mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 11:26:40 +07:00
ecf6a63709
Signed-off-by: Ken Wang <Qingqing.Wang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
609 lines
14 KiB
C
609 lines
14 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
|
|
* All Rights Reserved.
|
|
*
|
|
* 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, sub license, 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 (including the
|
|
* next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
|
|
*
|
|
**************************************************************************/
|
|
|
|
#define pr_fmt(fmt) "[TTM] " fmt
|
|
|
|
#include <drm/ttm/ttm_memory.h>
|
|
#include <drm/ttm/ttm_module.h>
|
|
#include <drm/ttm/ttm_page_alloc.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
|
|
#define TTM_MEMORY_ALLOC_RETRIES 4
|
|
|
|
struct ttm_mem_zone {
|
|
struct kobject kobj;
|
|
struct ttm_mem_global *glob;
|
|
const char *name;
|
|
uint64_t zone_mem;
|
|
uint64_t emer_mem;
|
|
uint64_t max_mem;
|
|
uint64_t swap_limit;
|
|
uint64_t used_mem;
|
|
};
|
|
|
|
static struct attribute ttm_mem_sys = {
|
|
.name = "zone_memory",
|
|
.mode = S_IRUGO
|
|
};
|
|
static struct attribute ttm_mem_emer = {
|
|
.name = "emergency_memory",
|
|
.mode = S_IRUGO | S_IWUSR
|
|
};
|
|
static struct attribute ttm_mem_max = {
|
|
.name = "available_memory",
|
|
.mode = S_IRUGO | S_IWUSR
|
|
};
|
|
static struct attribute ttm_mem_swap = {
|
|
.name = "swap_limit",
|
|
.mode = S_IRUGO | S_IWUSR
|
|
};
|
|
static struct attribute ttm_mem_used = {
|
|
.name = "used_memory",
|
|
.mode = S_IRUGO
|
|
};
|
|
|
|
static void ttm_mem_zone_kobj_release(struct kobject *kobj)
|
|
{
|
|
struct ttm_mem_zone *zone =
|
|
container_of(kobj, struct ttm_mem_zone, kobj);
|
|
|
|
pr_info("Zone %7s: Used memory at exit: %llu kiB\n",
|
|
zone->name, (unsigned long long)zone->used_mem >> 10);
|
|
kfree(zone);
|
|
}
|
|
|
|
static ssize_t ttm_mem_zone_show(struct kobject *kobj,
|
|
struct attribute *attr,
|
|
char *buffer)
|
|
{
|
|
struct ttm_mem_zone *zone =
|
|
container_of(kobj, struct ttm_mem_zone, kobj);
|
|
uint64_t val = 0;
|
|
|
|
spin_lock(&zone->glob->lock);
|
|
if (attr == &ttm_mem_sys)
|
|
val = zone->zone_mem;
|
|
else if (attr == &ttm_mem_emer)
|
|
val = zone->emer_mem;
|
|
else if (attr == &ttm_mem_max)
|
|
val = zone->max_mem;
|
|
else if (attr == &ttm_mem_swap)
|
|
val = zone->swap_limit;
|
|
else if (attr == &ttm_mem_used)
|
|
val = zone->used_mem;
|
|
spin_unlock(&zone->glob->lock);
|
|
|
|
return snprintf(buffer, PAGE_SIZE, "%llu\n",
|
|
(unsigned long long) val >> 10);
