2 * Copyright 2016 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
22 * Authors: Christian König
25 #include <linux/dma-mapping.h>
27 #include "amdgpu_vm.h"
28 #include "amdgpu_atomfirmware.h"
31 struct amdgpu_vram_mgr {
39 * DOC: mem_info_vram_total
41 * The amdgpu driver provides a sysfs API for reporting current total VRAM
42 * available on the device
43 * The file mem_info_vram_total is used for this and returns the total
44 * amount of VRAM in bytes
46 static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
47 struct device_attribute *attr, char *buf)
49 struct drm_device *ddev = dev_get_drvdata(dev);
50 struct amdgpu_device *adev = ddev->dev_private;
52 return snprintf(buf, PAGE_SIZE, "%llu\n", adev->gmc.real_vram_size);
56 * DOC: mem_info_vis_vram_total
58 * The amdgpu driver provides a sysfs API for reporting current total
59 * visible VRAM available on the device
60 * The file mem_info_vis_vram_total is used for this and returns the total
61 * amount of visible VRAM in bytes
63 static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
64 struct device_attribute *attr, char *buf)
66 struct drm_device *ddev = dev_get_drvdata(dev);
67 struct amdgpu_device *adev = ddev->dev_private;
69 return snprintf(buf, PAGE_SIZE, "%llu\n", adev->gmc.visible_vram_size);
73 * DOC: mem_info_vram_used
75 * The amdgpu driver provides a sysfs API for reporting current total VRAM
76 * available on the device
77 * The file mem_info_vram_used is used for this and returns the total
78 * amount of currently used VRAM in bytes
80 static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
81 struct device_attribute *attr, char *buf)
83 struct drm_device *ddev = dev_get_drvdata(dev);
84 struct amdgpu_device *adev = ddev->dev_private;
86 return snprintf(buf, PAGE_SIZE, "%llu\n",
87 amdgpu_vram_mgr_usage(&adev->mman.bdev.man[TTM_PL_VRAM]));
91 * DOC: mem_info_vis_vram_used
93 * The amdgpu driver provides a sysfs API for reporting current total of
95 * The file mem_info_vis_vram_used is used for this and returns the total
96 * amount of currently used visible VRAM in bytes
98 static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
99 struct device_attribute *attr, char *buf)
101 struct drm_device *ddev = dev_get_drvdata(dev);
102 struct amdgpu_device *adev = ddev->dev_private;
104 return snprintf(buf, PAGE_SIZE, "%llu\n",
105 amdgpu_vram_mgr_vis_usage(&adev->mman.bdev.man[TTM_PL_VRAM]));
108 static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev,
109 struct device_attribute *attr,
112 struct drm_device *ddev = dev_get_drvdata(dev);
113 struct amdgpu_device *adev = ddev->dev_private;
115 switch (adev->gmc.vram_vendor) {
117 return snprintf(buf, PAGE_SIZE, "samsung\n");
119 return snprintf(buf, PAGE_SIZE, "infineon\n");
121 return snprintf(buf, PAGE_SIZE, "elpida\n");
123 return snprintf(buf, PAGE_SIZE, "etron\n");
125 return snprintf(buf, PAGE_SIZE, "nanya\n");
127 return snprintf(buf, PAGE_SIZE, "hynix\n");
129 return snprintf(buf, PAGE_SIZE, "mosel\n");
131 return snprintf(buf, PAGE_SIZE, "winbond\n");
133 return snprintf(buf, PAGE_SIZE, "esmt\n");
135 return snprintf(buf, PAGE_SIZE, "micron\n");
137 return snprintf(buf, PAGE_SIZE, "unknown\n");
141 static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
142 amdgpu_mem_info_vram_total_show, NULL);
143 static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
144 amdgpu_mem_info_vis_vram_total_show,NULL);
145 static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
146 amdgpu_mem_info_vram_used_show, NULL);
147 static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
148 amdgpu_mem_info_vis_vram_used_show, NULL);
149 static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO,
150 amdgpu_mem_info_vram_vendor, NULL);
152 static const struct attribute *amdgpu_vram_mgr_attributes[] = {
153 &dev_attr_mem_info_vram_total.attr,
154 &dev_attr_mem_info_vis_vram_total.attr,
155 &dev_attr_mem_info_vram_used.attr,
156 &dev_attr_mem_info_vis_vram_used.attr,
157 &dev_attr_mem_info_vram_vendor.attr,
162 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
164 * @man: TTM memory type manager
165 * @p_size: maximum size of VRAM
167 * Allocate and initialize the VRAM manager.
169 static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
170 unsigned long p_size)
172 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
173 struct amdgpu_vram_mgr *mgr;
176 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
180 drm_mm_init(&mgr->mm, 0, p_size);
181 spin_lock_init(&mgr->lock);
184 /* Add the two VRAM-related sysfs files */
185 ret = sysfs_create_files(&adev->dev->kobj, amdgpu_vram_mgr_attributes);
187 DRM_ERROR("Failed to register sysfs\n");
193 * amdgpu_vram_mgr_fini - free and destroy VRAM manager
195 * @man: TTM memory type manager
197 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
198 * allocated inside it.
200 static int amdgpu_vram_mgr_fini(struct ttm_mem_type_manager *man)
202 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
203 struct amdgpu_vram_mgr *mgr = man->priv;
205 spin_lock(&mgr->lock);
206 drm_mm_takedown(&mgr->mm);
207 spin_unlock(&mgr->lock);
210 sysfs_remove_files(&adev->dev->kobj, amdgpu_vram_mgr_attributes);
215 * amdgpu_vram_mgr_vis_size - Calculate visible node size
217 * @adev: amdgpu device structure
218 * @node: MM node structure
220 * Calculate how many bytes of the MM node are inside visible VRAM
222 static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
223 struct drm_mm_node *node)
225 uint64_t start = node->start << PAGE_SHIFT;
226 uint64_t end = (node->size + node->start) << PAGE_SHIFT;
228 if (start >= adev->gmc.visible_vram_size)
231 return (end > adev->gmc.visible_vram_size ?
232 adev->gmc.visible_vram_size : end) - start;
236 * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size
238 * @bo: &amdgpu_bo buffer object (must be in VRAM)
241 * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM.
243 u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
245 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
246 struct ttm_mem_reg *mem = &bo->tbo.mem;
247 struct drm_mm_node *nodes = mem->mm_node;
248 unsigned pages = mem->num_pages;
251 if (amdgpu_gmc_vram_full_visible(&adev->gmc))
252 return amdgpu_bo_size(bo);
254 if (mem->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
257 for (usage = 0; nodes && pages; pages -= nodes->size, nodes++)
258 usage += amdgpu_vram_mgr_vis_size(adev, nodes);
264 * amdgpu_vram_mgr_virt_start - update virtual start address
266 * @mem: ttm_mem_reg to update
267 * @node: just allocated node
269 * Calculate a virtual BO start address to easily check if everything is CPU
272 static void amdgpu_vram_mgr_virt_start(struct ttm_mem_reg *mem,
273 struct drm_mm_node *node)
277 start = node->start + node->size;
278 if (start > mem->num_pages)
279 start -= mem->num_pages;
282 mem->start = max(mem->start, start);
286 * amdgpu_vram_mgr_new - allocate new ranges
288 * @man: TTM memory type manager
289 * @tbo: TTM BO we need this range for
290 * @place: placement flags and restrictions
291 * @mem: the resulting mem object
293 * Allocate VRAM for the given BO.
295 static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
296 struct ttm_buffer_object *tbo,
297 const struct ttm_place *place,
298 struct ttm_mem_reg *mem)
300 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
301 struct amdgpu_vram_mgr *mgr = man->priv;
302 struct drm_mm *mm = &mgr->mm;
303 struct drm_mm_node *nodes;
304 enum drm_mm_insert_mode mode;
305 unsigned long lpfn, num_nodes, pages_per_node, pages_left;
306 uint64_t vis_usage = 0, mem_bytes, max_bytes;
314 max_bytes = adev->gmc.mc_vram_size;
315 if (tbo->type != ttm_bo_type_kernel)
316 max_bytes -= AMDGPU_VM_RESERVED_VRAM;
318 /* bail out quickly if there's likely not enough VRAM for this BO */
319 mem_bytes = (u64)mem->num_pages << PAGE_SHIFT;
320 if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) {
321 atomic64_sub(mem_bytes, &mgr->usage);
326 if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
327 pages_per_node = ~0ul;
330 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
331 pages_per_node = HPAGE_PMD_NR;
334 pages_per_node = (2UL << (20UL - PAGE_SHIFT));
336 pages_per_node = max((uint32_t)pages_per_node, mem->page_alignment);
337 num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node);
340 nodes = kvmalloc_array((uint32_t)num_nodes, sizeof(*nodes),
341 GFP_KERNEL | __GFP_ZERO);
343 atomic64_sub(mem_bytes, &mgr->usage);
347 mode = DRM_MM_INSERT_BEST;
348 if (place->flags & TTM_PL_FLAG_TOPDOWN)
349 mode = DRM_MM_INSERT_HIGH;
352 pages_left = mem->num_pages;
354 spin_lock(&mgr->lock);
355 for (i = 0; pages_left >= pages_per_node; ++i) {
356 unsigned long pages = rounddown_pow_of_two(pages_left);
358 r = drm_mm_insert_node_in_range(mm, &nodes[i], pages,
365 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
366 amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
370 for (; pages_left; ++i) {
371 unsigned long pages = min(pages_left, pages_per_node);
372 uint32_t alignment = mem->page_alignment;
374 if (pages == pages_per_node)
375 alignment = pages_per_node;
377 r = drm_mm_insert_node_in_range(mm, &nodes[i],
384 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
385 amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
388 spin_unlock(&mgr->lock);
390 atomic64_add(vis_usage, &mgr->vis_usage);
392 mem->mm_node = nodes;
398 drm_mm_remove_node(&nodes[i]);
399 spin_unlock(&mgr->lock);
400 atomic64_sub(mem->num_pages << PAGE_SHIFT, &mgr->usage);
403 return r == -ENOSPC ? 0 : r;
407 * amdgpu_vram_mgr_del - free ranges
409 * @man: TTM memory type manager
410 * @tbo: TTM BO we need this range for
411 * @place: placement flags and restrictions
412 * @mem: TTM memory object
414 * Free the allocated VRAM again.
416 static void amdgpu_vram_mgr_del(struct ttm_mem_type_manager *man,
417 struct ttm_mem_reg *mem)
419 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
420 struct amdgpu_vram_mgr *mgr = man->priv;
421 struct drm_mm_node *nodes = mem->mm_node;
422 uint64_t usage = 0, vis_usage = 0;
423 unsigned pages = mem->num_pages;
428 spin_lock(&mgr->lock);
430 pages -= nodes->size;
431 drm_mm_remove_node(nodes);
432 usage += nodes->size << PAGE_SHIFT;
433 vis_usage += amdgpu_vram_mgr_vis_size(adev, nodes);
436 spin_unlock(&mgr->lock);
438 atomic64_sub(usage, &mgr->usage);
439 atomic64_sub(vis_usage, &mgr->vis_usage);
441 kvfree(mem->mm_node);
446 * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table
448 * @adev: amdgpu device pointer
449 * @mem: TTM memory object
450 * @dev: the other device
451 * @dir: dma direction
452 * @sgt: resulting sg table
454 * Allocate and fill a sg table from a VRAM allocation.
456 int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
457 struct ttm_mem_reg *mem,
459 enum dma_data_direction dir,
460 struct sg_table **sgt)
462 struct drm_mm_node *node;
463 struct scatterlist *sg;
468 *sgt = kmalloc(sizeof(*sg), GFP_KERNEL);
472 for (pages = mem->num_pages, node = mem->mm_node;
473 pages; pages -= node->size, ++node)
476 r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL);
480 for_each_sg((*sgt)->sgl, sg, num_entries, i)
484 for_each_sg((*sgt)->sgl, sg, num_entries, i) {
485 phys_addr_t phys = (node->start << PAGE_SHIFT) +
487 size_t size = node->size << PAGE_SHIFT;
491 addr = dma_map_resource(dev, phys, size, dir,
492 DMA_ATTR_SKIP_CPU_SYNC);
493 r = dma_mapping_error(dev, addr);
497 sg_set_page(sg, NULL, size, 0);
498 sg_dma_address(sg) = addr;
499 sg_dma_len(sg) = size;
504 for_each_sg((*sgt)->sgl, sg, num_entries, i) {
508 dma_unmap_resource(dev, sg->dma_address,
510 DMA_ATTR_SKIP_CPU_SYNC);
520 * amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table
522 * @adev: amdgpu device pointer
523 * @sgt: sg table to free
525 * Free a previously allocate sg table.
527 void amdgpu_vram_mgr_free_sgt(struct amdgpu_device *adev,
529 enum dma_data_direction dir,
530 struct sg_table *sgt)
532 struct scatterlist *sg;
535 for_each_sg(sgt->sgl, sg, sgt->nents, i)
536 dma_unmap_resource(dev, sg->dma_address,
538 DMA_ATTR_SKIP_CPU_SYNC);
544 * amdgpu_vram_mgr_usage - how many bytes are used in this domain
546 * @man: TTM memory type manager
548 * Returns how many bytes are used in this domain.
550 uint64_t amdgpu_vram_mgr_usage(struct ttm_mem_type_manager *man)
552 struct amdgpu_vram_mgr *mgr = man->priv;
554 return atomic64_read(&mgr->usage);
558 * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
560 * @man: TTM memory type manager
562 * Returns how many bytes are used in the visible part of VRAM
564 uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_mem_type_manager *man)
566 struct amdgpu_vram_mgr *mgr = man->priv;
568 return atomic64_read(&mgr->vis_usage);
572 * amdgpu_vram_mgr_debug - dump VRAM table
574 * @man: TTM memory type manager
575 * @printer: DRM printer to use
577 * Dump the table content using printk.
579 static void amdgpu_vram_mgr_debug(struct ttm_mem_type_manager *man,
580 struct drm_printer *printer)
582 struct amdgpu_vram_mgr *mgr = man->priv;
584 spin_lock(&mgr->lock);
585 drm_mm_print(&mgr->mm, printer);
586 spin_unlock(&mgr->lock);
588 drm_printf(printer, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n",
589 man->size, amdgpu_vram_mgr_usage(man) >> 20,
590 amdgpu_vram_mgr_vis_usage(man) >> 20);
593 const struct ttm_mem_type_manager_func amdgpu_vram_mgr_func = {
594 .init = amdgpu_vram_mgr_init,
595 .takedown = amdgpu_vram_mgr_fini,
596 .get_node = amdgpu_vram_mgr_new,
597 .put_node = amdgpu_vram_mgr_del,
598 .debug = amdgpu_vram_mgr_debug