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thunderbolt: Introduce thunderbolt bus and connection manager

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Thunderbolt fabric consists of one or more switches. This fabric is
called domain and it is controlled by an entity called connection
manager. The connection manager can be either internal (driven by a
firmware running on the host controller) or external (software driver).
This driver currently implements support for the latter.

In order to manage switches and their properties more easily we model
this domain structure as a Linux bus. Each host controller adds a domain
device to this bus, and these devices are named as domainN where N
stands for index or id of the current domain.

We then abstract connection manager specific operations into a new
structure tb_cm_ops and convert the existing tb.c to fill those
accordingly. This makes it easier to add support for the internal
connection manager in subsequent patches.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Reviewed-by: Michael Jamet <michael.jamet@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mika Westerberg
2017-06-06 15:25:00 +03:00
committed by Greg Kroah-Hartman
parent c9843ebbb8
commit 9d3cce0b61
6 changed files with 377 additions and 121 deletions
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9
drivers/thunderbolt/tunnel_pci.c
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@@ -194,19 +194,13 @@ err:
*/
int tb_pci_activate(struct tb_pci_tunnel *tunnel)
{
int res;
if (tunnel->path_to_up->activated || tunnel->path_to_down->activated) {
tb_tunnel_WARN(tunnel,
"trying to activate an already activated tunnel\n");
return -EINVAL;
}
res = tb_pci_restart(tunnel);
if (res)
return res;
list_add(&tunnel->list, &tunnel->tb->tunnel_list);
return 0;
return tb_pci_restart(tunnel);
}
@@ -227,6 +221,5 @@ void tb_pci_deactivate(struct tb_pci_tunnel *tunnel)
tb_path_deactivate(tunnel->path_to_down);
if (tunnel->path_to_up->activated)
tb_path_deactivate(tunnel->path_to_up);
list_del_init(&tunnel->list);
}