From 5e9e979fae229480d1a4af4f247c0251cb2852f9 Mon Sep 17 00:00:00 2001
From: Fedora X Ninjas <x@fedoraproject.org>
Date: Fri, 12 Apr 2013 10:16:21 +1000
Subject: [PATCH] fix GPU hotplugging while VT switched.
Backports 3 patches from upstream into one.
---
hw/xfree86/common/xf86.h | 1 +
hw/xfree86/common/xf86Events.c | 15 +++++++++-
hw/xfree86/common/xf86Init.c | 2 +-
hw/xfree86/common/xf86Xinput.c | 2 +-
hw/xfree86/common/xf86platformBus.c | 19 +++++++++++++
hw/xfree86/common/xf86platformBus.h | 4 +++
hw/xfree86/os-support/linux/lnx_platform.c | 45 ++++++++++++++++++++++++++----
hw/xfree86/os-support/solaris/sun_init.c | 2 +-
hw/xfree86/os-support/xf86_OSproc.h | 3 ++
include/hotplug.h | 1 +
10 files changed, 85 insertions(+), 9 deletions(-)
diff --git a/hw/xfree86/common/xf86.h b/hw/xfree86/common/xf86.h
index 1514c26..828d958 100644
--- a/hw/xfree86/common/xf86.h
+++ b/hw/xfree86/common/xf86.h
@@ -243,6 +243,7 @@ extern _X_EXPORT void xf86InterceptSigIll(void (*sigillhandler) (void));
extern _X_EXPORT Bool xf86EnableVTSwitch(Bool new);
extern _X_EXPORT void xf86ProcessActionEvent(ActionEvent action, void *arg);
extern _X_EXPORT void xf86PrintBacktrace(void);
+extern _X_EXPORT Bool xf86VTOwner(void);
/* xf86Helper.c */
diff --git a/hw/xfree86/common/xf86Events.c b/hw/xfree86/common/xf86Events.c
index d92174e..7a35250 100644
--- a/hw/xfree86/common/xf86Events.c
+++ b/hw/xfree86/common/xf86Events.c
@@ -84,6 +84,7 @@
#include "dpmsproc.h"
#endif
+#include "xf86platformBus.h"
/*
* This is a toggling variable:
* FALSE = No VT switching keys have been pressed last time around
@@ -428,7 +429,7 @@ xf86VTSwitch(void)
* Since all screens are currently all in the same state it is sufficient
* check the first. This might change in future.
*/
- if (xf86Screens[0]->vtSema) {
+ if (xf86VTOwner()) {
DebugF("xf86VTSwitch: Leaving, xf86Exiting is %s\n",
BOOLTOSTRING((dispatchException & DE_TERMINATE) ? TRUE : FALSE));
@@ -561,6 +562,9 @@ xf86VTSwitch(void)
for (ih = InputHandlers; ih; ih = ih->next)
xf86EnableInputHandler(ih);
+ /* check for any new output devices */
+ xf86platformVTProbe();
+
OsReleaseSIGIO();
}
}
@@ -769,3 +773,12 @@ DDXRingBell(int volume, int pitch, int duration)
{
xf86OSRingBell(volume, pitch, duration);
}
+
+Bool
+xf86VTOwner(void)
+{
+ /* at system startup xf86Screens[0] won't be set - but we will own the VT */
+ if (xf86NumScreens == 0)
+ return TRUE;
+ return xf86Screens[0]->vtSema;
+}
diff --git a/hw/xfree86/common/xf86Init.c b/hw/xfree86/common/xf86Init.c
index a34d7c1..142ce95 100644
--- a/hw/xfree86/common/xf86Init.c
+++ b/hw/xfree86/common/xf86Init.c
@@ -829,7 +829,7 @@ InitOutput(ScreenInfo * pScreenInfo, int argc, char **argv)
if (serverGeneration != 1) {
xf86Resetting = TRUE;
/* All screens are in the same state, so just check the first */
- if (!xf86Screens[0]->vtSema) {
+ if (!xf86VTOwner()) {
#ifdef HAS_USL_VTS
ioctl(xf86Info.consoleFd, VT_RELDISP, VT_ACKACQ);
#endif
diff --git a/hw/xfree86/common/xf86Xinput.c b/hw/xfree86/common/xf86Xinput.c
