2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2015-2020 Amazon.com, Inc. or its affiliates.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
36 #include "ena_netmap.h"
38 #define ENA_NETMAP_MORE_FRAMES 1
39 #define ENA_NETMAP_NO_MORE_FRAMES 0
40 #define ENA_MAX_FRAMES 16384
42 struct ena_netmap_ctx {
43 struct netmap_kring *kring;
44 struct ena_adapter *adapter;
45 struct netmap_adapter *na;
46 struct netmap_slot *slots;
47 struct ena_ring *ring;
48 struct ena_com_io_cq *io_cq;
49 struct ena_com_io_sq *io_sq;
55 /* Netmap callbacks */
56 static int ena_netmap_reg(struct netmap_adapter *, int);
57 static int ena_netmap_txsync(struct netmap_kring *, int);
58 static int ena_netmap_rxsync(struct netmap_kring *, int);
60 /* Helper functions */
61 static int ena_netmap_tx_frames(struct ena_netmap_ctx *);
62 static int ena_netmap_tx_frame(struct ena_netmap_ctx *);
63 static inline uint16_t ena_netmap_count_slots(struct ena_netmap_ctx *);
64 static inline uint16_t ena_netmap_packet_len(struct netmap_slot *, u_int,
66 static int ena_netmap_copy_data(struct netmap_adapter *,
67 struct netmap_slot *, u_int, uint16_t, uint16_t, void *);
68 static int ena_netmap_map_single_slot(struct netmap_adapter *,
69 struct netmap_slot *, bus_dma_tag_t, bus_dmamap_t, void **, uint64_t *);
70 static int ena_netmap_tx_map_slots(struct ena_netmap_ctx *,
71 struct ena_tx_buffer *, void **, uint16_t *, uint16_t *);
72 static void ena_netmap_unmap_last_socket_chain(struct ena_netmap_ctx *,
73 struct ena_tx_buffer *);
74 static void ena_netmap_tx_cleanup(struct ena_netmap_ctx *);
75 static uint16_t ena_netmap_tx_clean_one(struct ena_netmap_ctx *,
77 static inline int validate_tx_req_id(struct ena_ring *, uint16_t);
78 static int ena_netmap_rx_frames(struct ena_netmap_ctx *);
79 static int ena_netmap_rx_frame(struct ena_netmap_ctx *);
80 static int ena_netmap_rx_load_desc(struct ena_netmap_ctx *, uint16_t,
82 static void ena_netmap_rx_cleanup(struct ena_netmap_ctx *);
83 static void ena_netmap_fill_ctx(struct netmap_kring *,
84 struct ena_netmap_ctx *, uint16_t);
87 ena_netmap_attach(struct ena_adapter *adapter)
89 struct netmap_adapter na;
91 ena_trace(NULL, ENA_NETMAP, "netmap attach\n");
93 bzero(&na, sizeof(na));
94 na.na_flags = NAF_MOREFRAG;
95 na.ifp = adapter->ifp;
96 na.num_tx_desc = adapter->requested_tx_ring_size;
97 na.num_rx_desc = adapter->requested_rx_ring_size;
98 na.num_tx_rings = adapter->num_io_queues;
99 na.num_rx_rings = adapter->num_io_queues;
100 na.rx_buf_maxsize = adapter->buf_ring_size;
101 na.nm_txsync = ena_netmap_txsync;
102 na.nm_rxsync = ena_netmap_rxsync;
103 na.nm_register = ena_netmap_reg;
105 return (netmap_attach(&na));
109 ena_netmap_alloc_rx_slot(struct ena_adapter *adapter,
110 struct ena_ring *rx_ring, struct ena_rx_buffer *rx_info)
112 struct netmap_adapter *na = NA(adapter->ifp);
113 struct netmap_kring *kring;
114 struct netmap_ring *ring;
115 struct netmap_slot *slot;
118 int nm_i, qid, head, lim, rc;
120 /* if previously allocated frag is not used */
121 if (unlikely(rx_info->netmap_buf_idx != 0))
125 kring = na->rx_rings[qid];
126 nm_i = kring->nr_hwcur;
129 ena_trace(NULL, ENA_NETMAP | ENA_DBG, "nr_hwcur: %d, nr_hwtail: %d, "
130 "rhead: %d, rcur: %d, rtail: %d\n", kring->nr_hwcur,
131 kring->nr_hwtail, kring->rhead, kring->rcur, kring->rtail);
133 if ((nm_i == head) && rx_ring->initialized) {
