2018-08-28 16:58:43 +00:00
|
|
|
// SPDX-License-Identifier: GPL-2.0
|
2017-10-02 10:38:45 +00:00
|
|
|
/*
|
|
|
|
* 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
|
2021-01-08 14:33:03 +00:00
|
|
|
#define TBNET_LOGOUT_TIMEOUT 1000
|
2017-10-02 10:38:45 +00:00
|
|
|
|
|
|
|
#define TBNET_RING_SIZE 256
|
|
|
|
#define TBNET_LOGIN_RETRIES 60
|
2021-01-08 14:33:03 +00:00
|
|
|
#define TBNET_LOGOUT_RETRIES 10
|
2017-10-02 10:38:45 +00:00
|
|
|
#define TBNET_MATCH_FRAGS_ID BIT(1)
|
2021-01-08 14:33:03 +00:00
|
|
|
#define TBNET_64K_FRAMES BIT(2)
|
2017-10-02 10:38:45 +00:00
|
|
|
#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
|
2021-01-08 14:25:39 +00:00
|
|
|
* @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
|
2017-10-02 10:38:45 +00:00
|
|
|
* @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
|
2018-02-12 14:10:20 +00:00
|
|
|
* @disconnect_work: Worker that handles tearing down the ThunderboltIP
|
|
|
|
* connection
|
2017-10-02 10:38:45 +00:00
|
|
|
* @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;
|
2021-01-08 14:25:39 +00:00
|
|
|
int local_transmit_path;
|
|
|
|
int remote_transmit_path;
|
2017-10-02 10:38:45 +00:00
|
|
|
struct mutex connection_lock;
|
|
|
|
int login_retries;
|
|
|
|
struct delayed_work login_work;
|
|
|
|
struct work_struct connected_work;
|
2018-02-12 14:10:20 +00:00
|
|
|
struct work_struct disconnect_work;
|
2017-10-02 10:38:45 +00:00
|
|
|
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;
|
2021-01-08 14:25:39 +00:00
|
|
|
request.transmit_path = net->local_transmit_path;
|
2017-10-02 10:38:45 +00:00
|
|
|
|
|
|
|
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;
|
2017-11-24 11:05:36 +00:00
|
|
|
size = TBNET_FRAME_SIZE;
|
2017-10-02 10:38:45 +00:00
|
|
|
} 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) {
|
2021-01-08 14:25:39 +00:00
|
|
|
int ret, retries = TBNET_LOGOUT_RETRIES;
|
2017-10-02 10:38:45 +00:00
|
|
|
|
|
|
|
while (send_logout && retries-- > 0) {
|
2021-01-08 14:25:39 +00:00
|
|
|
ret = tbnet_logout_request(net);
|
2017-10-02 10:38:45 +00:00
|
|
|
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);
|
|
|
|
|
2021-01-08 14:25:39 +00:00
|
|
|
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)
|
2017-10-02 10:38:45 +00:00
|
|
|
netdev_warn(net->dev, "failed to disable DMA paths\n");
|
2021-01-08 14:25:39 +00:00
|
|
|
|
|
|
|
tb_xdomain_release_in_hopid(net->xd, net->remote_transmit_path);
|
|
|
|
net->remote_transmit_path = 0;
|
2017-10-02 10:38:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
2017-10-17 12:33:01 +00:00
|
|
|
u32 sequence;
|
2017-10-02 10:38:45 +00:00
|
|
|
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;
|
2021-01-08 14:25:39 +00:00
|
|
|
net->remote_transmit_path = pkg->transmit_path;
|
2017-10-02 10:38:45 +00:00
|
|
|
|
|
|
|
/* 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)
|
2018-02-12 14:10:20 +00:00
|
|
|
queue_work(system_long_wq, &net->disconnect_work);
|
2017-10-02 10:38:45 +00:00
|
|
|
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;
|
2017-11-24 11:05:36 +00:00
|
|
|
struct device *dma_dev = tb_ring_dma_device(ring->ring);
|
2017-10-02 10:38:45 +00:00
|
|
|
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;
|
2017-11-24 11:05:36 +00:00
|
|
|
|
|
|
|
dma_sync_single_for_cpu(dma_dev, tf->frame.buffer_phy,
|
|
|
|
tbnet_frame_size(tf), DMA_TO_DEVICE);
|
2017-10-02 10:38:45 +00:00
|
|
|
|
|
|
|
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;
