vhost_user_intf_t *vui;
vhost_cpu_t *vhc;
u32 *workers = 0;
+ u32 cpu_index;
+ vlib_main_t *vm;
//Let's list all workers cpu indexes
u32 i;
continue;
i %= vec_len (vui_workers);
- u32 cpu_index = vui_workers[i];
+ cpu_index = vui_workers[i];
i++;
vhc = &vum->cpus[cpu_index];
iaq.qid = qid;
iaq.vhost_iface_index = vui - vum->vhost_user_interfaces;
vec_add1 (vhc->rx_queues, iaq);
- vlib_node_set_state (vlib_mains[cpu_index],
- vhost_user_input_node.index,
- VLIB_NODE_STATE_POLLING);
}
});
/* *INDENT-ON* */
+
+ vec_foreach (vhc, vum->cpus)
+ {
+ vhost_iface_and_queue_t *vhiq;
+ u8 mode = VHOST_USER_INTERRUPT_MODE;
+
+ vec_foreach (vhiq, vhc->rx_queues)
+ {
+ vui = &vum->vhost_user_interfaces[vhiq->vhost_iface_index];
+ if (vui->operation_mode == VHOST_USER_POLLING_MODE)
+ {
+ /* At least one interface is polling, cpu is set to polling */
+ mode = VHOST_USER_POLLING_MODE;
+ break;
+ }
+ }
+ vhc->operation_mode = mode;
+ }
+
+ for (cpu_index = vum->input_cpu_first_index;
+ cpu_index < vum->input_cpu_first_index + vum->input_cpu_count;
+ cpu_index++)
+ {
+ vlib_node_state_t state = VLIB_NODE_STATE_POLLING;
+
+ vhc = &vum->cpus[cpu_index];
+ vm = vlib_mains ? vlib_mains[cpu_index] : &vlib_global_main;
+ switch (vhc->operation_mode)
+ {
+ case VHOST_USER_INTERRUPT_MODE:
+ state = VLIB_NODE_STATE_INTERRUPT;
+ break;
+ case VHOST_USER_POLLING_MODE:
+ state = VLIB_NODE_STATE_POLLING;
+ break;
+ default:
+ clib_warning ("BUG: bad operation mode %d", vhc->operation_mode);
+ break;
+ }
+ vlib_node_set_state (vm, vhost_user_input_node.index, state);
+ }
+
+ vec_free (workers);
}
static int
vhost_user_tx_thread_placement (vui);
}
+static void
+vhost_user_set_interrupt_pending (vhost_user_intf_t * vui, u32 ifq)
+{
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_cpu_t *vhc;
+ u32 cpu_index;
+ vhost_iface_and_queue_t *vhiq;
+ vlib_main_t *vm;
+ u32 ifq2;
+ u8 done = 0;
+
+ if (vhost_user_intf_ready (vui))
+ {
+ vec_foreach (vhc, vum->cpus)
+ {
+ if (vhc->operation_mode == VHOST_USER_POLLING_MODE)
+ continue;
+
+ vec_foreach (vhiq, vhc->rx_queues)
+ {
+ /*
+ * Match the interface and the virtqueue number
+ */
+ if ((vhiq->vhost_iface_index == (ifq >> 8)) &&
+ (VHOST_VRING_IDX_TX (vhiq->qid) == (ifq & 0xff)))
+ {
+ cpu_index = vhc - vum->cpus;
+ vm = vlib_mains ? vlib_mains[cpu_index] : &vlib_global_main;
+ /*
+ * Convert RX virtqueue number in the lower byte to vring
+ * queue index for the input node process. Top bytes contain
+ * the interface, lower byte contains the queue index.
