/*
* 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/ttm/ttm_range_manager.h>
#include "amdgpu.h"
static inline struct amdgpu_gtt_mgr *
to_gtt_mgr(struct ttm_resource_manager *man)
{
return container_of(man, struct amdgpu_gtt_mgr, manager);
}
/**
* DOC: mem_info_gtt_total
*
* The amdgpu driver provides a sysfs API for reporting current total size of
* the GTT.
* The file mem_info_gtt_total is used for this, and returns the total size of
* the GTT block, in bytes
*/
static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
struct ttm_resource_manager *man;
man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
return sysfs_emit(buf, "%llu\n", man->size);
}
/**
* DOC: mem_info_gtt_used
*
* The amdgpu driver provides a sysfs API for reporting current total amount of
* used GTT.
* The file mem_info_gtt_used is used for this, and returns the current used
* size of the GTT block, in bytes
*/
static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
struct ttm_resource_manager *man = &adev->mman.gtt_mgr.manager;
return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man));
}
static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
amdgpu_mem_info_gtt_total_show, NULL);
static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO,
amdgpu_mem_info_gtt_used_show, NULL);
static struct attribute *amdgpu_gtt_mgr_attributes[] = {
&dev_attr_mem_info_gtt_total.attr,
&dev_attr_mem_info_gtt_used.attr,
NULL
};
const struct attribute_group amdgpu_gtt_mgr_attr_group = {
.attrs = amdgpu_gtt_mgr_attributes
};
/**
* amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space
*
* @res: the mem object to check
*
* Check if a mem object has already address space allocated.
*/
bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *res)
{
struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res);
return drm_mm_node_allocated(&node->mm_nodes[0]);
}
/**
* amdgpu_gtt_mgr_new - allocate a new node
*
* @man: TTM memory type manager
* @tbo: TTM BO we need this range for
* @place: placement flags and restrictions
* @res: the resulting mem object
*
* Dummy, allocate the node but no space for it yet.
*/
static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man,
struct ttm_buffer_object *tbo,
const struct ttm_place *place,
struct ttm_resource **res)
{
struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
uint32_t num_pages = PFN_UP(tbo->base.size);
struct ttm_range_mgr_node *node;
int r;
node = kzalloc(struct_size(node, mm_nodes, 1), GFP_KERNEL);
if (!node)
return -ENOMEM;
ttm_resource_init(tbo, place, &node->base);
if (!(place->flags & TTM_PL_FLAG_TEMPORARY) &&
ttm_resource_manager_usage(man) > man->size) {
r = -ENOSPC;
goto err_free;
}
if (place->lpfn) {
spin_lock(&mgr->lock);
r = drm_mm_insert_node_in_range(&mgr->mm, &node->mm_nodes[0],
num_pages, tbo->page_alignment,
0, place->fpfn, place->lpfn,
DRM_MM_INSERT_BEST);
spin_unlock(&mgr->lock);
if (unlikely(r))
goto err_free;
node->base.start = node->mm_nodes[0].start;
} else {
node->mm_nodes[0].start = 0;
node->mm_nodes[0].size = PFN_UP(node->base.size);
node->base.start = AMDGPU_BO_INVALID_OFFSET;
}
*res = &node->base;
return 0;
err_free:
ttm_resource_fini(man, &node->base);
kfree(node);
return r;
}
/**
* amdgpu_gtt_mgr_del - free ranges
*
* @man: TTM memory type manager
* @res: TTM memory object
*
* Free the allocated GTT again.
*/
static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man,
struct ttm_resource *res)
{
struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res);
struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
spin_lock(&mgr->lock);
if (drm_mm_node_allocated(&node->mm_nodes[0]))
drm_mm_remove_node(&node->mm_nodes[0]);
spin_unlock(&mgr->lock);
ttm_resource_fini(man, res);
kfree(node);
}
/**
* amdgpu_gtt_mgr_recover - re-init gart
*
* @mgr: amdgpu_gtt_mgr pointer
*
* Re-init the gart for each known BO in the GTT.
*/
void amdgpu_gtt_mgr_recover(struct amdgpu_gtt_mgr *mgr)
{
struct ttm_range_mgr_node *node;
struct drm_mm_node *mm_node;
struct amdgpu_device *adev;
adev = container_of(mgr, typeof(*adev), mman.gtt_mgr);
spin_lock(&mgr->lock);
drm_mm_for_each_node(mm_node, &mgr->mm) {
node = container_of(mm_node, typeof(*node), mm_nodes[0]);
amdgpu_ttm_recover_gart(node->base.bo);
}
spin_unlock(&mgr->lock);
}
/**
* amdgpu_gtt_mgr_intersects - test for intersection
*
* @man: Our manager object
* @res: The resource to test
* @place: The place for the new allocation
* @size: The size of the new allocation
*
* Simplified intersection test, only interesting if we need GART or not.
*/
static bool amdgpu_gtt_mgr_intersects(struct ttm_resource_manager *man,
struct ttm_resource *res,
const struct ttm_place *place,
size_t size)
{
return !place->lpfn || amdgpu_gtt_mgr_has_gart_addr(res);
}
/**
* amdgpu_gtt_mgr_compatible - test for compatibility
*
* @man: Our manager object
* @res: The resource to test
* @place: The place for the new allocation
* @size: The size of the new allocation
*
* Simplified compatibility test.
*/
static bool amdgpu_gtt_mgr_compatible(struct ttm_resource_manager *man,
struct ttm_resource *res,
const struct ttm_place *place,
size_t size)
{
return !place->lpfn || amdgpu_gtt_mgr_has_gart_addr(res);
}
/**
* amdgpu_gtt_mgr_debug - dump VRAM table
*
* @man: TTM memory type manager
* @printer: DRM printer to use
*
* Dump the table content using printk.
*/
static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man,
struct drm_printer *printer)
{
struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
spin_lock(&mgr->lock);
drm_mm_print(&mgr->mm, printer);
spin_unlock(&mgr->lock);
}
static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = {
.alloc = amdgpu_gtt_mgr_new,
.free = amdgpu_gtt_mgr_del,
.intersects = amdgpu_gtt_mgr_intersects,
.compatible = amdgpu_gtt_mgr_compatible,
.debug = amdgpu_gtt_mgr_debug
};
/**
* amdgpu_gtt_mgr_init - init GTT manager and DRM MM
*
* @adev: amdgpu_device pointer
* @gtt_size: maximum size of GTT
*
* Allocate and initialize the GTT manager.
*/
int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
{
struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
struct ttm_resource_manager *man = &mgr->manager;
uint64_t start, size;
man->use_tt = true;
man->func = &amdgpu_gtt_mgr_func;
ttm_resource_manager_init(man, &adev->mman.bdev, gtt_size);
start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
size = (adev->gmc.gart_size >> PAGE_SHIFT) - start;
drm_mm_init(&mgr->mm, start, size);
spin_lock_init(&mgr->lock);
ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager);
ttm_resource_manager_set_used(man, true);
return 0;
}
/**
* amdgpu_gtt_mgr_fini - free and destroy GTT manager
*
* @adev: amdgpu_device pointer
*
* Destroy and free the GTT manager, returns -EBUSY if ranges are still
* allocated inside it.
*/
void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev)
{
struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
struct ttm_resource_manager *man = &mgr->manager;
int ret;
ttm_resource_manager_set_used(man, false);
ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
if (ret)
return;
spin_lock(&mgr->lock);
drm_mm_takedown(&mgr->mm);
spin_unlock(&mgr->lock);
ttm_resource_manager_cleanup(man);
ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL);
}
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