#define pr_fmt(fmt) "ion-page-pool: " fmt
#include <linux/debugfs.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/shrinker.h>
#include "ion_priv.h"
/* #define DEBUG_PAGE_POOL_SHRINKER */
static struct plist_head pools = PLIST_HEAD_INIT(pools);
static struct shrinker shrinker;
struct ion_page_pool_item {
struct page *page;
struct list_head list;
};
static void *ion_page_pool_alloc_pages(struct ion_page_pool *pool)
{
struct page *page = alloc_pages(pool->gfp_mask, pool->order);
if (!page)
return NULL;
/* this is only being used to flush the page for dma,
this api is not really suitable for calling from a driver
#include <linux/string.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/export.h>
#include <linux/seq_file.h>
DEFINE_SPINLOCK(pm_qos_lock);
static struct pm_qos_object null_pm_qos;
static BLOCKING_NOTIFIER_HEAD(cpu_dma_lat_notifier);
static struct pm_qos_constraints cpu_dma_constraints = {
.list = PLIST_HEAD_INIT(cpu_dma_constraints.list),
.target_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
.default_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
.type = PM_QOS_MIN,
.notifiers = &cpu_dma_lat_notifier,
};
static struct pm_qos_object cpu_dma_pm_qos = {
.constraints = &cpu_dma_constraints,
.name = "cpu_dma_latency",
};
static BLOCKING_NOTIFIER_HEAD(network_lat_notifier);
static struct pm_qos_constraints network_lat_constraints = {
.list = PLIST_HEAD_INIT(network_lat_constraints.list),
.target_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
.default_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
