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 31 #include <net/mac80211.h> 32 33 #include <asm/div64.h> 34 35 #define DRV_NAME "iwl4965" 36 37 #include "common.h" 38 #include "4965.h" 39 40 /****************************************************************************** 41 * 42 * module boiler plate 43 * 44 ******************************************************************************/ 45 46 /* 47 * module name, copyright, version, etc. 48 */ 49 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux" 50 51 #ifdef CONFIG_IWLEGACY_DEBUG 52 #define VD "d" 53 #else 54 #define VD 55 #endif 56 57 #define DRV_VERSION IWLWIFI_VERSION VD 58 59 MODULE_DESCRIPTION(DRV_DESCRIPTION); 60 MODULE_VERSION(DRV_VERSION); 61 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); 62 MODULE_LICENSE("GPL"); 63 MODULE_ALIAS("iwl4965"); 64 65 void 66 il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status) 67 { 68 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { 69 IL_ERR("Tx flush command to flush out all frames\n"); 70 if (!test_bit(S_EXIT_PENDING, &il->status)) 71 queue_work(il->workqueue, &il->tx_flush); 72 } 73 } 74 75 /* 76 * EEPROM 77 */ 78 struct il_mod_params il4965_mod_params = { 79 .restart_fw = 1, 80 /* the rest are 0 by default */ 81 }; 82 83 void 84 il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq) 85 { 86 unsigned long flags; 87 int i; 88 spin_lock_irqsave(&rxq->lock, flags); 89 INIT_LIST_HEAD(&rxq->rx_free); 90 INIT_LIST_HEAD(&rxq->rx_used); 91 /* Fill the rx_used queue with _all_ of the Rx buffers */ 92 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { 93 /* In the reset function, these buffers may have been allocated 94 * to an SKB, so we need to unmap and free potential storage */ 95 if (rxq->pool[i].page != NULL) { 96 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma, 97 PAGE_SIZE << il->hw_params.rx_page_order, 98 PCI_DMA_FROMDEVICE); 99 __il_free_pages(il, rxq->pool[i].page); 100 rxq->pool[i].page = NULL; 101 } 102 list_add_tail(&rxq->pool[i].list, &rxq->rx_used); 103 } 104 105 for (i = 0; i < RX_QUEUE_SIZE; i++) 106 rxq->queue[i] = NULL; 107 108 /* Set us so that we have processed and used all buffers, but have 109 * not restocked the Rx queue with fresh buffers */ 110 rxq->read = rxq->write = 0; 111 rxq->write_actual = 0; 112 rxq->free_count = 0; 113 spin_unlock_irqrestore(&rxq->lock, flags); 114 } 115 116 int 117 il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq) 118 { 119 u32 rb_size; 120 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ 121 u32 rb_timeout = 0; 122 123 if (il->cfg->mod_params->amsdu_size_8K) 124 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; 125 else 126 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; 127 128 /* Stop Rx DMA */ 129 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); 130 131 /* Reset driver's Rx queue write idx */ 132 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); 133 134 /* Tell device where to find RBD circular buffer in DRAM */ 135 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8)); 136 137 /* Tell device where in DRAM to update its Rx status */ 138 il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4); 139 140 /* Enable Rx DMA 141 * Direct rx interrupts to hosts 142 * Rx buffer size 4 or 8k 143 * RB timeout 0x10 144 * 256 RBDs 145 */ 146 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 147 FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | 148 FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | 149 FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | 150 rb_size | 151 (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) | 152 (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); 153 154 /* Set interrupt coalescing timer to default (2048 usecs) */ 155 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF); 156 157 return 0; 158 } 159 160 static void 161 il4965_set_pwr_vmain(struct il_priv *il) 162 { 163 /* 164 * (for documentation purposes) 165 * to set power to V_AUX, do: 166 167 if (pci_pme_capable(il->pci_dev, PCI_D3cold)) 168 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, 169 APMG_PS_CTRL_VAL_PWR_SRC_VAUX, 170 ~APMG_PS_CTRL_MSK_PWR_SRC); 171 */ 172 173 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, 174 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, 175 ~APMG_PS_CTRL_MSK_PWR_SRC); 176 } 177 178 int 179 il4965_hw_nic_init(struct il_priv *il) 180 { 181 unsigned long flags; 182 struct il_rx_queue *rxq = &il->rxq; 183 int ret; 184 185 spin_lock_irqsave(&il->lock, flags); 186 il_apm_init(il); 187 /* Set interrupt coalescing calibration timer to default (512 usecs) */ 188 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF); 189 spin_unlock_irqrestore(&il->lock, flags); 190 191 il4965_set_pwr_vmain(il); 192 il4965_nic_config(il); 193 194 /* Allocate the RX queue, or reset if it is already allocated */ 195 if (!rxq->bd) { 196 ret = il_rx_queue_alloc(il); 197 if (ret) { 198 IL_ERR("Unable to initialize Rx queue\n"); 199 return -ENOMEM; 200 } 201 } else 202 il4965_rx_queue_reset(il, rxq); 203 204 il4965_rx_replenish(il); 205 206 il4965_rx_init(il, rxq); 207 208 spin_lock_irqsave(&il->lock, flags); 209 210 rxq->need_update = 1; 211 il_rx_queue_update_write_ptr(il, rxq); 212 213 spin_unlock_irqrestore(&il->lock, flags); 214 215 /* Allocate or reset and init all Tx and Command queues */ 216 if (!il->txq) { 217 ret = il4965_txq_ctx_alloc(il); 218 if (ret) 219 return ret; 220 } else 221 il4965_txq_ctx_reset(il); 222 223 set_bit(S_INIT, &il->status); 224 225 return 0; 226 } 227 228 /** 229 * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr 230 */ 231 static inline __le32 232 il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr) 233 { 234 return cpu_to_le32((u32) (dma_addr >> 8)); 235 } 236 237 /** 238 * il4965_rx_queue_restock - refill RX queue from pre-allocated pool 239 * 240 * If there are slots in the RX queue that need to be restocked, 241 * and we have free pre-allocated buffers, fill the ranks as much 242 * as we can, pulling from rx_free. 243 * 244 * This moves the 'write' idx forward to catch up with 'processed', and 245 * also updates the memory address in the firmware to reference the new 246 * target buffer. 247 */ 248 void 249 il4965_rx_queue_restock(struct il_priv *il) 250 { 251 struct il_rx_queue *rxq = &il->rxq; 252 struct list_head *element; 253 struct il_rx_buf *rxb; 254 unsigned long flags; 255 256 spin_lock_irqsave(&rxq->lock, flags); 257 while (il_rx_queue_space(rxq) > 0 && rxq->free_count) { 258 /* The overwritten rxb must be a used one */ 259 rxb = rxq->queue[rxq->write]; 260 BUG_ON(rxb && rxb->page); 261 262 /* Get next free Rx buffer, remove from free list */ 263 element = rxq->rx_free.next; 264 rxb = list_entry(element, struct il_rx_buf, list); 265 list_del(element); 266 267 /* Point to Rx buffer via next RBD in circular buffer */ 268 rxq->bd[rxq->write] = 269 il4965_dma_addr2rbd_ptr(il, rxb->page_dma); 270 rxq->queue[rxq->write] = rxb; 271 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; 272 rxq->free_count--; 273 } 274 spin_unlock_irqrestore(&rxq->lock, flags); 275 /* If the pre-allocated buffer pool is dropping low, schedule to 276 * refill it */ 277 if (rxq->free_count <= RX_LOW_WATERMARK) 278 queue_work(il->workqueue, &il->rx_replenish); 279 280 /* If we've added more space for the firmware to place data, tell it. 281 * Increment device's write pointer in multiples of 8. */ 282 if (rxq->write_actual != (rxq->write & ~0x7)) { 283 spin_lock_irqsave(&rxq->lock, flags); 284 rxq->need_update = 1; 285 spin_unlock_irqrestore(&rxq->lock, flags); 286 il_rx_queue_update_write_ptr(il, rxq); 287 } 288 } 289 290 /** 291 * il4965_rx_replenish - Move all used packet from rx_used to rx_free 292 * 293 * When moving to rx_free an SKB is allocated for the slot. 294 * 295 * Also restock the Rx queue via il_rx_queue_restock. 296 * This is called as a scheduled work item (except for during initialization) 297 */ 298 static void 299 il4965_rx_allocate(struct il_priv *il, gfp_t priority) 300 { 301 struct il_rx_queue *rxq = &il->rxq; 302 struct list_head *element; 303 struct il_rx_buf *rxb; 304 struct page *page; 305 dma_addr_t page_dma; 306 unsigned long flags; 307 gfp_t gfp_mask = priority; 308 309 while (1) { 310 spin_lock_irqsave(&rxq->lock, flags); 311 if (list_empty(&rxq->rx_used)) { 312 spin_unlock_irqrestore(&rxq->lock, flags); 313 return; 314 } 315 spin_unlock_irqrestore(&rxq->lock, flags); 316 317 if (rxq->free_count > RX_LOW_WATERMARK) 318 gfp_mask |= __GFP_NOWARN; 319 320 if (il->hw_params.rx_page_order > 0) 321 gfp_mask |= __GFP_COMP; 322 323 /* Alloc a new receive buffer */ 324 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order); 325 if (!page) { 326 if (net_ratelimit()) 327 D_INFO("alloc_pages failed, " "order: %d\n", 328 il->hw_params.rx_page_order); 329 330 if (rxq->free_count <= RX_LOW_WATERMARK && 331 net_ratelimit()) 332 IL_ERR("Failed to alloc_pages with %s. " 333 "Only %u free buffers remaining.\n", 334 priority == 335 GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL", 336 rxq->free_count); 337 /* We don't reschedule replenish work here -- we will 338 * call the restock method and if it still needs 339 * more buffers it will schedule replenish */ 340 return; 341 } 342 343 /* Get physical address of the RB */ 344 page_dma = 345 pci_map_page(il->pci_dev, page, 0, 346 PAGE_SIZE << il->hw_params.rx_page_order, 347 PCI_DMA_FROMDEVICE); 348 if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) { 349 __free_pages(page, il->hw_params.rx_page_order); 350 break; 351 } 352 353 spin_lock_irqsave(&rxq->lock, flags); 354 355 if (list_empty(&rxq->rx_used)) { 356 spin_unlock_irqrestore(&rxq->lock, flags); 357 pci_unmap_page(il->pci_dev, page_dma, 358 PAGE_SIZE << il->hw_params.rx_page_order, 359 PCI_DMA_FROMDEVICE); 360 __free_pages(page, il->hw_params.rx_page_order); 361 return; 362 } 363 364 element = rxq->rx_used.next; 365 rxb = list_entry(element, struct il_rx_buf, list); 366 list_del(element); 367 368 BUG_ON(rxb->page); 369 370 rxb->page = page; 371 rxb->page_dma = page_dma; 372 list_add_tail(&rxb->list, &rxq->rx_free); 373 rxq->free_count++; 374 il->alloc_rxb_page++; 375 376 spin_unlock_irqrestore(&rxq->lock, flags); 377 } 378 } 379 380 void 381 il4965_rx_replenish(struct il_priv *il) 382 { 383 unsigned long flags; 384 385 il4965_rx_allocate(il, GFP_KERNEL); 386 387 spin_lock_irqsave(&il->lock, flags); 388 il4965_rx_queue_restock(il); 389 spin_unlock_irqrestore(&il->lock, flags); 390 } 391 392 void 393 il4965_rx_replenish_now(struct il_priv *il) 394 { 395 il4965_rx_allocate(il, GFP_ATOMIC); 396 397 il4965_rx_queue_restock(il); 398 } 399 400 /* Assumes that the skb field of the buffers in 'pool' is kept accurate. 401 * If an SKB has been detached, the POOL needs to have its SKB set to NULL 402 * This free routine walks the list of POOL entries and if SKB is set to 403 * non NULL it is unmapped and freed 404 */ 405 void 406 il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq) 407 { 408 int i; 409 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { 410 if (rxq->pool[i].page != NULL) { 411 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma, 412 PAGE_SIZE << il->hw_params.rx_page_order, 413 PCI_DMA_FROMDEVICE); 414 __il_free_pages(il, rxq->pool[i].page); 415 rxq->pool[i].page = NULL; 416 } 417 } 418 419 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, 420 rxq->bd_dma); 421 dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status), 422 rxq->rb_stts, rxq->rb_stts_dma); 423 rxq->bd = NULL; 424 rxq->rb_stts = NULL; 425 } 426 427 int 428 il4965_rxq_stop(struct il_priv *il) 429 { 430 int ret; 431 432 _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); 433 ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG, 434 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 435 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 436 1000); 437 if (ret < 0) 438 IL_ERR("Can't stop Rx DMA.\n"); 439 440 return 0; 441 } 442 443 int 444 il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band) 445 { 446 int idx = 0; 447 int band_offset = 0; 448 449 /* HT rate format: mac80211 wants an MCS number, which is just LSB */ 450 if (rate_n_flags & RATE_MCS_HT_MSK) { 451 idx = (rate_n_flags & 0xff); 452 return idx; 453 /* Legacy rate format, search for match in table */ 454 } else { 455 if (band == NL80211_BAND_5GHZ) 456 band_offset = IL_FIRST_OFDM_RATE; 457 for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++) 458 if (il_rates[idx].plcp == (rate_n_flags & 0xFF)) 459 return idx - band_offset; 460 } 461 462 return -1; 463 } 464 465 static int 466 il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp) 467 { 468 /* data from PHY/DSP regarding signal strength, etc., 469 * contents are always there, not configurable by host. */ 470 struct il4965_rx_non_cfg_phy *ncphy = 471 (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf; 472 u32 agc = 473 (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >> 474 IL49_AGC_DB_POS; 475 476 u32 valid_antennae = 477 (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK) 478 >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET; 479 u8 max_rssi = 0; 480 u32 i; 481 482 /* Find max rssi among 3 possible receivers. 483 * These values are measured by the digital signal processor (DSP). 484 * They should stay fairly constant even as the signal strength varies, 485 * if the radio's automatic gain control (AGC) is working right. 486 * AGC value (see below) will provide the "interesting" info. */ 487 for (i = 0; i < 3; i++) 488 if (valid_antennae & (1 << i)) 489 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi); 490 491 D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n", 492 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4], 493 max_rssi, agc); 494 495 /* dBm = max_rssi dB - agc dB - constant. 496 * Higher AGC (higher radio gain) means lower signal. */ 497 return max_rssi - agc - IL4965_RSSI_OFFSET; 498 } 499 500 static u32 501 il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in) 502 { 503 u32 decrypt_out = 0; 504 505 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == 506 RX_RES_STATUS_STATION_FOUND) 507 decrypt_out |= 508 (RX_RES_STATUS_STATION_FOUND | 509 RX_RES_STATUS_NO_STATION_INFO_MISMATCH); 510 511 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); 512 513 /* packet was not encrypted */ 514 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == 515 RX_RES_STATUS_SEC_TYPE_NONE) 516 return decrypt_out; 517 518 /* packet was encrypted with unknown alg */ 519 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == 520 RX_RES_STATUS_SEC_TYPE_ERR) 521 return decrypt_out; 522 523 /* decryption was not done in HW */ 524 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != 525 RX_MPDU_RES_STATUS_DEC_DONE_MSK) 526 return decrypt_out; 527 528 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { 529 530 case RX_RES_STATUS_SEC_TYPE_CCMP: 531 /* alg is CCM: check MIC only */ 532 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) 533 /* Bad MIC */ 534 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; 535 else 536 decrypt_out |= RX_RES_STATUS_DECRYPT_OK; 537 538 break; 539 540 case RX_RES_STATUS_SEC_TYPE_TKIP: 541 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { 542 /* Bad TTAK */ 543 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; 544 break; 545 } 546 /* fall through - if TTAK OK */ 547 default: 548 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) 549 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; 550 else 551 decrypt_out |= RX_RES_STATUS_DECRYPT_OK; 552 break; 553 } 554 555 D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out); 556 557 return decrypt_out; 558 } 559 560 #define SMALL_PACKET_SIZE 256 561 562 static void 563 il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr, 564 u32 len, u32 ampdu_status, struct il_rx_buf *rxb, 565 struct ieee80211_rx_status *stats) 566 { 567 struct sk_buff *skb; 568 __le16 fc = hdr->frame_control; 569 570 /* We only process data packets if the interface is open */ 571 if (unlikely(!il->is_open)) { 572 D_DROP("Dropping packet while interface is not open.\n"); 573 return; 574 } 575 576 if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) { 577 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE); 578 D_INFO("Woke queues - frame received on passive channel\n"); 579 } 580 581 /* In case of HW accelerated crypto and bad decryption, drop */ 582 if (!il->cfg->mod_params->sw_crypto && 583 il_set_decrypted_flag(il, hdr, ampdu_status, stats)) 584 return; 585 586 skb = dev_alloc_skb(SMALL_PACKET_SIZE); 587 if (!skb) { 588 IL_ERR("dev_alloc_skb failed\n"); 589 return; 590 } 591 592 if (len <= SMALL_PACKET_SIZE) { 593 skb_put_data(skb, hdr, len); 594 } else { 595 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), 596 len, PAGE_SIZE << il->hw_params.rx_page_order); 597 il->alloc_rxb_page--; 598 rxb->page = NULL; 599 } 600 601 il_update_stats(il, false, fc, len); 602 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); 603 604 ieee80211_rx(il->hw, skb); 605 } 606 607 /* Called for N_RX (legacy ABG frames), or 608 * N_RX_MPDU (HT high-throughput N frames). */ 609 static void 610 il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb) 611 { 612 struct ieee80211_hdr *header; 613 struct ieee80211_rx_status rx_status = {}; 614 struct il_rx_pkt *pkt = rxb_addr(rxb); 615 struct il_rx_phy_res *phy_res; 616 __le32 rx_pkt_status; 617 struct il_rx_mpdu_res_start *amsdu; 618 u32 len; 619 u32 ampdu_status; 620 u32 rate_n_flags; 621 622 /** 623 * N_RX and N_RX_MPDU are handled differently. 624 * N_RX: physical layer info is in this buffer 625 * N_RX_MPDU: physical layer info was sent in separate 626 * command and cached in il->last_phy_res 627 * 628 * Here we set up local variables depending on which command is 629 * received. 630 */ 631 if (pkt->hdr.cmd == N_RX) { 632 phy_res = (struct il_rx_phy_res *)pkt->u.raw; 633 header = 634 (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) + 635 phy_res->cfg_phy_cnt); 636 637 len = le16_to_cpu(phy_res->byte_count); 638 rx_pkt_status = 639 *(__le32 *) (pkt->u.raw + sizeof(*phy_res) + 640 phy_res->cfg_phy_cnt + len); 641 ampdu_status = le32_to_cpu(rx_pkt_status); 642 } else { 643 if (!il->_4965.last_phy_res_valid) { 644 IL_ERR("MPDU frame without cached PHY data\n"); 645 return; 646 } 647 phy_res = &il->_4965.last_phy_res; 648 amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw; 649 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); 650 len = le16_to_cpu(amsdu->byte_count); 651 rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len); 652 ampdu_status = 653 il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status)); 654 } 655 656 if ((unlikely(phy_res->cfg_phy_cnt > 20))) { 657 D_DROP("dsp size out of range [0,20]: %d\n", 658 phy_res->cfg_phy_cnt); 659 return; 660 } 661 662 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || 663 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { 664 D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status)); 665 return; 666 } 667 668 /* This will be used in several places later */ 669 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); 670 671 /* rx_status carries information about the packet to mac80211 */ 672 rx_status.mactime = le64_to_cpu(phy_res->timestamp); 673 rx_status.band = 674 (phy_res-> 675 phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ : 676 NL80211_BAND_5GHZ; 677 rx_status.freq = 678 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel), 679 rx_status.band); 680 rx_status.rate_idx = 681 il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); 682 rx_status.flag = 0; 683 684 /* TSF isn't reliable. In order to allow smooth user experience, 685 * this W/A doesn't propagate it to the mac80211 */ 686 /*rx_status.flag |= RX_FLAG_MACTIME_START; */ 687 688 il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp); 689 690 /* Find max signal strength (dBm) among 3 antenna/receiver chains */ 691 rx_status.signal = il4965_calc_rssi(il, phy_res); 692 693 D_STATS("Rssi %d, TSF %llu\n", rx_status.signal, 694 (unsigned long long)rx_status.mactime); 695 696 /* 697 * "antenna number" 698 * 699 * It seems that the antenna field in the phy flags value 700 * is actually a bit field. This is undefined by radiotap, 701 * it wants an actual antenna number but I always get "7" 702 * for most legacy frames I receive indicating that the 703 * same frame was received on all three RX chains. 704 * 705 * I think this field should be removed in favor of a 706 * new 802.11n radiotap field "RX chains" that is defined 707 * as a bitmask. 708 */ 709 rx_status.antenna = 710 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 711 RX_RES_PHY_FLAGS_ANTENNA_POS; 712 713 /* set the preamble flag if appropriate */ 714 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) 715 rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE; 716 717 /* Set up the HT phy flags */ 718 if (rate_n_flags & RATE_MCS_HT_MSK) 719 rx_status.encoding = RX_ENC_HT; 720 if (rate_n_flags & RATE_MCS_HT40_MSK) 721 rx_status.bw = RATE_INFO_BW_40; 722 else 723 rx_status.bw = RATE_INFO_BW_20; 724 if (rate_n_flags & RATE_MCS_SGI_MSK) 725 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI; 726 727 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) { 728 /* We know which subframes of an A-MPDU belong 729 * together since we get a single PHY response 730 * from the firmware for all of them. 731 */ 732 733 rx_status.flag |= RX_FLAG_AMPDU_DETAILS; 734 rx_status.ampdu_reference = il->_4965.ampdu_ref; 735 } 736 737 il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb, 738 &rx_status); 739 } 740 741 /* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY). 742 * This will be used later in il_hdl_rx() for N_RX_MPDU. */ 743 static void 744 il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb) 745 { 746 struct il_rx_pkt *pkt = rxb_addr(rxb); 747 il->_4965.last_phy_res_valid = true; 748 il->_4965.ampdu_ref++; 749 memcpy(&il->_4965.last_phy_res, pkt->u.raw, 750 sizeof(struct il_rx_phy_res)); 751 } 752 753 static int 754 il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif, 755 enum nl80211_band band, u8 is_active, 756 u8 n_probes, struct il_scan_channel *scan_ch) 757 { 758 struct ieee80211_channel *chan; 759 const struct ieee80211_supported_band *sband; 760 const struct il_channel_info *ch_info; 761 u16 passive_dwell = 0; 762 u16 active_dwell = 0; 763 int added, i; 764 u16 channel; 765 766 sband = il_get_hw_mode(il, band); 767 if (!sband) 768 return 0; 769 770 active_dwell = il_get_active_dwell_time(il, band, n_probes); 771 passive_dwell = il_get_passive_dwell_time(il, band, vif); 772 773 if (passive_dwell <= active_dwell) 774 passive_dwell = active_dwell + 1; 775 776 for (i = 0, added = 0; i < il->scan_request->n_channels; i++) { 777 chan = il->scan_request->channels[i]; 778 779 if (chan->band != band) 780 continue; 781 782 channel = chan->hw_value; 783 scan_ch->channel = cpu_to_le16(channel); 784 785 ch_info = il_get_channel_info(il, band, channel); 786 if (!il_is_channel_valid(ch_info)) { 787 D_SCAN("Channel %d is INVALID for this band.\n", 788 channel); 789 continue; 790 } 791 792 if (!is_active || il_is_channel_passive(ch_info) || 793 (chan->flags & IEEE80211_CHAN_NO_IR)) 794 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; 795 else 796 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; 797 798 if (n_probes) 799 scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes); 800 801 scan_ch->active_dwell = cpu_to_le16(active_dwell); 802 scan_ch->passive_dwell = cpu_to_le16(passive_dwell); 803 804 /* Set txpower levels to defaults */ 805 scan_ch->dsp_atten = 110; 806 807 /* NOTE: if we were doing 6Mb OFDM for scans we'd use 808 * power level: 809 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; 810 */ 811 if (band == NL80211_BAND_5GHZ) 812 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; 813 else 814 scan_ch->tx_gain = ((1 << 5) | (5 << 3)); 815 816 D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel, 817 le32_to_cpu(scan_ch->type), 818 (scan_ch-> 819 type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE", 820 (scan_ch-> 821 type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell : 822 passive_dwell); 823 824 scan_ch++; 825 added++; 826 } 827 828 D_SCAN("total channels to scan %d\n", added); 829 return added; 830 } 831 832 static void 833 il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid) 834 { 835 int i; 836 u8 ind = *ant; 837 838 for (i = 0; i < RATE_ANT_NUM - 1; i++) { 839 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0; 840 if (valid & BIT(ind)) { 841 *ant = ind; 842 return; 843 } 844 } 845 } 846 847 int 848 il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif) 849 { 850 struct il_host_cmd cmd = { 851 .id = C_SCAN, 852 .len = sizeof(struct il_scan_cmd), 853 .flags = CMD_SIZE_HUGE, 854 }; 855 struct il_scan_cmd *scan; 856 u32 rate_flags = 0; 857 u16 cmd_len; 858 u16 rx_chain = 0; 859 enum nl80211_band band; 860 u8 n_probes = 0; 861 u8 rx_ant = il->hw_params.valid_rx_ant; 862 u8 rate; 863 bool is_active = false; 864 int chan_mod; 865 u8 active_chains; 866 u8 scan_tx_antennas = il->hw_params.valid_tx_ant; 867 int ret; 868 869 lockdep_assert_held(&il->mutex); 870 871 if (!il->scan_cmd) { 872 il->scan_cmd = 873 kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE, 874 GFP_KERNEL); 875 if (!il->scan_cmd) { 876 D_SCAN("fail to allocate memory for scan\n"); 877 return -ENOMEM; 878 } 879 } 880 scan = il->scan_cmd; 881 memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE); 882 883 scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH; 884 scan->quiet_time = IL_ACTIVE_QUIET_TIME; 885 886 if (il_is_any_associated(il)) { 887 u16 interval; 888 u32 extra; 889 u32 suspend_time = 100; 890 u32 scan_suspend_time = 100; 891 892 D_INFO("Scanning while associated...