mirror of https://gitee.com/openkylin/linux.git
drm/exynos: added drm prime feature.
this patch adds exynos specific codes for DRM Prime feature. with this patch, user application can get file descriptor from gem handle through DRM_IOCTL_PRIME_HANDLE_TO_FD ioctl command(export) and also gem handle from file descriptor through DRM_IOCTL_PRIME_FD_TO_HANLDE(import) ioctl command. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Inki Dae
parent
c01d73faad
commit
b2df26c10b
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@ -10,6 +10,12 @@ config DRM_EXYNOS
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Choose this option if you have a Samsung SoC EXYNOS chipset.
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If M is selected the module will be called exynosdrm.
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config DRM_EXYNOS_DMABUF
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bool "EXYNOS DRM DMABUF"
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depends on DRM_EXYNOS
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help
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Choose this option if you want to use DMABUF feature for DRM.
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config DRM_EXYNOS_FIMD
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bool "Exynos DRM FIMD"
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depends on DRM_EXYNOS && !FB_S3C
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@ -8,6 +8,7 @@ exynosdrm-y := exynos_drm_drv.o exynos_drm_encoder.o exynos_drm_connector.o \
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exynos_drm_buf.o exynos_drm_gem.o exynos_drm_core.o \
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exynos_drm_plane.o
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exynosdrm-$(CONFIG_DRM_EXYNOS_DMABUF) += exynos_drm_dmabuf.o
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exynosdrm-$(CONFIG_DRM_EXYNOS_FIMD) += exynos_drm_fimd.o
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exynosdrm-$(CONFIG_DRM_EXYNOS_HDMI) += exynos_hdmi.o exynos_mixer.o \
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exynos_ddc.o exynos_hdmiphy.o \
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@ -35,7 +35,7 @@ static int lowlevel_buffer_allocate(struct drm_device *dev,
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unsigned int flags, struct exynos_drm_gem_buf *buf)
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{
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dma_addr_t start_addr;
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unsigned int npages, page_size, i = 0;
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unsigned int npages, i = 0;
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struct scatterlist *sgl;
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int ret = 0;
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@ -53,13 +53,13 @@ static int lowlevel_buffer_allocate(struct drm_device *dev,
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if (buf->size >= SZ_1M) {
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npages = buf->size >> SECTION_SHIFT;
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page_size = SECTION_SIZE;
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buf->page_size = SECTION_SIZE;
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} else if (buf->size >= SZ_64K) {
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npages = buf->size >> 16;
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page_size = SZ_64K;
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buf->page_size = SZ_64K;
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} else {
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npages = buf->size >> PAGE_SHIFT;
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page_size = PAGE_SIZE;
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buf->page_size = PAGE_SIZE;
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}
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buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
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@ -96,9 +96,9 @@ static int lowlevel_buffer_allocate(struct drm_device *dev,
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while (i < npages) {
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buf->pages[i] = phys_to_page(start_addr);
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sg_set_page(sgl, buf->pages[i], page_size, 0);
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sg_set_page(sgl, buf->pages[i], buf->page_size, 0);
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sg_dma_address(sgl) = start_addr;
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start_addr += page_size;
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start_addr += buf->page_size;
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sgl = sg_next(sgl);
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i++;
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}
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@ -0,0 +1,272 @@
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/* exynos_drm_dmabuf.c
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* Author: Inki Dae <inki.dae@samsung.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "drmP.h"
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#include "drm.h"
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#include "exynos_drm_drv.h"
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#include "exynos_drm_gem.h"
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#include <linux/dma-buf.h>
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static struct sg_table *exynos_pages_to_sg(struct page **pages, int nr_pages,
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unsigned int page_size)
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{
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struct sg_table *sgt = NULL;
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struct scatterlist *sgl;
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int i, ret;
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sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
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if (!sgt)
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goto out;
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ret = sg_alloc_table(sgt, nr_pages, GFP_KERNEL);
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if (ret)
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goto err_free_sgt;
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if (page_size < PAGE_SIZE)
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page_size = PAGE_SIZE;
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for_each_sg(sgt->sgl, sgl, nr_pages, i)
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sg_set_page(sgl, pages[i], page_size, 0);
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return sgt;
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err_free_sgt:
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kfree(sgt);
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sgt = NULL;
