iwl-trans.h 21.2 KB
Newer Older
1 2 3 4 5 6 7
/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
W
Wey-Yi Guy 已提交
8
 * Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved.
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
W
Wey-Yi Guy 已提交
33
 * Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved.
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
63 64
#ifndef __iwl_trans_h__
#define __iwl_trans_h__
65

66
#include <linux/ieee80211.h>
67
#include <linux/mm.h> /* for page_address */
E
Emmanuel Grumbach 已提交
68

69
#include "iwl-debug.h"
70 71
#include "iwl-config.h"
#include "iwl-fw.h"
72

73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
/**
 * DOC: Transport layer - what is it ?
 *
 * The tranport layer is the layer that deals with the HW directly. It provides
 * an abstraction of the underlying HW to the upper layer. The transport layer
 * doesn't provide any policy, algorithm or anything of this kind, but only
 * mechanisms to make the HW do something.It is not completely stateless but
 * close to it.
 * We will have an implementation for each different supported bus.
 */

/**
 * DOC: Life cycle of the transport layer
 *
 * The transport layer has a very precise life cycle.
 *
 *	1) A helper function is called during the module initialization and
 *	   registers the bus driver's ops with the transport's alloc function.
 *	2) Bus's probe calls to the transport layer's allocation functions.
 *	   Of course this function is bus specific.
 *	3) This allocation functions will spawn the upper layer which will
 *	   register mac80211.
 *
 *	4) At some point (i.e. mac80211's start call), the op_mode will call
 *	   the following sequence:
 *	   start_hw
 *	   start_fw
 *
 *	5) Then when finished (or reset):
 *	   stop_fw (a.k.a. stop device for the moment)
 *	   stop_hw
 *
 *	6) Eventually, the free function will be called.
 */

/**
 * DOC: Host command section
 *
 * A host command is a commaned issued by the upper layer to the fw. There are
 * several versions of fw that have several APIs. The transport layer is
 * completely agnostic to these differences.
 * The transport does provide helper functionnality (i.e. SYNC / ASYNC mode),
 */
116 117 118
#define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4)
#define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ)
#define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4)
119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156
#define SEQ_TO_QUEUE(s)	(((s) >> 8) & 0x1f)
#define QUEUE_TO_SEQ(q)	(((q) & 0x1f) << 8)
#define SEQ_TO_INDEX(s)	((s) & 0xff)
#define INDEX_TO_SEQ(i)	((i) & 0xff)
#define SEQ_RX_FRAME	cpu_to_le16(0x8000)

/**
 * struct iwl_cmd_header
 *
 * This header format appears in the beginning of each command sent from the
 * driver, and each response/notification received from uCode.
 */
struct iwl_cmd_header {
	u8 cmd;		/* Command ID:  REPLY_RXON, etc. */
	u8 flags;	/* 0:5 reserved, 6 abort, 7 internal */
	/*
	 * The driver sets up the sequence number to values of its choosing.
	 * uCode does not use this value, but passes it back to the driver
	 * when sending the response to each driver-originated command, so
	 * the driver can match the response to the command.  Since the values
	 * don't get used by uCode, the driver may set up an arbitrary format.
	 *
	 * There is one exception:  uCode sets bit 15 when it originates
	 * the response/notification, i.e. when the response/notification
	 * is not a direct response to a command sent by the driver.  For
	 * example, uCode issues REPLY_RX when it sends a received frame
	 * to the driver; it is not a direct response to any driver command.
	 *
	 * The Linux driver uses the following format:
	 *
	 *  0:7		tfd index - position within TX queue
	 *  8:12	TX queue id
	 *  13:14	reserved
	 *  15		unsolicited RX or uCode-originated notification
	 */
	__le16 sequence;
} __packed;

J
Johannes Berg 已提交
157 158 159
/* iwl_cmd_header flags value */
#define IWL_CMD_FAILED_MSK 0x40

160 161

#define FH_RSCSR_FRAME_SIZE_MSK		0x00003FFF	/* bits 0-13 */
162 163
#define FH_RSCSR_FRAME_INVALID		0x55550000
#define FH_RSCSR_FRAME_ALIGN		0x40
164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179

struct iwl_rx_packet {
	/*
	 * The first 4 bytes of the RX frame header contain both the RX frame
	 * size and some flags.
	 * Bit fields:
	 * 31:    flag flush RB request
	 * 30:    flag ignore TC (terminal counter) request
	 * 29:    flag fast IRQ request
	 * 28-14: Reserved
	 * 13-00: RX frame size
	 */
	__le32 len_n_flags;
	struct iwl_cmd_header hdr;
	u8 data[];
} __packed;
180

