git: 4081882c415b - stable/13 - powerpcspe: fix PCI enumeration on ppce500

The branch stable/13 has been updated by alfredo:

URL: https://cgit.FreeBSD.org/src/commit/?id=4081882c415b4d4aadec140df3658163d55c6d7b

commit 4081882c415b4d4aadec140df3658163d55c6d7b
Author:     Alfredo Dal'Ava Junior <alfredo@FreeBSD.org>
AuthorDate: 2022-03-21 10:57:07 +0000
Commit:     Alfredo Dal'Ava Junior <alfredo@FreeBSD.org>
CommitDate: 2022-03-25 11:07:09 +0000

    powerpcspe: fix PCI enumeration on ppce500
    
    This fixes PCI devices not being found on QEMU ppce500. This
    generic board used to have its first PCI slot at 0x11, like the
    mpc8544dsi and some real HW. After commit [1], it was changed to
    0x1 and our driver wasn't prepared for that.
    
    [1] https://gitlab.com/qemu-project/qemu/-/commit/3bb7e02a9725a24e5bf915b35f914f82f5b07a1f
    
    Reviewed by:    jhibbits, bdragon
    MFC after:      2 days
    Sponsored by:   Institudo de Pesquisas Eldorado (eldorado.org.br)
    Differential Revision:  https://reviews.freebsd.org/D34621
    
    (cherry picked from commit 27f56d337be39a3f493febb585f3484c4cb6c3b6)
---
 sys/powerpc/mpc85xx/pci_mpc85xx.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/sys/powerpc/mpc85xx/pci_mpc85xx.c b/sys/powerpc/mpc85xx/pci_mpc85xx.c
index b7035e372105..909c7ef8cd6b 100644
--- a/sys/powerpc/mpc85xx/pci_mpc85xx.c
+++ b/sys/powerpc/mpc85xx/pci_mpc85xx.c
@@ -138,7 +138,8 @@ __FBSDID("$FreeBSD$");
 
 #define	DEVFN(b, s, f)	((b << 16) | (s << 8) | f)
 
-#define	FSL_NUM_MSIS		256	/* 8 registers of 32 bits (8 hardware IRQs) */
+#define	FSL_NUM_MSIS	256	/* 8 registers of 32 bits (8 hardware IRQs) */
+#define	PCI_SLOT_FIRST	0x1	/* used to be 0x11 but qemu-ppce500 starts from 0x1 */
 
 struct fsl_pcib_softc {
 	struct ofw_pci_softc pci_sc;
@@ -552,7 +553,8 @@ fsl_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func,
 	struct fsl_pcib_softc *sc = device_get_softc(dev);
 	u_int devfn;
 
-	if (bus == sc->sc_busnr && !sc->sc_pcie && slot < 10)
+	if (bus == sc->sc_busnr && !sc->sc_pcie &&
+	    slot < PCI_SLOT_FIRST)
 		return (~0);
 	devfn = DEVFN(bus, slot, func);
 
@@ -565,7 +567,8 @@ fsl_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
 {
 	struct fsl_pcib_softc *sc = device_get_softc(dev);
 
-	if (bus == sc->sc_busnr && !sc->sc_pcie && slot < 10)
+	if (bus == sc->sc_busnr && !sc->sc_pcie &&
+	    slot < PCI_SLOT_FIRST)
 		return;
 	fsl_pcib_cfgwrite(sc, bus, slot, func, reg, val, bytes);
 }