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drm/nouveau: consume the return of large GSP message
[drm/drm-misc.git] / drivers / net / wireless / intel / iwlegacy / 4965-mac.c
blob05c4af41bdb9609af75136de77c14bc718527833
1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3 *
4 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
5 *
6 * Portions of this file are derived from the ipw3945 project, as well
7 * as portions of the ieee80211 subsystem header files.
8 *
9 * Contact Information:
10 * Intel Linux Wireless <ilw@linux.intel.com>
11 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
12 *
13 *****************************************************************************/
14
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/pci.h>
21 #include <linux/slab.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/delay.h>
24 #include <linux/sched.h>
25 #include <linux/skbuff.h>
26 #include <linux/netdevice.h>
27 #include <linux/firmware.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_arp.h>
30 #include <linux/units.h>
31
32 #include <net/mac80211.h>
33
34 #include <asm/div64.h>
35
36 #define DRV_NAME "iwl4965"
37
38 #include "common.h"
39 #include "4965.h"
40
41 /******************************************************************************
42 *
43 * module boiler plate
44 *
45 ******************************************************************************/
46
47 /*
48 * module name, copyright, version, etc.
49 */
50 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux"
51
52 #ifdef CONFIG_IWLEGACY_DEBUG
53 #define VD "d"
54 #else
55 #define VD
56 #endif
57
58 #define DRV_VERSION IWLWIFI_VERSION VD
59
60 MODULE_DESCRIPTION(DRV_DESCRIPTION);
61 MODULE_VERSION(DRV_VERSION);
62 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
63 MODULE_LICENSE("GPL");
64 MODULE_ALIAS("iwl4965");
65
66 void
67 il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status)
68 {
69 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
70 IL_ERR("Tx flush command to flush out all frames\n");
71 if (!test_bit(S_EXIT_PENDING, &il->status))
72 queue_work(il->workqueue, &il->tx_flush);
73 }
74 }
75
76 /*
77 * EEPROM
78 */
79 struct il_mod_params il4965_mod_params = {
80 .restart_fw = 1,
81 /* the rest are 0 by default */
82 };
83
84 void
85 il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
86 {
87 unsigned long flags;
88 int i;
89 spin_lock_irqsave(&rxq->lock, flags);
90 INIT_LIST_HEAD(&rxq->rx_free);
91 INIT_LIST_HEAD(&rxq->rx_used);
92 /* Fill the rx_used queue with _all_ of the Rx buffers */
93 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
94 /* In the reset function, these buffers may have been allocated
95 * to an SKB, so we need to unmap and free potential storage */
96 if (rxq->pool[i].page != NULL) {
97 dma_unmap_page(&il->pci_dev->dev,
98 rxq->pool[i].page_dma,
99 PAGE_SIZE << il->hw_params.rx_page_order,
100 DMA_FROM_DEVICE);
101 __il_free_pages(il, rxq->pool[i].page);
102 rxq->pool[i].page = NULL;
103 }
104 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
105 }
106
107 for (i = 0; i < RX_QUEUE_SIZE; i++)
108 rxq->queue[i] = NULL;
109
110 /* Set us so that we have processed and used all buffers, but have
111 * not restocked the Rx queue with fresh buffers */
112 rxq->read = rxq->write = 0;
113 rxq->write_actual = 0;
114 rxq->free_count = 0;
115 spin_unlock_irqrestore(&rxq->lock, flags);
116 }
117
118 int
119 il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
120 {
121 u32 rb_size;
122 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
123 u32 rb_timeout = 0;
124
125 if (il->cfg->mod_params->amsdu_size_8K)
126 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
127 else
128 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
129
130 /* Stop Rx DMA */
131 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
132
133 /* Reset driver's Rx queue write idx */
134 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
135
136 /* Tell device where to find RBD circular buffer in DRAM */
137 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8));
138
139 /* Tell device where in DRAM to update its Rx status */
140 il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4);
141
142 /* Enable Rx DMA
143 * Direct rx interrupts to hosts
144 * Rx buffer size 4 or 8k
145 * RB timeout 0x10
146 * 256 RBDs
147 */
148 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG,
149 FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
150 FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
151 FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
152 rb_size |
153 (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) |
154 (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
155
156 /* Set interrupt coalescing timer to default (2048 usecs) */
157 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF);
158
159 return 0;
160 }
161
162 static void
163 il4965_set_pwr_vmain(struct il_priv *il)
164 {
165 /*
166 * (for documentation purposes)
167 * to set power to V_AUX, do:
168
169 if (pci_pme_capable(il->pci_dev, PCI_D3cold))
170 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
171 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
172 ~APMG_PS_CTRL_MSK_PWR_SRC);
173 */
174
175 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
176 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
177 ~APMG_PS_CTRL_MSK_PWR_SRC);
178 }
179
180 int
181 il4965_hw_nic_init(struct il_priv *il)
182 {
183 unsigned long flags;
184 struct il_rx_queue *rxq = &il->rxq;
185 int ret;
186
187 spin_lock_irqsave(&il->lock, flags);
188 il_apm_init(il);
189 /* Set interrupt coalescing calibration timer to default (512 usecs) */
190 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF);
191 spin_unlock_irqrestore(&il->lock, flags);
192
193 il4965_set_pwr_vmain(il);
194 il4965_nic_config(il);
195
196 /* Allocate the RX queue, or reset if it is already allocated */
197 if (!rxq->bd) {
198 ret = il_rx_queue_alloc(il);
199 if (ret) {
200 IL_ERR("Unable to initialize Rx queue\n");
201 return -ENOMEM;
202 }
203 } else
204 il4965_rx_queue_reset(il, rxq);
205
206 il4965_rx_replenish(il);
207
208 il4965_rx_init(il, rxq);
209
210 spin_lock_irqsave(&il->lock, flags);
211
212 rxq->need_update = 1;
213 il_rx_queue_update_write_ptr(il, rxq);
214
215 spin_unlock_irqrestore(&il->lock, flags);
216
217 /* Allocate or reset and init all Tx and Command queues */
218 if (!il->txq) {
219 ret = il4965_txq_ctx_alloc(il);
220 if (ret)
221 return ret;
222 } else
223 il4965_txq_ctx_reset(il);
224
225 set_bit(S_INIT, &il->status);
226
227 return 0;
228 }
229
230 /*
231 * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
232 */
233 static inline __le32
234 il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
235 {
236 return cpu_to_le32((u32) (dma_addr >> 8));
237 }
238
239 /*
240 * il4965_rx_queue_restock - refill RX queue from pre-allocated pool
241 *
242 * If there are slots in the RX queue that need to be restocked,
243 * and we have free pre-allocated buffers, fill the ranks as much
244 * as we can, pulling from rx_free.
245 *
246 * This moves the 'write' idx forward to catch up with 'processed', and
247 * also updates the memory address in the firmware to reference the new
248 * target buffer.
249 */
250 void
251 il4965_rx_queue_restock(struct il_priv *il)
252 {
253 struct il_rx_queue *rxq = &il->rxq;
254 struct list_head *element;
255 struct il_rx_buf *rxb;
256 unsigned long flags;
257
258 spin_lock_irqsave(&rxq->lock, flags);
259 while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
260 /* The overwritten rxb must be a used one */
261 rxb = rxq->queue[rxq->write];
262 BUG_ON(rxb && rxb->page);
263
264 /* Get next free Rx buffer, remove from free list */
265 element = rxq->rx_free.next;
266 rxb = list_entry(element, struct il_rx_buf, list);
267 list_del(element);
268
269 /* Point to Rx buffer via next RBD in circular buffer */
270 rxq->bd[rxq->write] =
271 il4965_dma_addr2rbd_ptr(il, rxb->page_dma);
272 rxq->queue[rxq->write] = rxb;
273 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
274 rxq->free_count--;
275 }
276 spin_unlock_irqrestore(&rxq->lock, flags);
277 /* If the pre-allocated buffer pool is dropping low, schedule to
278 * refill it */
279 if (rxq->free_count <= RX_LOW_WATERMARK)
280 queue_work(il->workqueue, &il->rx_replenish);
281
282 /* If we've added more space for the firmware to place data, tell it.
283 * Increment device's write pointer in multiples of 8. */
284 if (rxq->write_actual != (rxq->write & ~0x7)) {
285 spin_lock_irqsave(&rxq->lock, flags);
286 rxq->need_update = 1;
287 spin_unlock_irqrestore(&rxq->lock, flags);
288 il_rx_queue_update_write_ptr(il, rxq);
289 }
290 }
291
292 /*
293 * il4965_rx_replenish - Move all used packet from rx_used to rx_free
294 *
295 * When moving to rx_free an SKB is allocated for the slot.
296 *
297 * Also restock the Rx queue via il_rx_queue_restock.
298 * This is called as a scheduled work item (except for during initialization)
299 */
300 static void
301 il4965_rx_allocate(struct il_priv *il, gfp_t priority)
302 {
303 struct il_rx_queue *rxq = &il->rxq;
304 struct list_head *element;
305 struct il_rx_buf *rxb;
306 struct page *page;
307 dma_addr_t page_dma;
308 unsigned long flags;
309 gfp_t gfp_mask = priority;
310
311 while (1) {
312 spin_lock_irqsave(&rxq->lock, flags);
313 if (list_empty(&rxq->rx_used)) {
314 spin_unlock_irqrestore(&rxq->lock, flags);
315 return;
316 }
317 spin_unlock_irqrestore(&rxq->lock, flags);
318
319 if (rxq->free_count > RX_LOW_WATERMARK)
320 gfp_mask |= __GFP_NOWARN;
321
322 if (il->hw_params.rx_page_order > 0)
323 gfp_mask |= __GFP_COMP;
324
325 /* Alloc a new receive buffer */
326 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
327 if (!page) {
328 if (net_ratelimit())
329 D_INFO("alloc_pages failed, " "order: %d\n",
330 il->hw_params.rx_page_order);
331
332 if (rxq->free_count <= RX_LOW_WATERMARK &&
333 net_ratelimit())
334 IL_ERR("Failed to alloc_pages with %s. "
335 "Only %u free buffers remaining.\n",
336 priority ==
337 GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
338 rxq->free_count);
339 /* We don't reschedule replenish work here -- we will
340 * call the restock method and if it still needs
341 * more buffers it will schedule replenish */
342 return;
343 }
344
345 /* Get physical address of the RB */
346 page_dma = dma_map_page(&il->pci_dev->dev, page, 0,
347 PAGE_SIZE << il->hw_params.rx_page_order,
348 DMA_FROM_DEVICE);
349 if (unlikely(dma_mapping_error(&il->pci_dev->dev, page_dma))) {
350 __free_pages(page, il->hw_params.rx_page_order);
351 break;
352 }
353
354 spin_lock_irqsave(&rxq->lock, flags);
355
356 if (list_empty(&rxq->rx_used)) {
357 spin_unlock_irqrestore(&rxq->lock, flags);
358 dma_unmap_page(&il->pci_dev->dev, page_dma,
359 PAGE_SIZE << il->hw_params.rx_page_order,
360 DMA_FROM_DEVICE);
361 __free_pages(page, il->hw_params.rx_page_order);
362 return;
363 }
364
365 element = rxq->rx_used.next;
366 rxb = list_entry(element, struct il_rx_buf, list);
367 list_del(element);
368
369 BUG_ON(rxb->page);
370
371 rxb->page = page;
372 rxb->page_dma = page_dma;
373 list_add_tail(&rxb->list, &rxq->rx_free);
374 rxq->free_count++;
375 il->alloc_rxb_page++;
376
377 spin_unlock_irqrestore(&rxq->lock, flags);
378 }
379 }
380
381 void
382 il4965_rx_replenish(struct il_priv *il)
383 {
384 unsigned long flags;
385
386 il4965_rx_allocate(il, GFP_KERNEL);
387
388 spin_lock_irqsave(&il->lock, flags);
389 il4965_rx_queue_restock(il);
390 spin_unlock_irqrestore(&il->lock, flags);
391 }
392
393 void
394 il4965_rx_replenish_now(struct il_priv *il)
395 {
396 il4965_rx_allocate(il, GFP_ATOMIC);
397
398 il4965_rx_queue_restock(il);
399 }
400
401 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
402 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
403 * This free routine walks the list of POOL entries and if SKB is set to
404 * non NULL it is unmapped and freed
405 */
406 void
407 il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
408 {
409 int i;
410 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
411 if (rxq->pool[i].page != NULL) {
412 dma_unmap_page(&il->pci_dev->dev,
413 rxq->pool[i].page_dma,
414 PAGE_SIZE << il->hw_params.rx_page_order,
415 DMA_FROM_DEVICE);
416 __il_free_pages(il, rxq->pool[i].page);
417 rxq->pool[i].page = NULL;
418 }
419 }
420
421 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
422 rxq->bd_dma);
423 dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
424 rxq->rb_stts, rxq->rb_stts_dma);
425 rxq->bd = NULL;
426 rxq->rb_stts = NULL;
427 }
428
429 int
430 il4965_rxq_stop(struct il_priv *il)
431 {
432 int ret;
433
434 _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
435 ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG,
436 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
437 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
438 1000);
439 if (ret < 0)
440 IL_ERR("Can't stop Rx DMA.\n");
441
442 return 0;
443 }
444
445 int
446 il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band)
447 {
448 int idx = 0;
449 int band_offset = 0;
450
451 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
452 if (rate_n_flags & RATE_MCS_HT_MSK) {
453 idx = (rate_n_flags & 0xff);
454 return idx;
455 /* Legacy rate format, search for match in table */
456 } else {
457 if (band == NL80211_BAND_5GHZ)
458 band_offset = IL_FIRST_OFDM_RATE;
459 for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++)
460 if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
461 return idx - band_offset;
462 }
463
464 return -1;
465 }
466
467 static int
468 il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp)
469 {
470 /* data from PHY/DSP regarding signal strength, etc.,
471 * contents are always there, not configurable by host. */
472 struct il4965_rx_non_cfg_phy *ncphy =
473 (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
474 u32 agc =
475 (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >>
476 IL49_AGC_DB_POS;
477
478 u32 valid_antennae =
479 (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK)
480 >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
481 u8 max_rssi = 0;
482 u32 i;
483
484 /* Find max rssi among 3 possible receivers.
485 * These values are measured by the digital signal processor (DSP).
486 * They should stay fairly constant even as the signal strength varies,
487 * if the radio's automatic gain control (AGC) is working right.
488 * AGC value (see below) will provide the "interesting" info. */
489 for (i = 0; i < 3; i++)
490 if (valid_antennae & (1 << i))
491 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
492
493 D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
494 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
495 max_rssi, agc);
496
497 /* dBm = max_rssi dB - agc dB - constant.
498 * Higher AGC (higher radio gain) means lower signal. */
499 return max_rssi - agc - IL4965_RSSI_OFFSET;
500 }
501
502 static u32
503 il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in)
504 {
505 u32 decrypt_out = 0;
506
507 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
508 RX_RES_STATUS_STATION_FOUND)
509 decrypt_out |=
510 (RX_RES_STATUS_STATION_FOUND |
511 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
512
513 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
514
515 /* packet was not encrypted */
516 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
517 RX_RES_STATUS_SEC_TYPE_NONE)
518 return decrypt_out;
519
520 /* packet was encrypted with unknown alg */
521 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
522 RX_RES_STATUS_SEC_TYPE_ERR)
523 return decrypt_out;
524
525 /* decryption was not done in HW */
526 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
527 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
528 return decrypt_out;
529
530 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
531
532 case RX_RES_STATUS_SEC_TYPE_CCMP:
533 /* alg is CCM: check MIC only */
534 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
535 /* Bad MIC */
536 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
537 else
538 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
539
540 break;
541
542 case RX_RES_STATUS_SEC_TYPE_TKIP:
543 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
544 /* Bad TTAK */
545 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
546 break;
547 }
548 fallthrough; /* if TTAK OK */
549 default:
550 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
551 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
552 else
553 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
554 break;
555 }
556
557 D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out);
558
559 return decrypt_out;
560 }
561
562 #define SMALL_PACKET_SIZE 256
563
564 static void
565 il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr,
566 u32 len, u32 ampdu_status, struct il_rx_buf *rxb,
567 struct ieee80211_rx_status *stats)
568 {
569 struct sk_buff *skb;
570 __le16 fc = hdr->frame_control;
571
572 /* We only process data packets if the interface is open */
573 if (unlikely(!il->is_open)) {
574 D_DROP("Dropping packet while interface is not open.\n");
575 return;
576 }
577
578 if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) {
579 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
580 D_INFO("Woke queues - frame received on passive channel\n");
581 }
582
583 /* In case of HW accelerated crypto and bad decryption, drop */
584 if (!il->cfg->mod_params->sw_crypto &&
585 il_set_decrypted_flag(il, hdr, ampdu_status, stats))
586 return;
587
588 skb = dev_alloc_skb(SMALL_PACKET_SIZE);
589 if (!skb) {
590 IL_ERR("dev_alloc_skb failed\n");
591 return;
592 }
593
594 if (len <= SMALL_PACKET_SIZE) {
595 skb_put_data(skb, hdr, len);
596 } else {
597 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb),
598 len, PAGE_SIZE << il->hw_params.rx_page_order);
599 il->alloc_rxb_page--;
600 rxb->page = NULL;
601 }
602
603 il_update_stats(il, false, fc, len);
604 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
605
606 ieee80211_rx(il->hw, skb);
607 }
608
609 /* Called for N_RX (legacy ABG frames), or
610 * N_RX_MPDU (HT high-throughput N frames). */
611 static void
612 il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb)
613 {
614 struct ieee80211_hdr *header;
615 struct ieee80211_rx_status rx_status = {};
616 struct il_rx_pkt *pkt = rxb_addr(rxb);
617 struct il_rx_phy_res *phy_res;
618 __le32 rx_pkt_status;
619 struct il_rx_mpdu_res_start *amsdu;
620 u32 len;
621 u32 ampdu_status;
622 u32 rate_n_flags;
623
624 /**
625 * N_RX and N_RX_MPDU are handled differently.
626 * N_RX: physical layer info is in this buffer
627 * N_RX_MPDU: physical layer info was sent in separate
628 * command and cached in il->last_phy_res
629 *
630 * Here we set up local variables depending on which command is
631 * received.
632 */
633 if (pkt->hdr.cmd == N_RX) {
634 phy_res = (struct il_rx_phy_res *)pkt->u.raw;
635 header =
636 (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) +
637 phy_res->cfg_phy_cnt);
638
639 len = le16_to_cpu(phy_res->byte_count);
640 rx_pkt_status =
641 *(__le32 *) (pkt->u.raw + sizeof(*phy_res) +
642 phy_res->cfg_phy_cnt + len);
643 ampdu_status = le32_to_cpu(rx_pkt_status);
644 } else {
645 if (!il->_4965.last_phy_res_valid) {
646 IL_ERR("MPDU frame without cached PHY data\n");
647 return;
648 }
649 phy_res = &il->_4965.last_phy_res;
650 amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw;
651 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
652 len = le16_to_cpu(amsdu->byte_count);
653 rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len);
654 ampdu_status =
655 il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status));
656 }
657
658 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
659 D_DROP("dsp size out of range [0,20]: %d\n",
660 phy_res->cfg_phy_cnt);
661 return;
662 }
663
664 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
665 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
666 D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status));
667 return;
668 }
669
670 /* This will be used in several places later */
671 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
672
673 /* rx_status carries information about the packet to mac80211 */
674 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
675 rx_status.band =
676 (phy_res->
677 phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ :
678 NL80211_BAND_5GHZ;
679 rx_status.freq =
680 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
681 rx_status.band);
682 rx_status.rate_idx =
683 il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
684 rx_status.flag = 0;
685
686 /* TSF isn't reliable. In order to allow smooth user experience,
687 * this W/A doesn't propagate it to the mac80211 */
688 /*rx_status.flag |= RX_FLAG_MACTIME_START; */
689
690 il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
691
692 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
693 rx_status.signal = il4965_calc_rssi(il, phy_res);
694
695 D_STATS("Rssi %d, TSF %llu\n", rx_status.signal,
696 (unsigned long long)rx_status.mactime);
697
698 /*
699 * "antenna number"
700 *
701 * It seems that the antenna field in the phy flags value
702 * is actually a bit field. This is undefined by radiotap,
703 * it wants an actual antenna number but I always get "7"
704 * for most legacy frames I receive indicating that the
705 * same frame was received on all three RX chains.
706 *
707 * I think this field should be removed in favor of a
708 * new 802.11n radiotap field "RX chains" that is defined
709 * as a bitmask.
710 */
711 rx_status.antenna =
712 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >>
713 RX_RES_PHY_FLAGS_ANTENNA_POS;
714
715 /* set the preamble flag if appropriate */
716 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
717 rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE;
718
719 /* Set up the HT phy flags */
720 if (rate_n_flags & RATE_MCS_HT_MSK)
721 rx_status.encoding = RX_ENC_HT;
722 if (rate_n_flags & RATE_MCS_HT40_MSK)
723 rx_status.bw = RATE_INFO_BW_40;
724 else
725 rx_status.bw = RATE_INFO_BW_20;
726 if (rate_n_flags & RATE_MCS_SGI_MSK)
727 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
728
729 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
730 /* We know which subframes of an A-MPDU belong
731 * together since we get a single PHY response
732 * from the firmware for all of them.
733 */
734
735 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
736 rx_status.ampdu_reference = il->_4965.ampdu_ref;
737 }
738
739 il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb,
740 &rx_status);
741 }
742
743 /* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY).
744 * This will be used later in il_hdl_rx() for N_RX_MPDU. */
745 static void
746 il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb)
747 {
748 struct il_rx_pkt *pkt = rxb_addr(rxb);
749 il->_4965.last_phy_res_valid = true;
750 il->_4965.ampdu_ref++;
751 memcpy(&il->_4965.last_phy_res, pkt->u.raw,
752 sizeof(struct il_rx_phy_res));
753 }
754
755 static int
756 il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif,
757 enum nl80211_band band, u8 is_active,
758 u8 n_probes, struct il_scan_channel *scan_ch)
759 {
760 struct ieee80211_channel *chan;
761 const struct ieee80211_supported_band *sband;
762 const struct il_channel_info *ch_info;
763 u16 passive_dwell = 0;
764 u16 active_dwell = 0;
765 int added, i;
766 u16 channel;
767
768 sband = il_get_hw_mode(il, band);
769 if (!sband)
770 return 0;
771
772 active_dwell = il_get_active_dwell_time(il, band, n_probes);
773 passive_dwell = il_get_passive_dwell_time(il, band, vif);
774
775 if (passive_dwell <= active_dwell)
776 passive_dwell = active_dwell + 1;
777
778 for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
779 chan = il->scan_request->channels[i];
780
781 if (chan->band != band)
782 continue;
783
784 channel = chan->hw_value;
785 scan_ch->channel = cpu_to_le16(channel);
786
787 ch_info = il_get_channel_info(il, band, channel);
788 if (!il_is_channel_valid(ch_info)) {
789 D_SCAN("Channel %d is INVALID for this band.\n",
790 channel);
791 continue;
792 }
793
794 if (!is_active || il_is_channel_passive(ch_info) ||
795 (chan->flags & IEEE80211_CHAN_NO_IR))
796 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
797 else
798 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
799
800 if (n_probes)
801 scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes);
802
803 scan_ch->active_dwell = cpu_to_le16(active_dwell);
804 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
805
806 /* Set txpower levels to defaults */
807 scan_ch->dsp_atten = 110;
808
809 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
810 * power level:
811 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
812 */
813 if (band == NL80211_BAND_5GHZ)
814 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
815 else
816 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
817
818 D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel,
819 le32_to_cpu(scan_ch->type),
820 (scan_ch->
821 type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE",
822 (scan_ch->
823 type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell :
824 passive_dwell);
825
826 scan_ch++;
827 added++;
828 }
829
830 D_SCAN("total channels to scan %d\n", added);
831 return added;
832 }
833
834 static void
835 il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid)
836 {
837 int i;
838 u8 ind = *ant;
839
840 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
841 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
842 if (valid & BIT(ind)) {
843 *ant = ind;
844 return;
845 }
846 }
847 }
848
849 int
850 il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
851 {
852 struct il_host_cmd cmd = {
853 .id = C_SCAN,
854 .len = sizeof(struct il_scan_cmd),
855 .flags = CMD_SIZE_HUGE,
856 };
857 struct il_scan_cmd *scan;
858 u32 rate_flags = 0;
859 u16 cmd_len;
860 u16 rx_chain = 0;
861 enum nl80211_band band;
862 u8 n_probes = 0;
863 u8 rx_ant = il->hw_params.valid_rx_ant;
864 u8 rate;
865 bool is_active = false;
866 int chan_mod;
867 u8 active_chains;
868 u8 scan_tx_antennas = il->hw_params.valid_tx_ant;
869 int ret;
870
871 lockdep_assert_held(&il->mutex);
872
873 if (!il->scan_cmd) {
874 il->scan_cmd =
875 kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE,
876 GFP_KERNEL);
877 if (!il->scan_cmd) {
878 D_SCAN("fail to allocate memory for scan\n");
879 return -ENOMEM;
880 }
881 }
882 scan = il->scan_cmd;
883 memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE);
884
885 scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
886 scan->quiet_time = IL_ACTIVE_QUIET_TIME;
887
888 if (il_is_any_associated(il)) {
889 u16 interval;
890 u32 extra;
891 u32 suspend_time = 100;
892 u32 scan_suspend_time = 100;
893
894 D_INFO("Scanning while associated...\n");
895 interval = vif->bss_conf.beacon_int;
896
897 scan->suspend_time = 0;
898 scan->max_out_time = cpu_to_le32(200 * 1024);
899 if (!interval)
900 interval = suspend_time;
901
902 extra = (suspend_time / interval) << 22;
903 scan_suspend_time =
904 (extra | ((suspend_time % interval) * 1024));
905 scan->suspend_time = cpu_to_le32(scan_suspend_time);
906 D_SCAN("suspend_time 0x%X beacon interval %d\n",
907 scan_suspend_time, interval);
908 }
909
910 if (il->scan_request->n_ssids) {
911 int i, p = 0;
912 D_SCAN("Kicking off active scan\n");
913 for (i = 0; i < il->scan_request->n_ssids; i++) {
914 /* always does wildcard anyway */
915 if (!il->scan_request->ssids[i].ssid_len)
916 continue;
917 scan->direct_scan[p].id = WLAN_EID_SSID;
918 scan->direct_scan[p].len =
919 il->scan_request->ssids[i].ssid_len;
920 memcpy(scan->direct_scan[p].ssid,
921 il->scan_request->ssids[i].ssid,
922 il->scan_request->ssids[i].ssid_len);
923 n_probes++;
924 p++;
925 }
926 is_active = true;
927 } else
928 D_SCAN("Start passive scan.\n");
929
930 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
931 scan->tx_cmd.sta_id = il->hw_params.bcast_id;
932 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
933
934 switch (il->scan_band) {
935 case NL80211_BAND_2GHZ:
936 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
937 chan_mod =
938 le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >>
939 RXON_FLG_CHANNEL_MODE_POS;
940 if (chan_mod == CHANNEL_MODE_PURE_40) {
941 rate = RATE_6M_PLCP;
942 } else {
943 rate = RATE_1M_PLCP;
944 rate_flags = RATE_MCS_CCK_MSK;
945 }
946 break;
947 case NL80211_BAND_5GHZ:
948 rate = RATE_6M_PLCP;
949 break;
950 default:
951 IL_WARN("Invalid scan band\n");
952 return -EIO;
953 }
954
955 /*
956 * If active scanning is requested but a certain channel is
957 * marked passive, we can do active scanning if we detect
958 * transmissions.
