1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 * 4 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. 5 * 6 * Portions of this file are derived from the ipw3945 project, as well 7 * as portions of the ieee80211 subsystem header files. 8 * 9 * Contact Information: 10 * Intel Linux Wireless <ilw@linux.intel.com> 11 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 12 * 13 *****************************************************************************/ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/pci.h> 21 #include <linux/slab.h> 22 #include <linux/dma-mapping.h> 23 #include <linux/delay.h> 24 #include <linux/sched.h> 25 #include <linux/skbuff.h> 26 #include <linux/netdevice.h> 27 #include <linux/firmware.h> 28 #include <linux/etherdevice.h> 29 #include <linux/if_arp.h> 30 #include <linux/units.h> 31 32 #include <net/mac80211.h> 33 34 #include <asm/div64.h> 35 36 #define DRV_NAME "iwl4965" 37 38 #include "common.h" 39 #include "4965.h" 40 41 /****************************************************************************** 42 * 43 * module boiler plate 44 * 45 ******************************************************************************/ 46 47 /* 48 * module name, copyright, version, etc. 49 */ 50 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux" 51 52 #ifdef CONFIG_IWLEGACY_DEBUG 53 #define VD "d" 54 #else 55 #define VD 56 #endif 57 58 #define DRV_VERSION IWLWIFI_VERSION VD 59 60 MODULE_DESCRIPTION(DRV_DESCRIPTION); 61 MODULE_VERSION(DRV_VERSION); 62 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); 63 MODULE_LICENSE("GPL"); 64 MODULE_ALIAS("iwl4965"); 65 66 void 67 il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status) 68 { 69 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { 70 IL_ERR("Tx flush command to flush out all frames\n"); 71 if (!test_bit(S_EXIT_PENDING, &il->status)) 72 queue_work(il->workqueue, &il->tx_flush); 73 } 74 } 75 76 /* 77 * EEPROM 78 */ 79 struct il_mod_params il4965_mod_params = { 80 .restart_fw = 1, 81 /* the rest are 0 by default */ 82 }; 83 84 void 85 il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq) 86 { 87 unsigned long flags; 88 int i; 89 spin_lock_irqsave(&rxq->lock, flags); 90 INIT_LIST_HEAD(&rxq->rx_free); 91 INIT_LIST_HEAD(&rxq->rx_used); 92 /* Fill the rx_used queue with _all_ of the Rx buffers */ 93 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { 94 /* In the reset function, these buffers may have been allocated 95 * to an SKB, so we need to unmap and free potential storage */ 96 if (rxq->pool[i].page != NULL) { 97 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma, 98 PAGE_SIZE << il->hw_params.rx_page_order, 99 PCI_DMA_FROMDEVICE); 100 __il_free_pages(il, rxq->pool[i].page); 101 rxq->pool[i].page = NULL; 102 } 103 list_add_tail(&rxq->pool[i].list, &rxq->rx_used); 104 } 105 106 for (i = 0; i < RX_QUEUE_SIZE; i++) 107 rxq->queue[i] = NULL; 108 109 /* Set us so that we have processed and used all buffers, but have 110 * not restocked the Rx queue with fresh buffers */ 111 rxq->read = rxq->write = 0; 112 rxq->write_actual = 0; 113 rxq->free_count = 0; 114 spin_unlock_irqrestore(&rxq->lock, flags); 115 } 116 117 int 118 il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq) 119 { 120 u32 rb_size; 121 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ 122 u32 rb_timeout = 0; 123 124 if (il->cfg->mod_params->amsdu_size_8K) 125 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; 126 else 127 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; 128 129 /* Stop Rx DMA */ 130 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); 131 132 /* Reset driver's Rx queue write idx */ 133 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); 134 135 /* Tell device where to find RBD circular buffer in DRAM */ 136 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8)); 137 138 /* Tell device where in DRAM to update its Rx status */ 139 il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4); 140 141 /* Enable Rx DMA 142 * Direct rx interrupts to hosts 143 * Rx buffer size 4 or 8k 144 * RB timeout 0x10 145 * 256 RBDs 146 */ 147 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 148 FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | 149 FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | 150 FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | 151 rb_size | 152 (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) | 153 (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); 154 155 /* Set interrupt coalescing timer to default (2048 usecs) */ 156 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF); 157 158 return 0; 159 } 160 161 static void 162 il4965_set_pwr_vmain(struct il_priv *il) 163 { 164 /* 165 * (for documentation purposes) 166 * to set power to V_AUX, do: 167 168 if (pci_pme_capable(il->pci_dev, PCI_D3cold)) 169 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, 170 APMG_PS_CTRL_VAL_PWR_SRC_VAUX, 171 ~APMG_PS_CTRL_MSK_PWR_SRC); 172 */ 173 174 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, 175 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, 176 ~APMG_PS_CTRL_MSK_PWR_SRC); 177 } 178 179 int 180 il4965_hw_nic_init(struct il_priv *il) 181 { 182 unsigned long flags; 183 struct il_rx_queue *rxq = &il->rxq; 184 int ret; 185 186 spin_lock_irqsave(&il->lock, flags); 187 il_apm_init(il); 188 /* Set interrupt coalescing calibration timer to default (512 usecs) */ 189 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF); 190 spin_unlock_irqrestore(&il->lock, flags); 191 192 il4965_set_pwr_vmain(il); 193 il4965_nic_config(il); 194 195 /* Allocate the RX queue, or reset if it is already allocated */ 196 if (!rxq->bd) { 197 ret = il_rx_queue_alloc(il); 198 if (ret) { 199 IL_ERR("Unable to initialize Rx queue\n"); 200 return -ENOMEM; 201 } 202 } else 203 il4965_rx_queue_reset(il, rxq); 204 205 il4965_rx_replenish(il); 206 207 il4965_rx_init(il, rxq); 208 209 spin_lock_irqsave(&il->lock, flags); 210 211 rxq->need_update = 1; 212 il_rx_queue_update_write_ptr(il, rxq); 213 214 spin_unlock_irqrestore(&il->lock, flags); 215 216 /* Allocate or reset and init all Tx and Command queues */ 217 if (!il->txq) { 218 ret = il4965_txq_ctx_alloc(il); 219 if (ret) 220 return ret; 221 } else 222 il4965_txq_ctx_reset(il); 223 224 set_bit(S_INIT, &il->status); 225 226 return 0; 227 } 228 229 /** 230 * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr 231 */ 232 static inline __le32 233 il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr) 234 { 235 return cpu_to_le32((u32) (dma_addr >> 8)); 236 } 237 238 /** 239 * il4965_rx_queue_restock - refill RX queue from pre-allocated pool 240 * 241 * If there are slots in the RX queue that need to be restocked, 242 * and we have free pre-allocated buffers, fill the ranks as much 243 * as we can, pulling from rx_free. 244 * 245 * This moves the 'write' idx forward to catch up with 'processed', and 246 * also updates the memory address in the firmware to reference the new 247 * target buffer. 248 */ 249 void 250 il4965_rx_queue_restock(struct il_priv *il) 251 { 252 struct il_rx_queue *rxq = &il->rxq; 253 struct list_head *element; 254 struct il_rx_buf *rxb; 255 unsigned long flags; 256 257 spin_lock_irqsave(&rxq->lock, flags); 258 while (il_rx_queue_space(rxq) > 0 && rxq->free_count) { 259 /* The overwritten rxb must be a used one */ 260 rxb = rxq->queue[rxq->write]; 261 BUG_ON(rxb && rxb->page); 262 263 /* Get next free Rx buffer, remove from free list */ 264 element = rxq->rx_free.next; 265 rxb = list_entry(element, struct il_rx_buf, list); 266 list_del(element); 267 268 /* Point to Rx buffer via next RBD in circular buffer */ 269 rxq->bd[rxq->write] = 270 il4965_dma_addr2rbd_ptr(il, rxb->page_dma); 271 rxq->queue[rxq->write] = rxb; 272 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; 273 rxq->free_count--; 274 } 275 spin_unlock_irqrestore(&rxq->lock, flags); 276 /* If the pre-allocated buffer pool is dropping low, schedule to 277 * refill it */ 278 if (rxq->free_count <= RX_LOW_WATERMARK) 279 queue_work(il->workqueue, &il->rx_replenish); 280 281 /* If we've added more space for the firmware to place data, tell it. 282 * Increment device's write pointer in multiples of 8. */ 283 if (rxq->write_actual != (rxq->write & ~0x7)) { 284 spin_lock_irqsave(&rxq->lock, flags); 285 rxq->need_update = 1; 286 spin_unlock_irqrestore(&rxq->lock, flags); 287 il_rx_queue_update_write_ptr(il, rxq); 288 } 289 } 290 291 /** 292 * il4965_rx_replenish - Move all used packet from rx_used to rx_free 293 * 294 * When moving to rx_free an SKB is allocated for the slot. 295 * 296 * Also restock the Rx queue via il_rx_queue_restock. 297 * This is called as a scheduled work item (except for during initialization) 298 */ 299 static void 300 il4965_rx_allocate(struct il_priv *il, gfp_t priority) 301 { 302 struct il_rx_queue *rxq = &il->rxq; 303 struct list_head *element; 304 struct il_rx_buf *rxb; 305 struct page *page; 306 dma_addr_t page_dma; 307 unsigned long flags; 308 gfp_t gfp_mask = priority; 309 310 while (1) { 311 spin_lock_irqsave(&rxq->lock, flags); 312 if (list_empty(&rxq->rx_used)) { 313 spin_unlock_irqrestore(&rxq->lock, flags); 314 return; 315 } 316 spin_unlock_irqrestore(&rxq->lock, flags); 317 318 if (rxq->free_count > RX_LOW_WATERMARK) 319 gfp_mask |= __GFP_NOWARN; 320 321 if (il->hw_params.rx_page_order > 0) 322 gfp_mask |= __GFP_COMP; 323 324 /* Alloc a new receive buffer */ 325 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order); 326 if (!page) { 327 if (net_ratelimit()) 328 D_INFO("alloc_pages failed, " "order: %d\n", 329 il->hw_params.rx_page_order); 330 331 if (rxq->free_count <= RX_LOW_WATERMARK && 332 net_ratelimit()) 333 IL_ERR("Failed to alloc_pages with %s. " 334 "Only %u free buffers remaining.\n", 335 priority == 336 GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL", 337 rxq->free_count); 338 /* We don't reschedule replenish work here -- we will 339 * call the restock method and if it still needs 340 * more buffers it will schedule replenish */ 341 return; 342 } 343 344 /* Get physical address of the RB */ 345 page_dma = 346 pci_map_page(il->pci_dev, page, 0, 347 PAGE_SIZE << il->hw_params.rx_page_order, 348 PCI_DMA_FROMDEVICE); 349 if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) { 350 __free_pages(page, il->hw_params.rx_page_order); 351 break; 352 } 353 354 spin_lock_irqsave(&rxq->lock, flags); 355 356 if (list_empty(&rxq->rx_used)) { 357 spin_unlock_irqrestore(&rxq->lock, flags); 358 pci_unmap_page(il->pci_dev, page_dma, 359 PAGE_SIZE << il->hw_params.rx_page_order, 360 PCI_DMA_FROMDEVICE); 361 __free_pages(page, il->hw_params.rx_page_order); 362 return; 363 } 364 365 element = rxq->rx_used.next; 366 rxb = list_entry(element, struct il_rx_buf, list); 367 list_del(element); 368 369 BUG_ON(rxb->page); 370 371 rxb->page = page; 372 rxb->page_dma = page_dma; 373 list_add_tail(&rxb->list, &rxq->rx_free); 374 rxq->free_count++; 375 il->alloc_rxb_page++; 376 377 spin_unlock_irqrestore(&rxq->lock, flags); 378 } 379 } 380 381 void 382 il4965_rx_replenish(struct il_priv *il) 383 { 384 unsigned long flags; 385 386 il4965_rx_allocate(il, GFP_KERNEL); 387 388 spin_lock_irqsave(&il->lock, flags); 389 il4965_rx_queue_restock(il); 390 spin_unlock_irqrestore(&il->lock, flags); 391 } 392 393 void 394 il4965_rx_replenish_now(struct il_priv *il) 395 { 396 il4965_rx_allocate(il, GFP_ATOMIC); 397 398 il4965_rx_queue_restock(il); 399 } 400 401 /* Assumes that the skb field of the buffers in 'pool' is kept accurate. 402 * If an SKB has been detached, the POOL needs to have its SKB set to NULL 403 * This free routine walks the list of POOL entries and if SKB is set to 404 * non NULL it is unmapped and freed 405 */ 406 void 407 il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq) 408 { 409 int i; 410 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { 411 if (rxq->pool[i].page != NULL) { 412 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma, 413 PAGE_SIZE << il->hw_params.rx_page_order, 414 PCI_DMA_FROMDEVICE); 415 __il_free_pages(il, rxq->pool[i].page); 416 rxq->pool[i].page = NULL; 417 } 418 } 419 420 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, 421 rxq->bd_dma); 422 dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status), 423 rxq->rb_stts, rxq->rb_stts_dma); 424 rxq->bd = NULL; 425 rxq->rb_stts = NULL; 426 } 427 428 int 429 il4965_rxq_stop(struct il_priv *il) 430 { 431 int ret; 432 433 _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); 434 ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG, 435 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 436 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 437 1000); 438 if (ret < 0) 439 IL_ERR("Can't stop Rx DMA.\n"); 440 441 return 0; 442 } 443 444 int 445 il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band) 446 { 447 int idx = 0; 448 int band_offset = 0; 449 450 /* HT rate format: mac80211 wants an MCS number, which is just LSB */ 451 if (rate_n_flags & RATE_MCS_HT_MSK) { 452 idx = (rate_n_flags & 0xff); 453 return idx; 454 /* Legacy rate format, search for match in table */ 455 } else { 456 if (band == NL80211_BAND_5GHZ) 457 band_offset = IL_FIRST_OFDM_RATE; 458 for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++) 459 if (il_rates[idx].plcp == (rate_n_flags & 0xFF)) 460 return idx - band_offset; 461 } 462 463 return -1; 464 } 465 466 static int 467 il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp) 468 { 469 /* data from PHY/DSP regarding signal strength, etc., 470 * contents are always there, not configurable by host. */ 471 struct il4965_rx_non_cfg_phy *ncphy = 472 (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf; 473 u32 agc = 474 (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >> 475 IL49_AGC_DB_POS; 476 477 u32 valid_antennae = 478 (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK) 479 >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET; 480 u8 max_rssi = 0; 481 u32 i; 482 483 /* Find max rssi among 3 possible receivers. 484 * These values are measured by the digital signal processor (DSP). 485 * They should stay fairly constant even as the signal strength varies, 486 * if the radio's automatic gain control (AGC) is working right. 487 * AGC value (see below) will provide the "interesting" info. */ 488 for (i = 0; i < 3; i++) 489 if (valid_antennae & (1 << i)) 490 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi); 491 492 D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n", 493 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4], 494 max_rssi, agc); 495 496 /* dBm = max_rssi dB - agc dB - constant. 497 * Higher AGC (higher radio gain) means lower signal. */ 498 return max_rssi - agc - IL4965_RSSI_OFFSET; 499 } 500 501 static u32 502 il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in) 503 { 504 u32 decrypt_out = 0; 505 506 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == 507 RX_RES_STATUS_STATION_FOUND) 508 decrypt_out |= 509 (RX_RES_STATUS_STATION_FOUND | 510 RX_RES_STATUS_NO_STATION_INFO_MISMATCH); 511 512 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); 513 514 /* packet was not encrypted */ 515 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == 516 RX_RES_STATUS_SEC_TYPE_NONE) 517 return decrypt_out; 518 519 /* packet was encrypted with unknown alg */ 520 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == 521 RX_RES_STATUS_SEC_TYPE_ERR) 522 return decrypt_out; 523 524 /* decryption was not done in HW */ 525 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != 526 RX_MPDU_RES_STATUS_DEC_DONE_MSK) 527 return decrypt_out; 528 529 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { 530 531 case RX_RES_STATUS_SEC_TYPE_CCMP: 532 /* alg is CCM: check MIC only */ 533 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) 534 /* Bad MIC */ 535 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; 536 else 537 decrypt_out |= RX_RES_STATUS_DECRYPT_OK; 538 539 break; 540 541 case RX_RES_STATUS_SEC_TYPE_TKIP: 542 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { 543 /* Bad TTAK */ 544 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; 545 break; 546 } 547 /* fall through - if TTAK OK */ 548 default: 549 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) 550 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; 551 else 552 decrypt_out |= RX_RES_STATUS_DECRYPT_OK; 553 break; 554 } 555 556 D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out); 557 558 return decrypt_out; 559 } 560 561 #define SMALL_PACKET_SIZE 256 562 563 static void 564 il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr, 565 u32 len, u32 ampdu_status, struct il_rx_buf *rxb, 566 struct ieee80211_rx_status *stats) 567 { 568 struct sk_buff *skb; 569 __le16 fc = hdr->frame_control; 570 571 /* We only process data packets if the interface is open */ 572 if (unlikely(!il->is_open)) { 573 D_DROP("Dropping packet while interface is not open.\n"); 574 return; 575 } 576 577 if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) { 578 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE); 579 D_INFO("Woke queues - frame received on passive channel\n"); 580 } 581 582 /* In case of HW accelerated crypto and bad decryption, drop */ 583 if (!il->cfg->mod_params->sw_crypto && 584 il_set_decrypted_flag(il, hdr, ampdu_status, stats)) 585 return; 586 587 skb = dev_alloc_skb(SMALL_PACKET_SIZE); 588 if (!skb) { 589 IL_ERR("dev_alloc_skb failed\n"); 590 return; 591 } 592 593 if (len <= SMALL_PACKET_SIZE) { 594 skb_put_data(skb, hdr, len); 595 } else { 596 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), 597 len, PAGE_SIZE << il->hw_params.rx_page_order); 598 il->alloc_rxb_page--; 599 rxb->page = NULL; 600 } 601 602 il_update_stats(il, false, fc, len); 603 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); 604 605 ieee80211_rx(il->hw, skb); 606 } 607 608 /* Called for N_RX (legacy ABG frames), or 609 * N_RX_MPDU (HT high-throughput N frames). */ 610 static void 611 il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb) 612 { 613 struct ieee80211_hdr *header; 614 struct ieee80211_rx_status rx_status = {}; 615 struct il_rx_pkt *pkt = rxb_addr(rxb); 616 struct il_rx_phy_res *phy_res; 617 __le32 rx_pkt_status; 618 struct il_rx_mpdu_res_start *amsdu; 619 u32 len; 620 u32 ampdu_status; 621 u32 rate_n_flags; 622 623 /** 624 * N_RX and N_RX_MPDU are handled differently. 625 * N_RX: physical layer info is in this buffer 626 * N_RX_MPDU: physical layer info was sent in separate 627 * command and cached in il->last_phy_res 628 * 629 * Here we set up local variables depending on which command is 630 * received. 631 */ 632 if (pkt->hdr.cmd == N_RX) { 633 phy_res = (struct il_rx_phy_res *)pkt->u.raw; 634 header = 635 (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) + 636 phy_res->cfg_phy_cnt); 637 638 len = le16_to_cpu(phy_res->byte_count); 639 rx_pkt_status = 640 *(__le32 *) (pkt->u.raw + sizeof(*phy_res) + 641 phy_res->cfg_phy_cnt + len); 642 ampdu_status = le32_to_cpu(rx_pkt_status); 643 } else { 644 if (!il->_4965.last_phy_res_valid) { 645 IL_ERR("MPDU frame without cached PHY data\n"); 646 return; 647 } 648 phy_res = &il->_4965.last_phy_res; 649 amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw; 650 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); 651 len = le16_to_cpu(amsdu->byte_count); 652 rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len); 653 ampdu_status = 654 il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status)); 655 } 656 657 if ((unlikely(phy_res->cfg_phy_cnt > 20))) { 658 D_DROP("dsp size out of range [0,20]: %d\n", 659 phy_res->cfg_phy_cnt); 660 return; 661 } 662 663 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || 664 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { 665 D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status)); 666 return; 667 } 668 669 /* This will be used in several places later */ 670 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); 671 672 /* rx_status carries information about the packet to mac80211 */ 673 rx_status.mactime = le64_to_cpu(phy_res->timestamp); 674 rx_status.band = 675 (phy_res-> 676 phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ : 677 NL80211_BAND_5GHZ; 678 rx_status.freq = 679 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel), 680 rx_status.band); 681 rx_status.rate_idx = 682 il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); 683 rx_status.flag = 0; 684 685 /* TSF isn't reliable. In order to allow smooth user experience, 686 * this W/A doesn't propagate it to the mac80211 */ 687 /*rx_status.flag |= RX_FLAG_MACTIME_START; */ 688 689 il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp); 690 691 /* Find max signal strength (dBm) among 3 antenna/receiver chains */ 692 rx_status.signal = il4965_calc_rssi(il, phy_res); 693 694 D_STATS("Rssi %d, TSF %llu\n", rx_status.signal, 695 (unsigned long long)rx_status.mactime); 696 697 /* 698 * "antenna number" 699 * 700 * It seems that the antenna field in the phy flags value 701 * is actually a bit field. This is undefined by radiotap, 702 * it wants an actual antenna number but I always get "7" 703 * for most legacy frames I receive indicating that the 704 * same frame was received on all three RX chains. 705 * 706 * I think this field should be removed in favor of a 707 * new 802.11n radiotap field "RX chains" that is defined 708 * as a bitmask. 709 */ 710 rx_status.antenna = 711 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 712 RX_RES_PHY_FLAGS_ANTENNA_POS; 713 714 /* set the preamble flag if appropriate */ 715 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) 716 rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE; 717 718 /* Set up the HT phy flags */ 719 if (rate_n_flags & RATE_MCS_HT_MSK) 720 rx_status.encoding = RX_ENC_HT; 721 if (rate_n_flags & RATE_MCS_HT40_MSK) 722 rx_status.bw = RATE_INFO_BW_40; 723 else 724 rx_status.bw = RATE_INFO_BW_20; 725 if (rate_n_flags & RATE_MCS_SGI_MSK) 726 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI; 727 728 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) { 729 /* We know which subframes of an A-MPDU belong 730 * together since we get a single PHY response 731 * from the firmware for all of them. 732 */ 733 734 rx_status.flag |= RX_FLAG_AMPDU_DETAILS; 735 rx_status.ampdu_reference = il->_4965.ampdu_ref; 736 } 737 738 il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb, 739 &rx_status); 740 } 741 742 /* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY). 743 * This will be used later in il_hdl_rx() for N_RX_MPDU. */ 744 static void 745 il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb) 746 { 747 struct il_rx_pkt *pkt = rxb_addr(rxb); 748 il->_4965.last_phy_res_valid = true; 749 il->_4965.ampdu_ref++; 750 memcpy(&il->_4965.last_phy_res, pkt->u.raw, 751 sizeof(struct il_rx_phy_res)); 752 } 753 754 static int 755 il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif, 756 enum nl80211_band band, u8 is_active, 757 u8 n_probes, struct il_scan_channel *scan_ch) 758 { 759 struct ieee80211_channel *chan; 760 const struct ieee80211_supported_band *sband; 761 const struct il_channel_info *ch_info; 762 u16 passive_dwell = 0; 763 u16 active_dwell = 0; 764 int added, i; 765 u16 channel; 766 767 sband = il_get_hw_mode(il, band); 768 if (!sband) 769 return 0; 770 771 active_dwell = il_get_active_dwell_time(il, band, n_probes); 772 passive_dwell = il_get_passive_dwell_time(il, band, vif); 773 774 if (passive_dwell <= active_dwell) 775 passive_dwell = active_dwell + 1; 776 777 for (i = 0, added = 0; i < il->scan_request->n_channels; i++) { 778 chan = il->scan_request->channels[i]; 779 780 if (chan->band != band) 781 continue; 782 783 channel = chan->hw_value; 784 scan_ch->channel = cpu_to_le16(channel); 785 786 ch_info = il_get_channel_info(il, band, channel); 787 if (!il_is_channel_valid(ch_info)) { 788 D_SCAN("Channel %d is INVALID for this band.\n", 789 channel); 790 continue; 791 } 792 793 if (!is_active || il_is_channel_passive(ch_info) || 794 (chan->flags & IEEE80211_CHAN_NO_IR)) 795 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; 796 else 797 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; 798 799 if (n_probes) 800 scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes); 801 802 scan_ch->active_dwell = cpu_to_le16(active_dwell); 803 scan_ch->passive_dwell = cpu_to_le16(passive_dwell); 804 805 /* Set txpower levels to defaults */ 806 scan_ch->dsp_atten = 110; 807 808 /* NOTE: if we were doing 6Mb OFDM for scans we'd use 809 * power level: 810 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; 811 */ 812 if (band == NL80211_BAND_5GHZ) 813 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; 814 else 815 scan_ch->tx_gain = ((1 << 5) | (5 << 3)); 816 817 D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel, 818 le32_to_cpu(scan_ch->type), 819 (scan_ch-> 820 type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE", 821 (scan_ch-> 822 type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell : 823 passive_dwell); 824 825 scan_ch++; 826 added++; 827 } 828 829 D_SCAN("total channels to scan %d\n", added); 830 return added; 831 } 832 833 static void 834 il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid) 835 { 836 int i; 837 u8 ind = *ant; 838 839 for (i = 0; i < RATE_ANT_NUM - 1; i++) { 840 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0; 841 if (valid & BIT(ind)) { 842 *ant = ind; 843 return; 844 } 845 } 846 } 847 848 int 849 il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif) 850 { 851 struct il_host_cmd cmd = { 852 .id = C_SCAN, 853 .len = sizeof(struct il_scan_cmd), 854 .flags = CMD_SIZE_HUGE, 855 }; 856 struct il_scan_cmd *scan; 857 u32 rate_flags = 0; 858 u16 cmd_len; 859 u16 rx_chain = 0; 860 enum nl80211_band band; 861 u8 n_probes = 0; 862 u8 rx_ant = il->hw_params.valid_rx_ant; 863 u8 rate; 864 bool is_active = false; 865 int chan_mod; 866 u8 active_chains; 867 u8 scan_tx_antennas = il->hw_params.valid_tx_ant; 868 int ret; 869 870 lockdep_assert_held(&il->mutex); 871 872 if (!il->scan_cmd) { 873 il->scan_cmd = 874 kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE, 875 GFP_KERNEL); 876 if (!il->scan_cmd) { 877 D_SCAN("fail to allocate memory for scan\n"); 878 return -ENOMEM; 879 } 880 } 881 scan = il->scan_cmd; 882 memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE); 883 884 scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH; 885 scan->quiet_time = IL_ACTIVE_QUIET_TIME; 886 887 if (il_is_any_associated(il)) { 888 u16 interval; 889 u32 extra; 890 u32 suspend_time = 100; 891 u32 scan_suspend_time = 100; 892 893 D_INFO("Scanning while associated...