1dc5698e8SDave Airlie /* 2dc5698e8SDave Airlie * Copyright (C) 2015 Red Hat, Inc. 3dc5698e8SDave Airlie * All Rights Reserved. 4dc5698e8SDave Airlie * 5dc5698e8SDave Airlie * Permission is hereby granted, free of charge, to any person obtaining 6dc5698e8SDave Airlie * a copy of this software and associated documentation files (the 7dc5698e8SDave Airlie * "Software"), to deal in the Software without restriction, including 8dc5698e8SDave Airlie * without limitation the rights to use, copy, modify, merge, publish, 9dc5698e8SDave Airlie * distribute, sublicense, and/or sell copies of the Software, and to 10dc5698e8SDave Airlie * permit persons to whom the Software is furnished to do so, subject to 11dc5698e8SDave Airlie * the following conditions: 12dc5698e8SDave Airlie * 13dc5698e8SDave Airlie * The above copyright notice and this permission notice (including the 14dc5698e8SDave Airlie * next paragraph) shall be included in all copies or substantial 15dc5698e8SDave Airlie * portions of the Software. 16dc5698e8SDave Airlie * 17dc5698e8SDave Airlie * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18dc5698e8SDave Airlie * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19dc5698e8SDave Airlie * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 20dc5698e8SDave Airlie * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 21dc5698e8SDave Airlie * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 22dc5698e8SDave Airlie * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 23dc5698e8SDave Airlie * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24dc5698e8SDave Airlie */ 25dc5698e8SDave Airlie 262fe4ca9dSGerd Hoffmann #include <linux/dma-mapping.h> 27b0138364SStephen Rothwell #include <linux/moduleparam.h> 28b0138364SStephen Rothwell 29dc5698e8SDave Airlie #include "virtgpu_drv.h" 30dc5698e8SDave Airlie 313e93bc2aSGerd Hoffmann static int virtio_gpu_virglrenderer_workaround = 1; 323e93bc2aSGerd Hoffmann module_param_named(virglhack, virtio_gpu_virglrenderer_workaround, int, 0400); 333e93bc2aSGerd Hoffmann 34556c62e8SMatthew Wilcox static int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, 356c1cd97bSGerd Hoffmann uint32_t *resid) 366c1cd97bSGerd Hoffmann { 373e93bc2aSGerd Hoffmann if (virtio_gpu_virglrenderer_workaround) { 383e93bc2aSGerd Hoffmann /* 393e93bc2aSGerd Hoffmann * Hack to avoid re-using resource IDs. 403e93bc2aSGerd Hoffmann * 413e93bc2aSGerd Hoffmann * virglrenderer versions up to (and including) 0.7.0 423e93bc2aSGerd Hoffmann * can't deal with that. virglrenderer commit 433e93bc2aSGerd Hoffmann * "f91a9dd35715 Fix unlinking resources from hash 443e93bc2aSGerd Hoffmann * table." (Feb 2019) fixes the bug. 453e93bc2aSGerd Hoffmann */ 46fbb30168SJohn Bates static atomic_t seqno = ATOMIC_INIT(0); 47fbb30168SJohn Bates int handle = atomic_inc_return(&seqno); 483e93bc2aSGerd Hoffmann *resid = handle + 1; 493e93bc2aSGerd Hoffmann } else { 502ae7f165SMatthew Wilcox int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL); 51556c62e8SMatthew Wilcox if (handle < 0) 52556c62e8SMatthew Wilcox return handle; 532ae7f165SMatthew Wilcox *resid = handle + 1; 543e93bc2aSGerd Hoffmann } 55556c62e8SMatthew Wilcox