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0b17fc08e3
Calculate GPU offset within vmwgfx driver itself without depending on bo->offset. Signed-off-by: Nirmoy Das <nirmoy.das@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/372933/ Signed-off-by: Christian König <christian.koenig@amd.com>
1175 lines
32 KiB
C
1175 lines
32 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/**************************************************************************
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*
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* Copyright © 2011-2018 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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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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#include <drm/ttm/ttm_placement.h>
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#include "vmwgfx_drv.h"
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#include "ttm_object.h"
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/**
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* struct vmw_user_buffer_object - User-space-visible buffer object
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*
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* @prime: The prime object providing user visibility.
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* @vbo: The struct vmw_buffer_object
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*/
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struct vmw_user_buffer_object {
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struct ttm_prime_object prime;
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struct vmw_buffer_object vbo;
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};
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/**
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* vmw_buffer_object - Convert a struct ttm_buffer_object to a struct
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* vmw_buffer_object.
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*
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* @bo: Pointer to the TTM buffer object.
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* Return: Pointer to the struct vmw_buffer_object embedding the
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* TTM buffer object.
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*/
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static struct vmw_buffer_object *
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vmw_buffer_object(struct ttm_buffer_object *bo)
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{
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return container_of(bo, struct vmw_buffer_object, base);
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}
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/**
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* vmw_user_buffer_object - Convert a struct ttm_buffer_object to a struct
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* vmw_user_buffer_object.
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*
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* @bo: Pointer to the TTM buffer object.
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* Return: Pointer to the struct vmw_buffer_object embedding the TTM buffer
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* object.
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*/
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static struct vmw_user_buffer_object *
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vmw_user_buffer_object(struct ttm_buffer_object *bo)
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{
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struct vmw_buffer_object *vmw_bo = vmw_buffer_object(bo);
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return container_of(vmw_bo, struct vmw_user_buffer_object, vbo);
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}
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/**
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* vmw_bo_pin_in_placement - Validate a buffer to placement.
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*
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* @dev_priv: Driver private.
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* @buf: DMA buffer to move.
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* @placement: The placement to pin it.
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* @interruptible: Use interruptible wait.
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* Return: Zero on success, Negative error code on failure. In particular
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* -ERESTARTSYS if interrupted by a signal
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*/
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int vmw_bo_pin_in_placement(struct vmw_private *dev_priv,
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struct vmw_buffer_object *buf,
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struct ttm_placement *placement,
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bool interruptible)
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{
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struct ttm_operation_ctx ctx = {interruptible, false };
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struct ttm_buffer_object *bo = &buf->base;
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int ret;
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uint32_t new_flags;
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ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
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if (unlikely(ret != 0))
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return ret;
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vmw_execbuf_release_pinned_bo(dev_priv);
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ret = ttm_bo_reserve(bo, interruptible, false, NULL);
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if (unlikely(ret != 0))
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goto err;
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if (buf->pin_count > 0)
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ret = ttm_bo_mem_compat(placement, &bo->mem,
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&new_flags) == true ? 0 : -EINVAL;
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else
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ret = ttm_bo_validate(bo, placement, &ctx);
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if (!ret)
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vmw_bo_pin_reserved(buf, true);
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ttm_bo_unreserve(bo);
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err:
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ttm_write_unlock(&dev_priv->reservation_sem);
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return ret;
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}
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/**
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* vmw_bo_pin_in_vram_or_gmr - Move a buffer to vram or gmr.
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*
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* This function takes the reservation_sem in write mode.
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* Flushes and unpins the query bo to avoid failures.
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*
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* @dev_priv: Driver private.
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* @buf: DMA buffer to move.
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* @pin: Pin buffer if true.
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* @interruptible: Use interruptible wait.
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* Return: Zero on success, Negative error code on failure. In particular
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* -ERESTARTSYS if interrupted by a signal
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*/
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int vmw_bo_pin_in_vram_or_gmr(struct vmw_private *dev_priv,
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struct vmw_buffer_object *buf,
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bool interruptible)
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{
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struct ttm_operation_ctx ctx = {interruptible, false };
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struct ttm_buffer_object *bo = &buf->base;
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int ret;
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uint32_t new_flags;
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ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
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if (unlikely(ret != 0))
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return ret;
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vmw_execbuf_release_pinned_bo(dev_priv);
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ret = ttm_bo_reserve(bo, interruptible, false, NULL);
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if (unlikely(ret != 0))
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goto err;
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if (buf->pin_count > 0) {
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ret = ttm_bo_mem_compat(&vmw_vram_gmr_placement, &bo->mem,
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&new_flags) == true ? 0 : -EINVAL;
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goto out_unreserve;
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}
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ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, &ctx);
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if (likely(ret == 0) || ret == -ERESTARTSYS)
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goto out_unreserve;
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ret = ttm_bo_validate(bo, &vmw_vram_placement, &ctx);
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out_unreserve:
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if (!ret)
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vmw_bo_pin_reserved(buf, true);
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ttm_bo_unreserve(bo);
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err:
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ttm_write_unlock(&dev_priv->reservation_sem);
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return ret;
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}
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/**
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* vmw_bo_pin_in_vram - Move a buffer to vram.
