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authorSachin Saxena <sachin.saxena@freescale.com>2018-02-28 20:28:52 +0530
committerSachin Saxena <sachin.saxena@nxp.com>2018-02-28 20:34:56 +0530
commit0689fce93ba269c48f83a2f70f971b3976d04c90 (patch)
tree4cc2908df3598507cc1828ac19d8c43b22450ffa /src/vnet/devices/ssvm
parent746b57564deede624261ab8a96c94f562f24d22c (diff)
parentd594711a5d79859a7d0bde83a516f7ab52051d9b (diff)
Merge branch 'stable/1710' of https://gerrit.fd.io/r/vpp into 17101710
Diffstat (limited to 'src/vnet/devices/ssvm')
-rw-r--r--src/vnet/devices/ssvm/node.c345
-rw-r--r--src/vnet/devices/ssvm/ssvm_eth.c491
-rw-r--r--src/vnet/devices/ssvm/ssvm_eth.h141
3 files changed, 977 insertions, 0 deletions
diff --git a/src/vnet/devices/ssvm/node.c b/src/vnet/devices/ssvm/node.c
new file mode 100644
index 00000000..b7a8db05
--- /dev/null
+++ b/src/vnet/devices/ssvm/node.c
@@ -0,0 +1,345 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "ssvm_eth.h"
+
+vlib_node_registration_t ssvm_eth_input_node;
+
+typedef struct
+{
+ u32 next_index;
+ u32 sw_if_index;
+} ssvm_eth_input_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_ssvm_eth_input_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ ssvm_eth_input_trace_t *t = va_arg (*args, ssvm_eth_input_trace_t *);
+
+ s = format (s, "SSVM_ETH_INPUT: sw_if_index %d, next index %d",
+ t->sw_if_index, t->next_index);
+ return s;
+}
+
+vlib_node_registration_t ssvm_eth_input_node;
+
+#define foreach_ssvm_eth_input_error \
+_(NO_BUFFERS, "Rx packet drops (no buffers)")
+
+typedef enum
+{
+#define _(sym,str) SSVM_ETH_INPUT_ERROR_##sym,
+ foreach_ssvm_eth_input_error
+#undef _
+ SSVM_ETH_INPUT_N_ERROR,
+} ssvm_eth_input_error_t;
+
+static char *ssvm_eth_input_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ssvm_eth_input_error
+#undef _
+};
+
+typedef enum
+{
+ SSVM_ETH_INPUT_NEXT_DROP,
+ SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT,
+ SSVM_ETH_INPUT_NEXT_IP4_INPUT,
+ SSVM_ETH_INPUT_NEXT_IP6_INPUT,
+ SSVM_ETH_INPUT_NEXT_MPLS_INPUT,
+ SSVM_ETH_INPUT_N_NEXT,
+} ssvm_eth_input_next_t;
+
+static inline uword
+ssvm_eth_device_input (ssvm_eth_main_t * em,
+ ssvm_private_t * intfc, vlib_node_runtime_t * node)
+{
+ ssvm_shared_header_t *sh = intfc->sh;
+ vlib_main_t *vm = em->vlib_main;
+ unix_shared_memory_queue_t *q;
+ ssvm_eth_queue_elt_t *elt, *elts;
+ u32 elt_index;
+ u32 my_pid = intfc->my_pid;
+ int rx_queue_index;
+ u32 n_to_alloc = VLIB_FRAME_SIZE * 2;
+ u32 n_allocated, n_present_in_cache;
+ u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+ vlib_buffer_free_list_t *fl;
+ u32 n_left_to_next, *to_next;
+ u32 next0;
+ u32 n_buffers;
+ u32 n_available;
+ u32 bi0, saved_bi0;
+ vlib_buffer_t *b0, *prev;
+ u32 saved_cache_size = 0;
+ ethernet_header_t *eh0;
+ u16 type0;
+ u32 n_rx_bytes = 0, l3_offset0;
+ u32 thread_index = vlib_get_thread_index ();
+ u32 trace_cnt __attribute__ ((unused)) = vlib_get_trace_count (vm, node);
+ volatile u32 *lock;
+ u32 *elt_indices;
+ uword n_trace = vlib_get_trace_count (vm, node);
+
+ /* Either side down? buh-bye... */
