#include <errno.h>
#include <stdlib.h>
#include <string.h>
-#include <poll.h>
#include <netinet/in.h>
#include <net/if.h>
#include <sys/socket.h>
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include "af_xdp_deps.h"
-#include <bpf/xsk.h>
#include <rte_ethdev.h>
-#include <rte_ethdev_driver.h>
-#include <rte_ethdev_vdev.h>
+#include <ethdev_driver.h>
+#include <ethdev_vdev.h>
#include <rte_kvargs.h>
#include <rte_bus_vdev.h>
#include <rte_string_fns.h>
#include <rte_malloc.h>
#include <rte_ring.h>
#include <rte_spinlock.h>
+#include <rte_power_intrinsics.h>
#include "compat.h"
+#ifndef SO_PREFER_BUSY_POLL
+#define SO_PREFER_BUSY_POLL 69
+#endif
+#ifndef SO_BUSY_POLL_BUDGET
+#define SO_BUSY_POLL_BUDGET 70
+#endif
+
#ifndef SOL_XDP
#define SOL_XDP 283
#define PF_XDP AF_XDP
#endif
-RTE_LOG_REGISTER(af_xdp_logtype, pmd.net.af_xdp, NOTICE);
+RTE_LOG_REGISTER_DEFAULT(af_xdp_logtype, NOTICE);
#define AF_XDP_LOG(level, fmt, args...) \
rte_log(RTE_LOG_ ## level, af_xdp_logtype, \
#define ETH_AF_XDP_DFLT_NUM_DESCS XSK_RING_CONS__DEFAULT_NUM_DESCS
#define ETH_AF_XDP_DFLT_START_QUEUE_IDX 0
#define ETH_AF_XDP_DFLT_QUEUE_COUNT 1
+#define ETH_AF_XDP_DFLT_BUSY_BUDGET 64
+#define ETH_AF_XDP_DFLT_BUSY_TIMEOUT 20
-#define ETH_AF_XDP_RX_BATCH_SIZE 32
-#define ETH_AF_XDP_TX_BATCH_SIZE 32
+#define ETH_AF_XDP_RX_BATCH_SIZE XSK_RING_CONS__DEFAULT_NUM_DESCS
+#define ETH_AF_XDP_TX_BATCH_SIZE XSK_RING_CONS__DEFAULT_NUM_DESCS
+#define ETH_AF_XDP_ETH_OVERHEAD (RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN)
+
+#define ETH_AF_XDP_MP_KEY "afxdp_mp_send_fds"
+
+static int afxdp_dev_count;
+
+/* Message header to synchronize fds via IPC */
+struct ipc_hdr {
+ char port_name[RTE_DEV_NAME_MAX_LEN];
+ /* The file descriptors are in the dedicated part
+ * of the Unix message to be translated by the kernel.
+ */
+};
struct xsk_umem_info {
struct xsk_umem *umem;
struct pkt_tx_queue *pair;
struct pollfd fds[1];
int xsk_queue_idx;
+ int busy_budget;
};
struct tx_stats {
bool shared_umem;
char prog_path[PATH_MAX];
bool custom_prog_configured;
+ struct bpf_map *map;
struct rte_ether_addr eth_addr;
struct pkt_tx_queue *tx_queues;
};
+struct pmd_process_private {
+ int rxq_xsk_fds[RTE_MAX_QUEUES_PER_PORT];
+};
+
#define ETH_AF_XDP_IFACE_ARG "iface"
#define ETH_AF_XDP_START_QUEUE_ARG "start_queue"
#define ETH_AF_XDP_QUEUE_COUNT_ARG "queue_count"
#define ETH_AF_XDP_SHARED_UMEM_ARG "shared_umem"
#define ETH_AF_XDP_PROG_ARG "xdp_prog"
+#define ETH_AF_XDP_BUDGET_ARG "busy_budget"
static const char * const valid_arguments[] = {
ETH_AF_XDP_IFACE_ARG,
ETH_AF_XDP_QUEUE_COUNT_ARG,
ETH_AF_XDP_SHARED_UMEM_ARG,
ETH_AF_XDP_PROG_ARG,
+ ETH_AF_XDP_BUDGET_ARG,
NULL
};
static const struct rte_eth_link pmd_link = {
- .link_speed = ETH_SPEED_NUM_10G,
- .link_duplex = ETH_LINK_FULL_DUPLEX,
- .link_status = ETH_LINK_DOWN,
- .link_autoneg = ETH_LINK_AUTONEG
+ .link_speed = RTE_ETH_SPEED_NUM_10G,
+ .link_duplex = RTE_ETH_LINK_FULL_DUPLEX,
+ .link_status = RTE_ETH_LINK_DOWN,
+ .link_autoneg = RTE_ETH_LINK_AUTONEG
};
/* List which tracks PMDs to facilitate sharing UMEMs across them. */
struct xsk_umem_info *umem = rxq->umem;
uint32_t idx_rx = 0;
unsigned long rx_bytes = 0;
- int rcvd, i;
+ int i;
struct rte_mbuf *fq_bufs[ETH_AF_XDP_RX_BATCH_SIZE];
+ nb_pkts = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
+
+ if (nb_pkts == 0) {
+ /* we can assume a kernel >= 5.11 is in use if busy polling is
+ * enabled and thus we can safely use the recvfrom() syscall
+ * which is only supported for AF_XDP sockets in kernels >=
+ * 5.11.