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out:
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return NULL;
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}
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static struct sg_table *
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exynos_gem_map_dma_buf(struct dma_buf_attachment *attach,
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enum dma_data_direction dir)
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{
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struct exynos_drm_gem_obj *gem_obj = attach->dmabuf->priv;
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struct drm_device *dev = gem_obj->base.dev;
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struct exynos_drm_gem_buf *buf;
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struct sg_table *sgt = NULL;
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unsigned int npages;
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int nents;
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DRM_DEBUG_PRIME("%s\n", __FILE__);
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mutex_lock(&dev->struct_mutex);
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buf = gem_obj->buffer;
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/* there should always be pages allocated. */
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if (!buf->pages) {
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DRM_ERROR("pages is null.\n");
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goto err_unlock;
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}
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npages = buf->size / buf->page_size;
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sgt = exynos_pages_to_sg(buf->pages, npages, buf->page_size);
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nents = dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir);
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DRM_DEBUG_PRIME("npages = %d buffer size = 0x%lx page_size = 0x%lx\n",
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npages, buf->size, buf->page_size);
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err_unlock:
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mutex_unlock(&dev->struct_mutex);
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return sgt;
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}
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static void exynos_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
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struct sg_table *sgt,
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enum dma_data_direction dir)
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{
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dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir);
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sg_free_table(sgt);
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kfree(sgt);
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sgt = NULL;
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}
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static void exynos_dmabuf_release(struct dma_buf *dmabuf)
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{
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struct exynos_drm_gem_obj *exynos_gem_obj = dmabuf->priv;
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DRM_DEBUG_PRIME("%s\n", __FILE__);
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/*
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* exynos_dmabuf_release() call means that file object's
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* f_count is 0 and it calls drm_gem_object_handle_unreference()
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* to drop the references that these values had been increased
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* at drm_prime_handle_to_fd()
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*/
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if (exynos_gem_obj->base.export_dma_buf == dmabuf) {
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exynos_gem_obj->base.export_dma_buf = NULL;
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/*
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* drop this gem object refcount to release allocated buffer
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* and resources.
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*/
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drm_gem_object_unreference_unlocked(&exynos_gem_obj->base);
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}
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}
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static void *exynos_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf,
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unsigned long page_num)
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{
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/* TODO */
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return NULL;
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}
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static void exynos_gem_dmabuf_kunmap_atomic(struct dma_buf *dma_buf,
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unsigned long page_num,
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void *addr)
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{
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/* TODO */
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}
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static void *exynos_gem_dmabuf_kmap(struct dma_buf *dma_buf,
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unsigned long page_num)
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{
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/* TODO */
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return NULL;
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}
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static void exynos_gem_dmabuf_kunmap(struct dma_buf *dma_buf,
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unsigned long page_num, void *addr)
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{
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/* TODO */
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}
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static struct dma_buf_ops exynos_dmabuf_ops = {
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.map_dma_buf = exynos_gem_map_dma_buf,
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.unmap_dma_buf = exynos_gem_unmap_dma_buf,
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.kmap = exynos_gem_dmabuf_kmap,
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.kmap_atomic = exynos_gem_dmabuf_kmap_atomic,
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.kunmap = exynos_gem_dmabuf_kunmap,
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.kunmap_atomic = exynos_gem_dmabuf_kunmap_atomic,
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.release = exynos_dmabuf_release,
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};
