| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Networking over Thunderbolt cable using Apple ThunderboltIP protocol |
| * |
| * Copyright (C) 2017, Intel Corporation |
| * Authors: Amir Levy <amir.jer.levy@intel.com> |
| * Michael Jamet <michael.jamet@intel.com> |
| * Mika Westerberg <mika.westerberg@linux.intel.com> |
| */ |
| |
| #include <linux/atomic.h> |
| #include <linux/highmem.h> |
| #include <linux/if_vlan.h> |
| #include <linux/jhash.h> |
| #include <linux/module.h> |
| #include <linux/etherdevice.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/sizes.h> |
| #include <linux/thunderbolt.h> |
| #include <linux/uuid.h> |
| #include <linux/workqueue.h> |
| |
| #include <net/ip6_checksum.h> |
| |
| /* Protocol timeouts in ms */ |
| #define TBNET_LOGIN_DELAY 4500 |
| #define TBNET_LOGIN_TIMEOUT 500 |
| #define TBNET_LOGOUT_TIMEOUT 1000 |
| |
| #define TBNET_RING_SIZE 256 |
| #define TBNET_LOGIN_RETRIES 60 |
| #define TBNET_LOGOUT_RETRIES 10 |
| #define TBNET_MATCH_FRAGS_ID BIT(1) |
| #define TBNET_64K_FRAMES BIT(2) |
| #define TBNET_MAX_MTU SZ_64K |
| #define TBNET_FRAME_SIZE SZ_4K |
| #define TBNET_MAX_PAYLOAD_SIZE \ |
| (TBNET_FRAME_SIZE - sizeof(struct thunderbolt_ip_frame_header)) |
| /* Rx packets need to hold space for skb_shared_info */ |
| #define TBNET_RX_MAX_SIZE \ |
| (TBNET_FRAME_SIZE + SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) |
| #define TBNET_RX_PAGE_ORDER get_order(TBNET_RX_MAX_SIZE) |
| #define TBNET_RX_PAGE_SIZE (PAGE_SIZE << TBNET_RX_PAGE_ORDER) |
| |
| #define TBNET_L0_PORT_NUM(route) ((route) & GENMASK(5, 0)) |
| |
| /** |
| * struct thunderbolt_ip_frame_header - Header for each Thunderbolt frame |
| * @frame_size: size of the data with the frame |
| * @frame_index: running index on the frames |
| * @frame_id: ID of the frame to match frames to specific packet |
| * @frame_count: how many frames assembles a full packet |
| * |
| * Each data frame passed to the high-speed DMA ring has this header. If |
| * the XDomain network directory announces that %TBNET_MATCH_FRAGS_ID is |
| * supported then @frame_id is filled, otherwise it stays %0. |
| */ |
| struct thunderbolt_ip_frame_header { |
| u32 frame_size; |
| u16 frame_index; |
| u16 frame_id; |
| u32 frame_count; |
| }; |
| |
| enum thunderbolt_ip_frame_pdf { |
| TBIP_PDF_FRAME_START = 1, |
| TBIP_PDF_FRAME_END, |
| }; |
| |
| enum thunderbolt_ip_type { |
| TBIP_LOGIN, |
| TBIP_LOGIN_RESPONSE, |
| TBIP_LOGOUT, |
| TBIP_STATUS, |
| }; |
| |
| struct thunderbolt_ip_header { |
| u32 route_hi; |
| u32 route_lo; |
| u32 length_sn; |
| uuid_t uuid; |
| uuid_t initiator_uuid; |
| uuid_t target_uuid; |
| u32 type; |
| u32 command_id; |
| }; |
| |
| #define TBIP_HDR_LENGTH_MASK GENMASK(5, 0) |
| #define TBIP_HDR_SN_MASK GENMASK(28, 27) |
| #define TBIP_HDR_SN_SHIFT 27 |
| |
| struct thunderbolt_ip_login { |
| struct thunderbolt_ip_header hdr; |
| u32 proto_version; |
| u32 transmit_path; |
| u32 reserved[4]; |
| }; |
| |
| #define TBIP_LOGIN_PROTO_VERSION 1 |
| |
| struct thunderbolt_ip_login_response { |
| struct thunderbolt_ip_header hdr; |
| u32 status; |
| u32 receiver_mac[2]; |
| u32 receiver_mac_len; |
| u32 reserved[4]; |
| }; |
| |
| struct thunderbolt_ip_logout { |
| struct thunderbolt_ip_header hdr; |
| }; |
| |
| struct thunderbolt_ip_status { |
| struct thunderbolt_ip_header hdr; |
| u32 status; |
| }; |
| |
| struct tbnet_stats { |
| u64 tx_packets; |
| u64 rx_packets; |
| u64 tx_bytes; |
| u64 rx_bytes; |
| u64 rx_errors; |
| u64 tx_errors; |
| u64 rx_length_errors; |
| u64 rx_over_errors; |
| u64 rx_crc_errors; |
| u64 rx_missed_errors; |
| }; |
| |
| struct tbnet_frame { |
| struct net_device *dev; |
| struct page *page; |
| struct ring_frame frame; |
| }; |
| |
| struct tbnet_ring { |
| struct tbnet_frame frames[TBNET_RING_SIZE]; |
| unsigned int cons; |
| unsigned int prod; |
| struct tb_ring *ring; |
| }; |
| |
| /** |
| * struct tbnet - ThunderboltIP network driver private data |
| * @svc: XDomain service the driver is bound to |
| * @xd: XDomain the service blongs to |
| * @handler: ThunderboltIP configuration protocol handler |
| * @dev: Networking device |
| * @napi: NAPI structure for Rx polling |
| * @stats: Network statistics |
| * @skb: Network packet that is currently processed on Rx path |
| * @command_id: ID used for next configuration protocol packet |
| * @login_sent: ThunderboltIP login message successfully sent |
| * @login_received: ThunderboltIP login message received from the remote |
| * host |
| * @local_transmit_path: HopID we are using to send out packets |
| * @remote_transmit_path: HopID the other end is using to send packets to us |
| * @connection_lock: Lock serializing access to @login_sent, |
| * @login_received and @transmit_path. |
| * @login_retries: Number of login retries currently done |
| * @login_work: Worker to send ThunderboltIP login packets |
| * @connected_work: Worker that finalizes the ThunderboltIP connection |
| * setup and enables DMA paths for high speed data |
| * transfers |
