git: 67c01ebfc241 - stable/15 - LinuxKPI: pci: add pci_select_bars() and pci_msix_vec_count()

The branch stable/15 has been updated by bz:

URL: https://cgit.FreeBSD.org/src/commit/?id=67c01ebfc241a2ee9037f9ca85efc84ccdd56982

commit 67c01ebfc241a2ee9037f9ca85efc84ccdd56982
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2026-08-16 21:32:31 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2026-09-19 09:34:10 +0000

    LinuxKPI: pci: add pci_select_bars() and pci_msix_vec_count()
    
    For pci_select_bars() we use the LinuxKPI internal information, while
    for pci_select_bars() we fall back to the native PCI stack.
    
    Needed by a wifi driver.
    
    Reviewed by:    dumbbell
    Differential Revision: https://reviews.freebsd.org/D58878
    
    (cherry picked from commit 55c07af60172b211116be47010fc0831aafc99e8)
---
 sys/compat/linuxkpi/common/include/linux/pci.h | 29 ++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/pci.h b/sys/compat/linuxkpi/common/include/linux/pci.h
index 8cd52707a7bd..6efd43f311cf 100644
--- a/sys/compat/linuxkpi/common/include/linux/pci.h
+++ b/sys/compat/linuxkpi/common/include/linux/pci.h
@@ -437,6 +437,24 @@ pci_resource_flags(struct pci_dev *pdev, int bar)
 	return (1 << type);
 }
 
+static inline int
+pci_select_bars(struct pci_dev *pdev, unsigned long flags)
+{
+	int bars, bar;
+
+	bars = 0;
+	/* We only support BARs here; Linux may support more types. */
+	for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) {
+		int bar_flags;
+
+		bar_flags = pci_resource_flags(pdev, bar);
+		if ((bar_flags & flags) != 0)
+			bars |= (1 << bar);
+	}
+
+	return (bars);
+}
+
 static inline const char *
 pci_name(struct pci_dev *d)
 {
@@ -1569,6 +1587,17 @@ pci_irq_vector(struct pci_dev *pdev, unsigned int vector)
         return (-ENXIO);
 }
 
+static inline int
+pci_msix_vec_count(struct pci_dev *pdev)
+{
+	int avail;
+
+	avail = pci_msix_count(pdev->dev.bsddev);
+	if (avail == 0)
+		return (-EINVAL);
+	return (avail);
+}
+
 static inline int
 pci_wake_from_d3(struct pci_dev *pdev, bool enable)
 {