BlueGreycalmElegant

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Compare Revisions

• This comparison shows the changes necessary to convert path

  → /drivers/ @ 3261

  → /drivers/ @ 3262

  ↔ Reverse comparison

• Compare Path:	Rev

  With Path:	Rev

Ignore whitespace Rev 3261 → Rev 3262

/drivers/include/ddk.h
13,8 → 13,11
#define OS_BASE 0x80000000
#define PG_SW 0x003
#define PG_NOCACHE 0x010
#define PG_UW 0x007
#define PG_NOCACHE 0x018
#define PG_SHARED 0x200
#define MANUAL_DESTROY 0x80000000
#define ENTER() dbgprintf("enter %s\n",__FUNCTION__)

/drivers/include/drm/drmP.h
171,7 → 171,7
/** \name Begin the DRM... */
/*@{*/
#define DRM_DEBUG_CODE 0 /**< Include debugging code if > 1, then
#define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then
also include looping detection. */
#define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
959,9 → 959,14
#define DRM_IRQ_ARGS int irq, void *arg
struct drm_driver {
int (*open) (struct drm_device *, struct drm_file *);
irqreturn_t (*irq_handler) (DRM_IRQ_ARGS);
void (*irq_preinstall) (struct drm_device *dev);
int (*irq_postinstall) (struct drm_device *dev);
int (*gem_init_object) (struct drm_gem_object *obj);
void (*gem_free_object) (struct drm_gem_object *obj);
int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
};

/drivers/include/drm/drm_crtc.h
244,6 → 244,16
struct drm_framebuffer {
struct drm_device *dev;
/*
* Note that the fb is refcounted for the benefit of driver internals,
* for example some hw, disabling a CRTC/plane is asynchronous, and
* scanout does not actually complete until the next vblank. So some
* cleanup (like releasing the reference(s) on the backing GEM bo(s))
* should be deferred. In cases like this, the driver would like to
* hold a ref to the fb even though it has already been removed from
* userspace perspective.
*/
struct kref refcount;
struct list_head head;
struct drm_mode_object base;
const struct drm_framebuffer_funcs *funcs;

