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path: root/drivers/net/wireless/iwlwifi/iwl-rx.c
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Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-rx.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-rx.c826
1 files changed, 77 insertions, 749 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index e5eb339107dd..0a5d7cf25196 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -163,197 +163,6 @@ void iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q
163 spin_unlock_irqrestore(&q->lock, flags); 163 spin_unlock_irqrestore(&q->lock, flags);
164} 164}
165EXPORT_SYMBOL(iwl_rx_queue_update_write_ptr); 165EXPORT_SYMBOL(iwl_rx_queue_update_write_ptr);
166/**
167 * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
168 */
169static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
170 dma_addr_t dma_addr)
171{
172 return cpu_to_le32((u32)(dma_addr >> 8));
173}
174
175/**
176 * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
177 *
178 * If there are slots in the RX queue that need to be restocked,
179 * and we have free pre-allocated buffers, fill the ranks as much
180 * as we can, pulling from rx_free.
181 *
182 * This moves the 'write' index forward to catch up with 'processed', and
183 * also updates the memory address in the firmware to reference the new
184 * target buffer.
185 */
186void iwl_rx_queue_restock(struct iwl_priv *priv)
187{
188 struct iwl_rx_queue *rxq = &priv->rxq;
189 struct list_head *element;
190 struct iwl_rx_mem_buffer *rxb;
191 unsigned long flags;
192 int write;
193
194 spin_lock_irqsave(&rxq->lock, flags);
195 write = rxq->write & ~0x7;
196 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
197 /* Get next free Rx buffer, remove from free list */
198 element = rxq->rx_free.next;
199 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
200 list_del(element);
201
202 /* Point to Rx buffer via next RBD in circular buffer */
203 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->page_dma);
204 rxq->queue[rxq->write] = rxb;
205 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
206 rxq->free_count--;
207 }
208 spin_unlock_irqrestore(&rxq->lock, flags);
209 /* If the pre-allocated buffer pool is dropping low, schedule to
210 * refill it */
211 if (rxq->free_count <= RX_LOW_WATERMARK)
212 queue_work(priv->workqueue, &priv->rx_replenish);
213
214
215 /* If we've added more space for the firmware to place data, tell it.
216 * Increment device's write pointer in multiples of 8. */
217 if (rxq->write_actual != (rxq->write & ~0x7)) {
218 spin_lock_irqsave(&rxq->lock, flags);
219 rxq->need_update = 1;
220 spin_unlock_irqrestore(&rxq->lock, flags);
221 iwl_rx_queue_update_write_ptr(priv, rxq);
222 }
223}
224EXPORT_SYMBOL(iwl_rx_queue_restock);
225
226
227/**
228 * iwl_rx_replenish - Move all used packet from rx_used to rx_free
229 *
230 * When moving to rx_free an SKB is allocated for the slot.
231 *
232 * Also restock the Rx queue via iwl_rx_queue_restock.
233 * This is called as a scheduled work item (except for during initialization)
234 */
235void iwl_rx_allocate(struct iwl_priv *priv, gfp_t priority)
236{
237 struct iwl_rx_queue *rxq = &priv->rxq;
238 struct list_head *element;
239 struct iwl_rx_mem_buffer *rxb;
240 struct page *page;
241 unsigned long flags;
242 gfp_t gfp_mask = priority;
243
244 while (1) {
245 spin_lock_irqsave(&rxq->lock, flags);
246 if (list_empty(&rxq->rx_used)) {
247 spin_unlock_irqrestore(&rxq->lock, flags);
248 return;
249 }
250 spin_unlock_irqrestore(&rxq->lock, flags);
251
252 if (rxq->free_count > RX_LOW_WATERMARK)
253 gfp_mask |= __GFP_NOWARN;
254
255 if (priv->hw_params.rx_page_order > 0)
256 gfp_mask |= __GFP_COMP;
257
258 /* Alloc a new receive buffer */
259 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
260 if (!page) {
261 if (net_ratelimit())
262 IWL_DEBUG_INFO(priv, "alloc_pages failed, "
263 "order: %d\n",
264 priv->hw_params.rx_page_order);
265
266 if ((rxq->free_count <= RX_LOW_WATERMARK) &&
267 net_ratelimit())
