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> 21c8afe684SRob Clark 22c8afe684SRob Clark #include "msm_drv.h" 23c8afe684SRob Clark #include "msm_gem.h" 247198e6b0SRob Clark #include "msm_gpu.h" 25871d812aSRob Clark #include "msm_mmu.h" 26c8afe684SRob Clark 27871d812aSRob Clark static dma_addr_t physaddr(struct drm_gem_object *obj) 28871d812aSRob Clark { 29871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 30871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 31871d812aSRob Clark return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + 32871d812aSRob Clark priv->vram.paddr; 33871d812aSRob Clark } 34871d812aSRob Clark 35072f1f91SRob Clark static bool use_pages(struct drm_gem_object *obj) 36072f1f91SRob Clark { 37072f1f91SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 38072f1f91SRob Clark return !msm_obj->vram_node; 39072f1f91SRob Clark } 40072f1f91SRob Clark 41871d812aSRob Clark /* allocate pages from VRAM carveout, used when no IOMMU: */ 42871d812aSRob Clark static struct page **get_pages_vram(struct drm_gem_object *obj, 43871d812aSRob Clark int npages) 44871d812aSRob Clark { 45871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 46871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 47871d812aSRob Clark dma_addr_t paddr; 48871d812aSRob Clark struct page **p; 49871d812aSRob Clark int ret, i; 50871d812aSRob Clark 51871d812aSRob Clark p = drm_malloc_ab(npages, sizeof(struct page *)); 52871d812aSRob Clark if (!p) 53871d812aSRob Clark return ERR_PTR(-ENOMEM); 54871d812aSRob Clark 55871d812aSRob Clark ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, 56871d812aSRob Clark npages, 0, DRM_MM_SEARCH_DEFAULT); 57871d812aSRob Clark if (ret) { 58871d812aSRob Clark drm_free_large(p); 59871d812aSRob Clark return ERR_PTR(ret); 60871d812aSRob Clark } 61871d812aSRob Clark 62871d812aSRob Clark paddr = physaddr(obj); 63871d812aSRob Clark for (i = 0; i < npages; i++) { 64871d812aSRob Clark p[i] = phys_to_page(paddr); 65871d812aSRob Clark paddr += PAGE_SIZE; 66871d812aSRob Clark } 67871d812aSRob Clark 68871d812aSRob Clark return p; 69871d812aSRob Clark } 70c8afe684SRob Clark 71c8afe684SRob Clark /* called with dev->struct_mutex held */ 72c8afe684SRob Clark static struct page **get_pages(struct drm_gem_object *obj) 73c8afe684SRob Clark { 74c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 75c8afe684SRob Clark 76c8afe684SRob Clark if (!msm_obj->pages) { 77c8afe684SRob Clark struct drm_device *dev = obj->dev; 78871d812aSRob Clark struct page **p; 79c8afe684SRob Clark int npages = obj->size >> PAGE_SHIFT; 80c8afe684SRob Clark 81072f1f91SRob Clark if (use_pages(obj)) 820cdbe8acSDavid Herrmann p = drm_gem_get_pages(obj); 83871d812aSRob Clark else 84871d812aSRob Clark p = get_pages_vram(obj, npages); 85871d812aSRob Clark 86c8afe684SRob Clark if (IS_ERR(p)) { 87c8afe684SRob Clark dev_err(dev->dev, "could not get pages: %ld\n", 88c8afe684SRob Clark PTR_ERR(p)); 89c8afe684SRob Clark return p; 90c8afe684SRob Clark } 91c8afe684SRob Clark 92c8afe684SRob Clark msm_obj->sgt = drm_prime_pages_to_sg(p, npages); 931f70e079SWei Yongjun if (IS_ERR(msm_obj->sgt)) { 94c8afe684SRob Clark dev_err(dev->dev, "failed to allocate sgt\n"); 951f70e079SWei Yongjun return ERR_CAST(msm_obj->sgt); 96c8afe684SRob Clark } 97c8afe684SRob Clark 98c8afe684SRob Clark msm_obj->pages = p; 99c8afe684SRob Clark 100c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 101c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 102c8afe684SRob Clark */ 103c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 104c8afe684SRob Clark dma_map_sg(dev->dev, msm_obj->sgt->sgl, 105c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 106c8afe684SRob Clark } 107c8afe684SRob Clark 108c8afe684SRob Clark return msm_obj->pages; 109c8afe684SRob Clark } 110c8afe684SRob Clark 111c8afe684SRob Clark static void put_pages(struct drm_gem_object *obj) 112c8afe684SRob Clark { 113c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 114c8afe684SRob Clark 115c8afe684SRob Clark if (msm_obj->pages) { 116c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 117c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 