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rodrigovivijunxiaoc
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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>
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drivers/gpu/drm/xe/xe_guc_debugfs.c

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Original file line numberDiff line numberDiff line change
@@ -13,6 +13,7 @@
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#include "xe_guc.h"
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#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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@@ -60,10 +61,24 @@ static int guc_ctb(struct seq_file *m, void *data)
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return 0;
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}
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static int guc_pc(struct seq_file *m, void *data)
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{
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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);
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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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return 0;
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}
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static const struct drm_info_list debugfs_list[] = {
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{"guc_info", guc_info, 0},
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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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};
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void xe_guc_debugfs_register(struct xe_guc *guc, struct dentry *parent)

drivers/gpu/drm/xe/xe_guc_pc.c

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

drivers/gpu/drm/xe/xe_guc_pc.h

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Original file line numberDiff line numberDiff line change
@@ -10,13 +10,15 @@
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struct xe_guc_pc;
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enum slpc_gucrc_mode;
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struct drm_printer;
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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_stop(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);
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void xe_guc_pc_print(struct xe_guc_pc *pc, struct drm_printer *p);
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u32 xe_guc_pc_get_act_freq(struct xe_guc_pc *pc);
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int xe_guc_pc_get_cur_freq(struct xe_guc_pc *pc, u32 *freq);

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