959 *
960 * There is an issue with some firmware versions that triggers
961 * a sysassert on a "good CRC threshold" of zero (== disabled),
962 * on a radar channel even though this means that we should NOT
963 * send probes.
964 *
965 * The "good CRC threshold" is the number of frames that we
966 * need to receive during our dwell time on a channel before
967 * sending out probes -- setting this to a huge value will
968 * mean we never reach it, but at the same time work around
969 * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER
970 * here instead of IL_GOOD_CRC_TH_DISABLED.
971 */
972 scan->good_CRC_th =
973 is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
974
975 band = il->scan_band;
976
977 if (il->cfg->scan_rx_antennas[band])
978 rx_ant = il->cfg->scan_rx_antennas[band];
979
980 il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas);
981 rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS;
982 scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags);
983
984 /* In power save mode use one chain, otherwise use all chains */
985 if (test_bit(S_POWER_PMI, &il->status)) {
986 /* rx_ant has been set to all valid chains previously */
987 active_chains =
988 rx_ant & ((u8) (il->chain_noise_data.active_chains));
989 if (!active_chains)
990 active_chains = rx_ant;
991
992 D_SCAN("chain_noise_data.active_chains: %u\n",
993 il->chain_noise_data.active_chains);
994
995 rx_ant = il4965_first_antenna(active_chains);
996 }
997
998 /* MIMO is not used here, but value is required */
999 rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
1000 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1001 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
1002 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1003 scan->rx_chain = cpu_to_le16(rx_chain);
1004
1005 cmd_len =
1006 il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
1007 vif->addr, il->scan_request->ie,
1008 il->scan_request->ie_len,
1009 IL_MAX_SCAN_SIZE - sizeof(*scan));
1010 scan->tx_cmd.len = cpu_to_le16(cmd_len);
1011
1012 scan->filter_flags |=
1013 (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK);
1014
1015 scan->channel_count =
1016 il4965_get_channels_for_scan(il, vif, band, is_active, n_probes,
1017 (void *)&scan->data[cmd_len]);
1018 if (scan->channel_count == 0) {
1019 D_SCAN("channel count %d\n", scan->channel_count);
1020 return -EIO;
1021 }
1022
1023 cmd.len +=
1024 le16_to_cpu(scan->tx_cmd.len) +
1025 scan->channel_count * sizeof(struct il_scan_channel);
1026 cmd.data = scan;
1027 scan->len = cpu_to_le16(cmd.len);
1028
1029 set_bit(S_SCAN_HW, &il->status);
1030
1031 ret = il_send_cmd_sync(il, &cmd);
1032 if (ret)
1033 clear_bit(S_SCAN_HW, &il->status);
1034
1035 return ret;
1036 }
1037
1038 int
1039 il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif,
1040 bool add)
1041 {
1042 struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
1043
1044 if (add)
1045 return il4965_add_bssid_station(il, vif->bss_conf.bssid,
1046 &vif_priv->ibss_bssid_sta_id);
1047 return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
1048 vif->bss_conf.bssid);
1049 }
1050
1051 void
1052 il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed)
1053 {
1054 lockdep_assert_held(&il->sta_lock);
1055
1056 if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1057 il->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1058 else {
1059 D_TX("free more than tfds_in_queue (%u:%d)\n",
1060 il->stations[sta_id].tid[tid].tfds_in_queue, freed);
1061 il->stations[sta_id].tid[tid].tfds_in_queue = 0;
1062 }
1063 }
1064
1065 #define IL_TX_QUEUE_MSK 0xfffff
1066
1067 static bool
1068 il4965_is_single_rx_stream(struct il_priv *il)
1069 {
1070 return il->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1071 il->current_ht_config.single_chain_sufficient;
1072 }
1073
1074 #define IL_NUM_RX_CHAINS_MULTIPLE 3
1075 #define IL_NUM_RX_CHAINS_SINGLE 2
1076 #define IL_NUM_IDLE_CHAINS_DUAL 2
1077 #define IL_NUM_IDLE_CHAINS_SINGLE 1
1078
1079 /*
1080 * Determine how many receiver/antenna chains to use.
1081 *
1082 * More provides better reception via diversity. Fewer saves power
1083 * at the expense of throughput, but only when not in powersave to
1084 * start with.
1085 *
1086 * MIMO (dual stream) requires at least 2, but works better with 3.
1087 * This does not determine *which* chains to use, just how many.
1088 */
1089 static int
1090 il4965_get_active_rx_chain_count(struct il_priv *il)
1091 {
1092 /* # of Rx chains to use when expecting MIMO. */
1093 if (il4965_is_single_rx_stream(il))
1094 return IL_NUM_RX_CHAINS_SINGLE;
1095 else
1096 return IL_NUM_RX_CHAINS_MULTIPLE;
1097 }
1098
1099 /*
1100 * When we are in power saving mode, unless device support spatial
1101 * multiplexing power save, use the active count for rx chain count.
1102 */
1103 static int
1104 il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt)
1105 {
1106 /* # Rx chains when idling, depending on SMPS mode */
1107 switch (il->current_ht_config.smps) {
1108 case IEEE80211_SMPS_STATIC:
1109 case IEEE80211_SMPS_DYNAMIC:
1110 return IL_NUM_IDLE_CHAINS_SINGLE;
1111 case IEEE80211_SMPS_OFF:
1112 return active_cnt;
1113 default:
1114 WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps);
1115 return active_cnt;
1116 }
1117 }
1118
1119 /* up to 4 chains */
1120 static u8
1121 il4965_count_chain_bitmap(u32 chain_bitmap)
1122 {
1123 u8 res;
1124 res = (chain_bitmap & BIT(0)) >> 0;
1125 res += (chain_bitmap & BIT(1)) >> 1;
1126 res += (chain_bitmap & BIT(2)) >> 2;
1127 res += (chain_bitmap & BIT(3)) >> 3;
1128 return res;
1129 }
1130
1131 /*
1132 * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1133 *
1134 * Selects how many and which Rx receivers/antennas/chains to use.
1135 * This should not be used for scan command ... it puts data in wrong place.
1136 */
1137 void
1138 il4965_set_rxon_chain(struct il_priv *il)
1139 {
1140 bool is_single = il4965_is_single_rx_stream(il);
1141 bool is_cam = !test_bit(S_POWER_PMI, &il->status);
1142 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1143 u32 active_chains;
1144 u16 rx_chain;
1145
1146 /* Tell uCode which antennas are actually connected.
1147 * Before first association, we assume all antennas are connected.
1148 * Just after first association, il4965_chain_noise_calibration()
1149 * checks which antennas actually *are* connected. */
1150 if (il->chain_noise_data.active_chains)
1151 active_chains = il->chain_noise_data.active_chains;
1152 else
1153 active_chains = il->hw_params.valid_rx_ant;
1154
1155 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1156
1157 /* How many receivers should we use? */
1158 active_rx_cnt = il4965_get_active_rx_chain_count(il);
1159 idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt);
1160
1161 /* correct rx chain count according hw settings
1162 * and chain noise calibration
1163 */
1164 valid_rx_cnt = il4965_count_chain_bitmap(active_chains);
1165 if (valid_rx_cnt < active_rx_cnt)
1166 active_rx_cnt = valid_rx_cnt;
1167
1168 if (valid_rx_cnt < idle_rx_cnt)
1169 idle_rx_cnt = valid_rx_cnt;
1170
1171 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1172 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
1173
1174 il->staging.rx_chain = cpu_to_le16(rx_chain);
1175
1176 if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam)
1177 il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1178 else
1179 il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1180
1181 D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain,
1182 active_rx_cnt, idle_rx_cnt);
1183
1184 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1185 active_rx_cnt < idle_rx_cnt);
1186 }
1187
1188 static const char *
1189 il4965_get_fh_string(int cmd)
1190 {
1191 switch (cmd) {
1192 IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG);
1193 IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG);
1194 IL_CMD(FH49_RSCSR_CHNL0_WPTR);
1195 IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG);
1196 IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG);
1197 IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG);
1198 IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1199 IL_CMD(FH49_TSSR_TX_STATUS_REG);
1200 IL_CMD(FH49_TSSR_TX_ERROR_REG);
1201 default:
1202 return "UNKNOWN";
1203 }
1204 }
1205
1206 int
1207 il4965_dump_fh(struct il_priv *il, char **buf, bool display)
1208 {
1209 int i;
1210 #ifdef CONFIG_IWLEGACY_DEBUG
1211 int pos = 0;
1212 size_t bufsz = 0;
1213 #endif
1214 static const u32 fh_tbl[] = {
1215 FH49_RSCSR_CHNL0_STTS_WPTR_REG,
1216 FH49_RSCSR_CHNL0_RBDCB_BASE_REG,
1217 FH49_RSCSR_CHNL0_WPTR,
1218 FH49_MEM_RCSR_CHNL0_CONFIG_REG,
1219 FH49_MEM_RSSR_SHARED_CTRL_REG,
1220 FH49_MEM_RSSR_RX_STATUS_REG,
1221 FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1222 FH49_TSSR_TX_STATUS_REG,
1223 FH49_TSSR_TX_ERROR_REG
1224 };
1225 #ifdef CONFIG_IWLEGACY_DEBUG
1226 if (display) {
1227 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1228 *buf = kmalloc(bufsz, GFP_KERNEL);
1229 if (!*buf)
1230 return -ENOMEM;
1231 pos +=
1232 scnprintf(*buf + pos, bufsz - pos, "FH register values:\n");
1233 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1234 pos +=
1235 scnprintf(*buf + pos, bufsz - pos,
1236 " %34s: 0X%08x\n",
1237 il4965_get_fh_string(fh_tbl[i]),
1238 il_rd(il, fh_tbl[i]));
1239 }
1240 return pos;
1241 }
1242 #endif
1243 IL_ERR("FH register values:\n");
1244 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1245 IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]),
1246 il_rd(il, fh_tbl[i]));
1247 }
1248 return 0;
1249 }
1250
1251 static void
1252 il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb)
1253 {
1254 struct il_rx_pkt *pkt = rxb_addr(rxb);
1255 struct il_missed_beacon_notif *missed_beacon;
1256
1257 missed_beacon = &pkt->u.missed_beacon;
1258 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
1259 il->missed_beacon_threshold) {
1260 D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
1261 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
1262 le32_to_cpu(missed_beacon->total_missed_becons),
1263 le32_to_cpu(missed_beacon->num_recvd_beacons),
1264 le32_to_cpu(missed_beacon->num_expected_beacons));
1265 if (!test_bit(S_SCANNING, &il->status))
1266 il4965_init_sensitivity(il);
1267 }
1268 }
1269
1270 /* Calculate noise level, based on measurements during network silence just
1271 * before arriving beacon. This measurement can be done only if we know
1272 * exactly when to expect beacons, therefore only when we're associated. */
1273 static void
1274 il4965_rx_calc_noise(struct il_priv *il)
1275 {
1276 struct stats_rx_non_phy *rx_info;
1277 int num_active_rx = 0;
1278 int total_silence = 0;
1279 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
1280 int last_rx_noise;
1281
1282 rx_info = &(il->_4965.stats.rx.general);
1283 bcn_silence_a =
1284 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
1285 bcn_silence_b =
1286 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
1287 bcn_silence_c =
1288 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
1289
1290 if (bcn_silence_a) {
1291 total_silence += bcn_silence_a;
1292 num_active_rx++;
1293 }
1294 if (bcn_silence_b) {
1295 total_silence += bcn_silence_b;
1296 num_active_rx++;
1297 }
1298 if (bcn_silence_c) {
1299 total_silence += bcn_silence_c;
1300 num_active_rx++;
1301 }
1302
1303 /* Average among active antennas */
1304 if (num_active_rx)
1305 last_rx_noise = (total_silence / num_active_rx) - 107;
1306 else
1307 last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE;
1308
1309 D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a,
1310 bcn_silence_b, bcn_silence_c, last_rx_noise);
1311 }
1312
1313 #ifdef CONFIG_IWLEGACY_DEBUGFS
1314 /*
1315 * based on the assumption of all stats counter are in DWORD
1316 * FIXME: This function is for debugging, do not deal with
1317 * the case of counters roll-over.
1318 */
1319 static void
1320 il4965_accumulative_stats(struct il_priv *il, __le32 * stats)
1321 {
1322 int i, size;
1323 __le32 *prev_stats;
1324 u32 *accum_stats;
1325 u32 *delta, *max_delta;
1326 struct stats_general_common *general, *accum_general;
1327
1328 prev_stats = (__le32 *) &il->_4965.stats;
1329 accum_stats = (u32 *) &il->_4965.accum_stats;
1330 size = sizeof(struct il_notif_stats);
1331 general = &il->_4965.stats.general.common;
1332 accum_general = &il->_4965.accum_stats.general.common;
1333 delta = (u32 *) &il->_4965.delta_stats;
1334 max_delta = (u32 *) &il->_4965.max_delta;
1335
1336 for (i = sizeof(__le32); i < size;
1337 i +=
1338 sizeof(__le32), stats++, prev_stats++, delta++, max_delta++,
1339 accum_stats++) {
1340 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
1341 *delta =
1342 (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats));
1343 *accum_stats += *delta;
1344 if (*delta > *max_delta)
1345 *max_delta = *delta;
1346 }
1347 }
1348
1349 /* reset accumulative stats for "no-counter" type stats */
1350 accum_general->temperature = general->temperature;
1351 accum_general->ttl_timestamp = general->ttl_timestamp;
1352 }
1353 #endif
1354
1355 static void
1356 il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb)
1357 {
1358 const int recalib_seconds = 60;
1359 bool change;
1360 struct il_rx_pkt *pkt = rxb_addr(rxb);
1361
1362 D_RX("Statistics notification received (%d vs %d).\n",
1363 (int)sizeof(struct il_notif_stats),
1364 le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK);
1365
1366 change =
1367 ((il->_4965.stats.general.common.temperature !=
1368 pkt->u.stats.general.common.temperature) ||
1369 ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) !=
1370 (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK)));
1371 #ifdef CONFIG_IWLEGACY_DEBUGFS
1372 il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats);
1373 #endif
1374
1375 /* TODO: reading some of stats is unneeded */
1376 memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats));
1377
1378 set_bit(S_STATS, &il->status);
1379
1380 /*
1381 * Reschedule the stats timer to occur in recalib_seconds to ensure
1382 * we get a thermal update even if the uCode doesn't give us one
1383 */
1384 mod_timer(&il->stats_periodic,
1385 jiffies + msecs_to_jiffies(recalib_seconds * 1000));
1386
1387 if (unlikely(!test_bit(S_SCANNING, &il->status)) &&
1388 (pkt->hdr.cmd == N_STATS)) {
1389 il4965_rx_calc_noise(il);
1390 queue_work(il->workqueue, &il->run_time_calib_work);
1391 }
1392
1393 if (change)
1394 il4965_temperature_calib(il);
1395 }
1396
1397 static void
1398 il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb)
1399 {
1400 struct il_rx_pkt *pkt = rxb_addr(rxb);
1401
1402 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) {
1403 #ifdef CONFIG_IWLEGACY_DEBUGFS
1404 memset(&il->_4965.accum_stats, 0,
1405 sizeof(struct il_notif_stats));
1406 memset(&il->_4965.delta_stats, 0,
1407 sizeof(struct il_notif_stats));
1408 memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats));
1409 #endif
1410 D_RX("Statistics have been cleared\n");
1411 }
1412 il4965_hdl_stats(il, rxb);
1413 }
1414
1415
1416 /*
1417 * mac80211 queues, ACs, hardware queues, FIFOs.
1418 *
1419 * Cf. https://wireless.wiki.kernel.org/en/developers/Documentation/mac80211/queues
1420 *
1421 * Mac80211 uses the following numbers, which we get as from it
1422 * by way of skb_get_queue_mapping(skb):
1423 *
1424 * VO 0
1425 * VI 1
1426 * BE 2
1427 * BK 3
1428 *
1429 *
1430 * Regular (not A-MPDU) frames are put into hardware queues corresponding
1431 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
1432 * own queue per aggregation session (RA/TID combination), such queues are
1433 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
1434 * order to map frames to the right queue, we also need an AC->hw queue
1435 * mapping. This is implemented here.
1436 *
1437 * Due to the way hw queues are set up (by the hw specific modules like
1438 * 4965.c), the AC->hw queue mapping is the identity
1439 * mapping.
1440 */
1441
1442 static const u8 tid_to_ac[] = {
1443 IEEE80211_AC_BE,
1444 IEEE80211_AC_BK,
1445 IEEE80211_AC_BK,
1446 IEEE80211_AC_BE,
1447 IEEE80211_AC_VI,
1448 IEEE80211_AC_VI,
1449 IEEE80211_AC_VO,
1450 IEEE80211_AC_VO
1451 };
1452
1453 static inline int
1454 il4965_get_ac_from_tid(u16 tid)
1455 {
1456 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1457 return tid_to_ac[tid];
1458
1459 /* no support for TIDs 8-15 yet */
1460 return -EINVAL;
1461 }
1462
1463 static inline int
1464 il4965_get_fifo_from_tid(u16 tid)
1465 {
1466 static const u8 ac_to_fifo[] = {
1467 IL_TX_FIFO_VO,
1468 IL_TX_FIFO_VI,
1469 IL_TX_FIFO_BE,
1470 IL_TX_FIFO_BK,
1471 };
1472
1473 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1474 return ac_to_fifo[tid_to_ac[tid]];
1475
1476 /* no support for TIDs 8-15 yet */
1477 return -EINVAL;
1478 }
1479
1480 /*
1481 * handle build C_TX command notification.
1482 */
1483 static void
1484 il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb,
1485 struct il_tx_cmd *tx_cmd,
1486 struct ieee80211_tx_info *info,
1487 struct ieee80211_hdr *hdr, u8 std_id)
1488 {
1489 __le16 fc = hdr->frame_control;
1490 __le32 tx_flags = tx_cmd->tx_flags;
1491
1492 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1493 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
1494 tx_flags |= TX_CMD_FLG_ACK_MSK;
1495 if (ieee80211_is_mgmt(fc))
1496 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1497 if (ieee80211_is_probe_resp(fc) &&
1498 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1499 tx_flags |= TX_CMD_FLG_TSF_MSK;
1500 } else {
1501 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1502 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1503 }
1504
1505 if (ieee80211_is_back_req(fc))
1506 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1507
1508 tx_cmd->sta_id = std_id;
1509 if (ieee80211_has_morefrags(fc))
1510 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1511
1512 if (ieee80211_is_data_qos(fc)) {
1513 u8 *qc = ieee80211_get_qos_ctl(hdr);
1514 tx_cmd->tid_tspec = qc[0] & 0xf;
1515 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1516 } else {
1517 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1518 }
1519
1520 il_tx_cmd_protection(il, info, fc, &tx_flags);
1521
1522 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1523 if (ieee80211_is_mgmt(fc)) {
1524 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
1525 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
1526 else
1527 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
1528 } else {
1529 tx_cmd->timeout.pm_frame_timeout = 0;
1530 }
1531
1532 tx_cmd->driver_txop = 0;
1533 tx_cmd->tx_flags = tx_flags;
1534 tx_cmd->next_frame_len = 0;
1535 }
1536
1537 static void
1538 il4965_tx_cmd_build_rate(struct il_priv *il,
1539 struct il_tx_cmd *tx_cmd,
1540 struct ieee80211_tx_info *info,
1541 struct ieee80211_sta *sta,
1542 __le16 fc)
1543 {
1544 const u8 rts_retry_limit = 60;
1545 u32 rate_flags;
1546 int rate_idx;
1547 u8 data_retry_limit;
1548 u8 rate_plcp;
1549
1550 /* Set retry limit on DATA packets and Probe Responses */
1551 if (ieee80211_is_probe_resp(fc))
1552 data_retry_limit = 3;
1553 else
1554 data_retry_limit = IL4965_DEFAULT_TX_RETRY;
1555 tx_cmd->data_retry_limit = data_retry_limit;
1556 /* Set retry limit on RTS packets */
1557 tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit);
1558
1559 /* DATA packets will use the uCode station table for rate/antenna
1560 * selection */
1561 if (ieee80211_is_data(fc)) {
1562 tx_cmd->initial_rate_idx = 0;
1563 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
1564 return;
1565 }
1566
1567 /**
1568 * If the current TX rate stored in mac80211 has the MCS bit set, it's
1569 * not really a TX rate. Thus, we use the lowest supported rate for
1570 * this band. Also use the lowest supported rate if the stored rate
1571 * idx is invalid.
1572 */
1573 rate_idx = info->control.rates[0].idx;
1574 if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0
1575 || rate_idx > RATE_COUNT_LEGACY)
1576 rate_idx = rate_lowest_index(&il->bands[info->band], sta);
1577 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
1578 if (info->band == NL80211_BAND_5GHZ)
1579 rate_idx += IL_FIRST_OFDM_RATE;
1580 /* Get PLCP rate for tx_cmd->rate_n_flags */
1581 rate_plcp = il_rates[rate_idx].plcp;
1582 /* Zero out flags for this packet */
1583 rate_flags = 0;
1584
1585 /* Set CCK flag as needed */
1586 if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE)
1587 rate_flags |= RATE_MCS_CCK_MSK;
1588
1589 /* Set up antennas */
1590 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
1591 rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
1592
1593 /* Set the rate in the TX cmd */
1594 tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags);
1595 }
1596
1597 static void
1598 il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
1599 struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag,
1600 int sta_id)
1601 {
1602 struct ieee80211_key_conf *keyconf = info->control.hw_key;
1603
1604 switch (keyconf->cipher) {
1605 case WLAN_CIPHER_SUITE_CCMP:
1606 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
1607 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
1608 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1609 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1610 D_TX("tx_cmd with AES hwcrypto\n");
1611 break;
1612
1613 case WLAN_CIPHER_SUITE_TKIP:
1614 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
1615 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
1616 D_TX("tx_cmd with tkip hwcrypto\n");
1617 break;
1618
1619 case WLAN_CIPHER_SUITE_WEP104:
1620 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
1621 fallthrough;
1622 case WLAN_CIPHER_SUITE_WEP40:
1623 tx_cmd->sec_ctl |=
1624 (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) <<
1625 TX_CMD_SEC_SHIFT);
1626
1627 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
1628
1629 D_TX("Configuring packet for WEP encryption " "with key %d\n",
1630 keyconf->keyidx);
1631 break;
1632
1633 default:
1634 IL_ERR("Unknown encode cipher %x\n", keyconf->cipher);
1635 break;
1636 }
1637 }
1638
1639 /*
1640 * start C_TX command process
1641 */
1642 int
1643 il4965_tx_skb(struct il_priv *il,
1644 struct ieee80211_sta *sta,
1645 struct sk_buff *skb)
1646 {
1647 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1648 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1649 struct il_station_priv *sta_priv = NULL;
1650 struct il_tx_queue *txq;
1651 struct il_queue *q;
1652 struct il_device_cmd *out_cmd;
1653 struct il_cmd_meta *out_meta;
1654 struct il_tx_cmd *tx_cmd;
1655 int txq_id;
1656 dma_addr_t phys_addr;
1657 dma_addr_t txcmd_phys;
1658 dma_addr_t scratch_phys;
1659 u16 len, firstlen, secondlen;
1660 u16 seq_number = 0;
1661 __le16 fc;
1662 u8 hdr_len;
1663 u8 sta_id;
1664 u8 wait_write_ptr = 0;
1665 u8 tid = 0;
1666 u8 *qc = NULL;
1667 unsigned long flags;
1668 bool is_agg = false;
1669
1670 spin_lock_irqsave(&il->lock, flags);
1671 if (il_is_rfkill(il)) {
1672 D_DROP("Dropping - RF KILL\n");
1673 goto drop_unlock;
1674 }
1675
1676 fc = hdr->frame_control;
1677
1678 #ifdef CONFIG_IWLEGACY_DEBUG
1679 if (ieee80211_is_auth(fc))
1680 D_TX("Sending AUTH frame\n");
1681 else if (ieee80211_is_assoc_req(fc))
1682 D_TX("Sending ASSOC frame\n");
1683 else if (ieee80211_is_reassoc_req(fc))
1684 D_TX("Sending REASSOC frame\n");
1685 #endif
1686
1687 hdr_len = ieee80211_hdrlen(fc);
1688
1689 /* For management frames use broadcast id to do not break aggregation */
1690 if (!ieee80211_is_data(fc))
1691 sta_id = il->hw_params.bcast_id;
1692 else {
1693 /* Find idx into station table for destination station */
1694 sta_id = il_sta_id_or_broadcast(il, sta);
1695
1696 if (sta_id == IL_INVALID_STATION) {
1697 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
1698 goto drop_unlock;
1699 }
1700 }
1701
1702 D_TX("station Id %d\n", sta_id);
1703
1704 if (sta)
1705 sta_priv = (void *)sta->drv_priv;
1706
1707 if (sta_priv && sta_priv->asleep &&
1708 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
1709 /*
1710 * This sends an asynchronous command to the device,
1711 * but we can rely on it being processed before the
1712 * next frame is processed -- and the next frame to
1713 * this station is the one that will consume this
1714 * counter.
1715 * For now set the counter to just 1 since we do not
1716 * support uAPSD yet.
1717 */
1718 il4965_sta_modify_sleep_tx_count(il, sta_id, 1);
1719 }
1720
1721 /* FIXME: remove me ? */
1722 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1723
1724 /* Access category (AC) is also the queue number */
1725 txq_id = skb_get_queue_mapping(skb);
1726
1727 /* irqs already disabled/saved above when locking il->lock */
1728 spin_lock(&il->sta_lock);
1729
1730 if (ieee80211_is_data_qos(fc)) {
1731 qc = ieee80211_get_qos_ctl(hdr);
1732 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
1733 if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) {
1734 spin_unlock(&il->sta_lock);
1735 goto drop_unlock;
1736 }
1737 seq_number = il->stations[sta_id].tid[tid].seq_number;
1738 seq_number &= IEEE80211_SCTL_SEQ;
1739 hdr->seq_ctrl =
1740 hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG);
1741 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1742 seq_number += 0x10;
1743 /* aggregation is on for this <sta,tid> */
1744 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1745 il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) {
1746 txq_id = il->stations[sta_id].tid[tid].agg.txq_id;
1747 is_agg = true;
1748 }
1749 }
1750
1751 txq = &il->txq[txq_id];
1752 q = &txq->q;
1753
1754 if (unlikely(il_queue_space(q) < q->high_mark)) {
1755 spin_unlock(&il->sta_lock);
1756 goto drop_unlock;
1757 }
1758
1759 if (ieee80211_is_data_qos(fc)) {
1760 il->stations[sta_id].tid[tid].tfds_in_queue++;
1761 if (!ieee80211_has_morefrags(fc))
1762 il->stations[sta_id].tid[tid].seq_number = seq_number;
1763 }
1764
1765 spin_unlock(&il->sta_lock);
1766
1767 txq->skbs[q->write_ptr] = skb;
1768
1769 /* Set up first empty entry in queue's array of Tx/cmd buffers */
1770 out_cmd = txq->cmd[q->write_ptr];
1771 out_meta = &txq->meta[q->write_ptr];
1772 tx_cmd = container_of(&out_cmd->cmd.tx, struct il_tx_cmd, __hdr);
1773 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
1774 memset(tx_cmd, 0, sizeof(struct il_tx_cmd));
1775
1776 /*
1777 * Set up the Tx-command (not MAC!) header.
