1/*-
2 *   BSD LICENSE
3 *
4 *   Copyright(c) Broadcom Limited.
5 *   All rights reserved.
6 *
7 *   Redistribution and use in source and binary forms, with or without
8 *   modification, are permitted provided that the following conditions
9 *   are met:
10 *
11 *     * Redistributions of source code must retain the above copyright
12 *       notice, this list of conditions and the following disclaimer.
13 *     * Redistributions in binary form must reproduce the above copyright
14 *       notice, this list of conditions and the following disclaimer in
15 *       the documentation and/or other materials provided with the
16 *       distribution.
17 *     * Neither the name of Broadcom Corporation nor the names of its
18 *       contributors may be used to endorse or promote products derived
19 *       from this software without specific prior written permission.
20 *
21 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <inttypes.h>
35
36#include <rte_byteorder.h>
37#include <rte_malloc.h>
38
39#include "bnxt.h"
40#include "bnxt_cpr.h"
41#include "bnxt_ring.h"
42#include "bnxt_txq.h"
43#include "bnxt_txr.h"
44#include "hsi_struct_def_dpdk.h"
45#include <stdbool.h>
46
47/*
48 * TX Ring handling
49 */
50
51void bnxt_free_tx_rings(struct bnxt *bp)
52{
53	int i;
54
55	for (i = 0; i < (int)bp->tx_nr_rings; i++) {
56		struct bnxt_tx_queue *txq = bp->tx_queues[i];
57
58		if (!txq)
59			continue;
60
61		bnxt_free_ring(txq->tx_ring->tx_ring_struct);
62		rte_free(txq->tx_ring->tx_ring_struct);
63		rte_free(txq->tx_ring);
64
65		bnxt_free_ring(txq->cp_ring->cp_ring_struct);
66		rte_free(txq->cp_ring->cp_ring_struct);
67		rte_free(txq->cp_ring);
68
69		rte_free(txq);
70		bp->tx_queues[i] = NULL;
71	}
72}
73
74int bnxt_init_one_tx_ring(struct bnxt_tx_queue *txq)
75{
76	struct bnxt_tx_ring_info *txr = txq->tx_ring;
77	struct bnxt_ring *ring = txr->tx_ring_struct;
78
79	txq->tx_wake_thresh = ring->ring_size / 2;
80	ring->fw_ring_id = INVALID_HW_RING_ID;
81
82	return 0;
83}
84
85int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id)
86{
87	struct bnxt_cp_ring_info *cpr;
88	struct bnxt_tx_ring_info *txr;
89	struct bnxt_ring *ring;
90
91	txr = rte_zmalloc_socket("bnxt_tx_ring",
92				 sizeof(struct bnxt_tx_ring_info),
93				 RTE_CACHE_LINE_SIZE, socket_id);
94	if (txr == NULL)
95		return -ENOMEM;
96	txq->tx_ring = txr;
97
98	ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
99				  sizeof(struct bnxt_ring),
100				  RTE_CACHE_LINE_SIZE, socket_id);
101	if (ring == NULL)
102		return -ENOMEM;
103	txr->tx_ring_struct = ring;
104	ring->ring_size = rte_align32pow2(txq->nb_tx_desc);
105	ring->ring_mask = ring->ring_size - 1;
106	ring->bd = (void *)txr->tx_desc_ring;
107	ring->bd_dma = txr->tx_desc_mapping;
108	ring->vmem_size = ring->ring_size * sizeof(struct bnxt_sw_tx_bd);
109	ring->vmem = (void **)&txr->tx_buf_ring;
