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a273973175
freebsd/sys/dev/ena/ena.c
Marcin Wojtas 5727f16270 Fix setting AENQ group in ENA driver 
With the current state of the AENQ handlers in the ENA driver, only
implemented handlers should be indicated.

Submitted by: Michal Krawczyk <mk@semihalf.com>
Reviewed by: byenduri_gmail.com
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Differential Revision: https://reviews.freebsd.org/D12872
2017-11-09 13:38:17 +00:00

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102 KiB
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/*-
* BSD LICENSE
*
* Copyright (c) 2015-2017 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 <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/rss_config.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <netinet/in_rss.h>
#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 "ena.h"
#include "ena_sysctl.h"
/*********************************************************
* Function prototypes
*********************************************************/
static int ena_probe(device_t);
static void ena_intr_msix_mgmnt(void *);
static int ena_allocate_pci_resources(struct ena_adapter*);
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(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 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 inline int validate_rx_req_id(struct ena_ring *, uint16_t);
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 int ena_refill_rx_bufs(struct ena_ring *, uint32_t);
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_tx_cleanup(struct ena_ring *);
static void ena_deferred_rx_cleanup(void *, int);
static int ena_rx_cleanup(struct ena_ring *);
static inline int validate_tx_req_id(struct ena_ring *, uint16_t);
static void ena_rx_hash_mbuf(struct ena_ring *, struct ena_com_rx_ctx *,
struct mbuf *);
static struct mbuf* ena_rx_mbuf(struct ena_ring *, struct ena_com_rx_buf_info *,
struct ena_com_rx_ctx *, uint16_t *);
static inline void ena_rx_checksum(struct ena_ring *, struct ena_com_rx_ctx *,
struct mbuf *);
static void ena_handle_msix(void *);
static int ena_enable_msix(struct ena_adapter *);
static void ena_setup_mgmnt_intr(struct ena_adapter *);
static void 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 int ena_up(struct ena_adapter *);
static void ena_down(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 void ena_tx_csum(struct ena_com_tx_ctx *, struct mbuf *);
static int ena_check_and_collapse_mbuf(struct ena_ring *tx_ring,
struct mbuf **mbuf);
static int ena_xmit_mbuf(struct ena_ring *, struct mbuf **);
static void ena_start_xmit(struct ena_ring *);
static int ena_mq_start(if_t, struct mbuf *);
static void ena_deferred_mq_start(void *, int);
static void ena_qflush(if_t);
static int ena_calc_io_queue_num(struct ena_adapter *,
struct ena_com_dev_get_features_ctx *);
static int ena_calc_queue_size(struct ena_adapter *, uint16_t *,
uint16_t *, struct ena_com_dev_get_features_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 *);
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 *,
int);
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 void ena_timer_service(void *);
static char ena_version[] = DEVICE_NAME DRV_MODULE_NAME " v" DRV_MODULE_VERSION;
static SYSCTL_NODE(_hw, OID_AUTO, ena, CTLFLAG_RD, 0, "ENA driver parameters");
/*
* Tuneable number of buffers in the buf-ring (drbr)
*/
static int ena_buf_ring_size = 4096;
SYSCTL_INT(_hw_ena, OID_AUTO, buf_ring_size, CTLFLAG_RWTUN,
&ena_buf_ring_size, 0, "Size of the bufring");
/*
* Logging level for changing verbosity of the output
*/
int ena_log_level = ENA_ALERT | ENA_WARNING;
SYSCTL_INT(_hw_ena, OID_AUTO, log_level, CTLFLAG_RWTUN,
&ena_log_level, 0, "Logging level indicating verbosity of the logs");
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_LLQ_PF, 0},
{ PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_VF, 0},
{ PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_LLQ_VF, 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)
{
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 */
8, 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(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(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(ENA_ALERT, ": bus_dmamap_load failed: %d\n", error);
goto fail_map_load;
}
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;
return (error);
}
static int
ena_allocate_pci_resources(struct ena_adapter* adapter)
{
device_t pdev = adapter->pdev;
int rid;
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");
return (ENXIO);
}
return (0);
}
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);
}
}
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(ENA_DBG, "vendor=%x device=%x ",
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(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;
}
static void
ena_init_io_rings(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_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->ring_size = adapter->tx_ring_size;
txr->tx_max_header_size = ena_dev->tx_max_header_size;
txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
txr->smoothed_interval =
ena_com_get_nonadaptive_moderation_interval_tx(ena_dev);
/* Allocate a buf ring */
txr->br = buf_ring_alloc(ena_buf_ring_size, M_DEVBUF,
M_WAITOK, &txr->ring_mtx);
/* Alloc TX statistics. */
ena_alloc_counters((counter_u64_t *)&txr->tx_stats,
sizeof(txr->tx_stats));
/* RX specific ring state */
rxr->ring_size = adapter->rx_ring_size;
rxr->smoothed_interval =
ena_com_get_nonadaptive_moderation_interval_rx(ena_dev);
/* Alloc 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);
mtx_init(&rxr->ring_mtx, rxr->mtx_name, NULL, MTX_DEF);
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;
}
}
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);
mtx_destroy(&rxr->ring_mtx);
}
static void
ena_free_all_io_rings_resources(struct ena_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_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 */
MJUM16BYTES, /* maxsize */
adapter->max_rx_sgl_size, /* nsegments */
MJUM16BYTES, /* 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);
}
/**
* 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 RSS
cpuset_t cpu_mask;
#endif
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;
/* 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;
/* 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].map);
if (unlikely(err != 0)) {
ena_trace(ENA_ALERT,
"Unable to create Tx DMA map for buffer %d\n", i);
goto err_buf_info_unmap;
}
}
/* 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(ENA_ALERT,
"Unable to create taskqueue for enqueue task\n");
i = tx_ring->ring_size;
goto err_buf_info_unmap;
}
/* RSS set cpu for thread */
#ifdef RSS
CPU_SETOF(que->cpu, &cpu_mask);
taskqueue_start_threads_cpuset(&tx_ring->enqueue_tq, 1, PI_NET,
&cpu_mask, "%s tx_ring enq (bucket %d)",