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struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev,
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struct drm_gem_object *obj, int flags)
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{
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struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj);
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return dma_buf_export(exynos_gem_obj, &exynos_dmabuf_ops,
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exynos_gem_obj->base.size, 0600);
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}
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struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev,
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struct dma_buf *dma_buf)
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{
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struct dma_buf_attachment *attach;
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struct sg_table *sgt;
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struct scatterlist *sgl;
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struct exynos_drm_gem_obj *exynos_gem_obj;
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struct exynos_drm_gem_buf *buffer;
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struct page *page;
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int ret, i = 0;
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DRM_DEBUG_PRIME("%s\n", __FILE__);
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/* is this one of own objects? */
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if (dma_buf->ops == &exynos_dmabuf_ops) {
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struct drm_gem_object *obj;
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exynos_gem_obj = dma_buf->priv;
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obj = &exynos_gem_obj->base;
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/* is it from our device? */
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if (obj->dev == drm_dev) {
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drm_gem_object_reference(obj);
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return obj;
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}
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}
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attach = dma_buf_attach(dma_buf, drm_dev->dev);
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if (IS_ERR(attach))
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return ERR_PTR(-EINVAL);
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sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
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if (IS_ERR(sgt)) {
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ret = PTR_ERR(sgt);
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goto err_buf_detach;
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}
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buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
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if (!buffer) {
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DRM_ERROR("failed to allocate exynos_drm_gem_buf.\n");
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ret = -ENOMEM;
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goto err_unmap_attach;
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}
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buffer->pages = kzalloc(sizeof(*page) * sgt->nents, GFP_KERNEL);
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if (!buffer->pages) {
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DRM_ERROR("failed to allocate pages.\n");
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ret = -ENOMEM;
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goto err_free_buffer;
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}
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exynos_gem_obj = exynos_drm_gem_init(drm_dev, dma_buf->size);
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if (!exynos_gem_obj) {
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ret = -ENOMEM;
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goto err_free_pages;
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}
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sgl = sgt->sgl;
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buffer->dma_addr = sg_dma_address(sgl);
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while (i < sgt->nents) {
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buffer->pages[i] = sg_page(sgl);
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buffer->size += sg_dma_len(sgl);
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sgl = sg_next(sgl);
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i++;
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}
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exynos_gem_obj->buffer = buffer;
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buffer->sgt = sgt;
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exynos_gem_obj->base.import_attach = attach;
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DRM_DEBUG_PRIME("dma_addr = 0x%x, size = 0x%lx\n", buffer->dma_addr,
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buffer->size);
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return &exynos_gem_obj->base;
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err_free_pages:
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kfree(buffer->pages);
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buffer->pages = NULL;
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err_free_buffer:
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kfree(buffer);
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buffer = NULL;
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err_unmap_attach:
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dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL);
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err_buf_detach:
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dma_buf_detach(dma_buf, attach);
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return ERR_PTR(ret);
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}
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MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
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MODULE_DESCRIPTION("Samsung SoC DRM DMABUF Module");
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MODULE_LICENSE("GPL");
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@ -0,0 +1,39 @@
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/* exynos_drm_dmabuf.h
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* Author: Inki Dae <inki.dae@samsung.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
|
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
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* and/or sell copies of the Software, and to permit persons to whom the
|
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
|
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _EXYNOS_DRM_DMABUF_H_
