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Linux Kernel
3.7.1
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Linux Kernel
3.7.1
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#include <ttm_bo_api.h>
Data Fields | |
| 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 |
| struct kref | kref |
| struct kref | list_kref |
| wait_queue_head_t | event_queue |
| struct ttm_mem_reg | mem |
| struct file * | persistent_swap_storage |
| struct ttm_tt * | ttm |
| bool | evicted |
| atomic_t | cpu_writers |
| 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 |
| atomic_t | reserved |
| void * | sync_obj_arg |
| void * | sync_obj |
| unsigned long | priv_flags |
| struct rb_node | vm_rb |
| struct drm_mm_node * | vm_node |
| unsigned long | offset |
| uint32_t | cur_placement |
| struct sg_table * | sg |
struct ttm_buffer_object
: Pointer to the buffer object device structure. : The virtual user-space start address of ttm_bo_type_user buffers. : The bo type. : Destruction function. If NULL, kfree is used. : Actual number of pages. : Address space offset. : Accounted size for this object. : Reference count of this buffer object. When this refcount reaches zero, the object is put on the delayed delete list. : 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. : Queue for processes waiting on buffer object status change. : structure describing current placement. : 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 structure holding system pages. : Whether the object was evicted without user-space knowing. : For synchronization. Number of cpu writers. : List head for the lru list. : List head for the delayed destroy list. : List head for swap LRU list. : Sequence of the validation holding the lock. Used to avoid starvation when many processes compete to validate the buffer. This member is protected by the bo_device::lru_lock. : The value of is valid. This value is protected by the bo_device::lru_lock. : Deadlock-free lock used for synchronization state transitions. : Opaque argument to synchronization object function. : Pointer to a synchronization object. : Flags describing buffer object internal state. : Rb node for the vm rb tree. : Address space manager node. : The current GPU offset, which can have different meanings depending on the memory type. For SYSTEM type memory, it should be 0. : 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 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.
Definition at line 196 of file ttm_bo_api.h.
| size_t acc_size |
Definition at line 208 of file ttm_bo_api.h.
| uint64_t addr_space_offset |
Definition at line 207 of file ttm_bo_api.h.
| struct ttm_bo_device* bdev |
Definition at line 202 of file ttm_bo_api.h.
| unsigned long buffer_start |
Definition at line 203 of file ttm_bo_api.h.
| atomic_t cpu_writers |
Members protected by the bo::reserved lock only when written to.
Definition at line 231 of file ttm_bo_api.h.
| uint32_t cur_placement |
Definition at line 277 of file ttm_bo_api.h.
Definition at line 238 of file ttm_bo_api.h.
| void(* destroy)(struct ttm_buffer_object *) |
Definition at line 205 of file ttm_bo_api.h.
Definition at line 216 of file ttm_bo_api.h.
| bool evicted |
Definition at line 225 of file ttm_bo_api.h.
| struct ttm_bo_global* glob |
Members constant at init.
Definition at line 201 of file ttm_bo_api.h.
Definition at line 240 of file ttm_bo_api.h.
Members not needing protection.
Definition at line 214 of file ttm_bo_api.h.
Definition at line 215 of file ttm_bo_api.h.
Members protected by the bdev::lru_lock.
Definition at line 237 of file ttm_bo_api.h.
Members protected by the bo::reserved lock.
Definition at line 222 of file ttm_bo_api.h.
| unsigned long num_pages |
Definition at line 206 of file ttm_bo_api.h.
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.
Definition at line 276 of file ttm_bo_api.h.
Definition at line 223 of file ttm_bo_api.h.
| unsigned long priv_flags |
Definition at line 260 of file ttm_bo_api.h.
| atomic_t reserved |
Members protected by the bdev::lru_lock only when written to.
Definition at line 249 of file ttm_bo_api.h.
| bool seq_valid |
Definition at line 242 of file ttm_bo_api.h.
Definition at line 279 of file ttm_bo_api.h.
Definition at line 239 of file ttm_bo_api.h.
| void* sync_obj |
Definition at line 259 of file ttm_bo_api.h.
| void* sync_obj_arg |
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.
Definition at line 258 of file ttm_bo_api.h.
Definition at line 224 of file ttm_bo_api.h.
| enum ttm_bo_type type |
Definition at line 204 of file ttm_bo_api.h.
| uint32_t val_seq |
Definition at line 241 of file ttm_bo_api.h.
| struct drm_mm_node* vm_node |
Definition at line 267 of file ttm_bo_api.h.
Members protected by the bdev::vm_lock
Definition at line 266 of file ttm_bo_api.h.
1.8.2