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freebsd-skq/sys/dev/ena/ena.c
Michal Krawczyk 1c808fcd85 Allocate BAR for ENA MSIx vector table 
In the new ENA-based instances like c6gn, the vector table moved to a
new PCIe bar - BAR1. Previously it was always located on the BAR0, so
the resources were already allocated together with the registers.

As the FreeBSD isn't doing any resource allocation behind the scenes,
the driver is responsible to allocate them explicitly, before other
parts of the OS (like the PCI code allocating MSIx) will be able to
access them.

To determine dynamically BAR on which the MSIx vector table is present
the pci_msix_table_bar() is being used and the new BAR is allocated if
needed.

Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc
MFC after: 3 days
2021-02-18 13:54:36 +01:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2015-2020 Amazon.com, Inc. or its affiliates.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_rss.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <sys/time.h>
#include <sys/eventhandler.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/in_cksum.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#ifdef RSS
#include <net/rss_config.h>
#endif
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include "ena_datapath.h"
#include "ena.h"
#include "ena_sysctl.h"
#ifdef DEV_NETMAP
#include "ena_netmap.h"
#endif /* DEV_NETMAP */
/*********************************************************
* Function prototypes
*********************************************************/
static int ena_probe(device_t);
static void ena_intr_msix_mgmnt(void *);
static void ena_free_pci_resources(struct ena_adapter *);
static int ena_change_mtu(if_t, int);
static inline void ena_alloc_counters(counter_u64_t *, int);
static inline void ena_free_counters(counter_u64_t *, int);
static inline void ena_reset_counters(counter_u64_t *, int);
static void ena_init_io_rings_common(struct ena_adapter *,
struct ena_ring *, uint16_t);
static void ena_init_io_rings_basic(struct ena_adapter *);
static void ena_init_io_rings_advanced(struct ena_adapter *);
static void ena_init_io_rings(struct ena_adapter *);
static void ena_free_io_ring_resources(struct ena_adapter *, unsigned int);
static void ena_free_all_io_rings_resources(struct ena_adapter *);
static int ena_setup_tx_dma_tag(struct ena_adapter *);
static int ena_free_tx_dma_tag(struct ena_adapter *);
static int ena_setup_rx_dma_tag(struct ena_adapter *);
static int ena_free_rx_dma_tag(struct ena_adapter *);
static void ena_release_all_tx_dmamap(struct ena_ring *);
static int ena_setup_tx_resources(struct ena_adapter *, int);
static void ena_free_tx_resources(struct ena_adapter *, int);
static int ena_setup_all_tx_resources(struct ena_adapter *);
static void ena_free_all_tx_resources(struct ena_adapter *);
static int ena_setup_rx_resources(struct ena_adapter *, unsigned int);
static void ena_free_rx_resources(struct ena_adapter *, unsigned int);
static int ena_setup_all_rx_resources(struct ena_adapter *);
static void ena_free_all_rx_resources(struct ena_adapter *);
static inline int ena_alloc_rx_mbuf(struct ena_adapter *, struct ena_ring *,
struct ena_rx_buffer *);
static void ena_free_rx_mbuf(struct ena_adapter *, struct ena_ring *,
struct ena_rx_buffer *);
static void ena_free_rx_bufs(struct ena_adapter *, unsigned int);
static void ena_refill_all_rx_bufs(struct ena_adapter *);
static void ena_free_all_rx_bufs(struct ena_adapter *);
static void ena_free_tx_bufs(struct ena_adapter *, unsigned int);
static void ena_free_all_tx_bufs(struct ena_adapter *);
static void ena_destroy_all_tx_queues(struct ena_adapter *);
static void ena_destroy_all_rx_queues(struct ena_adapter *);
static void ena_destroy_all_io_queues(struct ena_adapter *);
static int ena_create_io_queues(struct ena_adapter *);
static int ena_handle_msix(void *);
static int ena_enable_msix(struct ena_adapter *);
static void ena_setup_mgmnt_intr(struct ena_adapter *);
static int ena_setup_io_intr(struct ena_adapter *);
static int ena_request_mgmnt_irq(struct ena_adapter *);
static int ena_request_io_irq(struct ena_adapter *);
static void ena_free_mgmnt_irq(struct ena_adapter *);
static void ena_free_io_irq(struct ena_adapter *);
static void ena_free_irqs(struct ena_adapter*);
static void ena_disable_msix(struct ena_adapter *);
static void ena_unmask_all_io_irqs(struct ena_adapter *);
static int ena_rss_configure(struct ena_adapter *);
static int ena_up_complete(struct ena_adapter *);
static uint64_t ena_get_counter(if_t, ift_counter);
static int ena_media_change(if_t);
static void ena_media_status(if_t, struct ifmediareq *);
static void ena_init(void *);
static int ena_ioctl(if_t, u_long, caddr_t);
static int ena_get_dev_offloads(struct ena_com_dev_get_features_ctx *);
static void ena_update_host_info(struct ena_admin_host_info *, if_t);
static void ena_update_hwassist(struct ena_adapter *);
static int ena_setup_ifnet(device_t, struct ena_adapter *,
struct ena_com_dev_get_features_ctx *);
static int ena_enable_wc(struct resource *);
static int ena_set_queues_placement_policy(device_t, struct ena_com_dev *,
struct ena_admin_feature_llq_desc *, struct ena_llq_configurations *);
static uint32_t ena_calc_max_io_queue_num(device_t, struct ena_com_dev *,
struct ena_com_dev_get_features_ctx *);
static int ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *);
static int ena_rss_init_default(struct ena_adapter *);
static void ena_rss_init_default_deferred(void *);
static void ena_config_host_info(struct ena_com_dev *, device_t);
static int ena_attach(device_t);
static int ena_detach(device_t);
static int ena_device_init(struct ena_adapter *, device_t,
struct ena_com_dev_get_features_ctx *, int *);
static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *);
static void ena_update_on_link_change(void *, struct ena_admin_aenq_entry *);
static void unimplemented_aenq_handler(void *,
struct ena_admin_aenq_entry *);
static int ena_copy_eni_metrics(struct ena_adapter *);
static void ena_timer_service(void *);
static char ena_version[] = DEVICE_NAME DRV_MODULE_NAME " v" DRV_MODULE_VERSION;
static ena_vendor_info_t ena_vendor_info_array[] = {
{ PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_PF, 0},
{ PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_PF_RSERV0, 0},
{ PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_VF, 0},
{ PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_VF_RSERV0, 0},
/* Last entry */
{ 0, 0, 0 }
};
/*
* Contains pointers to event handlers, e.g. link state chage.
*/
static struct ena_aenq_handlers aenq_handlers;
void
ena_dmamap_callback(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
if (error != 0)
return;
*(bus_addr_t *) arg = segs[0].ds_addr;
}
int
ena_dma_alloc(device_t dmadev, bus_size_t size,
ena_mem_handle_t *dma, int mapflags, bus_size_t alignment)
{
struct ena_adapter* adapter = device_get_softc(dmadev);
uint32_t maxsize;
uint64_t dma_space_addr;
int error;
maxsize = ((size - 1) / PAGE_SIZE + 1) * PAGE_SIZE;
dma_space_addr = ENA_DMA_BIT_MASK(adapter->dma_width);
if (unlikely(dma_space_addr == 0))
dma_space_addr = BUS_SPACE_MAXADDR;
error = bus_dma_tag_create(bus_get_dma_tag(dmadev), /* parent */
alignment, 0, /* alignment, bounds */
dma_space_addr, /* lowaddr of exclusion window */
BUS_SPACE_MAXADDR,/* highaddr of exclusion window */
NULL, NULL, /* filter, filterarg */
maxsize, /* maxsize */
1, /* nsegments */
maxsize, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&dma->tag);
if (unlikely(error != 0)) {
ena_trace(NULL, ENA_ALERT, "bus_dma_tag_create failed: %d\n", error);
goto fail_tag;
}
error = bus_dmamem_alloc(dma->tag, (void**) &dma->vaddr,
BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->map);
if (unlikely(error != 0)) {
ena_trace(NULL, ENA_ALERT, "bus_dmamem_alloc(%ju) failed: %d\n",
(uintmax_t)size, error);
goto fail_map_create;
}
dma->paddr = 0;
error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr,
size, ena_dmamap_callback, &dma->paddr, mapflags);
if (unlikely((error != 0) || (dma->paddr == 0))) {
ena_trace(NULL, ENA_ALERT, ": bus_dmamap_load failed: %d\n", error);
goto fail_map_load;
}
bus_dmamap_sync(dma->tag, dma->map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
return (0);
fail_map_load:
bus_dmamem_free(dma->tag, dma->vaddr, dma->map);
fail_map_create:
bus_dma_tag_destroy(dma->tag);
fail_tag:
dma->tag = NULL;
dma->vaddr = NULL;
dma->paddr = 0;
return (error);
}
/*
* This function should generate unique key for the whole driver.
* If the key was already genereated in the previous call (for example
* for another adapter), then it should be returned instead.
*/
void
ena_rss_key_fill(void *key, size_t size)
{
static bool key_generated;
static uint8_t default_key[ENA_HASH_KEY_SIZE];
KASSERT(size <= ENA_HASH_KEY_SIZE, ("Requested more bytes than ENA RSS key can hold"));
if (!key_generated) {
arc4random_buf(default_key, ENA_HASH_KEY_SIZE);
key_generated = true;
}
memcpy(key, default_key, size);
}
static void
ena_free_pci_resources(struct ena_adapter *adapter)
{
device_t pdev = adapter->pdev;
if (adapter->memory != NULL) {
bus_release_resource(pdev, SYS_RES_MEMORY,
PCIR_BAR(ENA_MEM_BAR), adapter->memory);
}
if (adapter->registers != NULL) {
bus_release_resource(pdev, SYS_RES_MEMORY,
PCIR_BAR(ENA_REG_BAR), adapter->registers);
}
if (adapter->msix != NULL) {
bus_release_resource(pdev, SYS_RES_MEMORY,
adapter->msix_rid, adapter->msix);
}
}
static int
ena_probe(device_t dev)
{
ena_vendor_info_t *ent;
char adapter_name[60];
uint16_t pci_vendor_id = 0;
uint16_t pci_device_id = 0;
pci_vendor_id = pci_get_vendor(dev);
pci_device_id = pci_get_device(dev);
ent = ena_vendor_info_array;
while (ent->vendor_id != 0) {
if ((pci_vendor_id == ent->vendor_id) &&
(pci_device_id == ent->device_id)) {
ena_trace(NULL, ENA_DBG, "vendor=%x device=%x\n",
pci_vendor_id, pci_device_id);
sprintf(adapter_name, DEVICE_DESC);
device_set_desc_copy(dev, adapter_name);
return (BUS_PROBE_DEFAULT);
}
ent++;
}
return (ENXIO);
}
static int
ena_change_mtu(if_t ifp, int new_mtu)
{
struct ena_adapter *adapter = if_getsoftc(ifp);
int rc;
if ((new_mtu > adapter->max_mtu) || (new_mtu < ENA_MIN_MTU)) {
device_printf(adapter->pdev, "Invalid MTU setting. "
"new_mtu: %d max mtu: %d min mtu: %d\n",
new_mtu, adapter->max_mtu, ENA_MIN_MTU);
return (EINVAL);
}
rc = ena_com_set_dev_mtu(adapter->ena_dev, new_mtu);
if (likely(rc == 0)) {
ena_trace(NULL, ENA_DBG, "set MTU to %d\n", new_mtu);
if_setmtu(ifp, new_mtu);
} else {
device_printf(adapter->pdev, "Failed to set MTU to %d\n",
new_mtu);
}
return (rc);
}
static inline void
ena_alloc_counters(counter_u64_t *begin, int size)
{
counter_u64_t *end = (counter_u64_t *)((char *)begin + size);
for (; begin < end; ++begin)
*begin = counter_u64_alloc(M_WAITOK);
}
static inline void
ena_free_counters(counter_u64_t *begin, int size)
{
counter_u64_t *end = (counter_u64_t *)((char *)begin + size);
for (; begin < end; ++begin)
counter_u64_free(*begin);
}
static inline void
ena_reset_counters(counter_u64_t *begin, int size)
{
counter_u64_t *end = (counter_u64_t *)((char *)begin + size);
for (; begin < end; ++begin)
counter_u64_zero(*begin);
}
static void
ena_init_io_rings_common(struct ena_adapter *adapter, struct ena_ring *ring,
uint16_t qid)
{
ring->qid = qid;
ring->adapter = adapter;
ring->ena_dev = adapter->ena_dev;
ring->first_interrupt = false;
ring->no_interrupt_event_cnt = 0;
}
static void
ena_init_io_rings_basic(struct ena_adapter *adapter)
{
struct ena_com_dev *ena_dev;
struct ena_ring *txr, *rxr;
struct ena_que *que;
int i;
ena_dev = adapter->ena_dev;
for (i = 0; i < adapter->num_io_queues; i++) {
txr = &adapter->tx_ring[i];
rxr = &adapter->rx_ring[i];
/* TX/RX common ring state */
ena_init_io_rings_common(adapter, txr, i);
ena_init_io_rings_common(adapter, rxr, i);
/* TX specific ring state */
txr->tx_max_header_size = ena_dev->tx_max_header_size;
txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
que = &adapter->que[i];
que->adapter = adapter;
que->id = i;
que->tx_ring = txr;
que->rx_ring = rxr;
txr->que = que;
rxr->que = que;
rxr->empty_rx_queue = 0;
rxr->rx_mbuf_sz = ena_mbuf_sz;
}
}
static void
ena_init_io_rings_advanced(struct ena_adapter *adapter)
{
struct ena_ring *txr, *rxr;
int i;
for (i = 0; i < adapter->num_io_queues; i++) {
txr = &adapter->tx_ring[i];
rxr = &adapter->rx_ring[i];
/* Allocate a buf ring */
txr->buf_ring_size = adapter->buf_ring_size;
txr->br = buf_ring_alloc(txr->buf_ring_size, M_DEVBUF,
M_WAITOK, &txr->ring_mtx);
/* Allocate Tx statistics. */
ena_alloc_counters((counter_u64_t *)&txr->tx_stats,
sizeof(txr->tx_stats));
/* Allocate Rx statistics. */
ena_alloc_counters((counter_u64_t *)&rxr->rx_stats,
sizeof(rxr->rx_stats));
/* Initialize locks */
snprintf(txr->mtx_name, nitems(txr->mtx_name), "%s:tx(%d)",
device_get_nameunit(adapter->pdev), i);
snprintf(rxr->mtx_name, nitems(rxr->mtx_name), "%s:rx(%d)",
device_get_nameunit(adapter->pdev), i);
mtx_init(&txr->ring_mtx, txr->mtx_name, NULL, MTX_DEF);
}
}
static void
ena_init_io_rings(struct ena_adapter *adapter)
{
/*
* IO rings initialization can be divided into the 2 steps:
* 1. Initialize variables and fields with initial values and copy
* them from adapter/ena_dev (basic)
* 2. Allocate mutex, counters and buf_ring (advanced)
*/
ena_init_io_rings_basic(adapter);
ena_init_io_rings_advanced(adapter);
}
static void
ena_free_io_ring_resources(struct ena_adapter *adapter, unsigned int qid)
{
struct ena_ring *txr = &adapter->tx_ring[qid];
struct ena_ring *rxr = &adapter->rx_ring[qid];
ena_free_counters((counter_u64_t *)&txr->tx_stats,
sizeof(txr->tx_stats));
ena_free_counters((counter_u64_t *)&rxr->rx_stats,
sizeof(rxr->rx_stats));
ENA_RING_MTX_LOCK(txr);
drbr_free(txr->br, M_DEVBUF);
ENA_RING_MTX_UNLOCK(txr);
mtx_destroy(&txr->ring_mtx);
}
static void
ena_free_all_io_rings_resources(struct ena_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_io_queues; i++)
ena_free_io_ring_resources(adapter, i);
}
static int
ena_setup_tx_dma_tag(struct ena_adapter *adapter)
{
int ret;
/* Create DMA tag for Tx buffers */
ret = bus_dma_tag_create(bus_get_dma_tag(adapter->pdev),
1, 0, /* alignment, bounds */
ENA_DMA_BIT_MASK(adapter->dma_width), /* lowaddr of excl window */
BUS_SPACE_MAXADDR, /* highaddr of excl window */
NULL, NULL, /* filter, filterarg */
ENA_TSO_MAXSIZE, /* maxsize */
adapter->max_tx_sgl_size - 1, /* nsegments */
ENA_TSO_MAXSIZE, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&adapter->tx_buf_tag);
return (ret);
}
static int
ena_free_tx_dma_tag(struct ena_adapter *adapter)
{
int ret;
ret = bus_dma_tag_destroy(adapter->tx_buf_tag);
if (likely(ret == 0))
adapter->tx_buf_tag = NULL;
return (ret);
}
static int
ena_setup_rx_dma_tag(struct ena_adapter *adapter)
{
int ret;
/* Create DMA tag for Rx buffers*/
ret = bus_dma_tag_create(bus_get_dma_tag(adapter->pdev), /* parent */
1, 0, /* alignment, bounds */
ENA_DMA_BIT_MASK(adapter->dma_width), /* lowaddr of excl window */
BUS_SPACE_MAXADDR, /* highaddr of excl window */
NULL, NULL, /* filter, filterarg */
ena_mbuf_sz, /* maxsize */
adapter->max_rx_sgl_size, /* nsegments */
ena_mbuf_sz, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&adapter->rx_buf_tag);
return (ret);
}
static int
ena_free_rx_dma_tag(struct ena_adapter *adapter)
{
int ret;
ret = bus_dma_tag_destroy(adapter->rx_buf_tag);
if (likely(ret == 0))
adapter->rx_buf_tag = NULL;
return (ret);
}
static void
ena_release_all_tx_dmamap(struct ena_ring *tx_ring)
{
struct ena_adapter *adapter = tx_ring->adapter;
struct ena_tx_buffer *tx_info;
bus_dma_tag_t tx_tag = adapter->tx_buf_tag;;
int i;
#ifdef DEV_NETMAP
struct ena_netmap_tx_info *nm_info;
int j;
#endif /* DEV_NETMAP */
for (i = 0; i < tx_ring->ring_size; ++i) {
tx_info = &tx_ring->tx_buffer_info[i];
#ifdef DEV_NETMAP
if (adapter->ifp->if_capenable & IFCAP_NETMAP) {
nm_info = &tx_info->nm_info;
for (j = 0; j < ENA_PKT_MAX_BUFS; ++j) {
if (nm_info->map_seg[j] != NULL) {
bus_dmamap_destroy(tx_tag,
nm_info->map_seg[j]);
nm_info->map_seg[j] = NULL;
}
}
}
#endif /* DEV_NETMAP */
if (tx_info->dmamap != NULL) {
bus_dmamap_destroy(tx_tag, tx_info->dmamap);
tx_info->dmamap = NULL;
}
}
}
/**
* ena_setup_tx_resources - allocate Tx resources (Descriptors)
* @adapter: network interface device structure
* @qid: queue index
*
* Returns 0 on success, otherwise on failure.
