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-rw-r--r--src/vnet/dev/api.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/src/vnet/dev/api.c b/src/vnet/dev/api.c
new file mode 100644
index 00000000000..4d556c72367
--- /dev/null
+++ b/src/vnet/dev/api.c
@@ -0,0 +1,241 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright (c) 2023 Cisco Systems, Inc.
+ */
+
+#include "vppinfra/pool.h"
+#include <vnet/vnet.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/dev/dev.h>
+#include <vnet/dev/counters.h>
+#include <vnet/dev/log.h>
+#include <vnet/dev/api.h>
+
+VLIB_REGISTER_LOG_CLASS (dev_log, static) = {
+ .class_name = "dev",
+ .subclass_name = "api",
+};
+
+static int
+_vnet_dev_queue_size_validate (u32 size, vnet_dev_queue_config_t c)
+{
+ if (size < c.min_size)
+ return 0;
+ if (size > c.max_size)
+ return 0;
+ if (c.size_is_power_of_two && count_set_bits (size) != 1)
+ return 0;
+ if (c.multiplier && size % c.multiplier)
+ return 0;
+
+ return 1;
+}
+
+vnet_dev_rv_t
+vnet_dev_api_attach (vlib_main_t *vm, vnet_dev_api_attach_args_t *args)
+{
+ vnet_dev_main_t *dm = &vnet_dev_main;
+ vnet_dev_t *dev = 0;
+ vnet_dev_rv_t rv = VNET_DEV_OK;
+ vnet_dev_bus_t *bus;
+ vnet_dev_driver_t *driver;
+ void *bus_dev_info = 0;
+ u8 *dev_desc = 0;
+
+ log_debug (0, "%s driver %s flags '%U' args '%v'", args->device_id,
+ args->driver_name, format_vnet_dev_flags, &args->flags,
+ args->args);
+
+ if (vnet_dev_by_id (args->device_id))
+ return VNET_DEV_ERR_ALREADY_IN_USE;
+
+ bus = vnet_dev_find_device_bus (vm, args->device_id);
+ if (!bus)
+ {
+ log_err (dev, "unknown bus");
+ rv = VNET_DEV_ERR_INVALID_BUS;
+ goto done;
+ }
+
+ bus_dev_info = vnet_dev_get_device_info (vm, args->device_id);
+ if (!bus_dev_info)
+ {
+ log_err (dev, "invalid or unsupported device id");
+ rv = VNET_DEV_ERR_INVALID_DEVICE_ID;
+ goto done;
+ }
+
+ vec_foreach (driver, dm->drivers)
+ {
+ if (args->driver_name[0] &&
+ strcmp (args->driver_name, driver->registration->name))
+ continue;
+ if (driver->ops.probe &&
+ (dev_desc = driver->ops.probe (vm, bus->index, bus_dev_info)))
+ break;
+ }
+
+ if (!dev_desc)
+ {
+ log_err (dev, "driver not available for %s", args->device_id);
+ rv = VNET_DEV_ERR_DRIVER_NOT_AVAILABLE;
+ goto done;
+ }
+
+ dev = vnet_dev_alloc (vm, args->device_id, driver);
+ if (!dev)
+ {
+ log_err (dev, "dev alloc failed for %s", args->device_id);
+ rv = VNET_DEV_ERR_BUG;
+ goto done;
+ }
+ dev->description = dev_desc;
+
+ if ((args->flags.e & VNET_DEV_F_NO_STATS) == 0)
+ dev->poll_stats = 1;
+
+ log_debug (0, "found '%v'", dev->description);
+
+ rv = vnet_dev_process_call_op (vm, dev, vnet_dev_init);
+
+done:
+ if (bus_dev_info)
+ bus->ops.free_device_info (vm, bus_dev_info);
+
+ if (rv != VNET_DEV_OK && dev)
+ vnet_dev_process_call_op_no_rv (vm, dev, vnet_dev_free);
+
+ return rv;
+}
+
+vnet_dev_rv_t
+vnet_dev_api_detach (vlib_main_t *vm, vnet_dev_api_detach_args_t *args)
+{
+ vnet_dev_t *dev = vnet_dev_by_id (args->device_id);
+
+ log_debug (dev, "detach");
+
+ if (dev)
+ return vnet_dev_process_call_op_no_rv (vm, dev, vnet_dev_detach);
+
+ return VNET_DEV_ERR_NOT_FOUND;
+}
+
+vnet_dev_rv_t
+vnet_dev_api_reset (vlib_main_t *vm, vnet_dev_api_reset_args_t *args)
+{
