DDI_IO_REP_GET8(9F) Kernel Functions for Drivers DDI_IO_REP_GET8(9F)


NAME


ddi_io_rep_get8, ddi_io_rep_get16, ddi_io_rep_get32
- read multiple data from the mapped device register in I/O space

SYNOPSIS


#include <sys/ddi.h>
#include <sys/sunddi.h>


void ddi_io_rep_get8(ddi_acc_handle_t handle, uint8_t *host_addr,
uint8_t *dev_addr, size_t repcount);


void ddi_io_rep_get16(ddi_acc_handle_t handle, uint16_t *host_addr,
uint16_t *dev_addr, size_t repcount);


void ddi_io_rep_get32(ddi_acc_handle_t handle, uint32_t *host_addr,
uint32_t *dev_addr, size_t repcount);


INTERFACE LEVEL


illumos DDI specific (illumos DDI). The ddi_io_rep_get8(),
ddi_io_rep_get16(), ddi_io_rep_get32(), ddi_io_rep_getb(),
ddi_io_rep_getl(), and ddi_io_rep_getw() functions are obsolete. The
ddi_rep_get8(9F) function replaces ddi_io_rep_get8(). The
ddi_rep_get16(9F) function replaces ddi_io_rep_get16(). The
ddi_rep_get32(9F) function replaces ddi_io_rep_get32().

PARAMETERS


handle
The data access handle returned from setup calls, such as
ddi_regs_map_setup(9F).


host_addr
Base host address.


dev_addr
Base device address.


repcount
Number of data accesses to perform.


DESCRIPTION


These routines generate multiple reads from the device address, dev_addr,
in I/O space. repcount data is copied from the device address, dev_addr,
to the host address, host_addr. For each input datum, the
ddi_io_rep_get8(), ddi_io_rep_get16(), and ddi_io_rep_get32() functions
read 8 bits, 16 bits, and 32 bits of data, respectively, from the device
address. host_addr must be aligned to the datum boundary described by the
function.


Each individual datum will automatically be translated to maintain a
consistent view between the host and the device based on the encoded
information in the data access handle. The translation may involve byte-
swapping if the host and the device have incompatible endian
characteristics.

CONTEXT


These functions can be called from user, kernel, or interrupt context.

ATTRIBUTES


See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Obsolete |
+--------------------+-----------------+

SEE ALSO


isa(5), ddi_io_get8(9F), ddi_io_put8(9F), ddi_io_rep_put8(9F),
ddi_regs_map_free(9F), ddi_regs_map_setup(9F), ddi_rep_get16(9F),
ddi_rep_get32(9F), ddi_rep_get8(9F), ddi_device_acc_attr(9S)


illumos August 29, 2021 DDI_IO_REP_GET8(9F)