+ if (pointer_to_uword (sh->opaque[MASTER_ADMIN_STATE_INDEX]) == 0 ||
+ pointer_to_uword (sh->opaque[SLAVE_ADMIN_STATE_INDEX]) == 0)
+ return 0;
+
+ if (intfc->i_am_master)
+ q = (unix_shared_memory_queue_t *) (sh->opaque[TO_MASTER_Q_INDEX]);
+ else
+ q = (unix_shared_memory_queue_t *) (sh->opaque[TO_SLAVE_Q_INDEX]);
+
+ /* Nothing to do? */
+ if (q->cursize == 0)
+ return 0;
+
+ fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+
+ vec_reset_length (intfc->rx_queue);
+
+ lock = (u32 *) q;
+ while (__sync_lock_test_and_set (lock, 1))
+ ;
+ while (q->cursize > 0)
+ {
+ unix_shared_memory_queue_sub_raw (q, (u8 *) & elt_index);
+ ASSERT (elt_index < 2048);
+ vec_add1 (intfc->rx_queue, elt_index);
+ }
+ CLIB_MEMORY_BARRIER ();
+ *lock = 0;
+
+ n_present_in_cache = vec_len (em->buffer_cache);
+
+ if (vec_len (em->buffer_cache) < vec_len (intfc->rx_queue) * 2)
+ {
+ vec_validate (em->buffer_cache,
+ n_to_alloc + vec_len (em->buffer_cache) - 1);
+ n_allocated =
+ vlib_buffer_alloc (vm, &em->buffer_cache[n_present_in_cache],
+ n_to_alloc);
+
+ n_present_in_cache += n_allocated;
+ _vec_len (em->buffer_cache) = n_present_in_cache;
+ }
+
+ elts = (ssvm_eth_queue_elt_t *) (sh->opaque[CHUNK_POOL_INDEX]);
+
+ n_buffers = vec_len (intfc->rx_queue);
+ rx_queue_index = 0;
+
+ while (n_buffers > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_buffers > 0 && n_left_to_next > 0)
+ {
+ elt = elts + intfc->rx_queue[rx_queue_index];
+
+ saved_cache_size = n_present_in_cache;
+ if (PREDICT_FALSE (saved_cache_size == 0))
+ {
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ goto out;
+ }
+ saved_bi0 = bi0 = em->buffer_cache[--n_present_in_cache];
+ b0 = vlib_get_buffer (vm, bi0);
+ prev = 0;
+
+ while (1)
+ {
+ vlib_buffer_init_for_free_list (b0, fl);
+
+ b0->current_data = elt->current_data_hint;
+ b0->current_length = elt->length_this_buffer;
+ b0->total_length_not_including_first_buffer =
+ elt->total_length_not_including_first_buffer;
+
+ clib_memcpy (b0->data + b0->current_data, elt->data,
+ b0->current_length);
+
+ if (PREDICT_FALSE (prev != 0))
+ prev->next_buffer = bi0;
+
+ if (PREDICT_FALSE (elt->flags & SSVM_BUFFER_NEXT_PRESENT))
+ {
+ prev = b0;
+ if (PREDICT_FALSE (n_present_in_cache == 0))
+ {
+ vlib_put_next_frame (vm, node, next_index,
+ n_left_to_next);
+ goto out;
+ }
+ bi0 = em->buffer_cache[--n_present_in_cache];
+ b0 = vlib_get_buffer (vm, bi0);
+ }
+ else
+ break;
+ }
+
+ saved_cache_size = n_present_in_cache;
+
+ to_next[0] = saved_bi0;
+ to_next++;
+ n_left_to_next--;
+
+ b0 = vlib_get_buffer (vm, saved_bi0);
+ eh0 = vlib_buffer_get_current (b0);
+
+ type0 = clib_net_to_host_u16 (eh0->type);
+
+ next0 = SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT;
+
+ if (type0 == ETHERNET_TYPE_IP4)
+ next0 = SSVM_ETH_INPUT_NEXT_IP4_INPUT;
+ else if (type0 == ETHERNET_TYPE_IP6)
+ next0 = SSVM_ETH_INPUT_NEXT_IP6_INPUT;
+ else if (type0 == ETHERNET_TYPE_MPLS)
+ next0 = SSVM_ETH_INPUT_NEXT_MPLS_INPUT;
+
+ l3_offset0 = ((next0 == SSVM_ETH_INPUT_NEXT_IP4_INPUT ||
+ next0 == SSVM_ETH_INPUT_NEXT_IP6_INPUT ||
+ next0 == SSVM_ETH_INPUT_NEXT_MPLS_INPUT) ?
