1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 * 4 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. 5 * 6 * Portions of this file are derived from the ipw3945 project, as well 7 * as portions of the ieee80211 subsystem header files. 8 * 9 * Contact Information: 10 * Intel Linux Wireless <ilw@linux.intel.com> 11 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 12 * 13 *****************************************************************************/ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/pci.h> 21 #include <linux/slab.h> 22 #include <linux/dma-mapping.h> 23 #include <linux/delay.h> 24 #include <linux/sched.h> 25 #include <linux/skbuff.h> 26 #include <linux/netdevice.h> 27 #include <linux/firmware.h> 28 #include <linux/etherdevice.h> 29 #include <linux/if_arp.h> 30 #include <linux/units.h> 31 32 #include <net/mac80211.h> 33 34 #include <asm/div64.h> 35 36 #define DRV_NAME "iwl4965" 37 38 #include "common.h" 39 #include "4965.h" 40 41 /****************************************************************************** 42 * 43 * module boiler plate 44 * 45 ******************************************************************************/ 46 47 /* 48 * module name, copyright, version, etc. 49 */ 50 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux" 51 52 #ifdef CONFIG_IWLEGACY_DEBUG 53 #define VD "d" 54 #else 55 #define VD 56 #endif 57 58 #define DRV_VERSION IWLWIFI_VERSION VD 59 60 MODULE_DESCRIPTION(DRV_DESCRIPTION); 61 MODULE_VERSION(DRV_VERSION); 62 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); 63 MODULE_LICENSE("GPL"); 64 MODULE_ALIAS("iwl4965"); 65 66 void 67 il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status) 68 { 69 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { 70 IL_ERR("Tx flush command to flush out all frames\n"); 71 if (!test_bit(S_EXIT_PENDING, &il->status)) 72 queue_work(il->workqueue, &il->tx_flush); 73 } 74 } 75 76 /* 77 * EEPROM 78 */ 79 struct il_mod_params il4965_mod_params = { 80 .restart_fw = 1, 81 /* the rest are 0 by default */ 82 }; 83 84 void 85 il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq) 86 { 87 unsigned long flags; 88 int i; 89 spin_lock_irqsave(&rxq->lock, flags); 90 INIT_LIST_HEAD(&rxq->rx_free); 91 INIT_LIST_HEAD(&rxq->rx_used); 92 /* Fill the rx_used queue with _all_ of the Rx buffers */ 93 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { 94 /* In the reset function, these buffers may have been allocated 95 * to an SKB, so we need to unmap and free potential storage */ 96 if (rxq->pool[i].page != NULL) { 97 dma_unmap_page(&il->pci_dev->dev, 98 rxq->pool[i].page_dma, 99 PAGE_SIZE << il->hw_params.rx_page_order, 100 DMA_FROM_DEVICE); 101 __il_free_pages(il, rxq->pool[i].page); 102 rxq->pool[i].page = NULL; 103 } 104 list_add_tail(&rxq->pool[i].list, &rxq->rx_used); 105 } 106 107 for (i = 0; i < RX_QUEUE_SIZE; i++) 108 rxq->queue[i] = NULL; 109 110 /* Set us so that we have processed and used all buffers, but have 111 * not restocked the Rx queue with fresh buffers */ 112 rxq->read = rxq->write = 0; 113 rxq->write_actual = 0; 114 rxq->free_count = 0; 115 spin_unlock_irqrestore(&rxq->lock, flags); 116 } 117 118 int 119 il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq) 120 { 121 u32 rb_size; 122 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ 123 u32 rb_timeout = 0; 124 125 if (il->cfg->mod_params->amsdu_size_8K) 126 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; 127 else 128 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; 129 130 /* Stop Rx DMA */ 131 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); 132 133 /* Reset driver's Rx queue write idx */ 134 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); 135 136 /* Tell device where to find RBD circular buffer in DRAM */ 137 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8)); 138 139 /* Tell device where in DRAM to update its Rx status */ 140 il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4); 141 142 /* Enable Rx DMA 143 * Direct rx interrupts to hosts 144 * Rx buffer size 4 or 8k 145 * RB timeout 0x10 146 * 256 RBDs 147 */ 148 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 149 FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | 150 FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | 151 FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | 152 rb_size | 153 (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) | 154 (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); 155 156 /* Set interrupt coalescing timer to default (2048 usecs) */ 157 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF); 158 159 return 0; 160 } 161 162 static void 163 il4965_set_pwr_vmain(struct il_priv *il) 164 { 165 /* 166 * (for documentation purposes) 167 * to set power to V_AUX, do: 168 169 if (pci_pme_capable(il->pci_dev, PCI_D3cold)) 170 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, 171 APMG_PS_CTRL_VAL_PWR_SRC_VAUX, 172 ~APMG_PS_CTRL_MSK_PWR_SRC); 173 */ 174 175 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, 176 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, 177 ~APMG_PS_CTRL_MSK_PWR_SRC); 178 } 179 180 int 181 il4965_hw_nic_init(struct il_priv *il) 182 { 183 unsigned long flags; 184 struct il_rx_queue *rxq = &il->rxq; 185 int ret; 186 187 spin_lock_irqsave(&il->lock, flags); 188 il_apm_init(il); 189 /* Set interrupt coalescing calibration timer to default (512 usecs) */ 190 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF); 191 spin_unlock_irqrestore(&il->lock, flags); 192 193 il4965_set_pwr_vmain(il); 194 il4965_nic_config(il); 195 196 /* Allocate the RX queue, or reset if it is already allocated */ 197 if (!rxq->bd) { 198 ret = il_rx_queue_alloc(il); 199 if (ret) { 200 IL_ERR("Unable to initialize Rx queue\n"); 201 return -ENOMEM; 202 } 203 } else 204 il4965_rx_queue_reset(il, rxq); 205 206 il4965_rx_replenish(il); 207 208 il4965_rx_init(il, rxq); 209 210 spin_lock_irqsave(&il->lock, flags); 211 212 rxq->need_update = 1; 213 il_rx_queue_update_write_ptr(il, rxq); 214 215 spin_unlock_irqrestore(&il->lock, flags); 216 217 /* Allocate or reset and init all Tx and Command queues */ 218 if (!il->txq) { 219 ret = il4965_txq_ctx_alloc(il); 220 if (ret) 221 return ret; 222 } else 223 il4965_txq_ctx_reset(il); 224 225 set_bit(S_INIT, &il->status); 226 227 return 0; 228 } 229 230 /* 231 * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr 232 */ 233 static inline __le32 234 il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr) 235 { 236 return cpu_to_le32((u32) (dma_addr >> 8)); 237 } 238 239 /* 240 * il4965_rx_queue_restock - refill RX queue from pre-allocated pool 241 * 242 * If there are slots in the RX queue that need to be restocked, 243 * and we have free pre-allocated buffers, fill the ranks as much 244 * as we can, pulling from rx_free. 245 * 246 * This moves the 'write' idx forward to catch up with 'processed', and 247 * also updates the memory address in the firmware to reference the new 248 * target buffer. 249 */ 250 void 251 il4965_rx_queue_restock(struct il_priv *il) 252 { 253 struct il_rx_queue *rxq = &il->rxq; 254 struct list_head *element; 255 struct il_rx_buf *rxb; 256 unsigned long flags; 257 258 spin_lock_irqsave(&rxq->lock, flags); 259 while (il_rx_queue_space(rxq) > 0 && rxq->free_count) { 260 /* The overwritten rxb must be a used one */ 261 rxb = rxq->queue[rxq->write]; 262 BUG_ON(rxb && rxb->page); 263 264 /* Get next free Rx buffer, remove from free list */ 265 element = rxq->rx_free.next; 266 rxb = list_entry(element, struct il_rx_buf, list); 267 list_del(element); 268 269 /* Point to Rx buffer via next RBD in circular buffer */ 270 rxq->bd[rxq->write] = 271 il4965_dma_addr2rbd_ptr(il, rxb->page_dma); 272 rxq->queue[rxq->write] = rxb; 273 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; 274 rxq->free_count--; 275 } 276 spin_unlock_irqrestore(&rxq->lock, flags); 277 /* If the pre-allocated buffer pool is dropping low, schedule to 278 * refill it */ 279 if (rxq->free_count <= RX_LOW_WATERMARK) 280 queue_work(il->workqueue, &il->rx_replenish); 281 282 /* If we've added more space for the firmware to place data, tell it. 283 * Increment device's write pointer in multiples of 8. */ 284 if (rxq->write_actual != (rxq->write & ~0x7)) { 285 spin_lock_irqsave(&rxq->lock, flags); 286 rxq->need_update = 1; 287 spin_unlock_irqrestore(&rxq->lock, flags); 288 il_rx_queue_update_write_ptr(il, rxq); 289 } 290 } 291 292 /* 293 * il4965_rx_replenish - Move all used packet from rx_used to rx_free 294 * 295 * When moving to rx_free an SKB is allocated for the slot. 296 * 297 * Also restock the Rx queue via il_rx_queue_restock. 298 * This is called as a scheduled work item (except for during initialization) 299 */ 300 static void 301 il4965_rx_allocate(struct il_priv *il, gfp_t priority) 302 { 303 struct il_rx_queue *rxq = &il->rxq; 304 struct list_head *element; 305 struct il_rx_buf *rxb; 306 struct page *page; 307 dma_addr_t page_dma; 308 unsigned long flags; 309 gfp_t gfp_mask = priority; 310 311 while (1) { 312 spin_lock_irqsave(&rxq->lock, flags); 313 if (list_empty(&rxq->rx_used)) { 314 spin_unlock_irqrestore(&rxq->lock, flags); 315 return; 316 } 317 spin_unlock_irqrestore(&rxq->lock, flags); 318 319 if (rxq->free_count > RX_LOW_WATERMARK) 320 gfp_mask |= __GFP_NOWARN; 321 322 if (il->hw_params.rx_page_order > 0) 323 gfp_mask |= __GFP_COMP; 324 325 /* Alloc a new receive buffer */ 326 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order); 327 if (!page) { 328 if (net_ratelimit()) 329 D_INFO("alloc_pages failed, " "order: %d\n", 330 il->hw_params.rx_page_order); 331 332 if (rxq->free_count <= RX_LOW_WATERMARK && 333 net_ratelimit()) 334 IL_ERR("Failed to alloc_pages with %s. " 335 "Only %u free buffers remaining.\n", 336 priority == 337 GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL", 338 rxq->free_count); 339 /* We don't reschedule replenish work here -- we will 340 * call the restock method and if it still needs 341 * more buffers it will schedule replenish */ 342 return; 343 } 344 345 /* Get physical address of the RB */ 346 page_dma = dma_map_page(&il->pci_dev->dev, page, 0, 347 PAGE_SIZE << il->hw_params.rx_page_order, 348 DMA_FROM_DEVICE); 349 if (unlikely(dma_mapping_error(&il->pci_dev->dev, page_dma))) { 350 __free_pages(page, il->hw_params.rx_page_order); 351 break; 352 } 353 354 spin_lock_irqsave(&rxq->lock, flags); 355 356 if (list_empty(&rxq->rx_used)) { 357 spin_unlock_irqrestore(&rxq->lock, flags); 358 dma_unmap_page(&il->pci_dev->dev, page_dma, 359 PAGE_SIZE << il->hw_params.rx_page_order, 360 DMA_FROM_DEVICE); 361 __free_pages(page, il->hw_params.rx_page_order); 362 return; 363 } 364 365 element = rxq->rx_used.next; 366 rxb = list_entry(element, struct il_rx_buf, list); 367 list_del(element); 368 369 BUG_ON(rxb->page); 370 371 rxb->page = page; 372 rxb->page_dma = page_dma; 373 list_add_tail(&rxb->list, &rxq->rx_free); 374 rxq->free_count++; 375 il->alloc_rxb_page++; 376 377 spin_unlock_irqrestore(&rxq->lock, flags); 378 } 379 } 380 381 void 382 il4965_rx_replenish(struct il_priv *il) 383 { 384 unsigned long flags; 385 386 il4965_rx_allocate(il, GFP_KERNEL); 387 388 spin_lock_irqsave(&il->lock, flags); 389 il4965_rx_queue_restock(il); 390 spin_unlock_irqrestore(&il->lock, flags); 391 } 392 393 void 394 il4965_rx_replenish_now(struct il_priv *il) 395 { 396 il4965_rx_allocate(il, GFP_ATOMIC); 397 398 il4965_rx_queue_restock(il); 399 } 400 401 /* Assumes that the skb field of the buffers in 'pool' is kept accurate. 402 * If an SKB has been detached, the POOL needs to have its SKB set to NULL 403 * This free routine walks the list of POOL entries and if SKB is set to 404 * non NULL it is unmapped and freed 405 */ 406 void 407 il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq) 408 { 409 int i; 410 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { 411 if (rxq->pool[i].page != NULL) { 412 dma_unmap_page(&il->pci_dev->dev, 413 rxq->pool[i].page_dma, 414 PAGE_SIZE << il->hw_params.rx_page_order, 415 DMA_FROM_DEVICE); 416 __il_free_pages(il, rxq->pool[i].page); 417 rxq->pool[i].page = NULL; 418 } 419 } 420 421 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, 422 rxq->bd_dma); 423 dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status), 424 rxq->rb_stts, rxq->rb_stts_dma); 425 rxq->bd = NULL; 426 rxq->rb_stts = NULL; 427 } 428 429 int 430 il4965_rxq_stop(struct il_priv *il) 431 { 432 int ret; 433 434 _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); 435 ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG, 436 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 437 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 438 1000); 439 if (ret < 0) 440 IL_ERR("Can't stop Rx DMA.\n"); 441 442 return 0; 443 } 444 445 int 446 il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band) 447 { 448 int idx = 0; 449 int band_offset = 0; 450 451 /* HT rate format: mac80211 wants an MCS number, which is just LSB */ 452 if (rate_n_flags & RATE_MCS_HT_MSK) { 453 idx = (rate_n_flags & 0xff); 454 return idx; 455 /* Legacy rate format, search for match in table */ 456 } else { 457 if (band == NL80211_BAND_5GHZ) 458 band_offset = IL_FIRST_OFDM_RATE; 459 for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++) 460 if (il_rates[idx].plcp == (rate_n_flags & 0xFF)) 461 return idx - band_offset; 462 } 463 464 return -1; 465 } 466 467 static int 468 il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp) 469 { 470 /* data from PHY/DSP regarding signal strength, etc., 471 * contents are always there, not configurable by host. */ 472 struct il4965_rx_non_cfg_phy *ncphy = 473 (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf; 474 u32 agc = 475 (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >> 476 IL49_AGC_DB_POS; 477 478 u32 valid_antennae = 479 (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK) 480 >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET; 481 u8 max_rssi = 0; 482 u32 i; 483 484 /* Find max rssi among 3 possible receivers. 485 * These values are measured by the digital signal processor (DSP). 486 * They should stay fairly constant even as the signal strength varies, 487 * if the radio's automatic gain control (AGC) is working right. 488 * AGC value (see below) will provide the "interesting" info. */ 489 for (i = 0; i < 3; i++) 490 if (valid_antennae & (1 << i)) 491 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi); 492 493 D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n", 494 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4], 495 max_rssi, agc); 496 497 /* dBm = max_rssi dB - agc dB - constant. 498 * Higher AGC (higher radio gain) means lower signal. */ 499 return max_rssi - agc - IL4965_RSSI_OFFSET; 500 } 501 502 static u32 503 il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in) 504 { 505 u32 decrypt_out = 0; 506 507 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == 508 RX_RES_STATUS_STATION_FOUND) 509 decrypt_out |= 510 (RX_RES_STATUS_STATION_FOUND | 511 RX_RES_STATUS_NO_STATION_INFO_MISMATCH); 512 513 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); 514 515 /* packet was not encrypted */ 516 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == 517 RX_RES_STATUS_SEC_TYPE_NONE) 518 return decrypt_out; 519 520 /* packet was encrypted with unknown alg */ 521 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == 522 RX_RES_STATUS_SEC_TYPE_ERR) 523 return decrypt_out; 524 525 /* decryption was not done in HW */ 526 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != 527 RX_MPDU_RES_STATUS_DEC_DONE_MSK) 528 return decrypt_out; 529 530 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { 531 532 case RX_RES_STATUS_SEC_TYPE_CCMP: 533 /* alg is CCM: check MIC only */ 534 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) 535 /* Bad MIC */ 536 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; 537 else 538 decrypt_out |= RX_RES_STATUS_DECRYPT_OK; 539 540 break; 541 542 case RX_RES_STATUS_SEC_TYPE_TKIP: 543 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { 544 /* Bad TTAK */ 545 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; 546 break; 547 } 548 fallthrough; /* if TTAK OK */ 549 default: 550 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) 551 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; 552 else 553 decrypt_out |= RX_RES_STATUS_DECRYPT_OK; 554 break; 555 } 556 557 D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out); 558 559 return decrypt_out; 560 } 561 562 #define SMALL_PACKET_SIZE 256 563 564 static void 565 il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr, 566 u32 len, u32 ampdu_status, struct il_rx_buf *rxb, 567 struct ieee80211_rx_status *stats) 568 { 569 struct sk_buff *skb; 570 __le16 fc = hdr->frame_control; 571 572 /* We only process data packets if the interface is open */ 573 if (unlikely(!il->is_open)) { 574 D_DROP("Dropping packet while interface is not open.\n"); 575 return; 576 } 577 578 if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) { 579 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE); 580 D_INFO("Woke queues - frame received on passive channel\n"); 581 } 582 583 /* In case of HW accelerated crypto and bad decryption, drop */ 584 if (!il->cfg->mod_params->sw_crypto && 585 il_set_decrypted_flag(il, hdr, ampdu_status, stats)) 586 return; 587 588 skb = dev_alloc_skb(SMALL_PACKET_SIZE); 589 if (!skb) { 590 IL_ERR("dev_alloc_skb failed\n"); 591 return; 592 } 593 594 if (len <= SMALL_PACKET_SIZE) { 595 skb_put_data(skb, hdr, len); 596 } else { 597 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), 598 len, PAGE_SIZE << il->hw_params.rx_page_order); 599 il->alloc_rxb_page--; 600 rxb->page = NULL; 601 } 602 603 il_update_stats(il, false, fc, len); 604 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); 605 606 ieee80211_rx(il->hw, skb); 607 } 608 609 /* Called for N_RX (legacy ABG frames), or 610 * N_RX_MPDU (HT high-throughput N frames). */ 611 static void 612 il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb) 613 { 614 struct ieee80211_hdr *header; 615 struct ieee80211_rx_status rx_status = {}; 616 struct il_rx_pkt *pkt = rxb_addr(rxb); 617 struct il_rx_phy_res *phy_res; 618 __le32 rx_pkt_status; 619 struct il_rx_mpdu_res_start *amsdu; 620 u32 len; 621 u32 ampdu_status; 622 u32 rate_n_flags; 623 624 /** 625 * N_RX and N_RX_MPDU are handled differently. 626 * N_RX: physical layer info is in this buffer 627 * N_RX_MPDU: physical layer info was sent in separate 628 * command and cached in il->last_phy_res 629 * 630 * Here we set up local variables depending on which command is 631 * received. 632 */ 633 if (pkt->hdr.cmd == N_RX) { 634 phy_res = (struct il_rx_phy_res *)pkt->u.raw; 635 header = 636 (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) + 637 phy_res->cfg_phy_cnt); 638 639 len = le16_to_cpu(phy_res->byte_count); 640 rx_pkt_status = 641 *(__le32 *) (pkt->u.raw + sizeof(*phy_res) + 642 phy_res->cfg_phy_cnt + len); 643 ampdu_status = le32_to_cpu(rx_pkt_status); 644 } else { 645 if (!il->_4965.last_phy_res_valid) { 646 IL_ERR("MPDU frame without cached PHY data\n"); 647 return; 648 } 649 phy_res = &il->_4965.last_phy_res; 650 amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw; 651 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); 652 len = le16_to_cpu(amsdu->byte_count); 653 rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len); 654 ampdu_status = 655 il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status)); 656 } 657 658 if ((unlikely(phy_res->cfg_phy_cnt > 20))) { 659 D_DROP("dsp size out of range [0,20]: %d\n", 660 phy_res->cfg_phy_cnt); 661 return; 662 } 663 664 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || 665 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { 666 D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status)); 667 return; 668 } 669 670 /* This will be used in several places later */ 671 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); 672 673 /* rx_status carries information about the packet to mac80211 */ 674 rx_status.mactime = le64_to_cpu(phy_res->timestamp); 675 rx_status.band = 676 (phy_res-> 677 phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ : 678 NL80211_BAND_5GHZ; 679 rx_status.freq = 680 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel), 681 rx_status.band); 682 rx_status.rate_idx = 683 il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); 684 rx_status.flag = 0; 685 686 /* TSF isn't reliable. In order to allow smooth user experience, 687 * this W/A doesn't propagate it to the mac80211 */ 688 /*rx_status.flag |= RX_FLAG_MACTIME_START; */ 689 690 il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp); 691 692 /* Find max signal strength (dBm) among 3 antenna/receiver chains */ 693 rx_status.signal = il4965_calc_rssi(il, phy_res); 694 695 D_STATS("Rssi %d, TSF %llu\n", rx_status.signal, 696 (unsigned long long)rx_status.mactime); 697 698 /* 699 * "antenna number" 700 * 701 * It seems that the antenna field in the phy flags value 702 * is actually a bit field. This is undefined by radiotap, 703 * it wants an actual antenna number but I always get "7" 704 * for most legacy frames I receive indicating that the 705 * same frame was received on all three RX chains. 706 * 707 * I think this field should be removed in favor of a 708 * new 802.11n radiotap field "RX chains" that is defined 709 * as a bitmask. 710 */ 711 rx_status.antenna = 712 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 713 RX_RES_PHY_FLAGS_ANTENNA_POS; 714 715 /* set the preamble flag if appropriate */ 716 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) 717 rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE; 718 719 /* Set up the HT phy flags */ 720 if (rate_n_flags & RATE_MCS_HT_MSK) 721 rx_status.encoding = RX_ENC_HT; 722 if (rate_n_flags & RATE_MCS_HT40_MSK) 723 rx_status.bw = RATE_INFO_BW_40; 724 else 725 rx_status.bw = RATE_INFO_BW_20; 726 if (rate_n_flags & RATE_MCS_SGI_MSK) 727 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI; 728 729 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) { 730 /* We know which subframes of an A-MPDU belong 731 * together since we get a single PHY response 732 * from the firmware for all of them. 733 */ 734 735 rx_status.flag |= RX_FLAG_AMPDU_DETAILS; 736 rx_status.ampdu_reference = il->_4965.ampdu_ref; 737 } 738 739 il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb, 740 &rx_status); 741 } 742 743 /* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY). 744 * This will be used later in il_hdl_rx() for N_RX_MPDU. */ 745 static void 746 il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb) 747 { 748 struct il_rx_pkt *pkt = rxb_addr(rxb); 749 il->_4965.last_phy_res_valid = true; 750 il->_4965.ampdu_ref++; 751 memcpy(&il->_4965.last_phy_res, pkt->u.raw, 752 sizeof(struct il_rx_phy_res)); 753 } 754 755 static int 756 il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif, 757 enum nl80211_band band, u8 is_active, 758 u8 n_probes, struct il_scan_channel *scan_ch) 759 { 760 struct ieee80211_channel *chan; 761 const struct ieee80211_supported_band *sband; 762 const struct il_channel_info *ch_info; 763 u16 passive_dwell = 0; 764 u16 active_dwell = 0; 765 int added, i; 766 u16 channel; 767 768 sband = il_get_hw_mode(il, band); 769 if (!sband) 770 return 0; 771 772 active_dwell = il_get_active_dwell_time(il, band, n_probes); 773 passive_dwell = il_get_passive_dwell_time(il, band, vif); 774 775 if (passive_dwell <= active_dwell) 776 passive_dwell = active_dwell + 1; 777 778 for (i = 0, added = 0; i < il->scan_request->n_channels; i++) { 779 chan = il->scan_request->channels[i]; 780 781 if (chan->band != band) 782 continue; 783 784 channel = chan->hw_value; 785 scan_ch->channel = cpu_to_le16(channel); 786 787 ch_info = il_get_channel_info(il, band, channel); 788 if (!il_is_channel_valid(ch_info)) { 789 D_SCAN("Channel %d is INVALID for this band.\n", 790 channel); 791 continue; 792 } 793 794 if (!is_active || il_is_channel_passive(ch_info) || 795 (chan->flags & IEEE80211_CHAN_NO_IR)) 796 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; 797 else 798 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; 799 800 if (n_probes) 801 scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes); 802 803 scan_ch->active_dwell = cpu_to_le16(active_dwell); 804 scan_ch->passive_dwell = cpu_to_le16(passive_dwell); 805 806 /* Set txpower levels to defaults */ 807 scan_ch->dsp_atten = 110; 808 809 /* NOTE: if we were doing 6Mb OFDM for scans we'd use 810 * power level: 811 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; 812 */ 813 if (band == NL80211_BAND_5GHZ) 814 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; 815 else 816 scan_ch->tx_gain = ((1 << 5) | (5 << 3)); 817 818 D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel, 819 le32_to_cpu(scan_ch->type), 820 (scan_ch-> 821 type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE", 822 (scan_ch-> 823 type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell : 824 passive_dwell); 825 826 scan_ch++; 827 added++; 828 } 829 830 D_SCAN("total channels to scan %d\n", added); 831 return added; 832 } 833 834 static void 835 il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid) 836 { 837 int i; 838 u8 ind = *ant; 839 840 for (i = 0; i < RATE_ANT_NUM - 1; i++) { 841 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0; 842 if (valid & BIT(ind)) { 843 *ant = ind; 844 return; 845 } 846 } 847 } 848 849 int 850 il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif) 851 { 852 struct il_host_cmd cmd = { 853 .id = C_SCAN, 854 .len = sizeof(struct il_scan_cmd), 855 .flags = CMD_SIZE_HUGE, 856 }; 857 struct il_scan_cmd *scan; 858 u32 rate_flags = 0; 859 u16 cmd_len; 860 u16 rx_chain = 0; 861 enum nl80211_band band; 862 u8 n_probes = 0; 863 u8 rx_ant = il->hw_params.valid_rx_ant; 864 u8 rate; 865 bool is_active = false; 866 int chan_mod; 867 u8 active_chains; 868 u8 scan_tx_antennas = il->hw_params.valid_tx_ant; 869 int ret; 870 871 lockdep_assert_held(&il->mutex); 872 873 if (!il->scan_cmd) { 874 il->scan_cmd = 875 kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE, 876 GFP_KERNEL); 877 if (!il->scan_cmd) { 878 D_SCAN("fail to allocate memory for scan\n"); 879 return -ENOMEM; 880 } 881 } 882 scan = il->scan_cmd; 883 memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE); 884 885 scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH; 886 scan->quiet_time = IL_ACTIVE_QUIET_TIME; 887 888 if (il_is_any_associated(il)) { 889 u16 interval; 890 u32 extra; 891 u32 suspend_time = 100; 892 u32 scan_suspend_time = 100; 893 894 D_INFO("Scanning while associated...