diff options
Diffstat (limited to 'drivers/thunderbolt/tunnel.c')
| -rw-r--r-- | drivers/thunderbolt/tunnel.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c index 382331d71c28..3353396e0806 100644 --- a/drivers/thunderbolt/tunnel.c +++ b/drivers/thunderbolt/tunnel.c @@ -90,6 +90,22 @@ static int tb_pci_activate(struct tb_tunnel *tunnel, bool activate) return 0; } +static int tb_initial_credits(const struct tb_switch *sw) +{ + /* If the path is complete sw is not NULL */ + if (sw) { + /* More credits for faster link */ + switch (sw->link_speed * sw->link_width) { + case 40: + return 32; + case 20: + return 24; + } + } + + return 16; +} + static void tb_pci_init_path(struct tb_path *path) { path->egress_fc_enable = TB_PATH_SOURCE | TB_PATH_INTERNAL; @@ -101,7 +117,8 @@ static void tb_pci_init_path(struct tb_path *path) path->drop_packages = 0; path->nfc_credits = 0; path->hops[0].initial_credits = 7; - path->hops[1].initial_credits = 16; + path->hops[1].initial_credits = + tb_initial_credits(path->hops[1].in_port->sw); } /** |