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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b54c9d5bd6
Use accessor functions for skb fragment's page_offset instead of direct references, in preparation for bvec conversion. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1364 lines
34 KiB
C
1364 lines
34 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Networking over Thunderbolt cable using Apple ThunderboltIP protocol
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*
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* Copyright (C) 2017, Intel Corporation
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* Authors: Amir Levy <amir.jer.levy@intel.com>
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* Michael Jamet <michael.jamet@intel.com>
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* Mika Westerberg <mika.westerberg@linux.intel.com>
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*/
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#include <linux/atomic.h>
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#include <linux/highmem.h>
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#include <linux/if_vlan.h>
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#include <linux/jhash.h>
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#include <linux/module.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/sizes.h>
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#include <linux/thunderbolt.h>
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#include <linux/uuid.h>
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#include <linux/workqueue.h>
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#include <net/ip6_checksum.h>
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/* Protocol timeouts in ms */
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#define TBNET_LOGIN_DELAY 4500
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#define TBNET_LOGIN_TIMEOUT 500
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#define TBNET_LOGOUT_TIMEOUT 100
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#define TBNET_RING_SIZE 256
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#define TBNET_LOCAL_PATH 0xf
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#define TBNET_LOGIN_RETRIES 60
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#define TBNET_LOGOUT_RETRIES 5
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#define TBNET_MATCH_FRAGS_ID BIT(1)
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#define TBNET_MAX_MTU SZ_64K
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#define TBNET_FRAME_SIZE SZ_4K
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#define TBNET_MAX_PAYLOAD_SIZE \
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(TBNET_FRAME_SIZE - sizeof(struct thunderbolt_ip_frame_header))
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/* Rx packets need to hold space for skb_shared_info */
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#define TBNET_RX_MAX_SIZE \
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(TBNET_FRAME_SIZE + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
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#define TBNET_RX_PAGE_ORDER get_order(TBNET_RX_MAX_SIZE)
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#define TBNET_RX_PAGE_SIZE (PAGE_SIZE << TBNET_RX_PAGE_ORDER)
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#define TBNET_L0_PORT_NUM(route) ((route) & GENMASK(5, 0))
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/**
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* struct thunderbolt_ip_frame_header - Header for each Thunderbolt frame
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* @frame_size: size of the data with the frame
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* @frame_index: running index on the frames
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* @frame_id: ID of the frame to match frames to specific packet
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* @frame_count: how many frames assembles a full packet
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*
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* Each data frame passed to the high-speed DMA ring has this header. If
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* the XDomain network directory announces that %TBNET_MATCH_FRAGS_ID is
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* supported then @frame_id is filled, otherwise it stays %0.
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*/
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struct thunderbolt_ip_frame_header {
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u32 frame_size;
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u16 frame_index;
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u16 frame_id;
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u32 frame_count;
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};
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enum thunderbolt_ip_frame_pdf {
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TBIP_PDF_FRAME_START = 1,
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TBIP_PDF_FRAME_END,
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};
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enum thunderbolt_ip_type {
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TBIP_LOGIN,
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TBIP_LOGIN_RESPONSE,
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TBIP_LOGOUT,
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TBIP_STATUS,
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};
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struct thunderbolt_ip_header {
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u32 route_hi;
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u32 route_lo;
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u32 length_sn;
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uuid_t uuid;
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uuid_t initiator_uuid;
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uuid_t target_uuid;
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u32 type;
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u32 command_id;
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};
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#define TBIP_HDR_LENGTH_MASK GENMASK(5, 0)
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#define TBIP_HDR_SN_MASK GENMASK(28, 27)
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#define TBIP_HDR_SN_SHIFT 27
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struct thunderbolt_ip_login {
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struct thunderbolt_ip_header hdr;
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u32 proto_version;
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u32 transmit_path;
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u32 reserved[4];
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};
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#define TBIP_LOGIN_PROTO_VERSION 1
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struct thunderbolt_ip_login_response {
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struct thunderbolt_ip_header hdr;
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u32 status;
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u32 receiver_mac[2];
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u32 receiver_mac_len;
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u32 reserved[4];
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};
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struct thunderbolt_ip_logout {
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struct thunderbolt_ip_header hdr;
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};
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struct thunderbolt_ip_status {
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struct thunderbolt_ip_header hdr;
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u32 status;
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};
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struct tbnet_stats {
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u64 tx_packets;
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u64 rx_packets;
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u64 tx_bytes;
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u64 rx_bytes;
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u64 rx_errors;
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u64 tx_errors;
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u64 rx_length_errors;
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u64 rx_over_errors;
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u64 rx_crc_errors;
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u64 rx_missed_errors;
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};
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struct tbnet_frame {
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struct net_device *dev;
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struct page *page;
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struct ring_frame frame;
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};
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struct tbnet_ring {
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struct tbnet_frame frames[TBNET_RING_SIZE];
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unsigned int cons;
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unsigned int prod;
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struct tb_ring *ring;
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};
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/**
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* struct tbnet - ThunderboltIP network driver private data
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* @svc: XDomain service the driver is bound to
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* @xd: XDomain the service blongs to
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* @handler: ThunderboltIP configuration protocol handler
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* @dev: Networking device
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* @napi: NAPI structure for Rx polling
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* @stats: Network statistics
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* @skb: Network packet that is currently processed on Rx path
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* @command_id: ID used for next configuration protocol packet
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* @login_sent: ThunderboltIP login message successfully sent
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* @login_received: ThunderboltIP login message received from the remote
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* host
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* @transmit_path: HopID the other end needs to use building the
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* opposite side path.
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* @connection_lock: Lock serializing access to @login_sent,
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* @login_received and @transmit_path.
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* @login_retries: Number of login retries currently done
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* @login_work: Worker to send ThunderboltIP login packets
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* @connected_work: Worker that finalizes the ThunderboltIP connection
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* setup and enables DMA paths for high speed data
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* transfers
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* @disconnect_work: Worker that handles tearing down the ThunderboltIP
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* connection
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* @rx_hdr: Copy of the currently processed Rx frame. Used when a
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* network packet consists of multiple Thunderbolt frames.
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* In host byte order.