| * @disconnect_work: Worker that handles tearing down the ThunderboltIP |
| * connection |
| * @rx_hdr: Copy of the currently processed Rx frame. Used when a |
| * network packet consists of multiple Thunderbolt frames. |
| * In host byte order. |
| * @rx_ring: Software ring holding Rx frames |
| * @frame_id: Frame ID use for next Tx packet |
| * (if %TBNET_MATCH_FRAGS_ID is supported in both ends) |
| * @tx_ring: Software ring holding Tx frames |
| */ |
| struct tbnet { |
| const struct tb_service *svc; |
| struct tb_xdomain *xd; |
| struct tb_protocol_handler handler; |
| struct net_device *dev; |
| struct napi_struct napi; |
| struct tbnet_stats stats; |
| struct sk_buff *skb; |
| atomic_t command_id; |
| bool login_sent; |
| bool login_received; |
| int local_transmit_path; |
| int remote_transmit_path; |
| struct mutex connection_lock; |
| int login_retries; |
| struct delayed_work login_work; |
| struct work_struct connected_work; |
| struct work_struct disconnect_work; |
| struct thunderbolt_ip_frame_header rx_hdr; |
| struct tbnet_ring rx_ring; |
| atomic_t frame_id; |
| struct tbnet_ring tx_ring; |
| }; |
| |
| /* Network property directory UUID: c66189ca-1cce-4195-bdb8-49592e5f5a4f */ |
| static const uuid_t tbnet_dir_uuid = |
| UUID_INIT(0xc66189ca, 0x1cce, 0x4195, |
| 0xbd, 0xb8, 0x49, 0x59, 0x2e, 0x5f, 0x5a, 0x4f); |
| |
| /* ThunderboltIP protocol UUID: 798f589e-3616-8a47-97c6-5664a920c8dd */ |
| static const uuid_t tbnet_svc_uuid = |
| UUID_INIT(0x798f589e, 0x3616, 0x8a47, |
| 0x97, 0xc6, 0x56, 0x64, 0xa9, 0x20, 0xc8, 0xdd); |
| |
| static struct tb_property_dir *tbnet_dir; |
| |
| static void tbnet_fill_header(struct thunderbolt_ip_header *hdr, u64 route, |
| u8 sequence, const uuid_t *initiator_uuid, const uuid_t *target_uuid, |
| enum thunderbolt_ip_type type, size_t size, u32 command_id) |
| { |
| u32 length_sn; |
| |
| /* Length does not include route_hi/lo and length_sn fields */ |
| length_sn = (size - 3 * 4) / 4; |
| length_sn |= (sequence << TBIP_HDR_SN_SHIFT) & TBIP_HDR_SN_MASK; |
| |
| hdr->route_hi = upper_32_bits(route); |
| hdr->route_lo = lower_32_bits(route); |
| hdr->length_sn = length_sn; |
| uuid_copy(&hdr->uuid, &tbnet_svc_uuid); |
| uuid_copy(&hdr->initiator_uuid, initiator_uuid); |
| uuid_copy(&hdr->target_uuid, target_uuid); |
| hdr->type = type; |
| hdr->command_id = command_id; |
| } |
| |
| static int tbnet_login_response(struct tbnet *net, u64 route, u8 sequence, |
| u32 command_id) |
| { |
| struct thunderbolt_ip_login_response reply; |
| struct tb_xdomain *xd = net->xd; |
| |
| memset(&reply, 0, sizeof(reply)); |
| tbnet_fill_header(&reply.hdr, route, sequence, xd->local_uuid, |
| xd->remote_uuid, TBIP_LOGIN_RESPONSE, sizeof(reply), |
| command_id); |
| memcpy(reply.receiver_mac, net->dev->dev_addr, ETH_ALEN); |
| reply.receiver_mac_len = ETH_ALEN; |
| |
| return tb_xdomain_response(xd, &reply, sizeof(reply), |
| TB_CFG_PKG_XDOMAIN_RESP); |
| } |
| |
| static int tbnet_login_request(struct tbnet *net, u8 sequence) |
| { |
| struct thunderbolt_ip_login_response reply; |
| struct thunderbolt_ip_login request; |
| struct tb_xdomain *xd = net->xd; |
| |
| memset(&request, 0, sizeof(request)); |
| tbnet_fill_header(&request.hdr, xd->route, sequence, xd->local_uuid, |
| xd->remote_uuid, TBIP_LOGIN, sizeof(request), |
| atomic_inc_return(&net->command_id)); |
| |
| request.proto_version = TBIP_LOGIN_PROTO_VERSION; |
| request.transmit_path = net->local_transmit_path; |
| |
| return tb_xdomain_request(xd, &request, sizeof(request), |
| TB_CFG_PKG_XDOMAIN_RESP, &reply, |
| sizeof(reply), TB_CFG_PKG_XDOMAIN_RESP, |
| TBNET_LOGIN_TIMEOUT); |
| } |
| |
| static int tbnet_logout_response(struct tbnet *net, u64 route, u8 sequence, |
| u32 command_id) |
| { |
| struct thunderbolt_ip_status reply; |
| struct tb_xdomain *xd = net->xd; |
| |
| memset(&reply, 0, sizeof(reply)); |
| tbnet_fill_header(&reply.hdr, route, sequence, xd->local_uuid, |
| xd->remote_uuid, TBIP_STATUS, sizeof(reply), |
| atomic_inc_return(&net->command_id)); |
| return tb_xdomain_response(xd, &reply, sizeof(reply), |
| TB_CFG_PKG_XDOMAIN_RESP); |
| } |
| |
| static int tbnet_logout_request(struct tbnet *net) |
| { |
| struct thunderbolt_ip_logout request; |
| struct thunderbolt_ip_status reply; |
| struct tb_xdomain *xd = net->xd; |
| |
| memset(&request, 0, sizeof(request)); |
| tbnet_fill_header(&request.hdr, xd->route, 0, xd->local_uuid, |
| xd->remote_uuid, TBIP_LOGOUT, sizeof(request), |
| atomic_inc_return(&net->command_id)); |
| |
| return tb_xdomain_request(xd, &request, sizeof(request), |
| TB_CFG_PKG_XDOMAIN_RESP, &reply, |
| sizeof(reply), TB_CFG_PKG_XDOMAIN_RESP, |
| TBNET_LOGOUT_TIMEOUT); |
| } |
| |
| static void start_login(struct tbnet *net) |
| { |
| mutex_lock(&net->connection_lock); |
| net->login_sent = false; |
| net->login_received = false; |
| mutex_unlock(&net->connection_lock); |
| |
| queue_delayed_work(system_long_wq, &net->login_work, |
| msecs_to_jiffies(1000)); |
| } |
| |
| static void stop_login(struct tbnet *net) |
| { |
| cancel_delayed_work_sync(&net->login_work); |
