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pci: add function to get currently loaded kernel driver

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This commit is contained in:
Steffen Vogel 2018-01-30 19:09:19 +01:00
parent bd4f547e97
commit 293f496db0
2 changed files with 23 additions and 1 deletions
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3
fpga/include/villas/kernel/pci.h
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@ -57,6 +57,9 @@ int pci_device_compare(const struct pci_device *d, const struct pci_device *f);
struct pci_device * pci_lookup_device(struct pci *p, struct pci_device *filter);
/** Get currently loaded driver for device */
int pci_get_driver(struct pci_device *d, char *buf, size_t buflen);
/** Bind a new LKM to the PCI device */
int pci_attach_driver(struct pci_device *d, const char *driver);

21
fpga/lib/kernel/pci.c
View file

@ -254,10 +254,29 @@ struct pci_device * pci_lookup_device(struct pci *p, struct pci_device *f)
return list_search(&p->devices, (cmp_cb_t) pci_device_compare, (void *) f);
}
int pci_get_driver(struct pci_device *d, char *buf, size_t buflen)
{
int ret;
char sysfs[1024], syml[1024];
snprintf(sysfs, sizeof(sysfs), "%s/bus/pci/devices/%04x:%02x:%02x.%x/driver", SYSFS_PATH,
d->slot.domain, d->slot.bus, d->slot.device, d->slot.function);
ret = readlink(sysfs, syml, sizeof(syml));
if (ret < 0)
return ret;
char *driver = basename(syml);
strncpy(buf, driver, buflen);
return 0;
}
int pci_attach_driver(struct pci_device *d, const char *driver)
{
FILE *f;
char fn[256];
char fn[1024];
/* Add new ID to driver */
snprintf(fn, sizeof(fn), "%s/bus/pci/drivers/%s/new_id", SYSFS_PATH, driver);