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* @rx_ring: Software ring holding Rx frames
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* @frame_id: Frame ID use for next Tx packet
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* (if %TBNET_MATCH_FRAGS_ID is supported in both ends)
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* @tx_ring: Software ring holding Tx frames
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*/
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struct tbnet {
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const struct tb_service *svc;
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struct tb_xdomain *xd;
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struct tb_protocol_handler handler;
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struct net_device *dev;
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struct napi_struct napi;
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struct tbnet_stats stats;
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struct sk_buff *skb;
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atomic_t command_id;
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bool login_sent;
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bool login_received;
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u32 transmit_path;
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struct mutex connection_lock;
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int login_retries;
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struct delayed_work login_work;
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struct work_struct connected_work;
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struct work_struct disconnect_work;
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struct thunderbolt_ip_frame_header rx_hdr;
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struct tbnet_ring rx_ring;
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atomic_t frame_id;
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struct tbnet_ring tx_ring;
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};
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/* Network property directory UUID: c66189ca-1cce-4195-bdb8-49592e5f5a4f */
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static const uuid_t tbnet_dir_uuid =
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UUID_INIT(0xc66189ca, 0x1cce, 0x4195,
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0xbd, 0xb8, 0x49, 0x59, 0x2e, 0x5f, 0x5a, 0x4f);
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/* ThunderboltIP protocol UUID: 798f589e-3616-8a47-97c6-5664a920c8dd */
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static const uuid_t tbnet_svc_uuid =
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UUID_INIT(0x798f589e, 0x3616, 0x8a47,
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0x97, 0xc6, 0x56, 0x64, 0xa9, 0x20, 0xc8, 0xdd);
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static struct tb_property_dir *tbnet_dir;
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static void tbnet_fill_header(struct thunderbolt_ip_header *hdr, u64 route,
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u8 sequence, const uuid_t *initiator_uuid, const uuid_t *target_uuid,
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enum thunderbolt_ip_type type, size_t size, u32 command_id)
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{
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u32 length_sn;
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/* Length does not include route_hi/lo and length_sn fields */
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length_sn = (size - 3 * 4) / 4;
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length_sn |= (sequence << TBIP_HDR_SN_SHIFT) & TBIP_HDR_SN_MASK;
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hdr->route_hi = upper_32_bits(route);
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hdr->route_lo = lower_32_bits(route);
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hdr->length_sn = length_sn;
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uuid_copy(&hdr->uuid, &tbnet_svc_uuid);
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uuid_copy(&hdr->initiator_uuid, initiator_uuid);
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uuid_copy(&hdr->target_uuid, target_uuid);
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hdr->type = type;
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hdr->command_id = command_id;
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}
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static int tbnet_login_response(struct tbnet *net, u64 route, u8 sequence,
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u32 command_id)
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{
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struct thunderbolt_ip_login_response reply;
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struct tb_xdomain *xd = net->xd;
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memset(&reply, 0, sizeof(reply));
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tbnet_fill_header(&reply.hdr, route, sequence, xd->local_uuid,
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xd->remote_uuid, TBIP_LOGIN_RESPONSE, sizeof(reply),
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command_id);
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memcpy(reply.receiver_mac, net->dev->dev_addr, ETH_ALEN);
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reply.receiver_mac_len = ETH_ALEN;
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return tb_xdomain_response(xd, &reply, sizeof(reply),
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TB_CFG_PKG_XDOMAIN_RESP);
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}
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static int tbnet_login_request(struct tbnet *net, u8 sequence)
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{
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struct thunderbolt_ip_login_response reply;
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struct thunderbolt_ip_login request;
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struct tb_xdomain *xd = net->xd;
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memset(&request, 0, sizeof(request));
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tbnet_fill_header(&request.hdr, xd->route, sequence, xd->local_uuid,
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xd->remote_uuid, TBIP_LOGIN, sizeof(request),
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atomic_inc_return(&net->command_id));
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request.proto_version = TBIP_LOGIN_PROTO_VERSION;
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request.transmit_path = TBNET_LOCAL_PATH;
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return tb_xdomain_request(xd, &request, sizeof(request),
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TB_CFG_PKG_XDOMAIN_RESP, &reply,
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sizeof(reply), TB_CFG_PKG_XDOMAIN_RESP,
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TBNET_LOGIN_TIMEOUT);
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}
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static int tbnet_logout_response(struct tbnet *net, u64 route, u8 sequence,
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u32 command_id)
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{
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struct thunderbolt_ip_status reply;
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struct tb_xdomain *xd = net->xd;
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memset(&reply, 0, sizeof(reply));
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tbnet_fill_header(&reply.hdr, route, sequence, xd->local_uuid,
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xd->remote_uuid, TBIP_STATUS, sizeof(reply),
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atomic_inc_return(&net->command_id));
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return tb_xdomain_response(xd, &reply, sizeof(reply),
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TB_CFG_PKG_XDOMAIN_RESP);
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}
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static int tbnet_logout_request(struct tbnet *net)
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{
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struct thunderbolt_ip_logout request;
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struct thunderbolt_ip_status reply;
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struct tb_xdomain *xd = net->xd;
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memset(&request, 0, sizeof(request));
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tbnet_fill_header(&request.hdr, xd->route, 0, xd->local_uuid,
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xd->remote_uuid, TBIP_LOGOUT, sizeof(request),
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atomic_inc_return(&net->command_id));
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return tb_xdomain_request(xd, &request, sizeof(request),
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TB_CFG_PKG_XDOMAIN_RESP, &reply,
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sizeof(reply), TB_CFG_PKG_XDOMAIN_RESP,
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TBNET_LOGOUT_TIMEOUT);
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}
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static void start_login(struct tbnet *net)
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{
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mutex_lock(&net->connection_lock);
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net->login_sent = false;
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net->login_received = false;
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mutex_unlock(&net->connection_lock);
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queue_delayed_work(system_long_wq, &net->login_work,
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msecs_to_jiffies(1000));
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}
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static void stop_login(struct tbnet *net)
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{
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cancel_delayed_work_sync(&net->login_work);
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cancel_work_sync(&net->connected_work);
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}
