1 /****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. 4 * 5 * Portions of this file are derived from the ipw3945 project, as well 6 * as portions of the ieee80211 subsystem header files. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of version 2 of the GNU General Public License as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along with 18 * this program; if not, write to the Free Software Foundation, Inc., 19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 20 * 21 * The full GNU General Public License is included in this distribution in the 22 * file called LICENSE. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <ilw@linux.intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 *****************************************************************************/ 29 30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 31 32 #include <linux/kernel.h> 33 #include <linux/module.h> 34 #include <linux/init.h> 35 #include <linux/pci.h> 36 #include <linux/pci-aspm.h> 37 #include <linux/slab.h> 38 #include <linux/dma-mapping.h> 39 #include <linux/delay.h> 40 #include <linux/sched.h> 41 #include <linux/skbuff.h> 42 #include <linux/netdevice.h> 43 #include <linux/firmware.h> 44 #include <linux/etherdevice.h> 45 #include <linux/if_arp.h> 46 47 #include <net/mac80211.h> 48 49 #include <asm/div64.h> 50 51 #define DRV_NAME "iwl4965" 52 53 #include "common.h" 54 #include "4965.h" 55 56 /****************************************************************************** 57 * 58 * module boiler plate 59 * 60 ******************************************************************************/ 61 62 /* 63 * module name, copyright, version, etc. 64 */ 65 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux" 66 67 #ifdef CONFIG_IWLEGACY_DEBUG 68 #define VD "d" 69 #else 70 #define VD 71 #endif 72 73 #define DRV_VERSION IWLWIFI_VERSION VD 74 75 MODULE_DESCRIPTION(DRV_DESCRIPTION); 76 MODULE_VERSION(DRV_VERSION); 77 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); 78 MODULE_LICENSE("GPL"); 79 MODULE_ALIAS("iwl4965"); 80 81 void 82 il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status) 83 { 84 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { 85 IL_ERR("Tx flush command to flush out all frames\n"); 86 if (!test_bit(S_EXIT_PENDING, &il->status)) 87 queue_work(il->workqueue, &il->tx_flush); 88 } 89 } 90 91 /* 92 * EEPROM 93 */ 94 struct il_mod_params il4965_mod_params = { 95 .restart_fw = 1, 96 /* the rest are 0 by default */ 97 }; 98 99 void 100 il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq) 101 { 102 unsigned long flags; 103 int i; 104 spin_lock_irqsave(&rxq->lock, flags); 105 INIT_LIST_HEAD(&rxq->rx_free); 106 INIT_LIST_HEAD(&rxq->rx_used); 107 /* Fill the rx_used queue with _all_ of the Rx buffers */ 108 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { 109 /* In the reset function, these buffers may have been allocated 110 * to an SKB, so we need to unmap and free potential storage */ 111 if (rxq->pool[i].page != NULL) { 112 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma, 113 PAGE_SIZE << il->hw_params.rx_page_order, 114 PCI_DMA_FROMDEVICE); 115 __il_free_pages(il, rxq->pool[i].page); 116 rxq->pool[i].page = NULL; 117 } 118 list_add_tail(&rxq->pool[i].list, &rxq->rx_used); 119 } 120 121 for (i = 0; i < RX_QUEUE_SIZE; i++) 122 rxq->queue[i] = NULL; 123 124 /* Set us so that we have processed and used all buffers, but have 125 * not restocked the Rx queue with fresh buffers */ 126 rxq->read = rxq->write = 0; 127 rxq->write_actual = 0; 128 rxq->free_count = 0; 129 spin_unlock_irqrestore(&rxq->lock, flags); 130 } 131 132 int 133 il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq) 134 { 135 u32 rb_size; 136 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ 137 u32 rb_timeout = 0; 138 139 if (il->cfg->mod_params->amsdu_size_8K) 140 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; 141 else 142 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; 143 144 /* Stop Rx DMA */ 145 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); 146 147 /* Reset driver's Rx queue write idx */ 148 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); 149 150 /* Tell device where to find RBD circular buffer in DRAM */ 151 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8)); 152 153 /* Tell device where in DRAM to update its Rx status */ 154 il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4); 155 156 /* Enable Rx DMA 157 * Direct rx interrupts to hosts 158 * Rx buffer size 4 or 8k 159 * RB timeout 0x10 160 * 256 RBDs 161 */ 162 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 163 FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | 164 FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | 165 FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | 166 rb_size | 167 (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) | 168 (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); 169 170 /* Set interrupt coalescing timer to default (2048 usecs) */ 171 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF); 172 173 return 0; 174 } 175 176 static void 177 il4965_set_pwr_vmain(struct il_priv *il) 178 { 179 /* 180 * (for documentation purposes) 181 * to set power to V_AUX, do: 182 183 if (pci_pme_capable(il->pci_dev, PCI_D3cold)) 184 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, 185 APMG_PS_CTRL_VAL_PWR_SRC_VAUX, 186 ~APMG_PS_CTRL_MSK_PWR_SRC); 187 */ 188 189 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG, 190 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, 191 ~APMG_PS_CTRL_MSK_PWR_SRC); 192 } 193 194 int 195 il4965_hw_nic_init(struct il_priv *il) 196 { 197 unsigned long flags; 198 struct il_rx_queue *rxq = &il->rxq; 199 int ret; 200 201 spin_lock_irqsave(&il->lock, flags); 202 il_apm_init(il); 203 /* Set interrupt coalescing calibration timer to default (512 usecs) */ 204 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF); 205 spin_unlock_irqrestore(&il->lock, flags); 206 207 il4965_set_pwr_vmain(il); 208 il4965_nic_config(il); 209 210 /* Allocate the RX queue, or reset if it is already allocated */ 211 if (!rxq->bd) { 212 ret = il_rx_queue_alloc(il); 213 if (ret) { 214 IL_ERR("Unable to initialize Rx queue\n"); 215 return -ENOMEM; 216 } 217 } else 218 il4965_rx_queue_reset(il, rxq); 219 220 il4965_rx_replenish(il); 221 222 il4965_rx_init(il, rxq); 223 224 spin_lock_irqsave(&il->lock, flags); 225 226 rxq->need_update = 1; 227 il_rx_queue_update_write_ptr(il, rxq); 228 229 spin_unlock_irqrestore(&il->lock, flags); 230 231 /* Allocate or reset and init all Tx and Command queues */ 232 if (!il->txq) { 233 ret = il4965_txq_ctx_alloc(il); 234 if (ret) 235 return ret; 236 } else 237 il4965_txq_ctx_reset(il); 238 239 set_bit(S_INIT, &il->status); 240 241 return 0; 242 } 243 244 /** 245 * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr 246 */ 247 static inline __le32 248 il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr) 249 { 250 return cpu_to_le32((u32) (dma_addr >> 8)); 251 } 252 253 /** 254 * il4965_rx_queue_restock - refill RX queue from pre-allocated pool 255 * 256 * If there are slots in the RX queue that need to be restocked, 257 * and we have free pre-allocated buffers, fill the ranks as much 258 * as we can, pulling from rx_free. 259 * 260 * This moves the 'write' idx forward to catch up with 'processed', and 261 * also updates the memory address in the firmware to reference the new 262 * target buffer. 263 */ 264 void 265 il4965_rx_queue_restock(struct il_priv *il) 266 { 267 struct il_rx_queue *rxq = &il->rxq; 268 struct list_head *element; 269 struct il_rx_buf *rxb; 270 unsigned long flags; 271 272 spin_lock_irqsave(&rxq->lock, flags); 273 while (il_rx_queue_space(rxq) > 0 && rxq->free_count) { 274 /* The overwritten rxb must be a used one */ 275 rxb = rxq->queue[rxq->write]; 276 BUG_ON(rxb && rxb->page); 277 278 /* Get next free Rx buffer, remove from free list */ 279 element = rxq->rx_free.next; 280 rxb = list_entry(element, struct il_rx_buf, list); 281 list_del(element); 282 283 /* Point to Rx buffer via next RBD in circular buffer */ 284 rxq->bd[rxq->write] = 285 il4965_dma_addr2rbd_ptr(il, rxb->page_dma); 286 rxq->queue[rxq->write] = rxb; 287 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; 288 rxq->free_count--; 289 } 290 spin_unlock_irqrestore(&rxq->lock, flags); 291 /* If the pre-allocated buffer pool is dropping low, schedule to 292 * refill it */ 293 if (rxq->free_count <= RX_LOW_WATERMARK) 294 queue_work(il->workqueue, &il->rx_replenish); 295 296 /* If we've added more space for the firmware to place data, tell it. 297 * Increment device's write pointer in multiples of 8. */ 298 if (rxq->write_actual != (rxq->write & ~0x7)) { 299 spin_lock_irqsave(&rxq->lock, flags); 300 rxq->need_update = 1; 301 spin_unlock_irqrestore(&rxq->lock, flags); 302 il_rx_queue_update_write_ptr(il, rxq); 303 } 304 } 305 306 /** 307 * il4965_rx_replenish - Move all used packet from rx_used to rx_free 308 * 309 * When moving to rx_free an SKB is allocated for the slot. 310 * 311 * Also restock the Rx queue via il_rx_queue_restock. 312 * This is called as a scheduled work item (except for during initialization) 313 */ 314 static void 315 il4965_rx_allocate(struct il_priv *il, gfp_t priority) 316 { 317 struct il_rx_queue *rxq = &il->rxq; 318 struct list_head *element; 319 struct il_rx_buf *rxb; 320 struct page *page; 321 dma_addr_t page_dma; 322 unsigned long flags; 323 gfp_t gfp_mask = priority; 324 325 while (1) { 326 spin_lock_irqsave(&rxq->lock, flags); 327 if (list_empty(&rxq->rx_used)) { 328 spin_unlock_irqrestore(&rxq->lock, flags); 329 return; 330 } 331 spin_unlock_irqrestore(&rxq->lock, flags); 332 333 if (rxq->free_count > RX_LOW_WATERMARK) 334 gfp_mask |= __GFP_NOWARN; 335 336 if (il->hw_params.rx_page_order > 0) 337 gfp_mask |= __GFP_COMP; 338 339 /* Alloc a new receive buffer */ 340 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order); 341 if (!page) { 342 if (net_ratelimit()) 343 D_INFO("alloc_pages failed, " "order: %d\n", 344 il->hw_params.rx_page_order); 345 346 if (rxq->free_count <= RX_LOW_WATERMARK && 347 net_ratelimit()) 348 IL_ERR("Failed to alloc_pages with %s. " 349 "Only %u free buffers remaining.\n", 350 priority == 351 GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL", 352 rxq->free_count); 353 /* We don't reschedule replenish work here -- we will 354 * call the restock method and if it still needs 355 * more buffers it will schedule replenish */ 356 return; 357 } 358 359 /* Get physical address of the RB */ 360 page_dma = 361 pci_map_page(il->pci_dev, page, 0, 362 PAGE_SIZE << il->hw_params.rx_page_order, 363 PCI_DMA_FROMDEVICE); 364 if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) { 365 __free_pages(page, il->hw_params.rx_page_order); 366 break; 367 } 368 369 spin_lock_irqsave(&rxq->lock, flags); 370 371 if (list_empty(&rxq->rx_used)) { 372 spin_unlock_irqrestore(&rxq->lock, flags); 373 pci_unmap_page(il->pci_dev, page_dma, 374 PAGE_SIZE << il->hw_params.rx_page_order, 375 PCI_DMA_FROMDEVICE); 376 __free_pages(page, il->hw_params.rx_page_order); 377 return; 378 } 379 380 element = rxq->rx_used.next; 381 rxb = list_entry(element, struct il_rx_buf, list); 382 list_del(element); 383 384 BUG_ON(rxb->page); 385 386 rxb->page = page; 387 rxb->page_dma = page_dma; 388 list_add_tail(&rxb->list, &rxq->rx_free); 389 rxq->free_count++; 390 il->alloc_rxb_page++; 391 392 spin_unlock_irqrestore(&rxq->lock, flags); 393 } 394 } 395 396 void 397 il4965_rx_replenish(struct il_priv *il) 398 { 399 unsigned long flags; 400 401 il4965_rx_allocate(il, GFP_KERNEL); 402 403 spin_lock_irqsave(&il->lock, flags); 404 il4965_rx_queue_restock(il); 405 spin_unlock_irqrestore(&il->lock, flags); 406 } 407 408 void 409 il4965_rx_replenish_now(struct il_priv *il) 410 { 411 il4965_rx_allocate(il, GFP_ATOMIC); 412 413 il4965_rx_queue_restock(il); 414 } 415 416 /* Assumes that the skb field of the buffers in 'pool' is kept accurate. 417 * If an SKB has been detached, the POOL needs to have its SKB set to NULL 418 * This free routine walks the list of POOL entries and if SKB is set to 419 * non NULL it is unmapped and freed 420 */ 421 void 422 il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq) 423 { 424 int i; 425 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { 426 if (rxq->pool[i].page != NULL) { 427 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma, 428 PAGE_SIZE << il->hw_params.rx_page_order, 429 PCI_DMA_FROMDEVICE); 430 __il_free_pages(il, rxq->pool[i].page); 431 rxq->pool[i].page = NULL; 432 } 433 } 434 435 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, 436 rxq->bd_dma); 437 dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status), 438 rxq->rb_stts, rxq->rb_stts_dma); 439 rxq->bd = NULL; 440 rxq->rb_stts = NULL; 441 } 442 443 int 444 il4965_rxq_stop(struct il_priv *il) 445 { 446 int ret; 447 448 _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0); 449 ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG, 450 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 451 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 452 1000); 453 if (ret < 0) 454 IL_ERR("Can't stop Rx DMA.\n"); 455 456 return 0; 457 } 458 459 int 460 il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band) 461 { 462 int idx = 0; 463 int band_offset = 0; 464 465 /* HT rate format: mac80211 wants an MCS number, which is just LSB */ 466 if (rate_n_flags & RATE_MCS_HT_MSK) { 467 idx = (rate_n_flags & 0xff); 468 return idx; 469 /* Legacy rate format, search for match in table */ 470 } else { 471 if (band == NL80211_BAND_5GHZ) 472 band_offset = IL_FIRST_OFDM_RATE; 473 for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++) 474 if (il_rates[idx].plcp == (rate_n_flags & 0xFF)) 475 return idx - band_offset; 476 } 477 478 return -1; 479 } 480 481 static int 482 il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp) 483 { 484 /* data from PHY/DSP regarding signal strength, etc., 485 * contents are always there, not configurable by host. */ 486 struct il4965_rx_non_cfg_phy *ncphy = 487 (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf; 488 u32 agc = 489 (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >> 490 IL49_AGC_DB_POS; 491 492 u32 valid_antennae = 493 (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK) 494 >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET; 495 u8 max_rssi = 0; 496 u32 i; 497 498 /* Find max rssi among 3 possible receivers. 499 * These values are measured by the digital signal processor (DSP). 500 * They should stay fairly constant even as the signal strength varies, 501 * if the radio's automatic gain control (AGC) is working right. 502 * AGC value (see below) will provide the "interesting" info. */ 503 for (i = 0; i < 3; i++) 504 if (valid_antennae & (1 << i)) 505 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi); 506 507 D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n", 508 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4], 509 max_rssi, agc); 510 511 /* dBm = max_rssi dB - agc dB - constant. 512 * Higher AGC (higher radio gain) means lower signal. */ 513 return max_rssi - agc - IL4965_RSSI_OFFSET; 514 } 515 516 static u32 517 il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in) 518 { 519 u32 decrypt_out = 0; 520 521 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == 522 RX_RES_STATUS_STATION_FOUND) 523 decrypt_out |= 524 (RX_RES_STATUS_STATION_FOUND | 525 RX_RES_STATUS_NO_STATION_INFO_MISMATCH); 526 527 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); 528 529 /* packet was not encrypted */ 530 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == 531 RX_RES_STATUS_SEC_TYPE_NONE) 532 return decrypt_out; 533 534 /* packet was encrypted with unknown alg */ 535 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == 536 RX_RES_STATUS_SEC_TYPE_ERR) 537 return decrypt_out; 538 539 /* decryption was not done in HW */ 540 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != 541 RX_MPDU_RES_STATUS_DEC_DONE_MSK) 542 return decrypt_out; 543 544 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { 545 546 case RX_RES_STATUS_SEC_TYPE_CCMP: 547 /* alg is CCM: check MIC only */ 548 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) 549 /* Bad MIC */ 550 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; 551 else 552 decrypt_out |= RX_RES_STATUS_DECRYPT_OK; 553 554 break; 555 556 case RX_RES_STATUS_SEC_TYPE_TKIP: 557 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { 558 /* Bad TTAK */ 559 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; 560 break; 561 } 562 /* fall through if TTAK OK */ 563 default: 564 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) 565 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; 566 else 567 decrypt_out |= RX_RES_STATUS_DECRYPT_OK; 568 break; 569 } 570 571 D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out); 572 573 return decrypt_out; 574 } 575 576 #define SMALL_PACKET_SIZE 256 577 578 static void 579 il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr, 580 u32 len, u32 ampdu_status, struct il_rx_buf *rxb, 581 struct ieee80211_rx_status *stats) 582 { 583 struct sk_buff *skb; 584 __le16 fc = hdr->frame_control; 585 586 /* We only process data packets if the interface is open */ 587 if (unlikely(!il->is_open)) { 588 D_DROP("Dropping packet while interface is not open.\n"); 589 return; 590 } 591 592 if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) { 593 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE); 594 D_INFO("Woke queues - frame received on passive channel\n"); 595 } 596 597 /* In case of HW accelerated crypto and bad decryption, drop */ 598 if (!il->cfg->mod_params->sw_crypto && 599 il_set_decrypted_flag(il, hdr, ampdu_status, stats)) 600 return; 601 602 skb = dev_alloc_skb(SMALL_PACKET_SIZE); 603 if (!skb) { 604 IL_ERR("dev_alloc_skb failed\n"); 605 return; 606 } 607 608 if (len <= SMALL_PACKET_SIZE) { 609 memcpy(skb_put(skb, len), hdr, len); 610 } else { 611 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), 612 len, PAGE_SIZE << il->hw_params.rx_page_order); 613 il->alloc_rxb_page--; 614 rxb->page = NULL; 615 } 616 617 il_update_stats(il, false, fc, len); 618 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); 619 620 ieee80211_rx(il->hw, skb); 621 } 622 623 /* Called for N_RX (legacy ABG frames), or 624 * N_RX_MPDU (HT high-throughput N frames). */ 625 static void 626 il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb) 627 { 628 struct ieee80211_hdr *header; 629 struct ieee80211_rx_status rx_status = {}; 630 struct il_rx_pkt *pkt = rxb_addr(rxb); 631 struct il_rx_phy_res *phy_res; 632 __le32 rx_pkt_status; 633 struct il_rx_mpdu_res_start *amsdu; 634 u32 len; 635 u32 ampdu_status; 636 u32 rate_n_flags; 637 638 /** 639 * N_RX and N_RX_MPDU are handled differently. 640 * N_RX: physical layer info is in this buffer 641 * N_RX_MPDU: physical layer info was sent in separate 642 * command and cached in il->last_phy_res 643 * 644 * Here we set up local variables depending on which command is 645 * received. 646 */ 647 if (pkt->hdr.cmd == N_RX) { 648 phy_res = (struct il_rx_phy_res *)pkt->u.raw; 649 header = 650 (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) + 651 phy_res->cfg_phy_cnt); 652 653 len = le16_to_cpu(phy_res->byte_count); 654 rx_pkt_status = 655 *(__le32 *) (pkt->u.raw + sizeof(*phy_res) + 656 phy_res->cfg_phy_cnt + len); 657 ampdu_status = le32_to_cpu(rx_pkt_status); 658 } else { 659 if (!il->_4965.last_phy_res_valid) { 660 IL_ERR("MPDU frame without cached PHY data\n"); 661 return; 662 } 663 phy_res = &il->_4965.last_phy_res; 664 amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw; 665 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); 666 len = le16_to_cpu(amsdu->byte_count); 667 rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len); 668 ampdu_status = 669 il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status)); 670 } 671 672 if ((unlikely(phy_res->cfg_phy_cnt > 20))) { 673 D_DROP("dsp size out of range [0,20]: %d\n", 674 phy_res->cfg_phy_cnt); 675 return; 676 } 677 678 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || 679 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { 680 D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status)); 681 return; 682 } 683 684 /* This will be used in several places later */ 685 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); 686 687 /* rx_status carries information about the packet to mac80211 */ 688 rx_status.mactime = le64_to_cpu(phy_res->timestamp); 689 rx_status.band = 690 (phy_res-> 691 phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ : 692 NL80211_BAND_5GHZ; 693 rx_status.freq = 694 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel), 695 rx_status.band); 696 rx_status.rate_idx = 697 il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); 698 rx_status.flag = 0; 699 700 /* TSF isn't reliable. In order to allow smooth user experience, 701 * this W/A doesn't propagate it to the mac80211 */ 702 /*rx_status.flag |= RX_FLAG_MACTIME_START; */ 703 704 il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp); 705 706 /* Find max signal strength (dBm) among 3 antenna/receiver chains */ 707 rx_status.signal = il4965_calc_rssi(il, phy_res); 708 709 D_STATS("Rssi %d, TSF %llu\n", rx_status.signal, 710 (unsigned long long)rx_status.mactime); 711 712 /* 713 * "antenna number" 714 * 715 * It seems that the antenna field in the phy flags value 716 * is actually a bit field. This is undefined by radiotap, 717 * it wants an actual antenna number but I always get "7" 718 * for most legacy frames I receive indicating that the 719 * same frame was received on all three RX chains. 720 * 721 * I think this field should be removed in favor of a 722 * new 802.11n radiotap field "RX chains" that is defined 723 * as a bitmask. 724 */ 725 rx_status.antenna = 726 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 727 RX_RES_PHY_FLAGS_ANTENNA_POS; 728 729 /* set the preamble flag if appropriate */ 730 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) 731 rx_status.flag |= RX_FLAG_SHORTPRE; 732 733 /* Set up the HT phy flags */ 734 if (rate_n_flags & RATE_MCS_HT_MSK) 735 rx_status.flag |= RX_FLAG_HT; 736 if (rate_n_flags & RATE_MCS_HT40_MSK) 737 rx_status.flag |= RX_FLAG_40MHZ; 738 if (rate_n_flags & RATE_MCS_SGI_MSK) 739 rx_status.flag |= RX_FLAG_SHORT_GI; 740 741 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) { 742 /* We know which subframes of an A-MPDU belong 743 * together since we get a single PHY response 744 * from the firmware for all of them. 745 */ 746 747 rx_status.flag |= RX_FLAG_AMPDU_DETAILS; 748 rx_status.ampdu_reference = il->_4965.ampdu_ref; 749 } 750 751 il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb, 752 &rx_status); 753 } 754 755 /* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY). 756 * This will be used later in il_hdl_rx() for N_RX_MPDU. */ 757 static void 758 il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb) 759 { 760 struct il_rx_pkt *pkt = rxb_addr(rxb); 761 il->_4965.last_phy_res_valid = true; 762 il->_4965.ampdu_ref++; 763 memcpy(&il->_4965.last_phy_res, pkt->u.raw, 764 sizeof(struct il_rx_phy_res)); 765 } 766 767 static int 768 il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif, 769 enum nl80211_band band, u8 is_active, 770 u8 n_probes, struct il_scan_channel *scan_ch) 771 { 772 struct ieee80211_channel *chan; 773 const struct ieee80211_supported_band *sband; 774 const struct il_channel_info *ch_info; 775 u16 passive_dwell = 0; 776 u16 active_dwell = 0; 777 int added, i; 778 u16 channel; 779 780 sband = il_get_hw_mode(il, band); 781 if (!sband) 782 return 0; 783 784 active_dwell = il_get_active_dwell_time(il, band, n_probes); 785 passive_dwell = il_get_passive_dwell_time(il, band, vif); 786 787 if (passive_dwell <= active_dwell) 788 passive_dwell = active_dwell + 1; 789 790 for (i = 0, added = 0; i < il->scan_request->n_channels; i++) { 791 chan = il->scan_request->channels[i]; 792 793 if (chan->band != band) 794 continue; 795 796 channel = chan->hw_value; 797 scan_ch->channel = cpu_to_le16(channel); 798 799 ch_info = il_get_channel_info(il, band, channel); 800 if (!il_is_channel_valid(ch_info)) { 801 D_SCAN("Channel %d is INVALID for this band.\n", 802 channel); 803 continue; 804 } 805 806 if (!is_active || il_is_channel_passive(ch_info) || 807 (chan->flags & IEEE80211_CHAN_NO_IR)) 808 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; 809 else 810 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; 811 812 if (n_probes) 813 scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes); 814 815 scan_ch->active_dwell = cpu_to_le16(active_dwell); 816 scan_ch->passive_dwell = cpu_to_le16(passive_dwell); 817 818 /* Set txpower levels to defaults */ 819 scan_ch->dsp_atten = 110; 820 821 /* NOTE: if we were doing 6Mb OFDM for scans we'd use 822 * power level: 823 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; 824 */ 825 if (band == NL80211_BAND_5GHZ) 826 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; 827 else 828 scan_ch->tx_gain = ((1 << 5) | (5 << 3)); 829 830 D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel, 831 le32_to_cpu(scan_ch->type), 832 (scan_ch-> 833 type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE", 834 (scan_ch-> 835 type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell : 836 passive_dwell); 837 838 scan_ch++; 839 added++; 840 } 841 842 D_SCAN("total channels to scan %d\n", added); 843 return added; 844 } 845 846 static void 847 il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid) 848 { 849 int i; 850 u8 ind = *ant; 851 852 for (i = 0; i < RATE_ANT_NUM - 1; i++) { 853 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0; 854 if (valid & BIT(ind)) { 855 *ant = ind; 856 return; 857 } 858 } 859 } 860 861 int 862 il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif) 863 { 864 struct il_host_cmd cmd = { 865 .id = C_SCAN, 866 .len = sizeof(struct il_scan_cmd), 867 .flags = CMD_SIZE_HUGE, 868 }; 869 struct il_scan_cmd *scan; 870 u32 rate_flags = 0; 871 u16 cmd_len; 872 u16 rx_chain = 0; 873 enum nl80211_band band; 874 u8 n_probes = 0; 875 u8 rx_ant = il->hw_params.valid_rx_ant; 876 u8 rate; 877 bool is_active = false; 878 int chan_mod; 879 u8 active_chains; 880 u8 scan_tx_antennas = il->hw_params.valid_tx_ant; 881 int ret; 882 883 lockdep_assert_held(&il->mutex); 884 885 if (!il->scan_cmd) { 886 il->scan_cmd = 887 kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE, 888 GFP_KERNEL); 889 if (!il->scan_cmd) { 890 D_SCAN("fail to allocate memory for scan\n"); 891 return -ENOMEM; 892 } 893 } 894 scan = il->scan_cmd; 895 memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE); 896 897 scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH; 898 scan->quiet_time = IL_ACTIVE_QUIET_TIME; 899 900 if (il_is_any_associated(il)) { 901 u16 interval; 902 u32 extra; 903 u32 suspend_time = 100; 904 u32 scan_suspend_time = 100; 905 906 D_INFO("Scanning while associated...