**/
static int
ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
{
struct ena_que *que = &adapter->que[qid];
struct ena_ring *tx_ring = que->tx_ring;
int size, i, err;
#ifdef DEV_NETMAP
bus_dmamap_t *map;
int j;
ena_netmap_reset_tx_ring(adapter, qid);
#endif /* DEV_NETMAP */
size = sizeof(struct ena_tx_buffer) * tx_ring->ring_size;
tx_ring->tx_buffer_info = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
if (unlikely(tx_ring->tx_buffer_info == NULL))
return (ENOMEM);
size = sizeof(uint16_t) * tx_ring->ring_size;
tx_ring->free_tx_ids = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
if (unlikely(tx_ring->free_tx_ids == NULL))
goto err_buf_info_free;
size = tx_ring->tx_max_header_size;
tx_ring->push_buf_intermediate_buf = malloc(size, M_DEVBUF,
M_NOWAIT | M_ZERO);
if (unlikely(tx_ring->push_buf_intermediate_buf == NULL))
goto err_tx_ids_free;
/* Req id stack for TX OOO completions */
for (i = 0; i < tx_ring->ring_size; i++)
tx_ring->free_tx_ids[i] = i;
/* Reset TX statistics. */
ena_reset_counters((counter_u64_t *)&tx_ring->tx_stats,
sizeof(tx_ring->tx_stats));
tx_ring->next_to_use = 0;
tx_ring->next_to_clean = 0;
tx_ring->acum_pkts = 0;
/* Make sure that drbr is empty */
ENA_RING_MTX_LOCK(tx_ring);
drbr_flush(adapter->ifp, tx_ring->br);
ENA_RING_MTX_UNLOCK(tx_ring);
/* ... and create the buffer DMA maps */
for (i = 0; i < tx_ring->ring_size; i++) {
err = bus_dmamap_create(adapter->tx_buf_tag, 0,
&tx_ring->tx_buffer_info[i].dmamap);
if (unlikely(err != 0)) {
ena_trace(NULL, ENA_ALERT,
"Unable to create Tx DMA map for buffer %d\n",
i);
goto err_map_release;
}
#ifdef DEV_NETMAP
if (adapter->ifp->if_capenable & IFCAP_NETMAP) {
map = tx_ring->tx_buffer_info[i].nm_info.map_seg;
for (j = 0; j < ENA_PKT_MAX_BUFS; j++) {
err = bus_dmamap_create(adapter->tx_buf_tag, 0,
&map[j]);
if (unlikely(err != 0)) {
ena_trace(NULL, ENA_ALERT, "Unable to create "
"Tx DMA for buffer %d %d\n", i, j);
goto err_map_release;
}
}
}
#endif /* DEV_NETMAP */
}
/* Allocate taskqueues */
TASK_INIT(&tx_ring->enqueue_task, 0, ena_deferred_mq_start, tx_ring);
tx_ring->enqueue_tq = taskqueue_create_fast("ena_tx_enque", M_NOWAIT,
taskqueue_thread_enqueue, &tx_ring->enqueue_tq);
if (unlikely(tx_ring->enqueue_tq == NULL)) {
ena_trace(NULL, ENA_ALERT,
"Unable to create taskqueue for enqueue task\n");
i = tx_ring->ring_size;
goto err_map_release;
}
tx_ring->running = true;
taskqueue_start_threads(&tx_ring->enqueue_tq, 1, PI_NET,
"%s txeq %d", device_get_nameunit(adapter->pdev), que->cpu);
return (0);
err_map_release:
ena_release_all_tx_dmamap(tx_ring);
err_tx_ids_free:
free(tx_ring->free_tx_ids, M_DEVBUF);
tx_ring->free_tx_ids = NULL;
err_buf_info_free:
free(tx_ring->tx_buffer_info, M_DEVBUF);
tx_ring->tx_buffer_info = NULL;
return (ENOMEM);
}
/**
* ena_free_tx_resources - Free Tx Resources per Queue
* @adapter: network interface device structure
* @qid: queue index
*
* Free all transmit software resources
**/
static void
ena_free_tx_resources(struct ena_adapter *adapter, int qid)
{
struct ena_ring *tx_ring = &adapter->tx_ring[qid];
#ifdef DEV_NETMAP
struct ena_netmap_tx_info *nm_info;
int j;
#endif /* DEV_NETMAP */
while (taskqueue_cancel(tx_ring->enqueue_tq, &tx_ring->enqueue_task,
NULL))
taskqueue_drain(tx_ring->enqueue_tq, &tx_ring->enqueue_task);
taskqueue_free(tx_ring->enqueue_tq);
ENA_RING_MTX_LOCK(tx_ring);
/* Flush buffer ring, */
drbr_flush(adapter->ifp, tx_ring->br);
/* Free buffer DMA maps, */
for (int i = 0; i < tx_ring->ring_size; i++) {
bus_dmamap_sync(adapter->tx_buf_tag,
tx_ring->tx_buffer_info[i].dmamap, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(adapter->tx_buf_tag,
tx_ring->tx_buffer_info[i].dmamap);
bus_dmamap_destroy(adapter->tx_buf_tag,
tx_ring->tx_buffer_info[i].dmamap);
#ifdef DEV_NETMAP
if (adapter->ifp->if_capenable & IFCAP_NETMAP) {
nm_info = &tx_ring->tx_buffer_info[i].nm_info;
for (j = 0; j < ENA_PKT_MAX_BUFS; j++) {
if (nm_info->socket_buf_idx[j] != 0) {
bus_dmamap_sync(adapter->tx_buf_tag,
nm_info->map_seg[j],
BUS_DMASYNC_POSTWRITE);
ena_netmap_unload(adapter,
nm_info->map_seg[j]);
}
bus_dmamap_destroy(adapter->tx_buf_tag,
nm_info->map_seg[j]);
nm_info->socket_buf_idx[j] = 0;
}
}
#endif /* DEV_NETMAP */
m_freem(tx_ring->tx_buffer_info[i].mbuf);
tx_ring->tx_buffer_info[i].mbuf = NULL;
}
ENA_RING_MTX_UNLOCK(tx_ring);
/* And free allocated memory. */
free(tx_ring->tx_buffer_info, M_DEVBUF);
tx_ring->tx_buffer_info = NULL;
free(tx_ring->free_tx_ids, M_DEVBUF);
tx_ring->free_tx_ids = NULL;
free(tx_ring->push_buf_intermediate_buf, M_DEVBUF);
tx_ring->push_buf_intermediate_buf = NULL;
}
/**
* ena_setup_all_tx_resources - allocate all queues Tx resources
* @adapter: network interface device structure
*
* Returns 0 on success, otherwise on failure.
**/
static int
ena_setup_all_tx_resources(struct ena_adapter *adapter)
{
int i, rc;
for (i = 0; i < adapter->num_io_queues; i++) {
rc = ena_setup_tx_resources(adapter, i);
if (rc != 0) {
device_printf(adapter->pdev,
"Allocation for Tx Queue %u failed\n", i);
goto err_setup_tx;
}
}
return (0);
err_setup_tx:
/* Rewind the index freeing the rings as we go */
while (i--)
ena_free_tx_resources(adapter, i);
return (rc);
}
/**
* ena_free_all_tx_resources - Free Tx Resources for All Queues
* @adapter: network interface device structure
*
* Free all transmit software resources
**/
static void
ena_free_all_tx_resources(struct ena_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_io_queues; i++)
ena_free_tx_resources(adapter, i);
}
/**
* ena_setup_rx_resources - allocate Rx resources (Descriptors)
* @adapter: network interface device structure
* @qid: queue index
*
* Returns 0 on success, otherwise on failure.
**/
static int
ena_setup_rx_resources(struct ena_adapter *adapter, unsigned int qid)
{
struct ena_que *que = &adapter->que[qid];
struct ena_ring *rx_ring = que->rx_ring;
int size, err, i;
size = sizeof(struct ena_rx_buffer) * rx_ring->ring_size;
#ifdef DEV_NETMAP
ena_netmap_reset_rx_ring(adapter, qid);
rx_ring->initialized = false;
#endif /* DEV_NETMAP */
/*
* Alloc extra element so in rx path
* we can always prefetch rx_info + 1
*/
size += sizeof(struct ena_rx_buffer);
rx_ring->rx_buffer_info = malloc(size, M_DEVBUF, M_WAITOK | M_ZERO);
size = sizeof(uint16_t) * rx_ring->ring_size;
rx_ring->free_rx_ids = malloc(size, M_DEVBUF, M_WAITOK);
for (i = 0; i < rx_ring->ring_size; i++)
rx_ring->free_rx_ids[i] = i;
/* Reset RX statistics. */
ena_reset_counters((counter_u64_t *)&rx_ring->rx_stats,
sizeof(rx_ring->rx_stats));
rx_ring->next_to_clean = 0;
rx_ring->next_to_use = 0;
/* ... and create the buffer DMA maps */
for (i = 0; i < rx_ring->ring_size; i++) {
err = bus_dmamap_create(adapter->rx_buf_tag, 0,
&(rx_ring->rx_buffer_info[i].map));
if (err != 0) {
ena_trace(NULL, ENA_ALERT,
"Unable to create Rx DMA map for buffer %d\n", i);
goto err_buf_info_unmap;
}
}
/* Create LRO for the ring */
if ((adapter->ifp->if_capenable & IFCAP_LRO) != 0) {
int err = tcp_lro_init(&rx_ring->lro);
if (err != 0) {
device_printf(adapter->pdev,
"LRO[%d] Initialization failed!\n", qid);
} else {
ena_trace(NULL, ENA_INFO,
"RX Soft LRO[%d] Initialized\n", qid);
rx_ring->lro.ifp = adapter->ifp;
}
}
return (0);
err_buf_info_unmap:
while (i--) {
bus_dmamap_destroy(adapter->rx_buf_tag,
rx_ring->rx_buffer_info[i].map);
}
free(rx_ring->free_rx_ids, M_DEVBUF);
rx_ring->free_rx_ids = NULL;
free(rx_ring->rx_buffer_info, M_DEVBUF);
rx_ring->rx_buffer_info = NULL;
return (ENOMEM);
}
/**
* ena_free_rx_resources - Free Rx Resources
* @adapter: network interface device structure
* @qid: queue index
*
* Free all receive software resources
**/
static void
ena_free_rx_resources(struct ena_adapter *adapter, unsigned int qid)
{
struct ena_ring *rx_ring = &adapter->rx_ring[qid];
/* Free buffer DMA maps, */
for (int i = 0; i < rx_ring->ring_size; i++) {
bus_dmamap_sync(adapter->rx_buf_tag,
rx_ring->rx_buffer_info[i].map, BUS_DMASYNC_POSTREAD);
m_freem(rx_ring->rx_buffer_info[i].mbuf);
rx_ring->rx_buffer_info[i].mbuf = NULL;
bus_dmamap_unload(adapter->rx_buf_tag,
rx_ring->rx_buffer_info[i].map);
bus_dmamap_destroy(adapter->rx_buf_tag,
rx_ring->rx_buffer_info[i].map);
}
/* free LRO resources, */
tcp_lro_free(&rx_ring->lro);
/* free allocated memory */
free(rx_ring->rx_buffer_info, M_DEVBUF);
rx_ring->rx_buffer_info = NULL;
free(rx_ring->free_rx_ids, M_DEVBUF);
rx_ring->free_rx_ids = NULL;
}
/**
* ena_setup_all_rx_resources - allocate all queues Rx resources
* @adapter: network interface device structure
*
* Returns 0 on success, otherwise on failure.
