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If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner] .TH dat_lmr_create 3DAT "28 Jan 2009" "SunOS 5.11" "Direct Access Transport Library Functions" .SH NAME dat_lmr_create \- register a memory region with an IA .SH SYNOPSIS .LP .nf cc [ \fIflag\fR\&.\|.\|. ] \fIfile\fR\&.\|.\|. \fB-ldat\fR [ \fIlibrary\fR\&.\|.\|. ] #include <\fBdat/udat.h\fR> DAT_RETURN dat_lmr_create ( IN DAT_IA_HANDLE ia_handle, IN DAT_MEM_TYPE mem_type, IN DAT_REGION_DESCRIPTION region_description, IN DAT_VLEN length, IN DAT_PZ_HANDLE pz_handle, IN DAT_MEM_PRIV_FLAGS mem_privileges, OUT DAT_LMR_HANDLE *lmr_handle, OUT DAT_LMR_CONTEXT *lmr_context, OUT DAT_RMR_CONTEXT *rmr_context, OUT DAT_VLEN *registered_size, OUT DAT_VADDR *registered_address ) .fi .SH PARAMETERS .sp .ne 2 .mk .na \fB\fIia_handle\fR\fR .ad .sp .6 .RS 4n Handle for an open instance of the IA. .RE .sp .ne 2 .mk .na \fB\fImem_type\fR\fR .ad .sp .6 .RS 4n Type of memory to be registered. The following list outlines the memory type specifications. .sp .ne 2 .mk .na \fB\fBDAT_MEM_TYPE_VIRTUAL\fR\fR .ad .sp .6 .RS 4n Consumer virtual memory. .sp Region description: A pointer to a contiguous user virtual range. .sp Length: Length of the Memory Region. .RE .sp .ne 2 .mk .na \fB\fBDAT_MEM_TYPE_SO_VIRTUAL\fR\fR .ad .sp .6 .RS 4n Consumer virtual memory with strong memory ordering. This type is a Solaris specific addition. If the \fIia_handle\fR was opened without \fBRO_AWARE_\fR (see \fBdat_ia_open\fR(3DAT)), then type \fBDAT_MEM_TYPE_VIRTUAL\fR is implicitly converted to this type. .sp Region description: A pointer to a contiguous user virtual range. .sp Length: Length of the Memory Region. .RE .sp .ne 2 .mk .na \fB\fBDAT_MEM_TYPE_LMR\fR\fR .ad .sp .6 .RS 4n LMR. .sp Region description: An LMR_handle. .sp Length: Length parameter is ignored. .RE .sp .ne 2 .mk .na \fB\fBDAT_MEM_TYPE_SHARED_VIRTUAL\fR\fR .ad .sp .6 .RS 4n Shared memory region. All DAT Consumers of the same uDAPL Provider specify the same Consumer cookie to indicate who is sharing the shared memory region. This supports a peer-to-peer model of shared memory. All DAT Consumers of the shared memory must allocate the memory region as shared memory using Platform-specific primitives. .sp Region description: A structure with 2 elements, where the first one is of type \fBDAT_LMR_COOKIE\fR and is a unique identifier of the shared memory region, and the second one is a pointer to a contiguous user virtual range. .sp Length: Length of the Memory Region .RE .RE .sp .ne 2 .mk .na \fB\fIregion_description\fR\fR .ad .sp .6 .RS 4n Pointer to type-specific data describing the memory in the region to be registered. The type is derived from the \fImem_type\fR parameter. .RE .sp .ne 2 .mk .na \fB\fIlength\fR\fR .ad .sp .6 .RS 4n Length parameter accompanying the region_description. .RE .sp .ne 2 .mk .na \fB\fIpz_handle\fR\fR .ad .sp .6 .RS 4n Handle for an instance of the Protection Zone. .RE .sp .ne 2 .mk .na \fB\fImem_privileges:\fR\fR .ad .sp .6 .RS 4n Consumer-requested memory access privileges for the registered local memory region. The Default value is \fBDAT_MEM_PRIV_NONE_FLAG\fR. The constant value \fBDAT_MEM_PRIV_ALL_FLAG\fR = 0x33, which specifies both Read and Write privileges, is also defined. Memory privilege definitions are as follows: .sp .ne 2 .mk .na \fBLocal Read\fR .ad .RS 16n .rt \fBDAT_MEM_PRIV_LOCAL_READ_FLAG\fR .sp .ne 2 .mk .na \fB0x01\fR .ad .RS 8n .rt Local read access requested. .RE .RE .sp .ne 2 .mk .na \fBLocal Write\fR .ad .RS 16n .rt \fBDAT_MEM_PRIV_LOCAL_WRITE_FLAG\fR .sp .ne 2 .mk .na \fB0x10\fR .ad .RS 8n .rt Local write access requested. .RE .RE .sp .ne 2 .mk .na \fBRemote Read\fR .ad .RS 16n .rt \fBDAT_MEM_PRIV_REMOTE_READ_FLAG\fR .sp .ne 2 .mk .na \fB0x02\fR .ad .RS 8n .rt Remote read access requested. .RE .RE .sp .ne 2 .mk .na \fBRemote Write\fR .ad .RS 16n .rt \fBDAT_MEM_PRIV_REMOTE_WRITE_FLAG\fR .sp .ne 2 .mk .na \fB0x20\fR .ad .RS 8n .rt Remote write access requested. .RE .RE .RE .sp .ne 2 .mk .na \fB\fIlmr_handle\fR\fR .ad .sp .6 .RS 4n Handle for the created instance of the LMR. .RE .sp .ne 2 .mk .na \fB\fIlmr_context\fR\fR .ad .sp .6 .RS 4n Context for the created instance of the LMR to use for DTO local buffers. .RE .sp .ne 2 .mk .na \fB\fIregistered_size\fR\fR .ad .sp .6 .RS 4n Actual memory size registered by the Provider. .RE .sp .ne 2 .mk .na \fB\fIregistered_address\fR\fR .ad .sp .6 .RS 4n Actual base address of the memory registered by the Provider. .RE .SH DESCRIPTION .sp .LP The \fBdat_lmr_create()\fR function registers a memory region with an IA. The specified buffer must have been previously allocated and pinned by the uDAPL Consumer on the platform. The Provider must do memory pinning if needed, which includes whatever OS-dependent steps are required to ensure that the memory is available on demand for the Interface Adapter. uDAPL does not require that the memory never be swapped out; just that neither the hardware nor the Consumer ever has to deal with it not being there. The created \fIlmr_context\fR can be used for local buffers of DTOs and for binding RMRs, and \fIlmr_handle\fR can be used for creating other LMRs. For uDAPL the scope of the \fIlmr_context\fR is the address space of the DAT Consumer. .sp .LP The return values of \fIregistered_size\fR and \fIregistered_address\fR indicate to the Consumer how much the contiguous region of Consumer virtual memory was registered by the Provider and where the region starts in the Consumer virtual address. .sp .LP The \fImem_type\fR parameter indicates to the Provider the kind of memory to be registered, and can take on any of the values defined in the table in the PARAMETERS section. .sp .LP The \fIpz_handle\fR parameter allows Consumers to restrict local accesses to the registered LMR by DTOs. .sp .LP \fBDAT_LMR_COOKIE\fR is a pointer to a unique identifier of the shared memory region of the \fBDAT_MEM_TYPE_SHARED_VIRTUAL\fR DAT memory type. The identifier is an array of 40 bytes allocated by the Consumer. The Provider must check the entire 40 bytes and shall not interpret it as a null-terminated string. .sp .LP The return value of \fIrmr_context\fR can be transferred by the local Consumer to a Consumer on a remote host to be used for an RDMA DTO. .sp .LP If \fImem_privileges\fR does not specify remote Read and Write privileges, \fIrmr_context\fR is not generated and \fINULL\fR is returned. No remote privileges are given for Memory Region unless explicitly asked for by the Consumer. .SH RETURN VALUES .sp .ne 2 .mk .na \fB\fBDAT_SUCCESS\fR\fR .ad .RS 30n .rt The operation was successful. .RE .sp .ne 2 .mk .na \fB\fBDAT_UNSUFFICIENT_RESOURCES\fR\fR .ad .RS 30n .rt The operation failed due to resource limitations. .RE .sp .ne 2 .mk .na \fB\fBDAT_INVALID_PARAMETER\fR\fR .ad .RS 30n .rt Invalid parameter. .RE .sp .ne 2 .mk .na \fB\fBDAT_INVALID_HANDLE\fR\fR .ad .RS 30n .rt Invalid DAT handle. .RE .sp .ne 2 .mk .na \fB\fBDAT_INVALID_STATE\fR\fR .ad .RS 30n .rt Parameter in an invalid state. For example, shared virtual buffer was not created shared by the platform. .RE .sp .ne 2 .mk .na \fB\fBDAT_MODEL_NOT_SUPPORTED\fR\fR .ad .RS 30n .rt The requested Model was not supported by the Provider. For example, requested Memory Type was not supported by the Provider. .RE .SH USAGE .sp .LP Consumers can create an LMR over the existing LMR memory with different Protection Zones and privileges using previously created IA translation table entries. .sp .LP The Consumer should use \fIrmr_context\fR with caution. Once advertised to a remote peer, the \fIrmr_context\fR of the LMR cannot be invalidated. The only way to invalidate it is to destroy the LMR with \fBdat_lmr_free\fR(3DAT). .SH ATTRIBUTES .sp .LP See \fBattributes\fR(5) for descriptions of the following attributes: .sp .sp .TS tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPEATTRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelSafe _ StandardT{ uDAPL, 1.1, 1.2 (except \fBDAT_MEM_TYPE_SO_VIRTUAL\fR) T} .TE .SH SEE ALSO .sp .LP \fBdat_lmr_free\fR(3DAT), \fBlibdat\fR(3LIB), \fBattributes\fR(5)