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path: root/drivers/net/ethernet/intel/ice/ice_xsk.c
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Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_xsk.c')
-rw-r--r--drivers/net/ethernet/intel/ice/ice_xsk.c146
1 files changed, 21 insertions, 125 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_xsk.c b/drivers/net/ethernet/intel/ice/ice_xsk.c
index 575fd48f485f..989ff1fd9110 100644
--- a/drivers/net/ethernet/intel/ice/ice_xsk.c
+++ b/drivers/net/ethernet/intel/ice/ice_xsk.c
@@ -3,6 +3,7 @@
#include <linux/bpf_trace.h>
#include <linux/unroll.h>
+#include <net/libeth/xdp.h>
#include <net/xdp_sock_drv.h>
#include <net/xdp.h>
#include "ice.h"
@@ -169,50 +170,18 @@ ice_xsk_pool_enable(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid)
* If allocation was successful, substitute buffer with allocated one.
* Returns 0 on success, negative on failure
*/
-static int
+int
ice_realloc_rx_xdp_bufs(struct ice_rx_ring *rx_ring, bool pool_present)
{
- size_t elem_size = pool_present ? sizeof(*rx_ring->xdp_buf) :
- sizeof(*rx_ring->rx_buf);
- void *sw_ring = kcalloc(rx_ring->count, elem_size, GFP_KERNEL);
-
- if (!sw_ring)
- return -ENOMEM;
-
if (pool_present) {
- kfree(rx_ring->rx_buf);
- rx_ring->rx_buf = NULL;
- rx_ring->xdp_buf = sw_ring;
+ rx_ring->xdp_buf = kcalloc(rx_ring->count,
+ sizeof(*rx_ring->xdp_buf),
+ GFP_KERNEL);
+ if (!rx_ring->xdp_buf)
+ return -ENOMEM;
} else {
kfree(rx_ring->xdp_buf);
rx_ring->xdp_buf = NULL;
- rx_ring->rx_buf = sw_ring;
- }
-
- return 0;
-}
-
-/**
- * ice_realloc_zc_buf - reallocate XDP ZC queue pairs
- * @vsi: Current VSI
- * @zc: is zero copy set
- *
- * Reallocate buffer for rx_rings that might be used by XSK.
- * XDP requires more memory, than rx_buf provides.
- * Returns 0 on success, negative on failure
- */
-int ice_realloc_zc_buf(struct ice_vsi *vsi, bool zc)
-{
- struct ice_rx_ring *rx_ring;
- uint i;
-
- ice_for_each_rxq(vsi, i) {
- rx_ring = vsi->rx_rings[i];
- if (!rx_ring->xsk_pool)
- continue;
-
- if (ice_realloc_rx_xdp_bufs(rx_ring, zc))
- return -ENOMEM;
}
return 0;
@@ -228,6 +197,7 @@ int ice_realloc_zc_buf(struct ice_vsi *vsi, bool zc)
*/
int ice_xsk_pool_setup(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid)
{
+ struct ice_rx_ring *rx_ring = vsi->rx_rings[qid];
bool if_running, pool_present = !!pool;
int ret = 0, pool_failure = 0;
@@ -241,8 +211,6 @@ int ice_xsk_pool_setup(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid)
ice_is_xdp_ena_vsi(vsi);
if (if_running) {
- struct ice_rx_ring *rx_ring = vsi->rx_rings[qid];
-
ret = ice_qp_dis(vsi, qid);
if (ret) {
netdev_err(vsi->netdev, "ice_qp_dis error = %d\n", ret);
@@ -303,11 +271,6 @@ static u16 ice_fill_rx_descs(struct xsk_buff_pool *pool, struct xdp_buff **xdp,
rx_desc->read.pkt_addr = cpu_to_le64(dma);
rx_desc->wb.status_error0 = 0;
- /* Put private info that changes on a per-packet basis
- * into xdp_buff_xsk->cb.
- */
- ice_xdp_meta_set_desc(*xdp, rx_desc);
-
rx_desc++;
xdp++;
}
@@ -393,69 +356,6 @@ bool ice_alloc_rx_bufs_zc(struct ice_rx_ring *rx_ring,
}
/**
- * ice_construct_skb_zc - Create an sk_buff from zero-copy buffer
- * @rx_ring: Rx ring
- * @xdp: Pointer to XDP buffer
- *
- * This function allocates a new skb from a zero-copy Rx buffer.
- *
- * Returns the skb on success, NULL on failure.
