/******************************************************************************
*
- * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
+ * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
*****************************************************************************/
#include <linux/etherdevice.h>
+#include <linux/slab.h>
#include <net/mac80211.h>
#include <asm/unaligned.h>
#include "iwl-eeprom.h"
/**
* iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
*/
-int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
+void iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
{
unsigned long flags;
u32 rx_wrt_ptr_reg = priv->hw_params.rx_wrt_ptr_reg;
u32 reg;
- int ret = 0;
spin_lock_irqsave(&q->lock, flags);
reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
+ IWL_DEBUG_INFO(priv, "Rx queue requesting wakeup, GP1 = 0x%x\n",
+ reg);
iwl_set_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
goto exit_unlock;
exit_unlock:
spin_unlock_irqrestore(&q->lock, flags);
- return ret;
}
EXPORT_SYMBOL(iwl_rx_queue_update_write_ptr);
-/**
- * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
- */
-static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
- dma_addr_t dma_addr)
-{
- return cpu_to_le32((u32)(dma_addr >> 8));
-}
-
-/**
- * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
- *
- * If there are slots in the RX queue that need to be restocked,
- * and we have free pre-allocated buffers, fill the ranks as much
- * as we can, pulling from rx_free.
- *
- * This moves the 'write' index forward to catch up with 'processed', and
- * also updates the memory address in the firmware to reference the new
- * target buffer.
- */
-int iwl_rx_queue_restock(struct iwl_priv *priv)
-{
- struct iwl_rx_queue *rxq = &priv->rxq;
- struct list_head *element;
- struct iwl_rx_mem_buffer *rxb;
- unsigned long flags;
- int write;
- int ret = 0;
-
- spin_lock_irqsave(&rxq->lock, flags);
- write = rxq->write & ~0x7;
- while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
- /* Get next free Rx buffer, remove from free list */
- element = rxq->rx_free.next;
- rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
- list_del(element);
-
- /* Point to Rx buffer via next RBD in circular buffer */
- rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->page_dma);
- rxq->queue[rxq->write] = rxb;
- rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
- rxq->free_count--;
- }
- spin_unlock_irqrestore(&rxq->lock, flags);
- /* If the pre-allocated buffer pool is dropping low, schedule to
- * refill it */
- if (rxq->free_count <= RX_LOW_WATERMARK)
- queue_work(priv->workqueue, &priv->rx_replenish);
-
-
- /* If we've added more space for the firmware to place data, tell it.
- * Increment device's write pointer in multiples of 8. */
- if (rxq->write_actual != (rxq->write & ~0x7)) {
- spin_lock_irqsave(&rxq->lock, flags);
- rxq->need_update = 1;
- spin_unlock_irqrestore(&rxq->lock, flags);
- ret = iwl_rx_queue_update_write_ptr(priv, rxq);
- }
-
- return ret;
-}
-EXPORT_SYMBOL(iwl_rx_queue_restock);
-
-
-/**
- * iwl_rx_replenish - Move all used packet from rx_used to rx_free
- *
- * When moving to rx_free an SKB is allocated for the slot.
- *
- * Also restock the Rx queue via iwl_rx_queue_restock.
