1f6ffbd4fSLucas Stach // SPDX-License-Identifier: GPL-2.0 2a8c21a54SThe etnaviv authors /* 3f6ffbd4fSLucas Stach * Copyright (C) 2015-2018 Etnaviv Project 4a8c21a54SThe etnaviv authors */ 5a8c21a54SThe etnaviv authors 66eae41feSSam Ravnborg #include <drm/drm_prime.h> 76eae41feSSam Ravnborg #include <linux/dma-mapping.h> 8a8c21a54SThe etnaviv authors #include <linux/shmem_fs.h> 96eae41feSSam Ravnborg #include <linux/spinlock.h> 106eae41feSSam Ravnborg #include <linux/vmalloc.h> 11a8c21a54SThe etnaviv authors 12a8c21a54SThe etnaviv authors #include "etnaviv_drv.h" 13a8c21a54SThe etnaviv authors #include "etnaviv_gem.h" 14a8c21a54SThe etnaviv authors #include "etnaviv_gpu.h" 15a8c21a54SThe etnaviv authors #include "etnaviv_mmu.h" 16a8c21a54SThe etnaviv authors 17d6a8743dSLucas Stach static struct lock_class_key etnaviv_shm_lock_class; 18d6a8743dSLucas Stach static struct lock_class_key etnaviv_userptr_lock_class; 19d6a8743dSLucas Stach 20a8c21a54SThe etnaviv authors static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj) 21a8c21a54SThe etnaviv authors { 22a8c21a54SThe etnaviv authors struct drm_device *dev = etnaviv_obj->base.dev; 23a8c21a54SThe etnaviv authors struct sg_table *sgt = etnaviv_obj->sgt; 24a8c21a54SThe etnaviv authors 25a8c21a54SThe etnaviv authors /* 26a8c21a54SThe etnaviv authors * For non-cached buffers, ensure the new pages are clean 27a8c21a54SThe etnaviv authors * because display controller, GPU, etc. are not coherent. 28a8c21a54SThe etnaviv authors */ 29a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) 30182354a5SMarek Szyprowski dma_map_sgtable(dev->dev, sgt, DMA_BIDIRECTIONAL, 0); 31a8c21a54SThe etnaviv authors } 32a8c21a54SThe etnaviv authors 33a8c21a54SThe etnaviv authors static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj) 34a8c21a54SThe etnaviv authors { 35a8c21a54SThe etnaviv authors struct drm_device *dev = etnaviv_obj->base.dev; 36a8c21a54SThe etnaviv authors struct sg_table *sgt = etnaviv_obj->sgt; 37a8c21a54SThe etnaviv authors 38a8c21a54SThe etnaviv authors /* 39a8c21a54SThe etnaviv authors * For non-cached buffers, ensure the new pages are clean 40a8c21a54SThe etnaviv authors * because display controller, GPU, etc. are not coherent: 41a8c21a54SThe etnaviv authors * 42a8c21a54SThe etnaviv authors * WARNING: The DMA API does not support concurrent CPU 43a8c21a54SThe etnaviv authors * and device access to the memory area. With BIDIRECTIONAL, 44a8c21a54SThe etnaviv authors * we will clean the cache lines which overlap the region, 45a8c21a54SThe etnaviv authors * and invalidate all cache lines (partially) contained in 46a8c21a54SThe etnaviv authors * the region. 47a8c21a54SThe etnaviv authors * 48a8c21a54SThe etnaviv authors * If you have dirty data in the overlapping cache lines, 49a8c21a54SThe etnaviv authors * that will corrupt the GPU-written data. If you have 50a8c21a54SThe etnaviv authors * written into the remainder of the region, this can 51a8c21a54SThe etnaviv authors * discard those writes. 52a8c21a54SThe etnaviv authors */ 53a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) 54182354a5SMarek Szyprowski dma_unmap_sgtable(dev->dev, sgt, DMA_BIDIRECTIONAL, 0); 55a8c21a54SThe etnaviv authors } 56a8c21a54SThe etnaviv authors 57a8c21a54SThe etnaviv authors /* called with etnaviv_obj->lock held */ 58a8c21a54SThe etnaviv authors static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj) 59a8c21a54SThe etnaviv authors { 60a8c21a54SThe etnaviv authors struct drm_device *dev = etnaviv_obj->base.dev; 61a8c21a54SThe etnaviv authors struct page **p = drm_gem_get_pages(&etnaviv_obj->base); 62a8c21a54SThe etnaviv authors 63a8c21a54SThe etnaviv authors if (IS_ERR(p)) { 64f91ac470SLucas Stach dev_dbg(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); 65a8c21a54SThe etnaviv authors return PTR_ERR(p); 66a8c21a54SThe etnaviv authors } 67a8c21a54SThe etnaviv authors 68a8c21a54SThe etnaviv authors etnaviv_obj->pages = p; 69a8c21a54SThe etnaviv authors 70a8c21a54SThe etnaviv authors return 0; 71a8c21a54SThe etnaviv authors } 72a8c21a54SThe etnaviv authors 73a8c21a54SThe etnaviv authors static void put_pages(struct etnaviv_gem_object *etnaviv_obj) 74a8c21a54SThe etnaviv authors { 75a8c21a54SThe etnaviv authors if (etnaviv_obj->sgt) { 76a8c21a54SThe etnaviv authors etnaviv_gem_scatterlist_unmap(etnaviv_obj); 77a8c21a54SThe etnaviv authors sg_free_table(etnaviv_obj->sgt); 78a8c21a54SThe etnaviv authors kfree(etnaviv_obj->sgt); 79a8c21a54SThe etnaviv authors etnaviv_obj->sgt = NULL; 80a8c21a54SThe etnaviv authors } 81a8c21a54SThe etnaviv authors if (etnaviv_obj->pages) { 82a8c21a54SThe etnaviv authors drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages, 83a8c21a54SThe etnaviv authors true, false); 84a8c21a54SThe etnaviv authors 85a8c21a54SThe etnaviv authors etnaviv_obj->pages = NULL; 86a8c21a54SThe etnaviv authors } 87a8c21a54SThe etnaviv authors } 88a8c21a54SThe etnaviv authors 89a8c21a54SThe etnaviv authors struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) 