\n"); 907 interval = vif->bss_conf.beacon_int; 908 909 scan->suspend_time = 0; 910 scan->max_out_time = cpu_to_le32(200 * 1024); 911 if (!interval) 912 interval = suspend_time; 913 914 extra = (suspend_time / interval) << 22; 915 scan_suspend_time = 916 (extra | ((suspend_time % interval) * 1024)); 917 scan->suspend_time = cpu_to_le32(scan_suspend_time); 918 D_SCAN("suspend_time 0x%X beacon interval %d\n", 919 scan_suspend_time, interval); 920 } 921 922 if (il->scan_request->n_ssids) { 923 int i, p = 0; 924 D_SCAN("Kicking off active scan\n"); 925 for (i = 0; i < il->scan_request->n_ssids; i++) { 926 /* always does wildcard anyway */ 927 if (!il->scan_request->ssids[i].ssid_len) 928 continue; 929 scan->direct_scan[p].id = WLAN_EID_SSID; 930 scan->direct_scan[p].len = 931 il->scan_request->ssids[i].ssid_len; 932 memcpy(scan->direct_scan[p].ssid, 933 il->scan_request->ssids[i].ssid, 934 il->scan_request->ssids[i].ssid_len); 935 n_probes++; 936 p++; 937 } 938 is_active = true; 939 } else 940 D_SCAN("Start passive scan.\n"); 941 942 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; 943 scan->tx_cmd.sta_id = il->hw_params.bcast_id; 944 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 945 946 switch (il->scan_band) { 947 case NL80211_BAND_2GHZ: 948 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; 949 chan_mod = 950 le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >> 951 RXON_FLG_CHANNEL_MODE_POS; 952 if (chan_mod == CHANNEL_MODE_PURE_40) { 953 rate = RATE_6M_PLCP; 954 } else { 955 rate = RATE_1M_PLCP; 956 rate_flags = RATE_MCS_CCK_MSK; 957 } 958 break; 959 case NL80211_BAND_5GHZ: 960 rate = RATE_6M_PLCP; 961 break; 962 default: 963 IL_WARN("Invalid scan band\n"); 964 return -EIO; 965 } 966 967 /* 968 * If active scanning is requested but a certain channel is 969 * marked passive, we can do active scanning if we detect 970 * transmissions. 971 * 972 * There is an issue with some firmware versions that triggers 973 * a sysassert on a "good CRC threshold" of zero (== disabled), 974 * on a radar channel even though this means that we should NOT 975 * send probes. 976 * 977 * The "good CRC threshold" is the number of frames that we 978 * need to receive during our dwell time on a channel before 979 * sending out probes -- setting this to a huge value will 980 * mean we never reach it, but at the same time work around 981 * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER 982 * here instead of IL_GOOD_CRC_TH_DISABLED. 983 */ 984 scan->good_CRC_th = 985 is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER; 986 987 band = il->scan_band; 988 989 if (il->cfg->scan_rx_antennas[band]) 990 rx_ant = il->cfg->scan_rx_antennas[band]; 991 992 il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas); 993 rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS; 994 scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags); 995 996 /* In power save mode use one chain, otherwise use all chains */ 997 if (test_bit(S_POWER_PMI, &il->status)) { 998 /* rx_ant has been set to all valid chains previously */ 999 active_chains = 1000 rx_ant & ((u8) (il->chain_noise_data.active_chains)); 1001 if (!active_chains) 1002 active_chains = rx_ant; 1003 1004 D_SCAN("chain_noise_data.active_chains: %u\n", 1005 il->chain_noise_data.active_chains); 1006 1007 rx_ant = il4965_first_antenna(active_chains); 1008 } 1009 1010 /* MIMO is not used here, but value is required */ 1011 rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; 1012 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; 1013 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; 1014 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; 1015 scan->rx_chain = cpu_to_le16(rx_chain); 1016 1017 cmd_len = 1018 il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data, 1019 vif->addr, il->scan_request->ie, 1020 il->scan_request->ie_len, 1021 IL_MAX_SCAN_SIZE - sizeof(*scan)); 1022 scan->tx_cmd.len = cpu_to_le16(cmd_len); 1023 1024 scan->filter_flags |= 1025 (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK); 1026 1027 scan->channel_count = 1028 il4965_get_channels_for_scan(il, vif, band, is_active, n_probes, 1029 (void *)&scan->data[cmd_len]); 1030 if (scan->channel_count == 0) { 1031 D_SCAN("channel count %d\n", scan->channel_count); 1032 return -EIO; 1033 } 1034 1035 cmd.len += 1036 le16_to_cpu(scan->tx_cmd.len) + 1037 scan->channel_count * sizeof(struct il_scan_channel); 1038 cmd.data = scan; 1039 scan->len = cpu_to_le16(cmd.len); 1040 1041 set_bit(S_SCAN_HW, &il->status); 1042 1043 ret = il_send_cmd_sync(il, &cmd); 1044 if (ret) 1045 clear_bit(S_SCAN_HW, &il->status); 1046 1047 return ret; 1048 } 1049 1050 int 1051 il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif, 1052 bool add) 1053 { 1054 struct il_vif_priv *vif_priv = (void *)vif->drv_priv; 1055 1056 if (add) 1057 return il4965_add_bssid_station(il, vif->bss_conf.bssid, 1058 &vif_priv->ibss_bssid_sta_id); 1059 return il_remove_station(il, vif_priv->ibss_bssid_sta_id, 1060 vif->bss_conf.bssid); 1061 } 1062 1063 void 1064 il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed) 1065 { 1066 lockdep_assert_held(&il->sta_lock); 1067 1068 if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed) 1069 il->stations[sta_id].tid[tid].tfds_in_queue -= freed; 1070 else { 1071 D_TX("free more than tfds_in_queue (%u:%d)\n", 1072 il->stations[sta_id].tid[tid].tfds_in_queue, freed); 1073 il->stations[sta_id].tid[tid].tfds_in_queue = 0; 1074 } 1075 } 1076 1077 #define IL_TX_QUEUE_MSK 0xfffff 1078 1079 static bool 1080 il4965_is_single_rx_stream(struct il_priv *il) 1081 { 1082 return il->current_ht_config.smps == IEEE80211_SMPS_STATIC || 1083 il->current_ht_config.single_chain_sufficient; 1084 } 1085 1086 #define IL_NUM_RX_CHAINS_MULTIPLE 3 1087 #define IL_NUM_RX_CHAINS_SINGLE 2 1088 #define IL_NUM_IDLE_CHAINS_DUAL 2 1089 #define IL_NUM_IDLE_CHAINS_SINGLE 1 1090 1091 /* 1092 * Determine how many receiver/antenna chains to use. 1093 * 1094 * More provides better reception via diversity. Fewer saves power 1095 * at the expense of throughput, but only when not in powersave to 1096 * start with. 1097 * 1098 * MIMO (dual stream) requires at least 2, but works better with 3. 1099 * This does not determine *which* chains to use, just how many. 1100 */ 1101 static int 1102 il4965_get_active_rx_chain_count(struct il_priv *il) 1103 { 1104 /* # of Rx chains to use when expecting MIMO. */ 1105 if (il4965_is_single_rx_stream(il)) 1106 return IL_NUM_RX_CHAINS_SINGLE; 1107 else 1108 return IL_NUM_RX_CHAINS_MULTIPLE; 1109 } 1110 1111 /* 1112 * When we are in power saving mode, unless device support spatial 1113 * multiplexing power save, use the active count for rx chain count. 1114 */ 1115 static int 1116 il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt) 1117 { 1118 /* # Rx chains when idling, depending on SMPS mode */ 1119 switch (il->current_ht_config.smps) { 1120 case IEEE80211_SMPS_STATIC: 1121 case IEEE80211_SMPS_DYNAMIC: 1122 return IL_NUM_IDLE_CHAINS_SINGLE; 1123 case IEEE80211_SMPS_OFF: 1124 return active_cnt; 1125 default: 1126 WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps); 1127 return active_cnt; 1128 } 1129 } 1130 1131 /* up to 4 chains */ 1132 static u8 1133 il4965_count_chain_bitmap(u32 chain_bitmap) 1134 { 1135 u8 res; 1136 res = (chain_bitmap & BIT(0)) >> 0; 1137 res += (chain_bitmap & BIT(1)) >> 1; 1138 res += (chain_bitmap & BIT(2)) >> 2; 1139 res += (chain_bitmap & BIT(3)) >> 3; 1140 return res; 1141 } 1142 1143 /** 1144 * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image 1145 * 1146 * Selects how many and which Rx receivers/antennas/chains to use. 1147 * This should not be used for scan command ... it puts data in wrong place. 1148 */ 1149 void 1150 il4965_set_rxon_chain(struct il_priv *il) 1151 { 1152 bool is_single = il4965_is_single_rx_stream(il); 1153 bool is_cam = !test_bit(S_POWER_PMI, &il->status); 1154 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt; 1155 u32 active_chains; 1156 u16 rx_chain; 1157 1158 /* Tell uCode which antennas are actually connected. 1159 * Before first association, we assume all antennas are connected. 1160 * Just after first association, il4965_chain_noise_calibration() 1161 * checks which antennas actually *are* connected. */ 1162 if (il->chain_noise_data.active_chains) 1163 active_chains = il->chain_noise_data.active_chains; 1164 else 1165 active_chains = il->hw_params.valid_rx_ant; 1166 1167 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS; 1168 1169 /* How many receivers should we use? */ 1170 active_rx_cnt = il4965_get_active_rx_chain_count(il); 1171 idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt); 1172 1173 /* correct rx chain count according hw settings 1174 * and chain noise calibration 1175 */ 1176 valid_rx_cnt = il4965_count_chain_bitmap(active_chains); 1177 if (valid_rx_cnt < active_rx_cnt) 1178 active_rx_cnt = valid_rx_cnt; 1179 1180 if (valid_rx_cnt < idle_rx_cnt) 1181 idle_rx_cnt = valid_rx_cnt; 1182 1183 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS; 1184 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS; 1185 1186 il->staging.rx_chain = cpu_to_le16(rx_chain); 1187 1188 if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam) 1189 il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK; 1190 else 1191 il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK; 1192 1193 D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain, 1194 active_rx_cnt, idle_rx_cnt); 1195 1196 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 || 1197 active_rx_cnt < idle_rx_cnt); 1198 } 1199 1200 static const char * 1201 il4965_get_fh_string(int cmd) 1202 { 1203 switch (cmd) { 1204 IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG); 1205 IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG); 1206 IL_CMD(FH49_RSCSR_CHNL0_WPTR); 1207 IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG); 1208 IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG); 1209 IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG); 1210 IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); 1211 IL_CMD(FH49_TSSR_TX_STATUS_REG); 1212 IL_CMD(FH49_TSSR_TX_ERROR_REG); 1213 default: 1214 return "UNKNOWN"; 1215 } 1216 } 1217 1218 int 1219 il4965_dump_fh(struct il_priv *il, char **buf, bool display) 1220 { 1221 int i; 1222 #ifdef CONFIG_IWLEGACY_DEBUG 1223 int pos = 0; 1224 size_t bufsz = 0; 1225 #endif 1226 static const u32 fh_tbl[] = { 1227 FH49_RSCSR_CHNL0_STTS_WPTR_REG, 1228 FH49_RSCSR_CHNL0_RBDCB_BASE_REG, 1229 FH49_RSCSR_CHNL0_WPTR, 1230 FH49_MEM_RCSR_CHNL0_CONFIG_REG, 1231 FH49_MEM_RSSR_SHARED_CTRL_REG, 1232 FH49_MEM_RSSR_RX_STATUS_REG, 1233 FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, 1234 FH49_TSSR_TX_STATUS_REG, 1235 FH49_TSSR_TX_ERROR_REG 1236 }; 1237 #ifdef CONFIG_IWLEGACY_DEBUG 1238 if (display) { 1239 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; 1240 *buf = kmalloc(bufsz, GFP_KERNEL); 1241 if (!*buf) 1242 return -ENOMEM; 1243 pos += 1244 scnprintf(*buf + pos, bufsz - pos, "FH register values:\n"); 1245 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 1246 pos += 1247 scnprintf(*buf + pos, bufsz - pos, 1248 " %34s: 0X%08x\n", 1249 il4965_get_fh_string(fh_tbl[i]), 1250 il_rd(il, fh_tbl[i])); 1251 } 1252 return pos; 1253 } 1254 #endif 1255 IL_ERR("FH register values:\n"); 1256 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 1257 IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]), 1258 il_rd(il, fh_tbl[i])); 1259 } 1260 return 0; 1261 } 1262 1263 static void 1264 il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb) 1265 { 1266 struct il_rx_pkt *pkt = rxb_addr(rxb); 1267 struct il_missed_beacon_notif *missed_beacon; 1268 1269 missed_beacon = &pkt->u.missed_beacon; 1270 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) > 1271 il->missed_beacon_threshold) { 1272 D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n", 1273 le32_to_cpu(missed_beacon->consecutive_missed_beacons), 1274 le32_to_cpu(missed_beacon->total_missed_becons), 1275 le32_to_cpu(missed_beacon->num_recvd_beacons), 1276 le32_to_cpu(missed_beacon->num_expected_beacons)); 1277 if (!test_bit(S_SCANNING, &il->status)) 1278 il4965_init_sensitivity(il); 1279 } 1280 } 1281 1282 /* Calculate noise level, based on measurements during network silence just 1283 * before arriving beacon. This measurement can be done only if we know 1284 * exactly when to expect beacons, therefore only when we're associated. */ 1285 static void 1286 il4965_rx_calc_noise(struct il_priv *il) 1287 { 1288 struct stats_rx_non_phy *rx_info; 1289 int num_active_rx = 0; 1290 int total_silence = 0; 1291 int bcn_silence_a, bcn_silence_b, bcn_silence_c; 1292 int last_rx_noise; 1293 1294 rx_info = &(il->_4965.stats.rx.general); 1295 bcn_silence_a = 1296 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; 1297 bcn_silence_b = 1298 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; 1299 bcn_silence_c = 1300 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; 1301 1302 if (bcn_silence_a) { 1303 total_silence += bcn_silence_a; 1304 num_active_rx++; 1305 } 1306 if (bcn_silence_b) { 1307 total_silence += bcn_silence_b; 1308 num_active_rx++; 1309 } 1310 if (bcn_silence_c) { 1311 total_silence += bcn_silence_c; 1312 num_active_rx++; 1313 } 1314 1315 /* Average among active antennas */ 1316 if (num_active_rx) 1317 last_rx_noise = (total_silence / num_active_rx) - 107; 1318 else 1319 last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE; 1320 1321 D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a, 1322 bcn_silence_b, bcn_silence_c, last_rx_noise); 1323 } 1324 1325 #ifdef CONFIG_IWLEGACY_DEBUGFS 1326 /* 1327 * based on the assumption of all stats counter are in DWORD 1328 * FIXME: This function is for debugging, do not deal with 1329 * the case of counters roll-over. 1330 */ 1331 static void 1332 il4965_accumulative_stats(struct il_priv *il, __le32 * stats) 1333 { 1334 int i, size; 1335 __le32 *prev_stats; 1336 u32 *accum_stats; 1337 u32 *delta, *max_delta; 1338 struct stats_general_common *general, *accum_general; 1339 struct stats_tx *tx, *accum_tx; 1340 1341 prev_stats = (__le32 *) &il->_4965.stats; 1342 accum_stats = (u32 *) &il->_4965.accum_stats; 1343 size = sizeof(struct il_notif_stats); 1344 general = &il->_4965.stats.general.common; 1345 accum_general = &il->_4965.accum_stats.general.common; 1346 tx = &il->_4965.stats.tx; 1347 accum_tx = &il->_4965.accum_stats.tx; 1348 delta = (u32 *) &il->_4965.delta_stats; 1349 max_delta = (u32 *) &il->_4965.max_delta; 1350 1351 for (i = sizeof(__le32); i < size; 1352 i += 1353 sizeof(__le32), stats++, prev_stats++, delta++, max_delta++, 1354 accum_stats++) { 1355 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) { 1356 *delta = 1357 (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats)); 1358 *accum_stats += *delta; 1359 if (*delta > *max_delta) 1360 *max_delta = *delta; 1361 } 1362 } 1363 1364 /* reset accumulative stats for "no-counter" type stats */ 1365 accum_general->temperature = general->temperature; 1366 accum_general->ttl_timestamp = general->ttl_timestamp; 1367 } 1368 #endif 1369 1370 static void 1371 il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb) 1372 { 1373 const int recalib_seconds = 60; 1374 bool change; 1375 struct il_rx_pkt *pkt = rxb_addr(rxb); 1376 1377 D_RX("Statistics notification received (%d vs %d).\n", 1378 (int)sizeof(struct il_notif_stats), 1379 le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK); 1380 1381 change = 1382 ((il->_4965.stats.general.common.temperature != 1383 pkt->u.stats.general.common.temperature) || 1384 ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) != 1385 (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK))); 1386 #ifdef CONFIG_IWLEGACY_DEBUGFS 1387 il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats); 1388 #endif 1389 1390 /* TODO: reading some of stats is unneeded */ 1391 memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats)); 1392 1393 set_bit(S_STATS, &il->status); 1394 1395 /* 1396 * Reschedule the stats timer to occur in recalib_seconds to ensure 1397 * we get a thermal update even if the uCode doesn't give us one 1398 */ 1399 mod_timer(&il->stats_periodic, 1400 jiffies + msecs_to_jiffies(recalib_seconds * 1000)); 1401 1402 if (unlikely(!test_bit(S_SCANNING, &il->status)) && 1403 (pkt->hdr.cmd == N_STATS)) { 1404 il4965_rx_calc_noise(il); 1405 queue_work(il->workqueue, &il->run_time_calib_work); 1406 } 1407 1408 if (change) 1409 il4965_temperature_calib(il); 1410 } 1411 1412 static void 1413 il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb) 1414 { 1415 struct il_rx_pkt *pkt = rxb_addr(rxb); 1416 1417 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) { 1418 #ifdef CONFIG_IWLEGACY_DEBUGFS 1419 memset(&il->_4965.accum_stats, 0, 1420 sizeof(struct il_notif_stats)); 1421 memset(&il->_4965.delta_stats, 0, 1422 sizeof(struct il_notif_stats)); 1423 memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats)); 1424 #endif 1425 D_RX("Statistics have been cleared\n"); 1426 } 1427 il4965_hdl_stats(il, rxb); 1428 } 1429 1430 1431 /* 1432 * mac80211 queues, ACs, hardware queues, FIFOs. 1433 * 1434 * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues 1435 * 1436 * Mac80211 uses the following numbers, which we get as from it 1437 * by way of skb_get_queue_mapping(skb): 1438 * 1439 * VO 0 1440 * VI 1 1441 * BE 2 1442 * BK 3 1443 * 1444 * 1445 * Regular (not A-MPDU) frames are put into hardware queues corresponding 1446 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their 1447 * own queue per aggregation session (RA/TID combination), such queues are 1448 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In 1449 * order to map frames to the right queue, we also need an AC->hw queue 1450 * mapping. This is implemented here. 1451 * 1452 * Due to the way hw queues are set up (by the hw specific modules like 1453 * 4965.c), the AC->hw queue mapping is the identity 1454 * mapping. 1455 */ 1456 1457 static const u8 tid_to_ac[] = { 1458 IEEE80211_AC_BE, 1459 IEEE80211_AC_BK, 1460 IEEE80211_AC_BK, 1461 IEEE80211_AC_BE, 1462 IEEE80211_AC_VI, 1463 IEEE80211_AC_VI, 1464 IEEE80211_AC_VO, 1465 IEEE80211_AC_VO 1466 }; 1467 1468 static inline int 1469 il4965_get_ac_from_tid(u16 tid) 1470 { 1471 if (likely(tid < ARRAY_SIZE(tid_to_ac))) 1472 return tid_to_ac[tid]; 1473 1474 /* no support for TIDs 8-15 yet */ 1475 return -EINVAL; 1476 } 1477 1478 static inline int 1479 il4965_get_fifo_from_tid(u16 tid) 1480 { 1481 const u8 ac_to_fifo[] = { 1482 IL_TX_FIFO_VO, 1483 IL_TX_FIFO_VI, 1484 IL_TX_FIFO_BE, 1485 IL_TX_FIFO_BK, 1486 }; 1487 1488 if (likely(tid < ARRAY_SIZE(tid_to_ac))) 1489 return ac_to_fifo[tid_to_ac[tid]]; 1490 1491 /* no support for TIDs 8-15 yet */ 1492 return -EINVAL; 1493 } 1494 1495 /* 1496 * handle build C_TX command notification. 1497 */ 1498 static void 1499 il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb, 1500 struct il_tx_cmd *tx_cmd, 1501 struct ieee80211_tx_info *info, 1502 struct ieee80211_hdr *hdr, u8 std_id) 1503 { 1504 __le16 fc = hdr->frame_control; 1505 __le32 tx_flags = tx_cmd->tx_flags; 1506 1507 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 1508 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { 1509 tx_flags |= TX_CMD_FLG_ACK_MSK; 1510 if (ieee80211_is_mgmt(fc)) 1511 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1512 if (ieee80211_is_probe_resp(fc) && 1513 !(le16_to_cpu(hdr->seq_ctrl) & 0xf)) 1514 tx_flags |= TX_CMD_FLG_TSF_MSK; 1515 } else { 1516 tx_flags &= (~TX_CMD_FLG_ACK_MSK); 1517 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1518 } 1519 1520 if (ieee80211_is_back_req(fc)) 1521 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; 1522 1523 tx_cmd->sta_id = std_id; 1524 if (ieee80211_has_morefrags(fc)) 1525 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; 1526 1527 if (ieee80211_is_data_qos(fc)) { 1528 u8 *qc = ieee80211_get_qos_ctl(hdr); 1529 tx_cmd->tid_tspec = qc[0] & 0xf; 1530 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 1531 } else { 1532 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 1533 } 1534 1535 il_tx_cmd_protection(il, info, fc, &tx_flags); 1536 1537 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); 1538 if (ieee80211_is_mgmt(fc)) { 1539 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 1540 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); 1541 else 1542 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); 1543 } else { 1544 tx_cmd->timeout.pm_frame_timeout = 0; 1545 } 1546 1547 tx_cmd->driver_txop = 0; 1548 tx_cmd->tx_flags = tx_flags; 1549 tx_cmd->next_frame_len = 0; 1550 } 1551 1552 static void 1553 il4965_tx_cmd_build_rate(struct il_priv *il, 1554 struct il_tx_cmd *tx_cmd, 1555 struct ieee80211_tx_info *info, 1556 struct ieee80211_sta *sta, 1557 __le16 fc) 1558 { 1559 const u8 rts_retry_limit = 60; 1560 u32 rate_flags; 1561 int rate_idx; 1562 u8 data_retry_limit; 1563 u8 rate_plcp; 1564 1565 /* Set retry limit on DATA packets and Probe Responses */ 1566 if (ieee80211_is_probe_resp(fc)) 1567 data_retry_limit = 3; 1568 else 1569 data_retry_limit = IL4965_DEFAULT_TX_RETRY; 1570 tx_cmd->data_retry_limit = data_retry_limit; 1571 /* Set retry limit on RTS packets */ 1572 tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit); 1573 1574 /* DATA packets will use the uCode station table for rate/antenna 1575 * selection */ 1576 if (ieee80211_is_data(fc)) { 1577 tx_cmd->initial_rate_idx = 0; 1578 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 1579 return; 1580 } 1581 1582 /** 1583 * If the current TX rate stored in mac80211 has the MCS bit set, it's 1584 * not really a TX rate. Thus, we use the lowest supported rate for 1585 * this band. Also use the lowest supported rate if the stored rate 1586 * idx is invalid. 1587 */ 1588 rate_idx = info->control.rates[0].idx; 1589 if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0 1590 || rate_idx > RATE_COUNT_LEGACY) 1591 rate_idx = rate_lowest_index(&il->bands[info->band], sta); 1592 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 1593 if (info->band == NL80211_BAND_5GHZ) 1594 rate_idx += IL_FIRST_OFDM_RATE; 1595 /* Get PLCP rate for tx_cmd->rate_n_flags */ 1596 rate_plcp = il_rates[rate_idx].plcp; 1597 /* Zero out flags for this packet */ 1598 rate_flags = 0; 1599 1600 /* Set CCK flag as needed */ 1601 if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE) 1602 rate_flags |= RATE_MCS_CCK_MSK; 1603 1604 /* Set up antennas */ 1605 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); 1606 rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; 1607 1608 /* Set the rate in the TX cmd */ 1609 tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags); 1610 } 1611 1612 static void 1613 il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info, 1614 struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag, 1615 int sta_id) 1616 { 1617 struct ieee80211_key_conf *keyconf = info->control.hw_key; 1618 1619 switch (keyconf->cipher) { 1620 case WLAN_CIPHER_SUITE_CCMP: 1621 tx_cmd->sec_ctl = TX_CMD_SEC_CCM; 1622 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); 1623 if (info->flags & IEEE80211_TX_CTL_AMPDU) 1624 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; 1625 D_TX("tx_cmd with AES hwcrypto\n"); 1626 break; 1627 1628 case WLAN_CIPHER_SUITE_TKIP: 1629 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 1630 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 1631 D_TX("tx_cmd with tkip hwcrypto\n"); 1632 break; 1633 1634 case WLAN_CIPHER_SUITE_WEP104: 1635 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 1636 /* fall through */ 1637 case WLAN_CIPHER_SUITE_WEP40: 1638 tx_cmd->sec_ctl |= 1639 (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) << 1640 TX_CMD_SEC_SHIFT); 1641 1642 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 1643 1644 D_TX("Configuring packet for WEP encryption " "with key %d\n", 1645 keyconf->keyidx); 1646 break; 1647 1648 default: 1649 IL_ERR("Unknown encode cipher %x\n", keyconf->cipher); 1650 break; 1651 } 1652 } 1653 1654 /* 1655 * start C_TX command process 1656 */ 1657 int 1658 il4965_tx_skb(struct il_priv *il, 1659 struct ieee80211_sta *sta, 1660 struct sk_buff *skb) 1661 { 1662 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1664 struct il_station_priv *sta_priv = NULL; 1665 struct il_tx_queue *txq; 1666 struct il_queue *q; 1667 struct il_device_cmd *out_cmd; 1668 struct il_cmd_meta *out_meta; 1669 struct il_tx_cmd *tx_cmd; 1670 int txq_id; 1671 dma_addr_t phys_addr; 1672 dma_addr_t txcmd_phys; 1673 dma_addr_t scratch_phys; 1674 u16 len, firstlen, secondlen; 1675 u16 seq_number = 0; 1676 __le16 fc; 1677 u8 hdr_len; 1678 u8 sta_id; 1679 u8 wait_write_ptr = 0; 1680 u8 tid = 0; 1681 u8 *qc = NULL; 1682 unsigned long flags; 1683 bool is_agg = false; 1684 1685 spin_lock_irqsave(&il->lock, flags); 1686 if (il_is_rfkill(il)) { 1687 D_DROP("Dropping - RF KILL\n"); 1688 goto drop_unlock; 1689 } 1690 1691 fc = hdr->frame_control; 1692 1693 #ifdef CONFIG_IWLEGACY_DEBUG 1694 if (ieee80211_is_auth(fc)) 1695 D_TX("Sending AUTH frame\n"); 1696 else if (ieee80211_is_assoc_req(fc)) 1697 D_TX("Sending ASSOC frame\n"); 1698 else if (ieee80211_is_reassoc_req(fc)) 1699 D_TX("Sending REASSOC frame\n"); 1700 #endif 1701 1702 hdr_len = ieee80211_hdrlen(fc); 1703 1704 /* For management frames use broadcast id to do not break aggregation */ 1705 if (!ieee80211_is_data(fc)) 1706 sta_id = il->hw_params.bcast_id; 1707 else { 1708 /* Find idx into station table for destination station */ 1709 sta_id = il_sta_id_or_broadcast(il, sta); 1710 1711 if (sta_id == IL_INVALID_STATION) { 1712 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1); 1713 goto drop_unlock; 1714 } 1715 } 1716 1717 D_TX("station Id %d\n", sta_id); 1718 1719 if (sta) 1720 sta_priv = (void *)sta->drv_priv; 1721 1722 if (sta_priv && sta_priv->asleep && 1723 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { 1724 /* 1725 * This sends an asynchronous command to the device, 1726 * but we can rely on it being processed before the 1727 * next frame is processed -- and the next frame to 1728 * this station is the one that will consume this 1729 * counter. 