134 ena_trace(NULL, ENA_NETMAP, "No free slots in netmap ring\n");
140 device_printf(adapter->pdev, "Rx ring %d is NULL\n", qid);
143 slot = &ring->slot[nm_i];
145 addr = PNMB(na, slot, &paddr);
146 if (addr == NETMAP_BUF_BASE(na)) {
147 device_printf(adapter->pdev, "Bad buff in slot\n");
151 rc = netmap_load_map(na, adapter->rx_buf_tag, rx_info->map, addr);
153 ena_trace(NULL, ENA_WARNING, "DMA mapping error\n");
156 bus_dmamap_sync(adapter->rx_buf_tag, rx_info->map, BUS_DMASYNC_PREREAD);
158 rx_info->ena_buf.paddr = paddr;
159 rx_info->ena_buf.len = ring->nr_buf_size;
160 rx_info->mbuf = NULL;
161 rx_info->netmap_buf_idx = slot->buf_idx;
165 lim = kring->nkr_num_slots - 1;
166 kring->nr_hwcur = nm_next(nm_i, lim);
172 ena_netmap_free_rx_slot(struct ena_adapter *adapter,
173 struct ena_ring *rx_ring, struct ena_rx_buffer *rx_info)
175 struct netmap_adapter *na;
176 struct netmap_kring *kring;
177 struct netmap_slot *slot;
180 na = NA(adapter->ifp);
182 device_printf(adapter->pdev, "netmap adapter is NULL\n");
186 if (na->rx_rings == NULL) {
187 device_printf(adapter->pdev, "netmap rings are NULL\n");
192 kring = na->rx_rings[qid];
194 device_printf(adapter->pdev,
195 "netmap kernel ring %d is NULL\n", qid);
199 lim = kring->nkr_num_slots - 1;
200 nm_i = nm_prev(kring->nr_hwcur, lim);
202 if (kring->nr_mode != NKR_NETMAP_ON)
205 bus_dmamap_sync(adapter->rx_buf_tag, rx_info->map,
206 BUS_DMASYNC_POSTREAD);
207 netmap_unload_map(na, adapter->rx_buf_tag, rx_info->map);
209 KASSERT(kring->ring == NULL, ("Netmap Rx ring is NULL\n"));
211 slot = &kring->ring->slot[nm_i];
213 ENA_WARN(slot->buf_idx != 0, NULL, "Overwrite slot buf\n");
214 slot->buf_idx = rx_info->netmap_buf_idx;
215 slot->flags = NS_BUF_CHANGED;
217 rx_info->netmap_buf_idx = 0;
218 kring->nr_hwcur = nm_i;
222 ena_ring_in_netmap(struct ena_adapter *adapter, int qid, enum txrx x)
224 struct netmap_adapter *na;
225 struct netmap_kring *kring;
227 if (adapter->ifp->if_capenable & IFCAP_NETMAP) {
228 na = NA(adapter->ifp);
229 kring = (x == NR_RX) ? na->rx_rings[qid] : na->tx_rings[qid];
230 if (kring->nr_mode == NKR_NETMAP_ON)
237 ena_tx_ring_in_netmap(struct ena_adapter *adapter, int qid)
239 return ena_ring_in_netmap(adapter, qid, NR_TX);
243 ena_rx_ring_in_netmap(struct ena_adapter *adapter, int qid)
245 return ena_ring_in_netmap(adapter, qid, NR_RX);
249 ena_netmap_reset_ring(struct ena_adapter *adapter, int qid, enum txrx x)
251 if (!ena_ring_in_netmap(adapter, qid, x))
254 netmap_reset(NA(adapter->ifp), x, qid, 0);
255 ena_trace(NULL, ENA_NETMAP, "%s ring %d is in netmap mode\n",
256 (x == NR_TX) ? "Tx" : "Rx", qid);
260 ena_netmap_reset_rx_ring(struct ena_adapter *adapter, int qid)
262 ena_netmap_reset_ring(adapter, qid, NR_RX);
266 ena_netmap_reset_tx_ring(struct ena_adapter *adapter, int qid)
268 ena_netmap_reset_ring(adapter, qid, NR_TX);
272 ena_netmap_reg(struct netmap_adapter *na, int onoff)
274 struct ifnet *ifp = na->ifp;
275 struct ena_adapter* adapter = ifp->if_softc;
276 struct netmap_kring *kring;
280 ENA_LOCK_LOCK(adapter);
281 ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_TRIGGER_RESET, adapter);
285 ena_trace(NULL, ENA_NETMAP, "netmap on\n");
287 for (i = 0; i <= nma_get_nrings(na, t); i++) {
288 kring = NMR(na, t)[i];
289 if (nm_kring_pending_on(kring)) {
290 kring->nr_mode = NKR_NETMAP_ON;
294 nm_set_native_flags(na);
296 ena_trace(NULL, ENA_NETMAP, "netmap off\n");
