1 /******************************************************************************
2 *
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.
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6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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29 * Intel Linux Wireless <ilw@linux.intel.com>
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33 *
34 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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64 *****************************************************************************/
65 #ifndef __iwl_trans_h__
66 #define __iwl_trans_h__
67
68 #include <linux/ieee80211.h>
69 #include <linux/mm.h> /* for page_address */
70 #include <linux/lockdep.h>
71
72 #include "iwl-debug.h"
73 #include "iwl-config.h"
74 #include "iwl-fw.h"
75 #include "iwl-op-mode.h"
76
77 /**
78 * DOC: Transport layer - what is it ?
79 *
80 * The transport layer is the layer that deals with the HW directly. It provides
81 * an abstraction of the underlying HW to the upper layer. The transport layer
82 * doesn't provide any policy, algorithm or anything of this kind, but only
83 * mechanisms to make the HW do something. It is not completely stateless but
84 * close to it.
85 * We will have an implementation for each different supported bus.
86 */
87
88 /**
89 * DOC: Life cycle of the transport layer
90 *
91 * The transport layer has a very precise life cycle.
92 *
93 * 1) A helper function is called during the module initialization and
94 * registers the bus driver's ops with the transport's alloc function.
95 * 2) Bus's probe calls to the transport layer's allocation functions.
96 * Of course this function is bus specific.
97 * 3) This allocation functions will spawn the upper layer which will
98 * register mac80211.
99 *
100 * 4) At some point (i.e. mac80211's start call), the op_mode will call
101 * the following sequence:
102 * start_hw
103 * start_fw
104 *
105 * 5) Then when finished (or reset):
106 * stop_device
107 *
108 * 6) Eventually, the free function will be called.
109 */
110
111 /**
112 * DOC: Host command section
113 *
114 * A host command is a command issued by the upper layer to the fw. There are
115 * several versions of fw that have several APIs. The transport layer is
116 * completely agnostic to these differences.
117 * The transport does provide helper functionality (i.e. SYNC / ASYNC mode),
118 */
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)
124
125 /*
126 * those functions retrieve specific information from
127 * the id field in the iwl_host_cmd struct which contains
128 * the command id, the group id and the version of the command
129 * and vice versa
130 */
iwl_cmd_opcode(u32 cmdid)131 static inline u8 iwl_cmd_opcode(u32 cmdid)
132 {
133 return cmdid & 0xFF;
134 }
135
iwl_cmd_groupid(u32 cmdid)136 static inline u8 iwl_cmd_groupid(u32 cmdid)
137 {
138 return ((cmdid & 0xFF00) >> 8);
139 }
140
iwl_cmd_version(u32 cmdid)141 static inline u8 iwl_cmd_version(u32 cmdid)
142 {
143 return ((cmdid & 0xFF0000) >> 16);
144 }
145
iwl_cmd_id(u8 opcode,u8 groupid,u8 version)146 static inline u32 iwl_cmd_id(u8 opcode, u8 groupid, u8 version)
147 {
148 return opcode + (groupid << 8) + (version << 16);
149 }
150
151 /* make u16 wide id out of u8 group and opcode */
152 #define WIDE_ID(grp, opcode) ((grp << 8) | opcode)
153
154 /* due to the conversion, this group is special; new groups
155 * should be defined in the appropriate fw-api header files
156 */
157 #define IWL_ALWAYS_LONG_GROUP 1
158
159 /**
160 * struct iwl_cmd_header
161 *
162 * This header format appears in the beginning of each command sent from the
163 * driver, and each response/notification received from uCode.
164 */
165 struct iwl_cmd_header {
166 u8 cmd; /* Command ID: REPLY_RXON, etc. */
167 u8 group_id;
168 /*
169 * The driver sets up the sequence number to values of its choosing.
170 * uCode does not use this value, but passes it back to the driver
171 * when sending the response to each driver-originated command, so
172 * the driver can match the response to the command. Since the values
173 * don't get used by uCode, the driver may set up an arbitrary format.
174 *
175 * There is one exception: uCode sets bit 15 when it originates
176 * the response/notification, i.e. when the response/notification
177 * is not a direct response to a command sent by the driver. For
178 * example, uCode issues REPLY_RX when it sends a received frame
179 * to the driver; it is not a direct response to any driver command.
180 *
181 * The Linux driver uses the following format:
182 *
183 * 0:7 tfd index - position within TX queue
184 * 8:12 TX queue id
185 * 13:14 reserved
186 * 15 unsolicited RX or uCode-originated notification
187 */
188 __le16 sequence;
189 } __packed;
190
191 /**
192 * struct iwl_cmd_header_wide
193 *
194 * This header format appears in the beginning of each command sent from the
195 * driver, and each response/notification received from uCode.
196 * this is the wide version that contains more information about the command
197 * like length, version and command type
198 */
199 struct iwl_cmd_header_wide {
200 u8 cmd;
201 u8 group_id;
202 __le16 sequence;
203 __le16 length;
204 u8 reserved;
205 u8 version;
206 } __packed;
207
208 #define FH_RSCSR_FRAME_SIZE_MSK 0x00003FFF /* bits 0-13 */
209 #define FH_RSCSR_FRAME_INVALID 0x55550000
210 #define FH_RSCSR_FRAME_ALIGN 0x40
211
212 struct iwl_rx_packet {
213 /*
214 * The first 4 bytes of the RX frame header contain both the RX frame
215 * size and some flags.
