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authorLongfang Liu2020-03-05 10:06:23 +0800
committerHerbert Xu2020-03-12 23:00:14 +1100
commit8824bc5ed1e7fbc23529c9b2e799bb9414cb6e52 (patch)
treebe973878b6f476172a10ad772e9aa873c54efce1 /drivers/crypto/hisilicon
parenta13c97118749954a9f47a3b5fc47457baf664f2d (diff)
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 <liulongfang@huawei.com> Signed-off-by: Zaibo Xu <xuzaibo@huawei.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/hisilicon')
-rw-r--r--drivers/crypto/hisilicon/sec2/sec.h1
-rw-r--r--drivers/crypto/hisilicon/sec2/sec_main.c19
2 files changed, 20 insertions, 0 deletions
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 <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>
@@ -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;