@@ -24,6 +24,7 @@ Features of the CNXK Ethdev PMD are:
- Receiver Side Scaling (RSS)
- Link state information
- Scatter-Gather IO support
+- Vector Poll mode driver
Prerequisites
-------------
@@ -2,6 +2,8 @@
* Copyright(C) 2021 Marvell.
*/
+#include <rte_vect.h>
+
#include "cn10k_ethdev.h"
#include "cn10k_rx.h"
@@ -83,6 +85,223 @@ nix_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts,
return nb_pkts;
}
+#if defined(RTE_ARCH_ARM64)
+
+static __rte_always_inline uint16_t
+nix_recv_pkts_vector(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts,
+ const uint16_t flags)
+{
+ struct cn10k_eth_rxq *rxq = rx_queue;
+ uint16_t packets = 0;
+ uint64x2_t cq0_w8, cq1_w8, cq2_w8, cq3_w8, mbuf01, mbuf23;
+ const uint64_t mbuf_initializer = rxq->mbuf_initializer;
+ const uint64x2_t data_off = vdupq_n_u64(rxq->data_off);
+ uint64_t ol_flags0, ol_flags1, ol_flags2, ol_flags3;
+ uint64x2_t rearm0 = vdupq_n_u64(mbuf_initializer);
+ uint64x2_t rearm1 = vdupq_n_u64(mbuf_initializer);
+ uint64x2_t rearm2 = vdupq_n_u64(mbuf_initializer);
+ uint64x2_t rearm3 = vdupq_n_u64(mbuf_initializer);
+ struct rte_mbuf *mbuf0, *mbuf1, *mbuf2, *mbuf3;
+ const uint16_t *lookup_mem = rxq->lookup_mem;
+ const uint32_t qmask = rxq->qmask;
+ const uint64_t wdata = rxq->wdata;
+ const uintptr_t desc = rxq->desc;
+ uint8x16_t f0, f1, f2, f3;
+ uint32_t head = rxq->head;
+ uint16_t pkts_left;
+
+ pkts = nix_rx_nb_pkts(rxq, wdata, pkts, qmask);
+ pkts_left = pkts & (NIX_DESCS_PER_LOOP - 1);
+
+ /* Packets has to be floor-aligned to NIX_DESCS_PER_LOOP */
+ pkts = RTE_ALIGN_FLOOR(pkts, NIX_DESCS_PER_LOOP);
+
+ while (packets < pkts) {
+ /* Exit loop if head is about to wrap and become unaligned */
+ if (((head + NIX_DESCS_PER_LOOP - 1) & qmask) <
+ NIX_DESCS_PER_LOOP) {
+ pkts_left += (pkts - packets);
+ break;
+ }
+
+ const uintptr_t cq0 = desc + CQE_SZ(head);
+
+ /* Prefetch N desc ahead */
+ rte_prefetch_non_temporal((void *)(cq0 + CQE_SZ(8)));
+ rte_prefetch_non_temporal((void *)(cq0 + CQE_SZ(9)));
+ rte_prefetch_non_temporal((void *)(cq0 + CQE_SZ(10)));
+ rte_prefetch_non_temporal((void *)(cq0 + CQE_SZ(11)));
+
+ /* Get NIX_RX_SG_S for size and buffer pointer */
+ cq0_w8 = vld1q_u64((uint64_t *)(cq0 + CQE_SZ(0) + 64));
+ cq1_w8 = vld1q_u64((uint64_t *)(cq0 + CQE_SZ(1) + 64));
+ cq2_w8 = vld1q_u64((uint64_t *)(cq0 + CQE_SZ(2) + 64));
+ cq3_w8 = vld1q_u64((uint64_t *)(cq0 + CQE_SZ(3) + 64));
+
+ /* Extract mbuf from NIX_RX_SG_S */
+ mbuf01 = vzip2q_u64(cq0_w8, cq1_w8);
+ mbuf23 = vzip2q_u64(cq2_w8, cq3_w8);
+ mbuf01 = vqsubq_u64(mbuf01, data_off);
+ mbuf23 = vqsubq_u64(mbuf23, data_off);
+
+ /* Move mbufs to scalar registers for future use */
+ mbuf0 = (struct rte_mbuf *)vgetq_lane_u64(mbuf01, 0);
+ mbuf1 = (struct rte_mbuf *)vgetq_lane_u64(mbuf01, 1);
+ mbuf2 = (struct rte_mbuf *)vgetq_lane_u64(mbuf23, 0);
+ mbuf3 = (struct rte_mbuf *)vgetq_lane_u64(mbuf23, 1);
+
+ /* Mask to get packet len from NIX_RX_SG_S */
