aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/bnxt/bnxt_txr.c
blob: 8bf8fee3123e64b82b7f08822365132c718a0b7b (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
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
/*-
 *   BSD LICENSE
 *
 *   Copyright(c) Broadcom Limited.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Broadcom Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <inttypes.h>

#include <rte_byteorder.h>
#include <rte_malloc.h>

#include "bnxt.h"
#include "bnxt_cpr.h"
#include "bnxt_ring.h"
#include "bnxt_txq.h"
#include "bnxt_txr.h"
#include "hsi_struct_def_dpdk.h"
#include <stdbool.h>

/*
 * TX Ring handling
 */

void bnxt_free_tx_rings(struct bnxt *bp)
{
	int i;

	for (i = 0; i < (int)bp->tx_nr_rings; i++) {
		struct bnxt_tx_queue *txq = bp->tx_queues[i];

		if (!txq)
			continue;

		bnxt_free_ring(txq->tx_ring->tx_ring_struct);
		rte_free(txq->tx_ring->tx_ring_struct);
		rte_free(txq->tx_ring);

		bnxt_free_ring(txq->cp_ring->cp_ring_struct);
		rte_free(txq->cp_ring->cp_ring_struct);
		rte_free(txq->cp_ring);

		rte_free(txq);
		bp->tx_queues[i] = NULL;
	}
}

int bnxt_init_one_tx_ring(struct bnxt_tx_queue *txq)
{
	struct bnxt_tx_ring_info *txr = txq->tx_ring;
	struct bnxt_ring *ring = txr->tx_ring_struct;

	txq->tx_wake_thresh = ring->ring_size / 2;
	ring->fw_ring_id = INVALID_HW_RING_ID;

	return 0;
}

int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id)
{
	struct bnxt_cp_ring_info *cpr;
	struct bnxt_tx_ring_info *txr;
	struct bnxt_ring *ring;

	txr = rte_zmalloc_socket("bnxt_tx_ring",
				 sizeof(struct bnxt_tx_ring_info),
				 RTE_CACHE_LINE_SIZE, socket_id);
	if (txr == NULL)
		return -ENOMEM;
	txq->tx_ring = txr;

	ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
				  sizeof(struct bnxt_ring),
				  RTE_CACHE_LINE_SIZE, socket_id);
	if (ring == NULL)
		return -ENOMEM;
	txr->tx_ring_struct = ring;
	ring->ring_size = rte_align32pow2(txq->nb_tx_desc + 1);
	ring->ring_mask = ring->ring_size - 1;
	ring->bd = (void *)txr->tx_desc_ring;
	ring->bd_dma = txr->tx_desc_mapping;
	ring->vmem_size = ring->ring_size * sizeof(struct bnxt_sw_tx_bd);
	ring->vmem = (void **)&txr->tx_buf_ring;

	cpr = rte_zmalloc_socket("bnxt_tx_ring",
				 sizeof(struct bnxt_cp_ring_info),
				 RTE_CACHE_LINE_SIZE, socket_id);
	if (cpr == NULL)
		return -ENOMEM;
	txq->cp_ring = cpr;

	ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
				  sizeof(struct bnxt_ring),
				  RTE_CACHE_LINE_SIZE, socket_id);
	if (ring == NULL)
		return -ENOMEM;
	cpr->cp_ring_struct = ring;
	ring->ring_size = txr->tx_ring_struct->ring_size;
	ring->ring_mask = ring->ring_size - 1;
	ring->bd = (void *)cpr->cp_desc_ring;
	ring->bd_dma = cpr->cp_desc_mapping;
	ring->vmem_size = 0;
	ring->vmem = NULL;

	return 0;
}

static inline uint32_t bnxt_tx_avail(struct bnxt_tx_ring_info *txr)
{
	/* Tell compiler to fetch tx indices from memory. */
	rte_compiler_barrier();

