if (!unformat_user (input, unformat_line_input, line_input))
return 0;
+ args.is_zero_copy = 1;
+
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "id %u", &args.id))
args.is_master = 1;
else if (unformat (line_input, "slave"))
args.is_master = 0;
+ else if (unformat (line_input, "no-zero-copy"))
+ args.is_zero_copy = 0;
else if (unformat (line_input, "mode ip"))
args.mode = MEMIF_INTERFACE_MODE_IP;
else if (unformat (line_input, "hw-addr %U",
memif_main_t *mm = &memif_main;
memif_if_t *mif;
vnet_main_t *vnm = vnet_get_main ();
+ memif_region_t *mr;
memif_queue_t *mq;
uword i;
int show_descr = 0;
vlib_cli_output (vm, " listener-fd %d conn-fd %d",
msf->sock ? msf->sock->fd : 0,
mif->sock ? mif->sock->fd : 0);
- vlib_cli_output (vm,
- " num-s2m-rings %u num-m2s-rings %u buffer-size %u",
+ vlib_cli_output (vm, " num-s2m-rings %u num-m2s-rings %u "
+ "buffer-size %u num-regions %u",
mif->run.num_s2m_rings, mif->run.num_m2s_rings,
- mif->run.buffer_size);
+ mif->run.buffer_size, vec_len (mif->regions));
if (mif->local_disc_string)
vlib_cli_output (vm, " local-disc-reason \"%s\"",
vlib_cli_output (vm, " remote-disc-reason \"%s\"",
mif->remote_disc_string);
+ /* *INDENT-OFF* */
+ vec_foreach_index (i, mif->regions)
+ {
+ mr = vec_elt_at_index (mif->regions, i);
+ vlib_cli_output (vm, " region %u size %u fd %d", i,
+ mr->region_size, mr->fd);
+ }
vec_foreach_index (i, mif->tx_queues)
- {
- mq = vec_elt_at_index (mif->tx_queues, i);
- vlib_cli_output (vm, " %U", format_memif_queue, mq, i);
- if (show_descr)
- vlib_cli_output (vm, " %U", format_memif_descriptor, mif, mq);
- }
+ {
+ mq = vec_elt_at_index (mif->tx_queues, i);
+ vlib_cli_output (vm, " %U", format_memif_queue, mq, i);
+ if (show_descr)
+ vlib_cli_output (vm, " %U", format_memif_descriptor, mif, mq);
+ }
vec_foreach_index (i, mif->rx_queues)
- {
- mq = vec_elt_at_index (mif->rx_queues, i);
- vlib_cli_output (vm, " %U", format_memif_queue, mq, i);
- if (show_descr)
- vlib_cli_output (vm, " %U", format_memif_descriptor, mif, mq);
- }
+ {
+ mq = vec_elt_at_index (mif->rx_queues, i);
+ vlib_cli_output (vm, " %U", format_memif_queue, mq, i);
+ if (show_descr)
+ vlib_cli_output (vm, " %U", format_memif_descriptor, mif, mq);
+ }
+ /* *INDENT-ON* */
}
done:
vec_free (hw_if_indices);
static_always_inline uword
memif_interface_tx_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame, memif_if_t * mif,
- memif_ring_type_t type)
+ memif_ring_type_t type, memif_queue_t * mq,
+ memif_per_thread_data_t * ptd)
{
- u8 qid;
memif_ring_t *ring;
u32 *buffers = vlib_frame_args (frame);
u32 n_left = frame->n_vectors;
u32 n_copy_op;
u16 ring_size, mask, slot, free_slots;
- u32 thread_index = vlib_get_thread_index ();
- memif_per_thread_data_t *ptd = vec_elt_at_index (memif_main.per_thread_data,
- thread_index);
- u8 tx_queues = vec_len (mif->tx_queues);
- memif_queue_t *mq;
int n_retries = 5;
vlib_buffer_t *b0, *b1, *b2, *b3;
memif_copy_op_t *co;
memif_region_index_t last_region = ~0;
void *last_region_shm = 0;
- if (tx_queues < vec_len (vlib_mains))
- {
- ASSERT (tx_queues > 0);
- qid = thread_index % tx_queues;
- clib_spinlock_lock_if_init (&mif->lockp);
- }
- else
- qid = thread_index;
-
- mq = vec_elt_at_index (mif->tx_queues, qid);
ring = mq->ring;
ring_size = 1 << mq->log2_ring_size;
mask = ring_size - 1;
return frame->n_vectors;
}
+static_always_inline uword
+memif_interface_tx_zc_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame, memif_if_t * mif,
+ memif_queue_t * mq,
+ memif_per_thread_data_t * ptd)
+{
+ memif_ring_t *ring = mq->ring;
+ u32 *buffers = vlib_frame_args (frame);
+ u32 n_left = frame->n_vectors;
+ u16 slot, free_slots, n_free;
+ u16 ring_size = 1 << mq->log2_ring_size;
+ u16 mask = ring_size - 1;
+ int n_retries = 5;
+ vlib_buffer_t *b0;
+
+retry:
+ n_free = ring->tail - mq->last_tail;
+ if (n_free >= 16)
+ {
+ vlib_buffer_free_from_ring_no_next (vm, mq->buffers, mq->last_tail,
+ ring_size, n_free);
+ mq->last_tail += n_free;
+ }
+
+ slot = ring->head;
+ free_slots = ring_size - ring->head + mq->last_tail;
+
+ while (n_left && free_slots)
+ {
+ u16 s0;
+ u16 slots_in_packet = 1;
+ memif_desc_t *d0;
+ u32 bi0;
+
+ CLIB_PREFETCH (&ring->desc[(slot + 8) & mask], CLIB_CACHE_LINE_BYTES,
+ STORE);
+
+ if (PREDICT_TRUE (n_left >= 4))
+ vlib_prefetch_buffer_header (vlib_get_buffer (vm, buffers[3]), LOAD);
+
+ bi0 = buffers[0];
+
+ next_in_chain:
+ s0 = slot & mask;
+ d0 = &ring->desc[s0];
+ mq->buffers[s0] = bi0;
+ b0 = vlib_get_buffer (vm, bi0);
+
+ d0->region = b0->buffer_pool_index + 1;
+ d0->offset = (void *) b0->data + b0->current_data -
+ mif->regions[d0->region].shm;
+ d0->length = b0->current_length;
+
+ free_slots--;
+ slot++;
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_NEXT_PRESENT))
+ {
+ if (PREDICT_FALSE (free_slots == 0))
+ {
+ /* revert to last fully processed packet */
+ free_slots += slots_in_packet;
+ slot -= slots_in_packet;
+ goto no_free_slots;
+ }
+
+ d0->flags = MEMIF_DESC_FLAG_NEXT;
+ bi0 = b0->next_buffer;
+
+ /* next */
+ slots_in_packet++;
+ goto next_in_chain;
+ }
+
+ d0->flags = 0;
+
+ /* next from */
+ buffers++;
+ n_left--;
+ }
+no_free_slots:
+
+ CLIB_MEMORY_STORE_BARRIER ();
+ ring->head = slot;
+
+ if (n_left && n_retries--)
+ goto retry;
+
+ clib_spinlock_unlock_if_init (&mif->lockp);
+
+ if (n_left)
+ {
+ vlib_error_count (vm, node->node_index, MEMIF_TX_ERROR_NO_FREE_SLOTS,
+ n_left);
+ vlib_buffer_free (vm, buffers, n_left);
+ }
+
+ if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0 && mq->int_fd > -1)
+ {
+ u64 b = 1;
+ CLIB_UNUSED (int r) = write (mq->int_fd, &b, sizeof (b));
+ mq->int_count++;
+ }
+
+ return frame->n_vectors;
+}
+
uword
CLIB_MULTIARCH_FN (memif_interface_tx) (vlib_main_t * vm,
vlib_node_runtime_t * node,
memif_main_t *nm = &memif_main;
vnet_interface_output_runtime_t *rund = (void *) node->runtime_data;
memif_if_t *mif = pool_elt_at_index (nm->interfaces, rund->dev_instance);
+ memif_queue_t *mq;
+ u32 thread_index = vlib_get_thread_index ();
+ memif_per_thread_data_t *ptd = vec_elt_at_index (memif_main.per_thread_data,
+ thread_index);
+ u8 tx_queues = vec_len (mif->tx_queues);
+
+ if (tx_queues < vec_len (vlib_mains))
+ {
+ ASSERT (tx_queues > 0);
+ mq = vec_elt_at_index (mif->tx_queues, thread_index % tx_queues);
+ clib_spinlock_lock_if_init (&mif->lockp);
+ }
+ else
+ mq = vec_elt_at_index (mif->tx_queues, thread_index);
- if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
- return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_S2M);
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ return memif_interface_tx_zc_inline (vm, node, frame, mif, mq, ptd);
+ else if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
+ return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_S2M,
+ mq, ptd);
else
- return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_M2S);
+ return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_M2S,
+ mq, ptd);
}
static __clib_unused void
clib_mem_free (mif->sock);
}
+ /* *INDENT-OFF* */
vec_foreach_index (i, mif->rx_queues)
- {
- mq = vec_elt_at_index (mif->rx_queues, i);
- if (mq->ring)
- {
- int rv;
- rv = vnet_hw_interface_unassign_rx_thread (vnm, mif->hw_if_index, i);
- if (rv)
- DBG ("Warning: unable to unassign interface %d, "
- "queue %d: rc=%d", mif->hw_if_index, i, rv);
- mq->ring = 0;
- }
- }
+ {
+ mq = vec_elt_at_index (mif->rx_queues, i);
+ if (mq->ring)
+ {
+ int rv;
+ rv = vnet_hw_interface_unassign_rx_thread (vnm, mif->hw_if_index, i);
+ if (rv)
+ DBG ("Warning: unable to unassign interface %d, "
+ "queue %d: rc=%d", mif->hw_if_index, i, rv);
+ mq->ring = 0;
+ }
+ }
/* free tx and rx queues */
