On Mon, Mar 6, 2017 at 10:02 PM, Robin Murphy wrote:
> On 06/03/17 12:57, Sunil Kovvuri wrote:
We are seeing a 0.75Mpps drop with IP forwarding rate due to that.
Hence I have restricted calling DMA interfaces to only when IOMMU is
enabled.
>>>
>>> What's 0.07Mpps as a percenta
On 06/03/17 12:57, Sunil Kovvuri wrote:
>>>
>>> We are seeing a 0.75Mpps drop with IP forwarding rate due to that.
>>> Hence I have restricted calling DMA interfaces to only when IOMMU is
>>> enabled.
>>
>> What's 0.07Mpps as a percentage of baseline? On a correctly configured
>> coherent arm64 sy
>>
>> We are seeing a 0.75Mpps drop with IP forwarding rate due to that.
>> Hence I have restricted calling DMA interfaces to only when IOMMU is enabled.
>
> What's 0.07Mpps as a percentage of baseline? On a correctly configured
> coherent arm64 system, in the absence of an IOMMU, dma_map_*() is
>
On 04/03/17 05:54, Sunil Kovvuri wrote:
> On Fri, Mar 3, 2017 at 11:26 PM, David Miller wrote:
>> From: sunil.kovv...@gmail.com
>> Date: Fri, 3 Mar 2017 16:17:47 +0530
>>
>>> @@ -1643,6 +1650,9 @@ static int nicvf_probe(struct pci_dev *pdev, const
>>> struct pci_device_id *ent)
>>> if (!pa
On Fri, Mar 3, 2017 at 11:26 PM, David Miller wrote:
> From: sunil.kovv...@gmail.com
> Date: Fri, 3 Mar 2017 16:17:47 +0530
>
>> @@ -1643,6 +1650,9 @@ static int nicvf_probe(struct pci_dev *pdev, const
>> struct pci_device_id *ent)
>> if (!pass1_silicon(nic->pdev))
>> nic->hw
From: sunil.kovv...@gmail.com
Date: Fri, 3 Mar 2017 16:17:47 +0530
> @@ -1643,6 +1650,9 @@ static int nicvf_probe(struct pci_dev *pdev, const
> struct pci_device_id *ent)
> if (!pass1_silicon(nic->pdev))
> nic->hw_tso = true;
>
> + /* Check if we are attached to IOMMU *
From: Sunil Goutham
ACPI support has been added to ARM IOMMU driver in 4.10
kernel and that has resulted in VNIC interfaces throwing
translation faults when kernel is booted with ACPI as
driver was not using DMA API.
On T88 HW takes care of data coherency when performing
DMA operations hence in
