# SPDX-License-Identifier: GPL-2.0-only
-udl-y := udl_drv.o udl_modeset.o udl_connector.o udl_encoder.o udl_main.o udl_fb.o udl_transfer.o udl_gem.o udl_dmabuf.o
+udl-y := udl_drv.o udl_modeset.o udl_connector.o udl_encoder.o udl_main.o udl_fb.o udl_transfer.o udl_gem.o
obj-$(CONFIG_DRM_UDL) := udl.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * udl_dmabuf.c
- *
- * Copyright (c) 2014 The Chromium OS Authors
- */
-
-#include <linux/shmem_fs.h>
-#include <linux/dma-buf.h>
-
-#include <drm/drm_prime.h>
-
-#include "udl_drv.h"
-
-struct udl_drm_dmabuf_attachment {
- struct sg_table sgt;
- enum dma_data_direction dir;
- bool is_mapped;
-};
-
-static int udl_attach_dma_buf(struct dma_buf *dmabuf,
- struct dma_buf_attachment *attach)
-{
- struct udl_drm_dmabuf_attachment *udl_attach;
-
- DRM_DEBUG_PRIME("[DEV:%s] size:%zd\n", dev_name(attach->dev),
- attach->dmabuf->size);
-
- udl_attach = kzalloc(sizeof(*udl_attach), GFP_KERNEL);
- if (!udl_attach)
- return -ENOMEM;
-
- udl_attach->dir = DMA_NONE;
- attach->priv = udl_attach;
-
- return 0;
-}
-
-static void udl_detach_dma_buf(struct dma_buf *dmabuf,
- struct dma_buf_attachment *attach)
-{
- struct udl_drm_dmabuf_attachment *udl_attach = attach->priv;
- struct sg_table *sgt;
-
- if (!udl_attach)
- return;
-
- DRM_DEBUG_PRIME("[DEV:%s] size:%zd\n", dev_name(attach->dev),
- attach->dmabuf->size);
-
- sgt = &udl_attach->sgt;
-
- if (udl_attach->dir != DMA_NONE)
- dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents,
- udl_attach->dir);
-
- sg_free_table(sgt);
- kfree(udl_attach);
- attach->priv = NULL;
-}
-
-static struct sg_table *udl_map_dma_buf(struct dma_buf_attachment *attach,
- enum dma_data_direction dir)
-{
- struct udl_drm_dmabuf_attachment *udl_attach = attach->priv;
- struct udl_gem_object *obj = to_udl_bo(attach->dmabuf->priv);
- struct drm_device *dev = obj->base.dev;
- struct udl_device *udl = dev->dev_private;
- struct scatterlist *rd, *wr;
- struct sg_table *sgt = NULL;
- unsigned int i;
- int page_count;
- int nents, ret;
-
- DRM_DEBUG_PRIME("[DEV:%s] size:%zd dir=%d\n", dev_name(attach->dev),
- attach->dmabuf->size, dir);
-
- /* just return current sgt if already requested. */
- if (udl_attach->dir == dir && udl_attach->is_mapped)
- return &udl_attach->sgt;
-
- if (!obj->pages) {
- ret = udl_gem_get_pages(obj);
- if (ret) {
- DRM_ERROR("failed to map pages.\n");
- return ERR_PTR(ret);
- }
- }
-
- page_count = obj->base.size / PAGE_SIZE;
- obj->sg = drm_prime_pages_to_sg(obj->pages, page_count);
- if (IS_ERR(obj->sg)) {
- DRM_ERROR("failed to allocate sgt.\n");
- return ERR_CAST(obj->sg);
- }
-
- sgt = &udl_attach->sgt;
-
- ret = sg_alloc_table(sgt, obj->sg->orig_nents, GFP_KERNEL);
- if (ret) {
- DRM_ERROR("failed to alloc sgt.\n");
- return ERR_PTR(-ENOMEM);
- }
-
- mutex_lock(&udl->gem_lock);
-
- rd = obj->sg->sgl;
- wr = sgt->sgl;
- for (i = 0; i < sgt->orig_nents; ++i) {
- sg_set_page(wr, sg_page(rd), rd->length, rd->offset);
- rd = sg_next(rd);
- wr = sg_next(wr);
- }
-
- if (dir != DMA_NONE) {
- nents = dma_map_sg(attach->dev, sgt->sgl, sgt->orig_nents, dir);
- if (!nents) {
- DRM_ERROR("failed to map sgl with iommu.\n");
- sg_free_table(sgt);
- sgt = ERR_PTR(-EIO);
- goto err_unlock;
- }
- }
-
- udl_attach->is_mapped = true;
- udl_attach->dir = dir;
- attach->priv = udl_attach;
-
-err_unlock:
- mutex_unlock(&udl->gem_lock);
- return sgt;
-}
-
-static void udl_unmap_dma_buf(struct dma_buf_attachment *attach,
- struct sg_table *sgt,
- enum dma_data_direction dir)
-{
- /* Nothing to do. */
- DRM_DEBUG_PRIME("[DEV:%s] size:%zd dir:%d\n", dev_name(attach->dev),
- attach->dmabuf->size, dir);
-}
-
-static void *udl_dmabuf_kmap(struct dma_buf *dma_buf, unsigned long page_num)
-{
- /* TODO */
-
- return NULL;
-}
-
-static void udl_dmabuf_kunmap(struct dma_buf *dma_buf,
- unsigned long page_num, void *addr)
-{
- /* TODO */
-}
-
-static int udl_dmabuf_mmap(struct dma_buf *dma_buf,
- struct vm_area_struct *vma)
-{
- /* TODO */
-
- return -EINVAL;
-}
-
-static const struct dma_buf_ops udl_dmabuf_ops = {
- .attach = udl_attach_dma_buf,
- .detach = udl_detach_dma_buf,
- .map_dma_buf = udl_map_dma_buf,
- .unmap_dma_buf = udl_unmap_dma_buf,
- .map = udl_dmabuf_kmap,
- .unmap = udl_dmabuf_kunmap,
- .mmap = udl_dmabuf_mmap,
- .release = drm_gem_dmabuf_release,
-};
-
-struct dma_buf *udl_gem_prime_export(struct drm_gem_object *obj, int flags)
-{
- DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
-
- exp_info.ops = &udl_dmabuf_ops;
- exp_info.size = obj->size;
- exp_info.flags = flags;
- exp_info.priv = obj;
-
- return drm_gem_dmabuf_export(obj->dev, &exp_info);
-}
-
-static int udl_prime_create(struct drm_device *dev,
- size_t size,
- struct sg_table *sg,
- struct udl_gem_object **obj_p)
-{
- struct udl_gem_object *obj;
- int npages;
-
- npages = size / PAGE_SIZE;
-
- *obj_p = NULL;
- obj = udl_gem_alloc_object(dev, npages * PAGE_SIZE);
- if (!obj)
- return -ENOMEM;
-
- obj->sg = sg;
- obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
- if (obj->pages == NULL) {
- DRM_ERROR("obj pages is NULL %d\n", npages);
- return -ENOMEM;
- }
-
- drm_prime_sg_to_page_addr_arrays(sg, obj->pages, NULL, npages);
-
- *obj_p = obj;
- return 0;
-}
-
-struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
- struct dma_buf *dma_buf)
-{
- struct dma_buf_attachment *attach;
- struct sg_table *sg;
- struct udl_gem_object *uobj;
- int ret;
-
- /* need to attach */
- get_device(dev->dev);
- attach = dma_buf_attach(dma_buf, dev->dev);
- if (IS_ERR(attach)) {
- put_device(dev->dev);
- return ERR_CAST(attach);
- }
-
- get_dma_buf(dma_buf);
-
- sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
- if (IS_ERR(sg)) {
- ret = PTR_ERR(sg);
- goto fail_detach;
- }
-
- ret = udl_prime_create(dev, dma_buf->size, sg, &uobj);
- if (ret)
- goto fail_unmap;
-
- uobj->base.import_attach = attach;
-
- return &uobj->base;
-
-fail_unmap:
- dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL);
-fail_detach:
- dma_buf_detach(dma_buf, attach);
- dma_buf_put(dma_buf);
- put_device(dev->dev);
- return ERR_PTR(ret);
-}
#define to_udl(x) container_of(x, struct udl_device, drm)
-struct udl_gem_object {
- struct drm_gem_object base;
- struct page **pages;
- void *vmapping;
- struct sg_table *sg;
-};
-
-#define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
-
struct udl_framebuffer {
struct drm_framebuffer base;
- struct udl_gem_object *obj;
struct drm_gem_shmem_object *shmem;
bool active_16; /* active on the 16-bit channel */
};
u32 byte_offset, u32 device_byte_offset, u32 byte_width,
int *ident_ptr, int *sent_ptr);
-int udl_dumb_create(struct drm_file *file_priv,
- struct drm_device *dev,
- struct drm_mode_create_dumb *args);
-int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
- uint32_t handle, uint64_t *offset);
-
struct drm_gem_object *udl_driver_gem_create_object(struct drm_device *dev,
size_t size);
-void udl_gem_free_object(struct drm_gem_object *gem_obj);
-struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
- size_t size);
-struct dma_buf *udl_gem_prime_export(struct drm_gem_object *obj, int flags);
-struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
- struct dma_buf *dma_buf);
-
-int udl_gem_get_pages(struct udl_gem_object *obj);
-void udl_gem_put_pages(struct udl_gem_object *obj);
-int udl_gem_vmap(struct udl_gem_object *obj);
-void udl_gem_vunmap(struct udl_gem_object *obj);
-int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
-vm_fault_t udl_gem_fault(struct vm_fault *vmf);
int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
int width, int height);
return obj;
}
-
-struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
- size_t size)
-{
- struct drm_gem_object *obj;
-
- obj = dev->driver->gem_create_object(dev, size);
- if (obj == NULL)
- return NULL;
-
- if (drm_gem_object_init(dev, obj, size) != 0) {
- kfree(obj);
- return NULL;
- }
-
- return to_udl_bo(obj);
-}
-
-static int
-udl_gem_create(struct drm_file *file,
- struct drm_device *dev,
- uint64_t size,
- uint32_t *handle_p)
-{
- struct udl_gem_object *obj;
- int ret;
- u32 handle;
-
- size = roundup(size, PAGE_SIZE);
-
- obj = udl_gem_alloc_object(dev, size);
- if (obj == NULL)
- return -ENOMEM;
-
- ret = drm_gem_handle_create(file, &obj->base, &handle);
- if (ret) {
- drm_gem_object_release(&obj->base);
- kfree(obj);
- return ret;
- }
-
- drm_gem_object_put_unlocked(&obj->base);
- *handle_p = handle;
- return 0;
-}
-
-int udl_dumb_create(struct drm_file *file,
- struct drm_device *dev,
- struct drm_mode_create_dumb *args)
-{
- args->pitch = args->width * DIV_ROUND_UP(args->bpp, 8);
- args->size = args->pitch * args->height;
- return udl_gem_create(file, dev,
- args->size, &args->handle);
-}
-
-int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
-{
- struct drm_gem_object *obj;
- int ret;
-
- ret = drm_gem_mmap(filp, vma);
- if (ret)
- return ret;
-
- obj = vma->vm_private_data;
-
- vma->vm_flags &= ~VM_PFNMAP;
- vma->vm_flags |= VM_MIXEDMAP;
-
- vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
- if (obj->import_attach)
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
-
- return ret;
-}
-
-vm_fault_t udl_gem_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct udl_gem_object *obj = to_udl_bo(vma->vm_private_data);
- struct page *page;
- unsigned int page_offset;
-
- page_offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
-
- if (!obj->pages)
- return VM_FAULT_SIGBUS;
-
- page = obj->pages[page_offset];
- return vmf_insert_page(vma, vmf->address, page);
-}
-
-int udl_gem_get_pages(struct udl_gem_object *obj)
-{
- struct page **pages;
-
- if (obj->pages)
- return 0;
-
- pages = drm_gem_get_pages(&obj->base);
- if (IS_ERR(pages))
- return PTR_ERR(pages);
-
- obj->pages = pages;
-
- return 0;
-}
-
-void udl_gem_put_pages(struct udl_gem_object *obj)
-{
- if (obj->base.import_attach) {
- kvfree(obj->pages);
- obj->pages = NULL;
- return;
- }
-
- drm_gem_put_pages(&obj->base, obj->pages, false, false);
- obj->pages = NULL;
-}
-
-int udl_gem_vmap(struct udl_gem_object *obj)
-{
- int page_count = obj->base.size / PAGE_SIZE;
- int ret;
-
- if (obj->base.import_attach) {
- obj->vmapping = dma_buf_vmap(obj->base.import_attach->dmabuf);
- if (!obj->vmapping)
- return -ENOMEM;
- return 0;
- }
-
- ret = udl_gem_get_pages(obj);
- if (ret)
- return ret;
-
- obj->vmapping = vmap(obj->pages, page_count, 0, PAGE_KERNEL);
- if (!obj->vmapping)
- return -ENOMEM;
- return 0;
-}
-
-void udl_gem_vunmap(struct udl_gem_object *obj)
-{
- if (obj->base.import_attach) {
- dma_buf_vunmap(obj->base.import_attach->dmabuf, obj->vmapping);
- return;
- }
-
- vunmap(obj->vmapping);
-
- udl_gem_put_pages(obj);
-}
-
-void udl_gem_free_object(struct drm_gem_object *gem_obj)
-{
- struct udl_gem_object *obj = to_udl_bo(gem_obj);
-
- if (obj->vmapping)
- udl_gem_vunmap(obj);
-
- if (gem_obj->import_attach) {
- drm_prime_gem_destroy(gem_obj, obj->sg);
- put_device(gem_obj->dev->dev);
- }
-
- if (obj->pages)
- udl_gem_put_pages(obj);
-
- drm_gem_free_mmap_offset(gem_obj);
-}
-
-/* the dumb interface doesn't work with the GEM straight MMAP
- interface, it expects to do MMAP on the drm fd, like normal */
-int udl_gem_mmap(struct drm_file *file, struct drm_device *dev,
- uint32_t handle, uint64_t *offset)
-{
- struct udl_gem_object *gobj;
- struct drm_gem_object *obj;
- struct udl_device *udl = to_udl(dev);
- int ret = 0;
-
- mutex_lock(&udl->gem_lock);
- obj = drm_gem_object_lookup(file, handle);
- if (obj == NULL) {
- ret = -ENOENT;
- goto unlock;
- }
- gobj = to_udl_bo(obj);
-
- ret = udl_gem_get_pages(gobj);
- if (ret)
- goto out;
- ret = drm_gem_create_mmap_offset(obj);
- if (ret)
- goto out;
-
- *offset = drm_vma_node_offset_addr(&gobj->base.vma_node);
-
-out:
- drm_gem_object_put_unlocked(&gobj->base);
-unlock:
- mutex_unlock(&udl->gem_lock);
- return ret;
-}
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