105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <pci/pci.h>
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#define PRINT_ERROR \
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do { \
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fprintf(stderr, "Error at line %d, file %s (%d) [%s]\n", \
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__LINE__, __FILE__, errno, strerror(errno)); exit(1); \
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} while(0)
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struct device
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{
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uint32_t bar0;
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uint32_t offset;
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uint16_t dev_id;
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const char *arch;
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const char *name;
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};
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static struct device devices[] = {
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{ .bar0 = 0xEC000000, .offset = 0x0000E2A8, .dev_id = 0x2684, .arch = "AD102", .name = "RTX 4090" },
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{ .bar0 = 0xFB000000, .offset = 0x0000E2A8, .dev_id = 0x2204, .arch = "GA102", .name = "RTX 3090" },
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{ .bar0 = 0xFB000000, .offset = 0x0000EE50, .dev_id = 0x2484, .arch = "GA104", .name = "RTX 3070" },
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{ .bar0 = 0xFB000000, .offset = 0x0000EE50, .dev_id = 0x2488, .arch = "GA104", .name = "RTX 3070-LHR" },
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};
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struct device * pci_detect_dev()
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{
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struct pci_access *pacc = NULL;
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struct pci_dev *dev = NULL;
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struct device *device = NULL;
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pacc = pci_alloc();
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pci_init(pacc);
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pci_scan_bus(pacc);
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for (dev = pacc->devices; dev; dev = dev->next) {
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pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_CLASS);
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for (uint32_t i = 0; i < 3; i++) {
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if (dev->device_id == devices[i].dev_id) {
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device = &devices[i];
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}
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}
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}
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pci_cleanup(pacc);
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return device;
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}
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int main(int argc, char **argv)
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{
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int fd;
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int map_size = 4096UL;
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void *map_base, *virt_addr;
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uint32_t read_result, base_offset, temp;
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uint32_t offset;
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struct device *device = NULL;
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char *MEM_RES = "\x2f\x64\x65\x76\x2f\x6d\x65\x6d";
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device = pci_detect_dev();
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offset = device->bar0 + device->offset;
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if (device == NULL) {
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printf("No compatible devices device. \n");
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exit(-1);
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}
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printf("Device: %s (%s / 0x%04x) \n", device->name, device->arch, device->dev_id);
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while (1) {
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if ((fd = open(MEM_RES, O_RDWR | O_SYNC)) == -1) {
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printf("Can't read memory. Are you r00t?\n");
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exit(-1);
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}
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base_offset = offset & ~(sysconf(_SC_PAGE_SIZE)-1);
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map_base = mmap(0, map_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, base_offset);
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if(map_base == (void *) -1)
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PRINT_ERROR;
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virt_addr = map_base + offset - base_offset;
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read_result = *((uint32_t *) virt_addr);
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temp = (read_result & 0x00000fff) / 0x20;
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printf("\rGDDR6X VRAM Temp: %d°c", temp);
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fflush(stdout);
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if (munmap(map_base, map_size) == -1) {
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printf("Can't unmap memory!\n");
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exit(-1);
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}
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close(fd);
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sleep(1);
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}
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return 0;
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}
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