246 lines
5.2 KiB
C
246 lines
5.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_gem.h>
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#include <linux/dma-buf.h>
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#include <linux/reservation.h>
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#include "mtk_drm_drv.h"
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#include "mtk_drm_fb.h"
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#include "mtk_drm_gem.h"
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/*
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* mtk specific framebuffer structure.
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*
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* @fb: drm framebuffer object.
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* @gem_obj: array of gem objects.
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*/
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struct mtk_drm_fb {
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struct drm_framebuffer base;
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/* For now we only support a single plane */
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struct drm_gem_object *gem_obj;
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};
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#define to_mtk_fb(x) container_of(x, struct mtk_drm_fb, base)
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struct drm_gem_object *mtk_fb_get_gem_obj(struct drm_framebuffer *fb)
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{
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struct mtk_drm_fb *mtk_fb = to_mtk_fb(fb);
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return mtk_fb->gem_obj;
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}
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size_t mtk_fb_get_size(struct drm_framebuffer *fb)
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{
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struct mtk_drm_fb *mtk_fb = to_mtk_fb(fb);
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struct mtk_drm_gem_obj *mtk_gem = NULL;
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if (!mtk_fb->gem_obj)
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return 0;
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mtk_gem = to_mtk_gem_obj(mtk_fb->gem_obj);
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if (!mtk_gem)
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return 0;
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return mtk_gem->size;
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}
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dma_addr_t mtk_fb_get_dma(struct drm_framebuffer *fb)
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{
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struct mtk_drm_fb *mtk_fb = to_mtk_fb(fb);
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struct mtk_drm_gem_obj *mtk_gem = NULL;
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if (!mtk_fb->gem_obj)
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return 0;
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mtk_gem = to_mtk_gem_obj(mtk_fb->gem_obj);
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if (!mtk_gem)
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return 0;
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return mtk_gem->dma_addr;
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}
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int mtk_fb_get_sec_id(struct drm_framebuffer *fb)
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{
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struct mtk_drm_fb *mtk_fb = to_mtk_fb(fb);
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struct mtk_drm_gem_obj *mtk_gem = NULL;
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if (!mtk_fb->gem_obj)
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return -1;
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mtk_gem = to_mtk_gem_obj(mtk_fb->gem_obj);
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if (!mtk_gem)
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return -1;
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return mtk_gem->sec_id;
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}
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bool mtk_drm_fb_is_secure(struct drm_framebuffer *fb)
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{
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struct drm_gem_object *gem = NULL;
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struct mtk_drm_gem_obj *mtk_gem = NULL;
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if (!fb)
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return false;
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gem = mtk_fb_get_gem_obj(fb);
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if (!gem)
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return false;
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mtk_gem = to_mtk_gem_obj(gem);
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return mtk_gem->sec;
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}
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static int mtk_drm_fb_create_handle(struct drm_framebuffer *fb,
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struct drm_file *file_priv,
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unsigned int *handle)
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{
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struct mtk_drm_fb *mtk_fb = to_mtk_fb(fb);
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return drm_gem_handle_create(file_priv, mtk_fb->gem_obj, handle);
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}
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static void mtk_drm_fb_destroy(struct drm_framebuffer *fb)
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{
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struct mtk_drm_fb *mtk_fb = to_mtk_fb(fb);
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drm_framebuffer_cleanup(fb);
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drm_gem_object_unreference_unlocked(mtk_fb->gem_obj);
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kfree(mtk_fb);
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}
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static const struct drm_framebuffer_funcs mtk_drm_fb_funcs = {
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.create_handle = mtk_drm_fb_create_handle,
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.destroy = mtk_drm_fb_destroy,
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};
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static struct mtk_drm_fb *
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mtk_drm_framebuffer_init(struct drm_device *dev,
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const struct drm_mode_fb_cmd2 *mode,
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struct drm_gem_object *obj)
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{
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struct mtk_drm_fb *mtk_fb;
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int ret;
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mtk_fb = kzalloc(sizeof(*mtk_fb), GFP_KERNEL);
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if (!mtk_fb)
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return ERR_PTR(-ENOMEM);
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drm_helper_mode_fill_fb_struct(dev, &mtk_fb->base, mode);
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mtk_fb->gem_obj = obj;
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ret = drm_framebuffer_init(dev, &mtk_fb->base, &mtk_drm_fb_funcs);
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if (ret) {
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DRM_ERROR("failed to initialize framebuffer\n");
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kfree(mtk_fb);
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return ERR_PTR(ret);
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}
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return mtk_fb;
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}
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struct drm_framebuffer *
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mtk_drm_framebuffer_create(struct drm_device *dev,
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const struct drm_mode_fb_cmd2 *mode,
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struct drm_gem_object *obj)
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{
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struct mtk_drm_fb *mtk_fb;
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mtk_fb = mtk_drm_framebuffer_init(dev, mode, obj);
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if (IS_ERR(mtk_fb))
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return ERR_CAST(mtk_fb);
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return &mtk_fb->base;
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}
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/*
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* Wait for any exclusive fence in fb's gem object's reservation object.
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*
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* Returns -ERESTARTSYS if interrupted, else 0.
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*/
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int mtk_fb_wait(struct drm_framebuffer *fb)
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{
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struct drm_gem_object *gem;
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struct reservation_object *resv;
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long ret;
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if (!fb)
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return 0;
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gem = mtk_fb_get_gem_obj(fb);
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if (!gem || !gem->dma_buf || !gem->dma_buf->resv)
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return 0;
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resv = gem->dma_buf->resv;
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ret = reservation_object_wait_timeout_rcu(resv, false, true,
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MAX_SCHEDULE_TIMEOUT);
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/* MAX_SCHEDULE_TIMEOUT on success, -ERESTARTSYS if interrupted */
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if (ret < 0) {
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DDPAEE("%s:%d, invalid ret:%ld\n",
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__func__, __LINE__,
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ret);
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return ret;
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}
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return 0;
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}
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struct drm_framebuffer *
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mtk_drm_mode_fb_create(struct drm_device *dev, struct drm_file *file,
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const struct drm_mode_fb_cmd2 *cmd)
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{
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struct mtk_drm_fb *mtk_fb = NULL;
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struct drm_gem_object *gem = NULL;
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struct mtk_drm_gem_obj *mtk_gem = NULL;
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unsigned int width = cmd->width;
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unsigned int height = cmd->height;
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unsigned int size, bpp;
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int ret;
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if (cmd->pixel_format == DRM_FORMAT_C8)
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goto fb_init;
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gem = drm_gem_object_lookup(file, cmd->handles[0]);
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if (!gem)
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return ERR_PTR(-ENOENT);
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bpp = drm_format_plane_cpp(cmd->pixel_format, 0);
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size = (height - 1) * cmd->pitches[0] + width * bpp;
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size += cmd->offsets[0];
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mtk_gem = to_mtk_gem_obj(gem);
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if (gem->size < size && !mtk_gem->sec) {
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DRM_ERROR("%s:%d, size:(%ld,%d), sec:%d\n",
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__func__, __LINE__,
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gem->size, size,
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mtk_gem->sec);
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DRM_ERROR("w:%d, h:%d, bpp:(%d,%d), pitch:%d, offset:%d\n",
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width, height,
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cmd->pixel_format, bpp,
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cmd->pitches[0],
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cmd->offsets[0]);
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ret = -EINVAL;
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goto unreference;
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}
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fb_init:
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mtk_fb = mtk_drm_framebuffer_init(dev, cmd, gem);
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if (IS_ERR(mtk_fb)) {
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ret = PTR_ERR(mtk_fb);
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goto unreference;
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}
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return &mtk_fb->base;
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unreference:
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drm_gem_object_unreference_unlocked(gem);
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return ERR_PTR(ret);
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}
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