drm: misc cleanup

[firewire-audio.git] / drivers / char / drm / drm_proc.c

/**
 * \file drm_proc.h 
 * /proc support for DRM
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 *
 * \par Acknowledgements:
 *    Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
 *    the problem with the proc files not outputting all their information.
 */

/*
 * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * 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 "drmP.h"

static int         drm_name_info(char *buf, char **start, off_t offset,
                                  int request, int *eof, void *data);
static int         drm_vm_info(char *buf, char **start, off_t offset,
                                int request, int *eof, void *data);
static int         drm_clients_info(char *buf, char **start, off_t offset,
                                     int request, int *eof, void *data);
static int         drm_queues_info(char *buf, char **start, off_t offset,
                                    int request, int *eof, void *data);
static int         drm_bufs_info(char *buf, char **start, off_t offset,
                                  int request, int *eof, void *data);
#if DRM_DEBUG_CODE
static int         drm_vma_info(char *buf, char **start, off_t offset,
                                 int request, int *eof, void *data);
#endif

/**
 * Proc file list.
 */
static struct drm_proc_list {
        const char *name;       /**< file name */
        int        (*f)(char *, char **, off_t, int, int *, void *);    /**< proc callback*/
} drm_proc_list[] = {
        { "name",    drm_name_info    },
        { "mem",     drm_mem_info     },
        { "vm",      drm_vm_info      },
        { "clients", drm_clients_info },
        { "queues",  drm_queues_info  },
        { "bufs",    drm_bufs_info    },
#if DRM_DEBUG_CODE
        { "vma",     drm_vma_info     },
#endif
};
#define DRM_PROC_ENTRIES (sizeof(drm_proc_list)/sizeof(drm_proc_list[0]))

/**
 * Initialize the DRI proc filesystem for a device.
 *
 * \param dev DRM device.
 * \param minor device minor number.
 * \param root DRI proc dir entry.
 * \param dev_root resulting DRI device proc dir entry.
 * \return root entry pointer on success, or NULL on failure.
 * 
 * Create the DRI proc root entry "/proc/dri", the device proc root entry
 * "/proc/dri/%minor%/", and each entry in proc_list as
 * "/proc/dri/%minor%/%name%".
 */
int drm_proc_init(drm_device_t *dev, int minor,
                    struct proc_dir_entry *root,
                    struct proc_dir_entry **dev_root)
{
        struct proc_dir_entry *ent;
        int                   i, j;
        char                  name[64];

        sprintf(name, "%d", minor);
        *dev_root = create_proc_entry(name, S_IFDIR, root);
        if (!*dev_root) {
                DRM_ERROR("Cannot create /proc/dri/%s\n", name);
                return -1;
        }

        for (i = 0; i < DRM_PROC_ENTRIES; i++) {
                ent = create_proc_entry(drm_proc_list[i].name,
                                        S_IFREG|S_IRUGO, *dev_root);
                if (!ent) {
                        DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
                                  name, drm_proc_list[i].name);
                        for (j = 0; j < i; j++)
                                remove_proc_entry(drm_proc_list[i].name,
                                                  *dev_root);
                        remove_proc_entry(name, root);
                        return -1;
                }
                ent->read_proc = drm_proc_list[i].f;
                ent->data      = dev;
        }

        return 0;
}


/**
 * Cleanup the proc filesystem resources.
 *
 * \param minor device minor number.
 * \param root DRI proc dir entry.
 * \param dev_root DRI device proc dir entry.
 * \return always zero.
 *
 * Remove all proc entries created by proc_init().
 */
int drm_proc_cleanup(int minor, struct proc_dir_entry *root,
                      struct proc_dir_entry *dev_root)
{
        int  i;
        char name[64];

        if (!root || !dev_root) return 0;

        for (i = 0; i < DRM_PROC_ENTRIES; i++)
                remove_proc_entry(drm_proc_list[i].name, dev_root);
        sprintf(name, "%d", minor);
        remove_proc_entry(name, root);

        return 0;
}

/**
 * Called when "/proc/dri/.../name" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 * 
 * Prints the device name together with the bus id if available.
 */
static int drm_name_info(char *buf, char **start, off_t offset, int request,
                          int *eof, void *data)
{
        drm_device_t *dev = (drm_device_t *)data;
        int          len  = 0;

        if (offset > DRM_PROC_LIMIT) {
                *eof = 1;
                return 0;
        }