- * This is called as a scheduled work item (except for during initialization)
- */
-void iwl_rx_allocate(struct iwl_priv *priv, gfp_t priority)
-{
- struct iwl_rx_queue *rxq = &priv->rxq;
- struct list_head *element;
- struct iwl_rx_mem_buffer *rxb;
- struct page *page;
- unsigned long flags;
- gfp_t gfp_mask = priority;
-
- while (1) {
- spin_lock_irqsave(&rxq->lock, flags);
- if (list_empty(&rxq->rx_used)) {
- spin_unlock_irqrestore(&rxq->lock, flags);
- return;
- }
- spin_unlock_irqrestore(&rxq->lock, flags);
-
- if (rxq->free_count > RX_LOW_WATERMARK)
- gfp_mask |= __GFP_NOWARN;
-
- if (priv->hw_params.rx_page_order > 0)
- gfp_mask |= __GFP_COMP;
-
- /* Alloc a new receive buffer */
- page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
- if (!page) {
- if (net_ratelimit())
- IWL_DEBUG_INFO(priv, "alloc_pages failed, "
- "order: %d\n",
- priv->hw_params.rx_page_order);
-
- if ((rxq->free_count <= RX_LOW_WATERMARK) &&
- net_ratelimit())
- IWL_CRIT(priv, "Failed to alloc_pages with %s. Only %u free buffers remaining.\n",
- priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
- rxq->free_count);
- /* We don't reschedule replenish work here -- we will
- * call the restock method and if it still needs
- * more buffers it will schedule replenish */
- return;
- }
-
- spin_lock_irqsave(&rxq->lock, flags);
-
- if (list_empty(&rxq->rx_used)) {
- spin_unlock_irqrestore(&rxq->lock, flags);
- __free_pages(page, priv->hw_params.rx_page_order);
- return;
- }
- element = rxq->rx_used.next;
- rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
- list_del(element);
-
- spin_unlock_irqrestore(&rxq->lock, flags);
-
- rxb->page = page;
- /* Get physical address of the RB */
- rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
- PAGE_SIZE << priv->hw_params.rx_page_order,
- PCI_DMA_FROMDEVICE);
- /* dma address must be no more than 36 bits */
- BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36));
- /* and also 256 byte aligned! */
- BUG_ON(rxb->page_dma & DMA_BIT_MASK(8));
-
- spin_lock_irqsave(&rxq->lock, flags);
-
- list_add_tail(&rxb->list, &rxq->rx_free);
- rxq->free_count++;
- priv->alloc_rxb_page++;
-
- spin_unlock_irqrestore(&rxq->lock, flags);
- }
-}
-
-void iwl_rx_replenish(struct iwl_priv *priv)
-{
- unsigned long flags;
-
- iwl_rx_allocate(priv, GFP_KERNEL);
-
- spin_lock_irqsave(&priv->lock, flags);
- iwl_rx_queue_restock(priv);
- spin_unlock_irqrestore(&priv->lock, flags);
-}
-EXPORT_SYMBOL(iwl_rx_replenish);
-
-void iwl_rx_replenish_now(struct iwl_priv *priv)
-{
- iwl_rx_allocate(priv, GFP_ATOMIC);
-
- iwl_rx_queue_restock(priv);
-}
-EXPORT_SYMBOL(iwl_rx_replenish_now);
-
-
-/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
- * If an SKB has been detached, the POOL needs to have its SKB set to NULL
- * This free routine walks the list of POOL entries and if SKB is set to
- * non NULL it is unmapped and freed
- */
-void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
-{
- int i;
- for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
- if (rxq->pool[i].page != NULL) {
- pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
- PAGE_SIZE << priv->hw_params.rx_page_order,
- PCI_DMA_FROMDEVICE);
- __free_pages(rxq->pool[i].page,
- priv->hw_params.rx_page_order);
- rxq->pool[i].page = NULL;
- priv->alloc_rxb_page--;
- }
- }
-
- pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
- rxq->dma_addr);
- pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
- rxq->rb_stts, rxq->rb_stts_dma);
- rxq->bd = NULL;
- rxq->rb_stts = NULL;
-}
-EXPORT_SYMBOL(iwl_rx_queue_free);
int iwl_rx_queue_alloc(struct iwl_priv *priv)
{
struct iwl_rx_queue *rxq = &priv->rxq;
- struct pci_dev *dev = priv->pci_dev;
+ struct device *dev = &priv->pci_dev->dev;
int i;
spin_lock_init(&rxq->lock);
INIT_LIST_HEAD(&rxq->rx_used);
/* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
- rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
+ rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr,
+ GFP_KERNEL);
if (!rxq->bd)
goto err_bd;
- rxq->rb_stts = pci_alloc_consistent(dev, sizeof(struct iwl_rb_status),
- &rxq->rb_stts_dma);
+ rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct iwl_rb_status),
+ &rxq->rb_stts_dma, GFP_KERNEL);
if (!rxq->rb_stts)
goto err_rb;
return 0;
err_rb:
- pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
- rxq->dma_addr);
+ dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
+ rxq->dma_addr);
err_bd:
return -ENOMEM;
}
EXPORT_SYMBOL(iwl_rx_queue_alloc);
-void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
-{
- unsigned long flags;
- int i;
- spin_lock_irqsave(&rxq->lock, flags);
- INIT_LIST_HEAD(&rxq->rx_free);
- INIT_LIST_HEAD(&rxq->rx_used);
- /* Fill the rx_used queue with _all_ of the Rx buffers */
- for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
- /* In the reset function, these buffers may have been allocated
- * to an SKB, so we need to unmap and free potential storage */
- if (rxq->pool[i].page != NULL) {
- pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
- PAGE_SIZE << priv->hw_params.rx_page_order,
- PCI_DMA_FROMDEVICE);
- priv->alloc_rxb_page--;
- __free_pages(rxq->pool[i].page,
