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net: lan966x: ditch tx->last_in_use variable

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This variable is used in the tx path to determine the last used DCB. The
library has the variable last_dcb for the exact same purpose. Ditch the
last_in_use variable throughout.

Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Daniel Machon 2024-09-05 10:06:38 +02:00 committed by Paolo Abeni
parent 8cdd0bd022
commit c06fef96c7
2 changed files with 4 additions and 18 deletions
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20
drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
View File

@ -293,7 +293,6 @@ static void lan966x_fdma_tx_disable(struct lan966x_tx *tx)
lan966x, FDMA_CH_DB_DISCARD);
tx->activated = false;
tx->last_in_use = -1;
}
static void lan966x_fdma_tx_reload(struct lan966x_tx *tx)
@ -598,34 +597,24 @@ static int lan966x_fdma_get_next_dcb(struct lan966x_tx *tx)
for (i = 0; i < fdma->n_dcbs; ++i) {
dcb_buf = &tx->dcbs_buf[i];
if (!dcb_buf->used && i != tx->last_in_use)
if (!dcb_buf->used && &fdma->dcbs[i] != fdma->last_dcb)
return i;
}
return -1;
}
static void lan966x_fdma_tx_start(struct lan966x_tx *tx, int next_to_use)
static void lan966x_fdma_tx_start(struct lan966x_tx *tx)
{
struct lan966x *lan966x = tx->lan966x;
struct fdma *fdma = &tx->fdma;
struct fdma_dcb *dcb;
if (likely(lan966x->tx.activated)) {
/* Connect current dcb to the next db */
dcb = &fdma->dcbs[tx->last_in_use];
dcb->nextptr = fdma->dma + (next_to_use *
sizeof(struct fdma_dcb));
lan966x_fdma_tx_reload(tx);
} else {
/* Because it is first time, then just activate */
lan966x->tx.activated = true;
lan966x_fdma_tx_activate(tx);
}
/* Move to next dcb because this last in use */
tx->last_in_use = next_to_use;
}
int lan966x_fdma_xmit_xdpf(struct lan966x_port *port, void *ptr, u32 len)
@ -716,7 +705,7 @@ int lan966x_fdma_xmit_xdpf(struct lan966x_port *port, void *ptr, u32 len)
&lan966x_fdma_xdp_tx_dataptr_cb);
/* Start the transmission */
lan966x_fdma_tx_start(tx, next_to_use);
lan966x_fdma_tx_start(tx);
out:
spin_unlock(&lan966x->tx_lock);
@ -799,7 +788,7 @@ int lan966x_fdma_xmit(struct sk_buff *skb, __be32 *ifh, struct net_device *dev)
next_dcb_buf->ptp = true;
/* Start the transmission */
lan966x_fdma_tx_start(tx, next_to_use);
lan966x_fdma_tx_start(tx);
return NETDEV_TX_OK;
@ -985,7 +974,6 @@ int lan966x_fdma_init(struct lan966x *lan966x)
lan966x->tx.fdma.db_size = PAGE_SIZE << lan966x->rx.page_order;
lan966x->tx.fdma.ops.nextptr_cb = &fdma_nextptr_cb;
lan966x->tx.fdma.ops.dataptr_cb = &lan966x_fdma_tx_dataptr_cb;
lan966x->tx.last_in_use = -1;
err = lan966x_fdma_rx_alloc(&lan966x->rx);
if (err)

2
drivers/net/ethernet/microchip/lan966x/lan966x_main.h
View File

@ -232,8 +232,6 @@ struct lan966x_tx {
struct fdma fdma;
u16 last_in_use;
/* Array of dcbs that are given to the HW */
struct lan966x_tx_dcb_buf *dcbs_buf;