1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2014-2018 Broadcom
8 #include <rte_byteorder.h>
9 #include <rte_malloc.h>
13 #include "bnxt_ring.h"
16 #include "hsi_struct_def_dpdk.h"
23 void bnxt_free_tx_rings(struct bnxt *bp)
27 for (i = 0; i < (int)bp->tx_nr_rings; i++) {
28 struct bnxt_tx_queue *txq = bp->tx_queues[i];
33 bnxt_free_ring(txq->tx_ring->tx_ring_struct);
34 rte_free(txq->tx_ring->tx_ring_struct);
35 rte_free(txq->tx_ring);
37 bnxt_free_ring(txq->cp_ring->cp_ring_struct);
38 rte_free(txq->cp_ring->cp_ring_struct);
39 rte_free(txq->cp_ring);
42 bp->tx_queues[i] = NULL;
46 int bnxt_init_one_tx_ring(struct bnxt_tx_queue *txq)
48 struct bnxt_tx_ring_info *txr = txq->tx_ring;
49 struct bnxt_ring *ring = txr->tx_ring_struct;
51 txq->tx_wake_thresh = ring->ring_size / 2;
52 ring->fw_ring_id = INVALID_HW_RING_ID;
57 int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id)
59 struct bnxt_cp_ring_info *cpr;
60 struct bnxt_tx_ring_info *txr;
61 struct bnxt_ring *ring;
63 txr = rte_zmalloc_socket("bnxt_tx_ring",
64 sizeof(struct bnxt_tx_ring_info),
65 RTE_CACHE_LINE_SIZE, socket_id);
70 ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
71 sizeof(struct bnxt_ring),
72 RTE_CACHE_LINE_SIZE, socket_id);
75 txr->tx_ring_struct = ring;
76 ring->ring_size = rte_align32pow2(txq->nb_tx_desc);
77 ring->ring_mask = ring->ring_size - 1;
78 ring->bd = (void *)txr->tx_desc_ring;
79 ring->bd_dma = txr->tx_desc_mapping;
80 ring->vmem_size = ring->ring_size * sizeof(struct bnxt_sw_tx_bd);
81 ring->vmem = (void **)&txr->tx_buf_ring;
83 cpr = rte_zmalloc_socket("bnxt_tx_ring",
84 sizeof(struct bnxt_cp_ring_info),
85 RTE_CACHE_LINE_SIZE, socket_id);
90 ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
91 sizeof(struct bnxt_ring),
92 RTE_CACHE_LINE_SIZE, socket_id);
95 cpr->cp_ring_struct = ring;
96 ring->ring_size = txr->tx_ring_struct->ring_size;
97 ring->ring_mask = ring->ring_size - 1;
98 ring->bd = (void *)cpr->cp_desc_ring;
99 ring->bd_dma = cpr->cp_desc_mapping;
106 static uint16_t bnxt_start_xmit(struct rte_mbuf *tx_pkt,
107 struct bnxt_tx_queue *txq,
109 struct tx_bd_long **last_txbd)
111 struct bnxt_tx_ring_info *txr = txq->tx_ring;
112 struct tx_bd_long *txbd;
113 struct tx_bd_long_hi *txbd1 = NULL;
114 uint32_t vlan_tag_flags, cfa_action;
115 bool long_bd = false;
116 unsigned short nr_bds = 0;
117 struct rte_mbuf *m_seg;
118 struct bnxt_sw_tx_bd *tx_buf;
119 static const uint32_t lhint_arr[4] = {
120 TX_BD_LONG_FLAGS_LHINT_LT512,
121 TX_BD_LONG_FLAGS_LHINT_LT1K,
122 TX_BD_LONG_FLAGS_LHINT_LT2K,
