2 * Copyright (C) 2013-2017 Oracle Corporation
3 * This file is based on ast_ttm.c
4 * Copyright 2012 Red Hat Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
27 * Authors: Dave Airlie <airlied@redhat.com>
28 * Michael Thayer <michael.thayer@oracle.com>
31 #include <ttm/ttm_page_alloc.h>
33 static inline struct vbox_private *vbox_bdev(struct ttm_bo_device *bd)
35 return container_of(bd, struct vbox_private, ttm.bdev);
38 static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo)
42 bo = container_of(tbo, struct vbox_bo, bo);
44 drm_gem_object_release(&bo->gem);
48 static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo)
50 if (bo->destroy == &vbox_bo_ttm_destroy)
57 vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
58 struct ttm_mem_type_manager *man)
62 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
63 man->available_caching = TTM_PL_MASK_CACHING;
64 man->default_caching = TTM_PL_FLAG_CACHED;
67 man->func = &ttm_bo_manager_func;
68 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
69 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
70 man->default_caching = TTM_PL_FLAG_WC;
73 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
81 vbox_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
83 struct vbox_bo *vboxbo = vbox_bo(bo);
85 if (!vbox_ttm_bo_is_vbox_bo(bo))
88 vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM);
89 *pl = vboxbo->placement;
92 static int vbox_bo_verify_access(struct ttm_buffer_object *bo,
98 static int vbox_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
99 struct ttm_mem_reg *mem)
101 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
102 struct vbox_private *vbox = vbox_bdev(bdev);
104 mem->bus.addr = NULL;
106 mem->bus.size = mem->num_pages << PAGE_SHIFT;
108 mem->bus.is_iomem = false;
109 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
111 switch (mem->mem_type) {
116 mem->bus.offset = mem->start << PAGE_SHIFT;
117 mem->bus.base = pci_resource_start(vbox->ddev.pdev, 0);
118 mem->bus.is_iomem = true;
126 static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev,
127 struct ttm_mem_reg *mem)
131 static void vbox_ttm_backend_destroy(struct ttm_tt *tt)
137 static struct ttm_backend_func vbox_tt_backend_func = {
138 .destroy = &vbox_ttm_backend_destroy,
141 static struct ttm_tt *vbox_ttm_tt_create(struct ttm_buffer_object *bo,
146 tt = kzalloc(sizeof(*tt), GFP_KERNEL);
150 tt->func = &vbox_tt_backend_func;
151 if (ttm_tt_init(tt, bo, page_flags)) {
159 static struct ttm_bo_driver vbox_bo_driver = {
160 .ttm_tt_create = vbox_ttm_tt_create,
161 .init_mem_type = vbox_bo_init_mem_type,
162 .eviction_valuable = ttm_bo_eviction_valuable,
163 .evict_flags = vbox_bo_evict_flags,
164 .verify_access = vbox_bo_verify_access,
165 .io_mem_reserve = &vbox_ttm_io_mem_reserve,
166 .io_mem_free = &vbox_ttm_io_mem_free,
169 int vbox_mm_init(struct vbox_private *vbox)
172 struct drm_device *dev = &vbox->ddev;
173 struct ttm_bo_device *bdev = &vbox->ttm.bdev;
175 ret = ttm_bo_device_init(&vbox->ttm.bdev,
177 dev->anon_inode->i_mapping,
178 DRM_FILE_PAGE_OFFSET, true);
180 DRM_ERROR("Error initialising bo driver; %d\n", ret);
184 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
185 vbox->available_vram_size >> PAGE_SHIFT);
187 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
188 goto err_device_release;
192 vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
193 pci_resource_len(dev->pdev, 0),
196 vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
197 pci_resource_len(dev->pdev, 0));
202 ttm_bo_device_release(&vbox->ttm.bdev);
206 void vbox_mm_fini(struct vbox_private *vbox)
209 drm_mtrr_del(vbox->fb_mtrr,
210 pci_resource_start(vbox->ddev.pdev, 0),
211 pci_resource_len(vbox->ddev.pdev, 0), DRM_MTRR_WC);
