Tomas Winkler | a55360e | 2008-05-05 10:22:28 +0800 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright(c) 2003 - 2008 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 | * James P. Ketrenos <ipw2100-admin@linux.intel.com> |
| 26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 27 | * |
| 28 | *****************************************************************************/ |
| 29 | |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 30 | #include <linux/etherdevice.h> |
Tomas Winkler | a55360e | 2008-05-05 10:22:28 +0800 | [diff] [blame] | 31 | #include <net/mac80211.h> |
| 32 | #include "iwl-eeprom.h" |
| 33 | #include "iwl-dev.h" |
| 34 | #include "iwl-core.h" |
| 35 | #include "iwl-sta.h" |
| 36 | #include "iwl-io.h" |
Tomas Winkler | c135475 | 2008-05-29 16:35:04 +0800 | [diff] [blame] | 37 | #include "iwl-calib.h" |
Tomas Winkler | a55360e | 2008-05-05 10:22:28 +0800 | [diff] [blame] | 38 | #include "iwl-helpers.h" |
| 39 | /************************** RX-FUNCTIONS ****************************/ |
| 40 | /* |
| 41 | * Rx theory of operation |
| 42 | * |
| 43 | * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs), |
| 44 | * each of which point to Receive Buffers to be filled by the NIC. These get |
| 45 | * used not only for Rx frames, but for any command response or notification |
| 46 | * from the NIC. The driver and NIC manage the Rx buffers by means |
| 47 | * of indexes into the circular buffer. |
| 48 | * |
| 49 | * Rx Queue Indexes |
| 50 | * The host/firmware share two index registers for managing the Rx buffers. |
| 51 | * |
| 52 | * The READ index maps to the first position that the firmware may be writing |
| 53 | * to -- the driver can read up to (but not including) this position and get |
| 54 | * good data. |
| 55 | * The READ index is managed by the firmware once the card is enabled. |
| 56 | * |
| 57 | * The WRITE index maps to the last position the driver has read from -- the |
| 58 | * position preceding WRITE is the last slot the firmware can place a packet. |
| 59 | * |
| 60 | * The queue is empty (no good data) if WRITE = READ - 1, and is full if |
| 61 | * WRITE = READ. |
| 62 | * |
| 63 | * During initialization, the host sets up the READ queue position to the first |
| 64 | * INDEX position, and WRITE to the last (READ - 1 wrapped) |
| 65 | * |
| 66 | * When the firmware places a packet in a buffer, it will advance the READ index |
| 67 | * and fire the RX interrupt. The driver can then query the READ index and |
| 68 | * process as many packets as possible, moving the WRITE index forward as it |
| 69 | * resets the Rx queue buffers with new memory. |
| 70 | * |
| 71 | * The management in the driver is as follows: |
| 72 | * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When |
| 73 | * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled |
| 74 | * to replenish the iwl->rxq->rx_free. |
| 75 | * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the |
| 76 | * iwl->rxq is replenished and the READ INDEX is updated (updating the |
| 77 | * 'processed' and 'read' driver indexes as well) |
| 78 | * + A received packet is processed and handed to the kernel network stack, |
| 79 | * detached from the iwl->rxq. The driver 'processed' index is updated. |
| 80 | * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free |
| 81 | * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ |
| 82 | * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there |
| 83 | * were enough free buffers and RX_STALLED is set it is cleared. |
| 84 | * |
| 85 | * |
| 86 | * Driver sequence: |
| 87 | * |
| 88 | * iwl_rx_queue_alloc() Allocates rx_free |
| 89 | * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls |
| 90 | * iwl_rx_queue_restock |
| 91 | * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx |
| 92 | * queue, updates firmware pointers, and updates |
| 93 | * the WRITE index. If insufficient rx_free buffers |
| 94 | * are available, schedules iwl_rx_replenish |
| 95 | * |
| 96 | * -- enable interrupts -- |
| 97 | * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the |
| 98 | * READ INDEX, detaching the SKB from the pool. |
| 99 | * Moves the packet buffer from queue to rx_used. |
| 100 | * Calls iwl_rx_queue_restock to refill any empty |
| 101 | * slots. |
| 102 | * ... |
| 103 | * |
| 104 | */ |
| 105 | |
| 106 | /** |
| 107 | * iwl_rx_queue_space - Return number of free slots available in queue. |
| 108 | */ |
| 109 | int iwl_rx_queue_space(const struct iwl_rx_queue *q) |
| 110 | { |
| 111 | int s = q->read - q->write; |
| 112 | if (s <= 0) |
| 113 | s += RX_QUEUE_SIZE; |
| 114 | /* keep some buffer to not confuse full and empty queue */ |
| 115 | s -= 2; |
| 116 | if (s < 0) |
| 117 | s = 0; |
| 118 | return s; |
| 119 | } |
| 120 | EXPORT_SYMBOL(iwl_rx_queue_space); |
| 121 | |
| 122 | /** |
| 123 | * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue |
| 124 | */ |
| 125 | int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q) |
| 126 | { |
| 127 | u32 reg = 0; |
| 128 | int ret = 0; |
| 129 | unsigned long flags; |
| 130 | |
| 131 | spin_lock_irqsave(&q->lock, flags); |
| 132 | |
| 133 | if (q->need_update == 0) |
| 134 | goto exit_unlock; |
| 135 | |
| 136 | /* If power-saving is in use, make sure device is awake */ |
| 137 | if (test_bit(STATUS_POWER_PMI, &priv->status)) { |
| 138 | reg = iwl_read32(priv, CSR_UCODE_DRV_GP1); |
| 139 | |
| 140 | if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { |
| 141 | iwl_set_bit(priv, CSR_GP_CNTRL, |
| 142 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
| 143 | goto exit_unlock; |
| 144 | } |
| 145 | |
| 146 | ret = iwl_grab_nic_access(priv); |
| 147 | if (ret) |
| 148 | goto exit_unlock; |
| 149 | |
| 150 | /* Device expects a multiple of 8 */ |
| 151 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR, |
| 152 | q->write & ~0x7); |
| 153 | iwl_release_nic_access(priv); |
| 154 | |
| 155 | /* Else device is assumed to be awake */ |
| 156 | } else |
| 157 | /* Device expects a multiple of 8 */ |
| 158 | iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7); |
| 159 | |
| 160 | |
| 161 | q->need_update = 0; |
| 162 | |
| 163 | exit_unlock: |
| 164 | spin_unlock_irqrestore(&q->lock, flags); |
| 165 | return ret; |
| 166 | } |
| 167 | EXPORT_SYMBOL(iwl_rx_queue_update_write_ptr); |
| 168 | /** |
| 169 | * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr |
| 170 | */ |
| 171 | static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv, |
| 172 | dma_addr_t dma_addr) |
| 173 | { |
| 174 | return cpu_to_le32((u32)(dma_addr >> 8)); |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * iwl_rx_queue_restock - refill RX queue from pre-allocated pool |
| 179 | * |
| 180 | * If there are slots in the RX queue that need to be restocked, |
