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numam-dpdk/drivers/net/cnxk/cn10k_rx.h
Jerin Jacob 77100cc8fe net/cnxk: add vector Rx for CN10K 
Add Rx burst vector version for CN10K.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
2021-06-29 23:24:49 +02:00

523 lines
16 KiB
C
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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(C) 2021 Marvell.
*/
#ifndef __CN10K_RX_H__
#define __CN10K_RX_H__
#include <rte_ether.h>
#include <rte_vect.h>
#define NIX_RX_OFFLOAD_NONE (0)
#define NIX_RX_OFFLOAD_RSS_F BIT(0)
#define NIX_RX_OFFLOAD_PTYPE_F BIT(1)
#define NIX_RX_OFFLOAD_CHECKSUM_F BIT(2)
#define NIX_RX_OFFLOAD_MARK_UPDATE_F BIT(3)
/* Flags to control cqe_to_mbuf conversion function.
* Defining it from backwards to denote its been
* not used as offload flags to pick function
*/
#define NIX_RX_MULTI_SEG_F BIT(15)
#define CNXK_NIX_CQ_ENTRY_SZ 128
#define NIX_DESCS_PER_LOOP 4
#define CQE_CAST(x) ((struct nix_cqe_hdr_s *)(x))
#define CQE_SZ(x) ((x) * CNXK_NIX_CQ_ENTRY_SZ)
union mbuf_initializer {
struct {
uint16_t data_off;
uint16_t refcnt;
uint16_t nb_segs;
uint16_t port;
} fields;
uint64_t value;
};
static __rte_always_inline uint64_t
nix_clear_data_off(uint64_t oldval)
{
union mbuf_initializer mbuf_init = {.value = oldval};
mbuf_init.fields.data_off = 0;
return mbuf_init.value;
}
static __rte_always_inline struct rte_mbuf *
nix_get_mbuf_from_cqe(void *cq, const uint64_t data_off)
{
rte_iova_t buff;
/* Skip CQE, NIX_RX_PARSE_S and SG HDR(9 DWORDs) and peek buff addr */
buff = *((rte_iova_t *)((uint64_t *)cq + 9));
return (struct rte_mbuf *)(buff - data_off);
}
static __rte_always_inline uint32_t
nix_ptype_get(const void *const lookup_mem, const uint64_t in)
{
const uint16_t *const ptype = lookup_mem;
const uint16_t lh_lg_lf = (in & 0xFFF0000000000000) >> 52;
const uint16_t tu_l2 = ptype[(in & 0x000FFFF000000000) >> 36];
const uint16_t il4_tu = ptype[PTYPE_NON_TUNNEL_ARRAY_SZ + lh_lg_lf];
return (il4_tu << PTYPE_NON_TUNNEL_WIDTH) | tu_l2;
}
static __rte_always_inline uint32_t
nix_rx_olflags_get(const void *const lookup_mem, const uint64_t in)
{
const uint32_t *const ol_flags =
(const uint32_t *)((const uint8_t *)lookup_mem +
PTYPE_ARRAY_SZ);
return ol_flags[(in & 0xfff00000) >> 20];
}
static inline uint64_t
nix_update_match_id(const uint16_t match_id, uint64_t ol_flags,
struct rte_mbuf *mbuf)
{
/* There is no separate bit to check match_id
* is valid or not? and no flag to identify it is an
* RTE_FLOW_ACTION_TYPE_FLAG vs RTE_FLOW_ACTION_TYPE_MARK
* action. The former case addressed through 0 being invalid
* value and inc/dec match_id pair when MARK is activated.
* The later case addressed through defining
* CNXK_FLOW_MARK_DEFAULT as value for
* RTE_FLOW_ACTION_TYPE_MARK.
* This would translate to not use
* CNXK_FLOW_ACTION_FLAG_DEFAULT - 1 and
* CNXK_FLOW_ACTION_FLAG_DEFAULT for match_id.
