1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
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8 * Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved.
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62 *****************************************************************************/
63 #ifndef __iwl_trans_h__
64 #define __iwl_trans_h__
66 #include <linux/ieee80211.h>
67 #include <linux/mm.h> /* for page_address */
69 #include "iwl-debug.h"
70 #include "iwl-config.h"
74 * DOC: Transport layer - what is it ?
76 * The tranport layer is the layer that deals with the HW directly. It provides
77 * an abstraction of the underlying HW to the upper layer. The transport layer
78 * doesn't provide any policy, algorithm or anything of this kind, but only
79 * mechanisms to make the HW do something.It is not completely stateless but
81 * We will have an implementation for each different supported bus.
85 * DOC: Life cycle of the transport layer
87 * The transport layer has a very precise life cycle.
89 * 1) A helper function is called during the module initialization and
90 * registers the bus driver's ops with the transport's alloc function.
91 * 2) Bus's probe calls to the transport layer's allocation functions.
92 * Of course this function is bus specific.
93 * 3) This allocation functions will spawn the upper layer which will
96 * 4) At some point (i.e. mac80211's start call), the op_mode will call
97 * the following sequence:
101 * 5) Then when finished (or reset):
102 * stop_fw (a.k.a. stop device for the moment)
105 * 6) Eventually, the free function will be called.
109 * DOC: Host command section
111 * A host command is a commaned issued by the upper layer to the fw. There are
112 * several versions of fw that have several APIs. The transport layer is
113 * completely agnostic to these differences.
114 * The transport does provide helper functionnality (i.e. SYNC / ASYNC mode),
116 #define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4)
117 #define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ)
118 #define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4)
119 #define SEQ_TO_QUEUE(s) (((s) >> 8) & 0x1f)
120 #define QUEUE_TO_SEQ(q) (((q) & 0x1f) << 8)
121 #define SEQ_TO_INDEX(s) ((s) & 0xff)
122 #define INDEX_TO_SEQ(i) ((i) & 0xff)
123 #define SEQ_RX_FRAME cpu_to_le16(0x8000)
126 * struct iwl_cmd_header
128 * This header format appears in the beginning of each command sent from the
129 * driver, and each response/notification received from uCode.
131 struct iwl_cmd_header {
132 u8 cmd; /* Command ID: REPLY_RXON, etc. */
133 u8 flags; /* 0:5 reserved, 6 abort, 7 internal */
135 * The driver sets up the sequence number to values of its choosing.
136 * uCode does not use this value, but passes it back to the driver
137 * when sending the response to each driver-originated command, so
138 * the driver can match the response to the command. Since the values
139 * don't get used by uCode, the driver may set up an arbitrary format.
141 * There is one exception: uCode sets bit 15 when it originates
142 * the response/notification, i.e. when the response/notification
143 * is not a direct response to a command sent by the driver. For
144 * example, uCode issues REPLY_RX when it sends a received frame
145 * to the driver; it is not a direct response to any driver command.
147 * The Linux driver uses the following format:
149 * 0:7 tfd index - position within TX queue
152 * 15 unsolicited RX or uCode-originated notification
157 /* iwl_cmd_header flags value */
158 #define IWL_CMD_FAILED_MSK 0x40
161 #define FH_RSCSR_FRAME_SIZE_MSK 0x00003FFF /* bits 0-13 */
162 #define FH_RSCSR_FRAME_INVALID 0x55550000
163 #define FH_RSCSR_FRAME_ALIGN 0x40
165 struct iwl_rx_packet {
167 * The first 4 bytes of the RX frame header contain both the RX frame
168 * size and some flags.
170 * 31: flag flush RB request
171 * 30: flag ignore TC (terminal counter) request
172 * 29: flag fast IRQ request
174 * 13-00: RX frame size
177 struct iwl_cmd_header hdr;
182 * enum CMD_MODE - how to send the host commands ?
184 * @CMD_SYNC: The caller will be stalled until the fw responds to the command
185 * @CMD_ASYNC: Return right away and don't want for the response
186 * @CMD_WANT_SKB: valid only with CMD_SYNC. The caller needs the buffer of the
187 * response. The caller needs to call iwl_free_resp when done.
