drivers/infiniband/hw/mthca/mthca_memfree.h

Source file repositories/reference/linux-study-clean/drivers/infiniband/hw/mthca/mthca_memfree.h

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/hw/mthca/mthca_memfree.h
Extension
.h
Size
5783 bytes
Lines
180
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 mthca_icm_chunk {
	struct list_head   list;
	int                npages;
	int                nsg;
	struct scatterlist mem[MTHCA_ICM_CHUNK_LEN];
};

struct mthca_icm {
	struct list_head chunk_list;
	int              refcount;
};

struct mthca_icm_table {
	u64               virt;
	int               num_icm;
	int               num_obj;
	int               obj_size;
	int               lowmem;
	int               coherent;
	struct mutex      mutex;
	struct mthca_icm *icm[] __counted_by(num_icm);
};

struct mthca_icm_iter {
	struct mthca_icm       *icm;
	struct mthca_icm_chunk *chunk;
	int                     page_idx;
};

struct mthca_dev;

struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
				  gfp_t gfp_mask, int coherent);
void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent);

struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
					      u64 virt, int obj_size,
					      int nobj, int reserved,
					      int use_lowmem, int use_coherent);
void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table);
int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle);
int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
			  int start, int end);
void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,
			   int start, int end);

static inline void mthca_icm_first(struct mthca_icm *icm,
				   struct mthca_icm_iter *iter)
{
	iter->icm      = icm;
	iter->chunk    = list_empty(&icm->chunk_list) ?
		NULL : list_entry(icm->chunk_list.next,
				  struct mthca_icm_chunk, list);
	iter->page_idx = 0;
}

static inline int mthca_icm_last(struct mthca_icm_iter *iter)
{
	return !iter->chunk;
}

static inline void mthca_icm_next(struct mthca_icm_iter *iter)
{
	if (++iter->page_idx >= iter->chunk->nsg) {
		if (iter->chunk->list.next == &iter->icm->chunk_list) {
			iter->chunk = NULL;
			return;
		}

		iter->chunk = list_entry(iter->chunk->list.next,
					 struct mthca_icm_chunk, list);
		iter->page_idx = 0;
	}
}

static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter)
{
	return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
}

static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter)
{
	return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
}

struct mthca_db_page {
	DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE);
	__be64    *db_rec;

Annotation

Implementation Notes