1c8afe684SRob Clark /* 2c8afe684SRob Clark * Copyright (C) 2013 Red Hat 3c8afe684SRob Clark * Author: Rob Clark <robdclark@gmail.com> 4c8afe684SRob Clark * 5c8afe684SRob Clark * This program is free software; you can redistribute it and/or modify it 6c8afe684SRob Clark * under the terms of the GNU General Public License version 2 as published by 7c8afe684SRob Clark * the Free Software Foundation. 8c8afe684SRob Clark * 9c8afe684SRob Clark * This program is distributed in the hope that it will be useful, but WITHOUT 10c8afe684SRob Clark * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11c8afe684SRob Clark * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12c8afe684SRob Clark * more details. 13c8afe684SRob Clark * 14c8afe684SRob Clark * You should have received a copy of the GNU General Public License along with 15c8afe684SRob Clark * this program. If not, see <http://www.gnu.org/licenses/>. 16c8afe684SRob Clark */ 17c8afe684SRob Clark 18c8afe684SRob Clark #include <linux/spinlock.h> 19c8afe684SRob Clark #include <linux/shmem_fs.h> 2005b84911SRob Clark #include <linux/dma-buf.h> 2101c8f1c4SDan Williams #include <linux/pfn_t.h> 22c8afe684SRob Clark 23c8afe684SRob Clark #include "msm_drv.h" 24fde5de6cSRob Clark #include "msm_fence.h" 25c8afe684SRob Clark #include "msm_gem.h" 267198e6b0SRob Clark #include "msm_gpu.h" 27871d812aSRob Clark #include "msm_mmu.h" 28c8afe684SRob Clark 29871d812aSRob Clark static dma_addr_t physaddr(struct drm_gem_object *obj) 30871d812aSRob Clark { 31871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 32871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 33871d812aSRob Clark return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + 34871d812aSRob Clark priv->vram.paddr; 35871d812aSRob Clark } 36871d812aSRob Clark 37072f1f91SRob Clark static bool use_pages(struct drm_gem_object *obj) 38072f1f91SRob Clark { 39072f1f91SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 40072f1f91SRob Clark return !msm_obj->vram_node; 41072f1f91SRob Clark } 42072f1f91SRob Clark 43871d812aSRob Clark /* allocate pages from VRAM carveout, used when no IOMMU: */ 44871d812aSRob Clark static struct page **get_pages_vram(struct drm_gem_object *obj, 45871d812aSRob Clark int npages) 46871d812aSRob Clark { 47871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 48871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 49871d812aSRob Clark dma_addr_t paddr; 50871d812aSRob Clark struct page **p; 51871d812aSRob Clark int ret, i; 52871d812aSRob Clark 53871d812aSRob Clark p = drm_malloc_ab(npages, sizeof(struct page *)); 54871d812aSRob Clark if (!p) 55871d812aSRob Clark return ERR_PTR(-ENOMEM); 56871d812aSRob Clark 57871d812aSRob Clark ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, 58871d812aSRob Clark npages, 0, DRM_MM_SEARCH_DEFAULT); 59871d812aSRob Clark if (ret) { 60871d812aSRob Clark drm_free_large(p); 61871d812aSRob Clark return ERR_PTR(ret); 62871d812aSRob Clark } 63871d812aSRob Clark 64871d812aSRob Clark paddr = physaddr(obj); 65871d812aSRob Clark for (i = 0; i < npages; i++) { 66871d812aSRob Clark p[i] = phys_to_page(paddr); 67871d812aSRob Clark paddr += PAGE_SIZE; 68871d812aSRob Clark } 69871d812aSRob Clark 70871d812aSRob Clark return p; 71871d812aSRob Clark } 72c8afe684SRob Clark 73c8afe684SRob Clark /* called with dev->struct_mutex held */ 74c8afe684SRob Clark static struct page **get_pages(struct drm_gem_object *obj) 75c8afe684SRob Clark { 76c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 77c8afe684SRob Clark 78c8afe684SRob Clark if (!msm_obj->pages) { 79c8afe684SRob Clark struct drm_device *dev = obj->dev; 80871d812aSRob Clark struct page **p; 81c8afe684SRob Clark int npages = obj->size >> PAGE_SHIFT; 82c8afe684SRob Clark 83072f1f91SRob Clark if (use_pages(obj)) 840cdbe8acSDavid Herrmann p = drm_gem_get_pages(obj); 85871d812aSRob Clark else 86871d812aSRob Clark p = get_pages_vram(obj, npages); 87871d812aSRob Clark 88c8afe684SRob Clark if (IS_ERR(p)) { 89c8afe684SRob Clark dev_err(dev->dev, "could not get pages: %ld\n", 90c8afe684SRob Clark PTR_ERR(p)); 91c8afe684SRob Clark return p; 92c8afe684SRob Clark } 93c8afe684SRob Clark 94c8afe684SRob Clark msm_obj->sgt = drm_prime_pages_to_sg(p, npages); 951f70e079SWei Yongjun if (IS_ERR(msm_obj->sgt)) { 96c8afe684SRob Clark dev_err(dev->dev, "failed to allocate sgt\n"); 971f70e079SWei Yongjun return ERR_CAST(msm_obj->sgt); 98c8afe684SRob Clark } 99c8afe684SRob Clark 100c8afe684SRob Clark msm_obj->pages = p; 101c8afe684SRob Clark 102c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 103c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 104c8afe684SRob Clark */ 105c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 106c8afe684SRob Clark