^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Networking over Thunderbolt cable using Apple ThunderboltIP protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2017, Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Authors: Amir Levy <amir.jer.levy@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Michael Jamet <michael.jamet@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Mika Westerberg <mika.westerberg@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/if_vlan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/jhash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/sizes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/thunderbolt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/uuid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <net/ip6_checksum.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* Protocol timeouts in ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define TBNET_LOGIN_DELAY 4500
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define TBNET_LOGIN_TIMEOUT 500
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define TBNET_LOGOUT_TIMEOUT 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define TBNET_RING_SIZE 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define TBNET_LOCAL_PATH 0xf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define TBNET_LOGIN_RETRIES 60
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define TBNET_LOGOUT_RETRIES 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define TBNET_MATCH_FRAGS_ID BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define TBNET_MAX_MTU SZ_64K
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define TBNET_FRAME_SIZE SZ_4K
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define TBNET_MAX_PAYLOAD_SIZE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) (TBNET_FRAME_SIZE - sizeof(struct thunderbolt_ip_frame_header))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /* Rx packets need to hold space for skb_shared_info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define TBNET_RX_MAX_SIZE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) (TBNET_FRAME_SIZE + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define TBNET_RX_PAGE_ORDER get_order(TBNET_RX_MAX_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define TBNET_RX_PAGE_SIZE (PAGE_SIZE << TBNET_RX_PAGE_ORDER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define TBNET_L0_PORT_NUM(route) ((route) & GENMASK(5, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * struct thunderbolt_ip_frame_header - Header for each Thunderbolt frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * @frame_size: size of the data with the frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * @frame_index: running index on the frames
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * @frame_id: ID of the frame to match frames to specific packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * @frame_count: how many frames assembles a full packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * Each data frame passed to the high-speed DMA ring has this header. If
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * the XDomain network directory announces that %TBNET_MATCH_FRAGS_ID is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * supported then @frame_id is filled, otherwise it stays %0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct thunderbolt_ip_frame_header {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) u32 frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) u16 frame_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) u16 frame_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) u32 frame_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) enum thunderbolt_ip_frame_pdf {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) TBIP_PDF_FRAME_START = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) TBIP_PDF_FRAME_END,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) enum thunderbolt_ip_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) TBIP_LOGIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) TBIP_LOGIN_RESPONSE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) TBIP_LOGOUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) TBIP_STATUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct thunderbolt_ip_header {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) u32 route_hi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) u32 route_lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) u32 length_sn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) uuid_t uuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) uuid_t initiator_uuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) uuid_t target_uuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) u32 type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) u32 command_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define TBIP_HDR_LENGTH_MASK GENMASK(5, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #define TBIP_HDR_SN_MASK GENMASK(28, 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #define TBIP_HDR_SN_SHIFT 27
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct thunderbolt_ip_login {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct thunderbolt_ip_header hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) u32 proto_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) u32 transmit_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) u32 reserved[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #define TBIP_LOGIN_PROTO_VERSION 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct thunderbolt_ip_login_response {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct thunderbolt_ip_header hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) u32 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) u32 receiver_mac[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) u32 receiver_mac_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) u32 reserved[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct thunderbolt_ip_logout {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct thunderbolt_ip_header hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct thunderbolt_ip_status {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct thunderbolt_ip_header hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) u32 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct tbnet_stats {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) u64 tx_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) u64 rx_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) u64 tx_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) u64 rx_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) u64 rx_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) u64 tx_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) u64 rx_length_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) u64 rx_over_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) u64 rx_crc_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) u64 rx_missed_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct tbnet_frame {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct ring_frame frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct tbnet_ring {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct tbnet_frame frames[TBNET_RING_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) unsigned int cons;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) unsigned int prod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct tb_ring *ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * struct tbnet - ThunderboltIP network driver private data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * @svc: XDomain service the driver is bound to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * @xd: XDomain the service blongs to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * @handler: ThunderboltIP configuration protocol handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * @dev: Networking device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * @napi: NAPI structure for Rx polling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * @stats: Network statistics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * @skb: Network packet that is currently processed on Rx path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * @command_id: ID used for next configuration protocol packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * @login_sent: ThunderboltIP login message successfully sent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * @login_received: ThunderboltIP login message received from the remote
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * host
