1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
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8 * Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved.
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21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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62 *****************************************************************************/
63 #ifndef __iwl_trans_h__
64 #define __iwl_trans_h__
66 #include <linux/ieee80211.h>
68 #include "iwl-shared.h"
69 #include "iwl-debug.h"
72 * DOC: Transport layer - what is it ?
74 * The tranport layer is the layer that deals with the HW directly. It provides
75 * an abstraction of the underlying HW to the upper layer. The transport layer
76 * doesn't provide any policy, algorithm or anything of this kind, but only
77 * mechanisms to make the HW do something.It is not completely stateless but
79 * We will have an implementation for each different supported bus.
83 * DOC: Life cycle of the transport layer
85 * The transport layer has a very precise life cycle.
87 * 1) A helper function is called during the module initialization and
88 * registers the bus driver's ops with the transport's alloc function.
89 * 2) Bus's probe calls to the transport layer's allocation functions.
90 * Of course this function is bus specific.
91 * 3) This allocation functions will spawn the upper layer which will
94 * 4) At some point (i.e. mac80211's start call), the op_mode will call
95 * the following sequence:
99 * 5) Then when finished (or reset):
100 * stop_fw (a.k.a. stop device for the moment)
103 * 6) Eventually, the free function will be called.
114 * DOC: Host command section
116 * A host command is a commaned issued by the upper layer to the fw. There are
117 * several versions of fw that have several APIs. The transport layer is
118 * completely agnostic to these differences.
119 * The transport does provide helper functionnality (i.e. SYNC / ASYNC mode),
121 #define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4)
122 #define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ)
123 #define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4)
126 * enum CMD_MODE - how to send the host commands ?
128 * @CMD_SYNC: The caller will be stalled until the fw responds to the command
129 * @CMD_ASYNC: Return right away and don't want for the response
130 * @CMD_WANT_SKB: valid only with CMD_SYNC. The caller needs the buffer of the
132 * @CMD_ON_DEMAND: This command is sent by the test mode pipe.
137 CMD_WANT_SKB
= BIT(1),
138 CMD_ON_DEMAND
= BIT(2),
141 #define DEF_CMD_PAYLOAD_SIZE 320
144 * struct iwl_device_cmd
146 * For allocation of the command and tx queues, this establishes the overall
147 * size of the largest command we send to uCode, except for commands that
148 * aren't fully copied and use other TFD space.
150 struct iwl_device_cmd
{
151 struct iwl_cmd_header hdr
; /* uCode API */
152 u8 payload
[DEF_CMD_PAYLOAD_SIZE
];
155 #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))
157 #define IWL_MAX_CMD_TFDS 2
160 * struct iwl_hcmd_dataflag - flag for each one of the chunks of the command
162 * IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's
163 * ring. The transport layer doesn't map the command's buffer to DMA, but
164 * rather copies it to an previously allocated DMA buffer. This flag tells
165 * the transport layer not to copy the command, but to map the existing
166 * buffer. This can save memcpy and is worth with very big comamnds.
168 enum iwl_hcmd_dataflag
{
169 IWL_HCMD_DFL_NOCOPY
= BIT(0),
173 * struct iwl_host_cmd - Host command to the uCode
175 * @data: array of chunks that composes the data of the host command
176 * @reply_page: pointer to the page that holds the response to the host command
177 * @handler_status: return value of the handler of the command
178 * (put in setup_rx_handlers) - valid for SYNC mode only
179 * @flags: can be CMD_*
180 * @len: array of the lenths of the chunks in data
181 * @dataflags: IWL_HCMD_DFL_*
182 * @id: id of the host command
184 struct iwl_host_cmd
{
185 const void *data
[IWL_MAX_CMD_TFDS
];
186 unsigned long reply_page
;
190 u16 len
[IWL_MAX_CMD_TFDS
];
191 u8 dataflags
[IWL_MAX_CMD_TFDS
];
196 * struct iwl_trans_ops - transport specific operations
198 * All the handlers MUST be implemented
200 * @start_hw: starts the HW- from that point on, the HW can send interrupts
202 * @stop_hw: stops the HW- from that point on, the HW will be in low power but
203 * will still issue interrupt if the HW RF kill is triggered.