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*
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* This function takes the reservation_sem in write mode.
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* Flushes and unpins the query bo to avoid failures.
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*
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* @dev_priv: Driver private.
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* @buf: DMA buffer to move.
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* @interruptible: Use interruptible wait.
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* Return: Zero on success, Negative error code on failure. In particular
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* -ERESTARTSYS if interrupted by a signal
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*/
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int vmw_bo_pin_in_vram(struct vmw_private *dev_priv,
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struct vmw_buffer_object *buf,
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bool interruptible)
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{
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return vmw_bo_pin_in_placement(dev_priv, buf, &vmw_vram_placement,
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interruptible);
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}
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/**
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* vmw_bo_pin_in_start_of_vram - Move a buffer to start of vram.
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*
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* This function takes the reservation_sem in write mode.
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* Flushes and unpins the query bo to avoid failures.
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*
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* @dev_priv: Driver private.
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* @buf: DMA buffer to pin.
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* @interruptible: Use interruptible wait.
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* Return: Zero on success, Negative error code on failure. In particular
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* -ERESTARTSYS if interrupted by a signal
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*/
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int vmw_bo_pin_in_start_of_vram(struct vmw_private *dev_priv,
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struct vmw_buffer_object *buf,
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bool interruptible)
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{
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struct ttm_operation_ctx ctx = {interruptible, false };
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struct ttm_buffer_object *bo = &buf->base;
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struct ttm_placement placement;
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struct ttm_place place;
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int ret = 0;
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uint32_t new_flags;
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place = vmw_vram_placement.placement[0];
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place.lpfn = bo->num_pages;
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placement.num_placement = 1;
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placement.placement = &place;
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placement.num_busy_placement = 1;
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placement.busy_placement = &place;
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ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
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if (unlikely(ret != 0))
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return ret;
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vmw_execbuf_release_pinned_bo(dev_priv);
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ret = ttm_bo_reserve(bo, interruptible, false, NULL);
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if (unlikely(ret != 0))
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goto err_unlock;
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/*
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* Is this buffer already in vram but not at the start of it?
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* In that case, evict it first because TTM isn't good at handling
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* that situation.
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*/
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if (bo->mem.mem_type == TTM_PL_VRAM &&
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bo->mem.start < bo->num_pages &&
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bo->mem.start > 0 &&
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buf->pin_count == 0) {
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ctx.interruptible = false;
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(void) ttm_bo_validate(bo, &vmw_sys_placement, &ctx);
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}
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if (buf->pin_count > 0)
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ret = ttm_bo_mem_compat(&placement, &bo->mem,
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&new_flags) == true ? 0 : -EINVAL;
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else
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ret = ttm_bo_validate(bo, &placement, &ctx);
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/* For some reason we didn't end up at the start of vram */
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WARN_ON(ret == 0 && bo->mem.start != 0);
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if (!ret)
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vmw_bo_pin_reserved(buf, true);
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ttm_bo_unreserve(bo);
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err_unlock:
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ttm_write_unlock(&dev_priv->reservation_sem);
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return ret;
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}
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/**
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* vmw_bo_unpin - Unpin the buffer given buffer, does not move the buffer.
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*
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* This function takes the reservation_sem in write mode.
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*
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* @dev_priv: Driver private.
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* @buf: DMA buffer to unpin.
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* @interruptible: Use interruptible wait.
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* Return: Zero on success, Negative error code on failure. In particular
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* -ERESTARTSYS if interrupted by a signal
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*/
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int vmw_bo_unpin(struct vmw_private *dev_priv,
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struct vmw_buffer_object *buf,
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bool interruptible)
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{
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struct ttm_buffer_object *bo = &buf->base;
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int ret;
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ret = ttm_read_lock(&dev_priv->reservation_sem, interruptible);
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if (unlikely(ret != 0))
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return ret;
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ret = ttm_bo_reserve(bo, interruptible, false, NULL);
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if (unlikely(ret != 0))
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goto err;
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vmw_bo_pin_reserved(buf, false);
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ttm_bo_unreserve(bo);
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err:
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ttm_read_unlock(&dev_priv->reservation_sem);
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return ret;
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}
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/**
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* vmw_bo_get_guest_ptr - Get the guest ptr representing the current placement
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* of a buffer.
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*
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* @bo: Pointer to a struct ttm_buffer_object. Must be pinned or reserved.
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* @ptr: SVGAGuestPtr returning the result.
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*/
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void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *bo,
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SVGAGuestPtr *ptr)
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{
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if (bo->mem.mem_type == TTM_PL_VRAM) {
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ptr->gmrId = SVGA_GMR_FRAMEBUFFER;
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ptr->offset = bo->mem.start << PAGE_SHIFT;
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} else {
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ptr->gmrId = bo->mem.start;
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ptr->offset = 0;
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}
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}
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/**
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* vmw_bo_pin_reserved - Pin or unpin a buffer object without moving it.
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*
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* @vbo: The buffer object. Must be reserved.
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* @pin: Whether to pin or unpin.
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*
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*/
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void vmw_bo_pin_reserved(struct vmw_buffer_object *vbo, bool pin)
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{
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struct ttm_operation_ctx ctx = { false, true };
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struct ttm_place pl;
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struct ttm_placement placement;
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struct ttm_buffer_object *bo = &vbo->base;
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uint32_t old_mem_type = bo->mem.mem_type;
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int ret;
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dma_resv_assert_held(bo->base.resv);
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if (pin) {
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if (vbo->pin_count++ > 0)
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return;
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} else {
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WARN_ON(vbo->pin_count <= 0);
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if (--vbo->pin_count > 0)
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return;
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}
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pl.fpfn = 0;
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pl.lpfn = 0;
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pl.flags = TTM_PL_FLAG_VRAM | VMW_PL_FLAG_GMR | VMW_PL_FLAG_MOB
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| TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
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if (pin)
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pl.flags |= TTM_PL_FLAG_NO_EVICT;
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memset(&placement, 0, sizeof(placement));
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placement.num_placement = 1;
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placement.placement = &pl;
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ret = ttm_bo_validate(bo, &placement, &ctx);
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BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type);
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}
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/**
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* vmw_bo_map_and_cache - Map a buffer object and cache the map
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*
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* @vbo: The buffer object to map
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* Return: A kernel virtual address or NULL if mapping failed.
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*
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* This function maps a buffer object into the kernel address space, or
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* returns the virtual kernel address of an already existing map. The virtual
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* address remains valid as long as the buffer object is pinned or reserved.
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* The cached map is torn down on either
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* 1) Buffer object move
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* 2) Buffer object swapout
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* 3) Buffer object destruction
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*
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*/
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void *vmw_bo_map_and_cache(struct vmw_buffer_object *vbo)
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{
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struct ttm_buffer_object *bo = &vbo->base;
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bool not_used;
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void *virtual;
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int ret;
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virtual = ttm_kmap_obj_virtual(&vbo->map, ¬_used);
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if (virtual)
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return virtual;
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ret = ttm_bo_kmap(bo, 0, bo->num_pages, &vbo->map);
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if (ret)
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DRM_ERROR("Buffer object map failed: %d.\n", ret);
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return ttm_kmap_obj_virtual(&vbo->map, ¬_used);
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}
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/**
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* vmw_bo_unmap - Tear down a cached buffer object map.
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*
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* @vbo: The buffer object whose map we are tearing down.
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*
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* This function tears down a cached map set up using
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* vmw_buffer_object_map_and_cache().
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*/
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void vmw_bo_unmap(struct vmw_buffer_object *vbo)
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{
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if (vbo->map.bo == NULL)
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return;
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ttm_bo_kunmap(&vbo->map);
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}
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/**
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* vmw_bo_acc_size - Calculate the pinned memory usage of buffers
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*
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* @dev_priv: Pointer to a struct vmw_private identifying the device.
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* @size: The requested buffer size.
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* @user: Whether this is an ordinary dma buffer or a user dma buffer.
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*/
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static size_t vmw_bo_acc_size(struct vmw_private *dev_priv, size_t size,
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bool user)
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{
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static size_t struct_size, user_struct_size;
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size_t num_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
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size_t page_array_size = ttm_round_pot(num_pages * sizeof(void *));
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if (unlikely(struct_size == 0)) {
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size_t backend_size = ttm_round_pot(vmw_tt_size);
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struct_size = backend_size +
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ttm_round_pot(sizeof(struct vmw_buffer_object));
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user_struct_size = backend_size +
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ttm_round_pot(sizeof(struct vmw_user_buffer_object)) +
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TTM_OBJ_EXTRA_SIZE;
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}
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if (dev_priv->map_mode == vmw_dma_alloc_coherent)
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page_array_size +=
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ttm_round_pot(num_pages * sizeof(dma_addr_t));
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return ((user) ? user_struct_size : struct_size) +
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page_array_size;
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}
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/**
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* vmw_bo_bo_free - vmw buffer object destructor
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*
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* @bo: Pointer to the embedded struct ttm_buffer_object
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*/
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void vmw_bo_bo_free(struct ttm_buffer_object *bo)
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{
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struct vmw_buffer_object *vmw_bo = vmw_buffer_object(bo);
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WARN_ON(vmw_bo->dirty);
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WARN_ON(!RB_EMPTY_ROOT(&vmw_bo->res_tree));
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vmw_bo_unmap(vmw_bo);
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kfree(vmw_bo);
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}
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/**
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* vmw_user_bo_destroy - vmw buffer object destructor
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*
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* @bo: Pointer to the embedded struct ttm_buffer_object
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*/
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static void vmw_user_bo_destroy(struct ttm_buffer_object *bo)
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{
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struct vmw_user_buffer_object *vmw_user_bo = vmw_user_buffer_object(bo);
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struct vmw_buffer_object *vbo = &vmw_user_bo->vbo;
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WARN_ON(vbo->dirty);
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WARN_ON(!RB_EMPTY_ROOT(&vbo->res_tree));
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vmw_bo_unmap(vbo);
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ttm_prime_object_kfree(vmw_user_bo, prime);
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}
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/**
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* vmw_bo_init - Initialize a vmw buffer object
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*
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* @dev_priv: Pointer to the device private struct
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* @vmw_bo: Pointer to the struct vmw_buffer_object to initialize.
