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>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Christian Kellner <ckellner@redhat.com>,
Mario.Limonciello@dell.com, Joe Perches <joe@perches.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
netdev@vger.kernel.org
Subject: [PATCH v4 06/36] thunderbolt: Do not allocate switch if depth is greater than 6
Date: Wed, 10 Apr 2019 16:36:23 +0300 [thread overview]
Message-ID: <20190410133653.88061-7-mika.westerberg@linux.intel.com> (raw)
In-Reply-To: <20190410133653.88061-1-mika.westerberg@linux.intel.com>
Maximum depth in Thunderbolt topology is 6 so make sure it is not
possible to allocate switches that exceed the depth limit.
While at it update tb_switch_alloc() to use upper/lower_32_bits()
following tb_switch_alloc_safe_mode().
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
drivers/thunderbolt/icm.c | 5 ++---
drivers/thunderbolt/switch.c | 18 ++++++++++++------
drivers/thunderbolt/tb.h | 1 +
3 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index 7c923e16a7d8..bec360eef6cf 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -42,7 +42,6 @@
#define ICM_TIMEOUT 5000 /* ms */
#define ICM_APPROVE_TIMEOUT 10000 /* ms */
#define ICM_MAX_LINK 4
-#define ICM_MAX_DEPTH 6
/**
* struct icm - Internal connection manager private data
@@ -714,7 +713,7 @@ icm_fr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr)
depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
ICM_LINK_INFO_DEPTH_SHIFT;
- if (link > ICM_MAX_LINK || depth > ICM_MAX_DEPTH) {
+ if (link > ICM_MAX_LINK || depth > TB_SWITCH_MAX_DEPTH) {
tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth);
return;
}
@@ -744,7 +743,7 @@ icm_fr_xdomain_connected(struct tb *tb, const struct icm_pkg_header *hdr)
depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >>
ICM_LINK_INFO_DEPTH_SHIFT;
- if (link > ICM_MAX_LINK || depth > ICM_MAX_DEPTH) {
+ if (link > ICM_MAX_LINK || depth > TB_SWITCH_MAX_DEPTH) {
tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth);
return;
}
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 7fa4ab076404..1e29c06947af 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -1130,10 +1130,16 @@ static int tb_switch_get_generation(struct tb_switch *sw)
struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
u64 route)
{
- int i;
- int cap;
struct tb_switch *sw;
- int upstream_port = tb_cfg_get_upstream_port(tb->ctl, route);
+ int upstream_port;
+ int i, cap, depth;
+
+ /* Make sure we do not exceed maximum topology limit */
+ depth = tb_route_length(route);
+ if (depth > TB_SWITCH_MAX_DEPTH)
+ return NULL;
+
+ upstream_port = tb_cfg_get_upstream_port(tb->ctl, route);
if (upstream_port < 0)
return NULL;
@@ -1150,9 +1156,9 @@ struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
/* configure switch */
sw->config.upstream_port_number = upstream_port;
- sw->config.depth = tb_route_length(route);
- sw->config.route_lo = route;
- sw->config.route_hi = route >> 32;
+ sw->config.depth = depth;
+ sw->config.route_hi = upper_32_bits(route);
+ sw->config.route_lo = lower_32_bits(route);
sw->config.enabled = 0;
/* initialize ports */
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index f7b0c43c29a7..93c1ea21feeb 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -43,6 +43,7 @@ struct tb_switch_nvm {
};
#define TB_SWITCH_KEY_SIZE 32
+#define TB_SWITCH_MAX_DEPTH 6
/**
* struct tb_switch - a thunderbolt switch
--
2.20.1
next prev parent reply other threads:[~2019-04-10 13:42 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-10 13:36 [PATCH v4 00/36] thunderbolt: Software connection manager improvements Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 01/36] net: thunderbolt: Unregister ThunderboltIP protocol handler when suspending Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 02/36] thunderbolt: Remove unused work field in struct tb_switch Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 03/36] thunderbolt: Drop duplicated get_switch_at_route() Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 04/36] thunderbolt: Block reads and writes if switch is unplugged Mika Westerberg
2019-04-10 13:36 ` Mika Westerberg [this message]
2019-04-10 13:36 ` [PATCH v4 07/36] thunderbolt: Enable TMU access when accessing port space on legacy devices Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 08/36] thunderbolt: Add dummy read after port capability list walk on Light Ridge Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 09/36] thunderbolt: Move LC specific functionality into a separate file Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 10/36] thunderbolt: Configure lanes when switch is initialized Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 11/36] thunderbolt: Set sleep bit when suspending switch Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 12/36] thunderbolt: Properly disable path Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 13/36] thunderbolt: Cache adapter specific capability offset into struct port Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 14/36] thunderbolt: Rename tunnel_pci to tunnel Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 15/36] thunderbolt: Generalize tunnel creation functionality Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 16/36] thunderbolt: Add functions for allocating and releasing HopIDs Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 17/36] thunderbolt: Assign remote for both ports in case of dual link Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 18/36] thunderbolt: Add helper function to iterate from one port to another Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 19/36] thunderbolt: Extend tunnel creation to more than 2 adjacent switches Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 20/36] thunderbolt: Deactivate all paths before restarting them Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 21/36] thunderbolt: Discover preboot PCIe paths the boot firmware established Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 22/36] thunderbolt: Add support for full PCIe daisy chains Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 23/36] thunderbolt: Scan only valid NULL adapter ports in hotplug Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 24/36] thunderbolt: Generalize port finding routines to support all port types Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 25/36] thunderbolt: Rework NFC credits handling Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 26/36] thunderbolt: Add support for Display Port tunnels Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 27/36] thunderbolt: Do not tear down tunnels when driver is unloaded Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 28/36] thunderbolt: Run tb_xdp_handle_request() in system workqueue Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 29/36] thunderbolt: Add XDomain UUID exchange support Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 30/36] thunderbolt: Add support for DMA tunnels Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 31/36] thunderbolt: Make tb_switch_alloc() return ERR_PTR() Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 32/36] thunderbolt: Add support for XDomain connections Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 33/36] thunderbolt: Make __TB_[SW|PORT]_PRINT take const parameters Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 34/36] thunderbolt: Make rest of the logging to happen at debug level Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 35/36] thunderbolt: Reword output of tb_dump_hop() Mika Westerberg
2019-04-10 13:36 ` [PATCH v4 36/36] thunderbolt: Start firmware on Titan Ridge Apple systems Mika Westerberg
2019-04-18 8:26 ` [PATCH v4 00/36] thunderbolt: Software connection manager improvements Mika Westerberg
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