+ sizeof (ethernet_header_t) : 0);
+
+ n_rx_bytes += b0->current_length
+ + b0->total_length_not_including_first_buffer;
+
+ b0->current_data += l3_offset0;
+ b0->current_length -= l3_offset0;
+ b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
+
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = intfc->vlib_hw_if_index;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+
+ /*
+ * Turn this on if you run into
+ * "bad monkey" contexts, and you want to know exactly
+ * which nodes they've visited... See main.c...
+ */
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+
+ if (PREDICT_FALSE (n_trace > 0))
+ {
+ ssvm_eth_input_trace_t *tr;
+
+ vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 1);
+ vlib_set_trace_count (vm, node, --n_trace);
+
+ tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
+
+ tr->next_index = next0;
+ tr->sw_if_index = intfc->vlib_hw_if_index;
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ n_buffers--;
+ rx_queue_index++;
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+out:
+ if (em->buffer_cache)
+ _vec_len (em->buffer_cache) = saved_cache_size;
+ else
+ ASSERT (saved_cache_size == 0);
+
+ ssvm_lock (sh, my_pid, 2);
+
+ ASSERT (vec_len (intfc->rx_queue) > 0);
+
+ n_available = (u32) pointer_to_uword (sh->opaque[CHUNK_POOL_NFREE]);
+ elt_indices = (u32 *) (sh->opaque[CHUNK_POOL_FREELIST_INDEX]);
+
+ clib_memcpy (&elt_indices[n_available], intfc->rx_queue,
+ vec_len (intfc->rx_queue) * sizeof (u32));
+
+ n_available += vec_len (intfc->rx_queue);
+ sh->opaque[CHUNK_POOL_NFREE] = uword_to_pointer (n_available, void *);
+
+ ssvm_unlock (sh);
+
+ vlib_error_count (vm, node->node_index, SSVM_ETH_INPUT_ERROR_NO_BUFFERS,
+ n_buffers);
+
+ vlib_increment_combined_counter
+ (vnet_get_main ()->interface_main.combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX, thread_index,
+ intfc->vlib_hw_if_index, rx_queue_index, n_rx_bytes);
+
+ vnet_device_increment_rx_packets (thread_index, rx_queue_index);
+
+ return rx_queue_index;
+}
+
+static uword
+ssvm_eth_input_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ ssvm_eth_main_t *em = &ssvm_eth_main;
+ ssvm_private_t *intfc;
+ uword n_rx_packets = 0;
+
+ vec_foreach (intfc, em->intfcs)
+ {
+ n_rx_packets += ssvm_eth_device_input (em, intfc, node);
+ }
+
+ return n_rx_packets;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ssvm_eth_input_node) = {
+ .function = ssvm_eth_input_node_fn,
+ .name = "ssvm_eth_input",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ssvm_eth_input_trace,
+ .type = VLIB_NODE_TYPE_INPUT,
+ .state = VLIB_NODE_STATE_DISABLED,
+
+ .n_errors = ARRAY_LEN(ssvm_eth_input_error_strings),
+ .error_strings = ssvm_eth_input_error_strings,
+
+ .n_next_nodes = SSVM_ETH_INPUT_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [SSVM_ETH_INPUT_NEXT_DROP] = "error-drop",
+ [SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",
+ [SSVM_ETH_INPUT_NEXT_IP4_INPUT] = "ip4-input",
+ [SSVM_ETH_INPUT_NEXT_IP6_INPUT] = "ip6-input",