device_get_nameunit(adapter->pdev), que->cpu);
#else /* RSS */
taskqueue_start_threads(&tx_ring->enqueue_tq, 1, PI_NET,
"%s txeq %d", device_get_nameunit(adapter->pdev), que->cpu);
#endif /* RSS */
return (0);
err_buf_info_unmap:
while (i--) {
bus_dmamap_destroy(adapter->tx_buf_tag,
tx_ring->tx_buffer_info[i].map);
}
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];
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++) {
m_freem(tx_ring->tx_buffer_info[i].mbuf);
tx_ring->tx_buffer_info[i].mbuf = NULL;
bus_dmamap_unload(adapter->tx_buf_tag,
tx_ring->tx_buffer_info[i].map);
bus_dmamap_destroy(adapter->tx_buf_tag,
tx_ring->tx_buffer_info[i].map);
}
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;
}
/**
* 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_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_queues; i++)
ena_free_tx_resources(adapter, i);
}
static inline int
validate_rx_req_id(struct ena_ring *rx_ring, uint16_t req_id)
{
if (likely(req_id < rx_ring->ring_size))
return (0);
device_printf(rx_ring->adapter->pdev, "Invalid rx req_id: %hu\n",
req_id);
counter_u64_add(rx_ring->rx_stats.bad_req_id, 1);
/* Trigger device reset */
rx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_RX_REQ_ID;
rx_ring->adapter->trigger_reset = true;
return (EFAULT);
}
/**
* 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;
#ifdef RSS
cpuset_t cpu_mask;
#endif
size = sizeof(struct ena_rx_buffer) * rx_ring->ring_size;
/*
* 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(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(ENA_INFO,
"RX Soft LRO[%d] Initialized\n", qid);
rx_ring->lro.ifp = adapter->ifp;
}
}
/* Allocate taskqueues */
TASK_INIT(&rx_ring->cmpl_task, 0, ena_deferred_rx_cleanup, rx_ring);
rx_ring->cmpl_tq = taskqueue_create_fast("ena RX completion", M_WAITOK,
taskqueue_thread_enqueue, &rx_ring->cmpl_tq);
/* RSS set cpu for thread */
#ifdef RSS
CPU_SETOF(que->cpu, &cpu_mask);
taskqueue_start_threads_cpuset(&rx_ring->cmpl_tq, 1, PI_NET, &cpu_mask,
"%s rx_ring cmpl (bucket %d)",
device_get_nameunit(adapter->pdev), que->cpu);
#else
taskqueue_start_threads(&rx_ring->cmpl_tq, 1, PI_NET,
"%s rx_ring cmpl %d", device_get_nameunit(adapter->pdev), que->cpu);
#endif
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];
while (taskqueue_cancel(rx_ring->cmpl_tq, &rx_ring->cmpl_task, NULL) != 0)
taskqueue_drain(rx_ring->cmpl_tq, &rx_ring->cmpl_task);
taskqueue_free(rx_ring->cmpl_tq);
/* Free buffer DMA maps, */
for (int i = 0; i < rx_ring->ring_size; i++) {
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_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_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, MJUM16BYTES);
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 = MJUM16BYTES;
}
/* Set mbuf length*/
rx_info->mbuf->m_pkthdr.len = rx_info->mbuf->m_len = mlen;
/* Map packets for DMA */
ena_trace(ENA_DBG | ENA_RSC | ENA_RXPTH,
"Using tag %p for buffers' DMA mapping, mbuf %p len: %d",
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(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(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(ENA_WARNING, "Trying to free unallocated buffer\n");
return;
}
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
**/
static 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(ENA_DBG | ENA_RXPTH | ENA_RSC, "refill qid: %d",
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(ENA_DBG | ENA_RXPTH | ENA_RSC,
"RX buffer - next to use: %d", next_to_use);
req_id = rx_ring->free_rx_ids[next_to_use];
rc = validate_rx_req_id(rx_ring, req_id);
if (unlikely(rc != 0))
break;
rx_info = &rx_ring->rx_buffer_info[req_id];
rc = ena_alloc_rx_mbuf(adapter, rx_ring, rx_info);
if (unlikely(rc != 0)) {
ena_trace(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(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(ENA_WARNING,
"refilled rx qid %d with only %d mbufs (from %d)\n",
rx_ring->qid, i, num);
}
if (likely(i != 0)) {
wmb();
ena_com_write_sq_doorbell(rx_ring->ena_com_io_sq);
}
rx_ring->next_to_use = next_to_use;
return (i);
}
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);
}
}
/**
* 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_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(ENA_WARNING, "refilling Queue %d failed. "
"Allocated %d buffers from: %d\n", i, rc, bufs_num);
}
}
static void
ena_free_all_rx_bufs(struct ena_adapter *adapter)
{
int i;
for (i = 0; i < adapter->num_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",
qid, i);
print_once = false;
} else {
ena_trace(ENA_DBG,
"free uncompleted tx mbuf qid %d idx 0x%x",
qid, i);
}
bus_dmamap_unload(adapter->tx_buf_tag, tx_info->map);
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_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_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_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)
{
ena_destroy_all_tx_queues(adapter);
ena_destroy_all_rx_queues(adapter);
}
static inline int
validate_tx_req_id(struct ena_ring *tx_ring, uint16_t req_id)
{
struct ena_adapter *adapter = tx_ring->adapter;
struct ena_tx_buffer *tx_info = NULL;
if (likely(req_id < tx_ring->ring_size)) {
tx_info = &tx_ring->tx_buffer_info[req_id];
if (tx_info->mbuf != NULL)
return (0);
}
if (tx_info->mbuf == NULL)
device_printf(adapter->pdev,
"tx_info doesn't have valid mbuf\n");
else
device_printf(adapter->pdev, "Invalid req_id: %hu\n", req_id);
counter_u64_add(tx_ring->tx_stats.bad_req_id, 1);
return (EFAULT);
}
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;
uint16_t ena_qid;
uint32_t msix_vector;
int rc, i;
/* Create TX queues */
for (i = 0; i < adapter->num_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->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_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->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;
}
}
return (0);
err_rx:
while (i--)
ena_com_destroy_io_queue(ena_dev, ENA_IO_RXQ_IDX(i));
i = adapter->num_queues;
err_tx:
while (i--)
ena_com_destroy_io_queue(ena_dev, ENA_IO_TXQ_IDX(i));
return (ENXIO);
}
/**
* ena_tx_cleanup - clear sent packets and corresponding descriptors
* @tx_ring: ring for which we want to clean packets
*
* Once packets are sent, we ask the device in a loop for no longer used
* descriptors. We find the related mbuf chain in a map (index in an array)
* and free it, then update ring state.
* This is performed in "endless" loop, updating ring pointers every
* TX_COMMIT. The first check of free descriptor is performed before the actual
* loop, then repeated at the loop end.
**/
static int
ena_tx_cleanup(struct ena_ring *tx_ring)
{
struct ena_adapter *adapter;
struct ena_com_io_cq* io_cq;
uint16_t next_to_clean;
uint16_t req_id;
uint16_t ena_qid;
unsigned int total_done = 0;
int rc;
int commit = TX_COMMIT;
int budget = TX_BUDGET;
int work_done;
adapter = tx_ring->que->adapter;
ena_qid = ENA_IO_TXQ_IDX(tx_ring->que->id);
