOWER_BOUND + 0x97C)
98
* TFD Circular Buffers Base (CBBC) addresses
100
* 4965 has 16 base pointer registers, one for each of 16 host-DRAM-resident
101
* circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs)
102
* (see struct iwl_tfd_frame). These 16 pointer registers are offset by 0x04
103
* bytes from one another. Each TFD circular buffer in DRAM must be 256-byte
104
* aligned (address bits 0-7 must be 0).
106
* Bit fields in each pointer register:
107
* 27-0: TFD CB physical base address [35:8], must be 256-byte aligned
109
#define FH_MEM_CBBC_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0)
110
#define FH_MEM_CBBC_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xA10)
112
/* Find TFD CB base pointer for given queue (range 0-15). */
113
#define FH_MEM_CBBC_QUEUE(x) (FH_MEM_CBBC_LOWER_BOUND + (x) * 0x4)
117
* Rx SRAM Control and Status Registers (RSCSR)
119
* These registers provide handshake between driver and 4965 for the Rx queue
120
* (this queue handles *all* command responses, notifications, Rx data, etc.
121
* sent from 4965 uCode to host driver). Unlike Tx, there is only one Rx
122
* queue, and only one Rx DMA/FIFO channel. Also unlike Tx, which can
123
* concatenate up to 20 DRAM buffers to form a Tx frame, each Receive Buffer
124
* Descriptor (RBD) points to only one Rx Buffer (RB); there is a 1:1
125
* mapping between RBDs and RBs.
127
* Driver must allocate host DRAM memory for the following, and set the
128
* physical address of each into 4965 registers:
130
* 1) Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256
131
* entries (although any power of 2, up to 4096, is selectable by driver).
132
* Each entry (1 dword) points to a receive buffer (RB) of consistent size
133
* (typically 4K, although 8K or 16K are also selectable by driver).
134
* Driver sets up RB size and number of RBDs in the CB via Rx config
135
* register FH_MEM_RCSR_CHNL0_CONFIG_REG.
137
* Bit fields within one RBD:
138
* 27-0: Receive Buffer physical address bits [35:8], 256-byte aligned
140
* Driver sets physical address [35:8] of base of RBD circular buffer
141
* into FH_RSCSR_CHNL0_RBDCB_BASE_REG [27:0].
143
* 2) Rx status buffer, 8 bytes, in which 4965 indicates which Rx Buffers
144
* (RBs) have been filled, via a "write pointer", actually the index of
145
* the RB's corresponding RBD within the circular buffer. Driver sets
146
* physical address [35:4] into FH_RSCSR_CHNL0_STTS_WPTR_REG [31:0].
148
* Bit fields in lower dword of Rx status buffer (upper dword not used
149
* by driver; see struct iwl4965_shared, val0):
150
* 31-12: Not used by driver
151
* 11- 0: Index of last filled Rx buffer descriptor
152
* (4965 writes, driver reads this value)
154
* As the driver prepares Receive Buffers (RBs) for 4965 to fill, driver must
155
* enter pointers to these RBs into contiguous RBD circular buffer entries,
156
* and update the 4965's "write" index register,
157
* FH_RSCSR_CHNL0_RBDCB_WPTR_REG.
159
* This "write" index corresponds to the *next* RBD that the driver will make
160
* available, i.e. one RBD past the tail of the ready-to-fill RBDs within
161
* the circular buffer. This value should initially be 0 (before preparing any
162
* RBs), should be 8 after preparing the first 8 RBs (for example), and must
163
* wrap back to 0 at the end of the circular buffer (but don't wrap before
164
* "read" index has advanced past 1! See below).
165
* NOTE: 4965 EXPECTS THE WRITE INDEX TO BE INCREMENTED IN MULTIPLES OF 8.
167
* As the 4965 fills RBs (referenced from contiguous RBDs within the circular
168
* buffer), it updates the Rx status buffer in host DRAM, 2) described above,
169
* to tell the driver the index of the latest filled RBD. The driver must
170
* read this "read" index from DRAM after receiving an Rx interrupt from 4965.
172
* The driver must also internally keep track of a third index, which is the
173
* next RBD to process. When receiving an Rx interrupt, driver should process
174
* all filled but unprocessed RBs up to, but not including, the RB
175
* corresponding to the "read" index. For example, if "read" index becomes "1",
176
* driver may process the RB pointed to by RBD 0. Depending on volume of
177
* traffic, there may be many RBs to process.
179
* If read index == write index, 4965 thinks there is no room to put new data.
