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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:22 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:22 +0000 |
| commit | b20732900e4636a467c0183a47f7396700f5f743 (patch) | |
| tree | 42f079ff82e701ebcb76829974b4caca3e5b6798 /drivers/pci/mmap.c | |
| parent | Adding upstream version 6.8.12. (diff) | |
| download | linux-b20732900e4636a467c0183a47f7396700f5f743.tar.xz linux-b20732900e4636a467c0183a47f7396700f5f743.zip | |
Adding upstream version 6.9.7.upstream/6.9.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/pci/mmap.c')
| -rw-r--r-- | drivers/pci/mmap.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/pci/mmap.c b/drivers/pci/mmap.c index 4504039056..8da3347a95 100644 --- a/drivers/pci/mmap.c +++ b/drivers/pci/mmap.c @@ -11,6 +11,8 @@ #include <linux/mm.h> #include <linux/pci.h> +#include "pci.h" + #ifdef ARCH_GENERIC_PCI_MMAP_RESOURCE static const struct vm_operations_struct pci_phys_vm_ops = { @@ -50,3 +52,30 @@ int pci_mmap_resource_range(struct pci_dev *pdev, int bar, } #endif + +#if (defined(CONFIG_SYSFS) || defined(CONFIG_PROC_FS)) && \ + (defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)) + +int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, + enum pci_mmap_api mmap_api) +{ + resource_size_t pci_start = 0, pci_end; + unsigned long nr, start, size; + + if (pci_resource_len(pdev, resno) == 0) + return 0; + nr = vma_pages(vma); + start = vma->vm_pgoff; + size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; + if (mmap_api == PCI_MMAP_PROCFS) { + pci_resource_to_user(pdev, resno, &pdev->resource[resno], + &pci_start, &pci_end); + pci_start >>= PAGE_SHIFT; + } + if (start >= pci_start && start < pci_start + size && + start + nr <= pci_start + size) + return 1; + return 0; +} + +#endif |