1a8c21a54SThe etnaviv authors /* 2a8c21a54SThe etnaviv authors * Copyright (C) 2015 Etnaviv Project 3a8c21a54SThe etnaviv authors * 4a8c21a54SThe etnaviv authors * This program is free software; you can redistribute it and/or modify it 5a8c21a54SThe etnaviv authors * under the terms of the GNU General Public License version 2 as published by 6a8c21a54SThe etnaviv authors * the Free Software Foundation. 7a8c21a54SThe etnaviv authors * 8a8c21a54SThe etnaviv authors * This program is distributed in the hope that it will be useful, but WITHOUT 9a8c21a54SThe etnaviv authors * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10a8c21a54SThe etnaviv authors * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11a8c21a54SThe etnaviv authors * more details. 12a8c21a54SThe etnaviv authors * 13a8c21a54SThe etnaviv authors * You should have received a copy of the GNU General Public License along with 14a8c21a54SThe etnaviv authors * this program. If not, see <http://www.gnu.org/licenses/>. 15a8c21a54SThe etnaviv authors */ 16a8c21a54SThe etnaviv authors 17a8c21a54SThe etnaviv authors #include <linux/spinlock.h> 18a8c21a54SThe etnaviv authors #include <linux/shmem_fs.h> 196e84f315SIngo Molnar #include <linux/sched/mm.h> 200881e7bdSIngo Molnar #include <linux/sched/task.h> 21a8c21a54SThe etnaviv authors 22a8c21a54SThe etnaviv authors #include "etnaviv_drv.h" 23a8c21a54SThe etnaviv authors #include "etnaviv_gem.h" 24a8c21a54SThe etnaviv authors #include "etnaviv_gpu.h" 25a8c21a54SThe etnaviv authors #include "etnaviv_mmu.h" 26a8c21a54SThe etnaviv authors 27a8c21a54SThe etnaviv authors static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj) 28a8c21a54SThe etnaviv authors { 29a8c21a54SThe etnaviv authors struct drm_device *dev = etnaviv_obj->base.dev; 30a8c21a54SThe etnaviv authors struct sg_table *sgt = etnaviv_obj->sgt; 31a8c21a54SThe etnaviv authors 32a8c21a54SThe etnaviv authors /* 33a8c21a54SThe etnaviv authors * For non-cached buffers, ensure the new pages are clean 34a8c21a54SThe etnaviv authors * because display controller, GPU, etc. are not coherent. 35a8c21a54SThe etnaviv authors */ 36a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) 37a8c21a54SThe etnaviv authors dma_map_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); 38a8c21a54SThe etnaviv authors } 39a8c21a54SThe etnaviv authors 40a8c21a54SThe etnaviv authors static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj) 41a8c21a54SThe etnaviv authors { 42a8c21a54SThe etnaviv authors struct drm_device *dev = etnaviv_obj->base.dev; 43a8c21a54SThe etnaviv authors struct sg_table *sgt = etnaviv_obj->sgt; 44a8c21a54SThe etnaviv authors 45a8c21a54SThe etnaviv authors /* 46a8c21a54SThe etnaviv authors * For non-cached buffers, ensure the new pages are clean 47a8c21a54SThe etnaviv authors * because display controller, GPU, etc. are not coherent: 48a8c21a54SThe etnaviv authors * 49a8c21a54SThe etnaviv authors * WARNING: The DMA API does not support concurrent CPU 50a8c21a54SThe etnaviv authors * and device access to the memory area. With BIDIRECTIONAL, 51a8c21a54SThe etnaviv authors * we will clean the cache lines which overlap the region, 52a8c21a54SThe etnaviv authors * and invalidate all cache lines (partially) contained in 53a8c21a54SThe etnaviv authors * the region. 54a8c21a54SThe etnaviv authors * 55a8c21a54SThe etnaviv authors * If you have dirty data in the overlapping cache lines, 56a8c21a54SThe etnaviv authors * that will corrupt the GPU-written data. If you have 57a8c21a54SThe etnaviv authors * written into the remainder of the region, this can 58a8c21a54SThe etnaviv authors * discard those writes. 59a8c21a54SThe etnaviv authors */ 60a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) 61a8c21a54SThe etnaviv authors dma_unmap_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); 62a8c21a54SThe etnaviv authors } 63a8c21a54SThe etnaviv authors 64a8c21a54SThe etnaviv authors /* called with etnaviv_obj->lock held */ 65a8c21a54SThe etnaviv authors static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj) 66a8c21a54SThe etnaviv authors { 67a8c21a54SThe etnaviv authors struct drm_device *dev = etnaviv_obj->base.dev; 68a8c21a54SThe etnaviv authors struct page **p = drm_gem_get_pages(&etnaviv_obj->base); 69a8c21a54SThe etnaviv authors 70a8c21a54SThe etnaviv authors if (IS_ERR(p)) { 71f91ac470SLucas Stach dev_dbg(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); 72a8c21a54SThe etnaviv authors return PTR_ERR(p); 73a8c21a54SThe etnaviv authors } 74a8c21a54SThe etnaviv authors 75a8c21a54SThe etnaviv authors etnaviv_obj->pages = p; 76a8c21a54SThe etnaviv authors 77a8c21a54SThe etnaviv authors return 0; 78a8c21a54SThe etnaviv authors } 79a8c21a54SThe etnaviv authors 80a8c21a54SThe etnaviv authors static void put_pages(struct etnaviv_gem_object *etnaviv_obj) 81a8c21a54SThe etnaviv authors { 82a8c21a54SThe etnaviv authors if (etnaviv_obj->sgt) { 83a8c21a54SThe etnaviv authors etnaviv_gem_scatterlist_unmap(etnaviv_obj); 84a8c21a54SThe etnaviv authors sg_free_table(etnaviv_obj->sgt); 85a8c21a54SThe etnaviv authors kfree(etnaviv_obj->sgt); 86a8c21a54SThe etnaviv authors etnaviv_obj->sgt = NULL; 87a8c21a54SThe etnaviv authors } 88a8c21a54SThe etnaviv authors if (etnaviv_obj->pages) { 89a8c21a54SThe etnaviv authors drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages, 90a8c21a54SThe etnaviv authors true, false); 91a8c21a54SThe etnaviv authors 92a8c21a54SThe etnaviv authors etnaviv_obj->pages = NULL; 93a8c21a54SThe etnaviv authors } 94a8c21a54SThe etnaviv authors } 95a8c21a54SThe etnaviv authors 96a8c21a54SThe etnaviv authors struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) 97a8c21a54SThe etnaviv authors { 98a8c21a54SThe etnaviv authors int ret; 99a8c21a54SThe etnaviv authors 100a8c21a54SThe etnaviv authors lockdep_assert_held(&etnaviv_obj->lock); 101a8c21a54SThe etnaviv authors 102a8c21a54SThe etnaviv authors if (!etnaviv_obj->pages) { 103a8c21a54SThe etnaviv authors ret = etnaviv_obj->ops->get_pages(etnaviv_obj); 104a8c21a54SThe etnaviv authors if (ret < 0) 105a8c21a54SThe etnaviv authors return ERR_PTR(ret); 106a8c21a54SThe etnaviv authors } 107a8c21a54SThe etnaviv authors 108a8c21a54SThe etnaviv authors if (!etnaviv_obj->sgt) { 109a8c21a54SThe etnaviv authors struct drm_device *dev = etnaviv_obj->base.dev; 110a8c21a54SThe etnaviv authors int npages = etnaviv_obj->base.size >> PAGE_SHIFT; 111a8c21a54SThe etnaviv authors struct sg_table *sgt; 112a8c21a54SThe etnaviv authors 113a8c21a54SThe etnaviv authors sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages); 114a8c21a54SThe etnaviv authors if (IS_ERR(sgt)) { 115a8c21a54SThe etnaviv authors dev_err(dev->dev, "failed to allocate sgt: %ld\n", 116a8c21a54SThe etnaviv authors PTR_ERR(sgt)); 117a8c21a54SThe etnaviv authors return ERR_CAST(sgt); 118a8c21a54SThe etnaviv authors } 119a8c21a54SThe etnaviv authors 120a8c21a54SThe etnaviv authors etnaviv_obj->sgt = sgt; 121a8c21a54SThe etnaviv authors 122a8c21a54SThe etnaviv authors etnaviv_gem_scatter_map(etnaviv_obj); 123a8c21a54SThe etnaviv authors } 124a8c21a54SThe etnaviv authors 125a8c21a54SThe etnaviv authors return etnaviv_obj->pages; 126a8c21a54SThe etnaviv authors } 127a8c21a54SThe etnaviv authors 128a8c21a54SThe etnaviv authors void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj) 129a8c21a54SThe etnaviv authors { 130a8c21a54SThe etnaviv authors lockdep_assert_held(&etnaviv_obj->lock); 131a8c21a54SThe etnaviv authors /* when we start tracking the pin count, then do something here */ 132a8c21a54SThe etnaviv authors } 133a8c21a54SThe etnaviv authors 1340e7f26e6SLucas Stach static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, 135a8c21a54SThe etnaviv authors struct vm_area_struct *vma) 136a8c21a54SThe etnaviv authors { 137a8c21a54SThe etnaviv authors pgprot_t vm_page_prot; 138a8c21a54SThe etnaviv authors 139a8c21a54SThe etnaviv authors vma->vm_flags &= ~VM_PFNMAP; 140a8c21a54SThe etnaviv authors vma->vm_flags |= VM_MIXEDMAP; 141a8c21a54SThe etnaviv authors 142a8c21a54SThe etnaviv authors vm_page_prot = vm_get_page_prot(vma->vm_flags); 143a8c21a54SThe etnaviv authors 144a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_WC) { 145a8c21a54SThe etnaviv authors vma->vm_page_prot = pgprot_writecombine(vm_page_prot); 146a8c21a54SThe etnaviv authors } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) { 147a8c21a54SThe etnaviv authors vma->vm_page_prot = pgprot_noncached(vm_page_prot); 148a8c21a54SThe etnaviv authors } else { 149a8c21a54SThe etnaviv authors /* 150a8c21a54SThe etnaviv authors * Shunt off cached objs to shmem file so they have their own 151a8c21a54SThe etnaviv authors * address_space (so unmap_mapping_range does what we want, 152a8c21a54SThe etnaviv authors * in particular in the case of mmap'd dmabufs) 153a8c21a54SThe etnaviv authors */ 154a8c21a54SThe etnaviv authors fput(vma->vm_file); 1550e7f26e6SLucas Stach get_file(etnaviv_obj->base.filp); 156a8c21a54SThe etnaviv authors vma->vm_pgoff = 0; 1570e7f26e6SLucas Stach vma->vm_file = etnaviv_obj->base.filp; 158a8c21a54SThe etnaviv authors 159a8c21a54SThe etnaviv authors vma->vm_page_prot = vm_page_prot; 160a8c21a54SThe etnaviv authors } 161a8c21a54SThe etnaviv authors 162a8c21a54SThe etnaviv authors return 0; 163a8c21a54SThe etnaviv authors } 164a8c21a54SThe etnaviv authors 165a8c21a54SThe etnaviv authors int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma) 166a8c21a54SThe etnaviv authors { 167a8c21a54SThe etnaviv authors struct etnaviv_gem_object *obj; 168a8c21a54SThe etnaviv authors int ret; 169a8c21a54SThe etnaviv authors 170a8c21a54SThe etnaviv authors ret = drm_gem_mmap(filp, vma); 171a8c21a54SThe etnaviv authors if (ret) { 172a8c21a54SThe etnaviv authors DBG("mmap failed: %d", ret); 173a8c21a54SThe etnaviv authors return ret; 174a8c21a54SThe etnaviv authors } 175a8c21a54SThe etnaviv authors 176a8c21a54SThe etnaviv authors obj = to_etnaviv_bo(vma->vm_private_data); 177a10e2bdeSLucas Stach return obj->ops->mmap(obj, vma); 178a8c21a54SThe etnaviv authors } 179a8c21a54SThe etnaviv authors 18011bac800SDave Jiang int etnaviv_gem_fault(struct vm_fault *vmf) 181a8c21a54SThe etnaviv authors { 18211bac800SDave Jiang struct vm_area_struct *vma = vmf->vma; 183a8c21a54SThe etnaviv authors struct drm_gem_object *obj = vma->vm_private_data; 184a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 185a8c21a54SThe etnaviv authors struct page **pages, *page; 186a8c21a54SThe etnaviv authors pgoff_t pgoff; 187a8c21a54SThe etnaviv authors int ret; 188a8c21a54SThe etnaviv authors 189a8c21a54SThe etnaviv authors /* 190a8c21a54SThe etnaviv authors * Make sure we don't parallel update on a fault, nor move or remove 191a8c21a54SThe etnaviv authors * something from beneath our feet. Note that vm_insert_page() is 192a8c21a54SThe etnaviv authors * specifically coded to take care of this, so we don't have to. 193a8c21a54SThe etnaviv authors */ 194a8c21a54SThe etnaviv authors ret = mutex_lock_interruptible(&etnaviv_obj->lock); 195a8c21a54SThe etnaviv authors if (ret) 196a8c21a54SThe etnaviv authors goto out; 197a8c21a54SThe etnaviv authors 198a8c21a54SThe etnaviv authors /* make sure we have pages attached now */ 199a8c21a54SThe etnaviv authors pages = etnaviv_gem_get_pages(etnaviv_obj); 200a8c21a54SThe etnaviv authors mutex_unlock(&etnaviv_obj->lock); 201a8c21a54SThe etnaviv authors 202a8c21a54SThe etnaviv authors if (IS_ERR(pages)) { 203a8c21a54SThe etnaviv authors ret = PTR_ERR(pages); 204a8c21a54SThe etnaviv authors goto out; 205a8c21a54SThe etnaviv authors } 206a8c21a54SThe etnaviv authors 207a8c21a54SThe etnaviv authors /* We don't use vmf->pgoff since that has the fake offset: */ 2081a29d85eSJan Kara pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 209a8c21a54SThe etnaviv authors 210a8c21a54SThe etnaviv authors page = pages[pgoff]; 211a8c21a54SThe etnaviv authors 2121a29d85eSJan Kara VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 213a8c21a54SThe etnaviv authors page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT); 214a8c21a54SThe etnaviv authors 2151a29d85eSJan Kara ret = vm_insert_page(vma, vmf->address, page); 216a8c21a54SThe etnaviv authors 217a8c21a54SThe etnaviv authors out: 218a8c21a54SThe etnaviv authors switch (ret) { 219a8c21a54SThe etnaviv authors case -EAGAIN: 220a8c21a54SThe etnaviv authors case 0: 221a8c21a54SThe etnaviv authors case -ERESTARTSYS: 222a8c21a54SThe etnaviv authors case -EINTR: 