2 * \file drm_memory_debug.c
3 * Memory management wrappers for DRM.
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
10 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
14 * Permission is hereby granted, free of charge, to any person obtaining a
15 * copy of this software and associated documentation files (the "Software"),
16 * to deal in the Software without restriction, including without limitation
17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
18 * and/or sell copies of the Software, and to permit persons to whom the
19 * Software is furnished to do so, subject to the following conditions:
21 * The above copyright notice and this permission notice (including the next
22 * paragraph) shall be included in all copies or substantial portions of the
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
28 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
29 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
30 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
31 * OTHER DEALINGS IN THE SOFTWARE.
34 #include <linux/config.h>
39 typedef struct drm_mem_stats {
44 unsigned long bytes_allocated;
45 unsigned long bytes_freed;
48 static spinlock_t drm_mem_lock = SPIN_LOCK_UNLOCKED;
49 static unsigned long drm_ram_available = 0; /* In pages */
50 static unsigned long drm_ram_used = 0;
51 static drm_mem_stats_t drm_mem_stats[] = {
52 [DRM_MEM_DMA] = {"dmabufs"},
53 [DRM_MEM_SAREA] = {"sareas"},
54 [DRM_MEM_DRIVER] = {"driver"},
55 [DRM_MEM_MAGIC] = {"magic"},
56 [DRM_MEM_IOCTLS] = {"ioctltab"},
57 [DRM_MEM_MAPS] = {"maplist"},
58 [DRM_MEM_VMAS] = {"vmalist"},
59 [DRM_MEM_BUFS] = {"buflist"},
60 [DRM_MEM_SEGS] = {"seglist"},
61 [DRM_MEM_PAGES] = {"pagelist"},
62 [DRM_MEM_FILES] = {"files"},
63 [DRM_MEM_QUEUES] = {"queues"},
64 [DRM_MEM_CMDS] = {"commands"},
65 [DRM_MEM_MAPPINGS] = {"mappings"},
66 [DRM_MEM_BUFLISTS] = {"buflists"},
67 [DRM_MEM_AGPLISTS] = {"agplist"},
68 [DRM_MEM_SGLISTS] = {"sglist"},
69 [DRM_MEM_TOTALAGP] = {"totalagp"},
70 [DRM_MEM_BOUNDAGP] = {"boundagp"},
71 [DRM_MEM_CTXBITMAP] = {"ctxbitmap"},
72 [DRM_MEM_CTXLIST] = {"ctxlist"},
73 [DRM_MEM_STUB] = {"stub"},
74 {NULL, 0,} /* Last entry must be null */
77 void drm_mem_init(void)
82 for (mem = drm_mem_stats; mem->name; ++mem) {
83 mem->succeed_count = 0;
86 mem->bytes_allocated = 0;
91 drm_ram_available = si.totalram;
95 /* drm_mem_info is called whenever a process reads /dev/drm/mem. */
97 static int drm__mem_info(char *buf, char **start, off_t offset,
98 int request, int *eof, void *data)
103 if (offset > DRM_PROC_LIMIT) {
109 *start = &buf[offset];
111 DRM_PROC_PRINT(" total counts "
112 " | outstanding \n");
113 DRM_PROC_PRINT("type alloc freed fail bytes freed"
114 " | allocs bytes\n\n");
115 DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB |\n",
117 drm_ram_available << (PAGE_SHIFT - 10));
118 DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB |\n",
119 "locked", 0, 0, 0, drm_ram_used >> 10);
120 DRM_PROC_PRINT("\n");
121 for (pt = drm_mem_stats; pt->name; pt++) {
122 DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
129 pt->succeed_count - pt->free_count,
130 (long)pt->bytes_allocated
131 - (long)pt->bytes_freed);
134 if (len > request + offset)
140 int drm_mem_info(char *buf, char **start, off_t offset,
141 int len, int *eof, void *data)
145 spin_lock(&drm_mem_lock);
146 ret = drm__mem_info(buf, start, offset, len, eof, data);
147 spin_unlock(&drm_mem_lock);
151 void *drm_alloc(size_t size, int area)
156 DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
160 if (!(pt = kmalloc(size, GFP_KERNEL))) {