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static inline unsigned int tbnet_frame_size(const struct tbnet_frame *tf)
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{
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return tf->frame.size ? : TBNET_FRAME_SIZE;
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}
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static void tbnet_free_buffers(struct tbnet_ring *ring)
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{
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unsigned int i;
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for (i = 0; i < TBNET_RING_SIZE; i++) {
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struct device *dma_dev = tb_ring_dma_device(ring->ring);
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struct tbnet_frame *tf = &ring->frames[i];
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enum dma_data_direction dir;
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unsigned int order;
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size_t size;
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if (!tf->page)
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continue;
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if (ring->ring->is_tx) {
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dir = DMA_TO_DEVICE;
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order = 0;
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size = TBNET_FRAME_SIZE;
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} else {
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dir = DMA_FROM_DEVICE;
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order = TBNET_RX_PAGE_ORDER;
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size = TBNET_RX_PAGE_SIZE;
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}
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if (tf->frame.buffer_phy)
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dma_unmap_page(dma_dev, tf->frame.buffer_phy, size,
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dir);
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__free_pages(tf->page, order);
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tf->page = NULL;
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}
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ring->cons = 0;
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ring->prod = 0;
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}
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static void tbnet_tear_down(struct tbnet *net, bool send_logout)
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{
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netif_carrier_off(net->dev);
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netif_stop_queue(net->dev);
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stop_login(net);
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mutex_lock(&net->connection_lock);
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if (net->login_sent && net->login_received) {
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int retries = TBNET_LOGOUT_RETRIES;
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while (send_logout && retries-- > 0) {
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int ret = tbnet_logout_request(net);
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if (ret != -ETIMEDOUT)
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break;
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}
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tb_ring_stop(net->rx_ring.ring);
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tb_ring_stop(net->tx_ring.ring);
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tbnet_free_buffers(&net->rx_ring);
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tbnet_free_buffers(&net->tx_ring);
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if (tb_xdomain_disable_paths(net->xd))
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netdev_warn(net->dev, "failed to disable DMA paths\n");
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}
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net->login_retries = 0;
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net->login_sent = false;
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net->login_received = false;
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mutex_unlock(&net->connection_lock);
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}
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static int tbnet_handle_packet(const void *buf, size_t size, void *data)
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{
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const struct thunderbolt_ip_login *pkg = buf;
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struct tbnet *net = data;
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u32 command_id;
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int ret = 0;
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u32 sequence;
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u64 route;
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/* Make sure the packet is for us */
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if (size < sizeof(struct thunderbolt_ip_header))
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return 0;
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if (!uuid_equal(&pkg->hdr.initiator_uuid, net->xd->remote_uuid))
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return 0;
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if (!uuid_equal(&pkg->hdr.target_uuid, net->xd->local_uuid))
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return 0;
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route = ((u64)pkg->hdr.route_hi << 32) | pkg->hdr.route_lo;
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route &= ~BIT_ULL(63);
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if (route != net->xd->route)
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return 0;
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sequence = pkg->hdr.length_sn & TBIP_HDR_SN_MASK;
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sequence >>= TBIP_HDR_SN_SHIFT;
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command_id = pkg->hdr.command_id;
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switch (pkg->hdr.type) {
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case TBIP_LOGIN:
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if (!netif_running(net->dev))
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break;
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ret = tbnet_login_response(net, route, sequence,
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pkg->hdr.command_id);
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if (!ret) {
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mutex_lock(&net->connection_lock);
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net->login_received = true;
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net->transmit_path = pkg->transmit_path;
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/* If we reached the number of max retries or
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* previous logout, schedule another round of
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* login retries
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*/
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if (net->login_retries >= TBNET_LOGIN_RETRIES ||
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!net->login_sent) {
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net->login_retries = 0;
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queue_delayed_work(system_long_wq,
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&net->login_work, 0);
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}
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mutex_unlock(&net->connection_lock);
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queue_work(system_long_wq, &net->connected_work);
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}
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break;
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case TBIP_LOGOUT:
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ret = tbnet_logout_response(net, route, sequence, command_id);
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if (!ret)
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queue_work(system_long_wq, &net->disconnect_work);
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break;
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default:
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return 0;
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}
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if (ret)
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netdev_warn(net->dev, "failed to send ThunderboltIP response\n");
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return 1;
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}
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static unsigned int tbnet_available_buffers(const struct tbnet_ring *ring)
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{
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return ring->prod - ring->cons;
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}
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static int tbnet_alloc_rx_buffers(struct tbnet *net, unsigned int nbuffers)
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{
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struct tbnet_ring *ring = &net->rx_ring;
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int ret;
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while (nbuffers--) {
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struct device *dma_dev = tb_ring_dma_device(ring->ring);
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unsigned int index = ring->prod & (TBNET_RING_SIZE - 1);
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struct tbnet_frame *tf = &ring->frames[index];
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dma_addr_t dma_addr;
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if (tf->page)
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break;
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|
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/* Allocate page (order > 0) so that it can hold maximum
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* ThunderboltIP frame (4kB) and the additional room for
|
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* SKB shared info required by build_skb().