**/
static int
ena_setup_all_rx_resources(struct ena_adapter *adapter)
{
int i, rc = 0;
for (i = 0; i < adapter->num_io_queues; i++) {
rc = ena_setup_rx_resources(adapter, i);
if (rc != 0) {
device_printf(adapter->pdev,
"Allocation for Rx Queue %u failed\n", i);
goto err_setup_rx;
}
}
return (0);
err_setup_rx:
/* rewind the index freeing the rings as we go */
while (i--)
ena_free_rx_resources(adapter, i);
return (rc);
}
/**
* ena_free_all_rx_resources - Free Rx resources for all queues
* @adapter: network interface device structure
*
* Free all receive software resources
**/
static void
ena_free_all_rx_resources(struct ena_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_io_queues; i++)
ena_free_rx_resources(adapter, i);
}
static inline int
ena_alloc_rx_mbuf(struct ena_adapter *adapter,
struct ena_ring *rx_ring, struct ena_rx_buffer *rx_info)
{
struct ena_com_buf *ena_buf;
bus_dma_segment_t segs[1];
int nsegs, error;
int mlen;
/* if previous allocated frag is not used */
if (unlikely(rx_info->mbuf != NULL))
return (0);
/* Get mbuf using UMA allocator */
rx_info->mbuf = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
rx_ring->rx_mbuf_sz);
if (unlikely(rx_info->mbuf == NULL)) {
counter_u64_add(rx_ring->rx_stats.mjum_alloc_fail, 1);
rx_info->mbuf = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
if (unlikely(rx_info->mbuf == NULL)) {
counter_u64_add(rx_ring->rx_stats.mbuf_alloc_fail, 1);
return (ENOMEM);
}
mlen = MCLBYTES;
} else {
mlen = rx_ring->rx_mbuf_sz;
}
/* Set mbuf length*/
rx_info->mbuf->m_pkthdr.len = rx_info->mbuf->m_len = mlen;
/* Map packets for DMA */
ena_trace(NULL, ENA_DBG | ENA_RSC | ENA_RXPTH,
"Using tag %p for buffers' DMA mapping, mbuf %p len: %d\n",
adapter->rx_buf_tag,rx_info->mbuf, rx_info->mbuf->m_len);
error = bus_dmamap_load_mbuf_sg(adapter->rx_buf_tag, rx_info->map,
rx_info->mbuf, segs, &nsegs, BUS_DMA_NOWAIT);
if (unlikely((error != 0) || (nsegs != 1))) {
ena_trace(NULL, ENA_WARNING, "failed to map mbuf, error: %d, "
"nsegs: %d\n", error, nsegs);
counter_u64_add(rx_ring->rx_stats.dma_mapping_err, 1);
goto exit;
}
bus_dmamap_sync(adapter->rx_buf_tag, rx_info->map, BUS_DMASYNC_PREREAD);
ena_buf = &rx_info->ena_buf;
ena_buf->paddr = segs[0].ds_addr;
ena_buf->len = mlen;
ena_trace(NULL, ENA_DBG | ENA_RSC | ENA_RXPTH,
"ALLOC RX BUF: mbuf %p, rx_info %p, len %d, paddr %#jx\n",
rx_info->mbuf, rx_info,ena_buf->len, (uintmax_t)ena_buf->paddr);
return (0);
exit:
m_freem(rx_info->mbuf);
rx_info->mbuf = NULL;
return (EFAULT);
}
static void
ena_free_rx_mbuf(struct ena_adapter *adapter, struct ena_ring *rx_ring,
struct ena_rx_buffer *rx_info)
{
if (rx_info->mbuf == NULL) {
ena_trace(NULL, ENA_WARNING, "Trying to free unallocated buffer\n");
return;
}
bus_dmamap_sync(adapter->rx_buf_tag, rx_info->map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(adapter->rx_buf_tag, rx_info->map);
m_freem(rx_info->mbuf);
rx_info->mbuf = NULL;
}
/**
* ena_refill_rx_bufs - Refills ring with descriptors
* @rx_ring: the ring which we want to feed with free descriptors
* @num: number of descriptors to refill
* Refills the ring with newly allocated DMA-mapped mbufs for receiving
**/
int
ena_refill_rx_bufs(struct ena_ring *rx_ring, uint32_t num)
{
struct ena_adapter *adapter = rx_ring->adapter;
uint16_t next_to_use, req_id;
uint32_t i;
int rc;
ena_trace(NULL, ENA_DBG | ENA_RXPTH | ENA_RSC, "refill qid: %d\n",
rx_ring->qid);
next_to_use = rx_ring->next_to_use;
for (i = 0; i < num; i++) {
struct ena_rx_buffer *rx_info;
ena_trace(NULL, ENA_DBG | ENA_RXPTH | ENA_RSC,
"RX buffer - next to use: %d\n", next_to_use);
req_id = rx_ring->free_rx_ids[next_to_use];
rx_info = &rx_ring->rx_buffer_info[req_id];
#ifdef DEV_NETMAP
if (ena_rx_ring_in_netmap(adapter, rx_ring->qid))
rc = ena_netmap_alloc_rx_slot(adapter, rx_ring, rx_info);
else
#endif /* DEV_NETMAP */
rc = ena_alloc_rx_mbuf(adapter, rx_ring, rx_info);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_WARNING,
"failed to alloc buffer for rx queue %d\n",
rx_ring->qid);
break;
}
rc = ena_com_add_single_rx_desc(rx_ring->ena_com_io_sq,
&rx_info->ena_buf, req_id);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_WARNING,
"failed to add buffer for rx queue %d\n",
rx_ring->qid);
break;
}
next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use,
rx_ring->ring_size);
}
if (unlikely(i < num)) {
counter_u64_add(rx_ring->rx_stats.refil_partial, 1);
ena_trace(NULL, ENA_WARNING,
"refilled rx qid %d with only %d mbufs (from %d)\n",
rx_ring->qid, i, num);
}
if (likely(i != 0))
ena_com_write_sq_doorbell(rx_ring->ena_com_io_sq);
rx_ring->next_to_use = next_to_use;
return (i);
}
int
ena_update_buf_ring_size(struct ena_adapter *adapter,
uint32_t new_buf_ring_size)
{
uint32_t old_buf_ring_size;
int rc = 0;
bool dev_was_up;
ENA_LOCK_LOCK(adapter);
old_buf_ring_size = adapter->buf_ring_size;
adapter->buf_ring_size = new_buf_ring_size;
dev_was_up = ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter);
ena_down(adapter);
/* Reconfigure buf ring for all Tx rings. */
ena_free_all_io_rings_resources(adapter);
ena_init_io_rings_advanced(adapter);
if (dev_was_up) {
/*
* If ena_up() fails, it's not because of recent buf_ring size
* changes. Because of that, we just want to revert old drbr
* value and trigger the reset because something else had to
* go wrong.
*/
rc = ena_up(adapter);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"Failed to configure device after setting new drbr size: %u. Reverting old value: %u and triggering the reset\n",
new_buf_ring_size, old_buf_ring_size);
/* Revert old size and trigger the reset */
adapter->buf_ring_size = old_buf_ring_size;
ena_free_all_io_rings_resources(adapter);
ena_init_io_rings_advanced(adapter);
ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEV_UP_BEFORE_RESET,
adapter);
ena_trigger_reset(adapter, ENA_REGS_RESET_OS_TRIGGER);
}
}
ENA_LOCK_UNLOCK(adapter);
return (rc);
}
int
ena_update_queue_size(struct ena_adapter *adapter, uint32_t new_tx_size,
uint32_t new_rx_size)
{
uint32_t old_tx_size, old_rx_size;
int rc = 0;
bool dev_was_up;
ENA_LOCK_LOCK(adapter);
old_tx_size = adapter->requested_tx_ring_size;
old_rx_size = adapter->requested_rx_ring_size;
adapter->requested_tx_ring_size = new_tx_size;
adapter->requested_rx_ring_size = new_rx_size;
dev_was_up = ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter);
ena_down(adapter);
/* Configure queues with new size. */
ena_init_io_rings_basic(adapter);
if (dev_was_up) {
rc = ena_up(adapter);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"Failed to configure device with the new sizes - Tx: %u Rx: %u. Reverting old values - Tx: %u Rx: %u\n",
new_tx_size, new_rx_size, old_tx_size, old_rx_size);
/* Revert old size. */
adapter->requested_tx_ring_size = old_tx_size;
adapter->requested_rx_ring_size = old_rx_size;
ena_init_io_rings_basic(adapter);
/* And try again. */
rc = ena_up(adapter);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"Failed to revert old queue sizes. Triggering device reset.\n");
/*
* If we've failed again, something had to go
* wrong. After reset, the device should try to
* go up
*/
ENA_FLAG_SET_ATOMIC(
ENA_FLAG_DEV_UP_BEFORE_RESET, adapter);
ena_trigger_reset(adapter,
ENA_REGS_RESET_OS_TRIGGER);
}
}
}
ENA_LOCK_UNLOCK(adapter);
return (rc);
}
static void
ena_update_io_rings(struct ena_adapter *adapter, uint32_t num)
{
ena_free_all_io_rings_resources(adapter);
/* Force indirection table to be reinitialized */
ena_com_rss_destroy(adapter->ena_dev);
adapter->num_io_queues = num;
ena_init_io_rings(adapter);
}
/* Caller should sanitize new_num */
int
ena_update_io_queue_nb(struct ena_adapter *adapter, uint32_t new_num)
{
uint32_t old_num;
int rc = 0;
bool dev_was_up;
ENA_LOCK_LOCK(adapter);
dev_was_up = ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter);
old_num = adapter->num_io_queues;
ena_down(adapter);
ena_update_io_rings(adapter, new_num);
if (dev_was_up) {
rc = ena_up(adapter);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"Failed to configure device with %u IO queues. "
"Reverting to previous value: %u\n",
new_num, old_num);
ena_update_io_rings(adapter, old_num);
rc = ena_up(adapter);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"Failed to revert to previous setup IO "
"queues. Triggering device reset.\n");
ENA_FLAG_SET_ATOMIC(
ENA_FLAG_DEV_UP_BEFORE_RESET, adapter);
ena_trigger_reset(adapter,
ENA_REGS_RESET_OS_TRIGGER);
}
}
}
ENA_LOCK_UNLOCK(adapter);
return (rc);
}
static void
ena_free_rx_bufs(struct ena_adapter *adapter, unsigned int qid)
{
struct ena_ring *rx_ring = &adapter->rx_ring[qid];
unsigned int i;
for (i = 0; i < rx_ring->ring_size; i++) {
struct ena_rx_buffer *rx_info = &rx_ring->rx_buffer_info[i];
if (rx_info->mbuf != NULL)
ena_free_rx_mbuf(adapter, rx_ring, rx_info);
#ifdef DEV_NETMAP
if (((if_getflags(adapter->ifp) & IFF_DYING) == 0) &&
(adapter->ifp->if_capenable & IFCAP_NETMAP)) {
if (rx_info->netmap_buf_idx != 0)
ena_netmap_free_rx_slot(adapter, rx_ring,
rx_info);
}
#endif /* DEV_NETMAP */
}
}
/**
* ena_refill_all_rx_bufs - allocate all queues Rx buffers
* @adapter: network interface device structure
*
*/
static void
ena_refill_all_rx_bufs(struct ena_adapter *adapter)
{
struct ena_ring *rx_ring;
int i, rc, bufs_num;
for (i = 0; i < adapter->num_io_queues; i++) {
rx_ring = &adapter->rx_ring[i];
bufs_num = rx_ring->ring_size - 1;
rc = ena_refill_rx_bufs(rx_ring, bufs_num);
if (unlikely(rc != bufs_num))
ena_trace(NULL, ENA_WARNING, "refilling Queue %d failed. "
"Allocated %d buffers from: %d\n", i, rc, bufs_num);
#ifdef DEV_NETMAP
rx_ring->initialized = true;
#endif /* DEV_NETMAP */
}
}
static void
ena_free_all_rx_bufs(struct ena_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_io_queues; i++)
ena_free_rx_bufs(adapter, i);
}
/**
* ena_free_tx_bufs - Free Tx Buffers per Queue
* @adapter: network interface device structure
* @qid: queue index
**/
static void
ena_free_tx_bufs(struct ena_adapter *adapter, unsigned int qid)
{
bool print_once = true;
struct ena_ring *tx_ring = &adapter->tx_ring[qid];
ENA_RING_MTX_LOCK(tx_ring);
for (int i = 0; i < tx_ring->ring_size; i++) {
struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
if (tx_info->mbuf == NULL)
continue;
if (print_once) {
device_printf(adapter->pdev,
"free uncompleted tx mbuf qid %d idx 0x%x\n",
qid, i);
print_once = false;
} else {
ena_trace(NULL, ENA_DBG,
"free uncompleted tx mbuf qid %d idx 0x%x\n",
qid, i);
}
bus_dmamap_sync(adapter->tx_buf_tag, tx_info->dmamap,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(adapter->tx_buf_tag, tx_info->dmamap);
m_free(tx_info->mbuf);
tx_info->mbuf = NULL;
}
ENA_RING_MTX_UNLOCK(tx_ring);
}
static void
ena_free_all_tx_bufs(struct ena_adapter *adapter)
{
for (int i = 0; i < adapter->num_io_queues; i++)
ena_free_tx_bufs(adapter, i);
}
static void
ena_destroy_all_tx_queues(struct ena_adapter *adapter)
{
uint16_t ena_qid;
int i;
for (i = 0; i < adapter->num_io_queues; i++) {
ena_qid = ENA_IO_TXQ_IDX(i);
ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
}
}
static void
ena_destroy_all_rx_queues(struct ena_adapter *adapter)
{
uint16_t ena_qid;
int i;
for (i = 0; i < adapter->num_io_queues; i++) {
ena_qid = ENA_IO_RXQ_IDX(i);
ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
}
}
static void
ena_destroy_all_io_queues(struct ena_adapter *adapter)
{
struct ena_que *queue;
int i;
for (i = 0; i < adapter->num_io_queues; i++) {
queue = &adapter->que[i];
while (taskqueue_cancel(queue->cleanup_tq,
&queue->cleanup_task, NULL))
taskqueue_drain(queue->cleanup_tq,
&queue->cleanup_task);
taskqueue_free(queue->cleanup_tq);
}
ena_destroy_all_tx_queues(adapter);
ena_destroy_all_rx_queues(adapter);
}
static int
ena_create_io_queues(struct ena_adapter *adapter)
{
struct ena_com_dev *ena_dev = adapter->ena_dev;
struct ena_com_create_io_ctx ctx;
struct ena_ring *ring;
struct ena_que *queue;
uint16_t ena_qid;
uint32_t msix_vector;
int rc, i;
/* Create TX queues */
for (i = 0; i < adapter->num_io_queues; i++) {
msix_vector = ENA_IO_IRQ_IDX(i);
ena_qid = ENA_IO_TXQ_IDX(i);
ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
ctx.queue_size = adapter->requested_tx_ring_size;
ctx.msix_vector = msix_vector;
ctx.qid = ena_qid;
rc = ena_com_create_io_queue(ena_dev, &ctx);
if (rc != 0) {
device_printf(adapter->pdev,
"Failed to create io TX queue #%d rc: %d\n", i, rc);
goto err_tx;
}
ring = &adapter->tx_ring[i];
rc = ena_com_get_io_handlers(ena_dev, ena_qid,
&ring->ena_com_io_sq,
&ring->ena_com_io_cq);
if (rc != 0) {
device_printf(adapter->pdev,
"Failed to get TX queue handlers. TX queue num"
" %d rc: %d\n", i, rc);
ena_com_destroy_io_queue(ena_dev, ena_qid);
goto err_tx;
}
}
/* Create RX queues */
