moosecrap/evga-icx
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Reuse memory mappings

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moosecrap 2025-02-21 11:26:17 -08:00
parent b7d22ed9ac
commit 20e2683110
2 changed files with 47 additions and 46 deletions
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2
evga-card.h
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@ -92,6 +92,8 @@ struct card_info {
int product_id; /* EVGA internal product ID, as reported by the iCX3 controller */
unsigned int bar0; /* Address of the card's PCI base address register */
void *nvml_device; /* Pointer to nvmlDevice_t for use in NVML calls */
void *vram_addr; /* Memory mapping for GDDR6 temps */
void *hotspot_addr; /* Memory mapping for hotspot temperature */
};
struct gpu_pci_info {

91
gddr6.c
View File

@ -36,70 +36,69 @@ void init_gddr6(struct card_info *card)
card->bar0 = (pci_dev->base_addr[0] & 0xFFFFFFFF);
pci_cleanup(pacc);
/* Open our memory mappings */
card->vram_addr = NULL;
card->hotspot_addr = NULL;
int fd;
if ((fd = open("/dev/mem", O_RDWR | O_SYNC)) == -1)
{
printf("Can't read memory for VRAM and Hotspot temperatures. If you are root, enable kernel parameter iomem=relaxed\n");
return;
}
unsigned int phys_addr, base_offset;
void *map_base;
for (int i = 0; i < sizeof(device_offset_info) / sizeof(struct device_offset); i++) {
if (card->pci_device_id == device_offset_info[i].device_id){
/* Map for VRAM */
phys_addr = (card->bar0 + device_offset_info[i].vram_offset);
base_offset = phys_addr & ~(PG_SZ-1);
map_base = mmap(0, PG_SZ, PROT_READ, MAP_SHARED, fd, base_offset);
if(map_base == (void *) -1)
printf("Can't map memory for VRAM temperature. If you are root, enable kernel parameter iomem=relaxed\n");
else
card->vram_addr = (void *) map_base + (phys_addr - base_offset);
/* Map for hotspot */
phys_addr = (card->bar0 + device_offset_info[i].hotspot_offset);
base_offset = phys_addr & ~(PG_SZ-1);
map_base = mmap(0, PG_SZ, PROT_READ, MAP_SHARED, fd, base_offset);
if(map_base == (void *) -1)
printf("Can't map memory for Hotspot temperature. If you are root, enable kernel parameter iomem=relaxed\n");
else
card->hotspot_addr = (void *) map_base + (phys_addr - base_offset);
}
}
close(fd);
}
float get_vram_temp(struct card_info *card)
{
int fd;
float temp = 0.0;
if ((fd = open("/dev/mem", O_RDWR | O_SYNC)) == -1)
{
printf("Can't read memory. If you are root, enable kernel parameter iomem=relaxed\n");
return 0;
}
if(card->vram_addr == NULL)
return 0.0;
for (int i = 0; i < sizeof(device_offset_info) / sizeof(struct device_offset); i++) {
if (card->pci_device_id == device_offset_info[i].device_id){
unsigned int phys_addr = (card->bar0 + device_offset_info[i].vram_offset);
unsigned int base_offset = phys_addr & ~(PG_SZ-1);
void *map_base = mmap(0, PG_SZ, PROT_READ, MAP_SHARED, fd, base_offset);
if(map_base == (void *) -1)
{
if (fd != -1)
close(fd);
printf("Can't read memory for VRAM temperature. If you are root, enable kernel parameter iomem=relaxed\n");
}
void *virt_addr = (char *) map_base + (phys_addr - base_offset);
int read_result = *((unsigned int *) virt_addr);
int read_result = *((unsigned int *) card->vram_addr);
temp = ((read_result & 0x00000fff) / 0x20);
munmap(map_base, PG_SZ);
}
}
close(fd);
return temp;
}
float get_hotspot_temp(struct card_info *card)
{
int fd;
float temp = 0.0;
if ((fd = open("/dev/mem", O_RDWR | O_SYNC)) == -1)
{
printf("Can't read memory. If you are root, enable kernel parameter iomem=relaxed\n");
return 0;
}
if(card->hotspot_addr == NULL)
return 0.0;
for (int i = 0; i < sizeof(device_offset_info) / sizeof(struct device_offset); i++) {
if (card->pci_device_id == device_offset_info[i].device_id){
unsigned int phys_addr = (card->bar0 + device_offset_info[i].hotspot_offset);
unsigned int base_offset = phys_addr & ~(PG_SZ-1);
void *map_base = mmap(0, PG_SZ, PROT_READ, MAP_SHARED, fd, base_offset);
if(map_base == (void *) -1)
{
if (fd != -1)
close(fd);
printf("Can't read memory for hotspot. If you are root, enable kernel parameter iomem=relaxed\n");
}
void *virt_addr = (char *) map_base + (phys_addr - base_offset);
int read_result = *((unsigned int *) virt_addr);
int read_result = *((unsigned int *) card->hotspot_addr);
temp = (read_result >> 8) & 0xff;
munmap(map_base, PG_SZ);
}
}
close(fd);
return temp;
}