216 * Bit fields:
217 * 31: flag flush RB request
218 * 30: flag ignore TC (terminal counter) request
219 * 29: flag fast IRQ request
220 * 28-14: Reserved
221 * 13-00: RX frame size
222 */
223 __le32 len_n_flags;
224 struct iwl_cmd_header hdr;
225 u8 data[];
226 } __packed;
227
iwl_rx_packet_len(const struct iwl_rx_packet * pkt)228 static inline u32 iwl_rx_packet_len(const struct iwl_rx_packet *pkt)
229 {
230 return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
231 }
232
iwl_rx_packet_payload_len(const struct iwl_rx_packet * pkt)233 static inline u32 iwl_rx_packet_payload_len(const struct iwl_rx_packet *pkt)
234 {
235 return iwl_rx_packet_len(pkt) - sizeof(pkt->hdr);
236 }
237
238 /**
239 * enum CMD_MODE - how to send the host commands ?
240 *
241 * @CMD_ASYNC: Return right away and don't wait for the response
242 * @CMD_WANT_SKB: Not valid with CMD_ASYNC. The caller needs the buffer of
243 * the response. The caller needs to call iwl_free_resp when done.
244 * @CMD_HIGH_PRIO: The command is high priority - it goes to the front of the
245 * command queue, but after other high priority commands. Valid only
246 * with CMD_ASYNC.
247 * @CMD_SEND_IN_IDLE: The command should be sent even when the trans is idle.
248 * @CMD_MAKE_TRANS_IDLE: The command response should mark the trans as idle.
249 * @CMD_WAKE_UP_TRANS: The command response should wake up the trans
250 * (i.e. mark it as non-idle).
251 * @CMD_TB_BITMAP_POS: Position of the first bit for the TB bitmap. We need to
252 * check that we leave enough room for the TBs bitmap which needs 20 bits.
253 */
254 enum CMD_MODE {
255 CMD_ASYNC = BIT(0),
256 CMD_WANT_SKB = BIT(1),
257 CMD_SEND_IN_RFKILL = BIT(2),
258 CMD_HIGH_PRIO = BIT(3),
259 CMD_SEND_IN_IDLE = BIT(4),
260 CMD_MAKE_TRANS_IDLE = BIT(5),
261 CMD_WAKE_UP_TRANS = BIT(6),
262
263 CMD_TB_BITMAP_POS = 11,
264 };
265
266 #define DEF_CMD_PAYLOAD_SIZE 320
267
268 /**
269 * struct iwl_device_cmd
270 *
271 * For allocation of the command and tx queues, this establishes the overall
272 * size of the largest command we send to uCode, except for commands that
273 * aren't fully copied and use other TFD space.
274 */
275 struct iwl_device_cmd {
276 union {
277 struct {
278 struct iwl_cmd_header hdr; /* uCode API */
279 u8 payload[DEF_CMD_PAYLOAD_SIZE];
280 };
281 struct {
282 struct iwl_cmd_header_wide hdr_wide;
283 u8 payload_wide[DEF_CMD_PAYLOAD_SIZE -
284 sizeof(struct iwl_cmd_header_wide) +
285 sizeof(struct iwl_cmd_header)];
286 };
287 };
288 } __packed;
289
290 #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))
291
292 /*
293 * number of transfer buffers (fragments) per transmit frame descriptor;
294 * this is just the driver's idea, the hardware supports 20
295 */
296 #define IWL_MAX_CMD_TBS_PER_TFD 2
297
298 /**
299 * struct iwl_hcmd_dataflag - flag for each one of the chunks of the command
300 *
301 * @IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's
302 * ring. The transport layer doesn't map the command's buffer to DMA, but
303 * rather copies it to a previously allocated DMA buffer. This flag tells
304 * the transport layer not to copy the command, but to map the existing
305 * buffer (that is passed in) instead. This saves the memcpy and allows
306 * commands that are bigger than the fixed buffer to be submitted.
307 * Note that a TFD entry after a NOCOPY one cannot be a normal copied one.
308 * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this
309 * chunk internally and free it again after the command completes. This
310 * can (currently) be used only once per command.
311 * Note that a TFD entry after a DUP one cannot be a normal copied one.
