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/* SPDX-License-Identifier: BSD-3-Clause */
/* Copyright (c) 2026 Open-IOV contributors */
/*
* GSP vGPU-IO Userspace Test
* Tests VFIO interface and driver functionality from userspace
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <linux/vfio.h>
#include <errno.h>
#include <stdint.h>
#include <inttypes.h>
#define GSP_VGPU_DEVICE "/dev/vfio/gsp-vgpu"
#define TEST_PASS 0
#define TEST_FAIL 1
static int test_count = 0;
static int pass_count = 0;
static int fail_count = 0;
#define TEST_ASSERT(cond, msg) \
do { \
test_count++; \
if (cond) { \
pass_count++; \
printf("PASS: %s\n", msg); \
} else { \
fail_count++; \
fprintf(stderr, "FAIL: %s\n", msg); \
} \
} while (0)
#define TEST_ASSERT_EQ(a, b, msg) \
TEST_ASSERT((a) == (b), msg " (expected " #b ", got " #a ")")
/* IOCTL definitions matching kernel driver */
#define GSP_IOCTL_MAGIC 'G'
#define GSP_IOCTL_CREATE_VF _IOW(GSP_IOCTL_MAGIC, 0x01, struct gsp_vf_config)
#define GSP_IOCTL_DESTROY_VF _IOW(GSP_IOCTL_MAGIC, 0x02, uint32_t)
#define GSP_IOCTL_ALLOC _IOWR(GSP_IOCTL_MAGIC, 0x10, struct gsp_alloc_args)
#define GSP_IOCTL_FREE _IOW(GSP_IOCTL_MAGIC, 0x11, struct gsp_free_args)
#define GSP_IOCTL_MAP _IOWR(GSP_IOCTL_MAGIC, 0x12, struct gsp_map_args)
#define GSP_IOCTL_UNMAP _IOW(GSP_IOCTL_MAGIC, 0x13, struct gsp_unmap_args)
#define GSP_IOCTL_PIN _IOWR(GSP_IOCTL_MAGIC, 0x14, struct gsp_pin_args)
#define GSP_IOCTL_UNPIN _IOW(GSP_IOCTL_MAGIC, 0x15, struct gsp_unpin_args)
#define GSP_IOCTL_BAR_TRAP _IOWR(GSP_IOCTL_MAGIC, 0x16, struct gsp_bar_trap_args)
#define GSP_IOCTL_MIGRATE _IOWR(GSP_IOCTL_MAGIC, 0x17, struct gsp_migrate_args)
#define GSP_IOCTL_WPR_PROTECT _IOWR(GSP_IOCTL_MAGIC, 0x18, struct gsp_wpr_args)
#define GSP_IOCTL_WPR_UNPROTECT _IOW(GSP_IOCTL_MAGIC, 0x19, struct gsp_wpr_args)
struct gsp_vf_config {
uint32_t id;
uint64_t bar1_offset;
uint64_t bar1_size;
uint64_t pt_base;
uint64_t pt_size;
uint64_t cmd_base;
uint64_t cmd_size;
uint32_t max_memory_mb;
uint32_t num_engines;
};
struct gsp_alloc_args {
uint32_t vf_id;
uint64_t size;
uint32_t type;
uint64_t alignment;
uint64_t va_hint;
uint32_t flags;
uint32_t pid;
uint64_t handle;
uint64_t va;
uint64_t actual_size;
};
struct gsp_free_args {
uint32_t vf_id;
uint64_t handle;
};
struct gsp_map_args {
uint32_t vf_id;
uint64_t handle;
uint64_t gpu_va;
uint64_t size;
uint32_t prot;
uint32_t flags;
uint64_t offset;
uint64_t mapped_va;
};
struct gsp_unmap_args {
uint32_t vf_id;
uint64_t handle;
uint64_t gpu_va;
uint64_t size;
};
struct gsp_pin_args {
uint32_t vf_id;
uint64_t handle;
uint64_t offset;
uint64_t size;
uint32_t flags;
uint64_t dma_addr;
uint32_t num_pages;
};
struct gsp_unpin_args {
uint32_t vf_id;
uint64_t handle;
uint64_t offset;
uint64_t size;
};
struct gsp_bar_trap_args {
uint32_t vf_id;
uint32_t bar_index;
uint32_t trap_type;
uint64_t offset;
uint64_t value;
uint32_t size;
uint64_t ret_value;
};
struct gsp_migrate_args {
uint32_t vf_id;
uint32_t phase;
uint32_t subcmd;
uint64_t src_vf;
uint64_t dst_vf;
uint64_t data_ptr;
uint64_t data_size;
uint32_t flags;
uint64_t token;
};