* i.e valid mark_id's are from
* 0 to CNXK_FLOW_ACTION_FLAG_DEFAULT - 2
*/
if (likely(match_id)) {
ol_flags |= PKT_RX_FDIR;
if (match_id != CNXK_FLOW_ACTION_FLAG_DEFAULT) {
ol_flags |= PKT_RX_FDIR_ID;
mbuf->hash.fdir.hi = match_id - 1;
}
}
return ol_flags;
}
static __rte_always_inline void
nix_cqe_xtract_mseg(const union nix_rx_parse_u *rx, struct rte_mbuf *mbuf,
uint64_t rearm)
{
const rte_iova_t *iova_list;
struct rte_mbuf *head;
const rte_iova_t *eol;
uint8_t nb_segs;
uint64_t sg;
sg = *(const uint64_t *)(rx + 1);
nb_segs = (sg >> 48) & 0x3;
mbuf->nb_segs = nb_segs;
mbuf->data_len = sg & 0xFFFF;
sg = sg >> 16;
eol = ((const rte_iova_t *)(rx + 1) + ((rx->desc_sizem1 + 1) << 1));
/* Skip SG_S and first IOVA*/
iova_list = ((const rte_iova_t *)(rx + 1)) + 2;
nb_segs--;
rearm = rearm & ~0xFFFF;
head = mbuf;
while (nb_segs) {
mbuf->next = ((struct rte_mbuf *)*iova_list) - 1;
mbuf = mbuf->next;
__mempool_check_cookies(mbuf->pool, (void **)&mbuf, 1, 1);
mbuf->data_len = sg & 0xFFFF;
sg = sg >> 16;
*(uint64_t *)(&mbuf->rearm_data) = rearm;
nb_segs--;
iova_list++;
if (!nb_segs && (iova_list + 1 < eol)) {
sg = *(const uint64_t *)(iova_list);
nb_segs = (sg >> 48) & 0x3;
head->nb_segs += nb_segs;
iova_list = (const rte_iova_t *)(iova_list + 1);
}
}
mbuf->next = NULL;
}
static __rte_always_inline void
cn10k_nix_cqe_to_mbuf(const struct nix_cqe_hdr_s *cq, const uint32_t tag,
struct rte_mbuf *mbuf, const void *lookup_mem,
const uint64_t val, const uint16_t flag)
{
const union nix_rx_parse_u *rx =
(const union nix_rx_parse_u *)((const uint64_t *)cq + 1);
const uint16_t len = rx->pkt_lenm1 + 1;
const uint64_t w1 = *(const uint64_t *)rx;
uint64_t ol_flags = 0;
/* Mark mempool obj as "get" as it is alloc'ed by NIX */
__mempool_check_cookies(mbuf->pool, (void **)&mbuf, 1, 1);
if (flag & NIX_RX_OFFLOAD_PTYPE_F)
mbuf->packet_type = nix_ptype_get(lookup_mem, w1);
else
mbuf->packet_type = 0;
if (flag & NIX_RX_OFFLOAD_RSS_F) {
mbuf->hash.rss = tag;
ol_flags |= PKT_RX_RSS_HASH;
}
if (flag & NIX_RX_OFFLOAD_CHECKSUM_F)
ol_flags |= nix_rx_olflags_get(lookup_mem, w1);
if (flag & NIX_RX_OFFLOAD_MARK_UPDATE_F)
ol_flags = nix_update_match_id(rx->match_id, ol_flags, mbuf);
mbuf->ol_flags = ol_flags;
*(uint64_t *)(&mbuf->rearm_data) = val;
mbuf->pkt_len = len;
if (flag & NIX_RX_MULTI_SEG_F) {
nix_cqe_xtract_mseg(rx, mbuf, val);
} else {
mbuf->data_len = len;
mbuf->next = NULL;
}
}
static inline uint16_t
nix_rx_nb_pkts(struct cn10k_eth_rxq *rxq, const uint64_t wdata,
const uint16_t pkts, const uint32_t qmask)
{
uint32_t available = rxq->available;
/* Update the available count if cached value is not enough */
if (unlikely(available < pkts)) {
uint64_t reg, head, tail;
/* Use LDADDA version to avoid reorder */
reg = roc_atomic64_add_sync(wdata, rxq->cq_status);
/* CQ_OP_STATUS operation error */
if (reg & BIT_ULL(NIX_CQ_OP_STAT_OP_ERR) ||
reg & BIT_ULL(NIX_CQ_OP_STAT_CQ_ERR))
return 0;
tail = reg & 0xFFFFF;
head = (reg >> 20) & 0xFFFFF;
if (tail < head)
available = tail - head + qmask + 1;
