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635d2b00 GKH |
1 | /***************************************************************************** |
2 | ||
95edd09e | 3 | (c) Cambridge Silicon Radio Limited 2012 |
635d2b00 GKH |
4 | All rights reserved and confidential information of CSR |
5 | ||
6 | Refer to LICENSE.txt included with this source for details | |
7 | on the license terms. | |
8 | ||
9 | *****************************************************************************/ | |
10 | ||
11 | /* | |
12 | * --------------------------------------------------------------------------- | |
13 | * FILE: csr_wifi_hip_card_sdio_intr.c | |
14 | * | |
15 | * PURPOSE: | |
16 | * Interrupt processing for the UniFi SDIO driver. | |
17 | * | |
18 | * We may need another signal queue of responses to UniFi to hold | |
19 | * bulk data commands generated by read_to_host_signals(). | |
20 | * | |
21 | * --------------------------------------------------------------------------- | |
22 | */ | |
23 | #undef CSR_WIFI_HIP_NOISY | |
24 | ||
25 | #include "csr_wifi_hip_unifi.h" | |
26 | #include "csr_wifi_hip_conversions.h" | |
27 | #include "csr_wifi_hip_card.h" | |
28 | #include "csr_wifi_hip_xbv.h" | |
29 | ||
30 | ||
31 | /* | |
32 | * If the SDIO link is idle for this time (in milliseconds), | |
33 | * signal UniFi to go into Deep Sleep. | |
34 | * Valid return value of unifi_bh(). | |
35 | */ | |
36 | #define UNIFI_DEFAULT_HOST_IDLE_TIMEOUT 5 | |
37 | /* | |
38 | * If the UniFi has not woken up for this time (in milliseconds), | |
39 | * signal the bottom half to take action. | |
40 | * Valid return value of unifi_bh(). | |
41 | */ | |
42 | #define UNIFI_DEFAULT_WAKE_TIMEOUT 1000 | |
43 | ||
44 | ||
45 | static CsrResult process_bh(card_t *card); | |
5379b13d | 46 | static CsrResult handle_host_protocol(card_t *card, u8 *processed_something); |
635d2b00 GKH |
47 | |
48 | static CsrResult flush_fh_buffer(card_t *card); | |
49 | ||
95e326c2 | 50 | static CsrResult check_fh_sig_slots(card_t *card, u16 needed, s32 *space); |
635d2b00 | 51 | |
95e326c2 GKH |
52 | static CsrResult read_to_host_signals(card_t *card, s32 *processed); |
53 | static CsrResult process_to_host_signals(card_t *card, s32 *processed); | |
635d2b00 GKH |
54 | |
55 | static CsrResult process_bulk_data_command(card_t *card, | |
7e6f5794 | 56 | const u8 *cmdptr, |
ab2b8c73 | 57 | s16 cmd, u16 len); |
635d2b00 | 58 | static CsrResult process_clear_slot_command(card_t *card, |
7e6f5794 | 59 | const u8 *cmdptr); |
95e326c2 GKH |
60 | static CsrResult process_fh_cmd_queue(card_t *card, s32 *processed); |
61 | static CsrResult process_fh_traffic_queue(card_t *card, s32 *processed); | |
635d2b00 GKH |
62 | static void restart_packet_flow(card_t *card); |
63 | static CsrResult process_clock_request(card_t *card); | |
64 | ||
65 | #ifdef CSR_WIFI_HIP_NOISY | |
ab2b8c73 | 66 | s16 dump_fh_buf = 0; |
635d2b00 GKH |
67 | #endif /* CSR_WIFI_HIP_NOISY */ |
68 | ||
69 | #ifdef CSR_WIFI_HIP_DEBUG_OFFLINE | |
70 | ||
71 | /* | |
72 | * The unifi_debug_output buffer can be used to debug the HIP behaviour offline | |
73 | * i.e. without using the tracing functions that change the timing. | |
74 | * | |
75 | * Call unifi_debug_log_to_buf() with printf arguments to store a string into | |
76 | * unifi_debug_output. When unifi_debug_buf_dump() is called, the contents of the | |
77 | * buffer are dumped with dump_str() which has to be implemented in the | |
78 | * OS layer, during the porting exercise. The offset printed, holds the | |
79 | * offset where the last character is (always a zero). | |
80 | * | |
81 | */ | |
82 | ||
83 | #define UNIFI_DEBUG_GBUFFER_SIZE 8192 | |
c781b96b GKH |
84 | static char unifi_debug_output[UNIFI_DEBUG_GBUFFER_SIZE]; |
85 | static char *unifi_dbgbuf_ptr = unifi_debug_output; | |
86 | static char *unifi_dbgbuf_start = unifi_debug_output; | |
635d2b00 | 87 | |
c781b96b | 88 | static void append_char(char c) |
635d2b00 GKH |
89 | { |
90 | /* write char and advance pointer */ | |
91 | *unifi_dbgbuf_ptr++ = c; | |
92 | /* wrap pointer at end of buffer */ | |
93 | if ((unifi_dbgbuf_ptr - unifi_debug_output) >= UNIFI_DEBUG_GBUFFER_SIZE) | |
94 | { | |
95 | unifi_dbgbuf_ptr = unifi_debug_output; | |
96 | } | |
97 | } /* append_char() */ | |
98 | ||
99 | ||
c781b96b | 100 | void unifi_debug_string_to_buf(const char *str) |
635d2b00 | 101 | { |
c781b96b | 102 | const char *p = str; |
635d2b00 GKH |
103 | while (*p) |
104 | { | |
105 | append_char(*p); | |
106 | p++; | |
107 | } | |
108 | /* Update start-of-buffer pointer */ | |
109 | unifi_dbgbuf_start = unifi_dbgbuf_ptr + 1; | |
110 | if ((unifi_dbgbuf_start - unifi_debug_output) >= UNIFI_DEBUG_GBUFFER_SIZE) | |
111 | { | |
112 | unifi_dbgbuf_start = unifi_debug_output; | |
113 | } | |
114 | } | |
115 | ||
116 | ||
c781b96b | 117 | void unifi_debug_log_to_buf(const char *fmt, ...) |
635d2b00 GKH |
118 | { |
119 | #define DEBUG_BUFFER_SIZE 80 | |
c781b96b | 120 | static char s[DEBUG_BUFFER_SIZE]; |
635d2b00 GKH |
121 | va_list args; |
122 | ||
123 | va_start(args, fmt); | |
e4bcecd9 | 124 | vsnprintf(s, DEBUG_BUFFER_SIZE, fmt, args); |
635d2b00 GKH |
125 | va_end(args); |
126 | ||
127 | unifi_debug_string_to_buf(s); | |
128 | } /* unifi_debug_log_to_buf() */ | |
129 | ||
130 | ||
ed51b4d8 GKH |
131 | /* Convert signed 32 bit (or less) integer to string */ |
132 | static void CsrUInt16ToHex(u16 number, char *str) | |
133 | { | |
134 | u16 index; | |
135 | u16 currentValue; | |
136 | ||
137 | for (index = 0; index < 4; index++) | |
138 | { | |
139 | currentValue = (u16) (number & 0x000F); | |
140 | number >>= 4; | |
141 | str[3 - index] = (char) (currentValue > 9 ? currentValue + 55 : currentValue + '0'); | |
142 | } | |
143 | str[4] = '\0'; | |
144 | } | |
145 | ||
146 | ||
635d2b00 GKH |
147 | /* |
148 | * --------------------------------------------------------------------------- | |
149 | * unifi_debug_hex_to_buf | |
150 | * | |
151 | * puts the contents of the passed buffer into the debug buffer as a hex string | |
152 | * | |
153 | * Arguments: | |
154 | * buff buffer to print as hex | |
155 | * length number of chars to print | |
156 | * | |
157 | * Returns: | |
158 | * None. | |
159 | * | |
160 | * --------------------------------------------------------------------------- | |
161 | */ | |
c781b96b | 162 | void unifi_debug_hex_to_buf(const char *buff, u16 length) |
635d2b00 | 163 | { |
c781b96b | 164 | char s[5]; |
8c87f69a | 165 | u16 i; |
635d2b00 | 166 | |
95edd09e | 167 | for (i = 0; i < length; i = i + 2) |
635d2b00 | 168 | { |
8c87f69a | 169 | CsrUInt16ToHex(*((u16 *)(buff + i)), s); |
635d2b00 GKH |
170 | unifi_debug_string_to_buf(s); |
171 | } | |
172 | } | |
173 | ||
174 | ||
175 | void unifi_debug_buf_dump(void) | |
176 | { | |
95e326c2 | 177 | s32 offset = unifi_dbgbuf_ptr - unifi_debug_output; |
635d2b00 GKH |
178 | |
179 | unifi_error(NULL, "HIP debug buffer offset=%d\n", offset); | |
180 | dump_str(unifi_debug_output + offset, UNIFI_DEBUG_GBUFFER_SIZE - offset); | |
181 | dump_str(unifi_debug_output, offset); | |
182 | } /* unifi_debug_buf_dump() */ | |
183 | ||
184 | ||
185 | #endif /* CSR_WIFI_HIP_DEBUG_OFFLINE */ | |
186 | ||
187 | #ifdef CSR_PRE_ALLOC_NET_DATA | |
188 | #define NETDATA_PRE_ALLOC_BUF_SIZE 8000 | |
189 | ||
190 | void prealloc_netdata_free(card_t *card) | |
191 | { | |
192 | unifi_warning(card->ospriv, "prealloc_netdata_free: IN: w=%d r=%d\n", card->prealloc_netdata_w, card->prealloc_netdata_r); | |
193 | ||
194 | while (card->bulk_data_desc_list[card->prealloc_netdata_r].data_length != 0) | |
195 | { | |
196 | unifi_warning(card->ospriv, "prealloc_netdata_free: r=%d\n", card->prealloc_netdata_r); | |
197 | ||
198 | unifi_net_data_free(card->ospriv, &card->bulk_data_desc_list[card->prealloc_netdata_r]); | |
199 | card->prealloc_netdata_r++; | |
200 | card->prealloc_netdata_r %= BULK_DATA_PRE_ALLOC_NUM; | |
201 | } | |
202 | card->prealloc_netdata_r = card->prealloc_netdata_w = 0; | |
203 | ||
204 | unifi_warning(card->ospriv, "prealloc_netdata_free: OUT: w=%d r=%d\n", card->prealloc_netdata_w, card->prealloc_netdata_r); | |
205 | } | |
206 | ||
207 | ||
208 | CsrResult prealloc_netdata_alloc(card_t *card) | |
209 | { | |
210 | CsrResult r; | |
211 | ||
212 | unifi_trace(card->ospriv, UDBG5, "prealloc_netdata_alloc: IN: w=%d r=%d\n", card->prealloc_netdata_w, card->prealloc_netdata_r); | |
213 | ||
214 | while (card->bulk_data_desc_list[card->prealloc_netdata_w].data_length == 0) | |
215 | { | |
216 | r = unifi_net_data_malloc(card->ospriv, &card->bulk_data_desc_list[card->prealloc_netdata_w], NETDATA_PRE_ALLOC_BUF_SIZE); | |
217 | if (r != CSR_RESULT_SUCCESS) | |
218 | { | |
219 | unifi_error(card->ospriv, "prealloc_netdata_alloc: Failed to allocate t-h bulk data\n"); | |
220 | return CSR_RESULT_FAILURE; | |
221 | } | |
222 | card->prealloc_netdata_w++; | |
223 | card->prealloc_netdata_w %= BULK_DATA_PRE_ALLOC_NUM; | |
224 | } | |
225 | unifi_trace(card->ospriv, UDBG5, "prealloc_netdata_alloc: OUT: w=%d r=%d\n", card->prealloc_netdata_w, card->prealloc_netdata_r); | |
226 | ||
227 | return CSR_RESULT_SUCCESS; | |
228 | } | |
229 | ||
230 | ||
26a6b2e1 | 231 | static CsrResult prealloc_netdata_get(card_t *card, bulk_data_desc_t *bulk_data_slot, u32 size) |
635d2b00 GKH |
232 | { |
233 | CsrResult r; | |
234 | ||
235 | unifi_trace(card->ospriv, UDBG5, "prealloc_netdata_get: IN: w=%d r=%d\n", card->prealloc_netdata_w, card->prealloc_netdata_r); | |
236 | ||
237 | if (card->bulk_data_desc_list[card->prealloc_netdata_r].data_length == 0) | |
238 | { | |
239 | unifi_error(card->ospriv, "prealloc_netdata_get: data_length = 0\n"); | |
240 | } | |
241 | ||
242 | if ((size > NETDATA_PRE_ALLOC_BUF_SIZE) || (card->bulk_data_desc_list[card->prealloc_netdata_r].data_length == 0)) | |
243 | { | |
244 | unifi_warning(card->ospriv, "prealloc_netdata_get: Calling net_data_malloc\n"); | |
245 | ||
246 | r = unifi_net_data_malloc(card->ospriv, bulk_data_slot, size); | |
247 | if (r != CSR_RESULT_SUCCESS) | |
248 | { | |
249 | unifi_error(card->ospriv, "prealloc_netdata_get: Failed to allocate t-h bulk data\n"); | |
250 | return CSR_RESULT_FAILURE; | |
251 | } | |
252 | return CSR_RESULT_SUCCESS; | |
253 | } | |
254 | ||
255 | *bulk_data_slot = card->bulk_data_desc_list[card->prealloc_netdata_r]; | |
256 | card->bulk_data_desc_list[card->prealloc_netdata_r].os_data_ptr = NULL; | |
257 | card->bulk_data_desc_list[card->prealloc_netdata_r].os_net_buf_ptr = NULL; | |
258 | card->bulk_data_desc_list[card->prealloc_netdata_r].net_buf_length = 0; | |
259 | card->bulk_data_desc_list[card->prealloc_netdata_r].data_length = 0; | |
260 | ||
261 | card->prealloc_netdata_r++; | |
262 | card->prealloc_netdata_r %= BULK_DATA_PRE_ALLOC_NUM; | |
263 | ||
264 | unifi_trace(card->ospriv, UDBG5, "prealloc_netdata_get: OUT: w=%d r=%d\n", card->prealloc_netdata_w, card->prealloc_netdata_r); | |
265 | ||
266 | return CSR_RESULT_SUCCESS; | |
267 | } | |
268 | ||
269 | ||
270 | #endif | |
271 | ||
272 | /* | |
273 | * --------------------------------------------------------------------------- | |
274 | * unifi_sdio_interrupt_handler | |
275 | * | |
276 | * This function should be called by the OS-dependent code to handle | |
277 | * an SDIO interrupt from the UniFi. | |
278 | * | |
279 | * Arguments: | |
280 | * card Pointer to card context structure. | |
281 | * | |
282 | * Returns: | |
283 | * None. | |
284 | * | |
285 | * Notes: This function may be called in DRS context. In this case, | |
286 | * tracing with the unifi_trace(), etc, is not allowed. | |
287 | * --------------------------------------------------------------------------- | |
288 | */ | |
289 | void unifi_sdio_interrupt_handler(card_t *card) | |
290 | { | |
291 | /* | |
292 | * Set the flag to say reason for waking was SDIO interrupt. | |
293 | * Then ask the OS layer to run the unifi_bh to give attention to the UniFi. | |
294 | */ | |
295 | card->bh_reason_unifi = 1; | |
95edd09e | 296 | (void)unifi_run_bh(card->ospriv); |
635d2b00 GKH |
297 | } /* sdio_interrupt_handler() */ |
298 | ||
299 | ||
300 | /* | |
301 | * --------------------------------------------------------------------------- | |
302 | * unifi_configure_low_power_mode | |
303 | * | |
304 | * This function should be called by the OS-dependent when | |
305 | * the deep sleep signaling needs to be enabled or disabled. | |
306 | * | |
307 | * Arguments: | |
