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ionic: use fewer firmware doorbells on rx fill 

We really don't need to hit the Rx queue doorbell so many times,
we can wait to the end and cause a little less thrash.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2020-07-31 13:15:34 -07:00 committed by David S. Miller
parent 622e32b7d4
commit 155f15ad67
1 changed files with 5 additions and 10 deletions
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15
drivers/net/ethernet/pensando/ionic/ionic_txrx.c
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@ -331,9 +331,6 @@ static void ionic_rx_page_free(struct ionic_queue *q, struct page *page,
__free_page(page);
}
#define IONIC_RX_RING_DOORBELL_STRIDE ((1 << 5) - 1)
#define IONIC_RX_RING_HEAD_BUF_SZ 2048
void ionic_rx_fill(struct ionic_queue *q)
{
struct net_device *netdev = q->lif->netdev;
@ -345,7 +342,6 @@ void ionic_rx_fill(struct ionic_queue *q)
unsigned int remain_len;
unsigned int seg_len;
unsigned int nfrags;
bool ring_doorbell;
unsigned int i, j;
unsigned int len;
@ -360,9 +356,7 @@ void ionic_rx_fill(struct ionic_queue *q)
page_info = &desc_info->pages[0];
if (page_info->page) { /* recycle the buffer */
ring_doorbell = ((q->head->index + 1) &
IONIC_RX_RING_DOORBELL_STRIDE) == 0;
ionic_rxq_post(q, ring_doorbell, ionic_rx_clean, NULL);
ionic_rxq_post(q, false, ionic_rx_clean, NULL);
continue;
}
@ -401,10 +395,11 @@ void ionic_rx_fill(struct ionic_queue *q)
page_info++;
}
ring_doorbell = ((q->head->index + 1) &
IONIC_RX_RING_DOORBELL_STRIDE) == 0;
ionic_rxq_post(q, ring_doorbell, ionic_rx_clean, NULL);
ionic_rxq_post(q, false, ionic_rx_clean, NULL);
}
ionic_dbell_ring(q->lif->kern_dbpage, q->hw_type,
q->dbval | q->head->index);
}
static void ionic_rx_fill_cb(void *arg)