summaryrefslogtreecommitdiff
path: root/drivers/net/ice/ice_rxtx_vec_common.h
blob: 5e6f89642ae0c59126b1b246c9e8819cb4d65f50 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2019 Intel Corporation
 */

#ifndef _ICE_RXTX_VEC_COMMON_H_
#define _ICE_RXTX_VEC_COMMON_H_

#include "ice_rxtx.h"

static inline uint16_t
ice_rx_reassemble_packets(struct ice_rx_queue *rxq, struct rte_mbuf **rx_bufs,
			  uint16_t nb_bufs, uint8_t *split_flags)
{
	struct rte_mbuf *pkts[ICE_VPMD_RX_BURST] = {0}; /*finished pkts*/
	struct rte_mbuf *start = rxq->pkt_first_seg;
	struct rte_mbuf *end =  rxq->pkt_last_seg;
	unsigned int pkt_idx, buf_idx;

	for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) {
		if (end) {
			/* processing a split packet */
			end->next = rx_bufs[buf_idx];
			rx_bufs[buf_idx]->data_len += rxq->crc_len;

			start->nb_segs++;
			start->pkt_len += rx_bufs[buf_idx]->data_len;
			end = end->next;

			if (!split_flags[buf_idx]) {
				/* it's the last packet of the set */
				start->hash = end->hash;
				start->ol_flags = end->ol_flags;
				/* we need to strip crc for the whole packet */
				start->pkt_len -= rxq->crc_len;
				if (end->data_len > rxq->crc_len) {
					end->data_len -= rxq->crc_len;
				} else {
					/* free up last mbuf */
					struct rte_mbuf *secondlast = start;

					start->nb_segs--;
					while (secondlast->next != end)
						secondlast = secondlast->next;
					secondlast->data_len -= (rxq->crc_len -
							end->data_len);
					secondlast->next = NULL;
					rte_pktmbuf_free_seg(end);
				}
				pkts[pkt_idx++] = start;
				start = NULL;
				end = NULL;
			}
		} else {
			/* not processing a split packet */
			if (!split_flags[buf_idx]) {
				/* not a split packet, save and skip */
				pkts[pkt_idx++] = rx_bufs[buf_idx];
				continue;
			}
			start = rx_bufs[buf_idx];
			end = start;
			rx_bufs[buf_idx]->data_len += rxq->crc_len;
			rx_bufs[buf_idx]->pkt_len += rxq->crc_len;
		}
	}

	/* save the partial packet for next time */
	rxq->pkt_first_seg = start;
	rxq->pkt_last_seg = end;
	rte_memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts)));
	return pkt_idx;
}

static __rte_always_inline int
ice_tx_free_bufs(struct ice_tx_queue *txq)
{
	struct ice_tx_entry *txep;
	uint32_t n;
	uint32_t i;
	int nb_free = 0;
	struct rte_mbuf *m, *free[ICE_TX_MAX_FREE_BUF_SZ];

	/* check DD bits on threshold descriptor */
	if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
			rte_cpu_to_le_64(ICE_TXD_QW1_DTYPE_M)) !=
			rte_cpu_to_le_64(ICE_TX_DESC_DTYPE_DESC_DONE))
		return 0;

	n = txq->tx_rs_thresh;

	 /* first buffer to free from S/W ring is at index
	  * tx_next_dd - (tx_rs_thresh-1)
	  */
	txep = &txq->sw_ring[txq->tx_next_dd - (n - 1)];
	m = rte_pktmbuf_prefree_seg(txep[0].mbuf);
	if (likely(m)) {
		free[0] = m;
		nb_free = 1;
		for (i = 1; i < n; i++) {
			m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
			if (likely(m)) {
				if (likely(m->pool == free[0]->pool)) {
					free[nb_free++] = m;
				} else {
					rte_mempool_put_bulk(free[0]->pool,
							     (void *)free,
							     nb_free);
					free[0] = m;
					nb_free = 1;
				}
			}
		}
		rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
	} else {
		for (i = 1; i < n; i++) {
			m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
			if (m)
				rte_mempool_put(m->pool, m);
		}
	}

	/* buffers were freed, update counters */
	txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh);
	txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh);
	if (txq->tx_next_dd >= txq->nb_tx_desc)
		txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);

	return txq->tx_rs_thresh;
}

static __rte_always_inline void
ice_tx_backlog_entry(struct ice_tx_entry *txep,
		     struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
{
	int i;

	for (i = 0; i < (int)nb_pkts; ++i)
		txep[i].mbuf = tx_pkts[i];
}

static inline void
_ice_rx_queue_release_mbufs_vec(struct ice_rx_queue *rxq)
{
	const unsigned int mask = rxq->nb_rx_desc - 1;
	unsigned int i;

	if (unlikely(!rxq->sw_ring)) {
		PMD_DRV_LOG(DEBUG, "sw_ring is NULL");
		return;
	}

	if (rxq->rxrearm_nb >= rxq->nb_rx_desc)
		return;

	/* free all mbufs that are valid in the ring */
	if (rxq->rxrearm_nb == 0) {
		for (i = 0; i < rxq->nb_rx_desc; i++) {
			if (rxq->sw_ring[i].mbuf)
				rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
		}
	} else {
		for (i = rxq->rx_tail;
		     i != rxq->rxrearm_start;
		     i = (i + 1) & mask) {
			if (rxq->sw_ring[i].mbuf)
				rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
		}
	}

	rxq->rxrearm_nb = rxq->nb_rx_desc;

	/* set all entries to NULL */
	memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_rx_desc);
}

static inline void
_ice_tx_queue_release_mbufs_vec(struct ice_tx_queue *txq)
{
	uint16_t i;

	if (unlikely(!txq || !txq->sw_ring)) {
		PMD_DRV_LOG(DEBUG, "Pointer to rxq or sw_ring is NULL");
		return;
	}

	/**
	 *  vPMD tx will not set sw_ring's mbuf to NULL after free,
	 *  so need to free remains more carefully.
	 */
	i = txq->tx_next_dd - txq->tx_rs_thresh + 1;
	if (txq->tx_tail < i) {
		for (; i < txq->nb_tx_desc; i++) {
			rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
			txq->sw_ring[i].mbuf = NULL;
		}
		i = 0;
	}
	for (; i < txq->tx_tail; i++) {
		rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
		txq->sw_ring[i].mbuf = NULL;
	}
}

static inline int
ice_rxq_vec_setup_default(struct ice_rx_queue *rxq)
{
	uintptr_t p;
	struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */

	mb_def.nb_segs = 1;
	mb_def.data_off = RTE_PKTMBUF_HEADROOM;
	mb_def.port = rxq->port_id;
	rte_mbuf_refcnt_set(&mb_def, 1);

	/* prevent compiler reordering: rearm_data covers previous fields */
	rte_compiler_barrier();
	p = (uintptr_t)&mb_def.rearm_data;
	rxq->mbuf_initializer = *(uint64_t *)p;
	return 0;
}

static inline int
ice_rx_vec_queue_default(struct ice_rx_queue *rxq)
{
	if (!rxq)
		return -1;

	if (!rte_is_power_of_2(rxq->nb_rx_desc))
		return -1;

	if (rxq->rx_free_thresh < ICE_VPMD_RX_BURST)
		return -1;

	if (rxq->nb_rx_desc % rxq->rx_free_thresh)
		return -1;

	if (rxq->proto_xtr != PROTO_XTR_NONE)
		return -1;

	return 0;
}

#define ICE_NO_VECTOR_FLAGS (				 \
		DEV_TX_OFFLOAD_MULTI_SEGS |		 \
		DEV_TX_OFFLOAD_VLAN_INSERT |		 \
		DEV_TX_OFFLOAD_SCTP_CKSUM |		 \
		DEV_TX_OFFLOAD_UDP_CKSUM |		 \
		DEV_TX_OFFLOAD_TCP_CKSUM)

static inline int
ice_tx_vec_queue_default(struct ice_tx_queue *txq)
{
	if (!txq)
		return -1;

	if (txq->offloads & ICE_NO_VECTOR_FLAGS)
		return -1;

	if (txq->tx_rs_thresh < ICE_VPMD_TX_BURST ||
	    txq->tx_rs_thresh > ICE_TX_MAX_FREE_BUF_SZ)
		return -1;

	return 0;
}

static inline int
ice_rx_vec_dev_check_default(struct rte_eth_dev *dev)
{
	int i;
	struct ice_rx_queue *rxq;
	struct ice_adapter *ad =
		ICE_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);

	/* vPMD does not support flow mark. */
	if (ad->devargs.flow_mark_support)
		return -1;

	for (i = 0; i < dev->data->nb_rx_queues; i++) {
		rxq = dev->data->rx_queues[i];
		if (ice_rx_vec_queue_default(rxq))
			return -1;
	}

	return 0;
}

static inline int
ice_tx_vec_dev_check_default(struct rte_eth_dev *dev)
{
	int i;
	struct ice_tx_queue *txq;

	for (i = 0; i < dev->data->nb_tx_queues; i++) {
		txq = dev->data->tx_queues[i];
		if (ice_tx_vec_queue_default(txq))
			return -1;
	}

	return 0;
}

#endif