- priv->hw_params.rx_page_order);
- rxq->pool[i].page = NULL;
- }
- list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
- }
-
- /* Set us so that we have processed and used all buffers, but have
- * not restocked the Rx queue with fresh buffers */
- rxq->read = rxq->write = 0;
- rxq->write_actual = 0;
- rxq->free_count = 0;
- spin_unlock_irqrestore(&rxq->lock, flags);
-}
-
-int iwl_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
-{
- u32 rb_size;
- const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
- u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT for all devices? */
-
- if (!priv->cfg->use_isr_legacy)
- rb_timeout = RX_RB_TIMEOUT;
-
- if (priv->cfg->mod_params->amsdu_size_8K)
- rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
- else
- rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
-
- /* Stop Rx DMA */
- iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
-
- /* Reset driver's Rx queue write index */
- iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
-
- /* Tell device where to find RBD circular buffer in DRAM */
- iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
- (u32)(rxq->dma_addr >> 8));
-
- /* Tell device where in DRAM to update its Rx status */
- iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
- rxq->rb_stts_dma >> 4);
-
- /* Enable Rx DMA
- * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in
- * the credit mechanism in 5000 HW RX FIFO
- * Direct rx interrupts to hosts
- * Rx buffer size 4 or 8k
- * RB timeout 0x10
- * 256 RBDs
- */
- iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
- FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
- FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
- FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
- FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
- rb_size|
- (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
- (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
-
- iwl_write32(priv, CSR_INT_COALESCING, 0x40);
-
- return 0;
-}
-
-int iwl_rxq_stop(struct iwl_priv *priv)
-{
-
- /* stop Rx DMA */
- iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
- iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
- FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
-
- return 0;
-}
-EXPORT_SYMBOL(iwl_rxq_stop);
-
void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
struct iwl_missed_beacon_notif *missed_beacon;
missed_beacon = &pkt->u.missed_beacon;
- if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
+ if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
+ priv->missed_beacon_threshold) {
IWL_DEBUG_CALIB(priv, "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
- le32_to_cpu(missed_beacon->consequtive_missed_beacons),
+ le32_to_cpu(missed_beacon->consecutive_missed_beacons),
le32_to_cpu(missed_beacon->total_missed_becons),
le32_to_cpu(missed_beacon->num_recvd_beacons),
le32_to_cpu(missed_beacon->num_expected_beacons));
}
EXPORT_SYMBOL(iwl_rx_missed_beacon_notif);
+void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
+ struct iwl_rx_mem_buffer *rxb)
+{
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
+
+ if (!report->state) {
+ IWL_DEBUG_11H(priv,
+ "Spectrum Measure Notification: Start\n");
+ return;
+ }
+
+ memcpy(&priv->measure_report, report, sizeof(*report));
+ priv->measurement_status |= MEASUREMENT_READY;
+}
+EXPORT_SYMBOL(iwl_rx_spectrum_measure_notif);
+
+
/* Calculate noise level, based on measurements during network silence just
* before arriving beacon. This measurement can be done only if we know
le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
int bcn_silence_c =
le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
+ int last_rx_noise;
if (bcn_silence_a) {
total_silence += bcn_silence_a;
/* Average among active antennas */
if (num_active_rx)
- priv->last_rx_noise = (total_silence / num_active_rx) - 107;
+ last_rx_noise = (total_silence / num_active_rx) - 107;
else
- priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
+ last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
bcn_silence_a, bcn_silence_b, bcn_silence_c,
- priv->last_rx_noise);
+ last_rx_noise);
}
#ifdef CONFIG_IWLWIFI_DEBUG
int i;
__le32 *prev_stats;
u32 *accum_stats;
+ u32 *delta, *max_delta;
prev_stats = (__le32 *)&priv->statistics;
accum_stats = (u32 *)&priv->accum_statistics;
+ delta = (u32 *)&priv->delta_statistics;
+ max_delta = (u32 *)&priv->max_delta;
for (i = sizeof(__le32); i < sizeof(struct iwl_notif_statistics);
- i += sizeof(__le32), stats++, prev_stats++, accum_stats++)
- if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats))
- *accum_stats += (le32_to_cpu(*stats) -
+ i += sizeof(__le32), stats++, prev_stats++, delta++,
+ max_delta++, accum_stats++) {
+ if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
+ *delta = (le32_to_cpu(*stats) -
le32_to_cpu(*prev_stats));
+ *accum_stats += *delta;
+ if (*delta > *max_delta)
+ *max_delta = *delta;
+ }
+ }
/* reset accumulative statistics for "no-counter" type statistics */
priv->accum_statistics.general.temperature =
#define REG_RECALIB_PERIOD (60)
+/**
+ * iwl_good_plcp_health - checks for plcp error.