for (i = 0; i < adapter->num_io_queues; i++) {
msix_vector = ENA_IO_IRQ_IDX(i);
ena_qid = ENA_IO_RXQ_IDX(i);
ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
ctx.queue_size = adapter->requested_rx_ring_size;
ctx.msix_vector = msix_vector;
ctx.qid = ena_qid;
rc = ena_com_create_io_queue(ena_dev, &ctx);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"Failed to create io RX queue[%d] rc: %d\n", i, rc);
goto err_rx;
}
ring = &adapter->rx_ring[i];
rc = ena_com_get_io_handlers(ena_dev, ena_qid,
&ring->ena_com_io_sq,
&ring->ena_com_io_cq);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"Failed to get RX queue handlers. RX queue num"
" %d rc: %d\n", i, rc);
ena_com_destroy_io_queue(ena_dev, ena_qid);
goto err_rx;
}
}
for (i = 0; i < adapter->num_io_queues; i++) {
queue = &adapter->que[i];
NET_TASK_INIT(&queue->cleanup_task, 0, ena_cleanup, queue);
queue->cleanup_tq = taskqueue_create_fast("ena cleanup",
M_WAITOK, taskqueue_thread_enqueue, &queue->cleanup_tq);
taskqueue_start_threads(&queue->cleanup_tq, 1, PI_NET,
"%s queue %d cleanup",
device_get_nameunit(adapter->pdev), i);
}
return (0);
err_rx:
while (i--)
ena_com_destroy_io_queue(ena_dev, ENA_IO_RXQ_IDX(i));
i = adapter->num_io_queues;
err_tx:
while (i--)
ena_com_destroy_io_queue(ena_dev, ENA_IO_TXQ_IDX(i));
return (ENXIO);
}
/*********************************************************************
*
* MSIX & Interrupt Service routine
*
**********************************************************************/
/**
* ena_handle_msix - MSIX Interrupt Handler for admin/async queue
* @arg: interrupt number
**/
static void
ena_intr_msix_mgmnt(void *arg)
{
struct ena_adapter *adapter = (struct ena_adapter *)arg;
ena_com_admin_q_comp_intr_handler(adapter->ena_dev);
if (likely(ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter)))
ena_com_aenq_intr_handler(adapter->ena_dev, arg);
}
/**
* ena_handle_msix - MSIX Interrupt Handler for Tx/Rx
* @arg: queue
**/
static int
ena_handle_msix(void *arg)
{
struct ena_que *queue = arg;
struct ena_adapter *adapter = queue->adapter;
if_t ifp = adapter->ifp;
if (unlikely((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0))
return (FILTER_STRAY);
taskqueue_enqueue(queue->cleanup_tq, &queue->cleanup_task);
return (FILTER_HANDLED);
}
static int
ena_enable_msix(struct ena_adapter *adapter)
{
device_t dev = adapter->pdev;
int msix_vecs, msix_req;
int i, rc = 0;
if (ENA_FLAG_ISSET(ENA_FLAG_MSIX_ENABLED, adapter)) {
device_printf(dev, "Error, MSI-X is already enabled\n");
return (EINVAL);
}
/* Reserved the max msix vectors we might need */
msix_vecs = ENA_MAX_MSIX_VEC(adapter->max_num_io_queues);
adapter->msix_entries = malloc(msix_vecs * sizeof(struct msix_entry),
M_DEVBUF, M_WAITOK | M_ZERO);
ena_trace(NULL, ENA_DBG, "trying to enable MSI-X, vectors: %d\n", msix_vecs);
for (i = 0; i < msix_vecs; i++) {
adapter->msix_entries[i].entry = i;
/* Vectors must start from 1 */
adapter->msix_entries[i].vector = i + 1;
}
msix_req = msix_vecs;
rc = pci_alloc_msix(dev, &msix_vecs);
if (unlikely(rc != 0)) {
device_printf(dev,
"Failed to enable MSIX, vectors %d rc %d\n", msix_vecs, rc);
rc = ENOSPC;
goto err_msix_free;
}
if (msix_vecs != msix_req) {
if (msix_vecs == ENA_ADMIN_MSIX_VEC) {
device_printf(dev,
"Not enough number of MSI-x allocated: %d\n",
msix_vecs);
pci_release_msi(dev);
rc = ENOSPC;
goto err_msix_free;
}
device_printf(dev, "Enable only %d MSI-x (out of %d), reduce "
"the number of queues\n", msix_vecs, msix_req);
}
adapter->msix_vecs = msix_vecs;
ENA_FLAG_SET_ATOMIC(ENA_FLAG_MSIX_ENABLED, adapter);
return (0);
err_msix_free:
free(adapter->msix_entries, M_DEVBUF);
adapter->msix_entries = NULL;
return (rc);
}
static void
ena_setup_mgmnt_intr(struct ena_adapter *adapter)
{
snprintf(adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].name,
ENA_IRQNAME_SIZE, "ena-mgmnt@pci:%s",
device_get_nameunit(adapter->pdev));
/*
* Handler is NULL on purpose, it will be set
* when mgmnt interrupt is acquired
*/
adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].handler = NULL;
adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].data = adapter;
adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].vector =
adapter->msix_entries[ENA_MGMNT_IRQ_IDX].vector;
}
static int
ena_setup_io_intr(struct ena_adapter *adapter)
{
static int last_bind_cpu = -1;
int irq_idx;
if (adapter->msix_entries == NULL)
return (EINVAL);
for (int i = 0; i < adapter->num_io_queues; i++) {
irq_idx = ENA_IO_IRQ_IDX(i);
snprintf(adapter->irq_tbl[irq_idx].name, ENA_IRQNAME_SIZE,
"%s-TxRx-%d", device_get_nameunit(adapter->pdev), i);
adapter->irq_tbl[irq_idx].handler = ena_handle_msix;
adapter->irq_tbl[irq_idx].data = &adapter->que[i];
adapter->irq_tbl[irq_idx].vector =
adapter->msix_entries[irq_idx].vector;
ena_trace(NULL, ENA_INFO | ENA_IOQ, "ena_setup_io_intr vector: %d\n",
adapter->msix_entries[irq_idx].vector);
/*
* We want to bind rings to the corresponding cpu
* using something similar to the RSS round-robin technique.
*/
if (unlikely(last_bind_cpu < 0))
last_bind_cpu = CPU_FIRST();
adapter->que[i].cpu = adapter->irq_tbl[irq_idx].cpu =
last_bind_cpu;
last_bind_cpu = CPU_NEXT(last_bind_cpu);
}
return (0);
}
static int
ena_request_mgmnt_irq(struct ena_adapter *adapter)
{
struct ena_irq *irq;
unsigned long flags;
int rc, rcc;
flags = RF_ACTIVE | RF_SHAREABLE;
irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
irq->res = bus_alloc_resource_any(adapter->pdev, SYS_RES_IRQ,
&irq->vector, flags);
if (unlikely(irq->res == NULL)) {
device_printf(adapter->pdev, "could not allocate "
"irq vector: %d\n", irq->vector);
return (ENXIO);
}
rc = bus_setup_intr(adapter->pdev, irq->res,
INTR_TYPE_NET | INTR_MPSAFE, NULL, ena_intr_msix_mgmnt,
irq->data, &irq->cookie);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev, "failed to register "
"interrupt handler for irq %ju: %d\n",
rman_get_start(irq->res), rc);
goto err_res_free;
}
irq->requested = true;
return (rc);
err_res_free:
ena_trace(NULL, ENA_INFO | ENA_ADMQ, "releasing resource for irq %d\n",
irq->vector);
rcc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
irq->vector, irq->res);
if (unlikely(rcc != 0))
device_printf(adapter->pdev, "dev has no parent while "
"releasing res for irq: %d\n", irq->vector);
irq->res = NULL;
return (rc);
}
static int
ena_request_io_irq(struct ena_adapter *adapter)
{
struct ena_irq *irq;
unsigned long flags = 0;
int rc = 0, i, rcc;
if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_MSIX_ENABLED, adapter))) {
device_printf(adapter->pdev,
"failed to request I/O IRQ: MSI-X is not enabled\n");
return (EINVAL);
} else {
flags = RF_ACTIVE | RF_SHAREABLE;
}
for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
irq = &adapter->irq_tbl[i];
if (unlikely(irq->requested))
continue;
irq->res = bus_alloc_resource_any(adapter->pdev, SYS_RES_IRQ,
&irq->vector, flags);
if (unlikely(irq->res == NULL)) {
rc = ENOMEM;
device_printf(adapter->pdev, "could not allocate "
"irq vector: %d\n", irq->vector);
goto err;
}
rc = bus_setup_intr(adapter->pdev, irq->res,
INTR_TYPE_NET | INTR_MPSAFE, irq->handler, NULL,
irq->data, &irq->cookie);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev, "failed to register "
"interrupt handler for irq %ju: %d\n",
rman_get_start(irq->res), rc);
goto err;
}
irq->requested = true;
ena_trace(NULL, ENA_INFO, "queue %d - cpu %d\n",
i - ENA_IO_IRQ_FIRST_IDX, irq->cpu);
}
return (rc);
err:
for (; i >= ENA_IO_IRQ_FIRST_IDX; i--) {
irq = &adapter->irq_tbl[i];
rcc = 0;
/* Once we entered err: section and irq->requested is true we
free both intr and resources */
if (irq->requested)
rcc = bus_teardown_intr(adapter->pdev, irq->res, irq->cookie);
if (unlikely(rcc != 0))
device_printf(adapter->pdev, "could not release"
" irq: %d, error: %d\n", irq->vector, rcc);
/* If we entred err: section without irq->requested set we know
it was bus_alloc_resource_any() that needs cleanup, provided
res is not NULL. In case res is NULL no work in needed in
this iteration */
rcc = 0;
if (irq->res != NULL) {
rcc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
irq->vector, irq->res);
}
if (unlikely(rcc != 0))
device_printf(adapter->pdev, "dev has no parent while "
"releasing res for irq: %d\n", irq->vector);
irq->requested = false;
irq->res = NULL;
}
return (rc);
}
static void
ena_free_mgmnt_irq(struct ena_adapter *adapter)
{
struct ena_irq *irq;
int rc;
irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
if (irq->requested) {
ena_trace(NULL, ENA_INFO | ENA_ADMQ, "tear down irq: %d\n",
irq->vector);
rc = bus_teardown_intr(adapter->pdev, irq->res, irq->cookie);
if (unlikely(rc != 0))
device_printf(adapter->pdev, "failed to tear "
"down irq: %d\n", irq->vector);
irq->requested = 0;
}
if (irq->res != NULL) {
ena_trace(NULL, ENA_INFO | ENA_ADMQ, "release resource irq: %d\n",
irq->vector);
rc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
irq->vector, irq->res);
irq->res = NULL;
if (unlikely(rc != 0))
device_printf(adapter->pdev, "dev has no parent while "
"releasing res for irq: %d\n", irq->vector);
}
}
static void
ena_free_io_irq(struct ena_adapter *adapter)
{
struct ena_irq *irq;
int rc;
for (int i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
irq = &adapter->irq_tbl[i];
if (irq->requested) {
ena_trace(NULL, ENA_INFO | ENA_IOQ, "tear down irq: %d\n",
irq->vector);
rc = bus_teardown_intr(adapter->pdev, irq->res,
irq->cookie);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev, "failed to tear "
"down irq: %d\n", irq->vector);
}
irq->requested = 0;
}
if (irq->res != NULL) {
ena_trace(NULL, ENA_INFO | ENA_IOQ, "release resource irq: %d\n",
irq->vector);
rc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
irq->vector, irq->res);
irq->res = NULL;
if (unlikely(rc != 0)) {
device_printf(adapter->pdev, "dev has no parent"
" while releasing res for irq: %d\n",
irq->vector);
}
}
}
}
static void
ena_free_irqs(struct ena_adapter* adapter)
{
ena_free_io_irq(adapter);
ena_free_mgmnt_irq(adapter);
ena_disable_msix(adapter);
}
static void
ena_disable_msix(struct ena_adapter *adapter)
{
if (ENA_FLAG_ISSET(ENA_FLAG_MSIX_ENABLED, adapter)) {
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_MSIX_ENABLED, adapter);
pci_release_msi(adapter->pdev);
}
adapter->msix_vecs = 0;
if (adapter->msix_entries != NULL)
free(adapter->msix_entries, M_DEVBUF);
adapter->msix_entries = NULL;
}
static void
ena_unmask_all_io_irqs(struct ena_adapter *adapter)
{
struct ena_com_io_cq* io_cq;
struct ena_eth_io_intr_reg intr_reg;
uint16_t ena_qid;
int i;
/* Unmask interrupts for all queues */
for (i = 0; i < adapter->num_io_queues; i++) {
ena_qid = ENA_IO_TXQ_IDX(i);
io_cq = &adapter->ena_dev->io_cq_queues[ena_qid];
ena_com_update_intr_reg(&intr_reg, 0, 0, true);
ena_com_unmask_intr(io_cq, &intr_reg);
}
}
/* Configure the Rx forwarding */
static int
ena_rss_configure(struct ena_adapter *adapter)
{
struct ena_com_dev *ena_dev = adapter->ena_dev;
int rc;
/* In case the RSS table was destroyed */
if (!ena_dev->rss.tbl_log_size) {
rc = ena_rss_init_default(adapter);
if (unlikely((rc != 0) && (rc != EOPNOTSUPP))) {
device_printf(adapter->pdev,
"WARNING: RSS was not properly re-initialized,"
" it will affect bandwidth\n");
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_RSS_ACTIVE, adapter);
return (rc);
}
}
/* Set indirect table */
rc = ena_com_indirect_table_set(ena_dev);
if (unlikely((rc != 0) && (rc != EOPNOTSUPP)))
return (rc);
/* Configure hash function (if supported) */
rc = ena_com_set_hash_function(ena_dev);
if (unlikely((rc != 0) && (rc != EOPNOTSUPP)))
return (rc);
/* Configure hash inputs (if supported) */
rc = ena_com_set_hash_ctrl(ena_dev);
if (unlikely((rc != 0) && (rc != EOPNOTSUPP)))
return (rc);
return (0);
}
static int
ena_up_complete(struct ena_adapter *adapter)
{
int rc;
if (likely(ENA_FLAG_ISSET(ENA_FLAG_RSS_ACTIVE, adapter))) {
rc = ena_rss_configure(adapter);
if (rc != 0) {
device_printf(adapter->pdev,
"Failed to configure RSS\n");
return (rc);
}
}
rc = ena_change_mtu(adapter->ifp, adapter->ifp->if_mtu);
if (unlikely(rc != 0))
return (rc);
ena_refill_all_rx_bufs(adapter);
ena_reset_counters((counter_u64_t *)&adapter->hw_stats,
sizeof(adapter->hw_stats));
return (0);
}
static void
set_io_rings_size(struct ena_adapter *adapter, int new_tx_size,
int new_rx_size)
{
int i;
for (i = 0; i < adapter->num_io_queues; i++) {
adapter->tx_ring[i].ring_size = new_tx_size;
adapter->rx_ring[i].ring_size = new_rx_size;
}
}
static int
create_queues_with_size_backoff(struct ena_adapter *adapter)
{
int rc;
uint32_t cur_rx_ring_size, cur_tx_ring_size;
uint32_t new_rx_ring_size, new_tx_ring_size;
/*
* Current queue sizes might be set to smaller than the requested
* ones due to past queue allocation failures.
