adf0309255da2f191c9f6c4f3071ee7381d31ad1
[dpdk.git] / drivers / net / bnx2x / bnx2x_rxtx.c
1 /*
2  * Copyright (c) 2013-2015 Brocade Communications Systems, Inc.
3  *
4  * Copyright (c) 2015 QLogic Corporation.
5  * All rights reserved.
6  * www.qlogic.com
7  *
8  * See LICENSE.bnx2x_pmd for copyright and licensing details.
9  */
10
11 #include "bnx2x.h"
12 #include "bnx2x_rxtx.h"
13
14 static const struct rte_memzone *
15 ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
16                       uint16_t queue_id, uint32_t ring_size, int socket_id)
17 {
18         char z_name[RTE_MEMZONE_NAMESIZE];
19         const struct rte_memzone *mz;
20
21         snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
22                         dev->driver->pci_drv.driver.name, ring_name,
23                         dev->data->port_id, queue_id);
24
25         mz = rte_memzone_lookup(z_name);
26         if (mz)
27                 return mz;
28
29         return rte_memzone_reserve_aligned(z_name, ring_size, socket_id, 0, BNX2X_PAGE_SIZE);
30 }
31
32 static void
33 bnx2x_rx_queue_release(struct bnx2x_rx_queue *rx_queue)
34 {
35         uint16_t i;
36         struct rte_mbuf **sw_ring;
37
38         if (NULL != rx_queue) {
39
40                 sw_ring = rx_queue->sw_ring;
41                 if (NULL != sw_ring) {
42                         for (i = 0; i < rx_queue->nb_rx_desc; i++) {
43                                 if (NULL != sw_ring[i])
44                                         rte_pktmbuf_free(sw_ring[i]);
45                         }
46                         rte_free(sw_ring);
47                 }
48                 rte_free(rx_queue);
49         }
50 }
51
52 void
53 bnx2x_dev_rx_queue_release(void *rxq)
54 {
55         bnx2x_rx_queue_release(rxq);
56 }
57
58 int
59 bnx2x_dev_rx_queue_setup(struct rte_eth_dev *dev,
60                        uint16_t queue_idx,
61                        uint16_t nb_desc,
62                        unsigned int socket_id,
63                        __rte_unused const struct rte_eth_rxconf *rx_conf,
64                        struct rte_mempool *mp)
65 {
66         uint16_t j, idx;
67         const struct rte_memzone *dma;
68         struct bnx2x_rx_queue *rxq;
69         uint32_t dma_size;
70         struct rte_mbuf *mbuf;
71         struct bnx2x_softc *sc = dev->data->dev_private;
72         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
73         struct eth_rx_cqe_next_page *nextpg;
74         phys_addr_t *rx_bd;
75         phys_addr_t busaddr;
76
77         /* First allocate the rx queue data structure */
78         rxq = rte_zmalloc_socket("ethdev RX queue", sizeof(struct bnx2x_rx_queue),
79                                  RTE_CACHE_LINE_SIZE, socket_id);
80         if (NULL == rxq) {
81                 PMD_INIT_LOG(ERR, "rte_zmalloc for rxq failed!");
82                 return -ENOMEM;
83         }
84         rxq->sc = sc;
85         rxq->mb_pool = mp;
86         rxq->queue_id = queue_idx;
87         rxq->port_id = dev->data->port_id;
88
89         rxq->nb_rx_pages = 1;
90         while (USABLE_RX_BD(rxq) < nb_desc)
91                 rxq->nb_rx_pages <<= 1;
92
93         rxq->nb_rx_desc  = TOTAL_RX_BD(rxq);
94         sc->rx_ring_size = USABLE_RX_BD(rxq);
95         rxq->nb_cq_pages = RCQ_BD_PAGES(rxq);
96
97         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, usable_bd=%lu, "
98                        "total_bd=%lu, rx_pages=%u, cq_pages=%u",
