2 * Intel Wireless WiMAX Connection 2400m
3 * Miscellaneous control functions for managing the device
6 * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
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32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 * Intel Corporation <linux-wimax@intel.com>
36 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
37 * - Initial implementation
39 * This is a collection of functions used to control the device (plus
42 * There are utilities for handling TLV buffers, hooks on the device's
43 * reports to act on device changes of state [i2400m_report_hook()],
44 * on acks to commands [i2400m_msg_ack_hook()], a helper for sending
45 * commands to the device and blocking until a reply arrives
46 * [i2400m_msg_to_dev()], a few high level commands for manipulating
47 * the device state, powersving mode and configuration plus the
48 * routines to setup the device once communication is stablished with
49 * it [i2400m_dev_initialize()].
53 * i2400m_dev_initalize() Called by i2400m_dev_start()
54 * i2400m_set_init_config()
55 * i2400m_cmd_get_state()
56 * i2400m_dev_shutdown() Called by i2400m_dev_stop()
59 * i2400m_{cmd,get,set}_*()
61 * i2400m_msg_check_status()
63 * i2400m_report_hook() Called on reception of an event
64 * i2400m_report_state_hook()
65 * i2400m_tlv_buffer_walk()
67 * i2400m_report_tlv_system_state()
68 * i2400m_report_tlv_rf_switches_status()
69 * i2400m_report_tlv_media_status()
70 * i2400m_cmd_enter_powersave()
72 * i2400m_msg_ack_hook() Called on reception of a reply to a
78 #include <linux/kernel.h>
79 #include <linux/wimax/i2400m.h>
82 #define D_SUBMODULE control
83 #include "debug-levels.h"
87 * Return if a TLV is of a give type and size
89 * @tlv_hdr: pointer to the TLV
90 * @tlv_type: type of the TLV we are looking for
91 * @tlv_size: expected size of the TLV we are looking for (if -1,
92 * don't check the size). This includes the header
93 * Returns: 0 if the TLV matches
94 * < 0 if it doesn't match at all
95 * > 0 total TLV + payload size, if the type matches, but not
99 ssize_t
i2400m_tlv_match(const struct i2400m_tlv_hdr
*tlv
,
100 enum i2400m_tlv tlv_type
, ssize_t tlv_size
)
102 if (le16_to_cpu(tlv
->type
) != tlv_type
) /* Not our type? skip */
105 && le16_to_cpu(tlv
->length
) + sizeof(*tlv
) != tlv_size
) {
106 size_t size
= le16_to_cpu(tlv
->length
) + sizeof(*tlv
);
107 printk(KERN_WARNING
"W: tlv type 0x%x mismatched because of "
108 "size (got %zu vs %zu expected)\n",
109 tlv_type
, size
, tlv_size
);
117 * Given a buffer of TLVs, iterate over them
119 * @i2400m: device instance
120 * @tlv_buf: pointer to the beginning of the TLV buffer
121 * @buf_size: buffer size in bytes
122 * @tlv_pos: seek position; this is assumed to be a pointer returned
123 * by i2400m_tlv_buffer_walk() [and thus, validated]. The
124 * TLV returned will be the one following this one.
129 * while (tlv_itr = i2400m_tlv_buffer_walk(i2400m, buf, size, tlv_itr)) {
131 * // Do stuff with tlv_itr, DON'T MODIFY IT
136 const struct i2400m_tlv_hdr
*i2400m_tlv_buffer_walk(
137 struct i2400m
*i2400m
,
138 const void *tlv_buf
, size_t buf_size
,
139 const struct i2400m_tlv_hdr
*tlv_pos
)
141 struct device
*dev
= i2400m_dev(i2400m
);
142 const struct i2400m_tlv_hdr
*tlv_top
= tlv_buf
+ buf_size
;
143 size_t offset
, length
, avail_size
;
146 if (tlv_pos
== NULL
) /* Take the first one? */
148 else /* Nope, the next one */
149 tlv_pos
= (void *) tlv_pos
150 + le16_to_cpu(tlv_pos
->length
) + sizeof(*tlv_pos
);
151 if (tlv_pos
== tlv_top
) { /* buffer done */
153 goto error_beyond_end
;
155 if (tlv_pos
> tlv_top
) {
158 goto error_beyond_end
;
160 offset
= (void *) tlv_pos
- (void *) tlv_buf
;
161 avail_size
= buf_size
- offset
;
162 if (avail_size
< sizeof(*tlv_pos
)) {
163 dev_err(dev
, "HW BUG? tlv_buf %p [%zu bytes], tlv @%zu: "
164 "short header\n", tlv_buf
, buf_size
, offset
);
165 goto error_short_header
;
167 type
= le16_to_cpu(tlv_pos
->type
);
168 length
= le16_to_cpu(tlv_pos
->length
);
169 if (avail_size
< sizeof(*tlv_pos
) + length
) {
170 dev_err(dev
, "HW BUG? tlv_buf %p [%zu bytes], "
171 "tlv type 0x%04x @%zu: "
172 "short data (%zu bytes vs %zu needed)\n",
173 tlv_buf
, buf_size
, type
, offset
, avail_size
,
174 sizeof(*tlv_pos
) + length
);
175 goto error_short_header
;
184 * Find a TLV in a buffer of sequential TLVs
186 * @i2400m: device descriptor
187 * @tlv_hdr: pointer to the first TLV in the sequence
188 * @size: size of the buffer in bytes; all TLVs are assumed to fit
189 * fully in the buffer (otherwise we'll complain).
