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Simple PCIe FMC carrier SPEC - Software
Commit 1d8bb157 authored by garcialasheras's avatar garcialasheras Committed by Federico Vaga
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tools: Tools detached from kernel: no modules required

parent cfb9e36f
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Showing with 64 additions and 5 deletions
tools/speclib.c
View file @ 1d8bb157
......@@ -27,6 +27,54 @@ struct spec_private {
uint32_t vuart_base;
};
/*
* Check if the PCI device at bus/def_fn is a SPEC board.
* Return 1 if the device is a SPEC and 0 if it is not.
* If there is an error accessing the files, return -1
*/
static int spec_check_id(int bus, int dev)
{
unsigned int vendor, device;
char buf[128];
FILE *f;
// check device
snprintf(buf, sizeof buf,
"/sys/bus/pci/devices/0000:%02x:%02x.0/device",
bus, dev);
f=fopen(buf,"r");
if (f==NULL){
fprintf(stderr,"error accessing to file\n");
return -1;
}
fscanf(f, "%x", &device);
fclose(f);
// check vendor
snprintf(buf, sizeof buf,
"/sys/bus/pci/devices/0000:%02x:%02x.0/vendor",
bus, dev);
f=fopen(buf,"r");
if (f==NULL){
fprintf(stderr,"error accessing to file\n");
return -1;
}
fscanf(f, "%x", &vendor);
fclose(f);
if (device== PCI_DEVICE_ID_SPEC && vendor== PCI_VENDOR_ID_CERN)
return 1;
if (device== PCI_DEVICE_ID_GN4124 && vendor== PCI_VENDOR_ID_GENNUM)
return 1;
return 0;
}
/*
* Checks if there's a SPEC card at bus/def_fn.
* If one (or both) parameters are < 0, takes first available card
......@@ -38,7 +86,7 @@ static int spec_scan(int *bus, int *devfn)
int n, found = 0;
int my_bus, my_devfn;
n = scandir("/sys/bus/pci/drivers/spec", &namelist, 0, 0);
n = scandir("/sys/bus/pci/devices/", &namelist, 0, 0);
if (n < 0)
{
perror("scandir");
......@@ -50,10 +98,15 @@ static int spec_scan(int *bus, int *devfn)
"0000:%02x:%02x.0",
&my_bus, &my_devfn) == 2)
{
if(*bus < 0) *bus = my_bus;
if(*devfn < 0) *devfn = my_devfn;
if(*bus == my_bus && *devfn == my_devfn)
if (*bus >= 0) my_bus = *bus;
if (*devfn >= 0) my_devfn = *devfn;
if (spec_check_id(my_bus, my_devfn))
{
*bus = my_bus;
*devfn = my_devfn;
found = 1;
}
}
free(namelist[n]);
}
......@@ -79,7 +132,7 @@ static void *spec_map_area(int bus, int dev, int bar, size_t size)
int fd;
void *ptr;
snprintf(path, sizeof(path), "/sys/bus/pci/drivers/spec"
snprintf(path, sizeof(path), "/sys/bus/pci/devices/"
"/0000:%02x:%02x.0/resource%d", bus, dev, bar);
fd = open(path, O_RDWR | O_SYNC);
......
tools/speclib.h
View file @ 1d8bb157
......@@ -3,6 +3,12 @@
#include <stdint.h>
/* Vendor/Device ID to identify the SPEC */
#define PCI_VENDOR_ID_CERN 0x10dc
#define PCI_DEVICE_ID_SPEC 0x018d
#define PCI_VENDOR_ID_GENNUM 0x1a39
#define PCI_DEVICE_ID_GN4124 0x0004
/* 'Opens' the SPEC card at PCI bus [bus], device/function [dev].
Returns a handle to the card or NULL in case of failure. */
void *spec_open(int bus, int dev);
......
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