Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Russell King | 2263 | 91.07% | 4 | 13.79% |
Daniel Vetter | 49 | 1.97% | 3 | 10.34% |
Thomas Zimmermann | 43 | 1.73% | 1 | 3.45% |
Sumit Semwal | 29 | 1.17% | 1 | 3.45% |
Marek Szyprowski | 22 | 0.89% | 1 | 3.45% |
Christoph Hellwig | 12 | 0.48% | 1 | 3.45% |
Dave Jiang | 11 | 0.44% | 1 | 3.45% |
Chris Wilson | 7 | 0.28% | 2 | 6.90% |
Andreas Gruenbacher | 7 | 0.28% | 1 | 3.45% |
Jan Kara | 6 | 0.24% | 1 | 3.45% |
Jack Steiner | 5 | 0.20% | 1 | 3.45% |
Greg Kroah-Hartman | 5 | 0.20% | 1 | 3.45% |
Emil Velikov | 5 | 0.20% | 1 | 3.45% |
Sam Ravnborg | 5 | 0.20% | 1 | 3.45% |
Souptick Joarder | 3 | 0.12% | 1 | 3.45% |
Kirill A. Shutemov | 2 | 0.08% | 1 | 3.45% |
Al Viro | 2 | 0.08% | 1 | 3.45% |
Dmitry Osipenko | 2 | 0.08% | 1 | 3.45% |
Thomas Gleixner | 2 | 0.08% | 1 | 3.45% |
Baoyou Xie | 2 | 0.08% | 1 | 3.45% |
David Herrmann | 1 | 0.04% | 1 | 3.45% |
Haneen Mohammed | 1 | 0.04% | 1 | 3.45% |
Danilo Krummrich | 1 | 0.04% | 1 | 3.45% |
Total | 2485 | 29 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012 Russell King */ #include <linux/dma-buf.h> #include <linux/dma-mapping.h> #include <linux/mman.h> #include <linux/shmem_fs.h> #include <drm/armada_drm.h> #include <drm/drm_prime.h> #include "armada_drm.h" #include "armada_gem.h" #include "armada_ioctlP.h" MODULE_IMPORT_NS(DMA_BUF); static vm_fault_t armada_gem_vm_fault(struct vm_fault *vmf) { struct drm_gem_object *gobj = vmf->vma->vm_private_data; struct armada_gem_object *obj = drm_to_armada_gem(gobj); unsigned long pfn = obj->phys_addr >> PAGE_SHIFT; pfn += (vmf->address - vmf->vma->vm_start) >> PAGE_SHIFT; return vmf_insert_pfn(vmf->vma, vmf->address, pfn); } static const struct vm_operations_struct armada_gem_vm_ops = { .fault = armada_gem_vm_fault, .open = drm_gem_vm_open, .close = drm_gem_vm_close, }; static size_t roundup_gem_size(size_t size) { return roundup(size, PAGE_SIZE); } void armada_gem_free_object(struct drm_gem_object *obj) { struct armada_gem_object *dobj = drm_to_armada_gem(obj); struct armada_private *priv = drm_to_armada_dev(obj->dev); DRM_DEBUG_DRIVER("release obj %p\n", dobj); drm_gem_free_mmap_offset(&dobj->obj); might_lock(&priv->linear_lock); if (dobj->page) { /* page backed memory */ unsigned int order = get_order(dobj->obj.size); __free_pages(dobj->page, order); } else if (dobj->linear) { /* linear backed memory */ mutex_lock(&priv->linear_lock); drm_mm_remove_node(dobj->linear); mutex_unlock(&priv->linear_lock); kfree(dobj->linear); if (dobj->addr) iounmap(dobj->addr); } if (dobj->obj.import_attach) { /* We only ever display imported data */ if (dobj->sgt) dma_buf_unmap_attachment_unlocked(dobj->obj.import_attach, dobj->sgt, DMA_TO_DEVICE); drm_prime_gem_destroy(&dobj->obj, NULL); } drm_gem_object_release(&dobj->obj); kfree(dobj); } int armada_gem_linear_back(struct drm_device *dev, struct armada_gem_object *obj) { struct armada_private *priv = drm_to_armada_dev(dev); size_t size = obj->obj.size; if (obj->page || obj->linear) return 0; /* * If it is a small allocation (typically cursor, which will * be 32x64 or 64x32 ARGB pixels) try to get it from the system. * Framebuffers will never be this small (our minimum size for * framebuffers is larger than this anyway.) Such objects are * only accessed by the CPU so we don't need any special handing * here. */ if (size <= 8192) { unsigned int order = get_order(size); struct page *p = alloc_pages(GFP_KERNEL, order); if (p) { obj->addr = page_address(p); obj->phys_addr = page_to_phys(p); obj->page = p; memset(obj->addr, 0, PAGE_ALIGN(size)); } } /* * We could grab something from DMA if it's enabled, but that * involves building in a problem: * * GEM DMA helper interface uses dma_alloc_coherent(), which provides * us with an CPU virtual address and a device address. * * The CPU virtual address may be either an address in the kernel * direct mapped region (for example, as it would be on x86) or * it may be remapped into another part of kernel memory space * (eg, as it would be on ARM.) This means virt_to_phys() on the * returned virtual address is invalid depending on the architecture * implementation. * * The device address may also not be a physical address; it may * be that there is some kind of remapping between the device and * system RAM, which makes the use of the device address also * unsafe to re-use as a physical address. * * This makes DRM usage of dma_alloc_coherent() in a generic way * at best very questionable and unsafe. */ /* Otherwise, grab it from our linear allocation */ if (!obj->page) { struct drm_mm_node *node; unsigned align = min_t(unsigned, size, SZ_2M); void __iomem *ptr; int ret; node = kzalloc(sizeof(*node), GFP_KERNEL); if (!node) return -ENOSPC; mutex_lock(&priv->linear_lock); ret = drm_mm_insert_node_generic(&priv->linear, node, size, align, 0, 0); mutex_unlock(&priv->linear_lock); if (ret) { kfree(node); return ret; } obj->linear = node; /* Ensure that the memory we're returning is cleared. */ ptr = ioremap_wc(obj->linear->start, size); if (!ptr) { mutex_lock(&priv->linear_lock); drm_mm_remove_node(obj->linear); mutex_unlock(&priv->linear_lock); kfree(obj->linear); obj->linear = NULL; return -ENOMEM; } memset_io(ptr, 0, size); iounmap(ptr); obj->phys_addr = obj->linear->start; obj->dev_addr = obj->linear->start; obj->mapped = true; } DRM_DEBUG_DRIVER("obj %p phys %#llx dev %#llx\n", obj, (unsigned long long)obj->phys_addr, (unsigned long long)obj->dev_addr); return 0; } void * armada_gem_map_object(struct drm_device *dev, struct armada_gem_object *dobj) { /* only linear objects need to be ioremap'd */ if (!dobj->addr && dobj->linear) dobj->addr = ioremap_wc(dobj->phys_addr, dobj->obj.size); return dobj->addr; } static const struct drm_gem_object_funcs armada_gem_object_funcs = { .free = armada_gem_free_object, .export = armada_gem_prime_export, .vm_ops = &armada_gem_vm_ops, }; struct armada_gem_object * armada_gem_alloc_private_object(struct drm_device *dev, size_t size) { struct armada_gem_object *obj; size = roundup_gem_size(size); obj = kzalloc(sizeof(*obj), GFP_KERNEL); if (!obj) return NULL; obj->obj.funcs = &armada_gem_object_funcs; drm_gem_private_object_init(dev, &obj->obj, size); DRM_DEBUG_DRIVER("alloc private obj %p size %zu\n", obj, size); return obj; } static struct armada_gem_object *armada_gem_alloc_object(struct drm_device *dev, size_t size) { struct armada_gem_object *obj; struct address_space *mapping; size = roundup_gem_size(size); obj = kzalloc(sizeof(*obj), GFP_KERNEL); if (!obj) return NULL; obj->obj.funcs = &armada_gem_object_funcs; if (drm_gem_object_init(dev, &obj->obj, size)) { kfree(obj); return NULL; } mapping = obj->obj.filp->f_mapping; mapping_set_gfp_mask(mapping, GFP_HIGHUSER | __GFP_RECLAIMABLE); DRM_DEBUG_DRIVER("alloc obj %p size %zu\n", obj, size); return obj; } /* Dumb alloc support */ int armada_gem_dumb_create(struct