\n"); 893 interval = vif->bss_conf.beacon_int; 894 895 scan->suspend_time = 0; 896 scan->max_out_time = cpu_to_le32(200 * 1024); 897 if (!interval) 898 interval = suspend_time; 899 900 extra = (suspend_time / interval) << 22; 901 scan_suspend_time = 902 (extra | ((suspend_time % interval) * 1024)); 903 scan->suspend_time = cpu_to_le32(scan_suspend_time); 904 D_SCAN("suspend_time 0x%X beacon interval %d\n", 905 scan_suspend_time, interval); 906 } 907 908 if (il->scan_request->n_ssids) { 909 int i, p = 0; 910 D_SCAN("Kicking off active scan\n"); 911 for (i = 0; i < il->scan_request->n_ssids; i++) { 912 /* always does wildcard anyway */ 913 if (!il->scan_request->ssids[i].ssid_len) 914 continue; 915 scan->direct_scan[p].id = WLAN_EID_SSID; 916 scan->direct_scan[p].len = 917 il->scan_request->ssids[i].ssid_len; 918 memcpy(scan->direct_scan[p].ssid, 919 il->scan_request->ssids[i].ssid, 920 il->scan_request->ssids[i].ssid_len); 921 n_probes++; 922 p++; 923 } 924 is_active = true; 925 } else 926 D_SCAN("Start passive scan.\n"); 927 928 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; 929 scan->tx_cmd.sta_id = il->hw_params.bcast_id; 930 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 931 932 switch (il->scan_band) { 933 case NL80211_BAND_2GHZ: 934 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; 935 chan_mod = 936 le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >> 937 RXON_FLG_CHANNEL_MODE_POS; 938 if (chan_mod == CHANNEL_MODE_PURE_40) { 939 rate = RATE_6M_PLCP; 940 } else { 941 rate = RATE_1M_PLCP; 942 rate_flags = RATE_MCS_CCK_MSK; 943 } 944 break; 945 case NL80211_BAND_5GHZ: 946 rate = RATE_6M_PLCP; 947 break; 948 default: 949 IL_WARN("Invalid scan band\n"); 950 return -EIO; 951 } 952 953 /* 954 * If active scanning is requested but a certain channel is 955 * marked passive, we can do active scanning if we detect 956 * transmissions. 957 * 958 * There is an issue with some firmware versions that triggers 959 * a sysassert on a "good CRC threshold" of zero (== disabled), 960 * on a radar channel even though this means that we should NOT 961 * send probes. 962 * 963 * The "good CRC threshold" is the number of frames that we 964 * need to receive during our dwell time on a channel before 965 * sending out probes -- setting this to a huge value will 966 * mean we never reach it, but at the same time work around 967 * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER 968 * here instead of IL_GOOD_CRC_TH_DISABLED. 969 */ 970 scan->good_CRC_th = 971 is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER; 972 973 band = il->scan_band; 974 975 if (il->cfg->scan_rx_antennas[band]) 976 rx_ant = il->cfg->scan_rx_antennas[band]; 977 978 il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas); 979 rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS; 980 scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags); 981 982 /* In power save mode use one chain, otherwise use all chains */ 983 if (test_bit(S_POWER_PMI, &il->status)) { 984 /* rx_ant has been set to all valid chains previously */ 985 active_chains = 986 rx_ant & ((u8) (il->chain_noise_data.active_chains)); 987 if (!active_chains) 988 active_chains = rx_ant; 989 990 D_SCAN("chain_noise_data.active_chains: %u\n", 991 il->chain_noise_data.active_chains); 992 993 rx_ant = il4965_first_antenna(active_chains); 994 } 995 996 /* MIMO is not used here, but value is required */ 997 rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; 998 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; 999 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; 1000 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; 1001 scan->rx_chain = cpu_to_le16(rx_chain); 1002 1003 cmd_len = 1004 il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data, 1005 vif->addr, il->scan_request->ie, 1006 il->scan_request->ie_len, 1007 IL_MAX_SCAN_SIZE - sizeof(*scan)); 1008 scan->tx_cmd.len = cpu_to_le16(cmd_len); 1009 1010 scan->filter_flags |= 1011 (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK); 1012 1013 scan->channel_count = 1014 il4965_get_channels_for_scan(il, vif, band, is_active, n_probes, 1015 (void *)&scan->data[cmd_len]); 1016 if (scan->channel_count == 0) { 1017 D_SCAN("channel count %d\n", scan->channel_count); 1018 return -EIO; 1019 } 1020 1021 cmd.len += 1022 le16_to_cpu(scan->tx_cmd.len) + 1023 scan->channel_count * sizeof(struct il_scan_channel); 1024 cmd.data = scan; 1025 scan->len = cpu_to_le16(cmd.len); 1026 1027 set_bit(S_SCAN_HW, &il->status); 1028 1029 ret = il_send_cmd_sync(il, &cmd); 1030 if (ret) 1031 clear_bit(S_SCAN_HW, &il->status); 1032 1033 return ret; 1034 } 1035 1036 int 1037 il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif, 1038 bool add) 1039 { 1040 struct il_vif_priv *vif_priv = (void *)vif->drv_priv; 1041 1042 if (add) 1043 return il4965_add_bssid_station(il, vif->bss_conf.bssid, 1044 &vif_priv->ibss_bssid_sta_id); 1045 return il_remove_station(il, vif_priv->ibss_bssid_sta_id, 1046 vif->bss_conf.bssid); 1047 } 1048 1049 void 1050 il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed) 1051 { 1052 lockdep_assert_held(&il->sta_lock); 1053 1054 if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed) 1055 il->stations[sta_id].tid[tid].tfds_in_queue -= freed; 1056 else { 1057 D_TX("free more than tfds_in_queue (%u:%d)\n", 1058 il->stations[sta_id].tid[tid].tfds_in_queue, freed); 1059 il->stations[sta_id].tid[tid].tfds_in_queue = 0; 1060 } 1061 } 1062 1063 #define IL_TX_QUEUE_MSK 0xfffff 1064 1065 static bool 1066 il4965_is_single_rx_stream(struct il_priv *il) 1067 { 1068 return il->current_ht_config.smps == IEEE80211_SMPS_STATIC || 1069 il->current_ht_config.single_chain_sufficient; 1070 } 1071 1072 #define IL_NUM_RX_CHAINS_MULTIPLE 3 1073 #define IL_NUM_RX_CHAINS_SINGLE 2 1074 #define IL_NUM_IDLE_CHAINS_DUAL 2 1075 #define IL_NUM_IDLE_CHAINS_SINGLE 1 1076 1077 /* 1078 * Determine how many receiver/antenna chains to use. 1079 * 1080 * More provides better reception via diversity. Fewer saves power 1081 * at the expense of throughput, but only when not in powersave to 1082 * start with. 1083 * 1084 * MIMO (dual stream) requires at least 2, but works better with 3. 1085 * This does not determine *which* chains to use, just how many. 1086 */ 1087 static int 1088 il4965_get_active_rx_chain_count(struct il_priv *il) 1089 { 1090 /* # of Rx chains to use when expecting MIMO. */ 1091 if (il4965_is_single_rx_stream(il)) 1092 return IL_NUM_RX_CHAINS_SINGLE; 1093 else 1094 return IL_NUM_RX_CHAINS_MULTIPLE; 1095 } 1096 1097 /* 1098 * When we are in power saving mode, unless device support spatial 1099 * multiplexing power save, use the active count for rx chain count. 1100 */ 1101 static int 1102 il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt) 1103 { 1104 /* # Rx chains when idling, depending on SMPS mode */ 1105 switch (il->current_ht_config.smps) { 1106 case IEEE80211_SMPS_STATIC: 1107 case IEEE80211_SMPS_DYNAMIC: 1108 return IL_NUM_IDLE_CHAINS_SINGLE; 1109 case IEEE80211_SMPS_OFF: 1110 return active_cnt; 1111 default: 1112 WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps); 1113 return active_cnt; 1114 } 1115 } 1116 1117 /* up to 4 chains */ 1118 static u8 1119 il4965_count_chain_bitmap(u32 chain_bitmap) 1120 { 1121 u8 res; 1122 res = (chain_bitmap & BIT(0)) >> 0; 1123 res += (chain_bitmap & BIT(1)) >> 1; 1124 res += (chain_bitmap & BIT(2)) >> 2; 1125 res += (chain_bitmap & BIT(3)) >> 3; 1126 return res; 1127 } 1128 1129 /** 1130 * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image 1131 * 1132 * Selects how many and which Rx receivers/antennas/chains to use. 1133 * This should not be used for scan command ... it puts data in wrong place. 1134 */ 1135 void 1136 il4965_set_rxon_chain(struct il_priv *il) 1137 { 1138 bool is_single = il4965_is_single_rx_stream(il); 1139 bool is_cam = !test_bit(S_POWER_PMI, &il->status); 1140 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt; 1141 u32 active_chains; 1142 u16 rx_chain; 1143 1144 /* Tell uCode which antennas are actually connected. 1145 * Before first association, we assume all antennas are connected. 1146 * Just after first association, il4965_chain_noise_calibration() 1147 * checks which antennas actually *are* connected. */ 1148 if (il->chain_noise_data.active_chains) 1149 active_chains = il->chain_noise_data.active_chains; 1150 else 1151 active_chains = il->hw_params.valid_rx_ant; 1152 1153 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS; 1154 1155 /* How many receivers should we use? */ 1156 active_rx_cnt = il4965_get_active_rx_chain_count(il); 1157 idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt); 1158 1159 /* correct rx chain count according hw settings 1160 * and chain noise calibration 1161 */ 1162 valid_rx_cnt = il4965_count_chain_bitmap(active_chains); 1163 if (valid_rx_cnt < active_rx_cnt) 1164 active_rx_cnt = valid_rx_cnt; 1165 1166 if (valid_rx_cnt < idle_rx_cnt) 1167 idle_rx_cnt = valid_rx_cnt; 1168 1169 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS; 1170 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS; 1171 1172 il->staging.rx_chain = cpu_to_le16(rx_chain); 1173 1174 if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam) 1175 il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK; 1176 else 1177 il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK; 1178 1179 D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain, 1180 active_rx_cnt, idle_rx_cnt); 1181 1182 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 || 1183 active_rx_cnt < idle_rx_cnt); 1184 } 1185 1186 static const char * 1187 il4965_get_fh_string(int cmd) 1188 { 1189 switch (cmd) { 1190 IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG); 1191 IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG); 1192 IL_CMD(FH49_RSCSR_CHNL0_WPTR); 1193 IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG); 1194 IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG); 1195 IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG); 1196 IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); 1197 IL_CMD(FH49_TSSR_TX_STATUS_REG); 1198 IL_CMD(FH49_TSSR_TX_ERROR_REG); 1199 default: 1200 return "UNKNOWN"; 1201 } 1202 } 1203 1204 int 1205 il4965_dump_fh(struct il_priv *il, char **buf, bool display) 1206 { 1207 int i; 1208 #ifdef CONFIG_IWLEGACY_DEBUG 1209 int pos = 0; 1210 size_t bufsz = 0; 1211 #endif 1212 static const u32 fh_tbl[] = { 1213 FH49_RSCSR_CHNL0_STTS_WPTR_REG, 1214 FH49_RSCSR_CHNL0_RBDCB_BASE_REG, 1215 FH49_RSCSR_CHNL0_WPTR, 1216 FH49_MEM_RCSR_CHNL0_CONFIG_REG, 1217 FH49_MEM_RSSR_SHARED_CTRL_REG, 1218 FH49_MEM_RSSR_RX_STATUS_REG, 1219 FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, 1220 FH49_TSSR_TX_STATUS_REG, 1221 FH49_TSSR_TX_ERROR_REG 1222 }; 1223 #ifdef CONFIG_IWLEGACY_DEBUG 1224 if (display) { 1225 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; 1226 *buf = kmalloc(bufsz, GFP_KERNEL); 1227 if (!*buf) 1228 return -ENOMEM; 1229 pos += 1230 scnprintf(*buf + pos, bufsz - pos, "FH register values:\n"); 1231 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 1232 pos += 1233 scnprintf(*buf + pos, bufsz - pos, 1234 " %34s: 0X%08x\n", 1235 il4965_get_fh_string(fh_tbl[i]), 1236 il_rd(il, fh_tbl[i])); 1237 } 1238 return pos; 1239 } 1240 #endif 1241 IL_ERR("FH register values:\n"); 1242 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 1243 IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]), 1244 il_rd(il, fh_tbl[i])); 1245 } 1246 return 0; 1247 } 1248 1249 static void 1250 il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb) 1251 { 1252 struct il_rx_pkt *pkt = rxb_addr(rxb); 1253 struct il_missed_beacon_notif *missed_beacon; 1254 1255 missed_beacon = &pkt->u.missed_beacon; 1256 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) > 1257 il->missed_beacon_threshold) { 1258 D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n", 1259 le32_to_cpu(missed_beacon->consecutive_missed_beacons), 1260 le32_to_cpu(missed_beacon->total_missed_becons), 1261 le32_to_cpu(missed_beacon->num_recvd_beacons), 1262 le32_to_cpu(missed_beacon->num_expected_beacons)); 1263 if (!test_bit(S_SCANNING, &il->status)) 1264 il4965_init_sensitivity(il); 1265 } 1266 } 1267 1268 /* Calculate noise level, based on measurements during network silence just 1269 * before arriving beacon. This measurement can be done only if we know 1270 * exactly when to expect beacons, therefore only when we're associated. */ 1271 static void 1272 il4965_rx_calc_noise(struct il_priv *il) 1273 { 1274 struct stats_rx_non_phy *rx_info; 1275 int num_active_rx = 0; 1276 int total_silence = 0; 1277 int bcn_silence_a, bcn_silence_b, bcn_silence_c; 1278 int last_rx_noise; 1279 1280 rx_info = &(il->_4965.stats.rx.general); 1281 bcn_silence_a = 1282 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; 1283 bcn_silence_b = 1284 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; 1285 bcn_silence_c = 1286 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; 1287 1288 if (bcn_silence_a) { 1289 total_silence += bcn_silence_a; 1290 num_active_rx++; 1291 } 1292 if (bcn_silence_b) { 1293 total_silence += bcn_silence_b; 1294 num_active_rx++; 1295 } 1296 if (bcn_silence_c) { 1297 total_silence += bcn_silence_c; 1298 num_active_rx++; 1299 } 1300 1301 /* Average among active antennas */ 1302 if (num_active_rx) 1303 last_rx_noise = (total_silence / num_active_rx) - 107; 1304 else 1305 last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE; 1306 1307 D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a, 1308 bcn_silence_b, bcn_silence_c, last_rx_noise); 1309 } 1310 1311 #ifdef CONFIG_IWLEGACY_DEBUGFS 1312 /* 1313 * based on the assumption of all stats counter are in DWORD 1314 * FIXME: This function is for debugging, do not deal with 1315 * the case of counters roll-over. 1316 */ 1317 static void 1318 il4965_accumulative_stats(struct il_priv *il, __le32 * stats) 1319 { 1320 int i, size; 1321 __le32 *prev_stats; 1322 u32 *accum_stats; 1323 u32 *delta, *max_delta; 1324 struct stats_general_common *general, *accum_general; 1325 1326 prev_stats = (__le32 *) &il->_4965.stats; 1327 accum_stats = (u32 *) &il->_4965.accum_stats; 1328 size = sizeof(struct il_notif_stats); 1329 general = &il->_4965.stats.general.common; 1330 accum_general = &il->_4965.accum_stats.general.common; 1331 delta = (u32 *) &il->_4965.delta_stats; 1332 max_delta = (u32 *) &il->_4965.max_delta; 1333 1334 for (i = sizeof(__le32); i < size; 1335 i += 1336 sizeof(__le32), stats++, prev_stats++, delta++, max_delta++, 1337 accum_stats++) { 1338 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) { 1339 *delta = 1340 (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats)); 1341 *accum_stats += *delta; 1342 if (*delta > *max_delta) 1343 *max_delta = *delta; 1344 } 1345 } 1346 1347 /* reset accumulative stats for "no-counter" type stats */ 1348 accum_general->temperature = general->temperature; 1349 accum_general->ttl_timestamp = general->ttl_timestamp; 1350 } 1351 #endif 1352 1353 static void 1354 il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb) 1355 { 1356 const int recalib_seconds = 60; 1357 bool change; 1358 struct il_rx_pkt *pkt = rxb_addr(rxb); 1359 1360 D_RX("Statistics notification received (%d vs %d).\n", 1361 (int)sizeof(struct il_notif_stats), 1362 le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK); 1363 1364 change = 1365 ((il->_4965.stats.general.common.temperature != 1366 pkt->u.stats.general.common.temperature) || 1367 ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) != 1368 (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK))); 1369 #ifdef CONFIG_IWLEGACY_DEBUGFS 1370 il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats); 1371 #endif 1372 1373 /* TODO: reading some of stats is unneeded */ 1374 memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats)); 1375 1376 set_bit(S_STATS, &il->status); 1377 1378 /* 1379 * Reschedule the stats timer to occur in recalib_seconds to ensure 1380 * we get a thermal update even if the uCode doesn't give us one 1381 */ 1382 mod_timer(&il->stats_periodic, 1383 jiffies + msecs_to_jiffies(recalib_seconds * 1000)); 1384 1385 if (unlikely(!test_bit(S_SCANNING, &il->status)) && 1386 (pkt->hdr.cmd == N_STATS)) { 1387 il4965_rx_calc_noise(il); 1388 queue_work(il->workqueue, &il->run_time_calib_work); 1389 } 1390 1391 if (change) 1392 il4965_temperature_calib(il); 1393 } 1394 1395 static void 1396 il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb) 1397 { 1398 struct il_rx_pkt *pkt = rxb_addr(rxb); 1399 1400 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) { 1401 #ifdef CONFIG_IWLEGACY_DEBUGFS 1402 memset(&il->_4965.accum_stats, 0, 1403 sizeof(struct il_notif_stats)); 1404 memset(&il->_4965.delta_stats, 0, 1405 sizeof(struct il_notif_stats)); 1406 memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats)); 1407 #endif 1408 D_RX("Statistics have been cleared\n"); 1409 } 1410 il4965_hdl_stats(il, rxb); 1411 } 1412 1413 1414 /* 1415 * mac80211 queues, ACs, hardware queues, FIFOs. 1416 * 1417 * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues 1418 * 1419 * Mac80211 uses the following numbers, which we get as from it 1420 * by way of skb_get_queue_mapping(skb): 1421 * 1422 * VO 0 1423 * VI 1 1424 * BE 2 1425 * BK 3 1426 * 1427 * 1428 * Regular (not A-MPDU) frames are put into hardware queues corresponding 1429 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their 1430 * own queue per aggregation session (RA/TID combination), such queues are 1431 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In 1432 * order to map frames to the right queue, we also need an AC->hw queue 1433 * mapping. This is implemented here. 1434 * 1435 * Due to the way hw queues are set up (by the hw specific modules like 1436 * 4965.c), the AC->hw queue mapping is the identity 1437 * mapping. 1438 */ 1439 1440 static const u8 tid_to_ac[] = { 1441 IEEE80211_AC_BE, 1442 IEEE80211_AC_BK, 1443 IEEE80211_AC_BK, 1444 IEEE80211_AC_BE, 1445 IEEE80211_AC_VI, 1446 IEEE80211_AC_VI, 1447 IEEE80211_AC_VO, 1448 IEEE80211_AC_VO 1449 }; 1450 1451 static inline int 1452 il4965_get_ac_from_tid(u16 tid) 1453 { 1454 if (likely(tid < ARRAY_SIZE(tid_to_ac))) 1455 return tid_to_ac[tid]; 1456 1457 /* no support for TIDs 8-15 yet */ 1458 return -EINVAL; 1459 } 1460 1461 static inline int 1462 il4965_get_fifo_from_tid(u16 tid) 1463 { 1464 static const u8 ac_to_fifo[] = { 1465 IL_TX_FIFO_VO, 1466 IL_TX_FIFO_VI, 1467 IL_TX_FIFO_BE, 1468 IL_TX_FIFO_BK, 1469 }; 1470 1471 if (likely(tid < ARRAY_SIZE(tid_to_ac))) 1472 return ac_to_fifo[tid_to_ac[tid]]; 1473 1474 /* no support for TIDs 8-15 yet */ 1475 return -EINVAL; 1476 } 1477 1478 /* 1479 * handle build C_TX command notification. 1480 */ 1481 static void 1482 il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb, 1483 struct il_tx_cmd *tx_cmd, 1484 struct ieee80211_tx_info *info, 1485 struct ieee80211_hdr *hdr, u8 std_id) 1486 { 1487 __le16 fc = hdr->frame_control; 1488 __le32 tx_flags = tx_cmd->tx_flags; 1489 1490 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 1491 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { 1492 tx_flags |= TX_CMD_FLG_ACK_MSK; 1493 if (ieee80211_is_mgmt(fc)) 1494 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1495 if (ieee80211_is_probe_resp(fc) && 1496 !(le16_to_cpu(hdr->seq_ctrl) & 0xf)) 1497 tx_flags |= TX_CMD_FLG_TSF_MSK; 1498 } else { 1499 tx_flags &= (~TX_CMD_FLG_ACK_MSK); 1500 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1501 } 1502 1503 if (ieee80211_is_back_req(fc)) 1504 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; 1505 1506 tx_cmd->sta_id = std_id; 1507 if (ieee80211_has_morefrags(fc)) 1508 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; 1509 1510 if (ieee80211_is_data_qos(fc)) { 1511 u8 *qc = ieee80211_get_qos_ctl(hdr); 1512 tx_cmd->tid_tspec = qc[0] & 0xf; 1513 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 1514 } else { 1515 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1516 } 1517 1518 il_tx_cmd_protection(il, info, fc, &tx_flags); 1519 1520 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); 1521 if (ieee80211_is_mgmt(fc)) { 1522 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 1523 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); 1524 else 1525 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); 1526 } else { 1527 tx_cmd->timeout.pm_frame_timeout = 0; 1528 } 1529 1530 tx_cmd->driver_txop = 0; 1531 tx_cmd->tx_flags = tx_flags; 1532 tx_cmd->next_frame_len = 0; 1533 } 1534 1535 static void 1536 il4965_tx_cmd_build_rate(struct il_priv *il, 1537 struct il_tx_cmd *tx_cmd, 1538 struct ieee80211_tx_info *info, 1539 struct ieee80211_sta *sta, 1540 __le16 fc) 1541 { 1542 const u8 rts_retry_limit = 60; 1543 u32 rate_flags; 1544 int rate_idx; 1545 u8 data_retry_limit; 1546 u8 rate_plcp; 1547 1548 /* Set retry limit on DATA packets and Probe Responses */ 1549 if (ieee80211_is_probe_resp(fc)) 1550 data_retry_limit = 3; 1551 else 1552 data_retry_limit = IL4965_DEFAULT_TX_RETRY; 1553 tx_cmd->data_retry_limit = data_retry_limit; 1554 /* Set retry limit on RTS packets */ 1555 tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit); 1556 1557 /* DATA packets will use the uCode station table for rate/antenna 1558 * selection */ 1559 if (ieee80211_is_data(fc)) { 1560 tx_cmd->initial_rate_idx = 0; 1561 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 1562 return; 1563 } 1564 1565 /** 1566 * If the current TX rate stored in mac80211 has the MCS bit set, it's 1567 * not really a TX rate. Thus, we use the lowest supported rate for 1568 * this band. Also use the lowest supported rate if the stored rate 1569 * idx is invalid. 1570 */ 1571 rate_idx = info->control.rates[0].idx; 1572 if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0 1573 || rate_idx > RATE_COUNT_LEGACY) 1574 rate_idx = rate_lowest_index(&il->bands[info->band], sta); 1575 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 1576 if (info->band == NL80211_BAND_5GHZ) 1577 rate_idx += IL_FIRST_OFDM_RATE; 1578 /* Get PLCP rate for tx_cmd->rate_n_flags */ 1579 rate_plcp = il_rates[rate_idx].plcp; 1580 /* Zero out flags for this packet */ 1581 rate_flags = 0; 1582 1583 /* Set CCK flag as needed */ 1584 if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE) 1585 rate_flags |= RATE_MCS_CCK_MSK; 1586 1587 /* Set up antennas */ 1588 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); 1589 rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; 1590 1591 /* Set the rate in the TX cmd */ 1592 tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags); 1593 } 1594 1595 static void 1596 il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info, 1597 struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag, 1598 int sta_id) 1599 { 1600 struct ieee80211_key_conf *keyconf = info->control.hw_key; 1601 1602 switch (keyconf->cipher) { 1603 case WLAN_CIPHER_SUITE_CCMP: 1604 tx_cmd->sec_ctl = TX_CMD_SEC_CCM; 1605 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); 1606 if (info->flags & IEEE80211_TX_CTL_AMPDU) 1607 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; 1608 D_TX("tx_cmd with AES hwcrypto\n"); 1609 break; 1610 1611 case WLAN_CIPHER_SUITE_TKIP: 1612 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 1613 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 1614 D_TX("tx_cmd with tkip hwcrypto\n"); 1615 break; 1616 1617 case WLAN_CIPHER_SUITE_WEP104: 1618 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 1619 /* fall through */ 1620 case WLAN_CIPHER_SUITE_WEP40: 1621 tx_cmd->sec_ctl |= 1622 (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) << 1623 TX_CMD_SEC_SHIFT); 1624 1625 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 1626 1627 D_TX("Configuring packet for WEP encryption " "with key %d\n", 1628 keyconf->keyidx); 1629 break; 1630 1631 default: 1632 IL_ERR("Unknown encode cipher %x\n", keyconf->cipher); 1633 break; 1634 } 1635 } 1636 1637 /* 1638 * start C_TX command process 1639 */ 1640 int 1641 il4965_tx_skb(struct il_priv *il, 1642 struct ieee80211_sta *sta, 1643 struct sk_buff *skb) 1644 { 1645 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1646 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1647 struct il_station_priv *sta_priv = NULL; 1648 struct il_tx_queue *txq; 1649 struct il_queue *q; 1650 struct il_device_cmd *out_cmd; 1651 struct il_cmd_meta *out_meta; 1652 struct il_tx_cmd *tx_cmd; 1653 int txq_id; 1654 dma_addr_t phys_addr; 1655 dma_addr_t txcmd_phys; 1656 dma_addr_t scratch_phys; 1657 u16 len, firstlen, secondlen; 1658 u16 seq_number = 0; 1659 __le16 fc; 1660 u8 hdr_len; 1661 u8 sta_id; 1662 u8 wait_write_ptr = 0; 1663 u8 tid = 0; 1664 u8 *qc = NULL; 1665 unsigned long flags; 1666 bool is_agg = false; 1667 1668 spin_lock_irqsave(&il->lock, flags); 1669 if (il_is_rfkill(il)) { 1670 D_DROP("Dropping - RF KILL\n"); 1671 goto drop_unlock; 1672 } 1673 1674 fc = hdr->frame_control; 1675 1676 #ifdef CONFIG_IWLEGACY_DEBUG 1677 if (ieee80211_is_auth(fc)) 1678 D_TX("Sending AUTH frame\n"); 1679 else if (ieee80211_is_assoc_req(fc)) 1680 D_TX("Sending ASSOC frame\n"); 1681 else if (ieee80211_is_reassoc_req(fc)) 1682 D_TX("Sending REASSOC frame\n"); 1683 #endif 1684 1685 hdr_len = ieee80211_hdrlen(fc); 1686 1687 /* For management frames use broadcast id to do not break aggregation */ 1688 if (!ieee80211_is_data(fc)) 1689 sta_id = il->hw_params.bcast_id; 1690 else { 1691 /* Find idx into station table for destination station */ 1692 sta_id = il_sta_id_or_broadcast(il, sta); 1693 1694 if (sta_id == IL_INVALID_STATION) { 1695 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1); 1696 goto drop_unlock; 1697 } 1698 } 1699 1700 D_TX("station Id %d\n", sta_id); 1701 1702 if (sta) 1703 sta_priv = (void *)sta->drv_priv; 1704 1705 if (sta_priv && sta_priv->asleep && 1706 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { 1707 /* 1708 * This sends an asynchronous command to the device, 1709 * but we can rely on it being processed before the 1710 * next frame is processed -- and the next frame to 1711 * this station is the one that will consume this 1712 * counter. 