|
|
}
|
|
|
|
static void ttm_check_swapping(struct ttm_mem_global *glob);
|
|
|
|
static ssize_t ttm_mem_zone_store(struct kobject *kobj,
|
|
struct attribute *attr,
|
|
const char *buffer,
|
|
size_t size)
|
|
{
|
|
struct ttm_mem_zone *zone =
|
|
container_of(kobj, struct ttm_mem_zone, kobj);
|
|
int chars;
|
|
unsigned long val;
|
|
uint64_t val64;
|
|
|
|
chars = sscanf(buffer, "%lu", &val);
|
|
if (chars == 0)
|
|
return size;
|
|
|
|
val64 = val;
|
|
val64 <<= 10;
|
|
|
|
spin_lock(&zone->glob->lock);
|
|
if (val64 > zone->zone_mem)
|
|
val64 = zone->zone_mem;
|
|
if (attr == &ttm_mem_emer) {
|
|
zone->emer_mem = val64;
|
|
if (zone->max_mem > val64)
|
|
zone->max_mem = val64;
|
|
} else if (attr == &ttm_mem_max) {
|
|
zone->max_mem = val64;
|
|
if (zone->emer_mem < val64)
|
|
zone->emer_mem = val64;
|
|
} else if (attr == &ttm_mem_swap)
|
|
zone->swap_limit = val64;
|
|
spin_unlock(&zone->glob->lock);
|
|
|
|
ttm_check_swapping(zone->glob);
|
|
|
|
return size;
|
|
}
|
|
|
|
static struct attribute *ttm_mem_zone_attrs[] = {
|
|
&ttm_mem_sys,
|
|
&ttm_mem_emer,
|
|
&ttm_mem_max,
|
|
&ttm_mem_swap,
|
|
&ttm_mem_used,
|
|
NULL
|
|
};
|
|
|
|
static const struct sysfs_ops ttm_mem_zone_ops = {
|
|
.show = &ttm_mem_zone_show,
|
|
.store = &ttm_mem_zone_store
|
|
};
|
|
|
|
static struct kobj_type ttm_mem_zone_kobj_type = {
|
|
.release = &ttm_mem_zone_kobj_release,
|
|
.sysfs_ops = &ttm_mem_zone_ops,
|
|
.default_attrs = ttm_mem_zone_attrs,
|
|
};
|
|
|
|
static void ttm_mem_global_kobj_release(struct kobject *kobj)
|
|
{
|
|
struct ttm_mem_global *glob =
|
|
container_of(kobj, struct ttm_mem_global, kobj);
|
|
|
|
kfree(glob);
|
|
}
|
|
|
|
static struct kobj_type ttm_mem_glob_kobj_type = {
|
|
.release = &ttm_mem_global_kobj_release,
|
|
};
|
|
|
|
static bool ttm_zones_above_swap_target(struct ttm_mem_global *glob,
|
|
bool from_wq, uint64_t extra)
|
|
{
|
|
unsigned int i;
|
|
struct ttm_mem_zone *zone;
|
|
uint64_t target;
|
|
|
|
for (i = 0; i < glob->num_zones; ++i) {
|
|
zone = glob->zones[i];
|
|
|
|
if (from_wq)
|
|
target = zone->swap_limit;
|
|
else if (capable(CAP_SYS_ADMIN))
|
|
target = zone->emer_mem;
|
|
else
|
|
target = zone->max_mem;
|
|
|
|
target = (extra > target) ? 0ULL : target;
|
|
|
|
if (zone->used_mem > target)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* At this point we only support a single shrink callback.
|
|
* Extend this if needed, perhaps using a linked list of callbacks.
|
|
* Note that this function is reentrant:
|
|
* many threads may try to swap out at any given time.
