drivers/infiniband/core/frmr_pools.h

Source file repositories/reference/linux-study-clean/drivers/infiniband/core/frmr_pools.h

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/core/frmr_pools.h
Extension
.h
Size
1509 bytes
Lines
64
Domain
Driver Families
Bucket
drivers/infiniband
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct frmr_handles_page {
	struct list_head list;
	u32 handles[NUM_HANDLES_PER_PAGE];
};

/* FRMR queue holds a list of frmr_handles_page.
 * num_pages: number of pages in the queue.
 * ci: current index in the handles array across all pages.
 */
struct frmr_queue {
	struct list_head pages_list;
	u32 num_pages;
	unsigned long ci;
};

struct ib_frmr_pool {
	struct rb_node node;
	struct ib_frmr_key key; /* Pool key */

	/* Protect access to the queue */
	spinlock_t lock;
	struct frmr_queue queue;
	struct frmr_queue inactive_queue;

	struct delayed_work aging_work;
	struct ib_device *device;

	u32 max_in_use;
	u32 in_use;
	u32 pinned_handles;
};

struct ib_frmr_pools {
	struct rb_root rb_root;
	rwlock_t rb_lock;
	const struct ib_frmr_pool_ops *pool_ops;

	struct workqueue_struct *aging_wq;
	u32 aging_period_sec;
};

int ib_frmr_pools_set_pinned(struct ib_device *device, struct ib_frmr_key *key,
			     u32 pinned_handles);
int ib_frmr_pools_set_aging_period(struct ib_device *device, u32 period_sec);
#endif /* RDMA_CORE_FRMR_POOLS_H */

Annotation

Implementation Notes