99                        queue_idx, nb_desc, (unsigned long)USABLE_RX_BD(rxq),
100                        (unsigned long)TOTAL_RX_BD(rxq), rxq->nb_rx_pages,
101                        rxq->nb_cq_pages);
102
103         /* Allocate RX ring hardware descriptors */
104         dma_size = rxq->nb_rx_desc * sizeof(struct eth_rx_bd);
105         dma = ring_dma_zone_reserve(dev, "hw_ring", queue_idx, dma_size, socket_id);
106         if (NULL == dma) {
107                 PMD_RX_LOG(ERR, "ring_dma_zone_reserve for rx_ring failed!");
108                 bnx2x_rx_queue_release(rxq);
109                 return -ENOMEM;
110         }
111         fp->rx_desc_mapping = rxq->rx_ring_phys_addr = (uint64_t)dma->phys_addr;
112         rxq->rx_ring = (uint64_t*)dma->addr;
113         memset((void *)rxq->rx_ring, 0, dma_size);
114
115         /* Link the RX chain pages. */
116         for (j = 1; j <= rxq->nb_rx_pages; j++) {
117                 rx_bd = &rxq->rx_ring[TOTAL_RX_BD_PER_PAGE * j - 2];
118                 busaddr = rxq->rx_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_rx_pages);
119                 *rx_bd = busaddr;
120         }
121
122         /* Allocate software ring */
123         dma_size = rxq->nb_rx_desc * sizeof(struct bnx2x_rx_entry);
124         rxq->sw_ring = rte_zmalloc_socket("sw_ring", dma_size,
125                                           RTE_CACHE_LINE_SIZE,
126                                           socket_id);
127         if (NULL == rxq->sw_ring) {
128                 PMD_RX_LOG(ERR, "rte_zmalloc for sw_ring failed!");
129                 bnx2x_rx_queue_release(rxq);
130                 return -ENOMEM;
131         }
132
133         /* Initialize software ring entries */
134         for (idx = 0; idx < rxq->nb_rx_desc; idx = NEXT_RX_BD(idx)) {
135                 mbuf = rte_mbuf_raw_alloc(mp);
136                 if (NULL == mbuf) {
137                         PMD_RX_LOG(ERR, "RX mbuf alloc failed queue_id=%u, idx=%d",
138                                    (unsigned)rxq->queue_id, idx);
139                         bnx2x_rx_queue_release(rxq);
140                         return -ENOMEM;
141                 }
142                 rxq->sw_ring[idx] = mbuf;
143                 rxq->rx_ring[idx] = mbuf->buf_physaddr;
144         }
145         rxq->pkt_first_seg = NULL;
146         rxq->pkt_last_seg = NULL;
147         rxq->rx_bd_head = 0;
148         rxq->rx_bd_tail = rxq->nb_rx_desc;
149
150         /* Allocate CQ chain. */
151         dma_size = BNX2X_RX_CHAIN_PAGE_SZ * rxq->nb_cq_pages;
152         dma = ring_dma_zone_reserve(dev, "bnx2x_rcq", queue_idx, dma_size, socket_id);
153         if (NULL == dma) {
154                 PMD_RX_LOG(ERR, "RCQ  alloc failed");
155                 return -ENOMEM;
156         }
157         fp->rx_comp_mapping = rxq->cq_ring_phys_addr = (uint64_t)dma->phys_addr;
158         rxq->cq_ring = (union eth_rx_cqe*)dma->addr;
159
160         /* Link the CQ chain pages. */
161         for (j = 1; j <= rxq->nb_cq_pages; j++) {
162                 nextpg = &rxq->cq_ring[TOTAL_RCQ_ENTRIES_PER_PAGE * j - 1].next_page_cqe;
163                 busaddr = rxq->cq_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_cq_pages);
164                 nextpg->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
165                 nextpg->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
166         }
167         rxq->rx_cq_head = 0;
168         rxq->rx_cq_tail = TOTAL_RCQ_ENTRIES(rxq);