1778 * Store the chosen Tx queue and TFD idx within the sequence field;
1779 * after Tx, uCode's Tx response will return this value so driver can
1780 * locate the frame within the tx queue and do post-tx processing.
1781 */
1782 out_cmd->hdr.cmd = C_TX;
1783 out_cmd->hdr.sequence =
1784 cpu_to_le16((u16)
1785 (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
1786
1787 /* Copy MAC header from skb into command buffer */
1788 memcpy(tx_cmd->hdr, hdr, hdr_len);
1789
1790 /* Total # bytes to be transmitted */
1791 tx_cmd->len = cpu_to_le16((u16) skb->len);
1792
1793 if (info->control.hw_key)
1794 il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id);
1795
1796 /* TODO need this for burst mode later on */
1797 il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id);
1798
1799 il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc);
1800
1801 /*
1802 * Use the first empty entry in this queue's command buffer array
1803 * to contain the Tx command and MAC header concatenated together
1804 * (payload data will be in another buffer).
1805 * Size of this varies, due to varying MAC header length.
1806 * If end is not dword aligned, we'll have 2 extra bytes at the end
1807 * of the MAC header (device reads on dword boundaries).
1808 * We'll tell device about this padding later.
1809 */
1810 len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len;
1811 firstlen = (len + 3) & ~3;
1812
1813 /* Tell NIC about any 2-byte padding after MAC header */
1814 if (firstlen != len)
1815 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
1816
1817 /* Physical address of this Tx command's header (not MAC header!),
1818 * within command buffer array. */
1819 txcmd_phys = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, firstlen,
1820 DMA_BIDIRECTIONAL);
1821 if (unlikely(dma_mapping_error(&il->pci_dev->dev, txcmd_phys)))
1822 goto drop_unlock;
1823
1824 /* Set up TFD's 2nd entry to point directly to remainder of skb,
1825 * if any (802.11 null frames have no payload). */
1826 secondlen = skb->len - hdr_len;
1827 if (secondlen > 0) {
1828 phys_addr = dma_map_single(&il->pci_dev->dev, skb->data + hdr_len,
1829 secondlen, DMA_TO_DEVICE);
1830 if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr)))
1831 goto drop_unlock;
1832 }
1833
1834 /* Add buffer containing Tx command and MAC(!) header to TFD's
1835 * first entry */
1836 il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
1837 dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
1838 dma_unmap_len_set(out_meta, len, firstlen);
1839 if (secondlen)
1840 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen,
1841 0, 0);
1842
1843 if (!ieee80211_has_morefrags(hdr->frame_control)) {
1844 txq->need_update = 1;
1845 } else {
1846 wait_write_ptr = 1;
1847 txq->need_update = 0;
1848 }
1849
1850 scratch_phys =
1851 txcmd_phys + sizeof(struct il_cmd_header) +
1852 offsetof(struct il_tx_cmd, scratch);
1853
1854 /* take back ownership of DMA buffer to enable update */
1855 dma_sync_single_for_cpu(&il->pci_dev->dev, txcmd_phys, firstlen,
1856 DMA_BIDIRECTIONAL);
1857 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
1858 tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys);
1859
1860 il_update_stats(il, true, fc, skb->len);
1861
1862 D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
1863 D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
1864 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd));
1865 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len);
1866
1867 /* Set up entry for this TFD in Tx byte-count array */
1868 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1869 il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len));
1870
1871 dma_sync_single_for_device(&il->pci_dev->dev, txcmd_phys, firstlen,
1872 DMA_BIDIRECTIONAL);
1873
1874 /* Tell device the write idx *just past* this latest filled TFD */
1875 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
1876 il_txq_update_write_ptr(il, txq);
1877 spin_unlock_irqrestore(&il->lock, flags);
1878
1879 /*
1880 * At this point the frame is "transmitted" successfully
1881 * and we will get a TX status notification eventually,
1882 * regardless of the value of ret. "ret" only indicates
1883 * whether or not we should update the write pointer.
1884 */
1885
1886 /*
1887 * Avoid atomic ops if it isn't an associated client.
1888 * Also, if this is a packet for aggregation, don't
1889 * increase the counter because the ucode will stop
1890 * aggregation queues when their respective station
1891 * goes to sleep.
1892 */
1893 if (sta_priv && sta_priv->client && !is_agg)
1894 atomic_inc(&sta_priv->pending_frames);
1895
1896 if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
1897 if (wait_write_ptr) {
1898 spin_lock_irqsave(&il->lock, flags);
1899 txq->need_update = 1;
1900 il_txq_update_write_ptr(il, txq);
1901 spin_unlock_irqrestore(&il->lock, flags);
1902 } else {
1903 il_stop_queue(il, txq);
1904 }
1905 }
1906
1907 return 0;
1908
1909 drop_unlock:
1910 spin_unlock_irqrestore(&il->lock, flags);
1911 return -1;
1912 }
1913
1914 static inline int
1915 il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size)
1916 {
1917 ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma,
1918 GFP_KERNEL);
1919 if (!ptr->addr)
1920 return -ENOMEM;
1921 ptr->size = size;
1922 return 0;
1923 }
1924
1925 static inline void
1926 il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr)
1927 {
1928 if (unlikely(!ptr->addr))
1929 return;
1930
1931 dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma);
1932 memset(ptr, 0, sizeof(*ptr));
1933 }
1934
1935 /*
1936 * il4965_hw_txq_ctx_free - Free TXQ Context
1937 *
1938 * Destroy all TX DMA queues and structures
1939 */
1940 void
1941 il4965_hw_txq_ctx_free(struct il_priv *il)
1942 {
1943 int txq_id;
1944
1945 /* Tx queues */
1946 if (il->txq) {
1947 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
1948 if (txq_id == il->cmd_queue)
1949 il_cmd_queue_free(il);
1950 else
1951 il_tx_queue_free(il, txq_id);
1952 }
1953 il4965_free_dma_ptr(il, &il->kw);
1954
1955 il4965_free_dma_ptr(il, &il->scd_bc_tbls);
1956
1957 /* free tx queue structure */
1958 il_free_txq_mem(il);
1959 }
1960
1961 /*
1962 * il4965_txq_ctx_alloc - allocate TX queue context
1963 * Allocate all Tx DMA structures and initialize them
1964 */
1965 int
1966 il4965_txq_ctx_alloc(struct il_priv *il)
1967 {
1968 int ret, txq_id;
1969 unsigned long flags;
1970
1971 /* Free all tx/cmd queues and keep-warm buffer */
1972 il4965_hw_txq_ctx_free(il);
1973
1974 ret =
1975 il4965_alloc_dma_ptr(il, &il->scd_bc_tbls,
1976 il->hw_params.scd_bc_tbls_size);
1977 if (ret) {
1978 IL_ERR("Scheduler BC Table allocation failed\n");
1979 goto error_bc_tbls;
1980 }
1981 /* Alloc keep-warm buffer */
1982 ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE);
1983 if (ret) {
1984 IL_ERR("Keep Warm allocation failed\n");
1985 goto error_kw;
1986 }
1987
1988 /* allocate tx queue structure */
1989 ret = il_alloc_txq_mem(il);
1990 if (ret)
1991 goto error;
1992
1993 spin_lock_irqsave(&il->lock, flags);
1994
1995 /* Turn off all Tx DMA fifos */
1996 il4965_txq_set_sched(il, 0);
1997
1998 /* Tell NIC where to find the "keep warm" buffer */
1999 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2000
2001 spin_unlock_irqrestore(&il->lock, flags);
2002
2003 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
2004 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
2005 ret = il_tx_queue_init(il, txq_id);
2006 if (ret) {
2007 IL_ERR("Tx %d queue init failed\n", txq_id);
2008 goto error;
2009 }
2010 }
2011
2012 return ret;
2013
2014 error:
2015 il4965_hw_txq_ctx_free(il);
2016 il4965_free_dma_ptr(il, &il->kw);
2017 error_kw:
2018 il4965_free_dma_ptr(il, &il->scd_bc_tbls);
2019 error_bc_tbls:
2020 return ret;
2021 }
2022
2023 void
2024 il4965_txq_ctx_reset(struct il_priv *il)
2025 {
2026 int txq_id;
2027 unsigned long flags;
2028
2029 spin_lock_irqsave(&il->lock, flags);
2030
2031 /* Turn off all Tx DMA fifos */
2032 il4965_txq_set_sched(il, 0);
2033 /* Tell NIC where to find the "keep warm" buffer */
2034 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2035
2036 spin_unlock_irqrestore(&il->lock, flags);
2037
2038 /* Alloc and init all Tx queues, including the command queue (#4) */
2039 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2040 il_tx_queue_reset(il, txq_id);
2041 }
2042
2043 static void
2044 il4965_txq_ctx_unmap(struct il_priv *il)
2045 {
2046 int txq_id;
2047
2048 if (!il->txq)
2049 return;
2050
2051 /* Unmap DMA from host system and free skb's */
2052 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2053 if (txq_id == il->cmd_queue)
2054 il_cmd_queue_unmap(il);
2055 else
2056 il_tx_queue_unmap(il, txq_id);
2057 }
2058
2059 /*
2060 * il4965_txq_ctx_stop - Stop all Tx DMA channels
2061 */
2062 void
2063 il4965_txq_ctx_stop(struct il_priv *il)
2064 {
2065 int ch, ret;
2066
2067 _il_wr_prph(il, IL49_SCD_TXFACT, 0);
2068
2069 /* Stop each Tx DMA channel, and wait for it to be idle */
2070 for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
2071 _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
2072 ret =
2073 _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG,
2074 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2075 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2076 1000);
2077 if (ret < 0)
2078 IL_ERR("Timeout stopping DMA channel %d [0x%08x]",
2079 ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG));
2080 }
2081 }
2082
2083 /*
2084 * Find first available (lowest unused) Tx Queue, mark it "active".
2085 * Called only when finding queue for aggregation.
2086 * Should never return anything < 7, because they should already
2087 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
2088 */
2089 static int
2090 il4965_txq_ctx_activate_free(struct il_priv *il)
2091 {
2092 int txq_id;
2093
2094 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2095 if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk))
2096 return txq_id;
2097 return -1;
2098 }
2099
2100 /*
2101 * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
2102 */
2103 static void
2104 il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id)
2105 {
2106 /* Simply stop the queue, but don't change any configuration;
2107 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
2108 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
2109 (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
2110 (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
2111 }
2112
2113 /*
2114 * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
2115 */
2116 static int
2117 il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id)
2118 {
2119 u32 tbl_dw_addr;
2120 u32 tbl_dw;
2121 u16 scd_q2ratid;
2122
2123 scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
2124
2125 tbl_dw_addr =
2126 il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
2127
2128 tbl_dw = il_read_targ_mem(il, tbl_dw_addr);
2129
2130 if (txq_id & 0x1)
2131 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
2132 else
2133 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
2134
2135 il_write_targ_mem(il, tbl_dw_addr, tbl_dw);
2136
2137 return 0;
2138 }
2139
2140 /*
2141 * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
2142 *
2143 * NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE,
2144 * i.e. it must be one of the higher queues used for aggregation
2145 */
2146 static int
2147 il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id,
2148 int tid, u16 ssn_idx)
2149 {
2150 unsigned long flags;
2151 u16 ra_tid;
2152 int ret;
2153
2154 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2155 (IL49_FIRST_AMPDU_QUEUE +
2156 il->cfg->num_of_ampdu_queues <= txq_id)) {
2157 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2158 txq_id, IL49_FIRST_AMPDU_QUEUE,
2159 IL49_FIRST_AMPDU_QUEUE +
2160 il->cfg->num_of_ampdu_queues - 1);
2161 return -EINVAL;
2162 }
2163
2164 ra_tid = BUILD_RAxTID(sta_id, tid);
2165
2166 /* Modify device's station table to Tx this TID */
2167 ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid);
2168 if (ret)
2169 return ret;
2170
2171 spin_lock_irqsave(&il->lock, flags);
2172
2173 /* Stop this Tx queue before configuring it */
2174 il4965_tx_queue_stop_scheduler(il, txq_id);
2175
2176 /* Map receiver-address / traffic-ID to this queue */
2177 il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id);
2178
2179 /* Set this queue as a chain-building queue */
2180 il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2181
2182 /* Place first TFD at idx corresponding to start sequence number.
2183 * Assumes that ssn_idx is valid (!= 0xFFF) */
2184 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2185 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2186 il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2187
2188 /* Set up Tx win size and frame limit for this queue */
2189 il_write_targ_mem(il,
2190 il->scd_base_addr +
2191 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
2192 (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS)
2193 & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
2194
2195 il_write_targ_mem(il,
2196 il->scd_base_addr +
2197 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
2198 (SCD_FRAME_LIMIT <<
2199 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
2200 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
2201
2202 il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2203
2204 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
2205 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1);
2206
2207 spin_unlock_irqrestore(&il->lock, flags);
2208
2209 return 0;
2210 }
2211
2212 int
2213 il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif,
2214 struct ieee80211_sta *sta, u16 tid, u16 * ssn)
2215 {
2216 int sta_id;
2217 int tx_fifo;
2218 int txq_id;
2219 int ret;
2220 unsigned long flags;
2221 struct il_tid_data *tid_data;
2222
2223 /* FIXME: warning if tx fifo not found ? */
2224 tx_fifo = il4965_get_fifo_from_tid(tid);
2225 if (unlikely(tx_fifo < 0))
2226 return tx_fifo;
2227
2228 D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid);
2229
2230 sta_id = il_sta_id(sta);
2231 if (sta_id == IL_INVALID_STATION) {
2232 IL_ERR("Start AGG on invalid station\n");
2233 return -ENXIO;
2234 }
2235 if (unlikely(tid >= MAX_TID_COUNT))
2236 return -EINVAL;
2237
2238 if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) {
2239 IL_ERR("Start AGG when state is not IL_AGG_OFF !\n");
2240 return -ENXIO;
2241 }
2242
2243 txq_id = il4965_txq_ctx_activate_free(il);
2244 if (txq_id == -1) {
2245 IL_ERR("No free aggregation queue available\n");
2246 return -ENXIO;
2247 }
2248
2249 spin_lock_irqsave(&il->sta_lock, flags);
2250 tid_data = &il->stations[sta_id].tid[tid];
2251 *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2252 tid_data->agg.txq_id = txq_id;
2253 il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id);
2254 spin_unlock_irqrestore(&il->sta_lock, flags);
2255
2256 ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn);
2257 if (ret)
2258 return ret;
2259
2260 spin_lock_irqsave(&il->sta_lock, flags);
2261 tid_data = &il->stations[sta_id].tid[tid];
2262 if (tid_data->tfds_in_queue == 0) {
2263 D_HT("HW queue is empty\n");
2264 tid_data->agg.state = IL_AGG_ON;
2265 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
2266 } else {
2267 D_HT("HW queue is NOT empty: %d packets in HW queue\n",
2268 tid_data->tfds_in_queue);
2269 tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA;
2270 }
2271 spin_unlock_irqrestore(&il->sta_lock, flags);
2272 return ret;
2273 }
2274
2275 /*
2276 * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE
2277 * il->lock must be held by the caller
2278 */
2279 static int
2280 il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo)
2281 {
2282 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2283 (IL49_FIRST_AMPDU_QUEUE +
2284 il->cfg->num_of_ampdu_queues <= txq_id)) {
2285 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2286 txq_id, IL49_FIRST_AMPDU_QUEUE,
2287 IL49_FIRST_AMPDU_QUEUE +
2288 il->cfg->num_of_ampdu_queues - 1);
2289 return -EINVAL;
2290 }
2291
2292 il4965_tx_queue_stop_scheduler(il, txq_id);
2293
2294 il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2295
2296 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2297 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2298 /* supposes that ssn_idx is valid (!= 0xFFF) */
2299 il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2300
2301 il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2302 il_txq_ctx_deactivate(il, txq_id);
2303 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0);
2304
2305 return 0;
2306 }
2307
2308 int
2309 il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif,
2310 struct ieee80211_sta *sta, u16 tid)
2311 {
2312 int tx_fifo_id, txq_id, sta_id, ssn;
2313 struct il_tid_data *tid_data;
2314 int write_ptr, read_ptr;
2315 unsigned long flags;
2316
2317 /* FIXME: warning if tx_fifo_id not found ? */
2318 tx_fifo_id = il4965_get_fifo_from_tid(tid);
2319 if (unlikely(tx_fifo_id < 0))
2320 return tx_fifo_id;
2321
2322 sta_id = il_sta_id(sta);
2323
2324 if (sta_id == IL_INVALID_STATION) {
2325 IL_ERR("Invalid station for AGG tid %d\n", tid);
2326 return -ENXIO;
2327 }
2328
2329 spin_lock_irqsave(&il->sta_lock, flags);
2330
2331 tid_data = &il->stations[sta_id].tid[tid];
2332 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
2333 txq_id = tid_data->agg.txq_id;
2334
2335 switch (il->stations[sta_id].tid[tid].agg.state) {
2336 case IL_EMPTYING_HW_QUEUE_ADDBA:
2337 /*
2338 * This can happen if the peer stops aggregation
2339 * again before we've had a chance to drain the
2340 * queue we selected previously, i.e. before the
2341 * session was really started completely.
2342 */
2343 D_HT("AGG stop before setup done\n");
2344 goto turn_off;
2345 case IL_AGG_ON:
2346 break;
2347 default:
2348 IL_WARN("Stopping AGG while state not ON or starting\n");
2349 }
2350
2351 write_ptr = il->txq[txq_id].q.write_ptr;
2352 read_ptr = il->txq[txq_id].q.read_ptr;
2353
2354 /* The queue is not empty */
2355 if (write_ptr != read_ptr) {
2356 D_HT("Stopping a non empty AGG HW QUEUE\n");
2357 il->stations[sta_id].tid[tid].agg.state =
2358 IL_EMPTYING_HW_QUEUE_DELBA;
2359 spin_unlock_irqrestore(&il->sta_lock, flags);
2360 return 0;
2361 }
2362
2363 D_HT("HW queue is empty\n");
2364 turn_off:
2365 il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF;
2366
2367 /* do not restore/save irqs */
2368 spin_unlock(&il->sta_lock);
2369 spin_lock(&il->lock);
2370
2371 /*
2372 * the only reason this call can fail is queue number out of range,
2373 * which can happen if uCode is reloaded and all the station
2374 * information are lost. if it is outside the range, there is no need
2375 * to deactivate the uCode queue, just return "success" to allow
2376 * mac80211 to clean up it own data.
2377 */
2378 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id);
2379 spin_unlock_irqrestore(&il->lock, flags);
2380
2381 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2382
2383 return 0;
2384 }
2385
2386 int
2387 il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id)
2388 {
2389 struct il_queue *q = &il->txq[txq_id].q;
2390 u8 *addr = il->stations[sta_id].sta.sta.addr;
2391 struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid];
2392
2393 lockdep_assert_held(&il->sta_lock);
2394
2395 switch (il->stations[sta_id].tid[tid].agg.state) {
2396 case IL_EMPTYING_HW_QUEUE_DELBA:
2397 /* We are reclaiming the last packet of the */
2398 /* aggregated HW queue */
2399 if (txq_id == tid_data->agg.txq_id &&
2400 q->read_ptr == q->write_ptr) {
2401 u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2402 int tx_fifo = il4965_get_fifo_from_tid(tid);
2403 D_HT("HW queue empty: continue DELBA flow\n");
2404 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo);
2405 tid_data->agg.state = IL_AGG_OFF;
2406 ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid);
2407 }
2408 break;
2409 case IL_EMPTYING_HW_QUEUE_ADDBA:
2410 /* We are reclaiming the last packet of the queue */
2411 if (tid_data->tfds_in_queue == 0) {
2412 D_HT("HW queue empty: continue ADDBA flow\n");
2413 tid_data->agg.state = IL_AGG_ON;
2414 ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid);
2415 }
2416 break;
2417 }
2418
2419 return 0;
2420 }
2421
2422 static void
2423 il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1)
2424 {
2425 struct ieee80211_sta *sta;
2426 struct il_station_priv *sta_priv;
2427
2428 rcu_read_lock();
2429 sta = ieee80211_find_sta(il->vif, addr1);
2430 if (sta) {
2431 sta_priv = (void *)sta->drv_priv;
2432 /* avoid atomic ops if this isn't a client */
2433 if (sta_priv->client &&
2434 atomic_dec_return(&sta_priv->pending_frames) == 0)
2435 ieee80211_sta_block_awake(il->hw, sta, false);
2436 }
2437 rcu_read_unlock();
2438 }
2439
2440 static void
2441 il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg)
2442 {
2443 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2444
2445 if (!is_agg)
2446 il4965_non_agg_tx_status(il, hdr->addr1);
2447
2448 ieee80211_tx_status_irqsafe(il->hw, skb);
2449 }
2450
2451 int
2452 il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
2453 {
2454 struct il_tx_queue *txq = &il->txq[txq_id];
2455 struct il_queue *q = &txq->q;
2456 int nfreed = 0;
2457 struct ieee80211_hdr *hdr;
2458 struct sk_buff *skb;
2459
2460 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
2461 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
2462 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
2463 q->write_ptr, q->read_ptr);
2464 return 0;
2465 }
2466
2467 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
2468 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2469
2470 skb = txq->skbs[txq->q.read_ptr];
2471
2472 if (WARN_ON_ONCE(skb == NULL))
2473 continue;
2474
2475 hdr = (struct ieee80211_hdr *) skb->data;
2476 if (ieee80211_is_data_qos(hdr->frame_control))
2477 nfreed++;
2478
2479 il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE);
2480
2481 txq->skbs[txq->q.read_ptr] = NULL;
2482 il->ops->txq_free_tfd(il, txq);
2483 }
2484 return nfreed;
2485 }
2486
2487 /*
2488 * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack
2489 *
2490 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
2491 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
2492 */
2493 static int
2494 il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg,
2495 struct il_compressed_ba_resp *ba_resp)
2496 {
2497 int i, sh, ack;
2498 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
2499 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2500 int successes = 0;
2501 struct ieee80211_tx_info *info;
2502 u64 bitmap, sent_bitmap;
2503
2504 if (unlikely(!agg->wait_for_ba)) {
2505 if (unlikely(ba_resp->bitmap))
2506 IL_ERR("Received BA when not expected\n");
2507 return -EINVAL;
2508 }
2509
2510 /* Mark that the expected block-ack response arrived */
2511 agg->wait_for_ba = 0;
2512 D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
2513
2514 /* Calculate shift to align block-ack bits with our Tx win bits */
2515 sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4);
2516 if (sh < 0) /* tbw something is wrong with indices */
2517 sh += 0x100;
2518
2519 if (agg->frame_count > (64 - sh)) {
2520 D_TX_REPLY("more frames than bitmap size");
2521 return -1;
2522 }
2523
2524 /* don't use 64-bit values for now */
2525 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
2526
2527 /* check for success or failure according to the
2528 * transmitted bitmap and block-ack bitmap */
2529 sent_bitmap = bitmap & agg->bitmap;
2530
2531 /* For each frame attempted in aggregation,
2532 * update driver's record of tx frame's status. */
2533 i = 0;
2534 while (sent_bitmap) {
2535 ack = sent_bitmap & 1ULL;
2536 successes += ack;
2537 D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK",
2538 i, (agg->start_idx + i) & 0xff, agg->start_idx + i);
2539 sent_bitmap >>= 1;
2540 ++i;
2541 }
2542
2543 D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
2544
2545 info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]);
2546 memset(&info->status, 0, sizeof(info->status));
2547 info->flags |= IEEE80211_TX_STAT_ACK;
2548 info->flags |= IEEE80211_TX_STAT_AMPDU;
2549 info->status.ampdu_ack_len = successes;
2550 info->status.ampdu_len = agg->frame_count;
2551 il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info);
2552
2553 return 0;
2554 }
2555
2556 static inline bool
2557 il4965_is_tx_success(u32 status)
2558 {
2559 status &= TX_STATUS_MSK;
2560 return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE);
2561 }
2562
2563 static u8
2564 il4965_find_station(struct il_priv *il, const u8 *addr)
2565 {
2566 int i;
2567 int start = 0;
2568 int ret = IL_INVALID_STATION;
2569 unsigned long flags;
2570
2571 if (il->iw_mode == NL80211_IFTYPE_ADHOC)
2572 start = IL_STA_ID;
2573
2574 if (is_broadcast_ether_addr(addr))
2575 return il->hw_params.bcast_id;
2576
2577 spin_lock_irqsave(&il->sta_lock, flags);
2578 for (i = start; i < il->hw_params.max_stations; i++)
2579 if (il->stations[i].used &&
2580 ether_addr_equal(il->stations[i].sta.sta.addr, addr)) {
2581 ret = i;
2582 goto out;
2583 }
2584
2585 D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations);
2586
2587 out:
2588 /*
2589 * It may be possible that more commands interacting with stations
2590 * arrive before we completed processing the adding of
2591 * station
2592 */
2593 if (ret != IL_INVALID_STATION &&
2594 (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) ||
2595 (il->stations[ret].used & IL_STA_UCODE_INPROGRESS))) {
2596 IL_ERR("Requested station info for sta %d before ready.\n",
2597 ret);
2598 ret = IL_INVALID_STATION;
2599 }
2600 spin_unlock_irqrestore(&il->sta_lock, flags);
2601 return ret;
2602 }
2603
2604 static int
2605 il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr)
2606 {
2607 if (il->iw_mode == NL80211_IFTYPE_STATION)
2608 return IL_AP_ID;
2609 else {
2610 u8 *da = ieee80211_get_DA(hdr);
2611
2612 return il4965_find_station(il, da);
2613 }
2614 }
2615
2616 static inline u32
2617 il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp)
2618 {
2619 return le32_to_cpup(&tx_resp->u.status +
2620 tx_resp->frame_count) & IEEE80211_MAX_SN;
2621 }
2622
2623 static inline u32
2624 il4965_tx_status_to_mac80211(u32 status)
2625 {
2626 status &= TX_STATUS_MSK;
2627
2628 switch (status) {
2629 case TX_STATUS_SUCCESS:
2630 case TX_STATUS_DIRECT_DONE:
2631 return IEEE80211_TX_STAT_ACK;
2632 case TX_STATUS_FAIL_DEST_PS:
2633 return IEEE80211_TX_STAT_TX_FILTERED;
2634 default:
2635 return 0;
2636 }
2637 }
2638
2639 /*
2640 * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
2641 */
2642 static int
2643 il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg,
2644 struct il4965_tx_resp *tx_resp, int txq_id,
2645 u16 start_idx)
2646 {
2647 u16 status;
2648 struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2649 struct ieee80211_tx_info *info = NULL;
2650 struct ieee80211_hdr *hdr = NULL;
2651 u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2652 int i, sh, idx;
2653 u16 seq;
2654 if (agg->wait_for_ba)
2655 D_TX_REPLY("got tx response w/o block-ack\n");
2656
2657 agg->frame_count = tx_resp->frame_count;
2658 agg->start_idx = start_idx;
2659 agg->rate_n_flags = rate_n_flags;
2660 agg->bitmap = 0;
2661
2662 /* num frames attempted by Tx command */
2663 if (agg->frame_count == 1) {
2664 /* Only one frame was attempted; no block-ack will arrive */
2665 status = le16_to_cpu(frame_status[0].status);
2666 idx = start_idx;
2667
2668 D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2669 agg->frame_count, agg->start_idx, idx);
2670
2671 info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]);
2672 info->status.rates[0].count = tx_resp->failure_frame + 1;
2673 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2674 info->flags |= il4965_tx_status_to_mac80211(status);
2675 il4965_hwrate_to_tx_control(il, rate_n_flags, info);
2676
2677 D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff,
2678 tx_resp->failure_frame);
2679 D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
2680
2681 agg->wait_for_ba = 0;
2682 } else {
2683 /* Two or more frames were attempted; expect block-ack */
2684 u64 bitmap = 0;
2685 int start = agg->start_idx;
2686 struct sk_buff *skb;
2687
2688 /* Construct bit-map of pending frames within Tx win */
2689 for (i = 0; i < agg->frame_count; i++) {
2690 u16 sc;
2691 status = le16_to_cpu(frame_status[i].status);
2692 seq = le16_to_cpu(frame_status[i].sequence);
2693 idx = SEQ_TO_IDX(seq);
2694 txq_id = SEQ_TO_QUEUE(seq);
2695
2696 if (status &
2697 (AGG_TX_STATE_FEW_BYTES_MSK |
2698 AGG_TX_STATE_ABORT_MSK))
2699 continue;
2700
2701 D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2702 agg->frame_count, txq_id, idx);
2703
2704 skb = il->txq[txq_id].skbs[idx];
2705 if (WARN_ON_ONCE(skb == NULL))
2706 return -1;
2707 hdr = (struct ieee80211_hdr *) skb->data;
2708
2709 sc = le16_to_cpu(hdr->seq_ctrl);
2710 if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) {
2711 IL_ERR("BUG_ON idx doesn't match seq control"
2712 " idx=%d, seq_idx=%d, seq=%d\n", idx,
2713 IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl);
2714 return -1;
2715 }
2716
2717 D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx,
2718 IEEE80211_SEQ_TO_SN(sc));
2719
2720 sh = idx - start;
2721 if (sh > 64) {
2722 sh = (start - idx) + 0xff;
2723 bitmap = bitmap << sh;
2724 sh = 0;
2725 start = idx;
2726 } else if (sh < -64)
2727 sh = 0xff - (start - idx);
2728 else if (sh < 0) {
2729 sh = start - idx;
2730 start = idx;
2731 bitmap = bitmap << sh;
2732 sh = 0;
2733 }
2734 bitmap |= 1ULL << sh;
2735 D_TX_REPLY("start=%d bitmap=0x%llx\n", start,
2736 (unsigned long long)bitmap);
2737 }
2738
2739 agg->bitmap = bitmap;
2740 agg->start_idx = start;
2741 D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2742 agg->frame_count, agg->start_idx,
2743 (unsigned long long)agg->bitmap);
2744
2745 if (bitmap)
2746 agg->wait_for_ba = 1;
2747 }
2748 return 0;
2749 }
2750
2751 /*
2752 * il4965_hdl_tx - Handle standard (non-aggregation) Tx response
2753 */
2754 static void
2755 il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
2756 {
2757 struct il_rx_pkt *pkt = rxb_addr(rxb);
2758 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2759 int txq_id = SEQ_TO_QUEUE(sequence);
2760 int idx = SEQ_TO_IDX(sequence);
2761 struct il_tx_queue *txq = &il->txq[txq_id];
2762 struct sk_buff *skb;
2763 struct ieee80211_hdr *hdr;
2764 struct ieee80211_tx_info *info;
2765 struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2766 u32 status = le32_to_cpu(tx_resp->u.status);
2767 int tid;
2768 int sta_id;
2769 int freed;
2770 u8 *qc = NULL;
2771 unsigned long flags;
2772
2773 if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) {
2774 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d "
2775 "is out of range [0-%d] %d %d\n", txq_id, idx,
2776 txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr);
2777 return;
2778 }
2779
2780 txq->time_stamp = jiffies;
2781
2782 skb = txq->skbs[txq->q.read_ptr];
2783 info = IEEE80211_SKB_CB(skb);
2784 memset(&info->status, 0, sizeof(info->status));
2785
2786 hdr = (struct ieee80211_hdr *) skb->data;
2787 if (ieee80211_is_data_qos(hdr->frame_control)) {
2788 qc = ieee80211_get_qos_ctl(hdr);
2789 tid = qc[0] & 0xf;
2790 }
2791
2792 sta_id = il4965_get_ra_sta_id(il, hdr);
2793 if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) {
2794 IL_ERR("Station not known\n");
2795 return;
2796 }
2797
2798 /*
2799 * Firmware will not transmit frame on passive channel, if it not yet
2800 * received some valid frame on that channel. When this error happen
2801 * we have to wait until firmware will unblock itself i.e. when we
2802 * note received beacon or other frame. We unblock queues in
2803 * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed.
