[PATCH v2 2/2] drm/msm: move domain allocation into msm_iommu_new()
Dmitry Baryshkov
dmitry.baryshkov at linaro.org
Mon Oct 24 15:14:44 UTC 2022
After the msm_iommu instance is created, the IOMMU domain is completely
handled inside the msm_iommu code. Move the iommu_domain_alloc() call
into the msm_iommu_new() to simplify callers code.
Reported-by: kernel test robot <lkp at intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
Changes since v1:
- Fixed the uninitialized variable usage in a6xx_gmu_memory_probe()
(reported by lkp)
---
drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 12 +++++-------
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 20 +++++++++-----------
drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 19 ++++++++++---------
drivers/gpu/drm/msm/msm_drv.c | 18 ++++++++----------
drivers/gpu/drm/msm/msm_iommu.c | 18 +++++++++++++++---
drivers/gpu/drm/msm/msm_mmu.h | 3 ++-
6 files changed, 49 insertions(+), 41 deletions(-)
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index e033d6a67a20..ff5444f596d0 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -1213,19 +1213,17 @@ static int a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu, struct a6xx_gmu_bo *bo,
static int a6xx_gmu_memory_probe(struct a6xx_gmu *gmu)
{
- struct iommu_domain *domain;
struct msm_mmu *mmu;
- domain = iommu_domain_alloc(&platform_bus_type);
- if (!domain)
+ mmu = msm_iommu_new(gmu->dev);
+ if (!mmu)
return -ENODEV;
+ if (IS_ERR(mmu))
+ return PTR_ERR(mmu);
- mmu = msm_iommu_new(gmu->dev, domain);
gmu->aspace = msm_gem_address_space_create(mmu, "gmu", 0x0, 0x80000000);
- if (IS_ERR(gmu->aspace)) {
- iommu_domain_free(domain);
+ if (IS_ERR(gmu->aspace))
return PTR_ERR(gmu->aspace);
- }
return 0;
}
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index ed26b8dfc789..511ade96045e 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -200,28 +200,26 @@ struct msm_gem_address_space *
adreno_iommu_create_address_space(struct msm_gpu *gpu,
struct platform_device *pdev)
{
- struct iommu_domain *iommu;
struct msm_mmu *mmu;
struct msm_gem_address_space *aspace;
+ struct iommu_domain_geometry *geometry;
u64 start, size;
- iommu = iommu_domain_alloc(&platform_bus_type);
- if (!iommu)
- return NULL;
-
- mmu = msm_iommu_new(&pdev->dev, iommu);
- if (IS_ERR(mmu)) {
- iommu_domain_free(iommu);
+ mmu = msm_iommu_new(&pdev->dev);
+ if (IS_ERR_OR_NULL(mmu))
return ERR_CAST(mmu);
- }
+
+ geometry = msm_iommu_get_geometry(mmu);
+ if (IS_ERR(geometry))
+ return ERR_CAST(geometry);
/*
* Use the aperture start or SZ_16M, whichever is greater. This will
* ensure that we align with the allocated pagetable range while still
* allowing room in the lower 32 bits for GMEM and whatnot
*/
- start = max_t(u64, SZ_16M, iommu->geometry.aperture_start);
- size = iommu->geometry.aperture_end - start + 1;
+ start = max_t(u64, SZ_16M, geometry->aperture_start);
+ size = geometry->aperture_end - start + 1;
aspace = msm_gem_address_space_create(mmu, "gpu",
start & GENMASK_ULL(48, 0), size);
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
index 964573d26d26..5f7488a539f5 100644
--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
@@ -387,7 +387,7 @@ static int mdp4_kms_init(struct drm_device *dev)
struct msm_drm_private *priv = dev->dev_private;
struct mdp4_kms *mdp4_kms;
struct msm_kms *kms = NULL;
- struct iommu_domain *iommu;
+ struct msm_mmu *mmu;
struct msm_gem_address_space *aspace;
int irq, ret;
u32 major, minor;
@@ -499,10 +499,15 @@ static int mdp4_kms_init(struct drm_device *dev)
mdp4_disable(mdp4_kms);
mdelay(16);
- iommu = iommu_domain_alloc(pdev->dev.bus);
- if (iommu) {
- struct msm_mmu *mmu = msm_iommu_new(&pdev->dev, iommu);
-
+ mmu = msm_iommu_new(&pdev->dev);
+ if (IS_ERR(mmu)) {
+ ret = PTR_ERR(mmu);
+ goto fail;
+ } else if (!mmu) {
+ DRM_DEV_INFO(dev->dev, "no iommu, fallback to phys "