return 0; 566c1cd97bSGerd Hoffmann } 576c1cd97bSGerd Hoffmann 586c1cd97bSGerd Hoffmann static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id) 596c1cd97bSGerd Hoffmann { 603e93bc2aSGerd Hoffmann if (!virtio_gpu_virglrenderer_workaround) { 612ae7f165SMatthew Wilcox ida_free(&vgdev->resource_ida, id - 1); 623e93bc2aSGerd Hoffmann } 636c1cd97bSGerd Hoffmann } 646c1cd97bSGerd Hoffmann 651ed5f698SGerd Hoffmann void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo) 661ed5f698SGerd Hoffmann { 671ed5f698SGerd Hoffmann struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; 681ed5f698SGerd Hoffmann 69bc1a4130SGurchetan Singh virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); 70bc1a4130SGurchetan Singh if (virtio_gpu_is_shmem(bo)) { 71f651c8b0SGurchetan Singh struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo); 721ed5f698SGerd Hoffmann 73f651c8b0SGurchetan Singh if (shmem->pages) { 74f651c8b0SGurchetan Singh if (shmem->mapped) { 752fe4ca9dSGerd Hoffmann dma_unmap_sg(vgdev->vdev->dev.parent, 76f651c8b0SGurchetan Singh shmem->pages->sgl, shmem->mapped, 772fe4ca9dSGerd Hoffmann DMA_TO_DEVICE); 78f651c8b0SGurchetan Singh shmem->mapped = 0; 792fe4ca9dSGerd Hoffmann } 80bc1a4130SGurchetan Singh 81f651c8b0SGurchetan Singh sg_free_table(shmem->pages); 82836b194dSXin He kfree(shmem->pages); 83f651c8b0SGurchetan Singh shmem->pages = NULL; 842fe4ca9dSGerd Hoffmann drm_gem_shmem_unpin(&bo->base.base); 852fe4ca9dSGerd Hoffmann } 86bc1a4130SGurchetan Singh 871ed5f698SGerd Hoffmann drm_gem_shmem_free_object(&bo->base.base); 881ed5f698SGerd Hoffmann } 89bc1a4130SGurchetan Singh } 901ed5f698SGerd Hoffmann 91c66df701SGerd Hoffmann static void virtio_gpu_free_object(struct drm_gem_object *obj) 92dc5698e8SDave Airlie { 93c66df701SGerd Hoffmann struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj); 94c66df701SGerd Hoffmann struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; 95dc5698e8SDave Airlie 961ed5f698SGerd Hoffmann if (bo->created) { 971ed5f698SGerd Hoffmann virtio_gpu_cmd_unref_resource(vgdev, bo); 9897452907SGerd Hoffmann virtio_gpu_notify(vgdev); 991ed5f698SGerd Hoffmann /* completion handler calls virtio_gpu_cleanup_object() */ 1001ed5f698SGerd Hoffmann return; 1011ed5f698SGerd Hoffmann } 1021ed5f698SGerd Hoffmann virtio_gpu_cleanup_object(bo); 103dc5698e8SDave Airlie } 104dc5698e8SDave Airlie 10518b39fb9SGurchetan Singh static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = { 106c66df701SGerd Hoffmann .free = virtio_gpu_free_object, 107c66df701SGerd Hoffmann .open = virtio_gpu_gem_object_open, 108c66df701SGerd Hoffmann .close = virtio_gpu_gem_object_close, 109c66df701SGerd Hoffmann 110c66df701SGerd Hoffmann .print_info = drm_gem_shmem_print_info, 111c66df701SGerd Hoffmann .pin = drm_gem_shmem_pin, 112c66df701SGerd Hoffmann .unpin = drm_gem_shmem_unpin, 113c66df701SGerd Hoffmann .get_sg_table = drm_gem_shmem_get_sg_table, 114c66df701SGerd Hoffmann .vmap = drm_gem_shmem_vmap, 115c66df701SGerd Hoffmann .vunmap = drm_gem_shmem_vunmap, 116068a8feaSGurchetan Singh .mmap = drm_gem_shmem_mmap, 117c66df701SGerd Hoffmann }; 118c66df701SGerd Hoffmann 119bc1a4130SGurchetan Singh bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo) 