+ */
+ ifq2 = ((ifq >> 8) << 8) | vhiq->qid;
+ vhc->pending_input_bitmap =
+ clib_bitmap_set (vhc->pending_input_bitmap, ifq2, 1);
+ vlib_node_set_interrupt_pending (vm,
+ vhost_user_input_node.index);
+ done = 1;
+ break;
+ }
+ }
+ if (done)
+ break;
+ }
+ }
+}
+
static clib_error_t *
vhost_user_callfd_read_ready (unix_file_t * uf)
{
__attribute__ ((unused)) int n;
u8 buff[8];
+ vhost_user_intf_t *vui =
+ pool_elt_at_index (vhost_user_main.vhost_user_interfaces,
+ uf->private_data >> 8);
+
n = read (uf->file_descriptor, ((char *) &buff), 8);
+ DBG_SOCK ("if %d CALL queue %d", uf->private_data >> 8,
+ uf->private_data & 0xff);
+ vhost_user_set_interrupt_pending (vui, uf->private_data);
+
return 0;
}
pool_elt_at_index (vhost_user_main.vhost_user_interfaces,
uf->private_data >> 8);
u32 qid = uf->private_data & 0xff;
+
n = read (uf->file_descriptor, ((char *) &buff), 8);
DBG_SOCK ("if %d KICK queue %d", uf->private_data >> 8, qid);
vlib_worker_thread_barrier_sync (vlib_get_main ());
- vui->vrings[qid].started = 1;
- vhost_user_update_iface_state (vui);
+ if (!vui->vrings[qid].started ||
+ (vhost_user_intf_ready (vui) != vui->is_up))
+ {
+ vui->vrings[qid].started = 1;
+ vhost_user_update_iface_state (vui);
+ }
vlib_worker_thread_barrier_release (vlib_get_main ());
+
+ vhost_user_set_interrupt_pending (vui, uf->private_data);
return 0;
}
vui->vrings[msg.state.index].last_avail_idx =
vui->vrings[msg.state.index].used->idx;
- /* tell driver that we don't want interrupts */
- vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY;
+ if (vui->operation_mode == VHOST_USER_POLLING_MODE)
+ /* tell driver that we don't want interrupts */
+ vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY;
+ else
+ /* tell driver that we want interrupts */
+ vui->vrings[msg.state.index].used->flags = 0;
break;
case VHOST_USER_SET_OWNER:
vhost_user_log_dirty_ring (vui, txvq, idx);
/* interrupt (call) handling */
- if ((txvq->callfd_idx != ~0) && !(txvq->avail->flags & 1))
+ if ((txvq->callfd_idx != ~0) &&
+ !(txvq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
{
txvq->n_since_last_int += n_rx_packets;
vhost_user_main_t *vum = &vhost_user_main;
uword n_rx_packets = 0;
u32 cpu_index = os_get_cpu_number ();
+ vhost_iface_and_queue_t *vhiq;
+ vhost_user_intf_t *vui;
+ vhost_cpu_t *vhc;
+ vhc = &vum->cpus[cpu_index];
+ if (PREDICT_TRUE (vhc->operation_mode == VHOST_USER_POLLING_MODE))
+ {
+ vec_foreach (vhiq, vum->cpus[cpu_index].rx_queues)
+ {
+ vui = &vum->vhost_user_interfaces[vhiq->vhost_iface_index];
+ n_rx_packets += vhost_user_if_input (vm, vum, vui, vhiq->qid, node);
+ }
+ }
+ else
+ {
+ int i;
- vhost_iface_and_queue_t *vhiq;
- vec_foreach (vhiq, vum->cpus[cpu_index].rx_queues)
- {
- vhost_user_intf_t *vui =
- &vum->vhost_user_interfaces[vhiq->vhost_iface_index];
- n_rx_packets += vhost_user_if_input (vm, vum, vui, vhiq->qid, node);
- }
+ /* *INDENT-OFF* */
+ clib_bitmap_foreach (i, vhc->pending_input_bitmap, ({
+ int qid = i & 0xff;
+ clib_bitmap_set (vhc->pending_input_bitmap, i, 0);
+ vui = pool_elt_at_index (vum->vhost_user_interfaces, i >> 8);
+ n_rx_packets += vhost_user_if_input (vm, vum, vui, qid, node);
+ }));
+ /* *INDENT-ON* */
+ }
return n_rx_packets;
}
}
/* interrupt (call) handling */
- if ((rxvq->callfd_idx != ~0) && !(rxvq->avail->flags & 1))
