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 34f895c707SGurchetan Singh int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, uint32_t *resid) 356c1cd97bSGerd Hoffmann { 363e93bc2aSGerd Hoffmann if (virtio_gpu_virglrenderer_workaround) { 373e93bc2aSGerd Hoffmann /* 383e93bc2aSGerd Hoffmann * Hack to avoid re-using resource IDs. 393e93bc2aSGerd Hoffmann * 403e93bc2aSGerd Hoffmann * virglrenderer versions up to (and including) 0.7.0 413e93bc2aSGerd Hoffmann * can't deal with that. virglrenderer commit 423e93bc2aSGerd Hoffmann * "f91a9dd35715 Fix unlinking resources from hash 433e93bc2aSGerd Hoffmann * table." (Feb 2019) fixes the bug. 443e93bc2aSGerd Hoffmann */ 45fbb30168SJohn Bates static atomic_t seqno = ATOMIC_INIT(0); 46fbb30168SJohn Bates int handle = atomic_inc_return(&seqno); 473e93bc2aSGerd Hoffmann *resid = handle + 1; 483e93bc2aSGerd Hoffmann } else { 492ae7f165SMatthew Wilcox int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL); 50556c62e8SMatthew Wilcox if (handle < 0) 51556c62e8SMatthew Wilcox return handle; 522ae7f165SMatthew Wilcox *resid = handle + 1; 533e93bc2aSGerd Hoffmann } 54556c62e8SMatthew Wilcox return 0; 556c1cd97bSGerd Hoffmann } 566c1cd97bSGerd Hoffmann 576c1cd97bSGerd Hoffmann static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id) 586c1cd97bSGerd Hoffmann { 593e93bc2aSGerd Hoffmann if (!virtio_gpu_virglrenderer_workaround) { 602ae7f165SMatthew Wilcox ida_free(&vgdev->resource_ida, id - 1); 613e93bc2aSGerd Hoffmann } 626c1cd97bSGerd Hoffmann } 636c1cd97bSGerd Hoffmann 641ed5f698SGerd Hoffmann void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo) 651ed5f698SGerd Hoffmann { 661ed5f698SGerd Hoffmann struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; 671ed5f698SGerd Hoffmann 68bc1a4130SGurchetan Singh virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); 69bc1a4130SGurchetan Singh if (virtio_gpu_is_shmem(bo)) { 70f651c8b0SGurchetan Singh struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo); 711ed5f698SGerd Hoffmann 72f651c8b0SGurchetan Singh if (shmem->pages) { 73f651c8b0SGurchetan Singh if (shmem->mapped) { 7475ef337bSMarek Szyprowski dma_unmap_sgtable(vgdev->vdev->dev.parent, 7575ef337bSMarek Szyprowski shmem->pages, DMA_TO_DEVICE, 0); 76f651c8b0SGurchetan Singh shmem->mapped = 0; 772fe4ca9dSGerd Hoffmann } 78bc1a4130SGurchetan Singh 79f651c8b0SGurchetan Singh sg_free_table(shmem->pages); 80836b194dSXin He kfree(shmem->pages); 81f651c8b0SGurchetan Singh shmem->pages = NULL; 822fe4ca9dSGerd Hoffmann drm_gem_shmem_unpin(&bo->base.base); 832fe4ca9dSGerd Hoffmann } 84bc1a4130SGurchetan Singh 851ed5f698SGerd Hoffmann drm_gem_shmem_free_object(&bo->base.base); 8616845c5dSGerd Hoffmann } else if (virtio_gpu_is_vram(bo)) { 8716845c5dSGerd Hoffmann struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo); 8816845c5dSGerd Hoffmann 8916845c5dSGerd Hoffmann spin_lock(&vgdev->host_visible_lock); 9016845c5dSGerd Hoffmann if (drm_mm_node_allocated(&vram->vram_node)) 9116845c5dSGerd Hoffmann drm_mm_remove_node(&vram->vram_node); 9216845c5dSGerd Hoffmann 9316845c5dSGerd Hoffmann spin_unlock(&vgdev->host_visible_lock); 