#include <rte_ip.h>
#include <rte_string_fns.h>
+#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#define ETH_TAP_CMP_MAC_FMT "0123456789ABCDEFabcdef"
#define ETH_TAP_MAC_ARG_FMT ETH_TAP_MAC_FIXED "|" ETH_TAP_USR_MAC_FMT
+#define TAP_GSO_MBUFS_PER_CORE 128
+#define TAP_GSO_MBUF_SEG_SIZE 128
+#define TAP_GSO_MBUF_CACHE_SIZE 4
+#define TAP_GSO_MBUFS_NUM \
+ (TAP_GSO_MBUFS_PER_CORE * TAP_GSO_MBUF_CACHE_SIZE)
+
static struct rte_vdev_driver pmd_tap_drv;
static struct rte_vdev_driver pmd_tun_drv;
return DEV_TX_OFFLOAD_MULTI_SEGS |
DEV_TX_OFFLOAD_IPV4_CKSUM |
DEV_TX_OFFLOAD_UDP_CKSUM |
- DEV_TX_OFFLOAD_TCP_CKSUM;
+ DEV_TX_OFFLOAD_TCP_CKSUM |
+ DEV_TX_OFFLOAD_TCP_TSO;
}
/* Finalize l4 checksum calculation */
}
}
-/* Callback to handle sending packets from the tap interface
- */
-static uint16_t
-pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
+static inline void
+tap_write_mbufs(struct tx_queue *txq, uint16_t num_mbufs,
+ struct rte_mbuf **pmbufs,
+ uint16_t *num_packets, unsigned long *num_tx_bytes)
{
- struct tx_queue *txq = queue;
- uint16_t num_tx = 0;
- unsigned long num_tx_bytes = 0;
- uint32_t max_size;
int i;
+ uint16_t l234_hlen;
- if (unlikely(nb_pkts == 0))
- return 0;
-
- max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
- for (i = 0; i < nb_pkts; i++) {
- struct rte_mbuf *mbuf = bufs[num_tx];
+ for (i = 0; i < num_mbufs; i++) {
+ struct rte_mbuf *mbuf = pmbufs[i];
struct iovec iovecs[mbuf->nb_segs + 2];
struct tun_pi pi = { .flags = 0, .proto = 0x00 };
struct rte_mbuf *seg = mbuf;
int proto;
int n;
int j;
- int k; /* first index in iovecs for copying segments */
- uint16_t l234_hlen; /* length of layers 2,3,4 headers */
+ int k; /* current index in iovecs for copying segments */
uint16_t seg_len; /* length of first segment */
uint16_t nb_segs;
uint16_t *l4_cksum; /* l4 checksum (pseudo header + payload) */
uint16_t l4_phdr_cksum = 0; /* TCP/UDP pseudo header checksum */
uint16_t is_cksum = 0; /* in case cksum should be offloaded */
- /* stats.errs will be incremented */
- if (rte_pktmbuf_pkt_len(mbuf) > max_size)
- break;
-
l4_cksum = NULL;
if (txq->type == ETH_TUNTAP_TYPE_TUN) {
/*
if (seg_len < l234_hlen)
break;
- /* To change checksums, work on a
- * copy of l2, l3 l4 headers.
+ /* To change checksums, work on a * copy of l2, l3
+ * headers + l4 pseudo header
*/
rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *),
l234_hlen);
n = writev(txq->fd, iovecs, j);
if (n <= 0)
break;
+ (*num_packets)++;
+ (*num_tx_bytes) += rte_pktmbuf_pkt_len(mbuf);
+ }
+}
+
+/* Callback to handle sending packets from the tap interface
+ */
+static uint16_t
+pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
+{
+ struct tx_queue *txq = queue;
+ uint16_t num_tx = 0;
+ uint16_t num_packets = 0;
+ unsigned long num_tx_bytes = 0;
+ uint32_t max_size;
+ int i;
+
+ if (unlikely(nb_pkts == 0))
+ return 0;
+ struct rte_mbuf *gso_mbufs[MAX_GSO_MBUFS];
+ max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
+ for (i = 0; i < nb_pkts; i++) {
+ struct rte_mbuf *mbuf_in = bufs[num_tx];
+ struct rte_mbuf **mbuf;
+ uint16_t num_mbufs = 0;
+ uint16_t tso_segsz = 0;
+ int ret;
+ uint16_t hdrs_len;
+ int j;
+ uint64_t tso;
+
+ tso = mbuf_in->ol_flags & PKT_TX_TCP_SEG;
+ if (tso) {
+ struct rte_gso_ctx *gso_ctx = &txq->gso_ctx;
+
+ assert(gso_ctx != NULL);
+
+ /* TCP segmentation implies TCP checksum offload */
+ mbuf_in->ol_flags |= PKT_TX_TCP_CKSUM;
+
+ /* gso size is calculated without ETHER_CRC_LEN */
+ hdrs_len = mbuf_in->l2_len + mbuf_in->l3_len +
+ mbuf_in->l4_len;
+ tso_segsz = mbuf_in->tso_segsz + hdrs_len;
+ if (unlikely(tso_segsz == hdrs_len) ||
+ tso_segsz > *txq->mtu) {
+ txq->stats.errs++;
+ break;
+ }
+ gso_ctx->gso_size = tso_segsz;
+ ret = rte_gso_segment(mbuf_in, /* packet to segment */
+ gso_ctx, /* gso control block */
+ (struct rte_mbuf **)&gso_mbufs, /* out mbufs */
+ RTE_DIM(gso_mbufs)); /* max tso mbufs */
+
+ /* ret contains the number of new created mbufs */
+ if (ret < 0)
+ break;
+
+ mbuf = gso_mbufs;
+ num_mbufs = ret;
+ } else {
+ /* stats.errs will be incremented */
+ if (rte_pktmbuf_pkt_len(mbuf_in) > max_size)
+ break;
+
+ /* ret 0 indicates no new mbufs were created */
+ ret = 0;
+ mbuf = &mbuf_in;
+ num_mbufs = 1;
+ }
+
+ tap_write_mbufs(txq, num_mbufs, mbuf,
+ &num_packets, &num_tx_bytes);
num_tx++;
- num_tx_bytes += mbuf->pkt_len;
- rte_pktmbuf_free(mbuf);
+ /* free original mbuf */
+ rte_pktmbuf_free(mbuf_in);
+ /* free tso mbufs */
+ for (j = 0; j < ret; j++)
+ rte_pktmbuf_free(mbuf[j]);
}
- txq->stats.opackets += num_tx;
+ txq->stats.opackets += num_packets;
txq->stats.errs += nb_pkts - num_tx;
txq->stats.obytes += num_tx_bytes;
return 0;
}
+static int
+tap_gso_ctx_setup(struct rte_gso_ctx *gso_ctx, struct rte_eth_dev *dev)
+{
+ uint32_t gso_types;
+ char pool_name[64];
+
+ /*
+ * Create private mbuf pool with TAP_GSO_MBUF_SEG_SIZE bytes
+ * size per mbuf use this pool for both direct and indirect mbufs
+ */
+
+ struct rte_mempool *mp; /* Mempool for GSO packets */
+
+ /* initialize GSO context */
+ gso_types = DEV_TX_OFFLOAD_TCP_TSO;
+ snprintf(pool_name, sizeof(pool_name), "mp_%s", dev->device->name);
+ mp = rte_mempool_lookup((const char *)pool_name);
+ if (!mp) {
+ mp = rte_pktmbuf_pool_create(pool_name, TAP_GSO_MBUFS_NUM,
+ TAP_GSO_MBUF_CACHE_SIZE, 0,
+ RTE_PKTMBUF_HEADROOM + TAP_GSO_MBUF_SEG_SIZE,
+ SOCKET_ID_ANY);
+ if (!mp) {
+ struct pmd_internals *pmd = dev->data->dev_private;
+ RTE_LOG(DEBUG, PMD, "%s: failed to create mbuf pool for device %s\n",
+ pmd->name, dev->device->name);
+ return -1;
+ }
+ }
+
+ gso_ctx->direct_pool = mp;
+ gso_ctx->indirect_pool = mp;
+ gso_ctx->gso_types = gso_types;
+ gso_ctx->gso_size = 0; /* gso_size is set in tx_burst() per packet */
+ gso_ctx->flag = 0;
+
+ return 0;
+}
+
static int
tap_setup_queue(struct rte_eth_dev *dev,
struct pmd_internals *internals,
uint16_t qid,
int is_rx)
{
+ int ret;
int *fd;
int *other_fd;
const char *dir;
struct pmd_internals *pmd = dev->data->dev_private;
struct rx_queue *rx = &internals->rxq[qid];
struct tx_queue *tx = &internals->txq[qid];
+ struct rte_gso_ctx *gso_ctx;
if (is_rx) {
fd = &rx->fd;
other_fd = &tx->fd;
dir = "rx";
+ gso_ctx = NULL;
} else {
fd = &tx->fd;
other_fd = &rx->fd;
dir = "tx";
+ gso_ctx = &tx->gso_ctx;
}
if (*fd != -1) {
/* fd for this queue already exists */
TAP_LOG(DEBUG, "%s: fd %d for %s queue qid %d exists",
pmd->name, *fd, dir, qid);
+ gso_ctx = NULL;
} else if (*other_fd != -1) {
/* Only other_fd exists. dup it */
*fd = dup(*other_fd);
tx->mtu = &dev->data->mtu;
rx->rxmode = &dev->data->dev_conf.rxmode;
+ if (gso_ctx) {
+ ret = tap_gso_ctx_setup(gso_ctx, dev);
+ if (ret)
+ return -1;
+ }
tx->type = pmd->type;
git.droids-corp.org / dpdk.git / commitdiff