213 arch_phys_wc_del(vbox->fb_mtrr);
215 ttm_bo_device_release(&vbox->ttm.bdev);
218 void vbox_ttm_placement(struct vbox_bo *bo, int domain)
223 bo->placement.placement = bo->placements;
224 bo->placement.busy_placement = bo->placements;
226 if (domain & TTM_PL_FLAG_VRAM)
227 bo->placements[c++].flags =
228 TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
229 if (domain & TTM_PL_FLAG_SYSTEM)
230 bo->placements[c++].flags =
231 TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
233 bo->placements[c++].flags =
234 TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
236 bo->placement.num_placement = c;
237 bo->placement.num_busy_placement = c;
239 for (i = 0; i < c; ++i) {
240 bo->placements[i].fpfn = 0;
241 bo->placements[i].lpfn = 0;
245 int vbox_bo_create(struct vbox_private *vbox, int size, int align,
246 u32 flags, struct vbox_bo **pvboxbo)
248 struct vbox_bo *vboxbo;
252 vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL);
256 ret = drm_gem_object_init(&vbox->ddev, &vboxbo->gem, size);
258 goto err_free_vboxbo;
260 vboxbo->bo.bdev = &vbox->ttm.bdev;
262 vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
264 acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size,
265 sizeof(struct vbox_bo));
267 ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
268 ttm_bo_type_device, &vboxbo->placement,
269 align >> PAGE_SHIFT, false, acc_size,
270 NULL, NULL, vbox_bo_ttm_destroy);
272 goto err_free_vboxbo;
283 int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag)
285 struct ttm_operation_ctx ctx = { false, false };
293 ret = vbox_bo_reserve(bo, false);
297 vbox_ttm_placement(bo, pl_flag);
299 for (i = 0; i < bo->placement.num_placement; i++)
300 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
302 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
306 vbox_bo_unreserve(bo);
311 int vbox_bo_unpin(struct vbox_bo *bo)
313 struct ttm_operation_ctx ctx = { false, false };
316 if (!bo->pin_count) {
317 DRM_ERROR("unpin bad %p\n", bo);
324 ret = vbox_bo_reserve(bo, false);
326 DRM_ERROR("Error %d reserving bo, leaving it pinned\n", ret);
330 for (i = 0; i < bo->placement.num_placement; i++)
331 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
333 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
335 vbox_bo_unreserve(bo);
341 * Move a vbox-owned buffer object to system memory if no one else has it
342 * pinned. The caller must have pinned it previously, and this call will
343 * release the caller's pin.
345 int vbox_bo_push_sysram(struct vbox_bo *bo)
347 struct ttm_operation_ctx ctx = { false, false };
350 if (!bo->pin_count) {
351 DRM_ERROR("unpin bad %p\n", bo);
358 if (bo->kmap.virtual) {
359 ttm_bo_kunmap(&bo->kmap);
360 bo->kmap.virtual = NULL;
363 vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
365 for (i = 0; i < bo->placement.num_placement; i++)
366 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
368 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
370 DRM_ERROR("pushing to VRAM failed\n");
377 int vbox_mmap(struct file *filp, struct vm_area_struct *vma)
379 struct drm_file *file_priv;
380 struct vbox_private *vbox;
382 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
385 file_priv = filp->private_data;
386 vbox = file_priv->minor->dev->dev_private;
388 return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev);
391 void *vbox_bo_kmap(struct vbox_bo *bo)
395 if (bo->kmap.virtual)
396 return bo->kmap.virtual;
398 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
400 DRM_ERROR("Error kmapping bo: %d\n", ret);
404 return bo->kmap.virtual;
407 void vbox_bo_kunmap(struct vbox_bo *bo)
409 if (bo->kmap.virtual) {
410 ttm_bo_kunmap(&bo->kmap);
411 bo->kmap.virtual = NULL;