[PATCH net] net: mvpp2: fix pkt coalescing int-threshold configuration

From: stefanc
Date: Wed Dec 23 2020 - 13:39:13 EST


From: Stefan Chulski <stefanc@xxxxxxxxxxx>

The packet coalescing interrupt threshold has separated registers
for different aggregated/cpu (sw-thread). The required value should
be loaded for every thread but not only for 1 current cpu.

Fixes: 213f428f5056 ("net: mvpp2: add support for TX interrupts and RX queue distribution modes")
Signed-off-by: Stefan Chulski <stefanc@xxxxxxxxxxx>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 87068eb..3982956 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -2370,17 +2370,18 @@ static void mvpp2_rx_pkts_coal_set(struct mvpp2_port *port,
static void mvpp2_tx_pkts_coal_set(struct mvpp2_port *port,
struct mvpp2_tx_queue *txq)
{
- unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu());
+ unsigned int thread;
u32 val;

if (txq->done_pkts_coal > MVPP2_TXQ_THRESH_MASK)
txq->done_pkts_coal = MVPP2_TXQ_THRESH_MASK;

val = (txq->done_pkts_coal << MVPP2_TXQ_THRESH_OFFSET);
- mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id);
- mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_THRESH_REG, val);
-
- put_cpu();
+ /* PKT-coalescing registers are per-queue + per-thread */
+ for (thread = 0; thread < MVPP2_MAX_THREADS; thread++) {
+ mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id);
+ mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_THRESH_REG, val);
+ }
}

static u32 mvpp2_usec_to_cycles(u32 usec, unsigned long clk_hz)
--
1.9.1