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nfp: use dp to carry fl_bufsz at reconfig time

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Use fl_bufsz member of data path struct to carry desired size of
free list entries.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2017-03-10 10:38:31 -08:00 committed by David S. Miller
parent 512e94dc32
commit 2195c2637f
2 changed files with 27 additions and 32 deletions
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3
drivers/net/ethernet/netronome/nfp/nfp_net.h
View File

@ -316,8 +316,6 @@ struct nfp_net_rx_buf {
* @rxds: Virtual address of FL/RX ring in host memory
* @dma: DMA address of the FL/RX ring
* @size: Size, in bytes, of the FL/RX ring (needed to free)
* @bufsz: Buffer allocation size for convenience of management routines
* (NOTE: this is in second cache line, do not use on fast path!)
*/
struct nfp_net_rx_ring {
struct nfp_net_r_vector *r_vec;
@ -339,7 +337,6 @@ struct nfp_net_rx_ring {
dma_addr_t dma;
unsigned int size;
unsigned int bufsz;
} ____cacheline_aligned;
/**

56
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
View File

@ -86,19 +86,19 @@ void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
}
static dma_addr_t
nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag, unsigned int bufsz,
int direction)
nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag, int direction)
{
return dma_map_single(dp->dev, frag + NFP_NET_RX_BUF_HEADROOM,
bufsz - NFP_NET_RX_BUF_NON_DATA, direction);
dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
direction);
}
static void
nfp_net_dma_unmap_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr,
unsigned int bufsz, int direction)
int direction)
{
dma_unmap_single(dp->dev, dma_addr,
bufsz - NFP_NET_RX_BUF_NON_DATA, direction);
dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, direction);
}
/* Firmware reconfig
@ -992,7 +992,7 @@ static void nfp_net_xdp_complete(struct nfp_net_tx_ring *tx_ring)
continue;
nfp_net_dma_unmap_rx(dp, tx_ring->txbufs[idx].dma_addr,
dp->fl_bufsz, DMA_BIDIRECTIONAL);
DMA_BIDIRECTIONAL);
__free_page(virt_to_page(tx_ring->txbufs[idx].frag));
done_pkts++;
@ -1038,7 +1038,7 @@ nfp_net_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
if (tx_ring == r_vec->xdp_ring) {
nfp_net_dma_unmap_rx(dp, tx_buf->dma_addr,
dp->fl_bufsz, DMA_BIDIRECTIONAL);
DMA_BIDIRECTIONAL);
__free_page(virt_to_page(tx_ring->txbufs[idx].frag));
} else {
struct sk_buff *skb = tx_ring->txbufs[idx].skb;
@ -1130,7 +1130,6 @@ nfp_net_free_frag(void *frag, bool xdp)
* @dp: NFP Net data path struct
* @rx_ring: RX ring structure of the skb
* @dma_addr: Pointer to storage for DMA address (output param)
* @fl_bufsz: size of freelist buffers
* @xdp: Whether XDP is enabled
*
* This function will allcate a new page frag, map it for DMA.
@ -1140,13 +1139,13 @@ nfp_net_free_frag(void *frag, bool xdp)
static void *
nfp_net_rx_alloc_one(struct nfp_net_dp *dp,
struct nfp_net_rx_ring *rx_ring, dma_addr_t *dma_addr,
unsigned int fl_bufsz, bool xdp)
bool xdp)
{
int direction;
void *frag;
if (!xdp)
frag = netdev_alloc_frag(fl_bufsz);
frag = netdev_alloc_frag(dp->fl_bufsz);
else
frag = page_address(alloc_page(GFP_KERNEL | __GFP_COLD));
if (!frag) {
@ -1156,7 +1155,7 @@ nfp_net_rx_alloc_one(struct nfp_net_dp *dp,
direction = xdp ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE;
*dma_addr = nfp_net_dma_map_rx(dp, frag, fl_bufsz, direction);
*dma_addr = nfp_net_dma_map_rx(dp, frag, direction);
if (dma_mapping_error(dp->dev, *dma_addr)) {
nfp_net_free_frag(frag, xdp);
nn_dp_warn(dp, "Failed to map DMA RX buffer\n");
@ -1181,7 +1180,7 @@ nfp_net_napi_alloc_one(struct nfp_net_dp *dp, int direction,
return NULL;
}
*dma_addr = nfp_net_dma_map_rx(dp, frag, dp->fl_bufsz, direction);
*dma_addr = nfp_net_dma_map_rx(dp, frag, direction);
if (dma_mapping_error(dp->dev, *dma_addr)) {
nfp_net_free_frag(frag, dp->xdp_prog);
nn_dp_warn(dp, "Failed to map DMA RX buffer\n");
@ -1276,7 +1275,7 @@ nfp_net_rx_ring_bufs_free(struct nfp_net_dp *dp,
continue;
nfp_net_dma_unmap_rx(dp, rx_ring->rxbufs[i].dma_addr,