+ const uint8x16_t shuf_msk = {
+ 0xFF, 0xFF, /* pkt_type set as unknown */
+ 0xFF, 0xFF, /* pkt_type set as unknown */
+ 0, 1, /* octet 1~0, low 16 bits pkt_len */
+ 0xFF, 0xFF, /* skip high 16 bits pkt_len, zero out */
+ 0, 1, /* octet 1~0, 16 bits data_len */
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+
+ /* Form the rx_descriptor_fields1 with pkt_len and data_len */
+ f0 = vqtbl1q_u8(cq0_w8, shuf_msk);
+ f1 = vqtbl1q_u8(cq1_w8, shuf_msk);
+ f2 = vqtbl1q_u8(cq2_w8, shuf_msk);
+ f3 = vqtbl1q_u8(cq3_w8, shuf_msk);
+
+ /* Load CQE word0 and word 1 */
+ uint64_t cq0_w0 = ((uint64_t *)(cq0 + CQE_SZ(0)))[0];
+ uint64_t cq0_w1 = ((uint64_t *)(cq0 + CQE_SZ(0)))[1];
+ uint64_t cq1_w0 = ((uint64_t *)(cq0 + CQE_SZ(1)))[0];
+ uint64_t cq1_w1 = ((uint64_t *)(cq0 + CQE_SZ(1)))[1];
+ uint64_t cq2_w0 = ((uint64_t *)(cq0 + CQE_SZ(2)))[0];
+ uint64_t cq2_w1 = ((uint64_t *)(cq0 + CQE_SZ(2)))[1];
+ uint64_t cq3_w0 = ((uint64_t *)(cq0 + CQE_SZ(3)))[0];
+ uint64_t cq3_w1 = ((uint64_t *)(cq0 + CQE_SZ(3)))[1];
+
+ if (flags & NIX_RX_OFFLOAD_RSS_F) {
+ /* Fill rss in the rx_descriptor_fields1 */
+ f0 = vsetq_lane_u32(cq0_w0, f0, 3);
+ f1 = vsetq_lane_u32(cq1_w0, f1, 3);
+ f2 = vsetq_lane_u32(cq2_w0, f2, 3);
+ f3 = vsetq_lane_u32(cq3_w0, f3, 3);
+ ol_flags0 = PKT_RX_RSS_HASH;
+ ol_flags1 = PKT_RX_RSS_HASH;
+ ol_flags2 = PKT_RX_RSS_HASH;
+ ol_flags3 = PKT_RX_RSS_HASH;
+ } else {
+ ol_flags0 = 0;
+ ol_flags1 = 0;
+ ol_flags2 = 0;
+ ol_flags3 = 0;
+ }
+
+ if (flags & NIX_RX_OFFLOAD_PTYPE_F) {
+ /* Fill packet_type in the rx_descriptor_fields1 */
+ f0 = vsetq_lane_u32(nix_ptype_get(lookup_mem, cq0_w1),
+ f0, 0);
+ f1 = vsetq_lane_u32(nix_ptype_get(lookup_mem, cq1_w1),
+ f1, 0);
+ f2 = vsetq_lane_u32(nix_ptype_get(lookup_mem, cq2_w1),
+ f2, 0);
+ f3 = vsetq_lane_u32(nix_ptype_get(lookup_mem, cq3_w1),
+ f3, 0);
+ }
+
+ if (flags & NIX_RX_OFFLOAD_CHECKSUM_F) {
+ ol_flags0 |= nix_rx_olflags_get(lookup_mem, cq0_w1);
+ ol_flags1 |= nix_rx_olflags_get(lookup_mem, cq1_w1);
+ ol_flags2 |= nix_rx_olflags_get(lookup_mem, cq2_w1);
+ ol_flags3 |= nix_rx_olflags_get(lookup_mem, cq3_w1);
+ }
+
+ if (flags & NIX_RX_OFFLOAD_MARK_UPDATE_F) {
+ ol_flags0 = nix_update_match_id(
+ *(uint16_t *)(cq0 + CQE_SZ(0) + 38), ol_flags0,
+ mbuf0);
+ ol_flags1 = nix_update_match_id(
+ *(uint16_t *)(cq0 + CQE_SZ(1) + 38), ol_flags1,
+ mbuf1);
+ ol_flags2 = nix_update_match_id(
+ *(uint16_t *)(cq0 + CQE_SZ(2) + 38), ol_flags2,
+ mbuf2);
+ ol_flags3 = nix_update_match_id(
+ *(uint16_t *)(cq0 + CQE_SZ(3) + 38), ol_flags3,
+ mbuf3);
+ }
+
+ /* Form rearm_data with ol_flags */
+ rearm0 = vsetq_lane_u64(ol_flags0, rearm0, 1);
+ rearm1 = vsetq_lane_u64(ol_flags1, rearm1, 1);
+ rearm2 = vsetq_lane_u64(ol_flags2, rearm2, 1);
+ rearm3 = vsetq_lane_u64(ol_flags3, rearm3, 1);
+
+ /* Update rx_descriptor_fields1 */
+ vst1q_u64((uint64_t *)mbuf0->rx_descriptor_fields1, f0);
+ vst1q_u64((uint64_t *)mbuf1->rx_descriptor_fields1, f1);