        *start = &buf[offset];
        *eof   = 0;

        if (dev->unique) {
                DRM_PROC_PRINT("%s %s %s\n",
                               dev->driver->pci_driver.name, pci_name(dev->pdev), dev->unique);
        } else {
                DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name, pci_name(dev->pdev));
        }

        if (len > request + offset) return request;
        *eof = 1;
        return len - offset;
}

/**
 * Called when "/proc/dri/.../vm" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 * 
 * Prints information about all mappings in drm_device::maplist.
 */
static int drm__vm_info(char *buf, char **start, off_t offset, int request,
                         int *eof, void *data)
{
        drm_device_t *dev = (drm_device_t *)data;
        int          len  = 0;
        drm_map_t    *map;
        drm_map_list_t *r_list;
        struct list_head *list;

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

        if (offset > DRM_PROC_LIMIT) {
                *eof = 1;
                return 0;
        }

        *start = &buf[offset];
        *eof   = 0;

        DRM_PROC_PRINT("slot     offset       size type flags    "
                       "address mtrr\n\n");
        i = 0;
        if (dev->maplist != NULL) list_for_each(list, &dev->maplist->head) {
                r_list = list_entry(list, drm_map_list_t, head);
                map = r_list->map;
                if(!map) continue;
                if (map->type < 0 || map->type > 4) type = "??";
                else                                type = types[map->type];
                DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
                               i,
                               map->offset,
                               map->size,
                               type,
                               map->flags,
                               (unsigned long)map->handle);
                if (map->mtrr < 0) {
                        DRM_PROC_PRINT("none\n");
                } else {
                        DRM_PROC_PRINT("%4d\n", map->mtrr);
                }
                i++;
        }

        if (len > request + offset) return request;
        *eof = 1;
        return len - offset;
}

/**
 * Simply calls _vm_info() while holding the drm_device::struct_sem lock.
 */
static int drm_vm_info(char *buf, char **start, off_t offset, int request,
                        int *eof, void *data)
{
        drm_device_t *dev = (drm_device_t *)data;
        int          ret;

        down(&dev->struct_sem);
        ret = drm__vm_info(buf, start, offset, request, eof, data);
        up(&dev->struct_sem);
        return ret;
}

/**
 * Called when "/proc/dri/.../queues" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int drm__queues_info(char *buf, char **start, off_t offset,
                             int request, int *eof, void *data)
{
        drm_device_t *dev = (drm_device_t *)data;
        int          len  = 0;
        int          i;
        drm_queue_t  *q;

        if (offset > DRM_PROC_LIMIT) {
                *eof = 1;
                return 0;
        }

        *start = &buf[offset];
        *eof   = 0;

        DRM_PROC_PRINT("  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);
                DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
                                   "%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);
        }

        if (len > request + offset) return request;
        *eof = 1;
        return len - offset;
}

/**
 * Simply calls _queues_info() while holding the drm_device::struct_sem lock.
 */
static int drm_queues_info(char *buf, char **start, off_t offset, int request,
                            int *eof, void *data)
{
        drm_device_t *dev = (drm_device_t *)data;
        int          ret;

        down(&dev->struct_sem);
        ret = drm__queues_info(buf, start, offset, request, eof, data);
        up(&dev->struct_sem);
        return ret;
}

/**
 * Called when "/proc/dri/.../bufs" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
                           int *eof, void *data)
{
        drm_device_t     *dev = (drm_device_t *)data;
        int              len  = 0;
        drm_device_dma_t *dma = dev->dma;
        int              i;

        if (!dma || offset > DRM_PROC_LIMIT) {
                *eof = 1;
                return 0;
        }