110
111	cpr = rte_zmalloc_socket("bnxt_tx_ring",
112				 sizeof(struct bnxt_cp_ring_info),
113				 RTE_CACHE_LINE_SIZE, socket_id);
114	if (cpr == NULL)
115		return -ENOMEM;
116	txq->cp_ring = cpr;
117
118	ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
119				  sizeof(struct bnxt_ring),
120				  RTE_CACHE_LINE_SIZE, socket_id);
121	if (ring == NULL)
122		return -ENOMEM;
123	cpr->cp_ring_struct = ring;
124	ring->ring_size = txr->tx_ring_struct->ring_size;
125	ring->ring_mask = ring->ring_size - 1;
126	ring->bd = (void *)cpr->cp_desc_ring;
127	ring->bd_dma = cpr->cp_desc_mapping;
128	ring->vmem_size = 0;
129	ring->vmem = NULL;
130
131	return 0;
132}
133
134static inline uint32_t bnxt_tx_avail(struct bnxt_tx_ring_info *txr)
135{
136	/* Tell compiler to fetch tx indices from memory. */
137	rte_compiler_barrier();
138
139	return txr->tx_ring_struct->ring_size -
140		((txr->tx_prod - txr->tx_cons) &
141			txr->tx_ring_struct->ring_mask) - 1;
142}
143
144static uint16_t bnxt_start_xmit(struct rte_mbuf *tx_pkt,
145				struct bnxt_tx_queue *txq)
146{
147	struct bnxt_tx_ring_info *txr = txq->tx_ring;
148	struct tx_bd_long *txbd;
149	struct tx_bd_long_hi *txbd1 = NULL;
150	uint32_t vlan_tag_flags, cfa_action;
151	bool long_bd = false;
152	uint16_t last_prod = 0;
153	struct rte_mbuf *m_seg;
154	struct bnxt_sw_tx_bd *tx_buf;
155	static const uint32_t lhint_arr[4] = {
156		TX_BD_LONG_FLAGS_LHINT_LT512,
157		TX_BD_LONG_FLAGS_LHINT_LT1K,
158		TX_BD_LONG_FLAGS_LHINT_LT2K,
159		TX_BD_LONG_FLAGS_LHINT_LT2K
160	};
161
162	if (tx_pkt->ol_flags & (PKT_TX_TCP_SEG | PKT_TX_TCP_CKSUM |
163				PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM |
164				PKT_TX_VLAN_PKT | PKT_TX_OUTER_IP_CKSUM |
165				PKT_TX_TUNNEL_GRE | PKT_TX_TUNNEL_VXLAN |
166				PKT_TX_TUNNEL_GENEVE))
167		long_bd = true;
168
169	tx_buf = &txr->tx_buf_ring[txr->tx_prod];
170	tx_buf->mbuf = tx_pkt;
171	tx_buf->nr_bds = long_bd + tx_pkt->nb_segs;
172	last_prod = (txr->tx_prod + tx_buf->nr_bds - 1) &
173				txr->tx_ring_struct->ring_mask;
174
175	if (unlikely(bnxt_tx_avail(txr) < tx_buf->nr_bds))
176		return -ENOMEM;
177
178	txbd = &txr->tx_desc_ring[txr->tx_prod];
179	txbd->opaque = txr->tx_prod;
180	txbd->flags_type = tx_buf->nr_bds << TX_BD_LONG_FLAGS_BD_CNT_SFT;
181	txbd->len = tx_pkt->data_len;
182	if (tx_pkt->pkt_len >= 2014)
183		txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K;
184	else
185		txbd->flags_type |= lhint_arr[tx_pkt->pkt_len >> 9];
186	txbd->addr = rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR(tx_buf->mbuf));
187
188	if (long_bd) {
189		txbd->flags_type |= TX_BD_LONG_TYPE_TX_BD_LONG;
190		vlan_tag_flags = 0;
191		cfa_action = 0;
192		if (tx_buf->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
193			/* shurd: Should this mask at
194			 * TX_BD_LONG_CFA_META_VLAN_VID_MASK?