190 * @tlv_type: type of the TLV we are looking for
191 * @tlv_size: expected size of the TLV we are looking for (if -1,
192 * don't check the size). This includes the header
194 * Returns: NULL if the TLV is not found, otherwise a pointer to
195 * it. If the sizes don't match, an error is printed and NULL
199 const struct i2400m_tlv_hdr
*i2400m_tlv_find(
200 struct i2400m
*i2400m
,
201 const struct i2400m_tlv_hdr
*tlv_hdr
, size_t size
,
202 enum i2400m_tlv tlv_type
, ssize_t tlv_size
)
205 struct device
*dev
= i2400m_dev(i2400m
);
206 const struct i2400m_tlv_hdr
*tlv
= NULL
;
207 while ((tlv
= i2400m_tlv_buffer_walk(i2400m
, tlv_hdr
, size
, tlv
))) {
208 match
= i2400m_tlv_match(tlv
, tlv_type
, tlv_size
);
209 if (match
== 0) /* found it :) */
212 dev_warn(dev
, "TLV type 0x%04x found with size "
213 "mismatch (%zu vs %zu needed)\n",
214 tlv_type
, match
, tlv_size
);
224 } ms_to_errno
[I2400M_MS_MAX
] = {
225 [I2400M_MS_DONE_OK
] = { "", 0 },
226 [I2400M_MS_DONE_IN_PROGRESS
] = { "", 0 },
227 [I2400M_MS_INVALID_OP
] = { "invalid opcode", -ENOSYS
},
228 [I2400M_MS_BAD_STATE
] = { "invalid state", -EILSEQ
},
229 [I2400M_MS_ILLEGAL_VALUE
] = { "illegal value", -EINVAL
},
230 [I2400M_MS_MISSING_PARAMS
] = { "missing parameters", -ENOMSG
},
231 [I2400M_MS_VERSION_ERROR
] = { "bad version", -EIO
},
232 [I2400M_MS_ACCESSIBILITY_ERROR
] = { "accesibility error", -EIO
},
233 [I2400M_MS_BUSY
] = { "busy", -EBUSY
},
234 [I2400M_MS_CORRUPTED_TLV
] = { "corrupted TLV", -EILSEQ
},
235 [I2400M_MS_UNINITIALIZED
] = { "not unitialized", -EILSEQ
},
236 [I2400M_MS_UNKNOWN_ERROR
] = { "unknown error", -EIO
},
237 [I2400M_MS_PRODUCTION_ERROR
] = { "production error", -EIO
},
238 [I2400M_MS_NO_RF
] = { "no RF", -EIO
},
239 [I2400M_MS_NOT_READY_FOR_POWERSAVE
] =
240 { "not ready for powersave", -EACCES
},
241 [I2400M_MS_THERMAL_CRITICAL
] = { "thermal critical", -EL3HLT
},
246 * i2400m_msg_check_status - translate a message's status code
248 * @i2400m: device descriptor
249 * @l3l4_hdr: message header
250 * @strbuf: buffer to place a formatted error message (unless NULL).
251 * @strbuf_size: max amount of available space; larger messages will
254 * Returns: errno code corresponding to the status code in @l3l4_hdr
255 * and a message in @strbuf describing the error.
257 int i2400m_msg_check_status(const struct i2400m_l3l4_hdr
*l3l4_hdr
,
258 char *strbuf
, size_t strbuf_size
)
261 enum i2400m_ms status
= le16_to_cpu(l3l4_hdr
->status
);
266 if (status
> ARRAY_SIZE(ms_to_errno
)) {
267 str
= "unknown status code";
270 str
= ms_to_errno
[status
].msg
;
271 result
= ms_to_errno
[status
].errno
;
274 snprintf(strbuf
, strbuf_size
, "%s (%d)", str
, status
);
280 * Act on a TLV System State reported by the device
282 * @i2400m: device descriptor
283 * @ss: validated System State TLV
286 void i2400m_report_tlv_system_state(struct i2400m
*i2400m
,
287 const struct i2400m_tlv_system_state
*ss
)
289 struct device
*dev
= i2400m_dev(i2400m
);
290 struct wimax_dev
*wimax_dev
= &i2400m
->wimax_dev
;
291 enum i2400m_system_state i2400m_state
= le32_to_cpu(ss
->state
);
293 d_fnstart(3, dev
, "(i2400m %p ss %p [%u])\n", i2400m
, ss
, i2400m_state
);
295 if (unlikely(i2400m
->ready
== 0)) /* act if up */
297 if (i2400m
->state
!= i2400m_state
) {
298 i2400m
->state
= i2400m_state
;
299 wake_up_all(&i2400m
->state_wq
);
301 switch (i2400m_state
) {
302 case I2400M_SS_UNINITIALIZED
:
304 case I2400M_SS_CONFIG
:
305 case I2400M_SS_PRODUCTION
:
306 wimax_state_change(wimax_dev
, WIMAX_ST_UNINITIALIZED
);
309 case I2400M_SS_RF_OFF
:
310 case I2400M_SS_RF_SHUTDOWN
:
311 wimax_state_change(wimax_dev
, WIMAX_ST_RADIO_OFF
);
314 case I2400M_SS_READY
:
315 case I2400M_SS_STANDBY
:
316 case I2400M_SS_SLEEPACTIVE
:
317 wimax_state_change(wimax_dev
, WIMAX_ST_READY
);
320 case I2400M_SS_CONNECTING
:
321 case I2400M_SS_WIMAX_CONNECTED
:
322 wimax_state_change(wimax_dev
, WIMAX_ST_READY
);
326 case I2400M_SS_OUT_OF_ZONE
:
327 wimax_state_change(wimax_dev
, WIMAX_ST_SCANNING
);
331 d_printf(1, dev
, "entering BS-negotiated idle mode\n");
332 case I2400M_SS_DISCONNECTING
:
333 case I2400M_SS_DATA_PATH_CONNECTED
:
334 wimax_state_change(wimax_dev
, WIMAX_ST_CONNECTED
);
338 /* Huh? just in case, shut it down */
339 dev_err(dev
, "HW BUG? unknown state %u: shutting down\n",
341 i2400m
->bus_reset(i2400m
, I2400M_RT_WARM
);
345 d_fnend(3, dev
, "(i2400m %p ss %p [%u]) = void\n",
346 i2400m
, ss
, i2400m_state
);
351 * Parse and act on a TLV Media Status sent by the device
353 * @i2400m: device descriptor
354 * @ms: validated Media Status TLV
356 * This will set the carrier up on down based on the device's link
357 * report. This is done asides of what the WiMAX stack does based on
358 * the device's state as sometimes we need to do a link-renew (the BS
359 * wants us to renew a DHCP lease, for example).
361 * In fact, doc says that everytime we get a link-up, we should do a
362 * DHCP negotiation...
