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drm/xe: Introduce GuC PC debugfs

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Allows the visualization of the current GuC power conservation
status and policies.

v2: Fix DCC msg (Vinay)
v3: Simplify pc_get_state_string (Jonathan)

Reviewed-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250115145053.1142023-1-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Rodrigo Vivi 2025-01-15 09:50:52 -05:00
parent 0af944f0e3
commit aaab5404b1
No known key found for this signature in database
GPG Key ID: FA625F640EEB13CA
3 changed files with 76 additions and 0 deletions
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15
drivers/gpu/drm/xe/xe_guc_debugfs.c
View File

@ -13,6 +13,7 @@
#include "xe_guc.h"
#include "xe_guc_ct.h"
#include "xe_guc_log.h"
#include "xe_guc_pc.h"
#include "xe_macros.h"
#include "xe_pm.h"
@ -60,10 +61,24 @@ static int guc_ctb(struct seq_file *m, void *data)
return 0;
}
static int guc_pc(struct seq_file *m, void *data)
{
struct xe_guc *guc = node_to_guc(m->private);
struct xe_device *xe = guc_to_xe(guc);
struct drm_printer p = drm_seq_file_printer(m);
xe_pm_runtime_get(xe);
xe_guc_pc_print(&guc->pc, &p);
xe_pm_runtime_put(xe);
return 0;
}
static const struct drm_info_list debugfs_list[] = {
{"guc_info", guc_info, 0},
{"guc_log", guc_log, 0},
{"guc_ctb", guc_ctb, 0},
{"guc_pc", guc_pc, 0},
};
void xe_guc_debugfs_register(struct xe_guc *guc, struct dentry *parent)

59
drivers/gpu/drm/xe/xe_guc_pc.c
View File

@ -8,6 +8,7 @@
#include <linux/delay.h>
#include <drm/drm_managed.h>
#include <drm/drm_print.h>
#include <generated/xe_wa_oob.h>
#include "abi/guc_actions_slpc_abi.h"
@ -1131,3 +1132,61 @@ int xe_guc_pc_init(struct xe_guc_pc *pc)
return devm_add_action_or_reset(xe->drm.dev, xe_guc_pc_fini_hw, pc);
}
static const char *pc_get_state_string(struct xe_guc_pc *pc)
{
switch (slpc_shared_data_read(pc, header.global_state)) {
case SLPC_GLOBAL_STATE_NOT_RUNNING:
return "not running";
case SLPC_GLOBAL_STATE_INITIALIZING:
return "initializing";
case SLPC_GLOBAL_STATE_RESETTING:
return "resetting";
case SLPC_GLOBAL_STATE_RUNNING:
return "running";
case SLPC_GLOBAL_STATE_SHUTTING_DOWN:
return "shutting down";
case SLPC_GLOBAL_STATE_ERROR:
return "error";
default:
return "unknown";
}
}
/**
* xe_guc_pc_print - Print GuC's Power Conservation information for debug
* @pc: Xe_GuC_PC instance
* @p: drm_printer
*/
void xe_guc_pc_print(struct xe_guc_pc *pc, struct drm_printer *p)
{
drm_printf(p, "SLPC Shared Data Header:\n");
drm_printf(p, "\tSize: %x\n", slpc_shared_data_read(pc, header.size));
drm_printf(p, "\tGlobal State: %s\n", pc_get_state_string(pc));
if (pc_action_query_task_state(pc))
return;
drm_printf(p, "\nSLPC Tasks Status:\n");
drm_printf(p, "\tGTPERF enabled: %s\n",
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
SLPC_GTPERF_TASK_ENABLED));
drm_printf(p, "\tDCC enabled: %s\n",
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
SLPC_DCC_TASK_ENABLED));
drm_printf(p, "\tDCC in use: %s\n",
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
SLPC_IN_DCC));
drm_printf(p, "\tBalancer enabled: %s\n",
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
SLPC_BALANCER_ENABLED));
drm_printf(p, "\tIBC enabled: %s\n",
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
SLPC_IBC_TASK_ENABLED));
drm_printf(p, "\tBalancer IA LMT enabled: %s\n",
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
SLPC_BALANCER_IA_LMT_ENABLED));
drm_printf(p, "\tBalancer IA LMT active: %s\n",
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
SLPC_BALANCER_IA_LMT_ACTIVE));
}

2
drivers/gpu/drm/xe/xe_guc_pc.h
View File

@ -10,6 +10,7 @@
struct xe_guc_pc;
enum slpc_gucrc_mode;
struct drm_printer;
int xe_guc_pc_init(struct xe_guc_pc *pc);
int xe_guc_pc_start(struct xe_guc_pc *pc);
@ -17,6 +18,7 @@ int xe_guc_pc_stop(struct xe_guc_pc *pc);
int xe_guc_pc_gucrc_disable(struct xe_guc_pc *pc);
int xe_guc_pc_override_gucrc_mode(struct xe_guc_pc *pc, enum slpc_gucrc_mode mode);
int xe_guc_pc_unset_gucrc_mode(struct xe_guc_pc *pc);
void xe_guc_pc_print(struct xe_guc_pc *pc, struct drm_printer *p);
u32 xe_guc_pc_get_act_freq(struct xe_guc_pc *pc);
int xe_guc_pc_get_cur_freq(struct xe_guc_pc *pc, u32 *freq);