169
170         dev->data->rx_queues[queue_idx] = rxq;
171         if (!sc->rx_queues) sc->rx_queues = dev->data->rx_queues;
172
173         return 0;
174 }
175
176 static void
177 bnx2x_tx_queue_release(struct bnx2x_tx_queue *tx_queue)
178 {
179         uint16_t i;
180         struct rte_mbuf **sw_ring;
181
182         if (NULL != tx_queue) {
183
184                 sw_ring = tx_queue->sw_ring;
185                 if (NULL != sw_ring) {
186                         for (i = 0; i < tx_queue->nb_tx_desc; i++) {
187                                 if (NULL != sw_ring[i])
188                                         rte_pktmbuf_free(sw_ring[i]);
189                         }
190                         rte_free(sw_ring);
191                 }
192                 rte_free(tx_queue);
193         }
194 }
195
196 void
197 bnx2x_dev_tx_queue_release(void *txq)
198 {
199         bnx2x_tx_queue_release(txq);
200 }
201
202 static uint16_t
203 bnx2x_xmit_pkts(void *p_txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
204 {
205         struct bnx2x_tx_queue *txq;
206         struct bnx2x_softc *sc;
207         struct bnx2x_fastpath *fp;
208         uint16_t nb_tx_pkts;
209         uint16_t nb_pkt_sent = 0;
210         uint32_t ret;
211
212         txq = p_txq;
213         sc = txq->sc;
214         fp = &sc->fp[txq->queue_id];
215
216         if ((unlikely((txq->nb_tx_desc - txq->nb_tx_avail) >
217                                 txq->tx_free_thresh)))
218                 bnx2x_txeof(sc, fp);
219
220         nb_tx_pkts = RTE_MIN(nb_pkts, txq->nb_tx_avail / BDS_PER_TX_PKT);
221         if (unlikely(nb_tx_pkts == 0))
222                 return 0;
223
224         while (nb_tx_pkts--) {
225                 struct rte_mbuf *m = *tx_pkts++;
226                 assert(m != NULL);
227                 ret = bnx2x_tx_encap(txq, m);
228                 fp->tx_db.data.prod += ret;
229                 nb_pkt_sent++;
230         }
231
232         bnx2x_update_fp_sb_idx(fp);
233         mb();
234         DOORBELL(sc, txq->queue_id, fp->tx_db.raw);
235         mb();
236
237         if ((txq->nb_tx_desc - txq->nb_tx_avail) >
238                                 txq->tx_free_thresh)
239                 bnx2x_txeof(sc, fp);
240
241         return nb_pkt_sent;
242 }
243
244 int
245 bnx2x_dev_tx_queue_setup(struct rte_eth_dev *dev,
246                        uint16_t queue_idx,
247                        uint16_t nb_desc,
248                        unsigned int socket_id,
249                        const struct rte_eth_txconf *tx_conf)
250 {
251         uint16_t i;
252         unsigned int tsize;
253         const struct rte_memzone *tz;
254         struct bnx2x_tx_queue *txq;
255         struct eth_tx_next_bd *tx_n_bd;
256         uint64_t busaddr;
257         struct bnx2x_softc *sc = dev->data->dev_private;
258         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
259
260         /* First allocate the tx queue data structure */
261         txq = rte_zmalloc("ethdev TX queue", sizeof(struct bnx2x_tx_queue),
262                           RTE_CACHE_LINE_SIZE);
263         if (txq == NULL)
264                 return -ENOMEM;
265         txq->sc = sc;
266
267         txq->nb_tx_pages = 1;
268         while (USABLE_TX_BD(txq) < nb_desc)
269                 txq->nb_tx_pages <<= 1;
270
271         txq->nb_tx_desc  = TOTAL_TX_BD(txq);
272         sc->tx_ring_size = TOTAL_TX_BD(txq);
273
274         txq->tx_free_thresh = tx_conf->tx_free_thresh ?
