1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
3 * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8 #ifdef CONFIG_RFS_ACCEL
9 #include <linux/cpu_rmap.h>
10 #endif /* CONFIG_RFS_ACCEL */
11 #include <linux/ethtool.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/numa.h>
15 #include <linux/pci.h>
16 #include <linux/utsname.h>
17 #include <linux/version.h>
18 #include <linux/vmalloc.h>
21 #include "ena_netdev.h"
22 #include <linux/bpf_trace.h>
23 #include "ena_pci_id_tbl.h"
25 MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
26 MODULE_DESCRIPTION(DEVICE_NAME);
27 MODULE_LICENSE("GPL");
29 /* Time in jiffies before concluding the transmitter is hung. */
30 #define TX_TIMEOUT (5 * HZ)
32 #define ENA_MAX_RINGS min_t(unsigned int, ENA_MAX_NUM_IO_QUEUES, num_possible_cpus())
34 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_IFUP | \
35 NETIF_MSG_TX_DONE | NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR)
37 static struct ena_aenq_handlers aenq_handlers;
39 static struct workqueue_struct *ena_wq;
41 MODULE_DEVICE_TABLE(pci, ena_pci_tbl);
43 static int ena_rss_init_default(struct ena_adapter *adapter);
44 static void check_for_admin_com_state(struct ena_adapter *adapter);
45 static void ena_destroy_device(struct ena_adapter *adapter, bool graceful);
46 static int ena_restore_device(struct ena_adapter *adapter);
48 static void ena_init_io_rings(struct ena_adapter *adapter,
49 int first_index, int count);
50 static void ena_init_napi_in_range(struct ena_adapter *adapter, int first_index,
52 static void ena_del_napi_in_range(struct ena_adapter *adapter, int first_index,
54 static int ena_setup_tx_resources(struct ena_adapter *adapter, int qid);
55 static int ena_setup_tx_resources_in_range(struct ena_adapter *adapter,
58 static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid);
59 static void ena_free_tx_resources(struct ena_adapter *adapter, int qid);
60 static int ena_clean_xdp_irq(struct ena_ring *xdp_ring, u32 budget);
61 static void ena_destroy_all_tx_queues(struct ena_adapter *adapter);
62 static void ena_free_all_io_tx_resources(struct ena_adapter *adapter);
63 static void ena_napi_disable_in_range(struct ena_adapter *adapter,
64 int first_index, int count);
65 static void ena_napi_enable_in_range(struct ena_adapter *adapter,
66 int first_index, int count);
67 static int ena_up(struct ena_adapter *adapter);
68 static void ena_down(struct ena_adapter *adapter);
69 static void ena_unmask_interrupt(struct ena_ring *tx_ring,
70 struct ena_ring *rx_ring);
71 static void ena_update_ring_numa_node(struct ena_ring *tx_ring,
72 struct ena_ring *rx_ring);
73 static void ena_unmap_tx_buff(struct ena_ring *tx_ring,
74 struct ena_tx_buffer *tx_info);
75 static int ena_create_io_tx_queues_in_range(struct ena_adapter *adapter,
76 int first_index, int count);
78 /* Increase a stat by cnt while holding syncp seqlock on 32bit machines */
79 static void ena_increase_stat(u64 *statp, u64 cnt,
80 struct u64_stats_sync *syncp)
82 u64_stats_update_begin(syncp);
84 u64_stats_update_end(syncp);
87 static void ena_ring_tx_doorbell(struct ena_ring *tx_ring)
89 ena_com_write_sq_doorbell(tx_ring->ena_com_io_sq);
90 ena_increase_stat(&tx_ring->tx_stats.doorbells, 1, &tx_ring->syncp);
93 static void ena_tx_timeout(struct net_device *dev, unsigned int txqueue)
95 struct ena_adapter *adapter = netdev_priv(dev);
97 /* Change the state of the device to trigger reset
98 * Check that we are not in the middle or a trigger already
101 if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
104 ena_reset_device(adapter, ENA_REGS_RESET_OS_NETDEV_WD);
105 ena_increase_stat(&adapter->dev_stats.tx_timeout, 1, &adapter->syncp);
107 netif_err(adapter, tx_err, dev, "Transmit time out\n");
110 static void update_rx_ring_mtu(struct ena_adapter *adapter, int mtu)
114 for (i = 0; i < adapter->num_io_queues; i++)
115 adapter->rx_ring[i].mtu = mtu;
118 static int ena_change_mtu(struct net_device *dev, int new_mtu)
120 struct ena_adapter *adapter = netdev_priv(dev);
123 ret = ena_com_set_dev_mtu(adapter->ena_dev, new_mtu);
125 netif_dbg(adapter, drv, dev, "Set MTU to %d\n", new_mtu);
126 update_rx_ring_mtu(adapter, new_mtu);
129 netif_err(adapter, drv, dev, "Failed to set MTU to %d\n",
136 static int ena_xmit_common(struct net_device *dev,
137 struct ena_ring *ring,
138 struct ena_tx_buffer *tx_info,
139 struct ena_com_tx_ctx *ena_tx_ctx,
143 struct ena_adapter *adapter = netdev_priv(dev);
146 if (unlikely(ena_com_is_doorbell_needed(ring->ena_com_io_sq,
148 netif_dbg(adapter, tx_queued, dev,
149 "llq tx max burst size of queue %d achieved, writing doorbell to send burst\n",
151 ena_ring_tx_doorbell(ring);
154 /* prepare the packet's descriptors to dma engine */
155 rc = ena_com_prepare_tx(ring->ena_com_io_sq, ena_tx_ctx,
158 /* In case there isn't enough space in the queue for the packet,
159 * we simply drop it. All other failure reasons of
160 * ena_com_prepare_tx() are fatal and therefore require a device reset.
163 netif_err(adapter, tx_queued, dev,
164 "Failed to prepare tx bufs\n");
165 ena_increase_stat(&ring->tx_stats.prepare_ctx_err, 1,
168 ena_reset_device(adapter,
169 ENA_REGS_RESET_DRIVER_INVALID_STATE);
173 u64_stats_update_begin(&ring->syncp);
174 ring->tx_stats.cnt++;
175 ring->tx_stats.bytes += bytes;
176 u64_stats_update_end(&ring->syncp);
178 tx_info->tx_descs = nb_hw_desc;
179 tx_info->last_jiffies = jiffies;
180 tx_info->print_once = 0;
182 ring->next_to_use = ENA_TX_RING_IDX_NEXT(next_to_use,
187 /* This is the XDP napi callback. XDP queues use a separate napi callback
190 static int ena_xdp_io_poll(struct napi_struct *napi, int budget)
192 struct ena_napi *ena_napi = container_of(napi, struct ena_napi, napi);
193 u32 xdp_work_done, xdp_budget;
194 struct ena_ring *xdp_ring;
195 int napi_comp_call = 0;
198 xdp_ring = ena_napi->xdp_ring;
202 if (!test_bit(ENA_FLAG_DEV_UP, &xdp_ring->adapter->flags) ||
203 test_bit(ENA_FLAG_TRIGGER_RESET, &xdp_ring->adapter->flags)) {
204 napi_complete_done(napi, 0);
208 xdp_work_done = ena_clean_xdp_irq(xdp_ring, xdp_budget);
210 /* If the device is about to reset or down, avoid unmask
211 * the interrupt and return 0 so NAPI won't reschedule
213 if (unlikely(!test_bit(ENA_FLAG_DEV_UP, &xdp_ring->adapter->flags))) {
214 napi_complete_done(napi, 0);
216 } else if (xdp_budget > xdp_work_done) {
218 if (napi_complete_done(napi, xdp_work_done))
219 ena_unmask_interrupt(xdp_ring, NULL);
220 ena_update_ring_numa_node(xdp_ring, NULL);
226 u64_stats_update_begin(&xdp_ring->syncp);
227 xdp_ring->tx_stats.napi_comp += napi_comp_call;
228 xdp_ring->tx_stats.tx_poll++;
229 u64_stats_update_end(&xdp_ring->syncp);
230 xdp_ring->tx_stats.last_napi_jiffies = jiffies;
235 static int ena_xdp_tx_map_frame(struct ena_ring *xdp_ring,
236 struct ena_tx_buffer *tx_info,
237 struct xdp_frame *xdpf,
238 struct ena_com_tx_ctx *ena_tx_ctx)
240 struct ena_adapter *adapter = xdp_ring->adapter;
241 struct ena_com_buf *ena_buf;
247 tx_info->xdpf = xdpf;
248 data = tx_info->xdpf->data;
249 size = tx_info->xdpf->len;
251 if (xdp_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
252 /* Designate part of the packet for LLQ */
253 push_len = min_t(u32, size, xdp_ring->tx_max_header_size);
255 ena_tx_ctx->push_header = data;
261 ena_tx_ctx->header_len = push_len;
264 dma = dma_map_single(xdp_ring->dev,
268 if (unlikely(dma_mapping_error(xdp_ring->dev, dma)))
269 goto error_report_dma_error;
271 tx_info->map_linear_data = 0;
273 ena_buf = tx_info->bufs;
274 ena_buf->paddr = dma;
277 ena_tx_ctx->ena_bufs = ena_buf;
278 ena_tx_ctx->num_bufs = tx_info->num_of_bufs = 1;
283 error_report_dma_error:
284 ena_increase_stat(&xdp_ring->tx_stats.dma_mapping_err, 1,
286 netif_warn(adapter, tx_queued, adapter->netdev, "Failed to map xdp buff\n");
291 static int ena_xdp_xmit_frame(struct ena_ring *xdp_ring,
292 struct net_device *dev,
293 struct xdp_frame *xdpf,
296 struct ena_com_tx_ctx ena_tx_ctx = {};
297 struct ena_tx_buffer *tx_info;
298 u16 next_to_use, req_id;
301 next_to_use = xdp_ring->next_to_use;
302 req_id = xdp_ring->free_ids[next_to_use];
303 tx_info = &xdp_ring->tx_buffer_info[req_id];
304 tx_info->num_of_bufs = 0;
306 rc = ena_xdp_tx_map_frame(xdp_ring, tx_info, xdpf, &ena_tx_ctx);
310 ena_tx_ctx.req_id = req_id;
312 rc = ena_xmit_common(dev,
319 goto error_unmap_dma;
321 /* trigger the dma engine. ena_ring_tx_doorbell()
322 * calls a memory barrier inside it.
324 if (flags & XDP_XMIT_FLUSH)
325 ena_ring_tx_doorbell(xdp_ring);
330 ena_unmap_tx_buff(xdp_ring, tx_info);
331 tx_info->xdpf = NULL;
335 static int ena_xdp_xmit(struct net_device *dev, int n,
336 struct xdp_frame **frames, u32 flags)
338 struct ena_adapter *adapter = netdev_priv(dev);
339 struct ena_ring *xdp_ring;
340 int qid, i, nxmit = 0;
342 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
345 if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
348 /* We assume that all rings have the same XDP program */
349 if (!READ_ONCE(adapter->rx_ring->xdp_bpf_prog))
352 qid = smp_processor_id() % adapter->xdp_num_queues;
353 qid += adapter->xdp_first_ring;
354 xdp_ring = &adapter->tx_ring[qid];
356 /* Other CPU ids might try to send thorugh this queue */
357 spin_lock(&xdp_ring->xdp_tx_lock);
359 for (i = 0; i < n; i++) {
360 if (ena_xdp_xmit_frame(xdp_ring, dev, frames[i], 0))
365 /* Ring doorbell to make device aware of the packets */
366 if (flags & XDP_XMIT_FLUSH)
367 ena_ring_tx_doorbell(xdp_ring);
369 spin_unlock(&xdp_ring->xdp_tx_lock);
371 /* Return number of packets sent */
375 static int ena_xdp_execute(struct ena_ring *rx_ring, struct xdp_buff *xdp)
377 struct bpf_prog *xdp_prog;
378 struct ena_ring *xdp_ring;
379 u32 verdict = XDP_PASS;
380 struct xdp_frame *xdpf;
383 xdp_prog = READ_ONCE(rx_ring->xdp_bpf_prog);
388 verdict = bpf_prog_run_xdp(xdp_prog, xdp);
392 xdpf = xdp_convert_buff_to_frame(xdp);
393 if (unlikely(!xdpf)) {
394 trace_xdp_exception(rx_ring->netdev, xdp_prog, verdict);
395 xdp_stat = &rx_ring->rx_stats.xdp_aborted;
396 verdict = XDP_ABORTED;
400 /* Find xmit queue */
401 xdp_ring = rx_ring->xdp_ring;
403 /* The XDP queues are shared between XDP_TX and XDP_REDIRECT */
404 spin_lock(&xdp_ring->xdp_tx_lock);
406 if (ena_xdp_xmit_frame(xdp_ring, rx_ring->netdev, xdpf,
408 xdp_return_frame(xdpf);
410 spin_unlock(&xdp_ring->xdp_tx_lock);
411 xdp_stat = &rx_ring->rx_stats.xdp_tx;
414 if (likely(!xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog))) {
415 xdp_stat = &rx_ring->rx_stats.xdp_redirect;
418 trace_xdp_exception(rx_ring->netdev, xdp_prog, verdict);
419 xdp_stat = &rx_ring->rx_stats.xdp_aborted;
420 verdict = XDP_ABORTED;
423 trace_xdp_exception(rx_ring->netdev, xdp_prog, verdict);
424 xdp_stat = &rx_ring->rx_stats.xdp_aborted;
427 xdp_stat = &rx_ring->rx_stats.xdp_drop;
430 xdp_stat = &rx_ring->rx_stats.xdp_pass;
433 bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, verdict);
434 xdp_stat = &rx_ring->rx_stats.xdp_invalid;
437 ena_increase_stat(xdp_stat, 1, &rx_ring->syncp);
442 static void ena_init_all_xdp_queues(struct ena_adapter *adapter)
444 adapter->xdp_first_ring = adapter->num_io_queues;
445 adapter->xdp_num_queues = adapter->num_io_queues;
447 ena_init_io_rings(adapter,
448 adapter->xdp_first_ring,
449 adapter->xdp_num_queues);
452 static int ena_setup_and_create_all_xdp_queues(struct ena_adapter *adapter)
456 rc = ena_setup_tx_resources_in_range(adapter, adapter->xdp_first_ring,
457 adapter->xdp_num_queues);
461 rc = ena_create_io_tx_queues_in_range(adapter,
462 adapter->xdp_first_ring,
463 adapter->xdp_num_queues);
470 ena_free_all_io_tx_resources(adapter);
475 /* Provides a way for both kernel and bpf-prog to know
476 * more about the RX-queue a given XDP frame arrived on.
478 static int ena_xdp_register_rxq_info(struct ena_ring *rx_ring)
482 rc = xdp_rxq_info_reg(&rx_ring->xdp_rxq, rx_ring->netdev, rx_ring->qid, 0);
485 netif_err(rx_ring->adapter, ifup, rx_ring->netdev,
486 "Failed to register xdp rx queue info. RX queue num %d rc: %d\n",
491 rc = xdp_rxq_info_reg_mem_model(&rx_ring->xdp_rxq, MEM_TYPE_PAGE_SHARED,
495 netif_err(rx_ring->adapter, ifup, rx_ring->netdev,
496 "Failed to register xdp rx queue info memory model. RX queue num %d rc: %d\n",
498 xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
505 static void ena_xdp_unregister_rxq_info(struct ena_ring *rx_ring)
507 xdp_rxq_info_unreg_mem_model(&rx_ring->xdp_rxq);
508 xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
511 static void ena_xdp_exchange_program_rx_in_range(struct ena_adapter *adapter,
512 struct bpf_prog *prog,
513 int first, int count)
515 struct ena_ring *rx_ring;
518 for (i = first; i < count; i++) {
519 rx_ring = &adapter->rx_ring[i];
520 xchg(&rx_ring->xdp_bpf_prog, prog);
522 ena_xdp_register_rxq_info(rx_ring);
523 rx_ring->rx_headroom = XDP_PACKET_HEADROOM;
525 ena_xdp_unregister_rxq_info(rx_ring);
526 rx_ring->rx_headroom = NET_SKB_PAD;
531 static void ena_xdp_exchange_program(struct ena_adapter *adapter,
532 struct bpf_prog *prog)
534 struct bpf_prog *old_bpf_prog = xchg(&adapter->xdp_bpf_prog, prog);
536 ena_xdp_exchange_program_rx_in_range(adapter,
539 adapter->num_io_queues);
542 bpf_prog_put(old_bpf_prog);
545 static int ena_destroy_and_free_all_xdp_queues(struct ena_adapter *adapter)
550 was_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
555 adapter->xdp_first_ring = 0;
556 adapter->xdp_num_queues = 0;
557 ena_xdp_exchange_program(adapter, NULL);
559 rc = ena_up(adapter);
566 static int ena_xdp_set(struct net_device *netdev, struct netdev_bpf *bpf)
568 struct ena_adapter *adapter = netdev_priv(netdev);
569 struct bpf_prog *prog = bpf->prog;
570 struct bpf_prog *old_bpf_prog;
574 is_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
575 rc = ena_xdp_allowed(adapter);
576 if (rc == ENA_XDP_ALLOWED) {
577 old_bpf_prog = adapter->xdp_bpf_prog;
580 ena_init_all_xdp_queues(adapter);
581 } else if (!old_bpf_prog) {
583 ena_init_all_xdp_queues(adapter);
585 ena_xdp_exchange_program(adapter, prog);
587 if (is_up && !old_bpf_prog) {
588 rc = ena_up(adapter);
592 } else if (old_bpf_prog) {
593 rc = ena_destroy_and_free_all_xdp_queues(adapter);
598 prev_mtu = netdev->max_mtu;
599 netdev->max_mtu = prog ? ENA_XDP_MAX_MTU : adapter->max_mtu;
602 netif_info(adapter, drv, adapter->netdev,
603 "XDP program is set, changing the max_mtu from %d to %d",
604 prev_mtu, netdev->max_mtu);
606 } else if (rc == ENA_XDP_CURRENT_MTU_TOO_LARGE) {
607 netif_err(adapter, drv, adapter->netdev,
608 "Failed to set xdp program, the current MTU (%d) is larger than the maximum allowed MTU (%lu) while xdp is on",
609 netdev->mtu, ENA_XDP_MAX_MTU);
610 NL_SET_ERR_MSG_MOD(bpf->extack,
611 "Failed to set xdp program, the current MTU is larger than the maximum allowed MTU. Check the dmesg for more info");
613 } else if (rc == ENA_XDP_NO_ENOUGH_QUEUES) {
614 netif_err(adapter, drv, adapter->netdev,
615 "Failed to set xdp program, the Rx/Tx channel count should be at most half of the maximum allowed channel count. The current queue count (%d), the maximal queue count (%d)\n",
616 adapter->num_io_queues, adapter->max_num_io_queues);
617 NL_SET_ERR_MSG_MOD(bpf->extack,
618 "Failed to set xdp program, there is no enough space for allocating XDP queues, Check the dmesg for more info");
625 /* This is the main xdp callback, it's used by the kernel to set/unset the xdp
626 * program as well as to query the current xdp program id.