|
|
*/
|
|
|
|
static void ttm_shrink(struct ttm_mem_global *glob, bool from_wq,
|
|
uint64_t extra)
|
|
{
|
|
int ret;
|
|
struct ttm_mem_shrink *shrink;
|
|
|
|
spin_lock(&glob->lock);
|
|
if (glob->shrink == NULL)
|
|
goto out;
|
|
|
|
while (ttm_zones_above_swap_target(glob, from_wq, extra)) {
|
|
shrink = glob->shrink;
|
|
spin_unlock(&glob->lock);
|
|
ret = shrink->do_shrink(shrink);
|
|
spin_lock(&glob->lock);
|
|
if (unlikely(ret != 0))
|
|
goto out;
|
|
}
|
|
out:
|
|
spin_unlock(&glob->lock);
|
|
}
|
|
|
|
|
|
|
|
static void ttm_shrink_work(struct work_struct *work)
|
|
{
|
|
struct ttm_mem_global *glob =
|
|
container_of(work, struct ttm_mem_global, work);
|
|
|
|
ttm_shrink(glob, true, 0ULL);
|
|
}
|
|
|
|
static int ttm_mem_init_kernel_zone(struct ttm_mem_global *glob,
|
|
const struct sysinfo *si)
|
|
{
|
|
struct ttm_mem_zone *zone = kzalloc(sizeof(*zone), GFP_KERNEL);
|
|
uint64_t mem;
|
|
int ret;
|
|
|
|
if (unlikely(!zone))
|
|
return -ENOMEM;
|
|
|
|
mem = si->totalram - si->totalhigh;
|
|
mem *= si->mem_unit;
|
|
|
|
zone->name = "kernel";
|
|
zone->zone_mem = mem;
|
|
zone->max_mem = mem >> 1;
|
|
zone->emer_mem = (mem >> 1) + (mem >> 2);
|
|
zone->swap_limit = zone->max_mem - (mem >> 3);
|
|
zone->used_mem = 0;
|
|
zone->glob = glob;
|
|
glob->zone_kernel = zone;
|
|
ret = kobject_init_and_add(
|
|
&zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
|
|
if (unlikely(ret != 0)) {
|
|
kobject_put(&zone->kobj);
|
|
return ret;
|
|
}
|
|
glob->zones[glob->num_zones++] = zone;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
static int ttm_mem_init_highmem_zone(struct ttm_mem_global *glob,
|
|
const struct sysinfo *si)
|
|
{
|
|
struct ttm_mem_zone *zone;
|
|
uint64_t mem;
|
|
int ret;
|
|
|
|
if (si->totalhigh == 0)
|
|
return 0;
|
|
|
|
zone = kzalloc(sizeof(*zone), GFP_KERNEL);
|
|
if (unlikely(!zone))
|
|
return -ENOMEM;
|
|
|
|
mem = si->totalram;
|
|
mem *= si->mem_unit;
|
|
|
|
zone->name = "highmem";
|
|
zone->zone_mem = mem;
|
|
zone->max_mem = mem >> 1;
|
|
zone->emer_mem = (mem >> 1) + (mem >> 2);
|
|
zone->swap_limit = zone->max_mem - (mem >> 3);
|
|
zone->used_mem = 0;
|
|
zone->glob = glob;
|
|
glob->zone_highmem = zone;
|
|
ret = kobject_init_and_add(
|
|
&zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, "%s",
|
|
zone->name);
|
|
if (unlikely(ret != 0)) {
|
|
kobject_put(&zone->kobj);
|
|
return ret;
|
|
}
|
|
glob->zones[glob->num_zones++] = zone;
|
|
return 0;
|
|
}
|
|
#else
|
|
static int ttm_mem_init_dma32_zone(struct ttm_mem_global *glob,
|
|
const struct sysinfo *si)
|
|
{
|
|
struct ttm_mem_zone *zone = kzalloc(sizeof(*zone), GFP_KERNEL);
|
|
uint64_t mem;
|
|
int ret;
|
|
|
|
if (unlikely(!zone))
|
|
return -ENOMEM;
|
|
|
|
mem = si->totalram;
|
|
mem *= si->mem_unit;
|
|
|
|
/**
|
|
* No special dma32 zone needed.
|
|
*/
|
|
|
|
if (mem <= ((uint64_t) 1ULL << 32)) {
|
|
kfree(zone);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Limit max dma32 memory to 4GB for now
|
|
* until we can figure out how big this
|
|
* zone really is.