|
2017-11-24 11:05:36 +00:00
|
|
|
struct device *dma_dev = tb_ring_dma_device(ring->ring);
|
2017-10-02 10:38:45 +00:00
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < TBNET_RING_SIZE; i++) {
|
|
|
|
struct tbnet_frame *tf = &ring->frames[i];
|
2017-11-24 11:05:36 +00:00
|
|
|
dma_addr_t dma_addr;
|
2017-10-02 10:38:45 +00:00
|
|
|
|
|
|
|
tf->page = alloc_page(GFP_KERNEL);
|
|
|
|
if (!tf->page) {
|
|
|
|
tbnet_free_buffers(ring);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2017-11-24 11:05:36 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2017-10-02 10:38:45 +00:00
|
|
|
tf->dev = net->dev;
|
2017-11-24 11:05:36 +00:00
|
|
|
tf->frame.buffer_phy = dma_addr;
|
2017-10-02 10:38:45 +00:00
|
|
|
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;
|
|
|
|
|
2021-01-08 14:25:39 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2022-08-30 15:32:46 +00:00
|
|
|
/* 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.
|
2017-10-02 10:38:45 +00:00
|
|
|
*/
|
|
|
|
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;
|
|
|
|
|
2022-08-30 15:32:46 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2017-10-02 10:38:45 +00:00
|
|
|
netif_carrier_on(net->dev);
|
|
|
|
netif_start_queue(net->dev);
|
|
|
|
return;
|
|
|
|
|
2022-08-30 15:32:46 +00:00
|
|
|
err_free_tx_buffers:
|
|
|
|
tbnet_free_buffers(&net->tx_ring);
|
2017-10-02 10:38:45 +00:00
|
|
|
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);
|
2021-01-08 14:25:39 +00:00
|
|
|
tb_xdomain_release_in_hopid(net->xd, net->remote_transmit_path);
|
2017-10-02 10:38:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-02-12 14:10:20 +00:00
|
|
|
static void tbnet_disconnect_work(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct tbnet *net = container_of(work, typeof(*net), disconnect_work);
|
|
|
|
|
|
|
|
tbnet_tear_down(net, false);
|
|
|
|
}
|
|
|
|
|
2017-10-02 10:38:45 +00:00
|
|
|
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;
|
2021-01-08 14:25:39 +00:00
|
|
|
int hopid;
|
2017-10-02 10:38:45 +00:00
|
|
|
|
|
|
|
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;
|
|
|
|
|
2021-01-08 14:25:39 +00:00
|
|
|
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;
|
|
|
|
|
2017-10-02 10:38:45 +00:00
|
|
|
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,
|
2020-10-19 16:15:20 +00:00
|
|
|
RING_FLAG_FRAME, 0, sof_mask, eof_mask,
|
2020-06-09 15:10:39 +00:00
|
|
|
tbnet_start_poll, net);
|
2017-10-02 10:38:45 +00:00
|
|
|
if (!ring) {
|
|
|
|
netdev_err(dev, "failed to allocate Rx ring\n");
|
|
|
|
tb_ring_free(net->tx_ring.ring);
|
|
|
|
net->tx_ring.ring = NULL;
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
net->rx_ring.ring = ring;
|
|
|
|
|
|
|
|
napi_enable(&net->napi);
|
|
|
|
start_login(net);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tbnet_stop(struct net_device *dev)
|
|
|
|
{
|
|
|
|
struct tbnet *net = netdev_priv(dev);
|
|
|
|
|
|
|
|
napi_disable(&net->napi);
|
|
|
|
|
2018-02-12 14:10:20 +00:00
|
|
|
cancel_work_sync(&net->disconnect_work);
|
2017-10-02 10:38:45 +00:00
|
|
|
tbnet_tear_down(net, true);
|
|
|
|
|
|
|
|
tb_ring_free(net->rx_ring.ring);
|
|
|
|
net->rx_ring.ring = NULL;
|
2021-01-08 14:25:39 +00:00
|
|
|
|
|
|
|
tb_xdomain_release_out_hopid(net->xd, net->local_transmit_path);
|
2017-10-02 10:38:45 +00:00
|
|
|
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
|
2017-11-24 11:05:36 +00:00
|
|
|
* total frame count and sync the frames for DMA.
