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i2c: gpio: fault-injector: refactor incomplete transfer
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlegacy / 4965-mac.c
blob562e94870a9c66f6a94e37c0bda696ae49c01c3a
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
32 #include <linux/kernel.h>
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/pci.h>
36 #include <linux/pci-aspm.h>
37 #include <linux/slab.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/delay.h>
40 #include <linux/sched.h>
41 #include <linux/skbuff.h>
42 #include <linux/netdevice.h>
43 #include <linux/firmware.h>
44 #include <linux/etherdevice.h>
45 #include <linux/if_arp.h>
46
47 #include <net/mac80211.h>
48
49 #include <asm/div64.h>
50
51 #define DRV_NAME "iwl4965"
52
53 #include "common.h"
54 #include "4965.h"
55
56 /******************************************************************************
57 *
58 * module boiler plate
59 *
60 ******************************************************************************/
61
62 /*
63 * module name, copyright, version, etc.
64 */
65 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux"
66
67 #ifdef CONFIG_IWLEGACY_DEBUG
68 #define VD "d"
69 #else
70 #define VD
71 #endif
72
73 #define DRV_VERSION IWLWIFI_VERSION VD
74
75 MODULE_DESCRIPTION(DRV_DESCRIPTION);
76 MODULE_VERSION(DRV_VERSION);
77 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
78 MODULE_LICENSE("GPL");
79 MODULE_ALIAS("iwl4965");
80
81 void
82 il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status)
83 {
84 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
85 IL_ERR("Tx flush command to flush out all frames\n");
86 if (!test_bit(S_EXIT_PENDING, &il->status))
87 queue_work(il->workqueue, &il->tx_flush);
88 }
89 }
90
91 /*
92 * EEPROM
93 */
94 struct il_mod_params il4965_mod_params = {
95 .restart_fw = 1,
96 /* the rest are 0 by default */
97 };
98
99 void
100 il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
101 {
102 unsigned long flags;
103 int i;
104 spin_lock_irqsave(&rxq->lock, flags);
105 INIT_LIST_HEAD(&rxq->rx_free);
106 INIT_LIST_HEAD(&rxq->rx_used);
107 /* Fill the rx_used queue with _all_ of the Rx buffers */
108 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
109 /* In the reset function, these buffers may have been allocated
110 * to an SKB, so we need to unmap and free potential storage */
111 if (rxq->pool[i].page != NULL) {
112 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
113 PAGE_SIZE << il->hw_params.rx_page_order,
114 PCI_DMA_FROMDEVICE);
115 __il_free_pages(il, rxq->pool[i].page);
116 rxq->pool[i].page = NULL;
117 }
118 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
119 }
120
121 for (i = 0; i < RX_QUEUE_SIZE; i++)
122 rxq->queue[i] = NULL;
123
124 /* Set us so that we have processed and used all buffers, but have
125 * not restocked the Rx queue with fresh buffers */
126 rxq->read = rxq->write = 0;
127 rxq->write_actual = 0;
128 rxq->free_count = 0;
129 spin_unlock_irqrestore(&rxq->lock, flags);
130 }
131
132 int
133 il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
134 {
135 u32 rb_size;
136 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
137 u32 rb_timeout = 0;
138
139 if (il->cfg->mod_params->amsdu_size_8K)
140 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
141 else
142 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
143
144 /* Stop Rx DMA */
145 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
146
147 /* Reset driver's Rx queue write idx */
148 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
149
150 /* Tell device where to find RBD circular buffer in DRAM */
151 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8));
152
153 /* Tell device where in DRAM to update its Rx status */
154 il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4);
155
156 /* Enable Rx DMA
157 * Direct rx interrupts to hosts
158 * Rx buffer size 4 or 8k
159 * RB timeout 0x10
160 * 256 RBDs
161 */
162 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG,
163 FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
164 FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
165 FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
166 rb_size |
167 (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) |
168 (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
169
170 /* Set interrupt coalescing timer to default (2048 usecs) */
171 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF);
172
173 return 0;
174 }
175
176 static void
177 il4965_set_pwr_vmain(struct il_priv *il)
178 {
179 /*
180 * (for documentation purposes)
181 * to set power to V_AUX, do:
182
183 if (pci_pme_capable(il->pci_dev, PCI_D3cold))
184 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
185 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
186 ~APMG_PS_CTRL_MSK_PWR_SRC);
187 */
188
189 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
190 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
191 ~APMG_PS_CTRL_MSK_PWR_SRC);
192 }
193
194 int
195 il4965_hw_nic_init(struct il_priv *il)
196 {
197 unsigned long flags;
198 struct il_rx_queue *rxq = &il->rxq;
199 int ret;
200
201 spin_lock_irqsave(&il->lock, flags);
202 il_apm_init(il);
203 /* Set interrupt coalescing calibration timer to default (512 usecs) */
204 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF);
205 spin_unlock_irqrestore(&il->lock, flags);
206
207 il4965_set_pwr_vmain(il);
208 il4965_nic_config(il);
209
210 /* Allocate the RX queue, or reset if it is already allocated */
211 if (!rxq->bd) {
212 ret = il_rx_queue_alloc(il);
213 if (ret) {
214 IL_ERR("Unable to initialize Rx queue\n");
215 return -ENOMEM;
216 }
217 } else
218 il4965_rx_queue_reset(il, rxq);
219
220 il4965_rx_replenish(il);
221
222 il4965_rx_init(il, rxq);
223
224 spin_lock_irqsave(&il->lock, flags);
225
226 rxq->need_update = 1;
227 il_rx_queue_update_write_ptr(il, rxq);
228
229 spin_unlock_irqrestore(&il->lock, flags);
230
231 /* Allocate or reset and init all Tx and Command queues */
232 if (!il->txq) {
233 ret = il4965_txq_ctx_alloc(il);
234 if (ret)
235 return ret;
236 } else
237 il4965_txq_ctx_reset(il);
238
239 set_bit(S_INIT, &il->status);
240
241 return 0;
242 }
243
244 /**
245 * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
246 */
247 static inline __le32
248 il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
249 {
250 return cpu_to_le32((u32) (dma_addr >> 8));
251 }
252
253 /**
254 * il4965_rx_queue_restock - refill RX queue from pre-allocated pool
255 *
256 * If there are slots in the RX queue that need to be restocked,
257 * and we have free pre-allocated buffers, fill the ranks as much
258 * as we can, pulling from rx_free.
259 *
260 * This moves the 'write' idx forward to catch up with 'processed', and
261 * also updates the memory address in the firmware to reference the new
262 * target buffer.
263 */
264 void
265 il4965_rx_queue_restock(struct il_priv *il)
266 {
267 struct il_rx_queue *rxq = &il->rxq;
268 struct list_head *element;
269 struct il_rx_buf *rxb;
270 unsigned long flags;
271
272 spin_lock_irqsave(&rxq->lock, flags);
273 while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
274 /* The overwritten rxb must be a used one */
275 rxb = rxq->queue[rxq->write];
276 BUG_ON(rxb && rxb->page);
277
278 /* Get next free Rx buffer, remove from free list */
279 element = rxq->rx_free.next;
280 rxb = list_entry(element, struct il_rx_buf, list);
281 list_del(element);
282
283 /* Point to Rx buffer via next RBD in circular buffer */
284 rxq->bd[rxq->write] =
285 il4965_dma_addr2rbd_ptr(il, rxb->page_dma);
286 rxq->queue[rxq->write] = rxb;
287 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
288 rxq->free_count--;
289 }
290 spin_unlock_irqrestore(&rxq->lock, flags);
291 /* If the pre-allocated buffer pool is dropping low, schedule to
292 * refill it */
293 if (rxq->free_count <= RX_LOW_WATERMARK)
294 queue_work(il->workqueue, &il->rx_replenish);
295
296 /* If we've added more space for the firmware to place data, tell it.
297 * Increment device's write pointer in multiples of 8. */
298 if (rxq->write_actual != (rxq->write & ~0x7)) {
299 spin_lock_irqsave(&rxq->lock, flags);
300 rxq->need_update = 1;
301 spin_unlock_irqrestore(&rxq->lock, flags);
302 il_rx_queue_update_write_ptr(il, rxq);
303 }
304 }
305
306 /**
307 * il4965_rx_replenish - Move all used packet from rx_used to rx_free
308 *
309 * When moving to rx_free an SKB is allocated for the slot.
310 *
311 * Also restock the Rx queue via il_rx_queue_restock.
312 * This is called as a scheduled work item (except for during initialization)
313 */
314 static void
315 il4965_rx_allocate(struct il_priv *il, gfp_t priority)
316 {
317 struct il_rx_queue *rxq = &il->rxq;
318 struct list_head *element;
319 struct il_rx_buf *rxb;
320 struct page *page;
321 dma_addr_t page_dma;
322 unsigned long flags;
323 gfp_t gfp_mask = priority;
324
325 while (1) {
326 spin_lock_irqsave(&rxq->lock, flags);
327 if (list_empty(&rxq->rx_used)) {
328 spin_unlock_irqrestore(&rxq->lock, flags);
329 return;
330 }
331 spin_unlock_irqrestore(&rxq->lock, flags);
332
333 if (rxq->free_count > RX_LOW_WATERMARK)
334 gfp_mask |= __GFP_NOWARN;
335
336 if (il->hw_params.rx_page_order > 0)
337 gfp_mask |= __GFP_COMP;
338
339 /* Alloc a new receive buffer */
340 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
341 if (!page) {
342 if (net_ratelimit())
343 D_INFO("alloc_pages failed, " "order: %d\n",
344 il->hw_params.rx_page_order);
345
346 if (rxq->free_count <= RX_LOW_WATERMARK &&
347 net_ratelimit())
348 IL_ERR("Failed to alloc_pages with %s. "
349 "Only %u free buffers remaining.\n",
350 priority ==
351 GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
352 rxq->free_count);
353 /* We don't reschedule replenish work here -- we will
354 * call the restock method and if it still needs
355 * more buffers it will schedule replenish */
356 return;
357 }
358
359 /* Get physical address of the RB */
360 page_dma =
361 pci_map_page(il->pci_dev, page, 0,
362 PAGE_SIZE << il->hw_params.rx_page_order,
363 PCI_DMA_FROMDEVICE);
364 if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) {
365 __free_pages(page, il->hw_params.rx_page_order);
366 break;
367 }
368
369 spin_lock_irqsave(&rxq->lock, flags);
370
371 if (list_empty(&rxq->rx_used)) {
372 spin_unlock_irqrestore(&rxq->lock, flags);
373 pci_unmap_page(il->pci_dev, page_dma,
374 PAGE_SIZE << il->hw_params.rx_page_order,
375 PCI_DMA_FROMDEVICE);
376 __free_pages(page, il->hw_params.rx_page_order);
377 return;
378 }
379
380 element = rxq->rx_used.next;
381 rxb = list_entry(element, struct il_rx_buf, list);
382 list_del(element);
383
384 BUG_ON(rxb->page);
385
386 rxb->page = page;
387 rxb->page_dma = page_dma;
388 list_add_tail(&rxb->list, &rxq->rx_free);
389 rxq->free_count++;
390 il->alloc_rxb_page++;
391
392 spin_unlock_irqrestore(&rxq->lock, flags);
393 }
394 }
395
396 void
397 il4965_rx_replenish(struct il_priv *il)
398 {
399 unsigned long flags;
400
401 il4965_rx_allocate(il, GFP_KERNEL);
402
403 spin_lock_irqsave(&il->lock, flags);
404 il4965_rx_queue_restock(il);
405 spin_unlock_irqrestore(&il->lock, flags);
406 }
407
408 void
409 il4965_rx_replenish_now(struct il_priv *il)
410 {
411 il4965_rx_allocate(il, GFP_ATOMIC);
412
413 il4965_rx_queue_restock(il);
414 }
415
416 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
417 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
418 * This free routine walks the list of POOL entries and if SKB is set to
419 * non NULL it is unmapped and freed
420 */
421 void
422 il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
423 {
424 int i;
425 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
426 if (rxq->pool[i].page != NULL) {
427 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
428 PAGE_SIZE << il->hw_params.rx_page_order,
429 PCI_DMA_FROMDEVICE);
430 __il_free_pages(il, rxq->pool[i].page);
431 rxq->pool[i].page = NULL;
432 }
433 }
434
435 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
436 rxq->bd_dma);
437 dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
438 rxq->rb_stts, rxq->rb_stts_dma);
439 rxq->bd = NULL;
440 rxq->rb_stts = NULL;
441 }
442
443 int
444 il4965_rxq_stop(struct il_priv *il)
445 {
446 int ret;
447
448 _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
449 ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG,
450 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
451 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
452 1000);
453 if (ret < 0)
454 IL_ERR("Can't stop Rx DMA.\n");
455
456 return 0;
457 }
458
459 int
460 il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band)
461 {
462 int idx = 0;
463 int band_offset = 0;
464
465 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
466 if (rate_n_flags & RATE_MCS_HT_MSK) {
467 idx = (rate_n_flags & 0xff);
468 return idx;
469 /* Legacy rate format, search for match in table */
470 } else {
471 if (band == NL80211_BAND_5GHZ)
472 band_offset = IL_FIRST_OFDM_RATE;
473 for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++)
474 if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
475 return idx - band_offset;
476 }
477
478 return -1;
479 }
480
481 static int
482 il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp)
483 {
484 /* data from PHY/DSP regarding signal strength, etc.,
485 * contents are always there, not configurable by host. */
486 struct il4965_rx_non_cfg_phy *ncphy =
487 (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
488 u32 agc =
489 (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >>
490 IL49_AGC_DB_POS;
491
492 u32 valid_antennae =
493 (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK)
494 >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
495 u8 max_rssi = 0;
496 u32 i;
497
498 /* Find max rssi among 3 possible receivers.
499 * These values are measured by the digital signal processor (DSP).
500 * They should stay fairly constant even as the signal strength varies,
501 * if the radio's automatic gain control (AGC) is working right.
502 * AGC value (see below) will provide the "interesting" info. */
503 for (i = 0; i < 3; i++)
504 if (valid_antennae & (1 << i))
505 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
506
507 D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
508 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
509 max_rssi, agc);
510
511 /* dBm = max_rssi dB - agc dB - constant.
512 * Higher AGC (higher radio gain) means lower signal. */
513 return max_rssi - agc - IL4965_RSSI_OFFSET;
514 }
515
516 static u32
517 il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in)
518 {
519 u32 decrypt_out = 0;
520
521 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
522 RX_RES_STATUS_STATION_FOUND)
523 decrypt_out |=
524 (RX_RES_STATUS_STATION_FOUND |
525 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
526
527 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
528
529 /* packet was not encrypted */
530 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
531 RX_RES_STATUS_SEC_TYPE_NONE)
532 return decrypt_out;
533
534 /* packet was encrypted with unknown alg */
535 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
536 RX_RES_STATUS_SEC_TYPE_ERR)
537 return decrypt_out;
538
539 /* decryption was not done in HW */
540 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
541 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
542 return decrypt_out;
543
544 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
545
546 case RX_RES_STATUS_SEC_TYPE_CCMP:
547 /* alg is CCM: check MIC only */
548 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
549 /* Bad MIC */
550 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
551 else
552 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
553
554 break;
555
556 case RX_RES_STATUS_SEC_TYPE_TKIP:
557 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
558 /* Bad TTAK */
559 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
560 break;
561 }
562 /* fall through if TTAK OK */
563 default:
564 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
565 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
566 else
567 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
568 break;
569 }
570
571 D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out);
572
573 return decrypt_out;
574 }
575
576 #define SMALL_PACKET_SIZE 256
577
578 static void
579 il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr,
580 u32 len, u32 ampdu_status, struct il_rx_buf *rxb,
581 struct ieee80211_rx_status *stats)
582 {
583 struct sk_buff *skb;
584 __le16 fc = hdr->frame_control;
585
586 /* We only process data packets if the interface is open */
587 if (unlikely(!il->is_open)) {
588 D_DROP("Dropping packet while interface is not open.\n");
589 return;
590 }
591
592 if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) {
593 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
594 D_INFO("Woke queues - frame received on passive channel\n");
595 }
596
597 /* In case of HW accelerated crypto and bad decryption, drop */
598 if (!il->cfg->mod_params->sw_crypto &&
599 il_set_decrypted_flag(il, hdr, ampdu_status, stats))
600 return;
601
602 skb = dev_alloc_skb(SMALL_PACKET_SIZE);
603 if (!skb) {
604 IL_ERR("dev_alloc_skb failed\n");
605 return;
606 }
607
608 if (len <= SMALL_PACKET_SIZE) {
609 skb_put_data(skb, hdr, len);
610 } else {
611 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb),
612 len, PAGE_SIZE << il->hw_params.rx_page_order);
613 il->alloc_rxb_page--;
614 rxb->page = NULL;
615 }
616
617 il_update_stats(il, false, fc, len);
618 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
619
620 ieee80211_rx(il->hw, skb);
621 }
622
623 /* Called for N_RX (legacy ABG frames), or
624 * N_RX_MPDU (HT high-throughput N frames). */
625 static void
626 il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb)
627 {
628 struct ieee80211_hdr *header;
629 struct ieee80211_rx_status rx_status = {};
630 struct il_rx_pkt *pkt = rxb_addr(rxb);
631 struct il_rx_phy_res *phy_res;
632 __le32 rx_pkt_status;
633 struct il_rx_mpdu_res_start *amsdu;
634 u32 len;
635 u32 ampdu_status;
636 u32 rate_n_flags;
637
638 /**
639 * N_RX and N_RX_MPDU are handled differently.
640 * N_RX: physical layer info is in this buffer
641 * N_RX_MPDU: physical layer info was sent in separate
642 * command and cached in il->last_phy_res
643 *
644 * Here we set up local variables depending on which command is
645 * received.
646 */
647 if (pkt->hdr.cmd == N_RX) {
648 phy_res = (struct il_rx_phy_res *)pkt->u.raw;
649 header =
650 (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) +
651 phy_res->cfg_phy_cnt);
652
653 len = le16_to_cpu(phy_res->byte_count);
654 rx_pkt_status =
655 *(__le32 *) (pkt->u.raw + sizeof(*phy_res) +
656 phy_res->cfg_phy_cnt + len);
657 ampdu_status = le32_to_cpu(rx_pkt_status);
658 } else {
659 if (!il->_4965.last_phy_res_valid) {
660 IL_ERR("MPDU frame without cached PHY data\n");
661 return;
662 }
663 phy_res = &il->_4965.last_phy_res;
664 amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw;
665 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
666 len = le16_to_cpu(amsdu->byte_count);
667 rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len);
668 ampdu_status =
669 il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status));
670 }
671
672 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
673 D_DROP("dsp size out of range [0,20]: %d\n",
674 phy_res->cfg_phy_cnt);
675 return;
676 }
677
678 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
679 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
680 D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status));
681 return;
682 }
683
684 /* This will be used in several places later */
685 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
686
687 /* rx_status carries information about the packet to mac80211 */
688 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
689 rx_status.band =
690 (phy_res->
691 phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ :
692 NL80211_BAND_5GHZ;
693 rx_status.freq =
694 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
695 rx_status.band);
696 rx_status.rate_idx =
697 il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
698 rx_status.flag = 0;
699
700 /* TSF isn't reliable. In order to allow smooth user experience,
701 * this W/A doesn't propagate it to the mac80211 */
702 /*rx_status.flag |= RX_FLAG_MACTIME_START; */
703
704 il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
705
706 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
707 rx_status.signal = il4965_calc_rssi(il, phy_res);
708
709 D_STATS("Rssi %d, TSF %llu\n", rx_status.signal,
710 (unsigned long long)rx_status.mactime);
711
712 /*
713 * "antenna number"
714 *
715 * It seems that the antenna field in the phy flags value
716 * is actually a bit field. This is undefined by radiotap,
717 * it wants an actual antenna number but I always get "7"
718 * for most legacy frames I receive indicating that the
719 * same frame was received on all three RX chains.
720 *
721 * I think this field should be removed in favor of a
722 * new 802.11n radiotap field "RX chains" that is defined
723 * as a bitmask.
724 */
725 rx_status.antenna =
726 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >>
727 RX_RES_PHY_FLAGS_ANTENNA_POS;
728
729 /* set the preamble flag if appropriate */
730 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
731 rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE;
732
733 /* Set up the HT phy flags */
734 if (rate_n_flags & RATE_MCS_HT_MSK)
735 rx_status.encoding = RX_ENC_HT;
736 if (rate_n_flags & RATE_MCS_HT40_MSK)
737 rx_status.bw = RATE_INFO_BW_40;
738 else
739 rx_status.bw = RATE_INFO_BW_20;
740 if (rate_n_flags & RATE_MCS_SGI_MSK)
741 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
742
743 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
744 /* We know which subframes of an A-MPDU belong
745 * together since we get a single PHY response
746 * from the firmware for all of them.
747 */
748
749 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
750 rx_status.ampdu_reference = il->_4965.ampdu_ref;
751 }
752
753 il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb,
754 &rx_status);
755 }
756
757 /* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY).
758 * This will be used later in il_hdl_rx() for N_RX_MPDU. */
759 static void
760 il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb)
761 {
762 struct il_rx_pkt *pkt = rxb_addr(rxb);
763 il->_4965.last_phy_res_valid = true;
764 il->_4965.ampdu_ref++;
765 memcpy(&il->_4965.last_phy_res, pkt->u.raw,
766 sizeof(struct il_rx_phy_res));
767 }
768
769 static int
770 il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif,
771 enum nl80211_band band, u8 is_active,
772 u8 n_probes, struct il_scan_channel *scan_ch)
773 {
774 struct ieee80211_channel *chan;
775 const struct ieee80211_supported_band *sband;
776 const struct il_channel_info *ch_info;
777 u16 passive_dwell = 0;
778 u16 active_dwell = 0;
779 int added, i;
780 u16 channel;
781
782 sband = il_get_hw_mode(il, band);
783 if (!sband)
784 return 0;
785
786 active_dwell = il_get_active_dwell_time(il, band, n_probes);
787 passive_dwell = il_get_passive_dwell_time(il, band, vif);
788
789 if (passive_dwell <= active_dwell)
790 passive_dwell = active_dwell + 1;
791
792 for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
793 chan = il->scan_request->channels[i];
794
795 if (chan->band != band)
796 continue;
797
798 channel = chan->hw_value;
799 scan_ch->channel = cpu_to_le16(channel);
800
801 ch_info = il_get_channel_info(il, band, channel);
802 if (!il_is_channel_valid(ch_info)) {
803 D_SCAN("Channel %d is INVALID for this band.\n",
804 channel);
805 continue;
806 }
807
808 if (!is_active || il_is_channel_passive(ch_info) ||
809 (chan->flags & IEEE80211_CHAN_NO_IR))
810 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
811 else
812 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
813
814 if (n_probes)
815 scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes);
816
817 scan_ch->active_dwell = cpu_to_le16(active_dwell);
818 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
819
820 /* Set txpower levels to defaults */
821 scan_ch->dsp_atten = 110;
822
823 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
824 * power level:
825 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
826 */
827 if (band == NL80211_BAND_5GHZ)
828 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
829 else
830 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
831
832 D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel,
833 le32_to_cpu(scan_ch->type),
834 (scan_ch->
835 type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE",
836 (scan_ch->
837 type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell :
838 passive_dwell);
839
840 scan_ch++;
841 added++;
842 }
843
844 D_SCAN("total channels to scan %d\n", added);
845 return added;
846 }
847
848 static void
849 il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid)
850 {
851 int i;
852 u8 ind = *ant;
853
854 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
855 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
856 if (valid & BIT(ind)) {
857 *ant = ind;
858 return;
859 }
860 }
861 }
862
863 int
864 il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
865 {
866 struct il_host_cmd cmd = {
867 .id = C_SCAN,
868 .len = sizeof(struct il_scan_cmd),
869 .flags = CMD_SIZE_HUGE,
870 };
871 struct il_scan_cmd *scan;
872 u32 rate_flags = 0;
873 u16 cmd_len;
874 u16 rx_chain = 0;
875 enum nl80211_band band;
876 u8 n_probes = 0;
877 u8 rx_ant = il->hw_params.valid_rx_ant;
878 u8 rate;
879 bool is_active = false;
880 int chan_mod;
881 u8 active_chains;
882 u8 scan_tx_antennas = il->hw_params.valid_tx_ant;
883 int ret;
884
885 lockdep_assert_held(&il->mutex);
886
887 if (!il->scan_cmd) {
888 il->scan_cmd =
889 kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE,
890 GFP_KERNEL);
891 if (!il->scan_cmd) {
892 D_SCAN("fail to allocate memory for scan\n");
893 return -ENOMEM;
894 }
895 }
896 scan = il->scan_cmd;
897 memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE);
898
899 scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
900 scan->quiet_time = IL_ACTIVE_QUIET_TIME;
901
902 if (il_is_any_associated(il)) {
903 u16 interval;
904 u32 extra;
905 u32 suspend_time = 100;
906 u32 scan_suspend_time = 100;
907
908 D_INFO("Scanning while associated...\n");
909 interval = vif->bss_conf.beacon_int;
910
911 scan->suspend_time = 0;
912 scan->max_out_time = cpu_to_le32(200 * 1024);
913 if (!interval)
914 interval = suspend_time;
915
916 extra = (suspend_time / interval) << 22;
917 scan_suspend_time =
918 (extra | ((suspend_time % interval) * 1024));
919 scan->suspend_time = cpu_to_le32(scan_suspend_time);
920 D_SCAN("suspend_time 0x%X beacon interval %d\n",
921 scan_suspend_time, interval);
922 }
923
924 if (il->scan_request->n_ssids) {
925 int i, p = 0;
926 D_SCAN("Kicking off active scan\n");
927 for (i = 0; i < il->scan_request->n_ssids; i++) {
928 /* always does wildcard anyway */
929 if (!il->scan_request->ssids[i].ssid_len)
930 continue;
931 scan->direct_scan[p].id = WLAN_EID_SSID;
932 scan->direct_scan[p].len =
933 il->scan_request->ssids[i].ssid_len;
934 memcpy(scan->direct_scan[p].ssid,
935 il->scan_request->ssids[i].ssid,
936 il->scan_request->ssids[i].ssid_len);
937 n_probes++;
938 p++;
939 }
940 is_active = true;
941 } else
942 D_SCAN("Start passive scan.\n");
943
944 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
945 scan->tx_cmd.sta_id = il->hw_params.bcast_id;
946 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
947
948 switch (il->scan_band) {
949 case NL80211_BAND_2GHZ:
950 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
951 chan_mod =
952 le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >>
953 RXON_FLG_CHANNEL_MODE_POS;
954 if (chan_mod == CHANNEL_MODE_PURE_40) {
955 rate = RATE_6M_PLCP;
956 } else {
957 rate = RATE_1M_PLCP;
958 rate_flags = RATE_MCS_CCK_MSK;
959 }
960 break;
961 case NL80211_BAND_5GHZ:
962 rate = RATE_6M_PLCP;
963 break;
964 default:
965 IL_WARN("Invalid scan band\n");
966 return -EIO;
967 }
968
969 /*
970 * If active scanning is requested but a certain channel is
971 * marked passive, we can do active scanning if we detect
972 * transmissions.
