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linux/include/drm/drm_memory_debug.h

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/**
* \file drm_memory_debug.h
* Memory management wrappers for DRM.
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@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"
typedef struct drm_mem_stats {
const char *name;
int succeed_count;
int free_count;
int fail_count;
unsigned long bytes_allocated;
unsigned long bytes_freed;
} drm_mem_stats_t;
static DEFINE_SPINLOCK(drm_mem_lock);
static unsigned long drm_ram_available = 0; /* In pages */
static unsigned long drm_ram_used = 0;
static drm_mem_stats_t drm_mem_stats[] =
{
[DRM_MEM_DMA] = {"dmabufs"},
[DRM_MEM_SAREA] = {"sareas"},
[DRM_MEM_DRIVER] = {"driver"},
[DRM_MEM_MAGIC] = {"magic"},
[DRM_MEM_IOCTLS] = {"ioctltab"},
[DRM_MEM_MAPS] = {"maplist"},
[DRM_MEM_VMAS] = {"vmalist"},
[DRM_MEM_BUFS] = {"buflist"},
[DRM_MEM_SEGS] = {"seglist"},
[DRM_MEM_PAGES] = {"pagelist"},
[DRM_MEM_FILES] = {"files"},
[DRM_MEM_QUEUES] = {"queues"},
[DRM_MEM_CMDS] = {"commands"},
[DRM_MEM_MAPPINGS] = {"mappings"},
[DRM_MEM_BUFLISTS] = {"buflists"},
[DRM_MEM_AGPLISTS] = {"agplist"},
[DRM_MEM_SGLISTS] = {"sglist"},
[DRM_MEM_TOTALAGP] = {"totalagp"},
[DRM_MEM_BOUNDAGP] = {"boundagp"},
[DRM_MEM_CTXBITMAP] = {"ctxbitmap"},
[DRM_MEM_CTXLIST] = {"ctxlist"},
[DRM_MEM_STUB] = {"stub"},
{NULL, 0,} /* Last entry must be null */
};
void drm_mem_init (void) {
drm_mem_stats_t *mem;
struct sysinfo si;
for (mem = drm_mem_stats; mem->name; ++mem) {
mem->succeed_count = 0;
mem->free_count = 0;
mem->fail_count = 0;
mem->bytes_allocated = 0;
mem->bytes_freed = 0;
}
si_meminfo(&si);
drm_ram_available = si.totalram;
drm_ram_used = 0;
}
/* drm_mem_info is called whenever a process reads /dev/drm/mem. */
static int drm__mem_info (char *buf, char **start, off_t offset,
int request, int *eof, void *data) {
drm_mem_stats_t *pt;
int len = 0;
if (offset > DRM_PROC_LIMIT) {
*eof = 1;
return 0;
}
*eof = 0;
*start = &buf[offset];
DRM_PROC_PRINT(" total counts "
" | outstanding \n");
DRM_PROC_PRINT("type alloc freed fail bytes freed"
" | allocs bytes\n\n");
DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB |\n",
"system", 0, 0, 0,
drm_ram_available << (PAGE_SHIFT - 10));
DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB |\n",
"locked", 0, 0, 0, drm_ram_used >> 10);
DRM_PROC_PRINT("\n");
for (pt = drm_mem_stats; pt->name; pt++) {
DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
pt->name,
pt->succeed_count,
pt->free_count,
pt->fail_count,
pt->bytes_allocated,
pt->bytes_freed,
pt->succeed_count - pt->free_count,
(long)pt->bytes_allocated
- (long)pt->bytes_freed);
}
if (len > request + offset)
return request;
*eof = 1;
return len - offset;
}
int drm_mem_info (char *buf, char **start, off_t offset,
int len, int *eof, void *data) {
int ret;
spin_lock(&drm_mem_lock);
ret = drm__mem_info (buf, start, offset, len, eof, data);
spin_unlock(&drm_mem_lock);
return ret;
}
void *drm_alloc (size_t size, int area) {
void *pt;
if (!size) {
DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
return NULL;
}
if (!(pt = kmalloc(size, GFP_KERNEL))) {
spin_lock(&drm_mem_lock);
++drm_mem_stats[area].fail_count;
spin_unlock(&drm_mem_lock);
return NULL;
}
spin_lock(&drm_mem_lock);
++drm_mem_stats[area].succeed_count;
drm_mem_stats[area].bytes_allocated += size;