180
* Due to this, the maximum number of filled RBs is 255, instead of 256. To
181
* be safe, make sure that there is a gap of at least 2 RBDs between "write"
182
* and "read" indexes; that is, make sure that there are no more than 254
183
* buffers waiting to be filled.
185
#define FH_MEM_RSCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBC0)
186
#define FH_MEM_RSCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
187
#define FH_MEM_RSCSR_CHNL0 (FH_MEM_RSCSR_LOWER_BOUND)
190
* Physical base address of 8-byte Rx Status buffer.
192
* 31-0: Rx status buffer physical base address [35:4], must 16-byte aligned.
194
#define FH_RSCSR_CHNL0_STTS_WPTR_REG (FH_MEM_RSCSR_CHNL0)
197
* Physical base address of Rx Buffer Descriptor Circular Buffer.
199
* 27-0: RBD CD physical base address [35:8], must be 256-byte aligned.
201
#define FH_RSCSR_CHNL0_RBDCB_BASE_REG (FH_MEM_RSCSR_CHNL0 + 0x004)
204
* Rx write pointer (index, really!).
206
* 11-0: Index of driver's most recent prepared-to-be-filled RBD, + 1.
207
* NOTE: For 256-entry circular buffer, use only bits [7:0].
209
#define FH_RSCSR_CHNL0_RBDCB_WPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x008)
210
#define FH_RSCSR_CHNL0_WPTR (FH_RSCSR_CHNL0_RBDCB_WPTR_REG)
214
* Rx Config/Status Registers (RCSR)
215
* Rx Config Reg for channel 0 (only channel used)
217
* Driver must initialize FH_MEM_RCSR_CHNL0_CONFIG_REG as follows for
218
* normal operation (see bit fields).
220
* Clearing FH_MEM_RCSR_CHNL0_CONFIG_REG to 0 turns off Rx DMA.
221
* Driver should poll FH_MEM_RSSR_RX_STATUS_REG for
222
* FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (bit 24) before continuing.
225
* 31-30: Rx DMA channel enable: '00' off/pause, '01' pause at end of frame,
226
* '10' operate normally
228
* 23-20: # RBDs in circular buffer = 2^value; use "8" for 256 RBDs (normal),
229
* min "5" for 32 RBDs, max "12" for 4096 RBDs.
231
* 17-16: size of each receive buffer; '00' 4K (normal), '01' 8K,
232
* '10' 12K, '11' 16K.
234
* 13-12: IRQ destination; '00' none, '01' host driver (normal operation)
235
* 11- 4: timeout for closing Rx buffer and interrupting host (units 32 usec)
236
* typical value 0x10 (about 1/2 msec)
239
#define FH_MEM_RCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
240
#define FH_MEM_RCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xCC0)
241
#define FH_MEM_RCSR_CHNL0 (FH_MEM_RCSR_LOWER_BOUND)
243
#define FH_MEM_RCSR_CHNL0_CONFIG_REG (FH_MEM_RCSR_CHNL0)
245
#define FH_RCSR_CHNL0_RX_CONFIG_RB_TIMEOUT_MSK (0x00000FF0) /* bits 4-11 */
246
#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_MSK (0x00001000) /* bits 12 */
247
#define FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK (0x00008000) /* bit 15 */
248
#define FH_RCSR_CHNL0_RX_CONFIG_RB_SIZE_MSK (0x00030000) /* bits 16-17 */
249
#define FH_RCSR_CHNL0_RX_CONFIG_RBDBC_SIZE_MSK (0x00F00000) /* bits 20-23 */
250
#define FH_RCSR_CHNL0_RX_CONFIG_DMA_CHNL_EN_MSK (0xC0000000) /* bits 30-31*/
252
#define FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS (20)
253
#define FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS (4)
254
#define RX_RB_TIMEOUT (0x10)
256
#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_VAL (0x00000000)
257
#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_EOF_VAL (0x40000000)
258
#define FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL (0x80000000)
260
#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K (0x00000000)
261
#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K (0x00010000)
262
#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K (0x00020000)
263
#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_16K (0x00030000)
265
#define FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY (0x00000004)
266
#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_NO_INT_VAL (0x00000000)
267
#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL (0x00001000)
269
#define FH_RSCSR_FRAME_SIZE_MSK (0x00003FFF) /* bits 0-13 */
272
* Rx Shared Status Registers (RSSR)
274
* After stopping Rx DMA channel (writing 0 to
275
* FH_MEM_RCSR_CHNL0_CONFIG_REG), driver must poll
276
* FH_MEM_RSSR_RX_STATUS_REG until Rx channel is idle.
