Commit f1928ac2 authored by Vinay Belgaumkar's avatar Vinay Belgaumkar Committed by John Harrison
Browse files

drm/i915/guc/slpc: Add debugfs for SLPC info 



This prints out relevant SLPC info from the SLPC shared structure.

We will send a H2G message which forces SLPC to update the
shared data structure with latest information before reading it.

v2: Address review comments (Michal W)
v3: Remove unnecessary tasks from slpc_info (Michal W)
v4: Rename function to intel_guc_slpc_print_info() (Michal W)
v5: checkpatch()

Reviewed-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: default avatarVinay Belgaumkar <vinay.belgaumkar@intel.com>
Signed-off-by: default avatarSundaresan Sujaritha <sujaritha.sundaresan@intel.com>
Signed-off-by: default avatarJohn Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730202119.23810-10-vinay.belgaumkar@intel.com
parent c279bec1

drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c

+22 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include "gt/uc/intel_guc_ct.h"

#include "gt/uc/intel_guc_ads.h"

#include "gt/uc/intel_guc_submission.h"

#include "gt/uc/intel_guc_slpc.h"



static int guc_info_show(struct seq_file *m, void *data)

{
@@ -50,11 +51,32 @@ static int guc_registered_contexts_show(struct seq_file *m, void *data) 
}

DEFINE_GT_DEBUGFS_ATTRIBUTE(guc_registered_contexts);



static int guc_slpc_info_show(struct seq_file *m, void *unused)

{

	struct intel_guc *guc = m->private;

	struct intel_guc_slpc *slpc = &guc->slpc;

	struct drm_printer p = drm_seq_file_printer(m);



	if (!intel_guc_slpc_is_used(guc))

		return -ENODEV;



	return intel_guc_slpc_print_info(slpc, &p);

}

DEFINE_GT_DEBUGFS_ATTRIBUTE(guc_slpc_info);



static bool intel_eval_slpc_support(void *data)

{

	struct intel_guc *guc = (struct intel_guc *)data;



	return intel_guc_slpc_is_used(guc);

}



void intel_guc_debugfs_register(struct intel_guc *guc, struct dentry *root)

{

	static const struct debugfs_gt_file files[] = {

		{ "guc_info", &guc_info_fops, NULL },

		{ "guc_registered_contexts", &guc_registered_contexts_fops, NULL },

		{ "guc_slpc_info", &guc_slpc_info_fops, &intel_eval_slpc_support},

	};



	if (!intel_guc_is_supported(guc))

drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c

+29 −0
Original line number Diff line number Diff line
@@ -432,6 +432,35 @@ int intel_guc_slpc_enable(struct intel_guc_slpc *slpc) 
	return 0;

}



int intel_guc_slpc_print_info(struct intel_guc_slpc *slpc, struct drm_printer *p)

{

	struct drm_i915_private *i915 = slpc_to_i915(slpc);

	struct slpc_shared_data *data = slpc->vaddr;

	struct slpc_task_state_data *slpc_tasks;

	intel_wakeref_t wakeref;

	int ret = 0;



	GEM_BUG_ON(!slpc->vma);



	with_intel_runtime_pm(&i915->runtime_pm, wakeref) {

		ret = slpc_query_task_state(slpc);



		if (!ret) {

			slpc_tasks = &data->task_state_data;



			drm_printf(p, "\tSLPC state: %s\n", slpc_get_state_string(slpc));

			drm_printf(p, "\tGTPERF task active: %s\n",

				   yesno(slpc_tasks->status & SLPC_GTPERF_TASK_ENABLED));

			drm_printf(p, "\tMax freq: %u MHz\n",

				   slpc_decode_max_freq(slpc));

			drm_printf(p, "\tMin freq: %u MHz\n",

				   slpc_decode_min_freq(slpc));

		}

	}



	return ret;

}



void intel_guc_slpc_fini(struct intel_guc_slpc *slpc)

{

	if (!slpc->vma)

drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h

+3 −0
Original line number Diff line number Diff line
@@ -9,6 +9,8 @@ 
#include "intel_guc_submission.h"

#include "intel_guc_slpc_types.h"



struct drm_printer;



static inline bool intel_guc_slpc_is_supported(struct intel_guc *guc)

{

	return guc->slpc.supported;
@@ -33,5 +35,6 @@ int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val); 
int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val);

int intel_guc_slpc_get_max_freq(struct intel_guc_slpc *slpc, u32 *val);

int intel_guc_slpc_get_min_freq(struct intel_guc_slpc *slpc, u32 *val);

int intel_guc_slpc_print_info(struct intel_guc_slpc *slpc, struct drm_printer *p);



#endif