973 *
974 * There is an issue with some firmware versions that triggers
975 * a sysassert on a "good CRC threshold" of zero (== disabled),
976 * on a radar channel even though this means that we should NOT
977 * send probes.
978 *
979 * The "good CRC threshold" is the number of frames that we
980 * need to receive during our dwell time on a channel before
981 * sending out probes -- setting this to a huge value will
982 * mean we never reach it, but at the same time work around
983 * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER
984 * here instead of IL_GOOD_CRC_TH_DISABLED.
985 */
986 scan->good_CRC_th =
987 is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
988
989 band = il->scan_band;
990
991 if (il->cfg->scan_rx_antennas[band])
992 rx_ant = il->cfg->scan_rx_antennas[band];
993
994 il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas);
995 rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS;
996 scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags);
997
998 /* In power save mode use one chain, otherwise use all chains */
999 if (test_bit(S_POWER_PMI, &il->status)) {
1000 /* rx_ant has been set to all valid chains previously */
1001 active_chains =
1002 rx_ant & ((u8) (il->chain_noise_data.active_chains));
1003 if (!active_chains)
1004 active_chains = rx_ant;
1005
1006 D_SCAN("chain_noise_data.active_chains: %u\n",
1007 il->chain_noise_data.active_chains);
1008
1009 rx_ant = il4965_first_antenna(active_chains);
1010 }
1011
1012 /* MIMO is not used here, but value is required */
1013 rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
1014 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1015 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
1016 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1017 scan->rx_chain = cpu_to_le16(rx_chain);
1018
1019 cmd_len =
1020 il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
1021 vif->addr, il->scan_request->ie,
1022 il->scan_request->ie_len,
1023 IL_MAX_SCAN_SIZE - sizeof(*scan));
1024 scan->tx_cmd.len = cpu_to_le16(cmd_len);
1025
1026 scan->filter_flags |=
1027 (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK);
1028
1029 scan->channel_count =
1030 il4965_get_channels_for_scan(il, vif, band, is_active, n_probes,
1031 (void *)&scan->data[cmd_len]);
1032 if (scan->channel_count == 0) {
1033 D_SCAN("channel count %d\n", scan->channel_count);
1034 return -EIO;
1035 }
1036
1037 cmd.len +=
1038 le16_to_cpu(scan->tx_cmd.len) +
1039 scan->channel_count * sizeof(struct il_scan_channel);
1040 cmd.data = scan;
1041 scan->len = cpu_to_le16(cmd.len);
1042
1043 set_bit(S_SCAN_HW, &il->status);
1044
1045 ret = il_send_cmd_sync(il, &cmd);
1046 if (ret)
1047 clear_bit(S_SCAN_HW, &il->status);
1048
1049 return ret;
1050 }
1051
1052 int
1053 il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif,
1054 bool add)
1055 {
1056 struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
1057
1058 if (add)
1059 return il4965_add_bssid_station(il, vif->bss_conf.bssid,
1060 &vif_priv->ibss_bssid_sta_id);
1061 return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
1062 vif->bss_conf.bssid);
1063 }
1064
1065 void
1066 il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed)
1067 {
1068 lockdep_assert_held(&il->sta_lock);
1069
1070 if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1071 il->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1072 else {
1073 D_TX("free more than tfds_in_queue (%u:%d)\n",
1074 il->stations[sta_id].tid[tid].tfds_in_queue, freed);
1075 il->stations[sta_id].tid[tid].tfds_in_queue = 0;
1076 }
1077 }
1078
1079 #define IL_TX_QUEUE_MSK 0xfffff
1080
1081 static bool
1082 il4965_is_single_rx_stream(struct il_priv *il)
1083 {
1084 return il->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1085 il->current_ht_config.single_chain_sufficient;
1086 }
1087
1088 #define IL_NUM_RX_CHAINS_MULTIPLE 3
1089 #define IL_NUM_RX_CHAINS_SINGLE 2
1090 #define IL_NUM_IDLE_CHAINS_DUAL 2
1091 #define IL_NUM_IDLE_CHAINS_SINGLE 1
1092
1093 /*
1094 * Determine how many receiver/antenna chains to use.
1095 *
1096 * More provides better reception via diversity. Fewer saves power
1097 * at the expense of throughput, but only when not in powersave to
1098 * start with.
1099 *
1100 * MIMO (dual stream) requires at least 2, but works better with 3.
1101 * This does not determine *which* chains to use, just how many.
1102 */
1103 static int
1104 il4965_get_active_rx_chain_count(struct il_priv *il)
1105 {
1106 /* # of Rx chains to use when expecting MIMO. */
1107 if (il4965_is_single_rx_stream(il))
1108 return IL_NUM_RX_CHAINS_SINGLE;
1109 else
1110 return IL_NUM_RX_CHAINS_MULTIPLE;
1111 }
1112
1113 /*
1114 * When we are in power saving mode, unless device support spatial
1115 * multiplexing power save, use the active count for rx chain count.
1116 */
1117 static int
1118 il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt)
1119 {
1120 /* # Rx chains when idling, depending on SMPS mode */
1121 switch (il->current_ht_config.smps) {
1122 case IEEE80211_SMPS_STATIC:
1123 case IEEE80211_SMPS_DYNAMIC:
1124 return IL_NUM_IDLE_CHAINS_SINGLE;
1125 case IEEE80211_SMPS_OFF:
1126 return active_cnt;
1127 default:
1128 WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps);
1129 return active_cnt;
1130 }
1131 }
1132
1133 /* up to 4 chains */
1134 static u8
1135 il4965_count_chain_bitmap(u32 chain_bitmap)
1136 {
1137 u8 res;
1138 res = (chain_bitmap & BIT(0)) >> 0;
1139 res += (chain_bitmap & BIT(1)) >> 1;
1140 res += (chain_bitmap & BIT(2)) >> 2;
1141 res += (chain_bitmap & BIT(3)) >> 3;
1142 return res;
1143 }
1144
1145 /**
1146 * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1147 *
1148 * Selects how many and which Rx receivers/antennas/chains to use.
1149 * This should not be used for scan command ... it puts data in wrong place.
1150 */
1151 void
1152 il4965_set_rxon_chain(struct il_priv *il)
1153 {
1154 bool is_single = il4965_is_single_rx_stream(il);
1155 bool is_cam = !test_bit(S_POWER_PMI, &il->status);
1156 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1157 u32 active_chains;
1158 u16 rx_chain;
1159
1160 /* Tell uCode which antennas are actually connected.
1161 * Before first association, we assume all antennas are connected.
1162 * Just after first association, il4965_chain_noise_calibration()
1163 * checks which antennas actually *are* connected. */
1164 if (il->chain_noise_data.active_chains)
1165 active_chains = il->chain_noise_data.active_chains;
1166 else
1167 active_chains = il->hw_params.valid_rx_ant;
1168
1169 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1170
1171 /* How many receivers should we use? */
1172 active_rx_cnt = il4965_get_active_rx_chain_count(il);
1173 idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt);
1174
1175 /* correct rx chain count according hw settings
1176 * and chain noise calibration
1177 */
1178 valid_rx_cnt = il4965_count_chain_bitmap(active_chains);
1179 if (valid_rx_cnt < active_rx_cnt)
1180 active_rx_cnt = valid_rx_cnt;
1181
1182 if (valid_rx_cnt < idle_rx_cnt)
1183 idle_rx_cnt = valid_rx_cnt;
1184
1185 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1186 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
1187
1188 il->staging.rx_chain = cpu_to_le16(rx_chain);
1189
1190 if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam)
1191 il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1192 else
1193 il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1194
1195 D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain,
1196 active_rx_cnt, idle_rx_cnt);
1197
1198 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1199 active_rx_cnt < idle_rx_cnt);
1200 }
1201
1202 static const char *
1203 il4965_get_fh_string(int cmd)
1204 {
1205 switch (cmd) {
1206 IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG);
1207 IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG);
1208 IL_CMD(FH49_RSCSR_CHNL0_WPTR);
1209 IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG);
1210 IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG);
1211 IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG);
1212 IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1213 IL_CMD(FH49_TSSR_TX_STATUS_REG);
1214 IL_CMD(FH49_TSSR_TX_ERROR_REG);
1215 default:
1216 return "UNKNOWN";
1217 }
1218 }
1219
1220 int
1221 il4965_dump_fh(struct il_priv *il, char **buf, bool display)
1222 {
1223 int i;
1224 #ifdef CONFIG_IWLEGACY_DEBUG
1225 int pos = 0;
1226 size_t bufsz = 0;
1227 #endif
1228 static const u32 fh_tbl[] = {
1229 FH49_RSCSR_CHNL0_STTS_WPTR_REG,
1230 FH49_RSCSR_CHNL0_RBDCB_BASE_REG,
1231 FH49_RSCSR_CHNL0_WPTR,
1232 FH49_MEM_RCSR_CHNL0_CONFIG_REG,
1233 FH49_MEM_RSSR_SHARED_CTRL_REG,
1234 FH49_MEM_RSSR_RX_STATUS_REG,
1235 FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1236 FH49_TSSR_TX_STATUS_REG,
1237 FH49_TSSR_TX_ERROR_REG
1238 };
1239 #ifdef CONFIG_IWLEGACY_DEBUG
1240 if (display) {
1241 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1242 *buf = kmalloc(bufsz, GFP_KERNEL);
1243 if (!*buf)
1244 return -ENOMEM;
1245 pos +=
1246 scnprintf(*buf + pos, bufsz - pos, "FH register values:\n");
1247 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1248 pos +=
1249 scnprintf(*buf + pos, bufsz - pos,
1250 " %34s: 0X%08x\n",
1251 il4965_get_fh_string(fh_tbl[i]),
1252 il_rd(il, fh_tbl[i]));
1253 }
1254 return pos;
1255 }
1256 #endif
1257 IL_ERR("FH register values:\n");
1258 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1259 IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]),
1260 il_rd(il, fh_tbl[i]));
1261 }
1262 return 0;
1263 }
1264
1265 static void
1266 il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb)
1267 {
1268 struct il_rx_pkt *pkt = rxb_addr(rxb);
1269 struct il_missed_beacon_notif *missed_beacon;
1270
1271 missed_beacon = &pkt->u.missed_beacon;
1272 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
1273 il->missed_beacon_threshold) {
1274 D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
1275 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
1276 le32_to_cpu(missed_beacon->total_missed_becons),
1277 le32_to_cpu(missed_beacon->num_recvd_beacons),
1278 le32_to_cpu(missed_beacon->num_expected_beacons));
1279 if (!test_bit(S_SCANNING, &il->status))
1280 il4965_init_sensitivity(il);
1281 }
1282 }
1283
1284 /* Calculate noise level, based on measurements during network silence just
1285 * before arriving beacon. This measurement can be done only if we know
1286 * exactly when to expect beacons, therefore only when we're associated. */
1287 static void
1288 il4965_rx_calc_noise(struct il_priv *il)
1289 {
1290 struct stats_rx_non_phy *rx_info;
1291 int num_active_rx = 0;
1292 int total_silence = 0;
1293 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
1294 int last_rx_noise;
1295
1296 rx_info = &(il->_4965.stats.rx.general);
1297 bcn_silence_a =
1298 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
1299 bcn_silence_b =
1300 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
1301 bcn_silence_c =
1302 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
1303
1304 if (bcn_silence_a) {
1305 total_silence += bcn_silence_a;
1306 num_active_rx++;
1307 }
1308 if (bcn_silence_b) {
1309 total_silence += bcn_silence_b;
1310 num_active_rx++;
1311 }
1312 if (bcn_silence_c) {
1313 total_silence += bcn_silence_c;
1314 num_active_rx++;
1315 }
1316
1317 /* Average among active antennas */
1318 if (num_active_rx)
1319 last_rx_noise = (total_silence / num_active_rx) - 107;
1320 else
1321 last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE;
1322
1323 D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a,
1324 bcn_silence_b, bcn_silence_c, last_rx_noise);
1325 }
1326
1327 #ifdef CONFIG_IWLEGACY_DEBUGFS
1328 /*
1329 * based on the assumption of all stats counter are in DWORD
1330 * FIXME: This function is for debugging, do not deal with
1331 * the case of counters roll-over.
1332 */
1333 static void
1334 il4965_accumulative_stats(struct il_priv *il, __le32 * stats)
1335 {
1336 int i, size;
1337 __le32 *prev_stats;
1338 u32 *accum_stats;
1339 u32 *delta, *max_delta;
1340 struct stats_general_common *general, *accum_general;
1341 struct stats_tx *tx, *accum_tx;
1342
1343 prev_stats = (__le32 *) &il->_4965.stats;
1344 accum_stats = (u32 *) &il->_4965.accum_stats;
1345 size = sizeof(struct il_notif_stats);
1346 general = &il->_4965.stats.general.common;
1347 accum_general = &il->_4965.accum_stats.general.common;
1348 tx = &il->_4965.stats.tx;
1349 accum_tx = &il->_4965.accum_stats.tx;
1350 delta = (u32 *) &il->_4965.delta_stats;
1351 max_delta = (u32 *) &il->_4965.max_delta;
1352
1353 for (i = sizeof(__le32); i < size;
1354 i +=
1355 sizeof(__le32), stats++, prev_stats++, delta++, max_delta++,
1356 accum_stats++) {
1357 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
1358 *delta =
1359 (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats));
1360 *accum_stats += *delta;
1361 if (*delta > *max_delta)
1362 *max_delta = *delta;
1363 }
1364 }
1365
1366 /* reset accumulative stats for "no-counter" type stats */
1367 accum_general->temperature = general->temperature;
1368 accum_general->ttl_timestamp = general->ttl_timestamp;
1369 }
1370 #endif
1371
1372 static void
1373 il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb)
1374 {
1375 const int recalib_seconds = 60;
1376 bool change;
1377 struct il_rx_pkt *pkt = rxb_addr(rxb);
1378
1379 D_RX("Statistics notification received (%d vs %d).\n",
1380 (int)sizeof(struct il_notif_stats),
1381 le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK);
1382
1383 change =
1384 ((il->_4965.stats.general.common.temperature !=
1385 pkt->u.stats.general.common.temperature) ||
1386 ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) !=
1387 (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK)));
1388 #ifdef CONFIG_IWLEGACY_DEBUGFS
1389 il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats);
1390 #endif
1391
1392 /* TODO: reading some of stats is unneeded */
1393 memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats));
1394
1395 set_bit(S_STATS, &il->status);
1396
1397 /*
1398 * Reschedule the stats timer to occur in recalib_seconds to ensure
1399 * we get a thermal update even if the uCode doesn't give us one
1400 */
1401 mod_timer(&il->stats_periodic,
1402 jiffies + msecs_to_jiffies(recalib_seconds * 1000));
1403
1404 if (unlikely(!test_bit(S_SCANNING, &il->status)) &&
1405 (pkt->hdr.cmd == N_STATS)) {
1406 il4965_rx_calc_noise(il);
1407 queue_work(il->workqueue, &il->run_time_calib_work);
1408 }
1409
1410 if (change)
1411 il4965_temperature_calib(il);
1412 }
1413
1414 static void
1415 il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb)
1416 {
1417 struct il_rx_pkt *pkt = rxb_addr(rxb);
1418
1419 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) {
1420 #ifdef CONFIG_IWLEGACY_DEBUGFS
1421 memset(&il->_4965.accum_stats, 0,
1422 sizeof(struct il_notif_stats));
1423 memset(&il->_4965.delta_stats, 0,
1424 sizeof(struct il_notif_stats));
1425 memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats));
1426 #endif
1427 D_RX("Statistics have been cleared\n");
1428 }
1429 il4965_hdl_stats(il, rxb);
1430 }
1431
1432
1433 /*
1434 * mac80211 queues, ACs, hardware queues, FIFOs.
1435 *
1436 * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
1437 *
1438 * Mac80211 uses the following numbers, which we get as from it
1439 * by way of skb_get_queue_mapping(skb):
1440 *
1441 * VO 0
1442 * VI 1
1443 * BE 2
1444 * BK 3
1445 *
1446 *
1447 * Regular (not A-MPDU) frames are put into hardware queues corresponding
1448 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
1449 * own queue per aggregation session (RA/TID combination), such queues are
1450 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
1451 * order to map frames to the right queue, we also need an AC->hw queue
1452 * mapping. This is implemented here.
1453 *
1454 * Due to the way hw queues are set up (by the hw specific modules like
1455 * 4965.c), the AC->hw queue mapping is the identity
1456 * mapping.
1457 */
1458
1459 static const u8 tid_to_ac[] = {
1460 IEEE80211_AC_BE,
1461 IEEE80211_AC_BK,
1462 IEEE80211_AC_BK,
1463 IEEE80211_AC_BE,
1464 IEEE80211_AC_VI,
1465 IEEE80211_AC_VI,
1466 IEEE80211_AC_VO,
1467 IEEE80211_AC_VO
1468 };
1469
1470 static inline int
1471 il4965_get_ac_from_tid(u16 tid)
1472 {
1473 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1474 return tid_to_ac[tid];
1475
1476 /* no support for TIDs 8-15 yet */
1477 return -EINVAL;
1478 }
1479
1480 static inline int
1481 il4965_get_fifo_from_tid(u16 tid)
1482 {
1483 static const u8 ac_to_fifo[] = {
1484 IL_TX_FIFO_VO,
1485 IL_TX_FIFO_VI,
1486 IL_TX_FIFO_BE,
1487 IL_TX_FIFO_BK,
1488 };
1489
1490 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1491 return ac_to_fifo[tid_to_ac[tid]];
1492
1493 /* no support for TIDs 8-15 yet */
1494 return -EINVAL;
1495 }
1496
1497 /*
1498 * handle build C_TX command notification.
1499 */
1500 static void
1501 il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb,
1502 struct il_tx_cmd *tx_cmd,
1503 struct ieee80211_tx_info *info,
1504 struct ieee80211_hdr *hdr, u8 std_id)
1505 {
1506 __le16 fc = hdr->frame_control;
1507 __le32 tx_flags = tx_cmd->tx_flags;
1508
1509 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1510 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
1511 tx_flags |= TX_CMD_FLG_ACK_MSK;
1512 if (ieee80211_is_mgmt(fc))
1513 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1514 if (ieee80211_is_probe_resp(fc) &&
1515 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1516 tx_flags |= TX_CMD_FLG_TSF_MSK;
1517 } else {
1518 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1519 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1520 }
1521
1522 if (ieee80211_is_back_req(fc))
1523 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1524
1525 tx_cmd->sta_id = std_id;
1526 if (ieee80211_has_morefrags(fc))
1527 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1528
1529 if (ieee80211_is_data_qos(fc)) {
1530 u8 *qc = ieee80211_get_qos_ctl(hdr);
1531 tx_cmd->tid_tspec = qc[0] & 0xf;
1532 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1533 } else {
1534 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1535 }
1536
1537 il_tx_cmd_protection(il, info, fc, &tx_flags);
1538
1539 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1540 if (ieee80211_is_mgmt(fc)) {
1541 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
1542 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
1543 else
1544 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
1545 } else {
1546 tx_cmd->timeout.pm_frame_timeout = 0;
1547 }
1548
1549 tx_cmd->driver_txop = 0;
1550 tx_cmd->tx_flags = tx_flags;
1551 tx_cmd->next_frame_len = 0;
1552 }
1553
1554 static void
1555 il4965_tx_cmd_build_rate(struct il_priv *il,
1556 struct il_tx_cmd *tx_cmd,
1557 struct ieee80211_tx_info *info,
1558 struct ieee80211_sta *sta,
1559 __le16 fc)
1560 {
1561 const u8 rts_retry_limit = 60;
1562 u32 rate_flags;
1563 int rate_idx;
1564 u8 data_retry_limit;
1565 u8 rate_plcp;
1566
1567 /* Set retry limit on DATA packets and Probe Responses */
1568 if (ieee80211_is_probe_resp(fc))
1569 data_retry_limit = 3;
1570 else
1571 data_retry_limit = IL4965_DEFAULT_TX_RETRY;
1572 tx_cmd->data_retry_limit = data_retry_limit;
1573 /* Set retry limit on RTS packets */
1574 tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit);
1575
1576 /* DATA packets will use the uCode station table for rate/antenna
1577 * selection */
1578 if (ieee80211_is_data(fc)) {
1579 tx_cmd->initial_rate_idx = 0;
1580 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
1581 return;
1582 }
1583
1584 /**
1585 * If the current TX rate stored in mac80211 has the MCS bit set, it's
1586 * not really a TX rate. Thus, we use the lowest supported rate for
1587 * this band. Also use the lowest supported rate if the stored rate
1588 * idx is invalid.
1589 */
1590 rate_idx = info->control.rates[0].idx;
1591 if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0
1592 || rate_idx > RATE_COUNT_LEGACY)
1593 rate_idx = rate_lowest_index(&il->bands[info->band], sta);
1594 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
1595 if (info->band == NL80211_BAND_5GHZ)
1596 rate_idx += IL_FIRST_OFDM_RATE;
1597 /* Get PLCP rate for tx_cmd->rate_n_flags */
1598 rate_plcp = il_rates[rate_idx].plcp;
1599 /* Zero out flags for this packet */
1600 rate_flags = 0;
1601
1602 /* Set CCK flag as needed */
1603 if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE)
1604 rate_flags |= RATE_MCS_CCK_MSK;
1605
1606 /* Set up antennas */
1607 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
1608 rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
1609
1610 /* Set the rate in the TX cmd */
1611 tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags);
1612 }
1613
1614 static void
1615 il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
1616 struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag,
1617 int sta_id)
1618 {
1619 struct ieee80211_key_conf *keyconf = info->control.hw_key;
1620
1621 switch (keyconf->cipher) {
1622 case WLAN_CIPHER_SUITE_CCMP:
1623 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
1624 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
1625 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1626 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1627 D_TX("tx_cmd with AES hwcrypto\n");
1628 break;
1629
1630 case WLAN_CIPHER_SUITE_TKIP:
1631 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
1632 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
1633 D_TX("tx_cmd with tkip hwcrypto\n");
1634 break;
1635
1636 case WLAN_CIPHER_SUITE_WEP104:
1637 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
1638 /* fall through */
1639 case WLAN_CIPHER_SUITE_WEP40:
1640 tx_cmd->sec_ctl |=
1641 (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) <<
1642 TX_CMD_SEC_SHIFT);
1643
1644 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
1645
1646 D_TX("Configuring packet for WEP encryption " "with key %d\n",
1647 keyconf->keyidx);
1648 break;
1649
1650 default:
1651 IL_ERR("Unknown encode cipher %x\n", keyconf->cipher);
1652 break;
1653 }
1654 }
1655
1656 /*
1657 * start C_TX command process
1658 */
1659 int
1660 il4965_tx_skb(struct il_priv *il,
1661 struct ieee80211_sta *sta,
1662 struct sk_buff *skb)
1663 {
1664 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1665 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1666 struct il_station_priv *sta_priv = NULL;
1667 struct il_tx_queue *txq;
1668 struct il_queue *q;
1669 struct il_device_cmd *out_cmd;
1670 struct il_cmd_meta *out_meta;
1671 struct il_tx_cmd *tx_cmd;
1672 int txq_id;
1673 dma_addr_t phys_addr;
1674 dma_addr_t txcmd_phys;
1675 dma_addr_t scratch_phys;
1676 u16 len, firstlen, secondlen;
1677 u16 seq_number = 0;
1678 __le16 fc;
1679 u8 hdr_len;
1680 u8 sta_id;
1681 u8 wait_write_ptr = 0;
1682 u8 tid = 0;
1683 u8 *qc = NULL;
1684 unsigned long flags;
1685 bool is_agg = false;
1686
1687 spin_lock_irqsave(&il->lock, flags);
1688 if (il_is_rfkill(il)) {
1689 D_DROP("Dropping - RF KILL\n");
1690 goto drop_unlock;
1691 }
1692
1693 fc = hdr->frame_control;
1694
1695 #ifdef CONFIG_IWLEGACY_DEBUG
1696 if (ieee80211_is_auth(fc))
1697 D_TX("Sending AUTH frame\n");
1698 else if (ieee80211_is_assoc_req(fc))
1699 D_TX("Sending ASSOC frame\n");
1700 else if (ieee80211_is_reassoc_req(fc))
1701 D_TX("Sending REASSOC frame\n");
1702 #endif
1703
1704 hdr_len = ieee80211_hdrlen(fc);
1705
1706 /* For management frames use broadcast id to do not break aggregation */
1707 if (!ieee80211_is_data(fc))
1708 sta_id = il->hw_params.bcast_id;
1709 else {
1710 /* Find idx into station table for destination station */
1711 sta_id = il_sta_id_or_broadcast(il, sta);
1712
1713 if (sta_id == IL_INVALID_STATION) {
1714 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
1715 goto drop_unlock;
1716 }
1717 }
1718
1719 D_TX("station Id %d\n", sta_id);
1720
1721 if (sta)
1722 sta_priv = (void *)sta->drv_priv;
1723
1724 if (sta_priv && sta_priv->asleep &&
1725 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
1726 /*
1727 * This sends an asynchronous command to the device,
1728 * but we can rely on it being processed before the
1729 * next frame is processed -- and the next frame to
1730 * this station is the one that will consume this
1731 * counter.
1732 * For now set the counter to just 1 since we do not
1733 * support uAPSD yet.
1734 */
1735 il4965_sta_modify_sleep_tx_count(il, sta_id, 1);
1736 }
1737
1738 /* FIXME: remove me ? */
1739 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1740
1741 /* Access category (AC) is also the queue number */
1742 txq_id = skb_get_queue_mapping(skb);
1743
1744 /* irqs already disabled/saved above when locking il->lock */
1745 spin_lock(&il->sta_lock);
1746
1747 if (ieee80211_is_data_qos(fc)) {
1748 qc = ieee80211_get_qos_ctl(hdr);
1749 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
1750 if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) {
1751 spin_unlock(&il->sta_lock);
1752 goto drop_unlock;
1753 }
1754 seq_number = il->stations[sta_id].tid[tid].seq_number;
1755 seq_number &= IEEE80211_SCTL_SEQ;
1756 hdr->seq_ctrl =
1757 hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG);
1758 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1759 seq_number += 0x10;
1760 /* aggregation is on for this <sta,tid> */
1761 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1762 il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) {
1763 txq_id = il->stations[sta_id].tid[tid].agg.txq_id;
1764 is_agg = true;
1765 }
1766 }
1767
1768 txq = &il->txq[txq_id];
1769 q = &txq->q;
1770
1771 if (unlikely(il_queue_space(q) < q->high_mark)) {
1772 spin_unlock(&il->sta_lock);
1773 goto drop_unlock;
1774 }
1775
1776 if (ieee80211_is_data_qos(fc)) {
1777 il->stations[sta_id].tid[tid].tfds_in_queue++;
1778 if (!ieee80211_has_morefrags(fc))
1779 il->stations[sta_id].tid[tid].seq_number = seq_number;
1780 }
1781
1782 spin_unlock(&il->sta_lock);
1783
1784 txq->skbs[q->write_ptr] = skb;
1785
1786 /* Set up first empty entry in queue's array of Tx/cmd buffers */
1787 out_cmd = txq->cmd[q->write_ptr];
1788 out_meta = &txq->meta[q->write_ptr];
1789 tx_cmd = &out_cmd->cmd.tx;
1790 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
1791 memset(tx_cmd, 0, sizeof(struct il_tx_cmd));
1792
1793 /*
1794 * Set up the Tx-command (not MAC!) header.