\n"); 894 interval = vif->bss_conf.beacon_int; 895 896 scan->suspend_time = 0; 897 scan->max_out_time = cpu_to_le32(200 * 1024); 898 if (!interval) 899 interval = suspend_time; 900 901 extra = (suspend_time / interval) << 22; 902 scan_suspend_time = 903 (extra | ((suspend_time % interval) * 1024)); 904 scan->suspend_time = cpu_to_le32(scan_suspend_time); 905 D_SCAN("suspend_time 0x%X beacon interval %d\n", 906 scan_suspend_time, interval); 907 } 908 909 if (il->scan_request->n_ssids) { 910 int i, p = 0; 911 D_SCAN("Kicking off active scan\n"); 912 for (i = 0; i < il->scan_request->n_ssids; i++) { 913 /* always does wildcard anyway */ 914 if (!il->scan_request->ssids[i].ssid_len) 915 continue; 916 scan->direct_scan[p].id = WLAN_EID_SSID; 917 scan->direct_scan[p].len = 918 il->scan_request->ssids[i].ssid_len; 919 memcpy(scan->direct_scan[p].ssid, 920 il->scan_request->ssids[i].ssid, 921 il->scan_request->ssids[i].ssid_len); 922 n_probes++; 923 p++; 924 } 925 is_active = true; 926 } else 927 D_SCAN("Start passive scan.\n"); 928 929 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; 930 scan->tx_cmd.sta_id = il->hw_params.bcast_id; 931 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 932 933 switch (il->scan_band) { 934 case NL80211_BAND_2GHZ: 935 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; 936 chan_mod = 937 le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >> 938 RXON_FLG_CHANNEL_MODE_POS; 939 if (chan_mod == CHANNEL_MODE_PURE_40) { 940 rate = RATE_6M_PLCP; 941 } else { 942 rate = RATE_1M_PLCP; 943 rate_flags = RATE_MCS_CCK_MSK; 944 } 945 break; 946 case NL80211_BAND_5GHZ: 947 rate = RATE_6M_PLCP; 948 break; 949 default: 950 IL_WARN("Invalid scan band\n"); 951 return -EIO; 952 } 953 954 /* 955 * If active scanning is requested but a certain channel is 956 * marked passive, we can do active scanning if we detect 957 * transmissions. 958 * 959 * There is an issue with some firmware versions that triggers 960 * a sysassert on a "good CRC threshold" of zero (== disabled), 961 * on a radar channel even though this means that we should NOT 962 * send probes. 963 * 964 * The "good CRC threshold" is the number of frames that we 965 * need to receive during our dwell time on a channel before 966 * sending out probes -- setting this to a huge value will 967 * mean we never reach it, but at the same time work around 968 * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER 969 * here instead of IL_GOOD_CRC_TH_DISABLED. 970 */ 971 scan->good_CRC_th = 972 is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER; 973 974 band = il->scan_band; 975 976 if (il->cfg->scan_rx_antennas[band]) 977 rx_ant = il->cfg->scan_rx_antennas[band]; 978 979 il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas); 980 rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS; 981 scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags); 982 983 /* In power save mode use one chain, otherwise use all chains */ 984 if (test_bit(S_POWER_PMI, &il->status)) { 985 /* rx_ant has been set to all valid chains previously */ 986 active_chains = 987 rx_ant & ((u8) (il->chain_noise_data.active_chains)); 988 if (!active_chains) 989 active_chains = rx_ant; 990 991 D_SCAN("chain_noise_data.active_chains: %u\n", 992 il->chain_noise_data.active_chains); 993 994 rx_ant = il4965_first_antenna(active_chains); 995 } 996 997 /* MIMO is not used here, but value is required */ 998 rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; 999 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; 1000 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; 1001 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; 1002 scan->rx_chain = cpu_to_le16(rx_chain); 1003 1004 cmd_len = 1005 il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data, 1006 vif->addr, il->scan_request->ie, 1007 il->scan_request->ie_len, 1008 IL_MAX_SCAN_SIZE - sizeof(*scan)); 1009 scan->tx_cmd.len = cpu_to_le16(cmd_len); 1010 1011 scan->filter_flags |= 1012 (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK); 1013 1014 scan->channel_count = 1015 il4965_get_channels_for_scan(il, vif, band, is_active, n_probes, 1016 (void *)&scan->data[cmd_len]); 1017 if (scan->channel_count == 0) { 1018 D_SCAN("channel count %d\n", scan->channel_count); 1019 return -EIO; 1020 } 1021 1022 cmd.len += 1023 le16_to_cpu(scan->tx_cmd.len) + 1024 scan->channel_count * sizeof(struct il_scan_channel); 1025 cmd.data = scan; 1026 scan->len = cpu_to_le16(cmd.len); 1027 1028 set_bit(S_SCAN_HW, &il->status); 1029 1030 ret = il_send_cmd_sync(il, &cmd); 1031 if (ret) 1032 clear_bit(S_SCAN_HW, &il->status); 1033 1034 return ret; 1035 } 1036 1037 int 1038 il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif, 1039 bool add) 1040 { 1041 struct il_vif_priv *vif_priv = (void *)vif->drv_priv; 1042 1043 if (add) 1044 return il4965_add_bssid_station(il, vif->bss_conf.bssid, 1045 &vif_priv->ibss_bssid_sta_id); 1046 return il_remove_station(il, vif_priv->ibss_bssid_sta_id, 1047 vif->bss_conf.bssid); 1048 } 1049 1050 void 1051 il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed) 1052 { 1053 lockdep_assert_held(&il->sta_lock); 1054 1055 if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed) 1056 il->stations[sta_id].tid[tid].tfds_in_queue -= freed; 1057 else { 1058 D_TX("free more than tfds_in_queue (%u:%d)\n", 1059 il->stations[sta_id].tid[tid].tfds_in_queue, freed); 1060 il->stations[sta_id].tid[tid].tfds_in_queue = 0; 1061 } 1062 } 1063 1064 #define IL_TX_QUEUE_MSK 0xfffff 1065 1066 static bool 1067 il4965_is_single_rx_stream(struct il_priv *il) 1068 { 1069 return il->current_ht_config.smps == IEEE80211_SMPS_STATIC || 1070 il->current_ht_config.single_chain_sufficient; 1071 } 1072 1073 #define IL_NUM_RX_CHAINS_MULTIPLE 3 1074 #define IL_NUM_RX_CHAINS_SINGLE 2 1075 #define IL_NUM_IDLE_CHAINS_DUAL 2 1076 #define IL_NUM_IDLE_CHAINS_SINGLE 1 1077 1078 /* 1079 * Determine how many receiver/antenna chains to use. 1080 * 1081 * More provides better reception via diversity. Fewer saves power 1082 * at the expense of throughput, but only when not in powersave to 1083 * start with. 1084 * 1085 * MIMO (dual stream) requires at least 2, but works better with 3. 1086 * This does not determine *which* chains to use, just how many. 1087 */ 1088 static int 1089 il4965_get_active_rx_chain_count(struct il_priv *il) 1090 { 1091 /* # of Rx chains to use when expecting MIMO. */ 1092 if (il4965_is_single_rx_stream(il)) 1093 return IL_NUM_RX_CHAINS_SINGLE; 1094 else 1095 return IL_NUM_RX_CHAINS_MULTIPLE; 1096 } 1097 1098 /* 1099 * When we are in power saving mode, unless device support spatial 1100 * multiplexing power save, use the active count for rx chain count. 1101 */ 1102 static int 1103 il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt) 1104 { 1105 /* # Rx chains when idling, depending on SMPS mode */ 1106 switch (il->current_ht_config.smps) { 1107 case IEEE80211_SMPS_STATIC: 1108 case IEEE80211_SMPS_DYNAMIC: 1109 return IL_NUM_IDLE_CHAINS_SINGLE; 1110 case IEEE80211_SMPS_OFF: 1111 return active_cnt; 1112 default: 1113 WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps); 1114 return active_cnt; 1115 } 1116 } 1117 1118 /* up to 4 chains */ 1119 static u8 1120 il4965_count_chain_bitmap(u32 chain_bitmap) 1121 { 1122 u8 res; 1123 res = (chain_bitmap & BIT(0)) >> 0; 1124 res += (chain_bitmap & BIT(1)) >> 1; 1125 res += (chain_bitmap & BIT(2)) >> 2; 1126 res += (chain_bitmap & BIT(3)) >> 3; 1127 return res; 1128 } 1129 1130 /** 1131 * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image 1132 * 1133 * Selects how many and which Rx receivers/antennas/chains to use. 1134 * This should not be used for scan command ... it puts data in wrong place. 1135 */ 1136 void 1137 il4965_set_rxon_chain(struct il_priv *il) 1138 { 1139 bool is_single = il4965_is_single_rx_stream(il); 1140 bool is_cam = !test_bit(S_POWER_PMI, &il->status); 1141 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt; 1142 u32 active_chains; 1143 u16 rx_chain; 1144 1145 /* Tell uCode which antennas are actually connected. 1146 * Before first association, we assume all antennas are connected. 1147 * Just after first association, il4965_chain_noise_calibration() 1148 * checks which antennas actually *are* connected. */ 1149 if (il->chain_noise_data.active_chains) 1150 active_chains = il->chain_noise_data.active_chains; 1151 else 1152 active_chains = il->hw_params.valid_rx_ant; 1153 1154 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS; 1155 1156 /* How many receivers should we use? */ 1157 active_rx_cnt = il4965_get_active_rx_chain_count(il); 1158 idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt); 1159 1160 /* correct rx chain count according hw settings 1161 * and chain noise calibration 1162 */ 1163 valid_rx_cnt = il4965_count_chain_bitmap(active_chains); 1164 if (valid_rx_cnt < active_rx_cnt) 1165 active_rx_cnt = valid_rx_cnt; 1166 1167 if (valid_rx_cnt < idle_rx_cnt) 1168 idle_rx_cnt = valid_rx_cnt; 1169 1170 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS; 1171 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS; 1172 1173 il->staging.rx_chain = cpu_to_le16(rx_chain); 1174 1175 if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam) 1176 il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK; 1177 else 1178 il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK; 1179 1180 D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain, 1181 active_rx_cnt, idle_rx_cnt); 1182 1183 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 || 1184 active_rx_cnt < idle_rx_cnt); 1185 } 1186 1187 static const char * 1188 il4965_get_fh_string(int cmd) 1189 { 1190 switch (cmd) { 1191 IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG); 1192 IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG); 1193 IL_CMD(FH49_RSCSR_CHNL0_WPTR); 1194 IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG); 1195 IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG); 1196 IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG); 1197 IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); 1198 IL_CMD(FH49_TSSR_TX_STATUS_REG); 1199 IL_CMD(FH49_TSSR_TX_ERROR_REG); 1200 default: 1201 return "UNKNOWN"; 1202 } 1203 } 1204 1205 int 1206 il4965_dump_fh(struct il_priv *il, char **buf, bool display) 1207 { 1208 int i; 1209 #ifdef CONFIG_IWLEGACY_DEBUG 1210 int pos = 0; 1211 size_t bufsz = 0; 1212 #endif 1213 static const u32 fh_tbl[] = { 1214 FH49_RSCSR_CHNL0_STTS_WPTR_REG, 1215 FH49_RSCSR_CHNL0_RBDCB_BASE_REG, 1216 FH49_RSCSR_CHNL0_WPTR, 1217 FH49_MEM_RCSR_CHNL0_CONFIG_REG, 1218 FH49_MEM_RSSR_SHARED_CTRL_REG, 1219 FH49_MEM_RSSR_RX_STATUS_REG, 1220 FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, 1221 FH49_TSSR_TX_STATUS_REG, 1222 FH49_TSSR_TX_ERROR_REG 1223 }; 1224 #ifdef CONFIG_IWLEGACY_DEBUG 1225 if (display) { 1226 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; 1227 *buf = kmalloc(bufsz, GFP_KERNEL); 1228 if (!*buf) 1229 return -ENOMEM; 1230 pos += 1231 scnprintf(*buf + pos, bufsz - pos, "FH register values:\n"); 1232 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 1233 pos += 1234 scnprintf(*buf + pos, bufsz - pos, 1235 " %34s: 0X%08x\n", 1236 il4965_get_fh_string(fh_tbl[i]), 1237 il_rd(il, fh_tbl[i])); 1238 } 1239 return pos; 1240 } 1241 #endif 1242 IL_ERR("FH register values:\n"); 1243 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 1244 IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]), 1245 il_rd(il, fh_tbl[i])); 1246 } 1247 return 0; 1248 } 1249 1250 static void 1251 il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb) 1252 { 1253 struct il_rx_pkt *pkt = rxb_addr(rxb); 1254 struct il_missed_beacon_notif *missed_beacon; 1255 1256 missed_beacon = &pkt->u.missed_beacon; 1257 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) > 1258 il->missed_beacon_threshold) { 1259 D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n", 1260 le32_to_cpu(missed_beacon->consecutive_missed_beacons), 1261 le32_to_cpu(missed_beacon->total_missed_becons), 1262 le32_to_cpu(missed_beacon->num_recvd_beacons), 1263 le32_to_cpu(missed_beacon->num_expected_beacons)); 1264 if (!test_bit(S_SCANNING, &il->status)) 1265 il4965_init_sensitivity(il); 1266 } 1267 } 1268 1269 /* Calculate noise level, based on measurements during network silence just 1270 * before arriving beacon. This measurement can be done only if we know 1271 * exactly when to expect beacons, therefore only when we're associated. */ 1272 static void 1273 il4965_rx_calc_noise(struct il_priv *il) 1274 { 1275 struct stats_rx_non_phy *rx_info; 1276 int num_active_rx = 0; 1277 int total_silence = 0; 1278 int bcn_silence_a, bcn_silence_b, bcn_silence_c; 1279 int last_rx_noise; 1280 1281 rx_info = &(il->_4965.stats.rx.general); 1282 bcn_silence_a = 1283 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; 1284 bcn_silence_b = 1285 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; 1286 bcn_silence_c = 1287 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; 1288 1289 if (bcn_silence_a) { 1290 total_silence += bcn_silence_a; 1291 num_active_rx++; 1292 } 1293 if (bcn_silence_b) { 1294 total_silence += bcn_silence_b; 1295 num_active_rx++; 1296 } 1297 if (bcn_silence_c) { 1298 total_silence += bcn_silence_c; 1299 num_active_rx++; 1300 } 1301 1302 /* Average among active antennas */ 1303 if (num_active_rx) 1304 last_rx_noise = (total_silence / num_active_rx) - 107; 1305 else 1306 last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE; 1307 1308 D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a, 1309 bcn_silence_b, bcn_silence_c, last_rx_noise); 1310 } 1311 1312 #ifdef CONFIG_IWLEGACY_DEBUGFS 1313 /* 1314 * based on the assumption of all stats counter are in DWORD 1315 * FIXME: This function is for debugging, do not deal with 1316 * the case of counters roll-over. 1317 */ 1318 static void 1319 il4965_accumulative_stats(struct il_priv *il, __le32 * stats) 1320 { 1321 int i, size; 1322 __le32 *prev_stats; 1323 u32 *accum_stats; 1324 u32 *delta, *max_delta; 1325 struct stats_general_common *general, *accum_general; 1326 1327 prev_stats = (__le32 *) &il->_4965.stats; 1328 accum_stats = (u32 *) &il->_4965.accum_stats; 1329 size = sizeof(struct il_notif_stats); 1330 general = &il->_4965.stats.general.common; 1331 accum_general = &il->_4965.accum_stats.general.common; 1332 delta = (u32 *) &il->_4965.delta_stats; 1333 max_delta = (u32 *) &il->_4965.max_delta; 1334 1335 for (i = sizeof(__le32); i < size; 1336 i += 1337 sizeof(__le32), stats++, prev_stats++, delta++, max_delta++, 1338 accum_stats++) { 1339 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) { 1340 *delta = 1341 (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats)); 1342 *accum_stats += *delta; 1343 if (*delta > *max_delta) 1344 *max_delta = *delta; 1345 } 1346 } 1347 1348 /* reset accumulative stats for "no-counter" type stats */ 1349 accum_general->temperature = general->temperature; 1350 accum_general->ttl_timestamp = general->ttl_timestamp; 1351 } 1352 #endif 1353 1354 static void 1355 il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb) 1356 { 1357 const int recalib_seconds = 60; 1358 bool change; 1359 struct il_rx_pkt *pkt = rxb_addr(rxb); 1360 1361 D_RX("Statistics notification received (%d vs %d).\n", 1362 (int)sizeof(struct il_notif_stats), 1363 le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK); 1364 1365 change = 1366 ((il->_4965.stats.general.common.temperature != 1367 pkt->u.stats.general.common.temperature) || 1368 ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) != 1369 (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK))); 1370 #ifdef CONFIG_IWLEGACY_DEBUGFS 1371 il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats); 1372 #endif 1373 1374 /* TODO: reading some of stats is unneeded */ 1375 memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats)); 1376 1377 set_bit(S_STATS, &il->status); 1378 1379 /* 1380 * Reschedule the stats timer to occur in recalib_seconds to ensure 1381 * we get a thermal update even if the uCode doesn't give us one 1382 */ 1383 mod_timer(&il->stats_periodic, 1384 jiffies + msecs_to_jiffies(recalib_seconds * 1000)); 1385 1386 if (unlikely(!test_bit(S_SCANNING, &il->status)) && 1387 (pkt->hdr.cmd == N_STATS)) { 1388 il4965_rx_calc_noise(il); 1389 queue_work(il->workqueue, &il->run_time_calib_work); 1390 } 1391 1392 if (change) 1393 il4965_temperature_calib(il); 1394 } 1395 1396 static void 1397 il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb) 1398 { 1399 struct il_rx_pkt *pkt = rxb_addr(rxb); 1400 1401 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) { 1402 #ifdef CONFIG_IWLEGACY_DEBUGFS 1403 memset(&il->_4965.accum_stats, 0, 1404 sizeof(struct il_notif_stats)); 1405 memset(&il->_4965.delta_stats, 0, 1406 sizeof(struct il_notif_stats)); 1407 memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats)); 1408 #endif 1409 D_RX("Statistics have been cleared\n"); 1410 } 1411 il4965_hdl_stats(il, rxb); 1412 } 1413 1414 1415 /* 1416 * mac80211 queues, ACs, hardware queues, FIFOs. 1417 * 1418 * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues 1419 * 1420 * Mac80211 uses the following numbers, which we get as from it 1421 * by way of skb_get_queue_mapping(skb): 1422 * 1423 * VO 0 1424 * VI 1 1425 * BE 2 1426 * BK 3 1427 * 1428 * 1429 * Regular (not A-MPDU) frames are put into hardware queues corresponding 1430 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their 1431 * own queue per aggregation session (RA/TID combination), such queues are 1432 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In 1433 * order to map frames to the right queue, we also need an AC->hw queue 1434 * mapping. This is implemented here. 1435 * 1436 * Due to the way hw queues are set up (by the hw specific modules like 1437 * 4965.c), the AC->hw queue mapping is the identity 1438 * mapping. 1439 */ 1440 1441 static const u8 tid_to_ac[] = { 1442 IEEE80211_AC_BE, 1443 IEEE80211_AC_BK, 1444 IEEE80211_AC_BK, 1445 IEEE80211_AC_BE, 1446 IEEE80211_AC_VI, 1447 IEEE80211_AC_VI, 1448 IEEE80211_AC_VO, 1449 IEEE80211_AC_VO 1450 }; 1451 1452 static inline int 1453 il4965_get_ac_from_tid(u16 tid) 1454 { 1455 if (likely(tid < ARRAY_SIZE(tid_to_ac))) 1456 return tid_to_ac[tid]; 1457 1458 /* no support for TIDs 8-15 yet */ 1459 return -EINVAL; 1460 } 1461 1462 static inline int 1463 il4965_get_fifo_from_tid(u16 tid) 1464 { 1465 static const u8 ac_to_fifo[] = { 1466 IL_TX_FIFO_VO, 1467 IL_TX_FIFO_VI, 1468 IL_TX_FIFO_BE, 1469 IL_TX_FIFO_BK, 1470 }; 1471 1472 if (likely(tid < ARRAY_SIZE(tid_to_ac))) 1473 return ac_to_fifo[tid_to_ac[tid]]; 1474 1475 /* no support for TIDs 8-15 yet */ 1476 return -EINVAL; 1477 } 1478 1479 /* 1480 * handle build C_TX command notification. 1481 */ 1482 static void 1483 il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb, 1484 struct il_tx_cmd *tx_cmd, 1485 struct ieee80211_tx_info *info, 1486 struct ieee80211_hdr *hdr, u8 std_id) 1487 { 1488 __le16 fc = hdr->frame_control; 1489 __le32 tx_flags = tx_cmd->tx_flags; 1490 1491 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 1492 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { 1493 tx_flags |= TX_CMD_FLG_ACK_MSK; 1494 if (ieee80211_is_mgmt(fc)) 1495 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1496 if (ieee80211_is_probe_resp(fc) && 1497 !(le16_to_cpu(hdr->seq_ctrl) & 0xf)) 1498 tx_flags |= TX_CMD_FLG_TSF_MSK; 1499 } else { 1500 tx_flags &= (~TX_CMD_FLG_ACK_MSK); 1501 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1502 } 1503 1504 if (ieee80211_is_back_req(fc)) 1505 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; 1506 1507 tx_cmd->sta_id = std_id; 1508 if (ieee80211_has_morefrags(fc)) 1509 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; 1510 1511 if (ieee80211_is_data_qos(fc)) { 1512 u8 *qc = ieee80211_get_qos_ctl(hdr); 1513 tx_cmd->tid_tspec = qc[0] & 0xf; 1514 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 1515 } else { 1516 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1517 } 1518 1519 il_tx_cmd_protection(il, info, fc, &tx_flags); 1520 1521 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); 1522 if (ieee80211_is_mgmt(fc)) { 1523 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 1524 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); 1525 else 1526 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); 1527 } else { 1528 tx_cmd->timeout.pm_frame_timeout = 0; 1529 } 1530 1531 tx_cmd->driver_txop = 0; 1532 tx_cmd->tx_flags = tx_flags; 1533 tx_cmd->next_frame_len = 0; 1534 } 1535 1536 static void 1537 il4965_tx_cmd_build_rate(struct il_priv *il, 1538 struct il_tx_cmd *tx_cmd, 1539 struct ieee80211_tx_info *info, 1540 struct ieee80211_sta *sta, 1541 __le16 fc) 1542 { 1543 const u8 rts_retry_limit = 60; 1544 u32 rate_flags; 1545 int rate_idx; 1546 u8 data_retry_limit; 1547 u8 rate_plcp; 1548 1549 /* Set retry limit on DATA packets and Probe Responses */ 1550 if (ieee80211_is_probe_resp(fc)) 1551 data_retry_limit = 3; 1552 else 1553 data_retry_limit = IL4965_DEFAULT_TX_RETRY; 1554 tx_cmd->data_retry_limit = data_retry_limit; 1555 /* Set retry limit on RTS packets */ 1556 tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit); 1557 1558 /* DATA packets will use the uCode station table for rate/antenna 1559 * selection */ 1560 if (ieee80211_is_data(fc)) { 1561 tx_cmd->initial_rate_idx = 0; 1562 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 1563 return; 1564 } 1565 1566 /** 1567 * If the current TX rate stored in mac80211 has the MCS bit set, it's 1568 * not really a TX rate. Thus, we use the lowest supported rate for 1569 * this band. Also use the lowest supported rate if the stored rate 1570 * idx is invalid. 1571 */ 1572 rate_idx = info->control.rates[0].idx; 1573 if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0 1574 || rate_idx > RATE_COUNT_LEGACY) 1575 rate_idx = rate_lowest_index(&il->bands[info->band], sta); 1576 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 1577 if (info->band == NL80211_BAND_5GHZ) 1578 rate_idx += IL_FIRST_OFDM_RATE; 1579 /* Get PLCP rate for tx_cmd->rate_n_flags */ 1580 rate_plcp = il_rates[rate_idx].plcp; 1581 /* Zero out flags for this packet */ 1582 rate_flags = 0; 1583 1584 /* Set CCK flag as needed */ 1585 if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE) 1586 rate_flags |= RATE_MCS_CCK_MSK; 1587 1588 /* Set up antennas */ 1589 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); 1590 rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; 1591 1592 /* Set the rate in the TX cmd */ 1593 tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags); 1594 } 1595 1596 static void 1597 il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info, 1598 struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag, 1599 int sta_id) 1600 { 1601 struct ieee80211_key_conf *keyconf = info->control.hw_key; 1602 1603 switch (keyconf->cipher) { 1604 case WLAN_CIPHER_SUITE_CCMP: 1605 tx_cmd->sec_ctl = TX_CMD_SEC_CCM; 1606 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); 1607 if (info->flags & IEEE80211_TX_CTL_AMPDU) 1608 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; 1609 D_TX("tx_cmd with AES hwcrypto\n"); 1610 break; 1611 1612 case WLAN_CIPHER_SUITE_TKIP: 1613 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 1614 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 1615 D_TX("tx_cmd with tkip hwcrypto\n"); 1616 break; 1617 1618 case WLAN_CIPHER_SUITE_WEP104: 1619 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 1620 /* fall through */ 1621 case WLAN_CIPHER_SUITE_WEP40: 1622 tx_cmd->sec_ctl |= 1623 (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) << 1624 TX_CMD_SEC_SHIFT); 1625 1626 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 1627 1628 D_TX("Configuring packet for WEP encryption " "with key %d\n", 1629 keyconf->keyidx); 1630 break; 1631 1632 default: 1633 IL_ERR("Unknown encode cipher %x\n", keyconf->cipher); 1634 break; 1635 } 1636 } 1637 1638 /* 1639 * start C_TX command process 1640 */ 1641 int 1642 il4965_tx_skb(struct il_priv *il, 1643 struct ieee80211_sta *sta, 1644 struct sk_buff *skb) 1645 { 1646 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1647 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1648 struct il_station_priv *sta_priv = NULL; 1649 struct il_tx_queue *txq; 1650 struct il_queue *q; 1651 struct il_device_cmd *out_cmd; 1652 struct il_cmd_meta *out_meta; 1653 struct il_tx_cmd *tx_cmd; 1654 int txq_id; 1655 dma_addr_t phys_addr; 1656 dma_addr_t txcmd_phys; 1657 dma_addr_t scratch_phys; 1658 u16 len, firstlen, secondlen; 1659 u16 seq_number = 0; 1660 __le16 fc; 1661 u8 hdr_len; 1662 u8 sta_id; 1663 u8 wait_write_ptr = 0; 1664 u8 tid = 0; 1665 u8 *qc = NULL; 1666 unsigned long flags; 1667 bool is_agg = false; 1668 1669 spin_lock_irqsave(&il->lock, flags); 1670 if (il_is_rfkill(il)) { 1671 D_DROP("Dropping - RF KILL\n"); 1672 goto drop_unlock; 1673 } 1674 1675 fc = hdr->frame_control; 1676 1677 #ifdef CONFIG_IWLEGACY_DEBUG 1678 if (ieee80211_is_auth(fc)) 1679 D_TX("Sending AUTH frame\n"); 1680 else if (ieee80211_is_assoc_req(fc)) 1681 D_TX("Sending ASSOC frame\n"); 1682 else if (ieee80211_is_reassoc_req(fc)) 1683 D_TX("Sending REASSOC frame\n"); 1684 #endif 1685 1686 hdr_len = ieee80211_hdrlen(fc); 1687 1688 /* For management frames use broadcast id to do not break aggregation */ 1689 if (!ieee80211_is_data(fc)) 1690 sta_id = il->hw_params.bcast_id; 1691 else { 1692 /* Find idx into station table for destination station */ 1693 sta_id = il_sta_id_or_broadcast(il, sta); 1694 1695 if (sta_id == IL_INVALID_STATION) { 1696 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1); 1697 goto drop_unlock; 1698 } 1699 } 1700 1701 D_TX("station Id %d\n", sta_id); 1702 1703 if (sta) 1704 sta_priv = (void *)sta->drv_priv; 1705 1706 if (sta_priv && sta_priv->asleep && 1707 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { 1708 /* 1709 * This sends an asynchronous command to the device, 1710 * but we can rely on it being processed before the 1711 * next frame is processed -- and the next frame to 1712 * this station is the one that will consume this 1713 * counter. 