drivers/gpu/drm/vc4/vc4_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Copyright © 2014 Broadcom
   4  */
   5
   6 #include <drm/drm_drv.h>
   7
   8 #include <linux/seq_file.h>
   9 #include <linux/circ_buf.h>
  10 #include <linux/ctype.h>
  11 #include <linux/debugfs.h>
  12 #include <linux/platform_device.h>
  13
  14 #include "vc4_drv.h"
  15 #include "vc4_regs.h"
  16
  17 /*
  18  * Called at drm_dev_register() time on each of the minors registered
  19  * by the DRM device, to attach the debugfs files.
  20  */
  21 void
  22 vc4_debugfs_init(struct drm_minor *minor)
  23 {
  24         struct vc4_dev *vc4 = to_vc4_dev(minor->dev);
  25         struct drm_device *drm = &vc4->base;
  26
  27         drm_WARN_ON(drm, vc4_hvs_debugfs_init(minor));
  28
  29         if (vc4->is_vc5) {
  30                 drm_WARN_ON(drm, vc5_bo_debugfs_init(minor));
  31         }
  32
  33         if (vc4->v3d) {
  34                 drm_WARN_ON(drm, vc4_bo_debugfs_init(minor));
  35                 drm_WARN_ON(drm, vc4_v3d_debugfs_init(minor));
  36         }
  37 }
  38
  39 static int vc4_debugfs_regset32(struct seq_file *m, void *unused)
  40 {
  41         struct drm_info_node *node = (struct drm_info_node *)m->private;
  42         struct drm_device *drm = node->minor->dev;
  43         struct debugfs_regset32 *regset = node->info_ent->data;
  44         struct drm_printer p = drm_seq_file_printer(m);
  45         int idx;
  46
  47         if (!drm_dev_enter(drm, &idx))
  48                 return -ENODEV;
  49
  50         drm_print_regset32(&p, regset);
  51
  52         drm_dev_exit(idx);
  53
  54         return 0;
  55 }
  56
  57 struct vc5_gem_info_data {
  58         struct drm_file *filp;
  59         struct seq_file *m;
  60 };
  61
  62 static int vc5_gem_one_info(int id, void *ptr, void *data)
  63 {
  64
  65         struct drm_gem_object *obj = (struct drm_gem_object *)ptr;
  66         struct vc5_gem_info_data *gem_info_data = data;
  67         struct vc4_file *vc4file = gem_info_data->filp->driver_priv;
  68         struct drm_vc5_file_private *file_priv = &vc4file->priv;
  69
  70         if (!obj) {
  71                 DRM_ERROR("failed to get drm_gem_object\n");
  72                 return -EFAULT;
  73         }
  74
  75         drm_gem_object_get(obj);
  76
  77         seq_printf(gem_info_data->m,
  78                         "%5d\t%5d\t%4d\t%4d\t\t%4d\t0x%08zx\t0x%x\t%4d\t%4d\t\t"
  79                         "%4d\t\t0x%p\t%6d\n",
  80                         file_priv->pid,
  81                         file_priv->tgid,
  82                         id,
  83                         kref_read(&obj->refcount) - 1,
  84                         obj->handle_count,
  85                         obj->size,
  86                         0,
  87                         0,
  88                         obj->dma_buf ? 1 : 0,
  89                         obj->import_attach ? 1 : 0,
  90                         obj,
  91                         obj->name);
  92
  93         drm_gem_object_put(obj);
  94
  95         return 0;
  96 }
  97
  98 int vc5_debugfs_gem_info(struct seq_file *m, void *data)
  99 {
 100         struct drm_info_node *node = (struct drm_info_node *)m->private;
 101         struct drm_minor *minor = node->minor;
 102         struct drm_device *drm_dev = minor->dev;
 103         struct vc5_gem_info_data gem_info_data;
 104         struct drm_file *filp;
 105
 106         gem_info_data.m = m;
 107
 108         seq_puts(gem_info_data.m,
 109                         "pid\ttgid\thandle\trefcount\thcount\tsize\t\tflags\t"
 110                         "pfnmap\texport_to_fd\timport_from_fd\tobj_addr\t\t"
 111                         "name\n");
 112
 113         mutex_lock(&drm_dev->struct_mutex);
 114         list_for_each_entry(filp, &drm_dev->filelist, lhead) {
 115                 gem_info_data.filp = filp;
 116
 117                 spin_lock(&filp->table_lock);
 118                 idr_for_each(&filp->object_idr, vc5_gem_one_info,
 119                                 &gem_info_data);
 120                 spin_unlock(&filp->table_lock);
 121         }
 122         mutex_unlock(&drm_dev->struct_mutex);
 123
 124         return 0;
 125 }
 126
 127 int vc4_debugfs_add_file(struct drm_minor *minor,
 128                          const char *name,
 129                          int (*show)(struct seq_file*, void*),
 130                          void *data)
 131 {
 132         struct drm_device *dev = minor->dev;
 133         struct dentry *root = minor->debugfs_root;
 134         struct drm_info_list *file;
 135
 136         file = drmm_kzalloc(dev, sizeof(*file), GFP_KERNEL);
 137         if (!file)
 138                 return -ENOMEM;
 139
 140         file->name = name;
 141         file->show = show;
 142         file->data = data;
 143
 144         drm_debugfs_create_files(file, 1, root, minor);
 145
 146         return 0;
 147 }
 148
 149 int vc4_debugfs_add_regset32(struct drm_minor *minor,
 150                              const char *name,
 151                              struct debugfs_regset32 *regset)
 152 {
 153         return vc4_debugfs_add_file(minor, name, vc4_debugfs_regset32, regset);
 154 }