        *start = &buf[offset];
        *eof   = 0;

        DRM_PROC_PRINT(" o     size count  free  segs pages    kB\n\n");
        for (i = 0; i <= DRM_MAX_ORDER; i++) {
                if (dma->bufs[i].buf_count)
                        DRM_PROC_PRINT("%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,
                                       dma->bufs[i].seg_count
                                       *(1 << dma->bufs[i].page_order),
                                       (dma->bufs[i].seg_count
                                        * (1 << dma->bufs[i].page_order))
                                       * PAGE_SIZE / 1024);
        }
        DRM_PROC_PRINT("\n");
        for (i = 0; i < dma->buf_count; i++) {
                if (i && !(i%32)) DRM_PROC_PRINT("\n");
                DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
        }
        DRM_PROC_PRINT("\n");

        if (len > request + offset) return request;
        *eof = 1;
        return len - offset;
}

/**
 * Simply calls _bufs_info() while holding the drm_device::struct_sem lock.
 */
static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
                          int *eof, void *data)
{
        drm_device_t *dev = (drm_device_t *)data;
        int          ret;

        down(&dev->struct_sem);
        ret = drm__bufs_info(buf, start, offset, request, eof, data);
        up(&dev->struct_sem);
        return ret;
}

/**
 * Called when "/proc/dri/.../clients" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int drm__clients_info(char *buf, char **start, off_t offset,
                              int request, int *eof, void *data)
{
        drm_device_t *dev = (drm_device_t *)data;
        int          len  = 0;
        drm_file_t   *priv;

        if (offset > DRM_PROC_LIMIT) {
                *eof = 1;
                return 0;
        }

        *start = &buf[offset];
        *eof   = 0;

        DRM_PROC_PRINT("a dev   pid    uid      magic     ioctls\n\n");
        for (priv = dev->file_first; priv; priv = priv->next) {
                DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
                               priv->authenticated ? 'y' : 'n',
                               priv->minor,
                               priv->pid,
                               priv->uid,
                               priv->magic,
                               priv->ioctl_count);
        }

        if (len > request + offset) return request;
        *eof = 1;
        return len - offset;
}

/**
 * Simply calls _clients_info() while holding the drm_device::struct_sem lock.
 */
static int drm_clients_info(char *buf, char **start, off_t offset,
                             int request, int *eof, void *data)
{
        drm_device_t *dev = (drm_device_t *)data;
        int          ret;

        down(&dev->struct_sem);
        ret = drm__clients_info(buf, start, offset, request, eof, data);
        up(&dev->struct_sem);
        return ret;
}

#if DRM_DEBUG_CODE

static int drm__vma_info(char *buf, char **start, off_t offset, int request,
                          int *eof, void *data)
{
        drm_device_t          *dev = (drm_device_t *)data;
        int                   len  = 0;
        drm_vma_entry_t       *pt;
        struct vm_area_struct *vma;
#if defined(__i386__)
        unsigned int          pgprot;
#endif

        if (offset > DRM_PROC_LIMIT) {
                *eof = 1;
                return 0;
        }

        *start = &buf[offset];
        *eof   = 0;

        DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
                       atomic_read(&dev->vma_count),
                       high_memory, virt_to_phys(high_memory));
        for (pt = dev->vmalist; pt; pt = pt->next) {
                if (!(vma = pt->vma)) continue;
                DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx",
                               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' : '-',
                               VM_OFFSET(vma));

#if defined(__i386__)
                pgprot = pgprot_val(vma->vm_page_prot);
                DRM_PROC_PRINT(" %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
                DRM_PROC_PRINT("\n");
        }

        if (len > request + offset) return request;
        *eof = 1;
        return len - offset;
}

static int drm_vma_info(char *buf, char **start, off_t offset, int request,
                         int *eof, void *data)
{
        drm_device_t *dev = (drm_device_t *)data;
        int          ret;

        down(&dev->struct_sem);
        ret = drm__vma_info(buf, start, offset, request, eof, data);
        up(&dev->struct_sem);
        return ret;
}
#endif