/drivers/include/drm/ttm/ttm_bo_api.h
1,643 → 1,742
/**************************************************************************
*
* 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.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#ifndef _TTM_BO_API_H_
#define _TTM_BO_API_H_
#include "drm_hashtab.h"
#include <linux/kref.h>
#include <linux/list.h>
//#include <linux/wait.h>
#include <linux/mutex.h>
//#include <linux/mm.h>
//#include <linux/rbtree.h>
#include <linux/bitmap.h>
struct ttm_bo_device;
struct drm_mm_node;
/**
* struct ttm_placement
*
* @fpfn: first valid page frame number to put the object
* @lpfn: last valid page frame number to put the object
* @num_placement: number of prefered placements
* @placement: prefered placements
* @num_busy_placement: number of prefered placements when need to evict buffer
* @busy_placement: prefered placements when need to evict buffer
*
* Structure indicating the placement you request for an object.
*/
struct ttm_placement {
unsigned fpfn;
unsigned lpfn;
unsigned num_placement;
const uint32_t *placement;
unsigned num_busy_placement;
const uint32_t *busy_placement;
};
/**
* struct ttm_mem_reg
*
* @mm_node: Memory manager node.
* @size: Requested size of memory region.
* @num_pages: Actual size of memory region in pages.
* @page_alignment: Page alignment.
* @placement: Placement flags.
*
* Structure indicating the placement and space resources used by a
* buffer object.
*/
struct ttm_mem_reg {
void *mm_node;
unsigned long start;
unsigned long size;
unsigned long num_pages;
uint32_t page_alignment;
uint32_t mem_type;
uint32_t placement;
// struct ttm_bus_placement bus;
};
/**
* enum ttm_bo_type
*
* @ttm_bo_type_device: These are 'normal' buffers that can
* be mmapped by user space. Each of these bos occupy a slot in the
* device address space, that can be used for normal vm operations.
*
* @ttm_bo_type_user: These are user-space memory areas that are made
* available to the GPU by mapping the buffer pages into the GPU aperture
* space. These buffers cannot be mmaped from the device address space.
*
* @ttm_bo_type_kernel: These buffers are like ttm_bo_type_device buffers,
* but they cannot be accessed from user-space. For kernel-only use.
*/
enum ttm_bo_type {
ttm_bo_type_device,
ttm_bo_type_user,
ttm_bo_type_kernel
};
struct ttm_tt;
/**
* struct ttm_buffer_object
*
* @bdev: Pointer to the buffer object device structure.
* @buffer_start: The virtual user-space start address of ttm_bo_type_user
* buffers.
* @type: The bo type.
* @destroy: Destruction function. If NULL, kfree is used.
* @num_pages: Actual number of pages.
* @addr_space_offset: Address space offset.
* @acc_size: Accounted size for this object.
* @kref: Reference count of this buffer object. When this refcount reaches
* zero, the object is put on the delayed delete list.
* @list_kref: List reference count of this buffer object. This member is
* used to avoid destruction while the buffer object is still on a list.
* Lru lists may keep one refcount, the delayed delete list, and kref != 0
* keeps one refcount. When this refcount reaches zero,
* the object is destroyed.
* @event_queue: Queue for processes waiting on buffer object status change.
* @lock: spinlock protecting mostly synchronization members.
* @mem: structure describing current placement.
* @persistant_swap_storage: Usually the swap storage is deleted for buffers
* pinned in physical memory. If this behaviour is not desired, this member
* holds a pointer to a persistant shmem object.
* @ttm: TTM structure holding system pages.
* @evicted: Whether the object was evicted without user-space knowing.
* @cpu_writes: For synchronization. Number of cpu writers.
* @lru: List head for the lru list.
* @ddestroy: List head for the delayed destroy list.
* @swap: List head for swap LRU list.
* @val_seq: Sequence of the validation holding the @reserved lock.
* Used to avoid starvation when many processes compete to validate the
* buffer. This member is protected by the bo_device::lru_lock.
* @seq_valid: The value of @val_seq is valid. This value is protected by
* the bo_device::lru_lock.
* @reserved: Deadlock-free lock used for synchronization state transitions.
* @sync_obj_arg: Opaque argument to synchronization object function.
* @sync_obj: Pointer to a synchronization object.
* @priv_flags: Flags describing buffer object internal state.
* @vm_rb: Rb node for the vm rb tree.
* @vm_node: Address space manager node.
* @offset: The current GPU offset, which can have different meanings
* depending on the memory type. For SYSTEM type memory, it should be 0.
* @cur_placement: Hint of current placement.
*
* Base class for TTM buffer object, that deals with data placement and CPU
* mappings. GPU mappings are really up to the driver, but for simpler GPUs
* the driver can usually use the placement offset @offset directly as the
* GPU virtual address. For drivers implementing multiple
* GPU memory manager contexts, the driver should manage the address space
* in these contexts separately and use these objects to get the correct
* placement and caching for these GPU maps. This makes it possible to use
* these objects for even quite elaborate memory management schemes.
* The destroy member, the API visibility of this object makes it possible
* to derive driver specific types.
*/
struct ttm_buffer_object {
/**
* Members constant at init.
*/
struct ttm_bo_global *glob;
struct ttm_bo_device *bdev;
unsigned long buffer_start;
enum ttm_bo_type type;
void (*destroy) (struct ttm_buffer_object *);
unsigned long num_pages;
uint64_t addr_space_offset;
size_t acc_size;
/**
* Members not needing protection.
*/
struct kref kref;
struct kref list_kref;
// wait_queue_head_t event_queue;
spinlock_t lock;
/**
* Members protected by the bo::reserved lock.
*/
struct ttm_mem_reg mem;
// struct file *persistant_swap_storage;
struct ttm_tt *ttm;
bool evicted;
/**
* Members protected by the bo::reserved lock only when written to.
*/
atomic_t cpu_writers;
/**
* Members protected by the bdev::lru_lock.
*/
struct list_head lru;
struct list_head ddestroy;
struct list_head swap;
uint32_t val_seq;
bool seq_valid;
/**
* Members protected by the bdev::lru_lock
* only when written to.
*/
atomic_t reserved;
/**
* Members protected by the bo::lock
*/
void *sync_obj_arg;
void *sync_obj;
unsigned long priv_flags;
/**
* Members protected by the bdev::vm_lock
*/
// struct rb_node vm_rb;
struct drm_mm_node *vm_node;
/**
* Special members that are protected by the reserve lock
* and the bo::lock when written to. Can be read with
* either of these locks held.
*/
unsigned long offset;
uint32_t cur_placement;
};
/**
* struct ttm_bo_kmap_obj
*
* @virtual: The current kernel virtual address.
* @page: The page when kmap'ing a single page.
* @bo_kmap_type: Type of bo_kmap.
*
* Object describing a kernel mapping. Since a TTM bo may be located
* in various memory types with various caching policies, the
* mapping can either be an ioremap, a vmap, a kmap or part of a
* premapped region.
*/
#define TTM_BO_MAP_IOMEM_MASK 0x80
struct ttm_bo_kmap_obj {
void *virtual;
struct page *page;
enum {
ttm_bo_map_iomap = 1 | TTM_BO_MAP_IOMEM_MASK,
ttm_bo_map_vmap = 2,
ttm_bo_map_kmap = 3,
ttm_bo_map_premapped = 4 | TTM_BO_MAP_IOMEM_MASK,
} bo_kmap_type;
};
/**
* ttm_bo_reference - reference a struct ttm_buffer_object
*
* @bo: The buffer object.
*
* Returns a refcounted pointer to a buffer object.
*/
static inline struct ttm_buffer_object *
ttm_bo_reference(struct ttm_buffer_object *bo)
{
kref_get(&bo->kref);
return bo;
}
/**
* ttm_bo_wait - wait for buffer idle.
*
* @bo: The buffer object.
* @interruptible: Use interruptible wait.
* @no_wait: Return immediately if buffer is busy.
*
* This function must be called with the bo::mutex held, and makes
* sure any previous rendering to the buffer is completed.
* Note: It might be necessary to block validations before the
* wait by reserving the buffer.
* Returns -EBUSY if no_wait is true and the buffer is busy.
* Returns -ERESTARTSYS if interrupted by a signal.
*/
extern int ttm_bo_wait(struct ttm_buffer_object *bo, bool lazy,
bool interruptible, bool no_wait);
/**
* ttm_bo_validate
*
* @bo: The buffer object.
* @placement: Proposed placement for the buffer object.
* @interruptible: Sleep interruptible if sleeping.
* @no_wait_reserve: Return immediately if other buffers are busy.
* @no_wait_gpu: Return immediately if the GPU is busy.
*
* Changes placement and caching policy of the buffer object
* according proposed placement.
* Returns
* -EINVAL on invalid proposed placement.
* -ENOMEM on out-of-memory condition.
* -EBUSY if no_wait is true and buffer busy.
* -ERESTARTSYS if interrupted by a signal.
*/
extern int ttm_bo_validate(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
bool interruptible, bool no_wait_reserve,
bool no_wait_gpu);
/**
* ttm_bo_unref
*
* @bo: The buffer object.
*
* Unreference and clear a pointer to a buffer object.
*/
extern void ttm_bo_unref(struct ttm_buffer_object **bo);
/**
* ttm_bo_synccpu_write_grab
*
* @bo: The buffer object:
* @no_wait: Return immediately if buffer is busy.
*
* Synchronizes a buffer object for CPU RW access. This means
* blocking command submission that affects the buffer and
* waiting for buffer idle. This lock is recursive.
* Returns
* -EBUSY if the buffer is busy and no_wait is true.
* -ERESTARTSYS if interrupted by a signal.
*/
extern int
ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait);
/**
* ttm_bo_synccpu_write_release:
*
* @bo : The buffer object.
*
* Releases a synccpu lock.
*/
extern void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo);
/**
* ttm_bo_init
*
* @bdev: Pointer to a ttm_bo_device struct.
* @bo: Pointer to a ttm_buffer_object to be initialized.
* @size: Requested size of buffer object.
* @type: Requested type of buffer object.
* @flags: Initial placement flags.
* @page_alignment: Data alignment in pages.
* @buffer_start: Virtual address of user space data backing a
* user buffer object.
* @interruptible: If needing to sleep to wait for GPU resources,
* sleep interruptible.
* @persistent_swap_storage: Usually the swap storage is deleted for buffers
* pinned in physical memory. If this behaviour is not desired, this member
* holds a pointer to a persistent shmem object. Typically, this would
* point to the shmem object backing a GEM object if TTM is used to back a
* GEM user interface.
* @acc_size: Accounted size for this object.
* @destroy: Destroy function. Use NULL for kfree().
*
* This function initializes a pre-allocated struct ttm_buffer_object.
* As this object may be part of a larger structure, this function,
* together with the @destroy function,
* enables driver-specific objects derived from a ttm_buffer_object.
* On successful return, the object kref and list_kref are set to 1.
* If a failure occurs, the function will call the @destroy function, or
* kfree() if @destroy is NULL. Thus, after a failure, dereferencing @bo is
* illegal and will likely cause memory corruption.
*
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid placement flags.
* -ERESTARTSYS: Interrupted by signal while sleeping waiting for resources.
*/
extern int ttm_bo_init(struct ttm_bo_device *bdev,
struct ttm_buffer_object *bo,
unsigned long size,
enum ttm_bo_type type,
struct ttm_placement *placement,
uint32_t page_alignment,
unsigned long buffer_start,
bool interrubtible,
struct file *persistent_swap_storage,
size_t acc_size,
void (*destroy) (struct ttm_buffer_object *));
/**
* ttm_bo_synccpu_object_init
*
* @bdev: Pointer to a ttm_bo_device struct.
* @bo: Pointer to a ttm_buffer_object to be initialized.
* @size: Requested size of buffer object.
* @type: Requested type of buffer object.
* @flags: Initial placement flags.
* @page_alignment: Data alignment in pages.
* @buffer_start: Virtual address of user space data backing a
* user buffer object.
* @interruptible: If needing to sleep while waiting for GPU resources,
* sleep interruptible.
* @persistent_swap_storage: Usually the swap storage is deleted for buffers
* pinned in physical memory. If this behaviour is not desired, this member
* holds a pointer to a persistent shmem object. Typically, this would
* point to the shmem object backing a GEM object if TTM is used to back a
* GEM user interface.
* @p_bo: On successful completion *p_bo points to the created object.
*
* This function allocates a ttm_buffer_object, and then calls ttm_bo_init
* on that object. The destroy function is set to kfree().
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid placement flags.
* -ERESTARTSYS: Interrupted by signal while waiting for resources.
*/
extern int ttm_bo_create(struct ttm_bo_device *bdev,
unsigned long size,
enum ttm_bo_type type,
struct ttm_placement *placement,
uint32_t page_alignment,
unsigned long buffer_start,
bool interruptible,
struct file *persistent_swap_storage,
struct ttm_buffer_object **p_bo);
/**
* ttm_bo_check_placement
*
* @bo: the buffer object.
* @placement: placements
*
* Performs minimal validity checking on an intended change of
* placement flags.
* Returns
* -EINVAL: Intended change is invalid or not allowed.
*/
extern int ttm_bo_check_placement(struct ttm_buffer_object *bo,
struct ttm_placement *placement);
/**
* ttm_bo_init_mm
*
* @bdev: Pointer to a ttm_bo_device struct.
* @mem_type: The memory type.
* @p_size: size managed area in pages.
*
* Initialize a manager for a given memory type.
* Note: if part of driver firstopen, it must be protected from a
* potentially racing lastclose.
* Returns:
* -EINVAL: invalid size or memory type.
* -ENOMEM: Not enough memory.
* May also return driver-specified errors.
*/
extern int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
unsigned long p_size);
/**
* ttm_bo_clean_mm
*
* @bdev: Pointer to a ttm_bo_device struct.
* @mem_type: The memory type.
*
* Take down a manager for a given memory type after first walking
* the LRU list to evict any buffers left alive.
*
* Normally, this function is part of lastclose() or unload(), and at that
* point there shouldn't be any buffers left created by user-space, since
* there should've been removed by the file descriptor release() method.
* However, before this function is run, make sure to signal all sync objects,
* and verify that the delayed delete queue is empty. The driver must also
* make sure that there are no NO_EVICT buffers present in this memory type
* when the call is made.
*
* If this function is part of a VT switch, the caller must make sure that
* there are no appications currently validating buffers before this
* function is called. The caller can do that by first taking the
* struct ttm_bo_device::ttm_lock in write mode.
*
* Returns:
* -EINVAL: invalid or uninitialized memory type.
* -EBUSY: There are still buffers left in this memory type.
*/
extern int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type);
/**
* ttm_bo_evict_mm
*
* @bdev: Pointer to a ttm_bo_device struct.
* @mem_type: The memory type.
*
* Evicts all buffers on the lru list of the memory type.
* This is normally part of a VT switch or an
* out-of-memory-space-due-to-fragmentation handler.
* The caller must make sure that there are no other processes
* currently validating buffers, and can do that by taking the
* struct ttm_bo_device::ttm_lock in write mode.
*
* Returns:
* -EINVAL: Invalid or uninitialized memory type.
* -ERESTARTSYS: The call was interrupted by a signal while waiting to
* evict a buffer.
*/
extern int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type);
/**
* ttm_kmap_obj_virtual
*
* @map: A struct ttm_bo_kmap_obj returned from ttm_bo_kmap.
* @is_iomem: Pointer to an integer that on return indicates 1 if the
* virtual map is io memory, 0 if normal memory.
*
* Returns the virtual address of a buffer object area mapped by ttm_bo_kmap.
* If *is_iomem is 1 on return, the virtual address points to an io memory area,
* that should strictly be accessed by the iowriteXX() and similar functions.
*/
static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map,
bool *is_iomem)
{
*is_iomem = !!(map->bo_kmap_type & TTM_BO_MAP_IOMEM_MASK);
return map->virtual;
}
/**
* ttm_bo_kmap
*
* @bo: The buffer object.
* @start_page: The first page to map.
* @num_pages: Number of pages to map.
* @map: pointer to a struct ttm_bo_kmap_obj representing the map.
*
* Sets up a kernel virtual mapping, using ioremap, vmap or kmap to the
* data in the buffer object. The ttm_kmap_obj_virtual function can then be
* used to obtain a virtual address to the data.
*
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid range.
*/
extern int ttm_bo_kmap(struct ttm_buffer_object *bo, unsigned long start_page,
unsigned long num_pages, struct ttm_bo_kmap_obj *map);
/**
* ttm_bo_kunmap
*
* @map: Object describing the map to unmap.
*
* Unmaps a kernel map set up by ttm_bo_kmap.
*/
extern void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map);
#if 0
#endif
/**
* ttm_fbdev_mmap - mmap fbdev memory backed by a ttm buffer object.
*
* @vma: vma as input from the fbdev mmap method.
* @bo: The bo backing the address space. The address space will
* have the same size as the bo, and start at offset 0.
*
* This function is intended to be called by the fbdev mmap method
* if the fbdev address space is to be backed by a bo.
*/
extern int ttm_fbdev_mmap(struct vm_area_struct *vma,
struct ttm_buffer_object *bo);
/**
* ttm_bo_mmap - mmap out of the ttm device address space.
*
* @filp: filp as input from the mmap method.
* @vma: vma as input from the mmap method.
* @bdev: Pointer to the ttm_bo_device with the address space manager.
*
* This function is intended to be called by the device mmap method.
* if the device address space is to be backed by the bo manager.
*/
extern int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
struct ttm_bo_device *bdev);
/**
* ttm_bo_io
*
* @bdev: Pointer to the struct ttm_bo_device.
* @filp: Pointer to the struct file attempting to read / write.
* @wbuf: User-space pointer to address of buffer to write. NULL on read.
* @rbuf: User-space pointer to address of buffer to read into.
* Null on write.
* @count: Number of bytes to read / write.
* @f_pos: Pointer to current file position.
* @write: 1 for read, 0 for write.
*
* This function implements read / write into ttm buffer objects, and is
* intended to
* be called from the fops::read and fops::write method.
* Returns:
* See man (2) write, man(2) read. In particular,
* the function may return -ERESTARTSYS if
* interrupted by a signal.
*/
extern ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp,
const char __user *wbuf, char __user *rbuf,
size_t count, loff_t *f_pos, bool write);
extern void ttm_bo_swapout_all(struct ttm_bo_device *bdev);
#endif
/**************************************************************************
*
* 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.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#ifndef _TTM_BO_API_H_
#define _TTM_BO_API_H_
#include <drm/drm_hashtab.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/wait.h>
#include <linux/mutex.h>
#include <linux/mm.h>
#include <linux/rbtree.h>
#include <linux/bitmap.h>
struct ttm_bo_device;
struct drm_mm_node;
/**
* struct ttm_placement
*
* @fpfn: first valid page frame number to put the object
* @lpfn: last valid page frame number to put the object
* @num_placement: number of preferred placements
* @placement: preferred placements
* @num_busy_placement: number of preferred placements when need to evict buffer
* @busy_placement: preferred placements when need to evict buffer
*
* Structure indicating the placement you request for an object.
*/
struct ttm_placement {
unsigned fpfn;
unsigned lpfn;
unsigned num_placement;
const uint32_t *placement;
unsigned num_busy_placement;
const uint32_t *busy_placement;
};
/**
* struct ttm_bus_placement
*
* @addr: mapped virtual address
* @base: bus base address
* @is_iomem: is this io memory ?
* @size: size in byte
* @offset: offset from the base address