223a8c21a54SThe etnaviv authors case -EBUSY: 224a8c21a54SThe etnaviv authors /* 225a8c21a54SThe etnaviv authors * EBUSY is ok: this just means that another thread 226a8c21a54SThe etnaviv authors * already did the job. 227a8c21a54SThe etnaviv authors */ 228a8c21a54SThe etnaviv authors return VM_FAULT_NOPAGE; 229a8c21a54SThe etnaviv authors case -ENOMEM: 230a8c21a54SThe etnaviv authors return VM_FAULT_OOM; 231a8c21a54SThe etnaviv authors default: 232a8c21a54SThe etnaviv authors return VM_FAULT_SIGBUS; 233a8c21a54SThe etnaviv authors } 234a8c21a54SThe etnaviv authors } 235a8c21a54SThe etnaviv authors 236a8c21a54SThe etnaviv authors int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset) 237a8c21a54SThe etnaviv authors { 238a8c21a54SThe etnaviv authors int ret; 239a8c21a54SThe etnaviv authors 240a8c21a54SThe etnaviv authors /* Make it mmapable */ 241a8c21a54SThe etnaviv authors ret = drm_gem_create_mmap_offset(obj); 242a8c21a54SThe etnaviv authors if (ret) 243a8c21a54SThe etnaviv authors dev_err(obj->dev->dev, "could not allocate mmap offset\n"); 244a8c21a54SThe etnaviv authors else 245a8c21a54SThe etnaviv authors *offset = drm_vma_node_offset_addr(&obj->vma_node); 246a8c21a54SThe etnaviv authors 247a8c21a54SThe etnaviv authors return ret; 248a8c21a54SThe etnaviv authors } 249a8c21a54SThe etnaviv authors 250a8c21a54SThe etnaviv authors static struct etnaviv_vram_mapping * 251a8c21a54SThe etnaviv authors etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj, 252a8c21a54SThe etnaviv authors struct etnaviv_iommu *mmu) 253a8c21a54SThe etnaviv authors { 254a8c21a54SThe etnaviv authors struct etnaviv_vram_mapping *mapping; 255a8c21a54SThe etnaviv authors 256a8c21a54SThe etnaviv authors list_for_each_entry(mapping, &obj->vram_list, obj_node) { 257a8c21a54SThe etnaviv authors if (mapping->mmu == mmu) 258a8c21a54SThe etnaviv authors return mapping; 259a8c21a54SThe etnaviv authors } 260a8c21a54SThe etnaviv authors 261a8c21a54SThe etnaviv authors return NULL; 262a8c21a54SThe etnaviv authors } 263a8c21a54SThe etnaviv authors 264b6325f40SRussell King void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping) 265b6325f40SRussell King { 266b6325f40SRussell King struct etnaviv_gem_object *etnaviv_obj = mapping->object; 267b6325f40SRussell King 26823d1dd03SCihangir Akturk drm_gem_object_get(&etnaviv_obj->base); 269b6325f40SRussell King 270b6325f40SRussell King mutex_lock(&etnaviv_obj->lock); 271b6325f40SRussell King WARN_ON(mapping->use == 0); 272b6325f40SRussell King mapping->use += 1; 273b6325f40SRussell King mutex_unlock(&etnaviv_obj->lock); 274b6325f40SRussell King } 275b6325f40SRussell King 276b6325f40SRussell King void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) 277b6325f40SRussell King { 278b6325f40SRussell King struct etnaviv_gem_object *etnaviv_obj = mapping->object; 279b6325f40SRussell King 280b6325f40SRussell King mutex_lock(&etnaviv_obj->lock); 281b6325f40SRussell King WARN_ON(mapping->use == 0); 282b6325f40SRussell King mapping->use -= 1; 283b6325f40SRussell King mutex_unlock(&etnaviv_obj->lock); 284b6325f40SRussell King 28523d1dd03SCihangir Akturk drm_gem_object_put_unlocked(&etnaviv_obj->base); 286b6325f40SRussell King } 287b6325f40SRussell King 288b6325f40SRussell King struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( 289b6325f40SRussell King struct drm_gem_object *obj, struct etnaviv_gpu *gpu) 290a8c21a54SThe etnaviv authors { 291a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 292a8c21a54SThe etnaviv authors struct etnaviv_vram_mapping *mapping; 293a8c21a54SThe etnaviv authors struct page **pages; 294a8c21a54SThe etnaviv authors int ret = 0; 295a8c21a54SThe etnaviv authors 296a8c21a54SThe etnaviv authors mutex_lock(&etnaviv_obj->lock); 297a8c21a54SThe etnaviv authors mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, gpu->mmu); 298a8c21a54SThe etnaviv authors if (mapping) { 299a8c21a54SThe etnaviv authors /* 300a8c21a54SThe etnaviv authors * Holding the object lock prevents the use count changing 301a8c21a54SThe etnaviv authors * beneath us. If the use count is zero, the MMU might be 302a8c21a54SThe etnaviv authors * reaping this object, so take the lock and re-check that 303a8c21a54SThe etnaviv authors * the MMU owns this mapping to close this race. 304a8c21a54SThe etnaviv authors */ 305a8c21a54SThe etnaviv authors if (mapping->use == 0) { 306a8c21a54SThe etnaviv authors mutex_lock(&gpu->mmu->lock); 307a8c21a54SThe etnaviv authors if (mapping->mmu == gpu->mmu) 308a8c21a54SThe etnaviv authors mapping->use += 1; 309a8c21a54SThe etnaviv authors else 310a8c21a54SThe etnaviv authors mapping = NULL; 311a8c21a54SThe etnaviv authors mutex_unlock(&gpu->mmu->lock); 312a8c21a54SThe etnaviv authors if (mapping) 313a8c21a54SThe etnaviv authors goto out; 314a8c21a54SThe etnaviv authors } else { 315a8c21a54SThe etnaviv authors mapping->use += 1; 316a8c21a54SThe etnaviv authors goto out; 317a8c21a54SThe etnaviv authors } 318a8c21a54SThe etnaviv authors } 319a8c21a54SThe etnaviv authors 320a8c21a54SThe etnaviv authors pages = etnaviv_gem_get_pages(etnaviv_obj); 321a8c21a54SThe etnaviv authors if (IS_ERR(pages)) { 322a8c21a54SThe etnaviv authors ret = PTR_ERR(pages); 323a8c21a54SThe etnaviv authors goto out; 324a8c21a54SThe etnaviv authors } 325a8c21a54SThe etnaviv authors 326a8c21a54SThe etnaviv authors /* 327a8c21a54SThe etnaviv authors * See if we have a reaped vram mapping we can re-use before 328a8c21a54SThe etnaviv authors * allocating a fresh mapping. 