1. 根目录:
2. drivers
3. gpu
4. drm
5. drm_info.c

/**
 * \file drm_info.c
 * DRM info file implementations
 *
 * \author Ben Gamari <bgamari@gmail.com>
 */

/*
 * Created: Sun Dec 21 13:09:50 2008 by bgamari@gmail.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include <linux/seq_file.h>
#include <drm/drmP.h>

/**
 * Called when "/proc/dri/.../name" is read.
 *
 * Prints the device name together with the bus id if available.
 */
int drm_name_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_minor *minor = node->minor;
	struct drm_device *dev = minor->dev;
	struct drm_master *master = minor->master;
	const char *bus_name;
	if (!master)
		return 0;

	bus_name = dev->driver->bus->get_name(dev);
	if (master->unique) {
		seq_printf(m, "%s %s %s\n",
			   bus_name,
			   dev_name(dev->dev), master->unique);
	} else {
		seq_printf(m, "%s %s\n",
			   bus_name, dev_name(dev->dev));
	}
	return 0;
}

/**
 * Called when "/proc/dri/.../vm" is read.
 *
 * Prints information about all mappings in drm_device::maplist.
 */
int drm_vm_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	struct drm_local_map *map;
	struct drm_map_list *r_list;

	/* Hardcoded from _DRM_FRAME_BUFFER,
	   _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
	   _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
	const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
	const char *type;
	int i;

	mutex_lock(&dev->struct_mutex);
	seq_printf(m, "slot	 offset	      size type flags	 address mtrr\n\n");
	i = 0;
	list_for_each_entry(r_list, &dev->maplist, head) {
		map = r_list->map;
		if (!map)
			continue;
		if (map->type < 0 || map->type > 5)
			type = "??";
		else
			type = types[map->type];

		seq_printf(m, "%4d 0x%016llx 0x%08lx %4.4s  0x%02x 0x%08lx ",
			   i,
			   (unsigned long long)map->offset,
			   map->size, type, map->flags,
			   (unsigned long) r_list->user_token);
		if (map->mtrr < 0)
			seq_printf(m, "none\n");
		else
			seq_printf(m, "%4d\n", map->mtrr);
		i++;
	}
	mutex_unlock(&dev->struct_mutex);
	return 0;
}

/**
 * Called when "/proc/dri/.../bufs" is read.
 */
int drm_bufs_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	struct drm_device_dma *dma;
	int i, seg_pages;

	mutex_lock(&dev->struct_mutex);
	dma = dev->dma;
	if (!dma) {
		mutex_unlock(&dev->struct_mutex);
		return 0;
	}

	seq_printf(m, " o     size count  free	 segs pages    kB\n\n");
	for (i = 0; i <= DRM_MAX_ORDER; i++) {
		if (dma->bufs[i].buf_count) {
			seg_pages = dma->bufs[i].seg_count * (1 << dma->bufs[i].page_order);
			seq_printf(m, "%2d %8d %5d %5d %5d %5d %5ld\n",
				   i,
				   dma->bufs[i].buf_size,
				   dma->bufs[i].buf_count,
				   atomic_read(&dma->bufs[i].freelist.count),
				   dma->bufs[i].seg_count,
				   seg_pages,
				   seg_pages * PAGE_SIZE / 1024);
		}
	}
	seq_printf(m, "\n");
	for (i = 0; i < dma->buf_count; i++) {
		if (i && !(i % 32))
			seq_printf(m, "\n");
		seq_printf(m, " %d", dma->buflist[i]->list);
	}
	seq_printf(m, "\n");
	mutex_unlock(&dev->struct_mutex);
	return 0;
}

