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drm/radeon/cik: stop page faults from hanging the system (v2) 

Redirect invalid memory accesses to the default page
instead of locking up the memory controller.

v2: rebase on top of 2 level PTs

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2012-09-18 16:06:01 -04:00
parent 1c49165d0a
commit a00024b03d
2 changed files with 24 additions and 2 deletions
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15
drivers/gpu/drm/radeon/cik.c
View File

@ -1608,9 +1608,20 @@ static int cik_pcie_gart_enable(struct radeon_device *rdev)
/* enable context1-15 */
WREG32(VM_CONTEXT1_PROTECTION_FAULT_DEFAULT_ADDR,
(u32)(rdev->dummy_page.addr >> 12));
WREG32(VM_CONTEXT1_CNTL2, 0);
WREG32(VM_CONTEXT1_CNTL2, 4);
WREG32(VM_CONTEXT1_CNTL, ENABLE_CONTEXT | PAGE_TABLE_DEPTH(1) |
RANGE_PROTECTION_FAULT_ENABLE_DEFAULT);
RANGE_PROTECTION_FAULT_ENABLE_INTERRUPT |
RANGE_PROTECTION_FAULT_ENABLE_DEFAULT |
DUMMY_PAGE_PROTECTION_FAULT_ENABLE_INTERRUPT |
DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT |
PDE0_PROTECTION_FAULT_ENABLE_INTERRUPT |
PDE0_PROTECTION_FAULT_ENABLE_DEFAULT |
VALID_PROTECTION_FAULT_ENABLE_INTERRUPT |
VALID_PROTECTION_FAULT_ENABLE_DEFAULT |
READ_PROTECTION_FAULT_ENABLE_INTERRUPT |
READ_PROTECTION_FAULT_ENABLE_DEFAULT |
WRITE_PROTECTION_FAULT_ENABLE_INTERRUPT |
WRITE_PROTECTION_FAULT_ENABLE_DEFAULT);
/* TC cache setup ??? */
WREG32(TC_CFG_L1_LOAD_POLICY0, 0);

11
drivers/gpu/drm/radeon/cikd.h
View File

@ -68,7 +68,18 @@
#define VM_CONTEXT0_CNTL 0x1410
#define ENABLE_CONTEXT (1 << 0)
#define PAGE_TABLE_DEPTH(x) (((x) & 3) << 1)
#define RANGE_PROTECTION_FAULT_ENABLE_INTERRUPT (1 << 3)
#define RANGE_PROTECTION_FAULT_ENABLE_DEFAULT (1 << 4)
#define DUMMY_PAGE_PROTECTION_FAULT_ENABLE_INTERRUPT (1 << 6)
#define DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT (1 << 7)
#define PDE0_PROTECTION_FAULT_ENABLE_INTERRUPT (1 << 9)
#define PDE0_PROTECTION_FAULT_ENABLE_DEFAULT (1 << 10)
#define VALID_PROTECTION_FAULT_ENABLE_INTERRUPT (1 << 12)
#define VALID_PROTECTION_FAULT_ENABLE_DEFAULT (1 << 13)
#define READ_PROTECTION_FAULT_ENABLE_INTERRUPT (1 << 15)
#define READ_PROTECTION_FAULT_ENABLE_DEFAULT (1 << 16)
#define WRITE_PROTECTION_FAULT_ENABLE_INTERRUPT (1 << 18)
#define WRITE_PROTECTION_FAULT_ENABLE_DEFAULT (1 << 19)
#define VM_CONTEXT1_CNTL 0x1414
#define VM_CONTEXT0_CNTL2 0x1430
#define VM_CONTEXT1_CNTL2 0x1434