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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2019 Netronome Systems, Inc. */
#include <linux/seq_file.h>
#include "../nfp_net.h"
#include "../nfp_net_dp.h"
#include "nfdk.h"
static void
nfp_nfdk_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
{
struct device *dev = dp->dev;
struct netdev_queue *nd_q;
while (!tx_ring->is_xdp && tx_ring->rd_p != tx_ring->wr_p) {
const skb_frag_t *frag, *fend;
unsigned int size, n_descs = 1;
struct nfp_nfdk_tx_buf *txbuf;
int nr_frags, rd_idx;
struct sk_buff *skb;
rd_idx = D_IDX(tx_ring, tx_ring->rd_p);
txbuf = &tx_ring->ktxbufs[rd_idx];
skb = txbuf->skb;
if (!skb) {
n_descs = D_BLOCK_CPL(tx_ring->rd_p);
goto next;
}
nr_frags = skb_shinfo(skb)->nr_frags;
txbuf++;
/* Unmap head */
size = skb_headlen(skb);
dma_unmap_single(dev, txbuf->dma_addr, size, DMA_TO_DEVICE);
n_descs += nfp_nfdk_headlen_to_segs(size);
txbuf++;
frag = skb_shinfo(skb)->frags;
fend = frag + nr_frags;
for (; frag < fend; frag++) {
size = skb_frag_size(frag);
dma_unmap_page(dev, txbuf->dma_addr,
skb_frag_size(frag), DMA_TO_DEVICE);
n_descs += DIV_ROUND_UP(size,
NFDK_TX_MAX_DATA_PER_DESC);
txbuf++;
}
if (skb_is_gso(skb))
n_descs++;
dev_kfree_skb_any(skb);
next:
tx_ring->rd_p += n_descs;
}
memset(tx_ring->txds, 0, tx_ring->size);
tx_ring->data_pending = 0;
tx_ring->wr_p = 0;
tx_ring->rd_p = 0;
tx_ring->qcp_rd_p = 0;
tx_ring->wr_ptr_add = 0;
if (tx_ring->is_xdp || !dp->netdev)
return;
nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx);
netdev_tx_reset_queue(nd_q);
}
static void nfp_nfdk_tx_ring_free(struct nfp_net_tx_ring *tx_ring)
{
struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
kvfree(tx_ring->ktxbufs);
if (tx_ring->ktxds)
dma_free_coherent(dp->dev, tx_ring->size,
tx_ring->ktxds, tx_ring->dma);
tx_ring->cnt = 0;
tx_ring->txbufs = NULL;
tx_ring->txds = NULL;
tx_ring->dma = 0;
tx_ring->size = 0;
}
static int
nfp_nfdk_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
{
struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
tx_ring->cnt = dp->txd_cnt * NFDK_TX_DESC_PER_SIMPLE_PKT;
tx_ring->size = array_size(tx_ring->cnt, sizeof(*tx_ring->ktxds));
tx_ring->ktxds = dma_alloc_coherent(dp->dev, tx_ring->size,
&tx_ring->dma,
GFP_KERNEL | __GFP_NOWARN);
if (!tx_ring->ktxds) {
netdev_warn(dp->netdev, "failed to allocate TX descriptor ring memory, requested descriptor count: %d, consider lowering descriptor count\n",
tx_ring->cnt);
goto err_alloc;
}
tx_ring->ktxbufs = kvcalloc(tx_ring->cnt, sizeof(*tx_ring->ktxbufs),
GFP_KERNEL);
if (!tx_ring->ktxbufs)
goto err_alloc;
if (!tx_ring->is_xdp && dp->netdev)
netif_set_xps_queue(dp->netdev, &r_vec->affinity_mask,
tx_ring->idx);
return 0;
err_alloc:
nfp_nfdk_tx_ring_free(tx_ring);
return -ENOMEM;
}
static void
nfp_nfdk_tx_ring_bufs_free(struct nfp_net_dp *dp,
struct nfp_net_tx_ring *tx_ring)
{
}
static int
nfp_nfdk_tx_ring_bufs_alloc(struct nfp_net_dp *dp,
struct nfp_net_tx_ring *tx_ring)
{
return 0;
}
static void
nfp_nfdk_print_tx_descs(struct seq_file *file,
struct nfp_net_r_vector *r_vec,
struct nfp_net_tx_ring *tx_ring,
u32 d_rd_p, u32 d_wr_p)
{
struct nfp_nfdk_tx_desc *txd;
u32 txd_cnt = tx_ring->cnt;
int i;
for (i = 0; i < txd_cnt; i++) {
txd = &tx_ring->ktxds[i];
seq_printf(file, "%04d: 0x%08x 0x%08x 0x%016llx", i,
txd->vals[0], txd->vals[1], tx_ring->ktxbufs[i].raw);
if (i == tx_ring->rd_p % txd_cnt)
seq_puts(file, " H_RD");
if (i == tx_ring->wr_p % txd_cnt)
seq_puts(file, " H_WR");
if (i == d_rd_p % txd_cnt)
seq_puts(file, " D_RD");
if (i == d_wr_p % txd_cnt)
seq_puts(file, " D_WR");
seq_putc(file, '\n');
}
}
#define NFP_NFDK_CFG_CTRL_SUPPORTED \
(NFP_NET_CFG_CTRL_ENABLE | NFP_NET_CFG_CTRL_PROMISC | \
NFP_NET_CFG_CTRL_L2BC | NFP_NET_CFG_CTRL_L2MC | \
NFP_NET_CFG_CTRL_RXCSUM | NFP_NET_CFG_CTRL_TXCSUM | \
NFP_NET_CFG_CTRL_RXVLAN | \
NFP_NET_CFG_CTRL_GATHER | NFP_NET_CFG_CTRL_LSO | \
NFP_NET_CFG_CTRL_CTAG_FILTER | NFP_NET_CFG_CTRL_CMSG_DATA | \
NFP_NET_CFG_CTRL_RINGCFG | NFP_NET_CFG_CTRL_IRQMOD | \
NFP_NET_CFG_CTRL_TXRWB | \
NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE | \
NFP_NET_CFG_CTRL_BPF | NFP_NET_CFG_CTRL_LSO2 | \
NFP_NET_CFG_CTRL_RSS2 | NFP_NET_CFG_CTRL_CSUM_COMPLETE | \
NFP_NET_CFG_CTRL_LIVE_ADDR)
const struct nfp_dp_ops nfp_nfdk_ops = {
.version = NFP_NFD_VER_NFDK,
.tx_min_desc_per_pkt = NFDK_TX_DESC_PER_SIMPLE_PKT,
.cap_mask = NFP_NFDK_CFG_CTRL_SUPPORTED,
.poll = nfp_nfdk_poll,
.ctrl_poll = nfp_nfdk_ctrl_poll,
.xmit = nfp_nfdk_tx,
.ctrl_tx_one = nfp_nfdk_ctrl_tx_one,
.rx_ring_fill_freelist = nfp_nfdk_rx_ring_fill_freelist,
.tx_ring_alloc = nfp_nfdk_tx_ring_alloc,
.tx_ring_reset = nfp_nfdk_tx_ring_reset,
.tx_ring_free = nfp_nfdk_tx_ring_free,
.tx_ring_bufs_alloc = nfp_nfdk_tx_ring_bufs_alloc,
.tx_ring_bufs_free = nfp_nfdk_tx_ring_bufs_free,
.print_tx_descs = nfp_nfdk_print_tx_descs
};
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