268 IWL_CRIT(priv, "Failed to alloc_pages with %s. Only %u free buffers remaining.\n",
269 priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
270 rxq->free_count);
271 /* We don't reschedule replenish work here -- we will
272 * call the restock method and if it still needs
273 * more buffers it will schedule replenish */
274 return;
275 }
276
277 spin_lock_irqsave(&rxq->lock, flags);
278
279 if (list_empty(&rxq->rx_used)) {
280 spin_unlock_irqrestore(&rxq->lock, flags);
281 __free_pages(page, priv->hw_params.rx_page_order);
282 return;
283 }
284 element = rxq->rx_used.next;
285 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
286 list_del(element);
287
288 spin_unlock_irqrestore(&rxq->lock, flags);
289
290 rxb->page = page;
291 /* Get physical address of the RB */
292 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
293 PAGE_SIZE << priv->hw_params.rx_page_order,
294 PCI_DMA_FROMDEVICE);
295 /* dma address must be no more than 36 bits */
296 BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36));
297 /* and also 256 byte aligned! */
298 BUG_ON(rxb->page_dma & DMA_BIT_MASK(8));
299
300 spin_lock_irqsave(&rxq->lock, flags);
301
302 list_add_tail(&rxb->list, &rxq->rx_free);
303 rxq->free_count++;
304 priv->alloc_rxb_page++;
305
306 spin_unlock_irqrestore(&rxq->lock, flags);
307 }
308}
309
310void iwl_rx_replenish(struct iwl_priv *priv)
311{
312 unsigned long flags;
313
314 iwl_rx_allocate(priv, GFP_KERNEL);
315
316 spin_lock_irqsave(&priv->lock, flags);
317 iwl_rx_queue_restock(priv);
318 spin_unlock_irqrestore(&priv->lock, flags);
319}
320EXPORT_SYMBOL(iwl_rx_replenish);
321
322void iwl_rx_replenish_now(struct iwl_priv *priv)
323{
324 iwl_rx_allocate(priv, GFP_ATOMIC);
325
326 iwl_rx_queue_restock(priv);
327}
328EXPORT_SYMBOL(iwl_rx_replenish_now);
329
330
331/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
332 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
333 * This free routine walks the list of POOL entries and if SKB is set to
334 * non NULL it is unmapped and freed
335 */
336void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
337{
338 int i;
339 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
340 if (rxq->pool[i].page != NULL) {
341 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
342 PAGE_SIZE << priv->hw_params.rx_page_order,
343 PCI_DMA_FROMDEVICE);
344 __iwl_free_pages(priv, rxq->pool[i].page);
345 rxq->pool[i].page = NULL;
346 }
347 }
348
349 dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
350 rxq->dma_addr);
351 dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
352 rxq->rb_stts, rxq->rb_stts_dma);
353 rxq->bd = NULL;
354 rxq->rb_stts = NULL;
355}
356EXPORT_SYMBOL(iwl_rx_queue_free);
357 166
358int iwl_rx_queue_alloc(struct iwl_priv *priv) 167int iwl_rx_queue_alloc(struct iwl_priv *priv)
359{ 168{
@@ -396,98 +205,6 @@ err_bd:
396} 205}
397EXPORT_SYMBOL(iwl_rx_queue_alloc); 206EXPORT_SYMBOL(iwl_rx_queue_alloc);
398 207
399void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
400{
401 unsigned long flags;
402 int i;
403 spin_lock_irqsave(&rxq->lock, flags);
404 INIT_LIST_HEAD(&rxq->rx_free);
405 INIT_LIST_HEAD(&rxq->rx_used);
406 /* Fill the rx_used queue with _all_ of the Rx buffers */
407 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
408 /* In the reset function, these buffers may have been allocated
409 * to an SKB, so we need to unmap and free potential storage */
410 if (rxq->pool[i].page != NULL) {
411 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
412 PAGE_SIZE << priv->hw_params.rx_page_order,
413 PCI_DMA_FROMDEVICE);
414 __iwl_free_pages(priv, rxq->pool[i].page);
415 rxq->pool[i].page = NULL;
416 }
417 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
418 }
419
420 /* Set us so that we have processed and used all buffers, but have
421 * not restocked the Rx queue with fresh buffers */
422 rxq->read = rxq->write = 0;
423 rxq->write_actual = 0;
424 rxq->free_count = 0;
425 spin_unlock_irqrestore(&rxq->lock, flags);
426}
427
428int iwl_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
429{