| 181 | * and we have free pre-allocated buffers, fill the ranks as much |
| 182 | * as we can, pulling from rx_free. |
| 183 | * |
| 184 | * This moves the 'write' index forward to catch up with 'processed', and |
| 185 | * also updates the memory address in the firmware to reference the new |
| 186 | * target buffer. |
| 187 | */ |
| 188 | int iwl_rx_queue_restock(struct iwl_priv *priv) |
| 189 | { |
| 190 | struct iwl_rx_queue *rxq = &priv->rxq; |
| 191 | struct list_head *element; |
| 192 | struct iwl_rx_mem_buffer *rxb; |
| 193 | unsigned long flags; |
| 194 | int write; |
| 195 | int ret = 0; |
| 196 | |
| 197 | spin_lock_irqsave(&rxq->lock, flags); |
| 198 | write = rxq->write & ~0x7; |
| 199 | while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) { |
| 200 | /* Get next free Rx buffer, remove from free list */ |
| 201 | element = rxq->rx_free.next; |
| 202 | rxb = list_entry(element, struct iwl_rx_mem_buffer, list); |
| 203 | list_del(element); |
| 204 | |
| 205 | /* Point to Rx buffer via next RBD in circular buffer */ |
| 206 | rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr); |
| 207 | rxq->queue[rxq->write] = rxb; |
| 208 | rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; |
| 209 | rxq->free_count--; |
| 210 | } |
| 211 | spin_unlock_irqrestore(&rxq->lock, flags); |
| 212 | /* If the pre-allocated buffer pool is dropping low, schedule to |
| 213 | * refill it */ |
| 214 | if (rxq->free_count <= RX_LOW_WATERMARK) |
| 215 | queue_work(priv->workqueue, &priv->rx_replenish); |
| 216 | |
| 217 | |
| 218 | /* If we've added more space for the firmware to place data, tell it. |
| 219 | * Increment device's write pointer in multiples of 8. */ |
| 220 | if ((write != (rxq->write & ~0x7)) |
| 221 | || (abs(rxq->write - rxq->read) > 7)) { |
| 222 | spin_lock_irqsave(&rxq->lock, flags); |
| 223 | rxq->need_update = 1; |
| 224 | spin_unlock_irqrestore(&rxq->lock, flags); |
| 225 | ret = iwl_rx_queue_update_write_ptr(priv, rxq); |
| 226 | } |
| 227 | |
| 228 | return ret; |
| 229 | } |
| 230 | EXPORT_SYMBOL(iwl_rx_queue_restock); |
| 231 | |
| 232 | |
| 233 | /** |
| 234 | * iwl_rx_replenish - Move all used packet from rx_used to rx_free |
| 235 | * |
| 236 | * When moving to rx_free an SKB is allocated for the slot. |
| 237 | * |
| 238 | * Also restock the Rx queue via iwl_rx_queue_restock. |
| 239 | * This is called as a scheduled work item (except for during initialization) |
| 240 | */ |
| 241 | void iwl_rx_allocate(struct iwl_priv *priv) |
| 242 | { |
| 243 | struct iwl_rx_queue *rxq = &priv->rxq; |
| 244 | struct list_head *element; |
| 245 | struct iwl_rx_mem_buffer *rxb; |
| 246 | unsigned long flags; |
| 247 | spin_lock_irqsave(&rxq->lock, flags); |
| 248 | while (!list_empty(&rxq->rx_used)) { |
| 249 | element = rxq->rx_used.next; |
| 250 | rxb = list_entry(element, struct iwl_rx_mem_buffer, list); |
| 251 | |
| 252 | /* Alloc a new receive buffer */ |
| 253 | rxb->skb = alloc_skb(priv->hw_params.rx_buf_size, |
| 254 | __GFP_NOWARN | GFP_ATOMIC); |
| 255 | if (!rxb->skb) { |
| 256 | if (net_ratelimit()) |
| 257 | printk(KERN_CRIT DRV_NAME |
| 258 | ": Can not allocate SKB buffers\n"); |
| 259 | /* We don't reschedule replenish work here -- we will |
| 260 | * call the restock method and if it still needs |
| 261 | * more buffers it will schedule replenish */ |
| 262 | break; |
| 263 | } |
| 264 | priv->alloc_rxb_skb++; |
| 265 | list_del(element); |
| 266 | |
| 267 | /* Get physical address of RB/SKB */ |
| 268 | rxb->dma_addr = |
| 269 | pci_map_single(priv->pci_dev, rxb->skb->data, |
| 270 | priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE); |
| 271 | list_add_tail(&rxb->list, &rxq->rx_free); |
| 272 | rxq->free_count++; |
| 273 | } |
| 274 | spin_unlock_irqrestore(&rxq->lock, flags); |
| 275 | } |
| 276 | EXPORT_SYMBOL(iwl_rx_allocate); |
| 277 | |
| 278 | void iwl_rx_replenish(struct iwl_priv *priv) |
| 279 | { |
| 280 | unsigned long flags; |
| 281 | |
| 282 | iwl_rx_allocate(priv); |
| 283 | |
| 284 | spin_lock_irqsave(&priv->lock, flags); |
| 285 | iwl_rx_queue_restock(priv); |
| 286 | spin_unlock_irqrestore(&priv->lock, flags); |
| 287 | } |
| 288 | EXPORT_SYMBOL(iwl_rx_replenish); |
| 289 | |
| 290 | |
| 291 | /* Assumes that the skb field of the buffers in 'pool' is kept accurate. |
| 292 | * If an SKB has been detached, the POOL needs to have its SKB set to NULL |
| 293 | * This free routine walks the list of POOL entries and if SKB is set to |
| 294 | * non NULL it is unmapped and freed |
| 295 | */ |
| 296 | void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq) |
| 297 | { |
| 298 | int i; |
| 299 | for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { |
| 300 | if (rxq->pool[i].skb != NULL) { |
| 301 | pci_unmap_single(priv->pci_dev, |
| 302 | rxq->pool[i].dma_addr, |
| 303 | priv->hw_params.rx_buf_size, |
| 304 | PCI_DMA_FROMDEVICE); |
| 305 | dev_kfree_skb(rxq->pool[i].skb); |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd, |
| 310 | rxq->dma_addr); |
| 311 | rxq->bd = NULL; |
| 312 | } |
| 313 | EXPORT_SYMBOL(iwl_rx_queue_free); |
| 314 | |
| 315 | int iwl_rx_queue_alloc(struct iwl_priv *priv) |
| 316 | { |
| 317 | struct iwl_rx_queue *rxq = &priv->rxq; |
| 318 | struct pci_dev *dev = priv->pci_dev; |
| 319 | int i; |
| 320 | |
| 321 | spin_lock_init(&rxq->lock); |
| 322 | INIT_LIST_HEAD(&rxq->rx_free); |
| 323 | INIT_LIST_HEAD(&rxq->rx_used); |
| 324 | |
| 325 | /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */ |
| 326 | rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr); |
| 327 | if (!rxq->bd) |
| 328 | return -ENOMEM; |
| 329 | |
| 330 | /* Fill the rx_used queue with _all_ of the Rx buffers */ |
| 331 | for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) |
| 332 | list_add_tail(&rxq->pool[i].list, &rxq->rx_used); |
| 333 | |
| 334 | /* Set us so that we have processed and used all buffers, but have |
| 335 | * not restocked the Rx queue with fresh buffers */ |
| 336 | rxq->read = rxq->write = 0; |
| 337 | rxq->free_count = 0; |
| 338 | rxq->need_update = 0; |
| 339 | return 0; |
| 340 | } |
| 341 | EXPORT_SYMBOL(iwl_rx_queue_alloc); |
| 342 | |
| 343 | void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq) |
| 344 | { |
| 345 | unsigned long flags; |
| 346 | int i; |
| 347 | spin_lock_irqsave(&rxq->lock, flags); |
| 348 | INIT_LIST_HEAD(&rxq->rx_free); |
| 349 | INIT_LIST_HEAD(&rxq->rx_used); |
| 350 | /* Fill the rx_used queue with _all_ of the Rx buffers */ |
| 351 | for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { |
| 352 | /* In the reset function, these buffers may have been allocated |
| 353 | * to an SKB, so we need to unmap and free potential storage */ |