279
* 24: 1 = Channel 0 is idle
281
* FH_MEM_RSSR_SHARED_CTRL_REG and FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV
282
* contain default values that should not be altered by the driver.
284
#define FH_MEM_RSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC40)
285
#define FH_MEM_RSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
287
#define FH_MEM_RSSR_SHARED_CTRL_REG (FH_MEM_RSSR_LOWER_BOUND)
288
#define FH_MEM_RSSR_RX_STATUS_REG (FH_MEM_RSSR_LOWER_BOUND + 0x004)
289
#define FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV\
290
(FH_MEM_RSSR_LOWER_BOUND + 0x008)
292
#define FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (0x01000000)
294
#define FH_MEM_TFDIB_REG1_ADDR_BITSHIFT 28
296
/* TFDB Area - TFDs buffer table */
297
#define FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK (0xFFFFFFFF)
298
#define FH_TFDIB_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x900)
299
#define FH_TFDIB_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0x958)
300
#define FH_TFDIB_CTRL0_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl))
301
#define FH_TFDIB_CTRL1_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl) + 0x4)
304
* Transmit DMA Channel Control/Status Registers (TCSR)
306
* 4965 has one configuration register for each of 8 Tx DMA/FIFO channels
307
* supported in hardware (don't confuse these with the 16 Tx queues in DRAM,
308
* which feed the DMA/FIFO channels); config regs are separated by 0x20 bytes.
310
* To use a Tx DMA channel, driver must initialize its
311
* FH_TCSR_CHNL_TX_CONFIG_REG(chnl) with:
313
* FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
314
* FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL
316
* All other bits should be 0.
319
* 31-30: Tx DMA channel enable: '00' off/pause, '01' pause at end of frame,
320
* '10' operate normally
321
* 29- 4: Reserved, set to "0"
322
* 3: Enable internal DMA requests (1, normal operation), disable (0)
323
* 2- 0: Reserved, set to "0"
325
#define FH_TCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
326
#define FH_TCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xE60)
328
/* Find Control/Status reg for given Tx DMA/FIFO channel */
329
#define FH49_TCSR_CHNL_NUM (7)
330
#define FH50_TCSR_CHNL_NUM (8)
332
/* TCSR: tx_config register values */
333
#define FH_TCSR_CHNL_TX_CONFIG_REG(_chnl) \
334
(FH_TCSR_LOWER_BOUND + 0x20 * (_chnl))
335
#define FH_TCSR_CHNL_TX_CREDIT_REG(_chnl) \
336
(FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x4)
337
#define FH_TCSR_CHNL_TX_BUF_STS_REG(_chnl) \
338
(FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x8)
340
#define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF (0x00000000)
341
#define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_DRV (0x00000001)
343
#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE (0x00000000)
344
#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE (0x00000008)
346
#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_NOINT (0x00000000)
347
#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD (0x00100000)
348
#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD (0x00200000)
350
#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT (0x00000000)
351
#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_ENDTFD (0x00400000)
352
#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_IFTFD (0x00800000)
354
#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE (0x00000000)
355
#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE_EOF (0x40000000)
356
#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE (0x80000000)
358
#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_EMPTY (0x00000000)
359
#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_WAIT (0x00002000)
360
#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID (0x00000003)
362
#define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM (20)
363
#define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX (12)
366
* Tx Shared Status Registers (TSSR)
368
* After stopping Tx DMA channel (writing 0 to
369
* FH_TCSR_CHNL_TX_CONFIG_REG(chnl)), driver must poll
370
* FH_TSSR_TX_STATUS_REG until selected Tx channel is idle
371
* (channel's buffers empty | no pending requests).
