#include <remoteproc.h>

Data Fields
u32	type

u32	da

u32	pa

u32	len

u32	flags

u32	reserved

u8	name [32]

Detailed Description

struct fw_rsc_devmem - iommu mapping request

This resource entry requests the host to iommu map a physically contiguous memory region. This is needed in case the remote processor requires access to certain memory-based peripherals; never use it to access regular memory.

This is obviously only needed if the remote processor is accessing memory via an iommu.

Note: at this point we just "trust" those devmem entries to contain valid physical addresses, but this isn't safe and will be changed: eventually we want remoteproc implementations to provide us ranges of physical addresses the firmware is allowed to request, and not allow firmwares to request access to physical addresses that are outside those ranges.

Field Documentation

◆ da

u32 fw_rsc_devmem::da

device address

should specify the required device address,

◆ flags

u32 fw_rsc_devmem::flags

iommu protection flags

is the IOMMU protection flags. As always,

◆ len

u32 fw_rsc_devmem::len

length (in bytes) should specify the size of the mapping and

◆ name

u8 fw_rsc_devmem::name[32]

human-readable name of the requested region to be mapped

may (optionally) contain a human readable name of this mapping (mainly for debugging purposes).

◆ pa

u32 fw_rsc_devmem::pa

physical address

should specify the physical address we want to map.

◆ reserved

u32 fw_rsc_devmem::reserved

reserved (must be zero)

◆ type

u32 fw_rsc_devmem::type

resource type

See also: fw_rsc_hdr

The documentation for this struct was generated from the following file:

driver/include/remoteproc.h

Data Fields