1730 * For now set the counter to just 1 since we do not 1731 * support uAPSD yet. 1732 */ 1733 il4965_sta_modify_sleep_tx_count(il, sta_id, 1); 1734 } 1735 1736 /* FIXME: remove me ? */ 1737 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1738 1739 /* Access category (AC) is also the queue number */ 1740 txq_id = skb_get_queue_mapping(skb); 1741 1742 /* irqs already disabled/saved above when locking il->lock */ 1743 spin_lock(&il->sta_lock); 1744 1745 if (ieee80211_is_data_qos(fc)) { 1746 qc = ieee80211_get_qos_ctl(hdr); 1747 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 1748 if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) { 1749 spin_unlock(&il->sta_lock); 1750 goto drop_unlock; 1751 } 1752 seq_number = il->stations[sta_id].tid[tid].seq_number; 1753 seq_number &= IEEE80211_SCTL_SEQ; 1754 hdr->seq_ctrl = 1755 hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG); 1756 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1757 seq_number += 0x10; 1758 /* aggregation is on for this <sta,tid> */ 1759 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1760 il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) { 1761 txq_id = il->stations[sta_id].tid[tid].agg.txq_id; 1762 is_agg = true; 1763 } 1764 } 1765 1766 txq = &il->txq[txq_id]; 1767 q = &txq->q; 1768 1769 if (unlikely(il_queue_space(q) < q->high_mark)) { 1770 spin_unlock(&il->sta_lock); 1771 goto drop_unlock; 1772 } 1773 1774 if (ieee80211_is_data_qos(fc)) { 1775 il->stations[sta_id].tid[tid].tfds_in_queue++; 1776 if (!ieee80211_has_morefrags(fc)) 1777 il->stations[sta_id].tid[tid].seq_number = seq_number; 1778 } 1779 1780 spin_unlock(&il->sta_lock); 1781 1782 txq->skbs[q->write_ptr] = skb; 1783 1784 /* Set up first empty entry in queue's array of Tx/cmd buffers */ 1785 out_cmd = txq->cmd[q->write_ptr]; 1786 out_meta = &txq->meta[q->write_ptr]; 1787 tx_cmd = &out_cmd->cmd.tx; 1788 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); 1789 memset(tx_cmd, 0, sizeof(struct il_tx_cmd)); 1790 1791 /* 1792 * Set up the Tx-command (not MAC!) header. 1793 * Store the chosen Tx queue and TFD idx within the sequence field; 1794 * after Tx, uCode's Tx response will return this value so driver can 1795 * locate the frame within the tx queue and do post-tx processing. 1796 */ 1797 out_cmd->hdr.cmd = C_TX; 1798 out_cmd->hdr.sequence = 1799 cpu_to_le16((u16) 1800 (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr))); 1801 1802 /* Copy MAC header from skb into command buffer */ 1803 memcpy(tx_cmd->hdr, hdr, hdr_len); 1804 1805 /* Total # bytes to be transmitted */ 1806 tx_cmd->len = cpu_to_le16((u16) skb->len); 1807 1808 if (info->control.hw_key) 1809 il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id); 1810 1811 /* TODO need this for burst mode later on */ 1812 il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id); 1813 1814 il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc); 1815 1816 /* 1817 * Use the first empty entry in this queue's command buffer array 1818 * to contain the Tx command and MAC header concatenated together 1819 * (payload data will be in another buffer). 1820 * Size of this varies, due to varying MAC header length. 1821 * If end is not dword aligned, we'll have 2 extra bytes at the end 1822 * of the MAC header (device reads on dword boundaries). 1823 * We'll tell device about this padding later. 1824 */ 1825 len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len; 1826 firstlen = (len + 3) & ~3; 1827 1828 /* Tell NIC about any 2-byte padding after MAC header */ 1829 if (firstlen != len) 1830 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; 1831 1832 /* Physical address of this Tx command's header (not MAC header!), 1833 * within command buffer array. */ 1834 txcmd_phys = 1835 pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen, 1836 PCI_DMA_BIDIRECTIONAL); 1837 if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys))) 1838 goto drop_unlock; 1839 1840 /* Set up TFD's 2nd entry to point directly to remainder of skb, 1841 * if any (802.11 null frames have no payload). */ 1842 secondlen = skb->len - hdr_len; 1843 if (secondlen > 0) { 1844 phys_addr = 1845 pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen, 1846 PCI_DMA_TODEVICE); 1847 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) 1848 goto drop_unlock; 1849 } 1850 1851 /* Add buffer containing Tx command and MAC(!) header to TFD's 1852 * first entry */ 1853 il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0); 1854 dma_unmap_addr_set(out_meta, mapping, txcmd_phys); 1855 dma_unmap_len_set(out_meta, len, firstlen); 1856 if (secondlen) 1857 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 1858 0, 0); 1859 1860 if (!ieee80211_has_morefrags(hdr->frame_control)) { 1861 txq->need_update = 1; 1862 } else { 1863 wait_write_ptr = 1; 1864 txq->need_update = 0; 1865 } 1866 1867 scratch_phys = 1868 txcmd_phys + sizeof(struct il_cmd_header) + 1869 offsetof(struct il_tx_cmd, scratch); 1870 1871 /* take back ownership of DMA buffer to enable update */ 1872 pci_dma_sync_single_for_cpu(il->pci_dev, txcmd_phys, firstlen, 1873 PCI_DMA_BIDIRECTIONAL); 1874 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); 1875 tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys); 1876 1877 il_update_stats(il, true, fc, skb->len); 1878 1879 D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence)); 1880 D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); 1881 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd)); 1882 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len); 1883 1884 /* Set up entry for this TFD in Tx byte-count array */ 1885 if (info->flags & IEEE80211_TX_CTL_AMPDU) 1886 il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len)); 1887 1888 pci_dma_sync_single_for_device(il->pci_dev, txcmd_phys, firstlen, 1889 PCI_DMA_BIDIRECTIONAL); 1890 1891 /* Tell device the write idx *just past* this latest filled TFD */ 1892 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd); 1893 il_txq_update_write_ptr(il, txq); 1894 spin_unlock_irqrestore(&il->lock, flags); 1895 1896 /* 1897 * At this point the frame is "transmitted" successfully 1898 * and we will get a TX status notification eventually, 1899 * regardless of the value of ret. "ret" only indicates 1900 * whether or not we should update the write pointer. 1901 */ 1902 1903 /* 1904 * Avoid atomic ops if it isn't an associated client. 1905 * Also, if this is a packet for aggregation, don't 1906 * increase the counter because the ucode will stop 1907 * aggregation queues when their respective station 1908 * goes to sleep. 1909 */ 1910 if (sta_priv && sta_priv->client && !is_agg) 1911 atomic_inc(&sta_priv->pending_frames); 1912 1913 if (il_queue_space(q) < q->high_mark && il->mac80211_registered) { 1914 if (wait_write_ptr) { 1915 spin_lock_irqsave(&il->lock, flags); 1916 txq->need_update = 1; 1917 il_txq_update_write_ptr(il, txq); 1918 spin_unlock_irqrestore(&il->lock, flags); 1919 } else { 1920 il_stop_queue(il, txq); 1921 } 1922 } 1923 1924 return 0; 1925 1926 drop_unlock: 1927 spin_unlock_irqrestore(&il->lock, flags); 1928 return -1; 1929 } 1930 1931 static inline int 1932 il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size) 1933 { 1934 ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma, 1935 GFP_KERNEL); 1936 if (!ptr->addr) 1937 return -ENOMEM; 1938 ptr->size = size; 1939 return 0; 1940 } 1941 1942 static inline void 1943 il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr) 1944 { 1945 if (unlikely(!ptr->addr)) 1946 return; 1947 1948 dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma); 1949 memset(ptr, 0, sizeof(*ptr)); 1950 } 1951 1952 /** 1953 * il4965_hw_txq_ctx_free - Free TXQ Context 1954 * 1955 * Destroy all TX DMA queues and structures 1956 */ 1957 void 1958 il4965_hw_txq_ctx_free(struct il_priv *il) 1959 { 1960 int txq_id; 1961 1962 /* Tx queues */ 1963 if (il->txq) { 1964 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 1965 if (txq_id == il->cmd_queue) 1966 il_cmd_queue_free(il); 1967 else 1968 il_tx_queue_free(il, txq_id); 1969 } 1970 il4965_free_dma_ptr(il, &il->kw); 1971 1972 il4965_free_dma_ptr(il, &il->scd_bc_tbls); 1973 1974 /* free tx queue structure */ 1975 il_free_txq_mem(il); 1976 } 1977 1978 /** 1979 * il4965_txq_ctx_alloc - allocate TX queue context 1980 * Allocate all Tx DMA structures and initialize them 1981 * 1982 * @param il 1983 * @return error code 1984 */ 1985 int 1986 il4965_txq_ctx_alloc(struct il_priv *il) 1987 { 1988 int ret, txq_id; 1989 unsigned long flags; 1990 1991 /* Free all tx/cmd queues and keep-warm buffer */ 1992 il4965_hw_txq_ctx_free(il); 1993 1994 ret = 1995 il4965_alloc_dma_ptr(il, &il->scd_bc_tbls, 1996 il->hw_params.scd_bc_tbls_size); 1997 if (ret) { 1998 IL_ERR("Scheduler BC Table allocation failed\n"); 1999 goto error_bc_tbls; 2000 } 2001 /* Alloc keep-warm buffer */ 2002 ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE); 2003 if (ret) { 2004 IL_ERR("Keep Warm allocation failed\n"); 2005 goto error_kw; 2006 } 2007 2008 /* allocate tx queue structure */ 2009 ret = il_alloc_txq_mem(il); 2010 if (ret) 2011 goto error; 2012 2013 spin_lock_irqsave(&il->lock, flags); 2014 2015 /* Turn off all Tx DMA fifos */ 2016 il4965_txq_set_sched(il, 0); 2017 2018 /* Tell NIC where to find the "keep warm" buffer */ 2019 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); 2020 2021 spin_unlock_irqrestore(&il->lock, flags); 2022 2023 /* Alloc and init all Tx queues, including the command queue (#4/#9) */ 2024 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) { 2025 ret = il_tx_queue_init(il, txq_id); 2026 if (ret) { 2027 IL_ERR("Tx %d queue init failed\n", txq_id); 2028 goto error; 2029 } 2030 } 2031 2032 return ret; 2033 2034 error: 2035 il4965_hw_txq_ctx_free(il); 2036 il4965_free_dma_ptr(il, &il->kw); 2037 error_kw: 2038 il4965_free_dma_ptr(il, &il->scd_bc_tbls); 2039 error_bc_tbls: 2040 return ret; 2041 } 2042 2043 void 2044 il4965_txq_ctx_reset(struct il_priv *il) 2045 { 2046 int txq_id; 2047 unsigned long flags; 2048 2049 spin_lock_irqsave(&il->lock, flags); 2050 2051 /* Turn off all Tx DMA fifos */ 2052 il4965_txq_set_sched(il, 0); 2053 /* Tell NIC where to find the "keep warm" buffer */ 2054 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4); 2055 2056 spin_unlock_irqrestore(&il->lock, flags); 2057 2058 /* Alloc and init all Tx queues, including the command queue (#4) */ 2059 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2060 il_tx_queue_reset(il, txq_id); 2061 } 2062 2063 static void 2064 il4965_txq_ctx_unmap(struct il_priv *il) 2065 { 2066 int txq_id; 2067 2068 if (!il->txq) 2069 return; 2070 2071 /* Unmap DMA from host system and free skb's */ 2072 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2073 if (txq_id == il->cmd_queue) 2074 il_cmd_queue_unmap(il); 2075 else 2076 il_tx_queue_unmap(il, txq_id); 2077 } 2078 2079 /** 2080 * il4965_txq_ctx_stop - Stop all Tx DMA channels 2081 */ 2082 void 2083 il4965_txq_ctx_stop(struct il_priv *il) 2084 { 2085 int ch, ret; 2086 2087 _il_wr_prph(il, IL49_SCD_TXFACT, 0); 2088 2089 /* Stop each Tx DMA channel, and wait for it to be idle */ 2090 for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) { 2091 _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); 2092 ret = 2093 _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG, 2094 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 2095 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 2096 1000); 2097 if (ret < 0) 2098 IL_ERR("Timeout stopping DMA channel %d [0x%08x]", 2099 ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG)); 2100 } 2101 } 2102 2103 /* 2104 * Find first available (lowest unused) Tx Queue, mark it "active". 2105 * Called only when finding queue for aggregation. 2106 * Should never return anything < 7, because they should already 2107 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6) 2108 */ 2109 static int 2110 il4965_txq_ctx_activate_free(struct il_priv *il) 2111 { 2112 int txq_id; 2113 2114 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) 2115 if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk)) 2116 return txq_id; 2117 return -1; 2118 } 2119 2120 /** 2121 * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration 2122 */ 2123 static void 2124 il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id) 2125 { 2126 /* Simply stop the queue, but don't change any configuration; 2127 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */ 2128 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), 2129 (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | 2130 (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); 2131 } 2132 2133 /** 2134 * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue 2135 */ 2136 static int 2137 il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id) 2138 { 2139 u32 tbl_dw_addr; 2140 u32 tbl_dw; 2141 u16 scd_q2ratid; 2142 2143 scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK; 2144 2145 tbl_dw_addr = 2146 il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id); 2147 2148 tbl_dw = il_read_targ_mem(il, tbl_dw_addr); 2149 2150 if (txq_id & 0x1) 2151 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); 2152 else 2153 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); 2154 2155 il_write_targ_mem(il, tbl_dw_addr, tbl_dw); 2156 2157 return 0; 2158 } 2159 2160 /** 2161 * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue 2162 * 2163 * NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE, 2164 * i.e. it must be one of the higher queues used for aggregation 2165 */ 2166 static int 2167 il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id, 2168 int tid, u16 ssn_idx) 2169 { 2170 unsigned long flags; 2171 u16 ra_tid; 2172 int ret; 2173 2174 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || 2175 (IL49_FIRST_AMPDU_QUEUE + 2176 il->cfg->num_of_ampdu_queues <= txq_id)) { 2177 IL_WARN("queue number out of range: %d, must be %d to %d\n", 2178 txq_id, IL49_FIRST_AMPDU_QUEUE, 2179 IL49_FIRST_AMPDU_QUEUE + 2180 il->cfg->num_of_ampdu_queues - 1); 2181 return -EINVAL; 2182 } 2183 2184 ra_tid = BUILD_RAxTID(sta_id, tid); 2185 2186 /* Modify device's station table to Tx this TID */ 2187 ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid); 2188 if (ret) 2189 return ret; 2190 2191 spin_lock_irqsave(&il->lock, flags); 2192 2193 /* Stop this Tx queue before configuring it */ 2194 il4965_tx_queue_stop_scheduler(il, txq_id); 2195 2196 /* Map receiver-address / traffic-ID to this queue */ 2197 il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id); 2198 2199 /* Set this queue as a chain-building queue */ 2200 il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); 2201 2202 /* Place first TFD at idx corresponding to start sequence number. 2203 * Assumes that ssn_idx is valid (!= 0xFFF) */ 2204 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); 2205 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); 2206 il4965_set_wr_ptrs(il, txq_id, ssn_idx); 2207 2208 /* Set up Tx win size and frame limit for this queue */ 2209 il_write_targ_mem(il, 2210 il->scd_base_addr + 2211 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id), 2212 (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) 2213 & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); 2214 2215 il_write_targ_mem(il, 2216 il->scd_base_addr + 2217 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), 2218 (SCD_FRAME_LIMIT << 2219 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & 2220 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); 2221 2222 il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); 2223 2224 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */ 2225 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1); 2226 2227 spin_unlock_irqrestore(&il->lock, flags); 2228 2229 return 0; 2230 } 2231 2232 int 2233 il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif, 2234 struct ieee80211_sta *sta, u16 tid, u16 * ssn) 2235 { 2236 int sta_id; 2237 int tx_fifo; 2238 int txq_id; 2239 int ret; 2240 unsigned long flags; 2241 struct il_tid_data *tid_data; 2242 2243 /* FIXME: warning if tx fifo not found ? */ 2244 tx_fifo = il4965_get_fifo_from_tid(tid); 2245 if (unlikely(tx_fifo < 0)) 2246 return tx_fifo; 2247 2248 D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid); 2249 2250 sta_id = il_sta_id(sta); 2251 if (sta_id == IL_INVALID_STATION) { 2252 IL_ERR("Start AGG on invalid station\n"); 2253 return -ENXIO; 2254 } 2255 if (unlikely(tid >= MAX_TID_COUNT)) 2256 return -EINVAL; 2257 2258 if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) { 2259 IL_ERR("Start AGG when state is not IL_AGG_OFF !\n"); 2260 return -ENXIO; 2261 } 2262 2263 txq_id = il4965_txq_ctx_activate_free(il); 2264 if (txq_id == -1) { 2265 IL_ERR("No free aggregation queue available\n"); 2266 return -ENXIO; 2267 } 2268 2269 spin_lock_irqsave(&il->sta_lock, flags); 2270 tid_data = &il->stations[sta_id].tid[tid]; 2271 *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2272 tid_data->agg.txq_id = txq_id; 2273 il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id); 2274 spin_unlock_irqrestore(&il->sta_lock, flags); 2275 2276 ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn); 2277 if (ret) 2278 return ret; 2279 2280 spin_lock_irqsave(&il->sta_lock, flags); 2281 tid_data = &il->stations[sta_id].tid[tid]; 2282 if (tid_data->tfds_in_queue == 0) { 2283 D_HT("HW queue is empty\n"); 2284 tid_data->agg.state = IL_AGG_ON; 2285 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2286 } else { 2287 D_HT("HW queue is NOT empty: %d packets in HW queue\n", 2288 tid_data->tfds_in_queue); 2289 tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA; 2290 } 2291 spin_unlock_irqrestore(&il->sta_lock, flags); 2292 return ret; 2293 } 2294 2295 /** 2296 * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE 2297 * il->lock must be held by the caller 2298 */ 2299 static int 2300 il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo) 2301 { 2302 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) || 2303 (IL49_FIRST_AMPDU_QUEUE + 2304 il->cfg->num_of_ampdu_queues <= txq_id)) { 2305 IL_WARN("queue number out of range: %d, must be %d to %d\n", 2306 txq_id, IL49_FIRST_AMPDU_QUEUE, 2307 IL49_FIRST_AMPDU_QUEUE + 2308 il->cfg->num_of_ampdu_queues - 1); 2309 return -EINVAL; 2310 } 2311 2312 il4965_tx_queue_stop_scheduler(il, txq_id); 2313 2314 il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id)); 2315 2316 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff); 2317 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff); 2318 /* supposes that ssn_idx is valid (!= 0xFFF) */ 2319 il4965_set_wr_ptrs(il, txq_id, ssn_idx); 2320 2321 il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id)); 2322 il_txq_ctx_deactivate(il, txq_id); 2323 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0); 2324 2325 return 0; 2326 } 2327 2328 int 2329 il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif, 2330 struct ieee80211_sta *sta, u16 tid) 2331 { 2332 int tx_fifo_id, txq_id, sta_id, ssn; 2333 struct il_tid_data *tid_data; 2334 int write_ptr, read_ptr; 2335 unsigned long flags; 2336 2337 /* FIXME: warning if tx_fifo_id not found ? */ 2338 tx_fifo_id = il4965_get_fifo_from_tid(tid); 2339 if (unlikely(tx_fifo_id < 0)) 2340 return tx_fifo_id; 2341 2342 sta_id = il_sta_id(sta); 2343 2344 if (sta_id == IL_INVALID_STATION) { 2345 IL_ERR("Invalid station for AGG tid %d\n", tid); 2346 return -ENXIO; 2347 } 2348 2349 spin_lock_irqsave(&il->sta_lock, flags); 2350 2351 tid_data = &il->stations[sta_id].tid[tid]; 2352 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; 2353 txq_id = tid_data->agg.txq_id; 2354 2355 switch (il->stations[sta_id].tid[tid].agg.state) { 2356 case IL_EMPTYING_HW_QUEUE_ADDBA: 2357 /* 2358 * This can happen if the peer stops aggregation 2359 * again before we've had a chance to drain the 2360 * queue we selected previously, i.e. before the 2361 * session was really started completely. 2362 */ 2363 D_HT("AGG stop before setup done\n"); 2364 goto turn_off; 2365 case IL_AGG_ON: 2366 break; 2367 default: 2368 IL_WARN("Stopping AGG while state not ON or starting\n"); 2369 } 2370 2371 write_ptr = il->txq[txq_id].q.write_ptr; 2372 read_ptr = il->txq[txq_id].q.read_ptr; 2373 2374 /* The queue is not empty */ 2375 if (write_ptr != read_ptr) { 2376 D_HT("Stopping a non empty AGG HW QUEUE\n"); 2377 il->stations[sta_id].tid[tid].agg.state = 2378 IL_EMPTYING_HW_QUEUE_DELBA; 2379 spin_unlock_irqrestore(&il->sta_lock, flags); 2380 return 0; 2381 } 2382 2383 D_HT("HW queue is empty\n"); 2384 turn_off: 2385 il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF; 2386 2387 /* do not restore/save irqs */ 2388 spin_unlock(&il->sta_lock); 2389 spin_lock(&il->lock); 2390 2391 /* 2392 * the only reason this call can fail is queue number out of range, 2393 * which can happen if uCode is reloaded and all the station 2394 * information are lost. if it is outside the range, there is no need 2395 * to deactivate the uCode queue, just return "success" to allow 2396 * mac80211 to clean up it own data. 2397 */ 2398 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id); 2399 spin_unlock_irqrestore(&il->lock, flags); 2400 2401 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 2402 2403 return 0; 2404 } 2405 2406 int 2407 il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id) 2408 { 2409 struct il_queue *q = &il->txq[txq_id].q; 2410 u8 *addr = il->stations[sta_id].sta.sta.addr; 2411 struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid]; 2412 2413 lockdep_assert_held(&il->sta_lock); 2414 2415 switch (il->stations[sta_id].tid[tid].agg.state) { 2416 case IL_EMPTYING_HW_QUEUE_DELBA: 2417 /* We are reclaiming the last packet of the */ 2418 /* aggregated HW queue */ 2419 if (txq_id == tid_data->agg.txq_id && 2420 q->read_ptr == q->write_ptr) { 2421 u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 2422 int tx_fifo = il4965_get_fifo_from_tid(tid); 2423 D_HT("HW queue empty: continue DELBA flow\n"); 2424 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo); 2425 tid_data->agg.state = IL_AGG_OFF; 2426 ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid); 2427 } 2428 break; 2429 case IL_EMPTYING_HW_QUEUE_ADDBA: 2430 /* We are reclaiming the last packet of the queue */ 2431 if (tid_data->tfds_in_queue == 0) { 2432 D_HT("HW queue empty: continue ADDBA flow\n"); 2433 tid_data->agg.state = IL_AGG_ON; 2434 ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid); 2435 } 2436 break; 2437 } 2438 2439 return 0; 2440 } 2441 2442 static void 2443 il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1) 2444 { 2445 struct ieee80211_sta *sta; 2446 struct il_station_priv *sta_priv; 2447 2448 rcu_read_lock(); 2449 sta = ieee80211_find_sta(il->vif, addr1); 2450 if (sta) { 2451 sta_priv = (void *)sta->drv_priv; 2452 /* avoid atomic ops if this isn't a client */ 2453 if (sta_priv->client && 2454 atomic_dec_return(&sta_priv->pending_frames) == 0) 2455 ieee80211_sta_block_awake(il->hw, sta, false); 2456 } 2457 rcu_read_unlock(); 2458 } 2459 2460 static void 2461 il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg) 2462 { 2463 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 2464 2465 if (!is_agg) 2466 il4965_non_agg_tx_status(il, hdr->addr1); 2467 2468 ieee80211_tx_status_irqsafe(il->hw, skb); 2469 } 2470 2471 int 2472 il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx) 2473 { 2474 struct il_tx_queue *txq = &il->txq[txq_id]; 2475 struct il_queue *q = &txq->q; 2476 int nfreed = 0; 2477 struct ieee80211_hdr *hdr; 2478 struct sk_buff *skb; 2479 2480 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) { 2481 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, " 2482 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd, 2483 q->write_ptr, q->read_ptr); 2484 return 0; 2485 } 2486 2487 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx; 2488 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) { 2489 2490 skb = txq->skbs[txq->q.read_ptr]; 2491 2492 if (WARN_ON_ONCE(skb == NULL)) 2493 continue; 2494 2495 hdr = (struct ieee80211_hdr *) skb->data; 2496 if (ieee80211_is_data_qos(hdr->frame_control)) 2497 nfreed++; 2498 2499 il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE); 2500 2501 txq->skbs[txq->q.read_ptr] = NULL; 2502 il->ops->txq_free_tfd(il, txq); 2503 } 2504 return nfreed; 2505 } 2506 2507 /** 2508 * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack 2509 * 2510 * Go through block-ack's bitmap of ACK'd frames, update driver's record of 2511 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo. 2512 */ 2513 static int 2514 il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg, 2515 struct il_compressed_ba_resp *ba_resp) 2516 { 2517 int i, sh, ack; 2518 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl); 2519 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 2520 int successes = 0; 2521 struct ieee80211_tx_info *info; 2522 u64 bitmap, sent_bitmap; 2523 2524 if (unlikely(!agg->wait_for_ba)) { 2525 if (unlikely(ba_resp->bitmap)) 2526 IL_ERR("Received BA when not expected\n"); 2527 return -EINVAL; 2528 } 2529 2530 /* Mark that the expected block-ack response arrived */ 2531 agg->wait_for_ba = 0; 2532 D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl); 2533 2534 /* Calculate shift to align block-ack bits with our Tx win bits */ 2535 sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4); 2536 if (sh < 0) /* tbw something is wrong with indices */ 2537 sh += 0x100; 2538 2539 if (agg->frame_count > (64 - sh)) { 2540 D_TX_REPLY("more frames than bitmap size"); 2541 return -1; 2542 } 2543 2544 /* don't use 64-bit values for now */ 2545 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh; 2546 2547 /* check for success or failure according to the 2548 * transmitted bitmap and block-ack bitmap */ 2549 sent_bitmap = bitmap & agg->bitmap; 2550 2551 /* For each frame attempted in aggregation, 2552 * update driver's record of tx frame's status. */ 2553 i = 0; 2554 while (sent_bitmap) { 2555 ack = sent_bitmap & 1ULL; 2556 successes += ack; 2557 D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK", 2558 i, (agg->start_idx + i) & 0xff, agg->start_idx + i); 2559 sent_bitmap >>= 1; 2560 ++i; 2561 } 2562 2563 D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap); 2564 2565 info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]); 2566 memset(&info->status, 0, sizeof(info->status)); 2567 info->flags |= IEEE80211_TX_STAT_ACK; 2568 info->flags |= IEEE80211_TX_STAT_AMPDU; 2569 info->status.ampdu_ack_len = successes; 2570 info->status.ampdu_len = agg->frame_count; 2571 il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info); 2572 2573 return 0; 2574 } 2575 2576 static inline bool 2577 il4965_is_tx_success(u32 status) 2578 { 2579 status &= TX_STATUS_MSK; 2580 return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE); 2581 } 2582 2583 static u8 2584 il4965_find_station(struct il_priv *il, const u8 *addr) 2585 { 2586 int i; 2587 int start = 0; 2588 int ret = IL_INVALID_STATION; 2589 unsigned long flags; 2590 2591 if (il->iw_mode == NL80211_IFTYPE_ADHOC) 2592 start = IL_STA_ID; 2593 2594 if (is_broadcast_ether_addr(addr)) 2595 return il->hw_params.bcast_id; 2596 2597 spin_lock_irqsave(&il->sta_lock, flags); 2598 for (i = start; i < il->hw_params.max_stations; i++) 2599 if (il->stations[i].used && 2600 ether_addr_equal(il->stations[i].sta.sta.addr, addr)) { 2601 ret = i; 2602 goto out; 2603 } 2604 2605 D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations); 2606 2607 out: 2608 /* 2609 * It may be possible that more commands interacting with stations 2610 * arrive before we completed processing the adding of 2611 * station 2612 */ 2613 if (ret != IL_INVALID_STATION && 2614 (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) || 2615 ((il->stations[ret].used & IL_STA_UCODE_ACTIVE) && 2616 (il->stations[ret].used & IL_STA_UCODE_INPROGRESS)))) { 2617 IL_ERR("Requested station info for sta %d before ready.\n", 2618 ret); 2619 ret = IL_INVALID_STATION; 2620 } 2621 spin_unlock_irqrestore(&il->sta_lock, flags); 2622 return ret; 2623 } 2624 2625 static int 2626 il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr) 2627 { 2628 if (il->iw_mode == NL80211_IFTYPE_STATION) 2629 return IL_AP_ID; 2630 else { 2631 u8 *da = ieee80211_get_DA(hdr); 2632 2633 return il4965_find_station(il, da); 2634 } 2635 } 2636 2637 static inline u32 2638 il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp) 2639 { 2640 return le32_to_cpup(&tx_resp->u.status + 2641 tx_resp->frame_count) & IEEE80211_MAX_SN; 2642 } 2643 2644 static inline u32 2645 il4965_tx_status_to_mac80211(u32 status) 2646 { 2647 status &= TX_STATUS_MSK; 2648 2649 switch (status) { 2650 case TX_STATUS_SUCCESS: 2651 case TX_STATUS_DIRECT_DONE: 2652 return IEEE80211_TX_STAT_ACK; 2653 case TX_STATUS_FAIL_DEST_PS: 2654 return IEEE80211_TX_STAT_TX_FILTERED; 2655 default: 2656 return 0; 2657 } 2658 } 2659 2660 /** 2661 * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue 2662 */ 2663 static int 2664 il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg, 2665 struct il4965_tx_resp *tx_resp, int txq_id, 2666 u16 start_idx) 2667 { 2668 u16 status; 2669 struct agg_tx_status *frame_status = tx_resp->u.agg_status; 2670 struct ieee80211_tx_info *info = NULL; 2671 struct ieee80211_hdr *hdr = NULL; 2672 u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); 2673 int i, sh, idx; 2674 u16 seq; 2675 if (agg->wait_for_ba) 2676 D_TX_REPLY("got tx response w/o block-ack\n"); 2677 2678 agg->frame_count = tx_resp->frame_count; 2679 agg->start_idx = start_idx; 2680 agg->rate_n_flags = rate_n_flags; 2681 agg->bitmap = 0; 2682 2683 /* num frames attempted by Tx command */ 2684 if (agg->frame_count == 1) { 2685 /* Only one frame was attempted; no block-ack will arrive */ 2686 status = le16_to_cpu(frame_status[0].status); 2687 idx = start_idx; 2688 2689 D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n", 2690 agg->frame_count, agg->start_idx, idx); 2691 2692 info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]); 2693 info->status.rates[0].count = tx_resp->failure_frame + 1; 2694 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 2695 info->flags |= il4965_tx_status_to_mac80211(status); 2696 il4965_hwrate_to_tx_control(il, rate_n_flags, info); 2697 2698 D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff, 2699 tx_resp->failure_frame); 2700 D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags); 2701 2702 agg->wait_for_ba = 0; 2703 } else { 2704 /* Two or more frames were attempted; expect block-ack */ 2705 u64 bitmap = 0; 2706 int start = agg->start_idx; 2707 struct sk_buff *skb; 2708 2709 /* Construct bit-map of pending frames within Tx win */ 2710 for (i = 0; i < agg->frame_count; i++) { 2711 u16 sc; 2712 status = le16_to_cpu(frame_status[i].status); 2713 seq = le16_to_cpu(frame_status[i].sequence); 2714 idx = SEQ_TO_IDX(seq); 2715 txq_id = SEQ_TO_QUEUE(seq); 2716 2717 if (status & 2718 (AGG_TX_STATE_FEW_BYTES_MSK | 2719 AGG_TX_STATE_ABORT_MSK)) 2720 continue; 2721 2722 D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n", 2723 agg->frame_count, txq_id, idx); 2724 2725 skb = il->txq[txq_id].skbs[idx]; 2726 if (WARN_ON_ONCE(skb == NULL)) 2727 return -1; 2728 hdr = (struct ieee80211_hdr *) skb->data; 2729 2730 sc = le16_to_cpu(hdr->seq_ctrl); 2731 if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) { 2732 IL_ERR("BUG_ON idx doesn't match seq control" 2733 " idx=%d, seq_idx=%d, seq=%d\n", idx, 2734 IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl); 2735 return -1; 2736 } 2737 2738 D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx, 2739 IEEE80211_SEQ_TO_SN(sc)); 2740 2741 sh = idx - start; 2742 if (sh > 64) { 2743 sh = (start - idx) + 0xff; 2744 bitmap = bitmap << sh; 2745 sh = 0; 2746 start = idx; 2747 } else if (sh < -64) 2748 sh = 0xff - (start - idx); 2749 else if (sh < 0) { 2750 sh = start - idx; 2751 start = idx; 2752 bitmap = bitmap << sh; 2753 sh = 0; 2754 } 2755 bitmap |= 1ULL << sh; 2756 D_TX_REPLY("start=%d bitmap=0x%llx\n", start, 2757 (unsigned long long)bitmap); 2758 } 2759 2760 agg->bitmap = bitmap; 2761 agg->start_idx = start; 2762 D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n", 2763 agg->frame_count, agg->start_idx, 2764 (unsigned long long)agg->bitmap); 2765 2766 if (bitmap) 2767 agg->wait_for_ba = 1; 2768 } 2769 return 0; 2770 } 2771 2772 /** 2773 * il4965_hdl_tx - Handle standard (non-aggregation) Tx response 2774 */ 2775 static void 2776 il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb) 2777 { 2778 struct il_rx_pkt *pkt = rxb_addr(rxb); 2779 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 2780 int txq_id = SEQ_TO_QUEUE(sequence); 2781 int idx = SEQ_TO_IDX(sequence); 2782 struct il_tx_queue *txq = &il->txq[txq_id]; 2783 struct sk_buff *skb; 2784 struct ieee80211_hdr *hdr; 2785 struct ieee80211_tx_info *info; 2786 struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; 2787 u32 status = le32_to_cpu(tx_resp->u.status); 2788 int uninitialized_var(tid); 2789 int sta_id; 2790 int freed; 2791 u8 *qc = NULL; 2792 unsigned long flags; 2793 2794 if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) { 2795 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d " 2796 "is out of range [0-%d] %d %d\n", txq_id, idx, 2797 txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr); 2798 return; 2799 } 2800 2801 txq->time_stamp = jiffies; 2802 2803 skb = txq->skbs[txq->q.read_ptr]; 2804 info = IEEE80211_SKB_CB(skb); 2805 memset(&info->status, 0, sizeof(info->status)); 2806 2807 hdr = (struct ieee80211_hdr *) skb->data; 2808 if (ieee80211_is_data_qos(hdr->frame_control)) { 2809 qc = ieee80211_get_qos_ctl(hdr); 2810 tid = qc[0] & 0xf; 2811 } 2812 2813 sta_id = il4965_get_ra_sta_id(il, hdr); 2814 if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) { 2815 IL_ERR("Station not known\n"); 2816 return; 2817 } 2818 2819 /* 2820 * Firmware will not transmit frame on passive channel, if it not yet 2821 * received some valid frame on that channel. When this error happen 2822 * we have to wait until firmware will unblock itself i.e. when we 2823 * note received beacon or other frame. We unblock queues in 2824 * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed. 2825 */ 2826 if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) && 2827 il->iw_mode == NL80211_IFTYPE_STATION) { 2828 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE); 2829 D_INFO("Stopped queues - RX waiting on passive channel\n"); 2830 } 2831 2832 spin_lock_irqsave(&il->sta_lock, flags); 2833 if (txq->sched_retry) { 2834 const u32 scd_ssn = il4965_get_scd_ssn(tx_resp); 2835 struct il_ht_agg *agg = NULL; 2836 WARN_ON(!qc); 2837 2838 agg = &il->stations[sta_id].tid[tid].agg; 2839 2840 il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx); 2841 2842 /* check if BAR is needed */ 2843 if (tx_resp->frame_count == 1 && 2844 !il4965_is_tx_success(status)) 2845 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 2846 2847 if (txq->q.read_ptr != (scd_ssn & 0xff)) { 2848 idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd); 2849 D_TX_REPLY("Retry scheduler reclaim scd_ssn " 2850 "%d idx %d\n", scd_ssn, idx); 2851 freed = il4965_tx_queue_reclaim(il, txq_id, idx); 2852 if (qc) 2853 il4965_free_tfds_in_queue(il, sta_id, tid, 2854 freed); 2855 2856 if (il->mac80211_registered && 2857 il_queue_space(&txq->q) > txq->q.low_mark && 2858 agg->state != IL_EMPTYING_HW_QUEUE_DELBA) 2859 il_wake_queue(il, txq); 2860 } 2861 } else { 2862 info->status.rates[0].count = tx_resp->failure_frame + 1; 2863 info->flags |= il4965_tx_status_to_mac80211(status); 2864 il4965_hwrate_to_tx_control(il, 2865 le32_to_cpu(tx_resp->rate_n_flags), 2866 info); 2867 2868 D_TX_REPLY("TXQ %d status %s (0x%08x) " 2869 "rate_n_flags 0x%x retries %d\n", txq_id, 2870 il4965_get_tx_fail_reason(status), status, 2871 le32_to_cpu(tx_resp->rate_n_flags), 2872 tx_resp->failure_frame); 2873 2874 freed = il4965_tx_queue_reclaim(il, txq_id, idx); 2875 if (qc && likely(sta_id != IL_INVALID_STATION)) 2876 il4965_free_tfds_in_queue(il, sta_id, tid, freed); 2877 else if (sta_id == IL_INVALID_STATION) 2878 D_TX_REPLY("Station not known\n"); 2879 2880 if (il->mac80211_registered && 2881 il_queue_space(&txq->q) > txq->q.low_mark) 2882 il_wake_queue(il, txq); 2883 } 2884 if (qc && likely(sta_id != IL_INVALID_STATION)) 2885 il4965_txq_check_empty(il, sta_id, tid, txq_id); 2886 2887 il4965_check_abort_status(il, tx_resp->frame_count, status); 2888 2889 spin_unlock_irqrestore(&il->sta_lock, flags); 2890 } 2891 2892 /** 2893 * translate ucode response to mac80211 tx status control values 2894 */ 2895 void 2896 il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags, 2897 struct ieee80211_tx_info *info) 2898 { 2899 struct ieee80211_tx_rate *r = &info->status.rates[0]; 2900 2901 info->status.antenna = 2902 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 2903 if (rate_n_flags & RATE_MCS_HT_MSK) 2904 r->flags |= IEEE80211_TX_RC_MCS; 2905 if (rate_n_flags & RATE_MCS_GF_MSK) 2906 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 2907 if (rate_n_flags & RATE_MCS_HT40_MSK) 2908 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 2909 if (rate_n_flags & RATE_MCS_DUP_MSK) 2910 r->flags |= IEEE80211_TX_RC_DUP_DATA; 2911 if (rate_n_flags & RATE_MCS_SGI_MSK) 2912 r->flags |= IEEE80211_TX_RC_SHORT_GI; 2913 r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band); 2914 } 2915 2916 /** 2917 * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA 2918 * 2919 * Handles block-acknowledge notification from device, which reports success 2920 * of frames sent via aggregation. 2921 */ 2922 static void 2923 il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb) 2924 { 2925 struct il_rx_pkt *pkt = rxb_addr(rxb); 2926 struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; 2927 struct il_tx_queue *txq = NULL; 2928 struct il_ht_agg *agg; 2929 int idx; 2930 int sta_id; 2931 int tid; 2932 unsigned long flags; 2933 2934 /* "flow" corresponds to Tx queue */ 2935 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 2936 2937 /* "ssn" is start of block-ack Tx win, corresponds to idx 2938 * (in Tx queue's circular buffer) of first TFD/frame in win */ 2939 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); 2940 2941 if (scd_flow >= il->hw_params.max_txq_num) { 2942 IL_ERR("BUG_ON scd_flow is bigger than number of queues\n"); 2943 return; 2944 } 2945 2946 txq = &il->txq[scd_flow]; 2947 sta_id = ba_resp->sta_id; 2948 tid = ba_resp->tid; 2949 agg = &il->stations[sta_id].tid[tid].agg; 2950 if (unlikely(agg->txq_id != scd_flow)) { 2951 /* 2952 * FIXME: this is a uCode bug which need to be addressed, 2953 * log the information and return for now! 2954 * since it is possible happen very often and in order 2955 * not to fill the syslog, don't enable the logging by default 2956 */ 2957 D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n", 2958 scd_flow, agg->txq_id); 2959 return; 2960 } 2961 2962 /* Find idx just before block-ack win */ 2963 idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); 2964 2965 spin_lock_irqsave(&il->sta_lock, flags); 2966 2967 D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n", 2968 agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32, 2969 ba_resp->sta_id); 2970 D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = " 2971 "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl, 2972 (unsigned long long)le64_to_cpu(ba_resp->bitmap), 2973 ba_resp->scd_flow, ba_resp->scd_ssn); 2974 D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx, 2975 (unsigned long long)agg->bitmap); 2976 2977 /* Update driver's record of ACK vs. not for each frame in win */ 2978 il4965_tx_status_reply_compressed_ba(il, agg, ba_resp); 2979 2980 /* Release all TFDs before the SSN, i.e. all TFDs in front of 2981 * block-ack win (we assume that they've been successfully 2982 * transmitted ... if not, it's too late anyway). */ 2983 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) { 2984 /* calculate mac80211 ampdu sw queue to wake */ 2985 int freed = il4965_tx_queue_reclaim(il, scd_flow, idx); 2986 il4965_free_tfds_in_queue(il, sta_id, tid, freed); 2987 2988 if (il_queue_space(&txq->q) > txq->q.low_mark && 2989 il->mac80211_registered && 2990 agg->state != IL_EMPTYING_HW_QUEUE_DELBA) 2991 il_wake_queue(il, txq); 2992 2993 il4965_txq_check_empty(il, sta_id, tid, scd_flow); 2994 } 2995 2996 spin_unlock_irqrestore(&il->sta_lock, flags); 2997 } 2998 2999 #ifdef CONFIG_IWLEGACY_DEBUG 3000 const char * 3001 il4965_get_tx_fail_reason(u32 status) 3002 { 3003 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 3004 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 3005 3006 switch (status & TX_STATUS_MSK) { 3007 case TX_STATUS_SUCCESS: 3008 return "SUCCESS"; 3009 TX_STATUS_POSTPONE(DELAY); 3010 TX_STATUS_POSTPONE(FEW_BYTES); 3011 TX_STATUS_POSTPONE(QUIET_PERIOD); 3012 TX_STATUS_POSTPONE(CALC_TTAK); 3013 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 3014 TX_STATUS_FAIL(SHORT_LIMIT); 3015 TX_STATUS_FAIL(LONG_LIMIT); 3016 TX_STATUS_FAIL(FIFO_UNDERRUN); 3017 TX_STATUS_FAIL(DRAIN_FLOW); 3018 TX_STATUS_FAIL(RFKILL_FLUSH); 3019 TX_STATUS_FAIL(LIFE_EXPIRE); 3020 TX_STATUS_FAIL(DEST_PS); 3021 TX_STATUS_FAIL(HOST_ABORTED); 3022 TX_STATUS_FAIL(BT_RETRY); 3023 TX_STATUS_FAIL(STA_INVALID); 3024 TX_STATUS_FAIL(FRAG_DROPPED); 3025 TX_STATUS_FAIL(TID_DISABLE); 3026 TX_STATUS_FAIL(FIFO_FLUSHED); 3027 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); 3028 TX_STATUS_FAIL(PASSIVE_NO_RX); 3029 TX_STATUS_FAIL(NO_BEACON_ON_RADAR); 3030 } 3031 3032 return "UNKNOWN"; 3033 3034 #undef TX_STATUS_FAIL 3035 #undef TX_STATUS_POSTPONE 3036 } 3037 #endif /* CONFIG_IWLEGACY_DEBUG */ 3038 3039 static struct il_link_quality_cmd * 3040 il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id) 3041 { 3042 int i, r; 3043 struct il_link_quality_cmd *link_cmd; 3044 u32 rate_flags = 0; 3045 __le32 rate_n_flags; 3046 3047 link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL); 3048 if (!link_cmd) { 3049 IL_ERR("Unable to allocate memory for LQ cmd.\n"); 3050 return NULL; 3051 } 3052 /* Set up the rate scaling to start at selected rate, fall back 3053 * all the way down to 1M in IEEE order, and then spin on 1M */ 3054 if (il->band == NL80211_BAND_5GHZ) 3055 r = RATE_6M_IDX; 3056 else 3057 r = RATE_1M_IDX; 3058 3059 if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE) 3060 rate_flags |= RATE_MCS_CCK_MSK; 3061 3062 rate_flags |= 3063 il4965_first_antenna(il->hw_params. 3064 valid_tx_ant) << RATE_MCS_ANT_POS; 3065 rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags); 3066 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) 3067 link_cmd->rs_table[i].rate_n_flags = rate_n_flags; 3068 3069 link_cmd->general_params.single_stream_ant_msk = 3070 il4965_first_antenna(il->hw_params.valid_tx_ant); 3071 3072 link_cmd->general_params.dual_stream_ant_msk = 3073 il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params. 3074 valid_tx_ant); 3075 if (!link_cmd->general_params.dual_stream_ant_msk) { 3076 link_cmd->general_params.dual_stream_ant_msk = ANT_AB; 3077 } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) { 3078 link_cmd->general_params.dual_stream_ant_msk = 3079 il->hw_params.valid_tx_ant; 3080 } 3081 3082 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; 3083 link_cmd->agg_params.agg_time_limit = 3084 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); 3085 3086 link_cmd->sta_id = sta_id; 3087 3088 return link_cmd; 3089 } 3090 3091 /* 3092 * il4965_add_bssid_station - Add the special IBSS BSSID station 3093 * 3094 * Function sleeps. 3095 */ 3096 int 3097 il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r) 3098 { 3099 int ret; 3100 u8 sta_id; 3101 struct il_link_quality_cmd *link_cmd; 3102 unsigned long flags; 3103 3104 if (sta_id_r) 3105 *sta_id_r = IL_INVALID_STATION; 3106 3107 ret = il_add_station_common(il, addr, 0, NULL, &sta_id); 3108 if (ret) { 3109 IL_ERR("Unable to add station %pM\n", addr); 3110 return ret; 3111 } 3112 3113 if (sta_id_r) 3114 *sta_id_r = sta_id; 3115 3116 spin_lock_irqsave(&il->sta_lock, flags); 3117 il->stations[sta_id].used |= IL_STA_LOCAL; 3118 spin_unlock_irqrestore(&il->sta_lock, flags); 3119 3120 /* Set up default rate scaling table in device's station table */ 3121 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3122 if (!link_cmd) { 3123 IL_ERR("Unable to initialize rate scaling for station %pM.\n", 3124 addr); 3125 return -ENOMEM; 3126 } 3127 3128 ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true); 3129 if (ret) 3130 IL_ERR("Link quality command failed (%d)\n", ret); 3131 3132 spin_lock_irqsave(&il->sta_lock, flags); 3133 il->stations[sta_id].lq = link_cmd; 3134 spin_unlock_irqrestore(&il->sta_lock, flags); 3135 3136 return 0; 3137 } 3138 3139 static int 3140 il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty) 3141 { 3142 int i; 3143 u8 buff[sizeof(struct il_wep_cmd) + 3144 sizeof(struct il_wep_key) * WEP_KEYS_MAX]; 3145 struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff; 3146 size_t cmd_size = sizeof(struct il_wep_cmd); 3147 struct il_host_cmd cmd = { 3148 .id = C_WEPKEY, 3149 .data = wep_cmd, 3150 .flags = CMD_SYNC, 3151 }; 3152 bool not_empty = false; 3153 3154 might_sleep(); 3155 3156 memset(wep_cmd, 0, 3157 cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX)); 3158 3159 for (i = 0; i < WEP_KEYS_MAX; i++) { 3160 u8 key_size = il->_4965.wep_keys[i].key_size; 3161 3162 wep_cmd->key[i].key_idx = i; 3163 if (key_size) { 3164 wep_cmd->key[i].key_offset = i; 3165 not_empty = true; 3166 } else 3167 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET; 3168 3169 wep_cmd->key[i].key_size = key_size; 3170 memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size); 3171 } 3172 3173 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE; 3174 wep_cmd->num_keys = WEP_KEYS_MAX; 3175 3176 cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX; 3177 cmd.len = cmd_size; 3178 3179 if (not_empty || send_if_empty) 3180 return il_send_cmd(il, &cmd); 3181 else 3182 return 0; 3183 } 3184 3185 int 3186 il4965_restore_default_wep_keys(struct il_priv *il) 3187 { 3188 lockdep_assert_held(&il->mutex); 3189 3190 return il4965_static_wepkey_cmd(il, false); 3191 } 3192 3193 int 3194 il4965_remove_default_wep_key(struct il_priv *il, 3195 struct ieee80211_key_conf *keyconf) 3196 { 3197 int ret; 3198 int idx = keyconf->keyidx; 3199 3200 lockdep_assert_held(&il->mutex); 3201 3202 D_WEP("Removing default WEP key: idx=%d\n", idx); 3203 3204 memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key)); 3205 if (il_is_rfkill(il)) { 3206 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n"); 3207 /* but keys in device are clear anyway so return success */ 3208 return 0; 3209 } 3210 ret = il4965_static_wepkey_cmd(il, 1); 3211 D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret); 3212 3213 return ret; 3214 } 3215 3216 int 3217 il4965_set_default_wep_key(struct il_priv *il, 3218 struct ieee80211_key_conf *keyconf) 3219 { 3220 int ret; 3221 int len = keyconf->keylen; 3222 int idx = keyconf->keyidx; 3223 3224 lockdep_assert_held(&il->mutex); 3225 3226 if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) { 3227 D_WEP("Bad WEP key length %d\n", keyconf->keylen); 3228 return -EINVAL; 3229 } 3230 3231 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; 3232 keyconf->hw_key_idx = HW_KEY_DEFAULT; 3233 il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher; 3234 3235 il->_4965.wep_keys[idx].key_size = len; 3236 memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len); 3237 3238 ret = il4965_static_wepkey_cmd(il, false); 3239 3240 D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret); 3241 return ret; 3242 } 3243 3244 static int 3245 il4965_set_wep_dynamic_key_info(struct il_priv *il, 3246 struct ieee80211_key_conf *keyconf, u8 sta_id) 3247 { 3248 unsigned long flags; 3249 __le16 key_flags = 0; 3250 struct il_addsta_cmd sta_cmd; 3251 3252 lockdep_assert_held(&il->mutex); 3253 3254 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV; 3255 3256 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK); 3257 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3258 key_flags &= ~STA_KEY_FLG_INVALID; 3259 3260 if (keyconf->keylen == WEP_KEY_LEN_128) 3261 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK; 3262 3263 if (sta_id == il->hw_params.bcast_id) 3264 key_flags |= STA_KEY_MULTICAST_MSK; 3265 3266 spin_lock_irqsave(&il->sta_lock, flags); 3267 3268 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3269 il->stations[sta_id].keyinfo.keylen = keyconf->keylen; 3270 il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx; 3271 3272 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); 3273 3274 memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key, 3275 keyconf->keylen); 3276 3277 if ((il->stations[sta_id].sta.key. 3278 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3279 il->stations[sta_id].sta.key.key_offset = 3280 il_get_free_ucode_key_idx(il); 3281 /* else, we are overriding an existing key => no need to allocated room 3282 * in uCode. */ 3283 3284 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3285 "no space for a new key"); 3286 3287 il->stations[sta_id].sta.key.key_flags = key_flags; 3288 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3289 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3290 3291 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3292 sizeof(struct il_addsta_cmd)); 3293 spin_unlock_irqrestore(&il->sta_lock, flags); 3294 3295 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3296 } 3297 3298 static int 3299 il4965_set_ccmp_dynamic_key_info(struct il_priv *il, 3300 struct ieee80211_key_conf *keyconf, u8 sta_id) 3301 { 3302 unsigned long flags; 3303 __le16 key_flags = 0; 3304 struct il_addsta_cmd sta_cmd; 3305 3306 lockdep_assert_held(&il->mutex); 3307 3308 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK); 3309 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3310 key_flags &= ~STA_KEY_FLG_INVALID; 3311 3312 if (sta_id == il->hw_params.bcast_id) 3313 key_flags |= STA_KEY_MULTICAST_MSK; 3314 3315 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 3316 3317 spin_lock_irqsave(&il->sta_lock, flags); 3318 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3319 il->stations[sta_id].keyinfo.keylen = keyconf->keylen; 3320 3321 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); 3322 3323 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen); 3324 3325 if ((il->stations[sta_id].sta.key. 3326 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3327 il->stations[sta_id].sta.key.key_offset = 3328 il_get_free_ucode_key_idx(il); 3329 /* else, we are overriding an existing key => no need to allocated room 3330 * in uCode. */ 3331 3332 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3333 "no space for a new key"); 3334 3335 il->stations[sta_id].sta.key.key_flags = key_flags; 3336 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3337 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3338 3339 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3340 sizeof(struct il_addsta_cmd)); 3341 spin_unlock_irqrestore(&il->sta_lock, flags); 3342 3343 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3344 } 3345 3346 static int 3347 il4965_set_tkip_dynamic_key_info(struct il_priv *il, 3348 struct ieee80211_key_conf *keyconf, u8 sta_id) 3349 { 3350 unsigned long flags; 3351 int ret = 0; 3352 __le16 key_flags = 0; 3353 3354 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK); 3355 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 3356 key_flags &= ~STA_KEY_FLG_INVALID; 3357 3358 if (sta_id == il->hw_params.bcast_id) 3359 key_flags |= STA_KEY_MULTICAST_MSK; 3360 3361 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 3362 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 3363 3364 spin_lock_irqsave(&il->sta_lock, flags); 3365 3366 il->stations[sta_id].keyinfo.cipher = keyconf->cipher; 3367 il->stations[sta_id].keyinfo.keylen = 16; 3368 3369 if ((il->stations[sta_id].sta.key. 3370 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) 3371 il->stations[sta_id].sta.key.key_offset = 3372 il_get_free_ucode_key_idx(il); 3373 /* else, we are overriding an existing key => no need to allocated room 3374 * in uCode. */ 3375 3376 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, 3377 "no space for a new key"); 3378 3379 il->stations[sta_id].sta.key.key_flags = key_flags; 3380 3381 /* This copy is acutally not needed: we get the key with each TX */ 3382 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16); 3383 3384 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16); 3385 3386 spin_unlock_irqrestore(&il->sta_lock, flags); 3387 3388 return ret; 3389 } 3390 3391 void 3392 il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, 3393 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) 3394 { 3395 u8 sta_id; 3396 unsigned long flags; 3397 int i; 3398 3399 if (il_scan_cancel(il)) { 3400 /* cancel scan failed, just live w/ bad key and rely 3401 briefly on SW decryption */ 3402 return; 3403 } 3404 3405 sta_id = il_sta_id_or_broadcast(il, sta); 3406 if (sta_id == IL_INVALID_STATION) 3407 return; 3408 3409 spin_lock_irqsave(&il->sta_lock, flags); 3410 3411 il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32; 3412 3413 for (i = 0; i < 5; i++) 3414 il->stations[sta_id].sta.key.tkip_rx_ttak[i] = 3415 cpu_to_le16(phase1key[i]); 3416 3417 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3418 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3419 3420 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); 3421 3422 spin_unlock_irqrestore(&il->sta_lock, flags); 3423 } 3424 3425 int 3426 il4965_remove_dynamic_key(struct il_priv *il, 3427 struct ieee80211_key_conf *keyconf, u8 sta_id) 3428 { 3429 unsigned long flags; 3430 u16 key_flags; 3431 u8 keyidx; 3432 struct il_addsta_cmd sta_cmd; 3433 3434 lockdep_assert_held(&il->mutex); 3435 3436 il->_4965.key_mapping_keys--; 3437 3438 spin_lock_irqsave(&il->sta_lock, flags); 3439 key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags); 3440 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3; 3441 3442 D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id); 3443 3444 if (keyconf->keyidx != keyidx) { 3445 /* We need to remove a key with idx different that the one 3446 * in the uCode. This means that the key we need to remove has 3447 * been replaced by another one with different idx. 3448 * Don't do anything and return ok 3449 */ 3450 spin_unlock_irqrestore(&il->sta_lock, flags); 3451 return 0; 3452 } 3453 3454 if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) { 3455 IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx, 3456 key_flags); 3457 spin_unlock_irqrestore(&il->sta_lock, flags); 3458 return 0; 3459 } 3460 3461 if (!test_and_clear_bit 3462 (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table)) 3463 IL_ERR("idx %d not used in uCode key table.\n", 3464 il->stations[sta_id].sta.key.key_offset); 3465 memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key)); 3466 memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo)); 3467 il->stations[sta_id].sta.key.key_flags = 3468 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID; 3469 il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx; 3470 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; 3471 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3472 3473 if (il_is_rfkill(il)) { 3474 D_WEP 3475 ("Not sending C_ADD_STA command because RFKILL enabled.\n"); 3476 spin_unlock_irqrestore(&il->sta_lock, flags); 3477 return 0; 3478 } 3479 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3480 sizeof(struct il_addsta_cmd)); 3481 spin_unlock_irqrestore(&il->sta_lock, flags); 3482 3483 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3484 } 3485 3486 int 3487 il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, 3488 u8 sta_id) 3489 { 3490 int ret; 3491 3492 lockdep_assert_held(&il->mutex); 3493 3494 il->_4965.key_mapping_keys++; 3495 keyconf->hw_key_idx = HW_KEY_DYNAMIC; 3496 3497 switch (keyconf->cipher) { 3498 case WLAN_CIPHER_SUITE_CCMP: 3499 ret = 3500 il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id); 3501 break; 3502 case WLAN_CIPHER_SUITE_TKIP: 3503 ret = 3504 il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id); 3505 break; 3506 case WLAN_CIPHER_SUITE_WEP40: 3507 case WLAN_CIPHER_SUITE_WEP104: 3508 ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id); 3509 break; 3510 default: 3511 IL_ERR("Unknown alg: %s cipher = %x\n", __func__, 3512 keyconf->cipher); 3513 ret = -EINVAL; 3514 } 3515 3516 D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n", 3517 keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret); 3518 3519 return ret; 3520 } 3521 3522 /** 3523 * il4965_alloc_bcast_station - add broadcast station into driver's station table. 3524 * 3525 * This adds the broadcast station into the driver's station table 3526 * and marks it driver active, so that it will be restored to the 3527 * device at the next best time. 3528 */ 3529 int 3530 il4965_alloc_bcast_station(struct il_priv *il) 3531 { 3532 struct il_link_quality_cmd *link_cmd; 3533 unsigned long flags; 3534 u8 sta_id; 3535 3536 spin_lock_irqsave(&il->sta_lock, flags); 3537 sta_id = il_prep_station(il, il_bcast_addr, false, NULL); 3538 if (sta_id == IL_INVALID_STATION) { 3539 IL_ERR("Unable to prepare broadcast station\n"); 3540 spin_unlock_irqrestore(&il->sta_lock, flags); 3541 3542 return -EINVAL; 3543 } 3544 3545 il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE; 3546 il->stations[sta_id].used |= IL_STA_BCAST; 3547 spin_unlock_irqrestore(&il->sta_lock, flags); 3548 3549 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3550 if (!link_cmd) { 3551 IL_ERR 3552 ("Unable to initialize rate scaling for bcast station.\n"); 3553 return -ENOMEM; 3554 } 3555 3556 spin_lock_irqsave(&il->sta_lock, flags); 3557 il->stations[sta_id].lq = link_cmd; 3558 spin_unlock_irqrestore(&il->sta_lock, flags); 3559 3560 return 0; 3561 } 3562 3563 /** 3564 * il4965_update_bcast_station - update broadcast station's LQ command 3565 * 3566 * Only used by iwl4965. Placed here to have all bcast station management 3567 * code together. 3568 */ 3569 static int 3570 il4965_update_bcast_station(struct il_priv *il) 3571 { 3572 unsigned long flags; 3573 struct il_link_quality_cmd *link_cmd; 3574 u8 sta_id = il->hw_params.bcast_id; 3575 3576 link_cmd = il4965_sta_alloc_lq(il, sta_id); 3577 if (!link_cmd) { 3578 IL_ERR("Unable to initialize rate scaling for bcast sta.\n"); 3579 return -ENOMEM; 3580 } 3581 3582 spin_lock_irqsave(&il->sta_lock, flags); 3583 if (il->stations[sta_id].lq) 3584 kfree(il->stations[sta_id].lq); 3585 else 3586 D_INFO("Bcast sta rate scaling has not been initialized.\n"); 3587 il->stations[sta_id].lq = link_cmd; 3588 spin_unlock_irqrestore(&il->sta_lock, flags); 3589 3590 return 0; 3591 } 3592 3593 int 3594 il4965_update_bcast_stations(struct il_priv *il) 3595 { 3596 return il4965_update_bcast_station(il); 3597 } 3598 3599 /** 3600 * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table 3601 */ 3602 int 3603 il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid) 3604 { 3605 unsigned long flags; 3606 struct il_addsta_cmd sta_cmd; 3607 3608 lockdep_assert_held(&il->mutex); 3609 3610 /* Remove "disable" flag, to enable Tx for this TID */ 3611 spin_lock_irqsave(&il->sta_lock, flags); 3612 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; 3613 il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); 3614 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3615 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3616 sizeof(struct il_addsta_cmd)); 3617 spin_unlock_irqrestore(&il->sta_lock, flags); 3618 3619 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3620 } 3621 3622 int 3623 il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid, 3624 u16 ssn) 3625 { 3626 unsigned long flags; 3627 int sta_id; 3628 struct il_addsta_cmd sta_cmd; 3629 3630 lockdep_assert_held(&il->mutex); 3631 3632 sta_id = il_sta_id(sta); 3633 if (sta_id == IL_INVALID_STATION) 3634 return -ENXIO; 3635 3636 spin_lock_irqsave(&il->sta_lock, flags); 3637 il->stations[sta_id].sta.station_flags_msk = 0; 3638 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; 3639 il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid; 3640 il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); 3641 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3642 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3643 sizeof(struct il_addsta_cmd)); 3644 spin_unlock_irqrestore(&il->sta_lock, flags); 3645 3646 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3647 } 3648 3649 int 3650 il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid) 3651 { 3652 unsigned long flags; 3653 int sta_id; 3654 struct il_addsta_cmd sta_cmd; 3655 3656 lockdep_assert_held(&il->mutex); 3657 3658 sta_id = il_sta_id(sta); 3659 if (sta_id == IL_INVALID_STATION) { 3660 IL_ERR("Invalid station for AGG tid %d\n", tid); 3661 return -ENXIO; 3662 } 3663 3664 spin_lock_irqsave(&il->sta_lock, flags); 3665 il->stations[sta_id].sta.station_flags_msk = 0; 3666 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; 3667 il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid; 3668 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3669 memcpy(&sta_cmd, &il->stations[sta_id].sta, 3670 sizeof(struct il_addsta_cmd)); 3671 spin_unlock_irqrestore(&il->sta_lock, flags); 3672 3673 return il_send_add_sta(il, &sta_cmd, CMD_SYNC); 3674 } 3675 3676 void 3677 il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt) 3678 { 3679 unsigned long flags; 3680 3681 spin_lock_irqsave(&il->sta_lock, flags); 3682 il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK; 3683 il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK; 3684 il->stations[sta_id].sta.sta.modify_mask = 3685 STA_MODIFY_SLEEP_TX_COUNT_MSK; 3686 il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt); 3687 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 3688 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); 3689 spin_unlock_irqrestore(&il->sta_lock, flags); 3690 3691 } 3692 3693 void 3694 il4965_update_chain_flags(struct il_priv *il) 3695 { 3696 if (il->ops->set_rxon_chain) { 3697 il->ops->set_rxon_chain(il); 3698 if (il->active.rx_chain != il->staging.rx_chain) 3699 il_commit_rxon(il); 3700 } 3701 } 3702 3703 static void 3704 il4965_clear_free_frames(struct il_priv *il) 3705 { 3706 struct list_head *element; 3707 3708 D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count); 3709 3710 while (!list_empty(&il->free_frames)) { 3711 element = il->free_frames.next; 3712 list_del(element); 3713 kfree(list_entry(element, struct il_frame, list)); 3714 il->frames_count--; 3715 } 3716 3717 if (il->frames_count) { 3718 IL_WARN("%d frames still in use. Did we lose one?\n", 3719 il->frames_count); 3720 il->frames_count = 0; 3721 } 3722 } 3723 3724 static struct il_frame * 3725 il4965_get_free_frame(struct il_priv *il) 3726 { 3727 struct il_frame *frame; 3728 struct list_head *element; 3729 if (list_empty(&il->free_frames)) { 3730 frame = kzalloc(sizeof(*frame), GFP_KERNEL); 3731 if (!frame) { 3732 IL_ERR("Could not allocate frame!\n"); 3733 return NULL; 3734 } 3735 3736 il->frames_count++; 3737 return frame; 3738 } 3739 3740 element = il->free_frames.next; 3741 list_del(element); 3742 return list_entry(element, struct il_frame, list); 3743 } 3744 3745 static void 3746 il4965_free_frame(struct il_priv *il, struct il_frame *frame) 3747 { 3748 memset(frame, 0, sizeof(*frame)); 3749 list_add(&frame->list, &il->free_frames); 3750 } 3751 3752 static u32 3753 il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr, 3754 int left) 3755 { 3756 lockdep_assert_held(&il->mutex); 3757 3758 if (!il->beacon_skb) 3759 return 0; 3760 3761 if (il->beacon_skb->len > left) 3762 return 0; 3763 3764 memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len); 3765 3766 return il->beacon_skb->len; 3767 } 3768 3769 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */ 3770 static void 3771 il4965_set_beacon_tim(struct il_priv *il, 3772 struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon, 3773 u32 frame_size) 3774 { 3775 u16 tim_idx; 3776 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 3777 3778 /* 3779 * The idx is relative to frame start but we start looking at the 3780 * variable-length part of the beacon. 3781 */ 3782 tim_idx = mgmt->u.beacon.variable - beacon; 3783 3784 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 3785 while ((tim_idx < (frame_size - 2)) && 3786 (beacon[tim_idx] != WLAN_EID_TIM)) 3787 tim_idx += beacon[tim_idx + 1] + 2; 3788 3789 /* If TIM field was found, set variables */ 3790 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 3791 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx); 3792 tx_beacon_cmd->tim_size = beacon[tim_idx + 1]; 3793 } else 3794 IL_WARN("Unable to find TIM Element in beacon\n"); 3795 } 3796 3797 static unsigned int 3798 il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame) 3799 { 3800 struct il_tx_beacon_cmd *tx_beacon_cmd; 3801 u32 frame_size; 3802 u32 rate_flags; 3803 u32 rate; 3804 /* 3805 * We have to set up the TX command, the TX Beacon command, and the 3806 * beacon contents. 3807 */ 3808 3809 lockdep_assert_held(&il->mutex); 3810 3811 if (!il->beacon_enabled) { 3812 IL_ERR("Trying to build beacon without beaconing enabled\n"); 3813 return 0; 3814 } 3815 3816 /* Initialize memory */ 3817 tx_beacon_cmd = &frame->u.beacon; 3818 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); 3819 3820 /* Set up TX beacon contents */ 3821 frame_size = 3822 il4965_fill_beacon_frame(il, tx_beacon_cmd->frame, 3823 sizeof(frame->u) - sizeof(*tx_beacon_cmd)); 3824 if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE)) 3825 return 0; 3826 if (!frame_size) 3827 return 0; 3828 3829 /* Set up TX command fields */ 3830 tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size); 3831 tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id; 3832 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 3833 tx_beacon_cmd->tx.tx_flags = 3834 TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK | 3835 TX_CMD_FLG_STA_RATE_MSK; 3836 3837 /* Set up TX beacon command fields */ 3838 il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame, 3839 frame_size); 3840 3841 /* Set up packet rate and flags */ 3842 rate = il_get_lowest_plcp(il); 3843 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant); 3844 rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS; 3845 if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE)) 3846 rate_flags |= RATE_MCS_CCK_MSK; 3847 tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags); 3848 3849 return sizeof(*tx_beacon_cmd) + frame_size; 3850 } 3851 3852 int 3853 il4965_send_beacon_cmd(struct il_priv *il) 3854 { 3855 struct il_frame *frame; 3856 unsigned int frame_size; 3857 int rc; 3858 3859 frame = il4965_get_free_frame(il); 3860 if (!frame) { 3861 IL_ERR("Could not obtain free frame buffer for beacon " 3862 "command.\n"); 3863 return -ENOMEM; 3864 } 3865 3866 frame_size = il4965_hw_get_beacon_cmd(il, frame); 3867 if (!frame_size) { 3868 IL_ERR("Error configuring the beacon command\n"); 3869 il4965_free_frame(il, frame); 3870 return -EINVAL; 3871 } 3872 3873 rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]); 3874 3875 il4965_free_frame(il, frame); 3876 3877 return rc; 3878 } 3879 3880 static inline dma_addr_t 3881 il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx) 3882 { 3883 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3884 3885 dma_addr_t addr = get_unaligned_le32(&tb->lo); 3886 if (sizeof(dma_addr_t) > sizeof(u32)) 3887 addr |= 3888 ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 3889 16; 3890 3891 return addr; 3892 } 3893 3894 static inline u16 3895 il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx) 3896 { 3897 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3898 3899 return le16_to_cpu(tb->hi_n_len) >> 4; 3900 } 3901 3902 static inline void 3903 il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len) 3904 { 3905 struct il_tfd_tb *tb = &tfd->tbs[idx]; 3906 u16 hi_n_len = len << 4; 3907 3908 put_unaligned_le32(addr, &tb->lo); 3909 if (sizeof(dma_addr_t) > sizeof(u32)) 3910 hi_n_len |= ((addr >> 16) >> 16) & 0xF; 3911 3912 tb->hi_n_len = cpu_to_le16(hi_n_len); 3913 3914 tfd->num_tbs = idx + 1; 3915 } 3916 3917 static inline u8 3918 il4965_tfd_get_num_tbs(struct il_tfd *tfd) 3919 { 3920 return tfd->num_tbs & 0x1f; 3921 } 3922 3923 /** 3924 * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] 3925 * @il - driver ilate data 3926 * @txq - tx queue 3927 * 3928 * Does NOT advance any TFD circular buffer read/write idxes 3929 * Does NOT free the TFD itself (which is within circular buffer) 3930 */ 3931 void 3932 il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq) 3933 { 3934 struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds; 3935 struct il_tfd *tfd; 3936 struct pci_dev *dev = il->pci_dev; 3937 int idx = txq->q.read_ptr; 3938 int i; 3939 int num_tbs; 3940 3941 tfd = &tfd_tmp[idx]; 3942 3943 /* Sanity check on number of chunks */ 3944 num_tbs = il4965_tfd_get_num_tbs(tfd); 3945 3946 if (num_tbs >= IL_NUM_OF_TBS) { 3947 IL_ERR("Too many chunks: %i\n", num_tbs); 3948 /* @todo issue fatal error, it is quite serious situation */ 3949 return; 3950 } 3951 3952 /* Unmap tx_cmd */ 3953 if (num_tbs) 3954 pci_unmap_single(dev, dma_unmap_addr(&txq->meta[idx], mapping), 3955 dma_unmap_len(&txq->meta[idx], len), 3956 PCI_DMA_BIDIRECTIONAL); 3957 3958 /* Unmap chunks, if any. */ 3959 for (i = 1; i < num_tbs; i++) 3960 pci_unmap_single(dev, il4965_tfd_tb_get_addr(tfd, i), 3961 il4965_tfd_tb_get_len(tfd, i), 3962 PCI_DMA_TODEVICE); 3963 3964 /* free SKB */ 3965 if (txq->skbs) { 3966 struct sk_buff *skb = txq->skbs[txq->q.read_ptr]; 3967 3968 /* can be called from irqs-disabled context */ 3969 if (skb) { 3970 dev_kfree_skb_any(skb); 3971 txq->skbs[txq->q.read_ptr] = NULL; 3972 } 3973 } 3974 } 3975 3976 int 3977 il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq, 3978 dma_addr_t addr, u16 len, u8 reset, u8 pad) 3979 { 3980 struct il_queue *q; 3981 struct il_tfd *tfd, *tfd_tmp; 3982 u32 num_tbs; 3983 3984 q = &txq->q; 3985 tfd_tmp = (struct il_tfd *)txq->tfds; 3986 tfd = &tfd_tmp[q->write_ptr]; 3987 3988 if (reset) 3989 memset(tfd, 0, sizeof(*tfd)); 3990 3991 num_tbs = il4965_tfd_get_num_tbs(tfd); 3992 3993 /* Each TFD can point to a maximum 20 Tx buffers */ 3994 if (num_tbs >= IL_NUM_OF_TBS) { 3995 IL_ERR("Error can not send more than %d chunks\n", 3996 IL_NUM_OF_TBS); 3997 return -EINVAL; 3998 } 3999 4000 BUG_ON(addr & ~DMA_BIT_MASK(36)); 4001 if (unlikely(addr & ~IL_TX_DMA_MASK)) 4002 IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr); 4003 4004 il4965_tfd_set_tb(tfd, num_tbs, addr, len); 4005 4006 return 0; 4007 } 4008 4009 /* 4010 * Tell nic where to find circular buffer of Tx Frame Descriptors for 4011 * given Tx queue, and enable the DMA channel used for that queue. 4012 * 4013 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA 4014 * channels supported in hardware. 4015 */ 4016 int 4017 il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq) 4018 { 4019 int txq_id = txq->q.id; 4020 4021 /* Circular buffer (TFD queue in DRAM) physical base address */ 4022 il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8); 4023 4024 return 0; 4025 } 4026 4027 /****************************************************************************** 4028 * 4029 * Generic RX handler implementations 4030 * 4031 ******************************************************************************/ 4032 static void 4033 il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb) 4034 { 4035 struct il_rx_pkt *pkt = rxb_addr(rxb); 4036 struct il_alive_resp *palive; 4037 struct delayed_work *pwork; 4038 4039 palive = &pkt->u.alive_frame; 4040 4041 D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n", 4042 palive->is_valid, palive->ver_type, palive->ver_subtype); 4043 4044 if (palive->ver_subtype == INITIALIZE_SUBTYPE) { 4045 D_INFO("Initialization Alive received.\n"); 4046 memcpy(&il->card_alive_init, &pkt->u.alive_frame, 4047 sizeof(struct il_init_alive_resp)); 4048 pwork = &il->init_alive_start; 4049 } else { 4050 D_INFO("Runtime Alive received.\n"); 4051 memcpy(&il->card_alive, &pkt->u.alive_frame, 4052 sizeof(struct il_alive_resp)); 4053 pwork = &il->alive_start; 4054 } 4055 4056 /* We delay the ALIVE response by 5ms to 4057 * give the HW RF Kill time to activate... */ 4058 if (palive->is_valid == UCODE_VALID_OK) 4059 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5)); 4060 else 4061 IL_WARN("uCode did not respond OK.\n"); 4062 } 4063 4064 /** 4065 * il4965_bg_stats_periodic - Timer callback to queue stats 4066 * 4067 * This callback is provided in order to send a stats request. 4068 * 4069 * This timer function is continually reset to execute within 4070 * 60 seconds since the last N_STATS was received. We need to 4071 * ensure we receive the stats in order to update the temperature 4072 * used for calibrating the TXPOWER. 4073 */ 4074 static void 4075 il4965_bg_stats_periodic(unsigned long data) 4076 { 4077 struct il_priv *il = (struct il_priv *)data; 4078 4079 if (test_bit(S_EXIT_PENDING, &il->status)) 4080 return; 4081 4082 /* dont send host command if rf-kill is on */ 4083 if (!il_is_ready_rf(il)) 4084 return; 4085 4086 il_send_stats_request(il, CMD_ASYNC, false); 4087 } 4088 4089 static void 4090 il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb) 4091 { 4092 struct il_rx_pkt *pkt = rxb_addr(rxb); 4093 struct il4965_beacon_notif *beacon = 4094 (struct il4965_beacon_notif *)pkt->u.raw; 4095 #ifdef CONFIG_IWLEGACY_DEBUG 4096 u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); 4097 4098 D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n", 4099 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK, 4100 beacon->beacon_notify_hdr.failure_frame, 4101 le32_to_cpu(beacon->ibss_mgr_status), 4102 le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate); 4103 #endif 4104 il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); 4105 } 4106 4107 static void 4108 il4965_perform_ct_kill_task(struct il_priv *il) 4109 { 4110 unsigned long flags; 4111 4112 D_POWER("Stop all queues\n"); 4113 4114 if (il->mac80211_registered) 4115 ieee80211_stop_queues(il->hw); 4116 4117 _il_wr(il, CSR_UCODE_DRV_GP1_SET, 4118 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); 4119 _il_rd(il, CSR_UCODE_DRV_GP1); 4120 4121 spin_lock_irqsave(&il->reg_lock, flags); 4122 if (likely(_il_grab_nic_access(il))) 4123 _il_release_nic_access(il); 4124 spin_unlock_irqrestore(&il->reg_lock, flags); 4125 } 4126 4127 /* Handle notification from uCode that card's power state is changing 4128 * due to software, hardware, or critical temperature RFKILL */ 4129 static void 4130 il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb) 4131 { 4132 struct il_rx_pkt *pkt = rxb_addr(rxb); 4133 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); 4134 unsigned long status = il->status; 4135 4136 D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n", 4137 (flags & HW_CARD_DISABLED) ? "Kill" : "On", 4138 (flags & SW_CARD_DISABLED) ? "Kill" : "On", 4139 (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached"); 4140 4141 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) { 4142 4143 _il_wr(il, CSR_UCODE_DRV_GP1_SET, 4144 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 4145 4146 il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); 4147 4148 if (!(flags & RXON_CARD_DISABLED)) { 4149 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, 4150 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 4151 il_wr(il, HBUS_TARG_MBX_C, 4152 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); 4153 } 4154 } 4155 4156 if (flags & CT_CARD_DISABLED) 4157 il4965_perform_ct_kill_task(il); 4158 4159 if (flags & HW_CARD_DISABLED) 4160 set_bit(S_RFKILL, &il->status); 4161 else 4162 clear_bit(S_RFKILL, &il->status); 4163 4164 if (!(flags & RXON_CARD_DISABLED)) 4165 il_scan_cancel(il); 4166 4167 if ((test_bit(S_RFKILL, &status) != 4168 test_bit(S_RFKILL, &il->status))) 4169 wiphy_rfkill_set_hw_state(il->hw->wiphy, 4170 test_bit(S_RFKILL, &il->status)); 4171 else 4172 wake_up(&il->wait_command_queue); 4173 } 4174 4175 /** 4176 * il4965_setup_handlers - Initialize Rx handler callbacks 4177 * 4178 * Setup the RX handlers for each of the reply types sent from the uCode 4179 * to the host. 4180 * 4181 * This function chains into the hardware specific files for them to setup 4182 * any hardware specific handlers as well. 4183 */ 4184 static void 4185 il4965_setup_handlers(struct il_priv *il) 4186 { 4187 il->handlers[N_ALIVE] = il4965_hdl_alive; 4188 il->handlers[N_ERROR] = il_hdl_error; 4189 il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa; 4190 il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement; 4191 il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep; 4192 il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats; 4193 il->handlers[N_BEACON] = il4965_hdl_beacon; 4194 4195 /* 4196 * The same handler is used for both the REPLY to a discrete 4197 * stats request from the host as well as for the periodic 4198 * stats notifications (after received beacons) from the uCode. 4199 */ 4200 il->handlers[C_STATS] = il4965_hdl_c_stats; 4201 il->handlers[N_STATS] = il4965_hdl_stats; 4202 4203 il_setup_rx_scan_handlers(il); 4204 4205 /* status change handler */ 4206 il->handlers[N_CARD_STATE] = il4965_hdl_card_state; 4207 4208 il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon; 4209 /* Rx handlers */ 4210 il->handlers[N_RX_PHY] = il4965_hdl_rx_phy; 4211 il->handlers[N_RX_MPDU] = il4965_hdl_rx; 4212 il->handlers[N_RX] = il4965_hdl_rx; 4213 /* block ack */ 4214 il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba; 4215 /* Tx response */ 4216 il->handlers[C_TX] = il4965_hdl_tx; 4217 } 4218 4219 /** 4220 * il4965_rx_handle - Main entry function for receiving responses from uCode 4221 * 4222 * Uses the il->handlers callback function array to invoke 4223 * the appropriate handlers, including command responses, 4224 * frame-received notifications, and other notifications. 