Commit efeb036f authored by Lucas De Marchi's avatar Lucas De Marchi
Browse files

drm/xe/psmi: Add GuC flag to enable PSMI 



PSMI allows to capture data from the GPU useful for early
validation. From the kernel side there isn't much to be done, just a few
things:

	1) Toggle the feature support in GuC
	2) Enable some additional WAs
	3) Allocate buffers

Here is the first step, with the next ones to follow. For now everything
is disabled through a check in configfs that is currently hardcoded to
disabled.

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: default avatarVinay Belgaumkar <vinay.belgaumkar@intel.com>
Link: https://lore.kernel.org/r/20250821-psmi-v5-1-34ab7550d3d8@intel.com


Signed-off-by: default avatarLucas De Marchi <lucas.demarchi@intel.com>
parent 2515d2b9

drivers/gpu/drm/xe/xe_configfs.h

+2 −0
Original line number Diff line number Diff line
@@ -16,12 +16,14 @@ void xe_configfs_exit(void); 
bool xe_configfs_get_survivability_mode(struct pci_dev *pdev);

void xe_configfs_clear_survivability_mode(struct pci_dev *pdev);

u64 xe_configfs_get_engines_allowed(struct pci_dev *pdev);

static inline bool xe_configfs_get_psmi_enabled(struct pci_dev *pdev) { return false; }

#else

static inline int xe_configfs_init(void) { return 0; }

static inline void xe_configfs_exit(void) { }

static inline bool xe_configfs_get_survivability_mode(struct pci_dev *pdev) { return false; }

static inline void xe_configfs_clear_survivability_mode(struct pci_dev *pdev) { }

static inline u64 xe_configfs_get_engines_allowed(struct pci_dev *pdev) { return U64_MAX; }

static inline bool xe_configfs_get_psmi_enabled(struct pci_dev *pdev) { return false; }

#endif



#endif

drivers/gpu/drm/xe/xe_guc.c

+6 −1
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include "regs/xe_guc_regs.h"

#include "regs/xe_irq_regs.h"

#include "xe_bo.h"

#include "xe_configfs.h"

#include "xe_device.h"

#include "xe_force_wake.h"

#include "xe_gt.h"
@@ -81,11 +82,15 @@ static u32 guc_ctl_debug_flags(struct xe_guc *guc) 


static u32 guc_ctl_feature_flags(struct xe_guc *guc)

{

	struct xe_device *xe = guc_to_xe(guc);

	u32 flags = GUC_CTL_ENABLE_LITE_RESTORE;



	if (!guc_to_xe(guc)->info.skip_guc_pc)

	if (!xe->info.skip_guc_pc)

		flags |= GUC_CTL_ENABLE_SLPC;



	if (xe_configfs_get_psmi_enabled(to_pci_dev(xe->drm.dev)))

		flags |= GUC_CTL_ENABLE_PSMI_LOGGING;



	return flags;

}

drivers/gpu/drm/xe/xe_guc_fwif.h

+1 −0
Original line number Diff line number Diff line
@@ -112,6 +112,7 @@ struct guc_update_exec_queue_policy { 
#define GUC_CTL_FEATURE			2

#define   GUC_CTL_ENABLE_SLPC		BIT(2)

#define   GUC_CTL_ENABLE_LITE_RESTORE	BIT(4)

#define   GUC_CTL_ENABLE_PSMI_LOGGING	BIT(7)

#define   GUC_CTL_DISABLE_SCHEDULER	BIT(14)



#define GUC_CTL_DEBUG			3