297 nm_clear_native_flags(na);
299 for (i = 0; i <= nma_get_nrings(na, t); i++) {
300 kring = NMR(na, t)[i];
301 if (nm_kring_pending_off(kring)) {
302 kring->nr_mode = NKR_NETMAP_OFF;
308 rc = ena_up(adapter);
310 ena_trace(NULL, ENA_WARNING, "ena_up failed with rc=%d\n", rc);
311 adapter->reset_reason = ENA_REGS_RESET_DRIVER_INVALID_STATE;
312 nm_clear_native_flags(na);
313 ena_destroy_device(adapter, false);
314 ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEV_UP_BEFORE_RESET, adapter);
315 rc = ena_restore_device(adapter);
317 ENA_LOCK_UNLOCK(adapter);
323 ena_netmap_txsync(struct netmap_kring *kring, int flags)
325 struct ena_netmap_ctx ctx;
328 ena_netmap_fill_ctx(kring, &ctx, ENA_IO_TXQ_IDX(kring->ring_id));
329 ctx.ring = &ctx.adapter->tx_ring[kring->ring_id];
331 ENA_RING_MTX_LOCK(ctx.ring);
332 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, ctx.adapter)))
335 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_LINK_UP, ctx.adapter)))
338 rc = ena_netmap_tx_frames(&ctx);
339 ena_netmap_tx_cleanup(&ctx);
342 ENA_RING_MTX_UNLOCK(ctx.ring);
347 ena_netmap_tx_frames(struct ena_netmap_ctx *ctx)
349 struct ena_ring *tx_ring = ctx->ring;
352 ctx->nm_i = ctx->kring->nr_hwcur;
353 ctx->nt = ctx->ring->next_to_use;
355 __builtin_prefetch(&ctx->slots[ctx->nm_i]);
357 while (ctx->nm_i != ctx->kring->rhead) {
358 if ((rc = ena_netmap_tx_frame(ctx)) != 0) {
360 * When there is no empty space in Tx ring, error is
361 * still being returned. It should not be passed to the
362 * netmap, as application knows current ring state from
363 * netmap ring pointers. Returning error there could
364 * cause application to exit, but the Tx ring is commonly
367 if (rc == ENA_COM_NO_MEM)
371 tx_ring->acum_pkts++;
374 /* If any packet was sent... */
375 if (likely(ctx->nm_i != ctx->kring->nr_hwcur)) {
376 /* ...send the doorbell to the device. */
377 ena_com_write_sq_doorbell(ctx->io_sq);
378 counter_u64_add(ctx->ring->tx_stats.doorbells, 1);
379 tx_ring->acum_pkts = 0;
381 ctx->ring->next_to_use = ctx->nt;
382 ctx->kring->nr_hwcur = ctx->nm_i;
389 ena_netmap_tx_frame(struct ena_netmap_ctx *ctx)
391 struct ena_com_tx_ctx ena_tx_ctx;
392 struct ena_adapter *adapter;
393 struct ena_ring *tx_ring;
394 struct ena_tx_buffer *tx_info;
402 adapter = ctx->adapter;
403 if (ena_netmap_count_slots(ctx) > adapter->max_tx_sgl_size) {
404 ena_trace(NULL, ENA_WARNING, "Too many slots per packet\n");
410 req_id = tx_ring->free_tx_ids[ctx->nt];
411 tx_info = &tx_ring->tx_buffer_info[req_id];
412 tx_info->num_of_bufs = 0;
413 tx_info->nm_info.sockets_used = 0;
415 rc = ena_netmap_tx_map_slots(ctx, tx_info, &push_hdr, &header_len,
417 if (unlikely(rc != 0)) {
418 device_printf(adapter->pdev, "Failed to map Tx slot\n");
422 bzero(&ena_tx_ctx, sizeof(struct ena_com_tx_ctx));
423 ena_tx_ctx.ena_bufs = tx_info->bufs;
424 ena_tx_ctx.push_header = push_hdr;
425 ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
426 ena_tx_ctx.req_id = req_id;
427 ena_tx_ctx.header_len = header_len;
429 /* There are no any offloads, as the netmap doesn't support them */
431 if (tx_ring->acum_pkts == DB_THRESHOLD ||
432 ena_com_is_doorbell_needed(ctx->io_sq, &ena_tx_ctx)) {
433 ena_com_write_sq_doorbell(ctx->io_sq);
434 counter_u64_add(tx_ring->tx_stats.doorbells, 1);
435 tx_ring->acum_pkts = 0;
438 rc = ena_com_prepare_tx(ctx->io_sq, &ena_tx_ctx, &nb_hw_desc);
439 if (unlikely(rc != 0)) {
