LXR linux/drivers/gpu/drm/i915/gt/intel_gt

   1// SPDX-License-Identifier: MIT
   2/*
   3 * Copyright © 2019 Intel Corporation
   4 */
   5
   6#include <linux/debugfs.h>
   7
   8#include "i915_drv.h"
   9#include "intel_gt_debugfs.h"
  10#include "intel_gt_engines_debugfs.h"
  11#include "intel_gt_pm_debugfs.h"
  12#include "intel_sseu_debugfs.h"
  13#include "pxp/intel_pxp_debugfs.h"
  14#include "uc/intel_uc_debugfs.h"
  15
  16int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val)
  17{
  18        int ret = intel_gt_terminally_wedged(gt);
  19
  20        switch (ret) {
  21        case -EIO:
  22                *val = 1;
  23                return 0;
  24        case 0:
  25                *val = 0;
  26                return 0;
  27        default:
  28                return ret;
  29        }
  30}
  31
  32int intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val)
  33{
  34        /* Flush any previous reset before applying for a new one */
  35        wait_event(gt->reset.queue,
  36                   !test_bit(I915_RESET_BACKOFF, &gt->reset.flags));
  37
  38        intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE,
  39                              "Manually reset engine mask to %llx", val);
  40        return 0;
  41}
  42
  43/*
  44 * keep the interface clean where the first parameter
  45 * is a 'struct intel_gt *' instead of 'void *'
  46 */
  47static int __intel_gt_debugfs_reset_show(void *data, u64 *val)
  48{
  49        return intel_gt_debugfs_reset_show(data, val);
  50}
  51
  52static int __intel_gt_debugfs_reset_store(void *data, u64 val)
  53{
  54        return intel_gt_debugfs_reset_store(data, val);
  55}
  56
  57DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show,
  58                        __intel_gt_debugfs_reset_store, "%llu\n");
  59
  60static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root)
  61{
  62        static const struct intel_gt_debugfs_file files[] = {
  63                { "reset", &reset_fops, NULL },
  64        };
  65
  66        intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt);
  67}
  68
  69void intel_gt_debugfs_register(struct intel_gt *gt)
  70{
  71        struct dentry *root;
  72
  73        if (!gt->i915->drm.primary->debugfs_root)
  74                return;
  75
  76        root = debugfs_create_dir("gt", gt->i915->drm.primary->debugfs_root);
  77        if (IS_ERR(root))
  78                return;
  79
  80        gt_debugfs_register(gt, root);
  81
  82        intel_gt_engines_debugfs_register(gt, root);
  83        intel_gt_pm_debugfs_register(gt, root);
  84        intel_sseu_debugfs_register(gt, root);
  85
  86        intel_uc_debugfs_register(&gt->uc, root);
  87        intel_pxp_debugfs_register(&gt->pxp, root);
  88}
  89
  90void intel_gt_debugfs_register_files(struct dentry *root,
  91                                     const struct intel_gt_debugfs_file *files,
  92                                     unsigned long count, void *data)
  93{
  94        while (count--) {
  95                umode_t mode = files->fops->write ? 0644 : 0444;
  96
  97                if (!files->eval || files->eval(data))
  98                        debugfs_create_file(files->name,
  99                                            mode, root, data,
 100                                            files->fops);
 101
 102                files++;
 103        }
 104}
 105