12018b39fb9SGurchetan Singh { 121bc1a4130SGurchetan Singh return bo->base.base.funcs == &virtio_gpu_shmem_funcs; 12218b39fb9SGurchetan Singh } 12318b39fb9SGurchetan Singh 124c66df701SGerd Hoffmann struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev, 125c66df701SGerd Hoffmann size_t size) 126dc5698e8SDave Airlie { 1270666a8d7SJiri Slaby struct virtio_gpu_object_shmem *shmem; 1280666a8d7SJiri Slaby struct drm_gem_shmem_object *dshmem; 129dc5698e8SDave Airlie 1300666a8d7SJiri Slaby shmem = kzalloc(sizeof(*shmem), GFP_KERNEL); 1310666a8d7SJiri Slaby if (!shmem) 132c66df701SGerd Hoffmann return NULL; 133dc5698e8SDave Airlie 1340666a8d7SJiri Slaby dshmem = &shmem->base.base; 1350666a8d7SJiri Slaby dshmem->base.funcs = &virtio_gpu_shmem_funcs; 1360666a8d7SJiri Slaby dshmem->map_cached = true; 1370666a8d7SJiri Slaby return &dshmem->base; 138dc5698e8SDave Airlie } 139dc5698e8SDave Airlie 1402f2aa137SGerd Hoffmann static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev, 1412f2aa137SGerd Hoffmann struct virtio_gpu_object *bo, 1422f2aa137SGerd Hoffmann struct virtio_gpu_mem_entry **ents, 1432f2aa137SGerd Hoffmann unsigned int *nents) 1442f2aa137SGerd Hoffmann { 1452f2aa137SGerd Hoffmann bool use_dma_api = !virtio_has_iommu_quirk(vgdev->vdev); 146f651c8b0SGurchetan Singh struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo); 1472f2aa137SGerd Hoffmann struct scatterlist *sg; 1482f2aa137SGerd Hoffmann int si, ret; 1492f2aa137SGerd Hoffmann 1502f2aa137SGerd Hoffmann ret = drm_gem_shmem_pin(&bo->base.base); 1512f2aa137SGerd Hoffmann if (ret < 0) 1522f2aa137SGerd Hoffmann return -EINVAL; 1532f2aa137SGerd Hoffmann 154f651c8b0SGurchetan Singh shmem->pages = drm_gem_shmem_get_sg_table(&bo->base.base); 155f651c8b0SGurchetan Singh if (!shmem->pages) { 1562f2aa137SGerd Hoffmann drm_gem_shmem_unpin(&bo->base.base); 1572f2aa137SGerd Hoffmann return -EINVAL; 1582f2aa137SGerd Hoffmann } 1592f2aa137SGerd Hoffmann 1602f2aa137SGerd Hoffmann if (use_dma_api) { 161f651c8b0SGurchetan Singh shmem->mapped = dma_map_sg(vgdev->vdev->dev.parent, 162f651c8b0SGurchetan Singh shmem->pages->sgl, 163f651c8b0SGurchetan Singh shmem->pages->nents, 1642f2aa137SGerd Hoffmann DMA_TO_DEVICE); 165f651c8b0SGurchetan Singh *nents = shmem->mapped; 1662f2aa137SGerd Hoffmann } else { 167f651c8b0SGurchetan Singh *nents = shmem->pages->nents; 1682f2aa137SGerd Hoffmann } 1692f2aa137SGerd Hoffmann 1702f2aa137SGerd Hoffmann *ents = kmalloc_array(*nents, sizeof(struct virtio_gpu_mem_entry), 1712f2aa137SGerd Hoffmann GFP_KERNEL); 1722f2aa137SGerd Hoffmann if (!(*ents)) { 1732f2aa137SGerd Hoffmann DRM_ERROR("failed to allocate ent list\n"); 1742f2aa137SGerd Hoffmann return -ENOMEM; 1752f2aa137SGerd Hoffmann } 1762f2aa137SGerd Hoffmann 177f651c8b0SGurchetan Singh for_each_sg(shmem->pages->sgl, sg, *nents, si) { 1782f2aa137SGerd Hoffmann (*ents)[si].addr = cpu_to_le64(use_dma_api 1792f2aa137SGerd Hoffmann ? sg_dma_address(sg) 1802f2aa137SGerd Hoffmann : sg_phys(sg)); 1812f2aa137SGerd Hoffmann (*ents)[si].length = cpu_to_le32(sg->length); 1822f2aa137SGerd Hoffmann (*ents)[si].padding = 0; 1832f2aa137SGerd Hoffmann } 1842f2aa137SGerd Hoffmann return 