+ [SSVM_ETH_INPUT_NEXT_MPLS_INPUT] = "mpls-input",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ssvm_eth_input_node, ssvm_eth_input_node_fn)
+/* *INDENT-ON* */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/devices/ssvm/ssvm_eth.c b/src/vnet/devices/ssvm/ssvm_eth.c
new file mode 100644
index 00000000..db4fafa9
--- /dev/null
+++ b/src/vnet/devices/ssvm/ssvm_eth.c
@@ -0,0 +1,491 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "ssvm_eth.h"
+
+ssvm_eth_main_t ssvm_eth_main;
+
+#define foreach_ssvm_eth_tx_func_error \
+_(RING_FULL, "Tx packet drops (ring full)") \
+_(NO_BUFFERS, "Tx packet drops (no buffers)") \
+_(ADMIN_DOWN, "Tx packet drops (admin down)")
+
+typedef enum
+{
+#define _(f,s) SSVM_ETH_TX_ERROR_##f,
+ foreach_ssvm_eth_tx_func_error
+#undef _
+ SSVM_ETH_TX_N_ERROR,
+} ssvm_eth_tx_func_error_t;
+
+static u32 ssvm_eth_flag_change (vnet_main_t * vnm,
+ vnet_hw_interface_t * hi, u32 flags);
+
+int
+ssvm_eth_create (ssvm_eth_main_t * em, u8 * name, int is_master)
+{
+ ssvm_private_t *intfc;
+ void *oldheap;
+ clib_error_t *e;
+ unix_shared_memory_queue_t *q;
+ ssvm_shared_header_t *sh;
+ ssvm_eth_queue_elt_t *elts;
+ u32 *elt_indices;
+ u8 enet_addr[6];
+ int i, rv;
+
+ vec_add2 (em->intfcs, intfc, 1);
+
+ intfc->ssvm_size = em->segment_size;
+ intfc->i_am_master = 1;
+ intfc->name = name;
+ intfc->my_pid = getpid ();
+ if (is_master == 0)
+ {
+ rv = ssvm_slave_init (intfc, 20 /* timeout in seconds */ );
+ if (rv < 0)
+ return rv;
+ goto create_vnet_interface;
+ }
+
+ intfc->requested_va = em->next_base_va;
+ em->next_base_va += em->segment_size;
+ rv = ssvm_master_init (intfc, intfc - em->intfcs /* master index */ );
+
+ if (rv < 0)
+ return rv;
+
+ /* OK, segment created, set up queues and so forth. */
+
+ sh = intfc->sh;
+ oldheap = ssvm_push_heap (sh);
+
+ q = unix_shared_memory_queue_init (em->queue_elts, sizeof (u32),
+ 0 /* consumer pid not interesting */ ,
+ 0 /* signal not sent */ );
+ sh->opaque[TO_MASTER_Q_INDEX] = (void *) q;
+ q = unix_shared_memory_queue_init (em->queue_elts, sizeof (u32),
+ 0 /* consumer pid not interesting */ ,
+ 0 /* signal not sent */ );
+ sh->opaque[TO_SLAVE_Q_INDEX] = (void *) q;
+
+ /*
+ * Preallocate the requested number of buffer chunks
+ * There must be a better way to do this, etc.
+ * Add some slop to avoid pool reallocation, which will not go well
+ */
+ elts = 0;
+ elt_indices = 0;
+
+ vec_validate_aligned (elts, em->nbuffers - 1, CLIB_CACHE_LINE_BYTES);
+ vec_validate_aligned (elt_indices, em->nbuffers - 1, CLIB_CACHE_LINE_BYTES);
+
+ for (i = 0; i < em->nbuffers; i++)
+ elt_indices[i] = i;
+
+ sh->opaque[CHUNK_POOL_INDEX] = (void *) elts;
+ sh->opaque[CHUNK_POOL_FREELIST_INDEX] = (void *) elt_indices;
+ sh->opaque[CHUNK_POOL_NFREE] = (void *) (uword) em->nbuffers;
+
+ ssvm_pop_heap (oldheap);
+
+create_vnet_interface:
+
+ sh = intfc->sh;
+
+ memset (enet_addr, 0, sizeof (enet_addr));
+ enet_addr[0] = 2;
+ enet_addr[1] = 0xFE;
+ enet_addr[2] = is_master;
+ enet_addr[5] = sh->master_index;
+
+ e = ethernet_register_interface
+ (em->vnet_main, ssvm_eth_device_class.index, intfc - em->intfcs,