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * @transmit_path: HopID the other end needs to use building the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * opposite side path.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * @connection_lock: Lock serializing access to @login_sent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * @login_received and @transmit_path.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * @login_retries: Number of login retries currently done
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * @login_work: Worker to send ThunderboltIP login packets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * @connected_work: Worker that finalizes the ThunderboltIP connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * setup and enables DMA paths for high speed data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * transfers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * @disconnect_work: Worker that handles tearing down the ThunderboltIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * @rx_hdr: Copy of the currently processed Rx frame. Used when a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * network packet consists of multiple Thunderbolt frames.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * In host byte order.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * @rx_ring: Software ring holding Rx frames
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * @frame_id: Frame ID use for next Tx packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * (if %TBNET_MATCH_FRAGS_ID is supported in both ends)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * @tx_ring: Software ring holding Tx frames
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct tbnet {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) const struct tb_service *svc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct tb_xdomain *xd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct tb_protocol_handler handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct napi_struct napi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct tbnet_stats stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) atomic_t command_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) bool login_sent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) bool login_received;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) u32 transmit_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct mutex connection_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int login_retries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) struct delayed_work login_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct work_struct connected_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) struct work_struct disconnect_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct thunderbolt_ip_frame_header rx_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct tbnet_ring rx_ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) atomic_t frame_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) struct tbnet_ring tx_ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /* Network property directory UUID: c66189ca-1cce-4195-bdb8-49592e5f5a4f */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static const uuid_t tbnet_dir_uuid =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) UUID_INIT(0xc66189ca, 0x1cce, 0x4195,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 0xbd, 0xb8, 0x49, 0x59, 0x2e, 0x5f, 0x5a, 0x4f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /* ThunderboltIP protocol UUID: 798f589e-3616-8a47-97c6-5664a920c8dd */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static const uuid_t tbnet_svc_uuid =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) UUID_INIT(0x798f589e, 0x3616, 0x8a47,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 0x97, 0xc6, 0x56, 0x64, 0xa9, 0x20, 0xc8, 0xdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static struct tb_property_dir *tbnet_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static void tbnet_fill_header(struct thunderbolt_ip_header *hdr, u64 route,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) u8 sequence, const uuid_t *initiator_uuid, const uuid_t *target_uuid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) enum thunderbolt_ip_type type, size_t size, u32 command_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) u32 length_sn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /* Length does not include route_hi/lo and length_sn fields */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) length_sn = (size - 3 * 4) / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) length_sn |= (sequence << TBIP_HDR_SN_SHIFT) & TBIP_HDR_SN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) hdr->route_hi = upper_32_bits(route);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) hdr->route_lo = lower_32_bits(route);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) hdr->length_sn = length_sn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) uuid_copy(&hdr->uuid, &tbnet_svc_uuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) uuid_copy(&hdr->initiator_uuid, initiator_uuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) uuid_copy(&hdr->target_uuid, target_uuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) hdr->type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) hdr->command_id = command_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static int tbnet_login_response(struct tbnet *net, u64 route, u8 sequence,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) u32 command_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct thunderbolt_ip_login_response reply;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct tb_xdomain *xd = net->xd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) memset(&reply, 0, sizeof(reply));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) tbnet_fill_header(&reply.hdr, route, sequence, xd->local_uuid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) xd->remote_uuid, TBIP_LOGIN_RESPONSE, sizeof(reply),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) command_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) memcpy(reply.receiver_mac, net->dev->dev_addr, ETH_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) reply.receiver_mac_len = ETH_ALEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return tb_xdomain_response(xd, &reply, sizeof(reply),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) TB_CFG_PKG_XDOMAIN_RESP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static int tbnet_login_request(struct tbnet *net, u8 sequence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct thunderbolt_ip_login_response reply;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct thunderbolt_ip_login request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct tb_xdomain *xd = net->xd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) memset(&request, 0, sizeof(request));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) tbnet_fill_header(&request.hdr, xd->route, sequence, xd->local_uuid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) xd->remote_uuid, TBIP_LOGIN, sizeof(request),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) atomic_inc_return(&net->command_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) request.proto_version = TBIP_LOGIN_PROTO_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) request.transmit_path = TBNET_LOCAL_PATH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return tb_xdomain_request(xd, &request, sizeof(request),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) TB_CFG_PKG_XDOMAIN_RESP, &reply,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) sizeof(reply), TB_CFG_PKG_XDOMAIN_RESP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) TBNET_LOGIN_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) static int tbnet_logout_response(struct tbnet *net, u64 route, u8 sequence,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) u32 command_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct thunderbolt_ip_status reply;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) struct tb_xdomain *xd = net->xd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) memset(&reply, 0, sizeof(reply));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) tbnet_fill_header(&reply.hdr, route, sequence, xd->local_uuid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) xd->remote_uuid, TBIP_STATUS, sizeof(reply),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) atomic_inc_return(&net->command_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) return tb_xdomain_response(xd, &reply, sizeof(reply),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) TB_CFG_PKG_XDOMAIN_RESP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static int tbnet_logout_request(struct tbnet *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct thunderbolt_ip_logout request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct thunderbolt_ip_status reply;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) struct