430 u32 rb_size;
431 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
432 u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT for all devices? */
433
434 if (!priv->cfg->use_isr_legacy)
435 rb_timeout = RX_RB_TIMEOUT;
436
437 if (priv->cfg->mod_params->amsdu_size_8K)
438 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
439 else
440 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
441
442 /* Stop Rx DMA */
443 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
444
445 /* Reset driver's Rx queue write index */
446 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
447
448 /* Tell device where to find RBD circular buffer in DRAM */
449 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
450 (u32)(rxq->dma_addr >> 8));
451
452 /* Tell device where in DRAM to update its Rx status */
453 iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
454 rxq->rb_stts_dma >> 4);
455
456 /* Enable Rx DMA
457 * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in
458 * the credit mechanism in 5000 HW RX FIFO
459 * Direct rx interrupts to hosts
460 * Rx buffer size 4 or 8k
461 * RB timeout 0x10
462 * 256 RBDs
463 */
464 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
465 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
466 FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
467 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
468 FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
469 rb_size|
470 (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
471 (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
472
473 /* Set interrupt coalescing timer to default (2048 usecs) */
474 iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF);
475
476 return 0;
477}
478
479int iwl_rxq_stop(struct iwl_priv *priv)
480{
481
482 /* stop Rx DMA */
483 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
484 iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
485 FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
486
487 return 0;
488}
489EXPORT_SYMBOL(iwl_rxq_stop);
490
491void iwl_rx_missed_beacon_notif(struct iwl_priv *priv, 208void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
492 struct iwl_rx_mem_buffer *rxb) 209 struct iwl_rx_mem_buffer *rxb)
493 210
@@ -543,6 +260,7 @@ static void iwl_rx_calc_noise(struct iwl_priv *priv)
543 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; 260 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
544 int bcn_silence_c = 261 int bcn_silence_c =
545 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; 262 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
263 int last_rx_noise;
546 264
547 if (bcn_silence_a) { 265 if (bcn_silence_a) {
548 total_silence += bcn_silence_a; 266 total_silence += bcn_silence_a;
@@ -559,13 +277,13 @@ static void iwl_rx_calc_noise(struct iwl_priv *priv)
559 277
560 /* Average among active antennas */ 278 /* Average among active antennas */
561 if (num_active_rx) 279 if (num_active_rx)
562 priv->last_rx_noise = (total_silence / num_active_rx) - 107; 280 last_rx_noise = (total_silence / num_active_rx) - 107;
563 else 281 else
564 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; 282 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
565 283
566 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n", 284 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
567 bcn_silence_a, bcn_silence_b, bcn_silence_c, 285 bcn_silence_a, bcn_silence_b, bcn_silence_c,
568 priv->last_rx_noise); 286 last_rx_noise);
569} 287}
570 288
571#ifdef CONFIG_IWLWIFI_DEBUG 289#ifdef CONFIG_IWLWIFI_DEBUG
@@ -617,29 +335,20 @@ static void iwl_accumulative_statistics(struct iwl_priv *priv,
617 335
618#define REG_RECALIB_PERIOD (60) 336#define REG_RECALIB_PERIOD (60)
619 337
620#define PLCP_MSG "plcp_err exceeded %u, %u, %u, %u, %u, %d, %u mSecs\n" 338/**
621void iwl_rx_statistics(struct iwl_priv *priv, 339 * iwl_good_plcp_health - checks for plcp error.
622 struct iwl_rx_mem_buffer *rxb) 340 *
341 * When the plcp error is exceeding the thresholds, reset the radio
342 * to improve the throughput.