+ /* ethernet address */ enet_addr,
+ &intfc->vlib_hw_if_index, ssvm_eth_flag_change);
+
+ if (e)
+ {
+ clib_error_report (e);
+ /* $$$$ unmap offending region? */
+ return VNET_API_ERROR_INVALID_INTERFACE;
+ }
+
+ /* Declare link up */
+ vnet_hw_interface_set_flags (em->vnet_main, intfc->vlib_hw_if_index,
+ VNET_HW_INTERFACE_FLAG_LINK_UP);
+
+ /* Let the games begin... */
+ if (is_master)
+ sh->ready = 1;
+ return 0;
+}
+
+static clib_error_t *
+ssvm_config (vlib_main_t * vm, unformat_input_t * input)
+{
+ u8 *name;
+ int is_master = 1;
+ int i, rv;
+ ssvm_eth_main_t *em = &ssvm_eth_main;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "base-va %llx", &em->next_base_va))
+ ;
+ else if (unformat (input, "segment-size %lld", &em->segment_size))
+ em->segment_size = 1ULL << (max_log2 (em->segment_size));
+ else if (unformat (input, "nbuffers %lld", &em->nbuffers))
+ ;
+ else if (unformat (input, "queue-elts %lld", &em->queue_elts))
+ ;
+ else if (unformat (input, "slave"))
+ is_master = 0;
+ else if (unformat (input, "%s", &name))
+ vec_add1 (em->names, name);
+ else
+ break;
+ }
+
+ /* No configured instances, we're done... */
+ if (vec_len (em->names) == 0)
+ return 0;
+
+ for (i = 0; i < vec_len (em->names); i++)
+ {
+ rv = ssvm_eth_create (em, em->names[i], is_master);
+ if (rv < 0)
+ return clib_error_return (0, "ssvm_eth_create '%s' failed, error %d",
+ em->names[i], rv);
+ }
+
+ vlib_node_set_state (vm, ssvm_eth_input_node.index,
+ VLIB_NODE_STATE_POLLING);
+
+ return 0;
+}
+
+VLIB_CONFIG_FUNCTION (ssvm_config, "ssvm_eth");
+
+
+static clib_error_t *
+ssvm_eth_init (vlib_main_t * vm)
+{
+ ssvm_eth_main_t *em = &ssvm_eth_main;
+
+ if (((sizeof (ssvm_eth_queue_elt_t) / CLIB_CACHE_LINE_BYTES)
+ * CLIB_CACHE_LINE_BYTES) != sizeof (ssvm_eth_queue_elt_t))
+ clib_warning ("ssvm_eth_queue_elt_t size %d not a multiple of %d",
+ sizeof (ssvm_eth_queue_elt_t), CLIB_CACHE_LINE_BYTES);
+
+ em->vlib_main = vm;
+ em->vnet_main = vnet_get_main ();
+ em->elog_main = &vm->elog_main;
+
+ /* default config param values... */
+
+ em->next_base_va = 0x600000000ULL;
+ /*
+ * Allocate 2 full superframes in each dir (256 x 2 x 2 x 2048 bytes),
+ * 2mb; double that so we have plenty of space... 4mb
+ */
+ em->segment_size = 8 << 20;
+ em->nbuffers = 1024;
+ em->queue_elts = 512;
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ssvm_eth_init);
+
+static char *ssvm_eth_tx_func_error_strings[] = {
+#define _(n,s) s,
+ foreach_ssvm_eth_tx_func_error
+#undef _
+};
+
+static u8 *
+format_ssvm_eth_device_name (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+
+ s = format (s, "ssvmEthernet%d", i);
+ return s;
+}
+
+static u8 *
+format_ssvm_eth_device (u8 * s, va_list * args)
+{
+ s = format (s, "SSVM Ethernet");
+ return s;
+}
+
+static u8 *
+format_ssvm_eth_tx_trace (u8 * s, va_list * args)
+{
+ s = format (s, "Unimplemented...");
+ return s;
+}
+
+
+static uword
+ssvm_eth_interface_tx (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * f)
+{
+ ssvm_eth_main_t *em = &ssvm_eth_main;
+ vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