- vec_foreach (mq, mif->rx_queues) memif_queue_intfd_close (mq);
+ vec_foreach (mq, mif->rx_queues)
+ memif_queue_intfd_close (mq);
vec_free (mif->rx_queues);
- vec_foreach (mq, mif->tx_queues) memif_queue_intfd_close (mq);
+ vec_foreach (mq, mif->tx_queues)
+ memif_queue_intfd_close (mq);
vec_free (mif->tx_queues);
/* free memory regions */
vec_foreach (mr, mif->regions)
- {
- int rv;
- if ((rv = munmap (mr->shm, mr->region_size)))
- clib_warning ("munmap failed, rv = %d", rv);
- if (mr->fd > -1)
- close (mr->fd);
- }
+ {
+ int rv;
+ if (mr->is_external)
+ continue;
+ if ((rv = munmap (mr->shm, mr->region_size)))
+ clib_warning ("munmap failed, rv = %d", rv);
+ if (mr->fd > -1)
+ close (mr->fd);
+ }
+ /* *INDENT-ON* */
vec_free (mif->regions);
vec_free (mif->remote_name);
vec_free (mif->remote_if_name);
vec_free (mif->local_disc_string);
vec_free (mif->remote_disc_string);
+ /* *INDENT-OFF* */
vec_foreach (mr, mif->regions)
- {
- if (mr->shm)
- continue;
+ {
+ if (mr->shm)
+ continue;
- if (mr->fd < 0)
- clib_error_return (0, "no memory region fd");
+ if (mr->fd < 0)
+ clib_error_return (0, "no memory region fd");
- if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
- MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
- return clib_error_return_unix (0, "mmap");
- }
+ if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
+ MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
+ return clib_error_return_unix (0, "mmap");
+ }
+ /* *INDENT-ON* */
template.read_function = memif_int_fd_read_ready;
+ /* *INDENT-OFF* */
vec_foreach_index (i, mif->tx_queues)
- {
- memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
+ {
+ memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
- mq->ring = mif->regions[mq->region].shm + mq->offset;
- if (mq->ring->cookie != MEMIF_COOKIE)
- return clib_error_return (0, "wrong cookie on tx ring %u", i);
- }
+ mq->ring = mif->regions[mq->region].shm + mq->offset;
+ if (mq->ring->cookie != MEMIF_COOKIE)
+ return clib_error_return (0, "wrong cookie on tx ring %u", i);
+ }
vec_foreach_index (i, mif->rx_queues)
- {
- memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
- int rv;
-
- mq->ring = mif->regions[mq->region].shm + mq->offset;
- if (mq->ring->cookie != MEMIF_COOKIE)
- return clib_error_return (0, "wrong cookie on tx ring %u", i);
-
- if (mq->int_fd > -1)
- {
- template.file_descriptor = mq->int_fd;
- template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
- template.description = format (0, "%U rx %u int",
- format_memif_device_name,
- mif->dev_instance, i);
- memif_file_add (&mq->int_clib_file_index, &template);
- }
- vnet_hw_interface_assign_rx_thread (vnm, mif->hw_if_index, i, ~0);
- rv = vnet_hw_interface_set_rx_mode (vnm, mif->hw_if_index, i,
- VNET_HW_INTERFACE_RX_MODE_DEFAULT);
- if (rv)
- clib_warning
- ("Warning: unable to set rx mode for interface %d queue %d: "
- "rc=%d", mif->hw_if_index, i, rv);
- else
- {
- vnet_hw_interface_rx_mode rxmode;
- vnet_hw_interface_get_rx_mode (vnm, mif->hw_if_index, i, &rxmode);
-
- if (rxmode == VNET_HW_INTERFACE_RX_MODE_POLLING)
- mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
- else
- vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, i);
- }
- }
+ {
+ memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
+ int rv;
+
+ mq->ring = mif->regions[mq->region].shm + mq->offset;
+ if (mq->ring->cookie != MEMIF_COOKIE)
+ return clib_error_return (0, "wrong cookie on tx ring %u", i);
+
+ if (mq->int_fd > -1)
+ {
+ template.file_descriptor = mq->int_fd;
+ template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
+ template.description = format (0, "%U rx %u int",
+ format_memif_device_name,
+ mif->dev_instance, i);
+ memif_file_add (&mq->int_clib_file_index, &template);
+ }
+ vnet_hw_interface_assign_rx_thread (vnm, mif->hw_if_index, i, ~0);
