157 строки
4.1 KiB
C
157 строки
4.1 KiB
C
#ifndef _DMA_REMAPPING_H
|
|
#define _DMA_REMAPPING_H
|
|
|
|
/*
|
|
* VT-d hardware uses 4KiB page size regardless of host page size.
|
|
*/
|
|
#define VTD_PAGE_SHIFT (12)
|
|
#define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT)
|
|
#define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT)
|
|
#define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK)
|
|
|
|
#define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT)
|
|
#define DMA_32BIT_PFN IOVA_PFN(DMA_32BIT_MASK)
|
|
#define DMA_64BIT_PFN IOVA_PFN(DMA_64BIT_MASK)
|
|
|
|
|
|
/*
|
|
* 0: Present
|
|
* 1-11: Reserved
|
|
* 12-63: Context Ptr (12 - (haw-1))
|
|
* 64-127: Reserved
|
|
*/
|
|
struct root_entry {
|
|
u64 val;
|
|
u64 rsvd1;
|
|
};
|
|
#define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry))
|
|
static inline bool root_present(struct root_entry *root)
|
|
{
|
|
return (root->val & 1);
|
|
}
|
|
static inline void set_root_present(struct root_entry *root)
|
|
{
|
|
root->val |= 1;
|
|
}
|
|
static inline void set_root_value(struct root_entry *root, unsigned long value)
|
|
{
|
|
root->val |= value & VTD_PAGE_MASK;
|
|
}
|
|
|
|
struct context_entry;
|
|
static inline struct context_entry *
|
|
get_context_addr_from_root(struct root_entry *root)
|
|
{
|
|
return (struct context_entry *)
|
|
(root_present(root)?phys_to_virt(
|
|
root->val & VTD_PAGE_MASK) :
|
|
NULL);
|
|
}
|
|
|
|
/*
|
|
* low 64 bits:
|
|
* 0: present
|
|
* 1: fault processing disable
|
|
* 2-3: translation type
|
|
* 12-63: address space root
|
|
* high 64 bits:
|
|
* 0-2: address width
|
|
* 3-6: aval
|
|
* 8-23: domain id
|
|
*/
|
|
struct context_entry {
|
|
u64 lo;
|
|
u64 hi;
|
|
};
|
|
#define context_present(c) ((c).lo & 1)
|
|
#define context_fault_disable(c) (((c).lo >> 1) & 1)
|
|
#define context_translation_type(c) (((c).lo >> 2) & 3)
|
|
#define context_address_root(c) ((c).lo & VTD_PAGE_MASK)
|
|
#define context_address_width(c) ((c).hi & 7)
|
|
#define context_domain_id(c) (((c).hi >> 8) & ((1 << 16) - 1))
|
|
|
|
#define context_set_present(c) do {(c).lo |= 1;} while (0)
|
|
#define context_set_fault_enable(c) \
|
|
do {(c).lo &= (((u64)-1) << 2) | 1;} while (0)
|
|
#define context_set_translation_type(c, val) \
|
|
do { \
|
|
(c).lo &= (((u64)-1) << 4) | 3; \
|
|
(c).lo |= ((val) & 3) << 2; \
|
|
} while (0)
|
|
#define CONTEXT_TT_MULTI_LEVEL 0
|
|
#define context_set_address_root(c, val) \
|
|
do {(c).lo |= (val) & VTD_PAGE_MASK; } while (0)
|
|
#define context_set_address_width(c, val) do {(c).hi |= (val) & 7;} while (0)
|
|
#define context_set_domain_id(c, val) \
|
|
do {(c).hi |= ((val) & ((1 << 16) - 1)) << 8;} while (0)
|
|
#define context_clear_entry(c) do {(c).lo = 0; (c).hi = 0;} while (0)
|
|
|
|
/*
|
|
* 0: readable
|
|
* 1: writable
|
|
* 2-6: reserved
|
|
* 7: super page
|
|
* 8-11: available
|
|
* 12-63: Host physcial address
|
|
*/
|
|
struct dma_pte {
|
|
u64 val;
|
|
};
|
|
#define dma_clear_pte(p) do {(p).val = 0;} while (0)
|
|
|
|
#define DMA_PTE_READ (1)
|
|
#define DMA_PTE_WRITE (2)
|
|
|
|
#define dma_set_pte_readable(p) do {(p).val |= DMA_PTE_READ;} while (0)
|
|
#define dma_set_pte_writable(p) do {(p).val |= DMA_PTE_WRITE;} while (0)
|
|
#define dma_set_pte_prot(p, prot) \
|
|
do {(p).val = ((p).val & ~3) | ((prot) & 3); } while (0)
|
|
#define dma_pte_addr(p) ((p).val & VTD_PAGE_MASK)
|
|
#define dma_set_pte_addr(p, addr) do {\
|
|
(p).val |= ((addr) & VTD_PAGE_MASK); } while (0)
|
|
#define dma_pte_present(p) (((p).val & 3) != 0)
|
|
|
|
struct intel_iommu;
|
|
|
|
struct dmar_domain {
|
|
int id; /* domain id */
|
|
struct intel_iommu *iommu; /* back pointer to owning iommu */
|
|
|
|
struct list_head devices; /* all devices' list */
|
|
struct iova_domain iovad; /* iova's that belong to this domain */
|
|
|
|
struct dma_pte *pgd; /* virtual address */
|
|
spinlock_t mapping_lock; /* page table lock */
|
|
int gaw; /* max guest address width */
|
|
|
|
/* adjusted guest address width, 0 is level 2 30-bit */
|
|
int agaw;
|
|
|
|
#define DOMAIN_FLAG_MULTIPLE_DEVICES 1
|
|
int flags;
|
|
};
|
|
|
|
/* PCI domain-device relationship */
|
|
struct device_domain_info {
|
|
struct list_head link; /* link to domain siblings */
|
|
struct list_head global; /* link to global list */
|
|
u8 bus; /* PCI bus numer */
|
|
u8 devfn; /* PCI devfn number */
|
|
struct pci_dev *dev; /* it's NULL for PCIE-to-PCI bridge */
|
|
struct dmar_domain *domain; /* pointer to domain */
|
|
};
|
|
|
|
extern int init_dmars(void);
|
|
extern void free_dmar_iommu(struct intel_iommu *iommu);
|
|
|
|
extern int dmar_disabled;
|
|
|
|
#ifndef CONFIG_DMAR_GFX_WA
|
|
static inline void iommu_prepare_gfx_mapping(void)
|
|
{
|
|
return;
|
|
}
|
|
#endif /* !CONFIG_DMAR_GFX_WA */
|
|
|
|
#endif
|