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; 199c8afe684SRob Clark struct page **pages; 200c8afe684SRob Clark unsigned long pfn; 201c8afe684SRob Clark pgoff_t pgoff; 202c8afe684SRob Clark int ret; 203c8afe684SRob Clark 204c8afe684SRob Clark /* Make sure we don't parallel update on a fault, nor move or remove 205c8afe684SRob Clark * something from beneath our feet 206c8afe684SRob Clark */ 207c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 208c8afe684SRob Clark if (ret) 209c8afe684SRob Clark goto out; 210c8afe684SRob Clark 211c8afe684SRob Clark /* make sure we have pages attached now */ 212c8afe684SRob Clark pages = get_pages(obj); 213c8afe684SRob Clark if (IS_ERR(pages)) { 214c8afe684SRob Clark ret = PTR_ERR(pages); 215c8afe684SRob Clark goto out_unlock; 216c8afe684SRob Clark } 217c8afe684SRob Clark 218c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 219c8afe684SRob Clark pgoff = ((unsigned long)vmf->virtual_address - 220c8afe684SRob Clark vma->vm_start) >> PAGE_SHIFT; 221c8afe684SRob Clark 222871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 223c8afe684SRob Clark 224c8afe684SRob Clark VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, 225c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 226c8afe684SRob Clark 22701c8f1c4SDan Williams ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, 22801c8f1c4SDan Williams __pfn_to_pfn_t(pfn, PFN_DEV)); 229c8afe684SRob Clark 230c8afe684SRob Clark out_unlock: 231c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 232c8afe684SRob Clark out: 233c8afe684SRob Clark switch (ret) { 234c8afe684SRob Clark case -EAGAIN: 235c8afe684SRob Clark case 0: 236c8afe684SRob Clark case -ERESTARTSYS: 237c8afe684SRob Clark case -EINTR: 238505886d5SRob Clark case -EBUSY: 239505886d5SRob Clark /* 240505886d5SRob Clark * EBUSY is ok: this just means that another thread 241505886d5SRob Clark * already did the job. 242505886d5SRob Clark */ 243c8afe684SRob Clark return VM_FAULT_NOPAGE; 244c8afe684SRob Clark case -ENOMEM: 245c8afe684SRob Clark return VM_FAULT_OOM; 246c8afe684SRob Clark default: 247c8afe684SRob Clark return VM_FAULT_SIGBUS; 248c8afe684SRob Clark } 249c8afe684SRob Clark } 250c8afe684SRob Clark 251c8afe684SRob Clark /** get mmap offset */ 252c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 253c8afe684SRob Clark { 254c8afe684SRob Clark struct drm_device *dev = obj->dev; 255c8afe684SRob Clark int ret; 256c8afe684SRob Clark 257c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 258c8afe684SRob Clark 259c8afe684SRob Clark /* Make it mmapable */ 260c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 261c8afe684SRob Clark 262c8afe684SRob Clark if (ret) { 263c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 264c8afe684SRob Clark return 0; 265c8afe684SRob Clark } 266c8afe684SRob Clark 267c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 268c8afe684SRob Clark } 269c8afe684SRob Clark 270c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 271c8afe684SRob Clark { 272c8afe684SRob Clark uint64_t offset; 273c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 274c8afe684SRob Clark offset = mmap_offset(obj); 275c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 276c8afe684SRob Clark return offset; 277c8afe684SRob Clark } 278c8afe684SRob Clark 279c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 280c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 281c8afe684SRob Clark * iova ref if you know one is already held. 282c8afe684SRob Clark * 283c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 284c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 285c8afe684SRob Clark */ 286c8afe684SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, 287c8afe684SRob Clark uint32_t *iova) 288c8afe684SRob Clark { 