181 182 183 184 185 186
/**
 * enum CMD_MODE - how to send the host commands ?
 *
 * @CMD_SYNC: The caller will be stalled until the fw responds to the command
 * @CMD_ASYNC: Return right away and don't want for the response
 * @CMD_WANT_SKB: valid only with CMD_SYNC. The caller needs the buffer of the
187 188 189 190 191 192
 *	response. The caller needs to call iwl_free_resp when done.
 * @CMD_WANT_HCMD: The caller needs to get the HCMD that was sent in the
 *	response handler. Chunks flagged by %IWL_HCMD_DFL_NOCOPY won't be
 *	copied. The pointer passed to the response handler is in the transport
 *	ownership and don't need to be freed by the op_mode. This also means
 *	that the pointer is invalidated after the op_mode's handler returns.
193 194 195
 * @CMD_ON_DEMAND: This command is sent by the test mode pipe.
 */
enum CMD_MODE {
196 197 198
	CMD_SYNC = 0,
	CMD_ASYNC = BIT(0),
	CMD_WANT_SKB = BIT(1),
199 200
	CMD_WANT_HCMD = BIT(2),
	CMD_ON_DEMAND = BIT(3),
201 202 203 204 205 206 207 208 209 210 211 212 213
};

#define DEF_CMD_PAYLOAD_SIZE 320

/**
 * struct iwl_device_cmd
 *
 * For allocation of the command and tx queues, this establishes the overall
 * size of the largest command we send to uCode, except for commands that
 * aren't fully copied and use other TFD space.
 */
struct iwl_device_cmd {
	struct iwl_cmd_header hdr;	/* uCode API */
214
	u8 payload[DEF_CMD_PAYLOAD_SIZE];
215 216 217 218 219 220
} __packed;

#define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))

#define IWL_MAX_CMD_TFDS	2

221 222 223
/**
 * struct iwl_hcmd_dataflag - flag for each one of the chunks of the command
 *
224
 * @IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's
225 226 227 228
 *	ring. The transport layer doesn't map the command's buffer to DMA, but
 *	rather copies it to an previously allocated DMA buffer. This flag tells
 *	the transport layer not to copy the command, but to map the existing
 *	buffer. This can save memcpy and is worth with very big comamnds.
229 230 231
 * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this
 *	chunk internally and free it again after the command completes. This
 *	can (currently) be used only once per command.
232
 */
233 234
enum iwl_hcmd_dataflag {
	IWL_HCMD_DFL_NOCOPY	= BIT(0),
235
	IWL_HCMD_DFL_DUP	= BIT(1),
236 237 238 239
};

/**
 * struct iwl_host_cmd - Host command to the uCode
240
 *
241
 * @data: array of chunks that composes the data of the host command
242 243 244
 * @resp_pkt: response packet, if %CMD_WANT_SKB was set
 * @_rx_page_order: (internally used to free response packet)
 * @_rx_page_addr: (internally used to free response packet)
245 246
 * @handler_status: return value of the handler of the command
 *	(put in setup_rx_handlers) - valid for SYNC mode only
247
 * @flags: can be CMD_*
248
 * @len: array of the lenths of the chunks in data
249
 * @dataflags: IWL_HCMD_DFL_*
250 251 252 253
 * @id: id of the host command
 */
struct iwl_host_cmd {
	const void *data[IWL_MAX_CMD_TFDS];
254 255 256
	struct iwl_rx_packet *resp_pkt;
	unsigned long _rx_page_addr;
	u32 _rx_page_order;
257 258
	int handler_status;

259 260 261 262 263
	u32 flags;
	u16 len[IWL_MAX_CMD_TFDS];
	u8 dataflags[IWL_MAX_CMD_TFDS];
	u8 id;
};
264

265 266 267 268 269
static inline void iwl_free_resp(struct iwl_host_cmd *cmd)
{
	free_pages(cmd->_rx_page_addr, cmd->_rx_page_order);
}

270 271
struct iwl_rx_cmd_buffer {
	struct page *_page;
272 273
	int _offset;
	bool _page_stolen;
274
	unsigned int truesize;
275 276 277 278
};

static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r)
{
279 280 281 282 283 284
	return (void *)((unsigned long)page_address(r->_page) + r->_offset);
}

static inline int rxb_offset(struct iwl_rx_cmd_buffer *r)
{
	return r->_offset;
285 286 287 288
}

static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
{
289 290 291
	r->_page_stolen = true;
	get_page(r->_page);
	return r->_page;
292 293
}

294 295
#define MAX_NO_RECLAIM_CMDS	6

296 297
#define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))