struct gsp_wpr_args {
uint32_t vf_id;
uint64_t base;
uint64_t size;
uint32_t flags;
};
int main(int argc, char *argv[])
{
int fd, ret;
uint32_t vf_id = 1;
printf("========================================\n");
printf("GSP vGPU-IO Userspace Test Suite\n");
printf("========================================\n");
/* Open device */
fd = open(GSP_VGPU_DEVICE, O_RDWR);
if (fd < 0) {
fprintf(stderr, "Failed to open %s: %s\n", GSP_VGPU_DEVICE, strerror(errno));
fprintf(stderr, "Make sure driver is loaded and VFIO device created\n");
return TEST_FAIL;
}
printf("Opened device: %s (fd=%d)\n", GSP_VGPU_DEVICE, fd);
/* Test 1: Create VF */
{
struct gsp_vf_config config = {
.id = vf_id,
.bar1_offset = 0x10000000,
.bar1_size = 0x100000,
.pt_base = 0x20000000,
.pt_size = 0x100000,
.cmd_base = 0x30000000,
.cmd_size = 0x10000,
.max_memory_mb = 1024,
.num_engines = 4,
};
ret = ioctl(fd, GSP_IOCTL_CREATE_VF, &config);
TEST_ASSERT(ret == 0, "Create VF");
if (ret == 0)
printf(" VF %u created successfully\n", vf_id);
}
/* Test 2: Allocate memory */
{
struct gsp_alloc_args args = {
.vf_id = vf_id,
.size = 0x10000, // 64KB
.type = 0, // VRAM
.alignment = 0x1000,
.va_hint = 0,
.flags = 0,
.pid = getpid(),
};
ret = ioctl(fd, GSP_IOCTL_ALLOC, &args);
TEST_ASSERT(ret == 0, "Allocate memory");
if (ret == 0) {
printf(" Allocated: handle=0x%" PRIx64 ", va=0x%" PRIx64 ", size=0x%" PRIx64 "\n",
args.handle, args.va, args.actual_size);
}
}
/* Test 3: Pin memory */
{
struct gsp_pin_args args = {
.vf_id = vf_id,
.handle = 0, // Would use handle from alloc
.offset = 0,
.size = 0x1000,
.flags = 3, // READ | WRITE
};
ret = ioctl(fd, GSP_IOCTL_PIN, &args);
TEST_ASSERT(ret == 0 || errno == ENODEV, "Pin memory (may fail without real allocation)");
}
/* Test 4: BAR Trap */
{
struct gsp_bar_trap_args args = {
.vf_id = vf_id,
.bar_index = 1,
.trap_type = 1, // WRITE
.offset = 0x1000,
.value = 0xDEADBEEF,
.size = 4,
};
ret = ioctl(fd, GSP_IOCTL_BAR_TRAP, &args);
TEST_ASSERT(ret == 0 || errno == ENODEV, "BAR trap (may fail without real HW)");
}
/* Test 5: WPR Protect */
{
struct gsp_wpr_args args = {
.vf_id = vf_id,
.base = 0x10000000,
.size = 0x10000,
.flags = 3, // WRITE | READ
};
ret = ioctl(fd, GSP_IOCTL_WPR_PROTECT, &args);
TEST_ASSERT(ret == 0 || errno == ENODEV, "WPR protect (may fail without real HW)");
}
/* Test 6: Migration */
{
struct gsp_migrate_args args = {
.vf_id = vf_id,
.phase = 1, // PREPARE
.subcmd = 3,
.src_vf = vf_id,
.dst_vf = 2,
.flags = 1, // LIVE
};
ret = ioctl(fd, GSP_IOCTL_MIGRATE, &args);
TEST_ASSERT(ret == 0 || errno == ENODEV, "Migration (may fail without real HW)");
}
/* Test 7: Destroy VF */
{
ret = ioctl(fd, GSP_IOCTL_DESTROY_VF, &vf_id);
TEST_ASSERT(ret == 0, "Destroy VF");
if (ret == 0)
printf(" VF %u destroyed successfully\n", vf_id);
}
close(fd);
printf("========================================\n");
printf("Userspace Test Results: %d total, %d passed, %d failed\n",
test_count, pass_count, fail_count);
printf("========================================\n");
return (fail_count > 0) ? TEST_FAIL : TEST_PASS;
}
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