| /* exynos_drm_gem.c |
| * |
| * Copyright (c) 2011 Samsung Electronics Co., Ltd. |
| * Author: Inki Dae <inki.dae@samsung.com> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include "drmP.h" |
| #include "drm.h" |
| |
| #include <linux/shmem_fs.h> |
| #include <drm/exynos_drm.h> |
| |
| #include "exynos_drm_drv.h" |
| #include "exynos_drm_gem.h" |
| #include "exynos_drm_buf.h" |
| |
| static unsigned int convert_to_vm_err_msg(int msg) |
| { |
| unsigned int out_msg; |
| |
| switch (msg) { |
| case 0: |
| case -ERESTARTSYS: |
| case -EINTR: |
| out_msg = VM_FAULT_NOPAGE; |
| break; |
| |
| case -ENOMEM: |
| out_msg = VM_FAULT_OOM; |
| break; |
| |
| default: |
| out_msg = VM_FAULT_SIGBUS; |
| break; |
| } |
| |
| return out_msg; |
| } |
| |
| static int check_gem_flags(unsigned int flags) |
| { |
| if (flags & ~(EXYNOS_BO_MASK)) { |
| DRM_ERROR("invalid flags.\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static unsigned long roundup_gem_size(unsigned long size, unsigned int flags) |
| { |
| if (!IS_NONCONTIG_BUFFER(flags)) { |
| if (size >= SZ_1M) |
| return roundup(size, SECTION_SIZE); |
| else if (size >= SZ_64K) |
| return roundup(size, SZ_64K); |
| else |
| goto out; |
| } |
| out: |
| return roundup(size, PAGE_SIZE); |
| } |
| |
| static struct page **exynos_gem_get_pages(struct drm_gem_object *obj, |
| gfp_t gfpmask) |
| { |
| struct inode *inode; |
| struct address_space *mapping; |
| struct page *p, **pages; |
| int i, npages; |
| |
| /* This is the shared memory object that backs the GEM resource */ |
| inode = obj->filp->f_path.dentry->d_inode; |
| mapping = inode->i_mapping; |
| |
| npages = obj->size >> PAGE_SHIFT; |
| |
| pages = drm_malloc_ab(npages, sizeof(struct page *)); |
| if (pages == NULL) |
| return ERR_PTR(-ENOMEM); |
| |
| gfpmask |= mapping_gfp_mask(mapping); |
| |
| for (i = 0; i < npages; i++) { |
| p = shmem_read_mapping_page_gfp(mapping, i, gfpmask); |
| if (IS_ERR(p)) |
| goto fail; |
| pages[i] = p; |
| } |
| |
| return pages; |
| |
| fail: |
| while (i--) |
| page_cache_release(pages[i]); |
| |
| drm_free_large(pages); |
| return ERR_PTR(PTR_ERR(p)); |
| } |
| |
| static void exynos_gem_put_pages(struct drm_gem_object *obj, |
| struct page **pages, |
| bool dirty, bool accessed) |
| { |
| int i, npages; |
| |
| npages = obj->size >> PAGE_SHIFT; |
| |
| for (i = 0; i < npages; i++) { |
| if (dirty) |
| set_page_dirty(pages[i]); |
| |
| if (accessed) |
| mark_page_accessed(pages[i]); |
| |
| /* Undo the reference we took when populating the table */ |
| page_cache_release(pages[i]); |
| } |
| |
| drm_free_large(pages); |
| } |
| |
| static int exynos_drm_gem_map_pages(struct drm_gem_object *obj, |
| struct vm_area_struct *vma, |
| unsigned long f_vaddr, |
| pgoff_t page_offset) |
| { |
| struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); |
| struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; |
| unsigned long pfn; |
| |
| if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { |
| unsigned long usize = buf->size; |
| |
| if (!buf->pages) |
| return -EINTR; |
| |
| while (usize > 0) { |
| pfn = page_to_pfn(buf->pages[page_offset++]); |
| vm_insert_mixed(vma, f_vaddr, pfn); |
| f_vaddr += PAGE_SIZE; |
| usize -= PAGE_SIZE; |
| } |
| |
| return 0; |
| } |
| |
| pfn = (buf->dma_addr >> PAGE_SHIFT) + page_offset; |
| |
| return vm_insert_mixed(vma, f_vaddr, pfn); |
| } |
| |
| static int exynos_drm_gem_get_pages(struct drm_gem_object *obj) |
| { |
| struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); |
| struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; |
