drm/xe: Runtime PM wake on every debugfs call

Let's ensure our PCI device is awaken on every debugfs call.
Let's increase the runtime_pm protection and start moving
that to the outer bounds.

Also let's remove the mem_access_{get,put} from where they are
not needed anymore.
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240222163937.138342-7-rodrigo.vivi@intel.com

drivers/gpu/drm/xe/xe_debugfs.c

@@ -12,6 +12,7 @@
 #include "xe_bo.h"
 #include "xe_device.h"
 #include "xe_gt_debugfs.h"
+#include "xe_pm.h"
 #include "xe_step.h"
 
 #ifdef CONFIG_DRM_XE_DEBUG
@@ -37,6 +38,8 @@ static int info(struct seq_file *m, void *data)
 	struct xe_gt *gt;
 	u8 id;
 
+	xe_pm_runtime_get(xe);
+
 	drm_printf(&p, "graphics_verx100 %d\n", xe->info.graphics_verx100);
 	drm_printf(&p, "media_verx100 %d\n", xe->info.media_verx100);
 	drm_printf(&p, "stepping G:%s M:%s D:%s B:%s\n",
@@ -63,6 +66,7 @@ static int info(struct seq_file *m, void *data)
 			   gt->info.engine_mask);
 	}
 
+	xe_pm_runtime_put(xe);
 	return 0;
 }
 
@@ -76,8 +80,7 @@ static int forcewake_open(struct inode *inode, struct file *file)
 	struct xe_gt *gt;
 	u8 id;
 
-	xe_device_mem_access_get(xe);
-
+	xe_pm_runtime_get(xe);
 	for_each_gt(gt, xe, id)
 		XE_WARN_ON(xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL));
 
@@ -92,8 +95,7 @@ static int forcewake_release(struct inode *inode, struct file *file)
 
 	for_each_gt(gt, xe, id)
 		XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL));
-
-	xe_device_mem_access_put(xe);
+	xe_pm_runtime_put(xe);
 
 	return 0;
 }

drivers/gpu/drm/xe/xe_gt_debugfs.c

@@ -18,6 +18,7 @@
 #include "xe_lrc.h"
 #include "xe_macros.h"
 #include "xe_pat.h"
+#include "xe_pm.h"
 #include "xe_reg_sr.h"
 #include "xe_reg_whitelist.h"
 #include "xe_uc_debugfs.h"
@@ -37,10 +38,10 @@ static int hw_engines(struct seq_file *m, void *data)
 	enum xe_hw_engine_id id;
 	int err;
 
-	xe_device_mem_access_get(xe);
+	xe_pm_runtime_get(xe);
 	err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
 	if (err) {
-		xe_device_mem_access_put(xe);
+		xe_pm_runtime_put(xe);
 		return err;
 	}
 
@@ -48,7 +49,7 @@ static int hw_engines(struct seq_file *m, void *data)
 		xe_hw_engine_print(hwe, &p);
 
 	err = xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
-	xe_device_mem_access_put(xe);
+	xe_pm_runtime_put(xe);
 	if (err)
 		return err;
 
@@ -59,18 +60,23 @@ static int force_reset(struct seq_file *m, void *data)
 {
 	struct xe_gt *gt = node_to_gt(m->private);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_gt_reset_async(gt);
+	xe_pm_runtime_put(gt_to_xe(gt));
 
 	return 0;
 }
 
 static int sa_info(struct seq_file *m, void *data)
 {
-	struct xe_tile *tile = gt_to_tile(node_to_gt(m->private));
+	struct xe_gt *gt = node_to_gt(m->private);
+	struct xe_tile *tile = gt_to_tile(gt);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	drm_suballoc_dump_debug_info(&tile->mem.kernel_bb_pool->base, &p,
 				     tile->mem.kernel_bb_pool->gpu_addr);
+	xe_pm_runtime_put(gt_to_xe(gt));
 
 	return 0;
 }
@@ -80,7 +86,9 @@ static int topology(struct seq_file *m, void *data)
 	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_gt_topology_dump(gt, &p);
+	xe_pm_runtime_put(gt_to_xe(gt));
 
 	return 0;
 }
@@ -90,7 +98,9 @@ static int steering(struct seq_file *m, void *data)
 	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_gt_mcr_steering_dump(gt, &p);
+	xe_pm_runtime_put(gt_to_xe(gt));
 
 	return 0;
 }
@@ -99,8 +109,13 @@ static int ggtt(struct seq_file *m, void *data)
 {
 	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
+	int ret;
+
+	xe_pm_runtime_get(gt_to_xe(gt));
+	ret = xe_ggtt_dump(gt_to_tile(gt)->mem.ggtt, &p);
+	xe_pm_runtime_put(gt_to_xe(gt));
 
-	return xe_ggtt_dump(gt_to_tile(gt)->mem.ggtt, &p);
+	return ret;
 }
 
 static int register_save_restore(struct seq_file *m, void *data)
@@ -110,6 +125,8 @@ static int register_save_restore(struct seq_file *m, void *data)
 	struct xe_hw_engine *hwe;
 	enum xe_hw_engine_id id;
 
+	xe_pm_runtime_get(gt_to_xe(gt));
+
 	xe_reg_sr_dump(&gt->reg_sr, &p);
 	drm_printf(&p, "\n");
 