|
|
*/
|
|
|
|
mem = ((uint64_t) 1ULL << 32);
|
|
zone->name = "dma32";
|
|
zone->zone_mem = mem;
|
|
zone->max_mem = mem >> 1;
|
|
zone->emer_mem = (mem >> 1) + (mem >> 2);
|
|
zone->swap_limit = zone->max_mem - (mem >> 3);
|
|
zone->used_mem = 0;
|
|
zone->glob = glob;
|
|
glob->zone_dma32 = zone;
|
|
ret = kobject_init_and_add(
|
|
&zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
|
|
if (unlikely(ret != 0)) {
|
|
kobject_put(&zone->kobj);
|
|
return ret;
|
|
}
|
|
glob->zones[glob->num_zones++] = zone;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
int ttm_mem_global_init(struct ttm_mem_global *glob)
|
|
{
|
|
struct sysinfo si;
|
|
int ret;
|
|
int i;
|
|
struct ttm_mem_zone *zone;
|
|
|
|
spin_lock_init(&glob->lock);
|
|
glob->swap_queue = create_singlethread_workqueue("ttm_swap");
|
|
INIT_WORK(&glob->work, ttm_shrink_work);
|
|
ret = kobject_init_and_add(
|
|
&glob->kobj, &ttm_mem_glob_kobj_type, ttm_get_kobj(), "memory_accounting");
|
|
if (unlikely(ret != 0)) {
|
|
kobject_put(&glob->kobj);
|
|
return ret;
|
|
}
|
|
|
|
si_meminfo(&si);
|
|
|
|
ret = ttm_mem_init_kernel_zone(glob, &si);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_zone;
|
|
#ifdef CONFIG_HIGHMEM
|
|
ret = ttm_mem_init_highmem_zone(glob, &si);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_zone;
|
|
#else
|
|
ret = ttm_mem_init_dma32_zone(glob, &si);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_zone;
|
|
#endif
|
|
for (i = 0; i < glob->num_zones; ++i) {
|
|
zone = glob->zones[i];
|
|
pr_info("Zone %7s: Available graphics memory: %llu kiB\n",
|
|
zone->name, (unsigned long long)zone->max_mem >> 10);
|
|
}
|
|
ttm_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
|
|
ttm_dma_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
|
|
return 0;
|
|
out_no_zone:
|
|
ttm_mem_global_release(glob);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ttm_mem_global_init);
|
|
|
|
void ttm_mem_global_release(struct ttm_mem_global *glob)
|
|
{
|
|
unsigned int i;
|
|
struct ttm_mem_zone *zone;
|
|
|
|
/* let the page allocator first stop the shrink work. */
|
|
ttm_page_alloc_fini();
|
|
ttm_dma_page_alloc_fini();
|
|
|
|
flush_workqueue(glob->swap_queue);
|
|
destroy_workqueue(glob->swap_queue);
|
|
glob->swap_queue = NULL;
|
|
for (i = 0; i < glob->num_zones; ++i) {
|
|
zone = glob->zones[i];
|
|
kobject_del(&zone->kobj);
|
|
kobject_put(&zone->kobj);
|
|
}
|
|
kobject_del(&glob->kobj);
|
|
kobject_put(&glob->kobj);
|
|
}
|
|
EXPORT_SYMBOL(ttm_mem_global_release);
|
|
|
|
static void ttm_check_swapping(struct ttm_mem_global *glob)
|
|
{
|
|
bool needs_swapping = false;
|
|
unsigned int i;
|
|
struct ttm_mem_zone *zone;
|
|
|
|
spin_lock(&glob->lock);
|
|
for (i = 0; i < glob->num_zones; ++i) {
|
|
zone = glob->zones[i];
|
|
if (zone->used_mem > zone->swap_limit) {
|
|
needs_swapping = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
spin_unlock(&glob->lock);
|
|
|
|
if (unlikely(needs_swapping))
|
|
(void)queue_work(glob->swap_queue, &glob->work);
|
|
|
|
}
|
|
|
|
static void ttm_mem_global_free_zone(struct ttm_mem_global *glob,
|
|
struct ttm_mem_zone *single_zone,
|
|
uint64_t amount)
|
|
{
|
|
unsigned int i;
|
|
struct ttm_mem_zone *zone;
|
|
|
|
spin_lock(&glob->lock);
|
|
for (i = 0; i < glob->num_zones; ++i) {
|
|
zone = glob->zones[i];
|
|
if (single_zone && zone != single_zone)
|
|
continue;
|
|
zone->used_mem -= amount;
|
|
}
|
|
spin_unlock(&glob->lock);
|
|
}
|
|
|
|
void ttm_mem_global_free(struct ttm_mem_global *glob,
|
|
uint64_t amount)
|
|
{
|
|
return ttm_mem_global_free_zone(glob, NULL, amount);
|
|
}
|
|
EXPORT_SYMBOL(ttm_mem_global_free);
|
|
|
|
static int ttm_mem_global_reserve(struct ttm_mem_global *glob,
|
|
struct ttm_mem_zone *single_zone,
|
|
uint64_t amount, bool reserve)
|
|
{
|
|
uint64_t limit;
|
|
int ret = -ENOMEM;
|
|
unsigned int i;
|
|
struct ttm_mem_zone *zone;
|
|
|
|
spin_lock(&glob->lock);
|
|
for (i = 0; i < glob->num_zones; ++i) {
|
|
zone = glob->zones[i];
|
|
if (single_zone && zone != single_zone)
|
|
continue;
|
|
|
|
limit = (capable(CAP_SYS_ADMIN)) ?
|
|
zone->emer_mem : zone->max_mem;
|
|
|
|
if (zone->used_mem > limit)
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (reserve) {
|
|
for (i = 0; i < glob->num_zones; ++i) {
|
|
zone = glob->zones[i];
|
|
if (single_zone && zone != single_zone)
|
|
continue;
|
|
zone->used_mem += amount;
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
out_unlock:
|
|
spin_unlock(&glob->lock);
|
|
ttm_check_swapping(glob);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int ttm_mem_global_alloc_zone(struct ttm_mem_global *glob,
|
|
struct ttm_mem_zone *single_zone,
|
|
uint64_t memory,
|
|
bool no_wait, bool interruptible)
|
|
{
|
|
int count = TTM_MEMORY_ALLOC_RETRIES;
|
|
|
|
while (unlikely(ttm_mem_global_reserve(glob,
|
|
single_zone,
|
|
memory, true)
|
|
!= 0)) {
|
|
if (no_wait)
|
|
return -ENOMEM;
|
|
if (unlikely(count-- == 0))
|
|
return -ENOMEM;
|
|
ttm_shrink(glob, false, memory + (memory >> 2) + 16);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
|
|
bool no_wait, bool interruptible)
|
|
{
|
|
/**
|
|
* Normal allocations of kernel memory are registered in
|
|
* all zones.
|
|
*/
|
|
|
|
return ttm_mem_global_alloc_zone(glob, NULL, memory, no_wait,
|
|
interruptible);
|
|
}
|
|
EXPORT_SYMBOL(ttm_mem_global_alloc);
|
|
|
|
int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
|
|
struct page *page,
|
|
bool no_wait, bool interruptible)
|
|
{
|
|
|
|
struct ttm_mem_zone *zone = NULL;
|
|
|
|
/**
|
|
* Page allocations may be registed in a single zone
|
|
* only if highmem or !dma32.
|
|
*/
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
if (PageHighMem(page) && glob->zone_highmem != NULL)
|
|
zone = glob->zone_highmem;
|
|
#else
|
|
if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL)
|
|
zone = glob->zone_kernel;
|
|
#endif
|
|
return ttm_mem_global_alloc_zone(glob, zone, PAGE_SIZE, no_wait,
|
|
interruptible);
|
|
}
|
|
|
|
void ttm_mem_global_free_page(struct ttm_mem_global *glob, struct page *page)
|
|
{
|
|
struct ttm_mem_zone *zone = NULL;
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
if (PageHighMem(page) && glob->zone_highmem != NULL)
|
|
zone = glob->zone_highmem;
|
|
#else
|
|
if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL)
|
|
zone = glob->zone_kernel;
|
|
#endif
|
|
ttm_mem_global_free_zone(glob, zone, PAGE_SIZE);
|
|
}
|
|
|
|
|
|
size_t ttm_round_pot(size_t size)
|
|
{
|
|
if ((size & (size - 1)) == 0)
|
|
return size;
|
|
else if (size > PAGE_SIZE)
|
|
return PAGE_ALIGN(size);
|
|
else {
|
|
size_t tmp_size = 4;
|
|
|
|
while (tmp_size < size)
|
|
tmp_size <<= 1;
|
|
|
|
return tmp_size;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ttm_round_pot);
|
|
|
|
uint64_t ttm_get_kernel_zone_memory_size(struct ttm_mem_global *glob)
|
|
{
|
|
return glob->zone_kernel->max_mem;
|
|
}
|
|
EXPORT_SYMBOL(ttm_get_kernel_zone_memory_size);
|