188 * @CMD_WANT_HCMD: The caller needs to get the HCMD that was sent in the
189 * response handler. Chunks flagged by %IWL_HCMD_DFL_NOCOPY won't be
190 * copied. The pointer passed to the response handler is in the transport
191 * ownership and don't need to be freed by the op_mode. This also means
192 * that the pointer is invalidated after the op_mode's handler returns.
193 * @CMD_ON_DEMAND: This command is sent by the test mode pipe.
198 CMD_WANT_SKB = BIT(1),
199 CMD_WANT_HCMD = BIT(2),
200 CMD_ON_DEMAND = BIT(3),
203 #define DEF_CMD_PAYLOAD_SIZE 320
206 * struct iwl_device_cmd
208 * For allocation of the command and tx queues, this establishes the overall
209 * size of the largest command we send to uCode, except for commands that
210 * aren't fully copied and use other TFD space.
212 struct iwl_device_cmd {
213 struct iwl_cmd_header hdr; /* uCode API */
214 u8 payload[DEF_CMD_PAYLOAD_SIZE];
217 #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))
219 #define IWL_MAX_CMD_TFDS 2
222 * 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 * ring. The transport layer doesn't map the command's buffer to DMA, but
226 * rather copies it to an previously allocated DMA buffer. This flag tells
227 * the transport layer not to copy the command, but to map the existing
228 * buffer (that is passed in) instead. This saves the memcpy and allows
229 * commands that are bigger than the fixed buffer to be submitted.
230 * Note that a TFD entry after a NOCOPY one cannot be a normal copied one.
231 * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this
232 * chunk internally and free it again after the command completes. This
233 * can (currently) be used only once per command.
234 * Note that a TFD entry after a DUP one cannot be a normal copied one.
236 enum iwl_hcmd_dataflag {
237 IWL_HCMD_DFL_NOCOPY = BIT(0),
238 IWL_HCMD_DFL_DUP = BIT(1),
242 * struct iwl_host_cmd - Host command to the uCode
244 * @data: array of chunks that composes the data of the host command
245 * @resp_pkt: response packet, if %CMD_WANT_SKB was set
246 * @_rx_page_order: (internally used to free response packet)
247 * @_rx_page_addr: (internally used to free response packet)
248 * @handler_status: return value of the handler of the command
249 * (put in setup_rx_handlers) - valid for SYNC mode only
250 * @flags: can be CMD_*
251 * @len: array of the lenths of the chunks in data
252 * @dataflags: IWL_HCMD_DFL_*
253 * @id: id of the host command
255 struct iwl_host_cmd {
256 const void *data[IWL_MAX_CMD_TFDS];
257 struct iwl_rx_packet *resp_pkt;
258 unsigned long _rx_page_addr;
263 u16 len[IWL_MAX_CMD_TFDS];
264 u8 dataflags[IWL_MAX_CMD_TFDS];
268 static inline void iwl_free_resp(struct iwl_host_cmd *cmd)
270 free_pages(cmd->_rx_page_addr, cmd->_rx_page_order);
273 struct iwl_rx_cmd_buffer {
278 unsigned int truesize;
281 static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r)
283 return (void *)((unsigned long)page_address(r->_page) + r->_offset);
286 static inline int rxb_offset(struct iwl_rx_cmd_buffer *r)
291 static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
293 r->_page_stolen = true;
298 static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r)
300 __free_pages(r->_page, r->_rx_page_order);
303 #define MAX_NO_RECLAIM_CMDS 6
305 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
308 * Maximum number of HW queues the transport layer
311 #define IWL_MAX_HW_QUEUES 32
312 #define IWL_INVALID_STATION 255
313 #define IWL_MAX_TID_COUNT 8
314 #define IWL_FRAME_LIMIT 64
317 * enum iwl_wowlan_status - WoWLAN image/device status
318 * @IWL_D3_STATUS_ALIVE: firmware is still running after resume
319 * @IWL_D3_STATUS_RESET: device was reset while suspended
327 * struct iwl_trans_config - transport configuration
329 * @op_mode: pointer to the upper layer.
330 * @cmd_queue: the index of the command queue.
331 * Must be set before start_fw.