118c8afe684SRob Clark */ 119c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 120c8afe684SRob Clark dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, 121c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 122c8afe684SRob Clark sg_free_table(msm_obj->sgt); 123c8afe684SRob Clark kfree(msm_obj->sgt); 124c8afe684SRob Clark 125072f1f91SRob Clark if (use_pages(obj)) 126c8afe684SRob Clark drm_gem_put_pages(obj, msm_obj->pages, true, false); 1271ffa2425SMicah Richert else { 128871d812aSRob Clark drm_mm_remove_node(msm_obj->vram_node); 1291ffa2425SMicah Richert drm_free_large(msm_obj->pages); 1301ffa2425SMicah Richert } 131871d812aSRob Clark 132c8afe684SRob Clark msm_obj->pages = NULL; 133c8afe684SRob Clark } 134c8afe684SRob Clark } 135c8afe684SRob Clark 13605b84911SRob Clark struct page **msm_gem_get_pages(struct drm_gem_object *obj) 13705b84911SRob Clark { 13805b84911SRob Clark struct drm_device *dev = obj->dev; 13905b84911SRob Clark struct page **p; 14005b84911SRob Clark mutex_lock(&dev->struct_mutex); 14105b84911SRob Clark p = get_pages(obj); 14205b84911SRob Clark mutex_unlock(&dev->struct_mutex); 14305b84911SRob Clark return p; 14405b84911SRob Clark } 14505b84911SRob Clark 14605b84911SRob Clark void msm_gem_put_pages(struct drm_gem_object *obj) 14705b84911SRob Clark { 14805b84911SRob Clark /* when we start tracking the pin count, then do something here */ 14905b84911SRob Clark } 15005b84911SRob Clark 151c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 152c8afe684SRob Clark struct vm_area_struct *vma) 153c8afe684SRob Clark { 154c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 155c8afe684SRob Clark 156c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 157c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 158c8afe684SRob Clark 159c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 160c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 161c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 162c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 163c8afe684SRob Clark } else { 164c8afe684SRob Clark /* 165c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 166c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 167c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 168c8afe684SRob Clark */ 169c8afe684SRob Clark fput(vma->vm_file); 170c8afe684SRob Clark get_file(obj->filp); 171c8afe684SRob Clark vma->vm_pgoff = 0; 172c8afe684SRob Clark vma->vm_file = obj->filp; 173c8afe684SRob Clark 174c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 175c8afe684SRob Clark } 176c8afe684SRob Clark 177c8afe684SRob Clark return 0; 178c8afe684SRob Clark } 179c8afe684SRob Clark 180c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 181c8afe684SRob Clark { 182c8afe684SRob Clark int ret; 183c8afe684SRob Clark 184c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 185c8afe684SRob Clark if (ret) { 186c8afe684SRob Clark DBG("mmap failed: %d", ret); 187c8afe684SRob Clark return ret; 188c8afe684SRob Clark } 189c8afe684SRob Clark 190c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 191c8afe684SRob Clark } 192c8afe684SRob Clark 193c8afe684SRob Clark int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 194c8afe684SRob Clark { 195c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 196c8afe684SRob Clark struct drm_device *dev = obj->dev; 197c8afe684SRob Clark struct page **pages; 198c8afe684SRob Clark unsigned long pfn; 199c8afe684SRob Clark pgoff_t pgoff; 200c8afe684SRob Clark int ret; 201c8afe684SRob Clark 202c8afe684SRob Clark /* Make sure we don't parallel update on a fault, nor move or remove 203c8afe684SRob Clark * something from beneath our feet 204c8afe684SRob Clark */ 205c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 206c8afe684SRob Clark if (ret) 207c8afe684SRob Clark goto out; 208c8afe684SRob Clark 209c8afe684SRob Clark /* make sure we have pages attached now */ 210c8afe684SRob Clark pages = get_pages(obj); 211c8afe684SRob Clark if (IS_ERR(pages)) { 212c8afe684SRob Clark ret = PTR_ERR(pages); 213c8afe684SRob Clark goto out_unlock; 214c8afe684SRob Clark } 215c8afe684SRob Clark 