* @io_reserved_vm: The VM system has a refcount in @io_reserved_count
* @io_reserved_count: Refcounting the numbers of callers to ttm_mem_io_reserve
*
* Structure indicating the bus placement of an object.
*/
struct ttm_bus_placement {
void *addr;
unsigned long base;
unsigned long size;
unsigned long offset;
bool is_iomem;
bool io_reserved_vm;
uint64_t io_reserved_count;
};
/**
* struct ttm_mem_reg
*
* @mm_node: Memory manager node.
* @size: Requested size of memory region.
* @num_pages: Actual size of memory region in pages.
* @page_alignment: Page alignment.
* @placement: Placement flags.
* @bus: Placement on io bus accessible to the CPU
*
* Structure indicating the placement and space resources used by a
* buffer object.
*/
struct ttm_mem_reg {
void *mm_node;
unsigned long start;
unsigned long size;
unsigned long num_pages;
uint32_t page_alignment;
uint32_t mem_type;
uint32_t placement;
struct ttm_bus_placement bus;
};
/**
* enum ttm_bo_type
*
* @ttm_bo_type_device: These are 'normal' buffers that can
* be mmapped by user space. Each of these bos occupy a slot in the
* device address space, that can be used for normal vm operations.
*
* @ttm_bo_type_kernel: These buffers are like ttm_bo_type_device buffers,
* but they cannot be accessed from user-space. For kernel-only use.
*
* @ttm_bo_type_sg: Buffer made from dmabuf sg table shared with another
* driver.
*/
enum ttm_bo_type {
ttm_bo_type_device,
ttm_bo_type_kernel,
ttm_bo_type_sg
};
struct ttm_tt;
/**
* struct ttm_buffer_object
*
* @bdev: Pointer to the buffer object device structure.
* @type: The bo type.
* @destroy: Destruction function. If NULL, kfree is used.
* @num_pages: Actual number of pages.
* @addr_space_offset: Address space offset.
* @acc_size: Accounted size for this object.
* @kref: Reference count of this buffer object. When this refcount reaches
* zero, the object is put on the delayed delete list.
* @list_kref: List reference count of this buffer object. This member is
* used to avoid destruction while the buffer object is still on a list.
* Lru lists may keep one refcount, the delayed delete list, and kref != 0
* keeps one refcount. When this refcount reaches zero,
* the object is destroyed.
* @event_queue: Queue for processes waiting on buffer object status change.
* @mem: structure describing current placement.
* @persistent_swap_storage: Usually the swap storage is deleted for buffers
* pinned in physical memory. If this behaviour is not desired, this member
* holds a pointer to a persistent shmem object.
* @ttm: TTM structure holding system pages.
* @evicted: Whether the object was evicted without user-space knowing.
* @cpu_writes: For synchronization. Number of cpu writers.
* @lru: List head for the lru list.
* @ddestroy: List head for the delayed destroy list.
* @swap: List head for swap LRU list.
* @val_seq: Sequence of the validation holding the @reserved lock.
* Used to avoid starvation when many processes compete to validate the
* buffer. This member is protected by the bo_device::lru_lock.
* @seq_valid: The value of @val_seq is valid. This value is protected by
* the bo_device::lru_lock.
* @reserved: Deadlock-free lock used for synchronization state transitions.
* @sync_obj: Pointer to a synchronization object.
* @priv_flags: Flags describing buffer object internal state.
* @vm_rb: Rb node for the vm rb tree.
* @vm_node: Address space manager node.
* @offset: The current GPU offset, which can have different meanings
* depending on the memory type. For SYSTEM type memory, it should be 0.
* @cur_placement: Hint of current placement.
*
* Base class for TTM buffer object, that deals with data placement and CPU
* mappings. GPU mappings are really up to the driver, but for simpler GPUs
* the driver can usually use the placement offset @offset directly as the
* GPU virtual address. For drivers implementing multiple
* GPU memory manager contexts, the driver should manage the address space
* in these contexts separately and use these objects to get the correct
* placement and caching for these GPU maps. This makes it possible to use
* these objects for even quite elaborate memory management schemes.
* The destroy member, the API visibility of this object makes it possible
* to derive driver specific types.
*/
struct ttm_buffer_object {
/**
* Members constant at init.
*/
struct ttm_bo_global *glob;
struct ttm_bo_device *bdev;
enum ttm_bo_type type;
void (*destroy) (struct ttm_buffer_object *);
unsigned long num_pages;
uint64_t addr_space_offset;
size_t acc_size;
/**
* Members not needing protection.
*/
struct kref kref;
struct kref list_kref;
wait_queue_head_t event_queue;
/**
* Members protected by the bo::reserved lock.
*/
struct ttm_mem_reg mem;
struct file *persistent_swap_storage;
struct ttm_tt *ttm;
bool evicted;
/**
* Members protected by the bo::reserved lock only when written to.
*/
atomic_t cpu_writers;
/**
* Members protected by the bdev::lru_lock.
*/
struct list_head lru;
struct list_head ddestroy;
struct list_head swap;
struct list_head io_reserve_lru;
uint32_t val_seq;
bool seq_valid;
/**
* Members protected by the bdev::lru_lock
* only when written to.
*/
atomic_t reserved;
/**
* Members protected by struct buffer_object_device::fence_lock
* In addition, setting sync_obj to anything else
* than NULL requires bo::reserved to be held. This allows for
* checking NULL while reserved but not holding the mentioned lock.
*/
void *sync_obj;
unsigned long priv_flags;
/**
* Members protected by the bdev::vm_lock
*/
// struct rb_node vm_rb;
struct drm_mm_node *vm_node;
/**
* Special members that are protected by the reserve lock
* and the bo::lock when written to. Can be read with
* either of these locks held.
*/
unsigned long offset;
uint32_t cur_placement;
struct sg_table *sg;
};
/**
* struct ttm_bo_kmap_obj
*
* @virtual: The current kernel virtual address.
* @page: The page when kmap'ing a single page.
* @bo_kmap_type: Type of bo_kmap.
*
* Object describing a kernel mapping. Since a TTM bo may be located
* in various memory types with various caching policies, the
* mapping can either be an ioremap, a vmap, a kmap or part of a
* premapped region.
*/
#define TTM_BO_MAP_IOMEM_MASK 0x80
struct ttm_bo_kmap_obj {
void *virtual;
struct page *page;
enum {
ttm_bo_map_iomap = 1 | TTM_BO_MAP_IOMEM_MASK,
ttm_bo_map_vmap = 2,
ttm_bo_map_kmap = 3,
ttm_bo_map_premapped = 4 | TTM_BO_MAP_IOMEM_MASK,
} bo_kmap_type;
struct ttm_buffer_object *bo;
};
/**
* ttm_bo_reference - reference a struct ttm_buffer_object
*
* @bo: The buffer object.
*
* Returns a refcounted pointer to a buffer object.
*/
static inline struct ttm_buffer_object *
ttm_bo_reference(struct ttm_buffer_object *bo)
{
kref_get(&bo->kref);
return bo;
}
/**
* ttm_bo_wait - wait for buffer idle.
*
* @bo: The buffer object.
* @interruptible: Use interruptible wait.
* @no_wait: Return immediately if buffer is busy.
*
* This function must be called with the bo::mutex held, and makes
* sure any previous rendering to the buffer is completed.
* Note: It might be necessary to block validations before the
* wait by reserving the buffer.
* Returns -EBUSY if no_wait is true and the buffer is busy.
* Returns -ERESTARTSYS if interrupted by a signal.
*/
extern int ttm_bo_wait(struct ttm_buffer_object *bo, bool lazy,
bool interruptible, bool no_wait);
/**
* ttm_bo_validate
*
* @bo: The buffer object.
* @placement: Proposed placement for the buffer object.
* @interruptible: Sleep interruptible if sleeping.
* @no_wait_gpu: Return immediately if the GPU is busy.
*
* Changes placement and caching policy of the buffer object
* according proposed placement.
* Returns
* -EINVAL on invalid proposed placement.
* -ENOMEM on out-of-memory condition.
* -EBUSY if no_wait is true and buffer busy.
* -ERESTARTSYS if interrupted by a signal.
*/
extern int ttm_bo_validate(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
bool interruptible,
bool no_wait_gpu);
/**
* ttm_bo_unref
*
* @bo: The buffer object.
*
* Unreference and clear a pointer to a buffer object.
*/
extern void ttm_bo_unref(struct ttm_buffer_object **bo);
/**
* ttm_bo_list_ref_sub
*
* @bo: The buffer object.
* @count: The number of references with which to decrease @bo::list_kref;
* @never_free: The refcount should not reach zero with this operation.
*
* Release @count lru list references to this buffer object.
*/
extern void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count,
bool never_free);
/**
* ttm_bo_add_to_lru
*
* @bo: The buffer object.
*
* Add this bo to the relevant mem type lru and, if it's backed by
* system pages (ttms) to the swap list.
* This function must be called with struct ttm_bo_global::lru_lock held, and
* is typically called immediately prior to unreserving a bo.
*/
extern void ttm_bo_add_to_lru(struct ttm_buffer_object *bo);
/**
* ttm_bo_del_from_lru
*
* @bo: The buffer object.
*
* Remove this bo from all lru lists used to lookup and reserve an object.
* This function must be called with struct ttm_bo_global::lru_lock held,
* and is usually called just immediately after the bo has been reserved to
* avoid recursive reservation from lru lists.
*/
extern int ttm_bo_del_from_lru(struct ttm_buffer_object *bo);
/**
* ttm_bo_lock_delayed_workqueue
*
* Prevent the delayed workqueue from running.
* Returns
* True if the workqueue was queued at the time
*/
extern int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev);
/**
* ttm_bo_unlock_delayed_workqueue
*
* Allows the delayed workqueue to run.
*/
extern void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev,
int resched);
/**
* ttm_bo_synccpu_write_grab
*
* @bo: The buffer object:
* @no_wait: Return immediately if buffer is busy.
*
* Synchronizes a buffer object for CPU RW access. This means
* command submission that affects the buffer will return -EBUSY
* until ttm_bo_synccpu_write_release is called.
*
* Returns
* -EBUSY if the buffer is busy and no_wait is true.
* -ERESTARTSYS if interrupted by a signal.
*/
extern int
ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait);
/**
* ttm_bo_synccpu_write_release:
*
* @bo : The buffer object.
*
* Releases a synccpu lock.
*/
extern void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo);
/**
* ttm_bo_acc_size
*
* @bdev: Pointer to a ttm_bo_device struct.
* @bo_size: size of the buffer object in byte.
* @struct_size: size of the structure holding buffer object datas
*
* Returns size to account for a buffer object
*/
size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
unsigned long bo_size,
unsigned struct_size);
size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
unsigned long bo_size,
unsigned struct_size);
/**
* ttm_bo_init
*
* @bdev: Pointer to a ttm_bo_device struct.
* @bo: Pointer to a ttm_buffer_object to be initialized.
* @size: Requested size of buffer object.
* @type: Requested type of buffer object.
* @flags: Initial placement flags.
* @page_alignment: Data alignment in pages.
* @interruptible: If needing to sleep to wait for GPU resources,
* sleep interruptible.
* @persistent_swap_storage: Usually the swap storage is deleted for buffers
* pinned in physical memory. If this behaviour is not desired, this member
* holds a pointer to a persistent shmem object. Typically, this would
* point to the shmem object backing a GEM object if TTM is used to back a
* GEM user interface.
* @acc_size: Accounted size for this object.
* @destroy: Destroy function. Use NULL for kfree().
*
* This function initializes a pre-allocated struct ttm_buffer_object.
* As this object may be part of a larger structure, this function,
* together with the @destroy function,
* enables driver-specific objects derived from a ttm_buffer_object.
* On successful return, the object kref and list_kref are set to 1.
* If a failure occurs, the function will call the @destroy function, or
* kfree() if @destroy is NULL. Thus, after a failure, dereferencing @bo is
* illegal and will likely cause memory corruption.
*
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid placement flags.
* -ERESTARTSYS: Interrupted by signal while sleeping waiting for resources.
*/
extern int ttm_bo_init(struct ttm_bo_device *bdev,
struct ttm_buffer_object *bo,
unsigned long size,
enum ttm_bo_type type,
struct ttm_placement *placement,
uint32_t page_alignment,
bool interrubtible,
struct file *persistent_swap_storage,
size_t acc_size,
struct sg_table *sg,
void (*destroy) (struct ttm_buffer_object *));
/**
* ttm_bo_synccpu_object_init
*
* @bdev: Pointer to a ttm_bo_device struct.
* @bo: Pointer to a ttm_buffer_object to be initialized.
* @size: Requested size of buffer object.
* @type: Requested type of buffer object.
* @flags: Initial placement flags.
* @page_alignment: Data alignment in pages.
* @interruptible: If needing to sleep while waiting for GPU resources,
* sleep interruptible.
* @persistent_swap_storage: Usually the swap storage is deleted for buffers
* pinned in physical memory. If this behaviour is not desired, this member
* holds a pointer to a persistent shmem object. Typically, this would
* point to the shmem object backing a GEM object if TTM is used to back a
* GEM user interface.
* @p_bo: On successful completion *p_bo points to the created object.
*
* This function allocates a ttm_buffer_object, and then calls ttm_bo_init
* on that object. The destroy function is set to kfree().
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid placement flags.
* -ERESTARTSYS: Interrupted by signal while waiting for resources.
*/
extern int ttm_bo_create(struct ttm_bo_device *bdev,
unsigned long size,
enum ttm_bo_type type,
struct ttm_placement *placement,
uint32_t page_alignment,
bool interruptible,
struct file *persistent_swap_storage,
struct ttm_buffer_object **p_bo);
/**
* ttm_bo_check_placement
*
* @bo: the buffer object.
* @placement: placements
*
* Performs minimal validity checking on an intended change of
* placement flags.
* Returns
* -EINVAL: Intended change is invalid or not allowed.
*/
extern int ttm_bo_check_placement(struct ttm_buffer_object *bo,
struct ttm_placement *placement);
/**
* ttm_bo_init_mm
*
* @bdev: Pointer to a ttm_bo_device struct.
* @mem_type: The memory type.
* @p_size: size managed area in pages.
*
* Initialize a manager for a given memory type.
* Note: if part of driver firstopen, it must be protected from a
* potentially racing lastclose.
* Returns:
* -EINVAL: invalid size or memory type.
* -ENOMEM: Not enough memory.
* May also return driver-specified errors.
*/
extern int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
unsigned long p_size);
/**
* ttm_bo_clean_mm
*
* @bdev: Pointer to a ttm_bo_device struct.
* @mem_type: The memory type.
*
* Take down a manager for a given memory type after first walking
* the LRU list to evict any buffers left alive.
*
* Normally, this function is part of lastclose() or unload(), and at that
* point there shouldn't be any buffers left created by user-space, since
* there should've been removed by the file descriptor release() method.
* However, before this function is run, make sure to signal all sync objects,
* and verify that the delayed delete queue is empty. The driver must also
* make sure that there are no NO_EVICT buffers present in this memory type
* when the call is made.
*
* If this function is part of a VT switch, the caller must make sure that
* there are no appications currently validating buffers before this
* function is called. The caller can do that by first taking the
* struct ttm_bo_device::ttm_lock in write mode.
*
* Returns:
* -EINVAL: invalid or uninitialized memory type.
* -EBUSY: There are still buffers left in this memory type.
*/
extern int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type);
/**
* ttm_bo_evict_mm
*
* @bdev: Pointer to a ttm_bo_device struct.
* @mem_type: The memory type.
*
* Evicts all buffers on the lru list of the memory type.
* This is normally part of a VT switch or an
* out-of-memory-space-due-to-fragmentation handler.
* The caller must make sure that there are no other processes
* currently validating buffers, and can do that by taking the
* struct ttm_bo_device::ttm_lock in write mode.
*
* Returns:
* -EINVAL: Invalid or uninitialized memory type.
* -ERESTARTSYS: The call was interrupted by a signal while waiting to
* evict a buffer.
*/
extern int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type);
/**
* ttm_kmap_obj_virtual
*
* @map: A struct ttm_bo_kmap_obj returned from ttm_bo_kmap.
* @is_iomem: Pointer to an integer that on return indicates 1 if the
* virtual map is io memory, 0 if normal memory.
*
* Returns the virtual address of a buffer object area mapped by ttm_bo_kmap.
* If *is_iomem is 1 on return, the virtual address points to an io memory area,
* that should strictly be accessed by the iowriteXX() and similar functions.
*/
static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map,
bool *is_iomem)
{
*is_iomem = !!(map->bo_kmap_type & TTM_BO_MAP_IOMEM_MASK);
return map->virtual;
}
/**
* ttm_bo_kmap
*
* @bo: The buffer object.
* @start_page: The first page to map.
* @num_pages: Number of pages to map.
* @map: pointer to a struct ttm_bo_kmap_obj representing the map.
*
* Sets up a kernel virtual mapping, using ioremap, vmap or kmap to the
* data in the buffer object. The ttm_kmap_obj_virtual function can then be
* used to obtain a virtual address to the data.
*
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid range.
*/
extern int ttm_bo_kmap(struct ttm_buffer_object *bo, unsigned long start_page,
unsigned long num_pages, struct ttm_bo_kmap_obj *map);
/**
* ttm_bo_kunmap
*
* @map: Object describing the map to unmap.
*
* Unmaps a kernel map set up by ttm_bo_kmap.
*/
extern void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map);
/**
* ttm_fbdev_mmap - mmap fbdev memory backed by a ttm buffer object.
*
* @vma: vma as input from the fbdev mmap method.
* @bo: The bo backing the address space. The address space will
* have the same size as the bo, and start at offset 0.
*
* This function is intended to be called by the fbdev mmap method
* if the fbdev address space is to be backed by a bo.
*/
extern int ttm_fbdev_mmap(struct vm_area_struct *vma,
struct ttm_buffer_object *bo);
/**
* ttm_bo_mmap - mmap out of the ttm device address space.
*
* @filp: filp as input from the mmap method.
* @vma: vma as input from the mmap method.
* @bdev: Pointer to the ttm_bo_device with the address space manager.
*
* This function is intended to be called by the device mmap method.
* if the device address space is to be backed by the bo manager.
*/
extern int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
struct ttm_bo_device *bdev);
/**
* ttm_bo_io
*
* @bdev: Pointer to the struct ttm_bo_device.
* @filp: Pointer to the struct file attempting to read / write.
* @wbuf: User-space pointer to address of buffer to write. NULL on read.
* @rbuf: User-space pointer to address of buffer to read into.
* Null on write.
* @count: Number of bytes to read / write.
* @f_pos: Pointer to current file position.
* @write: 1 for read, 0 for write.
*
* This function implements read / write into ttm buffer objects, and is
* intended to
* be called from the fops::read and fops::write method.
* Returns:
* See man (2) write, man(2) read. In particular,
* the function may return -ERESTARTSYS if
* interrupted by a signal.
*/
extern ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp,
const char __user *wbuf, char __user *rbuf,
size_t count, loff_t *f_pos, bool write);
extern void ttm_bo_swapout_all(struct ttm_bo_device *bdev);
/**
* ttm_bo_is_reserved - return an indication if a ttm buffer object is reserved
*
* @bo: The buffer object to check.
*
* This function returns an indication if a bo is reserved or not, and should
* only be used to print an error when it is not from incorrect api usage, since
* there's no guarantee that it is the caller that is holding the reservation.
*/
static inline bool ttm_bo_is_reserved(struct ttm_buffer_object *bo)
{
return atomic_read(&bo->reserved);
}
#endif

/drivers/include/drm/ttm/ttm_bo_driver.h
1,929 → 1,1011
/**************************************************************************
*
* 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.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#ifndef _TTM_BO_DRIVER_H_
#define _TTM_BO_DRIVER_H_
#include "ttm/ttm_bo_api.h"
#include "ttm/ttm_memory.h"
#include "ttm/ttm_module.h"
#include "drm_mm.h"
#include "linux/spinlock.h"
struct ttm_backend;
struct ttm_backend_func {
/**
* struct ttm_backend_func member populate
*
* @backend: Pointer to a struct ttm_backend.
* @num_pages: Number of pages to populate.
* @pages: Array of pointers to ttm pages.
* @dummy_read_page: Page to be used instead of NULL pages in the
* array @pages.
*
* Populate the backend with ttm pages. Depending on the backend,
* it may or may not copy the @pages array.
*/
int (*populate) (struct ttm_backend *backend,
unsigned long num_pages, struct page **pages,
struct page *dummy_read_page,
dma_addr_t *dma_addrs);
/**
* struct ttm_backend_func member clear
*
* @backend: Pointer to a struct ttm_backend.
*
* This is an "unpopulate" function. Release all resources
* allocated with populate.
*/
void (*clear) (struct ttm_backend *backend);
/**
* struct ttm_backend_func member bind
*
* @backend: Pointer to a struct ttm_backend.
* @bo_mem: Pointer to a struct ttm_mem_reg describing the
* memory type and location for binding.
*
* Bind the backend pages into the aperture in the location
* indicated by @bo_mem. This function should be able to handle
* differences between aperture- and system page sizes.
*/
int (*bind) (struct ttm_backend *backend, struct ttm_mem_reg *bo_mem);
/**
* struct ttm_backend_func member unbind
*
* @backend: Pointer to a struct ttm_backend.
*
* Unbind previously bound backend pages. This function should be
* able to handle differences between aperture- and system page sizes.
*/
int (*unbind) (struct ttm_backend *backend);
/**
* struct ttm_backend_func member destroy
*
* @backend: Pointer to a struct ttm_backend.
*
* Destroy the backend.
*/
void (*destroy) (struct ttm_backend *backend);
};
/**
* struct ttm_backend
*
* @bdev: Pointer to a struct ttm_bo_device.
* @flags: For driver use.
* @func: Pointer to a struct ttm_backend_func that describes
* the backend methods.
*
*/
struct ttm_backend {
struct ttm_bo_device *bdev;
uint32_t flags;
struct ttm_backend_func *func;
};
#define TTM_PAGE_FLAG_USER (1 << 1)
#define TTM_PAGE_FLAG_USER_DIRTY (1 << 2)
#define TTM_PAGE_FLAG_WRITE (1 << 3)
#define TTM_PAGE_FLAG_SWAPPED (1 << 4)
#define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5)
#define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6)
#define TTM_PAGE_FLAG_DMA32 (1 << 7)
enum ttm_caching_state {
tt_uncached,
tt_wc,
tt_cached
};
/**
* struct ttm_tt
*
* @dummy_read_page: Page to map where the ttm_tt page array contains a NULL
* pointer.
* @pages: Array of pages backing the data.
* @first_himem_page: Himem pages are put last in the page array, which
* enables us to run caching attribute changes on only the first part
* of the page array containing lomem pages. This is the index of the
* first himem page.
* @last_lomem_page: Index of the last lomem page in the page array.
* @num_pages: Number of pages in the page array.
* @bdev: Pointer to the current struct ttm_bo_device.
* @be: Pointer to the ttm backend.
* @tsk: The task for user ttm.
* @start: virtual address for user ttm.
* @swap_storage: Pointer to shmem struct file for swap storage.
* @caching_state: The current caching state of the pages.
* @state: The current binding state of the pages.
* @dma_address: The DMA (bus) addresses of the pages (if TTM_PAGE_FLAG_DMA32)
*
* This is a structure holding the pages, caching- and aperture binding
* status for a buffer object that isn't backed by fixed (VRAM / AGP)
* memory.
*/
struct ttm_tt {
struct page *dummy_read_page;
struct page **pages;
long first_himem_page;
long last_lomem_page;
uint32_t page_flags;
unsigned long num_pages;
struct ttm_bo_global *glob;
struct ttm_backend *be;
struct task_struct *tsk;
unsigned long start;
struct file *swap_storage;
enum ttm_caching_state caching_state;
enum {
tt_bound,
tt_unbound,
tt_unpopulated,
} state;
dma_addr_t *dma_address;
};
#define TTM_MEMTYPE_FLAG_FIXED (1 << 0) /* Fixed (on-card) PCI memory */
#define TTM_MEMTYPE_FLAG_MAPPABLE (1 << 1) /* Memory mappable */
#define TTM_MEMTYPE_FLAG_CMA (1 << 3) /* Can't map aperture */
/**
* struct ttm_mem_type_manager
*
* @has_type: The memory type has been initialized.
* @use_type: The memory type is enabled.
* @flags: TTM_MEMTYPE_XX flags identifying the traits of the memory
* managed by this memory type.
* @gpu_offset: If used, the GPU offset of the first managed page of
* fixed memory or the first managed location in an aperture.
* @size: Size of the managed region.
* @available_caching: A mask of available caching types, TTM_PL_FLAG_XX,
* as defined in ttm_placement_common.h
* @default_caching: The default caching policy used for a buffer object
* placed in this memory type if the user doesn't provide one.
* @func: structure pointer implementing the range manager. See above
* @priv: Driver private closure for @func.
* @io_reserve_mutex: Mutex optionally protecting shared io_reserve structures
* @use_io_reserve_lru: Use an lru list to try to unreserve io_mem_regions
* reserved by the TTM vm system.
* @io_reserve_lru: Optional lru list for unreserving io mem regions.
* @io_reserve_fastpath: Only use bdev::driver::io_mem_reserve to obtain
* static information. bdev::driver::io_mem_free is never used.
* @lru: The lru list for this memory type.
*
* This structure is used to identify and manage memory types for a device.
* It's set up by the ttm_bo_driver::init_mem_type method.
*/
struct ttm_mem_type_manager {
struct ttm_bo_device *bdev;
/*
* No protection. Constant from start.
*/
bool has_type;
bool use_type;
uint32_t flags;
unsigned long gpu_offset;
uint64_t size;
uint32_t available_caching;
uint32_t default_caching;
const struct ttm_mem_type_manager_func *func;
void *priv;
struct mutex io_reserve_mutex;
bool use_io_reserve_lru;
bool io_reserve_fastpath;
/*
* Protected by @io_reserve_mutex:
*/
struct list_head io_reserve_lru;
/*
* Protected by the global->lru_lock.
*/
struct list_head lru;
};
/**
* struct ttm_bo_driver
*
* @create_ttm_backend_entry: Callback to create a struct ttm_backend.
* @invalidate_caches: Callback to invalidate read caches when a buffer object
* has been evicted.
* @init_mem_type: Callback to initialize a struct ttm_mem_type_manager
* structure.
* @evict_flags: Callback to obtain placement flags when a buffer is evicted.
* @move: Callback for a driver to hook in accelerated functions to
* move a buffer.
* If set to NULL, a potentially slow memcpy() move is used.
* @sync_obj_signaled: See ttm_fence_api.h
* @sync_obj_wait: See ttm_fence_api.h
* @sync_obj_flush: See ttm_fence_api.h
* @sync_obj_unref: See ttm_fence_api.h
* @sync_obj_ref: See ttm_fence_api.h
*/
struct ttm_bo_driver {
/**
* struct ttm_bo_driver member create_ttm_backend_entry
*
* @bdev: The buffer object device.
*
* Create a driver specific struct ttm_backend.
*/
struct ttm_backend *(*create_ttm_backend_entry)
(struct ttm_bo_device *bdev);
/**
* struct ttm_bo_driver member invalidate_caches
*
* @bdev: the buffer object device.
* @flags: new placement of the rebound buffer object.
*
* A previosly evicted buffer has been rebound in a
* potentially new location. Tell the driver that it might
* consider invalidating read (texture) caches on the next command
* submission as a consequence.
*/
int (*invalidate_caches) (struct ttm_bo_device *bdev, uint32_t flags);
int (*init_mem_type) (struct ttm_bo_device *bdev, uint32_t type,
struct ttm_mem_type_manager *man);
/**
* struct ttm_bo_driver member evict_flags:
*
* @bo: the buffer object to be evicted
*
* Return the bo flags for a buffer which is not mapped to the hardware.
* These will be placed in proposed_flags so that when the move is
* finished, they'll end up in bo->mem.flags
*/
void(*evict_flags) (struct ttm_buffer_object *bo,
struct ttm_placement *placement);
/**
* struct ttm_bo_driver member move:
*
* @bo: the buffer to move
* @evict: whether this motion is evicting the buffer from
* the graphics address space
* @interruptible: Use interruptible sleeps if possible when sleeping.
* @no_wait: whether this should give up and return -EBUSY
* if this move would require sleeping
* @new_mem: the new memory region receiving the buffer
*
* Move a buffer between two memory regions.
*/
int (*move) (struct ttm_buffer_object *bo,
bool evict, bool interruptible,
bool no_wait, struct ttm_mem_reg *new_mem);
/**
* struct ttm_bo_driver_member verify_access
*
* @bo: Pointer to a buffer object.
* @filp: Pointer to a struct file trying to access the object.
*
* Called from the map / write / read methods to verify that the
* caller is permitted to access the buffer object.
* This member may be set to NULL, which will refuse this kind of
* access for all buffer objects.
* This function should return 0 if access is granted, -EPERM otherwise.
*/
int (*verify_access) (struct ttm_buffer_object *bo,
struct file *filp);
/**
* In case a driver writer dislikes the TTM fence objects,
* the driver writer can replace those with sync objects of
* his / her own. If it turns out that no driver writer is
* using these. I suggest we remove these hooks and plug in
* fences directly. The bo driver needs the following functionality:
* See the corresponding functions in the fence object API
* documentation.
*/
bool (*sync_obj_signaled) (void *sync_obj, void *sync_arg);
int (*sync_obj_wait) (void *sync_obj, void *sync_arg,
bool lazy, bool interruptible);
int (*sync_obj_flush) (void *sync_obj, void *sync_arg);
void (*sync_obj_unref) (void **sync_obj);
void *(*sync_obj_ref) (void *sync_obj);
/* hook to notify driver about a driver move so it
* can do tiling things */
void (*move_notify)(struct ttm_buffer_object *bo,
struct ttm_mem_reg *new_mem);
/* notify the driver we are taking a fault on this BO
* and have reserved it */
void (*fault_reserve_notify)(struct ttm_buffer_object *bo);
};
/**
* struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global.
*/
struct ttm_bo_global_ref {
struct ttm_global_reference ref;
struct ttm_mem_global *mem_glob;
};
/**
* struct ttm_bo_global - Buffer object driver global data.
*
* @mem_glob: Pointer to a struct ttm_mem_global object for accounting.
* @dummy_read_page: Pointer to a dummy page used for mapping requests
* of unpopulated pages.
* @shrink: A shrink callback object used for buffer object swap.
* @ttm_bo_extra_size: Extra size (sizeof(struct ttm_buffer_object) excluded)
* used by a buffer object. This is excluding page arrays and backing pages.
* @ttm_bo_size: This is @ttm_bo_extra_size + sizeof(struct ttm_buffer_object).
* @device_list_mutex: Mutex protecting the device list.
* This mutex is held while traversing the device list for pm options.
* @lru_lock: Spinlock protecting the bo subsystem lru lists.
* @device_list: List of buffer object devices.
* @swap_lru: Lru list of buffer objects used for swapping.
*/
struct ttm_bo_global {
/**
* Constant after init.
*/
// struct kobject kobj;
struct ttm_mem_global *mem_glob;
struct page *dummy_read_page;
struct ttm_mem_shrink shrink;
size_t ttm_bo_extra_size;
size_t ttm_bo_size;
struct mutex device_list_mutex;
spinlock_t lru_lock;
/**
* Protected by device_list_mutex.
*/
struct list_head device_list;
/**
* Protected by the lru_lock.
*/
struct list_head swap_lru;
/**
* Internal protection.
*/
atomic_t bo_count;
};
#define TTM_NUM_MEM_TYPES 8
#define TTM_BO_PRIV_FLAG_MOVING 0 /* Buffer object is moving and needs
idling before CPU mapping */
#define TTM_BO_PRIV_FLAG_MAX 1
/**
* struct ttm_bo_device - Buffer object driver device-specific data.
*
* @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
* @man: An array of mem_type_managers.
* @addr_space_mm: Range manager for the device address space.
* lru_lock: Spinlock that protects the buffer+device lru lists and
* ddestroy lists.
* @nice_mode: Try nicely to wait for buffer idle when cleaning a manager.
* If a GPU lockup has been detected, this is forced to 0.
* @dev_mapping: A pointer to the struct address_space representing the
* device address space.
* @wq: Work queue structure for the delayed delete workqueue.
*
*/
struct ttm_bo_device {
/*
* Constant after bo device init / atomic.
*/
struct list_head device_list;
struct ttm_bo_global *glob;
struct ttm_bo_driver *driver;
rwlock_t vm_lock;
struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
/*
* Protected by the vm lock.
*/
// struct rb_root addr_space_rb;
struct drm_mm addr_space_mm;
/*
* Protected by the global:lru lock.
*/
struct list_head ddestroy;
/*
* Protected by load / firstopen / lastclose /unload sync.
*/
bool nice_mode;
struct address_space *dev_mapping;
/*
* Internal protection.
*/
// struct delayed_work wq;
bool need_dma32;
};
/**
* ttm_flag_masked
*
* @old: Pointer to the result and original value.
* @new: New value of bits.
* @mask: Mask of bits to change.
*
* Convenience function to change a number of bits identified by a mask.
*/
static inline uint32_t
ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
{
*old ^= (*old ^ new) & mask;
return *old;
}
/**
* ttm_tt_create
*
* @bdev: pointer to a struct ttm_bo_device:
* @size: Size of the data needed backing.
* @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
* @dummy_read_page: See struct ttm_bo_device.
*
* Create a struct ttm_tt to back data with system memory pages.
* No pages are actually allocated.
* Returns:
* NULL: Out of memory.
*/
extern struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev,
unsigned long size,
uint32_t page_flags,
struct page *dummy_read_page);
/**
* ttm_tt_set_user:
*
* @ttm: The struct ttm_tt to populate.
* @tsk: A struct task_struct for which @start is a valid user-space address.
* @start: A valid user-space address.
* @num_pages: Size in pages of the user memory area.
*
* Populate a struct ttm_tt with a user-space memory area after first pinning
* the pages backing it.
* Returns:
* !0: Error.
*/
extern int ttm_tt_set_user(struct ttm_tt *ttm,
struct task_struct *tsk,
unsigned long start, unsigned long num_pages);
/**
* ttm_ttm_bind:
*
* @ttm: The struct ttm_tt containing backing pages.
* @bo_mem: The struct ttm_mem_reg identifying the binding location.
*
* Bind the pages of @ttm to an aperture location identified by @bo_mem
*/
extern int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
/**
* ttm_tt_populate:
*
* @ttm: The struct ttm_tt to contain the backing pages.
*
* Add backing pages to all of @ttm
*/
extern int ttm_tt_populate(struct ttm_tt *ttm);
/**
* ttm_ttm_destroy:
*
* @ttm: The struct ttm_tt.
*
* Unbind, unpopulate and destroy a struct ttm_tt.
*/
extern void ttm_tt_destroy(struct ttm_tt *ttm);
/**
* ttm_ttm_unbind:
*
* @ttm: The struct ttm_tt.
*
* Unbind a struct ttm_tt.
*/
extern void ttm_tt_unbind(struct ttm_tt *ttm);
/**
* ttm_ttm_destroy:
*
* @ttm: The struct ttm_tt.
* @index: Index of the desired page.
*
* Return a pointer to the struct page backing @ttm at page
* index @index. If the page is unpopulated, one will be allocated to
* populate that index.
*
* Returns:
* NULL on OOM.
*/
extern struct page *ttm_tt_get_page(struct ttm_tt *ttm, int index);
/**
* ttm_tt_cache_flush:
*
* @pages: An array of pointers to struct page:s to flush.
* @num_pages: Number of pages to flush.
*
* Flush the data of the indicated pages from the cpu caches.
* This is used when changing caching attributes of the pages from
* cache-coherent.
*/
extern void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages);
/**
* ttm_tt_set_placement_caching:
*
* @ttm A struct ttm_tt the backing pages of which will change caching policy.
* @placement: Flag indicating the desired caching policy.
*
* This function will change caching policy of any default kernel mappings of
* the pages backing @ttm. If changing from cached to uncached or
* write-combined,
* all CPU caches will first be flushed to make sure the data of the pages
* hit RAM. This function may be very costly as it involves global TLB
* and cache flushes and potential page splitting / combining.
*/
extern int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement);
extern int ttm_tt_swapout(struct ttm_tt *ttm,
struct file *persistant_swap_storage);
/*
* ttm_bo.c
*/
/**
* ttm_mem_reg_is_pci
*
* @bdev: Pointer to a struct ttm_bo_device.
* @mem: A valid struct ttm_mem_reg.
*
* Returns true if the memory described by @mem is PCI memory,
* false otherwise.
*/
extern bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem);
/**
* ttm_bo_mem_space
*
* @bo: Pointer to a struct ttm_buffer_object. the data of which
* we want to allocate space for.
* @proposed_placement: Proposed new placement for the buffer object.
* @mem: A struct ttm_mem_reg.
* @interruptible: Sleep interruptible when sliping.
* @no_wait: Don't sleep waiting for space to become available.
*
* Allocate memory space for the buffer object pointed to by @bo, using
* the placement flags in @mem, potentially evicting other idle buffer objects.
* This function may sleep while waiting for space to become available.
* Returns:
* -EBUSY: No space available (only if no_wait == 1).
* -ENOMEM: Could not allocate memory for the buffer object, either due to
* fragmentation or concurrent allocators.
* -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
*/
extern int ttm_bo_mem_space(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
struct ttm_mem_reg *mem,
bool interruptible, bool no_wait);
/**
* ttm_bo_wait_for_cpu
*
* @bo: Pointer to a struct ttm_buffer_object.
* @no_wait: Don't sleep while waiting.
*
* Wait until a buffer object is no longer sync'ed for CPU access.
* Returns:
* -EBUSY: Buffer object was sync'ed for CPU access. (only if no_wait == 1).
* -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
*/
extern int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait);
/**
* ttm_bo_pci_offset - Get the PCI offset for the buffer object memory.
*
* @bo Pointer to a struct ttm_buffer_object.
* @bus_base On return the base of the PCI region
* @bus_offset On return the byte offset into the PCI region
* @bus_size On return the byte size of the buffer object or zero if
* the buffer object memory is not accessible through a PCI region.
*
* Returns:
* -EINVAL if the buffer object is currently not mappable.
* 0 otherwise.
*/
extern int ttm_bo_pci_offset(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem,
unsigned long *bus_base,
unsigned long *bus_offset,
unsigned long *bus_size);
extern void ttm_bo_global_release(struct ttm_global_reference *ref);
extern int ttm_bo_global_init(struct ttm_global_reference *ref);
extern int ttm_bo_device_release(struct ttm_bo_device *bdev);
/**
* ttm_bo_device_init
*
* @bdev: A pointer to a struct ttm_bo_device to initialize.
* @mem_global: A pointer to an initialized struct ttm_mem_global.
* @driver: A pointer to a struct ttm_bo_driver set up by the caller.
* @file_page_offset: Offset into the device address space that is available
* for buffer data. This ensures compatibility with other users of the
* address space.
*
* Initializes a struct ttm_bo_device:
* Returns:
* !0: Failure.
*/
extern int ttm_bo_device_init(struct ttm_bo_device *bdev,
struct ttm_bo_global *glob,
struct ttm_bo_driver *driver,
uint64_t file_page_offset, bool need_dma32);
/**
* ttm_bo_unmap_virtual
*
* @bo: tear down the virtual mappings for this BO
*/
extern void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
/**
* ttm_bo_reserve:
*
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Sleep interruptible if waiting.
* @no_wait: Don't sleep while trying to reserve, rather return -EBUSY.
* @use_sequence: If @bo is already reserved, Only sleep waiting for
* it to become unreserved if @sequence < (@bo)->sequence.
*
* Locks a buffer object for validation. (Or prevents other processes from
* locking it for validation) and removes it from lru lists, while taking
* a number of measures to prevent deadlocks.
*
* Deadlocks may occur when two processes try to reserve multiple buffers in
* different order, either by will or as a result of a buffer being evicted
* to make room for a buffer already reserved. (Buffers are reserved before
* they are evicted). The following algorithm prevents such deadlocks from
* occuring:
* 1) Buffers are reserved with the lru spinlock held. Upon successful
* reservation they are removed from the lru list. This stops a reserved buffer
* from being evicted. However the lru spinlock is released between the time
* a buffer is selected for eviction and the time it is reserved.
* Therefore a check is made when a buffer is reserved for eviction, that it
* is still the first buffer in the lru list, before it is removed from the
* list. @check_lru == 1 forces this check. If it fails, the function returns
* -EINVAL, and the caller should then choose a new buffer to evict and repeat
* the procedure.
* 2) Processes attempting to reserve multiple buffers other than for eviction,
* (typically execbuf), should first obtain a unique 32-bit
* validation sequence number,
* and call this function with @use_sequence == 1 and @sequence == the unique
* sequence number. If upon call of this function, the buffer object is already
* reserved, the validation sequence is checked against the validation
* sequence of the process currently reserving the buffer,
* and if the current validation sequence is greater than that of the process
* holding the reservation, the function returns -EAGAIN. Otherwise it sleeps
* waiting for the buffer to become unreserved, after which it retries
* reserving.
* The caller should, when receiving an -EAGAIN error
* release all its buffer reservations, wait for @bo to become unreserved, and
* then rerun the validation with the same validation sequence. This procedure
* will always guarantee that the process with the lowest validation sequence
* will eventually succeed, preventing both deadlocks and starvation.
*
* Returns:
* -EAGAIN: The reservation may cause a deadlock.
* Release all buffer reservations, wait for @bo to become unreserved and
* try again. (only if use_sequence == 1).
* -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
* a signal. Release all buffer reservations and return to user-space.
*/
extern int ttm_bo_reserve(struct ttm_buffer_object *bo,
bool interruptible,
bool no_wait, bool use_sequence, uint32_t sequence);
/**
* ttm_bo_unreserve
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Unreserve a previous reservation of @bo.
*/
extern void ttm_bo_unreserve(struct ttm_buffer_object *bo);
/**
* ttm_bo_wait_unreserved
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Wait for a struct ttm_buffer_object to become unreserved.
* This is typically used in the execbuf code to relax cpu-usage when
* a potential deadlock condition backoff.
*/
extern int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo,
bool interruptible);
/**
* ttm_bo_block_reservation
*
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Use interruptible sleep when waiting.
* @no_wait: Don't sleep, but rather return -EBUSY.
*
* Block reservation for validation by simply reserving the buffer.
* This is intended for single buffer use only without eviction,
* and thus needs no deadlock protection.
*
* Returns:
* -EBUSY: If no_wait == 1 and the buffer is already reserved.
* -ERESTARTSYS: If interruptible == 1 and the process received a signal
* while sleeping.
*/
extern int ttm_bo_block_reservation(struct ttm_buffer_object *bo,
bool interruptible, bool no_wait);
/**
* ttm_bo_unblock_reservation
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Unblocks reservation leaving lru lists untouched.
*/
extern void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo);
/*
* ttm_bo_util.c
*/
/**
* ttm_bo_move_ttm
*
* @bo: A pointer to a struct ttm_buffer_object.
* @evict: 1: This is an eviction. Don't try to pipeline.
* @no_wait: Never sleep, but rather return with -EBUSY.
* @new_mem: struct ttm_mem_reg indicating where to move.
*
* Optimized move function for a buffer object with both old and
* new placement backed by a TTM. The function will, if successful,
* free any old aperture space, and set (@new_mem)->mm_node to NULL,
* and update the (@bo)->mem placement flags. If unsuccessful, the old
* data remains untouched, and it's up to the caller to free the
* memory space indicated by @new_mem.
* Returns:
* !0: Failure.
*/
extern int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
bool evict, bool no_wait,
struct ttm_mem_reg *new_mem);
/**
* ttm_bo_move_memcpy
*
* @bo: A pointer to a struct ttm_buffer_object.
* @evict: 1: This is an eviction. Don't try to pipeline.
* @no_wait: Never sleep, but rather return with -EBUSY.
* @new_mem: struct ttm_mem_reg indicating where to move.
*
* Fallback move function for a mappable buffer object in mappable memory.
* The function will, if successful,
* free any old aperture space, and set (@new_mem)->mm_node to NULL,
* and update the (@bo)->mem placement flags. If unsuccessful, the old
* data remains untouched, and it's up to the caller to free the
* memory space indicated by @new_mem.
* Returns:
* !0: Failure.
*/
extern int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
bool evict,
bool no_wait, struct ttm_mem_reg *new_mem);
/**
* ttm_bo_free_old_node
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Utility function to free an old placement after a successful move.
*/
extern void ttm_bo_free_old_node(struct ttm_buffer_object *bo);
/**
* ttm_bo_move_accel_cleanup.
*
* @bo: A pointer to a struct ttm_buffer_object.
* @sync_obj: A sync object that signals when moving is complete.
* @sync_obj_arg: An argument to pass to the sync object idle / wait
* functions.
* @evict: This is an evict move. Don't return until the buffer is idle.
* @no_wait: Never sleep, but rather return with -EBUSY.
* @new_mem: struct ttm_mem_reg indicating where to move.
*
* Accelerated move function to be called when an accelerated move
* has been scheduled. The function will create a new temporary buffer object
* representing the old placement, and put the sync object on both buffer
* objects. After that the newly created buffer object is unref'd to be
* destroyed when the move is complete. This will help pipeline
* buffer moves.
*/
extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
void *sync_obj,
void *sync_obj_arg,
bool evict, bool no_wait,
struct ttm_mem_reg *new_mem);
/**
* ttm_io_prot
*
* @c_state: Caching state.
* @tmp: Page protection flag for a normal, cached mapping.
*
* Utility function that returns the pgprot_t that should be used for
* setting up a PTE with the caching model indicated by @c_state.
*/
extern pgprot_t ttm_io_prot(enum ttm_caching_state c_state, pgprot_t tmp);
#if (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
#define TTM_HAS_AGP
#include <linux/agp_backend.h>
/**
* ttm_agp_backend_init
*
* @bdev: Pointer to a struct ttm_bo_device.
* @bridge: The agp bridge this device is sitting on.
*
* Create a TTM backend that uses the indicated AGP bridge as an aperture
* for TT memory. This function uses the linux agpgart interface to
* bind and unbind memory backing a ttm_tt.
*/
extern struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
struct agp_bridge_data *bridge);
#endif
#endif
/**************************************************************************
*
* 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.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#ifndef _TTM_BO_DRIVER_H_
#define _TTM_BO_DRIVER_H_
#include <ttm/ttm_bo_api.h>
#include <ttm/ttm_memory.h>
#include <ttm/ttm_module.h>
#include <drm/drm_mm.h>
#include <drm/drm_global.h>
//#include <linux/workqueue.h>
//#include <linux/fs.h>
#include <linux/spinlock.h>
struct ttm_backend_func {
/**
* struct ttm_backend_func member bind
*
* @ttm: Pointer to a struct ttm_tt.
* @bo_mem: Pointer to a struct ttm_mem_reg describing the
* memory type and location for binding.
*
* Bind the backend pages into the aperture in the location
* indicated by @bo_mem. This function should be able to handle
* differences between aperture and system page sizes.
*/
int (*bind) (struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
/**
* struct ttm_backend_func member unbind
*
* @ttm: Pointer to a struct ttm_tt.
*
* Unbind previously bound backend pages. This function should be
* able to handle differences between aperture and system page sizes.
*/
int (*unbind) (struct ttm_tt *ttm);
/**
* struct ttm_backend_func member destroy
*
* @ttm: Pointer to a struct ttm_tt.
*
* Destroy the backend. This will be call back from ttm_tt_destroy so
* don't call ttm_tt_destroy from the callback or infinite loop.
*/
void (*destroy) (struct ttm_tt *ttm);
};
#define TTM_PAGE_FLAG_WRITE (1 << 3)
#define TTM_PAGE_FLAG_SWAPPED (1 << 4)
#define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5)
#define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6)
#define TTM_PAGE_FLAG_DMA32 (1 << 7)
#define TTM_PAGE_FLAG_SG (1 << 8)
enum ttm_caching_state {
tt_uncached,
tt_wc,
tt_cached
};
/**
* struct ttm_tt
*
* @bdev: Pointer to a struct ttm_bo_device.
* @func: Pointer to a struct ttm_backend_func that describes
* the backend methods.
* @dummy_read_page: Page to map where the ttm_tt page array contains a NULL
* pointer.
* @pages: Array of pages backing the data.
* @num_pages: Number of pages in the page array.
* @bdev: Pointer to the current struct ttm_bo_device.
* @be: Pointer to the ttm backend.
* @swap_storage: Pointer to shmem struct file for swap storage.
* @caching_state: The current caching state of the pages.
* @state: The current binding state of the pages.
*
* This is a structure holding the pages, caching- and aperture binding
* status for a buffer object that isn't backed by fixed (VRAM / AGP)
* memory.
*/
struct ttm_tt {
struct ttm_bo_device *bdev;
struct ttm_backend_func *func;
struct page *dummy_read_page;
struct page **pages;
uint32_t page_flags;
unsigned long num_pages;
struct sg_table *sg; /* for SG objects via dma-buf */
struct ttm_bo_global *glob;
struct file *swap_storage;
enum ttm_caching_state caching_state;
enum {
tt_bound,
tt_unbound,
tt_unpopulated,
} state;
};
/**
* struct ttm_dma_tt
*
* @ttm: Base ttm_tt struct.
* @dma_address: The DMA (bus) addresses of the pages
* @pages_list: used by some page allocation backend
*
* This is a structure holding the pages, caching- and aperture binding
* status for a buffer object that isn't backed by fixed (VRAM / AGP)
* memory.
*/
struct ttm_dma_tt {
struct ttm_tt ttm;
dma_addr_t *dma_address;
struct list_head pages_list;
};
#define TTM_MEMTYPE_FLAG_FIXED (1 << 0) /* Fixed (on-card) PCI memory */
#define TTM_MEMTYPE_FLAG_MAPPABLE (1 << 1) /* Memory mappable */
#define TTM_MEMTYPE_FLAG_CMA (1 << 3) /* Can't map aperture */
struct ttm_mem_type_manager;
struct ttm_mem_type_manager_func {
/**
* struct ttm_mem_type_manager member init
*
* @man: Pointer to a memory type manager.
* @p_size: Implementation dependent, but typically the size of the
* range to be managed in pages.
*
* Called to initialize a private range manager. The function is
* expected to initialize the man::priv member.
* Returns 0 on success, negative error code on failure.
*/
int (*init)(struct ttm_mem_type_manager *man, unsigned long p_size);
/**
* struct ttm_mem_type_manager member takedown
*
* @man: Pointer to a memory type manager.
*
* Called to undo the setup done in init. All allocated resources
* should be freed.
*/
int (*takedown)(struct ttm_mem_type_manager *man);
/**
* struct ttm_mem_type_manager member get_node
*
* @man: Pointer to a memory type manager.
* @bo: Pointer to the buffer object we're allocating space for.
* @placement: Placement details.
* @mem: Pointer to a struct ttm_mem_reg to be filled in.
*
* This function should allocate space in the memory type managed
* by @man. Placement details if
* applicable are given by @placement. If successful,
* @mem::mm_node should be set to a non-null value, and
* @mem::start should be set to a value identifying the beginning
* of the range allocated, and the function should return zero.
* If the memory region accommodate the buffer object, @mem::mm_node
* should be set to NULL, and the function should return 0.
* If a system error occurred, preventing the request to be fulfilled,
* the function should return a negative error code.
*
* Note that @mem::mm_node will only be dereferenced by
* struct ttm_mem_type_manager functions and optionally by the driver,
* which has knowledge of the underlying type.
*
* This function may not be called from within atomic context, so
* an implementation can and must use either a mutex or a spinlock to
* protect any data structures managing the space.
*/
int (*get_node)(struct ttm_mem_type_manager *man,
struct ttm_buffer_object *bo,
struct ttm_placement *placement,
struct ttm_mem_reg *mem);
/**
* struct ttm_mem_type_manager member put_node
*
* @man: Pointer to a memory type manager.
* @mem: Pointer to a struct ttm_mem_reg to be filled in.
*
* This function frees memory type resources previously allocated
* and that are identified by @mem::mm_node and @mem::start. May not
* be called from within atomic context.
*/
void (*put_node)(struct ttm_mem_type_manager *man,
struct ttm_mem_reg *mem);
/**
* struct ttm_mem_type_manager member debug
*
* @man: Pointer to a memory type manager.
* @prefix: Prefix to be used in printout to identify the caller.
*
* This function is called to print out the state of the memory
* type manager to aid debugging of out-of-memory conditions.
* It may not be called from within atomic context.
*/
void (*debug)(struct ttm_mem_type_manager *man, const char *prefix);
};
/**
* struct ttm_mem_type_manager
*
* @has_type: The memory type has been initialized.
* @use_type: The memory type is enabled.
* @flags: TTM_MEMTYPE_XX flags identifying the traits of the memory
* managed by this memory type.
* @gpu_offset: If used, the GPU offset of the first managed page of
* fixed memory or the first managed location in an aperture.
* @size: Size of the managed region.
* @available_caching: A mask of available caching types, TTM_PL_FLAG_XX,
* as defined in ttm_placement_common.h
* @default_caching: The default caching policy used for a buffer object
* placed in this memory type if the user doesn't provide one.
* @func: structure pointer implementing the range manager. See above
* @priv: Driver private closure for @func.
* @io_reserve_mutex: Mutex optionally protecting shared io_reserve structures
* @use_io_reserve_lru: Use an lru list to try to unreserve io_mem_regions
* reserved by the TTM vm system.
* @io_reserve_lru: Optional lru list for unreserving io mem regions.
* @io_reserve_fastpath: Only use bdev::driver::io_mem_reserve to obtain
* static information. bdev::driver::io_mem_free is never used.
* @lru: The lru list for this memory type.
*
* This structure is used to identify and manage memory types for a device.
* It's set up by the ttm_bo_driver::init_mem_type method.
*/
struct ttm_mem_type_manager {
struct ttm_bo_device *bdev;
/*
* No protection. Constant from start.
*/
bool has_type;
bool use_type;
uint32_t flags;
unsigned long gpu_offset;
uint64_t size;
uint32_t available_caching;
uint32_t default_caching;
const struct ttm_mem_type_manager_func *func;
void *priv;
struct mutex io_reserve_mutex;
bool use_io_reserve_lru;
bool io_reserve_fastpath;
/*
* Protected by @io_reserve_mutex:
*/
struct list_head io_reserve_lru;
/*
* Protected by the global->lru_lock.
*/
struct list_head lru;
};
/**
* struct ttm_bo_driver
*
* @create_ttm_backend_entry: Callback to create a struct ttm_backend.
* @invalidate_caches: Callback to invalidate read caches when a buffer object
* has been evicted.
* @init_mem_type: Callback to initialize a struct ttm_mem_type_manager
* structure.
* @evict_flags: Callback to obtain placement flags when a buffer is evicted.
* @move: Callback for a driver to hook in accelerated functions to
* move a buffer.
* If set to NULL, a potentially slow memcpy() move is used.
* @sync_obj_signaled: See ttm_fence_api.h
* @sync_obj_wait: See ttm_fence_api.h
* @sync_obj_flush: See ttm_fence_api.h
* @sync_obj_unref: See ttm_fence_api.h
* @sync_obj_ref: See ttm_fence_api.h
*/
struct ttm_bo_driver {
/**
* ttm_tt_create
*
* @bdev: pointer to a struct ttm_bo_device:
* @size: Size of the data needed backing.
* @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
* @dummy_read_page: See struct ttm_bo_device.
*
* Create a struct ttm_tt to back data with system memory pages.
* No pages are actually allocated.
* Returns:
* NULL: Out of memory.
*/
struct ttm_tt *(*ttm_tt_create)(struct ttm_bo_device *bdev,
unsigned long size,
uint32_t page_flags,
struct page *dummy_read_page);
/**
* ttm_tt_populate
*
* @ttm: The struct ttm_tt to contain the backing pages.
*
* Allocate all backing pages
* Returns:
* -ENOMEM: Out of memory.
*/
int (*ttm_tt_populate)(struct ttm_tt *ttm);
/**
* ttm_tt_unpopulate
*
* @ttm: The struct ttm_tt to contain the backing pages.
*
* Free all backing page
*/
void (*ttm_tt_unpopulate)(struct ttm_tt *ttm);
/**
* struct ttm_bo_driver member invalidate_caches
*
* @bdev: the buffer object device.
* @flags: new placement of the rebound buffer object.
*
* A previosly evicted buffer has been rebound in a
* potentially new location. Tell the driver that it might
* consider invalidating read (texture) caches on the next command
* submission as a consequence.
*/
int (*invalidate_caches) (struct ttm_bo_device *bdev, uint32_t flags);
int (*init_mem_type) (struct ttm_bo_device *bdev, uint32_t type,
struct ttm_mem_type_manager *man);
/**
* struct ttm_bo_driver member evict_flags:
*
* @bo: the buffer object to be evicted
*
* Return the bo flags for a buffer which is not mapped to the hardware.
* These will be placed in proposed_flags so that when the move is
* finished, they'll end up in bo->mem.flags
*/
void(*evict_flags) (struct ttm_buffer_object *bo,
struct ttm_placement *placement);
/**
* struct ttm_bo_driver member move:
*
* @bo: the buffer to move
* @evict: whether this motion is evicting the buffer from
* the graphics address space
* @interruptible: Use interruptible sleeps if possible when sleeping.
* @no_wait: whether this should give up and return -EBUSY
* if this move would require sleeping
* @new_mem: the new memory region receiving the buffer
*
* Move a buffer between two memory regions.