90a8c21a54SThe etnaviv authors { 91a8c21a54SThe etnaviv authors int ret; 92a8c21a54SThe etnaviv authors 93a8c21a54SThe etnaviv authors lockdep_assert_held(&etnaviv_obj->lock); 94a8c21a54SThe etnaviv authors 95a8c21a54SThe etnaviv authors if (!etnaviv_obj->pages) { 96a8c21a54SThe etnaviv authors ret = etnaviv_obj->ops->get_pages(etnaviv_obj); 97a8c21a54SThe etnaviv authors if (ret < 0) 98a8c21a54SThe etnaviv authors return ERR_PTR(ret); 99a8c21a54SThe etnaviv authors } 100a8c21a54SThe etnaviv authors 101a8c21a54SThe etnaviv authors if (!etnaviv_obj->sgt) { 102a8c21a54SThe etnaviv authors struct drm_device *dev = etnaviv_obj->base.dev; 103a8c21a54SThe etnaviv authors int npages = etnaviv_obj->base.size >> PAGE_SHIFT; 104a8c21a54SThe etnaviv authors struct sg_table *sgt; 105a8c21a54SThe etnaviv authors 106707d561fSGerd Hoffmann sgt = drm_prime_pages_to_sg(etnaviv_obj->base.dev, 107707d561fSGerd Hoffmann etnaviv_obj->pages, npages); 108a8c21a54SThe etnaviv authors if (IS_ERR(sgt)) { 109a8c21a54SThe etnaviv authors dev_err(dev->dev, "failed to allocate sgt: %ld\n", 110a8c21a54SThe etnaviv authors PTR_ERR(sgt)); 111a8c21a54SThe etnaviv authors return ERR_CAST(sgt); 112a8c21a54SThe etnaviv authors } 113a8c21a54SThe etnaviv authors 114a8c21a54SThe etnaviv authors etnaviv_obj->sgt = sgt; 115a8c21a54SThe etnaviv authors 116a8c21a54SThe etnaviv authors etnaviv_gem_scatter_map(etnaviv_obj); 117a8c21a54SThe etnaviv authors } 118a8c21a54SThe etnaviv authors 119a8c21a54SThe etnaviv authors return etnaviv_obj->pages; 120a8c21a54SThe etnaviv authors } 121a8c21a54SThe etnaviv authors 122a8c21a54SThe etnaviv authors void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj) 123a8c21a54SThe etnaviv authors { 124a8c21a54SThe etnaviv authors lockdep_assert_held(&etnaviv_obj->lock); 125a8c21a54SThe etnaviv authors /* when we start tracking the pin count, then do something here */ 126a8c21a54SThe etnaviv authors } 127a8c21a54SThe etnaviv authors 1280e7f26e6SLucas Stach static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, 129a8c21a54SThe etnaviv authors struct vm_area_struct *vma) 130a8c21a54SThe etnaviv authors { 131a8c21a54SThe etnaviv authors pgprot_t vm_page_prot; 132a8c21a54SThe etnaviv authors 133*81fd23e2SThomas Zimmermann vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP; 134a8c21a54SThe etnaviv authors 135a8c21a54SThe etnaviv authors vm_page_prot = vm_get_page_prot(vma->vm_flags); 136a8c21a54SThe etnaviv authors 137a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_WC) { 138a8c21a54SThe etnaviv authors vma->vm_page_prot = pgprot_writecombine(vm_page_prot); 139a8c21a54SThe etnaviv authors } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) { 140a8c21a54SThe etnaviv authors vma->vm_page_prot = pgprot_noncached(vm_page_prot); 141a8c21a54SThe etnaviv authors } else { 142a8c21a54SThe etnaviv authors /* 143a8c21a54SThe etnaviv authors * Shunt off cached objs to shmem file so they have their own 144a8c21a54SThe etnaviv authors * address_space (so unmap_mapping_range does what we want, 145a8c21a54SThe etnaviv authors * in particular in the case of mmap'd dmabufs) 146a8c21a54SThe etnaviv authors */ 147a8c21a54SThe etnaviv authors vma->vm_pgoff = 0; 148295992fbSChristian König vma_set_file(vma, etnaviv_obj->base.filp); 149a8c21a54SThe etnaviv authors 150a8c21a54SThe etnaviv authors vma->vm_page_prot = vm_page_prot; 151a8c21a54SThe etnaviv authors } 152a8c21a54SThe etnaviv authors 153a8c21a54SThe etnaviv authors return 0; 154a8c21a54SThe etnaviv authors } 155a8c21a54SThe etnaviv authors 156*81fd23e2SThomas Zimmermann static int etnaviv_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) 157a8c21a54SThe etnaviv authors { 158*81fd23e2SThomas Zimmermann struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 159a8c21a54SThe etnaviv authors 160*81fd23e2SThomas Zimmermann return etnaviv_obj->ops->mmap(etnaviv_obj, vma); 161a8c21a54SThe etnaviv authors } 162a8c21a54SThe etnaviv authors 163a7730627SThomas Zimmermann static vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf) 164a8c21a54SThe etnaviv authors { 16511bac800SDave Jiang struct vm_area_struct *vma = vmf->vma; 166a8c21a54SThe etnaviv authors struct drm_gem_object *obj = vma->vm_private_data; 167a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 168a8c21a54SThe etnaviv authors struct page **pages, *page; 169a8c21a54SThe etnaviv authors pgoff_t pgoff; 170cfad05a2SSouptick Joarder int err; 171a8c21a54SThe etnaviv authors 172a8c21a54SThe etnaviv authors /* 173a8c21a54SThe etnaviv authors * Make sure we don't parallel update on a fault, nor move or remove 174cfad05a2SSouptick Joarder * something from beneath our feet. Note that vmf_insert_page() is 175a8c21a54SThe etnaviv authors * specifically coded to take care of this, so we don't have to. 176a8c21a54SThe etnaviv authors */ 177cfad05a2SSouptick Joarder err = mutex_lock_interruptible(&etnaviv_obj->lock); 178cfad05a2SSouptick Joarder if (err) 179cfad05a2SSouptick Joarder return VM_FAULT_NOPAGE; 