343 */
344bool iwl_good_plcp_health(struct iwl_priv *priv,
345 struct iwl_rx_packet *pkt)
623{ 346{
624 int change; 347 bool rc = true;
625 struct iwl_rx_packet *pkt = rxb_addr(rxb);
626 int combined_plcp_delta; 348 int combined_plcp_delta;
627 unsigned int plcp_msec; 349 unsigned int plcp_msec;
628 unsigned long plcp_received_jiffies; 350 unsigned long plcp_received_jiffies;
629 351
630 IWL_DEBUG_RX(priv, "Statistics notification received (%d vs %d).\n",
631 (int)sizeof(priv->statistics),
632 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
633
634 change = ((priv->statistics.general.temperature !=
635 pkt->u.stats.general.temperature) ||
636 ((priv->statistics.flag &
637 STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
638 (pkt->u.stats.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
639
640#ifdef CONFIG_IWLWIFI_DEBUG
641 iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
642#endif
643 /* 352 /*
644 * check for plcp_err and trigger radio reset if it exceeds 353 * check for plcp_err and trigger radio reset if it exceeds
645 * the plcp error threshold plcp_delta. 354 * the plcp error threshold plcp_delta.
@@ -660,11 +369,11 @@ void iwl_rx_statistics(struct iwl_priv *priv,
660 le32_to_cpu(priv->statistics.rx.ofdm_ht.plcp_err)); 369 le32_to_cpu(priv->statistics.rx.ofdm_ht.plcp_err));
661 370
662 if ((combined_plcp_delta > 0) && 371 if ((combined_plcp_delta > 0) &&
663 ((combined_plcp_delta * 100) / plcp_msec) > 372 ((combined_plcp_delta * 100) / plcp_msec) >
664 priv->cfg->plcp_delta_threshold) { 373 priv->cfg->plcp_delta_threshold) {
665 /* 374 /*
666 * if plcp_err exceed the threshold, the following 375 * if plcp_err exceed the threshold,
667 * data is printed in csv format: 376 * the following data is printed in csv format:
668 * Text: plcp_err exceeded %d, 377 * Text: plcp_err exceeded %d,
669 * Received ofdm.plcp_err, 378 * Received ofdm.plcp_err,
670 * Current ofdm.plcp_err, 379 * Current ofdm.plcp_err,
@@ -673,22 +382,76 @@ void iwl_rx_statistics(struct iwl_priv *priv,
673 * combined_plcp_delta, 382 * combined_plcp_delta,
674 * plcp_msec 383 * plcp_msec
675 */ 384 */
676 IWL_DEBUG_RADIO(priv, PLCP_MSG, 385 IWL_DEBUG_RADIO(priv, "plcp_err exceeded %u, "
386 "%u, %u, %u, %u, %d, %u mSecs\n",
677 priv->cfg->plcp_delta_threshold, 387 priv->cfg->plcp_delta_threshold,
678 le32_to_cpu(pkt->u.stats.rx.ofdm.plcp_err), 388 le32_to_cpu(pkt->u.stats.rx.ofdm.plcp_err),
679 le32_to_cpu(priv->statistics.rx.ofdm.plcp_err), 389 le32_to_cpu(priv->statistics.rx.ofdm.plcp_err),
680 le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err), 390 le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err),
681 le32_to_cpu( 391 le32_to_cpu(
682 priv->statistics.rx.ofdm_ht.plcp_err), 392 priv->statistics.rx.ofdm_ht.plcp_err),
683 combined_plcp_delta, plcp_msec); 393 combined_plcp_delta, plcp_msec);
394 rc = false;
395 }
396 }
397 return rc;
398}
399EXPORT_SYMBOL(iwl_good_plcp_health);
684 400
685 /* 401void iwl_recover_from_statistics(struct iwl_priv *priv,
686 * Reset the RF radio due to the high plcp 402 struct iwl_rx_packet *pkt)
687 * error rate 403{
688 */ 404 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
689 iwl_force_reset(priv, IWL_RF_RESET); 405 return;
406 if (iwl_is_associated(priv)) {
407 if (priv->cfg->ops->lib->check_ack_health) {
408 if (!priv->cfg->ops->lib->check_ack_health(
409 priv, pkt)) {
410 /*
411 * low ack count detected
412 * restart Firmware
413 */
414 IWL_ERR(priv, "low ack count detected, "
415 "restart firmware\n");
416 if (!iwl_force_reset(priv, IWL_FW_RESET))
417 return;
418 }
419 }
420 if (priv->cfg->ops->lib->check_plcp_health) {
421 if (!priv->cfg->ops->lib->check_plcp_health(
422 priv, pkt)) {
423 /*
424 * high plcp error detected
425 * reset Radio
426 */
427 iwl_force_reset(priv, IWL_RF_RESET);
428 }
690 } 429 }
691 } 430 }
431}
432EXPORT_SYMBOL(iwl_recover_from_statistics);
433
434void iwl_rx_statistics(struct iwl_priv *priv,
435 struct iwl_rx_mem_buffer *rxb)
436{
437 int change;
438 struct iwl_rx_packet *pkt = rxb_addr(rxb);
439
440
441 IWL_DEBUG_RX(priv, "Statistics notification received (%d vs %d).\n",