4225 */ 4226 void 4227 il4965_rx_handle(struct il_priv *il) 4228 { 4229 struct il_rx_buf *rxb; 4230 struct il_rx_pkt *pkt; 4231 struct il_rx_queue *rxq = &il->rxq; 4232 u32 r, i; 4233 int reclaim; 4234 unsigned long flags; 4235 u8 fill_rx = 0; 4236 u32 count = 8; 4237 int total_empty; 4238 4239 /* uCode's read idx (stored in shared DRAM) indicates the last Rx 4240 * buffer that the driver may process (last buffer filled by ucode). */ 4241 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; 4242 i = rxq->read; 4243 4244 /* Rx interrupt, but nothing sent from uCode */ 4245 if (i == r) 4246 D_RX("r = %d, i = %d\n", r, i); 4247 4248 /* calculate total frames need to be restock after handling RX */ 4249 total_empty = r - rxq->write_actual; 4250 if (total_empty < 0) 4251 total_empty += RX_QUEUE_SIZE; 4252 4253 if (total_empty > (RX_QUEUE_SIZE / 2)) 4254 fill_rx = 1; 4255 4256 while (i != r) { 4257 int len; 4258 4259 rxb = rxq->queue[i]; 4260 4261 /* If an RXB doesn't have a Rx queue slot associated with it, 4262 * then a bug has been introduced in the queue refilling 4263 * routines -- catch it here */ 4264 BUG_ON(rxb == NULL); 4265 4266 rxq->queue[i] = NULL; 4267 4268 pci_unmap_page(il->pci_dev, rxb->page_dma, 4269 PAGE_SIZE << il->hw_params.rx_page_order, 4270 PCI_DMA_FROMDEVICE); 4271 pkt = rxb_addr(rxb); 4272 4273 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK; 4274 len += sizeof(u32); /* account for status word */ 4275 4276 reclaim = il_need_reclaim(il, pkt); 4277 4278 /* Based on type of command response or notification, 4279 * handle those that need handling via function in 4280 * handlers table. See il4965_setup_handlers() */ 4281 if (il->handlers[pkt->hdr.cmd]) { 4282 D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i, 4283 il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); 4284 il->isr_stats.handlers[pkt->hdr.cmd]++; 4285 il->handlers[pkt->hdr.cmd] (il, rxb); 4286 } else { 4287 /* No handling needed */ 4288 D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r, 4289 i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); 4290 } 4291 4292 /* 4293 * XXX: After here, we should always check rxb->page 4294 * against NULL before touching it or its virtual 4295 * memory (pkt). Because some handler might have 4296 * already taken or freed the pages. 4297 */ 4298 4299 if (reclaim) { 4300 /* Invoke any callbacks, transfer the buffer to caller, 4301 * and fire off the (possibly) blocking il_send_cmd() 4302 * as we reclaim the driver command queue */ 4303 if (rxb->page) 4304 il_tx_cmd_complete(il, rxb); 4305 else 4306 IL_WARN("Claim null rxb?\n"); 4307 } 4308 4309 /* Reuse the page if possible. For notification packets and 4310 * SKBs that fail to Rx correctly, add them back into the 4311 * rx_free list for reuse later. */ 4312 spin_lock_irqsave(&rxq->lock, flags); 4313 if (rxb->page != NULL) { 4314 rxb->page_dma = 4315 pci_map_page(il->pci_dev, rxb->page, 0, 4316 PAGE_SIZE << il->hw_params. 4317 rx_page_order, PCI_DMA_FROMDEVICE); 4318 4319 if (unlikely(pci_dma_mapping_error(il->pci_dev, 4320 rxb->page_dma))) { 4321 __il_free_pages(il, rxb->page); 4322 rxb->page = NULL; 4323 list_add_tail(&rxb->list, &rxq->rx_used); 4324 } else { 4325 list_add_tail(&rxb->list, &rxq->rx_free); 4326 rxq->free_count++; 4327 } 4328 } else 4329 list_add_tail(&rxb->list, &rxq->rx_used); 4330 4331 spin_unlock_irqrestore(&rxq->lock, flags); 4332 4333 i = (i + 1) & RX_QUEUE_MASK; 4334 /* If there are a lot of unused frames, 4335 * restock the Rx queue so ucode wont assert. */ 4336 if (fill_rx) { 4337 count++; 4338 if (count >= 8) { 4339 rxq->read = i; 4340 il4965_rx_replenish_now(il); 4341 count = 0; 4342 } 4343 } 4344 } 4345 4346 /* Backtrack one entry */ 4347 rxq->read = i; 4348 if (fill_rx) 4349 il4965_rx_replenish_now(il); 4350 else 4351 il4965_rx_queue_restock(il); 4352 } 4353 4354 /* call this function to flush any scheduled tasklet */ 4355 static inline void 4356 il4965_synchronize_irq(struct il_priv *il) 4357 { 4358 /* wait to make sure we flush pending tasklet */ 4359 synchronize_irq(il->pci_dev->irq); 4360 tasklet_kill(&il->irq_tasklet); 4361 } 4362 4363 static void 4364 il4965_irq_tasklet(struct il_priv *il) 4365 { 4366 u32 inta, handled = 0; 4367 u32 inta_fh; 4368 unsigned long flags; 4369 u32 i; 4370 #ifdef CONFIG_IWLEGACY_DEBUG 4371 u32 inta_mask; 4372 #endif 4373 4374 spin_lock_irqsave(&il->lock, flags); 4375 4376 /* Ack/clear/reset pending uCode interrupts. 4377 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, 4378 * and will clear only when CSR_FH_INT_STATUS gets cleared. */ 4379 inta = _il_rd(il, CSR_INT); 4380 _il_wr(il, CSR_INT, inta); 4381 4382 /* Ack/clear/reset pending flow-handler (DMA) interrupts. 4383 * Any new interrupts that happen after this, either while we're 4384 * in this tasklet, or later, will show up in next ISR/tasklet. */ 4385 inta_fh = _il_rd(il, CSR_FH_INT_STATUS); 4386 _il_wr(il, CSR_FH_INT_STATUS, inta_fh); 4387 4388 #ifdef CONFIG_IWLEGACY_DEBUG 4389 if (il_get_debug_level(il) & IL_DL_ISR) { 4390 /* just for debug */ 4391 inta_mask = _il_rd(il, CSR_INT_MASK); 4392 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, 4393 inta_mask, inta_fh); 4394 } 4395 #endif 4396 4397 spin_unlock_irqrestore(&il->lock, flags); 4398 4399 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not 4400 * atomic, make sure that inta covers all the interrupts that 4401 * we've discovered, even if FH interrupt came in just after 4402 * reading CSR_INT. */ 4403 if (inta_fh & CSR49_FH_INT_RX_MASK) 4404 inta |= CSR_INT_BIT_FH_RX; 4405 if (inta_fh & CSR49_FH_INT_TX_MASK) 4406 inta |= CSR_INT_BIT_FH_TX; 4407 4408 /* Now service all interrupt bits discovered above. */ 4409 if (inta & CSR_INT_BIT_HW_ERR) { 4410 IL_ERR("Hardware error detected. Restarting.\n"); 4411 4412 /* Tell the device to stop sending interrupts */ 4413 il_disable_interrupts(il); 4414 4415 il->isr_stats.hw++; 4416 il_irq_handle_error(il); 4417 4418 handled |= CSR_INT_BIT_HW_ERR; 4419 4420 return; 4421 } 4422 #ifdef CONFIG_IWLEGACY_DEBUG 4423 if (il_get_debug_level(il) & (IL_DL_ISR)) { 4424 /* NIC fires this, but we don't use it, redundant with WAKEUP */ 4425 if (inta & CSR_INT_BIT_SCD) { 4426 D_ISR("Scheduler finished to transmit " 4427 "the frame/frames.\n"); 4428 il->isr_stats.sch++; 4429 } 4430 4431 /* Alive notification via Rx interrupt will do the real work */ 4432 if (inta & CSR_INT_BIT_ALIVE) { 4433 D_ISR("Alive interrupt\n"); 4434 il->isr_stats.alive++; 4435 } 4436 } 4437 #endif 4438 /* Safely ignore these bits for debug checks below */ 4439 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); 4440 4441 /* HW RF KILL switch toggled */ 4442 if (inta & CSR_INT_BIT_RF_KILL) { 4443 int hw_rf_kill = 0; 4444 4445 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) 4446 hw_rf_kill = 1; 4447 4448 IL_WARN("RF_KILL bit toggled to %s.\n", 4449 hw_rf_kill ? "disable radio" : "enable radio"); 4450 4451 il->isr_stats.rfkill++; 4452 4453 /* driver only loads ucode once setting the interface up. 4454 * the driver allows loading the ucode even if the radio 4455 * is killed. Hence update the killswitch state here. The 4456 * rfkill handler will care about restarting if needed. 4457 */ 4458 if (hw_rf_kill) { 4459 set_bit(S_RFKILL, &il->status); 4460 } else { 4461 clear_bit(S_RFKILL, &il->status); 4462 il_force_reset(il, true); 4463 } 4464 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill); 4465 4466 handled |= CSR_INT_BIT_RF_KILL; 4467 } 4468 4469 /* Chip got too hot and stopped itself */ 4470 if (inta & CSR_INT_BIT_CT_KILL) { 4471 IL_ERR("Microcode CT kill error detected.\n"); 4472 il->isr_stats.ctkill++; 4473 handled |= CSR_INT_BIT_CT_KILL; 4474 } 4475 4476 /* Error detected by uCode */ 4477 if (inta & CSR_INT_BIT_SW_ERR) { 4478 IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n", 4479 inta); 4480 il->isr_stats.sw++; 4481 il_irq_handle_error(il); 4482 handled |= CSR_INT_BIT_SW_ERR; 4483 } 4484 4485 /* 4486 * uCode wakes up after power-down sleep. 4487 * Tell device about any new tx or host commands enqueued, 4488 * and about any Rx buffers made available while asleep. 4489 */ 4490 if (inta & CSR_INT_BIT_WAKEUP) { 4491 D_ISR("Wakeup interrupt\n"); 4492 il_rx_queue_update_write_ptr(il, &il->rxq); 4493 for (i = 0; i < il->hw_params.max_txq_num; i++) 4494 il_txq_update_write_ptr(il, &il->txq[i]); 4495 il->isr_stats.wakeup++; 4496 handled |= CSR_INT_BIT_WAKEUP; 4497 } 4498 4499 /* All uCode command responses, including Tx command responses, 4500 * Rx "responses" (frame-received notification), and other 4501 * notifications from uCode come through here*/ 4502 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { 4503 il4965_rx_handle(il); 4504 il->isr_stats.rx++; 4505 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); 4506 } 4507 4508 /* This "Tx" DMA channel is used only for loading uCode */ 4509 if (inta & CSR_INT_BIT_FH_TX) { 4510 D_ISR("uCode load interrupt\n"); 4511 il->isr_stats.tx++; 4512 handled |= CSR_INT_BIT_FH_TX; 4513 /* Wake up uCode load routine, now that load is complete */ 4514 il->ucode_write_complete = 1; 4515 wake_up(&il->wait_command_queue); 4516 } 4517 4518 if (inta & ~handled) { 4519 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled); 4520 il->isr_stats.unhandled++; 4521 } 4522 4523 if (inta & ~(il->inta_mask)) { 4524 IL_WARN("Disabled INTA bits 0x%08x were pending\n", 4525 inta & ~il->inta_mask); 4526 IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh); 4527 } 4528 4529 /* Re-enable all interrupts */ 4530 /* only Re-enable if disabled by irq */ 4531 if (test_bit(S_INT_ENABLED, &il->status)) 4532 il_enable_interrupts(il); 4533 /* Re-enable RF_KILL if it occurred */ 4534 else if (handled & CSR_INT_BIT_RF_KILL) 4535 il_enable_rfkill_int(il); 4536 4537 #ifdef CONFIG_IWLEGACY_DEBUG 4538 if (il_get_debug_level(il) & (IL_DL_ISR)) { 4539 inta = _il_rd(il, CSR_INT); 4540 inta_mask = _il_rd(il, CSR_INT_MASK); 4541 inta_fh = _il_rd(il, CSR_FH_INT_STATUS); 4542 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " 4543 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); 4544 } 4545 #endif 4546 } 4547 4548 /***************************************************************************** 4549 * 4550 * sysfs attributes 4551 * 4552 *****************************************************************************/ 4553 4554 #ifdef CONFIG_IWLEGACY_DEBUG 4555 4556 /* 4557 * The following adds a new attribute to the sysfs representation 4558 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/) 4559 * used for controlling the debug level. 4560 * 4561 * See the level definitions in iwl for details. 4562 * 4563 * The debug_level being managed using sysfs below is a per device debug 4564 * level that is used instead of the global debug level if it (the per 4565 * device debug level) is set. 4566 */ 4567 static ssize_t 4568 il4965_show_debug_level(struct device *d, struct device_attribute *attr, 4569 char *buf) 4570 { 4571 struct il_priv *il = dev_get_drvdata(d); 4572 return sprintf(buf, "0x%08X\n", il_get_debug_level(il)); 4573 } 4574 4575 static ssize_t 4576 il4965_store_debug_level(struct device *d, struct device_attribute *attr, 4577 const char *buf, size_t count) 4578 { 4579 struct il_priv *il = dev_get_drvdata(d); 4580 unsigned long val; 4581 int ret; 4582 4583 ret = kstrtoul(buf, 0, &val); 4584 if (ret) 4585 IL_ERR("%s is not in hex or decimal form.\n", buf); 4586 else 4587 il->debug_level = val; 4588 4589 return strnlen(buf, count); 4590 } 4591 4592 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO, il4965_show_debug_level, 4593 il4965_store_debug_level); 4594 4595 #endif /* CONFIG_IWLEGACY_DEBUG */ 4596 4597 static ssize_t 4598 il4965_show_temperature(struct device *d, struct device_attribute *attr, 4599 char *buf) 4600 { 4601 struct il_priv *il = dev_get_drvdata(d); 4602 4603 if (!il_is_alive(il)) 4604 return -EAGAIN; 4605 4606 return sprintf(buf, "%d\n", il->temperature); 4607 } 4608 4609 static DEVICE_ATTR(temperature, S_IRUGO, il4965_show_temperature, NULL); 4610 4611 static ssize_t 4612 il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf) 4613 { 4614 struct il_priv *il = dev_get_drvdata(d); 4615 4616 if (!il_is_ready_rf(il)) 4617 return sprintf(buf, "off\n"); 4618 else 4619 return sprintf(buf, "%d\n", il->tx_power_user_lmt); 4620 } 4621 4622 static ssize_t 4623 il4965_store_tx_power(struct device *d, struct device_attribute *attr, 4624 const char *buf, size_t count) 4625 { 4626 struct il_priv *il = dev_get_drvdata(d); 4627 unsigned long val; 4628 int ret; 4629 4630 ret = kstrtoul(buf, 10, &val); 4631 if (ret) 4632 IL_INFO("%s is not in decimal form.\n", buf); 4633 else { 4634 ret = il_set_tx_power(il, val, false); 4635 if (ret) 4636 IL_ERR("failed setting tx power (0x%08x).\n", ret); 4637 else 4638 ret = count; 4639 } 4640 return ret; 4641 } 4642 4643 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, il4965_show_tx_power, 4644 il4965_store_tx_power); 4645 4646 static struct attribute *il_sysfs_entries[] = { 4647 &dev_attr_temperature.attr, 4648 &dev_attr_tx_power.attr, 4649 #ifdef CONFIG_IWLEGACY_DEBUG 4650 &dev_attr_debug_level.attr, 4651 #endif 4652 NULL 4653 }; 4654 4655 static struct attribute_group il_attribute_group = { 4656 .name = NULL, /* put in device directory */ 4657 .attrs = il_sysfs_entries, 4658 }; 4659 4660 /****************************************************************************** 4661 * 4662 * uCode download functions 4663 * 4664 ******************************************************************************/ 4665 4666 static void 4667 il4965_dealloc_ucode_pci(struct il_priv *il) 4668 { 4669 il_free_fw_desc(il->pci_dev, &il->ucode_code); 4670 il_free_fw_desc(il->pci_dev, &il->ucode_data); 4671 il_free_fw_desc(il->pci_dev, &il->ucode_data_backup); 4672 il_free_fw_desc(il->pci_dev, &il->ucode_init); 4673 il_free_fw_desc(il->pci_dev, &il->ucode_init_data); 4674 il_free_fw_desc(il->pci_dev, &il->ucode_boot); 4675 } 4676 4677 static void 4678 il4965_nic_start(struct il_priv *il) 4679 { 4680 /* Remove all resets to allow NIC to operate */ 4681 _il_wr(il, CSR_RESET, 0); 4682 } 4683 4684 static void il4965_ucode_callback(const struct firmware *ucode_raw, 4685 void *context); 4686 static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length); 4687 4688 static int __must_check 4689 il4965_request_firmware(struct il_priv *il, bool first) 4690 { 4691 const char *name_pre = il->cfg->fw_name_pre; 4692 char tag[8]; 4693 4694 if (first) { 4695 il->fw_idx = il->cfg->ucode_api_max; 4696 sprintf(tag, "%d", il->fw_idx); 4697 } else { 4698 il->fw_idx--; 4699 sprintf(tag, "%d", il->fw_idx); 4700 } 4701 4702 if (il->fw_idx < il->cfg->ucode_api_min) { 4703 IL_ERR("no suitable firmware found!\n"); 4704 return -ENOENT; 4705 } 4706 4707 sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode"); 4708 4709 D_INFO("attempting to load firmware '%s'\n", il->firmware_name); 4710 4711 return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name, 4712 &il->pci_dev->dev, GFP_KERNEL, il, 4713 il4965_ucode_callback); 4714 } 4715 4716 struct il4965_firmware_pieces { 4717 const void *inst, *data, *init, *init_data, *boot; 4718 size_t inst_size, data_size, init_size, init_data_size, boot_size; 4719 }; 4720 4721 static int 4722 il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw, 4723 struct il4965_firmware_pieces *pieces) 4724 { 4725 struct il_ucode_header *ucode = (void *)ucode_raw->data; 4726 u32 api_ver, hdr_size; 4727 const u8 *src; 4728 4729 il->ucode_ver = le32_to_cpu(ucode->ver); 4730 api_ver = IL_UCODE_API(il->ucode_ver); 4731 4732 switch (api_ver) { 4733 default: 4734 case 0: 4735 case 1: 4736 case 2: 4737 hdr_size = 24; 4738 if (ucode_raw->size < hdr_size) { 4739 IL_ERR("File size too small!\n"); 4740 return -EINVAL; 4741 } 4742 pieces->inst_size = le32_to_cpu(ucode->v1.inst_size); 4743 pieces->data_size = le32_to_cpu(ucode->v1.data_size); 4744 pieces->init_size = le32_to_cpu(ucode->v1.init_size); 4745 pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size); 4746 pieces->boot_size = le32_to_cpu(ucode->v1.boot_size); 4747 src = ucode->v1.data; 4748 break; 4749 } 4750 4751 /* Verify size of file vs. image size info in file's header */ 4752 if (ucode_raw->size != 4753 hdr_size + pieces->inst_size + pieces->data_size + 4754 pieces->init_size + pieces->init_data_size + pieces->boot_size) { 4755 4756 IL_ERR("uCode file size %d does not match expected size\n", 4757 (int)ucode_raw->size); 4758 return -EINVAL; 4759 } 4760 4761 pieces->inst = src; 4762 src += pieces->inst_size; 4763 pieces->data = src; 4764 src += pieces->data_size; 4765 pieces->init = src; 4766 src += pieces->init_size; 4767 pieces->init_data = src; 4768 src += pieces->init_data_size; 4769 pieces->boot = src; 4770 src += pieces->boot_size; 4771 4772 return 0; 4773 } 4774 4775 /** 4776 * il4965_ucode_callback - callback when firmware was loaded 4777 * 4778 * If loaded successfully, copies the firmware into buffers 4779 * for the card to fetch (via DMA). 4780 */ 4781 static void 4782 il4965_ucode_callback(const struct firmware *ucode_raw, void *context) 4783 { 4784 struct il_priv *il = context; 4785 struct il_ucode_header *ucode; 4786 int err; 4787 struct il4965_firmware_pieces pieces; 4788 const unsigned int api_max = il->cfg->ucode_api_max; 4789 const unsigned int api_min = il->cfg->ucode_api_min; 4790 u32 api_ver; 4791 4792 u32 max_probe_length = 200; 4793 u32 standard_phy_calibration_size = 4794 IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE; 4795 4796 memset(&pieces, 0, sizeof(pieces)); 4797 4798 if (!ucode_raw) { 4799 if (il->fw_idx <= il->cfg->ucode_api_max) 4800 IL_ERR("request for firmware file '%s' failed.\n", 4801 il->firmware_name); 4802 goto try_again; 4803 } 4804 4805 D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name, 4806 ucode_raw->size); 4807 4808 /* Make sure that we got at least the API version number */ 4809 if (ucode_raw->size < 4) { 4810 IL_ERR("File size way too small!\n"); 4811 goto try_again; 4812 } 4813 4814 /* Data from ucode file: header followed by uCode images */ 4815 ucode = (struct il_ucode_header *)ucode_raw->data; 4816 4817 err = il4965_load_firmware(il, ucode_raw, &pieces); 4818 4819 if (err) 4820 goto try_again; 4821 4822 api_ver = IL_UCODE_API(il->ucode_ver); 4823 4824 /* 4825 * api_ver should match the api version forming part of the 4826 * firmware filename ... but we don't check for that and only rely 4827 * on the API version read from firmware header from here on forward 4828 */ 4829 if (api_ver < api_min || api_ver > api_max) { 4830 IL_ERR("Driver unable to support your firmware API. " 4831 "Driver supports v%u, firmware is v%u.\n", api_max, 4832 api_ver); 4833 goto try_again; 4834 } 4835 4836 if (api_ver != api_max) 4837 IL_ERR("Firmware has old API version. Expected v%u, " 4838 "got v%u. New firmware can be obtained " 4839 "from http://www.intellinuxwireless.org.\n", api_max, 4840 api_ver); 4841 4842 IL_INFO("loaded firmware version %u.%u.%u.%u\n", 4843 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver), 4844 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver)); 4845 4846 snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version), 4847 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver), 4848 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver), 4849 IL_UCODE_SERIAL(il->ucode_ver)); 4850 4851 /* 4852 * For any of the failures below (before allocating pci memory) 4853 * we will try to load a version with a smaller API -- maybe the 4854 * user just got a corrupted version of the latest API. 4855 */ 4856 4857 D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver); 4858 D_INFO("f/w package hdr runtime inst size = %Zd\n", pieces.inst_size); 4859 D_INFO("f/w package hdr runtime data size = %Zd\n", pieces.data_size); 4860 D_INFO("f/w package hdr init inst size = %Zd\n", pieces.init_size); 4861 D_INFO("f/w package hdr init data size = %Zd\n", pieces.init_data_size); 4862 D_INFO("f/w package hdr boot inst size = %Zd\n", pieces.boot_size); 4863 4864 /* Verify that uCode images will fit in card's SRAM */ 4865 if (pieces.inst_size > il->hw_params.max_inst_size) { 4866 IL_ERR("uCode instr len %Zd too large to fit in\n", 4867 pieces.inst_size); 4868 goto try_again; 4869 } 4870 4871 if (pieces.data_size > il->hw_params.max_data_size) { 4872 IL_ERR("uCode data len %Zd too large to fit in\n", 4873 pieces.data_size); 4874 goto try_again; 4875 } 4876 4877 if (pieces.init_size > il->hw_params.max_inst_size) { 4878 IL_ERR("uCode init instr len %Zd too large to fit in\n", 4879 pieces.init_size); 4880 goto try_again; 4881 } 4882 4883 if (pieces.init_data_size > il->hw_params.max_data_size) { 4884 IL_ERR("uCode init data len %Zd too large to fit in\n", 4885 pieces.init_data_size); 4886 goto try_again; 4887 } 4888 4889 if (pieces.boot_size > il->hw_params.max_bsm_size) { 4890 IL_ERR("uCode boot instr len %Zd too large to fit in\n", 4891 pieces.boot_size); 4892 goto try_again; 4893 } 4894 4895 /* Allocate ucode buffers for card's bus-master loading ... */ 4896 4897 /* Runtime instructions and 2 copies of data: 4898 * 1) unmodified from disk 4899 * 2) backup cache for save/restore during power-downs */ 4900 il->ucode_code.len = pieces.inst_size; 4901 il_alloc_fw_desc(il->pci_dev, &il->ucode_code); 4902 4903 il->ucode_data.len = pieces.data_size; 4904 il_alloc_fw_desc(il->pci_dev, &il->ucode_data); 4905 4906 il->ucode_data_backup.len = pieces.data_size; 4907 il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup); 4908 4909 if (!il->ucode_code.v_addr || !il->ucode_data.v_addr || 4910 !il->ucode_data_backup.v_addr) 4911 goto err_pci_alloc; 4912 4913 /* Initialization instructions and data */ 4914 if (pieces.init_size && pieces.init_data_size) { 4915 il->ucode_init.len = pieces.init_size; 4916 il_alloc_fw_desc(il->pci_dev, &il->ucode_init); 4917 4918 il->ucode_init_data.len = pieces.init_data_size; 4919 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data); 4920 4921 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr) 4922 goto err_pci_alloc; 4923 } 4924 4925 /* Bootstrap (instructions only, no data) */ 4926 if (pieces.boot_size) { 4927 il->ucode_boot.len = pieces.boot_size; 4928 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot); 4929 4930 if (!il->ucode_boot.v_addr) 4931 goto err_pci_alloc; 4932 } 4933 4934 /* Now that we can no longer fail, copy information */ 4935 4936 il->sta_key_max_num = STA_KEY_MAX_NUM; 4937 4938 /* Copy images into buffers for card's bus-master reads ... */ 4939 4940 /* Runtime instructions (first block of data in file) */ 4941 D_INFO("Copying (but not loading) uCode instr len %Zd\n", 4942 pieces.inst_size); 4943 memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size); 4944 4945 D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", 4946 il->ucode_code.v_addr, (u32) il->ucode_code.p_addr); 4947 4948 /* 4949 * Runtime data 4950 * NOTE: Copy into backup buffer will be done in il_up() 4951 */ 4952 D_INFO("Copying (but not loading) uCode data len %Zd\n", 4953 pieces.data_size); 4954 memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size); 4955 memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size); 4956 4957 /* Initialization instructions */ 4958 if (pieces.init_size) { 4959 D_INFO("Copying (but not loading) init instr len %Zd\n", 4960 pieces.init_size); 4961 memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size); 4962 } 4963 4964 /* Initialization data */ 4965 if (pieces.init_data_size) { 4966 D_INFO("Copying (but not loading) init data len %Zd\n", 4967 pieces.init_data_size); 4968 memcpy(il->ucode_init_data.v_addr, pieces.init_data, 4969 pieces.init_data_size); 4970 } 4971 4972 /* Bootstrap instructions */ 4973 D_INFO("Copying (but not loading) boot instr len %Zd\n", 4974 pieces.boot_size); 4975 memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size); 4976 4977 /* 4978 * figure out the offset of chain noise reset and gain commands 4979 * base on the size of standard phy calibration commands table size 4980 */ 4981 il->_4965.phy_calib_chain_noise_reset_cmd = 4982 standard_phy_calibration_size; 4983 il->_4965.phy_calib_chain_noise_gain_cmd = 4984 standard_phy_calibration_size + 1; 4985 4986 /************************************************** 4987 * This is still part of probe() in a sense... 4988 * 4989 * 9. Setup and register with mac80211 and debugfs 4990 **************************************************/ 4991 err = il4965_mac_setup_register(il, max_probe_length); 4992 if (err) 4993 goto out_unbind; 4994 4995 err = il_dbgfs_register(il, DRV_NAME); 4996 if (err) 4997 IL_ERR("failed to create debugfs files. Ignoring error: %d\n", 4998 err); 4999 5000 err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group); 5001 if (err) { 5002 IL_ERR("failed to create sysfs device attributes\n"); 5003 goto out_unbind; 5004 } 5005 5006 /* We have our copies now, allow OS release its copies */ 5007 release_firmware(ucode_raw); 5008 complete(&il->_4965.firmware_loading_complete); 5009 return; 5010 5011 try_again: 5012 /* try next, if any */ 5013 if (il4965_request_firmware(il, false)) 5014 goto out_unbind; 5015 release_firmware(ucode_raw); 5016 return; 5017 5018 err_pci_alloc: 5019 IL_ERR("failed to allocate pci memory\n"); 5020 il4965_dealloc_ucode_pci(il); 5021 out_unbind: 5022 complete(&il->_4965.firmware_loading_complete); 5023 device_release_driver(&il->pci_dev->dev); 5024 release_firmware(ucode_raw); 5025 } 5026 5027 static const char *const desc_lookup_text[] = { 5028 "OK", 5029 "FAIL", 5030 "BAD_PARAM", 5031 "BAD_CHECKSUM", 5032 "NMI_INTERRUPT_WDG", 5033 "SYSASSERT", 5034 "FATAL_ERROR", 5035 "BAD_COMMAND", 5036 "HW_ERROR_TUNE_LOCK", 5037 "HW_ERROR_TEMPERATURE", 5038 "ILLEGAL_CHAN_FREQ", 5039 "VCC_NOT_STBL", 5040 "FH49_ERROR", 5041 "NMI_INTERRUPT_HOST", 5042 "NMI_INTERRUPT_ACTION_PT", 5043 "NMI_INTERRUPT_UNKNOWN", 5044 "UCODE_VERSION_MISMATCH", 5045 "HW_ERROR_ABS_LOCK", 5046 "HW_ERROR_CAL_LOCK_FAIL", 5047 "NMI_INTERRUPT_INST_ACTION_PT", 5048 "NMI_INTERRUPT_DATA_ACTION_PT", 5049 "NMI_TRM_HW_ER", 5050 "NMI_INTERRUPT_TRM", 5051 "NMI_INTERRUPT_BREAK_POINT", 5052 "DEBUG_0", 5053 "DEBUG_1", 5054 "DEBUG_2", 5055 "DEBUG_3", 5056 }; 5057 5058 static struct { 5059 char *name; 5060 u8 num; 5061 } advanced_lookup[] = { 5062 { 5063 "NMI_INTERRUPT_WDG", 0x34}, { 5064 "SYSASSERT", 0x35}, { 5065 "UCODE_VERSION_MISMATCH", 0x37}, { 5066 "BAD_COMMAND", 0x38}, { 5067 "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, { 5068 "FATAL_ERROR", 0x3D}, { 5069 "NMI_TRM_HW_ERR", 0x46}, { 5070 "NMI_INTERRUPT_TRM", 0x4C}, { 5071 "NMI_INTERRUPT_BREAK_POINT", 0x54}, { 5072 "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, { 5073 "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, { 5074 "NMI_INTERRUPT_HOST", 0x66}, { 5075 "NMI_INTERRUPT_ACTION_PT", 0x7C}, { 5076 "NMI_INTERRUPT_UNKNOWN", 0x84}, { 5077 "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, { 5078 "ADVANCED_SYSASSERT", 0},}; 5079 5080 static const char * 5081 il4965_desc_lookup(u32 num) 5082 { 5083 int i; 5084 int max = ARRAY_SIZE(desc_lookup_text); 5085 5086 if (num < max) 5087 return desc_lookup_text[num]; 5088 5089 max = ARRAY_SIZE(advanced_lookup) - 1; 5090 for (i = 0; i < max; i++) { 5091 if (advanced_lookup[i].num == num) 5092 break; 5093 } 5094 return advanced_lookup[i].name; 5095 } 5096 5097 #define ERROR_START_OFFSET (1 * sizeof(u32)) 5098 #define ERROR_ELEM_SIZE (7 * sizeof(u32)) 5099 5100 void 5101 il4965_dump_nic_error_log(struct il_priv *il) 5102 { 5103 u32 data2, line; 5104 u32 desc, time, count, base, data1; 5105 u32 blink1, blink2, ilink1, ilink2; 5106 u32 pc, hcmd; 5107 5108 if (il->ucode_type == UCODE_INIT) 5109 base = le32_to_cpu(il->card_alive_init.error_event_table_ptr); 5110 else 5111 base = le32_to_cpu(il->card_alive.error_event_table_ptr); 5112 5113 if (!il->ops->is_valid_rtc_data_addr(base)) { 5114 IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n", 5115 base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT"); 5116 return; 5117 } 5118 5119 count = il_read_targ_mem(il, base); 5120 5121 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { 5122 IL_ERR("Start IWL Error Log Dump:\n"); 5123 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count); 5124 } 5125 5126 desc = il_read_targ_mem(il, base + 1 * sizeof(u32)); 5127 il->isr_stats.err_code = desc; 5128 pc = il_read_targ_mem(il, base + 2 * sizeof(u32)); 5129 blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32)); 5130 blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32)); 5131 ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32)); 5132 ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32)); 5133 data1 = il_read_targ_mem(il, base + 7 * sizeof(u32)); 5134 data2 = il_read_targ_mem(il, base + 8 * sizeof(u32)); 5135 line = il_read_targ_mem(il, base + 9 * sizeof(u32)); 5136 time = il_read_targ_mem(il, base + 11 * sizeof(u32)); 5137 hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32)); 5138 5139 IL_ERR("Desc Time " 5140 "data1 data2 line\n"); 5141 IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n", 5142 il4965_desc_lookup(desc), desc, time, data1, data2, line); 5143 IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n"); 5144 IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1, 5145 blink2, ilink1, ilink2, hcmd); 5146 } 5147 5148 static void 5149 il4965_rf_kill_ct_config(struct il_priv *il) 5150 { 5151 struct il_ct_kill_config cmd; 5152 unsigned long flags; 5153 int ret = 0; 5154 5155 spin_lock_irqsave(&il->lock, flags); 5156 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, 5157 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); 5158 spin_unlock_irqrestore(&il->lock, flags); 5159 5160 cmd.critical_temperature_R = 5161 cpu_to_le32(il->hw_params.ct_kill_threshold); 5162 5163 ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd); 5164 if (ret) 5165 IL_ERR("C_CT_KILL_CONFIG failed\n"); 5166 else 5167 D_INFO("C_CT_KILL_CONFIG " "succeeded, " 5168 "critical temperature is %d\n", 5169 il->hw_params.ct_kill_threshold); 5170 } 5171 5172 static const s8 default_queue_to_tx_fifo[] = { 5173 IL_TX_FIFO_VO, 5174 IL_TX_FIFO_VI, 5175 IL_TX_FIFO_BE, 5176 IL_TX_FIFO_BK, 5177 IL49_CMD_FIFO_NUM, 5178 IL_TX_FIFO_UNUSED, 5179 IL_TX_FIFO_UNUSED, 5180 }; 5181 5182 #define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) 5183 5184 static int 5185 il4965_alive_notify(struct il_priv *il) 5186 { 5187 u32 a; 5188 unsigned long flags; 5189 int i, chan; 5190 u32 reg_val; 5191 5192 spin_lock_irqsave(&il->lock, flags); 5193 5194 /* Clear 4965's internal Tx Scheduler data base */ 5195 il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR); 5196 a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET; 5197 for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4) 5198 il_write_targ_mem(il, a, 0); 5199 for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4) 5200 il_write_targ_mem(il, a, 0); 5201 for (; 5202 a < 5203 il->scd_base_addr + 5204 IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num); 5205 a += 4) 5206 il_write_targ_mem(il, a, 0); 5207 5208 /* Tel 4965 where to find Tx byte count tables */ 5209 il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10); 5210 5211 /* Enable DMA channel */ 5212 for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++) 5213 il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan), 5214 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | 5215 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); 5216 5217 /* Update FH chicken bits */ 5218 reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG); 5219 il_wr(il, FH49_TX_CHICKEN_BITS_REG, 5220 reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); 5221 5222 /* Disable chain mode for all queues */ 5223 il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0); 5224 5225 /* Initialize each Tx queue (including the command queue) */ 5226 for (i = 0; i < il->hw_params.max_txq_num; i++) { 5227 5228 /* TFD circular buffer read/write idxes */ 5229 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0); 5230 il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8)); 5231 5232 /* Max Tx Window size for Scheduler-ACK mode */ 5233 il_write_targ_mem(il, 5234 il->scd_base_addr + 5235 IL49_SCD_CONTEXT_QUEUE_OFFSET(i), 5236 (SCD_WIN_SIZE << 5237 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & 5238 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); 5239 5240 /* Frame limit */ 5241 il_write_targ_mem(il, 5242 il->scd_base_addr + 5243 IL49_SCD_CONTEXT_QUEUE_OFFSET(i) + 5244 sizeof(u32), 5245 (SCD_FRAME_LIMIT << 5246 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & 5247 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); 5248 5249 } 5250 il_wr_prph(il, IL49_SCD_INTERRUPT_MASK, 5251 (1 << il->hw_params.max_txq_num) - 1); 5252 5253 /* Activate all Tx DMA/FIFO channels */ 5254 il4965_txq_set_sched(il, IL_MASK(0, 6)); 5255 5256 il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0); 5257 5258 /* make sure all queue are not stopped */ 5259 memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped)); 5260 for (i = 0; i < 4; i++) 5261 atomic_set(&il->queue_stop_count[i], 0); 5262 5263 /* reset to 0 to enable all the queue first */ 5264 il->txq_ctx_active_msk = 0; 5265 /* Map each Tx/cmd queue to its corresponding fifo */ 5266 BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7); 5267 5268 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) { 5269 int ac = default_queue_to_tx_fifo[i]; 5270 5271 il_txq_ctx_activate(il, i); 5272 5273 if (ac == IL_TX_FIFO_UNUSED) 5274 continue; 5275 5276 il4965_tx_queue_set_status(il, &il->txq[i], ac, 0); 5277 } 5278 5279 spin_unlock_irqrestore(&il->lock, flags); 5280 5281 return 0; 5282 } 5283 5284 /** 5285 * il4965_alive_start - called after N_ALIVE notification received 5286 * from protocol/runtime uCode (initialization uCode's 5287 * Alive gets handled by il_init_alive_start()). 5288 */ 5289 static void 5290 il4965_alive_start(struct il_priv *il) 5291 { 5292 int ret = 0; 5293 5294 D_INFO("Runtime Alive received.\n"); 5295 5296 if (il->card_alive.is_valid != UCODE_VALID_OK) { 5297 /* We had an error bringing up the hardware, so take it 5298 * all the way back down so we can try again */ 5299 D_INFO("Alive failed.\n"); 5300 goto restart; 5301 } 5302 5303 /* Initialize uCode has loaded Runtime uCode ... verify inst image. 5304 * This is a paranoid check, because we would not have gotten the 5305 * "runtime" alive if code weren't properly loaded. */ 5306 if (il4965_verify_ucode(il)) { 5307 /* Runtime instruction load was bad; 5308 * take it all the way back down so we can try again */ 5309 D_INFO("Bad runtime uCode load.\n"); 5310 goto restart; 5311 } 5312 5313 ret = il4965_alive_notify(il); 5314 if (ret) { 5315 IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret); 5316 goto restart; 5317 } 5318 5319 /* After the ALIVE response, we can send host commands to the uCode */ 5320 set_bit(S_ALIVE, &il->status); 5321 5322 /* Enable watchdog to monitor the driver tx queues */ 5323 il_setup_watchdog(il); 5324 5325 if (il_is_rfkill(il)) 5326 return; 5327 5328 ieee80211_wake_queues(il->hw); 5329 5330 il->active_rate = RATES_MASK; 5331 5332 il_power_update_mode(il, true); 5333 D_INFO("Updated power mode\n"); 5334 5335 if (il_is_associated(il)) { 5336 struct il_rxon_cmd *active_rxon = 5337 (struct il_rxon_cmd *)&il->active; 5338 /* apply any changes in staging */ 5339 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; 5340 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; 5341 } else { 5342 /* Initialize our rx_config data */ 5343 il_connection_init_rx_config(il); 5344 5345 if (il->ops->set_rxon_chain) 5346 il->ops->set_rxon_chain(il); 5347 } 5348 5349 /* Configure bluetooth coexistence if enabled */ 5350 il_send_bt_config(il); 5351 5352 il4965_reset_run_time_calib(il); 5353 5354 set_bit(S_READY, &il->status); 5355 5356 /* Configure the adapter for unassociated operation */ 5357 il_commit_rxon(il); 5358 5359 /* At this point, the NIC is initialized and operational */ 5360 il4965_rf_kill_ct_config(il); 5361 5362 D_INFO("ALIVE processing complete.\n"); 5363 wake_up(&il->wait_command_queue); 5364 5365 return; 5366 5367 restart: 5368 queue_work(il->workqueue, &il->restart); 5369 } 5370 5371 static void il4965_cancel_deferred_work(struct il_priv *il); 5372 5373 static void 5374 __il4965_down(struct il_priv *il) 5375 { 5376 unsigned long flags; 5377 int exit_pending; 5378 5379 D_INFO(DRV_NAME " is going down\n"); 5380 5381 il_scan_cancel_timeout(il, 200); 5382 5383 exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status); 5384 5385 /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set 5386 * to prevent rearm timer */ 5387 del_timer_sync(&il->watchdog); 5388 5389 il_clear_ucode_stations(il); 5390 5391 /* FIXME: race conditions ? */ 5392 spin_lock_irq(&il->sta_lock); 5393 /* 5394 * Remove all key information that is not stored as part 5395 * of station information since mac80211 may not have had 5396 * a chance to remove all the keys. When device is 5397 * reconfigured by mac80211 after an error all keys will 5398 * be reconfigured. 5399 */ 5400 memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys)); 5401 il->_4965.key_mapping_keys = 0; 5402 spin_unlock_irq(&il->sta_lock); 5403 5404 il_dealloc_bcast_stations(il); 5405 il_clear_driver_stations(il); 5406 5407 /* Unblock any waiting calls */ 5408 wake_up_all(&il->wait_command_queue); 5409 5410 /* Wipe out the EXIT_PENDING status bit if we are not actually 5411 * exiting the module */ 5412 if (!exit_pending) 5413 clear_bit(S_EXIT_PENDING, &il->status); 5414 5415 /* stop and reset the on-board processor */ 5416 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); 5417 5418 /* tell the device to stop sending interrupts */ 5419 spin_lock_irqsave(&il->lock, flags); 5420 il_disable_interrupts(il); 5421 spin_unlock_irqrestore(&il->lock, flags); 5422 il4965_synchronize_irq(il); 5423 5424 if (il->mac80211_registered) 5425 ieee80211_stop_queues(il->hw); 5426 5427 /* If we have not previously called il_init() then 5428 * clear all bits but the RF Kill bit and return */ 5429 if (!il_is_init(il)) { 5430 il->status = 5431 test_bit(S_RFKILL, &il->status) << S_RFKILL | 5432 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | 5433 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; 5434 goto exit; 5435 } 5436 5437 /* ...otherwise clear out all the status bits but the RF Kill 5438 * bit and continue taking the NIC down. */ 5439 il->status &= 5440 test_bit(S_RFKILL, &il->status) << S_RFKILL | 5441 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | 5442 test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR | 5443 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; 5444 5445 /* 5446 * We disabled and synchronized interrupt, and priv->mutex is taken, so 5447 * here is the only thread which will program device registers, but 5448 * still have lockdep assertions, so we are taking reg_lock. 5449 */ 5450 spin_lock_irq(&il->reg_lock); 5451 /* FIXME: il_grab_nic_access if rfkill is off ? */ 5452 5453 il4965_txq_ctx_stop(il); 5454 il4965_rxq_stop(il); 5455 /* Power-down device's busmaster DMA clocks */ 5456 _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); 5457 udelay(5); 5458 /* Make sure (redundant) we've released our request to stay awake */ 5459 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 5460 /* Stop the device, and put it in low power state */ 5461 _il_apm_stop(il); 5462 5463 spin_unlock_irq(&il->reg_lock); 5464 5465 il4965_txq_ctx_unmap(il); 5466 exit: 5467 memset(&il->card_alive, 0, sizeof(struct il_alive_resp)); 5468 5469 dev_kfree_skb(il->beacon_skb); 5470 il->beacon_skb = NULL; 5471 5472 /* clear out any free frames */ 5473 il4965_clear_free_frames(il); 5474 } 5475 5476 static void 5477 il4965_down(struct il_priv *il) 5478 { 5479 mutex_lock(&il->mutex); 5480 __il4965_down(il); 5481 mutex_unlock(&il->mutex); 5482 5483 il4965_cancel_deferred_work(il); 5484 } 5485 5486 5487 static void 5488 il4965_set_hw_ready(struct il_priv *il) 5489 { 5490 int ret; 5491 5492 il_set_bit(il, CSR_HW_IF_CONFIG_REG, 5493 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); 5494 5495 /* See if we got it */ 5496 ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, 5497 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 5498 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 5499 100); 5500 if (ret >= 0) 5501 il->hw_ready = true; 5502 5503 D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not"); 5504 } 5505 5506 static void 5507 il4965_prepare_card_hw(struct il_priv *il) 5508 { 5509 int ret; 5510 5511 il->hw_ready = false; 5512 5513 il4965_set_hw_ready(il); 5514 if (il->hw_ready) 5515 return; 5516 5517 /* If HW is not ready, prepare the conditions to check again */ 5518 il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE); 5519 5520 ret = 5521 _il_poll_bit(il, CSR_HW_IF_CONFIG_REG, 5522 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 5523 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000); 5524 5525 /* HW should be ready by now, check again. */ 5526 if (ret != -ETIMEDOUT) 5527 il4965_set_hw_ready(il); 5528 } 5529 5530 #define MAX_HW_RESTARTS 5 5531 5532 static int 5533 __il4965_up(struct il_priv *il) 5534 { 5535 int i; 5536 int ret; 5537 5538 if (test_bit(S_EXIT_PENDING, &il->status)) { 5539 IL_WARN("Exit pending; will not bring the NIC up\n"); 5540 return -EIO; 5541 } 5542 5543 if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) { 5544 IL_ERR("ucode not available for device bringup\n"); 5545 return -EIO; 5546 } 5547 5548 ret = il4965_alloc_bcast_station(il); 5549 if (ret) { 5550 il_dealloc_bcast_stations(il); 5551 return ret; 5552 } 5553 5554 il4965_prepare_card_hw(il); 5555 if (!il->hw_ready) { 5556 il_dealloc_bcast_stations(il); 5557 IL_ERR("HW not ready\n"); 5558 return -EIO; 5559 } 5560 5561 /* If platform's RF_KILL switch is NOT set to KILL */ 5562 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) 5563 clear_bit(S_RFKILL, &il->status); 5564 else { 5565 set_bit(S_RFKILL, &il->status); 5566 wiphy_rfkill_set_hw_state(il->hw->wiphy, true); 5567 5568 il_dealloc_bcast_stations(il); 5569 il_enable_rfkill_int(il); 5570 IL_WARN("Radio disabled by HW RF Kill switch\n"); 5571 return 0; 5572 } 5573 5574 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5575 5576 /* must be initialised before il_hw_nic_init */ 5577 il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM; 5578 5579 ret = il4965_hw_nic_init(il); 5580 if (ret) { 5581 IL_ERR("Unable to init nic\n"); 5582 il_dealloc_bcast_stations(il); 5583 return ret; 5584 } 5585 5586 /* make sure rfkill handshake bits are cleared */ 5587 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5588 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 5589 5590 /* clear (again), then enable host interrupts */ 5591 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5592 il_enable_interrupts(il); 5593 5594 /* really make sure rfkill handshake bits are cleared */ 5595 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5596 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 5597 5598 /* Copy original ucode data image from disk into backup cache. 5599 * This will be used to initialize the on-board processor's 5600 * data SRAM for a clean start when the runtime program first loads. */ 5601 memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr, 5602 il->ucode_data.len); 5603 5604 for (i = 0; i < MAX_HW_RESTARTS; i++) { 5605 5606 /* load bootstrap state machine, 5607 * load bootstrap program into processor's memory, 5608 * prepare to load the "initialize" uCode */ 5609 ret = il->ops->load_ucode(il); 5610 5611 if (ret) { 5612 IL_ERR("Unable to set up bootstrap uCode: %d\n", ret); 5613 continue; 5614 } 5615 5616 /* start card; "initialize" will load runtime ucode */ 5617 il4965_nic_start(il); 5618 5619 D_INFO(DRV_NAME " is coming up\n"); 5620 5621 return 0; 5622 } 5623 5624 set_bit(S_EXIT_PENDING, &il->status); 5625 __il4965_down(il); 5626 clear_bit(S_EXIT_PENDING, &il->status); 5627 5628 /* tried to restart and config the device for as long as our 5629 * patience could withstand */ 5630 IL_ERR("Unable to initialize device after %d attempts.\n", i); 5631 return -EIO; 5632 } 5633 5634 /***************************************************************************** 5635 * 5636 * Workqueue callbacks 5637 * 5638 *****************************************************************************/ 5639 5640 static void 5641 il4965_bg_init_alive_start(struct work_struct *data) 5642 { 5643 struct il_priv *il = 5644 container_of(data, struct il_priv, init_alive_start.work); 5645 5646 mutex_lock(&il->mutex); 5647 if (test_bit(S_EXIT_PENDING, &il->status)) 5648 goto out; 5649 5650 il->ops->init_alive_start(il); 5651 out: 5652 mutex_unlock(&il->mutex); 5653 } 5654 5655 static void 5656 il4965_bg_alive_start(struct work_struct *data) 5657 { 5658 struct il_priv *il = 5659 container_of(data, struct il_priv, alive_start.work); 5660 5661 mutex_lock(&il->mutex); 5662 if (test_bit(S_EXIT_PENDING, &il->status)) 5663 goto out; 5664 5665 il4965_alive_start(il); 5666 out: 5667 mutex_unlock(&il->mutex); 5668 } 5669 5670 static void 5671 il4965_bg_run_time_calib_work(struct work_struct *work) 5672 { 5673 struct il_priv *il = container_of(work, struct il_priv, 5674 run_time_calib_work); 5675 5676 mutex_lock(&il->mutex); 5677 5678 if (test_bit(S_EXIT_PENDING, &il->status) || 5679 test_bit(S_SCANNING, &il->status)) { 5680 mutex_unlock(&il->mutex); 5681 return; 5682 } 5683 5684 if (il->start_calib) { 5685 il4965_chain_noise_calibration(il, (void *)&il->_4965.stats); 5686 il4965_sensitivity_calibration(il, (void *)&il->_4965.stats); 5687 } 5688 5689 mutex_unlock(&il->mutex); 5690 } 5691 5692 static void 5693 il4965_bg_restart(struct work_struct *data) 5694 { 5695 struct il_priv *il = container_of(data, struct il_priv, restart); 5696 5697 if (test_bit(S_EXIT_PENDING, &il->status)) 5698 return; 5699 5700 if (test_and_clear_bit(S_FW_ERROR, &il->status)) { 5701 mutex_lock(&il->mutex); 5702 il->is_open = 0; 5703 5704 __il4965_down(il); 5705 5706 mutex_unlock(&il->mutex); 5707 il4965_cancel_deferred_work(il); 5708 ieee80211_restart_hw(il->hw); 5709 } else { 5710 il4965_down(il); 5711 5712 mutex_lock(&il->mutex); 5713 if (test_bit(S_EXIT_PENDING, &il->status)) { 5714 mutex_unlock(&il->mutex); 5715 return; 5716 } 5717 5718 __il4965_up(il); 5719 mutex_unlock(&il->mutex); 5720 } 5721 } 5722 5723 static void 5724 il4965_bg_rx_replenish(struct work_struct *data) 5725 { 5726 struct il_priv *il = container_of(data, struct il_priv, rx_replenish); 5727 5728 if (test_bit(S_EXIT_PENDING, &il->status)) 5729 return; 5730 5731 mutex_lock(&il->mutex); 5732 il4965_rx_replenish(il); 5733 mutex_unlock(&il->mutex); 5734 } 5735 5736 /***************************************************************************** 5737 * 5738 * mac80211 entry point functions 5739 * 5740 *****************************************************************************/ 5741 5742 #define UCODE_READY_TIMEOUT (4 * HZ) 5743 5744 /* 5745 * Not a mac80211 entry point function, but it fits in with all the 5746 * other mac80211 functions grouped here. 5747 */ 5748 static int 5749 il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length) 5750 { 5751 int ret; 5752 struct ieee80211_hw *hw = il->hw; 5753 5754 hw->rate_control_algorithm = "iwl-4965-rs"; 5755 5756 /* Tell mac80211 our characteristics */ 5757 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 5758 ieee80211_hw_set(hw, SUPPORTS_PS); 5759 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 5760 ieee80211_hw_set(hw, SPECTRUM_MGMT); 5761 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 5762 ieee80211_hw_set(hw, SIGNAL_DBM); 5763 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 5764 if (il->cfg->sku & IL_SKU_N) 5765 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 5766 NL80211_FEATURE_STATIC_SMPS; 5767 5768 hw->sta_data_size = sizeof(struct il_station_priv); 5769 hw->vif_data_size = sizeof(struct il_vif_priv); 5770 5771 hw->wiphy->interface_modes = 5772 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); 5773 5774 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 5775 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 5776 REGULATORY_DISABLE_BEACON_HINTS; 5777 5778 /* 5779 * For now, disable PS by default because it affects 5780 * RX performance significantly. 5781 */ 5782 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 5783 5784 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 5785 /* we create the 802.11 header and a zero-length SSID element */ 5786 hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2; 5787 5788 /* Default value; 4 EDCA QOS priorities */ 5789 hw->queues = 4; 5790 5791 hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL; 5792 5793 if (il->bands[NL80211_BAND_2GHZ].n_channels) 5794 il->hw->wiphy->bands[NL80211_BAND_2GHZ] = 5795 &il->bands[NL80211_BAND_2GHZ]; 5796 if (il->bands[NL80211_BAND_5GHZ].n_channels) 5797 il->hw->wiphy->bands[NL80211_BAND_5GHZ] = 5798 &il->bands[NL80211_BAND_5GHZ]; 5799 5800 il_leds_init(il); 5801 5802 ret = ieee80211_register_hw(il->hw); 5803 if (ret) { 5804 IL_ERR("Failed to register hw (error %d)\n", ret); 5805 return ret; 5806 } 5807 il->mac80211_registered = 1; 5808 5809 return 0; 5810 } 5811 5812 int 5813 il4965_mac_start(struct ieee80211_hw *hw) 5814 { 5815 struct il_priv *il = hw->priv; 5816 int ret; 5817 5818 D_MAC80211("enter\n"); 5819 5820 /* we should be verifying the device is ready to be opened */ 5821 mutex_lock(&il->mutex); 5822 ret = __il4965_up(il); 5823 mutex_unlock(&il->mutex); 5824 5825 if (ret) 5826 return ret; 5827 5828 if (il_is_rfkill(il)) 5829 goto out; 5830 5831 D_INFO("Start UP work done.\n"); 5832 5833 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from 5834 * mac80211 will not be run successfully. */ 5835 ret = wait_event_timeout(il->wait_command_queue, 5836 test_bit(S_READY, &il->status), 5837 UCODE_READY_TIMEOUT); 5838 if (!ret) { 5839 if (!test_bit(S_READY, &il->status)) { 5840 IL_ERR("START_ALIVE timeout after %dms.\n", 5841 jiffies_to_msecs(UCODE_READY_TIMEOUT)); 5842 return -ETIMEDOUT; 5843 } 5844 } 5845 5846 il4965_led_enable(il); 5847 5848 out: 5849 il->is_open = 1; 5850 D_MAC80211("leave\n"); 5851 return 0; 5852 } 5853 5854 void 5855 il4965_mac_stop(struct ieee80211_hw *hw) 5856 { 5857 struct il_priv *il = hw->priv; 5858 5859 D_MAC80211("enter\n"); 5860 5861 if (!il->is_open) 5862 return; 5863 5864 il->is_open = 0; 5865 5866 il4965_down(il); 5867 5868 flush_workqueue(il->workqueue); 5869 5870 /* User space software may expect getting rfkill changes 5871 * even if interface is down */ 5872 _il_wr(il, CSR_INT, 0xFFFFFFFF); 5873 il_enable_rfkill_int(il); 5874 5875 D_MAC80211("leave\n"); 5876 } 5877 5878 void 5879 il4965_mac_tx(struct ieee80211_hw *hw, 5880 struct ieee80211_tx_control *control, 5881 struct sk_buff *skb) 5882 { 5883 struct il_priv *il = hw->priv; 5884 5885 D_MACDUMP("enter\n"); 5886 5887 D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, 5888 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); 5889 5890 if (il4965_tx_skb(il, control->sta, skb)) 5891 dev_kfree_skb_any(skb); 5892 5893 D_MACDUMP("leave\n"); 5894 } 5895 5896 void 5897 il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 5898 struct ieee80211_key_conf *keyconf, 5899 struct ieee80211_sta *sta, u32 iv32, u16 * phase1key) 5900 { 5901 struct il_priv *il = hw->priv; 5902 5903 D_MAC80211("enter\n"); 5904 5905 il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key); 5906 5907 D_MAC80211("leave\n"); 5908 } 5909 5910 int 5911 il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 5912 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 5913 struct ieee80211_key_conf *key) 5914 { 5915 struct il_priv *il = hw->priv; 5916 int ret; 5917 u8 sta_id; 5918 bool is_default_wep_key = false; 5919 5920 D_MAC80211("enter\n"); 5921 5922 if (il->cfg->mod_params->sw_crypto) { 5923 D_MAC80211("leave - hwcrypto disabled\n"); 5924 return -EOPNOTSUPP; 5925 } 5926 5927 /* 5928 * To support IBSS RSN, don't program group keys in IBSS, the 5929 * hardware will then not attempt to decrypt the frames. 5930 */ 5931 if (vif->type == NL80211_IFTYPE_ADHOC && 5932 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 5933 D_MAC80211("leave - ad-hoc group key\n"); 5934 return -EOPNOTSUPP; 5935 } 5936 5937 sta_id = il_sta_id_or_broadcast(il, sta); 5938 if (sta_id == IL_INVALID_STATION) 5939 return -EINVAL; 5940 5941 mutex_lock(&il->mutex); 5942 il_scan_cancel_timeout(il, 100); 5943 5944 /* 5945 * If we are getting WEP group key and we didn't receive any key mapping 5946 * so far, we are in legacy wep mode (group key only), otherwise we are 5947 * in 1X mode. 5948 * In legacy wep mode, we use another host command to the uCode. 5949 */ 5950 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 5951 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 5952 if (cmd == SET_KEY) 5953 is_default_wep_key = !il->_4965.key_mapping_keys; 5954 else 5955 is_default_wep_key = 5956 (key->hw_key_idx == HW_KEY_DEFAULT); 5957 } 5958 5959 switch (cmd) { 5960 case SET_KEY: 5961 if (is_default_wep_key) 5962 ret = il4965_set_default_wep_key(il, key); 5963 else 5964 ret = il4965_set_dynamic_key(il, key, sta_id); 5965 5966 D_MAC80211("enable hwcrypto key\n"); 5967 break; 5968 case DISABLE_KEY: 5969 if (is_default_wep_key) 5970 ret = il4965_remove_default_wep_key(il, key); 5971 else 5972 ret = il4965_remove_dynamic_key(il, key, sta_id); 5973 5974 D_MAC80211("disable hwcrypto key\n"); 5975 break; 5976 default: 5977 ret = -EINVAL; 5978 } 5979 5980 mutex_unlock(&il->mutex); 5981 D_MAC80211("leave\n"); 5982 5983 return ret; 5984 } 5985 5986 int 5987 il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 5988 struct ieee80211_ampdu_params *params) 5989 { 5990 struct il_priv *il = hw->priv; 5991 int ret = -EINVAL; 5992 struct ieee80211_sta *sta = params->sta; 5993 enum ieee80211_ampdu_mlme_action action = params->action; 5994 u16 tid = params->tid; 5995 u16 *ssn = ¶ms->ssn; 5996 5997 D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid); 5998 5999 if (!(il->cfg->sku & IL_SKU_N)) 6000 return -EACCES; 6001 6002 mutex_lock(&il->mutex); 6003 6004 switch (action) { 6005 case IEEE80211_AMPDU_RX_START: 6006 D_HT("start Rx\n"); 6007 ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn); 6008 break; 6009 case IEEE80211_AMPDU_RX_STOP: 6010 D_HT("stop Rx\n"); 6011 ret = il4965_sta_rx_agg_stop(il, sta, tid); 6012 if (test_bit(S_EXIT_PENDING, &il->status)) 6013 ret = 0; 6014 break; 6015 case IEEE80211_AMPDU_TX_START: 6016 D_HT("start Tx\n"); 6017 ret = il4965_tx_agg_start(il, vif, sta, tid, ssn); 6018 break; 6019 case IEEE80211_AMPDU_TX_STOP_CONT: 6020 case IEEE80211_AMPDU_TX_STOP_FLUSH: 6021 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 6022 D_HT("stop Tx\n"); 6023 ret = il4965_tx_agg_stop(il, vif, sta, tid); 6024 if (test_bit(S_EXIT_PENDING, &il->status)) 6025 ret = 0; 6026 break; 6027 case IEEE80211_AMPDU_TX_OPERATIONAL: 6028 ret = 0; 6029 break; 6030 } 6031 mutex_unlock(&il->mutex); 6032 6033 return ret; 6034 } 6035 6036 int 6037 il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 6038 struct ieee80211_sta *sta) 6039 { 6040 struct il_priv *il = hw->priv; 6041 struct il_station_priv *sta_priv = (void *)sta->drv_priv; 6042 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 6043 int ret; 6044 u8 sta_id; 6045 6046 D_INFO("received request to add station %pM\n", sta->addr); 6047 mutex_lock(&il->mutex); 6048 D_INFO("proceeding to add station %pM\n", sta->addr); 6049 sta_priv->common.sta_id = IL_INVALID_STATION; 6050 6051 atomic_set(&sta_priv->pending_frames, 0); 6052 6053 ret = 6054 il_add_station_common(il, sta->addr, is_ap, sta, &sta_id); 6055 if (ret) { 6056 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret); 6057 /* Should we return success if return code is EEXIST ? */ 6058 mutex_unlock(&il->mutex); 6059 return ret; 6060 } 6061 6062 sta_priv->common.sta_id = sta_id; 6063 6064 /* Initialize rate scaling */ 6065 D_INFO("Initializing rate scaling for station %pM\n", sta->addr); 6066 il4965_rs_rate_init(il, sta, sta_id); 6067 mutex_unlock(&il->mutex); 6068 6069 return 0; 6070 } 6071 6072 void 6073 il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 6074 struct ieee80211_channel_switch *ch_switch) 6075 { 6076 struct il_priv *il = hw->priv; 6077 const struct il_channel_info *ch_info; 6078 struct ieee80211_conf *conf = &hw->conf; 6079 struct ieee80211_channel *channel = ch_switch->chandef.chan; 6080 struct il_ht_config *ht_conf = &il->current_ht_config; 6081 u16 ch; 6082 6083 D_MAC80211("enter\n"); 6084 6085 mutex_lock(&il->mutex); 6086 6087 if (il_is_rfkill(il)) 6088 goto out; 6089 6090 if (test_bit(S_EXIT_PENDING, &il->status) || 6091 test_bit(S_SCANNING, &il->status) || 6092 test_bit(S_CHANNEL_SWITCH_PENDING, &il->status)) 6093 goto out; 6094 6095 if (!il_is_associated(il)) 6096 goto out; 6097 6098 if (!il->ops->set_channel_switch) 6099 goto out; 6100 6101 ch = channel->hw_value; 6102 if (le16_to_cpu(il->active.channel) == ch) 6103 goto out; 6104 6105 ch_info = il_get_channel_info(il, channel->band, ch); 6106 if (!il_is_channel_valid(ch_info)) { 6107 D_MAC80211("invalid channel\n"); 6108 goto out; 6109 } 6110 6111 spin_lock_irq(&il->lock); 6112 6113 il->current_ht_config.smps = conf->smps_mode; 6114 6115 /* Configure HT40 channels */ 6116 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 6117 case NL80211_CHAN_NO_HT: 6118 case NL80211_CHAN_HT20: 6119 il->ht.is_40mhz = false; 6120 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 6121 break; 6122 case NL80211_CHAN_HT40MINUS: 6123 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 6124 il->ht.is_40mhz = true; 6125 break; 6126 case NL80211_CHAN_HT40PLUS: 6127 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 6128 il->ht.is_40mhz = true; 6129 break; 6130 } 6131 6132 if ((le16_to_cpu(il->staging.channel) != ch)) 6133 il->staging.flags = 0; 6134 6135 il_set_rxon_channel(il, channel); 6136 il_set_rxon_ht(il, ht_conf); 6137 il_set_flags_for_band(il, channel->band, il->vif); 6138 6139 spin_unlock_irq(&il->lock); 6140 6141 il_set_rate(il); 6142 /* 6143 * at this point, staging_rxon has the 6144 * configuration for channel switch 6145 */ 6146 set_bit(S_CHANNEL_SWITCH_PENDING, &il->status); 6147 il->switch_channel = cpu_to_le16(ch); 6148 if (il->ops->set_channel_switch(il, ch_switch)) { 6149 clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status); 6150 il->switch_channel = 0; 6151 ieee80211_chswitch_done(il->vif, false); 6152 } 6153 6154 out: 6155 mutex_unlock(&il->mutex); 6156 D_MAC80211("leave\n"); 6157 } 6158 6159 void 6160 il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, 6161 unsigned int *total_flags, u64 multicast) 6162 { 6163 struct il_priv *il = hw->priv; 6164 __le32 filter_or = 0, filter_nand = 0; 6165 6166 #define CHK(test, flag) do { \ 6167 if (*total_flags & (test)) \ 6168 filter_or |= (flag); \ 6169 else \ 6170 filter_nand |= (flag); \ 6171 } while (0) 6172 6173 D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags, 6174 *total_flags); 6175 6176 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 6177 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 6178 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 6179 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 6180 6181 #undef CHK 6182 6183 mutex_lock(&il->mutex); 6184 6185 il->staging.filter_flags &= ~filter_nand; 6186 il->staging.filter_flags |= filter_or; 6187 6188 /* 6189 * Not committing directly because hardware can perform a scan, 6190 * but we'll eventually commit the filter flags change anyway. 6191 */ 6192 6193 mutex_unlock(&il->mutex); 6194 6195 /* 6196 * Receiving all multicast frames is always enabled by the 6197 * default flags setup in il_connection_init_rx_config() 6198 * since we currently do not support programming multicast 6199 * filters into the device. 6200 */ 6201 *total_flags &= 6202 FIF_OTHER_BSS | FIF_ALLMULTI | 6203 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 6204 } 6205 6206 /***************************************************************************** 6207 * 6208 * driver setup and teardown 6209 * 6210 *****************************************************************************/ 6211 6212 static void 6213 il4965_bg_txpower_work(struct work_struct *work) 6214 { 6215 struct il_priv *il = container_of(work, struct il_priv, 6216 txpower_work); 6217 6218 mutex_lock(&il->mutex); 6219 6220 /* If a scan happened to start before we got here 6221 * then just return; the stats notification will 6222 * kick off another scheduled work to compensate for 6223 * any temperature delta we missed here. */ 6224 if (test_bit(S_EXIT_PENDING, &il->status) || 6225 test_bit(S_SCANNING, &il->status)) 6226 goto out; 6227 6228 /* Regardless of if we are associated, we must reconfigure the 6229 * TX power since frames can be sent on non-radar channels while 6230 * not associated */ 6231 il->ops->send_tx_power(il); 6232 6233 /* Update last_temperature to keep is_calib_needed from running 6234 * when it isn't needed... */ 6235 il->last_temperature = il->temperature; 6236 out: 6237 mutex_unlock(&il->mutex); 6238 } 6239 6240 static void 6241 il4965_setup_deferred_work(struct il_priv *il) 6242 { 6243 il->workqueue = create_singlethread_workqueue(DRV_NAME); 6244 6245 init_waitqueue_head(&il->wait_command_queue); 6246 6247 INIT_WORK(&il->restart, il4965_bg_restart); 6248 INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish); 6249 INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work); 6250 INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start); 6251 INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start); 6252 6253 il_setup_scan_deferred_work(il); 6254 6255 INIT_WORK(&il->txpower_work, il4965_bg_txpower_work); 6256 6257 setup_timer(&il->stats_periodic, il4965_bg_stats_periodic, 6258 (unsigned long)il); 6259 6260 setup_timer(&il->watchdog, il_bg_watchdog, (unsigned long)il); 6261 6262 tasklet_init(&il->irq_tasklet, 6263 (void (*)(unsigned long))il4965_irq_tasklet, 6264 (unsigned long)il); 6265 } 6266 6267 static void 6268 il4965_cancel_deferred_work(struct il_priv *il) 6269 { 6270 cancel_work_sync(&il->txpower_work); 6271 cancel_delayed_work_sync(&il->init_alive_start); 6272 cancel_delayed_work(&il->alive_start); 6273 cancel_work_sync(&il->run_time_calib_work); 6274 6275 il_cancel_scan_deferred_work(il); 6276 6277 del_timer_sync(&il->stats_periodic); 6278 } 6279 6280 static void 6281 il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates) 6282 { 6283 int i; 6284 6285 for (i = 0; i < RATE_COUNT_LEGACY; i++) { 6286 rates[i].bitrate = il_rates[i].ieee * 5; 6287 rates[i].hw_value = i; /* Rate scaling will work on idxes */ 6288 rates[i].hw_value_short = i; 6289 rates[i].flags = 0; 6290 if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) { 6291 /* 6292 * If CCK != 1M then set short preamble rate flag. 6293 */ 6294 rates[i].flags |= 6295 (il_rates[i].plcp == 6296 RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; 6297 } 6298 } 6299 } 6300 6301 /* 6302 * Acquire il->lock before calling this function ! 6303 */ 6304 void 6305 il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx) 6306 { 6307 il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8)); 6308 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx); 6309 } 6310 6311 void 6312 il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq, 6313 int tx_fifo_id, int scd_retry) 6314 { 6315 int txq_id = txq->q.id; 6316 6317 /* Find out whether to activate Tx queue */ 6318 int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0; 6319 6320 /* Set up and activate */ 6321 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id), 6322 (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | 6323 (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) | 6324 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) | 6325 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) | 6326 IL49_SCD_QUEUE_STTS_REG_MSK); 6327 6328 txq->sched_retry = scd_retry; 6329 6330 D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate", 6331 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id); 6332 } 6333 6334 static const struct ieee80211_ops il4965_mac_ops = { 6335 .tx = il4965_mac_tx, 6336 .start = il4965_mac_start, 6337 .stop = il4965_mac_stop, 6338 .add_interface = il_mac_add_interface, 6339 .remove_interface = il_mac_remove_interface, 6340 .change_interface = il_mac_change_interface, 6341 .config = il_mac_config, 6342 .configure_filter = il4965_configure_filter, 6343 .set_key = il4965_mac_set_key, 6344 .update_tkip_key = il4965_mac_update_tkip_key, 6345 .conf_tx = il_mac_conf_tx, 6346 .reset_tsf = il_mac_reset_tsf, 6347 .bss_info_changed = il_mac_bss_info_changed, 6348 .ampdu_action = il4965_mac_ampdu_action, 6349 .hw_scan = il_mac_hw_scan, 6350 .sta_add = il4965_mac_sta_add, 6351 .sta_remove = il_mac_sta_remove, 6352 .channel_switch = il4965_mac_channel_switch, 6353 .tx_last_beacon = il_mac_tx_last_beacon, 6354 .flush = il_mac_flush, 6355 }; 6356 6357 static int 6358 il4965_init_drv(struct il_priv *il) 6359 { 6360 int ret; 6361 6362 spin_lock_init(&il->sta_lock); 6363 spin_lock_init(&il->hcmd_lock); 6364 6365 INIT_LIST_HEAD(&il->free_frames); 6366 6367 mutex_init(&il->mutex); 6368 6369 il->ieee_channels = NULL; 6370 il->ieee_rates = NULL; 6371 il->band = NL80211_BAND_2GHZ; 6372 6373 il->iw_mode = NL80211_IFTYPE_STATION; 6374 il->current_ht_config.smps = IEEE80211_SMPS_STATIC; 6375 il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF; 6376 6377 /* initialize force reset */ 6378 il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD; 6379 6380 /* Choose which receivers/antennas to use */ 6381 if (il->ops->set_rxon_chain) 6382 il->ops->set_rxon_chain(il); 6383 6384 il_init_scan_params(il); 6385 6386 ret = il_init_channel_map(il); 6387 if (ret) { 6388 IL_ERR("initializing regulatory failed: %d\n", ret); 6389 goto err; 6390 } 6391 6392 ret = il_init_geos(il); 6393 if (ret) { 6394 IL_ERR("initializing geos failed: %d\n", ret); 6395 goto err_free_channel_map; 6396 } 6397 il4965_init_hw_rates(il, il->ieee_rates); 6398 6399 return 0; 6400 6401 err_free_channel_map: 6402 il_free_channel_map(il); 6403 err: 6404 return ret; 6405 } 6406 6407 static void 6408 il4965_uninit_drv(struct il_priv *il) 6409 { 6410 il_free_geos(il); 6411 il_free_channel_map(il); 6412 kfree(il->scan_cmd); 6413 } 6414 6415 static void 6416 il4965_hw_detect(struct il_priv *il) 6417 { 6418 il->hw_rev = _il_rd(il, CSR_HW_REV); 6419 il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG); 6420 il->rev_id = il->pci_dev->revision; 6421 D_INFO("HW Revision ID = 0x%X\n", il->rev_id); 6422 } 6423 6424 static const struct il_sensitivity_ranges il4965_sensitivity = { 6425 .min_nrg_cck = 97, 6426 .max_nrg_cck = 0, /* not used, set to 0 */ 6427 6428 .auto_corr_min_ofdm = 85, 6429 .auto_corr_min_ofdm_mrc = 170, 6430 .auto_corr_min_ofdm_x1 = 105, 6431 .auto_corr_min_ofdm_mrc_x1 = 220, 6432 6433 .auto_corr_max_ofdm = 120, 6434 .auto_corr_max_ofdm_mrc = 210, 6435 .auto_corr_max_ofdm_x1 = 140, 6436 .auto_corr_max_ofdm_mrc_x1 = 270, 6437 6438 .auto_corr_min_cck = 125, 6439 .auto_corr_max_cck = 200, 6440 .auto_corr_min_cck_mrc = 200, 6441 .auto_corr_max_cck_mrc = 400, 6442 6443 .nrg_th_cck = 100, 6444 .nrg_th_ofdm = 100, 6445 6446 .barker_corr_th_min = 190, 6447 .barker_corr_th_min_mrc = 390, 6448 .nrg_th_cca = 62, 6449 }; 6450 6451 static void 6452 il4965_set_hw_params(struct il_priv *il) 6453 { 6454 il->hw_params.bcast_id = IL4965_BROADCAST_ID; 6455 il->hw_params.max_rxq_size = RX_QUEUE_SIZE; 6456 il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG; 6457 if (il->cfg->mod_params->amsdu_size_8K) 6458 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K); 6459 else 6460 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K); 6461 6462 il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL; 6463 6464 if (il->cfg->mod_params->disable_11n) 6465 il->cfg->sku &= ~IL_SKU_N; 6466 6467 if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES && 6468 il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES) 6469 il->cfg->num_of_queues = 6470 il->cfg->mod_params->num_of_queues; 6471 6472 il->hw_params.max_txq_num = il->cfg->num_of_queues; 6473 il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM; 6474 il->hw_params.scd_bc_tbls_size = 6475 il->cfg->num_of_queues * 6476 sizeof(struct il4965_scd_bc_tbl); 6477 6478 il->hw_params.tfd_size = sizeof(struct il_tfd); 6479 il->hw_params.max_stations = IL4965_STATION_COUNT; 6480 il->hw_params.max_data_size = IL49_RTC_DATA_SIZE; 6481 il->hw_params.max_inst_size = IL49_RTC_INST_SIZE; 6482 il->hw_params.max_bsm_size = BSM_SRAM_SIZE; 6483 il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ); 6484 6485 il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR; 6486 6487 il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant); 6488 il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant); 6489 il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant; 6490 il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant; 6491 6492 il->hw_params.ct_kill_threshold = 6493 CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY); 6494 6495 il->hw_params.sens = &il4965_sensitivity; 6496 il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS; 6497 } 6498 6499 static int 6500 il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 6501 { 6502 int err = 0; 6503 struct il_priv *il; 6504 struct ieee80211_hw *hw; 6505 struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data); 6506 unsigned long flags; 6507 u16 pci_cmd; 6508 6509 /************************ 6510 * 1. Allocating HW data 6511 ************************/ 6512 6513 hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops); 6514 if (!hw) { 6515 err = -ENOMEM; 6516 goto out; 6517 } 6518 il = hw->priv; 6519 il->hw = hw; 6520 SET_IEEE80211_DEV(hw, &pdev->dev); 6521 6522 D_INFO("*** LOAD DRIVER ***\n"); 6523 il->cfg = cfg; 6524 il->ops = &il4965_ops; 6525 #ifdef CONFIG_IWLEGACY_DEBUGFS 6526 il->debugfs_ops = &il4965_debugfs_ops; 6527 #endif 6528 il->pci_dev = pdev; 6529 il->inta_mask = CSR_INI_SET_MASK; 6530 6531 /************************** 6532 * 2. Initializing PCI bus 6533 **************************/ 6534 pci_disable_link_state(pdev, 6535 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | 6536 PCIE_LINK_STATE_CLKPM); 6537 6538 if (pci_enable_device(pdev)) { 6539 err = -ENODEV; 6540 goto out_ieee80211_free_hw; 6541 } 6542 6543 pci_set_master(pdev); 6544 6545 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); 6546 if (!err) 6547 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36)); 6548 if (err) { 6549 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 6550 if (!err) 6551 err = 6552 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 6553 /* both attempts failed: */ 6554 if (err) { 6555 IL_WARN("No suitable DMA available.\n"); 6556 goto out_pci_disable_device; 6557 } 6558 } 6559 6560 err = pci_request_regions(pdev, DRV_NAME); 6561 if (err) 6562 goto out_pci_disable_device; 6563 6564 pci_set_drvdata(pdev, il); 6565 6566 /*********************** 6567 * 3. Read REV register 6568 ***********************/ 6569 il->hw_base = pci_ioremap_bar(pdev, 0); 6570 if (!il->hw_base) { 6571 err = -ENODEV; 6572 goto out_pci_release_regions; 6573 } 6574 6575 D_INFO("pci_resource_len = 0x%08llx\n", 6576 (unsigned long long)pci_resource_len(pdev, 0)); 6577 D_INFO("pci_resource_base = %p\n", il->hw_base); 6578 6579 /* these spin locks will be used in apm_ops.init and EEPROM access 6580 * we should init now 6581 */ 6582 spin_lock_init(&il->reg_lock); 6583 spin_lock_init(&il->lock); 6584 6585 /* 6586 * stop and reset the on-board processor just in case it is in a 6587 * strange state ... like being left stranded by a primary kernel 6588 * and this is now the kdump kernel trying to start up 6589 */ 6590 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); 6591 6592 il4965_hw_detect(il); 6593 IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev); 6594 6595 /* We disable the RETRY_TIMEOUT register (0x41) to keep 6596 * PCI Tx retries from interfering with C3 CPU state */ 6597 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); 6598 6599 il4965_prepare_card_hw(il); 6600 if (!il->hw_ready) { 6601 IL_WARN("Failed, HW not ready\n"); 6602 err = -EIO; 6603 goto out_iounmap; 6604 } 6605 6606 /***************** 6607 * 4. Read EEPROM 6608 *****************/ 6609 /* Read the EEPROM */ 6610 err = il_eeprom_init(il); 6611 if (err) { 6612 IL_ERR("Unable to init EEPROM\n"); 6613 goto out_iounmap; 6614 } 6615 err = il4965_eeprom_check_version(il); 6616 if (err) 6617 goto out_free_eeprom; 6618 6619 /* extract MAC Address */ 6620 il4965_eeprom_get_mac(il, il->addresses[0].addr); 6621 D_INFO("MAC address: %pM\n", il->addresses[0].addr); 6622 il->hw->wiphy->addresses = il->addresses; 6623 il->hw->wiphy->n_addresses = 1; 6624 6625 /************************ 6626 * 5. Setup HW constants 6627 ************************/ 6628 il4965_set_hw_params(il); 6629 6630 /******************* 6631 * 6. Setup il 6632 *******************/ 6633 6634 err = il4965_init_drv(il); 6635 if (err) 6636 goto out_free_eeprom; 6637 /* At this point both hw and il are initialized. */ 6638 6639 /******************** 6640 * 7. Setup services 6641 ********************/ 6642 spin_lock_irqsave(&il->lock, flags); 6643 il_disable_interrupts(il); 6644 spin_unlock_irqrestore(&il->lock, flags); 6645 6646 pci_enable_msi(il->pci_dev); 6647 6648 err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il); 6649 if (err) { 6650 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq); 6651 goto out_disable_msi; 6652 } 6653 6654 il4965_setup_deferred_work(il); 6655 il4965_setup_handlers(il); 6656 6657 /********************************************* 6658 * 8. Enable interrupts and read RFKILL state 6659 *********************************************/ 6660 6661 /* enable rfkill interrupt: hw bug w/a */ 6662 pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd); 6663 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { 6664 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 6665 pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd); 6666 } 6667 6668 il_enable_rfkill_int(il); 6669 6670 /* If platform's RF_KILL switch is NOT set to KILL */ 6671 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) 6672 clear_bit(S_RFKILL, &il->status); 6673 else 6674 set_bit(S_RFKILL, &il->status); 6675 6676 wiphy_rfkill_set_hw_state(il->hw->wiphy, 6677 test_bit(S_RFKILL, &il->status)); 6678 6679 il_power_initialize(il); 6680 6681 init_completion(&il->_4965.firmware_loading_complete); 6682 6683 err = il4965_request_firmware(il, true); 6684 if (err) 6685 goto out_destroy_workqueue; 6686 6687 return 0; 6688 6689 out_destroy_workqueue: 6690 destroy_workqueue(il->workqueue); 6691 il->workqueue = NULL; 6692 free_irq(il->pci_dev->irq, il); 6693 out_disable_msi: 6694 pci_disable_msi(il->pci_dev); 6695 il4965_uninit_drv(il); 6696 out_free_eeprom: 6697 il_eeprom_free(il); 6698 out_iounmap: 6699 iounmap(il->hw_base); 6700 out_pci_release_regions: 6701 pci_release_regions(pdev); 6702 out_pci_disable_device: 6703 pci_disable_device(pdev); 6704 out_ieee80211_free_hw: 6705 ieee80211_free_hw(il->hw); 6706 out: 6707 return err; 6708 } 6709 6710 static void 6711 il4965_pci_remove(struct pci_dev *pdev) 6712 { 6713 struct il_priv *il = pci_get_drvdata(pdev); 6714 unsigned long flags; 6715 6716 if (!il) 6717 return; 6718 6719 wait_for_completion(&il->_4965.firmware_loading_complete); 6720 6721 D_INFO("*** UNLOAD DRIVER ***\n"); 6722 6723 il_dbgfs_unregister(il); 6724 sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group); 6725 6726 /* ieee80211_unregister_hw call wil cause il_mac_stop to 6727 * to be called and il4965_down since we are removing the device 6728 * we need to set S_EXIT_PENDING bit. 6729 */ 6730 set_bit(S_EXIT_PENDING, &il->status); 6731 6732 il_leds_exit(il); 6733 6734 if (il->mac80211_registered) { 6735 ieee80211_unregister_hw(il->hw); 6736 il->mac80211_registered = 0; 6737 } else { 6738 il4965_down(il); 6739 } 6740 6741 /* 6742 * Make sure device is reset to low power before unloading driver. 6743 * This may be redundant with il4965_down(), but there are paths to 6744 * run il4965_down() without calling apm_ops.stop(), and there are 6745 * paths to avoid running il4965_down() at all before leaving driver. 6746 * This (inexpensive) call *makes sure* device is reset. 6747 */ 6748 il_apm_stop(il); 6749 6750 /* make sure we flush any pending irq or 6751 * tasklet for the driver 6752 */ 6753 spin_lock_irqsave(&il->lock, flags); 6754 il_disable_interrupts(il); 6755 spin_unlock_irqrestore(&il->lock, flags); 6756 6757 il4965_synchronize_irq(il); 6758 6759 il4965_dealloc_ucode_pci(il); 6760 6761 if (il->rxq.bd) 6762 il4965_rx_queue_free(il, &il->rxq); 6763 il4965_hw_txq_ctx_free(il); 6764 6765 il_eeprom_free(il); 6766 6767 /*netif_stop_queue(dev); */ 6768 flush_workqueue(il->workqueue); 6769 6770 /* ieee80211_unregister_hw calls il_mac_stop, which flushes 6771 * il->workqueue... so we can't take down the workqueue 6772 * until now... */ 6773 destroy_workqueue(il->workqueue); 6774 il->workqueue = NULL; 6775 6776 free_irq(il->pci_dev->irq, il); 6777 pci_disable_msi(il->pci_dev); 6778 iounmap(il->hw_base); 6779 pci_release_regions(pdev); 6780 pci_disable_device(pdev); 6781 6782 il4965_uninit_drv(il); 6783 6784 dev_kfree_skb(il->beacon_skb); 6785 6786 ieee80211_free_hw(il->hw); 6787 } 6788 6789 /* 6790 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask 6791 * must be called under il->lock and mac access 6792 */ 6793 void 6794 il4965_txq_set_sched(struct il_priv *il, u32 mask) 6795 { 6796 il_wr_prph(il, IL49_SCD_TXFACT, mask); 6797 } 6798 6799 /***************************************************************************** 6800 * 6801 * driver and module entry point 6802 * 6803 *****************************************************************************/ 6804 6805 /* Hardware specific file defines the PCI IDs table for that hardware module */ 6806 static const struct pci_device_id il4965_hw_card_ids[] = { 6807 {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)}, 6808 {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)}, 6809 {0} 6810 }; 6811 MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids); 6812 6813 static struct pci_driver il4965_driver = { 6814 .name = DRV_NAME, 6815 .id_table = il4965_hw_card_ids, 6816 .probe = il4965_pci_probe, 6817 .remove = il4965_pci_remove, 6818 .driver.pm = IL_LEGACY_PM_OPS, 6819 }; 6820 6821 static int __init 6822 il4965_init(void) 6823 { 6824 6825 int ret; 6826 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n"); 6827 pr_info(DRV_COPYRIGHT "\n"); 6828 6829 ret = il4965_rate_control_register(); 6830 if (ret) { 6831 pr_err("Unable to register rate control algorithm: %d\n", ret); 6832 return ret; 6833 } 6834 6835 ret = pci_register_driver(&il4965_driver); 6836 if (ret) { 6837 pr_err("Unable to initialize PCI module\n"); 6838 goto error_register; 6839 } 6840 6841 return ret; 6842 6843 error_register: 6844 il4965_rate_control_unregister(); 6845 return ret; 6846 } 6847 6848 static void __exit 6849 il4965_exit(void) 6850 { 6851 pci_unregister_driver(&il4965_driver); 6852 il4965_rate_control_unregister(); 6853 } 6854 6855 module_exit(il4965_exit); 6856 module_init(il4965_init); 6857 6858 #ifdef CONFIG_IWLEGACY_DEBUG 6859 module_param_named(debug, il_debug_level, uint, S_IRUGO | S_IWUSR); 6860 MODULE_PARM_DESC(debug, "debug output mask"); 6861 #endif 6862 6863 module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, S_IRUGO); 6864 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])"); 6865 module_param_named(queues_num, il4965_mod_params.num_of_queues, int, S_IRUGO); 6866 MODULE_PARM_DESC(queues_num, "number of hw queues."); 6867 module_param_named(11n_disable, il4965_mod_params.disable_11n, int, S_IRUGO); 6868 MODULE_PARM_DESC(11n_disable, "disable 11n functionality"); 6869 module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 6870 S_IRUGO); 6871 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])"); 6872 module_param_named(fw_restart, il4965_mod_params.restart_fw, int, S_IRUGO); 6873 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error"); 6874