| 354 | if (rxq->pool[i].skb != NULL) { |
| 355 | pci_unmap_single(priv->pci_dev, |
| 356 | rxq->pool[i].dma_addr, |
| 357 | priv->hw_params.rx_buf_size, |
| 358 | PCI_DMA_FROMDEVICE); |
| 359 | priv->alloc_rxb_skb--; |
| 360 | dev_kfree_skb(rxq->pool[i].skb); |
| 361 | rxq->pool[i].skb = NULL; |
| 362 | } |
| 363 | list_add_tail(&rxq->pool[i].list, &rxq->rx_used); |
| 364 | } |
| 365 | |
| 366 | /* Set us so that we have processed and used all buffers, but have |
| 367 | * not restocked the Rx queue with fresh buffers */ |
| 368 | rxq->read = rxq->write = 0; |
| 369 | rxq->free_count = 0; |
| 370 | spin_unlock_irqrestore(&rxq->lock, flags); |
| 371 | } |
| 372 | EXPORT_SYMBOL(iwl_rx_queue_reset); |
| 373 | |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 374 | int iwl_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq) |
| 375 | { |
| 376 | int ret; |
| 377 | unsigned long flags; |
| 378 | unsigned int rb_size; |
| 379 | |
| 380 | spin_lock_irqsave(&priv->lock, flags); |
| 381 | ret = iwl_grab_nic_access(priv); |
| 382 | if (ret) { |
| 383 | spin_unlock_irqrestore(&priv->lock, flags); |
| 384 | return ret; |
| 385 | } |
| 386 | |
| 387 | if (priv->cfg->mod_params->amsdu_size_8K) |
| 388 | rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; |
| 389 | else |
| 390 | rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; |
| 391 | |
| 392 | /* Stop Rx DMA */ |
| 393 | iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); |
| 394 | |
| 395 | /* Reset driver's Rx queue write index */ |
| 396 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); |
| 397 | |
| 398 | /* Tell device where to find RBD circular buffer in DRAM */ |
| 399 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG, |
| 400 | rxq->dma_addr >> 8); |
| 401 | |
| 402 | /* Tell device where in DRAM to update its Rx status */ |
| 403 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG, |
Ron Rindjunsky | d67f548 | 2008-05-05 10:22:49 +0800 | [diff] [blame] | 404 | (priv->shared_phys + priv->rb_closed_offset) >> 4); |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 405 | |
| 406 | /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */ |
| 407 | iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, |
| 408 | FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | |
| 409 | FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | |
| 410 | rb_size | |
| 411 | /* 0x10 << 4 | */ |
| 412 | (RX_QUEUE_SIZE_LOG << |
| 413 | FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT)); |
| 414 | |
| 415 | /* |
| 416 | * iwl_write32(priv,CSR_INT_COAL_REG,0); |
| 417 | */ |
| 418 | |
| 419 | iwl_release_nic_access(priv); |
| 420 | spin_unlock_irqrestore(&priv->lock, flags); |
| 421 | |
| 422 | return 0; |
| 423 | } |
| 424 | |
Tomas Winkler | b3bbacb | 2008-05-29 16:35:01 +0800 | [diff] [blame] | 425 | int iwl_rxq_stop(struct iwl_priv *priv) |
| 426 | { |
| 427 | int ret; |
| 428 | unsigned long flags; |
| 429 | |
| 430 | spin_lock_irqsave(&priv->lock, flags); |
| 431 | ret = iwl_grab_nic_access(priv); |
| 432 | if (unlikely(ret)) { |
| 433 | spin_unlock_irqrestore(&priv->lock, flags); |
| 434 | return ret; |
| 435 | } |
| 436 | |
| 437 | /* stop Rx DMA */ |
| 438 | iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); |
| 439 | ret = iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG, |
| 440 | (1 << 24), 1000); |
| 441 | if (ret < 0) |
| 442 | IWL_ERROR("Can't stop Rx DMA.\n"); |
| 443 | |
| 444 | iwl_release_nic_access(priv); |
| 445 | spin_unlock_irqrestore(&priv->lock, flags); |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | EXPORT_SYMBOL(iwl_rxq_stop); |
| 450 | |
Tomas Winkler | c135475 | 2008-05-29 16:35:04 +0800 | [diff] [blame] | 451 | void iwl_rx_missed_beacon_notif(struct iwl_priv *priv, |
| 452 | struct iwl_rx_mem_buffer *rxb) |
| 453 | |
| 454 | { |
Tomas Winkler | c135475 | 2008-05-29 16:35:04 +0800 | [diff] [blame] | 455 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; |
| 456 | struct iwl4965_missed_beacon_notif *missed_beacon; |
| 457 | |
| 458 | missed_beacon = &pkt->u.missed_beacon; |
| 459 | if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) { |
| 460 | IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n", |
| 461 | le32_to_cpu(missed_beacon->consequtive_missed_beacons), |
| 462 | le32_to_cpu(missed_beacon->total_missed_becons), |
| 463 | le32_to_cpu(missed_beacon->num_recvd_beacons), |
| 464 | le32_to_cpu(missed_beacon->num_expected_beacons)); |
| 465 | if (!test_bit(STATUS_SCANNING, &priv->status)) |
| 466 | iwl_init_sensitivity(priv); |
| 467 | } |
Tomas Winkler | c135475 | 2008-05-29 16:35:04 +0800 | [diff] [blame] | 468 | } |
| 469 | EXPORT_SYMBOL(iwl_rx_missed_beacon_notif); |
Emmanuel Grumbach | 8f91aec | 2008-06-30 17:23:07 +0800 | [diff] [blame] | 470 | |
Ron Rindjunsky | 0c70515 | 2008-06-30 17:23:12 +0800 | [diff] [blame] | 471 | int iwl_rx_agg_start(struct iwl_priv *priv, const u8 *addr, int tid, u16 ssn) |
| 472 | { |
| 473 | unsigned long flags; |
| 474 | int sta_id; |
| 475 | |
| 476 | sta_id = iwl_find_station(priv, addr); |
| 477 | if (sta_id == IWL_INVALID_STATION) |
| 478 | return -ENXIO; |
| 479 | |
| 480 | spin_lock_irqsave(&priv->sta_lock, flags); |
| 481 | priv->stations[sta_id].sta.station_flags_msk = 0; |
| 482 | priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; |
| 483 | priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid; |
| 484 | priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); |
| 485 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; |
| 486 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
| 487 | |
| 488 | return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, |
| 489 | CMD_ASYNC); |
| 490 | } |
| 491 | EXPORT_SYMBOL(iwl_rx_agg_start); |
| 492 | |
| 493 | int iwl_rx_agg_stop(struct iwl_priv *priv, const u8 *addr, int tid) |
| 494 | { |
| 495 | unsigned long flags; |
| 496 | int sta_id; |
| 497 | |
| 498 | sta_id = iwl_find_station(priv, addr); |
| 499 | if (sta_id == IWL_INVALID_STATION) |
| 500 | return -ENXIO; |
| 501 | |
| 502 | spin_lock_irqsave(&priv->sta_lock, flags); |
| 503 | priv->stations[sta_id].sta.station_flags_msk = 0; |
| 504 | priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; |
| 505 | priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid; |
| 506 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; |
| 507 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
| 508 | |
| 509 | return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, |
| 510 | CMD_ASYNC); |
| 511 | } |
| 512 | EXPORT_SYMBOL(iwl_rx_agg_stop); |
| 513 | |
Emmanuel Grumbach | 8f91aec | 2008-06-30 17:23:07 +0800 | [diff] [blame] | 514 | |
| 515 | /* Calculate noise level, based on measurements during network silence just |