308 | * card Pointer to card context structure. | |
309 | * low_power_mode Disable/Enable the deep sleep signaling | |
310 | * periodic_wake_mode UniFi wakes host periodically. | |
311 | * | |
312 | * Returns: | |
313 | * CSR_RESULT_SUCCESS on success or a CSR error code. | |
314 | * --------------------------------------------------------------------------- | |
315 | */ | |
316 | CsrResult unifi_configure_low_power_mode(card_t *card, | |
317 | enum unifi_low_power_mode low_power_mode, | |
318 | enum unifi_periodic_wake_mode periodic_wake_mode) | |
319 | { | |
320 | card->low_power_mode = low_power_mode; | |
321 | card->periodic_wake_mode = periodic_wake_mode; | |
322 | ||
323 | unifi_trace(card->ospriv, UDBG1, | |
324 | "unifi_configure_low_power_mode: new mode = %s, wake_host = %s\n", | |
325 | (low_power_mode == UNIFI_LOW_POWER_DISABLED)?"disabled" : "enabled", | |
326 | (periodic_wake_mode == UNIFI_PERIODIC_WAKE_HOST_DISABLED)?"FALSE" : "TRUE"); | |
327 | ||
95edd09e | 328 | (void)unifi_run_bh(card->ospriv); |
635d2b00 GKH |
329 | return CSR_RESULT_SUCCESS; |
330 | } /* unifi_configure_low_power_mode() */ | |
331 | ||
332 | ||
333 | /* | |
334 | * --------------------------------------------------------------------------- | |
335 | * unifi_force_low_power_mode | |
336 | * | |
337 | * This function should be called by the OS-dependent when | |
338 | * UniFi needs to be set to the low power mode (e.g. on suspend) | |
339 | * | |
340 | * Arguments: | |
341 | * card Pointer to card context structure. | |
342 | * | |
343 | * Returns: | |
344 | * CSR_RESULT_SUCCESS on success or a CSR error code. | |
345 | * --------------------------------------------------------------------------- | |
346 | */ | |
347 | CsrResult unifi_force_low_power_mode(card_t *card) | |
348 | { | |
349 | if (card->low_power_mode == UNIFI_LOW_POWER_DISABLED) | |
350 | { | |
351 | unifi_error(card->ospriv, "Attempt to set mode to TORPID when lower power mode is disabled\n"); | |
352 | return CSR_WIFI_HIP_RESULT_INVALID_VALUE; | |
353 | } | |
354 | ||
355 | return unifi_set_host_state(card, UNIFI_HOST_STATE_TORPID); | |
356 | } /* unifi_force_low_power_mode() */ | |
357 | ||
358 | ||
359 | /* | |
360 | * --------------------------------------------------------------------------- | |
361 | * unifi_bh | |
362 | * | |
363 | * This function should be called by the OS-dependent code when | |
364 | * host and/or UniFi has requested an exchange of messages. | |
365 | * | |
366 | * Arguments: | |
367 | * card Pointer to card context structure. | |
368 | * | |
369 | * Returns: | |
370 | * CSR_RESULT_SUCCESS on success or a CSR error code. | |
371 | * --------------------------------------------------------------------------- | |
372 | */ | |
26a6b2e1 | 373 | CsrResult unifi_bh(card_t *card, u32 *remaining) |
635d2b00 GKH |
374 | { |
375 | CsrResult r; | |
376 | CsrResult csrResult; | |
5379b13d | 377 | u8 pending; |
95e326c2 | 378 | s32 iostate, j; |
635d2b00 | 379 | const enum unifi_low_power_mode low_power_mode = card->low_power_mode; |
8c87f69a | 380 | u16 data_slots_used = 0; |
635d2b00 GKH |
381 | |
382 | ||
383 | /* Process request to raise the maximum SDIO clock */ | |
384 | r = process_clock_request(card); | |
385 | if (r != CSR_RESULT_SUCCESS) | |
386 | { | |
387 | unifi_error(card->ospriv, "Error setting maximum SDIO clock\n"); | |
388 | goto exit; | |
389 | } | |
390 | ||
391 | /* | |
392 | * Why was the BH thread woken? | |
393 | * If it was an SDIO interrupt, UniFi is awake and we need to process it. | |
394 | * If it was a host process queueing data, then we need to awaken UniFi. | |
395 | * | |
396 | * Priority of flags is top down. | |
397 | * | |
398 | * ----------------------------------------------------------+ | |
399 | * \state| AWAKE | DROWSY | TORPID | | |
400 | * flag\ | | | | | |
401 | * ---------+--------------+----------------+----------------| | |
402 | * | do the host | go to AWAKE and| go to AWAKE and| | |
403 | * unifi | protocol | do the host | do the host | | |
404 | * | | protocol | protocol | | |
405 | * ---------+--------------+----------------+----------------| | |
406 | * | do the host | | | | |
407 | * host | protocol | do nothing | go to DROWSY | | |
408 | * | | | | | |
409 | * ---------+--------------+----------------+----------------| | |
410 | * | | | should not | | |
411 | * timeout | go to TORPID | error, unifi | occur | | |
412 | * | | didn't wake up | do nothing | | |
413 | * ----------------------------------------------------------+ | |
414 | * | |
415 | * Note that if we end up in the AWAKE state we always do the host protocol. | |
416 | */ | |
417 | ||
418 | do | |
419 | { | |
420 | /* | |
421 | * When the host state is set to DROWSY, then we can not disable the | |
422 | * interrupts as UniFi can generate an interrupt even when the INT_ENABLE | |
423 | * register has the interrupts disabled. This interrupt will be lost. | |
424 | */ | |
425 | if (card->host_state == UNIFI_HOST_STATE_DROWSY || card->host_state == UNIFI_HOST_STATE_TORPID) | |
426 | { | |
7e6f5794 | 427 | u8 reason_unifi; |
635d2b00 GKH |
428 | |
429 | /* | |
430 | * An interrupt may occur while or after we cache the reason. | |
431 | * This interrupt will cause the unifi_bh() to be scheduled again. | |
432 | * Any interrupt that has happened before the register is read | |
433 | * and is considered spurious has to acknowledged. | |
434 | */ | |
435 | reason_unifi = card->bh_reason_unifi; | |
436 | ||
437 | /* | |
438 | * If an interrupt is received, check if it was a real one, | |
439 | * set the host state to AWAKE and run the BH. | |
440 | */ | |
441 | r = CardPendingInt(card, &pending); | |
442 | if (r != CSR_RESULT_SUCCESS) | |
443 | { | |
444 | goto exit; | |
445 | } | |
446 | ||
447 | if (pending) | |
448 | { | |
449 | unifi_trace(card->ospriv, UDBG5, | |
450 | "UNIFI_HOST_STATE_%s: Set state to AWAKE.\n", | |
451 | (card->host_state == UNIFI_HOST_STATE_TORPID)?"TORPID" : "DROWSY"); | |
452 | ||
453 | r = unifi_set_host_state(card, UNIFI_HOST_STATE_AWAKE); | |
454 | if (r == CSR_RESULT_SUCCESS) | |
455 | { | |
456 | (*remaining) = 0; | |
457 | break; | |
458 | } | |
459 | } | |
460 | else if (reason_unifi) | |
461 | { | |
462 | CsrSdioInterruptAcknowledge(card->sdio_if); | |
463 | } | |
464 | ||
465 | /* | |
466 | * If an chip is in TORPID, and the host wants to wake it up, | |
467 | * set the host state to DROWSY and wait for the wake-up interrupt. | |
468 | */ | |
469 | if ((card->host_state == UNIFI_HOST_STATE_TORPID) && card->bh_reason_host) | |
470 | { | |
471 | r = unifi_set_host_state(card, UNIFI_HOST_STATE_DROWSY); | |
472 | if (r == CSR_RESULT_SUCCESS) | |
473 | { | |
474 | /* | |
475 | * set the timeout value to UNIFI_DEFAULT_WAKE_TIMEOUT | |
476 | * to capture a wake error. | |
477 | */ | |
478 | card->bh_reason_host = 0; | |
479 | (*remaining) = UNIFI_DEFAULT_WAKE_TIMEOUT; | |
480 | return CSR_RESULT_SUCCESS; | |
481 | } | |
482 | ||
483 | goto exit; | |
484 | } | |
485 | ||
486 | /* | |
487 | * If the chip is in DROWSY, and the timeout expires, | |
488 | * we need to reset the chip. This should never occur. | |
489 | * (If it does, check that the calling thread set "remaining" | |
490 | * according to the time remaining when unifi_bh() was called). | |
491 | */ | |
492 | if ((card->host_state == UNIFI_HOST_STATE_DROWSY) && ((*remaining) == 0)) | |
493 | { | |
494 | unifi_error(card->ospriv, "UniFi did not wake up on time...\n"); | |
495 | ||
496 | /* | |
497 | * Check if Function1 has gone away or | |
498 | * if we missed an SDIO interrupt. | |
499 | */ | |
500 | r = unifi_check_io_status(card, &iostate); | |
501 | if (r == CSR_WIFI_HIP_RESULT_NO_DEVICE) | |
502 | { | |
503 | goto exit; | |
504 | } | |
505 | /* Need to reset and reboot */ | |
506 | return CSR_RESULT_FAILURE; | |
507 | } | |
508 | } | |
509 | else | |
510 | { | |
511 | if (card->bh_reason_unifi || card->bh_reason_host) | |
512 | { | |
513 | break; | |
514 | } | |
515 | ||
516 | if (((*remaining) == 0) && (low_power_mode == UNIFI_LOW_POWER_ENABLED)) | |
517 | { | |
518 | r = unifi_set_host_state(card, UNIFI_HOST_STATE_TORPID); | |
519 | if (r == CSR_RESULT_SUCCESS) | |
520 | { | |
521 | (*remaining) = 0; | |
522 | return CSR_RESULT_SUCCESS; | |
523 | } | |
524 | ||
525 | goto exit; | |
526 | } | |
527 | } | |
528 | ||
529 | /* No need to run the host protocol */ | |
530 | return CSR_RESULT_SUCCESS; | |
531 | } while (0); | |
532 | ||
533 | ||
534 | /* Disable the SDIO interrupts while doing SDIO ops */ | |
535 | csrResult = CsrSdioInterruptDisable(card->sdio_if); | |
536 | if (csrResult == CSR_SDIO_RESULT_NO_DEVICE) | |
537 | { | |
538 | r = CSR_WIFI_HIP_RESULT_NO_DEVICE; | |
539 | goto exit; | |
540 | } | |
541 | if (csrResult != CSR_RESULT_SUCCESS) | |
542 | { | |
543 | r = ConvertCsrSdioToCsrHipResult(card, csrResult); | |
544 | unifi_error(card->ospriv, "Failed to disable SDIO interrupts. unifi_bh queues error.\n"); | |
545 | goto exit; | |
546 | } | |
547 | ||
548 | /* Now that the interrupts are disabled, ack the interrupt */ | |
549 | CsrSdioInterruptAcknowledge(card->sdio_if); | |
550 | ||
551 | /* Run the HIP */ | |
552 | r = process_bh(card); | |
553 | if (r != CSR_RESULT_SUCCESS) | |
554 | { | |
555 | goto exit; | |
556 | } | |
557 | ||
558 | /* | |
559 | * If host is now idle, schedule a timer for the delay before we | |
560 | * let UniFi go into deep sleep. | |
561 | * If the timer goes off, we will move to TORPID state. | |
562 | * If UniFi raises an interrupt in the meantime, we will cancel | |
563 | * the timer and start a new one when we become idle. | |
564 | */ | |
565 | for (j = 0; j < UNIFI_NO_OF_TX_QS; j++) | |
566 | { | |
567 | data_slots_used += CSR_WIFI_HIP_Q_SLOTS_USED(&card->fh_traffic_queue[j]); | |
568 | } | |
569 | ||
570 | if ((low_power_mode == UNIFI_LOW_POWER_ENABLED) && (data_slots_used == 0)) | |
571 | { | |
572 | #ifndef CSR_WIFI_HIP_TA_DISABLE | |
573 | if (card->ta_sampling.traffic_type != CSR_WIFI_ROUTER_CTRL_TRAFFIC_TYPE_PERIODIC) | |
574 | { | |
575 | #endif | |
576 | /* return the UNIFI_DEFAULT_HOST_IDLE_TIMEOUT, so we can go to sleep. */ | |
577 | unifi_trace(card->ospriv, UDBG5, | |
578 | "Traffic is not periodic, set timer for TORPID.\n"); | |
579 | (*remaining) = UNIFI_DEFAULT_HOST_IDLE_TIMEOUT; | |
580 | #ifndef CSR_WIFI_HIP_TA_DISABLE | |
581 | } | |
582 | else | |
583 | { | |
584 | unifi_trace(card->ospriv, UDBG5, | |
585 | "Traffic is periodic, set unifi to TORPID immediately.\n"); | |
586 | if (CardAreAllFromHostDataSlotsEmpty(card) == 1) | |
587 | { | |
588 | r = unifi_set_host_state(card, UNIFI_HOST_STATE_TORPID); | |
589 | if (r != CSR_RESULT_SUCCESS) | |
590 | { | |
591 | goto exit; | |
592 | } | |
593 | } | |
594 | } | |
595 | #endif | |
596 | } | |
597 | ||
598 | csrResult = CsrSdioInterruptEnable(card->sdio_if); | |
599 | if (csrResult == CSR_SDIO_RESULT_NO_DEVICE) | |
600 | { | |
601 | r = CSR_WIFI_HIP_RESULT_NO_DEVICE; | |
602 | } | |
603 | if (csrResult != CSR_RESULT_SUCCESS) | |
604 | { | |
605 | r = ConvertCsrSdioToCsrHipResult(card, csrResult); | |
606 | unifi_error(card->ospriv, "Failed to enable SDIO interrupt\n"); | |
607 | } | |
608 | ||
609 | exit: | |
610 | ||
611 | unifi_trace(card->ospriv, UDBG4, "New state=%d\n", card->host_state); | |
612 | ||
613 | if (r != CSR_RESULT_SUCCESS) | |
614 | { | |
615 | #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_SDIO_TRACE) | |
616 | unifi_debug_buf_dump(); | |
617 | #endif | |
618 | /* If an interrupt has been raised, ack it here */ | |
619 | if (card->bh_reason_unifi) | |
620 | { | |
621 | CsrSdioInterruptAcknowledge(card->sdio_if); | |
622 | } | |
623 | ||
624 | unifi_error(card->ospriv, | |
625 | "unifi_bh: state=%d %c, clock=%dkHz, interrupt=%d host=%d, power_save=%s\n", | |
626 | card->host_state, | |
627 | (card->host_state == UNIFI_HOST_STATE_AWAKE)?'A' : (card->host_state == UNIFI_HOST_STATE_DROWSY)?'D' : 'T', | |
628 | card->sdio_clock_speed / 1000, | |
629 | card->bh_reason_unifi, card->bh_reason_host, | |
630 | (low_power_mode == UNIFI_LOW_POWER_DISABLED)?"disabled" : "enabled"); | |
631 | ||
632 | /* Try to capture firmware panic codes */ | |
95edd09e | 633 | (void)unifi_capture_panic(card); |
635d2b00 GKH |
634 | |
635 | /* Ask for a mini-coredump when the driver has reset UniFi */ | |
95edd09e | 636 | (void)unifi_coredump_request_at_next_reset(card, 1); |
635d2b00 GKH |
637 | } |
638 | ||
639 | return r; | |
640 | } /* unifi_bh() */ | |