index bee407b..26c03c6 100644
--- a/hw/xfree86/common/xf86Xinput.c
+++ b/hw/xfree86/common/xf86Xinput.c
@@ -870,7 +870,7 @@ xf86NewInputDevice(InputInfoPtr pInfo, DeviceIntPtr *pdev, BOOL enable)
}
/* Enable it if it's properly initialised and we're currently in the VT */
- if (enable && dev->inited && dev->startup && xf86Screens[0]->vtSema) {
+ if (enable && dev->inited && dev->startup && xf86VTOwner()) {
OsBlockSignals();
EnableDevice(dev, TRUE);
if (!dev->enabled) {
diff --git a/hw/xfree86/common/xf86platformBus.c b/hw/xfree86/common/xf86platformBus.c
index 4ccb005..0b0f846 100644
--- a/hw/xfree86/common/xf86platformBus.c
+++ b/hw/xfree86/common/xf86platformBus.c
@@ -114,6 +114,11 @@ xf86_get_platform_device_attrib(struct xf86_platform_device *device, int attrib_
return NULL;
}
+Bool
+xf86_get_platform_device_unowned(int index)
+{
+ return xf86_platform_devices[index].attribs->unowned;
+}
/*
* xf86IsPrimaryPlatform() -- return TRUE if primary device
@@ -502,4 +507,18 @@ xf86platformRemoveDevice(int index)
out:
return;
}
+
+/* called on return from VT switch to find any new devices */
+void xf86platformVTProbe(void)
+{
+ int i;
+
+ for (i = 0; i < xf86_num_platform_devices; i++) {
+ if (xf86_platform_devices[i].attribs->unowned == FALSE)
+ continue;
+
+ xf86_platform_devices[i].attribs->unowned = FALSE;
+ xf86PlatformReprobeDevice(i, xf86_platform_devices[i].attribs);
+ }
+}
#endif
diff --git a/hw/xfree86/common/xf86platformBus.h b/hw/xfree86/common/xf86platformBus.h
index 49afc24..4e17578 100644
--- a/hw/xfree86/common/xf86platformBus.h
+++ b/hw/xfree86/common/xf86platformBus.h
@@ -46,6 +46,8 @@ extern int
xf86_remove_platform_device(int dev_index);
extern Bool
xf86_add_platform_device_attrib(int index, int attrib_id, char *attrib_str);
+extern Bool
+xf86_get_platform_device_unowned(int index);
extern int
xf86platformAddDevice(int index);
@@ -59,6 +61,8 @@ xf86PlatformDeviceCheckBusID(struct xf86_platform_device *device, const char *bu
extern _X_EXPORT int
xf86PlatformMatchDriver(char *matches[], int nmatches);
+
+extern void xf86platformVTProbe(void);
#endif
#endif
diff --git a/hw/xfree86/os-support/linux/lnx_platform.c b/hw/xfree86/os-support/linux/lnx_platform.c
index 76f5583..21768ee 100644
--- a/hw/xfree86/os-support/linux/lnx_platform.c
+++ b/hw/xfree86/os-support/linux/lnx_platform.c
@@ -18,7 +18,7 @@
#include "hotplug.h"
static Bool
-get_drm_info(struct OdevAttributes *attribs, char *path)
+get_drm_info(struct OdevAttributes *attribs, char *path, int delayed_index)
{
drmSetVersion sv;
char *buf;
@@ -37,10 +37,14 @@ get_drm_info(struct OdevAttributes *attribs, char *path)
return FALSE;
}
- xf86_add_platform_device(attribs);
+ /* for a delayed probe we've already added the device */
+ if (delayed_index == -1) {
+ xf86_add_platform_device(attribs);
+ delayed_index = xf86_num_platform_devices - 1;
+ }
buf = drmGetBusid(fd);
- xf86_add_platform_device_attrib(xf86_num_platform_devices - 1,
