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authorMika Westerberg <mika.westerberg@linux.intel.com>2019-03-21 15:31:14 +0200
committerMika Westerberg <mika.westerberg@linux.intel.com>2019-11-02 12:13:31 +0300
commit354a7a7716edb377953a324421915d7788e0bca9 (patch)
tree1989c57e687d445faaaa6f2c0ef3265438faca0b /drivers/thunderbolt
parenta11b88add4401d006ab593c525c0dddc8ace7655 (diff)
downloadlinux-354a7a7716edb377953a324421915d7788e0bca9.tar.bz2
thunderbolt: Do not start firmware unless asked by the user
Since now we can do pretty much the same thing in the software connection manager than the firmware would do, there is no point starting it by default. Instead we can just continue using the software connection manager. Make it possible for user to switch between the two by adding a module pararameter (start_icm) which is by default false. Having this ability to enable the firmware may be useful at least when debugging possible issues with the software connection manager implementation. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
-rw-r--r--drivers/thunderbolt/icm.c23
-rw-r--r--drivers/thunderbolt/tb.c4
2 files changed, 19 insertions, 8 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index 78480b782045..13e88109742e 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -11,6 +11,7 @@
#include <linux/delay.h>
#include <linux/mutex.h>
+#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/platform_data/x86/apple.h>
@@ -43,6 +44,10 @@
#define ICM_APPROVE_TIMEOUT 10000 /* ms */
#define ICM_MAX_LINK 4
+static bool start_icm;
+module_param(start_icm, bool, 0444);
+MODULE_PARM_DESC(start_icm, "start ICM firmware if it is not running (default: false)");
+
/**
* struct icm - Internal connection manager private data
* @request_lock: Makes sure only one message is send to ICM at time
@@ -350,6 +355,14 @@ static void icm_veto_end(struct tb *tb)
}
}
+static bool icm_firmware_running(const struct tb_nhi *nhi)
+{
+ u32 val;
+
+ val = ioread32(nhi->iobase + REG_FW_STS);
+ return !!(val & REG_FW_STS_ICM_EN);
+}
+
static bool icm_fr_is_supported(struct tb *tb)
{
return !x86_apple_machine;
@@ -1381,9 +1394,12 @@ static bool icm_ar_is_supported(struct tb *tb)
/*
* Starting from Alpine Ridge we can use ICM on Apple machines
* as well. We just need to reset and re-enable it first.
+ * However, only start it if explicitly asked by the user.
*/
- if (!x86_apple_machine)
+ if (icm_firmware_running(tb->nhi))
return true;
+ if (!start_icm)
+ return false;
/*
* Find the upstream PCIe port in case we need to do reset
@@ -1736,8 +1752,7 @@ static int icm_firmware_start(struct tb *tb, struct tb_nhi *nhi)
u32 val;
/* Check if the ICM firmware is already running */
- val = ioread32(nhi->iobase + REG_FW_STS);
- if (val & REG_FW_STS_ICM_EN)
+ if (icm_firmware_running(nhi))
return 0;
dev_dbg(&nhi->pdev->dev, "starting ICM firmware\n");
@@ -2244,7 +2259,7 @@ struct tb *icm_probe(struct tb_nhi *nhi)
case PCI_DEVICE_ID_INTEL_ICL_NHI0:
case PCI_DEVICE_ID_INTEL_ICL_NHI1:
- icm->is_supported = icm_ar_is_supported;
+ icm->is_supported = icm_fr_is_supported;
icm->driver_ready = icm_icl_driver_ready;
icm->set_uuid = icm_icl_set_uuid;
icm->device_connected = icm_icl_device_connected;
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index bb763a5cf103..ea8727f769d6 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -9,7 +9,6 @@
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/delay.h>
-#include <linux/platform_data/x86/apple.h>
#include "tb.h"
#include "tb_regs.h"
@@ -990,9 +989,6 @@ struct tb *tb_probe(struct tb_nhi *nhi)
struct tb_cm *tcm;
struct tb *tb;
- if (!x86_apple_machine)
- return NULL;
-
tb = tb_domain_alloc(nhi, sizeof(*tcm));
if (!tb)
return NULL;