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/*
* GSP vGPU-IO Example Application
* Demonstrates basic VF creation, memory allocation, and BAR configuration
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <libvgpu.h>
static volatile bool running = true;
static void signal_handler(int sig)
{
(void)sig;
running = false;
}
int main(int argc, char *argv[])
{
const char *device_path = "/dev/gsp-vgpu";
vgpu_device_t device = NULL;
vgpu_vf_t vf = NULL;
vgpu_handle_t handle = 0;
uint64_t va = 0;
uint64_t dma_addr = 0;
int ret;
if (argc > 1)
device_path = argv[1];
printf("GSP vGPU-IO Example Application\n");
printf("Device: %s\n", device_path);
signal(SIGINT, signal_handler);
signal(SIGTERM, signal_handler);
/* Open device */
ret = vgpu_open(device_path, &device);
if (ret != VGPU_OK) {
fprintf(stderr, "Failed to open device: %s\n", vgpu_strerror(ret));
return 1;
}
printf("Device opened successfully\n");
/* Get device info */
char info[256];
ret = vgpu_get_info(device, info, sizeof(info));
if (ret == VGPU_OK)
printf("Device info: %s\n", info);
/* Create VF */
vgpu_vf_config_t config = {
.id = 1,
.bar1_offset = 0x10000000,
.bar1_size = 0x40000,
.pt_base = 0,
.pt_size = 0,
.cmd_base = 0,
.cmd_size = 0,
.max_memory_mb = 1024,
.num_engines = 4,
};
ret = vgpu_vf_create(device, &config, &vf);
if (ret != VGPU_OK) {
fprintf(stderr, "Failed to create VF: %s\n", vgpu_strerror(ret));
vgpu_close(device);
return 1;
}
printf("VF %u created\n", config.id);
/* Configure BAR1 */
ret = vgpu_bar_config(vf, 0x10000000, 0x40000);
if (ret != VGPU_OK) {
fprintf(stderr, "Failed to configure BAR: %s\n", vgpu_strerror(ret));
vgpu_vf_destroy(vf);
vgpu_close(device);
return 1;
}
printf("BAR1 configured\n");
/* Allocate VRAM */
const uint64_t alloc_size = 1024 * 1024; /* 1 MB */
ret = vgpu_mem_alloc(vf, alloc_size, VGPU_MEM_VRAM, 0x1000, 0,
0, &handle, &va);
if (ret != VGPU_OK) {
fprintf(stderr, "Failed to allocate memory: %s\n", vgpu_strerror(ret));
vgpu_vf_destroy(vf);
vgpu_close(device);
return 1;
}
printf("Allocated %llu bytes at VA 0x%llx (handle 0x%llx)\n",
(unsigned long long)alloc_size, (unsigned long long)va,
(unsigned long long)handle);
/* Map memory */
uint64_t mapped_va = 0;
ret = vgpu_mem_map(vf, handle, va, alloc_size, 0x3, 0, 0, &mapped_va);
if (ret != VGPU_OK) {
fprintf(stderr, "Failed to map memory: %s\n", vgpu_strerror(ret));
vgpu_mem_free(vf, handle);
vgpu_vf_destroy(vf);
vgpu_close(device);
return 1;
}
printf("Mapped at 0x%llx\n", (unsigned long long)mapped_va);
/* Pin for DMA */
ret = vgpu_mem_pin(vf, handle, 0, alloc_size, VGPU_PIN_READ | VGPU_PIN_WRITE, &dma_addr);
if (ret != VGPU_OK) {
fprintf(stderr, "Failed to pin memory: %s\n", vgpu_strerror(ret));
} else {
printf("Pinned for DMA at 0x%llx\n", (unsigned long long)dma_addr);
}
/* Protect with WPR (write) */
ret = vgpu_wpr_protect_write(vf, va, alloc_size);
if (ret != VGPU_OK) {
fprintf(stderr, "Failed to protect with WPR: %s\n", vgpu_strerror(ret));
} else {
printf("WPR write protection enabled\n");
}
/* Set WPR timeout */
ret = vgpu_wpr_set_timeout(vf, 1000000000ULL); /* 1 second */
if (ret != VGPU_OK) {
fprintf(stderr, "Failed to set WPR timeout: %s\n", vgpu_strerror(ret));
}
/* Schedule work */
ret = vgpu_schedule(vf, handle, 0, 0, 0, 0);
if (ret != VGPU_OK) {
fprintf(stderr, "Failed to schedule: %s\n", vgpu_strerror(ret));
} else {
printf("Work scheduled\n");
}
/* Run loop */
printf("\nRunning... Press Ctrl+C to exit\n");
while (running) {
ret = vgpu_process_events(device, 1000);
if (ret != VGPU_OK && ret != VGPU_ERR_TIMEOUT) {
fprintf(stderr, "Event processing error: %s\n", vgpu_strerror(ret));
}
}
printf("\nShutting down...\n");
/* Unprotect WPR */
vgpu_wpr_unprotect(vf, va);
/* Unpin */
if (dma_addr)
vgpu_mem_unpin(vf, handle, 0, alloc_size);
/* Unmap */
vgpu_mem_unmap(vf, handle, va, alloc_size);
/* Free memory */
vgpu_mem_free(vf, handle);
/* Destroy VF */
vgpu_vf_destroy(vf);
/* Close device */
vgpu_close(device);
printf("Done\n");
return 0;
}
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