*/
set_io_rings_size(adapter, adapter->requested_tx_ring_size,
adapter->requested_rx_ring_size);
while (1) {
/* Allocate transmit descriptors */
rc = ena_setup_all_tx_resources(adapter);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_ALERT, "err_setup_tx\n");
goto err_setup_tx;
}
/* Allocate receive descriptors */
rc = ena_setup_all_rx_resources(adapter);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_ALERT, "err_setup_rx\n");
goto err_setup_rx;
}
/* Create IO queues for Rx & Tx */
rc = ena_create_io_queues(adapter);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_ALERT,
"create IO queues failed\n");
goto err_io_que;
}
return (0);
err_io_que:
ena_free_all_rx_resources(adapter);
err_setup_rx:
ena_free_all_tx_resources(adapter);
err_setup_tx:
/*
* Lower the ring size if ENOMEM. Otherwise, return the
* error straightaway.
*/
if (unlikely(rc != ENOMEM)) {
ena_trace(NULL, ENA_ALERT,
"Queue creation failed with error code: %d\n", rc);
return (rc);
}
cur_tx_ring_size = adapter->tx_ring[0].ring_size;
cur_rx_ring_size = adapter->rx_ring[0].ring_size;
device_printf(adapter->pdev,
"Not enough memory to create queues with sizes TX=%d, RX=%d\n",
cur_tx_ring_size, cur_rx_ring_size);
new_tx_ring_size = cur_tx_ring_size;
new_rx_ring_size = cur_rx_ring_size;
/*
* Decrease the size of a larger queue, or decrease both if they are
* the same size.
*/
if (cur_rx_ring_size <= cur_tx_ring_size)
new_tx_ring_size = cur_tx_ring_size / 2;
if (cur_rx_ring_size >= cur_tx_ring_size)
new_rx_ring_size = cur_rx_ring_size / 2;
if (new_tx_ring_size < ENA_MIN_RING_SIZE ||
new_rx_ring_size < ENA_MIN_RING_SIZE) {
device_printf(adapter->pdev,
"Queue creation failed with the smallest possible queue size"
"of %d for both queues. Not retrying with smaller queues\n",
ENA_MIN_RING_SIZE);
return (rc);
}
set_io_rings_size(adapter, new_tx_ring_size, new_rx_ring_size);
}
}
int
ena_up(struct ena_adapter *adapter)
{
int rc = 0;
if (unlikely(device_is_attached(adapter->pdev) == 0)) {
device_printf(adapter->pdev, "device is not attached!\n");
return (ENXIO);
}
if (ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
return (0);
device_printf(adapter->pdev, "device is going UP\n");
/* setup interrupts for IO queues */
rc = ena_setup_io_intr(adapter);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_ALERT, "error setting up IO interrupt\n");
goto error;
}
rc = ena_request_io_irq(adapter);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_ALERT, "err_req_irq\n");
goto error;
}
device_printf(adapter->pdev,
"Creating %u IO queues. Rx queue size: %d, Tx queue size: %d, "
"LLQ is %s\n",
adapter->num_io_queues,
adapter->requested_rx_ring_size,
adapter->requested_tx_ring_size,
(adapter->ena_dev->tx_mem_queue_type ==
ENA_ADMIN_PLACEMENT_POLICY_DEV) ? "ENABLED" : "DISABLED");
rc = create_queues_with_size_backoff(adapter);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_ALERT,
"error creating queues with size backoff\n");
goto err_create_queues_with_backoff;
}
if (ENA_FLAG_ISSET(ENA_FLAG_LINK_UP, adapter))
if_link_state_change(adapter->ifp, LINK_STATE_UP);
rc = ena_up_complete(adapter);
if (unlikely(rc != 0))
goto err_up_complete;
counter_u64_add(adapter->dev_stats.interface_up, 1);
ena_update_hwassist(adapter);
if_setdrvflagbits(adapter->ifp, IFF_DRV_RUNNING,
IFF_DRV_OACTIVE);
/* Activate timer service only if the device is running.
* If this flag is not set, it means that the driver is being
* reset and timer service will be activated afterwards.
*/
if (ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter)) {
callout_reset_sbt(&adapter->timer_service, SBT_1S,
SBT_1S, ena_timer_service, (void *)adapter, 0);
}
ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEV_UP, adapter);
ena_unmask_all_io_irqs(adapter);
return (0);
err_up_complete:
ena_destroy_all_io_queues(adapter);
ena_free_all_rx_resources(adapter);
ena_free_all_tx_resources(adapter);
err_create_queues_with_backoff:
ena_free_io_irq(adapter);
error:
return (rc);
}
static uint64_t
ena_get_counter(if_t ifp, ift_counter cnt)
{
struct ena_adapter *adapter;
struct ena_hw_stats *stats;
adapter = if_getsoftc(ifp);
stats = &adapter->hw_stats;
switch (cnt) {
case IFCOUNTER_IPACKETS:
return (counter_u64_fetch(stats->rx_packets));
case IFCOUNTER_OPACKETS:
return (counter_u64_fetch(stats->tx_packets));
case IFCOUNTER_IBYTES:
return (counter_u64_fetch(stats->rx_bytes));
case IFCOUNTER_OBYTES:
return (counter_u64_fetch(stats->tx_bytes));
case IFCOUNTER_IQDROPS:
return (counter_u64_fetch(stats->rx_drops));
case IFCOUNTER_OQDROPS:
return (counter_u64_fetch(stats->tx_drops));
default:
return (if_get_counter_default(ifp, cnt));
}
}
static int
ena_media_change(if_t ifp)
{
/* Media Change is not supported by firmware */
return (0);
}
static void
ena_media_status(if_t ifp, struct ifmediareq *ifmr)
{
struct ena_adapter *adapter = if_getsoftc(ifp);
ena_trace(NULL, ENA_DBG, "enter\n");
ENA_LOCK_LOCK(adapter);
ifmr->ifm_status = IFM_AVALID;
ifmr->ifm_active = IFM_ETHER;
if (!ENA_FLAG_ISSET(ENA_FLAG_LINK_UP, adapter)) {
ENA_LOCK_UNLOCK(adapter);
ena_trace(NULL, ENA_INFO, "Link is down\n");
return;
}
ifmr->ifm_status |= IFM_ACTIVE;
ifmr->ifm_active |= IFM_UNKNOWN | IFM_FDX;
ENA_LOCK_UNLOCK(adapter);
}
static void
ena_init(void *arg)
{
struct ena_adapter *adapter = (struct ena_adapter *)arg;
if (!ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter)) {
ENA_LOCK_LOCK(adapter);
ena_up(adapter);
ENA_LOCK_UNLOCK(adapter);
}
}
static int
ena_ioctl(if_t ifp, u_long command, caddr_t data)
{
struct ena_adapter *adapter;
struct ifreq *ifr;
int rc;
adapter = ifp->if_softc;
ifr = (struct ifreq *)data;
/*
* Acquiring lock to prevent from running up and down routines parallel.
*/
rc = 0;
switch (command) {
case SIOCSIFMTU:
if (ifp->if_mtu == ifr->ifr_mtu)
break;
ENA_LOCK_LOCK(adapter);
ena_down(adapter);
ena_change_mtu(ifp, ifr->ifr_mtu);
rc = ena_up(adapter);
ENA_LOCK_UNLOCK(adapter);
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) != 0) {
if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) {
if ((ifp->if_flags & (IFF_PROMISC |
IFF_ALLMULTI)) != 0) {
device_printf(adapter->pdev,
"ioctl promisc/allmulti\n");
}
} else {
ENA_LOCK_LOCK(adapter);
rc = ena_up(adapter);
ENA_LOCK_UNLOCK(adapter);
}
} else {
if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) {
ENA_LOCK_LOCK(adapter);
ena_down(adapter);
ENA_LOCK_UNLOCK(adapter);
}
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
rc = ifmedia_ioctl(ifp, ifr, &adapter->media, command);
break;
case SIOCSIFCAP:
{
int reinit = 0;
if (ifr->ifr_reqcap != ifp->if_capenable) {
ifp->if_capenable = ifr->ifr_reqcap;
reinit = 1;
}
if ((reinit != 0) &&
((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0)) {
ENA_LOCK_LOCK(adapter);
ena_down(adapter);
rc = ena_up(adapter);
ENA_LOCK_UNLOCK(adapter);
}
}
break;
default:
rc = ether_ioctl(ifp, command, data);
break;
}
return (rc);
}
static int
ena_get_dev_offloads(struct ena_com_dev_get_features_ctx *feat)
{
int caps = 0;
if ((feat->offload.tx &
(ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_FULL_MASK |
ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK |
ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L3_CSUM_IPV4_MASK)) != 0)
caps |= IFCAP_TXCSUM;
if ((feat->offload.tx &
(ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_FULL_MASK |
ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK)) != 0)
caps |= IFCAP_TXCSUM_IPV6;
if ((feat->offload.tx &
ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK) != 0)
caps |= IFCAP_TSO4;
if ((feat->offload.tx &
ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK) != 0)
caps |= IFCAP_TSO6;
if ((feat->offload.rx_supported &
(ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK |
ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L3_CSUM_IPV4_MASK)) != 0)
caps |= IFCAP_RXCSUM;
if ((feat->offload.rx_supported &
ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK) != 0)
caps |= IFCAP_RXCSUM_IPV6;
caps |= IFCAP_LRO | IFCAP_JUMBO_MTU;
return (caps);
}
static void
ena_update_host_info(struct ena_admin_host_info *host_info, if_t ifp)
{
host_info->supported_network_features[0] =
(uint32_t)if_getcapabilities(ifp);
}
static void
ena_update_hwassist(struct ena_adapter *adapter)
{
if_t ifp = adapter->ifp;
uint32_t feat = adapter->tx_offload_cap;
int cap = if_getcapenable(ifp);
int flags = 0;
if_clearhwassist(ifp);
if ((cap & IFCAP_TXCSUM) != 0) {
if ((feat &
ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L3_CSUM_IPV4_MASK) != 0)
flags |= CSUM_IP;
if ((feat &
(ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_FULL_MASK |
ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK)) != 0)
flags |= CSUM_IP_UDP | CSUM_IP_TCP;
}
if ((cap & IFCAP_TXCSUM_IPV6) != 0)
flags |= CSUM_IP6_UDP | CSUM_IP6_TCP;
if ((cap & IFCAP_TSO4) != 0)
flags |= CSUM_IP_TSO;
if ((cap & IFCAP_TSO6) != 0)
flags |= CSUM_IP6_TSO;
if_sethwassistbits(ifp, flags, 0);
}
static int
ena_setup_ifnet(device_t pdev, struct ena_adapter *adapter,
struct ena_com_dev_get_features_ctx *feat)
{
if_t ifp;
int caps = 0;
ifp = adapter->ifp = if_gethandle(IFT_ETHER);
if (unlikely(ifp == NULL)) {
ena_trace(NULL, ENA_ALERT, "can not allocate ifnet structure\n");
return (ENXIO);
}
if_initname(ifp, device_get_name(pdev), device_get_unit(pdev));
if_setdev(ifp, pdev);
if_setsoftc(ifp, adapter);
if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST |
IFF_KNOWSEPOCH);
if_setinitfn(ifp, ena_init);
if_settransmitfn(ifp, ena_mq_start);
if_setqflushfn(ifp, ena_qflush);
if_setioctlfn(ifp, ena_ioctl);
if_setgetcounterfn(ifp, ena_get_counter);
if_setsendqlen(ifp, adapter->requested_tx_ring_size);
if_setsendqready(ifp);
if_setmtu(ifp, ETHERMTU);
if_setbaudrate(ifp, 0);
/* Zeroize capabilities... */
if_setcapabilities(ifp, 0);
if_setcapenable(ifp, 0);
/* check hardware support */
caps = ena_get_dev_offloads(feat);
/* ... and set them */
if_setcapabilitiesbit(ifp, caps, 0);
/* TSO parameters */
ifp->if_hw_tsomax = ENA_TSO_MAXSIZE -
(ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN);
ifp->if_hw_tsomaxsegcount = adapter->max_tx_sgl_size - 1;
ifp->if_hw_tsomaxsegsize = ENA_TSO_MAXSIZE;
if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
if_setcapenable(ifp, if_getcapabilities(ifp));
/*
* Specify the media types supported by this adapter and register
* callbacks to update media and link information
*/
ifmedia_init(&adapter->media, IFM_IMASK,
ena_media_change, ena_media_status);
ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
ether_ifattach(ifp, adapter->mac_addr);
return (0);
}
void
ena_down(struct ena_adapter *adapter)
{
int rc;
if (!ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
return;
device_printf(adapter->pdev, "device is going DOWN\n");
callout_drain(&adapter->timer_service);
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_DEV_UP, adapter);
if_setdrvflagbits(adapter->ifp, IFF_DRV_OACTIVE,
IFF_DRV_RUNNING);
ena_free_io_irq(adapter);
if (ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter)) {
rc = ena_com_dev_reset(adapter->ena_dev,
adapter->reset_reason);
if (unlikely(rc != 0))
device_printf(adapter->pdev,
"Device reset failed\n");
}
ena_destroy_all_io_queues(adapter);
ena_free_all_tx_bufs(adapter);
ena_free_all_rx_bufs(adapter);
ena_free_all_tx_resources(adapter);
ena_free_all_rx_resources(adapter);
counter_u64_add(adapter->dev_stats.interface_down, 1);
}
static uint32_t
ena_calc_max_io_queue_num(device_t pdev, struct ena_com_dev *ena_dev,
struct ena_com_dev_get_features_ctx *get_feat_ctx)
{
uint32_t io_tx_sq_num, io_tx_cq_num, io_rx_num, max_num_io_queues;
/* Regular queues capabilities */
if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
struct ena_admin_queue_ext_feature_fields *max_queue_ext =
&get_feat_ctx->max_queue_ext.max_queue_ext;
io_rx_num = min_t(int, max_queue_ext->max_rx_sq_num,
max_queue_ext->max_rx_cq_num);
io_tx_sq_num = max_queue_ext->max_tx_sq_num;
io_tx_cq_num = max_queue_ext->max_tx_cq_num;
} else {
struct ena_admin_queue_feature_desc *max_queues =
&get_feat_ctx->max_queues;
io_tx_sq_num = max_queues->max_sq_num;
io_tx_cq_num = max_queues->max_cq_num;
io_rx_num = min_t(int, io_tx_sq_num, io_tx_cq_num);
}
/* In case of LLQ use the llq fields for the tx SQ/CQ */
if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
io_tx_sq_num = get_feat_ctx->llq.max_llq_num;
max_num_io_queues = min_t(uint32_t, mp_ncpus, ENA_MAX_NUM_IO_QUEUES);
max_num_io_queues = min_t(uint32_t, max_num_io_queues, io_rx_num);
max_num_io_queues = min_t(uint32_t, max_num_io_queues, io_tx_sq_num);
max_num_io_queues = min_t(uint32_t, max_num_io_queues, io_tx_cq_num);
/* 1 IRQ for for mgmnt and 1 IRQ for each TX/RX pair */
max_num_io_queues = min_t(uint32_t, max_num_io_queues,
pci_msix_count(pdev) - 1);
return (max_num_io_queues);
}
static int
ena_enable_wc(struct resource *res)
{
#if defined(__i386) || defined(__amd64) || defined(__aarch64__)
vm_offset_t va;
vm_size_t len;
int rc;
va = (vm_offset_t)rman_get_virtual(res);
len = rman_get_size(res);
/* Enable write combining */
rc = pmap_change_attr(va, len, VM_MEMATTR_WRITE_COMBINING);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_ALERT, "pmap_change_attr failed, %d\n", rc);
return (rc);
}
return (0);
#endif
return (EOPNOTSUPP);
}
static int
ena_set_queues_placement_policy(device_t pdev, struct ena_com_dev *ena_dev,
struct ena_admin_feature_llq_desc *llq,
struct ena_llq_configurations *llq_default_configurations)
{
struct ena_adapter *adapter = device_get_softc(pdev);
int rc, rid;
uint32_t llq_feature_mask;
llq_feature_mask = 1 << ENA_ADMIN_LLQ;
if (!(ena_dev->supported_features & llq_feature_mask)) {
device_printf(pdev,
"LLQ is not supported. Fallback to host mode policy.\n");
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
return (0);
}
rc = ena_com_config_dev_mode(ena_dev, llq, llq_default_configurations);
if (unlikely(rc != 0)) {
device_printf(pdev, "Failed to configure the device mode. "
"Fallback to host mode policy.\n");
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
return (0);
}
/* Nothing to config, exit */
if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
return (0);
/* Try to allocate resources for LLQ bar */
rid = PCIR_BAR(ENA_MEM_BAR);
adapter->memory = bus_alloc_resource_any(pdev, SYS_RES_MEMORY,
&rid, RF_ACTIVE);
if (unlikely(adapter->memory == NULL)) {
device_printf(pdev, "unable to allocate LLQ bar resource. "
"Fallback to host mode policy.\n");
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
return (0);
}
/* Enable write combining for better LLQ performance */
rc = ena_enable_wc(adapter->memory);
if (unlikely(rc != 0)) {
device_printf(pdev, "failed to enable write combining.\n");
return (rc);
}
/*
* Save virtual address of the device's memory region
* for the ena_com layer.