641 | ||
642 | ||
643 | /* | |
644 | * --------------------------------------------------------------------------- | |
645 | * process_clock_request | |
646 | * | |
647 | * Handle request from the OS layer to increase the SDIO clock speed. | |
648 | * The fast clock is limited until the firmware has indicated that it has | |
649 | * completed initialisation to the OS layer. | |
650 | * | |
651 | * Arguments: | |
652 | * card Pointer to card context structure. | |
653 | * | |
654 | * Returns: | |
655 | * CSR_RESULT_SUCCESS on success or CSR error code. | |
656 | * --------------------------------------------------------------------------- | |
657 | */ | |
658 | static CsrResult process_clock_request(card_t *card) | |
659 | { | |
660 | CsrResult r = CSR_RESULT_SUCCESS; | |
661 | CsrResult csrResult; | |
662 | ||
663 | if (!card->request_max_clock) | |
664 | { | |
665 | return CSR_RESULT_SUCCESS; /* No pending request */ | |
666 | } | |
667 | ||
668 | /* | |
669 | * The SDIO clock speed request from the OS layer is only acted upon if | |
670 | * the UniFi is awake. If it was in any other state, the clock speed will | |
671 | * transition through SAFE to MAX while the host wakes it up, and the | |
672 | * final speed reached will be UNIFI_SDIO_CLOCK_MAX_HZ. | |
673 | * This assumes that the SME never requests low power mode while the f/w | |
674 | * initialisation takes place. | |
675 | */ | |
676 | if (card->host_state == UNIFI_HOST_STATE_AWAKE) | |
677 | { | |
678 | unifi_trace(card->ospriv, UDBG1, "Set SDIO max clock\n"); | |
679 | csrResult = CsrSdioMaxBusClockFrequencySet(card->sdio_if, UNIFI_SDIO_CLOCK_MAX_HZ); | |
680 | if (csrResult != CSR_RESULT_SUCCESS) | |
681 | { | |
682 | r = ConvertCsrSdioToCsrHipResult(card, csrResult); | |
683 | } | |
684 | else | |
685 | { | |
686 | card->sdio_clock_speed = UNIFI_SDIO_CLOCK_MAX_HZ; /* log the new freq */ | |
687 | } | |
688 | } | |
689 | else | |
690 | { | |
691 | unifi_trace(card->ospriv, UDBG1, "Will set SDIO max clock after wakeup\n"); | |
692 | } | |
693 | ||
694 | /* Cancel the request now that it has been acted upon, or is about to be | |
695 | * by the wakeup mechanism | |
696 | */ | |
697 | card->request_max_clock = 0; | |
698 | ||
699 | return r; | |
700 | } | |
701 | ||
702 | ||
703 | /* | |
704 | * --------------------------------------------------------------------------- | |
705 | * process_bh | |
706 | * | |
707 | * Exchange messages with UniFi | |
708 | * | |
709 | * Arguments: | |
710 | * card Pointer to card context structure. | |
711 | * | |
712 | * Returns: | |
713 | * CSR_RESULT_SUCCESS on success or CSR error code. | |
714 | * --------------------------------------------------------------------------- | |
715 | */ | |
716 | static CsrResult process_bh(card_t *card) | |
717 | { | |
718 | CsrResult r; | |
5379b13d | 719 | u8 more; |
635d2b00 GKH |
720 | more = FALSE; |
721 | ||
722 | /* Process the reasons (interrupt, signals) */ | |
723 | do | |
724 | { | |
725 | /* | |
726 | * Run in a while loop, to save clearing the interrupts | |
727 | * every time around the outside loop. | |
728 | */ | |
729 | do | |
730 | { | |
731 | /* If configured to run the HIP just once, skip first loop */ | |
732 | if (card->intmode & CSR_WIFI_INTMODE_RUN_BH_ONCE) | |
733 | { | |
734 | break; | |
735 | } | |
736 | ||
737 | r = handle_host_protocol(card, &more); | |
738 | if (r != CSR_RESULT_SUCCESS) | |
739 | { | |
740 | return r; | |
741 | } | |
742 | ||
743 | #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) | |
744 | unifi_debug_log_to_buf("c52=%d c53=%d tx=%d txc=%d rx=%d s=%d t=%d fc=%d\n", | |
745 | card->cmd_prof.cmd52_count, | |
746 | card->cmd_prof.cmd53_count, | |
747 | card->cmd_prof.tx_count, | |
748 | card->cmd_prof.tx_cfm_count, | |
749 | card->cmd_prof.rx_count, | |
750 | card->cmd_prof.sdio_cmd_signal, | |
751 | card->cmd_prof.sdio_cmd_to_host, | |
752 | card->cmd_prof.sdio_cmd_from_host_and_clear | |
753 | ); | |
754 | ||
755 | card->cmd_prof.cmd52_count = card->cmd_prof.cmd53_count = 0; | |
756 | card->cmd_prof.tx_count = card->cmd_prof.tx_cfm_count = card->cmd_prof.rx_count = 0; | |
757 | ||
758 | card->cmd_prof.cmd52_f0_r_count = 0; | |
759 | card->cmd_prof.cmd52_f0_w_count = 0; | |
760 | card->cmd_prof.cmd52_r8or16_count = 0; | |
761 | card->cmd_prof.cmd52_w8or16_count = 0; | |
762 | card->cmd_prof.cmd52_r16_count = 0; | |
763 | card->cmd_prof.cmd52_w16_count = 0; | |
764 | card->cmd_prof.cmd52_r32_count = 0; | |
765 | ||
766 | card->cmd_prof.sdio_cmd_signal = 0; | |
767 | card->cmd_prof.sdio_cmd_clear_slot = 0; | |
768 | card->cmd_prof.sdio_cmd_to_host = 0; | |
769 | card->cmd_prof.sdio_cmd_from_host = 0; | |
770 | card->cmd_prof.sdio_cmd_from_host_and_clear = 0; | |
771 | #endif | |
772 | ||
773 | ||
774 | } while (more || card->bh_reason_unifi || card->bh_reason_host); | |
775 | ||
776 | /* Acknowledge the h/w interrupt */ | |
777 | r = CardClearInt(card); | |
778 | if (r != CSR_RESULT_SUCCESS) | |
779 | { | |
780 | unifi_error(card->ospriv, "Failed to acknowledge interrupt.\n"); | |
781 | return r; | |
782 | } | |
783 | ||
784 | /* | |
785 | * UniFi may have tried to generate an interrupt during the | |
786 | * CardClearInt() was running. So, we need to run the host | |
787 | * protocol again, to check if there are any pending requests. | |
788 | */ | |
789 | r = handle_host_protocol(card, &more); | |
790 | if (r != CSR_RESULT_SUCCESS) | |
791 | { | |
792 | return r; | |
793 | } | |
794 | ||
795 | #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) | |
796 | unifi_debug_log_to_buf("c52=%d c53=%d tx=%d txc=%d rx=%d s=%d t=%d fc=%d\n", | |
797 | card->cmd_prof.cmd52_count, | |
798 | card->cmd_prof.cmd53_count, | |
799 | card->cmd_prof.tx_count, | |
800 | card->cmd_prof.tx_cfm_count, | |
801 | card->cmd_prof.rx_count, | |
802 | card->cmd_prof.sdio_cmd_signal, | |
803 | card->cmd_prof.sdio_cmd_to_host, | |
804 | card->cmd_prof.sdio_cmd_from_host_and_clear | |
805 | ); | |
806 | ||
807 | card->cmd_prof.cmd52_count = card->cmd_prof.cmd53_count = 0; | |
808 | card->cmd_prof.tx_count = card->cmd_prof.tx_cfm_count = card->cmd_prof.rx_count = 0; | |
809 | ||
810 | card->cmd_prof.cmd52_f0_r_count = 0; | |
811 | card->cmd_prof.cmd52_f0_w_count = 0; | |
812 | card->cmd_prof.cmd52_r8or16_count = 0; | |
813 | card->cmd_prof.cmd52_w8or16_count = 0; | |
814 | card->cmd_prof.cmd52_r16_count = 0; | |
815 | card->cmd_prof.cmd52_w16_count = 0; | |
816 | card->cmd_prof.cmd52_r32_count = 0; | |
817 | ||
818 | card->cmd_prof.sdio_cmd_signal = 0; | |
819 | card->cmd_prof.sdio_cmd_clear_slot = 0; | |
820 | card->cmd_prof.sdio_cmd_to_host = 0; | |
821 | card->cmd_prof.sdio_cmd_from_host = 0; | |
822 | card->cmd_prof.sdio_cmd_from_host_and_clear = 0; | |
823 | #endif | |
824 | /* If configured to run the HIP just once, work is now done */ | |
825 | if (card->intmode & CSR_WIFI_INTMODE_RUN_BH_ONCE) | |
826 | { | |
827 | break; | |
828 | } | |
829 | ||
830 | } while (more || card->bh_reason_unifi || card->bh_reason_host); | |
831 | ||
832 | #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) | |
833 | if ((card->intmode & CSR_WIFI_INTMODE_RUN_BH_ONCE) == 0) | |
834 | { | |
835 | unifi_debug_log_to_buf("proc=%d\n", | |
836 | card->cmd_prof.process_count); | |
837 | } | |
838 | #endif | |
839 | ||
840 | return CSR_RESULT_SUCCESS; | |
841 | } /* process_bh() */ | |
842 | ||
843 | ||
844 | /* | |
845 | * --------------------------------------------------------------------------- | |
846 | * handle_host_protocol | |
847 | * | |
848 | * This function implements the Host Interface Protocol (HIP) as | |
849 | * described in the Host Interface Protocol Specification. | |
850 | * | |
851 | * Arguments: | |
852 | * card Pointer to card context structure. | |
853 | * processed_something Pointer to location to update processing status: | |
854 | * TRUE when data was transferred | |
855 | * FALSE when no data was transferred (queues empty) | |
856 | * | |
857 | * Returns: | |
858 | * CSR_RESULT_SUCCESS on success or CSR error code. | |
859 | * --------------------------------------------------------------------------- | |
860 | */ | |
5379b13d | 861 | static CsrResult handle_host_protocol(card_t *card, u8 *processed_something) |
635d2b00 GKH |
862 | { |
863 | CsrResult r; | |
95e326c2 | 864 | s32 done; |
635d2b00 GKH |
865 | |
866 | *processed_something = FALSE; | |
867 | ||
868 | #ifdef CSR_WIFI_HIP_NOISY | |
869 | unifi_error(card->ospriv, " ======================== \n"); | |
870 | #endif /* CSR_WIFI_HIP_NOISY */ | |
871 | ||
872 | #ifdef CSR_WIFI_HIP_DATA_PLANE_PROFILE | |
873 | card->cmd_prof.process_count++; | |
874 | #endif | |
875 | ||
876 | card->bh_reason_unifi = card->bh_reason_host = 0; | |
877 | card->generate_interrupt = 0; | |
878 | ||
879 | ||
880 | /* | |
881 | * (Re)fill the T-H signal buffer | |
882 | */ | |
883 | r = read_to_host_signals(card, &done); | |
884 | if (r != CSR_RESULT_SUCCESS) | |
885 | { | |
10f035a0 | 886 | unifi_error(card->ospriv, "Error occurred reading to-host signals\n"); |
635d2b00 GKH |
887 | return r; |
888 | } | |
889 | if (done > 0) | |
890 | { | |
891 | *processed_something = TRUE; | |
892 | } | |
893 | ||
894 | /* | |
895 | * Process any to-host signals. | |
896 | * Perform any requested CMD53 transfers here, but just queue any | |
897 | * bulk data command responses. | |
898 | */ | |
899 | r = process_to_host_signals(card, &done); | |
900 | if (r != CSR_RESULT_SUCCESS) | |
901 | { | |
10f035a0 | 902 | unifi_error(card->ospriv, "Error occurred processing to-host signals\n"); |
635d2b00 GKH |
903 | return r; |
904 | } | |
905 | ||
906 | /* Now send any signals in the F-H queues */ | |
907 | /* Give precedence to the command queue */ | |
908 | r = process_fh_cmd_queue(card, &done); | |
909 | if (r != CSR_RESULT_SUCCESS) | |
910 | { | |
10f035a0 | 911 | unifi_error(card->ospriv, "Error occurred processing from-host signals\n"); |
635d2b00 GKH |
912 | return r; |
913 | } | |
914 | if (done > 0) | |
915 | { | |
916 | *processed_something = TRUE; | |
917 | } | |
918 | ||
919 | r = process_fh_traffic_queue(card, &done); | |
920 | if (r != CSR_RESULT_SUCCESS) | |
921 | { | |
10f035a0 | 922 | unifi_error(card->ospriv, "Error occurred processing from-host data signals\n"); |
635d2b00 GKH |
923 | return r; |
924 | } | |
925 | if (done > 0) | |
926 | { | |
927 | *processed_something = TRUE; | |
928 | } | |
929 | ||
930 | /* Flush out the batch of signals to the UniFi. */ | |
931 | r = flush_fh_buffer(card); | |
932 | if (r != CSR_RESULT_SUCCESS) | |
933 | { | |
934 | unifi_error(card->ospriv, "Failed to copy from-host signals to UniFi\n"); | |
935 | return r; | |
936 | } | |
937 | ||
938 | ||
939 | /* | |
940 | * Send the host interrupt to say the queues have been modified. | |
941 | */ | |
942 | if (card->generate_interrupt) | |
943 | { | |
944 | r = CardGenInt(card); | |
945 | if (r != CSR_RESULT_SUCCESS) | |
946 | { | |
947 | unifi_error(card->ospriv, "Failed to notify UniFi that queues have been modified.\n"); | |
948 | return r; | |
949 | } | |
950 | } | |
95edd09e GKH |
951 | |
952 | #ifdef CSR_WIFI_RX_PATH_SPLIT | |
635d2b00 GKH |
953 | #ifdef CSR_WIFI_RX_PATH_SPLIT_DONT_USE_WQ |
954 | unifi_rx_queue_flush(card->ospriv); | |
955 | #endif | |
95edd09e GKH |
956 | #endif |
957 | ||
635d2b00 GKH |
958 | /* See if we can re-enable transmission now */ |
959 | restart_packet_flow(card); | |
960 | ||
961 | #ifdef CSR_PRE_ALLOC_NET_DATA | |
962 | r = prealloc_netdata_alloc(card); | |
963 | if (r != CSR_RESULT_SUCCESS) | |
964 | { | |
965 | unifi_error(card->ospriv, "prealloc_netdata failed\n"); | |
966 | return r; | |
967 | } | |
968 | #endif | |
969 | ||
970 | /* | |
971 | * Don't put the thread sleep if we just interacted with the chip, | |
972 | * there might be more to do if we look again. | |
973 | */ | |
974 | return r; | |
975 | } /* handle_host_protocol() */ | |
976 | ||
977 | ||
978 | /* | |
979 | * Rounds the given signal length in bytes to a whole number | |
980 | * of sig_frag_size. | |
981 | */ | |
982 | #define GET_CHUNKS_FOR(SIG_FRAG_SIZE, LENGTH) (((LENGTH) + ((SIG_FRAG_SIZE)-1)) / (SIG_FRAG_SIZE)) | |
983 | ||
984 | ||
985 | /* | |
986 | * --------------------------------------------------------------------------- | |
987 | * read_to_host_signals | |
988 | * | |
989 | * Read everything pending in the UniFi TH signal buffer. | |
990 | * Only do it if the local buffer is empty. | |
991 | * | |