216c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 217c8afe684SRob Clark pgoff = ((unsigned long)vmf->virtual_address - 218c8afe684SRob Clark vma->vm_start) >> PAGE_SHIFT; 219c8afe684SRob Clark 220871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 221c8afe684SRob Clark 222c8afe684SRob Clark VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, 223c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 224c8afe684SRob Clark 225c8afe684SRob Clark ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn); 226c8afe684SRob Clark 227c8afe684SRob Clark out_unlock: 228c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 229c8afe684SRob Clark out: 230c8afe684SRob Clark switch (ret) { 231c8afe684SRob Clark case -EAGAIN: 232c8afe684SRob Clark case 0: 233c8afe684SRob Clark case -ERESTARTSYS: 234c8afe684SRob Clark case -EINTR: 235505886d5SRob Clark case -EBUSY: 236505886d5SRob Clark /* 237505886d5SRob Clark * EBUSY is ok: this just means that another thread 238505886d5SRob Clark * already did the job. 239505886d5SRob Clark */ 240c8afe684SRob Clark return VM_FAULT_NOPAGE; 241c8afe684SRob Clark case -ENOMEM: 242c8afe684SRob Clark return VM_FAULT_OOM; 243c8afe684SRob Clark default: 244c8afe684SRob Clark return VM_FAULT_SIGBUS; 245c8afe684SRob Clark } 246c8afe684SRob Clark } 247c8afe684SRob Clark 248c8afe684SRob Clark /** get mmap offset */ 249c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 250c8afe684SRob Clark { 251c8afe684SRob Clark struct drm_device *dev = obj->dev; 252c8afe684SRob Clark int ret; 253c8afe684SRob Clark 254c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 255c8afe684SRob Clark 256c8afe684SRob Clark /* Make it mmapable */ 257c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 258c8afe684SRob Clark 259c8afe684SRob Clark if (ret) { 260c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 261c8afe684SRob Clark return 0; 262c8afe684SRob Clark } 263c8afe684SRob Clark 264c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 265c8afe684SRob Clark } 266c8afe684SRob Clark 267c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 268c8afe684SRob Clark { 269c8afe684SRob Clark uint64_t offset; 270c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 271c8afe684SRob Clark offset = mmap_offset(obj); 272c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 273c8afe684SRob Clark return offset; 274c8afe684SRob Clark } 275c8afe684SRob Clark 276c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 277c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 278c8afe684SRob Clark * iova ref if you know one is already held. 279c8afe684SRob Clark * 280c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 281c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 282c8afe684SRob Clark */ 283c8afe684SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, 284c8afe684SRob Clark uint32_t *iova) 285c8afe684SRob Clark { 286c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 287c8afe684SRob Clark int ret = 0; 288c8afe684SRob Clark 289c8afe684SRob Clark if (!msm_obj->domain[id].iova) { 290c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 291871d812aSRob Clark struct page **pages = get_pages(obj); 292871d812aSRob Clark 293c8afe684SRob Clark if (IS_ERR(pages)) 294c8afe684SRob Clark return PTR_ERR(pages); 295871d812aSRob Clark 296871d812aSRob Clark if (iommu_present(&platform_bus_type)) { 2971c4997feSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 2981c4997feSRob Clark uint32_t offset; 2991c4997feSRob Clark 3001c4997feSRob Clark if (WARN_ON(!mmu)) 3011c4997feSRob Clark return -EINVAL; 3021c4997feSRob Clark 3031c4997feSRob Clark offset = (uint32_t)mmap_offset(obj); 304871d812aSRob Clark ret = mmu->funcs->map(mmu, offset, msm_obj->sgt, 305c8afe684SRob Clark obj->size, IOMMU_READ | IOMMU_WRITE); 306c8afe684SRob Clark msm_obj->domain[id].iova = offset; 307871d812aSRob Clark } else { 308871d812aSRob Clark msm_obj->domain[id].iova = physaddr(obj); 309871d812aSRob Clark } 310c8afe684SRob Clark } 311c8afe684SRob Clark 312c8afe684SRob Clark if (!ret) 313c8afe684SRob Clark *iova = msm_obj->domain[id].iova; 314c8afe684SRob Clark 315c8afe684SRob