1795 * Store the chosen Tx queue and TFD idx within the sequence field;
1796 * after Tx, uCode's Tx response will return this value so driver can
1797 * locate the frame within the tx queue and do post-tx processing.
1798 */
1799 out_cmd->hdr.cmd = C_TX;
1800 out_cmd->hdr.sequence =
1801 cpu_to_le16((u16)
1802 (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
1803
1804 /* Copy MAC header from skb into command buffer */
1805 memcpy(tx_cmd->hdr, hdr, hdr_len);
1806
1807 /* Total # bytes to be transmitted */
1808 tx_cmd->len = cpu_to_le16((u16) skb->len);
1809
1810 if (info->control.hw_key)
1811 il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id);
1812
1813 /* TODO need this for burst mode later on */
1814 il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id);
1815
1816 il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc);
1817
1818 /*
1819 * Use the first empty entry in this queue's command buffer array
1820 * to contain the Tx command and MAC header concatenated together
1821 * (payload data will be in another buffer).
1822 * Size of this varies, due to varying MAC header length.
1823 * If end is not dword aligned, we'll have 2 extra bytes at the end
1824 * of the MAC header (device reads on dword boundaries).
1825 * We'll tell device about this padding later.
1826 */
1827 len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len;
1828 firstlen = (len + 3) & ~3;
1829
1830 /* Tell NIC about any 2-byte padding after MAC header */
1831 if (firstlen != len)
1832 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
1833
1834 /* Physical address of this Tx command's header (not MAC header!),
1835 * within command buffer array. */
1836 txcmd_phys =
1837 pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen,
1838 PCI_DMA_BIDIRECTIONAL);
1839 if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys)))
1840 goto drop_unlock;
1841
1842 /* Set up TFD's 2nd entry to point directly to remainder of skb,
1843 * if any (802.11 null frames have no payload). */
1844 secondlen = skb->len - hdr_len;
1845 if (secondlen > 0) {
1846 phys_addr =
1847 pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen,
1848 PCI_DMA_TODEVICE);
1849 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr)))
1850 goto drop_unlock;
1851 }
1852
1853 /* Add buffer containing Tx command and MAC(!) header to TFD's
1854 * first entry */
1855 il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
1856 dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
1857 dma_unmap_len_set(out_meta, len, firstlen);
1858 if (secondlen)
1859 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen,
1860 0, 0);
1861
1862 if (!ieee80211_has_morefrags(hdr->frame_control)) {
1863 txq->need_update = 1;
1864 } else {
1865 wait_write_ptr = 1;
1866 txq->need_update = 0;
1867 }
1868
1869 scratch_phys =
1870 txcmd_phys + sizeof(struct il_cmd_header) +
1871 offsetof(struct il_tx_cmd, scratch);
1872
1873 /* take back ownership of DMA buffer to enable update */
1874 pci_dma_sync_single_for_cpu(il->pci_dev, txcmd_phys, firstlen,
1875 PCI_DMA_BIDIRECTIONAL);
1876 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
1877 tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys);
1878
1879 il_update_stats(il, true, fc, skb->len);
1880
1881 D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
1882 D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
1883 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd));
1884 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len);
1885
1886 /* Set up entry for this TFD in Tx byte-count array */
1887 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1888 il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len));
1889
1890 pci_dma_sync_single_for_device(il->pci_dev, txcmd_phys, firstlen,
1891 PCI_DMA_BIDIRECTIONAL);
1892
1893 /* Tell device the write idx *just past* this latest filled TFD */
1894 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
1895 il_txq_update_write_ptr(il, txq);
1896 spin_unlock_irqrestore(&il->lock, flags);
1897
1898 /*
1899 * At this point the frame is "transmitted" successfully
1900 * and we will get a TX status notification eventually,
1901 * regardless of the value of ret. "ret" only indicates
1902 * whether or not we should update the write pointer.
1903 */
1904
1905 /*
1906 * Avoid atomic ops if it isn't an associated client.
1907 * Also, if this is a packet for aggregation, don't
1908 * increase the counter because the ucode will stop
1909 * aggregation queues when their respective station
1910 * goes to sleep.
1911 */
1912 if (sta_priv && sta_priv->client && !is_agg)
1913 atomic_inc(&sta_priv->pending_frames);
1914
1915 if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
1916 if (wait_write_ptr) {
1917 spin_lock_irqsave(&il->lock, flags);
1918 txq->need_update = 1;
1919 il_txq_update_write_ptr(il, txq);
1920 spin_unlock_irqrestore(&il->lock, flags);
1921 } else {
1922 il_stop_queue(il, txq);
1923 }
1924 }
1925
1926 return 0;
1927
1928 drop_unlock:
1929 spin_unlock_irqrestore(&il->lock, flags);
1930 return -1;
1931 }
1932
1933 static inline int
1934 il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size)
1935 {
1936 ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma,
1937 GFP_KERNEL);
1938 if (!ptr->addr)
1939 return -ENOMEM;
1940 ptr->size = size;
1941 return 0;
1942 }
1943
1944 static inline void
1945 il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr)
1946 {
1947 if (unlikely(!ptr->addr))
1948 return;
1949
1950 dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma);
1951 memset(ptr, 0, sizeof(*ptr));
1952 }
1953
1954 /**
1955 * il4965_hw_txq_ctx_free - Free TXQ Context
1956 *
1957 * Destroy all TX DMA queues and structures
1958 */
1959 void
1960 il4965_hw_txq_ctx_free(struct il_priv *il)
1961 {
1962 int txq_id;
1963
1964 /* Tx queues */
1965 if (il->txq) {
1966 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
1967 if (txq_id == il->cmd_queue)
1968 il_cmd_queue_free(il);
1969 else
1970 il_tx_queue_free(il, txq_id);
1971 }
1972 il4965_free_dma_ptr(il, &il->kw);
1973
1974 il4965_free_dma_ptr(il, &il->scd_bc_tbls);
1975
1976 /* free tx queue structure */
1977 il_free_txq_mem(il);
1978 }
1979
1980 /**
1981 * il4965_txq_ctx_alloc - allocate TX queue context
1982 * Allocate all Tx DMA structures and initialize them
1983 *
1984 * @param il
1985 * @return error code
1986 */
1987 int
1988 il4965_txq_ctx_alloc(struct il_priv *il)
1989 {
1990 int ret, txq_id;
1991 unsigned long flags;
1992
1993 /* Free all tx/cmd queues and keep-warm buffer */
1994 il4965_hw_txq_ctx_free(il);
1995
1996 ret =
1997 il4965_alloc_dma_ptr(il, &il->scd_bc_tbls,
1998 il->hw_params.scd_bc_tbls_size);
1999 if (ret) {
2000 IL_ERR("Scheduler BC Table allocation failed\n");
2001 goto error_bc_tbls;
2002 }
2003 /* Alloc keep-warm buffer */
2004 ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE);
2005 if (ret) {
2006 IL_ERR("Keep Warm allocation failed\n");
2007 goto error_kw;
2008 }
2009
2010 /* allocate tx queue structure */
2011 ret = il_alloc_txq_mem(il);
2012 if (ret)
2013 goto error;
2014
2015 spin_lock_irqsave(&il->lock, flags);
2016
2017 /* Turn off all Tx DMA fifos */
2018 il4965_txq_set_sched(il, 0);
2019
2020 /* Tell NIC where to find the "keep warm" buffer */
2021 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2022
2023 spin_unlock_irqrestore(&il->lock, flags);
2024
2025 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
2026 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
2027 ret = il_tx_queue_init(il, txq_id);
2028 if (ret) {
2029 IL_ERR("Tx %d queue init failed\n", txq_id);
2030 goto error;
2031 }
2032 }
2033
2034 return ret;
2035
2036 error:
2037 il4965_hw_txq_ctx_free(il);
2038 il4965_free_dma_ptr(il, &il->kw);
2039 error_kw:
2040 il4965_free_dma_ptr(il, &il->scd_bc_tbls);
2041 error_bc_tbls:
2042 return ret;
2043 }
2044
2045 void
2046 il4965_txq_ctx_reset(struct il_priv *il)
2047 {
2048 int txq_id;
2049 unsigned long flags;
2050
2051 spin_lock_irqsave(&il->lock, flags);
2052
2053 /* Turn off all Tx DMA fifos */
2054 il4965_txq_set_sched(il, 0);
2055 /* Tell NIC where to find the "keep warm" buffer */
2056 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2057
2058 spin_unlock_irqrestore(&il->lock, flags);
2059
2060 /* Alloc and init all Tx queues, including the command queue (#4) */
2061 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2062 il_tx_queue_reset(il, txq_id);
2063 }
2064
2065 static void
2066 il4965_txq_ctx_unmap(struct il_priv *il)
2067 {
2068 int txq_id;
2069
2070 if (!il->txq)
2071 return;
2072
2073 /* Unmap DMA from host system and free skb's */
2074 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2075 if (txq_id == il->cmd_queue)
2076 il_cmd_queue_unmap(il);
2077 else
2078 il_tx_queue_unmap(il, txq_id);
2079 }
2080
2081 /**
2082 * il4965_txq_ctx_stop - Stop all Tx DMA channels
2083 */
2084 void
2085 il4965_txq_ctx_stop(struct il_priv *il)
2086 {
2087 int ch, ret;
2088
2089 _il_wr_prph(il, IL49_SCD_TXFACT, 0);
2090
2091 /* Stop each Tx DMA channel, and wait for it to be idle */
2092 for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
2093 _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
2094 ret =
2095 _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG,
2096 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2097 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2098 1000);
2099 if (ret < 0)
2100 IL_ERR("Timeout stopping DMA channel %d [0x%08x]",
2101 ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG));
2102 }
2103 }
2104
2105 /*
2106 * Find first available (lowest unused) Tx Queue, mark it "active".
2107 * Called only when finding queue for aggregation.
2108 * Should never return anything < 7, because they should already
2109 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
2110 */
2111 static int
2112 il4965_txq_ctx_activate_free(struct il_priv *il)
2113 {
2114 int txq_id;
2115
2116 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2117 if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk))
2118 return txq_id;
2119 return -1;
2120 }
2121
2122 /**
2123 * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
2124 */
2125 static void
2126 il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id)
2127 {
2128 /* Simply stop the queue, but don't change any configuration;
2129 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
2130 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
2131 (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
2132 (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
2133 }
2134
2135 /**
2136 * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
2137 */
2138 static int
2139 il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id)
2140 {
2141 u32 tbl_dw_addr;
2142 u32 tbl_dw;
2143 u16 scd_q2ratid;
2144
2145 scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
2146
2147 tbl_dw_addr =
2148 il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
2149
2150 tbl_dw = il_read_targ_mem(il, tbl_dw_addr);
2151
2152 if (txq_id & 0x1)
2153 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
2154 else
2155 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
2156
2157 il_write_targ_mem(il, tbl_dw_addr, tbl_dw);
2158
2159 return 0;
2160 }
2161
2162 /**
2163 * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
2164 *
2165 * NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE,
2166 * i.e. it must be one of the higher queues used for aggregation
2167 */
2168 static int
2169 il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id,
2170 int tid, u16 ssn_idx)
2171 {
2172 unsigned long flags;
2173 u16 ra_tid;
2174 int ret;
2175
2176 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2177 (IL49_FIRST_AMPDU_QUEUE +
2178 il->cfg->num_of_ampdu_queues <= txq_id)) {
2179 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2180 txq_id, IL49_FIRST_AMPDU_QUEUE,
2181 IL49_FIRST_AMPDU_QUEUE +
2182 il->cfg->num_of_ampdu_queues - 1);
2183 return -EINVAL;
2184 }
2185
2186 ra_tid = BUILD_RAxTID(sta_id, tid);
2187
2188 /* Modify device's station table to Tx this TID */
2189 ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid);
2190 if (ret)
2191 return ret;
2192
2193 spin_lock_irqsave(&il->lock, flags);
2194
2195 /* Stop this Tx queue before configuring it */
2196 il4965_tx_queue_stop_scheduler(il, txq_id);
2197
2198 /* Map receiver-address / traffic-ID to this queue */
2199 il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id);
2200
2201 /* Set this queue as a chain-building queue */
2202 il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2203
2204 /* Place first TFD at idx corresponding to start sequence number.
2205 * Assumes that ssn_idx is valid (!= 0xFFF) */
2206 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2207 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2208 il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2209
2210 /* Set up Tx win size and frame limit for this queue */
2211 il_write_targ_mem(il,
2212 il->scd_base_addr +
2213 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
2214 (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS)
2215 & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
2216
2217 il_write_targ_mem(il,
2218 il->scd_base_addr +
2219 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
2220 (SCD_FRAME_LIMIT <<
2221 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
2222 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
2223
2224 il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2225
2226 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
2227 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1);
2228
2229 spin_unlock_irqrestore(&il->lock, flags);
2230
2231 return 0;
2232 }
2233
2234 int
2235 il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif,
2236 struct ieee80211_sta *sta, u16 tid, u16 * ssn)
2237 {
2238 int sta_id;
2239 int tx_fifo;
2240 int txq_id;
2241 int ret;
2242 unsigned long flags;
2243 struct il_tid_data *tid_data;
2244
2245 /* FIXME: warning if tx fifo not found ? */
2246 tx_fifo = il4965_get_fifo_from_tid(tid);
2247 if (unlikely(tx_fifo < 0))
2248 return tx_fifo;
2249
2250 D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid);
2251
2252 sta_id = il_sta_id(sta);
2253 if (sta_id == IL_INVALID_STATION) {
2254 IL_ERR("Start AGG on invalid station\n");
2255 return -ENXIO;
2256 }
2257 if (unlikely(tid >= MAX_TID_COUNT))
2258 return -EINVAL;
2259
2260 if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) {
2261 IL_ERR("Start AGG when state is not IL_AGG_OFF !\n");
2262 return -ENXIO;
2263 }
2264
2265 txq_id = il4965_txq_ctx_activate_free(il);
2266 if (txq_id == -1) {
2267 IL_ERR("No free aggregation queue available\n");
2268 return -ENXIO;
2269 }
2270
2271 spin_lock_irqsave(&il->sta_lock, flags);
2272 tid_data = &il->stations[sta_id].tid[tid];
2273 *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2274 tid_data->agg.txq_id = txq_id;
2275 il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id);
2276 spin_unlock_irqrestore(&il->sta_lock, flags);
2277
2278 ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn);
2279 if (ret)
2280 return ret;
2281
2282 spin_lock_irqsave(&il->sta_lock, flags);
2283 tid_data = &il->stations[sta_id].tid[tid];
2284 if (tid_data->tfds_in_queue == 0) {
2285 D_HT("HW queue is empty\n");
2286 tid_data->agg.state = IL_AGG_ON;
2287 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2288 } else {
2289 D_HT("HW queue is NOT empty: %d packets in HW queue\n",
2290 tid_data->tfds_in_queue);
2291 tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA;
2292 }
2293 spin_unlock_irqrestore(&il->sta_lock, flags);
2294 return ret;
2295 }
2296
2297 /**
2298 * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE
2299 * il->lock must be held by the caller
2300 */
2301 static int
2302 il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo)
2303 {
2304 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2305 (IL49_FIRST_AMPDU_QUEUE +
2306 il->cfg->num_of_ampdu_queues <= txq_id)) {
2307 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2308 txq_id, IL49_FIRST_AMPDU_QUEUE,
2309 IL49_FIRST_AMPDU_QUEUE +
2310 il->cfg->num_of_ampdu_queues - 1);
2311 return -EINVAL;
2312 }
2313
2314 il4965_tx_queue_stop_scheduler(il, txq_id);
2315
2316 il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2317
2318 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2319 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2320 /* supposes that ssn_idx is valid (!= 0xFFF) */
2321 il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2322
2323 il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2324 il_txq_ctx_deactivate(il, txq_id);
2325 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0);
2326
2327 return 0;
2328 }
2329
2330 int
2331 il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif,
2332 struct ieee80211_sta *sta, u16 tid)
2333 {
2334 int tx_fifo_id, txq_id, sta_id, ssn;
2335 struct il_tid_data *tid_data;
2336 int write_ptr, read_ptr;
2337 unsigned long flags;
2338
2339 /* FIXME: warning if tx_fifo_id not found ? */
2340 tx_fifo_id = il4965_get_fifo_from_tid(tid);
2341 if (unlikely(tx_fifo_id < 0))
2342 return tx_fifo_id;
2343
2344 sta_id = il_sta_id(sta);
2345
2346 if (sta_id == IL_INVALID_STATION) {
2347 IL_ERR("Invalid station for AGG tid %d\n", tid);
2348 return -ENXIO;
2349 }
2350
2351 spin_lock_irqsave(&il->sta_lock, flags);
2352
2353 tid_data = &il->stations[sta_id].tid[tid];
2354 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
2355 txq_id = tid_data->agg.txq_id;
2356
2357 switch (il->stations[sta_id].tid[tid].agg.state) {
2358 case IL_EMPTYING_HW_QUEUE_ADDBA:
2359 /*
2360 * This can happen if the peer stops aggregation
2361 * again before we've had a chance to drain the
2362 * queue we selected previously, i.e. before the
2363 * session was really started completely.
2364 */
2365 D_HT("AGG stop before setup done\n");
2366 goto turn_off;
2367 case IL_AGG_ON:
2368 break;
2369 default:
2370 IL_WARN("Stopping AGG while state not ON or starting\n");
2371 }
2372
2373 write_ptr = il->txq[txq_id].q.write_ptr;
2374 read_ptr = il->txq[txq_id].q.read_ptr;
2375
2376 /* The queue is not empty */
2377 if (write_ptr != read_ptr) {
2378 D_HT("Stopping a non empty AGG HW QUEUE\n");
2379 il->stations[sta_id].tid[tid].agg.state =
2380 IL_EMPTYING_HW_QUEUE_DELBA;
2381 spin_unlock_irqrestore(&il->sta_lock, flags);
2382 return 0;
2383 }
2384
2385 D_HT("HW queue is empty\n");
2386 turn_off:
2387 il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF;
2388
2389 /* do not restore/save irqs */
2390 spin_unlock(&il->sta_lock);
2391 spin_lock(&il->lock);
2392
2393 /*
2394 * the only reason this call can fail is queue number out of range,
2395 * which can happen if uCode is reloaded and all the station
2396 * information are lost. if it is outside the range, there is no need
2397 * to deactivate the uCode queue, just return "success" to allow
2398 * mac80211 to clean up it own data.
2399 */
2400 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id);
2401 spin_unlock_irqrestore(&il->lock, flags);
2402
2403 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2404
2405 return 0;
2406 }
2407
2408 int
2409 il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id)
2410 {
2411 struct il_queue *q = &il->txq[txq_id].q;
2412 u8 *addr = il->stations[sta_id].sta.sta.addr;
2413 struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid];
2414
2415 lockdep_assert_held(&il->sta_lock);
2416
2417 switch (il->stations[sta_id].tid[tid].agg.state) {
2418 case IL_EMPTYING_HW_QUEUE_DELBA:
2419 /* We are reclaiming the last packet of the */
2420 /* aggregated HW queue */
2421 if (txq_id == tid_data->agg.txq_id &&
2422 q->read_ptr == q->write_ptr) {
2423 u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2424 int tx_fifo = il4965_get_fifo_from_tid(tid);
2425 D_HT("HW queue empty: continue DELBA flow\n");
2426 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo);
2427 tid_data->agg.state = IL_AGG_OFF;
2428 ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid);
2429 }
2430 break;
2431 case IL_EMPTYING_HW_QUEUE_ADDBA:
2432 /* We are reclaiming the last packet of the queue */
2433 if (tid_data->tfds_in_queue == 0) {
2434 D_HT("HW queue empty: continue ADDBA flow\n");
2435 tid_data->agg.state = IL_AGG_ON;
2436 ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid);
2437 }
2438 break;
2439 }
2440
2441 return 0;
2442 }
2443
2444 static void
2445 il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1)
2446 {
2447 struct ieee80211_sta *sta;
2448 struct il_station_priv *sta_priv;
2449
2450 rcu_read_lock();
2451 sta = ieee80211_find_sta(il->vif, addr1);
2452 if (sta) {
2453 sta_priv = (void *)sta->drv_priv;
2454 /* avoid atomic ops if this isn't a client */
2455 if (sta_priv->client &&
2456 atomic_dec_return(&sta_priv->pending_frames) == 0)
2457 ieee80211_sta_block_awake(il->hw, sta, false);
2458 }
2459 rcu_read_unlock();
2460 }
2461
2462 static void
2463 il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg)
2464 {
2465 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2466
2467 if (!is_agg)
2468 il4965_non_agg_tx_status(il, hdr->addr1);
2469
2470 ieee80211_tx_status_irqsafe(il->hw, skb);
2471 }
2472
2473 int
2474 il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
2475 {
2476 struct il_tx_queue *txq = &il->txq[txq_id];
2477 struct il_queue *q = &txq->q;
2478 int nfreed = 0;
2479 struct ieee80211_hdr *hdr;
2480 struct sk_buff *skb;
2481
2482 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
2483 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
2484 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
2485 q->write_ptr, q->read_ptr);
2486 return 0;
2487 }
2488
2489 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
2490 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2491
2492 skb = txq->skbs[txq->q.read_ptr];
2493
2494 if (WARN_ON_ONCE(skb == NULL))
2495 continue;
2496
2497 hdr = (struct ieee80211_hdr *) skb->data;
2498 if (ieee80211_is_data_qos(hdr->frame_control))
2499 nfreed++;
2500
2501 il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE);
2502
2503 txq->skbs[txq->q.read_ptr] = NULL;
2504 il->ops->txq_free_tfd(il, txq);
2505 }
2506 return nfreed;
2507 }
2508
2509 /**
2510 * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack
2511 *
2512 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
2513 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
2514 */
2515 static int
2516 il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg,
2517 struct il_compressed_ba_resp *ba_resp)
2518 {
2519 int i, sh, ack;
2520 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
2521 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2522 int successes = 0;
2523 struct ieee80211_tx_info *info;
2524 u64 bitmap, sent_bitmap;
2525
2526 if (unlikely(!agg->wait_for_ba)) {
2527 if (unlikely(ba_resp->bitmap))
2528 IL_ERR("Received BA when not expected\n");
2529 return -EINVAL;
2530 }
2531
2532 /* Mark that the expected block-ack response arrived */
2533 agg->wait_for_ba = 0;
2534 D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
2535
2536 /* Calculate shift to align block-ack bits with our Tx win bits */
2537 sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4);
2538 if (sh < 0) /* tbw something is wrong with indices */
2539 sh += 0x100;
2540
2541 if (agg->frame_count > (64 - sh)) {
2542 D_TX_REPLY("more frames than bitmap size");
2543 return -1;
2544 }
2545
2546 /* don't use 64-bit values for now */
2547 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
2548
2549 /* check for success or failure according to the
2550 * transmitted bitmap and block-ack bitmap */
2551 sent_bitmap = bitmap & agg->bitmap;
2552
2553 /* For each frame attempted in aggregation,
2554 * update driver's record of tx frame's status. */
2555 i = 0;
2556 while (sent_bitmap) {
2557 ack = sent_bitmap & 1ULL;
2558 successes += ack;
2559 D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK",
2560 i, (agg->start_idx + i) & 0xff, agg->start_idx + i);
2561 sent_bitmap >>= 1;
2562 ++i;
2563 }
2564
2565 D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
2566
2567 info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]);
2568 memset(&info->status, 0, sizeof(info->status));
2569 info->flags |= IEEE80211_TX_STAT_ACK;
2570 info->flags |= IEEE80211_TX_STAT_AMPDU;
2571 info->status.ampdu_ack_len = successes;
2572 info->status.ampdu_len = agg->frame_count;
2573 il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info);
2574
2575 return 0;
2576 }
2577
2578 static inline bool
2579 il4965_is_tx_success(u32 status)
2580 {
2581 status &= TX_STATUS_MSK;
2582 return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE);
2583 }
2584
2585 static u8
2586 il4965_find_station(struct il_priv *il, const u8 *addr)
2587 {
2588 int i;
2589 int start = 0;
2590 int ret = IL_INVALID_STATION;
2591 unsigned long flags;
2592
2593 if (il->iw_mode == NL80211_IFTYPE_ADHOC)
2594 start = IL_STA_ID;
2595
2596 if (is_broadcast_ether_addr(addr))
2597 return il->hw_params.bcast_id;
2598
2599 spin_lock_irqsave(&il->sta_lock, flags);
2600 for (i = start; i < il->hw_params.max_stations; i++)
2601 if (il->stations[i].used &&
2602 ether_addr_equal(il->stations[i].sta.sta.addr, addr)) {
2603 ret = i;
2604 goto out;
2605 }
2606
2607 D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations);
2608
2609 out:
2610 /*
2611 * It may be possible that more commands interacting with stations
2612 * arrive before we completed processing the adding of
2613 * station
2614 */
2615 if (ret != IL_INVALID_STATION &&
2616 (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) ||
2617 ((il->stations[ret].used & IL_STA_UCODE_ACTIVE) &&
2618 (il->stations[ret].used & IL_STA_UCODE_INPROGRESS)))) {
2619 IL_ERR("Requested station info for sta %d before ready.\n",
2620 ret);
2621 ret = IL_INVALID_STATION;
2622 }
2623 spin_unlock_irqrestore(&il->sta_lock, flags);
2624 return ret;
2625 }
2626
2627 static int
2628 il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr)
2629 {
2630 if (il->iw_mode == NL80211_IFTYPE_STATION)
2631 return IL_AP_ID;
2632 else {
2633 u8 *da = ieee80211_get_DA(hdr);
2634
2635 return il4965_find_station(il, da);
2636 }
2637 }
2638
2639 static inline u32
2640 il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp)
2641 {
2642 return le32_to_cpup(&tx_resp->u.status +
2643 tx_resp->frame_count) & IEEE80211_MAX_SN;
2644 }
2645
2646 static inline u32
2647 il4965_tx_status_to_mac80211(u32 status)
2648 {
2649 status &= TX_STATUS_MSK;
2650
2651 switch (status) {
2652 case TX_STATUS_SUCCESS:
2653 case TX_STATUS_DIRECT_DONE:
2654 return IEEE80211_TX_STAT_ACK;
2655 case TX_STATUS_FAIL_DEST_PS:
2656 return IEEE80211_TX_STAT_TX_FILTERED;
2657 default:
2658 return 0;
2659 }
2660 }
2661
2662 /**
2663 * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
2664 */
2665 static int
2666 il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg,
2667 struct il4965_tx_resp *tx_resp, int txq_id,
2668 u16 start_idx)
2669 {
2670 u16 status;
2671 struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2672 struct ieee80211_tx_info *info = NULL;
2673 struct ieee80211_hdr *hdr = NULL;
2674 u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2675 int i, sh, idx;
2676 u16 seq;
2677 if (agg->wait_for_ba)
2678 D_TX_REPLY("got tx response w/o block-ack\n");
2679
2680 agg->frame_count = tx_resp->frame_count;
2681 agg->start_idx = start_idx;
2682 agg->rate_n_flags = rate_n_flags;
2683 agg->bitmap = 0;
2684
2685 /* num frames attempted by Tx command */
2686 if (agg->frame_count == 1) {
2687 /* Only one frame was attempted; no block-ack will arrive */
2688 status = le16_to_cpu(frame_status[0].status);
2689 idx = start_idx;
2690
2691 D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2692 agg->frame_count, agg->start_idx, idx);
2693
2694 info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]);
2695 info->status.rates[0].count = tx_resp->failure_frame + 1;
2696 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2697 info->flags |= il4965_tx_status_to_mac80211(status);
2698 il4965_hwrate_to_tx_control(il, rate_n_flags, info);
2699
2700 D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff,
2701 tx_resp->failure_frame);
2702 D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
2703
2704 agg->wait_for_ba = 0;
2705 } else {
2706 /* Two or more frames were attempted; expect block-ack */
2707 u64 bitmap = 0;
2708 int start = agg->start_idx;
2709 struct sk_buff *skb;
2710
2711 /* Construct bit-map of pending frames within Tx win */
2712 for (i = 0; i < agg->frame_count; i++) {
2713 u16 sc;
2714 status = le16_to_cpu(frame_status[i].status);
2715 seq = le16_to_cpu(frame_status[i].sequence);
2716 idx = SEQ_TO_IDX(seq);
2717 txq_id = SEQ_TO_QUEUE(seq);
2718
2719 if (status &
2720 (AGG_TX_STATE_FEW_BYTES_MSK |
2721 AGG_TX_STATE_ABORT_MSK))
2722 continue;
2723
2724 D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2725 agg->frame_count, txq_id, idx);
2726
2727 skb = il->txq[txq_id].skbs[idx];
2728 if (WARN_ON_ONCE(skb == NULL))
2729 return -1;
2730 hdr = (struct ieee80211_hdr *) skb->data;
2731
2732 sc = le16_to_cpu(hdr->seq_ctrl);
2733 if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) {
2734 IL_ERR("BUG_ON idx doesn't match seq control"
2735 " idx=%d, seq_idx=%d, seq=%d\n", idx,
2736 IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl);
2737 return -1;
2738 }
2739
2740 D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx,
2741 IEEE80211_SEQ_TO_SN(sc));
2742
2743 sh = idx - start;
2744 if (sh > 64) {
2745 sh = (start - idx) + 0xff;
2746 bitmap = bitmap << sh;
2747 sh = 0;
2748 start = idx;
2749 } else if (sh < -64)
2750 sh = 0xff - (start - idx);
2751 else if (sh < 0) {
2752 sh = start - idx;
2753 start = idx;
2754 bitmap = bitmap << sh;
2755 sh = 0;
2756 }
2757 bitmap |= 1ULL << sh;
2758 D_TX_REPLY("start=%d bitmap=0x%llx\n", start,
2759 (unsigned long long)bitmap);
2760 }
2761
2762 agg->bitmap = bitmap;
2763 agg->start_idx = start;
2764 D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2765 agg->frame_count, agg->start_idx,
2766 (unsigned long long)agg->bitmap);
2767
2768 if (bitmap)
2769 agg->wait_for_ba = 1;
2770 }
2771 return 0;
2772 }
2773
2774 /**
2775 * il4965_hdl_tx - Handle standard (non-aggregation) Tx response
2776 */
2777 static void
2778 il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
2779 {
2780 struct il_rx_pkt *pkt = rxb_addr(rxb);
2781 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2782 int txq_id = SEQ_TO_QUEUE(sequence);
2783 int idx = SEQ_TO_IDX(sequence);
2784 struct il_tx_queue *txq = &il->txq[txq_id];
2785 struct sk_buff *skb;
2786 struct ieee80211_hdr *hdr;
2787 struct ieee80211_tx_info *info;
2788 struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2789 u32 status = le32_to_cpu(tx_resp->u.status);
2790 int uninitialized_var(tid);
2791 int sta_id;
2792 int freed;
2793 u8 *qc = NULL;
2794 unsigned long flags;
2795
2796 if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) {
2797 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d "
2798 "is out of range [0-%d] %d %d\n", txq_id, idx,
2799 txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr);
2800 return;
2801 }
2802
2803 txq->time_stamp = jiffies;
2804
2805 skb = txq->skbs[txq->q.read_ptr];
2806 info = IEEE80211_SKB_CB(skb);
2807 memset(&info->status, 0, sizeof(info->status));
2808
2809 hdr = (struct ieee80211_hdr *) skb->data;
2810 if (ieee80211_is_data_qos(hdr->frame_control)) {
2811 qc = ieee80211_get_qos_ctl(hdr);
2812 tid = qc[0] & 0xf;
2813 }
2814
2815 sta_id = il4965_get_ra_sta_id(il, hdr);
2816 if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) {
2817 IL_ERR("Station not known\n");
2818 return;
2819 }
2820
2821 /*
2822 * Firmware will not transmit frame on passive channel, if it not yet
2823 * received some valid frame on that channel. When this error happen
2824 * we have to wait until firmware will unblock itself i.e. when we
2825 * note received beacon or other frame. We unblock queues in
2826 * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed.