440 if (likely(rc == ENA_COM_NO_MEM)) {
441 ena_trace(NULL, ENA_NETMAP | ENA_DBG | ENA_TXPTH,
442 "Tx ring[%d] is out of space\n", tx_ring->que->id);
444 device_printf(adapter->pdev,
445 "Failed to prepare Tx bufs\n");
447 counter_u64_add(tx_ring->tx_stats.prepare_ctx_err, 1);
449 ena_netmap_unmap_last_socket_chain(ctx, tx_info);
454 counter_u64_add_protected(tx_ring->tx_stats.cnt, 1);
455 counter_u64_add_protected(tx_ring->tx_stats.bytes, packet_len);
456 counter_u64_add_protected(adapter->hw_stats.tx_packets, 1);
457 counter_u64_add_protected(adapter->hw_stats.tx_bytes, packet_len);
460 tx_info->tx_descs = nb_hw_desc;
462 ctx->nt = ENA_TX_RING_IDX_NEXT(ctx->nt, ctx->ring->ring_size);
464 for (unsigned int i = 0; i < tx_info->num_of_bufs; i++)
465 bus_dmamap_sync(adapter->tx_buf_tag,
466 tx_info->nm_info.map_seg[i], BUS_DMASYNC_PREWRITE);
471 static inline uint16_t
472 ena_netmap_count_slots(struct ena_netmap_ctx *ctx)
475 uint16_t nm = ctx->nm_i;
477 while ((ctx->slots[nm].flags & NS_MOREFRAG) != 0) {
479 nm = nm_next(nm, ctx->lim);
485 static inline uint16_t
486 ena_netmap_packet_len(struct netmap_slot *slots, u_int slot_index,
489 struct netmap_slot *nm_slot;
490 uint16_t packet_size = 0;
493 nm_slot = &slots[slot_index];
494 packet_size += nm_slot->len;
495 slot_index = nm_next(slot_index, limit);
496 } while ((nm_slot->flags & NS_MOREFRAG) != 0);
502 ena_netmap_copy_data(struct netmap_adapter *na, struct netmap_slot *slots,
503 u_int slot_index, uint16_t limit, uint16_t bytes_to_copy, void *destination)
505 struct netmap_slot *nm_slot;
507 uint16_t packet_size;
508 uint16_t data_amount;
512 nm_slot = &slots[slot_index];
513 slot_vaddr = NMB(na, nm_slot);
514 if (unlikely(slot_vaddr == NULL))
517 data_amount = min_t(uint16_t, bytes_to_copy, nm_slot->len);
518 memcpy(destination, slot_vaddr, data_amount);
519 bytes_to_copy -= data_amount;
521 slot_index = nm_next(slot_index, limit);
522 } while ((nm_slot->flags & NS_MOREFRAG) != 0 && bytes_to_copy > 0);
528 ena_netmap_map_single_slot(struct netmap_adapter *na, struct netmap_slot *slot,
529 bus_dma_tag_t dmatag, bus_dmamap_t dmamap, void **vaddr, uint64_t *paddr)
533 *vaddr = PNMB(na, slot, paddr);
534 if (unlikely(vaddr == NULL)) {
535 ena_trace(NULL, ENA_ALERT, "Slot address is NULL\n");
539 rc = netmap_load_map(na, dmatag, dmamap, *vaddr);
540 if (unlikely(rc != 0)) {
541 ena_trace(NULL, ENA_ALERT, "Failed to map slot %d for DMA\n",
550 ena_netmap_tx_map_slots(struct ena_netmap_ctx *ctx,
551 struct ena_tx_buffer *tx_info, void **push_hdr, uint16_t *header_len,
552 uint16_t *packet_len)
554 struct netmap_slot *slot;
555 struct ena_com_buf *ena_buf;
556 struct ena_adapter *adapter;
557 struct ena_ring *tx_ring;
558 struct ena_netmap_tx_info *nm_info;
559 bus_dmamap_t *nm_maps;
562 uint32_t *nm_buf_idx;
563 uint32_t slot_head_len;
565 uint32_t remaining_len;
570 adapter = ctx->adapter;
572 ena_buf = tx_info->bufs;
573 nm_info = &tx_info->nm_info;
574 nm_maps = nm_info->map_seg;
575 nm_buf_idx = nm_info->socket_buf_idx;
576 slot = &ctx->slots[ctx->nm_i];
578 slot_head_len = slot->len;
579 *packet_len = ena_netmap_packet_len(ctx->slots, ctx->nm_i, ctx->lim);
580 remaining_len = *packet_len;
583 __builtin_prefetch(&ctx->slots[ctx->nm_i + 1]);
584 if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
586 * When the device is in LLQ mode, the driver will copy
587 * the header into the device memory space.
