include/uapi/rdma/hfi/hfi1_ioctl.h

Source file repositories/reference/linux-study-clean/include/uapi/rdma/hfi/hfi1_ioctl.h

File Facts

System
Linux kernel
Corpus path
include/uapi/rdma/hfi/hfi1_ioctl.h
Extension
.h
Size
6618 bytes
Lines
175
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct hfi1_user_info {
	/*
	 * version of user software, to detect compatibility issues.
	 * Should be set to HFI1_USER_SWVERSION.
	 */
	__u32 userversion;
	__u32 pad;
	/*
	 * If two or more processes wish to share a context, each process
	 * must set the subcontext_cnt and subcontext_id to the same
	 * values.  The only restriction on the subcontext_id is that
	 * it be unique for a given node.
	 */
	__u16 subctxt_cnt;
	__u16 subctxt_id;
	/* 128bit UUID passed in by PSM. */
	__u8 uuid[16];
};

struct hfi1_ctxt_info {
	__aligned_u64 runtime_flags;    /* chip/drv runtime flags (HFI1_CAP_*) */
	__u32 rcvegr_size;      /* size of each eager buffer */
	__u16 num_active;       /* number of active units */
	__u16 unit;             /* unit (chip) assigned to caller */
	__u16 ctxt;             /* ctxt on unit assigned to caller */
	__u16 subctxt;          /* subctxt on unit assigned to caller */
	__u16 rcvtids;          /* number of Rcv TIDs for this context */
	__u16 credits;          /* number of PIO credits for this context */
	__u16 numa_node;        /* NUMA node of the assigned device */
	__u16 rec_cpu;          /* cpu # for affinity (0xffff if none) */
	__u16 send_ctxt;        /* send context in use by this user context */
	__u16 egrtids;          /* number of RcvArray entries for Eager Rcvs */
	__u16 rcvhdrq_cnt;      /* number of RcvHdrQ entries */
	__u16 rcvhdrq_entsize;  /* size (in bytes) for each RcvHdrQ entry */
	__u16 sdma_ring_size;   /* number of entries in SDMA request ring */
};

struct hfi1_tid_info {
	/* virtual address of first page in transfer */
	__aligned_u64 vaddr;
	/* pointer to tid array. this array is big enough */
	__aligned_u64 tidlist;
	/* number of tids programmed by this request */
	__u32 tidcnt;
	/* length of transfer buffer programmed by this request */
	__u32 length;
};

/*
 * This structure is returned by the driver immediately after
 * open to get implementation-specific info, and info specific to this
 * instance.
 *
 * This struct must have explicit pad fields where type sizes
 * may result in different alignments between 32 and 64 bit
 * programs, since the 64 bit * bit kernel requires the user code
 * to have matching offsets
 */
struct hfi1_base_info {
	/* version of hardware, for feature checking. */
	__u32 hw_version;
	/* version of software, for feature checking. */
	__u32 sw_version;
	/* Job key */
	__u16 jkey;
	__u16 padding1;
	/*
	 * The special QP (queue pair) value that identifies PSM
	 * protocol packet from standard IB packets.
	 */
	__u32 bthqp;
	/* PIO credit return address, */
	__aligned_u64 sc_credits_addr;
	/*
	 * Base address of write-only pio buffers for this process.
	 * Each buffer has sendpio_credits*64 bytes.
	 */
	__aligned_u64 pio_bufbase_sop;
	/*
	 * Base address of write-only pio buffers for this process.
	 * Each buffer has sendpio_credits*64 bytes.
	 */
	__aligned_u64 pio_bufbase;
	/* address where receive buffer queue is mapped into */
	__aligned_u64 rcvhdr_bufbase;
	/* base address of Eager receive buffers. */
	__aligned_u64 rcvegr_bufbase;
	/* base address of SDMA completion ring */
	__aligned_u64 sdma_comp_bufbase;
	/*

Annotation

Implementation Notes