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 int vbox_ttm_mem_global_init(struct drm_global_reference *ref)
40 return ttm_mem_global_init(ref->object);
43 static void vbox_ttm_mem_global_release(struct drm_global_reference *ref)
45 ttm_mem_global_release(ref->object);
48 /* Add the vbox memory manager object/structures to the global memory manager */
49 static int vbox_ttm_global_init(struct vbox_private *vbox)
51 struct drm_global_reference *global_ref;
54 global_ref = &vbox->ttm.mem_global_ref;
55 global_ref->global_type = DRM_GLOBAL_TTM_MEM;
56 global_ref->size = sizeof(struct ttm_mem_global);
57 global_ref->init = &vbox_ttm_mem_global_init;
58 global_ref->release = &vbox_ttm_mem_global_release;
59 ret = drm_global_item_ref(global_ref);
61 DRM_ERROR("Failed setting up TTM memory subsystem.\n");
65 vbox->ttm.bo_global_ref.mem_glob = vbox->ttm.mem_global_ref.object;
66 global_ref = &vbox->ttm.bo_global_ref.ref;
67 global_ref->global_type = DRM_GLOBAL_TTM_BO;
68 global_ref->size = sizeof(struct ttm_bo_global);
69 global_ref->init = &ttm_bo_global_init;
70 global_ref->release = &ttm_bo_global_release;
72 ret = drm_global_item_ref(global_ref);
74 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
75 drm_global_item_unref(&vbox->ttm.mem_global_ref);
82 /* Remove the vbox memory manager object from the global memory manager */
83 static void vbox_ttm_global_release(struct vbox_private *vbox)
85 drm_global_item_unref(&vbox->ttm.bo_global_ref.ref);
86 drm_global_item_unref(&vbox->ttm.mem_global_ref);
89 static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo)
93 bo = container_of(tbo, struct vbox_bo, bo);
95 drm_gem_object_release(&bo->gem);
99 static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo)
101 if (bo->destroy == &vbox_bo_ttm_destroy)
108 vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
109 struct ttm_mem_type_manager *man)
113 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
114 man->available_caching = TTM_PL_MASK_CACHING;
115 man->default_caching = TTM_PL_FLAG_CACHED;
118 man->func = &ttm_bo_manager_func;
119 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
120 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
121 man->default_caching = TTM_PL_FLAG_WC;
124 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
132 vbox_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
134 struct vbox_bo *vboxbo = vbox_bo(bo);
136 if (!vbox_ttm_bo_is_vbox_bo(bo))
139 vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM);
140 *pl = vboxbo->placement;
143 static int vbox_bo_verify_access(struct ttm_buffer_object *bo,
149 static int vbox_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
150 struct ttm_mem_reg *mem)
152 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
153 struct vbox_private *vbox = vbox_bdev(bdev);
155 mem->bus.addr = NULL;
157 mem->bus.size = mem->num_pages << PAGE_SHIFT;
159 mem->bus.is_iomem = false;
160 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
162 switch (mem->mem_type) {
167 mem->bus.offset = mem->start << PAGE_SHIFT;
168 mem->bus.base = pci_resource_start(vbox->ddev.pdev, 0);
169 mem->bus.is_iomem = true;
177 static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev,
178 struct ttm_mem_reg *mem)
182 static void vbox_ttm_backend_destroy(struct ttm_tt *tt)
188 static struct ttm_backend_func vbox_tt_backend_func = {
189 .destroy = &vbox_ttm_backend_destroy,
192 static struct ttm_tt *vbox_ttm_tt_create(struct ttm_buffer_object *bo,
197 tt = kzalloc(sizeof(*tt), GFP_KERNEL);
201 tt->func = &vbox_tt_backend_func;
202 if (ttm_tt_init(tt, bo, page_flags)) {
210 static struct ttm_bo_driver vbox_bo_driver = {
211 .ttm_tt_create = vbox_ttm_tt_create,
212 .init_mem_type = vbox_bo_init_mem_type,
213 .eviction_valuable = ttm_bo_eviction_valuable,
214 .evict_flags = vbox_bo_evict_flags,
215 .verify_access = vbox_bo_verify_access,
216 .io_mem_reserve = &vbox_ttm_io_mem_reserve,
217 .io_mem_free = &vbox_ttm_io_mem_free,
220 int vbox_mm_init(struct vbox_private *vbox)
223 struct drm_device *dev = &vbox->ddev;
224 struct ttm_bo_device *bdev = &vbox->ttm.bdev;
226 ret = vbox_ttm_global_init(vbox);
230 ret = ttm_bo_device_init(&vbox->ttm.bdev,
231 vbox->ttm.bo_global_ref.ref.object,
233 dev->anon_inode->i_mapping,
234 DRM_FILE_PAGE_OFFSET, true);
236 DRM_ERROR("Error initialising bo driver; %d\n", ret);
237 goto err_ttm_global_release;