365 void i2400m_report_tlv_media_status(struct i2400m
*i2400m
,
366 const struct i2400m_tlv_media_status
*ms
)
368 struct device
*dev
= i2400m_dev(i2400m
);
369 struct wimax_dev
*wimax_dev
= &i2400m
->wimax_dev
;
370 struct net_device
*net_dev
= wimax_dev
->net_dev
;
371 enum i2400m_media_status status
= le32_to_cpu(ms
->media_status
);
373 d_fnstart(3, dev
, "(i2400m %p ms %p [%u])\n", i2400m
, ms
, status
);
375 if (unlikely(i2400m
->ready
== 0)) /* act if up */
378 case I2400M_MEDIA_STATUS_LINK_UP
:
379 netif_carrier_on(net_dev
);
381 case I2400M_MEDIA_STATUS_LINK_DOWN
:
382 netif_carrier_off(net_dev
);
385 * This is the network telling us we need to retrain the DHCP
386 * lease -- so far, we are trusting the WiMAX Network Service
387 * in user space to pick this up and poke the DHCP client.
389 case I2400M_MEDIA_STATUS_LINK_RENEW
:
390 netif_carrier_on(net_dev
);
393 dev_err(dev
, "HW BUG? unknown media status %u\n",
397 d_fnend(3, dev
, "(i2400m %p ms %p [%u]) = void\n",
403 * Parse a 'state report' and extract carrier on/off information
405 * @i2400m: device descriptor
406 * @l3l4_hdr: pointer to message; it has been already validated for
408 * @size: size of the message (header + payload). The header length
409 * declaration is assumed to be congruent with @size (as in
410 * sizeof(*l3l4_hdr) + l3l4_hdr->length == size)
412 * Extract from the report state the system state TLV and infer from
413 * there if we have a carrier or not. Update our local state and tell
416 * When setting the carrier, it's fine to set OFF twice (for example),
417 * as netif_carrier_off() will not generate two OFF events (just on
421 void i2400m_report_state_hook(struct i2400m
*i2400m
,
422 const struct i2400m_l3l4_hdr
*l3l4_hdr
,
423 size_t size
, const char *tag
)
425 struct device
*dev
= i2400m_dev(i2400m
);
426 const struct i2400m_tlv_hdr
*tlv
;
427 const struct i2400m_tlv_system_state
*ss
;
428 const struct i2400m_tlv_rf_switches_status
*rfss
;
429 const struct i2400m_tlv_media_status
*ms
;
430 size_t tlv_size
= le16_to_cpu(l3l4_hdr
->length
);
432 d_fnstart(4, dev
, "(i2400m %p, l3l4_hdr %p, size %zu, %s)\n",
433 i2400m
, l3l4_hdr
, size
, tag
);
436 while ((tlv
= i2400m_tlv_buffer_walk(i2400m
, &l3l4_hdr
->pl
,
438 if (0 == i2400m_tlv_match(tlv
, I2400M_TLV_SYSTEM_STATE
,
440 ss
= container_of(tlv
, typeof(*ss
), hdr
);
441 d_printf(2, dev
, "%s: system state TLV "
442 "found (0x%04x), state 0x%08x\n",
443 tag
, I2400M_TLV_SYSTEM_STATE
,
444 le32_to_cpu(ss
->state
));
445 i2400m_report_tlv_system_state(i2400m
, ss
);
447 if (0 == i2400m_tlv_match(tlv
, I2400M_TLV_RF_STATUS
,
449 rfss
= container_of(tlv
, typeof(*rfss
), hdr
);
450 d_printf(2, dev
, "%s: RF status TLV "
451 "found (0x%04x), sw 0x%02x hw 0x%02x\n",
452 tag
, I2400M_TLV_RF_STATUS
,
453 le32_to_cpu(rfss
->sw_rf_switch
),
454 le32_to_cpu(rfss
->hw_rf_switch
));
455 i2400m_report_tlv_rf_switches_status(i2400m
, rfss
);
457 if (0 == i2400m_tlv_match(tlv
, I2400M_TLV_MEDIA_STATUS
,
459 ms
= container_of(tlv
, typeof(*ms
), hdr
);
460 d_printf(2, dev
, "%s: Media Status TLV: %u\n",
461 tag
, le32_to_cpu(ms
->media_status
));
462 i2400m_report_tlv_media_status(i2400m
, ms
);
465 d_fnend(4, dev
, "(i2400m %p, l3l4_hdr %p, size %zu, %s) = void\n",
466 i2400m
, l3l4_hdr
, size
, tag
);
471 * i2400m_report_hook - (maybe) act on a report
473 * @i2400m: device descriptor
474 * @l3l4_hdr: pointer to message; it has been already validated for
476 * @size: size of the message (header + payload). The header length
477 * declaration is assumed to be congruent with @size (as in
478 * sizeof(*l3l4_hdr) + l3l4_hdr->length == size)
480 * Extract information we might need (like carrien on/off) from a
483 void i2400m_report_hook(struct i2400m
*i2400m
,
484 const struct i2400m_l3l4_hdr
*l3l4_hdr
, size_t size
)
486 struct device
*dev
= i2400m_dev(i2400m
);
489 d_fnstart(3, dev
, "(i2400m %p l3l4_hdr %p size %zu)\n",
490 i2400m
, l3l4_hdr
, size
);
491 /* Chew on the message, we might need some information from
493 msg_type
= le16_to_cpu(l3l4_hdr
->type
);
495 case I2400M_MT_REPORT_STATE
: /* carrier detection... */
496 i2400m_report_state_hook(i2400m
,
497 l3l4_hdr
, size
, "REPORT STATE");
499 /* If the device is ready for power save, then ask it to do
501 case I2400M_MT_REPORT_POWERSAVE_READY
: /* zzzzz */
502 if (l3l4_hdr
->status
== cpu_to_le16(I2400M_MS_DONE_OK
)) {
503 d_printf(1, dev
, "ready for powersave, requesting\n");
504 i2400m_cmd_enter_powersave(i2400m
);
508 d_fnend(3, dev
, "(i2400m %p l3l4_hdr %p size %zu) = void\n",
509 i2400m
, l3l4_hdr
, size
);
514 * i2400m_msg_ack_hook - process cmd/set/get ack for internal status
516 * @i2400m: device descriptor
517 * @l3l4_hdr: pointer to message; it has been already validated for
519 * @size: size of the message
521 * Extract information we might need from acks to commands and act on
522 * it. This is akin to i2400m_report_hook(). Note most of this
523 * processing should be done in the function that calls the
524 * command. This is here for some cases where it can't happen...