205 * @start_fw: allocates and inits all the resources for the transport
206 * layer. Also kick a fw image.
208 * @fw_alive: called when the fw sends alive notification
210 * @wake_any_queue: wake all the queues of a specfic context IWL_RXON_CTX_*
211 * @stop_device:stops the whole device (embedded CPU put to reset)
213 * @send_cmd:send a host command
214 * May sleep only if CMD_SYNC is set
217 * @reclaim: free packet until ssn. Returns a list of freed packets.
219 * @tx_agg_alloc: allocate resources for a TX BA session
221 * @tx_agg_setup: setup a tx queue for AMPDU - will be called once the HW is
222 * ready and a successful ADDBA response has been received.
224 * @tx_agg_disable: de-configure a Tx queue to send AMPDUs
226 * @free: release all the ressource for the transport layer itself such as
227 * irq, tasklet etc... From this point on, the device may not issue
228 * any interrupt (incl. RFKILL).
230 * @stop_queue: stop a specific queue
231 * @check_stuck_queue: check if a specific queue is stuck
232 * @wait_tx_queue_empty: wait until all tx queues are empty
234 * @dbgfs_register: add the dbgfs files under this directory. Files will be
235 * automatically deleted.
236 * @suspend: stop the device unless WoWLAN is configured
237 * @resume: resume activity of the device
238 * @write8: write a u8 to a register at offset ofs from the BAR
239 * @write32: write a u32 to a register at offset ofs from the BAR
240 * @read32: read a u32 register at offset ofs from the BAR
242 struct iwl_trans_ops
{
244 int (*start_hw
)(struct iwl_trans
*iwl_trans
);
245 void (*stop_hw
)(struct iwl_trans
*iwl_trans
);
246 int (*start_fw
)(struct iwl_trans
*trans
, struct fw_img
*fw
);
247 void (*fw_alive
)(struct iwl_trans
*trans
);
248 void (*stop_device
)(struct iwl_trans
*trans
);
250 void (*wake_any_queue
)(struct iwl_trans
*trans
,
251 enum iwl_rxon_context_id ctx
,
254 int (*send_cmd
)(struct iwl_trans
*trans
, struct iwl_host_cmd
*cmd
);
256 int (*tx
)(struct iwl_trans
*trans
, struct sk_buff
*skb
,
257 struct iwl_device_cmd
*dev_cmd
, enum iwl_rxon_context_id ctx
,
259 int (*reclaim
)(struct iwl_trans
*trans
, int sta_id
, int tid
,
260 int txq_id
, int ssn
, u32 status
,
261 struct sk_buff_head
*skbs
);
263 int (*tx_agg_disable
)(struct iwl_trans
*trans
,
264 int sta_id
, int tid
);
265 int (*tx_agg_alloc
)(struct iwl_trans
*trans
,
266 int sta_id
, int tid
);
267 void (*tx_agg_setup
)(struct iwl_trans
*trans
,
268 enum iwl_rxon_context_id ctx
, int sta_id
, int tid
,
269 int frame_limit
, u16 ssn
);
271 void (*free
)(struct iwl_trans
*trans
);
273 void (*stop_queue
)(struct iwl_trans
*trans
, int q
, const char *msg
);
275 int (*dbgfs_register
)(struct iwl_trans
*trans
, struct dentry
* dir
);
276 int (*check_stuck_queue
)(struct iwl_trans
*trans
, int q
);
277 int (*wait_tx_queue_empty
)(struct iwl_trans
*trans
);
278 #ifdef CONFIG_PM_SLEEP
279 int (*suspend
)(struct iwl_trans
*trans
);
280 int (*resume
)(struct iwl_trans
*trans
);
282 void (*write8
)(struct iwl_trans
*trans
, u32 ofs
, u8 val
);
283 void (*write32
)(struct iwl_trans
*trans
, u32 ofs
, u32 val
);
284 u32 (*read32
)(struct iwl_trans
*trans
, u32 ofs
);
287 /* Opaque calibration results */
288 struct iwl_calib_result
{
289 struct list_head list
;
291 struct iwl_calib_hdr hdr
;
296 * enum iwl_trans_state - state of the transport layer
298 * @IWL_TRANS_NO_FW: no fw has sent an alive response
299 * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response
301 enum iwl_trans_state
{
303 IWL_TRANS_FW_ALIVE
= 1,
307 * struct iwl_trans - transport common data
309 * @ops - pointer to iwl_trans_ops
310 * @op_mode - pointer to the op_mode
311 * @shrd - pointer to iwl_shared which holds shared data from the upper layer
312 * @reg_lock - protect hw register access
313 * @dev - pointer to struct device * that represents the device
314 * @irq - the irq number for the device
315 * @hw_id: a u32 with the ID of the device / subdevice.
