drm_proc.h

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

/* drm_proc.h -- /proc support for DRM -*- linux-c -*-
 * Created: Mon Jan 11 09:48:47 1999 by [e-mail]
 *
 * 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.
 *
 * Authors:
 *    Rickard E. (Rik) Faith <[e-mail]>
 *    Gareth Hughes <[e-mail]>
 *
 * Acknowledgements:
 *    Matthew J Sottek <[e-mail]> sent in a patch to fix
 *    the problem with the proc files not outputting all their information.
 */

#define __NO_VERSION__
#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
#if __HAVE_DMA_HISTOGRAM
static int	   DRM(histo_info)(char *buf, char **start, off_t offset,
				   int request, int *eof, void *data);
#endif

struct drm_proc_list {
	const char *name;
	int	   (*f)(char *, char **, off_t, int, int *, void *);
} 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
#if __HAVE_DMA_HISTOGRAM
	{ "histo",   DRM(histo_info)   },
#endif
};
#define DRM_PROC_ENTRIES (sizeof(DRM(proc_list))/sizeof(DRM(proc_list)[0]))

struct proc_dir_entry *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];

	if (!minor) root = create_proc_entry("dri", S_IFDIR, NULL);
	if (!root) {
		DRM_ERROR("Cannot create /proc/dri\n");
		return NULL;
	}

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

	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);
			if (!minor) remove_proc_entry("dri", NULL);
			return NULL;
		}
		ent->read_proc = DRM(proc_list)[i].f;
		ent->data      = dev;
	}

	return root;
}


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);
	if (!minor) remove_proc_entry("dri", NULL);

	return 0;
}

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 0x%x %s\n",
			       dev->name, dev->device, dev->unique);
	} else {
		DRM_PROC_PRINT("%s 0x%x\n", dev->name, dev->device);
	}

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

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, and
                                   _DRM_AGP. */
	const char   *types[] = { "FB", "REG", "SHM", "AGP" };
	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 = (drm_map_list_t *)list;
		map = r_list->map;
		if(!map) continue;
		if (map->type < 0 || map->type > 3) 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;
}

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;
}


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;
}

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;
}

/* drm_bufs_info is called whenever a process reads
   /dev/dri/<dev>/bufs. */

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))