Release 4.11 drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
/*
* Copyright 2016 Advanced Micro Devices, Inc.
*
* 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 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
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Christian König
*/
#include <drm/drmP.h>
#include "amdgpu.h"
struct amdgpu_vram_mgr {
struct drm_mm mm;
spinlock_t lock;
};
/**
* amdgpu_vram_mgr_init - init VRAM manager and DRM MM
*
* @man: TTM memory type manager
* @p_size: maximum size of VRAM
*
* Allocate and initialize the VRAM manager.
*/
static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
unsigned long p_size)
{
struct amdgpu_vram_mgr *mgr;
mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
if (!mgr)
return -ENOMEM;
drm_mm_init(&mgr->mm, 0, p_size);
spin_lock_init(&mgr->lock);
man->priv = mgr;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Christian König | 71 | 100.00% | 1 | 100.00% |
| Total | 71 | 100.00% | 1 | 100.00% |
/**
* amdgpu_vram_mgr_fini - free and destroy VRAM manager
*
* @man: TTM memory type manager
*
* Destroy and free the VRAM manager, returns -EBUSY if ranges are still
* allocated inside it.
*/
static int amdgpu_vram_mgr_fini(struct ttm_mem_type_manager *man)
{
struct amdgpu_vram_mgr *mgr = man->priv;
spin_lock(&mgr->lock);
if (!drm_mm_clean(&mgr->mm)) {
spin_unlock(&mgr->lock);
return -EBUSY;
}
drm_mm_takedown(&mgr->mm);
spin_unlock(&mgr->lock);
kfree(mgr);
man->priv = NULL;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Christian König | 83 | 100.00% | 1 | 100.00% |
| Total | 83 | 100.00% | 1 | 100.00% |
/**
* amdgpu_vram_mgr_new - allocate new ranges
*
* @man: TTM memory type manager
* @tbo: TTM BO we need this range for
* @place: placement flags and restrictions
* @mem: the resulting mem object
*
* Allocate VRAM for the given BO.
*/
static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
struct ttm_buffer_object *tbo,
const struct ttm_place *place,
struct ttm_mem_reg *mem)
{
struct amdgpu_bo *bo = container_of(tbo, struct amdgpu_bo, tbo);
struct amdgpu_vram_mgr *mgr = man->priv;
struct drm_mm *mm = &mgr->mm;
struct drm_mm_node *nodes;
enum drm_mm_insert_mode mode;
unsigned long lpfn, num_nodes, pages_per_node, pages_left;
unsigned i;
int r;
lpfn = place->lpfn;
if (!lpfn)
lpfn = man->size;
if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS ||
place->lpfn || amdgpu_vram_page_split == -1) {
pages_per_node = ~0ul;
num_nodes = 1;
} else {
pages_per_node = max((uint32_t)amdgpu_vram_page_split,
mem->page_alignment);
num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node);
}
nodes = kcalloc(num_nodes, sizeof(*nodes), GFP_KERNEL);
if (!nodes)
return -ENOMEM;
mode = DRM_MM_INSERT_BEST;
if (place->flags & TTM_PL_FLAG_TOPDOWN)
mode = DRM_MM_INSERT_HIGH;
pages_left = mem->num_pages;
spin_lock(&mgr->lock);
for (i = 0; i < num_nodes; ++i) {
unsigned long pages = min(pages_left, pages_per_node);
uint32_t alignment = mem->page_alignment;
if (pages == pages_per_node)
alignment = pages_per_node;
r = drm_mm_insert_node_in_range(mm, &nodes[i],
pages, alignment, 0,
place->fpfn, lpfn,
mode);
if (unlikely(r))
goto error;
pages_left -= pages;
}
spin_unlock(&mgr->lock);
mem->start = num_nodes == 1 ? nodes[0].start : AMDGPU_BO_INVALID_OFFSET;
mem->mm_node = nodes;
return 0;
error:
while (i--)
drm_mm_remove_node(&nodes[i]);
spin_unlock(&mgr->lock);
kfree(nodes);
return r == -ENOSPC ? 0 : r;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Christian König | 360 | 97.30% | 2 | 66.67% |
| Chris Wilson | 10 | 2.70% | 1 | 33.33% |
| Total | 370 | 100.00% | 3 | 100.00% |
/**
* amdgpu_vram_mgr_del - free ranges
*
* @man: TTM memory type manager
* @tbo: TTM BO we need this range for
* @place: placement flags and restrictions
* @mem: TTM memory object
*
* Free the allocated VRAM again.
*/
static void amdgpu_vram_mgr_del(struct ttm_mem_type_manager *man,
struct ttm_mem_reg *mem)
{
struct amdgpu_vram_mgr *mgr = man->priv;
struct drm_mm_node *nodes = mem->mm_node;
unsigned pages = mem->num_pages;
if (!mem->mm_node)
return;
spin_lock(&mgr->lock);
while (pages) {
pages -= nodes->size;
drm_mm_remove_node(nodes);
++nodes;
}
spin_unlock(&mgr->lock);
kfree(mem->mm_node);
mem->mm_node = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Christian König | 98 | 100.00% | 1 | 100.00% |
| Total | 98 | 100.00% | 1 | 100.00% |
/**
* amdgpu_vram_mgr_debug - dump VRAM table
*
* @man: TTM memory type manager
* @prefix: text prefix
*
* Dump the table content using printk.
*/
static void amdgpu_vram_mgr_debug(struct ttm_mem_type_manager *man,
const char *prefix)
{
struct amdgpu_vram_mgr *mgr = man->priv;
struct drm_printer p = drm_debug_printer(prefix);
spin_lock(&mgr->lock);
drm_mm_print(&mgr->mm, &p);
spin_unlock(&mgr->lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Christian König | 49 | 80.33% | 1 | 50.00% |
| Daniel Vetter | 12 | 19.67% | 1 | 50.00% |
| Total | 61 | 100.00% | 2 | 100.00% |
const struct ttm_mem_type_manager_func amdgpu_vram_mgr_func = {
amdgpu_vram_mgr_init,
amdgpu_vram_mgr_fini,
amdgpu_vram_mgr_new,
amdgpu_vram_mgr_del,
amdgpu_vram_mgr_debug
};
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Christian König | 702 | 96.96% | 2 | 50.00% |
| Daniel Vetter | 12 | 1.66% | 1 | 25.00% |
| Chris Wilson | 10 | 1.38% | 1 | 25.00% |
| Total | 724 | 100.00% | 4 | 100.00% |
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