2827 */
2828 if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) &&
2829 il->iw_mode == NL80211_IFTYPE_STATION) {
2830 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
2831 D_INFO("Stopped queues - RX waiting on passive channel\n");
2832 }
2833
2834 spin_lock_irqsave(&il->sta_lock, flags);
2835 if (txq->sched_retry) {
2836 const u32 scd_ssn = il4965_get_scd_ssn(tx_resp);
2837 struct il_ht_agg *agg = NULL;
2838 WARN_ON(!qc);
2839
2840 agg = &il->stations[sta_id].tid[tid].agg;
2841
2842 il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx);
2843
2844 /* check if BAR is needed */
2845 if (tx_resp->frame_count == 1 &&
2846 !il4965_is_tx_success(status))
2847 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2848
2849 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2850 idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2851 D_TX_REPLY("Retry scheduler reclaim scd_ssn "
2852 "%d idx %d\n", scd_ssn, idx);
2853 freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2854 if (qc)
2855 il4965_free_tfds_in_queue(il, sta_id, tid,
2856 freed);
2857
2858 if (il->mac80211_registered &&
2859 il_queue_space(&txq->q) > txq->q.low_mark &&
2860 agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2861 il_wake_queue(il, txq);
2862 }
2863 } else {
2864 info->status.rates[0].count = tx_resp->failure_frame + 1;
2865 info->flags |= il4965_tx_status_to_mac80211(status);
2866 il4965_hwrate_to_tx_control(il,
2867 le32_to_cpu(tx_resp->rate_n_flags),
2868 info);
2869
2870 D_TX_REPLY("TXQ %d status %s (0x%08x) "
2871 "rate_n_flags 0x%x retries %d\n", txq_id,
2872 il4965_get_tx_fail_reason(status), status,
2873 le32_to_cpu(tx_resp->rate_n_flags),
2874 tx_resp->failure_frame);
2875
2876 freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2877 if (qc && likely(sta_id != IL_INVALID_STATION))
2878 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2879 else if (sta_id == IL_INVALID_STATION)
2880 D_TX_REPLY("Station not known\n");
2881
2882 if (il->mac80211_registered &&
2883 il_queue_space(&txq->q) > txq->q.low_mark)
2884 il_wake_queue(il, txq);
2885 }
2886 if (qc && likely(sta_id != IL_INVALID_STATION))
2887 il4965_txq_check_empty(il, sta_id, tid, txq_id);
2888
2889 il4965_check_abort_status(il, tx_resp->frame_count, status);
2890
2891 spin_unlock_irqrestore(&il->sta_lock, flags);
2892 }
2893
2894 /**
2895 * translate ucode response to mac80211 tx status control values
2896 */
2897 void
2898 il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags,
2899 struct ieee80211_tx_info *info)
2900 {
2901 struct ieee80211_tx_rate *r = &info->status.rates[0];
2902
2903 info->status.antenna =
2904 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
2905 if (rate_n_flags & RATE_MCS_HT_MSK)
2906 r->flags |= IEEE80211_TX_RC_MCS;
2907 if (rate_n_flags & RATE_MCS_GF_MSK)
2908 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
2909 if (rate_n_flags & RATE_MCS_HT40_MSK)
2910 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2911 if (rate_n_flags & RATE_MCS_DUP_MSK)
2912 r->flags |= IEEE80211_TX_RC_DUP_DATA;
2913 if (rate_n_flags & RATE_MCS_SGI_MSK)
2914 r->flags |= IEEE80211_TX_RC_SHORT_GI;
2915 r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band);
2916 }
2917
2918 /**
2919 * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA
2920 *
2921 * Handles block-acknowledge notification from device, which reports success
2922 * of frames sent via aggregation.
2923 */
2924 static void
2925 il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb)
2926 {
2927 struct il_rx_pkt *pkt = rxb_addr(rxb);
2928 struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
2929 struct il_tx_queue *txq = NULL;
2930 struct il_ht_agg *agg;
2931 int idx;
2932 int sta_id;
2933 int tid;
2934 unsigned long flags;
2935
2936 /* "flow" corresponds to Tx queue */
2937 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2938
2939 /* "ssn" is start of block-ack Tx win, corresponds to idx
2940 * (in Tx queue's circular buffer) of first TFD/frame in win */
2941 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
2942
2943 if (scd_flow >= il->hw_params.max_txq_num) {
2944 IL_ERR("BUG_ON scd_flow is bigger than number of queues\n");
2945 return;
2946 }
2947
2948 txq = &il->txq[scd_flow];
2949 sta_id = ba_resp->sta_id;
2950 tid = ba_resp->tid;
2951 agg = &il->stations[sta_id].tid[tid].agg;
2952 if (unlikely(agg->txq_id != scd_flow)) {
2953 /*
2954 * FIXME: this is a uCode bug which need to be addressed,
2955 * log the information and return for now!
2956 * since it is possible happen very often and in order
2957 * not to fill the syslog, don't enable the logging by default
2958 */
2959 D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n",
2960 scd_flow, agg->txq_id);
2961 return;
2962 }
2963
2964 /* Find idx just before block-ack win */
2965 idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
2966
2967 spin_lock_irqsave(&il->sta_lock, flags);
2968
2969 D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n",
2970 agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32,
2971 ba_resp->sta_id);
2972 D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = "
2973 "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl,
2974 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
2975 ba_resp->scd_flow, ba_resp->scd_ssn);
2976 D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx,
2977 (unsigned long long)agg->bitmap);
2978
2979 /* Update driver's record of ACK vs. not for each frame in win */
2980 il4965_tx_status_reply_compressed_ba(il, agg, ba_resp);
2981
2982 /* Release all TFDs before the SSN, i.e. all TFDs in front of
2983 * block-ack win (we assume that they've been successfully
2984 * transmitted ... if not, it's too late anyway). */
2985 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
2986 /* calculate mac80211 ampdu sw queue to wake */
2987 int freed = il4965_tx_queue_reclaim(il, scd_flow, idx);
2988 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2989
2990 if (il_queue_space(&txq->q) > txq->q.low_mark &&
2991 il->mac80211_registered &&
2992 agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2993 il_wake_queue(il, txq);
2994
2995 il4965_txq_check_empty(il, sta_id, tid, scd_flow);
2996 }
2997
2998 spin_unlock_irqrestore(&il->sta_lock, flags);
2999 }
3000
3001 #ifdef CONFIG_IWLEGACY_DEBUG
3002 const char *
3003 il4965_get_tx_fail_reason(u32 status)
3004 {
3005 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
3006 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
3007
3008 switch (status & TX_STATUS_MSK) {
3009 case TX_STATUS_SUCCESS:
3010 return "SUCCESS";
3011 TX_STATUS_POSTPONE(DELAY);
3012 TX_STATUS_POSTPONE(FEW_BYTES);
3013 TX_STATUS_POSTPONE(QUIET_PERIOD);
3014 TX_STATUS_POSTPONE(CALC_TTAK);
3015 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
3016 TX_STATUS_FAIL(SHORT_LIMIT);
3017 TX_STATUS_FAIL(LONG_LIMIT);
3018 TX_STATUS_FAIL(FIFO_UNDERRUN);
3019 TX_STATUS_FAIL(DRAIN_FLOW);
3020 TX_STATUS_FAIL(RFKILL_FLUSH);
3021 TX_STATUS_FAIL(LIFE_EXPIRE);
3022 TX_STATUS_FAIL(DEST_PS);
3023 TX_STATUS_FAIL(HOST_ABORTED);
3024 TX_STATUS_FAIL(BT_RETRY);
3025 TX_STATUS_FAIL(STA_INVALID);
3026 TX_STATUS_FAIL(FRAG_DROPPED);
3027 TX_STATUS_FAIL(TID_DISABLE);
3028 TX_STATUS_FAIL(FIFO_FLUSHED);
3029 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
3030 TX_STATUS_FAIL(PASSIVE_NO_RX);
3031 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
3032 }
3033
3034 return "UNKNOWN";
3035
3036 #undef TX_STATUS_FAIL
3037 #undef TX_STATUS_POSTPONE
3038 }
3039 #endif /* CONFIG_IWLEGACY_DEBUG */
3040
3041 static struct il_link_quality_cmd *
3042 il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id)
3043 {
3044 int i, r;
3045 struct il_link_quality_cmd *link_cmd;
3046 u32 rate_flags = 0;
3047 __le32 rate_n_flags;
3048
3049 link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL);
3050 if (!link_cmd) {
3051 IL_ERR("Unable to allocate memory for LQ cmd.\n");
3052 return NULL;
3053 }
3054 /* Set up the rate scaling to start at selected rate, fall back
3055 * all the way down to 1M in IEEE order, and then spin on 1M */
3056 if (il->band == NL80211_BAND_5GHZ)
3057 r = RATE_6M_IDX;
3058 else
3059 r = RATE_1M_IDX;
3060
3061 if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE)
3062 rate_flags |= RATE_MCS_CCK_MSK;
3063
3064 rate_flags |=
3065 il4965_first_antenna(il->hw_params.
3066 valid_tx_ant) << RATE_MCS_ANT_POS;
3067 rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags);
3068 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
3069 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
3070
3071 link_cmd->general_params.single_stream_ant_msk =
3072 il4965_first_antenna(il->hw_params.valid_tx_ant);
3073
3074 link_cmd->general_params.dual_stream_ant_msk =
3075 il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params.
3076 valid_tx_ant);
3077 if (!link_cmd->general_params.dual_stream_ant_msk) {
3078 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
3079 } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) {
3080 link_cmd->general_params.dual_stream_ant_msk =
3081 il->hw_params.valid_tx_ant;
3082 }
3083
3084 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
3085 link_cmd->agg_params.agg_time_limit =
3086 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
3087
3088 link_cmd->sta_id = sta_id;
3089
3090 return link_cmd;
3091 }
3092
3093 /*
3094 * il4965_add_bssid_station - Add the special IBSS BSSID station
3095 *
3096 * Function sleeps.
3097 */
3098 int
3099 il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r)
3100 {
3101 int ret;
3102 u8 sta_id;
3103 struct il_link_quality_cmd *link_cmd;
3104 unsigned long flags;
3105
3106 if (sta_id_r)
3107 *sta_id_r = IL_INVALID_STATION;
3108
3109 ret = il_add_station_common(il, addr, 0, NULL, &sta_id);
3110 if (ret) {
3111 IL_ERR("Unable to add station %pM\n", addr);
3112 return ret;
3113 }
3114
3115 if (sta_id_r)
3116 *sta_id_r = sta_id;
3117
3118 spin_lock_irqsave(&il->sta_lock, flags);
3119 il->stations[sta_id].used |= IL_STA_LOCAL;
3120 spin_unlock_irqrestore(&il->sta_lock, flags);
3121
3122 /* Set up default rate scaling table in device's station table */
3123 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3124 if (!link_cmd) {
3125 IL_ERR("Unable to initialize rate scaling for station %pM.\n",
3126 addr);
3127 return -ENOMEM;
3128 }
3129
3130 ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true);
3131 if (ret)
3132 IL_ERR("Link quality command failed (%d)\n", ret);
3133
3134 spin_lock_irqsave(&il->sta_lock, flags);
3135 il->stations[sta_id].lq = link_cmd;
3136 spin_unlock_irqrestore(&il->sta_lock, flags);
3137
3138 return 0;
3139 }
3140
3141 static int
3142 il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty)
3143 {
3144 int i;
3145 u8 buff[sizeof(struct il_wep_cmd) +
3146 sizeof(struct il_wep_key) * WEP_KEYS_MAX];
3147 struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff;
3148 size_t cmd_size = sizeof(struct il_wep_cmd);
3149 struct il_host_cmd cmd = {
3150 .id = C_WEPKEY,
3151 .data = wep_cmd,
3152 .flags = CMD_SYNC,
3153 };
3154 bool not_empty = false;
3155
3156 might_sleep();
3157
3158 memset(wep_cmd, 0,
3159 cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX));
3160
3161 for (i = 0; i < WEP_KEYS_MAX; i++) {
3162 u8 key_size = il->_4965.wep_keys[i].key_size;
3163
3164 wep_cmd->key[i].key_idx = i;
3165 if (key_size) {
3166 wep_cmd->key[i].key_offset = i;
3167 not_empty = true;
3168 } else
3169 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
3170
3171 wep_cmd->key[i].key_size = key_size;
3172 memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size);
3173 }
3174
3175 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
3176 wep_cmd->num_keys = WEP_KEYS_MAX;
3177
3178 cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX;
3179 cmd.len = cmd_size;
3180
3181 if (not_empty || send_if_empty)
3182 return il_send_cmd(il, &cmd);
3183 else
3184 return 0;
3185 }
3186
3187 int
3188 il4965_restore_default_wep_keys(struct il_priv *il)
3189 {
3190 lockdep_assert_held(&il->mutex);
3191
3192 return il4965_static_wepkey_cmd(il, false);
3193 }
3194
3195 int
3196 il4965_remove_default_wep_key(struct il_priv *il,
3197 struct ieee80211_key_conf *keyconf)
3198 {
3199 int ret;
3200 int idx = keyconf->keyidx;
3201
3202 lockdep_assert_held(&il->mutex);
3203
3204 D_WEP("Removing default WEP key: idx=%d\n", idx);
3205
3206 memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key));
3207 if (il_is_rfkill(il)) {
3208 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n");
3209 /* but keys in device are clear anyway so return success */
3210 return 0;
3211 }
3212 ret = il4965_static_wepkey_cmd(il, 1);
3213 D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret);
3214
3215 return ret;
3216 }
3217
3218 int
3219 il4965_set_default_wep_key(struct il_priv *il,
3220 struct ieee80211_key_conf *keyconf)
3221 {
3222 int ret;
3223 int len = keyconf->keylen;
3224 int idx = keyconf->keyidx;
3225
3226 lockdep_assert_held(&il->mutex);
3227
3228 if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) {
3229 D_WEP("Bad WEP key length %d\n", keyconf->keylen);
3230 return -EINVAL;
3231 }
3232
3233 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3234 keyconf->hw_key_idx = HW_KEY_DEFAULT;
3235 il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher;
3236
3237 il->_4965.wep_keys[idx].key_size = len;
3238 memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len);
3239
3240 ret = il4965_static_wepkey_cmd(il, false);
3241
3242 D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret);
3243 return ret;
3244 }
3245
3246 static int
3247 il4965_set_wep_dynamic_key_info(struct il_priv *il,
3248 struct ieee80211_key_conf *keyconf, u8 sta_id)
3249 {
3250 unsigned long flags;
3251 __le16 key_flags = 0;
3252 struct il_addsta_cmd sta_cmd;
3253
3254 lockdep_assert_held(&il->mutex);
3255
3256 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3257
3258 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
3259 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3260 key_flags &= ~STA_KEY_FLG_INVALID;
3261
3262 if (keyconf->keylen == WEP_KEY_LEN_128)
3263 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
3264
3265 if (sta_id == il->hw_params.bcast_id)
3266 key_flags |= STA_KEY_MULTICAST_MSK;
3267
3268 spin_lock_irqsave(&il->sta_lock, flags);
3269
3270 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3271 il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3272 il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
3273
3274 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3275
3276 memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key,
3277 keyconf->keylen);
3278
3279 if ((il->stations[sta_id].sta.key.
3280 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3281 il->stations[sta_id].sta.key.key_offset =
3282 il_get_free_ucode_key_idx(il);
3283 /* else, we are overriding an existing key => no need to allocated room
3284 * in uCode. */
3285
3286 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3287 "no space for a new key");
3288
3289 il->stations[sta_id].sta.key.key_flags = key_flags;
3290 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3291 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3292
3293 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3294 sizeof(struct il_addsta_cmd));
3295 spin_unlock_irqrestore(&il->sta_lock, flags);
3296
3297 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3298 }
3299
3300 static int
3301 il4965_set_ccmp_dynamic_key_info(struct il_priv *il,
3302 struct ieee80211_key_conf *keyconf, u8 sta_id)
3303 {
3304 unsigned long flags;
3305 __le16 key_flags = 0;
3306 struct il_addsta_cmd sta_cmd;
3307
3308 lockdep_assert_held(&il->mutex);
3309
3310 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
3311 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3312 key_flags &= ~STA_KEY_FLG_INVALID;
3313
3314 if (sta_id == il->hw_params.bcast_id)
3315 key_flags |= STA_KEY_MULTICAST_MSK;
3316
3317 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3318
3319 spin_lock_irqsave(&il->sta_lock, flags);
3320 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3321 il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3322
3323 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3324
3325 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
3326
3327 if ((il->stations[sta_id].sta.key.
3328 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3329 il->stations[sta_id].sta.key.key_offset =
3330 il_get_free_ucode_key_idx(il);
3331 /* else, we are overriding an existing key => no need to allocated room
3332 * in uCode. */
3333
3334 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3335 "no space for a new key");
3336
3337 il->stations[sta_id].sta.key.key_flags = key_flags;
3338 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3339 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3340
3341 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3342 sizeof(struct il_addsta_cmd));
3343 spin_unlock_irqrestore(&il->sta_lock, flags);
3344
3345 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3346 }
3347
3348 static int
3349 il4965_set_tkip_dynamic_key_info(struct il_priv *il,
3350 struct ieee80211_key_conf *keyconf, u8 sta_id)
3351 {
3352 unsigned long flags;
3353 int ret = 0;
3354 __le16 key_flags = 0;
3355
3356 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
3357 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3358 key_flags &= ~STA_KEY_FLG_INVALID;
3359
3360 if (sta_id == il->hw_params.bcast_id)
3361 key_flags |= STA_KEY_MULTICAST_MSK;
3362
3363 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3364 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
3365
3366 spin_lock_irqsave(&il->sta_lock, flags);
3367
3368 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3369 il->stations[sta_id].keyinfo.keylen = 16;
3370
3371 if ((il->stations[sta_id].sta.key.
3372 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3373 il->stations[sta_id].sta.key.key_offset =
3374 il_get_free_ucode_key_idx(il);
3375 /* else, we are overriding an existing key => no need to allocated room
3376 * in uCode. */
3377
3378 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3379 "no space for a new key");
3380
3381 il->stations[sta_id].sta.key.key_flags = key_flags;
3382
3383 /* This copy is acutally not needed: we get the key with each TX */
3384 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16);
3385
3386 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16);
3387
3388 spin_unlock_irqrestore(&il->sta_lock, flags);
3389
3390 return ret;
3391 }
3392
3393 void
3394 il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3395 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
3396 {
3397 u8 sta_id;
3398 unsigned long flags;
3399 int i;
3400
3401 if (il_scan_cancel(il)) {
3402 /* cancel scan failed, just live w/ bad key and rely
3403 briefly on SW decryption */
3404 return;
3405 }
3406
3407 sta_id = il_sta_id_or_broadcast(il, sta);
3408 if (sta_id == IL_INVALID_STATION)
3409 return;
3410
3411 spin_lock_irqsave(&il->sta_lock, flags);
3412
3413 il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
3414
3415 for (i = 0; i < 5; i++)
3416 il->stations[sta_id].sta.key.tkip_rx_ttak[i] =
3417 cpu_to_le16(phase1key[i]);
3418
3419 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3420 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3421
3422 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3423
3424 spin_unlock_irqrestore(&il->sta_lock, flags);
3425 }
3426
3427 int
3428 il4965_remove_dynamic_key(struct il_priv *il,
3429 struct ieee80211_key_conf *keyconf, u8 sta_id)
3430 {
3431 unsigned long flags;
3432 u16 key_flags;
3433 u8 keyidx;
3434 struct il_addsta_cmd sta_cmd;
3435
3436 lockdep_assert_held(&il->mutex);
3437
3438 il->_4965.key_mapping_keys--;
3439
3440 spin_lock_irqsave(&il->sta_lock, flags);
3441 key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags);
3442 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
3443
3444 D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id);
3445
3446 if (keyconf->keyidx != keyidx) {
3447 /* We need to remove a key with idx different that the one
3448 * in the uCode. This means that the key we need to remove has
3449 * been replaced by another one with different idx.
3450 * Don't do anything and return ok
3451 */
3452 spin_unlock_irqrestore(&il->sta_lock, flags);
3453 return 0;
3454 }
3455
3456 if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) {
3457 IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx,
3458 key_flags);
3459 spin_unlock_irqrestore(&il->sta_lock, flags);
3460 return 0;
3461 }
3462
3463 if (!test_and_clear_bit
3464 (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table))
3465 IL_ERR("idx %d not used in uCode key table.\n",
3466 il->stations[sta_id].sta.key.key_offset);
3467 memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
3468 memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
3469 il->stations[sta_id].sta.key.key_flags =
3470 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
3471 il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx;
3472 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3473 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3474
3475 if (il_is_rfkill(il)) {
3476 D_WEP
3477 ("Not sending C_ADD_STA command because RFKILL enabled.\n");
3478 spin_unlock_irqrestore(&il->sta_lock, flags);
3479 return 0;
3480 }
3481 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3482 sizeof(struct il_addsta_cmd));
3483 spin_unlock_irqrestore(&il->sta_lock, flags);
3484
3485 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3486 }
3487
3488 int
3489 il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3490 u8 sta_id)
3491 {
3492 int ret;
3493
3494 lockdep_assert_held(&il->mutex);
3495
3496 il->_4965.key_mapping_keys++;
3497 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
3498
3499 switch (keyconf->cipher) {
3500 case WLAN_CIPHER_SUITE_CCMP:
3501 ret =
3502 il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
3503 break;
3504 case WLAN_CIPHER_SUITE_TKIP:
3505 ret =
3506 il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id);
3507 break;
3508 case WLAN_CIPHER_SUITE_WEP40:
3509 case WLAN_CIPHER_SUITE_WEP104:
3510 ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id);
3511 break;
3512 default:
3513 IL_ERR("Unknown alg: %s cipher = %x\n", __func__,
3514 keyconf->cipher);
3515 ret = -EINVAL;
3516 }
3517
3518 D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n",
3519 keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
3520
3521 return ret;
3522 }
3523
3524 /**
3525 * il4965_alloc_bcast_station - add broadcast station into driver's station table.