588 * The ena_com layer assumes that the header is in a linear
590 * This assumption might be wrong since part of the header
591 * can be in the fragmented buffers.
592 * First, check if header fits in the first slot. If not, copy
593 * it to separate buffer that will be holding linearized data.
595 push_len = min_t(uint32_t, *packet_len,
596 tx_ring->tx_max_header_size);
597 *header_len = push_len;
598 /* If header is in linear space, just point to socket's data. */
599 if (likely(push_len <= slot_head_len)) {
600 *push_hdr = NMB(ctx->na, slot);
601 if (unlikely(push_hdr == NULL)) {
602 device_printf(adapter->pdev,
603 "Slot vaddress is NULL\n");
607 * Otherwise, copy whole portion of header from multiple slots
608 * to intermediate buffer.
611 rc = ena_netmap_copy_data(ctx->na,
616 tx_ring->push_buf_intermediate_buf);
618 device_printf(adapter->pdev,
619 "Failed to copy data from slots to push_buf\n");
623 *push_hdr = tx_ring->push_buf_intermediate_buf;
624 counter_u64_add(tx_ring->tx_stats.llq_buffer_copy, 1);
626 delta = push_len - slot_head_len;
629 ena_trace(NULL, ENA_NETMAP | ENA_DBG | ENA_TXPTH,
630 "slot: %d header_buf->vaddr: %p push_len: %d\n",
631 slot->buf_idx, *push_hdr, push_len);
634 * If header was in linear memory space, map for the dma rest of the data
635 * in the first mbuf of the mbuf chain.
637 if (slot_head_len > push_len) {
638 rc = ena_netmap_map_single_slot(ctx->na,
644 if (unlikely(rc != 0)) {
645 device_printf(adapter->pdev,
646 "DMA mapping error\n");
651 ena_buf->paddr = paddr + push_len;
652 ena_buf->len = slot->len - push_len;
655 tx_info->num_of_bufs++;
658 remaining_len -= slot->len;
660 /* Save buf idx before advancing */
661 *nm_buf_idx = slot->buf_idx;
665 /* Advance to the next socket */
666 ctx->nm_i = nm_next(ctx->nm_i, ctx->lim);
667 slot = &ctx->slots[ctx->nm_i];
668 nm_info->sockets_used++;
671 * If header is in non linear space (delta > 0), then skip mbufs
672 * containing header and map the last one containing both header
673 * and the packet data.
674 * The first segment is already counted in.
677 __builtin_prefetch(&ctx->slots[ctx->nm_i + 1]);
678 frag_len = slot->len;
681 * If whole segment contains header just move to the
682 * next one and reduce delta.
684 if (unlikely(delta >= frag_len)) {
688 * Map the data and then assign it with the
691 rc = ena_netmap_map_single_slot(ctx->na,
697 if (unlikely(rc != 0)) {
698 device_printf(adapter->pdev,
699 "DMA mapping error\n");
704 ena_buf->paddr = paddr + delta;
705 ena_buf->len = slot->len - delta;
708 tx_info->num_of_bufs++;
712 remaining_len -= slot->len;
714 /* Save buf idx before advancing */
715 *nm_buf_idx = slot->buf_idx;
719 /* Advance to the next socket */
720 ctx->nm_i = nm_next(ctx->nm_i, ctx->lim);
721 slot = &ctx->slots[ctx->nm_i];
722 nm_info->sockets_used++;
727 * header_len is just a hint for the device. Because netmap is
728 * not giving us any information about packet header length and
729 * it is not guaranteed that all packet headers will be in the
730 * 1st slot, setting header_len to 0 is making the device ignore
731 * this value and resolve header on it's own.
