2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
3 * Author:Mark Yao <mark.yao@rock-chips.com>
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
17 #include <drm/drm_gem.h>
18 #include <drm/drm_sync_helper.h>
19 #include <drm/drm_vma_manager.h>
20 #include <drm/rockchip_drm.h>
22 #include <linux/completion.h>
23 #include <linux/dma-attrs.h>
24 #include <linux/dma-buf.h>
25 #include <linux/reservation.h>
26 #include <linux/iommu.h>
27 #include <linux/pagemap.h>
29 #include "rockchip_drm_drv.h"
30 #include "rockchip_drm_gem.h"
34 struct list_head list;
39 static int rockchip_gem_iommu_map(struct rockchip_gem_object *rk_obj)
41 struct drm_device *drm = rk_obj->base.dev;
42 struct rockchip_drm_private *private = drm->dev_private;
43 int prot = IOMMU_READ | IOMMU_WRITE;
46 mutex_lock(&private->mm_lock);
48 ret = drm_mm_insert_node_generic(&private->mm, &rk_obj->mm,
49 rk_obj->base.size, PAGE_SIZE,
52 mutex_unlock(&private->mm_lock);
54 DRM_ERROR("out of I/O virtual memory: %zd\n", ret);
58 rk_obj->dma_addr = rk_obj->mm.start;
60 ret = iommu_map_sg(private->domain, rk_obj->dma_addr, rk_obj->sgt->sgl,
61 rk_obj->sgt->nents, prot);
62 if (ret < rk_obj->base.size) {
63 DRM_ERROR("failed to map buffer: size=%zd request_size=%zd\n",
64 ret, rk_obj->base.size);
74 drm_mm_remove_node(&rk_obj->mm);
79 static int rockchip_gem_iommu_unmap(struct rockchip_gem_object *rk_obj)
81 struct drm_device *drm = rk_obj->base.dev;
82 struct rockchip_drm_private *private = drm->dev_private;
84 iommu_unmap(private->domain, rk_obj->dma_addr, rk_obj->size);
86 mutex_lock(&private->mm_lock);
88 drm_mm_remove_node(&rk_obj->mm);
90 mutex_unlock(&private->mm_lock);
95 static void rockchip_gem_free_list(struct list_head lists[])
97 struct page_info *info, *tmp_info;
100 for (i = 0; i < PG_ROUND; i++) {
101 list_for_each_entry_safe(info, tmp_info, &lists[i], list) {
102 list_del(&info->list);
108 static int rockchip_gem_get_pages(struct rockchip_gem_object *rk_obj)
110 struct drm_device *drm = rk_obj->base.dev;
112 struct scatterlist *s;
113 unsigned int cur_page;
114 struct page **pages, **dst_pages;
117 unsigned long chunk_pages;
118 unsigned long remain;
119 struct list_head lists[PG_ROUND];
122 unsigned int bit12_14;
123 unsigned int block_index[PG_ROUND] = {0};
124 struct page_info *info;
125 unsigned int maximum;
127 for (i = 0; i < PG_ROUND; i++)
128 INIT_LIST_HEAD(&lists[i]);
130 pages = drm_gem_get_pages(&rk_obj->base);
132 return PTR_ERR(pages);
134 rk_obj->pages = pages;
136 rk_obj->num_pages = rk_obj->base.size >> PAGE_SHIFT;
138 n_pages = rk_obj->num_pages;
140 dst_pages = drm_malloc_ab(n_pages, sizeof(struct page *));
148 /* look for the end of the current chunk */
150 for (j = cur_page + 1; j < n_pages; ++j) {
151 if (page_to_pfn(pages[j]) !=
152 page_to_pfn(pages[j - 1]) + 1)
156 chunk_pages = j - cur_page;
158 if (chunk_pages > 7) {
159 for (i = 0; i < chunk_pages; i++)
160 dst_pages[end + i] = pages[cur_page + i];
163 for (i = 0; i < chunk_pages; i++) {
164 info = kmalloc(sizeof(*info), GFP_KERNEL);
170 INIT_LIST_HEAD(&info->list);
171 info->page = pages[cur_page + i];
172 phys = page_to_phys(info->page);
173 bit12_14 = (phys >> 12) & 0x7;
174 list_add_tail(&info->list, &lists[bit12_14]);
175 block_index[bit12_14]++;
180 remain -= chunk_pages;
183 maximum = block_index[0];
184 for (i = 1; i < PG_ROUND; i++)
185 maximum = max(maximum, block_index[i]);
187 for (i = 0; i < maximum; i++) {
188 for (j = 0; j < PG_ROUND; j++) {
189 if (!list_empty(&lists[j])) {
190 struct page_info *info;
192 info = list_first_entry(&lists[j],
193 struct page_info, list);
194 dst_pages[end++] = info->page;
195 list_del(&info->list);
201 DRM_DEBUG_KMS("%s, %d, end = %d, n_pages = %d\n", __func__, __LINE__,
204 rk_obj->sgt = drm_prime_pages_to_sg(dst_pages, rk_obj->num_pages);
205 if (IS_ERR(rk_obj->sgt)) {
206 ret = PTR_ERR(rk_obj->sgt);
210 rk_obj->pages = dst_pages;
213 * Fake up the SG table so that dma_sync_sg_for_device() can be used
214 * to flush the pages associated with it.
216 * TODO: Replace this by drm_clflush_sg() once it can be implemented
217 * without relying on symbols that are not exported.
219 for_each_sg(rk_obj->sgt->sgl, s, rk_obj->sgt->nents, i)
220 sg_dma_address(s) = sg_phys(s);
222 dma_sync_sg_for_device(drm->dev, rk_obj->sgt->sgl, rk_obj->sgt->nents,
225 drm_free_large(pages);
230 rockchip_gem_free_list(lists);
231 drm_free_large(dst_pages);
233 drm_gem_put_pages(&rk_obj->base, rk_obj->pages, false, false);
237 static void rockchip_gem_put_pages(struct rockchip_gem_object *rk_obj)
239 sg_free_table(rk_obj->sgt);
241 drm_gem_put_pages(&rk_obj->base, rk_obj->pages, true, true);
244 static int rockchip_gem_alloc_iommu(struct rockchip_gem_object *rk_obj,
249 ret = rockchip_gem_get_pages(rk_obj);
253 ret = rockchip_gem_iommu_map(rk_obj);
258 rk_obj->kvaddr = vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP,
259 pgprot_writecombine(PAGE_KERNEL));
260 if (!rk_obj->kvaddr) {
261 DRM_ERROR("failed to vmap() buffer\n");
270 rockchip_gem_iommu_unmap(rk_obj);
272 rockchip_gem_put_pages(rk_obj);
277 static int rockchip_gem_alloc_dma(struct rockchip_gem_object *rk_obj,
280 struct drm_gem_object *obj = &rk_obj->base;
281 struct drm_device *drm = obj->dev;
283 init_dma_attrs(&rk_obj->dma_attrs);
284 dma_set_attr(DMA_ATTR_WRITE_COMBINE, &rk_obj->dma_attrs);
287 dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &rk_obj->dma_attrs);
289 rk_obj->kvaddr = dma_alloc_attrs(drm->dev, obj->size,
290 &rk_obj->dma_addr, GFP_KERNEL,
292 if (!rk_obj->kvaddr) {
293 DRM_ERROR("failed to allocate %zu byte dma buffer", obj->size);
300 static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj,
303 struct drm_gem_object *obj = &rk_obj->base;
304 struct drm_device *drm = obj->dev;
305 struct rockchip_drm_private *private = drm->dev_private;
308 return rockchip_gem_alloc_iommu(rk_obj, alloc_kmap);
310 return rockchip_gem_alloc_dma(rk_obj, alloc_kmap);
313 static void rockchip_gem_free_iommu(struct rockchip_gem_object *rk_obj)
315 vunmap(rk_obj->kvaddr);
316 rockchip_gem_iommu_unmap(rk_obj);
317 rockchip_gem_put_pages(rk_obj);
320 static void rockchip_gem_free_dma(struct rockchip_gem_object *rk_obj)
322 struct drm_gem_object *obj = &rk_obj->base;
323 struct drm_device *drm = obj->dev;
325 dma_free_attrs(drm->dev, obj->size, rk_obj->kvaddr,
326 rk_obj->dma_addr, &rk_obj->dma_attrs);
329 static void rockchip_gem_free_buf(struct rockchip_gem_object *rk_obj)
332 rockchip_gem_free_iommu(rk_obj);
334 rockchip_gem_free_dma(rk_obj);
337 static int rockchip_drm_gem_object_mmap_iommu(struct drm_gem_object *obj,
338 struct vm_area_struct *vma)
340 struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
341 unsigned int i, count = obj->size >> PAGE_SHIFT;
342 unsigned long user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
343 unsigned long uaddr = vma->vm_start;
344 unsigned long offset = vma->vm_pgoff;
345 unsigned long end = user_count + offset;
353 for (i = offset; i < end; i++) {
354 ret = vm_insert_page(vma, uaddr, rk_obj->pages[i]);
363 static int rockchip_drm_gem_object_mmap_dma(struct drm_gem_object *obj,
364 struct vm_area_struct *vma)
366 struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
367 struct drm_device *drm = obj->dev;
369 return dma_mmap_attrs(drm->dev, vma, rk_obj->kvaddr, rk_obj->dma_addr,
370 obj->size, &rk_obj->dma_attrs);
373 static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
374 struct vm_area_struct *vma)
377 struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
380 if (rk_obj->flags & ROCKCHIP_BO_CACHABLE)
381 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
384 * We allocated a struct page table for rk_obj, so clear
385 * VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
387 vma->vm_flags &= ~VM_PFNMAP;
390 ret = rockchip_drm_gem_object_mmap_iommu(obj, vma);
392 ret = rockchip_drm_gem_object_mmap_dma(obj, vma);
395 drm_gem_vm_close(vma);
400 int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
401 struct vm_area_struct *vma)
405 ret = drm_gem_mmap_obj(obj, obj->size, vma);
409 return rockchip_drm_gem_object_mmap(obj, vma);
412 /* drm driver mmap file operations */
413 int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma)
415 struct drm_gem_object *obj;
418 ret = drm_gem_mmap(filp, vma);
423 * Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
424 * whole buffer from the start.
428 obj = vma->vm_private_data;
430 return rockchip_drm_gem_object_mmap(obj, vma);
433 static struct rockchip_gem_object *
434 rockchip_gem_alloc_object(struct drm_device *drm, unsigned int size)
436 struct address_space *mapping;
437 struct rockchip_gem_object *rk_obj;
438 struct drm_gem_object *obj;
440 size = round_up(size, PAGE_SIZE);
442 rk_obj = kzalloc(sizeof(*rk_obj), GFP_KERNEL);
444 return ERR_PTR(-ENOMEM);
448 drm_gem_object_init(drm, obj, size);
450 if (IS_ENABLED(CONFIG_ARM_LPAE)) {
451 mapping = file_inode(obj->filp)->i_mapping;
452 mapping_set_gfp_mask(mapping,
453 mapping_gfp_mask(mapping) | __GFP_DMA32);
459 static void rockchip_gem_release_object(struct rockchip_gem_object *rk_obj)
461 drm_gem_object_release(&rk_obj->base);
465 struct rockchip_gem_object *
466 rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
469 struct rockchip_gem_object *rk_obj;
472 rk_obj = rockchip_gem_alloc_object(drm, size);
476 ret = rockchip_gem_alloc_buf(rk_obj, alloc_kmap);
478 goto err_free_rk_obj;
483 rockchip_gem_release_object(rk_obj);
488 * rockchip_gem_free_object - (struct drm_driver)->gem_free_object callback
491 void rockchip_gem_free_object(struct drm_gem_object *obj)
493 struct drm_device *drm = obj->dev;
494 struct rockchip_drm_private *private = drm->dev_private;
495 struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
497 if (obj->import_attach) {
498 if (private->domain) {
499 rockchip_gem_iommu_unmap(rk_obj);
501 dma_unmap_sg(drm->dev, rk_obj->sgt->sgl,
502 rk_obj->sgt->nents, DMA_BIDIRECTIONAL);
505 rockchip_gem_free_buf(rk_obj);
508 #ifdef CONFIG_DRM_DMA_SYNC
509 drm_fence_signal_and_put(&rk_obj->acquire_fence);
512 rockchip_gem_release_object(rk_obj);
516 * rockchip_gem_create_with_handle - allocate an object with the given
517 * size and create a gem handle on it
519 * returns a struct rockchip_gem_object* on success or ERR_PTR values
522 static struct rockchip_gem_object *
523 rockchip_gem_create_with_handle(struct drm_file *file_priv,
524 struct drm_device *drm, unsigned int size,
525 unsigned int *handle, unsigned int flags)
527 struct rockchip_gem_object *rk_obj;
528 struct drm_gem_object *obj;
531 rk_obj = rockchip_gem_create_object(drm, size, false);
533 return ERR_CAST(rk_obj);
538 * allocate a id of idr table where the obj is registered
539 * and handle has the id what user can see.
541 ret = drm_gem_handle_create(file_priv, obj, handle);
543 goto err_handle_create;
545 rk_obj->flags = flags;
547 /* drop reference from allocate - handle holds it now. */
548 drm_gem_object_unreference_unlocked(obj);
553 rockchip_gem_free_object(obj);
558 int rockchip_gem_dumb_map_offset(struct drm_file *file_priv,
559 struct drm_device *dev, uint32_t handle,
562 struct drm_gem_object *obj;
565 obj = drm_gem_object_lookup(dev, file_priv, handle);
567 DRM_ERROR("failed to lookup gem object.\n");
571 ret = drm_gem_create_mmap_offset(obj);
575 *offset = drm_vma_node_offset_addr(&obj->vma_node);
576 DRM_DEBUG_KMS("offset = 0x%llx\n", *offset);
579 drm_gem_object_unreference_unlocked(obj);
585 * rockchip_gem_dumb_create - (struct drm_driver)->dumb_create callback
588 * This aligns the pitch and size arguments to the minimum required. wrap
589 * this into your own function if you need bigger alignment.
591 int rockchip_gem_dumb_create(struct drm_file *file_priv,
592 struct drm_device *dev,
593 struct drm_mode_create_dumb *args)
595 struct rockchip_gem_object *rk_obj;
596 int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
599 * align to 64 bytes since Mali requires it.
601 args->pitch = ALIGN(min_pitch, 64);
602 args->size = args->pitch * args->height;
604 rk_obj = rockchip_gem_create_with_handle(file_priv, dev, args->size,
605 &args->handle, args->flags);
607 return PTR_ERR_OR_ZERO(rk_obj);
610 int rockchip_gem_map_offset_ioctl(struct drm_device *drm, void *data,
611 struct drm_file *file_priv)
613 struct drm_rockchip_gem_map_off *args = data;
615 return rockchip_gem_dumb_map_offset(file_priv, drm, args->handle,
619 int rockchip_gem_create_ioctl(struct drm_device *dev, void *data,
620 struct drm_file *file_priv)
622 struct drm_rockchip_gem_create *args = data;
623 struct rockchip_gem_object *rk_obj;
625 rk_obj = rockchip_gem_create_with_handle(file_priv, dev, args->size,
626 &args->handle, args->flags);
627 return PTR_ERR_OR_ZERO(rk_obj);
630 static struct reservation_object *drm_gem_get_resv(struct drm_gem_object *gem)
632 struct dma_buf *dma_buf = gem->dma_buf;
633 return dma_buf ? dma_buf->resv : NULL;
636 #ifdef CONFIG_DRM_DMA_SYNC
637 static void rockchip_gem_acquire_complete(struct drm_reservation_cb *rcb,
640 struct completion *compl = context;
644 static int rockchip_gem_acquire(struct drm_device *dev,
645 struct rockchip_gem_object *rockchip_gem_obj,
649 struct rockchip_drm_private *dev_priv = dev->dev_private;
650 struct reservation_object *resv =
651 drm_gem_get_resv(&rockchip_gem_obj->base);
653 struct drm_reservation_cb rcb;
654 DECLARE_COMPLETION_ONSTACK(compl);
660 !rockchip_gem_obj->acquire_exclusive &&
661 rockchip_gem_obj->acquire_fence) {
662 atomic_inc(&rockchip_gem_obj->acquire_shared_count);
666 fence = drm_sw_fence_new(dev_priv->cpu_fence_context,
667 atomic_add_return(1, &dev_priv->cpu_fence_seqno));
669 ret = PTR_ERR(fence);
670 DRM_ERROR("Failed to create acquire fence %d.\n", ret);
673 ww_mutex_lock(&resv->lock, NULL);
675 ret = reservation_object_reserve_shared(resv);
677 DRM_ERROR("Failed to reserve space for shared fence %d.\n",
682 drm_reservation_cb_init(&rcb, rockchip_gem_acquire_complete, &compl);
683 ret = drm_reservation_cb_add(&rcb, resv, exclusive);
685 DRM_ERROR("Failed to add reservation to callback %d.\n", ret);
688 drm_reservation_cb_done(&rcb);
690 reservation_object_add_excl_fence(resv, fence);
692 reservation_object_add_shared_fence(resv, fence);
694 ww_mutex_unlock(&resv->lock);
695 mutex_unlock(&dev->struct_mutex);
696 ret = wait_for_completion_interruptible(&compl);
697 mutex_lock(&dev->struct_mutex);
699 DRM_ERROR("Failed wait for reservation callback %d.\n", ret);
700 drm_reservation_cb_fini(&rcb);
701 /* somebody else may be already waiting on it */
702 drm_fence_signal_and_put(&fence);
705 rockchip_gem_obj->acquire_fence = fence;
706 rockchip_gem_obj->acquire_exclusive = exclusive;
707 atomic_set(&rockchip_gem_obj->acquire_shared_count, 1);
711 ww_mutex_unlock(&resv->lock);
716 static void rockchip_gem_release(struct rockchip_gem_object *rockchip_gem_obj)
718 BUG_ON(!rockchip_gem_obj->acquire_fence);
719 if (atomic_sub_and_test(1,
720 &rockchip_gem_obj->acquire_shared_count))
721 drm_fence_signal_and_put(&rockchip_gem_obj->acquire_fence);
725 int rockchip_gem_cpu_acquire_ioctl(struct drm_device *dev, void *data,
726 struct drm_file *file)
728 struct drm_rockchip_gem_cpu_acquire *args = data;
729 struct rockchip_drm_file_private *file_priv = file->driver_priv;
730 struct drm_gem_object *obj;
731 struct rockchip_gem_object *rockchip_gem_obj;
732 struct rockchip_gem_object_node *gem_node;
735 DRM_DEBUG_KMS("[BO:%u] flags: 0x%x\n", args->handle, args->flags);
737 mutex_lock(&dev->struct_mutex);
739 obj = drm_gem_object_lookup(dev, file, args->handle);
741 DRM_ERROR("failed to lookup gem object.\n");
746 rockchip_gem_obj = to_rockchip_obj(obj);
748 if (!drm_gem_get_resv(&rockchip_gem_obj->base)) {
749 /* If there is no reservation object present, there is no
750 * cross-process/cross-device sharing and sync is unnecessary.
756 #ifdef CONFIG_DRM_DMA_SYNC
757 ret = rockchip_gem_acquire(dev, rockchip_gem_obj,
758 args->flags & DRM_ROCKCHIP_GEM_CPU_ACQUIRE_EXCLUSIVE);
763 gem_node = kzalloc(sizeof(*gem_node), GFP_KERNEL);
765 DRM_ERROR("Failed to allocate rockchip_drm_gem_obj_node.\n");
770 gem_node->rockchip_gem_obj = rockchip_gem_obj;
771 list_add(&gem_node->list, &file_priv->gem_cpu_acquire_list);
772 mutex_unlock(&dev->struct_mutex);
776 #ifdef CONFIG_DRM_DMA_SYNC
777 rockchip_gem_release(rockchip_gem_obj);
780 drm_gem_object_unreference(obj);
783 mutex_unlock(&dev->struct_mutex);
787 int rockchip_gem_cpu_release_ioctl(struct drm_device *dev, void *data,
788 struct drm_file *file)
790 struct drm_rockchip_gem_cpu_release *args = data;
791 struct rockchip_drm_file_private *file_priv = file->driver_priv;
792 struct drm_gem_object *obj;
793 struct rockchip_gem_object *rockchip_gem_obj;
794 struct list_head *cur;
797 DRM_DEBUG_KMS("[BO:%u]\n", args->handle);
799 mutex_lock(&dev->struct_mutex);
801 obj = drm_gem_object_lookup(dev, file, args->handle);
803 DRM_ERROR("failed to lookup gem object.\n");
808 rockchip_gem_obj = to_rockchip_obj(obj);
810 if (!drm_gem_get_resv(&rockchip_gem_obj->base)) {
811 /* If there is no reservation object present, there is no
812 * cross-process/cross-device sharing and sync is unnecessary.
818 list_for_each(cur, &file_priv->gem_cpu_acquire_list) {
819 struct rockchip_gem_object_node *node = list_entry(
820 cur, struct rockchip_gem_object_node, list);
821 if (node->rockchip_gem_obj == rockchip_gem_obj)
824 if (cur == &file_priv->gem_cpu_acquire_list) {
825 DRM_ERROR("gem object not acquired for current process.\n");
830 #ifdef CONFIG_DRM_DMA_SYNC
831 rockchip_gem_release(rockchip_gem_obj);
835 kfree(list_entry(cur, struct rockchip_gem_object_node, list));
836 /* unreference for the reference held since cpu_acquire_ioctl */
837 drm_gem_object_unreference(obj);
841 /* unreference for the reference from drm_gem_object_lookup() */
842 drm_gem_object_unreference(obj);
845 mutex_unlock(&dev->struct_mutex);
850 * Allocate a sg_table for this GEM object.
851 * Note: Both the table's contents, and the sg_table itself must be freed by
853 * Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error.
855 struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj)
857 struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
858 struct drm_device *drm = obj->dev;
859 struct sg_table *sgt;
863 return drm_prime_pages_to_sg(rk_obj->pages, rk_obj->num_pages);
865 sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
867 return ERR_PTR(-ENOMEM);
869 ret = dma_get_sgtable_attrs(drm->dev, sgt, rk_obj->kvaddr,
870 rk_obj->dma_addr, obj->size,
873 DRM_ERROR("failed to allocate sgt, %d\n", ret);
881 static unsigned long rockchip_sg_get_contiguous_size(struct sg_table *sgt,
884 struct scatterlist *s;
885 dma_addr_t expected = sg_dma_address(sgt->sgl);
887 unsigned long size = 0;
889 for_each_sg(sgt->sgl, s, count, i) {
890 if (sg_dma_address(s) != expected)
892 expected = sg_dma_address(s) + sg_dma_len(s);
893 size += sg_dma_len(s);
899 rockchip_gem_iommu_map_sg(struct drm_device *drm,
900 struct dma_buf_attachment *attach,
902 struct rockchip_gem_object *rk_obj)
905 return rockchip_gem_iommu_map(rk_obj);
909 rockchip_gem_dma_map_sg(struct drm_device *drm,
910 struct dma_buf_attachment *attach,
912 struct rockchip_gem_object *rk_obj)
914 int count = dma_map_sg(drm->dev, sg->sgl, sg->nents,
919 if (rockchip_sg_get_contiguous_size(sg, count) < attach->dmabuf->size) {
920 DRM_ERROR("failed to map sg_table to contiguous linear address.\n");
921 dma_unmap_sg(drm->dev, sg->sgl, sg->nents,
926 rk_obj->dma_addr = sg_dma_address(sg->sgl);
931 struct drm_gem_object *
932 rockchip_gem_prime_import_sg_table(struct drm_device *drm,
933 struct dma_buf_attachment *attach,
936 struct rockchip_drm_private *private = drm->dev_private;
937 struct rockchip_gem_object *rk_obj;
940 rk_obj = rockchip_gem_alloc_object(drm, attach->dmabuf->size);
942 return ERR_CAST(rk_obj);
945 ret = rockchip_gem_iommu_map_sg(drm, attach, sg, rk_obj);
947 ret = rockchip_gem_dma_map_sg(drm, attach, sg, rk_obj);
950 DRM_ERROR("failed to import sg table: %d\n", ret);
951 goto err_free_rk_obj;
954 return &rk_obj->base;
957 rockchip_gem_release_object(rk_obj);
961 void *rockchip_gem_prime_vmap(struct drm_gem_object *obj)
963 struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
966 return vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP,
967 pgprot_writecombine(PAGE_KERNEL));
969 if (dma_get_attr(DMA_ATTR_NO_KERNEL_MAPPING, &rk_obj->dma_attrs))
972 return rk_obj->kvaddr;
975 void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
977 struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
984 /* Nothing to do if allocated by DMA mapping API. */