| cancel_work_sync(&net->connected_work); |
| } |
| |
| static inline unsigned int tbnet_frame_size(const struct tbnet_frame *tf) |
| { |
| return tf->frame.size ? : TBNET_FRAME_SIZE; |
| } |
| |
| static void tbnet_free_buffers(struct tbnet_ring *ring) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < TBNET_RING_SIZE; i++) { |
| struct device *dma_dev = tb_ring_dma_device(ring->ring); |
| struct tbnet_frame *tf = &ring->frames[i]; |
| enum dma_data_direction dir; |
| unsigned int order; |
| size_t size; |
| |
| if (!tf->page) |
| continue; |
| |
| if (ring->ring->is_tx) { |
| dir = DMA_TO_DEVICE; |
| order = 0; |
| size = TBNET_FRAME_SIZE; |
| } else { |
| dir = DMA_FROM_DEVICE; |
| order = TBNET_RX_PAGE_ORDER; |
| size = TBNET_RX_PAGE_SIZE; |
| } |
| |
| if (tf->frame.buffer_phy) |
| dma_unmap_page(dma_dev, tf->frame.buffer_phy, size, |
| dir); |
| |
| __free_pages(tf->page, order); |
| tf->page = NULL; |
| } |
| |
| ring->cons = 0; |
| ring->prod = 0; |
| } |
| |
| static void tbnet_tear_down(struct tbnet *net, bool send_logout) |
| { |
| netif_carrier_off(net->dev); |
| netif_stop_queue(net->dev); |
| |
| stop_login(net); |
| |
| mutex_lock(&net->connection_lock); |
| |
| if (net->login_sent && net->login_received) { |
| int ret, retries = TBNET_LOGOUT_RETRIES; |
| |
| while (send_logout && retries-- > 0) { |
| ret = tbnet_logout_request(net); |
| if (ret != -ETIMEDOUT) |
| break; |
| } |
| |
| tb_ring_stop(net->rx_ring.ring); |
| tb_ring_stop(net->tx_ring.ring); |
| tbnet_free_buffers(&net->rx_ring); |
| tbnet_free_buffers(&net->tx_ring); |
| |
| ret = tb_xdomain_disable_paths(net->xd, |
| net->local_transmit_path, |
| net->rx_ring.ring->hop, |
| net->remote_transmit_path, |
| net->tx_ring.ring->hop); |
| if (ret) |
| netdev_warn(net->dev, "failed to disable DMA paths\n"); |
| |
| tb_xdomain_release_in_hopid(net->xd, net->remote_transmit_path); |
| net->remote_transmit_path = 0; |
| } |
| |
| net->login_retries = 0; |
| net->login_sent = false; |
| net->login_received = false; |
| |
| mutex_unlock(&net->connection_lock); |
| } |
| |
| static int tbnet_handle_packet(const void *buf, size_t size, void *data) |
| { |
| const struct thunderbolt_ip_login *pkg = buf; |
| struct tbnet *net = data; |
| u32 command_id; |
| int ret = 0; |
| u32 sequence; |
| u64 route; |
| |
| /* Make sure the packet is for us */ |
| if (size < sizeof(struct thunderbolt_ip_header)) |
| return 0; |
| if (!uuid_equal(&pkg->hdr.initiator_uuid, net->xd->remote_uuid)) |
| return 0; |
| if (!uuid_equal(&pkg->hdr.target_uuid, net->xd->local_uuid)) |
| return 0; |
| |
| route = ((u64)pkg->hdr.route_hi << 32) | pkg->hdr.route_lo; |
| route &= ~BIT_ULL(63); |
| if (route != net->xd->route) |
| return 0; |
| |
| sequence = pkg->hdr.length_sn & TBIP_HDR_SN_MASK; |
| sequence >>= TBIP_HDR_SN_SHIFT; |
| command_id = pkg->hdr.command_id; |
| |
| switch (pkg->hdr.type) { |
| case TBIP_LOGIN: |
| if (!netif_running(net->dev)) |
| break; |
| |
| ret = tbnet_login_response(net, route, sequence, |
| pkg->hdr.command_id); |
| if (!ret) { |
| mutex_lock(&net->connection_lock); |
| net->login_received = true; |
| net->remote_transmit_path = pkg->transmit_path; |
| |
| /* If we reached the number of max retries or |
| * previous logout, schedule another round of |
| * login retries |
| */ |
| if (net->login_retries >= TBNET_LOGIN_RETRIES || |
| !net->login_sent) { |
| net->login_retries = 0; |
| queue_delayed_work(system_long_wq, |
| &net->login_work, 0); |
| } |
| mutex_unlock(&net->connection_lock); |
| |
| queue_work(system_long_wq, &net->connected_work); |
| } |
| break; |
| |
| case TBIP_LOGOUT: |
| ret = tbnet_logout_response(net, route, sequence, command_id); |
| if (!ret) |
| queue_work(system_long_wq, &net->disconnect_work); |
| break; |
| |
| default: |
| return 0; |
| } |
| |
| if (ret) |
| netdev_warn(net->dev, "failed to send ThunderboltIP response\n"); |
| |
| return 1; |
| } |
| |
| static unsigned int tbnet_available_buffers(const struct tbnet_ring *ring) |
| { |
| return ring->prod - ring->cons; |
| } |
| |
| static int tbnet_alloc_rx_buffers(struct tbnet *net, unsigned int nbuffers) |
| { |
| struct tbnet_ring *ring = &net->rx_ring; |
| int ret; |
| |
| while (nbuffers--) { |
| struct device *dma_dev = tb_ring_dma_device(ring->ring); |
| unsigned int index = ring->prod & (TBNET_RING_SIZE - 1); |
| struct tbnet_frame *tf = &ring->frames[index]; |
| dma_addr_t dma_addr; |
| |
| if (tf->page) |
| break; |
| |
| /* Allocate page (order > 0) so that it can hold maximum |
| * ThunderboltIP frame (4kB) and the additional room for |
| * SKB shared info required by build_skb(). |
| */ |
| tf->page = dev_alloc_pages(TBNET_RX_PAGE_ORDER); |
| if (!tf->page) { |
| ret = -ENOMEM; |
| goto err_free; |
| } |
| |
| dma_addr = dma_map_page(dma_dev, tf->page, 0, |
| TBNET_RX_PAGE_SIZE, DMA_FROM_DEVICE); |
| if (dma_mapping_error(dma_dev, dma_addr)) { |
| ret = -ENOMEM; |
| goto err_free; |
| } |
| |
| tf->frame.buffer_phy = dma_addr; |
| tf->dev = net->dev; |
| |
| tb_ring_rx(ring->ring, &tf->frame); |