2804 */
2805 if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) &&
2806 il->iw_mode == NL80211_IFTYPE_STATION) {
2807 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
2808 D_INFO("Stopped queues - RX waiting on passive channel\n");
2809 }
2810
2811 spin_lock_irqsave(&il->sta_lock, flags);
2812 if (txq->sched_retry) {
2813 const u32 scd_ssn = il4965_get_scd_ssn(tx_resp);
2814 struct il_ht_agg *agg;
2815
2816 if (WARN_ON(!qc))
2817 goto out;
2818
2819 agg = &il->stations[sta_id].tid[tid].agg;
2820
2821 il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx);
2822
2823 /* check if BAR is needed */
2824 if (tx_resp->frame_count == 1 &&
2825 !il4965_is_tx_success(status))
2826 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2827
2828 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2829 idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2830 D_TX_REPLY("Retry scheduler reclaim scd_ssn "
2831 "%d idx %d\n", scd_ssn, idx);
2832 freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2833 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2834
2835 if (il->mac80211_registered &&
2836 il_queue_space(&txq->q) > txq->q.low_mark &&
2837 agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2838 il_wake_queue(il, txq);
2839 }
2840 } else {
2841 info->status.rates[0].count = tx_resp->failure_frame + 1;
2842 info->flags |= il4965_tx_status_to_mac80211(status);
2843 il4965_hwrate_to_tx_control(il,
2844 le32_to_cpu(tx_resp->rate_n_flags),
2845 info);
2846
2847 D_TX_REPLY("TXQ %d status %s (0x%08x) "
2848 "rate_n_flags 0x%x retries %d\n", txq_id,
2849 il4965_get_tx_fail_reason(status), status,
2850 le32_to_cpu(tx_resp->rate_n_flags),
2851 tx_resp->failure_frame);
2852
2853 freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2854 if (qc && likely(sta_id != IL_INVALID_STATION))
2855 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2856 else if (sta_id == IL_INVALID_STATION)
2857 D_TX_REPLY("Station not known\n");
2858
2859 if (il->mac80211_registered &&
2860 il_queue_space(&txq->q) > txq->q.low_mark)
2861 il_wake_queue(il, txq);
2862 }
2863 out:
2864 if (qc && likely(sta_id != IL_INVALID_STATION))
2865 il4965_txq_check_empty(il, sta_id, tid, txq_id);
2866
2867 il4965_check_abort_status(il, tx_resp->frame_count, status);
2868
2869 spin_unlock_irqrestore(&il->sta_lock, flags);
2870 }
2871
2872 /*
2873 * translate ucode response to mac80211 tx status control values
2874 */
2875 void
2876 il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags,
2877 struct ieee80211_tx_info *info)
2878 {
2879 struct ieee80211_tx_rate *r = &info->status.rates[0];
2880
2881 info->status.antenna =
2882 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
2883 if (rate_n_flags & RATE_MCS_HT_MSK)
2884 r->flags |= IEEE80211_TX_RC_MCS;
2885 if (rate_n_flags & RATE_MCS_GF_MSK)
2886 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
2887 if (rate_n_flags & RATE_MCS_HT40_MSK)
2888 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2889 if (rate_n_flags & RATE_MCS_DUP_MSK)
2890 r->flags |= IEEE80211_TX_RC_DUP_DATA;
2891 if (rate_n_flags & RATE_MCS_SGI_MSK)
2892 r->flags |= IEEE80211_TX_RC_SHORT_GI;
2893 r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band);
2894 }
2895
2896 /*
2897 * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA
2898 *
2899 * Handles block-acknowledge notification from device, which reports success
2900 * of frames sent via aggregation.
2901 */
2902 static void
2903 il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb)
2904 {
2905 struct il_rx_pkt *pkt = rxb_addr(rxb);
2906 struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
2907 struct il_tx_queue *txq = NULL;
2908 struct il_ht_agg *agg;
2909 int idx;
2910 int sta_id;
2911 int tid;
2912 unsigned long flags;
2913
2914 /* "flow" corresponds to Tx queue */
2915 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2916
2917 /* "ssn" is start of block-ack Tx win, corresponds to idx
2918 * (in Tx queue's circular buffer) of first TFD/frame in win */
2919 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
2920
2921 if (scd_flow >= il->hw_params.max_txq_num) {
2922 IL_ERR("BUG_ON scd_flow is bigger than number of queues\n");
2923 return;
2924 }
2925
2926 txq = &il->txq[scd_flow];
2927 sta_id = ba_resp->sta_id;
2928 tid = ba_resp->tid;
2929 agg = &il->stations[sta_id].tid[tid].agg;
2930 if (unlikely(agg->txq_id != scd_flow)) {
2931 /*
2932 * FIXME: this is a uCode bug which need to be addressed,
2933 * log the information and return for now!
2934 * since it is possible happen very often and in order
2935 * not to fill the syslog, don't enable the logging by default
2936 */
2937 D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n",
2938 scd_flow, agg->txq_id);
2939 return;
2940 }
2941
2942 /* Find idx just before block-ack win */
2943 idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
2944
2945 spin_lock_irqsave(&il->sta_lock, flags);
2946
2947 D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n",
2948 agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32,
2949 ba_resp->sta_id);
2950 D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = "
2951 "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl,
2952 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
2953 ba_resp->scd_flow, ba_resp->scd_ssn);
2954 D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx,
2955 (unsigned long long)agg->bitmap);
2956
2957 /* Update driver's record of ACK vs. not for each frame in win */
2958 il4965_tx_status_reply_compressed_ba(il, agg, ba_resp);
2959
2960 /* Release all TFDs before the SSN, i.e. all TFDs in front of
2961 * block-ack win (we assume that they've been successfully
2962 * transmitted ... if not, it's too late anyway). */
2963 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
2964 /* calculate mac80211 ampdu sw queue to wake */
2965 int freed = il4965_tx_queue_reclaim(il, scd_flow, idx);
2966 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2967
2968 if (il_queue_space(&txq->q) > txq->q.low_mark &&
2969 il->mac80211_registered &&
2970 agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2971 il_wake_queue(il, txq);
2972
2973 il4965_txq_check_empty(il, sta_id, tid, scd_flow);
2974 }
2975
2976 spin_unlock_irqrestore(&il->sta_lock, flags);
2977 }
2978
2979 #ifdef CONFIG_IWLEGACY_DEBUG
2980 const char *
2981 il4965_get_tx_fail_reason(u32 status)
2982 {
2983 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
2984 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
2985
2986 switch (status & TX_STATUS_MSK) {
2987 case TX_STATUS_SUCCESS:
2988 return "SUCCESS";
2989 TX_STATUS_POSTPONE(DELAY);
2990 TX_STATUS_POSTPONE(FEW_BYTES);
2991 TX_STATUS_POSTPONE(QUIET_PERIOD);
2992 TX_STATUS_POSTPONE(CALC_TTAK);
2993 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
2994 TX_STATUS_FAIL(SHORT_LIMIT);
2995 TX_STATUS_FAIL(LONG_LIMIT);
2996 TX_STATUS_FAIL(FIFO_UNDERRUN);
2997 TX_STATUS_FAIL(DRAIN_FLOW);
2998 TX_STATUS_FAIL(RFKILL_FLUSH);
2999 TX_STATUS_FAIL(LIFE_EXPIRE);
3000 TX_STATUS_FAIL(DEST_PS);
3001 TX_STATUS_FAIL(HOST_ABORTED);
3002 TX_STATUS_FAIL(BT_RETRY);
3003 TX_STATUS_FAIL(STA_INVALID);
3004 TX_STATUS_FAIL(FRAG_DROPPED);
3005 TX_STATUS_FAIL(TID_DISABLE);
3006 TX_STATUS_FAIL(FIFO_FLUSHED);
3007 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
3008 TX_STATUS_FAIL(PASSIVE_NO_RX);
3009 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
3010 }
3011
3012 return "UNKNOWN";
3013
3014 #undef TX_STATUS_FAIL
3015 #undef TX_STATUS_POSTPONE
3016 }
3017 #endif /* CONFIG_IWLEGACY_DEBUG */
3018
3019 static struct il_link_quality_cmd *
3020 il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id)
3021 {
3022 int i, r;
3023 struct il_link_quality_cmd *link_cmd;
3024 u32 rate_flags = 0;
3025 __le32 rate_n_flags;
3026
3027 link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL);
3028 if (!link_cmd) {
3029 IL_ERR("Unable to allocate memory for LQ cmd.\n");
3030 return NULL;
3031 }
3032 /* Set up the rate scaling to start at selected rate, fall back
3033 * all the way down to 1M in IEEE order, and then spin on 1M */
3034 if (il->band == NL80211_BAND_5GHZ)
3035 r = RATE_6M_IDX;
3036 else
3037 r = RATE_1M_IDX;
3038
3039 if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE)
3040 rate_flags |= RATE_MCS_CCK_MSK;
3041
3042 rate_flags |=
3043 il4965_first_antenna(il->hw_params.
3044 valid_tx_ant) << RATE_MCS_ANT_POS;
3045 rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags);
3046 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
3047 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
3048
3049 link_cmd->general_params.single_stream_ant_msk =
3050 il4965_first_antenna(il->hw_params.valid_tx_ant);
3051
3052 link_cmd->general_params.dual_stream_ant_msk =
3053 il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params.
3054 valid_tx_ant);
3055 if (!link_cmd->general_params.dual_stream_ant_msk) {
3056 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
3057 } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) {
3058 link_cmd->general_params.dual_stream_ant_msk =
3059 il->hw_params.valid_tx_ant;
3060 }
3061
3062 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
3063 link_cmd->agg_params.agg_time_limit =
3064 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
3065
3066 link_cmd->sta_id = sta_id;
3067
3068 return link_cmd;
3069 }
3070
3071 /*
3072 * il4965_add_bssid_station - Add the special IBSS BSSID station
3073 *
3074 * Function sleeps.
3075 */
3076 int
3077 il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r)
3078 {
3079 int ret;
3080 u8 sta_id;
3081 struct il_link_quality_cmd *link_cmd;
3082 unsigned long flags;
3083
3084 if (sta_id_r)
3085 *sta_id_r = IL_INVALID_STATION;
3086
3087 ret = il_add_station_common(il, addr, 0, NULL, &sta_id);
3088 if (ret) {
3089 IL_ERR("Unable to add station %pM\n", addr);
3090 return ret;
3091 }
3092
3093 if (sta_id_r)
3094 *sta_id_r = sta_id;
3095
3096 spin_lock_irqsave(&il->sta_lock, flags);
3097 il->stations[sta_id].used |= IL_STA_LOCAL;
3098 spin_unlock_irqrestore(&il->sta_lock, flags);
3099
3100 /* Set up default rate scaling table in device's station table */
3101 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3102 if (!link_cmd) {
3103 IL_ERR("Unable to initialize rate scaling for station %pM.\n",
3104 addr);
3105 return -ENOMEM;
3106 }
3107
3108 ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true);
3109 if (ret)
3110 IL_ERR("Link quality command failed (%d)\n", ret);
3111
3112 spin_lock_irqsave(&il->sta_lock, flags);
3113 il->stations[sta_id].lq = link_cmd;
3114 spin_unlock_irqrestore(&il->sta_lock, flags);
3115
3116 return 0;
3117 }
3118
3119 static int
3120 il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty)
3121 {
3122 int i;
3123 u8 buff[sizeof(struct il_wep_cmd) +
3124 sizeof(struct il_wep_key) * WEP_KEYS_MAX];
3125 struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff;
3126 size_t cmd_size = sizeof(struct il_wep_cmd);
3127 struct il_host_cmd cmd = {
3128 .id = C_WEPKEY,
3129 .data = wep_cmd,
3130 .flags = CMD_SYNC,
3131 };
3132 bool not_empty = false;
3133
3134 might_sleep();
3135
3136 memset(wep_cmd, 0,
3137 cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX));
3138
3139 for (i = 0; i < WEP_KEYS_MAX; i++) {
3140 u8 key_size = il->_4965.wep_keys[i].key_size;
3141
3142 wep_cmd->key[i].key_idx = i;
3143 if (key_size) {
3144 wep_cmd->key[i].key_offset = i;
3145 not_empty = true;
3146 } else
3147 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
3148
3149 wep_cmd->key[i].key_size = key_size;
3150 memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size);
3151 }
3152
3153 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
3154 wep_cmd->num_keys = WEP_KEYS_MAX;
3155
3156 cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX;
3157 cmd.len = cmd_size;
3158
3159 if (not_empty || send_if_empty)
3160 return il_send_cmd(il, &cmd);
3161 else
3162 return 0;
3163 }
3164
3165 int
3166 il4965_restore_default_wep_keys(struct il_priv *il)
3167 {
3168 lockdep_assert_held(&il->mutex);
3169
3170 return il4965_static_wepkey_cmd(il, false);
3171 }
3172
3173 int
3174 il4965_remove_default_wep_key(struct il_priv *il,
3175 struct ieee80211_key_conf *keyconf)
3176 {
3177 int ret;
3178 int idx = keyconf->keyidx;
3179
3180 lockdep_assert_held(&il->mutex);
3181
3182 D_WEP("Removing default WEP key: idx=%d\n", idx);
3183
3184 memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key));
3185 if (il_is_rfkill(il)) {
3186 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n");
3187 /* but keys in device are clear anyway so return success */
3188 return 0;
3189 }
3190 ret = il4965_static_wepkey_cmd(il, 1);
3191 D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret);
3192
3193 return ret;
3194 }
3195
3196 int
3197 il4965_set_default_wep_key(struct il_priv *il,
3198 struct ieee80211_key_conf *keyconf)
3199 {
3200 int ret;
3201 int len = keyconf->keylen;
3202 int idx = keyconf->keyidx;
3203
3204 lockdep_assert_held(&il->mutex);
3205
3206 if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) {
3207 D_WEP("Bad WEP key length %d\n", keyconf->keylen);
3208 return -EINVAL;
3209 }
3210
3211 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3212 keyconf->hw_key_idx = HW_KEY_DEFAULT;
3213 il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher;
3214
3215 il->_4965.wep_keys[idx].key_size = len;
3216 memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len);
3217
3218 ret = il4965_static_wepkey_cmd(il, false);
3219
3220 D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret);
3221 return ret;
3222 }
3223
3224 static int
3225 il4965_set_wep_dynamic_key_info(struct il_priv *il,
3226 struct ieee80211_key_conf *keyconf, u8 sta_id)
3227 {
3228 unsigned long flags;
3229 __le16 key_flags = 0;
3230 struct il_addsta_cmd sta_cmd;
3231
3232 lockdep_assert_held(&il->mutex);
3233
3234 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3235
3236 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
3237 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3238 key_flags &= ~STA_KEY_FLG_INVALID;
3239
3240 if (keyconf->keylen == WEP_KEY_LEN_128)
3241 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
3242
3243 if (sta_id == il->hw_params.bcast_id)
3244 key_flags |= STA_KEY_MULTICAST_MSK;
3245
3246 spin_lock_irqsave(&il->sta_lock, flags);
3247
3248 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3249 il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3250 il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
3251
3252 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3253
3254 memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key,
3255 keyconf->keylen);
3256
3257 if ((il->stations[sta_id].sta.key.
3258 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3259 il->stations[sta_id].sta.key.key_offset =
3260 il_get_free_ucode_key_idx(il);
3261 /* else, we are overriding an existing key => no need to allocated room
3262 * in uCode. */
3263
3264 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3265 "no space for a new key");
3266
3267 il->stations[sta_id].sta.key.key_flags = key_flags;
3268 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3269 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3270
3271 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3272 sizeof(struct il_addsta_cmd));
3273 spin_unlock_irqrestore(&il->sta_lock, flags);
3274
3275 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3276 }
3277
3278 static int
3279 il4965_set_ccmp_dynamic_key_info(struct il_priv *il,
3280 struct ieee80211_key_conf *keyconf, u8 sta_id)
3281 {
3282 unsigned long flags;
3283 __le16 key_flags = 0;
3284 struct il_addsta_cmd sta_cmd;
3285
3286 lockdep_assert_held(&il->mutex);
3287
3288 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
3289 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3290 key_flags &= ~STA_KEY_FLG_INVALID;
3291
3292 if (sta_id == il->hw_params.bcast_id)
3293 key_flags |= STA_KEY_MULTICAST_MSK;
3294
3295 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3296
3297 spin_lock_irqsave(&il->sta_lock, flags);
3298 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3299 il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3300
3301 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3302
3303 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
3304
3305 if ((il->stations[sta_id].sta.key.
3306 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3307 il->stations[sta_id].sta.key.key_offset =
3308 il_get_free_ucode_key_idx(il);
3309 /* else, we are overriding an existing key => no need to allocated room
3310 * in uCode. */
3311
3312 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3313 "no space for a new key");
3314
3315 il->stations[sta_id].sta.key.key_flags = key_flags;
3316 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3317 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3318
3319 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3320 sizeof(struct il_addsta_cmd));
3321 spin_unlock_irqrestore(&il->sta_lock, flags);
3322
3323 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3324 }
3325
3326 static int
3327 il4965_set_tkip_dynamic_key_info(struct il_priv *il,
3328 struct ieee80211_key_conf *keyconf, u8 sta_id)
3329 {
3330 unsigned long flags;
3331 __le16 key_flags = 0;
3332
3333 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
3334 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3335 key_flags &= ~STA_KEY_FLG_INVALID;
3336
3337 if (sta_id == il->hw_params.bcast_id)
3338 key_flags |= STA_KEY_MULTICAST_MSK;
3339
3340 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3341 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
3342
3343 spin_lock_irqsave(&il->sta_lock, flags);
3344
3345 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3346 il->stations[sta_id].keyinfo.keylen = 16;
3347
3348 if ((il->stations[sta_id].sta.key.
3349 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3350 il->stations[sta_id].sta.key.key_offset =
3351 il_get_free_ucode_key_idx(il);
3352 /* else, we are overriding an existing key => no need to allocated room
3353 * in uCode. */
3354
3355 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3356 "no space for a new key");
3357
3358 il->stations[sta_id].sta.key.key_flags = key_flags;
3359
3360 /* This copy is acutally not needed: we get the key with each TX */
3361 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16);
3362
3363 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16);
3364
3365 spin_unlock_irqrestore(&il->sta_lock, flags);
3366
3367 return 0;
3368 }
3369
3370 void
3371 il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3372 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
3373 {
3374 u8 sta_id;
3375 unsigned long flags;
3376 int i;
3377
3378 if (il_scan_cancel(il)) {
3379 /* cancel scan failed, just live w/ bad key and rely
3380 briefly on SW decryption */
3381 return;
3382 }
3383
3384 sta_id = il_sta_id_or_broadcast(il, sta);
3385 if (sta_id == IL_INVALID_STATION)
3386 return;
3387
3388 spin_lock_irqsave(&il->sta_lock, flags);
3389
3390 il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
3391
3392 for (i = 0; i < 5; i++)
3393 il->stations[sta_id].sta.key.tkip_rx_ttak[i] =
3394 cpu_to_le16(phase1key[i]);
3395
3396 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3397 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3398
3399 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3400
3401 spin_unlock_irqrestore(&il->sta_lock, flags);
3402 }
3403
3404 int
3405 il4965_remove_dynamic_key(struct il_priv *il,
3406 struct ieee80211_key_conf *keyconf, u8 sta_id)
3407 {
3408 unsigned long flags;
3409 u16 key_flags;
3410 u8 keyidx;
3411 struct il_addsta_cmd sta_cmd;
3412
3413 lockdep_assert_held(&il->mutex);
3414
3415 il->_4965.key_mapping_keys--;
3416
3417 spin_lock_irqsave(&il->sta_lock, flags);
3418 key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags);
3419 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
3420
3421 D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id);
3422
3423 if (keyconf->keyidx != keyidx) {
3424 /* We need to remove a key with idx different that the one
3425 * in the uCode. This means that the key we need to remove has
3426 * been replaced by another one with different idx.
