Commit 8824bc5e authored by Longfang Liu's avatar Longfang Liu Committed by Herbert Xu
Browse files

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: default avatarLongfang Liu <liulongfang@huawei.com>
Signed-off-by: default avatarZaibo Xu <xuzaibo@huawei.com>
Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent a13c9711

drivers/crypto/hisilicon/sec2/sec.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

};

drivers/crypto/hisilicon/sec2/sec_main.c

+19 −0
Original line number Diff line number Diff line
@@ -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;