1713 * For now set the counter to just 1 since we do not 1714 * support uAPSD yet. 1715 */ 1716 il4965_sta_modify_sleep_tx_count(il, sta_id, 1); 1717 } 1718 1719 /* FIXME: remove me ? */ 1720 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1721 1722 /* Access category (AC) is also the queue number */ 1723 txq_id = skb_get_queue_mapping(skb); 1724 1725 /* irqs already disabled/saved above when locking il->lock */ 1726 spin_lock(&il->sta_lock); 1727 1728 if (ieee80211_is_data_qos(fc)) { 1729 qc = ieee80211_get_qos_ctl(hdr); 1730 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 1731 if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) { 1732 spin_unlock(&il->sta_lock); 1733 goto drop_unlock; 1734 } 1735 seq_number = il->stations[sta_id].tid[tid].seq_number; 1736 seq_number &= IEEE80211_SCTL_SEQ; 1737 hdr->seq_ctrl = 1738 hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG); 1739 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1740 seq_number += 0x10; 1741 /* aggregation is on for this <sta,tid> */ 1742 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1743 il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) { 1744 txq_id = il->stations[sta_id].tid[tid].agg.txq_id; 1745 is_agg = true; 1746 } 1747 } 1748 1749 txq = &il->txq[txq_id]; 1750 q = &txq->q; 1751 1752 if (unlikely(il_queue_space(q) < q->high_mark)) { 1753 spin_unlock(&il->sta_lock); 1754 goto drop_unlock; 1755 } 1756 1757 if (ieee80211_is_data_qos(fc)) { 1758 il->stations[sta_id].tid[tid].tfds_in_queue++; 1759 if (!ieee80211_has_morefrags(fc)) 1760 il->stations[sta_id].tid[tid].seq_number = seq_number; 1761 } 1762 1763 spin_unlock(&il->sta_lock); 1764 1765 txq->skbs[q->write_ptr] = skb; 1766 1767 /* Set up first empty entry in queue's array of Tx/cmd buffers */ 1768 out_cmd = txq->cmd[q->write_ptr]; 1769 out_meta = &txq->meta[q->write_ptr]; 1770 tx_cmd = &out_cmd->cmd.tx; 1771 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); 1772 memset(tx_cmd, 0, sizeof(struct il_tx_cmd)); 1773 1774 /* 1775 * Set up the Tx-command (not MAC!) header. 1776 * Store the chosen Tx queue and TFD idx within the sequence field; 1777 * after Tx, uCode's Tx response will return this value so driver can 1778 * locate the frame within the tx queue and do post-tx processing. 1779 */ 1780 out_cmd->hdr.cmd = C_TX; 1781 out_cmd->hdr.sequence = 1782 cpu_to_le16((u16) 1783 (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr))); 1784 1785 /* Copy MAC header from skb into command buffer */ 1786 memcpy(tx_cmd->hdr, hdr, hdr_len); 1787 1788 /* Total # bytes to be transmitted */ 1789 tx_cmd->len = cpu_to_le16((u16) skb->len); 1790 1791 if (info->control.hw_key) 1792 il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id); 1793 1794 /* TODO need this for burst mode later on */ 1795 il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id); 1796 1797 il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc); 1798 1799 /* 1800 * Use the first empty entry in this queue's command buffer array 1801 * to contain the Tx command and MAC header concatenated together 1802 * (payload data will be in another buffer). 1803 * Size of this varies, due to varying MAC header length. 1804 * If end is not dword aligned, we'll have 2 extra bytes at the end 1805 * of the MAC header (device reads on dword boundaries). 1806 * We'll tell device about this padding later. 1807 */ 1808 len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len; 1809 firstlen = (len + 3) & ~3; 1810 1811 /* Tell NIC about any 2-byte padding after MAC header */ 1812 if (firstlen != len) 1813 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; 1814 1815 /* Physical address of this Tx command's header (not MAC header!), 1816 * within command buffer array. */ 1817 txcmd_phys = 1818 pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen, 1819 PCI_DMA_BIDIRECTIONAL); 1820 if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys))) 1821 goto drop_unlock; 1822 1823 /* Set up TFD's 2nd entry to point directly to remainder of skb, 1824 * if any (802.11 null frames have no payload). */ 1825 secondlen = skb->len - hdr_len; 1826 if (secondlen > 0) { 1827 phys_addr = 1828 pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen, 1829 PCI_DMA_TODEVICE); 1830 if (unlikely(pci_dma_mapping_error(il->pci_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 pci_dma_sync_single_for_cpu(il->pci_dev, txcmd_phys, firstlen, 1856 PCI_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 pci_dma_sync_single_for_device(il->pci_dev, txcmd_phys, firstlen, 1872 PCI_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 * @param il 1966 * @return error code 1967 */ 1968 int 1969 il4965_txq_ctx_alloc(struct il_priv *il) 1970 { 1971 int ret, txq_id; 1972 unsigned long flags; 1973 1974 /* Free all tx/cmd queues and keep-warm buffer */ 1975 il4965_hw_txq_ctx_free(il); 1976 1977 ret = 1978 il4965_alloc_dma_ptr(il, &il->scd_bc_tbls, 1979 il->hw_params.scd_bc_tbls_size); 1980 if (ret) { 1981 IL_ERR("Scheduler BC Table allocation failed\n"); 1982 goto error_bc_tbls; 1983 } 1984 /* Alloc keep-warm buffer */ 1985 ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE); 1986 if (ret) { 1987 IL_ERR("Keep Warm allocation failed\n"); 1988 goto error_kw; 1989 } 1990 1991 /* allocate tx queue structure */ 1992 ret = il_alloc_txq_mem(il); 1993 if (ret) 1994 goto error; 1995 1996 spin_lock_irqsave(&il->lock, flags); 1997 1998 /* Turn off all Tx DMA fifos */ 1999 il4965_txq_set_sched(il, 0); 2000 2001 /* Tell NIC where to find the "keep warm" buffer */ 2002 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); 2003 2004 spin_unlock_irqrestore(&il->lock, flags); 2005 2006 /* Alloc and init all Tx queues, including the command queue (#4/#9) */ 2007 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) { 2008 ret = il_tx_queue_init(il, txq_id); 2009 if (ret) { 2010 IL_ERR("Tx %d queue init failed\n", txq_id); 2011 goto error; 2012 } 2013 } 2014 2015 return ret; 2016 2017 error: 2018 il4965_hw_txq_ctx_free(il); 2019 il4965_free_dma_ptr(il, &il->kw); 2020 error_kw: 2021 il4965_free_dma_ptr(il, &il->scd_bc_tbls); 2022 error_bc_tbls: 2023 return ret; 2024 } 2025 2026 void 2027 il4965_txq_ctx_reset(struct il_priv *il) 2028 { 2029 int txq_id; 2030 unsigned long flags; 2031 2032 spin_lock_irqsave(&il->lock, flags); 2033 2034 /* Turn off all Tx DMA fifos */ 2035 il4965_txq_set_sched(il, 0); 2036 /* Tell NIC where to find the "keep warm" buffer */ 2037 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); 2038 2039 spin_unlock_irqrestore(&il->lock, flags); 2040 2041 /* Alloc and init all Tx queues, including the command queue (#4) */ 2042 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2043 il_tx_queue_reset(il, txq_id); 2044 } 2045 2046 static void 2047 il4965_txq_ctx_unmap(struct il_priv *il) 2048 { 2049 int txq_id; 2050 2051 if (!il->txq) 2052 return; 2053 2054 /* Unmap DMA from host system and free skb's */ 2055 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2056 if (txq_id == il->cmd_queue) 2057 il_cmd_queue_unmap(il); 2058 else 2059 il_tx_queue_unmap(il, txq_id); 2060 } 2061 2062 /** 2063 * il4965_txq_ctx_stop - Stop all Tx DMA channels 2064 */ 2065 void 2066 il4965_txq_ctx_stop(struct il_priv *il) 2067 { 2068 int ch, ret; 2069 2070 _il_wr_prph(il, IL49_SCD_TXFACT, 0); 2071 2072 /* Stop each Tx DMA channel, and wait for it to be idle */ 2073 for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) { 2074 _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); 2075 ret = 2076 _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG, 2077 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 2078 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 2079 1000); 2080 if (ret < 0) 2081 IL_ERR("Timeout stopping DMA channel %d [0x%08x]", 2082 ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG)); 2083 } 2084 } 2085 2086 /* 2087 * Find first available (lowest unused) Tx Queue, mark it "active". 2088 * Called only when finding queue for aggregation. 2089 * Should never return anything < 7, because they should already 2090 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6) 2091 */ 2092 static int 2093 il4965_txq_ctx_activate_free(struct il_priv *il) 2094 { 2095 int txq_id; 2096 2097 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2098 if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk)) 2099 return txq_id; 2100 return -1; 2101 } 2102 2103 /** 2104 * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration 2105 */ 2106 static void 2107 il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id) 2108 { 2109 /* Simply stop the queue, but don't change any configuration; 2110 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */ 2111 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), 2112 (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | 2113 (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); 2114 } 2115 2116 /** 2117 * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue 2118 */ 2119 static int 2120 il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id) 2121 { 2122 u32 tbl_dw_addr; 2123 u32 tbl_dw; 2124 u16 scd_q2ratid; 2125 2126 scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK; 2127 2128 tbl_dw_addr = 2129 il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id); 2130 2131 tbl_dw = il_read_targ_mem(il, tbl_dw_addr); 2132 2133 if (txq_id & 0x1) 2134 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); 2135 else 2136 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); 2137 2138 il_write_targ_mem(il, tbl_dw_addr, tbl_dw); 2139 2140 return 0; 2141 } 2142 2143 /** 2144 * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue 2145 * 2146 * NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE, 2147 * i.e. it must be one of the higher queues used for aggregation 2148 */ 2149 static int 2150 il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id, 2151 int tid, u16 ssn_idx) 2152 { 2153 unsigned long flags; 2154 u16 ra_tid; 2155 int ret; 2156 2157 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || 2158 (IL49_FIRST_AMPDU_QUEUE + 2159 il->cfg->num_of_ampdu_queues <= txq_id)) { 2160 IL_WARN("queue number out of range: %d, must be %d to %d\n", 2161 txq_id, IL49_FIRST_AMPDU_QUEUE, 2162 IL49_FIRST_AMPDU_QUEUE + 2163 il->cfg->num_of_ampdu_queues - 1); 2164 return -EINVAL; 2165 } 2166 2167 ra_tid = BUILD_RAxTID(sta_id, tid); 2168 2169 /* Modify device's station table to Tx this TID */ 2170 ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid); 2171 if (ret) 2172 return ret; 2173 2174 spin_lock_irqsave(&il->lock, flags); 2175 2176 /* Stop this Tx queue before configuring it */ 2177 il4965_tx_queue_stop_scheduler(il, txq_id); 2178 2179 /* Map receiver-address / traffic-ID to this queue */ 2180 il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id); 2181 2182 /* Set this queue as a chain-building queue */ 2183 il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); 2184 2185 /* Place first TFD at idx corresponding to start sequence number. 2186 * Assumes that ssn_idx is valid (!= 0xFFF) */ 2187 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); 2188 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); 2189 il4965_set_wr_ptrs(il, txq_id, ssn_idx); 2190 2191 /* Set up Tx win size and frame limit for this queue */ 2192 il_write_targ_mem(il, 2193 il->scd_base_addr + 2194 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id), 2195 (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) 2196 & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); 2197 2198 il_write_targ_mem(il, 2199 il->scd_base_addr + 2200 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), 2201 (SCD_FRAME_LIMIT << 2202 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & 2203 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); 2204 2205 il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); 2206 2207 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */ 2208 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1); 2209 2210 spin_unlock_irqrestore(&il->lock, flags); 2211 2212 return 0; 2213 } 2214 2215 int 2216 il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif, 2217 struct ieee80211_sta *sta, u16 tid, u16 * ssn) 2218 { 2219 int sta_id; 2220 int tx_fifo; 2221 int txq_id; 2222 int ret; 2223 unsigned long flags; 2224 struct il_tid_data *tid_data; 2225 2226 /* FIXME: warning if tx fifo not found ? */ 2227 tx_fifo = il4965_get_fifo_from_tid(tid); 2228 if (unlikely(tx_fifo < 0)) 2229 return tx_fifo; 2230 2231 D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid); 2232 2233 sta_id = il_sta_id(sta); 2234 if (sta_id == IL_INVALID_STATION) { 2235 IL_ERR("Start AGG on invalid station\n"); 2236 return -ENXIO; 2237 } 2238 if (unlikely(tid >= MAX_TID_COUNT)) 2239 return -EINVAL; 2240 2241 if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) { 2242 IL_ERR("Start AGG when state is not IL_AGG_OFF !\n"); 2243 return -ENXIO; 2244 } 2245 2246 txq_id = il4965_txq_ctx_activate_free(il); 2247 if (txq_id == -1) { 2248 IL_ERR("No free aggregation queue available\n"); 2249 return -ENXIO; 2250 } 2251 2252 spin_lock_irqsave(&il->sta_lock, flags); 2253 tid_data = &il->stations[sta_id].tid[tid]; 2254 *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2255 tid_data->agg.txq_id = txq_id; 2256 il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id); 2257 spin_unlock_irqrestore(&il->sta_lock, flags); 2258 2259 ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn); 2260 if (ret) 2261 return ret; 2262 2263 spin_lock_irqsave(&il->sta_lock, flags); 2264 tid_data = &il->stations[sta_id].tid[tid]; 2265 if (tid_data->tfds_in_queue == 0) { 2266 D_HT("HW queue is empty\n"); 2267 tid_data->agg.state = IL_AGG_ON; 2268 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 2269 } else { 2270 D_HT("HW queue is NOT empty: %d packets in HW queue\n", 2271 tid_data->tfds_in_queue); 2272 tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA; 2273 } 2274 spin_unlock_irqrestore(&il->sta_lock, flags); 2275 return ret; 2276 } 2277 2278 /** 2279 * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE 2280 * il->lock must be held by the caller 2281 */ 2282 static int 2283 il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo) 2284 { 2285 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || 2286 (IL49_FIRST_AMPDU_QUEUE + 2287 il->cfg->num_of_ampdu_queues <= txq_id)) { 2288 IL_WARN("queue number out of range: %d, must be %d to %d\n", 2289 txq_id, IL49_FIRST_AMPDU_QUEUE, 2290 IL49_FIRST_AMPDU_QUEUE + 2291 il->cfg->num_of_ampdu_queues - 1); 2292 return -EINVAL; 2293 } 2294 2295 il4965_tx_queue_stop_scheduler(il, txq_id); 2296 2297 il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); 2298 2299 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); 2300 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); 2301 /* supposes that ssn_idx is valid (!= 0xFFF) */ 2302 il4965_set_wr_ptrs(il, txq_id, ssn_idx); 2303 2304 il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); 2305 il_txq_ctx_deactivate(il, txq_id); 2306 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0); 2307 2308 return 0; 2309 } 2310 2311 int 2312 il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif, 2313 struct ieee80211_sta *sta, u16 tid) 2314 { 2315 int tx_fifo_id, txq_id, sta_id, ssn; 2316 struct il_tid_data *tid_data; 2317 int write_ptr, read_ptr; 2318 unsigned long flags; 2319 2320 /* FIXME: warning if tx_fifo_id not found ? */ 2321 tx_fifo_id = il4965_get_fifo_from_tid(tid); 2322 if (unlikely(tx_fifo_id < 0)) 2323 return tx_fifo_id; 2324 2325 sta_id = il_sta_id(sta); 2326 2327 if (sta_id == IL_INVALID_STATION) { 2328 IL_ERR("Invalid station for AGG tid %d\n", tid); 2329 return -ENXIO; 2330 } 2331 2332 spin_lock_irqsave(&il->sta_lock, flags); 2333 2334 tid_data = &il->stations[sta_id].tid[tid]; 2335 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; 2336 txq_id = tid_data->agg.txq_id; 2337 2338 switch (il->stations[sta_id].tid[tid].agg.state) { 2339 case IL_EMPTYING_HW_QUEUE_ADDBA: 2340 /* 2341 * This can happen if the peer stops aggregation 2342 * again before we've had a chance to drain the 2343 * queue we selected previously, i.e. before the 2344 * session was really started completely. 2345 */ 2346 D_HT("AGG stop before setup done\n"); 2347 goto turn_off; 2348 case IL_AGG_ON: 2349 break; 2350 default: 2351 IL_WARN("Stopping AGG while state not ON or starting\n"); 2352 } 2353 2354 write_ptr = il->txq[txq_id].q.write_ptr; 2355 read_ptr = il->txq[txq_id].q.read_ptr; 2356 2357 /* The queue is not empty */ 2358 if (write_ptr != read_ptr) { 2359 D_HT("Stopping a non empty AGG HW QUEUE\n"); 2360 il->stations[sta_id].tid[tid].agg.state = 2361 IL_EMPTYING_HW_QUEUE_DELBA; 2362 spin_unlock_irqrestore(&il->sta_lock, flags); 2363 return 0; 2364 } 2365 2366 D_HT("HW queue is empty\n"); 2367 turn_off: 2368 il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF; 2369 2370 /* do not restore/save irqs */ 2371 spin_unlock(&il->sta_lock); 2372 spin_lock(&il->lock); 2373 2374 /* 2375 * the only reason this call can fail is queue number out of range, 2376 * which can happen if uCode is reloaded and all the station 2377 * information are lost. if it is outside the range, there is no need 2378 * to deactivate the uCode queue, just return "success" to allow 2379 * mac80211 to clean up it own data. 2380 */ 2381 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id); 2382 spin_unlock_irqrestore(&il->lock, flags); 2383 2384 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2385 2386 return 0; 2387 } 2388 2389 int 2390 il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id) 2391 { 2392 struct il_queue *q = &il->txq[txq_id].q; 2393 u8 *addr = il->stations[sta_id].sta.sta.addr; 2394 struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid]; 2395 2396 lockdep_assert_held(&il->sta_lock); 2397 2398 switch (il->stations[sta_id].tid[tid].agg.state) { 2399 case IL_EMPTYING_HW_QUEUE_DELBA: 2400 /* We are reclaiming the last packet of the */ 2401 /* aggregated HW queue */ 2402 if (txq_id == tid_data->agg.txq_id && 2403 q->read_ptr == q->write_ptr) { 2404 u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2405 int tx_fifo = il4965_get_fifo_from_tid(tid); 2406 D_HT("HW queue empty: continue DELBA flow\n"); 2407 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo); 2408 tid_data->agg.state = IL_AGG_OFF; 2409 ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid); 2410 } 2411 break; 2412 case IL_EMPTYING_HW_QUEUE_ADDBA: 2413 /* We are reclaiming the last packet of the queue */ 2414 if (tid_data->tfds_in_queue == 0) { 2415 D_HT("HW queue empty: continue ADDBA flow\n"); 2416 tid_data->agg.state = IL_AGG_ON; 2417 ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid); 2418 } 2419 break; 2420 } 2421 2422 return 0; 2423 } 2424 2425 static void 2426 il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1) 2427 { 2428 struct ieee80211_sta *sta; 2429 struct il_station_priv *sta_priv; 2430 2431 rcu_read_lock(); 2432 sta = ieee80211_find_sta(il->vif, addr1); 2433 if (sta) { 2434 sta_priv = (void *)sta->drv_priv; 2435 /* avoid atomic ops if this isn't a client */ 2436 if (sta_priv->client && 2437 atomic_dec_return(&sta_priv->pending_frames) == 0) 2438 ieee80211_sta_block_awake(il->hw, sta, false); 2439 } 2440 rcu_read_unlock(); 2441 } 2442 2443 static void 2444 il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg) 2445 { 2446 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 2447 2448 if (!is_agg) 2449 il4965_non_agg_tx_status(il, hdr->addr1); 2450 2451 ieee80211_tx_status_irqsafe(il->hw, skb); 2452 } 2453 2454 int 2455 il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx) 2456 { 2457 struct il_tx_queue *txq = &il->txq[txq_id]; 2458 struct il_queue *q = &txq->q; 2459 int nfreed = 0; 2460 struct ieee80211_hdr *hdr; 2461 struct sk_buff *skb; 2462 2463 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) { 2464 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, " 2465 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd, 2466 q->write_ptr, q->read_ptr); 2467 return 0; 2468 } 2469 2470 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx; 2471 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) { 2472 2473 skb = txq->skbs[txq->q.read_ptr]; 2474 2475 if (WARN_ON_ONCE(skb == NULL)) 2476 continue; 2477 2478 hdr = (struct ieee80211_hdr *) skb->data; 2479 if (ieee80211_is_data_qos(hdr->frame_control)) 2480 nfreed++; 2481 2482 il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE); 2483 2484 txq->skbs[txq->q.read_ptr] = NULL; 2485 il->ops->txq_free_tfd(il, txq); 2486 } 2487 return nfreed; 2488 } 2489 2490 /** 2491 * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack 2492 * 2493 * Go through block-ack's bitmap of ACK'd frames, update driver's record of 2494 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo. 2495 */ 2496 static int 2497 il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg, 2498 struct il_compressed_ba_resp *ba_resp) 2499 { 2500 int i, sh, ack; 2501 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl); 2502 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 2503 int successes = 0; 2504 struct ieee80211_tx_info *info; 2505 u64 bitmap, sent_bitmap; 2506 2507 if (unlikely(!agg->wait_for_ba)) { 2508 if (unlikely(ba_resp->bitmap)) 2509 IL_ERR("Received BA when not expected\n"); 2510 return -EINVAL; 2511 } 2512 2513 /* Mark that the expected block-ack response arrived */ 2514 agg->wait_for_ba = 0; 2515 D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl); 2516 2517 /* Calculate shift to align block-ack bits with our Tx win bits */ 2518 sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4); 2519 if (sh < 0) /* tbw something is wrong with indices */ 2520 sh += 0x100; 2521 2522 if (agg->frame_count > (64 - sh)) { 2523 D_TX_REPLY("more frames than bitmap size"); 2524 return -1; 2525 } 2526 2527 /* don't use 64-bit values for now */ 2528 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh; 2529 2530 /* check for success or failure according to the 2531 * transmitted bitmap and block-ack bitmap */ 2532 sent_bitmap = bitmap & agg->bitmap; 2533 2534 /* For each frame attempted in aggregation, 2535 * update driver's record of tx frame's status. */ 2536 i = 0; 2537 while (sent_bitmap) { 2538 ack = sent_bitmap & 1ULL; 2539 successes += ack; 2540 D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK", 2541 i, (agg->start_idx + i) & 0xff, agg->start_idx + i); 2542 sent_bitmap >>= 1; 2543 ++i; 2544 } 2545 2546 D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap); 2547 2548 info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]); 2549 memset(&info->status, 0, sizeof(info->status)); 2550 info->flags |= IEEE80211_TX_STAT_ACK; 2551 info->flags |= IEEE80211_TX_STAT_AMPDU; 2552 info->status.ampdu_ack_len = successes; 2553 info->status.ampdu_len = agg->frame_count; 2554 il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info); 2555 2556 return 0; 2557 } 2558 2559 static inline bool 2560 il4965_is_tx_success(u32 status) 2561 { 2562 status &= TX_STATUS_MSK; 2563 return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE); 2564 } 2565 2566 static u8 2567 il4965_find_station(struct il_priv *il, const u8 *addr) 2568 { 2569 int i; 2570 int start = 0; 2571 int ret = IL_INVALID_STATION; 2572 unsigned long flags; 2573 2574 if (il->iw_mode == NL80211_IFTYPE_ADHOC) 2575 start = IL_STA_ID; 2576 2577 if (is_broadcast_ether_addr(addr)) 2578 return il->hw_params.bcast_id; 2579 2580 spin_lock_irqsave(&il->sta_lock, flags); 2581 for (i = start; i < il->hw_params.max_stations; i++) 2582 if (il->stations[i].used && 2583 ether_addr_equal(il->stations[i].sta.sta.addr, addr)) { 2584 ret = i; 2585 goto out; 2586 } 2587 2588 D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations); 2589 2590 out: 2591 /* 2592 * It may be possible that more commands interacting with stations 2593 * arrive before we completed processing the adding of 2594 * station 2595 */ 2596 if (ret != IL_INVALID_STATION && 2597 (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) || 2598 ((il->stations[ret].used & IL_STA_UCODE_ACTIVE) && 2599 (il->stations[ret].used & IL_STA_UCODE_INPROGRESS)))) { 2600 IL_ERR("Requested station info for sta %d before ready.