|
2017-10-02 10:38:45 +00:00
|
|
|
*/
|
|
|
|
for (i = 0; i < frame_count; i++) {
|
|
|
|
hdr = page_address(frames[i]->page);
|
|
|
|
hdr->frame_count = cpu_to_le32(frame_count);
|
2017-11-24 11:05:36 +00:00
|
|
|
dma_sync_single_for_device(dma_dev,
|
|
|
|
frames[i]->frame.buffer_phy,
|
|
|
|
tbnet_frame_size(frames[i]), DMA_TO_DEVICE);
|
2017-10-02 10:38:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (protocol == htons(ETH_P_8021Q)) {
|
|
|
|
struct vlan_hdr *vhdr, vh;
|
|
|
|
|
|
|
|
vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(vh), &vh);
|
|
|
|
if (!vhdr)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
protocol = vhdr->h_vlan_encapsulated_proto;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Data points on the beginning of packet.
|
|
|
|
* Check is the checksum absolute place in the packet.
|
|
|
|
* ipcso will update IP checksum.
|
|
|
|
* tucso will update TCP/UPD checksum.
|
|
|
|
*/
|
|
|
|
if (protocol == htons(ETH_P_IP)) {
|
|
|
|
__sum16 *ipcso = dest + ((void *)&(ip_hdr(skb)->check) - data);
|
|
|
|
|
|
|
|
*ipcso = 0;
|
|
|
|
*ipcso = ip_fast_csum(dest + skb_network_offset(skb),
|
|
|
|
ip_hdr(skb)->ihl);
|
|
|
|
|
|
|
|
if (ip_hdr(skb)->protocol == IPPROTO_TCP)
|
|
|
|
tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data);
|
|
|
|
else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
|
|
|
|
tucso = dest + ((void *)&(udp_hdr(skb)->check) - data);
|
|
|
|
else
|
|
|
|
return false;
|
|
|
|
|
|
|
|
*tucso = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
|
|
|
|
ip_hdr(skb)->daddr, 0,
|
|
|
|
ip_hdr(skb)->protocol, 0);
|
|
|
|
} else if (skb_is_gso_v6(skb)) {
|
|
|
|
tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data);
|
|
|
|
*tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
|
|
|
|
&ipv6_hdr(skb)->daddr, 0,
|
|
|
|
IPPROTO_TCP, 0);
|
|
|
|
return false;
|
|
|
|
} else if (protocol == htons(ETH_P_IPV6)) {
|
|
|
|
tucso = dest + skb_checksum_start_offset(skb) + skb->csum_offset;
|
|
|
|
*tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
|
|
|
|
&ipv6_hdr(skb)->daddr, 0,
|
|
|
|
ipv6_hdr(skb)->nexthdr, 0);
|
|
|
|
} else {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* First frame was headers, rest of the frames contain data.
|
|
|
|
* Calculate checksum over each frame.
|
|
|
|
*/
|
|
|
|
for (i = 0; i < frame_count; i++) {
|
|
|
|
hdr = page_address(frames[i]->page);
|
|
|
|
dest = (void *)(hdr + 1) + offset;
|
|
|
|
len = le32_to_cpu(hdr->frame_size) - offset;
|
|
|
|
wsum = csum_partial(dest, len, wsum);
|
|
|
|
hdr->frame_count = cpu_to_le32(frame_count);
|
|
|
|
|
|
|
|
offset = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
*tucso = csum_fold(wsum);
|
|
|
|
|
|
|
|
/* Checksum is finally calculated and we don't touch the memory
|
2017-11-24 11:05:36 +00:00
|
|
|
* anymore, so DMA sync the frames now.