9416845c5dSGerd Hoffmann 9516845c5dSGerd Hoffmann drm_gem_free_mmap_offset(&vram->base.base.base); 9616845c5dSGerd Hoffmann drm_gem_object_release(&vram->base.base.base); 9716845c5dSGerd Hoffmann kfree(vram); 981ed5f698SGerd Hoffmann } 99bc1a4130SGurchetan Singh } 1001ed5f698SGerd Hoffmann 101c66df701SGerd Hoffmann static void virtio_gpu_free_object(struct drm_gem_object *obj) 102dc5698e8SDave Airlie { 103c66df701SGerd Hoffmann struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj); 104c66df701SGerd Hoffmann struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; 105dc5698e8SDave Airlie 1061ed5f698SGerd Hoffmann if (bo->created) { 1071ed5f698SGerd Hoffmann virtio_gpu_cmd_unref_resource(vgdev, bo); 10897452907SGerd Hoffmann virtio_gpu_notify(vgdev); 1091ed5f698SGerd Hoffmann /* completion handler calls virtio_gpu_cleanup_object() */ 1101ed5f698SGerd Hoffmann return; 1111ed5f698SGerd Hoffmann } 1121ed5f698SGerd Hoffmann virtio_gpu_cleanup_object(bo); 113dc5698e8SDave Airlie } 114dc5698e8SDave Airlie 11518b39fb9SGurchetan Singh static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = { 116c66df701SGerd Hoffmann .free = virtio_gpu_free_object, 117c66df701SGerd Hoffmann .open = virtio_gpu_gem_object_open, 118c66df701SGerd Hoffmann .close = virtio_gpu_gem_object_close, 119c66df701SGerd Hoffmann 120c66df701SGerd Hoffmann .print_info = drm_gem_shmem_print_info, 121c6069a02SThomas Zimmermann .export = virtgpu_gem_prime_export, 122c66df701SGerd Hoffmann .pin = drm_gem_shmem_pin, 123c66df701SGerd Hoffmann .unpin = drm_gem_shmem_unpin, 124c66df701SGerd Hoffmann .get_sg_table = drm_gem_shmem_get_sg_table, 125c66df701SGerd Hoffmann .vmap = drm_gem_shmem_vmap, 126c66df701SGerd Hoffmann .vunmap = drm_gem_shmem_vunmap, 127068a8feaSGurchetan Singh .mmap = drm_gem_shmem_mmap, 128c66df701SGerd Hoffmann }; 129c66df701SGerd Hoffmann 130bc1a4130SGurchetan Singh bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo) 13118b39fb9SGurchetan Singh { 132bc1a4130SGurchetan Singh return bo->base.base.funcs == &virtio_gpu_shmem_funcs; 13318b39fb9SGurchetan Singh } 13418b39fb9SGurchetan Singh 135c66df701SGerd Hoffmann struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev, 136c66df701SGerd Hoffmann size_t size) 137dc5698e8SDave Airlie { 1380666a8d7SJiri Slaby struct virtio_gpu_object_shmem *shmem; 1390666a8d7SJiri Slaby struct drm_gem_shmem_object *dshmem; 140dc5698e8SDave Airlie 1410666a8d7SJiri Slaby shmem = kzalloc(sizeof(*shmem), GFP_KERNEL); 1420666a8d7SJiri Slaby if (!shmem) 143c66df701SGerd Hoffmann return NULL; 144dc5698e8SDave Airlie 1450666a8d7SJiri Slaby dshmem = &shmem->base.base; 1460666a8d7SJiri Slaby dshmem->base.funcs = &virtio_gpu_shmem_funcs; 1470666a8d7SJiri Slaby return &dshmem->base; 148dc5698e8SDave Airlie } 149dc5698e8SDave Airlie 1502f2aa137SGerd Hoffmann static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev, 1512f2aa137SGerd Hoffmann struct virtio_gpu_object *bo, 1522f2aa137SGerd Hoffmann struct virtio_gpu_mem_entry **ents, 1532f2aa137SGerd Hoffmann unsigned int *nents) 1542f2aa137SGerd Hoffmann { 15524b6842aSMichael S. Tsirkin bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev); 