Commit ecab82af authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

drm/xe/vf: Don't support gtidle if VF 



VF drivers can't access any of gtidle control registers as this
functionality is owned by the PF driver.

Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240619214557.905-7-michal.wajdeczko@intel.com
parent 5aa326f5

drivers/gpu/drm/xe/xe_gt_idle.c

+16 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include "xe_macros.h"

#include "xe_mmio.h"

#include "xe_pm.h"

#include "xe_sriov.h"



/**

 * DOC: Xe GT Idle
@@ -100,6 +101,9 @@ void xe_gt_idle_enable_pg(struct xe_gt *gt) 
	u32 pg_enable;

	int i, j;



	if (IS_SRIOV_VF(xe))

		return;



	/* Disable CPG for PVC */

	if (xe->info.platform == XE_PVC)

		return;
@@ -130,6 +134,9 @@ void xe_gt_idle_enable_pg(struct xe_gt *gt) 


void xe_gt_idle_disable_pg(struct xe_gt *gt)

{

	if (IS_SRIOV_VF(gt_to_xe(gt)))

		return;



	xe_device_assert_mem_access(gt_to_xe(gt));

	XE_WARN_ON(xe_force_wake_get(gt_to_fw(gt), XE_FW_GT));
@@ -214,6 +221,9 @@ int xe_gt_idle_init(struct xe_gt_idle *gtidle) 
	struct kobject *kobj;

	int err;



	if (IS_SRIOV_VF(xe))

		return 0;



	kobj = kobject_create_and_add("gtidle", gt->sysfs);

	if (!kobj)

		return -ENOMEM;
@@ -246,6 +256,9 @@ void xe_gt_idle_enable_c6(struct xe_gt *gt) 
	xe_device_assert_mem_access(gt_to_xe(gt));

	xe_force_wake_assert_held(gt_to_fw(gt), XE_FW_GT);



	if (IS_SRIOV_VF(gt_to_xe(gt)))

		return;



	/* Units of 1280 ns for a total of 5s */

	xe_mmio_write32(gt, RC_IDLE_HYSTERSIS, 0x3B9ACA);

	/* Enable RC6 */
@@ -258,6 +271,9 @@ void xe_gt_idle_disable_c6(struct xe_gt *gt) 
	xe_device_assert_mem_access(gt_to_xe(gt));

	xe_force_wake_assert_held(gt_to_fw(gt), XE_FW_GT);



	if (IS_SRIOV_VF(gt_to_xe(gt)))

		return;



	xe_mmio_write32(gt, RC_CONTROL, 0);

	xe_mmio_write32(gt, RC_STATE, 0);

}