289c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 290c8afe684SRob Clark int ret = 0; 291c8afe684SRob Clark 292c8afe684SRob Clark if (!msm_obj->domain[id].iova) { 293c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 294871d812aSRob Clark struct page **pages = get_pages(obj); 295871d812aSRob Clark 296c8afe684SRob Clark if (IS_ERR(pages)) 297c8afe684SRob Clark return PTR_ERR(pages); 298871d812aSRob Clark 299871d812aSRob Clark if (iommu_present(&platform_bus_type)) { 3001c4997feSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 3011c4997feSRob Clark uint32_t offset; 3021c4997feSRob Clark 3031c4997feSRob Clark if (WARN_ON(!mmu)) 3041c4997feSRob Clark return -EINVAL; 3051c4997feSRob Clark 3061c4997feSRob Clark offset = (uint32_t)mmap_offset(obj); 307871d812aSRob Clark ret = mmu->funcs->map(mmu, offset, msm_obj->sgt, 308c8afe684SRob Clark obj->size, IOMMU_READ | IOMMU_WRITE); 309c8afe684SRob Clark msm_obj->domain[id].iova = offset; 310871d812aSRob Clark } else { 311871d812aSRob Clark msm_obj->domain[id].iova = physaddr(obj); 312871d812aSRob Clark } 313c8afe684SRob Clark } 314c8afe684SRob Clark 315c8afe684SRob Clark if (!ret) 316c8afe684SRob Clark *iova = msm_obj->domain[id].iova; 317c8afe684SRob Clark 318c8afe684SRob Clark return ret; 319c8afe684SRob Clark } 320c8afe684SRob Clark 3212638d90aSRob Clark /* get iova, taking a reference. Should have a matching put */ 322c8afe684SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) 323c8afe684SRob Clark { 324edd4fc63SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 325c8afe684SRob Clark int ret; 326edd4fc63SRob Clark 327edd4fc63SRob Clark /* this is safe right now because we don't unmap until the 328edd4fc63SRob Clark * bo is deleted: 329edd4fc63SRob Clark */ 330edd4fc63SRob Clark if (msm_obj->domain[id].iova) { 331edd4fc63SRob Clark *iova = msm_obj->domain[id].iova; 332edd4fc63SRob Clark return 0; 333edd4fc63SRob Clark } 334edd4fc63SRob Clark 335c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 336c8afe684SRob Clark ret = msm_gem_get_iova_locked(obj, id, iova); 337c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 338c8afe684SRob Clark return ret; 339c8afe684SRob Clark } 340c8afe684SRob Clark 3412638d90aSRob Clark /* get iova without taking a reference, used in places where you have 3422638d90aSRob Clark * already done a 'msm_gem_get_iova()'. 3432638d90aSRob Clark */ 3442638d90aSRob Clark uint32_t msm_gem_iova(struct drm_gem_object *obj, int id) 3452638d90aSRob Clark { 3462638d90aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3472638d90aSRob Clark WARN_ON(!msm_obj->domain[id].iova); 3482638d90aSRob Clark return msm_obj->domain[id].iova; 3492638d90aSRob Clark } 3502638d90aSRob Clark 351c8afe684SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, int id) 352c8afe684SRob Clark { 353c8afe684SRob Clark // XXX TODO .. 354c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 355c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 356c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 357c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 358c8afe684SRob Clark // things that are no longer needed.. 359c8afe684SRob Clark } 360c8afe684SRob Clark 361c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 362c8afe684SRob Clark struct drm_mode_create_dumb *args) 363c8afe684SRob Clark { 364c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 365c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 366c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 367c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 368c8afe684SRob Clark } 369c8afe684SRob Clark 370c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 371c8afe684SRob Clark uint32_t handle, uint64_t *offset) 372c8afe684SRob Clark { 373c8afe684SRob Clark struct