298 299 300 301 302
/*
 * Maximum number of HW queues the transport layer
 * currently supports
 */
#define IWL_MAX_HW_QUEUES		32
303 304 305
#define IWL_INVALID_STATION	255
#define IWL_MAX_TID_COUNT	8
#define IWL_FRAME_LIMIT	64
306

307 308 309 310
/**
 * struct iwl_trans_config - transport configuration
 *
 * @op_mode: pointer to the upper layer.
311 312
 * @cmd_queue: the index of the command queue.
 *	Must be set before start_fw.
313
 * @cmd_fifo: the fifo for host commands
314 315 316 317 318
 * @no_reclaim_cmds: Some devices erroneously don't set the
 *	SEQ_RX_FRAME bit on some notifications, this is the
 *	list of such notifications to filter. Max length is
 *	%MAX_NO_RECLAIM_CMDS.
 * @n_no_reclaim_cmds: # of commands in list
319 320
 * @rx_buf_size_8k: 8 kB RX buffer size needed for A-MSDUs,
 *	if unset 4k will be the RX buffer size
321 322
 * @queue_watchdog_timeout: time (in ms) after which queues
 *	are considered stuck and will trigger device restart
J
Johannes Berg 已提交
323 324
 * @command_names: array of command names, must be 256 entries
 *	(one for each command); for debugging only
325 326 327
 */
struct iwl_trans_config {
	struct iwl_op_mode *op_mode;
328

329
	u8 cmd_queue;
330
	u8 cmd_fifo;
331 332
	const u8 *no_reclaim_cmds;
	int n_no_reclaim_cmds;
333 334

	bool rx_buf_size_8k;
335
	unsigned int queue_watchdog_timeout;
J
Johannes Berg 已提交
336
	const char **command_names;
337 338
};

339 340
struct iwl_trans;

341 342
/**
 * struct iwl_trans_ops - transport specific operations
343 344 345
 *
 * All the handlers MUST be implemented
 *
346
 * @start_hw: starts the HW- from that point on, the HW can send interrupts
347
 *	May sleep
348
 * @stop_hw: stops the HW- from that point on, the HW will be in low power but
349 350
 *	will still issue interrupt if the HW RF kill is triggered unless
 *	op_mode_leaving is true.
351
 *	May sleep
352
 * @start_fw: allocates and inits all the resources for the transport
353 354
 *	layer. Also kick a fw image.
 *	May sleep
355
 * @fw_alive: called when the fw sends alive notification
356
 *	May sleep
357
 * @stop_device:stops the whole device (embedded CPU put to reset)
358
 *	May sleep
359 360 361
 * @wowlan_suspend: put the device into the correct mode for WoWLAN during
 *	suspend. This is optional, if not implemented WoWLAN will not be
 *	supported. This callback may sleep.
362
 * @send_cmd:send a host command
363
 *	May sleep only if CMD_SYNC is set
364
 * @tx: send an skb
365
 *	Must be atomic
366
 * @reclaim: free packet until ssn. Returns a list of freed packets.
367
 *	Must be atomic
368 369 370
 * @txq_enable: setup a queue. To setup an AC queue, use the
 *	iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
 *	this one. The op_mode must not configure the HCMD queue. May sleep.
371
 * @txq_disable: de-configure a Tx queue to send AMPDUs
372
 *	Must be atomic
373
 * @wait_tx_queue_empty: wait until all tx queues are empty
374
 *	May sleep
375 376
 * @dbgfs_register: add the dbgfs files under this directory. Files will be
 *	automatically deleted.
377 378
 * @suspend: stop the device unless WoWLAN is configured
 * @resume: resume activity of the device
379 380 381
 * @write8: write a u8 to a register at offset ofs from the BAR
 * @write32: write a u32 to a register at offset ofs from the BAR
 * @read32: read a u32 register at offset ofs from the BAR
382
 * @configure: configure parameters required by the transport layer from
E
Emmanuel Grumbach 已提交
383 384
 *	the op_mode. May be called several times before start_fw, can't be
 *	called after that.
D
Don Fry 已提交
385
 * @set_pmi: set the power pmi state
386 387 388
 */
struct iwl_trans_ops {

389
	int (*start_hw)(struct iwl_trans *iwl_trans);
390
	void (*stop_hw)(struct iwl_trans *iwl_trans, bool op_mode_leaving);
391
	int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw);
392
	void (*fw_alive)(struct iwl_trans *trans);
393
	void (*stop_device)(struct iwl_trans *trans);
394

395 396
	void (*wowlan_suspend)(struct iwl_trans *trans);

