drivers/net: fix exposing internal headers
[dpdk.git] / drivers / net / iavf / iavf_rxtx_vec_common.h
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright(c) 2017 Intel Corporation
3  */
4
5 #ifndef _IAVF_RXTX_VEC_COMMON_H_
6 #define _IAVF_RXTX_VEC_COMMON_H_
7 #include <stdint.h>
8 #include <rte_ethdev_driver.h>
9 #include <rte_malloc.h>
10
11 #include "iavf.h"
12 #include "iavf_rxtx.h"
13
14 static inline uint16_t
15 reassemble_packets(struct iavf_rx_queue *rxq, struct rte_mbuf **rx_bufs,
16                    uint16_t nb_bufs, uint8_t *split_flags)
17 {
18         struct rte_mbuf *pkts[IAVF_VPMD_RX_MAX_BURST];
19         struct rte_mbuf *start = rxq->pkt_first_seg;
20         struct rte_mbuf *end =  rxq->pkt_last_seg;
21         unsigned int pkt_idx, buf_idx;
22
23         for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) {
24                 if (end) {
25                         /* processing a split packet */
26                         end->next = rx_bufs[buf_idx];
27                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
28
29                         start->nb_segs++;
30                         start->pkt_len += rx_bufs[buf_idx]->data_len;
31                         end = end->next;
32
33                         if (!split_flags[buf_idx]) {
34                                 /* it's the last packet of the set */
35                                 start->hash = end->hash;
36                                 start->vlan_tci = end->vlan_tci;
37                                 start->ol_flags = end->ol_flags;
38                                 /* we need to strip crc for the whole packet */
39                                 start->pkt_len -= rxq->crc_len;
40                                 if (end->data_len > rxq->crc_len) {
41                                         end->data_len -= rxq->crc_len;
42                                 } else {
43                                         /* free up last mbuf */
44                                         struct rte_mbuf *secondlast = start;
45
46                                         start->nb_segs--;
47                                         while (secondlast->next != end)
48                                                 secondlast = secondlast->next;
49                                         secondlast->data_len -= (rxq->crc_len -
50                                                         end->data_len);
51                                         secondlast->next = NULL;
52                                         rte_pktmbuf_free_seg(end);
53                                 }
54                                 pkts[pkt_idx++] = start;
55                                 start = NULL;
56                                 end = NULL;
57                         }
58                 } else {
59                         /* not processing a split packet */
60                         if (!split_flags[buf_idx]) {
61                                 /* not a split packet, save and skip */
62                                 pkts[pkt_idx++] = rx_bufs[buf_idx];
63                                 continue;
64                         }
65                         end = start = rx_bufs[buf_idx];
66                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
67                         rx_bufs[buf_idx]->pkt_len += rxq->crc_len;
68                 }
69         }
70
71         /* save the partial packet for next time */
72         rxq->pkt_first_seg = start;
73         rxq->pkt_last_seg = end;
74         memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts)));
75         return pkt_idx;
76 }
77
78 static __rte_always_inline int
79 iavf_tx_free_bufs(struct iavf_tx_queue *txq)
80 {
81         struct iavf_tx_entry *txep;
82         uint32_t n;
83         uint32_t i;
84         int nb_free = 0;
85         struct rte_mbuf *m, *free[IAVF_VPMD_TX_MAX_FREE_BUF];
86
87         /* check DD bits on threshold descriptor */
88         if ((txq->tx_ring[txq->next_dd].cmd_type_offset_bsz &
89                         rte_cpu_to_le_64(IAVF_TXD_QW1_DTYPE_MASK)) !=
90                         rte_cpu_to_le_64(IAVF_TX_DESC_DTYPE_DESC_DONE))
91                 return 0;
92
93         n = txq->rs_thresh;
94
95          /* first buffer to free from S/W ring is at index
96           * tx_next_dd - (tx_rs_thresh-1)
97           */
98         txep = &txq->sw_ring[txq->next_dd - (n - 1)];
99         m = rte_pktmbuf_prefree_seg(txep[0].mbuf);
100         if (likely(m != NULL)) {
101                 free[0] = m;
102                 nb_free = 1;
103                 for (i = 1; i < n; i++) {
104                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
105                         if (likely(m != NULL)) {
106                                 if (likely(m->pool == free[0]->pool)) {
107                                         free[nb_free++] = m;
108                                 } else {
109                                         rte_mempool_put_bulk(free[0]->pool,
110                                                              (void *)free,
111                                                              nb_free);
112                                         free[0] = m;