3427 * Don't do anything and return ok
3428 */
3429 spin_unlock_irqrestore(&il->sta_lock, flags);
3430 return 0;
3431 }
3432
3433 if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) {
3434 IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx,
3435 key_flags);
3436 spin_unlock_irqrestore(&il->sta_lock, flags);
3437 return 0;
3438 }
3439
3440 if (!test_and_clear_bit
3441 (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table))
3442 IL_ERR("idx %d not used in uCode key table.\n",
3443 il->stations[sta_id].sta.key.key_offset);
3444 memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
3445 memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
3446 il->stations[sta_id].sta.key.key_flags =
3447 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
3448 il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx;
3449 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3450 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3451
3452 if (il_is_rfkill(il)) {
3453 D_WEP
3454 ("Not sending C_ADD_STA command because RFKILL enabled.\n");
3455 spin_unlock_irqrestore(&il->sta_lock, flags);
3456 return 0;
3457 }
3458 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3459 sizeof(struct il_addsta_cmd));
3460 spin_unlock_irqrestore(&il->sta_lock, flags);
3461
3462 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3463 }
3464
3465 int
3466 il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3467 u8 sta_id)
3468 {
3469 int ret;
3470
3471 lockdep_assert_held(&il->mutex);
3472
3473 il->_4965.key_mapping_keys++;
3474 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
3475
3476 switch (keyconf->cipher) {
3477 case WLAN_CIPHER_SUITE_CCMP:
3478 ret =
3479 il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
3480 break;
3481 case WLAN_CIPHER_SUITE_TKIP:
3482 ret =
3483 il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id);
3484 break;
3485 case WLAN_CIPHER_SUITE_WEP40:
3486 case WLAN_CIPHER_SUITE_WEP104:
3487 ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id);
3488 break;
3489 default:
3490 IL_ERR("Unknown alg: %s cipher = %x\n", __func__,
3491 keyconf->cipher);
3492 ret = -EINVAL;
3493 }
3494
3495 D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n",
3496 keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
3497
3498 return ret;
3499 }
3500
3501 /*
3502 * il4965_alloc_bcast_station - add broadcast station into driver's station table.
3503 *
3504 * This adds the broadcast station into the driver's station table
3505 * and marks it driver active, so that it will be restored to the
3506 * device at the next best time.
3507 */
3508 int
3509 il4965_alloc_bcast_station(struct il_priv *il)
3510 {
3511 struct il_link_quality_cmd *link_cmd;
3512 unsigned long flags;
3513 u8 sta_id;
3514
3515 spin_lock_irqsave(&il->sta_lock, flags);
3516 sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
3517 if (sta_id == IL_INVALID_STATION) {
3518 IL_ERR("Unable to prepare broadcast station\n");
3519 spin_unlock_irqrestore(&il->sta_lock, flags);
3520
3521 return -EINVAL;
3522 }
3523
3524 il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
3525 il->stations[sta_id].used |= IL_STA_BCAST;
3526 spin_unlock_irqrestore(&il->sta_lock, flags);
3527
3528 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3529 if (!link_cmd) {
3530 IL_ERR
3531 ("Unable to initialize rate scaling for bcast station.\n");
3532 return -ENOMEM;
3533 }
3534
3535 spin_lock_irqsave(&il->sta_lock, flags);
3536 il->stations[sta_id].lq = link_cmd;
3537 spin_unlock_irqrestore(&il->sta_lock, flags);
3538
3539 return 0;
3540 }
3541
3542 /*
3543 * il4965_update_bcast_station - update broadcast station's LQ command
3544 *
3545 * Only used by iwl4965. Placed here to have all bcast station management
3546 * code together.
3547 */
3548 static int
3549 il4965_update_bcast_station(struct il_priv *il)
3550 {
3551 unsigned long flags;
3552 struct il_link_quality_cmd *link_cmd;
3553 u8 sta_id = il->hw_params.bcast_id;
3554
3555 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3556 if (!link_cmd) {
3557 IL_ERR("Unable to initialize rate scaling for bcast sta.\n");
3558 return -ENOMEM;
3559 }
3560
3561 spin_lock_irqsave(&il->sta_lock, flags);
3562 if (il->stations[sta_id].lq)
3563 kfree(il->stations[sta_id].lq);
3564 else
3565 D_INFO("Bcast sta rate scaling has not been initialized.\n");
3566 il->stations[sta_id].lq = link_cmd;
3567 spin_unlock_irqrestore(&il->sta_lock, flags);
3568
3569 return 0;
3570 }
3571
3572 int
3573 il4965_update_bcast_stations(struct il_priv *il)
3574 {
3575 return il4965_update_bcast_station(il);
3576 }
3577
3578 /*
3579 * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
3580 */
3581 int
3582 il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid)
3583 {
3584 unsigned long flags;
3585 struct il_addsta_cmd sta_cmd;
3586
3587 lockdep_assert_held(&il->mutex);
3588
3589 /* Remove "disable" flag, to enable Tx for this TID */
3590 spin_lock_irqsave(&il->sta_lock, flags);
3591 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
3592 il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
3593 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3594 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3595 sizeof(struct il_addsta_cmd));
3596 spin_unlock_irqrestore(&il->sta_lock, flags);
3597
3598 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3599 }
3600
3601 int
3602 il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid,
3603 u16 ssn)
3604 {
3605 unsigned long flags;
3606 int sta_id;
3607 struct il_addsta_cmd sta_cmd;
3608
3609 lockdep_assert_held(&il->mutex);
3610
3611 sta_id = il_sta_id(sta);
3612 if (sta_id == IL_INVALID_STATION)
3613 return -ENXIO;
3614
3615 spin_lock_irqsave(&il->sta_lock, flags);
3616 il->stations[sta_id].sta.station_flags_msk = 0;
3617 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3618 il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid;
3619 il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3620 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3621 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3622 sizeof(struct il_addsta_cmd));
3623 spin_unlock_irqrestore(&il->sta_lock, flags);
3624
3625 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3626 }
3627
3628 int
3629 il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid)
3630 {
3631 unsigned long flags;
3632 int sta_id;
3633 struct il_addsta_cmd sta_cmd;
3634
3635 lockdep_assert_held(&il->mutex);
3636
3637 sta_id = il_sta_id(sta);
3638 if (sta_id == IL_INVALID_STATION) {
3639 IL_ERR("Invalid station for AGG tid %d\n", tid);
3640 return -ENXIO;
3641 }
3642
3643 spin_lock_irqsave(&il->sta_lock, flags);
3644 il->stations[sta_id].sta.station_flags_msk = 0;
3645 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3646 il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid;
3647 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3648 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3649 sizeof(struct il_addsta_cmd));
3650 spin_unlock_irqrestore(&il->sta_lock, flags);
3651
3652 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3653 }
3654
3655 void
3656 il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt)
3657 {
3658 unsigned long flags;
3659
3660 spin_lock_irqsave(&il->sta_lock, flags);
3661 il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
3662 il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3663 il->stations[sta_id].sta.sta.modify_mask =
3664 STA_MODIFY_SLEEP_TX_COUNT_MSK;
3665 il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
3666 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3667 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3668 spin_unlock_irqrestore(&il->sta_lock, flags);
3669
3670 }
3671
3672 void
3673 il4965_update_chain_flags(struct il_priv *il)
3674 {
3675 if (il->ops->set_rxon_chain) {
3676 il->ops->set_rxon_chain(il);
3677 if (il->active.rx_chain != il->staging.rx_chain)
3678 il_commit_rxon(il);
3679 }
3680 }
3681
3682 static void
3683 il4965_clear_free_frames(struct il_priv *il)
3684 {
3685 struct list_head *element;
3686
3687 D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
3688
3689 while (!list_empty(&il->free_frames)) {
3690 element = il->free_frames.next;
3691 list_del(element);
3692 kfree(list_entry(element, struct il_frame, list));
3693 il->frames_count--;
3694 }
3695
3696 if (il->frames_count) {
3697 IL_WARN("%d frames still in use. Did we lose one?\n",
3698 il->frames_count);
3699 il->frames_count = 0;
3700 }
3701 }
3702
3703 static struct il_frame *
3704 il4965_get_free_frame(struct il_priv *il)
3705 {
3706 struct il_frame *frame;
3707 struct list_head *element;
3708 if (list_empty(&il->free_frames)) {
3709 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
3710 if (!frame) {
3711 IL_ERR("Could not allocate frame!\n");
3712 return NULL;
3713 }
3714
3715 il->frames_count++;
3716 return frame;
3717 }
3718
3719 element = il->free_frames.next;
3720 list_del(element);
3721 return list_entry(element, struct il_frame, list);
3722 }
3723
3724 static void
3725 il4965_free_frame(struct il_priv *il, struct il_frame *frame)
3726 {
3727 memset(frame, 0, sizeof(*frame));
3728 list_add(&frame->list, &il->free_frames);
3729 }
3730
3731 static u32
3732 il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
3733 int left)
3734 {
3735 lockdep_assert_held(&il->mutex);
3736
3737 if (!il->beacon_skb)
3738 return 0;
3739
3740 if (il->beacon_skb->len > left)
3741 return 0;
3742
3743 memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
3744
3745 return il->beacon_skb->len;
3746 }
3747
3748 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
3749 static void
3750 il4965_set_beacon_tim(struct il_priv *il,
3751 struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon,
3752 u32 frame_size)
3753 {
3754 u16 tim_idx;
3755 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
3756
3757 /*
3758 * The idx is relative to frame start but we start looking at the
3759 * variable-length part of the beacon.
3760 */
3761 tim_idx = mgmt->u.beacon.variable - beacon;
3762
3763 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
3764 while ((tim_idx < (frame_size - 2)) &&
3765 (beacon[tim_idx] != WLAN_EID_TIM))
3766 tim_idx += beacon[tim_idx + 1] + 2;
3767
3768 /* If TIM field was found, set variables */
3769 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
3770 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
3771 tx_beacon_cmd->tim_size = beacon[tim_idx + 1];
3772 } else
3773 IL_WARN("Unable to find TIM Element in beacon\n");
3774 }
3775
3776 static unsigned int
3777 il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame)
3778 {
3779 struct il_tx_beacon_cmd *tx_beacon_cmd;
3780 u32 frame_size;
3781 u32 rate_flags;
3782 u32 rate;
3783 /*
3784 * We have to set up the TX command, the TX Beacon command, and the
3785 * beacon contents.
3786 */
3787
3788 lockdep_assert_held(&il->mutex);
3789
3790 if (!il->beacon_enabled) {
3791 IL_ERR("Trying to build beacon without beaconing enabled\n");
3792 return 0;
3793 }
3794
3795 /* Initialize memory */
3796 tx_beacon_cmd = &frame->u.beacon;
3797 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
3798
3799 /* Set up TX beacon contents */
3800 frame_size =
3801 il4965_fill_beacon_frame(il, tx_beacon_cmd->frame,
3802 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
3803 if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
3804 return 0;
3805 if (!frame_size)
3806 return 0;
3807
3808 /* Set up TX command fields */
3809 tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size);
3810 tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id;
3811 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3812 tx_beacon_cmd->tx.tx_flags =
3813 TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK |
3814 TX_CMD_FLG_STA_RATE_MSK;
3815
3816 /* Set up TX beacon command fields */
3817 il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame,
3818 frame_size);
3819
3820 /* Set up packet rate and flags */
3821 rate = il_get_lowest_plcp(il);
3822 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
3823 rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
3824 if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE))
3825 rate_flags |= RATE_MCS_CCK_MSK;
3826 tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags);
3827
3828 return sizeof(*tx_beacon_cmd) + frame_size;
3829 }
3830
3831 int
3832 il4965_send_beacon_cmd(struct il_priv *il)
3833 {
3834 struct il_frame *frame;
3835 unsigned int frame_size;
3836 int rc;
3837
3838 frame = il4965_get_free_frame(il);
3839 if (!frame) {
3840 IL_ERR("Could not obtain free frame buffer for beacon "
3841 "command.\n");
3842 return -ENOMEM;
3843 }
3844
3845 frame_size = il4965_hw_get_beacon_cmd(il, frame);
3846 if (!frame_size) {
3847 IL_ERR("Error configuring the beacon command\n");
3848 il4965_free_frame(il, frame);
3849 return -EINVAL;
3850 }
3851
3852 rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
3853
3854 il4965_free_frame(il, frame);
3855
3856 return rc;
3857 }
3858
3859 static inline dma_addr_t
3860 il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx)
3861 {
3862 struct il_tfd_tb *tb = &tfd->tbs[idx];
3863
3864 dma_addr_t addr = get_unaligned_le32(&tb->lo);
3865 if (sizeof(dma_addr_t) > sizeof(u32))
3866 addr |=
3867 ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) <<
3868 16;
3869
3870 return addr;
3871 }
3872
3873 static inline u16
3874 il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx)
3875 {
3876 struct il_tfd_tb *tb = &tfd->tbs[idx];
3877
3878 return le16_to_cpu(tb->hi_n_len) >> 4;
3879 }
3880
3881 static inline void
3882 il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len)
3883 {
3884 struct il_tfd_tb *tb = &tfd->tbs[idx];
3885 u16 hi_n_len = len << 4;
3886
3887 put_unaligned_le32(addr, &tb->lo);
3888 if (sizeof(dma_addr_t) > sizeof(u32))
3889 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
3890
3891 tb->hi_n_len = cpu_to_le16(hi_n_len);
3892
3893 tfd->num_tbs = idx + 1;
3894 }
3895
3896 static inline u8
3897 il4965_tfd_get_num_tbs(struct il_tfd *tfd)
3898 {
3899 return tfd->num_tbs & 0x1f;
3900 }
3901
3902 /*
3903 * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
3904 *
3905 * Does NOT advance any TFD circular buffer read/write idxes
3906 * Does NOT free the TFD itself (which is within circular buffer)
3907 */
3908 void
3909 il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq)
3910 {
3911 struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds;
3912 struct il_tfd *tfd;
3913 struct pci_dev *dev = il->pci_dev;
3914 int idx = txq->q.read_ptr;
3915 int i;
3916 int num_tbs;
3917
3918 tfd = &tfd_tmp[idx];
3919
3920 /* Sanity check on number of chunks */
3921 num_tbs = il4965_tfd_get_num_tbs(tfd);
3922
3923 if (num_tbs >= IL_NUM_OF_TBS) {
3924 IL_ERR("Too many chunks: %i\n", num_tbs);
3925 /* @todo issue fatal error, it is quite serious situation */
3926 return;
3927 }
3928
3929 /* Unmap tx_cmd */
3930 if (num_tbs)
3931 dma_unmap_single(&dev->dev,
3932 dma_unmap_addr(&txq->meta[idx], mapping),
3933 dma_unmap_len(&txq->meta[idx], len),
3934 DMA_BIDIRECTIONAL);
3935
3936 /* Unmap chunks, if any. */
3937 for (i = 1; i < num_tbs; i++)
3938 dma_unmap_single(&dev->dev, il4965_tfd_tb_get_addr(tfd, i),
3939 il4965_tfd_tb_get_len(tfd, i), DMA_TO_DEVICE);
3940
3941 /* free SKB */
3942 if (txq->skbs) {
3943 struct sk_buff *skb = txq->skbs[txq->q.read_ptr];
3944
3945 /* can be called from irqs-disabled context */
3946 if (skb) {
3947 dev_kfree_skb_any(skb);
3948 txq->skbs[txq->q.read_ptr] = NULL;
3949 }
3950 }
3951 }
3952
3953 int
3954 il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq,
3955 dma_addr_t addr, u16 len, u8 reset, u8 pad)
3956 {
3957 struct il_queue *q;
3958 struct il_tfd *tfd, *tfd_tmp;
3959 u32 num_tbs;
3960
3961 q = &txq->q;
3962 tfd_tmp = (struct il_tfd *)txq->tfds;
3963 tfd = &tfd_tmp[q->write_ptr];
3964
3965 if (reset)
3966 memset(tfd, 0, sizeof(*tfd));
3967
3968 num_tbs = il4965_tfd_get_num_tbs(tfd);
3969
3970 /* Each TFD can point to a maximum 20 Tx buffers */
3971 if (num_tbs >= IL_NUM_OF_TBS) {
3972 IL_ERR("Error can not send more than %d chunks\n",
3973 IL_NUM_OF_TBS);
3974 return -EINVAL;
3975 }
3976
3977 BUG_ON(addr & ~DMA_BIT_MASK(36));
3978 if (unlikely(addr & ~IL_TX_DMA_MASK))
3979 IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr);
3980
3981 il4965_tfd_set_tb(tfd, num_tbs, addr, len);
3982
3983 return 0;
3984 }
3985
3986 /*
3987 * Tell nic where to find circular buffer of Tx Frame Descriptors for
3988 * given Tx queue, and enable the DMA channel used for that queue.
3989 *
3990 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
3991 * channels supported in hardware.
3992 */
3993 int
3994 il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq)
3995 {
3996 int txq_id = txq->q.id;
3997
3998 /* Circular buffer (TFD queue in DRAM) physical base address */
3999 il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8);
4000
4001 return 0;
4002 }
4003
4004 /******************************************************************************
4005 *
4006 * Generic RX handler implementations
4007 *
4008 ******************************************************************************/
4009 static void
4010 il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
4011 {
4012 struct il_rx_pkt *pkt = rxb_addr(rxb);
4013 struct il_alive_resp *palive;
4014 struct delayed_work *pwork;
4015
4016 palive = &pkt->u.alive_frame;
4017
4018 D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
4019 palive->is_valid, palive->ver_type, palive->ver_subtype);
4020
4021 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
4022 D_INFO("Initialization Alive received.\n");
4023 memcpy(&il->card_alive_init, &pkt->u.raw,
4024 sizeof(struct il_init_alive_resp));
4025 pwork = &il->init_alive_start;
4026 } else {
4027 D_INFO("Runtime Alive received.\n");
4028 memcpy(&il->card_alive, &pkt->u.alive_frame,
4029 sizeof(struct il_alive_resp));
4030 pwork = &il->alive_start;
4031 }
4032
4033 /* We delay the ALIVE response by 5ms to
4034 * give the HW RF Kill time to activate... */
4035 if (palive->is_valid == UCODE_VALID_OK)
4036 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
4037 else
4038 IL_WARN("uCode did not respond OK.\n");
4039 }
4040
4041 /*
4042 * il4965_bg_stats_periodic - Timer callback to queue stats
4043 *
4044 * This callback is provided in order to send a stats request.
4045 *
4046 * This timer function is continually reset to execute within
4047 * 60 seconds since the last N_STATS was received. We need to
4048 * ensure we receive the stats in order to update the temperature
4049 * used for calibrating the TXPOWER.
4050 */
4051 static void
4052 il4965_bg_stats_periodic(struct timer_list *t)
4053 {
4054 struct il_priv *il = from_timer(il, t, stats_periodic);
4055
4056 if (test_bit(S_EXIT_PENDING, &il->status))
4057 return;
4058
4059 /* dont send host command if rf-kill is on */
4060 if (!il_is_ready_rf(il))
4061 return;
4062
4063 il_send_stats_request(il, CMD_ASYNC, false);
4064 }
4065
4066 static void
4067 il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
4068 {
4069 struct il_rx_pkt *pkt = rxb_addr(rxb);
4070 struct il4965_beacon_notif *beacon =
4071 (struct il4965_beacon_notif *)pkt->u.raw;
4072 #ifdef CONFIG_IWLEGACY_DEBUG
4073 u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
4074
4075 D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n",
4076 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
4077 beacon->beacon_notify_hdr.failure_frame,
4078 le32_to_cpu(beacon->ibss_mgr_status),
4079 le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
4080 #endif
4081 il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
4082 }
4083
4084 static void
4085 il4965_perform_ct_kill_task(struct il_priv *il)
4086 {
4087 unsigned long flags;
4088
4089 D_POWER("Stop all queues\n");
4090
4091 if (il->mac80211_registered)
4092 ieee80211_stop_queues(il->hw);
4093
4094 _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4095 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4096 _il_rd(il, CSR_UCODE_DRV_GP1);
4097
4098 spin_lock_irqsave(&il->reg_lock, flags);
4099 if (likely(_il_grab_nic_access(il)))
4100 _il_release_nic_access(il);
4101 spin_unlock_irqrestore(&il->reg_lock, flags);
4102 }
4103
4104 /* Handle notification from uCode that card's power state is changing
4105 * due to software, hardware, or critical temperature RFKILL */
4106 static void
4107 il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
4108 {
4109 struct il_rx_pkt *pkt = rxb_addr(rxb);
4110 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4111 unsigned long status = il->status;
4112
4113 D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n",
4114 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4115 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
4116 (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached");
4117
4118 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) {
4119
4120 _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4121 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4122
4123 il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4124
4125 if (!(flags & RXON_CARD_DISABLED)) {
4126 _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
4127 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4128 il_wr(il, HBUS_TARG_MBX_C,
4129 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4130 }
4131 }
4132
4133 if (flags & CT_CARD_DISABLED)
4134 il4965_perform_ct_kill_task(il);
4135
4136 if (flags & HW_CARD_DISABLED)
4137 set_bit(S_RFKILL, &il->status);
4138 else
4139 clear_bit(S_RFKILL, &il->status);
4140
4141 if (!(flags & RXON_CARD_DISABLED))
4142 il_scan_cancel(il);
4143
4144 if ((test_bit(S_RFKILL, &status) !=
4145 test_bit(S_RFKILL, &il->status)))
4146 wiphy_rfkill_set_hw_state(il->hw->wiphy,
4147 test_bit(S_RFKILL, &il->status));
4148 else
4149 wake_up(&il->wait_command_queue);
4150 }
4151
4152 /*
4153 * il4965_setup_handlers - Initialize Rx handler callbacks
4154 *
4155 * Setup the RX handlers for each of the reply types sent from the uCode
4156 * to the host.
4157 *
4158 * This function chains into the hardware specific files for them to setup
4159 * any hardware specific handlers as well.
4160 */
4161 static void
4162 il4965_setup_handlers(struct il_priv *il)
4163 {
4164 il->handlers[N_ALIVE] = il4965_hdl_alive;
4165 il->handlers[N_ERROR] = il_hdl_error;
4166 il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
4167 il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
4168 il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
4169 il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
4170 il->handlers[N_BEACON] = il4965_hdl_beacon;
4171
4172 /*
4173 * The same handler is used for both the REPLY to a discrete
4174 * stats request from the host as well as for the periodic
4175 * stats notifications (after received beacons) from the uCode.
4176 */
4177 il->handlers[C_STATS] = il4965_hdl_c_stats;
4178 il->handlers[N_STATS] = il4965_hdl_stats;
4179
4180 il_setup_rx_scan_handlers(il);
4181
4182 /* status change handler */
4183 il->handlers[N_CARD_STATE] = il4965_hdl_card_state;
4184
4185 il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon;
4186 /* Rx handlers */
4187 il->handlers[N_RX_PHY] = il4965_hdl_rx_phy;
4188 il->handlers[N_RX_MPDU] = il4965_hdl_rx;
4189 il->handlers[N_RX] = il4965_hdl_rx;
4190 /* block ack */
4191 il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba;
4192 /* Tx response */
4193 il->handlers[C_TX] = il4965_hdl_tx;
4194 }
4195
4196 /*
4197 * il4965_rx_handle - Main entry function for receiving responses from uCode
4198 *
4199 * Uses the il->handlers callback function array to invoke
4200 * the appropriate handlers, including command responses,
4201 * frame-received notifications, and other notifications.
4202 */
4203 void
4204 il4965_rx_handle(struct il_priv *il)
4205 {
4206 struct il_rx_buf *rxb;
4207 struct il_rx_pkt *pkt;
4208 struct il_rx_queue *rxq = &il->rxq;
4209 u32 r, i;
4210 int reclaim;
4211 unsigned long flags;
4212 u8 fill_rx = 0;
4213 u32 count = 8;
4214 int total_empty;
4215
4216 /* uCode's read idx (stored in shared DRAM) indicates the last Rx
4217 * buffer that the driver may process (last buffer filled by ucode). */
4218 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
4219 i = rxq->read;
4220
4221 /* Rx interrupt, but nothing sent from uCode */
4222 if (i == r)
4223 D_RX("r = %d, i = %d\n", r, i);
4224
4225 /* calculate total frames need to be restock after handling RX */
4226 total_empty = r - rxq->write_actual;
4227 if (total_empty < 0)
4228 total_empty += RX_QUEUE_SIZE;
4229
4230 if (total_empty > (RX_QUEUE_SIZE / 2))
4231 fill_rx = 1;
4232
4233 while (i != r) {
4234 rxb = rxq->queue[i];
4235
4236 /* If an RXB doesn't have a Rx queue slot associated with it,
4237 * then a bug has been introduced in the queue refilling
4238 * routines -- catch it here */
4239 BUG_ON(rxb == NULL);
4240
4241 rxq->queue[i] = NULL;
4242
4243 dma_unmap_page(&il->pci_dev->dev, rxb->page_dma,
4244 PAGE_SIZE << il->hw_params.rx_page_order,
4245 DMA_FROM_DEVICE);
4246 pkt = rxb_addr(rxb);
4247 reclaim = il_need_reclaim(il, pkt);
4248
4249 /* Based on type of command response or notification,
4250 * handle those that need handling via function in
4251 * handlers table. See il4965_setup_handlers() */
4252 if (il->handlers[pkt->hdr.cmd]) {
4253 D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
4254 il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4255 il->isr_stats.handlers[pkt->hdr.cmd]++;
4256 il->handlers[pkt->hdr.cmd] (il, rxb);
4257 } else {
4258 /* No handling needed */
4259 D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
4260 i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4261 }
4262
4263 /*
4264 * XXX: After here, we should always check rxb->page
4265 * against NULL before touching it or its virtual
4266 * memory (pkt). Because some handler might have
4267 * already taken or freed the pages.
4268 */
4269
4270 if (reclaim) {
4271 /* Invoke any callbacks, transfer the buffer to caller,
4272 * and fire off the (possibly) blocking il_send_cmd()
4273 * as we reclaim the driver command queue */
4274 if (rxb->page)
4275 il_tx_cmd_complete(il, rxb);
4276 else
4277 IL_WARN("Claim null rxb?\n");
4278 }
4279
4280 /* Reuse the page if possible. For notification packets and
4281 * SKBs that fail to Rx correctly, add them back into the
4282 * rx_free list for reuse later. */
4283 spin_lock_irqsave(&rxq->lock, flags);
4284 if (rxb->page != NULL) {
4285 rxb->page_dma =
4286 dma_map_page(&il->pci_dev->dev, rxb->page, 0,
4287 PAGE_SIZE << il->hw_params.rx_page_order,
4288 DMA_FROM_DEVICE);
4289
4290 if (unlikely(dma_mapping_error(&il->pci_dev->dev,
4291 rxb->page_dma))) {
4292 __il_free_pages(il, rxb->page);
4293 rxb->page = NULL;
4294 list_add_tail(&rxb->list, &rxq->rx_used);
4295 } else {
4296 list_add_tail(&rxb->list, &rxq->rx_free);
4297 rxq->free_count++;
4298 }
4299 } else
4300 list_add_tail(&rxb->list, &rxq->rx_used);
4301
4302 spin_unlock_irqrestore(&rxq->lock, flags);
4303
4304 i = (i + 1) & RX_QUEUE_MASK;
4305 /* If there are a lot of unused frames,
4306 * restock the Rx queue so ucode wont assert. */
4307 if (fill_rx) {
4308 count++;
4309 if (count >= 8) {
4310 rxq->read = i;
4311 il4965_rx_replenish_now(il);
4312 count = 0;
4313 }
4314 }
4315 }
4316
4317 /* Backtrack one entry */
4318 rxq->read = i;
4319 if (fill_rx)
4320 il4965_rx_replenish_now(il);
4321 else
4322 il4965_rx_queue_restock(il);
4323 }
4324
4325 /* call this function to flush any scheduled tasklet */
4326 static inline void
4327 il4965_synchronize_irq(struct il_priv *il)
4328 {
4329 /* wait to make sure we flush pending tasklet */
4330 synchronize_irq(il->pci_dev->irq);
4331 tasklet_kill(&il->irq_tasklet);
4332 }
4333
4334 static void
4335 il4965_irq_tasklet(struct tasklet_struct *t)
4336 {
4337 struct il_priv *il = from_tasklet(il, t, irq_tasklet);
4338 u32 inta, handled = 0;
4339 u32 inta_fh;
4340 unsigned long flags;
4341 u32 i;
4342 #ifdef CONFIG_IWLEGACY_DEBUG
4343 u32 inta_mask;
4344 #endif
4345
4346 spin_lock_irqsave(&il->lock, flags);
4347
4348 /* Ack/clear/reset pending uCode interrupts.