1714 * For now set the counter to just 1 since we do not 1715 * support uAPSD yet. 1716 */ 1717 il4965_sta_modify_sleep_tx_count(il, sta_id, 1); 1718 } 1719 1720 /* FIXME: remove me ? */ 1721 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1722 1723 /* Access category (AC) is also the queue number */ 1724 txq_id = skb_get_queue_mapping(skb); 1725 1726 /* irqs already disabled/saved above when locking il->lock */ 1727 spin_lock(&il->sta_lock); 1728 1729 if (ieee80211_is_data_qos(fc)) { 1730 qc = ieee80211_get_qos_ctl(hdr); 1731 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 1732 if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) { 1733 spin_unlock(&il->sta_lock); 1734 goto drop_unlock; 1735 } 1736 seq_number = il->stations[sta_id].tid[tid].seq_number; 1737 seq_number &= IEEE80211_SCTL_SEQ; 1738 hdr->seq_ctrl = 1739 hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG); 1740 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1741 seq_number += 0x10; 1742 /* aggregation is on for this <sta,tid> */ 1743 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1744 il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) { 1745 txq_id = il->stations[sta_id].tid[tid].agg.txq_id; 1746 is_agg = true; 1747 } 1748 } 1749 1750 txq = &il->txq[txq_id]; 1751 q = &txq->q; 1752 1753 if (unlikely(il_queue_space(q) < q->high_mark)) { 1754 spin_unlock(&il->sta_lock); 1755 goto drop_unlock; 1756 } 1757 1758 if (ieee80211_is_data_qos(fc)) { 1759 il->stations[sta_id].tid[tid].tfds_in_queue++; 1760 if (!ieee80211_has_morefrags(fc)) 1761 il->stations[sta_id].tid[tid].seq_number = seq_number; 1762 } 1763 1764 spin_unlock(&il->sta_lock); 1765 1766 txq->skbs[q->write_ptr] = skb; 1767 1768 /* Set up first empty entry in queue's array of Tx/cmd buffers */ 1769 out_cmd = txq->cmd[q->write_ptr]; 1770 out_meta = &txq->meta[q->write_ptr]; 1771 tx_cmd = &out_cmd->cmd.tx; 1772 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); 1773 memset(tx_cmd, 0, sizeof(struct il_tx_cmd)); 1774 1775 /* 1776 * Set up the Tx-command (not MAC!) header. 1777 * Store the chosen Tx queue and TFD idx within the sequence field; 1778 * after Tx, uCode's Tx response will return this value so driver can 1779 * locate the frame within the tx queue and do post-tx processing. 1780 */ 1781 out_cmd->hdr.cmd = C_TX; 1782 out_cmd->hdr.sequence = 1783 cpu_to_le16((u16) 1784 (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr))); 1785 1786 /* Copy MAC header from skb into command buffer */ 1787 memcpy(tx_cmd->hdr, hdr, hdr_len); 1788 1789 /* Total # bytes to be transmitted */ 1790 tx_cmd->len = cpu_to_le16((u16) skb->len); 1791 1792 if (info->control.hw_key) 1793 il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id); 1794 1795 /* TODO need this for burst mode later on */ 1796 il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id); 1797 1798 il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc); 1799 1800 /* 1801 * Use the first empty entry in this queue's command buffer array 1802 * to contain the Tx command and MAC header concatenated together 1803 * (payload data will be in another buffer). 1804 * Size of this varies, due to varying MAC header length. 1805 * If end is not dword aligned, we'll have 2 extra bytes at the end 1806 * of the MAC header (device reads on dword boundaries). 1807 * We'll tell device about this padding later. 1808 */ 1809 len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len; 1810 firstlen = (len + 3) & ~3; 1811 1812 /* Tell NIC about any 2-byte padding after MAC header */ 1813 if (firstlen != len) 1814 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; 1815 1816 /* Physical address of this Tx command's header (not MAC header!), 1817 * within command buffer array. */ 1818 txcmd_phys = 1819 pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen, 1820 PCI_DMA_BIDIRECTIONAL); 1821 if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys))) 1822 goto drop_unlock; 1823 1824 /* Set up TFD's 2nd entry to point directly to remainder of skb, 1825 * if any (802.11 null frames have no payload). */ 1826 secondlen = skb->len - hdr_len; 1827 if (secondlen > 0) { 1828 phys_addr = 1829 pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen, 1830 PCI_DMA_TODEVICE); 1831 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) 1832 goto drop_unlock; 1833 } 1834 1835 /* Add buffer containing Tx command and MAC(!) header to TFD's 1836 * first entry */ 1837 il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0); 1838 dma_unmap_addr_set(out_meta, mapping, txcmd_phys); 1839 dma_unmap_len_set(out_meta, len, firstlen); 1840 if (secondlen) 1841 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 1842 0, 0); 1843 1844 if (!ieee80211_has_morefrags(hdr->frame_control)) { 1845 txq->need_update = 1; 1846 } else { 1847 wait_write_ptr = 1; 1848 txq->need_update = 0; 1849 } 1850 1851 scratch_phys = 1852 txcmd_phys + sizeof(struct il_cmd_header) + 1853 offsetof(struct il_tx_cmd, scratch); 1854 1855 /* take back ownership of DMA buffer to enable update */ 1856 pci_dma_sync_single_for_cpu(il->pci_dev, txcmd_phys, firstlen, 1857 PCI_DMA_BIDIRECTIONAL); 1858 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); 1859 tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys); 1860 1861 il_update_stats(il, true, fc, skb->len); 1862 1863 D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence)); 1864 D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); 1865 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd)); 1866 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len); 1867 1868 /* Set up entry for this TFD in Tx byte-count array */ 1869 if (info->flags & IEEE80211_TX_CTL_AMPDU) 1870 il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len)); 1871 1872 pci_dma_sync_single_for_device(il->pci_dev, txcmd_phys, firstlen, 1873 PCI_DMA_BIDIRECTIONAL); 1874 1875 /* Tell device the write idx *just past* this latest filled TFD */ 1876 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd); 1877 il_txq_update_write_ptr(il, txq); 1878 spin_unlock_irqrestore(&il->lock, flags); 1879 1880 /* 1881 * At this point the frame is "transmitted" successfully 1882 * and we will get a TX status notification eventually, 1883 * regardless of the value of ret. "ret" only indicates 1884 * whether or not we should update the write pointer. 1885 */ 1886 1887 /* 1888 * Avoid atomic ops if it isn't an associated client. 1889 * Also, if this is a packet for aggregation, don't 1890 * increase the counter because the ucode will stop 1891 * aggregation queues when their respective station 1892 * goes to sleep. 1893 */ 1894 if (sta_priv && sta_priv->client && !is_agg) 1895 atomic_inc(&sta_priv->pending_frames); 1896 1897 if (il_queue_space(q) < q->high_mark && il->mac80211_registered) { 1898 if (wait_write_ptr) { 1899 spin_lock_irqsave(&il->lock, flags); 1900 txq->need_update = 1; 1901 il_txq_update_write_ptr(il, txq); 1902 spin_unlock_irqrestore(&il->lock, flags); 1903 } else { 1904 il_stop_queue(il, txq); 1905 } 1906 } 1907 1908 return 0; 1909 1910 drop_unlock: 1911 spin_unlock_irqrestore(&il->lock, flags); 1912 return -1; 1913 } 1914 1915 static inline int 1916 il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size) 1917 { 1918 ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma, 1919 GFP_KERNEL); 1920 if (!ptr->addr) 1921 return -ENOMEM; 1922 ptr->size = size; 1923 return 0; 1924 } 1925 1926 static inline void 1927 il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr) 1928 { 1929 if (unlikely(!ptr->addr)) 1930 return; 1931 1932 dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma); 1933 memset(ptr, 0, sizeof(*ptr)); 1934 } 1935 1936 /** 1937 * il4965_hw_txq_ctx_free - Free TXQ Context 1938 * 1939 * Destroy all TX DMA queues and structures 1940 */ 1941 void 1942 il4965_hw_txq_ctx_free(struct il_priv *il) 1943 { 1944 int txq_id; 1945 1946 /* Tx queues */ 1947 if (il->txq) { 1948 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 1949 if (txq_id == il->cmd_queue) 1950 il_cmd_queue_free(il); 1951 else 1952 il_tx_queue_free(il, txq_id); 1953 } 1954 il4965_free_dma_ptr(il, &il->kw); 1955 1956 il4965_free_dma_ptr(il, &il->scd_bc_tbls); 1957 1958 /* free tx queue structure */ 1959 il_free_txq_mem(il); 1960 } 1961 1962 /** 1963 * il4965_txq_ctx_alloc - allocate TX queue context 1964 * Allocate all Tx DMA structures and initialize them 1965 * 1966 * @param il 1967 * @return error code 1968 */ 1969 int 1970 il4965_txq_ctx_alloc(struct il_priv *il) 1971 { 1972 int ret, txq_id; 1973 unsigned long flags; 1974 1975 /* Free all tx/cmd queues and keep-warm buffer */ 1976 il4965_hw_txq_ctx_free(il); 1977 1978 ret = 1979 il4965_alloc_dma_ptr(il, &il->scd_bc_tbls, 1980 il->hw_params.scd_bc_tbls_size); 1981 if (ret) { 1982 IL_ERR("Scheduler BC Table allocation failed\n"); 1983 goto error_bc_tbls; 1984 } 1985 /* Alloc keep-warm buffer */ 1986 ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE); 1987 if (ret) { 1988 IL_ERR("Keep Warm allocation failed\n"); 1989 goto error_kw; 1990 } 1991 1992 /* allocate tx queue structure */ 1993 ret = il_alloc_txq_mem(il); 1994 if (ret) 1995 goto error; 1996 1997 spin_lock_irqsave(&il->lock, flags); 1998 1999 /* Turn off all Tx DMA fifos */ 2000 il4965_txq_set_sched(il, 0); 2001 2002 /* Tell NIC where to find the "keep warm" buffer */ 2003 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); 2004 2005 spin_unlock_irqrestore(&il->lock, flags); 2006 2007 /* Alloc and init all Tx queues, including the command queue (#4/#9) */ 2008 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) { 2009 ret = il_tx_queue_init(il, txq_id); 2010 if (ret) { 2011 IL_ERR("Tx %d queue init failed\n", txq_id); 2012 goto error; 2013 } 2014 } 2015 2016 return ret; 2017 2018 error: 2019 il4965_hw_txq_ctx_free(il); 2020 il4965_free_dma_ptr(il, &il->kw); 2021 error_kw: 2022 il4965_free_dma_ptr(il, &il->scd_bc_tbls); 2023 error_bc_tbls: 2024 return ret; 2025 } 2026 2027 void 2028 il4965_txq_ctx_reset(struct il_priv *il) 2029 { 2030 int txq_id; 2031 unsigned long flags; 2032 2033 spin_lock_irqsave(&il->lock, flags); 2034 2035 /* Turn off all Tx DMA fifos */ 2036 il4965_txq_set_sched(il, 0); 2037 /* Tell NIC where to find the "keep warm" buffer */ 2038 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); 2039 2040 spin_unlock_irqrestore(&il->lock, flags); 2041 2042 /* Alloc and init all Tx queues, including the command queue (#4) */ 2043 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2044 il_tx_queue_reset(il, txq_id); 2045 } 2046 2047 static void 2048 il4965_txq_ctx_unmap(struct il_priv *il) 2049 { 2050 int txq_id; 2051 2052 if (!il->txq) 2053 return; 2054 2055 /* Unmap DMA from host system and free skb's */ 2056 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2057 if (txq_id == il->cmd_queue) 2058 il_cmd_queue_unmap(il); 2059 else 2060 il_tx_queue_unmap(il, txq_id); 2061 } 2062 2063 /** 2064 * il4965_txq_ctx_stop - Stop all Tx DMA channels 2065 */ 2066 void 2067 il4965_txq_ctx_stop(struct il_priv *il) 2068 { 2069 int ch, ret; 2070 2071 _il_wr_prph(il, IL49_SCD_TXFACT, 0); 2072 2073 /* Stop each Tx DMA channel, and wait for it to be idle */ 2074 for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) { 2075 _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); 2076 ret = 2077 _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG, 2078 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 2079 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 2080 1000); 2081 if (ret < 0) 2082 IL_ERR("Timeout stopping DMA channel %d [0x%08x]", 2083 ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG)); 2084 } 2085 } 2086 2087 /* 2088 * Find first available (lowest unused) Tx Queue, mark it "active". 2089 * Called only when finding queue for aggregation. 2090 * Should never return anything < 7, because they should already 2091 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6) 2092 */ 2093 static int 2094 il4965_txq_ctx_activate_free(struct il_priv *il) 2095 { 2096 int txq_id; 2097 2098 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2099 if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk)) 2100 return txq_id; 2101 return -1; 2102 } 2103 2104 /** 2105 * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration 2106 */ 2107 static void 2108 il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id) 2109 { 2110 /* Simply stop the queue, but don't change any configuration; 2111 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */ 2112 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), 2113 (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | 2114 (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); 2115 } 2116 2117 /** 2118 * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue 2119 */ 2120 static int 2121 il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id) 2122 { 2123 u32 tbl_dw_addr; 2124 u32 tbl_dw; 2125 u16 scd_q2ratid; 2126 2127 scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK; 2128 2129 tbl_dw_addr = 2130 il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id); 2131 2132 tbl_dw = il_read_targ_mem(il, tbl_dw_addr); 2133 2134 if (txq_id & 0x1) 2135 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); 2136 else 2137 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); 2138 2139 il_write_targ_mem(il, tbl_dw_addr, tbl_dw); 2140 2141 return 0; 2142 } 2143 2144 /** 2145 * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue 2146 * 2147 * NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE, 2148 * i.e. it must be one of the higher queues used for aggregation 2149 */ 2150 static int 2151 il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id, 2152 int tid, u16 ssn_idx) 2153 { 2154 unsigned long flags; 2155 u16 ra_tid; 2156 int ret; 2157 2158 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || 2159 (IL49_FIRST_AMPDU_QUEUE + 2160 il->cfg->num_of_ampdu_queues <= txq_id)) { 2161 IL_WARN("queue number out of range: %d, must be %d to %d\n", 2162 txq_id, IL49_FIRST_AMPDU_QUEUE, 2163 IL49_FIRST_AMPDU_QUEUE + 2164 il->cfg->num_of_ampdu_queues - 1); 2165 return -EINVAL; 2166 } 2167 2168 ra_tid = BUILD_RAxTID(sta_id, tid); 2169 2170 /* Modify device's station table to Tx this TID */ 2171 ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid); 2172 if (ret) 2173 return ret; 2174 2175 spin_lock_irqsave(&il->lock, flags); 2176 2177 /* Stop this Tx queue before configuring it */ 2178 il4965_tx_queue_stop_scheduler(il, txq_id); 2179 2180 /* Map receiver-address / traffic-ID to this queue */ 2181 il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id); 2182 2183 /* Set this queue as a chain-building queue */ 2184 il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); 2185 2186 /* Place first TFD at idx corresponding to start sequence number. 2187 * Assumes that ssn_idx is valid (!= 0xFFF) */ 2188 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); 2189 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); 2190 il4965_set_wr_ptrs(il, txq_id, ssn_idx); 2191 2192 /* Set up Tx win size and frame limit for this queue */ 2193 il_write_targ_mem(il, 2194 il->scd_base_addr + 2195 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id), 2196 (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) 2197 & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); 2198 2199 il_write_targ_mem(il, 2200 il->scd_base_addr + 2201 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), 2202 (SCD_FRAME_LIMIT << 2203 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & 2204 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); 2205 2206 il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); 2207 2208 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */ 2209 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1); 2210 2211 spin_unlock_irqrestore(&il->lock, flags); 2212 2213 return 0; 2214 } 2215 2216 int 2217 il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif, 2218 struct ieee80211_sta *sta, u16 tid, u16 * ssn) 2219 { 2220 int sta_id; 2221 int tx_fifo; 2222 int txq_id; 2223 int ret; 2224 unsigned long flags; 2225 struct il_tid_data *tid_data; 2226 2227 /* FIXME: warning if tx fifo not found ? */ 2228 tx_fifo = il4965_get_fifo_from_tid(tid); 2229 if (unlikely(tx_fifo < 0)) 2230 return tx_fifo; 2231 2232 D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid); 2233 2234 sta_id = il_sta_id(sta); 2235 if (sta_id == IL_INVALID_STATION) { 2236 IL_ERR("Start AGG on invalid station\n"); 2237 return -ENXIO; 2238 } 2239 if (unlikely(tid >= MAX_TID_COUNT)) 2240 return -EINVAL; 2241 2242 if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) { 2243 IL_ERR("Start AGG when state is not IL_AGG_OFF !\n"); 2244 return -ENXIO; 2245 } 2246 2247 txq_id = il4965_txq_ctx_activate_free(il); 2248 if (txq_id == -1) { 2249 IL_ERR("No free aggregation queue available\n"); 2250 return -ENXIO; 2251 } 2252 2253 spin_lock_irqsave(&il->sta_lock, flags); 2254 tid_data = &il->stations[sta_id].tid[tid]; 2255 *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2256 tid_data->agg.txq_id = txq_id; 2257 il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id); 2258 spin_unlock_irqrestore(&il->sta_lock, flags); 2259 2260 ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn); 2261 if (ret) 2262 return ret; 2263 2264 spin_lock_irqsave(&il->sta_lock, flags); 2265 tid_data = &il->stations[sta_id].tid[tid]; 2266 if (tid_data->tfds_in_queue == 0) { 2267 D_HT("HW queue is empty\n"); 2268 tid_data->agg.state = IL_AGG_ON; 2269 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 2270 } else { 2271 D_HT("HW queue is NOT empty: %d packets in HW queue\n", 2272 tid_data->tfds_in_queue); 2273 tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA; 2274 } 2275 spin_unlock_irqrestore(&il->sta_lock, flags); 2276 return ret; 2277 } 2278 2279 /** 2280 * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE 2281 * il->lock must be held by the caller 2282 */ 2283 static int 2284 il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo) 2285 { 2286 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || 2287 (IL49_FIRST_AMPDU_QUEUE + 2288 il->cfg->num_of_ampdu_queues <= txq_id)) { 2289 IL_WARN("queue number out of range: %d, must be %d to %d\n", 2290 txq_id, IL49_FIRST_AMPDU_QUEUE, 2291 IL49_FIRST_AMPDU_QUEUE + 2292 il->cfg->num_of_ampdu_queues - 1); 2293 return -EINVAL; 2294 } 2295 2296 il4965_tx_queue_stop_scheduler(il, txq_id); 2297 2298 il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); 2299 2300 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); 2301 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); 2302 /* supposes that ssn_idx is valid (!= 0xFFF) */ 2303 il4965_set_wr_ptrs(il, txq_id, ssn_idx); 2304 2305 il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); 2306 il_txq_ctx_deactivate(il, txq_id); 2307 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0); 2308 2309 return 0; 2310 } 2311 2312 int 2313 il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif, 2314 struct ieee80211_sta *sta, u16 tid) 2315 { 2316 int tx_fifo_id, txq_id, sta_id, ssn; 2317 struct il_tid_data *tid_data; 2318 int write_ptr, read_ptr; 2319 unsigned long flags; 2320 2321 /* FIXME: warning if tx_fifo_id not found ? */ 2322 tx_fifo_id = il4965_get_fifo_from_tid(tid); 2323 if (unlikely(tx_fifo_id < 0)) 2324 return tx_fifo_id; 2325 2326 sta_id = il_sta_id(sta); 2327 2328 if (sta_id == IL_INVALID_STATION) { 2329 IL_ERR("Invalid station for AGG tid %d\n", tid); 2330 return -ENXIO; 2331 } 2332 2333 spin_lock_irqsave(&il->sta_lock, flags); 2334 2335 tid_data = &il->stations[sta_id].tid[tid]; 2336 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; 2337 txq_id = tid_data->agg.txq_id; 2338 2339 switch (il->stations[sta_id].tid[tid].agg.state) { 2340 case IL_EMPTYING_HW_QUEUE_ADDBA: 2341 /* 2342 * This can happen if the peer stops aggregation 2343 * again before we've had a chance to drain the 2344 * queue we selected previously, i.e. before the 2345 * session was really started completely. 2346 */ 2347 D_HT("AGG stop before setup done\n"); 2348 goto turn_off; 2349 case IL_AGG_ON: 2350 break; 2351 default: 2352 IL_WARN("Stopping AGG while state not ON or starting\n"); 2353 } 2354 2355 write_ptr = il->txq[txq_id].q.write_ptr; 2356 read_ptr = il->txq[txq_id].q.read_ptr; 2357 2358 /* The queue is not empty */ 2359 if (write_ptr != read_ptr) { 2360 D_HT("Stopping a non empty AGG HW QUEUE\n"); 2361 il->stations[sta_id].tid[tid].agg.state = 2362 IL_EMPTYING_HW_QUEUE_DELBA; 2363 spin_unlock_irqrestore(&il->sta_lock, flags); 2364 return 0; 2365 } 2366 2367 D_HT("HW queue is empty\n"); 2368 turn_off: 2369 il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF; 2370 2371 /* do not restore/save irqs */ 2372 spin_unlock(&il->sta_lock); 2373 spin_lock(&il->lock); 2374 2375 /* 2376 * the only reason this call can fail is queue number out of range, 2377 * which can happen if uCode is reloaded and all the station 2378 * information are lost. if it is outside the range, there is no need 2379 * to deactivate the uCode queue, just return "success" to allow 2380 * mac80211 to clean up it own data. 2381 */ 2382 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id); 2383 spin_unlock_irqrestore(&il->lock, flags); 2384 2385 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2386 2387 return 0; 2388 } 2389 2390 int 2391 il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id) 2392 { 2393 struct il_queue *q = &il->txq[txq_id].q; 2394 u8 *addr = il->stations[sta_id].sta.sta.addr; 2395 struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid]; 2396 2397 lockdep_assert_held(&il->sta_lock); 2398 2399 switch (il->stations[sta_id].tid[tid].agg.state) { 2400 case IL_EMPTYING_HW_QUEUE_DELBA: 2401 /* We are reclaiming the last packet of the */ 2402 /* aggregated HW queue */ 2403 if (txq_id == tid_data->agg.txq_id && 2404 q->read_ptr == q->write_ptr) { 2405 u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2406 int tx_fifo = il4965_get_fifo_from_tid(tid); 2407 D_HT("HW queue empty: continue DELBA flow\n"); 2408 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo); 2409 tid_data->agg.state = IL_AGG_OFF; 2410 ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid); 2411 } 2412 break; 2413 case IL_EMPTYING_HW_QUEUE_ADDBA: 2414 /* We are reclaiming the last packet of the queue */ 2415 if (tid_data->tfds_in_queue == 0) { 2416 D_HT("HW queue empty: continue ADDBA flow\n"); 2417 tid_data->agg.state = IL_AGG_ON; 2418 ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid); 2419 } 2420 break; 2421 } 2422 2423 return 0; 2424 } 2425 2426 static void 2427 il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1) 2428 { 2429 struct ieee80211_sta *sta; 2430 struct il_station_priv *sta_priv; 2431 2432 rcu_read_lock(); 2433 sta = ieee80211_find_sta(il->vif, addr1); 2434 if (sta) { 2435 sta_priv = (void *)sta->drv_priv; 2436 /* avoid atomic ops if this isn't a client */ 2437 if (sta_priv->client && 2438 atomic_dec_return(&sta_priv->pending_frames) == 0) 2439 ieee80211_sta_block_awake(il->hw, sta, false); 2440 } 2441 rcu_read_unlock(); 2442 } 2443 2444 static void 2445 il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg) 2446 { 2447 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 2448 2449 if (!is_agg) 2450 il4965_non_agg_tx_status(il, hdr->addr1); 2451 2452 ieee80211_tx_status_irqsafe(il->hw, skb); 2453 } 2454 2455 int 2456 il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx) 2457 { 2458 struct il_tx_queue *txq = &il->txq[txq_id]; 2459 struct il_queue *q = &txq->q; 2460 int nfreed = 0; 2461 struct ieee80211_hdr *hdr; 2462 struct sk_buff *skb; 2463 2464 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) { 2465 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, " 2466 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd, 2467 q->write_ptr, q->read_ptr); 2468 return 0; 2469 } 2470 2471 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx; 2472 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) { 2473 2474 skb = txq->skbs[txq->q.read_ptr]; 2475 2476 if (WARN_ON_ONCE(skb == NULL)) 2477 continue; 2478 2479 hdr = (struct ieee80211_hdr *) skb->data; 2480 if (ieee80211_is_data_qos(hdr->frame_control)) 2481 nfreed++; 2482 2483 il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE); 2484 2485 txq->skbs[txq->q.read_ptr] = NULL; 2486 il->ops->txq_free_tfd(il, txq); 2487 } 2488 return nfreed; 2489 } 2490 2491 /** 2492 * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack 2493 * 2494 * Go through block-ack's bitmap of ACK'd frames, update driver's record of 2495 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo. 2496 */ 2497 static int 2498 il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg, 2499 struct il_compressed_ba_resp *ba_resp) 2500 { 2501 int i, sh, ack; 2502 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl); 2503 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 2504 int successes = 0; 2505 struct ieee80211_tx_info *info; 2506 u64 bitmap, sent_bitmap; 2507 2508 if (unlikely(!agg->wait_for_ba)) { 2509 if (unlikely(ba_resp->bitmap)) 2510 IL_ERR("Received BA when not expected\n"); 2511 return -EINVAL; 2512 } 2513 2514 /* Mark that the expected block-ack response arrived */ 2515 agg->wait_for_ba = 0; 2516 D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl); 2517 2518 /* Calculate shift to align block-ack bits with our Tx win bits */ 2519 sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4); 2520 if (sh < 0) /* tbw something is wrong with indices */ 2521 sh += 0x100; 2522 2523 if (agg->frame_count > (64 - sh)) { 2524 D_TX_REPLY("more frames than bitmap size"); 2525 return -1; 2526 } 2527 2528 /* don't use 64-bit values for now */ 2529 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh; 2530 2531 /* check for success or failure according to the 2532 * transmitted bitmap and block-ack bitmap */ 2533 sent_bitmap = bitmap & agg->bitmap; 2534 2535 /* For each frame attempted in aggregation, 2536 * update driver's record of tx frame's status. */ 2537 i = 0; 2538 while (sent_bitmap) { 2539 ack = sent_bitmap & 1ULL; 2540 successes += ack; 2541 D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK", 2542 i, (agg->start_idx + i) & 0xff, agg->start_idx + i); 2543 sent_bitmap >>= 1; 2544 ++i; 2545 } 2546 2547 D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap); 2548 2549 info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]); 2550 memset(&info->status, 0, sizeof(info->status)); 2551 info->flags |= IEEE80211_TX_STAT_ACK; 2552 info->flags |= IEEE80211_TX_STAT_AMPDU; 2553 info->status.ampdu_ack_len = successes; 2554 info->status.ampdu_len = agg->frame_count; 2555 il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info); 2556 2557 return 0; 2558 } 2559 2560 static inline bool 2561 il4965_is_tx_success(u32 status) 2562 { 2563 status &= TX_STATUS_MSK; 2564 return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE); 2565 } 2566 2567 static u8 2568 il4965_find_station(struct il_priv *il, const u8 *addr) 2569 { 2570 int i; 2571 int start = 0; 2572 int ret = IL_INVALID_STATION; 2573 unsigned long flags; 2574 2575 if (il->iw_mode == NL80211_IFTYPE_ADHOC) 2576 start = IL_STA_ID; 2577 2578 if (is_broadcast_ether_addr(addr)) 2579 return il->hw_params.bcast_id; 2580 2581 spin_lock_irqsave(&il->sta_lock, flags); 2582 for (i = start; i < il->hw_params.max_stations; i++) 2583 if (il->stations[i].used && 2584 ether_addr_equal(il->stations[i].sta.sta.addr, addr)) { 2585 ret = i; 2586 goto out; 2587 } 2588 2589 D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations); 2590 2591 out: 2592 /* 2593 * It may be possible that more commands interacting with stations 2594 * arrive before we completed processing the adding of 2595 * station 2596 */ 2597 if (ret != IL_INVALID_STATION && 2598 (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) || 2599 ((il->stations[ret].used & IL_STA_UCODE_ACTIVE) && 2600 (il->stations[ret].used & IL_STA_UCODE_INPROGRESS)))) { 2601 IL_ERR("Requested station info for sta %d before ready.