992 | * Arguments: | |
993 | * card Pointer to card context struct | |
994 | * processed Number of signals read: | |
995 | * 0 if there were no signals pending, | |
996 | * 1 if we read at least one signal | |
997 | * Returns: | |
998 | * CSR error code if an error occurred. | |
999 | * --------------------------------------------------------------------------- | |
1000 | */ | |
95e326c2 | 1001 | static CsrResult read_to_host_signals(card_t *card, s32 *processed) |
635d2b00 | 1002 | { |
95e326c2 GKH |
1003 | s32 count_thw, count_thr; |
1004 | s32 unread_chunks, unread_bytes; | |
635d2b00 GKH |
1005 | CsrResult r; |
1006 | ||
1007 | *processed = 0; | |
1008 | ||
1009 | /* Read any pending signals or bulk data commands */ | |
1010 | count_thw = unifi_read_shared_count(card, card->sdio_ctrl_addr + 4); | |
1011 | if (count_thw < 0) | |
1012 | { | |
1013 | unifi_error(card->ospriv, "Failed to read to-host sig written count\n"); | |
1014 | return CSR_RESULT_FAILURE; | |
1015 | } | |
1016 | card->to_host_signals_w = count_thw; /* diag */ | |
1017 | ||
1018 | count_thr = card->to_host_signals_r; | |
1019 | ||
1020 | if (count_thw == count_thr) | |
1021 | { | |
1022 | return CSR_RESULT_SUCCESS; | |
1023 | } | |
1024 | ||
1025 | unread_chunks = | |
1026 | (((count_thw - count_thr) + 128) % 128) - card->th_buffer.count; | |
1027 | ||
1028 | if (unread_chunks == 0) | |
1029 | { | |
1030 | return CSR_RESULT_SUCCESS; | |
1031 | } | |
1032 | ||
1033 | unread_bytes = card->config_data.sig_frag_size * unread_chunks; | |
1034 | ||
1035 | ||
1036 | r = unifi_bulk_rw(card, | |
1037 | card->config_data.tohost_sigbuf_handle, | |
1038 | card->th_buffer.ptr, | |
1039 | unread_bytes, | |
1040 | UNIFI_SDIO_READ); | |
1041 | if (r != CSR_RESULT_SUCCESS) | |
1042 | { | |
1043 | unifi_error(card->ospriv, "Failed to read ToHost signal\n"); | |
1044 | return r; | |
1045 | } | |
1046 | ||
1047 | card->th_buffer.ptr += unread_bytes; | |
8c87f69a | 1048 | card->th_buffer.count += (u16)unread_chunks; |
635d2b00 GKH |
1049 | |
1050 | *processed = 1; | |
1051 | ||
1052 | return CSR_RESULT_SUCCESS; | |
1053 | } /* read_to_host_signals() */ | |
1054 | ||
1055 | ||
1056 | /* | |
1057 | * --------------------------------------------------------------------------- | |
1058 | * update_to_host_signals_r | |
1059 | * | |
1060 | * Advance the shared-memory count of chunks read from the to-host | |
1061 | * signal buffer. | |
1062 | * Raise a UniFi internal interrupt to tell the firmware that the | |
1063 | * count has changed. | |
1064 | * | |
1065 | * Arguments: | |
1066 | * card Pointer to card context struct | |
1067 | * pending Number of chunks remaining | |
1068 | * | |
1069 | * Returns: | |
1070 | * CSR_RESULT_SUCCESS on success or CSR error code | |
1071 | * --------------------------------------------------------------------------- | |
1072 | */ | |
ab2b8c73 | 1073 | static CsrResult update_to_host_signals_r(card_t *card, s16 pending) |
635d2b00 GKH |
1074 | { |
1075 | CsrResult r; | |
1076 | ||
1077 | card->to_host_signals_r = | |
1078 | (card->to_host_signals_r + (card->th_buffer.count - pending)) % 128; | |
1079 | card->th_buffer.count = pending; | |
1080 | ||
1081 | /* Update the count of signals read */ | |
1082 | r = unifi_write_8_or_16(card, card->sdio_ctrl_addr + 6, | |
7e6f5794 | 1083 | (u8)card->to_host_signals_r); |
635d2b00 GKH |
1084 | if (r != CSR_RESULT_SUCCESS) |
1085 | { | |
1086 | unifi_error(card->ospriv, "Failed to update to-host signals read\n"); | |
1087 | return r; | |
1088 | } | |
1089 | ||
1090 | r = CardGenInt(card); | |
1091 | if (r != CSR_RESULT_SUCCESS) | |
1092 | { | |
1093 | unifi_error(card->ospriv, "Failed to notify UniFi that we processed to-host signals.\n"); | |
1094 | return r; | |
1095 | } | |
1096 | ||
1097 | card->generate_interrupt = 0; | |
1098 | ||
1099 | return CSR_RESULT_SUCCESS; | |
1100 | } /* update_to_host_signals_r() */ | |
1101 | ||
1102 | ||
1103 | /* | |
1104 | * --------------------------------------------------------------------------- | |
1105 | * read_unpack_cmd | |
1106 | * | |
1107 | * Converts a wire-formatted command to the host bulk_data_cmd_t structure. | |
1108 | * | |
1109 | * Arguments: | |
1110 | * ptr Pointer to the command | |
1111 | * bulk_data_cmd Pointer to the host structure | |
1112 | * | |
1113 | * Returns: | |
1114 | * None. | |
1115 | * --------------------------------------------------------------------------- | |
1116 | */ | |
7e6f5794 | 1117 | static void read_unpack_cmd(const u8 *ptr, bulk_data_cmd_t *bulk_data_cmd) |
635d2b00 | 1118 | { |
ab2b8c73 | 1119 | s16 index = 0; |
635d2b00 GKH |
1120 | bulk_data_cmd->cmd_and_len = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(ptr + index); |
1121 | index += SIZEOF_UINT16; | |
1122 | bulk_data_cmd->data_slot = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(ptr + index); | |
1123 | index += SIZEOF_UINT16; | |
1124 | bulk_data_cmd->offset = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(ptr + index); | |
1125 | index += SIZEOF_UINT16; | |
1126 | bulk_data_cmd->buffer_handle = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(ptr + index); | |
1127 | index += SIZEOF_UINT16; | |
1128 | } /* read_unpack_cmd */ | |
1129 | ||
1130 | ||
1131 | /* | |
1132 | * --------------------------------------------------------------------------- | |
1133 | * process_to_host_signals | |
1134 | * | |
1135 | * Read and dispatch signals from the UniFi | |
1136 | * | |
1137 | * Arguments: | |
1138 | * card Pointer to card context struct | |
1139 | * processed Pointer to location to write processing result: | |
1140 | * 0 if there were no signals pending, | |
1141 | * 1 if we read at least one signal | |
1142 | * | |
1143 | * Returns: | |
1144 | * CSR error code if there was an error | |
1145 | * | |
1146 | * Notes: | |
1147 | * Since bulk data transfers can take a long time, if we wait until | |
1148 | * all are done before we acknowledge the signals, the UniFi runs out | |
1149 | * of buffer space. Therefore we keep a count of the bytes transferred | |
1150 | * in bulk data commands, and update the to-host-signals-read count | |
1151 | * if we've done a large transfer. | |
1152 | * | |
1153 | * All data in the f/w is stored in a little endian format, without any | |
1154 | * padding bytes. Every read from the memory has to be transformed in | |
1155 | * host (cpu specific) format, before we can process it. Therefore we | |
1156 | * use read_unpack_cmd() and read_unpack_signal() to convert the raw data | |
1157 | * contained in the card->th_buffer.buf to host structures. | |
1158 | * Important: UDI clients use wire-formatted structures, so we need to | |
1159 | * indicate all data, as we have read it from the device. | |
1160 | * --------------------------------------------------------------------------- | |
1161 | */ | |
95e326c2 | 1162 | static CsrResult process_to_host_signals(card_t *card, s32 *processed) |
635d2b00 | 1163 | { |
ab2b8c73 GKH |
1164 | s16 pending; |
1165 | s16 remaining; | |
7e6f5794 | 1166 | u8 *bufptr; |
635d2b00 | 1167 | bulk_data_param_t data_ptrs; |
ab2b8c73 | 1168 | s16 cmd; |
8c87f69a | 1169 | u16 sig_len; |
ab2b8c73 | 1170 | s16 i; |
8c87f69a GKH |
1171 | u16 chunks_in_buf; |
1172 | u16 bytes_transferred = 0; | |
635d2b00 GKH |
1173 | CsrResult r = CSR_RESULT_SUCCESS; |
1174 | ||
1175 | *processed = 0; | |
1176 | ||
1177 | pending = card->th_buffer.count; | |
1178 | ||
1179 | /* Are there new to-host signals? */ | |
1180 | unifi_trace(card->ospriv, UDBG4, "handling %d to-host chunks\n", pending); | |
1181 | ||
1182 | if (!pending) | |
1183 | { | |
1184 | return CSR_RESULT_SUCCESS; | |
1185 | } | |
1186 | ||
1187 | /* | |
1188 | * This is a pointer to the raw data we have read from the f/w. | |
1189 | * Can be a signal or a command. Note that we need to convert | |
1190 | * it to a host structure before we process it. | |
1191 | */ | |
1192 | bufptr = card->th_buffer.buf; | |
1193 | ||
1194 | while (pending > 0) | |
1195 | { | |
ab2b8c73 | 1196 | s16 f_flush_count = 0; |
635d2b00 GKH |
1197 | |
1198 | /* | |
1199 | * Command and length are common to signal and bulk data msgs. | |
1200 | * If command == 0 (i.e. a signal), len is number of bytes | |
1201 | * *following* the 2-byte header. | |
1202 | */ | |
1203 | cmd = bufptr[1] >> 4; | |
1204 | sig_len = bufptr[0] + ((bufptr[1] & 0x0F) << 8); | |
1205 | ||
1206 | #ifdef CSR_WIFI_HIP_NOISY | |
1207 | unifi_error(card->ospriv, "Received UniFi msg cmd=%d, len=%d\n", | |
1208 | cmd, sig_len); | |
1209 | #endif /* CSR_WIFI_HIP_NOISY */ | |
1210 | ||
1211 | if ((sig_len == 0) && | |
1212 | ((cmd != SDIO_CMD_CLEAR_SLOT) && (cmd != SDIO_CMD_PADDING))) | |
1213 | { | |
1214 | unifi_error(card->ospriv, "incomplete signal or command: has size zero\n"); | |
1215 | return CSR_RESULT_FAILURE; | |
1216 | } | |
1217 | /* | |
1218 | * Make sure the buffer contains a complete message. | |
1219 | * Signals may occupy multiple chunks, bulk-data commands occupy | |
1220 | * one chunk. | |
1221 | */ | |
1222 | if (cmd == SDIO_CMD_SIGNAL) | |
1223 | { | |
8c87f69a | 1224 | chunks_in_buf = GET_CHUNKS_FOR(card->config_data.sig_frag_size, (u16)(sig_len + 2)); |
635d2b00 GKH |
1225 | } |
1226 | else | |
1227 | { | |
1228 | chunks_in_buf = 1; | |
1229 | } | |
1230 | ||
8c87f69a | 1231 | if (chunks_in_buf > (u16)pending) |
635d2b00 GKH |
1232 | { |
1233 | unifi_error(card->ospriv, "incomplete signal (0x%x?): need %d chunks, got %d\n", | |
1234 | GET_SIGNAL_ID(bufptr + 2), | |
1235 | chunks_in_buf, pending); | |
1236 | unifi_error(card->ospriv, " thsw=%d, thsr=%d\n", | |
1237 | card->to_host_signals_w, | |
1238 | card->to_host_signals_r); | |
1239 | return CSR_RESULT_FAILURE; | |
1240 | } | |
1241 | ||
1242 | ||
1243 | switch (cmd) | |
1244 | { | |
1245 | case SDIO_CMD_SIGNAL: | |
1246 | /* This is a signal. Read the rest of it and then handle it. */ | |
1247 | #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) | |
1248 | card->cmd_prof.sdio_cmd_signal++; | |
1249 | #endif | |
1250 | ||
1251 | for (i = 0; i < UNIFI_MAX_DATA_REFERENCES; i++) | |
1252 | { | |
1253 | /* Retrieve dataRefs[i].DataLength */ | |
8c87f69a | 1254 | u16 data_len = GET_PACKED_DATAREF_LEN(bufptr + 2, i); |
635d2b00 GKH |
1255 | |
1256 | /* | |
1257 | * The bulk data length in the signal can not be greater than | |
1258 | * the maximun length allowed by the SDIO config structure. | |
1259 | */ | |
1260 | if (data_len > card->config_data.data_slot_size) | |
1261 | { | |
1262 | unifi_error(card->ospriv, | |
1263 | "Bulk Data length (%d) exceeds Maximum Bulk Data length (%d)\n", | |
1264 | data_len, card->config_data.data_slot_size); | |
1265 | return CSR_RESULT_FAILURE; | |
1266 | } | |
1267 | ||
1268 | /* | |
1269 | * Len here might not be the same as the length in the | |
1270 | * bulk data slot. The slot length will always be even, | |
1271 | * but len could be odd. | |
1272 | */ | |
1273 | if (data_len != 0) | |
1274 | { | |
1275 | /* Retrieve dataRefs[i].SlotNumber */ | |
ab2b8c73 | 1276 | s16 slot = GET_PACKED_DATAREF_SLOT(bufptr + 2, i); |
635d2b00 GKH |
1277 | |
1278 | if (slot >= card->config_data.num_tohost_data_slots) | |
1279 | { | |
1280 | unifi_error(card->ospriv, "!!!bad slot number in to-host signal: %d, sig 0x%X\n", | |
1281 | slot, cmd); | |
1282 | return CSR_RESULT_FAILURE; | |
1283 | } | |
1284 | ||
1285 | data_ptrs.d[i].os_data_ptr = card->to_host_data[slot].os_data_ptr; | |
1286 | data_ptrs.d[i].os_net_buf_ptr = card->to_host_data[slot].os_net_buf_ptr; | |
1287 | data_ptrs.d[i].net_buf_length = card->to_host_data[slot].net_buf_length; | |
1288 | data_ptrs.d[i].data_length = data_len; | |
1289 | } | |
1290 | else | |
1291 | { | |
1292 | UNIFI_INIT_BULK_DATA(&data_ptrs.d[i]); | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | /* | |
1297 | * Log the signal to the UDI, before call unifi_receive_event() as | |
1298 | * it can modify the bulk data. | |
1299 | */ | |
1300 | if (card->udi_hook) | |
1301 | { | |
1302 | (*card->udi_hook)(card->ospriv, bufptr + 2, sig_len, | |
1303 | &data_ptrs, UDI_LOG_TO_HOST); | |
1304 | } | |
1305 | ||
1306 | #ifdef CSR_WIFI_HIP_DATA_PLANE_PROFILE | |
1307 | if (GET_SIGNAL_ID(bufptr + 2) == CSR_MA_PACKET_CONFIRM_ID) | |
1308 | { | |
1309 | card->cmd_prof.tx_cfm_count++; | |
1310 | } | |
1311 | else if (GET_SIGNAL_ID(bufptr + 2) == CSR_MA_PACKET_INDICATION_ID) | |
1312 | { | |
1313 | if (data_ptrs.d[0].os_data_ptr) | |
1314 | { | |
