Commit 43c3e6ea authored by Matthew Brost's avatar Matthew Brost
Browse files

drm/xe: Add xe_device_asid_to_vm helper 



Introduce the xe_device_asid_to_vm helper, which can be used throughout
the driver to resolve the VM from a given ASID.

v4:
 - Move forward declare after includes (Stuart)

Signed-off-by: default avatarMatthew Brost <matthew.brost@intel.com>
Reviewed-by: default avatarMatt Atwood <matthew.s.atwood@intel.com>
Reviewed-by: default avatarStuart Summers <stuart.summers@intel.com>
Tested-by: default avatarStuart Summers <stuart.summers@intel.com>
Link: https://patch.msgid.link/20260116221731.868657-5-matthew.brost@intel.com
parent dea333b2

drivers/gpu/drm/xe/xe_device.c

+25 −0
Original line number Diff line number Diff line
@@ -1375,3 +1375,28 @@ const char *xe_wedged_mode_to_string(enum xe_wedged_mode mode) 
		return "<invalid>";

	}

}



/**

 * xe_device_asid_to_vm() - Find VM from ASID

 * @xe: the &xe_device

 * @asid: Address space ID

 *

 * Find a VM from ASID and take a reference to VM which caller must drop.

 * Reclaim safe.

 *

 * Return: VM on success, ERR_PTR on failure

 */

struct xe_vm *xe_device_asid_to_vm(struct xe_device *xe, u32 asid)

{

	struct xe_vm *vm;



	down_read(&xe->usm.lock);

	vm = xa_load(&xe->usm.asid_to_vm, asid);

	if (vm)

		xe_vm_get(vm);

	else

		vm = ERR_PTR(-EINVAL);

	up_read(&xe->usm.lock);



	return vm;

}

drivers/gpu/drm/xe/xe_device.h

+4 −0
Original line number Diff line number Diff line
@@ -12,6 +12,8 @@ 
#include "xe_gt_types.h"

#include "xe_sriov.h"



struct xe_vm;



static inline struct xe_device *to_xe_device(const struct drm_device *dev)

{

	return container_of(dev, struct xe_device, drm);
@@ -204,6 +206,8 @@ int xe_is_injection_active(void); 


bool xe_is_xe_file(const struct file *file);



struct xe_vm *xe_device_asid_to_vm(struct xe_device *xe, u32 asid);



/*

 * Occasionally it is seen that the G2H worker starts running after a delay of more than

 * a second even after being queued and activated by the Linux workqueue subsystem. This