mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-11 22:06:43 +07:00
e465058d55
This patch hooks Calgary into the build, the x86-64 IOMMU initialization paths, and introduces the Calgary specific bits. The implementation draws inspiration from both PPC (which has support for the same chip but requires firmware support which we don't have on x86-64) and gart. Calgary is different from gart in that it support a translation table per PHB, as opposed to the single gart aperture. Changes from previous version: * Addition of boot-time disablement for bus-level translation/isolation (e.g, enable userspace DMA for things like X) * Usage of newer IOMMU abstraction functions Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by: Jon Mason <jdmason@us.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
150 lines
4.1 KiB
C
150 lines
4.1 KiB
C
#ifndef __x8664_PCI_H
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#define __x8664_PCI_H
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#include <asm/io.h>
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#ifdef __KERNEL__
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#include <linux/mm.h> /* for struct page */
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/* Can be used to override the logic in pci_scan_bus for skipping
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already-configured bus numbers - to be used for buggy BIOSes
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or architectures with incomplete PCI setup by the loader */
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#ifdef CONFIG_PCI
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extern unsigned int pcibios_assign_all_busses(void);
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#else
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#define pcibios_assign_all_busses() 0
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#endif
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#define pcibios_scan_all_fns(a, b) 0
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extern unsigned long pci_mem_start;
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#define PCIBIOS_MIN_IO 0x1000
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#define PCIBIOS_MIN_MEM (pci_mem_start)
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#define PCIBIOS_MIN_CARDBUS_IO 0x4000
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void pcibios_config_init(void);
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struct pci_bus * pcibios_scan_root(int bus);
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extern int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value);
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extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value);
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void pcibios_set_master(struct pci_dev *dev);
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void pcibios_penalize_isa_irq(int irq, int active);
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struct irq_routing_table *pcibios_get_irq_routing_table(void);
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int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <asm/scatterlist.h>
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#include <linux/string.h>
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#include <asm/page.h>
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extern void pci_iommu_alloc(void);
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extern int iommu_setup(char *opt);
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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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#if defined(CONFIG_IOMMU) || defined(CONFIG_CALGARY_IOMMU)
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/*
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* x86-64 always supports DAC, but sometimes it is useful to force
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* devices through the IOMMU to get automatic sg list merging.
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* Optional right now.
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*/
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extern int iommu_sac_force;
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#define pci_dac_dma_supported(pci_dev, mask) (!iommu_sac_force)
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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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#else
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/* No IOMMU */
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#define pci_dac_dma_supported(pci_dev, mask) 1
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#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
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#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
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#define pci_unmap_addr(PTR, ADDR_NAME) (0)
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#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
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#define pci_unmap_len(PTR, LEN_NAME) (0)
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#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
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#endif
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#include <asm-generic/pci-dma-compat.h>
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static inline dma64_addr_t
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pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
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{
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return ((dma64_addr_t) page_to_phys(page) +
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(dma64_addr_t) offset);
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}
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static inline struct page *
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pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
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{
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return virt_to_page(__va(dma_addr));
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}
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static inline unsigned long
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pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
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{
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return (dma_addr & ~PAGE_MASK);
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}
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static inline void
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pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
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{
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}
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static inline void
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pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
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{
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flush_write_buffers();
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}
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#ifdef CONFIG_PCI
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static inline void pci_dma_burst_advice(struct pci_dev *pdev,
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enum pci_dma_burst_strategy *strat,
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unsigned long *strategy_parameter)
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{
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*strat = PCI_DMA_BURST_INFINITY;
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*strategy_parameter = ~0UL;
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}
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#endif
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#define HAVE_PCI_MMAP
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extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
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enum pci_mmap_state mmap_state, int write_combine);
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static inline void pcibios_add_platform_entries(struct pci_dev *dev)
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{
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}
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#endif /* __KERNEL__ */
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/* generic pci stuff */
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#ifdef CONFIG_PCI
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#include <asm-generic/pci.h>
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#endif
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#endif /* __x8664_PCI_H */
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