\n"); 895 interval = vif->bss_conf.beacon_int; 896 897 scan->suspend_time = 0; 898 scan->max_out_time = cpu_to_le32(200 * 1024); 899 if (!interval) 900 interval = suspend_time; 901 902 extra = (suspend_time / interval) << 22; 903 scan_suspend_time = 904 (extra | ((suspend_time % interval) * 1024)); 905 scan->suspend_time = cpu_to_le32(scan_suspend_time); 906 D_SCAN("suspend_time 0x%X beacon interval %d\n", 907 scan_suspend_time, interval); 908 } 909 910 if (il->scan_request->n_ssids) { 911 int i, p = 0; 912 D_SCAN("Kicking off active scan\n"); 913 for (i = 0; i < il->scan_request->n_ssids; i++) { 914 /* always does wildcard anyway */ 915 if (!il->scan_request->ssids[i].ssid_len) 916 continue; 917 scan->direct_scan[p].id = WLAN_EID_SSID; 918 scan->direct_scan[p].len = 919 il->scan_request->ssids[i].ssid_len; 920 memcpy(scan->direct_scan[p].ssid, 921 il->scan_request->ssids[i].ssid, 922 il->scan_request->ssids[i].ssid_len); 923 n_probes++; 924 p++; 925 } 926 is_active = true; 927 } else 928 D_SCAN("Start passive scan.\n"); 929 930 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; 931 scan->tx_cmd.sta_id = il->hw_params.bcast_id; 932 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 933 934 switch (il->scan_band) { 935 case NL80211_BAND_2GHZ: 936 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; 937 chan_mod = 938 le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >> 939 RXON_FLG_CHANNEL_MODE_POS; 940 if (chan_mod == CHANNEL_MODE_PURE_40) { 941 rate = RATE_6M_PLCP; 942 } else { 943 rate = RATE_1M_PLCP; 944 rate_flags = RATE_MCS_CCK_MSK; 945 } 946 break; 947 case NL80211_BAND_5GHZ: 948 rate = RATE_6M_PLCP; 949 break; 950 default: 951 IL_WARN("Invalid scan band\n"); 952 return -EIO; 953 } 954 955 /* 956 * If active scanning is requested but a certain channel is 957 * marked passive, we can do active scanning if we detect 958 * transmissions. 959 * 960 * There is an issue with some firmware versions that triggers 961 * a sysassert on a "good CRC threshold" of zero (== disabled), 962 * on a radar channel even though this means that we should NOT 963 * send probes. 964 * 965 * The "good CRC threshold" is the number of frames that we 966 * need to receive during our dwell time on a channel before 967 * sending out probes -- setting this to a huge value will 968 * mean we never reach it, but at the same time work around 969 * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER 970 * here instead of IL_GOOD_CRC_TH_DISABLED. 971 */ 972 scan->good_CRC_th = 973 is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER; 974 975 band = il->scan_band; 976 977 if (il->cfg->scan_rx_antennas[band]) 978 rx_ant = il->cfg->scan_rx_antennas[band]; 979 980 il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas); 981 rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS; 982 scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags); 983 984 /* In power save mode use one chain, otherwise use all chains */ 985 if (test_bit(S_POWER_PMI, &il->status)) { 986 /* rx_ant has been set to all valid chains previously */ 987 active_chains = 988 rx_ant & ((u8) (il->chain_noise_data.active_chains)); 989 if (!active_chains) 990 active_chains = rx_ant; 991 992 D_SCAN("chain_noise_data.active_chains: %u\n", 993 il->chain_noise_data.active_chains); 994 995 rx_ant = il4965_first_antenna(active_chains); 996 } 997 998 /* MIMO is not used here, but value is required */ 999 rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; 1000 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; 1001 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; 1002 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; 1003 scan->rx_chain = cpu_to_le16(rx_chain); 1004 1005 cmd_len = 1006 il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data, 1007 vif->addr, il->scan_request->ie, 1008 il->scan_request->ie_len, 1009 IL_MAX_SCAN_SIZE - sizeof(*scan)); 1010 scan->tx_cmd.len = cpu_to_le16(cmd_len); 1011 1012 scan->filter_flags |= 1013 (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK); 1014 1015 scan->channel_count = 1016 il4965_get_channels_for_scan(il, vif, band, is_active, n_probes, 1017 (void *)&scan->data[cmd_len]); 1018 if (scan->channel_count == 0) { 1019 D_SCAN("channel count %d\n", scan->channel_count); 1020 return -EIO; 1021 } 1022 1023 cmd.len += 1024 le16_to_cpu(scan->tx_cmd.len) + 1025 scan->channel_count * sizeof(struct il_scan_channel); 1026 cmd.data = scan; 1027 scan->len = cpu_to_le16(cmd.len); 1028 1029 set_bit(S_SCAN_HW, &il->status); 1030 1031 ret = il_send_cmd_sync(il, &cmd); 1032 if (ret) 1033 clear_bit(S_SCAN_HW, &il->status); 1034 1035 return ret; 1036 } 1037 1038 int 1039 il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif, 1040 bool add) 1041 { 1042 struct il_vif_priv *vif_priv = (void *)vif->drv_priv; 1043 1044 if (add) 1045 return il4965_add_bssid_station(il, vif->bss_conf.bssid, 1046 &vif_priv->ibss_bssid_sta_id); 1047 return il_remove_station(il, vif_priv->ibss_bssid_sta_id, 1048 vif->bss_conf.bssid); 1049 } 1050 1051 void 1052 il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed) 1053 { 1054 lockdep_assert_held(&il->sta_lock); 1055 1056 if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed) 1057 il->stations[sta_id].tid[tid].tfds_in_queue -= freed; 1058 else { 1059 D_TX("free more than tfds_in_queue (%u:%d)\n", 1060 il->stations[sta_id].tid[tid].tfds_in_queue, freed); 1061 il->stations[sta_id].tid[tid].tfds_in_queue = 0; 1062 } 1063 } 1064 1065 #define IL_TX_QUEUE_MSK 0xfffff 1066 1067 static bool 1068 il4965_is_single_rx_stream(struct il_priv *il) 1069 { 1070 return il->current_ht_config.smps == IEEE80211_SMPS_STATIC || 1071 il->current_ht_config.single_chain_sufficient; 1072 } 1073 1074 #define IL_NUM_RX_CHAINS_MULTIPLE 3 1075 #define IL_NUM_RX_CHAINS_SINGLE 2 1076 #define IL_NUM_IDLE_CHAINS_DUAL 2 1077 #define IL_NUM_IDLE_CHAINS_SINGLE 1 1078 1079 /* 1080 * Determine how many receiver/antenna chains to use. 1081 * 1082 * More provides better reception via diversity. Fewer saves power 1083 * at the expense of throughput, but only when not in powersave to 1084 * start with. 1085 * 1086 * MIMO (dual stream) requires at least 2, but works better with 3. 1087 * This does not determine *which* chains to use, just how many. 1088 */ 1089 static int 1090 il4965_get_active_rx_chain_count(struct il_priv *il) 1091 { 1092 /* # of Rx chains to use when expecting MIMO. */ 1093 if (il4965_is_single_rx_stream(il)) 1094 return IL_NUM_RX_CHAINS_SINGLE; 1095 else 1096 return IL_NUM_RX_CHAINS_MULTIPLE; 1097 } 1098 1099 /* 1100 * When we are in power saving mode, unless device support spatial 1101 * multiplexing power save, use the active count for rx chain count. 1102 */ 1103 static int 1104 il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt) 1105 { 1106 /* # Rx chains when idling, depending on SMPS mode */ 1107 switch (il->current_ht_config.smps) { 1108 case IEEE80211_SMPS_STATIC: 1109 case IEEE80211_SMPS_DYNAMIC: 1110 return IL_NUM_IDLE_CHAINS_SINGLE; 1111 case IEEE80211_SMPS_OFF: 1112 return active_cnt; 1113 default: 1114 WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps); 1115 return active_cnt; 1116 } 1117 } 1118 1119 /* up to 4 chains */ 1120 static u8 1121 il4965_count_chain_bitmap(u32 chain_bitmap) 1122 { 1123 u8 res; 1124 res = (chain_bitmap & BIT(0)) >> 0; 1125 res += (chain_bitmap & BIT(1)) >> 1; 1126 res += (chain_bitmap & BIT(2)) >> 2; 1127 res += (chain_bitmap & BIT(3)) >> 3; 1128 return res; 1129 } 1130 1131 /* 1132 * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image 1133 * 1134 * Selects how many and which Rx receivers/antennas/chains to use. 1135 * This should not be used for scan command ... it puts data in wrong place. 1136 */ 1137 void 1138 il4965_set_rxon_chain(struct il_priv *il) 1139 { 1140 bool is_single = il4965_is_single_rx_stream(il); 1141 bool is_cam = !test_bit(S_POWER_PMI, &il->status); 1142 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt; 1143 u32 active_chains; 1144 u16 rx_chain; 1145 1146 /* Tell uCode which antennas are actually connected. 1147 * Before first association, we assume all antennas are connected. 1148 * Just after first association, il4965_chain_noise_calibration() 1149 * checks which antennas actually *are* connected. */ 1150 if (il->chain_noise_data.active_chains) 1151 active_chains = il->chain_noise_data.active_chains; 1152 else 1153 active_chains = il->hw_params.valid_rx_ant; 1154 1155 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS; 1156 1157 /* How many receivers should we use? */ 1158 active_rx_cnt = il4965_get_active_rx_chain_count(il); 1159 idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt); 1160 1161 /* correct rx chain count according hw settings 1162 * and chain noise calibration 1163 */ 1164 valid_rx_cnt = il4965_count_chain_bitmap(active_chains); 1165 if (valid_rx_cnt < active_rx_cnt) 1166 active_rx_cnt = valid_rx_cnt; 1167 1168 if (valid_rx_cnt < idle_rx_cnt) 1169 idle_rx_cnt = valid_rx_cnt; 1170 1171 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS; 1172 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS; 1173 1174 il->staging.rx_chain = cpu_to_le16(rx_chain); 1175 1176 if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam) 1177 il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK; 1178 else 1179 il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK; 1180 1181 D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain, 1182 active_rx_cnt, idle_rx_cnt); 1183 1184 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 || 1185 active_rx_cnt < idle_rx_cnt); 1186 } 1187 1188 static const char * 1189 il4965_get_fh_string(int cmd) 1190 { 1191 switch (cmd) { 1192 IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG); 1193 IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG); 1194 IL_CMD(FH49_RSCSR_CHNL0_WPTR); 1195 IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG); 1196 IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG); 1197 IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG); 1198 IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); 1199 IL_CMD(FH49_TSSR_TX_STATUS_REG); 1200 IL_CMD(FH49_TSSR_TX_ERROR_REG); 1201 default: 1202 return "UNKNOWN"; 1203 } 1204 } 1205 1206 int 1207 il4965_dump_fh(struct il_priv *il, char **buf, bool display) 1208 { 1209 int i; 1210 #ifdef CONFIG_IWLEGACY_DEBUG 1211 int pos = 0; 1212 size_t bufsz = 0; 1213 #endif 1214 static const u32 fh_tbl[] = { 1215 FH49_RSCSR_CHNL0_STTS_WPTR_REG, 1216 FH49_RSCSR_CHNL0_RBDCB_BASE_REG, 1217 FH49_RSCSR_CHNL0_WPTR, 1218 FH49_MEM_RCSR_CHNL0_CONFIG_REG, 1219 FH49_MEM_RSSR_SHARED_CTRL_REG, 1220 FH49_MEM_RSSR_RX_STATUS_REG, 1221 FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, 1222 FH49_TSSR_TX_STATUS_REG, 1223 FH49_TSSR_TX_ERROR_REG 1224 }; 1225 #ifdef CONFIG_IWLEGACY_DEBUG 1226 if (display) { 1227 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; 1228 *buf = kmalloc(bufsz, GFP_KERNEL); 1229 if (!*buf) 1230 return -ENOMEM; 1231 pos += 1232 scnprintf(*buf + pos, bufsz - pos, "FH register values:\n"); 1233 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 1234 pos += 1235 scnprintf(*buf + pos, bufsz - pos, 1236 " %34s: 0X%08x\n", 1237 il4965_get_fh_string(fh_tbl[i]), 1238 il_rd(il, fh_tbl[i])); 1239 } 1240 return pos; 1241 } 1242 #endif 1243 IL_ERR("FH register values:\n"); 1244 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 1245 IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]), 1246 il_rd(il, fh_tbl[i])); 1247 } 1248 return 0; 1249 } 1250 1251 static void 1252 il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb) 1253 { 1254 struct il_rx_pkt *pkt = rxb_addr(rxb); 1255 struct il_missed_beacon_notif *missed_beacon; 1256 1257 missed_beacon = &pkt->u.missed_beacon; 1258 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) > 1259 il->missed_beacon_threshold) { 1260 D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n", 1261 le32_to_cpu(missed_beacon->consecutive_missed_beacons), 1262 le32_to_cpu(missed_beacon->total_missed_becons), 1263 le32_to_cpu(missed_beacon->num_recvd_beacons), 1264 le32_to_cpu(missed_beacon->num_expected_beacons)); 1265 if (!test_bit(S_SCANNING, &il->status)) 1266 il4965_init_sensitivity(il); 1267 } 1268 } 1269 1270 /* Calculate noise level, based on measurements during network silence just 1271 * before arriving beacon. This measurement can be done only if we know 1272 * exactly when to expect beacons, therefore only when we're associated. */ 1273 static void 1274 il4965_rx_calc_noise(struct il_priv *il) 1275 { 1276 struct stats_rx_non_phy *rx_info; 1277 int num_active_rx = 0; 1278 int total_silence = 0; 1279 int bcn_silence_a, bcn_silence_b, bcn_silence_c; 1280 int last_rx_noise; 1281 1282 rx_info = &(il->_4965.stats.rx.general); 1283 bcn_silence_a = 1284 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; 1285 bcn_silence_b = 1286 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; 1287 bcn_silence_c = 1288 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; 1289 1290 if (bcn_silence_a) { 1291 total_silence += bcn_silence_a; 1292 num_active_rx++; 1293 } 1294 if (bcn_silence_b) { 1295 total_silence += bcn_silence_b; 1296 num_active_rx++; 1297 } 1298 if (bcn_silence_c) { 1299 total_silence += bcn_silence_c; 1300 num_active_rx++; 1301 } 1302 1303 /* Average among active antennas */ 1304 if (num_active_rx) 1305 last_rx_noise = (total_silence / num_active_rx) - 107; 1306 else 1307 last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE; 1308 1309 D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a, 1310 bcn_silence_b, bcn_silence_c, last_rx_noise); 1311 } 1312 1313 #ifdef CONFIG_IWLEGACY_DEBUGFS 1314 /* 1315 * based on the assumption of all stats counter are in DWORD 1316 * FIXME: This function is for debugging, do not deal with 1317 * the case of counters roll-over. 1318 */ 1319 static void 1320 il4965_accumulative_stats(struct il_priv *il, __le32 * stats) 1321 { 1322 int i, size; 1323 __le32 *prev_stats; 1324 u32 *accum_stats; 1325 u32 *delta, *max_delta; 1326 struct stats_general_common *general, *accum_general; 1327 1328 prev_stats = (__le32 *) &il->_4965.stats; 1329 accum_stats = (u32 *) &il->_4965.accum_stats; 1330 size = sizeof(struct il_notif_stats); 1331 general = &il->_4965.stats.general.common; 1332 accum_general = &il->_4965.accum_stats.general.common; 1333 delta = (u32 *) &il->_4965.delta_stats; 1334 max_delta = (u32 *) &il->_4965.max_delta; 1335 1336 for (i = sizeof(__le32); i < size; 1337 i += 1338 sizeof(__le32), stats++, prev_stats++, delta++, max_delta++, 1339 accum_stats++) { 1340 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) { 1341 *delta = 1342 (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats)); 1343 *accum_stats += *delta; 1344 if (*delta > *max_delta) 1345 *max_delta = *delta; 1346 } 1347 } 1348 1349 /* reset accumulative stats for "no-counter" type stats */ 1350 accum_general->temperature = general->temperature; 1351 accum_general->ttl_timestamp = general->ttl_timestamp; 1352 } 1353 #endif 1354 1355 static void 1356 il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb) 1357 { 1358 const int recalib_seconds = 60; 1359 bool change; 1360 struct il_rx_pkt *pkt = rxb_addr(rxb); 1361 1362 D_RX("Statistics notification received (%d vs %d).\n", 1363 (int)sizeof(struct il_notif_stats), 1364 le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK); 1365 1366 change = 1367 ((il->_4965.stats.general.common.temperature != 1368 pkt->u.stats.general.common.temperature) || 1369 ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) != 1370 (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK))); 1371 #ifdef CONFIG_IWLEGACY_DEBUGFS 1372 il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats); 1373 #endif 1374 1375 /* TODO: reading some of stats is unneeded */ 1376 memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats)); 1377 1378 set_bit(S_STATS, &il->status); 1379 1380 /* 1381 * Reschedule the stats timer to occur in recalib_seconds to ensure 1382 * we get a thermal update even if the uCode doesn't give us one 1383 */ 1384 mod_timer(&il->stats_periodic, 1385 jiffies + msecs_to_jiffies(recalib_seconds * 1000)); 1386 1387 if (unlikely(!test_bit(S_SCANNING, &il->status)) && 1388 (pkt->hdr.cmd == N_STATS)) { 1389 il4965_rx_calc_noise(il); 1390 queue_work(il->workqueue, &il->run_time_calib_work); 1391 } 1392 1393 if (change) 1394 il4965_temperature_calib(il); 1395 } 1396 1397 static void 1398 il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb) 1399 { 1400 struct il_rx_pkt *pkt = rxb_addr(rxb); 1401 1402 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) { 1403 #ifdef CONFIG_IWLEGACY_DEBUGFS 1404 memset(&il->_4965.accum_stats, 0, 1405 sizeof(struct il_notif_stats)); 1406 memset(&il->_4965.delta_stats, 0, 1407 sizeof(struct il_notif_stats)); 1408 memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats)); 1409 #endif 1410 D_RX("Statistics have been cleared\n"); 1411 } 1412 il4965_hdl_stats(il, rxb); 1413 } 1414 1415 1416 /* 1417 * mac80211 queues, ACs, hardware queues, FIFOs. 1418 * 1419 * Cf. https://wireless.wiki.kernel.org/en/developers/Documentation/mac80211/queues 1420 * 1421 * Mac80211 uses the following numbers, which we get as from it 1422 * by way of skb_get_queue_mapping(skb): 1423 * 1424 * VO 0 1425 * VI 1 1426 * BE 2 1427 * BK 3 1428 * 1429 * 1430 * Regular (not A-MPDU) frames are put into hardware queues corresponding 1431 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their 1432 * own queue per aggregation session (RA/TID combination), such queues are 1433 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In 1434 * order to map frames to the right queue, we also need an AC->hw queue 1435 * mapping. This is implemented here. 1436 * 1437 * Due to the way hw queues are set up (by the hw specific modules like 1438 * 4965.c), the AC->hw queue mapping is the identity 1439 * mapping. 1440 */ 1441 1442 static const u8 tid_to_ac[] = { 1443 IEEE80211_AC_BE, 1444 IEEE80211_AC_BK, 1445 IEEE80211_AC_BK, 1446 IEEE80211_AC_BE, 1447 IEEE80211_AC_VI, 1448 IEEE80211_AC_VI, 1449 IEEE80211_AC_VO, 1450 IEEE80211_AC_VO 1451 }; 1452 1453 static inline int 1454 il4965_get_ac_from_tid(u16 tid) 1455 { 1456 if (likely(tid < ARRAY_SIZE(tid_to_ac))) 1457 return tid_to_ac[tid]; 1458 1459 /* no support for TIDs 8-15 yet */ 1460 return -EINVAL; 1461 } 1462 1463 static inline int 1464 il4965_get_fifo_from_tid(u16 tid) 1465 { 1466 static const u8 ac_to_fifo[] = { 1467 IL_TX_FIFO_VO, 1468 IL_TX_FIFO_VI, 1469 IL_TX_FIFO_BE, 1470 IL_TX_FIFO_BK, 1471 }; 1472 1473 if (likely(tid < ARRAY_SIZE(tid_to_ac))) 1474 return ac_to_fifo[tid_to_ac[tid]]; 1475 1476 /* no support for TIDs 8-15 yet */ 1477 return -EINVAL; 1478 } 1479 1480 /* 1481 * handle build C_TX command notification. 1482 */ 1483 static void 1484 il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb, 1485 struct il_tx_cmd *tx_cmd, 1486 struct ieee80211_tx_info *info, 1487 struct ieee80211_hdr *hdr, u8 std_id) 1488 { 1489 __le16 fc = hdr->frame_control; 1490 __le32 tx_flags = tx_cmd->tx_flags; 1491 1492 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 1493 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { 1494 tx_flags |= TX_CMD_FLG_ACK_MSK; 1495 if (ieee80211_is_mgmt(fc)) 1496 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1497 if (ieee80211_is_probe_resp(fc) && 1498 !(le16_to_cpu(hdr->seq_ctrl) & 0xf)) 1499 tx_flags |= TX_CMD_FLG_TSF_MSK; 1500 } else { 1501 tx_flags &= (~TX_CMD_FLG_ACK_MSK); 1502 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1503 } 1504 1505 if (ieee80211_is_back_req(fc)) 1506 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; 1507 1508 tx_cmd->sta_id = std_id; 1509 if (ieee80211_has_morefrags(fc)) 1510 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; 1511 1512 if (ieee80211_is_data_qos(fc)) { 1513 u8 *qc = ieee80211_get_qos_ctl(hdr); 1514 tx_cmd->tid_tspec = qc[0] & 0xf; 1515 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 1516 } else { 1517 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1518 } 1519 1520 il_tx_cmd_protection(il, info, fc, &tx_flags); 1521 1522 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); 1523 if (ieee80211_is_mgmt(fc)) { 1524 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 1525 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); 1526 else 1527 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); 1528 } else { 1529 tx_cmd->timeout.pm_frame_timeout = 0; 1530 } 1531 1532 tx_cmd->driver_txop = 0; 1533 tx_cmd->tx_flags = tx_flags; 1534 tx_cmd->next_frame_len = 0; 1535 } 1536 1537 static void 1538 il4965_tx_cmd_build_rate(struct il_priv *il, 1539 struct il_tx_cmd *tx_cmd, 1540 struct ieee80211_tx_info *info, 1541 struct ieee80211_sta *sta, 1542 __le16 fc) 1543 { 1544 const u8 rts_retry_limit = 60; 1545 u32 rate_flags; 1546 int rate_idx; 1547 u8 data_retry_limit; 1548 u8 rate_plcp; 1549 1550 /* Set retry limit on DATA packets and Probe Responses */ 1551 if (ieee80211_is_probe_resp(fc)) 1552 data_retry_limit = 3; 1553 else 1554 data_retry_limit = IL4965_DEFAULT_TX_RETRY; 1555 tx_cmd->data_retry_limit = data_retry_limit; 1556 /* Set retry limit on RTS packets */ 1557 tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit); 1558 1559 /* DATA packets will use the uCode station table for rate/antenna 1560 * selection */ 1561 if (ieee80211_is_data(fc)) { 1562 tx_cmd->initial_rate_idx = 0; 1563 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 1564 return; 1565 } 1566 1567 /** 1568 * If the current TX rate stored in mac80211 has the MCS bit set, it's 1569 * not really a TX rate. Thus, we use the lowest supported rate for 1570 * this band. Also use the lowest supported rate if the stored rate 1571 * idx is invalid. 1572 */ 1573 rate_idx = info->control.rates[0].idx; 1574 if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0 1575 || rate_idx > RATE_COUNT_LEGACY) 1576 rate_idx = rate_lowest_index(&il->bands[info->band], sta); 1577 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 1578 if (info->band == NL80211_BAND_5GHZ) 1579 rate_idx += IL_FIRST_OFDM_RATE; 1580 /* Get PLCP rate for tx_cmd->rate_n_flags */ 1581 rate_plcp = il_rates[rate_idx].plcp; 1582 /* Zero out flags for this packet */ 1583 rate_flags = 0; 1584 1585 /* Set CCK flag as needed */ 1586 if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE) 1587 rate_flags |= RATE_MCS_CCK_MSK; 1588 1589 /* Set up antennas */ 1590 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); 1591 rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; 1592 1593 /* Set the rate in the TX cmd */ 1594 tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags); 1595 } 1596 1597 static void 1598 il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info, 1599 struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag, 1600 int sta_id) 1601 { 1602 struct ieee80211_key_conf *keyconf = info->control.hw_key; 1603 1604 switch (keyconf->cipher) { 1605 case WLAN_CIPHER_SUITE_CCMP: 1606 tx_cmd->sec_ctl = TX_CMD_SEC_CCM; 1607 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); 1608 if (info->flags & IEEE80211_TX_CTL_AMPDU) 1609 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; 1610 D_TX("tx_cmd with AES hwcrypto\n"); 1611 break; 1612 1613 case WLAN_CIPHER_SUITE_TKIP: 1614 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 1615 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 1616 D_TX("tx_cmd with tkip hwcrypto\n"); 1617 break; 1618 1619 case WLAN_CIPHER_SUITE_WEP104: 1620 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 1621 fallthrough; 1622 case WLAN_CIPHER_SUITE_WEP40: 1623 tx_cmd->sec_ctl |= 1624 (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) << 1625 TX_CMD_SEC_SHIFT); 1626 1627 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 1628 1629 D_TX("Configuring packet for WEP encryption " "with key %d\n", 1630 keyconf->keyidx); 1631 break; 1632 1633 default: 1634 IL_ERR("Unknown encode cipher %x\n", keyconf->cipher); 1635 break; 1636 } 1637 } 1638 1639 /* 1640 * start C_TX command process 1641 */ 1642 int 1643 il4965_tx_skb(struct il_priv *il, 1644 struct ieee80211_sta *sta, 1645 struct sk_buff *skb) 1646 { 1647 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1648 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1649 struct il_station_priv *sta_priv = NULL; 1650 struct il_tx_queue *txq; 1651 struct il_queue *q; 1652 struct il_device_cmd *out_cmd; 1653 struct il_cmd_meta *out_meta; 1654 struct il_tx_cmd *tx_cmd; 1655 int txq_id; 1656 dma_addr_t phys_addr; 1657 dma_addr_t txcmd_phys; 1658 dma_addr_t scratch_phys; 1659 u16 len, firstlen, secondlen; 1660 u16 seq_number = 0; 1661 __le16 fc; 1662 u8 hdr_len; 1663 u8 sta_id; 1664 u8 wait_write_ptr = 0; 1665 u8 tid = 0; 1666 u8 *qc = NULL; 1667 unsigned long flags; 1668 bool is_agg = false; 1669 1670 spin_lock_irqsave(&il->lock, flags); 1671 if (il_is_rfkill(il)) { 1672 D_DROP("Dropping - RF KILL\n"); 1673 goto drop_unlock; 1674 } 1675 1676 fc = hdr->frame_control; 1677 1678 #ifdef CONFIG_IWLEGACY_DEBUG 1679 if (ieee80211_is_auth(fc)) 1680 D_TX("Sending AUTH frame\n"); 1681 else if (ieee80211_is_assoc_req(fc)) 1682 D_TX("Sending ASSOC frame\n"); 1683 else if (ieee80211_is_reassoc_req(fc)) 1684 D_TX("Sending REASSOC frame\n"); 1685 #endif 1686 1687 hdr_len = ieee80211_hdrlen(fc); 1688 1689 /* For management frames use broadcast id to do not break aggregation */ 1690 if (!ieee80211_is_data(fc)) 1691 sta_id = il->hw_params.bcast_id; 1692 else { 1693 /* Find idx into station table for destination station */ 1694 sta_id = il_sta_id_or_broadcast(il, sta); 1695 1696 if (sta_id == IL_INVALID_STATION) { 1697 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1); 1698 goto drop_unlock; 1699 } 1700 } 1701 1702 D_TX("station Id %d\n", sta_id); 1703 1704 if (sta) 1705 sta_priv = (void *)sta->drv_priv; 1706 1707 if (sta_priv && sta_priv->asleep && 1708 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { 1709 /* 1710 * This sends an asynchronous command to the device, 1711 * but we can rely on it being processed before the 1712 * next frame is processed -- and the next frame to 1713 * this station is the one that will consume this 1714 * counter. 