275                 tx_conf->tx_free_thresh : DEFAULT_TX_FREE_THRESH;
276         txq->tx_free_thresh = min(txq->tx_free_thresh,
277                                   txq->nb_tx_desc - BDS_PER_TX_PKT);
278
279         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
280                      "total_bd=%lu, tx_pages=%u",
281                      queue_idx, nb_desc, txq->tx_free_thresh,
282                      (unsigned long)USABLE_TX_BD(txq),
283                      (unsigned long)TOTAL_TX_BD(txq), txq->nb_tx_pages);
284
285         /* Allocate TX ring hardware descriptors */
286         tsize = txq->nb_tx_desc * sizeof(union eth_tx_bd_types);
287         tz = ring_dma_zone_reserve(dev, "tx_hw_ring", queue_idx, tsize, socket_id);
288         if (tz == NULL) {
289                 bnx2x_tx_queue_release(txq);
290                 return -ENOMEM;
291         }
292         fp->tx_desc_mapping = txq->tx_ring_phys_addr = (uint64_t)tz->phys_addr;
293         txq->tx_ring = (union eth_tx_bd_types *) tz->addr;
294         memset(txq->tx_ring, 0, tsize);
295
296         /* Allocate software ring */
297         tsize = txq->nb_tx_desc * sizeof(struct rte_mbuf *);
298         txq->sw_ring = rte_zmalloc("tx_sw_ring", tsize,
299                                    RTE_CACHE_LINE_SIZE);
300         if (txq->sw_ring == NULL) {
301                 bnx2x_tx_queue_release(txq);
302                 return -ENOMEM;
303         }
304
305         /* PMD_DRV_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
306            txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr); */
307
308         /* Link TX pages */
309         for (i = 1; i <= txq->nb_tx_pages; i++) {
310                 tx_n_bd = &txq->tx_ring[TOTAL_TX_BD_PER_PAGE * i - 1].next_bd;
311                 busaddr = txq->tx_ring_phys_addr + BNX2X_PAGE_SIZE * (i % txq->nb_tx_pages);
312                 tx_n_bd->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
313                 tx_n_bd->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
314                 /* PMD_DRV_LOG(DEBUG, "link tx page %lu", (TOTAL_TX_BD_PER_PAGE * i - 1)); */
315         }
316
317         txq->queue_id = queue_idx;
318         txq->port_id = dev->data->port_id;
319         txq->tx_pkt_tail = 0;
320         txq->tx_pkt_head = 0;
321         txq->tx_bd_tail = 0;
322         txq->tx_bd_head = 0;
323         txq->nb_tx_avail = txq->nb_tx_desc;
324         dev->tx_pkt_burst = bnx2x_xmit_pkts;
325         dev->data->tx_queues[queue_idx] = txq;
326         if (!sc->tx_queues) sc->tx_queues = dev->data->tx_queues;
327
328         return 0;
329 }
330
331 static inline void
332 bnx2x_upd_rx_prod_fast(struct bnx2x_softc *sc, struct bnx2x_fastpath *fp,
333                 uint16_t rx_bd_prod, uint16_t rx_cq_prod)
334 {
335         union ustorm_eth_rx_producers rx_prods;
336
337         rx_prods.prod.bd_prod  = rx_bd_prod;
338         rx_prods.prod.cqe_prod = rx_cq_prod;
339
340         REG_WR(sc, fp->ustorm_rx_prods_offset, rx_prods.raw_data[0]);
341 }
342
343 static uint16_t
344 bnx2x_recv_pkts(void *p_rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
345 {
346         struct bnx2x_rx_queue *rxq = p_rxq;
347         struct bnx2x_softc *sc = rxq->sc;
348         struct bnx2x_fastpath *fp = &sc->fp[rxq->queue_id];
349         uint32_t nb_rx = 0;
350         uint16_t hw_cq_cons, sw_cq_cons, sw_cq_prod;
351         uint16_t bd_cons, bd_prod;
352         struct rte_mbuf *new_mb;
353         uint16_t rx_pref;
354         struct eth_fast_path_rx_cqe *cqe_fp;
355         uint16_t len, pad;
356         struct rte_mbuf *rx_mb = NULL;
357
358         hw_cq_cons = le16toh(*fp->rx_cq_cons_sb);
359         if ((hw_cq_cons & USABLE_RCQ_ENTRIES_PER_PAGE) ==
360                         USABLE_RCQ_ENTRIES_PER_PAGE) {
361                 ++hw_cq_cons;
362         }
363
364         bd_cons = rxq->rx_bd_head;
365         bd_prod = rxq->rx_bd_tail;
366         sw_cq_cons = rxq->rx_cq_head;
367         sw_cq_prod = rxq->rx_cq_tail;
368
369         if (sw_cq_cons == hw_cq_cons)
370                 return 0;
371
372         while (nb_rx < nb_pkts && sw_cq_cons != hw_cq_cons) {
373
374                 bd_prod &= MAX_RX_BD(rxq);
