linux-4.4.1/ion_buffer
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開始行:
*参照元 [#k14b590d]
#backlinks
*説明 [#tc0032f7]
-パス: [[linux-4.4.1/drivers/staging/android/ion/ion_priv...
-FIXME: これは何？
--ION ヒープから確保した ION バッファ
--ION ヒープ: [[linux-4.4.1/ion_heap]]
--バッファ確保: [[linux-4.4.1/ion_buffer_create()]]
--バッファ解放: [[linux-4.4.1/ion_buffer_destroy()]]
**参考 [#cb8f9876]
*実装 [#f17c5f19]
/**
* struct ion_buffer - metadata for a particular buffer
* @ref: reference count
* @node: node in the ion_device buffers t...
* @dev: back pointer to the ion_device
* @heap: back pointer to the heap the buf...
* @flags: buffer specific flags
* @private_flags: internal buffer specific flags
* @size: size of the buffer
* @priv_virt: private data to the buffer repre...
* a void *
* @priv_phys: private data to the buffer repre...
* an ion_phys_addr_t (and someday ...
* @lock: protects the buffers cnt fields
* @kmap_cnt: number of times the buffer is ma...
* @vaddr: the kernel mapping if kmap_cnt i...
* @dmap_cnt: number of times the buffer is ma...
* @sg_table: the sg table for the buffer if d...
* @pages: flat array of pages in the buffe...
* handler and only valid for buffe...
* @vmas: list of vma's mapping this buffer
* @handle_count: count of handles referencing thi...
* @task_comm: taskcomm of last client to refer...
* handle, used for debugging
* @pid: pid of last client to reference ...
* handle, used for debugging
*/
struct ion_buffer {
struct kref ref;
-
--[[linux-4.4.1/kref]]
union {
struct rb_node node;
struct list_head list;
};
-
--[[linux-4.4.1/rb_node]]
--[[linux-4.4.1/list_head]]
struct ion_device *dev;
struct ion_heap *heap;
-
--[[linux-4.4.1/ion_device]]
--[[linux-4.4.1/ion_heap]]
unsigned long flags;
unsigned long private_flags;
size_t size;
union {
void *priv_virt;
ion_phys_addr_t priv_phys;
};
-
--[[linux-4.4.1/ion_phys_addr_t]]
struct mutex lock;
int kmap_cnt;
void *vaddr;
int dmap_cnt;
-
--[[linux-4.4.1/mutex]]
struct sg_table *sg_table;
struct page **pages;
struct list_head vmas;
-
--[[linux-4.4.1/sg_table]]
--[[linux-4.4.1/page]]
--[[linux-4.4.1/list_head]]
/* used to track orphaned buffers */
int handle_count;
char task_comm[TASK_COMM_LEN];
pid_t pid;
-
--[[linux-4.4.1/pid_t]]
};
*コメント [#t1b4e2a7]
終了行:
*参照元 [#k14b590d]
#backlinks
*説明 [#tc0032f7]
-パス: [[linux-4.4.1/drivers/staging/android/ion/ion_priv...
-FIXME: これは何？
--ION ヒープから確保した ION バッファ
--ION ヒープ: [[linux-4.4.1/ion_heap]]
--バッファ確保: [[linux-4.4.1/ion_buffer_create()]]
--バッファ解放: [[linux-4.4.1/ion_buffer_destroy()]]
**参考 [#cb8f9876]
*実装 [#f17c5f19]
/**
* struct ion_buffer - metadata for a particular buffer
* @ref: reference count
* @node: node in the ion_device buffers t...
* @dev: back pointer to the ion_device
* @heap: back pointer to the heap the buf...
* @flags: buffer specific flags
* @private_flags: internal buffer specific flags
* @size: size of the buffer
* @priv_virt: private data to the buffer repre...
* a void *
* @priv_phys: private data to the buffer repre...
* an ion_phys_addr_t (and someday ...
* @lock: protects the buffers cnt fields
* @kmap_cnt: number of times the buffer is ma...
* @vaddr: the kernel mapping if kmap_cnt i...
* @dmap_cnt: number of times the buffer is ma...
* @sg_table: the sg table for the buffer if d...
* @pages: flat array of pages in the buffe...
* handler and only valid for buffe...
* @vmas: list of vma's mapping this buffer
* @handle_count: count of handles referencing thi...
* @task_comm: taskcomm of last client to refer...
* handle, used for debugging
* @pid: pid of last client to reference ...
* handle, used for debugging
*/
struct ion_buffer {
struct kref ref;
-
--[[linux-4.4.1/kref]]
union {
struct rb_node node;
struct list_head list;
};
-
--[[linux-4.4.1/rb_node]]
--[[linux-4.4.1/list_head]]
struct ion_device *dev;
struct ion_heap *heap;
-
--[[linux-4.4.1/ion_device]]
--[[linux-4.4.1/ion_heap]]
unsigned long flags;
unsigned long private_flags;
size_t size;
union {
void *priv_virt;
ion_phys_addr_t priv_phys;
};
-
--[[linux-4.4.1/ion_phys_addr_t]]
struct mutex lock;
int kmap_cnt;
void *vaddr;
int dmap_cnt;
-
--[[linux-4.4.1/mutex]]
struct sg_table *sg_table;
struct page **pages;
struct list_head vmas;
-
--[[linux-4.4.1/sg_table]]
--[[linux-4.4.1/page]]
--[[linux-4.4.1/list_head]]
/* used to track orphaned buffers */
int handle_count;
char task_comm[TASK_COMM_LEN];
pid_t pid;
-
--[[linux-4.4.1/pid_t]]
};
*コメント [#t1b4e2a7]
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