diff options
| author | Omer Shpigelman <oshpigelman@habana.ai> | 2019-02-24 10:17:55 +0300 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2019-02-24 10:17:55 +0300 |
| commit | 66542c3b9d2fe179f7392f01aaf49a5b432426a7 (patch) | |
| tree | 55cdef7a76cc74e20d86719bf0f7057d5dbaafb0 /drivers/misc/habanalabs/include | |
| parent | d75bcf3e5d60d4e586f3fb20f2cc9041667497a7 (diff) | |
| download | linux-66542c3b9d2fe179f7392f01aaf49a5b432426a7.tar.xz | |
habanalabs: add MMU shadow mapping
This patch adds shadow mapping to the MMU module. The shadow mapping
allows traversing the page table in host memory rather reading each PTE
from the device memory.
It brings better performance and avoids reading from invalid device
address upon PCI errors.
Only at the end of map/unmap flow, writings to the device are performed in
order to sync the H/W page tables with the shadow ones.
Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc/habanalabs/include')
| -rw-r--r-- | drivers/misc/habanalabs/include/hw_ip/mmu/mmu_general.h | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/misc/habanalabs/include/hw_ip/mmu/mmu_general.h b/drivers/misc/habanalabs/include/hw_ip/mmu/mmu_general.h index b680052ee3f0..71ea3c3e8ba3 100644 --- a/drivers/misc/habanalabs/include/hw_ip/mmu/mmu_general.h +++ b/drivers/misc/habanalabs/include/hw_ip/mmu/mmu_general.h @@ -14,16 +14,16 @@ #define PAGE_SIZE_4KB (_AC(1, UL) << PAGE_SHIFT_4KB) #define PAGE_MASK_2MB (~(PAGE_SIZE_2MB - 1)) -#define PAGE_PRESENT_MASK 0x0000000000001 -#define SWAP_OUT_MASK 0x0000000000004 -#define LAST_MASK 0x0000000000800 -#define PHYS_ADDR_MASK 0x3FFFFFFFFF000ull +#define PAGE_PRESENT_MASK 0x0000000000001ull +#define SWAP_OUT_MASK 0x0000000000004ull +#define LAST_MASK 0x0000000000800ull +#define PHYS_ADDR_MASK 0xFFFFFFFFFFFFF000ull #define HOP0_MASK 0x3000000000000ull #define HOP1_MASK 0x0FF8000000000ull #define HOP2_MASK 0x0007FC0000000ull -#define HOP3_MASK 0x000003FE00000 -#define HOP4_MASK 0x00000001FF000 -#define OFFSET_MASK 0x0000000000FFF +#define HOP3_MASK 0x000003FE00000ull +#define HOP4_MASK 0x00000001FF000ull +#define OFFSET_MASK 0x0000000000FFFull #define HOP0_SHIFT 48 #define HOP1_SHIFT 39 @@ -32,7 +32,7 @@ #define HOP4_SHIFT 12 #define PTE_PHYS_ADDR_SHIFT 12 -#define PTE_PHYS_ADDR_MASK ~0xFFF +#define PTE_PHYS_ADDR_MASK ~OFFSET_MASK #define HL_PTE_SIZE sizeof(u64) #define HOP_TABLE_SIZE PAGE_SIZE_4KB |