\n", 2601 ret); 2602 ret = IL_INVALID_STATION; 2603 } 2604 spin_unlock_irqrestore(&il->sta_lock, flags); 2605 return ret; 2606 } 2607 2608 static int 2609 il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr) 2610 { 2611 if (il->iw_mode == NL80211_IFTYPE_STATION) 2612 return IL_AP_ID; 2613 else { 2614 u8 *da = ieee80211_get_DA(hdr); 2615 2616 return il4965_find_station(il, da); 2617 } 2618 } 2619 2620 static inline u32 2621 il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp) 2622 { 2623 return le32_to_cpup(&tx_resp->u.status + 2624 tx_resp->frame_count) & IEEE80211_MAX_SN; 2625 } 2626 2627 static inline u32 2628 il4965_tx_status_to_mac80211(u32 status) 2629 { 2630 status &= TX_STATUS_MSK; 2631 2632 switch (status) { 2633 case TX_STATUS_SUCCESS: 2634 case TX_STATUS_DIRECT_DONE: 2635 return IEEE80211_TX_STAT_ACK; 2636 case TX_STATUS_FAIL_DEST_PS: 2637 return IEEE80211_TX_STAT_TX_FILTERED; 2638 default: 2639 return 0; 2640 } 2641 } 2642 2643 /** 2644 * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue 2645 */ 2646 static int 2647 il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg, 2648 struct il4965_tx_resp *tx_resp, int txq_id, 2649 u16 start_idx) 2650 { 2651 u16 status; 2652 struct agg_tx_status *frame_status = tx_resp->u.agg_status; 2653 struct ieee80211_tx_info *info = NULL; 2654 struct ieee80211_hdr *hdr = NULL; 2655 u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); 2656 int i, sh, idx; 2657 u16 seq; 2658 if (agg->wait_for_ba) 2659 D_TX_REPLY("got tx response w/o block-ack\n"); 2660 2661 agg->frame_count = tx_resp->frame_count; 2662 agg->start_idx = start_idx; 2663 agg->rate_n_flags = rate_n_flags; 2664 agg->bitmap = 0; 2665 2666 /* num frames attempted by Tx command */ 2667 if (agg->frame_count == 1) { 2668 /* Only one frame was attempted; no block-ack will arrive */ 2669 status = le16_to_cpu(frame_status[0].status); 2670 idx = start_idx; 2671 2672 D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n", 2673 agg->frame_count, agg->start_idx, idx); 2674 2675 info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]); 2676 info->status.rates[0].count = tx_resp->failure_frame + 1; 2677 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 2678 info->flags |= il4965_tx_status_to_mac80211(status); 2679 il4965_hwrate_to_tx_control(il, rate_n_flags, info); 2680 2681 D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff, 2682 tx_resp->failure_frame); 2683 D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags); 2684 2685 agg->wait_for_ba = 0; 2686 } else { 2687 /* Two or more frames were attempted; expect block-ack */ 2688 u64 bitmap = 0; 2689 int start = agg->start_idx; 2690 struct sk_buff *skb; 2691 2692 /* Construct bit-map of pending frames within Tx win */ 2693 for (i = 0; i < agg->frame_count; i++) { 2694 u16 sc; 2695 status = le16_to_cpu(frame_status[i].status); 2696 seq = le16_to_cpu(frame_status[i].sequence); 2697 idx = SEQ_TO_IDX(seq); 2698 txq_id = SEQ_TO_QUEUE(seq); 2699 2700 if (status & 2701 (AGG_TX_STATE_FEW_BYTES_MSK | 2702 AGG_TX_STATE_ABORT_MSK)) 2703 continue; 2704 2705 D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n", 2706 agg->frame_count, txq_id, idx); 2707 2708 skb = il->txq[txq_id].skbs[idx]; 2709 if (WARN_ON_ONCE(skb == NULL)) 2710 return -1; 2711 hdr = (struct ieee80211_hdr *) skb->data; 2712 2713 sc = le16_to_cpu(hdr->seq_ctrl); 2714 if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) { 2715 IL_ERR("BUG_ON idx doesn't match seq control" 2716 " idx=%d, seq_idx=%d, seq=%d\n", idx, 2717 IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl); 2718 return -1; 2719 } 2720 2721 D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx, 2722 IEEE80211_SEQ_TO_SN(sc)); 2723 2724 sh = idx - start; 2725 if (sh > 64) { 2726 sh = (start - idx) + 0xff; 2727 bitmap = bitmap << sh; 2728 sh = 0; 2729 start = idx; 2730 } else if (sh < -64) 2731 sh = 0xff - (start - idx); 2732 else if (sh < 0) { 2733 sh = start - idx; 2734 start = idx; 2735 bitmap = bitmap << sh; 2736 sh = 0; 2737 } 2738 bitmap |= 1ULL << sh; 2739 D_TX_REPLY("start=%d bitmap=0x%llx\n", start, 2740 (unsigned long long)bitmap); 2741 } 2742 2743 agg->bitmap = bitmap; 2744 agg->start_idx = start; 2745 D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n", 2746 agg->frame_count, agg->start_idx, 2747 (unsigned long long)agg->bitmap); 2748 2749 if (bitmap) 2750 agg->wait_for_ba = 1; 2751 } 2752 return 0; 2753 } 2754 2755 /** 2756 * il4965_hdl_tx - Handle standard (non-aggregation) Tx response 2757 */ 2758 static void 2759 il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb) 2760 { 2761 struct il_rx_pkt *pkt = rxb_addr(rxb); 2762 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 2763 int txq_id = SEQ_TO_QUEUE(sequence); 2764 int idx = SEQ_TO_IDX(sequence); 2765 struct il_tx_queue *txq = &il->txq[txq_id]; 2766 struct sk_buff *skb; 2767 struct ieee80211_hdr *hdr; 2768 struct ieee80211_tx_info *info; 2769 struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; 2770 u32 status = le32_to_cpu(tx_resp->u.status); 2771 int uninitialized_var(tid); 2772 int sta_id; 2773 int freed; 2774 u8 *qc = NULL; 2775 unsigned long flags; 2776 2777 if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) { 2778 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d " 2779 "is out of range [0-%d] %d %d\n", txq_id, idx, 2780 txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr); 2781 return; 2782 } 2783 2784 txq->time_stamp = jiffies; 2785 2786 skb = txq->skbs[txq->q.read_ptr]; 2787 info = IEEE80211_SKB_CB(skb); 2788 memset(&info->status, 0, sizeof(info->status)); 2789 2790 hdr = (struct ieee80211_hdr *) skb->data; 2791 if (ieee80211_is_data_qos(hdr->frame_control)) { 2792 qc = ieee80211_get_qos_ctl(hdr); 2793 tid = qc[0] & 0xf; 2794 } 2795 2796 sta_id = il4965_get_ra_sta_id(il, hdr); 2797 if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) { 2798 IL_ERR("Station not known\n"); 2799 return; 2800 } 2801 2802 /* 2803 * Firmware will not transmit frame on passive channel, if it not yet 2804 * received some valid frame on that channel. When this error happen 2805 * we have to wait until firmware will unblock itself i.e. when we 2806 * note received beacon or other frame. We unblock queues in 2807 * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed. 2808 */ 2809 if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) && 2810 il->iw_mode == NL80211_IFTYPE_STATION) { 2811 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE); 2812 D_INFO("Stopped queues - RX waiting on passive channel\n"); 2813 } 2814 2815 spin_lock_irqsave(&il->sta_lock, flags); 2816 if (txq->sched_retry) { 2817 const u32 scd_ssn = il4965_get_scd_ssn(tx_resp); 2818 struct il_ht_agg *agg = NULL; 2819 WARN_ON(!qc); 2820 2821 agg = &il->stations[sta_id].tid[tid].agg; 2822 2823 il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx); 2824 2825 /* check if BAR is needed */ 2826 if (tx_resp->frame_count == 1 && 2827 !il4965_is_tx_success(status)) 2828 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 2829 2830 if (txq->q.read_ptr != (scd_ssn & 0xff)) { 2831 idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd); 2832 D_TX_REPLY("Retry scheduler reclaim scd_ssn " 2833 "%d idx %d\n", scd_ssn, idx); 2834 freed = il4965_tx_queue_reclaim(il, txq_id, idx); 2835 if (qc) 2836 il4965_free_tfds_in_queue(il, sta_id, tid, 2837 freed); 2838 2839 if (il->mac80211_registered && 2840 il_queue_space(&txq->q) > txq->q.low_mark && 2841 agg->state != IL_EMPTYING_HW_QUEUE_DELBA) 2842 il_wake_queue(il, txq); 2843 } 2844 } else { 2845 info->status.rates[0].count = tx_resp->failure_frame + 1; 2846 info->flags |= il4965_tx_status_to_mac80211(status); 2847 il4965_hwrate_to_tx_control(il, 2848 le32_to_cpu(tx_resp->rate_n_flags), 2849 info); 2850 2851 D_TX_REPLY("TXQ %d status %s (0x%08x) " 2852 "rate_n_flags 0x%x retries %d\n", txq_id, 2853 il4965_get_tx_fail_reason(status), status, 2854 le32_to_cpu(tx_resp->rate_n_flags), 2855 tx_resp->failure_frame); 2856 2857 freed = il4965_tx_queue_reclaim(il, txq_id, idx); 2858 if (qc && likely(sta_id != IL_INVALID_STATION)) 2859 il4965_free_tfds_in_queue(il, sta_id, tid, freed); 2860 else if (sta_id == IL_INVALID_STATION) 2861 D_TX_REPLY("Station not known\n"); 2862 2863 if (il->mac80211_registered && 2864 il_queue_space(&txq->q) > txq->q.low_mark) 2865 il_wake_queue(il, txq); 2866 } 2867 if (qc && likely(sta_id != IL_INVALID_STATION)) 2868 il4965_txq_check_empty(il, sta_id, tid, txq_id); 2869 2870 il4965_check_abort_status(il, tx_resp->frame_count, status); 2871 2872 spin_unlock_irqrestore(&il->sta_lock, flags); 2873 } 2874 2875 /** 2876 * translate ucode response to mac80211 tx status control values 2877 */ 2878 void 2879 il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags, 2880 struct ieee80211_tx_info *info) 2881 { 2882 struct ieee80211_tx_rate *r = &info->status.rates[0]; 2883 2884 info->status.antenna = 2885 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 2886 if (rate_n_flags & RATE_MCS_HT_MSK) 2887 r->flags |= IEEE80211_TX_RC_MCS; 2888 if (rate_n_flags & RATE_MCS_GF_MSK) 2889 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 2890 if (rate_n_flags & RATE_MCS_HT40_MSK) 2891 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 2892 if (rate_n_flags & RATE_MCS_DUP_MSK) 2893 r->flags |= IEEE80211_TX_RC_DUP_DATA; 2894 if (rate_n_flags & RATE_MCS_SGI_MSK) 2895 r->flags |= IEEE80211_TX_RC_SHORT_GI; 2896 r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band); 2897 } 2898 2899 /** 2900 * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA 2901 * 2902 * Handles block-acknowledge notification from device, which reports success 2903 * of frames sent via aggregation. 2904 */ 2905 static void 2906 il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb) 2907 { 2908 struct il_rx_pkt *pkt = rxb_addr(rxb); 2909 struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; 2910 struct il_tx_queue *txq = NULL; 2911 struct il_ht_agg *agg; 2912 int idx; 2913 int sta_id; 2914 int tid; 2915 unsigned long flags; 2916 2917 /* "flow" corresponds to Tx queue */ 2918 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 2919 2920 /* "ssn" is start of block-ack Tx win, corresponds to idx 2921 * (in Tx queue's circular buffer) of first TFD/frame in win */ 2922 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); 2923 2924 if (scd_flow >= il->hw_params.max_txq_num) { 2925 IL_ERR("BUG_ON scd_flow is bigger than number of queues\n"); 2926 return; 2927 } 2928 2929 txq = &il->txq[scd_flow]; 2930 sta_id = ba_resp->sta_id; 2931 tid = ba_resp->tid; 2932 agg = &il->stations[sta_id].tid[tid].agg; 2933 if (unlikely(agg->txq_id != scd_flow)) { 2934 /* 2935 * FIXME: this is a uCode bug which need to be addressed, 2936 * log the information and return for now! 2937 * since it is possible happen very often and in order 2938 * not to fill the syslog, don't enable the logging by default 2939 */ 2940 D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n", 2941 scd_flow, agg->txq_id); 2942 return; 2943 } 2944 2945 /* Find idx just before block-ack win */ 2946 idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); 2947 2948 spin_lock_irqsave(&il->sta_lock, flags); 2949 2950 D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n", 2951 agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32, 2952 ba_resp->sta_id); 2953 D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = " 2954 "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl, 2955 (unsigned long long)le64_to_cpu(ba_resp->bitmap), 2956 ba_resp->scd_flow, ba_resp->scd_ssn); 2957 D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx, 2958 (unsigned long long)agg->bitmap); 2959 2960 /* Update driver's record of ACK vs. not for each frame in win */ 2961 il4965_tx_status_reply_compressed_ba(il, agg, ba_resp); 2962 2963 /* Release all TFDs before the SSN, i.e. all TFDs in front of 2964 * block-ack win (we assume that they've been successfully 2965 * transmitted ... if not, it's too late anyway). */ 2966 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) { 2967 /* calculate mac80211 ampdu sw queue to wake */ 2968 int freed = il4965_tx_queue_reclaim(il, scd_flow, idx); 2969 il4965_free_tfds_in_queue(il, sta_id, tid, freed); 2970 2971 if (il_queue_space(&txq->q) > txq->q.low_mark && 2972 il->mac80211_registered && 2973 agg->state != IL_EMPTYING_HW_QUEUE_DELBA) 2974 il_wake_queue(il, txq); 2975 2976 il4965_txq_check_empty(il, sta_id, tid, scd_flow); 2977 } 2978 2979 spin_unlock_irqrestore(&il->sta_lock, flags); 2980 } 2981 2982 #ifdef CONFIG_IWLEGACY_DEBUG 2983 const char * 2984 il4965_get_tx_fail_reason(u32 status) 2985 { 2986 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 2987 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 2988 2989 switch (status & TX_STATUS_MSK) { 2990 case TX_STATUS_SUCCESS: 2991 return "SUCCESS"; 2992 TX_STATUS_POSTPONE(DELAY); 2993 TX_STATUS_POSTPONE(FEW_BYTES); 2994 TX_STATUS_POSTPONE(QUIET_PERIOD); 2995 TX_STATUS_POSTPONE(CALC_TTAK); 2996 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 2997 TX_STATUS_FAIL(SHORT_LIMIT); 2998 TX_STATUS_FAIL(LONG_LIMIT); 2999 TX_STATUS_FAIL(FIFO_UNDERRUN); 3000 TX_STATUS_FAIL(DRAIN_FLOW); 3001 TX_STATUS_FAIL(RFKILL_FLUSH); 3002 TX_STATUS_FAIL(LIFE_EXPIRE); 3003 TX_STATUS_FAIL(DEST_PS); 3004 TX_STATUS_FAIL(HOST_ABORTED); 3005 TX_STATUS_FAIL(BT_RETRY); 3006 TX_STATUS_FAIL(STA_INVALID); 3007 TX_STATUS_FAIL(FRAG_DROPPED); 3008 TX_STATUS_FAIL(TID_DISABLE); 3009 TX_STATUS_FAIL(FIFO_FLUSHED); 3010 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); 3011 TX_STATUS_FAIL(PASSIVE_NO_RX); 3012 TX_STATUS_FAIL(NO_BEACON_ON_RADAR); 3013 } 3014 3015 return "UNKNOWN"; 3016 3017 #undef TX_STATUS_FAIL 3018 #undef TX_STATUS_POSTPONE 3019 } 3020 #endif /* CONFIG_IWLEGACY_DEBUG */ 3021 3022 static struct il_link_quality_cmd * 3023 il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id) 3024 { 3025 int i, r; 3026 struct il_link_quality_cmd *link_cmd; 3027 u32 rate_flags = 0; 3028 __le32 rate_n_flags; 3029 3030 link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL); 3031 if (!link_cmd) { 3032 IL_ERR("Unable to allocate memory for LQ cmd.\n"); 3033 return NULL; 3034 } 3035 /* Set up the rate scaling to start at selected rate, fall back 3036 * all the way down to 1M in IEEE order, and then spin on 1M */ 3037 if (il->band == NL80211_BAND_5GHZ) 3038 r = RATE_6M_IDX; 3039 else 3040 r = RATE_1M_IDX; 3041 3042 if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE) 3043 rate_flags |= RATE_MCS_CCK_MSK; 3044 3045 rate_flags |= 3046 il4965_first_antenna(il->hw_params. 3047 valid_tx_ant) << RATE_MCS_ANT_POS; 3048 rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags); 3049 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) 3050 link_cmd->rs_table[i].rate_n_flags = rate_n_flags; 3051 3052 link_cmd->general_params.single_stream_ant_msk = 3053 il4965_first_antenna(il->hw_params.valid_tx_ant); 3054 3055 link_cmd->general_params.dual_stream_ant_msk = 3056 il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params. 3057 valid_tx_ant); 3058 if (!link_cmd->general_params.dual_stream_ant_msk) { 3059 link_cmd->general_params.dual_stream_ant_msk = ANT_AB; 3060 } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) { 3061 link_cmd->general_params.dual_stream_ant_msk = 3062 il->hw_params.valid_tx_ant; 3063 } 3064 3065 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; 3066 link_cmd->agg_params.agg_time_limit = 3067 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); 3068 3069 link_cmd->sta_id = sta_id; 3070 3071 return link_cmd; 3072 } 3073 3074 /* 3075 * il4965_add_bssid_station - Add the special IBSS BSSID station 3076 * 3077 * Function sleeps. 3078 */ 3079 int 3080 il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r) 3081 { 3082 int ret; 3083 u8 sta_id; 3084 struct il_link_quality_cmd *link_cmd; 3085 unsigned long flags; 3086 3087 if (sta_id_r) 3088 *sta_id_r = IL_INVALID_STATION; 3089 3090 ret = il_add_station_common(il, addr, 0, NULL, &sta_id); 3091 if (ret) { 3092 IL_ERR("Unable to add station %pM\n", addr); 3093 return ret; 3094 } 3095 3096 if (sta_id_r) 3097 *sta_id_r = sta_id; 3098 3099 spin_lock_irqsave(&il->sta_lock, flags); 3100 il->stations[sta_id].used |= IL_STA_LOCAL; 3101 spin_unlock_irqrestore(&il->sta_lock, flags); 3102 3103 /* Set up default rate scaling table in device's station table */ 3104 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3105 if (!link_cmd) { 3106 IL_ERR("Unable to initialize rate scaling for station %pM.\n", 3107 addr); 3108 return -ENOMEM; 3109 } 3110 3111 ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true); 3112 if (ret) 3113 IL_ERR("Link quality command failed (%d)\n", ret); 3114 3115 spin_lock_irqsave(&il->sta_lock, flags); 3116 il->stations[sta_id].lq = link_cmd; 3117 spin_unlock_irqrestore(&il->sta_lock, flags); 3118 3119 return 0; 3120 } 3121 3122 static int 3123 il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty) 3124 { 3125 int i; 3126 u8 buff[sizeof(struct il_wep_cmd) + 3127 sizeof(struct il_wep_key) * WEP_KEYS_MAX]; 3128 struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff; 3129 size_t cmd_size = sizeof(struct il_wep_cmd); 3130 struct il_host_cmd cmd = { 3131 .id = C_WEPKEY, 3132 .data = wep_cmd, 3133 .flags = CMD_SYNC, 3134 }; 3135 bool not_empty = false; 3136 3137 might_sleep(); 3138 3139 memset(wep_cmd, 0, 3140 cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX)); 3141 3142 for (i = 0; i < WEP_KEYS_MAX; i++) { 3143 u8 key_size = il->_4965.wep_keys[i].key_size; 3144 3145 wep_cmd->key[i].key_idx = i; 3146 if (key_size) { 3147 wep_cmd->key[i].key_offset = i; 3148 not_empty = true; 3149 } else 3150 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET; 3151 3152 wep_cmd->key[i].key_size = key_size; 3153 memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size); 3154 } 3155 3156 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE; 3157 wep_cmd->num_keys = WEP_KEYS_MAX; 3158 3159 cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX; 3160 cmd.len = cmd_size; 3161 3162 if (not_empty || send_if_empty) 3163 return il_send_cmd(il, &cmd); 3164 else 3165 return 0; 3166 } 3167 3168 int 3169 il4965_restore_default_wep_keys(struct il_priv *il) 3170 { 3171 lockdep_assert_held(&il->mutex); 3172 3173 return il4965_static_wepkey_cmd(il, false); 3174 } 3175 3176 int 3177 il4965_remove_default_wep_key(struct il_priv *il, 3178 struct ieee80211_key_conf *keyconf) 3179 { 3180 int ret; 3181 int idx = keyconf->keyidx; 3182 3183 lockdep_assert_held(&il->mutex); 3184 3185 D_WEP("Removing default WEP key: idx=%d\n", idx); 3186 3187 memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key)); 3188 if (il_is_rfkill(il)) { 3189 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n"); 3190 /* but keys in device are clear anyway so return success */ 3191 return 0; 3192 } 3193 ret = il4965_static_wepkey_cmd(il, 1); 3194 D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret); 3195 3196 return ret; 3197 } 3198 3199 int 3200 il4965_set_default_wep_key(struct il_priv *il, 3201 struct ieee80211_key_conf *keyconf) 3202 { 3203 int ret; 3204 int len = keyconf->keylen; 3205 int idx = keyconf->keyidx; 3206 3207 lockdep_assert_held(&il->mutex); 3208 3209 if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) { 3210 D_WEP("Bad WEP key length %d\n", keyconf->keylen); 3211 return -EINVAL; 3212 } 3213 3214 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; 3215 keyconf->hw_key_idx = HW_KEY_DEFAULT; 3216 il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher; 3217 3218 il->_4965.wep_keys[idx].key_size = len; 3219 memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len); 3220 3221 ret = il4965_static_wepkey_cmd(il, false); 3222 3223 D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret); 3224 return ret; 3225 } 3226 3227 static int 3228 il4965_set_wep_dynamic_key_info(struct il_priv *il, 3229 struct ieee80211_key_conf *keyconf, u8 sta_id) 3230 { 3231 unsigned long flags; 3232 __le16 key_flags = 0; 3233 struct il_addsta_cmd sta_cmd; 3234 3235 lockdep_assert_held(&il->mutex); 3236 3237 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; 3238 3239 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK); 3240 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3241 key_flags &= ~STA_KEY_FLG_INVALID; 3242 3243 if (keyconf->keylen == WEP_KEY_LEN_128) 3244 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK; 3245 3246 if (sta_id == il->hw_params.bcast_id) 3247 key_flags |= STA_KEY_MULTICAST_MSK; 3248 3249 spin_lock_irqsave(&il->sta_lock, flags); 3250 3251 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3252 il->stations[sta_id].keyinfo.keylen = keyconf->keylen; 3253 il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx; 3254 3255 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); 3256 3257 memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key, 3258 keyconf->keylen); 3259 3260 if ((il->stations[sta_id].sta.key. 3261 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3262 il->stations[sta_id].sta.key.key_offset = 3263 il_get_free_ucode_key_idx(il); 3264 /* else, we are overriding an existing key => no need to allocated room 3265 * in uCode. */ 3266 3267 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3268 "no space for a new key"); 3269 3270 il->stations[sta_id].sta.key.key_flags = key_flags; 3271 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3272 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3273 3274 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3275 sizeof(struct il_addsta_cmd)); 3276 spin_unlock_irqrestore(&il->sta_lock, flags); 3277 3278 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3279 } 3280 3281 static int 3282 il4965_set_ccmp_dynamic_key_info(struct il_priv *il, 3283 struct ieee80211_key_conf *keyconf, u8 sta_id) 3284 { 3285 unsigned long flags; 3286 __le16 key_flags = 0; 3287 struct il_addsta_cmd sta_cmd; 3288 3289 lockdep_assert_held(&il->mutex); 3290 3291 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK); 3292 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3293 key_flags &= ~STA_KEY_FLG_INVALID; 3294 3295 if (sta_id == il->hw_params.bcast_id) 3296 key_flags |= STA_KEY_MULTICAST_MSK; 3297 3298 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 3299 3300 spin_lock_irqsave(&il->sta_lock, flags); 3301 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3302 il->stations[sta_id].keyinfo.keylen = keyconf->keylen; 3303 3304 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); 3305 3306 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen); 3307 3308 if ((il->stations[sta_id].sta.key. 3309 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3310 il->stations[sta_id].sta.key.key_offset = 3311 il_get_free_ucode_key_idx(il); 3312 /* else, we are overriding an existing key => no need to allocated room 3313 * in uCode. */ 3314 3315 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3316 "no space for a new key"); 3317 3318 il->stations[sta_id].sta.key.key_flags = key_flags; 3319 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3320 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3321 3322 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3323 sizeof(struct il_addsta_cmd)); 3324 spin_unlock_irqrestore(&il->sta_lock, flags); 3325 3326 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3327 } 3328 3329 static int 3330 il4965_set_tkip_dynamic_key_info(struct il_priv *il, 3331 struct ieee80211_key_conf *keyconf, u8 sta_id) 3332 { 3333 unsigned long flags; 3334 __le16 key_flags = 0; 3335 3336 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK); 3337 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3338 key_flags &= ~STA_KEY_FLG_INVALID; 3339 3340 if (sta_id == il->hw_params.bcast_id) 3341 key_flags |= STA_KEY_MULTICAST_MSK; 3342 3343 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 3344 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 3345 3346 spin_lock_irqsave(&il->sta_lock, flags); 3347 3348 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3349 il->stations[sta_id].keyinfo.keylen = 16; 3350 3351 if ((il->stations[sta_id].sta.key. 3352 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3353 il->stations[sta_id].sta.key.key_offset = 3354 il_get_free_ucode_key_idx(il); 3355 /* else, we are overriding an existing key => no need to allocated room 3356 * in uCode. */ 3357 3358 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3359 "no space for a new key"); 3360 3361 il->stations[sta_id].sta.key.key_flags = key_flags; 3362 3363 /* This copy is acutally not needed: we get the key with each TX */ 3364 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16); 3365 3366 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16); 3367 3368 spin_unlock_irqrestore(&il->sta_lock, flags); 3369 3370 return 0; 3371 } 3372 3373 void 3374 il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, 3375 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) 3376 { 3377 u8 sta_id; 3378 unsigned long flags; 3379 int i; 3380 3381 if (il_scan_cancel(il)) { 3382 /* cancel scan failed, just live w/ bad key and rely 3383 briefly on SW decryption */ 3384 return; 3385 } 3386 3387 sta_id = il_sta_id_or_broadcast(il, sta); 3388 if (sta_id == IL_INVALID_STATION) 3389 return; 3390 3391 spin_lock_irqsave(&il->sta_lock, flags); 3392 3393 il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32; 3394 3395 for (i = 0; i < 5; i++) 3396 il->stations[sta_id].sta.key.tkip_rx_ttak[i] = 3397 cpu_to_le16(phase1key[i]); 3398 3399 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3400 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3401 3402 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); 3403 3404 spin_unlock_irqrestore(&il->sta_lock, flags); 3405 } 3406 3407 int 3408 il4965_remove_dynamic_key(struct il_priv *il, 3409 struct ieee80211_key_conf *keyconf, u8 sta_id) 3410 { 3411 unsigned long flags; 3412 u16 key_flags; 3413 u8 keyidx; 3414 struct il_addsta_cmd sta_cmd; 3415 3416 lockdep_assert_held(&il->mutex); 3417 3418 il->_4965.key_mapping_keys--; 3419 3420 spin_lock_irqsave(&il->sta_lock, flags); 3421 key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags); 3422 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3; 3423 3424 D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id); 3425 3426 if (keyconf->keyidx != keyidx) { 3427 /* We need to remove a key with idx different that the one 3428 * in the uCode. This means that the key we need to remove has 3429 * been replaced by another one with different idx. 3430 * Don't do anything and return ok 3431 */ 3432 spin_unlock_irqrestore(&il->sta_lock, flags); 3433 return 0; 3434 } 3435 3436 if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) { 3437 IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx, 3438 key_flags); 3439 spin_unlock_irqrestore(&il->sta_lock, flags); 3440 return 0; 3441 } 3442 3443 if (!test_and_clear_bit 3444 (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table)) 3445 IL_ERR("idx %d not used in uCode key table.