@@ -127,6 +144,8 @@ static int register_save_restore(struct seq_file *m, void *data)
 	for_each_hw_engine(hwe, gt, id)
 		xe_reg_whitelist_dump(&hwe->reg_whitelist, &p);
 
+	xe_pm_runtime_put(gt_to_xe(gt));
+
 	return 0;
 }
 
@@ -135,7 +154,9 @@ static int workarounds(struct seq_file *m, void *data)
 	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_wa_dump(gt, &p);
+	xe_pm_runtime_put(gt_to_xe(gt));
 
 	return 0;
 }
@@ -145,48 +166,70 @@ static int pat(struct seq_file *m, void *data)
 	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_pat_dump(gt, &p);
+	xe_pm_runtime_put(gt_to_xe(gt));
 
 	return 0;
 }
 
 static int rcs_default_lrc(struct seq_file *m, void *data)
 {
+	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_lrc_dump_default(&p, node_to_gt(m->private), XE_ENGINE_CLASS_RENDER);
+	xe_pm_runtime_put(gt_to_xe(gt));
+
 	return 0;
 }
 
 static int ccs_default_lrc(struct seq_file *m, void *data)
 {
+	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_lrc_dump_default(&p, node_to_gt(m->private), XE_ENGINE_CLASS_COMPUTE);
+	xe_pm_runtime_put(gt_to_xe(gt));
+
 	return 0;
 }
 
 static int bcs_default_lrc(struct seq_file *m, void *data)
 {
+	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_lrc_dump_default(&p, node_to_gt(m->private), XE_ENGINE_CLASS_COPY);
+	xe_pm_runtime_put(gt_to_xe(gt));
+
 	return 0;
 }
 
 static int vcs_default_lrc(struct seq_file *m, void *data)
 {
+	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_lrc_dump_default(&p, node_to_gt(m->private), XE_ENGINE_CLASS_VIDEO_DECODE);
+	xe_pm_runtime_put(gt_to_xe(gt));
+
 	return 0;
 }
 
 static int vecs_default_lrc(struct seq_file *m, void *data)
 {
+	struct xe_gt *gt = node_to_gt(m->private);
 	struct drm_printer p = drm_seq_file_printer(m);
 
+	xe_pm_runtime_get(gt_to_xe(gt));
 	xe_lrc_dump_default(&p, node_to_gt(m->private), XE_ENGINE_CLASS_VIDEO_ENHANCE);
+	xe_pm_runtime_put(gt_to_xe(gt));
+
 	return 0;
 }
 

drivers/gpu/drm/xe/xe_guc_debugfs.c

@@ -14,6 +14,7 @@
 #include "xe_guc_ct.h"
 #include "xe_guc_log.h"
 #include "xe_macros.h"
+#include "xe_pm.h"
 
 static struct xe_guc *node_to_guc(struct drm_info_node *node)
 {
@@ -26,9 +27,9 @@ static int guc_info(struct seq_file *m, void *data)
 	struct xe_device *xe = guc_to_xe(guc);
 	struct drm_printer p = drm_seq_file_printer(m);
 
-	xe_device_mem_access_get(xe);
+	xe_pm_runtime_get(xe);
 	xe_guc_print_info(guc, &p);
-	xe_device_mem_access_put(xe);
+	xe_pm_runtime_put(xe);
 
 	return 0;
 }
@@ -39,9 +40,9 @@ static int guc_log(struct seq_file *m, void *data)
 	struct xe_device *xe = guc_to_xe(guc);
 	struct drm_printer p = drm_seq_file_printer(m);
 
-	xe_device_mem_access_get(xe);
+	xe_pm_runtime_get(xe);
 	xe_guc_log_print(&guc->log, &p);
-	xe_device_mem_access_put(xe);
+	xe_pm_runtime_put(xe);
 
 	return 0;
 }

drivers/gpu/drm/xe/xe_huc_debugfs.c

@@ -12,6 +12,7 @@
 #include "xe_gt.h"
 #include "xe_huc.h"
 #include "xe_macros.h"
+#include "xe_pm.h"
 
 static struct xe_gt *
 huc_to_gt(struct xe_huc *huc)
@@ -36,9 +37,9 @@ static int huc_info(struct seq_file *m, void *data)
 	struct xe_device *xe = huc_to_xe(huc);
 	struct drm_printer p = drm_seq_file_printer(m);
 
-	xe_device_mem_access_get(xe);
+	xe_pm_runtime_get(xe);
 	xe_huc_print_info(huc, &p);
-	xe_device_mem_access_put(xe);
+	xe_pm_runtime_put(xe);
 
 	return 0;
 }

drivers/gpu/drm/xe/xe_ttm_sys_mgr.c

@@ -73,7 +73,10 @@ static void xe_ttm_sys_mgr_del(struct ttm_resource_manager *man,
 static void xe_ttm_sys_mgr_debug(struct ttm_resource_manager *man,
 				 struct drm_printer *printer)
 {
-
+	/*
+	 * This function is called by debugfs entry and would require
+	 * pm_runtime_{get,put} wrappers around any operation.
+	 */
 }
 
 static const struct ttm_resource_manager_func xe_ttm_sys_mgr_func = {