drm_gem_object *obj; 374c8afe684SRob Clark int ret = 0; 375c8afe684SRob Clark 376c8afe684SRob Clark /* GEM does all our handle to object mapping */ 377a8ad0bd8SChris Wilson obj = drm_gem_object_lookup(file, handle); 378c8afe684SRob Clark if (obj == NULL) { 379c8afe684SRob Clark ret = -ENOENT; 380c8afe684SRob Clark goto fail; 381c8afe684SRob Clark } 382c8afe684SRob Clark 383c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 384c8afe684SRob Clark 385c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 386c8afe684SRob Clark 387c8afe684SRob Clark fail: 388c8afe684SRob Clark return ret; 389c8afe684SRob Clark } 390c8afe684SRob Clark 391c8afe684SRob Clark void *msm_gem_vaddr_locked(struct drm_gem_object *obj) 392c8afe684SRob Clark { 393c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 394c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 395c8afe684SRob Clark if (!msm_obj->vaddr) { 396c8afe684SRob Clark struct page **pages = get_pages(obj); 397c8afe684SRob Clark if (IS_ERR(pages)) 398c8afe684SRob Clark return ERR_CAST(pages); 399c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 400c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 40169a834c2SRob Clark if (msm_obj->vaddr == NULL) 40269a834c2SRob Clark return ERR_PTR(-ENOMEM); 403c8afe684SRob Clark } 404c8afe684SRob Clark return msm_obj->vaddr; 405c8afe684SRob Clark } 406c8afe684SRob Clark 407c8afe684SRob Clark void *msm_gem_vaddr(struct drm_gem_object *obj) 408c8afe684SRob Clark { 409c8afe684SRob Clark void *ret; 410c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 411c8afe684SRob Clark ret = msm_gem_vaddr_locked(obj); 412c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 413c8afe684SRob Clark return ret; 414c8afe684SRob Clark } 415c8afe684SRob Clark 416b6295f9aSRob Clark /* must be called before _move_to_active().. */ 417b6295f9aSRob Clark int msm_gem_sync_object(struct drm_gem_object *obj, 418b6295f9aSRob Clark struct msm_fence_context *fctx, bool exclusive) 419b6295f9aSRob Clark { 420b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 421b6295f9aSRob Clark struct reservation_object_list *fobj; 422b6295f9aSRob Clark struct fence *fence; 423b6295f9aSRob Clark int i, ret; 424b6295f9aSRob Clark 425b6295f9aSRob Clark if (!exclusive) { 426b6295f9aSRob Clark /* NOTE: _reserve_shared() must happen before _add_shared_fence(), 427b6295f9aSRob Clark * which makes this a slightly strange place to call it. OTOH this 428b6295f9aSRob Clark * is a convenient can-fail point to hook it in. (And similar to 429b6295f9aSRob Clark * how etnaviv and nouveau handle this.) 430b6295f9aSRob Clark */ 431b6295f9aSRob Clark ret = reservation_object_reserve_shared(msm_obj->resv); 432b6295f9aSRob Clark if (ret) 433b6295f9aSRob Clark return ret; 434b6295f9aSRob Clark } 435b6295f9aSRob Clark 436b6295f9aSRob Clark fobj = reservation_object_get_list(msm_obj->resv); 437b6295f9aSRob Clark if (!fobj || (fobj->shared_count == 0)) { 438b6295f9aSRob Clark fence = reservation_object_get_excl(msm_obj->resv); 439b6295f9aSRob Clark /* don't need to wait on our own fences, since ring is fifo */ 440b6295f9aSRob Clark if (fence && (fence->context != fctx->context)) { 441b6295f9aSRob Clark ret = fence_wait(fence, true); 442b6295f9aSRob Clark if (ret) 443b6295f9aSRob Clark return ret; 444b6295f9aSRob Clark } 445b6295f9aSRob Clark } 446b6295f9aSRob Clark 447b6295f9aSRob Clark if (!exclusive || !fobj) 448b6295f9aSRob Clark return 0; 449b6295f9aSRob Clark 450b6295f9aSRob Clark for (i = 0; i < fobj->shared_count; i++) { 451b6295f9aSRob Clark fence = rcu_dereference_protected(fobj->shared[i], 452b6295f9aSRob Clark reservation_object_held(msm_obj->resv)); 453b6295f9aSRob Clark if (fence->context != fctx->context) { 454b6295f9aSRob Clark ret = fence_wait(fence, true); 455b6295f9aSRob