526 void i2400m_msg_ack_hook(struct i2400m
*i2400m
,
527 const struct i2400m_l3l4_hdr
*l3l4_hdr
, size_t size
)
530 struct device
*dev
= i2400m_dev(i2400m
);
531 unsigned ack_type
, ack_status
;
534 /* Chew on the message, we might need some information from
536 ack_type
= le16_to_cpu(l3l4_hdr
->type
);
537 ack_status
= le16_to_cpu(l3l4_hdr
->status
);
539 case I2400M_MT_CMD_ENTER_POWERSAVE
:
540 /* This is just left here for the sake of example, as
541 * the processing is done somewhere else. */
543 result
= i2400m_msg_check_status(
544 l3l4_hdr
, strerr
, sizeof(strerr
));
546 d_printf(1, dev
, "ready for power save: %zd\n",
556 * i2400m_msg_size_check() - verify message size and header are congruent
558 * It is ok if the total message size is larger than the expected
559 * size, as there can be padding.
561 int i2400m_msg_size_check(struct i2400m
*i2400m
,
562 const struct i2400m_l3l4_hdr
*l3l4_hdr
,
566 struct device
*dev
= i2400m_dev(i2400m
);
567 size_t expected_size
;
568 d_fnstart(4, dev
, "(i2400m %p l3l4_hdr %p msg_size %zu)\n",
569 i2400m
, l3l4_hdr
, msg_size
);
570 if (msg_size
< sizeof(*l3l4_hdr
)) {
571 dev_err(dev
, "bad size for message header "
572 "(expected at least %zu, got %zu)\n",
573 (size_t) sizeof(*l3l4_hdr
), msg_size
);
577 expected_size
= le16_to_cpu(l3l4_hdr
->length
) + sizeof(*l3l4_hdr
);
578 if (msg_size
< expected_size
) {
579 dev_err(dev
, "bad size for message code 0x%04x (expected %zu, "
580 "got %zu)\n", le16_to_cpu(l3l4_hdr
->type
),
581 expected_size
, msg_size
);
587 "(i2400m %p l3l4_hdr %p msg_size %zu) = %d\n",
588 i2400m
, l3l4_hdr
, msg_size
, result
);
595 * Cancel a wait for a command ACK
597 * @i2400m: device descriptor
598 * @code: [negative] errno code to cancel with (don't use
601 * If there is an ack already filled out, free it.
603 void i2400m_msg_to_dev_cancel_wait(struct i2400m
*i2400m
, int code
)
605 struct sk_buff
*ack_skb
;
608 spin_lock_irqsave(&i2400m
->rx_lock
, flags
);
609 ack_skb
= i2400m
->ack_skb
;
610 if (ack_skb
&& !IS_ERR(ack_skb
))
612 i2400m
->ack_skb
= ERR_PTR(code
);
613 spin_unlock_irqrestore(&i2400m
->rx_lock
, flags
);
618 * i2400m_msg_to_dev - Send a control message to the device and get a response
620 * @i2400m: device descriptor
624 * @buf: pointer to the buffer containing the message to be sent; it
625 * has to start with a &struct i2400M_l3l4_hdr and then
626 * followed by the payload. Once this function returns, the
627 * buffer can be reused.
629 * @buf_len: buffer size
633 * Pointer to skb containing the ack message. You need to check the
634 * pointer with IS_ERR(), as it might be an error code. Error codes
635 * could happen because:
637 * - the message wasn't formatted correctly
638 * - couldn't send the message
639 * - failed waiting for a response
640 * - the ack message wasn't formatted correctly
642 * The returned skb has been allocated with wimax_msg_to_user_alloc(),
643 * it contains the reponse in a netlink attribute and is ready to be
644 * passed up to user space with wimax_msg_to_user_send(). To access
645 * the payload and its length, use wimax_msg_{data,len}() on the skb.
647 * The skb has to be freed with kfree_skb() once done.
651 * This function delivers a message/command to the device and waits
652 * for an ack to be received. The format is described in
653 * linux/wimax/i2400m.h. In summary, a command/get/set is followed by an
656 * This function will not check the ack status, that's left up to the
657 * caller. Once done with the ack skb, it has to be kfree_skb()ed.
659 * The i2400m handles only one message at the same time, thus we need
660 * the mutex to exclude other players.
662 * We write the message and then wait for an answer to come back. The
663 * RX path intercepts control messages and handles them in
664 * i2400m_rx_ctl(). Reports (notifications) are (maybe) processed
665 * locally and then forwarded (as needed) to user space on the WiMAX
666 * stack message pipe. Acks are saved and passed back to us through an
667 * skb in i2400m->ack_skb which is ready to be given to generic
668 * netlink if need be.