tb_xdomain *xd = net->xd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) memset(&request, 0, sizeof(request));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) tbnet_fill_header(&request.hdr, xd->route, 0, xd->local_uuid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) xd->remote_uuid, TBIP_LOGOUT, sizeof(request),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) atomic_inc_return(&net->command_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return tb_xdomain_request(xd, &request, sizeof(request),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) TB_CFG_PKG_XDOMAIN_RESP, &reply,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) sizeof(reply), TB_CFG_PKG_XDOMAIN_RESP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) TBNET_LOGOUT_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static void start_login(struct tbnet *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) mutex_lock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) net->login_sent = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) net->login_received = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) mutex_unlock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) queue_delayed_work(system_long_wq, &net->login_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) msecs_to_jiffies(1000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) static void stop_login(struct tbnet *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) cancel_delayed_work_sync(&net->login_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) cancel_work_sync(&net->connected_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static inline unsigned int tbnet_frame_size(const struct tbnet_frame *tf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) return tf->frame.size ? : TBNET_FRAME_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) static void tbnet_free_buffers(struct tbnet_ring *ring)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) for (i = 0; i < TBNET_RING_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) struct device *dma_dev = tb_ring_dma_device(ring->ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) struct tbnet_frame *tf = &ring->frames[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) enum dma_data_direction dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) unsigned int order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (!tf->page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (ring->ring->is_tx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) dir = DMA_TO_DEVICE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) order = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) size = TBNET_FRAME_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) dir = DMA_FROM_DEVICE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) order = TBNET_RX_PAGE_ORDER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) size = TBNET_RX_PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (tf->frame.buffer_phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) dma_unmap_page(dma_dev, tf->frame.buffer_phy, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) __free_pages(tf->page, order);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) tf->page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) ring->cons = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) ring->prod = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) static void tbnet_tear_down(struct tbnet *net, bool send_logout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) netif_carrier_off(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) netif_stop_queue(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) stop_login(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) mutex_lock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (net->login_sent && net->login_received) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) int retries = TBNET_LOGOUT_RETRIES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) while (send_logout && retries-- > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) int ret = tbnet_logout_request(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (ret != -ETIMEDOUT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) tb_ring_stop(net->rx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) tb_ring_stop(net->tx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) tbnet_free_buffers(&net->rx_ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) tbnet_free_buffers(&net->tx_ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (tb_xdomain_disable_paths(net->xd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) netdev_warn(net->dev, "failed to disable DMA paths\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) net->login_retries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) net->login_sent = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) net->login_received = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) mutex_unlock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) static int tbnet_handle_packet(const void *buf, size_t size, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) const struct thunderbolt_ip_login *pkg = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct tbnet *net = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) u32 command_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) u32 sequence;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) u64 route;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) /* Make sure the packet is for us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if (size < sizeof(struct thunderbolt_ip_header))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (!uuid_equal(&pkg->hdr.initiator_uuid, net->xd->remote_uuid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (!uuid_equal(&pkg->hdr.target_uuid, net->xd->local_uuid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) route = ((u64)pkg->hdr.route_hi << 32) | pkg->hdr.route_lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) route &= ~BIT_ULL(63);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (route != net->xd->route)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) sequence = pkg->hdr.length_sn & TBIP_HDR_SN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) sequence >>= TBIP_HDR_SN_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) command_id = pkg->hdr.command_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) switch (pkg->hdr.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) case TBIP_LOGIN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) if (!netif_running(net->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) ret = tbnet_login_response(net, route, sequence,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) pkg->hdr.command_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) mutex_lock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) net->login_received = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) net->transmit_path = pkg->transmit_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) /* If we reached the number of max retries or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * previous logout, schedule another round of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * login retries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (net->login_retries >= TBNET_LOGIN_RETRIES ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) !net->login_sent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) net->login_retries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) queue_delayed_work(system_long_wq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) &net->login_work, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) mutex_unlock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) queue_work(system_long_wq, &net->connected_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) case TBIP_LOGOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) ret = tbnet_logout_response(net, route, sequence, command_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) queue_work(system_long_wq, &net->disconnect_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) netdev_warn(net->dev, "failed to send ThunderboltIP response\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) static unsigned int tbnet_available_buffers(const struct tbnet_ring *ring)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return ring->prod - ring->cons;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) static int tbnet_alloc_rx_buffers(struct tbnet *net, unsigned int nbuffers)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) struct tbnet_ring *ring = &net->rx_ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) while (nbuffers--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) struct device *dma_dev = tb_ring_dma_device(ring->ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) unsigned int index = ring->prod & (TBNET_RING_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) struct tbnet_frame *tf = &ring->frames[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) dma_addr_t dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) if (tf->page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) /* Allocate page (order > 0) so that it can hold maximum