| 516 | * before arriving beacon. This measurement can be done only if we know |
| 517 | * exactly when to expect beacons, therefore only when we're associated. */ |
| 518 | static void iwl_rx_calc_noise(struct iwl_priv *priv) |
| 519 | { |
| 520 | struct statistics_rx_non_phy *rx_info |
| 521 | = &(priv->statistics.rx.general); |
| 522 | int num_active_rx = 0; |
| 523 | int total_silence = 0; |
| 524 | int bcn_silence_a = |
| 525 | le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; |
| 526 | int bcn_silence_b = |
| 527 | le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; |
| 528 | int bcn_silence_c = |
| 529 | le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; |
| 530 | |
| 531 | if (bcn_silence_a) { |
| 532 | total_silence += bcn_silence_a; |
| 533 | num_active_rx++; |
| 534 | } |
| 535 | if (bcn_silence_b) { |
| 536 | total_silence += bcn_silence_b; |
| 537 | num_active_rx++; |
| 538 | } |
| 539 | if (bcn_silence_c) { |
| 540 | total_silence += bcn_silence_c; |
| 541 | num_active_rx++; |
| 542 | } |
| 543 | |
| 544 | /* Average among active antennas */ |
| 545 | if (num_active_rx) |
| 546 | priv->last_rx_noise = (total_silence / num_active_rx) - 107; |
| 547 | else |
| 548 | priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; |
| 549 | |
| 550 | IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", |
| 551 | bcn_silence_a, bcn_silence_b, bcn_silence_c, |
| 552 | priv->last_rx_noise); |
| 553 | } |
| 554 | |
| 555 | #define REG_RECALIB_PERIOD (60) |
| 556 | |
| 557 | void iwl_rx_statistics(struct iwl_priv *priv, |
| 558 | struct iwl_rx_mem_buffer *rxb) |
| 559 | { |
Zhu Yi | 5225640 | 2008-06-30 17:23:31 +0800 | [diff] [blame] | 560 | int change; |
Emmanuel Grumbach | 8f91aec | 2008-06-30 17:23:07 +0800 | [diff] [blame] | 561 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; |
| 562 | |
| 563 | IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n", |
| 564 | (int)sizeof(priv->statistics), pkt->len); |
| 565 | |
Zhu Yi | 5225640 | 2008-06-30 17:23:31 +0800 | [diff] [blame] | 566 | change = ((priv->statistics.general.temperature != |
| 567 | pkt->u.stats.general.temperature) || |
| 568 | ((priv->statistics.flag & |
| 569 | STATISTICS_REPLY_FLG_FAT_MODE_MSK) != |
| 570 | (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK))); |
| 571 | |
Emmanuel Grumbach | 8f91aec | 2008-06-30 17:23:07 +0800 | [diff] [blame] | 572 | memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics)); |
| 573 | |
| 574 | set_bit(STATUS_STATISTICS, &priv->status); |
| 575 | |
| 576 | /* Reschedule the statistics timer to occur in |
| 577 | * REG_RECALIB_PERIOD seconds to ensure we get a |
| 578 | * thermal update even if the uCode doesn't give |
| 579 | * us one */ |
| 580 | mod_timer(&priv->statistics_periodic, jiffies + |
| 581 | msecs_to_jiffies(REG_RECALIB_PERIOD * 1000)); |
| 582 | |
| 583 | if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && |
| 584 | (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) { |
| 585 | iwl_rx_calc_noise(priv); |
| 586 | queue_work(priv->workqueue, &priv->run_time_calib_work); |
| 587 | } |
| 588 | |
| 589 | iwl_leds_background(priv); |
| 590 | |
Zhu Yi | 5225640 | 2008-06-30 17:23:31 +0800 | [diff] [blame] | 591 | if (priv->cfg->ops->lib->temperature && change) |
| 592 | priv->cfg->ops->lib->temperature(priv); |
Emmanuel Grumbach | 8f91aec | 2008-06-30 17:23:07 +0800 | [diff] [blame] | 593 | } |
| 594 | EXPORT_SYMBOL(iwl_rx_statistics); |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 595 | |
| 596 | #define PERFECT_RSSI (-20) /* dBm */ |
| 597 | #define WORST_RSSI (-95) /* dBm */ |
| 598 | #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI) |
| 599 | |
| 600 | /* Calculate an indication of rx signal quality (a percentage, not dBm!). |
| 601 | * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info |
| 602 | * about formulas used below. */ |
| 603 | static int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm) |
| 604 | { |
| 605 | int sig_qual; |
| 606 | int degradation = PERFECT_RSSI - rssi_dbm; |
| 607 | |
| 608 | /* If we get a noise measurement, use signal-to-noise ratio (SNR) |
| 609 | * as indicator; formula is (signal dbm - noise dbm). |
| 610 | * SNR at or above 40 is a great signal (100%). |
| 611 | * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator. |
| 612 | * Weakest usable signal is usually 10 - 15 dB SNR. */ |
| 613 | if (noise_dbm) { |
| 614 | if (rssi_dbm - noise_dbm >= 40) |
| 615 | return 100; |
| 616 | else if (rssi_dbm < noise_dbm) |
| 617 | return 0; |
| 618 | sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2; |
| 619 | |
| 620 | /* Else use just the signal level. |
| 621 | * This formula is a least squares fit of data points collected and |
| 622 | * compared with a reference system that had a percentage (%) display |
| 623 | * for signal quality. */ |
| 624 | } else |
| 625 | sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation * |
| 626 | (15 * RSSI_RANGE + 62 * degradation)) / |
| 627 | (RSSI_RANGE * RSSI_RANGE); |
| 628 | |
| 629 | if (sig_qual > 100) |
| 630 | sig_qual = 100; |
| 631 | else if (sig_qual < 1) |
| 632 | sig_qual = 0; |
| 633 | |
| 634 | return sig_qual; |
| 635 | } |
| 636 | |
| 637 | #ifdef CONFIG_IWLWIFI_DEBUG |
| 638 | |
| 639 | /** |
| 640 | * iwl_dbg_report_frame - dump frame to syslog during debug sessions |
| 641 | * |
| 642 | * You may hack this function to show different aspects of received frames, |
| 643 | * including selective frame dumps. |
| 644 | * group100 parameter selects whether to show 1 out of 100 good frames. |
| 645 | * |
| 646 | * TODO: This was originally written for 3945, need to audit for |
| 647 | * proper operation with 4965. |
| 648 | */ |
| 649 | static void iwl_dbg_report_frame(struct iwl_priv *priv, |
| 650 | struct iwl_rx_packet *pkt, |
| 651 | struct ieee80211_hdr *header, int group100) |
| 652 | { |
| 653 | u32 to_us; |
| 654 | u32 print_summary = 0; |
| 655 | u32 print_dump = 0; /* set to 1 to dump all frames' contents */ |
| 656 | u32 hundred = 0; |
| 657 | u32 dataframe = 0; |
| 658 | __le16 fc; |
| 659 | u16 seq_ctl; |
| 660 | u16 channel; |
| 661 | u16 phy_flags; |
| 662 | int rate_sym; |
| 663 | u16 length; |
| 664 | u16 status; |
| 665 | u16 bcn_tmr; |
| 666 | u32 tsf_low; |
| 667 | u64 tsf; |
| 668 | u8 rssi; |
| 669 | u8 agc; |
| 670 | u16 sig_avg; |
| 671 | u16 noise_diff; |
| 672 | struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt); |
| 673 | struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt); |
| 674 | struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt); |
| 675 | u8 *data = IWL_RX_DATA(pkt); |
| 676 | |
| 677 | if (likely(!(priv->debug_level & IWL_DL_RX))) |
| 678 | return; |
| 679 | |
| 680 | /* MAC header */ |
