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.

This contains the i915 hooks rewrite as well, to make bisectability better.

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

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
+