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linux/drivers/char/drm/drm_proc.c

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/**
* \file drm_proc.c
* /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 = proc_mkdir(name, 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 and _DRM_CONSISTENT */
const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
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 > 5)
type = "??";
else
type = types[map->type];
DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s 0x%02x 0x%08x ",
i,
map->offset,
map->size, type, map->flags, r_list->user_token);
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_mutex 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;
mutex_lock(&dev->struct_mutex);
ret = drm__vm_info(buf, start, offset, request, eof, data);
mutex_unlock(&dev->struct_mutex);
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_mutex 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;
mutex_lock(&dev->struct_mutex);
ret = drm__queues_info(buf, start, offset, request, eof, data);
mutex_unlock(&dev->struct_mutex);
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_mutex 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;
mutex_lock(&dev->struct_mutex);
ret = drm__bufs_info(buf, start, offset, request, eof, data);
mutex_unlock(&dev->struct_mutex);
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_mutex 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;
mutex_lock(&dev->struct_mutex);
ret = drm__clients_info(buf, start, offset, request, eof, data);
mutex_unlock(&dev->struct_mutex);
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' : '-',
vma->vm_pgoff << PAGE_SHIFT);
#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;
mutex_lock(&dev->struct_mutex);
ret = drm__vma_info(buf, start, offset, request, eof, data);
mutex_unlock(&dev->struct_mutex);
return ret;
}
#endif
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