400 lines
10 KiB
C
400 lines
10 KiB
C
/**
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* \file drm_memory_debug.c
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* Memory management wrappers for DRM.
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*/
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/*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "drmP.h"
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#ifdef DEBUG_MEMORY
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typedef struct drm_mem_stats {
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const char *name;
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int succeed_count;
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int free_count;
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int fail_count;
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unsigned long bytes_allocated;
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unsigned long bytes_freed;
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} drm_mem_stats_t;
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static spinlock_t drm_mem_lock = SPIN_LOCK_UNLOCKED;
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static unsigned long drm_ram_available = 0; /* In pages */
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static unsigned long drm_ram_used = 0;
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static drm_mem_stats_t drm_mem_stats[] = {
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[DRM_MEM_DMA] = {"dmabufs"},
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[DRM_MEM_SAREA] = {"sareas"},
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[DRM_MEM_DRIVER] = {"driver"},
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[DRM_MEM_MAGIC] = {"magic"},
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[DRM_MEM_IOCTLS] = {"ioctltab"},
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[DRM_MEM_MAPS] = {"maplist"},
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[DRM_MEM_VMAS] = {"vmalist"},
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[DRM_MEM_BUFS] = {"buflist"},
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[DRM_MEM_SEGS] = {"seglist"},
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[DRM_MEM_PAGES] = {"pagelist"},
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[DRM_MEM_FILES] = {"files"},
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[DRM_MEM_QUEUES] = {"queues"},
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[DRM_MEM_CMDS] = {"commands"},
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[DRM_MEM_MAPPINGS] = {"mappings"},
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[DRM_MEM_BUFLISTS] = {"buflists"},
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[DRM_MEM_AGPLISTS] = {"agplist"},
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[DRM_MEM_SGLISTS] = {"sglist"},
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[DRM_MEM_TOTALAGP] = {"totalagp"},
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[DRM_MEM_BOUNDAGP] = {"boundagp"},
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[DRM_MEM_CTXBITMAP] = {"ctxbitmap"},
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[DRM_MEM_CTXLIST] = {"ctxlist"},
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[DRM_MEM_STUB] = {"stub"},
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{NULL, 0,} /* Last entry must be null */
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};
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void drm_mem_init(void)
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{
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drm_mem_stats_t *mem;
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struct sysinfo si;
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for (mem = drm_mem_stats; mem->name; ++mem) {
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mem->succeed_count = 0;
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mem->free_count = 0;
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mem->fail_count = 0;
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mem->bytes_allocated = 0;
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mem->bytes_freed = 0;
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}
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si_meminfo(&si);
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drm_ram_available = si.totalram;
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drm_ram_used = 0;
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}
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/* drm_mem_info is called whenever a process reads /dev/drm/mem. */
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static int drm__mem_info(char *buf, char **start, off_t offset,
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int request, int *eof, void *data)
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{
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drm_mem_stats_t *pt;
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int len = 0;
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if (offset > DRM_PROC_LIMIT) {
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*eof = 1;
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return 0;
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}
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*eof = 0;
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*start = &buf[offset];
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DRM_PROC_PRINT(" total counts "
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" | outstanding \n");
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DRM_PROC_PRINT("type alloc freed fail bytes freed"
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" | allocs bytes\n\n");
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DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB |\n",
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"system", 0, 0, 0,
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drm_ram_available << (PAGE_SHIFT - 10));
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DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB |\n",
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"locked", 0, 0, 0, drm_ram_used >> 10);
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DRM_PROC_PRINT("\n");
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for (pt = drm_mem_stats; pt->name; pt++) {
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DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
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pt->name,
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pt->succeed_count,
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pt->free_count,
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pt->fail_count,
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pt->bytes_allocated,
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pt->bytes_freed,
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pt->succeed_count - pt->free_count,
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(long)pt->bytes_allocated
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- (long)pt->bytes_freed);
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}
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if (len > request + offset)
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return request;
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*eof = 1;
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return len - offset;
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}
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int drm_mem_info(char *buf, char **start, off_t offset,
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int len, int *eof, void *data)
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{
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int ret;
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spin_lock(&drm_mem_lock);
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ret = drm__mem_info(buf, start, offset, len, eof, data);
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spin_unlock(&drm_mem_lock);
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return ret;
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}
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void *drm_alloc(size_t size, int area)
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{
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void *pt;
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if (!size) {
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DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
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return NULL;
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}
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if (!(pt = kmalloc(size, GFP_KERNEL))) {
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spin_lock(&drm_mem_lock);
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++drm_mem_stats[area].fail_count;
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spin_unlock(&drm_mem_lock);
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return NULL;
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}
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spin_lock(&drm_mem_lock);
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++drm_mem_stats[area].succeed_count;
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drm_mem_stats[area].bytes_allocated += size;
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spin_unlock(&drm_mem_lock);
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return pt;
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}
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EXPORT_SYMBOL(drm_alloc);
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void *drm_calloc(size_t nmemb, size_t size, int area)
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{
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void *addr;
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addr = drm_alloc(nmemb * size, area);
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if (addr != NULL)
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memset((void *)addr, 0, size * nmemb);
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return addr;
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}
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EXPORT_SYMBOL(drm_calloc);
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void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
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{
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void *pt;
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if (!(pt = drm_alloc(size, area)))
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return NULL;
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if (oldpt && oldsize) {
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memcpy(pt, oldpt, oldsize);
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drm_free(oldpt, oldsize, area);
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}
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return pt;
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}
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EXPORT_SYMBOL(drm_realloc);
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void drm_free(void *pt, size_t size, int area)
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{
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int alloc_count;
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int free_count;
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if (!pt)
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DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
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else
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kfree(pt);
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spin_lock(&drm_mem_lock);
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drm_mem_stats[area].bytes_freed += size;
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free_count = ++drm_mem_stats[area].free_count;
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alloc_count = drm_mem_stats[area].succeed_count;
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spin_unlock(&drm_mem_lock);
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if (free_count > alloc_count) {
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DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
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free_count, alloc_count);
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}
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}
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EXPORT_SYMBOL(drm_free);
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unsigned long drm_alloc_pages(int order, int area)
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{
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unsigned long address;
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unsigned long bytes = PAGE_SIZE << order;
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unsigned long addr;
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unsigned int sz;
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spin_lock(&drm_mem_lock);
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if ((drm_ram_used >> PAGE_SHIFT)
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> (DRM_RAM_PERCENT * drm_ram_available) / 100) {
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spin_unlock(&drm_mem_lock);
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return 0;
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}
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spin_unlock(&drm_mem_lock);
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address = __get_free_pages(GFP_KERNEL, order);
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if (!address) {
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spin_lock(&drm_mem_lock);
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++drm_mem_stats[area].fail_count;
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spin_unlock(&drm_mem_lock);
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return 0;
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}
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spin_lock(&drm_mem_lock);
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++drm_mem_stats[area].succeed_count;
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drm_mem_stats[area].bytes_allocated += bytes;
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drm_ram_used += bytes;
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spin_unlock(&drm_mem_lock);
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/* Zero outside the lock */
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memset((void *)address, 0, bytes);
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/* Reserve */
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for (addr = address, sz = bytes;
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sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
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SetPageReserved(virt_to_page(addr));
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}
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return address;
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}
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void drm_free_pages(unsigned long address, int order, int area)
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{
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unsigned long bytes = PAGE_SIZE << order;
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int alloc_count;
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int free_count;
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unsigned long addr;
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unsigned int sz;
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if (!address) {
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DRM_MEM_ERROR(area, "Attempt to free address 0\n");
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} else {
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/* Unreserve */
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for (addr = address, sz = bytes;
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sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
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ClearPageReserved(virt_to_page(addr));
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}
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free_pages(address, order);
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}
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spin_lock(&drm_mem_lock);
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free_count = ++drm_mem_stats[area].free_count;
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alloc_count = drm_mem_stats[area].succeed_count;
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drm_mem_stats[area].bytes_freed += bytes;
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drm_ram_used -= bytes;
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spin_unlock(&drm_mem_lock);
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if (free_count > alloc_count) {
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DRM_MEM_ERROR(area,
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"Excess frees: %d frees, %d allocs\n",
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free_count, alloc_count);
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}
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}
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#if __OS_HAS_AGP
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DRM_AGP_MEM *drm_alloc_agp(struct drm_device *dev, int pages, u32 type)
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{
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DRM_AGP_MEM *handle;
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if (!pages) {
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DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
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return NULL;
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}
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if ((handle = drm_agp_allocate_memory(dev->agp->bridge, pages, type))) {
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spin_lock(&drm_mem_lock);
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++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
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drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
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+= pages << PAGE_SHIFT;
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spin_unlock(&drm_mem_lock);
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return handle;
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}
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spin_lock(&drm_mem_lock);
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++drm_mem_stats[DRM_MEM_TOTALAGP].fail_count;
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spin_unlock(&drm_mem_lock);
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return NULL;
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}
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int drm_free_agp(DRM_AGP_MEM * handle, int pages)
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{
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int alloc_count;
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int free_count;
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int retval = -EINVAL;
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if (!handle) {
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DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
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"Attempt to free NULL AGP handle\n");
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return retval;
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}
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if (drm_agp_free_memory(handle)) {
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spin_lock(&drm_mem_lock);
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free_count = ++drm_mem_stats[DRM_MEM_TOTALAGP].free_count;
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alloc_count = drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
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drm_mem_stats[DRM_MEM_TOTALAGP].bytes_freed
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+= pages << PAGE_SHIFT;
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spin_unlock(&drm_mem_lock);
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if (free_count > alloc_count) {
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DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
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"Excess frees: %d frees, %d allocs\n",
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free_count, alloc_count);
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}
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return 0;
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}
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return retval;
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}
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int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start)
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{
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int retcode = -EINVAL;
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if (!handle) {
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DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
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"Attempt to bind NULL AGP handle\n");
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return retcode;
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}
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if (!(retcode = drm_agp_bind_memory(handle, start))) {
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spin_lock(&drm_mem_lock);
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++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
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drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
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+= handle->page_count << PAGE_SHIFT;
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spin_unlock(&drm_mem_lock);
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return retcode;
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}
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spin_lock(&drm_mem_lock);
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++drm_mem_stats[DRM_MEM_BOUNDAGP].fail_count;
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spin_unlock(&drm_mem_lock);
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return retcode;
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}
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int drm_unbind_agp(DRM_AGP_MEM * handle)
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{
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int alloc_count;
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int free_count;
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int retcode = -EINVAL;
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if (!handle) {
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DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
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"Attempt to unbind NULL AGP handle\n");
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return retcode;
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}
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if ((retcode = drm_agp_unbind_memory(handle)))
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return retcode;
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spin_lock(&drm_mem_lock);
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free_count = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
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alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
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drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed
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+= handle->page_count << PAGE_SHIFT;
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spin_unlock(&drm_mem_lock);
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if (free_count > alloc_count) {
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DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
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"Excess frees: %d frees, %d allocs\n",
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free_count, alloc_count);
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}
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return retcode;
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}
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#endif
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#endif
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