diff options
| 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/tunnel.h | |
| parent | 3b4b3235ca5bf1b69ff15a269d9881b2604dd4fa (diff) | |
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/tunnel.h')
| -rw-r--r-- | drivers/thunderbolt/tunnel.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tunnel.h b/drivers/thunderbolt/tunnel.h index 0373779f43ba..c68bbcd3a62c 100644 --- a/drivers/thunderbolt/tunnel.h +++ b/drivers/thunderbolt/tunnel.h @@ -14,6 +14,7 @@ enum tb_tunnel_type { TB_TUNNEL_PCI, TB_TUNNEL_DP, + TB_TUNNEL_DMA, }; /** @@ -47,6 +48,10 @@ struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up, struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in); struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in, struct tb_port *out); +struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, + struct tb_port *dst, int transmit_ring, + int transmit_path, int receive_ring, + int receive_path); void tb_tunnel_free(struct tb_tunnel *tunnel); int tb_tunnel_activate(struct tb_tunnel *tunnel); @@ -64,5 +69,10 @@ static inline bool tb_tunnel_is_dp(const struct tb_tunnel *tunnel) return tunnel->type == TB_TUNNEL_DP; } +static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel) +{ + return tunnel->type == TB_TUNNEL_DMA; +} + #endif |