drivers/gpu/drm/xe/xe_guc_debugfs.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/xe/xe_guc_debugfs.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/xe/xe_guc_debugfs.c
Extension
.c
Size
4440 bytes
Lines
149
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2022 Intel Corporation
 */

#include "xe_guc_debugfs.h"

#include <drm/drm_debugfs.h>
#include <drm/drm_managed.h>

#include "xe_device_types.h"
#include "xe_gt_types.h"
#include "xe_guc.h"
#include "xe_guc_ct.h"
#include "xe_guc_log.h"
#include "xe_guc_pc.h"
#include "xe_pm.h"

/*
 * guc_debugfs_show - A show callback for struct drm_info_list
 * @m: the &seq_file
 * @data: data used by the drm debugfs helpers
 *
 * This callback can be used in struct drm_info_list to describe debugfs
 * files that are &xe_guc specific in similar way how we handle &xe_gt
 * specific files using &xe_gt_debugfs_simple_show.
 *
 * It is assumed that those debugfs files will be created on directory entry
 * which grandparent struct dentry d_inode->i_private points to &xe_gt.
 *
 *      /sys/kernel/debug/dri/0/
 *      ├── gt0			# dent->d_parent->d_parent (d_inode->i_private == gt)
 *      │   ├── uc		# dent->d_parent
 *      │   │   ├── guc_info	# dent
 *      │   │   ├── guc_...
 *
 * This function assumes that &m->private will be set to the &struct
 * drm_info_node corresponding to the instance of the info on a given &struct
 * drm_minor (see struct drm_info_list.show for details).
 *
 * This function also assumes that struct drm_info_list.data will point to the
 * function code that will actually print a file content::
 *
 *    int (*print)(struct xe_guc *, struct drm_printer *)
 *
 * Example::
 *
 *    int foo(struct xe_guc *guc, struct drm_printer *p)
 *    {
 *        drm_printf(p, "enabled %d\n", guc->submission_state.enabled);
 *        return 0;
 *    }
 *
 *    static const struct drm_info_list bar[] = {
 *        { name = "foo", .show = guc_debugfs_show, .data = foo },
 *    };
 *
 *    parent = debugfs_create_dir("uc", gtdir);
 *    drm_debugfs_create_files(bar, ARRAY_SIZE(bar), parent, minor);
 *
 * Return: 0 on success or a negative error code on failure.
 */
static int guc_debugfs_show(struct seq_file *m, void *data)
{
	struct drm_printer p = drm_seq_file_printer(m);
	struct drm_info_node *node = m->private;
	struct dentry *parent = node->dent->d_parent;
	struct dentry *grandparent = parent->d_parent;
	struct xe_gt *gt = grandparent->d_inode->i_private;
	struct xe_device *xe = gt_to_xe(gt);
	int (*print)(struct xe_guc *, struct drm_printer *) = node->info_ent->data;

	guard(xe_pm_runtime)(xe);
	return print(&gt->uc.guc, &p);
}

static int guc_log(struct xe_guc *guc, struct drm_printer *p)
{
	xe_guc_log_print(&guc->log, p);
	return 0;
}

static int guc_log_lfd(struct xe_guc *guc, struct drm_printer *p)
{
	xe_guc_log_print_lfd(&guc->log, p);
	return 0;
}

static int guc_log_dmesg(struct xe_guc *guc, struct drm_printer *p)
{

Annotation

Implementation Notes