442 (int)sizeof(priv->statistics),
443 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
444
445 change = ((priv->statistics.general.temperature !=
446 pkt->u.stats.general.temperature) ||
447 ((priv->statistics.flag &
448 STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
449 (pkt->u.stats.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
450
451#ifdef CONFIG_IWLWIFI_DEBUG
452 iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
453#endif
454 iwl_recover_from_statistics(priv, pkt);
692 455
693 memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics)); 456 memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
694 457
@@ -731,139 +494,6 @@ void iwl_reply_statistics(struct iwl_priv *priv,
731} 494}
732EXPORT_SYMBOL(iwl_reply_statistics); 495EXPORT_SYMBOL(iwl_reply_statistics);
733 496
734/* Calc max signal level (dBm) among 3 possible receivers */
735static inline int iwl_calc_rssi(struct iwl_priv *priv,
736 struct iwl_rx_phy_res *rx_resp)
737{
738 return priv->cfg->ops->utils->calc_rssi(priv, rx_resp);
739}
740
741#ifdef CONFIG_IWLWIFI_DEBUG
742/**
743 * iwl_dbg_report_frame - dump frame to syslog during debug sessions
744 *
745 * You may hack this function to show different aspects of received frames,
746 * including selective frame dumps.
747 * group100 parameter selects whether to show 1 out of 100 good data frames.
748 * All beacon and probe response frames are printed.
749 */
750static void iwl_dbg_report_frame(struct iwl_priv *priv,
751 struct iwl_rx_phy_res *phy_res, u16 length,
752 struct ieee80211_hdr *header, int group100)
753{
754 u32 to_us;
755 u32 print_summary = 0;
756 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
757 u32 hundred = 0;
758 u32 dataframe = 0;
759 __le16 fc;
760 u16 seq_ctl;
761 u16 channel;
762 u16 phy_flags;
763 u32 rate_n_flags;
764 u32 tsf_low;
765 int rssi;
766
767 if (likely(!(iwl_get_debug_level(priv) & IWL_DL_RX)))
768 return;
769
770 /* MAC header */
771 fc = header->frame_control;
772 seq_ctl = le16_to_cpu(header->seq_ctrl);
773
774 /* metadata */
775 channel = le16_to_cpu(phy_res->channel);
776 phy_flags = le16_to_cpu(phy_res->phy_flags);
777 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
778
779 /* signal statistics */
780 rssi = iwl_calc_rssi(priv, phy_res);
781 tsf_low = le64_to_cpu(phy_res->timestamp) & 0x0ffffffff;
782
783 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
784
785 /* if data frame is to us and all is good,
786 * (optionally) print summary for only 1 out of every 100 */
787 if (to_us && (fc & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) ==
788 cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
789 dataframe = 1;
790 if (!group100)
791 print_summary = 1; /* print each frame */
792 else if (priv->framecnt_to_us < 100) {
793 priv->framecnt_to_us++;
794 print_summary = 0;
795 } else {
796 priv->framecnt_to_us = 0;
797 print_summary = 1;
798 hundred = 1;
799 }
800 } else {
801 /* print summary for all other frames */
802 print_summary = 1;
803 }
804
805 if (print_summary) {
806 char *title;
807 int rate_idx;
808 u32 bitrate;
809
810 if (hundred)
811 title = "100Frames";
812 else if (ieee80211_has_retry(fc))
813 title = "Retry";
814 else if (ieee80211_is_assoc_resp(fc))
815 title = "AscRsp";
816 else if (ieee80211_is_reassoc_resp(fc))
817 title = "RasRsp";
818 else if (ieee80211_is_probe_resp(fc)) {
819 title = "PrbRsp";
820 print_dump = 1; /* dump frame contents */
821 } else if (ieee80211_is_beacon(fc)) {
822 title = "Beacon";
823 print_dump = 1; /* dump frame contents */
824 } else if (ieee80211_is_atim(fc))
825 title = "ATIM";
826 else if (ieee80211_is_auth(fc))
827 title = "Auth";
828 else if (ieee80211_is_deauth(fc))
829 title = "DeAuth";
830 else if (ieee80211_is_disassoc(fc))
831 title = "DisAssoc";
832 else
833 title = "Frame";
834
835 rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags);
836 if (unlikely((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT))) {
837 bitrate = 0;
838 WARN_ON_ONCE(1);
839 } else {
840 bitrate = iwl_rates[rate_idx].ieee / 2;
841 }
842
843 /* print frame summary.