312 */
313 enum iwl_hcmd_dataflag {
314 IWL_HCMD_DFL_NOCOPY = BIT(0),
315 IWL_HCMD_DFL_DUP = BIT(1),
316 };
317
318 /**
319 * struct iwl_host_cmd - Host command to the uCode
320 *
321 * @data: array of chunks that composes the data of the host command
322 * @resp_pkt: response packet, if %CMD_WANT_SKB was set
323 * @_rx_page_order: (internally used to free response packet)
324 * @_rx_page_addr: (internally used to free response packet)
325 * @flags: can be CMD_*
326 * @len: array of the lengths of the chunks in data
327 * @dataflags: IWL_HCMD_DFL_*
328 * @id: command id of the host command, for wide commands encoding the
329 * version and group as well
330 */
331 struct iwl_host_cmd {
332 const void *data[IWL_MAX_CMD_TBS_PER_TFD];
333 struct iwl_rx_packet *resp_pkt;
334 unsigned long _rx_page_addr;
335 u32 _rx_page_order;
336
337 u32 flags;
338 u32 id;
339 u16 len[IWL_MAX_CMD_TBS_PER_TFD];
340 u8 dataflags[IWL_MAX_CMD_TBS_PER_TFD];
341 };
342
iwl_free_resp(struct iwl_host_cmd * cmd)343 static inline void iwl_free_resp(struct iwl_host_cmd *cmd)
344 {
345 free_pages(cmd->_rx_page_addr, cmd->_rx_page_order);
346 }
347
348 struct iwl_rx_cmd_buffer {
349 struct page *_page;
350 int _offset;
351 bool _page_stolen;
352 u32 _rx_page_order;
353 unsigned int truesize;
354 };
355
rxb_addr(struct iwl_rx_cmd_buffer * r)356 static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r)
357 {
358 return (void *)((unsigned long)page_address(r->_page) + r->_offset);
359 }
360
rxb_offset(struct iwl_rx_cmd_buffer * r)361 static inline int rxb_offset(struct iwl_rx_cmd_buffer *r)
362 {
363 return r->_offset;
364 }
365
rxb_steal_page(struct iwl_rx_cmd_buffer * r)366 static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
367 {
368 r->_page_stolen = true;
369 get_page(r->_page);
370 return r->_page;
371 }
372
iwl_free_rxb(struct iwl_rx_cmd_buffer * r)373 static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r)
374 {
375 __free_pages(r->_page, r->_rx_page_order);
376 }
377
378 #define MAX_NO_RECLAIM_CMDS 6
379
380 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
381
382 /*
383 * Maximum number of HW queues the transport layer
384 * currently supports
385 */
386 #define IWL_MAX_HW_QUEUES 32
387 #define IWL_MAX_TID_COUNT 8
388 #define IWL_FRAME_LIMIT 64
389 #define IWL_MAX_RX_HW_QUEUES 16
390
391 /**
392 * enum iwl_wowlan_status - WoWLAN image/device status
393 * @IWL_D3_STATUS_ALIVE: firmware is still running after resume
394 * @IWL_D3_STATUS_RESET: device was reset while suspended
395 */
396 enum iwl_d3_status {
397 IWL_D3_STATUS_ALIVE,
398 IWL_D3_STATUS_RESET,
399 };
400
401 /**
402 * enum iwl_trans_status: transport status flags
403 * @STATUS_SYNC_HCMD_ACTIVE: a SYNC command is being processed
404 * @STATUS_DEVICE_ENABLED: APM is enabled
405 * @STATUS_TPOWER_PMI: the device might be asleep (need to wake it up)
406 * @STATUS_INT_ENABLED: interrupts are enabled
407 * @STATUS_RFKILL: the HW RFkill switch is in KILL position
408 * @STATUS_FW_ERROR: the fw is in error state
409 * @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands
410 * are sent
411 * @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent
412 * @STATUS_TRANS_DEAD: trans is dead - avoid any read/write operation
413 */
414 enum iwl_trans_status {
415 STATUS_SYNC_HCMD_ACTIVE,
416 STATUS_DEVICE_ENABLED,
417 STATUS_TPOWER_PMI,
418 STATUS_INT_ENABLED,
419 STATUS_RFKILL,
420 STATUS_FW_ERROR,
421 STATUS_TRANS_GOING_IDLE,
422 STATUS_TRANS_IDLE,
423 STATUS_TRANS_DEAD,
424 };
425
426 /**
427 * struct iwl_trans_config - transport configuration
428 *
429 * @op_mode: pointer to the upper layer.
430 * @cmd_queue: the index of the command queue.
431 * Must be set before start_fw.
432 * @cmd_fifo: the fifo for host commands
433 * @cmd_q_wdg_timeout: the timeout of the watchdog timer for the command queue.
434 * @no_reclaim_cmds: Some devices erroneously don't set the
435 * SEQ_RX_FRAME bit on some notifications, this is the
436 * list of such notifications to filter. Max length is
437 * %MAX_NO_RECLAIM_CMDS.
438 * @n_no_reclaim_cmds: # of commands in list
439 * @rx_buf_size_8k: 8 kB RX buffer size needed for A-MSDUs,
440 * if unset 4k will be the RX buffer size
441 * @bc_table_dword: set to true if the BC table expects the byte count to be
442 * in DWORD (as opposed to bytes)
443 * @scd_set_active: should the transport configure the SCD for HCMD queue
444 * @wide_cmd_header: firmware supports wide host command header
445 * @command_names: array of command names, must be 256 entries
446 * (one for each command); for debugging only
447 * @sdio_adma_addr: the default address to set for the ADMA in SDIO mode until
448 * we get the ALIVE from the uCode
449 */
450 struct iwl_trans_config {
451 struct iwl_op_mode *op_mode;
452
453 u8 cmd_queue;
454 u8 cmd_fifo;
455 unsigned int cmd_q_wdg_timeout;
456 const u8 *no_reclaim_cmds;
457 unsigned int n_no_reclaim_cmds;
458
459 bool rx_buf_size_8k;
460 bool bc_table_dword;
461 bool scd_set_active;
462 bool wide_cmd_header;
463 const char *const *command_names;
464
465 u32 sdio_adma_addr;
466 };
467
468 struct iwl_trans_dump_data {
469 u32 len;
470 u8 data[];
471 };
472
473 struct iwl_trans;
474
475 struct iwl_trans_txq_scd_cfg {
476 u8 fifo;
477 s8 sta_id;
478 u8 tid;
479 bool aggregate;
480 int frame_limit;
481 };
482
483 /**
484 * struct iwl_trans_ops - transport specific operations
485 *
486 * All the handlers MUST be implemented
487 *
488 * @start_hw: starts the HW. If low_power is true, the NIC needs to be taken
489 * out of a low power state. From that point on, the HW can send
490 * interrupts. May sleep.