+ vnet_dev_t *dev = vnet_dev_by_id (args->device_id);
+
+ log_debug (dev, "detach");
+
+ if (!dev)
+ return VNET_DEV_ERR_NOT_FOUND;
+
+ if (dev->ops.reset)
+ return VNET_DEV_ERR_NOT_SUPPORTED;
+
+ return vnet_dev_process_call_op (vm, dev, vnet_dev_reset);
+}
+
+vnet_dev_rv_t
+vnet_dev_api_create_port_if (vlib_main_t *vm,
+ vnet_dev_api_create_port_if_args_t *args)
+{
+ vnet_dev_t *dev = vnet_dev_by_id (args->device_id);
+ vnet_dev_port_t *port = 0;
+ u16 n_threads = vlib_get_n_threads ();
+
+ log_debug (dev,
+ "create_port_if: device '%s' port %u intf_name '%s' num_rx_q %u "
+ "num_tx_q %u rx_q_sz %u tx_q_sz %u, flags '%U' args '%v'",
+ args->device_id, args->port_id, args->intf_name,
+ args->num_rx_queues, args->num_tx_queues, args->rx_queue_size,
+ args->tx_queue_size, format_vnet_dev_port_flags, &args->flags,
+ args->args);
+
+ if (dev == 0)
+ return VNET_DEV_ERR_NOT_FOUND;
+
+ foreach_vnet_dev_port (p, dev)
+ if (p->port_id == args->port_id)
+ {
+ port = p;
+ break;
+ }
+
+ if (!port)
+ return VNET_DEV_ERR_INVALID_DEVICE_ID;
+
+ if (port->interface_created)
+ return VNET_DEV_ERR_ALREADY_EXISTS;
+
+ if (args->num_rx_queues)
+ {
+ if (args->num_rx_queues > port->attr.max_rx_queues)
+ return VNET_DEV_ERR_INVALID_NUM_RX_QUEUES;
+ port->intf.num_rx_queues = args->num_rx_queues;
+ }
+ else
+ port->intf.num_rx_queues = clib_min (port->attr.max_tx_queues, 1);
+
+ if (args->num_tx_queues)
+ {
+ if (args->num_tx_queues > port->attr.max_tx_queues)
+ return VNET_DEV_ERR_INVALID_NUM_TX_QUEUES;
+ port->intf.num_tx_queues = args->num_tx_queues;
+ }
+ else
+ port->intf.num_tx_queues = clib_min (port->attr.max_tx_queues, n_threads);
+
+ if (args->rx_queue_size)
+ {
+ if (!_vnet_dev_queue_size_validate (args->rx_queue_size,
+ port->rx_queue_config))
+ return VNET_DEV_ERR_INVALID_RX_QUEUE_SIZE;
+ port->intf.rxq_sz = args->rx_queue_size;
+ }
+ else
+ port->intf.rxq_sz = port->rx_queue_config.default_size;
+
+ if (args->tx_queue_size)
+ {
+ if (!_vnet_dev_queue_size_validate (args->tx_queue_size,
+ port->tx_queue_config))
+ return VNET_DEV_ERR_INVALID_TX_QUEUE_SIZE;
+ port->intf.txq_sz = args->tx_queue_size;
+ }
+ else
+ port->intf.txq_sz = port->tx_queue_config.default_size;
+
+ clib_memcpy (port->intf.name, args->intf_name, sizeof (port->intf.name));
+
+ return vnet_dev_process_call_port_op (vm, port, vnet_dev_port_if_create);
+}
+
+vnet_dev_rv_t
+vnet_dev_api_remove_port_if (vlib_main_t *vm,
+ vnet_dev_api_remove_port_if_args_t *args)
+{
+ vnet_dev_main_t *dm = &vnet_dev_main;
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_sw_interface_t *si;
+ vnet_hw_interface_t *hi;
+ vnet_dev_port_t *port;
+
+ si = vnet_get_sw_interface_or_null (vnm, args->sw_if_index);
+ if (!si)
+ return VNET_DEV_ERR_UNKNOWN_INTERFACE;
+
+ hi = vnet_get_hw_interface_or_null (vnm, si->hw_if_index);
+ if (!hi)
+ return VNET_DEV_ERR_UNKNOWN_INTERFACE;
+
+ if (pool_is_free_index (dm->ports_by_dev_instance, hi->dev_instance))
+ return VNET_DEV_ERR_UNKNOWN_INTERFACE;
+
+ port = vnet_dev_get_port_from_dev_instance (hi->dev_instance);
+
+ if (port->intf.hw_if_index != si->hw_if_index)
+ return VNET_DEV_ERR_UNKNOWN_INTERFACE;
+
+ return vnet_dev_process_call_port_op (vm, port, vnet_dev_port_if_remove);
+}