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: */ 2281a29d85eSJan Kara pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 229c8afe684SRob Clark 230871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 231c8afe684SRob Clark 2321a29d85eSJan Kara VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 233c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 234c8afe684SRob Clark 2351a29d85eSJan Kara ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); 236c8afe684SRob Clark 237c8afe684SRob Clark out_unlock: 238c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 239c8afe684SRob Clark out: 240c8afe684SRob Clark switch (ret) { 241c8afe684SRob Clark case -EAGAIN: 242c8afe684SRob Clark case 0: 243c8afe684SRob Clark case -ERESTARTSYS: 244c8afe684SRob Clark case -EINTR: 245505886d5SRob Clark case -EBUSY: 246505886d5SRob Clark /* 247505886d5SRob Clark * EBUSY is ok: this just means that another thread 248505886d5SRob Clark * already did the job. 249505886d5SRob Clark */ 250c8afe684SRob Clark return VM_FAULT_NOPAGE; 251c8afe684SRob Clark case -ENOMEM: 252c8afe684SRob Clark return VM_FAULT_OOM; 253c8afe684SRob Clark default: 254c8afe684SRob Clark return VM_FAULT_SIGBUS; 255c8afe684SRob Clark } 256c8afe684SRob Clark } 257c8afe684SRob Clark 258c8afe684SRob Clark /** get mmap offset */ 259c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 260c8afe684SRob Clark { 261c8afe684SRob Clark struct drm_device *dev = obj->dev; 262c8afe684SRob Clark int ret; 263c8afe684SRob Clark 264c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 265c8afe684SRob Clark 266c8afe684SRob Clark /* Make it mmapable */ 267c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 268c8afe684SRob Clark 269c8afe684SRob Clark if (ret) { 270c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 271c8afe684SRob Clark return 0; 272c8afe684SRob Clark } 273c8afe684SRob Clark 274c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 275c8afe684SRob Clark } 276c8afe684SRob Clark 277c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 278c8afe684SRob Clark { 279c8afe684SRob Clark uint64_t offset; 280c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 281c8afe684SRob Clark offset = mmap_offset(obj); 282c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 283c8afe684SRob Clark return offset; 284c8afe684SRob Clark } 285c8afe684SRob Clark 2864fe5f65eSRob Clark static void 2874fe5f65eSRob Clark put_iova(struct drm_gem_object *obj) 2884fe5f65eSRob Clark { 2894fe5f65eSRob Clark struct drm_device *dev = obj->dev; 2904fe5f65eSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 2914fe5f65eSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 2924fe5f65eSRob Clark int id; 2934fe5f65eSRob Clark 2944fe5f65eSRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 2954fe5f65eSRob Clark 2964fe5f65eSRob Clark for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { 297667ce33eSRob Clark msm_gem_unmap_vma(priv->aspace[id], 298667ce33eSRob Clark &msm_obj->domain[id], msm_obj->sgt); 2994fe5f65eSRob Clark } 3004fe5f65eSRob Clark } 3014fe5f65eSRob Clark 302c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 303c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 304c8afe684SRob Clark * iova ref if you know one is already held. 305c8afe684SRob Clark * 306c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 307c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 308c8afe684SRob Clark */ 309c8afe684SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, 31078babc16SRob Clark uint64_t *iova) 311c8afe684SRob Clark { 312c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 313c8afe684SRob Clark int ret = 0; 314c8afe684SRob Clark 315c8afe684SRob Clark if (!msm_obj->domain[id].iova) { 316c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 317871d812aSRob Clark struct page **pages = get_pages(obj); 318871d812aSRob Clark 319c8afe684SRob Clark if (IS_ERR(pages)) 320c8afe684SRob Clark return PTR_ERR(pages); 321871d812aSRob Clark 322871d812aSRob