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ixgbe: cleanup IXGBE_DESC_UNUSED

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This patch just replaces the IXGBE_DESC_UNUSED macro with a like named
inline function ixgbevf_desc_unused. The inline function makes the logic
a bit more readable.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Don Skidmore 2013-10-23 02:17:52 +00:00 committed by Jeff Kirsher
parent fb44519de9
commit f880d07bc5
2 changed files with 12 additions and 8 deletions
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10
drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
View File

@ -286,9 +286,13 @@ static inline bool ixgbevf_qv_disable(struct ixgbevf_q_vector *q_vector)
((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
#define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
#define IXGBE_DESC_UNUSED(R) \
((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
(R)->next_to_clean - (R)->next_to_use - 1)
static inline u16 ixgbevf_desc_unused(struct ixgbevf_ring *ring)
{
u16 ntc = ring->next_to_clean;
u16 ntu = ring->next_to_use;
return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
}
#define IXGBEVF_RX_DESC(R, i) \
(&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))

10
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
View File

@ -251,7 +251,7 @@ static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
(IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
(ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
/* Make sure that anybody stopping the queue after this
* sees the new next_to_clean.
*/
@ -529,7 +529,7 @@ next_desc:
}
rx_ring->next_to_clean = i;
cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
cleaned_count = ixgbevf_desc_unused(rx_ring);
if (cleaned_count)
ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
@ -1380,7 +1380,7 @@ static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
for (i = 0; i < adapter->num_rx_queues; i++) {
struct ixgbevf_ring *ring = &adapter->rx_ring[i];
ixgbevf_alloc_rx_buffers(adapter, ring,
IXGBE_DESC_UNUSED(ring));
ixgbevf_desc_unused(ring));
}
}
@ -3102,7 +3102,7 @@ static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
/* We need to check again in a case another CPU has just
* made room available. */
if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
if (likely(ixgbevf_desc_unused(tx_ring) < size))
return -EBUSY;
/* A reprieve! - use start_queue because it doesn't call schedule */
@ -3113,7 +3113,7 @@ static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
{
if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
if (likely(ixgbevf_desc_unused(tx_ring) >= size))
return 0;
return __ixgbevf_maybe_stop_tx(tx_ring, size);
}