| |
| ring->prod++; |
| } |
| |
| return 0; |
| |
| err_free: |
| tbnet_free_buffers(ring); |
| return ret; |
| } |
| |
| static struct tbnet_frame *tbnet_get_tx_buffer(struct tbnet *net) |
| { |
| struct tbnet_ring *ring = &net->tx_ring; |
| struct device *dma_dev = tb_ring_dma_device(ring->ring); |
| struct tbnet_frame *tf; |
| unsigned int index; |
| |
| if (!tbnet_available_buffers(ring)) |
| return NULL; |
| |
| index = ring->cons++ & (TBNET_RING_SIZE - 1); |
| |
| tf = &ring->frames[index]; |
| tf->frame.size = 0; |
| |
| dma_sync_single_for_cpu(dma_dev, tf->frame.buffer_phy, |
| tbnet_frame_size(tf), DMA_TO_DEVICE); |
| |
| return tf; |
| } |
| |
| static void tbnet_tx_callback(struct tb_ring *ring, struct ring_frame *frame, |
| bool canceled) |
| { |
| struct tbnet_frame *tf = container_of(frame, typeof(*tf), frame); |
| struct tbnet *net = netdev_priv(tf->dev); |
| |
| /* Return buffer to the ring */ |
| net->tx_ring.prod++; |
| |
| if (tbnet_available_buffers(&net->tx_ring) >= TBNET_RING_SIZE / 2) |
| netif_wake_queue(net->dev); |
| } |
| |
| static int tbnet_alloc_tx_buffers(struct tbnet *net) |
| { |
| struct tbnet_ring *ring = &net->tx_ring; |
| struct device *dma_dev = tb_ring_dma_device(ring->ring); |
| unsigned int i; |
| |
| for (i = 0; i < TBNET_RING_SIZE; i++) { |
| struct tbnet_frame *tf = &ring->frames[i]; |
| dma_addr_t dma_addr; |
| |
| tf->page = alloc_page(GFP_KERNEL); |
| if (!tf->page) { |
| tbnet_free_buffers(ring); |
| return -ENOMEM; |
| } |
| |
| dma_addr = dma_map_page(dma_dev, tf->page, 0, TBNET_FRAME_SIZE, |
| DMA_TO_DEVICE); |
| if (dma_mapping_error(dma_dev, dma_addr)) { |
| __free_page(tf->page); |
| tf->page = NULL; |
| tbnet_free_buffers(ring); |
| return -ENOMEM; |
| } |
| |
| tf->dev = net->dev; |
| tf->frame.buffer_phy = dma_addr; |
| tf->frame.callback = tbnet_tx_callback; |
| tf->frame.sof = TBIP_PDF_FRAME_START; |
| tf->frame.eof = TBIP_PDF_FRAME_END; |
| } |
| |
| ring->cons = 0; |
| ring->prod = TBNET_RING_SIZE - 1; |
| |
| return 0; |
| } |
| |
| static void tbnet_connected_work(struct work_struct *work) |
| { |
| struct tbnet *net = container_of(work, typeof(*net), connected_work); |
| bool connected; |
| int ret; |
| |
| if (netif_carrier_ok(net->dev)) |
| return; |
| |
| mutex_lock(&net->connection_lock); |
| connected = net->login_sent && net->login_received; |
| mutex_unlock(&net->connection_lock); |
| |
| if (!connected) |
| return; |
| |
| ret = tb_xdomain_alloc_in_hopid(net->xd, net->remote_transmit_path); |
| if (ret != net->remote_transmit_path) { |
| netdev_err(net->dev, "failed to allocate Rx HopID\n"); |
| return; |
| } |
| |
| /* Both logins successful so enable the rings, high-speed DMA |
| * paths and start the network device queue. |
| * |
| * Note we enable the DMA paths last to make sure we have primed |
| * the Rx ring before any incoming packets are allowed to |
| * arrive. |
| */ |
| tb_ring_start(net->tx_ring.ring); |
| tb_ring_start(net->rx_ring.ring); |
| |
| ret = tbnet_alloc_rx_buffers(net, TBNET_RING_SIZE); |
| if (ret) |
| goto err_stop_rings; |
| |
| ret = tbnet_alloc_tx_buffers(net); |
| if (ret) |
| goto err_free_rx_buffers; |
| |
| ret = tb_xdomain_enable_paths(net->xd, net->local_transmit_path, |
| net->rx_ring.ring->hop, |
| net->remote_transmit_path, |
| net->tx_ring.ring->hop); |
| if (ret) { |
| netdev_err(net->dev, "failed to enable DMA paths\n"); |
| goto err_free_tx_buffers; |
| } |
| |
| netif_carrier_on(net->dev); |
| netif_start_queue(net->dev); |
| return; |
| |
| err_free_tx_buffers: |
| tbnet_free_buffers(&net->tx_ring); |
| err_free_rx_buffers: |
| tbnet_free_buffers(&net->rx_ring); |
| err_stop_rings: |
| tb_ring_stop(net->rx_ring.ring); |
| tb_ring_stop(net->tx_ring.ring); |
| tb_xdomain_release_in_hopid(net->xd, net->remote_transmit_path); |
| } |
| |
| static void tbnet_login_work(struct work_struct *work) |
| { |
| struct tbnet *net = container_of(work, typeof(*net), login_work.work); |
| unsigned long delay = msecs_to_jiffies(TBNET_LOGIN_DELAY); |
| int ret; |
| |
| if (netif_carrier_ok(net->dev)) |
| return; |
| |
| ret = tbnet_login_request(net, net->login_retries % 4); |
| if (ret) { |
| if (net->login_retries++ < TBNET_LOGIN_RETRIES) { |
| queue_delayed_work(system_long_wq, &net->login_work, |
| delay); |
| } else { |
| netdev_info(net->dev, "ThunderboltIP login timed out\n"); |
| } |
| } else { |
| net->login_retries = 0; |
| |
| mutex_lock(&net->connection_lock); |
| net->login_sent = true; |
| mutex_unlock(&net->connection_lock); |
| |
| queue_work(system_long_wq, &net->connected_work); |
| } |
| } |
| |
| static void tbnet_disconnect_work(struct work_struct *work) |
| { |
| struct tbnet *net = container_of(work, typeof(*net), disconnect_work); |
| |
| tbnet_tear_down(net, false); |
| } |
| |
| static bool tbnet_check_frame(struct tbnet *net, const struct tbnet_frame *tf, |
| const struct thunderbolt_ip_frame_header *hdr) |
| { |
| u32 frame_id, frame_count, frame_size, frame_index; |
| unsigned int size; |
| |
| if (tf->frame.flags & RING_DESC_CRC_ERROR) { |
