Date: Tue, 6 Apr 2021 15:16:40 GMT From: Marcin Wojtas <mw@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: f2f1ab39c040 - main - pci_user: call bus_translate_resource before BAR mmap Message-ID: <202104061516.136FGeEn063794@gitrepo.freebsd.org>
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The branch main has been updated by mw: URL: https://cgit.FreeBSD.org/src/commit/?id=f2f1ab39c04088ce53287528549e652cf68cee09 commit f2f1ab39c04088ce53287528549e652cf68cee09 Author: Marcin Wojtas <mw@FreeBSD.org> AuthorDate: 2021-04-06 15:10:04 +0000 Commit: Marcin Wojtas <mw@FreeBSD.org> CommitDate: 2021-04-06 15:15:04 +0000 pci_user: call bus_translate_resource before BAR mmap On some armv8 machines it is possible that the mapping between CPU and PCI bus BAR base addresses is not 1:1. In case a BAR is allocated in kernel using bus_alloc_resource_any this translation is handled in ofw_pci_activate_resource. Do the same in pci_user.c by calling bus_translate_resource devmethod. This fixes mmaping BARs to userspace on Marvell SoCs (Armada 7k8k/CN913x) and possibly many other platforms. Submitted by: Kornel Duleba <mindal@semihalf.com> Reviewed by: kib Obtained from: Semihalf Sponsored by: Marvell MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D29604 --- sys/dev/pci/pci_user.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sys/dev/pci/pci_user.c b/sys/dev/pci/pci_user.c index c34fd715707e..0496b3bf6c06 100644 --- a/sys/dev/pci/pci_user.c +++ b/sys/dev/pci/pci_user.c @@ -878,6 +878,11 @@ pci_bar_mmap(device_t pcidev, struct pci_bar_mmap *pbm) if (!PCI_BAR_MEM(pm->pm_value)) return (EIO); membase = pm->pm_value & PCIM_BAR_MEM_BASE; + error = BUS_TRANSLATE_RESOURCE(pcidev, SYS_RES_MEMORY, membase, + &membase); + if (error != 0) + return (error); + pbase = trunc_page(membase); plen = round_page(membase + ((pci_addr_t)1 << pm->pm_size)) - pbase;
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