*/
ena_dev->mem_bar = rman_get_virtual(adapter->memory);
return (0);
}
static inline
void set_default_llq_configurations(struct ena_llq_configurations *llq_config)
{
llq_config->llq_header_location = ENA_ADMIN_INLINE_HEADER;
llq_config->llq_ring_entry_size = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
llq_config->llq_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
llq_config->llq_num_decs_before_header =
ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
llq_config->llq_ring_entry_size_value = 128;
}
static int
ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *ctx)
{
struct ena_admin_feature_llq_desc *llq = &ctx->get_feat_ctx->llq;
struct ena_com_dev *ena_dev = ctx->ena_dev;
uint32_t tx_queue_size = ENA_DEFAULT_RING_SIZE;
uint32_t rx_queue_size = ENA_DEFAULT_RING_SIZE;
uint32_t max_tx_queue_size;
uint32_t max_rx_queue_size;
if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
struct ena_admin_queue_ext_feature_fields *max_queue_ext =
&ctx->get_feat_ctx->max_queue_ext.max_queue_ext;
max_rx_queue_size = min_t(uint32_t,
max_queue_ext->max_rx_cq_depth,
max_queue_ext->max_rx_sq_depth);
max_tx_queue_size = max_queue_ext->max_tx_cq_depth;
if (ena_dev->tx_mem_queue_type ==
ENA_ADMIN_PLACEMENT_POLICY_DEV)
max_tx_queue_size = min_t(uint32_t, max_tx_queue_size,
llq->max_llq_depth);
else
max_tx_queue_size = min_t(uint32_t, max_tx_queue_size,
max_queue_ext->max_tx_sq_depth);
ctx->max_tx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
max_queue_ext->max_per_packet_tx_descs);
ctx->max_rx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
max_queue_ext->max_per_packet_rx_descs);
} else {
struct ena_admin_queue_feature_desc *max_queues =
&ctx->get_feat_ctx->max_queues;
max_rx_queue_size = min_t(uint32_t,
max_queues->max_cq_depth,
max_queues->max_sq_depth);
max_tx_queue_size = max_queues->max_cq_depth;
if (ena_dev->tx_mem_queue_type ==
ENA_ADMIN_PLACEMENT_POLICY_DEV)
max_tx_queue_size = min_t(uint32_t, max_tx_queue_size,
llq->max_llq_depth);
else
max_tx_queue_size = min_t(uint32_t, max_tx_queue_size,
max_queues->max_sq_depth);
ctx->max_tx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
max_queues->max_packet_tx_descs);
ctx->max_rx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
max_queues->max_packet_rx_descs);
}
/* round down to the nearest power of 2 */
max_tx_queue_size = 1 << (flsl(max_tx_queue_size) - 1);
max_rx_queue_size = 1 << (flsl(max_rx_queue_size) - 1);
tx_queue_size = clamp_val(tx_queue_size, ENA_MIN_RING_SIZE,
max_tx_queue_size);
rx_queue_size = clamp_val(rx_queue_size, ENA_MIN_RING_SIZE,
max_rx_queue_size);
tx_queue_size = 1 << (flsl(tx_queue_size) - 1);
rx_queue_size = 1 << (flsl(rx_queue_size) - 1);
ctx->max_tx_queue_size = max_tx_queue_size;
ctx->max_rx_queue_size = max_rx_queue_size;
ctx->tx_queue_size = tx_queue_size;
ctx->rx_queue_size = rx_queue_size;
return (0);
}
static int
ena_rss_init_default(struct ena_adapter *adapter)
{
struct ena_com_dev *ena_dev = adapter->ena_dev;
device_t dev = adapter->pdev;
int qid, rc, i;
rc = ena_com_rss_init(ena_dev, ENA_RX_RSS_TABLE_LOG_SIZE);
if (unlikely(rc != 0)) {
device_printf(dev, "Cannot init indirect table\n");
return (rc);
}
for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
qid = i % adapter->num_io_queues;
rc = ena_com_indirect_table_fill_entry(ena_dev, i,
ENA_IO_RXQ_IDX(qid));
if (unlikely((rc != 0) && (rc != EOPNOTSUPP))) {
device_printf(dev, "Cannot fill indirect table\n");
goto err_rss_destroy;
}
}
#ifdef RSS
uint8_t rss_algo = rss_gethashalgo();
if (rss_algo == RSS_HASH_TOEPLITZ) {
uint8_t hash_key[RSS_KEYSIZE];
rss_getkey(hash_key);
rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_TOEPLITZ,
hash_key, RSS_KEYSIZE, 0xFFFFFFFF);
} else
#endif
rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_CRC32, NULL,
ENA_HASH_KEY_SIZE, 0xFFFFFFFF);
if (unlikely((rc != 0) && (rc != EOPNOTSUPP))) {
device_printf(dev, "Cannot fill hash function\n");
goto err_rss_destroy;
}
rc = ena_com_set_default_hash_ctrl(ena_dev);
if (unlikely((rc != 0) && (rc != EOPNOTSUPP))) {
device_printf(dev, "Cannot fill hash control\n");
goto err_rss_destroy;
}
return (0);
err_rss_destroy:
ena_com_rss_destroy(ena_dev);
return (rc);
}
static void
ena_rss_init_default_deferred(void *arg)
{
struct ena_adapter *adapter;
devclass_t dc;
int max;
int rc;
dc = devclass_find("ena");
if (unlikely(dc == NULL)) {
ena_trace(NULL, ENA_ALERT, "No devclass ena\n");
return;
}
max = devclass_get_maxunit(dc);
while (max-- >= 0) {
adapter = devclass_get_softc(dc, max);
if (adapter != NULL) {
rc = ena_rss_init_default(adapter);
ENA_FLAG_SET_ATOMIC(ENA_FLAG_RSS_ACTIVE, adapter);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"WARNING: RSS was not properly initialized,"
" it will affect bandwidth\n");
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_RSS_ACTIVE, adapter);
}
}
}
}
SYSINIT(ena_rss_init, SI_SUB_KICK_SCHEDULER, SI_ORDER_SECOND, ena_rss_init_default_deferred, NULL);
static void
ena_config_host_info(struct ena_com_dev *ena_dev, device_t dev)
{
struct ena_admin_host_info *host_info;
uintptr_t rid;
int rc;
/* Allocate only the host info */
rc = ena_com_allocate_host_info(ena_dev);
if (unlikely(rc != 0)) {
ena_trace(NULL, ENA_ALERT, "Cannot allocate host info\n");
return;
}
host_info = ena_dev->host_attr.host_info;
if (pci_get_id(dev, PCI_ID_RID, &rid) == 0)
host_info->bdf = rid;
host_info->os_type = ENA_ADMIN_OS_FREEBSD;
host_info->kernel_ver = osreldate;
sprintf(host_info->kernel_ver_str, "%d", osreldate);
host_info->os_dist = 0;
strncpy(host_info->os_dist_str, osrelease,
sizeof(host_info->os_dist_str) - 1);
host_info->driver_version =
(DRV_MODULE_VER_MAJOR) |
(DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
(DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT);
host_info->num_cpus = mp_ncpus;
host_info->driver_supported_features =
ENA_ADMIN_HOST_INFO_RX_OFFSET_MASK;
rc = ena_com_set_host_attributes(ena_dev);
if (unlikely(rc != 0)) {
if (rc == EOPNOTSUPP)
ena_trace(NULL, ENA_WARNING, "Cannot set host attributes\n");
else
ena_trace(NULL, ENA_ALERT, "Cannot set host attributes\n");
goto err;
}
return;
err:
ena_com_delete_host_info(ena_dev);
}
static int
ena_device_init(struct ena_adapter *adapter, device_t pdev,
struct ena_com_dev_get_features_ctx *get_feat_ctx, int *wd_active)
{
struct ena_com_dev* ena_dev = adapter->ena_dev;
bool readless_supported;
uint32_t aenq_groups;
int dma_width;
int rc;
rc = ena_com_mmio_reg_read_request_init(ena_dev);
if (unlikely(rc != 0)) {
device_printf(pdev, "failed to init mmio read less\n");
return (rc);
}
/*
* The PCIe configuration space revision id indicate if mmio reg
* read is disabled
*/
readless_supported = !(pci_get_revid(pdev) & ENA_MMIO_DISABLE_REG_READ);
ena_com_set_mmio_read_mode(ena_dev, readless_supported);
rc = ena_com_dev_reset(ena_dev, ENA_REGS_RESET_NORMAL);
if (unlikely(rc != 0)) {
device_printf(pdev, "Can not reset device\n");
goto err_mmio_read_less;
}
rc = ena_com_validate_version(ena_dev);
if (unlikely(rc != 0)) {
device_printf(pdev, "device version is too low\n");
goto err_mmio_read_less;
}
dma_width = ena_com_get_dma_width(ena_dev);
if (unlikely(dma_width < 0)) {
device_printf(pdev, "Invalid dma width value %d", dma_width);
rc = dma_width;
goto err_mmio_read_less;
}
adapter->dma_width = dma_width;
/* ENA admin level init */
rc = ena_com_admin_init(ena_dev, &aenq_handlers);
if (unlikely(rc != 0)) {
device_printf(pdev,
"Can not initialize ena admin queue with device\n");
goto err_mmio_read_less;
}
/*
* To enable the msix interrupts the driver needs to know the number
* of queues. So the driver uses polling mode to retrieve this
* information
*/
ena_com_set_admin_polling_mode(ena_dev, true);
ena_config_host_info(ena_dev, pdev);
/* Get Device Attributes */
rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
if (unlikely(rc != 0)) {
device_printf(pdev,
"Cannot get attribute for ena device rc: %d\n", rc);
goto err_admin_init;
}
aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE) |
BIT(ENA_ADMIN_FATAL_ERROR) |
BIT(ENA_ADMIN_WARNING) |
BIT(ENA_ADMIN_NOTIFICATION) |
BIT(ENA_ADMIN_KEEP_ALIVE);
aenq_groups &= get_feat_ctx->aenq.supported_groups;
rc = ena_com_set_aenq_config(ena_dev, aenq_groups);
if (unlikely(rc != 0)) {
device_printf(pdev, "Cannot configure aenq groups rc: %d\n", rc);
goto err_admin_init;
}
*wd_active = !!(aenq_groups & BIT(ENA_ADMIN_KEEP_ALIVE));
return (0);
err_admin_init:
ena_com_delete_host_info(ena_dev);
ena_com_admin_destroy(ena_dev);
err_mmio_read_less:
ena_com_mmio_reg_read_request_destroy(ena_dev);
return (rc);
}
static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *adapter)
{
struct ena_com_dev *ena_dev = adapter->ena_dev;
int rc;
rc = ena_enable_msix(adapter);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev, "Error with MSI-X enablement\n");
return (rc);
}
ena_setup_mgmnt_intr(adapter);
rc = ena_request_mgmnt_irq(adapter);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev, "Cannot setup mgmnt queue intr\n");
goto err_disable_msix;
}
ena_com_set_admin_polling_mode(ena_dev, false);
ena_com_admin_aenq_enable(ena_dev);
return (0);
err_disable_msix:
ena_disable_msix(adapter);
return (rc);
}
/* Function called on ENA_ADMIN_KEEP_ALIVE event */
static void ena_keep_alive_wd(void *adapter_data,
struct ena_admin_aenq_entry *aenq_e)
{
struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
struct ena_admin_aenq_keep_alive_desc *desc;
sbintime_t stime;
uint64_t rx_drops;
uint64_t tx_drops;
desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e;
rx_drops = ((uint64_t)desc->rx_drops_high << 32) | desc->rx_drops_low;
tx_drops = ((uint64_t)desc->tx_drops_high << 32) | desc->tx_drops_low;
counter_u64_zero(adapter->hw_stats.rx_drops);
counter_u64_add(adapter->hw_stats.rx_drops, rx_drops);
counter_u64_zero(adapter->hw_stats.tx_drops);
counter_u64_add(adapter->hw_stats.tx_drops, tx_drops);
stime = getsbinuptime();
atomic_store_rel_64(&adapter->keep_alive_timestamp, stime);
}
/* Check for keep alive expiration */
static void check_for_missing_keep_alive(struct ena_adapter *adapter)
{
sbintime_t timestamp, time;
if (adapter->wd_active == 0)
return;
if (adapter->keep_alive_timeout == ENA_HW_HINTS_NO_TIMEOUT)
return;
timestamp = atomic_load_acq_64(&adapter->keep_alive_timestamp);
time = getsbinuptime() - timestamp;
if (unlikely(time > adapter->keep_alive_timeout)) {
device_printf(adapter->pdev,
"Keep alive watchdog timeout.\n");
counter_u64_add(adapter->dev_stats.wd_expired, 1);
ena_trigger_reset(adapter, ENA_REGS_RESET_KEEP_ALIVE_TO);
}
}
/* Check if admin queue is enabled */
static void check_for_admin_com_state(struct ena_adapter *adapter)
{
if (unlikely(ena_com_get_admin_running_state(adapter->ena_dev) ==
false)) {
device_printf(adapter->pdev,
"ENA admin queue is not in running state!\n");
counter_u64_add(adapter->dev_stats.admin_q_pause, 1);
ena_trigger_reset(adapter, ENA_REGS_RESET_ADMIN_TO);
}
}
static int
check_for_rx_interrupt_queue(struct ena_adapter *adapter,
struct ena_ring *rx_ring)
{
if (likely(rx_ring->first_interrupt))
return (0);
if (ena_com_cq_empty(rx_ring->ena_com_io_cq))
return (0);
rx_ring->no_interrupt_event_cnt++;
if (rx_ring->no_interrupt_event_cnt == ENA_MAX_NO_INTERRUPT_ITERATIONS) {
device_printf(adapter->pdev, "Potential MSIX issue on Rx side "
"Queue = %d. Reset the device\n", rx_ring->qid);
ena_trigger_reset(adapter, ENA_REGS_RESET_MISS_INTERRUPT);
return (EIO);
}
return (0);
}
static int
check_missing_comp_in_tx_queue(struct ena_adapter *adapter,
struct ena_ring *tx_ring)
{
struct bintime curtime, time;
struct ena_tx_buffer *tx_buf;
sbintime_t time_offset;
uint32_t missed_tx = 0;
int i, rc = 0;
getbinuptime(&curtime);
for (i = 0; i < tx_ring->ring_size; i++) {
tx_buf = &tx_ring->tx_buffer_info[i];
if (bintime_isset(&tx_buf->timestamp) == 0)
continue;
time = curtime;
bintime_sub(&time, &tx_buf->timestamp);
time_offset = bttosbt(time);
if (unlikely(!tx_ring->first_interrupt &&
time_offset > 2 * adapter->missing_tx_timeout)) {
/*
* If after graceful period interrupt is still not
* received, we schedule a reset.