670 struct sk_buff
*i2400m_msg_to_dev(struct i2400m
*i2400m
,
671 const void *buf
, size_t buf_len
)
674 struct device
*dev
= i2400m_dev(i2400m
);
675 const struct i2400m_l3l4_hdr
*msg_l3l4_hdr
;
676 struct sk_buff
*ack_skb
;
677 const struct i2400m_l3l4_hdr
*ack_l3l4_hdr
;
683 d_fnstart(3, dev
, "(i2400m %p buf %p len %zu)\n",
684 i2400m
, buf
, buf_len
);
686 if (i2400m
->boot_mode
)
687 return ERR_PTR(-ENODEV
);
690 /* Check msg & payload consistency */
691 result
= i2400m_msg_size_check(i2400m
, msg_l3l4_hdr
, buf_len
);
694 msg_type
= le16_to_cpu(msg_l3l4_hdr
->type
);
695 d_printf(1, dev
, "CMD/GET/SET 0x%04x %zu bytes\n",
697 d_dump(2, dev
, buf
, buf_len
);
699 /* Setup the completion, ack_skb ("we are waiting") and send
700 * the message to the device */
701 mutex_lock(&i2400m
->msg_mutex
);
702 spin_lock_irqsave(&i2400m
->rx_lock
, flags
);
703 i2400m
->ack_skb
= ERR_PTR(-EINPROGRESS
);
704 spin_unlock_irqrestore(&i2400m
->rx_lock
, flags
);
705 init_completion(&i2400m
->msg_completion
);
706 result
= i2400m_tx(i2400m
, buf
, buf_len
, I2400M_PT_CTRL
);
708 dev_err(dev
, "can't send message 0x%04x: %d\n",
709 le16_to_cpu(msg_l3l4_hdr
->type
), result
);
713 /* Some commands take longer to execute because of crypto ops,
714 * so we give them some more leeway on timeout */
716 case I2400M_MT_GET_TLS_OPERATION_RESULT
:
717 case I2400M_MT_CMD_SEND_EAP_RESPONSE
:
718 ack_timeout
= 5 * HZ
;
724 /* The RX path in rx.c will put any response for this message
725 * in i2400m->ack_skb and wake us up. If we cancel the wait,
726 * we need to change the value of i2400m->ack_skb to something
727 * not -EINPROGRESS so RX knows there is no one waiting. */
728 result
= wait_for_completion_interruptible_timeout(
729 &i2400m
->msg_completion
, ack_timeout
);
731 dev_err(dev
, "timeout waiting for reply to message 0x%04x\n",
734 i2400m_msg_to_dev_cancel_wait(i2400m
, result
);
735 goto error_wait_for_completion
;
736 } else if (result
< 0) {
737 dev_err(dev
, "error waiting for reply to message 0x%04x: %d\n",
739 i2400m_msg_to_dev_cancel_wait(i2400m
, result
);
740 goto error_wait_for_completion
;
743 /* Pull out the ack data from i2400m->ack_skb -- see if it is
744 * an error and act accordingly */
745 spin_lock_irqsave(&i2400m
->rx_lock
, flags
);
746 ack_skb
= i2400m
->ack_skb
;
748 result
= PTR_ERR(ack_skb
);
751 i2400m
->ack_skb
= NULL
;
752 spin_unlock_irqrestore(&i2400m
->rx_lock
, flags
);
754 goto error_ack_status
;
755 ack_l3l4_hdr
= wimax_msg_data_len(ack_skb
, &ack_len
);
757 /* Check the ack and deliver it if it is ok */
758 result
= i2400m_msg_size_check(i2400m
, ack_l3l4_hdr
, ack_len
);
760 dev_err(dev
, "HW BUG? reply to message 0x%04x: %d\n",
762 goto error_bad_ack_len
;
764 if (msg_type
!= le16_to_cpu(ack_l3l4_hdr
->type
)) {
765 dev_err(dev
, "HW BUG? bad reply 0x%04x to message 0x%04x\n",
766 le16_to_cpu(ack_l3l4_hdr
->type
), msg_type
);
768 goto error_bad_ack_type
;
770 i2400m_msg_ack_hook(i2400m
, ack_l3l4_hdr
, ack_len
);
771 mutex_unlock(&i2400m
->msg_mutex
);
772 d_fnend(3, dev
, "(i2400m %p buf %p len %zu) = %p\n",
773 i2400m
, buf
, buf_len
, ack_skb
);
780 error_wait_for_completion
:
782 mutex_unlock(&i2400m
->msg_mutex
);
784 d_fnend(3, dev
, "(i2400m %p buf %p len %zu) = %d\n",
785 i2400m
, buf
, buf_len
, result
);
786 return ERR_PTR(result
);
791 * Definitions for the Enter Power Save command
793 * The Enter Power Save command requests the device to go into power
794 * saving mode. The device will ack or nak the command depending on it
795 * being ready for it. If it acks, we tell the USB subsystem to
797 * As well, the device might request to go into power saving mode by
798 * sending a report (REPORT_POWERSAVE_READY), in which case, we issue
799 * this command. The hookups in the RX coder allow
802 I2400M_WAKEUP_ENABLED
= 0x01,
803 I2400M_WAKEUP_DISABLED
= 0x02,
804 I2400M_TLV_TYPE_WAKEUP_MODE
= 144,
807 struct i2400m_cmd_enter_power_save
{
808 struct i2400m_l3l4_hdr hdr
;
809 struct i2400m_tlv_hdr tlv
;
811 } __attribute__((packed
));
815 * Request entering power save
817 * This command is (mainly) executed when the device indicates that it
818 * is ready to go into powersave mode via a REPORT_POWERSAVE_READY.
820 int i2400m_cmd_enter_powersave(struct i2400m
*i2400m
)
823 struct device
*dev
= i2400m_dev(i2400m
);
824 struct sk_buff
*ack_skb
;
825 struct i2400m_cmd_enter_power_save
*cmd
;
829 cmd
= kzalloc(sizeof(*cmd
), GFP_KERNEL
);
832 cmd
->hdr
.type
= cpu_to_le16(I2400M_MT_CMD_ENTER_POWERSAVE
);
833 cmd
->hdr
.length
= cpu_to_le16(sizeof(*cmd
) - sizeof(cmd
->hdr
));
834 cmd
->hdr
.version
= cpu_to_le16(I2400M_L3L4_VERSION
);
835 cmd
->tlv
.type
= cpu_to_le16(I2400M_TLV_TYPE_WAKEUP_MODE
);
836 cmd
->tlv
.length
= cpu_to_le16(sizeof(cmd
->val
));
837 cmd
->val
= cpu_to_le32(I2400M_WAKEUP_ENABLED
);
839 ack_skb
= i2400m_msg_to_dev(i2400m
, cmd
, sizeof(*cmd
));
840 result
= PTR_ERR(ack_skb
);
841 if (IS_ERR(ack_skb
)) {
842 dev_err(dev
, "Failed to issue 'Enter power save' command: %d\n",
844 goto error_msg_to_dev
;
846 result
= i2400m_msg_check_status(wimax_msg_data(ack_skb
),
847 strerr
, sizeof(strerr
));
848 if (result
== -EACCES
)
849 d_printf(1, dev
, "Cannot enter power save mode\n");
851 dev_err(dev
, "'Enter power save' (0x%04x) command failed: "
852 "%d - %s\n", I2400M_MT_CMD_ENTER_POWERSAVE
,
855 d_printf(1, dev
, "device ready to power save\n");
862 EXPORT_SYMBOL_GPL(i2400m_cmd_enter_powersave
);
866 * Definitions for getting device information
869 I2400M_TLV_DETAILED_DEVICE_INFO
= 140
873 * i2400m_get_device_info - Query the device for detailed device information
875 * @i2400m: device descriptor
877 * Returns: an skb whose skb->data points to a 'struct
878 * i2400m_tlv_detailed_device_info'. When done, kfree_skb() it. The
879 * skb is *guaranteed* to contain the whole TLV data structure.
