#include "iwl-agn-calib.h"
#include "iwl-agn.h"
-/******************************************************************************
- *
- * RX path functions
- *
- ******************************************************************************/
-
-/*
- * Rx theory of operation
- *
- * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
- * each of which point to Receive Buffers to be filled by the NIC. These get
- * used not only for Rx frames, but for any command response or notification
- * from the NIC. The driver and NIC manage the Rx buffers by means
- * of indexes into the circular buffer.
- *
- * Rx Queue Indexes
- * The host/firmware share two index registers for managing the Rx buffers.
- *
- * The READ index maps to the first position that the firmware may be writing
- * to -- the driver can read up to (but not including) this position and get
- * good data.
- * The READ index is managed by the firmware once the card is enabled.
- *
- * The WRITE index maps to the last position the driver has read from -- the
- * position preceding WRITE is the last slot the firmware can place a packet.
- *
- * The queue is empty (no good data) if WRITE = READ - 1, and is full if
- * WRITE = READ.
- *
- * During initialization, the host sets up the READ queue position to the first
- * INDEX position, and WRITE to the last (READ - 1 wrapped)
- *
- * When the firmware places a packet in a buffer, it will advance the READ index
- * and fire the RX interrupt. The driver can then query the READ index and
- * process as many packets as possible, moving the WRITE index forward as it
- * resets the Rx queue buffers with new memory.
- *
- * The management in the driver is as follows:
- * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
- * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
- * to replenish the iwl->rxq->rx_free.
- * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
- * iwl->rxq is replenished and the READ INDEX is updated (updating the
- * 'processed' and 'read' driver indexes as well)
- * + A received packet is processed and handed to the kernel network stack,
- * detached from the iwl->rxq. The driver 'processed' index is updated.
- * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
- * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
- * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
- * were enough free buffers and RX_STALLED is set it is cleared.
- *
- *
- * Driver sequence:
- *
- * iwl_rx_queue_alloc() Allocates rx_free
- * iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
- * iwl_rx_queue_restock
- * iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
- * queue, updates firmware pointers, and updates
- * the WRITE index. If insufficient rx_free buffers
- * are available, schedules iwl_rx_replenish
- *
- * -- enable interrupts --
- * ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
- * READ INDEX, detaching the SKB from the pool.
- * Moves the packet buffer from queue to rx_used.
- * Calls iwl_rx_queue_restock to refill any empty
- * slots.
- * ...
- *
- */
-
-/**
- * iwl_rx_queue_space - Return number of free slots available in queue.
- */
-int iwl_rx_queue_space(const struct iwl_rx_queue *q)
-{
- int s = q->read - q->write;
- if (s <= 0)
- s += RX_QUEUE_SIZE;
- /* keep some buffer to not confuse full and empty queue */
- s -= 2;
- if (s < 0)
- s = 0;
- return s;
-}
-
-/**
- * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
- */
-void iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
-{
- unsigned long flags;
- u32 reg;
-
- spin_lock_irqsave(&q->lock, flags);
-
- if (q->need_update == 0)
- goto exit_unlock;
-
- if (priv->cfg->base_params->shadow_reg_enable) {
- /* shadow register enabled */
- /* Device expects a multiple of 8 */
- q->write_actual = (q->write & ~0x7);
- iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write_actual);
- } else {
- /* If power-saving is in use, make sure device is awake */
- if (test_bit(STATUS_POWER_PMI, &priv->status)) {
- 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;
- }
-
- q->write_actual = (q->write & ~0x7);
- iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
- q->write_actual);
-
- /* Else device is assumed to be awake */
- } else {
- /* Device expects a multiple of 8 */
- q->write_actual = (q->write & ~0x7);
- iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
- q->write_actual);
- }
- }
- q->need_update = 0;
-
- exit_unlock:
- spin_unlock_irqrestore(&q->lock, flags);
-}
/******************************************************************************
*
int actual_delta, expected_delta, ba_timeout_delta;
struct statistics_tx *old;
- if (priv->_agn.agg_tids_count)
+ if (priv->agg_tids_count)
return true;
old = &priv->statistics.tx;
iwl_rx_calc_noise(priv);
queue_work(priv->workqueue, &priv->run_time_calib_work);
}
- if (priv->cfg->ops->lib->temperature && change)
- priv->cfg->ops->lib->temperature(priv);
+ if (priv->cfg->lib->temperature && change)
+ priv->cfg->lib->temperature(priv);
}
static void iwl_rx_reply_statistics(struct iwl_priv *priv,
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
- priv->_agn.last_phy_res_valid = true;
- memcpy(&priv->_agn.last_phy_res, pkt->u.raw,
+ priv->last_phy_res_valid = true;
+ memcpy(&priv->last_phy_res, pkt->u.raw,
sizeof(struct iwl_rx_phy_res));
}
phy_res->cfg_phy_cnt + len);
ampdu_status = le32_to_cpu(rx_pkt_status);
} else {
- if (!priv->_agn.last_phy_res_valid) {
+ if (!priv->last_phy_res_valid) {
IWL_ERR(priv, "MPDU frame without cached PHY data\n");
return;
}
- phy_res = &priv->_agn.last_phy_res;
+ phy_res = &priv->last_phy_res;
amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw;
header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
len = le16_to_cpu(amsdu->byte_count);
/* block ack */
handlers[REPLY_COMPRESSED_BA] = iwlagn_rx_reply_compressed_ba;
- /* Set up hardware specific Rx handlers */
- priv->cfg->ops->lib->rx_handler_setup(priv);
+ /* init calibration handlers */
+ priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
+ iwlagn_rx_calib_result;
+ priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
+
+ /* set up notification wait support */
+ spin_lock_init(&priv->notif_wait_lock);
+ INIT_LIST_HEAD(&priv->notif_waits);
+ init_waitqueue_head(&priv->notif_waitq);
+
+ /* Set up BT Rx handlers */
+ if (priv->cfg->lib->bt_rx_handler_setup)
+ priv->cfg->lib->bt_rx_handler_setup(priv);
+
+}
+
+void iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
+{
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+
+ /*
+ * Do the notification wait before RX handlers so
+ * even if the RX handler consumes the RXB we have
+ * access to it in the notification wait entry.
+ */
+ if (!list_empty(&priv->notif_waits)) {
+ struct iwl_notification_wait *w;
+
+ spin_lock(&priv->notif_wait_lock);
+ list_for_each_entry(w, &priv->notif_waits, list) {
+ if (w->cmd != pkt->hdr.cmd)
+ continue;
+ IWL_DEBUG_RX(priv,
+ "Notif: %s, 0x%02x - wake the callers up\n",
+ get_cmd_string(pkt->hdr.cmd),
+ pkt->hdr.cmd);
+ w->triggered = true;
+ if (w->fn)
+ w->fn(priv, pkt, w->fn_data);
+ }
+ spin_unlock(&priv->notif_wait_lock);
+
+ wake_up_all(&priv->notif_waitq);
+ }
+
+ if (priv->pre_rx_handler)
+ priv->pre_rx_handler(priv, rxb);
+
+ /* Based on type of command response or notification,
+ * handle those that need handling via function in
+ * rx_handlers table. See iwl_setup_rx_handlers() */
+ if (priv->rx_handlers[pkt->hdr.cmd]) {
+ priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
+ priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
+ } else {
+ /* No handling needed */
+ IWL_DEBUG_RX(priv,
+ "No handler needed for %s, 0x%02x\n",
+ get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
+ }
}
git.openpandora.org / pandora-kernel.git / blobdiff