+ xf86_add_platform_device_attrib(delayed_index,
ODEV_ATTRIB_BUSID, buf);
drmFreeBusid(buf);
close(fd);
@@ -89,6 +93,23 @@ xf86PlatformDeviceCheckBusID(struct xf86_platform_device *device, const char *bu
}
void
+xf86PlatformReprobeDevice(int index, struct OdevAttributes *attribs)
+{
+ Bool ret;
+ char *dpath;
+ dpath = xf86_get_platform_attrib(index, ODEV_ATTRIB_PATH);
+
+ ret = get_drm_info(attribs, dpath, index);
+ if (ret == FALSE) {
+ xf86_remove_platform_device(index);
+ return;
+ }
+ ret = xf86platformAddDevice(index);
+ if (ret == -1)
+ xf86_remove_platform_device(index);
+}
+
+void
xf86PlatformDeviceProbe(struct OdevAttributes *attribs)
{
struct OdevAttribute *attrib;
@@ -119,7 +140,15 @@ xf86PlatformDeviceProbe(struct OdevAttributes *attribs)
LogMessage(X_INFO, "config/udev: Adding drm device (%s)\n",
path);
- ret = get_drm_info(attribs, path);
+ if (!xf86VTOwner()) {
+ /* if we don't currently own the VT then don't probe the device,
+ just mark it as unowned for later use */
+ attribs->unowned = TRUE;
+ xf86_add_platform_device(attribs);
+ return;
+ }
+
+ ret = get_drm_info(attribs, path, -1);
if (ret == FALSE)
goto out_free;
@@ -138,6 +167,9 @@ void NewGPUDeviceRequest(struct OdevAttributes *attribs)
if (old_num == xf86_num_platform_devices)
return;
+ if (xf86_get_platform_device_unowned(xf86_num_platform_devices - 1) == TRUE)
+ return;
+
ret = xf86platformAddDevice(xf86_num_platform_devices-1);
if (ret == -1)
xf86_remove_platform_device(xf86_num_platform_devices-1);
@@ -171,7 +203,10 @@ void DeleteGPUDeviceRequest(struct OdevAttributes *attribs)
ErrorF("xf86: remove device %d %s\n", index, syspath);
- xf86platformRemoveDevice(index);
+ if (xf86_get_platform_device_unowned(index) == TRUE)
+ xf86_remove_platform_device(index);
+ else
+ xf86platformRemoveDevice(index);
out:
config_odev_free_attribute_list(attribs);
}
diff --git a/hw/xfree86/os-support/solaris/sun_init.c b/hw/xfree86/os-support/solaris/sun_init.c
index 4b75a98..68527a5 100644
--- a/hw/xfree86/os-support/solaris/sun_init.c
+++ b/hw/xfree86/os-support/solaris/sun_init.c
@@ -274,7 +274,7 @@ xf86OpenConsole(void)
* this is to make sure we don't continue until the activate
* signal is received.
*/
- if (!xf86Screens[0]->vtSema)
+ if (!xf86VTOwner())
sleep(5);
}
#endif /* HAS_USL_VTS */
diff --git a/hw/xfree86/os-support/xf86_OSproc.h b/hw/xfree86/os-support/xf86_OSproc.h
index ea2b16e..6be5946 100644
--- a/hw/xfree86/os-support/xf86_OSproc.h
+++ b/hw/xfree86/os-support/xf86_OSproc.h
@@ -223,6 +223,9 @@ extern _X_EXPORT void xf86InitVidMem(void);
#include "hotplug.h"
void
xf86PlatformDeviceProbe(struct OdevAttributes *attribs);
+
+void
+xf86PlatformReprobeDevice(int index, struct OdevAttributes *attribs);
#endif
_XFUNCPROTOEND
diff --git a/include/hotplug.h b/include/hotplug.h
index 2a95b45..29a22c4 100644
--- a/include/hotplug.h
+++ b/include/hotplug.h
@@ -40,6 +40,7 @@ struct OdevAttribute {
struct OdevAttributes {
struct xorg_list list;
+ Bool unowned;
};
struct OdevAttributes *
--
1.8.2