Name | Synopsis | Interface Level | Parameters | Description | Return Values | Context | See Also
#include <sys/ddi.h> #include <sys/sunddi.h> int ddi_device_copy(ddi_acc_handle_t src_handle, caddr_t src_addr, ssize_t src_advcnt, ddi_acc_handle_t dest_handle, caddr_t dest_addr, ssize_t dest_advcnt, size_t bytecount, uint_t dev_datasz);
Solaris DDI specific (Solaris DDI).
The data access handle of the source device.
Base data source address.
Number of dev_datasz units to advance on every access.
The data access handle of the destination device.
Base data destination address.
Number of dev_datasz units to advance on every access.
Number of bytes to transfer.
The size of each data word. Possible values are defined as:
1 byte data size
2 bytes data size
4 bytes data size
8 bytes data size
ddi_device_copy() copies bytecount bytes from the source address, src_addr, to the destination address, dest_addr. The attributes encoded in the access handles, src_handle and dest_handle, govern how data is actually copied from the source to the destination. Only matching data sizes between the source and destination are supported.
Data will automatically be translated to maintain a consistent view between the source and the destination. The translation may involve byte-swapping if the source and the destination devices have incompatible endian characteristics.
The src_advcnt and dest_advcnt arguments specifies the number of dev_datasz units to advance with each access to the device addresses. A value of 0 will use the same source and destination device address on every access. A positive value increments the corresponding device address by certain number of data size units in the next access. On the other hand, a negative value decrements the device address.
The dev_datasz argument determines the size of the data word on each access. The data size must be the same between the source and destination.
ddi_device_copy() returns:
Successfully transferred the data.
The byte count is not a multiple dev_datasz.
ddi_device_copy() can be called from user, kernel, or interrupt context.
Name | Synopsis | Interface Level | Parameters | Description | Return Values | Context | See Also