276 lines
6.9 KiB
C
276 lines
6.9 KiB
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_gtt_mgr {
|
||
|
|
struct drm_mm mm;
|
||
|
|
spinlock_t lock;
|
||
|
|
atomic64_t available;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* amdgpu_gtt_mgr_init - init GTT manager and DRM MM
|
||
|
|
*
|
||
|
|
* @man: TTM memory type manager
|
||
|
|
* @p_size: maximum size of GTT
|
||
|
|
*
|
||
|
|
* Allocate and initialize the GTT manager.
|
||
|
|
*/
|
||
|
|
static int amdgpu_gtt_mgr_init(struct ttm_mem_type_manager *man,
|
||
|
|
unsigned long p_size)
|
||
|
|
{
|
||
|
|
struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
|
||
|
|
struct amdgpu_gtt_mgr *mgr;
|
||
|
|
uint64_t start, size;
|
||
|
|
|
||
|
|
mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
|
||
|
|
if (!mgr)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
|
||
|
|
size = (adev->mc.gart_size >> PAGE_SHIFT) - start;
|
||
|
|
drm_mm_init(&mgr->mm, start, size);
|
||
|
|
spin_lock_init(&mgr->lock);
|
||
|
|
atomic64_set(&mgr->available, p_size);
|
||
|
|
man->priv = mgr;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* amdgpu_gtt_mgr_fini - free and destroy GTT manager
|
||
|
|
*
|
||
|
|
* @man: TTM memory type manager
|
||
|
|
*
|
||
|
|
* Destroy and free the GTT manager, returns -EBUSY if ranges are still
|
||
|
|
* allocated inside it.
|
||
|
|
*/
|
||
|
|
static int amdgpu_gtt_mgr_fini(struct ttm_mem_type_manager *man)
|
||
|
|
{
|
||
|
|
struct amdgpu_gtt_mgr *mgr = man->priv;
|
||
|
|
|
||
|
|
drm_mm_takedown(&mgr->mm);
|
||
|
|
spin_unlock(&mgr->lock);
|
||
|
|
kfree(mgr);
|
||
|
|
man->priv = NULL;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* amdgpu_gtt_mgr_is_allocated - Check if mem has address space
|
||
|
|
*
|
||
|
|
* @mem: the mem object to check
|
||
|
|
*
|
||
|
|
* Check if a mem object has already address space allocated.
|
||
|
|
*/
|
||
|
|
bool amdgpu_gtt_mgr_is_allocated(struct ttm_mem_reg *mem)
|
||
|
|
{
|
||
|
|
struct drm_mm_node *node = mem->mm_node;
|
||
|
|
|
||
|
|
return (node->start != AMDGPU_BO_INVALID_OFFSET);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* amdgpu_gtt_mgr_alloc - 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 the address space for a node.
|
||
|
|
*/
|
||
|
|
static int amdgpu_gtt_mgr_alloc(struct ttm_mem_type_manager *man,
|
||
|
|
struct ttm_buffer_object *tbo,
|
||
|
|
const struct ttm_place *place,
|
||
|
|
struct ttm_mem_reg *mem)
|
||
|
|
{
|
||
|
|
struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
|
||
|
|
struct amdgpu_gtt_mgr *mgr = man->priv;
|
||
|
|
struct drm_mm_node *node = mem->mm_node;
|
||
|
|
enum drm_mm_insert_mode mode;
|
||
|
|
unsigned long fpfn, lpfn;
|
||
|
|
int r;
|
||
|
|
|
||
|
|
if (amdgpu_gtt_mgr_is_allocated(mem))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (place)
|
||
|
|
fpfn = place->fpfn;
|
||
|
|
else
|
||
|
|
fpfn = 0;
|
||
|
|
|
||
|
|
if (place && place->lpfn)
|
||
|
|
lpfn = place->lpfn;
|
||
|
|
else
|
||
|
|
lpfn = adev->gart.num_cpu_pages;
|
||
|
|
|
||
|
|
mode = DRM_MM_INSERT_BEST;
|
||
|
|
if (place && place->flags & TTM_PL_FLAG_TOPDOWN)
|
||
|
|
mode = DRM_MM_INSERT_HIGH;
|
||
|
|
|
||
|
|
spin_lock(&mgr->lock);
|
||
|
|
r = drm_mm_insert_node_in_range(&mgr->mm, node,
|
||
|
|
mem->num_pages, mem->page_alignment, 0,
|
||
|
|
fpfn, lpfn, mode);
|
||
|
|
spin_unlock(&mgr->lock);
|
||
|
|
|
||
|
|
if (!r)
|
||
|
|
mem->start = node->start;
|
||
|
|
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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
|
||
|
|
* @mem: the resulting mem object
|
||
|
|
*
|
||
|
|
* Dummy, allocate the node but no space for it yet.
|
||
|
|
*/
|
||
|
|
static int amdgpu_gtt_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_gtt_mgr *mgr = man->priv;
|
||
|
|
struct drm_mm_node *node;
|
||
|
|
int r;
|
||
|
|
|
||
|
|
spin_lock(&mgr->lock);
|
||
|
|
if ((&tbo->mem == mem || tbo->mem.mem_type != TTM_PL_TT) &&
|
||
|
|
atomic64_read(&mgr->available) < mem->num_pages) {
|
||
|
|
spin_unlock(&mgr->lock);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
atomic64_sub(mem->num_pages, &mgr->available);
|
||
|
|
spin_unlock(&mgr->lock);
|
||
|
|
|
||
|
|
node = kzalloc(sizeof(*node), GFP_KERNEL);
|
||
|
|
if (!node) {
|
||
|
|
r = -ENOMEM;
|
||
|
|
goto err_out;
|
||
|
|
}
|
||
|
|
|
||
|
|
node->start = AMDGPU_BO_INVALID_OFFSET;
|
||
|
|
node->size = mem->num_pages;
|
||
|
|
mem->mm_node = node;
|
||
|
|
|
||
|
|
if (place->fpfn || place->lpfn || place->flags & TTM_PL_FLAG_TOPDOWN) {
|
||
|
|
r = amdgpu_gtt_mgr_alloc(man, tbo, place, mem);
|
||
|
|
if (unlikely(r)) {
|
||
|
|
kfree(node);
|
||
|
|
mem->mm_node = NULL;
|
||
|
|
r = 0;
|
||
|
|
goto err_out;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
mem->start = node->start;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err_out:
|
||
|
|
atomic64_add(mem->num_pages, &mgr->available);
|
||
|
|
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* amdgpu_gtt_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 GTT again.
|
||
|
|
*/
|
||
|
|
static void amdgpu_gtt_mgr_del(struct ttm_mem_type_manager *man,
|
||
|
|
struct ttm_mem_reg *mem)
|
||
|
|
{
|
||
|
|
struct amdgpu_gtt_mgr *mgr = man->priv;
|
||
|
|
struct drm_mm_node *node = mem->mm_node;
|
||
|
|
|
||
|
|
if (!node)
|
||
|
|
return;
|
||
|
|
|
||
|
|
spin_lock(&mgr->lock);
|
||
|
|
if (node->start != AMDGPU_BO_INVALID_OFFSET)
|
||
|
|
drm_mm_remove_node(node);
|
||
|
|
spin_unlock(&mgr->lock);
|
||
|
|
atomic64_add(mem->num_pages, &mgr->available);
|
||
|
|
|
||
|
|
kfree(node);
|
||
|
|
mem->mm_node = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* amdgpu_gtt_mgr_usage - return usage of GTT domain
|
||
|
|
*
|
||
|
|
* @man: TTM memory type manager
|
||
|
|
*
|
||
|
|
* Return how many bytes are used in the GTT domain
|
||
|
|
*/
|
||
|
|
uint64_t amdgpu_gtt_mgr_usage(struct ttm_mem_type_manager *man)
|
||
|
|
{
|
||
|
|
struct amdgpu_gtt_mgr *mgr = man->priv;
|
||
|
|
s64 result = man->size - atomic64_read(&mgr->available);
|
||
|
|
|
||
|
|
return (result > 0 ? result : 0) * PAGE_SIZE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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_mem_type_manager *man,
|
||
|
|
struct drm_printer *printer)
|
||
|
|
{
|
||
|
|
struct amdgpu_gtt_mgr *mgr = man->priv;
|
||
|
|
|
||
|
|
spin_lock(&mgr->lock);
|
||
|
|
drm_mm_print(&mgr->mm, printer);
|
||
|
|
spin_unlock(&mgr->lock);
|
||
|
|
|
||
|
|
drm_printf(printer, "man size:%llu pages, gtt available:%lld pages, usage:%lluMB\n",
|
||
|
|
man->size, (u64)atomic64_read(&mgr->available),
|
||
|
|
amdgpu_gtt_mgr_usage(man) >> 20);
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct ttm_mem_type_manager_func amdgpu_gtt_mgr_func = {
|
||
|
|
.init = amdgpu_gtt_mgr_init,
|
||
|
|
.takedown = amdgpu_gtt_mgr_fini,
|
||
|
|
.get_node = amdgpu_gtt_mgr_new,
|
||
|
|
.put_node = amdgpu_gtt_mgr_del,
|
||
|
|
.debug = amdgpu_gtt_mgr_debug
|
||
|
|
};
|