844 * MAC addresses show just the last byte (for brevity),
845 * but you can hack it to show more, if you'd like to. */
846 if (dataframe)
847 IWL_DEBUG_RX(priv, "%s: mhd=0x%04x, dst=0x%02x, "
848 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
849 title, le16_to_cpu(fc), header->addr1[5],
850 length, rssi, channel, bitrate);
851 else {
852 /* src/dst addresses assume managed mode */
853 IWL_DEBUG_RX(priv, "%s: 0x%04x, dst=0x%02x, src=0x%02x, "
854 "len=%u, rssi=%d, tim=%lu usec, "
855 "phy=0x%02x, chnl=%d\n",
856 title, le16_to_cpu(fc), header->addr1[5],
857 header->addr3[5], length, rssi,
858 tsf_low - priv->scan_start_tsf,
859 phy_flags, channel);
860 }
861 }
862 if (print_dump)
863 iwl_print_hex_dump(priv, IWL_DL_RX, header, length);
864}
865#endif
866
867/* 497/*
868 * returns non-zero if packet should be dropped 498 * returns non-zero if packet should be dropped
869 */ 499 */
@@ -911,305 +541,3 @@ int iwl_set_decrypted_flag(struct iwl_priv *priv,
911 return 0; 541 return 0;
912} 542}
913EXPORT_SYMBOL(iwl_set_decrypted_flag); 543EXPORT_SYMBOL(iwl_set_decrypted_flag);
914
915static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
916{
917 u32 decrypt_out = 0;
918
919 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
920 RX_RES_STATUS_STATION_FOUND)
921 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
922 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
923
924 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
925
926 /* packet was not encrypted */
927 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
928 RX_RES_STATUS_SEC_TYPE_NONE)
929 return decrypt_out;
930
931 /* packet was encrypted with unknown alg */
932 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
933 RX_RES_STATUS_SEC_TYPE_ERR)
934 return decrypt_out;
935
936 /* decryption was not done in HW */
937 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
938 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
939 return decrypt_out;
940
941 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
942
943 case RX_RES_STATUS_SEC_TYPE_CCMP:
944 /* alg is CCM: check MIC only */
945 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
946 /* Bad MIC */
947 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
948 else
949 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
950
951 break;
952
953 case RX_RES_STATUS_SEC_TYPE_TKIP:
954 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
955 /* Bad TTAK */
956 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
957 break;
958 }
959 /* fall through if TTAK OK */
960 default:
961 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
962 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
963 else
964 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
965 break;
966 };
967
968 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
969 decrypt_in, decrypt_out);
970
971 return decrypt_out;
972}
973
974static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
975 struct ieee80211_hdr *hdr,
976 u16 len,
977 u32 ampdu_status,
978 struct iwl_rx_mem_buffer *rxb,
979 struct ieee80211_rx_status *stats)
980{
981 struct sk_buff *skb;
982 int ret = 0;
983 __le16 fc = hdr->frame_control;
984
985 /* We only process data packets if the interface is open */
986 if (unlikely(!priv->is_open)) {
987 IWL_DEBUG_DROP_LIMIT(priv,
988 "Dropping packet while interface is not open.\n");
989 return;
990 }
991
992 /* In case of HW accelerated crypto and bad decryption, drop */
993 if (!priv->cfg->mod_params->sw_crypto &&
994 iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats))
995 return;
996
997 skb = alloc_skb(IWL_LINK_HDR_MAX * 2, GFP_ATOMIC);
998 if (!skb) {
999 IWL_ERR(priv, "alloc_skb failed\n");
1000 return;
1001 }
1002
1003 skb_reserve(skb, IWL_LINK_HDR_MAX);
1004 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
1005
1006 /* mac80211 currently doesn't support paged SKB. Convert it to
1007 * linear SKB for management frame and data frame requires
1008 * software decryption or software defragementation. */
1009 if (ieee80211_is_mgmt(fc) ||
1010 ieee80211_has_protected(fc) ||
1011 ieee80211_has_morefrags(fc) ||
1012 le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG ||
1013 (ieee80211_is_data_qos(fc) &&
1014 *ieee80211_get_qos_ctl(hdr) &
1015 IEEE80211_QOS_CONTROL_A_MSDU_PRESENT))
1016 ret = skb_linearize(skb);
1017 else
1018 ret = __pskb_pull_tail(skb, min_t(u16, IWL_LINK_HDR_MAX, len)) ?