|
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*/
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tf->page = dev_alloc_pages(TBNET_RX_PAGE_ORDER);
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if (!tf->page) {
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ret = -ENOMEM;
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goto err_free;
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}
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dma_addr = dma_map_page(dma_dev, tf->page, 0,
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TBNET_RX_PAGE_SIZE, DMA_FROM_DEVICE);
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if (dma_mapping_error(dma_dev, dma_addr)) {
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ret = -ENOMEM;
|
|
goto err_free;
|
|
}
|
|
|
|
tf->frame.buffer_phy = dma_addr;
|
|
tf->dev = net->dev;
|
|
|
|
tb_ring_rx(ring->ring, &tf->frame);
|
|
|
|
ring->prod++;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_free:
|
|
tbnet_free_buffers(ring);
|
|
return ret;
|
|
}
|
|
|
|
static struct tbnet_frame *tbnet_get_tx_buffer(struct tbnet *net)
|
|
{
|
|
struct tbnet_ring *ring = &net->tx_ring;
|
|
struct device *dma_dev = tb_ring_dma_device(ring->ring);
|
|
struct tbnet_frame *tf;
|
|
unsigned int index;
|
|
|
|
if (!tbnet_available_buffers(ring))
|
|
return NULL;
|
|
|
|
index = ring->cons++ & (TBNET_RING_SIZE - 1);
|
|
|
|
tf = &ring->frames[index];
|
|
tf->frame.size = 0;
|
|
|
|
dma_sync_single_for_cpu(dma_dev, tf->frame.buffer_phy,
|
|
tbnet_frame_size(tf), DMA_TO_DEVICE);
|
|
|
|
return tf;
|
|
}
|
|
|
|
static void tbnet_tx_callback(struct tb_ring *ring, struct ring_frame *frame,
|
|
bool canceled)
|
|
{
|
|
struct tbnet_frame *tf = container_of(frame, typeof(*tf), frame);
|
|
struct tbnet *net = netdev_priv(tf->dev);
|
|
|
|
/* Return buffer to the ring */
|
|
net->tx_ring.prod++;
|
|
|
|
if (tbnet_available_buffers(&net->tx_ring) >= TBNET_RING_SIZE / 2)
|
|
netif_wake_queue(net->dev);
|
|
}
|
|
|
|
static int tbnet_alloc_tx_buffers(struct tbnet *net)
|
|
{
|
|
struct tbnet_ring *ring = &net->tx_ring;
|
|
struct device *dma_dev = tb_ring_dma_device(ring->ring);
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < TBNET_RING_SIZE; i++) {
|
|
struct tbnet_frame *tf = &ring->frames[i];
|
|
dma_addr_t dma_addr;
|
|
|
|
tf->page = alloc_page(GFP_KERNEL);
|
|
if (!tf->page) {
|
|
tbnet_free_buffers(ring);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dma_addr = dma_map_page(dma_dev, tf->page, 0, TBNET_FRAME_SIZE,
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dma_dev, dma_addr)) {
|
|
__free_page(tf->page);
|
|
tf->page = NULL;
|
|
tbnet_free_buffers(ring);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
tf->dev = net->dev;
|
|
tf->frame.buffer_phy = dma_addr;
|
|
tf->frame.callback = tbnet_tx_callback;
|
|
tf->frame.sof = TBIP_PDF_FRAME_START;
|
|
tf->frame.eof = TBIP_PDF_FRAME_END;
|
|
}
|
|
|
|
ring->cons = 0;
|
|
ring->prod = TBNET_RING_SIZE - 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tbnet_connected_work(struct work_struct *work)
|
|
{
|
|
struct tbnet *net = container_of(work, typeof(*net), connected_work);
|
|
bool connected;
|
|
int ret;
|
|
|
|
if (netif_carrier_ok(net->dev))
|
|
return;
|
|
|
|
mutex_lock(&net->connection_lock);
|
|
connected = net->login_sent && net->login_received;
|
|
mutex_unlock(&net->connection_lock);
|
|
|
|
if (!connected)
|
|
return;
|
|
|
|
/* Both logins successful so enable the high-speed DMA paths and
|
|
* start the network device queue.
|
|
*/
|
|
ret = tb_xdomain_enable_paths(net->xd, TBNET_LOCAL_PATH,
|
|
net->rx_ring.ring->hop,
|
|
net->transmit_path,
|
|
net->tx_ring.ring->hop);
|
|
if (ret) {
|
|
netdev_err(net->dev, "failed to enable DMA paths\n");
|
|
return;
|
|
}
|
|
|
|
tb_ring_start(net->tx_ring.ring);
|
|
tb_ring_start(net->rx_ring.ring);
|
|
|
|
ret = tbnet_alloc_rx_buffers(net, TBNET_RING_SIZE);
|
|
if (ret)
|
|
goto err_stop_rings;
|
|
|
|
ret = tbnet_alloc_tx_buffers(net);
|
|
if (ret)
|
|
goto err_free_rx_buffers;
|
|
|
|
netif_carrier_on(net->dev);
|
|
netif_start_queue(net->dev);
|
|
return;
|
|
|
|
err_free_rx_buffers:
|
|
tbnet_free_buffers(&net->rx_ring);
|
|
err_stop_rings:
|
|
tb_ring_stop(net->rx_ring.ring);
|
|
tb_ring_stop(net->tx_ring.ring);
|
|
}
|
|
|
|
static void tbnet_login_work(struct work_struct *work)
|
|
{
|
|
struct tbnet *net = container_of(work, typeof(*net), login_work.work);
|
|
unsigned long delay = msecs_to_jiffies(TBNET_LOGIN_DELAY);
|
|
int ret;
|
|
|
|
if (netif_carrier_ok(net->dev))
|
|
return;
|
|
|
|
ret = tbnet_login_request(net, net->login_retries % 4);
|
|
if (ret) {
|
|
if (net->login_retries++ < TBNET_LOGIN_RETRIES) {
|
|
queue_delayed_work(system_long_wq, &net->login_work,
|
|
delay);
|
|
} else {
|
|
netdev_info(net->dev, "ThunderboltIP login timed out\n");
|
|
}
|
|
} else {
|
|
net->login_retries = 0;
|
|
|
|
mutex_lock(&net->connection_lock);
|
|
net->login_sent = true;
|
|
mutex_unlock(&net->connection_lock);
|
|
|
|
queue_work(system_long_wq, &net->connected_work);
|
|
}
|
|
}
|
|
|
|
static void tbnet_disconnect_work(struct work_struct *work)
|
|
{
|
|
struct tbnet *net = container_of(work, typeof(*net), disconnect_work);
|
|
|
|
tbnet_tear_down(net, false);
|
|
}
|
|
|
|
static bool tbnet_check_frame(struct tbnet *net, const struct tbnet_frame *tf,
|
|
const struct thunderbolt_ip_frame_header *hdr)
|
|
{
|
|
u32 frame_id, frame_count, frame_size, frame_index;
|
|
unsigned int size;
|
|
|
|
if (tf->frame.flags & RING_DESC_CRC_ERROR) {
|
|
net->stats.rx_crc_errors++;
|
|
return false;
|
|
} else if (tf->frame.flags & RING_DESC_BUFFER_OVERRUN) {
|
|
net->stats.rx_over_errors++;
|
|
return false;
|
|
}
|
|
|
|
/* Should be greater than just header i.e. contains data */
|
|
size = tbnet_frame_size(tf);
|
|
if (size <= sizeof(*hdr)) {
|
|
net->stats.rx_length_errors++;
|
|
return false;
|
|
}
|
|
|
|
frame_count = le32_to_cpu(hdr->frame_count);
|
|
frame_size = le32_to_cpu(hdr->frame_size);
|
|
frame_index = le16_to_cpu(hdr->frame_index);
|
|
frame_id = le16_to_cpu(hdr->frame_id);
|
|
|
|
if ((frame_size > size - sizeof(*hdr)) || !frame_size) {
|
|
net->stats.rx_length_errors++;
|
|
return false;
|
|
}
|
|
|
|
/* In case we're in the middle of packet, validate the frame
|
|
* header based on first fragment of the packet.
