From: Yicong Yang <yangyicong@huawei.com>
To: John Garry <john.garry@huawei.com>,
Yicong Yang <yangyicong@hisilicon.com>,
<gregkh@linuxfoundation.org>, <helgaas@kernel.org>,
<alexander.shishkin@linux.intel.com>, <lorenzo.pieralisi@arm.com>,
<will@kernel.org>, <mark.rutland@arm.com>,
<mathieu.poirier@linaro.org>, <suzuki.poulose@arm.com>,
<mike.leach@linaro.org>, <leo.yan@linaro.org>,
<jonathan.cameron@huawei.com>, <daniel.thompson@linaro.org>,
<joro@8bytes.org>, <shameerali.kolothum.thodi@huawei.com>,
<robin.murphy@arm.com>, <peterz@infradead.org>,
<mingo@redhat.com>, <acme@kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<coresight@lists.linaro.org>, <linux-pci@vger.kernel.org>,
<linux-perf-users@vger.kernel.org>,
<iommu@lists.linux-foundation.org>
Cc: <prime.zeng@huawei.com>, <liuqi115@huawei.com>,
<zhangshaokun@hisilicon.com>, <linuxarm@huawei.com>,
<song.bao.hua@hisilicon.com>
Subject: Re: [PATCH v5 1/8] iommu/arm-smmu-v3: Make default domain type of HiSilicon PTT device to identity
Date: Wed, 16 Mar 2022 14:15:48 +0800 [thread overview]
Message-ID: <e6d50ab3-5284-7fea-c20e-d72add9b0c82@huawei.com> (raw)
In-Reply-To: <162a116a-4b0f-c58b-6760-86d10ecf543f@huawei.com>
On 2022/3/12 1:27, John Garry wrote:
> On 08/03/2022 08:49, Yicong Yang wrote:
>> The DMA of HiSilicon PTT device can only work with identical mapping.
>
> nit: I'd have "DMA operations of the HiSilicon PTT device can only work properly with identity mappings".
>
>> So add a quirk for the device to force the domain passthrough.
>
> ".. domain as passthrough."
>
thanks for the comments. will refine the commit as suggested.
>>
>> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
>> ---
>> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 16 ++++++++++++++++
>> 1 file changed, 16 insertions(+)
>>
>> diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
>> index 6dc6d8b6b368..6f67a2b1dd27 100644
>> --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
>> +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
>> @@ -2838,6 +2838,21 @@ static int arm_smmu_dev_disable_feature(struct device *dev,
>> }
>> }
>> +#define IS_HISI_PTT_DEVICE(pdev) ((pdev)->vendor == PCI_VENDOR_ID_HUAWEI && \
>> + (pdev)->device == 0xa12e)
>> +
>> +static int arm_smmu_def_domain_type(struct device *dev)
>> +{
>> + if (dev_is_pci(dev)) {
>> + struct pci_dev *pdev = to_pci_dev(dev);
>> +
>> + if (IS_HISI_PTT_DEVICE(pdev))
>> + return IOMMU_DOMAIN_IDENTITY;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> static struct iommu_ops arm_smmu_ops = {
>> .capable = arm_smmu_capable,
>> .domain_alloc = arm_smmu_domain_alloc,
>> @@ -2863,6 +2878,7 @@ static struct iommu_ops arm_smmu_ops = {
>> .sva_unbind = arm_smmu_sva_unbind,
>> .sva_get_pasid = arm_smmu_sva_get_pasid,
>> .page_response = arm_smmu_page_response,
>> + .def_domain_type = arm_smmu_def_domain_type,
>> .pgsize_bitmap = -1UL, /* Restricted during device attach */
>> .owner = THIS_MODULE,
>> };
>
> .
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next prev parent reply other threads:[~2022-03-16 6:17 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-08 8:49 [PATCH v5 0/8] Add support for HiSilicon PCIe Tune and Trace device Yicong Yang
2022-03-08 8:49 ` [PATCH v5 1/8] iommu/arm-smmu-v3: Make default domain type of HiSilicon PTT device to identity Yicong Yang
2022-03-11 17:27 ` John Garry
2022-03-16 6:15 ` Yicong Yang [this message]
2022-03-08 8:49 ` [PATCH v5 2/8] hwtracing: Add trace function support for HiSilicon PCIe Tune and Trace device Yicong Yang
2022-03-11 17:55 ` John Garry
2022-03-16 7:49 ` Yicong Yang
2022-03-08 8:49 ` [PATCH v5 3/8] hisi_ptt: Register PMU device for PTT trace Yicong Yang
2022-03-08 10:21 ` Jonathan Cameron
2022-03-08 11:13 ` Yicong Yang
2022-03-08 12:06 ` Jonathan Cameron
2022-03-08 13:20 ` Yicong Yang
2022-03-08 8:49 ` [PATCH v5 4/8] hisi_ptt: Add support for dynamically updating the filter list Yicong Yang
2022-03-08 10:23 ` Jonathan Cameron
2022-03-08 8:49 ` [PATCH v5 5/8] hisi_ptt: Add tune function support for HiSilicon PCIe Tune and Trace device Yicong Yang
2022-03-08 8:49 ` [PATCH v5 6/8] perf tool: Add support for HiSilicon PCIe Tune and Trace device driver Yicong Yang
2022-03-08 8:49 ` [PATCH v5 7/8] docs: Add HiSilicon PTT device driver documentation Yicong Yang
2022-03-08 8:49 ` [PATCH v5 8/8] MAINTAINERS: Add maintainer for HiSilicon PTT driver Yicong Yang
2022-03-08 10:32 ` Jonathan Cameron
2022-03-08 11:49 ` Yicong Yang
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