+ */
+ if (rxq->busy_budget) {
+ (void)recvfrom(xsk_socket__fd(rxq->xsk), NULL, 0,
+ MSG_DONTWAIT, NULL, NULL);
+ } else if (xsk_ring_prod__needs_wakeup(fq)) {
+ (void)poll(&rxq->fds[0], 1, 1000);
+ }
+
+ return 0;
+ }
+
/* allocate bufs for fill queue replenishment after rx */
if (rte_pktmbuf_alloc_bulk(umem->mb_pool, fq_bufs, nb_pkts)) {
AF_XDP_LOG(DEBUG,
"Failed to get enough buffers for fq.\n");
+ /* rollback cached_cons which is added by
+ * xsk_ring_cons__peek
+ */
+ rx->cached_cons -= nb_pkts;
return 0;
}
- rcvd = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
-
- if (rcvd == 0) {
-#if defined(XDP_USE_NEED_WAKEUP)
- if (xsk_ring_prod__needs_wakeup(fq))
- (void)poll(rxq->fds, 1, 1000);
-#endif
-
- goto out;
- }
-
- for (i = 0; i < rcvd; i++) {
+ for (i = 0; i < nb_pkts; i++) {
const struct xdp_desc *desc;
uint64_t addr;
uint32_t len;
rx_bytes += len;
}
- xsk_ring_cons__release(rx, rcvd);
-
- (void)reserve_fill_queue(umem, rcvd, fq_bufs, fq);
+ xsk_ring_cons__release(rx, nb_pkts);
+ (void)reserve_fill_queue(umem, nb_pkts, fq_bufs, fq);
/* statistics */
- rxq->stats.rx_pkts += rcvd;
+ rxq->stats.rx_pkts += nb_pkts;
rxq->stats.rx_bytes += rx_bytes;
-out:
- if (rcvd != nb_pkts)
- rte_mempool_put_bulk(umem->mb_pool, (void **)&fq_bufs[rcvd],
- nb_pkts - rcvd);
-
- return rcvd;
+ return nb_pkts;
}
#else
static uint16_t
struct xsk_ring_prod *fq = &rxq->fq;
uint32_t idx_rx = 0;
unsigned long rx_bytes = 0;
- int rcvd, i;
+ int i;
uint32_t free_thresh = fq->size >> 1;
struct rte_mbuf *mbufs[ETH_AF_XDP_RX_BATCH_SIZE];
if (xsk_prod_nb_free(fq, free_thresh) >= free_thresh)
- (void)reserve_fill_queue(umem, ETH_AF_XDP_RX_BATCH_SIZE,
- NULL, fq);
+ (void)reserve_fill_queue(umem, nb_pkts, NULL, fq);
- if (unlikely(rte_pktmbuf_alloc_bulk(rxq->mb_pool, mbufs, nb_pkts) != 0))
- return 0;
-
- rcvd = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
- if (rcvd == 0) {
+ nb_pkts = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
+ if (nb_pkts == 0) {
#if defined(XDP_USE_NEED_WAKEUP)
if (xsk_ring_prod__needs_wakeup(fq))
(void)poll(rxq->fds, 1, 1000);
#endif
+ return 0;
+ }
- goto out;
+ if (unlikely(rte_pktmbuf_alloc_bulk(rxq->mb_pool, mbufs, nb_pkts))) {
+ /* rollback cached_cons which is added by
+ * xsk_ring_cons__peek
+ */
+ rx->cached_cons -= nb_pkts;
+ return 0;
}
- for (i = 0; i < rcvd; i++) {
+ for (i = 0; i < nb_pkts; i++) {
const struct xdp_desc *desc;
uint64_t addr;
uint32_t len;
bufs[i] = mbufs[i];
}
- xsk_ring_cons__release(rx, rcvd);
+ xsk_ring_cons__release(rx, nb_pkts);
/* statistics */
- rxq->stats.rx_pkts += rcvd;
+ rxq->stats.rx_pkts += nb_pkts;
rxq->stats.rx_bytes += rx_bytes;
-out:
- if (rcvd != nb_pkts)
- rte_mempool_put_bulk(rxq->mb_pool, (void **)&mbufs[rcvd],
- nb_pkts - rcvd);
-
- return rcvd;
+ return nb_pkts;
}
#endif
static uint16_t
-eth_af_xdp_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
+af_xdp_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{
- nb_pkts = RTE_MIN(nb_pkts, ETH_AF_XDP_RX_BATCH_SIZE);
-
#if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
return af_xdp_rx_zc(queue, bufs, nb_pkts);
#else
#endif
}
+static uint16_t
+eth_af_xdp_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
+{
+ uint16_t nb_rx;
+
+ if (likely(nb_pkts <= ETH_AF_XDP_RX_BATCH_SIZE))
+ return af_xdp_rx(queue, bufs, nb_pkts);
+
+ /* Split larger batch into smaller batches of size
+ * ETH_AF_XDP_RX_BATCH_SIZE or less.