195			 */
196			vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG |
197				tx_buf->mbuf->vlan_tci;
198			/* Currently supports 8021Q, 8021AD vlan offloads
199			 * QINQ1, QINQ2, QINQ3 vlan headers are deprecated
200			 */
201			/* DPDK only supports 802.11q VLAN packets */
202			vlan_tag_flags |=
203					TX_BD_LONG_CFA_META_VLAN_TPID_TPID8100;
204		}
205
206		txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
207
208		txbd1 = (struct tx_bd_long_hi *)
209					&txr->tx_desc_ring[txr->tx_prod];
210		txbd1->lflags = 0;
211		txbd1->cfa_meta = vlan_tag_flags;
212		txbd1->cfa_action = cfa_action;
213
214		if (tx_pkt->ol_flags & PKT_TX_TCP_SEG) {
215			/* TSO */
216			txbd1->lflags |= TX_BD_LONG_LFLAGS_LSO;
217			txbd1->hdr_size = tx_pkt->l2_len + tx_pkt->l3_len +
218					tx_pkt->l4_len;
219			txbd1->mss = tx_pkt->tso_segsz;
220
221		} else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_UDP_CKSUM) ==
222			   PKT_TX_OIP_IIP_TCP_UDP_CKSUM) {
223			/* Outer IP, Inner IP, Inner TCP/UDP CSO */
224			txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
225			txbd1->mss = 0;
226		} else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_CKSUM) ==
227			   PKT_TX_OIP_IIP_TCP_CKSUM) {
228			/* Outer IP, Inner IP, Inner TCP/UDP CSO */
229			txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
230			txbd1->mss = 0;
231		} else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_UDP_CKSUM) ==
232			   PKT_TX_OIP_IIP_UDP_CKSUM) {
233			/* Outer IP, Inner IP, Inner TCP/UDP CSO */
234			txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
235			txbd1->mss = 0;
236		} else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_UDP_CKSUM) ==
237			   PKT_TX_IIP_TCP_UDP_CKSUM) {
238			/* (Inner) IP, (Inner) TCP/UDP CSO */
239			txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
240			txbd1->mss = 0;
241		} else if ((tx_pkt->ol_flags & PKT_TX_IIP_UDP_CKSUM) ==
242			   PKT_TX_IIP_UDP_CKSUM) {
243			/* (Inner) IP, (Inner) TCP/UDP CSO */
244			txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
245			txbd1->mss = 0;
246		} else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_CKSUM) ==
247			   PKT_TX_IIP_TCP_CKSUM) {
248			/* (Inner) IP, (Inner) TCP/UDP CSO */
249			txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
250			txbd1->mss = 0;
251		} else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_UDP_CKSUM) ==
252			   PKT_TX_OIP_TCP_UDP_CKSUM) {
253			/* Outer IP, (Inner) TCP/UDP CSO */
254			txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
255			txbd1->mss = 0;
256		} else if ((tx_pkt->ol_flags & PKT_TX_OIP_UDP_CKSUM) ==
257			   PKT_TX_OIP_UDP_CKSUM) {
258			/* Outer IP, (Inner) TCP/UDP CSO */
259			txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
260			txbd1->mss = 0;
261		} else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_CKSUM) ==
262			   PKT_TX_OIP_TCP_CKSUM) {
263			/* Outer IP, (Inner) TCP/UDP CSO */
264			txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
265			txbd1->mss = 0;
266		} else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_CKSUM) ==
267			   PKT_TX_OIP_IIP_CKSUM) {
268			/* Outer IP, Inner IP CSO */
269			txbd1->lflags |= TX_BD_FLG_TIP_IP_CHKSUM;
270			txbd1->mss = 0;
271		} else if ((tx_pkt->ol_flags & PKT_TX_TCP_UDP_CKSUM) ==
272			   PKT_TX_TCP_UDP_CKSUM) {
273			/* TCP/UDP CSO */
274			txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
275			txbd1->mss = 0;
276		} else if ((tx_pkt->ol_flags & PKT_TX_TCP_CKSUM) ==
277			   PKT_TX_TCP_CKSUM) {
278			/* TCP/UDP CSO */
279			txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
280			txbd1->mss = 0;
281		} else if ((tx_pkt->ol_flags & PKT_TX_UDP_CKSUM) ==
282			   PKT_TX_UDP_CKSUM) {