*/
device_printf(adapter->pdev,
"Potential MSIX issue on Tx side Queue = %d. "
"Reset the device\n", tx_ring->qid);
ena_trigger_reset(adapter,
ENA_REGS_RESET_MISS_INTERRUPT);
return (EIO);
}
/* Check again if packet is still waiting */
if (unlikely(time_offset > adapter->missing_tx_timeout)) {
if (!tx_buf->print_once)
ena_trace(NULL, ENA_WARNING, "Found a Tx that wasn't "
"completed on time, qid %d, index %d.\n",
tx_ring->qid, i);
tx_buf->print_once = true;
missed_tx++;
}
}
if (unlikely(missed_tx > adapter->missing_tx_threshold)) {
device_printf(adapter->pdev,
"The number of lost tx completion is above the threshold "
"(%d > %d). Reset the device\n",
missed_tx, adapter->missing_tx_threshold);
ena_trigger_reset(adapter, ENA_REGS_RESET_MISS_TX_CMPL);
rc = EIO;
}
counter_u64_add(tx_ring->tx_stats.missing_tx_comp, missed_tx);
return (rc);
}
/*
* Check for TX which were not completed on time.
* Timeout is defined by "missing_tx_timeout".
* Reset will be performed if number of incompleted
* transactions exceeds "missing_tx_threshold".
*/
static void
check_for_missing_completions(struct ena_adapter *adapter)
{
struct ena_ring *tx_ring;
struct ena_ring *rx_ring;
int i, budget, rc;
/* Make sure the driver doesn't turn the device in other process */
rmb();
if (!ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
return;
if (ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter))
return;
if (adapter->missing_tx_timeout == ENA_HW_HINTS_NO_TIMEOUT)
return;
budget = adapter->missing_tx_max_queues;
for (i = adapter->next_monitored_tx_qid; i < adapter->num_io_queues; i++) {
tx_ring = &adapter->tx_ring[i];
rx_ring = &adapter->rx_ring[i];
rc = check_missing_comp_in_tx_queue(adapter, tx_ring);
if (unlikely(rc != 0))
return;
rc = check_for_rx_interrupt_queue(adapter, rx_ring);
if (unlikely(rc != 0))
return;
budget--;
if (budget == 0) {
i++;
break;
}
}
adapter->next_monitored_tx_qid = i % adapter->num_io_queues;
}
/* trigger rx cleanup after 2 consecutive detections */
#define EMPTY_RX_REFILL 2
/* For the rare case where the device runs out of Rx descriptors and the
* msix handler failed to refill new Rx descriptors (due to a lack of memory
* for example).
* This case will lead to a deadlock:
* The device won't send interrupts since all the new Rx packets will be dropped
* The msix handler won't allocate new Rx descriptors so the device won't be
* able to send new packets.
*
* When such a situation is detected - execute rx cleanup task in another thread
*/
static void
check_for_empty_rx_ring(struct ena_adapter *adapter)
{
struct ena_ring *rx_ring;
int i, refill_required;
if (!ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
return;
if (ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter))
return;
for (i = 0; i < adapter->num_io_queues; i++) {
rx_ring = &adapter->rx_ring[i];
refill_required = ena_com_free_q_entries(rx_ring->ena_com_io_sq);
if (unlikely(refill_required == (rx_ring->ring_size - 1))) {
rx_ring->empty_rx_queue++;
if (rx_ring->empty_rx_queue >= EMPTY_RX_REFILL) {
counter_u64_add(rx_ring->rx_stats.empty_rx_ring,
1);
device_printf(adapter->pdev,
"trigger refill for ring %d\n", i);
taskqueue_enqueue(rx_ring->que->cleanup_tq,
&rx_ring->que->cleanup_task);
rx_ring->empty_rx_queue = 0;
}
} else {
rx_ring->empty_rx_queue = 0;
}
}
}
static void ena_update_hints(struct ena_adapter *adapter,
struct ena_admin_ena_hw_hints *hints)
{
struct ena_com_dev *ena_dev = adapter->ena_dev;
if (hints->admin_completion_tx_timeout)
ena_dev->admin_queue.completion_timeout =
hints->admin_completion_tx_timeout * 1000;
if (hints->mmio_read_timeout)
/* convert to usec */
ena_dev->mmio_read.reg_read_to =
hints->mmio_read_timeout * 1000;
if (hints->missed_tx_completion_count_threshold_to_reset)
adapter->missing_tx_threshold =
hints->missed_tx_completion_count_threshold_to_reset;
if (hints->missing_tx_completion_timeout) {
if (hints->missing_tx_completion_timeout ==
ENA_HW_HINTS_NO_TIMEOUT)
adapter->missing_tx_timeout = ENA_HW_HINTS_NO_TIMEOUT;
else
adapter->missing_tx_timeout =
SBT_1MS * hints->missing_tx_completion_timeout;
}
if (hints->driver_watchdog_timeout) {
if (hints->driver_watchdog_timeout == ENA_HW_HINTS_NO_TIMEOUT)
adapter->keep_alive_timeout = ENA_HW_HINTS_NO_TIMEOUT;
else
adapter->keep_alive_timeout =
SBT_1MS * hints->driver_watchdog_timeout;
}
}
/**
* ena_copy_eni_metrics - Get and copy ENI metrics from the HW.
* @adapter: ENA device adapter
*
* Returns 0 on success, EOPNOTSUPP if current HW doesn't support those metrics
* and other error codes on failure.
*
* This function can possibly cause a race with other calls to the admin queue.
* Because of that, the caller should either lock this function or make sure
* that there is no race in the current context.
*/
static int
ena_copy_eni_metrics(struct ena_adapter *adapter)
{
static bool print_once = true;
int rc;
rc = ena_com_get_eni_stats(adapter->ena_dev, &adapter->eni_metrics);
if (rc != 0) {
if (rc == ENA_COM_UNSUPPORTED) {
if (print_once) {
device_printf(adapter->pdev,
"Retrieving ENI metrics is not supported.\n");
print_once = false;
} else {
ena_trace(NULL, ENA_DBG,
"Retrieving ENI metrics is not supported.\n");
}
} else {
device_printf(adapter->pdev,
"Failed to get ENI metrics: %d\n", rc);
}
}
return (rc);
}
static void
ena_timer_service(void *data)
{
struct ena_adapter *adapter = (struct ena_adapter *)data;
struct ena_admin_host_info *host_info =
adapter->ena_dev->host_attr.host_info;
check_for_missing_keep_alive(adapter);
check_for_admin_com_state(adapter);
check_for_missing_completions(adapter);
check_for_empty_rx_ring(adapter);
/*
* User controller update of the ENI metrics.
* If the delay was set to 0, then the stats shouldn't be updated at
* all.
* Otherwise, wait 'eni_metrics_sample_interval' seconds, before
* updating stats.
* As timer service is executed every second, it's enough to increment
* appropriate counter each time the timer service is executed.
*/
if ((adapter->eni_metrics_sample_interval != 0) &&
(++adapter->eni_metrics_sample_interval_cnt >=
adapter->eni_metrics_sample_interval)) {
/*
* There is no race with other admin queue calls, as:
* - Timer service runs after interface is up, so all
* configuration calls to the admin queue are finished.
* - After interface is up, the driver doesn't use (at least
* for now) other functions writing to the admin queue.
*
* It may change in the future, so in that situation, the lock
* will be needed. ENA_LOCK_*() cannot be used for that purpose,
* as callout ena_timer_service is protected by them. It could
* lead to the deadlock if callout_drain() would hold the lock
* before ena_copy_eni_metrics() was executed. It's advised to
* use separate lock in that situation which will be used only
* for the admin queue.
*/
(void)ena_copy_eni_metrics(adapter);
adapter->eni_metrics_sample_interval_cnt = 0;
}
if (host_info != NULL)
ena_update_host_info(host_info, adapter->ifp);
if (unlikely(ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter))) {
device_printf(adapter->pdev, "Trigger reset is on\n");
taskqueue_enqueue(adapter->reset_tq, &adapter->reset_task);
return;
}
/*
* Schedule another timeout one second from now.
*/
callout_schedule_sbt(&adapter->timer_service, SBT_1S, SBT_1S, 0);
}
void
ena_destroy_device(struct ena_adapter *adapter, bool graceful)
{
if_t ifp = adapter->ifp;
struct ena_com_dev *ena_dev = adapter->ena_dev;
bool dev_up;
if (!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))
return;
if_link_state_change(ifp, LINK_STATE_DOWN);
callout_drain(&adapter->timer_service);
dev_up = ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter);
if (dev_up)
ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEV_UP_BEFORE_RESET, adapter);
if (!graceful)
ena_com_set_admin_running_state(ena_dev, false);
if (ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
ena_down(adapter);
/*
* Stop the device from sending AENQ events (if the device was up, and
* the trigger reset was on, ena_down already performs device reset)
*/
if (!(ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter) && dev_up))
ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
ena_free_mgmnt_irq(adapter);
ena_disable_msix(adapter);
/*
* IO rings resources should be freed because `ena_restore_device()`
* calls (not directly) `ena_enable_msix()`, which re-allocates MSIX
* vectors. The amount of MSIX vectors after destroy-restore may be
* different than before. Therefore, IO rings resources should be
* established from scratch each time.
*/
ena_free_all_io_rings_resources(adapter);
ena_com_abort_admin_commands(ena_dev);
ena_com_wait_for_abort_completion(ena_dev);
ena_com_admin_destroy(ena_dev);
ena_com_mmio_reg_read_request_destroy(ena_dev);
adapter->reset_reason = ENA_REGS_RESET_NORMAL;
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_TRIGGER_RESET, adapter);
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_DEVICE_RUNNING, adapter);
}
static int
ena_device_validate_params(struct ena_adapter *adapter,
struct ena_com_dev_get_features_ctx *get_feat_ctx)
{
if (memcmp(get_feat_ctx->dev_attr.mac_addr, adapter->mac_addr,
ETHER_ADDR_LEN) != 0) {
device_printf(adapter->pdev,
"Error, mac address are different\n");
return (EINVAL);
}
if (get_feat_ctx->dev_attr.max_mtu < if_getmtu(adapter->ifp)) {
device_printf(adapter->pdev,
"Error, device max mtu is smaller than ifp MTU\n");
return (EINVAL);
}
return 0;
}
int
ena_restore_device(struct ena_adapter *adapter)
{
struct ena_com_dev_get_features_ctx get_feat_ctx;
struct ena_com_dev *ena_dev = adapter->ena_dev;
if_t ifp = adapter->ifp;
device_t dev = adapter->pdev;
int wd_active;
int rc;
ENA_FLAG_SET_ATOMIC(ENA_FLAG_ONGOING_RESET, adapter);
rc = ena_device_init(adapter, dev, &get_feat_ctx, &wd_active);
if (rc != 0) {
device_printf(dev, "Cannot initialize device\n");
goto err;
}
/*
* Only enable WD if it was enabled before reset, so it won't override
* value set by the user by the sysctl.
*/
if (adapter->wd_active != 0)
adapter->wd_active = wd_active;
rc = ena_device_validate_params(adapter, &get_feat_ctx);
if (rc != 0) {
device_printf(dev, "Validation of device parameters failed\n");
goto err_device_destroy;
}
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_ONGOING_RESET, adapter);
/* Make sure we don't have a race with AENQ Links state handler */
if (ENA_FLAG_ISSET(ENA_FLAG_LINK_UP, adapter))
if_link_state_change(ifp, LINK_STATE_UP);
rc = ena_enable_msix_and_set_admin_interrupts(adapter);
if (rc != 0) {
device_printf(dev, "Enable MSI-X failed\n");
goto err_device_destroy;
}
/*
* Effective value of used MSIX vectors should be the same as before
* `ena_destroy_device()`, if possible, or closest to it if less vectors
* are available.
*/
if ((adapter->msix_vecs - ENA_ADMIN_MSIX_VEC) < adapter->num_io_queues)
adapter->num_io_queues =
adapter->msix_vecs - ENA_ADMIN_MSIX_VEC;
/* Re-initialize rings basic information */
ena_init_io_rings(adapter);
/* If the interface was up before the reset bring it up */
if (ENA_FLAG_ISSET(ENA_FLAG_DEV_UP_BEFORE_RESET, adapter)) {
rc = ena_up(adapter);
if (rc != 0) {
device_printf(dev, "Failed to create I/O queues\n");
goto err_disable_msix;
}
}
/* Indicate that device is running again and ready to work */
ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEVICE_RUNNING, adapter);
if (ENA_FLAG_ISSET(ENA_FLAG_DEV_UP_BEFORE_RESET, adapter)) {
/*
* As the AENQ handlers weren't executed during reset because
* the flag ENA_FLAG_DEVICE_RUNNING was turned off, the
* timestamp must be updated again That will prevent next reset
* caused by missing keep alive.
*/
adapter->keep_alive_timestamp = getsbinuptime();
callout_reset_sbt(&adapter->timer_service, SBT_1S, SBT_1S,
ena_timer_service, (void *)adapter, 0);
}
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_DEV_UP_BEFORE_RESET, adapter);
device_printf(dev,
"Device reset completed successfully, Driver info: %s\n", ena_version);
return (rc);
err_disable_msix:
ena_free_mgmnt_irq(adapter);
ena_disable_msix(adapter);
err_device_destroy:
ena_com_abort_admin_commands(ena_dev);
ena_com_wait_for_abort_completion(ena_dev);
ena_com_admin_destroy(ena_dev);
ena_com_dev_reset(ena_dev, ENA_REGS_RESET_DRIVER_INVALID_STATE);
ena_com_mmio_reg_read_request_destroy(ena_dev);
err:
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_DEVICE_RUNNING, adapter);
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_ONGOING_RESET, adapter);
device_printf(dev, "Reset attempt failed. Can not reset the device\n");
return (rc);
}
static void
ena_reset_task(void *arg, int pending)
{
struct ena_adapter *adapter = (struct ena_adapter *)arg;
if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter))) {
device_printf(adapter->pdev,
"device reset scheduled but trigger_reset is off\n");
return;
}
ENA_LOCK_LOCK(adapter);
ena_destroy_device(adapter, false);
ena_restore_device(adapter);
ENA_LOCK_UNLOCK(adapter);
}
/**
* ena_attach - Device Initialization Routine
* @pdev: device information struct
*
* Returns 0 on success, otherwise on failure.