Clark if (iommu_present(&platform_bus_type)) { 323667ce33eSRob Clark ret = msm_gem_map_vma(priv->aspace[id], &msm_obj->domain[id], 324667ce33eSRob Clark msm_obj->sgt, obj->size >> PAGE_SHIFT); 325871d812aSRob Clark } else { 326871d812aSRob Clark msm_obj->domain[id].iova = physaddr(obj); 327871d812aSRob Clark } 328c8afe684SRob Clark } 329c8afe684SRob Clark 330c8afe684SRob Clark if (!ret) 331c8afe684SRob Clark *iova = msm_obj->domain[id].iova; 332c8afe684SRob Clark 333c8afe684SRob Clark return ret; 334c8afe684SRob Clark } 335c8afe684SRob Clark 3362638d90aSRob Clark /* get iova, taking a reference. Should have a matching put */ 33778babc16SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint64_t *iova) 338c8afe684SRob Clark { 339edd4fc63SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 340c8afe684SRob Clark int ret; 341edd4fc63SRob Clark 342edd4fc63SRob Clark /* this is safe right now because we don't unmap until the 343edd4fc63SRob Clark * bo is deleted: 344edd4fc63SRob Clark */ 345edd4fc63SRob Clark if (msm_obj->domain[id].iova) { 346edd4fc63SRob Clark *iova = msm_obj->domain[id].iova; 347edd4fc63SRob Clark return 0; 348edd4fc63SRob Clark } 349edd4fc63SRob Clark 350c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 351c8afe684SRob Clark ret = msm_gem_get_iova_locked(obj, id, iova); 352c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 353c8afe684SRob Clark return ret; 354c8afe684SRob Clark } 355c8afe684SRob Clark 3562638d90aSRob Clark /* get iova without taking a reference, used in places where you have 3572638d90aSRob Clark * already done a 'msm_gem_get_iova()'. 3582638d90aSRob Clark */ 35978babc16SRob Clark uint64_t msm_gem_iova(struct drm_gem_object *obj, int id) 3602638d90aSRob Clark { 3612638d90aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3622638d90aSRob Clark WARN_ON(!msm_obj->domain[id].iova); 3632638d90aSRob Clark return msm_obj->domain[id].iova; 3642638d90aSRob Clark } 3652638d90aSRob Clark 366c8afe684SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, int id) 367c8afe684SRob Clark { 368c8afe684SRob Clark // XXX TODO .. 369c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 370c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 371c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 372c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 373c8afe684SRob Clark // things that are no longer needed.. 374c8afe684SRob Clark } 375c8afe684SRob Clark 376c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 377c8afe684SRob Clark struct drm_mode_create_dumb *args) 378c8afe684SRob Clark { 379c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 380c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 381c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 382c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 383c8afe684SRob Clark } 384c8afe684SRob Clark 385c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 386c8afe684SRob Clark uint32_t handle, uint64_t *offset) 387c8afe684SRob Clark { 388c8afe684SRob Clark struct drm_gem_object *obj; 389c8afe684SRob Clark int ret = 0; 390c8afe684SRob Clark 391c8afe684SRob Clark /* GEM does all our handle to object mapping */ 392a8ad0bd8SChris Wilson obj = drm_gem_object_lookup(file, handle); 393c8afe684SRob Clark if (obj == NULL) { 394c8afe684SRob Clark ret = -ENOENT; 395c8afe684SRob Clark goto fail; 396c8afe684SRob Clark } 397c8afe684SRob Clark 398c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 399c8afe684SRob Clark 400c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 401c8afe684SRob Clark 402c8afe684SRob Clark fail: 403c8afe684SRob Clark return ret; 404c8afe684SRob Clark } 405c8afe684SRob Clark 40618f23049SRob Clark void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj) 407c8afe684SRob Clark { 408c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 409c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 410c8afe684SRob Clark if (!msm_obj->vaddr) { 411c8afe684SRob Clark struct page **pages = get_pages(obj); 