From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Michael Jamet <michael.jamet@intel.com>,
Yehezkel Bernat <YehezkelShB@gmail.com>,
Andreas Noever <andreas.noever@gmail.com>,
Lukas Wunner <lukas@wunner.de>,
"David S . Miller" <davem@davemloft.net>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
netdev@vger.kernel.org
Subject: [PATCH 19/28] thunderbolt: Generalize port finding routines to support all port types
Date: Tue, 29 Jan 2019 18:01:34 +0300 [thread overview]
Message-ID: <20190129150143.12681-20-mika.westerberg@linux.intel.com> (raw)
In-Reply-To: <20190129150143.12681-1-mika.westerberg@linux.intel.com>
We will be needing these routines to find Display Port adapters as well
so modify them to take port type as the second parameter.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
drivers/thunderbolt/switch.c | 16 ++++++++++++++++
drivers/thunderbolt/tb.c | 35 +++++++++++++++++------------------
drivers/thunderbolt/tb.h | 1 +
3 files changed, 34 insertions(+), 18 deletions(-)
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index c1bab1bc7150..de69ada9a2f7 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -743,6 +743,22 @@ struct tb_port *tb_port_get_next(struct tb_port *start, struct tb_port *end,
return next;
}
+/**
+ * tb_port_is_enabled() - Is the adapter port enabled
+ * @port: Port to check
+ */
+bool tb_port_is_enabled(struct tb_port *port)
+{
+ switch (port->config.type) {
+ case TB_TYPE_PCIE_UP:
+ case TB_TYPE_PCIE_DOWN:
+ return tb_pci_port_is_enabled(port);
+
+ default:
+ return false;
+ }
+}
+
/**
* tb_pci_port_is_enabled() - Is the PCIe adapter port enabled
* @port: PCIe port to check
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 1dcdf619d0f1..0df1d96e46f5 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -188,40 +188,39 @@ static void tb_free_unplugged_children(struct tb_switch *sw)
}
}
-
/**
- * find_pci_up_port() - return the first PCIe up port on @sw or NULL
+ * tb_find_port() - return the first port of @type on @sw or NULL
+ * @sw: Switch to find the port from
+ * @type: Port type to look for
*/
-static struct tb_port *tb_find_pci_up_port(struct tb_switch *sw)
+static struct tb_port *tb_find_port(struct tb_switch *sw,
+ enum tb_port_type type)
{
int i;
for (i = 1; i <= sw->config.max_port_number; i++)
- if (sw->ports[i].config.type == TB_TYPE_PCIE_UP)
+ if (sw->ports[i].config.type == type)
return &sw->ports[i];
return NULL;
}
/**
- * find_unused_down_port() - return the first inactive PCIe down port on @sw
+ * tb_find_unused_port() - return the first inactive port on @sw
+ * @sw: Switch to find the port on
+ * @type: Port type to look for
*/
-static struct tb_port *tb_find_unused_down_port(struct tb_switch *sw)
+static struct tb_port *tb_find_unused_port(struct tb_switch *sw,
+ enum tb_port_type type)
{
int i;
- int cap;
- int res;
- int data;
+
for (i = 1; i <= sw->config.max_port_number; i++) {
if (tb_is_upstream_port(&sw->ports[i]))
continue;
- if (sw->ports[i].config.type != TB_TYPE_PCIE_DOWN)
- continue;
- cap = sw->ports[i].cap_adap;
- if (cap < 0)
+ if (sw->ports[i].config.type != type)
continue;
- res = tb_port_read(&sw->ports[i], &data, TB_CFG_PORT, cap, 1);
- if (res < 0)
+ if (sw->ports[i].cap_adap < 0)
continue;
- if (data & 0x80000000)
+ if (tb_port_is_enabled(&sw->ports[i]))
continue;
return &sw->ports[i];
}
@@ -235,7 +234,7 @@ static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw)
struct tb_port *up, *down;
struct tb_tunnel *tunnel;
- up = tb_find_pci_up_port(sw);
+ up = tb_find_port(sw, TB_TYPE_PCIE_UP);
if (!up)
return 0;
@@ -246,7 +245,7 @@ static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw)
down = NULL;
parent_sw = tb_to_switch(sw->dev.parent);
while (parent_sw) {
- down = tb_find_unused_down_port(parent_sw);
+ down = tb_find_unused_port(parent_sw, TB_TYPE_PCIE_DOWN);
if (down)
break;
parent_sw = tb_to_switch(parent_sw->dev.parent);
