Imported Upstream version 16.11.1
[deb_dpdk.git] / drivers / net / i40e / i40e_rxtx_vec_common.h
1 /*-
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32  */
33
34 #ifndef _I40E_RXTX_VEC_COMMON_H_
35 #define _I40E_RXTX_VEC_COMMON_H_
36 #include <stdint.h>
37 #include <rte_ethdev.h>
38 #include <rte_malloc.h>
39
40 #include "i40e_ethdev.h"
41 #include "i40e_rxtx.h"
42
43 static inline uint16_t
44 reassemble_packets(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_bufs,
45                    uint16_t nb_bufs, uint8_t *split_flags)
46 {
47         struct rte_mbuf *pkts[RTE_I40E_VPMD_RX_BURST]; /*finished pkts*/
48         struct rte_mbuf *start = rxq->pkt_first_seg;
49         struct rte_mbuf *end =  rxq->pkt_last_seg;
50         unsigned pkt_idx, buf_idx;
51
52         for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) {
53                 if (end != NULL) {
54                         /* processing a split packet */
55                         end->next = rx_bufs[buf_idx];
56                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
57
58                         start->nb_segs++;
59                         start->pkt_len += rx_bufs[buf_idx]->data_len;
60                         end = end->next;
61
62                         if (!split_flags[buf_idx]) {
63                                 /* it's the last packet of the set */
64                                 start->hash = end->hash;
65                                 start->ol_flags = end->ol_flags;
66                                 /* we need to strip crc for the whole packet */
67                                 start->pkt_len -= rxq->crc_len;
68                                 if (end->data_len > rxq->crc_len) {
69                                         end->data_len -= rxq->crc_len;
70                                 } else {
71                                         /* free up last mbuf */
72                                         struct rte_mbuf *secondlast = start;
73
74                                         start->nb_segs--;
75                                         while (secondlast->next != end)
76                                                 secondlast = secondlast->next;
77                                         secondlast->data_len -= (rxq->crc_len -
78                                                         end->data_len);
79                                         secondlast->next = NULL;
80                                         rte_pktmbuf_free_seg(end);
81                                         end = secondlast;
82                                 }
83                                 pkts[pkt_idx++] = start;
84                                 start = end = NULL;
85                         }
86                 } else {
87                         /* not processing a split packet */
88                         if (!split_flags[buf_idx]) {
89                                 /* not a split packet, save and skip */
90                                 pkts[pkt_idx++] = rx_bufs[buf_idx];
91                                 continue;
92                         }
93                         end = start = rx_bufs[buf_idx];
94                         rx_bufs[buf_idx]->data_len += rxq->crc_len;
95                         rx_bufs[buf_idx]->pkt_len += rxq->crc_len;
96                 }
97         }
98
99         /* save the partial packet for next time */
100         rxq->pkt_first_seg = start;
101         rxq->pkt_last_seg = end;
102         memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts)));
103         return pkt_idx;
104 }
105
106 static inline int __attribute__((always_inline))
107 i40e_tx_free_bufs(struct i40e_tx_queue *txq)
108 {
109         struct i40e_tx_entry *txep;
110         uint32_t n;
111         uint32_t i;
112         int nb_free = 0;
113         struct rte_mbuf *m, *free[RTE_I40E_TX_MAX_FREE_BUF_SZ];
114
115         /* check DD bits on threshold descriptor */
116         if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
117                         rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) !=
118                         rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE))
119                 return 0;
120
121         n = txq->tx_rs_thresh;
122
123          /* first buffer to free from S/W ring is at index
124           * tx_next_dd - (tx_rs_thresh-1)
125           */
126         txep = &txq->sw_ring[txq->tx_next_dd - (n - 1)];
127         m = __rte_pktmbuf_prefree_seg(txep[0].mbuf);
128         if (likely(m != NULL)) {
129                 free[0] = m;
130                 nb_free = 1;
131                 for (i = 1; i < n; i++) {
132                         m = __rte_pktmbuf_prefree_seg(txep[i].mbuf);
133                         if (likely(m != NULL)) {
134                                 if (likely(m->pool == free[0]->pool)) {
135                                         free[nb_free++] = m;
136                                 } else {
137                                         rte_mempool_put_bulk(free[0]->pool,
138                                                              (void *)free,
139                                                              nb_free);
140                                         free[0] = m;
141                                         nb_free = 1;
142                                 }
143                         }
144                 }
145                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
146         } else {
147                 for (i = 1; i < n; i++) {
148                         m = __rte_pktmbuf_prefree_seg(txep[i].mbuf);
149                         if (m != NULL)
150                                 rte_mempool_put(m->pool, m);
151                 }
152         }
153
154         /* buffers were freed, update counters */
155         txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh);
156         txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh);
157         if (txq->tx_next_dd >= txq->nb_tx_desc)
158                 txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);
159
160         return txq->tx_rs_thresh;
161 }
162
163 static inline void __attribute__((always_inline))
164 tx_backlog_entry(struct i40e_tx_entry *txep,
165                  struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
166 {
167         int i;
168
169         for (i = 0; i < (int)nb_pkts; ++i)
170                 txep[i].mbuf = tx_pkts[i];
171 }
172
173 static inline void
174 _i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue *rxq)
175 {
176         const unsigned mask = rxq->nb_rx_desc - 1;
177         unsigned i;
178
179         if (rxq->sw_ring == NULL || rxq->rxrearm_nb >= rxq->nb_rx_desc)
180                 return;
181
182         /* free all mbufs that are valid in the ring */
183         if (rxq->rxrearm_nb == 0) {
184                 for (i = 0; i < rxq->nb_rx_desc; i++) {
185                         if (rxq->sw_ring[i].mbuf != NULL)
186                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
187                 }
188         } else {
189                 for (i = rxq->rx_tail;
190                      i != rxq->rxrearm_start;
191                      i = (i + 1) & mask) {
192                         if (rxq->sw_ring[i].mbuf != NULL)
193                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
194                 }
195         }
196
197         rxq->rxrearm_nb = rxq->nb_rx_desc;
198
199         /* set all entries to NULL */
200         memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_rx_desc);
201 }
202
203 static inline int
204 i40e_rxq_vec_setup_default(struct i40e_rx_queue *rxq)
205 {
206         uintptr_t p;
207         struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */
208
209         mb_def.nb_segs = 1;
210         mb_def.data_off = RTE_PKTMBUF_HEADROOM;
211         mb_def.port = rxq->port_id;
212         rte_mbuf_refcnt_set(&mb_def, 1);
213
214         /* prevent compiler reordering: rearm_data covers previous fields */
215         rte_compiler_barrier();
216         p = (uintptr_t)&mb_def.rearm_data;
217         rxq->mbuf_initializer = *(uint64_t *)p;
218         return 0;
219 }
220
221 static inline int
222 i40e_rx_vec_dev_conf_condition_check_default(struct rte_eth_dev *dev)
223 {
224 #ifndef RTE_LIBRTE_IEEE1588
225         struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
226         struct rte_fdir_conf *fconf = &dev->data->dev_conf.fdir_conf;
227
228 #ifndef RTE_LIBRTE_I40E_RX_OLFLAGS_ENABLE
229         /* whithout rx ol_flags, no VP flag report */
230         if (rxmode->hw_vlan_strip != 0 ||
231             rxmode->hw_vlan_extend != 0 ||
232             rxmode->hw_ip_checksum != 0)
233                 return -1;
234 #endif
235
236         /* no fdir support */
237         if (fconf->mode != RTE_FDIR_MODE_NONE)
238                 return -1;
239
240          /* - no csum error report support
241          * - no header split support
242          */
243         if (rxmode->header_split == 1)
244                 return -1;
245
246         return 0;
247 #else
248         RTE_SET_USED(dev);
249         return -1;
250 #endif
251 }
252 #endif