Clark return ret; 316c8afe684SRob Clark } 317c8afe684SRob Clark 3182638d90aSRob Clark /* get iova, taking a reference. Should have a matching put */ 319c8afe684SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) 320c8afe684SRob Clark { 321edd4fc63SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 322c8afe684SRob Clark int ret; 323edd4fc63SRob Clark 324edd4fc63SRob Clark /* this is safe right now because we don't unmap until the 325edd4fc63SRob Clark * bo is deleted: 326edd4fc63SRob Clark */ 327edd4fc63SRob Clark if (msm_obj->domain[id].iova) { 328edd4fc63SRob Clark *iova = msm_obj->domain[id].iova; 329edd4fc63SRob Clark return 0; 330edd4fc63SRob Clark } 331edd4fc63SRob Clark 332c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 333c8afe684SRob Clark ret = msm_gem_get_iova_locked(obj, id, iova); 334c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 335c8afe684SRob Clark return ret; 336c8afe684SRob Clark } 337c8afe684SRob Clark 3382638d90aSRob Clark /* get iova without taking a reference, used in places where you have 3392638d90aSRob Clark * already done a 'msm_gem_get_iova()'. 3402638d90aSRob Clark */ 3412638d90aSRob Clark uint32_t msm_gem_iova(struct drm_gem_object *obj, int id) 3422638d90aSRob Clark { 3432638d90aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3442638d90aSRob Clark WARN_ON(!msm_obj->domain[id].iova); 3452638d90aSRob Clark return msm_obj->domain[id].iova; 3462638d90aSRob Clark } 3472638d90aSRob Clark 348c8afe684SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, int id) 349c8afe684SRob Clark { 350c8afe684SRob Clark // XXX TODO .. 351c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 352c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 353c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 354c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 355c8afe684SRob Clark // things that are no longer needed.. 356c8afe684SRob Clark } 357c8afe684SRob Clark 358c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 359c8afe684SRob Clark struct drm_mode_create_dumb *args) 360c8afe684SRob Clark { 361c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 362c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 363c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 364c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 365c8afe684SRob Clark } 366c8afe684SRob Clark 367c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 368c8afe684SRob Clark uint32_t handle, uint64_t *offset) 369c8afe684SRob Clark { 370c8afe684SRob Clark struct drm_gem_object *obj; 371c8afe684SRob Clark int ret = 0; 372c8afe684SRob Clark 373c8afe684SRob Clark /* GEM does all our handle to object mapping */ 374c8afe684SRob Clark obj = drm_gem_object_lookup(dev, file, handle); 375c8afe684SRob Clark if (obj == NULL) { 376c8afe684SRob Clark ret = -ENOENT; 377c8afe684SRob Clark goto fail; 378c8afe684SRob Clark } 379c8afe684SRob Clark 380c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 381c8afe684SRob Clark 382c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 383c8afe684SRob Clark 384c8afe684SRob Clark fail: 385c8afe684SRob Clark return ret; 386c8afe684SRob Clark } 387c8afe684SRob Clark 388c8afe684SRob Clark void *msm_gem_vaddr_locked(struct drm_gem_object *obj) 389c8afe684SRob Clark { 390c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 391c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 392c8afe684SRob Clark if (!msm_obj->vaddr) { 393c8afe684SRob Clark struct page **pages = get_pages(obj); 394c8afe684SRob Clark if (IS_ERR(pages)) 395c8afe684SRob Clark return ERR_CAST(pages); 396c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 397c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 398c8afe684SRob Clark } 399c8afe684SRob Clark return msm_obj->vaddr; 400c8afe684SRob Clark } 401c8afe684SRob Clark 402c8afe684SRob Clark void *msm_gem_vaddr(struct drm_gem_object *obj) 403c8afe684SRob Clark { 404c8afe684SRob Clark void *ret; 405c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 406c8afe684SRob Clark ret = msm_gem_vaddr_locked(obj); 407c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 408c8afe684SRob Clark return ret; 409c8afe684SRob Clark } 410c8afe684SRob Clark 411edd4fc63SRob Clark /* setup callback for when bo is no longer busy.. 412edd4fc63SRob Clark * TODO probably want to differentiate read vs write.. 