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) * ThunderboltIP frame (4kB) and the additional room for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) * SKB shared info required by build_skb().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) tf->page = dev_alloc_pages(TBNET_RX_PAGE_ORDER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (!tf->page) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) dma_addr = dma_map_page(dma_dev, tf->page, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) TBNET_RX_PAGE_SIZE, DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (dma_mapping_error(dma_dev, dma_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) tf->frame.buffer_phy = dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) tf->dev = net->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) tb_ring_rx(ring->ring, &tf->frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) ring->prod++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) err_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) tbnet_free_buffers(ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) static struct tbnet_frame *tbnet_get_tx_buffer(struct tbnet *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) struct tbnet_ring *ring = &net->tx_ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) struct device *dma_dev = tb_ring_dma_device(ring->ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) struct tbnet_frame *tf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) unsigned int index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (!tbnet_available_buffers(ring))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) index = ring->cons++ & (TBNET_RING_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) tf = &ring->frames[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) tf->frame.size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) dma_sync_single_for_cpu(dma_dev, tf->frame.buffer_phy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) tbnet_frame_size(tf), DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) return tf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) static void tbnet_tx_callback(struct tb_ring *ring, struct ring_frame *frame,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) bool canceled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) struct tbnet_frame *tf = container_of(frame, typeof(*tf), frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) struct tbnet *net = netdev_priv(tf->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) /* Return buffer to the ring */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) net->tx_ring.prod++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (tbnet_available_buffers(&net->tx_ring) >= TBNET_RING_SIZE / 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) netif_wake_queue(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) static int tbnet_alloc_tx_buffers(struct tbnet *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) struct tbnet_ring *ring = &net->tx_ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) struct device *dma_dev = tb_ring_dma_device(ring->ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) for (i = 0; i < TBNET_RING_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) struct tbnet_frame *tf = &ring->frames[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) dma_addr_t dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) tf->page = alloc_page(GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) if (!tf->page) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) tbnet_free_buffers(ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) dma_addr = dma_map_page(dma_dev, tf->page, 0, TBNET_FRAME_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) if (dma_mapping_error(dma_dev, dma_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) __free_page(tf->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) tf->page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) tbnet_free_buffers(ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) tf->dev = net->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) tf->frame.buffer_phy = dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) tf->frame.callback = tbnet_tx_callback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) tf->frame.sof = TBIP_PDF_FRAME_START;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) tf->frame.eof = TBIP_PDF_FRAME_END;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) ring->cons = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) ring->prod = TBNET_RING_SIZE - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) static void tbnet_connected_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) struct tbnet *net = container_of(work, typeof(*net), connected_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) bool connected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if (netif_carrier_ok(net->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) mutex_lock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) connected = net->login_sent && net->login_received;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) mutex_unlock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (!connected)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) /* Both logins successful so enable the high-speed DMA paths and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) * start the network device queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) ret = tb_xdomain_enable_paths(net->xd, TBNET_LOCAL_PATH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) net->rx_ring.ring->hop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) net->transmit_path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) net->tx_ring.ring->hop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) netdev_err(net->dev, "failed to enable DMA paths\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) tb_ring_start(net->tx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) tb_ring_start(net->rx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) ret = tbnet_alloc_rx_buffers(net, TBNET_RING_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) goto err_stop_rings;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) ret = tbnet_alloc_tx_buffers(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) goto err_free_rx_buffers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) netif_carrier_on(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) netif_start_queue(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) err_free_rx_buffers:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) tbnet_free_buffers(&net->rx_ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) err_stop_rings:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) tb_ring_stop(net->rx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) tb_ring_stop(net->tx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) static void tbnet_login_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) struct tbnet *net = container_of(work, typeof(*net), login_work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) unsigned long delay = msecs_to_jiffies(TBNET_LOGIN_DELAY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) if (netif_carrier_ok(net->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) ret = tbnet_login_request(net, net->login_retries % 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) if (net->login_retries++ < TBNET_LOGIN_RETRIES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) queue_delayed_work(system_long_wq, &net->login_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) netdev_info(net->dev, "ThunderboltIP login timed out\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) net->login_retries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) mutex_lock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) net->login_sent = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) mutex_unlock(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) queue_work(system_long_wq, &net->connected_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) static void tbnet_disconnect_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) struct tbnet *net = container_of(work, typeof(*net), disconnect_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) tbnet_tear_down(net, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) static bool tbnet_check_frame(struct tbnet *net, const struct tbnet_frame *tf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) const struct thunderbolt_ip_frame_header *hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) u32 