\n", 2602 ret); 2603 ret = IL_INVALID_STATION; 2604 } 2605 spin_unlock_irqrestore(&il->sta_lock, flags); 2606 return ret; 2607 } 2608 2609 static int 2610 il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr) 2611 { 2612 if (il->iw_mode == NL80211_IFTYPE_STATION) 2613 return IL_AP_ID; 2614 else { 2615 u8 *da = ieee80211_get_DA(hdr); 2616 2617 return il4965_find_station(il, da); 2618 } 2619 } 2620 2621 static inline u32 2622 il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp) 2623 { 2624 return le32_to_cpup(&tx_resp->u.status + 2625 tx_resp->frame_count) & IEEE80211_MAX_SN; 2626 } 2627 2628 static inline u32 2629 il4965_tx_status_to_mac80211(u32 status) 2630 { 2631 status &= TX_STATUS_MSK; 2632 2633 switch (status) { 2634 case TX_STATUS_SUCCESS: 2635 case TX_STATUS_DIRECT_DONE: 2636 return IEEE80211_TX_STAT_ACK; 2637 case TX_STATUS_FAIL_DEST_PS: 2638 return IEEE80211_TX_STAT_TX_FILTERED; 2639 default: 2640 return 0; 2641 } 2642 } 2643 2644 /** 2645 * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue 2646 */ 2647 static int 2648 il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg, 2649 struct il4965_tx_resp *tx_resp, int txq_id, 2650 u16 start_idx) 2651 { 2652 u16 status; 2653 struct agg_tx_status *frame_status = tx_resp->u.agg_status; 2654 struct ieee80211_tx_info *info = NULL; 2655 struct ieee80211_hdr *hdr = NULL; 2656 u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); 2657 int i, sh, idx; 2658 u16 seq; 2659 if (agg->wait_for_ba) 2660 D_TX_REPLY("got tx response w/o block-ack\n"); 2661 2662 agg->frame_count = tx_resp->frame_count; 2663 agg->start_idx = start_idx; 2664 agg->rate_n_flags = rate_n_flags; 2665 agg->bitmap = 0; 2666 2667 /* num frames attempted by Tx command */ 2668 if (agg->frame_count == 1) { 2669 /* Only one frame was attempted; no block-ack will arrive */ 2670 status = le16_to_cpu(frame_status[0].status); 2671 idx = start_idx; 2672 2673 D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n", 2674 agg->frame_count, agg->start_idx, idx); 2675 2676 info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]); 2677 info->status.rates[0].count = tx_resp->failure_frame + 1; 2678 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 2679 info->flags |= il4965_tx_status_to_mac80211(status); 2680 il4965_hwrate_to_tx_control(il, rate_n_flags, info); 2681 2682 D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff, 2683 tx_resp->failure_frame); 2684 D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags); 2685 2686 agg->wait_for_ba = 0; 2687 } else { 2688 /* Two or more frames were attempted; expect block-ack */ 2689 u64 bitmap = 0; 2690 int start = agg->start_idx; 2691 struct sk_buff *skb; 2692 2693 /* Construct bit-map of pending frames within Tx win */ 2694 for (i = 0; i < agg->frame_count; i++) { 2695 u16 sc; 2696 status = le16_to_cpu(frame_status[i].status); 2697 seq = le16_to_cpu(frame_status[i].sequence); 2698 idx = SEQ_TO_IDX(seq); 2699 txq_id = SEQ_TO_QUEUE(seq); 2700 2701 if (status & 2702 (AGG_TX_STATE_FEW_BYTES_MSK | 2703 AGG_TX_STATE_ABORT_MSK)) 2704 continue; 2705 2706 D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n", 2707 agg->frame_count, txq_id, idx); 2708 2709 skb = il->txq[txq_id].skbs[idx]; 2710 if (WARN_ON_ONCE(skb == NULL)) 2711 return -1; 2712 hdr = (struct ieee80211_hdr *) skb->data; 2713 2714 sc = le16_to_cpu(hdr->seq_ctrl); 2715 if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) { 2716 IL_ERR("BUG_ON idx doesn't match seq control" 2717 " idx=%d, seq_idx=%d, seq=%d\n", idx, 2718 IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl); 2719 return -1; 2720 } 2721 2722 D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx, 2723 IEEE80211_SEQ_TO_SN(sc)); 2724 2725 sh = idx - start; 2726 if (sh > 64) { 2727 sh = (start - idx) + 0xff; 2728 bitmap = bitmap << sh; 2729 sh = 0; 2730 start = idx; 2731 } else if (sh < -64) 2732 sh = 0xff - (start - idx); 2733 else if (sh < 0) { 2734 sh = start - idx; 2735 start = idx; 2736 bitmap = bitmap << sh; 2737 sh = 0; 2738 } 2739 bitmap |= 1ULL << sh; 2740 D_TX_REPLY("start=%d bitmap=0x%llx\n", start, 2741 (unsigned long long)bitmap); 2742 } 2743 2744 agg->bitmap = bitmap; 2745 agg->start_idx = start; 2746 D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n", 2747 agg->frame_count, agg->start_idx, 2748 (unsigned long long)agg->bitmap); 2749 2750 if (bitmap) 2751 agg->wait_for_ba = 1; 2752 } 2753 return 0; 2754 } 2755 2756 /** 2757 * il4965_hdl_tx - Handle standard (non-aggregation) Tx response 2758 */ 2759 static void 2760 il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb) 2761 { 2762 struct il_rx_pkt *pkt = rxb_addr(rxb); 2763 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 2764 int txq_id = SEQ_TO_QUEUE(sequence); 2765 int idx = SEQ_TO_IDX(sequence); 2766 struct il_tx_queue *txq = &il->txq[txq_id]; 2767 struct sk_buff *skb; 2768 struct ieee80211_hdr *hdr; 2769 struct ieee80211_tx_info *info; 2770 struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; 2771 u32 status = le32_to_cpu(tx_resp->u.status); 2772 int uninitialized_var(tid); 2773 int sta_id; 2774 int freed; 2775 u8 *qc = NULL; 2776 unsigned long flags; 2777 2778 if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) { 2779 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d " 2780 "is out of range [0-%d] %d %d\n", txq_id, idx, 2781 txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr); 2782 return; 2783 } 2784 2785 txq->time_stamp = jiffies; 2786 2787 skb = txq->skbs[txq->q.read_ptr]; 2788 info = IEEE80211_SKB_CB(skb); 2789 memset(&info->status, 0, sizeof(info->status)); 2790 2791 hdr = (struct ieee80211_hdr *) skb->data; 2792 if (ieee80211_is_data_qos(hdr->frame_control)) { 2793 qc = ieee80211_get_qos_ctl(hdr); 2794 tid = qc[0] & 0xf; 2795 } 2796 2797 sta_id = il4965_get_ra_sta_id(il, hdr); 2798 if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) { 2799 IL_ERR("Station not known\n"); 2800 return; 2801 } 2802 2803 /* 2804 * Firmware will not transmit frame on passive channel, if it not yet 2805 * received some valid frame on that channel. When this error happen 2806 * we have to wait until firmware will unblock itself i.e. when we 2807 * note received beacon or other frame. We unblock queues in 2808 * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed. 2809 */ 2810 if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) && 2811 il->iw_mode == NL80211_IFTYPE_STATION) { 2812 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE); 2813 D_INFO("Stopped queues - RX waiting on passive channel\n"); 2814 } 2815 2816 spin_lock_irqsave(&il->sta_lock, flags); 2817 if (txq->sched_retry) { 2818 const u32 scd_ssn = il4965_get_scd_ssn(tx_resp); 2819 struct il_ht_agg *agg = NULL; 2820 WARN_ON(!qc); 2821 2822 agg = &il->stations[sta_id].tid[tid].agg; 2823 2824 il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx); 2825 2826 /* check if BAR is needed */ 2827 if (tx_resp->frame_count == 1 && 2828 !il4965_is_tx_success(status)) 2829 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 2830 2831 if (txq->q.read_ptr != (scd_ssn & 0xff)) { 2832 idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd); 2833 D_TX_REPLY("Retry scheduler reclaim scd_ssn " 2834 "%d idx %d\n", scd_ssn, idx); 2835 freed = il4965_tx_queue_reclaim(il, txq_id, idx); 2836 if (qc) 2837 il4965_free_tfds_in_queue(il, sta_id, tid, 2838 freed); 2839 2840 if (il->mac80211_registered && 2841 il_queue_space(&txq->q) > txq->q.low_mark && 2842 agg->state != IL_EMPTYING_HW_QUEUE_DELBA) 2843 il_wake_queue(il, txq); 2844 } 2845 } else { 2846 info->status.rates[0].count = tx_resp->failure_frame + 1; 2847 info->flags |= il4965_tx_status_to_mac80211(status); 2848 il4965_hwrate_to_tx_control(il, 2849 le32_to_cpu(tx_resp->rate_n_flags), 2850 info); 2851 2852 D_TX_REPLY("TXQ %d status %s (0x%08x) " 2853 "rate_n_flags 0x%x retries %d\n", txq_id, 2854 il4965_get_tx_fail_reason(status), status, 2855 le32_to_cpu(tx_resp->rate_n_flags), 2856 tx_resp->failure_frame); 2857 2858 freed = il4965_tx_queue_reclaim(il, txq_id, idx); 2859 if (qc && likely(sta_id != IL_INVALID_STATION)) 2860 il4965_free_tfds_in_queue(il, sta_id, tid, freed); 2861 else if (sta_id == IL_INVALID_STATION) 2862 D_TX_REPLY("Station not known\n"); 2863 2864 if (il->mac80211_registered && 2865 il_queue_space(&txq->q) > txq->q.low_mark) 2866 il_wake_queue(il, txq); 2867 } 2868 if (qc && likely(sta_id != IL_INVALID_STATION)) 2869 il4965_txq_check_empty(il, sta_id, tid, txq_id); 2870 2871 il4965_check_abort_status(il, tx_resp->frame_count, status); 2872 2873 spin_unlock_irqrestore(&il->sta_lock, flags); 2874 } 2875 2876 /** 2877 * translate ucode response to mac80211 tx status control values 2878 */ 2879 void 2880 il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags, 2881 struct ieee80211_tx_info *info) 2882 { 2883 struct ieee80211_tx_rate *r = &info->status.rates[0]; 2884 2885 info->status.antenna = 2886 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 2887 if (rate_n_flags & RATE_MCS_HT_MSK) 2888 r->flags |= IEEE80211_TX_RC_MCS; 2889 if (rate_n_flags & RATE_MCS_GF_MSK) 2890 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 2891 if (rate_n_flags & RATE_MCS_HT40_MSK) 2892 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 2893 if (rate_n_flags & RATE_MCS_DUP_MSK) 2894 r->flags |= IEEE80211_TX_RC_DUP_DATA; 2895 if (rate_n_flags & RATE_MCS_SGI_MSK) 2896 r->flags |= IEEE80211_TX_RC_SHORT_GI; 2897 r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band); 2898 } 2899 2900 /** 2901 * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA 2902 * 2903 * Handles block-acknowledge notification from device, which reports success 2904 * of frames sent via aggregation. 2905 */ 2906 static void 2907 il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb) 2908 { 2909 struct il_rx_pkt *pkt = rxb_addr(rxb); 2910 struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; 2911 struct il_tx_queue *txq = NULL; 2912 struct il_ht_agg *agg; 2913 int idx; 2914 int sta_id; 2915 int tid; 2916 unsigned long flags; 2917 2918 /* "flow" corresponds to Tx queue */ 2919 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 2920 2921 /* "ssn" is start of block-ack Tx win, corresponds to idx 2922 * (in Tx queue's circular buffer) of first TFD/frame in win */ 2923 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); 2924 2925 if (scd_flow >= il->hw_params.max_txq_num) { 2926 IL_ERR("BUG_ON scd_flow is bigger than number of queues\n"); 2927 return; 2928 } 2929 2930 txq = &il->txq[scd_flow]; 2931 sta_id = ba_resp->sta_id; 2932 tid = ba_resp->tid; 2933 agg = &il->stations[sta_id].tid[tid].agg; 2934 if (unlikely(agg->txq_id != scd_flow)) { 2935 /* 2936 * FIXME: this is a uCode bug which need to be addressed, 2937 * log the information and return for now! 2938 * since it is possible happen very often and in order 2939 * not to fill the syslog, don't enable the logging by default 2940 */ 2941 D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n", 2942 scd_flow, agg->txq_id); 2943 return; 2944 } 2945 2946 /* Find idx just before block-ack win */ 2947 idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); 2948 2949 spin_lock_irqsave(&il->sta_lock, flags); 2950 2951 D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n", 2952 agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32, 2953 ba_resp->sta_id); 2954 D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = " 2955 "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl, 2956 (unsigned long long)le64_to_cpu(ba_resp->bitmap), 2957 ba_resp->scd_flow, ba_resp->scd_ssn); 2958 D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx, 2959 (unsigned long long)agg->bitmap); 2960 2961 /* Update driver's record of ACK vs. not for each frame in win */ 2962 il4965_tx_status_reply_compressed_ba(il, agg, ba_resp); 2963 2964 /* Release all TFDs before the SSN, i.e. all TFDs in front of 2965 * block-ack win (we assume that they've been successfully 2966 * transmitted ... if not, it's too late anyway). */ 2967 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) { 2968 /* calculate mac80211 ampdu sw queue to wake */ 2969 int freed = il4965_tx_queue_reclaim(il, scd_flow, idx); 2970 il4965_free_tfds_in_queue(il, sta_id, tid, freed); 2971 2972 if (il_queue_space(&txq->q) > txq->q.low_mark && 2973 il->mac80211_registered && 2974 agg->state != IL_EMPTYING_HW_QUEUE_DELBA) 2975 il_wake_queue(il, txq); 2976 2977 il4965_txq_check_empty(il, sta_id, tid, scd_flow); 2978 } 2979 2980 spin_unlock_irqrestore(&il->sta_lock, flags); 2981 } 2982 2983 #ifdef CONFIG_IWLEGACY_DEBUG 2984 const char * 2985 il4965_get_tx_fail_reason(u32 status) 2986 { 2987 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 2988 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 2989 2990 switch (status & TX_STATUS_MSK) { 2991 case TX_STATUS_SUCCESS: 2992 return "SUCCESS"; 2993 TX_STATUS_POSTPONE(DELAY); 2994 TX_STATUS_POSTPONE(FEW_BYTES); 2995 TX_STATUS_POSTPONE(QUIET_PERIOD); 2996 TX_STATUS_POSTPONE(CALC_TTAK); 2997 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 2998 TX_STATUS_FAIL(SHORT_LIMIT); 2999 TX_STATUS_FAIL(LONG_LIMIT); 3000 TX_STATUS_FAIL(FIFO_UNDERRUN); 3001 TX_STATUS_FAIL(DRAIN_FLOW); 3002 TX_STATUS_FAIL(RFKILL_FLUSH); 3003 TX_STATUS_FAIL(LIFE_EXPIRE); 3004 TX_STATUS_FAIL(DEST_PS); 3005 TX_STATUS_FAIL(HOST_ABORTED); 3006 TX_STATUS_FAIL(BT_RETRY); 3007 TX_STATUS_FAIL(STA_INVALID); 3008 TX_STATUS_FAIL(FRAG_DROPPED); 3009 TX_STATUS_FAIL(TID_DISABLE); 3010 TX_STATUS_FAIL(FIFO_FLUSHED); 3011 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); 3012 TX_STATUS_FAIL(PASSIVE_NO_RX); 3013 TX_STATUS_FAIL(NO_BEACON_ON_RADAR); 3014 } 3015 3016 return "UNKNOWN"; 3017 3018 #undef TX_STATUS_FAIL 3019 #undef TX_STATUS_POSTPONE 3020 } 3021 #endif /* CONFIG_IWLEGACY_DEBUG */ 3022 3023 static struct il_link_quality_cmd * 3024 il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id) 3025 { 3026 int i, r; 3027 struct il_link_quality_cmd *link_cmd; 3028 u32 rate_flags = 0; 3029 __le32 rate_n_flags; 3030 3031 link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL); 3032 if (!link_cmd) { 3033 IL_ERR("Unable to allocate memory for LQ cmd.\n"); 3034 return NULL; 3035 } 3036 /* Set up the rate scaling to start at selected rate, fall back 3037 * all the way down to 1M in IEEE order, and then spin on 1M */ 3038 if (il->band == NL80211_BAND_5GHZ) 3039 r = RATE_6M_IDX; 3040 else 3041 r = RATE_1M_IDX; 3042 3043 if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE) 3044 rate_flags |= RATE_MCS_CCK_MSK; 3045 3046 rate_flags |= 3047 il4965_first_antenna(il->hw_params. 3048 valid_tx_ant) << RATE_MCS_ANT_POS; 3049 rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags); 3050 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) 3051 link_cmd->rs_table[i].rate_n_flags = rate_n_flags; 3052 3053 link_cmd->general_params.single_stream_ant_msk = 3054 il4965_first_antenna(il->hw_params.valid_tx_ant); 3055 3056 link_cmd->general_params.dual_stream_ant_msk = 3057 il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params. 3058 valid_tx_ant); 3059 if (!link_cmd->general_params.dual_stream_ant_msk) { 3060 link_cmd->general_params.dual_stream_ant_msk = ANT_AB; 3061 } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) { 3062 link_cmd->general_params.dual_stream_ant_msk = 3063 il->hw_params.valid_tx_ant; 3064 } 3065 3066 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; 3067 link_cmd->agg_params.agg_time_limit = 3068 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); 3069 3070 link_cmd->sta_id = sta_id; 3071 3072 return link_cmd; 3073 } 3074 3075 /* 3076 * il4965_add_bssid_station - Add the special IBSS BSSID station 3077 * 3078 * Function sleeps. 3079 */ 3080 int 3081 il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r) 3082 { 3083 int ret; 3084 u8 sta_id; 3085 struct il_link_quality_cmd *link_cmd; 3086 unsigned long flags; 3087 3088 if (sta_id_r) 3089 *sta_id_r = IL_INVALID_STATION; 3090 3091 ret = il_add_station_common(il, addr, 0, NULL, &sta_id); 3092 if (ret) { 3093 IL_ERR("Unable to add station %pM\n", addr); 3094 return ret; 3095 } 3096 3097 if (sta_id_r) 3098 *sta_id_r = sta_id; 3099 3100 spin_lock_irqsave(&il->sta_lock, flags); 3101 il->stations[sta_id].used |= IL_STA_LOCAL; 3102 spin_unlock_irqrestore(&il->sta_lock, flags); 3103 3104 /* Set up default rate scaling table in device's station table */ 3105 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3106 if (!link_cmd) { 3107 IL_ERR("Unable to initialize rate scaling for station %pM.\n", 3108 addr); 3109 return -ENOMEM; 3110 } 3111 3112 ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true); 3113 if (ret) 3114 IL_ERR("Link quality command failed (%d)\n", ret); 3115 3116 spin_lock_irqsave(&il->sta_lock, flags); 3117 il->stations[sta_id].lq = link_cmd; 3118 spin_unlock_irqrestore(&il->sta_lock, flags); 3119 3120 return 0; 3121 } 3122 3123 static int 3124 il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty) 3125 { 3126 int i; 3127 u8 buff[sizeof(struct il_wep_cmd) + 3128 sizeof(struct il_wep_key) * WEP_KEYS_MAX]; 3129 struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff; 3130 size_t cmd_size = sizeof(struct il_wep_cmd); 3131 struct il_host_cmd cmd = { 3132 .id = C_WEPKEY, 3133 .data = wep_cmd, 3134 .flags = CMD_SYNC, 3135 }; 3136 bool not_empty = false; 3137 3138 might_sleep(); 3139 3140 memset(wep_cmd, 0, 3141 cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX)); 3142 3143 for (i = 0; i < WEP_KEYS_MAX; i++) { 3144 u8 key_size = il->_4965.wep_keys[i].key_size; 3145 3146 wep_cmd->key[i].key_idx = i; 3147 if (key_size) { 3148 wep_cmd->key[i].key_offset = i; 3149 not_empty = true; 3150 } else 3151 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET; 3152 3153 wep_cmd->key[i].key_size = key_size; 3154 memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size); 3155 } 3156 3157 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE; 3158 wep_cmd->num_keys = WEP_KEYS_MAX; 3159 3160 cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX; 3161 cmd.len = cmd_size; 3162 3163 if (not_empty || send_if_empty) 3164 return il_send_cmd(il, &cmd); 3165 else 3166 return 0; 3167 } 3168 3169 int 3170 il4965_restore_default_wep_keys(struct il_priv *il) 3171 { 3172 lockdep_assert_held(&il->mutex); 3173 3174 return il4965_static_wepkey_cmd(il, false); 3175 } 3176 3177 int 3178 il4965_remove_default_wep_key(struct il_priv *il, 3179 struct ieee80211_key_conf *keyconf) 3180 { 3181 int ret; 3182 int idx = keyconf->keyidx; 3183 3184 lockdep_assert_held(&il->mutex); 3185 3186 D_WEP("Removing default WEP key: idx=%d\n", idx); 3187 3188 memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key)); 3189 if (il_is_rfkill(il)) { 3190 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n"); 3191 /* but keys in device are clear anyway so return success */ 3192 return 0; 3193 } 3194 ret = il4965_static_wepkey_cmd(il, 1); 3195 D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret); 3196 3197 return ret; 3198 } 3199 3200 int 3201 il4965_set_default_wep_key(struct il_priv *il, 3202 struct ieee80211_key_conf *keyconf) 3203 { 3204 int ret; 3205 int len = keyconf->keylen; 3206 int idx = keyconf->keyidx; 3207 3208 lockdep_assert_held(&il->mutex); 3209 3210 if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) { 3211 D_WEP("Bad WEP key length %d\n", keyconf->keylen); 3212 return -EINVAL; 3213 } 3214 3215 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; 3216 keyconf->hw_key_idx = HW_KEY_DEFAULT; 3217 il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher; 3218 3219 il->_4965.wep_keys[idx].key_size = len; 3220 memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len); 3221 3222 ret = il4965_static_wepkey_cmd(il, false); 3223 3224 D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret); 3225 return ret; 3226 } 3227 3228 static int 3229 il4965_set_wep_dynamic_key_info(struct il_priv *il, 3230 struct ieee80211_key_conf *keyconf, u8 sta_id) 3231 { 3232 unsigned long flags; 3233 __le16 key_flags = 0; 3234 struct il_addsta_cmd sta_cmd; 3235 3236 lockdep_assert_held(&il->mutex); 3237 3238 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; 3239 3240 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK); 3241 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3242 key_flags &= ~STA_KEY_FLG_INVALID; 3243 3244 if (keyconf->keylen == WEP_KEY_LEN_128) 3245 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK; 3246 3247 if (sta_id == il->hw_params.bcast_id) 3248 key_flags |= STA_KEY_MULTICAST_MSK; 3249 3250 spin_lock_irqsave(&il->sta_lock, flags); 3251 3252 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3253 il->stations[sta_id].keyinfo.keylen = keyconf->keylen; 3254 il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx; 3255 3256 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); 3257 3258 memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key, 3259 keyconf->keylen); 3260 3261 if ((il->stations[sta_id].sta.key. 3262 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3263 il->stations[sta_id].sta.key.key_offset = 3264 il_get_free_ucode_key_idx(il); 3265 /* else, we are overriding an existing key => no need to allocated room 3266 * in uCode. */ 3267 3268 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3269 "no space for a new key"); 3270 3271 il->stations[sta_id].sta.key.key_flags = key_flags; 3272 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3273 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3274 3275 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3276 sizeof(struct il_addsta_cmd)); 3277 spin_unlock_irqrestore(&il->sta_lock, flags); 3278 3279 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3280 } 3281 3282 static int 3283 il4965_set_ccmp_dynamic_key_info(struct il_priv *il, 3284 struct ieee80211_key_conf *keyconf, u8 sta_id) 3285 { 3286 unsigned long flags; 3287 __le16 key_flags = 0; 3288 struct il_addsta_cmd sta_cmd; 3289 3290 lockdep_assert_held(&il->mutex); 3291 3292 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK); 3293 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3294 key_flags &= ~STA_KEY_FLG_INVALID; 3295 3296 if (sta_id == il->hw_params.bcast_id) 3297 key_flags |= STA_KEY_MULTICAST_MSK; 3298 3299 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 3300 3301 spin_lock_irqsave(&il->sta_lock, flags); 3302 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3303 il->stations[sta_id].keyinfo.keylen = keyconf->keylen; 3304 3305 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); 3306 3307 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen); 3308 3309 if ((il->stations[sta_id].sta.key. 3310 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3311 il->stations[sta_id].sta.key.key_offset = 3312 il_get_free_ucode_key_idx(il); 3313 /* else, we are overriding an existing key => no need to allocated room 3314 * in uCode. */ 3315 3316 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3317 "no space for a new key"); 3318 3319 il->stations[sta_id].sta.key.key_flags = key_flags; 3320 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3321 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3322 3323 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3324 sizeof(struct il_addsta_cmd)); 3325 spin_unlock_irqrestore(&il->sta_lock, flags); 3326 3327 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3328 } 3329 3330 static int 3331 il4965_set_tkip_dynamic_key_info(struct il_priv *il, 3332 struct ieee80211_key_conf *keyconf, u8 sta_id) 3333 { 3334 unsigned long flags; 3335 __le16 key_flags = 0; 3336 3337 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK); 3338 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3339 key_flags &= ~STA_KEY_FLG_INVALID; 3340 3341 if (sta_id == il->hw_params.bcast_id) 3342 key_flags |= STA_KEY_MULTICAST_MSK; 3343 3344 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 3345 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 3346 3347 spin_lock_irqsave(&il->sta_lock, flags); 3348 3349 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3350 il->stations[sta_id].keyinfo.keylen = 16; 3351 3352 if ((il->stations[sta_id].sta.key. 3353 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3354 il->stations[sta_id].sta.key.key_offset = 3355 il_get_free_ucode_key_idx(il); 3356 /* else, we are overriding an existing key => no need to allocated room 3357 * in uCode. */ 3358 3359 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3360 "no space for a new key"); 3361 3362 il->stations[sta_id].sta.key.key_flags = key_flags; 3363 3364 /* This copy is acutally not needed: we get the key with each TX */ 3365 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16); 3366 3367 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16); 3368 3369 spin_unlock_irqrestore(&il->sta_lock, flags); 3370 3371 return 0; 3372 } 3373 3374 void 3375 il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, 3376 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) 3377 { 3378 u8 sta_id; 3379 unsigned long flags; 3380 int i; 3381 3382 if (il_scan_cancel(il)) { 3383 /* cancel scan failed, just live w/ bad key and rely 3384 briefly on SW decryption */ 3385 return; 3386 } 3387 3388 sta_id = il_sta_id_or_broadcast(il, sta); 3389 if (sta_id == IL_INVALID_STATION) 3390 return; 3391 3392 spin_lock_irqsave(&il->sta_lock, flags); 3393 3394 il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32; 3395 3396 for (i = 0; i < 5; i++) 3397 il->stations[sta_id].sta.key.tkip_rx_ttak[i] = 3398 cpu_to_le16(phase1key[i]); 3399 3400 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3401 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3402 3403 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); 3404 3405 spin_unlock_irqrestore(&il->sta_lock, flags); 3406 } 3407 3408 int 3409 il4965_remove_dynamic_key(struct il_priv *il, 3410 struct ieee80211_key_conf *keyconf, u8 sta_id) 3411 { 3412 unsigned long flags; 3413 u16 key_flags; 3414 u8 keyidx; 3415 struct il_addsta_cmd sta_cmd; 3416 3417 lockdep_assert_held(&il->mutex); 3418 3419 il->_4965.key_mapping_keys--; 3420 3421 spin_lock_irqsave(&il->sta_lock, flags); 3422 key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags); 3423 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3; 3424 3425 D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id); 3426 3427 if (keyconf->keyidx != keyidx) { 3428 /* We need to remove a key with idx different that the one 3429 * in the uCode. This means that the key we need to remove has 3430 * been replaced by another one with different idx. 3431 * Don't do anything and return ok 3432 */ 3433 spin_unlock_irqrestore(&il->sta_lock, flags); 3434 return 0; 3435 } 3436 3437 if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) { 3438 IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx, 3439 key_flags); 3440 spin_unlock_irqrestore(&il->sta_lock, flags); 3441 return 0; 3442 } 3443 3444 if (!test_and_clear_bit 3445 (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table)) 3446 IL_ERR("idx %d not used in uCode key table.