4349 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4350 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4351 inta = _il_rd(il, CSR_INT);
4352 _il_wr(il, CSR_INT, inta);
4353
4354 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4355 * Any new interrupts that happen after this, either while we're
4356 * in this tasklet, or later, will show up in next ISR/tasklet. */
4357 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4358 _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
4359
4360 #ifdef CONFIG_IWLEGACY_DEBUG
4361 if (il_get_debug_level(il) & IL_DL_ISR) {
4362 /* just for debug */
4363 inta_mask = _il_rd(il, CSR_INT_MASK);
4364 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
4365 inta_mask, inta_fh);
4366 }
4367 #endif
4368
4369 spin_unlock_irqrestore(&il->lock, flags);
4370
4371 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4372 * atomic, make sure that inta covers all the interrupts that
4373 * we've discovered, even if FH interrupt came in just after
4374 * reading CSR_INT. */
4375 if (inta_fh & CSR49_FH_INT_RX_MASK)
4376 inta |= CSR_INT_BIT_FH_RX;
4377 if (inta_fh & CSR49_FH_INT_TX_MASK)
4378 inta |= CSR_INT_BIT_FH_TX;
4379
4380 /* Now service all interrupt bits discovered above. */
4381 if (inta & CSR_INT_BIT_HW_ERR) {
4382 IL_ERR("Hardware error detected. Restarting.\n");
4383
4384 /* Tell the device to stop sending interrupts */
4385 il_disable_interrupts(il);
4386
4387 il->isr_stats.hw++;
4388 il_irq_handle_error(il);
4389
4390 handled |= CSR_INT_BIT_HW_ERR;
4391
4392 return;
4393 }
4394 #ifdef CONFIG_IWLEGACY_DEBUG
4395 if (il_get_debug_level(il) & (IL_DL_ISR)) {
4396 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4397 if (inta & CSR_INT_BIT_SCD) {
4398 D_ISR("Scheduler finished to transmit "
4399 "the frame/frames.\n");
4400 il->isr_stats.sch++;
4401 }
4402
4403 /* Alive notification via Rx interrupt will do the real work */
4404 if (inta & CSR_INT_BIT_ALIVE) {
4405 D_ISR("Alive interrupt\n");
4406 il->isr_stats.alive++;
4407 }
4408 }
4409 #endif
4410 /* Safely ignore these bits for debug checks below */
4411 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4412
4413 /* HW RF KILL switch toggled */
4414 if (inta & CSR_INT_BIT_RF_KILL) {
4415 int hw_rf_kill = 0;
4416
4417 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4418 hw_rf_kill = 1;
4419
4420 IL_WARN("RF_KILL bit toggled to %s.\n",
4421 hw_rf_kill ? "disable radio" : "enable radio");
4422
4423 il->isr_stats.rfkill++;
4424
4425 /* driver only loads ucode once setting the interface up.
4426 * the driver allows loading the ucode even if the radio
4427 * is killed. Hence update the killswitch state here. The
4428 * rfkill handler will care about restarting if needed.
4429 */
4430 if (hw_rf_kill) {
4431 set_bit(S_RFKILL, &il->status);
4432 } else {
4433 clear_bit(S_RFKILL, &il->status);
4434 il_force_reset(il, true);
4435 }
4436 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill);
4437
4438 handled |= CSR_INT_BIT_RF_KILL;
4439 }
4440
4441 /* Chip got too hot and stopped itself */
4442 if (inta & CSR_INT_BIT_CT_KILL) {
4443 IL_ERR("Microcode CT kill error detected.\n");
4444 il->isr_stats.ctkill++;
4445 handled |= CSR_INT_BIT_CT_KILL;
4446 }
4447
4448 /* Error detected by uCode */
4449 if (inta & CSR_INT_BIT_SW_ERR) {
4450 IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n",
4451 inta);
4452 il->isr_stats.sw++;
4453 il_irq_handle_error(il);
4454 handled |= CSR_INT_BIT_SW_ERR;
4455 }
4456
4457 /*
4458 * uCode wakes up after power-down sleep.
4459 * Tell device about any new tx or host commands enqueued,
4460 * and about any Rx buffers made available while asleep.
4461 */
4462 if (inta & CSR_INT_BIT_WAKEUP) {
4463 D_ISR("Wakeup interrupt\n");
4464 il_rx_queue_update_write_ptr(il, &il->rxq);
4465 for (i = 0; i < il->hw_params.max_txq_num; i++)
4466 il_txq_update_write_ptr(il, &il->txq[i]);
4467 il->isr_stats.wakeup++;
4468 handled |= CSR_INT_BIT_WAKEUP;
4469 }
4470
4471 /* All uCode command responses, including Tx command responses,
4472 * Rx "responses" (frame-received notification), and other
4473 * notifications from uCode come through here*/
4474 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4475 il4965_rx_handle(il);
4476 il->isr_stats.rx++;
4477 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4478 }
4479
4480 /* This "Tx" DMA channel is used only for loading uCode */
4481 if (inta & CSR_INT_BIT_FH_TX) {
4482 D_ISR("uCode load interrupt\n");
4483 il->isr_stats.tx++;
4484 handled |= CSR_INT_BIT_FH_TX;
4485 /* Wake up uCode load routine, now that load is complete */
4486 il->ucode_write_complete = 1;
4487 wake_up(&il->wait_command_queue);
4488 }
4489
4490 if (inta & ~handled) {
4491 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4492 il->isr_stats.unhandled++;
4493 }
4494
4495 if (inta & ~(il->inta_mask)) {
4496 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
4497 inta & ~il->inta_mask);
4498 IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh);
4499 }
4500
4501 /* Re-enable all interrupts */
4502 /* only Re-enable if disabled by irq */
4503 if (test_bit(S_INT_ENABLED, &il->status))
4504 il_enable_interrupts(il);
4505 /* Re-enable RF_KILL if it occurred */
4506 else if (handled & CSR_INT_BIT_RF_KILL)
4507 il_enable_rfkill_int(il);
4508
4509 #ifdef CONFIG_IWLEGACY_DEBUG
4510 if (il_get_debug_level(il) & (IL_DL_ISR)) {
4511 inta = _il_rd(il, CSR_INT);
4512 inta_mask = _il_rd(il, CSR_INT_MASK);
4513 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4514 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4515 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4516 }
4517 #endif
4518 }
4519
4520 /*****************************************************************************
4521 *
4522 * sysfs attributes
4523 *
4524 *****************************************************************************/
4525
4526 #ifdef CONFIG_IWLEGACY_DEBUG
4527
4528 /*
4529 * The following adds a new attribute to the sysfs representation
4530 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
4531 * used for controlling the debug level.
4532 *
4533 * See the level definitions in iwl for details.
4534 *
4535 * The debug_level being managed using sysfs below is a per device debug
4536 * level that is used instead of the global debug level if it (the per
4537 * device debug level) is set.
4538 */
4539 static ssize_t
4540 il4965_show_debug_level(struct device *d, struct device_attribute *attr,
4541 char *buf)
4542 {
4543 struct il_priv *il = dev_get_drvdata(d);
4544 return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
4545 }
4546
4547 static ssize_t
4548 il4965_store_debug_level(struct device *d, struct device_attribute *attr,
4549 const char *buf, size_t count)
4550 {
4551 struct il_priv *il = dev_get_drvdata(d);
4552 unsigned long val;
4553 int ret;
4554
4555 ret = kstrtoul(buf, 0, &val);
4556 if (ret)
4557 IL_ERR("%s is not in hex or decimal form.\n", buf);
4558 else
4559 il->debug_level = val;
4560
4561 return strnlen(buf, count);
4562 }
4563
4564 static DEVICE_ATTR(debug_level, 0644, il4965_show_debug_level,
4565 il4965_store_debug_level);
4566
4567 #endif /* CONFIG_IWLEGACY_DEBUG */
4568
4569 static ssize_t
4570 il4965_show_temperature(struct device *d, struct device_attribute *attr,
4571 char *buf)
4572 {
4573 struct il_priv *il = dev_get_drvdata(d);
4574
4575 if (!il_is_alive(il))
4576 return -EAGAIN;
4577
4578 return sprintf(buf, "%d\n", il->temperature);
4579 }
4580
4581 static DEVICE_ATTR(temperature, 0444, il4965_show_temperature, NULL);
4582
4583 static ssize_t
4584 il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
4585 {
4586 struct il_priv *il = dev_get_drvdata(d);
4587
4588 if (!il_is_ready_rf(il))
4589 return sprintf(buf, "off\n");
4590 else
4591 return sprintf(buf, "%d\n", il->tx_power_user_lmt);
4592 }
4593
4594 static ssize_t
4595 il4965_store_tx_power(struct device *d, struct device_attribute *attr,
4596 const char *buf, size_t count)
4597 {
4598 struct il_priv *il = dev_get_drvdata(d);
4599 unsigned long val;
4600 int ret;
4601
4602 ret = kstrtoul(buf, 10, &val);
4603 if (ret)
4604 IL_INFO("%s is not in decimal form.\n", buf);
4605 else {
4606 ret = il_set_tx_power(il, val, false);
4607 if (ret)
4608 IL_ERR("failed setting tx power (0x%08x).\n", ret);
4609 else
4610 ret = count;
4611 }
4612 return ret;
4613 }
4614
4615 static DEVICE_ATTR(tx_power, 0644, il4965_show_tx_power,
4616 il4965_store_tx_power);
4617
4618 static struct attribute *il_sysfs_entries[] = {
4619 &dev_attr_temperature.attr,
4620 &dev_attr_tx_power.attr,
4621 #ifdef CONFIG_IWLEGACY_DEBUG
4622 &dev_attr_debug_level.attr,
4623 #endif
4624 NULL
4625 };
4626
4627 static const struct attribute_group il_attribute_group = {
4628 .name = NULL, /* put in device directory */
4629 .attrs = il_sysfs_entries,
4630 };
4631
4632 /******************************************************************************
4633 *
4634 * uCode download functions
4635 *
4636 ******************************************************************************/
4637
4638 static void
4639 il4965_dealloc_ucode_pci(struct il_priv *il)
4640 {
4641 il_free_fw_desc(il->pci_dev, &il->ucode_code);
4642 il_free_fw_desc(il->pci_dev, &il->ucode_data);
4643 il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
4644 il_free_fw_desc(il->pci_dev, &il->ucode_init);
4645 il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
4646 il_free_fw_desc(il->pci_dev, &il->ucode_boot);
4647 }
4648
4649 static void
4650 il4965_nic_start(struct il_priv *il)
4651 {
4652 /* Remove all resets to allow NIC to operate */
4653 _il_wr(il, CSR_RESET, 0);
4654 }
4655
4656 static void il4965_ucode_callback(const struct firmware *ucode_raw,
4657 void *context);
4658 static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length);
4659
4660 static int __must_check
4661 il4965_request_firmware(struct il_priv *il, bool first)
4662 {
4663 const char *name_pre = il->cfg->fw_name_pre;
4664 char tag[8];
4665
4666 if (first) {
4667 il->fw_idx = il->cfg->ucode_api_max;
4668 sprintf(tag, "%d", il->fw_idx);
4669 } else {
4670 il->fw_idx--;
4671 sprintf(tag, "%d", il->fw_idx);
4672 }
4673
4674 if (il->fw_idx < il->cfg->ucode_api_min) {
4675 IL_ERR("no suitable firmware found!\n");
4676 return -ENOENT;
4677 }
4678
4679 sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
4680
4681 D_INFO("attempting to load firmware '%s'\n", il->firmware_name);
4682
4683 return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name,
4684 &il->pci_dev->dev, GFP_KERNEL, il,
4685 il4965_ucode_callback);
4686 }
4687
4688 struct il4965_firmware_pieces {
4689 const void *inst, *data, *init, *init_data, *boot;
4690 size_t inst_size, data_size, init_size, init_data_size, boot_size;
4691 };
4692
4693 static int
4694 il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw,
4695 struct il4965_firmware_pieces *pieces)
4696 {
4697 struct il_ucode_header *ucode = (void *)ucode_raw->data;
4698 u32 api_ver, hdr_size;
4699 const u8 *src;
4700
4701 il->ucode_ver = le32_to_cpu(ucode->ver);
4702 api_ver = IL_UCODE_API(il->ucode_ver);
4703
4704 switch (api_ver) {
4705 default:
4706 case 0:
4707 case 1:
4708 case 2:
4709 hdr_size = 24;
4710 if (ucode_raw->size < hdr_size) {
4711 IL_ERR("File size too small!\n");
4712 return -EINVAL;
4713 }
4714 pieces->inst_size = le32_to_cpu(ucode->v1.inst_size);
4715 pieces->data_size = le32_to_cpu(ucode->v1.data_size);
4716 pieces->init_size = le32_to_cpu(ucode->v1.init_size);
4717 pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size);
4718 pieces->boot_size = le32_to_cpu(ucode->v1.boot_size);
4719 src = ucode->v1.data;
4720 break;
4721 }
4722
4723 /* Verify size of file vs. image size info in file's header */
4724 if (ucode_raw->size !=
4725 hdr_size + pieces->inst_size + pieces->data_size +
4726 pieces->init_size + pieces->init_data_size + pieces->boot_size) {
4727
4728 IL_ERR("uCode file size %d does not match expected size\n",
4729 (int)ucode_raw->size);
4730 return -EINVAL;
4731 }
4732
4733 pieces->inst = src;
4734 src += pieces->inst_size;
4735 pieces->data = src;
4736 src += pieces->data_size;
4737 pieces->init = src;
4738 src += pieces->init_size;
4739 pieces->init_data = src;
4740 src += pieces->init_data_size;
4741 pieces->boot = src;
4742 src += pieces->boot_size;
4743
4744 return 0;
4745 }
4746
4747 /*
4748 * il4965_ucode_callback - callback when firmware was loaded
4749 *
4750 * If loaded successfully, copies the firmware into buffers
4751 * for the card to fetch (via DMA).
4752 */
4753 static void
4754 il4965_ucode_callback(const struct firmware *ucode_raw, void *context)
4755 {
4756 struct il_priv *il = context;
4757 int err;
4758 struct il4965_firmware_pieces pieces;
4759 const unsigned int api_max = il->cfg->ucode_api_max;
4760 const unsigned int api_min = il->cfg->ucode_api_min;
4761 u32 api_ver;
4762
4763 u32 max_probe_length = 200;
4764 u32 standard_phy_calibration_size =
4765 IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE;
4766
4767 memset(&pieces, 0, sizeof(pieces));
4768
4769 if (!ucode_raw) {
4770 if (il->fw_idx <= il->cfg->ucode_api_max)
4771 IL_ERR("request for firmware file '%s' failed.\n",
4772 il->firmware_name);
4773 goto try_again;
4774 }
4775
4776 D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name,
4777 ucode_raw->size);
4778
4779 /* Make sure that we got at least the API version number */
4780 if (ucode_raw->size < 4) {
4781 IL_ERR("File size way too small!\n");
4782 goto try_again;
4783 }
4784
4785 /* Data from ucode file: header followed by uCode images */
4786 err = il4965_load_firmware(il, ucode_raw, &pieces);
4787
4788 if (err)
4789 goto try_again;
4790
4791 api_ver = IL_UCODE_API(il->ucode_ver);
4792
4793 /*
4794 * api_ver should match the api version forming part of the
4795 * firmware filename ... but we don't check for that and only rely
4796 * on the API version read from firmware header from here on forward
4797 */
4798 if (api_ver < api_min || api_ver > api_max) {
4799 IL_ERR("Driver unable to support your firmware API. "
4800 "Driver supports v%u, firmware is v%u.\n", api_max,
4801 api_ver);
4802 goto try_again;
4803 }
4804
4805 if (api_ver != api_max)
4806 IL_ERR("Firmware has old API version. Expected v%u, "
4807 "got v%u. New firmware can be obtained "
4808 "from http://www.intellinuxwireless.org.\n", api_max,
4809 api_ver);
4810
4811 IL_INFO("loaded firmware version %u.%u.%u.%u\n",
4812 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
4813 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
4814
4815 snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
4816 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
4817 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
4818 IL_UCODE_SERIAL(il->ucode_ver));
4819
4820 /*
4821 * For any of the failures below (before allocating pci memory)
4822 * we will try to load a version with a smaller API -- maybe the
4823 * user just got a corrupted version of the latest API.
4824 */
4825
4826 D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
4827 D_INFO("f/w package hdr runtime inst size = %zd\n", pieces.inst_size);
4828 D_INFO("f/w package hdr runtime data size = %zd\n", pieces.data_size);
4829 D_INFO("f/w package hdr init inst size = %zd\n", pieces.init_size);
4830 D_INFO("f/w package hdr init data size = %zd\n", pieces.init_data_size);
4831 D_INFO("f/w package hdr boot inst size = %zd\n", pieces.boot_size);
4832
4833 /* Verify that uCode images will fit in card's SRAM */
4834 if (pieces.inst_size > il->hw_params.max_inst_size) {
4835 IL_ERR("uCode instr len %zd too large to fit in\n",
4836 pieces.inst_size);
4837 goto try_again;
4838 }
4839
4840 if (pieces.data_size > il->hw_params.max_data_size) {
4841 IL_ERR("uCode data len %zd too large to fit in\n",
4842 pieces.data_size);
4843 goto try_again;
4844 }
4845
4846 if (pieces.init_size > il->hw_params.max_inst_size) {
4847 IL_ERR("uCode init instr len %zd too large to fit in\n",
4848 pieces.init_size);
4849 goto try_again;
4850 }
4851
4852 if (pieces.init_data_size > il->hw_params.max_data_size) {
4853 IL_ERR("uCode init data len %zd too large to fit in\n",
4854 pieces.init_data_size);
4855 goto try_again;
4856 }
4857
4858 if (pieces.boot_size > il->hw_params.max_bsm_size) {
4859 IL_ERR("uCode boot instr len %zd too large to fit in\n",
4860 pieces.boot_size);
4861 goto try_again;
4862 }
4863
4864 /* Allocate ucode buffers for card's bus-master loading ... */
4865
4866 /* Runtime instructions and 2 copies of data:
4867 * 1) unmodified from disk
4868 * 2) backup cache for save/restore during power-downs */
4869 il->ucode_code.len = pieces.inst_size;
4870 il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
4871
4872 il->ucode_data.len = pieces.data_size;
4873 il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
4874
4875 il->ucode_data_backup.len = pieces.data_size;
4876 il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
4877
4878 if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
4879 !il->ucode_data_backup.v_addr)
4880 goto err_pci_alloc;
4881
4882 /* Initialization instructions and data */
4883 if (pieces.init_size && pieces.init_data_size) {
4884 il->ucode_init.len = pieces.init_size;
4885 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
4886
4887 il->ucode_init_data.len = pieces.init_data_size;
4888 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
4889
4890 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
4891 goto err_pci_alloc;
4892 }
4893
4894 /* Bootstrap (instructions only, no data) */
4895 if (pieces.boot_size) {
4896 il->ucode_boot.len = pieces.boot_size;
4897 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
4898
4899 if (!il->ucode_boot.v_addr)
4900 goto err_pci_alloc;
4901 }
4902
4903 /* Now that we can no longer fail, copy information */
4904
4905 il->sta_key_max_num = STA_KEY_MAX_NUM;
4906
4907 /* Copy images into buffers for card's bus-master reads ... */
4908
4909 /* Runtime instructions (first block of data in file) */
4910 D_INFO("Copying (but not loading) uCode instr len %zd\n",
4911 pieces.inst_size);
4912 memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size);
4913
4914 D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4915 il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
4916
4917 /*
4918 * Runtime data
4919 * NOTE: Copy into backup buffer will be done in il_up()
4920 */
4921 D_INFO("Copying (but not loading) uCode data len %zd\n",
4922 pieces.data_size);
4923 memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size);
4924 memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size);
4925
4926 /* Initialization instructions */
4927 if (pieces.init_size) {
4928 D_INFO("Copying (but not loading) init instr len %zd\n",
4929 pieces.init_size);
4930 memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size);
4931 }
4932
4933 /* Initialization data */
4934 if (pieces.init_data_size) {
4935 D_INFO("Copying (but not loading) init data len %zd\n",
4936 pieces.init_data_size);
4937 memcpy(il->ucode_init_data.v_addr, pieces.init_data,
4938 pieces.init_data_size);
4939 }
4940
4941 /* Bootstrap instructions */
4942 D_INFO("Copying (but not loading) boot instr len %zd\n",
4943 pieces.boot_size);
4944 memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size);
4945
4946 /*
4947 * figure out the offset of chain noise reset and gain commands
4948 * base on the size of standard phy calibration commands table size
4949 */
4950 il->_4965.phy_calib_chain_noise_reset_cmd =
4951 standard_phy_calibration_size;
4952 il->_4965.phy_calib_chain_noise_gain_cmd =
4953 standard_phy_calibration_size + 1;
4954
4955 /**************************************************
4956 * This is still part of probe() in a sense...
4957 *
4958 * 9. Setup and register with mac80211 and debugfs
4959 **************************************************/
4960 err = il4965_mac_setup_register(il, max_probe_length);
4961 if (err)
4962 goto out_unbind;
4963
4964 il_dbgfs_register(il, DRV_NAME);
4965
4966 err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group);
4967 if (err) {
4968 IL_ERR("failed to create sysfs device attributes\n");
4969 goto out_unbind;
4970 }
4971
4972 /* We have our copies now, allow OS release its copies */
4973 release_firmware(ucode_raw);
4974 complete(&il->_4965.firmware_loading_complete);
4975 return;
4976
4977 try_again:
4978 /* try next, if any */
4979 if (il4965_request_firmware(il, false))
4980 goto out_unbind;
4981 release_firmware(ucode_raw);
4982 return;
4983
4984 err_pci_alloc:
4985 IL_ERR("failed to allocate pci memory\n");
4986 il4965_dealloc_ucode_pci(il);
4987 out_unbind:
4988 complete(&il->_4965.firmware_loading_complete);
4989 device_release_driver(&il->pci_dev->dev);
4990 release_firmware(ucode_raw);
4991 }
4992
4993 static const char *const desc_lookup_text[] = {
4994 "OK",
4995 "FAIL",
4996 "BAD_PARAM",
4997 "BAD_CHECKSUM",
4998 "NMI_INTERRUPT_WDG",
4999 "SYSASSERT",
5000 "FATAL_ERROR",
5001 "BAD_COMMAND",
5002 "HW_ERROR_TUNE_LOCK",
5003 "HW_ERROR_TEMPERATURE",
5004 "ILLEGAL_CHAN_FREQ",
5005 "VCC_NOT_STBL",
5006 "FH49_ERROR",
5007 "NMI_INTERRUPT_HOST",
5008 "NMI_INTERRUPT_ACTION_PT",
5009 "NMI_INTERRUPT_UNKNOWN",
5010 "UCODE_VERSION_MISMATCH",
5011 "HW_ERROR_ABS_LOCK",
5012 "HW_ERROR_CAL_LOCK_FAIL",
5013 "NMI_INTERRUPT_INST_ACTION_PT",
5014 "NMI_INTERRUPT_DATA_ACTION_PT",
5015 "NMI_TRM_HW_ER",
5016 "NMI_INTERRUPT_TRM",
5017 "NMI_INTERRUPT_BREAK_POINT",
5018 "DEBUG_0",
5019 "DEBUG_1",
5020 "DEBUG_2",
5021 "DEBUG_3",
5022 };
5023
5024 static struct {
5025 char *name;
5026 u8 num;
5027 } advanced_lookup[] = {
5028 {
5029 "NMI_INTERRUPT_WDG", 0x34}, {
5030 "SYSASSERT", 0x35}, {
5031 "UCODE_VERSION_MISMATCH", 0x37}, {
5032 "BAD_COMMAND", 0x38}, {
5033 "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, {
5034 "FATAL_ERROR", 0x3D}, {
5035 "NMI_TRM_HW_ERR", 0x46}, {
5036 "NMI_INTERRUPT_TRM", 0x4C}, {
5037 "NMI_INTERRUPT_BREAK_POINT", 0x54}, {
5038 "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, {
5039 "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, {
5040 "NMI_INTERRUPT_HOST", 0x66}, {
5041 "NMI_INTERRUPT_ACTION_PT", 0x7C}, {
5042 "NMI_INTERRUPT_UNKNOWN", 0x84}, {
5043 "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, {
5044 "ADVANCED_SYSASSERT", 0},};
5045
5046 static const char *
5047 il4965_desc_lookup(u32 num)
5048 {
5049 int i;
5050 int max = ARRAY_SIZE(desc_lookup_text);
5051
5052 if (num < max)
5053 return desc_lookup_text[num];
5054
5055 max = ARRAY_SIZE(advanced_lookup) - 1;
5056 for (i = 0; i < max; i++) {
5057 if (advanced_lookup[i].num == num)
5058 break;
5059 }
5060 return advanced_lookup[i].name;
5061 }
5062
5063 #define ERROR_START_OFFSET (1 * sizeof(u32))
5064 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
5065
5066 void
5067 il4965_dump_nic_error_log(struct il_priv *il)
5068 {
5069 u32 data2, line;
5070 u32 desc, time, count, base, data1;
5071 u32 blink1, blink2, ilink1, ilink2;
5072 u32 pc, hcmd;
5073
5074 if (il->ucode_type == UCODE_INIT)
5075 base = le32_to_cpu(il->card_alive_init.error_event_table_ptr);
5076 else
5077 base = le32_to_cpu(il->card_alive.error_event_table_ptr);
5078
5079 if (!il->ops->is_valid_rtc_data_addr(base)) {
5080 IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n",
5081 base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT");
5082 return;
5083 }
5084
5085 count = il_read_targ_mem(il, base);
5086
5087 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
5088 IL_ERR("Start IWL Error Log Dump:\n");
5089 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
5090 }
5091
5092 desc = il_read_targ_mem(il, base + 1 * sizeof(u32));
5093 il->isr_stats.err_code = desc;
5094 pc = il_read_targ_mem(il, base + 2 * sizeof(u32));
5095 blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32));
5096 blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32));
5097 ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32));
5098 ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32));
5099 data1 = il_read_targ_mem(il, base + 7 * sizeof(u32));
5100 data2 = il_read_targ_mem(il, base + 8 * sizeof(u32));
5101 line = il_read_targ_mem(il, base + 9 * sizeof(u32));
5102 time = il_read_targ_mem(il, base + 11 * sizeof(u32));
5103 hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32));
5104
5105 IL_ERR("Desc Time "
5106 "data1 data2 line\n");
5107 IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n",
5108 il4965_desc_lookup(desc), desc, time, data1, data2, line);
5109 IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n");
5110 IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1,
5111 blink2, ilink1, ilink2, hcmd);
5112 }
5113
5114 static void
5115 il4965_rf_kill_ct_config(struct il_priv *il)
5116 {
5117 struct il_ct_kill_config cmd;
5118 unsigned long flags;
5119 int ret = 0;
5120
5121 spin_lock_irqsave(&il->lock, flags);
5122 _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
5123 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
5124 spin_unlock_irqrestore(&il->lock, flags);
5125
5126 cmd.critical_temperature_R =
5127 cpu_to_le32(il->hw_params.ct_kill_threshold);
5128
5129 ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd);
5130 if (ret)
5131 IL_ERR("C_CT_KILL_CONFIG failed\n");
5132 else
5133 D_INFO("C_CT_KILL_CONFIG " "succeeded, "
5134 "critical temperature is %d\n",
5135 il->hw_params.ct_kill_threshold);
5136 }
5137
5138 static const s8 default_queue_to_tx_fifo[] = {
5139 IL_TX_FIFO_VO,
5140 IL_TX_FIFO_VI,
5141 IL_TX_FIFO_BE,
5142 IL_TX_FIFO_BK,
5143 IL49_CMD_FIFO_NUM,
5144 IL_TX_FIFO_UNUSED,
5145 IL_TX_FIFO_UNUSED,
5146 };
5147
5148 #define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
5149
5150 static int
5151 il4965_alive_notify(struct il_priv *il)
5152 {
5153 u32 a;
5154 unsigned long flags;
5155 int i, chan;
5156 u32 reg_val;
5157
5158 spin_lock_irqsave(&il->lock, flags);
5159
5160 /* Clear 4965's internal Tx Scheduler data base */
5161 il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR);
5162 a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET;
5163 for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
5164 il_write_targ_mem(il, a, 0);
5165 for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
5166 il_write_targ_mem(il, a, 0);
5167 for (;
5168 a <
5169 il->scd_base_addr +
5170 IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num);
5171 a += 4)
5172 il_write_targ_mem(il, a, 0);
5173
5174 /* Tel 4965 where to find Tx byte count tables */
5175 il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10);
5176
5177 /* Enable DMA channel */
5178 for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++)
5179 il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan),
5180 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
5181 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
5182
5183 /* Update FH chicken bits */
5184 reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG);
5185 il_wr(il, FH49_TX_CHICKEN_BITS_REG,
5186 reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
5187
5188 /* Disable chain mode for all queues */
5189 il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0);
5190
5191 /* Initialize each Tx queue (including the command queue) */
5192 for (i = 0; i < il->hw_params.max_txq_num; i++) {
5193
5194 /* TFD circular buffer read/write idxes */
5195 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0);
5196 il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8));
5197
5198 /* Max Tx Window size for Scheduler-ACK mode */
5199 il_write_targ_mem(il,
5200 il->scd_base_addr +
5201 IL49_SCD_CONTEXT_QUEUE_OFFSET(i),
5202 (SCD_WIN_SIZE <<
5203 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
5204 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
5205
5206 /* Frame limit */
5207 il_write_targ_mem(il,
5208 il->scd_base_addr +
5209 IL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
5210 sizeof(u32),
5211 (SCD_FRAME_LIMIT <<
5212 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
5213 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
5214
5215 }
5216 il_wr_prph(il, IL49_SCD_INTERRUPT_MASK,
5217 (1 << il->hw_params.max_txq_num) - 1);
5218
5219 /* Activate all Tx DMA/FIFO channels */
5220 il4965_txq_set_sched(il, IL_MASK(0, 6));
5221
5222 il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0);
5223
5224 /* make sure all queue are not stopped */
5225 memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped));
5226 for (i = 0; i < 4; i++)
5227 atomic_set(&il->queue_stop_count[i], 0);
5228
5229 /* reset to 0 to enable all the queue first */
5230 il->txq_ctx_active_msk = 0;
5231 /* Map each Tx/cmd queue to its corresponding fifo */
5232 BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7);
5233
5234 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
5235 int ac = default_queue_to_tx_fifo[i];
5236
5237 il_txq_ctx_activate(il, i);
5238
5239 if (ac == IL_TX_FIFO_UNUSED)
5240 continue;
5241
5242 il4965_tx_queue_set_status(il, &il->txq[i], ac, 0);
5243 }
5244
5245 spin_unlock_irqrestore(&il->lock, flags);
5246
5247 return 0;
5248 }
5249
5250 /*
5251 * il4965_alive_start - called after N_ALIVE notification received
5252 * from protocol/runtime uCode (initialization uCode's
5253 * Alive gets handled by il_init_alive_start()).
