diff options
Diffstat (limited to 'gxp.h')
| -rw-r--r-- | gxp.h | 70 |
1 files changed, 63 insertions, 7 deletions
@@ -37,6 +37,8 @@ * - GXP_MAP_BUFFER * - GXP_UNMAP_BUFFER * - GXP_SYNC_BUFFER + * - GXP_MAP_DMABUF + * - GXP_UNMAP_DMABUF */ struct gxp_map_ioctl { @@ -337,12 +339,12 @@ struct gxp_etm_get_trace_info_ioctl { * that is used for decoding the trace. */ __u64 trace_header_addr; - /* - * Input: + /* + * Input: * Trace data user space address to contain Trace RAM data. * Note: trace_data field will be empty if type == 0 */ - __u64 trace_data_addr; + __u64 trace_data_addr; }; /* Retrieves trace header and/or trace data for decoding purposes. */ @@ -489,8 +491,9 @@ struct gxp_acquire_wakelock_ioctl { __u32 components_to_wake; /* * Minimum power state to operate the entire DSP subsystem at until - * the wakelock is released. One of the GXP_POWER_STATE_* defines - * from above. + * the BLOCK wakelock is released. One of the GXP_POWER_STATE_* defines + * from above. Note that the requested power state will not be cleared + * if only the VIRTUAL_DEVICE wakelock is released. * * `GXP_POWER_STATE_OFF` is not a valid value when acquiring a * wakelock. @@ -498,8 +501,9 @@ struct gxp_acquire_wakelock_ioctl { __u32 gxp_power_state; /* * Memory interface power state to request from the system so long as - * the wakelock is held. One of the MEMORY_POWER_STATE* defines from - * above. + * the BLOCK wakelock is held. One of the MEMORY_POWER_STATE* defines + * from above. The requested memory power state will not be cleared if + * only the VIRTUAL_DEVICE wakelock is released. * * If `MEMORY_POWER_STATE_UNDEFINED` is passed, no request to change * the memory interface power state will be made. @@ -556,4 +560,56 @@ struct gxp_acquire_wakelock_ioctl { */ #define GXP_RELEASE_WAKE_LOCK _IOW(GXP_IOCTL_BASE, 19, __u32) +struct gxp_map_dmabuf_ioctl { + /* + * Bitfield indicating which virtual cores to map the dma-buf for. + * To map for virtual core X, set bit X in this field, i.e. `1 << X`. + * + * This field is not used by the unmap dma-buf IOCTL, which always + * unmaps a dma-buf for all cores it had been mapped for. + */ + __u16 virtual_core_list; + __s32 dmabuf_fd; /* File descriptor of the dma-buf to map. */ + /* + * Flags indicating mapping attribute requests from the runtime. + * Set RESERVED bits to 0 to ensure backwards compatibility. + * + * Bitfields: + * [1:0] - DMA_DIRECTION: + * 00 = DMA_BIDIRECTIONAL (host/device can write buffer) + * 01 = DMA_TO_DEVICE (host can write buffer) + * 10 = DMA_FROM_DEVICE (device can write buffer) + * Note: DMA_DIRECTION is the direction in which data moves + * from the host's perspective. + * [31:2] - RESERVED + */ + __u32 flags; + /* + * Device address the dmabuf is mapped to. + * - GXP_MAP_DMABUF uses this field to return the address the dma-buf + * can be accessed from by the device. + * - GXP_UNMAP_DMABUF expects this field to contain the value from the + * mapping call, and uses it to determine which dma-buf to unmap. + */ + __u64 device_address; +}; + +/* + * Map host buffer via its dma-buf FD. + * + * The client must hold a VIRTUAL_DEVICE wakelock. + */ +#define GXP_MAP_DMABUF _IOWR(GXP_IOCTL_BASE, 20, struct gxp_map_dmabuf_ioctl) + +/* + * Un-map host buffer previously mapped by GXP_MAP_DMABUF. + * + * Only the @device_address field is used. Other fields are fetched from the + * kernel's internal records. It is recommended to use the argument that was + * passed in GXP_MAP_DMABUF to un-map the dma-buf. + * + * The client must hold a VIRTUAL_DEVICE wakelock. + */ +#define GXP_UNMAP_DMABUF _IOW(GXP_IOCTL_BASE, 21, struct gxp_map_dmabuf_ioctl) + #endif /* __GXP_H__ */ |