412c8afe684SRob Clark if (IS_ERR(pages)) 413c8afe684SRob Clark return ERR_CAST(pages); 414c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 415c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 41669a834c2SRob Clark if (msm_obj->vaddr == NULL) 41769a834c2SRob Clark return ERR_PTR(-ENOMEM); 418c8afe684SRob Clark } 419e1e9db2cSRob Clark msm_obj->vmap_count++; 420c8afe684SRob Clark return msm_obj->vaddr; 421c8afe684SRob Clark } 422c8afe684SRob Clark 42318f23049SRob Clark void *msm_gem_get_vaddr(struct drm_gem_object *obj) 424c8afe684SRob Clark { 425c8afe684SRob Clark void *ret; 426c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 42718f23049SRob Clark ret = msm_gem_get_vaddr_locked(obj); 428c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 429c8afe684SRob Clark return ret; 430c8afe684SRob Clark } 431c8afe684SRob Clark 43218f23049SRob Clark void msm_gem_put_vaddr_locked(struct drm_gem_object *obj) 43318f23049SRob Clark { 434e1e9db2cSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 43518f23049SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 436e1e9db2cSRob Clark WARN_ON(msm_obj->vmap_count < 1); 437e1e9db2cSRob Clark msm_obj->vmap_count--; 43818f23049SRob Clark } 43918f23049SRob Clark 44018f23049SRob Clark void msm_gem_put_vaddr(struct drm_gem_object *obj) 44118f23049SRob Clark { 442e1e9db2cSRob Clark mutex_lock(&obj->dev->struct_mutex); 443e1e9db2cSRob Clark msm_gem_put_vaddr_locked(obj); 444e1e9db2cSRob Clark mutex_unlock(&obj->dev->struct_mutex); 44518f23049SRob Clark } 44618f23049SRob Clark 4474cd33c48SRob Clark /* Update madvise status, returns true if not purged, else 4484cd33c48SRob Clark * false or -errno. 4494cd33c48SRob Clark */ 4504cd33c48SRob Clark int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) 4514cd33c48SRob Clark { 4524cd33c48SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4534cd33c48SRob Clark 4544cd33c48SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 4554cd33c48SRob Clark 4564cd33c48SRob Clark if (msm_obj->madv != __MSM_MADV_PURGED) 4574cd33c48SRob Clark msm_obj->madv = madv; 4584cd33c48SRob Clark 4594cd33c48SRob Clark return (msm_obj->madv != __MSM_MADV_PURGED); 4604cd33c48SRob Clark } 4614cd33c48SRob Clark 46268209390SRob Clark void msm_gem_purge(struct drm_gem_object *obj) 46368209390SRob Clark { 46468209390SRob Clark struct drm_device *dev = obj->dev; 46568209390SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 46668209390SRob Clark 46768209390SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 46868209390SRob Clark WARN_ON(!is_purgeable(msm_obj)); 46968209390SRob Clark WARN_ON(obj->import_attach); 47068209390SRob Clark 47168209390SRob Clark put_iova(obj); 47268209390SRob Clark 473e1e9db2cSRob Clark msm_gem_vunmap(obj); 47468209390SRob Clark 47568209390SRob Clark put_pages(obj); 47668209390SRob Clark 47768209390SRob Clark msm_obj->madv = __MSM_MADV_PURGED; 47868209390SRob Clark 47968209390SRob Clark drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 48068209390SRob Clark drm_gem_free_mmap_offset(obj); 48168209390SRob Clark 48268209390SRob Clark /* Our goal here is to return as much of the memory as 48368209390SRob Clark * is possible back to the system as we are called from OOM. 48468209390SRob Clark * To do this we must instruct the shmfs to drop all of its 48568209390SRob Clark * backing pages, *now*. 48668209390SRob Clark */ 48768209390SRob Clark shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); 48868209390SRob Clark 48968209390SRob Clark invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 49068209390SRob Clark 0, (loff_t)-1); 49168209390SRob Clark } 49268209390SRob Clark 493e1e9db2cSRob Clark void msm_gem_vunmap(struct drm_gem_object *obj) 494e1e9db2cSRob Clark { 495e1e9db2cSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 496e1e9db2cSRob Clark 497e1e9db2cSRob Clark if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj))) 498e1e9db2cSRob Clark return; 499e1e9db2cSRob Clark 500e1e9db2cSRob