628 static int ena_xdp(struct net_device *netdev, struct netdev_bpf *bpf)
630 switch (bpf->command) {
632 return ena_xdp_set(netdev, bpf);
639 static int ena_init_rx_cpu_rmap(struct ena_adapter *adapter)
641 #ifdef CONFIG_RFS_ACCEL
645 adapter->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(adapter->num_io_queues);
646 if (!adapter->netdev->rx_cpu_rmap)
648 for (i = 0; i < adapter->num_io_queues; i++) {
649 int irq_idx = ENA_IO_IRQ_IDX(i);
651 rc = irq_cpu_rmap_add(adapter->netdev->rx_cpu_rmap,
652 pci_irq_vector(adapter->pdev, irq_idx));
654 free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
655 adapter->netdev->rx_cpu_rmap = NULL;
659 #endif /* CONFIG_RFS_ACCEL */
663 static void ena_init_io_rings_common(struct ena_adapter *adapter,
664 struct ena_ring *ring, u16 qid)
667 ring->pdev = adapter->pdev;
668 ring->dev = &adapter->pdev->dev;
669 ring->netdev = adapter->netdev;
670 ring->napi = &adapter->ena_napi[qid].napi;
671 ring->adapter = adapter;
672 ring->ena_dev = adapter->ena_dev;
673 ring->per_napi_packets = 0;
675 ring->no_interrupt_event_cnt = 0;
676 u64_stats_init(&ring->syncp);
679 static void ena_init_io_rings(struct ena_adapter *adapter,
680 int first_index, int count)
682 struct ena_com_dev *ena_dev;
683 struct ena_ring *txr, *rxr;
686 ena_dev = adapter->ena_dev;
688 for (i = first_index; i < first_index + count; i++) {
689 txr = &adapter->tx_ring[i];
690 rxr = &adapter->rx_ring[i];
692 /* TX common ring state */
693 ena_init_io_rings_common(adapter, txr, i);
695 /* TX specific ring state */
696 txr->ring_size = adapter->requested_tx_ring_size;
697 txr->tx_max_header_size = ena_dev->tx_max_header_size;
698 txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
699 txr->sgl_size = adapter->max_tx_sgl_size;
700 txr->smoothed_interval =
701 ena_com_get_nonadaptive_moderation_interval_tx(ena_dev);
702 txr->disable_meta_caching = adapter->disable_meta_caching;
703 spin_lock_init(&txr->xdp_tx_lock);
705 /* Don't init RX queues for xdp queues */
706 if (!ENA_IS_XDP_INDEX(adapter, i)) {
707 /* RX common ring state */
708 ena_init_io_rings_common(adapter, rxr, i);
710 /* RX specific ring state */
711 rxr->ring_size = adapter->requested_rx_ring_size;
712 rxr->rx_copybreak = adapter->rx_copybreak;
713 rxr->sgl_size = adapter->max_rx_sgl_size;
714 rxr->smoothed_interval =
715 ena_com_get_nonadaptive_moderation_interval_rx(ena_dev);
716 rxr->empty_rx_queue = 0;
717 rxr->rx_headroom = NET_SKB_PAD;
718 adapter->ena_napi[i].dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
719 rxr->xdp_ring = &adapter->tx_ring[i + adapter->num_io_queues];
724 /* ena_setup_tx_resources - allocate I/O Tx resources (Descriptors)
725 * @adapter: network interface device structure
728 * Return 0 on success, negative on failure
730 static int ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
732 struct ena_ring *tx_ring = &adapter->tx_ring[qid];
733 struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
736 if (tx_ring->tx_buffer_info) {
737 netif_err(adapter, ifup,
738 adapter->netdev, "tx_buffer_info info is not NULL");
742 size = sizeof(struct ena_tx_buffer) * tx_ring->ring_size;
743 node = cpu_to_node(ena_irq->cpu);
745 tx_ring->tx_buffer_info = vzalloc_node(size, node);
746 if (!tx_ring->tx_buffer_info) {
747 tx_ring->tx_buffer_info = vzalloc(size);
748 if (!tx_ring->tx_buffer_info)
749 goto err_tx_buffer_info;
752 size = sizeof(u16) * tx_ring->ring_size;
753 tx_ring->free_ids = vzalloc_node(size, node);
754 if (!tx_ring->free_ids) {
755 tx_ring->free_ids = vzalloc(size);
756 if (!tx_ring->free_ids)
757 goto err_tx_free_ids;
760 size = tx_ring->tx_max_header_size;
761 tx_ring->push_buf_intermediate_buf = vzalloc_node(size, node);
762 if (!tx_ring->push_buf_intermediate_buf) {
763 tx_ring->push_buf_intermediate_buf = vzalloc(size);
764 if (!tx_ring->push_buf_intermediate_buf)
765 goto err_push_buf_intermediate_buf;
768 /* Req id ring for TX out of order completions */
769 for (i = 0; i < tx_ring->ring_size; i++)
770 tx_ring->free_ids[i] = i;
772 /* Reset tx statistics */
773 memset(&tx_ring->tx_stats, 0x0, sizeof(tx_ring->tx_stats));
775 tx_ring->next_to_use = 0;
776 tx_ring->next_to_clean = 0;
777 tx_ring->cpu = ena_irq->cpu;
780 err_push_buf_intermediate_buf:
781 vfree(tx_ring->free_ids);
782 tx_ring->free_ids = NULL;
784 vfree(tx_ring->tx_buffer_info);
785 tx_ring->tx_buffer_info = NULL;
790 /* ena_free_tx_resources - Free I/O Tx Resources per Queue
791 * @adapter: network interface device structure
794 * Free all transmit software resources
796 static void ena_free_tx_resources(struct ena_adapter *adapter, int qid)
798 struct ena_ring *tx_ring = &adapter->tx_ring[qid];
800 vfree(tx_ring->tx_buffer_info);
801 tx_ring->tx_buffer_info = NULL;
803 vfree(tx_ring->free_ids);
804 tx_ring->free_ids = NULL;
806 vfree(tx_ring->push_buf_intermediate_buf);
807 tx_ring->push_buf_intermediate_buf = NULL;
810 static int ena_setup_tx_resources_in_range(struct ena_adapter *adapter,
816 for (i = first_index; i < first_index + count; i++) {
817 rc = ena_setup_tx_resources(adapter, i);
826 netif_err(adapter, ifup, adapter->netdev,
827 "Tx queue %d: allocation failed\n", i);
829 /* rewind the index freeing the rings as we go */
830 while (first_index < i--)
831 ena_free_tx_resources(adapter, i);
835 static void ena_free_all_io_tx_resources_in_range(struct ena_adapter *adapter,
836 int first_index, int count)
840 for (i = first_index; i < first_index + count; i++)
841 ena_free_tx_resources(adapter, i);
844 /* ena_free_all_io_tx_resources - Free I/O Tx Resources for All Queues
845 * @adapter: board private structure
847 * Free all transmit software resources
849 static void ena_free_all_io_tx_resources(struct ena_adapter *adapter)
851 ena_free_all_io_tx_resources_in_range(adapter,
853 adapter->xdp_num_queues +
854 adapter->num_io_queues);
857 /* ena_setup_rx_resources - allocate I/O Rx resources (Descriptors)
858 * @adapter: network interface device structure
861 * Returns 0 on success, negative on failure
863 static int ena_setup_rx_resources(struct ena_adapter *adapter,
866 struct ena_ring *rx_ring = &adapter->rx_ring[qid];
867 struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
870 if (rx_ring->rx_buffer_info) {
871 netif_err(adapter, ifup, adapter->netdev,
872 "rx_buffer_info is not NULL");
876 /* alloc extra element so in rx path
877 * we can always prefetch rx_info + 1
879 size = sizeof(struct ena_rx_buffer) * (rx_ring->ring_size + 1);
880 node = cpu_to_node(ena_irq->cpu);
882 rx_ring->rx_buffer_info = vzalloc_node(size, node);
883 if (!rx_ring->rx_buffer_info) {
884 rx_ring->rx_buffer_info = vzalloc(size);
885 if (!rx_ring->rx_buffer_info)
889 size = sizeof(u16) * rx_ring->ring_size;
890 rx_ring->free_ids = vzalloc_node(size, node);
891 if (!rx_ring->free_ids) {
892 rx_ring->free_ids = vzalloc(size);
893 if (!rx_ring->free_ids) {
894 vfree(rx_ring->rx_buffer_info);
895 rx_ring->rx_buffer_info = NULL;
900 /* Req id ring for receiving RX pkts out of order */
901 for (i = 0; i < rx_ring->ring_size; i++)
902 rx_ring->free_ids[i] = i;
904 /* Reset rx statistics */
905 memset(&rx_ring->rx_stats, 0x0, sizeof(rx_ring->rx_stats));
907 rx_ring->next_to_clean = 0;
908 rx_ring->next_to_use = 0;
909 rx_ring->cpu = ena_irq->cpu;
914 /* ena_free_rx_resources - Free I/O Rx Resources
915 * @adapter: network interface device structure
918 * Free all receive software resources
920 static void ena_free_rx_resources(struct ena_adapter *adapter,
923 struct ena_ring *rx_ring = &adapter->rx_ring[qid];
925 vfree(rx_ring->rx_buffer_info);
926 rx_ring->rx_buffer_info = NULL;
928 vfree(rx_ring->free_ids);
929 rx_ring->free_ids = NULL;
932 /* ena_setup_all_rx_resources - allocate I/O Rx queues resources for all queues
933 * @adapter: board private structure
935 * Return 0 on success, negative on failure
937 static int ena_setup_all_rx_resources(struct ena_adapter *adapter)
941 for (i = 0; i < adapter->num_io_queues; i++) {
942 rc = ena_setup_rx_resources(adapter, i);
951 netif_err(adapter, ifup, adapter->netdev,
952 "Rx queue %d: allocation failed\n", i);
954 /* rewind the index freeing the rings as we go */
956 ena_free_rx_resources(adapter, i);
960 /* ena_free_all_io_rx_resources - Free I/O Rx Resources for All Queues
961 * @adapter: board private structure
963 * Free all receive software resources
965 static void ena_free_all_io_rx_resources(struct ena_adapter *adapter)
969 for (i = 0; i < adapter->num_io_queues; i++)
970 ena_free_rx_resources(adapter, i);
973 static struct page *ena_alloc_map_page(struct ena_ring *rx_ring,
978 /* This would allocate the page on the same NUMA node the executing code
981 page = dev_alloc_page();
983 ena_increase_stat(&rx_ring->rx_stats.page_alloc_fail, 1,
985 return ERR_PTR(-ENOSPC);
988 /* To enable NIC-side port-mirroring, AKA SPAN port,
989 * we make the buffer readable from the nic as well
991 *dma = dma_map_page(rx_ring->dev, page, 0, ENA_PAGE_SIZE,
993 if (unlikely(dma_mapping_error(rx_ring->dev, *dma))) {
994 ena_increase_stat(&rx_ring->rx_stats.dma_mapping_err, 1,
997 return ERR_PTR(-EIO);
1003 static int ena_alloc_rx_buffer(struct ena_ring *rx_ring,
1004 struct ena_rx_buffer *rx_info)
1006 int headroom = rx_ring->rx_headroom;
1007 struct ena_com_buf *ena_buf;
1012 /* restore page offset value in case it has been changed by device */
1013 rx_info->page_offset = headroom;
1015 /* if previous allocated page is not used */
1016 if (unlikely(rx_info->page))
1019 /* We handle DMA here */
1020 page = ena_alloc_map_page(rx_ring, &dma);
1021 if (unlikely(IS_ERR(page)))
1022 return PTR_ERR(page);
1024 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1025 "Allocate page %p, rx_info %p\n", page, rx_info);
1027 tailroom = SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
1029 rx_info->page = page;
1030 ena_buf = &rx_info->ena_buf;
1031 ena_buf->paddr = dma + headroom;
1032 ena_buf->len = ENA_PAGE_SIZE - headroom - tailroom;
1037 static void ena_unmap_rx_buff(struct ena_ring *rx_ring,
1038 struct ena_rx_buffer *rx_info)
1040 struct ena_com_buf *ena_buf = &rx_info->ena_buf;
1042 dma_unmap_page(rx_ring->dev, ena_buf->paddr - rx_ring->rx_headroom,
1047 static void ena_free_rx_page(struct ena_ring *rx_ring,
1048 struct ena_rx_buffer *rx_info)
1050 struct page *page = rx_info->page;
1052 if (unlikely(!page)) {
1053 netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
1054 "Trying to free unallocated buffer\n");
1058 ena_unmap_rx_buff(rx_ring, rx_info);
1061 rx_info->page = NULL;
1064 static int ena_refill_rx_bufs(struct ena_ring *rx_ring, u32 num)
1066 u16 next_to_use, req_id;
1070 next_to_use = rx_ring->next_to_use;
1072 for (i = 0; i < num; i++) {
1073 struct ena_rx_buffer *rx_info;
1075 req_id = rx_ring->free_ids[next_to_use];
1077 rx_info = &rx_ring->rx_buffer_info[req_id];
1079 rc = ena_alloc_rx_buffer(rx_ring, rx_info);
1080 if (unlikely(rc < 0)) {
1081 netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
1082 "Failed to allocate buffer for rx queue %d\n",
1086 rc = ena_com_add_single_rx_desc(rx_ring->ena_com_io_sq,
1090 netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
1091 "Failed to add buffer for rx queue %d\n",
1095 next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use,
1096 rx_ring->ring_size);
1099 if (unlikely(i < num)) {
1100 ena_increase_stat(&rx_ring->rx_stats.refil_partial, 1,
1102 netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
1103 "Refilled rx qid %d with only %d buffers (from %d)\n",
1104 rx_ring->qid, i, num);
1107 /* ena_com_write_sq_doorbell issues a wmb() */
1109 ena_com_write_sq_doorbell(rx_ring->ena_com_io_sq);
1111 rx_ring->next_to_use = next_to_use;
1116 static void ena_free_rx_bufs(struct ena_adapter *adapter,
1119 struct ena_ring *rx_ring = &adapter->rx_ring[qid];
1122 for (i = 0; i < rx_ring->ring_size; i++) {
1123 struct ena_rx_buffer *rx_info = &rx_ring->rx_buffer_info[i];
1126 ena_free_rx_page(rx_ring, rx_info);
1130 /* ena_refill_all_rx_bufs - allocate all queues Rx buffers
1131 * @adapter: board private structure
1133 static void ena_refill_all_rx_bufs(struct ena_adapter *adapter)
1135 struct ena_ring *rx_ring;
1136 int i, rc, bufs_num;
1138 for (i = 0; i < adapter->num_io_queues; i++) {
1139 rx_ring = &adapter->rx_ring[i];
1140 bufs_num = rx_ring->ring_size - 1;
1141 rc = ena_refill_rx_bufs(rx_ring, bufs_num);
1143 if (unlikely(rc != bufs_num))
1144 netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
1145 "Refilling Queue %d failed. allocated %d buffers from: %d\n",
1150 static void ena_free_all_rx_bufs(struct ena_adapter *adapter)
1154 for (i = 0; i < adapter->num_io_queues; i++)
1155 ena_free_rx_bufs(adapter, i);
1158 static void ena_unmap_tx_buff(struct ena_ring *tx_ring,
1159 struct ena_tx_buffer *tx_info)
1161 struct ena_com_buf *ena_buf;
1165 ena_buf = tx_info->bufs;
1166 cnt = tx_info->num_of_bufs;
1171 if (tx_info->map_linear_data) {
1172 dma_unmap_single(tx_ring->dev,
1173 dma_unmap_addr(ena_buf, paddr),
1174 dma_unmap_len(ena_buf, len),
1180 /* unmap remaining mapped pages */
1181 for (i = 0; i < cnt; i++) {
1182 dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
1183 dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
1188 /* ena_free_tx_bufs - Free Tx Buffers per Queue
1189 * @tx_ring: TX ring for which buffers be freed
1191 static void ena_free_tx_bufs(struct ena_ring *tx_ring)
1193 bool print_once = true;
1196 for (i = 0; i < tx_ring->ring_size; i++) {
1197 struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
1203 netif_notice(tx_ring->adapter, ifdown, tx_ring->netdev,
1204 "Free uncompleted tx skb qid %d idx 0x%x\n",
1208 netif_dbg(tx_ring->adapter, ifdown, tx_ring->netdev,
1209 "Free uncompleted tx skb qid %d idx 0x%x\n",
1213 ena_unmap_tx_buff(tx_ring, tx_info);
1215 dev_kfree_skb_any(tx_info->skb);
1217 netdev_tx_reset_queue(netdev_get_tx_queue(tx_ring->netdev,
1221 static void ena_free_all_tx_bufs(struct ena_adapter *adapter)
1223 struct ena_ring *tx_ring;
1226 for (i = 0; i < adapter->num_io_queues + adapter->xdp_num_queues; i++) {
1227 tx_ring = &adapter->tx_ring[i];
1228 ena_free_tx_bufs(tx_ring);
1232 static void ena_destroy_all_tx_queues(struct ena_adapter *adapter)
1237 for (i = 0; i < adapter->num_io_queues + adapter->xdp_num_queues; i++) {
1238 ena_qid = ENA_IO_TXQ_IDX(i);
1239 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
1243 static void ena_destroy_all_rx_queues(struct ena_adapter *adapter)
1248 for (i = 0; i < adapter->num_io_queues; i++) {
1249 ena_qid = ENA_IO_RXQ_IDX(i);
1250 cancel_work_sync(&adapter->ena_napi[i].dim.work);
1251 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
1255 static void ena_destroy_all_io_queues(struct ena_adapter *adapter)
1257 ena_destroy_all_tx_queues(adapter);
1258 ena_destroy_all_rx_queues(adapter);
1261 static int handle_invalid_req_id(struct ena_ring *ring, u16 req_id,
1262 struct ena_tx_buffer *tx_info, bool is_xdp)
1265 netif_err(ring->adapter,
1268 "tx_info doesn't have valid %s. qid %u req_id %u",
1269 is_xdp ? "xdp frame" : "skb", ring->qid, req_id);
1271 netif_err(ring->adapter,
1274 "Invalid req_id %u in qid %u\n",
1277 ena_increase_stat(&ring->tx_stats.bad_req_id, 1, &ring->syncp);
1278 ena_reset_device(ring->adapter, ENA_REGS_RESET_INV_TX_REQ_ID);
1283 static int validate_tx_req_id(struct ena_ring *tx_ring, u16 req_id)
1285 struct ena_tx_buffer *tx_info;
1287 tx_info = &tx_ring->tx_buffer_info[req_id];
1288 if (likely(tx_info->skb))
1291 return handle_invalid_req_id(tx_ring, req_id, tx_info, false);
1294 static int validate_xdp_req_id(struct ena_ring *xdp_ring, u16 req_id)
1296 struct ena_tx_buffer *tx_info;
1298 tx_info = &xdp_ring->tx_buffer_info[req_id];
1299 if (likely(tx_info->xdpf))
1302 return handle_invalid_req_id(xdp_ring, req_id, tx_info, true);
1305 static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
1307 struct netdev_queue *txq;
1316 next_to_clean = tx_ring->next_to_clean;
1317 txq = netdev_get_tx_queue(tx_ring->netdev, tx_ring->qid);
1319 while (tx_pkts < budget) {
1320 struct ena_tx_buffer *tx_info;
1321 struct sk_buff *skb;
1323 rc = ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq,
1326 if (unlikely(rc == -EINVAL))
1327 handle_invalid_req_id(tx_ring, req_id, NULL,
1332 /* validate that the request id points to a valid skb */
1333 rc = validate_tx_req_id(tx_ring, req_id);
1337 tx_info = &tx_ring->tx_buffer_info[req_id];
1340 /* prefetch skb_end_pointer() to speedup skb_shinfo(skb) */
1341 prefetch(&skb->end);
1343 tx_info->skb = NULL;
1344 tx_info->last_jiffies = 0;
1346 ena_unmap_tx_buff(tx_ring, tx_info);
1348 netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
1349 "tx_poll: q %d skb %p completed\n", tx_ring->qid,
1352 tx_bytes += skb->len;
1355 total_done += tx_info->tx_descs;
1357 tx_ring->free_ids[next_to_clean] = req_id;
1358 next_to_clean = ENA_TX_RING_IDX_NEXT(next_to_clean,
1359 tx_ring->ring_size);
1362 tx_ring->next_to_clean = next_to_clean;
1363 ena_com_comp_ack(tx_ring->ena_com_io_sq, total_done);
1364 ena_com_update_dev_comp_head(tx_ring->ena_com_io_cq);
1366 netdev_tx_completed_queue(txq, tx_pkts, tx_bytes);
1368 netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
1369 "tx_poll: q %d done. total pkts: %d\n",
1370 tx_ring->qid, tx_pkts);
1372 /* need to make the rings circular update visible to
1373 * ena_start_xmit() before checking for netif_queue_stopped().
