drm/exynos: use prime helpers
The dma-buf codes of exynos drm is almost same with prime helpers. A difference is that consider DMA_NONE when import dma-buf, but it's wrong and we don't consider it any more, so we can use prime interface. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Joonyoung Shim
Inki Dae
parent
eb57da880b
commit
01ed50ddbd
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@ -5,7 +5,7 @@
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ccflags-y := -Iinclude/drm -Idrivers/gpu/drm/exynos
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exynosdrm-y := exynos_drm_drv.o exynos_drm_crtc.o exynos_drm_fbdev.o \
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exynos_drm_fb.o exynos_drm_buf.o exynos_drm_gem.o \
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exynos_drm_core.o exynos_drm_plane.o exynos_drm_dmabuf.o
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exynos_drm_core.o exynos_drm_plane.o
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exynosdrm-$(CONFIG_DRM_EXYNOS_IOMMU) += exynos_drm_iommu.o
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exynosdrm-$(CONFIG_DRM_EXYNOS_FIMD) += exynos_drm_fimd.o
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@ -1,289 +0,0 @@
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <drm/drmP.h>
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#include <drm/exynos_drm.h>
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#include "exynos_drm_dmabuf.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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struct exynos_drm_dmabuf_attachment {
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struct sg_table *sgt;
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enum dma_data_direction dir;
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bool is_mapped;
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};
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static struct exynos_drm_gem_obj *dma_buf_to_obj(struct dma_buf *buf)
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{
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return to_exynos_gem_obj(buf->priv);
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}
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static int exynos_gem_attach_dma_buf(struct dma_buf *dmabuf,
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struct device *dev,
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struct dma_buf_attachment *attach)
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{
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struct exynos_drm_dmabuf_attachment *exynos_attach;
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exynos_attach = kzalloc(sizeof(*exynos_attach), GFP_KERNEL);
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if (!exynos_attach)
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return -ENOMEM;
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exynos_attach->dir = DMA_NONE;
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attach->priv = exynos_attach;
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return 0;
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}
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static void exynos_gem_detach_dma_buf(struct dma_buf *dmabuf,
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struct dma_buf_attachment *attach)
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{
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struct exynos_drm_dmabuf_attachment *exynos_attach = attach->priv;
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struct sg_table *sgt;
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if (!exynos_attach)
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return;
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sgt = exynos_attach->sgt;
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if (sgt) {
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if (exynos_attach->dir != DMA_NONE)
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dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents,
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exynos_attach->dir);
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sg_free_table(sgt);
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}
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kfree(sgt);
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kfree(exynos_attach);
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attach->priv = 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_dmabuf_attachment *exynos_attach = attach->priv;
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struct exynos_drm_gem_obj *gem_obj = dma_buf_to_obj(attach->dmabuf);
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struct exynos_drm_gem_buf *buf;
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struct sg_table *sgt;
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int npages;
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/* just return current sgt if already requested. */
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if (exynos_attach->dir == dir && exynos_attach->is_mapped)
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return exynos_attach->sgt;
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buf = gem_obj->buffer;
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if (!buf) {
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DRM_ERROR("buffer is null.\n");
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return ERR_PTR(-ENOMEM);
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}
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npages = buf->size >> PAGE_SHIFT;
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sgt = drm_prime_pages_to_sg(buf->pages, npages);
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if (IS_ERR(sgt))
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goto err;
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if (dir != DMA_NONE) {
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if (!dma_map_sg(attach->dev, sgt->sgl, sgt->orig_nents, dir)) {
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DRM_ERROR("failed to map sgl with iommu.\n");
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sg_free_table(sgt);
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sgt = ERR_PTR(-EIO);
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goto err;
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}
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}
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exynos_attach->is_mapped = true;
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exynos_attach->sgt = sgt;
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exynos_attach->dir = dir;
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attach->priv = exynos_attach;
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DRM_DEBUG_PRIME("buffer size = 0x%lx\n", buf->size);
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err:
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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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/* Nothing to do. */
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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 int exynos_gem_dmabuf_mmap(struct dma_buf *dma_buf,
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struct vm_area_struct *vma)
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{
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return -ENOTTY;
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}
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static struct dma_buf_ops exynos_dmabuf_ops = {
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.attach = exynos_gem_attach_dma_buf,
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.detach = exynos_gem_detach_dma_buf,
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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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.mmap = exynos_gem_dmabuf_mmap,
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.release = drm_gem_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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DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
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exp_info.ops = &exynos_dmabuf_ops;
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exp_info.size = exynos_gem_obj->base.size;
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exp_info.flags = flags;
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exp_info.priv = obj;
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return dma_buf_export(&exp_info);
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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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int npages;
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int ret;
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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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obj = dma_buf->priv;
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/* is it from our device? */
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if (obj->dev == drm_dev) {
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/*
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* Importing dmabuf exported from out own gem increases
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* refcount on gem itself instead of f_count of dmabuf.
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*/
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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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get_dma_buf(dma_buf);
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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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ret = -ENOMEM;
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goto err_unmap_attach;
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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_buffer;
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}
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sgl = sgt->sgl;
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buffer->size = dma_buf->size;
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buffer->dma_addr = sg_dma_address(sgl);
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npages = dma_buf->size >> PAGE_SHIFT;
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buffer->pages = drm_malloc_ab(npages, sizeof(struct page *));
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if (!buffer->pages) {
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ret = -ENOMEM;
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goto err_free_gem;
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}
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ret = drm_prime_sg_to_page_addr_arrays(sgt, buffer->pages, NULL,
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npages);
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if (ret < 0) {
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drm_free_large(buffer->pages);
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goto err_free_gem;
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}
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if (sgt->nents == 1) {
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/* always physically continuous memory if sgt->nents is 1. */
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exynos_gem_obj->flags |= EXYNOS_BO_CONTIG;
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} else {
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/*
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* this case could be CONTIG or NONCONTIG type but for now
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* sets NONCONTIG.
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* TODO. we have to find a way that exporter can notify
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* the type of its own buffer to importer.
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*/
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exynos_gem_obj->flags |= EXYNOS_BO_NONCONTIG;
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}
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exynos_gem_obj->buffer = buffer;
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exynos_gem_obj->base.import_attach = attach;
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DRM_DEBUG_PRIME("dma_addr = %pad, 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_gem:
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drm_gem_object_release(&exynos_gem_obj->base);
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kfree(exynos_gem_obj);
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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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dma_buf_put(dma_buf);
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return ERR_PTR(ret);
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}
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@ -1,20 +0,0 @@
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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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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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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#endif
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@ -26,7 +26,6 @@
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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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#include "exynos_drm_g2d.h"
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#include "exynos_drm_ipp.h"
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#include "exynos_drm_iommu.h"
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@ -304,8 +303,12 @@ static struct drm_driver exynos_drm_driver = {
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.dumb_destroy = 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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.gem_prime_export = drm_gem_prime_export,
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.gem_prime_import = drm_gem_prime_import,
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.gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
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.gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table,
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.gem_prime_vmap = exynos_drm_gem_prime_vmap,
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.gem_prime_vunmap = exynos_drm_gem_prime_vunmap,
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.ioctls = exynos_ioctls,
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.num_ioctls = ARRAY_SIZE(exynos_ioctls),
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.fops = &exynos_drm_driver_fops,
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@ -13,6 +13,7 @@
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#include <drm/drm_vma_manager.h>
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#include <linux/shmem_fs.h>
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#include <linux/dma-buf.h>
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#include <drm/exynos_drm.h>
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#include "exynos_drm_drv.h"
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@ -577,3 +578,81 @@ err_close_vm:
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return ret;
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}
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/* low-level interface prime helpers */
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struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj)
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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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struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer;
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int npages;
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npages = buf->size >> PAGE_SHIFT;
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return drm_prime_pages_to_sg(buf->pages, npages);
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}
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struct drm_gem_object *
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exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sgt)
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{
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struct exynos_drm_gem_obj *exynos_gem_obj;
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struct exynos_drm_gem_buf *buf;
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int npages;
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int ret;
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buf = kzalloc(sizeof(*buf), GFP_KERNEL);
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if (!buf)
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return ERR_PTR(-ENOMEM);
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buf->size = attach->dmabuf->size;
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buf->dma_addr = sg_dma_address(sgt->sgl);
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npages = buf->size >> PAGE_SHIFT;
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buf->pages = drm_malloc_ab(npages, sizeof(struct page *));
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if (!buf->pages) {
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ret = -ENOMEM;
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goto err;
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}
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ret = drm_prime_sg_to_page_addr_arrays(sgt, buf->pages, NULL, npages);
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if (ret < 0)
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goto err_free_large;
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exynos_gem_obj = exynos_drm_gem_init(dev, buf->size);
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if (IS_ERR(exynos_gem_obj)) {
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ret = PTR_ERR(exynos_gem_obj);
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goto err;
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}
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if (sgt->nents == 1) {
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/* always physically continuous memory if sgt->nents is 1. */
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exynos_gem_obj->flags |= EXYNOS_BO_CONTIG;
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} else {
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/*
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* this case could be CONTIG or NONCONTIG type but for now
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* sets NONCONTIG.
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* TODO. we have to find a way that exporter can notify
|
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* the type of its own buffer to importer.
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*/
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exynos_gem_obj->flags |= EXYNOS_BO_NONCONTIG;
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}
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return &exynos_gem_obj->base;
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err_free_large:
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drm_free_large(buf->pages);
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err:
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kfree(buf);
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return ERR_PTR(ret);
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}
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void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj)
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{
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return NULL;
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}
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void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
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{
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/* Nothing to do */
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}
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|
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|
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@ -168,4 +168,13 @@ void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev,
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struct sg_table *sgt,
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enum dma_data_direction dir);
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/* low-level interface prime helpers */
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struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj);
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struct drm_gem_object *
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exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sgt);
|
||||
void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj);
|
||||
void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue