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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2018-09-28 16:35:32 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2019-04-18 11:18:53 +0300 |
| commit | 44242d6c9703208e7e7abd6b4dbb258a930dd01a (patch) | |
| tree | e6705e5cbff04126399d3ebb8a8a4677b9aa8ce1 /drivers/thunderbolt/tb.h | |
| parent | 3b4b3235ca5bf1b69ff15a269d9881b2604dd4fa (diff) | |
| download | lwn-44242d6c9703208e7e7abd6b4dbb258a930dd01a.tar.gz lwn-44242d6c9703208e7e7abd6b4dbb258a930dd01a.zip | |
thunderbolt: Add support for DMA tunnels
In addition to PCIe and Display Port tunnels it is also possible to
create tunnels that forward DMA traffic from the host interface adapter
(NHI) to a NULL port that is connected to another domain through a
Thunderbolt cable. These tunnels can be used to carry software messages
such as networking packets.
To support this we introduce another tunnel type (TB_TUNNEL_DMA) that
supports paths from NHI to NULL port and back.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.h')
| -rw-r--r-- | drivers/thunderbolt/tb.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 89b5d18f6035..119a00837992 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -207,6 +207,8 @@ enum tb_path_port { * @weight: Weight of the path inside the priority group * @drop_packages: Drop packages from queue tail or head * @activated: Is the path active + * @clear_fc: Clear all flow control from the path config space entries + * when deactivating this path * @hops: Path hops * @path_length: How many hops the path uses * @@ -227,6 +229,7 @@ struct tb_path { int weight:4; bool drop_packages; bool activated; + bool clear_fc; struct tb_path_hop *hops; int path_length; }; @@ -583,6 +586,7 @@ static inline bool tb_switch_is_fr(const struct tb_switch *sw) int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged); int tb_port_add_nfc_credits(struct tb_port *port, int credits); +int tb_port_set_initial_credits(struct tb_port *port, u32 credits); int tb_port_clear_counter(struct tb_port *port, int counter); int tb_port_alloc_in_hopid(struct tb_port *port, int hopid, int max_hopid); void tb_port_release_in_hopid(struct tb_port *port, int hopid); |