dma_map_sg(dev->dev, msm_obj->sgt->sgl, 107c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 108c8afe684SRob Clark } 109c8afe684SRob Clark 110c8afe684SRob Clark return msm_obj->pages; 111c8afe684SRob Clark } 112c8afe684SRob Clark 113c8afe684SRob Clark static void put_pages(struct drm_gem_object *obj) 114c8afe684SRob Clark { 115c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 116c8afe684SRob Clark 117c8afe684SRob Clark if (msm_obj->pages) { 118c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 119c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 120c8afe684SRob Clark */ 121c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 122c8afe684SRob Clark dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, 123c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 124c8afe684SRob Clark sg_free_table(msm_obj->sgt); 125c8afe684SRob Clark kfree(msm_obj->sgt); 126c8afe684SRob Clark 127072f1f91SRob Clark if (use_pages(obj)) 128c8afe684SRob Clark drm_gem_put_pages(obj, msm_obj->pages, true, false); 1291ffa2425SMicah Richert else { 130871d812aSRob Clark drm_mm_remove_node(msm_obj->vram_node); 1311ffa2425SMicah Richert drm_free_large(msm_obj->pages); 1321ffa2425SMicah Richert } 133871d812aSRob Clark 134c8afe684SRob Clark msm_obj->pages = NULL; 135c8afe684SRob Clark } 136c8afe684SRob Clark } 137c8afe684SRob Clark 13805b84911SRob Clark struct page **msm_gem_get_pages(struct drm_gem_object *obj) 13905b84911SRob Clark { 14005b84911SRob Clark struct drm_device *dev = obj->dev; 14105b84911SRob Clark struct page **p; 14205b84911SRob Clark mutex_lock(&dev->struct_mutex); 14305b84911SRob Clark p = get_pages(obj); 14405b84911SRob Clark mutex_unlock(&dev->struct_mutex); 14505b84911SRob Clark return p; 14605b84911SRob Clark } 14705b84911SRob Clark 14805b84911SRob Clark void msm_gem_put_pages(struct drm_gem_object *obj) 14905b84911SRob Clark { 15005b84911SRob Clark /* when we start tracking the pin count, then do something here */ 15105b84911SRob Clark } 15205b84911SRob Clark 153c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 154c8afe684SRob Clark struct vm_area_struct *vma) 155c8afe684SRob Clark { 156c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 157c8afe684SRob Clark 158c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 159c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 160c8afe684SRob Clark 161c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 162c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 163c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 164c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 165c8afe684SRob Clark } else { 166c8afe684SRob Clark /* 167c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 168c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 169c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 170c8afe684SRob Clark */ 171c8afe684SRob Clark fput(vma->vm_file); 172c8afe684SRob Clark get_file(obj->filp); 173c8afe684SRob Clark vma->vm_pgoff = 0; 174c8afe684SRob Clark vma->vm_file = obj->filp; 175c8afe684SRob Clark 176c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 177c8afe684SRob Clark } 178c8afe684SRob Clark 179c8afe684SRob Clark return 0; 180c8afe684SRob Clark } 181c8afe684SRob Clark 182c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 183c8afe684SRob Clark { 184c8afe684SRob Clark int ret; 185c8afe684SRob Clark 186c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 187c8afe684SRob Clark if (ret) { 188c8afe684SRob Clark DBG("mmap failed: %d", ret); 189c8afe684SRob Clark return ret; 190c8afe684SRob Clark } 191c8afe684SRob Clark 192c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 193c8afe684SRob Clark } 194c8afe684SRob Clark 195c8afe684SRob Clark int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 196c8afe684SRob Clark { 197c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 198c8afe684SRob Clark struct drm_device *dev = obj->dev; 199d78d383aSRob Clark struct msm_drm_private *priv = dev->dev_private; 200c8afe684SRob Clark struct page **pages; 201c8afe684SRob Clark unsigned long pfn; 202c8afe684SRob Clark pgoff_t pgoff; 203c8afe684SRob Clark int ret; 204c8afe684SRob Clark 205d78d383aSRob Clark /* This should only happen if userspace tries to pass a mmap'd 206d78d383aSRob Clark * but unfaulted gem bo vaddr into submit ioctl, triggering 207d78d383aSRob Clark * a page fault while struct_mutex is already held. This is 208d78d383aSRob Clark * not a valid use-case so just bail. 209d78d383aSRob Clark */ 210d78d383aSRob Clark if (priv->struct_mutex_task == current) 211d78d383aSRob Clark return VM_FAULT_SIGBUS; 212d78d383aSRob Clark 213c8afe684SRob Clark /* Make sure we don't parallel update on a fault, nor move or remove 214c8afe684SRob Clark * something from beneath