On 2020/3/2 19:54, Jonathan Cameron wrote:
> On Mon, 2 Mar 2020 14:15:14 +0800
> Zaibo Xu <xuzaibo@xxxxxxxxxx> wrote:
>
>> From: liulongfang <liulongfang@xxxxxxxxxx>
>>
>> In order to improve performance of small packets (<512Bytes)
>> in SMMU translation scenario,We need to identify the type of IOMMU
nit: space after ','. and We -> we for lower case?
>> in the SEC probe to process small packets by a different method.
>>
>> Signed-off-by: liulongfang <liulongfang@xxxxxxxxxx>
>> Reviewed-by: Zaibo Xu <xuzaibo@xxxxxxxxxx>
>
> This looks like what we ended up with for the SECv1 driver.
>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
>> ---
>> drivers/crypto/hisilicon/sec2/sec.h | 1 +
>> drivers/crypto/hisilicon/sec2/sec_main.c | 19 +++++++++++++++++++
>> 2 files changed, 20 insertions(+)
>>
>> diff --git a/drivers/crypto/hisilicon/sec2/sec.h b/drivers/crypto/hisilicon/sec2/sec.h
>> index 13e2d8d..eab0d22 100644
>> --- a/drivers/crypto/hisilicon/sec2/sec.h
>> +++ b/drivers/crypto/hisilicon/sec2/sec.h
>> @@ -165,6 +165,7 @@ struct sec_dev {
>> struct list_head list;
>> struct sec_debug debug;
>> u32 ctx_q_num;
>> + bool iommu_used;
>> u32 num_vfs;
>> unsigned long status;
>> };
>> diff --git a/drivers/crypto/hisilicon/sec2/sec_main.c b/drivers/crypto/hisilicon/sec2/sec_main.c
>> index ebafc1c..6466d90 100644
>> --- a/drivers/crypto/hisilicon/sec2/sec_main.c
>> +++ b/drivers/crypto/hisilicon/sec2/sec_main.c
>> @@ -7,6 +7,7 @@
>> #include <linux/debugfs.h>
>> #include <linux/init.h>
>> #include <linux/io.h>
>> +#include <linux/iommu.h>
>> #include <linux/kernel.h>
>> #include <linux/module.h>
>> #include <linux/pci.h>
>> @@ -826,6 +827,23 @@ static void sec_probe_uninit(struct hisi_qm *qm)
>> destroy_workqueue(qm->wq);
>> }
>>
>> +static void sec_iommu_used_check(struct sec_dev *sec)
>> +{
>> + struct iommu_domain *domain;
>> + struct device *dev = &sec->qm.pdev->dev;
>> +
>> + domain = iommu_get_domain_for_dev(dev);
>> +
>> + /* Check if iommu is used */
>> + sec->iommu_used = false;
>> + if (domain) {
>> + if (domain->type & __IOMMU_DOMAIN_PAGING)
>> + sec->iommu_used = true;
>> + dev_info(dev, "SMMU Opened, the iommu type = %u\n",
>> + domain->type);
>> + }
>> +}
>> +
>> static int sec_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>> {
>> struct sec_dev *sec;
>> @@ -839,6 +857,7 @@ static int sec_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>> pci_set_drvdata(pdev, sec);
>>
>> sec->ctx_q_num = ctx_q_num;
>> + sec_iommu_used_check(sec);
>>
>> qm = &sec->qm;
>>
>
>
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