A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-23 04:59:05 -04:00
Code Issues Projects Releases Packages Wiki Activity

Merge "soc: qcom: mem-buf: Add support for consumers to import dma-bufs"

Browse source
This commit is contained in:
qctecmdr 2020-06-15 06:15:38 -07:00 • committed by Gerrit - the friendly Code Review server
commit da16bbb59f
12 changed files with 1253 additions and 59 deletions
Download patch file Download diff file Expand all files Collapse all files

74
include/uapi/linux/mem-buf.h
View file

@ -56,13 +56,13 @@ struct mem_buf_ion_data {
};
/**
* struct mem_buf_alloc_ioctl_arg: An request to allocate memory from another
* struct mem_buf_alloc_ioctl_arg: A request to allocate memory from another
* VM to other VMs.
* @size: The size of the allocation.
* @nr_acl_entries: The number of ACL entries in @acl_list.
* @acl_list: An array of structures, where each structure specifies a VMID
* and the access permissions that the VMID will have to the memory to be
* allocated.
* @nr_acl_entries: The number of ACL entries in @acl_list.
* @src_mem_type: The type of memory that the source VM should allocate from.
* This should be one of the mem_buf_mem_type enum values.
* @src_data: A pointer to data that the source VM should interpret when
@ -70,25 +70,25 @@ struct mem_buf_ion_data {
* @dst_mem_type: The type of memory that the destination VM should treat the
* incoming allocation from the source VM as. This should be one of the
* mem_buf_mem_type enum values.
* @dst_data: A pointer to data that the destination VM should interpret when
* adding the memory to the current VM.
* @mem_buf_fd: A file descriptor representing the memory that was allocated
* from the source VM and added to the current VM. Calling close() on this file
* descriptor will deallocate the memory from the current VM, and return it
* to the source VM.
* * @dst_data: A pointer to data that the destination VM should interpret when
* adding the memory to the current VM.
*
* All reserved fields must be zeroed out by the caller prior to invoking the
* allocation IOCTL command with this argument.
*/
struct mem_buf_alloc_ioctl_arg {
__u64 size;
__u32 nr_acl_entries;
__u64 acl_list;
__u32 nr_acl_entries;
__u32 src_mem_type;
__u64 src_data;
__u32 dst_mem_type;
__u64 dst_data;
__u32 mem_buf_fd;
__u64 dst_data;
__u64 reserved0;
__u64 reserved1;
__u64 reserved2;
@ -97,4 +97,66 @@ struct mem_buf_alloc_ioctl_arg {
#define MEM_BUF_IOC_ALLOC _IOWR(MEM_BUF_IOC_MAGIC, 0,\
struct mem_buf_alloc_ioctl_arg)
/**
* struct mem_buf_export_ioctl_arg: An request to allocate memory from another
* VM to other VMs.
* @dma_buf_fd: The fd of the dma-buf that will be exported to another VM.
* @nr_acl_entries: The number of ACL entries in @acl_list.
* @acl_list: An array of structures, where each structure specifies a VMID
* and the access permissions that the VMID will have to the memory to be
* exported.
* @export_fd: An fd that corresponds to the buffer that was exported. This fd
* must be kept open until it is no longer required to export the memory to
* another VM.
* @memparcel_hdl: The handle associated with the memparcel that was created by
* granting access to the dma-buf for the VMIDs specified in @acl_list.
*
* Note: The buffer must not be mmap'ed by any process prior to invoking this
* IOCTL. The buffer must also be a cached buffer from a non-secure ION heap.
*
* All reserved fields must be zeroed out by the caller prior to invoking the
* export IOCTL command with this argument.
*/
struct mem_buf_export_ioctl_arg {
__u32 dma_buf_fd;
__u32 nr_acl_entries;
__u64 acl_list;
__u32 export_fd;
__u32 memparcel_hdl;
__u64 reserved0;
__u64 reserved1;
__u64 reserved2;
};
#define MEM_BUF_IOC_EXPORT _IOWR(MEM_BUF_IOC_MAGIC, 1,\
struct mem_buf_export_ioctl_arg)
/**
* struct mem_buf_import_ioctl_arg: A request to import memory from another
* VM as a dma-buf
* @memparcel_hdl: The handle that corresponds to the memparcel we are
* importing.
* @nr_acl_entries: The number of ACL entries in @acl_list.
* @acl_list: An array of structures, where each structure specifies a VMID
* and the access permissions that the VMID should have for the memparcel.
* @dma_buf_import_fd: A dma-buf file descriptor that the client can use to
* access the buffer. This fd must be closed to release the memory.
*
* All reserved fields must be zeroed out by the caller prior to invoking the
* import IOCTL command with this argument.
*/
struct mem_buf_import_ioctl_arg {
__u32 memparcel_hdl;
__u32 nr_acl_entries;
__u64 acl_list;
__u32 dma_buf_import_fd;
__u32 reserved0;
__u64 reserved1;
__u64 reserved2;
__u64 reserved3;
};
#define MEM_BUF_IOC_IMPORT _IOWR(MEM_BUF_IOC_MAGIC, 2,\
struct mem_buf_import_ioctl_arg)
#endif /* _UAPI_LINUX_MEM_BUF_H */