180a8c21a54SThe etnaviv authors /* make sure we have pages attached now */ 181a8c21a54SThe etnaviv authors pages = etnaviv_gem_get_pages(etnaviv_obj); 182a8c21a54SThe etnaviv authors mutex_unlock(&etnaviv_obj->lock); 183a8c21a54SThe etnaviv authors 184a8c21a54SThe etnaviv authors if (IS_ERR(pages)) { 185cfad05a2SSouptick Joarder err = PTR_ERR(pages); 186cfad05a2SSouptick Joarder return vmf_error(err); 187a8c21a54SThe etnaviv authors } 188a8c21a54SThe etnaviv authors 189a8c21a54SThe etnaviv authors /* We don't use vmf->pgoff since that has the fake offset: */ 1901a29d85eSJan Kara pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 191a8c21a54SThe etnaviv authors 192a8c21a54SThe etnaviv authors page = pages[pgoff]; 193a8c21a54SThe etnaviv authors 1941a29d85eSJan Kara VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 195a8c21a54SThe etnaviv authors page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT); 196a8c21a54SThe etnaviv authors 197cfad05a2SSouptick Joarder return vmf_insert_page(vma, vmf->address, page); 198a8c21a54SThe etnaviv authors } 199a8c21a54SThe etnaviv authors 200a8c21a54SThe etnaviv authors int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset) 201a8c21a54SThe etnaviv authors { 202a8c21a54SThe etnaviv authors int ret; 203a8c21a54SThe etnaviv authors 204a8c21a54SThe etnaviv authors /* Make it mmapable */ 205a8c21a54SThe etnaviv authors ret = drm_gem_create_mmap_offset(obj); 206a8c21a54SThe etnaviv authors if (ret) 207a8c21a54SThe etnaviv authors dev_err(obj->dev->dev, "could not allocate mmap offset\n"); 208a8c21a54SThe etnaviv authors else 209a8c21a54SThe etnaviv authors *offset = drm_vma_node_offset_addr(&obj->vma_node); 210a8c21a54SThe etnaviv authors 211a8c21a54SThe etnaviv authors return ret; 212a8c21a54SThe etnaviv authors } 213a8c21a54SThe etnaviv authors 214a8c21a54SThe etnaviv authors static struct etnaviv_vram_mapping * 215a8c21a54SThe etnaviv authors etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj, 21627b67278SLucas Stach struct etnaviv_iommu_context *context) 217a8c21a54SThe etnaviv authors { 218a8c21a54SThe etnaviv authors struct etnaviv_vram_mapping *mapping; 219a8c21a54SThe etnaviv authors 220a8c21a54SThe etnaviv authors list_for_each_entry(mapping, &obj->vram_list, obj_node) { 22127b67278SLucas Stach if (mapping->context == context) 222a8c21a54SThe etnaviv authors return mapping; 223a8c21a54SThe etnaviv authors } 224a8c21a54SThe etnaviv authors 225a8c21a54SThe etnaviv authors return NULL; 226a8c21a54SThe etnaviv authors } 227a8c21a54SThe etnaviv authors 228b6325f40SRussell King void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) 229b6325f40SRussell King { 230b6325f40SRussell King struct etnaviv_gem_object *etnaviv_obj = mapping->object; 231b6325f40SRussell King 232b6325f40SRussell King mutex_lock(&etnaviv_obj->lock); 233b6325f40SRussell King WARN_ON(mapping->use == 0); 234b6325f40SRussell King mapping->use -= 1; 235b6325f40SRussell King mutex_unlock(&etnaviv_obj->lock); 236b6325f40SRussell King 2376780bf32SEmil Velikov drm_gem_object_put(&etnaviv_obj->base); 238b6325f40SRussell King } 239b6325f40SRussell King 240b6325f40SRussell King struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( 241088880ddSLucas Stach struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu_context, 242088880ddSLucas Stach u64 va) 243a8c21a54SThe etnaviv authors { 244a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 245a8c21a54SThe etnaviv authors struct etnaviv_vram_mapping *mapping; 246a8c21a54SThe etnaviv authors struct page **pages; 247a8c21a54SThe etnaviv authors int ret = 0; 248a8c21a54SThe etnaviv authors 249a8c21a54SThe etnaviv authors mutex_lock(&etnaviv_obj->lock); 250e6364d70SLucas Stach mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, mmu_context); 251a8c21a54SThe etnaviv authors if (mapping) { 252a8c21a54SThe etnaviv authors /* 253a8c21a54SThe etnaviv authors * Holding the object lock prevents the use count changing 254a8c21a54SThe etnaviv authors * beneath us. If the use count is zero, the MMU might be 255a8c21a54SThe etnaviv authors * reaping this object, so take the lock and re-check that 256a8c21a54SThe etnaviv authors * the MMU owns this mapping to close this race. 257a8c21a54SThe etnaviv authors */ 258a8c21a54SThe etnaviv authors if (mapping->use == 0) { 259e6364d70SLucas Stach mutex_lock(&mmu_context->lock); 260e6364d70SLucas Stach if (mapping->context == mmu_context) 261a8c21a54SThe etnaviv authors mapping->use += 1; 262a8c21a54SThe etnaviv authors else 263a8c21a54SThe etnaviv authors mapping = NULL; 264e6364d70SLucas Stach mutex_unlock(&mmu_context->lock); 265a8c21a54SThe etnaviv authors if (mapping) 266a8c21a54SThe etnaviv authors goto out; 267a8c21a54SThe etnaviv authors } else { 268a8c21a54SThe etnaviv authors mapping->use += 1; 269a8c21a54SThe etnaviv authors goto out; 270a8c21a54SThe etnaviv authors } 271a8c21a54SThe etnaviv authors } 272a8c21a54SThe etnaviv authors 273a8c21a54SThe etnaviv authors pages = etnaviv_gem_get_pages(etnaviv_obj); 274a8c21a54SThe etnaviv authors if (IS_ERR(pages)) { 275a8c21a54SThe etnaviv authors ret = PTR_ERR(pages); 276a8c21a54SThe etnaviv authors goto out; 277a8c21a54SThe etnaviv authors } 278a8c21a54SThe etnaviv authors 279a8c21a54SThe etnaviv authors /* 280a8c21a54SThe etnaviv authors * See if we have a reaped vram mapping we can re-use before 281a8c21a54SThe etnaviv authors * allocating a fresh mapping. 