drivers/infiniband/hw/hfi1/user_exp_rcv.h

Source file repositories/reference/linux-study-clean/drivers/infiniband/hw/hfi1/user_exp_rcv.h

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/hw/hfi1/user_exp_rcv.h
Extension
.h
Size
1645 bytes
Lines
67
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 tid_pageset {
	u16 idx;
	u16 count;
};

struct tid_user_buf {
	struct mmu_interval_notifier notifier;
	struct mutex cover_mutex;
	unsigned long vaddr;
	unsigned long length;
	unsigned int npages;
	struct page **pages;
	unsigned int n_psets;
	struct tid_pageset psets[];
};

struct tid_rb_node {
	struct mmu_interval_notifier notifier;
	struct hfi1_filedata *fdata;
	struct mutex invalidate_mutex; /* covers hw removal */
	unsigned long phys;
	struct tid_group *grp;
	u32 rcventry;
	dma_addr_t dma_addr;
	bool freed;
	unsigned int npages;
	struct page *pages[] __counted_by(npages);
};

static inline int num_user_pages(unsigned long addr,
				 unsigned long len)
{
	const unsigned long spage = addr & PAGE_MASK;
	const unsigned long epage = (addr + len - 1) & PAGE_MASK;

	return 1 + ((epage - spage) >> PAGE_SHIFT);
}

int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd,
			   struct hfi1_ctxtdata *uctxt);
void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd);
int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
			    struct hfi1_tid_info *tinfo);
int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
			    struct hfi1_tid_info *tinfo);
int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd,
			      struct hfi1_tid_info *tinfo);

static inline struct mm_struct *mm_from_tid_node(struct tid_rb_node *node)
{
	return node->notifier.mm;
}

#endif /* _HFI1_USER_EXP_RCV_H */

Annotation

Implementation Notes