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crypto: hisilicon/sec2 - Add iommu status check

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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>
This commit is contained in:
Longfang Liu 2020-03-05 10:06:23 +08:00 committed by Herbert Xu
parent a13c971187
commit 8824bc5ed1
2 changed files with 20 additions and 0 deletions
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1
drivers/crypto/hisilicon/sec2/sec.h
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@ -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;
};

19
drivers/crypto/hisilicon/sec2/sec_main.c
View File

@ -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;