diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/vega10_ih.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/vega10_ih.c | 78 |
1 files changed, 77 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c index eda4771e273f..dd6af2176d3e 100644 --- a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c +++ b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c @@ -235,8 +235,73 @@ static u32 vega10_ih_get_wptr(struct amdgpu_device *adev) */ static bool vega10_ih_prescreen_iv(struct amdgpu_device *adev) { - /* TODO: Filter known pending page faults */ + u32 ring_index = adev->irq.ih.rptr >> 2; + u32 dw0, dw3, dw4, dw5; + u16 pasid; + u64 addr, key; + struct amdgpu_vm *vm; + int r; + + dw0 = le32_to_cpu(adev->irq.ih.ring[ring_index + 0]); + dw3 = le32_to_cpu(adev->irq.ih.ring[ring_index + 3]); + dw4 = le32_to_cpu(adev->irq.ih.ring[ring_index + 4]); + dw5 = le32_to_cpu(adev->irq.ih.ring[ring_index + 5]); + + /* Filter retry page faults, let only the first one pass. If + * there are too many outstanding faults, ignore them until + * some faults get cleared. + */ + switch (dw0 & 0xff) { + case AMDGPU_IH_CLIENTID_VMC: + case AMDGPU_IH_CLIENTID_UTCL2: + break; + default: + /* Not a VM fault */ + return true; + } + + /* Not a retry fault */ + if (!(dw5 & 0x80)) + return true; + + pasid = dw3 & 0xffff; + /* No PASID, can't identify faulting process */ + if (!pasid) + return true; + + addr = ((u64)(dw5 & 0xf) << 44) | ((u64)dw4 << 12); + key = AMDGPU_VM_FAULT(pasid, addr); + r = amdgpu_ih_add_fault(adev, key); + + /* Hash table is full or the fault is already being processed, + * ignore further page faults + */ + if (r != 0) + goto ignore_iv; + + /* Track retry faults in per-VM fault FIFO. */ + spin_lock(&adev->vm_manager.pasid_lock); + vm = idr_find(&adev->vm_manager.pasid_idr, pasid); + spin_unlock(&adev->vm_manager.pasid_lock); + if (WARN_ON_ONCE(!vm)) { + /* VM not found, process it normally */ + amdgpu_ih_clear_fault(adev, key); + return true; + } + /* No locking required with single writer and single reader */ + r = kfifo_put(&vm->faults, key); + if (!r) { + /* FIFO is full. Ignore it until there is space */ + amdgpu_ih_clear_fault(adev, key); + goto ignore_iv; + } + + /* It's the first fault for this address, process it normally */ return true; + +ignore_iv: + adev->irq.ih.rptr += 32; + return false; } /** @@ -323,6 +388,14 @@ static int vega10_ih_sw_init(void *handle) adev->irq.ih.use_doorbell = true; adev->irq.ih.doorbell_index = AMDGPU_DOORBELL64_IH << 1; + adev->irq.ih.faults = kmalloc(sizeof(*adev->irq.ih.faults), GFP_KERNEL); + if (!adev->irq.ih.faults) + return -ENOMEM; + INIT_CHASH_TABLE(adev->irq.ih.faults->hash, + AMDGPU_PAGEFAULT_HASH_BITS, 8, 0); + spin_lock_init(&adev->irq.ih.faults->lock); + adev->irq.ih.faults->count = 0; + r = amdgpu_irq_init(adev); return r; @@ -335,6 +408,9 @@ static int vega10_ih_sw_fini(void *handle) amdgpu_irq_fini(adev); amdgpu_ih_ring_fini(adev); + kfree(adev->irq.ih.faults); + adev->irq.ih.faults = NULL; + return 0; } |