332 * @cmd_fifo: the fifo for host commands
333 * @no_reclaim_cmds: Some devices erroneously don't set the
334 * SEQ_RX_FRAME bit on some notifications, this is the
335 * list of such notifications to filter. Max length is
336 * %MAX_NO_RECLAIM_CMDS.
337 * @n_no_reclaim_cmds: # of commands in list
338 * @rx_buf_size_8k: 8 kB RX buffer size needed for A-MSDUs,
339 * if unset 4k will be the RX buffer size
340 * @bc_table_dword: set to true if the BC table expects the byte count to be
341 * in DWORD (as opposed to bytes)
342 * @queue_watchdog_timeout: time (in ms) after which queues
343 * are considered stuck and will trigger device restart
344 * @command_names: array of command names, must be 256 entries
345 * (one for each command); for debugging only
347 struct iwl_trans_config {
348 struct iwl_op_mode *op_mode;
352 const u8 *no_reclaim_cmds;
353 int n_no_reclaim_cmds;
357 unsigned int queue_watchdog_timeout;
358 const char **command_names;
364 * struct iwl_trans_ops - transport specific operations
366 * All the handlers MUST be implemented
368 * @start_hw: starts the HW- from that point on, the HW can send interrupts
370 * @stop_hw: stops the HW- from that point on, the HW will be in low power but
371 * will still issue interrupt if the HW RF kill is triggered unless
372 * op_mode_leaving is true.
374 * @start_fw: allocates and inits all the resources for the transport
375 * layer. Also kick a fw image.
377 * @fw_alive: called when the fw sends alive notification. If the fw provides
378 * the SCD base address in SRAM, then provide it here, or 0 otherwise.
380 * @stop_device:stops the whole device (embedded CPU put to reset)
382 * @d3_suspend: put the device into the correct mode for WoWLAN during
383 * suspend. This is optional, if not implemented WoWLAN will not be
384 * supported. This callback may sleep.
385 * @d3_resume: resume the device after WoWLAN, enabling the opmode to
386 * talk to the WoWLAN image to get its status. This is optional, if not
387 * implemented WoWLAN will not be supported. This callback may sleep.
388 * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted.
389 * If RFkill is asserted in the middle of a SYNC host command, it must
390 * return -ERFKILL straight away.
391 * May sleep only if CMD_SYNC is set
394 * @reclaim: free packet until ssn. Returns a list of freed packets.
396 * @txq_enable: setup a queue. To setup an AC queue, use the
397 * iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
398 * this one. The op_mode must not configure the HCMD queue. May sleep.
399 * @txq_disable: de-configure a Tx queue to send AMPDUs
401 * @wait_tx_queue_empty: wait until all tx queues are empty
403 * @dbgfs_register: add the dbgfs files under this directory. Files will be
404 * automatically deleted.
405 * @suspend: stop the device unless WoWLAN is configured
406 * @resume: resume activity of the device
407 * @write8: write a u8 to a register at offset ofs from the BAR
408 * @write32: write a u32 to a register at offset ofs from the BAR
409 * @read32: read a u32 register at offset ofs from the BAR
410 * @read_prph: read a DWORD from a periphery register
411 * @write_prph: write a DWORD to a periphery register
412 * @read_mem: read device's SRAM in DWORD
413 * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory
415 * @configure: configure parameters required by the transport layer from
416 * the op_mode. May be called several times before start_fw, can't be
418 * @set_pmi: set the power pmi state
419 * @grab_nic_access: wake the NIC to be able to access non-HBUS regs
420 * @release_nic_access: let the NIC go to sleep
421 * @set_bits_mask - set SRAM register according to value and mask.
