![Christian König](/assets/img/avatar_default.png)
Instead of calculating the size in bytes just to recalculate the number of pages from it pass the BO directly to the function. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Roger He <Hongbo.He@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
455 lines
12 KiB
C
455 lines
12 KiB
C
/*
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* Copyright (C) 2015 Red Hat, Inc.
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* All Rights Reserved.
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*
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* Authors:
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* Dave Airlie
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* Alon Levy
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions 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 NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <drm/ttm/ttm_bo_api.h>
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#include <drm/ttm/ttm_bo_driver.h>
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#include <drm/ttm/ttm_placement.h>
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#include <drm/ttm/ttm_page_alloc.h>
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#include <drm/ttm/ttm_module.h>
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#include <drm/drmP.h>
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#include <drm/drm.h>
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#include <drm/virtgpu_drm.h>
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#include "virtgpu_drv.h"
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#include <linux/delay.h>
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#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
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static struct
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virtio_gpu_device *virtio_gpu_get_vgdev(struct ttm_bo_device *bdev)
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{
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struct virtio_gpu_mman *mman;
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struct virtio_gpu_device *vgdev;
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mman = container_of(bdev, struct virtio_gpu_mman, bdev);
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vgdev = container_of(mman, struct virtio_gpu_device, mman);
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return vgdev;
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}
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static int virtio_gpu_ttm_mem_global_init(struct drm_global_reference *ref)
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{
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return ttm_mem_global_init(ref->object);
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}
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static void virtio_gpu_ttm_mem_global_release(struct drm_global_reference *ref)
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{
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ttm_mem_global_release(ref->object);
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}
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static int virtio_gpu_ttm_global_init(struct virtio_gpu_device *vgdev)
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{
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struct drm_global_reference *global_ref;
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int r;
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vgdev->mman.mem_global_referenced = false;
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global_ref = &vgdev->mman.mem_global_ref;
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global_ref->global_type = DRM_GLOBAL_TTM_MEM;
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global_ref->size = sizeof(struct ttm_mem_global);
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global_ref->init = &virtio_gpu_ttm_mem_global_init;
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global_ref->release = &virtio_gpu_ttm_mem_global_release;
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r = drm_global_item_ref(global_ref);
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if (r != 0) {
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DRM_ERROR("Failed setting up TTM memory accounting "
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"subsystem.\n");
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return r;
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}
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vgdev->mman.bo_global_ref.mem_glob =
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vgdev->mman.mem_global_ref.object;
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global_ref = &vgdev->mman.bo_global_ref.ref;
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global_ref->global_type = DRM_GLOBAL_TTM_BO;
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global_ref->size = sizeof(struct ttm_bo_global);
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global_ref->init = &ttm_bo_global_init;
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global_ref->release = &ttm_bo_global_release;
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r = drm_global_item_ref(global_ref);
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if (r != 0) {
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DRM_ERROR("Failed setting up TTM BO subsystem.\n");
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drm_global_item_unref(&vgdev->mman.mem_global_ref);
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return r;
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}
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vgdev->mman.mem_global_referenced = true;
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return 0;
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}
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static void virtio_gpu_ttm_global_fini(struct virtio_gpu_device *vgdev)
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{
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if (vgdev->mman.mem_global_referenced) {
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drm_global_item_unref(&vgdev->mman.bo_global_ref.ref);
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drm_global_item_unref(&vgdev->mman.mem_global_ref);
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vgdev->mman.mem_global_referenced = false;
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}
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}
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#if 0
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/*
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* Hmm, seems to not do anything useful. Leftover debug hack?
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* Something like printing pagefaults to kernel log?
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*/
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static struct vm_operations_struct virtio_gpu_ttm_vm_ops;
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static const struct vm_operations_struct *ttm_vm_ops;
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static int virtio_gpu_ttm_fault(struct vm_fault *vmf)
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{
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struct ttm_buffer_object *bo;
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struct virtio_gpu_device *vgdev;
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int r;
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bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
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if (bo == NULL)
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return VM_FAULT_NOPAGE;
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vgdev = virtio_gpu_get_vgdev(bo->bdev);
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r = ttm_vm_ops->fault(vmf);
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return r;
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}
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#endif
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int virtio_gpu_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 virtio_gpu_device *vgdev;
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int r;
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file_priv = filp->private_data;
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vgdev = file_priv->minor->dev->dev_private;
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if (vgdev == NULL) {
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DRM_ERROR(
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"filp->private_data->minor->dev->dev_private == NULL\n");
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return -EINVAL;
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}
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r = ttm_bo_mmap(filp, vma, &vgdev->mman.bdev);
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#if 0
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if (unlikely(r != 0))
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return r;
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if (unlikely(ttm_vm_ops == NULL)) {
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ttm_vm_ops = vma->vm_ops;
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virtio_gpu_ttm_vm_ops = *ttm_vm_ops;
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virtio_gpu_ttm_vm_ops.fault = &virtio_gpu_ttm_fault;
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}
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vma->vm_ops = &virtio_gpu_ttm_vm_ops;
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return 0;
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#else
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return r;
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#endif
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}
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static int virtio_gpu_invalidate_caches(struct ttm_bo_device *bdev,
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uint32_t flags)
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{
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return 0;
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}
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static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
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struct ttm_buffer_object *bo,
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const struct ttm_place *place,
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struct ttm_mem_reg *mem)
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{
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mem->mm_node = (void *)1;
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return 0;
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}
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static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
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struct ttm_mem_reg *mem)
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{
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mem->mm_node = (void *)NULL;
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}
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static int ttm_bo_man_init(struct ttm_mem_type_manager *man,
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unsigned long p_size)
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{
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return 0;
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}
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static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man)
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{
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return 0;
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}
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static void ttm_bo_man_debug(struct ttm_mem_type_manager *man,
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struct drm_printer *printer)
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{
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}
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static const struct ttm_mem_type_manager_func virtio_gpu_bo_manager_func = {
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.init = ttm_bo_man_init,
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.takedown = ttm_bo_man_takedown,
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.get_node = ttm_bo_man_get_node,
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.put_node = ttm_bo_man_put_node,
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.debug = ttm_bo_man_debug
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};
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static int virtio_gpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
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struct ttm_mem_type_manager *man)
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{
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struct virtio_gpu_device *vgdev;
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vgdev = virtio_gpu_get_vgdev(bdev);
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switch (type) {
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case TTM_PL_SYSTEM:
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/* System memory */
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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_TT:
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man->func = &virtio_gpu_bo_manager_func;
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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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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 virtio_gpu_evict_flags(struct ttm_buffer_object *bo,
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struct ttm_placement *placement)
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{
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static const struct ttm_place placements = {
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.fpfn = 0,
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.lpfn = 0,
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.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM,
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};
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placement->placement = &placements;
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placement->busy_placement = &placements;
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placement->num_placement = 1;
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placement->num_busy_placement = 1;
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}
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static int virtio_gpu_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 virtio_gpu_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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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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case TTM_PL_TT:
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/* system memory */
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return 0;
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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 virtio_gpu_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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/*
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* TTM backend functions.
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*/
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struct virtio_gpu_ttm_tt {
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struct ttm_dma_tt ttm;
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struct virtio_gpu_device *vgdev;
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u64 offset;
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};
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static int virtio_gpu_ttm_backend_bind(struct ttm_tt *ttm,
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struct ttm_mem_reg *bo_mem)
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{
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struct virtio_gpu_ttm_tt *gtt = (void *)ttm;
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gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
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if (!ttm->num_pages)
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WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
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ttm->num_pages, bo_mem, ttm);
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/* Not implemented */
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return 0;
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}
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static int virtio_gpu_ttm_backend_unbind(struct ttm_tt *ttm)
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{
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/* Not implemented */
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return 0;
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}
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static void virtio_gpu_ttm_backend_destroy(struct ttm_tt *ttm)
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{
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struct virtio_gpu_ttm_tt *gtt = (void *)ttm;
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ttm_dma_tt_fini(>t->ttm);
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kfree(gtt);
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}
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static struct ttm_backend_func virtio_gpu_backend_func = {
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.bind = &virtio_gpu_ttm_backend_bind,
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.unbind = &virtio_gpu_ttm_backend_unbind,
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.destroy = &virtio_gpu_ttm_backend_destroy,
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};
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static struct ttm_tt *virtio_gpu_ttm_tt_create(struct ttm_buffer_object *bo,
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uint32_t page_flags)
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{
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struct virtio_gpu_device *vgdev;
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struct virtio_gpu_ttm_tt *gtt;
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vgdev = virtio_gpu_get_vgdev(bo->bdev);
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gtt = kzalloc(sizeof(struct virtio_gpu_ttm_tt), GFP_KERNEL);
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if (gtt == NULL)
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return NULL;
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gtt->ttm.ttm.func = &virtio_gpu_backend_func;
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gtt->vgdev = vgdev;
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if (ttm_dma_tt_init(>t->ttm, bo, page_flags)) {
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kfree(gtt);
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return NULL;
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}
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return >t->ttm.ttm;
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}
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static void virtio_gpu_move_null(struct ttm_buffer_object *bo,
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struct ttm_mem_reg *new_mem)
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{
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struct ttm_mem_reg *old_mem = &bo->mem;
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BUG_ON(old_mem->mm_node != NULL);
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*old_mem = *new_mem;
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new_mem->mm_node = NULL;
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}
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static int virtio_gpu_bo_move(struct ttm_buffer_object *bo, bool evict,
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struct ttm_operation_ctx *ctx,
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struct ttm_mem_reg *new_mem)
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{
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int ret;
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ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
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if (ret)
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return ret;
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virtio_gpu_move_null(bo, new_mem);
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return 0;
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}
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static void virtio_gpu_bo_move_notify(struct ttm_buffer_object *tbo,
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bool evict,
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struct ttm_mem_reg *new_mem)
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{
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struct virtio_gpu_object *bo;
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struct virtio_gpu_device *vgdev;
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bo = container_of(tbo, struct virtio_gpu_object, tbo);
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vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private;
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if (!new_mem || (new_mem->placement & TTM_PL_FLAG_SYSTEM)) {
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if (bo->hw_res_handle)
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virtio_gpu_cmd_resource_inval_backing(vgdev,
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bo->hw_res_handle);
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} else if (new_mem->placement & TTM_PL_FLAG_TT) {
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if (bo->hw_res_handle) {
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virtio_gpu_object_attach(vgdev, bo, bo->hw_res_handle,
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NULL);
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}
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}
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}
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static void virtio_gpu_bo_swap_notify(struct ttm_buffer_object *tbo)
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{
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struct virtio_gpu_object *bo;
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struct virtio_gpu_device *vgdev;
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bo = container_of(tbo, struct virtio_gpu_object, tbo);
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vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private;
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if (bo->pages)
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virtio_gpu_object_free_sg_table(bo);
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}
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static struct ttm_bo_driver virtio_gpu_bo_driver = {
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.ttm_tt_create = &virtio_gpu_ttm_tt_create,
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.invalidate_caches = &virtio_gpu_invalidate_caches,
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.init_mem_type = &virtio_gpu_init_mem_type,
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.eviction_valuable = ttm_bo_eviction_valuable,
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.evict_flags = &virtio_gpu_evict_flags,
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.move = &virtio_gpu_bo_move,
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.verify_access = &virtio_gpu_verify_access,
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.io_mem_reserve = &virtio_gpu_ttm_io_mem_reserve,
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.io_mem_free = &virtio_gpu_ttm_io_mem_free,
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.move_notify = &virtio_gpu_bo_move_notify,
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.swap_notify = &virtio_gpu_bo_swap_notify,
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};
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int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev)
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{
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int r;
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r = virtio_gpu_ttm_global_init(vgdev);
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if (r)
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return r;
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/* No others user of address space so set it to 0 */
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r = ttm_bo_device_init(&vgdev->mman.bdev,
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vgdev->mman.bo_global_ref.ref.object,
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&virtio_gpu_bo_driver,
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vgdev->ddev->anon_inode->i_mapping,
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DRM_FILE_PAGE_OFFSET, 0);
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if (r) {
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DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
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goto err_dev_init;
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}
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r = ttm_bo_init_mm(&vgdev->mman.bdev, TTM_PL_TT, 0);
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if (r) {
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DRM_ERROR("Failed initializing GTT heap.\n");
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goto err_mm_init;
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}
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return 0;
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err_mm_init:
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ttm_bo_device_release(&vgdev->mman.bdev);
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err_dev_init:
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virtio_gpu_ttm_global_fini(vgdev);
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return r;
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}
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void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev)
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{
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ttm_bo_device_release(&vgdev->mman.bdev);
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virtio_gpu_ttm_global_fini(vgdev);
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DRM_INFO("virtio_gpu: ttm finalized\n");
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}
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