316 * Set during transport allocation.
317 * @hw_id_str: a string with info about HW ID. Set during transport allocation.
318 * @ucode_write_complete: indicates that the ucode has been copied.
319 * @nvm_device_type: indicates OTP or eeprom
320 * @pm_support: set to true in start_hw if link pm is supported
321 * @calib_results: list head for init calibration results
324 const struct iwl_trans_ops
*ops
;
325 struct iwl_op_mode
*op_mode
;
326 struct iwl_shared
*shrd
;
327 enum iwl_trans_state state
;
336 u8 ucode_write_complete
;
341 struct list_head calib_results
;
343 /* pointer to trans specific struct */
344 /*Ensure that this pointer will always be aligned to sizeof pointer */
345 char trans_specific
[0] __aligned(sizeof(void *));
348 static inline void iwl_trans_configure(struct iwl_trans
*trans
,
349 struct iwl_op_mode
*op_mode
)
352 * only set the op_mode for the moment. Later on, this function will do
355 trans
->op_mode
= op_mode
;
358 static inline int iwl_trans_start_hw(struct iwl_trans
*trans
)
362 return trans
->ops
->start_hw(trans
);
365 static inline void iwl_trans_stop_hw(struct iwl_trans
*trans
)
369 trans
->ops
->stop_hw(trans
);
371 trans
->state
= IWL_TRANS_NO_FW
;
374 static inline void iwl_trans_fw_alive(struct iwl_trans
*trans
)
378 trans
->ops
->fw_alive(trans
);
380 trans
->state
= IWL_TRANS_FW_ALIVE
;
383 static inline int iwl_trans_start_fw(struct iwl_trans
*trans
, struct fw_img
*fw
)
387 return trans
->ops
->start_fw(trans
, fw
);
390 static inline void iwl_trans_stop_device(struct iwl_trans
*trans
)
394 trans
->ops
->stop_device(trans
);
396 trans
->state
= IWL_TRANS_NO_FW
;
399 static inline void iwl_trans_wake_any_queue(struct iwl_trans
*trans
,
400 enum iwl_rxon_context_id ctx
,
403 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
404 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
406 trans
->ops
->wake_any_queue(trans
, ctx
, msg
);
410 static inline int iwl_trans_send_cmd(struct iwl_trans
*trans
,
411 struct iwl_host_cmd
*cmd
)
413 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
414 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
416 return trans
->ops
->send_cmd(trans
, cmd
);
419 int iwl_trans_send_cmd_pdu(struct iwl_trans
*trans
, u8 id
,
420 u32 flags
, u16 len
, const void *data
);
422 static inline int iwl_trans_tx(struct iwl_trans
*trans
, struct sk_buff
*skb
,
423 struct iwl_device_cmd
*dev_cmd
, enum iwl_rxon_context_id ctx
,
426 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
427 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
429 return trans
->ops
->tx(trans
, skb
, dev_cmd
, ctx
, sta_id
, tid
);
432 static inline int iwl_trans_reclaim(struct iwl_trans
*trans
, int sta_id
,
433 int tid
, int txq_id
, int ssn
, u32 status
,
434 struct sk_buff_head
*skbs
)
436 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
437 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
439 return trans
->ops
->reclaim(trans
, sta_id
, tid
, txq_id
, ssn
,
443 static inline int iwl_trans_tx_agg_disable(struct iwl_trans
*trans
,
448 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
449 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
451 return trans
->ops
->tx_agg_disable(trans
