[PATCHv4] drm/amdgpu: Update invalid PTE flag setting
Mukul Joshi
mukul.joshi at amd.com
Mon Jun 19 17:38:25 UTC 2023
Update the invalid PTE flag setting with TF enabled.
This is to ensure, in addition to transitioning the
retry fault to a no-retry fault, it also causes the
wavefront to enter the trap handler. With the current
setting, the fault only transitions to a no-retry fault.
Additionally, have 2 sets of invalid PTE settings, one for
TF enabled, the other for TF disabled. The setting with
TF disabled, doesn't work with TF enabled.
Signed-off-by: Mukul Joshi <mukul.joshi at amd.com>
---
v1->v2:
- Update handling according to Christian's feedback.
v2->v3:
- Remove ASIC specific callback (Felix).
v3->v4:
- Add noretry flag to amdgpu->gmc. This allows to set
ASIC specific flags.
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h | 2 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 6 +++++
drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c | 31 +++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c | 1 +
drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c | 1 +
drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 1 +
drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c | 1 +
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 1 +
9 files changed, 45 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
index 56d73fade568..fdc25cd559b6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
@@ -331,6 +331,8 @@ struct amdgpu_gmc {
u64 VM_CONTEXT_PAGE_TABLE_END_ADDR_LO32[16];
u64 VM_CONTEXT_PAGE_TABLE_END_ADDR_HI32[16];
u64 MC_VM_MX_L1_TLB_CNTL;
+
+ u64 noretry_flags;
};
#define amdgpu_gmc_flush_gpu_tlb(adev, vmid, vmhub, type) ((adev)->gmc.gmc_funcs->flush_gpu_tlb((adev), (vmid), (vmhub), (type)))
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index eff73c428b12..8c7861a4d75d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2604,7 +2604,7 @@ bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
/* Intentionally setting invalid PTE flag
* combination to force a no-retry-fault
*/
- flags = AMDGPU_PTE_SNOOPED | AMDGPU_PTE_PRT;
+ flags = AMDGPU_VM_NORETRY_FLAGS;
value = 0;
} else if (amdgpu_vm_fault_stop == AMDGPU_VM_FAULT_STOP_NEVER) {
/* Redirect the access to the dummy page */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 9c85d494f2a2..b81fcb962d8f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -84,7 +84,13 @@ struct amdgpu_mem_stats;
/* PDE Block Fragment Size for VEGA10 */
#define AMDGPU_PDE_BFS(a) ((uint64_t)a << 59)
+/* Flag combination to set no-retry with TF disabled */
+#define AMDGPU_VM_NORETRY_FLAGS (AMDGPU_PTE_EXECUTABLE | AMDGPU_PDE_PTE | \
+ AMDGPU_PTE_TF)
+/* Flag combination to set no-retry with TF enabled */
+#define AMDGPU_VM_NORETRY_FLAGS_TF (AMDGPU_PTE_VALID | AMDGPU_PTE_SYSTEM | \
+ AMDGPU_PTE_PRT)
/* For GFX9 */
#define AMDGPU_PTE_MTYPE_VG10(a) ((uint64_t)(a) << 57)
#define AMDGPU_PTE_MTYPE_VG10_MASK AMDGPU_PTE_MTYPE_VG10(3ULL)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
index dea1a64be44d..24ddf6a0512a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
@@ -778,6 +778,27 @@ int amdgpu_vm_pde_update(struct amdgpu_vm_update_params *params,
1, 0, flags);
}
+/**
+ * amdgpu_vm_pte_update_noretry_flags - Update PTE no-retry flags
+ *
+ * @adev - amdgpu_device pointer
+ * @flags: pointer to PTE flags
+ *
+ * Update PTE no-retry flags when TF is enabled.
+ */
+static void amdgpu_vm_pte_update_noretry_flags(struct amdgpu_device *adev,
+ uint64_t *flags)
+{
+ /*
+ * Update no-retry flags with the corresponding TF
+ * no-retry combination.
+ */
+ if ((*flags & AMDGPU_VM_NORETRY_FLAGS) == AMDGPU_VM_NORETRY_FLAGS) {
+ *flags &= ~AMDGPU_VM_NORETRY_FLAGS;
+ *flags |= adev->gmc.noretry_flags;
+ }
+}
+
/*
* amdgpu_vm_pte_update_flags - figure out flags for PTE updates
*
@@ -804,6 +825,16 @@ static void amdgpu_vm_pte_update_flags(struct amdgpu_vm_update_params *params,
flags |= AMDGPU_PTE_EXECUTABLE;
}
+ /*
+ * Update no-retry flags to use the no-retry flag combination
+ * with TF enabled. The AMDGPU_VM_NORETRY_FLAGS flag combination
+ * does not work when TF is enabled. So, replace them with
+ * AMDGPU_VM_NORETRY_FLAGS_TF flag combination which works for
+ * all cases.
+ */
+ if (level == AMDGPU_VM_PTB)
+ amdgpu_vm_pte_update_noretry_flags(adev, &flags);
+
/* APUs mapping system memory may need different MTYPEs on different
* NUMA nodes. Only do this for contiguous ranges that can be assumed
* to be on the same NUMA node.
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
index 0c8a47989576..13b89f78d07d 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
@@ -751,6 +751,7 @@ static int gmc_v10_0_early_init(void *handle)
adev->gmc.private_aperture_start = 0x1000000000000000ULL;
adev->gmc.private_aperture_end =
adev->gmc.private_aperture_start + (4ULL << 30) - 1;
+ adev->gmc.noretry_flags = AMDGPU_VM_NORETRY_FLAGS_TF;
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
index c571f0d95994..c68ecb7dfa39 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
@@ -651,6 +651,7 @@ static int gmc_v11_0_early_init(void *handle)
adev->gmc.private_aperture_start = 0x1000000000000000ULL;
adev->gmc.private_aperture_end =
adev->gmc.private_aperture_start + (4ULL << 30) - 1;
+ adev->gmc.noretry_flags = AMDGPU_VM_NORETRY_FLAGS_TF;
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
index acd2b407860f..027b14603037 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
@@ -942,6 +942,7 @@ static int gmc_v7_0_early_init(void *handle)
adev->gmc.shared_aperture_end + 1;
adev->gmc.private_aperture_end =
adev->gmc.private_aperture_start + (4ULL << 30) - 1;
+ adev->gmc.noretry_flags = AMDGPU_VM_NORETRY_FLAGS_TF;
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index 85dead2a5702..581ed922dbe3 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -1056,6 +1056,7 @@ static int gmc_v8_0_early_init(void *handle)
adev->gmc.shared_aperture_end + 1;
adev->gmc.private_aperture_end =
adev->gmc.private_aperture_start + (4ULL << 30) - 1;
+ adev->gmc.noretry_flags = AMDGPU_VM_NORETRY_FLAGS_TF;
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 67e669e0141c..ebdbc823fae3 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1622,6 +1622,7 @@ static int gmc_v9_0_early_init(void *handle)
adev->gmc.private_aperture_start = 0x1000000000000000ULL;
adev->gmc.private_aperture_end =
adev->gmc.private_aperture_start + (4ULL << 30) - 1;
+ adev->gmc.noretry_flags = AMDGPU_VM_NORETRY_FLAGS_TF;
return 0;
}
--
2.35.1
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