git: 479c61bd5f66 - main - linuxkpi: Add `pci_get_base_class()`

The branch main has been updated by dumbbell:

URL: https://cgit.FreeBSD.org/src/commit/?id=479c61bd5f661f0e5927276c7eaea074235f6acc

commit 479c61bd5f661f0e5927276c7eaea074235f6acc
Author:     Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
AuthorDate: 2024-12-22 16:26:49 +0000
Commit:     Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
CommitDate: 2025-01-31 16:00:47 +0000

    linuxkpi: Add `pci_get_base_class()`
    
    [Why]
    This new API is used by the amdgpu DRM driver is Linux 6.7.
    
    [How]
    This is the same as `pci_get_class()` except that it searches a PCI
    device matching the base class only; the subclass is ignored.
    
    Reviewed by:    manu
    Sponsored by:   The FreeBSD Foundation
    Differential Revision: https://reviews.freebsd.org/D48746
---
 sys/compat/linuxkpi/common/include/linux/pci.h |  3 +++
 sys/compat/linuxkpi/common/src/linux_pci.c     | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/pci.h b/sys/compat/linuxkpi/common/include/linux/pci.h
index aa6b778c3477..782f79080873 100644
--- a/sys/compat/linuxkpi/common/include/linux/pci.h
+++ b/sys/compat/linuxkpi/common/include/linux/pci.h
@@ -1355,6 +1355,9 @@ pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn, int pos,
 
 struct pci_dev *lkpi_pci_get_class(unsigned int class, struct pci_dev *from);
 #define	pci_get_class(class, from)	lkpi_pci_get_class(class, from)
+struct pci_dev *lkpi_pci_get_base_class(unsigned int class,
+    struct pci_dev *from);
+#define	pci_get_base_class(class, from)	lkpi_pci_get_base_class(class, from)
 
 /* -------------------------------------------------------------------------- */
 
diff --git a/sys/compat/linuxkpi/common/src/linux_pci.c b/sys/compat/linuxkpi/common/src/linux_pci.c
index 366731081072..a9942a657dce 100644
--- a/sys/compat/linuxkpi/common/src/linux_pci.c
+++ b/sys/compat/linuxkpi/common/src/linux_pci.c
@@ -400,6 +400,24 @@ lkpi_pci_get_class(unsigned int class, struct pci_dev *from)
 	return (pdev);
 }
 
+struct pci_dev *
+lkpi_pci_get_base_class(unsigned int baseclass, struct pci_dev *from)
+{
+	device_t dev;
+	device_t devfrom = NULL;
+	struct pci_dev *pdev;
+
+	if (from != NULL)
+		devfrom = from->dev.bsddev;
+
+	dev = pci_find_base_class_from(baseclass, devfrom);
+	if (dev == NULL)
+		return (NULL);
+
+	pdev = lkpinew_pci_dev(dev);
+	return (pdev);
+}
+
 struct pci_dev *
 lkpi_pci_get_domain_bus_and_slot(int domain, unsigned int bus,
     unsigned int devfn)