282a8c21a54SThe etnaviv authors */ 283a8c21a54SThe etnaviv authors mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL); 284a8c21a54SThe etnaviv authors if (!mapping) { 285a8c21a54SThe etnaviv authors mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); 286ed94add0SDan Carpenter if (!mapping) { 287ed94add0SDan Carpenter ret = -ENOMEM; 288ed94add0SDan Carpenter goto out; 289ed94add0SDan Carpenter } 290a8c21a54SThe etnaviv authors 291a8c21a54SThe etnaviv authors INIT_LIST_HEAD(&mapping->scan_node); 292a8c21a54SThe etnaviv authors mapping->object = etnaviv_obj; 293a8c21a54SThe etnaviv authors } else { 294a8c21a54SThe etnaviv authors list_del(&mapping->obj_node); 295a8c21a54SThe etnaviv authors } 296a8c21a54SThe etnaviv authors 297e6364d70SLucas Stach etnaviv_iommu_context_get(mmu_context); 298e6364d70SLucas Stach mapping->context = mmu_context; 299a8c21a54SThe etnaviv authors mapping->use = 1; 300a8c21a54SThe etnaviv authors 30117e4660aSLucas Stach ret = etnaviv_iommu_map_gem(mmu_context, etnaviv_obj, 30217eae23bSLucas Stach mmu_context->global->memory_base, 303088880ddSLucas Stach mapping, va); 304e6364d70SLucas Stach if (ret < 0) { 305e6364d70SLucas Stach etnaviv_iommu_context_put(mmu_context); 306a8c21a54SThe etnaviv authors kfree(mapping); 307e6364d70SLucas Stach } else { 308a8c21a54SThe etnaviv authors list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list); 309e6364d70SLucas Stach } 310a8c21a54SThe etnaviv authors 311a8c21a54SThe etnaviv authors out: 312a8c21a54SThe etnaviv authors mutex_unlock(&etnaviv_obj->lock); 313a8c21a54SThe etnaviv authors 314b6325f40SRussell King if (ret) 315b6325f40SRussell King return ERR_PTR(ret); 316b6325f40SRussell King 317a8c21a54SThe etnaviv authors /* Take a reference on the object */ 31823d1dd03SCihangir Akturk drm_gem_object_get(obj); 319b6325f40SRussell King return mapping; 320a8c21a54SThe etnaviv authors } 321a8c21a54SThe etnaviv authors 322ce3088fdSLucas Stach void *etnaviv_gem_vmap(struct drm_gem_object *obj) 323a8c21a54SThe etnaviv authors { 324a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 325a8c21a54SThe etnaviv authors 326a0a5ab3eSLucas Stach if (etnaviv_obj->vaddr) 327a0a5ab3eSLucas Stach return etnaviv_obj->vaddr; 328a0a5ab3eSLucas Stach 329a8c21a54SThe etnaviv authors mutex_lock(&etnaviv_obj->lock); 330a0a5ab3eSLucas Stach /* 331a0a5ab3eSLucas Stach * Need to check again, as we might have raced with another thread 332a0a5ab3eSLucas Stach * while waiting for the mutex. 333a0a5ab3eSLucas Stach */ 334a0a5ab3eSLucas Stach if (!etnaviv_obj->vaddr) 335a0a5ab3eSLucas Stach etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj); 336a8c21a54SThe etnaviv authors mutex_unlock(&etnaviv_obj->lock); 337a8c21a54SThe etnaviv authors 338a8c21a54SThe etnaviv authors return etnaviv_obj->vaddr; 339a8c21a54SThe etnaviv authors } 340a8c21a54SThe etnaviv authors 341a0a5ab3eSLucas Stach static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj) 342a0a5ab3eSLucas Stach { 343a0a5ab3eSLucas Stach struct page **pages; 344a0a5ab3eSLucas Stach 345a0a5ab3eSLucas Stach lockdep_assert_held(&obj->lock); 346a0a5ab3eSLucas Stach 347a0a5ab3eSLucas Stach pages = etnaviv_gem_get_pages(obj); 348a0a5ab3eSLucas Stach if (IS_ERR(pages)) 349a0a5ab3eSLucas Stach return NULL; 350a0a5ab3eSLucas Stach 351a0a5ab3eSLucas Stach return vmap(pages, obj->base.size >> PAGE_SHIFT, 352a0a5ab3eSLucas Stach VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 353a0a5ab3eSLucas Stach } 354a0a5ab3eSLucas Stach 355a8c21a54SThe etnaviv authors static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) 356a8c21a54SThe etnaviv authors { 357a8c21a54SThe etnaviv authors if (op & ETNA_PREP_READ) 358a8c21a54SThe etnaviv authors return DMA_FROM_DEVICE; 359a8c21a54SThe etnaviv authors else if (op & ETNA_PREP_WRITE) 360a8c21a54SThe etnaviv authors return DMA_TO_DEVICE; 361a8c21a54SThe etnaviv authors else 362a8c21a54SThe etnaviv authors return DMA_BIDIRECTIONAL; 363a8c21a54SThe etnaviv authors } 364a8c21a54SThe etnaviv authors 365a8c21a54SThe etnaviv authors int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, 36638c4a4cfSArnd Bergmann struct drm_etnaviv_timespec *timeout) 367a8c21a54SThe etnaviv authors { 368a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 369a8c21a54SThe etnaviv authors struct drm_device *dev = obj->dev; 370a8c21a54SThe etnaviv authors bool write = !!