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There are 9 pins in a basic serial port.
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ddi_dma_buf_setup(9f) [php man page]

ddi_dma_buf_setup(9F)					   Kernel Functions for Drivers 				     ddi_dma_buf_setup(9F)

NAME
ddi_dma_buf_setup - easier DMA setup for use with buffer structures SYNOPSIS
#include <sys/ddi.h> #include <sys/sunddi.h> int ddi_dma_buf_setup(dev_info_t *dip, struct buf *bp, uint_t flags, int (*waitfp) (caddr_t),, caddr_t arg, ddi_dma_lim_t *lim, ddi_dma_handle_t *handlep); INTERFACE LEVEL
This interface is obsolete. ddi_dma_buf_bind_handle(9F) should be used instead. PARAMETERS
dip A pointer to the device's dev_info structure. bp A pointer to a system buffer structure (see buf(9S)). flags Flags that go into a ddi_dma_req structure (see ddi_dma_req(9S)). waitfp The address of a function to call back later if resources aren't available now. The special function addresses DDI_DMA_SLEEP and DDI_DMA_DONTWAIT (see ddi_dma_req(9S)) are taken to mean, respectively, wait until resources are avail- able, or do not wait at all and do not schedule a callback. arg Argument to be passed to a callback function, if such a function is specified. lim A pointer to a DMA limits structure for this device (see ddi_dma_lim_sparc(9S) or ddi_dma_lim_x86(9S)). If this pointer is NULL, a default set of DMA limits is assumed. handlep Pointer to a DMA handle. See ddi_dma_setup(9F) for a discussion of handle. DESCRIPTION
ddi_dma_buf_setup() is an interface to ddi_dma_setup(9F). It uses its arguments to construct an appropriate ddi_dma_req structure and calls ddi_dma_setup() with it. RETURN VALUES
See ddi_dma_setup(9F) for the possible return values for this function. CONTEXT
ddi_dma_buf_setup() can be called from user or interrupt context, except when waitfp is set to DDI_DMA_SLEEP, in which case it can be called from user context only. ATTRIBUTES
See attributes(5) for a description of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Stability Level |Obsolete | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5), ddi_dma_addr_setup(9F), ddi_dma_free(9F), ddi_dma_htoc(9F), ddi_dma_setup(9F), ddi_dma_sync(9F), physio(9F), buf(9S), ddi_dma_lim_sparc(9S), ddi_dma_lim_x86(9S), ddi_dma_req(9S) Writing Device Drivers SunOS 5.10 27 Sep 2002 ddi_dma_buf_setup(9F)

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ddi_dma_buf_setup(9F)					   Kernel Functions for Drivers 				     ddi_dma_buf_setup(9F)

NAME
ddi_dma_buf_setup - easier DMA setup for use with buffer structures SYNOPSIS
#include <sys/ddi.h> #include <sys/sunddi.h> int ddi_dma_buf_setup(dev_info_t *dip, struct buf *bp, uint_t flags, int (*waitfp) (caddr_t),, caddr_t arg, ddi_dma_lim_t *lim, ddi_dma_handle_t *handlep); INTERFACE LEVEL
This interface is obsolete. ddi_dma_buf_bind_handle(9F) should be used instead. PARAMETERS
dip A pointer to the device's dev_info structure. bp A pointer to a system buffer structure (see buf(9S)). flags Flags that go into a ddi_dma_req structure (see ddi_dma_req(9S)). waitfp The address of a function to call back later if resources aren't available now. The special function addresses DDI_DMA_SLEEP and DDI_DMA_DONTWAIT (see ddi_dma_req(9S)) are taken to mean, respectively, wait until resources are avail- able, or do not wait at all and do not schedule a callback. arg Argument to be passed to a callback function, if such a function is specified. lim A pointer to a DMA limits structure for this device (see ddi_dma_lim_sparc(9S) or ddi_dma_lim_x86(9S)). If this pointer is NULL, a default set of DMA limits is assumed. handlep Pointer to a DMA handle. See ddi_dma_setup(9F) for a discussion of handle. DESCRIPTION
ddi_dma_buf_setup() is an interface to ddi_dma_setup(9F). It uses its arguments to construct an appropriate ddi_dma_req structure and calls ddi_dma_setup() with it. RETURN VALUES
See ddi_dma_setup(9F) for the possible return values for this function. CONTEXT
ddi_dma_buf_setup() can be called from user or interrupt context, except when waitfp is set to DDI_DMA_SLEEP, in which case it can be called from user context only. ATTRIBUTES
See attributes(5) for a description of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Stability Level |Obsolete | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5), ddi_dma_addr_setup(9F), ddi_dma_free(9F), ddi_dma_htoc(9F), ddi_dma_setup(9F), ddi_dma_sync(9F), physio(9F), buf(9S), ddi_dma_lim_sparc(9S), ddi_dma_lim_x86(9S), ddi_dma_req(9S) Writing Device Drivers SunOS 5.10 27 Sep 2002 ddi_dma_buf_setup(9F)

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