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Name

Synopsis

int ddi_regs_map_setup(dev_info_t *dip, uint_t rnumber, caddr_t *addrp, offset_t offset, offset_t len, ddi_device_acc_attr_t *accattrp, ddi_acc_handle_t *handlep);

Availability

Arguments

dip

Pointer to the device’s dev_info structure.

rnumber

Index number to the register address space set.

addrp

Pointer to the mapping address base.

offset

Offset into the register address space.

len

Length to be mapped.

accattrp

Pointer to a device access attribute structure of this device (see ddi_device_acc_attr(9S) ).

handlep

Pointer to a data access handle.

Interface Level

Description

offset specifies the starting location within the register space and len indicates the size of the area to be mapped. If len is non-zero, it overrides the length given in the register set description. If both len and offset are 0, the entire space is mapped. The base of the mapped register space is returned in addrp.

The device access attributes are specified in the location pointed by the accattrp argument (see ddi_device_acc_attr(9S) for details).

The data access handle is returned in handlep. handlep is opaque - drivers should not attempt to interpret its value. The handle is used by the system to encode information for subsequent data access function calls to maintain a consistent view between the host and the device.

Return Values

DDI_SUCCESS

Successfully set up the mapping for data access.

DDI_FAILURE

Invalid register number rnumber, offset offset, or length len.

DDI_REGS_ACC_CONFLICT

Cannot enable the register mapping due to access conflicts with other enabled mappings.

Context

See Also

Table of Contents

• Name
• Synopsis
• Availability
• Arguments
• Interface Level
• Description
• Return Values
• Context
• See Also