491 * @op_mode_leave: Turn off the HW RF kill indication if on
492 * May sleep
493 * @start_fw: allocates and inits all the resources for the transport
494 * layer. Also kick a fw image.
495 * May sleep
496 * @fw_alive: called when the fw sends alive notification. If the fw provides
497 * the SCD base address in SRAM, then provide it here, or 0 otherwise.
498 * May sleep
499 * @stop_device: stops the whole device (embedded CPU put to reset) and stops
500 * the HW. If low_power is true, the NIC will be put in low power state.
501 * From that point on, the HW will be stopped but will still issue an
502 * interrupt if the HW RF kill switch is triggered.
503 * This callback must do the right thing and not crash even if %start_hw()
504 * was called but not &start_fw(). May sleep.
505 * @d3_suspend: put the device into the correct mode for WoWLAN during
506 * suspend. This is optional, if not implemented WoWLAN will not be
507 * supported. This callback may sleep.
508 * @d3_resume: resume the device after WoWLAN, enabling the opmode to
509 * talk to the WoWLAN image to get its status. This is optional, if not
510 * implemented WoWLAN will not be supported. This callback may sleep.
511 * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted.
512 * If RFkill is asserted in the middle of a SYNC host command, it must
513 * return -ERFKILL straight away.
514 * May sleep only if CMD_ASYNC is not set
515 * @tx: send an skb
516 * Must be atomic
517 * @reclaim: free packet until ssn. Returns a list of freed packets.
518 * Must be atomic
519 * @txq_enable: setup a queue. To setup an AC queue, use the
520 * iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
521 * this one. The op_mode must not configure the HCMD queue. The scheduler
522 * configuration may be %NULL, in which case the hardware will not be
523 * configured. May sleep.
524 * @txq_disable: de-configure a Tx queue to send AMPDUs
525 * Must be atomic
526 * @wait_tx_queue_empty: wait until tx queues are empty. May sleep.
527 * @freeze_txq_timer: prevents the timer of the queue from firing until the
528 * queue is set to awake. Must be atomic.
529 * @dbgfs_register: add the dbgfs files under this directory. Files will be
530 * automatically deleted.
531 * @write8: write a u8 to a register at offset ofs from the BAR
532 * @write32: write a u32 to a register at offset ofs from the BAR
533 * @read32: read a u32 register at offset ofs from the BAR
534 * @read_prph: read a DWORD from a periphery register
535 * @write_prph: write a DWORD to a periphery register
536 * @read_mem: read device's SRAM in DWORD
537 * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory
538 * will be zeroed.
539 * @configure: configure parameters required by the transport layer from
540 * the op_mode. May be called several times before start_fw, can't be
541 * called after that.
542 * @set_pmi: set the power pmi state
543 * @grab_nic_access: wake the NIC to be able to access non-HBUS regs.
544 * Sleeping is not allowed between grab_nic_access and
545 * release_nic_access.
546 * @release_nic_access: let the NIC go to sleep. The "flags" parameter
547 * must be the same one that was sent before to the grab_nic_access.
548 * @set_bits_mask - set SRAM register according to value and mask.
549 * @ref: grab a reference to the transport/FW layers, disallowing
550 * certain low power states
551 * @unref: release a reference previously taken with @ref. Note that
552 * initially the reference count is 1, making an initial @unref
553 * necessary to allow low power states.
554 * @dump_data: return a vmalloc'ed buffer with debug data, maybe containing last
555 * TX'ed commands and similar. The buffer will be vfree'd by the caller.
556 * Note that the transport must fill in the proper file headers.