413edd4fc63SRob Clark */ 414edd4fc63SRob Clark int msm_gem_queue_inactive_cb(struct drm_gem_object *obj, 415edd4fc63SRob Clark struct msm_fence_cb *cb) 416c8afe684SRob Clark { 4177198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 41869193e50SRob Clark uint32_t fence = msm_gem_fence(msm_obj, 41969193e50SRob Clark MSM_PREP_READ | MSM_PREP_WRITE); 42069193e50SRob Clark return msm_queue_fence_cb(obj->dev, cb, fence); 4217198e6b0SRob Clark } 4227198e6b0SRob Clark 4237198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 424bf6811f3SRob Clark struct msm_gpu *gpu, bool write, uint32_t fence) 4257198e6b0SRob Clark { 4267198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4277198e6b0SRob Clark msm_obj->gpu = gpu; 428bf6811f3SRob Clark if (write) 429bf6811f3SRob Clark msm_obj->write_fence = fence; 430bf6811f3SRob Clark else 431bf6811f3SRob Clark msm_obj->read_fence = fence; 4327198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4337198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 4347198e6b0SRob Clark } 4357198e6b0SRob Clark 4367198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 4377198e6b0SRob Clark { 4387198e6b0SRob Clark struct drm_device *dev = obj->dev; 4397198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 4407198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4417198e6b0SRob Clark 4427198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 4437198e6b0SRob Clark 4447198e6b0SRob Clark msm_obj->gpu = NULL; 445bf6811f3SRob Clark msm_obj->read_fence = 0; 446bf6811f3SRob Clark msm_obj->write_fence = 0; 4477198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4487198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 4497198e6b0SRob Clark } 4507198e6b0SRob Clark 4517198e6b0SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, 4527198e6b0SRob Clark struct timespec *timeout) 4537198e6b0SRob Clark { 4547198e6b0SRob Clark struct drm_device *dev = obj->dev; 4557198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4567198e6b0SRob Clark int ret = 0; 4577198e6b0SRob Clark 458f816f272SRob Clark if (is_active(msm_obj)) { 45969193e50SRob Clark uint32_t fence = msm_gem_fence(msm_obj, op); 460f816f272SRob Clark 461f816f272SRob Clark if (op & MSM_PREP_NOSYNC) 462f816f272SRob Clark timeout = NULL; 463f816f272SRob Clark 464bf6811f3SRob Clark ret = msm_wait_fence_interruptable(dev, fence, timeout); 465bf6811f3SRob Clark } 4667198e6b0SRob Clark 4677198e6b0SRob Clark /* TODO cache maintenance */ 4687198e6b0SRob Clark 4697198e6b0SRob Clark return ret; 4707198e6b0SRob Clark } 4717198e6b0SRob Clark 4727198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 4737198e6b0SRob Clark { 4747198e6b0SRob Clark /* TODO cache maintenance */ 475c8afe684SRob Clark return 0; 476c8afe684SRob Clark } 477c8afe684SRob Clark 478c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 479c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 480c8afe684SRob Clark { 481c8afe684SRob Clark struct drm_device *dev = obj->dev; 482c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 483c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 484c8afe684SRob Clark 485c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 486bf6811f3SRob Clark seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %d\n", 4877198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 488bf6811f3SRob Clark msm_obj->read_fence, msm_obj->write_fence, 489bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 490c8afe684SRob Clark off, msm_obj->vaddr, obj->size); 491c8afe684SRob Clark } 492c8afe684SRob Clark 493c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 494c8afe684SRob Clark { 495c8afe684SRob Clark struct msm_gem_object *msm_obj; 496c8afe684SRob Clark int count = 0; 497c8afe684SRob Clark size_t size = 0; 498c8afe684SRob Clark 499c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 500c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 501c8afe684SRob Clark