our feet 215c8afe684SRob Clark */ 216c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 217c8afe684SRob Clark if (ret) 218c8afe684SRob Clark goto out; 219c8afe684SRob Clark 220c8afe684SRob Clark /* make sure we have pages attached now */ 221c8afe684SRob Clark pages = get_pages(obj); 222c8afe684SRob Clark if (IS_ERR(pages)) { 223c8afe684SRob Clark ret = PTR_ERR(pages); 224c8afe684SRob Clark goto out_unlock; 225c8afe684SRob Clark } 226c8afe684SRob Clark 227c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 228c8afe684SRob Clark pgoff = ((unsigned long)vmf->virtual_address - 229c8afe684SRob Clark vma->vm_start) >> PAGE_SHIFT; 230c8afe684SRob Clark 231871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 232c8afe684SRob Clark 233c8afe684SRob Clark VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, 234c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 235c8afe684SRob Clark 23601c8f1c4SDan Williams ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, 23701c8f1c4SDan Williams __pfn_to_pfn_t(pfn, PFN_DEV)); 238c8afe684SRob Clark 239c8afe684SRob Clark out_unlock: 240c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 241c8afe684SRob Clark out: 242c8afe684SRob Clark switch (ret) { 243c8afe684SRob Clark case -EAGAIN: 244c8afe684SRob Clark case 0: 245c8afe684SRob Clark case -ERESTARTSYS: 246c8afe684SRob Clark case -EINTR: 247505886d5SRob Clark case -EBUSY: 248505886d5SRob Clark /* 249505886d5SRob Clark * EBUSY is ok: this just means that another thread 250505886d5SRob Clark * already did the job. 251505886d5SRob Clark */ 252c8afe684SRob Clark return VM_FAULT_NOPAGE; 253c8afe684SRob Clark case -ENOMEM: 254c8afe684SRob Clark return VM_FAULT_OOM; 255c8afe684SRob Clark default: 256c8afe684SRob Clark return VM_FAULT_SIGBUS; 257c8afe684SRob Clark } 258c8afe684SRob Clark } 259c8afe684SRob Clark 260c8afe684SRob Clark /** get mmap offset */ 261c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 262c8afe684SRob Clark { 263c8afe684SRob Clark struct drm_device *dev = obj->dev; 264c8afe684SRob Clark int ret; 265c8afe684SRob Clark 266c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 267c8afe684SRob Clark 268c8afe684SRob Clark /* Make it mmapable */ 269c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 270c8afe684SRob Clark 271c8afe684SRob Clark if (ret) { 272c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 273c8afe684SRob Clark return 0; 274c8afe684SRob Clark } 275c8afe684SRob Clark 276c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 277c8afe684SRob Clark } 278c8afe684SRob Clark 279c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 280c8afe684SRob Clark { 281c8afe684SRob Clark uint64_t offset; 282c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 283c8afe684SRob Clark offset = mmap_offset(obj); 284c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 285c8afe684SRob Clark return offset; 286c8afe684SRob Clark } 287c8afe684SRob Clark 2884fe5f65eSRob Clark static void 2894fe5f65eSRob Clark put_iova(struct drm_gem_object *obj) 2904fe5f65eSRob Clark { 2914fe5f65eSRob Clark struct drm_device *dev = obj->dev; 2924fe5f65eSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 2934fe5f65eSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 2944fe5f65eSRob Clark int id; 2954fe5f65eSRob Clark 2964fe5f65eSRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 2974fe5f65eSRob Clark 2984fe5f65eSRob Clark for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { 299667ce33eSRob Clark msm_gem_unmap_vma(priv->aspace[id], 300667ce33eSRob Clark &msm_obj->domain[id], msm_obj->sgt); 3014fe5f65eSRob Clark } 3024fe5f65eSRob Clark } 3034fe5f65eSRob Clark 304c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 305c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 306c8afe684SRob Clark * iova ref if you know one is already held. 307c8afe684SRob Clark * 308c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 309c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 310c8afe684SRob Clark */ 311c8afe684SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, 312c8afe684SRob Clark uint32_t *iova) 313c8afe684SRob Clark { 314c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 315c8afe684SRob Clark int ret = 0; 316c8afe684SRob Clark 317c8afe684SRob Clark if (!msm_obj->domain[id].iova) { 318c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 319871d812aSRob Clark struct page **pages = get_pages(obj); 320871d812aSRob Clark 321c8afe684SRob Clark if (IS_ERR(pages)) 322c8afe684SRob Clark return PTR_ERR(pages); 323871d812aSRob Clark 324871d812aSRob Clark if (iommu_present(&platform_bus_type)) { 325667ce33eSRob Clark ret = msm_gem_map_vma(priv->aspace[id], &msm_obj->domain[id], 326667ce33eSRob Clark msm_obj->sgt, obj->size >> PAGE_SHIFT); 