Clark vunmap(msm_obj->vaddr); 501e1e9db2cSRob Clark msm_obj->vaddr = NULL; 502e1e9db2cSRob Clark } 503e1e9db2cSRob Clark 504b6295f9aSRob Clark /* must be called before _move_to_active().. */ 505b6295f9aSRob Clark int msm_gem_sync_object(struct drm_gem_object *obj, 506b6295f9aSRob Clark struct msm_fence_context *fctx, bool exclusive) 507b6295f9aSRob Clark { 508b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 509b6295f9aSRob Clark struct reservation_object_list *fobj; 510f54d1867SChris Wilson struct dma_fence *fence; 511b6295f9aSRob Clark int i, ret; 512b6295f9aSRob Clark 513b6295f9aSRob Clark if (!exclusive) { 514b6295f9aSRob Clark /* NOTE: _reserve_shared() must happen before _add_shared_fence(), 515b6295f9aSRob Clark * which makes this a slightly strange place to call it. OTOH this 516b6295f9aSRob Clark * is a convenient can-fail point to hook it in. (And similar to 517b6295f9aSRob Clark * how etnaviv and nouveau handle this.) 518b6295f9aSRob Clark */ 519b6295f9aSRob Clark ret = reservation_object_reserve_shared(msm_obj->resv); 520b6295f9aSRob Clark if (ret) 521b6295f9aSRob Clark return ret; 522b6295f9aSRob Clark } 523b6295f9aSRob Clark 524b6295f9aSRob Clark fobj = reservation_object_get_list(msm_obj->resv); 525b6295f9aSRob Clark if (!fobj || (fobj->shared_count == 0)) { 526b6295f9aSRob Clark fence = reservation_object_get_excl(msm_obj->resv); 527b6295f9aSRob Clark /* don't need to wait on our own fences, since ring is fifo */ 528b6295f9aSRob Clark if (fence && (fence->context != fctx->context)) { 529f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 530b6295f9aSRob Clark if (ret) 531b6295f9aSRob Clark return ret; 532b6295f9aSRob Clark } 533b6295f9aSRob Clark } 534b6295f9aSRob Clark 535b6295f9aSRob Clark if (!exclusive || !fobj) 536b6295f9aSRob Clark return 0; 537b6295f9aSRob Clark 538b6295f9aSRob Clark for (i = 0; i < fobj->shared_count; i++) { 539b6295f9aSRob Clark fence = rcu_dereference_protected(fobj->shared[i], 540b6295f9aSRob Clark reservation_object_held(msm_obj->resv)); 541b6295f9aSRob Clark if (fence->context != fctx->context) { 542f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 543b6295f9aSRob Clark if (ret) 544b6295f9aSRob Clark return ret; 545b6295f9aSRob Clark } 546b6295f9aSRob Clark } 547b6295f9aSRob Clark 548b6295f9aSRob Clark return 0; 549b6295f9aSRob Clark } 550b6295f9aSRob Clark 5517198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 552f54d1867SChris Wilson struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence) 5537198e6b0SRob Clark { 5547198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 5554cd33c48SRob Clark WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); 5567198e6b0SRob Clark msm_obj->gpu = gpu; 557b6295f9aSRob Clark if (exclusive) 558b6295f9aSRob Clark reservation_object_add_excl_fence(msm_obj->resv, fence); 559bf6811f3SRob Clark else 560b6295f9aSRob Clark reservation_object_add_shared_fence(msm_obj->resv, fence); 5617198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 5627198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 5637198e6b0SRob Clark } 5647198e6b0SRob Clark 5657198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 5667198e6b0SRob Clark { 5677198e6b0SRob Clark struct drm_device *dev = obj->dev; 5687198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 5697198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 5707198e6b0SRob Clark 5717198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 5727198e6b0SRob Clark 5737198e6b0SRob Clark msm_obj->gpu = NULL; 5747198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 5757198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 5767198e6b0SRob Clark } 5777198e6b0SRob Clark 578ba00c3f2SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 579ba00c3f2SRob Clark { 580b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 581b6295f9aSRob Clark bool write = !!