3526 *
3527 * This adds the broadcast station into the driver's station table
3528 * and marks it driver active, so that it will be restored to the
3529 * device at the next best time.
3530 */
3531 int
3532 il4965_alloc_bcast_station(struct il_priv *il)
3533 {
3534 struct il_link_quality_cmd *link_cmd;
3535 unsigned long flags;
3536 u8 sta_id;
3537
3538 spin_lock_irqsave(&il->sta_lock, flags);
3539 sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
3540 if (sta_id == IL_INVALID_STATION) {
3541 IL_ERR("Unable to prepare broadcast station\n");
3542 spin_unlock_irqrestore(&il->sta_lock, flags);
3543
3544 return -EINVAL;
3545 }
3546
3547 il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
3548 il->stations[sta_id].used |= IL_STA_BCAST;
3549 spin_unlock_irqrestore(&il->sta_lock, flags);
3550
3551 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3552 if (!link_cmd) {
3553 IL_ERR
3554 ("Unable to initialize rate scaling for bcast station.\n");
3555 return -ENOMEM;
3556 }
3557
3558 spin_lock_irqsave(&il->sta_lock, flags);
3559 il->stations[sta_id].lq = link_cmd;
3560 spin_unlock_irqrestore(&il->sta_lock, flags);
3561
3562 return 0;
3563 }
3564
3565 /**
3566 * il4965_update_bcast_station - update broadcast station's LQ command
3567 *
3568 * Only used by iwl4965. Placed here to have all bcast station management
3569 * code together.
3570 */
3571 static int
3572 il4965_update_bcast_station(struct il_priv *il)
3573 {
3574 unsigned long flags;
3575 struct il_link_quality_cmd *link_cmd;
3576 u8 sta_id = il->hw_params.bcast_id;
3577
3578 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3579 if (!link_cmd) {
3580 IL_ERR("Unable to initialize rate scaling for bcast sta.\n");
3581 return -ENOMEM;
3582 }
3583
3584 spin_lock_irqsave(&il->sta_lock, flags);
3585 if (il->stations[sta_id].lq)
3586 kfree(il->stations[sta_id].lq);
3587 else
3588 D_INFO("Bcast sta rate scaling has not been initialized.\n");
3589 il->stations[sta_id].lq = link_cmd;
3590 spin_unlock_irqrestore(&il->sta_lock, flags);
3591
3592 return 0;
3593 }
3594
3595 int
3596 il4965_update_bcast_stations(struct il_priv *il)
3597 {
3598 return il4965_update_bcast_station(il);
3599 }
3600
3601 /**
3602 * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
3603 */
3604 int
3605 il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid)
3606 {
3607 unsigned long flags;
3608 struct il_addsta_cmd sta_cmd;
3609
3610 lockdep_assert_held(&il->mutex);
3611
3612 /* Remove "disable" flag, to enable Tx for this TID */
3613 spin_lock_irqsave(&il->sta_lock, flags);
3614 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
3615 il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
3616 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3617 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3618 sizeof(struct il_addsta_cmd));
3619 spin_unlock_irqrestore(&il->sta_lock, flags);
3620
3621 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3622 }
3623
3624 int
3625 il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid,
3626 u16 ssn)
3627 {
3628 unsigned long flags;
3629 int sta_id;
3630 struct il_addsta_cmd sta_cmd;
3631
3632 lockdep_assert_held(&il->mutex);
3633
3634 sta_id = il_sta_id(sta);
3635 if (sta_id == IL_INVALID_STATION)
3636 return -ENXIO;
3637
3638 spin_lock_irqsave(&il->sta_lock, flags);
3639 il->stations[sta_id].sta.station_flags_msk = 0;
3640 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3641 il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid;
3642 il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3643 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3644 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3645 sizeof(struct il_addsta_cmd));
3646 spin_unlock_irqrestore(&il->sta_lock, flags);
3647
3648 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3649 }
3650
3651 int
3652 il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid)
3653 {
3654 unsigned long flags;
3655 int sta_id;
3656 struct il_addsta_cmd sta_cmd;
3657
3658 lockdep_assert_held(&il->mutex);
3659
3660 sta_id = il_sta_id(sta);
3661 if (sta_id == IL_INVALID_STATION) {
3662 IL_ERR("Invalid station for AGG tid %d\n", tid);
3663 return -ENXIO;
3664 }
3665
3666 spin_lock_irqsave(&il->sta_lock, flags);
3667 il->stations[sta_id].sta.station_flags_msk = 0;
3668 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3669 il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid;
3670 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3671 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3672 sizeof(struct il_addsta_cmd));
3673 spin_unlock_irqrestore(&il->sta_lock, flags);
3674
3675 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3676 }
3677
3678 void
3679 il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt)
3680 {
3681 unsigned long flags;
3682
3683 spin_lock_irqsave(&il->sta_lock, flags);
3684 il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
3685 il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3686 il->stations[sta_id].sta.sta.modify_mask =
3687 STA_MODIFY_SLEEP_TX_COUNT_MSK;
3688 il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
3689 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3690 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3691 spin_unlock_irqrestore(&il->sta_lock, flags);
3692
3693 }
3694
3695 void
3696 il4965_update_chain_flags(struct il_priv *il)
3697 {
3698 if (il->ops->set_rxon_chain) {
3699 il->ops->set_rxon_chain(il);
3700 if (il->active.rx_chain != il->staging.rx_chain)
3701 il_commit_rxon(il);
3702 }
3703 }
3704
3705 static void
3706 il4965_clear_free_frames(struct il_priv *il)
3707 {
3708 struct list_head *element;
3709
3710 D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
3711
3712 while (!list_empty(&il->free_frames)) {
3713 element = il->free_frames.next;
3714 list_del(element);
3715 kfree(list_entry(element, struct il_frame, list));
3716 il->frames_count--;
3717 }
3718
3719 if (il->frames_count) {
3720 IL_WARN("%d frames still in use. Did we lose one?\n",
3721 il->frames_count);
3722 il->frames_count = 0;
3723 }
3724 }
3725
3726 static struct il_frame *
3727 il4965_get_free_frame(struct il_priv *il)
3728 {
3729 struct il_frame *frame;
3730 struct list_head *element;
3731 if (list_empty(&il->free_frames)) {
3732 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
3733 if (!frame) {
3734 IL_ERR("Could not allocate frame!\n");
3735 return NULL;
3736 }
3737
3738 il->frames_count++;
3739 return frame;
3740 }
3741
3742 element = il->free_frames.next;
3743 list_del(element);
3744 return list_entry(element, struct il_frame, list);
3745 }
3746
3747 static void
3748 il4965_free_frame(struct il_priv *il, struct il_frame *frame)
3749 {
3750 memset(frame, 0, sizeof(*frame));
3751 list_add(&frame->list, &il->free_frames);
3752 }
3753
3754 static u32
3755 il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
3756 int left)
3757 {
3758 lockdep_assert_held(&il->mutex);
3759
3760 if (!il->beacon_skb)
3761 return 0;
3762
3763 if (il->beacon_skb->len > left)
3764 return 0;
3765
3766 memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
3767
3768 return il->beacon_skb->len;
3769 }
3770
3771 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
3772 static void
3773 il4965_set_beacon_tim(struct il_priv *il,
3774 struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon,
3775 u32 frame_size)
3776 {
3777 u16 tim_idx;
3778 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
3779
3780 /*
3781 * The idx is relative to frame start but we start looking at the
3782 * variable-length part of the beacon.
3783 */
3784 tim_idx = mgmt->u.beacon.variable - beacon;
3785
3786 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
3787 while ((tim_idx < (frame_size - 2)) &&
3788 (beacon[tim_idx] != WLAN_EID_TIM))
3789 tim_idx += beacon[tim_idx + 1] + 2;
3790
3791 /* If TIM field was found, set variables */
3792 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
3793 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
3794 tx_beacon_cmd->tim_size = beacon[tim_idx + 1];
3795 } else
3796 IL_WARN("Unable to find TIM Element in beacon\n");
3797 }
3798
3799 static unsigned int
3800 il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame)
3801 {
3802 struct il_tx_beacon_cmd *tx_beacon_cmd;
3803 u32 frame_size;
3804 u32 rate_flags;
3805 u32 rate;
3806 /*
3807 * We have to set up the TX command, the TX Beacon command, and the
3808 * beacon contents.
3809 */
3810
3811 lockdep_assert_held(&il->mutex);
3812
3813 if (!il->beacon_enabled) {
3814 IL_ERR("Trying to build beacon without beaconing enabled\n");
3815 return 0;
3816 }
3817
3818 /* Initialize memory */
3819 tx_beacon_cmd = &frame->u.beacon;
3820 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
3821
3822 /* Set up TX beacon contents */
3823 frame_size =
3824 il4965_fill_beacon_frame(il, tx_beacon_cmd->frame,
3825 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
3826 if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
3827 return 0;
3828 if (!frame_size)
3829 return 0;
3830
3831 /* Set up TX command fields */
3832 tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size);
3833 tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id;
3834 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3835 tx_beacon_cmd->tx.tx_flags =
3836 TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK |
3837 TX_CMD_FLG_STA_RATE_MSK;
3838
3839 /* Set up TX beacon command fields */
3840 il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame,
3841 frame_size);
3842
3843 /* Set up packet rate and flags */
3844 rate = il_get_lowest_plcp(il);
3845 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
3846 rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
3847 if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE))
3848 rate_flags |= RATE_MCS_CCK_MSK;
3849 tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags);
3850
3851 return sizeof(*tx_beacon_cmd) + frame_size;
3852 }
3853
3854 int
3855 il4965_send_beacon_cmd(struct il_priv *il)
3856 {
3857 struct il_frame *frame;
3858 unsigned int frame_size;
3859 int rc;
3860
3861 frame = il4965_get_free_frame(il);
3862 if (!frame) {
3863 IL_ERR("Could not obtain free frame buffer for beacon "
3864 "command.\n");
3865 return -ENOMEM;
3866 }
3867
3868 frame_size = il4965_hw_get_beacon_cmd(il, frame);
3869 if (!frame_size) {
3870 IL_ERR("Error configuring the beacon command\n");
3871 il4965_free_frame(il, frame);
3872 return -EINVAL;
3873 }
3874
3875 rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
3876
3877 il4965_free_frame(il, frame);
3878
3879 return rc;
3880 }
3881
3882 static inline dma_addr_t
3883 il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx)
3884 {
3885 struct il_tfd_tb *tb = &tfd->tbs[idx];
3886
3887 dma_addr_t addr = get_unaligned_le32(&tb->lo);
3888 if (sizeof(dma_addr_t) > sizeof(u32))
3889 addr |=
3890 ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) <<
3891 16;
3892
3893 return addr;
3894 }
3895
3896 static inline u16
3897 il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx)
3898 {
3899 struct il_tfd_tb *tb = &tfd->tbs[idx];
3900
3901 return le16_to_cpu(tb->hi_n_len) >> 4;
3902 }
3903
3904 static inline void
3905 il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len)
3906 {
3907 struct il_tfd_tb *tb = &tfd->tbs[idx];
3908 u16 hi_n_len = len << 4;
3909
3910 put_unaligned_le32(addr, &tb->lo);
3911 if (sizeof(dma_addr_t) > sizeof(u32))
3912 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
3913
3914 tb->hi_n_len = cpu_to_le16(hi_n_len);
3915
3916 tfd->num_tbs = idx + 1;
3917 }
3918
3919 static inline u8
3920 il4965_tfd_get_num_tbs(struct il_tfd *tfd)
3921 {
3922 return tfd->num_tbs & 0x1f;
3923 }
3924
3925 /**
3926 * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
3927 * @il - driver ilate data
3928 * @txq - tx queue
3929 *
3930 * Does NOT advance any TFD circular buffer read/write idxes
3931 * Does NOT free the TFD itself (which is within circular buffer)
3932 */
3933 void
3934 il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq)
3935 {
3936 struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds;
3937 struct il_tfd *tfd;
3938 struct pci_dev *dev = il->pci_dev;
3939 int idx = txq->q.read_ptr;
3940 int i;
3941 int num_tbs;
3942
3943 tfd = &tfd_tmp[idx];
3944
3945 /* Sanity check on number of chunks */
3946 num_tbs = il4965_tfd_get_num_tbs(tfd);
3947
3948 if (num_tbs >= IL_NUM_OF_TBS) {
3949 IL_ERR("Too many chunks: %i\n", num_tbs);
3950 /* @todo issue fatal error, it is quite serious situation */
3951 return;
3952 }
3953
3954 /* Unmap tx_cmd */
3955 if (num_tbs)
3956 pci_unmap_single(dev, dma_unmap_addr(&txq->meta[idx], mapping),
3957 dma_unmap_len(&txq->meta[idx], len),
3958 PCI_DMA_BIDIRECTIONAL);
3959
3960 /* Unmap chunks, if any. */
3961 for (i = 1; i < num_tbs; i++)
3962 pci_unmap_single(dev, il4965_tfd_tb_get_addr(tfd, i),
3963 il4965_tfd_tb_get_len(tfd, i),
3964 PCI_DMA_TODEVICE);
3965
3966 /* free SKB */
3967 if (txq->skbs) {
3968 struct sk_buff *skb = txq->skbs[txq->q.read_ptr];
3969
3970 /* can be called from irqs-disabled context */
3971 if (skb) {
3972 dev_kfree_skb_any(skb);
3973 txq->skbs[txq->q.read_ptr] = NULL;
3974 }
3975 }
3976 }
3977
3978 int
3979 il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq,
3980 dma_addr_t addr, u16 len, u8 reset, u8 pad)
3981 {
3982 struct il_queue *q;
3983 struct il_tfd *tfd, *tfd_tmp;
3984 u32 num_tbs;
3985
3986 q = &txq->q;
3987 tfd_tmp = (struct il_tfd *)txq->tfds;
3988 tfd = &tfd_tmp[q->write_ptr];
3989
3990 if (reset)
3991 memset(tfd, 0, sizeof(*tfd));
3992
3993 num_tbs = il4965_tfd_get_num_tbs(tfd);
3994
3995 /* Each TFD can point to a maximum 20 Tx buffers */
3996 if (num_tbs >= IL_NUM_OF_TBS) {
3997 IL_ERR("Error can not send more than %d chunks\n",
3998 IL_NUM_OF_TBS);
3999 return -EINVAL;
4000 }
4001
4002 BUG_ON(addr & ~DMA_BIT_MASK(36));
4003 if (unlikely(addr & ~IL_TX_DMA_MASK))
4004 IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr);
4005
4006 il4965_tfd_set_tb(tfd, num_tbs, addr, len);
4007
4008 return 0;
4009 }
4010
4011 /*
4012 * Tell nic where to find circular buffer of Tx Frame Descriptors for
4013 * given Tx queue, and enable the DMA channel used for that queue.
4014 *
4015 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
4016 * channels supported in hardware.
4017 */
4018 int
4019 il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq)
4020 {
4021 int txq_id = txq->q.id;
4022
4023 /* Circular buffer (TFD queue in DRAM) physical base address */
4024 il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8);
4025
4026 return 0;
4027 }
4028
4029 /******************************************************************************
4030 *
4031 * Generic RX handler implementations
4032 *
4033 ******************************************************************************/
4034 static void
4035 il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
4036 {
4037 struct il_rx_pkt *pkt = rxb_addr(rxb);
4038 struct il_alive_resp *palive;
4039 struct delayed_work *pwork;
4040
4041 palive = &pkt->u.alive_frame;
4042
4043 D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
4044 palive->is_valid, palive->ver_type, palive->ver_subtype);
4045
4046 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
4047 D_INFO("Initialization Alive received.\n");
4048 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
4049 sizeof(struct il_init_alive_resp));
4050 pwork = &il->init_alive_start;
4051 } else {
4052 D_INFO("Runtime Alive received.\n");
4053 memcpy(&il->card_alive, &pkt->u.alive_frame,
4054 sizeof(struct il_alive_resp));
4055 pwork = &il->alive_start;
4056 }
4057
4058 /* We delay the ALIVE response by 5ms to
4059 * give the HW RF Kill time to activate... */
4060 if (palive->is_valid == UCODE_VALID_OK)
4061 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
4062 else
4063 IL_WARN("uCode did not respond OK.\n");
4064 }
4065
4066 /**
4067 * il4965_bg_stats_periodic - Timer callback to queue stats
4068 *
4069 * This callback is provided in order to send a stats request.
4070 *
4071 * This timer function is continually reset to execute within
4072 * 60 seconds since the last N_STATS was received. We need to
4073 * ensure we receive the stats in order to update the temperature
4074 * used for calibrating the TXPOWER.
4075 */
4076 static void
4077 il4965_bg_stats_periodic(struct timer_list *t)
4078 {
4079 struct il_priv *il = from_timer(il, t, stats_periodic);
4080
4081 if (test_bit(S_EXIT_PENDING, &il->status))
4082 return;
4083
4084 /* dont send host command if rf-kill is on */
4085 if (!il_is_ready_rf(il))
4086 return;
4087
4088 il_send_stats_request(il, CMD_ASYNC, false);
4089 }
4090
4091 static void
4092 il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
4093 {
4094 struct il_rx_pkt *pkt = rxb_addr(rxb);
4095 struct il4965_beacon_notif *beacon =
4096 (struct il4965_beacon_notif *)pkt->u.raw;
4097 #ifdef CONFIG_IWLEGACY_DEBUG
4098 u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
4099
4100 D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n",
4101 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
4102 beacon->beacon_notify_hdr.failure_frame,
4103 le32_to_cpu(beacon->ibss_mgr_status),
4104 le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
4105 #endif
4106 il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
4107 }
4108
4109 static void
4110 il4965_perform_ct_kill_task(struct il_priv *il)
4111 {
4112 unsigned long flags;
4113
4114 D_POWER("Stop all queues\n");
4115
4116 if (il->mac80211_registered)
4117 ieee80211_stop_queues(il->hw);
4118
4119 _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4120 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4121 _il_rd(il, CSR_UCODE_DRV_GP1);
4122
4123 spin_lock_irqsave(&il->reg_lock, flags);
4124 if (likely(_il_grab_nic_access(il)))
4125 _il_release_nic_access(il);
4126 spin_unlock_irqrestore(&il->reg_lock, flags);
4127 }
4128
4129 /* Handle notification from uCode that card's power state is changing
4130 * due to software, hardware, or critical temperature RFKILL */
4131 static void
4132 il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
4133 {
4134 struct il_rx_pkt *pkt = rxb_addr(rxb);
4135 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4136 unsigned long status = il->status;
4137
4138 D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n",
4139 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4140 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
4141 (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached");
4142
4143 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) {
4144
4145 _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4146 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4147
4148 il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4149
4150 if (!(flags & RXON_CARD_DISABLED)) {
4151 _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
4152 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4153 il_wr(il, HBUS_TARG_MBX_C,
4154 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4155 }
4156 }
4157
4158 if (flags & CT_CARD_DISABLED)
4159 il4965_perform_ct_kill_task(il);
4160
4161 if (flags & HW_CARD_DISABLED)
4162 set_bit(S_RFKILL, &il->status);
4163 else
4164 clear_bit(S_RFKILL, &il->status);
4165
4166 if (!(flags & RXON_CARD_DISABLED))
4167 il_scan_cancel(il);
4168
4169 if ((test_bit(S_RFKILL, &status) !=
4170 test_bit(S_RFKILL, &il->status)))
4171 wiphy_rfkill_set_hw_state(il->hw->wiphy,
4172 test_bit(S_RFKILL, &il->status));
4173 else
4174 wake_up(&il->wait_command_queue);
4175 }
4176
4177 /**
4178 * il4965_setup_handlers - Initialize Rx handler callbacks
4179 *
4180 * Setup the RX handlers for each of the reply types sent from the uCode
4181 * to the host.
4182 *
4183 * This function chains into the hardware specific files for them to setup
4184 * any hardware specific handlers as well.
4185 */
4186 static void
4187 il4965_setup_handlers(struct il_priv *il)
4188 {
4189 il->handlers[N_ALIVE] = il4965_hdl_alive;
4190 il->handlers[N_ERROR] = il_hdl_error;
4191 il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
4192 il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
4193 il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
4194 il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
4195 il->handlers[N_BEACON] = il4965_hdl_beacon;
4196
4197 /*
4198 * The same handler is used for both the REPLY to a discrete
4199 * stats request from the host as well as for the periodic
4200 * stats notifications (after received beacons) from the uCode.
4201 */
4202 il->handlers[C_STATS] = il4965_hdl_c_stats;
4203 il->handlers[N_STATS] = il4965_hdl_stats;
4204
4205 il_setup_rx_scan_handlers(il);
4206
4207 /* status change handler */
4208 il->handlers[N_CARD_STATE] = il4965_hdl_card_state;
4209
4210 il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon;
4211 /* Rx handlers */
4212 il->handlers[N_RX_PHY] = il4965_hdl_rx_phy;
4213 il->handlers[N_RX_MPDU] = il4965_hdl_rx;
4214 il->handlers[N_RX] = il4965_hdl_rx;
4215 /* block ack */
4216 il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba;
4217 /* Tx response */
4218 il->handlers[C_TX] = il4965_hdl_tx;
4219 }
4220
4221 /**
4222 * il4965_rx_handle - Main entry function for receiving responses from uCode
4223 *
4224 * Uses the il->handlers callback function array to invoke
4225 * the appropriate handlers, including command responses,
4226 * frame-received notifications, and other notifications.
4227 */
4228 void
4229 il4965_rx_handle(struct il_priv *il)
4230 {
4231 struct il_rx_buf *rxb;
4232 struct il_rx_pkt *pkt;
4233 struct il_rx_queue *rxq = &il->rxq;
4234 u32 r, i;
4235 int reclaim;
4236 unsigned long flags;
4237 u8 fill_rx = 0;
4238 u32 count = 8;
4239 int total_empty;
4240
4241 /* uCode's read idx (stored in shared DRAM) indicates the last Rx
4242 * buffer that the driver may process (last buffer filled by ucode). */
4243 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
4244 i = rxq->read;
4245
4246 /* Rx interrupt, but nothing sent from uCode */
4247 if (i == r)
4248 D_RX("r = %d, i = %d\n", r, i);
4249
4250 /* calculate total frames need to be restock after handling RX */
4251 total_empty = r - rxq->write_actual;
4252 if (total_empty < 0)
4253 total_empty += RX_QUEUE_SIZE;
4254
4255 if (total_empty > (RX_QUEUE_SIZE / 2))
4256 fill_rx = 1;
4257
4258 while (i != r) {
4259 int len;
4260
4261 rxb = rxq->queue[i];
4262
4263 /* If an RXB doesn't have a Rx queue slot associated with it,
4264 * then a bug has been introduced in the queue refilling
4265 * routines -- catch it here */
4266 BUG_ON(rxb == NULL);
4267
4268 rxq->queue[i] = NULL;
4269
4270 pci_unmap_page(il->pci_dev, rxb->page_dma,
4271 PAGE_SIZE << il->hw_params.rx_page_order,
4272 PCI_DMA_FROMDEVICE);
4273 pkt = rxb_addr(rxb);
4274
4275 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4276 len += sizeof(u32); /* account for status word */
4277
4278 reclaim = il_need_reclaim(il, pkt);
4279
4280 /* Based on type of command response or notification,
4281 * handle those that need handling via function in
4282 * handlers table. See il4965_setup_handlers() */
4283 if (il->handlers[pkt->hdr.cmd]) {
4284 D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
4285 il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4286 il->isr_stats.handlers[pkt->hdr.cmd]++;
4287 il->handlers[pkt->hdr.cmd] (il, rxb);
4288 } else {
4289 /* No handling needed */
4290 D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
4291 i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4292 }
4293
4294 /*
4295 * XXX: After here, we should always check rxb->page
4296 * against NULL before touching it or its virtual
4297 * memory (pkt). Because some handler might have
4298 * already taken or freed the pages.
4299 */
4300
4301 if (reclaim) {
4302 /* Invoke any callbacks, transfer the buffer to caller,
4303 * and fire off the (possibly) blocking il_send_cmd()
4304 * as we reclaim the driver command queue */
4305 if (rxb->page)
4306 il_tx_cmd_complete(il, rxb);
4307 else
4308 IL_WARN("Claim null rxb?\n");
4309 }
4310
4311 /* Reuse the page if possible. For notification packets and
4312 * SKBs that fail to Rx correctly, add them back into the
4313 * rx_free list for reuse later. */
4314 spin_lock_irqsave(&rxq->lock, flags);
4315 if (rxb->page != NULL) {
4316 rxb->page_dma =
4317 pci_map_page(il->pci_dev, rxb->page, 0,
4318 PAGE_SIZE << il->hw_params.
4319 rx_page_order, PCI_DMA_FROMDEVICE);
4320
4321 if (unlikely(pci_dma_mapping_error(il->pci_dev,
4322 rxb->page_dma))) {
4323 __il_free_pages(il, rxb->page);
4324 rxb->page = NULL;
4325 list_add_tail(&rxb->list, &rxq->rx_used);
4326 } else {
4327 list_add_tail(&rxb->list, &rxq->rx_free);
4328 rxq->free_count++;
4329 }
4330 } else
4331 list_add_tail(&rxb->list, &rxq->rx_used);
4332
4333 spin_unlock_irqrestore(&rxq->lock, flags);
4334
4335 i = (i + 1) & RX_QUEUE_MASK;
4336 /* If there are a lot of unused frames,
4337 * restock the Rx queue so ucode wont assert. */
4338 if (fill_rx) {
4339 count++;
4340 if (count >= 8) {
4341 rxq->read = i;
4342 il4965_rx_replenish_now(il);
4343 count = 0;
4344 }
4345 }
4346 }
4347
4348 /* Backtrack one entry */
4349 rxq->read = i;
4350 if (fill_rx)
4351 il4965_rx_replenish_now(il);
4352 else
4353 il4965_rx_queue_restock(il);
4354 }
4355
4356 /* call this function to flush any scheduled tasklet */
4357 static inline void
4358 il4965_synchronize_irq(struct il_priv *il)
4359 {
4360 /* wait to make sure we flush pending tasklet */
4361 synchronize_irq(il->pci_dev->irq);
4362 tasklet_kill(&il->irq_tasklet);
4363 }
4364
4365 static void
4366 il4965_irq_tasklet(struct il_priv *il)
4367 {
4368 u32 inta, handled = 0;
4369 u32 inta_fh;
4370 unsigned long flags;
4371 u32 i;
4372 #ifdef CONFIG_IWLEGACY_DEBUG
4373 u32 inta_mask;
4374 #endif
4375
4376 spin_lock_irqsave(&il->lock, flags);
4377
4378 /* Ack/clear/reset pending uCode interrupts.