1315 | if ((*data_ptrs.d[0].os_data_ptr) & 0x08) | |
1316 | { | |
1317 | card->cmd_prof.rx_count++; | |
1318 | } | |
1319 | } | |
1320 | } | |
1321 | #endif | |
1322 | /* | |
1323 | * Check if the signal is MA-PACKET.cfm and if so check the status. | |
1324 | * If the status is failure, search through the slot records to find | |
1325 | * if any slots are occupied for this host tag. This can happen if | |
1326 | * f/w has not downloaded the bulkdata and before that itself it has | |
1327 | * signalled the confirm with failure. If it finds a slot with that | |
1328 | * host tag then, it clears the corresponding slot | |
1329 | */ | |
1330 | ||
1331 | if (GET_SIGNAL_ID(bufptr + 2) == CSR_MA_PACKET_CONFIRM_ID) | |
1332 | { | |
1333 | /* Get host tag and transmission status */ | |
26a6b2e1 | 1334 | u32 host_tag = GET_PACKED_MA_PACKET_CONFIRM_HOST_TAG(bufptr + 2); |
8c87f69a | 1335 | u16 status = GET_PACKED_MA_PACKET_CONFIRM_TRANSMISSION_STATUS(bufptr + 2); |
635d2b00 GKH |
1336 | |
1337 | unifi_trace(card->ospriv, UDBG4, "process_to_host_signals signal ID=%x host Tag=%x status=%x\n", | |
1338 | GET_SIGNAL_ID(bufptr + 2), host_tag, status); | |
1339 | ||
1340 | /* If transmission status is failure then search through the slot records | |
1341 | * and if for any slot records the clear slot is not done then do it now | |
1342 | */ | |
1343 | ||
1344 | if (status && (card->fh_slot_host_tag_record)) | |
1345 | { | |
8c87f69a | 1346 | u16 num_fh_slots = card->config_data.num_fromhost_data_slots; |
635d2b00 GKH |
1347 | |
1348 | /* search through the list of slot records and match with host tag | |
1349 | * If a slot is not yet cleared then clear the slot from here | |
1350 | */ | |
1351 | for (i = 0; i < num_fh_slots; i++) | |
1352 | { | |
1353 | if (card->fh_slot_host_tag_record[i] == host_tag) | |
1354 | { | |
95edd09e GKH |
1355 | #ifdef CSR_WIFI_REQUEUE_PACKET_TO_HAL |
1356 | /* Invoke the HAL module function to requeue it back to HAL Queues */ | |
1357 | r = unifi_reque_ma_packet_request(card->ospriv, host_tag, status, &card->from_host_data[i].bd); | |
1358 | card->fh_slot_host_tag_record[i] = CSR_WIFI_HIP_RESERVED_HOST_TAG; | |
1359 | if (CSR_RESULT_SUCCESS != r) | |
1360 | { | |
1361 | unifi_trace(card->ospriv, UDBG5, "process_to_host_signals: Failed to requeue Packet(hTag:%x) back to HAL \n", host_tag); | |
1362 | CardClearFromHostDataSlot(card, i); | |
1363 | } | |
1364 | else | |
1365 | { | |
1366 | CardClearFromHostDataSlotWithoutFreeingBulkData(card, i); | |
1367 | } | |
1368 | ||
1369 | #else | |
635d2b00 GKH |
1370 | unifi_trace(card->ospriv, UDBG4, "process_to_host_signals Clear slot=%x host tag=%x\n", i, host_tag); |
1371 | card->fh_slot_host_tag_record[i] = CSR_WIFI_HIP_RESERVED_HOST_TAG; | |
1372 | ||
1373 | /* Set length field in from_host_data array to 0 */ | |
1374 | CardClearFromHostDataSlot(card, i); | |
95edd09e | 1375 | #endif |
635d2b00 GKH |
1376 | break; |
1377 | } | |
1378 | } | |
1379 | } | |
1380 | } | |
1381 | ||
1382 | /* Pass event to OS layer */ | |
1383 | unifi_receive_event(card->ospriv, bufptr + 2, sig_len, &data_ptrs); | |
1384 | ||
1385 | /* Initialise the to_host data, so it can be re-used. */ | |
1386 | for (i = 0; i < UNIFI_MAX_DATA_REFERENCES; i++) | |
1387 | { | |
1388 | /* The slot is only valid if the length is non-zero. */ | |
1389 | if (GET_PACKED_DATAREF_LEN(bufptr + 2, i) != 0) | |
1390 | { | |
ab2b8c73 | 1391 | s16 slot = GET_PACKED_DATAREF_SLOT(bufptr + 2, i); |
635d2b00 GKH |
1392 | if (slot < card->config_data.num_tohost_data_slots) |
1393 | { | |
1394 | UNIFI_INIT_BULK_DATA(&card->to_host_data[slot]); | |
1395 | } | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | #ifndef CSR_WIFI_DEFER_TH_FLUSH | |
1400 | /* | |
1401 | * If we have previously transferred a lot of data, ack | |
1402 | * the signals read so far, so f/w can reclaim the buffer | |
1403 | * memory sooner. | |
1404 | */ | |
1405 | if (bytes_transferred >= TO_HOST_FLUSH_THRESHOLD) | |
1406 | { | |
1407 | f_flush_count = 1; | |
1408 | } | |
1409 | #endif | |
1410 | break; | |
1411 | ||
1412 | ||
1413 | case SDIO_CMD_CLEAR_SLOT: | |
1414 | #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) | |
1415 | card->cmd_prof.sdio_cmd_clear_slot++; | |
1416 | #endif | |
1417 | /* This is a clear slot command. */ | |
1418 | if (sig_len != 0) | |
1419 | { | |
1420 | unifi_error(card->ospriv, "process_to_host_signals: clear slot, bad data len: 0x%X at offset %d\n", | |
1421 | sig_len, bufptr - card->th_buffer.buf); | |
1422 | return CSR_RESULT_FAILURE; | |
1423 | } | |
1424 | ||
1425 | r = process_clear_slot_command(card, bufptr); | |
1426 | if (r != CSR_RESULT_SUCCESS) | |
1427 | { | |
1428 | unifi_error(card->ospriv, "Failed to process clear slot\n"); | |
1429 | return r; | |
1430 | } | |
1431 | break; | |
1432 | ||
1433 | case SDIO_CMD_TO_HOST_TRANSFER: | |
1434 | case SDIO_CMD_FROM_HOST_TRANSFER: | |
1435 | case SDIO_CMD_FROM_HOST_AND_CLEAR: | |
1436 | case SDIO_CMD_OVERLAY_TRANSFER: | |
1437 | /* This is a bulk data command. */ | |
1438 | if (sig_len & 1) | |
1439 | { | |
1440 | unifi_error(card->ospriv, "process_to_host_signals: bulk data, bad data len: 0x%X at offset %d\n", | |
1441 | sig_len, bufptr - card->th_buffer.buf); | |
1442 | return CSR_RESULT_FAILURE; | |
1443 | } | |
1444 | ||
1445 | r = process_bulk_data_command(card, bufptr, cmd, sig_len); | |
1446 | if (r != CSR_RESULT_SUCCESS) | |
1447 | { | |
1448 | unifi_error(card->ospriv, "Failed to process bulk cmd\n"); | |
1449 | return r; | |
1450 | } | |
1451 | /* Count the bytes transferred */ | |
1452 | bytes_transferred += sig_len; | |
1453 | ||
1454 | if (cmd == SDIO_CMD_FROM_HOST_AND_CLEAR) | |
1455 | { | |
1456 | #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) | |
1457 | card->cmd_prof.sdio_cmd_from_host_and_clear++; | |
1458 | #endif | |
1459 | #ifndef CSR_WIFI_DEFER_TH_FLUSH | |
1460 | f_flush_count = 1; | |
1461 | #endif | |
1462 | } | |
1463 | #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) | |
1464 | else if (cmd == SDIO_CMD_FROM_HOST_TRANSFER) | |
1465 | { | |
1466 | card->cmd_prof.sdio_cmd_from_host++; | |
1467 | } | |
1468 | else if (cmd == SDIO_CMD_TO_HOST_TRANSFER) | |
1469 | { | |
1470 | card->cmd_prof.sdio_cmd_to_host++; | |
1471 | } | |
1472 | #endif | |
1473 | break; | |
1474 | ||
1475 | case SDIO_CMD_PADDING: | |
1476 | break; | |
1477 | ||
1478 | default: | |
1479 | unifi_error(card->ospriv, "Unrecognised to-host command: %d\n", cmd); | |
1480 | break; | |
1481 | } | |
1482 | ||
1483 | bufptr += chunks_in_buf * card->config_data.sig_frag_size; | |
1484 | pending -= chunks_in_buf; | |
1485 | ||
1486 | /* | |
1487 | * Write out the host signal count when a significant | |
1488 | * number of bytes of bulk data have been transferred or | |
1489 | * when we have performed a CopyFromHostAndClear. | |
1490 | */ | |
1491 | if (f_flush_count) | |
1492 | { | |
1493 | r = update_to_host_signals_r(card, pending); | |
1494 | if (r != CSR_RESULT_SUCCESS) | |
1495 | { | |
1496 | return r; | |
1497 | } | |
1498 | bytes_transferred = 0; | |
1499 | } | |
1500 | } | |
1501 | ||
1502 | if (pending) | |
1503 | { | |
1504 | unifi_warning(card->ospriv, "proc_th_sigs: %d unprocessed\n", pending); | |
1505 | } | |
1506 | ||
1507 | /* If we processed any signals, write the updated count to UniFi */ | |
1508 | if (card->th_buffer.count != pending) | |
1509 | { | |
1510 | r = update_to_host_signals_r(card, pending); | |
1511 | if (r != CSR_RESULT_SUCCESS) | |
1512 | { | |
1513 | return r; | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | /* | |
1518 | * Reset the buffer pointer, copying down any un-processed signals. | |
1519 | * This can happen if we enable the optimisation in read_to_host_signals() | |
1520 | * that limits the length to whole blocks. | |
1521 | */ | |
1522 | remaining = card->th_buffer.ptr - bufptr; | |
1523 | if (remaining < 0) | |
1524 | { | |
1525 | unifi_error(card->ospriv, "Processing TH signals overran the buffer\n"); | |
1526 | return CSR_RESULT_FAILURE; | |
1527 | } | |
1528 | if (remaining > 0) | |
1529 | { | |
1530 | /* Use a safe copy because source and destination may overlap */ | |
7e6f5794 GKH |
1531 | u8 *d = card->th_buffer.buf; |
1532 | u8 *s = bufptr; | |
95e326c2 | 1533 | s32 n = remaining; |
635d2b00 GKH |
1534 | while (n--) |
1535 | { | |
1536 | *d++ = *s++; | |
1537 | } | |
1538 | } | |
1539 | card->th_buffer.ptr = card->th_buffer.buf + remaining; | |
1540 | ||
1541 | ||
1542 | /* If we reach here then we processed something */ | |
1543 | *processed = 1; | |
1544 | return CSR_RESULT_SUCCESS; | |
1545 | } /* process_to_host_signals() */ | |
1546 | ||
1547 | ||
1548 | /* | |
1549 | * --------------------------------------------------------------------------- | |
1550 | * process_clear_slot_command | |
1551 | * | |
1552 | * Process a clear slot command fom the UniFi. | |
1553 | * | |
1554 | * Arguments: | |
1555 | * card Pointer to card context struct | |
1556 | * bdcmd Pointer to bulk-data command msg from UniFi | |
1557 | * | |
1558 | * Returns: | |
1559 | * 0 on success, CSR error code on error | |
1560 | * --------------------------------------------------------------------------- | |
1561 | */ | |
7e6f5794 | 1562 | static CsrResult process_clear_slot_command(card_t *card, const u8 *cmdptr) |
635d2b00 | 1563 | { |
8c87f69a | 1564 | u16 data_slot; |
ab2b8c73 | 1565 | s16 slot; |
635d2b00 GKH |
1566 | |
1567 | data_slot = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(cmdptr + SIZEOF_UINT16); | |
1568 | ||
1569 | unifi_trace(card->ospriv, UDBG4, "Processing clear slot cmd, slot=0x%X\n", | |
1570 | data_slot); | |
1571 | ||
1572 | slot = data_slot & 0x7FFF; | |
1573 | ||
1574 | #ifdef CSR_WIFI_HIP_NOISY | |
1575 | unifi_error(card->ospriv, "CMD clear data slot 0x%04x\n", data_slot); | |
1576 | #endif /* CSR_WIFI_HIP_NOISY */ | |
1577 | ||
1578 | if (data_slot & SLOT_DIR_TO_HOST) | |
1579 | { | |
1580 | if (slot >= card->config_data.num_tohost_data_slots) | |
1581 | { | |
1582 | unifi_error(card->ospriv, | |
1583 | "Invalid to-host data slot in SDIO_CMD_CLEAR_SLOT: %d\n", | |
1584 | slot); | |
1585 | return CSR_RESULT_FAILURE; | |
1586 | } | |
1587 | /* clear to-host data slot */ | |
1588 | unifi_warning(card->ospriv, "Unexpected clear to-host data slot cmd: 0x%04x\n", | |
1589 | data_slot); | |
1590 | } | |
1591 | else | |
1592 | { | |
1593 | if (slot >= card->config_data.num_fromhost_data_slots) | |
1594 | { | |
1595 | unifi_error(card->ospriv, | |
1596 | "Invalid from-host data slot in SDIO_CMD_CLEAR_SLOT: %d\n", | |
1597 | slot); | |
1598 | return CSR_RESULT_FAILURE; | |
1599 | } | |
1600 | ||
1601 | /* | |
1602 | * The driver is the owner to clear all slots now | |
1603 | * Ref - comment in process_fh_traffic_queue | |
1604 | * so it will just ignore the clear slot command from firmware | |
1605 | * and return success | |
1606 | */ | |
1607 | return CSR_RESULT_SUCCESS; | |
1608 | ||
1609 | /* Set length field in from_host_data array to 0 */ | |
1610 | /* CardClearFromHostDataSlot(card, slot); */ | |
1611 | } | |
1612 | ||
1613 | return CSR_RESULT_SUCCESS; | |
1614 | } /* process_clear_slot_command() */ | |
1615 | ||
1616 | ||
1617 | /* | |
1618 | * --------------------------------------------------------------------------- | |
1619 | * process_bulk_data_command | |
1620 | * | |
1621 | * Process a bulk data request from the UniFi. | |
1622 | * | |
1623 | * Arguments: | |
1624 | * card Pointer to card context struct | |
1625 | * bdcmd Pointer to bulk-data command msg from UniFi | |
1626 | * cmd, len Decoded values of command and length from the msg header | |
1627 | * Cmd will only be one of: | |
1628 | * SDIO_CMD_TO_HOST_TRANSFER | |
1629 | * SDIO_CMD_FROM_HOST_TRANSFER | |
1630 | * SDIO_CMD_FROM_HOST_AND_CLEAR | |
1631 | * SDIO_CMD_OVERLAY_TRANSFER | |
1632 | * | |
1633 | * Returns: | |
1634 | * CSR_RESULT_SUCCESS on success, CSR error code on error | |
1635 | * --------------------------------------------------------------------------- | |
1636 | */ | |
7e6f5794 | 1637 | static CsrResult process_bulk_data_command(card_t *card, const u8 *cmdptr, |
ab2b8c73 | 1638 | s16 cmd, u16 len) |
635d2b00 GKH |
1639 | { |
1640 | bulk_data_desc_t *bdslot; | |
1641 | #ifdef CSR_WIFI_ALIGNMENT_WORKAROUND | |
7e6f5794 | 1642 | u8 *host_bulk_data_slot; |
635d2b00 GKH |
1643 | #endif |
1644 | bulk_data_cmd_t bdcmd; | |
ab2b8c73 GKH |
1645 | s16 offset; |
1646 | s16 slot; | |
1647 | s16 dir; | |
635d2b00 GKH |
