Commit 2b7032bc authored by Xingang Wang's avatar Xingang Wang Committed by Yang Yingliang
Browse files

iommu/arm-smmu-v3: Add support to get SMMU mpam configuration 

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I49RB2


CVE: NA

-------------------------------------------------

Add interface to get mpam configuration of CD/STE context, use s1mpam
to indicate whether partid and pmg from CD or STE.

Signed-off-by: default avatarXingang Wang <wangxingang5@huawei.com>
Reviewed-by: default avatarYingtai Xie <xieyingtai@huawei.com>
Reviewed-by: default avatarZhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
parent 7c01a111

drivers/iommu/arm-smmu-v3-context.c

+17 −0
Original line number Diff line number Diff line
@@ -588,6 +588,23 @@ int arm_smmu_set_cd_mpam(struct iommu_pasid_table_ops *ops, 
	return 0;

}



int arm_smmu_get_cd_mpam(struct iommu_pasid_table_ops *ops,

		int ssid, int *partid, int *pmg)

{

	struct arm_smmu_cd_tables *tbl = pasid_ops_to_tables(ops);

	u64 val;

	__le64 *cdptr = arm_smmu_get_cd_ptr(tbl, ssid);



	if (!cdptr)

		return -ENOMEM;



	val = le64_to_cpu(cdptr[5]);

	*partid = FIELD_GET(CTXDESC_CD_5_PARTID_MASK, val);

	*pmg = FIELD_GET(CTXDESC_CD_5_PMG_MASK, val);



	return 0;

}



static void arm_smmu_clear_cd(struct iommu_pasid_table_ops *ops, int pasid,

			      struct iommu_pasid_entry *entry)

{

drivers/iommu/arm-smmu-v3.c

+71 −0
Original line number Diff line number Diff line
@@ -4194,9 +4194,38 @@ static int arm_smmu_set_ste_mpam(struct arm_smmu_device *smmu, 
	return 0;

}



static int arm_smmu_get_ste_mpam(struct arm_smmu_device *smmu,

		int sid, int *partid, int *pmg, int *s1mpam)

{

	u64 val;

	__le64 *ste;



	if (!arm_smmu_sid_in_range(smmu, sid))

		return -ERANGE;



	/* get ste ptr */

	ste = arm_smmu_get_step_for_sid(smmu, sid);



	val = le64_to_cpu(ste[1]);

	*s1mpam = FIELD_GET(STRTAB_STE_1_S1MPAM, val);

	if (*s1mpam)

		return 0;



	val = le64_to_cpu(ste[4]);

	*partid = FIELD_GET(STRTAB_STE_4_PARTID_MASK, val);



	val = le64_to_cpu(ste[5]);

	*pmg = FIELD_GET(STRTAB_STE_5_PMG_MASK, val);



	return 0;

}



int arm_smmu_set_cd_mpam(struct iommu_pasid_table_ops *ops,

			 int ssid, int partid, int pmg);



int arm_smmu_get_cd_mpam(struct iommu_pasid_table_ops *ops,

		int ssid, int *partid, int *pmg);



static int arm_smmu_set_mpam(struct arm_smmu_device *smmu,

		int sid, int ssid, int partid, int pmg, int s1mpam)

{
@@ -4275,6 +4304,48 @@ int arm_smmu_set_dev_mpam(struct device *dev, int ssid, int partid, int pmg, 
}

EXPORT_SYMBOL(arm_smmu_set_dev_mpam);



static int arm_smmu_get_mpam(struct arm_smmu_device *smmu,

		int sid, int ssid, int *partid, int *pmg, int *s1mpam)

{

	struct arm_smmu_master_data *master = arm_smmu_find_master(smmu, sid);

	struct arm_smmu_s1_cfg *cfg = master ? master->ste.s1_cfg : NULL;

	int ret;



	if (!(smmu->features & ARM_SMMU_FEAT_MPAM))

		return -ENODEV;



	ret = arm_smmu_get_ste_mpam(smmu, sid, partid, pmg, s1mpam);

	if (ret)

		return ret;



	/* return STE mpam configuration when s1mpam == 0 */

	if (!(*s1mpam))

		return 0;



	if (WARN_ON(!cfg))

		return -EINVAL;



	if (WARN_ON(ssid >= (1 << master->ssid_bits)))

		return -E2BIG;



	return arm_smmu_get_cd_mpam(cfg->ops, ssid, partid, pmg);

}



/**

 * arm_smmu_get_dev_mpam() - get mpam configuration

 * @dev: the device

 */

int arm_smmu_get_dev_mpam(struct device *dev, int ssid, int *partid, int *pmg,

		int *s1mpam)

{

	struct arm_smmu_master_data *master = dev->iommu_fwspec->iommu_priv;

	struct arm_smmu_device *smmu = master->domain->smmu;

	int sid = master->streams->id;



	return arm_smmu_get_mpam(smmu, sid, ssid, partid, pmg, s1mpam);

}

EXPORT_SYMBOL(arm_smmu_get_dev_mpam);



static int arm_smmu_device_probe(struct platform_device *pdev)

{

	int irq, ret;

include/linux/ascend_smmu.h

+3 −0
Original line number Diff line number Diff line
@@ -6,4 +6,7 @@ 
extern int arm_smmu_set_dev_mpam(struct device *dev, int ssid, int partid,

		int pmg, int s1mpam);



extern int arm_smmu_get_dev_mpam(struct device *dev, int ssid, int *partid,

		int *pmg, int *s1mpam);



#endif /* __LINUX_ASCEND_SMMU_H */