*/
int (*move) (struct ttm_buffer_object *bo,
bool evict, bool interruptible,
bool no_wait_gpu,
struct ttm_mem_reg *new_mem);
/**
* struct ttm_bo_driver_member verify_access
*
* @bo: Pointer to a buffer object.
* @filp: Pointer to a struct file trying to access the object.
*
* Called from the map / write / read methods to verify that the
* caller is permitted to access the buffer object.
* This member may be set to NULL, which will refuse this kind of
* access for all buffer objects.
* This function should return 0 if access is granted, -EPERM otherwise.
*/
int (*verify_access) (struct ttm_buffer_object *bo,
struct file *filp);
/**
* In case a driver writer dislikes the TTM fence objects,
* the driver writer can replace those with sync objects of
* his / her own. If it turns out that no driver writer is
* using these. I suggest we remove these hooks and plug in
* fences directly. The bo driver needs the following functionality:
* See the corresponding functions in the fence object API
* documentation.
*/
bool (*sync_obj_signaled) (void *sync_obj);
int (*sync_obj_wait) (void *sync_obj,
bool lazy, bool interruptible);
int (*sync_obj_flush) (void *sync_obj);
void (*sync_obj_unref) (void **sync_obj);
void *(*sync_obj_ref) (void *sync_obj);
/* hook to notify driver about a driver move so it
* can do tiling things */
void (*move_notify)(struct ttm_buffer_object *bo,
struct ttm_mem_reg *new_mem);
/* notify the driver we are taking a fault on this BO
* and have reserved it */
int (*fault_reserve_notify)(struct ttm_buffer_object *bo);
/**
* notify the driver that we're about to swap out this bo
*/
void (*swap_notify) (struct ttm_buffer_object *bo);
/**
* Driver callback on when mapping io memory (for bo_move_memcpy
* for instance). TTM will take care to call io_mem_free whenever
* the mapping is not use anymore. io_mem_reserve & io_mem_free
* are balanced.
*/
int (*io_mem_reserve)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
void (*io_mem_free)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
};
/**
* struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global.
*/
struct ttm_bo_global_ref {
struct drm_global_reference ref;
struct ttm_mem_global *mem_glob;
};
/**
* struct ttm_bo_global - Buffer object driver global data.
*
* @mem_glob: Pointer to a struct ttm_mem_global object for accounting.
* @dummy_read_page: Pointer to a dummy page used for mapping requests
* of unpopulated pages.
* @shrink: A shrink callback object used for buffer object swap.
* @device_list_mutex: Mutex protecting the device list.
* This mutex is held while traversing the device list for pm options.
* @lru_lock: Spinlock protecting the bo subsystem lru lists.
* @device_list: List of buffer object devices.
* @swap_lru: Lru list of buffer objects used for swapping.
*/
struct ttm_bo_global {
/**
* Constant after init.
*/
// struct kobject kobj;
struct ttm_mem_global *mem_glob;
struct page *dummy_read_page;
struct ttm_mem_shrink shrink;
struct mutex device_list_mutex;
spinlock_t lru_lock;
/**
* Protected by device_list_mutex.
*/
struct list_head device_list;
/**
* Protected by the lru_lock.
*/
struct list_head swap_lru;
/**
* Internal protection.
*/
atomic_t bo_count;
};
#define TTM_NUM_MEM_TYPES 8
#define TTM_BO_PRIV_FLAG_MOVING 0 /* Buffer object is moving and needs
idling before CPU mapping */
#define TTM_BO_PRIV_FLAG_MAX 1
/**
* struct ttm_bo_device - Buffer object driver device-specific data.
*
* @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
* @man: An array of mem_type_managers.
* @fence_lock: Protects the synchronizing members on *all* bos belonging
* to this device.
* @addr_space_mm: Range manager for the device address space.
* lru_lock: Spinlock that protects the buffer+device lru lists and
* ddestroy lists.
* @val_seq: Current validation sequence.
* @dev_mapping: A pointer to the struct address_space representing the
* device address space.
* @wq: Work queue structure for the delayed delete workqueue.
*
*/
struct ttm_bo_device {
/*
* Constant after bo device init / atomic.
*/
struct list_head device_list;
struct ttm_bo_global *glob;
struct ttm_bo_driver *driver;
rwlock_t vm_lock;
struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
spinlock_t fence_lock;
/*
* Protected by the vm lock.
*/
struct rb_root addr_space_rb;
struct drm_mm addr_space_mm;
/*
* Protected by the global:lru lock.
*/
struct list_head ddestroy;
uint32_t val_seq;
/*
* Protected by load / firstopen / lastclose /unload sync.
*/
struct address_space *dev_mapping;
/*
* Internal protection.
*/
struct delayed_work wq;
bool need_dma32;
};
/**
* ttm_flag_masked
*
* @old: Pointer to the result and original value.
* @new: New value of bits.
* @mask: Mask of bits to change.
*
* Convenience function to change a number of bits identified by a mask.
*/
static inline uint32_t
ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
{
*old ^= (*old ^ new) & mask;
return *old;
}
/**
* ttm_tt_init
*
* @ttm: The struct ttm_tt.
* @bdev: pointer to a struct ttm_bo_device:
* @size: Size of the data needed backing.
* @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
* @dummy_read_page: See struct ttm_bo_device.
*
* Create a struct ttm_tt to back data with system memory pages.
* No pages are actually allocated.
* Returns:
* NULL: Out of memory.
*/
extern int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
unsigned long size, uint32_t page_flags,
struct page *dummy_read_page);
extern int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev,
unsigned long size, uint32_t page_flags,
struct page *dummy_read_page);
/**
* ttm_tt_fini
*
* @ttm: the ttm_tt structure.
*
* Free memory of ttm_tt structure
*/
extern void ttm_tt_fini(struct ttm_tt *ttm);
extern void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma);
/**
* ttm_ttm_bind:
*
* @ttm: The struct ttm_tt containing backing pages.
* @bo_mem: The struct ttm_mem_reg identifying the binding location.
*
* Bind the pages of @ttm to an aperture location identified by @bo_mem
*/
extern int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
/**
* ttm_ttm_destroy:
*
* @ttm: The struct ttm_tt.
*
* Unbind, unpopulate and destroy common struct ttm_tt.
*/
extern void ttm_tt_destroy(struct ttm_tt *ttm);
/**
* ttm_ttm_unbind:
*
* @ttm: The struct ttm_tt.
*
* Unbind a struct ttm_tt.
*/
extern void ttm_tt_unbind(struct ttm_tt *ttm);
/**
* ttm_tt_swapin:
*
* @ttm: The struct ttm_tt.
*
* Swap in a previously swap out ttm_tt.
*/
extern int ttm_tt_swapin(struct ttm_tt *ttm);
/**
* ttm_tt_cache_flush:
*
* @pages: An array of pointers to struct page:s to flush.
* @num_pages: Number of pages to flush.
*
* Flush the data of the indicated pages from the cpu caches.
* This is used when changing caching attributes of the pages from
* cache-coherent.
*/
extern void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages);
/**
* ttm_tt_set_placement_caching:
*
* @ttm A struct ttm_tt the backing pages of which will change caching policy.
* @placement: Flag indicating the desired caching policy.
*
* This function will change caching policy of any default kernel mappings of
* the pages backing @ttm. If changing from cached to uncached or
* write-combined,
* all CPU caches will first be flushed to make sure the data of the pages
* hit RAM. This function may be very costly as it involves global TLB
* and cache flushes and potential page splitting / combining.
*/
extern int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement);
extern int ttm_tt_swapout(struct ttm_tt *ttm,
struct file *persistent_swap_storage);
/*
* ttm_bo.c
*/
/**
* ttm_mem_reg_is_pci
*
* @bdev: Pointer to a struct ttm_bo_device.
* @mem: A valid struct ttm_mem_reg.
*
* Returns true if the memory described by @mem is PCI memory,
* false otherwise.
*/
extern bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem);
/**
* ttm_bo_mem_space
*
* @bo: Pointer to a struct ttm_buffer_object. the data of which
* we want to allocate space for.
* @proposed_placement: Proposed new placement for the buffer object.
* @mem: A struct ttm_mem_reg.
* @interruptible: Sleep interruptible when sliping.
* @no_wait_gpu: Return immediately if the GPU is busy.
*
* Allocate memory space for the buffer object pointed to by @bo, using
* the placement flags in @mem, potentially evicting other idle buffer objects.
* This function may sleep while waiting for space to become available.
* Returns:
* -EBUSY: No space available (only if no_wait == 1).
* -ENOMEM: Could not allocate memory for the buffer object, either due to
* fragmentation or concurrent allocators.
* -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
*/
extern int ttm_bo_mem_space(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
struct ttm_mem_reg *mem,
bool interruptible,
bool no_wait_gpu);
extern void ttm_bo_mem_put(struct ttm_buffer_object *bo,
struct ttm_mem_reg *mem);
extern void ttm_bo_mem_put_locked(struct ttm_buffer_object *bo,
struct ttm_mem_reg *mem);
extern void ttm_bo_global_release(struct drm_global_reference *ref);
extern int ttm_bo_global_init(struct drm_global_reference *ref);
extern int ttm_bo_device_release(struct ttm_bo_device *bdev);
/**
* ttm_bo_device_init
*
* @bdev: A pointer to a struct ttm_bo_device to initialize.
* @glob: A pointer to an initialized struct ttm_bo_global.
* @driver: A pointer to a struct ttm_bo_driver set up by the caller.
* @file_page_offset: Offset into the device address space that is available
* for buffer data. This ensures compatibility with other users of the
* address space.
*
* Initializes a struct ttm_bo_device:
* Returns:
* !0: Failure.
*/
extern int ttm_bo_device_init(struct ttm_bo_device *bdev,
struct ttm_bo_global *glob,
struct ttm_bo_driver *driver,
uint64_t file_page_offset, bool need_dma32);
/**
* ttm_bo_unmap_virtual
*
* @bo: tear down the virtual mappings for this BO
*/
extern void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
/**
* ttm_bo_unmap_virtual
*
* @bo: tear down the virtual mappings for this BO
*
* The caller must take ttm_mem_io_lock before calling this function.
*/
extern void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo);
extern int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo);
extern void ttm_mem_io_free_vm(struct ttm_buffer_object *bo);
extern int ttm_mem_io_lock(struct ttm_mem_type_manager *man,
bool interruptible);
extern void ttm_mem_io_unlock(struct ttm_mem_type_manager *man);
/**
* ttm_bo_reserve:
*
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Sleep interruptible if waiting.
* @no_wait: Don't sleep while trying to reserve, rather return -EBUSY.
* @use_sequence: If @bo is already reserved, Only sleep waiting for
* it to become unreserved if @sequence < (@bo)->sequence.
*
* Locks a buffer object for validation. (Or prevents other processes from
* locking it for validation) and removes it from lru lists, while taking
* a number of measures to prevent deadlocks.
*
* Deadlocks may occur when two processes try to reserve multiple buffers in
* different order, either by will or as a result of a buffer being evicted
* to make room for a buffer already reserved. (Buffers are reserved before
* they are evicted). The following algorithm prevents such deadlocks from
* occurring:
* 1) Buffers are reserved with the lru spinlock held. Upon successful
* reservation they are removed from the lru list. This stops a reserved buffer
* from being evicted. However the lru spinlock is released between the time
* a buffer is selected for eviction and the time it is reserved.
* Therefore a check is made when a buffer is reserved for eviction, that it
* is still the first buffer in the lru list, before it is removed from the
* list. @check_lru == 1 forces this check. If it fails, the function returns
* -EINVAL, and the caller should then choose a new buffer to evict and repeat
* the procedure.
* 2) Processes attempting to reserve multiple buffers other than for eviction,
* (typically execbuf), should first obtain a unique 32-bit
* validation sequence number,
* and call this function with @use_sequence == 1 and @sequence == the unique
* sequence number. If upon call of this function, the buffer object is already
* reserved, the validation sequence is checked against the validation
* sequence of the process currently reserving the buffer,
* and if the current validation sequence is greater than that of the process
* holding the reservation, the function returns -EAGAIN. Otherwise it sleeps
* waiting for the buffer to become unreserved, after which it retries
* reserving.
* The caller should, when receiving an -EAGAIN error
* release all its buffer reservations, wait for @bo to become unreserved, and
* then rerun the validation with the same validation sequence. This procedure
* will always guarantee that the process with the lowest validation sequence
* will eventually succeed, preventing both deadlocks and starvation.
*
* Returns:
* -EAGAIN: The reservation may cause a deadlock.
* Release all buffer reservations, wait for @bo to become unreserved and
* try again. (only if use_sequence == 1).
* -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
* a signal. Release all buffer reservations and return to user-space.
* -EBUSY: The function needed to sleep, but @no_wait was true
* -EDEADLK: Bo already reserved using @sequence. This error code will only
* be returned if @use_sequence is set to true.
*/
extern int ttm_bo_reserve(struct ttm_buffer_object *bo,
bool interruptible,
bool no_wait, bool use_sequence, uint32_t sequence);
/**
* ttm_bo_reserve_locked:
*
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Sleep interruptible if waiting.
* @no_wait: Don't sleep while trying to reserve, rather return -EBUSY.
* @use_sequence: If @bo is already reserved, Only sleep waiting for
* it to become unreserved if @sequence < (@bo)->sequence.
*
* Must be called with struct ttm_bo_global::lru_lock held,
* and will not remove reserved buffers from the lru lists.
* The function may release the LRU spinlock if it needs to sleep.
* Otherwise identical to ttm_bo_reserve.
*
* Returns:
* -EAGAIN: The reservation may cause a deadlock.
* Release all buffer reservations, wait for @bo to become unreserved and
* try again. (only if use_sequence == 1).
* -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
* a signal. Release all buffer reservations and return to user-space.
* -EBUSY: The function needed to sleep, but @no_wait was true
* -EDEADLK: Bo already reserved using @sequence. This error code will only
* be returned if @use_sequence is set to true.
*/
extern int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
bool interruptible,
bool no_wait, bool use_sequence,
uint32_t sequence);
/**
* ttm_bo_unreserve
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Unreserve a previous reservation of @bo.
*/
extern void ttm_bo_unreserve(struct ttm_buffer_object *bo);
/**
* ttm_bo_unreserve_locked
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Unreserve a previous reservation of @bo.
* Needs to be called with struct ttm_bo_global::lru_lock held.
*/
extern void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo);
/**
* ttm_bo_wait_unreserved
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Wait for a struct ttm_buffer_object to become unreserved.
* This is typically used in the execbuf code to relax cpu-usage when
* a potential deadlock condition backoff.
*/
extern int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo,
bool interruptible);
/*
* ttm_bo_util.c
*/
/**
* ttm_bo_move_ttm
*
* @bo: A pointer to a struct ttm_buffer_object.
* @evict: 1: This is an eviction. Don't try to pipeline.
* @no_wait_gpu: Return immediately if the GPU is busy.
* @new_mem: struct ttm_mem_reg indicating where to move.
*
* Optimized move function for a buffer object with both old and
* new placement backed by a TTM. The function will, if successful,
* free any old aperture space, and set (@new_mem)->mm_node to NULL,
* and update the (@bo)->mem placement flags. If unsuccessful, the old
* data remains untouched, and it's up to the caller to free the
* memory space indicated by @new_mem.
* Returns:
* !0: Failure.
*/
extern int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
bool evict, bool no_wait_gpu,
struct ttm_mem_reg *new_mem);
/**
* ttm_bo_move_memcpy
*
* @bo: A pointer to a struct ttm_buffer_object.
* @evict: 1: This is an eviction. Don't try to pipeline.
* @no_wait_gpu: Return immediately if the GPU is busy.
* @new_mem: struct ttm_mem_reg indicating where to move.
*
* Fallback move function for a mappable buffer object in mappable memory.
* The function will, if successful,
* free any old aperture space, and set (@new_mem)->mm_node to NULL,
* and update the (@bo)->mem placement flags. If unsuccessful, the old
* data remains untouched, and it's up to the caller to free the
* memory space indicated by @new_mem.
* Returns:
* !0: Failure.
*/
extern int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
bool evict, bool no_wait_gpu,
struct ttm_mem_reg *new_mem);
/**
* ttm_bo_free_old_node
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Utility function to free an old placement after a successful move.
*/
extern void ttm_bo_free_old_node(struct ttm_buffer_object *bo);
/**
* ttm_bo_move_accel_cleanup.
*
* @bo: A pointer to a struct ttm_buffer_object.
* @sync_obj: A sync object that signals when moving is complete.
* @evict: This is an evict move. Don't return until the buffer is idle.
* @no_wait_gpu: Return immediately if the GPU is busy.
* @new_mem: struct ttm_mem_reg indicating where to move.
*
* Accelerated move function to be called when an accelerated move
* has been scheduled. The function will create a new temporary buffer object
* representing the old placement, and put the sync object on both buffer
* objects. After that the newly created buffer object is unref'd to be
* destroyed when the move is complete. This will help pipeline
* buffer moves.
*/
extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
void *sync_obj,
bool evict, bool no_wait_gpu,
struct ttm_mem_reg *new_mem);
/**
* ttm_io_prot
*
* @c_state: Caching state.
* @tmp: Page protection flag for a normal, cached mapping.
*
* Utility function that returns the pgprot_t that should be used for
* setting up a PTE with the caching model indicated by @c_state.
*/
extern pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp);
extern const struct ttm_mem_type_manager_func ttm_bo_manager_func;
#if (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
#define TTM_HAS_AGP
#include <linux/agp_backend.h>
/**
* ttm_agp_tt_create
*
* @bdev: Pointer to a struct ttm_bo_device.
* @bridge: The agp bridge this device is sitting on.
* @size: Size of the data needed backing.
* @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
* @dummy_read_page: See struct ttm_bo_device.
*
*
* Create a TTM backend that uses the indicated AGP bridge as an aperture
* for TT memory. This function uses the linux agpgart interface to
* bind and unbind memory backing a ttm_tt.
*/
extern struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
struct agp_bridge_data *bridge,
unsigned long size, uint32_t page_flags,
struct page *dummy_read_page);
int ttm_agp_tt_populate(struct ttm_tt *ttm);
void ttm_agp_tt_unpopulate(struct ttm_tt *ttm);
#endif
#endif

