[PATCH v6 4/6] iommu/tegra-smmu: Use swgrp pointer instead of swgroup id

Nicolin Chen
2021-09-14T01:47:42Z

This patch changes in struct tegra_smmu_group to use swgrp
pointer instead of swgroup, as a preparational change for
the "mappings" debugfs feature.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
drivers/iommu/tegra-smmu.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 0f3883045ffa..8fd4985ac91e 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -23,8 +23,8 @@ struct tegra_smmu_group {
struct list_head list;
struct tegra_smmu *smmu;
const struct tegra_smmu_group_soc *group_soc;
+ const struct tegra_smmu_swgroup *swgrp;
struct iommu_group *grp;
- unsigned int swgroup;
};

struct tegra_smmu {
@@ -897,18 +897,22 @@ static struct iommu_group *tegra_smmu_device_group(struct device *dev)
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct tegra_smmu *smmu = dev_iommu_priv_get(dev);
const struct tegra_smmu_group_soc *group_soc;
+ const struct tegra_smmu_swgroup *swgrp;
unsigned int swgroup = fwspec->ids[0];
struct tegra_smmu_group *group;
struct iommu_group *grp;

+ /* Find swgrp according to the swgroup id */
+ swgrp = tegra_smmu_find_swgrp(smmu, swgroup);
+
/* Find group_soc associating with swgroup */
group_soc = tegra_smmu_find_group_soc(smmu, swgroup);

mutex_lock(&smmu->lock);

- /* Find existing iommu_group associating with swgroup or group_soc */
+ /* Find existing iommu_group associating with swgrp or group_soc */
list_for_each_entry(group, &smmu->groups, list)
- if ((group->swgroup == swgroup) ||
+ if ((swgrp && group->swgrp == swgrp) ||
(group_soc && group->group_soc == group_soc)) {
grp = iommu_group_ref_get(group->grp);
mutex_unlock(&smmu->lock);
@@ -923,7 +927,7 @@ static struct iommu_group *tegra_smmu_device_group(struct device *dev)

INIT_LIST_HEAD(&group->list);
group->group_soc = group_soc;
- group->swgroup = swgroup;
+ group->swgrp = swgrp;
group->smmu = smmu;

if (dev_is_pci(dev))
--
2.17.1