123 TX_BD_LONG_FLAGS_LHINT_LT2K
126 if (tx_pkt->ol_flags & (PKT_TX_TCP_SEG | PKT_TX_TCP_CKSUM |
127 PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM |
128 PKT_TX_VLAN_PKT | PKT_TX_OUTER_IP_CKSUM |
129 PKT_TX_TUNNEL_GRE | PKT_TX_TUNNEL_VXLAN |
130 PKT_TX_TUNNEL_GENEVE))
133 nr_bds = long_bd + tx_pkt->nb_segs;
134 if (unlikely(bnxt_tx_avail(txq) < nr_bds))
137 /* Check if number of Tx descriptors is above HW limit */
138 if (unlikely(nr_bds > BNXT_MAX_TSO_SEGS)) {
140 "Num descriptors %d exceeds HW limit\n", nr_bds);
144 /* If packet length is less than minimum packet size, pad it */
145 if (unlikely(rte_pktmbuf_pkt_len(tx_pkt) < BNXT_MIN_PKT_SIZE)) {
146 uint8_t pad = BNXT_MIN_PKT_SIZE - rte_pktmbuf_pkt_len(tx_pkt);
147 char *seg = rte_pktmbuf_append(tx_pkt, pad);
151 "Failed to pad mbuf by %d bytes\n",
156 /* Note: data_len, pkt len are updated in rte_pktmbuf_append */
160 /* Check non zero data_len */
161 RTE_VERIFY(tx_pkt->data_len);
163 tx_buf = &txr->tx_buf_ring[txr->tx_prod];
164 tx_buf->mbuf = tx_pkt;
165 tx_buf->nr_bds = nr_bds;
167 txbd = &txr->tx_desc_ring[txr->tx_prod];
168 txbd->opaque = *coal_pkts;
169 txbd->flags_type = nr_bds << TX_BD_LONG_FLAGS_BD_CNT_SFT;
170 txbd->flags_type |= TX_BD_SHORT_FLAGS_COAL_NOW;
171 txbd->flags_type |= TX_BD_LONG_FLAGS_NO_CMPL;
172 txbd->len = tx_pkt->data_len;
173 if (tx_pkt->pkt_len >= 2014)
174 txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K;
176 txbd->flags_type |= lhint_arr[tx_pkt->pkt_len >> 9];
177 txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(tx_buf->mbuf));
181 txbd->flags_type |= TX_BD_LONG_TYPE_TX_BD_LONG;
184 if (tx_buf->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
185 /* shurd: Should this mask at
186 * TX_BD_LONG_CFA_META_VLAN_VID_MASK?
188 vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG |
189 tx_buf->mbuf->vlan_tci;
190 /* Currently supports 8021Q, 8021AD vlan offloads
191 * QINQ1, QINQ2, QINQ3 vlan headers are deprecated
193 /* DPDK only supports 802.11q VLAN packets */
195 TX_BD_LONG_CFA_META_VLAN_TPID_TPID8100;
198 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
200 txbd1 = (struct tx_bd_long_hi *)
201 &txr->tx_desc_ring[txr->tx_prod];
203 txbd1->cfa_meta = vlan_tag_flags;
204 txbd1->cfa_action = cfa_action;
206 if (tx_pkt->ol_flags & PKT_TX_TCP_SEG) {
210 txbd1->lflags |= TX_BD_LONG_LFLAGS_LSO |
211 TX_BD_LONG_LFLAGS_T_IPID;
212 hdr_size = tx_pkt->l2_len + tx_pkt->l3_len +
213 tx_pkt->l4_len + tx_pkt->outer_l2_len +
214 tx_pkt->outer_l3_len;
215 /* The hdr_size is multiple of 16bit units not 8bit.