1377 above_thresh = ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
1378 ENA_TX_WAKEUP_THRESH);
1379 if (unlikely(netif_tx_queue_stopped(txq) && above_thresh)) {
1380 __netif_tx_lock(txq, smp_processor_id());
1382 ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
1383 ENA_TX_WAKEUP_THRESH);
1384 if (netif_tx_queue_stopped(txq) && above_thresh &&
1385 test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags)) {
1386 netif_tx_wake_queue(txq);
1387 ena_increase_stat(&tx_ring->tx_stats.queue_wakeup, 1,
1390 __netif_tx_unlock(txq);
1396 static struct sk_buff *ena_alloc_skb(struct ena_ring *rx_ring, void *first_frag)
1398 struct sk_buff *skb;
1401 skb = napi_alloc_skb(rx_ring->napi, rx_ring->rx_copybreak);
1403 skb = napi_build_skb(first_frag, ENA_PAGE_SIZE);
1405 if (unlikely(!skb)) {
1406 ena_increase_stat(&rx_ring->rx_stats.skb_alloc_fail, 1,
1409 netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
1410 "Failed to allocate skb. first_frag %s\n",
1411 first_frag ? "provided" : "not provided");
1418 static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
1419 struct ena_com_rx_buf_info *ena_bufs,
1423 struct ena_rx_buffer *rx_info;
1424 struct ena_adapter *adapter;
1425 u16 len, req_id, buf = 0;
1426 struct sk_buff *skb;
1431 len = ena_bufs[buf].len;
1432 req_id = ena_bufs[buf].req_id;
1434 rx_info = &rx_ring->rx_buffer_info[req_id];
1436 if (unlikely(!rx_info->page)) {
1437 adapter = rx_ring->adapter;
1438 netif_err(adapter, rx_err, rx_ring->netdev,
1439 "Page is NULL. qid %u req_id %u\n", rx_ring->qid, req_id);
1440 ena_increase_stat(&rx_ring->rx_stats.bad_req_id, 1, &rx_ring->syncp);
1441 ena_reset_device(adapter, ENA_REGS_RESET_INV_RX_REQ_ID);
1445 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1446 "rx_info %p page %p\n",
1447 rx_info, rx_info->page);
1449 /* save virt address of first buffer */
1450 page_addr = page_address(rx_info->page);
1451 page_offset = rx_info->page_offset;
1452 data_addr = page_addr + page_offset;
1454 prefetch(data_addr);
1456 if (len <= rx_ring->rx_copybreak) {
1457 skb = ena_alloc_skb(rx_ring, NULL);
1461 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1462 "RX allocated small packet. len %d. data_len %d\n",
1463 skb->len, skb->data_len);
1465 /* sync this buffer for CPU use */
1466 dma_sync_single_for_cpu(rx_ring->dev,
1467 dma_unmap_addr(&rx_info->ena_buf, paddr),
1470 skb_copy_to_linear_data(skb, data_addr, len);
1471 dma_sync_single_for_device(rx_ring->dev,
1472 dma_unmap_addr(&rx_info->ena_buf, paddr),
1477 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1478 rx_ring->free_ids[*next_to_clean] = req_id;
1479 *next_to_clean = ENA_RX_RING_IDX_ADD(*next_to_clean, descs,
1480 rx_ring->ring_size);
1484 ena_unmap_rx_buff(rx_ring, rx_info);
1486 skb = ena_alloc_skb(rx_ring, page_addr);
1490 /* Populate skb's linear part */
1491 skb_reserve(skb, page_offset);
1493 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1496 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1497 "RX skb updated. len %d. data_len %d\n",
1498 skb->len, skb->data_len);
1500 rx_info->page = NULL;
1502 rx_ring->free_ids[*next_to_clean] = req_id;
1504 ENA_RX_RING_IDX_NEXT(*next_to_clean,
1505 rx_ring->ring_size);
1506 if (likely(--descs == 0))
1510 len = ena_bufs[buf].len;
1511 req_id = ena_bufs[buf].req_id;
1513 rx_info = &rx_ring->rx_buffer_info[req_id];
1515 ena_unmap_rx_buff(rx_ring, rx_info);
1517 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_info->page,
1518 rx_info->page_offset, len, ENA_PAGE_SIZE);
1525 /* ena_rx_checksum - indicate in skb if hw indicated a good cksum
1526 * @adapter: structure containing adapter specific data
1527 * @ena_rx_ctx: received packet context/metadata
1528 * @skb: skb currently being received and modified
1530 static void ena_rx_checksum(struct ena_ring *rx_ring,
1531 struct ena_com_rx_ctx *ena_rx_ctx,
1532 struct sk_buff *skb)
1534 /* Rx csum disabled */
1535 if (unlikely(!(rx_ring->netdev->features & NETIF_F_RXCSUM))) {
1536 skb->ip_summed = CHECKSUM_NONE;
1540 /* For fragmented packets the checksum isn't valid */
1541 if (ena_rx_ctx->frag) {
1542 skb->ip_summed = CHECKSUM_NONE;
1546 /* if IP and error */
1547 if (unlikely((ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4) &&
1548 (ena_rx_ctx->l3_csum_err))) {
1549 /* ipv4 checksum error */
1550 skb->ip_summed = CHECKSUM_NONE;
1551 ena_increase_stat(&rx_ring->rx_stats.csum_bad, 1,
1553 netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
1554 "RX IPv4 header checksum error\n");
1559 if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
1560 (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP))) {
1561 if (unlikely(ena_rx_ctx->l4_csum_err)) {
1562 /* TCP/UDP checksum error */
1563 ena_increase_stat(&rx_ring->rx_stats.csum_bad, 1,
1565 netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
1566 "RX L4 checksum error\n");
1567 skb->ip_summed = CHECKSUM_NONE;
1571 if (likely(ena_rx_ctx->l4_csum_checked)) {
1572 skb->ip_summed = CHECKSUM_UNNECESSARY;
1573 ena_increase_stat(&rx_ring->rx_stats.csum_good, 1,
1576 ena_increase_stat(&rx_ring->rx_stats.csum_unchecked, 1,
1578 skb->ip_summed = CHECKSUM_NONE;
1581 skb->ip_summed = CHECKSUM_NONE;
1587 static void ena_set_rx_hash(struct ena_ring *rx_ring,
1588 struct ena_com_rx_ctx *ena_rx_ctx,
1589 struct sk_buff *skb)
1591 enum pkt_hash_types hash_type;
1593 if (likely(rx_ring->netdev->features & NETIF_F_RXHASH)) {
1594 if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
1595 (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP)))
1597 hash_type = PKT_HASH_TYPE_L4;
1599 hash_type = PKT_HASH_TYPE_NONE;
1601 /* Override hash type if the packet is fragmented */
1602 if (ena_rx_ctx->frag)
1603 hash_type = PKT_HASH_TYPE_NONE;
1605 skb_set_hash(skb, ena_rx_ctx->hash, hash_type);
1609 static int ena_xdp_handle_buff(struct ena_ring *rx_ring, struct xdp_buff *xdp)
1611 struct ena_rx_buffer *rx_info;
1614 rx_info = &rx_ring->rx_buffer_info[rx_ring->ena_bufs[0].req_id];
1615 xdp_prepare_buff(xdp, page_address(rx_info->page),
1616 rx_info->page_offset,
1617 rx_ring->ena_bufs[0].len, false);
1618 /* If for some reason we received a bigger packet than
1619 * we expect, then we simply drop it
1621 if (unlikely(rx_ring->ena_bufs[0].len > ENA_XDP_MAX_MTU))
1624 ret = ena_xdp_execute(rx_ring, xdp);
1626 /* The xdp program might expand the headers */
1627 if (ret == XDP_PASS) {
1628 rx_info->page_offset = xdp->data - xdp->data_hard_start;
1629 rx_ring->ena_bufs[0].len = xdp->data_end - xdp->data;
1634 /* ena_clean_rx_irq - Cleanup RX irq
1635 * @rx_ring: RX ring to clean
1636 * @napi: napi handler
1637 * @budget: how many packets driver is allowed to clean
1639 * Returns the number of cleaned buffers.
1641 static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
1644 u16 next_to_clean = rx_ring->next_to_clean;
1645 struct ena_com_rx_ctx ena_rx_ctx;
1646 struct ena_rx_buffer *rx_info;
1647 struct ena_adapter *adapter;
1648 u32 res_budget, work_done;
1649 int rx_copybreak_pkt = 0;
1650 int refill_threshold;
1651 struct sk_buff *skb;
1652 int refill_required;
1653 struct xdp_buff xdp;
1660 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1661 "%s qid %d\n", __func__, rx_ring->qid);
1662 res_budget = budget;
1663 xdp_init_buff(&xdp, ENA_PAGE_SIZE, &rx_ring->xdp_rxq);
1666 xdp_verdict = XDP_PASS;
1668 ena_rx_ctx.ena_bufs = rx_ring->ena_bufs;
1669 ena_rx_ctx.max_bufs = rx_ring->sgl_size;
1670 ena_rx_ctx.descs = 0;
1671 ena_rx_ctx.pkt_offset = 0;
1672 rc = ena_com_rx_pkt(rx_ring->ena_com_io_cq,
1673 rx_ring->ena_com_io_sq,
1678 if (unlikely(ena_rx_ctx.descs == 0))
1681 /* First descriptor might have an offset set by the device */
1682 rx_info = &rx_ring->rx_buffer_info[rx_ring->ena_bufs[0].req_id];
1683 rx_info->page_offset += ena_rx_ctx.pkt_offset;
1685 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1686 "rx_poll: q %d got packet from ena. descs #: %d l3 proto %d l4 proto %d hash: %x\n",
1687 rx_ring->qid, ena_rx_ctx.descs, ena_rx_ctx.l3_proto,
1688 ena_rx_ctx.l4_proto, ena_rx_ctx.hash);
1690 if (ena_xdp_present_ring(rx_ring))
1691 xdp_verdict = ena_xdp_handle_buff(rx_ring, &xdp);
1693 /* allocate skb and fill it */
1694 if (xdp_verdict == XDP_PASS)
1695 skb = ena_rx_skb(rx_ring,
1700 if (unlikely(!skb)) {
1701 for (i = 0; i < ena_rx_ctx.descs; i++) {
1702 int req_id = rx_ring->ena_bufs[i].req_id;
1704 rx_ring->free_ids[next_to_clean] = req_id;
1706 ENA_RX_RING_IDX_NEXT(next_to_clean,
1707 rx_ring->ring_size);
1709 /* Packets was passed for transmission, unmap it
1712 if (xdp_verdict == XDP_TX || xdp_verdict == XDP_REDIRECT) {
1713 ena_unmap_rx_buff(rx_ring,
1714 &rx_ring->rx_buffer_info[req_id]);
1715 rx_ring->rx_buffer_info[req_id].page = NULL;
1718 if (xdp_verdict != XDP_PASS) {
1719 xdp_flags |= xdp_verdict;
1726 ena_rx_checksum(rx_ring, &ena_rx_ctx, skb);
1728 ena_set_rx_hash(rx_ring, &ena_rx_ctx, skb);
1730 skb_record_rx_queue(skb, rx_ring->qid);
1732 if (rx_ring->ena_bufs[0].len <= rx_ring->rx_copybreak)
1735 total_len += skb->len;
1737 napi_gro_receive(napi, skb);
1740 } while (likely(res_budget));
1742 work_done = budget - res_budget;
1743 rx_ring->per_napi_packets += work_done;
1744 u64_stats_update_begin(&rx_ring->syncp);
1745 rx_ring->rx_stats.bytes += total_len;
1746 rx_ring->rx_stats.cnt += work_done;
1747 rx_ring->rx_stats.rx_copybreak_pkt += rx_copybreak_pkt;
1748 u64_stats_update_end(&rx_ring->syncp);
1750 rx_ring->next_to_clean = next_to_clean;
1752 refill_required = ena_com_free_q_entries(rx_ring->ena_com_io_sq);
1754 min_t(int, rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER,
1755 ENA_RX_REFILL_THRESH_PACKET);
1757 /* Optimization, try to batch new rx buffers */
1758 if (refill_required > refill_threshold) {
1759 ena_com_update_dev_comp_head(rx_ring->ena_com_io_cq);
1760 ena_refill_rx_bufs(rx_ring, refill_required);
1763 if (xdp_flags & XDP_REDIRECT)
1769 adapter = netdev_priv(rx_ring->netdev);
1771 if (rc == -ENOSPC) {
1772 ena_increase_stat(&rx_ring->rx_stats.bad_desc_num, 1,
1774 ena_reset_device(adapter, ENA_REGS_RESET_TOO_MANY_RX_DESCS);
1776 ena_increase_stat(&rx_ring->rx_stats.bad_req_id, 1,
1778 ena_reset_device(adapter, ENA_REGS_RESET_INV_RX_REQ_ID);
1783 static void ena_dim_work(struct work_struct *w)
1785 struct dim *dim = container_of(w, struct dim, work);
1786 struct dim_cq_moder cur_moder =
1787 net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
1788 struct ena_napi *ena_napi = container_of(dim, struct ena_napi, dim);
1790 ena_napi->rx_ring->smoothed_interval = cur_moder.usec;
1791 dim->state = DIM_START_MEASURE;
1794 static void ena_adjust_adaptive_rx_intr_moderation(struct ena_napi *ena_napi)
1796 struct dim_sample dim_sample;
1797 struct ena_ring *rx_ring = ena_napi->rx_ring;
1799 if (!rx_ring->per_napi_packets)
1802 rx_ring->non_empty_napi_events++;
1804 dim_update_sample(rx_ring->non_empty_napi_events,
1805 rx_ring->rx_stats.cnt,
1806 rx_ring->rx_stats.bytes,
1809 net_dim(&ena_napi->dim, dim_sample);
1811 rx_ring->per_napi_packets = 0;
1814 static void ena_unmask_interrupt(struct ena_ring *tx_ring,
1815 struct ena_ring *rx_ring)
1817 struct ena_eth_io_intr_reg intr_reg;
1818 u32 rx_interval = 0;
1819 /* Rx ring can be NULL when for XDP tx queues which don't have an
1820 * accompanying rx_ring pair.
1823 rx_interval = ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev) ?
1824 rx_ring->smoothed_interval :
1825 ena_com_get_nonadaptive_moderation_interval_rx(rx_ring->ena_dev);
1827 /* Update intr register: rx intr delay,
1828 * tx intr delay and interrupt unmask
1830 ena_com_update_intr_reg(&intr_reg,
1832 tx_ring->smoothed_interval,
1835 ena_increase_stat(&tx_ring->tx_stats.unmask_interrupt, 1,
1838 /* It is a shared MSI-X.
1839 * Tx and Rx CQ have pointer to it.
1840 * So we use one of them to reach the intr reg
1841 * The Tx ring is used because the rx_ring is NULL for XDP queues
1843 ena_com_unmask_intr(tx_ring->ena_com_io_cq, &intr_reg);
1846 static void ena_update_ring_numa_node(struct ena_ring *tx_ring,
1847 struct ena_ring *rx_ring)
1849 int cpu = get_cpu();
1852 /* Check only one ring since the 2 rings are running on the same cpu */
1853 if (likely(tx_ring->cpu == cpu))
1856 numa_node = cpu_to_node(cpu);
1859 if (numa_node != NUMA_NO_NODE) {
1860 ena_com_update_numa_node(tx_ring->ena_com_io_cq, numa_node);
1862 ena_com_update_numa_node(rx_ring->ena_com_io_cq,
1875 static int ena_clean_xdp_irq(struct ena_ring *xdp_ring, u32 budget)
1884 if (unlikely(!xdp_ring))
1886 next_to_clean = xdp_ring->next_to_clean;
1888 while (tx_pkts < budget) {
1889 struct ena_tx_buffer *tx_info;
1890 struct xdp_frame *xdpf;
1892 rc = ena_com_tx_comp_req_id_get(xdp_ring->ena_com_io_cq,
1895 if (unlikely(rc == -EINVAL))
1896 handle_invalid_req_id(xdp_ring, req_id, NULL,
1901 /* validate that the request id points to a valid xdp_frame */
1902 rc = validate_xdp_req_id(xdp_ring, req_id);
1906 tx_info = &xdp_ring->tx_buffer_info[req_id];
1907 xdpf = tx_info->xdpf;
1909 tx_info->xdpf = NULL;
1910 tx_info->last_jiffies = 0;
1911 ena_unmap_tx_buff(xdp_ring, tx_info);
1913 netif_dbg(xdp_ring->adapter, tx_done, xdp_ring->netdev,
1914 "tx_poll: q %d skb %p completed\n", xdp_ring->qid,
1917 tx_bytes += xdpf->len;
1919 total_done += tx_info->tx_descs;
1921 xdp_return_frame(xdpf);
1922 xdp_ring->free_ids[next_to_clean] = req_id;
1923 next_to_clean = ENA_TX_RING_IDX_NEXT(next_to_clean,
1924 xdp_ring->ring_size);
1927 xdp_ring->next_to_clean = next_to_clean;
1928 ena_com_comp_ack(xdp_ring->ena_com_io_sq, total_done);
1929 ena_com_update_dev_comp_head(xdp_ring->ena_com_io_cq);
1931 netif_dbg(xdp_ring->adapter, tx_done, xdp_ring->netdev,
1932 "tx_poll: q %d done. total pkts: %d\n",
1933 xdp_ring->qid, tx_pkts);
1938 static int ena_io_poll(struct napi_struct *napi, int budget)
1940 struct ena_napi *ena_napi = container_of(napi, struct ena_napi, napi);
1941 struct ena_ring *tx_ring, *rx_ring;
1943 int rx_work_done = 0;
1945 int napi_comp_call = 0;
1948 tx_ring = ena_napi->tx_ring;
1949 rx_ring = ena_napi->rx_ring;
1951 tx_budget = tx_ring->ring_size / ENA_TX_POLL_BUDGET_DIVIDER;
1953 if (!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1954 test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags)) {
1955 napi_complete_done(napi, 0);
1959 tx_work_done = ena_clean_tx_irq(tx_ring, tx_budget);
1960 /* On netpoll the budget is zero and the handler should only clean the
1964 rx_work_done = ena_clean_rx_irq(rx_ring, napi, budget);
1966 /* If the device is about to reset or down, avoid unmask
1967 * the interrupt and return 0 so NAPI won't reschedule
1969 if (unlikely(!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1970 test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags))) {
1971 napi_complete_done(napi, 0);
1974 } else if ((budget > rx_work_done) && (tx_budget > tx_work_done)) {
1977 /* Update numa and unmask the interrupt only when schedule
1978 * from the interrupt context (vs from sk_busy_loop)
1980 if (napi_complete_done(napi, rx_work_done) &&
1981 READ_ONCE(ena_napi->interrupts_masked)) {
1982 smp_rmb(); /* make sure interrupts_masked is read */
1983 WRITE_ONCE(ena_napi->interrupts_masked, false);
1984 /* We apply adaptive moderation on Rx path only.
1985 * Tx uses static interrupt moderation.
1987 if (ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev))
1988 ena_adjust_adaptive_rx_intr_moderation(ena_napi);
1990 ena_unmask_interrupt(tx_ring, rx_ring);
1993 ena_update_ring_numa_node(tx_ring, rx_ring);
2000 u64_stats_update_begin(&tx_ring->syncp);
2001 tx_ring->tx_stats.napi_comp += napi_comp_call;
2002 tx_ring->tx_stats.tx_poll++;
2003 u64_stats_update_end(&tx_ring->syncp);
2005 tx_ring->tx_stats.last_napi_jiffies = jiffies;
2010 static irqreturn_t ena_intr_msix_mgmnt(int irq, void *data)
2012 struct ena_adapter *adapter = (struct ena_adapter *)data;
2014 ena_com_admin_q_comp_intr_handler(adapter->ena_dev);
2016 /* Don't call the aenq handler before probe is done */
2017 if (likely(test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags)))
2018 ena_com_aenq_intr_handler(adapter->ena_dev, data);
2023 /* ena_intr_msix_io - MSI-X Interrupt Handler for Tx/Rx
2024 * @irq: interrupt number
2025 * @data: pointer to a network interface private napi device structure
2027 static irqreturn_t ena_intr_msix_io(int irq, void *data)
2029 struct ena_napi *ena_napi = data;
2031 /* Used to check HW health */
2032 WRITE_ONCE(ena_napi->first_interrupt, true);
2034 WRITE_ONCE(ena_napi->interrupts_masked, true);
2035 smp_wmb(); /* write interrupts_masked before calling napi */
2037 napi_schedule_irqoff(&ena_napi->napi);
2042 /* Reserve a single MSI-X vector for management (admin + aenq).
2043 * plus reserve one vector for each potential io queue.
2044 * the number of potential io queues is the minimum of what the device
2045 * supports and the number of vCPUs.
2047 static int ena_enable_msix(struct ena_adapter *adapter)
2049 int msix_vecs, irq_cnt;
2051 if (test_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags)) {
2052 netif_err(adapter, probe, adapter->netdev,
2053 "Error, MSI-X is already enabled\n");
2057 /* Reserved the max msix vectors we might need */
2058 msix_vecs = ENA_MAX_MSIX_VEC(adapter->max_num_io_queues);
2059 netif_dbg(adapter, probe, adapter->netdev,
2060 "Trying to enable MSI-X, vectors %d\n", msix_vecs);
2062 irq_cnt = pci_alloc_irq_vectors(adapter->pdev, ENA_MIN_MSIX_VEC,
2063 msix_vecs, PCI_IRQ_MSIX);
2066 netif_err(adapter, probe, adapter->netdev,
2067 "Failed to enable MSI-X. irq_cnt %d\n", irq_cnt);
2071 if (irq_cnt != msix_vecs) {
2072 netif_notice(adapter, probe, adapter->netdev,
2073 "Enable only %d MSI-X (out of %d), reduce the number of queues\n",
2074 irq_cnt, msix_vecs);
2075 adapter->num_io_queues = irq_cnt - ENA_ADMIN_MSIX_VEC;
2078 if (ena_init_rx_cpu_rmap(adapter))
2079 netif_warn(adapter, probe, adapter->netdev,
2080 "Failed to map IRQs to CPUs\n");
2082 adapter->msix_vecs = irq_cnt;
2083 set_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags);
2088 static void ena_setup_mgmnt_intr(struct ena_adapter *adapter)
2092 snprintf(adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].name,
2093 ENA_IRQNAME_SIZE, "ena-mgmnt@pci:%s",
2094 pci_name(adapter->pdev));
2095 adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].handler =
2096 ena_intr_msix_mgmnt;
2097 adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].data = adapter;
2098 adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].vector =
2099 pci_irq_vector(adapter->pdev, ENA_MGMNT_IRQ_IDX);
2100 cpu = cpumask_first(cpu_online_mask);
2101 adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].cpu = cpu;
2102 cpumask_set_cpu(cpu,
2103 &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].affinity_hint_mask);
2106 static void ena_setup_io_intr(struct ena_adapter *adapter)
2108 struct net_device *netdev;
2109 int irq_idx, i, cpu;
2112 netdev = adapter->netdev;
2113 io_queue_count = adapter->num_io_queues + adapter->xdp_num_queues;
2115 for (i = 0; i < io_queue_count; i++) {
2116 irq_idx = ENA_IO_IRQ_IDX(i);
2117 cpu = i % num_online_cpus();
2119 snprintf(adapter->irq_tbl[irq_idx].name, ENA_IRQNAME_SIZE,
2120 "%s-Tx-Rx-%d", netdev->name, i);
2121 adapter->irq_tbl[irq_idx].handler = ena_intr_msix_io;
2122 adapter->irq_tbl[irq_idx].data = &adapter->ena_napi[i];
2123 adapter->irq_tbl[irq_idx].vector =
2124 pci_irq_vector(adapter->pdev, irq_idx);
2125 adapter->irq_tbl[irq_idx].cpu = cpu;
2127 cpumask_set_cpu(cpu,
2128 &adapter->irq_tbl[irq_idx].affinity_hint_mask);
2132 static int ena_request_mgmnt_irq(struct ena_adapter *adapter)
2134 unsigned long flags = 0;
2135 struct ena_irq *irq;
2138 irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
2139 rc = request_irq(irq->vector, irq->handler, flags, irq->name,
2142 netif_err(adapter, probe, adapter->netdev,
2143 "Failed to request admin irq\n");
2147 netif_dbg(adapter, probe, adapter->netdev,
2148 "Set affinity hint of mgmnt irq.to 0x%lx (irq vector: %d)\n",
2149 irq->affinity_hint_mask.bits[0], irq->vector);
2151 irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
2156 static int ena_request_io_irq(struct ena_adapter *adapter)
2158 u32 io_queue_count = adapter->num_io_queues + adapter->xdp_num_queues;
2159 unsigned long flags = 0;
2160 struct ena_irq *irq;
2163 if (!test_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags)) {
2164 netif_err(adapter, ifup, adapter->netdev,
2165 "Failed to request I/O IRQ: MSI-X is not enabled\n");
2169 for (i = ENA_IO_IRQ_FIRST_IDX; i < ENA_MAX_MSIX_VEC(io_queue_count); i++) {
2170 irq = &adapter->irq_tbl[i];
2171 rc = request_irq(irq->vector, irq->handler, flags, irq->name,
2174 netif_err(adapter, ifup, adapter->netdev,
2175 "Failed to request I/O IRQ. index %d rc %d\n",
2180 netif_dbg(adapter, ifup, adapter->netdev,
2181 "Set affinity hint of irq. index %d to 0x%lx (irq vector: %d)\n",
2182 i, irq->affinity_hint_mask.bits[0], irq->vector);
2184 irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
2190 for (k = ENA_IO_IRQ_FIRST_IDX; k < i; k++) {
2191 irq = &adapter->irq_tbl[k];
2192 free_irq(irq->vector, irq->data);
2198 static void ena_free_mgmnt_irq(struct ena_adapter *adapter)
2200 struct ena_irq *irq;
2202 irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
2203 synchronize_irq(irq->vector);
2204 irq_set_affinity_hint(irq->vector, NULL);
2205 free_irq(irq->vector, irq->data);
2208 static void ena_free_io_irq(struct ena_adapter *adapter)
2210 u32 io_queue_count = adapter->num_io_queues + adapter->xdp_num_queues;
2211 struct ena_irq *irq;
2214 #ifdef CONFIG_RFS_ACCEL
2215 if (adapter->msix_vecs >= 1) {
2216 free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
2217 adapter->netdev->rx_cpu_rmap = NULL;
2219 #endif /* CONFIG_RFS_ACCEL */
2221 for (i = ENA_IO_IRQ_FIRST_IDX; i < ENA_MAX_MSIX_VEC(io_queue_count); i++) {
2222 irq = &adapter->irq_tbl[i];
2223 irq_set_affinity_hint(irq->vector, NULL);
2224 free_irq(irq->vector, irq->data);
2228 static void ena_disable_msix(struct ena_adapter *adapter)
2230 if (test_and_clear_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags))
2231 pci_free_irq_vectors(adapter->pdev);
2234 static void ena_disable_io_intr_sync(struct ena_adapter *adapter)
2236 u32 io_queue_count = adapter->num_io_queues + adapter->xdp_num_queues;
2239 if (!netif_running(adapter->netdev))
2242 for (i = ENA_IO_IRQ_FIRST_IDX; i < ENA_MAX_MSIX_VEC(io_queue_count); i++)
2243 synchronize_irq(adapter->irq_tbl[i].vector);
2246 static void ena_del_napi_in_range(struct ena_adapter *adapter,
2252 for (i = first_index; i < first_index + count; i++) {
2253 netif_napi_del(&adapter->ena_napi[i].napi);
2255 WARN_ON(!ENA_IS_XDP_INDEX(adapter, i) &&
2256 adapter->ena_napi[i].xdp_ring);
2260 static void ena_init_napi_in_range(struct ena_adapter *adapter,
2261 int first_index, int count)
2265 for (i = first_index; i < first_index + count; i++) {
2266 struct ena_napi *napi = &adapter->ena_napi[i];
2268 netif_napi_add(adapter->netdev,
2270 ENA_IS_XDP_INDEX(adapter, i) ? ena_xdp_io_poll : ena_io_poll,
2273 if (!ENA_IS_XDP_INDEX(adapter, i)) {
2274 napi->rx_ring = &adapter->rx_ring[i];
2275 napi->tx_ring = &adapter->tx_ring[i];
2277 napi->xdp_ring = &adapter->tx_ring[i];
2283 static void ena_napi_disable_in_range(struct ena_adapter *adapter,
2289 for (i = first_index; i < first_index + count; i++)
2290 napi_disable(&adapter->ena_napi[i].napi);
2293 static void ena_napi_enable_in_range(struct ena_adapter *adapter,
2299 for (i = first_index; i < first_index + count; i++)
2300 napi_enable(&adapter->ena_napi[i].napi);
2303 /* Configure the Rx forwarding */
2304 static int ena_rss_configure(struct ena_adapter *adapter)
2306 struct ena_com_dev *ena_dev = adapter->ena_dev;
2309 /* In case the RSS table wasn't initialized by probe */
2310 if (!ena_dev->rss.tbl_log_size) {
2311 rc = ena_rss_init_default(adapter);
2312 if (rc && (rc != -EOPNOTSUPP)) {
2313 netif_err(adapter, ifup, adapter->netdev,
2314 "Failed to init RSS rc: %d\n", rc);
2319 /* Set indirect table */
2320 rc = ena_com_indirect_table_set(ena_dev);
2321 if (unlikely(rc && rc != -EOPNOTSUPP))
2324 /* Configure hash function (if supported) */
2325 rc = ena_com_set_hash_function(ena_dev);
2326 if (unlikely(rc && (rc != -EOPNOTSUPP)))
2329 /* Configure hash inputs (if supported) */
2330 rc = ena_com_set_hash_ctrl(ena_dev);
2331 if (unlikely(rc && (rc != -EOPNOTSUPP)))
2337 static int ena_up_complete(struct ena_adapter *adapter)
2341 rc = ena_rss_configure(adapter);
2345 ena_change_mtu(adapter->netdev, adapter->netdev->mtu);
2347 ena_refill_all_rx_bufs(adapter);
2349 /* enable transmits */
2350 netif_tx_start_all_queues(adapter->netdev);
2352 ena_napi_enable_in_range(adapter,
2354 adapter->xdp_num_queues + adapter->num_io_queues);
2359 static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
2361 struct ena_com_create_io_ctx ctx;
2362 struct ena_com_dev *ena_dev;
2363 struct ena_ring *tx_ring;
2368 ena_dev = adapter->ena_dev;
2370 tx_ring = &adapter->tx_ring[qid];
2371 msix_vector = ENA_IO_IRQ_IDX(qid);
2372 ena_qid = ENA_IO_TXQ_IDX(qid);
2374 memset(&ctx, 0x0, sizeof(ctx));
2376 ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
2378 ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
2379 ctx.msix_vector = msix_vector;
2380 ctx.queue_size = tx_ring->ring_size;
2381 ctx.numa_node = cpu_to_node(tx_ring->cpu);
2383 rc = ena_com_create_io_queue(ena_dev, &ctx);
2385 netif_err(adapter, ifup, adapter->netdev,
2386 "Failed to create I/O TX queue num %d rc: %d\n",
2391 rc = ena_com_get_io_handlers(ena_dev, ena_qid,
2392 &tx_ring->ena_com_io_sq,
2393 &tx_ring->ena_com_io_cq);
2395 netif_err(adapter, ifup, adapter->netdev,
2396 "Failed to get TX queue handlers. TX queue num %d rc: %d\n",
2398 ena_com_destroy_io_queue(ena_dev, ena_qid);
2402 ena_com_update_numa_node(tx_ring->ena_com_io_cq, ctx.numa_node);
2406 static int ena_create_io_tx_queues_in_range(struct ena_adapter *adapter,
2407 int first_index, int count)
2409 struct ena_com_dev *ena_dev = adapter->ena_dev;
2412 for (i = first_index; i < first_index + count; i++) {
2413 rc = ena_create_io_tx_queue(adapter, i);
2421 while (i-- > first_index)
2422 ena_com_destroy_io_queue(ena_dev, ENA_IO_TXQ_IDX(i));
2427 static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
2429 struct ena_com_dev *ena_dev;
2430 struct ena_com_create_io_ctx ctx;
2431 struct ena_ring *rx_ring;
2436 ena_dev = adapter->ena_dev;
2438 rx_ring = &adapter->rx_ring[qid];
2439 msix_vector = ENA_IO_IRQ_IDX(qid);
2440 ena_qid = ENA_IO_RXQ_IDX(qid);
2442 memset(&ctx, 0x0, sizeof(ctx));
2445 ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
2446 ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2447 ctx.msix_vector = msix_vector;
2448 ctx.queue_size = rx_ring->ring_size;
2449 ctx.numa_node = cpu_to_node(rx_ring->cpu);
2451 rc = ena_com_create_io_queue(ena_dev, &ctx);
2453 netif_err(adapter, ifup, adapter->netdev,
2454 "Failed to create I/O RX queue num %d rc: %d\n",
2459 rc = ena_com_get_io_handlers(ena_dev, ena_qid,
2460 &rx_ring->ena_com_io_sq,
2461 &rx_ring->ena_com_io_cq);
2463 netif_err(adapter, ifup, adapter->netdev,
2464 "Failed to get RX queue handlers. RX queue num %d rc: %d\n",
2469 ena_com_update_numa_node(rx_ring->ena_com_io_cq, ctx.numa_node);
2473 ena_com_destroy_io_queue(ena_dev, ena_qid);
2477 static int ena_create_all_io_rx_queues(struct ena_adapter *adapter)
2479 struct ena_com_dev *ena_dev = adapter->ena_dev;
2482 for (i = 0; i < adapter->num_io_queues; i++) {
2483 rc = ena_create_io_rx_queue(adapter, i);
2486 INIT_WORK(&adapter->ena_napi[i].dim.work, ena_dim_work);
2493 cancel_work_sync(&adapter->ena_napi[i].dim.work);
2494 ena_com_destroy_io_queue(ena_dev, ENA_IO_RXQ_IDX(i));
2500 static void set_io_rings_size(struct ena_adapter *adapter,
2506 for (i = 0; i < adapter->num_io_queues; i++) {
2507 adapter->tx_ring[i].ring_size = new_tx_size;
2508 adapter->rx_ring[i].ring_size = new_rx_size;
2512 /* This function allows queue allocation to backoff when the system is
2513 * low on memory. If there is not enough memory to allocate io queues
2514 * the driver will try to allocate smaller queues.
2516 * The backoff algorithm is as follows:
2517 * 1. Try to allocate TX and RX and if successful.
2518 * 1.1. return success
2520 * 2. Divide by 2 the size of the larger of RX and TX queues (or both if their size is the same).
2522 * 3. If TX or RX is smaller than 256
2523 * 3.1. return failure.
2525 * 4.1. go back to 1.
2527 static int create_queues_with_size_backoff(struct ena_adapter *adapter)
2529 int rc, cur_rx_ring_size, cur_tx_ring_size;
2530 int new_rx_ring_size, new_tx_ring_size;
2532 /* current queue sizes might be set to smaller than the requested
2533 * ones due to past queue allocation failures.
2535 set_io_rings_size(adapter, adapter->requested_tx_ring_size,
2536 adapter->requested_rx_ring_size);
2539 if (ena_xdp_present(adapter)) {
2540 rc = ena_setup_and_create_all_xdp_queues(adapter);
2545 rc = ena_setup_tx_resources_in_range(adapter,
2547 adapter->num_io_queues);
2551 rc = ena_create_io_tx_queues_in_range(adapter,
2553 adapter->num_io_queues);
2555 goto err_create_tx_queues;
2557 rc = ena_setup_all_rx_resources(adapter);
2561 rc = ena_create_all_io_rx_queues(adapter);
2563 goto err_create_rx_queues;
2567 err_create_rx_queues:
2568 ena_free_all_io_rx_resources(adapter);
2570 ena_destroy_all_tx_queues(adapter);
2571 err_create_tx_queues:
2572 ena_free_all_io_tx_resources(adapter);
2574 if (rc != -ENOMEM) {
2575 netif_err(adapter, ifup, adapter->netdev,
2576 "Queue creation failed with error code %d\n",
2581 cur_tx_ring_size = adapter->tx_ring[0].ring_size;
2582 cur_rx_ring_size = adapter->rx_ring[0].ring_size;
2584 netif_err(adapter, ifup, adapter->netdev,
2585 "Not enough memory to create queues with sizes TX=%d, RX=%d\n",
2586 cur_tx_ring_size, cur_rx_ring_size);
2588 new_tx_ring_size = cur_tx_ring_size;
2589 new_rx_ring_size = cur_rx_ring_size;
2591 /* Decrease the size of the larger queue, or
2592 * decrease both if they are the same size.
2594 if (cur_rx_ring_size <= cur_tx_ring_size)
2595 new_tx_ring_size = cur_tx_ring_size / 2;
2596 if (cur_rx_ring_size >= cur_tx_ring_size)
2597 new_rx_ring_size = cur_rx_ring_size / 2;
2599 if (new_tx_ring_size < ENA_MIN_RING_SIZE ||
2600 new_rx_ring_size < ENA_MIN_RING_SIZE) {
2601 netif_err(adapter, ifup, adapter->netdev,
2602 "Queue creation failed with the smallest possible queue size of %d for both queues. Not retrying with smaller queues\n",
2607 netif_err(adapter, ifup, adapter->netdev,
2608 "Retrying queue creation with sizes TX=%d, RX=%d\n",
2612 set_io_rings_size(adapter, new_tx_ring_size,
2617 static int ena_up(struct ena_adapter *adapter)
2619 int io_queue_count, rc, i;
2621 netif_dbg(adapter, ifup, adapter->netdev, "%s\n", __func__);
2623 io_queue_count = adapter->num_io_queues + adapter->xdp_num_queues;
2624 ena_setup_io_intr(adapter);
2626 /* napi poll functions should be initialized before running
2627 * request_irq(), to handle a rare condition where there is a pending
2628 * interrupt, causing the ISR to fire immediately while the poll
2629 * function wasn't set yet, causing a null dereference
2631 ena_init_napi_in_range(adapter, 0, io_queue_count);
2633 rc = ena_request_io_irq(adapter);
2637 rc = create_queues_with_size_backoff(adapter);
2639 goto err_create_queues_with_backoff;
2641 rc = ena_up_complete(adapter);
2645 if (test_bit(ENA_FLAG_LINK_UP, &adapter->flags))
2646 netif_carrier_on(adapter->netdev);
2648 ena_increase_stat(&adapter->dev_stats.interface_up, 1,
2651 set_bit(ENA_FLAG_DEV_UP, &adapter->flags);
2653 /* Enable completion queues interrupt */
2654 for (i = 0; i < adapter->num_io_queues; i++)
2655 ena_unmask_interrupt(&adapter->tx_ring[i],
2656 &adapter->rx_ring[i]);
2658 /* schedule napi in case we had pending packets
2659 * from the last time we disable napi
2661 for (i = 0; i < io_queue_count; i++)
2662 napi_schedule(&adapter->ena_napi[i].napi);
2667 ena_destroy_all_tx_queues(adapter);
2668 ena_free_all_io_tx_resources(adapter);
2669 ena_destroy_all_rx_queues(adapter);
2670 ena_free_all_io_rx_resources(adapter);
2671 err_create_queues_with_backoff:
2672 ena_free_io_irq(adapter);
2674 ena_del_napi_in_range(adapter, 0, io_queue_count);
2679 static void ena_down(struct ena_adapter *adapter)
2681 int io_queue_count = adapter->num_io_queues + adapter->xdp_num_queues;
2683 netif_info(adapter, ifdown, adapter->netdev, "%s\n", __func__);
2685 clear_bit(ENA_FLAG_DEV_UP, &adapter->flags);
2687 ena_increase_stat(&adapter->dev_stats.interface_down, 1,
2690 netif_carrier_off(adapter->netdev);
2691 netif_tx_disable(adapter->netdev);
2693 /* After this point the napi handler won't enable the tx queue */
2694 ena_napi_disable_in_range(adapter, 0, io_queue_count);
2696 /* After destroy the queue there won't be any new interrupts */
2698 if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags)) {
2701 rc = ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
2703 netif_err(adapter, ifdown, adapter->netdev,
2704 "Device reset failed\n");
2705 /* stop submitting admin commands on a device that was reset */
2706 ena_com_set_admin_running_state(adapter->ena_dev, false);
2709 ena_destroy_all_io_queues(adapter);
2711 ena_disable_io_intr_sync(adapter);
2712 ena_free_io_irq(adapter);
2713 ena_del_napi_in_range(adapter, 0, io_queue_count);
2715 ena_free_all_tx_bufs(adapter);
2716 ena_free_all_rx_bufs(adapter);
2717 ena_free_all_io_tx_resources(adapter);
2718 ena_free_all_io_rx_resources(adapter);
2721 /* ena_open - Called when a network interface is made active
2722 * @netdev: network interface device structure
2724 * Returns 0 on success, negative value on failure
2726 * The open entry point is called when a network interface is made
2727 * active by the system (IFF_UP). At this point all resources needed
2728 * for transmit and receive operations are allocated, the interrupt
2729 * handler is registered with the OS, the watchdog timer is started,
2730 * and the stack is notified that the interface is ready.
2732 static int ena_open(struct net_device *netdev)
2734 struct ena_adapter *adapter = netdev_priv(netdev);
2737 /* Notify the stack of the actual queue counts. */
2738 rc = netif_set_real_num_tx_queues(netdev, adapter->num_io_queues);
2740 netif_err(adapter, ifup, netdev, "Can't set num tx queues\n");
2744 rc = netif_set_real_num_rx_queues(netdev, adapter->num_io_queues);
2746 netif_err(adapter, ifup, netdev, "Can't set num rx queues\n");
2750 rc = ena_up(adapter);
2757 /* ena_close - Disables a network interface
2758 * @netdev: network interface device structure
2760 * Returns 0, this is not allowed to fail
2762 * The close entry point is called when an interface is de-activated
2763 * by the OS. The hardware is still under the drivers control, but
2764 * needs to be disabled. A global MAC reset is issued to stop the
2765 * hardware, and all transmit and receive resources are freed.
2767 static int ena_close(struct net_device *netdev)
2769 struct ena_adapter *adapter = netdev_priv(netdev);
2771 netif_dbg(adapter, ifdown, netdev, "%s\n", __func__);
2773 if (!test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
2776 if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2779 /* Check for device status and issue reset if needed*/
2780 check_for_admin_com_state(adapter);
2781 if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
2782 netif_err(adapter, ifdown, adapter->netdev,
2783 "Destroy failure, restarting device\n");
2784 ena_dump_stats_to_dmesg(adapter);
2785 /* rtnl lock already obtained in dev_ioctl() layer */
2786 ena_destroy_device(adapter, false);
2787 ena_restore_device(adapter);
2793 int ena_update_queue_sizes(struct ena_adapter *adapter,
2799 dev_was_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
2800 ena_close(adapter->netdev);
2801 adapter->requested_tx_ring_size = new_tx_size;
2802 adapter->requested_rx_ring_size = new_rx_size;
2803 ena_init_io_rings(adapter,
2805 adapter->xdp_num_queues +
2806 adapter->num_io_queues);
2807 return dev_was_up ? ena_up(adapter) : 0;
2810 int ena_update_queue_count(struct ena_adapter *adapter, u32 new_channel_count)
2812 struct ena_com_dev *ena_dev = adapter->ena_dev;
2813 int prev_channel_count;
2816 dev_was_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
2817 ena_close(adapter->netdev);
2818 prev_channel_count = adapter->num_io_queues;
2819 adapter->num_io_queues = new_channel_count;
2820 if (ena_xdp_present(adapter) &&
2821 ena_xdp_allowed(adapter) == ENA_XDP_ALLOWED) {
2822 adapter->xdp_first_ring = new_channel_count;
2823 adapter->xdp_num_queues = new_channel_count;
2824 if (prev_channel_count > new_channel_count)
2825 ena_xdp_exchange_program_rx_in_range(adapter,
2828 prev_channel_count);
2830 ena_xdp_exchange_program_rx_in_range(adapter,
2831 adapter->xdp_bpf_prog,
2836 /* We need to destroy the rss table so that the indirection
2837 * table will be reinitialized by ena_up()
2839 ena_com_rss_destroy(ena_dev);
2840 ena_init_io_rings(adapter,
2842 adapter->xdp_num_queues +
2843 adapter->num_io_queues);
2844 return dev_was_up ? ena_open(adapter->netdev) : 0;
2847 static void ena_tx_csum(struct ena_com_tx_ctx *ena_tx_ctx,
2848 struct sk_buff *skb,
2849 bool disable_meta_caching)
2851 u32 mss = skb_shinfo(skb)->gso_size;
2852 struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta;
2855 if ((skb->ip_summed == CHECKSUM_PARTIAL) || mss) {
2856 ena_tx_ctx->l4_csum_enable = 1;
2858 ena_tx_ctx->tso_enable = 1;
2859 ena_meta->l4_hdr_len = tcp_hdr(skb)->doff;
2860 ena_tx_ctx->l4_csum_partial = 0;
2862 ena_tx_ctx->tso_enable = 0;
2863 ena_meta->l4_hdr_len = 0;
2864 ena_tx_ctx->l4_csum_partial = 1;
2867 switch (ip_hdr(skb)->version) {
2869 ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4;
2870 if (ip_hdr(skb)->frag_off & htons(IP_DF))
2873 ena_tx_ctx->l3_csum_enable = 1;
2874 l4_protocol = ip_hdr(skb)->protocol;
2877 ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV6;
2878 l4_protocol = ipv6_hdr(skb)->nexthdr;
2884 if (l4_protocol == IPPROTO_TCP)
2885 ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_TCP;
2887 ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UDP;
2889 ena_meta->mss = mss;
2890 ena_meta->l3_hdr_len = skb_network_header_len(skb);
2891 ena_meta->l3_hdr_offset = skb_network_offset(skb);
2892 ena_tx_ctx->meta_valid = 1;
2893 } else if (disable_meta_caching) {
2894 memset(ena_meta, 0, sizeof(*ena_meta));
2895 ena_tx_ctx->meta_valid = 1;
2897 ena_tx_ctx->meta_valid = 0;
2901 static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
2902 struct sk_buff *skb)
2904 int num_frags, header_len, rc;
2906 num_frags = skb_shinfo(skb)->nr_frags;
2907 header_len = skb_headlen(skb);
2909 if (num_frags < tx_ring->sgl_size)
2912 if ((num_frags == tx_ring->sgl_size) &&
2913 (header_len < tx_ring->tx_max_header_size))
2916 ena_increase_stat(&tx_ring->tx_stats.linearize, 1, &tx_ring->syncp);
2918 rc = skb_linearize(skb);
2920 ena_increase_stat(&tx_ring->tx_stats.linearize_failed, 1,
2927 static int ena_tx_map_skb(struct ena_ring *tx_ring,
2928 struct ena_tx_buffer *tx_info,
2929 struct sk_buff *skb,
2933 struct ena_adapter *adapter = tx_ring->adapter;
2934 struct ena_com_buf *ena_buf;
2936 u32 skb_head_len, frag_len, last_frag;
2941 skb_head_len = skb_headlen(skb);
2943 ena_buf = tx_info->bufs;
2945 if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2946 /* When the device is LLQ mode, the driver will copy
2947 * the header into the device memory space.
2948 * the ena_com layer assume the header is in a linear
2950 * This assumption might be wrong since part of the header
2951 * can be in the fragmented buffers.
2952 * Use skb_header_pointer to make sure the header is in a
2953 * linear memory space.