seq_printf(m, " "); 502c8afe684SRob Clark msm_gem_describe(obj, m); 503c8afe684SRob Clark count++; 504c8afe684SRob Clark size += obj->size; 505c8afe684SRob Clark } 506c8afe684SRob Clark 507c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 508c8afe684SRob Clark } 509c8afe684SRob Clark #endif 510c8afe684SRob Clark 511c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 512c8afe684SRob Clark { 513c8afe684SRob Clark struct drm_device *dev = obj->dev; 514871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 515c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 516c8afe684SRob Clark int id; 517c8afe684SRob Clark 518c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 519c8afe684SRob Clark 5207198e6b0SRob Clark /* object should not be on active list: */ 5217198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 5227198e6b0SRob Clark 523c8afe684SRob Clark list_del(&msm_obj->mm_list); 524c8afe684SRob Clark 525c8afe684SRob Clark for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { 526871d812aSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 527871d812aSRob Clark if (mmu && msm_obj->domain[id].iova) { 528257d06f7SRob Clark uint32_t offset = msm_obj->domain[id].iova; 529871d812aSRob Clark mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); 530c8afe684SRob Clark } 531c8afe684SRob Clark } 532c8afe684SRob Clark 53305b84911SRob Clark if (obj->import_attach) { 53405b84911SRob Clark if (msm_obj->vaddr) 53505b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 53605b84911SRob Clark 53705b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 53805b84911SRob Clark * ours, just free the array we allocated: 53905b84911SRob Clark */ 54005b84911SRob Clark if (msm_obj->pages) 54105b84911SRob Clark drm_free_large(msm_obj->pages); 54205b84911SRob Clark 54305b84911SRob Clark } else { 544c8afe684SRob Clark vunmap(msm_obj->vaddr); 545c8afe684SRob Clark put_pages(obj); 54605b84911SRob Clark } 547c8afe684SRob Clark 5487198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 5497198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 5507198e6b0SRob Clark 551c8afe684SRob Clark drm_gem_object_release(obj); 552c8afe684SRob Clark 553c8afe684SRob Clark kfree(msm_obj); 554c8afe684SRob Clark } 555c8afe684SRob Clark 556c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 557c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 558c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 559c8afe684SRob Clark { 560c8afe684SRob Clark struct drm_gem_object *obj; 561c8afe684SRob Clark int ret; 562c8afe684SRob Clark 563c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 564c8afe684SRob Clark if (ret) 565c8afe684SRob Clark return ret; 566c8afe684SRob Clark 567c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 568c8afe684SRob Clark 569c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 570c8afe684SRob Clark 571c8afe684SRob Clark if (IS_ERR(obj)) 572c8afe684SRob Clark return PTR_ERR(obj); 573c8afe684SRob Clark 574c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 575c8afe684SRob Clark 576c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 577c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 578c8afe684SRob Clark 579c8afe684SRob Clark return ret; 580c8afe684SRob Clark } 581c8afe684SRob Clark 58205b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 58305b84911SRob Clark uint32_t size, uint32_t flags, 58405b84911SRob Clark struct drm_gem_object **obj) 585c8afe684SRob Clark { 586c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 587c8afe684SRob Clark struct msm_gem_object *msm_obj; 588871d812aSRob Clark unsigned sz; 589072f1f91SRob Clark bool use_vram = false; 590c8afe684SRob Clark 591c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 592c8afe684SRob Clark case MSM_BO_UNCACHED: 593c8afe684SRob Clark case MSM_BO_CACHED: 594c8afe684SRob Clark case MSM_BO_WC: 595c8afe684SRob Clark break; 596c8afe684SRob Clark default: 597c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 598c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 59905b84911SRob Clark return -EINVAL; 600c8afe684SRob Clark } 601c8afe684SRob Clark 