1648 | CsrResult r; |
1649 | ||
1650 | read_unpack_cmd(cmdptr, &bdcmd); | |
1651 | ||
1652 | unifi_trace(card->ospriv, UDBG4, "Processing bulk data cmd %d %s, len=%d, slot=0x%X\n", | |
1653 | cmd, lookup_bulkcmd_name(cmd), len, bdcmd.data_slot); | |
1654 | ||
1655 | /* | |
1656 | * Round up the transfer length if required. | |
1657 | * This is useful to force all transfers to be a multiple of the SDIO block | |
1658 | * size, so the SDIO driver won't try to use a byte-mode CMD53. These are | |
1659 | * broken on some hardware platforms. | |
1660 | */ | |
1661 | if (card->sdio_io_block_pad) | |
1662 | { | |
1663 | len = (len + card->sdio_io_block_size - 1) & ~(card->sdio_io_block_size - 1); | |
1664 | unifi_trace(card->ospriv, UDBG4, "Rounded bulk data length up to %d\n", len); | |
1665 | } | |
1666 | ||
1667 | slot = bdcmd.data_slot & 0x7FFF; | |
1668 | ||
1669 | if (cmd == SDIO_CMD_OVERLAY_TRANSFER) | |
1670 | { | |
1671 | return CSR_WIFI_HIP_RESULT_INVALID_VALUE; /* Not used on CSR6xxx */ | |
1672 | } | |
1673 | else | |
1674 | { | |
1675 | if (bdcmd.data_slot & SLOT_DIR_TO_HOST) | |
1676 | { | |
1677 | /* Request is for to-host bulk data */ | |
1678 | ||
1679 | /* Check sanity of slot number */ | |
1680 | if (slot >= card->config_data.num_tohost_data_slots) | |
1681 | { | |
1682 | unifi_error(card->ospriv, | |
1683 | "Invalid to-host data slot in SDIO bulk xfr req: %d\n", | |
1684 | slot); | |
1685 | return CSR_RESULT_FAILURE; | |
1686 | } | |
1687 | ||
1688 | /* Allocate memory for card->to_host_data[slot] bulk data here. */ | |
1689 | #ifdef CSR_PRE_ALLOC_NET_DATA | |
1690 | r = prealloc_netdata_get(card, &card->to_host_data[slot], len); | |
1691 | #else | |
1692 | r = unifi_net_data_malloc(card->ospriv, &card->to_host_data[slot], len); | |
1693 | #endif | |
1694 | if (r != CSR_RESULT_SUCCESS) | |
1695 | { | |
1696 | unifi_error(card->ospriv, "Failed to allocate t-h bulk data\n"); | |
1697 | return CSR_RESULT_FAILURE; | |
1698 | } | |
1699 | ||
1700 | bdslot = &card->to_host_data[slot]; | |
1701 | ||
1702 | /* Make sure that the buffer is 4-bytes aligned */ | |
1703 | r = unifi_net_dma_align(card->ospriv, bdslot); | |
1704 | if (r != CSR_RESULT_SUCCESS) | |
1705 | { | |
1706 | unifi_error(card->ospriv, "Failed to align t-h bulk data buffer for DMA\n"); | |
1707 | return CSR_RESULT_FAILURE; | |
1708 | } | |
1709 | } | |
1710 | else | |
1711 | { | |
1712 | /* Request is for from-host bulk data */ | |
1713 | ||
1714 | if (slot >= card->config_data.num_fromhost_data_slots) | |
1715 | { | |
1716 | unifi_error(card->ospriv, | |
1717 | "Invalid from-host data slot in SDIO bulk xfr req: %d\n", | |
1718 | slot); | |
1719 | return CSR_RESULT_FAILURE; | |
1720 | } | |
1721 | bdslot = &card->from_host_data[slot].bd; | |
1722 | } | |
1723 | offset = bdcmd.offset; | |
1724 | } | |
1725 | /* Do the transfer */ | |
1726 | dir = (cmd == SDIO_CMD_TO_HOST_TRANSFER)? | |
1727 | UNIFI_SDIO_READ : UNIFI_SDIO_WRITE; | |
1728 | ||
1729 | unifi_trace(card->ospriv, UDBG4, | |
1730 | "Bulk %c %s len=%d, handle %d - slot=%d %p+(%d)\n", | |
1731 | (dir == UNIFI_SDIO_READ)?'R' : 'W', | |
1732 | lookup_bulkcmd_name(cmd), | |
1733 | len, | |
1734 | bdcmd.buffer_handle, | |
1735 | slot, bdslot->os_data_ptr, offset); | |
1736 | #ifdef CSR_WIFI_HIP_NOISY | |
1737 | unifi_error(card->ospriv, "Bulk %s len=%d, handle %d - slot=%d %p+(%d)\n", | |
1738 | lookup_bulkcmd_name(cmd), | |
1739 | len, | |
1740 | bdcmd.buffer_handle, | |
1741 | slot, bdslot->os_data_ptr, offset); | |
1742 | #endif /* CSR_WIFI_HIP_NOISY */ | |
1743 | ||
1744 | ||
1745 | if (bdslot->os_data_ptr == NULL) | |
1746 | { | |
1747 | unifi_error(card->ospriv, "Null os_data_ptr - Bulk %s handle %d - slot=%d o=(%d)\n", | |
1748 | lookup_bulkcmd_name(cmd), | |
1749 | bdcmd.buffer_handle, | |
1750 | slot, | |
1751 | offset); | |
1752 | return CSR_WIFI_HIP_RESULT_INVALID_VALUE; | |
1753 | } | |
1754 | ||
1755 | #ifdef CSR_WIFI_ALIGNMENT_WORKAROUND | |
1756 | /* if os_data_ptr is not 4-byte aligned, then allocate a new buffer and copy data | |
1757 | to new buffer to ensure the address passed to unifi_bulk_rw is 4-byte aligned */ | |
1758 | ||
3c0b461e | 1759 | if (len != 0 && (dir == UNIFI_SDIO_WRITE) && (((ptrdiff_t)bdslot->os_data_ptr + offset) & 3)) |
635d2b00 | 1760 | { |
4becf12d | 1761 | host_bulk_data_slot = kmalloc(len, GFP_KERNEL); |
635d2b00 GKH |
1762 | |
1763 | if (!host_bulk_data_slot) | |
1764 | { | |
1765 | unifi_error(card->ospriv, " failed to allocate request_data before unifi_bulk_rw\n"); | |
1766 | return -1; | |
1767 | } | |
1768 | ||
25aebdb1 | 1769 | memcpy((void *)host_bulk_data_slot, |
635d2b00 GKH |
1770 | (void *)(bdslot->os_data_ptr + offset), len); |
1771 | ||
1772 | r = unifi_bulk_rw(card, | |
1773 | bdcmd.buffer_handle, | |
1774 | (void *)host_bulk_data_slot, | |
1775 | len, | |
1776 | dir); | |
1777 | } | |
1778 | else | |
1779 | #endif | |
1780 | { | |
1781 | r = unifi_bulk_rw(card, | |
1782 | bdcmd.buffer_handle, | |
1783 | (void *)(bdslot->os_data_ptr + offset), | |
1784 | len, | |
1785 | dir); | |
1786 | } | |
1787 | ||
1788 | if (r == CSR_WIFI_HIP_RESULT_NO_DEVICE) | |
1789 | { | |
1790 | return r; | |
1791 | } | |
1792 | if (r != CSR_RESULT_SUCCESS) | |
1793 | { | |
1794 | unifi_error(card->ospriv, | |
1795 | "Failed: %s hlen=%d, slen=%d, handle %d - slot=%d %p+0x%X\n", | |
1796 | lookup_bulkcmd_name(cmd), | |
1797 | len, /* Header length */ | |
1798 | bdslot->data_length, /* Length stored in slot */ | |
1799 | bdcmd.buffer_handle, | |
1800 | slot, bdslot->os_data_ptr, offset); | |
1801 | return r; | |
1802 | } | |
1803 | ||
1804 | bdslot->data_length = len; | |
1805 | ||
1806 | if (cmd == SDIO_CMD_FROM_HOST_AND_CLEAR) | |
1807 | { | |
1808 | if (slot >= card->config_data.num_fromhost_data_slots) | |
1809 | { | |
1810 | unifi_error(card->ospriv, | |
1811 | "Invalid from-host data slot in SDIO_CMD_FROM_HOST_AND_CLEAR: %d\n", | |
1812 | slot); | |
1813 | return CSR_RESULT_FAILURE; | |
1814 | } | |
1815 | ||
1816 | #ifdef CSR_WIFI_ALIGNMENT_WORKAROUND | |
1817 | /* moving this check before we clear host data slot */ | |
3c0b461e | 1818 | if ((len != 0) && (dir == UNIFI_SDIO_WRITE) && (((ptrdiff_t)bdslot->os_data_ptr + offset) & 3)) |
635d2b00 | 1819 | { |
4fe9db37 | 1820 | kfree(host_bulk_data_slot); |
635d2b00 GKH |
1821 | } |
1822 | #endif | |
1823 | ||
1824 | if (card->fh_slot_host_tag_record) | |
1825 | { | |
1826 | unifi_trace(card->ospriv, UDBG5, "CopyFromHostAndClearSlot Reset entry for slot=%d\n", slot); | |
1827 | ||
1828 | /* reset the host tag entry for the corresponding slot */ | |
1829 | card->fh_slot_host_tag_record[slot] = CSR_WIFI_HIP_RESERVED_HOST_TAG; | |
1830 | } | |
1831 | ||
1832 | ||
1833 | /* Set length field in from_host_data array to 0 */ | |
1834 | CardClearFromHostDataSlot(card, slot); | |
1835 | } | |
1836 | ||
1837 | return CSR_RESULT_SUCCESS; | |
1838 | } /* process_bulk_data_command() */ | |
1839 | ||
1840 | ||
1841 | /* | |
1842 | * --------------------------------------------------------------------------- | |
1843 | * check_fh_sig_slots | |
1844 | * | |
1845 | * Check whether there are <n> free signal slots available on UniFi. | |
1846 | * This takes into account the signals already batched since the | |
1847 | * from_host_signal counts were last read. | |
1848 | * If the from_host_signal counts indicate not enough space, we read | |
1849 | * the latest count from UniFi to see if some more have been freed. | |
1850 | * | |
1851 | * Arguments: | |
1852 | * None. | |
1853 | * | |
1854 | * Returns: | |
1855 | * CSR_RESULT_SUCCESS, otherwise CSR error code on error. | |
1856 | * --------------------------------------------------------------------------- | |
1857 | */ | |
95e326c2 | 1858 | static CsrResult check_fh_sig_slots(card_t *card, u16 needed, s32 *space_fh) |
635d2b00 | 1859 | { |
26a6b2e1 GKH |
1860 | u32 count_fhw; |
1861 | u32 occupied_fh, slots_fh; | |
95e326c2 | 1862 | s32 count_fhr; |
635d2b00 GKH |
1863 | |
1864 | count_fhw = card->from_host_signals_w; | |
1865 | count_fhr = card->from_host_signals_r; | |
1866 | slots_fh = card->config_data.num_fromhost_sig_frags; | |
1867 | ||
1868 | /* Only read the space in from-host queue if necessary */ | |
1869 | occupied_fh = (count_fhw - count_fhr) % 128; | |
1870 | ||
1871 | if (slots_fh < occupied_fh) | |
1872 | { | |
1873 | *space_fh = 0; | |
1874 | } | |
1875 | else | |
1876 | { | |
1877 | *space_fh = slots_fh - occupied_fh; | |
1878 | } | |
1879 | ||
1880 | if ((occupied_fh != 0) && (*space_fh < needed)) | |
1881 | { | |
1882 | count_fhr = unifi_read_shared_count(card, card->sdio_ctrl_addr + 2); | |
1883 | if (count_fhr < 0) | |
1884 | { | |
1885 | unifi_error(card->ospriv, "Failed to read from-host sig read count\n"); | |
1886 | return CSR_RESULT_FAILURE; | |
1887 | } | |
1888 | card->from_host_signals_r = count_fhr; /* diag */ | |
1889 | ||
1890 | occupied_fh = (count_fhw - count_fhr) % 128; | |
1891 | *space_fh = slots_fh - occupied_fh; | |
1892 | } | |
1893 | ||
1894 | return CSR_RESULT_SUCCESS; | |
1895 | } /* check_fh_sig_slots() */ | |
1896 | ||
1897 | ||
1898 | /* | |
1899 | * If we are padding the From-Host signals to the SDIO block size, | |
1900 | * we need to round up the needed_chunks to the SDIO block size. | |
1901 | */ | |
1902 | #define ROUND_UP_NEEDED_CHUNKS(_card, _needed_chunks) \ | |
1903 | { \ | |
8c87f69a GKH |
1904 | u16 _chunks_per_block; \ |
1905 | u16 _chunks_in_last_block; \ | |
635d2b00 GKH |
1906 | \ |
1907 | if (_card->sdio_io_block_pad) \ | |
1908 | { \ | |
1909 | _chunks_per_block = _card->sdio_io_block_size / _card->config_data.sig_frag_size; \ | |
1910 | _chunks_in_last_block = _needed_chunks % _chunks_per_block; \ | |
1911 | if (_chunks_in_last_block != 0) \ | |
1912 | { \ | |
1913 | _needed_chunks = _needed_chunks + (_chunks_per_block - _chunks_in_last_block); \ | |
1914 | } \ | |
1915 | } \ | |
1916 | } | |
1917 | ||
1918 | ||
1919 | #define ROUND_UP_SPACE_CHUNKS(_card, _space_chunks) \ | |
1920 | { \ | |
8c87f69a | 1921 | u16 _chunks_per_block; \ |
635d2b00 GKH |
1922 | \ |
1923 | if (_card->sdio_io_block_pad) \ | |
1924 | { \ | |
1925 | _chunks_per_block = _card->sdio_io_block_size / _card->config_data.sig_frag_size; \ | |
1926 | _space_chunks = ((_space_chunks / _chunks_per_block) * _chunks_per_block); \ | |
1927 | } \ | |
1928 | } | |
1929 | ||
1930 | ||
1931 | ||
1932 | ||
1933 | ||
1934 | /* | |
1935 | * --------------------------------------------------------------------------- | |
1936 | * process_fh_cmd_queue | |
1937 | * | |
1938 | * Take one signal off the from-host queue and copy it to the UniFi. | |
1939 | * Does nothing if the UniFi has no slots free. | |
1940 | * | |
1941 | * Arguments: | |
1942 | * card Pointer to card context struct | |
1943 | * processed Location to write: | |
1944 | * 0 if there is nothing on the queue to process | |
1945 | * 1 if a signal was successfully processed | |
1946 | * | |
1947 | * Returns: | |
1948 | * CSR error code if an error occurred. | |
1949 | * | |
1950 | * Notes: | |
1951 | * The from-host queue contains signal requests from the network driver | |
1952 | * and any UDI clients interspersed. UDI clients' requests have been stored | |
1953 | * in the from-host queue using the wire-format structures, as they arrive. | |
1954 | * All other requests are stored in the from-host queue using the host | |
1955 | * (cpu specific) structures. We use the is_packed member of the card_signal_t | |
10f035a0 | 1956 | * structure that describes the queue to make the distinction. |
635d2b00 GKH |
1957 | * --------------------------------------------------------------------------- |
1958 | */ | |
95e326c2 | 1959 | static CsrResult process_fh_cmd_queue(card_t *card, s32 *processed) |
635d2b00 GKH |
1960 | { |
1961 | q_t *sigq = &card->fh_command_queue; | |
1962 | ||
1963 | CsrResult r; | |
8c87f69a GKH |
1964 | u16 pending_sigs; |
1965 | u16 pending_chunks; | |
1966 | u16 needed_chunks; | |
95e326c2 | 1967 | s32 space_chunks; |
8c87f69a | 1968 | u16 q_index; |
635d2b00 GKH |
1969 | |
1970 | *processed = 0; | |
1971 | ||
1972 | /* Get the number of pending signals. */ | |
1973 | pending_sigs = CSR_WIFI_HIP_Q_SLOTS_USED(sigq); | |
1974 | unifi_trace(card->ospriv, UDBG5, "proc_fh: %d pending\n", pending_sigs); | |
1975 | if (pending_sigs == 0) | |
1976 | { | |
1977 | /* Nothing to do */ | |
1978 | return CSR_RESULT_SUCCESS; | |
1979 | } | |
1980 | ||
1981 | /* Work out how many chunks we have waiting to send */ | |