Clark if (ret) 456b6295f9aSRob Clark return ret; 457b6295f9aSRob Clark } 458b6295f9aSRob Clark } 459b6295f9aSRob Clark 460b6295f9aSRob Clark return 0; 461b6295f9aSRob Clark } 462b6295f9aSRob Clark 4637198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 464b6295f9aSRob Clark struct msm_gpu *gpu, bool exclusive, struct fence *fence) 4657198e6b0SRob Clark { 4667198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4677198e6b0SRob Clark msm_obj->gpu = gpu; 468b6295f9aSRob Clark if (exclusive) 469b6295f9aSRob Clark reservation_object_add_excl_fence(msm_obj->resv, fence); 470bf6811f3SRob Clark else 471b6295f9aSRob Clark reservation_object_add_shared_fence(msm_obj->resv, fence); 4727198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4737198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 4747198e6b0SRob Clark } 4757198e6b0SRob Clark 4767198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 4777198e6b0SRob Clark { 4787198e6b0SRob Clark struct drm_device *dev = obj->dev; 4797198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 4807198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4817198e6b0SRob Clark 4827198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 4837198e6b0SRob Clark 4847198e6b0SRob Clark msm_obj->gpu = NULL; 4857198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4867198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 4877198e6b0SRob Clark } 4887198e6b0SRob Clark 489ba00c3f2SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 490ba00c3f2SRob Clark { 491b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 492b6295f9aSRob Clark bool write = !!(op & MSM_PREP_WRITE); 493b6295f9aSRob Clark 494b6295f9aSRob Clark if (op & MSM_PREP_NOSYNC) { 495b6295f9aSRob Clark if (!reservation_object_test_signaled_rcu(msm_obj->resv, write)) 496b6295f9aSRob Clark return -EBUSY; 497b6295f9aSRob Clark } else { 498b6295f9aSRob Clark int ret; 499b6295f9aSRob Clark 500b6295f9aSRob Clark ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, 501b6295f9aSRob Clark true, timeout_to_jiffies(timeout)); 502b6295f9aSRob Clark if (ret <= 0) 503b6295f9aSRob Clark return ret == 0 ? -ETIMEDOUT : ret; 504b6295f9aSRob Clark } 505ba00c3f2SRob Clark 5067198e6b0SRob Clark /* TODO cache maintenance */ 5077198e6b0SRob Clark 508b6295f9aSRob Clark return 0; 5097198e6b0SRob Clark } 5107198e6b0SRob Clark 5117198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 5127198e6b0SRob Clark { 5137198e6b0SRob Clark /* TODO cache maintenance */ 514c8afe684SRob Clark return 0; 515c8afe684SRob Clark } 516c8afe684SRob Clark 517c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 518b6295f9aSRob Clark static void describe_fence(struct fence *fence, const char *type, 519b6295f9aSRob Clark struct seq_file *m) 520b6295f9aSRob Clark { 521b6295f9aSRob Clark if (!fence_is_signaled(fence)) 522b6295f9aSRob Clark seq_printf(m, "\t%9s: %s %s seq %u\n", type, 523b6295f9aSRob Clark fence->ops->get_driver_name(fence), 524b6295f9aSRob Clark fence->ops->get_timeline_name(fence), 525b6295f9aSRob Clark fence->seqno); 526b6295f9aSRob Clark } 527b6295f9aSRob Clark 528c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 529c8afe684SRob Clark { 530c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 531b6295f9aSRob Clark struct reservation_object *robj = msm_obj->resv; 532b6295f9aSRob Clark struct reservation_object_list *fobj; 533b6295f9aSRob Clark struct fence *fence; 534c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 535c8afe684SRob Clark 536b6295f9aSRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 537b6295f9aSRob Clark 538b6295f9aSRob Clark seq_printf(m, "%08x: %c %2d (%2d) %08llx %p %zu\n", 5397198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 540bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 