rx_ring->bufsz, direction);
direction);
nfp_net_free_frag(rx_ring->rxbufs[i].frag, xdp);
rx_ring->rxbufs[i].dma_addr = 0;
rx_ring->rxbufs[i].frag = NULL;
@ -1301,7 +1300,7 @@ nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp *dp,
for (i = 0; i < rx_ring->cnt - 1; i++) {
rxbufs[i].frag =
nfp_net_rx_alloc_one(dp, rx_ring, &rxbufs[i].dma_addr,
rx_ring->bufsz, xdp);
xdp);
if (!rxbufs[i].frag) {
nfp_net_rx_ring_bufs_free(dp, rx_ring, xdp);
return -ENOMEM;
@ -1652,8 +1651,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
continue;
}
nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr, dp->fl_bufsz,
rx_dma_map_dir);
nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr, rx_dma_map_dir);
nfp_net_rx_give_one(rx_ring, new_frag, new_dma_addr);
@ -1865,23 +1863,19 @@ static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
/**
* nfp_net_rx_ring_alloc() - Allocate resource for a RX ring
* @dp: NFP Net data path struct
* @rx_ring: RX ring to allocate
* @fl_bufsz: Size of buffers to allocate
* @cnt: Ring buffer count
*
* Return: 0 on success, negative errno otherwise.
*/
static int
nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring, unsigned int fl_bufsz,
nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring,
u32 cnt)
{
struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
int sz;
rx_ring->cnt = cnt;
rx_ring->bufsz = fl_bufsz;
rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt;
rx_ring->rxds = dma_zalloc_coherent(dp->dev, rx_ring->size,
&rx_ring->dma, GFP_KERNEL);
@ -1904,7 +1898,6 @@ static struct nfp_net_rx_ring *
nfp_net_rx_ring_set_prepare(struct nfp_net *nn, struct nfp_net_dp *dp,
struct nfp_net_ring_set *s, bool xdp)
{
unsigned int fl_bufsz = nfp_net_calc_fl_bufsz(dp, s->mtu);
struct nfp_net_rx_ring *rings;
unsigned int r;
@ -1915,7 +1908,7 @@ nfp_net_rx_ring_set_prepare(struct nfp_net *nn, struct nfp_net_dp *dp,
for (r = 0; r < s->n_rings; r++) {
nfp_net_rx_ring_init(&rings[r], &nn->r_vecs[r], r);
if (nfp_net_rx_ring_alloc(&rings[r], fl_bufsz, s->dcnt))
if (nfp_net_rx_ring_alloc(dp, &rings[r], s->dcnt))
goto err_free_prev;
if (nfp_net_rx_ring_bufs_alloc(dp, &rings[r], xdp))
@ -1935,17 +1928,20 @@ err_free_ring:
}
static void
nfp_net_rx_ring_set_swap(struct nfp_net *nn, struct nfp_net_ring_set *s)
nfp_net_rx_ring_set_swap(struct nfp_net *nn, struct nfp_net_dp *dp,
struct nfp_net_ring_set *s)
{
struct nfp_net_ring_set new = *s;
struct nfp_net_dp new_dp = *dp;
dp->fl_bufsz = nn->dp.fl_bufsz;
s->mtu = nn->dp.netdev->mtu;
s->dcnt = nn->dp.rxd_cnt;
s->rings = nn->dp.rx_rings;
s->n_rings = nn->dp.num_rx_rings;
nn->dp.netdev->mtu = new.mtu;
nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp, new.mtu);
nn->dp.fl_bufsz = new_dp.fl_bufsz;
nn->dp.rxd_cnt = new.dcnt;
nn->dp.rx_rings = new.rings;
nn->dp.num_rx_rings = new.n_rings;
@ -2482,7 +2478,7 @@ nfp_net_ring_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp,
int err;
if (rx)
nfp_net_rx_ring_set_swap(nn, rx);
nfp_net_rx_ring_set_swap(nn, dp, rx);
if (tx)
nfp_net_tx_ring_set_swap(nn, tx);
@ -2538,7 +2534,7 @@ nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp,
/* XDP-enabled tests */
if (!xdp_prog)
return 0;
if (rx && nfp_net_calc_fl_bufsz(dp, rx->mtu) > PAGE_SIZE) {
if (dp->fl_bufsz > PAGE_SIZE) {
nn_warn(nn, "MTU too large w/ XDP enabled\n");
return -EINVAL;
}
@ -2559,7 +2555,6 @@ nfp_net_ring_reconfig_down(struct nfp_net *nn, struct nfp_net_dp *dp,
nfp_net_dp_swap(nn, dp);
nn->dp.netdev->mtu = rx ? rx->mtu : nn->dp.netdev->mtu;
nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp, nn->dp.netdev->mtu);
nn->dp.rxd_cnt = rx ? rx->dcnt : nn->dp.rxd_cnt;
nn->dp.txd_cnt = tx ? tx->dcnt : nn->dp.txd_cnt;
nn->dp.num_rx_rings = rx ? rx->n_rings : nn->dp.num_rx_rings;
@ -2577,6 +2572,9 @@ nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp,
{
int r, err;
dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp,
rx ? rx->mtu : nn->dp.netdev->mtu);
dp->num_stack_tx_rings = tx ? tx->n_rings : dp->num_tx_rings;
if (*xdp_prog)
dp->num_stack_tx_rings -= rx ? rx->n_rings : dp->num_rx_rings;