frame_id, frame_count, frame_size, frame_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) if (tf->frame.flags & RING_DESC_CRC_ERROR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) net->stats.rx_crc_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) } else if (tf->frame.flags & RING_DESC_BUFFER_OVERRUN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) net->stats.rx_over_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) /* Should be greater than just header i.e. contains data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) size = tbnet_frame_size(tf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) if (size <= sizeof(*hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) net->stats.rx_length_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) frame_count = le32_to_cpu(hdr->frame_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) frame_size = le32_to_cpu(hdr->frame_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) frame_index = le16_to_cpu(hdr->frame_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) frame_id = le16_to_cpu(hdr->frame_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if ((frame_size > size - sizeof(*hdr)) || !frame_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) net->stats.rx_length_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) /* In case we're in the middle of packet, validate the frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) * header based on first fragment of the packet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) if (net->skb && net->rx_hdr.frame_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) /* Check the frame count fits the count field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) if (frame_count != net->rx_hdr.frame_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) net->stats.rx_length_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) /* Check the frame identifiers are incremented correctly,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) * and id is matching.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) if (frame_index != net->rx_hdr.frame_index + 1 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) frame_id != net->rx_hdr.frame_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) net->stats.rx_missed_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) if (net->skb->len + frame_size > TBNET_MAX_MTU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) net->stats.rx_length_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) /* Start of packet, validate the frame header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) if (frame_count == 0 || frame_count > TBNET_RING_SIZE / 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) net->stats.rx_length_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) if (frame_index != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) net->stats.rx_missed_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) static int tbnet_poll(struct napi_struct *napi, int budget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) struct tbnet *net = container_of(napi, struct tbnet, napi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) unsigned int cleaned_count = tbnet_available_buffers(&net->rx_ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) struct device *dma_dev = tb_ring_dma_device(net->rx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) unsigned int rx_packets = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) while (rx_packets < budget) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) const struct thunderbolt_ip_frame_header *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) unsigned int hdr_size = sizeof(*hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) struct sk_buff *skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) struct ring_frame *frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) struct tbnet_frame *tf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) bool last = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) u32 frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) /* Return some buffers to hardware, one at a time is too
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) * slow so allocate MAX_SKB_FRAGS buffers at the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) * time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) if (cleaned_count >= MAX_SKB_FRAGS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) tbnet_alloc_rx_buffers(net, cleaned_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) cleaned_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) frame = tb_ring_poll(net->rx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) if (!frame)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) dma_unmap_page(dma_dev, frame->buffer_phy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) TBNET_RX_PAGE_SIZE, DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) tf = container_of(frame, typeof(*tf), frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) page = tf->page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) tf->page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) net->rx_ring.cons++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) cleaned_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) hdr = page_address(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) if (!tbnet_check_frame(net, tf, hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) __free_pages(page, TBNET_RX_PAGE_ORDER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) dev_kfree_skb_any(net->skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) net->skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) frame_size = le32_to_cpu(hdr->frame_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) skb = net->skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) skb = build_skb(page_address(page),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) TBNET_RX_PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) __free_pages(page, TBNET_RX_PAGE_ORDER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) net->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) skb_reserve(skb, hdr_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) skb_put(skb, frame_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) net->skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) page, hdr_size, frame_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) TBNET_RX_PAGE_SIZE - hdr_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) net->rx_hdr.frame_size = frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) net->rx_hdr.frame_count = le32_to_cpu(hdr->frame_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) net->rx_hdr.frame_index = le16_to_cpu(hdr->frame_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) net->rx_hdr.frame_id = le16_to_cpu(hdr->frame_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) last = net->rx_hdr.frame_index == net->rx_hdr.frame_count - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) net->stats.rx_bytes += frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) if (last) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) skb->protocol = eth_type_trans(skb, net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) napi_gro_receive(&net->napi, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) net->skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) net->stats.rx_packets += rx_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) if (cleaned_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) tbnet_alloc_rx_buffers(net, cleaned_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (rx_packets >= budget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) return budget;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) napi_complete_done(napi, rx_packets);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) /* Re-enable the ring interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) tb_ring_poll_complete(net->rx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) return rx_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) static void tbnet_start_poll(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) struct tbnet *net = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) napi_schedule(&net->napi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) static int tbnet_open(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) struct tbnet *net = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) struct tb_xdomain *xd = net->xd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) u16 sof_mask, eof_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) struct tb_ring *ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) netif_carrier_off(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) ring = tb_ring_alloc_tx(xd->tb->nhi, -1, TBNET_RING_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) RING_FLAG_FRAME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) if (!ring) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) netdev_err(dev, "failed to allocate Tx ring\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) net->tx_ring.ring = ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) sof_mask = BIT(TBIP_PDF_FRAME_START);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) eof_mask = BIT(TBIP_PDF_FRAME_END);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) ring = tb_ring_alloc_rx(xd->tb->nhi, -1, TBNET_RING_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) RING_FLAG_FRAME, sof_mask, eof_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) tbnet_start_poll, net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) if (!ring) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) netdev_err(dev, "failed to allocate Rx ring\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) tb_ring_free(net->tx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) net->tx_ring.ring = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) net->rx_ring.ring = ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) napi_enable(&net->napi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) start_login(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) static int tbnet_stop(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) struct tbnet *net = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) napi_disable(&net->napi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) cancel_work_sync(&net->disconnect_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) tbnet_tear_down(net, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) tb_ring_free(net->rx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) net->rx_ring.ring = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) tb_ring_free(net->tx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) net->tx_ring.ring = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) static bool tbnet_xmit_csum_and_map(struct tbnet *net, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) struct tbnet_frame **frames, u32 frame_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) struct thunderbolt_ip_frame_header *hdr = page_address(frames[0]->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) struct device *dma_dev = tb_ring_dma_device(net->tx_ring.ring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) __wsum wsum = htonl(skb->len - skb_transport_offset(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) unsigned int i, len, offset = skb_transport_offset(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) __be16 protocol = skb->protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) void *data = skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) void *dest = hdr + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) __sum16 *tucso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) if (skb->ip_summed != CHECKSUM_PARTIAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) /* No need to calculate checksum so we just update the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) * total frame count and sync the frames for DMA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) for (i = 0; i < frame_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) hdr = page_address(frames[i]->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) hdr->frame_count = cpu_to_le32(frame_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) dma_sync_single_for_device(dma_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) frames[i]->frame.buffer_phy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) tbnet_frame_size(frames[i]), DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) if (protocol == htons(ETH_P_8021Q)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) struct vlan_hdr *vhdr, vh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(vh), &vh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) if (!vhdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) protocol = vhdr->h_vlan_encapsulated_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) /* Data points on the beginning of packet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) * Check is the checksum absolute place in the packet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) * ipcso will update IP checksum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) * tucso will update TCP/UPD checksum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) if (protocol == htons(ETH_P_IP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) __sum16 *ipcso = dest + ((void *)&(ip_hdr(skb)->check) - data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) *ipcso = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) *ipcso = ip_fast_csum(dest + skb_network_offset(skb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) ip_hdr(skb)->ihl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) if (ip_hdr(skb)->protocol == IPPROTO_TCP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) tucso = dest + ((void *)&(udp_hdr(skb)->check) - data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) *tucso = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) ip_hdr(skb)->daddr, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) ip_hdr(skb)->protocol, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) } else if (skb_is_gso_v6(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) *tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) &ipv6_hdr(skb)->daddr, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) IPPROTO_TCP, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) } else if (protocol == htons(ETH_P_IPV6)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) tucso = dest + skb_checksum_start_offset(skb) + skb->csum_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) *tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) &ipv6_hdr(skb)->daddr, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) ipv6_hdr(skb)->nexthdr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) /* First frame was headers, rest of the frames contain data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) * Calculate checksum over each frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) for (i = 0; i < frame_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) hdr = page_address(frames[i]->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) dest = (void *)(hdr + 1) + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) len = le32_to_cpu(hdr->frame_size) - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) wsum = csum_partial(dest, len, wsum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) hdr->frame_count = cpu_to_le32(frame_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) *tucso = csum_fold(wsum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) /* Checksum is finally calculated and we don't touch the memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) * anymore, so DMA sync the frames now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) for (i = 0; i < frame_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) dma_sync_single_for_device(dma_dev, frames[i]->frame.buffer_phy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) tbnet_frame_size(frames[i]), DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) static void *tbnet_kmap_frag(struct sk_buff *skb, unsigned int frag_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) unsigned int *len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) const skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_num];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) *len = skb_frag_size(frag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) return kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) static netdev_tx_t tbnet_start_xmit(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) struct tbnet *net = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) struct tbnet_frame *frames[MAX_SKB_FRAGS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) u16 frame_id = atomic_read(&net->frame_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) struct thunderbolt_ip_frame_header *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) unsigned int len = skb_headlen(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) unsigned int data_len = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) unsigned int nframes, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) unsigned int frag = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) void *src = skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) u32 frame_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) bool unmap = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) void *dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) nframes = DIV_ROUND_UP(data_len, TBNET_MAX_PAYLOAD_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) if (tbnet_available_buffers(&net->tx_ring) < nframes) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) netif_stop_queue(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) return NETDEV_TX_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) frames[frame_index] = tbnet_get_tx_buffer(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) if (!frames[frame_index])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) goto err_drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) hdr = page_address(frames[frame_index]->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) dest = hdr + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) /* If overall packet is bigger than the frame data size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) while (data_len > TBNET_MAX_PAYLOAD_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) unsigned int size_left = TBNET_MAX_PAYLOAD_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) hdr->frame_size = cpu_to_le32(TBNET_MAX_PAYLOAD_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) hdr->frame_index = cpu_to_le16(frame_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) hdr->frame_id = cpu_to_le16(frame_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) if (len > size_left) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) /* Copy data onto Tx buffer data with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) * full frame size then break and go to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) * next frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) memcpy(dest, src, size_left);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) len -= size_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) dest += size_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) src += size_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) memcpy(dest, src, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) size_left -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) dest += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) if (unmap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) kunmap_atomic(src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) unmap = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) /* Ensure all fragments have been processed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) if (frag < skb_shinfo(skb)->nr_frags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) /* Map and then unmap quickly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) src = tbnet_kmap_frag(skb, frag++, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) unmap = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) } else if (unlikely(size_left > 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) goto err_drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) } while (size_left > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) data_len -= TBNET_MAX_PAYLOAD_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) frame_index++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) frames[frame_index] = tbnet_get_tx_buffer(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) if (!frames[frame_index])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) goto err_drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) hdr = page_address(frames[frame_index]->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) dest = hdr + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) hdr->frame_size = cpu_to_le32(data_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) hdr->frame_index = cpu_to_le16(frame_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) hdr->frame_id = cpu_to_le16(frame_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) frames[frame_index]->frame.size = data_len + sizeof(*hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) /* In case the remaining data_len is smaller than a frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) while (len < data_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) memcpy(dest, src, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) data_len -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) dest += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) if (unmap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) kunmap_atomic(src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) unmap = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) if (frag < skb_shinfo(skb)->nr_frags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) src = tbnet_kmap_frag(skb, frag++, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) unmap = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) } else if (unlikely(data_len > 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) goto err_drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) memcpy(dest, src, data_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) if (unmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) kunmap_atomic(src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) if (!tbnet_xmit_csum_and_map(net, skb, frames, frame_index + 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) goto err_drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) for (i = 0; i < frame_index + 1; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) tb_ring_tx(net->tx_ring.ring, &frames[i]->frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) if (net->svc->prtcstns & TBNET_MATCH_FRAGS_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) atomic_inc(&net->frame_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) net->stats.tx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) net->stats.tx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) dev_consume_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) err_drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) /* We can re-use the buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) net->tx_ring.cons -= frame_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) net->stats.tx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) static void tbnet_get_stats64(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) struct rtnl_link_stats64 *stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) struct tbnet *net = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) stats->tx_packets = net->stats.tx_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) stats->rx_packets = net->stats.rx_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) stats->tx_bytes = net->stats.tx_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) stats->rx_bytes = net->stats.rx_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) stats->rx_errors = net->stats.rx_errors + net->stats.rx_length_errors +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) net->stats.rx_over_errors + net->stats.rx_crc_errors +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) net->stats.rx_missed_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) stats->tx_errors = net->stats.tx_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) stats->rx_length_errors = net->stats.rx_length_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) stats->rx_over_errors = net->stats.rx_over_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) stats->rx_crc_errors = net->stats.rx_crc_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) stats->rx_missed_errors = net->stats.rx_missed_errors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) static const struct net_device_ops tbnet_netdev_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) .ndo_open = tbnet_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) .ndo_stop = tbnet_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) .ndo_start_xmit = tbnet_start_xmit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) .ndo_get_stats64 = tbnet_get_stats64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) static void tbnet_generate_mac(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) const struct tbnet *net = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) const struct tb_xdomain *xd = net->xd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) u8 phy_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) u32 hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) phy_port = tb_phy_port_from_link(TBNET_L0_PORT_NUM(xd->route));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) /* Unicast and locally administered MAC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) dev->dev_addr[0] = phy_port << 4 | 0x02;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) hash = jhash2((u32 *)xd->local_uuid, 4, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) memcpy(dev->dev_addr + 1, &hash, sizeof(hash));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) hash = jhash2((u32 *)xd->local_uuid, 4, hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) dev->dev_addr[5] = hash & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) static int tbnet_probe(struct tb_service *svc, const struct tb_service_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) struct