5254 */
5255 static void
5256 il4965_alive_start(struct il_priv *il)
5257 {
5258 int ret = 0;
5259
5260 D_INFO("Runtime Alive received.\n");
5261
5262 if (il->card_alive.is_valid != UCODE_VALID_OK) {
5263 /* We had an error bringing up the hardware, so take it
5264 * all the way back down so we can try again */
5265 D_INFO("Alive failed.\n");
5266 goto restart;
5267 }
5268
5269 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5270 * This is a paranoid check, because we would not have gotten the
5271 * "runtime" alive if code weren't properly loaded. */
5272 if (il4965_verify_ucode(il)) {
5273 /* Runtime instruction load was bad;
5274 * take it all the way back down so we can try again */
5275 D_INFO("Bad runtime uCode load.\n");
5276 goto restart;
5277 }
5278
5279 ret = il4965_alive_notify(il);
5280 if (ret) {
5281 IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret);
5282 goto restart;
5283 }
5284
5285 /* After the ALIVE response, we can send host commands to the uCode */
5286 set_bit(S_ALIVE, &il->status);
5287
5288 /* Enable watchdog to monitor the driver tx queues */
5289 il_setup_watchdog(il);
5290
5291 if (il_is_rfkill(il))
5292 return;
5293
5294 ieee80211_wake_queues(il->hw);
5295
5296 il->active_rate = RATES_MASK;
5297
5298 il_power_update_mode(il, true);
5299 D_INFO("Updated power mode\n");
5300
5301 if (il_is_associated(il)) {
5302 struct il_rxon_cmd *active_rxon =
5303 (struct il_rxon_cmd *)&il->active;
5304 /* apply any changes in staging */
5305 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
5306 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5307 } else {
5308 /* Initialize our rx_config data */
5309 il_connection_init_rx_config(il);
5310
5311 if (il->ops->set_rxon_chain)
5312 il->ops->set_rxon_chain(il);
5313 }
5314
5315 /* Configure bluetooth coexistence if enabled */
5316 il_send_bt_config(il);
5317
5318 il4965_reset_run_time_calib(il);
5319
5320 set_bit(S_READY, &il->status);
5321
5322 /* Configure the adapter for unassociated operation */
5323 il_commit_rxon(il);
5324
5325 /* At this point, the NIC is initialized and operational */
5326 il4965_rf_kill_ct_config(il);
5327
5328 D_INFO("ALIVE processing complete.\n");
5329 wake_up(&il->wait_command_queue);
5330
5331 return;
5332
5333 restart:
5334 queue_work(il->workqueue, &il->restart);
5335 }
5336
5337 static void il4965_cancel_deferred_work(struct il_priv *il);
5338
5339 static void
5340 __il4965_down(struct il_priv *il)
5341 {
5342 unsigned long flags;
5343 int exit_pending;
5344
5345 D_INFO(DRV_NAME " is going down\n");
5346
5347 il_scan_cancel_timeout(il, 200);
5348
5349 exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
5350
5351 /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
5352 * to prevent rearm timer */
5353 del_timer_sync(&il->watchdog);
5354
5355 il_clear_ucode_stations(il);
5356
5357 /* FIXME: race conditions ? */
5358 spin_lock_irq(&il->sta_lock);
5359 /*
5360 * Remove all key information that is not stored as part
5361 * of station information since mac80211 may not have had
5362 * a chance to remove all the keys. When device is
5363 * reconfigured by mac80211 after an error all keys will
5364 * be reconfigured.
5365 */
5366 memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys));
5367 il->_4965.key_mapping_keys = 0;
5368 spin_unlock_irq(&il->sta_lock);
5369
5370 il_dealloc_bcast_stations(il);
5371 il_clear_driver_stations(il);
5372
5373 /* Unblock any waiting calls */
5374 wake_up_all(&il->wait_command_queue);
5375
5376 /* Wipe out the EXIT_PENDING status bit if we are not actually
5377 * exiting the module */
5378 if (!exit_pending)
5379 clear_bit(S_EXIT_PENDING, &il->status);
5380
5381 /* stop and reset the on-board processor */
5382 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5383
5384 /* tell the device to stop sending interrupts */
5385 spin_lock_irqsave(&il->lock, flags);
5386 il_disable_interrupts(il);
5387 spin_unlock_irqrestore(&il->lock, flags);
5388 il4965_synchronize_irq(il);
5389
5390 if (il->mac80211_registered)
5391 ieee80211_stop_queues(il->hw);
5392
5393 /* If we have not previously called il_init() then
5394 * clear all bits but the RF Kill bit and return */
5395 if (!il_is_init(il)) {
5396 il->status =
5397 test_bit(S_RFKILL, &il->status) << S_RFKILL |
5398 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5399 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5400 goto exit;
5401 }
5402
5403 /* ...otherwise clear out all the status bits but the RF Kill
5404 * bit and continue taking the NIC down. */
5405 il->status &=
5406 test_bit(S_RFKILL, &il->status) << S_RFKILL |
5407 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5408 test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
5409 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5410
5411 /*
5412 * We disabled and synchronized interrupt, and priv->mutex is taken, so
5413 * here is the only thread which will program device registers, but
5414 * still have lockdep assertions, so we are taking reg_lock.
5415 */
5416 spin_lock_irq(&il->reg_lock);
5417 /* FIXME: il_grab_nic_access if rfkill is off ? */
5418
5419 il4965_txq_ctx_stop(il);
5420 il4965_rxq_stop(il);
5421 /* Power-down device's busmaster DMA clocks */
5422 _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
5423 udelay(5);
5424 /* Make sure (redundant) we've released our request to stay awake */
5425 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5426 /* Stop the device, and put it in low power state */
5427 _il_apm_stop(il);
5428
5429 spin_unlock_irq(&il->reg_lock);
5430
5431 il4965_txq_ctx_unmap(il);
5432 exit:
5433 memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
5434
5435 dev_kfree_skb(il->beacon_skb);
5436 il->beacon_skb = NULL;
5437
5438 /* clear out any free frames */
5439 il4965_clear_free_frames(il);
5440 }
5441
5442 static void
5443 il4965_down(struct il_priv *il)
5444 {
5445 mutex_lock(&il->mutex);
5446 __il4965_down(il);
5447 mutex_unlock(&il->mutex);
5448
5449 il4965_cancel_deferred_work(il);
5450 }
5451
5452
5453 static void
5454 il4965_set_hw_ready(struct il_priv *il)
5455 {
5456 int ret;
5457
5458 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
5459 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
5460
5461 /* See if we got it */
5462 ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5463 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5464 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5465 100);
5466 if (ret >= 0)
5467 il->hw_ready = true;
5468
5469 D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not");
5470 }
5471
5472 static void
5473 il4965_prepare_card_hw(struct il_priv *il)
5474 {
5475 int ret;
5476
5477 il->hw_ready = false;
5478
5479 il4965_set_hw_ready(il);
5480 if (il->hw_ready)
5481 return;
5482
5483 /* If HW is not ready, prepare the conditions to check again */
5484 il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE);
5485
5486 ret =
5487 _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5488 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
5489 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
5490
5491 /* HW should be ready by now, check again. */
5492 if (ret != -ETIMEDOUT)
5493 il4965_set_hw_ready(il);
5494 }
5495
5496 #define MAX_HW_RESTARTS 5
5497
5498 static int
5499 __il4965_up(struct il_priv *il)
5500 {
5501 int i;
5502 int ret;
5503
5504 if (test_bit(S_EXIT_PENDING, &il->status)) {
5505 IL_WARN("Exit pending; will not bring the NIC up\n");
5506 return -EIO;
5507 }
5508
5509 if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
5510 IL_ERR("ucode not available for device bringup\n");
5511 return -EIO;
5512 }
5513
5514 ret = il4965_alloc_bcast_station(il);
5515 if (ret) {
5516 il_dealloc_bcast_stations(il);
5517 return ret;
5518 }
5519
5520 il4965_prepare_card_hw(il);
5521 if (!il->hw_ready) {
5522 il_dealloc_bcast_stations(il);
5523 IL_ERR("HW not ready\n");
5524 return -EIO;
5525 }
5526
5527 /* If platform's RF_KILL switch is NOT set to KILL */
5528 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5529 clear_bit(S_RFKILL, &il->status);
5530 else {
5531 set_bit(S_RFKILL, &il->status);
5532 wiphy_rfkill_set_hw_state(il->hw->wiphy, true);
5533
5534 il_dealloc_bcast_stations(il);
5535 il_enable_rfkill_int(il);
5536 IL_WARN("Radio disabled by HW RF Kill switch\n");
5537 return 0;
5538 }
5539
5540 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5541
5542 /* must be initialised before il_hw_nic_init */
5543 il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM;
5544
5545 ret = il4965_hw_nic_init(il);
5546 if (ret) {
5547 IL_ERR("Unable to init nic\n");
5548 il_dealloc_bcast_stations(il);
5549 return ret;
5550 }
5551
5552 /* make sure rfkill handshake bits are cleared */
5553 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5554 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5555
5556 /* clear (again), then enable host interrupts */
5557 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5558 il_enable_interrupts(il);
5559
5560 /* really make sure rfkill handshake bits are cleared */
5561 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5562 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5563
5564 /* Copy original ucode data image from disk into backup cache.
5565 * This will be used to initialize the on-board processor's
5566 * data SRAM for a clean start when the runtime program first loads. */
5567 memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
5568 il->ucode_data.len);
5569
5570 for (i = 0; i < MAX_HW_RESTARTS; i++) {
5571
5572 /* load bootstrap state machine,
5573 * load bootstrap program into processor's memory,
5574 * prepare to load the "initialize" uCode */
5575 ret = il->ops->load_ucode(il);
5576
5577 if (ret) {
5578 IL_ERR("Unable to set up bootstrap uCode: %d\n", ret);
5579 continue;
5580 }
5581
5582 /* start card; "initialize" will load runtime ucode */
5583 il4965_nic_start(il);
5584
5585 D_INFO(DRV_NAME " is coming up\n");
5586
5587 return 0;
5588 }
5589
5590 set_bit(S_EXIT_PENDING, &il->status);
5591 __il4965_down(il);
5592 clear_bit(S_EXIT_PENDING, &il->status);
5593
5594 /* tried to restart and config the device for as long as our
5595 * patience could withstand */
5596 IL_ERR("Unable to initialize device after %d attempts.\n", i);
5597 return -EIO;
5598 }
5599
5600 /*****************************************************************************
5601 *
5602 * Workqueue callbacks
5603 *
5604 *****************************************************************************/
5605
5606 static void
5607 il4965_bg_init_alive_start(struct work_struct *data)
5608 {
5609 struct il_priv *il =
5610 container_of(data, struct il_priv, init_alive_start.work);
5611
5612 mutex_lock(&il->mutex);
5613 if (test_bit(S_EXIT_PENDING, &il->status))
5614 goto out;
5615
5616 il->ops->init_alive_start(il);
5617 out:
5618 mutex_unlock(&il->mutex);
5619 }
5620
5621 static void
5622 il4965_bg_alive_start(struct work_struct *data)
5623 {
5624 struct il_priv *il =
5625 container_of(data, struct il_priv, alive_start.work);
5626
5627 mutex_lock(&il->mutex);
5628 if (test_bit(S_EXIT_PENDING, &il->status))
5629 goto out;
5630
5631 il4965_alive_start(il);
5632 out:
5633 mutex_unlock(&il->mutex);
5634 }
5635
5636 static void
5637 il4965_bg_run_time_calib_work(struct work_struct *work)
5638 {
5639 struct il_priv *il = container_of(work, struct il_priv,
5640 run_time_calib_work);
5641
5642 mutex_lock(&il->mutex);
5643
5644 if (test_bit(S_EXIT_PENDING, &il->status) ||
5645 test_bit(S_SCANNING, &il->status)) {
5646 mutex_unlock(&il->mutex);
5647 return;
5648 }
5649
5650 if (il->start_calib) {
5651 il4965_chain_noise_calibration(il, (void *)&il->_4965.stats);
5652 il4965_sensitivity_calibration(il, (void *)&il->_4965.stats);
5653 }
5654
5655 mutex_unlock(&il->mutex);
5656 }
5657
5658 static void
5659 il4965_bg_restart(struct work_struct *data)
5660 {
5661 struct il_priv *il = container_of(data, struct il_priv, restart);
5662
5663 if (test_bit(S_EXIT_PENDING, &il->status))
5664 return;
5665
5666 if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
5667 mutex_lock(&il->mutex);
5668 il->is_open = 0;
5669
5670 __il4965_down(il);
5671
5672 mutex_unlock(&il->mutex);
5673 il4965_cancel_deferred_work(il);
5674 ieee80211_restart_hw(il->hw);
5675 } else {
5676 il4965_down(il);
5677
5678 mutex_lock(&il->mutex);
5679 if (test_bit(S_EXIT_PENDING, &il->status)) {
5680 mutex_unlock(&il->mutex);
5681 return;
5682 }
5683
5684 __il4965_up(il);
5685 mutex_unlock(&il->mutex);
5686 }
5687 }
5688
5689 static void
5690 il4965_bg_rx_replenish(struct work_struct *data)
5691 {
5692 struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
5693
5694 if (test_bit(S_EXIT_PENDING, &il->status))
5695 return;
5696
5697 mutex_lock(&il->mutex);
5698 il4965_rx_replenish(il);
5699 mutex_unlock(&il->mutex);
5700 }
5701
5702 /*****************************************************************************
5703 *
5704 * mac80211 entry point functions
5705 *
5706 *****************************************************************************/
5707
5708 #define UCODE_READY_TIMEOUT (4 * HZ)
5709
5710 /*
5711 * Not a mac80211 entry point function, but it fits in with all the
5712 * other mac80211 functions grouped here.
5713 */
5714 static int
5715 il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length)
5716 {
5717 int ret;
5718 struct ieee80211_hw *hw = il->hw;
5719
5720 hw->rate_control_algorithm = "iwl-4965-rs";
5721
5722 /* Tell mac80211 our characteristics */
5723 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
5724 ieee80211_hw_set(hw, SUPPORTS_PS);
5725 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
5726 ieee80211_hw_set(hw, SPECTRUM_MGMT);
5727 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
5728 ieee80211_hw_set(hw, SIGNAL_DBM);
5729 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
5730 if (il->cfg->sku & IL_SKU_N)
5731 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
5732 NL80211_FEATURE_STATIC_SMPS;
5733
5734 hw->sta_data_size = sizeof(struct il_station_priv);
5735 hw->vif_data_size = sizeof(struct il_vif_priv);
5736
5737 hw->wiphy->interface_modes =
5738 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
5739
5740 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
5741 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
5742 REGULATORY_DISABLE_BEACON_HINTS;
5743
5744 /*
5745 * For now, disable PS by default because it affects
5746 * RX performance significantly.
5747 */
5748 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
5749
5750 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
5751 /* we create the 802.11 header and a zero-length SSID element */
5752 hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2;
5753
5754 /* Default value; 4 EDCA QOS priorities */
5755 hw->queues = 4;
5756
5757 hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL;
5758
5759 if (il->bands[NL80211_BAND_2GHZ].n_channels)
5760 il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
5761 &il->bands[NL80211_BAND_2GHZ];
5762 if (il->bands[NL80211_BAND_5GHZ].n_channels)
5763 il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
5764 &il->bands[NL80211_BAND_5GHZ];
5765
5766 il_leds_init(il);
5767
5768 wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
5769
5770 ret = ieee80211_register_hw(il->hw);
5771 if (ret) {
5772 IL_ERR("Failed to register hw (error %d)\n", ret);
5773 return ret;
5774 }
5775 il->mac80211_registered = 1;
5776
5777 return 0;
5778 }
5779
5780 int
5781 il4965_mac_start(struct ieee80211_hw *hw)
5782 {
5783 struct il_priv *il = hw->priv;
5784 int ret;
5785
5786 D_MAC80211("enter\n");
5787
5788 /* we should be verifying the device is ready to be opened */
5789 mutex_lock(&il->mutex);
5790 ret = __il4965_up(il);
5791 mutex_unlock(&il->mutex);
5792
5793 if (ret)
5794 return ret;
5795
5796 if (il_is_rfkill(il))
5797 goto out;
5798
5799 D_INFO("Start UP work done.\n");
5800
5801 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
5802 * mac80211 will not be run successfully. */
5803 ret = wait_event_timeout(il->wait_command_queue,
5804 test_bit(S_READY, &il->status),
5805 UCODE_READY_TIMEOUT);
5806 if (!ret) {
5807 if (!test_bit(S_READY, &il->status)) {
5808 IL_ERR("START_ALIVE timeout after %dms.\n",
5809 jiffies_to_msecs(UCODE_READY_TIMEOUT));
5810 return -ETIMEDOUT;
5811 }
5812 }
5813
5814 il4965_led_enable(il);
5815
5816 out:
5817 il->is_open = 1;
5818 D_MAC80211("leave\n");
5819 return 0;
5820 }
5821
5822 void
5823 il4965_mac_stop(struct ieee80211_hw *hw, bool suspend)
5824 {
5825 struct il_priv *il = hw->priv;
5826
5827 D_MAC80211("enter\n");
5828
5829 if (!il->is_open)
5830 return;
5831
5832 il->is_open = 0;
5833
5834 il4965_down(il);
5835
5836 flush_workqueue(il->workqueue);
5837
5838 /* User space software may expect getting rfkill changes
5839 * even if interface is down */
5840 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5841 il_enable_rfkill_int(il);
5842
5843 D_MAC80211("leave\n");
5844 }
5845
5846 void
5847 il4965_mac_tx(struct ieee80211_hw *hw,
5848 struct ieee80211_tx_control *control,
5849 struct sk_buff *skb)
5850 {
5851 struct il_priv *il = hw->priv;
5852
5853 D_MACDUMP("enter\n");
5854
5855 D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5856 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
5857
5858 if (il4965_tx_skb(il, control->sta, skb))
5859 dev_kfree_skb_any(skb);
5860
5861 D_MACDUMP("leave\n");
5862 }
5863
5864 void
5865 il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5866 struct ieee80211_key_conf *keyconf,
5867 struct ieee80211_sta *sta, u32 iv32, u16 * phase1key)
5868 {
5869 struct il_priv *il = hw->priv;
5870
5871 D_MAC80211("enter\n");
5872
5873 il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key);
5874
5875 D_MAC80211("leave\n");
5876 }
5877
5878 int
5879 il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
5880 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
5881 struct ieee80211_key_conf *key)
5882 {
5883 struct il_priv *il = hw->priv;
5884 int ret;
5885 u8 sta_id;
5886 bool is_default_wep_key = false;
5887
5888 D_MAC80211("enter\n");
5889
5890 if (il->cfg->mod_params->sw_crypto) {
5891 D_MAC80211("leave - hwcrypto disabled\n");
5892 return -EOPNOTSUPP;
5893 }
5894
5895 /*
5896 * To support IBSS RSN, don't program group keys in IBSS, the
5897 * hardware will then not attempt to decrypt the frames.
5898 */
5899 if (vif->type == NL80211_IFTYPE_ADHOC &&
5900 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
5901 D_MAC80211("leave - ad-hoc group key\n");
5902 return -EOPNOTSUPP;
5903 }
5904
5905 sta_id = il_sta_id_or_broadcast(il, sta);
5906 if (sta_id == IL_INVALID_STATION)
5907 return -EINVAL;
5908
5909 mutex_lock(&il->mutex);
5910 il_scan_cancel_timeout(il, 100);
5911
5912 /*
5913 * If we are getting WEP group key and we didn't receive any key mapping
5914 * so far, we are in legacy wep mode (group key only), otherwise we are
5915 * in 1X mode.
5916 * In legacy wep mode, we use another host command to the uCode.