423 struct iwl_trans_ops {
425 int (*start_hw)(struct iwl_trans *iwl_trans);
426 void (*stop_hw)(struct iwl_trans *iwl_trans, bool op_mode_leaving);
427 int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw,
429 void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr);
430 void (*stop_device)(struct iwl_trans *trans);
432 void (*d3_suspend)(struct iwl_trans *trans);
433 int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status);
435 int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
437 int (*tx)(struct iwl_trans *trans, struct sk_buff *skb,
438 struct iwl_device_cmd *dev_cmd, int queue);
439 void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
440 struct sk_buff_head *skbs);
442 void (*txq_enable)(struct iwl_trans *trans, int queue, int fifo,
443 int sta_id, int tid, int frame_limit, u16 ssn);
444 void (*txq_disable)(struct iwl_trans *trans, int queue);
446 int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
447 int (*wait_tx_queue_empty)(struct iwl_trans *trans);
448 #ifdef CONFIG_PM_SLEEP
449 int (*suspend)(struct iwl_trans *trans);
450 int (*resume)(struct iwl_trans *trans);
452 void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val);
453 void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val);
454 u32 (*read32)(struct iwl_trans *trans, u32 ofs);
455 u32 (*read_prph)(struct iwl_trans *trans, u32 ofs);
456 void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val);
457 int (*read_mem)(struct iwl_trans *trans, u32 addr,
458 void *buf, int dwords);
459 int (*write_mem)(struct iwl_trans *trans, u32 addr,
460 void *buf, int dwords);
461 void (*configure)(struct iwl_trans *trans,
462 const struct iwl_trans_config *trans_cfg);
463 void (*set_pmi)(struct iwl_trans *trans, bool state);
464 bool (*grab_nic_access)(struct iwl_trans *trans, bool silent);
465 void (*release_nic_access)(struct iwl_trans *trans);
466 void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask,
471 * enum iwl_trans_state - state of the transport layer
473 * @IWL_TRANS_NO_FW: no fw has sent an alive response
474 * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response
476 enum iwl_trans_state {
478 IWL_TRANS_FW_ALIVE = 1,
482 * struct iwl_trans - transport common data
484 * @ops - pointer to iwl_trans_ops
485 * @op_mode - pointer to the op_mode
486 * @cfg - pointer to the configuration
487 * @reg_lock - protect hw register access
488 * @dev - pointer to struct device * that represents the device
489 * @hw_id: a u32 with the ID of the device / subdevice.
490 * Set during transport allocation.
491 * @hw_id_str: a string with info about HW ID. Set during transport allocation.
492 * @pm_support: set to true in start_hw if link pm is supported
493 * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
494 * The user should use iwl_trans_{alloc,free}_tx_cmd.
495 * @dev_cmd_headroom: room needed for the transport's private use before the
496 * device_cmd for Tx - for internal use only
497 * The user should use iwl_trans_{alloc,free}_tx_cmd.
498 * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before
499 * starting the firmware, used for tracing
500 * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the
501 * start of the 802.11 header in the @rx_mpdu_cmd
504 const struct iwl_trans_ops *ops;
505 struct iwl_op_mode *op_mode;
506 const struct iwl_cfg *cfg;
507 enum iwl_trans_state state;
515 u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;
519 /* The following fields are internal only */
520 struct kmem_cache *dev_cmd_pool;
521 size_t dev_cmd_headroom;
522 char dev_cmd_pool_name[50];
524 struct dentry *dbgfs_dir;
526 /* pointer to trans specific struct */
527 /*Ensure that this pointer will always be aligned to sizeof pointer */
528 char trans_specific[0] __aligned(sizeof(void *));
531 static inline void iwl_trans_configure(struct iwl_trans *trans,
532 const struct iwl_trans_config *trans_cfg)
534 trans->op_mode = trans_cfg->op_mode;
536 trans->ops->configure(trans, trans_cfg);
539 static inline int iwl_trans_start_hw(struct iwl_trans *trans)
543 return trans->ops->start_hw(trans);
546 static inline void iwl_trans_stop_hw(struct iwl_trans *trans,
547 bool op_mode_leaving)
551 trans->ops->stop_hw(trans, op_mode_leaving);
554 trans->op_mode = NULL;
556 trans->state = IWL_TRANS_NO_FW;
559 static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr)
563 trans->state = IWL_TRANS_FW_ALIVE;
565 trans->ops->fw_alive(trans, scd_addr);
568 static inline int iwl_trans_start_fw(struct iwl_trans *trans,
569 const struct fw_img *fw,
574 WARN_ON_ONCE(!trans->rx_mpdu_cmd);
576 return trans->ops->start_fw(trans, fw, run_in_rfkill);
579 static inline void iwl_trans_stop_device(struct iwl_trans *trans)
583 trans->ops->stop_device(trans);
585 trans->state = IWL_TRANS_NO_FW;
588 static inline void iwl_trans_d3_suspend(struct iwl_trans *trans)
591 trans->ops->d3_suspend(trans);
