![Christian König](/assets/img/avatar_default.png)
Make sure that the global BO state is always correctly initialized. This allows removing all the device code to initialize it. v2: fix up vbox (Alex) Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
414 lines
9.5 KiB
C
414 lines
9.5 KiB
C
/*
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* Copyright (C) 2013-2017 Oracle Corporation
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* This file is based on ast_ttm.c
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* Copyright 2012 Red Hat Inc.
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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 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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* 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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*
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* Authors: Dave Airlie <airlied@redhat.com>
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* Michael Thayer <michael.thayer@oracle.com>
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*/
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#include "vbox_drv.h"
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#include <ttm/ttm_page_alloc.h>
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static inline struct vbox_private *vbox_bdev(struct ttm_bo_device *bd)
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{
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return container_of(bd, struct vbox_private, ttm.bdev);
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}
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static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo)
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{
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struct vbox_bo *bo;
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bo = container_of(tbo, struct vbox_bo, bo);
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drm_gem_object_release(&bo->gem);
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kfree(bo);
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}
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static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo)
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{
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if (bo->destroy == &vbox_bo_ttm_destroy)
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return true;
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return false;
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}
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static int
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vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
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struct ttm_mem_type_manager *man)
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{
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switch (type) {
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case TTM_PL_SYSTEM:
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man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
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man->available_caching = TTM_PL_MASK_CACHING;
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man->default_caching = TTM_PL_FLAG_CACHED;
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break;
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case TTM_PL_VRAM:
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man->func = &ttm_bo_manager_func;
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man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
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man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
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man->default_caching = TTM_PL_FLAG_WC;
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break;
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default:
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DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
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return -EINVAL;
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}
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return 0;
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}
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static void
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vbox_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
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{
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struct vbox_bo *vboxbo = vbox_bo(bo);
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if (!vbox_ttm_bo_is_vbox_bo(bo))
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return;
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vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM);
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*pl = vboxbo->placement;
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}
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static int vbox_bo_verify_access(struct ttm_buffer_object *bo,
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struct file *filp)
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{
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return 0;
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}
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static int vbox_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
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struct ttm_mem_reg *mem)
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{
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struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
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struct vbox_private *vbox = vbox_bdev(bdev);
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mem->bus.addr = NULL;
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mem->bus.offset = 0;
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mem->bus.size = mem->num_pages << PAGE_SHIFT;
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mem->bus.base = 0;
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mem->bus.is_iomem = false;
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if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
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return -EINVAL;
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switch (mem->mem_type) {
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case TTM_PL_SYSTEM:
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/* system memory */
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return 0;
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case TTM_PL_VRAM:
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mem->bus.offset = mem->start << PAGE_SHIFT;
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mem->bus.base = pci_resource_start(vbox->ddev.pdev, 0);
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mem->bus.is_iomem = true;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev,
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struct ttm_mem_reg *mem)
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{
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}
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static void vbox_ttm_backend_destroy(struct ttm_tt *tt)
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{
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ttm_tt_fini(tt);
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kfree(tt);
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}
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static struct ttm_backend_func vbox_tt_backend_func = {
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.destroy = &vbox_ttm_backend_destroy,
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};
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static struct ttm_tt *vbox_ttm_tt_create(struct ttm_buffer_object *bo,
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u32 page_flags)
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{
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struct ttm_tt *tt;
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tt = kzalloc(sizeof(*tt), GFP_KERNEL);
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if (!tt)
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return NULL;
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tt->func = &vbox_tt_backend_func;
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if (ttm_tt_init(tt, bo, page_flags)) {
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kfree(tt);
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return NULL;
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}
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return tt;
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}
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static struct ttm_bo_driver vbox_bo_driver = {
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.ttm_tt_create = vbox_ttm_tt_create,
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.init_mem_type = vbox_bo_init_mem_type,
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.eviction_valuable = ttm_bo_eviction_valuable,
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.evict_flags = vbox_bo_evict_flags,
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.verify_access = vbox_bo_verify_access,
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.io_mem_reserve = &vbox_ttm_io_mem_reserve,
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.io_mem_free = &vbox_ttm_io_mem_free,
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};
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int vbox_mm_init(struct vbox_private *vbox)
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{
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int ret;
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struct drm_device *dev = &vbox->ddev;
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struct ttm_bo_device *bdev = &vbox->ttm.bdev;
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ret = ttm_bo_device_init(&vbox->ttm.bdev,
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&vbox_bo_driver,
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dev->anon_inode->i_mapping,
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DRM_FILE_PAGE_OFFSET, true);
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if (ret) {
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DRM_ERROR("Error initialising bo driver; %d\n", ret);
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return ret;
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}
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ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
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vbox->available_vram_size >> PAGE_SHIFT);
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if (ret) {
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DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
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goto err_device_release;
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}
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#ifdef DRM_MTRR_WC
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vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
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pci_resource_len(dev->pdev, 0),
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DRM_MTRR_WC);
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#else
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vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
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pci_resource_len(dev->pdev, 0));
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#endif
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return 0;
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err_device_release:
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ttm_bo_device_release(&vbox->ttm.bdev);
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return ret;
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}
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void vbox_mm_fini(struct vbox_private *vbox)
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{
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#ifdef DRM_MTRR_WC
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drm_mtrr_del(vbox->fb_mtrr,
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pci_resource_start(vbox->ddev.pdev, 0),
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pci_resource_len(vbox->ddev.pdev, 0), DRM_MTRR_WC);
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#else
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arch_phys_wc_del(vbox->fb_mtrr);
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#endif
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ttm_bo_device_release(&vbox->ttm.bdev);
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}
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void vbox_ttm_placement(struct vbox_bo *bo, int domain)
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{
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unsigned int i;
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u32 c = 0;
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bo->placement.placement = bo->placements;
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bo->placement.busy_placement = bo->placements;
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if (domain & TTM_PL_FLAG_VRAM)
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bo->placements[c++].flags =
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TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
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if (domain & TTM_PL_FLAG_SYSTEM)
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bo->placements[c++].flags =
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TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
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if (!c)
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bo->placements[c++].flags =
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TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
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bo->placement.num_placement = c;
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bo->placement.num_busy_placement = c;
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for (i = 0; i < c; ++i) {
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bo->placements[i].fpfn = 0;
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bo->placements[i].lpfn = 0;
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}
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}
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int vbox_bo_create(struct vbox_private *vbox, int size, int align,
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u32 flags, struct vbox_bo **pvboxbo)
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{
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struct vbox_bo *vboxbo;
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size_t acc_size;
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int ret;
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vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL);
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if (!vboxbo)
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return -ENOMEM;
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ret = drm_gem_object_init(&vbox->ddev, &vboxbo->gem, size);
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if (ret)
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goto err_free_vboxbo;
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vboxbo->bo.bdev = &vbox->ttm.bdev;
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vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
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acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size,
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sizeof(struct vbox_bo));
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ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
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ttm_bo_type_device, &vboxbo->placement,
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align >> PAGE_SHIFT, false, acc_size,
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NULL, NULL, vbox_bo_ttm_destroy);
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if (ret)
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goto err_free_vboxbo;
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*pvboxbo = vboxbo;
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return 0;
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err_free_vboxbo:
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kfree(vboxbo);
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return ret;
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}
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int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag)
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{
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struct ttm_operation_ctx ctx = { false, false };
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int i, ret;
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if (bo->pin_count) {
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bo->pin_count++;
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return 0;
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}
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ret = vbox_bo_reserve(bo, false);
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if (ret)
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return ret;
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vbox_ttm_placement(bo, pl_flag);
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for (i = 0; i < bo->placement.num_placement; i++)
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bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
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ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
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if (ret == 0)
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bo->pin_count = 1;
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vbox_bo_unreserve(bo);
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return ret;
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}
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int vbox_bo_unpin(struct vbox_bo *bo)
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{
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struct ttm_operation_ctx ctx = { false, false };
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int i, ret;
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if (!bo->pin_count) {
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DRM_ERROR("unpin bad %p\n", bo);
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return 0;
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}
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bo->pin_count--;
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if (bo->pin_count)
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return 0;
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ret = vbox_bo_reserve(bo, false);
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if (ret) {
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DRM_ERROR("Error %d reserving bo, leaving it pinned\n", ret);
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return ret;
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}
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for (i = 0; i < bo->placement.num_placement; i++)
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bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
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ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
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vbox_bo_unreserve(bo);
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return ret;
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}
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/*
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* Move a vbox-owned buffer object to system memory if no one else has it
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* pinned. The caller must have pinned it previously, and this call will
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* release the caller's pin.
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*/
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int vbox_bo_push_sysram(struct vbox_bo *bo)
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{
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struct ttm_operation_ctx ctx = { false, false };
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int i, ret;
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if (!bo->pin_count) {
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DRM_ERROR("unpin bad %p\n", bo);
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return 0;
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}
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bo->pin_count--;
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if (bo->pin_count)
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return 0;
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if (bo->kmap.virtual) {
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ttm_bo_kunmap(&bo->kmap);
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bo->kmap.virtual = NULL;
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}
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vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
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for (i = 0; i < bo->placement.num_placement; i++)
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bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
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ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
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if (ret) {
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DRM_ERROR("pushing to VRAM failed\n");
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return ret;
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}
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return 0;
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}
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int vbox_mmap(struct file *filp, struct vm_area_struct *vma)
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{
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struct drm_file *file_priv;
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struct vbox_private *vbox;
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if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
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return -EINVAL;
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file_priv = filp->private_data;
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vbox = file_priv->minor->dev->dev_private;
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return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev);
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}
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void *vbox_bo_kmap(struct vbox_bo *bo)
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{
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int ret;
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if (bo->kmap.virtual)
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return bo->kmap.virtual;
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ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
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if (ret) {
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DRM_ERROR("Error kmapping bo: %d\n", ret);
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return NULL;
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}
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return bo->kmap.virtual;
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}
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void vbox_bo_kunmap(struct vbox_bo *bo)
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{
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if (bo->kmap.virtual) {
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ttm_bo_kunmap(&bo->kmap);
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bo->kmap.virtual = NULL;
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}
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}
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