\n", 3446 il->stations[sta_id].sta.key.key_offset); 3447 memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key)); 3448 memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo)); 3449 il->stations[sta_id].sta.key.key_flags = 3450 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID; 3451 il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx; 3452 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3453 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3454 3455 if (il_is_rfkill(il)) { 3456 D_WEP 3457 ("Not sending C_ADD_STA command because RFKILL enabled.\n"); 3458 spin_unlock_irqrestore(&il->sta_lock, flags); 3459 return 0; 3460 } 3461 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3462 sizeof(struct il_addsta_cmd)); 3463 spin_unlock_irqrestore(&il->sta_lock, flags); 3464 3465 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3466 } 3467 3468 int 3469 il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, 3470 u8 sta_id) 3471 { 3472 int ret; 3473 3474 lockdep_assert_held(&il->mutex); 3475 3476 il->_4965.key_mapping_keys++; 3477 keyconf->hw_key_idx = HW_KEY_DYNAMIC; 3478 3479 switch (keyconf->cipher) { 3480 case WLAN_CIPHER_SUITE_CCMP: 3481 ret = 3482 il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id); 3483 break; 3484 case WLAN_CIPHER_SUITE_TKIP: 3485 ret = 3486 il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id); 3487 break; 3488 case WLAN_CIPHER_SUITE_WEP40: 3489 case WLAN_CIPHER_SUITE_WEP104: 3490 ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id); 3491 break; 3492 default: 3493 IL_ERR("Unknown alg: %s cipher = %x\n", __func__, 3494 keyconf->cipher); 3495 ret = -EINVAL; 3496 } 3497 3498 D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n", 3499 keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret); 3500 3501 return ret; 3502 } 3503 3504 /** 3505 * il4965_alloc_bcast_station - add broadcast station into driver's station table. 3506 * 3507 * This adds the broadcast station into the driver's station table 3508 * and marks it driver active, so that it will be restored to the 3509 * device at the next best time. 3510 */ 3511 int 3512 il4965_alloc_bcast_station(struct il_priv *il) 3513 { 3514 struct il_link_quality_cmd *link_cmd; 3515 unsigned long flags; 3516 u8 sta_id; 3517 3518 spin_lock_irqsave(&il->sta_lock, flags); 3519 sta_id = il_prep_station(il, il_bcast_addr, false, NULL); 3520 if (sta_id == IL_INVALID_STATION) { 3521 IL_ERR("Unable to prepare broadcast station\n"); 3522 spin_unlock_irqrestore(&il->sta_lock, flags); 3523 3524 return -EINVAL; 3525 } 3526 3527 il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE; 3528 il->stations[sta_id].used |= IL_STA_BCAST; 3529 spin_unlock_irqrestore(&il->sta_lock, flags); 3530 3531 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3532 if (!link_cmd) { 3533 IL_ERR 3534 ("Unable to initialize rate scaling for bcast station.\n"); 3535 return -ENOMEM; 3536 } 3537 3538 spin_lock_irqsave(&il->sta_lock, flags); 3539 il->stations[sta_id].lq = link_cmd; 3540 spin_unlock_irqrestore(&il->sta_lock, flags); 3541 3542 return 0; 3543 } 3544 3545 /** 3546 * il4965_update_bcast_station - update broadcast station's LQ command 3547 * 3548 * Only used by iwl4965. Placed here to have all bcast station management 3549 * code together. 3550 */ 3551 static int 3552 il4965_update_bcast_station(struct il_priv *il) 3553 { 3554 unsigned long flags; 3555 struct il_link_quality_cmd *link_cmd; 3556 u8 sta_id = il->hw_params.bcast_id; 3557 3558 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3559 if (!link_cmd) { 3560 IL_ERR("Unable to initialize rate scaling for bcast sta.\n"); 3561 return -ENOMEM; 3562 } 3563 3564 spin_lock_irqsave(&il->sta_lock, flags); 3565 if (il->stations[sta_id].lq) 3566 kfree(il->stations[sta_id].lq); 3567 else 3568 D_INFO("Bcast sta rate scaling has not been initialized.\n"); 3569 il->stations[sta_id].lq = link_cmd; 3570 spin_unlock_irqrestore(&il->sta_lock, flags); 3571 3572 return 0; 3573 } 3574 3575 int 3576 il4965_update_bcast_stations(struct il_priv *il) 3577 { 3578 return il4965_update_bcast_station(il); 3579 } 3580 3581 /** 3582 * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table 3583 */ 3584 int 3585 il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid) 3586 { 3587 unsigned long flags; 3588 struct il_addsta_cmd sta_cmd; 3589 3590 lockdep_assert_held(&il->mutex); 3591 3592 /* Remove "disable" flag, to enable Tx for this TID */ 3593 spin_lock_irqsave(&il->sta_lock, flags); 3594 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; 3595 il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); 3596 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3597 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3598 sizeof(struct il_addsta_cmd)); 3599 spin_unlock_irqrestore(&il->sta_lock, flags); 3600 3601 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3602 } 3603 3604 int 3605 il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid, 3606 u16 ssn) 3607 { 3608 unsigned long flags; 3609 int sta_id; 3610 struct il_addsta_cmd sta_cmd; 3611 3612 lockdep_assert_held(&il->mutex); 3613 3614 sta_id = il_sta_id(sta); 3615 if (sta_id == IL_INVALID_STATION) 3616 return -ENXIO; 3617 3618 spin_lock_irqsave(&il->sta_lock, flags); 3619 il->stations[sta_id].sta.station_flags_msk = 0; 3620 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; 3621 il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid; 3622 il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); 3623 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3624 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3625 sizeof(struct il_addsta_cmd)); 3626 spin_unlock_irqrestore(&il->sta_lock, flags); 3627 3628 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3629 } 3630 3631 int 3632 il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid) 3633 { 3634 unsigned long flags; 3635 int sta_id; 3636 struct il_addsta_cmd sta_cmd; 3637 3638 lockdep_assert_held(&il->mutex); 3639 3640 sta_id = il_sta_id(sta); 3641 if (sta_id == IL_INVALID_STATION) { 3642 IL_ERR("Invalid station for AGG tid %d\n", tid); 3643 return -ENXIO; 3644 } 3645 3646 spin_lock_irqsave(&il->sta_lock, flags); 3647 il->stations[sta_id].sta.station_flags_msk = 0; 3648 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; 3649 il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid; 3650 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3651 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3652 sizeof(struct il_addsta_cmd)); 3653 spin_unlock_irqrestore(&il->sta_lock, flags); 3654 3655 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3656 } 3657 3658 void 3659 il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt) 3660 { 3661 unsigned long flags; 3662 3663 spin_lock_irqsave(&il->sta_lock, flags); 3664 il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK; 3665 il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK; 3666 il->stations[sta_id].sta.sta.modify_mask = 3667 STA_MODIFY_SLEEP_TX_COUNT_MSK; 3668 il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt); 3669 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3670 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); 3671 spin_unlock_irqrestore(&il->sta_lock, flags); 3672 3673 } 3674 3675 void 3676 il4965_update_chain_flags(struct il_priv *il) 3677 { 3678 if (il->ops->set_rxon_chain) { 3679 il->ops->set_rxon_chain(il); 3680 if (il->active.rx_chain != il->staging.rx_chain) 3681 il_commit_rxon(il); 3682 } 3683 } 3684 3685 static void 3686 il4965_clear_free_frames(struct il_priv *il) 3687 { 3688 struct list_head *element; 3689 3690 D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count); 3691 3692 while (!list_empty(&il->free_frames)) { 3693 element = il->free_frames.next; 3694 list_del(element); 3695 kfree(list_entry(element, struct il_frame, list)); 3696 il->frames_count--; 3697 } 3698 3699 if (il->frames_count) { 3700 IL_WARN("%d frames still in use. Did we lose one?\n", 3701 il->frames_count); 3702 il->frames_count = 0; 3703 } 3704 } 3705 3706 static struct il_frame * 3707 il4965_get_free_frame(struct il_priv *il) 3708 { 3709 struct il_frame *frame; 3710 struct list_head *element; 3711 if (list_empty(&il->free_frames)) { 3712 frame = kzalloc(sizeof(*frame), GFP_KERNEL); 3713 if (!frame) { 3714 IL_ERR("Could not allocate frame!\n"); 3715 return NULL; 3716 } 3717 3718 il->frames_count++; 3719 return frame; 3720 } 3721 3722 element = il->free_frames.next; 3723 list_del(element); 3724 return list_entry(element, struct il_frame, list); 3725 } 3726 3727 static void 3728 il4965_free_frame(struct il_priv *il, struct il_frame *frame) 3729 { 3730 memset(frame, 0, sizeof(*frame)); 3731 list_add(&frame->list, &il->free_frames); 3732 } 3733 3734 static u32 3735 il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr, 3736 int left) 3737 { 3738 lockdep_assert_held(&il->mutex); 3739 3740 if (!il->beacon_skb) 3741 return 0; 3742 3743 if (il->beacon_skb->len > left) 3744 return 0; 3745 3746 memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len); 3747 3748 return il->beacon_skb->len; 3749 } 3750 3751 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */ 3752 static void 3753 il4965_set_beacon_tim(struct il_priv *il, 3754 struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon, 3755 u32 frame_size) 3756 { 3757 u16 tim_idx; 3758 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 3759 3760 /* 3761 * The idx is relative to frame start but we start looking at the 3762 * variable-length part of the beacon. 3763 */ 3764 tim_idx = mgmt->u.beacon.variable - beacon; 3765 3766 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 3767 while ((tim_idx < (frame_size - 2)) && 3768 (beacon[tim_idx] != WLAN_EID_TIM)) 3769 tim_idx += beacon[tim_idx + 1] + 2; 3770 3771 /* If TIM field was found, set variables */ 3772 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 3773 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx); 3774 tx_beacon_cmd->tim_size = beacon[tim_idx + 1]; 3775 } else 3776 IL_WARN("Unable to find TIM Element in beacon\n"); 3777 } 3778 3779 static unsigned int 3780 il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame) 3781 { 3782 struct il_tx_beacon_cmd *tx_beacon_cmd; 3783 u32 frame_size; 3784 u32 rate_flags; 3785 u32 rate; 3786 /* 3787 * We have to set up the TX command, the TX Beacon command, and the 3788 * beacon contents. 3789 */ 3790 3791 lockdep_assert_held(&il->mutex); 3792 3793 if (!il->beacon_enabled) { 3794 IL_ERR("Trying to build beacon without beaconing enabled\n"); 3795 return 0; 3796 } 3797 3798 /* Initialize memory */ 3799 tx_beacon_cmd = &frame->u.beacon; 3800 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); 3801 3802 /* Set up TX beacon contents */ 3803 frame_size = 3804 il4965_fill_beacon_frame(il, tx_beacon_cmd->frame, 3805 sizeof(frame->u) - sizeof(*tx_beacon_cmd)); 3806 if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE)) 3807 return 0; 3808 if (!frame_size) 3809 return 0; 3810 3811 /* Set up TX command fields */ 3812 tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size); 3813 tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id; 3814 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 3815 tx_beacon_cmd->tx.tx_flags = 3816 TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK | 3817 TX_CMD_FLG_STA_RATE_MSK; 3818 3819 /* Set up TX beacon command fields */ 3820 il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame, 3821 frame_size); 3822 3823 /* Set up packet rate and flags */ 3824 rate = il_get_lowest_plcp(il); 3825 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); 3826 rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; 3827 if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE)) 3828 rate_flags |= RATE_MCS_CCK_MSK; 3829 tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags); 3830 3831 return sizeof(*tx_beacon_cmd) + frame_size; 3832 } 3833 3834 int 3835 il4965_send_beacon_cmd(struct il_priv *il) 3836 { 3837 struct il_frame *frame; 3838 unsigned int frame_size; 3839 int rc; 3840 3841 frame = il4965_get_free_frame(il); 3842 if (!frame) { 3843 IL_ERR("Could not obtain free frame buffer for beacon " 3844 "command.\n"); 3845 return -ENOMEM; 3846 } 3847 3848 frame_size = il4965_hw_get_beacon_cmd(il, frame); 3849 if (!frame_size) { 3850 IL_ERR("Error configuring the beacon command\n"); 3851 il4965_free_frame(il, frame); 3852 return -EINVAL; 3853 } 3854 3855 rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]); 3856 3857 il4965_free_frame(il, frame); 3858 3859 return rc; 3860 } 3861 3862 static inline dma_addr_t 3863 il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx) 3864 { 3865 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3866 3867 dma_addr_t addr = get_unaligned_le32(&tb->lo); 3868 if (sizeof(dma_addr_t) > sizeof(u32)) 3869 addr |= 3870 ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 3871 16; 3872 3873 return addr; 3874 } 3875 3876 static inline u16 3877 il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx) 3878 { 3879 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3880 3881 return le16_to_cpu(tb->hi_n_len) >> 4; 3882 } 3883 3884 static inline void 3885 il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len) 3886 { 3887 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3888 u16 hi_n_len = len << 4; 3889 3890 put_unaligned_le32(addr, &tb->lo); 3891 if (sizeof(dma_addr_t) > sizeof(u32)) 3892 hi_n_len |= ((addr >> 16) >> 16) & 0xF; 3893 3894 tb->hi_n_len = cpu_to_le16(hi_n_len); 3895 3896 tfd->num_tbs = idx + 1; 3897 } 3898 3899 static inline u8 3900 il4965_tfd_get_num_tbs(struct il_tfd *tfd) 3901 { 3902 return tfd->num_tbs & 0x1f; 3903 } 3904 3905 /** 3906 * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] 3907 * @il - driver ilate data 3908 * @txq - tx queue 3909 * 3910 * Does NOT advance any TFD circular buffer read/write idxes 3911 * Does NOT free the TFD itself (which is within circular buffer) 3912 */ 3913 void 3914 il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq) 3915 { 3916 struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds; 3917 struct il_tfd *tfd; 3918 struct pci_dev *dev = il->pci_dev; 3919 int idx = txq->q.read_ptr; 3920 int i; 3921 int num_tbs; 3922 3923 tfd = &tfd_tmp[idx]; 3924 3925 /* Sanity check on number of chunks */ 3926 num_tbs = il4965_tfd_get_num_tbs(tfd); 3927 3928 if (num_tbs >= IL_NUM_OF_TBS) { 3929 IL_ERR("Too many chunks: %i\n", num_tbs); 3930 /* @todo issue fatal error, it is quite serious situation */ 3931 return; 3932 } 3933 3934 /* Unmap tx_cmd */ 3935 if (num_tbs) 3936 pci_unmap_single(dev, dma_unmap_addr(&txq->meta[idx], mapping), 3937 dma_unmap_len(&txq->meta[idx], len), 3938 PCI_DMA_BIDIRECTIONAL); 3939 3940 /* Unmap chunks, if any. */ 3941 for (i = 1; i < num_tbs; i++) 3942 pci_unmap_single(dev, il4965_tfd_tb_get_addr(tfd, i), 3943 il4965_tfd_tb_get_len(tfd, i), 3944 PCI_DMA_TODEVICE); 3945 3946 /* free SKB */ 3947 if (txq->skbs) { 3948 struct sk_buff *skb = txq->skbs[txq->q.read_ptr]; 3949 3950 /* can be called from irqs-disabled context */ 3951 if (skb) { 3952 dev_kfree_skb_any(skb); 3953 txq->skbs[txq->q.read_ptr] = NULL; 3954 } 3955 } 3956 } 3957 3958 int 3959 il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq, 3960 dma_addr_t addr, u16 len, u8 reset, u8 pad) 3961 { 3962 struct il_queue *q; 3963 struct il_tfd *tfd, *tfd_tmp; 3964 u32 num_tbs; 3965 3966 q = &txq->q; 3967 tfd_tmp = (struct il_tfd *)txq->tfds; 3968 tfd = &tfd_tmp[q->write_ptr]; 3969 3970 if (reset) 3971 memset(tfd, 0, sizeof(*tfd)); 3972 3973 num_tbs = il4965_tfd_get_num_tbs(tfd); 3974 3975 /* Each TFD can point to a maximum 20 Tx buffers */ 3976 if (num_tbs >= IL_NUM_OF_TBS) { 3977 IL_ERR("Error can not send more than %d chunks\n", 3978 IL_NUM_OF_TBS); 3979 return -EINVAL; 3980 } 3981 3982 BUG_ON(addr & ~DMA_BIT_MASK(36)); 3983 if (unlikely(addr & ~IL_TX_DMA_MASK)) 3984 IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr); 3985 3986 il4965_tfd_set_tb(tfd, num_tbs, addr, len); 3987 3988 return 0; 3989 } 3990 3991 /* 3992 * Tell nic where to find circular buffer of Tx Frame Descriptors for 3993 * given Tx queue, and enable the DMA channel used for that queue. 3994 * 3995 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA 3996 * channels supported in hardware. 3997 */ 3998 int 3999 il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq) 4000 { 4001 int txq_id = txq->q.id; 4002 4003 /* Circular buffer (TFD queue in DRAM) physical base address */ 4004 il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8); 4005 4006 return 0; 4007 } 4008 4009 /****************************************************************************** 4010 * 4011 * Generic RX handler implementations 4012 * 4013 ******************************************************************************/ 4014 static void 4015 il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb) 4016 { 4017 struct il_rx_pkt *pkt = rxb_addr(rxb); 4018 struct il_alive_resp *palive; 4019 struct delayed_work *pwork; 4020 4021 palive = &pkt->u.alive_frame; 4022 4023 D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n", 4024 palive->is_valid, palive->ver_type, palive->ver_subtype); 4025 4026 if (palive->ver_subtype == INITIALIZE_SUBTYPE) { 4027 D_INFO("Initialization Alive received.\n"); 4028 memcpy(&il->card_alive_init, &pkt->u.alive_frame, 4029 sizeof(struct il_init_alive_resp)); 4030 pwork = &il->init_alive_start; 4031 } else { 4032 D_INFO("Runtime Alive received.\n"); 4033 memcpy(&il->card_alive, &pkt->u.alive_frame, 4034 sizeof(struct il_alive_resp)); 4035 pwork = &il->alive_start; 4036 } 4037 4038 /* We delay the ALIVE response by 5ms to 4039 * give the HW RF Kill time to activate... */ 4040 if (palive->is_valid == UCODE_VALID_OK) 4041 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5)); 4042 else 4043 IL_WARN("uCode did not respond OK.\n"); 4044 } 4045 4046 /** 4047 * il4965_bg_stats_periodic - Timer callback to queue stats 4048 * 4049 * This callback is provided in order to send a stats request. 4050 * 4051 * This timer function is continually reset to execute within 4052 * 60 seconds since the last N_STATS was received. We need to 4053 * ensure we receive the stats in order to update the temperature 4054 * used for calibrating the TXPOWER. 4055 */ 4056 static void 4057 il4965_bg_stats_periodic(struct timer_list *t) 4058 { 4059 struct il_priv *il = from_timer(il, t, stats_periodic); 4060 4061 if (test_bit(S_EXIT_PENDING, &il->status)) 4062 return; 4063 4064 /* dont send host command if rf-kill is on */ 4065 if (!il_is_ready_rf(il)) 4066 return; 4067 4068 il_send_stats_request(il, CMD_ASYNC, false); 4069 } 4070 4071 static void 4072 il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb) 4073 { 4074 struct il_rx_pkt *pkt = rxb_addr(rxb); 4075 struct il4965_beacon_notif *beacon = 4076 (struct il4965_beacon_notif *)pkt->u.raw; 4077 #ifdef CONFIG_IWLEGACY_DEBUG 4078 u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); 4079 4080 D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n", 4081 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK, 4082 beacon->beacon_notify_hdr.failure_frame, 4083 le32_to_cpu(beacon->ibss_mgr_status), 4084 le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate); 4085 #endif 4086 il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); 4087 } 4088 4089 static void 4090 il4965_perform_ct_kill_task(struct il_priv *il) 4091 { 4092 unsigned long flags; 4093 4094 D_POWER("Stop all queues\n"); 4095 4096 if (il->mac80211_registered) 4097 ieee80211_stop_queues(il->hw); 4098 4099 _il_wr(il, CSR_UCODE_DRV_GP1_SET, 4100 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); 4101 _il_rd(il, CSR_UCODE_DRV_GP1); 4102 4103 spin_lock_irqsave(&il->reg_lock, flags); 4104 if (likely(_il_grab_nic_access(il))) 4105 _il_release_nic_access(il); 4106 spin_unlock_irqrestore(&il->reg_lock, flags); 4107 } 4108 4109 /* Handle notification from uCode that card's power state is changing 4110 * due to software, hardware, or critical temperature RFKILL */ 4111 static void 4112 il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb) 4113 { 4114 struct il_rx_pkt *pkt = rxb_addr(rxb); 4115 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); 4116 unsigned long status = il->status; 4117 4118 D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n", 4119 (flags & HW_CARD_DISABLED) ? "Kill" : "On", 4120 (flags & SW_CARD_DISABLED) ? "Kill" : "On", 4121 (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached"); 4122 4123 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) { 4124 4125 _il_wr(il, CSR_UCODE_DRV_GP1_SET, 4126 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 4127 4128 il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); 4129 4130 if (!(flags & RXON_CARD_DISABLED)) { 4131 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, 4132 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 4133 il_wr(il, HBUS_TARG_MBX_C, 4134 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); 4135 } 4136 } 4137 4138 if (flags & CT_CARD_DISABLED) 4139 il4965_perform_ct_kill_task(il); 4140 4141 if (flags & HW_CARD_DISABLED) 4142 set_bit(S_RFKILL, &il->status); 4143 else 4144 clear_bit(S_RFKILL, &il->status); 4145 4146 if (!(flags & RXON_CARD_DISABLED)) 4147 il_scan_cancel(il); 4148 4149 if ((test_bit(S_RFKILL, &status) != 4150 test_bit(S_RFKILL, &il->status))) 4151 wiphy_rfkill_set_hw_state(il->hw->wiphy, 4152 test_bit(S_RFKILL, &il->status)); 4153 else 4154 wake_up(&il->wait_command_queue); 4155 } 4156 4157 /** 4158 * il4965_setup_handlers - Initialize Rx handler callbacks 4159 * 4160 * Setup the RX handlers for each of the reply types sent from the uCode 4161 * to the host. 4162 * 4163 * This function chains into the hardware specific files for them to setup 4164 * any hardware specific handlers as well. 4165 */ 4166 static void 4167 il4965_setup_handlers(struct il_priv *il) 4168 { 4169 il->handlers[N_ALIVE] = il4965_hdl_alive; 4170 il->handlers[N_ERROR] = il_hdl_error; 4171 il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa; 4172 il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement; 4173 il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep; 4174 il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats; 4175 il->handlers[N_BEACON] = il4965_hdl_beacon; 4176 4177 /* 4178 * The same handler is used for both the REPLY to a discrete 4179 * stats request from the host as well as for the periodic 4180 * stats notifications (after received beacons) from the uCode. 4181 */ 4182 il->handlers[C_STATS] = il4965_hdl_c_stats; 4183 il->handlers[N_STATS] = il4965_hdl_stats; 4184 4185 il_setup_rx_scan_handlers(il); 4186 4187 /* status change handler */ 4188 il->handlers[N_CARD_STATE] = il4965_hdl_card_state; 4189 4190 il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon; 4191 /* Rx handlers */ 4192 il->handlers[N_RX_PHY] = il4965_hdl_rx_phy; 4193 il->handlers[N_RX_MPDU] = il4965_hdl_rx; 4194 il->handlers[N_RX] = il4965_hdl_rx; 4195 /* block ack */ 4196 il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba; 4197 /* Tx response */ 4198 il->handlers[C_TX] = il4965_hdl_tx; 4199 } 4200 4201 /** 4202 * il4965_rx_handle - Main entry function for receiving responses from uCode 4203 * 4204 * Uses the il->handlers callback function array to invoke 4205 * the appropriate handlers, including command responses, 4206 * frame-received notifications, and other notifications. 4207 */ 4208 void 4209 il4965_rx_handle(struct il_priv *il) 4210 { 4211 struct il_rx_buf *rxb; 4212 struct il_rx_pkt *pkt; 4213 struct il_rx_queue *rxq = &il->rxq; 4214 u32 r, i; 4215 int reclaim; 4216 unsigned long flags; 4217 u8 fill_rx = 0; 4218 u32 count = 8; 4219 int total_empty; 4220 4221 /* uCode's read idx (stored in shared DRAM) indicates the last Rx 4222 * buffer that the driver may process (last buffer filled by ucode). */ 4223 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; 4224 i = rxq->read; 4225 4226 /* Rx interrupt, but nothing sent from uCode */ 4227 if (i == r) 4228 D_RX("r = %d, i = %d\n", r, i); 4229 4230 /* calculate total frames need to be restock after handling RX */ 4231 total_empty = r - rxq->write_actual; 4232 if (total_empty < 0) 4233 total_empty += RX_QUEUE_SIZE; 4234 4235 if (total_empty > (RX_QUEUE_SIZE / 2)) 4236 fill_rx = 1; 4237 4238 while (i != r) { 4239 int len; 4240 4241 rxb = rxq->queue[i]; 4242 4243 /* If an RXB doesn't have a Rx queue slot associated with it, 4244 * then a bug has been introduced in the queue refilling 4245 * routines -- catch it here */ 4246 BUG_ON(rxb == NULL); 4247 4248 rxq->queue[i] = NULL; 4249 4250 pci_unmap_page(il->pci_dev, rxb->page_dma, 4251 PAGE_SIZE << il->hw_params.rx_page_order, 4252 PCI_DMA_FROMDEVICE); 4253 pkt = rxb_addr(rxb); 4254 4255 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK; 4256 len += sizeof(u32); /* account for status word */ 4257 4258 reclaim = il_need_reclaim(il, pkt); 4259 4260 /* Based on type of command response or notification, 4261 * handle those that need handling via function in 4262 * handlers table. See il4965_setup_handlers() */ 4263 if (il->handlers[pkt->hdr.cmd]) { 4264 D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i, 4265 il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); 4266 il->isr_stats.handlers[pkt->hdr.cmd]++; 4267 il->handlers[pkt->hdr.cmd] (il, rxb); 4268 } else { 4269 /* No handling needed */ 4270 D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r, 4271 i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); 4272 } 4273 4274 /* 4275 * XXX: After here, we should always check rxb->page 4276 * against NULL before touching it or its virtual 4277 * memory (pkt). Because some handler might have 4278 * already taken or freed the pages. 4279 */ 4280 4281 if (reclaim) { 4282 /* Invoke any callbacks, transfer the buffer to caller, 4283 * and fire off the (possibly) blocking il_send_cmd() 4284 * as we reclaim the driver command queue */ 4285 if (rxb->page) 4286 il_tx_cmd_complete(il, rxb); 4287 else 4288 IL_WARN("Claim null rxb?\n"); 4289 } 4290 4291 /* Reuse the page if possible. For notification packets and 4292 * SKBs that fail to Rx correctly, add them back into the 4293 * rx_free list for reuse later. */ 4294 spin_lock_irqsave(&rxq->lock, flags); 4295 if (rxb->page != NULL) { 4296 rxb->page_dma = 4297 pci_map_page(il->pci_dev, rxb->page, 0, 4298 PAGE_SIZE << il->hw_params. 4299 rx_page_order, PCI_DMA_FROMDEVICE); 4300 4301 if (unlikely(pci_dma_mapping_error(il->pci_dev, 4302 rxb->page_dma))) { 4303 __il_free_pages(il, rxb->page); 4304 rxb->page = NULL; 4305 list_add_tail(&rxb->list, &rxq->rx_used); 4306 } else { 4307 list_add_tail(&rxb->list, &rxq->rx_free); 4308 rxq->free_count++; 4309 } 4310 } else 4311 list_add_tail(&rxb->list, &rxq->rx_used); 4312 4313 spin_unlock_irqrestore(&rxq->lock, flags); 4314 4315 i = (i + 1) & RX_QUEUE_MASK; 4316 /* If there are a lot of unused frames, 4317 * restock the Rx queue so ucode wont assert. */ 4318 if (fill_rx) { 4319 count++; 4320 if (count >= 8) { 4321 rxq->read = i; 4322 il4965_rx_replenish_now(il); 4323 count = 0; 4324 } 4325 } 4326 } 4327 4328 /* Backtrack one entry */ 4329 rxq->read = i; 4330 if (fill_rx) 4331 il4965_rx_replenish_now(il); 4332 else 4333 il4965_rx_queue_restock(il); 4334 } 4335 4336 /* call this function to flush any scheduled tasklet */ 4337 static inline void 4338 il4965_synchronize_irq(struct il_priv *il) 4339 { 4340 /* wait to make sure we flush pending tasklet */ 4341 synchronize_irq(il->pci_dev->irq); 4342 tasklet_kill(&il->irq_tasklet); 4343 } 4344 4345 static void 4346 il4965_irq_tasklet(struct il_priv *il) 4347 { 4348 u32 inta, handled = 0; 4349 u32 inta_fh; 4350 unsigned long flags; 4351 u32 i; 4352 #ifdef CONFIG_IWLEGACY_DEBUG 4353 u32 inta_mask; 4354 #endif 4355 4356 spin_lock_irqsave(&il->lock, flags); 4357 4358 /* Ack/clear/reset pending uCode interrupts. 4359 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, 4360 * and will clear only when CSR_FH_INT_STATUS gets cleared. */ 4361 inta = _il_rd(il, CSR_INT); 4362 _il_wr(il, CSR_INT, inta); 4363 4364 /* Ack/clear/reset pending flow-handler (DMA) interrupts. 4365 * Any new interrupts that happen after this, either while we're 4366 * in this tasklet, or later, will show up in next ISR/tasklet. */ 4367 inta_fh = _il_rd(il, CSR_FH_INT_STATUS); 4368 _il_wr(il, CSR_FH_INT_STATUS, inta_fh); 4369 4370 #ifdef CONFIG_IWLEGACY_DEBUG 4371 if (il_get_debug_level(il) & IL_DL_ISR) { 4372 /* just for debug */ 4373 inta_mask = _il_rd(il, CSR_INT_MASK); 4374 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, 4375 inta_mask, inta_fh); 4376 } 4377 #endif 4378 4379 spin_unlock_irqrestore(&il->lock, flags); 4380 4381 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not 4382 * atomic, make sure that inta covers all the interrupts that 4383 * we've discovered, even if FH interrupt came in just after 4384 * reading CSR_INT. */ 4385 if (inta_fh & CSR49_FH_INT_RX_MASK) 4386 inta |= CSR_INT_BIT_FH_RX; 4387 if (inta_fh & CSR49_FH_INT_TX_MASK) 4388 inta |= CSR_INT_BIT_FH_TX; 4389 4390 /* Now service all interrupt bits discovered above. */ 4391 if (inta & CSR_INT_BIT_HW_ERR) { 4392 IL_ERR("Hardware error detected. Restarting.\n"); 4393 4394 /* Tell the device to stop sending interrupts */ 4395 il_disable_interrupts(il); 4396 4397 il->isr_stats.hw++; 4398 il_irq_handle_error(il); 4399 4400 handled |= CSR_INT_BIT_HW_ERR; 4401 4402 return; 4403 } 4404 #ifdef CONFIG_IWLEGACY_DEBUG 4405 if (il_get_debug_level(il) & (IL_DL_ISR)) { 4406 /* NIC fires this, but we don't use it, redundant with WAKEUP */ 4407 if (inta & CSR_INT_BIT_SCD) { 4408 D_ISR("Scheduler finished to transmit " 4409 "the frame/frames.\n"); 4410 il->isr_stats.sch++; 4411 } 4412 4413 /* Alive notification via Rx interrupt will do the real work */ 4414 if (inta & CSR_INT_BIT_ALIVE) { 4415 D_ISR("Alive interrupt\n"); 4416 il->isr_stats.alive++; 4417 } 4418 } 4419 #endif 4420 /* Safely ignore these bits for debug checks below */ 4421 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); 4422 4423 /* HW RF KILL switch toggled */ 4424 if (inta & CSR_INT_BIT_RF_KILL) { 4425 int hw_rf_kill = 0; 4426 4427 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) 4428 hw_rf_kill = 1; 4429 4430 IL_WARN("RF_KILL bit toggled to %s.\n", 4431 hw_rf_kill ? "disable radio" : "enable radio"); 4432 4433 il->isr_stats.rfkill++; 4434 4435 /* driver only loads ucode once setting the interface up. 4436 * the driver allows loading the ucode even if the radio 4437 * is killed. Hence update the killswitch state here. The 4438 * rfkill handler will care about restarting if needed. 4439 */ 4440 if (hw_rf_kill) { 4441 set_bit(S_RFKILL, &il->status); 4442 } else { 4443 clear_bit(S_RFKILL, &il->status); 4444 il_force_reset(il, true); 4445 } 4446 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill); 4447 4448 handled |= CSR_INT_BIT_RF_KILL; 4449 } 4450 4451 /* Chip got too hot and stopped itself */ 4452 if (inta & CSR_INT_BIT_CT_KILL) { 4453 IL_ERR("Microcode CT kill error detected.\n"); 4454 il->isr_stats.ctkill++; 4455 handled |= CSR_INT_BIT_CT_KILL; 4456 } 4457 4458 /* Error detected by uCode */ 4459 if (inta & CSR_INT_BIT_SW_ERR) { 4460 IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n", 4461 inta); 4462 il->isr_stats.sw++; 4463 il_irq_handle_error(il); 4464 handled |= CSR_INT_BIT_SW_ERR; 4465 } 4466 4467 /* 4468 * uCode wakes up after power-down sleep. 4469 * Tell device about any new tx or host commands enqueued, 4470 * and about any Rx buffers made available while asleep. 4471 */ 4472 if (inta & CSR_INT_BIT_WAKEUP) { 4473 D_ISR("Wakeup interrupt\n"); 4474 il_rx_queue_update_write_ptr(il, &il->rxq); 4475 for (i = 0; i < il->hw_params.max_txq_num; i++) 4476 il_txq_update_write_ptr(il, &il->txq[i]); 4477 il->isr_stats.wakeup++; 4478 handled |= CSR_INT_BIT_WAKEUP; 4479 } 4480 4481 /* All uCode command responses, including Tx command responses, 4482 * Rx "responses" (frame-received notification), and other 4483 * notifications from uCode come through here*/ 4484 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { 4485 il4965_rx_handle(il); 4486 il->isr_stats.rx++; 4487 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); 4488 } 4489 4490 /* This "Tx" DMA channel is used only for loading uCode */ 4491 if (inta & CSR_INT_BIT_FH_TX) { 4492 D_ISR("uCode load interrupt\n"); 4493 il->isr_stats.tx++; 4494 handled |= CSR_INT_BIT_FH_TX; 4495 /* Wake up uCode load routine, now that load is complete */ 4496 il->ucode_write_complete = 1; 4497 wake_up(&il->wait_command_queue); 4498 } 4499 4500 if (inta & ~handled) { 4501 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled); 4502 il->isr_stats.unhandled++; 4503 } 4504 4505 if (inta & ~(il->inta_mask)) { 4506 IL_WARN("Disabled INTA bits 0x%08x were pending\n", 4507 inta & ~il->inta_mask); 4508 IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh); 4509 } 4510 4511 /* Re-enable all interrupts */ 4512 /* only Re-enable if disabled by irq */ 4513 if (test_bit(S_INT_ENABLED, &il->status)) 4514 il_enable_interrupts(il); 4515 /* Re-enable RF_KILL if it occurred */ 4516 else if (handled & CSR_INT_BIT_RF_KILL) 4517 il_enable_rfkill_int(il); 4518 4519 #ifdef CONFIG_IWLEGACY_DEBUG 4520 if (il_get_debug_level(il) & (IL_DL_ISR)) { 4521 inta = _il_rd(il, CSR_INT); 4522 inta_mask = _il_rd(il, CSR_INT_MASK); 4523 inta_fh = _il_rd(il, CSR_FH_INT_STATUS); 4524 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " 4525 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); 4526 } 4527 #endif 4528 } 4529 4530 /***************************************************************************** 4531 * 4532 * sysfs attributes 4533 * 4534 *****************************************************************************/ 4535 4536 #ifdef CONFIG_IWLEGACY_DEBUG 4537 4538 /* 4539 * The following adds a new attribute to the sysfs representation 4540 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/) 4541 * used for controlling the debug level. 4542 * 4543 * See the level definitions in iwl for details. 4544 * 4545 * The debug_level being managed using sysfs below is a per device debug 4546 * level that is used instead of the global debug level if it (the per 4547 * device debug level) is set. 4548 */ 4549 static ssize_t 4550 il4965_show_debug_level(struct device *d, struct device_attribute *attr, 4551 char *buf) 4552 { 4553 struct il_priv *il = dev_get_drvdata(d); 4554 return sprintf(buf, "0x%08X\n", il_get_debug_level(il)); 4555 } 4556 4557 static ssize_t 4558 il4965_store_debug_level(struct device *d, struct device_attribute *attr, 4559 const char *buf, size_t count) 4560 { 4561 struct il_priv *il = dev_get_drvdata(d); 4562 unsigned long val; 4563 int ret; 4564 4565 ret = kstrtoul(buf, 0, &val); 4566 if (ret) 4567 IL_ERR("%s is not in hex or decimal form.\n", buf); 4568 else 4569 il->debug_level = val; 4570 4571 return strnlen(buf, count); 4572 } 4573 4574 static DEVICE_ATTR(debug_level, 0644, il4965_show_debug_level, 4575 il4965_store_debug_level); 4576 4577 #endif /* CONFIG_IWLEGACY_DEBUG */ 4578 4579 static ssize_t 4580 il4965_show_temperature(struct device *d, struct device_attribute *attr, 4581 char *buf) 4582 { 4583 struct il_priv *il = dev_get_drvdata(d); 4584 4585 if (!il_is_alive(il)) 4586 return -EAGAIN; 4587 4588 return sprintf(buf, "%d\n", il->temperature); 4589 } 4590 4591 static DEVICE_ATTR(temperature, 0444, il4965_show_temperature, NULL); 4592 4593 static ssize_t 4594 il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf) 4595 { 4596 struct il_priv *il = dev_get_drvdata(d); 4597 4598 if (!il_is_ready_rf(il)) 4599 return sprintf(buf, "off\n"); 4600 else 4601 return sprintf(buf, "%d\n", il->tx_power_user_lmt); 4602 } 4603 4604 static ssize_t 4605 il4965_store_tx_power(struct device *d, struct device_attribute *attr, 4606 const char *buf, size_t count) 4607 { 4608 struct il_priv *il = dev_get_drvdata(d); 4609 unsigned long val; 4610 int ret; 4611 4612 ret = kstrtoul(buf, 10, &val); 4613 if (ret) 4614 IL_INFO("%s is not in decimal form.\n", buf); 4615 else { 4616 ret = il_set_tx_power(il, val, false); 4617 if (ret) 4618 IL_ERR("failed setting tx power (0x%08x).\n", ret); 4619 else 4620 ret = count; 4621 } 4622 return ret; 4623 } 4624 4625 static DEVICE_ATTR(tx_power, 0644, il4965_show_tx_power, 4626 il4965_store_tx_power); 4627 4628 static struct attribute *il_sysfs_entries[] = { 4629 &dev_attr_temperature.attr, 4630 &dev_attr_tx_power.attr, 4631 #ifdef CONFIG_IWLEGACY_DEBUG 4632 &dev_attr_debug_level.attr, 4633 #endif 4634 NULL 4635 }; 4636 4637 static const struct attribute_group il_attribute_group = { 4638 .name = NULL, /* put in device directory */ 4639 .attrs = il_sysfs_entries, 4640 }; 4641 4642 /****************************************************************************** 4643 * 4644 * uCode download functions 4645 * 4646 ******************************************************************************/ 4647 4648 static void 4649 il4965_dealloc_ucode_pci(struct il_priv *il) 4650 { 4651 il_free_fw_desc(il->pci_dev, &il->ucode_code); 4652 il_free_fw_desc(il->pci_dev, &il->ucode_data); 4653 il_free_fw_desc(il->pci_dev, &il->ucode_data_backup); 4654 il_free_fw_desc(il->pci_dev, &il->ucode_init); 4655 il_free_fw_desc(il->pci_dev, &il->ucode_init_data); 4656 il_free_fw_desc(il->pci_dev, &il->ucode_boot); 4657 } 4658 4659 static void 4660 il4965_nic_start(struct il_priv *il) 4661 { 4662 /* Remove all resets to allow NIC to operate */ 4663 _il_wr(il, CSR_RESET, 0); 4664 } 4665 4666 static void il4965_ucode_callback(const struct firmware *ucode_raw, 4667 void *context); 4668 static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length); 4669 4670 static int __must_check 4671 il4965_request_firmware(struct il_priv *il, bool first) 4672 { 4673 const char *name_pre = il->cfg->fw_name_pre; 4674 char tag[8]; 4675 4676 if (first) { 4677 il->fw_idx = il->cfg->ucode_api_max; 4678 sprintf(tag, "%d", il->fw_idx); 4679 } else { 4680 il->fw_idx--; 4681 sprintf(tag, "%d", il->fw_idx); 4682 } 4683 4684 if (il->fw_idx < il->cfg->ucode_api_min) { 4685 IL_ERR("no suitable firmware found!\n"); 4686 return -ENOENT; 4687 } 4688 4689 sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode"); 4690 4691 D_INFO("attempting to load firmware '%s'\n", il->firmware_name); 4692 4693 return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name, 4694 &il->pci_dev->dev, GFP_KERNEL, il, 4695 il4965_ucode_callback); 4696 } 4697 4698 struct il4965_firmware_pieces { 4699 const void *inst, *data, *init, *init_data, *boot; 4700 size_t inst_size, data_size, init_size, init_data_size, boot_size; 4701 }; 4702 4703 static int 4704 il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw, 4705 struct il4965_firmware_pieces *pieces) 4706 { 4707 struct il_ucode_header *ucode = (void *)ucode_raw->data; 4708 u32 api_ver, hdr_size; 4709 const u8 *src; 4710 4711 il->ucode_ver = le32_to_cpu(ucode->ver); 4712 api_ver = IL_UCODE_API(il->ucode_ver); 4713 4714 switch (api_ver) { 4715 default: 4716 case 0: 4717 case 1: 4718 case 2: 4719 hdr_size = 24; 4720 if (ucode_raw->size < hdr_size) { 4721 IL_ERR("File size too small!\n"); 4722 return -EINVAL; 4723 } 4724 pieces->inst_size = le32_to_cpu(ucode->v1.inst_size); 4725 pieces->data_size = le32_to_cpu(ucode->v1.data_size); 4726 pieces->init_size = le32_to_cpu(ucode->v1.init_size); 4727 pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size); 4728 pieces->boot_size = le32_to_cpu(ucode->v1.boot_size); 4729 src = ucode->v1.data; 4730 break; 4731 } 4732 4733 /* Verify size of file vs. image size info in file's header */ 4734 if (ucode_raw->size != 4735 hdr_size + pieces->inst_size + pieces->data_size + 4736 pieces->init_size + pieces->init_data_size + pieces->boot_size) { 4737 4738 IL_ERR("uCode file size %d does not match expected size\n", 4739 (int)ucode_raw->size); 4740 return -EINVAL; 4741 } 4742 4743 pieces->inst = src; 4744 src += pieces->inst_size; 4745 pieces->data = src; 4746 src += pieces->data_size; 4747 pieces->init = src; 4748 src += pieces->init_size; 4749 pieces->init_data = src; 4750 src += pieces->init_data_size; 4751 pieces->boot = src; 4752 src += pieces->boot_size; 4753 4754 return 0; 4755 } 4756 4757 /** 4758 * il4965_ucode_callback - callback when firmware was loaded 4759 * 4760 * If loaded successfully, copies the firmware into buffers 4761 * for the card to fetch (via DMA). 4762 */ 4763 static void 4764 il4965_ucode_callback(const struct firmware *ucode_raw, void *context) 4765 { 4766 struct il_priv *il = context; 4767 int err; 4768 struct il4965_firmware_pieces pieces; 4769 const unsigned int api_max = il->cfg->ucode_api_max; 4770 const unsigned int api_min = il->cfg->ucode_api_min; 4771 u32 api_ver; 4772 4773 u32 max_probe_length = 200; 4774 u32 standard_phy_calibration_size = 4775 IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE; 4776 4777 memset(&pieces, 0, sizeof(pieces)); 4778 4779 if (!ucode_raw) { 4780 if (il->fw_idx <= il->cfg->ucode_api_max) 4781 IL_ERR("request for firmware file '%s' failed.\n", 4782 il->firmware_name); 4783 goto try_again; 4784 } 4785 4786 D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name, 4787 ucode_raw->size); 4788 4789 /* Make sure that we got at least the API version number */ 4790 if (ucode_raw->size < 4) { 4791 IL_ERR("File size way too small!\n"); 4792 goto try_again; 4793 } 4794 4795 /* Data from ucode file: header followed by uCode images */ 4796 err = il4965_load_firmware(il, ucode_raw, &pieces); 4797 4798 if (err) 4799 goto try_again; 4800 4801 api_ver = IL_UCODE_API(il->ucode_ver); 4802 4803 /* 4804 * api_ver should match the api version forming part of the 4805 * firmware filename ... but we don't check for that and only rely 4806 * on the API version read from firmware header from here on forward 4807 */ 4808 if (api_ver < api_min || api_ver > api_max) { 4809 IL_ERR("Driver unable to support your firmware API. " 4810 "Driver supports v%u, firmware is v%u.\n", api_max, 4811 api_ver); 4812 goto try_again; 4813 } 4814 4815 if (api_ver != api_max) 4816 IL_ERR("Firmware has old API version. Expected v%u, " 4817 "got v%u. New firmware can be obtained " 4818 "from http://www.intellinuxwireless.org.\n", api_max, 4819 api_ver); 4820 4821 IL_INFO("loaded firmware version %u.%u.%u.%u\n", 4822 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver), 4823 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver)); 4824 4825 snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version), 4826 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver), 4827 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver), 4828 IL_UCODE_SERIAL(il->ucode_ver)); 4829 4830 /* 4831 * For any of the failures below (before allocating pci memory) 4832 * we will try to load a version with a smaller API -- maybe the 4833 * user just got a corrupted version of the latest API. 4834 */ 4835 4836 D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver); 4837 D_INFO("f/w package hdr runtime inst size = %zd\n", pieces.inst_size); 4838 D_INFO("f/w package hdr runtime data size = %zd\n", pieces.data_size); 4839 D_INFO("f/w package hdr init inst size = %zd\n", pieces.init_size); 4840 D_INFO("f/w package hdr init data size = %zd\n", pieces.init_data_size); 4841 D_INFO("f/w package hdr boot inst size = %zd\n", pieces.boot_size); 4842 4843 /* Verify that uCode images will fit in card's SRAM */ 4844 if (pieces.inst_size > il->hw_params.max_inst_size) { 4845 IL_ERR("uCode instr len %zd too large to fit in\n", 4846 pieces.inst_size); 4847 goto try_again; 4848 } 4849 4850 if (pieces.data_size > il->hw_params.max_data_size) { 4851 IL_ERR("uCode data len %zd too large to fit in\n", 4852 pieces.data_size); 4853 goto try_again; 4854 } 4855 4856 if (pieces.init_size > il->hw_params.max_inst_size) { 4857 IL_ERR("uCode init instr len %zd too large to fit in\n", 4858 pieces.init_size); 4859 goto try_again; 4860 } 4861 4862 if (pieces.init_data_size > il->hw_params.max_data_size) { 4863 IL_ERR("uCode init data len %zd too large to fit in\n", 4864 pieces.init_data_size); 4865 goto try_again; 4866 } 4867 4868 if (pieces.boot_size > il->hw_params.max_bsm_size) { 4869 IL_ERR("uCode boot instr len %zd too large to fit in\n", 4870 pieces.boot_size); 4871 goto try_again; 4872 } 4873 4874 /* Allocate ucode buffers for card's bus-master loading ... */ 4875 4876 /* Runtime instructions and 2 copies of data: 4877 * 1) unmodified from disk 4878 * 2) backup cache for save/restore during power-downs */ 4879 il->ucode_code.len = pieces.inst_size; 4880 il_alloc_fw_desc(il->pci_dev, &il->ucode_code); 4881 4882 il->ucode_data.len = pieces.data_size; 4883 il_alloc_fw_desc(il->pci_dev, &il->ucode_data); 4884 4885 il->ucode_data_backup.len = pieces.data_size; 4886 il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup); 4887 4888 if (!il->ucode_code.v_addr || !il->ucode_data.v_addr || 4889 !il->ucode_data_backup.v_addr) 4890 goto err_pci_alloc; 4891 4892 /* Initialization instructions and data */ 4893 if (pieces.init_size && pieces.init_data_size) { 4894 il->ucode_init.len = pieces.init_size; 4895 il_alloc_fw_desc(il->pci_dev, &il->ucode_init); 4896 4897 il->ucode_init_data.len = pieces.init_data_size; 4898 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data); 4899 4900 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr) 4901 goto err_pci_alloc; 4902 } 4903 4904 /* Bootstrap (instructions only, no data) */ 4905 if (pieces.boot_size) { 4906 il->ucode_boot.len = pieces.boot_size; 4907 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot); 4908 4909 if (!il->ucode_boot.v_addr) 4910 goto err_pci_alloc; 4911 } 4912 4913 /* Now that we can no longer fail, copy information */ 4914 4915 il->sta_key_max_num = STA_KEY_MAX_NUM; 4916 4917 /* Copy images into buffers for card's bus-master reads ... */ 4918 4919 /* Runtime instructions (first block of data in file) */ 4920 D_INFO("Copying (but not loading) uCode instr len %zd\n", 4921 pieces.inst_size); 4922 memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size); 4923 4924 D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", 4925 il->ucode_code.v_addr, (u32) il->ucode_code.p_addr); 4926 4927 /* 4928 * Runtime data 4929 * NOTE: Copy into backup buffer will be done in il_up() 4930 */ 4931 D_INFO("Copying (but not loading) uCode data len %zd\n", 4932 pieces.data_size); 4933 memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size); 4934 memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size); 4935 4936 /* Initialization instructions */ 4937 if (pieces.init_size) { 4938 D_INFO("Copying (but not loading) init instr len %zd\n", 4939 pieces.init_size); 4940 memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size); 4941 } 4942 4943 /* Initialization data */ 4944 if (pieces.init_data_size) { 4945 D_INFO("Copying (but not loading) init data len %zd\n", 4946 pieces.init_data_size); 4947 memcpy(il->ucode_init_data.v_addr, pieces.init_data, 4948 pieces.init_data_size); 4949 } 4950 4951 /* Bootstrap instructions */ 4952 D_INFO("Copying (but not loading) boot instr len %zd\n", 4953 pieces.boot_size); 4954 memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size); 4955 4956 /* 4957 * figure out the offset of chain noise reset and gain commands 4958 * base on the size of standard phy calibration commands table size 4959 */ 4960 il->_4965.phy_calib_chain_noise_reset_cmd = 4961 standard_phy_calibration_size; 4962 il->_4965.phy_calib_chain_noise_gain_cmd = 4963 standard_phy_calibration_size + 1; 4964 4965 /************************************************** 4966 * This is still part of probe() in a sense... 4967 * 4968 * 9. Setup and register with mac80211 and debugfs 4969 **************************************************/ 4970 err = il4965_mac_setup_register(il, max_probe_length); 4971 if (err) 4972 goto out_unbind; 4973 4974 il_dbgfs_register(il, DRV_NAME); 4975 4976 err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group); 4977 if (err) { 4978 IL_ERR("failed to create sysfs device attributes\n"); 4979 goto out_unbind; 4980 } 4981 4982 /* We have our copies now, allow OS release its copies */ 4983 release_firmware(ucode_raw); 4984 complete(&il->_4965.firmware_loading_complete); 4985 return; 4986 4987 try_again: 4988 /* try next, if any */ 4989 if (il4965_request_firmware(il, false)) 4990 goto out_unbind; 4991 release_firmware(ucode_raw); 4992 return; 4993 4994 err_pci_alloc: 4995 IL_ERR("failed to allocate pci memory\n"); 4996 il4965_dealloc_ucode_pci(il); 4997 out_unbind: 4998 complete(&il->_4965.firmware_loading_complete); 4999 device_release_driver(&il->pci_dev->dev); 5000 release_firmware(ucode_raw); 5001 } 5002 5003 static const char *const desc_lookup_text[] = { 5004 "OK", 5005 "FAIL", 5006 "BAD_PARAM", 5007 "BAD_CHECKSUM", 5008 "NMI_INTERRUPT_WDG", 5009 "SYSASSERT", 5010 "FATAL_ERROR", 5011 "BAD_COMMAND", 5012 "HW_ERROR_TUNE_LOCK", 5013 "HW_ERROR_TEMPERATURE", 5014 "ILLEGAL_CHAN_FREQ", 5015 "VCC_NOT_STBL", 5016 "FH49_ERROR", 5017 "NMI_INTERRUPT_HOST", 5018 "NMI_INTERRUPT_ACTION_PT", 5019 "NMI_INTERRUPT_UNKNOWN", 5020 "UCODE_VERSION_MISMATCH", 5021 "HW_ERROR_ABS_LOCK", 5022 "HW_ERROR_CAL_LOCK_FAIL", 5023 "NMI_INTERRUPT_INST_ACTION_PT", 5024 "NMI_INTERRUPT_DATA_ACTION_PT", 5025 "NMI_TRM_HW_ER", 5026 "NMI_INTERRUPT_TRM", 5027 "NMI_INTERRUPT_BREAK_POINT", 5028 "DEBUG_0", 5029 "DEBUG_1", 5030 "DEBUG_2", 5031 "DEBUG_3", 5032 }; 5033 5034 static struct { 5035 char *name; 5036 u8 num; 5037 } advanced_lookup[] = { 5038 { 5039 "NMI_INTERRUPT_WDG", 0x34}, { 5040 "SYSASSERT", 0x35}, { 5041 "UCODE_VERSION_MISMATCH", 0x37}, { 5042 "BAD_COMMAND", 0x38}, { 5043 "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, { 5044 "FATAL_ERROR", 0x3D}, { 5045 "NMI_TRM_HW_ERR", 0x46}, { 5046 "NMI_INTERRUPT_TRM", 0x4C}, { 5047 "NMI_INTERRUPT_BREAK_POINT", 0x54}, { 5048 "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, { 5049 "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, { 5050 "NMI_INTERRUPT_HOST", 0x66}, { 5051 "NMI_INTERRUPT_ACTION_PT", 0x7C}, { 5052 "NMI_INTERRUPT_UNKNOWN", 0x84}, { 5053 "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, { 5054 "ADVANCED_SYSASSERT", 0},}; 5055 5056 static const char * 5057 il4965_desc_lookup(u32 num) 5058 { 5059 int i; 5060 int max = ARRAY_SIZE(desc_lookup_text); 5061 5062 if (num < max) 5063 return desc_lookup_text[num]; 5064 5065 max = ARRAY_SIZE(advanced_lookup) - 1; 5066 for (i = 0; i < max; i++) { 5067 if (advanced_lookup[i].num == num) 5068 break; 5069 } 5070 return advanced_lookup[i].name; 5071 } 5072 5073 #define ERROR_START_OFFSET (1 * sizeof(u32)) 5074 #define ERROR_ELEM_SIZE (7 * sizeof(u32)) 5075 5076 void 5077 il4965_dump_nic_error_log(struct il_priv *il) 5078 { 5079 u32 data2, line; 5080 u32 desc, time, count, base, data1; 5081 u32 blink1, blink2, ilink1, ilink2; 5082 u32 pc, hcmd; 5083 5084 if (il->ucode_type == UCODE_INIT) 5085 base = le32_to_cpu(il->card_alive_init.error_event_table_ptr); 5086 else 5087 base = le32_to_cpu(il->card_alive.error_event_table_ptr); 5088 5089 if (!il->ops->is_valid_rtc_data_addr(base)) { 5090 IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n", 5091 base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT"); 5092 return; 5093 } 5094 5095 count = il_read_targ_mem(il, base); 5096 5097 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { 5098 IL_ERR("Start IWL Error Log Dump:\n"); 5099 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count); 5100 } 5101 5102 desc = il_read_targ_mem(il, base + 1 * sizeof(u32)); 5103 il->isr_stats.err_code = desc; 5104 pc = il_read_targ_mem(il, base + 2 * sizeof(u32)); 5105 blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32)); 5106 blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32)); 5107 ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32)); 5108 ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32)); 5109 data1 = il_read_targ_mem(il, base + 7 * sizeof(u32)); 5110 data2 = il_read_targ_mem(il, base + 8 * sizeof(u32)); 5111 line = il_read_targ_mem(il, base + 9 * sizeof(u32)); 5112 time = il_read_targ_mem(il, base + 11 * sizeof(u32)); 5113 hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32)); 5114 5115 IL_ERR("Desc Time " 5116 "data1 data2 line\n"); 5117 IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n", 5118 il4965_desc_lookup(desc), desc, time, data1, data2, line); 5119 IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n"); 5120 IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1, 5121 blink2, ilink1, ilink2, hcmd); 5122 } 5123 5124 static void 5125 il4965_rf_kill_ct_config(struct il_priv *il) 5126 { 5127 struct il_ct_kill_config cmd; 5128 unsigned long flags; 5129 int ret = 0; 5130 5131 spin_lock_irqsave(&il->lock, flags); 5132 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, 5133 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); 5134 spin_unlock_irqrestore(&il->lock, flags); 5135 5136 cmd.critical_temperature_R = 5137 cpu_to_le32(il->hw_params.ct_kill_threshold); 5138 5139 ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd); 5140 if (ret) 5141 IL_ERR("C_CT_KILL_CONFIG failed\n"); 5142 else 5143 D_INFO("C_CT_KILL_CONFIG " "succeeded, " 5144 "critical temperature is %d\n", 5145 il->hw_params.ct_kill_threshold); 5146 } 5147 5148 static const s8 default_queue_to_tx_fifo[] = { 5149 IL_TX_FIFO_VO, 5150 IL_TX_FIFO_VI, 5151 IL_TX_FIFO_BE, 5152 IL_TX_FIFO_BK, 5153 IL49_CMD_FIFO_NUM, 5154 IL_TX_FIFO_UNUSED, 5155 IL_TX_FIFO_UNUSED, 5156 }; 5157 5158 #define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) 5159 5160 static int 5161 il4965_alive_notify(struct il_priv *il) 5162 { 5163 u32 a; 5164 unsigned long flags; 5165 int i, chan; 5166 u32 reg_val; 5167 5168 spin_lock_irqsave(&il->lock, flags); 5169 5170 /* Clear 4965's internal Tx Scheduler data base */ 5171 il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR); 5172 a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET; 5173 for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4) 5174 il_write_targ_mem(il, a, 0); 5175 for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4) 5176 il_write_targ_mem(il, a, 0); 5177 for (; 5178 a < 5179 il->scd_base_addr + 5180 IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num); 5181 a += 4) 5182 il_write_targ_mem(il, a, 0); 5183 5184 /* Tel 4965 where to find Tx byte count tables */ 5185 il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10); 5186 5187 /* Enable DMA channel */ 5188 for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++) 5189 il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan), 5190 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | 5191 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); 5192 5193 /* Update FH chicken bits */ 5194 reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG); 5195 il_wr(il, FH49_TX_CHICKEN_BITS_REG, 5196 reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); 5197 5198 /* Disable chain mode for all queues */ 5199 il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0); 5200 5201 /* Initialize each Tx queue (including the command queue) */ 5202 for (i = 0; i < il->hw_params.max_txq_num; i++) { 5203 5204 /* TFD circular buffer read/write idxes */ 5205 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0); 5206 il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8)); 5207 5208 /* Max Tx Window size for Scheduler-ACK mode */ 5209 il_write_targ_mem(il, 5210 il->scd_base_addr + 5211 IL49_SCD_CONTEXT_QUEUE_OFFSET(i), 5212 (SCD_WIN_SIZE << 5213 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & 5214 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); 5215 5216 /* Frame limit */ 5217 il_write_targ_mem(il, 5218 il->scd_base_addr + 5219 IL49_SCD_CONTEXT_QUEUE_OFFSET(i) + 5220 sizeof(u32), 5221 (SCD_FRAME_LIMIT << 5222 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & 5223 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); 5224 5225 } 5226 il_wr_prph(il, IL49_SCD_INTERRUPT_MASK, 5227 (1 << il->hw_params.max_txq_num) - 1); 5228 5229 /* Activate all Tx DMA/FIFO channels */ 5230 il4965_txq_set_sched(il, IL_MASK(0, 6)); 5231 5232 il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0); 5233 5234 /* make sure all queue are not stopped */ 5235 memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped)); 5236 for (i = 0; i < 4; i++) 5237 atomic_set(&il->queue_stop_count[i], 0); 5238 5239 /* reset to 0 to enable all the queue first */ 5240 il->txq_ctx_active_msk = 0; 5241 /* Map each Tx/cmd queue to its corresponding fifo */ 5242 BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7); 5243 5244 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) { 5245 int ac = default_queue_to_tx_fifo[i]; 5246 5247 il_txq_ctx_activate(il, i); 5248 5249 if (ac == IL_TX_FIFO_UNUSED) 5250 continue; 5251 5252 il4965_tx_queue_set_status(il, &il->txq[i], ac, 0); 5253 } 5254 5255 spin_unlock_irqrestore(&il->lock, flags); 5256 5257 return 0; 5258 } 5259 5260 /** 5261 * il4965_alive_start - called after N_ALIVE notification received 5262 * from protocol/runtime uCode (initialization uCode's 5263 * Alive gets handled by il_init_alive_start()). 5264 */ 5265 static void 5266 il4965_alive_start(struct il_priv *il) 5267 { 5268 int ret = 0; 5269 5270 D_INFO("Runtime Alive received.\n"); 5271 5272 if (il->card_alive.is_valid != UCODE_VALID_OK) { 5273 /* We had an error bringing up the hardware, so take it 5274 * all the way back down so we can try again */ 5275 D_INFO("Alive failed.\n"); 5276 goto restart; 5277 } 5278 5279 /* Initialize uCode has loaded Runtime uCode ... verify inst image. 5280 * This is a paranoid check, because we would not have gotten the 5281 * "runtime" alive if code weren't properly loaded. */ 5282 if (il4965_verify_ucode(il)) { 5283 /* Runtime instruction load was bad; 5284 * take it all the way back down so we can try again */ 5285 D_INFO("Bad runtime uCode load.\n"); 5286 goto restart; 5287 } 5288 5289 ret = il4965_alive_notify(il); 5290 if (ret) { 5291 IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret); 5292 goto restart; 5293 } 5294 5295 /* After the ALIVE response, we can send host commands to the uCode */ 5296 set_bit(S_ALIVE, &il->status); 5297 5298 /* Enable watchdog to monitor the driver tx queues */ 5299 il_setup_watchdog(il); 5300 5301 if (il_is_rfkill(il)) 5302 return; 5303 5304 ieee80211_wake_queues(il->hw); 5305 5306 il->active_rate = RATES_MASK; 5307 5308 il_power_update_mode(il, true); 5309 D_INFO("Updated power mode\n"); 5310 5311 if (il_is_associated(il)) { 5312 struct il_rxon_cmd *active_rxon = 5313 (struct il_rxon_cmd *)&il->active; 5314 /* apply any changes in staging */ 5315 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; 5316 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; 5317 } else { 5318 /* Initialize our rx_config data */ 5319 il_connection_init_rx_config(il); 5320 5321 if (il->ops->set_rxon_chain) 5322 il->ops->set_rxon_chain(il); 5323 } 5324 5325 /* Configure bluetooth coexistence if enabled */ 5326 il_send_bt_config(il); 5327 5328 il4965_reset_run_time_calib(il); 5329 5330 set_bit(S_READY, &il->status); 5331 5332 /* Configure the adapter for unassociated operation */ 5333 il_commit_rxon(il); 5334 5335 /* At this point, the NIC is initialized and operational */ 5336 il4965_rf_kill_ct_config(il); 5337 5338 D_INFO("ALIVE processing complete.\n"); 5339 wake_up(&il->wait_command_queue); 5340 5341 return; 5342 5343 restart: 5344 queue_work(il->workqueue, &il->restart); 5345 } 5346 5347 static void il4965_cancel_deferred_work(struct il_priv *il); 5348 5349 static void 5350 __il4965_down(struct il_priv *il) 5351 { 5352 unsigned long flags; 5353 int exit_pending; 5354 5355 D_INFO(DRV_NAME " is going down\n"); 5356 5357 il_scan_cancel_timeout(il, 200); 5358 5359 exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status); 5360 5361 /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set 5362 * to prevent rearm timer */ 5363 del_timer_sync(&il->watchdog); 5364 5365 il_clear_ucode_stations(il); 5366 5367 /* FIXME: race conditions ? */ 5368 spin_lock_irq(&il->sta_lock); 5369 /* 5370 * Remove all key information that is not stored as part 5371 * of station information since mac80211 may not have had 5372 * a chance to remove all the keys. When device is 5373 * reconfigured by mac80211 after an error all keys will 5374 * be reconfigured. 5375 */ 5376 memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys)); 5377 il->_4965.key_mapping_keys = 0; 5378 spin_unlock_irq(&il->sta_lock); 5379 5380 il_dealloc_bcast_stations(il); 5381 il_clear_driver_stations(il); 5382 5383 /* Unblock any waiting calls */ 5384 wake_up_all(&il->wait_command_queue); 5385 5386 /* Wipe out the EXIT_PENDING status bit if we are not actually 5387 * exiting the module */ 5388 if (!exit_pending) 5389 clear_bit(S_EXIT_PENDING, &il->status); 5390 5391 /* stop and reset the on-board processor */ 5392 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); 5393 5394 /* tell the device to stop sending interrupts */ 5395 spin_lock_irqsave(&il->lock, flags); 5396 il_disable_interrupts(il); 5397 spin_unlock_irqrestore(&il->lock, flags); 5398 il4965_synchronize_irq(il); 5399 5400 if (il->mac80211_registered) 5401 ieee80211_stop_queues(il->hw); 5402 5403 /* If we have not previously called il_init() then 5404 * clear all bits but the RF Kill bit and return */ 5405 if (!il_is_init(il)) { 5406 il->status = 5407 test_bit(S_RFKILL, &il->status) << S_RFKILL | 5408 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | 5409 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; 5410 goto exit; 5411 } 5412 5413 /* ...otherwise clear out all the status bits but the RF Kill 5414 * bit and continue taking the NIC down. */ 5415 il->status &= 5416 test_bit(S_RFKILL, &il->status) << S_RFKILL | 5417 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | 5418 test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR | 5419 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; 5420 5421 /* 5422 * We disabled and synchronized interrupt, and priv->mutex is taken, so 5423 * here is the only thread which will program device registers, but 5424 * still have lockdep assertions, so we are taking reg_lock. 5425 */ 5426 spin_lock_irq(&il->reg_lock); 5427 /* FIXME: il_grab_nic_access if rfkill is off ? */ 5428 5429 il4965_txq_ctx_stop(il); 5430 il4965_rxq_stop(il); 5431 /* Power-down device's busmaster DMA clocks */ 5432 _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); 5433 udelay(5); 5434 /* Make sure (redundant) we've released our request to stay awake */ 5435 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 5436 /* Stop the device, and put it in low power state */ 5437 _il_apm_stop(il); 5438 5439 spin_unlock_irq(&il->reg_lock); 5440 5441 il4965_txq_ctx_unmap(il); 5442 exit: 5443 memset(&il->card_alive, 0, sizeof(struct il_alive_resp)); 5444 5445 dev_kfree_skb(il->beacon_skb); 5446 il->beacon_skb = NULL; 5447 5448 /* clear out any free frames */ 5449 il4965_clear_free_frames(il); 5450 } 5451 5452 static void 5453 il4965_down(struct il_priv *il) 5454 { 5455 mutex_lock(&il->mutex); 5456 __il4965_down(il); 5457 mutex_unlock(&il->mutex); 5458 5459 il4965_cancel_deferred_work(il); 5460 } 5461 5462 5463 static void 5464 il4965_set_hw_ready(struct il_priv *il) 5465 { 5466 int ret; 5467 5468 il_set_bit(il, CSR_HW_IF_CONFIG_REG, 5469 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); 5470 5471 /* See if we got it */ 5472 ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, 5473 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 5474 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 5475 100); 5476 if (ret >= 0) 5477 il->hw_ready = true; 5478 5479 D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not"); 5480 } 5481 5482 static void 5483 il4965_prepare_card_hw(struct il_priv *il) 5484 { 5485 int ret; 5486 5487 il->hw_ready = false; 5488 5489 il4965_set_hw_ready(il); 5490 if (il->hw_ready) 5491 return; 5492 5493 /* If HW is not ready, prepare the conditions to check again */ 5494 il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE); 5495 5496 ret = 5497 _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, 5498 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 5499 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000); 5500 5501 /* HW should be ready by now, check again. */ 5502 if (ret != -ETIMEDOUT) 5503 il4965_set_hw_ready(il); 5504 } 5505 5506 #define MAX_HW_RESTARTS 5 5507 5508 static int 5509 __il4965_up(struct il_priv *il) 5510 { 5511 int i; 5512 int ret; 5513 5514 if (test_bit(S_EXIT_PENDING, &il->status)) { 5515 IL_WARN("Exit pending; will not bring the NIC up\n"); 5516 return -EIO; 5517 } 5518 5519 if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) { 5520 IL_ERR("ucode not available for device bringup\n"); 5521 return -EIO; 5522 } 5523 5524 ret = il4965_alloc_bcast_station(il); 5525 if (ret) { 5526 il_dealloc_bcast_stations(il); 5527 return ret; 5528 } 5529 5530 il4965_prepare_card_hw(il); 5531 if (!il->hw_ready) { 5532 il_dealloc_bcast_stations(il); 5533 IL_ERR("HW not ready\n"); 5534 return -EIO; 5535 } 5536 5537 /* If platform's RF_KILL switch is NOT set to KILL */ 5538 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) 5539 clear_bit(S_RFKILL, &il->status); 5540 else { 5541 set_bit(S_RFKILL, &il->status); 5542 wiphy_rfkill_set_hw_state(il->hw->wiphy, true); 5543 5544 il_dealloc_bcast_stations(il); 5545 il_enable_rfkill_int(il); 5546 IL_WARN("Radio disabled by HW RF Kill switch\n"); 5547 return 0; 5548 } 5549 5550 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5551 5552 /* must be initialised before il_hw_nic_init */ 5553 il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM; 5554 5555 ret = il4965_hw_nic_init(il); 5556 if (ret) { 5557 IL_ERR("Unable to init nic\n"); 5558 il_dealloc_bcast_stations(il); 5559 return ret; 5560 } 5561 5562 /* make sure rfkill handshake bits are cleared */ 5563 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5564 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 5565 5566 /* clear (again), then enable host interrupts */ 5567 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5568 il_enable_interrupts(il); 5569 5570 /* really make sure rfkill handshake bits are cleared */ 5571 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5572 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5573 5574 /* Copy original ucode data image from disk into backup cache. 5575 * This will be used to initialize the on-board processor's 5576 * data SRAM for a clean start when the runtime program first loads. */ 5577 memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr, 5578 il->ucode_data.len); 5579 5580 for (i = 0; i < MAX_HW_RESTARTS; i++) { 5581 5582 /* load bootstrap state machine, 5583 * load bootstrap program into processor's memory, 5584 * prepare to load the "initialize" uCode */ 5585 ret = il->ops->load_ucode(il); 5586 5587 if (ret) { 5588 IL_ERR("Unable to set up bootstrap uCode: %d\n", ret); 5589 continue; 5590 } 5591 5592 /* start card; "initialize" will load runtime ucode */ 5593 il4965_nic_start(il); 5594 5595 D_INFO(DRV_NAME " is coming up\n"); 5596 5597 return 0; 5598 } 5599 5600 set_bit(S_EXIT_PENDING, &il->status); 5601 __il4965_down(il); 5602 clear_bit(S_EXIT_PENDING, &il->status); 5603 5604 /* tried to restart and config the device for as long as our 5605 * patience could withstand */ 5606 IL_ERR("Unable to initialize device after %d attempts.\n", i); 5607 return -EIO; 5608 } 5609 5610 /***************************************************************************** 5611 * 5612 * Workqueue callbacks 5613 * 5614 *****************************************************************************/ 5615 5616 static void 5617 il4965_bg_init_alive_start(struct work_struct *data) 5618 { 5619 struct il_priv *il = 5620 container_of(data, struct il_priv, init_alive_start.work); 5621 5622 mutex_lock(&il->mutex); 5623 if (test_bit(S_EXIT_PENDING, &il->status)) 5624 goto out; 5625 5626 il->ops->init_alive_start(il); 5627 out: 5628 mutex_unlock(&il->mutex); 5629 } 5630 5631 static void 5632 il4965_bg_alive_start(struct work_struct *data) 5633 { 5634 struct il_priv *il = 5635 container_of(data, struct il_priv, alive_start.work); 5636 5637 mutex_lock(&il->mutex); 5638 if (test_bit(S_EXIT_PENDING, &il->status)) 5639 goto out; 5640 5641 il4965_alive_start(il); 5642 out: 5643 mutex_unlock(&il->mutex); 5644 } 5645 5646 static void 5647 il4965_bg_run_time_calib_work(struct work_struct *work) 5648 { 5649 struct il_priv *il = container_of(work, struct il_priv, 5650 run_time_calib_work); 5651 5652 mutex_lock(&il->mutex); 5653 5654 if (test_bit(S_EXIT_PENDING, &il->status) || 5655 test_bit(S_SCANNING, &il->status)) { 5656 mutex_unlock(&il->mutex); 5657 return; 5658 } 5659 5660 if (il->start_calib) { 5661 il4965_chain_noise_calibration(il, (void *)&il->_4965.stats); 5662 il4965_sensitivity_calibration(il, (void *)&il->_4965.stats); 5663 } 5664 5665 mutex_unlock(&il->mutex); 5666 } 5667 5668 static void 5669 il4965_bg_restart(struct work_struct *data) 5670 { 5671 struct il_priv *il = container_of(data, struct il_priv, restart); 5672 5673 if (test_bit(S_EXIT_PENDING, &il->status)) 5674 return; 5675 5676 if (test_and_clear_bit(S_FW_ERROR, &il->status)) { 5677 mutex_lock(&il->mutex); 5678 il->is_open = 0; 5679 5680 __il4965_down(il); 5681 5682 mutex_unlock(&il->mutex); 5683 il4965_cancel_deferred_work(il); 5684 ieee80211_restart_hw(il->hw); 5685 } else { 5686 il4965_down(il); 5687 5688 mutex_lock(&il->mutex); 5689 if (test_bit(S_EXIT_PENDING, &il->status)) { 5690 mutex_unlock(&il->mutex); 5691 return; 5692 } 5693 5694 __il4965_up(il); 5695 mutex_unlock(&il->mutex); 5696 } 5697 } 5698 5699 static void 5700 il4965_bg_rx_replenish(struct work_struct *data) 5701 { 5702 struct il_priv *il = container_of(data, struct il_priv, rx_replenish); 5703 5704 if (test_bit(S_EXIT_PENDING, &il->status)) 5705 return; 5706 5707 mutex_lock(&il->mutex); 5708 il4965_rx_replenish(il); 5709 mutex_unlock(&il->mutex); 5710 } 5711 5712 /***************************************************************************** 5713 * 5714 * mac80211 entry point functions 5715 * 5716 *****************************************************************************/ 5717 5718 #define UCODE_READY_TIMEOUT (4 * HZ) 5719 5720 /* 5721 * Not a mac80211 entry point function, but it fits in with all the 5722 * other mac80211 functions grouped here. 5723 */ 5724 static int 5725 il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length) 5726 { 5727 int ret; 5728 struct ieee80211_hw *hw = il->hw; 5729 5730 hw->rate_control_algorithm = "iwl-4965-rs"; 5731 5732 /* Tell mac80211 our characteristics */ 5733 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 5734 ieee80211_hw_set(hw, SUPPORTS_PS); 5735 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 5736 ieee80211_hw_set(hw, SPECTRUM_MGMT); 5737 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 5738 ieee80211_hw_set(hw, SIGNAL_DBM); 5739 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 5740 if (il->cfg->sku & IL_SKU_N) 5741 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 5742 NL80211_FEATURE_STATIC_SMPS; 5743 5744 hw->sta_data_size = sizeof(struct il_station_priv); 5745 hw->vif_data_size = sizeof(struct il_vif_priv); 5746 5747 hw->wiphy->interface_modes = 5748 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); 5749 5750 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 5751 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 5752 REGULATORY_DISABLE_BEACON_HINTS; 5753 5754 /* 5755 * For now, disable PS by default because it affects 5756 * RX performance significantly. 5757 */ 5758 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 5759 5760 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 5761 /* we create the 802.11 header and a zero-length SSID element */ 5762 hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2; 5763 5764 /* Default value; 4 EDCA QOS priorities */ 5765 hw->queues = 4; 5766 5767 hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL; 5768 5769 if (il->bands[NL80211_BAND_2GHZ].n_channels) 5770 il->hw->wiphy->bands[NL80211_BAND_2GHZ] = 5771 &il->bands[NL80211_BAND_2GHZ]; 5772 if (il->bands[NL80211_BAND_5GHZ].n_channels) 5773 il->hw->wiphy->bands[NL80211_BAND_5GHZ] = 5774 &il->bands[NL80211_BAND_5GHZ]; 5775 5776 il_leds_init(il); 5777 5778 wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 5779 5780 ret = ieee80211_register_hw(il->hw); 5781 if (ret) { 5782 IL_ERR("Failed to register hw (error %d)\n", ret); 5783 return ret; 5784 } 5785 il->mac80211_registered = 1; 5786 5787 return 0; 5788 } 5789 5790 int 5791 il4965_mac_start(struct ieee80211_hw *hw) 5792 { 5793 struct il_priv *il = hw->priv; 5794 int ret; 5795 5796 D_MAC80211("enter\n"); 5797 5798 /* we should be verifying the device is ready to be opened */ 5799 mutex_lock(&il->mutex); 5800 ret = __il4965_up(il); 5801 mutex_unlock(&il->mutex); 5802 5803 if (ret) 5804 return ret; 5805 5806 if (il_is_rfkill(il)) 5807 goto out; 5808 5809 D_INFO("Start UP work done.\n"); 5810 5811 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from 5812 * mac80211 will not be run successfully. */ 5813 ret = wait_event_timeout(il->wait_command_queue, 5814 test_bit(S_READY, &il->status), 5815 UCODE_READY_TIMEOUT); 5816 if (!ret) { 5817 if (!test_bit(S_READY, &il->status)) { 5818 IL_ERR("START_ALIVE timeout after %dms.\n", 5819 jiffies_to_msecs(UCODE_READY_TIMEOUT)); 5820 return -ETIMEDOUT; 5821 } 5822 } 5823 5824 il4965_led_enable(il); 5825 5826 out: 5827 il->is_open = 1; 5828 D_MAC80211("leave\n"); 5829 return 0; 5830 } 5831 5832 void 5833 il4965_mac_stop(struct ieee80211_hw *hw) 5834 { 5835 struct il_priv *il = hw->priv; 5836 5837 D_MAC80211("enter\n"); 5838 5839 if (!il->is_open) 5840 return; 5841 5842 il->is_open = 0; 5843 5844 il4965_down(il); 5845 5846 flush_workqueue(il->workqueue); 5847 5848 /* User space software may expect getting rfkill changes 5849 * even if interface is down */ 5850 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5851 il_enable_rfkill_int(il); 5852 5853 D_MAC80211("leave\n"); 5854 } 5855 5856 void 5857 il4965_mac_tx(struct ieee80211_hw *hw, 5858 struct ieee80211_tx_control *control, 5859 struct sk_buff *skb) 5860 { 5861 struct il_priv *il = hw->priv; 5862 5863 D_MACDUMP("enter\n"); 5864 5865 D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, 5866 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); 5867 5868 if (il4965_tx_skb(il, control->sta, skb)) 5869 dev_kfree_skb_any(skb); 5870 5871 D_MACDUMP("leave\n"); 5872 } 5873 5874 void 5875 il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 5876 struct ieee80211_key_conf *keyconf, 5877 struct ieee80211_sta *sta, u32 iv32, u16 * phase1key) 5878 { 5879 struct il_priv *il = hw->priv; 5880 5881 D_MAC80211("enter\n"); 5882 5883 il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key); 5884 5885 D_MAC80211("leave\n"); 5886 } 5887 5888 int 5889 il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 5890 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 5891 struct ieee80211_key_conf *key) 5892 { 5893 struct il_priv *il = hw->priv; 5894 int ret; 5895 u8 sta_id; 5896 bool is_default_wep_key = false; 5897 5898 D_MAC80211("enter\n"); 5899 5900 if (il->cfg->mod_params->sw_crypto) { 5901 D_MAC80211("leave - hwcrypto disabled\n"); 5902 return -EOPNOTSUPP; 5903 } 5904 5905 /* 5906 * To support IBSS RSN, don't program group keys in IBSS, the 5907 * hardware will then not attempt to decrypt the frames. 5908 */ 5909 if (vif->type == NL80211_IFTYPE_ADHOC && 5910 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 5911 D_MAC80211("leave - ad-hoc group key\n"); 5912 return -EOPNOTSUPP; 5913 } 5914 5915 sta_id = il_sta_id_or_broadcast(il, sta); 5916 if (sta_id == IL_INVALID_STATION) 5917 return -EINVAL; 5918 5919 mutex_lock(&il->mutex); 5920 il_scan_cancel_timeout(il, 100); 5921 5922 /* 5923 * If we are getting WEP group key and we didn't receive any key mapping 5924 * so far, we are in legacy wep mode (group key only), otherwise we are 5925 * in 1X mode. 5926 * In legacy wep mode, we use another host command to the uCode. 5927 */ 5928 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 5929 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 5930 if (cmd == SET_KEY) 5931 is_default_wep_key = !il->_4965.key_mapping_keys; 5932 else 5933 is_default_wep_key = 5934 (key->hw_key_idx == HW_KEY_DEFAULT); 5935 } 5936 5937 switch (cmd) { 5938 case SET_KEY: 5939 if (is_default_wep_key) 5940 ret = il4965_set_default_wep_key(il, key); 5941 else 5942 ret = il4965_set_dynamic_key(il, key, sta_id); 5943 5944 D_MAC80211("enable hwcrypto key\n"); 5945 break; 5946 case DISABLE_KEY: 5947 if (is_default_wep_key) 5948 ret = il4965_remove_default_wep_key(il, key); 5949 else 5950 ret = il4965_remove_dynamic_key(il, key, sta_id); 5951 5952 D_MAC80211("disable hwcrypto key\n"); 5953 break; 5954 default: 5955 ret = -EINVAL; 5956 } 5957 5958 mutex_unlock(&il->mutex); 5959 D_MAC80211("leave\n"); 5960 5961 return ret; 5962 } 5963 5964 int 5965 il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 5966 struct ieee80211_ampdu_params *params) 5967 { 5968 struct il_priv *il = hw->priv; 5969 int ret = -EINVAL; 5970 struct ieee80211_sta *sta = params->sta; 5971 enum ieee80211_ampdu_mlme_action action = params->action; 5972 u16 tid = params->tid; 5973 u16 *ssn = ¶ms->ssn; 5974 5975 D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid); 5976 5977 if (!