| net->stats.rx_crc_errors++; |
| return false; |
| } else if (tf->frame.flags & RING_DESC_BUFFER_OVERRUN) { |
| net->stats.rx_over_errors++; |
| return false; |
| } |
| |
| /* Should be greater than just header i.e. contains data */ |
| size = tbnet_frame_size(tf); |
| if (size <= sizeof(*hdr)) { |
| net->stats.rx_length_errors++; |
| return false; |
| } |
| |
| frame_count = le32_to_cpu(hdr->frame_count); |
| frame_size = le32_to_cpu(hdr->frame_size); |
| frame_index = le16_to_cpu(hdr->frame_index); |
| frame_id = le16_to_cpu(hdr->frame_id); |
| |
| if ((frame_size > size - sizeof(*hdr)) || !frame_size) { |
| net->stats.rx_length_errors++; |
| return false; |
| } |
| |
| /* In case we're in the middle of packet, validate the frame |
| * header based on first fragment of the packet. |
| */ |
| if (net->skb && net->rx_hdr.frame_count) { |
| /* Check the frame count fits the count field */ |
| if (frame_count != net->rx_hdr.frame_count) { |
| net->stats.rx_length_errors++; |
| return false; |
| } |
| |
| /* Check the frame identifiers are incremented correctly, |
| * and id is matching. |
| */ |
| if (frame_index != net->rx_hdr.frame_index + 1 || |
| frame_id != net->rx_hdr.frame_id) { |
| net->stats.rx_missed_errors++; |
| return false; |
| } |
| |
| if (net->skb->len + frame_size > TBNET_MAX_MTU) { |
| net->stats.rx_length_errors++; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* Start of packet, validate the frame header */ |
| if (frame_count == 0 || frame_count > TBNET_RING_SIZE / 4) { |
| net->stats.rx_length_errors++; |
| return false; |
| } |
| if (frame_index != 0) { |
| net->stats.rx_missed_errors++; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static int tbnet_poll(struct napi_struct *napi, int budget) |
| { |
| struct tbnet *net = container_of(napi, struct tbnet, napi); |
| unsigned int cleaned_count = tbnet_available_buffers(&net->rx_ring); |
| struct device *dma_dev = tb_ring_dma_device(net->rx_ring.ring); |
| unsigned int rx_packets = 0; |
| |
| while (rx_packets < budget) { |
| const struct thunderbolt_ip_frame_header *hdr; |
| unsigned int hdr_size = sizeof(*hdr); |
| struct sk_buff *skb = NULL; |
| struct ring_frame *frame; |
| struct tbnet_frame *tf; |
| struct page *page; |
| bool last = true; |
| u32 frame_size; |
| |
| /* Return some buffers to hardware, one at a time is too |
| * slow so allocate MAX_SKB_FRAGS buffers at the same |
| * time. |
| */ |
| if (cleaned_count >= MAX_SKB_FRAGS) { |
| tbnet_alloc_rx_buffers(net, cleaned_count); |
| cleaned_count = 0; |
| } |
| |
| frame = tb_ring_poll(net->rx_ring.ring); |
| if (!frame) |
| break; |
| |
| dma_unmap_page(dma_dev, frame->buffer_phy, |
| TBNET_RX_PAGE_SIZE, DMA_FROM_DEVICE); |
| |
| tf = container_of(frame, typeof(*tf), frame); |
| |
| page = tf->page; |
| tf->page = NULL; |
| net->rx_ring.cons++; |
| cleaned_count++; |
| |
| hdr = page_address(page); |
| if (!tbnet_check_frame(net, tf, hdr)) { |
| __free_pages(page, TBNET_RX_PAGE_ORDER); |
| dev_kfree_skb_any(net->skb); |
| net->skb = NULL; |
| continue; |
| } |
| |
| frame_size = le32_to_cpu(hdr->frame_size); |
| |
| skb = net->skb; |
| if (!skb) { |
| skb = build_skb(page_address(page), |
| TBNET_RX_PAGE_SIZE); |
| if (!skb) { |
| __free_pages(page, TBNET_RX_PAGE_ORDER); |
| net->stats.rx_errors++; |
| break; |
| } |
| |
| skb_reserve(skb, hdr_size); |
| skb_put(skb, frame_size); |
| |
| net->skb = skb; |
| } else { |
| skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, |
| page, hdr_size, frame_size, |
| TBNET_RX_PAGE_SIZE - hdr_size); |
| } |
| |
| net->rx_hdr.frame_size = frame_size; |
| net->rx_hdr.frame_count = le32_to_cpu(hdr->frame_count); |
| net->rx_hdr.frame_index = le16_to_cpu(hdr->frame_index); |
| net->rx_hdr.frame_id = le16_to_cpu(hdr->frame_id); |
| last = net->rx_hdr.frame_index == net->rx_hdr.frame_count - 1; |
| |
| rx_packets++; |
| net->stats.rx_bytes += frame_size; |
| |
| if (last) { |
| skb->protocol = eth_type_trans(skb, net->dev); |
| napi_gro_receive(&net->napi, skb); |
| net->skb = NULL; |
| } |
| } |
| |
| net->stats.rx_packets += rx_packets; |
| |
| if (cleaned_count) |
| tbnet_alloc_rx_buffers(net, cleaned_count); |
| |
| if (rx_packets >= budget) |
| return budget; |
| |
| napi_complete_done(napi, rx_packets); |
| /* Re-enable the ring interrupt */ |
| tb_ring_poll_complete(net->rx_ring.ring); |
| |
| return rx_packets; |
| } |
| |
| static void tbnet_start_poll(void *data) |
| { |
| struct tbnet *net = data; |
| |
| napi_schedule(&net->napi); |
| } |
| |
| static int tbnet_open(struct net_device *dev) |
| { |
| struct tbnet *net = netdev_priv(dev); |
| struct tb_xdomain *xd = net->xd; |
| u16 sof_mask, eof_mask; |
| struct tb_ring *ring; |
| int hopid; |
| |
| netif_carrier_off(dev); |
| |
| ring = tb_ring_alloc_tx(xd->tb->nhi, -1, TBNET_RING_SIZE, |
| RING_FLAG_FRAME); |
| if (!ring) { |
| netdev_err(dev, "failed to allocate Tx ring\n"); |
| return -ENOMEM; |
| } |
| net->tx_ring.ring = ring; |
| |
| hopid = tb_xdomain_alloc_out_hopid(xd, -1); |
| if (hopid < 0) { |
