1 // SPDX-License-Identifier: MIT
3 * Copyright (C) 2013-2017 Oracle Corporation
4 * This file is based on ast_ttm.c
5 * Copyright 2012 Red Hat Inc.
6 * Authors: Dave Airlie <airlied@redhat.com>
7 * Michael Thayer <michael.thayer@oracle.com>
10 #include <drm/drm_file.h>
11 #include <drm/ttm/ttm_page_alloc.h>
14 static inline struct vbox_private *vbox_bdev(struct ttm_bo_device *bd)
16 return container_of(bd, struct vbox_private, ttm.bdev);
19 static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo)
23 bo = container_of(tbo, struct vbox_bo, bo);
25 drm_gem_object_release(&bo->gem);
29 static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo)
31 if (bo->destroy == &vbox_bo_ttm_destroy)
38 vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
39 struct ttm_mem_type_manager *man)
43 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
44 man->available_caching = TTM_PL_MASK_CACHING;
45 man->default_caching = TTM_PL_FLAG_CACHED;
48 man->func = &ttm_bo_manager_func;
49 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
50 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
51 man->default_caching = TTM_PL_FLAG_WC;
54 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
62 vbox_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
64 struct vbox_bo *vboxbo = vbox_bo(bo);
66 if (!vbox_ttm_bo_is_vbox_bo(bo))
69 vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM);
70 *pl = vboxbo->placement;
73 static int vbox_bo_verify_access(struct ttm_buffer_object *bo,
79 static int vbox_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
80 struct ttm_mem_reg *mem)
82 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
83 struct vbox_private *vbox = vbox_bdev(bdev);
87 mem->bus.size = mem->num_pages << PAGE_SHIFT;
89 mem->bus.is_iomem = false;
90 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
92 switch (mem->mem_type) {
97 mem->bus.offset = mem->start << PAGE_SHIFT;
98 mem->bus.base = pci_resource_start(vbox->ddev.pdev, 0);
99 mem->bus.is_iomem = true;
107 static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev,
108 struct ttm_mem_reg *mem)
112 static void vbox_ttm_backend_destroy(struct ttm_tt *tt)
118 static struct ttm_backend_func vbox_tt_backend_func = {
119 .destroy = &vbox_ttm_backend_destroy,
122 static struct ttm_tt *vbox_ttm_tt_create(struct ttm_buffer_object *bo,
127 tt = kzalloc(sizeof(*tt), GFP_KERNEL);
131 tt->func = &vbox_tt_backend_func;
132 if (ttm_tt_init(tt, bo, page_flags)) {
140 static struct ttm_bo_driver vbox_bo_driver = {
141 .ttm_tt_create = vbox_ttm_tt_create,
142 .init_mem_type = vbox_bo_init_mem_type,
143 .eviction_valuable = ttm_bo_eviction_valuable,
144 .evict_flags = vbox_bo_evict_flags,
145 .verify_access = vbox_bo_verify_access,
146 .io_mem_reserve = &vbox_ttm_io_mem_reserve,
147 .io_mem_free = &vbox_ttm_io_mem_free,
150 int vbox_mm_init(struct vbox_private *vbox)
153 struct drm_device *dev = &vbox->ddev;
154 struct ttm_bo_device *bdev = &vbox->ttm.bdev;
156 ret = ttm_bo_device_init(&vbox->ttm.bdev,
158 dev->anon_inode->i_mapping,
159 DRM_FILE_PAGE_OFFSET, true);
161 DRM_ERROR("Error initialising bo driver; %d\n", ret);
165 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
166 vbox->available_vram_size >> PAGE_SHIFT);
168 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
169 goto err_device_release;
173 vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
174 pci_resource_len(dev->pdev, 0),
177 vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
178 pci_resource_len(dev->pdev, 0));
183 ttm_bo_device_release(&vbox->ttm.bdev);
187 void vbox_mm_fini(struct vbox_private *vbox)
190 drm_mtrr_del(vbox->fb_mtrr,
191 pci_resource_start(vbox->ddev.pdev, 0),
192 pci_resource_len(vbox->ddev.pdev, 0), DRM_MTRR_WC);