+ *
+ * When the plcp error is exceeding the thresholds, reset the radio
+ * to improve the throughput.
+ */
+bool iwl_good_plcp_health(struct iwl_priv *priv,
+ struct iwl_rx_packet *pkt)
+{
+ bool rc = true;
+ int combined_plcp_delta;
+ unsigned int plcp_msec;
+ unsigned long plcp_received_jiffies;
+
+ /*
+ * check for plcp_err and trigger radio reset if it exceeds
+ * the plcp error threshold plcp_delta.
+ */
+ plcp_received_jiffies = jiffies;
+ plcp_msec = jiffies_to_msecs((long) plcp_received_jiffies -
+ (long) priv->plcp_jiffies);
+ priv->plcp_jiffies = plcp_received_jiffies;
+ /*
+ * check to make sure plcp_msec is not 0 to prevent division
+ * by zero.
+ */
+ if (plcp_msec) {
+ combined_plcp_delta =
+ (le32_to_cpu(pkt->u.stats.rx.ofdm.plcp_err) -
+ le32_to_cpu(priv->statistics.rx.ofdm.plcp_err)) +
+ (le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err) -
+ le32_to_cpu(priv->statistics.rx.ofdm_ht.plcp_err));
+
+ if ((combined_plcp_delta > 0) &&
+ ((combined_plcp_delta * 100) / plcp_msec) >
+ priv->cfg->plcp_delta_threshold) {
+ /*
+ * if plcp_err exceed the threshold,
+ * the following data is printed in csv format:
+ * Text: plcp_err exceeded %d,
+ * Received ofdm.plcp_err,
+ * Current ofdm.plcp_err,
+ * Received ofdm_ht.plcp_err,
+ * Current ofdm_ht.plcp_err,
+ * combined_plcp_delta,
+ * plcp_msec
+ */
+ IWL_DEBUG_RADIO(priv, "plcp_err exceeded %u, "
+ "%u, %u, %u, %u, %d, %u mSecs\n",
+ priv->cfg->plcp_delta_threshold,
+ le32_to_cpu(pkt->u.stats.rx.ofdm.plcp_err),
+ le32_to_cpu(priv->statistics.rx.ofdm.plcp_err),
+ le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err),
+ le32_to_cpu(
+ priv->statistics.rx.ofdm_ht.plcp_err),
+ combined_plcp_delta, plcp_msec);
+ rc = false;
+ }
+ }
+ return rc;
+}
+EXPORT_SYMBOL(iwl_good_plcp_health);
+
+void iwl_recover_from_statistics(struct iwl_priv *priv,
+ struct iwl_rx_packet *pkt)
+{
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return;
+ if (iwl_is_associated(priv)) {
+ if (priv->cfg->ops->lib->check_ack_health) {
+ if (!priv->cfg->ops->lib->check_ack_health(
+ priv, pkt)) {
+ /*
+ * low ack count detected
+ * restart Firmware
+ */
+ IWL_ERR(priv, "low ack count detected, "
+ "restart firmware\n");
+ if (!iwl_force_reset(priv, IWL_FW_RESET))
+ return;
+ }
+ }
+ if (priv->cfg->ops->lib->check_plcp_health) {
+ if (!priv->cfg->ops->lib->check_plcp_health(
+ priv, pkt)) {
+ /*
+ * high plcp error detected
+ * reset Radio
+ */
+ iwl_force_reset(priv, IWL_RF_RESET);
+ }
+ }
+ }
+}
+EXPORT_SYMBOL(iwl_recover_from_statistics);
+
void iwl_rx_statistics(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
int change;
struct iwl_rx_packet *pkt = rxb_addr(rxb);
+
IWL_DEBUG_RX(priv, "Statistics notification received (%d vs %d).\n",
(int)sizeof(priv->statistics),
le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
#ifdef CONFIG_IWLWIFI_DEBUG
iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
#endif
+ iwl_recover_from_statistics(priv, pkt);
+
memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
set_bit(STATUS_STATISTICS, &priv->status);
}
EXPORT_SYMBOL(iwl_rx_statistics);
-#define PERFECT_RSSI (-20) /* dBm */
-#define WORST_RSSI (-95) /* dBm */
-#define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
-
-/* Calculate an indication of rx signal quality (a percentage, not dBm!).
- * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
- * about formulas used below. */
-static int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
-{
- int sig_qual;
- int degradation = PERFECT_RSSI - rssi_dbm;
-
- /* If we get a noise measurement, use signal-to-noise ratio (SNR)
- * as indicator; formula is (signal dbm - noise dbm).
- * SNR at or above 40 is a great signal (100%).
- * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
- * Weakest usable signal is usually 10 - 15 dB SNR. */
- if (noise_dbm) {
- if (rssi_dbm - noise_dbm >= 40)
- return 100;
- else if (rssi_dbm < noise_dbm)
- return 0;
- sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
-
- /* Else use just the signal level.
- * This formula is a least squares fit of data points collected and
- * compared with a reference system that had a percentage (%) display
- * for signal quality. */
- } else
- sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
- (15 * RSSI_RANGE + 62 * degradation)) /
- (RSSI_RANGE * RSSI_RANGE);
-
- if (sig_qual > 100)
- sig_qual = 100;
- else if (sig_qual < 1)
- sig_qual = 0;
-
- return sig_qual;
-}
-
-/* Calc max signal level (dBm) among 3 possible receivers */
-static inline int iwl_calc_rssi(struct iwl_priv *priv,
- struct iwl_rx_phy_res *rx_resp)
+void iwl_reply_statistics(struct iwl_priv *priv,
+ struct iwl_rx_mem_buffer *rxb)
{
- return priv->cfg->ops->utils->calc_rssi(priv, rx_resp);
-}
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
#ifdef CONFIG_IWLWIFI_DEBUG
-/**
- * iwl_dbg_report_frame - dump frame to syslog during debug sessions
- *
- * You may hack this function to show different aspects of received frames,
- * including selective frame dumps.
- * group100 parameter selects whether to show 1 out of 100 good data frames.
- * All beacon and probe response frames are printed.
- */
-static void iwl_dbg_report_frame(struct iwl_priv *priv,
- struct iwl_rx_phy_res *phy_res, u16 length,
- struct ieee80211_hdr *header, int group100)
-{
- u32 to_us;
- u32 print_summary = 0;
- u32 print_dump = 0; /* set to 1 to dump all frames' contents */
- u32 hundred = 0;
- u32 dataframe = 0;
- __le16 fc;
- u16 seq_ctl;
- u16 channel;
- u16 phy_flags;
- u32 rate_n_flags;
- u32 tsf_low;
- int rssi;
-
- if (likely(!(iwl_get_debug_level(priv) & IWL_DL_RX)))
- return;
-
- /* MAC header */
- fc = header->frame_control;
- seq_ctl = le16_to_cpu(header->seq_ctrl);
-
- /* metadata */
- channel = le16_to_cpu(phy_res->channel);
- phy_flags = le16_to_cpu(phy_res->phy_flags);
- rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
-
- /* signal statistics */
- rssi = iwl_calc_rssi(priv, phy_res);
- tsf_low = le64_to_cpu(phy_res->timestamp) & 0x0ffffffff;
-
- to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
-
- /* if data frame is to us and all is good,
- * (optionally) print summary for only 1 out of every 100 */
- if (to_us && (fc & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) ==
- cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
- dataframe = 1;
- if (!group100)
- print_summary = 1; /* print each frame */
- else if (priv->framecnt_to_us < 100) {
- priv->framecnt_to_us++;
- print_summary = 0;
- } else {
- priv->framecnt_to_us = 0;
- print_summary = 1;
- hundred = 1;
- }
- } else {
- /* print summary for all other frames */
- print_summary = 1;
- }
-
- if (print_summary) {
- char *title;
- int rate_idx;
- u32 bitrate;
-
- if (hundred)
- title = "100Frames";
- else if (ieee80211_has_retry(fc))
- title = "Retry";
- else if (ieee80211_is_assoc_resp(fc))
- title = "AscRsp";
- else if (ieee80211_is_reassoc_resp(fc))
- title = "RasRsp";
- else if (ieee80211_is_probe_resp(fc)) {
- title = "PrbRsp";
- print_dump = 1; /* dump frame contents */
- } else if (ieee80211_is_beacon(fc)) {
- title = "Beacon";
- print_dump = 1; /* dump frame contents */
- } else if (ieee80211_is_atim(fc))
- title = "ATIM";
- else if (ieee80211_is_auth(fc))
- title = "Auth";
- else if (ieee80211_is_deauth(fc))
- title = "DeAuth";
- else if (ieee80211_is_disassoc(fc))
- title = "DisAssoc";
- else
- title = "Frame";
-
- rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags);
- if (unlikely((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT))) {
- bitrate = 0;
- WARN_ON_ONCE(1);
- } else {