397
	int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
398

399
	int (*tx)(struct iwl_trans *trans, struct sk_buff *skb,
400 401 402 403
		  struct iwl_device_cmd *dev_cmd, int queue);
	void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
			struct sk_buff_head *skbs);

404 405
	void (*txq_enable)(struct iwl_trans *trans, int queue, int fifo,
			   int sta_id, int tid, int frame_limit, u16 ssn);
406
	void (*txq_disable)(struct iwl_trans *trans, int queue);
407

408
	int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
409
	int (*wait_tx_queue_empty)(struct iwl_trans *trans);
J
Johannes Berg 已提交
410
#ifdef CONFIG_PM_SLEEP
411 412
	int (*suspend)(struct iwl_trans *trans);
	int (*resume)(struct iwl_trans *trans);
J
Johannes Berg 已提交
413
#endif
414 415 416
	void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val);
	void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val);
	u32 (*read32)(struct iwl_trans *trans, u32 ofs);
417 418
	void (*configure)(struct iwl_trans *trans,
			  const struct iwl_trans_config *trans_cfg);
D
Don Fry 已提交
419
	void (*set_pmi)(struct iwl_trans *trans, bool state);
420 421
};

422 423 424 425 426 427 428 429 430 431 432
/**
 * enum iwl_trans_state - state of the transport layer
 *
 * @IWL_TRANS_NO_FW: no fw has sent an alive response
 * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response
 */
enum iwl_trans_state {
	IWL_TRANS_NO_FW = 0,
	IWL_TRANS_FW_ALIVE	= 1,
};

433 434
/**
 * struct iwl_trans - transport common data
435
 *
436
 * @ops - pointer to iwl_trans_ops
437
 * @op_mode - pointer to the op_mode
438
 * @cfg - pointer to the configuration
439
 * @reg_lock - protect hw register access
440
 * @dev - pointer to struct device * that represents the device
E
Emmanuel Grumbach 已提交
441
 * @hw_id: a u32 with the ID of the device / subdevice.
442
 *	Set during transport allocation.
443
 * @hw_id_str: a string with info about HW ID. Set during transport allocation.
444
 * @pm_support: set to true in start_hw if link pm is supported
445
 * @wait_command_queue: the wait_queue for SYNC host commands
446 447 448 449 450
 * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
 *	The user should use iwl_trans_{alloc,free}_tx_cmd.
 * @dev_cmd_headroom: room needed for the transport's private use before the
 *	device_cmd for Tx - for internal use only
 *	The user should use iwl_trans_{alloc,free}_tx_cmd.
451 452 453 454
 * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before
 *	starting the firmware, used for tracing
 * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the
 *	start of the 802.11 header in the @rx_mpdu_cmd
455
 */
456 457
struct iwl_trans {
	const struct iwl_trans_ops *ops;
458
	struct iwl_op_mode *op_mode;
459
	const struct iwl_cfg *cfg;
460
	enum iwl_trans_state state;
461
	spinlock_t reg_lock;
462

463
	struct device *dev;
464
	u32 hw_rev;
E
Emmanuel Grumbach 已提交
465
	u32 hw_id;
466
	char hw_id_str[52];
467

468 469
	u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;

470
	bool pm_support;
471

472 473
	wait_queue_head_t wait_command_queue;

474 475 476
	/* The following fields are internal only */
	struct kmem_cache *dev_cmd_pool;
	size_t dev_cmd_headroom;
477
	char dev_cmd_pool_name[50];
478

479 480
	struct dentry *dbgfs_dir;

481 482
	/* pointer to trans specific struct */
	/*Ensure that this pointer will always be aligned to sizeof pointer */
483
	char trans_specific[0] __aligned(sizeof(void *));
484 485
};

486
static inline void iwl_trans_configure(struct iwl_trans *trans,
487
				       const struct iwl_trans_config *trans_cfg)
488 489 490 491 492
{
	/*
	 * only set the op_mode for the moment. Later on, this function will do
	 * more
	 */
493
	trans->op_mode = trans_cfg->op_mode;
494 495

	trans->ops->configure(trans, trans_cfg);
496 497
}

498
static inline int iwl_trans_start_hw(struct iwl_trans *trans)
499
{
500 501
	might_sleep();

502
	return trans->ops->start_hw(trans);
503 504
}

505 506
static inline void iwl_trans_stop_hw(struct iwl_trans *trans,
				     bool op_mode_leaving)
507
{
508 509
	might_sleep();

510
	trans->ops->stop_hw(trans, op_mode_leaving);
511 512

	trans->state = IWL_TRANS_NO_FW;
513 514
}

515 516
static inline void iwl_trans_fw_alive(struct iwl_trans *trans)
{
517 518
	might_sleep();