736 /* Map all remaining data (regular routine for non-LLQ mode) */
737 while (remaining_len > 0) {
738 __builtin_prefetch(&ctx->slots[ctx->nm_i + 1]);
740 rc = ena_netmap_map_single_slot(ctx->na,
746 if (unlikely(rc != 0)) {
747 device_printf(adapter->pdev,
748 "DMA mapping error\n");
753 ena_buf->paddr = paddr;
754 ena_buf->len = slot->len;
757 tx_info->num_of_bufs++;
759 remaining_len -= slot->len;
761 /* Save buf idx before advancing */
762 *nm_buf_idx = slot->buf_idx;
766 /* Advance to the next socket */
767 ctx->nm_i = nm_next(ctx->nm_i, ctx->lim);
768 slot = &ctx->slots[ctx->nm_i];
769 nm_info->sockets_used++;
775 ena_netmap_unmap_last_socket_chain(ctx, tx_info);
781 ena_netmap_unmap_last_socket_chain(struct ena_netmap_ctx *ctx,
782 struct ena_tx_buffer *tx_info)
784 struct ena_netmap_tx_info *nm_info;
787 nm_info = &tx_info->nm_info;
790 * As the used sockets must not be equal to the buffers used in the LLQ
791 * mode, they must be treated separately.
792 * First, unmap the DMA maps.
794 n = tx_info->num_of_bufs;
796 netmap_unload_map(ctx->na, ctx->adapter->tx_buf_tag,
797 nm_info->map_seg[n]);
799 tx_info->num_of_bufs = 0;
801 /* Next, retain the sockets back to the userspace */
802 n = nm_info->sockets_used;
804 ctx->slots[ctx->nm_i].buf_idx = nm_info->socket_buf_idx[n];
805 ctx->slots[ctx->nm_i].flags = NS_BUF_CHANGED;
806 nm_info->socket_buf_idx[n] = 0;
807 ctx->nm_i = nm_prev(ctx->nm_i, ctx->lim);
809 nm_info->sockets_used = 0;
813 ena_netmap_tx_cleanup(struct ena_netmap_ctx *ctx)
816 uint16_t total_tx_descs = 0;
818 ctx->nm_i = ctx->kring->nr_hwtail;
819 ctx->nt = ctx->ring->next_to_clean;
821 /* Reclaim buffers for completed transmissions */
822 while (ena_com_tx_comp_req_id_get(ctx->io_cq, &req_id) >= 0) {
823 if (validate_tx_req_id(ctx->ring, req_id) != 0)
825 total_tx_descs += ena_netmap_tx_clean_one(ctx, req_id);
828 ctx->kring->nr_hwtail = ctx->nm_i;
830 if (total_tx_descs > 0) {
831 /* acknowledge completion of sent packets */
832 ctx->ring->next_to_clean = ctx->nt;
833 ena_com_comp_ack(ctx->ring->ena_com_io_sq, total_tx_descs);
834 ena_com_update_dev_comp_head(ctx->ring->ena_com_io_cq);
839 ena_netmap_tx_clean_one(struct ena_netmap_ctx *ctx, uint16_t req_id)
841 struct ena_tx_buffer *tx_info;
842 struct ena_netmap_tx_info *nm_info;
845 tx_info = &ctx->ring->tx_buffer_info[req_id];
846 nm_info = &tx_info->nm_info;
849 * As the used sockets must not be equal to the buffers used in the LLQ
850 * mode, they must be treated separately.
851 * First, unmap the DMA maps.