327871d812aSRob Clark } else { 328871d812aSRob Clark msm_obj->domain[id].iova = physaddr(obj); 329871d812aSRob Clark } 330c8afe684SRob Clark } 331c8afe684SRob Clark 332c8afe684SRob Clark if (!ret) 333c8afe684SRob Clark *iova = msm_obj->domain[id].iova; 334c8afe684SRob Clark 335c8afe684SRob Clark return ret; 336c8afe684SRob Clark } 337c8afe684SRob Clark 3382638d90aSRob Clark /* get iova, taking a reference. Should have a matching put */ 339c8afe684SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) 340c8afe684SRob Clark { 341edd4fc63SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 342c8afe684SRob Clark int ret; 343edd4fc63SRob Clark 344edd4fc63SRob Clark /* this is safe right now because we don't unmap until the 345edd4fc63SRob Clark * bo is deleted: 346edd4fc63SRob Clark */ 347edd4fc63SRob Clark if (msm_obj->domain[id].iova) { 348edd4fc63SRob Clark *iova = msm_obj->domain[id].iova; 349edd4fc63SRob Clark return 0; 350edd4fc63SRob Clark } 351edd4fc63SRob Clark 352c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 353c8afe684SRob Clark ret = msm_gem_get_iova_locked(obj, id, iova); 354c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 355c8afe684SRob Clark return ret; 356c8afe684SRob Clark } 357c8afe684SRob Clark 3582638d90aSRob Clark /* get iova without taking a reference, used in places where you have 3592638d90aSRob Clark * already done a 'msm_gem_get_iova()'. 3602638d90aSRob Clark */ 3612638d90aSRob Clark uint32_t msm_gem_iova(struct drm_gem_object *obj, int id) 3622638d90aSRob Clark { 3632638d90aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3642638d90aSRob Clark WARN_ON(!msm_obj->domain[id].iova); 3652638d90aSRob Clark return msm_obj->domain[id].iova; 3662638d90aSRob Clark } 3672638d90aSRob Clark 368c8afe684SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, int id) 369c8afe684SRob Clark { 370c8afe684SRob Clark // XXX TODO .. 371c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 372c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 373c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 374c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 375c8afe684SRob Clark // things that are no longer needed.. 376c8afe684SRob Clark } 377c8afe684SRob Clark 378c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 379c8afe684SRob Clark struct drm_mode_create_dumb *args) 380c8afe684SRob Clark { 381c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 382c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 383c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 384c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 385c8afe684SRob Clark } 386c8afe684SRob Clark 387c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 388c8afe684SRob Clark uint32_t handle, uint64_t *offset) 389c8afe684SRob Clark { 390c8afe684SRob Clark struct drm_gem_object *obj; 391c8afe684SRob Clark int ret = 0; 392c8afe684SRob Clark 393c8afe684SRob Clark /* GEM does all our handle to object mapping */ 394a8ad0bd8SChris Wilson obj = drm_gem_object_lookup(file, handle); 395c8afe684SRob Clark if (obj == NULL) { 396c8afe684SRob Clark ret = -ENOENT; 397c8afe684SRob Clark goto fail; 398c8afe684SRob Clark } 399c8afe684SRob Clark 400c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 401c8afe684SRob Clark 402c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 403c8afe684SRob Clark 404c8afe684SRob Clark fail: 405c8afe684SRob Clark return ret; 406c8afe684SRob Clark } 407c8afe684SRob Clark 40818f23049SRob Clark void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj) 409c8afe684SRob Clark { 410c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 411c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 412c8afe684SRob Clark if (!msm_obj->vaddr) { 413c8afe684SRob Clark struct page **pages = get_pages(obj); 414c8afe684SRob Clark if (IS_ERR(pages)) 415c8afe684SRob Clark return ERR_CAST(pages); 416c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 417c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 41869a834c2SRob Clark if (msm_obj->vaddr == NULL) 41969a834c2SRob Clark return ERR_PTR(-ENOMEM); 420c8afe684SRob Clark } 421e1e9db2cSRob Clark msm_obj->vmap_count++; 422c8afe684SRob Clark return msm_obj->vaddr; 423c8afe684SRob Clark } 424c8afe684SRob Clark 42518f23049SRob Clark void *msm_gem_get_vaddr(struct drm_gem_object *obj) 426c8afe684SRob Clark { 427c8afe684SRob Clark void *ret; 428c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 42918f23049SRob Clark ret = msm_gem_get_vaddr_locked(obj); 430c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 431c8afe684SRob Clark return ret; 432c8afe684SRob Clark } 433c8afe684SRob Clark 43418f23049SRob Clark void msm_gem_put_vaddr_locked(struct drm_gem_object *obj) 43518f23049SRob Clark { 436e1e9db2cSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 43718f23049SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 438e1e9db2cSRob Clark WARN_ON(msm_obj->vmap_count < 1); 439e1e9db2cSRob Clark msm_obj->vmap_count--; 44018f23049SRob Clark } 44118f23049SRob Clark 44218f23049SRob Clark void msm_gem_put_vaddr(struct drm_gem_object *obj) 44318f23049SRob Clark { 444e1e9db2cSRob Clark mutex_lock(&obj->dev->struct_mutex); 445e1e9db2cSRob Clark msm_gem_put_vaddr_locked(obj); 446e1e9db2cSRob Clark mutex_unlock(&obj->dev->struct_mutex); 44718f23049SRob Clark } 44818f23049SRob Clark 4494cd33c48SRob Clark /* Update madvise status, returns true if not purged, else 4504cd33c48SRob Clark * false or -errno. 4514cd33c48SRob Clark */ 4524cd33c48SRob Clark int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) 4534cd33c48SRob Clark { 4544cd33c48SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4554cd33c48SRob Clark 4564cd33c48SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 4574cd33c48SRob Clark 4584cd33c48SRob Clark if (msm_obj->madv != __MSM_MADV_PURGED) 4594cd33c48SRob Clark msm_obj->madv = madv; 4604cd33c48SRob Clark 4614cd33c48SRob Clark return (msm_obj->madv != __MSM_MADV_PURGED); 4624cd33c48SRob Clark } 4634cd33c48SRob Clark 46468209390SRob Clark void msm_gem_purge(struct drm_gem_object *obj) 46568209390SRob Clark { 46668209390SRob Clark struct drm_device *dev = obj->dev; 46768209390SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 46868209390SRob Clark 46968209390SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 47068209390SRob Clark WARN_ON(!is_purgeable(msm_obj)); 47168209390SRob Clark WARN_ON(obj->import_attach); 47268209390SRob Clark 47368209390SRob Clark put_iova(obj); 47468209390SRob Clark 475e1e9db2cSRob Clark msm_gem_vunmap(obj); 47668209390SRob Clark 47768209390SRob Clark put_pages(obj); 47868209390SRob Clark 47968209390SRob Clark msm_obj->madv = __MSM_MADV_PURGED; 48068209390SRob Clark 48168209390SRob Clark drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 48268209390SRob Clark drm_gem_free_mmap_offset(obj); 48368209390SRob Clark 48468209390SRob Clark /* Our goal here is to return as much of the memory as 48568209390SRob Clark * is possible back to the system as we are called from OOM. 48668209390SRob Clark * To do this we must instruct the shmfs to drop all of its 48768209390SRob Clark * backing pages, *now*. 48868209390SRob Clark */ 48968209390SRob Clark shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); 49068209390SRob Clark 49168209390SRob Clark invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 49268209390SRob Clark 0, (loff_t)-1); 49368209390SRob Clark } 49468209390SRob Clark 495e1e9db2cSRob Clark void msm_gem_vunmap(struct drm_gem_object *obj) 496e1e9db2cSRob Clark { 497e1e9db2cSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 498e1e9db2cSRob Clark 499e1e9db2cSRob Clark if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj))) 500e1e9db2cSRob Clark return; 501e1e9db2cSRob Clark 502e1e9db2cSRob Clark vunmap(msm_obj->vaddr); 503e1e9db2cSRob Clark msm_obj->vaddr = NULL; 504e1e9db2cSRob Clark } 505e1e9db2cSRob Clark 506b6295f9aSRob Clark /* must be called before _move_to_active().. */ 507b6295f9aSRob Clark int msm_gem_sync_object(struct drm_gem_object *obj, 508b6295f9aSRob Clark struct msm_fence_context *fctx, bool exclusive) 509b6295f9aSRob Clark { 510b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 511b6295f9aSRob Clark struct reservation_object_list *fobj; 512f54d1867SChris Wilson struct dma_fence *fence; 513b6295f9aSRob Clark int i, ret; 514b6295f9aSRob Clark 515b6295f9aSRob Clark if (!exclusive) { 516b6295f9aSRob Clark /* NOTE: _reserve_shared() must happen before _add_shared_fence(), 517b6295f9aSRob Clark * which makes this a slightly strange place to call it. OTOH this 518b6295f9aSRob Clark * is a convenient can-fail point to hook it in. (And similar to 519b6295f9aSRob Clark * how etnaviv and nouveau handle this.) 520b6295f9aSRob Clark */ 521b6295f9aSRob Clark ret = reservation_object_reserve_shared(msm_obj->resv); 522b6295f9aSRob Clark if (ret) 523b6295f9aSRob Clark return ret; 524b6295f9aSRob Clark } 525b6295f9aSRob Clark 526b6295f9aSRob Clark fobj = reservation_object_get_list(msm_obj->resv); 527b6295f9aSRob Clark if (!fobj || (fobj->shared_count == 0)) { 528b6295f9aSRob Clark fence = reservation_object_get_excl(msm_obj->resv); 529b6295f9aSRob Clark /* don't need to wait on our own fences, since ring is fifo */ 530b6295f9aSRob Clark if (fence && (fence->context != fctx->context)) { 531f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 532b6295f9aSRob Clark if (ret) 533b6295f9aSRob Clark return ret; 534b6295f9aSRob Clark } 535b6295f9aSRob Clark } 