1715 * For now set the counter to just 1 since we do not 1716 * support uAPSD yet. 1717 */ 1718 il4965_sta_modify_sleep_tx_count(il, sta_id, 1); 1719 } 1720 1721 /* FIXME: remove me ? */ 1722 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1723 1724 /* Access category (AC) is also the queue number */ 1725 txq_id = skb_get_queue_mapping(skb); 1726 1727 /* irqs already disabled/saved above when locking il->lock */ 1728 spin_lock(&il->sta_lock); 1729 1730 if (ieee80211_is_data_qos(fc)) { 1731 qc = ieee80211_get_qos_ctl(hdr); 1732 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 1733 if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) { 1734 spin_unlock(&il->sta_lock); 1735 goto drop_unlock; 1736 } 1737 seq_number = il->stations[sta_id].tid[tid].seq_number; 1738 seq_number &= IEEE80211_SCTL_SEQ; 1739 hdr->seq_ctrl = 1740 hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG); 1741 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1742 seq_number += 0x10; 1743 /* aggregation is on for this <sta,tid> */ 1744 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1745 il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) { 1746 txq_id = il->stations[sta_id].tid[tid].agg.txq_id; 1747 is_agg = true; 1748 } 1749 } 1750 1751 txq = &il->txq[txq_id]; 1752 q = &txq->q; 1753 1754 if (unlikely(il_queue_space(q) < q->high_mark)) { 1755 spin_unlock(&il->sta_lock); 1756 goto drop_unlock; 1757 } 1758 1759 if (ieee80211_is_data_qos(fc)) { 1760 il->stations[sta_id].tid[tid].tfds_in_queue++; 1761 if (!ieee80211_has_morefrags(fc)) 1762 il->stations[sta_id].tid[tid].seq_number = seq_number; 1763 } 1764 1765 spin_unlock(&il->sta_lock); 1766 1767 txq->skbs[q->write_ptr] = skb; 1768 1769 /* Set up first empty entry in queue's array of Tx/cmd buffers */ 1770 out_cmd = txq->cmd[q->write_ptr]; 1771 out_meta = &txq->meta[q->write_ptr]; 1772 tx_cmd = &out_cmd->cmd.tx; 1773 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); 1774 memset(tx_cmd, 0, sizeof(struct il_tx_cmd)); 1775 1776 /* 1777 * Set up the Tx-command (not MAC!) header. 1778 * Store the chosen Tx queue and TFD idx within the sequence field; 1779 * after Tx, uCode's Tx response will return this value so driver can 1780 * locate the frame within the tx queue and do post-tx processing. 1781 */ 1782 out_cmd->hdr.cmd = C_TX; 1783 out_cmd->hdr.sequence = 1784 cpu_to_le16((u16) 1785 (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr))); 1786 1787 /* Copy MAC header from skb into command buffer */ 1788 memcpy(tx_cmd->hdr, hdr, hdr_len); 1789 1790 /* Total # bytes to be transmitted */ 1791 tx_cmd->len = cpu_to_le16((u16) skb->len); 1792 1793 if (info->control.hw_key) 1794 il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id); 1795 1796 /* TODO need this for burst mode later on */ 1797 il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id); 1798 1799 il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc); 1800 1801 /* 1802 * Use the first empty entry in this queue's command buffer array 1803 * to contain the Tx command and MAC header concatenated together 1804 * (payload data will be in another buffer). 1805 * Size of this varies, due to varying MAC header length. 1806 * If end is not dword aligned, we'll have 2 extra bytes at the end 1807 * of the MAC header (device reads on dword boundaries). 1808 * We'll tell device about this padding later. 1809 */ 1810 len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len; 1811 firstlen = (len + 3) & ~3; 1812 1813 /* Tell NIC about any 2-byte padding after MAC header */ 1814 if (firstlen != len) 1815 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; 1816 1817 /* Physical address of this Tx command's header (not MAC header!), 1818 * within command buffer array. */ 1819 txcmd_phys = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, firstlen, 1820 DMA_BIDIRECTIONAL); 1821 if (unlikely(dma_mapping_error(&il->pci_dev->dev, txcmd_phys))) 1822 goto drop_unlock; 1823 1824 /* Set up TFD's 2nd entry to point directly to remainder of skb, 1825 * if any (802.11 null frames have no payload). */ 1826 secondlen = skb->len - hdr_len; 1827 if (secondlen > 0) { 1828 phys_addr = dma_map_single(&il->pci_dev->dev, skb->data + hdr_len, 1829 secondlen, DMA_TO_DEVICE); 1830 if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr))) 1831 goto drop_unlock; 1832 } 1833 1834 /* Add buffer containing Tx command and MAC(!) header to TFD's 1835 * first entry */ 1836 il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0); 1837 dma_unmap_addr_set(out_meta, mapping, txcmd_phys); 1838 dma_unmap_len_set(out_meta, len, firstlen); 1839 if (secondlen) 1840 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 1841 0, 0); 1842 1843 if (!ieee80211_has_morefrags(hdr->frame_control)) { 1844 txq->need_update = 1; 1845 } else { 1846 wait_write_ptr = 1; 1847 txq->need_update = 0; 1848 } 1849 1850 scratch_phys = 1851 txcmd_phys + sizeof(struct il_cmd_header) + 1852 offsetof(struct il_tx_cmd, scratch); 1853 1854 /* take back ownership of DMA buffer to enable update */ 1855 dma_sync_single_for_cpu(&il->pci_dev->dev, txcmd_phys, firstlen, 1856 DMA_BIDIRECTIONAL); 1857 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); 1858 tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys); 1859 1860 il_update_stats(il, true, fc, skb->len); 1861 1862 D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence)); 1863 D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); 1864 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd)); 1865 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len); 1866 1867 /* Set up entry for this TFD in Tx byte-count array */ 1868 if (info->flags & IEEE80211_TX_CTL_AMPDU) 1869 il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len)); 1870 1871 dma_sync_single_for_device(&il->pci_dev->dev, txcmd_phys, firstlen, 1872 DMA_BIDIRECTIONAL); 1873 1874 /* Tell device the write idx *just past* this latest filled TFD */ 1875 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd); 1876 il_txq_update_write_ptr(il, txq); 1877 spin_unlock_irqrestore(&il->lock, flags); 1878 1879 /* 1880 * At this point the frame is "transmitted" successfully 1881 * and we will get a TX status notification eventually, 1882 * regardless of the value of ret. "ret" only indicates 1883 * whether or not we should update the write pointer. 1884 */ 1885 1886 /* 1887 * Avoid atomic ops if it isn't an associated client. 1888 * Also, if this is a packet for aggregation, don't 1889 * increase the counter because the ucode will stop 1890 * aggregation queues when their respective station 1891 * goes to sleep. 1892 */ 1893 if (sta_priv && sta_priv->client && !is_agg) 1894 atomic_inc(&sta_priv->pending_frames); 1895 1896 if (il_queue_space(q) < q->high_mark && il->mac80211_registered) { 1897 if (wait_write_ptr) { 1898 spin_lock_irqsave(&il->lock, flags); 1899 txq->need_update = 1; 1900 il_txq_update_write_ptr(il, txq); 1901 spin_unlock_irqrestore(&il->lock, flags); 1902 } else { 1903 il_stop_queue(il, txq); 1904 } 1905 } 1906 1907 return 0; 1908 1909 drop_unlock: 1910 spin_unlock_irqrestore(&il->lock, flags); 1911 return -1; 1912 } 1913 1914 static inline int 1915 il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size) 1916 { 1917 ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma, 1918 GFP_KERNEL); 1919 if (!ptr->addr) 1920 return -ENOMEM; 1921 ptr->size = size; 1922 return 0; 1923 } 1924 1925 static inline void 1926 il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr) 1927 { 1928 if (unlikely(!ptr->addr)) 1929 return; 1930 1931 dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma); 1932 memset(ptr, 0, sizeof(*ptr)); 1933 } 1934 1935 /* 1936 * il4965_hw_txq_ctx_free - Free TXQ Context 1937 * 1938 * Destroy all TX DMA queues and structures 1939 */ 1940 void 1941 il4965_hw_txq_ctx_free(struct il_priv *il) 1942 { 1943 int txq_id; 1944 1945 /* Tx queues */ 1946 if (il->txq) { 1947 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 1948 if (txq_id == il->cmd_queue) 1949 il_cmd_queue_free(il); 1950 else 1951 il_tx_queue_free(il, txq_id); 1952 } 1953 il4965_free_dma_ptr(il, &il->kw); 1954 1955 il4965_free_dma_ptr(il, &il->scd_bc_tbls); 1956 1957 /* free tx queue structure */ 1958 il_free_txq_mem(il); 1959 } 1960 1961 /* 1962 * il4965_txq_ctx_alloc - allocate TX queue context 1963 * Allocate all Tx DMA structures and initialize them 1964 */ 1965 int 1966 il4965_txq_ctx_alloc(struct il_priv *il) 1967 { 1968 int ret, txq_id; 1969 unsigned long flags; 1970 1971 /* Free all tx/cmd queues and keep-warm buffer */ 1972 il4965_hw_txq_ctx_free(il); 1973 1974 ret = 1975 il4965_alloc_dma_ptr(il, &il->scd_bc_tbls, 1976 il->hw_params.scd_bc_tbls_size); 1977 if (ret) { 1978 IL_ERR("Scheduler BC Table allocation failed\n"); 1979 goto error_bc_tbls; 1980 } 1981 /* Alloc keep-warm buffer */ 1982 ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE); 1983 if (ret) { 1984 IL_ERR("Keep Warm allocation failed\n"); 1985 goto error_kw; 1986 } 1987 1988 /* allocate tx queue structure */ 1989 ret = il_alloc_txq_mem(il); 1990 if (ret) 1991 goto error; 1992 1993 spin_lock_irqsave(&il->lock, flags); 1994 1995 /* Turn off all Tx DMA fifos */ 1996 il4965_txq_set_sched(il, 0); 1997 1998 /* Tell NIC where to find the "keep warm" buffer */ 1999 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); 2000 2001 spin_unlock_irqrestore(&il->lock, flags); 2002 2003 /* Alloc and init all Tx queues, including the command queue (#4/#9) */ 2004 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) { 2005 ret = il_tx_queue_init(il, txq_id); 2006 if (ret) { 2007 IL_ERR("Tx %d queue init failed\n", txq_id); 2008 goto error; 2009 } 2010 } 2011 2012 return ret; 2013 2014 error: 2015 il4965_hw_txq_ctx_free(il); 2016 il4965_free_dma_ptr(il, &il->kw); 2017 error_kw: 2018 il4965_free_dma_ptr(il, &il->scd_bc_tbls); 2019 error_bc_tbls: 2020 return ret; 2021 } 2022 2023 void 2024 il4965_txq_ctx_reset(struct il_priv *il) 2025 { 2026 int txq_id; 2027 unsigned long flags; 2028 2029 spin_lock_irqsave(&il->lock, flags); 2030 2031 /* Turn off all Tx DMA fifos */ 2032 il4965_txq_set_sched(il, 0); 2033 /* Tell NIC where to find the "keep warm" buffer */ 2034 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); 2035 2036 spin_unlock_irqrestore(&il->lock, flags); 2037 2038 /* Alloc and init all Tx queues, including the command queue (#4) */ 2039 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2040 il_tx_queue_reset(il, txq_id); 2041 } 2042 2043 static void 2044 il4965_txq_ctx_unmap(struct il_priv *il) 2045 { 2046 int txq_id; 2047 2048 if (!il->txq) 2049 return; 2050 2051 /* Unmap DMA from host system and free skb's */ 2052 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2053 if (txq_id == il->cmd_queue) 2054 il_cmd_queue_unmap(il); 2055 else 2056 il_tx_queue_unmap(il, txq_id); 2057 } 2058 2059 /* 2060 * il4965_txq_ctx_stop - Stop all Tx DMA channels 2061 */ 2062 void 2063 il4965_txq_ctx_stop(struct il_priv *il) 2064 { 2065 int ch, ret; 2066 2067 _il_wr_prph(il, IL49_SCD_TXFACT, 0); 2068 2069 /* Stop each Tx DMA channel, and wait for it to be idle */ 2070 for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) { 2071 _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); 2072 ret = 2073 _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG, 2074 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 2075 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 2076 1000); 2077 if (ret < 0) 2078 IL_ERR("Timeout stopping DMA channel %d [0x%08x]", 2079 ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG)); 2080 } 2081 } 2082 2083 /* 2084 * Find first available (lowest unused) Tx Queue, mark it "active". 2085 * Called only when finding queue for aggregation. 2086 * Should never return anything < 7, because they should already 2087 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6) 2088 */ 2089 static int 2090 il4965_txq_ctx_activate_free(struct il_priv *il) 2091 { 2092 int txq_id; 2093 2094 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2095 if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk)) 2096 return txq_id; 2097 return -1; 2098 } 2099 2100 /* 2101 * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration 2102 */ 2103 static void 2104 il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id) 2105 { 2106 /* Simply stop the queue, but don't change any configuration; 2107 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */ 2108 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), 2109 (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | 2110 (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); 2111 } 2112 2113 /* 2114 * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue 2115 */ 2116 static int 2117 il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id) 2118 { 2119 u32 tbl_dw_addr; 2120 u32 tbl_dw; 2121 u16 scd_q2ratid; 2122 2123 scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK; 2124 2125 tbl_dw_addr = 2126 il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id); 2127 2128 tbl_dw = il_read_targ_mem(il, tbl_dw_addr); 2129 2130 if (txq_id & 0x1) 2131 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); 2132 else 2133 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); 2134 2135 il_write_targ_mem(il, tbl_dw_addr, tbl_dw); 2136 2137 return 0; 2138 } 2139 2140 /* 2141 * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue 2142 * 2143 * NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE, 2144 * i.e. it must be one of the higher queues used for aggregation 2145 */ 2146 static int 2147 il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id, 2148 int tid, u16 ssn_idx) 2149 { 2150 unsigned long flags; 2151 u16 ra_tid; 2152 int ret; 2153 2154 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || 2155 (IL49_FIRST_AMPDU_QUEUE + 2156 il->cfg->num_of_ampdu_queues <= txq_id)) { 2157 IL_WARN("queue number out of range: %d, must be %d to %d\n", 2158 txq_id, IL49_FIRST_AMPDU_QUEUE, 2159 IL49_FIRST_AMPDU_QUEUE + 2160 il->cfg->num_of_ampdu_queues - 1); 2161 return -EINVAL; 2162 } 2163 2164 ra_tid = BUILD_RAxTID(sta_id, tid); 2165 2166 /* Modify device's station table to Tx this TID */ 2167 ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid); 2168 if (ret) 2169 return ret; 2170 2171 spin_lock_irqsave(&il->lock, flags); 2172 2173 /* Stop this Tx queue before configuring it */ 2174 il4965_tx_queue_stop_scheduler(il, txq_id); 2175 2176 /* Map receiver-address / traffic-ID to this queue */ 2177 il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id); 2178 2179 /* Set this queue as a chain-building queue */ 2180 il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); 2181 2182 /* Place first TFD at idx corresponding to start sequence number. 2183 * Assumes that ssn_idx is valid (!= 0xFFF) */ 2184 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); 2185 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); 2186 il4965_set_wr_ptrs(il, txq_id, ssn_idx); 2187 2188 /* Set up Tx win size and frame limit for this queue */ 2189 il_write_targ_mem(il, 2190 il->scd_base_addr + 2191 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id), 2192 (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) 2193 & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); 2194 2195 il_write_targ_mem(il, 2196 il->scd_base_addr + 2197 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), 2198 (SCD_FRAME_LIMIT << 2199 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & 2200 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); 2201 2202 il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); 2203 2204 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */ 2205 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1); 2206 2207 spin_unlock_irqrestore(&il->lock, flags); 2208 2209 return 0; 2210 } 2211 2212 int 2213 il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif, 2214 struct ieee80211_sta *sta, u16 tid, u16 * ssn) 2215 { 2216 int sta_id; 2217 int tx_fifo; 2218 int txq_id; 2219 int ret; 2220 unsigned long flags; 2221 struct il_tid_data *tid_data; 2222 2223 /* FIXME: warning if tx fifo not found ? */ 2224 tx_fifo = il4965_get_fifo_from_tid(tid); 2225 if (unlikely(tx_fifo < 0)) 2226 return tx_fifo; 2227 2228 D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid); 2229 2230 sta_id = il_sta_id(sta); 2231 if (sta_id == IL_INVALID_STATION) { 2232 IL_ERR("Start AGG on invalid station\n"); 2233 return -ENXIO; 2234 } 2235 if (unlikely(tid >= MAX_TID_COUNT)) 2236 return -EINVAL; 2237 2238 if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) { 2239 IL_ERR("Start AGG when state is not IL_AGG_OFF !\n"); 2240 return -ENXIO; 2241 } 2242 2243 txq_id = il4965_txq_ctx_activate_free(il); 2244 if (txq_id == -1) { 2245 IL_ERR("No free aggregation queue available\n"); 2246 return -ENXIO; 2247 } 2248 2249 spin_lock_irqsave(&il->sta_lock, flags); 2250 tid_data = &il->stations[sta_id].tid[tid]; 2251 *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2252 tid_data->agg.txq_id = txq_id; 2253 il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id); 2254 spin_unlock_irqrestore(&il->sta_lock, flags); 2255 2256 ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn); 2257 if (ret) 2258 return ret; 2259 2260 spin_lock_irqsave(&il->sta_lock, flags); 2261 tid_data = &il->stations[sta_id].tid[tid]; 2262 if (tid_data->tfds_in_queue == 0) { 2263 D_HT("HW queue is empty\n"); 2264 tid_data->agg.state = IL_AGG_ON; 2265 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 2266 } else { 2267 D_HT("HW queue is NOT empty: %d packets in HW queue\n", 2268 tid_data->tfds_in_queue); 2269 tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA; 2270 } 2271 spin_unlock_irqrestore(&il->sta_lock, flags); 2272 return ret; 2273 } 2274 2275 /* 2276 * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE 2277 * il->lock must be held by the caller 2278 */ 2279 static int 2280 il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo) 2281 { 2282 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || 2283 (IL49_FIRST_AMPDU_QUEUE + 2284 il->cfg->num_of_ampdu_queues <= txq_id)) { 2285 IL_WARN("queue number out of range: %d, must be %d to %d\n", 2286 txq_id, IL49_FIRST_AMPDU_QUEUE, 2287 IL49_FIRST_AMPDU_QUEUE + 2288 il->cfg->num_of_ampdu_queues - 1); 2289 return -EINVAL; 2290 } 2291 2292 il4965_tx_queue_stop_scheduler(il, txq_id); 2293 2294 il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); 2295 2296 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); 2297 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); 2298 /* supposes that ssn_idx is valid (!= 0xFFF) */ 2299 il4965_set_wr_ptrs(il, txq_id, ssn_idx); 2300 2301 il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); 2302 il_txq_ctx_deactivate(il, txq_id); 2303 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0); 2304 2305 return 0; 2306 } 2307 2308 int 2309 il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif, 2310 struct ieee80211_sta *sta, u16 tid) 2311 { 2312 int tx_fifo_id, txq_id, sta_id, ssn; 2313 struct il_tid_data *tid_data; 2314 int write_ptr, read_ptr; 2315 unsigned long flags; 2316 2317 /* FIXME: warning if tx_fifo_id not found ? */ 2318 tx_fifo_id = il4965_get_fifo_from_tid(tid); 2319 if (unlikely(tx_fifo_id < 0)) 2320 return tx_fifo_id; 2321 2322 sta_id = il_sta_id(sta); 2323 2324 if (sta_id == IL_INVALID_STATION) { 2325 IL_ERR("Invalid station for AGG tid %d\n", tid); 2326 return -ENXIO; 2327 } 2328 2329 spin_lock_irqsave(&il->sta_lock, flags); 2330 2331 tid_data = &il->stations[sta_id].tid[tid]; 2332 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; 2333 txq_id = tid_data->agg.txq_id; 2334 2335 switch (il->stations[sta_id].tid[tid].agg.state) { 2336 case IL_EMPTYING_HW_QUEUE_ADDBA: 2337 /* 2338 * This can happen if the peer stops aggregation 2339 * again before we've had a chance to drain the 2340 * queue we selected previously, i.e. before the 2341 * session was really started completely. 2342 */ 2343 D_HT("AGG stop before setup done\n"); 2344 goto turn_off; 2345 case IL_AGG_ON: 2346 break; 2347 default: 2348 IL_WARN("Stopping AGG while state not ON or starting\n"); 2349 } 2350 2351 write_ptr = il->txq[txq_id].q.write_ptr; 2352 read_ptr = il->txq[txq_id].q.read_ptr; 2353 2354 /* The queue is not empty */ 2355 if (write_ptr != read_ptr) { 2356 D_HT("Stopping a non empty AGG HW QUEUE\n"); 2357 il->stations[sta_id].tid[tid].agg.state = 2358 IL_EMPTYING_HW_QUEUE_DELBA; 2359 spin_unlock_irqrestore(&il->sta_lock, flags); 2360 return 0; 2361 } 2362 2363 D_HT("HW queue is empty\n"); 2364 turn_off: 2365 il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF; 2366 2367 /* do not restore/save irqs */ 2368 spin_unlock(&il->sta_lock); 2369 spin_lock(&il->lock); 2370 2371 /* 2372 * the only reason this call can fail is queue number out of range, 2373 * which can happen if uCode is reloaded and all the station 2374 * information are lost. if it is outside the range, there is no need 2375 * to deactivate the uCode queue, just return "success" to allow 2376 * mac80211 to clean up it own data. 2377 */ 2378 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id); 2379 spin_unlock_irqrestore(&il->lock, flags); 2380 2381 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2382 2383 return 0; 2384 } 2385 2386 int 2387 il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id) 2388 { 2389 struct il_queue *q = &il->txq[txq_id].q; 2390 u8 *addr = il->stations[sta_id].sta.sta.addr; 2391 struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid]; 2392 2393 lockdep_assert_held(&il->sta_lock); 2394 2395 switch (il->stations[sta_id].tid[tid].agg.state) { 2396 case IL_EMPTYING_HW_QUEUE_DELBA: 2397 /* We are reclaiming the last packet of the */ 2398 /* aggregated HW queue */ 2399 if (txq_id == tid_data->agg.txq_id && 2400 q->read_ptr == q->write_ptr) { 2401 u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2402 int tx_fifo = il4965_get_fifo_from_tid(tid); 2403 D_HT("HW queue empty: continue DELBA flow\n"); 2404 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo); 2405 tid_data->agg.state = IL_AGG_OFF; 2406 ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid); 2407 } 2408 break; 2409 case IL_EMPTYING_HW_QUEUE_ADDBA: 2410 /* We are reclaiming the last packet of the queue */ 2411 if (tid_data->tfds_in_queue == 0) { 2412 D_HT("HW queue empty: continue ADDBA flow\n"); 2413 tid_data->agg.state = IL_AGG_ON; 2414 ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid); 2415 } 2416 break; 2417 } 2418 2419 return 0; 2420 } 2421 2422 static void 2423 il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1) 2424 { 2425 struct ieee80211_sta *sta; 2426 struct il_station_priv *sta_priv; 2427 2428 rcu_read_lock(); 2429 sta = ieee80211_find_sta(il->vif, addr1); 2430 if (sta) { 2431 sta_priv = (void *)sta->drv_priv; 2432 /* avoid atomic ops if this isn't a client */ 2433 if (sta_priv->client && 2434 atomic_dec_return(&sta_priv->pending_frames) == 0) 2435 ieee80211_sta_block_awake(il->hw, sta, false); 2436 } 2437 rcu_read_unlock(); 2438 } 2439 2440 static void 2441 il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg) 2442 { 2443 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 2444 2445 if (!is_agg) 2446 il4965_non_agg_tx_status(il, hdr->addr1); 2447 2448 ieee80211_tx_status_irqsafe(il->hw, skb); 2449 } 2450 2451 int 2452 il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx) 2453 { 2454 struct il_tx_queue *txq = &il->txq[txq_id]; 2455 struct il_queue *q = &txq->q; 2456 int nfreed = 0; 2457 struct ieee80211_hdr *hdr; 2458 struct sk_buff *skb; 2459 2460 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) { 2461 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, " 2462 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd, 2463 q->write_ptr, q->read_ptr); 2464 return 0; 2465 } 2466 2467 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx; 2468 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) { 2469 2470 skb = txq->skbs[txq->q.read_ptr]; 2471 2472 if (WARN_ON_ONCE(skb == NULL)) 2473 continue; 2474 2475 hdr = (struct ieee80211_hdr *) skb->data; 2476 if (ieee80211_is_data_qos(hdr->frame_control)) 2477 nfreed++; 2478 2479 il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE); 2480 2481 txq->skbs[txq->q.read_ptr] = NULL; 2482 il->ops->txq_free_tfd(il, txq); 2483 } 2484 return nfreed; 2485 } 2486 2487 /* 2488 * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack 2489 * 2490 * Go through block-ack's bitmap of ACK'd frames, update driver's record of 2491 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo. 2492 */ 2493 static int 2494 il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg, 2495 struct il_compressed_ba_resp *ba_resp) 2496 { 2497 int i, sh, ack; 2498 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl); 2499 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 2500 int successes = 0; 2501 struct ieee80211_tx_info *info; 2502 u64 bitmap, sent_bitmap; 2503 2504 if (unlikely(!agg->wait_for_ba)) { 2505 if (unlikely(ba_resp->bitmap)) 2506 IL_ERR("Received BA when not expected\n"); 2507 return -EINVAL; 2508 } 2509 2510 /* Mark that the expected block-ack response arrived */ 2511 agg->wait_for_ba = 0; 2512 D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl); 2513 2514 /* Calculate shift to align block-ack bits with our Tx win bits */ 2515 sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4); 2516 if (sh < 0) /* tbw something is wrong with indices */ 2517 sh += 0x100; 2518 2519 if (agg->frame_count > (64 - sh)) { 2520 D_TX_REPLY("more frames than bitmap size"); 2521 return -1; 2522 } 2523 2524 /* don't use 64-bit values for now */ 2525 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh; 2526 2527 /* check for success or failure according to the 2528 * transmitted bitmap and block-ack bitmap */ 2529 sent_bitmap = bitmap & agg->bitmap; 2530 2531 /* For each frame attempted in aggregation, 2532 * update driver's record of tx frame's status. */ 2533 i = 0; 2534 while (sent_bitmap) { 2535 ack = sent_bitmap & 1ULL; 2536 successes += ack; 2537 D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK", 2538 i, (agg->start_idx + i) & 0xff, agg->start_idx + i); 2539 sent_bitmap >>= 1; 2540 ++i; 2541 } 2542 2543 D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap); 2544 2545 info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]); 2546 memset(&info->status, 0, sizeof(info->status)); 2547 info->flags |= IEEE80211_TX_STAT_ACK; 2548 info->flags |= IEEE80211_TX_STAT_AMPDU; 2549 info->status.ampdu_ack_len = successes; 2550 info->status.ampdu_len = agg->frame_count; 2551 il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info); 2552 2553 return 0; 2554 } 2555 2556 static inline bool 2557 il4965_is_tx_success(u32 status) 2558 { 2559 status &= TX_STATUS_MSK; 2560 return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE); 2561 } 2562 2563 static u8 2564 il4965_find_station(struct il_priv *il, const u8 *addr) 2565 { 2566 int i; 2567 int start = 0; 2568 int ret = IL_INVALID_STATION; 2569 unsigned long flags; 2570 2571 if (il->iw_mode == NL80211_IFTYPE_ADHOC) 2572 start = IL_STA_ID; 2573 2574 if (is_broadcast_ether_addr(addr)) 2575 return il->hw_params.bcast_id; 2576 2577 spin_lock_irqsave(&il->sta_lock, flags); 2578 for (i = start; i < il->hw_params.max_stations; i++) 2579 if (il->stations[i].used && 2580 ether_addr_equal(il->stations[i].sta.sta.addr, addr)) { 2581 ret = i; 2582 goto out; 2583 } 2584 2585 D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations); 2586 2587 out: 2588 /* 2589 * It may be possible that more commands interacting with stations 2590 * arrive before we completed processing the adding of 2591 * station 2592 */ 2593 if (ret != IL_INVALID_STATION && 2594 (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) || 2595 (il->stations[ret].used & IL_STA_UCODE_INPROGRESS))) { 2596 IL_ERR("Requested station info for sta %d before ready.