329a8c21a54SThe etnaviv authors */ 330a8c21a54SThe etnaviv authors mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL); 331a8c21a54SThe etnaviv authors if (!mapping) { 332a8c21a54SThe etnaviv authors mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); 333ed94add0SDan Carpenter if (!mapping) { 334ed94add0SDan Carpenter ret = -ENOMEM; 335ed94add0SDan Carpenter goto out; 336ed94add0SDan Carpenter } 337a8c21a54SThe etnaviv authors 338a8c21a54SThe etnaviv authors INIT_LIST_HEAD(&mapping->scan_node); 339a8c21a54SThe etnaviv authors mapping->object = etnaviv_obj; 340a8c21a54SThe etnaviv authors } else { 341a8c21a54SThe etnaviv authors list_del(&mapping->obj_node); 342a8c21a54SThe etnaviv authors } 343a8c21a54SThe etnaviv authors 344a8c21a54SThe etnaviv authors mapping->mmu = gpu->mmu; 345a8c21a54SThe etnaviv authors mapping->use = 1; 346a8c21a54SThe etnaviv authors 347a8c21a54SThe etnaviv authors ret = etnaviv_iommu_map_gem(gpu->mmu, etnaviv_obj, gpu->memory_base, 348a8c21a54SThe etnaviv authors mapping); 349a8c21a54SThe etnaviv authors if (ret < 0) 350a8c21a54SThe etnaviv authors kfree(mapping); 351a8c21a54SThe etnaviv authors else 352a8c21a54SThe etnaviv authors list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list); 353a8c21a54SThe etnaviv authors 354a8c21a54SThe etnaviv authors out: 355a8c21a54SThe etnaviv authors mutex_unlock(&etnaviv_obj->lock); 356a8c21a54SThe etnaviv authors 357b6325f40SRussell King if (ret) 358b6325f40SRussell King return ERR_PTR(ret); 359b6325f40SRussell King 360a8c21a54SThe etnaviv authors /* Take a reference on the object */ 36123d1dd03SCihangir Akturk drm_gem_object_get(obj); 362b6325f40SRussell King return mapping; 363a8c21a54SThe etnaviv authors } 364a8c21a54SThe etnaviv authors 365ce3088fdSLucas Stach void *etnaviv_gem_vmap(struct drm_gem_object *obj) 366a8c21a54SThe etnaviv authors { 367a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 368a8c21a54SThe etnaviv authors 369a0a5ab3eSLucas Stach if (etnaviv_obj->vaddr) 370a0a5ab3eSLucas Stach return etnaviv_obj->vaddr; 371a0a5ab3eSLucas Stach 372a8c21a54SThe etnaviv authors mutex_lock(&etnaviv_obj->lock); 373a0a5ab3eSLucas Stach /* 374a0a5ab3eSLucas Stach * Need to check again, as we might have raced with another thread 375a0a5ab3eSLucas Stach * while waiting for the mutex. 376a0a5ab3eSLucas Stach */ 377a0a5ab3eSLucas Stach if (!etnaviv_obj->vaddr) 378a0a5ab3eSLucas Stach etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj); 379a8c21a54SThe etnaviv authors mutex_unlock(&etnaviv_obj->lock); 380a8c21a54SThe etnaviv authors 381a8c21a54SThe etnaviv authors return etnaviv_obj->vaddr; 382a8c21a54SThe etnaviv authors } 383a8c21a54SThe etnaviv authors 384a0a5ab3eSLucas Stach static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj) 385a0a5ab3eSLucas Stach { 386a0a5ab3eSLucas Stach struct page **pages; 387a0a5ab3eSLucas Stach 388a0a5ab3eSLucas Stach lockdep_assert_held(&obj->lock); 389a0a5ab3eSLucas Stach 390a0a5ab3eSLucas Stach pages = etnaviv_gem_get_pages(obj); 391a0a5ab3eSLucas Stach if (IS_ERR(pages)) 392a0a5ab3eSLucas Stach return NULL; 393a0a5ab3eSLucas Stach 394a0a5ab3eSLucas Stach return vmap(pages, obj->base.size >> PAGE_SHIFT, 395a0a5ab3eSLucas Stach VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 396a0a5ab3eSLucas Stach } 397a0a5ab3eSLucas Stach 398a8c21a54SThe etnaviv authors static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) 399a8c21a54SThe etnaviv authors { 400a8c21a54SThe etnaviv authors if (op & ETNA_PREP_READ) 401a8c21a54SThe etnaviv authors return DMA_FROM_DEVICE; 402a8c21a54SThe etnaviv authors else if (op & ETNA_PREP_WRITE) 403a8c21a54SThe etnaviv authors return DMA_TO_DEVICE; 404a8c21a54SThe etnaviv authors else 405a8c21a54SThe etnaviv authors return DMA_BIDIRECTIONAL; 406a8c21a54SThe etnaviv authors } 407a8c21a54SThe etnaviv authors 408a8c21a54SThe etnaviv authors int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, 409a8c21a54SThe etnaviv authors struct timespec *timeout) 410a8c21a54SThe etnaviv authors { 411a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 412a8c21a54SThe etnaviv authors struct drm_device *dev = obj->dev; 413a8c21a54SThe etnaviv authors bool write = !!(op & ETNA_PREP_WRITE); 41446a269daSLucas Stach int ret; 415a8c21a54SThe etnaviv authors 4168cc47b3eSLucas Stach if (!etnaviv_obj->sgt) { 4178cc47b3eSLucas Stach void *ret; 4188cc47b3eSLucas Stach 4198cc47b3eSLucas Stach mutex_lock(&etnaviv_obj->lock); 4208cc47b3eSLucas Stach ret = etnaviv_gem_get_pages(etnaviv_obj); 4218cc47b3eSLucas Stach mutex_unlock(&etnaviv_obj->lock); 4228cc47b3eSLucas Stach if (IS_ERR(ret)) 4238cc47b3eSLucas Stach return PTR_ERR(ret); 4248cc47b3eSLucas Stach } 4258cc47b3eSLucas Stach 42646a269daSLucas Stach if (op & ETNA_PREP_NOSYNC) { 42746a269daSLucas Stach if (!reservation_object_test_signaled_rcu(etnaviv_obj->resv, 42846a269daSLucas Stach write)) 42946a269daSLucas Stach return -EBUSY; 43046a269daSLucas Stach } else { 43146a269daSLucas Stach unsigned long remain = etnaviv_timeout_to_jiffies(timeout); 43246a269daSLucas Stach 43346a269daSLucas Stach ret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv, 434a8c21a54SThe etnaviv authors write, true, remain); 43546a269daSLucas Stach if (ret <= 0) 43646a269daSLucas Stach return ret == 0 ? -ETIMEDOUT : ret; 43746a269daSLucas Stach } 438a8c21a54SThe etnaviv authors 439a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_CACHED) { 440a8c21a54SThe etnaviv authors dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl, 441a8c21a54SThe etnaviv authors etnaviv_obj->sgt->nents, 442a8c21a54SThe etnaviv authors etnaviv_op_to_dma_dir(op)); 443a8c21a54SThe etnaviv authors etnaviv_obj->last_cpu_prep_op = op; 444a8c21a54SThe etnaviv authors } 445a8c21a54SThe etnaviv authors 446a8c21a54SThe etnaviv authors return 0; 447a8c21a54SThe etnaviv authors } 448a8c21a54SThe etnaviv authors 449a8c21a54SThe etnaviv authors int etnaviv_gem_cpu_fini(struct drm_gem_object *obj) 450a8c21a54SThe etnaviv authors { 451a8c21a54SThe etnaviv authors struct drm_device *dev = obj->dev; 452a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 453a8c21a54SThe etnaviv authors 454a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_CACHED) { 455a8c21a54SThe etnaviv authors /* fini without a prep is almost certainly a userspace error */ 456a8c21a54SThe etnaviv authors WARN_ON(etnaviv_obj->last_cpu_prep_op == 0); 457a8c21a54SThe etnaviv authors dma_sync_sg_for_device(dev->dev, etnaviv_obj->sgt->sgl, 458a8c21a54SThe etnaviv authors etnaviv_obj->sgt->nents, 459a8c21a54SThe etnaviv authors etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op)); 460a8c21a54SThe etnaviv authors etnaviv_obj->last_cpu_prep_op = 0; 461a8c21a54SThe etnaviv authors } 462a8c21a54SThe etnaviv authors 463a8c21a54SThe etnaviv authors return 0; 464a8c21a54SThe etnaviv authors } 465a8c21a54SThe etnaviv authors 466a8c21a54SThe etnaviv authors int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj, 