else
available = tail - head;
rxq->available = available;
}
return RTE_MIN(pkts, available);
}
static __rte_always_inline uint16_t
cn10k_nix_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts,
const uint16_t flags)
{
struct cn10k_eth_rxq *rxq = rx_queue;
const uint64_t mbuf_init = rxq->mbuf_initializer;
const void *lookup_mem = rxq->lookup_mem;
const uint64_t data_off = rxq->data_off;
const uintptr_t desc = rxq->desc;
const uint64_t wdata = rxq->wdata;
const uint32_t qmask = rxq->qmask;
uint16_t packets = 0, nb_pkts;
uint32_t head = rxq->head;
struct nix_cqe_hdr_s *cq;
struct rte_mbuf *mbuf;
nb_pkts = nix_rx_nb_pkts(rxq, wdata, pkts, qmask);
while (packets < nb_pkts) {
/* Prefetch N desc ahead */
rte_prefetch_non_temporal(
(void *)(desc + (CQE_SZ((head + 2) & qmask))));
cq = (struct nix_cqe_hdr_s *)(desc + CQE_SZ(head));
mbuf = nix_get_mbuf_from_cqe(cq, data_off);
cn10k_nix_cqe_to_mbuf(cq, cq->tag, mbuf, lookup_mem, mbuf_init,
flags);
rx_pkts[packets++] = mbuf;
roc_prefetch_store_keep(mbuf);
head++;
head &= qmask;
}
rxq->head = head;
rxq->available -= nb_pkts;
/* Free all the CQs that we've processed */
plt_write64((wdata | nb_pkts), rxq->cq_door);
return nb_pkts;
}
#if defined(RTE_ARCH_ARM64)
static __rte_always_inline uint16_t
cn10k_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 += cn10k_nix_recv_pkts(rx_queue, &rx_pkts[packets],
pkts_left, flags);
return packets;
}
#else
static inline uint16_t
cn10k_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 RSS_F NIX_RX_OFFLOAD_RSS_F
#define PTYPE_F NIX_RX_OFFLOAD_PTYPE_F
#define CKSUM_F NIX_RX_OFFLOAD_CHECKSUM_F
#define MARK_F NIX_RX_OFFLOAD_MARK_UPDATE_F
/* [MARK] [CKSUM] [PTYPE] [RSS] */
#define NIX_RX_FASTPATH_MODES \
R(no_offload, 0, 0, 0, 0, NIX_RX_OFFLOAD_NONE) \
R(rss, 0, 0, 0, 1, RSS_F) \
R(ptype, 0, 0, 1, 0, PTYPE_F) \
R(ptype_rss, 0, 0, 1, 1, PTYPE_F | RSS_F) \
R(cksum, 0, 1, 0, 0, CKSUM_F) \
R(cksum_rss, 0, 1, 0, 1, CKSUM_F | RSS_F) \
R(cksum_ptype, 0, 1, 1, 0, CKSUM_F | PTYPE_F) \
R(cksum_ptype_rss, 0, 1, 1, 1, CKSUM_F | PTYPE_F | RSS_F) \
R(mark, 1, 0, 0, 0, MARK_F) \
R(mark_rss, 1, 0, 0, 1, MARK_F | RSS_F) \
R(mark_ptype, 1, 0, 1, 0, MARK_F | PTYPE_F) \
R(mark_ptype_rss, 1, 0, 1, 1, MARK_F | PTYPE_F | RSS_F) \
R(mark_cksum, 1, 1, 0, 0, MARK_F | CKSUM_F) \
R(mark_cksum_rss, 1, 1, 0, 1, MARK_F | CKSUM_F | RSS_F) \
R(mark_cksum_ptype, 1, 1, 1, 0, MARK_F | CKSUM_F | PTYPE_F)\
R(mark_cksum_ptype_rss, 1, 1, 1, 1, MARK_F | CKSUM_F | PTYPE_F | RSS_F)
#define R(name, f3, f2, f1, f0, flags) \
uint16_t __rte_noinline __rte_hot cn10k_nix_recv_pkts_##name( \
void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts); \
\
uint16_t __rte_noinline __rte_hot cn10k_nix_recv_pkts_mseg_##name( \
void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts); \
\
uint16_t __rte_noinline __rte_hot cn10k_nix_recv_pkts_vec_##name( \
void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts);
NIX_RX_FASTPATH_MODES
#undef R
#endif /* __CN10K_RX_H__ */
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