spin_unlock(&drm_mem_lock);
return pt;
}
void *drm_calloc (size_t nmemb, size_t size, int area) {
void *addr;
addr = drm_alloc (nmemb * size, area);
if (addr != NULL)
memset((void *)addr, 0, size * nmemb);
return addr;
}
void *drm_realloc (void *oldpt, size_t oldsize, size_t size, int area) {
void *pt;
if (!(pt = drm_alloc (size, area)))
return NULL;
if (oldpt && oldsize) {
memcpy(pt, oldpt, oldsize);
drm_free (oldpt, oldsize, area);
}
return pt;
}
void drm_free (void *pt, size_t size, int area) {
int alloc_count;
int free_count;
if (!pt)
DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
else
kfree(pt);
spin_lock(&drm_mem_lock);
drm_mem_stats[area].bytes_freed += size;
free_count = ++drm_mem_stats[area].free_count;
alloc_count = drm_mem_stats[area].succeed_count;
spin_unlock(&drm_mem_lock);
if (free_count > alloc_count) {
DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
free_count, alloc_count);
}
}
#if __OS_HAS_AGP
DRM_AGP_MEM *drm_alloc_agp (drm_device_t *dev, int pages, u32 type) {
DRM_AGP_MEM *handle;
if (!pages) {
DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
return NULL;
}
if ((handle = drm_agp_allocate_memory (pages, type))) {
spin_lock(&drm_mem_lock);
++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
+= pages << PAGE_SHIFT;
spin_unlock(&drm_mem_lock);
return handle;
}
spin_lock(&drm_mem_lock);
++drm_mem_stats[DRM_MEM_TOTALAGP].fail_count;
spin_unlock(&drm_mem_lock);
return NULL;
}
int drm_free_agp (DRM_AGP_MEM * handle, int pages) {
int alloc_count;
int free_count;
int retval = -EINVAL;
if (!handle) {
DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
"Attempt to free NULL AGP handle\n");
return retval;
}
if (drm_agp_free_memory (handle)) {
spin_lock(&drm_mem_lock);
free_count = ++drm_mem_stats[DRM_MEM_TOTALAGP].free_count;
alloc_count = drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
drm_mem_stats[DRM_MEM_TOTALAGP].bytes_freed
+= pages << PAGE_SHIFT;
spin_unlock(&drm_mem_lock);
if (free_count > alloc_count) {
DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
"Excess frees: %d frees, %d allocs\n",
free_count, alloc_count);
}
return 0;
}
return retval;
}
int drm_bind_agp (DRM_AGP_MEM * handle, unsigned int start) {
int retcode = -EINVAL;
if (!handle) {
DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
"Attempt to bind NULL AGP handle\n");
return retcode;
}
if (!(retcode = drm_agp_bind_memory (handle, start))) {
spin_lock(&drm_mem_lock);
++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
+= handle->page_count << PAGE_SHIFT;
spin_unlock(&drm_mem_lock);
return retcode;
}
spin_lock(&drm_mem_lock);
++drm_mem_stats[DRM_MEM_BOUNDAGP].fail_count;
spin_unlock(&drm_mem_lock);
return retcode;
}
int drm_unbind_agp (DRM_AGP_MEM * handle) {
int alloc_count;
int free_count;
int retcode = -EINVAL;
if (!handle) {
DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
"Attempt to unbind NULL AGP handle\n");
return retcode;
}
if ((retcode = drm_agp_unbind_memory (handle)))
return retcode;
spin_lock(&drm_mem_lock);
free_count = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed
+= handle->page_count << PAGE_SHIFT;
spin_unlock(&drm_mem_lock);
if (free_count > alloc_count) {
DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
"Excess frees: %d frees, %d allocs\n",
free_count, alloc_count);
}
return retcode;
}
#endif
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