1982 | for (pending_chunks = 0, q_index = CSR_WIFI_HIP_Q_NEXT_R_SLOT(sigq); | |
1983 | q_index != CSR_WIFI_HIP_Q_NEXT_W_SLOT(sigq); | |
1984 | q_index = CSR_WIFI_HIP_Q_WRAP(sigq, q_index + 1)) | |
1985 | { | |
1986 | card_signal_t *csptr = CSR_WIFI_HIP_Q_SLOT_DATA(sigq, q_index); | |
1987 | ||
1988 | /* | |
1989 | * Note that GET_CHUNKS_FOR() needs the size of the packed | |
1990 | * (wire-formatted) structure | |
1991 | */ | |
8c87f69a | 1992 | pending_chunks += GET_CHUNKS_FOR(card->config_data.sig_frag_size, (u16)(csptr->signal_length + 2)); |
635d2b00 GKH |
1993 | } |
1994 | ||
1995 | /* | |
1996 | * Check whether UniFi has space for all the buffered bulk-data | |
1997 | * commands and signals as well. | |
1998 | */ | |
1999 | needed_chunks = pending_chunks + card->fh_buffer.count; | |
2000 | ||
2001 | /* Round up to the block size if necessary */ | |
2002 | ROUND_UP_NEEDED_CHUNKS(card, needed_chunks); | |
2003 | ||
2004 | r = check_fh_sig_slots(card, needed_chunks, &space_chunks); | |
2005 | if (r != CSR_RESULT_SUCCESS) | |
2006 | { | |
2007 | /* Error */ | |
2008 | unifi_error(card->ospriv, "Failed to read fh sig count\n"); | |
2009 | return r; | |
2010 | } | |
2011 | ||
2012 | #ifdef CSR_WIFI_HIP_NOISY | |
2013 | unifi_error(card->ospriv, "proc_fh: %d chunks free, need %d\n", | |
2014 | space_chunks, needed_chunks); | |
2015 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2016 | ||
2017 | ||
2018 | /* | |
2019 | * Coalesce as many from-host signals as possible | |
2020 | * into a single block and write using a single CMD53 | |
2021 | */ | |
8c87f69a | 2022 | if (needed_chunks > (u16)space_chunks) |
635d2b00 GKH |
2023 | { |
2024 | /* Round up to the block size if necessary */ | |
2025 | ROUND_UP_SPACE_CHUNKS(card, space_chunks); | |
2026 | ||
2027 | /* | |
2028 | * If the f/w has less free chunks than those already pending | |
2029 | * return immediately. | |
2030 | */ | |
8c87f69a | 2031 | if ((u16)space_chunks <= card->fh_buffer.count) |
635d2b00 GKH |
2032 | { |
2033 | /* | |
2034 | * No room in UniFi for any signals after the buffered bulk | |
2035 | * data commands have been sent. | |
2036 | */ | |
2037 | unifi_error(card->ospriv, "not enough room to send signals, need %d chunks, %d free\n", | |
2038 | card->fh_buffer.count, space_chunks); | |
2039 | card->generate_interrupt = 1; | |
2040 | return CSR_RESULT_SUCCESS; | |
2041 | } | |
8c87f69a | 2042 | pending_chunks = (u16)(space_chunks - card->fh_buffer.count); |
635d2b00 GKH |
2043 | } |
2044 | ||
2045 | while (pending_sigs-- && pending_chunks > 0) | |
2046 | { | |
2047 | card_signal_t *csptr; | |
ab2b8c73 | 2048 | s16 i; |
8c87f69a | 2049 | u16 sig_chunks, total_length, free_chunks_in_fh_buffer; |
635d2b00 | 2050 | bulk_data_param_t bulkdata; |
7e6f5794 | 2051 | u8 *packed_sigptr; |
8c87f69a | 2052 | u16 signal_length = 0; |
635d2b00 GKH |
2053 | |
2054 | /* Retrieve the entry at the head of the queue */ | |
2055 | q_index = CSR_WIFI_HIP_Q_NEXT_R_SLOT(sigq); | |
2056 | ||
2057 | /* Get a pointer to the containing card_signal_t struct */ | |
2058 | csptr = CSR_WIFI_HIP_Q_SLOT_DATA(sigq, q_index); | |
2059 | ||
2060 | /* Get the new length of the packed signal */ | |
2061 | signal_length = csptr->signal_length; | |
2062 | ||
2063 | if ((signal_length & 1) || (signal_length > UNIFI_PACKED_SIGBUF_SIZE)) | |
2064 | { | |
2065 | unifi_error(card->ospriv, "process_fh_queue: Bad len: %d\n", signal_length); | |
2066 | return CSR_RESULT_FAILURE; | |
2067 | } | |
2068 | ||
2069 | /* Need space for 2-byte SDIO protocol header + signal */ | |
8c87f69a | 2070 | sig_chunks = GET_CHUNKS_FOR(card->config_data.sig_frag_size, (u16)(signal_length + 2)); |
635d2b00 GKH |
2071 | |
2072 | free_chunks_in_fh_buffer = GET_CHUNKS_FOR(card->config_data.sig_frag_size, | |
8c87f69a | 2073 | (u16)((card->fh_buffer.buf + UNIFI_FH_BUF_SIZE) - card->fh_buffer.ptr)); |
635d2b00 GKH |
2074 | if (free_chunks_in_fh_buffer < sig_chunks) |
2075 | { | |
2076 | /* No more room */ | |
2077 | unifi_notice(card->ospriv, "proc_fh_cmd_q: no room in fh buffer for 0x%.4X, deferring\n", | |
8c87f69a | 2078 | (u16)(GET_SIGNAL_ID(csptr->sigbuf))); |
635d2b00 GKH |
2079 | break; |
2080 | } | |
2081 | ||
2082 | packed_sigptr = csptr->sigbuf; | |
2083 | ||
2084 | /* Claim and set up a from-host data slot */ | |
2085 | if (CSR_RESULT_FAILURE == CardWriteBulkData(card, csptr, UNIFI_TRAFFIC_Q_MLME)) | |
2086 | { | |
2087 | unifi_notice(card->ospriv, "proc_fh_cmd_q: no fh data slots for 0x%.4X, deferring\n", | |
8c87f69a | 2088 | (u16)(GET_SIGNAL_ID(csptr->sigbuf))); |
635d2b00 GKH |
2089 | break; |
2090 | } | |
2091 | ||
2092 | for (i = 0; i < UNIFI_MAX_DATA_REFERENCES; i++) | |
2093 | { | |
2094 | if (csptr->bulkdata[i].data_length == 0) | |
2095 | { | |
2096 | UNIFI_INIT_BULK_DATA(&bulkdata.d[i]); | |
2097 | } | |
2098 | else | |
2099 | { | |
2100 | bulkdata.d[i].os_data_ptr = csptr->bulkdata[i].os_data_ptr; | |
2101 | bulkdata.d[i].data_length = csptr->bulkdata[i].data_length; | |
2102 | } | |
2103 | ||
2104 | /* Pass the free responsibility to the lower layer. */ | |
2105 | UNIFI_INIT_BULK_DATA(&csptr->bulkdata[i]); | |
2106 | } | |
2107 | ||
2108 | unifi_trace(card->ospriv, UDBG2, "Sending signal 0x%.4X\n", | |
2109 | GET_SIGNAL_ID(packed_sigptr)); | |
2110 | #ifdef CSR_WIFI_HIP_NOISY | |
2111 | unifi_error(card->ospriv, "Sending signal 0x%.4X\n", | |
2112 | GET_SIGNAL_ID(packed_sigptr)); | |
2113 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2114 | ||
2115 | ||
2116 | /* Append packed signal to F-H buffer */ | |
2117 | total_length = sig_chunks * card->config_data.sig_frag_size; | |
2118 | ||
7e6f5794 | 2119 | card->fh_buffer.ptr[0] = (u8)(signal_length & 0xff); |
635d2b00 | 2120 | card->fh_buffer.ptr[1] = |
7e6f5794 | 2121 | (u8)(((signal_length >> 8) & 0xf) | (SDIO_CMD_SIGNAL << 4)); |
635d2b00 | 2122 | |
25aebdb1 | 2123 | memcpy(card->fh_buffer.ptr + 2, packed_sigptr, signal_length); |
b7244a31 | 2124 | memset(card->fh_buffer.ptr + 2 + signal_length, 0, |
635d2b00 GKH |
2125 | total_length - (2 + signal_length)); |
2126 | ||
2127 | #ifdef CSR_WIFI_HIP_NOISY | |
2128 | unifi_error(card->ospriv, "proc_fh: fh_buffer %d bytes \n", | |
2129 | signal_length + 2); | |
2130 | dump(card->fh_buffer.ptr, signal_length + 2); | |
2131 | unifi_trace(card->ospriv, UDBG1, " \n"); | |
2132 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2133 | ||
2134 | card->fh_buffer.ptr += total_length; | |
2135 | card->fh_buffer.count += sig_chunks; | |
2136 | ||
2137 | #ifdef CSR_WIFI_HIP_NOISY | |
2138 | unifi_error(card->ospriv, "Added %d to fh buf, len now %d, count %d\n", | |
2139 | signal_length, | |
2140 | card->fh_buffer.ptr - card->fh_buffer.buf, | |
2141 | card->fh_buffer.count); | |
2142 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2143 | ||
2144 | (*processed)++; | |
2145 | pending_chunks -= sig_chunks; | |
2146 | ||
2147 | /* Log the signal to the UDI. */ | |
2148 | /* UDI will get the packed structure */ | |
2149 | /* Can not log the unpacked signal, unless we reconstruct it! */ | |
2150 | if (card->udi_hook) | |
2151 | { | |
2152 | (*card->udi_hook)(card->ospriv, packed_sigptr, signal_length, | |
2153 | &bulkdata, UDI_LOG_FROM_HOST); | |
2154 | } | |
2155 | ||
2156 | /* Remove entry from q */ | |
2157 | csptr->signal_length = 0; | |
2158 | CSR_WIFI_HIP_Q_INC_R(sigq); | |
2159 | } | |
2160 | ||
2161 | return CSR_RESULT_SUCCESS; | |
2162 | } /* process_fh_cmd_queue() */ | |
2163 | ||
2164 | ||
2165 | /* | |
2166 | * --------------------------------------------------------------------------- | |
2167 | * process_fh_traffic_queue | |
2168 | * | |
2169 | * Take signals off the from-host queue and copy them to the UniFi. | |
2170 | * Does nothing if the UniFi has no slots free. | |
2171 | * | |
2172 | * Arguments: | |
2173 | * card Pointer to card context struct | |
2174 | * sigq Pointer to the traffic queue | |
2175 | * processed Pointer to location to write: | |
2176 | * 0 if there is nothing on the queue to process | |
2177 | * 1 if a signal was successfully processed | |
2178 | * | |
2179 | * Returns: | |
2180 | * CSR error code if an error occurred. | |
2181 | * | |
2182 | * Notes: | |
2183 | * The from-host queue contains signal requests from the network driver | |
2184 | * and any UDI clients interspersed. | |
2185 | * --------------------------------------------------------------------------- | |
2186 | */ | |
95e326c2 | 2187 | static CsrResult process_fh_traffic_queue(card_t *card, s32 *processed) |
635d2b00 GKH |
2188 | { |
2189 | q_t *sigq = card->fh_traffic_queue; | |
2190 | ||
2191 | CsrResult r; | |
ab2b8c73 | 2192 | s16 n = 0; |
95e326c2 | 2193 | s32 q_no; |
8c87f69a GKH |
2194 | u16 pending_sigs = 0; |
2195 | u16 pending_chunks = 0; | |
2196 | u16 needed_chunks; | |
95e326c2 | 2197 | s32 space_chunks; |
8c87f69a | 2198 | u16 q_index; |
26a6b2e1 | 2199 | u32 host_tag = 0; |
8c87f69a | 2200 | u16 slot_num = 0; |
635d2b00 GKH |
2201 | |
2202 | *processed = 0; | |
2203 | ||
2204 | /* calculate how many signals are in queues and how many chunks are needed. */ | |
2205 | for (n = UNIFI_NO_OF_TX_QS - 1; n >= 0; n--) | |
2206 | { | |
2207 | /* Get the number of pending signals. */ | |
2208 | pending_sigs += CSR_WIFI_HIP_Q_SLOTS_USED(&sigq[n]); | |
2209 | unifi_trace(card->ospriv, UDBG5, "proc_fh%d: %d pending\n", n, pending_sigs); | |
2210 | ||
2211 | /* Work out how many chunks we have waiting to send */ | |
2212 | for (q_index = CSR_WIFI_HIP_Q_NEXT_R_SLOT(&sigq[n]); | |
2213 | q_index != CSR_WIFI_HIP_Q_NEXT_W_SLOT(&sigq[n]); | |
2214 | q_index = CSR_WIFI_HIP_Q_WRAP(&sigq[n], q_index + 1)) | |
2215 | { | |
2216 | card_signal_t *csptr = CSR_WIFI_HIP_Q_SLOT_DATA(&sigq[n], q_index); | |
2217 | ||
2218 | /* | |
2219 | * Note that GET_CHUNKS_FOR() needs the size of the packed | |
2220 | * (wire-formatted) structure | |
2221 | */ | |
8c87f69a | 2222 | pending_chunks += GET_CHUNKS_FOR(card->config_data.sig_frag_size, (u16)(csptr->signal_length + 2)); |
635d2b00 GKH |
2223 | } |
2224 | } | |
2225 | ||
2226 | /* If there are no pending signals, just return */ | |
2227 | if (pending_sigs == 0) | |
2228 | { | |
2229 | /* Nothing to do */ | |
2230 | return CSR_RESULT_SUCCESS; | |
2231 | } | |
2232 | ||
2233 | /* | |
2234 | * Check whether UniFi has space for all the buffered bulk-data | |
2235 | * commands and signals as well. | |
2236 | */ | |
2237 | needed_chunks = pending_chunks + card->fh_buffer.count; | |
2238 | ||
2239 | /* Round up to the block size if necessary */ | |
2240 | ROUND_UP_NEEDED_CHUNKS(card, needed_chunks); | |
2241 | ||
2242 | r = check_fh_sig_slots(card, needed_chunks, &space_chunks); | |
2243 | if (r != CSR_RESULT_SUCCESS) | |
2244 | { | |
2245 | /* Error */ | |
2246 | unifi_error(card->ospriv, "Failed to read fh sig count\n"); | |
2247 | return r; | |
2248 | } | |
2249 | ||
2250 | #ifdef CSR_WIFI_HIP_NOISY | |
2251 | unifi_error(card->ospriv, | |
2252 | "process_fh_traffic_queue: %d chunks free, need %d\n", | |
2253 | space_chunks, needed_chunks); | |
2254 | read_fhsr(card); /* debugging only */ | |
2255 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2256 | ||
2257 | /* Coalesce as many from-host signals as possible | |
2258 | into a single block and write using a single CMD53 */ | |
8c87f69a | 2259 | if (needed_chunks > (u16)space_chunks) |
635d2b00 GKH |
2260 | { |
2261 | /* Round up to the block size if necessary */ | |
2262 | ROUND_UP_SPACE_CHUNKS(card, space_chunks); | |
2263 | ||
8c87f69a | 2264 | if ((u16)space_chunks <= card->fh_buffer.count) |
635d2b00 GKH |
2265 | { |
2266 | /* | |
2267 | * No room in UniFi for any signals after the buffered bulk | |
2268 | * data commands have been sent. | |
2269 | */ | |
2270 | unifi_error(card->ospriv, "not enough room to send signals, need %d chunks, %d free\n", | |
2271 | card->fh_buffer.count, space_chunks); | |
2272 | card->generate_interrupt = 1; | |
2273 | return 0; | |
2274 | } | |
2275 | ||
8c87f69a | 2276 | pending_chunks = (u16)space_chunks - card->fh_buffer.count; |
635d2b00 GKH |
2277 | } |
2278 | ||
2279 | q_no = UNIFI_NO_OF_TX_QS - 1; | |
2280 | ||
2281 | /* | |
2282 | * pending_sigs will be exhausted if there are is no restriction to the pending | |
2283 | * signals per queue. pending_chunks may be exhausted if there is a restriction. | |
2284 | * q_no check will be exhausted if there is a restriction and our round-robin | |
2285 | * algorith fails to fill all chunks. | |