io_cq = &adapter->ena_dev->io_cq_queues[ena_qid];
next_to_clean = tx_ring->next_to_clean;
do {
struct ena_tx_buffer *tx_info;
struct mbuf *mbuf;
rc = ena_com_tx_comp_req_id_get(io_cq, &req_id);
if (unlikely(rc != 0))
break;
rc = validate_tx_req_id(tx_ring, req_id);
if (unlikely(rc != 0))
break;
tx_info = &tx_ring->tx_buffer_info[req_id];
mbuf = tx_info->mbuf;
tx_info->mbuf = NULL;
bintime_clear(&tx_info->timestamp);
if (likely(tx_info->num_of_bufs != 0)) {
/* Map is no longer required */
bus_dmamap_unload(adapter->tx_buf_tag, tx_info->map);
}
ena_trace(ENA_DBG | ENA_TXPTH, "tx: q %d mbuf %p completed",
tx_ring->qid, mbuf);
m_freem(mbuf);
total_done += tx_info->tx_descs;
tx_ring->free_tx_ids[next_to_clean] = req_id;
next_to_clean = ENA_TX_RING_IDX_NEXT(next_to_clean,
tx_ring->ring_size);
if (unlikely(--commit == 0)) {
commit = TX_COMMIT;
/* update ring state every TX_COMMIT descriptor */
tx_ring->next_to_clean = next_to_clean;
ena_com_comp_ack(
&adapter->ena_dev->io_sq_queues[ena_qid],
total_done);
ena_com_update_dev_comp_head(io_cq);
total_done = 0;
}
} while (likely(--budget));
work_done = TX_BUDGET - budget;
ena_trace(ENA_DBG | ENA_TXPTH, "tx: q %d done. total pkts: %d",
tx_ring->qid, work_done);
/* If there is still something to commit update ring state */
if (likely(commit != TX_COMMIT)) {
tx_ring->next_to_clean = next_to_clean;
ena_com_comp_ack(&adapter->ena_dev->io_sq_queues[ena_qid],
total_done);
ena_com_update_dev_comp_head(io_cq);
}
taskqueue_enqueue(tx_ring->enqueue_tq, &tx_ring->enqueue_task);
return (work_done);
}
static void
ena_rx_hash_mbuf(struct ena_ring *rx_ring, struct ena_com_rx_ctx *ena_rx_ctx,
struct mbuf *mbuf)
{
struct ena_adapter *adapter = rx_ring->adapter;
if (likely(adapter->rss_support)) {
mbuf->m_pkthdr.flowid = ena_rx_ctx->hash;
if (ena_rx_ctx->frag &&
(ena_rx_ctx->l3_proto != ENA_ETH_IO_L3_PROTO_UNKNOWN)) {
M_HASHTYPE_SET(mbuf, M_HASHTYPE_OPAQUE_HASH);
return;
}
switch (ena_rx_ctx->l3_proto) {
case ENA_ETH_IO_L3_PROTO_IPV4:
switch (ena_rx_ctx->l4_proto) {
case ENA_ETH_IO_L4_PROTO_TCP:
M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_TCP_IPV4);
break;
case ENA_ETH_IO_L4_PROTO_UDP:
M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_UDP_IPV4);
break;
default:
M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_IPV4);
}
break;
case ENA_ETH_IO_L3_PROTO_IPV6:
switch (ena_rx_ctx->l4_proto) {
case ENA_ETH_IO_L4_PROTO_TCP:
M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_TCP_IPV6);
break;
case ENA_ETH_IO_L4_PROTO_UDP:
M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_UDP_IPV6);
break;
default:
M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_IPV6);
}
break;
case ENA_ETH_IO_L3_PROTO_UNKNOWN:
M_HASHTYPE_SET(mbuf, M_HASHTYPE_NONE);
break;
default:
M_HASHTYPE_SET(mbuf, M_HASHTYPE_OPAQUE_HASH);
}
} else {
mbuf->m_pkthdr.flowid = rx_ring->qid;
M_HASHTYPE_SET(mbuf, M_HASHTYPE_NONE);
}
}
/**
* ena_rx_mbuf - assemble mbuf from descriptors
* @rx_ring: ring for which we want to clean packets
* @ena_bufs: buffer info
* @ena_rx_ctx: metadata for this packet(s)
* @next_to_clean: ring pointer, will be updated only upon success
*
**/
static struct mbuf*
ena_rx_mbuf(struct ena_ring *rx_ring, struct ena_com_rx_buf_info *ena_bufs,
struct ena_com_rx_ctx *ena_rx_ctx, uint16_t *next_to_clean)
{
struct mbuf *mbuf;
struct ena_rx_buffer *rx_info;
struct ena_adapter *adapter;
unsigned int descs = ena_rx_ctx->descs;
uint16_t ntc, len, req_id, buf = 0;
ntc = *next_to_clean;
adapter = rx_ring->adapter;
rx_info = &rx_ring->rx_buffer_info[ntc];
if (unlikely(rx_info->mbuf == NULL)) {
device_printf(adapter->pdev, "NULL mbuf in rx_info");
return (NULL);
}
len = ena_bufs[buf].len;
req_id = ena_bufs[buf].req_id;
rx_info = &rx_ring->rx_buffer_info[req_id];
ena_trace(ENA_DBG | ENA_RXPTH, "rx_info %p, mbuf %p, paddr %jx",
rx_info, rx_info->mbuf, (uintmax_t)rx_info->ena_buf.paddr);
mbuf = rx_info->mbuf;
mbuf->m_flags |= M_PKTHDR;
mbuf->m_pkthdr.len = len;
mbuf->m_len = len;
mbuf->m_pkthdr.rcvif = rx_ring->que->adapter->ifp;
/* Fill mbuf with hash key and it's interpretation for optimization */
ena_rx_hash_mbuf(rx_ring, ena_rx_ctx, mbuf);
ena_trace(ENA_DBG | ENA_RXPTH, "rx mbuf 0x%p, flags=0x%x, len: %d",
mbuf, mbuf->m_flags, mbuf->m_pkthdr.len);
/* DMA address is not needed anymore, unmap it */
bus_dmamap_unload(rx_ring->adapter->rx_buf_tag, rx_info->map);
rx_info->mbuf = NULL;
rx_ring->free_rx_ids[ntc] = req_id;
ntc = ENA_RX_RING_IDX_NEXT(ntc, rx_ring->ring_size);
/*
* While we have more than 1 descriptors for one rcvd packet, append
* other mbufs to the main one
*/
while (--descs) {
++buf;
len = ena_bufs[buf].len;
req_id = ena_bufs[buf].req_id;
rx_info = &rx_ring->rx_buffer_info[req_id];
if (unlikely(rx_info->mbuf == NULL)) {
device_printf(adapter->pdev, "NULL mbuf in rx_info");
/*
* If one of the required mbufs was not allocated yet,
* we can break there.
* All earlier used descriptors will be reallocated
* later and not used mbufs can be reused.
* The next_to_clean pointer will not be updated in case
* of an error, so caller should advance it manually
* in error handling routine to keep it up to date
* with hw ring.
*/
m_freem(mbuf);
return (NULL);
}
if (unlikely(m_append(mbuf, len, rx_info->mbuf->m_data) == 0)) {
counter_u64_add(rx_ring->rx_stats.mbuf_alloc_fail, 1);
ena_trace(ENA_WARNING, "Failed to append Rx mbuf %p",
mbuf);
}
ena_trace(ENA_DBG | ENA_RXPTH,
"rx mbuf updated. len %d", mbuf->m_pkthdr.len);
/* Free already appended mbuf, it won't be useful anymore */
bus_dmamap_unload(rx_ring->adapter->rx_buf_tag, rx_info->map);
m_freem(rx_info->mbuf);
rx_info->mbuf = NULL;
rx_ring->free_rx_ids[ntc] = req_id;
ntc = ENA_RX_RING_IDX_NEXT(ntc, rx_ring->ring_size);
}
*next_to_clean = ntc;
return (mbuf);
}
/**
* ena_rx_checksum - indicate in mbuf if hw indicated a good cksum
**/
static inline void
ena_rx_checksum(struct ena_ring *rx_ring, struct ena_com_rx_ctx *ena_rx_ctx,
struct mbuf *mbuf)
{
/* if IP and error */
if (unlikely((ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4) &&
ena_rx_ctx->l3_csum_err)) {
/* ipv4 checksum error */
mbuf->m_pkthdr.csum_flags = 0;
counter_u64_add(rx_ring->rx_stats.bad_csum, 1);
ena_trace(ENA_DBG, "RX IPv4 header checksum error");
return;
}
/* if TCP/UDP */
if ((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
(ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP)) {
if (ena_rx_ctx->l4_csum_err) {
/* TCP/UDP checksum error */
mbuf->m_pkthdr.csum_flags = 0;
counter_u64_add(rx_ring->rx_stats.bad_csum, 1);
ena_trace(ENA_DBG, "RX L4 checksum error");
} else {
mbuf->m_pkthdr.csum_flags = CSUM_IP_CHECKED;
mbuf->m_pkthdr.csum_flags |= CSUM_IP_VALID;
}
}
}
static void
ena_deferred_rx_cleanup(void *arg, int pending)
{
struct ena_ring *rx_ring = arg;
int budget = CLEAN_BUDGET;
ENA_RING_MTX_LOCK(rx_ring);
/*
* If deferred task was executed, perform cleanup of all awaiting
* descs (or until given budget is depleted to avoid infinite loop).