	return txr->tx_ring_struct->ring_size -
		((txr->tx_prod - txr->tx_cons) &
			txr->tx_ring_struct->ring_mask) - 1;
}

static uint16_t bnxt_start_xmit(struct rte_mbuf *tx_pkt,
				struct bnxt_tx_queue *txq)
{
	struct bnxt_tx_ring_info *txr = txq->tx_ring;
	struct tx_bd_long *txbd;
	struct tx_bd_long_hi *txbd1;
	uint32_t vlan_tag_flags, cfa_action;
	bool long_bd = false;
	uint16_t last_prod = 0;
	struct rte_mbuf *m_seg;
	struct bnxt_sw_tx_bd *tx_buf;
	static const uint32_t lhint_arr[4] = {
		TX_BD_LONG_FLAGS_LHINT_LT512,
		TX_BD_LONG_FLAGS_LHINT_LT1K,
		TX_BD_LONG_FLAGS_LHINT_LT2K,
		TX_BD_LONG_FLAGS_LHINT_LT2K
	};

	if (tx_pkt->ol_flags & (PKT_TX_TCP_SEG | PKT_TX_TCP_CKSUM |
				PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM |
				PKT_TX_VLAN_PKT))
		long_bd = true;

	tx_buf = &txr->tx_buf_ring[txr->tx_prod];
	tx_buf->mbuf = tx_pkt;
	tx_buf->nr_bds = long_bd + tx_pkt->nb_segs;
	last_prod = (txr->tx_prod + tx_buf->nr_bds - 1) &
				txr->tx_ring_struct->ring_mask;

	if (unlikely(bnxt_tx_avail(txr) < tx_buf->nr_bds))
		return -ENOMEM;

	txbd = &txr->tx_desc_ring[txr->tx_prod];
	txbd->opaque = txr->tx_prod;
	txbd->flags_type = tx_buf->nr_bds << TX_BD_LONG_FLAGS_BD_CNT_SFT;
	txbd->len = tx_pkt->data_len;
	if (txbd->len >= 2014)
		txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K;
	else
		txbd->flags_type |= lhint_arr[txbd->len >> 9];
	txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(tx_buf->mbuf));

	if (long_bd) {
		txbd->flags_type |= TX_BD_LONG_TYPE_TX_BD_LONG;
		vlan_tag_flags = 0;
		cfa_action = 0;
		if (tx_buf->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
			/* shurd: Should this mask at
			 * TX_BD_LONG_CFA_META_VLAN_VID_MASK?
			 */
			vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG |
				tx_buf->mbuf->vlan_tci;
			/* Currently supports 8021Q, 8021AD vlan offloads
			 * QINQ1, QINQ2, QINQ3 vlan headers are deprecated
			 */
			/* DPDK only supports 802.11q VLAN packets */
			vlan_tag_flags |=
					TX_BD_LONG_CFA_META_VLAN_TPID_TPID8100;
		}

		txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);

		txbd1 = (struct tx_bd_long_hi *)
					&txr->tx_desc_ring[txr->tx_prod];
		txbd1->lflags = 0;
		txbd1->cfa_meta = vlan_tag_flags;
		txbd1->cfa_action = cfa_action;

		if (tx_pkt->ol_flags & PKT_TX_TCP_SEG) {
			/* TSO */
			txbd1->lflags = TX_BD_LONG_LFLAGS_LSO;
			txbd1->hdr_size = tx_pkt->l2_len + tx_pkt->l3_len +
					tx_pkt->l4_len;
			txbd1->mss = tx_pkt->tso_segsz;

		} else if (tx_pkt->ol_flags & (PKT_TX_TCP_CKSUM |
					PKT_TX_UDP_CKSUM)) {
			/* TCP/UDP CSO */
			txbd1->lflags = TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
			txbd1->mss = 0;

