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Merge branch 'exynos-drm-next' of git://git.infradead.org/users/kmpar…
…k/linux-samsung into drm-core-next * 'exynos-drm-next' of git://git.infradead.org/users/kmpark/linux-samsung: drm/exynos: add G2D driver drm/exynos: added vp scaling feature for hdmi drm/exynos: added source size to overlay structure drm/exynos: add additional display mode for hdmi drm/exynos: enable dvi mode for dvi monitor drm/exynos: fixed wrong pageflip finish event for interlace mode drm/exynos: add PM functions for hdmi and mixer drm/exynos: add dpms for hdmi drm/exynos: use threaded irq for hdmi hotplug drm/exynos: use platform_get_irq_byname for hdmi drm/exynos: cleanup for hdmi platform data drm/exynos: added a feature to get gem buffer information. drm/exynos: added drm prime feature. drm/exynos: added cache attribute support for gem. vgaarb: Provide dummy default device functions
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,272 @@ | ||
| /* exynos_drm_dmabuf.c | ||
| * | ||
| * Copyright (c) 2012 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 "exynos_drm_drv.h" | ||
| #include "exynos_drm_gem.h" | ||
|
|
||
| #include <linux/dma-buf.h> | ||
|
|
||
| static struct sg_table *exynos_pages_to_sg(struct page **pages, int nr_pages, | ||
| unsigned int page_size) | ||
| { | ||
| struct sg_table *sgt = NULL; | ||
| struct scatterlist *sgl; | ||
| int i, ret; | ||
|
|
||
| sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); | ||
| if (!sgt) | ||
| goto out; | ||
|
|
||
| ret = sg_alloc_table(sgt, nr_pages, GFP_KERNEL); | ||
| if (ret) | ||
| goto err_free_sgt; | ||
|
|
||
| if (page_size < PAGE_SIZE) | ||
| page_size = PAGE_SIZE; | ||
|
|
||
| for_each_sg(sgt->sgl, sgl, nr_pages, i) | ||
| sg_set_page(sgl, pages[i], page_size, 0); | ||
|
|
||
| return sgt; | ||
|
|
||
| err_free_sgt: | ||
| kfree(sgt); | ||
| sgt = NULL; | ||
| out: | ||
| return NULL; | ||
| } | ||
|
|
||
| static struct sg_table * | ||
| exynos_gem_map_dma_buf(struct dma_buf_attachment *attach, | ||
| enum dma_data_direction dir) | ||
| { | ||
| struct exynos_drm_gem_obj *gem_obj = attach->dmabuf->priv; | ||
| struct drm_device *dev = gem_obj->base.dev; | ||
| struct exynos_drm_gem_buf *buf; | ||
| struct sg_table *sgt = NULL; | ||
| unsigned int npages; | ||
| int nents; | ||
|
|
||
| DRM_DEBUG_PRIME("%s\n", __FILE__); | ||
|
|
||
| mutex_lock(&dev->struct_mutex); | ||
|
|
||
| buf = gem_obj->buffer; | ||
|
|
||
| /* there should always be pages allocated. */ | ||
| if (!buf->pages) { | ||
| DRM_ERROR("pages is null.\n"); | ||
| goto err_unlock; | ||
| } | ||
|
|
||
| npages = buf->size / buf->page_size; | ||
|
|
||
| sgt = exynos_pages_to_sg(buf->pages, npages, buf->page_size); | ||
| nents = dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir); | ||
|
|
||
| DRM_DEBUG_PRIME("npages = %d buffer size = 0x%lx page_size = 0x%lx\n", | ||
| npages, buf->size, buf->page_size); | ||
|
|
||
| err_unlock: | ||
| mutex_unlock(&dev->struct_mutex); | ||
| return sgt; | ||
| } | ||
|
|
||
| static void exynos_gem_unmap_dma_buf(struct dma_buf_attachment *attach, | ||
| struct sg_table *sgt, | ||
| enum dma_data_direction dir) | ||
| { | ||
| dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir); | ||
| sg_free_table(sgt); | ||
| kfree(sgt); | ||
| sgt = NULL; | ||
| } | ||
|
|
||
| static void exynos_dmabuf_release(struct dma_buf *dmabuf) | ||
| { | ||
| struct exynos_drm_gem_obj *exynos_gem_obj = dmabuf->priv; | ||
|
|
||
| DRM_DEBUG_PRIME("%s\n", __FILE__); | ||
|
|
||
| /* | ||
| * exynos_dmabuf_release() call means that file object's | ||
| * f_count is 0 and it calls drm_gem_object_handle_unreference() | ||
| * to drop the references that these values had been increased | ||
| * at drm_prime_handle_to_fd() | ||
| */ | ||
| if (exynos_gem_obj->base.export_dma_buf == dmabuf) { | ||
| exynos_gem_obj->base.export_dma_buf = NULL; | ||
|
|
||
| /* | ||
| * drop this gem object refcount to release allocated buffer | ||
| * and resources. | ||
| */ | ||
| drm_gem_object_unreference_unlocked(&exynos_gem_obj->base); | ||
| } | ||
| } | ||
|
|
||