881 * On error, IS_ERR(skb) is true and ERR_PTR(skb) is the error
884 struct sk_buff
*i2400m_get_device_info(struct i2400m
*i2400m
)
887 struct device
*dev
= i2400m_dev(i2400m
);
888 struct sk_buff
*ack_skb
;
889 struct i2400m_l3l4_hdr
*cmd
;
890 const struct i2400m_l3l4_hdr
*ack
;
892 const struct i2400m_tlv_hdr
*tlv
;
893 const struct i2400m_tlv_detailed_device_info
*ddi
;
896 ack_skb
= ERR_PTR(-ENOMEM
);
897 cmd
= kzalloc(sizeof(*cmd
), GFP_KERNEL
);
900 cmd
->type
= cpu_to_le16(I2400M_MT_GET_DEVICE_INFO
);
902 cmd
->version
= cpu_to_le16(I2400M_L3L4_VERSION
);
904 ack_skb
= i2400m_msg_to_dev(i2400m
, cmd
, sizeof(*cmd
));
905 if (IS_ERR(ack_skb
)) {
906 dev_err(dev
, "Failed to issue 'get device info' command: %ld\n",
908 goto error_msg_to_dev
;
910 ack
= wimax_msg_data_len(ack_skb
, &ack_len
);
911 result
= i2400m_msg_check_status(ack
, strerr
, sizeof(strerr
));
913 dev_err(dev
, "'get device info' (0x%04x) command failed: "
914 "%d - %s\n", I2400M_MT_GET_DEVICE_INFO
, result
,
916 goto error_cmd_failed
;
918 tlv
= i2400m_tlv_find(i2400m
, ack
->pl
, ack_len
- sizeof(*ack
),
919 I2400M_TLV_DETAILED_DEVICE_INFO
, sizeof(*ddi
));
921 dev_err(dev
, "GET DEVICE INFO: "
922 "detailed device info TLV not found (0x%04x)\n",
923 I2400M_TLV_DETAILED_DEVICE_INFO
);
927 skb_pull(ack_skb
, (void *) tlv
- (void *) ack_skb
->data
);
937 return ERR_PTR(result
);
941 /* Firmware interface versions we support */
943 I2400M_HDIv_MAJOR
= 9,
944 I2400M_HDIv_MINOR
= 1,
945 I2400M_HDIv_MINOR_2
= 2,
950 * i2400m_firmware_check - check firmware versions are compatible with
953 * @i2400m: device descriptor
955 * Returns: 0 if ok, < 0 errno code an error and a message in the
958 * Long function, but quite simple; first chunk launches the command
959 * and double checks the reply for the right TLV. Then we process the
960 * TLV (where the meat is).
962 * Once we process the TLV that gives us the firmware's interface
963 * version, we encode it and save it in i2400m->fw_version for future
966 int i2400m_firmware_check(struct i2400m
*i2400m
)
969 struct device
*dev
= i2400m_dev(i2400m
);
970 struct sk_buff
*ack_skb
;
971 struct i2400m_l3l4_hdr
*cmd
;
972 const struct i2400m_l3l4_hdr
*ack
;
974 const struct i2400m_tlv_hdr
*tlv
;
975 const struct i2400m_tlv_l4_message_versions
*l4mv
;
977 unsigned major
, minor
, branch
;
980 cmd
= kzalloc(sizeof(*cmd
), GFP_KERNEL
);
983 cmd
->type
= cpu_to_le16(I2400M_MT_GET_LM_VERSION
);
985 cmd
->version
= cpu_to_le16(I2400M_L3L4_VERSION
);
987 ack_skb
= i2400m_msg_to_dev(i2400m
, cmd
, sizeof(*cmd
));
988 if (IS_ERR(ack_skb
)) {
989 result
= PTR_ERR(ack_skb
);
990 dev_err(dev
, "Failed to issue 'get lm version' command: %-d\n",
992 goto error_msg_to_dev
;
994 ack
= wimax_msg_data_len(ack_skb
, &ack_len
);
995 result
= i2400m_msg_check_status(ack
, strerr
, sizeof(strerr
));
997 dev_err(dev
, "'get lm version' (0x%04x) command failed: "
998 "%d - %s\n", I2400M_MT_GET_LM_VERSION
, result
,
1000 goto error_cmd_failed
;
1002 tlv
= i2400m_tlv_find(i2400m
, ack
->pl
, ack_len
- sizeof(*ack
),
1003 I2400M_TLV_L4_MESSAGE_VERSIONS
, sizeof(*l4mv
));
1005 dev_err(dev
, "get lm version: TLV not found (0x%04x)\n",
1006 I2400M_TLV_L4_MESSAGE_VERSIONS
);
1010 l4mv
= container_of(tlv
, typeof(*l4mv
), hdr
);
1011 major
= le16_to_cpu(l4mv
->major
);
1012 minor
= le16_to_cpu(l4mv
->minor
);
1013 branch
= le16_to_cpu(l4mv
->branch
);
1015 if (major
!= I2400M_HDIv_MAJOR
) {
1016 dev_err(dev
, "unsupported major fw version "
1017 "%u.%u.%u\n", major
, minor
, branch
);
1018 goto error_bad_major
;
1021 if (minor
< I2400M_HDIv_MINOR_2
&& minor
> I2400M_HDIv_MINOR
)
1022 dev_warn(dev
, "untested minor fw version %u.%u.%u\n",
1023 major
, minor
, branch
);
1024 /* Yes, we ignore the branch -- we don't have to track it */
1025 i2400m
->fw_version
= major
<< 16 | minor
;
1026 dev_info(dev
, "firmware interface version %u.%u.%u\n",
1027 major
, minor
, branch
);
1040 * Send an DoExitIdle command to the device to ask it to go out of
1041 * basestation-idle mode.
