[PATCH 13/15] iommu/qcom: Use accessor functions for iommu private data

Joerg Roedel
2020-03-10T09:12:27Z

From: Joerg Roedel <jroedel@suse.de>

Make use of dev_iommu_priv_set/get() functions.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/qcom_iommu.c | 61 ++++++++++++++++++++++----------------
1 file changed, 36 insertions(+), 25 deletions(-)

diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c
index 4328da0b0a9f..80147f82d427 100644
--- a/drivers/iommu/qcom_iommu.c
+++ b/drivers/iommu/qcom_iommu.c
@@ -74,16 +74,19 @@ static struct qcom_iommu_domain *to_qcom_iommu_domain(struct iommu_domain *dom)

static const struct iommu_ops qcom_iommu_ops;

-static struct qcom_iommu_dev * to_iommu(struct iommu_fwspec *fwspec)
+static struct qcom_iommu_dev * to_iommu(struct device *dev)
{
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+
if (!fwspec || fwspec->ops != &qcom_iommu_ops)
return NULL;
- return fwspec->iommu_priv;
+
+ return dev_iommu_priv_get(dev);
}

-static struct qcom_iommu_ctx * to_ctx(struct iommu_fwspec *fwspec, unsigned asid)
+static struct qcom_iommu_ctx * to_ctx(struct device *dev, unsigned asid)
{
- struct qcom_iommu_dev *qcom_iommu = to_iommu(fwspec);
+ struct qcom_iommu_dev *qcom_iommu = to_iommu(dev);
if (!qcom_iommu)
return NULL;
return qcom_iommu->ctxs[asid - 1];
@@ -115,11 +118,14 @@ iommu_readq(struct qcom_iommu_ctx *ctx, unsigned reg)

static void qcom_iommu_tlb_sync(void *cookie)
{
- struct iommu_fwspec *fwspec = cookie;
+ struct iommu_fwspec *fwspec;
+ struct device *dev = cookie;
unsigned i;

+ fwspec = dev_iommu_fwspec_get(dev);
+
for (i = 0; i < fwspec->num_ids; i++) {
- struct qcom_iommu_ctx *ctx = to_ctx(fwspec, fwspec->ids[i]);
+ struct qcom_iommu_ctx *ctx = to_ctx(dev, fwspec->ids[i]);
unsigned int val, ret;

iommu_writel(ctx, ARM_SMMU_CB_TLBSYNC, 0);
@@ -133,11 +139,14 @@ static void qcom_iommu_tlb_sync(void *cookie)

static void qcom_iommu_tlb_inv_context(void *cookie)
{
- struct iommu_fwspec *fwspec = cookie;
+ struct device *dev = cookie;
+ struct iommu_fwspec *fwspec;
unsigned i;

+ fwspec = dev_iommu_fwspec_get(dev);
+
for (i = 0; i < fwspec->num_ids; i++) {
- struct qcom_iommu_ctx *ctx = to_ctx(fwspec, fwspec->ids[i]);
+ struct qcom_iommu_ctx *ctx = to_ctx(dev, fwspec->ids[i]);
iommu_writel(ctx, ARM_SMMU_CB_S1_TLBIASID, ctx->asid);
}

@@ -147,13 +156,16 @@ static void qcom_iommu_tlb_inv_context(void *cookie)
static void qcom_iommu_tlb_inv_range_nosync(unsigned long iova, size_t size,
size_t granule, bool leaf, void *cookie)
{
- struct iommu_fwspec *fwspec = cookie;
+ struct device *dev = cookie;
+ struct iommu_fwspec *fwspec;
unsigned i, reg;

reg = leaf ? ARM_SMMU_CB_S1_TLBIVAL : ARM_SMMU_CB_S1_TLBIVA;

+ fwspec = dev_iommu_fwspec_get(dev);
+
for (i = 0; i < fwspec->num_ids; i++) {
- struct qcom_iommu_ctx *ctx = to_ctx(fwspec, fwspec->ids[i]);
+ struct qcom_iommu_ctx *ctx = to_ctx(dev, fwspec->ids[i]);
size_t s = size;

iova = (iova >> 12) << 12;
@@ -222,9 +234,10 @@ static irqreturn_t qcom_iommu_fault(int irq, void *dev)

static int qcom_iommu_init_domain(struct iommu_domain *domain,
struct qcom_iommu_dev *qcom_iommu,
- struct iommu_fwspec *fwspec)
+ struct device *dev)
{
struct qcom_iommu_domain *qcom_domain = to_qcom_iommu_domain(domain);
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct io_pgtable_ops *pgtbl_ops;
struct io_pgtable_cfg pgtbl_cfg;
int i, ret = 0;
@@ -243,7 +256,7 @@ static int qcom_iommu_init_domain(struct iommu_domain *domain,
};

qcom_domain->iommu = qcom_iommu;
- pgtbl_ops = alloc_io_pgtable_ops(ARM_32_LPAE_S1, &pgtbl_cfg, fwspec);
+ pgtbl_ops = alloc_io_pgtable_ops(ARM_32_LPAE_S1, &pgtbl_cfg, dev);
if (!pgtbl_ops) {
dev_err(qcom_iommu->dev, "failed to allocate pagetable ops\n");
ret = -ENOMEM;
@@ -256,7 +269,7 @@ static int qcom_iommu_init_domain(struct iommu_domain *domain,
domain->geometry.force_aperture = true;

for (i = 0; i < fwspec->num_ids; i++) {
- struct qcom_iommu_ctx *ctx = to_ctx(fwspec, fwspec->ids[i]);
+ struct qcom_iommu_ctx *ctx = to_ctx(dev, fwspec->ids[i]);

if (!ctx->secure_init) {
ret = qcom_scm_restore_sec_cfg(qcom_iommu->sec_id, ctx->asid);
@@ -363,8 +376,7 @@ static void qcom_iommu_domain_free(struct iommu_domain *domain)

static int qcom_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
- struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
- struct qcom_iommu_dev *qcom_iommu = to_iommu(fwspec);
+ struct qcom_iommu_dev *qcom_iommu = to_iommu(dev);
struct qcom_iommu_domain *qcom_domain = to_qcom_iommu_domain(domain);
int ret;

@@ -375,7 +387,7 @@ static int qcom_iommu_attach_dev(struct iommu_domain *domain, struct device *dev

/* Ensure that the domain is finalized */
pm_runtime_get_sync(qcom_iommu->dev);
- ret = qcom_iommu_init_domain(domain, qcom_iommu, fwspec);
+ ret = qcom_iommu_init_domain(domain, qcom_iommu, dev);
pm_runtime_put_sync(qcom_iommu->dev);
if (ret < 0)
return ret;
@@ -397,9 +409,9 @@ static int qcom_iommu_attach_dev(struct iommu_domain *domain, struct device *dev

static void qcom_iommu_detach_dev(struct iommu_domain *domain, struct device *dev)
{
- struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
- struct qcom_iommu_dev *qcom_iommu = to_iommu(fwspec);
struct qcom_iommu_domain *qcom_domain = to_qcom_iommu_domain(domain);
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+ struct qcom_iommu_dev *qcom_iommu = to_iommu(dev);
unsigned i;

if (WARN_ON(!qcom_domain->iommu))
@@ -407,7 +419,7 @@ static void qcom_iommu_detach_dev(struct iommu_domain *domain, struct device *de

pm_runtime_get_sync(qcom_iommu->dev);
for (i = 0; i < fwspec->num_ids; i++) {
- struct qcom_iommu_ctx *ctx = to_ctx(fwspec, fwspec->ids[i]);
+ struct qcom_iommu_ctx *ctx = to_ctx(dev, fwspec->ids[i]);

/* Disable the context bank: */
iommu_writel(ctx, ARM_SMMU_CB_SCTLR, 0);
@@ -514,7 +526,7 @@ static bool qcom_iommu_capable(enum iommu_cap cap)

static int qcom_iommu_add_device(struct device *dev)
{
- struct qcom_iommu_dev *qcom_iommu = to_iommu(dev_iommu_fwspec_get(dev));
+ struct qcom_iommu_dev *qcom_iommu = to_iommu(dev);
struct iommu_group *group;
struct device_link *link;

@@ -545,7 +557,7 @@ static int qcom_iommu_add_device(struct device *dev)

static void qcom_iommu_remove_device(struct device *dev)
{
- struct qcom_iommu_dev *qcom_iommu = to_iommu(dev_iommu_fwspec_get(dev));
+ struct qcom_iommu_dev *qcom_iommu = to_iommu(dev);

if (!qcom_iommu)
return;
@@ -557,7 +569,6 @@ static void qcom_iommu_remove_device(struct device *dev)

static int qcom_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
{
- struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct qcom_iommu_dev *qcom_iommu;
struct platform_device *iommu_pdev;
unsigned asid = args->args[0];
@@ -583,14 +594,14 @@ static int qcom_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
WARN_ON(asid > qcom_iommu->num_ctxs))
return -EINVAL;

- if (!fwspec->iommu_priv) {
- fwspec->iommu_priv = qcom_iommu;
+ if (dev_iommu_priv_get(dev)) {
+ dev_iommu_priv_set(dev, qcom_iommu);
} else {
/* make sure devices iommus dt node isn't referring to
* multiple different iommu devices. Multiple context
* banks are ok, but multiple devices are not:
*/
- if (WARN_ON(qcom_iommu != fwspec->iommu_priv))
+ if (WARN_ON(qcom_iommu != dev_iommu_priv_get(dev)))
return -EINVAL;
}

--
2.17.1