4379 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4380 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4381 inta = _il_rd(il, CSR_INT);
4382 _il_wr(il, CSR_INT, inta);
4383
4384 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4385 * Any new interrupts that happen after this, either while we're
4386 * in this tasklet, or later, will show up in next ISR/tasklet. */
4387 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4388 _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
4389
4390 #ifdef CONFIG_IWLEGACY_DEBUG
4391 if (il_get_debug_level(il) & IL_DL_ISR) {
4392 /* just for debug */
4393 inta_mask = _il_rd(il, CSR_INT_MASK);
4394 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
4395 inta_mask, inta_fh);
4396 }
4397 #endif
4398
4399 spin_unlock_irqrestore(&il->lock, flags);
4400
4401 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4402 * atomic, make sure that inta covers all the interrupts that
4403 * we've discovered, even if FH interrupt came in just after
4404 * reading CSR_INT. */
4405 if (inta_fh & CSR49_FH_INT_RX_MASK)
4406 inta |= CSR_INT_BIT_FH_RX;
4407 if (inta_fh & CSR49_FH_INT_TX_MASK)
4408 inta |= CSR_INT_BIT_FH_TX;
4409
4410 /* Now service all interrupt bits discovered above. */
4411 if (inta & CSR_INT_BIT_HW_ERR) {
4412 IL_ERR("Hardware error detected. Restarting.\n");
4413
4414 /* Tell the device to stop sending interrupts */
4415 il_disable_interrupts(il);
4416
4417 il->isr_stats.hw++;
4418 il_irq_handle_error(il);
4419
4420 handled |= CSR_INT_BIT_HW_ERR;
4421
4422 return;
4423 }
4424 #ifdef CONFIG_IWLEGACY_DEBUG
4425 if (il_get_debug_level(il) & (IL_DL_ISR)) {
4426 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4427 if (inta & CSR_INT_BIT_SCD) {
4428 D_ISR("Scheduler finished to transmit "
4429 "the frame/frames.\n");
4430 il->isr_stats.sch++;
4431 }
4432
4433 /* Alive notification via Rx interrupt will do the real work */
4434 if (inta & CSR_INT_BIT_ALIVE) {
4435 D_ISR("Alive interrupt\n");
4436 il->isr_stats.alive++;
4437 }
4438 }
4439 #endif
4440 /* Safely ignore these bits for debug checks below */
4441 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4442
4443 /* HW RF KILL switch toggled */
4444 if (inta & CSR_INT_BIT_RF_KILL) {
4445 int hw_rf_kill = 0;
4446
4447 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4448 hw_rf_kill = 1;
4449
4450 IL_WARN("RF_KILL bit toggled to %s.\n",
4451 hw_rf_kill ? "disable radio" : "enable radio");
4452
4453 il->isr_stats.rfkill++;
4454
4455 /* driver only loads ucode once setting the interface up.
4456 * the driver allows loading the ucode even if the radio
4457 * is killed. Hence update the killswitch state here. The
4458 * rfkill handler will care about restarting if needed.
4459 */
4460 if (hw_rf_kill) {
4461 set_bit(S_RFKILL, &il->status);
4462 } else {
4463 clear_bit(S_RFKILL, &il->status);
4464 il_force_reset(il, true);
4465 }
4466 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill);
4467
4468 handled |= CSR_INT_BIT_RF_KILL;
4469 }
4470
4471 /* Chip got too hot and stopped itself */
4472 if (inta & CSR_INT_BIT_CT_KILL) {
4473 IL_ERR("Microcode CT kill error detected.\n");
4474 il->isr_stats.ctkill++;
4475 handled |= CSR_INT_BIT_CT_KILL;
4476 }
4477
4478 /* Error detected by uCode */
4479 if (inta & CSR_INT_BIT_SW_ERR) {
4480 IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n",
4481 inta);
4482 il->isr_stats.sw++;
4483 il_irq_handle_error(il);
4484 handled |= CSR_INT_BIT_SW_ERR;
4485 }
4486
4487 /*
4488 * uCode wakes up after power-down sleep.
4489 * Tell device about any new tx or host commands enqueued,
4490 * and about any Rx buffers made available while asleep.
4491 */
4492 if (inta & CSR_INT_BIT_WAKEUP) {
4493 D_ISR("Wakeup interrupt\n");
4494 il_rx_queue_update_write_ptr(il, &il->rxq);
4495 for (i = 0; i < il->hw_params.max_txq_num; i++)
4496 il_txq_update_write_ptr(il, &il->txq[i]);
4497 il->isr_stats.wakeup++;
4498 handled |= CSR_INT_BIT_WAKEUP;
4499 }
4500
4501 /* All uCode command responses, including Tx command responses,
4502 * Rx "responses" (frame-received notification), and other
4503 * notifications from uCode come through here*/
4504 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4505 il4965_rx_handle(il);
4506 il->isr_stats.rx++;
4507 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4508 }
4509
4510 /* This "Tx" DMA channel is used only for loading uCode */
4511 if (inta & CSR_INT_BIT_FH_TX) {
4512 D_ISR("uCode load interrupt\n");
4513 il->isr_stats.tx++;
4514 handled |= CSR_INT_BIT_FH_TX;
4515 /* Wake up uCode load routine, now that load is complete */
4516 il->ucode_write_complete = 1;
4517 wake_up(&il->wait_command_queue);
4518 }
4519
4520 if (inta & ~handled) {
4521 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4522 il->isr_stats.unhandled++;
4523 }
4524
4525 if (inta & ~(il->inta_mask)) {
4526 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
4527 inta & ~il->inta_mask);
4528 IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh);
4529 }
4530
4531 /* Re-enable all interrupts */
4532 /* only Re-enable if disabled by irq */
4533 if (test_bit(S_INT_ENABLED, &il->status))
4534 il_enable_interrupts(il);
4535 /* Re-enable RF_KILL if it occurred */
4536 else if (handled & CSR_INT_BIT_RF_KILL)
4537 il_enable_rfkill_int(il);
4538
4539 #ifdef CONFIG_IWLEGACY_DEBUG
4540 if (il_get_debug_level(il) & (IL_DL_ISR)) {
4541 inta = _il_rd(il, CSR_INT);
4542 inta_mask = _il_rd(il, CSR_INT_MASK);
4543 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4544 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4545 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4546 }
4547 #endif
4548 }
4549
4550 /*****************************************************************************
4551 *
4552 * sysfs attributes
4553 *
4554 *****************************************************************************/
4555
4556 #ifdef CONFIG_IWLEGACY_DEBUG
4557
4558 /*
4559 * The following adds a new attribute to the sysfs representation
4560 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
4561 * used for controlling the debug level.
4562 *
4563 * See the level definitions in iwl for details.
4564 *
4565 * The debug_level being managed using sysfs below is a per device debug
4566 * level that is used instead of the global debug level if it (the per
4567 * device debug level) is set.
4568 */
4569 static ssize_t
4570 il4965_show_debug_level(struct device *d, struct device_attribute *attr,
4571 char *buf)
4572 {
4573 struct il_priv *il = dev_get_drvdata(d);
4574 return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
4575 }
4576
4577 static ssize_t
4578 il4965_store_debug_level(struct device *d, struct device_attribute *attr,
4579 const char *buf, size_t count)
4580 {
4581 struct il_priv *il = dev_get_drvdata(d);
4582 unsigned long val;
4583 int ret;
4584
4585 ret = kstrtoul(buf, 0, &val);
4586 if (ret)
4587 IL_ERR("%s is not in hex or decimal form.\n", buf);
4588 else
4589 il->debug_level = val;
4590
4591 return strnlen(buf, count);
4592 }
4593
4594 static DEVICE_ATTR(debug_level, 0644, il4965_show_debug_level,
4595 il4965_store_debug_level);
4596
4597 #endif /* CONFIG_IWLEGACY_DEBUG */
4598
4599 static ssize_t
4600 il4965_show_temperature(struct device *d, struct device_attribute *attr,
4601 char *buf)
4602 {
4603 struct il_priv *il = dev_get_drvdata(d);
4604
4605 if (!il_is_alive(il))
4606 return -EAGAIN;
4607
4608 return sprintf(buf, "%d\n", il->temperature);
4609 }
4610
4611 static DEVICE_ATTR(temperature, 0444, il4965_show_temperature, NULL);
4612
4613 static ssize_t
4614 il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
4615 {
4616 struct il_priv *il = dev_get_drvdata(d);
4617
4618 if (!il_is_ready_rf(il))
4619 return sprintf(buf, "off\n");
4620 else
4621 return sprintf(buf, "%d\n", il->tx_power_user_lmt);
4622 }
4623
4624 static ssize_t
4625 il4965_store_tx_power(struct device *d, struct device_attribute *attr,
4626 const char *buf, size_t count)
4627 {
4628 struct il_priv *il = dev_get_drvdata(d);
4629 unsigned long val;
4630 int ret;
4631
4632 ret = kstrtoul(buf, 10, &val);
4633 if (ret)
4634 IL_INFO("%s is not in decimal form.\n", buf);
4635 else {
4636 ret = il_set_tx_power(il, val, false);
4637 if (ret)
4638 IL_ERR("failed setting tx power (0x%08x).\n", ret);
4639 else
4640 ret = count;
4641 }
4642 return ret;
4643 }
4644
4645 static DEVICE_ATTR(tx_power, 0644, il4965_show_tx_power,
4646 il4965_store_tx_power);
4647
4648 static struct attribute *il_sysfs_entries[] = {
4649 &dev_attr_temperature.attr,
4650 &dev_attr_tx_power.attr,
4651 #ifdef CONFIG_IWLEGACY_DEBUG
4652 &dev_attr_debug_level.attr,
4653 #endif
4654 NULL
4655 };
4656
4657 static const struct attribute_group il_attribute_group = {
4658 .name = NULL, /* put in device directory */
4659 .attrs = il_sysfs_entries,
4660 };
4661
4662 /******************************************************************************
4663 *
4664 * uCode download functions
4665 *
4666 ******************************************************************************/
4667
4668 static void
4669 il4965_dealloc_ucode_pci(struct il_priv *il)
4670 {
4671 il_free_fw_desc(il->pci_dev, &il->ucode_code);
4672 il_free_fw_desc(il->pci_dev, &il->ucode_data);
4673 il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
4674 il_free_fw_desc(il->pci_dev, &il->ucode_init);
4675 il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
4676 il_free_fw_desc(il->pci_dev, &il->ucode_boot);
4677 }
4678
4679 static void
4680 il4965_nic_start(struct il_priv *il)
4681 {
4682 /* Remove all resets to allow NIC to operate */
4683 _il_wr(il, CSR_RESET, 0);
4684 }
4685
4686 static void il4965_ucode_callback(const struct firmware *ucode_raw,
4687 void *context);
4688 static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length);
4689
4690 static int __must_check
4691 il4965_request_firmware(struct il_priv *il, bool first)
4692 {
4693 const char *name_pre = il->cfg->fw_name_pre;
4694 char tag[8];
4695
4696 if (first) {
4697 il->fw_idx = il->cfg->ucode_api_max;
4698 sprintf(tag, "%d", il->fw_idx);
4699 } else {
4700 il->fw_idx--;
4701 sprintf(tag, "%d", il->fw_idx);
4702 }
4703
4704 if (il->fw_idx < il->cfg->ucode_api_min) {
4705 IL_ERR("no suitable firmware found!\n");
4706 return -ENOENT;
4707 }
4708
4709 sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
4710
4711 D_INFO("attempting to load firmware '%s'\n", il->firmware_name);
4712
4713 return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name,
4714 &il->pci_dev->dev, GFP_KERNEL, il,
4715 il4965_ucode_callback);
4716 }
4717
4718 struct il4965_firmware_pieces {
4719 const void *inst, *data, *init, *init_data, *boot;
4720 size_t inst_size, data_size, init_size, init_data_size, boot_size;
4721 };
4722
4723 static int
4724 il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw,
4725 struct il4965_firmware_pieces *pieces)
4726 {
4727 struct il_ucode_header *ucode = (void *)ucode_raw->data;
4728 u32 api_ver, hdr_size;
4729 const u8 *src;
4730
4731 il->ucode_ver = le32_to_cpu(ucode->ver);
4732 api_ver = IL_UCODE_API(il->ucode_ver);
4733
4734 switch (api_ver) {
4735 default:
4736 case 0:
4737 case 1:
4738 case 2:
4739 hdr_size = 24;
4740 if (ucode_raw->size < hdr_size) {
4741 IL_ERR("File size too small!\n");
4742 return -EINVAL;
4743 }
4744 pieces->inst_size = le32_to_cpu(ucode->v1.inst_size);
4745 pieces->data_size = le32_to_cpu(ucode->v1.data_size);
4746 pieces->init_size = le32_to_cpu(ucode->v1.init_size);
4747 pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size);
4748 pieces->boot_size = le32_to_cpu(ucode->v1.boot_size);
4749 src = ucode->v1.data;
4750 break;
4751 }
4752
4753 /* Verify size of file vs. image size info in file's header */
4754 if (ucode_raw->size !=
4755 hdr_size + pieces->inst_size + pieces->data_size +
4756 pieces->init_size + pieces->init_data_size + pieces->boot_size) {
4757
4758 IL_ERR("uCode file size %d does not match expected size\n",
4759 (int)ucode_raw->size);
4760 return -EINVAL;
4761 }
4762
4763 pieces->inst = src;
4764 src += pieces->inst_size;
4765 pieces->data = src;
4766 src += pieces->data_size;
4767 pieces->init = src;
4768 src += pieces->init_size;
4769 pieces->init_data = src;
4770 src += pieces->init_data_size;
4771 pieces->boot = src;
4772 src += pieces->boot_size;
4773
4774 return 0;
4775 }
4776
4777 /**
4778 * il4965_ucode_callback - callback when firmware was loaded
4779 *
4780 * If loaded successfully, copies the firmware into buffers
4781 * for the card to fetch (via DMA).
4782 */
4783 static void
4784 il4965_ucode_callback(const struct firmware *ucode_raw, void *context)
4785 {
4786 struct il_priv *il = context;
4787 struct il_ucode_header *ucode;
4788 int err;
4789 struct il4965_firmware_pieces pieces;
4790 const unsigned int api_max = il->cfg->ucode_api_max;
4791 const unsigned int api_min = il->cfg->ucode_api_min;
4792 u32 api_ver;
4793
4794 u32 max_probe_length = 200;
4795 u32 standard_phy_calibration_size =
4796 IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE;
4797
4798 memset(&pieces, 0, sizeof(pieces));
4799
4800 if (!ucode_raw) {
4801 if (il->fw_idx <= il->cfg->ucode_api_max)
4802 IL_ERR("request for firmware file '%s' failed.\n",
4803 il->firmware_name);
4804 goto try_again;
4805 }
4806
4807 D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name,
4808 ucode_raw->size);
4809
4810 /* Make sure that we got at least the API version number */
4811 if (ucode_raw->size < 4) {
4812 IL_ERR("File size way too small!\n");
4813 goto try_again;
4814 }
4815
4816 /* Data from ucode file: header followed by uCode images */
4817 ucode = (struct il_ucode_header *)ucode_raw->data;
4818
4819 err = il4965_load_firmware(il, ucode_raw, &pieces);
4820
4821 if (err)
4822 goto try_again;
4823
4824 api_ver = IL_UCODE_API(il->ucode_ver);
4825
4826 /*
4827 * api_ver should match the api version forming part of the
4828 * firmware filename ... but we don't check for that and only rely
4829 * on the API version read from firmware header from here on forward
4830 */
4831 if (api_ver < api_min || api_ver > api_max) {
4832 IL_ERR("Driver unable to support your firmware API. "
4833 "Driver supports v%u, firmware is v%u.\n", api_max,
4834 api_ver);
4835 goto try_again;
4836 }
4837
4838 if (api_ver != api_max)
4839 IL_ERR("Firmware has old API version. Expected v%u, "
4840 "got v%u. New firmware can be obtained "
4841 "from http://www.intellinuxwireless.org.\n", api_max,
4842 api_ver);
4843
4844 IL_INFO("loaded firmware version %u.%u.%u.%u\n",
4845 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
4846 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
4847
4848 snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
4849 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
4850 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
4851 IL_UCODE_SERIAL(il->ucode_ver));
4852
4853 /*
4854 * For any of the failures below (before allocating pci memory)
4855 * we will try to load a version with a smaller API -- maybe the
4856 * user just got a corrupted version of the latest API.
4857 */
4858
4859 D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
4860 D_INFO("f/w package hdr runtime inst size = %zd\n", pieces.inst_size);
4861 D_INFO("f/w package hdr runtime data size = %zd\n", pieces.data_size);
4862 D_INFO("f/w package hdr init inst size = %zd\n", pieces.init_size);
4863 D_INFO("f/w package hdr init data size = %zd\n", pieces.init_data_size);
4864 D_INFO("f/w package hdr boot inst size = %zd\n", pieces.boot_size);
4865
4866 /* Verify that uCode images will fit in card's SRAM */
4867 if (pieces.inst_size > il->hw_params.max_inst_size) {
4868 IL_ERR("uCode instr len %zd too large to fit in\n",
4869 pieces.inst_size);
4870 goto try_again;
4871 }
4872
4873 if (pieces.data_size > il->hw_params.max_data_size) {
4874 IL_ERR("uCode data len %zd too large to fit in\n",
4875 pieces.data_size);
4876 goto try_again;
4877 }
4878
4879 if (pieces.init_size > il->hw_params.max_inst_size) {
4880 IL_ERR("uCode init instr len %zd too large to fit in\n",
4881 pieces.init_size);
4882 goto try_again;
4883 }
4884
4885 if (pieces.init_data_size > il->hw_params.max_data_size) {
4886 IL_ERR("uCode init data len %zd too large to fit in\n",
4887 pieces.init_data_size);
4888 goto try_again;
4889 }
4890
4891 if (pieces.boot_size > il->hw_params.max_bsm_size) {
4892 IL_ERR("uCode boot instr len %zd too large to fit in\n",
4893 pieces.boot_size);
4894 goto try_again;
4895 }
4896
4897 /* Allocate ucode buffers for card's bus-master loading ... */
4898
4899 /* Runtime instructions and 2 copies of data:
4900 * 1) unmodified from disk
4901 * 2) backup cache for save/restore during power-downs */
4902 il->ucode_code.len = pieces.inst_size;
4903 il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
4904
4905 il->ucode_data.len = pieces.data_size;
4906 il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
4907
4908 il->ucode_data_backup.len = pieces.data_size;
4909 il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
4910
4911 if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
4912 !il->ucode_data_backup.v_addr)
4913 goto err_pci_alloc;
4914
4915 /* Initialization instructions and data */
4916 if (pieces.init_size && pieces.init_data_size) {
4917 il->ucode_init.len = pieces.init_size;
4918 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
4919
4920 il->ucode_init_data.len = pieces.init_data_size;
4921 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
4922
4923 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
4924 goto err_pci_alloc;
4925 }
4926
4927 /* Bootstrap (instructions only, no data) */
4928 if (pieces.boot_size) {
4929 il->ucode_boot.len = pieces.boot_size;
4930 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
4931
4932 if (!il->ucode_boot.v_addr)
4933 goto err_pci_alloc;
4934 }
4935
4936 /* Now that we can no longer fail, copy information */
4937
4938 il->sta_key_max_num = STA_KEY_MAX_NUM;
4939
4940 /* Copy images into buffers for card's bus-master reads ... */
4941
4942 /* Runtime instructions (first block of data in file) */
4943 D_INFO("Copying (but not loading) uCode instr len %zd\n",
4944 pieces.inst_size);
4945 memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size);
4946
4947 D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4948 il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
4949
4950 /*
4951 * Runtime data
4952 * NOTE: Copy into backup buffer will be done in il_up()
4953 */
4954 D_INFO("Copying (but not loading) uCode data len %zd\n",
4955 pieces.data_size);
4956 memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size);
4957 memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size);
4958
4959 /* Initialization instructions */
4960 if (pieces.init_size) {
4961 D_INFO("Copying (but not loading) init instr len %zd\n",
4962 pieces.init_size);
4963 memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size);
4964 }
4965
4966 /* Initialization data */
4967 if (pieces.init_data_size) {
4968 D_INFO("Copying (but not loading) init data len %zd\n",
4969 pieces.init_data_size);
4970 memcpy(il->ucode_init_data.v_addr, pieces.init_data,
4971 pieces.init_data_size);
4972 }
4973
4974 /* Bootstrap instructions */
4975 D_INFO("Copying (but not loading) boot instr len %zd\n",
4976 pieces.boot_size);
4977 memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size);
4978
4979 /*
4980 * figure out the offset of chain noise reset and gain commands
4981 * base on the size of standard phy calibration commands table size
4982 */
4983 il->_4965.phy_calib_chain_noise_reset_cmd =
4984 standard_phy_calibration_size;
4985 il->_4965.phy_calib_chain_noise_gain_cmd =
4986 standard_phy_calibration_size + 1;
4987
4988 /**************************************************
4989 * This is still part of probe() in a sense...
4990 *
4991 * 9. Setup and register with mac80211 and debugfs
4992 **************************************************/
4993 err = il4965_mac_setup_register(il, max_probe_length);
4994 if (err)
4995 goto out_unbind;
4996
4997 err = il_dbgfs_register(il, DRV_NAME);
4998 if (err)
4999 IL_ERR("failed to create debugfs files. Ignoring error: %d\n",
5000 err);
5001
5002 err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group);
5003 if (err) {
5004 IL_ERR("failed to create sysfs device attributes\n");
5005 goto out_unbind;
5006 }
5007
5008 /* We have our copies now, allow OS release its copies */
5009 release_firmware(ucode_raw);
5010 complete(&il->_4965.firmware_loading_complete);
5011 return;
5012
5013 try_again:
5014 /* try next, if any */
5015 if (il4965_request_firmware(il, false))
5016 goto out_unbind;
5017 release_firmware(ucode_raw);
5018 return;
5019
5020 err_pci_alloc:
5021 IL_ERR("failed to allocate pci memory\n");
5022 il4965_dealloc_ucode_pci(il);
5023 out_unbind:
5024 complete(&il->_4965.firmware_loading_complete);
5025 device_release_driver(&il->pci_dev->dev);
5026 release_firmware(ucode_raw);
5027 }
5028
5029 static const char *const desc_lookup_text[] = {
5030 "OK",
5031 "FAIL",
5032 "BAD_PARAM",
5033 "BAD_CHECKSUM",
5034 "NMI_INTERRUPT_WDG",
5035 "SYSASSERT",
5036 "FATAL_ERROR",
5037 "BAD_COMMAND",
5038 "HW_ERROR_TUNE_LOCK",
5039 "HW_ERROR_TEMPERATURE",
5040 "ILLEGAL_CHAN_FREQ",
5041 "VCC_NOT_STBL",
5042 "FH49_ERROR",
5043 "NMI_INTERRUPT_HOST",
5044 "NMI_INTERRUPT_ACTION_PT",
5045 "NMI_INTERRUPT_UNKNOWN",
5046 "UCODE_VERSION_MISMATCH",
5047 "HW_ERROR_ABS_LOCK",
5048 "HW_ERROR_CAL_LOCK_FAIL",
5049 "NMI_INTERRUPT_INST_ACTION_PT",
5050 "NMI_INTERRUPT_DATA_ACTION_PT",
5051 "NMI_TRM_HW_ER",
5052 "NMI_INTERRUPT_TRM",
5053 "NMI_INTERRUPT_BREAK_POINT",
5054 "DEBUG_0",
5055 "DEBUG_1",
5056 "DEBUG_2",
5057 "DEBUG_3",
5058 };
5059
5060 static struct {
5061 char *name;
5062 u8 num;
5063 } advanced_lookup[] = {
5064 {
5065 "NMI_INTERRUPT_WDG", 0x34}, {
5066 "SYSASSERT", 0x35}, {
5067 "UCODE_VERSION_MISMATCH", 0x37}, {
5068 "BAD_COMMAND", 0x38}, {
5069 "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, {
5070 "FATAL_ERROR", 0x3D}, {
5071 "NMI_TRM_HW_ERR", 0x46}, {
5072 "NMI_INTERRUPT_TRM", 0x4C}, {
5073 "NMI_INTERRUPT_BREAK_POINT", 0x54}, {
5074 "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, {
5075 "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, {
5076 "NMI_INTERRUPT_HOST", 0x66}, {
5077 "NMI_INTERRUPT_ACTION_PT", 0x7C}, {
5078 "NMI_INTERRUPT_UNKNOWN", 0x84}, {
5079 "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, {
5080 "ADVANCED_SYSASSERT", 0},};
5081
5082 static const char *
5083 il4965_desc_lookup(u32 num)
5084 {
5085 int i;
5086 int max = ARRAY_SIZE(desc_lookup_text);
5087
5088 if (num < max)
5089 return desc_lookup_text[num];
5090
5091 max = ARRAY_SIZE(advanced_lookup) - 1;
5092 for (i = 0; i < max; i++) {
5093 if (advanced_lookup[i].num == num)
5094 break;
5095 }
5096 return advanced_lookup[i].name;
5097 }
5098
5099 #define ERROR_START_OFFSET (1 * sizeof(u32))
5100 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
5101
5102 void
5103 il4965_dump_nic_error_log(struct il_priv *il)
5104 {
5105 u32 data2, line;
5106 u32 desc, time, count, base, data1;
5107 u32 blink1, blink2, ilink1, ilink2;
5108 u32 pc, hcmd;
5109
5110 if (il->ucode_type == UCODE_INIT)
5111 base = le32_to_cpu(il->card_alive_init.error_event_table_ptr);
5112 else
5113 base = le32_to_cpu(il->card_alive.error_event_table_ptr);
5114
5115 if (!il->ops->is_valid_rtc_data_addr(base)) {
5116 IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n",
5117 base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT");
5118 return;
5119 }
5120
5121 count = il_read_targ_mem(il, base);
5122
5123 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
5124 IL_ERR("Start IWL Error Log Dump:\n");
5125 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
5126 }
5127
5128 desc = il_read_targ_mem(il, base + 1 * sizeof(u32));
5129 il->isr_stats.err_code = desc;
5130 pc = il_read_targ_mem(il, base + 2 * sizeof(u32));
5131 blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32));
5132 blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32));
5133 ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32));
5134 ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32));
5135 data1 = il_read_targ_mem(il, base + 7 * sizeof(u32));
5136 data2 = il_read_targ_mem(il, base + 8 * sizeof(u32));
5137 line = il_read_targ_mem(il, base + 9 * sizeof(u32));
5138 time = il_read_targ_mem(il, base + 11 * sizeof(u32));
5139 hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32));
5140
5141 IL_ERR("Desc Time "
5142 "data1 data2 line\n");
5143 IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n",
5144 il4965_desc_lookup(desc), desc, time, data1, data2, line);
5145 IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n");
5146 IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1,
5147 blink2, ilink1, ilink2, hcmd);
5148 }
5149
5150 static void
5151 il4965_rf_kill_ct_config(struct il_priv *il)
5152 {
5153 struct il_ct_kill_config cmd;
5154 unsigned long flags;
5155 int ret = 0;
5156
5157 spin_lock_irqsave(&il->lock, flags);
5158 _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
5159 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
5160 spin_unlock_irqrestore(&il->lock, flags);
5161
5162 cmd.critical_temperature_R =
5163 cpu_to_le32(il->hw_params.ct_kill_threshold);
5164
5165 ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd);
5166 if (ret)
5167 IL_ERR("C_CT_KILL_CONFIG failed\n");
5168 else
5169 D_INFO("C_CT_KILL_CONFIG " "succeeded, "
5170 "critical temperature is %d\n",
5171 il->hw_params.ct_kill_threshold);
5172 }
5173
5174 static const s8 default_queue_to_tx_fifo[] = {
5175 IL_TX_FIFO_VO,
5176 IL_TX_FIFO_VI,
5177 IL_TX_FIFO_BE,
5178 IL_TX_FIFO_BK,
5179 IL49_CMD_FIFO_NUM,
5180 IL_TX_FIFO_UNUSED,
5181 IL_TX_FIFO_UNUSED,
5182 };
5183
5184 #define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
5185
5186 static int
5187 il4965_alive_notify(struct il_priv *il)
5188 {
5189 u32 a;
5190 unsigned long flags;
5191 int i, chan;
5192 u32 reg_val;
5193
5194 spin_lock_irqsave(&il->lock, flags);
5195
5196 /* Clear 4965's internal Tx Scheduler data base */
5197 il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR);
5198 a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET;
5199 for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
5200 il_write_targ_mem(il, a, 0);
5201 for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
5202 il_write_targ_mem(il, a, 0);
5203 for (;
5204 a <
5205 il->scd_base_addr +
5206 IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num);
5207 a += 4)
5208 il_write_targ_mem(il, a, 0);
5209
5210 /* Tel 4965 where to find Tx byte count tables */
5211 il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10);
5212
5213 /* Enable DMA channel */
5214 for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++)
5215 il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan),
5216 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
5217 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
5218
5219 /* Update FH chicken bits */
5220 reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG);
5221 il_wr(il, FH49_TX_CHICKEN_BITS_REG,
5222 reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
5223
5224 /* Disable chain mode for all queues */
5225 il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0);
5226
5227 /* Initialize each Tx queue (including the command queue) */
5228 for (i = 0; i < il->hw_params.max_txq_num; i++) {
5229
5230 /* TFD circular buffer read/write idxes */
5231 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0);
5232 il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8));
5233
5234 /* Max Tx Window size for Scheduler-ACK mode */
5235 il_write_targ_mem(il,
5236 il->scd_base_addr +
5237 IL49_SCD_CONTEXT_QUEUE_OFFSET(i),
5238 (SCD_WIN_SIZE <<
5239 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
5240 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
5241
5242 /* Frame limit */
5243 il_write_targ_mem(il,
5244 il->scd_base_addr +
5245 IL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
5246 sizeof(u32),
5247 (SCD_FRAME_LIMIT <<
5248 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
5249 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
5250
5251 }
5252 il_wr_prph(il, IL49_SCD_INTERRUPT_MASK,
5253 (1 << il->hw_params.max_txq_num) - 1);
5254
5255 /* Activate all Tx DMA/FIFO channels */
5256 il4965_txq_set_sched(il, IL_MASK(0, 6));
5257
5258 il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0);
5259
5260 /* make sure all queue are not stopped */
5261 memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped));
5262 for (i = 0; i < 4; i++)
5263 atomic_set(&il->queue_stop_count[i], 0);
5264
5265 /* reset to 0 to enable all the queue first */
5266 il->txq_ctx_active_msk = 0;
5267 /* Map each Tx/cmd queue to its corresponding fifo */
5268 BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7);
5269
5270 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
5271 int ac = default_queue_to_tx_fifo[i];
5272
5273 il_txq_ctx_activate(il, i);
5274
5275 if (ac == IL_TX_FIFO_UNUSED)
5276 continue;
5277
5278 il4965_tx_queue_set_status(il, &il->txq[i], ac, 0);
5279 }
5280
5281 spin_unlock_irqrestore(&il->lock, flags);
5282
5283 return 0;
5284 }
5285
5286 /**
5287 * il4965_alive_start - called after N_ALIVE notification received
5288 * from protocol/runtime uCode (initialization uCode's
5289 * Alive gets handled by il_init_alive_start()).
