[PATCH] net/ice: remove avx512 specific Rx queue rearm code

[Wenzhuo Lu <wenzhuo.lu@intel.com>]

'ice_rxq_rearm' in avx512 path is optimized to improve the performance.
But after the commit a2833ecc5ea4 ("mempool: fix get objects from mempool
with cache"), this avx512 specific optimization is not necessary.
This patch remove the unnecessary PMD specific optimization to make the
code easier to maintain and get the benefit from the enhancement of common
lib.

Reported-by: Haijun Chu <haijun.chu@intel.com>
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/ice/ice_rxtx_vec_avx512.c | 115 +-------------------------
 1 file changed, 1 insertion(+), 114 deletions(-)

diff --git a/drivers/net/ice/ice_rxtx_vec_avx512.c b/drivers/net/ice/ice_rxtx_vec_avx512.c
index 5bfd5152df..569d485c2c 100644
--- a/drivers/net/ice/ice_rxtx_vec_avx512.c
+++ b/drivers/net/ice/ice_rxtx_vec_avx512.c
@@ -16,120 +16,7 @@
 static __rte_always_inline void
 ice_rxq_rearm(struct ice_rx_queue *rxq)
 {
-	int i;
-	uint16_t rx_id;
-	volatile union ice_rx_flex_desc *rxdp;
-	struct ice_rx_entry *rxep = &rxq->sw_ring[rxq->rxrearm_start];
-	struct rte_mempool_cache *cache = rte_mempool_default_cache(rxq->mp,
-			rte_lcore_id());
-
-	rxdp = rxq->rx_ring + rxq->rxrearm_start;
-
-	if (unlikely(!cache))
-		return ice_rxq_rearm_common(rxq, true);
-
-	/* We need to pull 'n' more MBUFs into the software ring */
-	if (cache->len < ICE_RXQ_REARM_THRESH) {
-		uint32_t req = ICE_RXQ_REARM_THRESH + (cache->size -
-				cache->len);
-
-		int ret = rte_mempool_ops_dequeue_bulk(rxq->mp,
-				&cache->objs[cache->len], req);
-		if (ret == 0) {
-			cache->len += req;
-		} else {
-			if (rxq->rxrearm_nb + ICE_RXQ_REARM_THRESH >=
-			    rxq->nb_rx_desc) {
-				__m128i dma_addr0;
-
-				dma_addr0 = _mm_setzero_si128();
-				for (i = 0; i < ICE_DESCS_PER_LOOP; i++) {
-					rxep[i].mbuf = &rxq->fake_mbuf;
-					_mm_store_si128
-						((__m128i *)&rxdp[i].read,
-							dma_addr0);
-				}
-			}
-			rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed +=
-				ICE_RXQ_REARM_THRESH;
-			return;
-		}
-	}
-
-	const __m512i iova_offsets =  _mm512_set1_epi64
-		(offsetof(struct rte_mbuf, buf_iova));
-	const __m512i headroom = _mm512_set1_epi64(RTE_PKTMBUF_HEADROOM);
-
-#ifndef RTE_LIBRTE_ICE_16BYTE_RX_DESC
-	/* shuffle the iova into correct slots. Values 4-7 will contain
-	 * zeros, so use 7 for a zero-value.
-	 */
-	const __m512i permute_idx = _mm512_set_epi64(7, 7, 3, 1, 7, 7, 2, 0);
-#else
-	const __m512i permute_idx = _mm512_set_epi64(7, 3, 6, 2, 5, 1, 4, 0);
-#endif
-
-	/* fill up the rxd in vector, process 8 mbufs in one loop */
-	for (i = 0; i < ICE_RXQ_REARM_THRESH / 8; i++) {
-		const __m512i mbuf_ptrs = _mm512_loadu_si512
-			(&cache->objs[cache->len - 8]);
-		_mm512_store_si512(rxep, mbuf_ptrs);
-
-		/* gather iova of mbuf0-7 into one zmm reg */
-		const __m512i iova_base_addrs = _mm512_i64gather_epi64
-			(_mm512_add_epi64(mbuf_ptrs, iova_offsets),
-				0, /* base */
-				1  /* scale */);
-		const __m512i iova_addrs = _mm512_add_epi64(iova_base_addrs,
-				headroom);
-#ifndef RTE_LIBRTE_ICE_16BYTE_RX_DESC
-		const __m512i iovas0 = _mm512_castsi256_si512
-			(_mm512_extracti64x4_epi64(iova_addrs, 0));
-		const __m512i iovas1 = _mm512_castsi256_si512
-			(_mm512_extracti64x4_epi64(iova_addrs, 1));
-
-		/* permute leaves iova 2-3 in hdr_addr of desc 0-1
-		 * but these are ignored by driver since header split not
-		 * enabled. Similarly for desc 4 & 5.
-		 */
-		const __m512i desc0_1 = _mm512_permutexvar_epi64
-			(permute_idx, iovas0);
-		const __m512i desc2_3 = _mm512_bsrli_epi128(desc0_1, 8);
-
-		const __m512i desc4_5 = _mm512_permutexvar_epi64
-			(permute_idx, iovas1);
-		const __m512i desc6_7 = _mm512_bsrli_epi128(desc4_5, 8);
-
-		_mm512_store_si512((void *)rxdp, desc0_1);
-		_mm512_store_si512((void *)(rxdp + 2), desc2_3);
-		_mm512_store_si512((void *)(rxdp + 4), desc4_5);
-		_mm512_store_si512((void *)(rxdp + 6), desc6_7);
-#else
-		/* permute leaves iova 4-7 in hdr_addr of desc 0-3
-		 * but these are ignored by driver since header split not
-		 * enabled.
-		 */
-		const __m512i desc0_3 = _mm512_permutexvar_epi64
-			(permute_idx, iova_addrs);
-		const __m512i desc4_7 = _mm512_bsrli_epi128(desc0_3, 8);
-
-		_mm512_store_si512((void *)rxdp, desc0_3);
-		_mm512_store_si512((void *)(rxdp + 4), desc4_7);
-#endif
-		rxep += 8, rxdp += 8, cache->len -= 8;
-	}
-
-	rxq->rxrearm_start += ICE_RXQ_REARM_THRESH;
-	if (rxq->rxrearm_start >= rxq->nb_rx_desc)
-		rxq->rxrearm_start = 0;
-
-	rxq->rxrearm_nb -= ICE_RXQ_REARM_THRESH;
-
-	rx_id = (uint16_t)((rxq->rxrearm_start == 0) ?
-			     (rxq->nb_rx_desc - 1) : (rxq->rxrearm_start - 1));
-
-	/* Update the tail pointer on the NIC */
-	ICE_PCI_REG_WC_WRITE(rxq->qrx_tail, rx_id);
+	ice_rxq_rearm_common(rxq, true);
 }
 
 static inline __m256i
-- 
2.25.1