- bitrate = iwl_rates[rate_idx].ieee / 2;
- }
-
- /* print frame summary.
- * MAC addresses show just the last byte (for brevity),
- * but you can hack it to show more, if you'd like to. */
- if (dataframe)
- IWL_DEBUG_RX(priv, "%s: mhd=0x%04x, dst=0x%02x, "
- "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
- title, le16_to_cpu(fc), header->addr1[5],
- length, rssi, channel, bitrate);
- else {
- /* src/dst addresses assume managed mode */
- IWL_DEBUG_RX(priv, "%s: 0x%04x, dst=0x%02x, src=0x%02x, "
- "len=%u, rssi=%d, tim=%lu usec, "
- "phy=0x%02x, chnl=%d\n",
- title, le16_to_cpu(fc), header->addr1[5],
- header->addr3[5], length, rssi,
- tsf_low - priv->scan_start_tsf,
- phy_flags, channel);
- }
+ memset(&priv->accum_statistics, 0,
+ sizeof(struct iwl_notif_statistics));
+ memset(&priv->delta_statistics, 0,
+ sizeof(struct iwl_notif_statistics));
+ memset(&priv->max_delta, 0,
+ sizeof(struct iwl_notif_statistics));
+#endif
+ IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
}
- if (print_dump)
- iwl_print_hex_dump(priv, IWL_DL_RX, header, length);
+ iwl_rx_statistics(priv, rxb);
}
-#endif
+EXPORT_SYMBOL(iwl_reply_statistics);
/*
* returns non-zero if packet should be dropped
return 0;
}
EXPORT_SYMBOL(iwl_set_decrypted_flag);
-
-static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
-{
- u32 decrypt_out = 0;
-
- if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
- RX_RES_STATUS_STATION_FOUND)
- decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
- RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
-
- decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
-
- /* packet was not encrypted */
- if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
- RX_RES_STATUS_SEC_TYPE_NONE)
- return decrypt_out;
-
- /* packet was encrypted with unknown alg */
- if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
- RX_RES_STATUS_SEC_TYPE_ERR)
- return decrypt_out;
-
- /* decryption was not done in HW */
- if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
- RX_MPDU_RES_STATUS_DEC_DONE_MSK)
- return decrypt_out;
-
- switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
-
- case RX_RES_STATUS_SEC_TYPE_CCMP:
- /* alg is CCM: check MIC only */
- if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
- /* Bad MIC */
- decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
- else
- decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
-
- break;
-
- case RX_RES_STATUS_SEC_TYPE_TKIP:
- if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
- /* Bad TTAK */
- decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
- break;
- }
- /* fall through if TTAK OK */
- default:
- if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
- decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
- else
- decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
- break;
- };
-
- IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
- decrypt_in, decrypt_out);
-
- return decrypt_out;
-}
-
-static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
- struct ieee80211_hdr *hdr,
- u16 len,
- u32 ampdu_status,
- struct iwl_rx_mem_buffer *rxb,
- struct ieee80211_rx_status *stats)
-{
- struct sk_buff *skb;
- int ret = 0;
- __le16 fc = hdr->frame_control;
-
- /* We only process data packets if the interface is open */
- if (unlikely(!priv->is_open)) {
- IWL_DEBUG_DROP_LIMIT(priv,
- "Dropping packet while interface is not open.\n");
- return;
- }
-
- /* In case of HW accelerated crypto and bad decryption, drop */
- if (!priv->cfg->mod_params->sw_crypto &&
- iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats))
- return;
-
- skb = alloc_skb(IWL_LINK_HDR_MAX * 2, GFP_ATOMIC);
- if (!skb) {
- IWL_ERR(priv, "alloc_skb failed\n");
- return;
- }
-
- skb_reserve(skb, IWL_LINK_HDR_MAX);
- skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
-
- /* mac80211 currently doesn't support paged SKB. Convert it to
- * linear SKB for management frame and data frame requires
- * software decryption or software defragementation. */
- if (ieee80211_is_mgmt(fc) ||
- ieee80211_has_protected(fc) ||
- ieee80211_has_morefrags(fc) ||
- le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)
- ret = skb_linearize(skb);
- else
- ret = __pskb_pull_tail(skb, min_t(u16, IWL_LINK_HDR_MAX, len)) ?