| 681 | fc = header->frame_control; |
| 682 | seq_ctl = le16_to_cpu(header->seq_ctrl); |
| 683 | |
| 684 | /* metadata */ |
| 685 | channel = le16_to_cpu(rx_hdr->channel); |
| 686 | phy_flags = le16_to_cpu(rx_hdr->phy_flags); |
| 687 | rate_sym = rx_hdr->rate; |
| 688 | length = le16_to_cpu(rx_hdr->len); |
| 689 | |
| 690 | /* end-of-frame status and timestamp */ |
| 691 | status = le32_to_cpu(rx_end->status); |
| 692 | bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp); |
| 693 | tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff; |
| 694 | tsf = le64_to_cpu(rx_end->timestamp); |
| 695 | |
| 696 | /* signal statistics */ |
| 697 | rssi = rx_stats->rssi; |
| 698 | agc = rx_stats->agc; |
| 699 | sig_avg = le16_to_cpu(rx_stats->sig_avg); |
| 700 | noise_diff = le16_to_cpu(rx_stats->noise_diff); |
| 701 | |
| 702 | to_us = !compare_ether_addr(header->addr1, priv->mac_addr); |
| 703 | |
| 704 | /* if data frame is to us and all is good, |
| 705 | * (optionally) print summary for only 1 out of every 100 */ |
| 706 | if (to_us && (fc & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) == |
| 707 | cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) { |
| 708 | dataframe = 1; |
| 709 | if (!group100) |
| 710 | print_summary = 1; /* print each frame */ |
| 711 | else if (priv->framecnt_to_us < 100) { |
| 712 | priv->framecnt_to_us++; |
| 713 | print_summary = 0; |
| 714 | } else { |
| 715 | priv->framecnt_to_us = 0; |
| 716 | print_summary = 1; |
| 717 | hundred = 1; |
| 718 | } |
| 719 | } else { |
| 720 | /* print summary for all other frames */ |
| 721 | print_summary = 1; |
| 722 | } |
| 723 | |
| 724 | if (print_summary) { |
| 725 | char *title; |
| 726 | int rate_idx; |
| 727 | u32 bitrate; |
| 728 | |
| 729 | if (hundred) |
| 730 | title = "100Frames"; |
| 731 | else if (ieee80211_has_retry(fc)) |
| 732 | title = "Retry"; |
| 733 | else if (ieee80211_is_assoc_resp(fc)) |
| 734 | title = "AscRsp"; |
| 735 | else if (ieee80211_is_reassoc_resp(fc)) |
| 736 | title = "RasRsp"; |
| 737 | else if (ieee80211_is_probe_resp(fc)) { |
| 738 | title = "PrbRsp"; |
| 739 | print_dump = 1; /* dump frame contents */ |
| 740 | } else if (ieee80211_is_beacon(fc)) { |
| 741 | title = "Beacon"; |
| 742 | print_dump = 1; /* dump frame contents */ |
| 743 | } else if (ieee80211_is_atim(fc)) |
| 744 | title = "ATIM"; |
| 745 | else if (ieee80211_is_auth(fc)) |
| 746 | title = "Auth"; |
| 747 | else if (ieee80211_is_deauth(fc)) |
| 748 | title = "DeAuth"; |
| 749 | else if (ieee80211_is_disassoc(fc)) |
| 750 | title = "DisAssoc"; |
| 751 | else |
| 752 | title = "Frame"; |
| 753 | |
| 754 | rate_idx = iwl_hwrate_to_plcp_idx(rate_sym); |
| 755 | if (unlikely(rate_idx == -1)) |
| 756 | bitrate = 0; |
| 757 | else |
| 758 | bitrate = iwl_rates[rate_idx].ieee / 2; |
| 759 | |
| 760 | /* print frame summary. |
| 761 | * MAC addresses show just the last byte (for brevity), |
| 762 | * but you can hack it to show more, if you'd like to. */ |
| 763 | if (dataframe) |
| 764 | IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, " |
| 765 | "len=%u, rssi=%d, chnl=%d, rate=%u, \n", |
| 766 | title, le16_to_cpu(fc), header->addr1[5], |
| 767 | length, rssi, channel, bitrate); |
| 768 | else { |
| 769 | /* src/dst addresses assume managed mode */ |
| 770 | IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, " |
| 771 | "src=0x%02x, rssi=%u, tim=%lu usec, " |
| 772 | "phy=0x%02x, chnl=%d\n", |
| 773 | title, le16_to_cpu(fc), header->addr1[5], |
| 774 | header->addr3[5], rssi, |
| 775 | tsf_low - priv->scan_start_tsf, |
| 776 | phy_flags, channel); |
| 777 | } |
| 778 | } |
| 779 | if (print_dump) |
| 780 | iwl_print_hex_dump(priv, IWL_DL_RX, data, length); |
| 781 | } |
| 782 | #else |
| 783 | static inline void iwl_dbg_report_frame(struct iwl_priv *priv, |
| 784 | struct iwl_rx_packet *pkt, |
| 785 | struct ieee80211_hdr *header, |
| 786 | int group100) |
| 787 | { |
| 788 | } |
| 789 | #endif |
| 790 | |
| 791 | static void iwl_add_radiotap(struct iwl_priv *priv, |
| 792 | struct sk_buff *skb, |
| 793 | struct iwl4965_rx_phy_res *rx_start, |
| 794 | struct ieee80211_rx_status *stats, |
| 795 | u32 ampdu_status) |
| 796 | { |
| 797 | s8 signal = stats->signal; |
| 798 | s8 noise = 0; |
| 799 | int rate = stats->rate_idx; |
| 800 | u64 tsf = stats->mactime; |
| 801 | __le16 antenna; |
| 802 | __le16 phy_flags_hw = rx_start->phy_flags; |
| 803 | struct iwl4965_rt_rx_hdr { |
| 804 | struct ieee80211_radiotap_header rt_hdr; |
| 805 | __le64 rt_tsf; /* TSF */ |
| 806 | u8 rt_flags; /* radiotap packet flags */ |
| 807 | u8 rt_rate; /* rate in 500kb/s */ |
| 808 | __le16 rt_channelMHz; /* channel in MHz */ |
| 809 | __le16 rt_chbitmask; /* channel bitfield */ |
| 810 | s8 rt_dbmsignal; /* signal in dBm, kluged to signed */ |
| 811 | s8 rt_dbmnoise; |
| 812 | u8 rt_antenna; /* antenna number */ |
| 813 | } __attribute__ ((packed)) *iwl4965_rt; |
| 814 | |
| 815 | /* TODO: We won't have enough headroom for HT frames. Fix it later. */ |
| 816 | if (skb_headroom(skb) < sizeof(*iwl4965_rt)) { |
| 817 | if (net_ratelimit()) |
| 818 | printk(KERN_ERR "not enough headroom [%d] for " |
| 819 | "radiotap head [%zd]\n", |
| 820 | skb_headroom(skb), sizeof(*iwl4965_rt)); |
| 821 | return; |
| 822 | } |
| 823 | |
| 824 | /* put radiotap header in front of 802.11 header and data */ |
| 825 | iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt)); |
| 826 | |
| 827 | /* initialise radiotap header */ |
| 828 | iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION; |
| 829 | iwl4965_rt->rt_hdr.it_pad = 0; |
| 830 | |
| 831 | /* total header + data */ |
| 832 | put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)), |
| 833 | &iwl4965_rt->rt_hdr.it_len); |
| 834 | |
| 835 | /* Indicate all the fields we add to the radiotap header */ |
| 836 | put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) | |
| 837 | (1 << IEEE80211_RADIOTAP_FLAGS) | |
| 838 | (1 << IEEE80211_RADIOTAP_RATE) | |
| 839 | (1 << IEEE80211_RADIOTAP_CHANNEL) | |
| 840 | (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) | |
| 841 | (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) | |
| 842 | (1 << IEEE80211_RADIOTAP_ANTENNA)), |
| 843 | &iwl4965_rt->rt_hdr.it_present); |
| 844 | |
| 845 | /* Zero the flags, we'll add to them as we go */ |
| 846 | iwl4965_rt->rt_flags = 0; |
| 847 | |
| 848 | put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf); |
| 849 | |
| 850 | iwl4965_rt->rt_dbmsignal = signal; |
| 851 | iwl4965_rt->rt_dbmnoise = noise; |
| 852 | |
| 853 | /* Convert the channel frequency and set the flags */ |
| 854 | put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz); |
| 855 | if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK)) |