(op & MSM_PREP_WRITE); 582f755e227SChris Wilson unsigned long remain = 583f755e227SChris Wilson op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); 584f755e227SChris Wilson long ret; 585b6295f9aSRob Clark 586b6295f9aSRob Clark ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, 587f755e227SChris Wilson true, remain); 588f755e227SChris Wilson if (ret == 0) 589f755e227SChris Wilson return remain == 0 ? -EBUSY : -ETIMEDOUT; 590f755e227SChris Wilson else if (ret < 0) 591f755e227SChris Wilson return ret; 592ba00c3f2SRob Clark 5937198e6b0SRob Clark /* TODO cache maintenance */ 5947198e6b0SRob Clark 595b6295f9aSRob Clark return 0; 5967198e6b0SRob Clark } 5977198e6b0SRob Clark 5987198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 5997198e6b0SRob Clark { 6007198e6b0SRob Clark /* TODO cache maintenance */ 601c8afe684SRob Clark return 0; 602c8afe684SRob Clark } 603c8afe684SRob Clark 604c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 605f54d1867SChris Wilson static void describe_fence(struct dma_fence *fence, const char *type, 606b6295f9aSRob Clark struct seq_file *m) 607b6295f9aSRob Clark { 608f54d1867SChris Wilson if (!dma_fence_is_signaled(fence)) 609b6295f9aSRob Clark seq_printf(m, "\t%9s: %s %s seq %u\n", type, 610b6295f9aSRob Clark fence->ops->get_driver_name(fence), 611b6295f9aSRob Clark fence->ops->get_timeline_name(fence), 612b6295f9aSRob Clark fence->seqno); 613b6295f9aSRob Clark } 614b6295f9aSRob Clark 615c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 616c8afe684SRob Clark { 617c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 618b6295f9aSRob Clark struct reservation_object *robj = msm_obj->resv; 619b6295f9aSRob Clark struct reservation_object_list *fobj; 620667ce33eSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 621f54d1867SChris Wilson struct dma_fence *fence; 622c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 6234cd33c48SRob Clark const char *madv; 624667ce33eSRob Clark unsigned id; 625c8afe684SRob Clark 626b6295f9aSRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 627b6295f9aSRob Clark 6284cd33c48SRob Clark switch (msm_obj->madv) { 6294cd33c48SRob Clark case __MSM_MADV_PURGED: 6304cd33c48SRob Clark madv = " purged"; 6314cd33c48SRob Clark break; 6324cd33c48SRob Clark case MSM_MADV_DONTNEED: 6334cd33c48SRob Clark madv = " purgeable"; 6344cd33c48SRob Clark break; 6354cd33c48SRob Clark case MSM_MADV_WILLNEED: 6364cd33c48SRob Clark default: 6374cd33c48SRob Clark madv = ""; 6384cd33c48SRob Clark break; 6394cd33c48SRob Clark } 6404cd33c48SRob Clark 641667ce33eSRob Clark seq_printf(m, "%08x: %c %2d (%2d) %08llx %p\t", 6427198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 643bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 644667ce33eSRob Clark off, msm_obj->vaddr); 645667ce33eSRob Clark 646667ce33eSRob Clark for (id = 0; id < priv->num_aspaces; id++) 647667ce33eSRob Clark seq_printf(m, " %08llx", msm_obj->domain[id].iova); 648667ce33eSRob Clark 649667ce33eSRob Clark seq_printf(m, " %zu%s\n", obj->size, madv); 650b6295f9aSRob Clark 651b6295f9aSRob Clark rcu_read_lock(); 652b6295f9aSRob Clark fobj = rcu_dereference(robj->fence); 653b6295f9aSRob Clark if (fobj) { 654b6295f9aSRob Clark unsigned int i, shared_count = fobj->shared_count; 655b6295f9aSRob Clark 656b6295f9aSRob Clark for (i = 0; i < shared_count; i++) { 657b6295f9aSRob Clark fence = rcu_dereference(fobj->shared[i]); 658b6295f9aSRob Clark describe_fence(fence, "Shared", m); 659b6295f9aSRob Clark } 660b6295f9aSRob Clark } 661b6295f9aSRob Clark 662b6295f9aSRob Clark fence = rcu_dereference(robj->fence_excl); 663b6295f9aSRob Clark if (fence) 664b6295f9aSRob Clark describe_fence(fence, "Exclusive", m); 665b6295f9aSRob Clark rcu_read_unlock(); 666c8afe684SRob Clark } 667c8afe684SRob Clark 668c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 669c8afe684SRob Clark { 670c8afe684SRob Clark struct msm_gem_object *msm_obj; 671c8afe684SRob Clark int count = 0; 672c8afe684SRob Clark size_t size = 0; 673c8afe684SRob Clark 674c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 