283			/* TCP/UDP CSO */
284			txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
285			txbd1->mss = 0;
286		} else if ((tx_pkt->ol_flags & PKT_TX_IP_CKSUM) ==
287			   PKT_TX_IP_CKSUM) {
288			/* IP CSO */
289			txbd1->lflags |= TX_BD_LONG_LFLAGS_IP_CHKSUM;
290			txbd1->mss = 0;
291		} else if ((tx_pkt->ol_flags & PKT_TX_OUTER_IP_CKSUM) ==
292			   PKT_TX_OUTER_IP_CKSUM) {
293			/* IP CSO */
294			txbd1->lflags |= TX_BD_LONG_LFLAGS_T_IP_CHKSUM;
295			txbd1->mss = 0;
296		}
297	} else {
298		txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT;
299	}
300
301	m_seg = tx_pkt->next;
302	/* i is set at the end of the if(long_bd) block */
303	while (txr->tx_prod != last_prod) {
304		txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
305		tx_buf = &txr->tx_buf_ring[txr->tx_prod];
306
307		txbd = &txr->tx_desc_ring[txr->tx_prod];
308		txbd->addr = rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR(m_seg));
309		txbd->flags_type = TX_BD_SHORT_TYPE_TX_BD_SHORT;
310		txbd->len = m_seg->data_len;
311
312		m_seg = m_seg->next;
313	}
314
315	txbd->flags_type |= TX_BD_LONG_FLAGS_PACKET_END;
316	if (txbd1)
317		txbd1->lflags = rte_cpu_to_le_32(txbd1->lflags);
318
319	txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
320
321	return 0;
322}
323
324static void bnxt_tx_cmp(struct bnxt_tx_queue *txq, int nr_pkts)
325{
326	struct bnxt_tx_ring_info *txr = txq->tx_ring;
327	uint16_t cons = txr->tx_cons;
328	int i, j;
329
330	for (i = 0; i < nr_pkts; i++) {
331		struct bnxt_sw_tx_bd *tx_buf;
332		struct rte_mbuf *mbuf;
333
334		tx_buf = &txr->tx_buf_ring[cons];
335		cons = RING_NEXT(txr->tx_ring_struct, cons);
336		mbuf = tx_buf->mbuf;
337		tx_buf->mbuf = NULL;
338
339		/* EW - no need to unmap DMA memory? */
340
341		for (j = 1; j < tx_buf->nr_bds; j++)
342			cons = RING_NEXT(txr->tx_ring_struct, cons);
343		rte_pktmbuf_free(mbuf);
344	}
345
346	txr->tx_cons = cons;
347}
348
349static int bnxt_handle_tx_cp(struct bnxt_tx_queue *txq)
350{
351	struct bnxt_cp_ring_info *cpr = txq->cp_ring;
352	uint32_t raw_cons = cpr->cp_raw_cons;
353	uint32_t cons;
354	int nb_tx_pkts = 0;
355	struct tx_cmpl *txcmp;
356
357	if ((txq->tx_ring->tx_ring_struct->ring_size -
358			(bnxt_tx_avail(txq->tx_ring))) >
359			txq->tx_free_thresh) {
360		while (1) {
361			cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
362			txcmp = (struct tx_cmpl *)&cpr->cp_desc_ring[cons];
363
364			if (!CMP_VALID(txcmp, raw_cons, cpr->cp_ring_struct))
365				break;
366
367			if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2)
368				nb_tx_pkts++;
369			else
370				RTE_LOG(DEBUG, PMD,
371						"Unhandled CMP type %02x\n",
372						CMP_TYPE(txcmp));
373			raw_cons = NEXT_RAW_CMP(raw_cons);
374		}
375		if (nb_tx_pkts)
376			bnxt_tx_cmp(txq, nb_tx_pkts);
377		cpr->cp_raw_cons = raw_cons;
378		B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
379	}
380	return nb_tx_pkts;
381}
382
383uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
384			       uint16_t nb_pkts)
385{
386	struct bnxt_tx_queue *txq = tx_queue;
387	uint16_t nb_tx_pkts = 0;
388	uint16_t db_mask = txq->tx_ring->tx_ring_struct->ring_size >> 2;
389	uint16_t last_db_mask = 0;
390
391	/* Handle TX completions */
392	bnxt_handle_tx_cp(txq);
393
394	/* Handle TX burst request */
395	for (nb_tx_pkts = 0; nb_tx_pkts < nb_pkts; nb_tx_pkts++) {
396		if (bnxt_start_xmit(tx_pkts[nb_tx_pkts], txq)) {
397			break;
398		} else if ((nb_tx_pkts & db_mask) != last_db_mask) {
399			B_TX_DB(txq->tx_ring->tx_doorbell,
400					txq->tx_ring->tx_prod);
401			last_db_mask = nb_tx_pkts & db_mask;
402		}
403	}
404	if (nb_tx_pkts)
405		B_TX_DB(txq->tx_ring->tx_doorbell, txq->tx_ring->tx_prod);
406
407	return nb_tx_pkts;
408}
409