113                                         nb_free = 1;
114                                 }
115                         }
116                 }
117                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
118         } else {
119                 for (i = 1; i < n; i++) {
120                         m = rte_pktmbuf_prefree_seg(txep[i].mbuf);
121                         if (m)
122                                 rte_mempool_put(m->pool, m);
123                 }
124         }
125
126         /* buffers were freed, update counters */
127         txq->nb_free = (uint16_t)(txq->nb_free + txq->rs_thresh);
128         txq->next_dd = (uint16_t)(txq->next_dd + txq->rs_thresh);
129         if (txq->next_dd >= txq->nb_tx_desc)
130                 txq->next_dd = (uint16_t)(txq->rs_thresh - 1);
131
132         return txq->rs_thresh;
133 }
134
135 static __rte_always_inline void
136 tx_backlog_entry(struct iavf_tx_entry *txep,
137                  struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
138 {
139         int i;
140
141         for (i = 0; i < (int)nb_pkts; ++i)
142                 txep[i].mbuf = tx_pkts[i];
143 }
144
145 static inline void
146 _iavf_rx_queue_release_mbufs_vec(struct iavf_rx_queue *rxq)
147 {
148         const unsigned int mask = rxq->nb_rx_desc - 1;
149         unsigned int i;
150
151         if (!rxq->sw_ring || rxq->rxrearm_nb >= rxq->nb_rx_desc)
152                 return;
153
154         /* free all mbufs that are valid in the ring */
155         if (rxq->rxrearm_nb == 0) {
156                 for (i = 0; i < rxq->nb_rx_desc; i++) {
157                         if (rxq->sw_ring[i])
158                                 rte_pktmbuf_free_seg(rxq->sw_ring[i]);
159                 }
160         } else {
161                 for (i = rxq->rx_tail;
162                      i != rxq->rxrearm_start;
163                      i = (i + 1) & mask) {
164                         if (rxq->sw_ring[i])
165                                 rte_pktmbuf_free_seg(rxq->sw_ring[i]);
166                 }
167         }
168
169         rxq->rxrearm_nb = rxq->nb_rx_desc;
170
171         /* set all entries to NULL */
172         memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_rx_desc);
173 }
174
175 static inline void
176 _iavf_tx_queue_release_mbufs_vec(struct iavf_tx_queue *txq)
177 {
178         unsigned i;
179         const uint16_t max_desc = (uint16_t)(txq->nb_tx_desc - 1);
180
181         if (!txq->sw_ring || txq->nb_free == max_desc)
182                 return;
183
184         i = txq->next_dd - txq->rs_thresh + 1;
185         if (txq->tx_tail < i) {
186                 for (; i < txq->nb_tx_desc; i++) {
187                         rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
188                         txq->sw_ring[i].mbuf = NULL;
189                 }
190                 i = 0;
191         }
192 }
193
194 static inline int
195 iavf_rxq_vec_setup_default(struct iavf_rx_queue *rxq)
196 {
197         uintptr_t p;
198         struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */
199
200         mb_def.nb_segs = 1;
201         mb_def.data_off = RTE_PKTMBUF_HEADROOM;
202         mb_def.port = rxq->port_id;
203         rte_mbuf_refcnt_set(&mb_def, 1);
204
205         /* prevent compiler reordering: rearm_data covers previous fields */
206         rte_compiler_barrier();
207         p = (uintptr_t)&mb_def.rearm_data;
208         rxq->mbuf_initializer = *(uint64_t *)p;
209         return 0;
210 }
211
212 static inline int
213 iavf_rx_vec_queue_default(struct iavf_rx_queue *rxq)
214 {
215         if (!rxq)
216                 return -1;
217
218         if (!rte_is_power_of_2(rxq->nb_rx_desc))
219                 return -1;
220
221         if (rxq->rx_free_thresh < IAVF_VPMD_RX_MAX_BURST)
222                 return -1;
223
224         if (rxq->nb_rx_desc % rxq->rx_free_thresh)
225                 return -1;
226
227         return 0;
228 }
229
230 static inline int
231 iavf_tx_vec_queue_default(struct iavf_tx_queue *txq)
232 {
233         if (!txq)
234                 return -1;
235
236         if (txq->offloads & IAVF_NO_VECTOR_FLAGS)
237                 return -1;
238
239         if (txq->rs_thresh < IAVF_VPMD_TX_MAX_BURST ||
240             txq->rs_thresh > IAVF_VPMD_TX_MAX_FREE_BUF)
241                 return -1;
242
243         return 0;
244 }
245
246 static inline int
247 iavf_rx_vec_dev_check_default(struct rte_eth_dev *dev)
248 {
249         int i;
250         struct iavf_rx_queue *rxq;
251
252         for (i = 0; i < dev->data->nb_rx_queues; i++) {
253                 rxq = dev->data->rx_queues[i];
254                 if (iavf_rx_vec_queue_default(rxq))
255                         return -1;
256         }
257
258         return 0;
259 }
260
261 static inline int
262 iavf_tx_vec_dev_check_default(struct rte_eth_dev *dev)
263 {
264         int i;
265         struct iavf_tx_queue *txq;
266
267         for (i = 0; i < dev->data->nb_tx_queues; i++) {
268                 txq = dev->data->tx_queues[i];
269                 if (iavf_tx_vec_queue_default(txq))
270                         return -1;
271         }
272
273         return 0;
274 }
275
276 #endif