Release 4.12 include/drm/ttm/ttm_memory.h
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#ifndef TTM_MEMORY_H
#define TTM_MEMORY_H
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include <linux/bug.h>
#include <linux/wait.h>
#include <linux/errno.h>
#include <linux/kobject.h>
#include <linux/mm.h>
/**
* struct ttm_mem_shrink - callback to shrink TTM memory usage.
*
* @do_shrink: The callback function.
*
* Arguments to the do_shrink functions are intended to be passed using
* inheritance. That is, the argument class derives from struct ttm_mem_shrink,
* and can be accessed using container_of().
*/
struct ttm_mem_shrink {
int (*do_shrink) (struct ttm_mem_shrink *);
};
/**
* struct ttm_mem_global - Global memory accounting structure.
*
* @shrink: A single callback to shrink TTM memory usage. Extend this
* to a linked list to be able to handle multiple callbacks when needed.
* @swap_queue: A workqueue to handle shrinking in low memory situations. We
* need a separate workqueue since it will spend a lot of time waiting
* for the GPU, and this will otherwise block other workqueue tasks(?)
* At this point we use only a single-threaded workqueue.
* @work: The workqueue callback for the shrink queue.
* @lock: Lock to protect the @shrink - and the memory accounting members,
* that is, essentially the whole structure with some exceptions.
* @zones: Array of pointers to accounting zones.
* @num_zones: Number of populated entries in the @zones array.
* @zone_kernel: Pointer to the kernel zone.
* @zone_highmem: Pointer to the highmem zone if there is one.
* @zone_dma32: Pointer to the dma32 zone if there is one.
*
* Note that this structure is not per device. It should be global for all
* graphics devices.
*/
#define TTM_MEM_MAX_ZONES 2
struct ttm_mem_zone;
struct ttm_mem_global {
struct kobject kobj;
struct ttm_mem_shrink *shrink;
struct workqueue_struct *swap_queue;
struct work_struct work;
spinlock_t lock;
struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES];
unsigned int num_zones;
struct ttm_mem_zone *zone_kernel;
#ifdef CONFIG_HIGHMEM
struct ttm_mem_zone *zone_highmem;
#else
struct ttm_mem_zone *zone_dma32;
#endif
};
/**
* ttm_mem_init_shrink - initialize a struct ttm_mem_shrink object
*
* @shrink: The object to initialize.
* @func: The callback function.
*/
static inline void ttm_mem_init_shrink(struct ttm_mem_shrink *shrink,
int (*func) (struct ttm_mem_shrink *))
{
shrink->do_shrink = func;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Hellstrom | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
/**
* ttm_mem_register_shrink - register a struct ttm_mem_shrink object.
*
* @glob: The struct ttm_mem_global object to register with.
* @shrink: An initialized struct ttm_mem_shrink object to register.
*
* Returns:
* -EBUSY: There's already a callback registered. (May change).
*/
static inline int ttm_mem_register_shrink(struct ttm_mem_global *glob,
struct ttm_mem_shrink *shrink)
{
spin_lock(&glob->lock);
if (glob->shrink != NULL) {
spin_unlock(&glob->lock);
return -EBUSY;
}
glob->shrink = shrink;
spin_unlock(&glob->lock);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Hellstrom | 64 | 100.00% | 1 | 100.00% |
| Total | 64 | 100.00% | 1 | 100.00% |
/**
* ttm_mem_unregister_shrink - unregister a struct ttm_mem_shrink object.
*
* @glob: The struct ttm_mem_global object to unregister from.
* @shrink: A previously registert struct ttm_mem_shrink object.
*
*/
static inline void ttm_mem_unregister_shrink(struct ttm_mem_global *glob,
struct ttm_mem_shrink *shrink)
{
spin_lock(&glob->lock);
BUG_ON(glob->shrink != shrink);
glob->shrink = NULL;
spin_unlock(&glob->lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Hellstrom | 48 | 100.00% | 1 | 100.00% |
| Total | 48 | 100.00% | 1 | 100.00% |
extern int ttm_mem_global_init(struct ttm_mem_global *glob);
extern void ttm_mem_global_release(struct ttm_mem_global *glob);
extern int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
bool no_wait, bool interruptible);
extern void ttm_mem_global_free(struct ttm_mem_global *glob,
uint64_t amount);
extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
struct page *page,
bool no_wait, bool interruptible);
extern void ttm_mem_global_free_page(struct ttm_mem_global *glob,
struct page *page);
extern size_t ttm_round_pot(size_t size);
extern uint64_t ttm_get_kernel_zone_memory_size(struct ttm_mem_global *glob);
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Hellstrom | 347 | 95.07% | 2 | 28.57% |
| Ken Wang | 10 | 2.74% | 1 | 14.29% |
| Paul Gortmaker | 3 | 0.82% | 1 | 14.29% |
| Martin Michlmayr | 3 | 0.82% | 1 | 14.29% |
| Marcin Ślusarz | 1 | 0.27% | 1 | 14.29% |
| Konrad Rzeszutek Wilk | 1 | 0.27% | 1 | 14.29% |
| Total | 365 | 100.00% | 7 | 100.00% |
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