|
|
*/
|
|
if (net->skb && net->rx_hdr.frame_count) {
|
|
/* Check the frame count fits the count field */
|
|
if (frame_count != net->rx_hdr.frame_count) {
|
|
net->stats.rx_length_errors++;
|
|
return false;
|
|
}
|
|
|
|
/* Check the frame identifiers are incremented correctly,
|
|
* and id is matching.
|
|
*/
|
|
if (frame_index != net->rx_hdr.frame_index + 1 ||
|
|
frame_id != net->rx_hdr.frame_id) {
|
|
net->stats.rx_missed_errors++;
|
|
return false;
|
|
}
|
|
|
|
if (net->skb->len + frame_size > TBNET_MAX_MTU) {
|
|
net->stats.rx_length_errors++;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Start of packet, validate the frame header */
|
|
if (frame_count == 0 || frame_count > TBNET_RING_SIZE / 4) {
|
|
net->stats.rx_length_errors++;
|
|
return false;
|
|
}
|
|
if (frame_index != 0) {
|
|
net->stats.rx_missed_errors++;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int tbnet_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct tbnet *net = container_of(napi, struct tbnet, napi);
|
|
unsigned int cleaned_count = tbnet_available_buffers(&net->rx_ring);
|
|
struct device *dma_dev = tb_ring_dma_device(net->rx_ring.ring);
|
|
unsigned int rx_packets = 0;
|
|
|
|
while (rx_packets < budget) {
|
|
const struct thunderbolt_ip_frame_header *hdr;
|
|
unsigned int hdr_size = sizeof(*hdr);
|
|
struct sk_buff *skb = NULL;
|
|
struct ring_frame *frame;
|
|
struct tbnet_frame *tf;
|
|
struct page *page;
|
|
bool last = true;
|
|
u32 frame_size;
|
|
|
|
/* Return some buffers to hardware, one at a time is too
|
|
* slow so allocate MAX_SKB_FRAGS buffers at the same
|
|
* time.
|
|
*/
|
|
if (cleaned_count >= MAX_SKB_FRAGS) {
|
|
tbnet_alloc_rx_buffers(net, cleaned_count);
|
|
cleaned_count = 0;
|
|
}
|
|
|
|
frame = tb_ring_poll(net->rx_ring.ring);
|
|
if (!frame)
|
|
break;
|
|
|
|
dma_unmap_page(dma_dev, frame->buffer_phy,
|
|
TBNET_RX_PAGE_SIZE, DMA_FROM_DEVICE);
|
|
|
|
tf = container_of(frame, typeof(*tf), frame);
|
|
|
|
page = tf->page;
|
|
tf->page = NULL;
|
|
net->rx_ring.cons++;
|
|
cleaned_count++;
|
|
|
|
hdr = page_address(page);
|
|
if (!tbnet_check_frame(net, tf, hdr)) {
|
|
__free_pages(page, TBNET_RX_PAGE_ORDER);
|
|
dev_kfree_skb_any(net->skb);
|
|
net->skb = NULL;
|
|
continue;
|
|
}
|
|
|
|
frame_size = le32_to_cpu(hdr->frame_size);
|
|
|
|
skb = net->skb;
|
|
if (!skb) {
|
|
skb = build_skb(page_address(page),
|
|
TBNET_RX_PAGE_SIZE);
|
|
if (!skb) {
|
|
__free_pages(page, TBNET_RX_PAGE_ORDER);
|
|
net->stats.rx_errors++;
|
|
break;
|
|
}
|
|
|
|
skb_reserve(skb, hdr_size);
|
|
skb_put(skb, frame_size);
|
|
|
|
net->skb = skb;
|
|
} else {
|
|
skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
|
|
page, hdr_size, frame_size,
|
|
TBNET_RX_PAGE_SIZE - hdr_size);
|
|
}
|
|
|
|
net->rx_hdr.frame_size = frame_size;
|
|
net->rx_hdr.frame_count = le32_to_cpu(hdr->frame_count);
|
|
net->rx_hdr.frame_index = le16_to_cpu(hdr->frame_index);
|
|
net->rx_hdr.frame_id = le16_to_cpu(hdr->frame_id);
|
|
last = net->rx_hdr.frame_index == net->rx_hdr.frame_count - 1;
|
|
|
|
rx_packets++;
|
|
net->stats.rx_bytes += frame_size;
|
|
|
|
if (last) {
|
|
skb->protocol = eth_type_trans(skb, net->dev);
|
|
napi_gro_receive(&net->napi, skb);
|
|
net->skb = NULL;
|
|
}
|
|
}
|
|
|
|
net->stats.rx_packets += rx_packets;
|
|
|
|
if (cleaned_count)
|
|
tbnet_alloc_rx_buffers(net, cleaned_count);
|
|
|
|
if (rx_packets >= budget)
|
|
return budget;
|
|
|
|
napi_complete_done(napi, rx_packets);
|
|
/* Re-enable the ring interrupt */
|
|
tb_ring_poll_complete(net->rx_ring.ring);
|
|
|
|
return rx_packets;
|
|
}
|
|
|
|
static void tbnet_start_poll(void *data)
|
|
{
|
|
struct tbnet *net = data;
|
|
|
|
napi_schedule(&net->napi);
|
|
}
|
|
|
|
static int tbnet_open(struct net_device *dev)
|
|
{
|
|
struct tbnet *net = netdev_priv(dev);
|
|
struct tb_xdomain *xd = net->xd;
|
|
u16 sof_mask, eof_mask;
|
|
struct tb_ring *ring;
|
|
|
|
netif_carrier_off(dev);
|
|
|
|
ring = tb_ring_alloc_tx(xd->tb->nhi, -1, TBNET_RING_SIZE,
|
|
RING_FLAG_FRAME);
|
|
if (!ring) {
|
|
netdev_err(dev, "failed to allocate Tx ring\n");
|
|
return -ENOMEM;
|
|
}
|
|
net->tx_ring.ring = ring;
|
|
|
|
sof_mask = BIT(TBIP_PDF_FRAME_START);
|
|
eof_mask = BIT(TBIP_PDF_FRAME_END);
|
|
|
|
ring = tb_ring_alloc_rx(xd->tb->nhi, -1, TBNET_RING_SIZE,
|
|
RING_FLAG_FRAME | RING_FLAG_E2E, sof_mask,
|
|
eof_mask, tbnet_start_poll, net);
|
|
if (!ring) {
|
|
netdev_err(dev, "failed to allocate Rx ring\n");
|
|
tb_ring_free(net->tx_ring.ring);
|
|
net->tx_ring.ring = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
net->rx_ring.ring = ring;
|
|
|
|
napi_enable(&net->napi);
|
|
start_login(net);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tbnet_stop(struct net_device *dev)
|
|
{
|
|
struct tbnet *net = netdev_priv(dev);
|
|
|
|
napi_disable(&net->napi);
|
|
|
|
cancel_work_sync(&net->disconnect_work);
|
|
tbnet_tear_down(net, true);
|
|
|
|
tb_ring_free(net->rx_ring.ring);
|
|
net->rx_ring.ring = NULL;
|
|
tb_ring_free(net->tx_ring.ring);
|
|
net->tx_ring.ring = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool tbnet_xmit_csum_and_map(struct tbnet *net, struct sk_buff *skb,
|
|
struct tbnet_frame **frames, u32 frame_count)
|
|
{
|
|
struct thunderbolt_ip_frame_header *hdr = page_address(frames[0]->page);
|
|
struct device *dma_dev = tb_ring_dma_device(net->tx_ring.ring);
|
|
__wsum wsum = htonl(skb->len - skb_transport_offset(skb));
|
|
unsigned int i, len, offset = skb_transport_offset(skb);
|
|
__be16 protocol = skb->protocol;
|
|
void *data = skb->data;
|
|
void *dest = hdr + 1;
|
|
__sum16 *tucso;
|
|
|
|
if (skb->ip_summed != CHECKSUM_PARTIAL) {
|
|
/* No need to calculate checksum so we just update the
|
|
* total frame count and sync the frames for DMA.
|
|
*/
|
|
for (i = 0; i < frame_count; i++) {
|
|
hdr = page_address(frames[i]->page);
|
|
hdr->frame_count = cpu_to_le32(frame_count);
|
|
dma_sync_single_for_device(dma_dev,
|
|
frames[i]->frame.buffer_phy,
|
|
tbnet_frame_size(frames[i]), DMA_TO_DEVICE);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
if (protocol == htons(ETH_P_8021Q)) {
|
|
struct vlan_hdr *vhdr, vh;
|
|
|
|
vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(vh), &vh);
|
|
if (!vhdr)
|
|
return false;
|
|
|
|
protocol = vhdr->h_vlan_encapsulated_proto;
|
|
}
|
|
|
|
/* Data points on the beginning of packet.
|
|
* Check is the checksum absolute place in the packet.
|
|
* ipcso will update IP checksum.
|
|
* tucso will update TCP/UPD checksum.
|
|
*/
|
|
if (protocol == htons(ETH_P_IP)) {
|
|
__sum16 *ipcso = dest + ((void *)&(ip_hdr(skb)->check) - data);
|
|
|
|
*ipcso = 0;
|
|
*ipcso = ip_fast_csum(dest + skb_network_offset(skb),
|
|
ip_hdr(skb)->ihl);
|
|
|
|
if (ip_hdr(skb)->protocol == IPPROTO_TCP)
|
|
tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data);
|
|
else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
|
|
tucso = dest + ((void *)&(udp_hdr(skb)->check) - data);
|
|
else
|
|
return false;
|
|
|
|
*tucso = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
|
|
ip_hdr(skb)->daddr, 0,
|
|
ip_hdr(skb)->protocol, 0);
|
|
} else if (skb_is_gso_v6(skb)) {
|
|
tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data);
|
|
*tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
|
|
&ipv6_hdr(skb)->daddr, 0,
|
|
IPPROTO_TCP, 0);
|
|
return false;
|
|
} else if (protocol == htons(ETH_P_IPV6)) {
|
|
tucso = dest + skb_checksum_start_offset(skb) + skb->csum_offset;
|
|
*tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
|
|
&ipv6_hdr(skb)->daddr, 0,
|
|
ipv6_hdr(skb)->nexthdr, 0);
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
/* First frame was headers, rest of the frames contain data.
|
|
* Calculate checksum over each frame.
|
|
*/
|
|
for (i = 0; i < frame_count; i++) {
|
|
hdr = page_address(frames[i]->page);
|
|
dest = (void *)(hdr + 1) + offset;
|
|
len = le32_to_cpu(hdr->frame_size) - offset;
|
|
wsum = csum_partial(dest, len, wsum);
|
|
hdr->frame_count = cpu_to_le32(frame_count);
|
|
|
|
offset = 0;
|
|
}
|
|
|
|
*tucso = csum_fold(wsum);
|
|
|
|
/* Checksum is finally calculated and we don't touch the memory
|
|
* anymore, so DMA sync the frames now.
