Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/xe: Introduce GuC PC debugfs
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>
+76
+15
drivers/gpu/drm/xe/xe_guc_debugfs.c
+15
drivers/gpu/drm/xe/xe_guc_debugfs.c
···
13
13
#include "xe_guc.h"
14
14
#include "xe_guc_ct.h"
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#include "xe_guc_log.h"
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+
#include "xe_guc_pc.h"
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#include "xe_macros.h"
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#include "xe_pm.h"
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19
···
61
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return 0;
62
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}
63
62
63
+
static int guc_pc(struct seq_file *m, void *data)
64
+
{
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struct xe_guc *guc = node_to_guc(m->private);
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struct xe_device *xe = guc_to_xe(guc);
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struct drm_printer p = drm_seq_file_printer(m);
68
+
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xe_pm_runtime_get(xe);
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xe_guc_pc_print(&guc->pc, &p);
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xe_pm_runtime_put(xe);
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+
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return 0;
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}
75
+
64
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static const struct drm_info_list debugfs_list[] = {
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{"guc_info", guc_info, 0},
66
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{"guc_log", guc_log, 0},
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{"guc_ctb", guc_ctb, 0},
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+
{"guc_pc", guc_pc, 0},
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81
};
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void xe_guc_debugfs_register(struct xe_guc *guc, struct dentry *parent)
+59
drivers/gpu/drm/xe/xe_guc_pc.c
+59
drivers/gpu/drm/xe/xe_guc_pc.c
···
8
8
#include <linux/delay.h>
9
9
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#include <drm/drm_managed.h>
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+
#include <drm/drm_print.h>
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#include <generated/xe_wa_oob.h>
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#include "abi/guc_actions_slpc_abi.h"
···
1131
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pc->bo = bo;
1132
1131
1133
1132
return devm_add_action_or_reset(xe->drm.dev, xe_guc_pc_fini_hw, pc);
1133
+
}
1134
+
1135
+
static const char *pc_get_state_string(struct xe_guc_pc *pc)
1136
+
{
1137
+
switch (slpc_shared_data_read(pc, header.global_state)) {
1138
+
case SLPC_GLOBAL_STATE_NOT_RUNNING:
1139
+
return "not running";
1140
+
case SLPC_GLOBAL_STATE_INITIALIZING:
1141
+
return "initializing";
1142
+
case SLPC_GLOBAL_STATE_RESETTING:
1143
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return "resetting";
1144
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case SLPC_GLOBAL_STATE_RUNNING:
1145
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return "running";
1146
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case SLPC_GLOBAL_STATE_SHUTTING_DOWN:
1147
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return "shutting down";
1148
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case SLPC_GLOBAL_STATE_ERROR:
1149
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return "error";
1150
+
default:
1151
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return "unknown";
1152
+
}
1153
+
}
1154
+
1155
+
/**
1156
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* xe_guc_pc_print - Print GuC's Power Conservation information for debug
1157
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* @pc: Xe_GuC_PC instance
1158
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* @p: drm_printer
1159
+
*/
1160
+
void xe_guc_pc_print(struct xe_guc_pc *pc, struct drm_printer *p)
1161
+
{
1162
+
drm_printf(p, "SLPC Shared Data Header:\n");
1163
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drm_printf(p, "\tSize: %x\n", slpc_shared_data_read(pc, header.size));
1164
+
drm_printf(p, "\tGlobal State: %s\n", pc_get_state_string(pc));
1165
+
1166
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if (pc_action_query_task_state(pc))
1167
+
return;
1168
+
1169
+
drm_printf(p, "\nSLPC Tasks Status:\n");
1170
+
drm_printf(p, "\tGTPERF enabled: %s\n",
1171
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str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
1172
+
SLPC_GTPERF_TASK_ENABLED));
1173
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drm_printf(p, "\tDCC enabled: %s\n",
1174
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str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
1175
+
SLPC_DCC_TASK_ENABLED));
1176
+
drm_printf(p, "\tDCC in use: %s\n",
1177
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str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
1178
+
SLPC_IN_DCC));
1179
+
drm_printf(p, "\tBalancer enabled: %s\n",
1180
+
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
1181
+
SLPC_BALANCER_ENABLED));
1182
+
drm_printf(p, "\tIBC enabled: %s\n",
1183
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str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
1184
+
SLPC_IBC_TASK_ENABLED));
1185
+
drm_printf(p, "\tBalancer IA LMT enabled: %s\n",
1186
+
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
1187
+
SLPC_BALANCER_IA_LMT_ENABLED));
1188
+
drm_printf(p, "\tBalancer IA LMT active: %s\n",
1189
+
str_yes_no(slpc_shared_data_read(pc, task_state_data.status) &
1190
+
SLPC_BALANCER_IA_LMT_ACTIVE));
1134
1191
}
+2
drivers/gpu/drm/xe/xe_guc_pc.h
+2
drivers/gpu/drm/xe/xe_guc_pc.h
···
10
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11
11
struct xe_guc_pc;
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enum slpc_gucrc_mode;
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struct drm_printer;
13
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int xe_guc_pc_init(struct xe_guc_pc *pc);
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int xe_guc_pc_start(struct xe_guc_pc *pc);
···
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int xe_guc_pc_gucrc_disable(struct xe_guc_pc *pc);
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int xe_guc_pc_override_gucrc_mode(struct xe_guc_pc *pc, enum slpc_gucrc_mode mode);
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int xe_guc_pc_unset_gucrc_mode(struct xe_guc_pc *pc);
20
+
void xe_guc_pc_print(struct xe_guc_pc *pc, struct drm_printer *p);
21
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u32 xe_guc_pc_get_act_freq(struct xe_guc_pc *pc);
23
23
int xe_guc_pc_get_cur_freq(struct xe_guc_pc *pc, u32 *freq);