*/
while (likely(budget--)) {
if (ena_rx_cleanup(rx_ring) == 0)
break;
}
ENA_RING_MTX_UNLOCK(rx_ring);
}
/**
* ena_rx_cleanup - handle rx irq
* @arg: ring for which irq is being handled
**/
static int
ena_rx_cleanup(struct ena_ring *rx_ring)
{
struct ena_adapter *adapter;
struct mbuf *mbuf;
struct ena_com_rx_ctx ena_rx_ctx;
struct ena_com_io_cq* io_cq;
struct ena_com_io_sq* io_sq;
if_t ifp;
uint16_t ena_qid;
uint16_t next_to_clean;
uint32_t refill_required;
uint32_t refill_threshold;
uint32_t do_if_input = 0;
unsigned int qid;
int rc, i;
int budget = RX_BUDGET;
adapter = rx_ring->que->adapter;
ifp = adapter->ifp;
qid = rx_ring->que->id;
ena_qid = ENA_IO_RXQ_IDX(qid);
io_cq = &adapter->ena_dev->io_cq_queues[ena_qid];
io_sq = &adapter->ena_dev->io_sq_queues[ena_qid];
next_to_clean = rx_ring->next_to_clean;
ena_trace(ENA_DBG, "rx: qid %d", qid);
do {
ena_rx_ctx.ena_bufs = rx_ring->ena_bufs;
ena_rx_ctx.max_bufs = adapter->max_rx_sgl_size;
ena_rx_ctx.descs = 0;
rc = ena_com_rx_pkt(io_cq, io_sq, &ena_rx_ctx);
if (unlikely(rc != 0))
goto error;
if (unlikely(ena_rx_ctx.descs == 0))
break;
ena_trace(ENA_DBG | ENA_RXPTH, "rx: q %d got packet from ena. "
"descs #: %d l3 proto %d l4 proto %d hash: %x",
rx_ring->qid, ena_rx_ctx.descs, ena_rx_ctx.l3_proto,
ena_rx_ctx.l4_proto, ena_rx_ctx.hash);
/* Receive mbuf from the ring */
mbuf = ena_rx_mbuf(rx_ring, rx_ring->ena_bufs,
&ena_rx_ctx, &next_to_clean);
/* Exit if we failed to retrieve a buffer */
if (unlikely(mbuf == NULL)) {
for (i = 0; i < ena_rx_ctx.descs; ++i) {
rx_ring->free_rx_ids[next_to_clean] =
rx_ring->ena_bufs[i].req_id;
next_to_clean =
ENA_RX_RING_IDX_NEXT(next_to_clean,
rx_ring->ring_size);
}
break;
}
if (((ifp->if_capenable & IFCAP_RXCSUM) != 0) ||
((ifp->if_capenable & IFCAP_RXCSUM_IPV6) != 0)) {
ena_rx_checksum(rx_ring, &ena_rx_ctx, mbuf);
}
counter_enter();
counter_u64_add_protected(rx_ring->rx_stats.bytes,
mbuf->m_pkthdr.len);
counter_u64_add_protected(adapter->hw_stats.rx_bytes,
mbuf->m_pkthdr.len);
counter_exit();
/*
* LRO is only for IP/TCP packets and TCP checksum of the packet
* should be computed by hardware.
*/
do_if_input = 1;
if (((ifp->if_capenable & IFCAP_LRO) != 0) &&
((mbuf->m_pkthdr.csum_flags & CSUM_IP_VALID) != 0) &&
(ena_rx_ctx.l4_proto == ENA_ETH_IO_L4_PROTO_TCP)) {
/*
* Send to the stack if:
* - LRO not enabled, or
* - no LRO resources, or
* - lro enqueue fails
*/
if ((rx_ring->lro.lro_cnt != 0) &&
(tcp_lro_rx(&rx_ring->lro, mbuf, 0) == 0))
do_if_input = 0;
}
if (do_if_input != 0) {
ena_trace(ENA_DBG | ENA_RXPTH,
"calling if_input() with mbuf %p", mbuf);
(*ifp->if_input)(ifp, mbuf);
}
counter_enter();
counter_u64_add_protected(rx_ring->rx_stats.cnt, 1);
counter_u64_add_protected(adapter->hw_stats.rx_packets, 1);
counter_exit();
} while (--budget);
rx_ring->next_to_clean = next_to_clean;
refill_required = ena_com_free_desc(io_sq);
refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER;
if (refill_required > refill_threshold) {
ena_com_update_dev_comp_head(rx_ring->ena_com_io_cq);
ena_refill_rx_bufs(rx_ring, refill_required);
}
tcp_lro_flush_all(&rx_ring->lro);
return (RX_BUDGET - budget);
error:
counter_u64_add(rx_ring->rx_stats.bad_desc_num, 1);
return (RX_BUDGET - budget);
}
/*********************************************************************
*
* 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(adapter->running))
ena_com_aenq_intr_handler(adapter->ena_dev, arg);
}
/**
* ena_handle_msix - MSIX Interrupt Handler for Tx/Rx
* @arg: interrupt number
**/
static void
ena_handle_msix(void *arg)
{
struct ena_que *que = arg;
struct ena_adapter *adapter = que->adapter;
if_t ifp = adapter->ifp;
struct ena_ring *tx_ring;
struct ena_ring *rx_ring;
struct ena_com_io_cq* io_cq;
struct ena_eth_io_intr_reg intr_reg;
int qid, ena_qid;
int txc, rxc, i;
if (unlikely((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0))
return;
ena_trace(ENA_DBG, "MSI-X TX/RX routine");
tx_ring = que->tx_ring;
rx_ring = que->rx_ring;
qid = que->id;
ena_qid = ENA_IO_TXQ_IDX(qid);
io_cq = &adapter->ena_dev->io_cq_queues[ena_qid];
for (i = 0; i < CLEAN_BUDGET; ++i) {
/*
* If lock cannot be acquired, then deferred cleanup task was
* being executed and rx ring is being cleaned up in
* another thread.