/drivers/include/drm/ttm/ttm_memory.h
1,159 → 1,158
/**************************************************************************
*
* 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.
*
**************************************************************************/
#ifndef TTM_MEMORY_H
#define TTM_MEMORY_H
//#include <linux/workqueue.h>
#include <linux/spinlock.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_srink,
* 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.
* @queue: Wait queue for processes suspended waiting for memory.
* @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;
// wait_queue_head_t queue;
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;
}
/**
* 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;
}
/**
* 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);
}
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);
#endif
/**************************************************************************
*
* 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.
*
**************************************************************************/
#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;
}
/**
* 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;
}
/**
* 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);
}
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);
#endif

/drivers/include/drm/ttm/ttm_module.h
1,60 → 1,40
/**************************************************************************
*
* Copyright 2008-2009 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.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#ifndef _TTM_MODULE_H_
#define _TTM_MODULE_H_
#include <linux/kernel.h>
struct kobject;
#define TTM_PFX "[TTM] "
enum ttm_global_types {
TTM_GLOBAL_TTM_MEM = 0,
TTM_GLOBAL_TTM_BO,
TTM_GLOBAL_TTM_OBJECT,
TTM_GLOBAL_NUM
};
struct ttm_global_reference {
enum ttm_global_types global_type;
size_t size;
void *object;
int (*init) (struct ttm_global_reference *);
void (*release) (struct ttm_global_reference *);
};
extern void ttm_global_init(void);
extern void ttm_global_release(void);
extern int ttm_global_item_ref(struct ttm_global_reference *ref);
extern void ttm_global_item_unref(struct ttm_global_reference *ref);
extern struct kobject *ttm_get_kobj(void);
#endif /* _TTM_MODULE_H_ */
/**************************************************************************
*
* Copyright 2008-2009 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.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#ifndef _TTM_MODULE_H_
#define _TTM_MODULE_H_
#include <linux/kernel.h>
struct kobject;
#define TTM_PFX "[TTM] "
extern struct kobject *ttm_get_kobj(void);
#endif /* _TTM_MODULE_H_ */

