Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Thierry Reding | 2571 | 69.94% | 45 | 56.96% |
Arto Merilainen | 802 | 21.82% | 2 | 2.53% |
Thomas Zimmermann | 82 | 2.23% | 3 | 3.80% |
Dmitry Osipenko | 64 | 1.74% | 5 | 6.33% |
Sumit Semwal | 29 | 0.79% | 1 | 1.27% |
Mikko Perttunen | 23 | 0.63% | 3 | 3.80% |
Terje Bergstrom | 20 | 0.54% | 2 | 2.53% |
Marek Szyprowski | 15 | 0.41% | 1 | 1.27% |
Gerd Hoffmann | 9 | 0.24% | 2 | 2.53% |
Dave Jiang | 9 | 0.24% | 1 | 1.27% |
Suren Baghdasaryan | 9 | 0.24% | 1 | 1.27% |
Lucas De Marchi | 6 | 0.16% | 1 | 1.27% |
Daniel Vetter | 6 | 0.16% | 1 | 1.27% |
Sam Ravnborg | 6 | 0.16% | 1 | 1.27% |
Greg Kroah-Hartman | 5 | 0.14% | 1 | 1.27% |
David Herrmann | 3 | 0.08% | 1 | 1.27% |
Luis R. Rodriguez | 3 | 0.08% | 1 | 1.27% |
Souptick Joarder | 3 | 0.08% | 1 | 1.27% |
Chris Wilson | 2 | 0.05% | 1 | 1.27% |
Jan Kara | 2 | 0.05% | 1 | 1.27% |
Thomas Gleixner | 2 | 0.05% | 1 | 1.27% |
Cihangir Akturk | 2 | 0.05% | 1 | 1.27% |
Emil Velikov | 2 | 0.05% | 1 | 1.27% |
Dan Carpenter | 1 | 0.03% | 1 | 1.27% |
Total | 3676 | 79 |
// SPDX-License-Identifier: GPL-2.0-only /* * NVIDIA Tegra DRM GEM helper functions * * Copyright (C) 2012 Sascha Hauer, Pengutronix * Copyright (C) 2013-2015 NVIDIA CORPORATION, All rights reserved. * * Based on the GEM/CMA helpers * * Copyright (c) 2011 Samsung Electronics Co., Ltd. */ #include <linux/dma-buf.h> #include <linux/iommu.h> #include <linux/module.h> #include <drm/drm_drv.h> #include <drm/drm_prime.h> #include <drm/tegra_drm.h> #include "drm.h" #include "gem.h" MODULE_IMPORT_NS(DMA_BUF); static unsigned int sg_dma_count_chunks(struct scatterlist *sgl, unsigned int nents) { dma_addr_t next = ~(dma_addr_t)0; unsigned int count = 0, i; struct scatterlist *s; for_each_sg(sgl, s, nents, i) { /* sg_dma_address(s) is only valid for entries that have sg_dma_len(s) != 0. */ if (!sg_dma_len(s)) continue; if (sg_dma_address(s) != next) { next = sg_dma_address(s) + sg_dma_len(s); count++; } } return count; } static inline unsigned int sgt_dma_count_chunks(struct sg_table *sgt) { return sg_dma_count_chunks(sgt->sgl, sgt->nents); } static void tegra_bo_put(struct host1x_bo *bo) { struct tegra_bo *obj = host1x_to_tegra_bo(bo); drm_gem_object_put(&obj->gem); } static struct host1x_bo_mapping *tegra_bo_pin(struct device *dev, struct host1x_bo *bo, enum dma_data_direction direction) { struct tegra_bo *obj = host1x_to_tegra_bo(bo); struct drm_gem_object *gem = &obj->gem; struct host1x_bo_mapping *map; int err; map = kzalloc(sizeof(*map), GFP_KERNEL); if (!map) return ERR_PTR(-ENOMEM); kref_init(&map->ref); map->bo = host1x_bo_get(bo); map->direction = direction; map->dev = dev; /* * Imported buffers need special treatment to satisfy the semantics of DMA-BUF. */ if (gem->import_attach) { struct dma_buf *buf = gem->import_attach->dmabuf; map->attach = dma_buf_attach(buf, dev); if (IS_ERR(map->attach)) { err = PTR_ERR(map->attach); goto free; } map->sgt = dma_buf_map_attachment_unlocked(map->attach, direction); if (IS_ERR(map->sgt)) { dma_buf_detach(buf, map->attach); err = PTR_ERR(map->sgt); map->sgt = NULL; goto free; } err = sgt_dma_count_chunks(map->sgt); map->size = gem->size; goto out; } /* * If we don't have a mapping for this buffer yet, return an SG table * so that host1x can do the mapping for us via the DMA API. */ map->sgt = kzalloc(sizeof(*map->sgt), GFP_KERNEL); if (!map->sgt) { err = -ENOMEM; goto free; } if (obj->pages) { /* * If the buffer object was allocated from the explicit IOMMU * API code paths, construct an SG table from the pages. */ err = sg_alloc_table_from_pages(map->sgt, obj->pages, obj->num_pages, 0, gem->size, GFP_KERNEL); if (err < 0) goto free; } else { /* * If the buffer object had no pages allocated and if it was * not imported, it had to be allocated with the DMA API, so * the DMA API helper can be used. */ err = dma_get_sgtable(dev, map->sgt, obj->vaddr, obj->iova, gem->size); if (err < 0) goto free; } err = dma_map_sgtable(dev, map->sgt, direction, 0); if (err) goto free_sgt; out: /* * If we've manually mapped the buffer object through the IOMMU, make sure to return the * existing IOVA address of our mapping. */ if (!obj->mm) { map->phys = sg_dma_address(map->sgt->sgl); map->chunks = err; } else { map->phys = obj->iova; map->chunks = 1; } map->size = gem->size; return map; free_sgt: sg_free_table(map->sgt); free: kfree(map->sgt); kfree(map); return ERR_PTR(err); } static void tegra_bo_unpin(struct host1x_bo_mapping *map) { if (map->attach) { dma_buf_unmap_attachment_unlocked(map->attach, map->sgt, map->direction); dma_buf_detach(map->attach->dmabuf, map->attach); } else { dma_unmap_sgtable(map->dev, map->sgt, map->direction, 0); sg_free_table(map->sgt); kfree(map->sgt); } host1x_bo_put(map->bo); kfree(map); } static void *tegra_bo_mmap(struct host1x_bo *bo) { struct tegra_bo *obj = host1x_to_tegra_bo(bo); struct iosys_map map; int ret; if (obj->vaddr) { return obj->vaddr; } else if (obj->gem.import_attach) { ret = dma_buf_vmap_unlocked(obj->gem.import_attach->dmabuf, &map); return ret ? NULL : map.vaddr; } else { return vmap(obj->pages, obj->num_pages, VM_MAP, pgprot_writecombine(PAGE_KERNEL)); } } static void tegra_bo_munmap(struct host1x_bo *bo, void *addr) { struct tegra_bo *obj = host1x_to_tegra_bo(bo); struct iosys_map map = IOSYS_MAP_INIT_VADDR(addr); if (obj->vaddr) return; else if (obj->gem.import_attach) dma_buf_vunmap_unlocked(obj->gem.import_attach->dmabuf, &map); else vunmap(addr); } static struct host1x_bo *tegra_bo_get(struct host1x_bo *bo) { struct tegra_bo *obj = host1x_to_tegra_bo(bo); drm_gem_object_get(&obj->gem); return bo; } static const struct host1x_bo_ops tegra_bo_ops = { .get = tegra_bo_get, .put = tegra_bo_put, .pin = tegra_bo_pin, .unpin = tegra_bo_unpin, .mmap = tegra_bo_mmap, .munmap = tegra_bo_munmap, }; static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo) { int prot = IOMMU_READ | IOMMU_WRITE; int err; if (bo->mm) return -EBUSY; bo->mm = kzalloc(sizeof(*bo->mm), GFP_KERNEL); if (!bo->mm) return -ENOMEM; mutex_lock(&tegra->mm_lock); err = drm_mm_insert_node_generic(&tegra->mm, bo->mm, bo->gem.size, PAGE_SIZE, 0, 0); if (err < 0) { dev_err(tegra->drm->dev, "out of I/O virtual memory: %d\n", err); goto unlock; } bo->iova = bo->mm->start; bo->size = iommu_map_sgtable(tegra->domain, bo->iova, bo->sgt, prot); if (!bo->size) { dev_err(tegra->drm->dev, "failed to map buffer\n"); err = -ENOMEM; goto remove; } mutex_unlock(&tegra->mm_lock); return 0; remove: drm_mm_remove_node(bo->mm); unlock: mutex_unlock(&tegra->mm_lock); kfree(bo->mm); return err; } static int tegra_bo_iommu_unmap(struct tegra_drm *tegra, struct tegra_bo *bo) { if (!bo->mm) return 0; mutex_lock(&tegra->mm_lock); iommu_unmap(tegra->domain, bo->iova, bo->size); drm_mm_remove_node(bo->mm); mutex_unlock(&tegra->mm_lock); kfree(bo->mm); return 0; } static const struct