| 856 | put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM | |
| 857 | IEEE80211_CHAN_5GHZ), |
| 858 | &iwl4965_rt->rt_chbitmask); |
| 859 | else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK) |
| 860 | put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK | |
| 861 | IEEE80211_CHAN_2GHZ), |
| 862 | &iwl4965_rt->rt_chbitmask); |
| 863 | else /* 802.11g */ |
| 864 | put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM | |
| 865 | IEEE80211_CHAN_2GHZ), |
| 866 | &iwl4965_rt->rt_chbitmask); |
| 867 | |
| 868 | if (rate == -1) |
| 869 | iwl4965_rt->rt_rate = 0; |
| 870 | else |
| 871 | iwl4965_rt->rt_rate = iwl_rates[rate].ieee; |
| 872 | |
| 873 | /* |
| 874 | * "antenna number" |
| 875 | * |
| 876 | * It seems that the antenna field in the phy flags value |
| 877 | * is actually a bitfield. This is undefined by radiotap, |
| 878 | * it wants an actual antenna number but I always get "7" |
| 879 | * for most legacy frames I receive indicating that the |
| 880 | * same frame was received on all three RX chains. |
| 881 | * |
| 882 | * I think this field should be removed in favour of a |
| 883 | * new 802.11n radiotap field "RX chains" that is defined |
| 884 | * as a bitmask. |
| 885 | */ |
| 886 | antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK; |
| 887 | iwl4965_rt->rt_antenna = le16_to_cpu(antenna) >> 4; |
| 888 | |
| 889 | /* set the preamble flag if appropriate */ |
| 890 | if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) |
| 891 | iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; |
| 892 | |
| 893 | stats->flag |= RX_FLAG_RADIOTAP; |
| 894 | } |
| 895 | |
| 896 | static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len) |
| 897 | { |
| 898 | /* 0 - mgmt, 1 - cnt, 2 - data */ |
| 899 | int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2; |
| 900 | priv->rx_stats[idx].cnt++; |
| 901 | priv->rx_stats[idx].bytes += len; |
| 902 | } |
| 903 | |
| 904 | /* |
| 905 | * returns non-zero if packet should be dropped |
| 906 | */ |
| 907 | static int iwl_set_decrypted_flag(struct iwl_priv *priv, |
| 908 | struct ieee80211_hdr *hdr, |
| 909 | u32 decrypt_res, |
| 910 | struct ieee80211_rx_status *stats) |
| 911 | { |
| 912 | u16 fc = le16_to_cpu(hdr->frame_control); |
| 913 | |
| 914 | if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK) |
| 915 | return 0; |
| 916 | |
| 917 | if (!(fc & IEEE80211_FCTL_PROTECTED)) |
| 918 | return 0; |
| 919 | |
| 920 | IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res); |
| 921 | switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) { |
| 922 | case RX_RES_STATUS_SEC_TYPE_TKIP: |
| 923 | /* The uCode has got a bad phase 1 Key, pushes the packet. |
| 924 | * Decryption will be done in SW. */ |
| 925 | if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == |
| 926 | RX_RES_STATUS_BAD_KEY_TTAK) |
| 927 | break; |
| 928 | |
| 929 | case RX_RES_STATUS_SEC_TYPE_WEP: |
| 930 | if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == |
| 931 | RX_RES_STATUS_BAD_ICV_MIC) { |
| 932 | /* bad ICV, the packet is destroyed since the |
| 933 | * decryption is inplace, drop it */ |
| 934 | IWL_DEBUG_RX("Packet destroyed\n"); |
| 935 | return -1; |
| 936 | } |
| 937 | case RX_RES_STATUS_SEC_TYPE_CCMP: |
| 938 | if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == |
| 939 | RX_RES_STATUS_DECRYPT_OK) { |
| 940 | IWL_DEBUG_RX("hw decrypt successfully!!!\n"); |
| 941 | stats->flag |= RX_FLAG_DECRYPTED; |
| 942 | } |
| 943 | break; |
| 944 | |
| 945 | default: |
| 946 | break; |
| 947 | } |
| 948 | return 0; |
| 949 | } |
| 950 | |
| 951 | static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in) |
| 952 | { |
| 953 | u32 decrypt_out = 0; |
| 954 | |
| 955 | if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == |
| 956 | RX_RES_STATUS_STATION_FOUND) |
| 957 | decrypt_out |= (RX_RES_STATUS_STATION_FOUND | |
| 958 | RX_RES_STATUS_NO_STATION_INFO_MISMATCH); |
| 959 | |
| 960 | decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); |
| 961 | |
| 962 | /* packet was not encrypted */ |
| 963 | if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == |
| 964 | RX_RES_STATUS_SEC_TYPE_NONE) |
| 965 | return decrypt_out; |
| 966 | |
| 967 | /* packet was encrypted with unknown alg */ |
| 968 | if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == |
| 969 | RX_RES_STATUS_SEC_TYPE_ERR) |
| 970 | return decrypt_out; |
| 971 | |
| 972 | /* decryption was not done in HW */ |
| 973 | if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != |
| 974 | RX_MPDU_RES_STATUS_DEC_DONE_MSK) |
| 975 | return decrypt_out; |
| 976 | |
| 977 | switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { |
| 978 | |
| 979 | case RX_RES_STATUS_SEC_TYPE_CCMP: |
| 980 | /* alg is CCM: check MIC only */ |
| 981 | if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) |
| 982 | /* Bad MIC */ |
| 983 | decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; |
| 984 | else |
| 985 | decrypt_out |= RX_RES_STATUS_DECRYPT_OK; |
| 986 | |
| 987 | break; |
| 988 | |
| 989 | case RX_RES_STATUS_SEC_TYPE_TKIP: |
| 990 | if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { |
| 991 | /* Bad TTAK */ |
| 992 | decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; |
| 993 | break; |
| 994 | } |
| 995 | /* fall through if TTAK OK */ |
| 996 | default: |
| 997 | if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) |
| 998 | decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; |
| 999 | else |
| 1000 | decrypt_out |= RX_RES_STATUS_DECRYPT_OK; |
| 1001 | break; |
| 1002 | }; |
| 1003 | |
| 1004 | IWL_DEBUG_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", |
| 1005 | decrypt_in, decrypt_out); |
| 1006 | |
| 1007 | return decrypt_out; |
| 1008 | } |
| 1009 | |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1010 | static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv, |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1011 | int include_phy, |
| 1012 | struct iwl_rx_mem_buffer *rxb, |
| 1013 | struct ieee80211_rx_status *stats) |
| 1014 | { |
| 1015 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; |
| 1016 | struct iwl4965_rx_phy_res *rx_start = (include_phy) ? |
| 1017 | (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL; |
| 1018 | struct ieee80211_hdr *hdr; |
| 1019 | u16 len; |
| 1020 | __le32 *rx_end; |
| 1021 | unsigned int skblen; |
| 1022 | u32 ampdu_status; |
| 1023 | u32 ampdu_status_legacy; |
| 1024 | |
| 1025 | if (!include_phy && priv->last_phy_res[0]) |
| 1026 | rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1]; |
| 1027 | |
| 1028 | if (!rx_start) { |
| 1029 | IWL_ERROR("MPDU frame without a PHY data\n"); |
| 1030 | return; |
| 1031 | } |
| 1032 | if (include_phy) { |
| 1033 | hdr = (struct ieee80211_hdr *)((u8 *) &rx_start[1] + |