(il->cfg->sku & IL_SKU_N)) 5978 return -EACCES; 5979 5980 mutex_lock(&il->mutex); 5981 5982 switch (action) { 5983 case IEEE80211_AMPDU_RX_START: 5984 D_HT("start Rx\n"); 5985 ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn); 5986 break; 5987 case IEEE80211_AMPDU_RX_STOP: 5988 D_HT("stop Rx\n"); 5989 ret = il4965_sta_rx_agg_stop(il, sta, tid); 5990 if (test_bit(S_EXIT_PENDING, &il->status)) 5991 ret = 0; 5992 break; 5993 case IEEE80211_AMPDU_TX_START: 5994 D_HT("start Tx\n"); 5995 ret = il4965_tx_agg_start(il, vif, sta, tid, ssn); 5996 break; 5997 case IEEE80211_AMPDU_TX_STOP_CONT: 5998 case IEEE80211_AMPDU_TX_STOP_FLUSH: 5999 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 6000 D_HT("stop Tx\n"); 6001 ret = il4965_tx_agg_stop(il, vif, sta, tid); 6002 if (test_bit(S_EXIT_PENDING, &il->status)) 6003 ret = 0; 6004 break; 6005 case IEEE80211_AMPDU_TX_OPERATIONAL: 6006 ret = 0; 6007 break; 6008 } 6009 mutex_unlock(&il->mutex); 6010 6011 return ret; 6012 } 6013 6014 int 6015 il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 6016 struct ieee80211_sta *sta) 6017 { 6018 struct il_priv *il = hw->priv; 6019 struct il_station_priv *sta_priv = (void *)sta->drv_priv; 6020 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 6021 int ret; 6022 u8 sta_id; 6023 6024 D_INFO("received request to add station %pM\n", sta->addr); 6025 mutex_lock(&il->mutex); 6026 D_INFO("proceeding to add station %pM\n", sta->addr); 6027 sta_priv->common.sta_id = IL_INVALID_STATION; 6028 6029 atomic_set(&sta_priv->pending_frames, 0); 6030 6031 ret = 6032 il_add_station_common(il, sta->addr, is_ap, sta, &sta_id); 6033 if (ret) { 6034 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret); 6035 /* Should we return success if return code is EEXIST ? */ 6036 mutex_unlock(&il->mutex); 6037 return ret; 6038 } 6039 6040 sta_priv->common.sta_id = sta_id; 6041 6042 /* Initialize rate scaling */ 6043 D_INFO("Initializing rate scaling for station %pM\n", sta->addr); 6044 il4965_rs_rate_init(il, sta, sta_id); 6045 mutex_unlock(&il->mutex); 6046 6047 return 0; 6048 } 6049 6050 void 6051 il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 6052 struct ieee80211_channel_switch *ch_switch) 6053 { 6054 struct il_priv *il = hw->priv; 6055 const struct il_channel_info *ch_info; 6056 struct ieee80211_conf *conf = &hw->conf; 6057 struct ieee80211_channel *channel = ch_switch->chandef.chan; 6058 struct il_ht_config *ht_conf = &il->current_ht_config; 6059 u16 ch; 6060 6061 D_MAC80211("enter\n"); 6062 6063 mutex_lock(&il->mutex); 6064 6065 if (il_is_rfkill(il)) 6066 goto out; 6067 6068 if (test_bit(S_EXIT_PENDING, &il->status) || 6069 test_bit(S_SCANNING, &il->status) || 6070 test_bit(S_CHANNEL_SWITCH_PENDING, &il->status)) 6071 goto out; 6072 6073 if (!il_is_associated(il)) 6074 goto out; 6075 6076 if (!il->ops->set_channel_switch) 6077 goto out; 6078 6079 ch = channel->hw_value; 6080 if (le16_to_cpu(il->active.channel) == ch) 6081 goto out; 6082 6083 ch_info = il_get_channel_info(il, channel->band, ch); 6084 if (!il_is_channel_valid(ch_info)) { 6085 D_MAC80211("invalid channel\n"); 6086 goto out; 6087 } 6088 6089 spin_lock_irq(&il->lock); 6090 6091 il->current_ht_config.smps = conf->smps_mode; 6092 6093 /* Configure HT40 channels */ 6094 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 6095 case NL80211_CHAN_NO_HT: 6096 case NL80211_CHAN_HT20: 6097 il->ht.is_40mhz = false; 6098 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 6099 break; 6100 case NL80211_CHAN_HT40MINUS: 6101 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 6102 il->ht.is_40mhz = true; 6103 break; 6104 case NL80211_CHAN_HT40PLUS: 6105 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 6106 il->ht.is_40mhz = true; 6107 break; 6108 } 6109 6110 if ((le16_to_cpu(il->staging.channel) != ch)) 6111 il->staging.flags = 0; 6112 6113 il_set_rxon_channel(il, channel); 6114 il_set_rxon_ht(il, ht_conf); 6115 il_set_flags_for_band(il, channel->band, il->vif); 6116 6117 spin_unlock_irq(&il->lock); 6118 6119 il_set_rate(il); 6120 /* 6121 * at this point, staging_rxon has the 6122 * configuration for channel switch 6123 */ 6124 set_bit(S_CHANNEL_SWITCH_PENDING, &il->status); 6125 il->switch_channel = cpu_to_le16(ch); 6126 if (il->ops->set_channel_switch(il, ch_switch)) { 6127 clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status); 6128 il->switch_channel = 0; 6129 ieee80211_chswitch_done(il->vif, false); 6130 } 6131 6132 out: 6133 mutex_unlock(&il->mutex); 6134 D_MAC80211("leave\n"); 6135 } 6136 6137 void 6138 il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, 6139 unsigned int *total_flags, u64 multicast) 6140 { 6141 struct il_priv *il = hw->priv; 6142 __le32 filter_or = 0, filter_nand = 0; 6143 6144 #define CHK(test, flag) do { \ 6145 if (*total_flags & (test)) \ 6146 filter_or |= (flag); \ 6147 else \ 6148 filter_nand |= (flag); \ 6149 } while (0) 6150 6151 D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags, 6152 *total_flags); 6153 6154 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 6155 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 6156 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 6157 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 6158 6159 #undef CHK 6160 6161 mutex_lock(&il->mutex); 6162 6163 il->staging.filter_flags &= ~filter_nand; 6164 il->staging.filter_flags |= filter_or; 6165 6166 /* 6167 * Not committing directly because hardware can perform a scan, 6168 * but we'll eventually commit the filter flags change anyway. 6169 */ 6170 6171 mutex_unlock(&il->mutex); 6172 6173 /* 6174 * Receiving all multicast frames is always enabled by the 6175 * default flags setup in il_connection_init_rx_config() 6176 * since we currently do not support programming multicast 6177 * filters into the device. 6178 */ 6179 *total_flags &= 6180 FIF_OTHER_BSS | FIF_ALLMULTI | 6181 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 6182 } 6183 6184 /***************************************************************************** 6185 * 6186 * driver setup and teardown 6187 * 6188 *****************************************************************************/ 6189 6190 static void 6191 il4965_bg_txpower_work(struct work_struct *work) 6192 { 6193 struct il_priv *il = container_of(work, struct il_priv, 6194 txpower_work); 6195 6196 mutex_lock(&il->mutex); 6197 6198 /* If a scan happened to start before we got here 6199 * then just return; the stats notification will 6200 * kick off another scheduled work to compensate for 6201 * any temperature delta we missed here. */ 6202 if (test_bit(S_EXIT_PENDING, &il->status) || 6203 test_bit(S_SCANNING, &il->status)) 6204 goto out; 6205 6206 /* Regardless of if we are associated, we must reconfigure the 6207 * TX power since frames can be sent on non-radar channels while 6208 * not associated */ 6209 il->ops->send_tx_power(il); 6210 6211 /* Update last_temperature to keep is_calib_needed from running 6212 * when it isn't needed... */ 6213 il->last_temperature = il->temperature; 6214 out: 6215 mutex_unlock(&il->mutex); 6216 } 6217 6218 static void 6219 il4965_setup_deferred_work(struct il_priv *il) 6220 { 6221 il->workqueue = create_singlethread_workqueue(DRV_NAME); 6222 6223 init_waitqueue_head(&il->wait_command_queue); 6224 6225 INIT_WORK(&il->restart, il4965_bg_restart); 6226 INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish); 6227 INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work); 6228 INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start); 6229 INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start); 6230 6231 il_setup_scan_deferred_work(il); 6232 6233 INIT_WORK(&il->txpower_work, il4965_bg_txpower_work); 6234 6235 timer_setup(&il->stats_periodic, il4965_bg_stats_periodic, 0); 6236 6237 timer_setup(&il->watchdog, il_bg_watchdog, 0); 6238 6239 tasklet_init(&il->irq_tasklet, 6240 (void (*)(unsigned long))il4965_irq_tasklet, 6241 (unsigned long)il); 6242 } 6243 6244 static void 6245 il4965_cancel_deferred_work(struct il_priv *il) 6246 { 6247 cancel_work_sync(&il->txpower_work); 6248 cancel_delayed_work_sync(&il->init_alive_start); 6249 cancel_delayed_work(&il->alive_start); 6250 cancel_work_sync(&il->run_time_calib_work); 6251 6252 il_cancel_scan_deferred_work(il); 6253 6254 del_timer_sync(&il->stats_periodic); 6255 } 6256 6257 static void 6258 il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates) 6259 { 6260 int i; 6261 6262 for (i = 0; i < RATE_COUNT_LEGACY; i++) { 6263 rates[i].bitrate = il_rates[i].ieee * 5; 6264 rates[i].hw_value = i; /* Rate scaling will work on idxes */ 6265 rates[i].hw_value_short = i; 6266 rates[i].flags = 0; 6267 if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) { 6268 /* 6269 * If CCK != 1M then set short preamble rate flag. 6270 */ 6271 rates[i].flags |= 6272 (il_rates[i].plcp == 6273 RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; 6274 } 6275 } 6276 } 6277 6278 /* 6279 * Acquire il->lock before calling this function ! 6280 */ 6281 void 6282 il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx) 6283 { 6284 il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8)); 6285 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx); 6286 } 6287 6288 void 6289 il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq, 6290 int tx_fifo_id, int scd_retry) 6291 { 6292 int txq_id = txq->q.id; 6293 6294 /* Find out whether to activate Tx queue */ 6295 int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0; 6296 6297 /* Set up and activate */ 6298 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), 6299 (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | 6300 (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) | 6301 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) | 6302 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) | 6303 IL49_SCD_QUEUE_STTS_REG_MSK); 6304 6305 txq->sched_retry = scd_retry; 6306 6307 D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate", 6308 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id); 6309 } 6310 6311 static const struct ieee80211_ops il4965_mac_ops = { 6312 .tx = il4965_mac_tx, 6313 .start = il4965_mac_start, 6314 .stop = il4965_mac_stop, 6315 .add_interface = il_mac_add_interface, 6316 .remove_interface = il_mac_remove_interface, 6317 .change_interface = il_mac_change_interface, 6318 .config = il_mac_config, 6319 .configure_filter = il4965_configure_filter, 6320 .set_key = il4965_mac_set_key, 6321 .update_tkip_key = il4965_mac_update_tkip_key, 6322 .conf_tx = il_mac_conf_tx, 6323 .reset_tsf = il_mac_reset_tsf, 6324 .bss_info_changed = il_mac_bss_info_changed, 6325 .ampdu_action = il4965_mac_ampdu_action, 6326 .hw_scan = il_mac_hw_scan, 6327 .sta_add = il4965_mac_sta_add, 6328 .sta_remove = il_mac_sta_remove, 6329 .channel_switch = il4965_mac_channel_switch, 6330 .tx_last_beacon = il_mac_tx_last_beacon, 6331 .flush = il_mac_flush, 6332 }; 6333 6334 static int 6335 il4965_init_drv(struct il_priv *il) 6336 { 6337 int ret; 6338 6339 spin_lock_init(&il->sta_lock); 6340 spin_lock_init(&il->hcmd_lock); 6341 6342 INIT_LIST_HEAD(&il->free_frames); 6343 6344 mutex_init(&il->mutex); 6345 6346 il->ieee_channels = NULL; 6347 il->ieee_rates = NULL; 6348 il->band = NL80211_BAND_2GHZ; 6349 6350 il->iw_mode = NL80211_IFTYPE_STATION; 6351 il->current_ht_config.smps = IEEE80211_SMPS_STATIC; 6352 il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF; 6353 6354 /* initialize force reset */ 6355 il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD; 6356 6357 /* Choose which receivers/antennas to use */ 6358 if (il->ops->set_rxon_chain) 6359 il->ops->set_rxon_chain(il); 6360 6361 il_init_scan_params(il); 6362 6363 ret = il_init_channel_map(il); 6364 if (ret) { 6365 IL_ERR("initializing regulatory failed: %d\n", ret); 6366 goto err; 6367 } 6368 6369 ret = il_init_geos(il); 6370 if (ret) { 6371 IL_ERR("initializing geos failed: %d\n", ret); 6372 goto err_free_channel_map; 6373 } 6374 il4965_init_hw_rates(il, il->ieee_rates); 6375 6376 return 0; 6377 6378 err_free_channel_map: 6379 il_free_channel_map(il); 6380 err: 6381 return ret; 6382 } 6383 6384 static void 6385 il4965_uninit_drv(struct il_priv *il) 6386 { 6387 il_free_geos(il); 6388 il_free_channel_map(il); 6389 kfree(il->scan_cmd); 6390 } 6391 6392 static void 6393 il4965_hw_detect(struct il_priv *il) 6394 { 6395 il->hw_rev = _il_rd(il, CSR_HW_REV); 6396 il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG); 6397 il->rev_id = il->pci_dev->revision; 6398 D_INFO("HW Revision ID = 0x%X\n", il->rev_id); 6399 } 6400 6401 static const struct il_sensitivity_ranges il4965_sensitivity = { 6402 .min_nrg_cck = 97, 6403 .max_nrg_cck = 0, /* not used, set to 0 */ 6404 6405 .auto_corr_min_ofdm = 85, 6406 .auto_corr_min_ofdm_mrc = 170, 6407 .auto_corr_min_ofdm_x1 = 105, 6408 .auto_corr_min_ofdm_mrc_x1 = 220, 6409 6410 .auto_corr_max_ofdm = 120, 6411 .auto_corr_max_ofdm_mrc = 210, 6412 .auto_corr_max_ofdm_x1 = 140, 6413 .auto_corr_max_ofdm_mrc_x1 = 270, 6414 6415 .auto_corr_min_cck = 125, 6416 .auto_corr_max_cck = 200, 6417 .auto_corr_min_cck_mrc = 200, 6418 .auto_corr_max_cck_mrc = 400, 6419 6420 .nrg_th_cck = 100, 6421 .nrg_th_ofdm = 100, 6422 6423 .barker_corr_th_min = 190, 6424 .barker_corr_th_min_mrc = 390, 6425 .nrg_th_cca = 62, 6426 }; 6427 6428 static void 6429 il4965_set_hw_params(struct il_priv *il) 6430 { 6431 il->hw_params.bcast_id = IL4965_BROADCAST_ID; 6432 il->hw_params.max_rxq_size = RX_QUEUE_SIZE; 6433 il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG; 6434 if (il->cfg->mod_params->amsdu_size_8K) 6435 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K); 6436 else 6437 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K); 6438 6439 il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL; 6440 6441 if (il->cfg->mod_params->disable_11n) 6442 il->cfg->sku &= ~IL_SKU_N; 6443 6444 if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES && 6445 il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES) 6446 il->cfg->num_of_queues = 6447 il->cfg->mod_params->num_of_queues; 6448 6449 il->hw_params.max_txq_num = il->cfg->num_of_queues; 6450 il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM; 6451 il->hw_params.scd_bc_tbls_size = 6452 il->cfg->num_of_queues * 6453 sizeof(struct il4965_scd_bc_tbl); 6454 6455 il->hw_params.tfd_size = sizeof(struct il_tfd); 6456 il->hw_params.max_stations = IL4965_STATION_COUNT; 6457 il->hw_params.max_data_size = IL49_RTC_DATA_SIZE; 6458 il->hw_params.max_inst_size = IL49_RTC_INST_SIZE; 6459 il->hw_params.max_bsm_size = BSM_SRAM_SIZE; 6460 il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ); 6461 6462 il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR; 6463 6464 il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant); 6465 il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant); 6466 il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant; 6467 il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant; 6468 6469 il->hw_params.ct_kill_threshold = 6470 CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY); 6471 6472 il->hw_params.sens = &il4965_sensitivity; 6473 il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS; 6474 } 6475 6476 static int 6477 il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 6478 { 6479 int err = 0; 6480 struct il_priv *il; 6481 struct ieee80211_hw *hw; 6482 struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data); 6483 unsigned long flags; 6484 u16 pci_cmd; 6485 6486 /************************ 6487 * 1. Allocating HW data 6488 ************************/ 6489 6490 hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops); 6491 if (!hw) { 6492 err = -ENOMEM; 6493 goto out; 6494 } 6495 il = hw->priv; 6496 il->hw = hw; 6497 SET_IEEE80211_DEV(hw, &pdev->dev); 6498 6499 D_INFO("*** LOAD DRIVER ***\n"); 6500 il->cfg = cfg; 6501 il->ops = &il4965_ops; 6502 #ifdef CONFIG_IWLEGACY_DEBUGFS 6503 il->debugfs_ops = &il4965_debugfs_ops; 6504 #endif 6505 il->pci_dev = pdev; 6506 il->inta_mask = CSR_INI_SET_MASK; 6507 6508 /************************** 6509 * 2. Initializing PCI bus 6510 **************************/ 6511 pci_disable_link_state(pdev, 6512 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | 6513 PCIE_LINK_STATE_CLKPM); 6514 6515 if (pci_enable_device(pdev)) { 6516 err = -ENODEV; 6517 goto out_ieee80211_free_hw; 6518 } 6519 6520 pci_set_master(pdev); 6521 6522 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); 6523 if (!err) 6524 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36)); 6525 if (err) { 6526 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 6527 if (!err) 6528 err = 6529 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 6530 /* both attempts failed: */ 6531 if (err) { 6532 IL_WARN("No suitable DMA available.\n"); 6533 goto out_pci_disable_device; 6534 } 6535 } 6536 6537 err = pci_request_regions(pdev, DRV_NAME); 6538 if (err) 6539 goto out_pci_disable_device; 6540 6541 pci_set_drvdata(pdev, il); 6542 6543 /*********************** 6544 * 3. Read REV register 6545 ***********************/ 6546 il->hw_base = pci_ioremap_bar(pdev, 0); 6547 if (!il->hw_base) { 6548 err = -ENODEV; 6549 goto out_pci_release_regions; 6550 } 6551 6552 D_INFO("pci_resource_len = 0x%08llx\n", 6553 (unsigned long long)pci_resource_len(pdev, 0)); 6554 D_INFO("pci_resource_base = %p\n", il->hw_base); 6555 6556 /* these spin locks will be used in apm_ops.init and EEPROM access 6557 * we should init now 6558 */ 6559 spin_lock_init(&il->reg_lock); 6560 spin_lock_init(&il->lock); 6561 6562 /* 6563 * stop and reset the on-board processor just in case it is in a 6564 * strange state ... like being left stranded by a primary kernel 6565 * and this is now the kdump kernel trying to start up 6566 */ 6567 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); 6568 6569 il4965_hw_detect(il); 6570 IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev); 6571 6572 /* We disable the RETRY_TIMEOUT register (0x41) to keep 6573 * PCI Tx retries from interfering with C3 CPU state */ 6574 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); 6575 6576 il4965_prepare_card_hw(il); 6577 if (!il->hw_ready) { 6578 IL_WARN("Failed, HW not ready\n"); 6579 err = -EIO; 6580 goto out_iounmap; 6581 } 6582 6583 /***************** 6584 * 4. Read EEPROM 6585 *****************/ 6586 /* Read the EEPROM */ 6587 err = il_eeprom_init(il); 6588 if (err) { 6589 IL_ERR("Unable to init EEPROM\n"); 6590 goto out_iounmap; 6591 } 6592 err = il4965_eeprom_check_version(il); 6593 if (err) 6594 goto out_free_eeprom; 6595 6596 /* extract MAC Address */ 6597 il4965_eeprom_get_mac(il, il->addresses[0].addr); 6598 D_INFO("MAC address: %pM\n", il->addresses[0].addr); 6599 il->hw->wiphy->addresses = il->addresses; 6600 il->hw->wiphy->n_addresses = 1; 6601 6602 /************************ 6603 * 5. Setup HW constants 6604 ************************/ 6605 il4965_set_hw_params(il); 6606 6607 /******************* 6608 * 6. Setup il 6609 *******************/ 6610 6611 err = il4965_init_drv(il); 6612 if (err) 6613 goto out_free_eeprom; 6614 /* At this point both hw and il are initialized. */ 6615 6616 /******************** 6617 * 7. Setup services 6618 ********************/ 6619 spin_lock_irqsave(&il->lock, flags); 6620 il_disable_interrupts(il); 6621 spin_unlock_irqrestore(&il->lock, flags); 6622 6623 pci_enable_msi(il->pci_dev); 6624 6625 err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il); 6626 if (err) { 6627 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq); 6628 goto out_disable_msi; 6629 } 6630 6631 il4965_setup_deferred_work(il); 6632 il4965_setup_handlers(il); 6633 6634 /********************************************* 6635 * 8. Enable interrupts and read RFKILL state 6636 *********************************************/ 6637 6638 /* enable rfkill interrupt: hw bug w/a */ 6639 pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd); 6640 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { 6641 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 6642 pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd); 6643 } 6644 6645 il_enable_rfkill_int(il); 6646 6647 /* If platform's RF_KILL switch is NOT set to KILL */ 6648 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) 6649 clear_bit(S_RFKILL, &il->status); 6650 else 6651 set_bit(S_RFKILL, &il->status); 6652 6653 wiphy_rfkill_set_hw_state(il->hw->wiphy, 6654 test_bit(S_RFKILL, &il->status)); 6655 6656 il_power_initialize(il); 6657 6658 init_completion(&il->_4965.firmware_loading_complete); 6659 6660 err = il4965_request_firmware(il, true); 6661 if (err) 6662 goto out_destroy_workqueue; 6663 6664 return 0; 6665 6666 out_destroy_workqueue: 6667 destroy_workqueue(il->workqueue); 6668 il->workqueue = NULL; 6669 free_irq(il->pci_dev->irq, il); 6670 out_disable_msi: 6671 pci_disable_msi(il->pci_dev); 6672 il4965_uninit_drv(il); 6673 out_free_eeprom: 6674 il_eeprom_free(il); 6675 out_iounmap: 6676 iounmap(il->hw_base); 6677 out_pci_release_regions: 6678 pci_release_regions(pdev); 6679 out_pci_disable_device: 6680 pci_disable_device(pdev); 6681 out_ieee80211_free_hw: 6682 ieee80211_free_hw(il->hw); 6683 out: 6684 return err; 6685 } 6686 6687 static void 6688 il4965_pci_remove(struct pci_dev *pdev) 6689 { 6690 struct il_priv *il = pci_get_drvdata(pdev); 6691 unsigned long flags; 6692 6693 if (!il) 6694 return; 6695 6696 wait_for_completion(&il->_4965.firmware_loading_complete); 6697 6698 D_INFO("*** UNLOAD DRIVER ***\n"); 6699 6700 il_dbgfs_unregister(il); 6701 sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group); 6702 6703 /* ieee80211_unregister_hw call wil cause il_mac_stop to 6704 * to be called and il4965_down since we are removing the device 6705 * we need to set S_EXIT_PENDING bit. 6706 */ 6707 set_bit(S_EXIT_PENDING, &il->status); 6708 6709 il_leds_exit(il); 6710 6711 if (il->mac80211_registered) { 6712 ieee80211_unregister_hw(il->hw); 6713 il->mac80211_registered = 0; 6714 } else { 6715 il4965_down(il); 6716 } 6717 6718 /* 6719 * Make sure device is reset to low power before unloading driver. 6720 * This may be redundant with il4965_down(), but there are paths to 6721 * run il4965_down() without calling apm_ops.stop(), and there are 6722 * paths to avoid running il4965_down() at all before leaving driver. 6723 * This (inexpensive) call *makes sure* device is reset. 6724 */ 6725 il_apm_stop(il); 6726 6727 /* make sure we flush any pending irq or 6728 * tasklet for the driver 6729 */ 6730 spin_lock_irqsave(&il->lock, flags); 6731 il_disable_interrupts(il); 6732 spin_unlock_irqrestore(&il->lock, flags); 6733 6734 il4965_synchronize_irq(il); 6735 6736 il4965_dealloc_ucode_pci(il); 6737 6738 if (il->rxq.bd) 6739 il4965_rx_queue_free(il, &il->rxq); 6740 il4965_hw_txq_ctx_free(il); 6741 6742 il_eeprom_free(il); 6743 6744 /*netif_stop_queue(dev); */ 6745 flush_workqueue(il->workqueue); 6746 6747 /* ieee80211_unregister_hw calls il_mac_stop, which flushes 6748 * il->workqueue... so we can't take down the workqueue 6749 * until now... */ 6750 destroy_workqueue(il->workqueue); 6751 il->workqueue = NULL; 6752 6753 free_irq(il->pci_dev->irq, il); 6754 pci_disable_msi(il->pci_dev); 6755 iounmap(il->hw_base); 6756 pci_release_regions(pdev); 6757 pci_disable_device(pdev); 6758 6759 il4965_uninit_drv(il); 6760 6761 dev_kfree_skb(il->beacon_skb); 6762 6763 ieee80211_free_hw(il->hw); 6764 } 6765 6766 /* 6767 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask 6768 * must be called under il->lock and mac access 6769 */ 6770 void 6771 il4965_txq_set_sched(struct il_priv *il, u32 mask) 6772 { 6773 il_wr_prph(il, IL49_SCD_TXFACT, mask); 6774 } 6775 6776 /***************************************************************************** 6777 * 6778 * driver and module entry point 6779 * 6780 *****************************************************************************/ 6781 6782 /* Hardware specific file defines the PCI IDs table for that hardware module */ 6783 static const struct pci_device_id il4965_hw_card_ids[] = { 6784 {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)}, 6785 {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)}, 6786 {0} 6787 }; 6788 MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids); 6789 6790 static struct pci_driver il4965_driver = { 6791 .name = DRV_NAME, 6792 .id_table = il4965_hw_card_ids, 6793 .probe = il4965_pci_probe, 6794 .remove = il4965_pci_remove, 6795 .driver.pm = IL_LEGACY_PM_OPS, 6796 }; 6797 6798 static int __init 6799 il4965_init(void) 6800 { 6801 6802 int ret; 6803 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n"); 6804 pr_info(DRV_COPYRIGHT "\n"); 6805 6806 ret = il4965_rate_control_register(); 6807 if (ret) { 6808 pr_err("Unable to register rate control algorithm: %d\n", ret); 6809 return ret; 6810 } 6811 6812 ret = pci_register_driver(&il4965_driver); 6813 if (ret) { 6814 pr_err("Unable to initialize PCI module\n"); 6815 goto error_register; 6816 } 6817 6818 return ret; 6819 6820 error_register: 6821 il4965_rate_control_unregister(); 6822 return ret; 6823 } 6824 6825 static void __exit 6826 il4965_exit(void) 6827 { 6828 pci_unregister_driver(&il4965_driver); 6829 il4965_rate_control_unregister(); 6830 } 6831 6832 module_exit(il4965_exit); 6833 module_init(il4965_init); 6834 6835 #ifdef CONFIG_IWLEGACY_DEBUG 6836 module_param_named(debug, il_debug_level, uint, 0644); 6837 MODULE_PARM_DESC(debug, "debug output mask"); 6838 #endif 6839 6840 module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, 0444); 6841 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])"); 6842 module_param_named(queues_num, il4965_mod_params.num_of_queues, int, 0444); 6843 MODULE_PARM_DESC(queues_num, "number of hw queues."); 6844 module_param_named(11n_disable, il4965_mod_params.disable_11n, int, 0444); 6845 MODULE_PARM_DESC(11n_disable, "disable 11n functionality"); 6846 module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 0444); 6847 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])"); 6848 module_param_named(fw_restart, il4965_mod_params.restart_fw, int, 0444); 6849 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error"); 6850