git: 5493c6277a26 - main - LinuxKPI: pci.h MODULE_DEVICE_TABLE to MODULE_PNP_INFO

The branch main has been updated by bz:

URL: https://cgit.FreeBSD.org/src/commit/?id=5493c6277a264e91ea4bdc7e2d4ee69fe4210918

commit 5493c6277a264e91ea4bdc7e2d4ee69fe4210918
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2022-03-04 00:06:34 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2022-03-04 00:12:45 +0000

    LinuxKPI: pci.h MODULE_DEVICE_TABLE to MODULE_PNP_INFO
    
    Implement MODULE_PNP_INFO() support in LinuxKPI for the Linux
    MODULE_DEVICE_TABLE.
    
    This will allow us to auto-load LinuxKPI PCI drivers (drm-kmod do
    not currently as they attach to vgapci0 which in turn grabs the PCI
    to my understanding) and make any loading from loader or kld_list in
    rc.conf unnecessary; see devmatch(8) for more information.
    
    We need to ensure there is a DRIVER_MODULE() (or probably just
    a DECLARE_MODULE but that makes not much difference) before the
    MODULE_PNP_INFO (which we otherwise would not need).
    
    Sponsored by:   The FreeBSD Foundation
    MFC after:      3 days
    Reviewed by:    imp, hselasky, manu
    Differential Revision:  https://reviews.freebsd.org/D26651
---
 sys/compat/linuxkpi/common/include/linux/pci.h | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/sys/compat/linuxkpi/common/include/linux/pci.h b/sys/compat/linuxkpi/common/include/linux/pci.h
index 995a073c2b40..7bf785fb209a 100644
--- a/sys/compat/linuxkpi/common/include/linux/pci.h
+++ b/sys/compat/linuxkpi/common/include/linux/pci.h
@@ -41,6 +41,7 @@
 
 #include <sys/param.h>
 #include <sys/bus.h>
+#include <sys/module.h>
 #include <sys/nv.h>
 #include <sys/pciio.h>
 #include <sys/rman.h>
@@ -69,7 +70,26 @@ struct pci_device_id {
 	uintptr_t	driver_data;
 };
 
-#define	MODULE_DEVICE_TABLE(bus, table)
+/* Linux has an empty element at the end of the ID table -> nitems() - 1. */
+#define	MODULE_DEVICE_TABLE(_bus, _table)				\
+									\
+static device_method_t _ ## _bus ## _ ## _table ## _methods[] = {	\
+	DEVMETHOD_END							\
+};									\
+									\
+static driver_t _ ## _bus ## _ ## _table ## _driver = {			\
+	"lkpi_" #_bus #_table,						\
+	_ ## _bus ## _ ## _table ## _methods,				\
+	0								\
+};									\
+									\
+static devclass_t _ ## _bus ## _ ## _table ## _devclass;		\
+									\
+DRIVER_MODULE(lkpi_ ## _table, pci, _ ## _bus ## _ ## _table ## _driver,\
+	_ ## _bus ## _ ## _table ## _devclass, 0, 0);			\
+									\
+MODULE_PNP_INFO("U32:vendor;U32:device;V32:subvendor;V32:subdevice",	\
+    _bus, lkpi_ ## _table, _table, nitems(_table) - 1)
 
 #define	PCI_ANY_ID			-1U