\n", 2597 ret); 2598 ret = IL_INVALID_STATION; 2599 } 2600 spin_unlock_irqrestore(&il->sta_lock, flags); 2601 return ret; 2602 } 2603 2604 static int 2605 il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr) 2606 { 2607 if (il->iw_mode == NL80211_IFTYPE_STATION) 2608 return IL_AP_ID; 2609 else { 2610 u8 *da = ieee80211_get_DA(hdr); 2611 2612 return il4965_find_station(il, da); 2613 } 2614 } 2615 2616 static inline u32 2617 il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp) 2618 { 2619 return le32_to_cpup(&tx_resp->u.status + 2620 tx_resp->frame_count) & IEEE80211_MAX_SN; 2621 } 2622 2623 static inline u32 2624 il4965_tx_status_to_mac80211(u32 status) 2625 { 2626 status &= TX_STATUS_MSK; 2627 2628 switch (status) { 2629 case TX_STATUS_SUCCESS: 2630 case TX_STATUS_DIRECT_DONE: 2631 return IEEE80211_TX_STAT_ACK; 2632 case TX_STATUS_FAIL_DEST_PS: 2633 return IEEE80211_TX_STAT_TX_FILTERED; 2634 default: 2635 return 0; 2636 } 2637 } 2638 2639 /* 2640 * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue 2641 */ 2642 static int 2643 il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg, 2644 struct il4965_tx_resp *tx_resp, int txq_id, 2645 u16 start_idx) 2646 { 2647 u16 status; 2648 struct agg_tx_status *frame_status = tx_resp->u.agg_status; 2649 struct ieee80211_tx_info *info = NULL; 2650 struct ieee80211_hdr *hdr = NULL; 2651 u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); 2652 int i, sh, idx; 2653 u16 seq; 2654 if (agg->wait_for_ba) 2655 D_TX_REPLY("got tx response w/o block-ack\n"); 2656 2657 agg->frame_count = tx_resp->frame_count; 2658 agg->start_idx = start_idx; 2659 agg->rate_n_flags = rate_n_flags; 2660 agg->bitmap = 0; 2661 2662 /* num frames attempted by Tx command */ 2663 if (agg->frame_count == 1) { 2664 /* Only one frame was attempted; no block-ack will arrive */ 2665 status = le16_to_cpu(frame_status[0].status); 2666 idx = start_idx; 2667 2668 D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n", 2669 agg->frame_count, agg->start_idx, idx); 2670 2671 info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]); 2672 info->status.rates[0].count = tx_resp->failure_frame + 1; 2673 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 2674 info->flags |= il4965_tx_status_to_mac80211(status); 2675 il4965_hwrate_to_tx_control(il, rate_n_flags, info); 2676 2677 D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff, 2678 tx_resp->failure_frame); 2679 D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags); 2680 2681 agg->wait_for_ba = 0; 2682 } else { 2683 /* Two or more frames were attempted; expect block-ack */ 2684 u64 bitmap = 0; 2685 int start = agg->start_idx; 2686 struct sk_buff *skb; 2687 2688 /* Construct bit-map of pending frames within Tx win */ 2689 for (i = 0; i < agg->frame_count; i++) { 2690 u16 sc; 2691 status = le16_to_cpu(frame_status[i].status); 2692 seq = le16_to_cpu(frame_status[i].sequence); 2693 idx = SEQ_TO_IDX(seq); 2694 txq_id = SEQ_TO_QUEUE(seq); 2695 2696 if (status & 2697 (AGG_TX_STATE_FEW_BYTES_MSK | 2698 AGG_TX_STATE_ABORT_MSK)) 2699 continue; 2700 2701 D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n", 2702 agg->frame_count, txq_id, idx); 2703 2704 skb = il->txq[txq_id].skbs[idx]; 2705 if (WARN_ON_ONCE(skb == NULL)) 2706 return -1; 2707 hdr = (struct ieee80211_hdr *) skb->data; 2708 2709 sc = le16_to_cpu(hdr->seq_ctrl); 2710 if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) { 2711 IL_ERR("BUG_ON idx doesn't match seq control" 2712 " idx=%d, seq_idx=%d, seq=%d\n", idx, 2713 IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl); 2714 return -1; 2715 } 2716 2717 D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx, 2718 IEEE80211_SEQ_TO_SN(sc)); 2719 2720 sh = idx - start; 2721 if (sh > 64) { 2722 sh = (start - idx) + 0xff; 2723 bitmap = bitmap << sh; 2724 sh = 0; 2725 start = idx; 2726 } else if (sh < -64) 2727 sh = 0xff - (start - idx); 2728 else if (sh < 0) { 2729 sh = start - idx; 2730 start = idx; 2731 bitmap = bitmap << sh; 2732 sh = 0; 2733 } 2734 bitmap |= 1ULL << sh; 2735 D_TX_REPLY("start=%d bitmap=0x%llx\n", start, 2736 (unsigned long long)bitmap); 2737 } 2738 2739 agg->bitmap = bitmap; 2740 agg->start_idx = start; 2741 D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n", 2742 agg->frame_count, agg->start_idx, 2743 (unsigned long long)agg->bitmap); 2744 2745 if (bitmap) 2746 agg->wait_for_ba = 1; 2747 } 2748 return 0; 2749 } 2750 2751 /* 2752 * il4965_hdl_tx - Handle standard (non-aggregation) Tx response 2753 */ 2754 static void 2755 il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb) 2756 { 2757 struct il_rx_pkt *pkt = rxb_addr(rxb); 2758 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 2759 int txq_id = SEQ_TO_QUEUE(sequence); 2760 int idx = SEQ_TO_IDX(sequence); 2761 struct il_tx_queue *txq = &il->txq[txq_id]; 2762 struct sk_buff *skb; 2763 struct ieee80211_hdr *hdr; 2764 struct ieee80211_tx_info *info; 2765 struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; 2766 u32 status = le32_to_cpu(tx_resp->u.status); 2767 int tid; 2768 int sta_id; 2769 int freed; 2770 u8 *qc = NULL; 2771 unsigned long flags; 2772 2773 if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) { 2774 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d " 2775 "is out of range [0-%d] %d %d\n", txq_id, idx, 2776 txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr); 2777 return; 2778 } 2779 2780 txq->time_stamp = jiffies; 2781 2782 skb = txq->skbs[txq->q.read_ptr]; 2783 info = IEEE80211_SKB_CB(skb); 2784 memset(&info->status, 0, sizeof(info->status)); 2785 2786 hdr = (struct ieee80211_hdr *) skb->data; 2787 if (ieee80211_is_data_qos(hdr->frame_control)) { 2788 qc = ieee80211_get_qos_ctl(hdr); 2789 tid = qc[0] & 0xf; 2790 } 2791 2792 sta_id = il4965_get_ra_sta_id(il, hdr); 2793 if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) { 2794 IL_ERR("Station not known\n"); 2795 return; 2796 } 2797 2798 /* 2799 * Firmware will not transmit frame on passive channel, if it not yet 2800 * received some valid frame on that channel. When this error happen 2801 * we have to wait until firmware will unblock itself i.e. when we 2802 * note received beacon or other frame. We unblock queues in 2803 * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed. 2804 */ 2805 if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) && 2806 il->iw_mode == NL80211_IFTYPE_STATION) { 2807 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE); 2808 D_INFO("Stopped queues - RX waiting on passive channel\n"); 2809 } 2810 2811 spin_lock_irqsave(&il->sta_lock, flags); 2812 if (txq->sched_retry) { 2813 const u32 scd_ssn = il4965_get_scd_ssn(tx_resp); 2814 struct il_ht_agg *agg; 2815 2816 if (WARN_ON(!qc)) 2817 goto out; 2818 2819 agg = &il->stations[sta_id].tid[tid].agg; 2820 2821 il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx); 2822 2823 /* check if BAR is needed */ 2824 if (tx_resp->frame_count == 1 && 2825 !il4965_is_tx_success(status)) 2826 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 2827 2828 if (txq->q.read_ptr != (scd_ssn & 0xff)) { 2829 idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd); 2830 D_TX_REPLY("Retry scheduler reclaim scd_ssn " 2831 "%d idx %d\n", scd_ssn, idx); 2832 freed = il4965_tx_queue_reclaim(il, txq_id, idx); 2833 il4965_free_tfds_in_queue(il, sta_id, tid, freed); 2834 2835 if (il->mac80211_registered && 2836 il_queue_space(&txq->q) > txq->q.low_mark && 2837 agg->state != IL_EMPTYING_HW_QUEUE_DELBA) 2838 il_wake_queue(il, txq); 2839 } 2840 } else { 2841 info->status.rates[0].count = tx_resp->failure_frame + 1; 2842 info->flags |= il4965_tx_status_to_mac80211(status); 2843 il4965_hwrate_to_tx_control(il, 2844 le32_to_cpu(tx_resp->rate_n_flags), 2845 info); 2846 2847 D_TX_REPLY("TXQ %d status %s (0x%08x) " 2848 "rate_n_flags 0x%x retries %d\n", txq_id, 2849 il4965_get_tx_fail_reason(status), status, 2850 le32_to_cpu(tx_resp->rate_n_flags), 2851 tx_resp->failure_frame); 2852 2853 freed = il4965_tx_queue_reclaim(il, txq_id, idx); 2854 if (qc && likely(sta_id != IL_INVALID_STATION)) 2855 il4965_free_tfds_in_queue(il, sta_id, tid, freed); 2856 else if (sta_id == IL_INVALID_STATION) 2857 D_TX_REPLY("Station not known\n"); 2858 2859 if (il->mac80211_registered && 2860 il_queue_space(&txq->q) > txq->q.low_mark) 2861 il_wake_queue(il, txq); 2862 } 2863 out: 2864 if (qc && likely(sta_id != IL_INVALID_STATION)) 2865 il4965_txq_check_empty(il, sta_id, tid, txq_id); 2866 2867 il4965_check_abort_status(il, tx_resp->frame_count, status); 2868 2869 spin_unlock_irqrestore(&il->sta_lock, flags); 2870 } 2871 2872 /* 2873 * translate ucode response to mac80211 tx status control values 2874 */ 2875 void 2876 il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags, 2877 struct ieee80211_tx_info *info) 2878 { 2879 struct ieee80211_tx_rate *r = &info->status.rates[0]; 2880 2881 info->status.antenna = 2882 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 2883 if (rate_n_flags & RATE_MCS_HT_MSK) 2884 r->flags |= IEEE80211_TX_RC_MCS; 2885 if (rate_n_flags & RATE_MCS_GF_MSK) 2886 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 2887 if (rate_n_flags & RATE_MCS_HT40_MSK) 2888 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 2889 if (rate_n_flags & RATE_MCS_DUP_MSK) 2890 r->flags |= IEEE80211_TX_RC_DUP_DATA; 2891 if (rate_n_flags & RATE_MCS_SGI_MSK) 2892 r->flags |= IEEE80211_TX_RC_SHORT_GI; 2893 r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band); 2894 } 2895 2896 /* 2897 * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA 2898 * 2899 * Handles block-acknowledge notification from device, which reports success 2900 * of frames sent via aggregation. 2901 */ 2902 static void 2903 il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb) 2904 { 2905 struct il_rx_pkt *pkt = rxb_addr(rxb); 2906 struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; 2907 struct il_tx_queue *txq = NULL; 2908 struct il_ht_agg *agg; 2909 int idx; 2910 int sta_id; 2911 int tid; 2912 unsigned long flags; 2913 2914 /* "flow" corresponds to Tx queue */ 2915 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 2916 2917 /* "ssn" is start of block-ack Tx win, corresponds to idx 2918 * (in Tx queue's circular buffer) of first TFD/frame in win */ 2919 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); 2920 2921 if (scd_flow >= il->hw_params.max_txq_num) { 2922 IL_ERR("BUG_ON scd_flow is bigger than number of queues\n"); 2923 return; 2924 } 2925 2926 txq = &il->txq[scd_flow]; 2927 sta_id = ba_resp->sta_id; 2928 tid = ba_resp->tid; 2929 agg = &il->stations[sta_id].tid[tid].agg; 2930 if (unlikely(agg->txq_id != scd_flow)) { 2931 /* 2932 * FIXME: this is a uCode bug which need to be addressed, 2933 * log the information and return for now! 2934 * since it is possible happen very often and in order 2935 * not to fill the syslog, don't enable the logging by default 2936 */ 2937 D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n", 2938 scd_flow, agg->txq_id); 2939 return; 2940 } 2941 2942 /* Find idx just before block-ack win */ 2943 idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); 2944 2945 spin_lock_irqsave(&il->sta_lock, flags); 2946 2947 D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n", 2948 agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32, 2949 ba_resp->sta_id); 2950 D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = " 2951 "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl, 2952 (unsigned long long)le64_to_cpu(ba_resp->bitmap), 2953 ba_resp->scd_flow, ba_resp->scd_ssn); 2954 D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx, 2955 (unsigned long long)agg->bitmap); 2956 2957 /* Update driver's record of ACK vs. not for each frame in win */ 2958 il4965_tx_status_reply_compressed_ba(il, agg, ba_resp); 2959 2960 /* Release all TFDs before the SSN, i.e. all TFDs in front of 2961 * block-ack win (we assume that they've been successfully 2962 * transmitted ... if not, it's too late anyway). */ 2963 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) { 2964 /* calculate mac80211 ampdu sw queue to wake */ 2965 int freed = il4965_tx_queue_reclaim(il, scd_flow, idx); 2966 il4965_free_tfds_in_queue(il, sta_id, tid, freed); 2967 2968 if (il_queue_space(&txq->q) > txq->q.low_mark && 2969 il->mac80211_registered && 2970 agg->state != IL_EMPTYING_HW_QUEUE_DELBA) 2971 il_wake_queue(il, txq); 2972 2973 il4965_txq_check_empty(il, sta_id, tid, scd_flow); 2974 } 2975 2976 spin_unlock_irqrestore(&il->sta_lock, flags); 2977 } 2978 2979 #ifdef CONFIG_IWLEGACY_DEBUG 2980 const char * 2981 il4965_get_tx_fail_reason(u32 status) 2982 { 2983 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 2984 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 2985 2986 switch (status & TX_STATUS_MSK) { 2987 case TX_STATUS_SUCCESS: 2988 return "SUCCESS"; 2989 TX_STATUS_POSTPONE(DELAY); 2990 TX_STATUS_POSTPONE(FEW_BYTES); 2991 TX_STATUS_POSTPONE(QUIET_PERIOD); 2992 TX_STATUS_POSTPONE(CALC_TTAK); 2993 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 2994 TX_STATUS_FAIL(SHORT_LIMIT); 2995 TX_STATUS_FAIL(LONG_LIMIT); 2996 TX_STATUS_FAIL(FIFO_UNDERRUN); 2997 TX_STATUS_FAIL(DRAIN_FLOW); 2998 TX_STATUS_FAIL(RFKILL_FLUSH); 2999 TX_STATUS_FAIL(LIFE_EXPIRE); 3000 TX_STATUS_FAIL(DEST_PS); 3001 TX_STATUS_FAIL(HOST_ABORTED); 3002 TX_STATUS_FAIL(BT_RETRY); 3003 TX_STATUS_FAIL(STA_INVALID); 3004 TX_STATUS_FAIL(FRAG_DROPPED); 3005 TX_STATUS_FAIL(TID_DISABLE); 3006 TX_STATUS_FAIL(FIFO_FLUSHED); 3007 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); 3008 TX_STATUS_FAIL(PASSIVE_NO_RX); 3009 TX_STATUS_FAIL(NO_BEACON_ON_RADAR); 3010 } 3011 3012 return "UNKNOWN"; 3013 3014 #undef TX_STATUS_FAIL 3015 #undef TX_STATUS_POSTPONE 3016 } 3017 #endif /* CONFIG_IWLEGACY_DEBUG */ 3018 3019 static struct il_link_quality_cmd * 3020 il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id) 3021 { 3022 int i, r; 3023 struct il_link_quality_cmd *link_cmd; 3024 u32 rate_flags = 0; 3025 __le32 rate_n_flags; 3026 3027 link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL); 3028 if (!link_cmd) { 3029 IL_ERR("Unable to allocate memory for LQ cmd.\n"); 3030 return NULL; 3031 } 3032 /* Set up the rate scaling to start at selected rate, fall back 3033 * all the way down to 1M in IEEE order, and then spin on 1M */ 3034 if (il->band == NL80211_BAND_5GHZ) 3035 r = RATE_6M_IDX; 3036 else 3037 r = RATE_1M_IDX; 3038 3039 if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE) 3040 rate_flags |= RATE_MCS_CCK_MSK; 3041 3042 rate_flags |= 3043 il4965_first_antenna(il->hw_params. 3044 valid_tx_ant) << RATE_MCS_ANT_POS; 3045 rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags); 3046 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) 3047 link_cmd->rs_table[i].rate_n_flags = rate_n_flags; 3048 3049 link_cmd->general_params.single_stream_ant_msk = 3050 il4965_first_antenna(il->hw_params.valid_tx_ant); 3051 3052 link_cmd->general_params.dual_stream_ant_msk = 3053 il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params. 3054 valid_tx_ant); 3055 if (!link_cmd->general_params.dual_stream_ant_msk) { 3056 link_cmd->general_params.dual_stream_ant_msk = ANT_AB; 3057 } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) { 3058 link_cmd->general_params.dual_stream_ant_msk = 3059 il->hw_params.valid_tx_ant; 3060 } 3061 3062 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; 3063 link_cmd->agg_params.agg_time_limit = 3064 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); 3065 3066 link_cmd->sta_id = sta_id; 3067 3068 return link_cmd; 3069 } 3070 3071 /* 3072 * il4965_add_bssid_station - Add the special IBSS BSSID station 3073 * 3074 * Function sleeps. 3075 */ 3076 int 3077 il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r) 3078 { 3079 int ret; 3080 u8 sta_id; 3081 struct il_link_quality_cmd *link_cmd; 3082 unsigned long flags; 3083 3084 if (sta_id_r) 3085 *sta_id_r = IL_INVALID_STATION; 3086 3087 ret = il_add_station_common(il, addr, 0, NULL, &sta_id); 3088 if (ret) { 3089 IL_ERR("Unable to add station %pM\n", addr); 3090 return ret; 3091 } 3092 3093 if (sta_id_r) 3094 *sta_id_r = sta_id; 3095 3096 spin_lock_irqsave(&il->sta_lock, flags); 3097 il->stations[sta_id].used |= IL_STA_LOCAL; 3098 spin_unlock_irqrestore(&il->sta_lock, flags); 3099 3100 /* Set up default rate scaling table in device's station table */ 3101 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3102 if (!link_cmd) { 3103 IL_ERR("Unable to initialize rate scaling for station %pM.\n", 3104 addr); 3105 return -ENOMEM; 3106 } 3107 3108 ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true); 3109 if (ret) 3110 IL_ERR("Link quality command failed (%d)\n", ret); 3111 3112 spin_lock_irqsave(&il->sta_lock, flags); 3113 il->stations[sta_id].lq = link_cmd; 3114 spin_unlock_irqrestore(&il->sta_lock, flags); 3115 3116 return 0; 3117 } 3118 3119 static int 3120 il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty) 3121 { 3122 int i; 3123 u8 buff[sizeof(struct il_wep_cmd) + 3124 sizeof(struct il_wep_key) * WEP_KEYS_MAX]; 3125 struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff; 3126 size_t cmd_size = sizeof(struct il_wep_cmd); 3127 struct il_host_cmd cmd = { 3128 .id = C_WEPKEY, 3129 .data = wep_cmd, 3130 .flags = CMD_SYNC, 3131 }; 3132 bool not_empty = false; 3133 3134 might_sleep(); 3135 3136 memset(wep_cmd, 0, 3137 cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX)); 3138 3139 for (i = 0; i < WEP_KEYS_MAX; i++) { 3140 u8 key_size = il->_4965.wep_keys[i].key_size; 3141 3142 wep_cmd->key[i].key_idx = i; 3143 if (key_size) { 3144 wep_cmd->key[i].key_offset = i; 3145 not_empty = true; 3146 } else 3147 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET; 3148 3149 wep_cmd->key[i].key_size = key_size; 3150 memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size); 3151 } 3152 3153 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE; 3154 wep_cmd->num_keys = WEP_KEYS_MAX; 3155 3156 cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX; 3157 cmd.len = cmd_size; 3158 3159 if (not_empty || send_if_empty) 3160 return il_send_cmd(il, &cmd); 3161 else 3162 return 0; 3163 } 3164 3165 int 3166 il4965_restore_default_wep_keys(struct il_priv *il) 3167 { 3168 lockdep_assert_held(&il->mutex); 3169 3170 return il4965_static_wepkey_cmd(il, false); 3171 } 3172 3173 int 3174 il4965_remove_default_wep_key(struct il_priv *il, 3175 struct ieee80211_key_conf *keyconf) 3176 { 3177 int ret; 3178 int idx = keyconf->keyidx; 3179 3180 lockdep_assert_held(&il->mutex); 3181 3182 D_WEP("Removing default WEP key: idx=%d\n", idx); 3183 3184 memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key)); 3185 if (il_is_rfkill(il)) { 3186 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n"); 3187 /* but keys in device are clear anyway so return success */ 3188 return 0; 3189 } 3190 ret = il4965_static_wepkey_cmd(il, 1); 3191 D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret); 3192 3193 return ret; 3194 } 3195 3196 int 3197 il4965_set_default_wep_key(struct il_priv *il, 3198 struct ieee80211_key_conf *keyconf) 3199 { 3200 int ret; 3201 int len = keyconf->keylen; 3202 int idx = keyconf->keyidx; 3203 3204 lockdep_assert_held(&il->mutex); 3205 3206 if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) { 3207 D_WEP("Bad WEP key length %d\n", keyconf->keylen); 3208 return -EINVAL; 3209 } 3210 3211 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; 3212 keyconf->hw_key_idx = HW_KEY_DEFAULT; 3213 il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher; 3214 3215 il->_4965.wep_keys[idx].key_size = len; 3216 memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len); 3217 3218 ret = il4965_static_wepkey_cmd(il, false); 3219 3220 D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret); 3221 return ret; 3222 } 3223 3224 static int 3225 il4965_set_wep_dynamic_key_info(struct il_priv *il, 3226 struct ieee80211_key_conf *keyconf, u8 sta_id) 3227 { 3228 unsigned long flags; 3229 __le16 key_flags = 0; 3230 struct il_addsta_cmd sta_cmd; 3231 3232 lockdep_assert_held(&il->mutex); 3233 3234 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; 3235 3236 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK); 3237 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3238 key_flags &= ~STA_KEY_FLG_INVALID; 3239 3240 if (keyconf->keylen == WEP_KEY_LEN_128) 3241 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK; 3242 3243 if (sta_id == il->hw_params.bcast_id) 3244 key_flags |= STA_KEY_MULTICAST_MSK; 3245 3246 spin_lock_irqsave(&il->sta_lock, flags); 3247 3248 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3249 il->stations[sta_id].keyinfo.keylen = keyconf->keylen; 3250 il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx; 3251 3252 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); 3253 3254 memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key, 3255 keyconf->keylen); 3256 3257 if ((il->stations[sta_id].sta.key. 3258 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3259 il->stations[sta_id].sta.key.key_offset = 3260 il_get_free_ucode_key_idx(il); 3261 /* else, we are overriding an existing key => no need to allocated room 3262 * in uCode. */ 3263 3264 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3265 "no space for a new key"); 3266 3267 il->stations[sta_id].sta.key.key_flags = key_flags; 3268 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3269 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3270 3271 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3272 sizeof(struct il_addsta_cmd)); 3273 spin_unlock_irqrestore(&il->sta_lock, flags); 3274 3275 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3276 } 3277 3278 static int 3279 il4965_set_ccmp_dynamic_key_info(struct il_priv *il, 3280 struct ieee80211_key_conf *keyconf, u8 sta_id) 3281 { 3282 unsigned long flags; 3283 __le16 key_flags = 0; 3284 struct il_addsta_cmd sta_cmd; 3285 3286 lockdep_assert_held(&il->mutex); 3287 3288 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK); 3289 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3290 key_flags &= ~STA_KEY_FLG_INVALID; 3291 3292 if (sta_id == il->hw_params.bcast_id) 3293 key_flags |= STA_KEY_MULTICAST_MSK; 3294 3295 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 3296 3297 spin_lock_irqsave(&il->sta_lock, flags); 3298 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3299 il->stations[sta_id].keyinfo.keylen = keyconf->keylen; 3300 3301 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); 3302 3303 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen); 3304 3305 if ((il->stations[sta_id].sta.key. 3306 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3307 il->stations[sta_id].sta.key.key_offset = 3308 il_get_free_ucode_key_idx(il); 3309 /* else, we are overriding an existing key => no need to allocated room 3310 * in uCode. */ 3311 3312 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3313 "no space for a new key"); 3314 3315 il->stations[sta_id].sta.key.key_flags = key_flags; 3316 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3317 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3318 3319 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3320 sizeof(struct il_addsta_cmd)); 3321 spin_unlock_irqrestore(&il->sta_lock, flags); 3322 3323 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3324 } 3325 3326 static int 3327 il4965_set_tkip_dynamic_key_info(struct il_priv *il, 3328 struct ieee80211_key_conf *keyconf, u8 sta_id) 3329 { 3330 unsigned long flags; 3331 __le16 key_flags = 0; 3332 3333 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK); 3334 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3335 key_flags &= ~STA_KEY_FLG_INVALID; 3336 3337 if (sta_id == il->hw_params.bcast_id) 3338 key_flags |= STA_KEY_MULTICAST_MSK; 3339 3340 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 3341 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 3342 3343 spin_lock_irqsave(&il->sta_lock, flags); 3344 3345 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3346 il->stations[sta_id].keyinfo.keylen = 16; 3347 3348 if ((il->stations[sta_id].sta.key. 3349 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3350 il->stations[sta_id].sta.key.key_offset = 3351 il_get_free_ucode_key_idx(il); 3352 /* else, we are overriding an existing key => no need to allocated room 3353 * in uCode. */ 3354 3355 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3356 "no space for a new key"); 3357 3358 il->stations[sta_id].sta.key.key_flags = key_flags; 3359 3360 /* This copy is acutally not needed: we get the key with each TX */ 3361 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16); 3362 3363 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16); 3364 3365 spin_unlock_irqrestore(&il->sta_lock, flags); 3366 3367 return 0; 3368 } 3369 3370 void 3371 il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, 3372 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) 3373 { 3374 u8 sta_id; 3375 unsigned long flags; 3376 int i; 3377 3378 if (il_scan_cancel(il)) { 3379 /* cancel scan failed, just live w/ bad key and rely 3380 briefly on SW decryption */ 3381 return; 3382 } 3383 3384 sta_id = il_sta_id_or_broadcast(il, sta); 3385 if (sta_id == IL_INVALID_STATION) 3386 return; 3387 3388 spin_lock_irqsave(&il->sta_lock, flags); 3389 3390 il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32; 3391 3392 for (i = 0; i < 5; i++) 3393 il->stations[sta_id].sta.key.tkip_rx_ttak[i] = 3394 cpu_to_le16(phase1key[i]); 3395 3396 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3397 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3398 3399 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); 3400 3401 spin_unlock_irqrestore(&il->sta_lock, flags); 3402 } 3403 3404 int 3405 il4965_remove_dynamic_key(struct il_priv *il, 3406 struct ieee80211_key_conf *keyconf, u8 sta_id) 3407 { 3408 unsigned long flags; 3409 u16 key_flags; 3410 u8 keyidx; 3411 struct il_addsta_cmd sta_cmd; 3412 3413 lockdep_assert_held(&il->mutex); 3414 3415 il->_4965.key_mapping_keys--; 3416 3417 spin_lock_irqsave(&il->sta_lock, flags); 3418 key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags); 3419 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3; 3420 3421 D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id); 3422 3423 if (keyconf->keyidx != keyidx) { 3424 /* We need to remove a key with idx different that the one 3425 * in the uCode. This means that the key we need to remove has 3426 * been replaced by another one with different idx. 3427 * Don't do anything and return ok 3428 */ 3429 spin_unlock_irqrestore(&il->sta_lock, flags); 3430 return 0; 3431 } 3432 3433 if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) { 3434 IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx, 3435 key_flags); 3436 spin_unlock_irqrestore(&il->sta_lock, flags); 3437 return 0; 3438 } 3439 3440 if (!test_and_clear_bit 3441 (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table)) 3442 IL_ERR("idx %d not used in uCode key table.