		} else if (tx_pkt->ol_flags & PKT_TX_IP_CKSUM) {
			/* IP CSO */
			txbd1->lflags = TX_BD_LONG_LFLAGS_IP_CHKSUM;
			txbd1->mss = 0;
		}
	} else {
		txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT;
	}

	m_seg = tx_pkt->next;
	/* i is set at the end of the if(long_bd) block */
	while (txr->tx_prod != last_prod) {
		txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
		tx_buf = &txr->tx_buf_ring[txr->tx_prod];

		txbd = &txr->tx_desc_ring[txr->tx_prod];
		txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(m_seg));
		txbd->flags_type = TX_BD_SHORT_TYPE_TX_BD_SHORT;
		txbd->len = m_seg->data_len;

		m_seg = m_seg->next;
	}

	txbd->flags_type |= TX_BD_LONG_FLAGS_PACKET_END;

	txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);

	return 0;
}

static void bnxt_tx_cmp(struct bnxt_tx_queue *txq, int nr_pkts)
{
	struct bnxt_tx_ring_info *txr = txq->tx_ring;
	uint16_t cons = txr->tx_cons;
	int i, j;

	for (i = 0; i < nr_pkts; i++) {
		struct bnxt_sw_tx_bd *tx_buf;
		struct rte_mbuf *mbuf;

		tx_buf = &txr->tx_buf_ring[cons];
		cons = RING_NEXT(txr->tx_ring_struct, cons);
		mbuf = tx_buf->mbuf;
		tx_buf->mbuf = NULL;

		/* EW - no need to unmap DMA memory? */

		for (j = 1; j < tx_buf->nr_bds; j++)
			cons = RING_NEXT(txr->tx_ring_struct, cons);
		rte_pktmbuf_free(mbuf);
	}

	txr->tx_cons = cons;
}

static int bnxt_handle_tx_cp(struct bnxt_tx_queue *txq)
{
	struct bnxt_cp_ring_info *cpr = txq->cp_ring;
	uint32_t raw_cons = cpr->cp_raw_cons;
	uint32_t cons;
	int nb_tx_pkts = 0;
	struct tx_cmpl *txcmp;

	if ((txq->tx_ring->tx_ring_struct->ring_size -
			(bnxt_tx_avail(txq->tx_ring))) >
			txq->tx_free_thresh) {
		while (1) {
			cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
			txcmp = (struct tx_cmpl *)&cpr->cp_desc_ring[cons];

			if (!CMP_VALID(txcmp, raw_cons, cpr->cp_ring_struct))
				break;

			if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2)
				nb_tx_pkts++;
			else
				RTE_LOG(DEBUG, PMD,
						"Unhandled CMP type %02x\n",
						CMP_TYPE(txcmp));
			raw_cons = NEXT_RAW_CMP(raw_cons);
		}
		if (nb_tx_pkts)
			bnxt_tx_cmp(txq, nb_tx_pkts);
		cpr->cp_raw_cons = raw_cons;
		B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
	}
	return nb_tx_pkts;
}

uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
			       uint16_t nb_pkts)
{
	struct bnxt_tx_queue *txq = tx_queue;
	uint16_t nb_tx_pkts = 0;
	uint16_t db_mask = txq->tx_ring->tx_ring_struct->ring_size >> 2;
	uint16_t last_db_mask = 0;

	/* Handle TX completions */
	bnxt_handle_tx_cp(txq);

	/* Handle TX burst request */
	for (nb_tx_pkts = 0; nb_tx_pkts < nb_pkts; nb_tx_pkts++) {
		if (bnxt_start_xmit(tx_pkts[nb_tx_pkts], txq)) {
			break;
		} else if ((nb_tx_pkts & db_mask) != last_db_mask) {
			B_TX_DB(txq->tx_ring->tx_doorbell,
					txq->tx_ring->tx_prod);
			last_db_mask = nb_tx_pkts & db_mask;
		}
	}
	if (nb_tx_pkts)
		B_TX_DB(txq->tx_ring->tx_doorbell, txq->tx_ring->tx_prod);

	return nb_tx_pkts;
}