536b6295f9aSRob Clark 537b6295f9aSRob Clark if (!exclusive || !fobj) 538b6295f9aSRob Clark return 0; 539b6295f9aSRob Clark 540b6295f9aSRob Clark for (i = 0; i < fobj->shared_count; i++) { 541b6295f9aSRob Clark fence = rcu_dereference_protected(fobj->shared[i], 542b6295f9aSRob Clark reservation_object_held(msm_obj->resv)); 543b6295f9aSRob Clark if (fence->context != fctx->context) { 544f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 545b6295f9aSRob Clark if (ret) 546b6295f9aSRob Clark return ret; 547b6295f9aSRob Clark } 548b6295f9aSRob Clark } 549b6295f9aSRob Clark 550b6295f9aSRob Clark return 0; 551b6295f9aSRob Clark } 552b6295f9aSRob Clark 5537198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 554f54d1867SChris Wilson struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence) 5557198e6b0SRob Clark { 5567198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 5574cd33c48SRob Clark WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); 5587198e6b0SRob Clark msm_obj->gpu = gpu; 559b6295f9aSRob Clark if (exclusive) 560b6295f9aSRob Clark reservation_object_add_excl_fence(msm_obj->resv, fence); 561bf6811f3SRob Clark else 562b6295f9aSRob Clark reservation_object_add_shared_fence(msm_obj->resv, fence); 5637198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 5647198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 5657198e6b0SRob Clark } 5667198e6b0SRob Clark 5677198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 5687198e6b0SRob Clark { 5697198e6b0SRob Clark struct drm_device *dev = obj->dev; 5707198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 5717198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 5727198e6b0SRob Clark 5737198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 5747198e6b0SRob Clark 5757198e6b0SRob Clark msm_obj->gpu = NULL; 5767198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 5777198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 5787198e6b0SRob Clark } 5797198e6b0SRob Clark 580ba00c3f2SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 581ba00c3f2SRob Clark { 582b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 583b6295f9aSRob Clark bool write = !!(op & MSM_PREP_WRITE); 584f755e227SChris Wilson unsigned long remain = 585f755e227SChris Wilson op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); 586f755e227SChris Wilson long ret; 587b6295f9aSRob Clark 588b6295f9aSRob Clark ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, 589f755e227SChris Wilson true, remain); 590f755e227SChris Wilson if (ret == 0) 591f755e227SChris Wilson return remain == 0 ? -EBUSY : -ETIMEDOUT; 592f755e227SChris Wilson else if (ret < 0) 593f755e227SChris Wilson return ret; 594ba00c3f2SRob Clark 5957198e6b0SRob Clark /* TODO cache maintenance */ 5967198e6b0SRob Clark 597b6295f9aSRob Clark return 0; 5987198e6b0SRob Clark } 5997198e6b0SRob Clark 6007198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 6017198e6b0SRob Clark { 6027198e6b0SRob Clark /* TODO cache maintenance */ 603c8afe684SRob Clark return 0; 604c8afe684SRob Clark } 605c8afe684SRob Clark 606c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 607f54d1867SChris Wilson static void describe_fence(struct dma_fence *fence, const char *type, 608b6295f9aSRob Clark struct seq_file *m) 609b6295f9aSRob Clark { 610f54d1867SChris Wilson if (!dma_fence_is_signaled(fence)) 611b6295f9aSRob Clark seq_printf(m, "\t%9s: %s %s seq %u\n", type, 612b6295f9aSRob Clark fence->ops->get_driver_name(fence), 613b6295f9aSRob Clark fence->ops->get_timeline_name(fence), 614b6295f9aSRob Clark fence->seqno); 615b6295f9aSRob Clark } 616b6295f9aSRob Clark 617c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 618c8afe684SRob Clark { 619c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 620b6295f9aSRob Clark struct reservation_object *robj = msm_obj->resv; 621b6295f9aSRob Clark struct reservation_object_list *fobj; 622667ce33eSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 623f54d1867SChris Wilson struct dma_fence *fence; 624c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 6254cd33c48SRob Clark const char *madv; 626667ce33eSRob Clark unsigned id; 627c8afe684SRob Clark 628b6295f9aSRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 629b6295f9aSRob Clark 6304cd33c48SRob Clark switch (msm_obj->madv) { 6314cd33c48SRob Clark case __MSM_MADV_PURGED: 6324cd33c48SRob Clark madv = " purged"; 6334cd33c48SRob Clark break; 6344cd33c48SRob Clark case MSM_MADV_DONTNEED: 6354cd33c48SRob Clark madv = " purgeable"; 6364cd33c48SRob Clark break; 6374cd33c48SRob Clark case MSM_MADV_WILLNEED: 6384cd33c48SRob Clark default: 6394cd33c48SRob Clark madv = ""; 6404cd33c48SRob Clark break; 6414cd33c48SRob Clark } 6424cd33c48SRob Clark 643667ce33eSRob Clark