467a8c21a54SThe etnaviv authors struct timespec *timeout) 468a8c21a54SThe etnaviv authors { 469a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 470a8c21a54SThe etnaviv authors 471a8c21a54SThe etnaviv authors return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout); 472a8c21a54SThe etnaviv authors } 473a8c21a54SThe etnaviv authors 474a8c21a54SThe etnaviv authors #ifdef CONFIG_DEBUG_FS 475f54d1867SChris Wilson static void etnaviv_gem_describe_fence(struct dma_fence *fence, 476a8c21a54SThe etnaviv authors const char *type, struct seq_file *m) 477a8c21a54SThe etnaviv authors { 478f54d1867SChris Wilson if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) 479a8c21a54SThe etnaviv authors seq_printf(m, "\t%9s: %s %s seq %u\n", 480a8c21a54SThe etnaviv authors type, 481a8c21a54SThe etnaviv authors fence->ops->get_driver_name(fence), 482a8c21a54SThe etnaviv authors fence->ops->get_timeline_name(fence), 483a8c21a54SThe etnaviv authors fence->seqno); 484a8c21a54SThe etnaviv authors } 485a8c21a54SThe etnaviv authors 486a8c21a54SThe etnaviv authors static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 487a8c21a54SThe etnaviv authors { 488a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 489a8c21a54SThe etnaviv authors struct reservation_object *robj = etnaviv_obj->resv; 490a8c21a54SThe etnaviv authors struct reservation_object_list *fobj; 491f54d1867SChris Wilson struct dma_fence *fence; 492a8c21a54SThe etnaviv authors unsigned long off = drm_vma_node_start(&obj->vma_node); 493a8c21a54SThe etnaviv authors 494a8c21a54SThe etnaviv authors seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n", 495a8c21a54SThe etnaviv authors etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I', 4962c935bc5SPeter Zijlstra obj->name, kref_read(&obj->refcount), 497a8c21a54SThe etnaviv authors off, etnaviv_obj->vaddr, obj->size); 498a8c21a54SThe etnaviv authors 499a8c21a54SThe etnaviv authors rcu_read_lock(); 500a8c21a54SThe etnaviv authors fobj = rcu_dereference(robj->fence); 501a8c21a54SThe etnaviv authors if (fobj) { 502a8c21a54SThe etnaviv authors unsigned int i, shared_count = fobj->shared_count; 503a8c21a54SThe etnaviv authors 504a8c21a54SThe etnaviv authors for (i = 0; i < shared_count; i++) { 505a8c21a54SThe etnaviv authors fence = rcu_dereference(fobj->shared[i]); 506a8c21a54SThe etnaviv authors etnaviv_gem_describe_fence(fence, "Shared", m); 507a8c21a54SThe etnaviv authors } 508a8c21a54SThe etnaviv authors } 509a8c21a54SThe etnaviv authors 510a8c21a54SThe etnaviv authors fence = rcu_dereference(robj->fence_excl); 511a8c21a54SThe etnaviv authors if (fence) 512a8c21a54SThe etnaviv authors etnaviv_gem_describe_fence(fence, "Exclusive", m); 513a8c21a54SThe etnaviv authors rcu_read_unlock(); 514a8c21a54SThe etnaviv authors } 515a8c21a54SThe etnaviv authors 516a8c21a54SThe etnaviv authors void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv, 517a8c21a54SThe etnaviv authors struct seq_file *m) 518a8c21a54SThe etnaviv authors { 519a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj; 520a8c21a54SThe etnaviv authors int count = 0; 521a8c21a54SThe etnaviv authors size_t size = 0; 522a8c21a54SThe etnaviv authors 523a8c21a54SThe etnaviv authors mutex_lock(&priv->gem_lock); 524a8c21a54SThe etnaviv authors list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) { 525a8c21a54SThe etnaviv authors struct drm_gem_object *obj = &etnaviv_obj->base; 526a8c21a54SThe etnaviv authors 527a8c21a54SThe etnaviv authors seq_puts(m, " "); 528a8c21a54SThe etnaviv authors etnaviv_gem_describe(obj, m); 529a8c21a54SThe etnaviv authors count++; 530a8c21a54SThe etnaviv authors size += obj->size; 531a8c21a54SThe etnaviv authors } 532a8c21a54SThe etnaviv authors mutex_unlock(&priv->gem_lock); 533a8c21a54SThe etnaviv authors 534a8c21a54SThe etnaviv authors seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 535a8c21a54SThe etnaviv authors } 536a8c21a54SThe etnaviv authors #endif 537a8c21a54SThe etnaviv authors 538a8c21a54SThe etnaviv authors static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj) 539a8c21a54SThe etnaviv authors { 540a8c21a54SThe etnaviv authors vunmap(etnaviv_obj->vaddr); 541a8c21a54SThe etnaviv authors put_pages(etnaviv_obj); 542a8c21a54SThe etnaviv authors } 543a8c21a54SThe etnaviv authors 544a8c21a54SThe etnaviv authors static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { 545a8c21a54SThe etnaviv authors .get_pages = etnaviv_gem_shmem_get_pages, 546a8c21a54SThe etnaviv authors .release = etnaviv_gem_shmem_release, 547a0a5ab3eSLucas Stach .vmap = etnaviv_gem_vmap_impl, 548a10e2bdeSLucas Stach .mmap = etnaviv_gem_mmap_obj, 549a8c21a54SThe etnaviv authors }; 550a8c21a54SThe etnaviv authors 551a8c21a54SThe etnaviv authors void etnaviv_gem_free_object(struct drm_gem_object *obj) 552a8c21a54SThe etnaviv authors { 553a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 55451841752SLucas Stach struct etnaviv_drm_private *priv = obj->dev->dev_private; 555a8c21a54SThe etnaviv authors struct etnaviv_vram_mapping *mapping, *tmp; 556a8c21a54SThe etnaviv authors 557a8c21a54SThe etnaviv authors /* object should not be active */ 558a8c21a54SThe etnaviv authors WARN_ON(is_active(etnaviv_obj)); 559a8c21a54SThe etnaviv authors 56051841752SLucas Stach mutex_lock(&priv->gem_lock); 561a8c21a54SThe etnaviv authors list_del(&etnaviv_obj->gem_node); 56251841752SLucas Stach mutex_unlock(&priv->gem_lock); 563a8c21a54SThe etnaviv authors 564a8c21a54SThe etnaviv authors list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, 565a8c21a54SThe etnaviv authors obj_node) { 566a8c21a54SThe etnaviv authors struct etnaviv_iommu *mmu = mapping->mmu; 567a8c21a54SThe etnaviv authors 568a8c21a54SThe etnaviv authors WARN_ON(mapping->use); 569a8c21a54SThe etnaviv authors 570a8c21a54SThe etnaviv authors if (mmu) 571a8c21a54SThe etnaviv authors etnaviv_iommu_unmap_gem(mmu, mapping); 572a8c21a54SThe etnaviv authors 573a8c21a54SThe etnaviv authors list_del(&mapping->obj_node); 574a8c21a54SThe etnaviv authors kfree(mapping); 575a8c21a54SThe etnaviv authors } 576a8c21a54SThe etnaviv authors 577a8c21a54SThe etnaviv authors drm_gem_free_mmap_offset(obj); 578a8c21a54SThe etnaviv authors etnaviv_obj->ops->release(etnaviv_obj); 