drivers/gpu/drm/i915/gt/intel_gt_debugfs.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/i915/gt/intel_gt_debugfs.c
Extension
.c
Size
2826 bytes
Lines
123
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 © 2019 Intel Corporation
 */

#include <linux/debugfs.h>

#include <drm/drm_print.h>

#include "i915_drv.h"
#include "intel_gt.h"
#include "intel_gt_debugfs.h"
#include "intel_gt_engines_debugfs.h"
#include "intel_gt_mcr.h"
#include "intel_gt_pm_debugfs.h"
#include "intel_sseu_debugfs.h"
#include "uc/intel_uc_debugfs.h"

int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val)
{
	int ret = intel_gt_terminally_wedged(gt);

	switch (ret) {
	case -EIO:
		*val = 1;
		return 0;
	case 0:
		*val = 0;
		return 0;
	default:
		return ret;
	}
}

void intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val)
{
	/* Flush any previous reset before applying for a new one */
	wait_event(gt->reset.queue,
		   !test_bit(I915_RESET_BACKOFF, &gt->reset.flags));

	intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE,
			      "Manually reset engine mask to %llx", val);
}

/*
 * keep the interface clean where the first parameter
 * is a 'struct intel_gt *' instead of 'void *'
 */
static int __intel_gt_debugfs_reset_show(void *data, u64 *val)
{
	return intel_gt_debugfs_reset_show(data, val);
}

static int __intel_gt_debugfs_reset_store(void *data, u64 val)
{
	intel_gt_debugfs_reset_store(data, val);

	return 0;
}

DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show,
			__intel_gt_debugfs_reset_store, "%llu\n");

static int steering_show(struct seq_file *m, void *data)
{
	struct drm_printer p = drm_seq_file_printer(m);
	struct intel_gt *gt = m->private;

	intel_gt_mcr_report_steering(&p, gt, true);

	return 0;
}
DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(steering);

static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root)
{
	static const struct intel_gt_debugfs_file files[] = {
		{ .name = "reset", .fops = &reset_fops },
		{ .name = "steering", .fops = &steering_fops },
	};

	intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt);
}

void intel_gt_debugfs_register(struct intel_gt *gt)
{
	struct dentry *debugfs_root = gt->i915->drm.debugfs_root;
	struct dentry *root;
	char gtname[4];

Annotation

Implementation Notes