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net: lan966x: use FDMA library for adding DCB's in the tx path

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Use the fdma_dcb_add() function to add DCB's in the tx path. This gets
rid of the open-coding of nextptr and dataptr handling and leaves it to
the library.

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 10:06:36 +02:00 committed by Paolo Abeni
parent df2ddc1458
commit 29cc3a66a8
1 changed files with 30 additions and 32 deletions
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62
drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
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@ -33,6 +33,16 @@ static int lan966x_fdma_tx_dataptr_cb(struct fdma *fdma, int dcb, int db,
return 0;
}
static int lan966x_fdma_xdp_tx_dataptr_cb(struct fdma *fdma, int dcb, int db,
u64 *dataptr)
{
struct lan966x *lan966x = (struct lan966x *)fdma->priv;
*dataptr = lan966x->tx.dcbs_buf[dcb].dma_addr + XDP_PACKET_HEADROOM;
return 0;
}
static int lan966x_fdma_channel_active(struct lan966x *lan966x)
{
return lan_rd(lan966x, FDMA_CH_ACTIVE);
@ -600,25 +610,6 @@ static int lan966x_fdma_get_next_dcb(struct lan966x_tx *tx)
return -1;
}
static void lan966x_fdma_tx_setup_dcb(struct lan966x_tx *tx,
int next_to_use, int len,
dma_addr_t dma_addr)
{
struct fdma_dcb *next_dcb;
struct fdma_db *next_db;
next_dcb = &tx->fdma.dcbs[next_to_use];
next_dcb->nextptr = FDMA_DCB_INVALID_DATA;
next_db = &next_dcb->db[0];
next_db->dataptr = dma_addr;
next_db->status = FDMA_DCB_STATUS_SOF |
FDMA_DCB_STATUS_EOF |
FDMA_DCB_STATUS_INTR |
FDMA_DCB_STATUS_BLOCKO(0) |
FDMA_DCB_STATUS_BLOCKL(len);
}
static void lan966x_fdma_tx_start(struct lan966x_tx *tx, int next_to_use)
{
struct lan966x *lan966x = tx->lan966x;
@ -692,11 +683,6 @@ int lan966x_fdma_xmit_xdpf(struct lan966x_port *port, void *ptr, u32 len)
next_dcb_buf->data.xdpf = xdpf;
next_dcb_buf->len = xdpf->len + IFH_LEN_BYTES;
/* Setup next dcb */
lan966x_fdma_tx_setup_dcb(tx, next_to_use,
xdpf->len + IFH_LEN_BYTES,
dma_addr);
} else {
page = ptr;
@ -713,11 +699,6 @@ int lan966x_fdma_xmit_xdpf(struct lan966x_port *port, void *ptr, u32 len)
next_dcb_buf->data.page = page;
next_dcb_buf->len = len + IFH_LEN_BYTES;
/* Setup next dcb */
lan966x_fdma_tx_setup_dcb(tx, next_to_use,
len + IFH_LEN_BYTES,
dma_addr + XDP_PACKET_HEADROOM);
}
/* Fill up the buffer */
@ -728,6 +709,17 @@ int lan966x_fdma_xmit_xdpf(struct lan966x_port *port, void *ptr, u32 len)
next_dcb_buf->ptp = false;
next_dcb_buf->dev = port->dev;
__fdma_dcb_add(&tx->fdma,
next_to_use,
0,
FDMA_DCB_STATUS_INTR |
FDMA_DCB_STATUS_SOF |
FDMA_DCB_STATUS_EOF |
FDMA_DCB_STATUS_BLOCKO(0) |
FDMA_DCB_STATUS_BLOCKL(next_dcb_buf->len),
&fdma_nextptr_cb,
&lan966x_fdma_xdp_tx_dataptr_cb);
/* Start the transmission */
lan966x_fdma_tx_start(tx, next_to_use);
@ -787,9 +779,6 @@ int lan966x_fdma_xmit(struct sk_buff *skb, __be32 *ifh, struct net_device *dev)
goto release;
}
/* Setup next dcb */
lan966x_fdma_tx_setup_dcb(tx, next_to_use, skb->len, dma_addr);
/* Fill up the buffer */
next_dcb_buf = &tx->dcbs_buf[next_to_use];
next_dcb_buf->use_skb = true;
@ -801,6 +790,15 @@ int lan966x_fdma_xmit(struct sk_buff *skb, __be32 *ifh, struct net_device *dev)
next_dcb_buf->ptp = false;
next_dcb_buf->dev = dev;
fdma_dcb_add(&tx->fdma,
next_to_use,
0,
FDMA_DCB_STATUS_INTR |
FDMA_DCB_STATUS_SOF |
FDMA_DCB_STATUS_EOF |
FDMA_DCB_STATUS_BLOCKO(0) |
FDMA_DCB_STATUS_BLOCKL(skb->len));
if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP)
next_dcb_buf->ptp = true;