+ rv = vnet_hw_interface_set_rx_mode (vnm, mif->hw_if_index, i,
+ VNET_HW_INTERFACE_RX_MODE_DEFAULT);
+ if (rv)
+ clib_warning
+ ("Warning: unable to set rx mode for interface %d queue %d: "
+ "rc=%d", mif->hw_if_index, i, rv);
+ else
+ {
+ vnet_hw_interface_rx_mode rxmode;
+ vnet_hw_interface_get_rx_mode (vnm, mif->hw_if_index, i, &rxmode);
+
+ if (rxmode == VNET_HW_INTERFACE_RX_MODE_POLLING)
+ mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
+ else
+ vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, i);
+ }
+ }
+ /* *INDENT-ON* */
mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
mif->flags |= MEMIF_IF_FLAG_CONNECTED;
clib_error_t *
memif_init_regions_and_queues (memif_if_t * mif)
{
+ vlib_main_t *vm = vlib_get_main ();
memif_ring_t *ring = NULL;
int i, j;
u64 buffer_offset;
clib_mem_vm_alloc_t alloc = { 0 };
clib_error_t *err;
- vec_validate_aligned (mif->regions, 0, CLIB_CACHE_LINE_BYTES);
- r = vec_elt_at_index (mif->regions, 0);
+ ASSERT (vec_len (mif->regions) == 0);
+ vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) *
(sizeof (memif_ring_t) +
sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size));
- r->region_size = buffer_offset +
- mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
- (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
+ r->region_size = buffer_offset;
+
+ if ((mif->flags & MEMIF_IF_FLAG_ZERO_COPY) == 0)
+ r->region_size += mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
+ (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
alloc.name = "memif region";
alloc.size = r->region_size;
r->fd = alloc.fd;
r->shm = alloc.addr;
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ {
+ vlib_buffer_pool_t *bp;
+ /* *INDENT-OFF* */
+ vec_foreach (bp, buffer_main.buffer_pools)
+ {
+ vlib_physmem_region_t *pr;
+ pr = vlib_physmem_get_region (vm, bp->physmem_region);
+ vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
+ r->fd = pr->fd;
+ r->region_size = pr->size;
+ r->shm = pr->mem;
+ r->is_external = 1;
+ }
+ /* *INDENT-ON* */
+ }
+
for (i = 0; i < mif->run.num_s2m_rings; i++)
{
ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
ring->head = ring->tail = 0;
ring->cookie = MEMIF_COOKIE;
+
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ continue;
+
for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
{
u16 slot = i * (1 << mif->run.log2_ring_size) + j;
ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
ring->head = ring->tail = 0;
ring->cookie = MEMIF_COOKIE;
+
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ continue;
+
for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
{
u16 slot =
ASSERT (mif->tx_queues == 0);
vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1,
CLIB_CACHE_LINE_BYTES);
+
+ /* *INDENT-OFF* */
vec_foreach_index (i, mif->tx_queues)
- {
- memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
- if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
- return clib_error_return_unix (0, "eventfd[tx queue %u]", i);
- mq->int_clib_file_index = ~0;
- mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
- mq->log2_ring_size = mif->cfg.log2_ring_size;
- mq->region = 0;
- mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
- mq->last_head = 0;
- mq->type = MEMIF_RING_S2M;
- }
+ {
+ memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
+ if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
+ return clib_error_return_unix (0, "eventfd[tx queue %u]", i);
+ mq->int_clib_file_index = ~0;
+ mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
+ mq->log2_ring_size = mif->cfg.log2_ring_size;
+ mq->region = 0;
+ mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
+ mq->last_head = 0;
+ mq->type = MEMIF_RING_S2M;
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
+ CLIB_CACHE_LINE_BYTES);
+ }
+ /* *INDENT-ON* */
