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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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b627c8b17c
Impact: fix boot crash on AMD IOMMU if CONFIG_GART_IOMMU is off Currently these macros evaluate to a no-op except the kernel is compiled with GART or Calgary support. But we also need these macros when we have SWIOTLB, VT-d or AMD IOMMU in the kernel. Since we always compile at least with SWIOTLB we can define these macros always. This patch is also for stable backport for the same reason the SWIOTLB default selection patch is. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
#ifndef _ASM_X86_PCI_64_H
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#define _ASM_X86_PCI_64_H
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#ifdef __KERNEL__
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#ifdef CONFIG_CALGARY_IOMMU
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static inline void *pci_iommu(struct pci_bus *bus)
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{
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struct pci_sysdata *sd = bus->sysdata;
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return sd->iommu;
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}
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static inline void set_pci_iommu(struct pci_bus *bus, void *val)
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{
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struct pci_sysdata *sd = bus->sysdata;
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sd->iommu = val;
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}
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#endif /* CONFIG_CALGARY_IOMMU */
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extern int (*pci_config_read)(int seg, int bus, int dev, int fn,
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int reg, int len, u32 *value);
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extern int (*pci_config_write)(int seg, int bus, int dev, int fn,
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int reg, int len, u32 value);
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extern void dma32_reserve_bootmem(void);
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extern void pci_iommu_alloc(void);
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/* The PCI address space does equal the physical memory
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* address space. The networking and block device layers use
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* this boolean for bounce buffer decisions
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*
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* On AMD64 it mostly equals, but we set it to zero if a hardware
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* IOMMU (gart) of sotware IOMMU (swiotlb) is available.
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*/
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#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
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#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
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dma_addr_t ADDR_NAME;
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#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
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__u32 LEN_NAME;
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#define pci_unmap_addr(PTR, ADDR_NAME) \
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((PTR)->ADDR_NAME)
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#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
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(((PTR)->ADDR_NAME) = (VAL))
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#define pci_unmap_len(PTR, LEN_NAME) \
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((PTR)->LEN_NAME)
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#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
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(((PTR)->LEN_NAME) = (VAL))
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#endif /* __KERNEL__ */
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#endif /* _ASM_X86_PCI_64_H */
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