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i40e: xsk: add TX multi-buffer support

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Set eop bit in TX desc command only for the last descriptor of the
packet and do not set for all preceding descriptors.

Signed-off-by: Tirthendu Sarkar <tirthendu.sarkar@intel.com>
Link: https://lore.kernel.org/r/20230719132421.584801-17-maciej.fijalkowski@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Tirthendu Sarkar 2023-07-19 15:24:13 +02:00 committed by Alexei Starovoitov
parent eeb2b53810
commit a92b96c4ae
2 changed files with 6 additions and 5 deletions
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1
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -13817,6 +13817,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
NETDEV_XDP_ACT_REDIRECT |
NETDEV_XDP_ACT_XSK_ZEROCOPY |
NETDEV_XDP_ACT_RX_SG;
netdev->xdp_zc_max_segs = I40E_MAX_BUFFER_TXD;
} else {
/* Relate the VSI_VMDQ name to the VSI_MAIN name. Note that we
* are still limited by IFNAMSIZ, but we're adding 'v%d\0' to

10
drivers/net/ethernet/intel/i40e/i40e_xsk.c
View File

@ -535,6 +535,7 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
static void i40e_xmit_pkt(struct i40e_ring *xdp_ring, struct xdp_desc *desc,
unsigned int *total_bytes)
{
u32 cmd = I40E_TX_DESC_CMD_ICRC | xsk_is_eop_desc(desc);
struct i40e_tx_desc *tx_desc;
dma_addr_t dma;
@ -543,8 +544,7 @@ static void i40e_xmit_pkt(struct i40e_ring *xdp_ring, struct xdp_desc *desc,
tx_desc = I40E_TX_DESC(xdp_ring, xdp_ring->next_to_use++);
tx_desc->buffer_addr = cpu_to_le64(dma);
tx_desc->cmd_type_offset_bsz = build_ctob(I40E_TX_DESC_CMD_ICRC | I40E_TX_DESC_CMD_EOP,
0, desc->len, 0);
tx_desc->cmd_type_offset_bsz = build_ctob(cmd, 0, desc->len, 0);
*total_bytes += desc->len;
}
@ -558,14 +558,14 @@ static void i40e_xmit_pkt_batch(struct i40e_ring *xdp_ring, struct xdp_desc *des
u32 i;
loop_unrolled_for(i = 0; i < PKTS_PER_BATCH; i++) {
u32 cmd = I40E_TX_DESC_CMD_ICRC | xsk_is_eop_desc(&desc[i]);
dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, desc[i].addr);
xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma, desc[i].len);
tx_desc = I40E_TX_DESC(xdp_ring, ntu++);
tx_desc->buffer_addr = cpu_to_le64(dma);
tx_desc->cmd_type_offset_bsz = build_ctob(I40E_TX_DESC_CMD_ICRC |
I40E_TX_DESC_CMD_EOP,
0, desc[i].len, 0);
tx_desc->cmd_type_offset_bsz = build_ctob(cmd, 0, desc[i].len, 0);
*total_bytes += desc[i].len;
}