*
* ena_attach initializes an adapter identified by a device structure.
* The OS initialization, configuring of the adapter private structure,
* and a hardware reset occur.
**/
static int
ena_attach(device_t pdev)
{
struct ena_com_dev_get_features_ctx get_feat_ctx;
struct ena_llq_configurations llq_config;
struct ena_calc_queue_size_ctx calc_queue_ctx = { 0 };
static int version_printed;
struct ena_adapter *adapter;
struct ena_com_dev *ena_dev = NULL;
uint32_t max_num_io_queues;
int msix_rid;
int rid, rc;
adapter = device_get_softc(pdev);
adapter->pdev = pdev;
ENA_LOCK_INIT(adapter);
/*
* Set up the timer service - driver is responsible for avoiding
* concurrency, as the callout won't be using any locking inside.
*/
callout_init(&adapter->timer_service, true);
adapter->keep_alive_timeout = DEFAULT_KEEP_ALIVE_TO;
adapter->missing_tx_timeout = DEFAULT_TX_CMP_TO;
adapter->missing_tx_max_queues = DEFAULT_TX_MONITORED_QUEUES;
adapter->missing_tx_threshold = DEFAULT_TX_CMP_THRESHOLD;
if (version_printed++ == 0)
device_printf(pdev, "%s\n", ena_version);
/* Allocate memory for ena_dev structure */
ena_dev = malloc(sizeof(struct ena_com_dev), M_DEVBUF,
M_WAITOK | M_ZERO);
adapter->ena_dev = ena_dev;
ena_dev->dmadev = pdev;
rid = PCIR_BAR(ENA_REG_BAR);
adapter->memory = NULL;
adapter->registers = bus_alloc_resource_any(pdev, SYS_RES_MEMORY,
&rid, RF_ACTIVE);
if (unlikely(adapter->registers == NULL)) {
device_printf(pdev,
"unable to allocate bus resource: registers!\n");
rc = ENOMEM;
goto err_dev_free;
}
/* MSIx vector table may reside on BAR0 with registers or on BAR1. */
msix_rid = pci_msix_table_bar(pdev);
if (msix_rid != rid) {
adapter->msix = bus_alloc_resource_any(pdev, SYS_RES_MEMORY,
&msix_rid, RF_ACTIVE);
if (unlikely(adapter->msix == NULL)) {
device_printf(pdev,
"unable to allocate bus resource: msix!\n");
rc = ENOMEM;
goto err_pci_free;
}
adapter->msix_rid = msix_rid;
}
ena_dev->bus = malloc(sizeof(struct ena_bus), M_DEVBUF,
M_WAITOK | M_ZERO);
/* Store register resources */
((struct ena_bus*)(ena_dev->bus))->reg_bar_t =
rman_get_bustag(adapter->registers);
((struct ena_bus*)(ena_dev->bus))->reg_bar_h =
rman_get_bushandle(adapter->registers);
if (unlikely(((struct ena_bus*)(ena_dev->bus))->reg_bar_h == 0)) {
device_printf(pdev, "failed to pmap registers bar\n");
rc = ENXIO;
goto err_bus_free;
}
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
/* Initially clear all the flags */
ENA_FLAG_ZERO(adapter);
/* Device initialization */
rc = ena_device_init(adapter, pdev, &get_feat_ctx, &adapter->wd_active);
if (unlikely(rc != 0)) {
device_printf(pdev, "ENA device init failed! (err: %d)\n", rc);
rc = ENXIO;
goto err_bus_free;
}
set_default_llq_configurations(&llq_config);
rc = ena_set_queues_placement_policy(pdev, ena_dev, &get_feat_ctx.llq,
&llq_config);
if (unlikely(rc != 0)) {
device_printf(pdev, "failed to set placement policy\n");
goto err_com_free;
}
if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
adapter->disable_meta_caching =
!!(get_feat_ctx.llq.accel_mode.u.get.supported_flags &
BIT(ENA_ADMIN_DISABLE_META_CACHING));
adapter->keep_alive_timestamp = getsbinuptime();
adapter->tx_offload_cap = get_feat_ctx.offload.tx;
memcpy(adapter->mac_addr, get_feat_ctx.dev_attr.mac_addr,
ETHER_ADDR_LEN);
calc_queue_ctx.pdev = pdev;
calc_queue_ctx.ena_dev = ena_dev;
calc_queue_ctx.get_feat_ctx = &get_feat_ctx;
/* Calculate initial and maximum IO queue number and size */
max_num_io_queues = ena_calc_max_io_queue_num(pdev, ena_dev,
&get_feat_ctx);
rc = ena_calc_io_queue_size(&calc_queue_ctx);
if (unlikely((rc != 0) || (max_num_io_queues <= 0))) {
rc = EFAULT;
goto err_com_free;
}
adapter->requested_tx_ring_size = calc_queue_ctx.tx_queue_size;
adapter->requested_rx_ring_size = calc_queue_ctx.rx_queue_size;
adapter->max_tx_ring_size = calc_queue_ctx.max_tx_queue_size;
adapter->max_rx_ring_size = calc_queue_ctx.max_rx_queue_size;
adapter->max_tx_sgl_size = calc_queue_ctx.max_tx_sgl_size;
adapter->max_rx_sgl_size = calc_queue_ctx.max_rx_sgl_size;
adapter->max_num_io_queues = max_num_io_queues;
adapter->buf_ring_size = ENA_DEFAULT_BUF_RING_SIZE;
adapter->max_mtu = get_feat_ctx.dev_attr.max_mtu;
adapter->reset_reason = ENA_REGS_RESET_NORMAL;
/* set up dma tags for rx and tx buffers */
rc = ena_setup_tx_dma_tag(adapter);
if (unlikely(rc != 0)) {
device_printf(pdev, "Failed to create TX DMA tag\n");
goto err_com_free;
}
rc = ena_setup_rx_dma_tag(adapter);
if (unlikely(rc != 0)) {
device_printf(pdev, "Failed to create RX DMA tag\n");
goto err_tx_tag_free;
}
/*
* The amount of requested MSIX vectors is equal to
* adapter::max_num_io_queues (see `ena_enable_msix()`), plus a constant
* number of admin queue interrupts. The former is initially determined
* by HW capabilities (see `ena_calc_max_io_queue_num())` but may not be
* achieved if there are not enough system resources. By default, the
* number of effectively used IO queues is the same but later on it can
* be limited by the user using sysctl interface.
*/
rc = ena_enable_msix_and_set_admin_interrupts(adapter);
if (unlikely(rc != 0)) {
device_printf(pdev,
"Failed to enable and set the admin interrupts\n");
goto err_io_free;
}
/* By default all of allocated MSIX vectors are actively used */
adapter->num_io_queues = adapter->msix_vecs - ENA_ADMIN_MSIX_VEC;
/* initialize rings basic information */
ena_init_io_rings(adapter);
/* setup network interface */
rc = ena_setup_ifnet(pdev, adapter, &get_feat_ctx);
if (unlikely(rc != 0)) {
device_printf(pdev, "Error with network interface setup\n");
goto err_msix_free;
}
/* Initialize reset task queue */
TASK_INIT(&adapter->reset_task, 0, ena_reset_task, adapter);
adapter->reset_tq = taskqueue_create("ena_reset_enqueue",
M_WAITOK | M_ZERO, taskqueue_thread_enqueue, &adapter->reset_tq);
taskqueue_start_threads(&adapter->reset_tq, 1, PI_NET,
"%s rstq", device_get_nameunit(adapter->pdev));
/* Initialize statistics */
ena_alloc_counters((counter_u64_t *)&adapter->dev_stats,
sizeof(struct ena_stats_dev));
ena_alloc_counters((counter_u64_t *)&adapter->hw_stats,
sizeof(struct ena_hw_stats));
ena_sysctl_add_nodes(adapter);
#ifdef DEV_NETMAP
rc = ena_netmap_attach(adapter);
if (rc != 0) {
device_printf(pdev, "netmap attach failed: %d\n", rc);
goto err_detach;
}
#endif /* DEV_NETMAP */
/* Tell the stack that the interface is not active */
if_setdrvflagbits(adapter->ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEVICE_RUNNING, adapter);
return (0);
#ifdef DEV_NETMAP
err_detach:
ether_ifdetach(adapter->ifp);
#endif /* DEV_NETMAP */
err_msix_free:
ena_com_dev_reset(adapter->ena_dev, ENA_REGS_RESET_INIT_ERR);
ena_free_mgmnt_irq(adapter);
ena_disable_msix(adapter);
err_io_free:
ena_free_all_io_rings_resources(adapter);
ena_free_rx_dma_tag(adapter);
err_tx_tag_free:
ena_free_tx_dma_tag(adapter);
err_com_free:
ena_com_admin_destroy(ena_dev);
ena_com_delete_host_info(ena_dev);
ena_com_mmio_reg_read_request_destroy(ena_dev);
err_bus_free:
free(ena_dev->bus, M_DEVBUF);
err_pci_free:
ena_free_pci_resources(adapter);
err_dev_free:
free(ena_dev, M_DEVBUF);
return (rc);
}
/**
* ena_detach - Device Removal Routine
* @pdev: device information struct
*
* ena_detach is called by the device subsystem to alert the driver
* that it should release a PCI device.
**/
static int
ena_detach(device_t pdev)
{
struct ena_adapter *adapter = device_get_softc(pdev);
struct ena_com_dev *ena_dev = adapter->ena_dev;
int rc;
/* Make sure VLANS are not using driver */
if (adapter->ifp->if_vlantrunk != NULL) {
device_printf(adapter->pdev ,"VLAN is in use, detach first\n");
return (EBUSY);
}
ether_ifdetach(adapter->ifp);
/* Stop timer service */
ENA_LOCK_LOCK(adapter);
callout_drain(&adapter->timer_service);
ENA_LOCK_UNLOCK(adapter);
/* Release reset task */
while (taskqueue_cancel(adapter->reset_tq, &adapter->reset_task, NULL))
taskqueue_drain(adapter->reset_tq, &adapter->reset_task);
taskqueue_free(adapter->reset_tq);
ENA_LOCK_LOCK(adapter);
ena_down(adapter);
ena_destroy_device(adapter, true);
ENA_LOCK_UNLOCK(adapter);
#ifdef DEV_NETMAP
netmap_detach(adapter->ifp);
#endif /* DEV_NETMAP */
ena_free_counters((counter_u64_t *)&adapter->hw_stats,
sizeof(struct ena_hw_stats));
ena_free_counters((counter_u64_t *)&adapter->dev_stats,
sizeof(struct ena_stats_dev));
rc = ena_free_rx_dma_tag(adapter);
if (unlikely(rc != 0))
device_printf(adapter->pdev,
"Unmapped RX DMA tag associations\n");
rc = ena_free_tx_dma_tag(adapter);
if (unlikely(rc != 0))
device_printf(adapter->pdev,
"Unmapped TX DMA tag associations\n");
ena_free_irqs(adapter);
ena_free_pci_resources(adapter);
if (likely(ENA_FLAG_ISSET(ENA_FLAG_RSS_ACTIVE, adapter)))
ena_com_rss_destroy(ena_dev);
ena_com_delete_host_info(ena_dev);
ENA_LOCK_DESTROY(adapter);
if_free(adapter->ifp);
if (ena_dev->bus != NULL)
free(ena_dev->bus, M_DEVBUF);
if (ena_dev != NULL)
free(ena_dev, M_DEVBUF);
return (bus_generic_detach(pdev));
}
/******************************************************************************
******************************** AENQ Handlers *******************************
*****************************************************************************/
/**
* ena_update_on_link_change:
* Notify the network interface about the change in link status
**/
static void
ena_update_on_link_change(void *adapter_data,
struct ena_admin_aenq_entry *aenq_e)
{
struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
struct ena_admin_aenq_link_change_desc *aenq_desc;
int status;
if_t ifp;
aenq_desc = (struct ena_admin_aenq_link_change_desc *)aenq_e;
ifp = adapter->ifp;
status = aenq_desc->flags &
ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK;
if (status != 0) {
device_printf(adapter->pdev, "link is UP\n");
ENA_FLAG_SET_ATOMIC(ENA_FLAG_LINK_UP, adapter);
if (!ENA_FLAG_ISSET(ENA_FLAG_ONGOING_RESET, adapter))
if_link_state_change(ifp, LINK_STATE_UP);
} else {
device_printf(adapter->pdev, "link is DOWN\n");
if_link_state_change(ifp, LINK_STATE_DOWN);
ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_LINK_UP, adapter);
}
}
static void ena_notification(void *adapter_data,
struct ena_admin_aenq_entry *aenq_e)
{
struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
struct ena_admin_ena_hw_hints *hints;
ENA_WARN(NULL, aenq_e->aenq_common_desc.group != ENA_ADMIN_NOTIFICATION,
"Invalid group(%x) expected %x\n", aenq_e->aenq_common_desc.group,
ENA_ADMIN_NOTIFICATION);
switch (aenq_e->aenq_common_desc.syndrome) {
case ENA_ADMIN_UPDATE_HINTS:
hints =
(struct ena_admin_ena_hw_hints *)(&aenq_e->inline_data_w4);
ena_update_hints(adapter, hints);
break;
default:
device_printf(adapter->pdev,
"Invalid aenq notification link state %d\n",
aenq_e->aenq_common_desc.syndrome);
}
}
/**
* This handler will called for unknown event group or unimplemented handlers
**/
static void
unimplemented_aenq_handler(void *adapter_data,
struct ena_admin_aenq_entry *aenq_e)
{
struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
device_printf(adapter->pdev,
"Unknown event was received or event with unimplemented handler\n");
}
static struct ena_aenq_handlers aenq_handlers = {
.handlers = {
[ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
[ENA_ADMIN_NOTIFICATION] = ena_notification,
[ENA_ADMIN_KEEP_ALIVE] = ena_keep_alive_wd,
},
.unimplemented_handler = unimplemented_aenq_handler
};
/*********************************************************************
* FreeBSD Device Interface Entry Points
*********************************************************************/
static device_method_t ena_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ena_probe),
DEVMETHOD(device_attach, ena_attach),
DEVMETHOD(device_detach, ena_detach),
DEVMETHOD_END
};
static driver_t ena_driver = {
"ena", ena_methods, sizeof(struct ena_adapter),
};
devclass_t ena_devclass;
DRIVER_MODULE(ena, pci, ena_driver, ena_devclass, 0, 0);
MODULE_PNP_INFO("U16:vendor;U16:device", pci, ena, ena_vendor_info_array,
nitems(ena_vendor_info_array) - 1);
MODULE_DEPEND(ena, pci, 1, 1, 1);
MODULE_DEPEND(ena, ether, 1, 1, 1);
#ifdef DEV_NETMAP
MODULE_DEPEND(ena, netmap, 1, 1, 1);
#endif /* DEV_NETMAP */
/*********************************************************************/
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