drm_file *file, struct drm_device *dev, struct drm_mode_create_dumb *args) { struct armada_gem_object *dobj; u32 handle; size_t size; int ret; args->pitch = armada_pitch(args->width, args->bpp); args->size = size = args->pitch * args->height; dobj = armada_gem_alloc_private_object(dev, size); if (dobj == NULL) return -ENOMEM; ret = armada_gem_linear_back(dev, dobj); if (ret) goto err; ret = drm_gem_handle_create(file, &dobj->obj, &handle); if (ret) goto err; args->handle = handle; /* drop reference from allocate - handle holds it now */ DRM_DEBUG_DRIVER("obj %p size %zu handle %#x\n", dobj, size, handle); err: drm_gem_object_put(&dobj->obj); return ret; } /* Private driver gem ioctls */ int armada_gem_create_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { struct drm_armada_gem_create *args = data; struct armada_gem_object *dobj; size_t size; u32 handle; int ret; if (args->size == 0) return -ENOMEM; size = args->size; dobj = armada_gem_alloc_object(dev, size); if (dobj == NULL) return -ENOMEM; ret = drm_gem_handle_create(file, &dobj->obj, &handle); if (ret) goto err; args->handle = handle; /* drop reference from allocate - handle holds it now */ DRM_DEBUG_DRIVER("obj %p size %zu handle %#x\n", dobj, size, handle); err: drm_gem_object_put(&dobj->obj); return ret; } /* Map a shmem-backed object into process memory space */ int armada_gem_mmap_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { struct drm_armada_gem_mmap *args = data; struct armada_gem_object *dobj; unsigned long addr; dobj = armada_gem_object_lookup(file, args->handle); if (dobj == NULL) return -ENOENT; if (!dobj->obj.filp) { drm_gem_object_put(&dobj->obj); return -EINVAL; } addr = vm_mmap(dobj->obj.filp, 0, args->size, PROT_READ | PROT_WRITE, MAP_SHARED, args->offset); drm_gem_object_put(&dobj->obj); if (IS_ERR_VALUE(addr)) return addr; args->addr = addr; return 0; } int armada_gem_pwrite_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { struct drm_armada_gem_pwrite *args = data; struct armada_gem_object *dobj; char __user *ptr; int ret = 0; DRM_DEBUG_DRIVER("handle %u off %u size %u ptr 0x%llx\n", args->handle, args->offset, args->size, args->ptr); if (args->size == 0) return 0; ptr = (char __user *)(uintptr_t)args->ptr; if (!access_ok(ptr, args->size)) return -EFAULT; if (fault_in_readable(ptr, args->size)) return -EFAULT; dobj = armada_gem_object_lookup(file, args->handle); if (dobj == NULL) return -ENOENT; /* Must be a kernel-mapped object */ if (!dobj->addr) return -EINVAL; if (args->offset > dobj->obj.size || args->size > dobj->obj.size - args->offset) { DRM_ERROR("invalid size: object size %u\n", dobj->obj.size); ret = -EINVAL; goto unref; } if (copy_from_user(dobj->addr + args->offset, ptr, args->size)) { ret = -EFAULT; } else if (dobj->update) { dobj->update(dobj->update_data); ret = 0; } unref: drm_gem_object_put(&dobj->obj); return ret; } /* Prime support */ static struct sg_table * armada_gem_prime_map_dma_buf(struct dma_buf_attachment *attach, enum dma_data_direction dir) { struct drm_gem_object *obj = attach->dmabuf->priv; struct armada_gem_object *dobj = drm_to_armada_gem(obj); struct scatterlist *sg; struct sg_table *sgt; int i; sgt = kmalloc(sizeof(*sgt), GFP_KERNEL); if (!sgt) return NULL; if (dobj->obj.filp) { struct address_space *mapping; int count; count = dobj->obj.size / PAGE_SIZE; if (sg_alloc_table(sgt, count, GFP_KERNEL)) goto free_sgt; mapping = dobj->obj.filp->f_mapping; for_each_sgtable_sg(sgt, sg, i) { struct page *page; page = shmem_read_mapping_page(mapping, i); if (IS_ERR(page)) goto release; sg_set_page(sg, page, PAGE_SIZE, 0); } if (dma_map_sgtable(attach->dev, sgt, dir, 0)) goto release; } else if (dobj->page) { /* Single contiguous page */ if (sg_alloc_table(sgt, 1, GFP_KERNEL)) goto free_sgt; sg_set_page(sgt->sgl, dobj->page, dobj->obj.size, 0); if (dma_map_sgtable(attach->dev, sgt, dir, 0)) goto free_table; } else if (dobj->linear) { /* Single contiguous physical region - no struct page */ if (sg_alloc_table(sgt, 1, GFP_KERNEL)) goto free_sgt; sg_dma_address(sgt->sgl) = dobj->dev_addr; sg_dma_len(sgt->sgl) = dobj->obj.size; } else { goto free_sgt; } return sgt; release: for_each_sgtable_sg(sgt, sg, i) if (sg_page(sg)) put_page(sg_page(sg)); free_table: sg_free_table(sgt); free_sgt: kfree(sgt); return NULL; } static void armada_gem_prime_unmap_dma_buf(struct dma_buf_attachment *attach, struct sg_table *sgt, enum dma_data_direction dir) { struct drm_gem_object *obj = attach->dmabuf->priv; struct armada_gem_object *dobj = drm_to_armada_gem(obj); int i; if (!dobj->linear) dma_unmap_sgtable(attach->dev, sgt, dir, 0); if (dobj->obj.filp) { struct scatterlist *sg; for_each_sgtable_sg(sgt, sg, i) put_page(sg_page(sg)); } sg_free_table(sgt); kfree(sgt); } static int armada_gem_dmabuf_mmap(struct dma_buf *buf, struct vm_area_struct *vma) { return -EINVAL; } static const struct dma_buf_ops armada_gem_prime_dmabuf_ops = { .map_dma_buf = armada_gem_prime_map_dma_buf, .unmap_dma_buf = armada_gem_prime_unmap_dma_buf, .release = drm_gem_dmabuf_release, .mmap = armada_gem_dmabuf_mmap, }; struct dma_buf * armada_gem_prime_export(struct drm_gem_object *obj, int flags) { DEFINE_DMA_BUF_EXPORT_INFO(exp_info); exp_info.ops = &armada_gem_prime_dmabuf_ops; exp_info.size = obj->size; exp_info.flags = O_RDWR; exp_info.priv = obj; return drm_gem_dmabuf_export(obj->dev, &exp_info); } struct drm_gem_object * armada_gem_prime_import(struct drm_device *dev, struct dma_buf *buf) { struct dma_buf_attachment *attach; struct armada_gem_object *dobj; if (buf->ops == &armada_gem_prime_dmabuf_ops) { struct drm_gem_object *obj = buf->priv; if (obj->dev == dev) { /* * Importing our own dmabuf(s) increases the * refcount on the gem object itself. */ drm_gem_object_get(obj); return obj; } } attach = dma_buf_attach(buf, dev->dev); if (IS_ERR(attach)) return ERR_CAST(attach); dobj = armada_gem_alloc_private_object(dev, buf->size); if (!dobj) { dma_buf_detach(buf, attach); return ERR_PTR(-ENOMEM); } dobj->obj.import_attach = attach; get_dma_buf(buf); /* * Don't call dma_buf_map_attachment() here - it maps the * scatterlist immediately for DMA, and this is not always * an appropriate thing to do. */ return &dobj->obj; } int armada_gem_map_import(struct armada_gem_object *dobj) { int ret; dobj->sgt = dma_buf_map_attachment_unlocked(dobj->obj.import_attach, DMA_TO_DEVICE); if (IS_ERR(dobj->sgt)) { ret = PTR_ERR(dobj->sgt); dobj->sgt = NULL; DRM_ERROR("dma_buf_map_attachment() error: %d\n", ret); return ret; } if (dobj->sgt->nents > 1) { DRM_ERROR("dma_buf_map_attachment() returned an (unsupported) scattered list\n"); return -EINVAL; } if (sg_dma_len(dobj->sgt->sgl) < dobj->obj.size) { DRM_ERROR("dma_buf_map_attachment() returned a small buffer\n"); return -EINVAL; } dobj->dev_addr = sg_dma_address(dobj->sgt->sgl); dobj->mapped = true; return 0; }
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