|
|
*/
|
|
for (i = 0; i < frame_count; i++) {
|
|
dma_sync_single_for_device(dma_dev, frames[i]->frame.buffer_phy,
|
|
tbnet_frame_size(frames[i]), DMA_TO_DEVICE);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void *tbnet_kmap_frag(struct sk_buff *skb, unsigned int frag_num,
|
|
unsigned int *len)
|
|
{
|
|
const skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_num];
|
|
|
|
*len = skb_frag_size(frag);
|
|
return kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag);
|
|
}
|
|
|
|
static netdev_tx_t tbnet_start_xmit(struct sk_buff *skb,
|
|
struct net_device *dev)
|
|
{
|
|
struct tbnet *net = netdev_priv(dev);
|
|
struct tbnet_frame *frames[MAX_SKB_FRAGS];
|
|
u16 frame_id = atomic_read(&net->frame_id);
|
|
struct thunderbolt_ip_frame_header *hdr;
|
|
unsigned int len = skb_headlen(skb);
|
|
unsigned int data_len = skb->len;
|
|
unsigned int nframes, i;
|
|
unsigned int frag = 0;
|
|
void *src = skb->data;
|
|
u32 frame_index = 0;
|
|
bool unmap = false;
|
|
void *dest;
|
|
|
|
nframes = DIV_ROUND_UP(data_len, TBNET_MAX_PAYLOAD_SIZE);
|
|
if (tbnet_available_buffers(&net->tx_ring) < nframes) {
|
|
netif_stop_queue(net->dev);
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
frames[frame_index] = tbnet_get_tx_buffer(net);
|
|
if (!frames[frame_index])
|
|
goto err_drop;
|
|
|
|
hdr = page_address(frames[frame_index]->page);
|
|
dest = hdr + 1;
|
|
|
|
/* If overall packet is bigger than the frame data size */
|
|
while (data_len > TBNET_MAX_PAYLOAD_SIZE) {
|
|
unsigned int size_left = TBNET_MAX_PAYLOAD_SIZE;
|
|
|
|
hdr->frame_size = cpu_to_le32(TBNET_MAX_PAYLOAD_SIZE);
|
|
hdr->frame_index = cpu_to_le16(frame_index);
|
|
hdr->frame_id = cpu_to_le16(frame_id);
|
|
|
|
do {
|
|
if (len > size_left) {
|
|
/* Copy data onto Tx buffer data with
|
|
* full frame size then break and go to
|
|
* next frame
|
|
*/
|
|
memcpy(dest, src, size_left);
|
|
len -= size_left;
|
|
dest += size_left;
|
|
src += size_left;
|
|
break;
|
|
}
|
|
|
|
memcpy(dest, src, len);
|
|
size_left -= len;
|
|
dest += len;
|
|
|
|
if (unmap) {
|
|
kunmap_atomic(src);
|
|
unmap = false;
|
|
}
|
|
|
|
/* Ensure all fragments have been processed */
|
|
if (frag < skb_shinfo(skb)->nr_frags) {
|
|
/* Map and then unmap quickly */
|
|
src = tbnet_kmap_frag(skb, frag++, &len);
|
|
unmap = true;
|
|
} else if (unlikely(size_left > 0)) {
|
|
goto err_drop;
|
|
}
|
|
} while (size_left > 0);
|
|
|
|
data_len -= TBNET_MAX_PAYLOAD_SIZE;
|
|
frame_index++;
|
|
|
|
frames[frame_index] = tbnet_get_tx_buffer(net);
|
|
if (!frames[frame_index])
|
|
goto err_drop;
|
|
|
|
hdr = page_address(frames[frame_index]->page);
|
|
dest = hdr + 1;
|
|
}
|
|
|
|
hdr->frame_size = cpu_to_le32(data_len);
|
|
hdr->frame_index = cpu_to_le16(frame_index);
|
|
hdr->frame_id = cpu_to_le16(frame_id);
|
|
|
|
frames[frame_index]->frame.size = data_len + sizeof(*hdr);
|
|
|
|
/* In case the remaining data_len is smaller than a frame */
|
|
while (len < data_len) {
|
|
memcpy(dest, src, len);
|
|
data_len -= len;
|
|
dest += len;
|
|
|
|
if (unmap) {
|
|
kunmap_atomic(src);
|
|
unmap = false;
|
|
}
|
|
|
|
if (frag < skb_shinfo(skb)->nr_frags) {
|
|
src = tbnet_kmap_frag(skb, frag++, &len);
|
|
unmap = true;
|
|
} else if (unlikely(data_len > 0)) {
|
|
goto err_drop;
|
|
}
|
|
}
|
|
|
|
memcpy(dest, src, data_len);
|
|
|
|
if (unmap)
|
|
kunmap_atomic(src);
|
|
|
|
if (!tbnet_xmit_csum_and_map(net, skb, frames, frame_index + 1))
|
|
goto err_drop;
|
|
|
|
for (i = 0; i < frame_index + 1; i++)
|
|
tb_ring_tx(net->tx_ring.ring, &frames[i]->frame);
|
|
|
|
if (net->svc->prtcstns & TBNET_MATCH_FRAGS_ID)
|
|
atomic_inc(&net->frame_id);
|
|
|
|
net->stats.tx_packets++;
|
|
net->stats.tx_bytes += skb->len;
|
|
|
|
dev_consume_skb_any(skb);
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
err_drop:
|
|
/* We can re-use the buffers */
|
|
net->tx_ring.cons -= frame_index;
|
|
|
|
dev_kfree_skb_any(skb);
|
|
net->stats.tx_errors++;
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static void tbnet_get_stats64(struct net_device *dev,
|
|
struct rtnl_link_stats64 *stats)
|
|
{
|
|
struct tbnet *net = netdev_priv(dev);
|
|
|
|
stats->tx_packets = net->stats.tx_packets;
|
|
stats->rx_packets = net->stats.rx_packets;
|
|
stats->tx_bytes = net->stats.tx_bytes;
|
|
stats->rx_bytes = net->stats.rx_bytes;
|
|
stats->rx_errors = net->stats.rx_errors + net->stats.rx_length_errors +
|
|
net->stats.rx_over_errors + net->stats.rx_crc_errors +
|
|
net->stats.rx_missed_errors;
|
|
stats->tx_errors = net->stats.tx_errors;
|
|
stats->rx_length_errors = net->stats.rx_length_errors;
|
|
stats->rx_over_errors = net->stats.rx_over_errors;
|
|
stats->rx_crc_errors = net->stats.rx_crc_errors;
|
|
stats->rx_missed_errors = net->stats.rx_missed_errors;
|
|
}
|
|
|
|
static const struct net_device_ops tbnet_netdev_ops = {
|
|
.ndo_open = tbnet_open,
|
|
.ndo_stop = tbnet_stop,
|
|
.ndo_start_xmit = tbnet_start_xmit,
|
|
.ndo_get_stats64 = tbnet_get_stats64,
|
|
};
|
|
|
|
static void tbnet_generate_mac(struct net_device *dev)
|
|
{
|
|
const struct tbnet *net = netdev_priv(dev);
|
|
const struct tb_xdomain *xd = net->xd;
|
|
u8 phy_port;
|
|
u32 hash;
|
|
|
|
phy_port = tb_phy_port_from_link(TBNET_L0_PORT_NUM(xd->route));
|
|
|
|
/* Unicast and locally administered MAC */
|
|
dev->dev_addr[0] = phy_port << 4 | 0x02;
|
|
hash = jhash2((u32 *)xd->local_uuid, 4, 0);
|
|
memcpy(dev->dev_addr + 1, &hash, sizeof(hash));
|
|
hash = jhash2((u32 *)xd->local_uuid, 4, hash);
|
|
dev->dev_addr[5] = hash & 0xff;
|
|
}
|
|
|
|
static int tbnet_probe(struct tb_service *svc, const struct tb_service_id *id)
|
|
{
|
|
struct tb_xdomain *xd = tb_service_parent(svc);
|
|
struct net_device *dev;
|
|
struct tbnet *net;
|
|
int ret;
|
|
|
|
dev = alloc_etherdev(sizeof(*net));
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
SET_NETDEV_DEV(dev, &svc->dev);
|
|
|
|
net = netdev_priv(dev);
|
|
INIT_DELAYED_WORK(&net->login_work, tbnet_login_work);
|
|
INIT_WORK(&net->connected_work, tbnet_connected_work);
|
|
INIT_WORK(&net->disconnect_work, tbnet_disconnect_work);
|
|
mutex_init(&net->connection_lock);
|
|
atomic_set(&net->command_id, 0);
|
|
atomic_set(&net->frame_id, 0);
|
|
net->svc = svc;
|
|
net->dev = dev;
|
|
net->xd = xd;
|
|
|
|
tbnet_generate_mac(dev);
|
|
|
|
strcpy(dev->name, "thunderbolt%d");
|
|
dev->netdev_ops = &tbnet_netdev_ops;
|
|
|
|
/* ThunderboltIP takes advantage of TSO packets but instead of
|
|
* segmenting them we just split the packet into Thunderbolt
|
|
* frames (maximum payload size of each frame is 4084 bytes) and
|
|
* calculate checksum over the whole packet here.
|
|
*
|
|
* The receiving side does the opposite if the host OS supports
|
|
* LRO, otherwise it needs to split the large packet into MTU
|
|
* sized smaller packets.
|
|
*
|
|
* In order to receive large packets from the networking stack,
|
|
* we need to announce support for most of the offloading
|
|
* features here.
|
|
*/
|
|
dev->hw_features = NETIF_F_SG | NETIF_F_ALL_TSO | NETIF_F_GRO |
|
|
NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
|
|
dev->features = dev->hw_features | NETIF_F_HIGHDMA;
|
|
dev->hard_header_len += sizeof(struct thunderbolt_ip_frame_header);
|
|
|
|
netif_napi_add(dev, &net->napi, tbnet_poll, NAPI_POLL_WEIGHT);
|
|
|
|
/* MTU range: 68 - 65522 */
|
|
dev->min_mtu = ETH_MIN_MTU;
|
|
dev->max_mtu = TBNET_MAX_MTU - ETH_HLEN;
|
|
|
|
net->handler.uuid = &tbnet_svc_uuid;
|
|
net->handler.callback = tbnet_handle_packet,
|
|
net->handler.data = net;
|
|
tb_register_protocol_handler(&net->handler);
|
|
|
|
tb_service_set_drvdata(svc, net);
|
|
|
|
ret = register_netdev(dev);
|
|
if (ret) {
|
|
tb_unregister_protocol_handler(&net->handler);
|
|
free_netdev(dev);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tbnet_remove(struct tb_service *svc)
|
|
{
|
|
struct tbnet *net = tb_service_get_drvdata(svc);
|
|
|
|
unregister_netdev(net->dev);
|
|
tb_unregister_protocol_handler(&net->handler);
|
|
free_netdev(net->dev);
|
|
}
|
|
|
|
static void tbnet_shutdown(struct tb_service *svc)
|
|
{
|
|
tbnet_tear_down(tb_service_get_drvdata(svc), true);
|
|
}
|
|
|
|
static int __maybe_unused tbnet_suspend(struct device *dev)
|
|
{
|
|
struct tb_service *svc = tb_to_service(dev);
|
|
struct tbnet *net = tb_service_get_drvdata(svc);
|
|
|
|
stop_login(net);
|
|
if (netif_running(net->dev)) {
|
|
netif_device_detach(net->dev);
|
|
tbnet_tear_down(net, true);
|
|
}
|
|
|
|
tb_unregister_protocol_handler(&net->handler);
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused tbnet_resume(struct device *dev)
|
|
{
|
|
struct tb_service *svc = tb_to_service(dev);
|
|
struct tbnet *net = tb_service_get_drvdata(svc);
|
|
|
|
tb_register_protocol_handler(&net->handler);
|
|
|
|
netif_carrier_off(net->dev);
|
|
if (netif_running(net->dev)) {
|
|
netif_device_attach(net->dev);
|
|
start_login(net);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops tbnet_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(tbnet_suspend, tbnet_resume)
|
|
};
|
|
|
|
static const struct tb_service_id tbnet_ids[] = {
|
|
{ TB_SERVICE("network", 1) },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(tbsvc, tbnet_ids);
|
|
|
|
static struct tb_service_driver tbnet_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "thunderbolt-net",
|
|
.pm = &tbnet_pm_ops,
|
|
},
|
|
.probe = tbnet_probe,
|
|
.remove = tbnet_remove,
|
|
.shutdown = tbnet_shutdown,
|
|
.id_table = tbnet_ids,
|
|
};
|
|
|
|
static int __init tbnet_init(void)
|
|
{
|
|
int ret;
|
|
|
|
tbnet_dir = tb_property_create_dir(&tbnet_dir_uuid);
|
|
if (!tbnet_dir)
|
|
return -ENOMEM;
|
|
|
|
tb_property_add_immediate(tbnet_dir, "prtcid", 1);
|
|
tb_property_add_immediate(tbnet_dir, "prtcvers", 1);
|
|
tb_property_add_immediate(tbnet_dir, "prtcrevs", 1);
|
|
tb_property_add_immediate(tbnet_dir, "prtcstns",
|
|
TBNET_MATCH_FRAGS_ID);
|
|
|
|
ret = tb_register_property_dir("network", tbnet_dir);
|
|
if (ret) {
|
|
tb_property_free_dir(tbnet_dir);
|
|
return ret;
|
|
}
|
|
|
|
return tb_register_service_driver(&tbnet_driver);
|
|
}
|
|
module_init(tbnet_init);
|
|
|
|
static void __exit tbnet_exit(void)
|
|
{
|
|
tb_unregister_service_driver(&tbnet_driver);
|
|
tb_unregister_property_dir("network", tbnet_dir);
|
|
tb_property_free_dir(tbnet_dir);
|
|
}
|
|
module_exit(tbnet_exit);
|
|
|
|
MODULE_AUTHOR("Amir Levy <amir.jer.levy@intel.com>");
|
|
MODULE_AUTHOR("Michael Jamet <michael.jamet@intel.com>");
|
|
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
|
|
MODULE_DESCRIPTION("Thunderbolt network driver");
|
|
MODULE_LICENSE("GPL v2");
|