853 n = tx_info->num_of_bufs;
854 for (n = 0; n < tx_info->num_of_bufs; n++) {
855 netmap_unload_map(ctx->na, ctx->adapter->tx_buf_tag,
856 nm_info->map_seg[n]);
858 tx_info->num_of_bufs = 0;
860 /* Next, retain the sockets back to the userspace */
861 for (n = 0; n < nm_info->sockets_used; n++) {
862 ctx->nm_i = nm_next(ctx->nm_i, ctx->lim);
863 ENA_WARN(ctx->slots[ctx->nm_i].buf_idx != 0, NULL,
864 "Tx idx is not 0.\n");
865 ctx->slots[ctx->nm_i].buf_idx = nm_info->socket_buf_idx[n];
866 ctx->slots[ctx->nm_i].flags = NS_BUF_CHANGED;
867 nm_info->socket_buf_idx[n] = 0;
869 nm_info->sockets_used = 0;
871 ctx->ring->free_tx_ids[ctx->nt] = req_id;
872 ctx->nt = ENA_TX_RING_IDX_NEXT(ctx->nt, ctx->lim);
874 return tx_info->tx_descs;
878 validate_tx_req_id(struct ena_ring *tx_ring, uint16_t req_id)
880 struct ena_adapter *adapter = tx_ring->adapter;
882 if (likely(req_id < tx_ring->ring_size))
885 ena_trace(NULL, ENA_WARNING, "Invalid req_id: %hu\n", req_id);
886 counter_u64_add(tx_ring->tx_stats.bad_req_id, 1);
888 ena_trigger_reset(adapter, ENA_REGS_RESET_INV_TX_REQ_ID);
894 ena_netmap_rxsync(struct netmap_kring *kring, int flags)
896 struct ena_netmap_ctx ctx;
899 ena_netmap_fill_ctx(kring, &ctx, ENA_IO_RXQ_IDX(kring->ring_id));
900 ctx.ring = &ctx.adapter->rx_ring[kring->ring_id];
902 if (ctx.kring->rhead > ctx.lim) {
903 /* Probably not needed to release slots from RX ring. */
904 return (netmap_ring_reinit(ctx.kring));
907 if (unlikely((if_getdrvflags(ctx.na->ifp) & IFF_DRV_RUNNING) == 0))
910 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_LINK_UP, ctx.adapter)))
913 if ((rc = ena_netmap_rx_frames(&ctx)) != 0)
916 ena_netmap_rx_cleanup(&ctx);
922 ena_netmap_rx_frames(struct ena_netmap_ctx *ctx)
925 int frames_counter = 0;
927 ctx->nt = ctx->ring->next_to_clean;
928 ctx->nm_i = ctx->kring->nr_hwtail;
930 while((rc = ena_netmap_rx_frame(ctx)) == ENA_NETMAP_MORE_FRAMES) {
932 /* In case of multiple frames, it is not an error. */
934 if (frames_counter > ENA_MAX_FRAMES) {
935 device_printf(ctx->adapter->pdev,
936 "Driver is stuck in the Rx loop\n");
941 ctx->kring->nr_hwtail = ctx->nm_i;
942 ctx->kring->nr_kflags &= ~NKR_PENDINTR;
943 ctx->ring->next_to_clean = ctx->nt;
949 ena_netmap_rx_frame(struct ena_netmap_ctx *ctx)
951 struct ena_com_rx_ctx ena_rx_ctx;
952 enum ena_regs_reset_reason_types reset_reason;
956 ena_rx_ctx.ena_bufs = ctx->ring->ena_bufs;
957 ena_rx_ctx.max_bufs = ctx->adapter->max_rx_sgl_size;
958 bus_dmamap_sync(ctx->io_cq->cdesc_addr.mem_handle.tag,
959 ctx->io_cq->cdesc_addr.mem_handle.map, BUS_DMASYNC_POSTREAD);
961 rc = ena_com_rx_pkt(ctx->io_cq, ctx->io_sq, &ena_rx_ctx);
962 if (unlikely(rc != 0)) {
963 ena_trace(NULL, ENA_ALERT,
964 "Failed to read pkt from the device with error: %d\n", rc);
965 if (rc == ENA_COM_NO_SPACE) {
966 counter_u64_add(ctx->ring->rx_stats.bad_desc_num, 1);
967 reset_reason = ENA_REGS_RESET_TOO_MANY_RX_DESCS;
969 counter_u64_add(ctx->ring->rx_stats.bad_req_id, 1);
970 reset_reason = ENA_REGS_RESET_INV_RX_REQ_ID;
972 ena_trigger_reset(ctx->adapter, reset_reason);
975 if (unlikely(ena_rx_ctx.descs == 0))
976 return (ENA_NETMAP_NO_MORE_FRAMES);
978 ena_trace(NULL, ENA_NETMAP | ENA_DBG, "Rx: q %d got packet from ena. descs #:"
979 " %d l3 proto %d l4 proto %d hash: %x\n", ctx->ring->qid,
980 ena_rx_ctx.descs, ena_rx_ctx.l3_proto, ena_rx_ctx.l4_proto,
983 for (buf = 0; buf < ena_rx_ctx.descs; buf++)
984 if ((rc = ena_netmap_rx_load_desc(ctx, buf, &len)) != 0)
987 * ena_netmap_rx_load_desc doesn't know the number of descriptors.
