mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0b988ca1c7
This moves the generic tracking into the drivers and protects against reentrancy in the drivers. It fixes up radeon and agp to be able to query the bound status as that is required. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200917043040.146575-2-airlied@gmail.com
147 lines
4.0 KiB
C
147 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/**************************************************************************
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*
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* Copyright (c) 2006-2009 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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/*
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* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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* Keith Packard.
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*/
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#define pr_fmt(fmt) "[TTM] " fmt
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#include <drm/ttm/ttm_module.h>
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#include <drm/ttm/ttm_bo_driver.h>
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#include <drm/ttm/ttm_page_alloc.h>
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#include <drm/ttm/ttm_placement.h>
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#include <linux/agp_backend.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <asm/agp.h>
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struct ttm_agp_backend {
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struct ttm_tt ttm;
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struct agp_memory *mem;
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struct agp_bridge_data *bridge;
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};
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int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_resource *bo_mem)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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struct page *dummy_read_page = ttm_bo_glob.dummy_read_page;
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struct drm_mm_node *node = bo_mem->mm_node;
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struct agp_memory *mem;
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int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
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unsigned i;
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if (agp_be->mem)
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return 0;
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mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
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if (unlikely(mem == NULL))
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return -ENOMEM;
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mem->page_count = 0;
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for (i = 0; i < ttm->num_pages; i++) {
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struct page *page = ttm->pages[i];
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if (!page)
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page = dummy_read_page;
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mem->pages[mem->page_count++] = page;
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}
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agp_be->mem = mem;
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mem->is_flushed = 1;
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mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
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ret = agp_bind_memory(mem, node->start);
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if (ret)
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pr_err("AGP Bind memory failed\n");
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return ret;
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}
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EXPORT_SYMBOL(ttm_agp_bind);
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void ttm_agp_unbind(struct ttm_tt *ttm)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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if (agp_be->mem) {
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if (agp_be->mem->is_bound) {
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agp_unbind_memory(agp_be->mem);
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return;
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}
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agp_free_memory(agp_be->mem);
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agp_be->mem = NULL;
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}
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}
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EXPORT_SYMBOL(ttm_agp_unbind);
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bool ttm_agp_is_bound(struct ttm_tt *ttm)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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if (!ttm)
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return false;
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return (agp_be->mem != NULL);
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}
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EXPORT_SYMBOL(ttm_agp_is_bound);
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void ttm_agp_destroy(struct ttm_tt *ttm)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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if (agp_be->mem)
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ttm_agp_unbind(ttm);
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ttm_tt_fini(ttm);
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kfree(agp_be);
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}
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EXPORT_SYMBOL(ttm_agp_destroy);
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struct ttm_tt *ttm_agp_tt_create(struct ttm_buffer_object *bo,
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struct agp_bridge_data *bridge,
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uint32_t page_flags)
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{
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struct ttm_agp_backend *agp_be;
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agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL);
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if (!agp_be)
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return NULL;
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agp_be->mem = NULL;
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agp_be->bridge = bridge;
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if (ttm_tt_init(&agp_be->ttm, bo, page_flags)) {
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kfree(agp_be);
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return NULL;
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}
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return &agp_be->ttm;
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}
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EXPORT_SYMBOL(ttm_agp_tt_create);
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