675c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 676c8afe684SRob Clark seq_printf(m, " "); 677c8afe684SRob Clark msm_gem_describe(obj, m); 678c8afe684SRob Clark count++; 679c8afe684SRob Clark size += obj->size; 680c8afe684SRob Clark } 681c8afe684SRob Clark 682c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 683c8afe684SRob Clark } 684c8afe684SRob Clark #endif 685c8afe684SRob Clark 686c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 687c8afe684SRob Clark { 688c8afe684SRob Clark struct drm_device *dev = obj->dev; 689c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 690c8afe684SRob Clark 691c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 692c8afe684SRob Clark 6937198e6b0SRob Clark /* object should not be on active list: */ 6947198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 6957198e6b0SRob Clark 696c8afe684SRob Clark list_del(&msm_obj->mm_list); 697c8afe684SRob Clark 6984fe5f65eSRob Clark put_iova(obj); 699c8afe684SRob Clark 70005b84911SRob Clark if (obj->import_attach) { 70105b84911SRob Clark if (msm_obj->vaddr) 70205b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 70305b84911SRob Clark 70405b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 70505b84911SRob Clark * ours, just free the array we allocated: 70605b84911SRob Clark */ 70705b84911SRob Clark if (msm_obj->pages) 70805b84911SRob Clark drm_free_large(msm_obj->pages); 70905b84911SRob Clark 710f28730c8Sjilai wang drm_prime_gem_destroy(obj, msm_obj->sgt); 71105b84911SRob Clark } else { 712e1e9db2cSRob Clark msm_gem_vunmap(obj); 713c8afe684SRob Clark put_pages(obj); 71405b84911SRob Clark } 715c8afe684SRob Clark 7167198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 7177198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 7187198e6b0SRob Clark 719c8afe684SRob Clark drm_gem_object_release(obj); 720c8afe684SRob Clark 721c8afe684SRob Clark kfree(msm_obj); 722c8afe684SRob Clark } 723c8afe684SRob Clark 724c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 725c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 726c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 727c8afe684SRob Clark { 728c8afe684SRob Clark struct drm_gem_object *obj; 729c8afe684SRob Clark int ret; 730c8afe684SRob Clark 731c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 732c8afe684SRob Clark if (ret) 733c8afe684SRob Clark return ret; 734c8afe684SRob Clark 735c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 736c8afe684SRob Clark 737c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 738c8afe684SRob Clark 739c8afe684SRob Clark if (IS_ERR(obj)) 740c8afe684SRob Clark return PTR_ERR(obj); 741c8afe684SRob Clark 742c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 743c8afe684SRob Clark 744c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 745c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 746c8afe684SRob Clark 747c8afe684SRob Clark return ret; 748c8afe684SRob Clark } 749c8afe684SRob Clark 75005b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 75105b84911SRob Clark uint32_t size, uint32_t flags, 75279f0e202SRob Clark struct reservation_object *resv, 75305b84911SRob Clark struct drm_gem_object **obj) 754c8afe684SRob Clark { 755c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 756c8afe684SRob Clark struct msm_gem_object *msm_obj; 757072f1f91SRob Clark bool use_vram = false; 758c8afe684SRob Clark 759c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 760c8afe684SRob Clark case MSM_BO_UNCACHED: 761c8afe684SRob Clark case MSM_BO_CACHED: 762c8afe684SRob Clark case MSM_BO_WC: 763c8afe684SRob Clark break; 764c8afe684SRob Clark default: 765c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 766c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 76705b84911SRob Clark return -EINVAL; 768c8afe684SRob Clark } 769c8afe684SRob Clark 770871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 771072f1f91SRob Clark use_vram = true; 772072f1f91SRob Clark else if ((flags & MSM_BO_STOLEN) && priv->vram.size) 