| 1034 | rx_start->cfg_phy_cnt); |
| 1035 | |
| 1036 | len = le16_to_cpu(rx_start->byte_count); |
| 1037 | |
| 1038 | rx_end = (__le32 *) ((u8 *) &pkt->u.raw[0] + |
| 1039 | sizeof(struct iwl4965_rx_phy_res) + |
| 1040 | rx_start->cfg_phy_cnt + len); |
| 1041 | |
| 1042 | } else { |
| 1043 | struct iwl4965_rx_mpdu_res_start *amsdu = |
| 1044 | (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw; |
| 1045 | |
| 1046 | hdr = (struct ieee80211_hdr *)(pkt->u.raw + |
| 1047 | sizeof(struct iwl4965_rx_mpdu_res_start)); |
| 1048 | len = le16_to_cpu(amsdu->byte_count); |
| 1049 | rx_start->byte_count = amsdu->byte_count; |
| 1050 | rx_end = (__le32 *) (((u8 *) hdr) + len); |
| 1051 | } |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1052 | |
| 1053 | ampdu_status = le32_to_cpu(*rx_end); |
| 1054 | skblen = ((u8 *) rx_end - (u8 *) &pkt->u.raw[0]) + sizeof(u32); |
| 1055 | |
| 1056 | if (!include_phy) { |
| 1057 | /* New status scheme, need to translate */ |
| 1058 | ampdu_status_legacy = ampdu_status; |
| 1059 | ampdu_status = iwl_translate_rx_status(priv, ampdu_status); |
| 1060 | } |
| 1061 | |
| 1062 | /* start from MAC */ |
| 1063 | skb_reserve(rxb->skb, (void *)hdr - (void *)pkt); |
| 1064 | skb_put(rxb->skb, len); /* end where data ends */ |
| 1065 | |
| 1066 | /* We only process data packets if the interface is open */ |
| 1067 | if (unlikely(!priv->is_open)) { |
| 1068 | IWL_DEBUG_DROP_LIMIT |
| 1069 | ("Dropping packet while interface is not open.\n"); |
| 1070 | return; |
| 1071 | } |
| 1072 | |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1073 | hdr = (struct ieee80211_hdr *)rxb->skb->data; |
| 1074 | |
| 1075 | /* in case of HW accelerated crypto and bad decryption, drop */ |
| 1076 | if (!priv->hw_params.sw_crypto && |
| 1077 | iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats)) |
| 1078 | return; |
| 1079 | |
| 1080 | if (priv->add_radiotap) |
| 1081 | iwl_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status); |
| 1082 | |
| 1083 | iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len); |
| 1084 | ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats); |
| 1085 | priv->alloc_rxb_skb--; |
| 1086 | rxb->skb = NULL; |
| 1087 | } |
| 1088 | |
| 1089 | /* Calc max signal level (dBm) among 3 possible receivers */ |
| 1090 | static int iwl_calc_rssi(struct iwl_priv *priv, |
| 1091 | struct iwl4965_rx_phy_res *rx_resp) |
| 1092 | { |
| 1093 | /* data from PHY/DSP regarding signal strength, etc., |
| 1094 | * contents are always there, not configurable by host. */ |
| 1095 | struct iwl4965_rx_non_cfg_phy *ncphy = |
| 1096 | (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy; |
| 1097 | u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK) |
| 1098 | >> IWL_AGC_DB_POS; |
| 1099 | |
| 1100 | u32 valid_antennae = |
| 1101 | (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK) |
| 1102 | >> RX_PHY_FLAGS_ANTENNAE_OFFSET; |
| 1103 | u8 max_rssi = 0; |
| 1104 | u32 i; |
| 1105 | |
| 1106 | /* Find max rssi among 3 possible receivers. |
| 1107 | * These values are measured by the digital signal processor (DSP). |
| 1108 | * They should stay fairly constant even as the signal strength varies, |
| 1109 | * if the radio's automatic gain control (AGC) is working right. |
| 1110 | * AGC value (see below) will provide the "interesting" info. */ |
| 1111 | for (i = 0; i < 3; i++) |
| 1112 | if (valid_antennae & (1 << i)) |
| 1113 | max_rssi = max(ncphy->rssi_info[i << 1], max_rssi); |
| 1114 | |
| 1115 | IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n", |
| 1116 | ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4], |
| 1117 | max_rssi, agc); |
| 1118 | |
| 1119 | /* dBm = max_rssi dB - agc dB - constant. |
| 1120 | * Higher AGC (higher radio gain) means lower signal. */ |
| 1121 | return max_rssi - agc - IWL_RSSI_OFFSET; |
| 1122 | } |
| 1123 | |
| 1124 | static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) |
| 1125 | { |
| 1126 | unsigned long flags; |
| 1127 | |
| 1128 | spin_lock_irqsave(&priv->sta_lock, flags); |
| 1129 | priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK; |
| 1130 | priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK; |
| 1131 | priv->stations[sta_id].sta.sta.modify_mask = 0; |
| 1132 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; |
| 1133 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
| 1134 | |
| 1135 | iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC); |
| 1136 | } |
| 1137 | |
| 1138 | static void iwl_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr) |
| 1139 | { |
| 1140 | /* FIXME: need locking over ps_status ??? */ |
| 1141 | u8 sta_id = iwl_find_station(priv, addr); |
| 1142 | |
| 1143 | if (sta_id != IWL_INVALID_STATION) { |
| 1144 | u8 sta_awake = priv->stations[sta_id]. |
| 1145 | ps_status == STA_PS_STATUS_WAKE; |
| 1146 | |
| 1147 | if (sta_awake && ps_bit) |
| 1148 | priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP; |
| 1149 | else if (!sta_awake && !ps_bit) { |
| 1150 | iwl_sta_modify_ps_wake(priv, sta_id); |
| 1151 | priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE; |
| 1152 | } |
| 1153 | } |
| 1154 | } |
| 1155 | |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1156 | /* This is necessary only for a number of statistics, see the caller. */ |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1157 | static int iwl_is_network_packet(struct iwl_priv *priv, |
| 1158 | struct ieee80211_hdr *header) |
| 1159 | { |
| 1160 | /* Filter incoming packets to determine if they are targeted toward |
| 1161 | * this network, discarding packets coming from ourselves */ |
| 1162 | switch (priv->iw_mode) { |
| 1163 | case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */ |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1164 | /* packets to our IBSS update information */ |
| 1165 | return !compare_ether_addr(header->addr3, priv->bssid); |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1166 | case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */ |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1167 | /* packets to our IBSS update information */ |
| 1168 | return !compare_ether_addr(header->addr2, priv->bssid); |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1169 | default: |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1170 | return 1; |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1171 | } |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1172 | } |
| 1173 | |
| 1174 | /* Called for REPLY_RX (legacy ABG frames), or |
| 1175 | * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */ |
| 1176 | void iwl_rx_reply_rx(struct iwl_priv *priv, |
| 1177 | struct iwl_rx_mem_buffer *rxb) |
| 1178 | { |
| 1179 | struct ieee80211_hdr *header; |
| 1180 | struct ieee80211_rx_status rx_status; |
| 1181 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; |
| 1182 | /* Use phy data (Rx signal strength, etc.) contained within |
| 1183 | * this rx packet for legacy frames, |
| 1184 | * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */ |
| 1185 | int include_phy = (pkt->hdr.cmd == REPLY_RX); |
| 1186 | struct iwl4965_rx_phy_res *rx_start = (include_phy) ? |
| 1187 | (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : |
| 1188 | (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1]; |
| 1189 | __le32 *rx_end; |
| 1190 | unsigned int len = 0; |
| 1191 | u16 fc; |
| 1192 | u8 network_packet; |
| 1193 | |
| 1194 | rx_status.mactime = le64_to_cpu(rx_start->timestamp); |
| 1195 | rx_status.freq = |
| 1196 | ieee80211_channel_to_frequency(le16_to_cpu(rx_start->channel)); |
| 1197 | rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? |
| 1198 | IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; |
| 1199 | rx_status.rate_idx = |
| 1200 | iwl_hwrate_to_plcp_idx(le32_to_cpu(rx_start->rate_n_flags)); |
| 1201 | if (rx_status.band == IEEE80211_BAND_5GHZ) |
| 1202 | rx_status.rate_idx -= IWL_FIRST_OFDM_RATE; |
| 1203 | |
| 1204 | rx_status.antenna = 0; |
| 1205 | rx_status.flag = 0; |
Assaf Krauss | 2ff75b7 | 2008-06-30 17:23:17 +0800 | [diff] [blame] | 1206 | rx_status.flag |= RX_FLAG_TSFT; |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1207 | |
| 1208 | if ((unlikely(rx_start->cfg_phy_cnt > 20))) { |
| 1209 | IWL_DEBUG_DROP("dsp size out of range [0,20]: %d/n", |
| 1210 | rx_start->cfg_phy_cnt); |
| 1211 | return; |
| 1212 | } |
| 1213 | |
| 1214 | if (!include_phy) { |
| 1215 | if (priv->last_phy_res[0]) |
| 1216 | rx_start = (struct iwl4965_rx_phy_res *) |
| 1217 | &priv->last_phy_res[1]; |
| 1218 | else |
| 1219 | rx_start = NULL; |
| 1220 | } |
| 1221 | |
| 1222 | if (!rx_start) { |
| 1223 | IWL_ERROR("MPDU frame without a PHY data\n"); |
| 1224 | return; |
| 1225 | } |
| 1226 | |
| 1227 | if (include_phy) { |
| 1228 | header = (struct ieee80211_hdr *)((u8 *) &rx_start[1] |
| 1229 | + rx_start->cfg_phy_cnt); |
| 1230 | |
| 1231 | len = le16_to_cpu(rx_start->byte_count); |
| 1232 | rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt + |
| 1233 | sizeof(struct iwl4965_rx_phy_res) + len); |
| 1234 | } else { |
| 1235 | struct iwl4965_rx_mpdu_res_start *amsdu = |
| 1236 | (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw; |
| 1237 | |
| 1238 | header = (void *)(pkt->u.raw + |
| 1239 | sizeof(struct iwl4965_rx_mpdu_res_start)); |
| 1240 | len = le16_to_cpu(amsdu->byte_count); |
| 1241 | rx_end = (__le32 *) (pkt->u.raw + |
| 1242 | sizeof(struct iwl4965_rx_mpdu_res_start) + len); |
| 1243 | } |
| 1244 | |
| 1245 | if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) || |
| 1246 | !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) { |
| 1247 | IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", |
| 1248 | le32_to_cpu(*rx_end)); |
| 1249 | return; |
| 1250 | } |
| 1251 | |
| 1252 | priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp); |
| 1253 | |
| 1254 | /* Find max signal strength (dBm) among 3 antenna/receiver chains */ |
| 1255 | rx_status.signal = iwl_calc_rssi(priv, rx_start); |
| 1256 | |
| 1257 | /* Meaningful noise values are available only from beacon statistics, |
| 1258 | * which are gathered only when associated, and indicate noise |
| 1259 | * only for the associated network channel ... |
| 1260 | * Ignore these noise values while scanning (other channels) */ |
| 1261 | if (iwl_is_associated(priv) && |
| 1262 | !test_bit(STATUS_SCANNING, &priv->status)) { |
| 1263 | rx_status.noise = priv->last_rx_noise; |
| 1264 | rx_status.qual = iwl_calc_sig_qual(rx_status.signal, |
| 1265 | rx_status.noise); |
| 1266 | } else { |
| 1267 | rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE; |
| 1268 | rx_status.qual = iwl_calc_sig_qual(rx_status.signal, 0); |
| 1269 | } |
| 1270 | |
| 1271 | /* Reset beacon noise level if not associated. */ |
| 1272 | if (!iwl_is_associated(priv)) |
| 1273 | priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; |
| 1274 | |
| 1275 | /* Set "1" to report good data frames in groups of 100 */ |
| 1276 | /* FIXME: need to optimze the call: */ |
| 1277 | iwl_dbg_report_frame(priv, pkt, header, 1); |
| 1278 | |
| 1279 | IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n", |
| 1280 | rx_status.signal, rx_status.noise, rx_status.signal, |
| 1281 | (unsigned long long)rx_status.mactime); |
| 1282 | |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1283 | /* Take shortcut when only in monitor mode */ |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1284 | if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) { |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1285 | iwl_pass_packet_to_mac80211(priv, include_phy, |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1286 | rxb, &rx_status); |
| 1287 | return; |
| 1288 | } |
| 1289 | |
| 1290 | network_packet = iwl_is_network_packet(priv, header); |
| 1291 | if (network_packet) { |
| 1292 | priv->last_rx_rssi = rx_status.signal; |
| 1293 | priv->last_beacon_time = priv->ucode_beacon_time; |
| 1294 | priv->last_tsf = le64_to_cpu(rx_start->timestamp); |
| 1295 | } |
| 1296 | |
| 1297 | fc = le16_to_cpu(header->frame_control); |
| 1298 | switch (fc & IEEE80211_FCTL_FTYPE) { |
| 1299 | case IEEE80211_FTYPE_MGMT: |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1300 | case IEEE80211_FTYPE_DATA: |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1301 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) |
| 1302 | iwl_update_ps_mode(priv, fc & IEEE80211_FCTL_PM, |
| 1303 | header->addr2); |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1304 | /* fall through */ |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1305 | default: |
Emmanuel Grumbach | 4b8817b | 2008-06-30 17:23:10 +0800 | [diff] [blame] | 1306 | iwl_pass_packet_to_mac80211(priv, include_phy, rxb, |
| 1307 | &rx_status); |
Emmanuel Grumbach | 1781a07 | 2008-06-30 17:23:09 +0800 | [diff] [blame] | 1308 | break; |
| 1309 | |
| 1310 | } |
| 1311 | } |
| 1312 | EXPORT_SYMBOL(iwl_rx_reply_rx); |
| 1313 | |
| 1314 | /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD). |
| 1315 | * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */ |
| 1316 | void iwl_rx_reply_rx_phy(struct iwl_priv *priv, |
| 1317 | struct iwl_rx_mem_buffer *rxb) |
| 1318 | { |
| 1319 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; |
| 1320 | priv->last_phy_res[0] = 1; |
| 1321 | memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]), |
| 1322 | sizeof(struct iwl4965_rx_phy_res)); |
| 1323 | } |
| 1324 | EXPORT_SYMBOL(iwl_rx_reply_rx_phy); |