\n", 3447 il->stations[sta_id].sta.key.key_offset); 3448 memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key)); 3449 memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo)); 3450 il->stations[sta_id].sta.key.key_flags = 3451 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID; 3452 il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx; 3453 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3454 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3455 3456 if (il_is_rfkill(il)) { 3457 D_WEP 3458 ("Not sending C_ADD_STA command because RFKILL enabled.\n"); 3459 spin_unlock_irqrestore(&il->sta_lock, flags); 3460 return 0; 3461 } 3462 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3463 sizeof(struct il_addsta_cmd)); 3464 spin_unlock_irqrestore(&il->sta_lock, flags); 3465 3466 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3467 } 3468 3469 int 3470 il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, 3471 u8 sta_id) 3472 { 3473 int ret; 3474 3475 lockdep_assert_held(&il->mutex); 3476 3477 il->_4965.key_mapping_keys++; 3478 keyconf->hw_key_idx = HW_KEY_DYNAMIC; 3479 3480 switch (keyconf->cipher) { 3481 case WLAN_CIPHER_SUITE_CCMP: 3482 ret = 3483 il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id); 3484 break; 3485 case WLAN_CIPHER_SUITE_TKIP: 3486 ret = 3487 il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id); 3488 break; 3489 case WLAN_CIPHER_SUITE_WEP40: 3490 case WLAN_CIPHER_SUITE_WEP104: 3491 ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id); 3492 break; 3493 default: 3494 IL_ERR("Unknown alg: %s cipher = %x\n", __func__, 3495 keyconf->cipher); 3496 ret = -EINVAL; 3497 } 3498 3499 D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n", 3500 keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret); 3501 3502 return ret; 3503 } 3504 3505 /** 3506 * il4965_alloc_bcast_station - add broadcast station into driver's station table. 3507 * 3508 * This adds the broadcast station into the driver's station table 3509 * and marks it driver active, so that it will be restored to the 3510 * device at the next best time. 3511 */ 3512 int 3513 il4965_alloc_bcast_station(struct il_priv *il) 3514 { 3515 struct il_link_quality_cmd *link_cmd; 3516 unsigned long flags; 3517 u8 sta_id; 3518 3519 spin_lock_irqsave(&il->sta_lock, flags); 3520 sta_id = il_prep_station(il, il_bcast_addr, false, NULL); 3521 if (sta_id == IL_INVALID_STATION) { 3522 IL_ERR("Unable to prepare broadcast station\n"); 3523 spin_unlock_irqrestore(&il->sta_lock, flags); 3524 3525 return -EINVAL; 3526 } 3527 3528 il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE; 3529 il->stations[sta_id].used |= IL_STA_BCAST; 3530 spin_unlock_irqrestore(&il->sta_lock, flags); 3531 3532 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3533 if (!link_cmd) { 3534 IL_ERR 3535 ("Unable to initialize rate scaling for bcast station.\n"); 3536 return -ENOMEM; 3537 } 3538 3539 spin_lock_irqsave(&il->sta_lock, flags); 3540 il->stations[sta_id].lq = link_cmd; 3541 spin_unlock_irqrestore(&il->sta_lock, flags); 3542 3543 return 0; 3544 } 3545 3546 /** 3547 * il4965_update_bcast_station - update broadcast station's LQ command 3548 * 3549 * Only used by iwl4965. Placed here to have all bcast station management 3550 * code together. 3551 */ 3552 static int 3553 il4965_update_bcast_station(struct il_priv *il) 3554 { 3555 unsigned long flags; 3556 struct il_link_quality_cmd *link_cmd; 3557 u8 sta_id = il->hw_params.bcast_id; 3558 3559 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3560 if (!link_cmd) { 3561 IL_ERR("Unable to initialize rate scaling for bcast sta.\n"); 3562 return -ENOMEM; 3563 } 3564 3565 spin_lock_irqsave(&il->sta_lock, flags); 3566 if (il->stations[sta_id].lq) 3567 kfree(il->stations[sta_id].lq); 3568 else 3569 D_INFO("Bcast sta rate scaling has not been initialized.\n"); 3570 il->stations[sta_id].lq = link_cmd; 3571 spin_unlock_irqrestore(&il->sta_lock, flags); 3572 3573 return 0; 3574 } 3575 3576 int 3577 il4965_update_bcast_stations(struct il_priv *il) 3578 { 3579 return il4965_update_bcast_station(il); 3580 } 3581 3582 /** 3583 * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table 3584 */ 3585 int 3586 il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid) 3587 { 3588 unsigned long flags; 3589 struct il_addsta_cmd sta_cmd; 3590 3591 lockdep_assert_held(&il->mutex); 3592 3593 /* Remove "disable" flag, to enable Tx for this TID */ 3594 spin_lock_irqsave(&il->sta_lock, flags); 3595 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; 3596 il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); 3597 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3598 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3599 sizeof(struct il_addsta_cmd)); 3600 spin_unlock_irqrestore(&il->sta_lock, flags); 3601 3602 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3603 } 3604 3605 int 3606 il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid, 3607 u16 ssn) 3608 { 3609 unsigned long flags; 3610 int sta_id; 3611 struct il_addsta_cmd sta_cmd; 3612 3613 lockdep_assert_held(&il->mutex); 3614 3615 sta_id = il_sta_id(sta); 3616 if (sta_id == IL_INVALID_STATION) 3617 return -ENXIO; 3618 3619 spin_lock_irqsave(&il->sta_lock, flags); 3620 il->stations[sta_id].sta.station_flags_msk = 0; 3621 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; 3622 il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid; 3623 il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); 3624 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3625 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3626 sizeof(struct il_addsta_cmd)); 3627 spin_unlock_irqrestore(&il->sta_lock, flags); 3628 3629 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3630 } 3631 3632 int 3633 il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid) 3634 { 3635 unsigned long flags; 3636 int sta_id; 3637 struct il_addsta_cmd sta_cmd; 3638 3639 lockdep_assert_held(&il->mutex); 3640 3641 sta_id = il_sta_id(sta); 3642 if (sta_id == IL_INVALID_STATION) { 3643 IL_ERR("Invalid station for AGG tid %d\n", tid); 3644 return -ENXIO; 3645 } 3646 3647 spin_lock_irqsave(&il->sta_lock, flags); 3648 il->stations[sta_id].sta.station_flags_msk = 0; 3649 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; 3650 il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid; 3651 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3652 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3653 sizeof(struct il_addsta_cmd)); 3654 spin_unlock_irqrestore(&il->sta_lock, flags); 3655 3656 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3657 } 3658 3659 void 3660 il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt) 3661 { 3662 unsigned long flags; 3663 3664 spin_lock_irqsave(&il->sta_lock, flags); 3665 il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK; 3666 il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK; 3667 il->stations[sta_id].sta.sta.modify_mask = 3668 STA_MODIFY_SLEEP_TX_COUNT_MSK; 3669 il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt); 3670 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3671 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); 3672 spin_unlock_irqrestore(&il->sta_lock, flags); 3673 3674 } 3675 3676 void 3677 il4965_update_chain_flags(struct il_priv *il) 3678 { 3679 if (il->ops->set_rxon_chain) { 3680 il->ops->set_rxon_chain(il); 3681 if (il->active.rx_chain != il->staging.rx_chain) 3682 il_commit_rxon(il); 3683 } 3684 } 3685 3686 static void 3687 il4965_clear_free_frames(struct il_priv *il) 3688 { 3689 struct list_head *element; 3690 3691 D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count); 3692 3693 while (!list_empty(&il->free_frames)) { 3694 element = il->free_frames.next; 3695 list_del(element); 3696 kfree(list_entry(element, struct il_frame, list)); 3697 il->frames_count--; 3698 } 3699 3700 if (il->frames_count) { 3701 IL_WARN("%d frames still in use. Did we lose one?\n", 3702 il->frames_count); 3703 il->frames_count = 0; 3704 } 3705 } 3706 3707 static struct il_frame * 3708 il4965_get_free_frame(struct il_priv *il) 3709 { 3710 struct il_frame *frame; 3711 struct list_head *element; 3712 if (list_empty(&il->free_frames)) { 3713 frame = kzalloc(sizeof(*frame), GFP_KERNEL); 3714 if (!frame) { 3715 IL_ERR("Could not allocate frame!\n"); 3716 return NULL; 3717 } 3718 3719 il->frames_count++; 3720 return frame; 3721 } 3722 3723 element = il->free_frames.next; 3724 list_del(element); 3725 return list_entry(element, struct il_frame, list); 3726 } 3727 3728 static void 3729 il4965_free_frame(struct il_priv *il, struct il_frame *frame) 3730 { 3731 memset(frame, 0, sizeof(*frame)); 3732 list_add(&frame->list, &il->free_frames); 3733 } 3734 3735 static u32 3736 il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr, 3737 int left) 3738 { 3739 lockdep_assert_held(&il->mutex); 3740 3741 if (!il->beacon_skb) 3742 return 0; 3743 3744 if (il->beacon_skb->len > left) 3745 return 0; 3746 3747 memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len); 3748 3749 return il->beacon_skb->len; 3750 } 3751 3752 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */ 3753 static void 3754 il4965_set_beacon_tim(struct il_priv *il, 3755 struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon, 3756 u32 frame_size) 3757 { 3758 u16 tim_idx; 3759 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 3760 3761 /* 3762 * The idx is relative to frame start but we start looking at the 3763 * variable-length part of the beacon. 3764 */ 3765 tim_idx = mgmt->u.beacon.variable - beacon; 3766 3767 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 3768 while ((tim_idx < (frame_size - 2)) && 3769 (beacon[tim_idx] != WLAN_EID_TIM)) 3770 tim_idx += beacon[tim_idx + 1] + 2; 3771 3772 /* If TIM field was found, set variables */ 3773 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 3774 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx); 3775 tx_beacon_cmd->tim_size = beacon[tim_idx + 1]; 3776 } else 3777 IL_WARN("Unable to find TIM Element in beacon\n"); 3778 } 3779 3780 static unsigned int 3781 il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame) 3782 { 3783 struct il_tx_beacon_cmd *tx_beacon_cmd; 3784 u32 frame_size; 3785 u32 rate_flags; 3786 u32 rate; 3787 /* 3788 * We have to set up the TX command, the TX Beacon command, and the 3789 * beacon contents. 3790 */ 3791 3792 lockdep_assert_held(&il->mutex); 3793 3794 if (!il->beacon_enabled) { 3795 IL_ERR("Trying to build beacon without beaconing enabled\n"); 3796 return 0; 3797 } 3798 3799 /* Initialize memory */ 3800 tx_beacon_cmd = &frame->u.beacon; 3801 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); 3802 3803 /* Set up TX beacon contents */ 3804 frame_size = 3805 il4965_fill_beacon_frame(il, tx_beacon_cmd->frame, 3806 sizeof(frame->u) - sizeof(*tx_beacon_cmd)); 3807 if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE)) 3808 return 0; 3809 if (!frame_size) 3810 return 0; 3811 3812 /* Set up TX command fields */ 3813 tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size); 3814 tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id; 3815 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 3816 tx_beacon_cmd->tx.tx_flags = 3817 TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK | 3818 TX_CMD_FLG_STA_RATE_MSK; 3819 3820 /* Set up TX beacon command fields */ 3821 il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame, 3822 frame_size); 3823 3824 /* Set up packet rate and flags */ 3825 rate = il_get_lowest_plcp(il); 3826 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); 3827 rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; 3828 if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE)) 3829 rate_flags |= RATE_MCS_CCK_MSK; 3830 tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags); 3831 3832 return sizeof(*tx_beacon_cmd) + frame_size; 3833 } 3834 3835 int 3836 il4965_send_beacon_cmd(struct il_priv *il) 3837 { 3838 struct il_frame *frame; 3839 unsigned int frame_size; 3840 int rc; 3841 3842 frame = il4965_get_free_frame(il); 3843 if (!frame) { 3844 IL_ERR("Could not obtain free frame buffer for beacon " 3845 "command.\n"); 3846 return -ENOMEM; 3847 } 3848 3849 frame_size = il4965_hw_get_beacon_cmd(il, frame); 3850 if (!frame_size) { 3851 IL_ERR("Error configuring the beacon command\n"); 3852 il4965_free_frame(il, frame); 3853 return -EINVAL; 3854 } 3855 3856 rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]); 3857 3858 il4965_free_frame(il, frame); 3859 3860 return rc; 3861 } 3862 3863 static inline dma_addr_t 3864 il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx) 3865 { 3866 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3867 3868 dma_addr_t addr = get_unaligned_le32(&tb->lo); 3869 if (sizeof(dma_addr_t) > sizeof(u32)) 3870 addr |= 3871 ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 3872 16; 3873 3874 return addr; 3875 } 3876 3877 static inline u16 3878 il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx) 3879 { 3880 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3881 3882 return le16_to_cpu(tb->hi_n_len) >> 4; 3883 } 3884 3885 static inline void 3886 il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len) 3887 { 3888 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3889 u16 hi_n_len = len << 4; 3890 3891 put_unaligned_le32(addr, &tb->lo); 3892 if (sizeof(dma_addr_t) > sizeof(u32)) 3893 hi_n_len |= ((addr >> 16) >> 16) & 0xF; 3894 3895 tb->hi_n_len = cpu_to_le16(hi_n_len); 3896 3897 tfd->num_tbs = idx + 1; 3898 } 3899 3900 static inline u8 3901 il4965_tfd_get_num_tbs(struct il_tfd *tfd) 3902 { 3903 return tfd->num_tbs & 0x1f; 3904 } 3905 3906 /** 3907 * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] 3908 * @il - driver ilate data 3909 * @txq - tx queue 3910 * 3911 * Does NOT advance any TFD circular buffer read/write idxes 3912 * Does NOT free the TFD itself (which is within circular buffer) 3913 */ 3914 void 3915 il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq) 3916 { 3917 struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds; 3918 struct il_tfd *tfd; 3919 struct pci_dev *dev = il->pci_dev; 3920 int idx = txq->q.read_ptr; 3921 int i; 3922 int num_tbs; 3923 3924 tfd = &tfd_tmp[idx]; 3925 3926 /* Sanity check on number of chunks */ 3927 num_tbs = il4965_tfd_get_num_tbs(tfd); 3928 3929 if (num_tbs >= IL_NUM_OF_TBS) { 3930 IL_ERR("Too many chunks: %i\n", num_tbs); 3931 /* @todo issue fatal error, it is quite serious situation */ 3932 return; 3933 } 3934 3935 /* Unmap tx_cmd */ 3936 if (num_tbs) 3937 pci_unmap_single(dev, dma_unmap_addr(&txq->meta[idx], mapping), 3938 dma_unmap_len(&txq->meta[idx], len), 3939 PCI_DMA_BIDIRECTIONAL); 3940 3941 /* Unmap chunks, if any. */ 3942 for (i = 1; i < num_tbs; i++) 3943 pci_unmap_single(dev, il4965_tfd_tb_get_addr(tfd, i), 3944 il4965_tfd_tb_get_len(tfd, i), 3945 PCI_DMA_TODEVICE); 3946 3947 /* free SKB */ 3948 if (txq->skbs) { 3949 struct sk_buff *skb = txq->skbs[txq->q.read_ptr]; 3950 3951 /* can be called from irqs-disabled context */ 3952 if (skb) { 3953 dev_kfree_skb_any(skb); 3954 txq->skbs[txq->q.read_ptr] = NULL; 3955 } 3956 } 3957 } 3958 3959 int 3960 il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq, 3961 dma_addr_t addr, u16 len, u8 reset, u8 pad) 3962 { 3963 struct il_queue *q; 3964 struct il_tfd *tfd, *tfd_tmp; 3965 u32 num_tbs; 3966 3967 q = &txq->q; 3968 tfd_tmp = (struct il_tfd *)txq->tfds; 3969 tfd = &tfd_tmp[q->write_ptr]; 3970 3971 if (reset) 3972 memset(tfd, 0, sizeof(*tfd)); 3973 3974 num_tbs = il4965_tfd_get_num_tbs(tfd); 3975 3976 /* Each TFD can point to a maximum 20 Tx buffers */ 3977 if (num_tbs >= IL_NUM_OF_TBS) { 3978 IL_ERR("Error can not send more than %d chunks\n", 3979 IL_NUM_OF_TBS); 3980 return -EINVAL; 3981 } 3982 3983 BUG_ON(addr & ~DMA_BIT_MASK(36)); 3984 if (unlikely(addr & ~IL_TX_DMA_MASK)) 3985 IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr); 3986 3987 il4965_tfd_set_tb(tfd, num_tbs, addr, len); 3988 3989 return 0; 3990 } 3991 3992 /* 3993 * Tell nic where to find circular buffer of Tx Frame Descriptors for 3994 * given Tx queue, and enable the DMA channel used for that queue. 3995 * 3996 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA 3997 * channels supported in hardware. 3998 */ 3999 int 4000 il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq) 4001 { 4002 int txq_id = txq->q.id; 4003 4004 /* Circular buffer (TFD queue in DRAM) physical base address */ 4005 il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8); 4006 4007 return 0; 4008 } 4009 4010 /****************************************************************************** 4011 * 4012 * Generic RX handler implementations 4013 * 4014 ******************************************************************************/ 4015 static void 4016 il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb) 4017 { 4018 struct il_rx_pkt *pkt = rxb_addr(rxb); 4019 struct il_alive_resp *palive; 4020 struct delayed_work *pwork; 4021 4022 palive = &pkt->u.alive_frame; 4023 4024 D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n", 4025 palive->is_valid, palive->ver_type, palive->ver_subtype); 4026 4027 if (palive->ver_subtype == INITIALIZE_SUBTYPE) { 4028 D_INFO("Initialization Alive received.\n"); 4029 memcpy(&il->card_alive_init, &pkt->u.alive_frame, 4030 sizeof(struct il_init_alive_resp)); 4031 pwork = &il->init_alive_start; 4032 } else { 4033 D_INFO("Runtime Alive received.\n"); 4034 memcpy(&il->card_alive, &pkt->u.alive_frame, 4035 sizeof(struct il_alive_resp)); 4036 pwork = &il->alive_start; 4037 } 4038 4039 /* We delay the ALIVE response by 5ms to 4040 * give the HW RF Kill time to activate... */ 4041 if (palive->is_valid == UCODE_VALID_OK) 4042 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5)); 4043 else 4044 IL_WARN("uCode did not respond OK.\n"); 4045 } 4046 4047 /** 4048 * il4965_bg_stats_periodic - Timer callback to queue stats 4049 * 4050 * This callback is provided in order to send a stats request. 4051 * 4052 * This timer function is continually reset to execute within 4053 * 60 seconds since the last N_STATS was received. We need to 4054 * ensure we receive the stats in order to update the temperature 4055 * used for calibrating the TXPOWER. 4056 */ 4057 static void 4058 il4965_bg_stats_periodic(struct timer_list *t) 4059 { 4060 struct il_priv *il = from_timer(il, t, stats_periodic); 4061 4062 if (test_bit(S_EXIT_PENDING, &il->status)) 4063 return; 4064 4065 /* dont send host command if rf-kill is on */ 4066 if (!il_is_ready_rf(il)) 4067 return; 4068 4069 il_send_stats_request(il, CMD_ASYNC, false); 4070 } 4071 4072 static void 4073 il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb) 4074 { 4075 struct il_rx_pkt *pkt = rxb_addr(rxb); 4076 struct il4965_beacon_notif *beacon = 4077 (struct il4965_beacon_notif *)pkt->u.raw; 4078 #ifdef CONFIG_IWLEGACY_DEBUG 4079 u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); 4080 4081 D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n", 4082 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK, 4083 beacon->beacon_notify_hdr.failure_frame, 4084 le32_to_cpu(beacon->ibss_mgr_status), 4085 le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate); 4086 #endif 4087 il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); 4088 } 4089 4090 static void 4091 il4965_perform_ct_kill_task(struct il_priv *il) 4092 { 4093 unsigned long flags; 4094 4095 D_POWER("Stop all queues\n"); 4096 4097 if (il->mac80211_registered) 4098 ieee80211_stop_queues(il->hw); 4099 4100 _il_wr(il, CSR_UCODE_DRV_GP1_SET, 4101 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); 4102 _il_rd(il, CSR_UCODE_DRV_GP1); 4103 4104 spin_lock_irqsave(&il->reg_lock, flags); 4105 if (likely(_il_grab_nic_access(il))) 4106 _il_release_nic_access(il); 4107 spin_unlock_irqrestore(&il->reg_lock, flags); 4108 } 4109 4110 /* Handle notification from uCode that card's power state is changing 4111 * due to software, hardware, or critical temperature RFKILL */ 4112 static void 4113 il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb) 4114 { 4115 struct il_rx_pkt *pkt = rxb_addr(rxb); 4116 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); 4117 unsigned long status = il->status; 4118 4119 D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n", 4120 (flags & HW_CARD_DISABLED) ? "Kill" : "On", 4121 (flags & SW_CARD_DISABLED) ? "Kill" : "On", 4122 (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached"); 4123 4124 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) { 4125 4126 _il_wr(il, CSR_UCODE_DRV_GP1_SET, 4127 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 4128 4129 il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); 4130 4131 if (!(flags & RXON_CARD_DISABLED)) { 4132 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, 4133 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 4134 il_wr(il, HBUS_TARG_MBX_C, 4135 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); 4136 } 4137 } 4138 4139 if (flags & CT_CARD_DISABLED) 4140 il4965_perform_ct_kill_task(il); 4141 4142 if (flags & HW_CARD_DISABLED) 4143 set_bit(S_RFKILL, &il->status); 4144 else 4145 clear_bit(S_RFKILL, &il->status); 4146 4147 if (!(flags & RXON_CARD_DISABLED)) 4148 il_scan_cancel(il); 4149 4150 if ((test_bit(S_RFKILL, &status) != 4151 test_bit(S_RFKILL, &il->status))) 4152 wiphy_rfkill_set_hw_state(il->hw->wiphy, 4153 test_bit(S_RFKILL, &il->status)); 4154 else 4155 wake_up(&il->wait_command_queue); 4156 } 4157 4158 /** 4159 * il4965_setup_handlers - Initialize Rx handler callbacks 4160 * 4161 * Setup the RX handlers for each of the reply types sent from the uCode 4162 * to the host. 4163 * 4164 * This function chains into the hardware specific files for them to setup 4165 * any hardware specific handlers as well. 4166 */ 4167 static void 4168 il4965_setup_handlers(struct il_priv *il) 4169 { 4170 il->handlers[N_ALIVE] = il4965_hdl_alive; 4171 il->handlers[N_ERROR] = il_hdl_error; 4172 il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa; 4173 il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement; 4174 il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep; 4175 il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats; 4176 il->handlers[N_BEACON] = il4965_hdl_beacon; 4177 4178 /* 4179 * The same handler is used for both the REPLY to a discrete 4180 * stats request from the host as well as for the periodic 4181 * stats notifications (after received beacons) from the uCode. 4182 */ 4183 il->handlers[C_STATS] = il4965_hdl_c_stats; 4184 il->handlers[N_STATS] = il4965_hdl_stats; 4185 4186 il_setup_rx_scan_handlers(il); 4187 4188 /* status change handler */ 4189 il->handlers[N_CARD_STATE] = il4965_hdl_card_state; 4190 4191 il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon; 4192 /* Rx handlers */ 4193 il->handlers[N_RX_PHY] = il4965_hdl_rx_phy; 4194 il->handlers[N_RX_MPDU] = il4965_hdl_rx; 4195 il->handlers[N_RX] = il4965_hdl_rx; 4196 /* block ack */ 4197 il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba; 4198 /* Tx response */ 4199 il->handlers[C_TX] = il4965_hdl_tx; 4200 } 4201 4202 /** 4203 * il4965_rx_handle - Main entry function for receiving responses from uCode 4204 * 4205 * Uses the il->handlers callback function array to invoke 4206 * the appropriate handlers, including command responses, 4207 * frame-received notifications, and other notifications. 