/*
 * GSP Emulation Engine for Host-Side GSP Emulation
 * Replaces guest-side GSP communication with host kernel emulation
 */

#ifndef _GSP_EMULATION_H_
#define _GSP_EMULATION_H_

#include <linux/types.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/list.h>
#include <linux/kthread.h>
#include <linux/eventfd.h>

#include "nvidia-vgpu-vfio.h"
#include "gsp_rpc_client.h"
#include "bar_emulation.h"
#include "irq.h"
#include "memory.h"

/* ============================================================
 * GSP Emulation Context
 * ============================================================ */

struct gsp_emu_context {
    struct nv_vgpu_device *vgpu;
    struct task_struct *thread;
    void __iomem *bar0_vaddr;
    void __iomem *doorbell_reg;
    void __iomem *shared_mem;
    struct gsp_client *rpc_client;
    spinlock_t lock;
    bool running;
    bool initialized;

    /* Shared memory for RPC communication (4KB at BAR0+0x1000) */
    void *shared_mem_virt;
    dma_addr_t shared_mem_dma;
    size_t shared_mem_size;

    /* Statistics */
    u64 processed_rpcs;
    u64 failed_rpcs;
    u64 total_latency_ns;

    /* MSI-X injection */
    struct eventfd_ctx *msix_trigger[NV_VGPU_MAX_IRQS];
};

/* ============================================================
 * Public API
 * ============================================================ */

int gsp_emu_init(struct nv_vgpu_device *vgpu);
void gsp_emu_cleanup(struct nv_vgpu_device *vgpu);
int gsp_emu_process_rpc(struct gsp_emu_context *ctx);
void gsp_emu_inject_completion_interrupt(struct gsp_emu_context *ctx, u32 seq_id);

/* ============================================================
 * Debug/Statistics
 * ============================================================ */

void gsp_emu_get_stats(struct gsp_emu_context *ctx,
                       u64 *processed, u64 *failed, u64 *total_latency_ns);

#endif /* _GSP_EMULATION_H_ */