557 */
558 struct iwl_trans_ops {
559
560 int (*start_hw)(struct iwl_trans *iwl_trans, bool low_power);
561 void (*op_mode_leave)(struct iwl_trans *iwl_trans);
562 int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw,
563 bool run_in_rfkill);
564 int (*update_sf)(struct iwl_trans *trans,
565 struct iwl_sf_region *st_fwrd_space);
566 void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr);
567 void (*stop_device)(struct iwl_trans *trans, bool low_power);
568
569 void (*d3_suspend)(struct iwl_trans *trans, bool test);
570 int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status,
571 bool test);
572
573 int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
574
575 int (*tx)(struct iwl_trans *trans, struct sk_buff *skb,
576 struct iwl_device_cmd *dev_cmd, int queue);
577 void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
578 struct sk_buff_head *skbs);
579
580 void (*txq_enable)(struct iwl_trans *trans, int queue, u16 ssn,
581 const struct iwl_trans_txq_scd_cfg *cfg,
582 unsigned int queue_wdg_timeout);
583 void (*txq_disable)(struct iwl_trans *trans, int queue,
584 bool configure_scd);
585
586 int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
587 int (*wait_tx_queue_empty)(struct iwl_trans *trans, u32 txq_bm);
588 void (*freeze_txq_timer)(struct iwl_trans *trans, unsigned long txqs,
589 bool freeze);
590
591 void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val);
592 void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val);
593 u32 (*read32)(struct iwl_trans *trans, u32 ofs);
594 u32 (*read_prph)(struct iwl_trans *trans, u32 ofs);
595 void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val);
596 int (*read_mem)(struct iwl_trans *trans, u32 addr,
597 void *buf, int dwords);
598 int (*write_mem)(struct iwl_trans *trans, u32 addr,
599 const void *buf, int dwords);
600 void (*configure)(struct iwl_trans *trans,
601 const struct iwl_trans_config *trans_cfg);
602 void (*set_pmi)(struct iwl_trans *trans, bool state);
603 bool (*grab_nic_access)(struct iwl_trans *trans, bool silent,
604 unsigned long *flags);
605 void (*release_nic_access)(struct iwl_trans *trans,
606 unsigned long *flags);
607 void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask,
608 u32 value);
609 void (*ref)(struct iwl_trans *trans);
610 void (*unref)(struct iwl_trans *trans);
611 int (*suspend)(struct iwl_trans *trans);
612 void (*resume)(struct iwl_trans *trans);
613
614 struct iwl_trans_dump_data *(*dump_data)(struct iwl_trans *trans,
615 struct iwl_fw_dbg_trigger_tlv
616 *trigger);
617 };
618
619 /**
620 * enum iwl_trans_state - state of the transport layer
621 *
622 * @IWL_TRANS_NO_FW: no fw has sent an alive response
623 * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response
624 */
625 enum iwl_trans_state {
626 IWL_TRANS_NO_FW = 0,
627 IWL_TRANS_FW_ALIVE = 1,
628 };
629
630 /**
631 * enum iwl_d0i3_mode - d0i3 mode
632 *
633 * @IWL_D0I3_MODE_OFF - d0i3 is disabled
634 * @IWL_D0I3_MODE_ON_IDLE - enter d0i3 when device is idle
635 * (e.g. no active references)
636 * @IWL_D0I3_MODE_ON_SUSPEND - enter d0i3 only on suspend
637 * (in case of 'any' trigger)
638 */
639 enum iwl_d0i3_mode {
640 IWL_D0I3_MODE_OFF = 0,
641 IWL_D0I3_MODE_ON_IDLE,
642 IWL_D0I3_MODE_ON_SUSPEND,
643 };
644
645 /**
646 * struct iwl_trans - transport common data
647 *
648 * @ops - pointer to iwl_trans_ops
649 * @op_mode - pointer to the op_mode
650 * @cfg - pointer to the configuration
651 * @status: a bit-mask of transport status flags
652 * @dev - pointer to struct device * that represents the device
653 * @max_skb_frags: maximum number of fragments an SKB can have when transmitted.
654 * 0 indicates that frag SKBs (NETIF_F_SG) aren't supported.
655 * @hw_id: a u32 with the ID of the device / sub-device.
656 * Set during transport allocation.
657 * @hw_id_str: a string with info about HW ID. Set during transport allocation.
658 * @pm_support: set to true in start_hw if link pm is supported
659 * @ltr_enabled: set to true if the LTR is enabled
660 * @num_rx_queues: number of RX queues allocated by the transport;
661 * the transport must set this before calling iwl_drv_start()
662 * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
663 * The user should use iwl_trans_{alloc,free}_tx_cmd.
664 * @dev_cmd_headroom: room needed for the transport's private use before the
665 * device_cmd for Tx - for internal use only
666 * The user should use iwl_trans_{alloc,free}_tx_cmd.
667 * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before
668 * starting the firmware, used for tracing
669 * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the
670 * start of the 802.11 header in the @rx_mpdu_cmd
671 * @dflt_pwr_limit: default power limit fetched from the platform (ACPI)
672 * @dbg_dest_tlv: points to the destination TLV for debug
673 * @dbg_conf_tlv: array of pointers to configuration TLVs for debug
674 * @dbg_trigger_tlv: array of pointers to triggers TLVs for debug
675 * @dbg_dest_reg_num: num of reg_ops in %dbg_dest_tlv
676 * @paging_req_addr: The location were the FW will upload / download the pages
677 * from. The address is set by the opmode
678 * @paging_db: Pointer to the opmode paging data base, the pointer is set by
679 * the opmode.