156f651c8b0SGurchetan Singh struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo); 1572f2aa137SGerd Hoffmann struct scatterlist *sg; 1582f2aa137SGerd Hoffmann int si, ret; 1592f2aa137SGerd Hoffmann 1602f2aa137SGerd Hoffmann ret = drm_gem_shmem_pin(&bo->base.base); 1612f2aa137SGerd Hoffmann if (ret < 0) 1622f2aa137SGerd Hoffmann return -EINVAL; 1632f2aa137SGerd Hoffmann 16451c3b0ccSGurchetan Singh /* 16551c3b0ccSGurchetan Singh * virtio_gpu uses drm_gem_shmem_get_sg_table instead of 16651c3b0ccSGurchetan Singh * drm_gem_shmem_get_pages_sgt because virtio has it's own set of 16751c3b0ccSGurchetan Singh * dma-ops. This is discouraged for other drivers, but should be fine 16851c3b0ccSGurchetan Singh * since virtio_gpu doesn't support dma-buf import from other devices. 16951c3b0ccSGurchetan Singh */ 17051c3b0ccSGurchetan Singh shmem->pages = drm_gem_shmem_get_sg_table(&bo->base.base); 171f651c8b0SGurchetan Singh if (!shmem->pages) { 1722f2aa137SGerd Hoffmann drm_gem_shmem_unpin(&bo->base.base); 1732f2aa137SGerd Hoffmann return -EINVAL; 1742f2aa137SGerd Hoffmann } 1752f2aa137SGerd Hoffmann 1762f2aa137SGerd Hoffmann if (use_dma_api) { 17775ef337bSMarek Szyprowski ret = dma_map_sgtable(vgdev->vdev->dev.parent, 17875ef337bSMarek Szyprowski shmem->pages, DMA_TO_DEVICE, 0); 17975ef337bSMarek Szyprowski if (ret) 18075ef337bSMarek Szyprowski return ret; 18175ef337bSMarek Szyprowski *nents = shmem->mapped = shmem->pages->nents; 1822f2aa137SGerd Hoffmann } else { 18375ef337bSMarek Szyprowski *nents = shmem->pages->orig_nents; 1842f2aa137SGerd Hoffmann } 1852f2aa137SGerd Hoffmann 186ea86f3deSSergey Senozhatsky *ents = kvmalloc_array(*nents, 187ea86f3deSSergey Senozhatsky sizeof(struct virtio_gpu_mem_entry), 1882f2aa137SGerd Hoffmann GFP_KERNEL); 1892f2aa137SGerd Hoffmann if (!(*ents)) { 1902f2aa137SGerd Hoffmann DRM_ERROR("failed to allocate ent list\n"); 1912f2aa137SGerd Hoffmann return -ENOMEM; 1922f2aa137SGerd Hoffmann } 1932f2aa137SGerd Hoffmann 19475ef337bSMarek Szyprowski if (use_dma_api) { 19575ef337bSMarek Szyprowski for_each_sgtable_dma_sg(shmem->pages, sg, si) { 19675ef337bSMarek Szyprowski (*ents)[si].addr = cpu_to_le64(sg_dma_address(sg)); 19775ef337bSMarek Szyprowski (*ents)[si].length = cpu_to_le32(sg_dma_len(sg)); 19875ef337bSMarek Szyprowski (*ents)[si].padding = 0; 19975ef337bSMarek Szyprowski } 20075ef337bSMarek Szyprowski } else { 20175ef337bSMarek Szyprowski for_each_sgtable_sg(shmem->pages, sg, si) { 20275ef337bSMarek Szyprowski (*ents)[si].addr = cpu_to_le64(sg_phys(sg)); 2032f2aa137SGerd Hoffmann (*ents)[si].length = cpu_to_le32(sg->length); 2042f2aa137SGerd Hoffmann (*ents)[si].padding = 0; 2052f2aa137SGerd Hoffmann } 20675ef337bSMarek Szyprowski } 20775ef337bSMarek Szyprowski 2082f2aa137SGerd Hoffmann return 0; 2092f2aa137SGerd Hoffmann } 2102f2aa137SGerd Hoffmann 211dc5698e8SDave Airlie int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, 2124441235fSGerd Hoffmann struct virtio_gpu_object_params *params, 213530b2842SGerd Hoffmann struct virtio_gpu_object **bo_ptr, 214530b2842SGerd Hoffmann struct virtio_gpu_fence *fence) 215dc5698e8SDave