579a8c21a54SThe etnaviv authors if (etnaviv_obj->resv == &etnaviv_obj->_resv) 580a8c21a54SThe etnaviv authors reservation_object_fini(&etnaviv_obj->_resv); 581a8c21a54SThe etnaviv authors drm_gem_object_release(obj); 582a8c21a54SThe etnaviv authors 583a8c21a54SThe etnaviv authors kfree(etnaviv_obj); 584a8c21a54SThe etnaviv authors } 585a8c21a54SThe etnaviv authors 586a8c21a54SThe etnaviv authors int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) 587a8c21a54SThe etnaviv authors { 588a8c21a54SThe etnaviv authors struct etnaviv_drm_private *priv = dev->dev_private; 589a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 590a8c21a54SThe etnaviv authors 591a8c21a54SThe etnaviv authors mutex_lock(&priv->gem_lock); 592a8c21a54SThe etnaviv authors list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); 593a8c21a54SThe etnaviv authors mutex_unlock(&priv->gem_lock); 594a8c21a54SThe etnaviv authors 595a8c21a54SThe etnaviv authors return 0; 596a8c21a54SThe etnaviv authors } 597a8c21a54SThe etnaviv authors 598a8c21a54SThe etnaviv authors static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, 599a8c21a54SThe etnaviv authors struct reservation_object *robj, const struct etnaviv_gem_ops *ops, 600a8c21a54SThe etnaviv authors struct drm_gem_object **obj) 601a8c21a54SThe etnaviv authors { 602a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj; 603a8c21a54SThe etnaviv authors unsigned sz = sizeof(*etnaviv_obj); 604a8c21a54SThe etnaviv authors bool valid = true; 605a8c21a54SThe etnaviv authors 606a8c21a54SThe etnaviv authors /* validate flags */ 607a8c21a54SThe etnaviv authors switch (flags & ETNA_BO_CACHE_MASK) { 608a8c21a54SThe etnaviv authors case ETNA_BO_UNCACHED: 609a8c21a54SThe etnaviv authors case ETNA_BO_CACHED: 610a8c21a54SThe etnaviv authors case ETNA_BO_WC: 611a8c21a54SThe etnaviv authors break; 612a8c21a54SThe etnaviv authors default: 613a8c21a54SThe etnaviv authors valid = false; 614a8c21a54SThe etnaviv authors } 615a8c21a54SThe etnaviv authors 616a8c21a54SThe etnaviv authors if (!valid) { 617a8c21a54SThe etnaviv authors dev_err(dev->dev, "invalid cache flag: %x\n", 618a8c21a54SThe etnaviv authors (flags & ETNA_BO_CACHE_MASK)); 619a8c21a54SThe etnaviv authors return -EINVAL; 620a8c21a54SThe etnaviv authors } 621a8c21a54SThe etnaviv authors 622a8c21a54SThe etnaviv authors etnaviv_obj = kzalloc(sz, GFP_KERNEL); 623a8c21a54SThe etnaviv authors if (!etnaviv_obj) 624a8c21a54SThe etnaviv authors return -ENOMEM; 625a8c21a54SThe etnaviv authors 626a8c21a54SThe etnaviv authors etnaviv_obj->flags = flags; 627a8c21a54SThe etnaviv authors etnaviv_obj->ops = ops; 628a8c21a54SThe etnaviv authors if (robj) { 629a8c21a54SThe etnaviv authors etnaviv_obj->resv = robj; 630a8c21a54SThe etnaviv authors } else { 631a8c21a54SThe etnaviv authors etnaviv_obj->resv = &etnaviv_obj->_resv; 632a8c21a54SThe etnaviv authors reservation_object_init(&etnaviv_obj->_resv); 633a8c21a54SThe etnaviv authors } 634a8c21a54SThe etnaviv authors 635a8c21a54SThe etnaviv authors mutex_init(&etnaviv_obj->lock); 636a8c21a54SThe etnaviv authors INIT_LIST_HEAD(&etnaviv_obj->vram_list); 637a8c21a54SThe etnaviv authors 638a8c21a54SThe etnaviv authors *obj = &etnaviv_obj->base; 639a8c21a54SThe etnaviv authors 640a8c21a54SThe etnaviv authors return 0; 641a8c21a54SThe etnaviv authors } 642a8c21a54SThe etnaviv authors 643a8c21a54SThe etnaviv authors static struct drm_gem_object *__etnaviv_gem_new(struct drm_device *dev, 644a8c21a54SThe etnaviv authors u32 size, u32 flags) 645a8c21a54SThe etnaviv authors { 646a8c21a54SThe etnaviv authors struct drm_gem_object *obj = NULL; 647a8c21a54SThe etnaviv authors int ret; 648a8c21a54SThe etnaviv authors 649a8c21a54SThe etnaviv authors size = PAGE_ALIGN(size); 650a8c21a54SThe etnaviv authors 651a8c21a54SThe etnaviv authors ret = etnaviv_gem_new_impl(dev, size, flags, NULL, 652a8c21a54SThe etnaviv authors &etnaviv_gem_shmem_ops, &obj); 653a8c21a54SThe etnaviv authors if (ret) 654a8c21a54SThe etnaviv authors goto fail; 655a8c21a54SThe etnaviv authors 656a8c21a54SThe etnaviv authors ret = drm_gem_object_init(dev, obj, size); 657a8c21a54SThe etnaviv authors if (ret == 0) { 658a8c21a54SThe etnaviv authors struct address_space *mapping; 659a8c21a54SThe etnaviv authors 660a8c21a54SThe etnaviv authors /* 661a8c21a54SThe etnaviv authors * Our buffers are kept pinned, so allocating them 662a8c21a54SThe etnaviv authors * from the MOVABLE zone is a really bad idea, and 663a8c21a54SThe etnaviv authors * conflicts with CMA. See coments above new_inode() 664a8c21a54SThe etnaviv authors * why this is required _and_ expected if you're 665a8c21a54SThe etnaviv authors * going to pin these pages. 666a8c21a54SThe etnaviv authors */ 66793c76a3dSAl Viro mapping = obj->filp->f_mapping; 6686cbf0400SLucas Stach mapping_set_gfp_mask(mapping, GFP_HIGHUSER | 66965375b87SLucas Stach __GFP_RETRY_MAYFAIL | __GFP_NOWARN); 670a8c21a54SThe etnaviv authors } 671a8c21a54SThe etnaviv authors 672a8c21a54SThe etnaviv authors if (ret) 673a8c21a54SThe etnaviv authors goto fail; 674a8c21a54SThe etnaviv authors 675a8c21a54SThe etnaviv authors return obj; 676a8c21a54SThe etnaviv authors 677a8c21a54SThe etnaviv authors fail: 67823d1dd03SCihangir Akturk drm_gem_object_put_unlocked(obj); 679a8c21a54SThe etnaviv authors return ERR_PTR(ret); 680a8c21a54SThe etnaviv authors } 681a8c21a54SThe etnaviv authors 682a8c21a54SThe etnaviv authors /* convenience method to construct a GEM buffer object, and userspace handle */ 683a8c21a54SThe etnaviv authors int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, 684a8c21a54SThe etnaviv authors u32 size, u32 flags, u32 *handle) 685a8c21a54SThe etnaviv authors { 686a8c21a54SThe etnaviv authors struct drm_gem_object *obj; 687a8c21a54SThe etnaviv authors int ret; 688a8c21a54SThe etnaviv authors 689a8c21a54SThe etnaviv authors obj = __etnaviv_gem_new(dev, size, flags); 690a8c21a54SThe etnaviv authors if (IS_ERR(obj)) 691a8c21a54SThe etnaviv authors return PTR_ERR(obj); 692a8c21a54SThe etnaviv authors 693a8c21a54SThe etnaviv authors ret = etnaviv_gem_obj_add(dev, obj); 694a8c21a54SThe etnaviv authors if (ret < 0) { 69523d1dd03SCihangir Akturk drm_gem_object_put_unlocked(obj); 696a8c21a54SThe