| static void *exynos_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf, | ||
| unsigned long page_num) | ||
| { | ||
| /* TODO */ | ||
|
|
||
| return NULL; | ||
| } | ||
|
|
||
| static void exynos_gem_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, | ||
| unsigned long page_num, | ||
| void *addr) | ||
| { | ||
| /* TODO */ | ||
| } | ||
|
|
||
| static void *exynos_gem_dmabuf_kmap(struct dma_buf *dma_buf, | ||
| unsigned long page_num) | ||
| { | ||
| /* TODO */ | ||
|
|
||
| return NULL; | ||
| } | ||
|
|
||
| static void exynos_gem_dmabuf_kunmap(struct dma_buf *dma_buf, | ||
| unsigned long page_num, void *addr) | ||
| { | ||
| /* TODO */ | ||
| } | ||
|
|
||
| static struct dma_buf_ops exynos_dmabuf_ops = { | ||
| .map_dma_buf = exynos_gem_map_dma_buf, | ||
| .unmap_dma_buf = exynos_gem_unmap_dma_buf, | ||
| .kmap = exynos_gem_dmabuf_kmap, | ||
| .kmap_atomic = exynos_gem_dmabuf_kmap_atomic, | ||
| .kunmap = exynos_gem_dmabuf_kunmap, | ||
| .kunmap_atomic = exynos_gem_dmabuf_kunmap_atomic, | ||
| .release = exynos_dmabuf_release, | ||
| }; | ||
|
|
||
| struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev, | ||
| struct drm_gem_object *obj, int flags) | ||
| { | ||
| struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); | ||
|
|
||
| return dma_buf_export(exynos_gem_obj, &exynos_dmabuf_ops, | ||
| exynos_gem_obj->base.size, 0600); | ||
| } | ||
|
|
||
| struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev, | ||
| struct dma_buf *dma_buf) | ||
| { | ||
| struct dma_buf_attachment *attach; | ||
| struct sg_table *sgt; | ||
| struct scatterlist *sgl; | ||
| struct exynos_drm_gem_obj *exynos_gem_obj; | ||
| struct exynos_drm_gem_buf *buffer; | ||
| struct page *page; | ||
| int ret, i = 0; | ||
|
|
||
| DRM_DEBUG_PRIME("%s\n", __FILE__); | ||
|
|
||
| /* is this one of own objects? */ | ||
| if (dma_buf->ops == &exynos_dmabuf_ops) { | ||
| struct drm_gem_object *obj; | ||
|
|
||
| exynos_gem_obj = dma_buf->priv; | ||
| obj = &exynos_gem_obj->base; | ||
|
|
||
| /* is it from our device? */ | ||
| if (obj->dev == drm_dev) { | ||
| drm_gem_object_reference(obj); | ||
| return obj; | ||
| } | ||
| } | ||
|
|
||
| attach = dma_buf_attach(dma_buf, drm_dev->dev); | ||
| if (IS_ERR(attach)) | ||
| return ERR_PTR(-EINVAL); | ||
|
|
||
|
|
||
| sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); | ||
| if (IS_ERR(sgt)) { | ||
| ret = PTR_ERR(sgt); | ||
| goto err_buf_detach; | ||
| } | ||
|
|
||
| buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); | ||
| if (!buffer) { | ||
| DRM_ERROR("failed to allocate exynos_drm_gem_buf.\n"); | ||
| ret = -ENOMEM; | ||
| goto err_unmap_attach; | ||
| } | ||
|
|
||
| buffer->pages = kzalloc(sizeof(*page) * sgt->nents, GFP_KERNEL); | ||
| if (!buffer->pages) { | ||
| DRM_ERROR("failed to allocate pages.\n"); | ||
| ret = -ENOMEM; | ||
| goto err_free_buffer; | ||
| } | ||
|
|
||
| exynos_gem_obj = exynos_drm_gem_init(drm_dev, dma_buf->size); | ||
| if (!exynos_gem_obj) { | ||
| ret = -ENOMEM; | ||
| goto err_free_pages; | ||
| } | ||
|
|
||
| sgl = sgt->sgl; | ||
| buffer->dma_addr = sg_dma_address(sgl); | ||
|
|
||
| while (i < sgt->nents) { | ||
| buffer->pages[i] = sg_page(sgl); | ||
| buffer->size += sg_dma_len(sgl); | ||
| sgl = sg_next(sgl); | ||
| i++; | ||
| } | ||
|
|
||
| exynos_gem_obj->buffer = buffer; | ||
| buffer->sgt = sgt; | ||
| exynos_gem_obj->base.import_attach = attach; | ||
|
|
||
| DRM_DEBUG_PRIME("dma_addr = 0x%x, size = 0x%lx\n", buffer->dma_addr, | ||
| buffer->size); | ||
|
|
||
| return &exynos_gem_obj->base; | ||
|
|
||
| err_free_pages: | ||
| kfree(buffer->pages); | ||
| buffer->pages = NULL; | ||
| err_free_buffer: | ||
| kfree(buffer); | ||
| buffer = NULL; | ||
| err_unmap_attach: | ||
| dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL); | ||
| err_buf_detach: | ||
| dma_buf_detach(dma_buf, attach); | ||
| return ERR_PTR(ret); | ||
| } | ||
|
|
||
| MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); | ||
| MODULE_DESCRIPTION("Samsung SoC DRM DMABUF Module"); | ||
| MODULE_LICENSE("GPL"); |
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