\n", 3443 il->stations[sta_id].sta.key.key_offset); 3444 memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key)); 3445 memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo)); 3446 il->stations[sta_id].sta.key.key_flags = 3447 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID; 3448 il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx; 3449 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3450 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3451 3452 if (il_is_rfkill(il)) { 3453 D_WEP 3454 ("Not sending C_ADD_STA command because RFKILL enabled.\n"); 3455 spin_unlock_irqrestore(&il->sta_lock, flags); 3456 return 0; 3457 } 3458 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3459 sizeof(struct il_addsta_cmd)); 3460 spin_unlock_irqrestore(&il->sta_lock, flags); 3461 3462 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3463 } 3464 3465 int 3466 il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, 3467 u8 sta_id) 3468 { 3469 int ret; 3470 3471 lockdep_assert_held(&il->mutex); 3472 3473 il->_4965.key_mapping_keys++; 3474 keyconf->hw_key_idx = HW_KEY_DYNAMIC; 3475 3476 switch (keyconf->cipher) { 3477 case WLAN_CIPHER_SUITE_CCMP: 3478 ret = 3479 il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id); 3480 break; 3481 case WLAN_CIPHER_SUITE_TKIP: 3482 ret = 3483 il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id); 3484 break; 3485 case WLAN_CIPHER_SUITE_WEP40: 3486 case WLAN_CIPHER_SUITE_WEP104: 3487 ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id); 3488 break; 3489 default: 3490 IL_ERR("Unknown alg: %s cipher = %x\n", __func__, 3491 keyconf->cipher); 3492 ret = -EINVAL; 3493 } 3494 3495 D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n", 3496 keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret); 3497 3498 return ret; 3499 } 3500 3501 /* 3502 * il4965_alloc_bcast_station - add broadcast station into driver's station table. 3503 * 3504 * This adds the broadcast station into the driver's station table 3505 * and marks it driver active, so that it will be restored to the 3506 * device at the next best time. 3507 */ 3508 int 3509 il4965_alloc_bcast_station(struct il_priv *il) 3510 { 3511 struct il_link_quality_cmd *link_cmd; 3512 unsigned long flags; 3513 u8 sta_id; 3514 3515 spin_lock_irqsave(&il->sta_lock, flags); 3516 sta_id = il_prep_station(il, il_bcast_addr, false, NULL); 3517 if (sta_id == IL_INVALID_STATION) { 3518 IL_ERR("Unable to prepare broadcast station\n"); 3519 spin_unlock_irqrestore(&il->sta_lock, flags); 3520 3521 return -EINVAL; 3522 } 3523 3524 il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE; 3525 il->stations[sta_id].used |= IL_STA_BCAST; 3526 spin_unlock_irqrestore(&il->sta_lock, flags); 3527 3528 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3529 if (!link_cmd) { 3530 IL_ERR 3531 ("Unable to initialize rate scaling for bcast station.\n"); 3532 return -ENOMEM; 3533 } 3534 3535 spin_lock_irqsave(&il->sta_lock, flags); 3536 il->stations[sta_id].lq = link_cmd; 3537 spin_unlock_irqrestore(&il->sta_lock, flags); 3538 3539 return 0; 3540 } 3541 3542 /* 3543 * il4965_update_bcast_station - update broadcast station's LQ command 3544 * 3545 * Only used by iwl4965. Placed here to have all bcast station management 3546 * code together. 3547 */ 3548 static int 3549 il4965_update_bcast_station(struct il_priv *il) 3550 { 3551 unsigned long flags; 3552 struct il_link_quality_cmd *link_cmd; 3553 u8 sta_id = il->hw_params.bcast_id; 3554 3555 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3556 if (!link_cmd) { 3557 IL_ERR("Unable to initialize rate scaling for bcast sta.\n"); 3558 return -ENOMEM; 3559 } 3560 3561 spin_lock_irqsave(&il->sta_lock, flags); 3562 if (il->stations[sta_id].lq) 3563 kfree(il->stations[sta_id].lq); 3564 else 3565 D_INFO("Bcast sta rate scaling has not been initialized.\n"); 3566 il->stations[sta_id].lq = link_cmd; 3567 spin_unlock_irqrestore(&il->sta_lock, flags); 3568 3569 return 0; 3570 } 3571 3572 int 3573 il4965_update_bcast_stations(struct il_priv *il) 3574 { 3575 return il4965_update_bcast_station(il); 3576 } 3577 3578 /* 3579 * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table 3580 */ 3581 int 3582 il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid) 3583 { 3584 unsigned long flags; 3585 struct il_addsta_cmd sta_cmd; 3586 3587 lockdep_assert_held(&il->mutex); 3588 3589 /* Remove "disable" flag, to enable Tx for this TID */ 3590 spin_lock_irqsave(&il->sta_lock, flags); 3591 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; 3592 il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); 3593 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3594 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3595 sizeof(struct il_addsta_cmd)); 3596 spin_unlock_irqrestore(&il->sta_lock, flags); 3597 3598 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3599 } 3600 3601 int 3602 il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid, 3603 u16 ssn) 3604 { 3605 unsigned long flags; 3606 int sta_id; 3607 struct il_addsta_cmd sta_cmd; 3608 3609 lockdep_assert_held(&il->mutex); 3610 3611 sta_id = il_sta_id(sta); 3612 if (sta_id == IL_INVALID_STATION) 3613 return -ENXIO; 3614 3615 spin_lock_irqsave(&il->sta_lock, flags); 3616 il->stations[sta_id].sta.station_flags_msk = 0; 3617 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; 3618 il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid; 3619 il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); 3620 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3621 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3622 sizeof(struct il_addsta_cmd)); 3623 spin_unlock_irqrestore(&il->sta_lock, flags); 3624 3625 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3626 } 3627 3628 int 3629 il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid) 3630 { 3631 unsigned long flags; 3632 int sta_id; 3633 struct il_addsta_cmd sta_cmd; 3634 3635 lockdep_assert_held(&il->mutex); 3636 3637 sta_id = il_sta_id(sta); 3638 if (sta_id == IL_INVALID_STATION) { 3639 IL_ERR("Invalid station for AGG tid %d\n", tid); 3640 return -ENXIO; 3641 } 3642 3643 spin_lock_irqsave(&il->sta_lock, flags); 3644 il->stations[sta_id].sta.station_flags_msk = 0; 3645 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; 3646 il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid; 3647 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3648 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3649 sizeof(struct il_addsta_cmd)); 3650 spin_unlock_irqrestore(&il->sta_lock, flags); 3651 3652 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3653 } 3654 3655 void 3656 il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt) 3657 { 3658 unsigned long flags; 3659 3660 spin_lock_irqsave(&il->sta_lock, flags); 3661 il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK; 3662 il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK; 3663 il->stations[sta_id].sta.sta.modify_mask = 3664 STA_MODIFY_SLEEP_TX_COUNT_MSK; 3665 il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt); 3666 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3667 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); 3668 spin_unlock_irqrestore(&il->sta_lock, flags); 3669 3670 } 3671 3672 void 3673 il4965_update_chain_flags(struct il_priv *il) 3674 { 3675 if (il->ops->set_rxon_chain) { 3676 il->ops->set_rxon_chain(il); 3677 if (il->active.rx_chain != il->staging.rx_chain) 3678 il_commit_rxon(il); 3679 } 3680 } 3681 3682 static void 3683 il4965_clear_free_frames(struct il_priv *il) 3684 { 3685 struct list_head *element; 3686 3687 D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count); 3688 3689 while (!list_empty(&il->free_frames)) { 3690 element = il->free_frames.next; 3691 list_del(element); 3692 kfree(list_entry(element, struct il_frame, list)); 3693 il->frames_count--; 3694 } 3695 3696 if (il->frames_count) { 3697 IL_WARN("%d frames still in use. Did we lose one?\n", 3698 il->frames_count); 3699 il->frames_count = 0; 3700 } 3701 } 3702 3703 static struct il_frame * 3704 il4965_get_free_frame(struct il_priv *il) 3705 { 3706 struct il_frame *frame; 3707 struct list_head *element; 3708 if (list_empty(&il->free_frames)) { 3709 frame = kzalloc(sizeof(*frame), GFP_KERNEL); 3710 if (!frame) { 3711 IL_ERR("Could not allocate frame!\n"); 3712 return NULL; 3713 } 3714 3715 il->frames_count++; 3716 return frame; 3717 } 3718 3719 element = il->free_frames.next; 3720 list_del(element); 3721 return list_entry(element, struct il_frame, list); 3722 } 3723 3724 static void 3725 il4965_free_frame(struct il_priv *il, struct il_frame *frame) 3726 { 3727 memset(frame, 0, sizeof(*frame)); 3728 list_add(&frame->list, &il->free_frames); 3729 } 3730 3731 static u32 3732 il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr, 3733 int left) 3734 { 3735 lockdep_assert_held(&il->mutex); 3736 3737 if (!il->beacon_skb) 3738 return 0; 3739 3740 if (il->beacon_skb->len > left) 3741 return 0; 3742 3743 memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len); 3744 3745 return il->beacon_skb->len; 3746 } 3747 3748 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */ 3749 static void 3750 il4965_set_beacon_tim(struct il_priv *il, 3751 struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon, 3752 u32 frame_size) 3753 { 3754 u16 tim_idx; 3755 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 3756 3757 /* 3758 * The idx is relative to frame start but we start looking at the 3759 * variable-length part of the beacon. 3760 */ 3761 tim_idx = mgmt->u.beacon.variable - beacon; 3762 3763 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 3764 while ((tim_idx < (frame_size - 2)) && 3765 (beacon[tim_idx] != WLAN_EID_TIM)) 3766 tim_idx += beacon[tim_idx + 1] + 2; 3767 3768 /* If TIM field was found, set variables */ 3769 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 3770 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx); 3771 tx_beacon_cmd->tim_size = beacon[tim_idx + 1]; 3772 } else 3773 IL_WARN("Unable to find TIM Element in beacon\n"); 3774 } 3775 3776 static unsigned int 3777 il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame) 3778 { 3779 struct il_tx_beacon_cmd *tx_beacon_cmd; 3780 u32 frame_size; 3781 u32 rate_flags; 3782 u32 rate; 3783 /* 3784 * We have to set up the TX command, the TX Beacon command, and the 3785 * beacon contents. 3786 */ 3787 3788 lockdep_assert_held(&il->mutex); 3789 3790 if (!il->beacon_enabled) { 3791 IL_ERR("Trying to build beacon without beaconing enabled\n"); 3792 return 0; 3793 } 3794 3795 /* Initialize memory */ 3796 tx_beacon_cmd = &frame->u.beacon; 3797 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); 3798 3799 /* Set up TX beacon contents */ 3800 frame_size = 3801 il4965_fill_beacon_frame(il, tx_beacon_cmd->frame, 3802 sizeof(frame->u) - sizeof(*tx_beacon_cmd)); 3803 if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE)) 3804 return 0; 3805 if (!frame_size) 3806 return 0; 3807 3808 /* Set up TX command fields */ 3809 tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size); 3810 tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id; 3811 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 3812 tx_beacon_cmd->tx.tx_flags = 3813 TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK | 3814 TX_CMD_FLG_STA_RATE_MSK; 3815 3816 /* Set up TX beacon command fields */ 3817 il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame, 3818 frame_size); 3819 3820 /* Set up packet rate and flags */ 3821 rate = il_get_lowest_plcp(il); 3822 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); 3823 rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; 3824 if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE)) 3825 rate_flags |= RATE_MCS_CCK_MSK; 3826 tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags); 3827 3828 return sizeof(*tx_beacon_cmd) + frame_size; 3829 } 3830 3831 int 3832 il4965_send_beacon_cmd(struct il_priv *il) 3833 { 3834 struct il_frame *frame; 3835 unsigned int frame_size; 3836 int rc; 3837 3838 frame = il4965_get_free_frame(il); 3839 if (!frame) { 3840 IL_ERR("Could not obtain free frame buffer for beacon " 3841 "command.\n"); 3842 return -ENOMEM; 3843 } 3844 3845 frame_size = il4965_hw_get_beacon_cmd(il, frame); 3846 if (!frame_size) { 3847 IL_ERR("Error configuring the beacon command\n"); 3848 il4965_free_frame(il, frame); 3849 return -EINVAL; 3850 } 3851 3852 rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]); 3853 3854 il4965_free_frame(il, frame); 3855 3856 return rc; 3857 } 3858 3859 static inline dma_addr_t 3860 il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx) 3861 { 3862 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3863 3864 dma_addr_t addr = get_unaligned_le32(&tb->lo); 3865 if (sizeof(dma_addr_t) > sizeof(u32)) 3866 addr |= 3867 ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 3868 16; 3869 3870 return addr; 3871 } 3872 3873 static inline u16 3874 il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx) 3875 { 3876 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3877 3878 return le16_to_cpu(tb->hi_n_len) >> 4; 3879 } 3880 3881 static inline void 3882 il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len) 3883 { 3884 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3885 u16 hi_n_len = len << 4; 3886 3887 put_unaligned_le32(addr, &tb->lo); 3888 if (sizeof(dma_addr_t) > sizeof(u32)) 3889 hi_n_len |= ((addr >> 16) >> 16) & 0xF; 3890 3891 tb->hi_n_len = cpu_to_le16(hi_n_len); 3892 3893 tfd->num_tbs = idx + 1; 3894 } 3895 3896 static inline u8 3897 il4965_tfd_get_num_tbs(struct il_tfd *tfd) 3898 { 3899 return tfd->num_tbs & 0x1f; 3900 } 3901 3902 /* 3903 * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] 3904 * 3905 * Does NOT advance any TFD circular buffer read/write idxes 3906 * Does NOT free the TFD itself (which is within circular buffer) 3907 */ 3908 void 3909 il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq) 3910 { 3911 struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds; 3912 struct il_tfd *tfd; 3913 struct pci_dev *dev = il->pci_dev; 3914 int idx = txq->q.read_ptr; 3915 int i; 3916 int num_tbs; 3917 3918 tfd = &tfd_tmp[idx]; 3919 3920 /* Sanity check on number of chunks */ 3921 num_tbs = il4965_tfd_get_num_tbs(tfd); 3922 3923 if (num_tbs >= IL_NUM_OF_TBS) { 3924 IL_ERR("Too many chunks: %i\n", num_tbs); 3925 /* @todo issue fatal error, it is quite serious situation */ 3926 return; 3927 } 3928 3929 /* Unmap tx_cmd */ 3930 if (num_tbs) 3931 dma_unmap_single(&dev->dev, 3932 dma_unmap_addr(&txq->meta[idx], mapping), 3933 dma_unmap_len(&txq->meta[idx], len), 3934 DMA_BIDIRECTIONAL); 3935 3936 /* Unmap chunks, if any. */ 3937 for (i = 1; i < num_tbs; i++) 3938 dma_unmap_single(&dev->dev, il4965_tfd_tb_get_addr(tfd, i), 3939 il4965_tfd_tb_get_len(tfd, i), DMA_TO_DEVICE); 3940 3941 /* free SKB */ 3942 if (txq->skbs) { 3943 struct sk_buff *skb = txq->skbs[txq->q.read_ptr]; 3944 3945 /* can be called from irqs-disabled context */ 3946 if (skb) { 3947 dev_kfree_skb_any(skb); 3948 txq->skbs[txq->q.read_ptr] = NULL; 3949 } 3950 } 3951 } 3952 3953 int 3954 il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq, 3955 dma_addr_t addr, u16 len, u8 reset, u8 pad) 3956 { 3957 struct il_queue *q; 3958 struct il_tfd *tfd, *tfd_tmp; 3959 u32 num_tbs; 3960 3961 q = &txq->q; 3962 tfd_tmp = (struct il_tfd *)txq->tfds; 3963 tfd = &tfd_tmp[q->write_ptr]; 3964 3965 if (reset) 3966 memset(tfd, 0, sizeof(*tfd)); 3967 3968 num_tbs = il4965_tfd_get_num_tbs(tfd); 3969 3970 /* Each TFD can point to a maximum 20 Tx buffers */ 3971 if (num_tbs >= IL_NUM_OF_TBS) { 3972 IL_ERR("Error can not send more than %d chunks\n", 3973 IL_NUM_OF_TBS); 3974 return -EINVAL; 3975 } 3976 3977 BUG_ON(addr & ~DMA_BIT_MASK(36)); 3978 if (unlikely(addr & ~IL_TX_DMA_MASK)) 3979 IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr); 3980 3981 il4965_tfd_set_tb(tfd, num_tbs, addr, len); 3982 3983 return 0; 3984 } 3985 3986 /* 3987 * Tell nic where to find circular buffer of Tx Frame Descriptors for 3988 * given Tx queue, and enable the DMA channel used for that queue. 3989 * 3990 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA 3991 * channels supported in hardware. 3992 */ 3993 int 3994 il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq) 3995 { 3996 int txq_id = txq->q.id; 3997 3998 /* Circular buffer (TFD queue in DRAM) physical base address */ 3999 il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8); 4000 4001 return 0; 4002 } 4003 4004 /****************************************************************************** 4005 * 4006 * Generic RX handler implementations 4007 * 4008 ******************************************************************************/ 4009 static void 4010 il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb) 4011 { 4012 struct il_rx_pkt *pkt = rxb_addr(rxb); 4013 struct il_alive_resp *palive; 4014 struct delayed_work *pwork; 4015 4016 palive = &pkt->u.alive_frame; 4017 4018 D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n", 4019 palive->is_valid, palive->ver_type, palive->ver_subtype); 4020 4021 if (palive->ver_subtype == INITIALIZE_SUBTYPE) { 4022 D_INFO("Initialization Alive received.\n"); 4023 memcpy(&il->card_alive_init, &pkt->u.raw, 4024 sizeof(struct il_init_alive_resp)); 4025 pwork = &il->init_alive_start; 4026 } else { 4027 D_INFO("Runtime Alive received.\n"); 4028 memcpy(&il->card_alive, &pkt->u.alive_frame, 4029 sizeof(struct il_alive_resp)); 4030 pwork = &il->alive_start; 4031 } 4032 4033 /* We delay the ALIVE response by 5ms to 4034 * give the HW RF Kill time to activate... */ 4035 if (palive->is_valid == UCODE_VALID_OK) 4036 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5)); 4037 else 4038 IL_WARN("uCode did not respond OK.\n"); 4039 } 4040 4041 /* 4042 * il4965_bg_stats_periodic - Timer callback to queue stats 4043 * 4044 * This callback is provided in order to send a stats request. 4045 * 4046 * This timer function is continually reset to execute within 4047 * 60 seconds since the last N_STATS was received. We need to 4048 * ensure we receive the stats in order to update the temperature 4049 * used for calibrating the TXPOWER. 4050 */ 4051 static void 4052 il4965_bg_stats_periodic(struct timer_list *t) 4053 { 4054 struct il_priv *il = from_timer(il, t, stats_periodic); 4055 4056 if (test_bit(S_EXIT_PENDING, &il->status)) 4057 return; 4058 4059 /* dont send host command if rf-kill is on */ 4060 if (!il_is_ready_rf(il)) 4061 return; 4062 4063 il_send_stats_request(il, CMD_ASYNC, false); 4064 } 4065 4066 static void 4067 il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb) 4068 { 4069 struct il_rx_pkt *pkt = rxb_addr(rxb); 4070 struct il4965_beacon_notif *beacon = 4071 (struct il4965_beacon_notif *)pkt->u.raw; 4072 #ifdef CONFIG_IWLEGACY_DEBUG 4073 u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); 4074 4075 D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n", 4076 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK, 4077 beacon->beacon_notify_hdr.failure_frame, 4078 le32_to_cpu(beacon->ibss_mgr_status), 4079 le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate); 4080 #endif 4081 il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); 4082 } 4083 4084 static void 4085 il4965_perform_ct_kill_task(struct il_priv *il) 4086 { 4087 unsigned long flags; 4088 4089 D_POWER("Stop all queues\n"); 4090 4091 if (il->mac80211_registered) 4092 ieee80211_stop_queues(il->hw); 4093 4094 _il_wr(il, CSR_UCODE_DRV_GP1_SET, 4095 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); 4096 _il_rd(il, CSR_UCODE_DRV_GP1); 4097 4098 spin_lock_irqsave(&il->reg_lock, flags); 4099 if (likely(_il_grab_nic_access(il))) 4100 _il_release_nic_access(il); 4101 spin_unlock_irqrestore(&il->reg_lock, flags); 4102 } 4103 4104 /* Handle notification from uCode that card's power state is changing 4105 * due to software, hardware, or critical temperature RFKILL */ 4106 static void 4107 il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb) 4108 { 4109 struct il_rx_pkt *pkt = rxb_addr(rxb); 4110 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); 4111 unsigned long status = il->status; 4112 4113 D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n", 4114 (flags & HW_CARD_DISABLED) ? "Kill" : "On", 4115 (flags & SW_CARD_DISABLED) ? "Kill" : "On", 4116 (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached"); 4117 4118 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) { 4119 4120 _il_wr(il, CSR_UCODE_DRV_GP1_SET, 4121 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 4122 4123 il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); 4124 4125 if (!(flags & RXON_CARD_DISABLED)) { 4126 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, 4127 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 4128 il_wr(il, HBUS_TARG_MBX_C, 4129 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); 4130 } 4131 } 4132 4133 if (flags & CT_CARD_DISABLED) 4134 il4965_perform_ct_kill_task(il); 4135 4136 if (flags & HW_CARD_DISABLED) 4137 set_bit(S_RFKILL, &il->status); 4138 else 4139 clear_bit(S_RFKILL, &il->status); 4140 4141 if (!(flags & RXON_CARD_DISABLED)) 4142 il_scan_cancel(il); 4143 4144 if ((test_bit(S_RFKILL, &status) != 4145 test_bit(S_RFKILL, &il->status))) 4146 wiphy_rfkill_set_hw_state(il->hw->wiphy, 4147 test_bit(S_RFKILL, &il->status)); 4148 else 4149 wake_up(&il->wait_command_queue); 4150 } 4151 4152 /* 4153 * il4965_setup_handlers - Initialize Rx handler callbacks 4154 * 4155 * Setup the RX handlers for each of the reply types sent from the uCode 4156 * to the host. 4157 * 4158 * This function chains into the hardware specific files for them to setup 4159 * any hardware specific handlers as well. 4160 */ 4161 static void 4162 il4965_setup_handlers(struct il_priv *il) 4163 { 4164 il->handlers[N_ALIVE] = il4965_hdl_alive; 4165 il->handlers[N_ERROR] = il_hdl_error; 4166 il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa; 4167 il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement; 4168 il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep; 4169 il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats; 4170 il->handlers[N_BEACON] = il4965_hdl_beacon; 4171 4172 /* 4173 * The same handler is used for both the REPLY to a discrete 4174 * stats request from the host as well as for the periodic 4175 * stats notifications (after received beacons) from the uCode. 4176 */ 4177 il->handlers[C_STATS] = il4965_hdl_c_stats; 4178 il->handlers[N_STATS] = il4965_hdl_stats; 4179 4180 il_setup_rx_scan_handlers(il); 4181 4182 /* status change handler */ 4183 il->handlers[N_CARD_STATE] = il4965_hdl_card_state; 4184 4185 il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon; 4186 /* Rx handlers */ 4187 il->handlers[N_RX_PHY] = il4965_hdl_rx_phy; 4188 il->handlers[N_RX_MPDU] = il4965_hdl_rx; 4189 il->handlers[N_RX] = il4965_hdl_rx; 4190 /* block ack */ 4191 il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba; 4192 /* Tx response */ 4193 il->handlers[C_TX] = il4965_hdl_tx; 4194 } 4195 4196 /* 4197 * il4965_rx_handle - Main entry function for receiving responses from uCode 4198 * 4199 * Uses the il->handlers callback function array to invoke 4200 * the appropriate handlers, including command responses, 4201 * frame-received notifications, and other notifications. 4202 */ 4203 void 4204 il4965_rx_handle(struct il_priv *il) 4205 { 4206 struct il_rx_buf *rxb; 4207 struct il_rx_pkt *pkt; 4208 struct il_rx_queue *rxq = &il->rxq; 4209 u32 r, i; 4210 int reclaim; 4211 unsigned long flags; 4212 u8 fill_rx = 0; 4213 u32 count = 8; 4214 int total_empty; 4215 4216 /* uCode's read idx (stored in shared DRAM) indicates the last Rx 4217 * buffer that the driver may process (last buffer filled by ucode). */ 4218 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; 4219 i = rxq->read; 4220 4221 /* Rx interrupt, but nothing sent from uCode */ 4222 if (i == r) 4223 D_RX("r = %d, i = %d\n", r, i); 4224 4225 /* calculate total frames need to be restock after handling RX */ 4226 total_empty = r - rxq->write_actual; 4227 if (total_empty < 0) 4228 total_empty += RX_QUEUE_SIZE; 4229 4230 if (total_empty > (RX_QUEUE_SIZE / 2)) 4231 fill_rx = 1; 4232 4233 while (i != r) { 4234 int len; 4235 4236 rxb = rxq->queue[i]; 4237 4238 /* If an RXB doesn't have a Rx queue slot associated with it, 4239 * then a bug has been introduced in the queue refilling 4240 * routines -- catch it here */ 4241 BUG_ON(rxb == NULL); 4242 4243 rxq->queue[i] = NULL; 4244 4245 dma_unmap_page(&il->pci_dev->dev, rxb->page_dma, 4246 PAGE_SIZE << il->hw_params.rx_page_order, 4247 DMA_FROM_DEVICE); 4248 pkt = rxb_addr(rxb); 4249 4250 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK; 4251 len += sizeof(u32); /* account for status word */ 4252 4253 reclaim = il_need_reclaim(il, pkt); 4254 4255 /* Based on type of command response or notification, 4256 * handle those that need handling via function in 4257 * handlers table. See il4965_setup_handlers() */ 4258 if (il->handlers[pkt->hdr.cmd]) { 4259 D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i, 4260 il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); 4261 il->isr_stats.handlers[pkt->hdr.cmd]++; 4262 il->handlers[pkt->hdr.cmd] (il, rxb); 4263 } else { 4264 /* No handling needed */ 4265 D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r, 4266 i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); 4267 } 4268 4269 /* 4270 * XXX: After here, we should always check rxb->page 4271 * against NULL before touching it or its virtual 4272 * memory (pkt). Because some handler might have 4273 * already taken or freed the pages. 4274 */ 4275 4276 if (reclaim) { 4277 /* Invoke any callbacks, transfer the buffer to caller, 4278 * and fire off the (possibly) blocking il_send_cmd() 4279 * as we reclaim the driver command queue */ 4280 if (rxb->page) 4281 il_tx_cmd_complete(il, rxb); 4282 else 4283 IL_WARN("Claim null rxb?\n"); 4284 } 4285 4286 /* Reuse the page if possible. For notification packets and 4287 * SKBs that fail to Rx correctly, add them back into the 4288 * rx_free list for reuse later. */ 4289 spin_lock_irqsave(&rxq->lock, flags); 4290 if (rxb->page != NULL) { 4291 rxb->page_dma = 4292 dma_map_page(&il->pci_dev->dev, rxb->page, 0, 4293 PAGE_SIZE << il->hw_params.rx_page_order, 4294 DMA_FROM_DEVICE); 4295 4296 if (unlikely(dma_mapping_error(&il->pci_dev->dev, 4297 rxb->page_dma))) { 4298 __il_free_pages(il, rxb->page); 4299 rxb->page = NULL; 4300 list_add_tail(&rxb->list, &rxq->rx_used); 4301 } else { 4302 list_add_tail(&rxb->list, &rxq->rx_free); 4303 rxq->free_count++; 4304 } 4305 } else 4306 list_add_tail(&rxb->list, &rxq->rx_used); 4307 4308 spin_unlock_irqrestore(&rxq->lock, flags); 4309 4310 i = (i + 1) & RX_QUEUE_MASK; 4311 /* If there are a lot of unused frames, 4312 * restock the Rx queue so ucode wont assert. */ 4313 if (fill_rx) { 4314 count++; 4315 if (count >= 8) { 4316 rxq->read = i; 4317 il4965_rx_replenish_now(il); 4318 count = 0; 4319 } 4320 } 4321 } 4322 4323 /* Backtrack one entry */ 4324 rxq->read = i; 4325 if (fill_rx) 4326 il4965_rx_replenish_now(il); 4327 else 4328 il4965_rx_queue_restock(il); 4329 } 4330 4331 /* call this function to flush any scheduled tasklet */ 4332 static inline void 4333 il4965_synchronize_irq(struct il_priv *il) 4334 { 4335 /* wait to make sure we flush pending tasklet */ 4336 synchronize_irq(il->pci_dev->irq); 4337 tasklet_kill(&il->irq_tasklet); 4338 } 4339 4340 static void 4341 il4965_irq_tasklet(struct tasklet_struct *t) 4342 { 4343 struct il_priv *il = from_tasklet(il, t, irq_tasklet); 4344 u32 inta, handled = 0; 4345 u32 inta_fh; 4346 unsigned long flags; 4347 u32 i; 4348 #ifdef CONFIG_IWLEGACY_DEBUG 4349 u32 inta_mask; 4350 #endif 4351 4352 spin_lock_irqsave(&il->lock, flags); 4353 4354 /* Ack/clear/reset pending uCode interrupts. 4355 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, 4356 * and will clear only when CSR_FH_INT_STATUS gets cleared. */ 4357 inta = _il_rd(il, CSR_INT); 4358 _il_wr(il, CSR_INT, inta); 4359 4360 /* Ack/clear/reset pending flow-handler (DMA) interrupts. 4361 * Any new interrupts that happen after this, either while we're 4362 * in this tasklet, or later, will show up in next ISR/tasklet. */ 4363 inta_fh = _il_rd(il, CSR_FH_INT_STATUS); 4364 _il_wr(il, CSR_FH_INT_STATUS, inta_fh); 4365 4366 #ifdef CONFIG_IWLEGACY_DEBUG 4367 if (il_get_debug_level(il) & IL_DL_ISR) { 4368 /* just for debug */ 4369 inta_mask = _il_rd(il, CSR_INT_MASK); 4370 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, 4371 inta_mask, inta_fh); 4372 } 4373 #endif 4374 4375 spin_unlock_irqrestore(&il->lock, flags); 4376 4377 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not 4378 * atomic, make sure that inta covers all the interrupts that 4379 * we've discovered, even if FH interrupt came in just after 4380 * reading CSR_INT. */ 4381 if (inta_fh & CSR49_FH_INT_RX_MASK) 4382 inta |= CSR_INT_BIT_FH_RX; 4383 if (inta_fh & CSR49_FH_INT_TX_MASK) 4384 inta |= CSR_INT_BIT_FH_TX; 4385 4386 /* Now service all interrupt bits discovered above. */ 4387 if (inta & CSR_INT_BIT_HW_ERR) { 4388 IL_ERR("Hardware error detected. Restarting.\n"); 4389 4390 /* Tell the device to stop sending interrupts */ 4391 il_disable_interrupts(il); 4392 4393 il->isr_stats.hw++; 4394 il_irq_handle_error(il); 4395 4396 handled |= CSR_INT_BIT_HW_ERR; 4397 4398 return; 4399 } 4400 #ifdef CONFIG_IWLEGACY_DEBUG 4401 if (il_get_debug_level(il) & (IL_DL_ISR)) { 4402 /* NIC fires this, but we don't use it, redundant with WAKEUP */ 4403 if (inta & CSR_INT_BIT_SCD) { 4404 D_ISR("Scheduler finished to transmit " 4405 "the frame/frames.\n"); 4406 il->isr_stats.sch++; 4407 } 4408 4409 /* Alive notification via Rx interrupt will do the real work */ 4410 if (inta & CSR_INT_BIT_ALIVE) { 4411 D_ISR("Alive interrupt\n"); 4412 il->isr_stats.alive++; 4413 } 4414 } 4415 #endif 4416 /* Safely ignore these bits for debug checks below */ 4417 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); 4418 4419 /* HW RF KILL switch toggled */ 4420 if (inta & CSR_INT_BIT_RF_KILL) { 4421 int hw_rf_kill = 0; 4422 4423 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) 4424 hw_rf_kill = 1; 4425 4426 IL_WARN("RF_KILL bit toggled to %s.\n", 4427 hw_rf_kill ? "disable radio" : "enable radio"); 4428 4429 il->isr_stats.rfkill++; 4430 4431 /* driver only loads ucode once setting the interface up. 4432 * the driver allows loading the ucode even if the radio 4433 * is killed. Hence update the killswitch state here. The 4434 * rfkill handler will care about restarting if needed. 4435 */ 4436 if (hw_rf_kill) { 4437 set_bit(S_RFKILL, &il->status); 4438 } else { 4439 clear_bit(S_RFKILL, &il->status); 4440 il_force_reset(il, true); 4441 } 4442 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill); 4443 4444 handled |= CSR_INT_BIT_RF_KILL; 4445 } 4446 4447 /* Chip got too hot and stopped itself */ 4448 if (inta & CSR_INT_BIT_CT_KILL) { 4449 IL_ERR("Microcode CT kill error detected.\n"); 4450 il->isr_stats.ctkill++; 4451 handled |= CSR_INT_BIT_CT_KILL; 4452 } 4453 4454 /* Error detected by uCode */ 4455 if (inta & CSR_INT_BIT_SW_ERR) { 4456 IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n", 4457 inta); 4458 il->isr_stats.sw++; 4459 il_irq_handle_error(il); 4460 handled |= CSR_INT_BIT_SW_ERR; 4461 } 4462 4463 /* 4464 * uCode wakes up after power-down sleep. 4465 * Tell device about any new tx or host commands enqueued, 4466 * and about any Rx buffers made available while asleep. 4467 */ 4468 if (inta & CSR_INT_BIT_WAKEUP) { 4469 D_ISR("Wakeup interrupt\n"); 4470 il_rx_queue_update_write_ptr(il, &il->rxq); 4471 for (i = 0; i < il->hw_params.max_txq_num; i++) 4472 il_txq_update_write_ptr(il, &il->txq[i]); 4473 il->isr_stats.wakeup++; 4474 handled |= CSR_INT_BIT_WAKEUP; 4475 } 4476 4477 /* All uCode command responses, including Tx command responses, 4478 * Rx "responses" (frame-received notification), and other 4479 * notifications from uCode come through here*/ 4480 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { 4481 il4965_rx_handle(il); 4482 il->isr_stats.rx++; 4483 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); 4484 } 4485 4486 /* This "Tx" DMA channel is used only for loading uCode */ 4487 if (inta & CSR_INT_BIT_FH_TX) { 4488 D_ISR("uCode load interrupt\n"); 4489 il->isr_stats.tx++; 4490 handled |= CSR_INT_BIT_FH_TX; 4491 /* Wake up uCode load routine, now that load is complete */ 4492 il->ucode_write_complete = 1; 4493 wake_up(&il->wait_command_queue); 4494 } 4495 4496 if (inta & ~handled) { 4497 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled); 4498 il->isr_stats.unhandled++; 4499 } 4500 4501 if (inta & ~(il->inta_mask)) { 4502 IL_WARN("Disabled INTA bits 0x%08x were pending\n", 4503 inta & ~il->inta_mask); 4504 IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh); 4505 } 4506 4507 /* Re-enable all interrupts */ 4508 /* only Re-enable if disabled by irq */ 4509 if (test_bit(S_INT_ENABLED, &il->status)) 4510 il_enable_interrupts(il); 4511 /* Re-enable RF_KILL if it occurred */ 4512 else if (handled & CSR_INT_BIT_RF_KILL) 4513 il_enable_rfkill_int(il); 4514 4515 #ifdef CONFIG_IWLEGACY_DEBUG 4516 if (il_get_debug_level(il) & (IL_DL_ISR)) { 4517 inta = _il_rd(il, CSR_INT); 4518 inta_mask = _il_rd(il, CSR_INT_MASK); 4519 inta_fh = _il_rd(il, CSR_FH_INT_STATUS); 4520 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " 4521 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); 4522 } 4523 #endif 4524 } 4525 4526 /***************************************************************************** 4527 * 4528 * sysfs attributes 4529 * 4530 *****************************************************************************/ 4531 4532 #ifdef CONFIG_IWLEGACY_DEBUG 4533 4534 /* 4535 * The following adds a new attribute to the sysfs representation 4536 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/) 4537 * used for controlling the debug level. 4538 * 4539 * See the level definitions in iwl for details. 4540 * 4541 * The debug_level being managed using sysfs below is a per device debug 4542 * level that is used instead of the global debug level if it (the per 4543 * device debug level) is set. 4544 */ 4545 static ssize_t 4546 il4965_show_debug_level(struct device *d, struct device_attribute *attr, 4547 char *buf) 4548 { 4549 struct il_priv *il = dev_get_drvdata(d); 4550 return sprintf(buf, "0x%08X\n", il_get_debug_level(il)); 4551 } 4552 4553 static ssize_t 4554 il4965_store_debug_level(struct device *d, struct device_attribute *attr, 4555 const char *buf, size_t count) 4556 { 4557 struct il_priv *il = dev_get_drvdata(d); 4558 unsigned long val; 4559 int ret; 4560 4561 ret = kstrtoul(buf, 0, &val); 4562 if (ret) 4563 IL_ERR("%s is not in hex or decimal form.\n", buf); 4564 else 4565 il->debug_level = val; 4566 4567 return strnlen(buf, count); 4568 } 4569 4570 static DEVICE_ATTR(debug_level, 0644, il4965_show_debug_level, 4571 il4965_store_debug_level); 4572 4573 #endif /* CONFIG_IWLEGACY_DEBUG */ 4574 4575 static ssize_t 4576 il4965_show_temperature(struct device *d, struct device_attribute *attr, 4577 char *buf) 4578 { 4579 struct il_priv *il = dev_get_drvdata(d); 4580 4581 if (!il_is_alive(il)) 4582 return -EAGAIN; 4583 4584 return sprintf(buf, "%d\n", il->temperature); 4585 } 4586 4587 static DEVICE_ATTR(temperature, 0444, il4965_show_temperature, NULL); 4588 4589 static ssize_t 4590 il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf) 4591 { 4592 struct il_priv *il = dev_get_drvdata(d); 4593 4594 if (!il_is_ready_rf(il)) 4595 return sprintf(buf, "off\n"); 4596 else 4597 return sprintf(buf, "%d\n", il->tx_power_user_lmt); 4598 } 4599 4600 static ssize_t 4601 il4965_store_tx_power(struct device *d, struct device_attribute *attr, 4602 const char *buf, size_t count) 4603 { 4604 struct il_priv *il = dev_get_drvdata(d); 4605 unsigned long val; 4606 int ret; 4607 4608 ret = kstrtoul(buf, 10, &val); 4609 if (ret) 4610 IL_INFO("%s is not in decimal form.\n", buf); 4611 else { 4612 ret = il_set_tx_power(il, val, false); 4613 if (ret) 4614 IL_ERR("failed setting tx power (0x%08x).\n", ret); 4615 else 4616 ret = count; 4617 } 4618 return ret; 4619 } 4620 4621 static DEVICE_ATTR(tx_power, 0644, il4965_show_tx_power, 4622 il4965_store_tx_power); 4623 4624 static struct attribute *il_sysfs_entries[] = { 4625 &dev_attr_temperature.attr, 4626 &dev_attr_tx_power.attr, 4627 #ifdef CONFIG_IWLEGACY_DEBUG 4628 &dev_attr_debug_level.attr, 4629 #endif 4630 NULL 4631 }; 4632 4633 static const struct attribute_group il_attribute_group = { 4634 .name = NULL, /* put in device directory */ 4635 .attrs = il_sysfs_entries, 4636 }; 4637 4638 /****************************************************************************** 4639 * 4640 * uCode download functions 4641 * 4642 ******************************************************************************/ 4643 4644 static void 4645 il4965_dealloc_ucode_pci(struct il_priv *il) 4646 { 4647 il_free_fw_desc(il->pci_dev, &il->ucode_code); 4648 il_free_fw_desc(il->pci_dev, &il->ucode_data); 4649 il_free_fw_desc(il->pci_dev, &il->ucode_data_backup); 4650 il_free_fw_desc(il->pci_dev, &il->ucode_init); 4651 il_free_fw_desc(il->pci_dev, &il->ucode_init_data); 4652 il_free_fw_desc(il->pci_dev, &il->ucode_boot); 4653 } 4654 4655 static void 4656 il4965_nic_start(struct il_priv *il) 4657 { 4658 /* Remove all resets to allow NIC to operate */ 4659 _il_wr(il, CSR_RESET, 0); 4660 } 4661 4662 static void il4965_ucode_callback(const struct firmware *ucode_raw, 4663 void *context); 4664 static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length); 4665 4666 static int __must_check 4667 il4965_request_firmware(struct il_priv *il, bool first) 4668 { 4669 const char *name_pre = il->cfg->fw_name_pre; 4670 char tag[8]; 4671 4672 if (first) { 4673 il->fw_idx = il->cfg->ucode_api_max; 4674 sprintf(tag, "%d", il->fw_idx); 4675 } else { 4676 il->fw_idx--; 4677 sprintf(tag, "%d", il->fw_idx); 4678 } 4679 4680 if (il->fw_idx < il->cfg->ucode_api_min) { 4681 IL_ERR("no suitable firmware found!\n"); 4682 return -ENOENT; 4683 } 4684 4685 sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode"); 4686 4687 D_INFO("attempting to load firmware '%s'\n", il->firmware_name); 4688 4689 return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name, 4690 &il->pci_dev->dev, GFP_KERNEL, il, 4691 il4965_ucode_callback); 4692 } 4693 4694 struct il4965_firmware_pieces { 4695 const void *inst, *data, *init, *init_data, *boot; 4696 size_t inst_size, data_size, init_size, init_data_size, boot_size; 4697 }; 4698 4699 static int 4700 il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw, 4701 struct il4965_firmware_pieces *pieces) 4702 { 4703 struct il_ucode_header *ucode = (void *)ucode_raw->data; 4704 u32 api_ver, hdr_size; 4705 const u8 *src; 4706 4707 il->ucode_ver = le32_to_cpu(ucode->ver); 4708 api_ver = IL_UCODE_API(il->ucode_ver); 4709 4710 switch (api_ver) { 4711 default: 4712 case 0: 4713 case 1: 4714 case 2: 4715 hdr_size = 24; 4716 if (ucode_raw->size < hdr_size) { 4717 IL_ERR("File size too small!\n"); 4718 return -EINVAL; 4719 } 4720 pieces->inst_size = le32_to_cpu(ucode->v1.inst_size); 4721 pieces->data_size = le32_to_cpu(ucode->v1.data_size); 4722 pieces->init_size = le32_to_cpu(ucode->v1.init_size); 4723 pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size); 4724 pieces->boot_size = le32_to_cpu(ucode->v1.boot_size); 4725 src = ucode->v1.data; 4726 break; 4727 } 4728 4729 /* Verify size of file vs. image size info in file's header */ 4730 if (ucode_raw->size != 4731 hdr_size + pieces->inst_size + pieces->data_size + 4732 pieces->init_size + pieces->init_data_size + pieces->boot_size) { 4733 4734 IL_ERR("uCode file size %d does not match expected size\n", 4735 (int)ucode_raw->size); 4736 return -EINVAL; 4737 } 4738 4739 pieces->inst = src; 4740 src += pieces->inst_size; 4741 pieces->data = src; 4742 src += pieces->data_size; 4743 pieces->init = src; 4744 src += pieces->init_size; 4745 pieces->init_data = src; 4746 src += pieces->init_data_size; 4747 pieces->boot = src; 4748 src += pieces->boot_size; 4749 4750 return 0; 4751 } 4752 4753 /* 4754 * il4965_ucode_callback - callback when firmware was loaded 4755 * 4756 * If loaded successfully, copies the firmware into buffers 4757 * for the card to fetch (via DMA). 4758 */ 4759 static void 4760 il4965_ucode_callback(const struct firmware *ucode_raw, void *context) 4761 { 4762 struct il_priv *il = context; 4763 int err; 4764 struct il4965_firmware_pieces pieces; 4765 const unsigned int api_max = il->cfg->ucode_api_max; 4766 const unsigned int api_min = il->cfg->ucode_api_min; 4767 u32 api_ver; 4768 4769 u32 max_probe_length = 200; 4770 u32 standard_phy_calibration_size = 4771 IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE; 4772 4773 memset(&pieces, 0, sizeof(pieces)); 4774 4775 if (!ucode_raw) { 4776 if (il->fw_idx <= il->cfg->ucode_api_max) 4777 IL_ERR("request for firmware file '%s' failed.\n", 4778 il->firmware_name); 4779 goto try_again; 4780 } 4781 4782 D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name, 4783 ucode_raw->size); 4784 4785 /* Make sure that we got at least the API version number */ 4786 if (ucode_raw->size < 4) { 4787 IL_ERR("File size way too small!\n"); 4788 goto try_again; 4789 } 4790 4791 /* Data from ucode file: header followed by uCode images */ 4792 err = il4965_load_firmware(il, ucode_raw, &pieces); 4793 4794 if (err) 4795 goto try_again; 4796 4797 api_ver = IL_UCODE_API(il->ucode_ver); 4798 4799 /* 4800 * api_ver should match the api version forming part of the 4801 * firmware filename ... but we don't check for that and only rely 4802 * on the API version read from firmware header from here on forward 4803 */ 4804 if (api_ver < api_min || api_ver > api_max) { 4805 IL_ERR("Driver unable to support your firmware API. " 4806 "Driver supports v%u, firmware is v%u.\n", api_max, 4807 api_ver); 4808 goto try_again; 4809 } 4810 4811 if (api_ver != api_max) 4812 IL_ERR("Firmware has old API version. Expected v%u, " 4813 "got v%u. New firmware can be obtained " 4814 "from http://www.intellinuxwireless.org.\n", api_max, 4815 api_ver); 4816 4817 IL_INFO("loaded firmware version %u.%u.%u.%u\n", 4818 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver), 4819 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver)); 4820 4821 snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version), 4822 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver), 4823 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver), 4824 IL_UCODE_SERIAL(il->ucode_ver)); 4825 4826 /* 4827 * For any of the failures below (before allocating pci memory) 4828 * we will try to load a version with a smaller API -- maybe the 4829 * user just got a corrupted version of the latest API. 4830 */ 4831 4832 D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver); 4833 D_INFO("f/w package hdr runtime inst size = %zd\n", pieces.inst_size); 4834 D_INFO("f/w package hdr runtime data size = %zd\n", pieces.data_size); 4835 D_INFO("f/w package hdr init inst size = %zd\n", pieces.init_size); 4836 D_INFO("f/w package hdr init data size = %zd\n", pieces.init_data_size); 4837 D_INFO("f/w package hdr boot inst size = %zd\n", pieces.boot_size); 4838 4839 /* Verify that uCode images will fit in card's SRAM */ 4840 if (pieces.inst_size > il->hw_params.max_inst_size) { 4841 IL_ERR("uCode instr len %zd too large to fit in\n", 4842 pieces.inst_size); 4843 goto try_again; 4844 } 4845 4846 if (pieces.data_size > il->hw_params.max_data_size) { 4847 IL_ERR("uCode data len %zd too large to fit in\n", 4848 pieces.data_size); 4849 goto try_again; 4850 } 4851 4852 if (pieces.init_size > il->hw_params.max_inst_size) { 4853 IL_ERR("uCode init instr len %zd too large to fit in\n", 4854 pieces.init_size); 4855 goto try_again; 4856 } 4857 4858 if (pieces.init_data_size > il->hw_params.max_data_size) { 4859 IL_ERR("uCode init data len %zd too large to fit in\n", 4860 pieces.init_data_size); 4861 goto try_again; 4862 } 4863 4864 if (pieces.boot_size > il->hw_params.max_bsm_size) { 4865 IL_ERR("uCode boot instr len %zd too large to fit in\n", 4866 pieces.boot_size); 4867 goto try_again; 4868 } 4869 4870 /* Allocate ucode buffers for card's bus-master loading ... */ 4871 4872 /* Runtime instructions and 2 copies of data: 4873 * 1) unmodified from disk 4874 * 2) backup cache for save/restore during power-downs */ 4875 il->ucode_code.len = pieces.inst_size; 4876 il_alloc_fw_desc(il->pci_dev, &il->ucode_code); 4877 4878 il->ucode_data.len = pieces.data_size; 4879 il_alloc_fw_desc(il->pci_dev, &il->ucode_data); 4880 4881 il->ucode_data_backup.len = pieces.data_size; 4882 il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup); 4883 4884 if (!il->ucode_code.v_addr || !il->ucode_data.v_addr || 4885 !il->ucode_data_backup.v_addr) 4886 goto err_pci_alloc; 4887 4888 /* Initialization instructions and data */ 4889 if (pieces.init_size && pieces.init_data_size) { 4890 il->ucode_init.len = pieces.init_size; 4891 il_alloc_fw_desc(il->pci_dev, &il->ucode_init); 4892 4893 il->ucode_init_data.len = pieces.init_data_size; 4894 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data); 4895 4896 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr) 4897 goto err_pci_alloc; 4898 } 4899 4900 /* Bootstrap (instructions only, no data) */ 4901 if (pieces.boot_size) { 4902 il->ucode_boot.len = pieces.boot_size; 4903 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot); 4904 4905 if (!il->ucode_boot.v_addr) 4906 goto err_pci_alloc; 4907 } 4908 4909 /* Now that we can no longer fail, copy information */ 4910 4911 il->sta_key_max_num = STA_KEY_MAX_NUM; 4912 4913 /* Copy images into buffers for card's bus-master reads ... */ 4914 4915 /* Runtime instructions (first block of data in file) */ 4916 D_INFO("Copying (but not loading) uCode instr len %zd\n", 4917 pieces.inst_size); 4918 memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size); 4919 4920 D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", 4921 il->ucode_code.v_addr, (u32) il->ucode_code.p_addr); 4922 4923 /* 4924 * Runtime data 4925 * NOTE: Copy into backup buffer will be done in il_up() 4926 */ 4927 D_INFO("Copying (but not loading) uCode data len %zd\n", 4928 pieces.data_size); 4929 memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size); 4930 memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size); 4931 4932 /* Initialization instructions */ 4933 if (pieces.init_size) { 4934 D_INFO("Copying (but not loading) init instr len %zd\n", 4935 pieces.init_size); 4936 memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size); 4937 } 4938 4939 /* Initialization data */ 4940 if (pieces.init_data_size) { 4941 D_INFO("Copying (but not loading) init data len %zd\n", 4942 pieces.init_data_size); 4943 memcpy(il->ucode_init_data.v_addr, pieces.init_data, 4944 pieces.init_data_size); 4945 } 4946 4947 /* Bootstrap instructions */ 4948 D_INFO("Copying (but not loading) boot instr len %zd\n", 4949 pieces.boot_size); 4950 memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size); 4951 4952 /* 4953 * figure out the offset of chain noise reset and gain commands 4954 * base on the size of standard phy calibration commands table size 4955 */ 4956 il->_4965.phy_calib_chain_noise_reset_cmd = 4957 standard_phy_calibration_size; 4958 il->_4965.phy_calib_chain_noise_gain_cmd = 4959 standard_phy_calibration_size + 1; 4960 4961 /************************************************** 4962 * This is still part of probe() in a sense... 