161 spin_lock(&drm_mem_lock);
162 ++drm_mem_stats[area].fail_count;
163 spin_unlock(&drm_mem_lock);
166 spin_lock(&drm_mem_lock);
167 ++drm_mem_stats[area].succeed_count;
168 drm_mem_stats[area].bytes_allocated += size;
169 spin_unlock(&drm_mem_lock);
172 EXPORT_SYMBOL(drm_alloc);
174 void *drm_calloc(size_t nmemb, size_t size, int area)
178 addr = drm_alloc(nmemb * size, area);
180 memset((void *)addr, 0, size * nmemb);
184 EXPORT_SYMBOL(drm_calloc);
186 void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
190 if (!(pt = drm_alloc(size, area)))
192 if (oldpt && oldsize) {
193 memcpy(pt, oldpt, oldsize);
194 drm_free(oldpt, oldsize, area);
198 EXPORT_SYMBOL(drm_realloc);
200 void drm_free(void *pt, size_t size, int area)
206 DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
209 spin_lock(&drm_mem_lock);
210 drm_mem_stats[area].bytes_freed += size;
211 free_count = ++drm_mem_stats[area].free_count;
212 alloc_count = drm_mem_stats[area].succeed_count;
213 spin_unlock(&drm_mem_lock);
214 if (free_count > alloc_count) {
215 DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
216 free_count, alloc_count);
219 EXPORT_SYMBOL(drm_free);
221 unsigned long drm_alloc_pages(int order, int area)
223 unsigned long address;
224 unsigned long bytes = PAGE_SIZE << order;
228 spin_lock(&drm_mem_lock);
229 if ((drm_ram_used >> PAGE_SHIFT)
230 > (DRM_RAM_PERCENT * drm_ram_available) / 100) {
231 spin_unlock(&drm_mem_lock);
234 spin_unlock(&drm_mem_lock);
236 address = __get_free_pages(GFP_KERNEL, order);
238 spin_lock(&drm_mem_lock);
239 ++drm_mem_stats[area].fail_count;
240 spin_unlock(&drm_mem_lock);
243 spin_lock(&drm_mem_lock);
244 ++drm_mem_stats[area].succeed_count;
245 drm_mem_stats[area].bytes_allocated += bytes;
246 drm_ram_used += bytes;
247 spin_unlock(&drm_mem_lock);
249 /* Zero outside the lock */
250 memset((void *)address, 0, bytes);
253 for (addr = address, sz = bytes;
254 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
255 SetPageReserved(virt_to_page(addr));
261 void drm_free_pages(unsigned long address, int order, int area)
263 unsigned long bytes = PAGE_SIZE << order;
270 DRM_MEM_ERROR(area, "Attempt to free address 0\n");
273 for (addr = address, sz = bytes;
274 sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
275 ClearPageReserved(virt_to_page(addr));
277 free_pages(address, order);
280 spin_lock(&drm_mem_lock);
281 free_count = ++drm_mem_stats[area].free_count;
282 alloc_count = drm_mem_stats[area].succeed_count;
283 drm_mem_stats[area].bytes_freed += bytes;
284 drm_ram_used -= bytes;
285 spin_unlock(&drm_mem_lock);
286 if (free_count > alloc_count) {
288 "Excess frees: %d frees, %d allocs\n",
289 free_count, alloc_count);
293 void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t * dev)
298 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
299 "Mapping 0 bytes at 0x%08lx\n", offset);
303 if (!(pt = drm_ioremap(offset, size, dev))) {
304 spin_lock(&drm_mem_lock);
305 ++drm_mem_stats[DRM_MEM_MAPPINGS].fail_count;
306 spin_unlock(&drm_mem_lock);
309 spin_lock(&drm_mem_lock);
310 ++drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
311 drm_mem_stats[DRM_MEM_MAPPINGS].bytes_allocated += size;
312 spin_unlock(&drm_mem_lock);
315 EXPORT_SYMBOL(drm_ioremap);
317 void *drm_ioremap_nocache(unsigned long offset, unsigned long size,
323 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
324 "Mapping 0 bytes at 0x%08lx\n", offset);
328 if (!(pt = drm_ioremap_nocache(offset, size, dev))) {
329 spin_lock(&drm_mem_lock);
330 ++drm_mem_stats[DRM_MEM_MAPPINGS].fail_count;
331 spin_unlock(&drm_mem_lock);