| netdev_err(dev, "failed to allocate Tx HopID\n"); |
| tb_ring_free(net->tx_ring.ring); |
| net->tx_ring.ring = NULL; |
| return hopid; |
| } |
| net->local_transmit_path = hopid; |
| |
| sof_mask = BIT(TBIP_PDF_FRAME_START); |
| eof_mask = BIT(TBIP_PDF_FRAME_END); |
| |
| ring = tb_ring_alloc_rx(xd->tb->nhi, -1, TBNET_RING_SIZE, |
| RING_FLAG_FRAME, 0, sof_mask, eof_mask, |
| tbnet_start_poll, net); |
| if (!ring) { |
| netdev_err(dev, "failed to allocate Rx ring\n"); |
| tb_xdomain_release_out_hopid(xd, hopid); |
| tb_ring_free(net->tx_ring.ring); |
| net->tx_ring.ring = NULL; |
| return -ENOMEM; |
| } |
| net->rx_ring.ring = ring; |
| |
| napi_enable(&net->napi); |
| start_login(net); |
| |
| return 0; |
| } |
| |
| static int tbnet_stop(struct net_device *dev) |
| { |
| struct tbnet *net = netdev_priv(dev); |
| |
| napi_disable(&net->napi); |
| |
| cancel_work_sync(&net->disconnect_work); |
| tbnet_tear_down(net, true); |
| |
| tb_ring_free(net->rx_ring.ring); |
| net->rx_ring.ring = NULL; |
| |
| tb_xdomain_release_out_hopid(net->xd, net->local_transmit_path); |
| tb_ring_free(net->tx_ring.ring); |
| net->tx_ring.ring = NULL; |
| |
| return 0; |
| } |
| |
| static bool tbnet_xmit_csum_and_map(struct tbnet *net, struct sk_buff *skb, |
| struct tbnet_frame **frames, u32 frame_count) |
| { |
| struct thunderbolt_ip_frame_header *hdr = page_address(frames[0]->page); |
| struct device *dma_dev = tb_ring_dma_device(net->tx_ring.ring); |
| __wsum wsum = htonl(skb->len - skb_transport_offset(skb)); |
| unsigned int i, len, offset = skb_transport_offset(skb); |
| __be16 protocol = skb->protocol; |
| void *data = skb->data; |
| void *dest = hdr + 1; |
| __sum16 *tucso; |
| |
| if (skb->ip_summed != CHECKSUM_PARTIAL) { |
| /* No need to calculate checksum so we just update the |
| * total frame count and sync the frames for DMA. |
| */ |
| for (i = 0; i < frame_count; i++) { |
| hdr = page_address(frames[i]->page); |
| hdr->frame_count = cpu_to_le32(frame_count); |
| dma_sync_single_for_device(dma_dev, |
| frames[i]->frame.buffer_phy, |
| tbnet_frame_size(frames[i]), DMA_TO_DEVICE); |
| } |
| |
| return true; |
| } |
| |
| if (protocol == htons(ETH_P_8021Q)) { |
| struct vlan_hdr *vhdr, vh; |
| |
| vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(vh), &vh); |
| if (!vhdr) |
| return false; |
| |
| protocol = vhdr->h_vlan_encapsulated_proto; |
| } |
| |
| /* Data points on the beginning of packet. |
| * Check is the checksum absolute place in the packet. |
| * ipcso will update IP checksum. |
| * tucso will update TCP/UPD checksum. |
| */ |
| if (protocol == htons(ETH_P_IP)) { |
| __sum16 *ipcso = dest + ((void *)&(ip_hdr(skb)->check) - data); |
| |
| *ipcso = 0; |
| *ipcso = ip_fast_csum(dest + skb_network_offset(skb), |
| ip_hdr(skb)->ihl); |
| |
| if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
| tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data); |
| else if (ip_hdr(skb)->protocol == IPPROTO_UDP) |
| tucso = dest + ((void *)&(udp_hdr(skb)->check) - data); |
| else |
| return false; |
| |
| *tucso = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, |
| ip_hdr(skb)->daddr, 0, |
| ip_hdr(skb)->protocol, 0); |
| } else if (skb_is_gso(skb) && skb_is_gso_v6(skb)) { |
| tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data); |
| *tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
| &ipv6_hdr(skb)->daddr, 0, |
| IPPROTO_TCP, 0); |
| } else if (protocol == htons(ETH_P_IPV6)) { |
| tucso = dest + skb_checksum_start_offset(skb) + skb->csum_offset; |
| *tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
| &ipv6_hdr(skb)->daddr, 0, |
| ipv6_hdr(skb)->nexthdr, 0); |
| } else { |
| return false; |
| } |
| |
| /* First frame was headers, rest of the frames contain data. |
| * Calculate checksum over each frame. |
| */ |
| for (i = 0; i < frame_count; i++) { |
| hdr = page_address(frames[i]->page); |
| dest = (void *)(hdr + 1) + offset; |
| len = le32_to_cpu(hdr->frame_size) - offset; |
| wsum = csum_partial(dest, len, wsum); |
| hdr->frame_count = cpu_to_le32(frame_count); |
| |
| offset = 0; |
| } |
| |
| *tucso = csum_fold(wsum); |
| |
| /* Checksum is finally calculated and we don't touch the memory |
| * anymore, so DMA sync the frames now. |
| */ |
| for (i = 0; i < frame_count; i++) { |
| dma_sync_single_for_device(dma_dev, frames[i]->frame.buffer_phy, |
| tbnet_frame_size(frames[i]), DMA_TO_DEVICE); |
| } |
| |
| return true; |
| } |
| |
| static void *tbnet_kmap_frag(struct sk_buff *skb, unsigned int frag_num, |
| unsigned int *len) |
| { |
| const skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_num]; |
| |
| *len = skb_frag_size(frag); |
| return kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag); |
| } |
| |
| static netdev_tx_t tbnet_start_xmit(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| struct tbnet *net = netdev_priv(dev); |
| struct tbnet_frame *frames[MAX_SKB_FRAGS]; |
| u16 frame_id = atomic_read(&net->frame_id); |
| struct thunderbolt_ip_frame_header *hdr; |
| unsigned int len = skb_headlen(skb); |
