[PATCH v2 1/7] drm/xe/psmi: Add GuC flag to enable PSMI

[Lucas De Marchi]

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 at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: John Harrison <John.C.Harrison at Intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/xe/xe_configfs.h | 2 ++
 drivers/gpu/drm/xe/xe_guc.c      | 7 ++++++-
 drivers/gpu/drm/xe/xe_guc_fwif.h | 1 +
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_configfs.h b/drivers/gpu/drm/xe/xe_configfs.h
index fb87640080896..c14588b86e833 100644
--- a/drivers/gpu/drm/xe/xe_configfs.h
+++ b/drivers/gpu/drm/xe/xe_configfs.h
@@ -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
diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index b1d1d6da37581..88dab4724c510 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -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;
+
 	return flags;
 }
 
diff --git a/drivers/gpu/drm/xe/xe_guc_fwif.h b/drivers/gpu/drm/xe/xe_guc_fwif.h
index ca9f999d38d1e..4dc000c977faf 100644
--- a/drivers/gpu/drm/xe/xe_guc_fwif.h
+++ b/drivers/gpu/drm/xe/xe_guc_fwif.h
@@ -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		BIT(7)
 #define   GUC_CTL_DISABLE_SCHEDULER	BIT(14)
 
 #define GUC_CTL_DEBUG			3

-- 
2.50.1