- 0 : -ENOMEM;
-
- if (ret) {
- kfree_skb(skb);
- goto out;
- }
-
- /*
- * XXX: We cannot touch the page and its virtual memory (hdr) after
- * here. It might have already been freed by the above skb change.
- */
-
- iwl_update_stats(priv, false, fc, len);
- memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
-
- ieee80211_rx(priv->hw, skb);
- out:
- priv->alloc_rxb_page--;
- rxb->page = NULL;
-}
-
-/* This is necessary only for a number of statistics, see the caller. */
-static int iwl_is_network_packet(struct iwl_priv *priv,
- struct ieee80211_hdr *header)
-{
- /* Filter incoming packets to determine if they are targeted toward
- * this network, discarding packets coming from ourselves */
- switch (priv->iw_mode) {
- case NL80211_IFTYPE_ADHOC: /* Header: Dest. | Source | BSSID */
- /* packets to our IBSS update information */
- return !compare_ether_addr(header->addr3, priv->bssid);
- case NL80211_IFTYPE_STATION: /* Header: Dest. | AP{BSSID} | Source */
- /* packets to our IBSS update information */
- return !compare_ether_addr(header->addr2, priv->bssid);
- default:
- return 1;
- }
-}
-
-/* Called for REPLY_RX (legacy ABG frames), or
- * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
-void iwl_rx_reply_rx(struct iwl_priv *priv,
- struct iwl_rx_mem_buffer *rxb)
-{
- struct ieee80211_hdr *header;
- struct ieee80211_rx_status rx_status;
- struct iwl_rx_packet *pkt = rxb_addr(rxb);
- struct iwl_rx_phy_res *phy_res;
- __le32 rx_pkt_status;
- struct iwl4965_rx_mpdu_res_start *amsdu;
- u32 len;
- u32 ampdu_status;
- u16 fc;
- u32 rate_n_flags;
-
- /**
- * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
- * REPLY_RX: physical layer info is in this buffer
- * REPLY_RX_MPDU_CMD: physical layer info was sent in separate
- * command and cached in priv->last_phy_res
- *
- * Here we set up local variables depending on which command is
- * received.
- */
- if (pkt->hdr.cmd == REPLY_RX) {
- phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
- header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
- + phy_res->cfg_phy_cnt);
-
- len = le16_to_cpu(phy_res->byte_count);
- rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
- phy_res->cfg_phy_cnt + len);
- ampdu_status = le32_to_cpu(rx_pkt_status);
- } else {
- if (!priv->last_phy_res[0]) {
- IWL_ERR(priv, "MPDU frame without cached PHY data\n");
- return;
- }
- phy_res = (struct iwl_rx_phy_res *)&priv->last_phy_res[1];
- amsdu = (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
- header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
- len = le16_to_cpu(amsdu->byte_count);
- rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
- ampdu_status = iwl_translate_rx_status(priv,
- le32_to_cpu(rx_pkt_status));
- }
-
- if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
- IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
- phy_res->cfg_phy_cnt);
- return;
- }
-
- if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
- !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
- IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
- le32_to_cpu(rx_pkt_status));
- return;
- }
-
- /* This will be used in several places later */
- rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
-
- /* rx_status carries information about the packet to mac80211 */
- rx_status.mactime = le64_to_cpu(phy_res->timestamp);
- rx_status.freq =
- ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel));
- rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
- IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
- rx_status.rate_idx =
- iwl_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
- rx_status.flag = 0;
-
- /* TSF isn't reliable. In order to allow smooth user experience,
- * this W/A doesn't propagate it to the mac80211 */
- /*rx_status.flag |= RX_FLAG_TSFT;*/
-
- priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
-
- /* Find max signal strength (dBm) among 3 antenna/receiver chains */
- rx_status.signal = iwl_calc_rssi(priv, phy_res);
-
- /* Meaningful noise values are available only from beacon statistics,
- * which are gathered only when associated, and indicate noise
- * only for the associated network channel ...