+ "contig buffers for scanout\n");
+ aspace = NULL;
+ } else {
aspace = msm_gem_address_space_create(mmu,
"mdp4", 0x1000, 0x100000000 - 0x1000);
@@ -514,10 +519,6 @@ static int mdp4_kms_init(struct drm_device *dev)
}
kms->aspace = aspace;
- } else {
- DRM_DEV_INFO(dev->dev, "no iommu, fallback to phys "
- "contig buffers for scanout\n");
- aspace = NULL;
}
ret = modeset_init(mdp4_kms);
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 28034c21f6bc..9d7275304785 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -276,7 +276,6 @@ static int msm_drm_uninit(struct device *dev)
struct msm_gem_address_space *msm_kms_init_aspace(struct drm_device *dev)
{
- struct iommu_domain *domain;
struct msm_gem_address_space *aspace;
struct msm_mmu *mmu;
struct device *mdp_dev = dev->dev;
@@ -292,22 +291,21 @@ struct msm_gem_address_space *msm_kms_init_aspace(struct drm_device *dev)
else
iommu_dev = mdss_dev;
- domain = iommu_domain_alloc(iommu_dev->bus);
- if (!domain) {
+ mmu = msm_iommu_new(iommu_dev);
+ if (IS_ERR(mmu))
+ return ERR_CAST(mmu);
+
+ if (!mmu) {
drm_info(dev, "no IOMMU, fallback to phys contig buffers for scanout\n");
return NULL;
}
- mmu = msm_iommu_new(iommu_dev, domain);
- if (IS_ERR(mmu)) {
- iommu_domain_free(domain);
- return ERR_CAST(mmu);
- }
-
aspace = msm_gem_address_space_create(mmu, "mdp_kms",
0x1000, 0x100000000 - 0x1000);
- if (IS_ERR(aspace))
+ if (IS_ERR(aspace)) {
+ dev_err(mdp_dev, "aspace create, error %pe\n", aspace);
mmu->funcs->destroy(mmu);
+ }
return aspace;
}
diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c
index 768ab71cc43e..b2e0be4cc985 100644
--- a/drivers/gpu/drm/msm/msm_iommu.c
+++ b/drivers/gpu/drm/msm/msm_iommu.c
@@ -193,6 +193,13 @@ int msm_iommu_set_pgtable_quirks(struct msm_mmu *mmu, unsigned long quirk)
return iommu_set_pgtable_quirks(iommu->domain, quirk);
}
+struct iommu_domain_geometry *msm_iommu_get_geometry(struct msm_mmu *mmu)
+{
+ struct msm_iommu *iommu = to_msm_iommu(mmu);
+
+ return &iommu->domain->geometry;
+}
+
static const struct msm_mmu_funcs pagetable_funcs = {
.map = msm_iommu_pagetable_map,
.unmap = msm_iommu_pagetable_unmap,
@@ -374,17 +381,21 @@ static const struct msm_mmu_funcs funcs = {
.resume_translation = msm_iommu_resume_translation,
};
-struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain)
+struct msm_mmu *msm_iommu_new(struct device *dev)
{
+ struct iommu_domain *domain;
struct msm_iommu *iommu;
int ret;
+ domain = iommu_domain_alloc(dev->bus);
if (!domain)
- return ERR_PTR(-ENODEV);
+ return NULL;
iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
- if (!iommu)
+ if (!iommu) {
+ iommu_domain_free(domain);
return ERR_PTR(-ENOMEM);
+ }
iommu->domain = domain;
msm_mmu_init(&iommu->base, dev, &funcs, MSM_MMU_IOMMU);
@@ -393,6 +404,7 @@ struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain)
ret = iommu_attach_device(iommu->domain, dev);
if (ret) {
+ iommu_domain_free(domain);
kfree(iommu);
return ERR_PTR(ret);
}
diff --git a/drivers/gpu/drm/msm/msm_mmu.h b/drivers/gpu/drm/msm/msm_mmu.h
index d968d9f8e19c..02df00ddd463 100644
--- a/drivers/gpu/drm/msm/msm_mmu.h
+++ b/drivers/gpu/drm/msm/msm_mmu.h
@@ -40,7 +40,7 @@ static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev,
mmu->type = type;
}
-struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain);
+struct msm_mmu *msm_iommu_new(struct device *dev);
struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu);
static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg,
@@ -59,5 +59,6 @@ void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
int msm_iommu_pagetable_params(struct msm_mmu *mmu, phys_addr_t *ttbr,
int *asid);
int msm_iommu_set_pgtable_quirks(struct msm_mmu *mmu, unsigned long quirk);
+struct iommu_domain_geometry *msm_iommu_get_geometry(struct msm_mmu *mmu);
#endif /* __MSM_MMU_H__ */
--
2.35.1
More information about the dri-devel
mailing list