| struct scatterlist *sgl; |
| struct page **pages; |
| unsigned int npages, i = 0; |
| int ret; |
| |
| if (buf->pages) { |
| DRM_DEBUG_KMS("already allocated.\n"); |
| return -EINVAL; |
| } |
| |
| pages = exynos_gem_get_pages(obj, GFP_KERNEL); |
| if (IS_ERR(pages)) { |
| DRM_ERROR("failed to get pages.\n"); |
| return PTR_ERR(pages); |
| } |
| |
| npages = obj->size >> PAGE_SHIFT; |
| |
| buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL); |
| if (!buf->sgt) { |
| DRM_ERROR("failed to allocate sg table.\n"); |
| ret = -ENOMEM; |
| goto err; |
| } |
| |
| ret = sg_alloc_table(buf->sgt, npages, GFP_KERNEL); |
| if (ret < 0) { |
| DRM_ERROR("failed to initialize sg table.\n"); |
| ret = -EFAULT; |
| goto err1; |
| } |
| |
| sgl = buf->sgt->sgl; |
| |
| /* set all pages to sg list. */ |
| while (i < npages) { |
| sg_set_page(sgl, pages[i], PAGE_SIZE, 0); |
| sg_dma_address(sgl) = page_to_phys(pages[i]); |
| i++; |
| sgl = sg_next(sgl); |
| } |
| |
| /* add some codes for UNCACHED type here. TODO */ |
| |
| buf->pages = pages; |
| return ret; |
| err1: |
| kfree(buf->sgt); |
| buf->sgt = NULL; |
| err: |
| exynos_gem_put_pages(obj, pages, true, false); |
| return ret; |
| |
| } |
| |
| static void exynos_drm_gem_put_pages(struct drm_gem_object *obj) |
| { |
| struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); |
| struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; |
| |
| /* |
| * if buffer typs is EXYNOS_BO_NONCONTIG then release all pages |
| * allocated at gem fault handler. |
| */ |
| sg_free_table(buf->sgt); |
| kfree(buf->sgt); |
| buf->sgt = NULL; |
| |
| exynos_gem_put_pages(obj, buf->pages, true, false); |
| buf->pages = NULL; |
| |
| /* add some codes for UNCACHED type here. TODO */ |
| } |
| |
| static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, |
| struct drm_file *file_priv, |
| unsigned int *handle) |
| { |
| int ret; |
| |
| /* |
| * allocate a id of idr table where the obj is registered |
| * and handle has the id what user can see. |
| */ |
| ret = drm_gem_handle_create(file_priv, obj, handle); |
| if (ret) |
| return ret; |
| |
| DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); |
| |
| /* drop reference from allocate - handle holds it now. */ |
| drm_gem_object_unreference_unlocked(obj); |
| |
| return 0; |
| } |
| |
| void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) |
| { |
| struct drm_gem_object *obj; |
| |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| if (!exynos_gem_obj) |
| return; |
| |
| obj = &exynos_gem_obj->base; |
| |
| DRM_DEBUG_KMS("handle count = %d\n", atomic_read(&obj->handle_count)); |
| |
| if ((exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) && |
| exynos_gem_obj->buffer->pages) |
| exynos_drm_gem_put_pages(obj); |
| else |
| exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, |
| exynos_gem_obj->buffer); |
| |
| exynos_drm_fini_buf(obj->dev, exynos_gem_obj->buffer); |
| exynos_gem_obj->buffer = NULL; |
| |
| if (obj->map_list.map) |
| drm_gem_free_mmap_offset(obj); |
| |
| /* release file pointer to gem object. */ |
| drm_gem_object_release(obj); |
| |
| kfree(exynos_gem_obj); |
| exynos_gem_obj = NULL; |
| } |
| |
| static struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, |
| unsigned long size) |
| { |
| struct exynos_drm_gem_obj *exynos_gem_obj; |
| struct drm_gem_object *obj; |
| int ret; |
| |
| exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL); |
| if (!exynos_gem_obj) { |
| DRM_ERROR("failed to allocate exynos gem object\n"); |
| return NULL; |
| } |
| |
| exynos_gem_obj->size = size; |