*/
if (likely(ENA_RING_MTX_TRYLOCK(rx_ring) != 0)) {
rxc = ena_rx_cleanup(rx_ring);
ENA_RING_MTX_UNLOCK(rx_ring);
} else {
rxc = 0;
}
/* Protection from calling ena_tx_cleanup from ena_start_xmit */
ENA_RING_MTX_LOCK(tx_ring);
txc = ena_tx_cleanup(tx_ring);
ENA_RING_MTX_UNLOCK(tx_ring);
if (unlikely((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0))
return;
if ((txc != TX_BUDGET) && (rxc != RX_BUDGET))
break;
}
/* Signal that work is done and unmask interrupt */
ena_com_update_intr_reg(&intr_reg,
RX_IRQ_INTERVAL,
TX_IRQ_INTERVAL,
true);
ena_com_unmask_intr(io_cq, &intr_reg);
}
static int
ena_enable_msix(struct ena_adapter *adapter)
{
device_t dev = adapter->pdev;
int msix_vecs, msix_req;
int i, rc = 0;
/* Reserved the max msix vectors we might need */
msix_vecs = ENA_MAX_MSIX_VEC(adapter->num_queues);
adapter->msix_entries = malloc(msix_vecs * sizeof(struct msix_entry),
M_DEVBUF, M_WAITOK | M_ZERO);
ena_trace(ENA_DBG, "trying to enable MSI-X, vectors: %d", 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) {
device_printf(dev, "Enable only %d MSI-x (out of %d), reduce "
"the number of queues\n", msix_vecs, msix_req);
adapter->num_queues = msix_vecs - ENA_ADMIN_MSIX_VEC;
}
adapter->msix_vecs = msix_vecs;
adapter->msix_enabled = true;
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 void
ena_setup_io_intr(struct ena_adapter *adapter)
{
static int last_bind_cpu = -1;
int irq_idx;
for (int i = 0; i < adapter->num_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(ENA_INFO | ENA_IOQ, "ena_setup_io_intr vector: %d\n",
adapter->msix_entries[irq_idx].vector);
#ifdef RSS
adapter->que[i].cpu = adapter->irq_tbl[irq_idx].cpu =
rss_getcpu(i % rss_getnumbuckets());
#else
/*
* We still 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);
#endif
}
}
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_activate_resource(adapter->pdev, SYS_RES_IRQ,
irq->vector, irq->res);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev, "could not activate "
"irq vector: %d\n", irq->vector);
goto err_res_free;
}
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(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(adapter->msix_enabled == 0)) {
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)) {
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, NULL,
irq->handler, 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;
#ifdef RSS
ena_trace(ENA_INFO, "queue %d - RSS bucket %d\n",
i - ENA_IO_IRQ_FIRST_IDX, irq->cpu);
#else
ena_trace(ENA_INFO, "queue %d - cpu %d\n",
i - ENA_IO_IRQ_FIRST_IDX, irq->cpu);
#endif
}
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(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(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(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(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)
{
pci_release_msi(adapter->pdev);
adapter->msix_vecs = 0;
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_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;
/* 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(adapter->rss_support)) {
rc = ena_rss_configure(adapter);
if (rc != 0)
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 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 (unlikely(!adapter->running)) {
device_printf(adapter->pdev, "device is not running!\n");
return (ENXIO);
}
if (!adapter->up) {
device_printf(adapter->pdev, "device is going UP\n");
/* setup interrupts for IO queues */
ena_setup_io_intr(adapter);
rc = ena_request_io_irq(adapter);
if (unlikely(rc != 0)) {
ena_trace(ENA_ALERT, "err_req_irq");
goto err_req_irq;
}
/* allocate transmit descriptors */
rc = ena_setup_all_tx_resources(adapter);
if (unlikely(rc != 0)) {
ena_trace(ENA_ALERT, "err_setup_tx");
goto err_setup_tx;
}
/* allocate receive descriptors */
rc = ena_setup_all_rx_resources(adapter);
if (unlikely(rc != 0)) {
ena_trace(ENA_ALERT, "err_setup_rx");
goto err_setup_rx;
}
/* create IO queues for Rx & Tx */
rc = ena_create_io_queues(adapter);
if (unlikely(rc != 0)) {
ena_trace(ENA_ALERT,
"create IO queues failed");
goto err_io_que;
}
if (unlikely(adapter->link_status))
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);
callout_reset_sbt(&adapter->timer_service, SBT_1S, SBT_1S,
ena_timer_service, (void *)adapter, 0);
adapter->up = true;
ena_unmask_all_io_irqs(adapter);
}
return (0);
err_up_complete:
ena_destroy_all_io_queues(adapter);
err_io_que:
ena_free_all_rx_resources(adapter);
err_setup_rx:
ena_free_all_tx_resources(adapter);
err_setup_tx:
ena_free_io_irq(adapter);
err_req_irq:
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));
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(ENA_DBG, "enter");
mtx_lock(&adapter->global_mtx);
ifmr->ifm_status = IFM_AVALID;
ifmr->ifm_active = IFM_ETHER;
if (!adapter->link_status) {
mtx_unlock(&adapter->global_mtx);
ena_trace(ENA_INFO, "link_status = false");
return;
}
ifmr->ifm_status |= IFM_ACTIVE;
ifmr->ifm_active |= IFM_10G_T | IFM_FDX;
mtx_unlock(&adapter->global_mtx);
}
static void
ena_init(void *arg)
{
struct ena_adapter *adapter = (struct ena_adapter *)arg;
if (!adapter->up) {
sx_xlock(&adapter->ioctl_sx);
ena_up(adapter);
sx_unlock(&adapter->ioctl_sx);
}
}
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:
sx_xlock(&adapter->ioctl_sx);
ena_down(adapter);
ena_change_mtu(ifp, ifr->ifr_mtu);
rc = ena_up(adapter);
sx_unlock(&adapter->ioctl_sx);
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 {
sx_xlock(&adapter->ioctl_sx);
rc = ena_up(adapter);
sx_unlock(&adapter->ioctl_sx);
}
} else {
if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) {
sx_xlock(&adapter->ioctl_sx);
ena_down(adapter);
sx_unlock(&adapter->ioctl_sx);
}
}
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)) {
sx_xlock(&adapter->ioctl_sx);
ena_down(adapter);
rc = ena_up(adapter);
sx_unlock(&adapter->ioctl_sx);
}
}
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(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);
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->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);
}
static void
ena_down(struct ena_adapter *adapter)
{
int rc;
if (adapter->up) {
device_printf(adapter->pdev, "device is going DOWN\n");
callout_drain(&adapter->timer_service);
adapter->up = false;
if_setdrvflagbits(adapter->ifp, IFF_DRV_OACTIVE,
IFF_DRV_RUNNING);
ena_free_io_irq(adapter);
if (adapter->trigger_reset) {
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 void
ena_tx_csum(struct ena_com_tx_ctx *ena_tx_ctx, struct mbuf *mbuf)
{
struct ena_com_tx_meta *ena_meta;
struct ether_vlan_header *eh;
u32 mss;
bool offload;
uint16_t etype;
int ehdrlen;
struct ip *ip;
int iphlen;
struct tcphdr *th;
offload = false;
ena_meta = &ena_tx_ctx->ena_meta;
mss = mbuf->m_pkthdr.tso_segsz;
if (mss != 0)
offload = true;
if ((mbuf->m_pkthdr.csum_flags & CSUM_TSO) != 0)
offload = true;
if ((mbuf->m_pkthdr.csum_flags & CSUM_OFFLOAD) != 0)
offload = true;
if (!offload) {
ena_tx_ctx->meta_valid = 0;
return;
}
/* Determine where frame payload starts. */
eh = mtod(mbuf, struct ether_vlan_header *);
if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
etype = ntohs(eh->evl_proto);
ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
} else {
