From 243000b19f8b4ab104b584b2d16bc6aa9131c9b5 Mon Sep 17 00:00:00 2001 From: Wojciech Macek Date: Fri, 9 Apr 2021 09:28:44 +0200 Subject: [PATCH] pci_dw: Trim ATU windows bigger than 4GB The size of the ATU MEM/IO windows is implicitly casted to uint32_t. Because of that some window sizes were silently demoted to 0 and ignored. Check the size if its too large, trim it to 4GB and print a warning message. Submitted by: Kornel Duleba Reviewed by: mw Obtained from: Semihalf Sponsored by: Marvell Differential revision: https://reviews.freebsd.org/D29625 --- sys/dev/pci/pci_dw.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/sys/dev/pci/pci_dw.c b/sys/dev/pci/pci_dw.c index 161a68d2929d..f0aae5bf8418 100644 --- a/sys/dev/pci/pci_dw.c +++ b/sys/dev/pci/pci_dw.c @@ -342,6 +342,18 @@ pci_dw_decode_ranges(struct pci_dw_softc *sc, struct ofw_pci_range *ranges, " Not all required ranges are found in DT\n"); return (ENXIO); } + if (sc->io_range.size > UINT32_MAX) { + device_printf(sc->dev, + "ATU IO window size is too large. Up to 4GB windows " + "are supported, trimming window size to 4GB\n"); + sc->io_range.size = UINT32_MAX; + } + if (sc->mem_range.size > UINT32_MAX) { + device_printf(sc->dev, + "ATU MEM window size is too large. Up to 4GB windows " + "are supported, trimming window size to 4GB\n"); + sc->mem_range.size = UINT32_MAX; + } return (0); }