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index b3a422ab4b4e..bf5bc0fb0f8e 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -463,6 +463,7 @@ struct tb_port *tb_port_get_next(struct tb_port *start, struct tb_port *end,
int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);
+bool tb_port_is_enabled(struct tb_port *port);
bool tb_pci_port_is_enabled(struct tb_port *port);
int tb_pci_port_enable(struct tb_port *port, bool enable);
--
2.20.1
next prev parent reply other threads:[~2019-01-29 15:04 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-29 15:01 [PATCH 00/28] thunderbolt: Software connection manager improvements Mika Westerberg
2019-01-29 15:01 ` [PATCH 01/28] net: thunderbolt: Unregister ThunderboltIP protocol handler when suspending Mika Westerberg
2019-01-29 18:10 ` David Miller
2019-01-29 15:01 ` [PATCH 02/28] thunderbolt: Do not allocate switch if depth is greater than 6 Mika Westerberg
2019-01-29 15:01 ` [PATCH 03/28] thunderbolt: Enable TMU access when accessing port space on legacy devices Mika Westerberg
2019-01-29 21:58 ` Lukas Wunner
2019-01-30 9:37 ` Mika Westerberg
2019-01-31 8:26 ` Lukas Wunner
2019-01-31 8:53 ` Mika Westerberg
2019-01-29 15:01 ` [PATCH 04/28] thunderbolt: Add dummy read after port capability list walk on Light Ridge Mika Westerberg
2019-01-29 15:01 ` [PATCH 05/28] thunderbolt: Move LC specific functionality into a separate file Mika Westerberg
2019-01-29 15:01 ` [PATCH 06/28] thunderbolt: Configure lanes when switch is initialized Mika Westerberg
2019-01-29 15:01 ` [PATCH 07/28] thunderbolt: Set sleep bit when suspending switch Mika Westerberg
2019-01-29 15:01 ` [PATCH 08/28] thunderbolt: Properly disable path Mika Westerberg
2019-01-29 15:01 ` [PATCH 09/28] thunderbolt: Cache adapter specific capability offset into struct port Mika Westerberg
2019-01-31 9:23 ` Lukas Wunner
2019-01-31 9:37 ` Mika Westerberg
2019-01-29 15:01 ` [PATCH 10/28] thunderbolt: Rename tunnel_pci to tunnel Mika Westerberg
2019-01-29 15:01 ` [PATCH 11/28] thunderbolt: Generalize tunnel creation functionality Mika Westerberg
2019-01-29 15:01 ` [PATCH 12/28] thunderbolt: Add functions for allocating and releasing hop IDs Mika Westerberg
2019-01-29 15:01 ` [PATCH 13/28] thunderbolt: Add helper function to iterate from one port to another Mika Westerberg
2019-01-29 15:01 ` [PATCH 14/28] thunderbolt: Extend tunnel creation to more than 2 adjacent switches Mika Westerberg
2019-01-29 15:01 ` [PATCH 15/28] thunderbolt: Deactivate all paths before restarting them Mika Westerberg
2019-01-29 15:01 ` [PATCH 16/28] thunderbolt: Discover preboot PCIe paths the boot firmware established Mika Westerberg
2019-01-29 15:01 ` [PATCH 17/28] thunderbolt: Add support for full PCIe daisy chains Mika Westerberg
2019-01-29 15:01 ` [PATCH 18/28] thunderbolt: Scan only valid NULL adapter ports in hotplug Mika Westerberg
2019-01-29 15:01 ` Mika Westerberg [this message]
2019-01-29 15:01 ` [PATCH 20/28] thunderbolt: Rework NFC credits handling Mika Westerberg
2019-01-29 15:01 ` [PATCH 21/28] thunderbolt: Add support for Display Port tunnels Mika Westerberg
2019-01-29 15:01 ` [PATCH 22/28] thunderbolt: Run tb_xdp_handle_request() in system workqueue Mika Westerberg
2019-01-29 15:01 ` [PATCH 23/28] thunderbolt: Add XDomain UUID exchange support Mika Westerberg
2019-01-29 15:01 ` [PATCH 24/28] thunderbolt: Add support for DMA tunnels Mika Westerberg
2019-01-29 15:01 ` [PATCH 25/28] thunderbolt: Make tb_switch_alloc() return ERR_PTR() Mika Westerberg
2019-01-29 15:01 ` [PATCH 26/28] thunderbolt: Add support for XDomain connections Mika Westerberg
2019-01-29 15:01 ` [PATCH 27/28] thunderbolt: Make rest of the logging to happen at debug level Mika Westerberg
2019-01-29 15:01 ` [PATCH 28/28] thunderbolt: Start firmware on Titan Ridge Apple systems Mika Westerberg
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