- */
-static struct sk_buff *
-ice_construct_skb_zc(struct ice_rx_ring *rx_ring, struct xdp_buff *xdp)
-{
- unsigned int totalsize = xdp->data_end - xdp->data_meta;
- unsigned int metasize = xdp->data - xdp->data_meta;
- struct skb_shared_info *sinfo = NULL;
- struct sk_buff *skb;
- u32 nr_frags = 0;
-
- if (unlikely(xdp_buff_has_frags(xdp))) {
- sinfo = xdp_get_shared_info_from_buff(xdp);
- nr_frags = sinfo->nr_frags;
- }
- net_prefetch(xdp->data_meta);
-
- skb = napi_alloc_skb(&rx_ring->q_vector->napi, totalsize);
- if (unlikely(!skb))
- return NULL;
-
- memcpy(__skb_put(skb, totalsize), xdp->data_meta,
- ALIGN(totalsize, sizeof(long)));
-
- if (metasize) {
- skb_metadata_set(skb, metasize);
- __skb_pull(skb, metasize);
- }
-
- if (likely(!xdp_buff_has_frags(xdp)))
- goto out;
-
- for (int i = 0; i < nr_frags; i++) {
- struct skb_shared_info *skinfo = skb_shinfo(skb);
- skb_frag_t *frag = &sinfo->frags[i];
- struct page *page;
- void *addr;
-
- page = dev_alloc_page();
- if (!page) {
- dev_kfree_skb(skb);
- return NULL;
- }
- addr = page_to_virt(page);
-
- memcpy(addr, skb_frag_page(frag), skb_frag_size(frag));
-
- __skb_fill_page_desc_noacc(skinfo, skinfo->nr_frags++,
- addr, 0, skb_frag_size(frag));
- }
-
-out:
- xsk_buff_free(xdp);
- return skb;
-}
-
-/**
* ice_clean_xdp_irq_zc - produce AF_XDP descriptors to CQ
* @xdp_ring: XDP Tx ring
* @xsk_pool: AF_XDP buffer pool pointer
@@ -669,10 +569,10 @@ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring,
struct xsk_buff_pool *xsk_pool,
int budget)
{
+ struct xdp_buff *first = (struct xdp_buff *)rx_ring->xsk;
unsigned int total_rx_bytes = 0, total_rx_packets = 0;
u32 ntc = rx_ring->next_to_clean;
u32 ntu = rx_ring->next_to_use;
- struct xdp_buff *first = NULL;
struct ice_tx_ring *xdp_ring;
unsigned int xdp_xmit = 0;
struct bpf_prog *xdp_prog;
@@ -686,9 +586,6 @@ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring,
xdp_prog = READ_ONCE(rx_ring->xdp_prog);
xdp_ring = rx_ring->xdp_ring;
- if (ntc != rx_ring->first_desc)
- first = *ice_xdp_buf(rx_ring, rx_ring->first_desc);
-
while (likely(total_rx_packets < (unsigned int)budget)) {
union ice_32b_rx_flex_desc *rx_desc;
unsigned int size, xdp_res = 0;
@@ -724,15 +621,17 @@ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring,
first = xdp;
} else if (likely(size) && !xsk_buff_add_frag(first, xdp)) {
xsk_buff_free(first);
- break;
+ first = NULL;
}
if (++ntc == cnt)
ntc = 0;
- if (ice_is_non_eop(rx_ring, rx_desc))
+ if (ice_is_non_eop(rx_ring, rx_desc) || unlikely(!first))
continue;
+ ((struct libeth_xdp_buff *)first)->desc = rx_desc;
+
xdp_res = ice_run_xdp_zc(rx_ring, first, xdp_prog, xdp_ring,
xsk_pool);
if (likely(xdp_res & (ICE_XDP_TX | ICE_XDP_REDIR))) {
@@ -740,7 +639,6 @@ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring,
} else if (xdp_res == ICE_XDP_EXIT) {
failure = true;
first = NULL;
- rx_ring->first_desc = ntc;
break;
} else if (xdp_res == ICE_XDP_CONSUMED) {
xsk_buff_free(first);
@@ -752,24 +650,20 @@ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring,
total_rx_packets++;
first = NULL;
- rx_ring->first_desc = ntc;
continue;
construct_skb:
/* XDP_PASS path */
- skb = ice_construct_skb_zc(rx_ring, first);
+ skb = xdp_build_skb_from_zc(first);
if (!skb) {
+ xsk_buff_free(first);
+ first = NULL;
+
rx_ring->ring_stats->rx_stats.alloc_buf_failed++;
- break;
+ continue;
}
first = NULL;
- rx_ring->first_desc = ntc;
-
- if (eth_skb_pad(skb)) {
- skb = NULL;
- continue;
- }
total_rx_bytes += skb->len;
total_rx_packets++;
@@ -781,7 +675,9 @@ construct_skb:
}
rx_ring->next_to_clean = ntc;
- entries_to_alloc = ICE_RX_DESC_UNUSED(rx_ring);
+ rx_ring->xsk = (struct libeth_xdp_buff *)first;
+
+ entries_to_alloc = ICE_DESC_UNUSED(rx_ring);
if (entries_to_alloc > ICE_RING_QUARTER(rx_ring))
failure |= !ice_alloc_rx_bufs_zc(rx_ring, xsk_pool,
entries_to_alloc);
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-04 10:30:56 +0000