On Mon, 20 Jul 2020 at 21:21, Rob Clark <robdclark@xxxxxxxxx> wrote: > > From: Rob Clark <robdclark@xxxxxxxxxxxx> > > The device may be torn down, but the domain should still be valid. Lets > use that as the tlb flush ops cookie. > > Fixes a problem reported in [1] This proposed fix patch applied on top of linux mainline master and boot test PASS on db410c. The reported problem got fixed. > > [1] https://lkml.org/lkml/2020/7/20/104 > > Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx> Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> Tested-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> > --- > Note I don't have a good setup to test this atm, but I think it should > work. > > drivers/iommu/qcom_iommu.c | 37 +++++++++++++++++-------------------- > 1 file changed, 17 insertions(+), 20 deletions(-) > > diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c > index c3e1fbd1988c..d176df569af8 100644 > --- a/drivers/iommu/qcom_iommu.c > +++ b/drivers/iommu/qcom_iommu.c > @@ -65,6 +65,7 @@ struct qcom_iommu_domain { > struct mutex init_mutex; /* Protects iommu pointer */ > struct iommu_domain domain; > struct qcom_iommu_dev *iommu; > + struct iommu_fwspec *fwspec; > }; > > static struct qcom_iommu_domain *to_qcom_iommu_domain(struct iommu_domain *dom) > @@ -84,9 +85,9 @@ static struct qcom_iommu_dev * to_iommu(struct device *dev) > return dev_iommu_priv_get(dev); > } > > -static struct qcom_iommu_ctx * to_ctx(struct device *dev, unsigned asid) > +static struct qcom_iommu_ctx * to_ctx(struct qcom_iommu_domain *d, unsigned asid) > { > - struct qcom_iommu_dev *qcom_iommu = to_iommu(dev); > + struct qcom_iommu_dev *qcom_iommu = d->iommu; > if (!qcom_iommu) > return NULL; > return qcom_iommu->ctxs[asid - 1]; > @@ -118,14 +119,12 @@ iommu_readq(struct qcom_iommu_ctx *ctx, unsigned reg) > > static void qcom_iommu_tlb_sync(void *cookie) > { > - struct iommu_fwspec *fwspec; > - struct device *dev = cookie; > + struct qcom_iommu_domain *qcom_domain = cookie; > + struct iommu_fwspec *fwspec = qcom_domain->fwspec; > unsigned i; > > - fwspec = dev_iommu_fwspec_get(dev); > - > for (i = 0; i < fwspec->num_ids; i++) { > - struct qcom_iommu_ctx *ctx = to_ctx(dev, fwspec->ids[i]); > + struct qcom_iommu_ctx *ctx = to_ctx(qcom_domain, fwspec->ids[i]); > unsigned int val, ret; > > iommu_writel(ctx, ARM_SMMU_CB_TLBSYNC, 0); > @@ -139,14 +138,12 @@ static void qcom_iommu_tlb_sync(void *cookie) > > static void qcom_iommu_tlb_inv_context(void *cookie) > { > - struct device *dev = cookie; > - struct iommu_fwspec *fwspec; > + struct qcom_iommu_domain *qcom_domain = cookie; > + struct iommu_fwspec *fwspec = qcom_domain->fwspec; > unsigned i; > > - fwspec = dev_iommu_fwspec_get(dev); > - > for (i = 0; i < fwspec->num_ids; i++) { > - struct qcom_iommu_ctx *ctx = to_ctx(dev, fwspec->ids[i]); > + struct qcom_iommu_ctx *ctx = to_ctx(qcom_domain, fwspec->ids[i]); > iommu_writel(ctx, ARM_SMMU_CB_S1_TLBIASID, ctx->asid); > } > > @@ -156,16 +153,14 @@ 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 device *dev = cookie; > - struct iommu_fwspec *fwspec; > + struct qcom_iommu_domain *qcom_domain = cookie; > + struct iommu_fwspec *fwspec = qcom_domain->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(dev, fwspec->ids[i]); > + struct qcom_iommu_ctx *ctx = to_ctx(qcom_domain, fwspec->ids[i]); > size_t s = size; > > iova = (iova >> 12) << 12; > @@ -256,7 +251,9 @@ 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, dev); > + qcom_domain->fwspec = fwspec; > + > + pgtbl_ops = alloc_io_pgtable_ops(ARM_32_LPAE_S1, &pgtbl_cfg, qcom_domain); > if (!pgtbl_ops) { > dev_err(qcom_iommu->dev, "failed to allocate pagetable ops\n"); > ret = -ENOMEM; > @@ -269,7 +266,7 @@ 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(dev, fwspec->ids[i]); > + struct qcom_iommu_ctx *ctx = to_ctx(qcom_domain, fwspec->ids[i]); > > if (!ctx->secure_init) { > ret = qcom_scm_restore_sec_cfg(qcom_iommu->sec_id, ctx->asid); > @@ -419,7 +416,7 @@ 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(dev, fwspec->ids[i]); > + struct qcom_iommu_ctx *ctx = to_ctx(qcom_domain, fwspec->ids[i]); > > /* Disable the context bank: */ > iommu_writel(ctx, ARM_SMMU_CB_SCTLR, 0); -- Linaro LKFT https://lkft.linaro.org
