/***************************************************************************
* The recieve thread doesn't transmit packets. Instead, it queues them
* up on the transmit thread. Every so often, the transmit thread needs
* to flush this transmit queue and send everything.
*
* This is an inherent design issue trying to send things as batches rather
* than individually. It increases latency, but increases performance. We
* don't really care about latency.
***************************************************************************/
void
flush_packets(struct Adapter *adapter,
PACKET_QUEUE *packet_buffers,
PACKET_QUEUE *transmit_queue,
struct Throttler *throttler, uint64_t *packets_sent)
{
uint64_t batch_size;
unsigned is_queue_empty = 0;
while (!is_queue_empty) {
/*
* Only send a few packets at a time, throttled according to the max
* --max-rate set by the user
*/
batch_size = throttler_next_batch(throttler, *packets_sent);
/*
* Send a batch of queued packets
*/
for ( ; batch_size; batch_size--) {
int err;
struct PacketBuffer *p;
/*
* Get the next packet from the transmit queue. This packet was
* put there by a receive thread, and will contain things like
* an ACK or an HTTP request
*/
err = rte_ring_sc_dequeue(transmit_queue, (void**)&p);
if (err) {
is_queue_empty = 1;
break; /* queue is empty, nothing to send */
}
/*
* Actually send the packet
*/
rawsock_send_packet(adapter, p->px, (unsigned)p->length, 1);
/*
* Now that we are done with the packet, put it on the free list
* of buffers that the transmit thread can reuse
*/
for (err=1; err; ) {
err = rte_ring_sp_enqueue(packet_buffers, p);
if (err) {
LOG(0, "transmit queue full (should be impossible)\n");
pixie_usleep(10000);
}
}
/*
* Remember that we sent a packet, which will be used in
* throttling.
*/
(*packets_sent)++;
}
}
}
void
app_ping(void)
{
unsigned i;
uint64_t timestamp, diff_tsc;
const uint64_t timeout = rte_get_tsc_hz() * APP_PING_TIMEOUT_SEC;
for (i = 0; i < RTE_MAX_LCORE; i++) {
struct app_core_params *p = &app.cores[i];
struct rte_ring *ring_req, *ring_resp;
void *msg;
struct app_msg_req *req;
int status;
if ((p->core_type != APP_CORE_FC) &&
(p->core_type != APP_CORE_FW) &&
(p->core_type != APP_CORE_RT) &&
(p->core_type != APP_CORE_RX))
continue;
ring_req = app_get_ring_req(p->core_id);
ring_resp = app_get_ring_resp(p->core_id);
/* Fill request message */
msg = (void *)rte_ctrlmbuf_alloc(app.msg_pool);
if (msg == NULL)
rte_panic("Unable to allocate new message\n");
req = (struct app_msg_req *)
rte_ctrlmbuf_data((struct rte_mbuf *)msg);
req->type = APP_MSG_REQ_PING;
/* Send request */
do {
status = rte_ring_sp_enqueue(ring_req, msg);
} while (status == -ENOBUFS);
/* Wait for response */
timestamp = rte_rdtsc();
do {
status = rte_ring_sc_dequeue(ring_resp, &msg);
diff_tsc = rte_rdtsc() - timestamp;
if (unlikely(diff_tsc > timeout))
rte_panic("Core %u of type %d does not respond "
"to requests\n", p->core_id,
p->core_type);
} while (status != 0);
/* Free message buffer */
rte_ctrlmbuf_free(msg);
}
}
int
onvm_nf_send_msg(uint16_t dest, uint8_t msg_type, void *msg_data) {
int ret;
struct onvm_nf_msg *msg;
ret = rte_mempool_get(nf_msg_pool, (void**)(&msg));
if (ret != 0) {
RTE_LOG(INFO, APP, "Oh the huge manatee! Unable to allocate msg from pool :(\n");
return ret;
}
msg->msg_type = msg_type;
msg->msg_data = msg_data;
return rte_ring_sp_enqueue(nfs[dest].msg_q, (void*)msg);
}
/*
* Send a reply message to the vswitchd
*/
static void
send_reply_to_vswitchd(struct dpdk_message *reply)
{
int rslt = 0;
struct rte_mbuf *mbuf = NULL;
void *ctrlmbuf_data = NULL;
struct client *vswd = NULL;
struct statistics *vswd_stat = NULL;
vswd = &clients[VSWITCHD];
vswd_stat = &vport_stats[VSWITCHD];
/* Preparing the buffer to send */
mbuf = rte_ctrlmbuf_alloc(pktmbuf_pool);
if (!mbuf) {
RTE_LOG(WARNING, APP, "Error : Unable to allocate an mbuf : %s : %d", __FUNCTION__, __LINE__);
switch_tx_drop++;
vswd_stat->rx_drop++;
return;
}
ctrlmbuf_data = rte_ctrlmbuf_data(mbuf);
rte_memcpy(ctrlmbuf_data, reply, sizeof(*reply));
rte_ctrlmbuf_len(mbuf) = sizeof(*reply);
/* Sending the buffer to vswitchd */
rslt = rte_ring_sp_enqueue(vswd->rx_q, mbuf);
if (rslt < 0) {
if (rslt == -ENOBUFS) {
rte_ctrlmbuf_free(mbuf);
switch_tx_drop++;
vswd_stat->rx_drop++;
} else {
overruns++;
}
}
vswd_stat->tx++;
}
/*
* Function sends unmatched packets to vswitchd.
*/
static void
send_packet_to_vswitchd(struct rte_mbuf *mbuf, struct dpdk_upcall *info)
{
int rslt = 0;
struct statistics *vswd_stat = NULL;
void *mbuf_ptr = NULL;
vswd_stat = &vport_stats[VSWITCHD];
/* send one packet, delete information about segments */
rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf);
/* allocate space before the packet for the upcall info */
mbuf_ptr = rte_pktmbuf_prepend(mbuf, sizeof(*info));
if (mbuf_ptr == NULL) {
printf("Cannot prepend upcall info\n");
rte_pktmbuf_free(mbuf);
switch_tx_drop++;
vswd_stat->tx_drop++;
return;
}
rte_memcpy(mbuf_ptr, info, sizeof(*info));
/* send the packet and the upcall info to the daemon */
rslt = rte_ring_sp_enqueue(vswitch_packet_ring, mbuf);
if (rslt < 0) {
if (rslt == -ENOBUFS) {
rte_pktmbuf_free(mbuf);
switch_tx_drop++;
vswd_stat->tx_drop++;
return;
} else {
overruns++;
}
}
vswd_stat->tx++;
}
/*
* Enqueue a single packet to a client rx ring
*/
static void
send_to_client(uint8_t client, struct rte_mbuf *buf)
{
struct client *cl = NULL;
int rslt = 0;
struct statistics *s = NULL;
cl = &clients[client];
s = &vport_stats[client];
rslt = rte_ring_sp_enqueue(cl->rx_q, (void *)buf);
if (rslt < 0) {
if (rslt == -ENOBUFS) {
rte_pktmbuf_free(buf);
switch_tx_drop++;
s->rx_drop++;
} else {
overruns++;
s->rx++;
}
} else {
s->rx++;
}
}
/* This function will perform re-ordering of packets, and injecting into
* the appropriate QID IQ. As LB and DIR QIDs are in the same array, but *NOT*
* contiguous in that array, this function accepts a "range" of QIDs to scan.
*/
static uint16_t
sw_schedule_reorder(struct sw_evdev *sw, int qid_start, int qid_end)
{
/* Perform egress reordering */
struct rte_event *qe;
uint32_t pkts_iter = 0;
for (; qid_start < qid_end; qid_start++) {
struct sw_qid *qid = &sw->qids[qid_start];
int i, num_entries_in_use;
if (qid->type != RTE_SCHED_TYPE_ORDERED)
continue;
num_entries_in_use = rte_ring_free_count(
qid->reorder_buffer_freelist);
for (i = 0; i < num_entries_in_use; i++) {
struct reorder_buffer_entry *entry;
int j;
entry = &qid->reorder_buffer[qid->reorder_buffer_index];
if (!entry->ready)
break;
for (j = 0; j < entry->num_fragments; j++) {
uint16_t dest_qid;
uint16_t dest_iq;
int idx = entry->fragment_index + j;
qe = &entry->fragments[idx];
dest_qid = qe->queue_id;
dest_iq = PRIO_TO_IQ(qe->priority);
if (dest_qid >= sw->qid_count) {
sw->stats.rx_dropped++;
continue;
}
struct sw_qid *dest_qid_ptr =
&sw->qids[dest_qid];
const struct iq_ring *dest_iq_ptr =
dest_qid_ptr->iq[dest_iq];
if (iq_ring_free_count(dest_iq_ptr) == 0)
break;
pkts_iter++;
struct sw_qid *q = &sw->qids[dest_qid];
struct iq_ring *r = q->iq[dest_iq];
/* we checked for space above, so enqueue must
* succeed
*/
iq_ring_enqueue(r, qe);
q->iq_pkt_mask |= (1 << (dest_iq));
q->iq_pkt_count[dest_iq]++;
q->stats.rx_pkts++;
}
entry->ready = (j != entry->num_fragments);
entry->num_fragments -= j;
entry->fragment_index += j;
if (!entry->ready) {
entry->fragment_index = 0;
rte_ring_sp_enqueue(
qid->reorder_buffer_freelist,
entry);
qid->reorder_buffer_index++;
qid->reorder_buffer_index %= qid->window_size;
}
}
}
return pkts_iter;
}
/* create the mempool */
struct rte_mempool *
rte_mempool_create(const char *name, unsigned n, unsigned elt_size,
unsigned cache_size, unsigned private_data_size,
rte_mempool_ctor_t *mp_init, void *mp_init_arg,
rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg,
int socket_id, unsigned flags)
{
char mz_name[RTE_MEMZONE_NAMESIZE];
char rg_name[RTE_RING_NAMESIZE];
struct rte_mempool *mp = NULL;
struct rte_ring *r;
const struct rte_memzone *mz;
size_t mempool_size, total_elt_size;
int mz_flags = RTE_MEMZONE_1GB|RTE_MEMZONE_SIZE_HINT_ONLY;
int rg_flags = 0;
uint32_t header_size, trailer_size;
unsigned i;
void *obj;
/* compilation-time checks */
RTE_BUILD_BUG_ON((sizeof(struct rte_mempool) &
CACHE_LINE_MASK) != 0);
#if RTE_MEMPOOL_CACHE_MAX_SIZE > 0
RTE_BUILD_BUG_ON((sizeof(struct rte_mempool_cache) &
CACHE_LINE_MASK) != 0);
RTE_BUILD_BUG_ON((offsetof(struct rte_mempool, local_cache) &
CACHE_LINE_MASK) != 0);
#endif
#ifdef RTE_LIBRTE_MEMPOOL_DEBUG
RTE_BUILD_BUG_ON((sizeof(struct rte_mempool_debug_stats) &
CACHE_LINE_MASK) != 0);
RTE_BUILD_BUG_ON((offsetof(struct rte_mempool, stats) &
CACHE_LINE_MASK) != 0);
#endif
/* check that we have an initialised tail queue */
if (RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_MEMPOOL, rte_mempool_list) == NULL) {
rte_errno = E_RTE_NO_TAILQ;
return NULL;
}
/* asked cache too big */
if (cache_size > RTE_MEMPOOL_CACHE_MAX_SIZE){
rte_errno = EINVAL;
return NULL;
}
/* "no cache align" imply "no spread" */
if (flags & MEMPOOL_F_NO_CACHE_ALIGN)
flags |= MEMPOOL_F_NO_SPREAD;
/* ring flags */
if (flags & MEMPOOL_F_SP_PUT)
rg_flags |= RING_F_SP_ENQ;
if (flags & MEMPOOL_F_SC_GET)
rg_flags |= RING_F_SC_DEQ;
rte_rwlock_write_lock(RTE_EAL_MEMPOOL_RWLOCK);
/* allocate the ring that will be used to store objects */
/* Ring functions will return appropriate errors if we are
* running as a secondary process etc., so no checks made
* in this function for that condition */
rte_snprintf(rg_name, sizeof(rg_name), "MP_%s", name);
r = rte_ring_create(rg_name, rte_align32pow2(n+1), socket_id, rg_flags);
if (r == NULL)
goto exit;
/*
* In header, we have at least the pointer to the pool, and
* optionaly a 64 bits cookie.
*/
header_size = 0;
header_size += sizeof(struct rte_mempool *); /* ptr to pool */
#ifdef RTE_LIBRTE_MEMPOOL_DEBUG
header_size += sizeof(uint64_t); /* cookie */
#endif
if ((flags & MEMPOOL_F_NO_CACHE_ALIGN) == 0)
header_size = (header_size + CACHE_LINE_MASK) & (~CACHE_LINE_MASK);
/* trailer contains the cookie in debug mode */
trailer_size = 0;
#ifdef RTE_LIBRTE_MEMPOOL_DEBUG
trailer_size += sizeof(uint64_t); /* cookie */
#endif
/* element size is 8 bytes-aligned at least */
elt_size = (elt_size + 7) & (~7);
/* expand trailer to next cache line */
if ((flags & MEMPOOL_F_NO_CACHE_ALIGN) == 0) {
total_elt_size = header_size + elt_size + trailer_size;
trailer_size += ((CACHE_LINE_SIZE -
(total_elt_size & CACHE_LINE_MASK)) &
CACHE_LINE_MASK);
}
/*
* increase trailer to add padding between objects in order to
* spread them accross memory channels/ranks
*/
if ((flags & MEMPOOL_F_NO_SPREAD) == 0) {
unsigned new_size;
new_size = optimize_object_size(header_size + elt_size +
trailer_size);
trailer_size = new_size - header_size - elt_size;
}
/* this is the size of an object, including header and trailer */
total_elt_size = header_size + elt_size + trailer_size;
/* reserve a memory zone for this mempool: private data is
* cache-aligned */
private_data_size = (private_data_size +
CACHE_LINE_MASK) & (~CACHE_LINE_MASK);
mempool_size = total_elt_size * n +
sizeof(struct rte_mempool) + private_data_size;
rte_snprintf(mz_name, sizeof(mz_name), "MP_%s", name);
mz = rte_memzone_reserve(mz_name, mempool_size, socket_id, mz_flags);
/*
* no more memory: in this case we loose previously reserved
* space for the as we cannot free it
*/
if (mz == NULL)
goto exit;
/* init the mempool structure */
mp = mz->addr;
memset(mp, 0, sizeof(*mp));
rte_snprintf(mp->name, sizeof(mp->name), "%s", name);
mp->phys_addr = mz->phys_addr;
mp->ring = r;
mp->size = n;
mp->flags = flags;
mp->elt_size = elt_size;
mp->header_size = header_size;
mp->trailer_size = trailer_size;
mp->cache_size = cache_size;
mp->cache_flushthresh = (uint32_t)(cache_size * CACHE_FLUSHTHRESH_MULTIPLIER);
mp->private_data_size = private_data_size;
/* call the initializer */
if (mp_init)
mp_init(mp, mp_init_arg);
/* fill the headers and trailers, and add objects in ring */
obj = (char *)mp + sizeof(struct rte_mempool) + private_data_size;
for (i = 0; i < n; i++) {
struct rte_mempool **mpp;
obj = (char *)obj + header_size;
/* set mempool ptr in header */
mpp = __mempool_from_obj(obj);
*mpp = mp;
#ifdef RTE_LIBRTE_MEMPOOL_DEBUG
__mempool_write_header_cookie(obj, 1);
__mempool_write_trailer_cookie(obj);
#endif
/* call the initializer */
if (obj_init)
obj_init(mp, obj_init_arg, obj, i);
/* enqueue in ring */
rte_ring_sp_enqueue(mp->ring, obj);
obj = (char *)obj + elt_size + trailer_size;
}
RTE_EAL_TAILQ_INSERT_TAIL(RTE_TAILQ_MEMPOOL, rte_mempool_list, mp);
exit:
rte_rwlock_write_unlock(RTE_EAL_MEMPOOL_RWLOCK);
return mp;
}