2956 push_len = min_t(u32, skb->len, tx_ring->tx_max_header_size);
2957 *push_hdr = skb_header_pointer(skb, 0, push_len,
2958 tx_ring->push_buf_intermediate_buf);
2959 *header_len = push_len;
2960 if (unlikely(skb->data != *push_hdr)) {
2961 ena_increase_stat(&tx_ring->tx_stats.llq_buffer_copy, 1,
2964 delta = push_len - skb_head_len;
2968 *header_len = min_t(u32, skb_head_len,
2969 tx_ring->tx_max_header_size);
2972 netif_dbg(adapter, tx_queued, adapter->netdev,
2973 "skb: %p header_buf->vaddr: %p push_len: %d\n", skb,
2974 *push_hdr, push_len);
2976 if (skb_head_len > push_len) {
2977 dma = dma_map_single(tx_ring->dev, skb->data + push_len,
2978 skb_head_len - push_len, DMA_TO_DEVICE);
2979 if (unlikely(dma_mapping_error(tx_ring->dev, dma)))
2980 goto error_report_dma_error;
2982 ena_buf->paddr = dma;
2983 ena_buf->len = skb_head_len - push_len;
2986 tx_info->num_of_bufs++;
2987 tx_info->map_linear_data = 1;
2989 tx_info->map_linear_data = 0;
2992 last_frag = skb_shinfo(skb)->nr_frags;
2994 for (i = 0; i < last_frag; i++) {
2995 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2997 frag_len = skb_frag_size(frag);
2999 if (unlikely(delta >= frag_len)) {
3004 dma = skb_frag_dma_map(tx_ring->dev, frag, delta,
3005 frag_len - delta, DMA_TO_DEVICE);
3006 if (unlikely(dma_mapping_error(tx_ring->dev, dma)))
3007 goto error_report_dma_error;
3009 ena_buf->paddr = dma;
3010 ena_buf->len = frag_len - delta;
3012 tx_info->num_of_bufs++;
3018 error_report_dma_error:
3019 ena_increase_stat(&tx_ring->tx_stats.dma_mapping_err, 1,
3021 netif_warn(adapter, tx_queued, adapter->netdev, "Failed to map skb\n");
3023 tx_info->skb = NULL;
3025 tx_info->num_of_bufs += i;
3026 ena_unmap_tx_buff(tx_ring, tx_info);
3031 /* Called with netif_tx_lock. */
3032 static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
3034 struct ena_adapter *adapter = netdev_priv(dev);
3035 struct ena_tx_buffer *tx_info;
3036 struct ena_com_tx_ctx ena_tx_ctx;
3037 struct ena_ring *tx_ring;
3038 struct netdev_queue *txq;
3040 u16 next_to_use, req_id, header_len;
3043 netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
3044 /* Determine which tx ring we will be placed on */
3045 qid = skb_get_queue_mapping(skb);
3046 tx_ring = &adapter->tx_ring[qid];
3047 txq = netdev_get_tx_queue(dev, qid);
3049 rc = ena_check_and_linearize_skb(tx_ring, skb);
3051 goto error_drop_packet;
3053 skb_tx_timestamp(skb);
3055 next_to_use = tx_ring->next_to_use;
3056 req_id = tx_ring->free_ids[next_to_use];
3057 tx_info = &tx_ring->tx_buffer_info[req_id];
3058 tx_info->num_of_bufs = 0;
3060 WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);
3062 rc = ena_tx_map_skb(tx_ring, tx_info, skb, &push_hdr, &header_len);
3064 goto error_drop_packet;
3066 memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
3067 ena_tx_ctx.ena_bufs = tx_info->bufs;
3068 ena_tx_ctx.push_header = push_hdr;
3069 ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
3070 ena_tx_ctx.req_id = req_id;
3071 ena_tx_ctx.header_len = header_len;
3073 /* set flags and meta data */
3074 ena_tx_csum(&ena_tx_ctx, skb, tx_ring->disable_meta_caching);
3076 rc = ena_xmit_common(dev,
3083 goto error_unmap_dma;
3085 netdev_tx_sent_queue(txq, skb->len);
3087 /* stop the queue when no more space available, the packet can have up
3088 * to sgl_size + 2. one for the meta descriptor and one for header
3089 * (if the header is larger than tx_max_header_size).
3091 if (unlikely(!ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
3092 tx_ring->sgl_size + 2))) {
3093 netif_dbg(adapter, tx_queued, dev, "%s stop queue %d\n",
3096 netif_tx_stop_queue(txq);
3097 ena_increase_stat(&tx_ring->tx_stats.queue_stop, 1,
3100 /* There is a rare condition where this function decide to
3101 * stop the queue but meanwhile clean_tx_irq updates
3102 * next_to_completion and terminates.
3103 * The queue will remain stopped forever.
3104 * To solve this issue add a mb() to make sure that
3105 * netif_tx_stop_queue() write is vissible before checking if
3106 * there is additional space in the queue.
3110 if (ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
3111 ENA_TX_WAKEUP_THRESH)) {
3112 netif_tx_wake_queue(txq);
3113 ena_increase_stat(&tx_ring->tx_stats.queue_wakeup, 1,
3118 if (netif_xmit_stopped(txq) || !netdev_xmit_more())
3119 /* trigger the dma engine. ena_ring_tx_doorbell()
3120 * calls a memory barrier inside it.
3122 ena_ring_tx_doorbell(tx_ring);
3124 return NETDEV_TX_OK;
3127 ena_unmap_tx_buff(tx_ring, tx_info);
3128 tx_info->skb = NULL;
3132 return NETDEV_TX_OK;
3135 static u16 ena_select_queue(struct net_device *dev, struct sk_buff *skb,
3136 struct net_device *sb_dev)
3139 /* we suspect that this is good for in--kernel network services that
3140 * want to loop incoming skb rx to tx in normal user generated traffic,
3141 * most probably we will not get to this
3143 if (skb_rx_queue_recorded(skb))
3144 qid = skb_get_rx_queue(skb);
3146 qid = netdev_pick_tx(dev, skb, NULL);
3151 static void ena_config_host_info(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
3153 struct device *dev = &pdev->dev;
3154 struct ena_admin_host_info *host_info;
3157 /* Allocate only the host info */
3158 rc = ena_com_allocate_host_info(ena_dev);
3160 dev_err(dev, "Cannot allocate host info\n");
3164 host_info = ena_dev->host_attr.host_info;
3166 host_info->bdf = (pdev->bus->number << 8) | pdev->devfn;
3167 host_info->os_type = ENA_ADMIN_OS_LINUX;
3168 host_info->kernel_ver = LINUX_VERSION_CODE;
3169 strlcpy(host_info->kernel_ver_str, utsname()->version,
3170 sizeof(host_info->kernel_ver_str) - 1);
3171 host_info->os_dist = 0;
3172 strncpy(host_info->os_dist_str, utsname()->release,
3173 sizeof(host_info->os_dist_str) - 1);
3174 host_info->driver_version =
3175 (DRV_MODULE_GEN_MAJOR) |
3176 (DRV_MODULE_GEN_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
3177 (DRV_MODULE_GEN_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT) |
3178 ("K"[0] << ENA_ADMIN_HOST_INFO_MODULE_TYPE_SHIFT);
3179 host_info->num_cpus = num_online_cpus();
3181 host_info->driver_supported_features =
3182 ENA_ADMIN_HOST_INFO_RX_OFFSET_MASK |
3183 ENA_ADMIN_HOST_INFO_INTERRUPT_MODERATION_MASK |
3184 ENA_ADMIN_HOST_INFO_RX_BUF_MIRRORING_MASK |
3185 ENA_ADMIN_HOST_INFO_RSS_CONFIGURABLE_FUNCTION_KEY_MASK;
3187 rc = ena_com_set_host_attributes(ena_dev);
3189 if (rc == -EOPNOTSUPP)
3190 dev_warn(dev, "Cannot set host attributes\n");
3192 dev_err(dev, "Cannot set host attributes\n");
3200 ena_com_delete_host_info(ena_dev);
3203 static void ena_config_debug_area(struct ena_adapter *adapter)
3205 u32 debug_area_size;
3208 ss_count = ena_get_sset_count(adapter->netdev, ETH_SS_STATS);
3209 if (ss_count <= 0) {
3210 netif_err(adapter, drv, adapter->netdev,
3211 "SS count is negative\n");
3215 /* allocate 32 bytes for each string and 64bit for the value */
3216 debug_area_size = ss_count * ETH_GSTRING_LEN + sizeof(u64) * ss_count;
3218 rc = ena_com_allocate_debug_area(adapter->ena_dev, debug_area_size);
3220 netif_err(adapter, drv, adapter->netdev,
3221 "Cannot allocate debug area\n");
3225 rc = ena_com_set_host_attributes(adapter->ena_dev);
3227 if (rc == -EOPNOTSUPP)
3228 netif_warn(adapter, drv, adapter->netdev,
3229 "Cannot set host attributes\n");
3231 netif_err(adapter, drv, adapter->netdev,
3232 "Cannot set host attributes\n");
3238 ena_com_delete_debug_area(adapter->ena_dev);
3241 int ena_update_hw_stats(struct ena_adapter *adapter)
3245 rc = ena_com_get_eni_stats(adapter->ena_dev, &adapter->eni_stats);
3247 netdev_err(adapter->netdev, "Failed to get ENI stats\n");
3254 static void ena_get_stats64(struct net_device *netdev,
3255 struct rtnl_link_stats64 *stats)
3257 struct ena_adapter *adapter = netdev_priv(netdev);
3258 struct ena_ring *rx_ring, *tx_ring;
3264 if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
3267 for (i = 0; i < adapter->num_io_queues; i++) {
3270 tx_ring = &adapter->tx_ring[i];
3273 start = u64_stats_fetch_begin_irq(&tx_ring->syncp);
3274 packets = tx_ring->tx_stats.cnt;
3275 bytes = tx_ring->tx_stats.bytes;
3276 } while (u64_stats_fetch_retry_irq(&tx_ring->syncp, start));
3278 stats->tx_packets += packets;
3279 stats->tx_bytes += bytes;
3281 rx_ring = &adapter->rx_ring[i];
3284 start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
3285 packets = rx_ring->rx_stats.cnt;
3286 bytes = rx_ring->rx_stats.bytes;
3287 } while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));
3289 stats->rx_packets += packets;
3290 stats->rx_bytes += bytes;
3294 start = u64_stats_fetch_begin_irq(&adapter->syncp);
3295 rx_drops = adapter->dev_stats.rx_drops;
3296 tx_drops = adapter->dev_stats.tx_drops;
3297 } while (u64_stats_fetch_retry_irq(&adapter->syncp, start));
3299 stats->rx_dropped = rx_drops;
3300 stats->tx_dropped = tx_drops;
3302 stats->multicast = 0;
3303 stats->collisions = 0;
3305 stats->rx_length_errors = 0;
3306 stats->rx_crc_errors = 0;
3307 stats->rx_frame_errors = 0;
3308 stats->rx_fifo_errors = 0;
3309 stats->rx_missed_errors = 0;
3310 stats->tx_window_errors = 0;
3312 stats->rx_errors = 0;
3313 stats->tx_errors = 0;
3316 static const struct net_device_ops ena_netdev_ops = {
3317 .ndo_open = ena_open,
3318 .ndo_stop = ena_close,
3319 .ndo_start_xmit = ena_start_xmit,
3320 .ndo_select_queue = ena_select_queue,
3321 .ndo_get_stats64 = ena_get_stats64,
3322 .ndo_tx_timeout = ena_tx_timeout,
3323 .ndo_change_mtu = ena_change_mtu,
3324 .ndo_set_mac_address = NULL,
3325 .ndo_validate_addr = eth_validate_addr,
3327 .ndo_xdp_xmit = ena_xdp_xmit,
3330 static int ena_device_validate_params(struct ena_adapter *adapter,
3331 struct ena_com_dev_get_features_ctx *get_feat_ctx)
3333 struct net_device *netdev = adapter->netdev;
3336 rc = ether_addr_equal(get_feat_ctx->dev_attr.mac_addr,
3339 netif_err(adapter, drv, netdev,
3340 "Error, mac address are different\n");
3344 if (get_feat_ctx->dev_attr.max_mtu < netdev->mtu) {
3345 netif_err(adapter, drv, netdev,
3346 "Error, device max mtu is smaller than netdev MTU\n");
3353 static void set_default_llq_configurations(struct ena_llq_configurations *llq_config)
3355 llq_config->llq_header_location = ENA_ADMIN_INLINE_HEADER;
3356 llq_config->llq_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
3357 llq_config->llq_num_decs_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
3358 llq_config->llq_ring_entry_size = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
3359 llq_config->llq_ring_entry_size_value = 128;
3362 static int ena_set_queues_placement_policy(struct pci_dev *pdev,
3363 struct ena_com_dev *ena_dev,
3364 struct ena_admin_feature_llq_desc *llq,
3365 struct ena_llq_configurations *llq_default_configurations)
3368 u32 llq_feature_mask;
3370 llq_feature_mask = 1 << ENA_ADMIN_LLQ;
3371 if (!(ena_dev->supported_features & llq_feature_mask)) {
3372 dev_warn(&pdev->dev,
3373 "LLQ is not supported Fallback to host mode policy.\n");
3374 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
3378 rc = ena_com_config_dev_mode(ena_dev, llq, llq_default_configurations);
3381 "Failed to configure the device mode. Fallback to host mode policy.\n");
3382 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
3388 static int ena_map_llq_mem_bar(struct pci_dev *pdev, struct ena_com_dev *ena_dev,
3391 bool has_mem_bar = !!(bars & BIT(ENA_MEM_BAR));
3394 if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
3396 "ENA device does not expose LLQ bar. Fallback to host mode policy.\n");
3397 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
3403 ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
3404 pci_resource_start(pdev, ENA_MEM_BAR),
3405 pci_resource_len(pdev, ENA_MEM_BAR));
3407 if (!ena_dev->mem_bar)
3413 static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
3414 struct ena_com_dev_get_features_ctx *get_feat_ctx,
3417 struct ena_llq_configurations llq_config;
3418 struct device *dev = &pdev->dev;
3419 bool readless_supported;
3424 rc = ena_com_mmio_reg_read_request_init(ena_dev);
3426 dev_err(dev, "Failed to init mmio read less\n");
3430 /* The PCIe configuration space revision id indicate if mmio reg
3433 readless_supported = !(pdev->revision & ENA_MMIO_DISABLE_REG_READ);
3434 ena_com_set_mmio_read_mode(ena_dev, readless_supported);
3436 rc = ena_com_dev_reset(ena_dev, ENA_REGS_RESET_NORMAL);
3438 dev_err(dev, "Can not reset device\n");
3439 goto err_mmio_read_less;
3442 rc = ena_com_validate_version(ena_dev);
3444 dev_err(dev, "Device version is too low\n");
3445 goto err_mmio_read_less;
3448 dma_width = ena_com_get_dma_width(ena_dev);
3449 if (dma_width < 0) {
3450 dev_err(dev, "Invalid dma width value %d", dma_width);
3452 goto err_mmio_read_less;
3455 rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(dma_width));
3457 dev_err(dev, "dma_set_mask_and_coherent failed %d\n", rc);
3458 goto err_mmio_read_less;
3461 /* ENA admin level init */
3462 rc = ena_com_admin_init(ena_dev, &aenq_handlers);
3465 "Can not initialize ena admin queue with device\n");
3466 goto err_mmio_read_less;
3469 /* To enable the msix interrupts the driver needs to know the number
3470 * of queues. So the driver uses polling mode to retrieve this
3473 ena_com_set_admin_polling_mode(ena_dev, true);
3475 ena_config_host_info(ena_dev, pdev);
3477 /* Get Device Attributes*/
3478 rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
3480 dev_err(dev, "Cannot get attribute for ena device rc=%d\n", rc);
3481 goto err_admin_init;
3484 /* Try to turn all the available aenq groups */
3485 aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE) |
3486 BIT(ENA_ADMIN_FATAL_ERROR) |
3487 BIT(ENA_ADMIN_WARNING) |
3488 BIT(ENA_ADMIN_NOTIFICATION) |
3489 BIT(ENA_ADMIN_KEEP_ALIVE);
3491 aenq_groups &= get_feat_ctx->aenq.supported_groups;
3493 rc = ena_com_set_aenq_config(ena_dev, aenq_groups);
3495 dev_err(dev, "Cannot configure aenq groups rc= %d\n", rc);
3496 goto err_admin_init;
3499 *wd_state = !!(aenq_groups & BIT(ENA_ADMIN_KEEP_ALIVE));
3501 set_default_llq_configurations(&llq_config);
3503 rc = ena_set_queues_placement_policy(pdev, ena_dev, &get_feat_ctx->llq,
3506 dev_err(dev, "ENA device init failed\n");
3507 goto err_admin_init;
3513 ena_com_delete_host_info(ena_dev);
3514 ena_com_admin_destroy(ena_dev);
3516 ena_com_mmio_reg_read_request_destroy(ena_dev);
3521 static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *adapter)
3523 struct ena_com_dev *ena_dev = adapter->ena_dev;
3524 struct device *dev = &adapter->pdev->dev;
3527 rc = ena_enable_msix(adapter);
3529 dev_err(dev, "Can not reserve msix vectors\n");
3533 ena_setup_mgmnt_intr(adapter);
3535 rc = ena_request_mgmnt_irq(adapter);
3537 dev_err(dev, "Can not setup management interrupts\n");
3538 goto err_disable_msix;
3541 ena_com_set_admin_polling_mode(ena_dev, false);
3543 ena_com_admin_aenq_enable(ena_dev);
3548 ena_disable_msix(adapter);
3553 static void ena_destroy_device(struct ena_adapter *adapter, bool graceful)
3555 struct net_device *netdev = adapter->netdev;
3556 struct ena_com_dev *ena_dev = adapter->ena_dev;
3559 if (!test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
3562 netif_carrier_off(netdev);
3564 del_timer_sync(&adapter->timer_service);
3566 dev_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
3567 adapter->dev_up_before_reset = dev_up;
3569 ena_com_set_admin_running_state(ena_dev, false);
3571 if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
3574 /* Stop the device from sending AENQ events (in case reset flag is set
3575 * and device is up, ena_down() already reset the device.