4963 * 4964 * 9. Setup and register with mac80211 and debugfs 4965 **************************************************/ 4966 err = il4965_mac_setup_register(il, max_probe_length); 4967 if (err) 4968 goto out_unbind; 4969 4970 il_dbgfs_register(il, DRV_NAME); 4971 4972 err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group); 4973 if (err) { 4974 IL_ERR("failed to create sysfs device attributes\n"); 4975 goto out_unbind; 4976 } 4977 4978 /* We have our copies now, allow OS release its copies */ 4979 release_firmware(ucode_raw); 4980 complete(&il->_4965.firmware_loading_complete); 4981 return; 4982 4983 try_again: 4984 /* try next, if any */ 4985 if (il4965_request_firmware(il, false)) 4986 goto out_unbind; 4987 release_firmware(ucode_raw); 4988 return; 4989 4990 err_pci_alloc: 4991 IL_ERR("failed to allocate pci memory\n"); 4992 il4965_dealloc_ucode_pci(il); 4993 out_unbind: 4994 complete(&il->_4965.firmware_loading_complete); 4995 device_release_driver(&il->pci_dev->dev); 4996 release_firmware(ucode_raw); 4997 } 4998 4999 static const char *const desc_lookup_text[] = { 5000 "OK", 5001 "FAIL", 5002 "BAD_PARAM", 5003 "BAD_CHECKSUM", 5004 "NMI_INTERRUPT_WDG", 5005 "SYSASSERT", 5006 "FATAL_ERROR", 5007 "BAD_COMMAND", 5008 "HW_ERROR_TUNE_LOCK", 5009 "HW_ERROR_TEMPERATURE", 5010 "ILLEGAL_CHAN_FREQ", 5011 "VCC_NOT_STBL", 5012 "FH49_ERROR", 5013 "NMI_INTERRUPT_HOST", 5014 "NMI_INTERRUPT_ACTION_PT", 5015 "NMI_INTERRUPT_UNKNOWN", 5016 "UCODE_VERSION_MISMATCH", 5017 "HW_ERROR_ABS_LOCK", 5018 "HW_ERROR_CAL_LOCK_FAIL", 5019 "NMI_INTERRUPT_INST_ACTION_PT", 5020 "NMI_INTERRUPT_DATA_ACTION_PT", 5021 "NMI_TRM_HW_ER", 5022 "NMI_INTERRUPT_TRM", 5023 "NMI_INTERRUPT_BREAK_POINT", 5024 "DEBUG_0", 5025 "DEBUG_1", 5026 "DEBUG_2", 5027 "DEBUG_3", 5028 }; 5029 5030 static struct { 5031 char *name; 5032 u8 num; 5033 } advanced_lookup[] = { 5034 { 5035 "NMI_INTERRUPT_WDG", 0x34}, { 5036 "SYSASSERT", 0x35}, { 5037 "UCODE_VERSION_MISMATCH", 0x37}, { 5038 "BAD_COMMAND", 0x38}, { 5039 "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, { 5040 "FATAL_ERROR", 0x3D}, { 5041 "NMI_TRM_HW_ERR", 0x46}, { 5042 "NMI_INTERRUPT_TRM", 0x4C}, { 5043 "NMI_INTERRUPT_BREAK_POINT", 0x54}, { 5044 "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, { 5045 "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, { 5046 "NMI_INTERRUPT_HOST", 0x66}, { 5047 "NMI_INTERRUPT_ACTION_PT", 0x7C}, { 5048 "NMI_INTERRUPT_UNKNOWN", 0x84}, { 5049 "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, { 5050 "ADVANCED_SYSASSERT", 0},}; 5051 5052 static const char * 5053 il4965_desc_lookup(u32 num) 5054 { 5055 int i; 5056 int max = ARRAY_SIZE(desc_lookup_text); 5057 5058 if (num < max) 5059 return desc_lookup_text[num]; 5060 5061 max = ARRAY_SIZE(advanced_lookup) - 1; 5062 for (i = 0; i < max; i++) { 5063 if (advanced_lookup[i].num == num) 5064 break; 5065 } 5066 return advanced_lookup[i].name; 5067 } 5068 5069 #define ERROR_START_OFFSET (1 * sizeof(u32)) 5070 #define ERROR_ELEM_SIZE (7 * sizeof(u32)) 5071 5072 void 5073 il4965_dump_nic_error_log(struct il_priv *il) 5074 { 5075 u32 data2, line; 5076 u32 desc, time, count, base, data1; 5077 u32 blink1, blink2, ilink1, ilink2; 5078 u32 pc, hcmd; 5079 5080 if (il->ucode_type == UCODE_INIT) 5081 base = le32_to_cpu(il->card_alive_init.error_event_table_ptr); 5082 else 5083 base = le32_to_cpu(il->card_alive.error_event_table_ptr); 5084 5085 if (!il->ops->is_valid_rtc_data_addr(base)) { 5086 IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n", 5087 base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT"); 5088 return; 5089 } 5090 5091 count = il_read_targ_mem(il, base); 5092 5093 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { 5094 IL_ERR("Start IWL Error Log Dump:\n"); 5095 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count); 5096 } 5097 5098 desc = il_read_targ_mem(il, base + 1 * sizeof(u32)); 5099 il->isr_stats.err_code = desc; 5100 pc = il_read_targ_mem(il, base + 2 * sizeof(u32)); 5101 blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32)); 5102 blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32)); 5103 ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32)); 5104 ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32)); 5105 data1 = il_read_targ_mem(il, base + 7 * sizeof(u32)); 5106 data2 = il_read_targ_mem(il, base + 8 * sizeof(u32)); 5107 line = il_read_targ_mem(il, base + 9 * sizeof(u32)); 5108 time = il_read_targ_mem(il, base + 11 * sizeof(u32)); 5109 hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32)); 5110 5111 IL_ERR("Desc Time " 5112 "data1 data2 line\n"); 5113 IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n", 5114 il4965_desc_lookup(desc), desc, time, data1, data2, line); 5115 IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n"); 5116 IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1, 5117 blink2, ilink1, ilink2, hcmd); 5118 } 5119 5120 static void 5121 il4965_rf_kill_ct_config(struct il_priv *il) 5122 { 5123 struct il_ct_kill_config cmd; 5124 unsigned long flags; 5125 int ret = 0; 5126 5127 spin_lock_irqsave(&il->lock, flags); 5128 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, 5129 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); 5130 spin_unlock_irqrestore(&il->lock, flags); 5131 5132 cmd.critical_temperature_R = 5133 cpu_to_le32(il->hw_params.ct_kill_threshold); 5134 5135 ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd); 5136 if (ret) 5137 IL_ERR("C_CT_KILL_CONFIG failed\n"); 5138 else 5139 D_INFO("C_CT_KILL_CONFIG " "succeeded, " 5140 "critical temperature is %d\n", 5141 il->hw_params.ct_kill_threshold); 5142 } 5143 5144 static const s8 default_queue_to_tx_fifo[] = { 5145 IL_TX_FIFO_VO, 5146 IL_TX_FIFO_VI, 5147 IL_TX_FIFO_BE, 5148 IL_TX_FIFO_BK, 5149 IL49_CMD_FIFO_NUM, 5150 IL_TX_FIFO_UNUSED, 5151 IL_TX_FIFO_UNUSED, 5152 }; 5153 5154 #define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) 5155 5156 static int 5157 il4965_alive_notify(struct il_priv *il) 5158 { 5159 u32 a; 5160 unsigned long flags; 5161 int i, chan; 5162 u32 reg_val; 5163 5164 spin_lock_irqsave(&il->lock, flags); 5165 5166 /* Clear 4965's internal Tx Scheduler data base */ 5167 il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR); 5168 a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET; 5169 for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4) 5170 il_write_targ_mem(il, a, 0); 5171 for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4) 5172 il_write_targ_mem(il, a, 0); 5173 for (; 5174 a < 5175 il->scd_base_addr + 5176 IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num); 5177 a += 4) 5178 il_write_targ_mem(il, a, 0); 5179 5180 /* Tel 4965 where to find Tx byte count tables */ 5181 il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10); 5182 5183 /* Enable DMA channel */ 5184 for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++) 5185 il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan), 5186 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | 5187 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); 5188 5189 /* Update FH chicken bits */ 5190 reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG); 5191 il_wr(il, FH49_TX_CHICKEN_BITS_REG, 5192 reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); 5193 5194 /* Disable chain mode for all queues */ 5195 il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0); 5196 5197 /* Initialize each Tx queue (including the command queue) */ 5198 for (i = 0; i < il->hw_params.max_txq_num; i++) { 5199 5200 /* TFD circular buffer read/write idxes */ 5201 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0); 5202 il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8)); 5203 5204 /* Max Tx Window size for Scheduler-ACK mode */ 5205 il_write_targ_mem(il, 5206 il->scd_base_addr + 5207 IL49_SCD_CONTEXT_QUEUE_OFFSET(i), 5208 (SCD_WIN_SIZE << 5209 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & 5210 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); 5211 5212 /* Frame limit */ 5213 il_write_targ_mem(il, 5214 il->scd_base_addr + 5215 IL49_SCD_CONTEXT_QUEUE_OFFSET(i) + 5216 sizeof(u32), 5217 (SCD_FRAME_LIMIT << 5218 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & 5219 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); 5220 5221 } 5222 il_wr_prph(il, IL49_SCD_INTERRUPT_MASK, 5223 (1 << il->hw_params.max_txq_num) - 1); 5224 5225 /* Activate all Tx DMA/FIFO channels */ 5226 il4965_txq_set_sched(il, IL_MASK(0, 6)); 5227 5228 il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0); 5229 5230 /* make sure all queue are not stopped */ 5231 memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped)); 5232 for (i = 0; i < 4; i++) 5233 atomic_set(&il->queue_stop_count[i], 0); 5234 5235 /* reset to 0 to enable all the queue first */ 5236 il->txq_ctx_active_msk = 0; 5237 /* Map each Tx/cmd queue to its corresponding fifo */ 5238 BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7); 5239 5240 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) { 5241 int ac = default_queue_to_tx_fifo[i]; 5242 5243 il_txq_ctx_activate(il, i); 5244 5245 if (ac == IL_TX_FIFO_UNUSED) 5246 continue; 5247 5248 il4965_tx_queue_set_status(il, &il->txq[i], ac, 0); 5249 } 5250 5251 spin_unlock_irqrestore(&il->lock, flags); 5252 5253 return 0; 5254 } 5255 5256 /* 5257 * il4965_alive_start - called after N_ALIVE notification received 5258 * from protocol/runtime uCode (initialization uCode's 5259 * Alive gets handled by il_init_alive_start()). 5260 */ 5261 static void 5262 il4965_alive_start(struct il_priv *il) 5263 { 5264 int ret = 0; 5265 5266 D_INFO("Runtime Alive received.\n"); 5267 5268 if (il->card_alive.is_valid != UCODE_VALID_OK) { 5269 /* We had an error bringing up the hardware, so take it 5270 * all the way back down so we can try again */ 5271 D_INFO("Alive failed.\n"); 5272 goto restart; 5273 } 5274 5275 /* Initialize uCode has loaded Runtime uCode ... verify inst image. 5276 * This is a paranoid check, because we would not have gotten the 5277 * "runtime" alive if code weren't properly loaded. */ 5278 if (il4965_verify_ucode(il)) { 5279 /* Runtime instruction load was bad; 5280 * take it all the way back down so we can try again */ 5281 D_INFO("Bad runtime uCode load.\n"); 5282 goto restart; 5283 } 5284 5285 ret = il4965_alive_notify(il); 5286 if (ret) { 5287 IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret); 5288 goto restart; 5289 } 5290 5291 /* After the ALIVE response, we can send host commands to the uCode */ 5292 set_bit(S_ALIVE, &il->status); 5293 5294 /* Enable watchdog to monitor the driver tx queues */ 5295 il_setup_watchdog(il); 5296 5297 if (il_is_rfkill(il)) 5298 return; 5299 5300 ieee80211_wake_queues(il->hw); 5301 5302 il->active_rate = RATES_MASK; 5303 5304 il_power_update_mode(il, true); 5305 D_INFO("Updated power mode\n"); 5306 5307 if (il_is_associated(il)) { 5308 struct il_rxon_cmd *active_rxon = 5309 (struct il_rxon_cmd *)&il->active; 5310 /* apply any changes in staging */ 5311 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; 5312 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; 5313 } else { 5314 /* Initialize our rx_config data */ 5315 il_connection_init_rx_config(il); 5316 5317 if (il->ops->set_rxon_chain) 5318 il->ops->set_rxon_chain(il); 5319 } 5320 5321 /* Configure bluetooth coexistence if enabled */ 5322 il_send_bt_config(il); 5323 5324 il4965_reset_run_time_calib(il); 5325 5326 set_bit(S_READY, &il->status); 5327 5328 /* Configure the adapter for unassociated operation */ 5329 il_commit_rxon(il); 5330 5331 /* At this point, the NIC is initialized and operational */ 5332 il4965_rf_kill_ct_config(il); 5333 5334 D_INFO("ALIVE processing complete.\n"); 5335 wake_up(&il->wait_command_queue); 5336 5337 return; 5338 5339 restart: 5340 queue_work(il->workqueue, &il->restart); 5341 } 5342 5343 static void il4965_cancel_deferred_work(struct il_priv *il); 5344 5345 static void 5346 __il4965_down(struct il_priv *il) 5347 { 5348 unsigned long flags; 5349 int exit_pending; 5350 5351 D_INFO(DRV_NAME " is going down\n"); 5352 5353 il_scan_cancel_timeout(il, 200); 5354 5355 exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status); 5356 5357 /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set 5358 * to prevent rearm timer */ 5359 del_timer_sync(&il->watchdog); 5360 5361 il_clear_ucode_stations(il); 5362 5363 /* FIXME: race conditions ? */ 5364 spin_lock_irq(&il->sta_lock); 5365 /* 5366 * Remove all key information that is not stored as part 5367 * of station information since mac80211 may not have had 5368 * a chance to remove all the keys. When device is 5369 * reconfigured by mac80211 after an error all keys will 5370 * be reconfigured. 5371 */ 5372 memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys)); 5373 il->_4965.key_mapping_keys = 0; 5374 spin_unlock_irq(&il->sta_lock); 5375 5376 il_dealloc_bcast_stations(il); 5377 il_clear_driver_stations(il); 5378 5379 /* Unblock any waiting calls */ 5380 wake_up_all(&il->wait_command_queue); 5381 5382 /* Wipe out the EXIT_PENDING status bit if we are not actually 5383 * exiting the module */ 5384 if (!exit_pending) 5385 clear_bit(S_EXIT_PENDING, &il->status); 5386 5387 /* stop and reset the on-board processor */ 5388 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); 5389 5390 /* tell the device to stop sending interrupts */ 5391 spin_lock_irqsave(&il->lock, flags); 5392 il_disable_interrupts(il); 5393 spin_unlock_irqrestore(&il->lock, flags); 5394 il4965_synchronize_irq(il); 5395 5396 if (il->mac80211_registered) 5397 ieee80211_stop_queues(il->hw); 5398 5399 /* If we have not previously called il_init() then 5400 * clear all bits but the RF Kill bit and return */ 5401 if (!il_is_init(il)) { 5402 il->status = 5403 test_bit(S_RFKILL, &il->status) << S_RFKILL | 5404 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | 5405 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; 5406 goto exit; 5407 } 5408 5409 /* ...otherwise clear out all the status bits but the RF Kill 5410 * bit and continue taking the NIC down. */ 5411 il->status &= 5412 test_bit(S_RFKILL, &il->status) << S_RFKILL | 5413 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | 5414 test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR | 5415 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; 5416 5417 /* 5418 * We disabled and synchronized interrupt, and priv->mutex is taken, so 5419 * here is the only thread which will program device registers, but 5420 * still have lockdep assertions, so we are taking reg_lock. 5421 */ 5422 spin_lock_irq(&il->reg_lock); 5423 /* FIXME: il_grab_nic_access if rfkill is off ? */ 5424 5425 il4965_txq_ctx_stop(il); 5426 il4965_rxq_stop(il); 5427 /* Power-down device's busmaster DMA clocks */ 5428 _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); 5429 udelay(5); 5430 /* Make sure (redundant) we've released our request to stay awake */ 5431 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 5432 /* Stop the device, and put it in low power state */ 5433 _il_apm_stop(il); 5434 5435 spin_unlock_irq(&il->reg_lock); 5436 5437 il4965_txq_ctx_unmap(il); 5438 exit: 5439 memset(&il->card_alive, 0, sizeof(struct il_alive_resp)); 5440 5441 dev_kfree_skb(il->beacon_skb); 5442 il->beacon_skb = NULL; 5443 5444 /* clear out any free frames */ 5445 il4965_clear_free_frames(il); 5446 } 5447 5448 static void 5449 il4965_down(struct il_priv *il) 5450 { 5451 mutex_lock(&il->mutex); 5452 __il4965_down(il); 5453 mutex_unlock(&il->mutex); 5454 5455 il4965_cancel_deferred_work(il); 5456 } 5457 5458 5459 static void 5460 il4965_set_hw_ready(struct il_priv *il) 5461 { 5462 int ret; 5463 5464 il_set_bit(il, CSR_HW_IF_CONFIG_REG, 5465 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); 5466 5467 /* See if we got it */ 5468 ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, 5469 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 5470 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 5471 100); 5472 if (ret >= 0) 5473 il->hw_ready = true; 5474 5475 D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not"); 5476 } 5477 5478 static void 5479 il4965_prepare_card_hw(struct il_priv *il) 5480 { 5481 int ret; 5482 5483 il->hw_ready = false; 5484 5485 il4965_set_hw_ready(il); 5486 if (il->hw_ready) 5487 return; 5488 5489 /* If HW is not ready, prepare the conditions to check again */ 5490 il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE); 5491 5492 ret = 5493 _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, 5494 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 5495 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000); 5496 5497 /* HW should be ready by now, check again. */ 5498 if (ret != -ETIMEDOUT) 5499 il4965_set_hw_ready(il); 5500 } 5501 5502 #define MAX_HW_RESTARTS 5 5503 5504 static int 5505 __il4965_up(struct il_priv *il) 5506 { 5507 int i; 5508 int ret; 5509 5510 if (test_bit(S_EXIT_PENDING, &il->status)) { 5511 IL_WARN("Exit pending; will not bring the NIC up\n"); 5512 return -EIO; 5513 } 5514 5515 if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) { 5516 IL_ERR("ucode not available for device bringup\n"); 5517 return -EIO; 5518 } 5519 5520 ret = il4965_alloc_bcast_station(il); 5521 if (ret) { 5522 il_dealloc_bcast_stations(il); 5523 return ret; 5524 } 5525 5526 il4965_prepare_card_hw(il); 5527 if (!il->hw_ready) { 5528 il_dealloc_bcast_stations(il); 5529 IL_ERR("HW not ready\n"); 5530 return -EIO; 5531 } 5532 5533 /* If platform's RF_KILL switch is NOT set to KILL */ 5534 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) 5535 clear_bit(S_RFKILL, &il->status); 5536 else { 5537 set_bit(S_RFKILL, &il->status); 5538 wiphy_rfkill_set_hw_state(il->hw->wiphy, true); 5539 5540 il_dealloc_bcast_stations(il); 5541 il_enable_rfkill_int(il); 5542 IL_WARN("Radio disabled by HW RF Kill switch\n"); 5543 return 0; 5544 } 5545 5546 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5547 5548 /* must be initialised before il_hw_nic_init */ 5549 il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM; 5550 5551 ret = il4965_hw_nic_init(il); 5552 if (ret) { 5553 IL_ERR("Unable to init nic\n"); 5554 il_dealloc_bcast_stations(il); 5555 return ret; 5556 } 5557 5558 /* make sure rfkill handshake bits are cleared */ 5559 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5560 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 5561 5562 /* clear (again), then enable host interrupts */ 5563 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5564 il_enable_interrupts(il); 5565 5566 /* really make sure rfkill handshake bits are cleared */ 5567 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5568 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5569 5570 /* Copy original ucode data image from disk into backup cache. 5571 * This will be used to initialize the on-board processor's 5572 * data SRAM for a clean start when the runtime program first loads. */ 5573 memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr, 5574 il->ucode_data.len); 5575 5576 for (i = 0; i < MAX_HW_RESTARTS; i++) { 5577 5578 /* load bootstrap state machine, 5579 * load bootstrap program into processor's memory, 5580 * prepare to load the "initialize" uCode */ 5581 ret = il->ops->load_ucode(il); 5582 5583 if (ret) { 5584 IL_ERR("Unable to set up bootstrap uCode: %d\n", ret); 5585 continue; 5586 } 5587 5588 /* start card; "initialize" will load runtime ucode */ 5589 il4965_nic_start(il); 5590 5591 D_INFO(DRV_NAME " is coming up\n"); 5592 5593 return 0; 5594 } 5595 5596 set_bit(S_EXIT_PENDING, &il->status); 5597 __il4965_down(il); 5598 clear_bit(S_EXIT_PENDING, &il->status); 5599 5600 /* tried to restart and config the device for as long as our 5601 * patience could withstand */ 5602 IL_ERR("Unable to initialize device after %d attempts.\n", i); 5603 return -EIO; 5604 } 5605 5606 /***************************************************************************** 5607 * 5608 * Workqueue callbacks 5609 * 5610 *****************************************************************************/ 5611 5612 static void 5613 il4965_bg_init_alive_start(struct work_struct *data) 5614 { 5615 struct il_priv *il = 5616 container_of(data, struct il_priv, init_alive_start.work); 5617 5618 mutex_lock(&il->mutex); 5619 if (test_bit(S_EXIT_PENDING, &il->status)) 5620 goto out; 5621 5622 il->ops->init_alive_start(il); 5623 out: 5624 mutex_unlock(&il->mutex); 5625 } 5626 5627 static void 5628 il4965_bg_alive_start(struct work_struct *data) 5629 { 5630 struct il_priv *il = 5631 container_of(data, struct il_priv, alive_start.work); 5632 5633 mutex_lock(&il->mutex); 5634 if (test_bit(S_EXIT_PENDING, &il->status)) 5635 goto out; 5636 5637 il4965_alive_start(il); 5638 out: 5639 mutex_unlock(&il->mutex); 5640 } 5641 5642 static void 5643 il4965_bg_run_time_calib_work(struct work_struct *work) 5644 { 5645 struct il_priv *il = container_of(work, struct il_priv, 5646 run_time_calib_work); 5647 5648 mutex_lock(&il->mutex); 5649 5650 if (test_bit(S_EXIT_PENDING, &il->status) || 5651 test_bit(S_SCANNING, &il->status)) { 5652 mutex_unlock(&il->mutex); 5653 return; 5654 } 5655 5656 if (il->start_calib) { 5657 il4965_chain_noise_calibration(il, (void *)&il->_4965.stats); 5658 il4965_sensitivity_calibration(il, (void *)&il->_4965.stats); 5659 } 5660 5661 mutex_unlock(&il->mutex); 5662 } 5663 5664 static void 5665 il4965_bg_restart(struct work_struct *data) 5666 { 5667 struct il_priv *il = container_of(data, struct il_priv, restart); 5668 5669 if (test_bit(S_EXIT_PENDING, &il->status)) 5670 return; 5671 5672 if (test_and_clear_bit(S_FW_ERROR, &il->status)) { 5673 mutex_lock(&il->mutex); 5674 il->is_open = 0; 5675 5676 __il4965_down(il); 5677 5678 mutex_unlock(&il->mutex); 5679 il4965_cancel_deferred_work(il); 5680 ieee80211_restart_hw(il->hw); 5681 } else { 5682 il4965_down(il); 5683 5684 mutex_lock(&il->mutex); 5685 if (test_bit(S_EXIT_PENDING, &il->status)) { 5686 mutex_unlock(&il->mutex); 5687 return; 5688 } 5689 5690 __il4965_up(il); 5691 mutex_unlock(&il->mutex); 5692 } 5693 } 5694 5695 static void 5696 il4965_bg_rx_replenish(struct work_struct *data) 5697 { 5698 struct il_priv *il = container_of(data, struct il_priv, rx_replenish); 5699 5700 if (test_bit(S_EXIT_PENDING, &il->status)) 5701 return; 5702 5703 mutex_lock(&il->mutex); 5704 il4965_rx_replenish(il); 5705 mutex_unlock(&il->mutex); 5706 } 5707 5708 /***************************************************************************** 5709 * 5710 * mac80211 entry point functions 5711 * 5712 *****************************************************************************/ 5713 5714 #define UCODE_READY_TIMEOUT (4 * HZ) 5715 5716 /* 5717 * Not a mac80211 entry point function, but it fits in with all the 5718 * other mac80211 functions grouped here. 5719 */ 5720 static int 5721 il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length) 5722 { 5723 int ret; 5724 struct ieee80211_hw *hw = il->hw; 5725 5726 hw->rate_control_algorithm = "iwl-4965-rs"; 5727 5728 /* Tell mac80211 our characteristics */ 5729 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 5730 ieee80211_hw_set(hw, SUPPORTS_PS); 5731 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 5732 ieee80211_hw_set(hw, SPECTRUM_MGMT); 5733 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 5734 ieee80211_hw_set(hw, SIGNAL_DBM); 5735 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 5736 if (il->cfg->sku & IL_SKU_N) 5737 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 5738 NL80211_FEATURE_STATIC_SMPS; 5739 5740 hw->sta_data_size = sizeof(struct il_station_priv); 5741 hw->vif_data_size = sizeof(struct il_vif_priv); 5742 5743 hw->wiphy->interface_modes = 5744 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); 5745 5746 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 5747 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 5748 REGULATORY_DISABLE_BEACON_HINTS; 5749 5750 /* 5751 * For now, disable PS by default because it affects 5752 * RX performance significantly. 5753 */ 5754 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 5755 5756 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 5757 /* we create the 802.11 header and a zero-length SSID element */ 5758 hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2; 5759 5760 /* Default value; 4 EDCA QOS priorities */ 5761 hw->queues = 4; 5762 5763 hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL; 5764 5765 if (il->bands[NL80211_BAND_2GHZ].n_channels) 5766 il->hw->wiphy->bands[NL80211_BAND_2GHZ] = 5767 &il->bands[NL80211_BAND_2GHZ]; 5768 if (il->bands[NL80211_BAND_5GHZ].n_channels) 5769 il->hw->wiphy->bands[NL80211_BAND_5GHZ] = 5770 &il->bands[NL80211_BAND_5GHZ]; 5771 5772 il_leds_init(il); 5773 5774 wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 5775 5776 ret = ieee80211_register_hw(il->hw); 5777 if (ret) { 5778 IL_ERR("Failed to register hw (error %d)\n", ret); 5779 return ret; 5780 } 5781 il->mac80211_registered = 1; 5782 5783 return 0; 5784 } 5785 5786 int 5787 il4965_mac_start(struct ieee80211_hw *hw) 5788 { 5789 struct il_priv *il = hw->priv; 5790 int ret; 5791 5792 D_MAC80211("enter\n"); 5793 5794 /* we should be verifying the device is ready to be opened */ 5795 mutex_lock(&il->mutex); 5796 ret = __il4965_up(il); 5797 mutex_unlock(&il->mutex); 5798 5799 if (ret) 5800 return ret; 5801 5802 if (il_is_rfkill(il)) 5803 goto out; 5804 5805 D_INFO("Start UP work done.\n"); 5806 5807 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from 5808 * mac80211 will not be run successfully. */ 5809 ret = wait_event_timeout(il->wait_command_queue, 5810 test_bit(S_READY, &il->status), 5811 UCODE_READY_TIMEOUT); 5812 if (!ret) { 5813 if (!test_bit(S_READY, &il->status)) { 5814 IL_ERR("START_ALIVE timeout after %dms.\n", 5815 jiffies_to_msecs(UCODE_READY_TIMEOUT)); 5816 return -ETIMEDOUT; 5817 } 5818 } 5819 5820 il4965_led_enable(il); 5821 5822 out: 5823 il->is_open = 1; 5824 D_MAC80211("leave\n"); 5825 return 0; 5826 } 5827 5828 void 5829 il4965_mac_stop(struct ieee80211_hw *hw) 5830 { 5831 struct il_priv *il = hw->priv; 5832 5833 D_MAC80211("enter\n"); 5834 5835 if (!il->is_open) 5836 return; 5837 5838 il->is_open = 0; 5839 5840 il4965_down(il); 5841 5842 flush_workqueue(il->workqueue); 5843 5844 /* User space software may expect getting rfkill changes 5845 * even if interface is down */ 5846 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5847 il_enable_rfkill_int(il); 5848 5849 D_MAC80211("leave\n"); 5850 } 5851 5852 void 5853 il4965_mac_tx(struct ieee80211_hw *hw, 5854 struct ieee80211_tx_control *control, 5855 struct sk_buff *skb) 5856 { 5857 struct il_priv *il = hw->priv; 5858 5859 D_MACDUMP("enter\n"); 5860 5861 D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, 5862 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); 5863 5864 if (il4965_tx_skb(il, control->sta, skb)) 5865 dev_kfree_skb_any(skb); 5866 5867 D_MACDUMP("leave\n"); 5868 } 5869 5870 void 5871 il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 5872 struct ieee80211_key_conf *keyconf, 5873 struct ieee80211_sta *sta, u32 iv32, u16 * phase1key) 5874 { 5875 struct il_priv *il = hw->priv; 5876 5877 D_MAC80211("enter\n"); 5878 5879 il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key); 5880 5881 D_MAC80211("leave\n"); 5882 } 5883 5884 int 5885 il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 5886 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 5887 struct ieee80211_key_conf *key) 5888 { 5889 struct il_priv *il = hw->priv; 5890 int ret; 5891 u8 sta_id; 5892 bool is_default_wep_key = false; 5893 5894 D_MAC80211("enter\n"); 5895 5896 if (il->cfg->mod_params->sw_crypto) { 5897 D_MAC80211("leave - hwcrypto disabled\n"); 5898 return -EOPNOTSUPP; 5899 } 5900 5901 /* 5902 * To support IBSS RSN, don't program group keys in IBSS, the 5903 * hardware will then not attempt to decrypt the frames. 5904 */ 5905 if (vif->type == NL80211_IFTYPE_ADHOC && 5906 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 5907 D_MAC80211("leave - ad-hoc group key\n"); 5908 return -EOPNOTSUPP; 5909 } 5910 5911 sta_id = il_sta_id_or_broadcast(il, sta); 5912 if (sta_id == IL_INVALID_STATION) 5913 return -EINVAL; 5914 5915 mutex_lock(&il->mutex); 5916 il_scan_cancel_timeout(il, 100); 5917 5918 /* 5919 * If we are getting WEP group key and we didn't receive any key mapping 5920 * so far, we are in legacy wep mode (group key only), otherwise we are 5921 * in 1X mode. 5922 * In legacy wep mode, we use another host command to the uCode. 5923 */ 5924 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 5925 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 5926 if (cmd == SET_KEY) 5927 is_default_wep_key = !il->_4965.key_mapping_keys; 5928 else 5929 is_default_wep_key = 5930 (key->hw_key_idx == HW_KEY_DEFAULT); 5931 } 5932 5933 switch (cmd) { 5934 case SET_KEY: 5935 if (is_default_wep_key) 5936 ret = il4965_set_default_wep_key(il, key); 5937 else 5938 ret = il4965_set_dynamic_key(il, key, sta_id); 5939 5940 D_MAC80211("enable hwcrypto key\n"); 5941 break; 5942 case DISABLE_KEY: 5943 if (is_default_wep_key) 5944 ret = il4965_remove_default_wep_key(il, key); 5945 else 5946 ret = il4965_remove_dynamic_key(il, key, sta_id); 5947 5948 D_MAC80211("disable hwcrypto key\n"); 5949 break; 5950 default: 5951 ret = -EINVAL; 5952 } 5953 5954 mutex_unlock(&il->mutex); 5955 D_MAC80211("leave\n"); 5956 5957 return ret; 5958 } 5959 5960 int 5961 il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 5962 struct ieee80211_ampdu_params *params) 5963 { 5964 struct il_priv *il = hw->priv; 5965 int ret = -EINVAL; 5966 struct ieee80211_sta *sta = params->sta; 5967 enum ieee80211_ampdu_mlme_action action = params->action; 5968 u16 tid = params->tid; 5969 u16 *ssn = ¶ms->ssn; 5970 5971 D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid); 5972 5973 if (!