etype = ntohs(eh->evl_encap_proto);
ehdrlen = ETHER_HDR_LEN;
}
ip = (struct ip *)(mbuf->m_data + ehdrlen);
iphlen = ip->ip_hl << 2;
th = (struct tcphdr *)((caddr_t)ip + iphlen);
if ((mbuf->m_pkthdr.csum_flags & CSUM_IP) != 0) {
ena_tx_ctx->l3_csum_enable = 1;
}
if ((mbuf->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
ena_tx_ctx->tso_enable = 1;
ena_meta->l4_hdr_len = (th->th_off);
}
switch (etype) {
case ETHERTYPE_IP:
ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4;
if ((ip->ip_off & htons(IP_DF)) != 0)
ena_tx_ctx->df = 1;
break;
case ETHERTYPE_IPV6:
ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV6;
default:
break;
}
if (ip->ip_p == IPPROTO_TCP) {
ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_TCP;
if ((mbuf->m_pkthdr.csum_flags &
(CSUM_IP_TCP | CSUM_IP6_TCP)) != 0)
ena_tx_ctx->l4_csum_enable = 1;
else
ena_tx_ctx->l4_csum_enable = 0;
} else if (ip->ip_p == IPPROTO_UDP) {
ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UDP;
if ((mbuf->m_pkthdr.csum_flags &
(CSUM_IP_UDP | CSUM_IP6_UDP)) != 0)
ena_tx_ctx->l4_csum_enable = 1;
else
ena_tx_ctx->l4_csum_enable = 0;
} else {
ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UNKNOWN;
ena_tx_ctx->l4_csum_enable = 0;
}
ena_meta->mss = mss;
ena_meta->l3_hdr_len = iphlen;
ena_meta->l3_hdr_offset = ehdrlen;
ena_tx_ctx->meta_valid = 1;
}
static int
ena_check_and_collapse_mbuf(struct ena_ring *tx_ring, struct mbuf **mbuf)
{
struct ena_adapter *adapter;
struct mbuf *collapsed_mbuf;
int num_frags;
adapter = tx_ring->adapter;
num_frags = ena_mbuf_count(*mbuf);
/* One segment must be reserved for configuration descriptor. */
if (num_frags < adapter->max_tx_sgl_size)
return (0);
counter_u64_add(tx_ring->tx_stats.collapse, 1);
collapsed_mbuf = m_collapse(*mbuf, M_NOWAIT,
adapter->max_tx_sgl_size - 1);
if (unlikely(collapsed_mbuf == NULL)) {
counter_u64_add(tx_ring->tx_stats.collapse_err, 1);
return (ENOMEM);
}
/* If mbuf was collapsed succesfully, original mbuf is released. */
*mbuf = collapsed_mbuf;
return (0);
}
static int
ena_xmit_mbuf(struct ena_ring *tx_ring, struct mbuf **mbuf)
{
struct ena_adapter *adapter;
struct ena_tx_buffer *tx_info;
struct ena_com_tx_ctx ena_tx_ctx;
struct ena_com_dev *ena_dev;
struct ena_com_buf *ena_buf;
struct ena_com_io_sq* io_sq;
bus_dma_segment_t segs[ENA_BUS_DMA_SEGS];
void *push_hdr;
uint16_t next_to_use;
uint16_t req_id;
uint16_t push_len;
uint16_t ena_qid;
uint32_t len, nsegs, header_len;
int i, rc;
int nb_hw_desc;
ena_qid = ENA_IO_TXQ_IDX(tx_ring->que->id);
adapter = tx_ring->que->adapter;
ena_dev = adapter->ena_dev;
io_sq = &ena_dev->io_sq_queues[ena_qid];
rc = ena_check_and_collapse_mbuf(tx_ring, mbuf);
if (unlikely(rc != 0)) {
ena_trace(ENA_WARNING,
"Failed to collapse mbuf! err: %d", rc);
return (rc);
}
next_to_use = tx_ring->next_to_use;
req_id = tx_ring->free_tx_ids[next_to_use];
tx_info = &tx_ring->tx_buffer_info[req_id];
tx_info->mbuf = *mbuf;
tx_info->num_of_bufs = 0;
ena_buf = tx_info->bufs;
len = (*mbuf)->m_len;
ena_trace(ENA_DBG | ENA_TXPTH, "Tx: %d bytes", (*mbuf)->m_pkthdr.len);
push_len = 0;
header_len = min_t(uint32_t, len, tx_ring->tx_max_header_size);
push_hdr = NULL;
rc = bus_dmamap_load_mbuf_sg(adapter->tx_buf_tag, tx_info->map,
*mbuf, segs, &nsegs, BUS_DMA_NOWAIT);
if (unlikely((rc != 0) || (nsegs == 0))) {
ena_trace(ENA_WARNING,
"dmamap load failed! err: %d nsegs: %d", rc, nsegs);
counter_u64_add(tx_ring->tx_stats.dma_mapping_err, 1);
tx_info->mbuf = NULL;
if (rc == ENOMEM)
return (ENA_COM_NO_MEM);
else
return (ENA_COM_INVAL);
}
for (i = 0; i < nsegs; i++) {
ena_buf->len = segs[i].ds_len;
ena_buf->paddr = segs[i].ds_addr;
ena_buf++;
}
tx_info->num_of_bufs = nsegs;
memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
ena_tx_ctx.ena_bufs = tx_info->bufs;
ena_tx_ctx.push_header = push_hdr;
ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
ena_tx_ctx.req_id = req_id;
ena_tx_ctx.header_len = header_len;
/* Set flags and meta data */
ena_tx_csum(&ena_tx_ctx, *mbuf);
/* Prepare the packet's descriptors and send them to device */
rc = ena_com_prepare_tx(io_sq, &ena_tx_ctx, &nb_hw_desc);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev, "failed to prepare tx bufs\n");
counter_u64_add(tx_ring->tx_stats.prepare_ctx_err, 1);
goto dma_error;
}
counter_enter();
counter_u64_add_protected(tx_ring->tx_stats.cnt, 1);
counter_u64_add_protected(tx_ring->tx_stats.bytes,
(*mbuf)->m_pkthdr.len);
counter_u64_add_protected(adapter->hw_stats.tx_packets, 1);
counter_u64_add_protected(adapter->hw_stats.tx_bytes,
(*mbuf)->m_pkthdr.len);
counter_exit();
tx_info->tx_descs = nb_hw_desc;
getbinuptime(&tx_info->timestamp);
tx_info->print_once = true;
tx_ring->next_to_use = ENA_TX_RING_IDX_NEXT(next_to_use,
tx_ring->ring_size);
bus_dmamap_sync(adapter->tx_buf_tag, tx_info->map,
BUS_DMASYNC_PREWRITE);
return (0);
dma_error:
tx_info->mbuf = NULL;
bus_dmamap_unload(adapter->tx_buf_tag, tx_info->map);
return (rc);
}
static void
ena_start_xmit(struct ena_ring *tx_ring)
{
struct mbuf *mbuf;
struct ena_adapter *adapter = tx_ring->adapter;
struct ena_com_io_sq* io_sq;
int ena_qid;
int acum_pkts = 0;
int ret = 0;
if (unlikely((if_getdrvflags(adapter->ifp) & IFF_DRV_RUNNING) == 0))
return;
if (unlikely(!adapter->link_status))
return;
ena_qid = ENA_IO_TXQ_IDX(tx_ring->que->id);
io_sq = &adapter->ena_dev->io_sq_queues[ena_qid];
while ((mbuf = drbr_peek(adapter->ifp, tx_ring->br)) != NULL) {
ena_trace(ENA_DBG | ENA_TXPTH, "\ndequeued mbuf %p with flags %#x and"
" header csum flags %#jx",
mbuf, mbuf->m_flags, (uint64_t)mbuf->m_pkthdr.csum_flags);
if (unlikely(!ena_com_sq_have_enough_space(io_sq,
ENA_TX_CLEANUP_THRESHOLD)))
ena_tx_cleanup(tx_ring);
if (unlikely((ret = ena_xmit_mbuf(tx_ring, &mbuf)) != 0)) {
if (ret == ENA_COM_NO_MEM) {
drbr_putback(adapter->ifp, tx_ring->br, mbuf);
} else if (ret == ENA_COM_NO_SPACE) {
drbr_putback(adapter->ifp, tx_ring->br, mbuf);
} else {
m_freem(mbuf);
drbr_advance(adapter->ifp, tx_ring->br);
}
break;
}
drbr_advance(adapter->ifp, tx_ring->br);
if (unlikely((if_getdrvflags(adapter->ifp) &
IFF_DRV_RUNNING) == 0))
return;
acum_pkts++;
BPF_MTAP(adapter->ifp, mbuf);
if (unlikely(acum_pkts == DB_THRESHOLD)) {
acum_pkts = 0;
wmb();
/* Trigger the dma engine */
ena_com_write_sq_doorbell(io_sq);
counter_u64_add(tx_ring->tx_stats.doorbells, 1);
}
}
if (likely(acum_pkts != 0)) {
wmb();
/* Trigger the dma engine */
ena_com_write_sq_doorbell(io_sq);
counter_u64_add(tx_ring->tx_stats.doorbells, 1);
}
if (!ena_com_sq_have_enough_space(io_sq, ENA_TX_CLEANUP_THRESHOLD))
ena_tx_cleanup(tx_ring);
}
static void
ena_deferred_mq_start(void *arg, int pending)
{
struct ena_ring *tx_ring = (struct ena_ring *)arg;
struct ifnet *ifp = tx_ring->adapter->ifp;
while (!drbr_empty(ifp, tx_ring->br) &&
(if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) {
ENA_RING_MTX_LOCK(tx_ring);
ena_start_xmit(tx_ring);
ENA_RING_MTX_UNLOCK(tx_ring);
}
}
static int
ena_mq_start(if_t ifp, struct mbuf *m)
{
struct ena_adapter *adapter = ifp->if_softc;
struct ena_ring *tx_ring;
int ret, is_drbr_empty;
uint32_t i;
if (unlikely((if_getdrvflags(adapter->ifp) & IFF_DRV_RUNNING) == 0))
return (ENODEV);
/* Which queue to use */
/*
* If everything is setup correctly, it should be the
* same bucket that the current CPU we're on is.
* It should improve performance.
*/
if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
#ifdef RSS
if (rss_hash2bucket(m->m_pkthdr.flowid,
M_HASHTYPE_GET(m), &i) == 0) {
i = i % adapter->num_queues;
} else
#endif
{
i = m->m_pkthdr.flowid % adapter->num_queues;
}
} else {
i = curcpu % adapter->num_queues;
}
tx_ring = &adapter->tx_ring[i];
/* Check if drbr is empty before putting packet */
is_drbr_empty = drbr_empty(ifp, tx_ring->br);
ret = drbr_enqueue(ifp, tx_ring->br, m);
if (unlikely(ret != 0)) {
taskqueue_enqueue(tx_ring->enqueue_tq, &tx_ring->enqueue_task);
return (ret);
}
if ((is_drbr_empty != 0) && (ENA_RING_MTX_TRYLOCK(tx_ring) != 0)) {
ena_start_xmit(tx_ring);
ENA_RING_MTX_UNLOCK(tx_ring);
} else {
taskqueue_enqueue(tx_ring->enqueue_tq, &tx_ring->enqueue_task);
}
return (0);
}
static void
ena_qflush(if_t ifp)
{
struct ena_adapter *adapter = ifp->if_softc;
struct ena_ring *tx_ring = adapter->tx_ring;
int i;
for(i = 0; i < adapter->num_queues; ++i, ++tx_ring)
if (!drbr_empty(ifp, tx_ring->br)) {
ENA_RING_MTX_LOCK(tx_ring);
drbr_flush(ifp, tx_ring->br);
ENA_RING_MTX_UNLOCK(tx_ring);
}
if_qflush(ifp);
}
static int
ena_calc_io_queue_num(struct ena_adapter *adapter,
struct ena_com_dev_get_features_ctx *get_feat_ctx)
{
int io_sq_num, io_cq_num, io_queue_num;
io_sq_num = get_feat_ctx->max_queues.max_sq_num;
io_cq_num = get_feat_ctx->max_queues.max_cq_num;
io_queue_num = min_t(int, mp_ncpus, ENA_MAX_NUM_IO_QUEUES);
io_queue_num = min_t(int, io_queue_num, io_sq_num);
io_queue_num = min_t(int, io_queue_num, io_cq_num);
/* 1 IRQ for for mgmnt and 1 IRQ for each TX/RX pair */
io_queue_num = min_t(int, io_queue_num,
pci_msix_count(adapter->pdev) - 1);
#ifdef RSS
io_queue_num = min_t(int, io_queue_num, rss_getnumbuckets());
#endif
return (io_queue_num);
}
static int
ena_calc_queue_size(struct ena_adapter *adapter, uint16_t *max_tx_sgl_size,
uint16_t *max_rx_sgl_size, struct ena_com_dev_get_features_ctx *feat)
{
uint32_t queue_size = ENA_DEFAULT_RING_SIZE;
uint32_t v;
uint32_t q;
queue_size = min_t(uint32_t, queue_size,
feat->max_queues.max_cq_depth);
queue_size = min_t(uint32_t, queue_size,
feat->max_queues.max_sq_depth);
/* round down to the nearest power of 2 */
v = queue_size;
while (v != 0) {
if (powerof2(queue_size) != 0)
break;
v /= 2;
q = rounddown2(queue_size, v);
if (q != 0) {
queue_size = q;
break;
}
}
if (unlikely(queue_size == 0)) {
device_printf(adapter->pdev, "Invalid queue size\n");
return (ENA_COM_FAULT);
}
*max_tx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
feat->max_queues.max_packet_tx_descs);
*max_rx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
feat->max_queues.max_packet_rx_descs);
return (queue_size);
}
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++) {
#ifdef RSS
qid = rss_get_indirection_to_bucket(i);
qid = qid % adapter->num_queues;
#else
qid = i % adapter->num_queues;
#endif
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;
}
}
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(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);
adapter->rss_support = true;
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"WARNING: RSS was not properly initialized,"
" it will affect bandwidth\n");
adapter->rss_support = false;
}
}
}
}
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)
{
struct ena_admin_host_info *host_info;
int rc;
/* Allocate only the host info */
rc = ena_com_allocate_host_info(ena_dev);
if (unlikely(rc != 0)) {
ena_trace(ENA_ALERT, "Cannot allocate host info\n");
return;
}
host_info = ena_dev->host_attr.host_info;
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);
rc = ena_com_set_host_attributes(ena_dev);
if (unlikely(rc != 0)) {
if (rc == EOPNOTSUPP)
ena_trace(ENA_WARNING, "Cannot set host attributes\n");
else
ena_trace(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, true);
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);
/* 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_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,
int io_vectors)
{
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;
desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e;
rx_drops = ((uint64_t)desc->rx_drops_high << 32) | desc->rx_drops_low;
counter_u64_zero(adapter->hw_stats.rx_drops);
counter_u64_add(adapter->hw_stats.rx_drops, rx_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 (likely(adapter->keep_alive_timeout == 0))
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);
adapter->reset_reason = ENA_REGS_RESET_KEEP_ALIVE_TO;
adapter->trigger_reset = true;
}
}
/* 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);
adapter->reset_reason = ENA_REGS_RESET_ADMIN_TO;
adapter->trigger_reset = true;
}
}
static int
check_missing_comp_in_queue(struct ena_adapter *adapter,
struct ena_ring *tx_ring)
{
struct bintime curtime, time;
struct ena_tx_buffer *tx_buf;
uint32_t missed_tx = 0;
int i;
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);
/* Check again if packet is still waiting */
if (unlikely(bttosbt(time) > adapter->missing_tx_timeout)) {
if (!tx_buf->print_once)
ena_trace(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++;
counter_u64_add(tx_ring->tx_stats.missing_tx_comp, 1);
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);
adapter->reset_reason =
ENA_REGS_RESET_MISS_TX_CMPL;
adapter->trigger_reset = true;
return (EIO);
}
}
}
return (0);
}
/*
* 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_tx_completions(struct ena_adapter *adapter)
{
struct ena_ring *tx_ring;
int i, budget, rc;
/* Make sure the driver doesn't turn the device in other process */
rmb();
if (!adapter->up)
return;
if (adapter->trigger_reset)
return;
if (adapter->missing_tx_timeout == 0)
return;
budget = adapter->missing_tx_max_queues;
for (i = adapter->next_monitored_tx_qid; i < adapter->num_queues; i++) {
tx_ring = &adapter->tx_ring[i];
rc = check_missing_comp_in_queue(adapter, tx_ring);
if (unlikely(rc != 0))
return;
budget--;
if (budget == 0) {
i++;
break;
}
}
adapter->next_monitored_tx_qid = i % adapter->num_queues;
}
/* trigger deferred 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 (!adapter->up)
return;
if (adapter->trigger_reset)
return;
for (i = 0; i < adapter->num_queues; i++) {
rx_ring = &adapter->rx_ring[i];
refill_required = ena_com_free_desc(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->cmpl_tq,
&rx_ring->cmpl_task);
rx_ring->empty_rx_queue = 0;
}
} else {
rx_ring->empty_rx_queue = 0;
}
}
}
