#ifndef HALIDE_HALIDERUNTIMEHEXAGONHOST_H
#define HALIDE_HALIDERUNTIMEHEXAGONHOST_H
#include "HalideRuntime.h"
#ifdef __cplusplus
extern "C" {
#endif
/** \file
* Routines specific to the Halide Hexagon host-side runtime.
*/
typedef int halide_hexagon_handle_t;
extern const struct halide_device_interface_t *halide_hexagon_device_interface();
/** Check if the Hexagon runtime (libhalide_hexagon_host.so) is
* available. If it is not, pipelines using Hexagon will fail. */
extern bool halide_is_hexagon_available(void *user_context);
/** The device handle for Hexagon is simply a pointer and size, stored
* in the dev field of the buffer_t. If the buffer is allocated in a
* particular way (ion_alloc), the buffer will be shared with Hexagon
* (not copied). The device field of the buffer_t must be NULL when this
* routine is called. This call can fail due to running out of memory
* or being passed an invalid device handle. The device and host
* dirty bits are left unmodified. */
extern int halide_hexagon_wrap_device_handle(void *user_context, struct halide_buffer_t *buf,
void *ptr, uint64_t size);
/** Disconnect this halide_buffer_t from the device handle it was
* previously wrapped around. Should only be called for a
* halide_buffer_t that halide_hexagon_wrap_device_handle was
* previously called on. Frees any storage associated with the binding
* of the halide_buffer_t and the device handle, but does not free the
* device handle. The previously wrapped device handle is
* returned. The device field of the halide_buffer_t will be NULL on
* return. */
extern void *halide_hexagon_detach_device_handle(void *user_context, struct halide_buffer_t *buf);
/** Return the underlying device handle for a buffer_t. If there is
* no device memory (dev field is NULL), this returns 0. */
extern void *halide_hexagon_get_device_handle(void *user_context, struct halide_buffer_t *buf);
extern uint64_t halide_hexagon_get_device_size(void *user_context, struct halide_buffer_t *buf);
/** Power HVX on and off. Calling a Halide pipeline will do this
* automatically on each pipeline invocation; however, it costs a
* small but possibly significant amount of time for short running
* pipelines. To avoid this cost, HVX can be powered on prior to
* running several pipelines, and powered off afterwards. If HVX is
* powered on, subsequent calls to power HVX on will be cheap. */
// @{
extern int halide_hexagon_power_hvx_on(void *user_context);
extern int halide_hexagon_power_hvx_off(void *user_context);
extern void halide_hexagon_power_hvx_off_as_destructor(void *user_context, void * /* obj */);
// @}
/** Power modes for Hexagon. */
typedef enum halide_hexagon_power_mode_t {
halide_hexagon_power_low = 0,
halide_hexagon_power_nominal = 1,
halide_hexagon_power_turbo = 2,
halide_hexagon_power_default = 3, /// Resets power to its default state.
// These are deprecated.
halide_hvx_power_low = halide_hexagon_power_low,
halide_hvx_power_nominal = halide_hexagon_power_nominal,
halide_hvx_power_turbo = halide_hexagon_power_turbo,
halide_hvx_power_default = halide_hexagon_power_default,
} halide_hexagon_power_mode_t;
/** More detailed power settings to control Hexagon.
* @param set_mips - Set to TRUE to requst MIPS
* @param mipsPerThread - mips requested per thread, to establish a minimal clock frequency per HW thread
* @param mipsTotal - Total mips requested, to establish total number of MIPS required across all HW threads
* @param set_bus_bw - Set to TRUE to request bus_bw
* @param bwMeagabytesPerSec - Max bus BW requested (megabytes per second)
* @param busbwUsagePercentage - Percentage of time during which bwBytesPerSec BW is required from the bus (0..100)
* @param set_latency - Set to TRUE to set latency
* @param latency - maximum hardware wakeup latency in microseconds. The
* higher the value the deeper state of sleep
* that can be entered but the longer it may
* take to awaken. Only values > 0 are supported (1 microsecond is the smallest valid value)
*/
typedef struct {
bool set_mips;
unsigned int mipsPerThread;
unsigned int mipsTotal;
bool set_bus_bw;
unsigned int bwMegabytesPerSec;
unsigned short busbwUsagePercentage;
bool set_latency;
int latency;
} halide_hexagon_power_t;
// This is deprecated.
typedef halide_hexagon_power_t halide_hvx_power_perf_t;
/** Set a performance target for Hexagon. Hexagon applications can
* vote for the performance levels they want, which may or may not be
* respected by Hexagon. Applications should be careful not to leave
* Hexagon in a high power state for too long. These functions can
* significantly increase standby power consumption. Use
* halide_hexagon_power_default to reset performance to the default
* power state. */
// @{
extern int halide_hexagon_set_performance_mode(void *user_context, halide_hexagon_power_mode_t mode);
extern int halide_hexagon_set_performance(void *user_context, halide_hexagon_power_t *perf);
// @}
/** These are forward declared here to allow clients to override the
* Halide Hexagon runtime. Do not call them. */
// @{
extern int halide_hexagon_initialize_kernels(void *user_context,
void **module_ptr,
const uint8_t *code, uint64_t code_size);
extern int halide_hexagon_run(void *user_context,
void *module_ptr,
const char *name,
halide_hexagon_handle_t *function,
uint64_t arg_sizes[],
void *args[],
int arg_flags[]);
extern int halide_hexagon_device_release(void* user_context);
// @}
#ifdef __cplusplus
} // End extern "C"
#endif
#endif // HALIDE_HALIDERUNTIMEHEXAGONHOST_H