1019 0 : -ENOMEM;
1020
1021 if (ret) {
1022 kfree_skb(skb);
1023 goto out;
1024 }
1025
1026 /*
1027 * XXX: We cannot touch the page and its virtual memory (hdr) after
1028 * here. It might have already been freed by the above skb change.
1029 */
1030
1031 iwl_update_stats(priv, false, fc, len);
1032 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
1033
1034 ieee80211_rx(priv->hw, skb);
1035 out:
1036 priv->alloc_rxb_page--;
1037 rxb->page = NULL;
1038}
1039
1040/* This is necessary only for a number of statistics, see the caller. */
1041static int iwl_is_network_packet(struct iwl_priv *priv,
1042 struct ieee80211_hdr *header)
1043{
1044 /* Filter incoming packets to determine if they are targeted toward
1045 * this network, discarding packets coming from ourselves */
1046 switch (priv->iw_mode) {
1047 case NL80211_IFTYPE_ADHOC: /* Header: Dest. | Source | BSSID */
1048 /* packets to our IBSS update information */
1049 return !compare_ether_addr(header->addr3, priv->bssid);
1050 case NL80211_IFTYPE_STATION: /* Header: Dest. | AP{BSSID} | Source */
1051 /* packets to our IBSS update information */
1052 return !compare_ether_addr(header->addr2, priv->bssid);
1053 default:
1054 return 1;
1055 }
1056}
1057
1058/* Called for REPLY_RX (legacy ABG frames), or
1059 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
1060void iwl_rx_reply_rx(struct iwl_priv *priv,
1061 struct iwl_rx_mem_buffer *rxb)
1062{
1063 struct ieee80211_hdr *header;
1064 struct ieee80211_rx_status rx_status;
1065 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1066 struct iwl_rx_phy_res *phy_res;
1067 __le32 rx_pkt_status;
1068 struct iwl4965_rx_mpdu_res_start *amsdu;
1069 u32 len;
1070 u32 ampdu_status;
1071 u32 rate_n_flags;
1072
1073 /**
1074 * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
1075 * REPLY_RX: physical layer info is in this buffer
1076 * REPLY_RX_MPDU_CMD: physical layer info was sent in separate
1077 * command and cached in priv->last_phy_res
1078 *
1079 * Here we set up local variables depending on which command is
1080 * received.
