igb: remove IGB_DESC_UNUSED since it is better handled by a function call
This patch removes IGB_DESC_UNUSED and replaces it with a function call instead in order to cleanup some of the ugliness introduced by the macro. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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c493ea45a4
2 changed files with 18 additions and 11 deletions
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@ -182,10 +182,6 @@ struct igb_ring {
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char name[IFNAMSIZ + 5];
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};
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#define IGB_DESC_UNUSED(R) \
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((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
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(R)->next_to_clean - (R)->next_to_use - 1)
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#define E1000_RX_DESC_ADV(R, i) \
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(&(((union e1000_adv_rx_desc *)((R).desc))[i]))
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#define E1000_TX_DESC_ADV(R, i) \
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@ -277,6 +277,17 @@ static char *igb_get_time_str(struct igb_adapter *adapter,
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}
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#endif
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/**
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* igb_desc_unused - calculate if we have unused descriptors
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**/
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static int igb_desc_unused(struct igb_ring *ring)
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{
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if (ring->next_to_clean > ring->next_to_use)
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return ring->next_to_clean - ring->next_to_use - 1;
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return ring->count + ring->next_to_clean - ring->next_to_use - 1;
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}
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/**
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* igb_init_module - Driver Registration Routine
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*
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@ -873,12 +884,12 @@ static void igb_configure(struct igb_adapter *adapter)
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igb_rx_fifo_flush_82575(&adapter->hw);
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/* call IGB_DESC_UNUSED which always leaves
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/* call igb_desc_unused which always leaves
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* at least 1 descriptor unused to make sure
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* next_to_use != next_to_clean */
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for (i = 0; i < adapter->num_rx_queues; i++) {
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struct igb_ring *ring = &adapter->rx_ring[i];
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igb_alloc_rx_buffers_adv(ring, IGB_DESC_UNUSED(ring));
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igb_alloc_rx_buffers_adv(ring, igb_desc_unused(ring));
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}
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@ -2661,7 +2672,7 @@ link_up:
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igb_update_adaptive(&adapter->hw);
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if (!netif_carrier_ok(netdev)) {
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if (IGB_DESC_UNUSED(tx_ring) + 1 < tx_ring->count) {
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if (igb_desc_unused(tx_ring) + 1 < tx_ring->count) {
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/* We've lost link, so the controller stops DMA,
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* but we've got queued Tx work that's never going
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* to get done, so reset controller to flush Tx.
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@ -3199,7 +3210,7 @@ static int __igb_maybe_stop_tx(struct net_device *netdev,
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/* We need to check again in a case another CPU has just
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* made room available. */
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if (IGB_DESC_UNUSED(tx_ring) < size)
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if (igb_desc_unused(tx_ring) < size)
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return -EBUSY;
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/* A reprieve! */
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@ -3211,7 +3222,7 @@ static int __igb_maybe_stop_tx(struct net_device *netdev,
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static int igb_maybe_stop_tx(struct net_device *netdev,
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struct igb_ring *tx_ring, int size)
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{
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if (IGB_DESC_UNUSED(tx_ring) >= size)
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if (igb_desc_unused(tx_ring) >= size)
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return 0;
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return __igb_maybe_stop_tx(netdev, tx_ring, size);
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}
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@ -4310,7 +4321,7 @@ static bool igb_clean_tx_irq(struct igb_ring *tx_ring)
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if (unlikely(count &&
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netif_carrier_ok(netdev) &&
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IGB_DESC_UNUSED(tx_ring) >= IGB_TX_QUEUE_WAKE)) {
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igb_desc_unused(tx_ring) >= IGB_TX_QUEUE_WAKE)) {
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/* Make sure that anybody stopping the queue after this
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* sees the new next_to_clean.
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*/
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@ -4587,7 +4598,7 @@ next_desc:
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}
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rx_ring->next_to_clean = i;
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cleaned_count = IGB_DESC_UNUSED(rx_ring);
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cleaned_count = igb_desc_unused(rx_ring);
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if (cleaned_count)
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igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);
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