5917 */
5918 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
5919 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
5920 if (cmd == SET_KEY)
5921 is_default_wep_key = !il->_4965.key_mapping_keys;
5922 else
5923 is_default_wep_key =
5924 (key->hw_key_idx == HW_KEY_DEFAULT);
5925 }
5926
5927 switch (cmd) {
5928 case SET_KEY:
5929 if (is_default_wep_key)
5930 ret = il4965_set_default_wep_key(il, key);
5931 else
5932 ret = il4965_set_dynamic_key(il, key, sta_id);
5933
5934 D_MAC80211("enable hwcrypto key\n");
5935 break;
5936 case DISABLE_KEY:
5937 if (is_default_wep_key)
5938 ret = il4965_remove_default_wep_key(il, key);
5939 else
5940 ret = il4965_remove_dynamic_key(il, key, sta_id);
5941
5942 D_MAC80211("disable hwcrypto key\n");
5943 break;
5944 default:
5945 ret = -EINVAL;
5946 }
5947
5948 mutex_unlock(&il->mutex);
5949 D_MAC80211("leave\n");
5950
5951 return ret;
5952 }
5953
5954 int
5955 il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5956 struct ieee80211_ampdu_params *params)
5957 {
5958 struct il_priv *il = hw->priv;
5959 int ret = -EINVAL;
5960 struct ieee80211_sta *sta = params->sta;
5961 enum ieee80211_ampdu_mlme_action action = params->action;
5962 u16 tid = params->tid;
5963 u16 *ssn = &params->ssn;
5964
5965 D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid);
5966
5967 if (!(il->cfg->sku & IL_SKU_N))
5968 return -EACCES;
5969
5970 mutex_lock(&il->mutex);
5971
5972 switch (action) {
5973 case IEEE80211_AMPDU_RX_START:
5974 D_HT("start Rx\n");
5975 ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn);
5976 break;
5977 case IEEE80211_AMPDU_RX_STOP:
5978 D_HT("stop Rx\n");
5979 ret = il4965_sta_rx_agg_stop(il, sta, tid);
5980 if (test_bit(S_EXIT_PENDING, &il->status))
5981 ret = 0;
5982 break;
5983 case IEEE80211_AMPDU_TX_START:
5984 D_HT("start Tx\n");
5985 ret = il4965_tx_agg_start(il, vif, sta, tid, ssn);
5986 break;
5987 case IEEE80211_AMPDU_TX_STOP_CONT:
5988 case IEEE80211_AMPDU_TX_STOP_FLUSH:
5989 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5990 D_HT("stop Tx\n");
5991 ret = il4965_tx_agg_stop(il, vif, sta, tid);
5992 if (test_bit(S_EXIT_PENDING, &il->status))
5993 ret = 0;
5994 break;
5995 case IEEE80211_AMPDU_TX_OPERATIONAL:
5996 ret = 0;
5997 break;
5998 }
5999 mutex_unlock(&il->mutex);
6000
6001 return ret;
6002 }
6003
6004 int
6005 il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6006 struct ieee80211_sta *sta)
6007 {
6008 struct il_priv *il = hw->priv;
6009 struct il_station_priv *sta_priv = (void *)sta->drv_priv;
6010 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
6011 int ret;
6012 u8 sta_id;
6013
6014 D_INFO("received request to add station %pM\n", sta->addr);
6015 mutex_lock(&il->mutex);
6016 D_INFO("proceeding to add station %pM\n", sta->addr);
6017 sta_priv->common.sta_id = IL_INVALID_STATION;
6018
6019 atomic_set(&sta_priv->pending_frames, 0);
6020
6021 ret =
6022 il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
6023 if (ret) {
6024 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
6025 /* Should we return success if return code is EEXIST ? */
6026 mutex_unlock(&il->mutex);
6027 return ret;
6028 }
6029
6030 sta_priv->common.sta_id = sta_id;
6031
6032 /* Initialize rate scaling */
6033 D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
6034 il4965_rs_rate_init(il, sta, sta_id);
6035 mutex_unlock(&il->mutex);
6036
6037 return 0;
6038 }
6039
6040 void
6041 il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6042 struct ieee80211_channel_switch *ch_switch)
6043 {
6044 struct il_priv *il = hw->priv;
6045 const struct il_channel_info *ch_info;
6046 struct ieee80211_conf *conf = &hw->conf;
6047 struct ieee80211_channel *channel = ch_switch->chandef.chan;
6048 struct il_ht_config *ht_conf = &il->current_ht_config;
6049 u16 ch;
6050
6051 D_MAC80211("enter\n");
6052
6053 mutex_lock(&il->mutex);
6054
6055 if (il_is_rfkill(il))
6056 goto out;
6057
6058 if (test_bit(S_EXIT_PENDING, &il->status) ||
6059 test_bit(S_SCANNING, &il->status) ||
6060 test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
6061 goto out;
6062
6063 if (!il_is_associated(il))
6064 goto out;
6065
6066 if (!il->ops->set_channel_switch)
6067 goto out;
6068
6069 ch = channel->hw_value;
6070 if (le16_to_cpu(il->active.channel) == ch)
6071 goto out;
6072
6073 ch_info = il_get_channel_info(il, channel->band, ch);
6074 if (!il_is_channel_valid(ch_info)) {
6075 D_MAC80211("invalid channel\n");
6076 goto out;
6077 }
6078
6079 spin_lock_irq(&il->lock);
6080
6081 il->current_ht_config.smps = conf->smps_mode;
6082
6083 /* Configure HT40 channels */
6084 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
6085 case NL80211_CHAN_NO_HT:
6086 case NL80211_CHAN_HT20:
6087 il->ht.is_40mhz = false;
6088 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
6089 break;
6090 case NL80211_CHAN_HT40MINUS:
6091 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
6092 il->ht.is_40mhz = true;
6093 break;
6094 case NL80211_CHAN_HT40PLUS:
6095 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
6096 il->ht.is_40mhz = true;
6097 break;
6098 }
6099
6100 if ((le16_to_cpu(il->staging.channel) != ch))
6101 il->staging.flags = 0;
6102
6103 il_set_rxon_channel(il, channel);
6104 il_set_rxon_ht(il, ht_conf);
6105 il_set_flags_for_band(il, channel->band, il->vif);
6106
6107 spin_unlock_irq(&il->lock);
6108
6109 il_set_rate(il);
6110 /*
6111 * at this point, staging_rxon has the
6112 * configuration for channel switch
6113 */
6114 set_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6115 il->switch_channel = cpu_to_le16(ch);
6116 if (il->ops->set_channel_switch(il, ch_switch)) {
6117 clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6118 il->switch_channel = 0;
6119 ieee80211_chswitch_done(il->vif, false, 0);
6120 }
6121
6122 out:
6123 mutex_unlock(&il->mutex);
6124 D_MAC80211("leave\n");
6125 }
6126
6127 void
6128 il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
6129 unsigned int *total_flags, u64 multicast)
6130 {
6131 struct il_priv *il = hw->priv;
6132 __le32 filter_or = 0, filter_nand = 0;
6133
6134 #define CHK(test, flag) do { \
6135 if (*total_flags & (test)) \
6136 filter_or |= (flag); \
6137 else \
6138 filter_nand |= (flag); \
6139 } while (0)
6140
6141 D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
6142 *total_flags);
6143
6144 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
6145 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
6146 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
6147 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
6148
6149 #undef CHK
6150
6151 mutex_lock(&il->mutex);
6152
6153 il->staging.filter_flags &= ~filter_nand;
6154 il->staging.filter_flags |= filter_or;
6155
6156 /*
6157 * Not committing directly because hardware can perform a scan,
6158 * but we'll eventually commit the filter flags change anyway.
6159 */
6160
6161 mutex_unlock(&il->mutex);
6162
6163 /*
6164 * Receiving all multicast frames is always enabled by the
6165 * default flags setup in il_connection_init_rx_config()
6166 * since we currently do not support programming multicast
6167 * filters into the device.
6168 */
6169 *total_flags &=
6170 FIF_OTHER_BSS | FIF_ALLMULTI |
6171 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6172 }
6173
6174 /*****************************************************************************
6175 *
6176 * driver setup and teardown
6177 *
6178 *****************************************************************************/
6179
6180 static void
6181 il4965_bg_txpower_work(struct work_struct *work)
6182 {
6183 struct il_priv *il = container_of(work, struct il_priv,
6184 txpower_work);
6185
6186 mutex_lock(&il->mutex);
6187
6188 /* If a scan happened to start before we got here
6189 * then just return; the stats notification will
6190 * kick off another scheduled work to compensate for
6191 * any temperature delta we missed here. */
6192 if (test_bit(S_EXIT_PENDING, &il->status) ||
6193 test_bit(S_SCANNING, &il->status))
6194 goto out;
6195
6196 /* Regardless of if we are associated, we must reconfigure the
6197 * TX power since frames can be sent on non-radar channels while
6198 * not associated */
6199 il->ops->send_tx_power(il);
6200
6201 /* Update last_temperature to keep is_calib_needed from running
6202 * when it isn't needed... */
6203 il->last_temperature = il->temperature;
6204 out:
6205 mutex_unlock(&il->mutex);
6206 }
6207
6208 static int
6209 il4965_setup_deferred_work(struct il_priv *il)
6210 {
6211 il->workqueue = create_singlethread_workqueue(DRV_NAME);
6212 if (!il->workqueue)
6213 return -ENOMEM;
6214
6215 init_waitqueue_head(&il->wait_command_queue);
6216
6217 INIT_WORK(&il->restart, il4965_bg_restart);
6218 INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish);
6219 INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work);
6220 INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start);
6221 INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start);
6222
6223 il_setup_scan_deferred_work(il);
6224
6225 INIT_WORK(&il->txpower_work, il4965_bg_txpower_work);
6226
6227 timer_setup(&il->stats_periodic, il4965_bg_stats_periodic, 0);
6228
6229 timer_setup(&il->watchdog, il_bg_watchdog, 0);
6230
6231 tasklet_setup(&il->irq_tasklet, il4965_irq_tasklet);
6232
6233 return 0;
6234 }
6235
6236 static void
6237 il4965_cancel_deferred_work(struct il_priv *il)
6238 {
6239 cancel_work_sync(&il->txpower_work);
6240 cancel_delayed_work_sync(&il->init_alive_start);
6241 cancel_delayed_work(&il->alive_start);
6242 cancel_work_sync(&il->run_time_calib_work);
6243
6244 il_cancel_scan_deferred_work(il);
6245
6246 del_timer_sync(&il->stats_periodic);
6247 }
6248
6249 static void
6250 il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
6251 {
6252 int i;
6253
6254 for (i = 0; i < RATE_COUNT_LEGACY; i++) {
6255 rates[i].bitrate = il_rates[i].ieee * 5;
6256 rates[i].hw_value = i; /* Rate scaling will work on idxes */
6257 rates[i].hw_value_short = i;
6258 rates[i].flags = 0;
6259 if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) {
6260 /*
6261 * If CCK != 1M then set short preamble rate flag.
6262 */
6263 rates[i].flags |=
6264 (il_rates[i].plcp ==
6265 RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
6266 }
6267 }
6268 }
6269
6270 /*
6271 * Acquire il->lock before calling this function !
6272 */
6273 void
6274 il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx)
6275 {
6276 il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8));
6277 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx);
6278 }
6279
6280 void
6281 il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq,
6282 int tx_fifo_id, int scd_retry)
6283 {
6284 int txq_id = txq->q.id;
6285
6286 /* Find out whether to activate Tx queue */
6287 int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0;
6288
6289 /* Set up and activate */
6290 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
6291 (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
6292 (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) |
6293 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) |
6294 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
6295 IL49_SCD_QUEUE_STTS_REG_MSK);
6296
6297 txq->sched_retry = scd_retry;
6298
6299 D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate",
6300 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
6301 }
6302
6303 static const struct ieee80211_ops il4965_mac_ops = {
6304 .add_chanctx = ieee80211_emulate_add_chanctx,
6305 .remove_chanctx = ieee80211_emulate_remove_chanctx,
6306 .change_chanctx = ieee80211_emulate_change_chanctx,
6307 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
6308 .tx = il4965_mac_tx,
6309 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
6310 .start = il4965_mac_start,
6311 .stop = il4965_mac_stop,
6312 .add_interface = il_mac_add_interface,
6313 .remove_interface = il_mac_remove_interface,
6314 .change_interface = il_mac_change_interface,
6315 .config = il_mac_config,
6316 .configure_filter = il4965_configure_filter,
6317 .set_key = il4965_mac_set_key,
6318 .update_tkip_key = il4965_mac_update_tkip_key,
6319 .conf_tx = il_mac_conf_tx,
6320 .reset_tsf = il_mac_reset_tsf,
6321 .bss_info_changed = il_mac_bss_info_changed,
6322 .ampdu_action = il4965_mac_ampdu_action,
6323 .hw_scan = il_mac_hw_scan,
6324 .sta_add = il4965_mac_sta_add,
6325 .sta_remove = il_mac_sta_remove,
6326 .channel_switch = il4965_mac_channel_switch,
6327 .tx_last_beacon = il_mac_tx_last_beacon,
6328 .flush = il_mac_flush,
6329 };
6330
6331 static int
6332 il4965_init_drv(struct il_priv *il)
6333 {
6334 int ret;
6335
6336 spin_lock_init(&il->sta_lock);
6337 spin_lock_init(&il->hcmd_lock);
6338
6339 INIT_LIST_HEAD(&il->free_frames);
6340
6341 mutex_init(&il->mutex);
6342
6343 il->ieee_channels = NULL;
6344 il->ieee_rates = NULL;
6345 il->band = NL80211_BAND_2GHZ;
6346
6347 il->iw_mode = NL80211_IFTYPE_STATION;
6348 il->current_ht_config.smps = IEEE80211_SMPS_STATIC;
6349 il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
6350
6351 /* initialize force reset */
6352 il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
6353
6354 /* Choose which receivers/antennas to use */
6355 if (il->ops->set_rxon_chain)
6356 il->ops->set_rxon_chain(il);
6357
6358 il_init_scan_params(il);
6359
6360 ret = il_init_channel_map(il);
6361 if (ret) {
6362 IL_ERR("initializing regulatory failed: %d\n", ret);
6363 goto err;
6364 }
6365
6366 ret = il_init_geos(il);
6367 if (ret) {
6368 IL_ERR("initializing geos failed: %d\n", ret);
6369 goto err_free_channel_map;
6370 }
6371 il4965_init_hw_rates(il, il->ieee_rates);
6372
6373 return 0;
6374
6375 err_free_channel_map:
6376 il_free_channel_map(il);
6377 err:
6378 return ret;
6379 }
6380
6381 static void
6382 il4965_uninit_drv(struct il_priv *il)
6383 {
6384 il_free_geos(il);
6385 il_free_channel_map(il);
6386 kfree(il->scan_cmd);
6387 }
6388
6389 static void
6390 il4965_hw_detect(struct il_priv *il)
6391 {
6392 il->hw_rev = _il_rd(il, CSR_HW_REV);
6393 il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG);
6394 il->rev_id = il->pci_dev->revision;
6395 D_INFO("HW Revision ID = 0x%X\n", il->rev_id);
6396 }
6397
6398 static const struct il_sensitivity_ranges il4965_sensitivity = {
6399 .min_nrg_cck = 97,
6400 .max_nrg_cck = 0, /* not used, set to 0 */
6401
6402 .auto_corr_min_ofdm = 85,
6403 .auto_corr_min_ofdm_mrc = 170,
6404 .auto_corr_min_ofdm_x1 = 105,
6405 .auto_corr_min_ofdm_mrc_x1 = 220,
6406
6407 .auto_corr_max_ofdm = 120,
6408 .auto_corr_max_ofdm_mrc = 210,
6409 .auto_corr_max_ofdm_x1 = 140,
6410 .auto_corr_max_ofdm_mrc_x1 = 270,
6411
6412 .auto_corr_min_cck = 125,
6413 .auto_corr_max_cck = 200,
6414 .auto_corr_min_cck_mrc = 200,
6415 .auto_corr_max_cck_mrc = 400,
6416
6417 .nrg_th_cck = 100,
6418 .nrg_th_ofdm = 100,
6419
6420 .barker_corr_th_min = 190,
6421 .barker_corr_th_min_mrc = 390,
6422 .nrg_th_cca = 62,
6423 };
6424
6425 static void
6426 il4965_set_hw_params(struct il_priv *il)
6427 {
6428 il->hw_params.bcast_id = IL4965_BROADCAST_ID;
6429 il->hw_params.max_rxq_size = RX_QUEUE_SIZE;
6430 il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
6431 if (il->cfg->mod_params->amsdu_size_8K)
6432 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K);
6433 else
6434 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K);
6435
6436 il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL;
6437
6438 if (il->cfg->mod_params->disable_11n)
6439 il->cfg->sku &= ~IL_SKU_N;
6440
6441 if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES &&
6442 il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES)
6443 il->cfg->num_of_queues =
6444 il->cfg->mod_params->num_of_queues;
6445
6446 il->hw_params.max_txq_num = il->cfg->num_of_queues;
6447 il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
6448 il->hw_params.scd_bc_tbls_size =
6449 il->cfg->num_of_queues *
6450 sizeof(struct il4965_scd_bc_tbl);
6451
6452 il->hw_params.tfd_size = sizeof(struct il_tfd);
6453 il->hw_params.max_stations = IL4965_STATION_COUNT;
6454 il->hw_params.max_data_size = IL49_RTC_DATA_SIZE;
6455 il->hw_params.max_inst_size = IL49_RTC_INST_SIZE;
6456 il->hw_params.max_bsm_size = BSM_SRAM_SIZE;
6457 il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ);
6458
6459 il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR;
6460
6461 il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant);
6462 il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant);
6463 il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant;
6464 il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant;
6465
6466 il->hw_params.ct_kill_threshold =
6467 celsius_to_kelvin(CT_KILL_THRESHOLD_LEGACY);
6468
6469 il->hw_params.sens = &il4965_sensitivity;
6470 il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS;
6471 }
6472
6473 static int
6474 il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6475 {
6476 int err = 0;
6477 struct il_priv *il;
6478 struct ieee80211_hw *hw;
6479 struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
6480 unsigned long flags;
6481 u16 pci_cmd;
6482
6483 /************************
6484 * 1. Allocating HW data
6485 ************************/
6486
6487 hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops);
6488 if (!hw) {
6489 err = -ENOMEM;
6490 goto out;
6491 }
6492 il = hw->priv;
6493 il->hw = hw;
6494 SET_IEEE80211_DEV(hw, &pdev->dev);
6495
6496 D_INFO("*** LOAD DRIVER ***\n");
6497 il->cfg = cfg;
6498 il->ops = &il4965_ops;
6499 #ifdef CONFIG_IWLEGACY_DEBUGFS
6500 il->debugfs_ops = &il4965_debugfs_ops;
6501 #endif
6502 il->pci_dev = pdev;
6503 il->inta_mask = CSR_INI_SET_MASK;
6504
6505 /**************************
6506 * 2. Initializing PCI bus
6507 **************************/
6508 pci_disable_link_state(pdev,
6509 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
6510 PCIE_LINK_STATE_CLKPM);
6511
6512 if (pci_enable_device(pdev)) {
6513 err = -ENODEV;
6514 goto out_ieee80211_free_hw;
6515 }
6516
6517 pci_set_master(pdev);
6518
6519 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36));
6520 if (err) {
6521 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
6522 /* both attempts failed: */
6523 if (err) {
6524 IL_WARN("No suitable DMA available.\n");
6525 goto out_pci_disable_device;
6526 }
6527 }
6528
6529 err = pci_request_regions(pdev, DRV_NAME);
6530 if (err)
6531 goto out_pci_disable_device;
6532
6533 pci_set_drvdata(pdev, il);
6534
6535 /***********************
6536 * 3. Read REV register
6537 ***********************/
6538 il->hw_base = pci_ioremap_bar(pdev, 0);
6539 if (!il->hw_base) {
6540 err = -ENODEV;
6541 goto out_pci_release_regions;
6542 }
6543
6544 D_INFO("pci_resource_len = 0x%08llx\n",
6545 (unsigned long long)pci_resource_len(pdev, 0));
6546 D_INFO("pci_resource_base = %p\n", il->hw_base);
6547
6548 /* these spin locks will be used in apm_ops.init and EEPROM access
6549 * we should init now
6550 */
6551 spin_lock_init(&il->reg_lock);
6552 spin_lock_init(&il->lock);
6553
6554 /*
6555 * stop and reset the on-board processor just in case it is in a
6556 * strange state ... like being left stranded by a primary kernel
6557 * and this is now the kdump kernel trying to start up
6558 */
6559 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6560
6561 il4965_hw_detect(il);
6562 IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev);
6563
6564 /* We disable the RETRY_TIMEOUT register (0x41) to keep
6565 * PCI Tx retries from interfering with C3 CPU state */
6566 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
6567
6568 il4965_prepare_card_hw(il);
6569 if (!il->hw_ready) {
6570 IL_WARN("Failed, HW not ready\n");
6571 err = -EIO;
6572 goto out_iounmap;
6573 }
6574
6575 /*****************
6576 * 4. Read EEPROM
6577 *****************/
6578 /* Read the EEPROM */
6579 err = il_eeprom_init(il);
6580 if (err) {
6581 IL_ERR("Unable to init EEPROM\n");
6582 goto out_iounmap;
6583 }
6584 err = il4965_eeprom_check_version(il);
6585 if (err)
6586 goto out_free_eeprom;
6587
6588 /* extract MAC Address */
6589 il4965_eeprom_get_mac(il, il->addresses[0].addr);
6590 D_INFO("MAC address: %pM\n", il->addresses[0].addr);
6591 il->hw->wiphy->addresses = il->addresses;
6592 il->hw->wiphy->n_addresses = 1;
6593
6594 /************************
6595 * 5. Setup HW constants
6596 ************************/
6597 il4965_set_hw_params(il);
6598
6599 /*******************
6600 * 6. Setup il
6601 *******************/
6602
6603 err = il4965_init_drv(il);
6604 if (err)
6605 goto out_free_eeprom;
6606 /* At this point both hw and il are initialized. */
6607
6608 /********************
6609 * 7. Setup services
6610 ********************/
6611 spin_lock_irqsave(&il->lock, flags);
6612 il_disable_interrupts(il);
6613 spin_unlock_irqrestore(&il->lock, flags);
6614
6615 pci_enable_msi(il->pci_dev);
6616
6617 err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
6618 if (err) {
6619 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
6620 goto out_disable_msi;
6621 }
6622
6623 err = il4965_setup_deferred_work(il);
6624 if (err)
6625 goto out_free_irq;
6626
6627 il4965_setup_handlers(il);
6628
6629 /*********************************************
6630 * 8. Enable interrupts and read RFKILL state
6631 *********************************************/
6632
6633 /* enable rfkill interrupt: hw bug w/a */
6634 pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd);
6635 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
6636 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
6637 pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd);
6638 }
6639
6640 il_enable_rfkill_int(il);
6641
6642 /* If platform's RF_KILL switch is NOT set to KILL */
6643 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6644 clear_bit(S_RFKILL, &il->status);
6645 else
6646 set_bit(S_RFKILL, &il->status);
6647
6648 wiphy_rfkill_set_hw_state(il->hw->wiphy,
6649 test_bit(S_RFKILL, &il->status));
6650
6651 il_power_initialize(il);
6652
6653 init_completion(&il->_4965.firmware_loading_complete);
6654
6655 err = il4965_request_firmware(il, true);
6656 if (err)
6657 goto out_destroy_workqueue;
6658
6659 return 0;
6660
6661 out_destroy_workqueue:
6662 destroy_workqueue(il->workqueue);
6663 il->workqueue = NULL;
6664 out_free_irq:
6665 free_irq(il->pci_dev->irq, il);
6666 out_disable_msi:
6667 pci_disable_msi(il->pci_dev);
6668 il4965_uninit_drv(il);
6669 out_free_eeprom:
6670 il_eeprom_free(il);
6671 out_iounmap:
6672 iounmap(il->hw_base);
6673 out_pci_release_regions:
6674 pci_release_regions(pdev);
6675 out_pci_disable_device:
6676 pci_disable_device(pdev);
6677 out_ieee80211_free_hw:
6678 ieee80211_free_hw(il->hw);
6679 out:
6680 return err;
6681 }
6682
6683 static void
6684 il4965_pci_remove(struct pci_dev *pdev)
6685 {
6686 struct il_priv *il = pci_get_drvdata(pdev);
6687 unsigned long flags;
6688
6689 if (!il)
6690 return;
6691
6692 wait_for_completion(&il->_4965.firmware_loading_complete);
6693
6694 D_INFO("*** UNLOAD DRIVER ***\n");
6695
6696 il_dbgfs_unregister(il);
6697 sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group);
6698
6699 /* ieee80211_unregister_hw call wil cause il_mac_stop to
6700 * be called and il4965_down since we are removing the device
6701 * we need to set S_EXIT_PENDING bit.
6702 */
6703 set_bit(S_EXIT_PENDING, &il->status);
6704
6705 il_leds_exit(il);
6706
6707 if (il->mac80211_registered) {
6708 ieee80211_unregister_hw(il->hw);
6709 il->mac80211_registered = 0;
6710 } else {
6711 il4965_down(il);
6712 }
6713
6714 /*
6715 * Make sure device is reset to low power before unloading driver.
6716 * This may be redundant with il4965_down(), but there are paths to
6717 * run il4965_down() without calling apm_ops.stop(), and there are
6718 * paths to avoid running il4965_down() at all before leaving driver.
6719 * This (inexpensive) call *makes sure* device is reset.
6720 */
6721 il_apm_stop(il);
6722
6723 /* make sure we flush any pending irq or
6724 * tasklet for the driver
6725 */
6726 spin_lock_irqsave(&il->lock, flags);
6727 il_disable_interrupts(il);
6728 spin_unlock_irqrestore(&il->lock, flags);
6729
6730 il4965_synchronize_irq(il);
6731
6732 il4965_dealloc_ucode_pci(il);
6733
6734 if (il->rxq.bd)
6735 il4965_rx_queue_free(il, &il->rxq);
6736 il4965_hw_txq_ctx_free(il);
6737
6738 il_eeprom_free(il);
6739
6740 /*netif_stop_queue(dev); */
6741
6742 /* ieee80211_unregister_hw calls il_mac_stop, which flushes
6743 * il->workqueue... so we can't take down the workqueue
6744 * until now... */
6745 destroy_workqueue(il->workqueue);
6746 il->workqueue = NULL;
6747
6748 free_irq(il->pci_dev->irq, il);
6749 pci_disable_msi(il->pci_dev);
6750 iounmap(il->hw_base);
6751 pci_release_regions(pdev);
6752 pci_disable_device(pdev);
6753
6754 il4965_uninit_drv(il);
6755
6756 dev_kfree_skb(il->beacon_skb);
6757
6758 ieee80211_free_hw(il->hw);
6759 }
6760
6761 /*
6762 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
6763 * must be called under il->lock and mac access
6764 */
6765 void
6766 il4965_txq_set_sched(struct il_priv *il, u32 mask)
6767 {
6768 il_wr_prph(il, IL49_SCD_TXFACT, mask);
6769 }
6770
6771 /*****************************************************************************
6772 *
6773 * driver and module entry point
6774 *
6775 *****************************************************************************/
6776
6777 /* Hardware specific file defines the PCI IDs table for that hardware module */
6778 static const struct pci_device_id il4965_hw_card_ids[] = {
6779 {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)},
6780 {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)},
6781 {0}
6782 };
6783 MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids);
6784
6785 static struct pci_driver il4965_driver = {
6786 .name = DRV_NAME,
6787 .id_table = il4965_hw_card_ids,
6788 .probe = il4965_pci_probe,
6789 .remove = il4965_pci_remove,
6790 .driver.pm = IL_LEGACY_PM_OPS,
6791 };
6792
6793 static int __init
6794 il4965_init(void)
6795 {
6796
6797 int ret;
6798 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
6799 pr_info(DRV_COPYRIGHT "\n");
6800
6801 ret = il4965_rate_control_register();
6802 if (ret) {
6803 pr_err("Unable to register rate control algorithm: %d\n", ret);
6804 return ret;
6805 }
6806
6807 ret = pci_register_driver(&il4965_driver);
6808 if (ret) {
6809 pr_err("Unable to initialize PCI module\n");
6810 goto error_register;
6811 }
6812
6813 return ret;
6814
6815 error_register:
6816 il4965_rate_control_unregister();
6817 return ret;
6818 }
6819
6820 static void __exit
6821 il4965_exit(void)
6822 {
6823 pci_unregister_driver(&il4965_driver);
6824 il4965_rate_control_unregister();
6825 }
6826
6827 module_exit(il4965_exit);
6828 module_init(il4965_init);
6829
6830 #ifdef CONFIG_IWLEGACY_DEBUG
6831 module_param_named(debug, il_debug_level, uint, 0644);
6832 MODULE_PARM_DESC(debug, "debug output mask");
6833 #endif
6834
6835 module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, 0444);
6836 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
6837 module_param_named(queues_num, il4965_mod_params.num_of_queues, int, 0444);
6838 MODULE_PARM_DESC(queues_num, "number of hw queues.");
6839 module_param_named(11n_disable, il4965_mod_params.disable_11n, int, 0444);
6840 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
6841 module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 0444);
6842 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])");
6843 module_param_named(fw_restart, il4965_mod_params.restart_fw, int, 0444);
6844 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
Kernel DRM miscellaneous fixes and cross-tree changes