4208 */ 4209 void 4210 il4965_rx_handle(struct il_priv *il) 4211 { 4212 struct il_rx_buf *rxb; 4213 struct il_rx_pkt *pkt; 4214 struct il_rx_queue *rxq = &il->rxq; 4215 u32 r, i; 4216 int reclaim; 4217 unsigned long flags; 4218 u8 fill_rx = 0; 4219 u32 count = 8; 4220 int total_empty; 4221 4222 /* uCode's read idx (stored in shared DRAM) indicates the last Rx 4223 * buffer that the driver may process (last buffer filled by ucode). */ 4224 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; 4225 i = rxq->read; 4226 4227 /* Rx interrupt, but nothing sent from uCode */ 4228 if (i == r) 4229 D_RX("r = %d, i = %d\n", r, i); 4230 4231 /* calculate total frames need to be restock after handling RX */ 4232 total_empty = r - rxq->write_actual; 4233 if (total_empty < 0) 4234 total_empty += RX_QUEUE_SIZE; 4235 4236 if (total_empty > (RX_QUEUE_SIZE / 2)) 4237 fill_rx = 1; 4238 4239 while (i != r) { 4240 int len; 4241 4242 rxb = rxq->queue[i]; 4243 4244 /* If an RXB doesn't have a Rx queue slot associated with it, 4245 * then a bug has been introduced in the queue refilling 4246 * routines -- catch it here */ 4247 BUG_ON(rxb == NULL); 4248 4249 rxq->queue[i] = NULL; 4250 4251 pci_unmap_page(il->pci_dev, rxb->page_dma, 4252 PAGE_SIZE << il->hw_params.rx_page_order, 4253 PCI_DMA_FROMDEVICE); 4254 pkt = rxb_addr(rxb); 4255 4256 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK; 4257 len += sizeof(u32); /* account for status word */ 4258 4259 reclaim = il_need_reclaim(il, pkt); 4260 4261 /* Based on type of command response or notification, 4262 * handle those that need handling via function in 4263 * handlers table. See il4965_setup_handlers() */ 4264 if (il->handlers[pkt->hdr.cmd]) { 4265 D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i, 4266 il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); 4267 il->isr_stats.handlers[pkt->hdr.cmd]++; 4268 il->handlers[pkt->hdr.cmd] (il, rxb); 4269 } else { 4270 /* No handling needed */ 4271 D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r, 4272 i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); 4273 } 4274 4275 /* 4276 * XXX: After here, we should always check rxb->page 4277 * against NULL before touching it or its virtual 4278 * memory (pkt). Because some handler might have 4279 * already taken or freed the pages. 4280 */ 4281 4282 if (reclaim) { 4283 /* Invoke any callbacks, transfer the buffer to caller, 4284 * and fire off the (possibly) blocking il_send_cmd() 4285 * as we reclaim the driver command queue */ 4286 if (rxb->page) 4287 il_tx_cmd_complete(il, rxb); 4288 else 4289 IL_WARN("Claim null rxb?\n"); 4290 } 4291 4292 /* Reuse the page if possible. For notification packets and 4293 * SKBs that fail to Rx correctly, add them back into the 4294 * rx_free list for reuse later. */ 4295 spin_lock_irqsave(&rxq->lock, flags); 4296 if (rxb->page != NULL) { 4297 rxb->page_dma = 4298 pci_map_page(il->pci_dev, rxb->page, 0, 4299 PAGE_SIZE << il->hw_params. 4300 rx_page_order, PCI_DMA_FROMDEVICE); 4301 4302 if (unlikely(pci_dma_mapping_error(il->pci_dev, 4303 rxb->page_dma))) { 4304 __il_free_pages(il, rxb->page); 4305 rxb->page = NULL; 4306 list_add_tail(&rxb->list, &rxq->rx_used); 4307 } else { 4308 list_add_tail(&rxb->list, &rxq->rx_free); 4309 rxq->free_count++; 4310 } 4311 } else 4312 list_add_tail(&rxb->list, &rxq->rx_used); 4313 4314 spin_unlock_irqrestore(&rxq->lock, flags); 4315 4316 i = (i + 1) & RX_QUEUE_MASK; 4317 /* If there are a lot of unused frames, 4318 * restock the Rx queue so ucode wont assert. */ 4319 if (fill_rx) { 4320 count++; 4321 if (count >= 8) { 4322 rxq->read = i; 4323 il4965_rx_replenish_now(il); 4324 count = 0; 4325 } 4326 } 4327 } 4328 4329 /* Backtrack one entry */ 4330 rxq->read = i; 4331 if (fill_rx) 4332 il4965_rx_replenish_now(il); 4333 else 4334 il4965_rx_queue_restock(il); 4335 } 4336 4337 /* call this function to flush any scheduled tasklet */ 4338 static inline void 4339 il4965_synchronize_irq(struct il_priv *il) 4340 { 4341 /* wait to make sure we flush pending tasklet */ 4342 synchronize_irq(il->pci_dev->irq); 4343 tasklet_kill(&il->irq_tasklet); 4344 } 4345 4346 static void 4347 il4965_irq_tasklet(unsigned long data) 4348 { 4349 struct il_priv *il = (struct il_priv *)data; 4350 u32 inta, handled = 0; 4351 u32 inta_fh; 4352 unsigned long flags; 4353 u32 i; 4354 #ifdef CONFIG_IWLEGACY_DEBUG 4355 u32 inta_mask; 4356 #endif 4357 4358 spin_lock_irqsave(&il->lock, flags); 4359 4360 /* Ack/clear/reset pending uCode interrupts. 4361 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, 4362 * and will clear only when CSR_FH_INT_STATUS gets cleared. */ 4363 inta = _il_rd(il, CSR_INT); 4364 _il_wr(il, CSR_INT, inta); 4365 4366 /* Ack/clear/reset pending flow-handler (DMA) interrupts. 4367 * Any new interrupts that happen after this, either while we're 4368 * in this tasklet, or later, will show up in next ISR/tasklet. */ 4369 inta_fh = _il_rd(il, CSR_FH_INT_STATUS); 4370 _il_wr(il, CSR_FH_INT_STATUS, inta_fh); 4371 4372 #ifdef CONFIG_IWLEGACY_DEBUG 4373 if (il_get_debug_level(il) & IL_DL_ISR) { 4374 /* just for debug */ 4375 inta_mask = _il_rd(il, CSR_INT_MASK); 4376 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, 4377 inta_mask, inta_fh); 4378 } 4379 #endif 4380 4381 spin_unlock_irqrestore(&il->lock, flags); 4382 4383 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not 4384 * atomic, make sure that inta covers all the interrupts that 4385 * we've discovered, even if FH interrupt came in just after 4386 * reading CSR_INT. */ 4387 if (inta_fh & CSR49_FH_INT_RX_MASK) 4388 inta |= CSR_INT_BIT_FH_RX; 4389 if (inta_fh & CSR49_FH_INT_TX_MASK) 4390 inta |= CSR_INT_BIT_FH_TX; 4391 4392 /* Now service all interrupt bits discovered above. */ 4393 if (inta & CSR_INT_BIT_HW_ERR) { 4394 IL_ERR("Hardware error detected. Restarting.\n"); 4395 4396 /* Tell the device to stop sending interrupts */ 4397 il_disable_interrupts(il); 4398 4399 il->isr_stats.hw++; 4400 il_irq_handle_error(il); 4401 4402 handled |= CSR_INT_BIT_HW_ERR; 4403 4404 return; 4405 } 4406 #ifdef CONFIG_IWLEGACY_DEBUG 4407 if (il_get_debug_level(il) & (IL_DL_ISR)) { 4408 /* NIC fires this, but we don't use it, redundant with WAKEUP */ 4409 if (inta & CSR_INT_BIT_SCD) { 4410 D_ISR("Scheduler finished to transmit " 4411 "the frame/frames.\n"); 4412 il->isr_stats.sch++; 4413 } 4414 4415 /* Alive notification via Rx interrupt will do the real work */ 4416 if (inta & CSR_INT_BIT_ALIVE) { 4417 D_ISR("Alive interrupt\n"); 4418 il->isr_stats.alive++; 4419 } 4420 } 4421 #endif 4422 /* Safely ignore these bits for debug checks below */ 4423 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); 4424 4425 /* HW RF KILL switch toggled */ 4426 if (inta & CSR_INT_BIT_RF_KILL) { 4427 int hw_rf_kill = 0; 4428 4429 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) 4430 hw_rf_kill = 1; 4431 4432 IL_WARN("RF_KILL bit toggled to %s.\n", 4433 hw_rf_kill ? "disable radio" : "enable radio"); 4434 4435 il->isr_stats.rfkill++; 4436 4437 /* driver only loads ucode once setting the interface up. 4438 * the driver allows loading the ucode even if the radio 4439 * is killed. Hence update the killswitch state here. The 4440 * rfkill handler will care about restarting if needed. 4441 */ 4442 if (hw_rf_kill) { 4443 set_bit(S_RFKILL, &il->status); 4444 } else { 4445 clear_bit(S_RFKILL, &il->status); 4446 il_force_reset(il, true); 4447 } 4448 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill); 4449 4450 handled |= CSR_INT_BIT_RF_KILL; 4451 } 4452 4453 /* Chip got too hot and stopped itself */ 4454 if (inta & CSR_INT_BIT_CT_KILL) { 4455 IL_ERR("Microcode CT kill error detected.\n"); 4456 il->isr_stats.ctkill++; 4457 handled |= CSR_INT_BIT_CT_KILL; 4458 } 4459 4460 /* Error detected by uCode */ 4461 if (inta & CSR_INT_BIT_SW_ERR) { 4462 IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n", 4463 inta); 4464 il->isr_stats.sw++; 4465 il_irq_handle_error(il); 4466 handled |= CSR_INT_BIT_SW_ERR; 4467 } 4468 4469 /* 4470 * uCode wakes up after power-down sleep. 4471 * Tell device about any new tx or host commands enqueued, 4472 * and about any Rx buffers made available while asleep. 4473 */ 4474 if (inta & CSR_INT_BIT_WAKEUP) { 4475 D_ISR("Wakeup interrupt\n"); 4476 il_rx_queue_update_write_ptr(il, &il->rxq); 4477 for (i = 0; i < il->hw_params.max_txq_num; i++) 4478 il_txq_update_write_ptr(il, &il->txq[i]); 4479 il->isr_stats.wakeup++; 4480 handled |= CSR_INT_BIT_WAKEUP; 4481 } 4482 4483 /* All uCode command responses, including Tx command responses, 4484 * Rx "responses" (frame-received notification), and other 4485 * notifications from uCode come through here*/ 4486 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { 4487 il4965_rx_handle(il); 4488 il->isr_stats.rx++; 4489 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); 4490 } 4491 4492 /* This "Tx" DMA channel is used only for loading uCode */ 4493 if (inta & CSR_INT_BIT_FH_TX) { 4494 D_ISR("uCode load interrupt\n"); 4495 il->isr_stats.tx++; 4496 handled |= CSR_INT_BIT_FH_TX; 4497 /* Wake up uCode load routine, now that load is complete */ 4498 il->ucode_write_complete = 1; 4499 wake_up(&il->wait_command_queue); 4500 } 4501 4502 if (inta & ~handled) { 4503 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled); 4504 il->isr_stats.unhandled++; 4505 } 4506 4507 if (inta & ~(il->inta_mask)) { 4508 IL_WARN("Disabled INTA bits 0x%08x were pending\n", 4509 inta & ~il->inta_mask); 4510 IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh); 4511 } 4512 4513 /* Re-enable all interrupts */ 4514 /* only Re-enable if disabled by irq */ 4515 if (test_bit(S_INT_ENABLED, &il->status)) 4516 il_enable_interrupts(il); 4517 /* Re-enable RF_KILL if it occurred */ 4518 else if (handled & CSR_INT_BIT_RF_KILL) 4519 il_enable_rfkill_int(il); 4520 4521 #ifdef CONFIG_IWLEGACY_DEBUG 4522 if (il_get_debug_level(il) & (IL_DL_ISR)) { 4523 inta = _il_rd(il, CSR_INT); 4524 inta_mask = _il_rd(il, CSR_INT_MASK); 4525 inta_fh = _il_rd(il, CSR_FH_INT_STATUS); 4526 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " 4527 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); 4528 } 4529 #endif 4530 } 4531 4532 /***************************************************************************** 4533 * 4534 * sysfs attributes 4535 * 4536 *****************************************************************************/ 4537 4538 #ifdef CONFIG_IWLEGACY_DEBUG 4539 4540 /* 4541 * The following adds a new attribute to the sysfs representation 4542 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/) 4543 * used for controlling the debug level. 4544 * 4545 * See the level definitions in iwl for details. 4546 * 4547 * The debug_level being managed using sysfs below is a per device debug 4548 * level that is used instead of the global debug level if it (the per 4549 * device debug level) is set. 4550 */ 4551 static ssize_t 4552 il4965_show_debug_level(struct device *d, struct device_attribute *attr, 4553 char *buf) 4554 { 4555 struct il_priv *il = dev_get_drvdata(d); 4556 return sprintf(buf, "0x%08X\n", il_get_debug_level(il)); 4557 } 4558 4559 static ssize_t 4560 il4965_store_debug_level(struct device *d, struct device_attribute *attr, 4561 const char *buf, size_t count) 4562 { 4563 struct il_priv *il = dev_get_drvdata(d); 4564 unsigned long val; 4565 int ret; 4566 4567 ret = kstrtoul(buf, 0, &val); 4568 if (ret) 4569 IL_ERR("%s is not in hex or decimal form.\n", buf); 4570 else 4571 il->debug_level = val; 4572 4573 return strnlen(buf, count); 4574 } 4575 4576 static DEVICE_ATTR(debug_level, 0644, il4965_show_debug_level, 4577 il4965_store_debug_level); 4578 4579 #endif /* CONFIG_IWLEGACY_DEBUG */ 4580 4581 static ssize_t 4582 il4965_show_temperature(struct device *d, struct device_attribute *attr, 4583 char *buf) 4584 { 4585 struct il_priv *il = dev_get_drvdata(d); 4586 4587 if (!il_is_alive(il)) 4588 return -EAGAIN; 4589 4590 return sprintf(buf, "%d\n", il->temperature); 4591 } 4592 4593 static DEVICE_ATTR(temperature, 0444, il4965_show_temperature, NULL); 4594 4595 static ssize_t 4596 il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf) 4597 { 4598 struct il_priv *il = dev_get_drvdata(d); 4599 4600 if (!il_is_ready_rf(il)) 4601 return sprintf(buf, "off\n"); 4602 else 4603 return sprintf(buf, "%d\n", il->tx_power_user_lmt); 4604 } 4605 4606 static ssize_t 4607 il4965_store_tx_power(struct device *d, struct device_attribute *attr, 4608 const char *buf, size_t count) 4609 { 4610 struct il_priv *il = dev_get_drvdata(d); 4611 unsigned long val; 4612 int ret; 4613 4614 ret = kstrtoul(buf, 10, &val); 4615 if (ret) 4616 IL_INFO("%s is not in decimal form.\n", buf); 4617 else { 4618 ret = il_set_tx_power(il, val, false); 4619 if (ret) 4620 IL_ERR("failed setting tx power (0x%08x).\n", ret); 4621 else 4622 ret = count; 4623 } 4624 return ret; 4625 } 4626 4627 static DEVICE_ATTR(tx_power, 0644, il4965_show_tx_power, 4628 il4965_store_tx_power); 4629 4630 static struct attribute *il_sysfs_entries[] = { 4631 &dev_attr_temperature.attr, 4632 &dev_attr_tx_power.attr, 4633 #ifdef CONFIG_IWLEGACY_DEBUG 4634 &dev_attr_debug_level.attr, 4635 #endif 4636 NULL 4637 }; 4638 4639 static const struct attribute_group il_attribute_group = { 4640 .name = NULL, /* put in device directory */ 4641 .attrs = il_sysfs_entries, 4642 }; 4643 4644 /****************************************************************************** 4645 * 4646 * uCode download functions 4647 * 4648 ******************************************************************************/ 4649 4650 static void 4651 il4965_dealloc_ucode_pci(struct il_priv *il) 4652 { 4653 il_free_fw_desc(il->pci_dev, &il->ucode_code); 4654 il_free_fw_desc(il->pci_dev, &il->ucode_data); 4655 il_free_fw_desc(il->pci_dev, &il->ucode_data_backup); 4656 il_free_fw_desc(il->pci_dev, &il->ucode_init); 4657 il_free_fw_desc(il->pci_dev, &il->ucode_init_data); 4658 il_free_fw_desc(il->pci_dev, &il->ucode_boot); 4659 } 4660 4661 static void 4662 il4965_nic_start(struct il_priv *il) 4663 { 4664 /* Remove all resets to allow NIC to operate */ 4665 _il_wr(il, CSR_RESET, 0); 4666 } 4667 4668 static void il4965_ucode_callback(const struct firmware *ucode_raw, 4669 void *context); 4670 static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length); 4671 4672 static int __must_check 4673 il4965_request_firmware(struct il_priv *il, bool first) 4674 { 4675 const char *name_pre = il->cfg->fw_name_pre; 4676 char tag[8]; 4677 4678 if (first) { 4679 il->fw_idx = il->cfg->ucode_api_max; 4680 sprintf(tag, "%d", il->fw_idx); 4681 } else { 4682 il->fw_idx--; 4683 sprintf(tag, "%d", il->fw_idx); 4684 } 4685 4686 if (il->fw_idx < il->cfg->ucode_api_min) { 4687 IL_ERR("no suitable firmware found!\n"); 4688 return -ENOENT; 4689 } 4690 4691 sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode"); 4692 4693 D_INFO("attempting to load firmware '%s'\n", il->firmware_name); 4694 4695 return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name, 4696 &il->pci_dev->dev, GFP_KERNEL, il, 4697 il4965_ucode_callback); 4698 } 4699 4700 struct il4965_firmware_pieces { 4701 const void *inst, *data, *init, *init_data, *boot; 4702 size_t inst_size, data_size, init_size, init_data_size, boot_size; 4703 }; 4704 4705 static int 4706 il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw, 4707 struct il4965_firmware_pieces *pieces) 4708 { 4709 struct il_ucode_header *ucode = (void *)ucode_raw->data; 4710 u32 api_ver, hdr_size; 4711 const u8 *src; 4712 4713 il->ucode_ver = le32_to_cpu(ucode->ver); 4714 api_ver = IL_UCODE_API(il->ucode_ver); 4715 4716 switch (api_ver) { 4717 default: 4718 case 0: 4719 case 1: 4720 case 2: 4721 hdr_size = 24; 4722 if (ucode_raw->size < hdr_size) { 4723 IL_ERR("File size too small!\n"); 4724 return -EINVAL; 4725 } 4726 pieces->inst_size = le32_to_cpu(ucode->v1.inst_size); 4727 pieces->data_size = le32_to_cpu(ucode->v1.data_size); 4728 pieces->init_size = le32_to_cpu(ucode->v1.init_size); 4729 pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size); 4730 pieces->boot_size = le32_to_cpu(ucode->v1.boot_size); 4731 src = ucode->v1.data; 4732 break; 4733 } 4734 4735 /* Verify size of file vs. image size info in file's header */ 4736 if (ucode_raw->size != 4737 hdr_size + pieces->inst_size + pieces->data_size + 4738 pieces->init_size + pieces->init_data_size + pieces->boot_size) { 4739 4740 IL_ERR("uCode file size %d does not match expected size\n", 4741 (int)ucode_raw->size); 4742 return -EINVAL; 4743 } 4744 4745 pieces->inst = src; 4746 src += pieces->inst_size; 4747 pieces->data = src; 4748 src += pieces->data_size; 4749 pieces->init = src; 4750 src += pieces->init_size; 4751 pieces->init_data = src; 4752 src += pieces->init_data_size; 4753 pieces->boot = src; 4754 src += pieces->boot_size; 4755 4756 return 0; 4757 } 4758 4759 /** 4760 * il4965_ucode_callback - callback when firmware was loaded 4761 * 4762 * If loaded successfully, copies the firmware into buffers 4763 * for the card to fetch (via DMA). 4764 */ 4765 static void 4766 il4965_ucode_callback(const struct firmware *ucode_raw, void *context) 4767 { 4768 struct il_priv *il = context; 4769 int err; 4770 struct il4965_firmware_pieces pieces; 4771 const unsigned int api_max = il->cfg->ucode_api_max; 4772 const unsigned int api_min = il->cfg->ucode_api_min; 4773 u32 api_ver; 4774 4775 u32 max_probe_length = 200; 4776 u32 standard_phy_calibration_size = 4777 IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE; 4778 4779 memset(&pieces, 0, sizeof(pieces)); 4780 4781 if (!ucode_raw) { 4782 if (il->fw_idx <= il->cfg->ucode_api_max) 4783 IL_ERR("request for firmware file '%s' failed.\n", 4784 il->firmware_name); 4785 goto try_again; 4786 } 4787 4788 D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name, 4789 ucode_raw->size); 4790 4791 /* Make sure that we got at least the API version number */ 4792 if (ucode_raw->size < 4) { 4793 IL_ERR("File size way too small!\n"); 4794 goto try_again; 4795 } 4796 4797 /* Data from ucode file: header followed by uCode images */ 4798 err = il4965_load_firmware(il, ucode_raw, &pieces); 4799 4800 if (err) 4801 goto try_again; 4802 4803 api_ver = IL_UCODE_API(il->ucode_ver); 4804 4805 /* 4806 * api_ver should match the api version forming part of the 4807 * firmware filename ... but we don't check for that and only rely 4808 * on the API version read from firmware header from here on forward 4809 */ 4810 if (api_ver < api_min || api_ver > api_max) { 4811 IL_ERR("Driver unable to support your firmware API. " 4812 "Driver supports v%u, firmware is v%u.\n", api_max, 4813 api_ver); 4814 goto try_again; 4815 } 4816 4817 if (api_ver != api_max) 4818 IL_ERR("Firmware has old API version. Expected v%u, " 4819 "got v%u. New firmware can be obtained " 4820 "from http://www.intellinuxwireless.org.\n", api_max, 4821 api_ver); 4822 4823 IL_INFO("loaded firmware version %u.%u.%u.%u\n", 4824 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver), 4825 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver)); 4826 4827 snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version), 4828 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver), 4829 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver), 4830 IL_UCODE_SERIAL(il->ucode_ver)); 4831 4832 /* 4833 * For any of the failures below (before allocating pci memory) 4834 * we will try to load a version with a smaller API -- maybe the 4835 * user just got a corrupted version of the latest API. 4836 */ 4837 4838 D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver); 4839 D_INFO("f/w package hdr runtime inst size = %zd\n", pieces.inst_size); 4840 D_INFO("f/w package hdr runtime data size = %zd\n", pieces.data_size); 4841 D_INFO("f/w package hdr init inst size = %zd\n", pieces.init_size); 4842 D_INFO("f/w package hdr init data size = %zd\n", pieces.init_data_size); 4843 D_INFO("f/w package hdr boot inst size = %zd\n", pieces.boot_size); 4844 4845 /* Verify that uCode images will fit in card's SRAM */ 4846 if (pieces.inst_size > il->hw_params.max_inst_size) { 4847 IL_ERR("uCode instr len %zd too large to fit in\n", 4848 pieces.inst_size); 4849 goto try_again; 4850 } 4851 4852 if (pieces.data_size > il->hw_params.max_data_size) { 4853 IL_ERR("uCode data len %zd too large to fit in\n", 4854 pieces.data_size); 4855 goto try_again; 4856 } 4857 4858 if (pieces.init_size > il->hw_params.max_inst_size) { 4859 IL_ERR("uCode init instr len %zd too large to fit in\n", 4860 pieces.init_size); 4861 goto try_again; 4862 } 4863 4864 if (pieces.init_data_size > il->hw_params.max_data_size) { 4865 IL_ERR("uCode init data len %zd too large to fit in\n", 4866 pieces.init_data_size); 4867 goto try_again; 4868 } 4869 4870 if (pieces.boot_size > il->hw_params.max_bsm_size) { 4871 IL_ERR("uCode boot instr len %zd too large to fit in\n", 4872 pieces.boot_size); 4873 goto try_again; 4874 } 4875 4876 /* Allocate ucode buffers for card's bus-master loading ... */ 4877 4878 /* Runtime instructions and 2 copies of data: 4879 * 1) unmodified from disk 4880 * 2) backup cache for save/restore during power-downs */ 4881 il->ucode_code.len = pieces.inst_size; 4882 il_alloc_fw_desc(il->pci_dev, &il->ucode_code); 4883 4884 il->ucode_data.len = pieces.data_size; 4885 il_alloc_fw_desc(il->pci_dev, &il->ucode_data); 4886 4887 il->ucode_data_backup.len = pieces.data_size; 4888 il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup); 4889 4890 if (!il->ucode_code.v_addr || !il->ucode_data.v_addr || 4891 !il->ucode_data_backup.v_addr) 4892 goto err_pci_alloc; 4893 4894 /* Initialization instructions and data */ 4895 if (pieces.init_size && pieces.init_data_size) { 4896 il->ucode_init.len = pieces.init_size; 4897 il_alloc_fw_desc(il->pci_dev, &il->ucode_init); 4898 4899 il->ucode_init_data.len = pieces.init_data_size; 4900 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data); 4901 4902 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr) 4903 goto err_pci_alloc; 4904 } 4905 4906 /* Bootstrap (instructions only, no data) */ 4907 if (pieces.boot_size) { 4908 il->ucode_boot.len = pieces.boot_size; 4909 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot); 4910 4911 if (!il->ucode_boot.v_addr) 4912 goto err_pci_alloc; 4913 } 4914 4915 /* Now that we can no longer fail, copy information */ 4916 4917 il->sta_key_max_num = STA_KEY_MAX_NUM; 4918 4919 /* Copy images into buffers for card's bus-master reads ... */ 4920 4921 /* Runtime instructions (first block of data in file) */ 4922 D_INFO("Copying (but not loading) uCode instr len %zd\n", 4923 pieces.inst_size); 4924 memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size); 4925 4926 D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", 4927 il->ucode_code.v_addr, (u32) il->ucode_code.p_addr); 4928 4929 /* 4930 * Runtime data 4931 * NOTE: Copy into backup buffer will be done in il_up() 4932 */ 4933 D_INFO("Copying (but not loading) uCode data len %zd\n", 4934 pieces.data_size); 4935 memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size); 4936 memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size); 4937 4938 /* Initialization instructions */ 4939 if (pieces.init_size) { 4940 D_INFO("Copying (but not loading) init instr len %zd\n", 4941 pieces.init_size); 4942 memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size); 4943 } 4944 4945 /* Initialization data */ 4946 if (pieces.init_data_size) { 4947 D_INFO("Copying (but not loading) init data len %zd\n", 4948 pieces.init_data_size); 4949 memcpy(il->ucode_init_data.v_addr, pieces.init_data, 4950 pieces.init_data_size); 4951 } 4952 4953 /* Bootstrap instructions */ 4954 D_INFO("Copying (but not loading) boot instr len %zd\n", 4955 pieces.boot_size); 4956 memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size); 4957 4958 /* 4959 * figure out the offset of chain noise reset and gain commands 4960 * base on the size of standard phy calibration commands table size 4961 */ 4962 il->_4965.phy_calib_chain_noise_reset_cmd = 4963 standard_phy_calibration_size; 4964 il->_4965.phy_calib_chain_noise_gain_cmd = 4965 standard_phy_calibration_size + 1; 4966 4967 /************************************************** 4968 * This is still part of probe() in a sense... 