194 arch_phys_wc_del(vbox->fb_mtrr);
196 ttm_bo_device_release(&vbox->ttm.bdev);
199 void vbox_ttm_placement(struct vbox_bo *bo, int domain)
204 bo->placement.placement = bo->placements;
205 bo->placement.busy_placement = bo->placements;
207 if (domain & TTM_PL_FLAG_VRAM)
208 bo->placements[c++].flags =
209 TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
210 if (domain & TTM_PL_FLAG_SYSTEM)
211 bo->placements[c++].flags =
212 TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
214 bo->placements[c++].flags =
215 TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
217 bo->placement.num_placement = c;
218 bo->placement.num_busy_placement = c;
220 for (i = 0; i < c; ++i) {
221 bo->placements[i].fpfn = 0;
222 bo->placements[i].lpfn = 0;
226 int vbox_bo_create(struct vbox_private *vbox, int size, int align,
227 u32 flags, struct vbox_bo **pvboxbo)
229 struct vbox_bo *vboxbo;
233 vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL);
237 ret = drm_gem_object_init(&vbox->ddev, &vboxbo->gem, size);
239 goto err_free_vboxbo;
241 vboxbo->bo.bdev = &vbox->ttm.bdev;
243 vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
245 acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size,
246 sizeof(struct vbox_bo));
248 ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
249 ttm_bo_type_device, &vboxbo->placement,
250 align >> PAGE_SHIFT, false, acc_size,
251 NULL, NULL, vbox_bo_ttm_destroy);
253 goto err_free_vboxbo;
264 int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag)
266 struct ttm_operation_ctx ctx = { false, false };
274 ret = vbox_bo_reserve(bo, false);
278 vbox_ttm_placement(bo, pl_flag);
280 for (i = 0; i < bo->placement.num_placement; i++)
281 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
283 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
287 vbox_bo_unreserve(bo);
292 int vbox_bo_unpin(struct vbox_bo *bo)
294 struct ttm_operation_ctx ctx = { false, false };
297 if (!bo->pin_count) {
298 DRM_ERROR("unpin bad %p\n", bo);
305 ret = vbox_bo_reserve(bo, false);
307 DRM_ERROR("Error %d reserving bo, leaving it pinned\n", ret);
311 for (i = 0; i < bo->placement.num_placement; i++)
312 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
314 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
316 vbox_bo_unreserve(bo);
322 * Move a vbox-owned buffer object to system memory if no one else has it
323 * pinned. The caller must have pinned it previously, and this call will
324 * release the caller's pin.
326 int vbox_bo_push_sysram(struct vbox_bo *bo)
328 struct ttm_operation_ctx ctx = { false, false };
331 if (!bo->pin_count) {
332 DRM_ERROR("unpin bad %p\n", bo);
339 if (bo->kmap.virtual) {
340 ttm_bo_kunmap(&bo->kmap);
341 bo->kmap.virtual = NULL;
344 vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
346 for (i = 0; i < bo->placement.num_placement; i++)
347 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
349 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
351 DRM_ERROR("pushing to VRAM failed\n");
358 int vbox_mmap(struct file *filp, struct vm_area_struct *vma)
360 struct drm_file *file_priv;
361 struct vbox_private *vbox;
363 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
366 file_priv = filp->private_data;
367 vbox = file_priv->minor->dev->dev_private;
369 return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev);
372 void *vbox_bo_kmap(struct vbox_bo *bo)
376 if (bo->kmap.virtual)
377 return bo->kmap.virtual;
379 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
381 DRM_ERROR("Error kmapping bo: %d\n", ret);
385 return bo->kmap.virtual;
388 void vbox_bo_kunmap(struct vbox_bo *bo)
390 if (bo->kmap.virtual) {
391 ttm_bo_kunmap(&bo->kmap);
392 bo->kmap.virtual = NULL;