2286 | */ | |
2287 | do | |
2288 | { | |
2289 | card_signal_t *csptr; | |
8c87f69a | 2290 | u16 sig_chunks, total_length, free_chunks_in_fh_buffer; |
635d2b00 | 2291 | bulk_data_param_t bulkdata; |
7e6f5794 | 2292 | u8 *packed_sigptr; |
8c87f69a | 2293 | u16 signal_length = 0; |
635d2b00 GKH |
2294 | |
2295 | /* if this queue is empty go to next one. */ | |
2296 | if (CSR_WIFI_HIP_Q_SLOTS_USED(&sigq[q_no]) == 0) | |
2297 | { | |
2298 | q_no--; | |
2299 | continue; | |
2300 | } | |
2301 | ||
2302 | /* Retrieve the entry at the head of the queue */ | |
2303 | q_index = CSR_WIFI_HIP_Q_NEXT_R_SLOT(&sigq[q_no]); | |
2304 | ||
2305 | /* Get a pointer to the containing card_signal_t struct */ | |
2306 | csptr = CSR_WIFI_HIP_Q_SLOT_DATA(&sigq[q_no], q_index); | |
2307 | ||
2308 | /* Get the new length of the packed signal */ | |
2309 | signal_length = csptr->signal_length; | |
2310 | ||
2311 | if ((signal_length & 1) || (signal_length > UNIFI_PACKED_SIGBUF_SIZE)) | |
2312 | { | |
2313 | unifi_error(card->ospriv, "process_fh_traffic_queue: Bad len: %d\n", signal_length); | |
2314 | return CSR_RESULT_FAILURE; | |
2315 | } | |
2316 | ||
2317 | /* Need space for 2-byte SDIO protocol header + signal */ | |
8c87f69a | 2318 | sig_chunks = GET_CHUNKS_FOR(card->config_data.sig_frag_size, (u16)(signal_length + 2)); |
635d2b00 | 2319 | free_chunks_in_fh_buffer = GET_CHUNKS_FOR(card->config_data.sig_frag_size, |
8c87f69a | 2320 | (u16)((card->fh_buffer.buf + UNIFI_FH_BUF_SIZE) - card->fh_buffer.ptr)); |
635d2b00 GKH |
2321 | if (free_chunks_in_fh_buffer < sig_chunks) |
2322 | { | |
2323 | /* No more room */ | |
2324 | unifi_notice(card->ospriv, "process_fh_traffic_queue: no more chunks.\n"); | |
2325 | break; | |
2326 | } | |
2327 | ||
2328 | packed_sigptr = csptr->sigbuf; | |
2329 | /* Claim and set up a from-host data slot */ | |
2330 | if (CSR_RESULT_FAILURE == CardWriteBulkData(card, csptr, (unifi_TrafficQueue)q_no)) | |
2331 | { | |
2332 | q_no--; | |
2333 | continue; | |
2334 | } | |
2335 | ||
2336 | /* Sanity check: MA-PACKET.req must have a valid bulk data */ | |
2337 | if ((csptr->bulkdata[0].data_length == 0) || (csptr->bulkdata[0].os_data_ptr == NULL)) | |
2338 | { | |
2339 | unifi_error(card->ospriv, "MA-PACKET.req with empty bulk data (%d bytes in %p)\n", | |
2340 | csptr->bulkdata[0].data_length, csptr->bulkdata[0].os_data_ptr); | |
2341 | dump(packed_sigptr, signal_length); | |
2342 | return CSR_RESULT_FAILURE; | |
2343 | } | |
2344 | ||
2345 | bulkdata.d[0].os_data_ptr = csptr->bulkdata[0].os_data_ptr; | |
2346 | bulkdata.d[0].data_length = csptr->bulkdata[0].data_length; | |
2347 | bulkdata.d[0].os_net_buf_ptr = csptr->bulkdata[0].os_net_buf_ptr; | |
2348 | bulkdata.d[0].net_buf_length = csptr->bulkdata[0].net_buf_length; | |
2349 | ||
2350 | /* The driver owns clearing of HIP slots for following scenario | |
2351 | * - driver has requested a MA-PACKET.req signal | |
2352 | * - The f/w after receiving the signal decides it can't send it out due to various reasons | |
2353 | * - So the f/w without downloading the bulk data decides to just send a confirmation with fail | |
2354 | * - and then sends a clear slot signal to HIP | |
2355 | * | |
2356 | * But in some cases the clear slot signal never comes and the slot remains --NOT-- freed for ever | |
2357 | * | |
2358 | * To handle this, HIP will keep the record of host tag for each occupied slot | |
2359 | * and then based on status of that Host tag and slot the driver will decide if the slot is | |
2360 | * cleared by f/w signal or the slot has to be freed by driver | |
2361 | */ | |
2362 | ||
2363 | if (card->fh_slot_host_tag_record) | |
2364 | { | |
2365 | /* Update the f-h slot record for the corresponding host tag */ | |
2366 | host_tag = GET_PACKED_MA_PACKET_REQUEST_HOST_TAG(packed_sigptr); | |
2367 | slot_num = GET_PACKED_DATAREF_SLOT(packed_sigptr, 0) & 0x00FF; | |
2368 | ||
2369 | unifi_trace(card->ospriv, UDBG5, | |
2370 | "process_fh_traffic_queue signal ID =%x fh slot=%x Host tag =%x\n", | |
2371 | GET_SIGNAL_ID(packed_sigptr), slot_num, host_tag); | |
2372 | card->fh_slot_host_tag_record[slot_num] = host_tag; | |
2373 | } | |
2374 | UNIFI_INIT_BULK_DATA(&bulkdata.d[1]); | |
2375 | UNIFI_INIT_BULK_DATA(&csptr->bulkdata[0]); | |
2376 | UNIFI_INIT_BULK_DATA(&csptr->bulkdata[1]); | |
2377 | ||
2378 | #ifdef CSR_WIFI_HIP_DATA_PLANE_PROFILE | |
2379 | if (bulkdata.d[0].os_data_ptr) | |
2380 | { | |
2381 | if ((*bulkdata.d[0].os_data_ptr) & 0x08) | |
2382 | { | |
2383 | card->cmd_prof.tx_count++; | |
2384 | } | |
2385 | } | |
2386 | #endif | |
2387 | unifi_trace(card->ospriv, UDBG3, "Sending signal 0x%.4X\n", | |
2388 | GET_SIGNAL_ID(packed_sigptr)); | |
2389 | #ifdef CSR_WIFI_HIP_NOISY | |
2390 | unifi_error(card->ospriv, "Sending signal 0x%.4X\n", | |
2391 | GET_SIGNAL_ID(packed_sigptr)); | |
2392 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2393 | ||
2394 | /* Append packed signal to F-H buffer */ | |
2395 | total_length = sig_chunks * card->config_data.sig_frag_size; | |
2396 | ||
7e6f5794 | 2397 | card->fh_buffer.ptr[0] = (u8)(signal_length & 0xff); |
635d2b00 | 2398 | card->fh_buffer.ptr[1] = |
7e6f5794 | 2399 | (u8)(((signal_length >> 8) & 0xf) | (SDIO_CMD_SIGNAL << 4)); |
635d2b00 | 2400 | |
25aebdb1 | 2401 | memcpy(card->fh_buffer.ptr + 2, packed_sigptr, signal_length); |
b7244a31 | 2402 | memset(card->fh_buffer.ptr + 2 + signal_length, 0, |
635d2b00 GKH |
2403 | total_length - (2 + signal_length)); |
2404 | ||
2405 | #ifdef CSR_WIFI_HIP_NOISY | |
2406 | unifi_error(card->ospriv, "proc_fh: fh_buffer %d bytes \n", | |
2407 | signal_length + 2); | |
2408 | dump(card->fh_buffer.ptr, signal_length + 2); | |
2409 | unifi_trace(card->ospriv, UDBG1, " \n"); | |
2410 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2411 | ||
2412 | card->fh_buffer.ptr += total_length; | |
2413 | card->fh_buffer.count += sig_chunks; | |
2414 | ||
2415 | #ifdef CSR_WIFI_HIP_NOISY | |
2416 | unifi_error(card->ospriv, "Added %d to fh buf, len now %d, count %d\n", | |
2417 | signal_length, | |
2418 | card->fh_buffer.ptr - card->fh_buffer.buf, | |
2419 | card->fh_buffer.count); | |
2420 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2421 | ||
2422 | (*processed)++; | |
2423 | pending_sigs--; | |
2424 | pending_chunks -= sig_chunks; | |
2425 | ||
2426 | /* Log the signal to the UDI. */ | |
2427 | /* UDI will get the packed structure */ | |
2428 | /* Can not log the unpacked signal, unless we reconstruct it! */ | |
2429 | if (card->udi_hook) | |
2430 | { | |
2431 | (*card->udi_hook)(card->ospriv, packed_sigptr, signal_length, | |
2432 | &bulkdata, UDI_LOG_FROM_HOST); | |
2433 | } | |
2434 | ||
2435 | /* Remove entry from q */ | |
2436 | csptr->signal_length = 0; | |
2437 | /* Note that the traffic queue has only one valid bulk data buffer. */ | |
2438 | csptr->bulkdata[0].data_length = 0; | |
2439 | ||
2440 | CSR_WIFI_HIP_Q_INC_R(&sigq[q_no]); | |
2441 | } while ((pending_sigs > 0) && (pending_chunks > 0) && (q_no >= 0)); | |
2442 | ||
2443 | return CSR_RESULT_SUCCESS; | |
2444 | } /* process_fh_traffic_queue() */ | |
2445 | ||
2446 | ||
2447 | /* | |
2448 | * --------------------------------------------------------------------------- | |
2449 | * flush_fh_buffer | |
2450 | * | |
2451 | * Write out the cache from-hosts signals to the UniFi. | |
2452 | * | |
2453 | * Arguments: | |
2454 | * card Pointer to card context struct | |
2455 | * | |
2456 | * Returns: | |
2457 | * CSR error code if an SDIO error occurred. | |
2458 | * --------------------------------------------------------------------------- | |
2459 | */ | |
2460 | static CsrResult flush_fh_buffer(card_t *card) | |
2461 | { | |
2462 | CsrResult r; | |
8c87f69a GKH |
2463 | u16 len; |
2464 | u16 sig_units; | |
2465 | u16 data_round; | |
2466 | u16 chunks_in_last_block; | |
2467 | u16 padding_chunks; | |
2468 | u16 i; | |
635d2b00 GKH |
2469 | |
2470 | len = card->fh_buffer.ptr - card->fh_buffer.buf; | |
2471 | ||
2472 | #ifdef CSR_WIFI_HIP_NOISY | |
2473 | unifi_error(card->ospriv, "fh_buffer is at %p, ptr= %p\n", | |
2474 | card->fh_buffer.buf, card->fh_buffer.ptr); | |
2475 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2476 | ||
2477 | if (len == 0) | |
2478 | { | |
2479 | return CSR_RESULT_SUCCESS; | |
2480 | } | |
2481 | ||
2482 | #ifdef CSR_WIFI_HIP_NOISY | |
2483 | if (dump_fh_buf) | |
2484 | { | |
2485 | dump(card->fh_buffer.buf, len); | |
2486 | dump_fh_buf = 0; | |
2487 | } | |
2488 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2489 | ||
2490 | if (card->sdio_io_block_pad) | |
2491 | { | |
2492 | /* Both of these are powers of 2 */ | |
2493 | sig_units = card->config_data.sig_frag_size; | |
2494 | data_round = card->sdio_io_block_size; | |
2495 | ||
2496 | if (data_round > sig_units) | |
2497 | { | |
2498 | chunks_in_last_block = (len % data_round) / sig_units; | |
2499 | ||
2500 | if (chunks_in_last_block != 0) | |
2501 | { | |
2502 | padding_chunks = (data_round / sig_units) - chunks_in_last_block; | |
2503 | ||
b7244a31 | 2504 | memset(card->fh_buffer.ptr, 0, padding_chunks * sig_units); |
635d2b00 GKH |
2505 | for (i = 0; i < padding_chunks; i++) |
2506 | { | |
2507 | card->fh_buffer.ptr[1] = SDIO_CMD_PADDING << 4; | |
2508 | card->fh_buffer.ptr += sig_units; | |
2509 | } | |
2510 | ||
2511 | card->fh_buffer.count += padding_chunks; | |
2512 | len += padding_chunks * sig_units; | |
2513 | } | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | r = unifi_bulk_rw(card, | |
2518 | card->config_data.fromhost_sigbuf_handle, | |
2519 | card->fh_buffer.buf, | |
2520 | len, UNIFI_SDIO_WRITE); | |
2521 | if (r == CSR_WIFI_HIP_RESULT_NO_DEVICE) | |
2522 | { | |
2523 | return r; | |
2524 | } | |
2525 | if (r != CSR_RESULT_SUCCESS) | |
2526 | { | |
2527 | unifi_error(card->ospriv, "Failed to write fh signals: %u bytes, error %d\n", len, r); | |
2528 | return r; | |
2529 | } | |
2530 | ||
2531 | /* Update from-host-signals-written signal count */ | |
2532 | card->from_host_signals_w = | |
2533 | (card->from_host_signals_w + card->fh_buffer.count) % 128u; | |
2534 | r = unifi_write_8_or_16(card, card->sdio_ctrl_addr + 0, | |
7e6f5794 | 2535 | (u8)card->from_host_signals_w); |
635d2b00 GKH |
2536 | if (r != CSR_RESULT_SUCCESS) |
2537 | { | |
2538 | unifi_error(card->ospriv, "Failed to write fh signal count %u with error %d\n", | |
2539 | card->from_host_signals_w, r); | |
2540 | return r; | |
2541 | } | |
2542 | card->generate_interrupt = 1; | |
2543 | ||
2544 | /* Reset the fh buffer pointer */ | |
2545 | card->fh_buffer.ptr = card->fh_buffer.buf; | |
2546 | card->fh_buffer.count = 0; | |
2547 | ||
2548 | #ifdef CSR_WIFI_HIP_NOISY | |
2549 | unifi_error(card->ospriv, "END flush: fh len %d, count %d\n", | |
2550 | card->fh_buffer.ptr - card->fh_buffer.buf, | |
2551 | card->fh_buffer.count); | |
2552 | #endif /* CSR_WIFI_HIP_NOISY */ | |
2553 | ||
2554 | return CSR_RESULT_SUCCESS; | |
2555 | } /* flush_fh_buffer() */ | |
2556 | ||
2557 | ||
2558 | /* | |
2559 | * --------------------------------------------------------------------------- | |
2560 | * restart_packet_flow | |
2561 | * | |
2562 | * This function is called before the bottom-half thread sleeps. | |
2563 | * It checks whether both data and signal resources are available and | |
2564 | * then calls the OS-layer function to re-enable packet transmission. | |
2565 | * | |
2566 | * Arguments: | |
2567 | * card Pointer to card context struct | |
2568 | * | |
2569 | * Returns: | |
2570 | * None. | |
2571 | * --------------------------------------------------------------------------- | |
2572 | */ | |
2573 | static void restart_packet_flow(card_t *card) | |
2574 | { | |
7e6f5794 | 2575 | u8 q; |
635d2b00 GKH |
2576 | |
2577 | /* | |
2578 | * We only look at the fh_traffic_queue, because that is where packets from | |
2579 | * the network stack are placed. | |
2580 | */ | |
2581 | for (q = 0; q <= UNIFI_TRAFFIC_Q_VO; q++) | |
2582 | { | |
2583 | if (card_is_tx_q_paused(card, q) && | |
2584 | CSR_WIFI_HIP_Q_SLOTS_FREE(&card->fh_traffic_queue[q]) >= RESUME_XMIT_THRESHOLD) | |
2585 | { | |
2586 | #if defined (CSR_WIFI_HIP_DEBUG_OFFLINE) && defined (CSR_WIFI_HIP_DATA_PLANE_PROFILE) | |
2587 | unifi_debug_log_to_buf("U"); | |
2588 | #endif | |
2589 | card_tx_q_unpause(card, q); | |
2590 | unifi_restart_xmit(card->ospriv, (unifi_TrafficQueue)q); | |
2591 | } | |
2592 | } | |
2593 | } /* restart_packet_flow() */ | |
2594 | ||
2595 |