1081 */
1082 if (pkt->hdr.cmd == REPLY_RX) {
1083 phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
1084 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
1085 + phy_res->cfg_phy_cnt);
1086
1087 len = le16_to_cpu(phy_res->byte_count);
1088 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
1089 phy_res->cfg_phy_cnt + len);
1090 ampdu_status = le32_to_cpu(rx_pkt_status);
1091 } else {
1092 if (!priv->last_phy_res[0]) {
1093 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
1094 return;
1095 }
1096 phy_res = (struct iwl_rx_phy_res *)&priv->last_phy_res[1];
1097 amsdu = (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
1098 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
1099 len = le16_to_cpu(amsdu->byte_count);
1100 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
1101 ampdu_status = iwl_translate_rx_status(priv,
1102 le32_to_cpu(rx_pkt_status));
1103 }
1104
1105 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
1106 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
1107 phy_res->cfg_phy_cnt);
1108 return;
1109 }
1110
1111 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
1112 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
1113 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
1114 le32_to_cpu(rx_pkt_status));
1115 return;
1116 }
1117
1118 /* This will be used in several places later */
1119 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
1120
1121 /* rx_status carries information about the packet to mac80211 */
1122 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
1123 rx_status.freq =
1124 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel));
1125 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
1126 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
1127 rx_status.rate_idx =
1128 iwl_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
1129 rx_status.flag = 0;
1130
1131 /* TSF isn't reliable. In order to allow smooth user experience,
1132 * this W/A doesn't propagate it to the mac80211 */
1133 /*rx_status.flag |= RX_FLAG_TSFT;*/
1134
1135 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
1136
1137 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
1138 rx_status.signal = iwl_calc_rssi(priv, phy_res);
1139
1140 /* Meaningful noise values are available only from beacon statistics,
1141 * which are gathered only when associated, and indicate noise
1142 * only for the associated network channel ...
1143 * Ignore these noise values while scanning (other channels) */
1144 if (iwl_is_associated(priv) &&
1145 !test_bit(STATUS_SCANNING, &priv->status)) {
1146 rx_status.noise = priv->last_rx_noise;
1147 } else {
1148 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
1149 }
1150
1151 /* Reset beacon noise level if not associated. */
1152 if (!iwl_is_associated(priv))
1153 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
1154
1155#ifdef CONFIG_IWLWIFI_DEBUG
1156 /* Set "1" to report good data frames in groups of 100 */
1157 if (unlikely(iwl_get_debug_level(priv) & IWL_DL_RX))
1158 iwl_dbg_report_frame(priv, phy_res, len, header, 1);
1159#endif
1160 iwl_dbg_log_rx_data_frame(priv, len, header);
1161 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, noise %d, TSF %llu\n",
1162 rx_status.signal, rx_status.noise,
1163 (unsigned long long)rx_status.mactime);
1164
1165 /*
1166 * "antenna number"
1167 *
1168 * It seems that the antenna field in the phy flags value
1169 * is actually a bit field. This is undefined by radiotap,
1170 * it wants an actual antenna number but I always get "7"
1171 * for most legacy frames I receive indicating that the
1172 * same frame was received on all three RX chains.
1173 *
1174 * I think this field should be removed in favor of a
1175 * new 802.11n radiotap field "RX chains" that is defined
1176 * as a bitmask.
1177 */
1178 rx_status.antenna =
1179 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
1180 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
1181
1182 /* set the preamble flag if appropriate */
1183 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
1184 rx_status.flag |= RX_FLAG_SHORTPRE;
1185
1186 /* Set up the HT phy flags */
1187 if (rate_n_flags & RATE_MCS_HT_MSK)
1188 rx_status.flag |= RX_FLAG_HT;
1189 if (rate_n_flags & RATE_MCS_HT40_MSK)
1190 rx_status.flag |= RX_FLAG_40MHZ;
1191 if (rate_n_flags & RATE_MCS_SGI_MSK)
1192 rx_status.flag |= RX_FLAG_SHORT_GI;
1193
1194 if (iwl_is_network_packet(priv, header)) {
1195 priv->last_rx_rssi = rx_status.signal;
1196 priv->last_beacon_time = priv->ucode_beacon_time;
1197 priv->last_tsf = le64_to_cpu(phy_res->timestamp);
1198 }
1199
1200 iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1201 rxb, &rx_status);
1202}
1203EXPORT_SYMBOL(iwl_rx_reply_rx);
1204
1205/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
1206 * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
1207void iwl_rx_reply_rx_phy(struct iwl_priv *priv,
1208 struct iwl_rx_mem_buffer *rxb)
1209{
1210 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1211 priv->last_phy_res[0] = 1;
1212 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
1213 sizeof(struct iwl_rx_phy_res));
1214}
1215EXPORT_SYMBOL(iwl_rx_reply_rx_phy);
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-17 14:15:38 -0400