ASSERT (mif->rx_queues == 0);
vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1,
CLIB_CACHE_LINE_BYTES);
+
+ /* *INDENT-OFF* */
vec_foreach_index (i, mif->rx_queues)
- {
- memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
- if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
- return clib_error_return_unix (0, "eventfd[rx queue %u]", i);
- mq->int_clib_file_index = ~0;
- mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
- mq->log2_ring_size = mif->cfg.log2_ring_size;
- mq->region = 0;
- mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
- mq->last_head = 0;
- mq->type = MEMIF_RING_M2S;
- }
+ {
+ memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
+ if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
+ return clib_error_return_unix (0, "eventfd[rx queue %u]", i);
+ mq->int_clib_file_index = ~0;
+ mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
+ mq->log2_ring_size = mif->cfg.log2_ring_size;
+ mq->region = 0;
+ mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
+ mq->last_head = 0;
+ mq->type = MEMIF_RING_M2S;
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
+ CLIB_CACHE_LINE_BYTES);
+ }
+ /* *INDENT-ON* */
return 0;
}
if (msf->is_listener)
{
int i;
+ /* *INDENT-OFF* */
vec_foreach_index (i, msf->pending_clients)
- {
memif_socket_close (msf->pending_clients + i);
- }
+ /* *INDENT-ON* */
memif_socket_close (&msf->sock);
vec_free (msf->pending_clients);
}
msf->ref_cnt++;
if (args->is_master == 0)
- mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
+ {
+ mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
+ if (args->is_zero_copy)
+ mif->flags |= MEMIF_IF_FLAG_ZERO_COPY;
+ }
hw = vnet_get_hw_interface (vnm, mif->hw_if_index);
hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
}
}
+static_always_inline u32
+sat_sub (u32 x, u32 y)
+{
+ u32 res = x - y;
+ res &= -(res <= x);
+ return res;
+}
+
+/* branchless validation of the descriptor - uses saturated subtraction */
+static_always_inline u32
+memif_desc_is_invalid (memif_if_t * mif, memif_desc_t * d, u32 buffer_length)
+{
+ u32 rv;
+ u16 valid_flags = MEMIF_DESC_FLAG_NEXT;
+
+ rv = d->flags & (~valid_flags);
+ rv |= sat_sub (d->region + 1, vec_len (mif->regions));
+ rv |= sat_sub (d->length, buffer_length);
+ rv |= sat_sub (d->offset + d->length, mif->regions[d->region].region_size);
+
+ if (PREDICT_FALSE (rv))
+ {
+ mif->flags |= MEMIF_IF_FLAG_ERROR;
+ return 1;
+ }
+
+ return 0;
+}
+
static_always_inline uword
memif_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame, memif_if_t * mif,
so start with IP header at offset 14 */
start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0;
-
/* for S2M rings, we are consumers of packet buffers, and for M2S rings we
are producers of empty buffers */
cur_slot = (type == MEMIF_RING_S2M) ? mq->last_head : mq->last_tail;
return n_rx_packets;
}
+static_always_inline uword
+memif_device_input_zc_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame, memif_if_t * mif,
+ u16 qid, memif_interface_mode_t mode)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ memif_main_t *mm = &memif_main;
+ memif_ring_t *ring;
+ memif_queue_t *mq;
+ u32 next_index;
+ uword n_trace = vlib_get_trace_count (vm, node);
+ u32 n_rx_packets = 0, n_rx_bytes = 0;
+ u32 *to_next = 0, *buffers;
+ u32 bi0, bi1, bi2, bi3;
+ vlib_buffer_t *b0, *b1, *b2, *b3;
+ u32 thread_index = vlib_get_thread_index ();
+ memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data,
+ thread_index);
+ vlib_buffer_t *bt = &ptd->buffer_template;
+ u16 cur_slot, last_slot, ring_size, n_slots, mask, head;
+ i16 start_offset;
+ u32 buffer_length;
+ u16 n_alloc;
+
+ mq = vec_elt_at_index (mif->rx_queues, qid);
+ ring = mq->ring;
+ ring_size = 1 << mq->log2_ring_size;
+ mask = ring_size - 1;
+
+ next_index = (mode == MEMIF_INTERFACE_MODE_IP) ?
