Date: Wed, 25 Oct 2023 00:41:44 GMT From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: ec31ca0a48e4 - releng/14.0 - acpi_pcib: Trust decoded bus range from _CRS over _BBN Message-ID: <202310250041.39P0fik0005652@gitrepo.freebsd.org>
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The branch releng/14.0 has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=ec31ca0a48e4f2a6d4c406a1aacc6b44e5cbb7aa commit ec31ca0a48e4f2a6d4c406a1aacc6b44e5cbb7aa Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2023-10-16 22:19:07 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2023-10-24 19:27:31 +0000 acpi_pcib: Trust decoded bus range from _CRS over _BBN Currently if _BBN doesn't match the first bus in the decoded bus range from _CRS for a Host to PCI bridge, the driver fails to attach as a defensive measure. There is now firmware in the field where these do not match, and the _BBN values are clearly wrong, so rather than failing attach, trust the range from _CRS over _BBN. Co-authored-by: Justin Gibbs <gibbs@FreeBSD.org> Reported by: gibbs Reviewed by: imp (earlier version) Differential Revision: https://reviews.freebsd.org/D42231 (cherry picked from commit 22a6678b627b39ceb94f7323be1010e928d92494) (cherry picked from commit 76b37faac869aac7e889da3ac291207606a20e51) Approved by: re (gjb) --- sys/dev/acpica/acpi_pcib_acpi.c | 30 +++++++++++++++++++----------- 1 file changed, 19 insertions(+), 11 deletions(-) diff --git a/sys/dev/acpica/acpi_pcib_acpi.c b/sys/dev/acpica/acpi_pcib_acpi.c index 0575b1d83bb1..02e3a0be5956 100644 --- a/sys/dev/acpica/acpi_pcib_acpi.c +++ b/sys/dev/acpica/acpi_pcib_acpi.c @@ -289,7 +289,8 @@ acpi_pcib_producer_handler(ACPI_RESOURCE *res, void *context) #if defined(NEW_PCIB) && defined(PCI_RES_BUS) static int -first_decoded_bus(struct acpi_hpcib_softc *sc, rman_res_t *startp) +decoded_bus_range(struct acpi_hpcib_softc *sc, rman_res_t *startp, + rman_res_t *endp) { struct resource_list_entry *rle; @@ -297,6 +298,7 @@ first_decoded_bus(struct acpi_hpcib_softc *sc, rman_res_t *startp) if (rle == NULL) return (ENXIO); *startp = rle->start; + *endp = rle->end; return (0); } #endif @@ -366,7 +368,7 @@ acpi_pcib_acpi_attach(device_t dev) u_int slot, func, busok; #if defined(NEW_PCIB) && defined(PCI_RES_BUS) struct resource *bus_res; - rman_res_t start; + rman_res_t end, start; int rid; #endif int error, domain; @@ -495,7 +497,7 @@ acpi_pcib_acpi_attach(device_t dev) * If we have a region of bus numbers, use the first * number for our bus. */ - if (first_decoded_bus(sc, &start) == 0) + if (decoded_bus_range(sc, &start, &end) == 0) sc->ap_bus = start; else { rid = 0; @@ -512,15 +514,21 @@ acpi_pcib_acpi_attach(device_t dev) } } else { /* - * Require the bus number from _BBN to match the start of any - * decoded range. + * If there is a decoded bus range, assume the bus number is + * the first value in the range. Warn if _BBN doesn't match. */ - if (first_decoded_bus(sc, &start) == 0 && sc->ap_bus != start) { - device_printf(dev, - "bus number %d does not match start of decoded range %ju\n", - sc->ap_bus, (uintmax_t)start); - pcib_host_res_free(dev, &sc->ap_host_res); - return (ENXIO); + if (decoded_bus_range(sc, &start, &end) == 0) { + if (sc->ap_bus != start) { + device_printf(dev, + "WARNING: BIOS configured bus number (%d) is " + "not within decoded bus number range " + "(%ju - %ju).\n", + sc->ap_bus, (uintmax_t)start, (uintmax_t)end); + device_printf(dev, + "Using range start (%ju) as bus number.\n", + (uintmax_t)start); + sc->ap_bus = start; + } } } #else
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