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can: kvaser_pciefd: Use TX FIFO size read from CAN controller

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Use the TX FIFO size read from CAN controller register, instead of using
hard coded value.

Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20230529134248.752036-15-extja@kvaser.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Jimmy Assarsson
2023-05-29 15:42:48 +02:00
committed by Marc Kleine-Budde
parent f4845741e4
commit 6fdcd64ec3
1 changed files with 3 additions and 12 deletions
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15
drivers/net/can/kvaser_pciefd.c
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@@ -658,8 +658,7 @@ static netdev_tx_t kvaser_pciefd_start_xmit(struct sk_buff *skb,
/* No room for a new message, stop the queue until at least one
* successful transmit
*/
if (count >= KVASER_PCIEFD_CAN_TX_MAX_COUNT ||
can->can.echo_skb[can->echo_idx])
if (count >= can->can.echo_skb_max || can->can.echo_skb[can->echo_idx])
netif_stop_queue(netdev);
spin_unlock_irqrestore(&can->echo_lock, irq_flags);
@@ -802,16 +801,9 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie)
tx_nr_packets_max =
FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_MAX_MASK,
ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG));
if (tx_nr_packets_max < KVASER_PCIEFD_CAN_TX_MAX_COUNT) {
dev_err(&pcie->pci->dev,
"Max Tx count is smaller than expected\n");
free_candev(netdev);
return -ENODEV;
}
can->can.clock.freq = pcie->freq;
can->can.echo_skb_max = KVASER_PCIEFD_CAN_TX_MAX_COUNT;
can->can.echo_skb_max = min(KVASER_PCIEFD_CAN_TX_MAX_COUNT, tx_nr_packets_max - 1);
can->echo_idx = 0;
spin_lock_init(&can->echo_lock);
spin_lock_init(&can->lock);
@@ -1311,8 +1303,7 @@ static int kvaser_pciefd_handle_ack_packet(struct kvaser_pciefd *pcie,
count = FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_CURRENT_MASK,
ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG));
if (count < KVASER_PCIEFD_CAN_TX_MAX_COUNT &&
netif_queue_stopped(can->can.dev))
if (count < can->can.echo_skb_max && netif_queue_stopped(can->can.dev))
netif_wake_queue(can->can.dev);
if (!one_shot_fail) {