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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _GSP_SEMA_SERVICE_H_
#define _GSP_SEMA_SERVICE_H_
/*
* Emulated-GPU progress service: discovers the guest's GPU-VA -> guest-PA
* mapping and applies the copy-engine semaphore releases found in mapped
* pages, so that the guest's UVM progress waits complete.
*
* See gsp_sema_service.c for the full description.
*/
/*
* A guest channel, registered when the driver allocates it. The service uses
* the channel's GPFIFO + USERD to notice submissions as they happen (instead
* of discovering the pushed work by scanning guest RAM) and to run the pushed
* work promptly.
*
* All addresses are guest-physical except gpfifo_va, which is the GPU VA of
* the channel's GPFIFO ring (translated through the discovered VA->PA map).
*/
struct sema_channel_desc {
u32 h_object;
u32 engine_type;
u64 gpfifo_va;
u32 gpfifo_entries;
u64 userd_pa; /* NvA06FControl: GPGet @0x88, GPPut @0x8c */
u32 userd_as; /* NV_ADDR_SYSMEM(1) / NV_ADDR_FBMEM(2) */
u64 instance_pa;
u64 notifier_pa;
};
void gsp_sema_service_channel_add(const struct sema_channel_desc *desc);
void gsp_sema_service_channel_del(u32 h_object);
int gsp_sema_service_start(void);
void gsp_sema_service_stop(void);
int gsp_sema_service_probe(u64 gpu_va, u32 count);
#endif /* _GSP_SEMA_SERVICE_H_ */
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