4969 * 4970 * 9. Setup and register with mac80211 and debugfs 4971 **************************************************/ 4972 err = il4965_mac_setup_register(il, max_probe_length); 4973 if (err) 4974 goto out_unbind; 4975 4976 il_dbgfs_register(il, DRV_NAME); 4977 4978 err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group); 4979 if (err) { 4980 IL_ERR("failed to create sysfs device attributes\n"); 4981 goto out_unbind; 4982 } 4983 4984 /* We have our copies now, allow OS release its copies */ 4985 release_firmware(ucode_raw); 4986 complete(&il->_4965.firmware_loading_complete); 4987 return; 4988 4989 try_again: 4990 /* try next, if any */ 4991 if (il4965_request_firmware(il, false)) 4992 goto out_unbind; 4993 release_firmware(ucode_raw); 4994 return; 4995 4996 err_pci_alloc: 4997 IL_ERR("failed to allocate pci memory\n"); 4998 il4965_dealloc_ucode_pci(il); 4999 out_unbind: 5000 complete(&il->_4965.firmware_loading_complete); 5001 device_release_driver(&il->pci_dev->dev); 5002 release_firmware(ucode_raw); 5003 } 5004 5005 static const char *const desc_lookup_text[] = { 5006 "OK", 5007 "FAIL", 5008 "BAD_PARAM", 5009 "BAD_CHECKSUM", 5010 "NMI_INTERRUPT_WDG", 5011 "SYSASSERT", 5012 "FATAL_ERROR", 5013 "BAD_COMMAND", 5014 "HW_ERROR_TUNE_LOCK", 5015 "HW_ERROR_TEMPERATURE", 5016 "ILLEGAL_CHAN_FREQ", 5017 "VCC_NOT_STBL", 5018 "FH49_ERROR", 5019 "NMI_INTERRUPT_HOST", 5020 "NMI_INTERRUPT_ACTION_PT", 5021 "NMI_INTERRUPT_UNKNOWN", 5022 "UCODE_VERSION_MISMATCH", 5023 "HW_ERROR_ABS_LOCK", 5024 "HW_ERROR_CAL_LOCK_FAIL", 5025 "NMI_INTERRUPT_INST_ACTION_PT", 5026 "NMI_INTERRUPT_DATA_ACTION_PT", 5027 "NMI_TRM_HW_ER", 5028 "NMI_INTERRUPT_TRM", 5029 "NMI_INTERRUPT_BREAK_POINT", 5030 "DEBUG_0", 5031 "DEBUG_1", 5032 "DEBUG_2", 5033 "DEBUG_3", 5034 }; 5035 5036 static struct { 5037 char *name; 5038 u8 num; 5039 } advanced_lookup[] = { 5040 { 5041 "NMI_INTERRUPT_WDG", 0x34}, { 5042 "SYSASSERT", 0x35}, { 5043 "UCODE_VERSION_MISMATCH", 0x37}, { 5044 "BAD_COMMAND", 0x38}, { 5045 "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, { 5046 "FATAL_ERROR", 0x3D}, { 5047 "NMI_TRM_HW_ERR", 0x46}, { 5048 "NMI_INTERRUPT_TRM", 0x4C}, { 5049 "NMI_INTERRUPT_BREAK_POINT", 0x54}, { 5050 "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, { 5051 "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, { 5052 "NMI_INTERRUPT_HOST", 0x66}, { 5053 "NMI_INTERRUPT_ACTION_PT", 0x7C}, { 5054 "NMI_INTERRUPT_UNKNOWN", 0x84}, { 5055 "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, { 5056 "ADVANCED_SYSASSERT", 0},}; 5057 5058 static const char * 5059 il4965_desc_lookup(u32 num) 5060 { 5061 int i; 5062 int max = ARRAY_SIZE(desc_lookup_text); 5063 5064 if (num < max) 5065 return desc_lookup_text[num]; 5066 5067 max = ARRAY_SIZE(advanced_lookup) - 1; 5068 for (i = 0; i < max; i++) { 5069 if (advanced_lookup[i].num == num) 5070 break; 5071 } 5072 return advanced_lookup[i].name; 5073 } 5074 5075 #define ERROR_START_OFFSET (1 * sizeof(u32)) 5076 #define ERROR_ELEM_SIZE (7 * sizeof(u32)) 5077 5078 void 5079 il4965_dump_nic_error_log(struct il_priv *il) 5080 { 5081 u32 data2, line; 5082 u32 desc, time, count, base, data1; 5083 u32 blink1, blink2, ilink1, ilink2; 5084 u32 pc, hcmd; 5085 5086 if (il->ucode_type == UCODE_INIT) 5087 base = le32_to_cpu(il->card_alive_init.error_event_table_ptr); 5088 else 5089 base = le32_to_cpu(il->card_alive.error_event_table_ptr); 5090 5091 if (!il->ops->is_valid_rtc_data_addr(base)) { 5092 IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n", 5093 base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT"); 5094 return; 5095 } 5096 5097 count = il_read_targ_mem(il, base); 5098 5099 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { 5100 IL_ERR("Start IWL Error Log Dump:\n"); 5101 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count); 5102 } 5103 5104 desc = il_read_targ_mem(il, base + 1 * sizeof(u32)); 5105 il->isr_stats.err_code = desc; 5106 pc = il_read_targ_mem(il, base + 2 * sizeof(u32)); 5107 blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32)); 5108 blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32)); 5109 ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32)); 5110 ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32)); 5111 data1 = il_read_targ_mem(il, base + 7 * sizeof(u32)); 5112 data2 = il_read_targ_mem(il, base + 8 * sizeof(u32)); 5113 line = il_read_targ_mem(il, base + 9 * sizeof(u32)); 5114 time = il_read_targ_mem(il, base + 11 * sizeof(u32)); 5115 hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32)); 5116 5117 IL_ERR("Desc Time " 5118 "data1 data2 line\n"); 5119 IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n", 5120 il4965_desc_lookup(desc), desc, time, data1, data2, line); 5121 IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n"); 5122 IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1, 5123 blink2, ilink1, ilink2, hcmd); 5124 } 5125 5126 static void 5127 il4965_rf_kill_ct_config(struct il_priv *il) 5128 { 5129 struct il_ct_kill_config cmd; 5130 unsigned long flags; 5131 int ret = 0; 5132 5133 spin_lock_irqsave(&il->lock, flags); 5134 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, 5135 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); 5136 spin_unlock_irqrestore(&il->lock, flags); 5137 5138 cmd.critical_temperature_R = 5139 cpu_to_le32(il->hw_params.ct_kill_threshold); 5140 5141 ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd); 5142 if (ret) 5143 IL_ERR("C_CT_KILL_CONFIG failed\n"); 5144 else 5145 D_INFO("C_CT_KILL_CONFIG " "succeeded, " 5146 "critical temperature is %d\n", 5147 il->hw_params.ct_kill_threshold); 5148 } 5149 5150 static const s8 default_queue_to_tx_fifo[] = { 5151 IL_TX_FIFO_VO, 5152 IL_TX_FIFO_VI, 5153 IL_TX_FIFO_BE, 5154 IL_TX_FIFO_BK, 5155 IL49_CMD_FIFO_NUM, 5156 IL_TX_FIFO_UNUSED, 5157 IL_TX_FIFO_UNUSED, 5158 }; 5159 5160 #define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) 5161 5162 static int 5163 il4965_alive_notify(struct il_priv *il) 5164 { 5165 u32 a; 5166 unsigned long flags; 5167 int i, chan; 5168 u32 reg_val; 5169 5170 spin_lock_irqsave(&il->lock, flags); 5171 5172 /* Clear 4965's internal Tx Scheduler data base */ 5173 il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR); 5174 a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET; 5175 for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4) 5176 il_write_targ_mem(il, a, 0); 5177 for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4) 5178 il_write_targ_mem(il, a, 0); 5179 for (; 5180 a < 5181 il->scd_base_addr + 5182 IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num); 5183 a += 4) 5184 il_write_targ_mem(il, a, 0); 5185 5186 /* Tel 4965 where to find Tx byte count tables */ 5187 il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10); 5188 5189 /* Enable DMA channel */ 5190 for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++) 5191 il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan), 5192 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | 5193 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); 5194 5195 /* Update FH chicken bits */ 5196 reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG); 5197 il_wr(il, FH49_TX_CHICKEN_BITS_REG, 5198 reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); 5199 5200 /* Disable chain mode for all queues */ 5201 il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0); 5202 5203 /* Initialize each Tx queue (including the command queue) */ 5204 for (i = 0; i < il->hw_params.max_txq_num; i++) { 5205 5206 /* TFD circular buffer read/write idxes */ 5207 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0); 5208 il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8)); 5209 5210 /* Max Tx Window size for Scheduler-ACK mode */ 5211 il_write_targ_mem(il, 5212 il->scd_base_addr + 5213 IL49_SCD_CONTEXT_QUEUE_OFFSET(i), 5214 (SCD_WIN_SIZE << 5215 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & 5216 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); 5217 5218 /* Frame limit */ 5219 il_write_targ_mem(il, 5220 il->scd_base_addr + 5221 IL49_SCD_CONTEXT_QUEUE_OFFSET(i) + 5222 sizeof(u32), 5223 (SCD_FRAME_LIMIT << 5224 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & 5225 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); 5226 5227 } 5228 il_wr_prph(il, IL49_SCD_INTERRUPT_MASK, 5229 (1 << il->hw_params.max_txq_num) - 1); 5230 5231 /* Activate all Tx DMA/FIFO channels */ 5232 il4965_txq_set_sched(il, IL_MASK(0, 6)); 5233 5234 il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0); 5235 5236 /* make sure all queue are not stopped */ 5237 memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped)); 5238 for (i = 0; i < 4; i++) 5239 atomic_set(&il->queue_stop_count[i], 0); 5240 5241 /* reset to 0 to enable all the queue first */ 5242 il->txq_ctx_active_msk = 0; 5243 /* Map each Tx/cmd queue to its corresponding fifo */ 5244 BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7); 5245 5246 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) { 5247 int ac = default_queue_to_tx_fifo[i]; 5248 5249 il_txq_ctx_activate(il, i); 5250 5251 if (ac == IL_TX_FIFO_UNUSED) 5252 continue; 5253 5254 il4965_tx_queue_set_status(il, &il->txq[i], ac, 0); 5255 } 5256 5257 spin_unlock_irqrestore(&il->lock, flags); 5258 5259 return 0; 5260 } 5261 5262 /** 5263 * il4965_alive_start - called after N_ALIVE notification received 5264 * from protocol/runtime uCode (initialization uCode's 5265 * Alive gets handled by il_init_alive_start()). 5266 */ 5267 static void 5268 il4965_alive_start(struct il_priv *il) 5269 { 5270 int ret = 0; 5271 5272 D_INFO("Runtime Alive received.\n"); 5273 5274 if (il->card_alive.is_valid != UCODE_VALID_OK) { 5275 /* We had an error bringing up the hardware, so take it 5276 * all the way back down so we can try again */ 5277 D_INFO("Alive failed.\n"); 5278 goto restart; 5279 } 5280 5281 /* Initialize uCode has loaded Runtime uCode ... verify inst image. 5282 * This is a paranoid check, because we would not have gotten the 5283 * "runtime" alive if code weren't properly loaded. */ 5284 if (il4965_verify_ucode(il)) { 5285 /* Runtime instruction load was bad; 5286 * take it all the way back down so we can try again */ 5287 D_INFO("Bad runtime uCode load.\n"); 5288 goto restart; 5289 } 5290 5291 ret = il4965_alive_notify(il); 5292 if (ret) { 5293 IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret); 5294 goto restart; 5295 } 5296 5297 /* After the ALIVE response, we can send host commands to the uCode */ 5298 set_bit(S_ALIVE, &il->status); 5299 5300 /* Enable watchdog to monitor the driver tx queues */ 5301 il_setup_watchdog(il); 5302 5303 if (il_is_rfkill(il)) 5304 return; 5305 5306 ieee80211_wake_queues(il->hw); 5307 5308 il->active_rate = RATES_MASK; 5309 5310 il_power_update_mode(il, true); 5311 D_INFO("Updated power mode\n"); 5312 5313 if (il_is_associated(il)) { 5314 struct il_rxon_cmd *active_rxon = 5315 (struct il_rxon_cmd *)&il->active; 5316 /* apply any changes in staging */ 5317 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; 5318 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; 5319 } else { 5320 /* Initialize our rx_config data */ 5321 il_connection_init_rx_config(il); 5322 5323 if (il->ops->set_rxon_chain) 5324 il->ops->set_rxon_chain(il); 5325 } 5326 5327 /* Configure bluetooth coexistence if enabled */ 5328 il_send_bt_config(il); 5329 5330 il4965_reset_run_time_calib(il); 5331 5332 set_bit(S_READY, &il->status); 5333 5334 /* Configure the adapter for unassociated operation */ 5335 il_commit_rxon(il); 5336 5337 /* At this point, the NIC is initialized and operational */ 5338 il4965_rf_kill_ct_config(il); 5339 5340 D_INFO("ALIVE processing complete.\n"); 5341 wake_up(&il->wait_command_queue); 5342 5343 return; 5344 5345 restart: 5346 queue_work(il->workqueue, &il->restart); 5347 } 5348 5349 static void il4965_cancel_deferred_work(struct il_priv *il); 5350 5351 static void 5352 __il4965_down(struct il_priv *il) 5353 { 5354 unsigned long flags; 5355 int exit_pending; 5356 5357 D_INFO(DRV_NAME " is going down\n"); 5358 5359 il_scan_cancel_timeout(il, 200); 5360 5361 exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status); 5362 5363 /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set 5364 * to prevent rearm timer */ 5365 del_timer_sync(&il->watchdog); 5366 5367 il_clear_ucode_stations(il); 5368 5369 /* FIXME: race conditions ? */ 5370 spin_lock_irq(&il->sta_lock); 5371 /* 5372 * Remove all key information that is not stored as part 5373 * of station information since mac80211 may not have had 5374 * a chance to remove all the keys. When device is 5375 * reconfigured by mac80211 after an error all keys will 5376 * be reconfigured. 5377 */ 5378 memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys)); 5379 il->_4965.key_mapping_keys = 0; 5380 spin_unlock_irq(&il->sta_lock); 5381 5382 il_dealloc_bcast_stations(il); 5383 il_clear_driver_stations(il); 5384 5385 /* Unblock any waiting calls */ 5386 wake_up_all(&il->wait_command_queue); 5387 5388 /* Wipe out the EXIT_PENDING status bit if we are not actually 5389 * exiting the module */ 5390 if (!exit_pending) 5391 clear_bit(S_EXIT_PENDING, &il->status); 5392 5393 /* stop and reset the on-board processor */ 5394 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); 5395 5396 /* tell the device to stop sending interrupts */ 5397 spin_lock_irqsave(&il->lock, flags); 5398 il_disable_interrupts(il); 5399 spin_unlock_irqrestore(&il->lock, flags); 5400 il4965_synchronize_irq(il); 5401 5402 if (il->mac80211_registered) 5403 ieee80211_stop_queues(il->hw); 5404 5405 /* If we have not previously called il_init() then 5406 * clear all bits but the RF Kill bit and return */ 5407 if (!il_is_init(il)) { 5408 il->status = 5409 test_bit(S_RFKILL, &il->status) << S_RFKILL | 5410 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | 5411 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; 5412 goto exit; 5413 } 5414 5415 /* ...otherwise clear out all the status bits but the RF Kill 5416 * bit and continue taking the NIC down. */ 5417 il->status &= 5418 test_bit(S_RFKILL, &il->status) << S_RFKILL | 5419 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | 5420 test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR | 5421 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; 5422 5423 /* 5424 * We disabled and synchronized interrupt, and priv->mutex is taken, so 5425 * here is the only thread which will program device registers, but 5426 * still have lockdep assertions, so we are taking reg_lock. 5427 */ 5428 spin_lock_irq(&il->reg_lock); 5429 /* FIXME: il_grab_nic_access if rfkill is off ? */ 5430 5431 il4965_txq_ctx_stop(il); 5432 il4965_rxq_stop(il); 5433 /* Power-down device's busmaster DMA clocks */ 5434 _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); 5435 udelay(5); 5436 /* Make sure (redundant) we've released our request to stay awake */ 5437 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 5438 /* Stop the device, and put it in low power state */ 5439 _il_apm_stop(il); 5440 5441 spin_unlock_irq(&il->reg_lock); 5442 5443 il4965_txq_ctx_unmap(il); 5444 exit: 5445 memset(&il->card_alive, 0, sizeof(struct il_alive_resp)); 5446 5447 dev_kfree_skb(il->beacon_skb); 5448 il->beacon_skb = NULL; 5449 5450 /* clear out any free frames */ 5451 il4965_clear_free_frames(il); 5452 } 5453 5454 static void 5455 il4965_down(struct il_priv *il) 5456 { 5457 mutex_lock(&il->mutex); 5458 __il4965_down(il); 5459 mutex_unlock(&il->mutex); 5460 5461 il4965_cancel_deferred_work(il); 5462 } 5463 5464 5465 static void 5466 il4965_set_hw_ready(struct il_priv *il) 5467 { 5468 int ret; 5469 5470 il_set_bit(il, CSR_HW_IF_CONFIG_REG, 5471 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); 5472 5473 /* See if we got it */ 5474 ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, 5475 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 5476 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 5477 100); 5478 if (ret >= 0) 5479 il->hw_ready = true; 5480 5481 D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not"); 5482 } 5483 5484 static void 5485 il4965_prepare_card_hw(struct il_priv *il) 5486 { 5487 int ret; 5488 5489 il->hw_ready = false; 5490 5491 il4965_set_hw_ready(il); 5492 if (il->hw_ready) 5493 return; 5494 5495 /* If HW is not ready, prepare the conditions to check again */ 5496 il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE); 5497 5498 ret = 5499 _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, 5500 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 5501 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000); 5502 5503 /* HW should be ready by now, check again. */ 5504 if (ret != -ETIMEDOUT) 5505 il4965_set_hw_ready(il); 5506 } 5507 5508 #define MAX_HW_RESTARTS 5 5509 5510 static int 5511 __il4965_up(struct il_priv *il) 5512 { 5513 int i; 5514 int ret; 5515 5516 if (test_bit(S_EXIT_PENDING, &il->status)) { 5517 IL_WARN("Exit pending; will not bring the NIC up\n"); 5518 return -EIO; 5519 } 5520 5521 if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) { 5522 IL_ERR("ucode not available for device bringup\n"); 5523 return -EIO; 5524 } 5525 5526 ret = il4965_alloc_bcast_station(il); 5527 if (ret) { 5528 il_dealloc_bcast_stations(il); 5529 return ret; 5530 } 5531 5532 il4965_prepare_card_hw(il); 5533 if (!il->hw_ready) { 5534 il_dealloc_bcast_stations(il); 5535 IL_ERR("HW not ready\n"); 5536 return -EIO; 5537 } 5538 5539 /* If platform's RF_KILL switch is NOT set to KILL */ 5540 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) 5541 clear_bit(S_RFKILL, &il->status); 5542 else { 5543 set_bit(S_RFKILL, &il->status); 5544 wiphy_rfkill_set_hw_state(il->hw->wiphy, true); 5545 5546 il_dealloc_bcast_stations(il); 5547 il_enable_rfkill_int(il); 5548 IL_WARN("Radio disabled by HW RF Kill switch\n"); 5549 return 0; 5550 } 5551 5552 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5553 5554 /* must be initialised before il_hw_nic_init */ 5555 il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM; 5556 5557 ret = il4965_hw_nic_init(il); 5558 if (ret) { 5559 IL_ERR("Unable to init nic\n"); 5560 il_dealloc_bcast_stations(il); 5561 return ret; 5562 } 5563 5564 /* make sure rfkill handshake bits are cleared */ 5565 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5566 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 5567 5568 /* clear (again), then enable host interrupts */ 5569 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5570 il_enable_interrupts(il); 5571 5572 /* really make sure rfkill handshake bits are cleared */ 5573 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5574 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5575 5576 /* Copy original ucode data image from disk into backup cache. 5577 * This will be used to initialize the on-board processor's 5578 * data SRAM for a clean start when the runtime program first loads. */ 5579 memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr, 5580 il->ucode_data.len); 5581 5582 for (i = 0; i < MAX_HW_RESTARTS; i++) { 5583 5584 /* load bootstrap state machine, 5585 * load bootstrap program into processor's memory, 5586 * prepare to load the "initialize" uCode */ 5587 ret = il->ops->load_ucode(il); 5588 5589 if (ret) { 5590 IL_ERR("Unable to set up bootstrap uCode: %d\n", ret); 5591 continue; 5592 } 5593 5594 /* start card; "initialize" will load runtime ucode */ 5595 il4965_nic_start(il); 5596 5597 D_INFO(DRV_NAME " is coming up\n"); 5598 5599 return 0; 5600 } 5601 5602 set_bit(S_EXIT_PENDING, &il->status); 5603 __il4965_down(il); 5604 clear_bit(S_EXIT_PENDING, &il->status); 5605 5606 /* tried to restart and config the device for as long as our 5607 * patience could withstand */ 5608 IL_ERR("Unable to initialize device after %d attempts.\n", i); 5609 return -EIO; 5610 } 5611 5612 /***************************************************************************** 5613 * 5614 * Workqueue callbacks 5615 * 5616 *****************************************************************************/ 5617 5618 static void 5619 il4965_bg_init_alive_start(struct work_struct *data) 5620 { 5621 struct il_priv *il = 5622 container_of(data, struct il_priv, init_alive_start.work); 5623 5624 mutex_lock(&il->mutex); 5625 if (test_bit(S_EXIT_PENDING, &il->status)) 5626 goto out; 5627 5628 il->ops->init_alive_start(il); 5629 out: 5630 mutex_unlock(&il->mutex); 5631 } 5632 5633 static void 5634 il4965_bg_alive_start(struct work_struct *data) 5635 { 5636 struct il_priv *il = 5637 container_of(data, struct il_priv, alive_start.work); 5638 5639 mutex_lock(&il->mutex); 5640 if (test_bit(S_EXIT_PENDING, &il->status)) 5641 goto out; 5642 5643 il4965_alive_start(il); 5644 out: 5645 mutex_unlock(&il->mutex); 5646 } 5647 5648 static void 5649 il4965_bg_run_time_calib_work(struct work_struct *work) 5650 { 5651 struct il_priv *il = container_of(work, struct il_priv, 5652 run_time_calib_work); 5653 5654 mutex_lock(&il->mutex); 5655 5656 if (test_bit(S_EXIT_PENDING, &il->status) || 5657 test_bit(S_SCANNING, &il->status)) { 5658 mutex_unlock(&il->mutex); 5659 return; 5660 } 5661 5662 if (il->start_calib) { 5663 il4965_chain_noise_calibration(il, (void *)&il->_4965.stats); 5664 il4965_sensitivity_calibration(il, (void *)&il->_4965.stats); 5665 } 5666 5667 mutex_unlock(&il->mutex); 5668 } 5669 5670 static void 5671 il4965_bg_restart(struct work_struct *data) 5672 { 5673 struct il_priv *il = container_of(data, struct il_priv, restart); 5674 5675 if (test_bit(S_EXIT_PENDING, &il->status)) 5676 return; 5677 5678 if (test_and_clear_bit(S_FW_ERROR, &il->status)) { 5679 mutex_lock(&il->mutex); 5680 il->is_open = 0; 5681 5682 __il4965_down(il); 5683 5684 mutex_unlock(&il->mutex); 5685 il4965_cancel_deferred_work(il); 5686 ieee80211_restart_hw(il->hw); 5687 } else { 5688 il4965_down(il); 5689 5690 mutex_lock(&il->mutex); 5691 if (test_bit(S_EXIT_PENDING, &il->status)) { 5692 mutex_unlock(&il->mutex); 5693 return; 5694 } 5695 5696 __il4965_up(il); 5697 mutex_unlock(&il->mutex); 5698 } 5699 } 5700 5701 static void 5702 il4965_bg_rx_replenish(struct work_struct *data) 5703 { 5704 struct il_priv *il = container_of(data, struct il_priv, rx_replenish); 5705 5706 if (test_bit(S_EXIT_PENDING, &il->status)) 5707 return; 5708 5709 mutex_lock(&il->mutex); 5710 il4965_rx_replenish(il); 5711 mutex_unlock(&il->mutex); 5712 } 5713 5714 /***************************************************************************** 5715 * 5716 * mac80211 entry point functions 5717 * 5718 *****************************************************************************/ 5719 5720 #define UCODE_READY_TIMEOUT (4 * HZ) 5721 5722 /* 5723 * Not a mac80211 entry point function, but it fits in with all the 5724 * other mac80211 functions grouped here. 5725 */ 5726 static int 5727 il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length) 5728 { 5729 int ret; 5730 struct ieee80211_hw *hw = il->hw; 5731 5732 hw->rate_control_algorithm = "iwl-4965-rs"; 5733 5734 /* Tell mac80211 our characteristics */ 5735 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 5736 ieee80211_hw_set(hw, SUPPORTS_PS); 5737 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 5738 ieee80211_hw_set(hw, SPECTRUM_MGMT); 5739 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 5740 ieee80211_hw_set(hw, SIGNAL_DBM); 5741 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 5742 if (il->cfg->sku & IL_SKU_N) 5743 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 5744 NL80211_FEATURE_STATIC_SMPS; 5745 5746 hw->sta_data_size = sizeof(struct il_station_priv); 5747 hw->vif_data_size = sizeof(struct il_vif_priv); 5748 5749 hw->wiphy->interface_modes = 5750 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); 5751 5752 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 5753 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 5754 REGULATORY_DISABLE_BEACON_HINTS; 5755 5756 /* 5757 * For now, disable PS by default because it affects 5758 * RX performance significantly. 5759 */ 5760 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 5761 5762 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 5763 /* we create the 802.11 header and a zero-length SSID element */ 5764 hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2; 5765 5766 /* Default value; 4 EDCA QOS priorities */ 5767 hw->queues = 4; 5768 5769 hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL; 5770 5771 if (il->bands[NL80211_BAND_2GHZ].n_channels) 5772 il->hw->wiphy->bands[NL80211_BAND_2GHZ] = 5773 &il->bands[NL80211_BAND_2GHZ]; 5774 if (il->bands[NL80211_BAND_5GHZ].n_channels) 5775 il->hw->wiphy->bands[NL80211_BAND_5GHZ] = 5776 &il->bands[NL80211_BAND_5GHZ]; 5777 5778 il_leds_init(il); 5779 5780 wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 5781 5782 ret = ieee80211_register_hw(il->hw); 5783 if (ret) { 5784 IL_ERR("Failed to register hw (error %d)\n", ret); 5785 return ret; 5786 } 5787 il->mac80211_registered = 1; 5788 5789 return 0; 5790 } 5791 5792 int 5793 il4965_mac_start(struct ieee80211_hw *hw) 5794 { 5795 struct il_priv *il = hw->priv; 5796 int ret; 5797 5798 D_MAC80211("enter\n"); 5799 5800 /* we should be verifying the device is ready to be opened */ 5801 mutex_lock(&il->mutex); 5802 ret = __il4965_up(il); 5803 mutex_unlock(&il->mutex); 5804 5805 if (ret) 5806 return ret; 5807 5808 if (il_is_rfkill(il)) 5809 goto out; 5810 5811 D_INFO("Start UP work done.\n"); 5812 5813 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from 5814 * mac80211 will not be run successfully. */ 5815 ret = wait_event_timeout(il->wait_command_queue, 5816 test_bit(S_READY, &il->status), 5817 UCODE_READY_TIMEOUT); 5818 if (!ret) { 5819 if (!test_bit(S_READY, &il->status)) { 5820 IL_ERR("START_ALIVE timeout after %dms.\n", 5821 jiffies_to_msecs(UCODE_READY_TIMEOUT)); 5822 return -ETIMEDOUT; 5823 } 5824 } 5825 5826 il4965_led_enable(il); 5827 5828 out: 5829 il->is_open = 1; 5830 D_MAC80211("leave\n"); 5831 return 0; 5832 } 5833 5834 void 5835 il4965_mac_stop(struct ieee80211_hw *hw) 5836 { 5837 struct il_priv *il = hw->priv; 5838 5839 D_MAC80211("enter\n"); 5840 5841 if (!il->is_open) 5842 return; 5843 5844 il->is_open = 0; 5845 5846 il4965_down(il); 5847 5848 flush_workqueue(il->workqueue); 5849 5850 /* User space software may expect getting rfkill changes 5851 * even if interface is down */ 5852 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5853 il_enable_rfkill_int(il); 5854 5855 D_MAC80211("leave\n"); 5856 } 5857 5858 void 5859 il4965_mac_tx(struct ieee80211_hw *hw, 5860 struct ieee80211_tx_control *control, 5861 struct sk_buff *skb) 5862 { 5863 struct il_priv *il = hw->priv; 5864 5865 D_MACDUMP("enter\n"); 5866 5867 D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, 5868 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); 5869 5870 if (il4965_tx_skb(il, control->sta, skb)) 5871 dev_kfree_skb_any(skb); 5872 5873 D_MACDUMP("leave\n"); 5874 } 5875 5876 void 5877 il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 5878 struct ieee80211_key_conf *keyconf, 5879 struct ieee80211_sta *sta, u32 iv32, u16 * phase1key) 5880 { 5881 struct il_priv *il = hw->priv; 5882 5883 D_MAC80211("enter\n"); 5884 5885 il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key); 5886 5887 D_MAC80211("leave\n"); 5888 } 5889 5890 int 5891 il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 5892 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 5893 struct ieee80211_key_conf *key) 5894 { 5895 struct il_priv *il = hw->priv; 5896 int ret; 5897 u8 sta_id; 5898 bool is_default_wep_key = false; 5899 5900 D_MAC80211("enter\n"); 5901 5902 if (il->cfg->mod_params->sw_crypto) { 5903 D_MAC80211("leave - hwcrypto disabled\n"); 5904 return -EOPNOTSUPP; 5905 } 5906 5907 /* 5908 * To support IBSS RSN, don't program group keys in IBSS, the 5909 * hardware will then not attempt to decrypt the frames. 5910 */ 5911 if (vif->type == NL80211_IFTYPE_ADHOC && 5912 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 5913 D_MAC80211("leave - ad-hoc group key\n"); 5914 return -EOPNOTSUPP; 5915 } 5916 5917 sta_id = il_sta_id_or_broadcast(il, sta); 5918 if (sta_id == IL_INVALID_STATION) 5919 return -EINVAL; 5920 5921 mutex_lock(&il->mutex); 5922 il_scan_cancel_timeout(il, 100); 5923 5924 /* 5925 * If we are getting WEP group key and we didn't receive any key mapping 5926 * so far, we are in legacy wep mode (group key only), otherwise we are 5927 * in 1X mode. 5928 * In legacy wep mode, we use another host command to the uCode. 5929 */ 5930 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 5931 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 5932 if (cmd == SET_KEY) 5933 is_default_wep_key = !il->_4965.key_mapping_keys; 5934 else 5935 is_default_wep_key = 5936 (key->hw_key_idx == HW_KEY_DEFAULT); 5937 } 5938 5939 switch (cmd) { 5940 case SET_KEY: 5941 if (is_default_wep_key) 5942 ret = il4965_set_default_wep_key(il, key); 5943 else 5944 ret = il4965_set_dynamic_key(il, key, sta_id); 5945 5946 D_MAC80211("enable hwcrypto key\n"); 5947 break; 5948 case DISABLE_KEY: 5949 if (is_default_wep_key) 5950 ret = il4965_remove_default_wep_key(il, key); 5951 else 5952 ret = il4965_remove_dynamic_key(il, key, sta_id); 5953 5954 D_MAC80211("disable hwcrypto key\n"); 5955 break; 5956 default: 5957 ret = -EINVAL; 5958 } 5959 5960 mutex_unlock(&il->mutex); 5961 D_MAC80211("leave\n"); 5962 5963 return ret; 5964 } 5965 5966 int 5967 il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 5968 struct ieee80211_ampdu_params *params) 5969 { 5970 struct il_priv *il = hw->priv; 5971 int ret = -EINVAL; 5972 struct ieee80211_sta *sta = params->sta; 5973 enum ieee80211_ampdu_mlme_action action = params->action; 5974 u16 tid = params->tid; 5975 u16 *ssn = ¶ms->ssn; 5976 5977 D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid); 5978 5979 if (!