240 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
241 vbox->available_vram_size >> PAGE_SHIFT);
243 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
244 goto err_device_release;
248 vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
249 pci_resource_len(dev->pdev, 0),
252 vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
253 pci_resource_len(dev->pdev, 0));
258 ttm_bo_device_release(&vbox->ttm.bdev);
259 err_ttm_global_release:
260 vbox_ttm_global_release(vbox);
264 void vbox_mm_fini(struct vbox_private *vbox)
267 drm_mtrr_del(vbox->fb_mtrr,
268 pci_resource_start(vbox->ddev.pdev, 0),
269 pci_resource_len(vbox->ddev.pdev, 0), DRM_MTRR_WC);
271 arch_phys_wc_del(vbox->fb_mtrr);
273 ttm_bo_device_release(&vbox->ttm.bdev);
274 vbox_ttm_global_release(vbox);
277 void vbox_ttm_placement(struct vbox_bo *bo, int domain)
282 bo->placement.placement = bo->placements;
283 bo->placement.busy_placement = bo->placements;
285 if (domain & TTM_PL_FLAG_VRAM)
286 bo->placements[c++].flags =
287 TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
288 if (domain & TTM_PL_FLAG_SYSTEM)
289 bo->placements[c++].flags =
290 TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
292 bo->placements[c++].flags =
293 TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
295 bo->placement.num_placement = c;
296 bo->placement.num_busy_placement = c;
298 for (i = 0; i < c; ++i) {
299 bo->placements[i].fpfn = 0;
300 bo->placements[i].lpfn = 0;
304 int vbox_bo_create(struct vbox_private *vbox, int size, int align,
305 u32 flags, struct vbox_bo **pvboxbo)
307 struct vbox_bo *vboxbo;
311 vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL);
315 ret = drm_gem_object_init(&vbox->ddev, &vboxbo->gem, size);
317 goto err_free_vboxbo;
319 vboxbo->bo.bdev = &vbox->ttm.bdev;
321 vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
323 acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size,
324 sizeof(struct vbox_bo));
326 ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
327 ttm_bo_type_device, &vboxbo->placement,
328 align >> PAGE_SHIFT, false, acc_size,
329 NULL, NULL, vbox_bo_ttm_destroy);
331 goto err_free_vboxbo;
342 int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag)
344 struct ttm_operation_ctx ctx = { false, false };
352 ret = vbox_bo_reserve(bo, false);
356 vbox_ttm_placement(bo, pl_flag);
358 for (i = 0; i < bo->placement.num_placement; i++)
359 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
361 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
365 vbox_bo_unreserve(bo);
370 int vbox_bo_unpin(struct vbox_bo *bo)
372 struct ttm_operation_ctx ctx = { false, false };
375 if (!bo->pin_count) {
376 DRM_ERROR("unpin bad %p\n", bo);
383 ret = vbox_bo_reserve(bo, false);
385 DRM_ERROR("Error %d reserving bo, leaving it pinned\n", ret);
389 for (i = 0; i < bo->placement.num_placement; i++)
390 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
392 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
394 vbox_bo_unreserve(bo);
400 * Move a vbox-owned buffer object to system memory if no one else has it
401 * pinned. The caller must have pinned it previously, and this call will
402 * release the caller's pin.
404 int vbox_bo_push_sysram(struct vbox_bo *bo)
406 struct ttm_operation_ctx ctx = { false, false };
409 if (!bo->pin_count) {
410 DRM_ERROR("unpin bad %p\n", bo);
417 if (bo->kmap.virtual) {
418 ttm_bo_kunmap(&bo->kmap);
419 bo->kmap.virtual = NULL;
422 vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
424 for (i = 0; i < bo->placement.num_placement; i++)
425 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
427 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
429 DRM_ERROR("pushing to VRAM failed\n");
436 int vbox_mmap(struct file *filp, struct vm_area_struct *vma)
438 struct drm_file *file_priv;
439 struct vbox_private *vbox;
441 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
444 file_priv = filp->private_data;
445 vbox = file_priv->minor->dev->dev_private;
447 return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev);
450 void *vbox_bo_kmap(struct vbox_bo *bo)
454 if (bo->kmap.virtual)
455 return bo->kmap.virtual;
457 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
459 DRM_ERROR("Error kmapping bo: %d\n", ret);
463 return bo->kmap.virtual;
466 void vbox_bo_kunmap(struct vbox_bo *bo)
468 if (bo->kmap.virtual) {
469 ttm_bo_kunmap(&bo->kmap);
470 bo->kmap.virtual = NULL;