988 * It just set flag NS_MOREFRAG to all slots, then here flag of
989 * last slot is cleared.
991 ctx->slots[nm_prev(ctx->nm_i, ctx->lim)].flags = NS_BUF_CHANGED;
997 bus_dmamap_sync(ctx->io_cq->cdesc_addr.mem_handle.tag,
998 ctx->io_cq->cdesc_addr.mem_handle.map, BUS_DMASYNC_PREREAD);
1001 counter_u64_add_protected(ctx->ring->rx_stats.bytes, len);
1002 counter_u64_add_protected(ctx->adapter->hw_stats.rx_bytes, len);
1003 counter_u64_add_protected(ctx->ring->rx_stats.cnt, 1);
1004 counter_u64_add_protected(ctx->adapter->hw_stats.rx_packets, 1);
1007 return (ENA_NETMAP_MORE_FRAMES);
1012 /* Remove failed packet from ring */
1014 ctx->slots[nm].flags = 0;
1015 ctx->slots[nm].len = 0;
1016 nm = nm_prev(nm, ctx->lim);
1023 ena_netmap_rx_load_desc(struct ena_netmap_ctx *ctx, uint16_t buf, int *len)
1025 struct ena_rx_buffer *rx_info;
1028 req_id = ctx->ring->ena_bufs[buf].req_id;
1029 rx_info = &ctx->ring->rx_buffer_info[req_id];
1030 bus_dmamap_sync(ctx->adapter->rx_buf_tag, rx_info->map,
1031 BUS_DMASYNC_POSTREAD);
1032 netmap_unload_map(ctx->na, ctx->adapter->rx_buf_tag, rx_info->map);
1034 ENA_WARN(ctx->slots[ctx->nm_i].buf_idx != 0, NULL,
1035 "Rx idx is not 0.\n");
1037 ctx->slots[ctx->nm_i].buf_idx = rx_info->netmap_buf_idx;
1038 rx_info->netmap_buf_idx = 0;
1040 * Set NS_MOREFRAG to all slots.
1041 * Then ena_netmap_rx_frame clears it from last one.
1043 ctx->slots[ctx->nm_i].flags |= NS_MOREFRAG | NS_BUF_CHANGED;
1044 ctx->slots[ctx->nm_i].len = ctx->ring->ena_bufs[buf].len;
1045 *len += ctx->slots[ctx->nm_i].len;
1046 ctx->ring->free_rx_ids[ctx->nt] = req_id;
1047 ena_trace(NULL, ENA_DBG, "rx_info %p, buf_idx %d, paddr %jx, nm: %d\n",
1048 rx_info, ctx->slots[ctx->nm_i].buf_idx,
1049 (uintmax_t)rx_info->ena_buf.paddr, ctx->nm_i);
1051 ctx->nm_i = nm_next(ctx->nm_i, ctx->lim);
1052 ctx->nt = ENA_RX_RING_IDX_NEXT(ctx->nt, ctx->ring->ring_size);
1058 ena_netmap_rx_cleanup(struct ena_netmap_ctx *ctx)
1060 int refill_required;
1062 refill_required = ctx->kring->rhead - ctx->kring->nr_hwcur;
1063 if (ctx->kring->nr_hwcur != ctx->kring->nr_hwtail)
1064 refill_required -= 1;
1066 if (refill_required == 0)
1068 else if (refill_required < 0)
1069 refill_required += ctx->kring->nkr_num_slots;
1071 ena_refill_rx_bufs(ctx->ring, refill_required);
1075 ena_netmap_fill_ctx(struct netmap_kring *kring, struct ena_netmap_ctx *ctx,
1079 ctx->na = kring->na;
1080 ctx->adapter = ctx->na->ifp->if_softc;
1081 ctx->lim = kring->nkr_num_slots - 1;
1082 ctx->io_cq = &ctx->adapter->ena_dev->io_cq_queues[ena_qid];
1083 ctx->io_sq = &ctx->adapter->ena_dev->io_sq_queues[ena_qid];
1084 ctx->slots = kring->ring->slot;
1088 ena_netmap_unload(struct ena_adapter *adapter, bus_dmamap_t map)
1090 struct netmap_adapter *na = NA(adapter->ifp);
1092 netmap_unload_map(na, adapter->tx_buf_tag, map);
1095 #endif /* DEV_NETMAP */