tb_xdomain *xd = tb_service_parent(svc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) struct tbnet *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) dev = alloc_etherdev(sizeof(*net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) SET_NETDEV_DEV(dev, &svc->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) net = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) INIT_DELAYED_WORK(&net->login_work, tbnet_login_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) INIT_WORK(&net->connected_work, tbnet_connected_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) INIT_WORK(&net->disconnect_work, tbnet_disconnect_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) mutex_init(&net->connection_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) atomic_set(&net->command_id, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) atomic_set(&net->frame_id, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) net->svc = svc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) net->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) net->xd = xd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) tbnet_generate_mac(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) strcpy(dev->name, "thunderbolt%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) dev->netdev_ops = &tbnet_netdev_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) /* ThunderboltIP takes advantage of TSO packets but instead of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) * segmenting them we just split the packet into Thunderbolt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) * frames (maximum payload size of each frame is 4084 bytes) and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) * calculate checksum over the whole packet here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) * The receiving side does the opposite if the host OS supports
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) * LRO, otherwise it needs to split the large packet into MTU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) * sized smaller packets.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) * In order to receive large packets from the networking stack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) * we need to announce support for most of the offloading
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) * features here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) dev->hw_features = NETIF_F_SG | NETIF_F_ALL_TSO | NETIF_F_GRO |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) dev->features = dev->hw_features | NETIF_F_HIGHDMA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) dev->hard_header_len += sizeof(struct thunderbolt_ip_frame_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) netif_napi_add(dev, &net->napi, tbnet_poll, NAPI_POLL_WEIGHT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) /* MTU range: 68 - 65522 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) dev->min_mtu = ETH_MIN_MTU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) dev->max_mtu = TBNET_MAX_MTU - ETH_HLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) net->handler.uuid = &tbnet_svc_uuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) net->handler.callback = tbnet_handle_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) net->handler.data = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) tb_register_protocol_handler(&net->handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) tb_service_set_drvdata(svc, net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) ret = register_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) tb_unregister_protocol_handler(&net->handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) free_netdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) static void tbnet_remove(struct tb_service *svc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) struct tbnet *net = tb_service_get_drvdata(svc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) unregister_netdev(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) tb_unregister_protocol_handler(&net->handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) free_netdev(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) static void tbnet_shutdown(struct tb_service *svc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) tbnet_tear_down(tb_service_get_drvdata(svc), true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) static int __maybe_unused tbnet_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) struct tb_service *svc = tb_to_service(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) struct tbnet *net = tb_service_get_drvdata(svc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) stop_login(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) if (netif_running(net->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) netif_device_detach(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) tbnet_tear_down(net, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) tb_unregister_protocol_handler(&net->handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) static int __maybe_unused tbnet_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) struct tb_service *svc = tb_to_service(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) struct tbnet *net = tb_service_get_drvdata(svc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) tb_register_protocol_handler(&net->handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) netif_carrier_off(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) if (netif_running(net->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) netif_device_attach(net->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) start_login(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) static const struct dev_pm_ops tbnet_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) SET_SYSTEM_SLEEP_PM_OPS(tbnet_suspend, tbnet_resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) static const struct tb_service_id tbnet_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) { TB_SERVICE("network", 1) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) MODULE_DEVICE_TABLE(tbsvc, tbnet_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) static struct tb_service_driver tbnet_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) .name = "thunderbolt-net",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) .pm = &tbnet_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) .probe = tbnet_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) .remove = tbnet_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) .shutdown = tbnet_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) .id_table = tbnet_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) static int __init tbnet_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) tbnet_dir = tb_property_create_dir(&tbnet_dir_uuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) if (!tbnet_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) tb_property_add_immediate(tbnet_dir, "prtcid", 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) tb_property_add_immediate(tbnet_dir, "prtcvers", 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) tb_property_add_immediate(tbnet_dir, "prtcrevs", 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) /* Currently only announce support for match frags ID (bit 1). Bit 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) * is reserved for full E2E flow control which we do not support at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) * the moment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) tb_property_add_immediate(tbnet_dir, "prtcstns",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) TBNET_MATCH_FRAGS_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) ret = tb_register_property_dir("network", tbnet_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) tb_property_free_dir(tbnet_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) return tb_register_service_driver(&tbnet_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) module_init(tbnet_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) static void __exit tbnet_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) tb_unregister_service_driver(&tbnet_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) tb_unregister_property_dir("network", tbnet_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) tb_property_free_dir(tbnet_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) module_exit(tbnet_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) MODULE_AUTHOR("Amir Levy <amir.jer.levy@intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) MODULE_AUTHOR("Michael Jamet <michael.jamet@intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) MODULE_DESCRIPTION("Thunderbolt network driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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