1043 * @i2400m: device descriptor
1045 * This starts a renegotiation with the basestation that might involve
1046 * another crypto handshake with user space.
1048 * Returns: 0 if ok, < 0 errno code on error.
1050 int i2400m_cmd_exit_idle(struct i2400m
*i2400m
)
1053 struct device
*dev
= i2400m_dev(i2400m
);
1054 struct sk_buff
*ack_skb
;
1055 struct i2400m_l3l4_hdr
*cmd
;
1059 cmd
= kzalloc(sizeof(*cmd
), GFP_KERNEL
);
1062 cmd
->type
= cpu_to_le16(I2400M_MT_CMD_EXIT_IDLE
);
1064 cmd
->version
= cpu_to_le16(I2400M_L3L4_VERSION
);
1066 ack_skb
= i2400m_msg_to_dev(i2400m
, cmd
, sizeof(*cmd
));
1067 result
= PTR_ERR(ack_skb
);
1068 if (IS_ERR(ack_skb
)) {
1069 dev_err(dev
, "Failed to issue 'exit idle' command: %d\n",
1071 goto error_msg_to_dev
;
1073 result
= i2400m_msg_check_status(wimax_msg_data(ack_skb
),
1074 strerr
, sizeof(strerr
));
1085 * Query the device for its state, update the WiMAX stack's idea of it
1087 * @i2400m: device descriptor
1089 * Returns: 0 if ok, < 0 errno code on error.
1091 * Executes a 'Get State' command and parses the returned
1094 * Because this is almost identical to a 'Report State', we use
1095 * i2400m_report_state_hook() to parse the answer. This will set the
1096 * carrier state, as well as the RF Kill switches state.
1098 int i2400m_cmd_get_state(struct i2400m
*i2400m
)
1101 struct device
*dev
= i2400m_dev(i2400m
);
1102 struct sk_buff
*ack_skb
;
1103 struct i2400m_l3l4_hdr
*cmd
;
1104 const struct i2400m_l3l4_hdr
*ack
;
1109 cmd
= kzalloc(sizeof(*cmd
), GFP_KERNEL
);
1112 cmd
->type
= cpu_to_le16(I2400M_MT_GET_STATE
);
1114 cmd
->version
= cpu_to_le16(I2400M_L3L4_VERSION
);
1116 ack_skb
= i2400m_msg_to_dev(i2400m
, cmd
, sizeof(*cmd
));
1117 if (IS_ERR(ack_skb
)) {
1118 dev_err(dev
, "Failed to issue 'get state' command: %ld\n",
1120 result
= PTR_ERR(ack_skb
);
1121 goto error_msg_to_dev
;
1123 ack
= wimax_msg_data_len(ack_skb
, &ack_len
);
1124 result
= i2400m_msg_check_status(ack
, strerr
, sizeof(strerr
));
1126 dev_err(dev
, "'get state' (0x%04x) command failed: "
1127 "%d - %s\n", I2400M_MT_GET_STATE
, result
, strerr
);
1128 goto error_cmd_failed
;
1130 i2400m_report_state_hook(i2400m
, ack
, ack_len
- sizeof(*ack
),
1140 EXPORT_SYMBOL_GPL(i2400m_cmd_get_state
);
1144 * Set basic configuration settings
1146 * @i2400m: device descriptor
1147 * @args: array of pointers to the TLV headers to send for
1148 * configuration (each followed by its payload).
1149 * TLV headers and payloads must be properly initialized, with the
1150 * right endianess (LE).
1151 * @arg_size: number of pointers in the @args array
1153 int i2400m_set_init_config(struct i2400m
*i2400m
,
1154 const struct i2400m_tlv_hdr
**arg
, size_t args
)
1157 struct device
*dev
= i2400m_dev(i2400m
);
1158 struct sk_buff
*ack_skb
;
1159 struct i2400m_l3l4_hdr
*cmd
;
1161 unsigned argc
, argsize
, tlv_size
;
1162 const struct i2400m_tlv_hdr
*tlv_hdr
;
1165 d_fnstart(3, dev
, "(i2400m %p arg %p args %zu)\n", i2400m
, arg
, args
);
1169 /* Compute the size of all the TLVs, so we can alloc a
1170 * contiguous command block to copy them. */
1172 for (argc
= 0; argc
< args
; argc
++) {
1173 tlv_hdr
= arg
[argc
];
1174 argsize
+= sizeof(*tlv_hdr
) + le16_to_cpu(tlv_hdr
->length
);
1176 WARN_ON(argc
>= 9); /* As per hw spec */
1178 /* Alloc the space for the command and TLVs*/
1180 buf
= kzalloc(sizeof(*cmd
) + argsize
, GFP_KERNEL
);
1184 cmd
->type
= cpu_to_le16(I2400M_MT_SET_INIT_CONFIG
);
1185 cmd
->length
= cpu_to_le16(argsize
);
1186 cmd
->version
= cpu_to_le16(I2400M_L3L4_VERSION
);
1189 itr
= buf
+ sizeof(*cmd
);
1190 for (argc
= 0; argc
< args
; argc
++) {
1191 tlv_hdr
= arg
[argc
];
1192 tlv_size
= sizeof(*tlv_hdr
) + le16_to_cpu(tlv_hdr
->length
);
1193 memcpy(itr
, tlv_hdr
, tlv_size
);
1197 /* Send the message! */
1198 ack_skb
= i2400m_msg_to_dev(i2400m
, buf
, sizeof(*cmd
) + argsize
);
1199 result
= PTR_ERR(ack_skb
);
1200 if (IS_ERR(ack_skb
)) {
1201 dev_err(dev
, "Failed to issue 'init config' command: %d\n",
1204 goto error_msg_to_dev
;
1206 result
= i2400m_msg_check_status(wimax_msg_data(ack_skb
),
1207 strerr
, sizeof(strerr
));
1209 dev_err(dev
, "'init config' (0x%04x) command failed: %d - %s\n",
1210 I2400M_MT_SET_INIT_CONFIG
, result
, strerr
);
1216 d_fnend(3, dev
, "(i2400m %p arg %p args %zu) = %d\n",
1217 i2400m
, arg
, args
, result
);
1221 EXPORT_SYMBOL_GPL(i2400m_set_init_config
);
1225 * i2400m_set_idle_timeout - Set the device's idle mode timeout
1227 * @i2400m: i2400m device descriptor
1229 * @msecs: milliseconds for the timeout to enter idle mode. Between
1230 * 100 to 300000 (5m); 0 to disable. In increments of 100.
1232 * After this @msecs of the link being idle (no data being sent or
1233 * received), the device will negotiate with the basestation entering
1234 * idle mode for saving power. The connection is maintained, but
1235 * getting out of it (done in tx.c) will require some negotiation,
1236 * possible crypto re-handshake and a possible DHCP re-lease.
1238 * Only available if fw_version >= 0x00090002.
1240 * Returns: 0 if ok, < 0 errno code on error.
1242 int i2400m_set_idle_timeout(struct i2400m
*i2400m
, unsigned msecs
)
1245 struct device
*dev
= i2400m_dev(i2400m
);
1246 struct sk_buff
*ack_skb
;
1248 struct i2400m_l3l4_hdr hdr
;
1249 struct i2400m_tlv_config_idle_timeout cit
;
1251 const struct i2400m_l3l4_hdr
*ack
;
1256 if (i2400m_le_v1_3(i2400m
))
1259 cmd
= kzalloc(sizeof(*cmd
), GFP_KERNEL
);
1262 cmd
->hdr
.type
= cpu_to_le16(I2400M_MT_GET_STATE
);
1263 cmd
->hdr
.length
= cpu_to_le16(sizeof(*cmd
) - sizeof(cmd
->hdr
));
1264 cmd
->hdr
.version
= cpu_to_le16(I2400M_L3L4_VERSION
);
1267 cpu_to_le16(I2400M_TLV_CONFIG_IDLE_TIMEOUT
);
1268 cmd
->cit
.hdr
.length
= cpu_to_le16(sizeof(cmd
->cit
.timeout
));
1269 cmd
->cit
.timeout
= cpu_to_le32(msecs
);
1271 ack_skb
= i2400m_msg_to_dev(i2400m
, cmd
, sizeof(*cmd
));
1272 if (IS_ERR(ack_skb
)) {
1273 dev_err(dev
, "Failed to issue 'set idle timeout' command: "
1274 "%ld\n", PTR_ERR(ack_skb
));
1275 result
= PTR_ERR(ack_skb
);
1276 goto error_msg_to_dev
;
1278 ack
= wimax_msg_data_len(ack_skb
, &ack_len
);
1279 result
= i2400m_msg_check_status(ack
, strerr
, sizeof(strerr
));
1281 dev_err(dev
, "'set idle timeout' (0x%04x) command failed: "
1282 "%d - %s\n", I2400M_MT_GET_STATE
, result
, strerr
);
1283 goto error_cmd_failed
;
1296 * i2400m_dev_initialize - Initialize the device once communications are ready
1298 * @i2400m: device descriptor
1300 * Returns: 0 if ok, < 0 errno code on error.
1302 * Configures the device to work the way we like it.
1304 * At the point of this call, the device is registered with the WiMAX
1305 * and netdev stacks, firmware is uploaded and we can talk to the
1308 int i2400m_dev_initialize(struct i2400m
*i2400m
)
1311 struct device
*dev
= i2400m_dev(i2400m
);
1312 struct i2400m_tlv_config_idle_parameters idle_params
;
1313 struct i2400m_tlv_config_idle_timeout idle_timeout
;
1314 const struct i2400m_tlv_hdr
*args
[9];
1317 d_fnstart(3, dev
, "(i2400m %p)\n", i2400m
);
1318 if (i2400m_idle_mode_disabled
) {
1319 if (i2400m_le_v1_3(i2400m
)) {
1320 idle_params
.hdr
.type
=
1321 cpu_to_le16(I2400M_TLV_CONFIG_IDLE_PARAMETERS
);
1322 idle_params
.hdr
.length
= cpu_to_le16(
1323 sizeof(idle_params
) - sizeof(idle_params
.hdr
));
1324 idle_params
.idle_timeout
= 0;
1325 idle_params
.idle_paging_interval
= 0;
1326 args
[argc
++] = &idle_params
.hdr
;
1328 idle_timeout
.hdr
.type
=
1329 cpu_to_le16(I2400M_TLV_CONFIG_IDLE_TIMEOUT
);
1330 idle_timeout
.hdr
.length
= cpu_to_le16(
1331 sizeof(idle_timeout
) - sizeof(idle_timeout
.hdr
));
1332 idle_timeout
.timeout
= 0;
1333 args
[argc
++] = &idle_timeout
.hdr
;
1336 result
= i2400m_set_init_config(i2400m
, args
, argc
);
1340 * Update state: Here it just calls a get state; parsing the
1341 * result (System State TLV and RF Status TLV [done in the rx
1342 * path hooks]) will set the hardware and software RF-Kill
1345 result
= i2400m_cmd_get_state(i2400m
);
1348 dev_err(dev
, "failed to initialize the device: %d\n", result
);
1349 d_fnend(3, dev
, "(i2400m %p) = %d\n", i2400m
, result
);
1355 * i2400m_dev_shutdown - Shutdown a running device
1357 * @i2400m: device descriptor
1359 * Gracefully stops the device, moving it to the lowest power
1360 * consumption state possible.
1362 void i2400m_dev_shutdown(struct i2400m
*i2400m
)
1364 int result
= -ENODEV
;
1365 struct device
*dev
= i2400m_dev(i2400m
);
1367 d_fnstart(3, dev
, "(i2400m %p)\n", i2400m
);
1368 result
= i2400m
->bus_reset(i2400m
, I2400M_RT_WARM
);
1369 d_fnend(3, dev
, "(i2400m %p) = void [%d]\n", i2400m
, result
);