/drivers/include/drm/ttm/ttm_placement.h
1,92 → 1,92
/**************************************************************************
*
* 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.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#ifndef _TTM_PLACEMENT_H_
#define _TTM_PLACEMENT_H_
/*
* Memory regions for data placement.
*/
#define TTM_PL_SYSTEM 0
#define TTM_PL_TT 1
#define TTM_PL_VRAM 2
#define TTM_PL_PRIV0 3
#define TTM_PL_PRIV1 4
#define TTM_PL_PRIV2 5
#define TTM_PL_PRIV3 6
#define TTM_PL_PRIV4 7
#define TTM_PL_PRIV5 8
#define TTM_PL_SWAPPED 15
#define TTM_PL_FLAG_SYSTEM (1 << TTM_PL_SYSTEM)
#define TTM_PL_FLAG_TT (1 << TTM_PL_TT)
#define TTM_PL_FLAG_VRAM (1 << TTM_PL_VRAM)
#define TTM_PL_FLAG_PRIV0 (1 << TTM_PL_PRIV0)
#define TTM_PL_FLAG_PRIV1 (1 << TTM_PL_PRIV1)
#define TTM_PL_FLAG_PRIV2 (1 << TTM_PL_PRIV2)
#define TTM_PL_FLAG_PRIV3 (1 << TTM_PL_PRIV3)
#define TTM_PL_FLAG_PRIV4 (1 << TTM_PL_PRIV4)
#define TTM_PL_FLAG_PRIV5 (1 << TTM_PL_PRIV5)
#define TTM_PL_FLAG_SWAPPED (1 << TTM_PL_SWAPPED)
#define TTM_PL_MASK_MEM 0x0000FFFF
/*
* Other flags that affects data placement.
* TTM_PL_FLAG_CACHED indicates cache-coherent mappings
* if available.
* TTM_PL_FLAG_SHARED means that another application may
* reference the buffer.
* TTM_PL_FLAG_NO_EVICT means that the buffer may never
* be evicted to make room for other buffers.
*/
#define TTM_PL_FLAG_CACHED (1 << 16)
#define TTM_PL_FLAG_UNCACHED (1 << 17)
#define TTM_PL_FLAG_WC (1 << 18)
#define TTM_PL_FLAG_SHARED (1 << 20)
#define TTM_PL_FLAG_NO_EVICT (1 << 21)
#define TTM_PL_MASK_CACHING (TTM_PL_FLAG_CACHED | \
TTM_PL_FLAG_UNCACHED | \
TTM_PL_FLAG_WC)
#define TTM_PL_MASK_MEMTYPE (TTM_PL_MASK_MEM | TTM_PL_MASK_CACHING)
/*
* Access flags to be used for CPU- and GPU- mappings.
* The idea is that the TTM synchronization mechanism will
* allow concurrent READ access and exclusive write access.
* Currently GPU- and CPU accesses are exclusive.
*/
#define TTM_ACCESS_READ (1 << 0)
#define TTM_ACCESS_WRITE (1 << 1)
#endif
/**************************************************************************
*
* 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.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#ifndef _TTM_PLACEMENT_H_
#define _TTM_PLACEMENT_H_
/*
* Memory regions for data placement.
*/
#define TTM_PL_SYSTEM 0
#define TTM_PL_TT 1
#define TTM_PL_VRAM 2
#define TTM_PL_PRIV0 3
#define TTM_PL_PRIV1 4
#define TTM_PL_PRIV2 5
#define TTM_PL_PRIV3 6
#define TTM_PL_PRIV4 7
#define TTM_PL_PRIV5 8
#define TTM_PL_SWAPPED 15
#define TTM_PL_FLAG_SYSTEM (1 << TTM_PL_SYSTEM)
#define TTM_PL_FLAG_TT (1 << TTM_PL_TT)
#define TTM_PL_FLAG_VRAM (1 << TTM_PL_VRAM)
#define TTM_PL_FLAG_PRIV0 (1 << TTM_PL_PRIV0)
#define TTM_PL_FLAG_PRIV1 (1 << TTM_PL_PRIV1)
#define TTM_PL_FLAG_PRIV2 (1 << TTM_PL_PRIV2)
#define TTM_PL_FLAG_PRIV3 (1 << TTM_PL_PRIV3)
#define TTM_PL_FLAG_PRIV4 (1 << TTM_PL_PRIV4)
#define TTM_PL_FLAG_PRIV5 (1 << TTM_PL_PRIV5)
#define TTM_PL_FLAG_SWAPPED (1 << TTM_PL_SWAPPED)
#define TTM_PL_MASK_MEM 0x0000FFFF
/*
* Other flags that affects data placement.
* TTM_PL_FLAG_CACHED indicates cache-coherent mappings
* if available.
* TTM_PL_FLAG_SHARED means that another application may
* reference the buffer.
* TTM_PL_FLAG_NO_EVICT means that the buffer may never
* be evicted to make room for other buffers.
*/
#define TTM_PL_FLAG_CACHED (1 << 16)
#define TTM_PL_FLAG_UNCACHED (1 << 17)
#define TTM_PL_FLAG_WC (1 << 18)
#define TTM_PL_FLAG_SHARED (1 << 20)
#define TTM_PL_FLAG_NO_EVICT (1 << 21)
#define TTM_PL_MASK_CACHING (TTM_PL_FLAG_CACHED | \
TTM_PL_FLAG_UNCACHED | \
TTM_PL_FLAG_WC)
#define TTM_PL_MASK_MEMTYPE (TTM_PL_MASK_MEM | TTM_PL_MASK_CACHING)
/*
* Access flags to be used for CPU- and GPU- mappings.
* The idea is that the TTM synchronization mechanism will
* allow concurrent READ access and exclusive write access.
* Currently GPU- and CPU accesses are exclusive.
*/
#define TTM_ACCESS_READ (1 << 0)
#define TTM_ACCESS_WRITE (1 << 1)
#endif

/drivers/include/linux/kernel.h
203,7 → 203,14
typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
struct file {};
struct file
{
struct page **pages; /* physical memory backend */
unsigned int count;
unsigned int allocated;
void *vma;
};
struct vm_area_struct {};
struct address_space {};

/drivers/include/linux/mm.h
1,0 → 0,0
#ifndef _LINUX_MM_H
#define _LINUX_MM_H
#define VM_NORESERVE 0x00200000
#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
#endif