+ if ((rxvq->callfd_idx != ~0) &&
+ !(rxvq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
{
rxvq->n_since_last_int += frame->n_vectors - n_left;
vhost_user_tx_thread_placement (vui);
}
+static uword
+vhost_user_send_interrupt_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+ vhost_user_intf_t *vui;
+ f64 timeout = 3153600000.0 /* 100 years */ ;
+ uword event_type, *event_data = 0;
+ vhost_user_main_t *vum = &vhost_user_main;
+ vhost_iface_and_queue_t *vhiq;
+ vhost_cpu_t *vhc;
+ f64 now, poll_time_remaining;
+
+ while (1)
+ {
+ poll_time_remaining =
+ vlib_process_wait_for_event_or_clock (vm, timeout);
+ event_type = vlib_process_get_events (vm, &event_data);
+ vec_reset_length (event_data);
+
+ /*
+ * Use the remaining timeout if it is less than coalesce time to avoid
+ * resetting the existing timer in the middle of expiration
+ */
+ timeout = poll_time_remaining;
+ if (vlib_process_suspend_time_is_zero (timeout) ||
+ (timeout > vum->coalesce_time))
+ timeout = vum->coalesce_time;
+
+ now = vlib_time_now (vm);
+ switch (event_type)
+ {
+ case VHOST_USER_EVENT_START_TIMER:
+ if (!vlib_process_suspend_time_is_zero (poll_time_remaining))
+ break;
+ /* fall through */
+
+ case ~0:
+ vec_foreach (vhc, vum->cpus)
+ {
+ u32 cpu_index = vhc - vum->cpus;
+ f64 next_timeout;
+
+ next_timeout = timeout;
+ vec_foreach (vhiq, vum->cpus[cpu_index].rx_queues)
+ {
+ vui = &vum->vhost_user_interfaces[vhiq->vhost_iface_index];
+ vhost_user_vring_t *rxvq =
+ &vui->vrings[VHOST_VRING_IDX_RX (vhiq->qid)];
+ vhost_user_vring_t *txvq =
+ &vui->vrings[VHOST_VRING_IDX_TX (vhiq->qid)];
+
+ if (txvq->n_since_last_int)
+ {
+ if (now >= txvq->int_deadline)
+ vhost_user_send_call (vm, txvq);
+ else
+ next_timeout = txvq->int_deadline - now;
+ }
+
+ if (rxvq->n_since_last_int)
+ {
+ if (now >= rxvq->int_deadline)
+ vhost_user_send_call (vm, rxvq);
+ else
+ next_timeout = rxvq->int_deadline - now;
+ }
+
+ if ((next_timeout < timeout) && (next_timeout > 0.0))
+ timeout = next_timeout;
+ }
+ }
+ break;
+
+ default:
+ clib_warning ("BUG: unhandled event type %d", event_type);
+ break;
+ }
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vhost_user_send_interrupt_node,static) = {
+ .function = vhost_user_send_interrupt_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "vhost-user-send-interrupt-process",
+};
+/* *INDENT-ON* */
+
int
vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
const char *sock_filename,
u32 sw_if_idx = ~0;
int rv = 0;
int server_sock_fd = -1;
+ vhost_user_main_t *vum = &vhost_user_main;
- if (operation_mode != VHOST_USER_POLLING_MODE)
+ if ((operation_mode != VHOST_USER_POLLING_MODE) &&
+ (operation_mode != VHOST_USER_INTERRUPT_MODE))
return VNET_API_ERROR_UNIMPLEMENTED;
if (sock_filename == NULL || !(strlen (sock_filename) > 0))
// Process node must connect
vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
+
+ if ((operation_mode == VHOST_USER_INTERRUPT_MODE) &&
+ !vum->interrupt_mode && (vum->coalesce_time > 0.0) &&
+ (vum->coalesce_frames > 0))
+ {
+ vum->interrupt_mode = 1;
+ vlib_process_signal_event (vm, vhost_user_send_interrupt_node.index,
+ VHOST_USER_EVENT_START_TIMER, 0);
+ }
return rv;
}
int rv = 0;
vnet_hw_interface_t *hwif;
- if (operation_mode != VHOST_USER_POLLING_MODE)
+ if ((operation_mode != VHOST_USER_POLLING_MODE) &&