| obj = &exynos_gem_obj->base; |
| |
| ret = drm_gem_object_init(dev, obj, size); |
| if (ret < 0) { |
| DRM_ERROR("failed to initialize gem object\n"); |
| kfree(exynos_gem_obj); |
| return NULL; |
| } |
| |
| DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp); |
| |
| return exynos_gem_obj; |
| } |
| |
| struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, |
| unsigned int flags, |
| unsigned long size) |
| { |
| struct exynos_drm_gem_obj *exynos_gem_obj; |
| struct exynos_drm_gem_buf *buf; |
| int ret; |
| |
| if (!size) { |
| DRM_ERROR("invalid size.\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| size = roundup_gem_size(size, flags); |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| ret = check_gem_flags(flags); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| buf = exynos_drm_init_buf(dev, size); |
| if (!buf) |
| return ERR_PTR(-ENOMEM); |
| |
| exynos_gem_obj = exynos_drm_gem_init(dev, size); |
| if (!exynos_gem_obj) { |
| ret = -ENOMEM; |
| goto err_fini_buf; |
| } |
| |
| exynos_gem_obj->buffer = buf; |
| |
| /* set memory type and cache attribute from user side. */ |
| exynos_gem_obj->flags = flags; |
| |
| /* |
| * allocate all pages as desired size if user wants to allocate |
| * physically non-continuous memory. |
| */ |
| if (flags & EXYNOS_BO_NONCONTIG) { |
| ret = exynos_drm_gem_get_pages(&exynos_gem_obj->base); |
| if (ret < 0) { |
| drm_gem_object_release(&exynos_gem_obj->base); |
| goto err_fini_buf; |
| } |
| } else { |
| ret = exynos_drm_alloc_buf(dev, buf, flags); |
| if (ret < 0) { |
| drm_gem_object_release(&exynos_gem_obj->base); |
| goto err_fini_buf; |
| } |
| } |
| |
| return exynos_gem_obj; |
| |
| err_fini_buf: |
| exynos_drm_fini_buf(dev, buf); |
| return ERR_PTR(ret); |
| } |
| |
| int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_exynos_gem_create *args = data; |
| struct exynos_drm_gem_obj *exynos_gem_obj; |
| int ret; |
| |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
| if (IS_ERR(exynos_gem_obj)) |
| return PTR_ERR(exynos_gem_obj); |
| |
| ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
| &args->handle); |
| if (ret) { |
| exynos_drm_gem_destroy(exynos_gem_obj); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| void *exynos_drm_gem_get_dma_addr(struct drm_device *dev, |
| unsigned int gem_handle, |
| struct drm_file *file_priv) |
| { |
| struct exynos_drm_gem_obj *exynos_gem_obj; |
| struct drm_gem_object *obj; |
| |
| obj = drm_gem_object_lookup(dev, file_priv, gem_handle); |
| if (!obj) { |
| DRM_ERROR("failed to lookup gem object.\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| exynos_gem_obj = to_exynos_gem_obj(obj); |
| |
| if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { |
| DRM_DEBUG_KMS("not support NONCONTIG type.\n"); |
| drm_gem_object_unreference_unlocked(obj); |
| |
| /* TODO */ |
| return ERR_PTR(-EINVAL); |
| } |
| |
| return &exynos_gem_obj->buffer->dma_addr; |
| } |
| |
| void exynos_drm_gem_put_dma_addr(struct drm_device *dev, |
| unsigned int gem_handle, |
| struct drm_file *file_priv) |
| { |
| struct exynos_drm_gem_obj *exynos_gem_obj; |
| struct drm_gem_object *obj; |
| |
| obj = drm_gem_object_lookup(dev, file_priv, gem_handle); |
| if (!obj) { |
| DRM_ERROR("failed to lookup gem object.\n"); |
| return; |
| } |
| |
| exynos_gem_obj = to_exynos_gem_obj(obj); |
| |
| if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { |
| DRM_DEBUG_KMS("not support NONCONTIG type.\n"); |
| drm_gem_object_unreference_unlocked(obj); |
| |
| /* TODO */ |
| return; |
| } |
| |
| drm_gem_object_unreference_unlocked(obj); |