drm_gem_object_funcs tegra_gem_object_funcs = { .free = tegra_bo_free_object, .export = tegra_gem_prime_export, .vm_ops = &tegra_bo_vm_ops, }; static struct tegra_bo *tegra_bo_alloc_object(struct drm_device *drm, size_t size) { struct tegra_bo *bo; int err; bo = kzalloc(sizeof(*bo), GFP_KERNEL); if (!bo) return ERR_PTR(-ENOMEM); bo->gem.funcs = &tegra_gem_object_funcs; host1x_bo_init(&bo->base, &tegra_bo_ops); size = round_up(size, PAGE_SIZE); err = drm_gem_object_init(drm, &bo->gem, size); if (err < 0) goto free; err = drm_gem_create_mmap_offset(&bo->gem); if (err < 0) goto release; return bo; release: drm_gem_object_release(&bo->gem); free: kfree(bo); return ERR_PTR(err); } static void tegra_bo_free(struct drm_device *drm, struct tegra_bo *bo) { if (bo->pages) { dma_unmap_sgtable(drm->dev, bo->sgt, DMA_FROM_DEVICE, 0); drm_gem_put_pages(&bo->gem, bo->pages, true, true); sg_free_table(bo->sgt); kfree(bo->sgt); } else if (bo->vaddr) { dma_free_wc(drm->dev, bo->gem.size, bo->vaddr, bo->iova); } } static int tegra_bo_get_pages(struct drm_device *drm, struct tegra_bo *bo) { int err; bo->pages = drm_gem_get_pages(&bo->gem); if (IS_ERR(bo->pages)) return PTR_ERR(bo->pages); bo->num_pages = bo->gem.size >> PAGE_SHIFT; bo->sgt = drm_prime_pages_to_sg(bo->gem.dev, bo->pages, bo->num_pages); if (IS_ERR(bo->sgt)) { err = PTR_ERR(bo->sgt); goto put_pages; } err = dma_map_sgtable(drm->dev, bo->sgt, DMA_FROM_DEVICE, 0); if (err) goto free_sgt; return 0; free_sgt: sg_free_table(bo->sgt); kfree(bo->sgt); put_pages: drm_gem_put_pages(&bo->gem, bo->pages, false, false); return err; } static int tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo) { struct tegra_drm *tegra = drm->dev_private; int err; if (tegra->domain) { err = tegra_bo_get_pages(drm, bo); if (err < 0) return err; err = tegra_bo_iommu_map(tegra, bo); if (err < 0) { tegra_bo_free(drm, bo); return err; } } else { size_t size = bo->gem.size; bo->vaddr = dma_alloc_wc(drm->dev, size, &bo->iova, GFP_KERNEL | __GFP_NOWARN); if (!bo->vaddr) { dev_err(drm->dev, "failed to allocate buffer of size %zu\n", size); return -ENOMEM; } } return 0; } struct tegra_bo *tegra_bo_create(struct drm_device *drm, size_t size, unsigned long flags) { struct tegra_bo *bo; int err; bo = tegra_bo_alloc_object(drm, size); if (IS_ERR(bo)) return bo; err = tegra_bo_alloc(drm, bo); if (err < 0) goto release; if (flags & DRM_TEGRA_GEM_CREATE_TILED) bo->tiling.mode = TEGRA_BO_TILING_MODE_TILED; if (flags & DRM_TEGRA_GEM_CREATE_BOTTOM_UP) bo->flags |= TEGRA_BO_BOTTOM_UP; return bo; release: drm_gem_object_release(&bo->gem); kfree(bo); return ERR_PTR(err); } struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file, struct drm_device *drm, size_t size, unsigned long flags, u32 *handle) { struct tegra_bo *bo; int err; bo = tegra_bo_create(drm, size, flags); if (IS_ERR(bo)) return bo; err = drm_gem_handle_create(file, &bo->gem, handle); if (err) { tegra_bo_free_object(&bo->gem); return ERR_PTR(err); } drm_gem_object_put(&bo->gem); return bo; } static struct tegra_bo *tegra_bo_import(struct drm_device *drm, struct dma_buf *buf) { struct tegra_drm *tegra = drm->dev_private; struct dma_buf_attachment *attach; struct tegra_bo *bo; int err; bo = tegra_bo_alloc_object(drm, buf->size); if (IS_ERR(bo)) return bo; attach = dma_buf_attach(buf, drm->dev); if (IS_ERR(attach)) { err = PTR_ERR(attach); goto free; } get_dma_buf(buf); bo->sgt = dma_buf_map_attachment_unlocked(attach, DMA_TO_DEVICE); if (IS_ERR(bo->sgt)) { err = PTR_ERR(bo->sgt); goto detach; } if (tegra->domain) { err = tegra_bo_iommu_map(tegra, bo); if (err < 0) goto detach; } bo->gem.import_attach = attach; return bo; detach: if (!IS_ERR_OR_NULL(bo->sgt)) dma_buf_unmap_attachment_unlocked(attach, bo->sgt, DMA_TO_DEVICE); dma_buf_detach(buf, attach); dma_buf_put(buf); free: drm_gem_object_release(&bo->gem); kfree(bo); return ERR_PTR(err); } void tegra_bo_free_object(struct drm_gem_object *gem) { struct tegra_drm *tegra = gem->dev->dev_private; struct host1x_bo_mapping *mapping, *tmp; struct tegra_bo *bo = to_tegra_bo(gem); /* remove all mappings of this buffer object from any caches */ list_for_each_entry_safe(mapping, tmp, &bo->base.mappings, list) { if (mapping->cache) host1x_bo_unpin(mapping); else dev_err(gem->dev->dev, "mapping %p stale for device %s\n", mapping, dev_name(mapping->dev)); } if (tegra->domain) tegra_bo_iommu_unmap(tegra, bo); if (gem->import_attach) { dma_buf_unmap_attachment_unlocked(gem->import_attach, bo->sgt, DMA_TO_DEVICE); drm_prime_gem_destroy(gem, NULL); } else { tegra_bo_free(gem->dev, bo); } drm_gem_object_release(gem); kfree(bo); } int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm, struct drm_mode_create_dumb *args) { unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); struct tegra_drm *tegra = drm->dev_private; struct tegra_bo *bo; args->pitch = round_up(min_pitch, tegra->pitch_align); args->size = args->pitch * args->height; bo = tegra_bo_create_with_handle(file, drm, args->size, 0, &args->handle); if (IS_ERR(bo)) return PTR_ERR(bo); return 0; } static vm_fault_t tegra_bo_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct drm_gem_object *gem = vma->vm_private_data; struct tegra_bo *bo = to_tegra_bo(gem); struct page *page; pgoff_t offset; if (!bo->pages) return VM_FAULT_SIGBUS; offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT; page = bo->pages[offset]; return vmf_insert_page(vma, vmf->address, page); } const struct vm_operations_struct tegra_bo_vm_ops = { .fault = tegra_bo_fault, .open = drm_gem_vm_open, .close = drm_gem_vm_close, }; int __tegra_gem_mmap(struct drm_gem_object *gem, struct vm_area_struct *vma) { struct tegra_bo *bo = to_tegra_bo(gem); if (!bo->pages) { unsigned long vm_pgoff = vma->vm_pgoff; int err; /* * Clear the VM_PFNMAP flag that was set by drm_gem_mmap(), * and set the vm_pgoff (used as a fake buffer offset by DRM) * to 0 as we want to map the whole buffer. */ vm_flags_clear(vma, VM_PFNMAP); vma->vm_pgoff = 0; err = dma_mmap_wc(gem->dev->dev, vma, bo->vaddr, bo->iova, gem->size); if (err < 0) { drm_gem_vm_close(vma); return err; } vma->vm_pgoff = vm_pgoff; } else { pgprot_t prot = vm_get_page_prot(vma->vm_flags); vm_flags_mod(vma, VM_MIXEDMAP, VM_PFNMAP); vma->vm_page_prot = pgprot_writecombine(prot); } return 0; } int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma) { struct drm_gem_object *gem; int err; err = drm_gem_mmap(file, vma); if (err < 0) return err; gem = vma->vm_private_data; return __tegra_gem_mmap(gem, vma); } static struct sg_table * tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach, enum dma_data_direction dir) { struct drm_gem_object *gem = attach->dmabuf->priv; struct tegra_bo *bo = to_tegra_bo(gem); struct sg_table *sgt; sgt = kmalloc(sizeof(*sgt), GFP_KERNEL); if (!sgt) return NULL; if (bo->pages) { if (sg_alloc_table_from_pages(sgt, bo->pages, bo->num_pages, 0, gem->size, GFP_KERNEL) < 0) goto free; } else { if (dma_get_sgtable(attach->dev, sgt, bo->vaddr, bo->iova, gem->size) < 0) goto free; } if (dma_map_sgtable(attach->dev, sgt, dir, 0)) goto free; return sgt; free: sg_free_table(sgt); kfree(sgt); return NULL; } static void tegra_gem_prime_unmap_dma_buf(struct dma_buf_attachment *attach, struct sg_table *sgt, enum dma_data_direction dir) { struct drm_gem_object *gem = attach->dmabuf->priv; struct tegra_bo *bo = to_tegra_bo(gem); if (bo->pages) dma_unmap_sgtable(attach->dev, sgt, dir, 0); sg_free_table(sgt); kfree(sgt); } static void tegra_gem_prime_release(struct dma_buf *buf) { drm_gem_dmabuf_release(buf); } static int tegra_gem_prime_begin_cpu_access(struct dma_buf *buf, enum dma_data_direction direction) { struct drm_gem_object *gem = buf->priv; struct tegra_bo *bo = to_tegra_bo(gem); struct drm_device *drm = gem->dev; if (bo->pages) dma_sync_sgtable_for_cpu(drm->dev, bo->sgt, DMA_FROM_DEVICE); return 0; } static int tegra_gem_prime_end_cpu_access(struct dma_buf *buf, enum dma_data_direction direction) { struct drm_gem_object *gem = buf->priv; struct tegra_bo *bo = to_tegra_bo(gem); struct drm_device *drm = gem->dev; if (bo->pages) dma_sync_sgtable_for_device(drm->dev, bo->sgt, DMA_TO_DEVICE); return 0; } static int tegra_gem_prime_mmap(struct dma_buf *buf, struct vm_area_struct *vma) { struct drm_gem_object *gem = buf->priv; int err; dma_resv_assert_held(buf->resv); err = drm_gem_mmap_obj(gem, gem->size, vma); if (err < 0) return err; return __tegra_gem_mmap(gem, vma); } static int tegra_gem_prime_vmap(struct dma_buf *buf, struct iosys_map *map) { struct drm_gem_object *gem = buf->priv; struct tegra_bo *bo = to_tegra_bo(gem); void *vaddr; vaddr = tegra_bo_mmap(&bo->base); if (IS_ERR(vaddr)) return PTR_ERR(vaddr); iosys_map_set_vaddr(map, vaddr); return 0; } static void tegra_gem_prime_vunmap(struct dma_buf *buf, struct iosys_map *map) { struct drm_gem_object *gem = buf->priv; struct tegra_bo *bo = to_tegra_bo(gem); tegra_bo_munmap(&bo->base, map->vaddr); } static const struct dma_buf_ops tegra_gem_prime_dmabuf_ops = { .map_dma_buf = tegra_gem_prime_map_dma_buf, .unmap_dma_buf = tegra_gem_prime_unmap_dma_buf, .release = tegra_gem_prime_release, .begin_cpu_access = tegra_gem_prime_begin_cpu_access, .end_cpu_access = tegra_gem_prime_end_cpu_access, .mmap = tegra_gem_prime_mmap, .vmap = tegra_gem_prime_vmap, .vunmap = tegra_gem_prime_vunmap, }; struct dma_buf *tegra_gem_prime_export(struct drm_gem_object *gem, int flags) { DEFINE_DMA_BUF_EXPORT_INFO(exp_info); exp_info.exp_name = KBUILD_MODNAME; exp_info.owner = gem->dev->driver->fops->owner; exp_info.ops = &tegra_gem_prime_dmabuf_ops; exp_info.size = gem->size; exp_info.flags = flags; exp_info.priv = gem; return drm_gem_dmabuf_export(gem->dev, &exp_info); } struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm, struct dma_buf *buf) { struct tegra_bo *bo; if (buf->ops == &tegra_gem_prime_dmabuf_ops) { struct drm_gem_object *gem = buf->priv; if (gem->dev == drm) { drm_gem_object_get(gem); return gem; } } bo = tegra_bo_import(drm, buf); if (IS_ERR(bo)) return ERR_CAST(bo); return &bo->gem; } struct host1x_bo *tegra_gem_lookup(struct drm_file *file, u32 handle) { struct drm_gem_object *gem; struct tegra_bo *bo; gem = drm_gem_object_lookup(file, handle); if (!gem) return NULL; bo = to_tegra_bo(gem); return &bo->base; }
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