1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
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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 */
68 #include <linux/lockdep.h>
70 #include "iwl-debug.h"
71 #include "iwl-config.h"
75 * DOC: Transport layer - what is it ?
77 * The tranport layer is the layer that deals with the HW directly. It provides
78 * an abstraction of the underlying HW to the upper layer. The transport layer
79 * doesn't provide any policy, algorithm or anything of this kind, but only
80 * mechanisms to make the HW do something.It is not completely stateless but
82 * We will have an implementation for each different supported bus.
86 * DOC: Life cycle of the transport layer
88 * The transport layer has a very precise life cycle.
90 * 1) A helper function is called during the module initialization and
91 * registers the bus driver's ops with the transport's alloc function.
92 * 2) Bus's probe calls to the transport layer's allocation functions.
93 * Of course this function is bus specific.
94 * 3) This allocation functions will spawn the upper layer which will
97 * 4) At some point (i.e. mac80211's start call), the op_mode will call
98 * the following sequence:
102 * 5) Then when finished (or reset):
103 * stop_fw (a.k.a. stop device for the moment)
106 * 6) Eventually, the free function will be called.
110 * DOC: Host command section
112 * A host command is a commaned issued by the upper layer to the fw. There are
113 * several versions of fw that have several APIs. The transport layer is
114 * completely agnostic to these differences.
115 * The transport does provide helper functionnality (i.e. SYNC / ASYNC mode),
117 #define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4)
118 #define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ)
119 #define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4)
120 #define SEQ_TO_QUEUE(s) (((s) >> 8) & 0x1f)
121 #define QUEUE_TO_SEQ(q) (((q) & 0x1f) << 8)
122 #define SEQ_TO_INDEX(s) ((s) & 0xff)
123 #define INDEX_TO_SEQ(i) ((i) & 0xff)
124 #define SEQ_RX_FRAME cpu_to_le16(0x8000)
127 * struct iwl_cmd_header
129 * This header format appears in the beginning of each command sent from the
130 * driver, and each response/notification received from uCode.
132 struct iwl_cmd_header {
133 u8 cmd; /* Command ID: REPLY_RXON, etc. */
134 u8 flags; /* 0:5 reserved, 6 abort, 7 internal */
136 * The driver sets up the sequence number to values of its choosing.
137 * uCode does not use this value, but passes it back to the driver
138 * when sending the response to each driver-originated command, so
139 * the driver can match the response to the command. Since the values
140 * don't get used by uCode, the driver may set up an arbitrary format.
142 * There is one exception: uCode sets bit 15 when it originates
143 * the response/notification, i.e. when the response/notification
144 * is not a direct response to a command sent by the driver. For
145 * example, uCode issues REPLY_RX when it sends a received frame
146 * to the driver; it is not a direct response to any driver command.
148 * The Linux driver uses the following format:
150 * 0:7 tfd index - position within TX queue
153 * 15 unsolicited RX or uCode-originated notification
158 /* iwl_cmd_header flags value */
159 #define IWL_CMD_FAILED_MSK 0x40
162 #define FH_RSCSR_FRAME_SIZE_MSK 0x00003FFF /* bits 0-13 */
163 #define FH_RSCSR_FRAME_INVALID 0x55550000
164 #define FH_RSCSR_FRAME_ALIGN 0x40
166 struct iwl_rx_packet {
168 * The first 4 bytes of the RX frame header contain both the RX frame
169 * size and some flags.
171 * 31: flag flush RB request
172 * 30: flag ignore TC (terminal counter) request
173 * 29: flag fast IRQ request
175 * 13-00: RX frame size
178 struct iwl_cmd_header hdr;
183 * enum CMD_MODE - how to send the host commands ?
185 * @CMD_SYNC: The caller will be stalled until the fw responds to the command
186 * @CMD_ASYNC: Return right away and don't want for the response
187 * @CMD_WANT_SKB: valid only with CMD_SYNC. The caller needs the buffer of the
188 * response. The caller needs to call iwl_free_resp when done.
189 * @CMD_ON_DEMAND: This command is sent by the test mode pipe.
194 CMD_WANT_SKB = BIT(1),
195 CMD_ON_DEMAND = BIT(2),
198 #define DEF_CMD_PAYLOAD_SIZE 320
201 * struct iwl_device_cmd
203 * For allocation of the command and tx queues, this establishes the overall
204 * size of the largest command we send to uCode, except for commands that
205 * aren't fully copied and use other TFD space.
207 struct iwl_device_cmd {
208 struct iwl_cmd_header hdr; /* uCode API */
209 u8 payload[DEF_CMD_PAYLOAD_SIZE];
212 #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))
215 * number of transfer buffers (fragments) per transmit frame descriptor;
216 * this is just the driver's idea, the hardware supports 20
218 #define IWL_MAX_CMD_TBS_PER_TFD 2
221 * struct iwl_hcmd_dataflag - flag for each one of the chunks of the command
223 * @IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's
224 * ring. The transport layer doesn't map the command's buffer to DMA, but
225 * rather copies it to an previously allocated DMA buffer. This flag tells
226 * the transport layer not to copy the command, but to map the existing
227 * buffer (that is passed in) instead. This saves the memcpy and allows
228 * commands that are bigger than the fixed buffer to be submitted.
229 * Note that a TFD entry after a NOCOPY one cannot be a normal copied one.
230 * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this
231 * chunk internally and free it again after the command completes. This
232 * can (currently) be used only once per command.
233 * Note that a TFD entry after a DUP one cannot be a normal copied one.
235 enum iwl_hcmd_dataflag {
236 IWL_HCMD_DFL_NOCOPY = BIT(0),
237 IWL_HCMD_DFL_DUP = BIT(1),
241 * struct iwl_host_cmd - Host command to the uCode
243 * @data: array of chunks that composes the data of the host command
244 * @resp_pkt: response packet, if %CMD_WANT_SKB was set
245 * @_rx_page_order: (internally used to free response packet)
246 * @_rx_page_addr: (internally used to free response packet)
247 * @handler_status: return value of the handler of the command
248 * (put in setup_rx_handlers) - valid for SYNC mode only
249 * @flags: can be CMD_*
250 * @len: array of the lenths of the chunks in data
251 * @dataflags: IWL_HCMD_DFL_*
252 * @id: id of the host command
254 struct iwl_host_cmd {
255 const void *data[IWL_MAX_CMD_TBS_PER_TFD];
256 struct iwl_rx_packet *resp_pkt;
257 unsigned long _rx_page_addr;
262 u16 len[IWL_MAX_CMD_TBS_PER_TFD];
263 u8 dataflags[IWL_MAX_CMD_TBS_PER_TFD];
267 static inline void iwl_free_resp(struct iwl_host_cmd *cmd)
269 free_pages(cmd->_rx_page_addr, cmd->_rx_page_order);
272 struct iwl_rx_cmd_buffer {
277 unsigned int truesize;
280 static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r)
282 return (void *)((unsigned long)page_address(r->_page) + r->_offset);
285 static inline int rxb_offset(struct iwl_rx_cmd_buffer *r)
290 static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
292 r->_page_stolen = true;
297 static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r)
299 __free_pages(r->_page, r->_rx_page_order);
302 #define MAX_NO_RECLAIM_CMDS 6
304 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
307 * Maximum number of HW queues the transport layer
310 #define IWL_MAX_HW_QUEUES 32
311 #define IWL_INVALID_STATION 255
312 #define IWL_MAX_TID_COUNT 8
313 #define IWL_FRAME_LIMIT 64
316 * enum iwl_wowlan_status - WoWLAN image/device status
317 * @IWL_D3_STATUS_ALIVE: firmware is still running after resume
318 * @IWL_D3_STATUS_RESET: device was reset while suspended
326 * struct iwl_trans_config - transport configuration
328 * @op_mode: pointer to the upper layer.
329 * @cmd_queue: the index of the command queue.
330 * Must be set before start_fw.
331 * @cmd_fifo: the fifo for host commands
332 * @no_reclaim_cmds: Some devices erroneously don't set the
333 * SEQ_RX_FRAME bit on some notifications, this is the
334 * list of such notifications to filter. Max length is
335 * %MAX_NO_RECLAIM_CMDS.
336 * @n_no_reclaim_cmds: # of commands in list
337 * @rx_buf_size_8k: 8 kB RX buffer size needed for A-MSDUs,
338 * if unset 4k will be the RX buffer size
339 * @bc_table_dword: set to true if the BC table expects the byte count to be
340 * in DWORD (as opposed to bytes)
341 * @queue_watchdog_timeout: time (in ms) after which queues
342 * are considered stuck and will trigger device restart
343 * @command_names: array of command names, must be 256 entries
344 * (one for each command); for debugging only
346 struct iwl_trans_config {
347 struct iwl_op_mode *op_mode;
351 const u8 *no_reclaim_cmds;
352 int n_no_reclaim_cmds;
356 unsigned int queue_watchdog_timeout;
357 const char **command_names;
363 * struct iwl_trans_ops - transport specific operations
365 * All the handlers MUST be implemented
367 * @start_hw: starts the HW- from that point on, the HW can send interrupts
369 * @stop_hw: stops the HW- from that point on, the HW will be in low power but
370 * will still issue interrupt if the HW RF kill is triggered unless
371 * op_mode_leaving is true.
373 * @start_fw: allocates and inits all the resources for the transport
374 * layer. Also kick a fw image.
376 * @fw_alive: called when the fw sends alive notification. If the fw provides
377 * the SCD base address in SRAM, then provide it here, or 0 otherwise.
379 * @stop_device:stops the whole device (embedded CPU put to reset)
381 * @d3_suspend: put the device into the correct mode for WoWLAN during
382 * suspend. This is optional, if not implemented WoWLAN will not be
383 * supported. This callback may sleep.
384 * @d3_resume: resume the device after WoWLAN, enabling the opmode to
385 * talk to the WoWLAN image to get its status. This is optional, if not
386 * implemented WoWLAN will not be supported. This callback may sleep.
387 * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted.
388 * If RFkill is asserted in the middle of a SYNC host command, it must
389 * return -ERFKILL straight away.
390 * May sleep only if CMD_SYNC is set
393 * @reclaim: free packet until ssn. Returns a list of freed packets.
395 * @txq_enable: setup a queue. To setup an AC queue, use the
396 * iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
397 * this one. The op_mode must not configure the HCMD queue. May sleep.
398 * @txq_disable: de-configure a Tx queue to send AMPDUs
400 * @wait_tx_queue_empty: wait until all tx queues are empty
402 * @dbgfs_register: add the dbgfs files under this directory. Files will be
403 * automatically deleted.
404 * @suspend: stop the device unless WoWLAN is configured
405 * @resume: resume activity of the device
406 * @write8: write a u8 to a register at offset ofs from the BAR
407 * @write32: write a u32 to a register at offset ofs from the BAR
408 * @read32: read a u32 register at offset ofs from the BAR
409 * @read_prph: read a DWORD from a periphery register
410 * @write_prph: write a DWORD to a periphery register
411 * @read_mem: read device's SRAM in DWORD
412 * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory
414 * @configure: configure parameters required by the transport layer from
415 * the op_mode. May be called several times before start_fw, can't be
417 * @set_pmi: set the power pmi state
418 * @grab_nic_access: wake the NIC to be able to access non-HBUS regs.
419 * Sleeping is not allowed between grab_nic_access and
420 * release_nic_access.
421 * @release_nic_access: let the NIC go to sleep. The "flags" parameter
422 * must be the same one that was sent before to the grab_nic_access.
423 * @set_bits_mask - set SRAM register according to value and mask.
425 struct iwl_trans_ops {
427 int (*start_hw)(struct iwl_trans *iwl_trans);
428 void (*stop_hw)(struct iwl_trans *iwl_trans, bool op_mode_leaving);
429 int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw,
431 void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr);
432 void (*stop_device)(struct iwl_trans *trans);
434 void (*d3_suspend)(struct iwl_trans *trans);
435 int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status);
437 int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
439 int (*tx)(struct iwl_trans *trans, struct sk_buff *skb,
440 struct iwl_device_cmd *dev_cmd, int queue);
441 void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
442 struct sk_buff_head *skbs);
444 void (*txq_enable)(struct iwl_trans *trans, int queue, int fifo,
445 int sta_id, int tid, int frame_limit, u16 ssn);
446 void (*txq_disable)(struct iwl_trans *trans, int queue);
448 int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
449 int (*wait_tx_queue_empty)(struct iwl_trans *trans);
450 #ifdef CONFIG_PM_SLEEP
451 int (*suspend)(struct iwl_trans *trans);
452 int (*resume)(struct iwl_trans *trans);
454 void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val);
455 void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val);
456 u32 (*read32)(struct iwl_trans *trans, u32 ofs);
457 u32 (*read_prph)(struct iwl_trans *trans, u32 ofs);
458 void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val);
459 int (*read_mem)(struct iwl_trans *trans, u32 addr,
460 void *buf, int dwords);
461 int (*write_mem)(struct iwl_trans *trans, u32 addr,
462 void *buf, int dwords);
463 void (*configure)(struct iwl_trans *trans,
464 const struct iwl_trans_config *trans_cfg);
465 void (*set_pmi)(struct iwl_trans *trans, bool state);
466 bool (*grab_nic_access)(struct iwl_trans *trans, bool silent,
467 unsigned long *flags);
468 void (*release_nic_access)(struct iwl_trans *trans,
469 unsigned long *flags);
470 void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask,
475 * enum iwl_trans_state - state of the transport layer
477 * @IWL_TRANS_NO_FW: no fw has sent an alive response
478 * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response
480 enum iwl_trans_state {
482 IWL_TRANS_FW_ALIVE = 1,
486 * struct iwl_trans - transport common data
488 * @ops - pointer to iwl_trans_ops
489 * @op_mode - pointer to the op_mode
490 * @cfg - pointer to the configuration
491 * @dev - pointer to struct device * that represents the device
492 * @hw_id: a u32 with the ID of the device / subdevice.
493 * Set during transport allocation.
494 * @hw_id_str: a string with info about HW ID. Set during transport allocation.
495 * @pm_support: set to true in start_hw if link pm is supported
496 * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
497 * The user should use iwl_trans_{alloc,free}_tx_cmd.
498 * @dev_cmd_headroom: room needed for the transport's private use before the
499 * device_cmd for Tx - for internal use only
500 * The user should use iwl_trans_{alloc,free}_tx_cmd.
501 * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before
502 * starting the firmware, used for tracing
503 * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the
504 * start of the 802.11 header in the @rx_mpdu_cmd
507 const struct iwl_trans_ops *ops;
508 struct iwl_op_mode *op_mode;
509 const struct iwl_cfg *cfg;
510 enum iwl_trans_state state;
517 u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;
521 /* The following fields are internal only */
522 struct kmem_cache *dev_cmd_pool;
523 size_t dev_cmd_headroom;
524 char dev_cmd_pool_name[50];
526 struct dentry *dbgfs_dir;
528 #ifdef CONFIG_LOCKDEP
529 struct lockdep_map sync_cmd_lockdep_map;
532 /* pointer to trans specific struct */
533 /*Ensure that this pointer will always be aligned to sizeof pointer */
534 char trans_specific[0] __aligned(sizeof(void *));
537 static inline void iwl_trans_configure(struct iwl_trans *trans,
538 const struct iwl_trans_config *trans_cfg)
540 trans->op_mode = trans_cfg->op_mode;
542 trans->ops->configure(trans, trans_cfg);
545 static inline int iwl_trans_start_hw(struct iwl_trans *trans)
549 return trans->ops->start_hw(trans);
552 static inline void iwl_trans_stop_hw(struct iwl_trans *trans,
553 bool op_mode_leaving)
557 trans->ops->stop_hw(trans, op_mode_leaving);
560 trans->op_mode = NULL;
562 trans->state = IWL_TRANS_NO_FW;
565 static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr)
569 trans->state = IWL_TRANS_FW_ALIVE;
571 trans->ops->fw_alive(trans, scd_addr);
574 static inline int iwl_trans_start_fw(struct iwl_trans *trans,
575 const struct fw_img *fw,
580 WARN_ON_ONCE(!trans->rx_mpdu_cmd);
582 return trans->ops->start_fw(trans, fw, run_in_rfkill);
585 static inline void iwl_trans_stop_device(struct iwl_trans *trans)
589 trans->ops->stop_device(trans);
591 trans->state = IWL_TRANS_NO_FW;
594 static inline void iwl_trans_d3_suspend(struct iwl_trans *trans)
597 trans->ops->d3_suspend(trans);
600 static inline int iwl_trans_d3_resume(struct iwl_trans *trans,
601 enum iwl_d3_status *status)
604 return trans->ops->d3_resume(trans, status);
607 static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