| |
| /* |
| * decrease obj->refcount one more time because we has already |
| * increased it at exynos_drm_gem_get_dma_addr(). |
| */ |
| drm_gem_object_unreference_unlocked(obj); |
| } |
| |
| int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_exynos_gem_map_off *args = data; |
| |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| DRM_DEBUG_KMS("handle = 0x%x, offset = 0x%lx\n", |
| args->handle, (unsigned long)args->offset); |
| |
| if (!(dev->driver->driver_features & DRIVER_GEM)) { |
| DRM_ERROR("does not support GEM.\n"); |
| return -ENODEV; |
| } |
| |
| return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, |
| &args->offset); |
| } |
| |
| static int exynos_drm_gem_mmap_buffer(struct file *filp, |
| struct vm_area_struct *vma) |
| { |
| struct drm_gem_object *obj = filp->private_data; |
| struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); |
| struct exynos_drm_gem_buf *buffer; |
| unsigned long pfn, vm_size, usize, uaddr = vma->vm_start; |
| int ret; |
| |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| vma->vm_flags |= (VM_IO | VM_RESERVED); |
| |
| /* in case of direct mapping, always having non-cachable attribute */ |
| vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| |
| vm_size = usize = vma->vm_end - vma->vm_start; |
| |
| /* |
| * a buffer contains information to physically continuous memory |
| * allocated by user request or at framebuffer creation. |
| */ |
| buffer = exynos_gem_obj->buffer; |
| |
| /* check if user-requested size is valid. */ |
| if (vm_size > buffer->size) |
| return -EINVAL; |
| |
| if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) { |
| int i = 0; |
| |
| if (!buffer->pages) |
| return -EINVAL; |
| |
| do { |
| ret = vm_insert_page(vma, uaddr, buffer->pages[i++]); |
| if (ret) { |
| DRM_ERROR("failed to remap user space.\n"); |
| return ret; |
| } |
| |
| uaddr += PAGE_SIZE; |
| usize -= PAGE_SIZE; |
| } while (usize > 0); |
| } else { |
| /* |
| * get page frame number to physical memory to be mapped |
| * to user space. |
| */ |
| pfn = ((unsigned long)exynos_gem_obj->buffer->dma_addr) >> |
| PAGE_SHIFT; |
| |
| DRM_DEBUG_KMS("pfn = 0x%lx\n", pfn); |
| |
| if (remap_pfn_range(vma, vma->vm_start, pfn, vm_size, |
| vma->vm_page_prot)) { |
| DRM_ERROR("failed to remap pfn range.\n"); |
| return -EAGAIN; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const struct file_operations exynos_drm_gem_fops = { |
| .mmap = exynos_drm_gem_mmap_buffer, |
| }; |
| |
| int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_exynos_gem_mmap *args = data; |
| struct drm_gem_object *obj; |
| unsigned int addr; |
| |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| if (!(dev->driver->driver_features & DRIVER_GEM)) { |
| DRM_ERROR("does not support GEM.\n"); |
| return -ENODEV; |
| } |
| |
| obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
| if (!obj) { |
| DRM_ERROR("failed to lookup gem object.\n"); |
| return -EINVAL; |
| } |
| |
| obj->filp->f_op = &exynos_drm_gem_fops; |
| obj->filp->private_data = obj; |
| |
| down_write(¤t->mm->mmap_sem); |
| addr = do_mmap(obj->filp, 0, args->size, |
| PROT_READ | PROT_WRITE, MAP_SHARED, 0); |
| up_write(¤t->mm->mmap_sem); |
| |
| drm_gem_object_unreference_unlocked(obj); |
| |
| if (IS_ERR((void *)addr)) |
| return PTR_ERR((void *)addr); |
| |
| args->mapped = addr; |
| |
| DRM_DEBUG_KMS("mapped = 0x%lx\n", (unsigned long)args->mapped); |
| |
| return 0; |
| } |
| |
| int exynos_drm_gem_init_object(struct drm_gem_object *obj) |
| { |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| return 0; |
