From: Rob Clark Date: Thu, 10 Jul 2014 02:08:15 +0000 (-0400) Subject: drm/msm: use upstream iommu X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=944fc36c31ed685cf8d3d125eb681ae7198f06fc;p=linux.git drm/msm: use upstream iommu Downstream kernel IOMMU had a non-standard way of dealing with multiple devices and multiple ports/contexts. We don't need that on upstream kernel, so rip out the crazy. Note that we have to move the pinning of the ringbuffer to after the IOMMU is attached. No idea how that managed to work properly on the downstream kernel. For now, I am leaving the IOMMU port name stuff in place, to simplify things for folks trying to backport latest drm/msm to device kernels. Once we no longer have to care about pre-DT kernels, we can drop this and instead backport upstream IOMMU driver. Signed-off-by: Rob Clark --- diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig index f12388967856b..c99c50de3226d 100644 --- a/drivers/gpu/drm/msm/Kconfig +++ b/drivers/gpu/drm/msm/Kconfig @@ -2,7 +2,6 @@ config DRM_MSM tristate "MSM DRM" depends on DRM - depends on MSM_IOMMU depends on ARCH_QCOM || (ARM && COMPILE_TEST) select DRM_KMS_HELPER select SHMEM diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index 28ca8cd8b09ed..76c1df73e7475 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -91,9 +91,17 @@ int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value) int adreno_hw_init(struct msm_gpu *gpu) { struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); + int ret; DBG("%s", gpu->name); + ret = msm_gem_get_iova_locked(gpu->rb->bo, gpu->id, &gpu->rb_iova); + if (ret) { + gpu->rb_iova = 0; + dev_err(gpu->dev->dev, "could not map ringbuffer: %d\n", ret); + return ret; + } + /* Setup REG_CP_RB_CNTL: */ gpu_write(gpu, REG_AXXX_CP_RB_CNTL, /* size is log2(quad-words): */ diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c index a9579ce2ffb9e..733646c0d3f87 100644 --- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c +++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c @@ -361,7 +361,7 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev) mdelay(16); if (config->iommu) { - mmu = msm_iommu_new(dev, config->iommu); + mmu = msm_iommu_new(&pdev->dev, config->iommu); if (IS_ERR(mmu)) { ret = PTR_ERR(mmu); goto fail; diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c index 33b826dc493d5..17175b5035b3d 100644 --- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c +++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c @@ -320,7 +320,7 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev) mdelay(16); if (config->iommu) { - mmu = msm_iommu_new(dev, config->iommu); + mmu = msm_iommu_new(&pdev->dev, config->iommu); if (IS_ERR(mmu)) { ret = PTR_ERR(mmu); dev_err(dev->dev, "failed to init iommu: %d\n", ret); diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index c6322197db8cf..915240b4b80a0 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -606,7 +606,7 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, iommu = iommu_domain_alloc(&platform_bus_type); if (iommu) { dev_info(drm->dev, "%s: using IOMMU\n", name); - gpu->mmu = msm_iommu_new(drm, iommu); + gpu->mmu = msm_iommu_new(&pdev->dev, iommu); } else { dev_info(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name); } @@ -621,13 +621,6 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, goto fail; } - ret = msm_gem_get_iova_locked(gpu->rb->bo, gpu->id, &gpu->rb_iova); - if (ret) { - gpu->rb_iova = 0; - dev_err(drm->dev, "could not map ringbuffer: %d\n", ret); - goto fail; - } - bs_init(gpu); return 0; diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c index 4b2ad9181edff..099af483fdf03 100644 --- a/drivers/gpu/drm/msm/msm_iommu.c +++ b/drivers/gpu/drm/msm/msm_iommu.c @@ -33,39 +33,14 @@ static int msm_fault_handler(struct iommu_domain *iommu, struct device *dev, static int msm_iommu_attach(struct msm_mmu *mmu, const char **names, int cnt) { - struct drm_device *dev = mmu->dev; struct msm_iommu *iommu = to_msm_iommu(mmu); - int i, ret; - - for (i = 0; i < cnt; i++) { - struct device *msm_iommu_get_ctx(const char *ctx_name); - struct device *ctx = msm_iommu_get_ctx(names[i]); - if (IS_ERR_OR_NULL(ctx)) { - dev_warn(dev->dev, "couldn't get %s context", names[i]); - continue; - } - ret = iommu_attach_device(iommu->domain, ctx); - if (ret) { - dev_warn(dev->dev, "could not attach iommu to %s", names[i]); - return ret; - } - } - - return 0; + return iommu_attach_device(iommu->domain, mmu->dev); } static void msm_iommu_detach(struct msm_mmu *mmu, const char **names, int cnt) { struct msm_iommu *iommu = to_msm_iommu(mmu); - int i; - - for (i = 0; i < cnt; i++) { - struct device *msm_iommu_get_ctx(const char *ctx_name); - struct device *ctx = msm_iommu_get_ctx(names[i]); - if (IS_ERR_OR_NULL(ctx)) - continue; - iommu_detach_device(iommu->domain, ctx); - } + iommu_detach_device(iommu->domain, mmu->dev); } static int msm_iommu_map(struct msm_mmu *mmu, uint32_t iova, @@ -149,7 +124,7 @@ static const struct msm_mmu_funcs funcs = { .destroy = msm_iommu_destroy, }; -struct msm_mmu *msm_iommu_new(struct drm_device *dev, struct iommu_domain *domain) +struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain) { struct msm_iommu *iommu; diff --git a/drivers/gpu/drm/msm/msm_mmu.h b/drivers/gpu/drm/msm/msm_mmu.h index 21da6d154f715..7cd88d9dc1555 100644 --- a/drivers/gpu/drm/msm/msm_mmu.h +++ b/drivers/gpu/drm/msm/msm_mmu.h @@ -32,17 +32,17 @@ struct msm_mmu_funcs { struct msm_mmu { const struct msm_mmu_funcs *funcs; - struct drm_device *dev; + struct device *dev; }; -static inline void msm_mmu_init(struct msm_mmu *mmu, struct drm_device *dev, +static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev, const struct msm_mmu_funcs *funcs) { mmu->dev = dev; mmu->funcs = funcs; } -struct msm_mmu *msm_iommu_new(struct drm_device *dev, struct iommu_domain *domain); -struct msm_mmu *msm_gpummu_new(struct drm_device *dev, struct msm_gpu *gpu); +struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain); +struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu); #endif /* __MSM_MMU_H__ */