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#define _EXYNOS_DRM_DMABUF_H_
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#ifdef CONFIG_DRM_EXYNOS_DMABUF
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struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev,
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struct drm_gem_object *obj, int flags);
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struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev,
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struct dma_buf *dma_buf);
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#else
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#define exynos_dmabuf_prime_export NULL
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#define exynos_dmabuf_prime_import NULL
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#endif
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#endif
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@ -39,6 +39,7 @@
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#include "exynos_drm_gem.h"
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#include "exynos_drm_plane.h"
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#include "exynos_drm_vidi.h"
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#include "exynos_drm_dmabuf.h"
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#define DRIVER_NAME "exynos"
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#define DRIVER_DESC "Samsung SoC DRM"
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@ -149,6 +150,8 @@ static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
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{
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DRM_DEBUG_DRIVER("%s\n", __FILE__);
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drm_prime_init_file_private(&file->prime);
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return exynos_drm_subdrv_open(dev, file);
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}
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@ -170,6 +173,7 @@ static void exynos_drm_preclose(struct drm_device *dev,
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e->base.destroy(&e->base);
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}
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}
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drm_prime_destroy_file_private(&file->prime);
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spin_unlock_irqrestore(&dev->event_lock, flags);
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exynos_drm_subdrv_close(dev, file);
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@ -225,7 +229,7 @@ static const struct file_operations exynos_drm_driver_fops = {
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static struct drm_driver exynos_drm_driver = {
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.driver_features = DRIVER_HAVE_IRQ | DRIVER_BUS_PLATFORM |
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DRIVER_MODESET | DRIVER_GEM,
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DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
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.load = exynos_drm_load,
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.unload = exynos_drm_unload,
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.open = exynos_drm_open,
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@ -241,6 +245,10 @@ static struct drm_driver exynos_drm_driver = {
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.dumb_create = exynos_drm_gem_dumb_create,
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.dumb_map_offset = exynos_drm_gem_dumb_map_offset,
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.dumb_destroy = exynos_drm_gem_dumb_destroy,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_export = exynos_dmabuf_prime_export,
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.gem_prime_import = exynos_dmabuf_prime_import,
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.ioctls = exynos_ioctls,
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.fops = &exynos_drm_driver_fops,
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.name = DRIVER_NAME,
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@ -96,7 +96,7 @@ static unsigned long roundup_gem_size(unsigned long size, unsigned int flags)
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return roundup(size, PAGE_SIZE);
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}
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static struct page **exynos_gem_get_pages(struct drm_gem_object *obj,
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struct page **exynos_gem_get_pages(struct drm_gem_object *obj,
|
||||
gfp_t gfpmask)
|
||||
{
|
||||
struct inode *inode;
|
||||
|
|
@ -196,6 +196,7 @@ static int exynos_drm_gem_get_pages(struct drm_gem_object *obj)
|
|||
}
|
||||
|
||||
npages = obj->size >> PAGE_SHIFT;
|
||||
buf->page_size = PAGE_SIZE;
|
||||
|
||||
buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
|
||||
if (!buf->sgt) {
|
||||
|
|
@ -308,7 +309,7 @@ void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj)
|
|||
exynos_gem_obj = NULL;
|
||||
}
|
||||
|
||||
static struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
|
||||
struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
|
||||
unsigned long size)
|
||||
{
|
||||
struct exynos_drm_gem_obj *exynos_gem_obj;
|
||||
|
|
@ -612,8 +613,17 @@ int exynos_drm_gem_init_object(struct drm_gem_object *obj)
|
|||
|
||||
void exynos_drm_gem_free_object(struct drm_gem_object *obj)
|
||||
{
|
||||
struct exynos_drm_gem_obj *exynos_gem_obj;
|
||||
struct exynos_drm_gem_buf *buf;
|
||||
|
||||
DRM_DEBUG_KMS("%s\n", __FILE__);
|
||||
|
||||
exynos_gem_obj = to_exynos_gem_obj(obj);
|
||||
buf = exynos_gem_obj->buffer;
|
||||
|
||||
if (obj->import_attach)
|
||||
drm_prime_gem_destroy(obj, buf->sgt);
|
||||
|
||||
exynos_drm_gem_destroy(to_exynos_gem_obj(obj));
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -40,6 +40,7 @@
|
|||
* device address with IOMMU.
|
||||
* @sgt: sg table to transfer page data.
|
||||
* @pages: contain all pages to allocated memory region.
|
||||
* @page_size: could be 4K, 64K or 1MB.
|
||||
* @size: size of allocated memory region.
|
||||
*/
|
||||
struct exynos_drm_gem_buf {
|
||||
|
|
@ -47,6 +48,7 @@ struct exynos_drm_gem_buf {
|
|||
dma_addr_t dma_addr;
|
||||
struct sg_table *sgt;
|
||||
struct page **pages;
|
||||
unsigned long page_size;
|
||||
unsigned long size;
|
||||
};
|
||||
|
||||
|
|
@ -74,9 +76,15 @@ struct exynos_drm_gem_obj {
|
|||
unsigned int flags;
|
||||
};
|
||||
|
||||
struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
|
||||
|
||||
/* destroy a buffer with gem object */
|
||||
void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj);
|
||||
|
||||
/* create a private gem object and initialize it. */
|
||||
struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
|
||||
unsigned long size);
|
||||
|
||||
/* create a new buffer with gem object */
|
||||
struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
|
||||
unsigned int flags,
|
||||
|
|
|
|||
Loading…
Reference in New Issue