| unsigned int data_len = skb->len; |
| unsigned int nframes, i; |
| unsigned int frag = 0; |
| void *src = skb->data; |
| u32 frame_index = 0; |
| bool unmap = false; |
| void *dest; |
| |
| nframes = DIV_ROUND_UP(data_len, TBNET_MAX_PAYLOAD_SIZE); |
| if (tbnet_available_buffers(&net->tx_ring) < nframes) { |
| netif_stop_queue(net->dev); |
| return NETDEV_TX_BUSY; |
| } |
| |
| frames[frame_index] = tbnet_get_tx_buffer(net); |
| if (!frames[frame_index]) |
| goto err_drop; |
| |
| hdr = page_address(frames[frame_index]->page); |
| dest = hdr + 1; |
| |
| /* If overall packet is bigger than the frame data size */ |
| while (data_len > TBNET_MAX_PAYLOAD_SIZE) { |
| unsigned int size_left = TBNET_MAX_PAYLOAD_SIZE; |
| |
| hdr->frame_size = cpu_to_le32(TBNET_MAX_PAYLOAD_SIZE); |
| hdr->frame_index = cpu_to_le16(frame_index); |
| hdr->frame_id = cpu_to_le16(frame_id); |
| |
| do { |
| if (len > size_left) { |
| /* Copy data onto Tx buffer data with |
| * full frame size then break and go to |
| * next frame |
| */ |
| memcpy(dest, src, size_left); |
| len -= size_left; |
| dest += size_left; |
| src += size_left; |
| break; |
| } |
| |
| memcpy(dest, src, len); |
| size_left -= len; |
| dest += len; |
| |
| if (unmap) { |
| kunmap_atomic(src); |
| unmap = false; |
| } |
| |
| /* Ensure all fragments have been processed */ |
| if (frag < skb_shinfo(skb)->nr_frags) { |
| /* Map and then unmap quickly */ |
| src = tbnet_kmap_frag(skb, frag++, &len); |
| unmap = true; |
| } else if (unlikely(size_left > 0)) { |
| goto err_drop; |
| } |
| } while (size_left > 0); |
| |
| data_len -= TBNET_MAX_PAYLOAD_SIZE; |
| frame_index++; |
| |
| frames[frame_index] = tbnet_get_tx_buffer(net); |
| if (!frames[frame_index]) |
| goto err_drop; |
| |
| hdr = page_address(frames[frame_index]->page); |
| dest = hdr + 1; |
| } |
| |
| hdr->frame_size = cpu_to_le32(data_len); |
| hdr->frame_index = cpu_to_le16(frame_index); |
| hdr->frame_id = cpu_to_le16(frame_id); |
| |
| frames[frame_index]->frame.size = data_len + sizeof(*hdr); |
| |
| /* In case the remaining data_len is smaller than a frame */ |
| while (len < data_len) { |
| memcpy(dest, src, len); |
| data_len -= len; |
| dest += len; |
| |
| if (unmap) { |
| kunmap_atomic(src); |
| unmap = false; |
| } |
| |
| if (frag < skb_shinfo(skb)->nr_frags) { |
| src = tbnet_kmap_frag(skb, frag++, &len); |
| unmap = true; |
| } else if (unlikely(data_len > 0)) { |
| goto err_drop; |
| } |
| } |
| |
| memcpy(dest, src, data_len); |
| |
| if (unmap) |
| kunmap_atomic(src); |
| |
| if (!tbnet_xmit_csum_and_map(net, skb, frames, frame_index + 1)) |
| goto err_drop; |
| |
| for (i = 0; i < frame_index + 1; i++) |
| tb_ring_tx(net->tx_ring.ring, &frames[i]->frame); |
| |
| if (net->svc->prtcstns & TBNET_MATCH_FRAGS_ID) |
| atomic_inc(&net->frame_id); |
| |
| net->stats.tx_packets++; |
| net->stats.tx_bytes += skb->len; |
| |
| dev_consume_skb_any(skb); |
| |
| return NETDEV_TX_OK; |
| |
| err_drop: |
| /* We can re-use the buffers */ |
| net->tx_ring.cons -= frame_index; |
| |
| dev_kfree_skb_any(skb); |
| net->stats.tx_errors++; |
| |
| return NETDEV_TX_OK; |
| } |
| |
| static void tbnet_get_stats64(struct net_device *dev, |
| struct rtnl_link_stats64 *stats) |
| { |
| struct tbnet *net = netdev_priv(dev); |
| |
| stats->tx_packets = net->stats.tx_packets; |
| stats->rx_packets = net->stats.rx_packets; |
| stats->tx_bytes = net->stats.tx_bytes; |
| stats->rx_bytes = net->stats.rx_bytes; |
| stats->rx_errors = net->stats.rx_errors + net->stats.rx_length_errors + |
| net->stats.rx_over_errors + net->stats.rx_crc_errors + |
| net->stats.rx_missed_errors; |
| stats->tx_errors = net->stats.tx_errors; |
| stats->rx_length_errors = net->stats.rx_length_errors; |
| stats->rx_over_errors = net->stats.rx_over_errors; |
| stats->rx_crc_errors = net->stats.rx_crc_errors; |
| stats->rx_missed_errors = net->stats.rx_missed_errors; |
| } |
| |
| static const struct net_device_ops tbnet_netdev_ops = { |
| .ndo_open = tbnet_open, |
| .ndo_stop = tbnet_stop, |
| .ndo_start_xmit = tbnet_start_xmit, |
| .ndo_get_stats64 = tbnet_get_stats64, |
| }; |
| |
| static void tbnet_generate_mac(struct net_device *dev) |
| { |
| const struct tbnet *net = netdev_priv(dev); |
| const struct tb_xdomain *xd = net->xd; |
| u8 phy_port; |
| u32 hash; |
| |
| phy_port = tb_phy_port_from_link(TBNET_L0_PORT_NUM(xd->route)); |
| |
| /* Unicast and locally administered MAC */ |
| dev->dev_addr[0] = phy_port << 4 | 0x02; |
| hash = jhash2((u32 *)xd->local_uuid, 4, 0); |
| memcpy(dev->dev_addr + 1, &hash, sizeof(hash)); |
| hash = jhash2((u32 *)xd->local_uuid, 4, hash); |
| dev->dev_addr[5] = hash & 0xff; |
| } |
| |
| static int tbnet_probe(struct tb_service *svc, const struct tb_service_id *id) |
| { |
| struct tb_xdomain *xd = tb_service_parent(svc); |
| struct net_device *dev; |
| struct tbnet *net; |
| int ret; |
| |
| dev = alloc_etherdev(sizeof(*net)); |
| if (!dev) |
| return -ENOMEM; |
| |
| SET_NETDEV_DEV(dev, &svc->dev); |
| |
| net = netdev_priv(dev); |
