iwlagn: move rx transport functions to iwl-trans-rx-pcie.c

Also create a new file: iwl-trans-int-pcie.h which will include
the non static functions that are shared among the current pcie transport layer.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

1 files changed, 0 insertions, 136 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index bd63b78..05fd75f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -41,142 +41,6 @@
 #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);
-}
 
 /******************************************************************************
  *