(op & ETNA_PREP_WRITE); 37146a269daSLucas Stach int ret; 372a8c21a54SThe etnaviv authors 3738cc47b3eSLucas Stach if (!etnaviv_obj->sgt) { 3748cc47b3eSLucas Stach void *ret; 3758cc47b3eSLucas Stach 3768cc47b3eSLucas Stach mutex_lock(&etnaviv_obj->lock); 3778cc47b3eSLucas Stach ret = etnaviv_gem_get_pages(etnaviv_obj); 3788cc47b3eSLucas Stach mutex_unlock(&etnaviv_obj->lock); 3798cc47b3eSLucas Stach if (IS_ERR(ret)) 3808cc47b3eSLucas Stach return PTR_ERR(ret); 3818cc47b3eSLucas Stach } 3828cc47b3eSLucas Stach 38346a269daSLucas Stach if (op & ETNA_PREP_NOSYNC) { 384d3fae3b3SChristian König if (!dma_resv_test_signaled(obj->resv, write)) 38546a269daSLucas Stach return -EBUSY; 38646a269daSLucas Stach } else { 38746a269daSLucas Stach unsigned long remain = etnaviv_timeout_to_jiffies(timeout); 38846a269daSLucas Stach 389d3fae3b3SChristian König ret = dma_resv_wait_timeout(obj->resv, write, true, remain); 39046a269daSLucas Stach if (ret <= 0) 39146a269daSLucas Stach return ret == 0 ? -ETIMEDOUT : ret; 39246a269daSLucas Stach } 393a8c21a54SThe etnaviv authors 394a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_CACHED) { 395182354a5SMarek Szyprowski dma_sync_sgtable_for_cpu(dev->dev, etnaviv_obj->sgt, 396a8c21a54SThe etnaviv authors etnaviv_op_to_dma_dir(op)); 397a8c21a54SThe etnaviv authors etnaviv_obj->last_cpu_prep_op = op; 398a8c21a54SThe etnaviv authors } 399a8c21a54SThe etnaviv authors 400a8c21a54SThe etnaviv authors return 0; 401a8c21a54SThe etnaviv authors } 402a8c21a54SThe etnaviv authors 403a8c21a54SThe etnaviv authors int etnaviv_gem_cpu_fini(struct drm_gem_object *obj) 404a8c21a54SThe etnaviv authors { 405a8c21a54SThe etnaviv authors struct drm_device *dev = obj->dev; 406a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 407a8c21a54SThe etnaviv authors 408a8c21a54SThe etnaviv authors if (etnaviv_obj->flags & ETNA_BO_CACHED) { 409a8c21a54SThe etnaviv authors /* fini without a prep is almost certainly a userspace error */ 410a8c21a54SThe etnaviv authors WARN_ON(etnaviv_obj->last_cpu_prep_op == 0); 411182354a5SMarek Szyprowski dma_sync_sgtable_for_device(dev->dev, etnaviv_obj->sgt, 412a8c21a54SThe etnaviv authors etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op)); 413a8c21a54SThe etnaviv authors etnaviv_obj->last_cpu_prep_op = 0; 414a8c21a54SThe etnaviv authors } 415a8c21a54SThe etnaviv authors 416a8c21a54SThe etnaviv authors return 0; 417a8c21a54SThe etnaviv authors } 418a8c21a54SThe etnaviv authors 419a8c21a54SThe etnaviv authors int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj, 42038c4a4cfSArnd Bergmann struct drm_etnaviv_timespec *timeout) 421a8c21a54SThe etnaviv authors { 422a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 423a8c21a54SThe etnaviv authors 424a8c21a54SThe etnaviv authors return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout); 425a8c21a54SThe etnaviv authors } 426a8c21a54SThe etnaviv authors 427a8c21a54SThe etnaviv authors #ifdef CONFIG_DEBUG_FS 428f54d1867SChris Wilson static void etnaviv_gem_describe_fence(struct dma_fence *fence, 429a8c21a54SThe etnaviv authors const char *type, struct seq_file *m) 430a8c21a54SThe etnaviv authors { 431f54d1867SChris Wilson if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) 4323415701aSChristian König seq_printf(m, "\t%9s: %s %s seq %llu\n", 433a8c21a54SThe etnaviv authors type, 434a8c21a54SThe etnaviv authors fence->ops->get_driver_name(fence), 435a8c21a54SThe etnaviv authors fence->ops->get_timeline_name(fence), 436a8c21a54SThe etnaviv authors fence->seqno); 437a8c21a54SThe etnaviv authors } 438a8c21a54SThe etnaviv authors 439a8c21a54SThe etnaviv authors static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 440a8c21a54SThe etnaviv authors { 441a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 44252791eeeSChristian König struct dma_resv *robj = obj->resv; 44352791eeeSChristian König struct dma_resv_list *fobj; 444f54d1867SChris Wilson struct dma_fence *fence; 445a8c21a54SThe etnaviv authors unsigned long off = drm_vma_node_start(&obj->vma_node); 446a8c21a54SThe etnaviv authors 447a8c21a54SThe etnaviv authors seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n", 448a8c21a54SThe etnaviv authors etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I', 4492c935bc5SPeter Zijlstra obj->name, kref_read(&obj->refcount), 450a8c21a54SThe etnaviv authors off, etnaviv_obj->vaddr, obj->size); 451a8c21a54SThe etnaviv authors 452a8c21a54SThe etnaviv authors rcu_read_lock(); 453fb5ce730SChristian König fobj = dma_resv_shared_list(robj); 454a8c21a54SThe etnaviv authors if (fobj) { 455a8c21a54SThe etnaviv authors unsigned int i, shared_count = fobj->shared_count; 456a8c21a54SThe etnaviv authors 457a8c21a54SThe etnaviv authors for (i = 0; i < shared_count; i++) { 458a8c21a54SThe etnaviv authors fence = rcu_dereference(fobj->shared[i]); 459a8c21a54SThe etnaviv authors etnaviv_gem_describe_fence(fence, "Shared", m); 460a8c21a54SThe etnaviv authors } 461a8c21a54SThe etnaviv authors } 462a8c21a54SThe etnaviv authors 4636edbd6abSChristian König fence = dma_resv_excl_fence(robj); 464a8c21a54SThe etnaviv authors if (fence) 465a8c21a54SThe etnaviv authors etnaviv_gem_describe_fence(fence, "Exclusive", m); 466a8c21a54SThe etnaviv authors rcu_read_unlock(); 467a8c21a54SThe etnaviv authors } 468a8c21a54SThe etnaviv authors 469a8c21a54SThe etnaviv authors void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv, 470a8c21a54SThe etnaviv authors struct seq_file *m) 471a8c21a54SThe etnaviv authors { 472a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj; 473a8c21a54SThe etnaviv authors int count = 0; 474a8c21a54SThe etnaviv authors size_t size = 0; 475a8c21a54SThe etnaviv authors 476a8c21a54SThe etnaviv authors mutex_lock(&priv->gem_lock); 477a8c21a54SThe etnaviv authors list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) { 478a8c21a54SThe etnaviv authors struct drm_gem_object *obj = &etnaviv_obj->base; 479a8c21a54SThe etnaviv authors 480a8c21a54SThe etnaviv authors seq_puts(m, " "); 481a8c21a54SThe etnaviv authors etnaviv_gem_describe(obj, m); 482a8c21a54SThe etnaviv authors count++; 483a8c21a54SThe etnaviv authors size += obj->size; 484a8c21a54SThe etnaviv authors } 485a8c21a54SThe etnaviv authors mutex_unlock(&priv->gem_lock); 486a8c21a54SThe etnaviv authors 487a8c21a54SThe etnaviv authors seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 488a8c21a54SThe etnaviv authors } 489a8c21a54SThe etnaviv authors #endif 490a8c21a54SThe etnaviv authors 491a8c21a54SThe etnaviv authors static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj) 492a8c21a54SThe etnaviv authors { 493a8c21a54SThe etnaviv authors vunmap(etnaviv_obj->vaddr); 494a8c21a54SThe etnaviv authors put_pages(etnaviv_obj); 495a8c21a54SThe etnaviv authors } 496a8c21a54SThe etnaviv authors 497a8c21a54SThe etnaviv authors static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { 498a8c21a54SThe etnaviv authors .get_pages = etnaviv_gem_shmem_get_pages, 499a8c21a54SThe etnaviv authors .release = etnaviv_gem_shmem_release, 500a0a5ab3eSLucas Stach .vmap = etnaviv_gem_vmap_impl, 501a10e2bdeSLucas Stach .mmap = etnaviv_gem_mmap_obj, 502a8c21a54SThe etnaviv authors }; 503a8c21a54SThe etnaviv authors 504a8c21a54SThe etnaviv authors void etnaviv_gem_free_object(struct drm_gem_object *obj) 505a8c21a54SThe etnaviv authors { 506a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 50751841752SLucas Stach struct etnaviv_drm_private *priv = obj->dev->dev_private; 508a8c21a54SThe etnaviv authors struct etnaviv_vram_mapping *mapping, *tmp; 509a8c21a54SThe etnaviv authors 510a8c21a54SThe etnaviv authors /* object should not be active */ 511a8c21a54SThe etnaviv authors WARN_ON(is_active(etnaviv_obj)); 512a8c21a54SThe etnaviv authors 51351841752SLucas Stach mutex_lock(&priv->gem_lock); 514a8c21a54SThe etnaviv authors list_del(&etnaviv_obj->gem_node); 51551841752SLucas Stach mutex_unlock(&priv->gem_lock); 516a8c21a54SThe etnaviv authors 517a8c21a54SThe etnaviv authors list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, 518a8c21a54SThe etnaviv authors obj_node) { 51927b67278SLucas Stach struct etnaviv_iommu_context *context = mapping->context; 520a8c21a54SThe etnaviv authors 521a8c21a54SThe etnaviv authors WARN_ON(mapping->use); 522a8c21a54SThe etnaviv authors 523e6364d70SLucas Stach if (context) { 52427b67278SLucas Stach etnaviv_iommu_unmap_gem(context, mapping); 525e6364d70SLucas Stach etnaviv_iommu_context_put(context); 526e6364d70SLucas Stach } 527a8c21a54SThe etnaviv authors 528a8c21a54SThe etnaviv authors list_del(&mapping->obj_node); 529a8c21a54SThe etnaviv authors kfree(mapping); 530a8c21a54SThe etnaviv authors } 531a8c21a54SThe etnaviv authors 532a8c21a54SThe etnaviv authors drm_gem_free_mmap_offset(obj); 533a8c21a54SThe etnaviv authors etnaviv_obj->ops->release(etnaviv_obj); 534a8c21a54SThe etnaviv authors drm_gem_object_release(obj); 535a8c21a54SThe etnaviv authors 536a8c21a54SThe etnaviv authors kfree(etnaviv_obj); 537a8c21a54SThe etnaviv authors } 538a8c21a54SThe etnaviv authors 53954f09288SLucas Stach void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) 540a8c21a54SThe etnaviv authors { 541a8c21a54SThe etnaviv authors struct etnaviv_drm_private *priv = dev->dev_private; 542a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); 543a8c21a54SThe etnaviv authors 544a8c21a54SThe etnaviv authors mutex_lock(&priv->gem_lock); 545a8c21a54SThe etnaviv authors list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); 546a8c21a54SThe etnaviv authors mutex_unlock(&priv->gem_lock); 547a8c21a54SThe etnaviv authors } 548a8c21a54SThe etnaviv authors 549a7730627SThomas Zimmermann static const struct vm_operations_struct vm_ops = { 550a7730627SThomas Zimmermann .fault = etnaviv_gem_fault, 551a7730627SThomas Zimmermann .open = drm_gem_vm_open, 552a7730627SThomas Zimmermann .close = drm_gem_vm_close, 553a7730627SThomas Zimmermann }; 554a7730627SThomas Zimmermann 555a7730627SThomas Zimmermann static const struct drm_gem_object_funcs etnaviv_gem_object_funcs = { 556a7730627SThomas Zimmermann .free = etnaviv_gem_free_object, 557a7730627SThomas Zimmermann .pin = etnaviv_gem_prime_pin, 558a7730627SThomas Zimmermann .unpin = etnaviv_gem_prime_unpin, 559a7730627SThomas Zimmermann .get_sg_table = etnaviv_gem_prime_get_sg_table, 560a7730627SThomas Zimmermann .vmap = etnaviv_gem_prime_vmap, 561*81fd23e2SThomas Zimmermann .mmap = etnaviv_gem_mmap, 562a7730627SThomas Zimmermann .vm_ops = &vm_ops, 563a7730627SThomas Zimmermann }; 564a7730627SThomas Zimmermann 565a8c21a54SThe etnaviv authors static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, 566c6be8086SDaniel Vetter const struct etnaviv_gem_ops *ops, struct drm_gem_object **obj) 567a8c21a54SThe etnaviv authors { 568a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj; 569a8c21a54SThe etnaviv authors unsigned sz = sizeof(*etnaviv_obj); 570a8c21a54SThe etnaviv authors bool valid = true; 571a8c21a54SThe etnaviv authors 572a8c21a54SThe etnaviv authors /* validate flags */ 573a8c21a54SThe etnaviv authors switch (flags & ETNA_BO_CACHE_MASK) { 574a8c21a54SThe etnaviv authors case ETNA_BO_UNCACHED: 575a8c21a54SThe etnaviv authors case ETNA_BO_CACHED: 576a8c21a54SThe etnaviv authors case ETNA_BO_WC: 577a8c21a54SThe etnaviv authors break; 578a8c21a54SThe etnaviv authors default: 579a8c21a54SThe etnaviv authors valid = false; 580a8c21a54SThe etnaviv authors } 581a8c21a54SThe etnaviv authors 582a8c21a54SThe etnaviv authors if (!valid) { 583a8c21a54SThe etnaviv authors dev_err(dev->dev, "invalid cache flag: %x\n", 584a8c21a54SThe etnaviv authors (flags & ETNA_BO_CACHE_MASK)); 585a8c21a54SThe etnaviv authors return -EINVAL; 586a8c21a54SThe etnaviv authors } 587a8c21a54SThe etnaviv authors 588a8c21a54SThe etnaviv authors etnaviv_obj = kzalloc(sz, GFP_KERNEL); 589a8c21a54SThe etnaviv authors if (!etnaviv_obj) 590a8c21a54SThe etnaviv authors return -ENOMEM; 591a8c21a54SThe etnaviv authors 592a8c21a54SThe etnaviv authors etnaviv_obj->flags = flags; 593a8c21a54SThe etnaviv authors etnaviv_obj->ops = ops; 594a8c21a54SThe etnaviv authors 595a8c21a54SThe etnaviv authors mutex_init(&etnaviv_obj->lock); 596a8c21a54SThe etnaviv authors INIT_LIST_HEAD(&etnaviv_obj->vram_list); 597a8c21a54SThe etnaviv authors 598a8c21a54SThe etnaviv authors *obj = &etnaviv_obj->base; 599a7730627SThomas Zimmermann (*obj)->funcs = &etnaviv_gem_object_funcs; 600a8c21a54SThe etnaviv authors 601a8c21a54SThe etnaviv authors return 0; 602a8c21a54SThe etnaviv authors } 603a8c21a54SThe etnaviv authors 604cdd32563SLucas Stach /* convenience method to construct a GEM buffer object, and userspace handle */ 605cdd32563SLucas Stach int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, 606cdd32563SLucas Stach u32 size, u32 flags, u32 *handle) 607a8c21a54SThe etnaviv authors { 608b72af445SLucas Stach struct etnaviv_drm_private *priv = dev->dev_private; 609a8c21a54SThe etnaviv authors struct drm_gem_object *obj = NULL; 610a8c21a54SThe etnaviv authors int ret; 611a8c21a54SThe etnaviv authors 612a8c21a54SThe etnaviv authors size = PAGE_ALIGN(size); 613a8c21a54SThe etnaviv authors 614c6be8086SDaniel Vetter ret = etnaviv_gem_new_impl(dev, size, flags, 615a8c21a54SThe etnaviv authors &etnaviv_gem_shmem_ops, &obj); 616a8c21a54SThe etnaviv authors if (ret) 617a8c21a54SThe etnaviv authors goto fail; 618a8c21a54SThe etnaviv authors 619d6a8743dSLucas Stach lockdep_set_class(&to_etnaviv_bo(obj)->lock, &etnaviv_shm_lock_class); 620d6a8743dSLucas Stach 621a8c21a54SThe etnaviv authors ret = drm_gem_object_init(dev, obj, size); 622a8c21a54SThe etnaviv authors if (ret) 623a8c21a54SThe etnaviv authors goto fail; 624a8c21a54SThe etnaviv authors 625fd2450a7SLucas Stach /* 626fd2450a7SLucas Stach * Our buffers are kept pinned, so allocating them from the MOVABLE 627fd2450a7SLucas Stach * zone is a really bad idea, and conflicts with CMA. See comments 628fd2450a7SLucas Stach * above new_inode() why this is required _and_ expected if you're 629fd2450a7SLucas Stach * going to pin these pages. 630fd2450a7SLucas Stach */ 631b72af445SLucas Stach mapping_set_gfp_mask(obj->filp->f_mapping, priv->shm_gfp_mask); 632fd2450a7SLucas Stach 63354f09288SLucas Stach etnaviv_gem_obj_add(dev, obj); 634a8c21a54SThe etnaviv authors 635a8c21a54SThe etnaviv authors ret = drm_gem_handle_create(file, obj, handle); 636a8c21a54SThe etnaviv authors 637a8c21a54SThe etnaviv authors /* drop reference from allocate - handle holds it now */ 638cdd32563SLucas Stach fail: 6396780bf32SEmil Velikov drm_gem_object_put(obj); 640a8c21a54SThe etnaviv authors 641a8c21a54SThe etnaviv authors return ret; 642a8c21a54SThe etnaviv authors } 643a8c21a54SThe etnaviv authors 644a8c21a54SThe etnaviv authors int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, 645c6be8086SDaniel Vetter const struct etnaviv_gem_ops *ops, struct etnaviv_gem_object **res) 646a8c21a54SThe etnaviv authors { 647a8c21a54SThe etnaviv authors struct drm_gem_object *obj; 648a8c21a54SThe etnaviv authors int ret; 649a8c21a54SThe etnaviv authors 650c6be8086SDaniel Vetter ret = etnaviv_gem_new_impl(dev, size, flags, ops, &obj); 651a8c21a54SThe etnaviv authors if (ret) 652a8c21a54SThe etnaviv authors return ret; 653a8c21a54SThe etnaviv authors 654a8c21a54SThe