334 spin_lock(&drm_mem_lock);
335 ++drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
336 drm_mem_stats[DRM_MEM_MAPPINGS].bytes_allocated += size;
337 spin_unlock(&drm_mem_lock);
340 EXPORT_SYMBOL(drm_ioremap_nocache);
342 void drm_ioremapfree(void *pt, unsigned long size, drm_device_t * dev)
348 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
349 "Attempt to free NULL pointer\n");
351 drm_ioremapfree(pt, size, dev);
353 spin_lock(&drm_mem_lock);
354 drm_mem_stats[DRM_MEM_MAPPINGS].bytes_freed += size;
355 free_count = ++drm_mem_stats[DRM_MEM_MAPPINGS].free_count;
356 alloc_count = drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
357 spin_unlock(&drm_mem_lock);
358 if (free_count > alloc_count) {
359 DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
360 "Excess frees: %d frees, %d allocs\n",
361 free_count, alloc_count);
364 EXPORT_SYMBOL(drm_ioremapfree);
368 DRM_AGP_MEM *drm_alloc_agp(drm_device_t *dev, int pages, u32 type)
373 DRM_MEM_ERROR(DRM_MEM_TOTALAGP, "Allocating 0 pages\n");
377 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
378 if ((handle = drm_agp_allocate_memory(pages, type))) {
380 if ((handle = drm_agp_allocate_memory(dev->agp->bridge, pages, type))) {
382 spin_lock(&drm_mem_lock);
383 ++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
384 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
385 += pages << PAGE_SHIFT;
386 spin_unlock(&drm_mem_lock);
389 spin_lock(&drm_mem_lock);
390 ++drm_mem_stats[DRM_MEM_TOTALAGP].fail_count;
391 spin_unlock(&drm_mem_lock);
394 EXPORT_SYMBOL(drm_alloc_agp);
396 int drm_free_agp(DRM_AGP_MEM * handle, int pages)
400 int retval = -EINVAL;
403 DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
404 "Attempt to free NULL AGP handle\n");
408 if (drm_agp_free_memory(handle)) {
409 spin_lock(&drm_mem_lock);
410 free_count = ++drm_mem_stats[DRM_MEM_TOTALAGP].free_count;
411 alloc_count = drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
412 drm_mem_stats[DRM_MEM_TOTALAGP].bytes_freed
413 += pages << PAGE_SHIFT;
414 spin_unlock(&drm_mem_lock);
415 if (free_count > alloc_count) {
416 DRM_MEM_ERROR(DRM_MEM_TOTALAGP,
417 "Excess frees: %d frees, %d allocs\n",
418 free_count, alloc_count);
424 EXPORT_SYMBOL(drm_free_agp);
426 int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start)
428 int retcode = -EINVAL;
431 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
432 "Attempt to bind NULL AGP handle\n");
436 if (!(retcode = drm_agp_bind_memory(handle, start))) {
437 spin_lock(&drm_mem_lock);
438 ++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
439 drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
440 += handle->page_count << PAGE_SHIFT;
441 spin_unlock(&drm_mem_lock);
444 spin_lock(&drm_mem_lock);
445 ++drm_mem_stats[DRM_MEM_BOUNDAGP].fail_count;
446 spin_unlock(&drm_mem_lock);
449 EXPORT_SYMBOL(drm_bind_agp);
451 int drm_unbind_agp(DRM_AGP_MEM * handle)
455 int retcode = -EINVAL;
458 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
459 "Attempt to unbind NULL AGP handle\n");
463 if ((retcode = drm_agp_unbind_memory(handle)))
465 spin_lock(&drm_mem_lock);
466 free_count = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
467 alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
468 drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed
469 += handle->page_count << PAGE_SHIFT;
470 spin_unlock(&drm_mem_lock);
471 if (free_count > alloc_count) {
472 DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
473 "Excess frees: %d frees, %d allocs\n",
474 free_count, alloc_count);
478 EXPORT_SYMBOL(drm_unbind_agp);