602871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 603072f1f91SRob Clark use_vram = true; 604072f1f91SRob Clark else if ((flags & MSM_BO_STOLEN) && priv->vram.size) 605072f1f91SRob Clark use_vram = true; 606072f1f91SRob Clark 607072f1f91SRob Clark if (WARN_ON(use_vram && !priv->vram.size)) 608072f1f91SRob Clark return -EINVAL; 609072f1f91SRob Clark 610072f1f91SRob Clark sz = sizeof(*msm_obj); 611072f1f91SRob Clark if (use_vram) 612871d812aSRob Clark sz += sizeof(struct drm_mm_node); 613871d812aSRob Clark 614871d812aSRob Clark msm_obj = kzalloc(sz, GFP_KERNEL); 61505b84911SRob Clark if (!msm_obj) 61605b84911SRob Clark return -ENOMEM; 617c8afe684SRob Clark 618072f1f91SRob Clark if (use_vram) 619871d812aSRob Clark msm_obj->vram_node = (void *)&msm_obj[1]; 620871d812aSRob Clark 621c8afe684SRob Clark msm_obj->flags = flags; 622c8afe684SRob Clark 6237198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 6247198e6b0SRob Clark reservation_object_init(msm_obj->resv); 625c8afe684SRob Clark 6267198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 627c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 628c8afe684SRob Clark 62905b84911SRob Clark *obj = &msm_obj->base; 63005b84911SRob Clark 63105b84911SRob Clark return 0; 63205b84911SRob Clark } 63305b84911SRob Clark 63405b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 63505b84911SRob Clark uint32_t size, uint32_t flags) 63605b84911SRob Clark { 637871d812aSRob Clark struct drm_gem_object *obj = NULL; 63805b84911SRob Clark int ret; 63905b84911SRob Clark 64005b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 64105b84911SRob Clark 64205b84911SRob Clark size = PAGE_ALIGN(size); 64305b84911SRob Clark 64405b84911SRob Clark ret = msm_gem_new_impl(dev, size, flags, &obj); 64505b84911SRob Clark if (ret) 64605b84911SRob Clark goto fail; 64705b84911SRob Clark 648072f1f91SRob Clark if (use_pages(obj)) { 64905b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 65005b84911SRob Clark if (ret) 65105b84911SRob Clark goto fail; 652871d812aSRob Clark } else { 653871d812aSRob Clark drm_gem_private_object_init(dev, obj, size); 654871d812aSRob Clark } 65505b84911SRob Clark 65605b84911SRob Clark return obj; 65705b84911SRob Clark 65805b84911SRob Clark fail: 65905b84911SRob Clark if (obj) 6609999f105SRob Clark drm_gem_object_unreference(obj); 66105b84911SRob Clark 66205b84911SRob Clark return ERR_PTR(ret); 66305b84911SRob Clark } 66405b84911SRob Clark 66505b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 66605b84911SRob Clark uint32_t size, struct sg_table *sgt) 66705b84911SRob Clark { 66805b84911SRob Clark struct msm_gem_object *msm_obj; 66905b84911SRob Clark struct drm_gem_object *obj; 67005b84911SRob Clark int ret, npages; 67105b84911SRob Clark 672871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 673871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 674871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 675871d812aSRob Clark return ERR_PTR(-EINVAL); 676871d812aSRob Clark } 677871d812aSRob Clark 67805b84911SRob Clark size = PAGE_ALIGN(size); 67905b84911SRob Clark 68005b84911SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); 68105b84911SRob Clark if (ret) 68205b84911SRob Clark goto fail; 68305b84911SRob Clark 68405b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 68505b84911SRob Clark 68605b84911SRob Clark npages = size / PAGE_SIZE; 68705b84911SRob Clark 68805b84911SRob Clark msm_obj = to_msm_bo(obj); 68905b84911SRob Clark msm_obj->sgt = sgt; 69005b84911SRob Clark msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); 69105b84911SRob Clark if (!msm_obj->pages) { 69205b84911SRob Clark ret = -ENOMEM; 69305b84911SRob Clark goto fail; 69405b84911SRob Clark } 69505b84911SRob Clark 69605b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 69705b84911SRob Clark if (ret) 69805b84911SRob Clark goto fail; 69905b84911SRob Clark 700c8afe684SRob Clark return obj; 701c8afe684SRob Clark 702c8afe684SRob Clark fail: 703c8afe684SRob Clark if (obj) 704c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 705c8afe684SRob Clark 706c8afe684SRob Clark return ERR_PTR(ret); 707c8afe684SRob Clark } 708