etnaviv authors drm_gem_private_object_init(dev, obj, size); 655a8c21a54SThe etnaviv authors 656a8c21a54SThe etnaviv authors *res = to_etnaviv_bo(obj); 657a8c21a54SThe etnaviv authors 658a8c21a54SThe etnaviv authors return 0; 659a8c21a54SThe etnaviv authors } 660a8c21a54SThe etnaviv authors 661a8c21a54SThe etnaviv authors static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) 662a8c21a54SThe etnaviv authors { 663a8c21a54SThe etnaviv authors struct page **pvec = NULL; 664b2295c24SLucas Stach struct etnaviv_gem_userptr *userptr = &etnaviv_obj->userptr; 665b2295c24SLucas Stach int ret, pinned = 0, npages = etnaviv_obj->base.size >> PAGE_SHIFT; 666a8c21a54SThe etnaviv authors 667da1c55f1SMichel Lespinasse might_lock_read(¤t->mm->mmap_lock); 668783c06cbSLucas Stach 669b2295c24SLucas Stach if (userptr->mm != current->mm) 670b2295c24SLucas Stach return -EPERM; 671b2295c24SLucas Stach 672b2295c24SLucas Stach pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 673b2295c24SLucas Stach if (!pvec) 674b2295c24SLucas Stach return -ENOMEM; 675b2295c24SLucas Stach 676b2295c24SLucas Stach do { 677b2295c24SLucas Stach unsigned num_pages = npages - pinned; 678b2295c24SLucas Stach uint64_t ptr = userptr->ptr + pinned * PAGE_SIZE; 679b2295c24SLucas Stach struct page **pages = pvec + pinned; 680b2295c24SLucas Stach 68186824e60SJohn Hubbard ret = pin_user_pages_fast(ptr, num_pages, 68250891beaSDaniel Vetter FOLL_WRITE | FOLL_FORCE | FOLL_LONGTERM, 68350891beaSDaniel Vetter pages); 684b2295c24SLucas Stach if (ret < 0) { 68586824e60SJohn Hubbard unpin_user_pages(pvec, pinned); 686b2295c24SLucas Stach kvfree(pvec); 687a8c21a54SThe etnaviv authors return ret; 688a8c21a54SThe etnaviv authors } 689a8c21a54SThe etnaviv authors 690b2295c24SLucas Stach pinned += ret; 691a8c21a54SThe etnaviv authors 692b2295c24SLucas Stach } while (pinned < npages); 693a8c21a54SThe etnaviv authors 694a8c21a54SThe etnaviv authors etnaviv_obj->pages = pvec; 695b2295c24SLucas Stach 696a8c21a54SThe etnaviv authors return 0; 697a8c21a54SThe etnaviv authors } 698a8c21a54SThe etnaviv authors 699a8c21a54SThe etnaviv authors static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) 700a8c21a54SThe etnaviv authors { 701a8c21a54SThe etnaviv authors if (etnaviv_obj->sgt) { 702a8c21a54SThe etnaviv authors etnaviv_gem_scatterlist_unmap(etnaviv_obj); 703a8c21a54SThe etnaviv authors sg_free_table(etnaviv_obj->sgt); 704a8c21a54SThe etnaviv authors kfree(etnaviv_obj->sgt); 705a8c21a54SThe etnaviv authors } 706a8c21a54SThe etnaviv authors if (etnaviv_obj->pages) { 707a8c21a54SThe etnaviv authors int npages = etnaviv_obj->base.size >> PAGE_SHIFT; 708a8c21a54SThe etnaviv authors 70986824e60SJohn Hubbard unpin_user_pages(etnaviv_obj->pages, npages); 7102098105eSMichal Hocko kvfree(etnaviv_obj->pages); 711a8c21a54SThe etnaviv authors } 712a8c21a54SThe etnaviv authors } 713a8c21a54SThe etnaviv authors 714a10e2bdeSLucas Stach static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, 715a10e2bdeSLucas Stach struct vm_area_struct *vma) 716a10e2bdeSLucas Stach { 717a10e2bdeSLucas Stach return -EINVAL; 718a10e2bdeSLucas Stach } 719a10e2bdeSLucas Stach 720a8c21a54SThe etnaviv authors static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { 721a8c21a54SThe etnaviv authors .get_pages = etnaviv_gem_userptr_get_pages, 722a8c21a54SThe etnaviv authors .release = etnaviv_gem_userptr_release, 723a0a5ab3eSLucas Stach .vmap = etnaviv_gem_vmap_impl, 724a10e2bdeSLucas Stach .mmap = etnaviv_gem_userptr_mmap_obj, 725a8c21a54SThe etnaviv authors }; 726a8c21a54SThe etnaviv authors 727a8c21a54SThe etnaviv authors int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, 728a8c21a54SThe etnaviv authors uintptr_t ptr, u32 size, u32 flags, u32 *handle) 729a8c21a54SThe etnaviv authors { 730a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj; 731a8c21a54SThe etnaviv authors int ret; 732a8c21a54SThe etnaviv authors 733c6be8086SDaniel Vetter ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, 734a8c21a54SThe etnaviv authors &etnaviv_gem_userptr_ops, &etnaviv_obj); 735a8c21a54SThe etnaviv authors if (ret) 736a8c21a54SThe etnaviv authors return ret; 737a8c21a54SThe etnaviv authors 738d6a8743dSLucas Stach lockdep_set_class(&etnaviv_obj->lock, &etnaviv_userptr_lock_class); 739d6a8743dSLucas Stach 740a8c21a54SThe etnaviv authors etnaviv_obj->userptr.ptr = ptr; 741b2295c24SLucas Stach etnaviv_obj->userptr.mm = current->mm; 742a8c21a54SThe etnaviv authors etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); 743a8c21a54SThe etnaviv authors 74454f09288SLucas Stach etnaviv_gem_obj_add(dev, &etnaviv_obj->base); 745a8c21a54SThe etnaviv authors 746a8c21a54SThe etnaviv authors ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); 74754f09288SLucas Stach 748a8c21a54SThe etnaviv authors /* drop reference from allocate - handle holds it now */ 7496780bf32SEmil Velikov drm_gem_object_put(&etnaviv_obj->base); 750a8c21a54SThe etnaviv authors return ret; 751a8c21a54SThe etnaviv authors } 752