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_tx_completions(adapter);
check_for_empty_rx_ring(adapter);
if (host_info != NULL)
ena_update_host_info(host_info, adapter->ifp);
if (unlikely(adapter->trigger_reset)) {
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);
}
static void
ena_reset_task(void *arg, int pending)
{
struct ena_com_dev_get_features_ctx get_feat_ctx;
struct ena_adapter *adapter = (struct ena_adapter *)arg;
struct ena_com_dev *ena_dev = adapter->ena_dev;
bool dev_up;
int rc;
if (unlikely(!adapter->trigger_reset)) {
device_printf(adapter->pdev,
"device reset scheduled but trigger_reset is off\n");
return;
}
sx_xlock(&adapter->ioctl_sx);
callout_drain(&adapter->timer_service);
dev_up = adapter->up;
ena_com_set_admin_running_state(ena_dev, false);
ena_down(adapter);
ena_free_mgmnt_irq(adapter);
ena_disable_msix(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;
adapter->trigger_reset = false;
/* Finished destroy part. Restart the device */
rc = ena_device_init(adapter, adapter->pdev, &get_feat_ctx,
&adapter->wd_active);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"ENA device init failed! (err: %d)\n", rc);
goto err_dev_free;
}
rc = ena_enable_msix_and_set_admin_interrupts(adapter,
adapter->num_queues);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev, "Enable MSI-X failed\n");
goto err_com_free;
}
/* If the interface was up before the reset bring it up */
if (dev_up) {
rc = ena_up(adapter);
if (unlikely(rc != 0)) {
device_printf(adapter->pdev,
"Failed to create I/O queues\n");
goto err_msix_free;
}
}
callout_reset_sbt(&adapter->timer_service, SBT_1S, SBT_1S,
ena_timer_service, (void *)adapter, 0);
sx_unlock(&adapter->ioctl_sx);
return;
err_msix_free:
ena_free_mgmnt_irq(adapter);
ena_disable_msix(adapter);
err_com_free:
ena_com_admin_destroy(ena_dev);
err_dev_free:
device_printf(adapter->pdev, "ENA reset failed!\n");
adapter->running = false;
sx_unlock(&adapter->ioctl_sx);
}
/**
* 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;
static int version_printed;
struct ena_adapter *adapter;
struct ena_com_dev *ena_dev = NULL;
uint16_t tx_sgl_size = 0;
uint16_t rx_sgl_size = 0;
int io_queue_num;
int queue_size;
int rc;
adapter = device_get_softc(pdev);
adapter->pdev = pdev;
mtx_init(&adapter->global_mtx, "ENA global mtx", NULL, MTX_DEF);
sx_init(&adapter->ioctl_sx, "ENA ioctl sx");
/* Set up the timer service */
callout_init_mtx(&adapter->timer_service, &adapter->global_mtx, 0);
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);
rc = ena_allocate_pci_resources(adapter);
if (unlikely(rc != 0)) {
device_printf(pdev, "PCI resource allocation failed!\n");
ena_free_pci_resources(adapter);
return (rc);
}
/* 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;
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;
/* 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;
}
adapter->keep_alive_timestamp = getsbinuptime();
adapter->tx_offload_cap = get_feat_ctx.offload.tx;
/* Set for sure that interface is not up */
adapter->up = false;
memcpy(adapter->mac_addr, get_feat_ctx.dev_attr.mac_addr,
ETHER_ADDR_LEN);
/* calculate IO queue number to create */
io_queue_num = ena_calc_io_queue_num(adapter, &get_feat_ctx);
ENA_ASSERT(io_queue_num > 0, "Invalid queue number: %d\n",
io_queue_num);
adapter->num_queues = io_queue_num;
adapter->max_mtu = get_feat_ctx.dev_attr.max_mtu;
/* calculatre ring sizes */
queue_size = ena_calc_queue_size(adapter,&tx_sgl_size,
&rx_sgl_size, &get_feat_ctx);
if (unlikely((queue_size <= 0) || (io_queue_num <= 0))) {
rc = ENA_COM_FAULT;
goto err_com_free;
}
adapter->reset_reason = ENA_REGS_RESET_NORMAL;
adapter->tx_ring_size = queue_size;
adapter->rx_ring_size = queue_size;
adapter->max_tx_sgl_size = tx_sgl_size;
adapter->max_rx_sgl_size = rx_sgl_size;
/* 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;
}
/* initialize rings basic information */
device_printf(pdev, "initalize %d io queues\n", io_queue_num);
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_io_free;
}
rc = ena_enable_msix_and_set_admin_interrupts(adapter, io_queue_num);
if (unlikely(rc != 0)) {
device_printf(pdev,
"Failed to enable and set the admin interrupts\n");
goto err_ifp_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);
/* Tell the stack that the interface is not active */
if_setdrvflagbits(adapter->ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
adapter->running = true;
return (0);
err_ifp_free:
if_detach(adapter->ifp);
if_free(adapter->ifp);
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);
free(ena_dev, M_DEVBUF);
ena_free_pci_resources(adapter);
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);
}
/* Free reset task and callout */
callout_drain(&adapter->timer_service);
while (taskqueue_cancel(adapter->reset_tq, &adapter->reset_task, NULL))
taskqueue_drain(adapter->reset_tq, &adapter->reset_task);
taskqueue_free(adapter->reset_tq);
sx_xlock(&adapter->ioctl_sx);
ena_down(adapter);
sx_unlock(&adapter->ioctl_sx);
if (adapter->ifp != NULL) {
ether_ifdetach(adapter->ifp);
if_free(adapter->ifp);
}
ena_free_all_io_rings_resources(adapter);
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));
if (likely(adapter->rss_support))
ena_com_rss_destroy(ena_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");
/* Reset the device only if the device is running. */
if (adapter->running)
ena_com_dev_reset(ena_dev, adapter->reset_reason);
ena_com_delete_host_info(ena_dev);
ena_free_irqs(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);
ena_free_pci_resources(adapter);
mtx_destroy(&adapter->global_mtx);
sx_destroy(&adapter->ioctl_sx);
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");
if_link_state_change(ifp, LINK_STATE_UP);
} else if (status == 0) {
device_printf(adapter->pdev, "link is DOWN\n");
if_link_state_change(ifp, LINK_STATE_DOWN);
} else {
device_printf(adapter->pdev, "invalid value recvd\n");
BUG();
}
adapter->link_status = status;
}
/**
* This handler will called for unknown event group or unimplemented handlers
**/
static void
unimplemented_aenq_handler(void *data,
struct ena_admin_aenq_entry *aenq_e)
{
return;
}
static struct ena_aenq_handlers aenq_handlers = {
.handlers = {
[ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
[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_DEPEND(ena, pci, 1, 1, 1);
MODULE_DEPEND(ena, ether, 1, 1, 1);
/*********************************************************************/
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