| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| library fuchsia.hardware.ethernet; |
| |
| using zx; |
| |
| const uint32 ETH_MAC_SIZE = 6; // bytes |
| const uint32 ETH_MTU_SIZE = 1500; // bytes |
| const uint32 ETH_FRAME_MAX_HDR_SIZE = 18; // bytes. MAC Dest(6) + MAC Src(6) + 802.1Q tag(4) + Ethertype(2) |
| const uint32 ETH_FRAME_MAX_SIZE = 1518; |
| |
| /// The ethernet interface supports both synchronous and asynchronous transmissions using the |
| /// proto->queue_tx() and ifc->complete_tx() methods. |
| /// |
| /// Receive operations are supported with the ifc->recv() interface. |
| // TODO: implement netbuf-based receive operations by implementing proto->queue_rx() and |
| // ifc->complete_rx() |
| /// |
| /// The FEATURE_WLAN flag indicates a device that supports wlan operations. |
| /// |
| /// The FEATURE_SYNTH flag indicates a device that is not backed by hardware. |
| /// |
| /// The FEATURE_DMA flag indicates that the device can copy the buffer data using DMA and will ensure |
| /// that physical addresses are provided in netbufs. |
| enum EthernetFeature : uint32 { |
| WLAN = 0x1; |
| SYNTH = 0x2; |
| DMA = 0x4; |
| }; |
| |
| const uint32 ETHERNET_STATUS_ONLINE = 0x1; |
| |
| struct EthernetInfo { |
| uint32 features; |
| uint32 mtu; |
| array<uint8>:ETH_MAC_SIZE mac; |
| array<uint8>:2 reserved0; |
| uint64 netbuf_size; |
| array<uint32>:2 reserved1; |
| }; |
| |
| /// Note that this struct may have a private section encoded after it. Allocator much call parent |
| /// device's |Query| to get the correct size. |
| struct EthernetNetbuf { |
| /// Provided by the generic ethernet driver. |
| vector<voidptr> data; |
| /// Only used if ETHERNET_FEATURE_DMA is available. |
| zx.paddr phys; |
| uint16 reserved; |
| uint32 flags; |
| }; |
| |
| [Layout = "ddk-interface"] |
| protocol EthernetIfc { |
| /// Value with bits set from the |ETHERNET_STATUS_*| flags |
| Status(uint32 status) -> (); |
| |
| Recv(vector<voidptr> data, uint32 flags) -> (); |
| |
| }; |
| |
| struct EthDevMetadata { |
| uint32 vid; |
| uint32 pid; |
| uint32 did; |
| }; |
| |
| /// Indicates that additional data is available to be sent after this call finishes. Allows an ethernet |
| /// driver to batch tx to hardware if possible. |
| const uint32 ETHERNET_TX_OPT_MORE = 1; |
| |
| /// SETPARAM_ values identify the parameter to set. Each call to set_param() |
| /// takes an int32_t |value| and voidptr* |data| which have meaning specific to |
| /// the parameter being set. |
| |
| /// |value| is bool. |data| is unused. |
| const uint32 ETHERNET_SETPARAM_PROMISC = 1; |
| |
| /// |value| is bool. |data| is unused. |
| const uint32 ETHERNET_SETPARAM_MULTICAST_PROMISC = 2; |
| |
| const int32 ETHERNET_MULTICAST_FILTER_OVERFLOW = -1; |
| |
| /// |value| is number of addresses, or ETHERNET_MULTICAST_FILTER_OVERFLOW for "too many to count." |
| /// |data| is |value|*6 bytes of MAC addresses. Caller retains ownership. |
| /// If |value| is _OVERFLOW, |data| is ignored. |
| const uint32 ETHERNET_SETPARAM_MULTICAST_FILTER = 3; |
| |
| const uint32 ETHERNET_SETPARAM_DUMP_REGS = 4; |
| |
| /// The ethernet midlayer will never call ethermac_protocol |
| /// methods from multiple threads simultaneously, but it |
| /// can call send() methods at the same time as non-send |
| /// methods. |
| [Layout = "ddk-protocol"] |
| protocol EthernetImpl { |
| /// Obtain information about the ethermac device and supported features |
| /// Safe to call at any time. |
| Query(uint32 options) -> (zx.status s, EthernetInfo info); |
| |
| /// Shut down a running ethermac |
| /// Safe to call if the ethermac is already stopped. |
| Stop() -> (); |
| |
| /// Start ethermac running with ifc_virt |
| /// Callbacks on ifc may be invoked from now until stop() is called |
| Start(EthernetIfc ifc) -> (zx.status s); |
| |
| /// Request transmission of the packet in netbuf. The driver takes ownership of the netbuf and |
| /// must call the completion callback passed in to return it once the enqueue is complete. |
| /// The callback may be used to return the packet before transmission itself completes, and may |
| /// called from within the queue_tx() implementation itself. |
| /// |
| /// |QueueTx| may be called at any time after start() is called including from multiple threads |
| /// simultaneously. |
| /// |
| /// Return status indicates queue state: |
| /// ZX_OK: Packet has been enqueued. |
| /// Other: Packet could not be enqueued. |
| /// Upon a return of ZX_OK, the packet has been enqueued, but no information is returned as to |
| /// the completion state of the transmission itself. |
| [Async] |
| QueueTx(uint32 options, EthernetNetbuf? netbuf) -> (zx.status status, EthernetNetbuf? netbuf); |
| |
| /// Request a settings change for the driver. Return status indicates disposition: |
| /// ZX_OK: Request has been handled. |
| /// ZX_ERR_NOT_SUPPORTED: Driver does not support this setting. |
| /// Other: Error trying to support this request. |
| /// |
| /// |value| and |data| usage are defined for each |param|; see comments above. |
| /// |
| /// set_param() may be called at any time after start() is called including from multiple threads |
| /// simultaneously. |
| SetParam(uint32 param, int32 value, vector<voidptr> data) -> (zx.status s); |
| |
| /// Get the BTI handle (needed to pin DMA memory) for this device. |
| /// This method is only valid on devices that advertise ETHERNET_FEATURE_DMA |
| /// The caller takes ownership of the BTI handle. |
| GetBti() -> (handle<bti> bti); |
| }; |