drm/amdgpu: rename amdgpu_prime.[ch] into amdgpu_dma_buf.[ch]

We are getting a dma-buf implementation completely separate from drm prime,
so rename the files now and cleanup the code a bit.

No functional change.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 0 insertions, 449 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
deleted file mode 100644
index a38e0fb4a6fe..000000000000
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+++ /dev/null
@@ -1,449 +0,0 @@
-/*
- * Copyright 2012 Advanced Micro Devices, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * based on nouveau_prime.c
- *
- * Authors: Alex Deucher
- */
-
-/**
- * DOC: PRIME Buffer Sharing
- *
- * The following callback implementations are used for :ref:`sharing GEM buffer
- * objects between different devices via PRIME <prime_buffer_sharing>`.
- */
-
-#include <drm/drmP.h>
-
-#include "amdgpu.h"
-#include "amdgpu_display.h"
-#include "amdgpu_gem.h"
-#include <drm/amdgpu_drm.h>
-#include <linux/dma-buf.h>
-#include <linux/dma-fence-array.h>
-
-/**
- * amdgpu_gem_prime_get_sg_table - &drm_driver.gem_prime_get_sg_table
- * implementation
- * @obj: GEM buffer object (BO)
- *
- * Returns:
- * A scatter/gather table for the pinned pages of the BO's memory.
- */
-struct sg_table *amdgpu_gem_prime_get_sg_table(struct drm_gem_object *obj)
-{
-	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
-	int npages = bo->tbo.num_pages;
-
-	return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages);
-}
-
-/**
- * amdgpu_gem_prime_vmap - &dma_buf_ops.vmap implementation
- * @obj: GEM BO
- *
- * Sets up an in-kernel virtual mapping of the BO's memory.
- *
- * Returns:
- * The virtual address of the mapping or an error pointer.
- */
-void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj)
-{
-	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
-	int ret;
-
-	ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
-			  &bo->dma_buf_vmap);
-	if (ret)
-		return ERR_PTR(ret);
-
-	return bo->dma_buf_vmap.virtual;
-}
-
-/**
- * amdgpu_gem_prime_vunmap - &dma_buf_ops.vunmap implementation
- * @obj: GEM BO
- * @vaddr: Virtual address (unused)
- *
- * Tears down the in-kernel virtual mapping of the BO's memory.
- */
-void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
-{
-	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
-
-	ttm_bo_kunmap(&bo->dma_buf_vmap);
-}
-
-/**
- * amdgpu_gem_prime_mmap - &drm_driver.gem_prime_mmap implementation
- * @obj: GEM BO
- * @vma: Virtual memory area
- *
- * Sets up a userspace mapping of the BO's memory in the given
- * virtual memory area.
- *
- * Returns:
- * 0 on success or a negative error code on failure.
- */
-int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
-{
-	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
-	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
-	unsigned asize = amdgpu_bo_size(bo);
-	int ret;
-
-	if (!vma->vm_file)
-		return -ENODEV;
-
-	if (adev == NULL)
-		return -ENODEV;
-
-	/* Check for valid size. */
-	if (asize < vma->vm_end - vma->vm_start)
-		return -EINVAL;
-
-	if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm) ||
-	    (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
-		return -EPERM;
-	}
-	vma->vm_pgoff += amdgpu_bo_mmap_offset(bo) >> PAGE_SHIFT;
-
-	/* prime mmap does not need to check access, so allow here */
-	ret = drm_vma_node_allow(&obj->vma_node, vma->vm_file->private_data);
-	if (ret)
-		return ret;
-
-	ret = ttm_bo_mmap(vma->vm_file, vma, &adev->mman.bdev);
-	drm_vma_node_revoke(&obj->vma_node, vma->vm_file->private_data);
-
-	return ret;
-}
-
-/**
- * amdgpu_gem_prime_import_sg_table - &drm_driver.gem_prime_import_sg_table
- * implementation
- * @dev: DRM device
- * @attach: DMA-buf attachment
- * @sg: Scatter/gather table
- *
- * Imports shared DMA buffer memory exported by another device.
- *
- * Returns:
- * A new GEM BO of the given DRM device, representing the memory
- * described by the given DMA-buf attachment and scatter/gather table.
- */
-struct drm_gem_object *
-amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
-				 struct dma_buf_attachment *attach,
-				 struct sg_table *sg)
-{
-	struct reservation_object *resv = attach->dmabuf->resv;
-	struct amdgpu_device *adev = dev->dev_private;
-	struct amdgpu_bo *bo;
-	struct amdgpu_bo_param bp;
-	int ret;
-
-	memset(&bp, 0, sizeof(bp));
-	bp.size = attach->dmabuf->size;
-	bp.byte_align = PAGE_SIZE;
-	bp.domain = AMDGPU_GEM_DOMAIN_CPU;
-	bp.flags = 0;
-	bp.type = ttm_bo_type_sg;
-	bp.resv = resv;
-	ww_mutex_lock(&resv->lock, NULL);
-	ret = amdgpu_bo_create(adev, &bp, &bo);
-	if (ret)
-		goto error;
-
-	bo->tbo.sg = sg;
-	bo->tbo.ttm->sg = sg;
-	bo->allowed_domains = AMDGPU_GEM_DOMAIN_GTT;
-	bo->preferred_domains = AMDGPU_GEM_DOMAIN_GTT;
-	if (attach->dmabuf->ops != &amdgpu_dmabuf_ops)
-		bo->prime_shared_count = 1;
-
-	ww_mutex_unlock(&resv->lock);
-	return &bo->gem_base;
-
-error:
-	ww_mutex_unlock(&resv->lock);
-	return ERR_PTR(ret);
-}
-
-static int
-__reservation_object_make_exclusive(struct reservation_object *obj)
-{
-	struct dma_fence **fences;
-	unsigned int count;
-	int r;
-
-	if (!reservation_object_get_list(obj)) /* no shared fences to convert */
-		return 0;
-
-	r = reservation_object_get_fences_rcu(obj, NULL, &count, &fences);
-	if (r)
-		return r;
-
-	if (count == 0) {
-		/* Now that was unexpected. */
-	} else if (count == 1) {
-		reservation_object_add_excl_fence(obj, fences[0]);
-		dma_fence_put(fences[0]);
-		kfree(fences);
-	} else {
-		struct dma_fence_array *array;
-
-		array = dma_fence_array_create(count, fences,
-					       dma_fence_context_alloc(1), 0,
-					       false);
-		if (!array)
-			goto err_fences_put;
-
-		reservation_object_add_excl_fence(obj, &array->base);
-		dma_fence_put(&array->base);
-	}
-
-	return 0;
-
-err_fences_put:
-	while (count--)
-		dma_fence_put(fences[count]);
-	kfree(fences);
-	return -ENOMEM;
-}
-
-/**
- * amdgpu_gem_map_attach - &dma_buf_ops.attach implementation
- * @dma_buf: Shared DMA buffer
- * @attach: DMA-buf attachment
- *
- * Makes sure that the shared DMA buffer can be accessed by the target device.
- * For now, simply pins it to the GTT domain, where it should be accessible by
- * all DMA devices.
- *
- * Returns:
- * 0 on success or a negative error code on failure.
- */
-static int amdgpu_gem_map_attach(struct dma_buf *dma_buf,
-				 struct dma_buf_attachment *attach)
-{
-	struct drm_gem_object *obj = dma_buf->priv;
-	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
-	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
-	long r;
-
-	r = drm_gem_map_attach(dma_buf, attach);
-	if (r)
-		return r;
-
-	r = amdgpu_bo_reserve(bo, false);
-	if (unlikely(r != 0))
-		goto error_detach;
-
-
-	if (attach->dev->driver != adev->dev->driver) {
-		/*
-		 * We only create shared fences for internal use, but importers
-		 * of the dmabuf rely on exclusive fences for implicitly
-		 * tracking write hazards. As any of the current fences may
-		 * correspond to a write, we need to convert all existing
-		 * fences on the reservation object into a single exclusive
-		 * fence.
-		 */
-		r = __reservation_object_make_exclusive(bo->tbo.resv);
-		if (r)
-			goto error_unreserve;
-	}
-
-	/* pin buffer into GTT */
-	r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT);
-	if (r)
-		goto error_unreserve;
-
-	if (attach->dev->driver != adev->dev->driver)
-		bo->prime_shared_count++;
-
-error_unreserve:
-	amdgpu_bo_unreserve(bo);
-
-error_detach:
-	if (r)
-		drm_gem_map_detach(dma_buf, attach);
-	return r;
-}
-
-/**
- * amdgpu_gem_map_detach - &dma_buf_ops.detach implementation
- * @dma_buf: Shared DMA buffer
- * @attach: DMA-buf attachment
- *
- * This is called when a shared DMA buffer no longer needs to be accessible by
- * another device. For now, simply unpins the buffer from GTT.
- */
-static void amdgpu_gem_map_detach(struct dma_buf *dma_buf,
-				  struct dma_buf_attachment *attach)
-{
-	struct drm_gem_object *obj = dma_buf->priv;
-	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
-	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
-	int ret = 0;
-
-	ret = amdgpu_bo_reserve(bo, true);
-	if (unlikely(ret != 0))
-		goto error;
-
-	amdgpu_bo_unpin(bo);
-	if (attach->dev->driver != adev->dev->driver && bo->prime_shared_count)
-		bo->prime_shared_count--;
-	amdgpu_bo_unreserve(bo);
-
-error:
-	drm_gem_map_detach(dma_buf, attach);
-}
-
-/**
- * amdgpu_gem_prime_res_obj - &drm_driver.gem_prime_res_obj implementation
- * @obj: GEM BO
- *
- * Returns:
- * The BO's reservation object.
- */
-struct reservation_object *amdgpu_gem_prime_res_obj(struct drm_gem_object *obj)
-{
-	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
-
-	return bo->tbo.resv;
-}
-
-/**
- * amdgpu_gem_begin_cpu_access - &dma_buf_ops.begin_cpu_access implementation
- * @dma_buf: Shared DMA buffer
- * @direction: Direction of DMA transfer
- *
- * This is called before CPU access to the shared DMA buffer's memory. If it's
- * a read access, the buffer is moved to the GTT domain if possible, for optimal
- * CPU read performance.
- *
- * Returns:
- * 0 on success or a negative error code on failure.
- */
-static int amdgpu_gem_begin_cpu_access(struct dma_buf *dma_buf,
-				       enum dma_data_direction direction)
-{
-	struct amdgpu_bo *bo = gem_to_amdgpu_bo(dma_buf->priv);
-	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
-	struct ttm_operation_ctx ctx = { true, false };
-	u32 domain = amdgpu_display_supported_domains(adev);
-	int ret;
-	bool reads = (direction == DMA_BIDIRECTIONAL ||
-		      direction == DMA_FROM_DEVICE);
-
-	if (!reads || !(domain & AMDGPU_GEM_DOMAIN_GTT))
-		return 0;
-
-	/* move to gtt */
-	ret = amdgpu_bo_reserve(bo, false);
-	if (unlikely(ret != 0))
-		return ret;
-
-	if (!bo->pin_count && (bo->allowed_domains & AMDGPU_GEM_DOMAIN_GTT)) {
-		amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT);
-		ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
-	}
-
-	amdgpu_bo_unreserve(bo);
-	return ret;
-}
-
-const struct dma_buf_ops amdgpu_dmabuf_ops = {
-	.attach = amdgpu_gem_map_attach,
-	.detach = amdgpu_gem_map_detach,
-	.map_dma_buf = drm_gem_map_dma_buf,
-	.unmap_dma_buf = drm_gem_unmap_dma_buf,
-	.release = drm_gem_dmabuf_release,
-	.begin_cpu_access = amdgpu_gem_begin_cpu_access,
-	.mmap = drm_gem_dmabuf_mmap,
-	.vmap = drm_gem_dmabuf_vmap,
-	.vunmap = drm_gem_dmabuf_vunmap,
-};
-
-/**
- * amdgpu_gem_prime_export - &drm_driver.gem_prime_export implementation
- * @dev: DRM device
- * @gobj: GEM BO
- * @flags: Flags such as DRM_CLOEXEC and DRM_RDWR.
- *
- * The main work is done by the &drm_gem_prime_export helper, which in turn
- * uses &amdgpu_gem_prime_res_obj.
- *
- * Returns:
- * Shared DMA buffer representing the GEM BO from the given device.
- */
-struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev,
-					struct drm_gem_object *gobj,
-					int flags)
-{
-	struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj);
-	struct dma_buf *buf;
-
-	if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm) ||
-	    bo->flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID)
-		return ERR_PTR(-EPERM);
-
-	buf = drm_gem_prime_export(dev, gobj, flags);
-	if (!IS_ERR(buf)) {
-		buf->file->f_mapping = dev->anon_inode->i_mapping;
-		buf->ops = &amdgpu_dmabuf_ops;
-	}
-
-	return buf;
-}
-
-/**
- * amdgpu_gem_prime_import - &drm_driver.gem_prime_import implementation
- * @dev: DRM device
- * @dma_buf: Shared DMA buffer
- *
- * The main work is done by the &drm_gem_prime_import helper, which in turn
- * uses &amdgpu_gem_prime_import_sg_table.
- *
- * Returns:
- * GEM BO representing the shared DMA buffer for the given device.
- */
-struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
-					    struct dma_buf *dma_buf)
-{
-	struct drm_gem_object *obj;
-
-	if (dma_buf->ops == &amdgpu_dmabuf_ops) {
-		obj = dma_buf->priv;
-		if (obj->dev == dev) {
-			/*
-			 * Importing dmabuf exported from out own gem increases
-			 * refcount on gem itself instead of f_count of dmabuf.
-			 */
-			drm_gem_object_get(obj);
-			return obj;
-		}
-	}
-
-	return drm_gem_prime_import(dev, dma_buf);
-}