git: 12ce57e6d3e7 - stable/13 - pcib: Allocate the memory BAR with the MSI-X table.

The branch stable/13 has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=12ce57e6d3e770db9ca83a8cbaa8f332515ce3d7

commit 12ce57e6d3e770db9ca83a8cbaa8f332515ce3d7
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2023-06-19 16:15:48 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2023-06-28 01:32:47 +0000

    pcib: Allocate the memory BAR with the MSI-X table.
    
    This is required for pci_alloc_msix() to work and to thus use
    MSI-X interrupts for PCI-e hotplug.
    
    Reported by:    cperciva
    Reviewed by:    cperciva
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D40581
    
    (cherry picked from commit e6b838363fb473b5e35a8ae6a1da5e15f5b52960)
---
 sys/dev/pci/pci_pci.c      | 23 ++++++++++++++++++-----
 sys/dev/pci/pcib_private.h |  1 +
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/sys/dev/pci/pci_pci.c b/sys/dev/pci/pci_pci.c
index b735da657a6c..4284b1cbf567 100644
--- a/sys/dev/pci/pci_pci.c
+++ b/sys/dev/pci/pci_pci.c
@@ -1324,7 +1324,7 @@ static int
 pcib_alloc_pcie_irq(struct pcib_softc *sc)
 {
 	device_t dev;
-	int count, error, rid;
+	int count, error, mem_rid, rid;
 
 	rid = -1;
 	dev = sc->dev;
@@ -1336,9 +1336,17 @@ pcib_alloc_pcie_irq(struct pcib_softc *sc)
 	 */
 	count = pci_msix_count(dev);
 	if (count == 1) {
-		error = pci_alloc_msix(dev, &count);
-		if (error == 0)
-			rid = 1;
+		mem_rid = pci_msix_table_bar(dev);
+		sc->pcie_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+		    &mem_rid, RF_ACTIVE);
+		if (sc->pcie_mem == NULL) {
+			device_printf(dev,
+			    "Failed to allocate BAR for MSI-X table\n");
+		} else {
+			error = pci_alloc_msix(dev, &count);
+			if (error == 0)
+				rid = 1;
+		}
 	}
 
 	if (rid < 0 && pci_msi_count(dev) > 0) {
@@ -1386,7 +1394,12 @@ pcib_release_pcie_irq(struct pcib_softc *sc)
 	error = bus_free_resource(dev, SYS_RES_IRQ, sc->pcie_irq);
 	if (error)
 		return (error);
-	return (pci_release_msi(dev));
+	error = pci_release_msi(dev);
+	if (error)
+		return (error);
+	if (sc->pcie_mem != NULL)
+		error = bus_free_resource(dev, SYS_RES_MEMORY, sc->pcie_mem);
+	return (error);
 }
 
 static void
diff --git a/sys/dev/pci/pcib_private.h b/sys/dev/pci/pcib_private.h
index af0b70a7add3..0dea325b6436 100644
--- a/sys/dev/pci/pcib_private.h
+++ b/sys/dev/pci/pcib_private.h
@@ -134,6 +134,7 @@ struct pcib_softc
     uint16_t	pcie_link_sta;
     uint16_t	pcie_slot_sta;
     uint32_t	pcie_slot_cap;
+    struct resource *pcie_mem;
     struct resource *pcie_irq;
     void	*pcie_ihand;
     struct task	pcie_hp_task;