/**
 * Called when "/proc/dri/.../vblank" is read.
 */
int drm_vblank_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	int crtc;

	mutex_lock(&dev->struct_mutex);
	for (crtc = 0; crtc < dev->num_crtcs; crtc++) {
		seq_printf(m, "CRTC %d enable:     %d\n",
			   crtc, atomic_read(&dev->vblank[crtc].refcount));
		seq_printf(m, "CRTC %d counter:    %d\n",
			   crtc, drm_vblank_count(dev, crtc));
		seq_printf(m, "CRTC %d last wait:  %d\n",
			   crtc, dev->vblank[crtc].last_wait);
		seq_printf(m, "CRTC %d in modeset: %d\n",
			   crtc, dev->vblank[crtc].inmodeset);
	}
	mutex_unlock(&dev->struct_mutex);
	return 0;
}

/**
 * Called when "/proc/dri/.../clients" is read.
 *
 */
int drm_clients_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	struct drm_file *priv;

	mutex_lock(&dev->struct_mutex);
	seq_printf(m, "a dev	pid    uid	magic\n\n");
	list_for_each_entry(priv, &dev->filelist, lhead) {
		seq_printf(m, "%c %3d %5d %5d %10u\n",
			   priv->authenticated ? 'y' : 'n',
			   priv->minor->index,
			   pid_vnr(priv->pid),
			   from_kuid_munged(seq_user_ns(m), priv->uid),
			   priv->magic);
	}
	mutex_unlock(&dev->struct_mutex);
	return 0;
}


static int drm_gem_one_name_info(int id, void *ptr, void *data)
{
	struct drm_gem_object *obj = ptr;
	struct seq_file *m = data;

	seq_printf(m, "%6d %8zd %7d %8d\n",
		   obj->name, obj->size,
		   obj->handle_count,
		   atomic_read(&obj->refcount.refcount));
	return 0;
}

int drm_gem_name_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;

	seq_printf(m, "  name     size handles refcount\n");

	mutex_lock(&dev->object_name_lock);
	idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
	mutex_unlock(&dev->object_name_lock);

	return 0;
}

#if DRM_DEBUG_CODE

int drm_vma_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	struct drm_vma_entry *pt;
	struct vm_area_struct *vma;
	unsigned long vma_count = 0;
#if defined(__i386__)
	unsigned int pgprot;
#endif

	mutex_lock(&dev->struct_mutex);
	list_for_each_entry(pt, &dev->vmalist, head)
		vma_count++;

	seq_printf(m, "vma use count: %lu, high_memory = %pK, 0x%pK\n",
		   vma_count, high_memory,
		   (void *)(unsigned long)virt_to_phys(high_memory));

	list_for_each_entry(pt, &dev->vmalist, head) {
		vma = pt->vma;
		if (!vma)
			continue;
		seq_printf(m,
			   "\n%5d 0x%pK-0x%pK %c%c%c%c%c%c 0x%08lx000",
			   pt->pid,
			   (void *)vma->vm_start, (void *)vma->vm_end,
			   vma->vm_flags & VM_READ ? 'r' : '-',
			   vma->vm_flags & VM_WRITE ? 'w' : '-',
			   vma->vm_flags & VM_EXEC ? 'x' : '-',
			   vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
			   vma->vm_flags & VM_LOCKED ? 'l' : '-',
			   vma->vm_flags & VM_IO ? 'i' : '-',
			   vma->vm_pgoff);

#if defined(__i386__)
		pgprot = pgprot_val(vma->vm_page_prot);
		seq_printf(m, " %c%c%c%c%c%c%c%c%c",
			   pgprot & _PAGE_PRESENT ? 'p' : '-',
			   pgprot & _PAGE_RW ? 'w' : 'r',
			   pgprot & _PAGE_USER ? 'u' : 's',
			   pgprot & _PAGE_PWT ? 't' : 'b',
			   pgprot & _PAGE_PCD ? 'u' : 'c',
			   pgprot & _PAGE_ACCESSED ? 'a' : '-',
			   pgprot & _PAGE_DIRTY ? 'd' : '-',
			   pgprot & _PAGE_PSE ? 'm' : 'k',
			   pgprot & _PAGE_GLOBAL ? 'g' : 'l');
#endif
		seq_printf(m, "\n");
	}
	mutex_unlock(&dev->struct_mutex);
	return 0;
}

#endif