+ (operation_mode != VHOST_USER_INTERRUPT_MODE))
return VNET_API_ERROR_UNIMPLEMENTED;
if (!(hwif = vnet_get_sup_hw_interface (vnm, sw_if_index)) ||
hwif->dev_class_index != vhost_user_dev_class.index)
// Process node must connect
vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
+
+ if ((operation_mode == VHOST_USER_INTERRUPT_MODE) &&
+ !vum->interrupt_mode && (vum->coalesce_time > 0.0) &&
+ (vum->coalesce_frames > 0))
+ {
+ vum->interrupt_mode = 1;
+ vlib_process_signal_event (vm, vhost_user_send_interrupt_node.index,
+ VHOST_USER_EVENT_START_TIMER, 0);
+ }
return rv;
}
+static uword
+unformat_vhost_user_operation_mode (unformat_input_t * input, va_list * args)
+{
+ u8 *operation_mode = va_arg (*args, u8 *);
+ uword rc = 1;
+
+ if (unformat (input, "interrupt"))
+ *operation_mode = VHOST_USER_INTERRUPT_MODE;
+ else if (unformat (input, "polling"))
+ *operation_mode = VHOST_USER_POLLING_MODE;
+ else
+ rc = 0;
+
+ return rc;
+}
+
clib_error_t *
vhost_user_connect_command_fn (vlib_main_t * vm,
unformat_input_t * input,
{
renumber = 1;
}
+ else if (unformat (line_input, "mode %U",
+ unformat_vhost_user_operation_mode, &operation_mode))
+ ;
else
{
error = clib_error_return (0, "unknown input `%U'",
return rv;
}
+static u8 *
+format_vhost_user_operation_mode (u8 * s, va_list * va)
+{
+ int operation_mode = va_arg (*va, int);
+
+ switch (operation_mode)
+ {
+ case VHOST_USER_POLLING_MODE:
+ s = format (s, "%s", "polling");
+ break;
+ case VHOST_USER_INTERRUPT_MODE:
+ s = format (s, "%s", "interrupt");
+ break;
+ default:
+ s = format (s, "%s", "invalid");
+ }
+ return s;
+}
+
clib_error_t *
show_vhost_user_command_fn (vlib_main_t * vm,
unformat_input_t * input,
(vui->unix_server_index != ~0) ? "server" : "client",
strerror (vui->sock_errno));
+ vlib_cli_output (vm, " configured mode: %U\n",
+ format_vhost_user_operation_mode, vui->operation_mode);
vlib_cli_output (vm, " rx placement: ");
vec_foreach (vhc, vum->cpus)
{
vec_foreach (vhiq, vhc->rx_queues)
{
if (vhiq->vhost_iface_index == vui - vum->vhost_user_interfaces)
- vlib_cli_output (vm, " thread %d on vring %d\n",
- vhc - vum->cpus, VHOST_VRING_IDX_TX (vhiq->qid));
+ {
+ vlib_cli_output (vm, " thread %d on vring %d\n",
+ vhc - vum->cpus,
+ VHOST_VRING_IDX_TX (vhiq->qid));
+ vlib_cli_output (vm, " mode: %U\n",
+ format_vhost_user_operation_mode,
+ vhc->operation_mode);
+ }
}
}
* in the name to be specified. If instance already exists, name will be used
* anyway and multiple instances will have the same name. Use with caution.
*
+ * - <b>mode [interrupt | polling]</b> - Optional parameter specifying
+ * the input thread polling policy.
+ *
* @cliexpar
* Example of how to create a vhost interface with VPP as the client and all features enabled:
* @cliexstart{create vhost-user socket /tmp/vhost1.sock}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
.path = "create vhost-user",
- .short_help = "create vhost-user socket <socket-filename> [server] [feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>]",
+ .short_help = "create vhost-user socket <socket-filename> [server] "
+ "[feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>] "
+ "[mode {interrupt | polling}]",
.function = vhost_user_connect_command_fn,
};
/* *INDENT-ON* */
Code Review / vpp.git / blobdiff