218 txbd1->hdr_size = hdr_size >> 1;
219 txbd1->mss = tx_pkt->tso_segsz;
220 RTE_VERIFY(txbd1->mss);
222 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_UDP_CKSUM) ==
223 PKT_TX_OIP_IIP_TCP_UDP_CKSUM) {
224 /* Outer IP, Inner IP, Inner TCP/UDP CSO */
225 txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
227 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_CKSUM) ==
228 PKT_TX_OIP_IIP_TCP_CKSUM) {
229 /* Outer IP, Inner IP, Inner TCP/UDP CSO */
230 txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
232 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_UDP_CKSUM) ==
233 PKT_TX_OIP_IIP_UDP_CKSUM) {
234 /* Outer IP, Inner IP, Inner TCP/UDP CSO */
235 txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
237 } else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_UDP_CKSUM) ==
238 PKT_TX_IIP_TCP_UDP_CKSUM) {
239 /* (Inner) IP, (Inner) TCP/UDP CSO */
240 txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
242 } else if ((tx_pkt->ol_flags & PKT_TX_IIP_UDP_CKSUM) ==
243 PKT_TX_IIP_UDP_CKSUM) {
244 /* (Inner) IP, (Inner) TCP/UDP CSO */
245 txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
247 } else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_CKSUM) ==
248 PKT_TX_IIP_TCP_CKSUM) {
249 /* (Inner) IP, (Inner) TCP/UDP CSO */
250 txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
252 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_UDP_CKSUM) ==
253 PKT_TX_OIP_TCP_UDP_CKSUM) {
254 /* Outer IP, (Inner) TCP/UDP CSO */
255 txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
257 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_UDP_CKSUM) ==
258 PKT_TX_OIP_UDP_CKSUM) {
259 /* Outer IP, (Inner) TCP/UDP CSO */
260 txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
262 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_CKSUM) ==
263 PKT_TX_OIP_TCP_CKSUM) {
264 /* Outer IP, (Inner) TCP/UDP CSO */
265 txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
267 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_CKSUM) ==
268 PKT_TX_OIP_IIP_CKSUM) {
269 /* Outer IP, Inner IP CSO */
270 txbd1->lflags |= TX_BD_FLG_TIP_IP_CHKSUM;
272 } else if ((tx_pkt->ol_flags & PKT_TX_TCP_UDP_CKSUM) ==
273 PKT_TX_TCP_UDP_CKSUM) {
275 txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
277 } else if ((tx_pkt->ol_flags & PKT_TX_TCP_CKSUM) ==
280 txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
282 } else if ((tx_pkt->ol_flags & PKT_TX_UDP_CKSUM) ==
285 txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
287 } else if ((tx_pkt->ol_flags & PKT_TX_IP_CKSUM) ==
290 txbd1->lflags |= TX_BD_LONG_LFLAGS_IP_CHKSUM;
292 } else if ((tx_pkt->ol_flags & PKT_TX_OUTER_IP_CKSUM) ==
293 PKT_TX_OUTER_IP_CKSUM) {
295 txbd1->lflags |= TX_BD_LONG_LFLAGS_T_IP_CHKSUM;
299 txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT;
302 m_seg = tx_pkt->next;
304 /* Check non zero data_len */
305 RTE_VERIFY(m_seg->data_len);
306 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
307 tx_buf = &txr->tx_buf_ring[txr->tx_prod];
308 tx_buf->mbuf = m_seg;
310 txbd = &txr->tx_desc_ring[txr->tx_prod];
311 txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(m_seg));
312 txbd->flags_type = TX_BD_SHORT_TYPE_TX_BD_SHORT;
313 txbd->len = m_seg->data_len;
318 txbd->flags_type |= TX_BD_LONG_FLAGS_PACKET_END;
320 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
325 static void bnxt_tx_cmp(struct bnxt_tx_queue *txq, int nr_pkts)
327 struct bnxt_tx_ring_info *txr = txq->tx_ring;
328 struct rte_mempool *pool = NULL;
329 struct rte_mbuf **free = txq->free;
330 uint16_t cons = txr->tx_cons;
331 unsigned int blk = 0;
334 for (i = 0; i < nr_pkts; i++) {
335 struct rte_mbuf *mbuf;
336 struct bnxt_sw_tx_bd *tx_buf = &txr->tx_buf_ring[cons];
337 unsigned short nr_bds = tx_buf->nr_bds;
339 for (j = 0; j < nr_bds; j++) {
342 cons = RING_NEXT(txr->tx_ring_struct, cons);
343 tx_buf = &txr->tx_buf_ring[cons];
344 if (!mbuf) /* long_bd's tx_buf ? */
347 mbuf = rte_pktmbuf_prefree_seg(mbuf);
351 /* EW - no need to unmap DMA memory? */
353 if (likely(mbuf->pool == pool)) {
354 /* Add mbuf to the bulk free array */
357 /* Found an mbuf from a different pool. Free
358 * mbufs accumulated so far to the previous
361 if (likely(pool != NULL))
362 rte_mempool_put_bulk(pool,
366 /* Start accumulating mbufs in a new pool */
374 rte_mempool_put_bulk(pool, (void *)free, blk);
379 static int bnxt_handle_tx_cp(struct bnxt_tx_queue *txq)
381 struct bnxt_cp_ring_info *cpr = txq->cp_ring;
382 uint32_t raw_cons = cpr->cp_raw_cons;
384 uint32_t nb_tx_pkts = 0;
385 struct tx_cmpl *txcmp;
386 struct cmpl_base *cp_desc_ring = cpr->cp_desc_ring;
387 struct bnxt_ring *cp_ring_struct = cpr->cp_ring_struct;
388 uint32_t ring_mask = cp_ring_struct->ring_mask;
391 if (bnxt_tx_bds_in_hw(txq) < txq->tx_free_thresh)
395 cons = RING_CMPL(ring_mask, raw_cons);
396 txcmp = (struct tx_cmpl *)&cpr->cp_desc_ring[cons];
397 rte_prefetch_non_temporal(&cp_desc_ring[(cons + 2) &
400 if (!CMPL_VALID(txcmp, cpr->valid))
402 opaque = rte_cpu_to_le_32(txcmp->opaque);
403 NEXT_CMPL(cpr, cons, cpr->valid, 1);
404 rte_prefetch0(&cp_desc_ring[cons]);
406 if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2)
407 nb_tx_pkts += opaque;
410 "Unhandled CMP type %02x\n",
413 } while (nb_tx_pkts < ring_mask);
416 bnxt_tx_cmp(txq, nb_tx_pkts);
417 cpr->cp_raw_cons = raw_cons;
418 B_CP_DB(cpr, cpr->cp_raw_cons, ring_mask);
424 uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
428 uint16_t nb_tx_pkts = 0;
429 uint16_t coal_pkts = 0;
430 struct bnxt_tx_queue *txq = tx_queue;
431 struct tx_bd_long *last_txbd = NULL;
433 /* Handle TX completions */
434 bnxt_handle_tx_cp(txq);
436 /* Tx queue was stopped; wait for it to be restarted */
437 if (txq->tx_deferred_start) {
438 PMD_DRV_LOG(DEBUG, "Tx q stopped;return\n");
442 /* Handle TX burst request */
443 for (nb_tx_pkts = 0; nb_tx_pkts < nb_pkts; nb_tx_pkts++) {
445 rc = bnxt_start_xmit(tx_pkts[nb_tx_pkts], txq,
446 &coal_pkts, &last_txbd);
452 if (likely(nb_tx_pkts)) {
453 /* Request a completion on the last packet */
454 last_txbd->flags_type &= ~TX_BD_LONG_FLAGS_NO_CMPL;
455 B_TX_DB(txq->tx_ring->tx_doorbell, txq->tx_ring->tx_prod);
461 int bnxt_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
463 struct bnxt *bp = dev->data->dev_private;
464 struct bnxt_tx_queue *txq = bp->tx_queues[tx_queue_id];
466 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
467 txq->tx_deferred_start = false;
468 PMD_DRV_LOG(DEBUG, "Tx queue started\n");
473 int bnxt_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
475 struct bnxt *bp = dev->data->dev_private;
476 struct bnxt_tx_queue *txq = bp->tx_queues[tx_queue_id];
478 /* Handle TX completions */
479 bnxt_handle_tx_cp(txq);
481 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
482 txq->tx_deferred_start = true;
483 PMD_DRV_LOG(DEBUG, "Tx queue stopped\n");