+ ssvm_private_t *intfc = vec_elt_at_index (em->intfcs, rd->dev_instance);
+ ssvm_shared_header_t *sh = intfc->sh;
+ unix_shared_memory_queue_t *q;
+ u32 *from;
+ u32 n_left;
+ ssvm_eth_queue_elt_t *elts, *elt, *prev_elt;
+ u32 my_pid = intfc->my_pid;
+ vlib_buffer_t *b0;
+ u32 bi0;
+ u32 size_this_buffer;
+ u32 chunks_this_buffer;
+ u8 i_am_master = intfc->i_am_master;
+ u32 elt_index;
+ int is_ring_full, interface_down;
+ int i;
+ volatile u32 *queue_lock;
+ u32 n_to_alloc = VLIB_FRAME_SIZE;
+ u32 n_allocated, n_present_in_cache, n_available;
+ u32 *elt_indices;
+
+ if (i_am_master)
+ q = (unix_shared_memory_queue_t *) sh->opaque[TO_SLAVE_Q_INDEX];
+ else
+ q = (unix_shared_memory_queue_t *) sh->opaque[TO_MASTER_Q_INDEX];
+
+ queue_lock = (u32 *) q;
+
+ from = vlib_frame_vector_args (f);
+ n_left = f->n_vectors;
+ is_ring_full = 0;
+ interface_down = 0;
+
+ n_present_in_cache = vec_len (em->chunk_cache);
+
+ /* admin / link up/down check */
+ if (sh->opaque[MASTER_ADMIN_STATE_INDEX] == 0 ||
+ sh->opaque[SLAVE_ADMIN_STATE_INDEX] == 0)
+ {
+ interface_down = 1;
+ goto out;
+ }
+
+ ssvm_lock (sh, my_pid, 1);
+
+ elts = (ssvm_eth_queue_elt_t *) (sh->opaque[CHUNK_POOL_INDEX]);
+ elt_indices = (u32 *) (sh->opaque[CHUNK_POOL_FREELIST_INDEX]);
+ n_available = (u32) pointer_to_uword (sh->opaque[CHUNK_POOL_NFREE]);
+
+ if (n_present_in_cache < n_left * 2)
+ {
+ vec_validate (em->chunk_cache, n_to_alloc + n_present_in_cache - 1);
+
+ n_allocated = n_to_alloc < n_available ? n_to_alloc : n_available;
+
+ if (PREDICT_TRUE (n_allocated > 0))
+ {
+ clib_memcpy (&em->chunk_cache[n_present_in_cache],
+ &elt_indices[n_available - n_allocated],
+ sizeof (u32) * n_allocated);
+ }
+
+ n_present_in_cache += n_allocated;
+ n_available -= n_allocated;
+ sh->opaque[CHUNK_POOL_NFREE] = uword_to_pointer (n_available, void *);
+ _vec_len (em->chunk_cache) = n_present_in_cache;
+ }
+
+ ssvm_unlock (sh);
+
+ while (n_left)
+ {
+ bi0 = from[0];
+ b0 = vlib_get_buffer (vm, bi0);
+
+ size_this_buffer = vlib_buffer_length_in_chain (vm, b0);
+ chunks_this_buffer = (size_this_buffer + (SSVM_BUFFER_SIZE - 1))
+ / SSVM_BUFFER_SIZE;
+
+ /* If we're not going to be able to enqueue the buffer, tail drop. */
+ if (q->cursize >= q->maxsize)
+ {
+ is_ring_full = 1;
+ break;
+ }
+
+ prev_elt = 0;
+ elt_index = ~0;
+ for (i = 0; i < chunks_this_buffer; i++)
+ {
+ if (PREDICT_FALSE (n_present_in_cache == 0))
+ goto out;
+
+ elt_index = em->chunk_cache[--n_present_in_cache];
+ elt = elts + elt_index;
+
+ elt->type = SSVM_PACKET_TYPE;
+ elt->flags = 0;
+ elt->total_length_not_including_first_buffer =
+ b0->total_length_not_including_first_buffer;
+ elt->length_this_buffer = b0->current_length;
+ elt->current_data_hint = b0->current_data;
+ elt->owner = !i_am_master;
+ elt->tag = 1;
+
+ clib_memcpy (elt->data, b0->data + b0->current_data,
+ b0->current_length);
+
+ if (PREDICT_FALSE (prev_elt != 0))
+ prev_elt->next_index = elt - elts;
+
+ if (PREDICT_FALSE (i < (chunks_this_buffer - 1)))
+ {
+ elt->flags = SSVM_BUFFER_NEXT_PRESENT;