+ */
+ nb_rx = 0;
+ while (nb_pkts) {
+ uint16_t ret, n;
+
+ n = (uint16_t)RTE_MIN(nb_pkts, ETH_AF_XDP_RX_BATCH_SIZE);
+ ret = af_xdp_rx(queue, &bufs[nb_rx], n);
+ nb_rx = (uint16_t)(nb_rx + ret);
+ nb_pkts = (uint16_t)(nb_pkts - ret);
+ if (ret < n)
+ break;
+ }
+
+ return nb_rx;
+}
+
static void
pull_umem_cq(struct xsk_umem_info *umem, int size, struct xsk_ring_cons *cq)
{
pull_umem_cq(umem, XSK_RING_CONS__DEFAULT_NUM_DESCS, cq);
-#if defined(XDP_USE_NEED_WAKEUP)
- if (xsk_ring_prod__needs_wakeup(&txq->tx))
-#endif
+ if (tx_syscall_needed(&txq->tx))
while (send(xsk_socket__fd(txq->pair->xsk), NULL,
0, MSG_DONTWAIT) < 0) {
/* some thing unexpected */
if (!xsk_ring_prod__reserve(&txq->tx, 1, &idx_tx)) {
rte_pktmbuf_free(local_mbuf);
- kick_tx(txq, cq);
goto out;
}
tx_bytes += mbuf->pkt_len;
}
- kick_tx(txq, cq);
-
out:
xsk_ring_prod__submit(&txq->tx, count);
+ kick_tx(txq, cq);
txq->stats.tx_pkts += count;
txq->stats.tx_bytes += tx_bytes;
uint32_t idx_tx;
struct xsk_ring_cons *cq = &txq->pair->cq;
- nb_pkts = RTE_MIN(nb_pkts, ETH_AF_XDP_TX_BATCH_SIZE);
-
pull_umem_cq(umem, nb_pkts, cq);
nb_pkts = rte_ring_dequeue_bulk(umem->buf_ring, addrs,
return nb_pkts;
}
+
+static uint16_t
+af_xdp_tx_cp_batch(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
+{
+ uint16_t nb_tx;
+
+ if (likely(nb_pkts <= ETH_AF_XDP_TX_BATCH_SIZE))
+ return af_xdp_tx_cp(queue, bufs, nb_pkts);
+
+ nb_tx = 0;
+ while (nb_pkts) {
+ uint16_t ret, n;
+
+ /* Split larger batch into smaller batches of size
+ * ETH_AF_XDP_TX_BATCH_SIZE or less.
+ */
+ n = (uint16_t)RTE_MIN(nb_pkts, ETH_AF_XDP_TX_BATCH_SIZE);
+ ret = af_xdp_tx_cp(queue, &bufs[nb_tx], n);
+ nb_tx = (uint16_t)(nb_tx + ret);
+ nb_pkts = (uint16_t)(nb_pkts - ret);
+ if (ret < n)
+ break;
+ }
+
+ return nb_tx;
+}
#endif
static uint16_t
#if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
return af_xdp_tx_zc(queue, bufs, nb_pkts);
#else
- return af_xdp_tx_cp(queue, bufs, nb_pkts);
+ return af_xdp_tx_cp_batch(queue, bufs, nb_pkts);
#endif
}
static int
eth_dev_start(struct rte_eth_dev *dev)
{
- dev->data->dev_link.link_status = ETH_LINK_UP;
+ dev->data->dev_link.link_status = RTE_ETH_LINK_UP;
return 0;
}
static int
eth_dev_stop(struct rte_eth_dev *dev)
{
- dev->data->dev_link.link_status = ETH_LINK_DOWN;
+ dev->data->dev_link.link_status = RTE_ETH_LINK_DOWN;
return 0;
}
return list;
}
-/* Check if the netdev,qid context already exists */
-static inline bool
-ctx_exists(struct pkt_rx_queue *rxq, const char *ifname,
- struct pkt_rx_queue *list_rxq, const char *list_ifname)
-{
- bool exists = false;
-
- if (rxq->xsk_queue_idx == list_rxq->xsk_queue_idx &&
- !strncmp(ifname, list_ifname, IFNAMSIZ)) {
- AF_XDP_LOG(ERR, "ctx %s,%i already exists, cannot share umem\n",
- ifname, rxq->xsk_queue_idx);
- exists = true;
- }
-
- return exists;
-}
-
-/* Get a pointer to an existing UMEM which overlays the rxq's mb_pool */
-static inline int
-get_shared_umem(struct pkt_rx_queue *rxq, const char *ifname,
- struct xsk_umem_info **umem)
-{
- struct internal_list *list;
- struct pmd_internals *internals;
- int i = 0, ret = 0;
- struct rte_mempool *mb_pool = rxq->mb_pool;
-
- if (mb_pool == NULL)
- return ret;
-
- pthread_mutex_lock(&internal_list_lock);
-
- TAILQ_FOREACH(list, &internal_list, next) {
- internals = list->eth_dev->data->dev_private;
- for (i = 0; i < internals->queue_cnt; i++) {
- struct pkt_rx_queue *list_rxq =
- &internals->rx_queues[i];
- if (rxq == list_rxq)
- continue;
- if (mb_pool == internals->rx_queues[i].mb_pool) {
- if (ctx_exists(rxq, ifname, list_rxq,
- internals->if_name)) {
- ret = -1;
- goto out;
- }
- if (__atomic_load_n(
- &internals->rx_queues[i].umem->refcnt,
- __ATOMIC_ACQUIRE)) {
- *umem = internals->rx_queues[i].umem;
- goto out;
- }
- }
- }
- }
-
-out:
- pthread_mutex_unlock(&internal_list_lock);
-
- return ret;
-}
-
static int
eth_dev_configure(struct rte_eth_dev *dev)
{
return 0;
}
+#define CLB_VAL_IDX 0
+static int
+eth_monitor_callback(const uint64_t value,
+ const uint64_t opaque[RTE_POWER_MONITOR_OPAQUE_SZ])
+{
+ const uint64_t v = opaque[CLB_VAL_IDX];
+ const uint64_t m = (uint32_t)~0;
+
+ /* if the value has changed, abort entering power optimized state */