594 static inline int iwl_trans_d3_resume(struct iwl_trans *trans,
595 enum iwl_d3_status *status)
598 return trans->ops->d3_resume(trans, status);
601 static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
602 struct iwl_host_cmd *cmd)
604 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
605 "%s bad state = %d", __func__, trans->state);
607 return trans->ops->send_cmd(trans, cmd);
610 static inline struct iwl_device_cmd *
611 iwl_trans_alloc_tx_cmd(struct iwl_trans *trans)
613 u8 *dev_cmd_ptr = kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC);
615 if (unlikely(dev_cmd_ptr == NULL))
618 return (struct iwl_device_cmd *)
619 (dev_cmd_ptr + trans->dev_cmd_headroom);
622 static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
623 struct iwl_device_cmd *dev_cmd)
625 u8 *dev_cmd_ptr = (u8 *)dev_cmd - trans->dev_cmd_headroom;
627 kmem_cache_free(trans->dev_cmd_pool, dev_cmd_ptr);
630 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
631 struct iwl_device_cmd *dev_cmd, int queue)
633 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
634 "%s bad state = %d", __func__, trans->state);
636 return trans->ops->tx(trans, skb, dev_cmd, queue);
639 static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
640 int ssn, struct sk_buff_head *skbs)
642 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
643 "%s bad state = %d", __func__, trans->state);
645 trans->ops->reclaim(trans, queue, ssn, skbs);
648 static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue)
650 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
651 "%s bad state = %d", __func__, trans->state);
653 trans->ops->txq_disable(trans, queue);
656 static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
657 int fifo, int sta_id, int tid,
658 int frame_limit, u16 ssn)
662 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
663 "%s bad state = %d", __func__, trans->state);
665 trans->ops->txq_enable(trans, queue, fifo, sta_id, tid,
669 static inline void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue,
672 iwl_trans_txq_enable(trans, queue, fifo, IWL_INVALID_STATION,
673 IWL_MAX_TID_COUNT, IWL_FRAME_LIMIT, 0);
676 static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans)
678 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
679 "%s bad state = %d", __func__, trans->state);
681 return trans->ops->wait_tx_queue_empty(trans);
684 static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans,
687 return trans->ops->dbgfs_register(trans, dir);
690 #ifdef CONFIG_PM_SLEEP
691 static inline int iwl_trans_suspend(struct iwl_trans *trans)
693 return trans->ops->suspend(trans);
696 static inline int iwl_trans_resume(struct iwl_trans *trans)
698 return trans->ops->resume(trans);
702 static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
704 trans->ops->write8(trans, ofs, val);
707 static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val)
709 trans->ops->write32(trans, ofs, val);
712 static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs)
714 return trans->ops->read32(trans, ofs);
717 static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs)
719 return trans->ops->read_prph(trans, ofs);
722 static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs,
725 return trans->ops->write_prph(trans, ofs, val);
728 static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr,
729 void *buf, int dwords)
731 return trans->ops->read_mem(trans, addr, buf, dwords);
734 #define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize) \
736 if (__builtin_constant_p(bufsize)) \
737 BUILD_BUG_ON((bufsize) % sizeof(u32)); \
738 iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\
741 static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr)
745 if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1)))
751 static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr,
752 void *buf, int dwords)
754 return trans->ops->write_mem(trans, addr, buf, dwords);
757 static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr,
760 return iwl_trans_write_mem(trans, addr, &val, 1);
763 static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state)
765 trans->ops->set_pmi(trans, state);
769 iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value)
771 trans->ops->set_bits_mask(trans, reg, mask, value);
774 #define iwl_trans_grab_nic_access(trans, silent) \
775 __cond_lock(nic_access, \
776 likely((trans)->ops->grab_nic_access(trans, silent)))
778 static inline void __releases(nic_access)
779 iwl_trans_release_nic_access(struct iwl_trans *trans)
781 trans->ops->release_nic_access(trans);
782 __release(nic_access);
785 /*****************************************************
786 * driver (transport) register/unregister functions
787 ******************************************************/
788 int __must_check iwl_pci_register_driver(void);
789 void iwl_pci_unregister_driver(void);
791 #endif /* __iwl_trans_h__ */