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drm/radeon: wire up a pci shutdown callback 

Normally on shutdown or reboot we don't care about necessarily
making sure the hw is in a good state because the system is about
to be powered down or reset.  However, after a shutdown or reboot
in a VM, it's best to tear down the hw properly otherwise there
can be problems with the next VM use.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-08-22 14:29:44 -04:00
parent 61e113067b
commit a801abe477
2 changed files with 14 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/radeon/radeon_device.c
View File

@ -639,7 +639,7 @@ void radeon_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
* Used at driver startup.
* Returns true if virtual or false if not.
*/
static bool radeon_device_is_virtual(void)
bool radeon_device_is_virtual(void)
{
#ifdef CONFIG_X86
return boot_cpu_has(X86_FEATURE_HYPERVISOR);

13
drivers/gpu/drm/radeon/radeon_drv.c
View File

@ -310,6 +310,8 @@ MODULE_DEVICE_TABLE(pci, pciidlist);
static struct drm_driver kms_driver;
bool radeon_device_is_virtual(void);
static int radeon_kick_out_firmware_fb(struct pci_dev *pdev)
{
struct apertures_struct *ap;
@ -363,6 +365,16 @@ radeon_pci_remove(struct pci_dev *pdev)
drm_put_dev(dev);
}
static void
radeon_pci_shutdown(struct pci_dev *pdev)
{
/* if we are running in a VM, make sure the device
* torn down properly on reboot/shutdown
*/
if (radeon_device_is_virtual())
radeon_pci_remove(pdev);
}
static int radeon_pmops_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
@ -583,6 +595,7 @@ static struct pci_driver radeon_kms_pci_driver = {
.id_table = pciidlist,
.probe = radeon_pci_probe,
.remove = radeon_pci_remove,
.shutdown = radeon_pci_shutdown,
.driver.pm = &radeon_pm_ops,
};