+ ASSERT (b0->flags & VLIB_BUFFER_NEXT_PRESENT);
+ b0 = vlib_get_buffer (vm, b0->next_buffer);
+ }
+ prev_elt = elt;
+ }
+
+ while (__sync_lock_test_and_set (queue_lock, 1))
+ ;
+
+ unix_shared_memory_queue_add_raw (q, (u8 *) & elt_index);
+ CLIB_MEMORY_BARRIER ();
+ *queue_lock = 0;
+
+ from++;
+ n_left--;
+ }
+
+out:
+ if (PREDICT_FALSE (n_left))
+ {
+ if (is_ring_full)
+ vlib_error_count (vm, node->node_index, SSVM_ETH_TX_ERROR_RING_FULL,
+ n_left);
+ else if (interface_down)
+ vlib_error_count (vm, node->node_index, SSVM_ETH_TX_ERROR_ADMIN_DOWN,
+ n_left);
+ else
+ vlib_error_count (vm, node->node_index, SSVM_ETH_TX_ERROR_NO_BUFFERS,
+ n_left);
+
+ vlib_buffer_free (vm, from, n_left);
+ }
+ else
+ vlib_buffer_free (vm, vlib_frame_vector_args (f), f->n_vectors);
+
+ if (PREDICT_TRUE (vec_len (em->chunk_cache)))
+ _vec_len (em->chunk_cache) = n_present_in_cache;
+
+ return f->n_vectors;
+}
+
+static void
+ssvm_eth_clear_hw_interface_counters (u32 instance)
+{
+ /* Nothing for now */
+}
+
+static clib_error_t *
+ssvm_eth_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
+ u32 flags)
+{
+ vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
+ uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+ ssvm_eth_main_t *em = &ssvm_eth_main;
+ ssvm_private_t *intfc = vec_elt_at_index (em->intfcs, hif->dev_instance);
+ ssvm_shared_header_t *sh;
+
+ /* publish link-state in shared-memory, to discourage buffer-wasting */
+ sh = intfc->sh;
+ if (intfc->i_am_master)
+ sh->opaque[MASTER_ADMIN_STATE_INDEX] = (void *) is_up;
+ else
+ sh->opaque[SLAVE_ADMIN_STATE_INDEX] = (void *) is_up;
+
+ return 0;
+}
+
+static clib_error_t *
+ssvm_eth_subif_add_del_function (vnet_main_t * vnm,
+ u32 hw_if_index,
+ struct vnet_sw_interface_t *st, int is_add)
+{
+ /* Nothing for now */
+ return 0;
+}
+
+/*
+ * Dynamically redirect all pkts from a specific interface
+ * to the specified node
+ */
+static void
+ssvm_eth_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
+ u32 node_index)
+{
+ ssvm_eth_main_t *em = &ssvm_eth_main;
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+ ssvm_private_t *intfc = pool_elt_at_index (em->intfcs, hw->dev_instance);
+
+ /* Shut off redirection */
+ if (node_index == ~0)
+ {
+ intfc->per_interface_next_index = node_index;
+ return;
+ }
+
+ intfc->per_interface_next_index =
+ vlib_node_add_next (em->vlib_main, ssvm_eth_input_node.index, node_index);
+}
+
+static u32
+ssvm_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
+{
+ /* nothing for now */
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VNET_DEVICE_CLASS (ssvm_eth_device_class) = {
+ .name = "ssvm-eth",
+ .tx_function = ssvm_eth_interface_tx,
+ .tx_function_n_errors = SSVM_ETH_TX_N_ERROR,
+ .tx_function_error_strings = ssvm_eth_tx_func_error_strings,
+ .format_device_name = format_ssvm_eth_device_name,
+ .format_device = format_ssvm_eth_device,
+ .format_tx_trace = format_ssvm_eth_tx_trace,
+ .clear_counters = ssvm_eth_clear_hw_interface_counters,
+ .admin_up_down_function = ssvm_eth_interface_admin_up_down,