608 struct iwl_host_cmd *cmd)
612 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
613 "%s bad state = %d", __func__, trans->state);
615 if (!(cmd->flags & CMD_ASYNC))
616 lock_map_acquire_read(&trans->sync_cmd_lockdep_map);
618 ret = trans->ops->send_cmd(trans, cmd);
620 if (!(cmd->flags & CMD_ASYNC))
621 lock_map_release(&trans->sync_cmd_lockdep_map);
626 static inline struct iwl_device_cmd *
627 iwl_trans_alloc_tx_cmd(struct iwl_trans *trans)
629 u8 *dev_cmd_ptr = kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC);
631 if (unlikely(dev_cmd_ptr == NULL))
634 return (struct iwl_device_cmd *)
635 (dev_cmd_ptr + trans->dev_cmd_headroom);
638 static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
639 struct iwl_device_cmd *dev_cmd)
641 u8 *dev_cmd_ptr = (u8 *)dev_cmd - trans->dev_cmd_headroom;
643 kmem_cache_free(trans->dev_cmd_pool, dev_cmd_ptr);
646 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
647 struct iwl_device_cmd *dev_cmd, int queue)
649 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
650 "%s bad state = %d", __func__, trans->state);
652 return trans->ops->tx(trans, skb, dev_cmd, queue);
655 static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
656 int ssn, struct sk_buff_head *skbs)
658 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
659 "%s bad state = %d", __func__, trans->state);
661 trans->ops->reclaim(trans, queue, ssn, skbs);
664 static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue)
666 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
667 "%s bad state = %d", __func__, trans->state);
669 trans->ops->txq_disable(trans, queue);
672 static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
673 int fifo, int sta_id, int tid,
674 int frame_limit, u16 ssn)
678 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
679 "%s bad state = %d", __func__, trans->state);
681 trans->ops->txq_enable(trans, queue, fifo, sta_id, tid,
685 static inline void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue,
688 iwl_trans_txq_enable(trans, queue, fifo, IWL_INVALID_STATION,
689 IWL_MAX_TID_COUNT, IWL_FRAME_LIMIT, 0);
692 static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans)
694 WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
695 "%s bad state = %d", __func__, trans->state);
697 return trans->ops->wait_tx_queue_empty(trans);
700 static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans,
703 return trans->ops->dbgfs_register(trans, dir);
706 #ifdef CONFIG_PM_SLEEP
707 static inline int iwl_trans_suspend(struct iwl_trans *trans)
709 return trans->ops->suspend(trans);
712 static inline int iwl_trans_resume(struct iwl_trans *trans)
714 return trans->ops->resume(trans);
718 static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
720 trans->ops->write8(trans, ofs, val);
723 static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val)
725 trans->ops->write32(trans, ofs, val);
728 static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs)
730 return trans->ops->read32(trans, ofs);
733 static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs)
735 return trans->ops->read_prph(trans, ofs);
738 static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs,
741 return trans->ops->write_prph(trans, ofs, val);
744 static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr,
745 void *buf, int dwords)
747 return trans->ops->read_mem(trans, addr, buf, dwords);
750 #define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize) \
752 if (__builtin_constant_p(bufsize)) \
753 BUILD_BUG_ON((bufsize) % sizeof(u32)); \
754 iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\
757 static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr)
761 if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1)))
767 static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr,
768 void *buf, int dwords)
770 return trans->ops->write_mem(trans, addr, buf, dwords);
773 static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr,
776 return iwl_trans_write_mem(trans, addr, &val, 1);
779 static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state)
781 trans->ops->set_pmi(trans, state);
785 iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value)
787 trans->ops->set_bits_mask(trans, reg, mask, value);
790 #define iwl_trans_grab_nic_access(trans, silent, flags) \
791 __cond_lock(nic_access, \
792 likely((trans)->ops->grab_nic_access(trans, silent, flags)))
794 static inline void __releases(nic_access)
795 iwl_trans_release_nic_access(struct iwl_trans *trans, unsigned long *flags)
797 trans->ops->release_nic_access(trans, flags);
798 __release(nic_access);
801 /*****************************************************
802 * driver (transport) register/unregister functions
803 ******************************************************/
804 int __must_check iwl_pci_register_driver(void);
805 void iwl_pci_unregister_driver(void);
807 static inline void trans_lockdep_init(struct iwl_trans *trans)
809 #ifdef CONFIG_LOCKDEP
810 static struct lock_class_key __key;
812 lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map",
817 #endif /* __iwl_trans_h__ */