3577 if (!(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags) && dev_up))
3578 ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
3580 ena_free_mgmnt_irq(adapter);
3582 ena_disable_msix(adapter);
3584 ena_com_abort_admin_commands(ena_dev);
3586 ena_com_wait_for_abort_completion(ena_dev);
3588 ena_com_admin_destroy(ena_dev);
3590 ena_com_mmio_reg_read_request_destroy(ena_dev);
3592 /* return reset reason to default value */
3593 adapter->reset_reason = ENA_REGS_RESET_NORMAL;
3595 clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
3596 clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
3599 static int ena_restore_device(struct ena_adapter *adapter)
3601 struct ena_com_dev_get_features_ctx get_feat_ctx;
3602 struct ena_com_dev *ena_dev = adapter->ena_dev;
3603 struct pci_dev *pdev = adapter->pdev;
3607 set_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags);
3608 rc = ena_device_init(ena_dev, adapter->pdev, &get_feat_ctx, &wd_state);
3610 dev_err(&pdev->dev, "Can not initialize device\n");
3613 adapter->wd_state = wd_state;
3615 rc = ena_device_validate_params(adapter, &get_feat_ctx);
3617 dev_err(&pdev->dev, "Validation of device parameters failed\n");
3618 goto err_device_destroy;
3621 rc = ena_enable_msix_and_set_admin_interrupts(adapter);
3623 dev_err(&pdev->dev, "Enable MSI-X failed\n");
3624 goto err_device_destroy;
3626 /* If the interface was up before the reset bring it up */
3627 if (adapter->dev_up_before_reset) {
3628 rc = ena_up(adapter);
3630 dev_err(&pdev->dev, "Failed to create I/O queues\n");
3631 goto err_disable_msix;
3635 set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
3637 clear_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags);
3638 if (test_bit(ENA_FLAG_LINK_UP, &adapter->flags))
3639 netif_carrier_on(adapter->netdev);
3641 mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
3642 adapter->last_keep_alive_jiffies = jiffies;
3646 ena_free_mgmnt_irq(adapter);
3647 ena_disable_msix(adapter);
3649 ena_com_abort_admin_commands(ena_dev);
3650 ena_com_wait_for_abort_completion(ena_dev);
3651 ena_com_admin_destroy(ena_dev);
3652 ena_com_dev_reset(ena_dev, ENA_REGS_RESET_DRIVER_INVALID_STATE);
3653 ena_com_mmio_reg_read_request_destroy(ena_dev);
3655 clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
3656 clear_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags);
3658 "Reset attempt failed. Can not reset the device\n");
3663 static void ena_fw_reset_device(struct work_struct *work)
3665 struct ena_adapter *adapter =
3666 container_of(work, struct ena_adapter, reset_task);
3670 if (likely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
3671 ena_destroy_device(adapter, false);
3672 ena_restore_device(adapter);
3674 dev_err(&adapter->pdev->dev, "Device reset completed successfully\n");
3680 static int check_for_rx_interrupt_queue(struct ena_adapter *adapter,
3681 struct ena_ring *rx_ring)
3683 struct ena_napi *ena_napi = container_of(rx_ring->napi, struct ena_napi, napi);
3685 if (likely(READ_ONCE(ena_napi->first_interrupt)))
3688 if (ena_com_cq_empty(rx_ring->ena_com_io_cq))
3691 rx_ring->no_interrupt_event_cnt++;
3693 if (rx_ring->no_interrupt_event_cnt == ENA_MAX_NO_INTERRUPT_ITERATIONS) {
3694 netif_err(adapter, rx_err, adapter->netdev,
3695 "Potential MSIX issue on Rx side Queue = %d. Reset the device\n",
3698 ena_reset_device(adapter, ENA_REGS_RESET_MISS_INTERRUPT);
3705 static int check_missing_comp_in_tx_queue(struct ena_adapter *adapter,
3706 struct ena_ring *tx_ring)
3708 struct ena_napi *ena_napi = container_of(tx_ring->napi, struct ena_napi, napi);
3709 unsigned int time_since_last_napi;
3710 unsigned int missing_tx_comp_to;
3711 bool is_tx_comp_time_expired;
3712 struct ena_tx_buffer *tx_buf;
3713 unsigned long last_jiffies;
3717 for (i = 0; i < tx_ring->ring_size; i++) {
3718 tx_buf = &tx_ring->tx_buffer_info[i];
3719 last_jiffies = tx_buf->last_jiffies;
3721 if (last_jiffies == 0)
3722 /* no pending Tx at this location */
3725 is_tx_comp_time_expired = time_is_before_jiffies(last_jiffies +
3726 2 * adapter->missing_tx_completion_to);
3728 if (unlikely(!READ_ONCE(ena_napi->first_interrupt) && is_tx_comp_time_expired)) {
3729 /* If after graceful period interrupt is still not
3730 * received, we schedule a reset
3732 netif_err(adapter, tx_err, adapter->netdev,
3733 "Potential MSIX issue on Tx side Queue = %d. Reset the device\n",
3735 ena_reset_device(adapter, ENA_REGS_RESET_MISS_INTERRUPT);
3739 is_tx_comp_time_expired = time_is_before_jiffies(last_jiffies +
3740 adapter->missing_tx_completion_to);
3742 if (unlikely(is_tx_comp_time_expired)) {
3743 if (!tx_buf->print_once) {
3744 time_since_last_napi = jiffies_to_usecs(jiffies - tx_ring->tx_stats.last_napi_jiffies);
3745 missing_tx_comp_to = jiffies_to_msecs(adapter->missing_tx_completion_to);
3746 netif_notice(adapter, tx_err, adapter->netdev,
3747 "Found a Tx that wasn't completed on time, qid %d, index %d. %u usecs have passed since last napi execution. Missing Tx timeout value %u msecs\n",
3748 tx_ring->qid, i, time_since_last_napi, missing_tx_comp_to);
3751 tx_buf->print_once = 1;
3756 if (unlikely(missed_tx > adapter->missing_tx_completion_threshold)) {
3757 netif_err(adapter, tx_err, adapter->netdev,
3758 "The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
3760 adapter->missing_tx_completion_threshold);
3761 ena_reset_device(adapter, ENA_REGS_RESET_MISS_TX_CMPL);
3765 ena_increase_stat(&tx_ring->tx_stats.missed_tx, missed_tx,
3771 static void check_for_missing_completions(struct ena_adapter *adapter)
3773 struct ena_ring *tx_ring;
3774 struct ena_ring *rx_ring;
3778 io_queue_count = adapter->xdp_num_queues + adapter->num_io_queues;
3779 /* Make sure the driver doesn't turn the device in other process */
3782 if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
3785 if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
3788 if (adapter->missing_tx_completion_to == ENA_HW_HINTS_NO_TIMEOUT)
3791 budget = ENA_MONITORED_TX_QUEUES;
3793 for (i = adapter->last_monitored_tx_qid; i < io_queue_count; i++) {
3794 tx_ring = &adapter->tx_ring[i];
3795 rx_ring = &adapter->rx_ring[i];
3797 rc = check_missing_comp_in_tx_queue(adapter, tx_ring);
3801 rc = !ENA_IS_XDP_INDEX(adapter, i) ?
3802 check_for_rx_interrupt_queue(adapter, rx_ring) : 0;
3811 adapter->last_monitored_tx_qid = i % io_queue_count;
3814 /* trigger napi schedule after 2 consecutive detections */
3815 #define EMPTY_RX_REFILL 2
3816 /* For the rare case where the device runs out of Rx descriptors and the
3817 * napi handler failed to refill new Rx descriptors (due to a lack of memory
3819 * This case will lead to a deadlock:
3820 * The device won't send interrupts since all the new Rx packets will be dropped
3821 * The napi handler won't allocate new Rx descriptors so the device will be
3822 * able to send new packets.
3824 * This scenario can happen when the kernel's vm.min_free_kbytes is too small.
3825 * It is recommended to have at least 512MB, with a minimum of 128MB for
3826 * constrained environment).
3828 * When such a situation is detected - Reschedule napi
3830 static void check_for_empty_rx_ring(struct ena_adapter *adapter)
3832 struct ena_ring *rx_ring;
3833 int i, refill_required;
3835 if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
3838 if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
3841 for (i = 0; i < adapter->num_io_queues; i++) {
3842 rx_ring = &adapter->rx_ring[i];
3844 refill_required = ena_com_free_q_entries(rx_ring->ena_com_io_sq);
3845 if (unlikely(refill_required == (rx_ring->ring_size - 1))) {
3846 rx_ring->empty_rx_queue++;
3848 if (rx_ring->empty_rx_queue >= EMPTY_RX_REFILL) {
3849 ena_increase_stat(&rx_ring->rx_stats.empty_rx_ring, 1,
3852 netif_err(adapter, drv, adapter->netdev,
3853 "Trigger refill for ring %d\n", i);
3855 napi_schedule(rx_ring->napi);
3856 rx_ring->empty_rx_queue = 0;
3859 rx_ring->empty_rx_queue = 0;
3864 /* Check for keep alive expiration */
3865 static void check_for_missing_keep_alive(struct ena_adapter *adapter)
3867 unsigned long keep_alive_expired;
3869 if (!adapter->wd_state)
3872 if (adapter->keep_alive_timeout == ENA_HW_HINTS_NO_TIMEOUT)
3875 keep_alive_expired = adapter->last_keep_alive_jiffies +
3876 adapter->keep_alive_timeout;
3877 if (unlikely(time_is_before_jiffies(keep_alive_expired))) {
3878 netif_err(adapter, drv, adapter->netdev,
3879 "Keep alive watchdog timeout.\n");
3880 ena_increase_stat(&adapter->dev_stats.wd_expired, 1,
3882 ena_reset_device(adapter, ENA_REGS_RESET_KEEP_ALIVE_TO);
3886 static void check_for_admin_com_state(struct ena_adapter *adapter)
3888 if (unlikely(!ena_com_get_admin_running_state(adapter->ena_dev))) {
3889 netif_err(adapter, drv, adapter->netdev,
3890 "ENA admin queue is not in running state!\n");
3891 ena_increase_stat(&adapter->dev_stats.admin_q_pause, 1,
3893 ena_reset_device(adapter, ENA_REGS_RESET_ADMIN_TO);
3897 static void ena_update_hints(struct ena_adapter *adapter,
3898 struct ena_admin_ena_hw_hints *hints)
3900 struct net_device *netdev = adapter->netdev;
3902 if (hints->admin_completion_tx_timeout)
3903 adapter->ena_dev->admin_queue.completion_timeout =
3904 hints->admin_completion_tx_timeout * 1000;
3906 if (hints->mmio_read_timeout)
3907 /* convert to usec */
3908 adapter->ena_dev->mmio_read.reg_read_to =
3909 hints->mmio_read_timeout * 1000;
3911 if (hints->missed_tx_completion_count_threshold_to_reset)
3912 adapter->missing_tx_completion_threshold =
3913 hints->missed_tx_completion_count_threshold_to_reset;
3915 if (hints->missing_tx_completion_timeout) {
3916 if (hints->missing_tx_completion_timeout == ENA_HW_HINTS_NO_TIMEOUT)
3917 adapter->missing_tx_completion_to = ENA_HW_HINTS_NO_TIMEOUT;
3919 adapter->missing_tx_completion_to =
3920 msecs_to_jiffies(hints->missing_tx_completion_timeout);
3923 if (hints->netdev_wd_timeout)
3924 netdev->watchdog_timeo = msecs_to_jiffies(hints->netdev_wd_timeout);
3926 if (hints->driver_watchdog_timeout) {
3927 if (hints->driver_watchdog_timeout == ENA_HW_HINTS_NO_TIMEOUT)
3928 adapter->keep_alive_timeout = ENA_HW_HINTS_NO_TIMEOUT;
3930 adapter->keep_alive_timeout =
3931 msecs_to_jiffies(hints->driver_watchdog_timeout);
3935 static void ena_update_host_info(struct ena_admin_host_info *host_info,
3936 struct net_device *netdev)
3938 host_info->supported_network_features[0] =
3939 netdev->features & GENMASK_ULL(31, 0);
3940 host_info->supported_network_features[1] =
3941 (netdev->features & GENMASK_ULL(63, 32)) >> 32;
3944 static void ena_timer_service(struct timer_list *t)
3946 struct ena_adapter *adapter = from_timer(adapter, t, timer_service);
3947 u8 *debug_area = adapter->ena_dev->host_attr.debug_area_virt_addr;
3948 struct ena_admin_host_info *host_info =
3949 adapter->ena_dev->host_attr.host_info;
3951 check_for_missing_keep_alive(adapter);
3953 check_for_admin_com_state(adapter);
3955 check_for_missing_completions(adapter);
3957 check_for_empty_rx_ring(adapter);
3960 ena_dump_stats_to_buf(adapter, debug_area);
3963 ena_update_host_info(host_info, adapter->netdev);
3965 if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
3966 netif_err(adapter, drv, adapter->netdev,
3967 "Trigger reset is on\n");
3968 ena_dump_stats_to_dmesg(adapter);
3969 queue_work(ena_wq, &adapter->reset_task);
3973 /* Reset the timer */
3974 mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
3977 static u32 ena_calc_max_io_queue_num(struct pci_dev *pdev,
3978 struct ena_com_dev *ena_dev,
3979 struct ena_com_dev_get_features_ctx *get_feat_ctx)
3981 u32 io_tx_sq_num, io_tx_cq_num, io_rx_num, max_num_io_queues;
3983 if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
3984 struct ena_admin_queue_ext_feature_fields *max_queue_ext =
3985 &get_feat_ctx->max_queue_ext.max_queue_ext;
3986 io_rx_num = min_t(u32, max_queue_ext->max_rx_sq_num,
3987 max_queue_ext->max_rx_cq_num);
3989 io_tx_sq_num = max_queue_ext->max_tx_sq_num;
3990 io_tx_cq_num = max_queue_ext->max_tx_cq_num;
3992 struct ena_admin_queue_feature_desc *max_queues =
3993 &get_feat_ctx->max_queues;
3994 io_tx_sq_num = max_queues->max_sq_num;
3995 io_tx_cq_num = max_queues->max_cq_num;
3996 io_rx_num = min_t(u32, io_tx_sq_num, io_tx_cq_num);
3999 /* In case of LLQ use the llq fields for the tx SQ/CQ */
4000 if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
4001 io_tx_sq_num = get_feat_ctx->llq.max_llq_num;
4003 max_num_io_queues = min_t(u32, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES);
4004 max_num_io_queues = min_t(u32, max_num_io_queues, io_rx_num);
4005 max_num_io_queues = min_t(u32, max_num_io_queues, io_tx_sq_num);
4006 max_num_io_queues = min_t(u32, max_num_io_queues, io_tx_cq_num);
4007 /* 1 IRQ for mgmnt and 1 IRQs for each IO direction */
4008 max_num_io_queues = min_t(u32, max_num_io_queues, pci_msix_vec_count(pdev) - 1);
4010 return max_num_io_queues;
4013 static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx *feat,
4014 struct net_device *netdev)
4016 netdev_features_t dev_features = 0;
4018 /* Set offload features */
4019 if (feat->offload.tx &
4020 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK)
4021 dev_features |= NETIF_F_IP_CSUM;
4023 if (feat->offload.tx &
4024 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK)
4025 dev_features |= NETIF_F_IPV6_CSUM;
4027 if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK)
4028 dev_features |= NETIF_F_TSO;
4030 if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK)
4031 dev_features |= NETIF_F_TSO6;
4033 if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_MASK)
4034 dev_features |= NETIF_F_TSO_ECN;
4036 if (feat->offload.rx_supported &
4037 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK)
4038 dev_features |= NETIF_F_RXCSUM;
4040 if (feat->offload.rx_supported &
4041 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK)
4042 dev_features |= NETIF_F_RXCSUM;
4050 netdev->hw_features |= netdev->features;
4051 netdev->vlan_features |= netdev->features;
4054 static void ena_set_conf_feat_params(struct ena_adapter *adapter,
4055 struct ena_com_dev_get_features_ctx *feat)
4057 struct net_device *netdev = adapter->netdev;
4059 /* Copy mac address */
4060 if (!is_valid_ether_addr(feat->dev_attr.mac_addr)) {
4061 eth_hw_addr_random(netdev);
4062 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
4064 ether_addr_copy(adapter->mac_addr, feat->dev_attr.mac_addr);
4065 eth_hw_addr_set(netdev, adapter->mac_addr);
4068 /* Set offload features */
4069 ena_set_dev_offloads(feat, netdev);
4071 adapter->max_mtu = feat->dev_attr.max_mtu;
4072 netdev->max_mtu = adapter->max_mtu;
4073 netdev->min_mtu = ENA_MIN_MTU;
4076 static int ena_rss_init_default(struct ena_adapter *adapter)
4078 struct ena_com_dev *ena_dev = adapter->ena_dev;
4079 struct device *dev = &adapter->pdev->dev;
4083 rc = ena_com_rss_init(ena_dev, ENA_RX_RSS_TABLE_LOG_SIZE);
4085 dev_err(dev, "Cannot init indirect table\n");
4089 for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
4090 val = ethtool_rxfh_indir_default(i, adapter->num_io_queues);
4091 rc = ena_com_indirect_table_fill_entry(ena_dev, i,
4092 ENA_IO_RXQ_IDX(val));
4094 dev_err(dev, "Cannot fill indirect table\n");
4095 goto err_fill_indir;
4099 rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_TOEPLITZ, NULL,
4100 ENA_HASH_KEY_SIZE, 0xFFFFFFFF);
4101 if (unlikely(rc && (rc != -EOPNOTSUPP))) {
4102 dev_err(dev, "Cannot fill hash function\n");
4103 goto err_fill_indir;
4106 rc = ena_com_set_default_hash_ctrl(ena_dev);
4107 if (unlikely(rc && (rc != -EOPNOTSUPP))) {
4108 dev_err(dev, "Cannot fill hash control\n");
4109 goto err_fill_indir;
4115 ena_com_rss_destroy(ena_dev);
4121 static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
4123 int release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
4125 pci_release_selected_regions(pdev, release_bars);
4129 static void ena_calc_io_queue_size(struct ena_adapter *adapter,
4130 struct ena_com_dev_get_features_ctx *get_feat_ctx)
4132 struct ena_admin_feature_llq_desc *llq = &get_feat_ctx->llq;
4133 struct ena_com_dev *ena_dev = adapter->ena_dev;
4134 u32 tx_queue_size = ENA_DEFAULT_RING_SIZE;
4135 u32 rx_queue_size = ENA_DEFAULT_RING_SIZE;
4136 u32 max_tx_queue_size;
4137 u32 max_rx_queue_size;
4139 if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
4140 struct ena_admin_queue_ext_feature_fields *max_queue_ext =
4141 &get_feat_ctx->max_queue_ext.max_queue_ext;
4142 max_rx_queue_size = min_t(u32, max_queue_ext->max_rx_cq_depth,
4143 max_queue_ext->max_rx_sq_depth);
4144 max_tx_queue_size = max_queue_ext->max_tx_cq_depth;
4146 if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
4147 max_tx_queue_size = min_t(u32, max_tx_queue_size,
4148 llq->max_llq_depth);
4150 max_tx_queue_size = min_t(u32, max_tx_queue_size,
4151 max_queue_ext->max_tx_sq_depth);
4153 adapter->max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
4154 max_queue_ext->max_per_packet_tx_descs);
4155 adapter->max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
4156 max_queue_ext->max_per_packet_rx_descs);
4158 struct ena_admin_queue_feature_desc *max_queues =
4159 &get_feat_ctx->max_queues;
4160 max_rx_queue_size = min_t(u32, max_queues->max_cq_depth,
4161 max_queues->max_sq_depth);
4162 max_tx_queue_size = max_queues->max_cq_depth;
4164 if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
4165 max_tx_queue_size = min_t(u32, max_tx_queue_size,
4166 llq->max_llq_depth);
4168 max_tx_queue_size = min_t(u32, max_tx_queue_size,
4169 max_queues->max_sq_depth);
4171 adapter->max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
4172 max_queues->max_packet_tx_descs);
4173 adapter->max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
4174 max_queues->max_packet_rx_descs);
4177 max_tx_queue_size = rounddown_pow_of_two(max_tx_queue_size);
4178 max_rx_queue_size = rounddown_pow_of_two(max_rx_queue_size);
4180 tx_queue_size = clamp_val(tx_queue_size, ENA_MIN_RING_SIZE,
4182 rx_queue_size = clamp_val(rx_queue_size, ENA_MIN_RING_SIZE,
4185 tx_queue_size = rounddown_pow_of_two(tx_queue_size);
4186 rx_queue_size = rounddown_pow_of_two(rx_queue_size);
4188 adapter->max_tx_ring_size = max_tx_queue_size;
4189 adapter->max_rx_ring_size = max_rx_queue_size;
4190 adapter->requested_tx_ring_size = tx_queue_size;
4191 adapter->requested_rx_ring_size = rx_queue_size;
4194 /* ena_probe - Device Initialization Routine
4195 * @pdev: PCI device information struct
4196 * @ent: entry in ena_pci_tbl
4198 * Returns 0 on success, negative on failure
4200 * ena_probe initializes an adapter identified by a pci_dev structure.