374
* 31-24: 1 = Channel buffers empty (channel 7:0)
375
* 23-16: 1 = No pending requests (channel 7:0)
377
#define FH_TSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xEA0)
378
#define FH_TSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xEC0)
380
#define FH_TSSR_TX_STATUS_REG (FH_TSSR_LOWER_BOUND + 0x010)
383
* Bit fields for TSSR(Tx Shared Status & Control) error status register:
384
* 31: Indicates an address error when accessed to internal memory
385
* uCode/driver must write "1" in order to clear this flag
386
* 30: Indicates that Host did not send the expected number of dwords to FH
387
* uCode/driver must write "1" in order to clear this flag
388
* 16-9:Each status bit is for one channel. Indicates that an (Error) ActDMA
389
* command was received from the scheduler while the TRB was already full
390
* with previous command
391
* uCode/driver must write "1" in order to clear this flag
392
* 7-0: Each status bit indicates a channel's TxCredit error. When an error
393
* bit is set, it indicates that the FH has received a full indication
394
* from the RTC TxFIFO and the current value of the TxCredit counter was
395
* not equal to zero. This mean that the credit mechanism was not
396
* synchronized to the TxFIFO status
397
* uCode/driver must write "1" in order to clear this flag
399
#define FH_TSSR_TX_ERROR_REG (FH_TSSR_LOWER_BOUND + 0x018)
401
#define FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) ((1 << (_chnl)) << 16)
403
/* Tx service channels */
404
#define FH_SRVC_CHNL (9)
405
#define FH_SRVC_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9C8)
406
#define FH_SRVC_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0)
407
#define FH_SRVC_CHNL_SRAM_ADDR_REG(_chnl) \
408
(FH_SRVC_LOWER_BOUND + ((_chnl) - 9) * 0x4)
410
#define FH_TX_CHICKEN_BITS_REG (FH_MEM_LOWER_BOUND + 0xE98)
411
/* Instruct FH to increment the retry count of a packet when
412
* it is brought from the memory to TX-FIFO
414
#define FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN (0x00000002)
416
#define RX_QUEUE_SIZE 256
417
#define RX_QUEUE_MASK 255
418
#define RX_QUEUE_SIZE_LOG 8
421
* RX related structures and functions
423
#define RX_FREE_BUFFERS 64
424
#define RX_LOW_WATERMARK 8
426
/* Size of one Rx buffer in host DRAM */
427
#define IWL_RX_BUF_SIZE_3K (3 * 1000) /* 3945 only */
428
#define IWL_RX_BUF_SIZE_4K (4 * 1024)
429
#define IWL_RX_BUF_SIZE_8K (8 * 1024)
432
* struct iwl_rb_status - reseve buffer status
433
* host memory mapped FH registers
434
* @closed_rb_num [0:11] - Indicates the index of the RB which was closed
435
* @closed_fr_num [0:11] - Indicates the index of the RX Frame which was closed
436
* @finished_rb_num [0:11] - Indicates the index of the current RB
437
* in which the last frame was written to
438
* @finished_fr_num [0:11] - Indicates the index of the RX Frame
439
* which was transfered
441
struct iwl_rb_status {
442
__le16 closed_rb_num;
443
__le16 closed_fr_num;
444
__le16 finished_rb_num;
445
__le16 finished_fr_nam;
446
__le32 __unused; /* 3945 only */
450
#define TFD_QUEUE_SIZE_MAX (256)
451
#define TFD_QUEUE_SIZE_BC_DUP (64)
452
#define TFD_QUEUE_BC_SIZE (TFD_QUEUE_SIZE_MAX + TFD_QUEUE_SIZE_BC_DUP)
453
#define IWL_TX_DMA_MASK DMA_BIT_MASK(36)
454
#define IWL_NUM_OF_TBS 20
456
static inline u8 iwl_get_dma_hi_addr(dma_addr_t addr)
458
return (sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0) & 0xF;
461
* struct iwl_tfd_tb transmit buffer descriptor within transmit frame descriptor
463
* This structure contains dma address and length of transmission address
465
* @lo: low [31:0] portion of the dma address of TX buffer
466
* every even is unaligned on 16 bit boundary
467
* @hi_n_len 0-3 [35:32] portion of dma
468
* 4-15 length of the tx buffer
478
* Transmit Frame Descriptor (TFD)
480
* @ __reserved1[3] reserved
481
* @ num_tbs 0-4 number of active tbs
483
* 6-7 padding (not used)
484
* @ tbs[20] transmit frame buffer descriptors
487
* Each Tx queue uses a circular buffer of 256 TFDs stored in host DRAM.
488
* Both driver and device share these circular buffers, each of which must be
489
* contiguous 256 TFDs x 128 bytes-per-TFD = 32 KBytes
491
* Driver must indicate the physical address of the base of each
492
* circular buffer via the FH_MEM_CBBC_QUEUE registers.
494
* Each TFD contains pointer/size information for up to 20 data buffers
495
* in host DRAM. These buffers collectively contain the (one) frame described
496
* by the TFD. Each buffer must be a single contiguous block of memory within
497
* itself, but buffers may be scattered in host DRAM. Each buffer has max size
498
* of (4K - 4). The concatenates all of a TFD's buffers into a single
499
* Tx frame, up to 8 KBytes in size.
501
* A maximum of 255 (not 256!) TFDs may be on a queue waiting for Tx.
506
struct iwl_tfd_tb tbs[IWL_NUM_OF_TBS];
511
#define IWL_KW_SIZE 0x1000 /* 4k */
513
#endif /* !__iwl_fh_h__ */