519
	trans->state = IWL_TRANS_FW_ALIVE;
520 521

	trans->ops->fw_alive(trans);
522 523
}

524 525
static inline int iwl_trans_start_fw(struct iwl_trans *trans,
				     const struct fw_img *fw)
526
{
527 528
	might_sleep();

529 530
	WARN_ON_ONCE(!trans->rx_mpdu_cmd);

531
	return trans->ops->start_fw(trans, fw);
532 533
}

534
static inline void iwl_trans_stop_device(struct iwl_trans *trans)
535
{
536 537
	might_sleep();

538
	trans->ops->stop_device(trans);
539 540

	trans->state = IWL_TRANS_NO_FW;
541 542
}

543 544 545 546 547 548
static inline void iwl_trans_wowlan_suspend(struct iwl_trans *trans)
{
	might_sleep();
	trans->ops->wowlan_suspend(trans);
}

549
static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
550 551
				struct iwl_host_cmd *cmd)
{
552 553
	WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
		  "%s bad state = %d", __func__, trans->state);
554

555
	return trans->ops->send_cmd(trans, cmd);
556 557
}

558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577
static inline struct iwl_device_cmd *
iwl_trans_alloc_tx_cmd(struct iwl_trans *trans)
{
	u8 *dev_cmd_ptr = kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC);

	if (unlikely(dev_cmd_ptr == NULL))
		return NULL;

	return (struct iwl_device_cmd *)
			(dev_cmd_ptr + trans->dev_cmd_headroom);
}

static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
					 struct iwl_device_cmd *dev_cmd)
{
	u8 *dev_cmd_ptr = (u8 *)dev_cmd - trans->dev_cmd_headroom;

	kmem_cache_free(trans->dev_cmd_pool, dev_cmd_ptr);
}

578
static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
579
			       struct iwl_device_cmd *dev_cmd, int queue)
580
{
581 582
	WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
		  "%s bad state = %d", __func__, trans->state);
583

584
	return trans->ops->tx(trans, skb, dev_cmd, queue);
585 586
}

587 588
static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
				     int ssn, struct sk_buff_head *skbs)
589
{
590 591
	WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
		  "%s bad state = %d", __func__, trans->state);
592

593
	trans->ops->reclaim(trans, queue, ssn, skbs);
594 595
}

596
static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue)
597
{
598 599
	WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
		  "%s bad state = %d", __func__, trans->state);
600

601
	trans->ops->txq_disable(trans, queue);
602 603
}

604 605 606
static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
					int fifo, int sta_id, int tid,
					int frame_limit, u16 ssn)
607
{
608 609
	might_sleep();

610 611
	WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
		  "%s bad state = %d", __func__, trans->state);
612

613
	trans->ops->txq_enable(trans, queue, fifo, sta_id, tid,
614
				 frame_limit, ssn);
615 616
}

617 618 619 620 621 622 623
static inline void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue,
					   int fifo)
{
	iwl_trans_txq_enable(trans, queue, fifo, IWL_INVALID_STATION,
			     IWL_MAX_TID_COUNT, IWL_FRAME_LIMIT, 0);
}

624 625
static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans)
{
626 627
	WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
		  "%s bad state = %d", __func__, trans->state);
628

629 630 631
	return trans->ops->wait_tx_queue_empty(trans);
}

632 633 634 635 636 637
static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans,
					    struct dentry *dir)
{
	return trans->ops->dbgfs_register(trans, dir);
}

J
Johannes Berg 已提交
638
#ifdef CONFIG_PM_SLEEP
639 640 641 642 643 644 645 646 647
static inline int iwl_trans_suspend(struct iwl_trans *trans)
{
	return trans->ops->suspend(trans);
}

static inline int iwl_trans_resume(struct iwl_trans *trans)
{
	return trans->ops->resume(trans);
}
J
Johannes Berg 已提交
648
#endif
649

650 651 652 653 654 655 656 657 658 659 660 661 662 663 664
static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
{
	trans->ops->write8(trans, ofs, val);
}

static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val)
{
	trans->ops->write32(trans, ofs, val);
}

static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs)
{
	return trans->ops->read32(trans, ofs);
}

D
Don Fry 已提交
665 666 667 668 669
static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state)
{
	trans->ops->set_pmi(trans, state);
}

670
/*****************************************************
671
* driver (transport) register/unregister functions
672
******************************************************/
E
Emmanuel Grumbach 已提交
673 674
int __must_check iwl_pci_register_driver(void);
void iwl_pci_unregister_driver(void);
675

676
#endif /* __iwl_trans_h__ */