, sta_id
, tid
);
454 static inline int iwl_trans_tx_agg_alloc(struct iwl_trans
*trans
,
459 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
460 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
462 return trans
->ops
->tx_agg_alloc(trans
, sta_id
, tid
);
466 static inline void iwl_trans_tx_agg_setup(struct iwl_trans
*trans
,
467 enum iwl_rxon_context_id ctx
,
469 int frame_limit
, u16 ssn
)
473 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
474 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
476 trans
->ops
->tx_agg_setup(trans
, ctx
, sta_id
, tid
, frame_limit
, ssn
);
479 static inline void iwl_trans_free(struct iwl_trans
*trans
)
481 trans
->ops
->free(trans
);
484 static inline void iwl_trans_stop_queue(struct iwl_trans
*trans
, int q
,
487 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
488 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
490 trans
->ops
->stop_queue(trans
, q
, msg
);
493 static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans
*trans
)
495 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
496 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
498 return trans
->ops
->wait_tx_queue_empty(trans
);
501 static inline int iwl_trans_check_stuck_queue(struct iwl_trans
*trans
, int q
)
503 if (trans
->state
!= IWL_TRANS_FW_ALIVE
)
504 IWL_ERR(trans
, "%s bad state = %d", __func__
, trans
->state
);
506 return trans
->ops
->check_stuck_queue(trans
, q
);
508 static inline int iwl_trans_dbgfs_register(struct iwl_trans
*trans
,
511 return trans
->ops
->dbgfs_register(trans
, dir
);
514 #ifdef CONFIG_PM_SLEEP
515 static inline int iwl_trans_suspend(struct iwl_trans
*trans
)
517 return trans
->ops
->suspend(trans
);
520 static inline int iwl_trans_resume(struct iwl_trans
*trans
)
522 return trans
->ops
->resume(trans
);
526 static inline void iwl_trans_write8(struct iwl_trans
*trans
, u32 ofs
, u8 val
)
528 trans
->ops
->write8(trans
, ofs
, val
);
531 static inline void iwl_trans_write32(struct iwl_trans
*trans
, u32 ofs
, u32 val
)
533 trans
->ops
->write32(trans
, ofs
, val
);
536 static inline u32
iwl_trans_read32(struct iwl_trans
*trans
, u32 ofs
)
538 return trans
->ops
->read32(trans
, ofs
);
541 /*****************************************************
543 ******************************************************/
544 int iwl_send_calib_results(struct iwl_trans
*trans
);
545 int iwl_calib_set(struct iwl_trans
*trans
,
546 const struct iwl_calib_hdr
*cmd
, int len
);
547 void iwl_calib_free_results(struct iwl_trans
*trans
);
549 /*****************************************************
550 * Transport layers implementations + their allocation function
551 ******************************************************/
553 struct pci_device_id
;
554 extern const struct iwl_trans_ops trans_ops_pcie
;
555 struct iwl_trans
*iwl_trans_pcie_alloc(struct iwl_shared
*shrd
,
556 struct pci_dev
*pdev
,
557 const struct pci_device_id
*ent
);
558 int __must_check
iwl_pci_register_driver(void);
559 void iwl_pci_unregister_driver(void);
561 extern const struct iwl_trans_ops trans_ops_idi
;
562 struct iwl_trans
*iwl_trans_idi_alloc(struct iwl_shared
*shrd
,
564 const void *ent_void
);
565 #endif /* __iwl_trans_h__ */