seq_printf(m, "%08x: %c %2d (%2d) %08llx %p\t", 6447198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 645bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 646667ce33eSRob Clark off, msm_obj->vaddr); 647667ce33eSRob Clark 648667ce33eSRob Clark for (id = 0; id < priv->num_aspaces; id++) 649667ce33eSRob Clark seq_printf(m, " %08llx", msm_obj->domain[id].iova); 650667ce33eSRob Clark 651667ce33eSRob Clark seq_printf(m, " %zu%s\n", obj->size, madv); 652b6295f9aSRob Clark 653b6295f9aSRob Clark rcu_read_lock(); 654b6295f9aSRob Clark fobj = rcu_dereference(robj->fence); 655b6295f9aSRob Clark if (fobj) { 656b6295f9aSRob Clark unsigned int i, shared_count = fobj->shared_count; 657b6295f9aSRob Clark 658b6295f9aSRob Clark for (i = 0; i < shared_count; i++) { 659b6295f9aSRob Clark fence = rcu_dereference(fobj->shared[i]); 660b6295f9aSRob Clark describe_fence(fence, "Shared", m); 661b6295f9aSRob Clark } 662b6295f9aSRob Clark } 663b6295f9aSRob Clark 664b6295f9aSRob Clark fence = rcu_dereference(robj->fence_excl); 665b6295f9aSRob Clark if (fence) 666b6295f9aSRob Clark describe_fence(fence, "Exclusive", m); 667b6295f9aSRob Clark rcu_read_unlock(); 668c8afe684SRob Clark } 669c8afe684SRob Clark 670c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 671c8afe684SRob Clark { 672c8afe684SRob Clark struct msm_gem_object *msm_obj; 673c8afe684SRob Clark int count = 0; 674c8afe684SRob Clark size_t size = 0; 675c8afe684SRob Clark 676c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 677c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 678c8afe684SRob Clark seq_printf(m, " "); 679c8afe684SRob Clark msm_gem_describe(obj, m); 680c8afe684SRob Clark count++; 681c8afe684SRob Clark size += obj->size; 682c8afe684SRob Clark } 683c8afe684SRob Clark 684c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 685c8afe684SRob Clark } 686c8afe684SRob Clark #endif 687c8afe684SRob Clark 688c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 689c8afe684SRob Clark { 690c8afe684SRob Clark struct drm_device *dev = obj->dev; 691c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 692c8afe684SRob Clark 693c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 694c8afe684SRob Clark 6957198e6b0SRob Clark /* object should not be on active list: */ 6967198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 6977198e6b0SRob Clark 698c8afe684SRob Clark list_del(&msm_obj->mm_list); 699c8afe684SRob Clark 7004fe5f65eSRob Clark put_iova(obj); 701c8afe684SRob Clark 70205b84911SRob Clark if (obj->import_attach) { 70305b84911SRob Clark if (msm_obj->vaddr) 70405b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 70505b84911SRob Clark 70605b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 70705b84911SRob Clark * ours, just free the array we allocated: 70805b84911SRob Clark */ 70905b84911SRob Clark if (msm_obj->pages) 71005b84911SRob Clark drm_free_large(msm_obj->pages); 71105b84911SRob Clark 712f28730c8Sjilai wang drm_prime_gem_destroy(obj, msm_obj->sgt); 71305b84911SRob Clark } else { 714e1e9db2cSRob Clark msm_gem_vunmap(obj); 715c8afe684SRob Clark put_pages(obj); 71605b84911SRob Clark } 717c8afe684SRob Clark 7187198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 7197198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 7207198e6b0SRob Clark 721c8afe684SRob Clark drm_gem_object_release(obj); 722c8afe684SRob Clark 723c8afe684SRob Clark kfree(msm_obj); 724c8afe684SRob Clark } 725c8afe684SRob Clark 726c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 727c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 728c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 729c8afe684SRob Clark { 730c8afe684SRob Clark struct drm_gem_object *obj; 731c8afe684SRob Clark int ret; 732c8afe684SRob Clark 733c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 734c8afe684SRob Clark if (ret) 735c8afe684SRob Clark return ret; 736c8afe684SRob Clark 737c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 738c8afe684SRob Clark 739c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 740c8afe684SRob Clark 741c8afe684SRob Clark if (IS_ERR(obj)) 742c8afe684SRob Clark return PTR_ERR(obj); 743c8afe684SRob Clark 744c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 745c8afe684SRob Clark 746c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 747c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 748c8afe684SRob Clark 749c8afe684SRob Clark return ret; 750c8afe684SRob Clark } 751c8afe684SRob Clark 75205b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 75305b84911SRob Clark uint32_t size, uint32_t flags, 75479f0e202SRob Clark struct reservation_object *resv, 75505b84911SRob Clark struct drm_gem_object **obj) 756c8afe684SRob Clark { 757c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 