680 * @paging_download_buf: Buffer used for copying all of the pages before
681 * downloading them to the FW. The buffer is allocated in the opmode
682 */
683 struct iwl_trans {
684 const struct iwl_trans_ops *ops;
685 struct iwl_op_mode *op_mode;
686 const struct iwl_cfg *cfg;
687 enum iwl_trans_state state;
688 unsigned long status;
689
690 struct device *dev;
691 u32 max_skb_frags;
692 u32 hw_rev;
693 u32 hw_id;
694 char hw_id_str[52];
695
696 u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;
697
698 bool pm_support;
699 bool ltr_enabled;
700
701 u8 num_rx_queues;
702
703 /* The following fields are internal only */
704 struct kmem_cache *dev_cmd_pool;
705 size_t dev_cmd_headroom;
706 char dev_cmd_pool_name[50];
707
708 struct dentry *dbgfs_dir;
709
710 #ifdef CONFIG_LOCKDEP
711 struct lockdep_map sync_cmd_lockdep_map;
712 #endif
713
714 u64 dflt_pwr_limit;
715
716 const struct iwl_fw_dbg_dest_tlv *dbg_dest_tlv;
717 const struct iwl_fw_dbg_conf_tlv *dbg_conf_tlv[FW_DBG_CONF_MAX];
718 struct iwl_fw_dbg_trigger_tlv * const *dbg_trigger_tlv;
719 u8 dbg_dest_reg_num;
720
721 /*
722 * Paging parameters - All of the parameters should be set by the
723 * opmode when paging is enabled
724 */
725 u32 paging_req_addr;
726 struct iwl_fw_paging *paging_db;
727 void *paging_download_buf;
728
729 enum iwl_d0i3_mode d0i3_mode;
730
731 bool wowlan_d0i3;
732
733 /* pointer to trans specific struct */
734 /*Ensure that this pointer will always be aligned to sizeof pointer */
735 char trans_specific[0] __aligned(sizeof(void *));
736 };
737
iwl_trans_configure(struct iwl_trans * trans,const struct iwl_trans_config * trans_cfg)738 static inline void iwl_trans_configure(struct iwl_trans *trans,
739 const struct iwl_trans_config *trans_cfg)
740 {
741 trans->op_mode = trans_cfg->op_mode;
742
743 trans->ops->configure(trans, trans_cfg);
744 }
745
_iwl_trans_start_hw(struct iwl_trans * trans,bool low_power)746 static inline int _iwl_trans_start_hw(struct iwl_trans *trans, bool low_power)
747 {
748 might_sleep();
749
750 return trans->ops->start_hw(trans, low_power);
751 }
752
iwl_trans_start_hw(struct iwl_trans * trans)753 static inline int iwl_trans_start_hw(struct iwl_trans *trans)
754 {
755 return trans->ops->start_hw(trans, true);
756 }
757
iwl_trans_op_mode_leave(struct iwl_trans * trans)758 static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans)
759 {
760 might_sleep();
761
762 if (trans->ops->op_mode_leave)
763 trans->ops->op_mode_leave(trans);
764
765 trans->op_mode = NULL;
766
767 trans->state = IWL_TRANS_NO_FW;
768 }
769
iwl_trans_fw_alive(struct iwl_trans * trans,u32 scd_addr)770 static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr)
771 {
772 might_sleep();
773
774 trans->state = IWL_TRANS_FW_ALIVE;
775
776 trans->ops->fw_alive(trans, scd_addr);
777 }
778
iwl_trans_start_fw(struct iwl_trans * trans,const struct fw_img * fw,bool run_in_rfkill)779 static inline int iwl_trans_start_fw(struct iwl_trans *trans,
780 const struct fw_img *fw,
781 bool run_in_rfkill)
782 {
783 might_sleep();
784
785 WARN_ON_ONCE(!trans->rx_mpdu_cmd);
786
787 clear_bit(STATUS_FW_ERROR, &trans->status);
788 return trans->ops->start_fw(trans, fw, run_in_rfkill);
789 }
790
iwl_trans_update_sf(struct iwl_trans * trans,struct iwl_sf_region * st_fwrd_space)791 static inline int iwl_trans_update_sf(struct iwl_trans *trans,
792 struct iwl_sf_region *st_fwrd_space)
793 {
794 might_sleep();
795
796 if (trans->ops->update_sf)
797 return trans->ops->update_sf(trans, st_fwrd_space);
798
799 return 0;
800 }
801
_iwl_trans_stop_device(struct iwl_trans * trans,bool low_power)802 static inline void _iwl_trans_stop_device(struct iwl_trans *trans,
803 bool low_power)
804 {
805 might_sleep();
806
807 trans->ops->stop_device(trans, low_power);
808
809 trans->state = IWL_TRANS_NO_FW;
810 }
811
iwl_trans_stop_device(struct iwl_trans * trans)812 static inline void iwl_trans_stop_device(struct iwl_trans *trans)
813 {
814 _iwl_trans_stop_device(trans, true);
815 }
816
iwl_trans_d3_suspend(struct iwl_trans * trans,bool test)817 static inline void iwl_trans_d3_suspend(struct iwl_trans *trans, bool test)
818 {
819 might_sleep();
820 if (trans->ops->d3_suspend)
821 trans->ops->d3_suspend(trans, test);
822 }
823
iwl_trans_d3_resume(struct iwl_trans * trans,enum iwl_d3_status * status,bool test)824 static inline int iwl_trans_d3_resume(struct iwl_trans *trans,
825 enum iwl_d3_status *status,
826 bool test)
827 {
828 might_sleep();
829 if (!trans->ops->d3_resume)
830 return 0;
831
832 return trans->ops->d3_resume(trans, status, test);
833 }
834
iwl_trans_ref(struct iwl_trans * trans)835 static inline void iwl_trans_ref(struct iwl_trans *trans)
836 {
837 if (trans->ops->ref)
838 trans->ops->ref(trans);
839 }
840
iwl_trans_unref(struct iwl_trans * trans)841 static inline void iwl_trans_unref(struct iwl_trans *trans)
842 {
843 if (trans->ops->unref)
844 trans->ops->unref(trans);
845 }
846
iwl_trans_suspend(struct iwl_trans * trans)847 static inline int iwl_trans_suspend(struct iwl_trans *trans)
848 {
849 if (!trans->ops->suspend)
850 return 0;
851
852 return trans->ops->suspend(trans);
853 }
854
iwl_trans_resume(struct iwl_trans * trans)855 static inline void iwl_trans_resume(struct iwl_trans *trans)
856 {
857 if (trans->ops->resume)
858 trans->ops->resume(trans);
859 }
860
861 static inline struct iwl_trans_dump_data *
iwl_trans_dump_data(struct iwl_trans * trans,struct iwl_fw_dbg_trigger_tlv * trigger)862 iwl_trans_dump_data(struct iwl_trans *trans,
863 struct iwl_fw_dbg_trigger_tlv *trigger)
864 {
865 if (!trans->ops->dump_data)
866 return NULL;
867 return trans->ops->dump_data(trans, trigger);
868 }
869
iwl_trans_send_cmd(struct iwl_trans * trans,struct iwl_host_cmd * cmd)870 static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
871 struct iwl_host_cmd *cmd)
872 {
873 int ret;
874
875 if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) &&
876 test_bit(STATUS_RFKILL, &trans->status)))
877 return -ERFKILL;
878
879 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
880 return -EIO;
881
882 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
883 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
884 return -EIO;
885 }
886
887 if (!(cmd->flags & CMD_ASYNC))
888 lock_map_acquire_read(&trans->sync_cmd_lockdep_map);
889
890 ret = trans->ops->send_cmd(trans, cmd);
891
892 if (!(cmd->flags & CMD_ASYNC))
893 lock_map_release(&trans->sync_cmd_lockdep_map);
894
895 return ret;
896 }
897
898 static inline struct iwl_device_cmd *
iwl_trans_alloc_tx_cmd(struct iwl_trans * trans)899 iwl_trans_alloc_tx_cmd(struct iwl_trans *trans)
900 {
901 u8 *dev_cmd_ptr = kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC);
902
903 if (unlikely(dev_cmd_ptr == NULL))
904 return NULL;
905
906 return (struct iwl_device_cmd *)
907 (dev_cmd_ptr + trans->dev_cmd_headroom);
908 }
909
iwl_trans_free_tx_cmd(struct iwl_trans * trans,struct iwl_device_cmd * dev_cmd)910 static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
911 struct iwl_device_cmd *dev_cmd)
912 {
913 u8 *dev_cmd_ptr = (u8 *)dev_cmd - trans->dev_cmd_headroom;
914
915 kmem_cache_free(trans->dev_cmd_pool, dev_cmd_ptr);
916 }
917
iwl_trans_tx(struct iwl_trans * trans,struct sk_buff * skb,struct iwl_device_cmd * dev_cmd,int queue)918 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
919 struct iwl_device_cmd *dev_cmd, int queue)
920 {
921 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
922 return -EIO;
923
924 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE))
925 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
926
927 return trans->ops->tx(trans, skb, dev_cmd, queue);
928 }
929
iwl_trans_reclaim(struct iwl_trans * trans,int queue,int ssn,struct sk_buff_head * skbs)930 static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
931 int ssn, struct sk_buff_head *skbs)
932 {
933 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE))
934 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
935
936 trans->ops->reclaim(trans, queue, ssn, skbs);
937 }
938
iwl_trans_txq_disable(struct iwl_trans * trans,int queue,bool configure_scd)939 static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue,
940 bool configure_scd)
941 {
942 trans->ops->txq_disable(trans, queue, configure_scd);
943 }
944
945 static inline void
iwl_trans_txq_enable_cfg(struct iwl_trans * trans,int queue,u16 ssn,const struct iwl_trans_txq_scd_cfg * cfg,unsigned int queue_wdg_timeout)946 iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn,
947 const struct iwl_trans_txq_scd_cfg *cfg,
948 unsigned int queue_wdg_timeout)
949 {
950 might_sleep();
951
952 if (unlikely((trans->state != IWL_TRANS_FW_ALIVE)))
953 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
954
955 trans->ops->txq_enable(trans, queue, ssn, cfg, queue_wdg_timeout);
956 }
957
iwl_trans_txq_enable(struct iwl_trans * trans,int queue,int fifo,int sta_id,int tid,int frame_limit,u16 ssn,unsigned int queue_wdg_timeout)958 static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
959 int fifo, int sta_id, int tid,
960 int frame_limit, u16 ssn,
961 unsigned int queue_wdg_timeout)
962 {
963 struct iwl_trans_txq_scd_cfg cfg = {
964 .fifo = fifo,
965 .sta_id = sta_id,
966 .tid = tid,
967 .frame_limit = frame_limit,
968 .aggregate = sta_id >= 0,
969 };
970
971 iwl_trans_txq_enable_cfg(trans, queue, ssn, &cfg, queue_wdg_timeout);
972 }
973
974 static inline
iwl_trans_ac_txq_enable(struct iwl_trans * trans,int queue,int fifo,unsigned int queue_wdg_timeout)975 void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue, int fifo,
976 unsigned int queue_wdg_timeout)
977 {
978 struct iwl_trans_txq_scd_cfg cfg = {
979 .fifo = fifo,
980 .sta_id = -1,
981 .tid = IWL_MAX_TID_COUNT,
982 .frame_limit = IWL_FRAME_LIMIT,
983 .aggregate = false,
984 };
985
986 iwl_trans_txq_enable_cfg(trans, queue, 0, &cfg, queue_wdg_timeout);
987 }
988
iwl_trans_freeze_txq_timer(struct iwl_trans * trans,unsigned long txqs,bool freeze)989 static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans,
990 unsigned long txqs,
991 bool freeze)
992 {
993 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE))
994 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
995
996 if (trans->ops->freeze_txq_timer)
997 trans->ops->freeze_txq_timer(trans, txqs, freeze);
998 }
999
iwl_trans_wait_tx_queue_empty(struct iwl_trans * trans,u32 txqs)1000 static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans,
1001 u32 txqs)
1002 {
1003 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE))
1004 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
1005
1006 return trans->ops->wait_tx_queue_empty(trans, txqs);
1007 }
1008
iwl_trans_dbgfs_register(struct iwl_trans * trans,struct dentry * dir)1009 static inline int iwl_trans_dbgfs_register(struct iwl_trans *trans,
1010 struct dentry *dir)
1011 {
1012 return trans->ops->dbgfs_register(trans, dir);
1013 }
1014
iwl_trans_write8(struct iwl_trans * trans,u32 ofs,u8 val)1015 static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1016 {
1017 trans->ops->write8(trans, ofs, val);
1018 }
1019
iwl_trans_write32(struct iwl_trans * trans,u32 ofs,u32 val)1020 static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1021 {
1022 trans->ops->write32(trans, ofs, val);
1023 }
1024
iwl_trans_read32(struct iwl_trans * trans,u32 ofs)1025 static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs)
1026 {
1027 return trans->ops->read32(trans, ofs);
1028 }
1029
iwl_trans_read_prph(struct iwl_trans * trans,u32 ofs)1030 static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs)
1031 {
1032 return trans->ops->read_prph(trans, ofs);
1033 }
1034
iwl_trans_write_prph(struct iwl_trans * trans,u32 ofs,u32 val)1035 static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs,
1036 u32 val)
1037 {
1038 return trans->ops->write_prph(trans, ofs, val);
1039 }
1040
iwl_trans_read_mem(struct iwl_trans * trans,u32 addr,void * buf,int dwords)1041 static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr,
1042 void *buf, int dwords)
1043 {
1044 return trans->ops->read_mem(trans, addr, buf, dwords);
1045 }
1046
1047 #define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize) \
1048 do { \
1049 if (__builtin_constant_p(bufsize)) \
1050 BUILD_BUG_ON((bufsize) % sizeof(u32)); \
1051 iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\
1052 } while (0)
1053
iwl_trans_read_mem32(struct iwl_trans * trans,u32 addr)1054 static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr)
1055 {
1056 u32 value;
1057
1058 if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1)))
1059 return 0xa5a5a5a5;
1060
1061 return value;
1062 }
1063
iwl_trans_write_mem(struct iwl_trans * trans,u32 addr,const void * buf,int dwords)1064 static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr,
1065 const void *buf, int dwords)
1066 {
1067 return trans->ops->write_mem(trans, addr, buf, dwords);
1068 }
1069
iwl_trans_write_mem32(struct iwl_trans * trans,u32 addr,u32 val)1070 static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr,
1071 u32 val)
1072 {
1073 return iwl_trans_write_mem(trans, addr, &val, 1);
1074 }
1075
iwl_trans_set_pmi(struct iwl_trans * trans,bool state)1076 static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state)
1077 {
1078 if (trans->ops->set_pmi)
1079 trans->ops->set_pmi(trans, state);
1080 }
1081
1082 static inline void
iwl_trans_set_bits_mask(struct iwl_trans * trans,u32 reg,u32 mask,u32 value)1083 iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value)
1084 {
1085 trans->ops->set_bits_mask(trans, reg, mask, value);
1086 }
1087
1088 #define iwl_trans_grab_nic_access(trans, silent, flags) \
1089 __cond_lock(nic_access, \
1090 likely((trans)->ops->grab_nic_access(trans, silent, flags)))
1091
__releases(nic_access)1092 static inline void __releases(nic_access)
1093 iwl_trans_release_nic_access(struct iwl_trans *trans, unsigned long *flags)
1094 {
1095 trans->ops->release_nic_access(trans, flags);
1096 __release(nic_access);
1097 }
1098
iwl_trans_fw_error(struct iwl_trans * trans)1099 static inline void iwl_trans_fw_error(struct iwl_trans *trans)
1100 {
1101 if (WARN_ON_ONCE(!trans->op_mode))
1102 return;
1103
1104 /* prevent double restarts due to the same erroneous FW */
1105 if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status))
1106 iwl_op_mode_nic_error(trans->op_mode);
1107 }
1108
1109 /*****************************************************
1110 * transport helper functions
1111 *****************************************************/
1112 struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
1113 struct device *dev,
1114 const struct iwl_cfg *cfg,
1115 const struct iwl_trans_ops *ops,
1116 size_t dev_cmd_headroom);
1117 void iwl_trans_free(struct iwl_trans *trans);
1118
1119 /*****************************************************
1120 * driver (transport) register/unregister functions
1121 ******************************************************/
1122 int __must_check iwl_pci_register_driver(void);
1123 void iwl_pci_unregister_driver(void);
1124
1125 #endif /* __iwl_trans_h__ */
1126