| INIT_DELAYED_WORK(&net->login_work, tbnet_login_work); |
| INIT_WORK(&net->connected_work, tbnet_connected_work); |
| INIT_WORK(&net->disconnect_work, tbnet_disconnect_work); |
| mutex_init(&net->connection_lock); |
| atomic_set(&net->command_id, 0); |
| atomic_set(&net->frame_id, 0); |
| net->svc = svc; |
| net->dev = dev; |
| net->xd = xd; |
| |
| tbnet_generate_mac(dev); |
| |
| strcpy(dev->name, "thunderbolt%d"); |
| dev->netdev_ops = &tbnet_netdev_ops; |
| |
| /* ThunderboltIP takes advantage of TSO packets but instead of |
| * segmenting them we just split the packet into Thunderbolt |
| * frames (maximum payload size of each frame is 4084 bytes) and |
| * calculate checksum over the whole packet here. |
| * |
| * The receiving side does the opposite if the host OS supports |
| * LRO, otherwise it needs to split the large packet into MTU |
| * sized smaller packets. |
| * |
| * In order to receive large packets from the networking stack, |
| * we need to announce support for most of the offloading |
| * features here. |
| */ |
| dev->hw_features = NETIF_F_SG | NETIF_F_ALL_TSO | NETIF_F_GRO | |
| NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; |
| dev->features = dev->hw_features | NETIF_F_HIGHDMA; |
| dev->hard_header_len += sizeof(struct thunderbolt_ip_frame_header); |
| |
| netif_napi_add(dev, &net->napi, tbnet_poll, NAPI_POLL_WEIGHT); |
| |
| /* MTU range: 68 - 65522 */ |
| dev->min_mtu = ETH_MIN_MTU; |
| dev->max_mtu = TBNET_MAX_MTU - ETH_HLEN; |
| |
| net->handler.uuid = &tbnet_svc_uuid; |
| net->handler.callback = tbnet_handle_packet; |
| net->handler.data = net; |
| tb_register_protocol_handler(&net->handler); |
| |
| tb_service_set_drvdata(svc, net); |
| |
| ret = register_netdev(dev); |
| if (ret) { |
| tb_unregister_protocol_handler(&net->handler); |
| free_netdev(dev); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void tbnet_remove(struct tb_service *svc) |
| { |
| struct tbnet *net = tb_service_get_drvdata(svc); |
| |
| unregister_netdev(net->dev); |
| tb_unregister_protocol_handler(&net->handler); |
| free_netdev(net->dev); |
| } |
| |
| static void tbnet_shutdown(struct tb_service *svc) |
| { |
| tbnet_tear_down(tb_service_get_drvdata(svc), true); |
| } |
| |
| static int __maybe_unused tbnet_suspend(struct device *dev) |
| { |
| struct tb_service *svc = tb_to_service(dev); |
| struct tbnet *net = tb_service_get_drvdata(svc); |
| |
| stop_login(net); |
| if (netif_running(net->dev)) { |
| netif_device_detach(net->dev); |
| tbnet_tear_down(net, true); |
| } |
| |
| tb_unregister_protocol_handler(&net->handler); |
| return 0; |
| } |
| |
| static int __maybe_unused tbnet_resume(struct device *dev) |
| { |
| struct tb_service *svc = tb_to_service(dev); |
| struct tbnet *net = tb_service_get_drvdata(svc); |
| |
| tb_register_protocol_handler(&net->handler); |
| |
| netif_carrier_off(net->dev); |
| if (netif_running(net->dev)) { |
| netif_device_attach(net->dev); |
| start_login(net); |
| } |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops tbnet_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(tbnet_suspend, tbnet_resume) |
| }; |
| |
| static const struct tb_service_id tbnet_ids[] = { |
| { TB_SERVICE("network", 1) }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(tbsvc, tbnet_ids); |
| |
| static struct tb_service_driver tbnet_driver = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "thunderbolt-net", |
| .pm = &tbnet_pm_ops, |
| }, |
| .probe = tbnet_probe, |
| .remove = tbnet_remove, |
| .shutdown = tbnet_shutdown, |
| .id_table = tbnet_ids, |
| }; |
| |
| static int __init tbnet_init(void) |
| { |
| int ret; |
| |
| tbnet_dir = tb_property_create_dir(&tbnet_dir_uuid); |
| if (!tbnet_dir) |
| return -ENOMEM; |
| |
| tb_property_add_immediate(tbnet_dir, "prtcid", 1); |
| tb_property_add_immediate(tbnet_dir, "prtcvers", 1); |
| tb_property_add_immediate(tbnet_dir, "prtcrevs", 1); |
| /* Currently only announce support for match frags ID (bit 1). Bit 0 |
| * is reserved for full E2E flow control which we do not support at |
| * the moment. |
| */ |
| tb_property_add_immediate(tbnet_dir, "prtcstns", |
| TBNET_MATCH_FRAGS_ID | TBNET_64K_FRAMES); |
| |
| ret = tb_register_property_dir("network", tbnet_dir); |
| if (ret) |
| goto err_free_dir; |
| |
| ret = tb_register_service_driver(&tbnet_driver); |
| if (ret) |
| goto err_unregister; |
| |
| return 0; |
| |
| err_unregister: |
| tb_unregister_property_dir("network", tbnet_dir); |
| err_free_dir: |
| tb_property_free_dir(tbnet_dir); |
| |
| return ret; |
| } |
| module_init(tbnet_init); |
| |
| static void __exit tbnet_exit(void) |
| { |
| tb_unregister_service_driver(&tbnet_driver); |
| tb_unregister_property_dir("network", tbnet_dir); |
| tb_property_free_dir(tbnet_dir); |
| } |
| module_exit(tbnet_exit); |
| |
| MODULE_AUTHOR("Amir Levy <amir.jer.levy@intel.com>"); |
| MODULE_AUTHOR("Michael Jamet <michael.jamet@intel.com>"); |
| MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); |
| MODULE_DESCRIPTION("Thunderbolt network driver"); |
| MODULE_LICENSE("GPL v2"); |