375                 bd_cons &= MAX_RX_BD(rxq);
376
377                 cqe_fp = &rxq->cq_ring[sw_cq_cons & MAX_RX_BD(rxq)].fast_path_cqe;
378
379                 if (unlikely(CQE_TYPE_SLOW(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_TYPE))) {
380                         PMD_RX_LOG(ERR, "slowpath event during traffic processing");
381                         break;
382                 }
383
384                 if (unlikely(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_PHY_DECODE_ERR_FLG)) {
385                         PMD_RX_LOG(ERR, "flags 0x%x rx packet %u",
386                                         cqe_fp->type_error_flags, sw_cq_cons);
387                         goto next_rx;
388                 }
389
390                 len = cqe_fp->pkt_len_or_gro_seg_len;
391                 pad = cqe_fp->placement_offset;
392
393                 new_mb = rte_mbuf_raw_alloc(rxq->mb_pool);
394                 if (unlikely(!new_mb)) {
395                         PMD_RX_LOG(ERR, "mbuf alloc fail fp[%02d]", fp->index);
396                         rte_eth_devices[rxq->port_id].data->
397                                         rx_mbuf_alloc_failed++;
398                         goto next_rx;
399                 }
400
401                 rx_mb = rxq->sw_ring[bd_cons];
402                 rxq->sw_ring[bd_cons] = new_mb;
403                 rxq->rx_ring[bd_prod] = new_mb->buf_physaddr;
404
405                 rx_pref = NEXT_RX_BD(bd_cons) & MAX_RX_BD(rxq);
406                 rte_prefetch0(rxq->sw_ring[rx_pref]);
407                 if ((rx_pref & 0x3) == 0) {
408                         rte_prefetch0(&rxq->rx_ring[rx_pref]);
409                         rte_prefetch0(&rxq->sw_ring[rx_pref]);
410                 }
411
412                 rx_mb->data_off = pad;
413                 rx_mb->nb_segs = 1;
414                 rx_mb->next = NULL;
415                 rx_mb->pkt_len = rx_mb->data_len = len;
416                 rx_mb->port = rxq->port_id;
417                 rte_prefetch1(rte_pktmbuf_mtod(rx_mb, void *));
418
419                 /*
420                  * If we received a packet with a vlan tag,
421                  * attach that information to the packet.
422                  */
423                 if (cqe_fp->pars_flags.flags & PARSING_FLAGS_VLAN) {
424                         rx_mb->vlan_tci = cqe_fp->vlan_tag;
425                         rx_mb->ol_flags |= PKT_RX_VLAN_PKT;
426                 }
427
428                 rx_pkts[nb_rx] = rx_mb;
429                 nb_rx++;
430
431                 /* limit spinning on the queue */
432                 if (unlikely(nb_rx == sc->rx_budget)) {
433                         PMD_RX_LOG(ERR, "Limit spinning on the queue");
434                         break;
435                 }
436
437 next_rx:
438                 bd_cons    = NEXT_RX_BD(bd_cons);
439                 bd_prod    = NEXT_RX_BD(bd_prod);
440                 sw_cq_prod = NEXT_RCQ_IDX(sw_cq_prod);
441                 sw_cq_cons = NEXT_RCQ_IDX(sw_cq_cons);
442         }
443         rxq->rx_bd_head = bd_cons;
444         rxq->rx_bd_tail = bd_prod;
445         rxq->rx_cq_head = sw_cq_cons;
446         rxq->rx_cq_tail = sw_cq_prod;
447
448         bnx2x_upd_rx_prod_fast(sc, fp, bd_prod, sw_cq_prod);
449
450         return nb_rx;
451 }
452
453 int
454 bnx2x_dev_rx_init(struct rte_eth_dev *dev)
455 {
456         dev->rx_pkt_burst = bnx2x_recv_pkts;
457
458         return 0;
459 }
460
461 void
462 bnx2x_dev_clear_queues(struct rte_eth_dev *dev)
463 {
464         uint8_t i;
465
466         PMD_INIT_FUNC_TRACE();
467
468         for (i = 0; i < dev->data->nb_tx_queues; i++) {
469                 struct bnx2x_tx_queue *txq = dev->data->tx_queues[i];
470                 if (txq != NULL) {
471                         bnx2x_tx_queue_release(txq);
472                         dev->data->tx_queues[i] = NULL;
473                 }
474         }
475
476         for (i = 0; i < dev->data->nb_rx_queues; i++) {
477                 struct bnx2x_rx_queue *rxq = dev->data->rx_queues[i];
478                 if (rxq != NULL) {
479                         bnx2x_rx_queue_release(rxq);
480                         dev->data->rx_queues[i] = NULL;
481                 }
482         }
483 }