(il->cfg->sku & IL_SKU_N)) 5980 return -EACCES; 5981 5982 mutex_lock(&il->mutex); 5983 5984 switch (action) { 5985 case IEEE80211_AMPDU_RX_START: 5986 D_HT("start Rx\n"); 5987 ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn); 5988 break; 5989 case IEEE80211_AMPDU_RX_STOP: 5990 D_HT("stop Rx\n"); 5991 ret = il4965_sta_rx_agg_stop(il, sta, tid); 5992 if (test_bit(S_EXIT_PENDING, &il->status)) 5993 ret = 0; 5994 break; 5995 case IEEE80211_AMPDU_TX_START: 5996 D_HT("start Tx\n"); 5997 ret = il4965_tx_agg_start(il, vif, sta, tid, ssn); 5998 break; 5999 case IEEE80211_AMPDU_TX_STOP_CONT: 6000 case IEEE80211_AMPDU_TX_STOP_FLUSH: 6001 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 6002 D_HT("stop Tx\n"); 6003 ret = il4965_tx_agg_stop(il, vif, sta, tid); 6004 if (test_bit(S_EXIT_PENDING, &il->status)) 6005 ret = 0; 6006 break; 6007 case IEEE80211_AMPDU_TX_OPERATIONAL: 6008 ret = 0; 6009 break; 6010 } 6011 mutex_unlock(&il->mutex); 6012 6013 return ret; 6014 } 6015 6016 int 6017 il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 6018 struct ieee80211_sta *sta) 6019 { 6020 struct il_priv *il = hw->priv; 6021 struct il_station_priv *sta_priv = (void *)sta->drv_priv; 6022 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 6023 int ret; 6024 u8 sta_id; 6025 6026 D_INFO("received request to add station %pM\n", sta->addr); 6027 mutex_lock(&il->mutex); 6028 D_INFO("proceeding to add station %pM\n", sta->addr); 6029 sta_priv->common.sta_id = IL_INVALID_STATION; 6030 6031 atomic_set(&sta_priv->pending_frames, 0); 6032 6033 ret = 6034 il_add_station_common(il, sta->addr, is_ap, sta, &sta_id); 6035 if (ret) { 6036 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret); 6037 /* Should we return success if return code is EEXIST ? */ 6038 mutex_unlock(&il->mutex); 6039 return ret; 6040 } 6041 6042 sta_priv->common.sta_id = sta_id; 6043 6044 /* Initialize rate scaling */ 6045 D_INFO("Initializing rate scaling for station %pM\n", sta->addr); 6046 il4965_rs_rate_init(il, sta, sta_id); 6047 mutex_unlock(&il->mutex); 6048 6049 return 0; 6050 } 6051 6052 void 6053 il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 6054 struct ieee80211_channel_switch *ch_switch) 6055 { 6056 struct il_priv *il = hw->priv; 6057 const struct il_channel_info *ch_info; 6058 struct ieee80211_conf *conf = &hw->conf; 6059 struct ieee80211_channel *channel = ch_switch->chandef.chan; 6060 struct il_ht_config *ht_conf = &il->current_ht_config; 6061 u16 ch; 6062 6063 D_MAC80211("enter\n"); 6064 6065 mutex_lock(&il->mutex); 6066 6067 if (il_is_rfkill(il)) 6068 goto out; 6069 6070 if (test_bit(S_EXIT_PENDING, &il->status) || 6071 test_bit(S_SCANNING, &il->status) || 6072 test_bit(S_CHANNEL_SWITCH_PENDING, &il->status)) 6073 goto out; 6074 6075 if (!il_is_associated(il)) 6076 goto out; 6077 6078 if (!il->ops->set_channel_switch) 6079 goto out; 6080 6081 ch = channel->hw_value; 6082 if (le16_to_cpu(il->active.channel) == ch) 6083 goto out; 6084 6085 ch_info = il_get_channel_info(il, channel->band, ch); 6086 if (!il_is_channel_valid(ch_info)) { 6087 D_MAC80211("invalid channel\n"); 6088 goto out; 6089 } 6090 6091 spin_lock_irq(&il->lock); 6092 6093 il->current_ht_config.smps = conf->smps_mode; 6094 6095 /* Configure HT40 channels */ 6096 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 6097 case NL80211_CHAN_NO_HT: 6098 case NL80211_CHAN_HT20: 6099 il->ht.is_40mhz = false; 6100 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 6101 break; 6102 case NL80211_CHAN_HT40MINUS: 6103 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 6104 il->ht.is_40mhz = true; 6105 break; 6106 case NL80211_CHAN_HT40PLUS: 6107 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 6108 il->ht.is_40mhz = true; 6109 break; 6110 } 6111 6112 if ((le16_to_cpu(il->staging.channel) != ch)) 6113 il->staging.flags = 0; 6114 6115 il_set_rxon_channel(il, channel); 6116 il_set_rxon_ht(il, ht_conf); 6117 il_set_flags_for_band(il, channel->band, il->vif); 6118 6119 spin_unlock_irq(&il->lock); 6120 6121 il_set_rate(il); 6122 /* 6123 * at this point, staging_rxon has the 6124 * configuration for channel switch 6125 */ 6126 set_bit(S_CHANNEL_SWITCH_PENDING, &il->status); 6127 il->switch_channel = cpu_to_le16(ch); 6128 if (il->ops->set_channel_switch(il, ch_switch)) { 6129 clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status); 6130 il->switch_channel = 0; 6131 ieee80211_chswitch_done(il->vif, false); 6132 } 6133 6134 out: 6135 mutex_unlock(&il->mutex); 6136 D_MAC80211("leave\n"); 6137 } 6138 6139 void 6140 il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, 6141 unsigned int *total_flags, u64 multicast) 6142 { 6143 struct il_priv *il = hw->priv; 6144 __le32 filter_or = 0, filter_nand = 0; 6145 6146 #define CHK(test, flag) do { \ 6147 if (*total_flags & (test)) \ 6148 filter_or |= (flag); \ 6149 else \ 6150 filter_nand |= (flag); \ 6151 } while (0) 6152 6153 D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags, 6154 *total_flags); 6155 6156 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 6157 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 6158 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 6159 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 6160 6161 #undef CHK 6162 6163 mutex_lock(&il->mutex); 6164 6165 il->staging.filter_flags &= ~filter_nand; 6166 il->staging.filter_flags |= filter_or; 6167 6168 /* 6169 * Not committing directly because hardware can perform a scan, 6170 * but we'll eventually commit the filter flags change anyway. 6171 */ 6172 6173 mutex_unlock(&il->mutex); 6174 6175 /* 6176 * Receiving all multicast frames is always enabled by the 6177 * default flags setup in il_connection_init_rx_config() 6178 * since we currently do not support programming multicast 6179 * filters into the device. 6180 */ 6181 *total_flags &= 6182 FIF_OTHER_BSS | FIF_ALLMULTI | 6183 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 6184 } 6185 6186 /***************************************************************************** 6187 * 6188 * driver setup and teardown 6189 * 6190 *****************************************************************************/ 6191 6192 static void 6193 il4965_bg_txpower_work(struct work_struct *work) 6194 { 6195 struct il_priv *il = container_of(work, struct il_priv, 6196 txpower_work); 6197 6198 mutex_lock(&il->mutex); 6199 6200 /* If a scan happened to start before we got here 6201 * then just return; the stats notification will 6202 * kick off another scheduled work to compensate for 6203 * any temperature delta we missed here. */ 6204 if (test_bit(S_EXIT_PENDING, &il->status) || 6205 test_bit(S_SCANNING, &il->status)) 6206 goto out; 6207 6208 /* Regardless of if we are associated, we must reconfigure the 6209 * TX power since frames can be sent on non-radar channels while 6210 * not associated */ 6211 il->ops->send_tx_power(il); 6212 6213 /* Update last_temperature to keep is_calib_needed from running 6214 * when it isn't needed... */ 6215 il->last_temperature = il->temperature; 6216 out: 6217 mutex_unlock(&il->mutex); 6218 } 6219 6220 static void 6221 il4965_setup_deferred_work(struct il_priv *il) 6222 { 6223 il->workqueue = create_singlethread_workqueue(DRV_NAME); 6224 6225 init_waitqueue_head(&il->wait_command_queue); 6226 6227 INIT_WORK(&il->restart, il4965_bg_restart); 6228 INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish); 6229 INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work); 6230 INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start); 6231 INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start); 6232 6233 il_setup_scan_deferred_work(il); 6234 6235 INIT_WORK(&il->txpower_work, il4965_bg_txpower_work); 6236 6237 timer_setup(&il->stats_periodic, il4965_bg_stats_periodic, 0); 6238 6239 timer_setup(&il->watchdog, il_bg_watchdog, 0); 6240 6241 tasklet_init(&il->irq_tasklet, 6242 il4965_irq_tasklet, 6243 (unsigned long)il); 6244 } 6245 6246 static void 6247 il4965_cancel_deferred_work(struct il_priv *il) 6248 { 6249 cancel_work_sync(&il->txpower_work); 6250 cancel_delayed_work_sync(&il->init_alive_start); 6251 cancel_delayed_work(&il->alive_start); 6252 cancel_work_sync(&il->run_time_calib_work); 6253 6254 il_cancel_scan_deferred_work(il); 6255 6256 del_timer_sync(&il->stats_periodic); 6257 } 6258 6259 static void 6260 il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates) 6261 { 6262 int i; 6263 6264 for (i = 0; i < RATE_COUNT_LEGACY; i++) { 6265 rates[i].bitrate = il_rates[i].ieee * 5; 6266 rates[i].hw_value = i; /* Rate scaling will work on idxes */ 6267 rates[i].hw_value_short = i; 6268 rates[i].flags = 0; 6269 if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) { 6270 /* 6271 * If CCK != 1M then set short preamble rate flag. 6272 */ 6273 rates[i].flags |= 6274 (il_rates[i].plcp == 6275 RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; 6276 } 6277 } 6278 } 6279 6280 /* 6281 * Acquire il->lock before calling this function ! 6282 */ 6283 void 6284 il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx) 6285 { 6286 il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8)); 6287 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx); 6288 } 6289 6290 void 6291 il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq, 6292 int tx_fifo_id, int scd_retry) 6293 { 6294 int txq_id = txq->q.id; 6295 6296 /* Find out whether to activate Tx queue */ 6297 int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0; 6298 6299 /* Set up and activate */ 6300 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), 6301 (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | 6302 (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) | 6303 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) | 6304 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) | 6305 IL49_SCD_QUEUE_STTS_REG_MSK); 6306 6307 txq->sched_retry = scd_retry; 6308 6309 D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate", 6310 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id); 6311 } 6312 6313 static const struct ieee80211_ops il4965_mac_ops = { 6314 .tx = il4965_mac_tx, 6315 .start = il4965_mac_start, 6316 .stop = il4965_mac_stop, 6317 .add_interface = il_mac_add_interface, 6318 .remove_interface = il_mac_remove_interface, 6319 .change_interface = il_mac_change_interface, 6320 .config = il_mac_config, 6321 .configure_filter = il4965_configure_filter, 6322 .set_key = il4965_mac_set_key, 6323 .update_tkip_key = il4965_mac_update_tkip_key, 6324 .conf_tx = il_mac_conf_tx, 6325 .reset_tsf = il_mac_reset_tsf, 6326 .bss_info_changed = il_mac_bss_info_changed, 6327 .ampdu_action = il4965_mac_ampdu_action, 6328 .hw_scan = il_mac_hw_scan, 6329 .sta_add = il4965_mac_sta_add, 6330 .sta_remove = il_mac_sta_remove, 6331 .channel_switch = il4965_mac_channel_switch, 6332 .tx_last_beacon = il_mac_tx_last_beacon, 6333 .flush = il_mac_flush, 6334 }; 6335 6336 static int 6337 il4965_init_drv(struct il_priv *il) 6338 { 6339 int ret; 6340 6341 spin_lock_init(&il->sta_lock); 6342 spin_lock_init(&il->hcmd_lock); 6343 6344 INIT_LIST_HEAD(&il->free_frames); 6345 6346 mutex_init(&il->mutex); 6347 6348 il->ieee_channels = NULL; 6349 il->ieee_rates = NULL; 6350 il->band = NL80211_BAND_2GHZ; 6351 6352 il->iw_mode = NL80211_IFTYPE_STATION; 6353 il->current_ht_config.smps = IEEE80211_SMPS_STATIC; 6354 il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF; 6355 6356 /* initialize force reset */ 6357 il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD; 6358 6359 /* Choose which receivers/antennas to use */ 6360 if (il->ops->set_rxon_chain) 6361 il->ops->set_rxon_chain(il); 6362 6363 il_init_scan_params(il); 6364 6365 ret = il_init_channel_map(il); 6366 if (ret) { 6367 IL_ERR("initializing regulatory failed: %d\n", ret); 6368 goto err; 6369 } 6370 6371 ret = il_init_geos(il); 6372 if (ret) { 6373 IL_ERR("initializing geos failed: %d\n", ret); 6374 goto err_free_channel_map; 6375 } 6376 il4965_init_hw_rates(il, il->ieee_rates); 6377 6378 return 0; 6379 6380 err_free_channel_map: 6381 il_free_channel_map(il); 6382 err: 6383 return ret; 6384 } 6385 6386 static void 6387 il4965_uninit_drv(struct il_priv *il) 6388 { 6389 il_free_geos(il); 6390 il_free_channel_map(il); 6391 kfree(il->scan_cmd); 6392 } 6393 6394 static void 6395 il4965_hw_detect(struct il_priv *il) 6396 { 6397 il->hw_rev = _il_rd(il, CSR_HW_REV); 6398 il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG); 6399 il->rev_id = il->pci_dev->revision; 6400 D_INFO("HW Revision ID = 0x%X\n", il->rev_id); 6401 } 6402 6403 static const struct il_sensitivity_ranges il4965_sensitivity = { 6404 .min_nrg_cck = 97, 6405 .max_nrg_cck = 0, /* not used, set to 0 */ 6406 6407 .auto_corr_min_ofdm = 85, 6408 .auto_corr_min_ofdm_mrc = 170, 6409 .auto_corr_min_ofdm_x1 = 105, 6410 .auto_corr_min_ofdm_mrc_x1 = 220, 6411 6412 .auto_corr_max_ofdm = 120, 6413 .auto_corr_max_ofdm_mrc = 210, 6414 .auto_corr_max_ofdm_x1 = 140, 6415 .auto_corr_max_ofdm_mrc_x1 = 270, 6416 6417 .auto_corr_min_cck = 125, 6418 .auto_corr_max_cck = 200, 6419 .auto_corr_min_cck_mrc = 200, 6420 .auto_corr_max_cck_mrc = 400, 6421 6422 .nrg_th_cck = 100, 6423 .nrg_th_ofdm = 100, 6424 6425 .barker_corr_th_min = 190, 6426 .barker_corr_th_min_mrc = 390, 6427 .nrg_th_cca = 62, 6428 }; 6429 6430 static void 6431 il4965_set_hw_params(struct il_priv *il) 6432 { 6433 il->hw_params.bcast_id = IL4965_BROADCAST_ID; 6434 il->hw_params.max_rxq_size = RX_QUEUE_SIZE; 6435 il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG; 6436 if (il->cfg->mod_params->amsdu_size_8K) 6437 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K); 6438 else 6439 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K); 6440 6441 il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL; 6442 6443 if (il->cfg->mod_params->disable_11n) 6444 il->cfg->sku &= ~IL_SKU_N; 6445 6446 if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES && 6447 il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES) 6448 il->cfg->num_of_queues = 6449 il->cfg->mod_params->num_of_queues; 6450 6451 il->hw_params.max_txq_num = il->cfg->num_of_queues; 6452 il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM; 6453 il->hw_params.scd_bc_tbls_size = 6454 il->cfg->num_of_queues * 6455 sizeof(struct il4965_scd_bc_tbl); 6456 6457 il->hw_params.tfd_size = sizeof(struct il_tfd); 6458 il->hw_params.max_stations = IL4965_STATION_COUNT; 6459 il->hw_params.max_data_size = IL49_RTC_DATA_SIZE; 6460 il->hw_params.max_inst_size = IL49_RTC_INST_SIZE; 6461 il->hw_params.max_bsm_size = BSM_SRAM_SIZE; 6462 il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ); 6463 6464 il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR; 6465 6466 il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant); 6467 il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant); 6468 il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant; 6469 il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant; 6470 6471 il->hw_params.ct_kill_threshold = 6472 celsius_to_kelvin(CT_KILL_THRESHOLD_LEGACY); 6473 6474 il->hw_params.sens = &il4965_sensitivity; 6475 il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS; 6476 } 6477 6478 static int 6479 il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 6480 { 6481 int err = 0; 6482 struct il_priv *il; 6483 struct ieee80211_hw *hw; 6484 struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data); 6485 unsigned long flags; 6486 u16 pci_cmd; 6487 6488 /************************ 6489 * 1. Allocating HW data 6490 ************************/ 6491 6492 hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops); 6493 if (!hw) { 6494 err = -ENOMEM; 6495 goto out; 6496 } 6497 il = hw->priv; 6498 il->hw = hw; 6499 SET_IEEE80211_DEV(hw, &pdev->dev); 6500 6501 D_INFO("*** LOAD DRIVER ***\n"); 6502 il->cfg = cfg; 6503 il->ops = &il4965_ops; 6504 #ifdef CONFIG_IWLEGACY_DEBUGFS 6505 il->debugfs_ops = &il4965_debugfs_ops; 6506 #endif 6507 il->pci_dev = pdev; 6508 il->inta_mask = CSR_INI_SET_MASK; 6509 6510 /************************** 6511 * 2. Initializing PCI bus 6512 **************************/ 6513 pci_disable_link_state(pdev, 6514 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | 6515 PCIE_LINK_STATE_CLKPM); 6516 6517 if (pci_enable_device(pdev)) { 6518 err = -ENODEV; 6519 goto out_ieee80211_free_hw; 6520 } 6521 6522 pci_set_master(pdev); 6523 6524 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); 6525 if (!err) 6526 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36)); 6527 if (err) { 6528 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 6529 if (!err) 6530 err = 6531 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 6532 /* both attempts failed: */ 6533 if (err) { 6534 IL_WARN("No suitable DMA available.\n"); 6535 goto out_pci_disable_device; 6536 } 6537 } 6538 6539 err = pci_request_regions(pdev, DRV_NAME); 6540 if (err) 6541 goto out_pci_disable_device; 6542 6543 pci_set_drvdata(pdev, il); 6544 6545 /*********************** 6546 * 3. Read REV register 6547 ***********************/ 6548 il->hw_base = pci_ioremap_bar(pdev, 0); 6549 if (!il->hw_base) { 6550 err = -ENODEV; 6551 goto out_pci_release_regions; 6552 } 6553 6554 D_INFO("pci_resource_len = 0x%08llx\n", 6555 (unsigned long long)pci_resource_len(pdev, 0)); 6556 D_INFO("pci_resource_base = %p\n", il->hw_base); 6557 6558 /* these spin locks will be used in apm_ops.init and EEPROM access 6559 * we should init now 6560 */ 6561 spin_lock_init(&il->reg_lock); 6562 spin_lock_init(&il->lock); 6563 6564 /* 6565 * stop and reset the on-board processor just in case it is in a 6566 * strange state ... like being left stranded by a primary kernel 6567 * and this is now the kdump kernel trying to start up 6568 */ 6569 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); 6570 6571 il4965_hw_detect(il); 6572 IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev); 6573 6574 /* We disable the RETRY_TIMEOUT register (0x41) to keep 6575 * PCI Tx retries from interfering with C3 CPU state */ 6576 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); 6577 6578 il4965_prepare_card_hw(il); 6579 if (!il->hw_ready) { 6580 IL_WARN("Failed, HW not ready\n"); 6581 err = -EIO; 6582 goto out_iounmap; 6583 } 6584 6585 /***************** 6586 * 4. Read EEPROM 6587 *****************/ 6588 /* Read the EEPROM */ 6589 err = il_eeprom_init(il); 6590 if (err) { 6591 IL_ERR("Unable to init EEPROM\n"); 6592 goto out_iounmap; 6593 } 6594 err = il4965_eeprom_check_version(il); 6595 if (err) 6596 goto out_free_eeprom; 6597 6598 /* extract MAC Address */ 6599 il4965_eeprom_get_mac(il, il->addresses[0].addr); 6600 D_INFO("MAC address: %pM\n", il->addresses[0].addr); 6601 il->hw->wiphy->addresses = il->addresses; 6602 il->hw->wiphy->n_addresses = 1; 6603 6604 /************************ 6605 * 5. Setup HW constants 6606 ************************/ 6607 il4965_set_hw_params(il); 6608 6609 /******************* 6610 * 6. Setup il 6611 *******************/ 6612 6613 err = il4965_init_drv(il); 6614 if (err) 6615 goto out_free_eeprom; 6616 /* At this point both hw and il are initialized. */ 6617 6618 /******************** 6619 * 7. Setup services 6620 ********************/ 6621 spin_lock_irqsave(&il->lock, flags); 6622 il_disable_interrupts(il); 6623 spin_unlock_irqrestore(&il->lock, flags); 6624 6625 pci_enable_msi(il->pci_dev); 6626 6627 err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il); 6628 if (err) { 6629 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq); 6630 goto out_disable_msi; 6631 } 6632 6633 il4965_setup_deferred_work(il); 6634 il4965_setup_handlers(il); 6635 6636 /********************************************* 6637 * 8. Enable interrupts and read RFKILL state 6638 *********************************************/ 6639 6640 /* enable rfkill interrupt: hw bug w/a */ 6641 pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd); 6642 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { 6643 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 6644 pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd); 6645 } 6646 6647 il_enable_rfkill_int(il); 6648 6649 /* If platform's RF_KILL switch is NOT set to KILL */ 6650 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) 6651 clear_bit(S_RFKILL, &il->status); 6652 else 6653 set_bit(S_RFKILL, &il->status); 6654 6655 wiphy_rfkill_set_hw_state(il->hw->wiphy, 6656 test_bit(S_RFKILL, &il->status)); 6657 6658 il_power_initialize(il); 6659 6660 init_completion(&il->_4965.firmware_loading_complete); 6661 6662 err = il4965_request_firmware(il, true); 6663 if (err) 6664 goto out_destroy_workqueue; 6665 6666 return 0; 6667 6668 out_destroy_workqueue: 6669 destroy_workqueue(il->workqueue); 6670 il->workqueue = NULL; 6671 free_irq(il->pci_dev->irq, il); 6672 out_disable_msi: 6673 pci_disable_msi(il->pci_dev); 6674 il4965_uninit_drv(il); 6675 out_free_eeprom: 6676 il_eeprom_free(il); 6677 out_iounmap: 6678 iounmap(il->hw_base); 6679 out_pci_release_regions: 6680 pci_release_regions(pdev); 6681 out_pci_disable_device: 6682 pci_disable_device(pdev); 6683 out_ieee80211_free_hw: 6684 ieee80211_free_hw(il->hw); 6685 out: 6686 return err; 6687 } 6688 6689 static void 6690 il4965_pci_remove(struct pci_dev *pdev) 6691 { 6692 struct il_priv *il = pci_get_drvdata(pdev); 6693 unsigned long flags; 6694 6695 if (!il) 6696 return; 6697 6698 wait_for_completion(&il->_4965.firmware_loading_complete); 6699 6700 D_INFO("*** UNLOAD DRIVER ***\n"); 6701 6702 il_dbgfs_unregister(il); 6703 sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group); 6704 6705 /* ieee80211_unregister_hw call wil cause il_mac_stop to 6706 * to be called and il4965_down since we are removing the device 6707 * we need to set S_EXIT_PENDING bit. 6708 */ 6709 set_bit(S_EXIT_PENDING, &il->status); 6710 6711 il_leds_exit(il); 6712 6713 if (il->mac80211_registered) { 6714 ieee80211_unregister_hw(il->hw); 6715 il->mac80211_registered = 0; 6716 } else { 6717 il4965_down(il); 6718 } 6719 6720 /* 6721 * Make sure device is reset to low power before unloading driver. 6722 * This may be redundant with il4965_down(), but there are paths to 6723 * run il4965_down() without calling apm_ops.stop(), and there are 6724 * paths to avoid running il4965_down() at all before leaving driver. 6725 * This (inexpensive) call *makes sure* device is reset. 6726 */ 6727 il_apm_stop(il); 6728 6729 /* make sure we flush any pending irq or 6730 * tasklet for the driver 6731 */ 6732 spin_lock_irqsave(&il->lock, flags); 6733 il_disable_interrupts(il); 6734 spin_unlock_irqrestore(&il->lock, flags); 6735 6736 il4965_synchronize_irq(il); 6737 6738 il4965_dealloc_ucode_pci(il); 6739 6740 if (il->rxq.bd) 6741 il4965_rx_queue_free(il, &il->rxq); 6742 il4965_hw_txq_ctx_free(il); 6743 6744 il_eeprom_free(il); 6745 6746 /*netif_stop_queue(dev); */ 6747 flush_workqueue(il->workqueue); 6748 6749 /* ieee80211_unregister_hw calls il_mac_stop, which flushes 6750 * il->workqueue... so we can't take down the workqueue 6751 * until now... */ 6752 destroy_workqueue(il->workqueue); 6753 il->workqueue = NULL; 6754 6755 free_irq(il->pci_dev->irq, il); 6756 pci_disable_msi(il->pci_dev); 6757 iounmap(il->hw_base); 6758 pci_release_regions(pdev); 6759 pci_disable_device(pdev); 6760 6761 il4965_uninit_drv(il); 6762 6763 dev_kfree_skb(il->beacon_skb); 6764 6765 ieee80211_free_hw(il->hw); 6766 } 6767 6768 /* 6769 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask 6770 * must be called under il->lock and mac access 6771 */ 6772 void 6773 il4965_txq_set_sched(struct il_priv *il, u32 mask) 6774 { 6775 il_wr_prph(il, IL49_SCD_TXFACT, mask); 6776 } 6777 6778 /***************************************************************************** 6779 * 6780 * driver and module entry point 6781 * 6782 *****************************************************************************/ 6783 6784 /* Hardware specific file defines the PCI IDs table for that hardware module */ 6785 static const struct pci_device_id il4965_hw_card_ids[] = { 6786 {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)}, 6787 {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)}, 6788 {0} 6789 }; 6790 MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids); 6791 6792 static struct pci_driver il4965_driver = { 6793 .name = DRV_NAME, 6794 .id_table = il4965_hw_card_ids, 6795 .probe = il4965_pci_probe, 6796 .remove = il4965_pci_remove, 6797 .driver.pm = IL_LEGACY_PM_OPS, 6798 }; 6799 6800 static int __init 6801 il4965_init(void) 6802 { 6803 6804 int ret; 6805 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n"); 6806 pr_info(DRV_COPYRIGHT "\n"); 6807 6808 ret = il4965_rate_control_register(); 6809 if (ret) { 6810 pr_err("Unable to register rate control algorithm: %d\n", ret); 6811 return ret; 6812 } 6813 6814 ret = pci_register_driver(&il4965_driver); 6815 if (ret) { 6816 pr_err("Unable to initialize PCI module\n"); 6817 goto error_register; 6818 } 6819 6820 return ret; 6821 6822 error_register: 6823 il4965_rate_control_unregister(); 6824 return ret; 6825 } 6826 6827 static void __exit 6828 il4965_exit(void) 6829 { 6830 pci_unregister_driver(&il4965_driver); 6831 il4965_rate_control_unregister(); 6832 } 6833 6834 module_exit(il4965_exit); 6835 module_init(il4965_init); 6836 6837 #ifdef CONFIG_IWLEGACY_DEBUG 6838 module_param_named(debug, il_debug_level, uint, 0644); 6839 MODULE_PARM_DESC(debug, "debug output mask"); 6840 #endif 6841 6842 module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, 0444); 6843 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])"); 6844 module_param_named(queues_num, il4965_mod_params.num_of_queues, int, 0444); 6845 MODULE_PARM_DESC(queues_num, "number of hw queues."); 6846 module_param_named(11n_disable, il4965_mod_params.disable_11n, int, 0444); 6847 MODULE_PARM_DESC(11n_disable, "disable 11n functionality"); 6848 module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 0444); 6849 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])"); 6850 module_param_named(fw_restart, il4965_mod_params.restart_fw, int, 0444); 6851 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error"); 6852