773072f1f91SRob Clark use_vram = true; 774072f1f91SRob Clark 775072f1f91SRob Clark if (WARN_ON(use_vram && !priv->vram.size)) 776072f1f91SRob Clark return -EINVAL; 777072f1f91SRob Clark 778667ce33eSRob Clark msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 77905b84911SRob Clark if (!msm_obj) 78005b84911SRob Clark return -ENOMEM; 781c8afe684SRob Clark 782072f1f91SRob Clark if (use_vram) 783667ce33eSRob Clark msm_obj->vram_node = &msm_obj->domain[0].node; 784871d812aSRob Clark 785c8afe684SRob Clark msm_obj->flags = flags; 7864cd33c48SRob Clark msm_obj->madv = MSM_MADV_WILLNEED; 787c8afe684SRob Clark 78879f0e202SRob Clark if (resv) { 78979f0e202SRob Clark msm_obj->resv = resv; 79079f0e202SRob Clark } else { 7917198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 7927198e6b0SRob Clark reservation_object_init(msm_obj->resv); 79379f0e202SRob Clark } 794c8afe684SRob Clark 7957198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 796c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 797c8afe684SRob Clark 79805b84911SRob Clark *obj = &msm_obj->base; 79905b84911SRob Clark 80005b84911SRob Clark return 0; 80105b84911SRob Clark } 80205b84911SRob Clark 80305b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 80405b84911SRob Clark uint32_t size, uint32_t flags) 80505b84911SRob Clark { 806871d812aSRob Clark struct drm_gem_object *obj = NULL; 80705b84911SRob Clark int ret; 80805b84911SRob Clark 80905b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 81005b84911SRob Clark 81105b84911SRob Clark size = PAGE_ALIGN(size); 81205b84911SRob Clark 81379f0e202SRob Clark ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); 81405b84911SRob Clark if (ret) 81505b84911SRob Clark goto fail; 81605b84911SRob Clark 817072f1f91SRob Clark if (use_pages(obj)) { 81805b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 81905b84911SRob Clark if (ret) 82005b84911SRob Clark goto fail; 821871d812aSRob Clark } else { 822871d812aSRob Clark drm_gem_private_object_init(dev, obj, size); 823871d812aSRob Clark } 82405b84911SRob Clark 82505b84911SRob Clark return obj; 82605b84911SRob Clark 82705b84911SRob Clark fail: 8289999f105SRob Clark drm_gem_object_unreference(obj); 82905b84911SRob Clark return ERR_PTR(ret); 83005b84911SRob Clark } 83105b84911SRob Clark 83205b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 83379f0e202SRob Clark struct dma_buf *dmabuf, struct sg_table *sgt) 83405b84911SRob Clark { 83505b84911SRob Clark struct msm_gem_object *msm_obj; 83605b84911SRob Clark struct drm_gem_object *obj; 83779f0e202SRob Clark uint32_t size; 83805b84911SRob Clark int ret, npages; 83905b84911SRob Clark 840871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 841871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 842871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 843871d812aSRob Clark return ERR_PTR(-EINVAL); 844871d812aSRob Clark } 845871d812aSRob Clark 84679f0e202SRob Clark size = PAGE_ALIGN(dmabuf->size); 84705b84911SRob Clark 84879f0e202SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj); 84905b84911SRob Clark if (ret) 85005b84911SRob Clark goto fail; 85105b84911SRob Clark 85205b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 85305b84911SRob Clark 85405b84911SRob Clark npages = size / PAGE_SIZE; 85505b84911SRob Clark 85605b84911SRob Clark msm_obj = to_msm_bo(obj); 85705b84911SRob Clark msm_obj->sgt = sgt; 85805b84911SRob Clark msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); 85905b84911SRob Clark if (!msm_obj->pages) { 86005b84911SRob Clark ret = -ENOMEM; 86105b84911SRob Clark goto fail; 86205b84911SRob Clark } 86305b84911SRob Clark 86405b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 86505b84911SRob Clark if (ret) 86605b84911SRob Clark goto fail; 86705b84911SRob Clark 868c8afe684SRob Clark return obj; 869c8afe684SRob Clark 870c8afe684SRob Clark fail: 871c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 872c8afe684SRob Clark return ERR_PTR(ret); 873c8afe684SRob Clark } 874