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* @size: Buffer object size in bytes.
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* @placement: Initial placement.
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* @interruptible: Whether waits should be performed interruptible.
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* @bo_free: The buffer object destructor.
|
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* Returns: Zero on success, negative error code on error.
|
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*
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* Note that on error, the code will free the buffer object.
|
|
*/
|
|
int vmw_bo_init(struct vmw_private *dev_priv,
|
|
struct vmw_buffer_object *vmw_bo,
|
|
size_t size, struct ttm_placement *placement,
|
|
bool interruptible,
|
|
void (*bo_free)(struct ttm_buffer_object *bo))
|
|
{
|
|
struct ttm_bo_device *bdev = &dev_priv->bdev;
|
|
size_t acc_size;
|
|
int ret;
|
|
bool user = (bo_free == &vmw_user_bo_destroy);
|
|
|
|
WARN_ON_ONCE(!bo_free && (!user && (bo_free != vmw_bo_bo_free)));
|
|
|
|
acc_size = vmw_bo_acc_size(dev_priv, size, user);
|
|
memset(vmw_bo, 0, sizeof(*vmw_bo));
|
|
BUILD_BUG_ON(TTM_MAX_BO_PRIORITY <= 3);
|
|
vmw_bo->base.priority = 3;
|
|
vmw_bo->res_tree = RB_ROOT;
|
|
|
|
ret = ttm_bo_init(bdev, &vmw_bo->base, size,
|
|
ttm_bo_type_device, placement,
|
|
0, interruptible, acc_size,
|
|
NULL, NULL, bo_free);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_user_bo_release - TTM reference base object release callback for
|
|
* vmw user buffer objects
|
|
*
|
|
* @p_base: The TTM base object pointer about to be unreferenced.
|
|
*
|
|
* Clears the TTM base object pointer and drops the reference the
|
|
* base object has on the underlying struct vmw_buffer_object.
|
|
*/
|
|
static void vmw_user_bo_release(struct ttm_base_object **p_base)
|
|
{
|
|
struct vmw_user_buffer_object *vmw_user_bo;
|
|
struct ttm_base_object *base = *p_base;
|
|
|
|
*p_base = NULL;
|
|
|
|
if (unlikely(base == NULL))
|
|
return;
|
|
|
|
vmw_user_bo = container_of(base, struct vmw_user_buffer_object,
|
|
prime.base);
|
|
ttm_bo_put(&vmw_user_bo->vbo.base);
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_user_bo_ref_obj-release - TTM synccpu reference object release callback
|
|
* for vmw user buffer objects
|
|
*
|
|
* @base: Pointer to the TTM base object
|
|
* @ref_type: Reference type of the reference reaching zero.
|
|
*
|
|
* Called when user-space drops its last synccpu reference on the buffer
|
|
* object, Either explicitly or as part of a cleanup file close.
|
|
*/
|
|
static void vmw_user_bo_ref_obj_release(struct ttm_base_object *base,
|
|
enum ttm_ref_type ref_type)
|
|
{
|
|
struct vmw_user_buffer_object *user_bo;
|
|
|
|
user_bo = container_of(base, struct vmw_user_buffer_object, prime.base);
|
|
|
|
switch (ref_type) {
|
|
case TTM_REF_SYNCCPU_WRITE:
|
|
atomic_dec(&user_bo->vbo.cpu_writers);
|
|
break;
|
|
default:
|
|
WARN_ONCE(true, "Undefined buffer object reference release.\n");
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_user_bo_alloc - Allocate a user buffer object
|
|
*
|
|
* @dev_priv: Pointer to a struct device private.
|
|
* @tfile: Pointer to a struct ttm_object_file on which to register the user
|
|
* object.
|
|
* @size: Size of the buffer object.
|
|
* @shareable: Boolean whether the buffer is shareable with other open files.
|
|
* @handle: Pointer to where the handle value should be assigned.
|
|
* @p_vbo: Pointer to where the refcounted struct vmw_buffer_object pointer
|
|
* should be assigned.
|
|
* Return: Zero on success, negative error code on error.
|
|
*/
|
|
int vmw_user_bo_alloc(struct vmw_private *dev_priv,
|
|
struct ttm_object_file *tfile,
|
|
uint32_t size,
|
|
bool shareable,
|
|
uint32_t *handle,
|
|
struct vmw_buffer_object **p_vbo,
|
|
struct ttm_base_object **p_base)
|
|
{
|
|
struct vmw_user_buffer_object *user_bo;
|
|
int ret;
|
|
|
|
user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL);
|
|
if (unlikely(!user_bo)) {
|
|
DRM_ERROR("Failed to allocate a buffer.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = vmw_bo_init(dev_priv, &user_bo->vbo, size,
|
|
(dev_priv->has_mob) ?
