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
> 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;
>