5290 */
5291 static void
5292 il4965_alive_start(struct il_priv *il)
5293 {
5294 int ret = 0;
5295
5296 D_INFO("Runtime Alive received.\n");
5297
5298 if (il->card_alive.is_valid != UCODE_VALID_OK) {
5299 /* We had an error bringing up the hardware, so take it
5300 * all the way back down so we can try again */
5301 D_INFO("Alive failed.\n");
5302 goto restart;
5303 }
5304
5305 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5306 * This is a paranoid check, because we would not have gotten the
5307 * "runtime" alive if code weren't properly loaded. */
5308 if (il4965_verify_ucode(il)) {
5309 /* Runtime instruction load was bad;
5310 * take it all the way back down so we can try again */
5311 D_INFO("Bad runtime uCode load.\n");
5312 goto restart;
5313 }
5314
5315 ret = il4965_alive_notify(il);
5316 if (ret) {
5317 IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret);
5318 goto restart;
5319 }
5320
5321 /* After the ALIVE response, we can send host commands to the uCode */
5322 set_bit(S_ALIVE, &il->status);
5323
5324 /* Enable watchdog to monitor the driver tx queues */
5325 il_setup_watchdog(il);
5326
5327 if (il_is_rfkill(il))
5328 return;
5329
5330 ieee80211_wake_queues(il->hw);
5331
5332 il->active_rate = RATES_MASK;
5333
5334 il_power_update_mode(il, true);
5335 D_INFO("Updated power mode\n");
5336
5337 if (il_is_associated(il)) {
5338 struct il_rxon_cmd *active_rxon =
5339 (struct il_rxon_cmd *)&il->active;
5340 /* apply any changes in staging */
5341 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
5342 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5343 } else {
5344 /* Initialize our rx_config data */
5345 il_connection_init_rx_config(il);
5346
5347 if (il->ops->set_rxon_chain)
5348 il->ops->set_rxon_chain(il);
5349 }
5350
5351 /* Configure bluetooth coexistence if enabled */
5352 il_send_bt_config(il);
5353
5354 il4965_reset_run_time_calib(il);
5355
5356 set_bit(S_READY, &il->status);
5357
5358 /* Configure the adapter for unassociated operation */
5359 il_commit_rxon(il);
5360
5361 /* At this point, the NIC is initialized and operational */
5362 il4965_rf_kill_ct_config(il);
5363
5364 D_INFO("ALIVE processing complete.\n");
5365 wake_up(&il->wait_command_queue);
5366
5367 return;
5368
5369 restart:
5370 queue_work(il->workqueue, &il->restart);
5371 }
5372
5373 static void il4965_cancel_deferred_work(struct il_priv *il);
5374
5375 static void
5376 __il4965_down(struct il_priv *il)
5377 {
5378 unsigned long flags;
5379 int exit_pending;
5380
5381 D_INFO(DRV_NAME " is going down\n");
5382
5383 il_scan_cancel_timeout(il, 200);
5384
5385 exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
5386
5387 /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
5388 * to prevent rearm timer */
5389 del_timer_sync(&il->watchdog);
5390
5391 il_clear_ucode_stations(il);
5392
5393 /* FIXME: race conditions ? */
5394 spin_lock_irq(&il->sta_lock);
5395 /*
5396 * Remove all key information that is not stored as part
5397 * of station information since mac80211 may not have had
5398 * a chance to remove all the keys. When device is
5399 * reconfigured by mac80211 after an error all keys will
5400 * be reconfigured.
5401 */
5402 memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys));
5403 il->_4965.key_mapping_keys = 0;
5404 spin_unlock_irq(&il->sta_lock);
5405
5406 il_dealloc_bcast_stations(il);
5407 il_clear_driver_stations(il);
5408
5409 /* Unblock any waiting calls */
5410 wake_up_all(&il->wait_command_queue);
5411
5412 /* Wipe out the EXIT_PENDING status bit if we are not actually
5413 * exiting the module */
5414 if (!exit_pending)
5415 clear_bit(S_EXIT_PENDING, &il->status);
5416
5417 /* stop and reset the on-board processor */
5418 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5419
5420 /* tell the device to stop sending interrupts */
5421 spin_lock_irqsave(&il->lock, flags);
5422 il_disable_interrupts(il);
5423 spin_unlock_irqrestore(&il->lock, flags);
5424 il4965_synchronize_irq(il);
5425
5426 if (il->mac80211_registered)
5427 ieee80211_stop_queues(il->hw);
5428
5429 /* If we have not previously called il_init() then
5430 * clear all bits but the RF Kill bit and return */
5431 if (!il_is_init(il)) {
5432 il->status =
5433 test_bit(S_RFKILL, &il->status) << S_RFKILL |
5434 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5435 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5436 goto exit;
5437 }
5438
5439 /* ...otherwise clear out all the status bits but the RF Kill
5440 * bit and continue taking the NIC down. */
5441 il->status &=
5442 test_bit(S_RFKILL, &il->status) << S_RFKILL |
5443 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5444 test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
5445 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5446
5447 /*
5448 * We disabled and synchronized interrupt, and priv->mutex is taken, so
5449 * here is the only thread which will program device registers, but
5450 * still have lockdep assertions, so we are taking reg_lock.
5451 */
5452 spin_lock_irq(&il->reg_lock);
5453 /* FIXME: il_grab_nic_access if rfkill is off ? */
5454
5455 il4965_txq_ctx_stop(il);
5456 il4965_rxq_stop(il);
5457 /* Power-down device's busmaster DMA clocks */
5458 _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
5459 udelay(5);
5460 /* Make sure (redundant) we've released our request to stay awake */
5461 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5462 /* Stop the device, and put it in low power state */
5463 _il_apm_stop(il);
5464
5465 spin_unlock_irq(&il->reg_lock);
5466
5467 il4965_txq_ctx_unmap(il);
5468 exit:
5469 memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
5470
5471 dev_kfree_skb(il->beacon_skb);
5472 il->beacon_skb = NULL;
5473
5474 /* clear out any free frames */
5475 il4965_clear_free_frames(il);
5476 }
5477
5478 static void
5479 il4965_down(struct il_priv *il)
5480 {
5481 mutex_lock(&il->mutex);
5482 __il4965_down(il);
5483 mutex_unlock(&il->mutex);
5484
5485 il4965_cancel_deferred_work(il);
5486 }
5487
5488
5489 static void
5490 il4965_set_hw_ready(struct il_priv *il)
5491 {
5492 int ret;
5493
5494 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
5495 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
5496
5497 /* See if we got it */
5498 ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5499 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5500 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5501 100);
5502 if (ret >= 0)
5503 il->hw_ready = true;
5504
5505 D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not");
5506 }
5507
5508 static void
5509 il4965_prepare_card_hw(struct il_priv *il)
5510 {
5511 int ret;
5512
5513 il->hw_ready = false;
5514
5515 il4965_set_hw_ready(il);
5516 if (il->hw_ready)
5517 return;
5518
5519 /* If HW is not ready, prepare the conditions to check again */
5520 il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE);
5521
5522 ret =
5523 _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5524 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
5525 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
5526
5527 /* HW should be ready by now, check again. */
5528 if (ret != -ETIMEDOUT)
5529 il4965_set_hw_ready(il);
5530 }
5531
5532 #define MAX_HW_RESTARTS 5
5533
5534 static int
5535 __il4965_up(struct il_priv *il)
5536 {
5537 int i;
5538 int ret;
5539
5540 if (test_bit(S_EXIT_PENDING, &il->status)) {
5541 IL_WARN("Exit pending; will not bring the NIC up\n");
5542 return -EIO;
5543 }
5544
5545 if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
5546 IL_ERR("ucode not available for device bringup\n");
5547 return -EIO;
5548 }
5549
5550 ret = il4965_alloc_bcast_station(il);
5551 if (ret) {
5552 il_dealloc_bcast_stations(il);
5553 return ret;
5554 }
5555
5556 il4965_prepare_card_hw(il);
5557 if (!il->hw_ready) {
5558 il_dealloc_bcast_stations(il);
5559 IL_ERR("HW not ready\n");
5560 return -EIO;
5561 }
5562
5563 /* If platform's RF_KILL switch is NOT set to KILL */
5564 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5565 clear_bit(S_RFKILL, &il->status);
5566 else {
5567 set_bit(S_RFKILL, &il->status);
5568 wiphy_rfkill_set_hw_state(il->hw->wiphy, true);
5569
5570 il_dealloc_bcast_stations(il);
5571 il_enable_rfkill_int(il);
5572 IL_WARN("Radio disabled by HW RF Kill switch\n");
5573 return 0;
5574 }
5575
5576 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5577
5578 /* must be initialised before il_hw_nic_init */
5579 il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM;
5580
5581 ret = il4965_hw_nic_init(il);
5582 if (ret) {
5583 IL_ERR("Unable to init nic\n");
5584 il_dealloc_bcast_stations(il);
5585 return ret;
5586 }
5587
5588 /* make sure rfkill handshake bits are cleared */
5589 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5590 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5591
5592 /* clear (again), then enable host interrupts */
5593 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5594 il_enable_interrupts(il);
5595
5596 /* really make sure rfkill handshake bits are cleared */
5597 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5598 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5599
5600 /* Copy original ucode data image from disk into backup cache.
5601 * This will be used to initialize the on-board processor's
5602 * data SRAM for a clean start when the runtime program first loads. */
5603 memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
5604 il->ucode_data.len);
5605
5606 for (i = 0; i < MAX_HW_RESTARTS; i++) {
5607
5608 /* load bootstrap state machine,
5609 * load bootstrap program into processor's memory,
5610 * prepare to load the "initialize" uCode */
5611 ret = il->ops->load_ucode(il);
5612
5613 if (ret) {
5614 IL_ERR("Unable to set up bootstrap uCode: %d\n", ret);
5615 continue;
5616 }
5617
5618 /* start card; "initialize" will load runtime ucode */
5619 il4965_nic_start(il);
5620
5621 D_INFO(DRV_NAME " is coming up\n");
5622
5623 return 0;
5624 }
5625
5626 set_bit(S_EXIT_PENDING, &il->status);
5627 __il4965_down(il);
5628 clear_bit(S_EXIT_PENDING, &il->status);
5629
5630 /* tried to restart and config the device for as long as our
5631 * patience could withstand */
5632 IL_ERR("Unable to initialize device after %d attempts.\n", i);
5633 return -EIO;
5634 }
5635
5636 /*****************************************************************************
5637 *
5638 * Workqueue callbacks
5639 *
5640 *****************************************************************************/
5641
5642 static void
5643 il4965_bg_init_alive_start(struct work_struct *data)
5644 {
5645 struct il_priv *il =
5646 container_of(data, struct il_priv, init_alive_start.work);
5647
5648 mutex_lock(&il->mutex);
5649 if (test_bit(S_EXIT_PENDING, &il->status))
5650 goto out;
5651
5652 il->ops->init_alive_start(il);
5653 out:
5654 mutex_unlock(&il->mutex);
5655 }
5656
5657 static void
5658 il4965_bg_alive_start(struct work_struct *data)
5659 {
5660 struct il_priv *il =
5661 container_of(data, struct il_priv, alive_start.work);
5662
5663 mutex_lock(&il->mutex);
5664 if (test_bit(S_EXIT_PENDING, &il->status))
5665 goto out;
5666
5667 il4965_alive_start(il);
5668 out:
5669 mutex_unlock(&il->mutex);
5670 }
5671
5672 static void
5673 il4965_bg_run_time_calib_work(struct work_struct *work)
5674 {
5675 struct il_priv *il = container_of(work, struct il_priv,
5676 run_time_calib_work);
5677
5678 mutex_lock(&il->mutex);
5679
5680 if (test_bit(S_EXIT_PENDING, &il->status) ||
5681 test_bit(S_SCANNING, &il->status)) {
5682 mutex_unlock(&il->mutex);
5683 return;
5684 }
5685
5686 if (il->start_calib) {
5687 il4965_chain_noise_calibration(il, (void *)&il->_4965.stats);
5688 il4965_sensitivity_calibration(il, (void *)&il->_4965.stats);
5689 }
5690
5691 mutex_unlock(&il->mutex);
5692 }
5693
5694 static void
5695 il4965_bg_restart(struct work_struct *data)
5696 {
5697 struct il_priv *il = container_of(data, struct il_priv, restart);
5698
5699 if (test_bit(S_EXIT_PENDING, &il->status))
5700 return;
5701
5702 if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
5703 mutex_lock(&il->mutex);
5704 il->is_open = 0;
5705
5706 __il4965_down(il);
5707
5708 mutex_unlock(&il->mutex);
5709 il4965_cancel_deferred_work(il);
5710 ieee80211_restart_hw(il->hw);
5711 } else {
5712 il4965_down(il);
5713
5714 mutex_lock(&il->mutex);
5715 if (test_bit(S_EXIT_PENDING, &il->status)) {
5716 mutex_unlock(&il->mutex);
5717 return;
5718 }
5719
5720 __il4965_up(il);
5721 mutex_unlock(&il->mutex);
5722 }
5723 }
5724
5725 static void
5726 il4965_bg_rx_replenish(struct work_struct *data)
5727 {
5728 struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
5729
5730 if (test_bit(S_EXIT_PENDING, &il->status))
5731 return;
5732
5733 mutex_lock(&il->mutex);
5734 il4965_rx_replenish(il);
5735 mutex_unlock(&il->mutex);
5736 }
5737
5738 /*****************************************************************************
5739 *
5740 * mac80211 entry point functions
5741 *
5742 *****************************************************************************/
5743
5744 #define UCODE_READY_TIMEOUT (4 * HZ)
5745
5746 /*
5747 * Not a mac80211 entry point function, but it fits in with all the
5748 * other mac80211 functions grouped here.
5749 */
5750 static int
5751 il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length)
5752 {
5753 int ret;
5754 struct ieee80211_hw *hw = il->hw;
5755
5756 hw->rate_control_algorithm = "iwl-4965-rs";
5757
5758 /* Tell mac80211 our characteristics */
5759 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
5760 ieee80211_hw_set(hw, SUPPORTS_PS);
5761 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
5762 ieee80211_hw_set(hw, SPECTRUM_MGMT);
5763 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
5764 ieee80211_hw_set(hw, SIGNAL_DBM);
5765 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
5766 if (il->cfg->sku & IL_SKU_N)
5767 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
5768 NL80211_FEATURE_STATIC_SMPS;
5769
5770 hw->sta_data_size = sizeof(struct il_station_priv);
5771 hw->vif_data_size = sizeof(struct il_vif_priv);
5772
5773 hw->wiphy->interface_modes =
5774 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
5775
5776 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
5777 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
5778 REGULATORY_DISABLE_BEACON_HINTS;
5779
5780 /*
5781 * For now, disable PS by default because it affects
5782 * RX performance significantly.
5783 */
5784 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
5785
5786 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
5787 /* we create the 802.11 header and a zero-length SSID element */
5788 hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2;
5789
5790 /* Default value; 4 EDCA QOS priorities */
5791 hw->queues = 4;
5792
5793 hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL;
5794
5795 if (il->bands[NL80211_BAND_2GHZ].n_channels)
5796 il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
5797 &il->bands[NL80211_BAND_2GHZ];
5798 if (il->bands[NL80211_BAND_5GHZ].n_channels)
5799 il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
5800 &il->bands[NL80211_BAND_5GHZ];
5801
5802 il_leds_init(il);
5803
5804 wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
5805
5806 ret = ieee80211_register_hw(il->hw);
5807 if (ret) {
5808 IL_ERR("Failed to register hw (error %d)\n", ret);
5809 return ret;
5810 }
5811 il->mac80211_registered = 1;
5812
5813 return 0;
5814 }
5815
5816 int
5817 il4965_mac_start(struct ieee80211_hw *hw)
5818 {
5819 struct il_priv *il = hw->priv;
5820 int ret;
5821
5822 D_MAC80211("enter\n");
5823
5824 /* we should be verifying the device is ready to be opened */
5825 mutex_lock(&il->mutex);
5826 ret = __il4965_up(il);
5827 mutex_unlock(&il->mutex);
5828
5829 if (ret)
5830 return ret;
5831
5832 if (il_is_rfkill(il))
5833 goto out;
5834
5835 D_INFO("Start UP work done.\n");
5836
5837 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
5838 * mac80211 will not be run successfully. */
5839 ret = wait_event_timeout(il->wait_command_queue,
5840 test_bit(S_READY, &il->status),
5841 UCODE_READY_TIMEOUT);
5842 if (!ret) {
5843 if (!test_bit(S_READY, &il->status)) {
5844 IL_ERR("START_ALIVE timeout after %dms.\n",
5845 jiffies_to_msecs(UCODE_READY_TIMEOUT));
5846 return -ETIMEDOUT;
5847 }
5848 }
5849
5850 il4965_led_enable(il);
5851
5852 out:
5853 il->is_open = 1;
5854 D_MAC80211("leave\n");
5855 return 0;
5856 }
5857
5858 void
5859 il4965_mac_stop(struct ieee80211_hw *hw)
5860 {
5861 struct il_priv *il = hw->priv;
5862
5863 D_MAC80211("enter\n");
5864
5865 if (!il->is_open)
5866 return;
5867
5868 il->is_open = 0;
5869
5870 il4965_down(il);
5871
5872 flush_workqueue(il->workqueue);
5873
5874 /* User space software may expect getting rfkill changes
5875 * even if interface is down */
5876 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5877 il_enable_rfkill_int(il);
5878
5879 D_MAC80211("leave\n");
5880 }
5881
5882 void
5883 il4965_mac_tx(struct ieee80211_hw *hw,
5884 struct ieee80211_tx_control *control,
5885 struct sk_buff *skb)
5886 {
5887 struct il_priv *il = hw->priv;
5888
5889 D_MACDUMP("enter\n");
5890
5891 D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5892 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
5893
5894 if (il4965_tx_skb(il, control->sta, skb))
5895 dev_kfree_skb_any(skb);
5896
5897 D_MACDUMP("leave\n");
5898 }
5899
5900 void
5901 il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5902 struct ieee80211_key_conf *keyconf,
5903 struct ieee80211_sta *sta, u32 iv32, u16 * phase1key)
5904 {
5905 struct il_priv *il = hw->priv;
5906
5907 D_MAC80211("enter\n");
5908
5909 il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key);
5910
5911 D_MAC80211("leave\n");
5912 }
5913
5914 int
5915 il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
5916 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
5917 struct ieee80211_key_conf *key)
5918 {
5919 struct il_priv *il = hw->priv;
5920 int ret;
5921 u8 sta_id;
5922 bool is_default_wep_key = false;
5923
5924 D_MAC80211("enter\n");
5925
5926 if (il->cfg->mod_params->sw_crypto) {
5927 D_MAC80211("leave - hwcrypto disabled\n");
5928 return -EOPNOTSUPP;
5929 }
5930
5931 /*
5932 * To support IBSS RSN, don't program group keys in IBSS, the
5933 * hardware will then not attempt to decrypt the frames.
5934 */
5935 if (vif->type == NL80211_IFTYPE_ADHOC &&
5936 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
5937 D_MAC80211("leave - ad-hoc group key\n");
5938 return -EOPNOTSUPP;
5939 }
5940
5941 sta_id = il_sta_id_or_broadcast(il, sta);
5942 if (sta_id == IL_INVALID_STATION)
5943 return -EINVAL;
5944
5945 mutex_lock(&il->mutex);
5946 il_scan_cancel_timeout(il, 100);
5947
5948 /*
5949 * If we are getting WEP group key and we didn't receive any key mapping
5950 * so far, we are in legacy wep mode (group key only), otherwise we are
5951 * in 1X mode.
5952 * In legacy wep mode, we use another host command to the uCode.