+ vst1q_u64((uint64_t *)mbuf2->rx_descriptor_fields1, f2);
+ vst1q_u64((uint64_t *)mbuf3->rx_descriptor_fields1, f3);
+
+ /* Update rearm_data */
+ vst1q_u64((uint64_t *)mbuf0->rearm_data, rearm0);
+ vst1q_u64((uint64_t *)mbuf1->rearm_data, rearm1);
+ vst1q_u64((uint64_t *)mbuf2->rearm_data, rearm2);
+ vst1q_u64((uint64_t *)mbuf3->rearm_data, rearm3);
+
+ /* Update that no more segments */
+ mbuf0->next = NULL;
+ mbuf1->next = NULL;
+ mbuf2->next = NULL;
+ mbuf3->next = NULL;
+
+ /* Store the mbufs to rx_pkts */
+ vst1q_u64((uint64_t *)&rx_pkts[packets], mbuf01);
+ vst1q_u64((uint64_t *)&rx_pkts[packets + 2], mbuf23);
+
+ /* Prefetch mbufs */
+ roc_prefetch_store_keep(mbuf0);
+ roc_prefetch_store_keep(mbuf1);
+ roc_prefetch_store_keep(mbuf2);
+ roc_prefetch_store_keep(mbuf3);
+
+ /* Mark mempool obj as "get" as it is alloc'ed by NIX */
+ __mempool_check_cookies(mbuf0->pool, (void **)&mbuf0, 1, 1);
+ __mempool_check_cookies(mbuf1->pool, (void **)&mbuf1, 1, 1);
+ __mempool_check_cookies(mbuf2->pool, (void **)&mbuf2, 1, 1);
+ __mempool_check_cookies(mbuf3->pool, (void **)&mbuf3, 1, 1);
+
+ /* Advance head pointer and packets */
+ head += NIX_DESCS_PER_LOOP;
+ head &= qmask;
+ packets += NIX_DESCS_PER_LOOP;
+ }
+
+ rxq->head = head;
+ rxq->available -= packets;
+
+ rte_io_wmb();
+ /* Free all the CQs that we've processed */
+ plt_write64((rxq->wdata | packets), rxq->cq_door);
+
+ if (unlikely(pkts_left))
+ packets += nix_recv_pkts(rx_queue, &rx_pkts[packets], pkts_left,
+ flags);
+
+ return packets;
+}
+
+#else
+
+static inline uint16_t
+nix_recv_pkts_vector(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts,
+ const uint16_t flags)
+{
+ RTE_SET_USED(rx_queue);
+ RTE_SET_USED(rx_pkts);
+ RTE_SET_USED(pkts);
+ RTE_SET_USED(flags);
+
+ return 0;
+}
+
+#endif
+
#define R(name, f3, f2, f1, f0, flags) \
static uint16_t __rte_noinline __rte_hot cn10k_nix_recv_pkts_##name( \
void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts) \
@@ -97,6 +316,14 @@ nix_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts,
{ \
return nix_recv_pkts(rx_queue, rx_pkts, pkts, \
(flags) | NIX_RX_MULTI_SEG_F); \
+ } \
+ \
+ static uint16_t __rte_noinline __rte_hot \
+ cn10k_nix_recv_pkts_vec_##name(void *rx_queue, \
+ struct rte_mbuf **rx_pkts, \
+ uint16_t pkts) \
+ { \
+ return nix_recv_pkts_vector(rx_queue, rx_pkts, pkts, (flags)); \
}
NIX_RX_FASTPATH_MODES
@@ -137,7 +364,18 @@ cn10k_eth_set_rx_function(struct rte_eth_dev *eth_dev)
#undef R
};
- pick_rx_func(eth_dev, nix_eth_rx_burst);
+ const eth_rx_burst_t nix_eth_rx_vec_burst[2][2][2][2] = {
+#define R(name, f3, f2, f1, f0, flags) \
+ [f3][f2][f1][f0] = cn10k_nix_recv_pkts_vec_##name,
+
+ NIX_RX_FASTPATH_MODES
+#undef R
+ };
+
+ if (dev->scalar_ena)
+ pick_rx_func(eth_dev, nix_eth_rx_burst);
+ else
+ pick_rx_func(eth_dev, nix_eth_rx_vec_burst);
if (dev->rx_offloads & DEV_RX_OFFLOAD_SCATTER)
pick_rx_func(eth_dev, nix_eth_rx_burst_mseg);