etnaviv authors return ret; 697a8c21a54SThe etnaviv authors } 698a8c21a54SThe etnaviv authors 699a8c21a54SThe etnaviv authors ret = drm_gem_handle_create(file, obj, handle); 700a8c21a54SThe etnaviv authors 701a8c21a54SThe etnaviv authors /* drop reference from allocate - handle holds it now */ 70223d1dd03SCihangir Akturk drm_gem_object_put_unlocked(obj); 703a8c21a54SThe etnaviv authors 704a8c21a54SThe etnaviv authors return ret; 705a8c21a54SThe etnaviv authors } 706a8c21a54SThe etnaviv authors 707a8c21a54SThe etnaviv authors struct drm_gem_object *etnaviv_gem_new(struct drm_device *dev, 708a8c21a54SThe etnaviv authors u32 size, u32 flags) 709a8c21a54SThe etnaviv authors { 710a8c21a54SThe etnaviv authors struct drm_gem_object *obj; 711a8c21a54SThe etnaviv authors int ret; 712a8c21a54SThe etnaviv authors 713a8c21a54SThe etnaviv authors obj = __etnaviv_gem_new(dev, size, flags); 714a8c21a54SThe etnaviv authors if (IS_ERR(obj)) 715a8c21a54SThe etnaviv authors return obj; 716a8c21a54SThe etnaviv authors 717a8c21a54SThe etnaviv authors ret = etnaviv_gem_obj_add(dev, obj); 718a8c21a54SThe etnaviv authors if (ret < 0) { 71923d1dd03SCihangir Akturk drm_gem_object_put_unlocked(obj); 720a8c21a54SThe etnaviv authors return ERR_PTR(ret); 721a8c21a54SThe etnaviv authors } 722a8c21a54SThe etnaviv authors 723a8c21a54SThe etnaviv authors return obj; 724a8c21a54SThe etnaviv authors } 725a8c21a54SThe etnaviv authors 726a8c21a54SThe etnaviv authors int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, 727a8c21a54SThe etnaviv authors struct reservation_object *robj, const struct etnaviv_gem_ops *ops, 728a8c21a54SThe etnaviv authors struct etnaviv_gem_object **res) 729a8c21a54SThe etnaviv authors { 730a8c21a54SThe etnaviv authors struct drm_gem_object *obj; 731a8c21a54SThe etnaviv authors int ret; 732a8c21a54SThe etnaviv authors 733a8c21a54SThe etnaviv authors ret = etnaviv_gem_new_impl(dev, size, flags, robj, ops, &obj); 734a8c21a54SThe etnaviv authors if (ret) 735a8c21a54SThe etnaviv authors return ret; 736a8c21a54SThe etnaviv authors 737a8c21a54SThe etnaviv authors drm_gem_private_object_init(dev, obj, size); 738a8c21a54SThe etnaviv authors 739a8c21a54SThe etnaviv authors *res = to_etnaviv_bo(obj); 740a8c21a54SThe etnaviv authors 741a8c21a54SThe etnaviv authors return 0; 742a8c21a54SThe etnaviv authors } 743a8c21a54SThe etnaviv authors 744a8c21a54SThe etnaviv authors struct get_pages_work { 745a8c21a54SThe etnaviv authors struct work_struct work; 746a8c21a54SThe etnaviv authors struct mm_struct *mm; 747a8c21a54SThe etnaviv authors struct task_struct *task; 748a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj; 749a8c21a54SThe etnaviv authors }; 750a8c21a54SThe etnaviv authors 751a8c21a54SThe etnaviv authors static struct page **etnaviv_gem_userptr_do_get_pages( 752a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj, struct mm_struct *mm, struct task_struct *task) 753a8c21a54SThe etnaviv authors { 754a8c21a54SThe etnaviv authors int ret = 0, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT; 755a8c21a54SThe etnaviv authors struct page **pvec; 756a8c21a54SThe etnaviv authors uintptr_t ptr; 7579beae1eaSLorenzo Stoakes unsigned int flags = 0; 758a8c21a54SThe etnaviv authors 7592098105eSMichal Hocko pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 760a8c21a54SThe etnaviv authors if (!pvec) 761a8c21a54SThe etnaviv authors return ERR_PTR(-ENOMEM); 762a8c21a54SThe etnaviv authors 7639beae1eaSLorenzo Stoakes if (!etnaviv_obj->userptr.ro) 7649beae1eaSLorenzo Stoakes flags |= FOLL_WRITE; 7659beae1eaSLorenzo Stoakes 766a8c21a54SThe etnaviv authors pinned = 0; 767a8c21a54SThe etnaviv authors ptr = etnaviv_obj->userptr.ptr; 768a8c21a54SThe etnaviv authors 769a8c21a54SThe etnaviv authors down_read(&mm->mmap_sem); 770a8c21a54SThe etnaviv authors while (pinned < npages) { 7711e987790SDave Hansen ret = get_user_pages_remote(task, mm, ptr, npages - pinned, 7725b56d49fSLorenzo Stoakes flags, pvec + pinned, NULL, NULL); 773a8c21a54SThe etnaviv authors if (ret < 0) 774a8c21a54SThe etnaviv authors break; 775a8c21a54SThe etnaviv authors 776a8c21a54SThe etnaviv authors ptr += ret * PAGE_SIZE; 777a8c21a54SThe etnaviv authors pinned += ret; 778a8c21a54SThe etnaviv authors } 779a8c21a54SThe etnaviv authors up_read(&mm->mmap_sem); 780a8c21a54SThe etnaviv authors 781a8c21a54SThe etnaviv authors if (ret < 0) { 782c6f92f9fSMel Gorman release_pages(pvec, pinned); 7832098105eSMichal Hocko kvfree(pvec); 784a8c21a54SThe etnaviv authors return ERR_PTR(ret); 785a8c21a54SThe etnaviv authors } 786a8c21a54SThe etnaviv authors 787a8c21a54SThe etnaviv authors return pvec; 788a8c21a54SThe etnaviv authors } 789a8c21a54SThe etnaviv authors 790a8c21a54SThe etnaviv authors static void __etnaviv_gem_userptr_get_pages(struct work_struct *_work) 791a8c21a54SThe etnaviv authors { 792a8c21a54SThe etnaviv authors struct get_pages_work *work = container_of(_work, typeof(*work), work); 793a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = work->etnaviv_obj; 794a8c21a54SThe etnaviv authors struct page **pvec; 795a8c21a54SThe etnaviv authors 796a8c21a54SThe etnaviv authors pvec = etnaviv_gem_userptr_do_get_pages(etnaviv_obj, work->mm, work->task); 797a8c21a54SThe etnaviv authors 798a8c21a54SThe etnaviv authors mutex_lock(&etnaviv_obj->lock); 799a8c21a54SThe etnaviv authors if (IS_ERR(pvec)) { 800a8c21a54SThe etnaviv authors etnaviv_obj->userptr.work = ERR_CAST(pvec); 801a8c21a54SThe etnaviv authors } else { 802a8c21a54SThe etnaviv authors etnaviv_obj->userptr.work = NULL; 803a8c21a54SThe etnaviv authors etnaviv_obj->pages = pvec; 804a8c21a54SThe etnaviv authors } 805a8c21a54SThe etnaviv authors 806a8c21a54SThe etnaviv authors mutex_unlock(&etnaviv_obj->lock); 80723d1dd03SCihangir Akturk drm_gem_object_put_unlocked(&etnaviv_obj->base); 808a8c21a54SThe etnaviv authors 809a8c21a54SThe etnaviv authors mmput(work->mm); 810a8c21a54SThe etnaviv authors put_task_struct(work->task); 811a8c21a54SThe etnaviv authors kfree(work); 812a8c21a54SThe etnaviv authors } 813a8c21a54SThe etnaviv authors 814a8c21a54SThe etnaviv authors static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) 815a8c21a54SThe etnaviv authors { 816a8c21a54SThe etnaviv authors struct page **pvec = NULL; 817a8c21a54SThe etnaviv authors struct get_pages_work *work; 818a8c21a54SThe etnaviv authors struct mm_struct *mm; 819a8c21a54SThe etnaviv authors int ret, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT; 820a8c21a54SThe etnaviv authors 821a8c21a54SThe etnaviv authors if (etnaviv_obj->userptr.work) { 822a8c21a54SThe etnaviv authors if (IS_ERR(etnaviv_obj->userptr.work)) { 823a8c21a54SThe etnaviv authors ret = PTR_ERR(etnaviv_obj->userptr.work); 824a8c21a54SThe etnaviv authors etnaviv_obj->userptr.work = NULL; 825a8c21a54SThe etnaviv authors } else { 826a8c21a54SThe etnaviv authors ret = -EAGAIN; 827a8c21a54SThe etnaviv authors } 828a8c21a54SThe etnaviv authors return ret; 829a8c21a54SThe etnaviv authors } 830a8c21a54SThe etnaviv authors 831a8c21a54SThe etnaviv authors mm = get_task_mm(etnaviv_obj->userptr.task); 832a8c21a54SThe etnaviv authors pinned = 0; 833a8c21a54SThe etnaviv authors if (mm == current->mm) { 8342098105eSMichal Hocko pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 835a8c21a54SThe etnaviv authors if (!pvec) { 836a8c21a54SThe etnaviv authors mmput(mm); 837a8c21a54SThe etnaviv authors return -ENOMEM; 838a8c21a54SThe etnaviv authors } 839a8c21a54SThe etnaviv authors 840a8c21a54SThe etnaviv authors pinned = __get_user_pages_fast(etnaviv_obj->userptr.ptr, npages, 841a8c21a54SThe etnaviv authors !etnaviv_obj->userptr.ro, pvec); 842a8c21a54SThe etnaviv authors if (pinned < 0) { 8432098105eSMichal Hocko kvfree(pvec); 844a8c21a54SThe etnaviv authors mmput(mm); 845a8c21a54SThe etnaviv authors return pinned; 846a8c21a54SThe etnaviv authors } 847a8c21a54SThe etnaviv authors 848a8c21a54SThe etnaviv authors if (pinned == npages) { 849a8c21a54SThe etnaviv authors etnaviv_obj->pages = pvec; 850a8c21a54SThe etnaviv authors mmput(mm); 851a8c21a54SThe etnaviv authors return 0; 852a8c21a54SThe etnaviv authors } 853a8c21a54SThe etnaviv authors } 854a8c21a54SThe etnaviv authors 855c6f92f9fSMel Gorman release_pages(pvec, pinned); 8562098105eSMichal Hocko kvfree(pvec); 857a8c21a54SThe etnaviv authors 858a8c21a54SThe etnaviv authors work = kmalloc(sizeof(*work), GFP_KERNEL); 859a8c21a54SThe etnaviv authors if (!work) { 860a8c21a54SThe etnaviv authors mmput(mm); 861a8c21a54SThe etnaviv authors return -ENOMEM; 862a8c21a54SThe etnaviv authors } 863a8c21a54SThe etnaviv authors 864a8c21a54SThe etnaviv authors get_task_struct(current); 86523d1dd03SCihangir Akturk drm_gem_object_get(&etnaviv_obj->base); 866a8c21a54SThe etnaviv authors 867a8c21a54SThe etnaviv authors work->mm = mm; 868a8c21a54SThe etnaviv authors work->task = current; 869a8c21a54SThe etnaviv authors work->etnaviv_obj = etnaviv_obj; 870a8c21a54SThe etnaviv authors 871a8c21a54SThe etnaviv authors etnaviv_obj->userptr.work = &work->work; 872a8c21a54SThe etnaviv authors INIT_WORK(&work->work, __etnaviv_gem_userptr_get_pages); 873a8c21a54SThe etnaviv authors 874a8c21a54SThe etnaviv authors etnaviv_queue_work(etnaviv_obj->base.dev, &work->work); 875a8c21a54SThe etnaviv authors 876a8c21a54SThe etnaviv authors return -EAGAIN; 877a8c21a54SThe etnaviv authors } 878a8c21a54SThe etnaviv authors 879a8c21a54SThe etnaviv authors static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) 880a8c21a54SThe etnaviv authors { 881a8c21a54SThe etnaviv authors if (etnaviv_obj->sgt) { 882a8c21a54SThe etnaviv authors etnaviv_gem_scatterlist_unmap(etnaviv_obj); 883a8c21a54SThe etnaviv authors sg_free_table(etnaviv_obj->sgt); 884a8c21a54SThe etnaviv authors kfree(etnaviv_obj->sgt); 885a8c21a54SThe etnaviv authors } 886a8c21a54SThe etnaviv authors if (etnaviv_obj->pages) { 887a8c21a54SThe etnaviv authors int npages = etnaviv_obj->base.size >> PAGE_SHIFT; 888a8c21a54SThe etnaviv authors 889c6f92f9fSMel Gorman release_pages(etnaviv_obj->pages, npages); 8902098105eSMichal Hocko kvfree(etnaviv_obj->pages); 891a8c21a54SThe etnaviv authors } 892a8c21a54SThe etnaviv authors put_task_struct(etnaviv_obj->userptr.task); 893a8c21a54SThe etnaviv authors } 894a8c21a54SThe etnaviv authors 895a10e2bdeSLucas Stach static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, 896a10e2bdeSLucas Stach struct vm_area_struct *vma) 897a10e2bdeSLucas Stach { 898a10e2bdeSLucas Stach return -EINVAL; 899a10e2bdeSLucas Stach } 900a10e2bdeSLucas Stach 901a8c21a54SThe etnaviv authors static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { 902a8c21a54SThe etnaviv authors .get_pages = etnaviv_gem_userptr_get_pages, 903a8c21a54SThe etnaviv authors .release = etnaviv_gem_userptr_release, 904a0a5ab3eSLucas Stach .vmap = etnaviv_gem_vmap_impl, 905a10e2bdeSLucas Stach .mmap = etnaviv_gem_userptr_mmap_obj, 906a8c21a54SThe etnaviv authors }; 907a8c21a54SThe etnaviv authors 908a8c21a54SThe etnaviv authors int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, 909a8c21a54SThe etnaviv authors uintptr_t ptr, u32 size, u32 flags, u32 *handle) 910a8c21a54SThe etnaviv authors { 911a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj; 912a8c21a54SThe etnaviv authors int ret; 913a8c21a54SThe etnaviv authors 914a8c21a54SThe etnaviv authors ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, NULL, 915a8c21a54SThe etnaviv authors &etnaviv_gem_userptr_ops, &etnaviv_obj); 916a8c21a54SThe etnaviv authors if (ret) 917a8c21a54SThe etnaviv authors return ret; 918a8c21a54SThe etnaviv authors 919a8c21a54SThe etnaviv authors etnaviv_obj->userptr.ptr = ptr; 920a8c21a54SThe etnaviv authors etnaviv_obj->userptr.task = current; 921a8c21a54SThe etnaviv authors etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); 922a8c21a54SThe etnaviv authors get_task_struct(current); 923a8c21a54SThe etnaviv authors 924a8c21a54SThe etnaviv authors ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base); 925d9a7ed77SMarkus Elfring if (ret) 926d9a7ed77SMarkus Elfring goto unreference; 927a8c21a54SThe etnaviv authors 928a8c21a54SThe etnaviv authors ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); 929d9a7ed77SMarkus Elfring unreference: 930a8c21a54SThe etnaviv authors /* drop reference from allocate - handle holds it now */ 93123d1dd03SCihangir Akturk drm_gem_object_put_unlocked(&etnaviv_obj->base); 932a8c21a54SThe etnaviv authors return ret; 933a8c21a54SThe etnaviv authors } 934