- * Ignore these noise values while scanning (other channels) */
- if (iwl_is_associated(priv) &&
- !test_bit(STATUS_SCANNING, &priv->status)) {
- rx_status.noise = priv->last_rx_noise;
- rx_status.qual = iwl_calc_sig_qual(rx_status.signal,
- rx_status.noise);
- } else {
- rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
- rx_status.qual = iwl_calc_sig_qual(rx_status.signal, 0);
- }
-
- /* Reset beacon noise level if not associated. */
- if (!iwl_is_associated(priv))
- priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
-
-#ifdef CONFIG_IWLWIFI_DEBUG
- /* Set "1" to report good data frames in groups of 100 */
- if (unlikely(iwl_get_debug_level(priv) & IWL_DL_RX))
- iwl_dbg_report_frame(priv, phy_res, len, header, 1);
-#endif
- iwl_dbg_log_rx_data_frame(priv, len, header);
- IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, noise %d, qual %d, TSF %llu\n",
- rx_status.signal, rx_status.noise, rx_status.qual,
- (unsigned long long)rx_status.mactime);
-
- /*
- * "antenna number"
- *
- * It seems that the antenna field in the phy flags value
- * is actually a bit field. This is undefined by radiotap,
- * it wants an actual antenna number but I always get "7"
- * for most legacy frames I receive indicating that the
- * same frame was received on all three RX chains.
- *
- * I think this field should be removed in favor of a
- * new 802.11n radiotap field "RX chains" that is defined
- * as a bitmask.
- */
- rx_status.antenna =
- (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
- >> RX_RES_PHY_FLAGS_ANTENNA_POS;
-
- /* set the preamble flag if appropriate */
- if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
- rx_status.flag |= RX_FLAG_SHORTPRE;
-
- /* Set up the HT phy flags */
- if (rate_n_flags & RATE_MCS_HT_MSK)
- rx_status.flag |= RX_FLAG_HT;
- if (rate_n_flags & RATE_MCS_HT40_MSK)
- rx_status.flag |= RX_FLAG_40MHZ;
- if (rate_n_flags & RATE_MCS_SGI_MSK)
- rx_status.flag |= RX_FLAG_SHORT_GI;
-
- if (iwl_is_network_packet(priv, header)) {
- priv->last_rx_rssi = rx_status.signal;
- priv->last_beacon_time = priv->ucode_beacon_time;
- priv->last_tsf = le64_to_cpu(phy_res->timestamp);
- }
-
- fc = le16_to_cpu(header->frame_control);
- switch (fc & IEEE80211_FCTL_FTYPE) {
- case IEEE80211_FTYPE_MGMT:
- case IEEE80211_FTYPE_DATA:
- if (priv->iw_mode == NL80211_IFTYPE_AP)
- iwl_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
- header->addr2);
- /* fall through */
- default:
- iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status,
- rxb, &rx_status);
- break;
-
- }
-}
-EXPORT_SYMBOL(iwl_rx_reply_rx);
-
-/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
- * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
-void iwl_rx_reply_rx_phy(struct iwl_priv *priv,
- struct iwl_rx_mem_buffer *rxb)
-{
- struct iwl_rx_packet *pkt = rxb_addr(rxb);
- priv->last_phy_res[0] = 1;
- memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
- sizeof(struct iwl_rx_phy_res));
-}
-EXPORT_SYMBOL(iwl_rx_reply_rx_phy);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff