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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/virtio/virtgpu_object.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_object.c')
-rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_object.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c new file mode 100644 index 000000000..c7e74cf13 --- /dev/null +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -0,0 +1,249 @@ +/* + * Copyright (C) 2015 Red Hat, Inc. + * All Rights Reserved. + * + * 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, sublicense, 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 NONINFRINGEMENT. + * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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. + */ + +#include <linux/dma-mapping.h> +#include <linux/moduleparam.h> + +#include "virtgpu_drv.h" + +static int virtio_gpu_virglrenderer_workaround = 1; +module_param_named(virglhack, virtio_gpu_virglrenderer_workaround, int, 0400); + +int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, uint32_t *resid) +{ + if (virtio_gpu_virglrenderer_workaround) { + /* + * Hack to avoid re-using resource IDs. + * + * virglrenderer versions up to (and including) 0.7.0 + * can't deal with that. virglrenderer commit + * "f91a9dd35715 Fix unlinking resources from hash + * table." (Feb 2019) fixes the bug. + */ + static atomic_t seqno = ATOMIC_INIT(0); + int handle = atomic_inc_return(&seqno); + *resid = handle + 1; + } else { + int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL); + if (handle < 0) + return handle; + *resid = handle + 1; + } + return 0; +} + +static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id) +{ + if (!virtio_gpu_virglrenderer_workaround) { + ida_free(&vgdev->resource_ida, id - 1); + } +} + +void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo) +{ + struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; + + virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); + if (virtio_gpu_is_shmem(bo)) { + drm_gem_shmem_free(&bo->base); + } else if (virtio_gpu_is_vram(bo)) { + struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo); + + spin_lock(&vgdev->host_visible_lock); + if (drm_mm_node_allocated(&vram->vram_node)) + drm_mm_remove_node(&vram->vram_node); + + spin_unlock(&vgdev->host_visible_lock); + + drm_gem_free_mmap_offset(&vram->base.base.base); + drm_gem_object_release(&vram->base.base.base); + kfree(vram); + } +} + +static void virtio_gpu_free_object(struct drm_gem_object *obj) +{ + struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj); + struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; + + if (bo->created) { + virtio_gpu_cmd_unref_resource(vgdev, bo); + virtio_gpu_notify(vgdev); + /* completion handler calls virtio_gpu_cleanup_object() */ + return; + } + virtio_gpu_cleanup_object(bo); +} + +static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = { + .free = virtio_gpu_free_object, + .open = virtio_gpu_gem_object_open, + .close = virtio_gpu_gem_object_close, + .print_info = drm_gem_shmem_object_print_info, + .export = virtgpu_gem_prime_export, + .pin = drm_gem_shmem_object_pin, + .unpin = drm_gem_shmem_object_unpin, + .get_sg_table = drm_gem_shmem_object_get_sg_table, + .vmap = drm_gem_shmem_object_vmap, + .vunmap = drm_gem_shmem_object_vunmap, + .mmap = drm_gem_shmem_object_mmap, + .vm_ops = &drm_gem_shmem_vm_ops, +}; + +bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo) +{ + return bo->base.base.funcs == &virtio_gpu_shmem_funcs; +} + +struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev, + size_t size) +{ + struct virtio_gpu_object_shmem *shmem; + struct drm_gem_shmem_object *dshmem; + + shmem = kzalloc(sizeof(*shmem), GFP_KERNEL); + if (!shmem) + return ERR_PTR(-ENOMEM); + + dshmem = &shmem->base.base; + dshmem->base.funcs = &virtio_gpu_shmem_funcs; + return &dshmem->base; +} + +static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object *bo, + struct virtio_gpu_mem_entry **ents, + unsigned int *nents) +{ + bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev); + struct scatterlist *sg; + struct sg_table *pages; + int si; + + pages = drm_gem_shmem_get_pages_sgt(&bo->base); + if (IS_ERR(pages)) + return PTR_ERR(pages); + + if (use_dma_api) + *nents = pages->nents; + else + *nents = pages->orig_nents; + + *ents = kvmalloc_array(*nents, + sizeof(struct virtio_gpu_mem_entry), + GFP_KERNEL); + if (!(*ents)) { + DRM_ERROR("failed to allocate ent list\n"); + return -ENOMEM; + } + + if (use_dma_api) { + for_each_sgtable_dma_sg(pages, sg, si) { + (*ents)[si].addr = cpu_to_le64(sg_dma_address(sg)); + (*ents)[si].length = cpu_to_le32(sg_dma_len(sg)); + (*ents)[si].padding = 0; + } + } else { + for_each_sgtable_sg(pages, sg, si) { + (*ents)[si].addr = cpu_to_le64(sg_phys(sg)); + (*ents)[si].length = cpu_to_le32(sg->length); + (*ents)[si].padding = 0; + } + } + + return 0; +} + +int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object_params *params, + struct virtio_gpu_object **bo_ptr, + struct virtio_gpu_fence *fence) +{ + struct virtio_gpu_object_array *objs = NULL; + struct drm_gem_shmem_object *shmem_obj; + struct virtio_gpu_object *bo; + struct virtio_gpu_mem_entry *ents = NULL; + unsigned int nents; + int ret; + + *bo_ptr = NULL; + + params->size = roundup(params->size, PAGE_SIZE); + shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size); + if (IS_ERR(shmem_obj)) + return PTR_ERR(shmem_obj); + bo = gem_to_virtio_gpu_obj(&shmem_obj->base); + + ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle); + if (ret < 0) + goto err_free_gem; + + bo->dumb = params->dumb; + + ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents); + if (ret != 0) + goto err_put_id; + + if (fence) { + ret = -ENOMEM; + objs = virtio_gpu_array_alloc(1); + if (!objs) + goto err_free_entry; + virtio_gpu_array_add_obj(objs, &bo->base.base); + + ret = virtio_gpu_array_lock_resv(objs); + if (ret != 0) + goto err_put_objs; + } + + if (params->blob) { + if (params->blob_mem == VIRTGPU_BLOB_MEM_GUEST) + bo->guest_blob = true; + + virtio_gpu_cmd_resource_create_blob(vgdev, bo, params, + ents, nents); + } else if (params->virgl) { + virtio_gpu_cmd_resource_create_3d(vgdev, bo, params, + objs, fence); + virtio_gpu_object_attach(vgdev, bo, ents, nents); + } else { + virtio_gpu_cmd_create_resource(vgdev, bo, params, + objs, fence); + virtio_gpu_object_attach(vgdev, bo, ents, nents); + } + + *bo_ptr = bo; + return 0; + +err_put_objs: + virtio_gpu_array_put_free(objs); +err_free_entry: + kvfree(ents); +err_put_id: + virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); +err_free_gem: + drm_gem_shmem_free(shmem_obj); + return ret; +} |