drm: Convert proc files to seq_file and introduce debugfs

The old mechanism to formatting proc files is extremely ugly. The
seq_file API was designed specifically for cases like this and greatly
simplifies the process.

Also, most of the files in /proc really don't belong there. This patch
introduces the infrastructure for putting these into debugfs and exposes
all of the proc files in debugfs as well.

Signed-off-by: Ben Gamari <bgamari@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 328 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c
new file mode 100644
index 000000000000..fc98952b9033
--- /dev/null
+++ b/drivers/gpu/drm/drm_info.c
@@ -0,0 +1,328 @@
+/**
+ * \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 "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;
+
+	if (!master)
+		return 0;
+
+	if (master->unique) {
+		seq_printf(m, "%s %s %s\n",
+			   dev->driver->pci_driver.name,
+			   pci_name(dev->pdev), master->unique);
+	} else {
+		seq_printf(m, "%s %s\n", dev->driver->pci_driver.name,
+			   pci_name(dev->pdev));
+	}
+
+	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_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%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
+			   i,
+			   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/.../queues" is read.
+ */
+int drm_queues_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 i;
+	struct drm_queue *q;
+
+	mutex_lock(&dev->struct_mutex);
+	seq_printf(m, "  ctx/flags   use   fin"
+		   "   blk/rw/rwf  wait    flushed	   queued"
+		   "      locks\n\n");
+	for (i = 0; i < dev->queue_count; i++) {
+		q = dev->queuelist[i];
+		atomic_inc(&q->use_count);
+		seq_printf(m,   "%5d/0x%03x %5d %5d"
+			   " %5d/%c%c/%c%c%c %5Zd\n",
+			   i,
+			   q->flags,
+			   atomic_read(&q->use_count),
+			   atomic_read(&q->finalization),
+			   atomic_read(&q->block_count),
+			   atomic_read(&q->block_read) ? 'r' : '-',
+			   atomic_read(&q->block_write) ? 'w' : '-',
+			   waitqueue_active(&q->read_queue) ? 'r' : '-',
+			   waitqueue_active(&q->write_queue) ? 'w' : '-',
+			   waitqueue_active(&q->flush_queue) ? 'f' : '-',
+			   DRM_BUFCOUNT(&q->waitlist));
+		atomic_dec(&q->use_count);
+	}
+	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_refcount[crtc]));
+		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->last_vblank_wait[crtc]);
+		seq_printf(m, "CRTC %d in modeset: %d\n",
+			   crtc, dev->vblank_inmodeset[crtc]);
+	}
+	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	  ioctls\n\n");
+	list_for_each_entry(priv, &dev->filelist, lhead) {
+		seq_printf(m, "%c %3d %5d %5d %10u %10lu\n",
+			   priv->authenticated ? 'y' : 'n',
+			   priv->minor->index,
+			   priv->pid,
+			   priv->uid, priv->magic, priv->ioctl_count);
+	}
+	mutex_unlock(&dev->struct_mutex);
+	return 0;
+}
+
+
+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, "name %d size %zd\n", obj->name, obj->size);
+
+	seq_printf(m, "%6d %8zd %7d %8d\n",
+		   obj->name, obj->size,
+		   atomic_read(&obj->handlecount.refcount),
+		   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");
+	idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
+	return 0;
+}
+
+int drm_gem_object_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, "%d objects\n", atomic_read(&dev->object_count));
+	seq_printf(m, "%d object bytes\n", atomic_read(&dev->object_memory));
+	seq_printf(m, "%d pinned\n", atomic_read(&dev->pin_count));
+	seq_printf(m, "%d pin bytes\n", atomic_read(&dev->pin_memory));
+	seq_printf(m, "%d gtt bytes\n", atomic_read(&dev->gtt_memory));
+	seq_printf(m, "%d gtt total\n", dev->gtt_total);
+	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;
+#if defined(__i386__)
+	unsigned int pgprot;
+#endif
+
+	mutex_lock(&dev->struct_mutex);
+	seq_printf(m, "vma use count: %d, high_memory = %p, 0x%08lx\n",
+		   atomic_read(&dev->vma_count),
+		   high_memory, 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%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
+			   pt->pid, vma->vm_start, 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
+