(il->cfg->sku & IL_SKU_N)) 5974 return -EACCES; 5975 5976 mutex_lock(&il->mutex); 5977 5978 switch (action) { 5979 case IEEE80211_AMPDU_RX_START: 5980 D_HT("start Rx\n"); 5981 ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn); 5982 break; 5983 case IEEE80211_AMPDU_RX_STOP: 5984 D_HT("stop Rx\n"); 5985 ret = il4965_sta_rx_agg_stop(il, sta, tid); 5986 if (test_bit(S_EXIT_PENDING, &il->status)) 5987 ret = 0; 5988 break; 5989 case IEEE80211_AMPDU_TX_START: 5990 D_HT("start Tx\n"); 5991 ret = il4965_tx_agg_start(il, vif, sta, tid, ssn); 5992 break; 5993 case IEEE80211_AMPDU_TX_STOP_CONT: 5994 case IEEE80211_AMPDU_TX_STOP_FLUSH: 5995 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 5996 D_HT("stop Tx\n"); 5997 ret = il4965_tx_agg_stop(il, vif, sta, tid); 5998 if (test_bit(S_EXIT_PENDING, &il->status)) 5999 ret = 0; 6000 break; 6001 case IEEE80211_AMPDU_TX_OPERATIONAL: 6002 ret = 0; 6003 break; 6004 } 6005 mutex_unlock(&il->mutex); 6006 6007 return ret; 6008 } 6009 6010 int 6011 il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 6012 struct ieee80211_sta *sta) 6013 { 6014 struct il_priv *il = hw->priv; 6015 struct il_station_priv *sta_priv = (void *)sta->drv_priv; 6016 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 6017 int ret; 6018 u8 sta_id; 6019 6020 D_INFO("received request to add station %pM\n", sta->addr); 6021 mutex_lock(&il->mutex); 6022 D_INFO("proceeding to add station %pM\n", sta->addr); 6023 sta_priv->common.sta_id = IL_INVALID_STATION; 6024 6025 atomic_set(&sta_priv->pending_frames, 0); 6026 6027 ret = 6028 il_add_station_common(il, sta->addr, is_ap, sta, &sta_id); 6029 if (ret) { 6030 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret); 6031 /* Should we return success if return code is EEXIST ? */ 6032 mutex_unlock(&il->mutex); 6033 return ret; 6034 } 6035 6036 sta_priv->common.sta_id = sta_id; 6037 6038 /* Initialize rate scaling */ 6039 D_INFO("Initializing rate scaling for station %pM\n", sta->addr); 6040 il4965_rs_rate_init(il, sta, sta_id); 6041 mutex_unlock(&il->mutex); 6042 6043 return 0; 6044 } 6045 6046 void 6047 il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 6048 struct ieee80211_channel_switch *ch_switch) 6049 { 6050 struct il_priv *il = hw->priv; 6051 const struct il_channel_info *ch_info; 6052 struct ieee80211_conf *conf = &hw->conf; 6053 struct ieee80211_channel *channel = ch_switch->chandef.chan; 6054 struct il_ht_config *ht_conf = &il->current_ht_config; 6055 u16 ch; 6056 6057 D_MAC80211("enter\n"); 6058 6059 mutex_lock(&il->mutex); 6060 6061 if (il_is_rfkill(il)) 6062 goto out; 6063 6064 if (test_bit(S_EXIT_PENDING, &il->status) || 6065 test_bit(S_SCANNING, &il->status) || 6066 test_bit(S_CHANNEL_SWITCH_PENDING, &il->status)) 6067 goto out; 6068 6069 if (!il_is_associated(il)) 6070 goto out; 6071 6072 if (!il->ops->set_channel_switch) 6073 goto out; 6074 6075 ch = channel->hw_value; 6076 if (le16_to_cpu(il->active.channel) == ch) 6077 goto out; 6078 6079 ch_info = il_get_channel_info(il, channel->band, ch); 6080 if (!il_is_channel_valid(ch_info)) { 6081 D_MAC80211("invalid channel\n"); 6082 goto out; 6083 } 6084 6085 spin_lock_irq(&il->lock); 6086 6087 il->current_ht_config.smps = conf->smps_mode; 6088 6089 /* Configure HT40 channels */ 6090 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 6091 case NL80211_CHAN_NO_HT: 6092 case NL80211_CHAN_HT20: 6093 il->ht.is_40mhz = false; 6094 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 6095 break; 6096 case NL80211_CHAN_HT40MINUS: 6097 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 6098 il->ht.is_40mhz = true; 6099 break; 6100 case NL80211_CHAN_HT40PLUS: 6101 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 6102 il->ht.is_40mhz = true; 6103 break; 6104 } 6105 6106 if ((le16_to_cpu(il->staging.channel) != ch)) 6107 il->staging.flags = 0; 6108 6109 il_set_rxon_channel(il, channel); 6110 il_set_rxon_ht(il, ht_conf); 6111 il_set_flags_for_band(il, channel->band, il->vif); 6112 6113 spin_unlock_irq(&il->lock); 6114 6115 il_set_rate(il); 6116 /* 6117 * at this point, staging_rxon has the 6118 * configuration for channel switch 6119 */ 6120 set_bit(S_CHANNEL_SWITCH_PENDING, &il->status); 6121 il->switch_channel = cpu_to_le16(ch); 6122 if (il->ops->set_channel_switch(il, ch_switch)) { 6123 clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status); 6124 il->switch_channel = 0; 6125 ieee80211_chswitch_done(il->vif, false); 6126 } 6127 6128 out: 6129 mutex_unlock(&il->mutex); 6130 D_MAC80211("leave\n"); 6131 } 6132 6133 void 6134 il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, 6135 unsigned int *total_flags, u64 multicast) 6136 { 6137 struct il_priv *il = hw->priv; 6138 __le32 filter_or = 0, filter_nand = 0; 6139 6140 #define CHK(test, flag) do { \ 6141 if (*total_flags & (test)) \ 6142 filter_or |= (flag); \ 6143 else \ 6144 filter_nand |= (flag); \ 6145 } while (0) 6146 6147 D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags, 6148 *total_flags); 6149 6150 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 6151 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 6152 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 6153 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 6154 6155 #undef CHK 6156 6157 mutex_lock(&il->mutex); 6158 6159 il->staging.filter_flags &= ~filter_nand; 6160 il->staging.filter_flags |= filter_or; 6161 6162 /* 6163 * Not committing directly because hardware can perform a scan, 6164 * but we'll eventually commit the filter flags change anyway. 6165 */ 6166 6167 mutex_unlock(&il->mutex); 6168 6169 /* 6170 * Receiving all multicast frames is always enabled by the 6171 * default flags setup in il_connection_init_rx_config() 6172 * since we currently do not support programming multicast 6173 * filters into the device. 6174 */ 6175 *total_flags &= 6176 FIF_OTHER_BSS | FIF_ALLMULTI | 6177 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 6178 } 6179 6180 /***************************************************************************** 6181 * 6182 * driver setup and teardown 6183 * 6184 *****************************************************************************/ 6185 6186 static void 6187 il4965_bg_txpower_work(struct work_struct *work) 6188 { 6189 struct il_priv *il = container_of(work, struct il_priv, 6190 txpower_work); 6191 6192 mutex_lock(&il->mutex); 6193 6194 /* If a scan happened to start before we got here 6195 * then just return; the stats notification will 6196 * kick off another scheduled work to compensate for 6197 * any temperature delta we missed here. */ 6198 if (test_bit(S_EXIT_PENDING, &il->status) || 6199 test_bit(S_SCANNING, &il->status)) 6200 goto out; 6201 6202 /* Regardless of if we are associated, we must reconfigure the 6203 * TX power since frames can be sent on non-radar channels while 6204 * not associated */ 6205 il->ops->send_tx_power(il); 6206 6207 /* Update last_temperature to keep is_calib_needed from running 6208 * when it isn't needed... */ 6209 il->last_temperature = il->temperature; 6210 out: 6211 mutex_unlock(&il->mutex); 6212 } 6213 6214 static int 6215 il4965_setup_deferred_work(struct il_priv *il) 6216 { 6217 il->workqueue = create_singlethread_workqueue(DRV_NAME); 6218 if (!il->workqueue) 6219 return -ENOMEM; 6220 6221 init_waitqueue_head(&il->wait_command_queue); 6222 6223 INIT_WORK(&il->restart, il4965_bg_restart); 6224 INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish); 6225 INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work); 6226 INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start); 6227 INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start); 6228 6229 il_setup_scan_deferred_work(il); 6230 6231 INIT_WORK(&il->txpower_work, il4965_bg_txpower_work); 6232 6233 timer_setup(&il->stats_periodic, il4965_bg_stats_periodic, 0); 6234 6235 timer_setup(&il->watchdog, il_bg_watchdog, 0); 6236 6237 tasklet_setup(&il->irq_tasklet, il4965_irq_tasklet); 6238 6239 return 0; 6240 } 6241 6242 static void 6243 il4965_cancel_deferred_work(struct il_priv *il) 6244 { 6245 cancel_work_sync(&il->txpower_work); 6246 cancel_delayed_work_sync(&il->init_alive_start); 6247 cancel_delayed_work(&il->alive_start); 6248 cancel_work_sync(&il->run_time_calib_work); 6249 6250 il_cancel_scan_deferred_work(il); 6251 6252 del_timer_sync(&il->stats_periodic); 6253 } 6254 6255 static void 6256 il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates) 6257 { 6258 int i; 6259 6260 for (i = 0; i < RATE_COUNT_LEGACY; i++) { 6261 rates[i].bitrate = il_rates[i].ieee * 5; 6262 rates[i].hw_value = i; /* Rate scaling will work on idxes */ 6263 rates[i].hw_value_short = i; 6264 rates[i].flags = 0; 6265 if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) { 6266 /* 6267 * If CCK != 1M then set short preamble rate flag. 6268 */ 6269 rates[i].flags |= 6270 (il_rates[i].plcp == 6271 RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; 6272 } 6273 } 6274 } 6275 6276 /* 6277 * Acquire il->lock before calling this function ! 6278 */ 6279 void 6280 il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx) 6281 { 6282 il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8)); 6283 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx); 6284 } 6285 6286 void 6287 il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq, 6288 int tx_fifo_id, int scd_retry) 6289 { 6290 int txq_id = txq->q.id; 6291 6292 /* Find out whether to activate Tx queue */ 6293 int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0; 6294 6295 /* Set up and activate */ 6296 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), 6297 (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | 6298 (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) | 6299 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) | 6300 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) | 6301 IL49_SCD_QUEUE_STTS_REG_MSK); 6302 6303 txq->sched_retry = scd_retry; 6304 6305 D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate", 6306 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id); 6307 } 6308 6309 static const struct ieee80211_ops il4965_mac_ops = { 6310 .tx = il4965_mac_tx, 6311 .wake_tx_queue = ieee80211_handle_wake_tx_queue, 6312 .start = il4965_mac_start, 6313 .stop = il4965_mac_stop, 6314 .add_interface = il_mac_add_interface, 6315 .remove_interface = il_mac_remove_interface, 6316 .change_interface = il_mac_change_interface, 6317 .config = il_mac_config, 6318 .configure_filter = il4965_configure_filter, 6319 .set_key = il4965_mac_set_key, 6320 .update_tkip_key = il4965_mac_update_tkip_key, 6321 .conf_tx = il_mac_conf_tx, 6322 .reset_tsf = il_mac_reset_tsf, 6323 .bss_info_changed = il_mac_bss_info_changed, 6324 .ampdu_action = il4965_mac_ampdu_action, 6325 .hw_scan = il_mac_hw_scan, 6326 .sta_add = il4965_mac_sta_add, 6327 .sta_remove = il_mac_sta_remove, 6328 .channel_switch = il4965_mac_channel_switch, 6329 .tx_last_beacon = il_mac_tx_last_beacon, 6330 .flush = il_mac_flush, 6331 }; 6332 6333 static int 6334 il4965_init_drv(struct il_priv *il) 6335 { 6336 int ret; 6337 6338 spin_lock_init(&il->sta_lock); 6339 spin_lock_init(&il->hcmd_lock); 6340 6341 INIT_LIST_HEAD(&il->free_frames); 6342 6343 mutex_init(&il->mutex); 6344 6345 il->ieee_channels = NULL; 6346 il->ieee_rates = NULL; 6347 il->band = NL80211_BAND_2GHZ; 6348 6349 il->iw_mode = NL80211_IFTYPE_STATION; 6350 il->current_ht_config.smps = IEEE80211_SMPS_STATIC; 6351 il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF; 6352 6353 /* initialize force reset */ 6354 il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD; 6355 6356 /* Choose which receivers/antennas to use */ 6357 if (il->ops->set_rxon_chain) 6358 il->ops->set_rxon_chain(il); 6359 6360 il_init_scan_params(il); 6361 6362 ret = il_init_channel_map(il); 6363 if (ret) { 6364 IL_ERR("initializing regulatory failed: %d\n", ret); 6365 goto err; 6366 } 6367 6368 ret = il_init_geos(il); 6369 if (ret) { 6370 IL_ERR("initializing geos failed: %d\n", ret); 6371 goto err_free_channel_map; 6372 } 6373 il4965_init_hw_rates(il, il->ieee_rates); 6374 6375 return 0; 6376 6377 err_free_channel_map: 6378 il_free_channel_map(il); 6379 err: 6380 return ret; 6381 } 6382 6383 static void 6384 il4965_uninit_drv(struct il_priv *il) 6385 { 6386 il_free_geos(il); 6387 il_free_channel_map(il); 6388 kfree(il->scan_cmd); 6389 } 6390 6391 static void 6392 il4965_hw_detect(struct il_priv *il) 6393 { 6394 il->hw_rev = _il_rd(il, CSR_HW_REV); 6395 il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG); 6396 il->rev_id = il->pci_dev->revision; 6397 D_INFO("HW Revision ID = 0x%X\n", il->rev_id); 6398 } 6399 6400 static const struct il_sensitivity_ranges il4965_sensitivity = { 6401 .min_nrg_cck = 97, 6402 .max_nrg_cck = 0, /* not used, set to 0 */ 6403 6404 .auto_corr_min_ofdm = 85, 6405 .auto_corr_min_ofdm_mrc = 170, 6406 .auto_corr_min_ofdm_x1 = 105, 6407 .auto_corr_min_ofdm_mrc_x1 = 220, 6408 6409 .auto_corr_max_ofdm = 120, 6410 .auto_corr_max_ofdm_mrc = 210, 6411 .auto_corr_max_ofdm_x1 = 140, 6412 .auto_corr_max_ofdm_mrc_x1 = 270, 6413 6414 .auto_corr_min_cck = 125, 6415 .auto_corr_max_cck = 200, 6416 .auto_corr_min_cck_mrc = 200, 6417 .auto_corr_max_cck_mrc = 400, 6418 6419 .nrg_th_cck = 100, 6420 .nrg_th_ofdm = 100, 6421 6422 .barker_corr_th_min = 190, 6423 .barker_corr_th_min_mrc = 390, 6424 .nrg_th_cca = 62, 6425 }; 6426 6427 static void 6428 il4965_set_hw_params(struct il_priv *il) 6429 { 6430 il->hw_params.bcast_id = IL4965_BROADCAST_ID; 6431 il->hw_params.max_rxq_size = RX_QUEUE_SIZE; 6432 il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG; 6433 if (il->cfg->mod_params->amsdu_size_8K) 6434 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K); 6435 else 6436 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K); 6437 6438 il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL; 6439 6440 if (il->cfg->mod_params->disable_11n) 6441 il->cfg->sku &= ~IL_SKU_N; 6442 6443 if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES && 6444 il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES) 6445 il->cfg->num_of_queues = 6446 il->cfg->mod_params->num_of_queues; 6447 6448 il->hw_params.max_txq_num = il->cfg->num_of_queues; 6449 il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM; 6450 il->hw_params.scd_bc_tbls_size = 6451 il->cfg->num_of_queues * 6452 sizeof(struct il4965_scd_bc_tbl); 6453 6454 il->hw_params.tfd_size = sizeof(struct il_tfd); 6455 il->hw_params.max_stations = IL4965_STATION_COUNT; 6456 il->hw_params.max_data_size = IL49_RTC_DATA_SIZE; 6457 il->hw_params.max_inst_size = IL49_RTC_INST_SIZE; 6458 il->hw_params.max_bsm_size = BSM_SRAM_SIZE; 6459 il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ); 6460 6461 il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR; 6462 6463 il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant); 6464 il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant); 6465 il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant; 6466 il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant; 6467 6468 il->hw_params.ct_kill_threshold = 6469 celsius_to_kelvin(CT_KILL_THRESHOLD_LEGACY); 6470 6471 il->hw_params.sens = &il4965_sensitivity; 6472 il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS; 6473 } 6474 6475 static int 6476 il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 6477 { 6478 int err = 0; 6479 struct il_priv *il; 6480 struct ieee80211_hw *hw; 6481 struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data); 6482 unsigned long flags; 6483 u16 pci_cmd; 6484 6485 /************************ 6486 * 1. Allocating HW data 6487 ************************/ 6488 6489 hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops); 6490 if (!hw) { 6491 err = -ENOMEM; 6492 goto out; 6493 } 6494 il = hw->priv; 6495 il->hw = hw; 6496 SET_IEEE80211_DEV(hw, &pdev->dev); 6497 6498 D_INFO("*** LOAD DRIVER ***\n"); 6499 il->cfg = cfg; 6500 il->ops = &il4965_ops; 6501 #ifdef CONFIG_IWLEGACY_DEBUGFS 6502 il->debugfs_ops = &il4965_debugfs_ops; 6503 #endif 6504 il->pci_dev = pdev; 6505 il->inta_mask = CSR_INI_SET_MASK; 6506 6507 /************************** 6508 * 2. Initializing PCI bus 6509 **************************/ 6510 pci_disable_link_state(pdev, 6511 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | 6512 PCIE_LINK_STATE_CLKPM); 6513 6514 if (pci_enable_device(pdev)) { 6515 err = -ENODEV; 6516 goto out_ieee80211_free_hw; 6517 } 6518 6519 pci_set_master(pdev); 6520 6521 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36)); 6522 if (err) { 6523 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 6524 /* both attempts failed: */ 6525 if (err) { 6526 IL_WARN("No suitable DMA available.\n"); 6527 goto out_pci_disable_device; 6528 } 6529 } 6530 6531 err = pci_request_regions(pdev, DRV_NAME); 6532 if (err) 6533 goto out_pci_disable_device; 6534 6535 pci_set_drvdata(pdev, il); 6536 6537 /*********************** 6538 * 3. Read REV register 6539 ***********************/ 6540 il->hw_base = pci_ioremap_bar(pdev, 0); 6541 if (!il->hw_base) { 6542 err = -ENODEV; 6543 goto out_pci_release_regions; 6544 } 6545 6546 D_INFO("pci_resource_len = 0x%08llx\n", 6547 (unsigned long long)pci_resource_len(pdev, 0)); 6548 D_INFO("pci_resource_base = %p\n", il->hw_base); 6549 6550 /* these spin locks will be used in apm_ops.init and EEPROM access 6551 * we should init now 6552 */ 6553 spin_lock_init(&il->reg_lock); 6554 spin_lock_init(&il->lock); 6555 6556 /* 6557 * stop and reset the on-board processor just in case it is in a 6558 * strange state ... like being left stranded by a primary kernel 6559 * and this is now the kdump kernel trying to start up 6560 */ 6561 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); 6562 6563 il4965_hw_detect(il); 6564 IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev); 6565 6566 /* We disable the RETRY_TIMEOUT register (0x41) to keep 6567 * PCI Tx retries from interfering with C3 CPU state */ 6568 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); 6569 6570 il4965_prepare_card_hw(il); 6571 if (!il->hw_ready) { 6572 IL_WARN("Failed, HW not ready\n"); 6573 err = -EIO; 6574 goto out_iounmap; 6575 } 6576 6577 /***************** 6578 * 4. Read EEPROM 6579 *****************/ 6580 /* Read the EEPROM */ 6581 err = il_eeprom_init(il); 6582 if (err) { 6583 IL_ERR("Unable to init EEPROM\n"); 6584 goto out_iounmap; 6585 } 6586 err = il4965_eeprom_check_version(il); 6587 if (err) 6588 goto out_free_eeprom; 6589 6590 /* extract MAC Address */ 6591 il4965_eeprom_get_mac(il, il->addresses[0].addr); 6592 D_INFO("MAC address: %pM\n", il->addresses[0].addr); 6593 il->hw->wiphy->addresses = il->addresses; 6594 il->hw->wiphy->n_addresses = 1; 6595 6596 /************************ 6597 * 5. Setup HW constants 6598 ************************/ 6599 il4965_set_hw_params(il); 6600 6601 /******************* 6602 * 6. Setup il 6603 *******************/ 6604 6605 err = il4965_init_drv(il); 6606 if (err) 6607 goto out_free_eeprom; 6608 /* At this point both hw and il are initialized. */ 6609 6610 /******************** 6611 * 7. Setup services 6612 ********************/ 6613 spin_lock_irqsave(&il->lock, flags); 6614 il_disable_interrupts(il); 6615 spin_unlock_irqrestore(&il->lock, flags); 6616 6617 pci_enable_msi(il->pci_dev); 6618 6619 err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il); 6620 if (err) { 6621 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq); 6622 goto out_disable_msi; 6623 } 6624 6625 err = il4965_setup_deferred_work(il); 6626 if (err) 6627 goto out_free_irq; 6628 6629 il4965_setup_handlers(il); 6630 6631 /********************************************* 6632 * 8. Enable interrupts and read RFKILL state 6633 *********************************************/ 6634 6635 /* enable rfkill interrupt: hw bug w/a */ 6636 pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd); 6637 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { 6638 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 6639 pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd); 6640 } 6641 6642 il_enable_rfkill_int(il); 6643 6644 /* If platform's RF_KILL switch is NOT set to KILL */ 6645 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) 6646 clear_bit(S_RFKILL, &il->status); 6647 else 6648 set_bit(S_RFKILL, &il->status); 6649 6650 wiphy_rfkill_set_hw_state(il->hw->wiphy, 6651 test_bit(S_RFKILL, &il->status)); 6652 6653 il_power_initialize(il); 6654 6655 init_completion(&il->_4965.firmware_loading_complete); 6656 6657 err = il4965_request_firmware(il, true); 6658 if (err) 6659 goto out_destroy_workqueue; 6660 6661 return 0; 6662 6663 out_destroy_workqueue: 6664 destroy_workqueue(il->workqueue); 6665 il->workqueue = NULL; 6666 out_free_irq: 6667 free_irq(il->pci_dev->irq, il); 6668 out_disable_msi: 6669 pci_disable_msi(il->pci_dev); 6670 il4965_uninit_drv(il); 6671 out_free_eeprom: 6672 il_eeprom_free(il); 6673 out_iounmap: 6674 iounmap(il->hw_base); 6675 out_pci_release_regions: 6676 pci_release_regions(pdev); 6677 out_pci_disable_device: 6678 pci_disable_device(pdev); 6679 out_ieee80211_free_hw: 6680 ieee80211_free_hw(il->hw); 6681 out: 6682 return err; 6683 } 6684 6685 static void 6686 il4965_pci_remove(struct pci_dev *pdev) 6687 { 6688 struct il_priv *il = pci_get_drvdata(pdev); 6689 unsigned long flags; 6690 6691 if (!il) 6692 return; 6693 6694 wait_for_completion(&il->_4965.firmware_loading_complete); 6695 6696 D_INFO("*** UNLOAD DRIVER ***\n"); 6697 6698 il_dbgfs_unregister(il); 6699 sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group); 6700 6701 /* ieee80211_unregister_hw call wil cause il_mac_stop to 6702 * be called and il4965_down since we are removing the device 6703 * we need to set S_EXIT_PENDING bit. 6704 */ 6705 set_bit(S_EXIT_PENDING, &il->status); 6706 6707 il_leds_exit(il); 6708 6709 if (il->mac80211_registered) { 6710 ieee80211_unregister_hw(il->hw); 6711 il->mac80211_registered = 0; 6712 } else { 6713 il4965_down(il); 6714 } 6715 6716 /* 6717 * Make sure device is reset to low power before unloading driver. 6718 * This may be redundant with il4965_down(), but there are paths to 6719 * run il4965_down() without calling apm_ops.stop(), and there are 6720 * paths to avoid running il4965_down() at all before leaving driver. 6721 * This (inexpensive) call *makes sure* device is reset. 6722 */ 6723 il_apm_stop(il); 6724 6725 /* make sure we flush any pending irq or 6726 * tasklet for the driver 6727 */ 6728 spin_lock_irqsave(&il->lock, flags); 6729 il_disable_interrupts(il); 6730 spin_unlock_irqrestore(&il->lock, flags); 6731 6732 il4965_synchronize_irq(il); 6733 6734 il4965_dealloc_ucode_pci(il); 6735 6736 if (il->rxq.bd) 6737 il4965_rx_queue_free(il, &il->rxq); 6738 il4965_hw_txq_ctx_free(il); 6739 6740 il_eeprom_free(il); 6741 6742 /*netif_stop_queue(dev); */ 6743 6744 /* ieee80211_unregister_hw calls il_mac_stop, which flushes 6745 * il->workqueue... so we can't take down the workqueue 6746 * until now... */ 6747 destroy_workqueue(il->workqueue); 6748 il->workqueue = NULL; 6749 6750 free_irq(il->pci_dev->irq, il); 6751 pci_disable_msi(il->pci_dev); 6752 iounmap(il->hw_base); 6753 pci_release_regions(pdev); 6754 pci_disable_device(pdev); 6755 6756 il4965_uninit_drv(il); 6757 6758 dev_kfree_skb(il->beacon_skb); 6759 6760 ieee80211_free_hw(il->hw); 6761 } 6762 6763 /* 6764 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask 6765 * must be called under il->lock and mac access 6766 */ 6767 void 6768 il4965_txq_set_sched(struct il_priv *il, u32 mask) 6769 { 6770 il_wr_prph(il, IL49_SCD_TXFACT, mask); 6771 } 6772 6773 /***************************************************************************** 6774 * 6775 * driver and module entry point 6776 * 6777 *****************************************************************************/ 6778 6779 /* Hardware specific file defines the PCI IDs table for that hardware module */ 6780 static const struct pci_device_id il4965_hw_card_ids[] = { 6781 {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)}, 6782 {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)}, 6783 {0} 6784 }; 6785 MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids); 6786 6787 static struct pci_driver il4965_driver = { 6788 .name = DRV_NAME, 6789 .id_table = il4965_hw_card_ids, 6790 .probe = il4965_pci_probe, 6791 .remove = il4965_pci_remove, 6792 .driver.pm = IL_LEGACY_PM_OPS, 6793 }; 6794 6795 static int __init 6796 il4965_init(void) 6797 { 6798 6799 int ret; 6800 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n"); 6801 pr_info(DRV_COPYRIGHT "\n"); 6802 6803 ret = il4965_rate_control_register(); 6804 if (ret) { 6805 pr_err("Unable to register rate control algorithm: %d\n", ret); 6806 return ret; 6807 } 6808 6809 ret = pci_register_driver(&il4965_driver); 6810 if (ret) { 6811 pr_err("Unable to initialize PCI module\n"); 6812 goto error_register; 6813 } 6814 6815 return ret; 6816 6817 error_register: 6818 il4965_rate_control_unregister(); 6819 return ret; 6820 } 6821 6822 static void __exit 6823 il4965_exit(void) 6824 { 6825 pci_unregister_driver(&il4965_driver); 6826 il4965_rate_control_unregister(); 6827 } 6828 6829 module_exit(il4965_exit); 6830 module_init(il4965_init); 6831 6832 #ifdef CONFIG_IWLEGACY_DEBUG 6833 module_param_named(debug, il_debug_level, uint, 0644); 6834 MODULE_PARM_DESC(debug, "debug output mask"); 6835 #endif 6836 6837 module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, 0444); 6838 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])"); 6839 module_param_named(queues_num, il4965_mod_params.num_of_queues, int, 0444); 6840 MODULE_PARM_DESC(queues_num, "number of hw queues."); 6841 module_param_named(11n_disable, il4965_mod_params.disable_11n, int, 0444); 6842 MODULE_PARM_DESC(11n_disable, "disable 11n functionality"); 6843 module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 0444); 6844 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])"); 6845 module_param_named(fw_restart, il4965_mod_params.restart_fw, int, 0444); 6846 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error"); 6847