+ return (value & m) == v ? 0 : -1;
+}
+
+static int
+eth_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc)
+{
+ struct pkt_rx_queue *rxq = rx_queue;
+ unsigned int *prod = rxq->rx.producer;
+ const uint32_t cur_val = rxq->rx.cached_prod; /* use cached value */
+
+ /* watch for changes in producer ring */
+ pmc->addr = (void *)prod;
+
+ /* store current value */
+ pmc->opaque[CLB_VAL_IDX] = cur_val;
+ pmc->fn = eth_monitor_callback;
+
+ /* AF_XDP producer ring index is 32-bit */
+ pmc->size = sizeof(uint32_t);
+
+ return 0;
+}
+
static int
eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
{
dev_info->if_index = internals->if_index;
dev_info->max_mac_addrs = 1;
- dev_info->max_rx_pktlen = ETH_FRAME_LEN;
dev_info->max_rx_queues = internals->queue_cnt;
dev_info->max_tx_queues = internals->queue_cnt;
dev_info->min_mtu = RTE_ETHER_MIN_MTU;
#if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
- dev_info->max_mtu = getpagesize() -
- sizeof(struct rte_mempool_objhdr) -
- sizeof(struct rte_mbuf) -
- RTE_PKTMBUF_HEADROOM - XDP_PACKET_HEADROOM;
+ dev_info->max_rx_pktlen = getpagesize() -
+ sizeof(struct rte_mempool_objhdr) -
+ sizeof(struct rte_mbuf) -
+ RTE_PKTMBUF_HEADROOM - XDP_PACKET_HEADROOM;
#else
- dev_info->max_mtu = ETH_AF_XDP_FRAME_SIZE - XDP_PACKET_HEADROOM;
+ dev_info->max_rx_pktlen = ETH_AF_XDP_FRAME_SIZE - XDP_PACKET_HEADROOM;
#endif
+ dev_info->max_mtu = dev_info->max_rx_pktlen - ETH_AF_XDP_ETH_OVERHEAD;
+ dev_info->default_rxportconf.burst_size = ETH_AF_XDP_DFLT_BUSY_BUDGET;
+ dev_info->default_txportconf.burst_size = ETH_AF_XDP_DFLT_BUSY_BUDGET;
dev_info->default_rxportconf.nb_queues = 1;
dev_info->default_txportconf.nb_queues = 1;
dev_info->default_rxportconf.ring_size = ETH_AF_XDP_DFLT_NUM_DESCS;
eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
{
struct pmd_internals *internals = dev->data->dev_private;
+ struct pmd_process_private *process_private = dev->process_private;
struct xdp_statistics xdp_stats;
struct pkt_rx_queue *rxq;
struct pkt_tx_queue *txq;
socklen_t optlen;
- int i, ret;
+ int i, ret, fd;
for (i = 0; i < dev->data->nb_rx_queues; i++) {
optlen = sizeof(struct xdp_statistics);
stats->ibytes += stats->q_ibytes[i];
stats->imissed += rxq->stats.rx_dropped;
stats->oerrors += txq->stats.tx_dropped;
- ret = getsockopt(xsk_socket__fd(rxq->xsk), SOL_XDP,
- XDP_STATISTICS, &xdp_stats, &optlen);
+ fd = process_private->rxq_xsk_fds[i];
+ ret = fd >= 0 ? getsockopt(fd, SOL_XDP, XDP_STATISTICS,
+ &xdp_stats, &optlen) : -1;
if (ret != 0) {
AF_XDP_LOG(ERR, "getsockopt() failed for XDP_STATISTICS.\n");
return -1;
#endif
rte_free(umem);
- umem = NULL;
}
static int
int i;
if (rte_eal_process_type() != RTE_PROC_PRIMARY)
- return 0;
+ goto out;
AF_XDP_LOG(INFO, "Closing AF_XDP ethdev on numa socket %u\n",
rte_socket_id());
}
}
- return 0;
-}
+out:
+ rte_free(dev->process_private);
-static void
-eth_queue_release(void *q __rte_unused)
-{
+ return 0;
}
static int
}
#if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
-static inline uint64_t get_base_addr(struct rte_mempool *mp, uint64_t *align)
+static inline uintptr_t get_base_addr(struct rte_mempool *mp, uint64_t *align)
{
struct rte_mempool_memhdr *memhdr;
- uint64_t memhdr_addr, aligned_addr;
+ uintptr_t memhdr_addr, aligned_addr;
memhdr = STAILQ_FIRST(&mp->mem_list);
- memhdr_addr = (uint64_t)memhdr->addr;
+ memhdr_addr = (uintptr_t)memhdr->addr;
aligned_addr = memhdr_addr & ~(getpagesize() - 1);
*align = memhdr_addr - aligned_addr;
return aligned_addr;
}
+/* Check if the netdev,qid context already exists */
+static inline bool
+ctx_exists(struct pkt_rx_queue *rxq, const char *ifname,
+ struct pkt_rx_queue *list_rxq, const char *list_ifname)
+{
+ bool exists = false;
+
+ if (rxq->xsk_queue_idx == list_rxq->xsk_queue_idx &&
+ !strncmp(ifname, list_ifname, IFNAMSIZ)) {
+ AF_XDP_LOG(ERR, "ctx %s,%i already exists, cannot share umem\n",
+ ifname, rxq->xsk_queue_idx);
+ exists = true;
+ }
+
+ return exists;
+}
+
+/* Get a pointer to an existing UMEM which overlays the rxq's mb_pool */
+static inline int
+get_shared_umem(struct pkt_rx_queue *rxq, const char *ifname,
+ struct xsk_umem_info **umem)
+{
+ struct internal_list *list;
+ struct pmd_internals *internals;
+ int i = 0, ret = 0;
+ struct rte_mempool *mb_pool = rxq->mb_pool;
+
+ if (mb_pool == NULL)
+ return ret;
+
+ pthread_mutex_lock(&internal_list_lock);
+
+ TAILQ_FOREACH(list, &internal_list, next) {
+ internals = list->eth_dev->data->dev_private;
+ for (i = 0; i < internals->queue_cnt; i++) {
+ struct pkt_rx_queue *list_rxq =
+ &internals->rx_queues[i];
+ if (rxq == list_rxq)
+ continue;
+ if (mb_pool == internals->rx_queues[i].mb_pool) {
+ if (ctx_exists(rxq, ifname, list_rxq,
+ internals->if_name)) {
+ ret = -1;
+ goto out;
+ }
+ if (__atomic_load_n(&internals->rx_queues[i].umem->refcnt,
+ __ATOMIC_ACQUIRE)) {
+ *umem = internals->rx_queues[i].umem;
+ goto out;
+ }
+ }
+ }
+ }
+
+out:
+ pthread_mutex_unlock(&internal_list_lock);
+
+ return ret;
+}
+
static struct
xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals,
struct pkt_rx_queue *rxq)
umem = rte_zmalloc_socket("umem", sizeof(*umem), 0,
rte_socket_id());
if (umem == NULL) {
- AF_XDP_LOG(ERR, "Failed to allocate umem info");
+ AF_XDP_LOG(ERR, "Failed to allocate umem info\n");
return NULL;
}
umem->mb_pool = mb_pool;
base_addr = (void *)get_base_addr(mb_pool, &align);
- umem_size = mb_pool->populated_size * usr_config.frame_size +
+ umem_size = (uint64_t)mb_pool->populated_size *
+ (uint64_t)usr_config.frame_size +
align;
ret = xsk_umem__create(&umem->umem, base_addr, umem_size,
&rxq->fq, &rxq->cq, &usr_config);
if (ret) {
- AF_XDP_LOG(ERR, "Failed to create umem");
+ AF_XDP_LOG(ERR, "Failed to create umem\n");
goto err;
}
umem->buffer = base_addr;
__atomic_store_n(&umem->refcnt, 1, __ATOMIC_RELEASE);
}
+ return umem;
+
+err:
+ xdp_umem_destroy(umem);
+ return NULL;
+}
#else
static struct
xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals,
umem = rte_zmalloc_socket("umem", sizeof(*umem), 0, rte_socket_id());
if (umem == NULL) {
- AF_XDP_LOG(ERR, "Failed to allocate umem info");
+ AF_XDP_LOG(ERR, "Failed to allocate umem info\n");
return NULL;
}
&usr_config);
if (ret) {
- AF_XDP_LOG(ERR, "Failed to create umem");
+ AF_XDP_LOG(ERR, "Failed to create umem\n");
goto err;
}
umem->mz = mz;
-#endif
return umem;
err:
xdp_umem_destroy(umem);
return NULL;
}
+#endif
static int
-load_custom_xdp_prog(const char *prog_path, int if_index)
+load_custom_xdp_prog(const char *prog_path, int if_index, struct bpf_map **map)
{
- int ret, prog_fd = -1;
+ int ret, prog_fd;
struct bpf_object *obj;
- struct bpf_map *map;
- ret = bpf_prog_load(prog_path, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
- if (ret) {
+ prog_fd = load_program(prog_path, &obj);
+ if (prog_fd < 0) {
AF_XDP_LOG(ERR, "Failed to load program %s\n", prog_path);
- return ret;
+ return -1;
}
/*
* The loaded program must provision for a map of xsks, such that some
- * traffic can be redirected to userspace. When the xsk is created,
- * libbpf inserts it into the map.
+ * traffic can be redirected to userspace.
*/
- map = bpf_object__find_map_by_name(obj, "xsks_map");
- if (!map) {
+ *map = bpf_object__find_map_by_name(obj, "xsks_map");
+ if (!*map) {
AF_XDP_LOG(ERR, "Failed to find xsks_map in %s\n", prog_path);
return -1;
}
return 0;
}
+/* Detect support for busy polling through setsockopt(). */
+static int
+configure_preferred_busy_poll(struct pkt_rx_queue *rxq)
+{
+ int sock_opt = 1;
+ int fd = xsk_socket__fd(rxq->xsk);
+ int ret = 0;
+
+ ret = setsockopt(fd, SOL_SOCKET, SO_PREFER_BUSY_POLL,
+ (void *)&sock_opt, sizeof(sock_opt));
+ if (ret < 0) {
+ AF_XDP_LOG(DEBUG, "Failed to set SO_PREFER_BUSY_POLL\n");
+ goto err_prefer;
+ }
+
+ sock_opt = ETH_AF_XDP_DFLT_BUSY_TIMEOUT;
+ ret = setsockopt(fd, SOL_SOCKET, SO_BUSY_POLL, (void *)&sock_opt,
+ sizeof(sock_opt));
+ if (ret < 0) {
+ AF_XDP_LOG(DEBUG, "Failed to set SO_BUSY_POLL\n");
+ goto err_timeout;
+ }
+
+ sock_opt = rxq->busy_budget;
+ ret = setsockopt(fd, SOL_SOCKET, SO_BUSY_POLL_BUDGET,
+ (void *)&sock_opt, sizeof(sock_opt));
+ if (ret < 0) {
+ AF_XDP_LOG(DEBUG, "Failed to set SO_BUSY_POLL_BUDGET\n");
+ } else {
+ AF_XDP_LOG(INFO, "Busy polling budget set to: %u\n",
+ rxq->busy_budget);
+ return 0;
+ }
+
+ /* setsockopt failure - attempt to restore xsk to default state and
+ * proceed without busy polling support.
+ */
+ sock_opt = 0;
+ ret = setsockopt(fd, SOL_SOCKET, SO_BUSY_POLL, (void *)&sock_opt,
+ sizeof(sock_opt));
+ if (ret < 0) {
+ AF_XDP_LOG(ERR, "Failed to unset SO_BUSY_POLL\n");
+ return -1;
+ }
+
+err_timeout:
+ sock_opt = 0;
+ ret = setsockopt(fd, SOL_SOCKET, SO_PREFER_BUSY_POLL,
+ (void *)&sock_opt, sizeof(sock_opt));
+ if (ret < 0) {
+ AF_XDP_LOG(ERR, "Failed to unset SO_PREFER_BUSY_POLL\n");
+ return -1;
+ }
+
+err_prefer:
+ rxq->busy_budget = 0;
+ return 0;
+}
+
static int
xsk_configure(struct pmd_internals *internals, struct pkt_rx_queue *rxq,
int ring_size)
int ret = 0;
int reserve_size = ETH_AF_XDP_DFLT_NUM_DESCS;
struct rte_mbuf *fq_bufs[reserve_size];
+ bool reserve_before;
rxq->umem = xdp_umem_configure(internals, rxq);
if (rxq->umem == NULL)
return -ENOMEM;
txq->umem = rxq->umem;
+ reserve_before = __atomic_load_n(&rxq->umem->refcnt, __ATOMIC_ACQUIRE) <= 1;
+
+#if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
+ ret = rte_pktmbuf_alloc_bulk(rxq->umem->mb_pool, fq_bufs, reserve_size);
+ if (ret) {
+ AF_XDP_LOG(DEBUG, "Failed to get enough buffers for fq.\n");
+ goto out_umem;
+ }
+#endif
+
+ /* reserve fill queue of queues not (yet) sharing UMEM */
+ if (reserve_before) {
+ ret = reserve_fill_queue(rxq->umem, reserve_size, fq_bufs, &rxq->fq);
+ if (ret) {
+ AF_XDP_LOG(ERR, "Failed to reserve fill queue.\n");
+ goto out_umem;
+ }
+ }
cfg.rx_size = ring_size;
cfg.tx_size = ring_size;
cfg.bind_flags |= XDP_USE_NEED_WAKEUP;
#endif
- if (strnlen(internals->prog_path, PATH_MAX) &&
- !internals->custom_prog_configured) {
- ret = load_custom_xdp_prog(internals->prog_path,
- internals->if_index);
- if (ret) {
- AF_XDP_LOG(ERR, "Failed to load custom XDP program %s\n",
- internals->prog_path);
- goto err;
+ if (strnlen(internals->prog_path, PATH_MAX)) {
+ if (!internals->custom_prog_configured) {
+ ret = load_custom_xdp_prog(internals->prog_path,
+ internals->if_index,
+ &internals->map);
+ if (ret) {
+ AF_XDP_LOG(ERR, "Failed to load custom XDP program %s\n",
+ internals->prog_path);
+ goto out_umem;
+ }
+ internals->custom_prog_configured = 1;
}
- internals->custom_prog_configured = 1;
+ cfg.libbpf_flags |= XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
}
if (internals->shared_umem)
if (ret) {
AF_XDP_LOG(ERR, "Failed to create xsk socket.\n");
- goto err;
+ goto out_umem;
}
-#if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
- if (rte_pktmbuf_alloc_bulk(rxq->umem->mb_pool, fq_bufs, reserve_size)) {
- AF_XDP_LOG(DEBUG, "Failed to get enough buffers for fq.\n");
- goto err;
+ if (!reserve_before) {
+ /* reserve fill queue of queues sharing UMEM */
+ ret = reserve_fill_queue(rxq->umem, reserve_size, fq_bufs, &rxq->fq);
+ if (ret) {
+ AF_XDP_LOG(ERR, "Failed to reserve fill queue.\n");
+ goto out_xsk;
+ }
}
-#endif
- ret = reserve_fill_queue(rxq->umem, reserve_size, fq_bufs, &rxq->fq);
- if (ret) {
- xsk_socket__delete(rxq->xsk);
- AF_XDP_LOG(ERR, "Failed to reserve fill queue.\n");
- goto err;
+
+ /* insert the xsk into the xsks_map */
+ if (internals->custom_prog_configured) {
+ int err, fd;
+
+ fd = xsk_socket__fd(rxq->xsk);
+ err = bpf_map_update_elem(bpf_map__fd(internals->map),
+ &rxq->xsk_queue_idx, &fd, 0);
+ if (err) {
+ AF_XDP_LOG(ERR, "Failed to insert xsk in map.\n");
+ goto out_xsk;
+ }
+ }
+
+ if (rxq->busy_budget) {
+ ret = configure_preferred_busy_poll(rxq);
+ if (ret) {
+ AF_XDP_LOG(ERR, "Failed configure busy polling.\n");
+ goto out_xsk;
+ }
}
return 0;
-err:
+out_xsk:
+ xsk_socket__delete(rxq->xsk);
+out_umem:
if (__atomic_sub_fetch(&rxq->umem->refcnt, 1, __ATOMIC_ACQUIRE) == 0)
xdp_umem_destroy(rxq->umem);
struct rte_mempool *mb_pool)
{
struct pmd_internals *internals = dev->data->dev_private;
+ struct pmd_process_private *process_private = dev->process_private;
struct pkt_rx_queue *rxq;
int ret;
goto err;
}
+ if (!rxq->busy_budget)
+ AF_XDP_LOG(DEBUG, "Preferred busy polling not enabled\n");
+
rxq->fds[0].fd = xsk_socket__fd(rxq->xsk);
rxq->fds[0].events = POLLIN;
+ process_private->rxq_xsk_fds[rx_queue_id] = rxq->fds[0].fd;
+
dev->data->rx_queues[rx_queue_id] = rxq;
return 0;
.promiscuous_disable = eth_dev_promiscuous_disable,
.rx_queue_setup = eth_rx_queue_setup,
.tx_queue_setup = eth_tx_queue_setup,
- .rx_queue_release = eth_queue_release,
- .tx_queue_release = eth_queue_release,
.link_update = eth_link_update,
.stats_get = eth_stats_get,
.stats_reset = eth_stats_reset,
+ .get_monitor_addr = eth_get_monitor_addr,
};
+/** parse busy_budget argument */
+static int
+parse_budget_arg(const char *key __rte_unused,
+ const char *value, void *extra_args)
+{
+ int *i = (int *)extra_args;
+ char *end;
+
+ *i = strtol(value, &end, 10);
+ if (*i < 0 || *i > UINT16_MAX) {
+ AF_XDP_LOG(ERR, "Invalid busy_budget %i, must be >= 0 and <= %u\n",
+ *i, UINT16_MAX);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
/** parse integer from integer argument */
static int
parse_integer_arg(const char *key __rte_unused,
static int
parse_parameters(struct rte_kvargs *kvlist, char *if_name, int *start_queue,
- int *queue_cnt, int *shared_umem, char *prog_path)
+ int *queue_cnt, int *shared_umem, char *prog_path,
+ int *busy_budget)
{
int ret;
if (ret < 0)
goto free_kvlist;
+ ret = rte_kvargs_process(kvlist, ETH_AF_XDP_BUDGET_ARG,
+ &parse_budget_arg, busy_budget);
+ if (ret < 0)
+ goto free_kvlist;
+
free_kvlist:
rte_kvargs_free(kvlist);
return ret;
static struct rte_eth_dev *
init_internals(struct rte_vdev_device *dev, const char *if_name,
int start_queue_idx, int queue_cnt, int shared_umem,
- const char *prog_path)
+ const char *prog_path, int busy_budget)
{
const char *name = rte_vdev_device_name(dev);
const unsigned int numa_node = dev->device.numa_node;
+ struct pmd_process_private *process_private;
struct pmd_internals *internals;
struct rte_eth_dev *eth_dev;
int ret;
internals->rx_queues[i].pair = &internals->tx_queues[i];
internals->rx_queues[i].xsk_queue_idx = start_queue_idx + i;
internals->tx_queues[i].xsk_queue_idx = start_queue_idx + i;
+ internals->rx_queues[i].busy_budget = busy_budget;
}
ret = get_iface_info(if_name, &internals->eth_addr,
if (ret)
goto err_free_tx;
+ process_private = (struct pmd_process_private *)
+ rte_zmalloc_socket(name, sizeof(struct pmd_process_private),
+ RTE_CACHE_LINE_SIZE, numa_node);
+ if (process_private == NULL) {
+ AF_XDP_LOG(ERR, "Failed to alloc memory for process private\n");
+ goto err_free_tx;
+ }
+
eth_dev = rte_eth_vdev_allocate(dev, 0);
if (eth_dev == NULL)
- goto err_free_tx;
+ goto err_free_pp;
eth_dev->data->dev_private = internals;
eth_dev->data->dev_link = pmd_link;
eth_dev->dev_ops = &ops;
eth_dev->rx_pkt_burst = eth_af_xdp_rx;
eth_dev->tx_pkt_burst = eth_af_xdp_tx;
+ eth_dev->process_private = process_private;
+
+ for (i = 0; i < queue_cnt; i++)
+ process_private->rxq_xsk_fds[i] = -1;
#if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
AF_XDP_LOG(INFO, "Zero copy between umem and mbuf enabled.\n");
return eth_dev;
+err_free_pp:
+ rte_free(process_private);
err_free_tx:
rte_free(internals->tx_queues);
err_free_rx:
return NULL;
}
+/* Secondary process requests rxq fds from primary. */
+static int
+afxdp_mp_request_fds(const char *name, struct rte_eth_dev *dev)
+{
+ struct pmd_process_private *process_private = dev->process_private;
+ struct timespec timeout = {.tv_sec = 1, .tv_nsec = 0};
+ struct rte_mp_msg request, *reply;
+ struct rte_mp_reply replies;
+ struct ipc_hdr *request_param = (struct ipc_hdr *)request.param;
+ int i, ret;
+
+ /* Prepare the request */
+ memset(&request, 0, sizeof(request));
+ strlcpy(request.name, ETH_AF_XDP_MP_KEY, sizeof(request.name));
+ strlcpy(request_param->port_name, name,
+ sizeof(request_param->port_name));
+ request.len_param = sizeof(*request_param);
+
+ /* Send the request and receive the reply */
+ AF_XDP_LOG(DEBUG, "Sending multi-process IPC request for %s\n", name);
+ ret = rte_mp_request_sync(&request, &replies, &timeout);
+ if (ret < 0 || replies.nb_received != 1) {
+ AF_XDP_LOG(ERR, "Failed to request fds from primary: %d\n",
+ rte_errno);
+ return -1;
+ }
+ reply = replies.msgs;
+ AF_XDP_LOG(DEBUG, "Received multi-process IPC reply for %s\n", name);
+ if (dev->data->nb_rx_queues != reply->num_fds) {
+ AF_XDP_LOG(ERR, "Incorrect number of fds received: %d != %d\n",
+ reply->num_fds, dev->data->nb_rx_queues);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < reply->num_fds; i++)
+ process_private->rxq_xsk_fds[i] = reply->fds[i];
+
+ free(reply);
+ return 0;
+}
+
+/* Primary process sends rxq fds to secondary. */
+static int
+afxdp_mp_send_fds(const struct rte_mp_msg *request, const void *peer)
+{
+ struct rte_eth_dev *dev;
+ struct pmd_process_private *process_private;
+ struct rte_mp_msg reply;
+ const struct ipc_hdr *request_param =
+ (const struct ipc_hdr *)request->param;
+ struct ipc_hdr *reply_param =
+ (struct ipc_hdr *)reply.param;
+ const char *request_name = request_param->port_name;
+ int i;
+
+ AF_XDP_LOG(DEBUG, "Received multi-process IPC request for %s\n",
+ request_name);
+
+ /* Find the requested port */
+ dev = rte_eth_dev_get_by_name(request_name);
+ if (!dev) {
+ AF_XDP_LOG(ERR, "Failed to get port id for %s\n", request_name);
+ return -1;
+ }
+ process_private = dev->process_private;
+
+ /* Populate the reply with the xsk fd for each queue */
+ reply.num_fds = 0;
+ if (dev->data->nb_rx_queues > RTE_MP_MAX_FD_NUM) {
+ AF_XDP_LOG(ERR, "Number of rx queues (%d) exceeds max number of fds (%d)\n",
+ dev->data->nb_rx_queues, RTE_MP_MAX_FD_NUM);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < dev->data->nb_rx_queues; i++)
+ reply.fds[reply.num_fds++] = process_private->rxq_xsk_fds[i];
+
+ /* Send the reply */
+ strlcpy(reply.name, request->name, sizeof(reply.name));
+ strlcpy(reply_param->port_name, request_name,
+ sizeof(reply_param->port_name));
+ reply.len_param = sizeof(*reply_param);
+ AF_XDP_LOG(DEBUG, "Sending multi-process IPC reply for %s\n",
+ reply_param->port_name);
+ if (rte_mp_reply(&reply, peer) < 0) {
+ AF_XDP_LOG(ERR, "Failed to reply to multi-process IPC request\n");
+ return -1;
+ }
+ return 0;
+}
+
static int
rte_pmd_af_xdp_probe(struct rte_vdev_device *dev)
{
int xsk_queue_cnt = ETH_AF_XDP_DFLT_QUEUE_COUNT;
int shared_umem = 0;
char prog_path[PATH_MAX] = {'\0'};
+ int busy_budget = -1, ret;
struct rte_eth_dev *eth_dev = NULL;
- const char *name;
+ const char *name = rte_vdev_device_name(dev);
- AF_XDP_LOG(INFO, "Initializing pmd_af_xdp for %s\n",
- rte_vdev_device_name(dev));
+ AF_XDP_LOG(INFO, "Initializing pmd_af_xdp for %s\n", name);
- name = rte_vdev_device_name(dev);
- if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
- strlen(rte_vdev_device_args(dev)) == 0) {
+ if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
eth_dev = rte_eth_dev_attach_secondary(name);
if (eth_dev == NULL) {
AF_XDP_LOG(ERR, "Failed to probe %s\n", name);
return -EINVAL;
}
eth_dev->dev_ops = &ops;
+ eth_dev->device = &dev->device;
+ eth_dev->rx_pkt_burst = rte_eth_pkt_burst_dummy;
+ eth_dev->tx_pkt_burst = rte_eth_pkt_burst_dummy;
+ eth_dev->process_private = (struct pmd_process_private *)
+ rte_zmalloc_socket(name,
+ sizeof(struct pmd_process_private),
+ RTE_CACHE_LINE_SIZE,
+ eth_dev->device->numa_node);
+ if (eth_dev->process_private == NULL) {
+ AF_XDP_LOG(ERR,
+ "Failed to alloc memory for process private\n");
+ return -ENOMEM;
+ }
+
+ /* Obtain the xsk fds from the primary process. */
+ if (afxdp_mp_request_fds(name, eth_dev))
+ return -1;
+
rte_eth_dev_probing_finish(eth_dev);
return 0;
}
dev->device.numa_node = rte_socket_id();
if (parse_parameters(kvlist, if_name, &xsk_start_queue_idx,
- &xsk_queue_cnt, &shared_umem, prog_path) < 0) {
+ &xsk_queue_cnt, &shared_umem, prog_path,
+ &busy_budget) < 0) {
AF_XDP_LOG(ERR, "Invalid kvargs value\n");
return -EINVAL;
}
return -EINVAL;
}
+ busy_budget = busy_budget == -1 ? ETH_AF_XDP_DFLT_BUSY_BUDGET :
+ busy_budget;
+
eth_dev = init_internals(dev, if_name, xsk_start_queue_idx,
- xsk_queue_cnt, shared_umem, prog_path);
+ xsk_queue_cnt, shared_umem, prog_path,
+ busy_budget);
if (eth_dev == NULL) {
AF_XDP_LOG(ERR, "Failed to init internals\n");
return -1;
}
+ /* Register IPC callback which shares xsk fds from primary to secondary */
+ if (!afxdp_dev_count) {
+ ret = rte_mp_action_register(ETH_AF_XDP_MP_KEY, afxdp_mp_send_fds);
+ if (ret < 0 && rte_errno != ENOTSUP) {
+ AF_XDP_LOG(ERR, "%s: Failed to register multi-process IPC callback: %s\n",
+ name, strerror(rte_errno));
+ return -1;
+ }
+ }
+ afxdp_dev_count++;
+
rte_eth_dev_probing_finish(eth_dev);
return 0;
return 0;
eth_dev_close(eth_dev);
+ if (afxdp_dev_count == 1)
+ rte_mp_action_unregister(ETH_AF_XDP_MP_KEY);
+ afxdp_dev_count--;
rte_eth_dev_release_port(eth_dev);
-
return 0;
}
"start_queue=<int> "
"queue_count=<int> "
"shared_umem=<int> "
- "xdp_prog=<string> ");
+ "xdp_prog=<string> "
+ "busy_budget=<int>");
git.droids-corp.org / dpdk.git / blobdiff