Airlie { 216e2324300SGerd Hoffmann struct virtio_gpu_object_array *objs = NULL; 217c66df701SGerd Hoffmann struct drm_gem_shmem_object *shmem_obj; 218dc5698e8SDave Airlie struct virtio_gpu_object *bo; 2192f2aa137SGerd Hoffmann struct virtio_gpu_mem_entry *ents; 2202f2aa137SGerd Hoffmann unsigned int nents; 221dc5698e8SDave Airlie int ret; 222dc5698e8SDave Airlie 223dc5698e8SDave Airlie *bo_ptr = NULL; 224dc5698e8SDave Airlie 225c66df701SGerd Hoffmann params->size = roundup(params->size, PAGE_SIZE); 226c66df701SGerd Hoffmann shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size); 227c66df701SGerd Hoffmann if (IS_ERR(shmem_obj)) 228c66df701SGerd Hoffmann return PTR_ERR(shmem_obj); 229c66df701SGerd Hoffmann bo = gem_to_virtio_gpu_obj(&shmem_obj->base); 230dc5698e8SDave Airlie 231556c62e8SMatthew Wilcox ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle); 232e2324300SGerd Hoffmann if (ret < 0) 233e2324300SGerd Hoffmann goto err_free_gem; 234e2324300SGerd Hoffmann 235530b2842SGerd Hoffmann bo->dumb = params->dumb; 236dc5698e8SDave Airlie 237e2324300SGerd Hoffmann if (fence) { 238e2324300SGerd Hoffmann ret = -ENOMEM; 239e2324300SGerd Hoffmann objs = virtio_gpu_array_alloc(1); 240e2324300SGerd Hoffmann if (!objs) 241e2324300SGerd Hoffmann goto err_put_id; 242c66df701SGerd Hoffmann virtio_gpu_array_add_obj(objs, &bo->base.base); 243e2324300SGerd Hoffmann 244e2324300SGerd Hoffmann ret = virtio_gpu_array_lock_resv(objs); 245e2324300SGerd Hoffmann if (ret != 0) 246e2324300SGerd Hoffmann goto err_put_objs; 247e2324300SGerd Hoffmann } 248e2324300SGerd Hoffmann 2492f2aa137SGerd Hoffmann ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents); 2502f2aa137SGerd Hoffmann if (ret != 0) { 251*377f8331Sxndcn virtio_gpu_array_put_free(objs); 2522f2aa137SGerd Hoffmann virtio_gpu_free_object(&shmem_obj->base); 2532f2aa137SGerd Hoffmann return ret; 2542f2aa137SGerd Hoffmann } 2552f2aa137SGerd Hoffmann 256897b4d1aSGerd Hoffmann if (params->blob) { 257897b4d1aSGerd Hoffmann virtio_gpu_cmd_resource_create_blob(vgdev, bo, params, 258897b4d1aSGerd Hoffmann ents, nents); 259897b4d1aSGerd Hoffmann } else if (params->virgl) { 26030172efbSGurchetan Singh virtio_gpu_cmd_resource_create_3d(vgdev, bo, params, 26130172efbSGurchetan Singh objs, fence); 262c76d4ab7SGurchetan Singh virtio_gpu_object_attach(vgdev, bo, ents, nents); 26330172efbSGurchetan Singh } else { 26430172efbSGurchetan Singh virtio_gpu_cmd_create_resource(vgdev, bo, params, 26530172efbSGurchetan Singh objs, fence); 26630172efbSGurchetan Singh virtio_gpu_object_attach(vgdev, bo, ents, nents); 26730172efbSGurchetan Singh } 268dc5698e8SDave Airlie 269dc5698e8SDave Airlie *bo_ptr = bo; 270dc5698e8SDave Airlie return 0; 271e2324300SGerd Hoffmann 272e2324300SGerd Hoffmann err_put_objs: 273e2324300SGerd Hoffmann virtio_gpu_array_put_free(objs); 274e2324300SGerd Hoffmann err_put_id: 275e2324300SGerd Hoffmann virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); 276e2324300SGerd Hoffmann err_free_gem: 277c66df701SGerd Hoffmann drm_gem_shmem_free_object(&shmem_obj->base); 278e2324300SGerd Hoffmann return ret; 279dc5698e8SDave Airlie } 280