|
2017-10-02 10:38:45 +00:00
|
|
|
*/
|
|
|
|
for (i = 0; i < frame_count; i++) {
|
2017-11-24 11:05:36 +00:00
|
|
|
dma_sync_single_for_device(dma_dev, frames[i]->frame.buffer_phy,
|
|
|
|
tbnet_frame_size(frames[i]), DMA_TO_DEVICE);
|
2017-10-02 10:38:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
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);
|
2019-07-30 14:40:33 +00:00
|
|
|
return kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag);
|
2017-10-02 10:38:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
2021-10-26 17:55:47 +00:00
|
|
|
u8 addr[ETH_ALEN];
|
2017-10-02 10:38:45 +00:00
|
|
|
u8 phy_port;
|
|
|
|
u32 hash;
|
|
|
|
|
|
|
|
phy_port = tb_phy_port_from_link(TBNET_L0_PORT_NUM(xd->route));
|
|
|
|
|
|
|
|
/* Unicast and locally administered MAC */
|
2021-10-26 17:55:47 +00:00
|
|
|
addr[0] = phy_port << 4 | 0x02;
|
2017-10-02 10:38:45 +00:00
|
|
|
hash = jhash2((u32 *)xd->local_uuid, 4, 0);
|
2021-10-26 17:55:47 +00:00
|
|
|
memcpy(addr + 1, &hash, sizeof(hash));
|
2017-10-02 10:38:45 +00:00
|
|
|
hash = jhash2((u32 *)xd->local_uuid, 4, hash);
|
2021-10-26 17:55:47 +00:00
|
|
|
addr[5] = hash & 0xff;
|
|
|
|
eth_hw_addr_set(dev, addr);
|
2017-10-02 10:38:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
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);
|
2018-02-12 14:10:20 +00:00
|
|
|
INIT_WORK(&net->disconnect_work, tbnet_disconnect_work);
|
2017-10-02 10:38:45 +00:00
|
|
|
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;
|
2020-12-09 13:38:52 +00:00
|
|
|
net->handler.callback = tbnet_handle_packet;
|
2017-10-02 10:38:45 +00:00
|
|
|
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);
|
2018-02-12 14:10:19 +00:00
|
|
|
tbnet_tear_down(net, true);
|
2017-10-02 10:38:45 +00:00
|
|
|
}
|
|
|
|
|
2018-09-28 09:21:17 +00:00
|
|
|
tb_unregister_protocol_handler(&net->handler);
|
2017-10-02 10:38:45 +00:00
|
|
|
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);
|
|
|
|
|
2018-09-28 09:21:17 +00:00
|
|
|
tb_register_protocol_handler(&net->handler);
|
|
|
|
|
2017-10-02 10:38:45 +00:00
|
|
|
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);
|
2020-06-22 16:30:22 +00:00
|
|
|
/* 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.
|
|
|
|
*/
|
2017-10-02 10:38:45 +00:00
|
|
|
tb_property_add_immediate(tbnet_dir, "prtcstns",
|
2021-01-08 14:33:03 +00:00
|
|
|
TBNET_MATCH_FRAGS_ID | TBNET_64K_FRAMES);
|
2017-10-02 10:38:45 +00:00
|
|
|
|
|
|
|
ret = tb_register_property_dir("network", tbnet_dir);
|
|
|
|
if (ret) {
|
|
|
|
tb_property_free_dir(tbnet_dir);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
return tb_register_service_driver(&tbnet_driver);
|
|
|
|
}
|
|
|
|
module_init(tbnet_init);
|
|
|
|
|
|
|
|
static void __exit tbnet_exit(void)
|
|
|
|
{
|
|
|
|
tb_unregister_service_driver(&tbnet_driver);
|
|
|
|
tb_unregister_property_dir("network", tbnet_dir);
|
|
|
|
tb_property_free_dir(tbnet_dir);
|
|
|
|
}
|
|
|
|
module_exit(tbnet_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Amir Levy <amir.jer.levy@intel.com>");
|
|
|
|
MODULE_AUTHOR("Michael Jamet <michael.jamet@intel.com>");
|
|
|
|
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
|
|
|
|
MODULE_DESCRIPTION("Thunderbolt network driver");
|
|
|
|
MODULE_LICENSE("GPL v2");
|