From 8824bc5ed1e7fbc23529c9b2e799bb9414cb6e52 Mon Sep 17 00:00:00 2001
From: Longfang Liu <liulongfang@huawei.com>
Date: Thu, 5 Mar 2020 10:06:23 +0800
Subject: 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>
---
drivers/crypto/hisilicon/sec2/sec.h | 1 +
drivers/crypto/hisilicon/sec2/sec_main.c | 19 +++++++++++++++++++
2 files changed, 20 insertions(+)
(limited to 'drivers/crypto')
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;
--
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