// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
*
* Copyright 2015 VMware, Inc., Palo Alto, CA., USA
*
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
/*
* This file implements the vmwgfx context binding manager,
* The sole reason for having to use this code is that vmware guest
* backed contexts can be swapped out to their backing mobs by the device
* at any time, also swapped in at any time. At swapin time, the device
* validates the context bindings to make sure they point to valid resources.
* It's this outside-of-drawcall validation (that can happen at any time),
* that makes this code necessary.
*
* We therefore need to kill any context bindings pointing to a resource
* when the resource is swapped out. Furthermore, if the vmwgfx driver has
* swapped out the context we can't swap it in again to kill bindings because
* of backing mob reservation lockdep violations, so as part of
* context swapout, also kill all bindings of a context, so that they are
* already killed if a resource to which a binding points
* needs to be swapped out.
*
* Note that a resource can be pointed to by bindings from multiple contexts,
* Therefore we can't easily protect this data by a per context mutex
* (unless we use deadlock-safe WW mutexes). So we use a global binding_mutex
* to protect all binding manager data.
*
* Finally, any association between a context and a global resource
* (surface, shader or even DX query) is conceptually a context binding that
* needs to be tracked by this code.
*/
#include "vmwgfx_drv.h"
#include "vmwgfx_binding.h"
#include "device_include/svga3d_reg.h"
#define VMW_BINDING_RT_BIT 0
#define VMW_BINDING_PS_BIT 1
#define VMW_BINDING_SO_T_BIT 2
#define VMW_BINDING_VB_BIT 3
#define VMW_BINDING_UAV_BIT 4
#define VMW_BINDING_CS_UAV_BIT 5
#define VMW_BINDING_NUM_BITS 6
#define VMW_BINDING_PS_SR_BIT 0
/**
* struct vmw_ctx_binding_state - per context binding state
*
* @dev_priv: Pointer to device private structure.
* @list: linked list of individual active bindings.
* @render_targets: Render target bindings.
* @texture_u