4201 * The OS initialization, configuring of the adapter private structure,
4202 * and a hardware reset occur.
4204 static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4206 struct ena_com_dev_get_features_ctx get_feat_ctx;
4207 struct ena_com_dev *ena_dev = NULL;
4208 struct ena_adapter *adapter;
4209 struct net_device *netdev;
4210 static int adapters_found;
4211 u32 max_num_io_queues;
4215 dev_dbg(&pdev->dev, "%s\n", __func__);
4217 rc = pci_enable_device_mem(pdev);
4219 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
4223 rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(ENA_MAX_PHYS_ADDR_SIZE_BITS));
4225 dev_err(&pdev->dev, "dma_set_mask_and_coherent failed %d\n", rc);
4226 goto err_disable_device;
4229 pci_set_master(pdev);
4231 ena_dev = vzalloc(sizeof(*ena_dev));
4234 goto err_disable_device;
4237 bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
4238 rc = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
4240 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
4242 goto err_free_ena_dev;
4245 ena_dev->reg_bar = devm_ioremap(&pdev->dev,
4246 pci_resource_start(pdev, ENA_REG_BAR),
4247 pci_resource_len(pdev, ENA_REG_BAR));
4248 if (!ena_dev->reg_bar) {
4249 dev_err(&pdev->dev, "Failed to remap regs bar\n");
4251 goto err_free_region;
4254 ena_dev->ena_min_poll_delay_us = ENA_ADMIN_POLL_DELAY_US;
4256 ena_dev->dmadev = &pdev->dev;
4258 netdev = alloc_etherdev_mq(sizeof(struct ena_adapter), ENA_MAX_RINGS);
4260 dev_err(&pdev->dev, "alloc_etherdev_mq failed\n");
4262 goto err_free_region;
4265 SET_NETDEV_DEV(netdev, &pdev->dev);
4266 adapter = netdev_priv(netdev);
4267 adapter->ena_dev = ena_dev;
4268 adapter->netdev = netdev;
4269 adapter->pdev = pdev;
4270 adapter->msg_enable = DEFAULT_MSG_ENABLE;
4272 ena_dev->net_device = netdev;
4274 pci_set_drvdata(pdev, adapter);
4276 rc = ena_device_init(ena_dev, pdev, &get_feat_ctx, &wd_state);
4278 dev_err(&pdev->dev, "ENA device init failed\n");
4281 goto err_netdev_destroy;
4284 rc = ena_map_llq_mem_bar(pdev, ena_dev, bars);
4286 dev_err(&pdev->dev, "ENA llq bar mapping failed\n");
4287 goto err_device_destroy;
4290 /* Initial TX and RX interrupt delay. Assumes 1 usec granularity.
4291 * Updated during device initialization with the real granularity
4293 ena_dev->intr_moder_tx_interval = ENA_INTR_INITIAL_TX_INTERVAL_USECS;
4294 ena_dev->intr_moder_rx_interval = ENA_INTR_INITIAL_RX_INTERVAL_USECS;
4295 ena_dev->intr_delay_resolution = ENA_DEFAULT_INTR_DELAY_RESOLUTION;
4296 max_num_io_queues = ena_calc_max_io_queue_num(pdev, ena_dev, &get_feat_ctx);
4297 ena_calc_io_queue_size(adapter, &get_feat_ctx);
4298 if (unlikely(!max_num_io_queues)) {
4300 goto err_device_destroy;
4303 ena_set_conf_feat_params(adapter, &get_feat_ctx);
4305 adapter->reset_reason = ENA_REGS_RESET_NORMAL;
4307 adapter->num_io_queues = max_num_io_queues;
4308 adapter->max_num_io_queues = max_num_io_queues;
4309 adapter->last_monitored_tx_qid = 0;
4311 adapter->xdp_first_ring = 0;
4312 adapter->xdp_num_queues = 0;
4314 adapter->rx_copybreak = ENA_DEFAULT_RX_COPYBREAK;
4315 if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
4316 adapter->disable_meta_caching =
4317 !!(get_feat_ctx.llq.accel_mode.u.get.supported_flags &
4318 BIT(ENA_ADMIN_DISABLE_META_CACHING));
4320 adapter->wd_state = wd_state;
4322 snprintf(adapter->name, ENA_NAME_MAX_LEN, "ena_%d", adapters_found);
4324 rc = ena_com_init_interrupt_moderation(adapter->ena_dev);
4327 "Failed to query interrupt moderation feature\n");
4328 goto err_device_destroy;
4330 ena_init_io_rings(adapter,
4332 adapter->xdp_num_queues +
4333 adapter->num_io_queues);
4335 netdev->netdev_ops = &ena_netdev_ops;
4336 netdev->watchdog_timeo = TX_TIMEOUT;
4337 ena_set_ethtool_ops(netdev);
4339 netdev->priv_flags |= IFF_UNICAST_FLT;
4341 u64_stats_init(&adapter->syncp);
4343 rc = ena_enable_msix_and_set_admin_interrupts(adapter);
4346 "Failed to enable and set the admin interrupts\n");
4347 goto err_worker_destroy;
4349 rc = ena_rss_init_default(adapter);
4350 if (rc && (rc != -EOPNOTSUPP)) {
4351 dev_err(&pdev->dev, "Cannot init RSS rc: %d\n", rc);
4355 ena_config_debug_area(adapter);
4357 memcpy(adapter->netdev->perm_addr, adapter->mac_addr, netdev->addr_len);
4359 netif_carrier_off(netdev);
4361 rc = register_netdev(netdev);
4363 dev_err(&pdev->dev, "Cannot register net device\n");
4367 INIT_WORK(&adapter->reset_task, ena_fw_reset_device);
4369 adapter->last_keep_alive_jiffies = jiffies;
4370 adapter->keep_alive_timeout = ENA_DEVICE_KALIVE_TIMEOUT;
4371 adapter->missing_tx_completion_to = TX_TIMEOUT;
4372 adapter->missing_tx_completion_threshold = MAX_NUM_OF_TIMEOUTED_PACKETS;
4374 ena_update_hints(adapter, &get_feat_ctx.hw_hints);
4376 timer_setup(&adapter->timer_service, ena_timer_service, 0);
4377 mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
4379 dev_info(&pdev->dev,
4380 "%s found at mem %lx, mac addr %pM\n",
4381 DEVICE_NAME, (long)pci_resource_start(pdev, 0),
4384 set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
4391 ena_com_delete_debug_area(ena_dev);
4392 ena_com_rss_destroy(ena_dev);
4394 ena_com_dev_reset(ena_dev, ENA_REGS_RESET_INIT_ERR);
4395 /* stop submitting admin commands on a device that was reset */
4396 ena_com_set_admin_running_state(ena_dev, false);
4397 ena_free_mgmnt_irq(adapter);
4398 ena_disable_msix(adapter);
4400 del_timer(&adapter->timer_service);
4402 ena_com_delete_host_info(ena_dev);
4403 ena_com_admin_destroy(ena_dev);
4405 free_netdev(netdev);
4407 ena_release_bars(ena_dev, pdev);
4411 pci_disable_device(pdev);
4415 /*****************************************************************************/
4417 /* __ena_shutoff - Helper used in both PCI remove/shutdown routines
4418 * @pdev: PCI device information struct
4419 * @shutdown: Is it a shutdown operation? If false, means it is a removal
4421 * __ena_shutoff is a helper routine that does the real work on shutdown and
4422 * removal paths; the difference between those paths is with regards to whether
4423 * dettach or unregister the netdevice.
4425 static void __ena_shutoff(struct pci_dev *pdev, bool shutdown)
4427 struct ena_adapter *adapter = pci_get_drvdata(pdev);
4428 struct ena_com_dev *ena_dev;
4429 struct net_device *netdev;
4431 ena_dev = adapter->ena_dev;
4432 netdev = adapter->netdev;
4434 #ifdef CONFIG_RFS_ACCEL
4435 if ((adapter->msix_vecs >= 1) && (netdev->rx_cpu_rmap)) {
4436 free_irq_cpu_rmap(netdev->rx_cpu_rmap);
4437 netdev->rx_cpu_rmap = NULL;
4439 #endif /* CONFIG_RFS_ACCEL */
4441 /* Make sure timer and reset routine won't be called after
4442 * freeing device resources.
4444 del_timer_sync(&adapter->timer_service);
4445 cancel_work_sync(&adapter->reset_task);
4447 rtnl_lock(); /* lock released inside the below if-else block */
4448 adapter->reset_reason = ENA_REGS_RESET_SHUTDOWN;
4449 ena_destroy_device(adapter, true);
4451 netif_device_detach(netdev);
4456 unregister_netdev(netdev);
4457 free_netdev(netdev);
4460 ena_com_rss_destroy(ena_dev);
4462 ena_com_delete_debug_area(ena_dev);
4464 ena_com_delete_host_info(ena_dev);
4466 ena_release_bars(ena_dev, pdev);
4468 pci_disable_device(pdev);
4473 /* ena_remove - Device Removal Routine
4474 * @pdev: PCI device information struct
4476 * ena_remove is called by the PCI subsystem to alert the driver
4477 * that it should release a PCI device.
4480 static void ena_remove(struct pci_dev *pdev)
4482 __ena_shutoff(pdev, false);
4485 /* ena_shutdown - Device Shutdown Routine
4486 * @pdev: PCI device information struct
4488 * ena_shutdown is called by the PCI subsystem to alert the driver that
4489 * a shutdown/reboot (or kexec) is happening and device must be disabled.
4492 static void ena_shutdown(struct pci_dev *pdev)
4494 __ena_shutoff(pdev, true);
4497 /* ena_suspend - PM suspend callback
4498 * @dev_d: Device information struct
4500 static int __maybe_unused ena_suspend(struct device *dev_d)
4502 struct pci_dev *pdev = to_pci_dev(dev_d);
4503 struct ena_adapter *adapter = pci_get_drvdata(pdev);
4505 ena_increase_stat(&adapter->dev_stats.suspend, 1, &adapter->syncp);
4508 if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
4510 "Ignoring device reset request as the device is being suspended\n");
4511 clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
4513 ena_destroy_device(adapter, true);
4518 /* ena_resume - PM resume callback
4519 * @dev_d: Device information struct
4521 static int __maybe_unused ena_resume(struct device *dev_d)
4523 struct ena_adapter *adapter = dev_get_drvdata(dev_d);
4526 ena_increase_stat(&adapter->dev_stats.resume, 1, &adapter->syncp);
4529 rc = ena_restore_device(adapter);
4534 static SIMPLE_DEV_PM_OPS(ena_pm_ops, ena_suspend, ena_resume);
4536 static struct pci_driver ena_pci_driver = {
4537 .name = DRV_MODULE_NAME,
4538 .id_table = ena_pci_tbl,
4540 .remove = ena_remove,
4541 .shutdown = ena_shutdown,
4542 .driver.pm = &ena_pm_ops,
4543 .sriov_configure = pci_sriov_configure_simple,
4546 static int __init ena_init(void)
4548 ena_wq = create_singlethread_workqueue(DRV_MODULE_NAME);
4550 pr_err("Failed to create workqueue\n");
4554 return pci_register_driver(&ena_pci_driver);
4557 static void __exit ena_cleanup(void)
4559 pci_unregister_driver(&ena_pci_driver);
4562 destroy_workqueue(ena_wq);
4567 /******************************************************************************
4568 ******************************** AENQ Handlers *******************************
4569 *****************************************************************************/
4570 /* ena_update_on_link_change:
4571 * Notify the network interface about the change in link status
4573 static void ena_update_on_link_change(void *adapter_data,
4574 struct ena_admin_aenq_entry *aenq_e)
4576 struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
4577 struct ena_admin_aenq_link_change_desc *aenq_desc =
4578 (struct ena_admin_aenq_link_change_desc *)aenq_e;
4579 int status = aenq_desc->flags &
4580 ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK;
4583 netif_dbg(adapter, ifup, adapter->netdev, "%s\n", __func__);
4584 set_bit(ENA_FLAG_LINK_UP, &adapter->flags);
4585 if (!test_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags))
4586 netif_carrier_on(adapter->netdev);
4588 clear_bit(ENA_FLAG_LINK_UP, &adapter->flags);
4589 netif_carrier_off(adapter->netdev);
4593 static void ena_keep_alive_wd(void *adapter_data,
4594 struct ena_admin_aenq_entry *aenq_e)
4596 struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
4597 struct ena_admin_aenq_keep_alive_desc *desc;
4601 desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e;
4602 adapter->last_keep_alive_jiffies = jiffies;
4604 rx_drops = ((u64)desc->rx_drops_high << 32) | desc->rx_drops_low;
4605 tx_drops = ((u64)desc->tx_drops_high << 32) | desc->tx_drops_low;
4607 u64_stats_update_begin(&adapter->syncp);
4608 /* These stats are accumulated by the device, so the counters indicate
4609 * all drops since last reset.
4611 adapter->dev_stats.rx_drops = rx_drops;
4612 adapter->dev_stats.tx_drops = tx_drops;
4613 u64_stats_update_end(&adapter->syncp);
4616 static void ena_notification(void *adapter_data,
4617 struct ena_admin_aenq_entry *aenq_e)
4619 struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
4620 struct ena_admin_ena_hw_hints *hints;
4622 WARN(aenq_e->aenq_common_desc.group != ENA_ADMIN_NOTIFICATION,
4623 "Invalid group(%x) expected %x\n",
4624 aenq_e->aenq_common_desc.group,
4625 ENA_ADMIN_NOTIFICATION);
4627 switch (aenq_e->aenq_common_desc.syndrome) {
4628 case ENA_ADMIN_UPDATE_HINTS:
4629 hints = (struct ena_admin_ena_hw_hints *)
4630 (&aenq_e->inline_data_w4);
4631 ena_update_hints(adapter, hints);
4634 netif_err(adapter, drv, adapter->netdev,
4635 "Invalid aenq notification link state %d\n",
4636 aenq_e->aenq_common_desc.syndrome);
4640 /* This handler will called for unknown event group or unimplemented handlers*/
4641 static void unimplemented_aenq_handler(void *data,
4642 struct ena_admin_aenq_entry *aenq_e)
4644 struct ena_adapter *adapter = (struct ena_adapter *)data;
4646 netif_err(adapter, drv, adapter->netdev,
4647 "Unknown event was received or event with unimplemented handler\n");
4650 static struct ena_aenq_handlers aenq_handlers = {
4652 [ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
4653 [ENA_ADMIN_NOTIFICATION] = ena_notification,
4654 [ENA_ADMIN_KEEP_ALIVE] = ena_keep_alive_wd,
4656 .unimplemented_handler = unimplemented_aenq_handler
4659 module_init(ena_init);
4660 module_exit(ena_cleanup);