| } |
| |
| void exynos_drm_gem_free_object(struct drm_gem_object *obj) |
| { |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); |
| } |
| |
| int exynos_drm_gem_dumb_create(struct drm_file *file_priv, |
| struct drm_device *dev, |
| struct drm_mode_create_dumb *args) |
| { |
| struct exynos_drm_gem_obj *exynos_gem_obj; |
| int ret; |
| |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| /* |
| * alocate memory to be used for framebuffer. |
| * - this callback would be called by user application |
| * with DRM_IOCTL_MODE_CREATE_DUMB command. |
| */ |
| |
| args->pitch = args->width * args->bpp >> 3; |
| args->size = PAGE_ALIGN(args->pitch * args->height); |
| |
| exynos_gem_obj = exynos_drm_gem_create(dev, args->flags, args->size); |
| if (IS_ERR(exynos_gem_obj)) |
| return PTR_ERR(exynos_gem_obj); |
| |
| ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv, |
| &args->handle); |
| if (ret) { |
| exynos_drm_gem_destroy(exynos_gem_obj); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, |
| struct drm_device *dev, uint32_t handle, |
| uint64_t *offset) |
| { |
| struct exynos_drm_gem_obj *exynos_gem_obj; |
| struct drm_gem_object *obj; |
| int ret = 0; |
| |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| mutex_lock(&dev->struct_mutex); |
| |
| /* |
| * get offset of memory allocated for drm framebuffer. |
| * - this callback would be called by user application |
| * with DRM_IOCTL_MODE_MAP_DUMB command. |
| */ |
| |
| obj = drm_gem_object_lookup(dev, file_priv, handle); |
| if (!obj) { |
| DRM_ERROR("failed to lookup gem object.\n"); |
| ret = -EINVAL; |
| goto unlock; |
| } |
| |
| exynos_gem_obj = to_exynos_gem_obj(obj); |
| |
| if (!exynos_gem_obj->base.map_list.map) { |
| ret = drm_gem_create_mmap_offset(&exynos_gem_obj->base); |
| if (ret) |
| goto out; |
| } |
| |
| *offset = (u64)exynos_gem_obj->base.map_list.hash.key << PAGE_SHIFT; |
| DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); |
| |
| out: |
| drm_gem_object_unreference(obj); |
| unlock: |
| mutex_unlock(&dev->struct_mutex); |
| return ret; |
| } |
| |
| int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, |
| struct drm_device *dev, |
| unsigned int handle) |
| { |
| int ret; |
| |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| /* |
| * obj->refcount and obj->handle_count are decreased and |
| * if both them are 0 then exynos_drm_gem_free_object() |
| * would be called by callback to release resources. |
| */ |
| ret = drm_gem_handle_delete(file_priv, handle); |
| if (ret < 0) { |
| DRM_ERROR("failed to delete drm_gem_handle.\n"); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| struct drm_gem_object *obj = vma->vm_private_data; |
| struct drm_device *dev = obj->dev; |
| unsigned long f_vaddr; |
| pgoff_t page_offset; |
| int ret; |
| |
| page_offset = ((unsigned long)vmf->virtual_address - |
| vma->vm_start) >> PAGE_SHIFT; |
| f_vaddr = (unsigned long)vmf->virtual_address; |
| |
| mutex_lock(&dev->struct_mutex); |
| |
| ret = exynos_drm_gem_map_pages(obj, vma, f_vaddr, page_offset); |
| if (ret < 0) |
| DRM_ERROR("failed to map pages.\n"); |
| |
| mutex_unlock(&dev->struct_mutex); |
| |
| return convert_to_vm_err_msg(ret); |
| } |
| |
| int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) |
| { |
| int ret; |
| |
| DRM_DEBUG_KMS("%s\n", __FILE__); |
| |
| /* set vm_area_struct. */ |
| ret = drm_gem_mmap(filp, vma); |
| if (ret < 0) { |
| DRM_ERROR("failed to mmap.\n"); |
| return ret; |
| } |
| |
| vma->vm_flags &= ~VM_PFNMAP; |
| vma->vm_flags |= VM_MIXEDMAP; |
| |
| return ret; |
| } |