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liquidio: fix inaccurate count of napi-processed rx packets reported to Octeon

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lio_enable_irq (called by napi poll) is reporting to Octeon an inaccurate
count of processed rx packets causing Octeon to eventually stop forwarding
packets to the host.  Fix it by using this formula for an accurate count:

    processed rx packets = droq->pkt_count - droq->pkts_pending

Also increase SOFT_COMMAND_BUFFER_SIZE to match what the firmware expects.

Signed-off-by: Prasad Kanneganti <prasad.kanneganti@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Prasad Kanneganti 2017-05-25 10:54:29 -07:00 committed by David S. Miller
parent d5c7d9b934
commit a55667e6f2
2 changed files with 5 additions and 3 deletions
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6
drivers/net/ethernet/cavium/liquidio/octeon_device.c
View File

@ -1429,13 +1429,15 @@ int lio_get_device_id(void *dev)
void lio_enable_irq(struct octeon_droq *droq, struct octeon_instr_queue *iq)
{
u64 instr_cnt;
u32 pkts_pend;
struct octeon_device *oct = NULL;
/* the whole thing needs to be atomic, ideally */
if (droq) {
pkts_pend = (u32)atomic_read(&droq->pkts_pending);
spin_lock_bh(&droq->lock);
writel(droq->pkt_count, droq->pkts_sent_reg);
droq->pkt_count = 0;
writel(droq->pkt_count - pkts_pend, droq->pkts_sent_reg);
droq->pkt_count = pkts_pend;
/* this write needs to be flushed before we release the lock */
mmiowb();
spin_unlock_bh(&droq->lock);

2
drivers/net/ethernet/cavium/liquidio/octeon_iq.h
View File

@ -251,7 +251,7 @@ union octeon_instr_64B {
/** The size of each buffer in soft command buffer pool
*/
#define SOFT_COMMAND_BUFFER_SIZE 1536
#define SOFT_COMMAND_BUFFER_SIZE 2048
struct octeon_soft_command {
/** Soft command buffer info. */