+ .subif_add_del_function = ssvm_eth_subif_add_del_function,
+ .rx_redirect_to_node = ssvm_eth_set_interface_next_node,
+};
+
+VLIB_DEVICE_TX_FUNCTION_MULTIARCH (ssvm_eth_device_class,
+ ssvm_eth_interface_tx)
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/devices/ssvm/ssvm_eth.h b/src/vnet/devices/ssvm/ssvm_eth.h
new file mode 100644
index 00000000..f877df3c
--- /dev/null
+++ b/src/vnet/devices/ssvm/ssvm_eth.h
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __included_ssvm_eth_h__
+#define __included_ssvm_eth_h__
+
+#include <vnet/vnet.h>
+
+#include <vppinfra/elog.h>
+#include <vppinfra/error.h>
+#include <vppinfra/format.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/vec.h>
+#include <vppinfra/elog.h>
+#include <vlib/vlib.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/devices/devices.h>
+#include <vnet/ip/ip.h>
+#include <vnet/pg/pg.h>
+#include <vlibmemory/unix_shared_memory_queue.h>
+
+#include <svm/ssvm.h>
+
+extern vnet_device_class_t ssvm_eth_device_class;
+extern vlib_node_registration_t ssvm_eth_input_node;
+
+#define SSVM_BUFFER_SIZE \
+ (VLIB_BUFFER_DATA_SIZE + VLIB_BUFFER_PRE_DATA_SIZE)
+#define SSVM_PACKET_TYPE 1
+
+typedef struct
+{
+ /* Type of queue element */
+ u8 type;
+ u8 flags;
+#define SSVM_BUFFER_NEXT_PRESENT (1<<0)
+ u8 owner;
+ u8 tag;
+ i16 current_data_hint;
+ u16 length_this_buffer;
+ u16 total_length_not_including_first_buffer;
+ u16 pad;
+ u32 next_index;
+ /* offset 16 */
+ u8 data[SSVM_BUFFER_SIZE];
+ /* pad to an even multiple of 64 octets */
+ u8 pad2[CLIB_CACHE_LINE_BYTES - 16];
+} ssvm_eth_queue_elt_t;
+
+typedef struct
+{
+ /* vector of point-to-point connections */
+ ssvm_private_t *intfcs;
+
+ u32 *buffer_cache;
+ u32 *chunk_cache;
+
+ /* Configurable parameters */
+ /* base address for next placement */
+ u64 next_base_va;
+ u64 segment_size;
+ u64 nbuffers;
+ u64 queue_elts;
+
+ /* Segment names */
+ u8 **names;
+
+ /* convenience */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+ elog_main_t *elog_main;
+} ssvm_eth_main_t;
+
+ssvm_eth_main_t ssvm_eth_main;
+
+typedef enum
+{
+ CHUNK_POOL_FREELIST_INDEX = 0,
+ CHUNK_POOL_INDEX,
+ CHUNK_POOL_NFREE,
+ TO_MASTER_Q_INDEX,
+ TO_SLAVE_Q_INDEX,
+ MASTER_ADMIN_STATE_INDEX,
+ SLAVE_ADMIN_STATE_INDEX,
+} ssvm_eth_opaque_index_t;
+
+/*
+ * debug scaffolding.
+ */
+static inline void
+ssvm_eth_validate_freelists (int need_lock)
+{
+#if CLIB_DEBUG > 0
+ ssvm_eth_main_t *em = &ssvm_eth_main;
+ ssvm_private_t *intfc;
+ ssvm_shared_header_t *sh;
+ u32 *elt_indices;
+ u32 n_available;
+ int i;
+
+ for (i = 0; i < vec_len (em->intfcs); i++)
+ {
+ intfc = em->intfcs + i;
+ sh = intfc->sh;
+ u32 my_pid = intfc->my_pid;
+
+ if (need_lock)
+ ssvm_lock (sh, my_pid, 15);
+
+ elt_indices = (u32 *) (sh->opaque[CHUNK_POOL_FREELIST_INDEX]);
+ n_available = (u32) (uword) (sh->opaque[CHUNK_POOL_NFREE]);
+
+ for (i = 0; i < n_available; i++)
+ ASSERT (elt_indices[i] < 2048);
+
+ if (need_lock)
+ ssvm_unlock (sh);
+ }
+#endif
+}
+
+#endif /* __included_ssvm_eth_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */