d6667f0ddf
Dumb buffers can be used in kms but also through prime with gallium's
resource_from_handle. In the second case the dumb buffers can be
rendered by the GPU where with the regular DRM kms interfaces they
are mapped and written to by the CPU. Because the same buffer can
be written to by the GPU and CPU vmwgfx needs to use vmw_surface (object
which properly tracks dirty state of the guest and gpu memory)
instead of vmw_bo (which is just guest side memory).
Furthermore the dumb buffer handles are expected to be gem objects by
a lot of userspace.
Make vmwgfx accept gem handles in prime and kms but internally switch
to vmw_surface's to properly track the dirty state of the objects between
the GPU and CPU.
Fixes new kwin and kde on wayland.
Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Fixes: b32233acceff ("drm/vmwgfx: Fix prime import/export")
Cc: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v6.9+
Reviewed-by: Maaz Mombasawala <maaz.mombasawala@broadcom.com>
Reviewed-by: Martin Krastev <martin.krastev@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240722184313.181318-4-zack.rusin@broadcom.com
125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/**************************************************************************
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*
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* Copyright (c) 2013-2024 Broadcom. All Rights Reserved. The term
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors:
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* Thomas Hellstrom <thellstrom@vmware.com>
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*
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*/
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#include "vmwgfx_drv.h"
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#include "vmwgfx_bo.h"
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#include "ttm_object.h"
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#include <linux/dma-buf.h>
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/*
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* DMA-BUF attach- and mapping methods. No need to implement
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* these until we have other virtual devices use them.
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*/
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static int vmw_prime_map_attach(struct dma_buf *dma_buf,
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struct dma_buf_attachment *attach)
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{
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return -ENOSYS;
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}
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static void vmw_prime_map_detach(struct dma_buf *dma_buf,
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struct dma_buf_attachment *attach)
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{
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}
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static struct sg_table *vmw_prime_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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return ERR_PTR(-ENOSYS);
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}
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static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
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struct sg_table *sgb,
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enum dma_data_direction dir)
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{
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}
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const struct dma_buf_ops vmw_prime_dmabuf_ops = {
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.attach = vmw_prime_map_attach,
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.detach = vmw_prime_map_detach,
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.map_dma_buf = vmw_prime_map_dma_buf,
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.unmap_dma_buf = vmw_prime_unmap_dma_buf,
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.release = NULL,
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};
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int vmw_prime_fd_to_handle(struct drm_device *dev,
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struct drm_file *file_priv,
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int fd, u32 *handle)
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{
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struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
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int ret = ttm_prime_fd_to_handle(tfile, fd, handle);
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if (ret)
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ret = drm_gem_prime_fd_to_handle(dev, file_priv, fd, handle);
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return ret;
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}
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int vmw_prime_handle_to_fd(struct drm_device *dev,
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struct drm_file *file_priv,
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uint32_t handle, uint32_t flags,
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int *prime_fd)
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{
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struct vmw_private *vmw = vmw_priv(dev);
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struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
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struct vmw_bo *vbo;
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int ret;
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int surf_handle;
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if (handle > VMWGFX_NUM_MOB) {
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ret = ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
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} else {
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ret = vmw_user_bo_lookup(file_priv, handle, &vbo);
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if (ret)
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return ret;
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if (vbo && vbo->is_dumb) {
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ret = drm_gem_prime_handle_to_fd(dev, file_priv, handle,
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flags, prime_fd);
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} else {
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surf_handle = vmw_lookup_surface_handle_for_buffer(vmw,
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vbo,
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handle);
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if (surf_handle > 0)
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ret = ttm_prime_handle_to_fd(tfile, surf_handle,
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flags, prime_fd);
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else
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ret = drm_gem_prime_handle_to_fd(dev, file_priv,
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handle, flags,
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prime_fd);
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}
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vmw_user_bo_unref(&vbo);
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}
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return ret;
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}
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