Lines Matching +full:dma +full:- +full:write

38 .Bd -ragged -offset indent
45 .Bd -literal -offset indent
51 .Bd -ragged -offset indent
62 Programs can open these device special files and perform register-level
72 Especially hardware diagnostics requires a somewhat user-friendly interface
79 .Xr write 2
86 .Xr write 2
101 whence value of SEEK_SET will target port 0x3fc on the next read or write
111 .Bd -literal
129 .Xr write 2
135 .Ss DMA pseudo resource
138 is created for the purpose of doing DMA.
147 .Xr write 2 .
152 .Bd -literal
188 field is used to specify which DMA operation is to be performed.
193 The following DMA operations are defined:
194 .Bl -tag -width XXXX
199 field is set on output with the key of the DMA tag.
202 sub-structure.
217 sub-structure.
220 sub-structure on return.
235 sub-structure.
241 sub-structure is filled on return with details of the allocation.
279 the hardware to behave in unpredictable ways when DMA has not stopped
286 sub-structure.
307 sub-structure contains the result of the operation.
329 A sub-section of the memory can be targeted by specifying the relative
337 sub-structure.
353 .Xr write 2 .
363 .Bl -tag -width XXXXXX -compact -offset indent
380 This device special file provides the interfaces needed for doing DMA.
406 When the device has a DMA channel assigned to it, a device special file
410 This device special file provides the interfaces needed for doing DMA.
412 If the ISA device is not a Plug-and-Play device nor present in the ACPI
420 .Bl -tag -width XXXXXX -compact -offset indent
427 .Bl -tag -width XXXXXX -compact -offset indent
438 .Xr write 2 ,
459 At the very least, an operation is needed on the DMA pseudo resource
472 The details of how a program is to interact with the DMA controller still