[PATCH 1/4] drm/xe/psmi: Add setting of PSMI feature flag

[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.

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>
Original-author: Brian Welty <brian.welty at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/xe/xe_guc.c      | 3 +++
 drivers/gpu/drm/xe/xe_guc_fwif.h | 1 +
 drivers/gpu/drm/xe/xe_module.c   | 3 +++
 drivers/gpu/drm/xe/xe_module.h   | 1 +
 4 files changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index b1d1d6da37581..a117300501247 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -86,6 +86,9 @@ static u32 guc_ctl_feature_flags(struct xe_guc *guc)
 	if (!guc_to_xe(guc)->info.skip_guc_pc)
 		flags |= GUC_CTL_ENABLE_SLPC;
 
+	if (xe_modparam.enable_psmi)
+		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 6f57578b07cb0..2a5256c24b9d8 100644
--- a/drivers/gpu/drm/xe/xe_guc_fwif.h
+++ b/drivers/gpu/drm/xe/xe_guc_fwif.h
@@ -107,6 +107,7 @@ 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
diff --git a/drivers/gpu/drm/xe/xe_module.c b/drivers/gpu/drm/xe/xe_module.c
index 064093bf1adca..2e6ac082f7bee 100644
--- a/drivers/gpu/drm/xe/xe_module.c
+++ b/drivers/gpu/drm/xe/xe_module.c
@@ -57,6 +57,9 @@ module_param_named(probe_display, xe_modparam.probe_display, bool, 0444);
 MODULE_PARM_DESC(probe_display, "Probe display HW, otherwise it's left untouched "
 		 "[default=" __stringify(DEFAULT_PROBE_DISPLAY) "])");
 
+module_param_named(enable_psmi, xe_modparam.enable_psmi, bool, 0444);
+MODULE_PARM_DESC(enable_psmi, "Enable PSMI capture support");
+
 module_param_named(vram_bar_size, xe_modparam.force_vram_bar_size, int, 0600);
 MODULE_PARM_DESC(vram_bar_size, "Set the vram bar size in MiB (<0=disable-resize, 0=max-needed-size, >0=force-size "
 		 "[default=" __stringify(DEFAULT_VRAM_BAR_SIZE) "])");
diff --git a/drivers/gpu/drm/xe/xe_module.h b/drivers/gpu/drm/xe/xe_module.h
index 5a3bfea8b7b4c..a84af8eccb91d 100644
--- a/drivers/gpu/drm/xe/xe_module.h
+++ b/drivers/gpu/drm/xe/xe_module.h
@@ -12,6 +12,7 @@
 struct xe_modparam {
 	bool force_execlist;
 	bool probe_display;
+	bool enable_psmi;
 	u32 force_vram_bar_size;
 	int guc_log_level;
 	char *guc_firmware_path;

-- 
2.49.0