|
|
&vmw_sys_placement :
|
|
&vmw_vram_sys_placement, true,
|
|
&vmw_user_bo_destroy);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ttm_bo_get(&user_bo->vbo.base);
|
|
ret = ttm_prime_object_init(tfile,
|
|
size,
|
|
&user_bo->prime,
|
|
shareable,
|
|
ttm_buffer_type,
|
|
&vmw_user_bo_release,
|
|
&vmw_user_bo_ref_obj_release);
|
|
if (unlikely(ret != 0)) {
|
|
ttm_bo_put(&user_bo->vbo.base);
|
|
goto out_no_base_object;
|
|
}
|
|
|
|
*p_vbo = &user_bo->vbo;
|
|
if (p_base) {
|
|
*p_base = &user_bo->prime.base;
|
|
kref_get(&(*p_base)->refcount);
|
|
}
|
|
*handle = user_bo->prime.base.handle;
|
|
|
|
out_no_base_object:
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_user_bo_verify_access - verify access permissions on this
|
|
* buffer object.
|
|
*
|
|
* @bo: Pointer to the buffer object being accessed
|
|
* @tfile: Identifying the caller.
|
|
*/
|
|
int vmw_user_bo_verify_access(struct ttm_buffer_object *bo,
|
|
struct ttm_object_file *tfile)
|
|
{
|
|
struct vmw_user_buffer_object *vmw_user_bo;
|
|
|
|
if (unlikely(bo->destroy != vmw_user_bo_destroy))
|
|
return -EPERM;
|
|
|
|
vmw_user_bo = vmw_user_buffer_object(bo);
|
|
|
|
/* Check that the caller has opened the object. */
|
|
if (likely(ttm_ref_object_exists(tfile, &vmw_user_bo->prime.base)))
|
|
return 0;
|
|
|
|
DRM_ERROR("Could not grant buffer access.\n");
|
|
return -EPERM;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_user_bo_synccpu_grab - Grab a struct vmw_user_buffer_object for cpu
|
|
* access, idling previous GPU operations on the buffer and optionally
|
|
* blocking it for further command submissions.
|
|
*
|
|
* @user_bo: Pointer to the buffer object being grabbed for CPU access
|
|
* @tfile: Identifying the caller.
|
|
* @flags: Flags indicating how the grab should be performed.
|
|
* Return: Zero on success, Negative error code on error. In particular,
|
|
* -EBUSY will be returned if a dontblock operation is requested and the
|
|
* buffer object is busy, and -ERESTARTSYS will be returned if a wait is
|
|
* interrupted by a signal.
|
|
*
|
|
* A blocking grab will be automatically released when @tfile is closed.
|
|
*/
|
|
static int vmw_user_bo_synccpu_grab(struct vmw_user_buffer_object *user_bo,
|
|
struct ttm_object_file *tfile,
|
|
uint32_t flags)
|
|
{
|
|
bool nonblock = !!(flags & drm_vmw_synccpu_dontblock);
|
|
struct ttm_buffer_object *bo = &user_bo->vbo.base;
|
|
bool existed;
|
|
int ret;
|
|
|
|
if (flags & drm_vmw_synccpu_allow_cs) {
|
|
long lret;
|
|
|
|
lret = dma_resv_wait_timeout_rcu
|
|
(bo->base.resv, true, true,
|
|
nonblock ? 0 : MAX_SCHEDULE_TIMEOUT);
|
|
if (!lret)
|
|
return -EBUSY;
|
|
else if (lret < 0)
|
|
return lret;
|
|
return 0;
|
|
}
|
|
|
|
ret = ttm_bo_reserve(bo, true, nonblock, NULL);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ret = ttm_bo_wait(bo, true, nonblock);
|
|
if (likely(ret == 0))
|
|
atomic_inc(&user_bo->vbo.cpu_writers);
|
|
|
|
ttm_bo_unreserve(bo);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ret = ttm_ref_object_add(tfile, &user_bo->prime.base,
|
|
TTM_REF_SYNCCPU_WRITE, &existed, false);
|
|
if (ret != 0 || existed)
|
|
atomic_dec(&user_bo->vbo.cpu_writers);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmw_user_bo_synccpu_release - Release a previous grab for CPU access,
|
|
* and unblock command submission on the buffer if blocked.
|
|
*
|
|
* @handle: Handle identifying the buffer object.
|
|
* @tfile: Identifying the caller.
|
|
* @flags: Flags indicating the type of release.
|
|
*/
|
|
static int vmw_user_bo_synccpu_release(uint32_t handle,
|
|
struct ttm_object_file *tfile,
|
|
uint32_t flags)
|
|
{
|
|
if (!(flags & drm_vmw_synccpu_allow_cs))
|
|
return ttm_ref_object_base_unref(tfile, handle,
|
|
TTM_REF_SYNCCPU_WRITE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_user_bo_synccpu_ioctl - ioctl function implementing the synccpu
|
|
* functionality.
|
|
*
|
|
* @dev: Identifies the drm device.
|
|
* @data: Pointer to the ioctl argument.
|
|
* @file_priv: Identifies the caller.
|
|
* Return: Zero on success, negative error code on error.
|
|
*
|
|
* This function checks the ioctl arguments for validity and calls the
|
|
* relevant synccpu functions.
|
|
*/
|
|
int vmw_user_bo_synccpu_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_vmw_synccpu_arg *arg =
|
|
(struct drm_vmw_synccpu_arg *) data;
|
|
struct vmw_buffer_object *vbo;
|
|
struct vmw_user_buffer_object *user_bo;
|
|
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
|
|
struct ttm_base_object *buffer_base;
|
|
int ret;
|
|
|
|
if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0
|
|
|| (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write |
|
|
drm_vmw_synccpu_dontblock |
|
|
drm_vmw_synccpu_allow_cs)) != 0) {
|
|
DRM_ERROR("Illegal synccpu flags.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (arg->op) {
|
|
case drm_vmw_synccpu_grab:
|
|
ret = vmw_user_bo_lookup(tfile, arg->handle, &vbo,
|
|
&buffer_base);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
user_bo = container_of(vbo, struct vmw_user_buffer_object,
|
|
vbo);
|
|
ret = vmw_user_bo_synccpu_grab(user_bo, tfile, arg->flags);
|
|
vmw_bo_unreference(&vbo);
|
|
ttm_base_object_unref(&buffer_base);
|
|
if (unlikely(ret != 0 && ret != -ERESTARTSYS &&
|
|
ret != -EBUSY)) {
|
|
DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n",
|
|
(unsigned int) arg->handle);
|
|
return ret;
|
|
}
|
|
break;
|
|
case drm_vmw_synccpu_release:
|
|
ret = vmw_user_bo_synccpu_release(arg->handle, tfile,
|
|
arg->flags);
|
|
if (unlikely(ret != 0)) {
|
|
DRM_ERROR("Failed synccpu release on handle 0x%08x.\n",
|
|
(unsigned int) arg->handle);
|
|
return ret;
|
|
}
|
|
break;
|
|
default:
|
|
DRM_ERROR("Invalid synccpu operation.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_bo_alloc_ioctl - ioctl function implementing the buffer object
|
|
* allocation functionality.
|
|
*
|
|
* @dev: Identifies the drm device.
|
|
* @data: Pointer to the ioctl argument.
|
|
* @file_priv: Identifies the caller.
|
|
* Return: Zero on success, negative error code on error.
|
|
*
|
|
* This function checks the ioctl arguments for validity and allocates a
|
|
* struct vmw_user_buffer_object bo.
|
|
*/
|
|
int vmw_bo_alloc_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct vmw_private *dev_priv = vmw_priv(dev);
|
|
union drm_vmw_alloc_dmabuf_arg *arg =
|
|
(union drm_vmw_alloc_dmabuf_arg *)data;
|
|
struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
|
|
struct drm_vmw_dmabuf_rep *rep = &arg->rep;
|
|
struct vmw_buffer_object *vbo;
|
|
uint32_t handle;
|
|
int ret;
|
|
|
|
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ret = vmw_user_bo_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
|
|
req->size, false, &handle, &vbo,
|
|
NULL);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_bo;
|
|
|
|
rep->handle = handle;
|
|
rep->map_handle = drm_vma_node_offset_addr(&vbo->base.base.vma_node);
|
|
rep->cur_gmr_id = handle;
|
|
rep->cur_gmr_offset = 0;
|
|
|
|
vmw_bo_unreference(&vbo);
|
|
|
|
out_no_bo:
|
|
ttm_read_unlock(&dev_priv->reservation_sem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_bo_unref_ioctl - Generic handle close ioctl.
|
|
*
|
|
* @dev: Identifies the drm device.
|
|
* @data: Pointer to the ioctl argument.
|
|
* @file_priv: Identifies the caller.
|
|
* Return: Zero on success, negative error code on error.
|
|
*
|
|
* This function checks the ioctl arguments for validity and closes a
|
|
* handle to a TTM base object, optionally freeing the object.
|
|
*/
|
|
int vmw_bo_unref_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_vmw_unref_dmabuf_arg *arg =
|
|
(struct drm_vmw_unref_dmabuf_arg *)data;
|
|
|
|
return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
|
|
arg->handle,
|
|
TTM_REF_USAGE);
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_user_bo_lookup - Look up a vmw user buffer object from a handle.
|
|
*
|
|
* @tfile: The TTM object file the handle is registered with.
|
|
* @handle: The user buffer object handle
|
|
* @out: Pointer to a where a pointer to the embedded
|
|
* struct vmw_buffer_object should be placed.
|
|
* @p_base: Pointer to where a pointer to the TTM base object should be
|
|
* placed, or NULL if no such pointer is required.
|
|
* Return: Zero on success, Negative error code on error.
|
|
*
|
|
* Both the output base object pointer and the vmw buffer object pointer
|
|
* will be refcounted.
|
|
*/
|
|
int vmw_user_bo_lookup(struct ttm_object_file *tfile,
|
|
uint32_t handle, struct vmw_buffer_object **out,
|
|
struct ttm_base_object **p_base)
|
|
{
|
|
struct vmw_user_buffer_object *vmw_user_bo;
|
|
struct ttm_base_object *base;
|
|
|
|
base = ttm_base_object_lookup(tfile, handle);
|
|
if (unlikely(base == NULL)) {
|
|
DRM_ERROR("Invalid buffer object handle 0x%08lx.\n",
|
|
(unsigned long)handle);
|
|
return -ESRCH;
|
|
}
|
|
|
|
if (unlikely(ttm_base_object_type(base) != ttm_buffer_type)) {
|
|
ttm_base_object_unref(&base);
|
|
DRM_ERROR("Invalid buffer object handle 0x%08lx.\n",
|
|
(unsigned long)handle);
|
|
return -EINVAL;
|
|
}
|
|
|
|
vmw_user_bo = container_of(base, struct vmw_user_buffer_object,
|
|
prime.base);
|
|
ttm_bo_get(&vmw_user_bo->vbo.base);
|
|
if (p_base)
|
|
*p_base = base;
|
|
else
|
|
ttm_base_object_unref(&base);
|
|
*out = &vmw_user_bo->vbo;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_user_bo_noref_lookup - Look up a vmw user buffer object without reference
|
|
* @tfile: The TTM object file the handle is registered with.
|
|
* @handle: The user buffer object handle.
|
|
*
|
|
* This function looks up a struct vmw_user_bo and returns a pointer to the
|
|
* struct vmw_buffer_object it derives from without refcounting the pointer.
|
|
* The returned pointer is only valid until vmw_user_bo_noref_release() is
|
|
* called, and the object pointed to by the returned pointer may be doomed.
|
|
* Any persistent usage of the object requires a refcount to be taken using
|
|
* ttm_bo_reference_unless_doomed(). Iff this function returns successfully it
|
|
* needs to be paired with vmw_user_bo_noref_release() and no sleeping-
|
|
* or scheduling functions may be called inbetween these function calls.
|
|
*
|
|
* Return: A struct vmw_buffer_object pointer if successful or negative
|
|
* error pointer on failure.
|
|
*/
|
|
struct vmw_buffer_object *
|
|
vmw_user_bo_noref_lookup(struct ttm_object_file *tfile, u32 handle)
|
|
{
|
|
struct vmw_user_buffer_object *vmw_user_bo;
|
|
struct ttm_base_object *base;
|
|
|
|
base = ttm_base_object_noref_lookup(tfile, handle);
|
|
if (!base) {
|
|
DRM_ERROR("Invalid buffer object handle 0x%08lx.\n",
|
|
(unsigned long)handle);
|
|
return ERR_PTR(-ESRCH);
|
|
}
|
|
|
|
if (unlikely(ttm_base_object_type(base) != ttm_buffer_type)) {
|
|
ttm_base_object_noref_release();
|
|
DRM_ERROR("Invalid buffer object handle 0x%08lx.\n",
|
|
(unsigned long)handle);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
vmw_user_bo = container_of(base, struct vmw_user_buffer_object,
|
|
prime.base);
|
|
return &vmw_user_bo->vbo;
|
|
}
|
|
|
|
/**
|
|
* vmw_user_bo_reference - Open a handle to a vmw user buffer object.
|
|
*
|
|
* @tfile: The TTM object file to register the handle with.
|
|
* @vbo: The embedded vmw buffer object.
|
|
* @handle: Pointer to where the new handle should be placed.
|
|
* Return: Zero on success, Negative error code on error.
|
|
*/
|
|
int vmw_user_bo_reference(struct ttm_object_file *tfile,
|
|
struct vmw_buffer_object *vbo,
|
|
uint32_t *handle)
|
|
{
|
|
struct vmw_user_buffer_object *user_bo;
|
|
|
|
if (vbo->base.destroy != vmw_user_bo_destroy)
|
|
return -EINVAL;
|
|
|
|
user_bo = container_of(vbo, struct vmw_user_buffer_object, vbo);
|
|
|
|
*handle = user_bo->prime.base.handle;
|
|
return ttm_ref_object_add(tfile, &user_bo->prime.base,
|
|
TTM_REF_USAGE, NULL, false);
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_bo_fence_single - Utility function to fence a single TTM buffer
|
|
* object without unreserving it.
|
|
*
|
|
* @bo: Pointer to the struct ttm_buffer_object to fence.
|
|
* @fence: Pointer to the fence. If NULL, this function will
|
|
* insert a fence into the command stream..
|
|
*
|
|
* Contrary to the ttm_eu version of this function, it takes only
|
|
* a single buffer object instead of a list, and it also doesn't
|
|
* unreserve the buffer object, which needs to be done separately.
|
|
*/
|
|
void vmw_bo_fence_single(struct ttm_buffer_object *bo,
|
|
struct vmw_fence_obj *fence)
|
|
{
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
|
|
struct vmw_private *dev_priv =
|
|
container_of(bdev, struct vmw_private, bdev);
|
|
|
|
if (fence == NULL) {
|
|
vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
|
|
dma_resv_add_excl_fence(bo->base.resv, &fence->base);
|
|
dma_fence_put(&fence->base);
|
|
} else
|
|
dma_resv_add_excl_fence(bo->base.resv, &fence->base);
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_dumb_create - Create a dumb kms buffer
|
|
*
|
|
* @file_priv: Pointer to a struct drm_file identifying the caller.
|
|
* @dev: Pointer to the drm device.
|
|
* @args: Pointer to a struct drm_mode_create_dumb structure
|
|
* Return: Zero on success, negative error code on failure.
|
|
*
|
|
* This is a driver callback for the core drm create_dumb functionality.
|
|
* Note that this is very similar to the vmw_bo_alloc ioctl, except
|
|
* that the arguments have a different format.
|
|
*/
|
|
int vmw_dumb_create(struct drm_file *file_priv,
|
|
struct drm_device *dev,
|
|
struct drm_mode_create_dumb *args)
|
|
{
|
|
struct vmw_private *dev_priv = vmw_priv(dev);
|
|
struct vmw_buffer_object *vbo;
|
|
int ret;
|
|
|
|
args->pitch = args->width * ((args->bpp + 7) / 8);
|
|
args->size = args->pitch * args->height;
|
|
|
|
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ret = vmw_user_bo_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
|
|
args->size, false, &args->handle,
|
|
&vbo, NULL);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_bo;
|
|
|
|
vmw_bo_unreference(&vbo);
|
|
out_no_bo:
|
|
ttm_read_unlock(&dev_priv->reservation_sem);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_dumb_map_offset - Return the address space offset of a dumb buffer
|
|
*
|
|
* @file_priv: Pointer to a struct drm_file identifying the caller.
|
|
* @dev: Pointer to the drm device.
|
|
* @handle: Handle identifying the dumb buffer.
|
|
* @offset: The address space offset returned.
|
|
* Return: Zero on success, negative error code on failure.
|
|
*
|
|
* This is a driver callback for the core drm dumb_map_offset functionality.
|
|
*/
|
|
int vmw_dumb_map_offset(struct drm_file *file_priv,
|
|
struct drm_device *dev, uint32_t handle,
|
|
uint64_t *offset)
|
|
{
|
|
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
|
|
struct vmw_buffer_object *out_buf;
|
|
int ret;
|
|
|
|
ret = vmw_user_bo_lookup(tfile, handle, &out_buf, NULL);
|
|
if (ret != 0)
|
|
return -EINVAL;
|
|
|
|
*offset = drm_vma_node_offset_addr(&out_buf->base.base.vma_node);
|
|
vmw_bo_unreference(&out_buf);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_dumb_destroy - Destroy a dumb boffer
|
|
*
|
|
* @file_priv: Pointer to a struct drm_file identifying the caller.
|
|
* @dev: Pointer to the drm device.
|
|
* @handle: Handle identifying the dumb buffer.
|
|
* Return: Zero on success, negative error code on failure.
|
|
*
|
|
* This is a driver callback for the core drm dumb_destroy functionality.
|
|
*/
|
|
int vmw_dumb_destroy(struct drm_file *file_priv,
|
|
struct drm_device *dev,
|
|
uint32_t handle)
|
|
{
|
|
return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
|
|
handle, TTM_REF_USAGE);
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_bo_swap_notify - swapout notify callback.
|
|
*
|
|
* @bo: The buffer object to be swapped out.
|
|
*/
|
|
void vmw_bo_swap_notify(struct ttm_buffer_object *bo)
|
|
{
|
|
/* Is @bo embedded in a struct vmw_buffer_object? */
|
|
if (bo->destroy != vmw_bo_bo_free &&
|
|
bo->destroy != vmw_user_bo_destroy)
|
|
return;
|
|
|
|
/* Kill any cached kernel maps before swapout */
|
|
vmw_bo_unmap(vmw_buffer_object(bo));
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_bo_move_notify - TTM move_notify_callback
|
|
*
|
|
* @bo: The TTM buffer object about to move.
|
|
* @mem: The struct ttm_mem_reg indicating to what memory
|
|
* region the move is taking place.
|
|
*
|
|
* Detaches cached maps and device bindings that require that the
|
|
* buffer doesn't move.
|
|
*/
|
|
void vmw_bo_move_notify(struct ttm_buffer_object *bo,
|
|
struct ttm_mem_reg *mem)
|
|
{
|
|
struct vmw_buffer_object *vbo;
|
|
|
|
if (mem == NULL)
|
|
return;
|
|
|
|
/* Make sure @bo is embedded in a struct vmw_buffer_object? */
|
|
if (bo->destroy != vmw_bo_bo_free &&
|
|
bo->destroy != vmw_user_bo_destroy)
|
|
return;
|
|
|
|
vbo = container_of(bo, struct vmw_buffer_object, base);
|
|
|
|
/*
|
|
* Kill any cached kernel maps before move to or from VRAM.
|
|
* With other types of moves, the underlying pages stay the same,
|
|
* and the map can be kept.
|
|
*/
|
|
if (mem->mem_type == TTM_PL_VRAM || bo->mem.mem_type == TTM_PL_VRAM)
|
|
vmw_bo_unmap(vbo);
|
|
|
|
/*
|
|
* If we're moving a backup MOB out of MOB placement, then make sure we
|
|
* read back all resource content first, and unbind the MOB from
|
|
* the resource.
|
|
*/
|
|
if (mem->mem_type != VMW_PL_MOB && bo->mem.mem_type == VMW_PL_MOB)
|
|
vmw_resource_unbind_list(vbo);
|
|
}
|