+ VNET_DEVICE_INPUT_NEXT_IP6_INPUT : VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+
+ /* asume that somebody will want to add ethernet header on the packet
+ so start with IP header at offset 14 */
+ start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0;
+ buffer_length = VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES - start_offset;
+
+ cur_slot = mq->last_tail;
+ last_slot = ring->tail;
+ if (cur_slot == last_slot)
+ goto refill;
+ n_slots = last_slot - cur_slot;
+
+ /* process ring slots */
+ vec_validate_aligned (ptd->buffers, MEMIF_RX_VECTOR_SZ,
+ CLIB_CACHE_LINE_BYTES);
+ while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ)
+ {
+ u16 s0;
+ memif_desc_t *d0;
+ vlib_buffer_t *hb;
+
+ s0 = cur_slot & mask;
+ bi0 = mq->buffers[s0];
+ ptd->buffers[n_rx_packets++] = bi0;
+
+ CLIB_PREFETCH (&ring->desc[(cur_slot + 8) & mask],
+ CLIB_CACHE_LINE_BYTES, LOAD);
+ d0 = &ring->desc[s0];
+ hb = b0 = vlib_get_buffer (vm, bi0);
+ b0->current_data = start_offset;
+ b0->current_length = start_offset + d0->length;
+
+
+ if (0 && memif_desc_is_invalid (mif, d0, buffer_length))
+ return 0;
+
+ cur_slot++;
+ n_slots--;
+ if (PREDICT_FALSE ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots))
+ {
+ hb->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ next_slot:
+ s0 = cur_slot & mask;
+ d0 = &ring->desc[s0];
+ bi0 = mq->buffers[s0];
+
+ /*previous buffer */
+ b0->next_buffer = bi0;
+ b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
+
+ /* current buffer */
+ b0 = vlib_get_buffer (vm, bi0);
+ b0->current_data = start_offset;
+ b0->current_length = start_offset + d0->length;
+ hb->total_length_not_including_first_buffer += d0->length;
+
+ cur_slot++;
+ n_slots--;
+ if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)
+ goto next_slot;
+ }
+ }
+
+ /* release slots from the ring */
+ mq->last_tail = cur_slot;
+
+ u32 n_from = n_rx_packets;
+
+ vnet_buffer (bt)->sw_if_index[VLIB_RX] = mif->sw_if_index;
+
+ buffers = ptd->buffers;
+
+ while (n_from)
+ {
+ u32 n_left_to_next;
+ u32 next0, next1, next2, next3;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ while (n_from >= 8 && n_left_to_next >= 4)
+ {
+ b0 = vlib_get_buffer (vm, buffers[4]);
+ b1 = vlib_get_buffer (vm, buffers[5]);
+ b2 = vlib_get_buffer (vm, buffers[6]);
+ b3 = vlib_get_buffer (vm, buffers[7]);
+ vlib_prefetch_buffer_header (b0, STORE);
+ vlib_prefetch_buffer_header (b1, STORE);
+ vlib_prefetch_buffer_header (b2, STORE);
+ vlib_prefetch_buffer_header (b3, STORE);
+
+ /* enqueue buffer */
+ to_next[0] = bi0 = buffers[0];
+ to_next[1] = bi1 = buffers[1];
+ to_next[2] = bi2 = buffers[2];
+ to_next[3] = bi3 = buffers[3];
+ to_next += 4;
+ n_left_to_next -= 4;
+ buffers += 4;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+ b2 = vlib_get_buffer (vm, bi2);
+ b3 = vlib_get_buffer (vm, bi3);
+
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
+ vnet_buffer (b1)->sw_if_index[VLIB_RX] = mif->sw_if_index;
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = ~0;
+ vnet_buffer (b2)->sw_if_index[VLIB_RX] = mif->sw_if_index;
+ vnet_buffer (b2)->sw_if_index[VLIB_TX] = ~0;
+ vnet_buffer (b3)->sw_if_index[VLIB_RX] = mif->sw_if_index;
+ vnet_buffer (b3)->sw_if_index[VLIB_TX] = ~0;
+
+ if (mode == MEMIF_INTERFACE_MODE_IP)
+ {
+ next0 = memif_next_from_ip_hdr (node, b0);
+ next1 = memif_next_from_ip_hdr (node, b1);
+ next2 = memif_next_from_ip_hdr (node, b2);
+ next3 = memif_next_from_ip_hdr (node, b3);
+ }
+ else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
+ {
+ if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
+ {
+ next0 = mif->per_interface_next_index;
+ next1 = mif->per_interface_next_index;
+ next2 = mif->per_interface_next_index;
+ next3 = mif->per_interface_next_index;
+ }
+ else
+ {
+ next0 = next1 = next2 = next3 = next_index;
+ /* redirect if feature path enabled */
+ vnet_feature_start_device_input_x1 (mif->sw_if_index,
+ &next0, b0);
+ vnet_feature_start_device_input_x1 (mif->sw_if_index,
+ &next1, b1);
+ vnet_feature_start_device_input_x1 (mif->sw_if_index,
+ &next2, b2);
+ vnet_feature_start_device_input_x1 (mif->sw_if_index,
+ &next3, b3);
+ }
+ }
+
+ /* trace */
+ if (PREDICT_FALSE (n_trace > 0))
+ {
+ memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
+ if (PREDICT_FALSE (n_trace > 0))
+ memif_trace_buffer (vm, node, mif, b1, next1, qid, &n_trace);
+ if (PREDICT_FALSE (n_trace > 0))
+ memif_trace_buffer (vm, node, mif, b2, next2, qid, &n_trace);
+ if (PREDICT_FALSE (n_trace > 0))
+ memif_trace_buffer (vm, node, mif, b3, next3, qid, &n_trace);
+ }
+
+ /* enqueue */
+ vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1, bi2, bi3,
+ next0, next1, next2, next3);
+
+ /* next */
+ n_from -= 4;
+ }
+ while (n_from && n_left_to_next)
+ {
+ /* enqueue buffer */
+ to_next[0] = bi0 = buffers[0];
+ to_next += 1;
+ n_left_to_next--;
+ buffers += 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
+
+ if (mode == MEMIF_INTERFACE_MODE_IP)
+ {
+ next0 = memif_next_from_ip_hdr (node, b0);
+ }
+ else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
+ {
+ if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
+ next0 = mif->per_interface_next_index;
+ else
+ {
+ next0 = next_index;
+ /* redirect if feature path enabled */
+ vnet_feature_start_device_input_x1 (mif->sw_if_index,
+ &next0, b0);
+ }
+ }
+
+ /* trace */
+ if (PREDICT_FALSE (n_trace > 0))
+ memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
+
+ /* enqueue */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+
+ /* next */
+ n_from--;
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX, thread_index,
+ mif->hw_if_index, n_rx_packets,
+ n_rx_bytes);
+
+ /* refill ring with empty buffers */
+refill:
+ vec_reset_length (ptd->buffers);
+
+ head = ring->head;
+ n_slots = ring_size - head + mq->last_tail;
+
+ if (n_slots < 8)
+ goto done;
+
+ memif_desc_t *dt = &ptd->desc_template;
+ memset (dt, 0, sizeof (memif_desc_t));
+ dt->length = VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES - start_offset;
+
+ n_alloc = vlib_buffer_alloc_to_ring (vm, mq->buffers, head & mask,
+ ring_size, n_slots);
+
+ if (PREDICT_FALSE (n_alloc != n_slots))
+ {
+ vlib_error_count (vm, node->node_index,
+ MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
+ }
+
+ while (n_alloc--)
+ {
+ u16 s = head++ & mask;
+ memif_desc_t *d = &ring->desc[s];
+ clib_memcpy (d, dt, sizeof (memif_desc_t));
+ b0 = vlib_get_buffer (vm, mq->buffers[s]);
+ d->region = b0->buffer_pool_index + 1;
+ d->offset =
+ (void *) b0->data - mif->regions[d->region].shm + start_offset;
+ }
+
+ CLIB_MEMORY_STORE_BARRIER ();
+ ring->head = head;
+
+done:
+ return n_rx_packets;
+}
+
uword
CLIB_MULTIARCH_FN (memif_input_fn) (vlib_main_t * vm,
vlib_node_runtime_t * node,
memif_main_t *mm = &memif_main;
vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
vnet_device_and_queue_t *dq;
+ memif_interface_mode_t mode_ip = MEMIF_INTERFACE_MODE_IP;
+ memif_interface_mode_t mode_eth = MEMIF_INTERFACE_MODE_ETHERNET;
foreach_device_and_queue (dq, rt->devices_and_queues)
{
if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) &&
(mif->flags & MEMIF_IF_FLAG_CONNECTED))
{
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ {
+ if (mif->mode == MEMIF_INTERFACE_MODE_IP)
+ n_rx += memif_device_input_zc_inline (vm, node, frame, mif,
+ dq->queue_id, mode_ip);
+ else
+ n_rx += memif_device_input_zc_inline (vm, node, frame, mif,
+ dq->queue_id, mode_eth);
+ }
if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
{
if (mif->mode == MEMIF_INTERFACE_MODE_IP)
n_rx += memif_device_input_inline (vm, node, frame, mif,
MEMIF_RING_M2S, dq->queue_id,
- MEMIF_INTERFACE_MODE_IP);
+ mode_ip);
else
n_rx += memif_device_input_inline (vm, node, frame, mif,
MEMIF_RING_M2S, dq->queue_id,
- MEMIF_INTERFACE_MODE_ETHERNET);
+ mode_eth);
}
else
{
if (mif->mode == MEMIF_INTERFACE_MODE_IP)
n_rx += memif_device_input_inline (vm, node, frame, mif,
MEMIF_RING_S2M, dq->queue_id,
- MEMIF_INTERFACE_MODE_IP);
+ mode_ip);
else
n_rx += memif_device_input_inline (vm, node, frame, mif,
MEMIF_RING_S2M, dq->queue_id,
- MEMIF_INTERFACE_MODE_ETHERNET);
+ mode_eth);
}
}
}
void *shm;
memif_region_size_t region_size;
int fd;
+ u8 is_external;
} memif_region_t;
typedef struct
u16 last_head;
u16 last_tail;
+ u32 *buffers;
/* interrupts */
int int_fd;
_(1, IS_SLAVE, "slave") \
_(2, CONNECTING, "connecting") \
_(3, CONNECTED, "connected") \
- _(4, DELETING, "deleting")
+ _(4, DELETING, "deleting") \
+ _(5, ZERO_COPY, "zero-copy") \
+ _(6, ERROR, "error")
typedef enum
{
/* buffer template */
vlib_buffer_t buffer_template;
+ memif_desc_t desc_template;
} memif_per_thread_data_t;
typedef struct
u32 socket_id;
u8 *secret;
u8 is_master;
+ u8 is_zero_copy;
memif_interface_mode_t mode:8;
memif_log2_ring_size_t log2_ring_size;
u16 buffer_size;
if ((err = memif_init_regions_and_queues (mif)))
return err;
memif_msg_enq_init (mif);
- memif_msg_enq_add_region (mif, 0);
+ /* *INDENT-OFF* */
+ vec_foreach_index (i, mif->regions)
+ memif_msg_enq_add_region (mif, i);
vec_foreach_index (i, mif->tx_queues)
memif_msg_enq_add_ring (mif, i, MEMIF_RING_S2M);
vec_foreach_index (i, mif->rx_queues)
memif_msg_enq_add_ring (mif, i, MEMIF_RING_M2S);
+ /* *INDENT-ON* */
memif_msg_enq_connect (mif);
break;
}
}
+/** \brief Free buffers from ring without freeing tail buffers
+
+ @param vm - (vlib_main_t *) vlib main data structure pointer
+ @param buffers - (u32 * ) buffer index ring
+ @param start - (u32) first slot in the ring
+ @param ring_size - (u32) ring size
+ @param n_buffers - (u32) number of buffers
+*/
+always_inline void
+vlib_buffer_free_from_ring_no_next (vlib_main_t * vm, u32 * ring, u32 start,
+ u32 ring_size, u32 n_buffers)
+{
+ ASSERT (n_buffers <= ring_size);
+
+ if (PREDICT_TRUE (start + n_buffers <= ring_size))
+ {
+ vlib_buffer_free (vm, ring + start, n_buffers);
+ }
+ else
+ {
+ vlib_buffer_free_no_next (vm, ring + start, ring_size - start);
+ vlib_buffer_free_no_next (vm, ring, n_buffers - (ring_size - start));
+ }
+}
/* Add/delete buffer free lists. */
vlib_buffer_free_list_index_t vlib_buffer_create_free_list (vlib_main_t * vm,
Code Review / vpp.git / commitdiff