From 8824bc5ed1e7fbc23529c9b2e799bb9414cb6e52 Mon Sep 17 00:00:00 2001 From: Longfang Liu Date: Thu, 5 Mar 2020 10:06:23 +0800 Subject: [PATCH] crypto: hisilicon/sec2 - Add iommu status check 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: Longfang Liu Signed-off-by: Zaibo Xu Reviewed-by: Jonathan Cameron Signed-off-by: Herbert Xu --- 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 13e2d8d7be94..eab0d22fc57e 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 1fe2558bc22e..4f354d79fa7e 100644 --- a/drivers/crypto/hisilicon/sec2/sec_main.c +++ b/drivers/crypto/hisilicon/sec2/sec_main.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -832,6 +833,23 @@ 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; @@ -845,6 +863,7 @@ 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; -- 2.39.2