758c8afe684SRob Clark struct msm_gem_object *msm_obj; 759072f1f91SRob Clark bool use_vram = false; 760c8afe684SRob Clark 761c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 762c8afe684SRob Clark case MSM_BO_UNCACHED: 763c8afe684SRob Clark case MSM_BO_CACHED: 764c8afe684SRob Clark case MSM_BO_WC: 765c8afe684SRob Clark break; 766c8afe684SRob Clark default: 767c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 768c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 76905b84911SRob Clark return -EINVAL; 770c8afe684SRob Clark } 771c8afe684SRob Clark 772871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 773072f1f91SRob Clark use_vram = true; 774072f1f91SRob Clark else if ((flags & MSM_BO_STOLEN) && priv->vram.size) 775072f1f91SRob Clark use_vram = true; 776072f1f91SRob Clark 777072f1f91SRob Clark if (WARN_ON(use_vram && !priv->vram.size)) 778072f1f91SRob Clark return -EINVAL; 779072f1f91SRob Clark 780667ce33eSRob Clark msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 78105b84911SRob Clark if (!msm_obj) 78205b84911SRob Clark return -ENOMEM; 783c8afe684SRob Clark 784072f1f91SRob Clark if (use_vram) 785667ce33eSRob Clark msm_obj->vram_node = &msm_obj->domain[0].node; 786871d812aSRob Clark 787c8afe684SRob Clark msm_obj->flags = flags; 7884cd33c48SRob Clark msm_obj->madv = MSM_MADV_WILLNEED; 789c8afe684SRob Clark 79079f0e202SRob Clark if (resv) { 79179f0e202SRob Clark msm_obj->resv = resv; 79279f0e202SRob Clark } else { 7937198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 7947198e6b0SRob Clark reservation_object_init(msm_obj->resv); 79579f0e202SRob Clark } 796c8afe684SRob Clark 7977198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 798c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 799c8afe684SRob Clark 80005b84911SRob Clark *obj = &msm_obj->base; 80105b84911SRob Clark 80205b84911SRob Clark return 0; 80305b84911SRob Clark } 80405b84911SRob Clark 80505b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 80605b84911SRob Clark uint32_t size, uint32_t flags) 80705b84911SRob Clark { 808871d812aSRob Clark struct drm_gem_object *obj = NULL; 80905b84911SRob Clark int ret; 81005b84911SRob Clark 81105b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 81205b84911SRob Clark 81305b84911SRob Clark size = PAGE_ALIGN(size); 81405b84911SRob Clark 81579f0e202SRob Clark ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); 81605b84911SRob Clark if (ret) 81705b84911SRob Clark goto fail; 81805b84911SRob Clark 819072f1f91SRob Clark if (use_pages(obj)) { 82005b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 82105b84911SRob Clark if (ret) 82205b84911SRob Clark goto fail; 823871d812aSRob Clark } else { 824871d812aSRob Clark drm_gem_private_object_init(dev, obj, size); 825871d812aSRob Clark } 82605b84911SRob Clark 82705b84911SRob Clark return obj; 82805b84911SRob Clark 82905b84911SRob Clark fail: 8309999f105SRob Clark drm_gem_object_unreference(obj); 83105b84911SRob Clark return ERR_PTR(ret); 83205b84911SRob Clark } 83305b84911SRob Clark 83405b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 83579f0e202SRob Clark struct dma_buf *dmabuf, struct sg_table *sgt) 83605b84911SRob Clark { 83705b84911SRob Clark struct msm_gem_object *msm_obj; 83805b84911SRob Clark struct drm_gem_object *obj; 83979f0e202SRob Clark uint32_t size; 84005b84911SRob Clark int ret, npages; 84105b84911SRob Clark 842871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 843871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 844871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 845871d812aSRob Clark return ERR_PTR(-EINVAL); 846871d812aSRob Clark } 847871d812aSRob Clark 84879f0e202SRob Clark size = PAGE_ALIGN(dmabuf->size); 84905b84911SRob Clark 85079f0e202SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj); 85105b84911SRob Clark if (ret) 85205b84911SRob Clark goto fail; 85305b84911SRob Clark 85405b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 85505b84911SRob Clark 85605b84911SRob Clark npages = size / PAGE_SIZE; 85705b84911SRob Clark 85805b84911SRob Clark msm_obj = to_msm_bo(obj); 85905b84911SRob Clark msm_obj->sgt = sgt; 86005b84911SRob Clark msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); 86105b84911SRob Clark if (!msm_obj->pages) { 86205b84911SRob Clark ret = -ENOMEM; 86305b84911SRob Clark goto fail; 86405b84911SRob Clark } 86505b84911SRob Clark 86605b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 86705b84911SRob Clark if (ret) 86805b84911SRob Clark goto fail; 86905b84911SRob Clark 870c8afe684SRob Clark return obj; 871c8afe684SRob Clark 872c8afe684SRob Clark fail: 873c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 874c8afe684SRob Clark return ERR_PTR(ret); 875c8afe684SRob Clark } 876