0; 1852f2aa137SGerd Hoffmann } 1862f2aa137SGerd Hoffmann 187dc5698e8SDave Airlie int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, 1884441235fSGerd Hoffmann struct virtio_gpu_object_params *params, 189530b2842SGerd Hoffmann struct virtio_gpu_object **bo_ptr, 190530b2842SGerd Hoffmann struct virtio_gpu_fence *fence) 191dc5698e8SDave Airlie { 192e2324300SGerd Hoffmann struct virtio_gpu_object_array *objs = NULL; 193c66df701SGerd Hoffmann struct drm_gem_shmem_object *shmem_obj; 194dc5698e8SDave Airlie struct virtio_gpu_object *bo; 1952f2aa137SGerd Hoffmann struct virtio_gpu_mem_entry *ents; 1962f2aa137SGerd Hoffmann unsigned int nents; 197dc5698e8SDave Airlie int ret; 198dc5698e8SDave Airlie 199dc5698e8SDave Airlie *bo_ptr = NULL; 200dc5698e8SDave Airlie 201c66df701SGerd Hoffmann params->size = roundup(params->size, PAGE_SIZE); 202c66df701SGerd Hoffmann shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size); 203c66df701SGerd Hoffmann if (IS_ERR(shmem_obj)) 204c66df701SGerd Hoffmann return PTR_ERR(shmem_obj); 205c66df701SGerd Hoffmann bo = gem_to_virtio_gpu_obj(&shmem_obj->base); 206dc5698e8SDave Airlie 207556c62e8SMatthew Wilcox ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle); 208e2324300SGerd Hoffmann if (ret < 0) 209e2324300SGerd Hoffmann goto err_free_gem; 210e2324300SGerd Hoffmann 211530b2842SGerd Hoffmann bo->dumb = params->dumb; 212dc5698e8SDave Airlie 213e2324300SGerd Hoffmann if (fence) { 214e2324300SGerd Hoffmann ret = -ENOMEM; 215e2324300SGerd Hoffmann objs = virtio_gpu_array_alloc(1); 216e2324300SGerd Hoffmann if (!objs) 217e2324300SGerd Hoffmann goto err_put_id; 218c66df701SGerd Hoffmann virtio_gpu_array_add_obj(objs, &bo->base.base); 219e2324300SGerd Hoffmann 220e2324300SGerd Hoffmann ret = virtio_gpu_array_lock_resv(objs); 221e2324300SGerd Hoffmann if (ret != 0) 222e2324300SGerd Hoffmann goto err_put_objs; 223e2324300SGerd Hoffmann } 224e2324300SGerd Hoffmann 225530b2842SGerd Hoffmann if (params->virgl) { 226e2324300SGerd Hoffmann virtio_gpu_cmd_resource_create_3d(vgdev, bo, params, 227e2324300SGerd Hoffmann objs, fence); 228530b2842SGerd Hoffmann } else { 229e2324300SGerd Hoffmann virtio_gpu_cmd_create_resource(vgdev, bo, params, 230e2324300SGerd Hoffmann objs, fence); 231530b2842SGerd Hoffmann } 232530b2842SGerd Hoffmann 2332f2aa137SGerd Hoffmann ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents); 2342f2aa137SGerd Hoffmann if (ret != 0) { 2352f2aa137SGerd Hoffmann virtio_gpu_free_object(&shmem_obj->base); 2362f2aa137SGerd Hoffmann return ret; 2372f2aa137SGerd Hoffmann } 2382f2aa137SGerd Hoffmann 239c76d4ab7SGurchetan Singh virtio_gpu_object_attach(vgdev, bo, ents, nents); 240dc5698e8SDave Airlie 241dc5698e8SDave Airlie *bo_ptr = bo; 242dc5698e8SDave Airlie return 0; 243e2324300SGerd Hoffmann 244e2324300SGerd Hoffmann err_put_objs: 245e2324300SGerd Hoffmann virtio_gpu_array_put_free(objs); 246e2324300SGerd Hoffmann err_put_id: 247e2324300SGerd Hoffmann virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); 248e2324300SGerd Hoffmann err_free_gem: 249c66df701SGerd Hoffmann drm_gem_shmem_free_object(&shmem_obj->base); 250e2324300SGerd Hoffmann return ret; 251dc5698e8SDave Airlie } 252