diff options
| author | Niclas Zeising <zeising@daemonic.se> | 2019-06-15 10:59:00 +0200 |
|---|---|---|
| committer | Niclas Zeising <zeising@daemonic.se> | 2019-07-10 18:56:23 +0200 |
| commit | b40f387048a5c7b280d0c83d3af9d34ceca7f4f8 (patch) | |
| tree | d17652ecce43db893c3e3bc347329cebd21a330e /src | |
| parent | baa4084474665e34a8d6a9bba0e97d9aa5dcd88a (diff) | |
freebsd_pci: Add has_kernel_driver function
Add a has_kernel_driver function to the FreeBSD libpciaccess functions.
This uses the PCIOCATTACHED ioctl to check if a driver is attached to a
specific PCI device.
Idea taken from the FreeBSD system utility pciconf.
Signed-off-by: Niclas Zeising <zeising@daemonic.se>
Diffstat (limited to 'src')
| -rw-r--r-- | src/freebsd_pci.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/freebsd_pci.c b/src/freebsd_pci.c index d140474..dc67895 100644 --- a/src/freebsd_pci.c +++ b/src/freebsd_pci.c @@ -584,6 +584,24 @@ pci_system_freebsd_destroy( void ) freebsd_pci_sys = NULL; } +static int +pci_device_freebsd_has_kernel_driver( struct pci_device *dev ) +{ + struct pci_io io; + + io.pi_sel.pc_domain = dev->domain; + io.pi_sel.pc_bus = dev->bus; + io.pi_sel.pc_dev = dev->dev; + io.pi_sel.pc_func = dev->func; + + if ( ioctl( freebsd_pci_sys->pcidev, PCIOCATTACHED, &io ) < 0 ) { + return 0; + } + + /* if io.pi_data is 0, no driver is attached */ + return io.pi_data == 0 ? 0 : 1; +} + static struct pci_io_handle * pci_device_freebsd_open_legacy_io( struct pci_io_handle *ret, struct pci_device *dev, pciaddr_t base, @@ -755,6 +773,7 @@ static const struct pci_system_methods freebsd_pci_methods = { .read = pci_device_freebsd_read, .write = pci_device_freebsd_write, .fill_capabilities = pci_fill_capabilities_generic, + .has_kernel_driver = pci_device_freebsd_has_kernel_driver, .open_device_io = pci_device_freebsd_open_io, .open_legacy_io = pci_device_freebsd_open_legacy_io, .close_io = pci_device_freebsd_close_io, |