5953 */
5954 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
5955 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
5956 if (cmd == SET_KEY)
5957 is_default_wep_key = !il->_4965.key_mapping_keys;
5958 else
5959 is_default_wep_key =
5960 (key->hw_key_idx == HW_KEY_DEFAULT);
5961 }
5962
5963 switch (cmd) {
5964 case SET_KEY:
5965 if (is_default_wep_key)
5966 ret = il4965_set_default_wep_key(il, key);
5967 else
5968 ret = il4965_set_dynamic_key(il, key, sta_id);
5969
5970 D_MAC80211("enable hwcrypto key\n");
5971 break;
5972 case DISABLE_KEY:
5973 if (is_default_wep_key)
5974 ret = il4965_remove_default_wep_key(il, key);
5975 else
5976 ret = il4965_remove_dynamic_key(il, key, sta_id);
5977
5978 D_MAC80211("disable hwcrypto key\n");
5979 break;
5980 default:
5981 ret = -EINVAL;
5982 }
5983
5984 mutex_unlock(&il->mutex);
5985 D_MAC80211("leave\n");
5986
5987 return ret;
5988 }
5989
5990 int
5991 il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5992 struct ieee80211_ampdu_params *params)
5993 {
5994 struct il_priv *il = hw->priv;
5995 int ret = -EINVAL;
5996 struct ieee80211_sta *sta = params->sta;
5997 enum ieee80211_ampdu_mlme_action action = params->action;
5998 u16 tid = params->tid;
5999 u16 *ssn = &params->ssn;
6000
6001 D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid);
6002
6003 if (!(il->cfg->sku & IL_SKU_N))
6004 return -EACCES;
6005
6006 mutex_lock(&il->mutex);
6007
6008 switch (action) {
6009 case IEEE80211_AMPDU_RX_START:
6010 D_HT("start Rx\n");
6011 ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn);
6012 break;
6013 case IEEE80211_AMPDU_RX_STOP:
6014 D_HT("stop Rx\n");
6015 ret = il4965_sta_rx_agg_stop(il, sta, tid);
6016 if (test_bit(S_EXIT_PENDING, &il->status))
6017 ret = 0;
6018 break;
6019 case IEEE80211_AMPDU_TX_START:
6020 D_HT("start Tx\n");
6021 ret = il4965_tx_agg_start(il, vif, sta, tid, ssn);
6022 break;
6023 case IEEE80211_AMPDU_TX_STOP_CONT:
6024 case IEEE80211_AMPDU_TX_STOP_FLUSH:
6025 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
6026 D_HT("stop Tx\n");
6027 ret = il4965_tx_agg_stop(il, vif, sta, tid);
6028 if (test_bit(S_EXIT_PENDING, &il->status))
6029 ret = 0;
6030 break;
6031 case IEEE80211_AMPDU_TX_OPERATIONAL:
6032 ret = 0;
6033 break;
6034 }
6035 mutex_unlock(&il->mutex);
6036
6037 return ret;
6038 }
6039
6040 int
6041 il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6042 struct ieee80211_sta *sta)
6043 {
6044 struct il_priv *il = hw->priv;
6045 struct il_station_priv *sta_priv = (void *)sta->drv_priv;
6046 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
6047 int ret;
6048 u8 sta_id;
6049
6050 D_INFO("received request to add station %pM\n", sta->addr);
6051 mutex_lock(&il->mutex);
6052 D_INFO("proceeding to add station %pM\n", sta->addr);
6053 sta_priv->common.sta_id = IL_INVALID_STATION;
6054
6055 atomic_set(&sta_priv->pending_frames, 0);
6056
6057 ret =
6058 il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
6059 if (ret) {
6060 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
6061 /* Should we return success if return code is EEXIST ? */
6062 mutex_unlock(&il->mutex);
6063 return ret;
6064 }
6065
6066 sta_priv->common.sta_id = sta_id;
6067
6068 /* Initialize rate scaling */
6069 D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
6070 il4965_rs_rate_init(il, sta, sta_id);
6071 mutex_unlock(&il->mutex);
6072
6073 return 0;
6074 }
6075
6076 void
6077 il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6078 struct ieee80211_channel_switch *ch_switch)
6079 {
6080 struct il_priv *il = hw->priv;
6081 const struct il_channel_info *ch_info;
6082 struct ieee80211_conf *conf = &hw->conf;
6083 struct ieee80211_channel *channel = ch_switch->chandef.chan;
6084 struct il_ht_config *ht_conf = &il->current_ht_config;
6085 u16 ch;
6086
6087 D_MAC80211("enter\n");
6088
6089 mutex_lock(&il->mutex);
6090
6091 if (il_is_rfkill(il))
6092 goto out;
6093
6094 if (test_bit(S_EXIT_PENDING, &il->status) ||
6095 test_bit(S_SCANNING, &il->status) ||
6096 test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
6097 goto out;
6098
6099 if (!il_is_associated(il))
6100 goto out;
6101
6102 if (!il->ops->set_channel_switch)
6103 goto out;
6104
6105 ch = channel->hw_value;
6106 if (le16_to_cpu(il->active.channel) == ch)
6107 goto out;
6108
6109 ch_info = il_get_channel_info(il, channel->band, ch);
6110 if (!il_is_channel_valid(ch_info)) {
6111 D_MAC80211("invalid channel\n");
6112 goto out;
6113 }
6114
6115 spin_lock_irq(&il->lock);
6116
6117 il->current_ht_config.smps = conf->smps_mode;
6118
6119 /* Configure HT40 channels */
6120 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
6121 case NL80211_CHAN_NO_HT:
6122 case NL80211_CHAN_HT20:
6123 il->ht.is_40mhz = false;
6124 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
6125 break;
6126 case NL80211_CHAN_HT40MINUS:
6127 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
6128 il->ht.is_40mhz = true;
6129 break;
6130 case NL80211_CHAN_HT40PLUS:
6131 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
6132 il->ht.is_40mhz = true;
6133 break;
6134 }
6135
6136 if ((le16_to_cpu(il->staging.channel) != ch))
6137 il->staging.flags = 0;
6138
6139 il_set_rxon_channel(il, channel);
6140 il_set_rxon_ht(il, ht_conf);
6141 il_set_flags_for_band(il, channel->band, il->vif);
6142
6143 spin_unlock_irq(&il->lock);
6144
6145 il_set_rate(il);
6146 /*
6147 * at this point, staging_rxon has the
6148 * configuration for channel switch
6149 */
6150 set_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6151 il->switch_channel = cpu_to_le16(ch);
6152 if (il->ops->set_channel_switch(il, ch_switch)) {
6153 clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6154 il->switch_channel = 0;
6155 ieee80211_chswitch_done(il->vif, false);
6156 }
6157
6158 out:
6159 mutex_unlock(&il->mutex);
6160 D_MAC80211("leave\n");
6161 }
6162
6163 void
6164 il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
6165 unsigned int *total_flags, u64 multicast)
6166 {
6167 struct il_priv *il = hw->priv;
6168 __le32 filter_or = 0, filter_nand = 0;
6169
6170 #define CHK(test, flag) do { \
6171 if (*total_flags & (test)) \
6172 filter_or |= (flag); \
6173 else \
6174 filter_nand |= (flag); \
6175 } while (0)
6176
6177 D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
6178 *total_flags);
6179
6180 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
6181 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
6182 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
6183 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
6184
6185 #undef CHK
6186
6187 mutex_lock(&il->mutex);
6188
6189 il->staging.filter_flags &= ~filter_nand;
6190 il->staging.filter_flags |= filter_or;
6191
6192 /*
6193 * Not committing directly because hardware can perform a scan,
6194 * but we'll eventually commit the filter flags change anyway.
6195 */
6196
6197 mutex_unlock(&il->mutex);
6198
6199 /*
6200 * Receiving all multicast frames is always enabled by the
6201 * default flags setup in il_connection_init_rx_config()
6202 * since we currently do not support programming multicast
6203 * filters into the device.
6204 */
6205 *total_flags &=
6206 FIF_OTHER_BSS | FIF_ALLMULTI |
6207 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6208 }
6209
6210 /*****************************************************************************
6211 *
6212 * driver setup and teardown
6213 *
6214 *****************************************************************************/
6215
6216 static void
6217 il4965_bg_txpower_work(struct work_struct *work)
6218 {
6219 struct il_priv *il = container_of(work, struct il_priv,
6220 txpower_work);
6221
6222 mutex_lock(&il->mutex);
6223
6224 /* If a scan happened to start before we got here
6225 * then just return; the stats notification will
6226 * kick off another scheduled work to compensate for
6227 * any temperature delta we missed here. */
6228 if (test_bit(S_EXIT_PENDING, &il->status) ||
6229 test_bit(S_SCANNING, &il->status))
6230 goto out;
6231
6232 /* Regardless of if we are associated, we must reconfigure the
6233 * TX power since frames can be sent on non-radar channels while
6234 * not associated */
6235 il->ops->send_tx_power(il);
6236
6237 /* Update last_temperature to keep is_calib_needed from running
6238 * when it isn't needed... */
6239 il->last_temperature = il->temperature;
6240 out:
6241 mutex_unlock(&il->mutex);
6242 }
6243
6244 static void
6245 il4965_setup_deferred_work(struct il_priv *il)
6246 {
6247 il->workqueue = create_singlethread_workqueue(DRV_NAME);
6248
6249 init_waitqueue_head(&il->wait_command_queue);
6250
6251 INIT_WORK(&il->restart, il4965_bg_restart);
6252 INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish);
6253 INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work);
6254 INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start);
6255 INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start);
6256
6257 il_setup_scan_deferred_work(il);
6258
6259 INIT_WORK(&il->txpower_work, il4965_bg_txpower_work);
6260
6261 timer_setup(&il->stats_periodic, il4965_bg_stats_periodic, 0);
6262
6263 timer_setup(&il->watchdog, il_bg_watchdog, 0);
6264
6265 tasklet_init(&il->irq_tasklet,
6266 (void (*)(unsigned long))il4965_irq_tasklet,
6267 (unsigned long)il);
6268 }
6269
6270 static void
6271 il4965_cancel_deferred_work(struct il_priv *il)
6272 {
6273 cancel_work_sync(&il->txpower_work);
6274 cancel_delayed_work_sync(&il->init_alive_start);
6275 cancel_delayed_work(&il->alive_start);
6276 cancel_work_sync(&il->run_time_calib_work);
6277
6278 il_cancel_scan_deferred_work(il);
6279
6280 del_timer_sync(&il->stats_periodic);
6281 }
6282
6283 static void
6284 il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
6285 {
6286 int i;
6287
6288 for (i = 0; i < RATE_COUNT_LEGACY; i++) {
6289 rates[i].bitrate = il_rates[i].ieee * 5;
6290 rates[i].hw_value = i; /* Rate scaling will work on idxes */
6291 rates[i].hw_value_short = i;
6292 rates[i].flags = 0;
6293 if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) {
6294 /*
6295 * If CCK != 1M then set short preamble rate flag.
6296 */
6297 rates[i].flags |=
6298 (il_rates[i].plcp ==
6299 RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
6300 }
6301 }
6302 }
6303
6304 /*
6305 * Acquire il->lock before calling this function !
6306 */
6307 void
6308 il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx)
6309 {
6310 il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8));
6311 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx);
6312 }
6313
6314 void
6315 il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq,
6316 int tx_fifo_id, int scd_retry)
6317 {
6318 int txq_id = txq->q.id;
6319
6320 /* Find out whether to activate Tx queue */
6321 int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0;
6322
6323 /* Set up and activate */
6324 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
6325 (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
6326 (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) |
6327 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) |
6328 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
6329 IL49_SCD_QUEUE_STTS_REG_MSK);
6330
6331 txq->sched_retry = scd_retry;
6332
6333 D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate",
6334 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
6335 }
6336
6337 static const struct ieee80211_ops il4965_mac_ops = {
6338 .tx = il4965_mac_tx,
6339 .start = il4965_mac_start,
6340 .stop = il4965_mac_stop,
6341 .add_interface = il_mac_add_interface,
6342 .remove_interface = il_mac_remove_interface,
6343 .change_interface = il_mac_change_interface,
6344 .config = il_mac_config,
6345 .configure_filter = il4965_configure_filter,
6346 .set_key = il4965_mac_set_key,
6347 .update_tkip_key = il4965_mac_update_tkip_key,
6348 .conf_tx = il_mac_conf_tx,
6349 .reset_tsf = il_mac_reset_tsf,
6350 .bss_info_changed = il_mac_bss_info_changed,
6351 .ampdu_action = il4965_mac_ampdu_action,
6352 .hw_scan = il_mac_hw_scan,
6353 .sta_add = il4965_mac_sta_add,
6354 .sta_remove = il_mac_sta_remove,
6355 .channel_switch = il4965_mac_channel_switch,
6356 .tx_last_beacon = il_mac_tx_last_beacon,
6357 .flush = il_mac_flush,
6358 };
6359
6360 static int
6361 il4965_init_drv(struct il_priv *il)
6362 {
6363 int ret;
6364
6365 spin_lock_init(&il->sta_lock);
6366 spin_lock_init(&il->hcmd_lock);
6367
6368 INIT_LIST_HEAD(&il->free_frames);
6369
6370 mutex_init(&il->mutex);
6371
6372 il->ieee_channels = NULL;
6373 il->ieee_rates = NULL;
6374 il->band = NL80211_BAND_2GHZ;
6375
6376 il->iw_mode = NL80211_IFTYPE_STATION;
6377 il->current_ht_config.smps = IEEE80211_SMPS_STATIC;
6378 il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
6379
6380 /* initialize force reset */
6381 il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
6382
6383 /* Choose which receivers/antennas to use */
6384 if (il->ops->set_rxon_chain)
6385 il->ops->set_rxon_chain(il);
6386
6387 il_init_scan_params(il);
6388
6389 ret = il_init_channel_map(il);
6390 if (ret) {
6391 IL_ERR("initializing regulatory failed: %d\n", ret);
6392 goto err;
6393 }
6394
6395 ret = il_init_geos(il);
6396 if (ret) {
6397 IL_ERR("initializing geos failed: %d\n", ret);
6398 goto err_free_channel_map;
6399 }
6400 il4965_init_hw_rates(il, il->ieee_rates);
6401
6402 return 0;
6403
6404 err_free_channel_map:
6405 il_free_channel_map(il);
6406 err:
6407 return ret;
6408 }
6409
6410 static void
6411 il4965_uninit_drv(struct il_priv *il)
6412 {
6413 il_free_geos(il);
6414 il_free_channel_map(il);
6415 kfree(il->scan_cmd);
6416 }
6417
6418 static void
6419 il4965_hw_detect(struct il_priv *il)
6420 {
6421 il->hw_rev = _il_rd(il, CSR_HW_REV);
6422 il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG);
6423 il->rev_id = il->pci_dev->revision;
6424 D_INFO("HW Revision ID = 0x%X\n", il->rev_id);
6425 }
6426
6427 static const struct il_sensitivity_ranges il4965_sensitivity = {
6428 .min_nrg_cck = 97,
6429 .max_nrg_cck = 0, /* not used, set to 0 */
6430
6431 .auto_corr_min_ofdm = 85,
6432 .auto_corr_min_ofdm_mrc = 170,
6433 .auto_corr_min_ofdm_x1 = 105,
6434 .auto_corr_min_ofdm_mrc_x1 = 220,
6435
6436 .auto_corr_max_ofdm = 120,
6437 .auto_corr_max_ofdm_mrc = 210,
6438 .auto_corr_max_ofdm_x1 = 140,
6439 .auto_corr_max_ofdm_mrc_x1 = 270,
6440
6441 .auto_corr_min_cck = 125,
6442 .auto_corr_max_cck = 200,
6443 .auto_corr_min_cck_mrc = 200,
6444 .auto_corr_max_cck_mrc = 400,
6445
6446 .nrg_th_cck = 100,
6447 .nrg_th_ofdm = 100,
6448
6449 .barker_corr_th_min = 190,
6450 .barker_corr_th_min_mrc = 390,
6451 .nrg_th_cca = 62,
6452 };
6453
6454 static void
6455 il4965_set_hw_params(struct il_priv *il)
6456 {
6457 il->hw_params.bcast_id = IL4965_BROADCAST_ID;
6458 il->hw_params.max_rxq_size = RX_QUEUE_SIZE;
6459 il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
6460 if (il->cfg->mod_params->amsdu_size_8K)
6461 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K);
6462 else
6463 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K);
6464
6465 il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL;
6466
6467 if (il->cfg->mod_params->disable_11n)
6468 il->cfg->sku &= ~IL_SKU_N;
6469
6470 if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES &&
6471 il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES)
6472 il->cfg->num_of_queues =
6473 il->cfg->mod_params->num_of_queues;
6474
6475 il->hw_params.max_txq_num = il->cfg->num_of_queues;
6476 il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
6477 il->hw_params.scd_bc_tbls_size =
6478 il->cfg->num_of_queues *
6479 sizeof(struct il4965_scd_bc_tbl);
6480
6481 il->hw_params.tfd_size = sizeof(struct il_tfd);
6482 il->hw_params.max_stations = IL4965_STATION_COUNT;
6483 il->hw_params.max_data_size = IL49_RTC_DATA_SIZE;
6484 il->hw_params.max_inst_size = IL49_RTC_INST_SIZE;
6485 il->hw_params.max_bsm_size = BSM_SRAM_SIZE;
6486 il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ);
6487
6488 il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR;
6489
6490 il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant);
6491 il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant);
6492 il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant;
6493 il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant;
6494
6495 il->hw_params.ct_kill_threshold =
6496 CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY);
6497
6498 il->hw_params.sens = &il4965_sensitivity;
6499 il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS;
6500 }
6501
6502 static int
6503 il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6504 {
6505 int err = 0;
6506 struct il_priv *il;
6507 struct ieee80211_hw *hw;
6508 struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
6509 unsigned long flags;
6510 u16 pci_cmd;
6511
6512 /************************
6513 * 1. Allocating HW data
6514 ************************/
6515
6516 hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops);
6517 if (!hw) {
6518 err = -ENOMEM;
6519 goto out;
6520 }
6521 il = hw->priv;
6522 il->hw = hw;
6523 SET_IEEE80211_DEV(hw, &pdev->dev);
6524
6525 D_INFO("*** LOAD DRIVER ***\n");
6526 il->cfg = cfg;
6527 il->ops = &il4965_ops;
6528 #ifdef CONFIG_IWLEGACY_DEBUGFS
6529 il->debugfs_ops = &il4965_debugfs_ops;
6530 #endif
6531 il->pci_dev = pdev;
6532 il->inta_mask = CSR_INI_SET_MASK;
6533
6534 /**************************
6535 * 2. Initializing PCI bus
6536 **************************/
6537 pci_disable_link_state(pdev,
6538 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
6539 PCIE_LINK_STATE_CLKPM);
6540
6541 if (pci_enable_device(pdev)) {
6542 err = -ENODEV;
6543 goto out_ieee80211_free_hw;
6544 }
6545
6546 pci_set_master(pdev);
6547
6548 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
6549 if (!err)
6550 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
6551 if (err) {
6552 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
6553 if (!err)
6554 err =
6555 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
6556 /* both attempts failed: */
6557 if (err) {
6558 IL_WARN("No suitable DMA available.\n");
6559 goto out_pci_disable_device;
6560 }
6561 }
6562
6563 err = pci_request_regions(pdev, DRV_NAME);
6564 if (err)
6565 goto out_pci_disable_device;
6566
6567 pci_set_drvdata(pdev, il);
6568
6569 /***********************
6570 * 3. Read REV register
6571 ***********************/
6572 il->hw_base = pci_ioremap_bar(pdev, 0);
6573 if (!il->hw_base) {
6574 err = -ENODEV;
6575 goto out_pci_release_regions;
6576 }
6577
6578 D_INFO("pci_resource_len = 0x%08llx\n",
6579 (unsigned long long)pci_resource_len(pdev, 0));
6580 D_INFO("pci_resource_base = %p\n", il->hw_base);
6581
6582 /* these spin locks will be used in apm_ops.init and EEPROM access
6583 * we should init now
6584 */
6585 spin_lock_init(&il->reg_lock);
6586 spin_lock_init(&il->lock);
6587
6588 /*
6589 * stop and reset the on-board processor just in case it is in a
6590 * strange state ... like being left stranded by a primary kernel
6591 * and this is now the kdump kernel trying to start up
6592 */
6593 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6594
6595 il4965_hw_detect(il);
6596 IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev);
6597
6598 /* We disable the RETRY_TIMEOUT register (0x41) to keep
6599 * PCI Tx retries from interfering with C3 CPU state */
6600 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
6601
6602 il4965_prepare_card_hw(il);
6603 if (!il->hw_ready) {
6604 IL_WARN("Failed, HW not ready\n");
6605 err = -EIO;
6606 goto out_iounmap;
6607 }
6608
6609 /*****************
6610 * 4. Read EEPROM
6611 *****************/
6612 /* Read the EEPROM */
6613 err = il_eeprom_init(il);
6614 if (err) {
6615 IL_ERR("Unable to init EEPROM\n");
6616 goto out_iounmap;
6617 }
6618 err = il4965_eeprom_check_version(il);
6619 if (err)
6620 goto out_free_eeprom;
6621
6622 /* extract MAC Address */
6623 il4965_eeprom_get_mac(il, il->addresses[0].addr);
6624 D_INFO("MAC address: %pM\n", il->addresses[0].addr);
6625 il->hw->wiphy->addresses = il->addresses;
6626 il->hw->wiphy->n_addresses = 1;
6627
6628 /************************
6629 * 5. Setup HW constants
6630 ************************/
6631 il4965_set_hw_params(il);
6632
6633 /*******************
6634 * 6. Setup il
6635 *******************/
6636
6637 err = il4965_init_drv(il);
6638 if (err)
6639 goto out_free_eeprom;
6640 /* At this point both hw and il are initialized. */
6641
6642 /********************
6643 * 7. Setup services
6644 ********************/
6645 spin_lock_irqsave(&il->lock, flags);
6646 il_disable_interrupts(il);
6647 spin_unlock_irqrestore(&il->lock, flags);
6648
6649 pci_enable_msi(il->pci_dev);
6650
6651 err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
6652 if (err) {
6653 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
6654 goto out_disable_msi;
6655 }
6656
6657 il4965_setup_deferred_work(il);
6658 il4965_setup_handlers(il);
6659
6660 /*********************************************
6661 * 8. Enable interrupts and read RFKILL state
6662 *********************************************/
6663
6664 /* enable rfkill interrupt: hw bug w/a */
6665 pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd);
6666 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
6667 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
6668 pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd);
6669 }
6670
6671 il_enable_rfkill_int(il);
6672
6673 /* If platform's RF_KILL switch is NOT set to KILL */
6674 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6675 clear_bit(S_RFKILL, &il->status);
6676 else
6677 set_bit(S_RFKILL, &il->status);
6678
6679 wiphy_rfkill_set_hw_state(il->hw->wiphy,
6680 test_bit(S_RFKILL, &il->status));
6681
6682 il_power_initialize(il);
6683
6684 init_completion(&il->_4965.firmware_loading_complete);
6685
6686 err = il4965_request_firmware(il, true);
6687 if (err)
6688 goto out_destroy_workqueue;
6689
6690 return 0;
6691
6692 out_destroy_workqueue:
6693 destroy_workqueue(il->workqueue);
6694 il->workqueue = NULL;
6695 free_irq(il->pci_dev->irq, il);
6696 out_disable_msi:
6697 pci_disable_msi(il->pci_dev);
6698 il4965_uninit_drv(il);
6699 out_free_eeprom:
6700 il_eeprom_free(il);
6701 out_iounmap:
6702 iounmap(il->hw_base);
6703 out_pci_release_regions:
6704 pci_release_regions(pdev);
6705 out_pci_disable_device:
6706 pci_disable_device(pdev);
6707 out_ieee80211_free_hw:
6708 ieee80211_free_hw(il->hw);
6709 out:
6710 return err;
6711 }
6712
6713 static void
6714 il4965_pci_remove(struct pci_dev *pdev)
6715 {
6716 struct il_priv *il = pci_get_drvdata(pdev);
6717 unsigned long flags;
6718
6719 if (!il)
6720 return;
6721
6722 wait_for_completion(&il->_4965.firmware_loading_complete);
6723
6724 D_INFO("*** UNLOAD DRIVER ***\n");
6725
6726 il_dbgfs_unregister(il);
6727 sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group);
6728
6729 /* ieee80211_unregister_hw call wil cause il_mac_stop to
6730 * to be called and il4965_down since we are removing the device
6731 * we need to set S_EXIT_PENDING bit.
6732 */
6733 set_bit(S_EXIT_PENDING, &il->status);
6734
6735 il_leds_exit(il);
6736
6737 if (il->mac80211_registered) {
6738 ieee80211_unregister_hw(il->hw);
6739 il->mac80211_registered = 0;
6740 } else {
6741 il4965_down(il);
6742 }
6743
6744 /*
6745 * Make sure device is reset to low power before unloading driver.
6746 * This may be redundant with il4965_down(), but there are paths to
6747 * run il4965_down() without calling apm_ops.stop(), and there are
6748 * paths to avoid running il4965_down() at all before leaving driver.
6749 * This (inexpensive) call *makes sure* device is reset.
6750 */
6751 il_apm_stop(il);
6752
6753 /* make sure we flush any pending irq or
6754 * tasklet for the driver
6755 */
6756 spin_lock_irqsave(&il->lock, flags);
6757 il_disable_interrupts(il);
6758 spin_unlock_irqrestore(&il->lock, flags);
6759
6760 il4965_synchronize_irq(il);
6761
6762 il4965_dealloc_ucode_pci(il);
6763
6764 if (il->rxq.bd)
6765 il4965_rx_queue_free(il, &il->rxq);
6766 il4965_hw_txq_ctx_free(il);
6767
6768 il_eeprom_free(il);
6769
6770 /*netif_stop_queue(dev); */
6771 flush_workqueue(il->workqueue);
6772
6773 /* ieee80211_unregister_hw calls il_mac_stop, which flushes
6774 * il->workqueue... so we can't take down the workqueue
6775 * until now... */
6776 destroy_workqueue(il->workqueue);
6777 il->workqueue = NULL;
6778
6779 free_irq(il->pci_dev->irq, il);
6780 pci_disable_msi(il->pci_dev);
6781 iounmap(il->hw_base);
6782 pci_release_regions(pdev);
6783 pci_disable_device(pdev);
6784
6785 il4965_uninit_drv(il);
6786
6787 dev_kfree_skb(il->beacon_skb);
6788
6789 ieee80211_free_hw(il->hw);
6790 }
6791
6792 /*
6793 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
6794 * must be called under il->lock and mac access
6795 */
6796 void
6797 il4965_txq_set_sched(struct il_priv *il, u32 mask)
6798 {
6799 il_wr_prph(il, IL49_SCD_TXFACT, mask);
6800 }
6801
6802 /*****************************************************************************
6803 *
6804 * driver and module entry point
6805 *
6806 *****************************************************************************/
6807
6808 /* Hardware specific file defines the PCI IDs table for that hardware module */
6809 static const struct pci_device_id il4965_hw_card_ids[] = {
6810 {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)},
6811 {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)},
6812 {0}
6813 };
6814 MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids);
6815
6816 static struct pci_driver il4965_driver = {
6817 .name = DRV_NAME,
6818 .id_table = il4965_hw_card_ids,
6819 .probe = il4965_pci_probe,
6820 .remove = il4965_pci_remove,
6821 .driver.pm = IL_LEGACY_PM_OPS,
6822 };
6823
6824 static int __init
6825 il4965_init(void)
6826 {
6827
6828 int ret;
6829 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
6830 pr_info(DRV_COPYRIGHT "\n");
6831
6832 ret = il4965_rate_control_register();
6833 if (ret) {
6834 pr_err("Unable to register rate control algorithm: %d\n", ret);
6835 return ret;
6836 }
6837
6838 ret = pci_register_driver(&il4965_driver);
6839 if (ret) {
6840 pr_err("Unable to initialize PCI module\n");
6841 goto error_register;
6842 }
6843
6844 return ret;
6845
6846 error_register:
6847 il4965_rate_control_unregister();
6848 return ret;
6849 }
6850
6851 static void __exit
6852 il4965_exit(void)
6853 {
6854 pci_unregister_driver(&il4965_driver);
6855 il4965_rate_control_unregister();
6856 }
6857
6858 module_exit(il4965_exit);
6859 module_init(il4965_init);
6860
6861 #ifdef CONFIG_IWLEGACY_DEBUG
6862 module_param_named(debug, il_debug_level, uint, 0644);
6863 MODULE_PARM_DESC(debug, "debug output mask");
6864 #endif
6865
6866 module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, 0444);
6867 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
6868 module_param_named(queues_num, il4965_mod_params.num_of_queues, int, 0444);
6869 MODULE_PARM_DESC(queues_num, "number of hw queues.");
6870 module_param_named(11n_disable, il4965_mod_params.disable_11n, int, 0444);
6871 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
6872 module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 0444);
6873 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])");
6874 module_param_named(fw_restart, il4965_mod_params.restart_fw, int, 0444);
6875 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
Linux with added FPC-III support