541c8afe684SRob Clark off, msm_obj->vaddr, obj->size); 542b6295f9aSRob Clark 543b6295f9aSRob Clark rcu_read_lock(); 544b6295f9aSRob Clark fobj = rcu_dereference(robj->fence); 545b6295f9aSRob Clark if (fobj) { 546b6295f9aSRob Clark unsigned int i, shared_count = fobj->shared_count; 547b6295f9aSRob Clark 548b6295f9aSRob Clark for (i = 0; i < shared_count; i++) { 549b6295f9aSRob Clark fence = rcu_dereference(fobj->shared[i]); 550b6295f9aSRob Clark describe_fence(fence, "Shared", m); 551b6295f9aSRob Clark } 552b6295f9aSRob Clark } 553b6295f9aSRob Clark 554b6295f9aSRob Clark fence = rcu_dereference(robj->fence_excl); 555b6295f9aSRob Clark if (fence) 556b6295f9aSRob Clark describe_fence(fence, "Exclusive", m); 557b6295f9aSRob Clark rcu_read_unlock(); 558c8afe684SRob Clark } 559c8afe684SRob Clark 560c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 561c8afe684SRob Clark { 562c8afe684SRob Clark struct msm_gem_object *msm_obj; 563c8afe684SRob Clark int count = 0; 564c8afe684SRob Clark size_t size = 0; 565c8afe684SRob Clark 566c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 567c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 568c8afe684SRob Clark seq_printf(m, " "); 569c8afe684SRob Clark msm_gem_describe(obj, m); 570c8afe684SRob Clark count++; 571c8afe684SRob Clark size += obj->size; 572c8afe684SRob Clark } 573c8afe684SRob Clark 574c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 575c8afe684SRob Clark } 576c8afe684SRob Clark #endif 577c8afe684SRob Clark 578c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 579c8afe684SRob Clark { 580c8afe684SRob Clark struct drm_device *dev = obj->dev; 581871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 582c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 583c8afe684SRob Clark int id; 584c8afe684SRob Clark 585c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 586c8afe684SRob Clark 5877198e6b0SRob Clark /* object should not be on active list: */ 5887198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 5897198e6b0SRob Clark 590c8afe684SRob Clark list_del(&msm_obj->mm_list); 591c8afe684SRob Clark 592c8afe684SRob Clark for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { 593871d812aSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 594871d812aSRob Clark if (mmu && msm_obj->domain[id].iova) { 595257d06f7SRob Clark uint32_t offset = msm_obj->domain[id].iova; 596871d812aSRob Clark mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); 597c8afe684SRob Clark } 598c8afe684SRob Clark } 599c8afe684SRob Clark 60005b84911SRob Clark if (obj->import_attach) { 60105b84911SRob Clark if (msm_obj->vaddr) 60205b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 60305b84911SRob Clark 60405b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 60505b84911SRob Clark * ours, just free the array we allocated: 60605b84911SRob Clark */ 60705b84911SRob Clark if (msm_obj->pages) 60805b84911SRob Clark drm_free_large(msm_obj->pages); 60905b84911SRob Clark 610f28730c8Sjilai wang drm_prime_gem_destroy(obj, msm_obj->sgt); 61105b84911SRob Clark } else { 612c8afe684SRob Clark vunmap(msm_obj->vaddr); 613c8afe684SRob Clark put_pages(obj); 61405b84911SRob Clark } 615c8afe684SRob Clark 6167198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 6177198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 6187198e6b0SRob Clark 619c8afe684SRob Clark drm_gem_object_release(obj); 620c8afe684SRob Clark 621c8afe684SRob Clark kfree(msm_obj); 622c8afe684SRob Clark } 623c8afe684SRob Clark 624c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 625c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 626c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 627c8afe684SRob Clark { 628c8afe684SRob Clark struct drm_gem_object *obj; 629c8afe684SRob Clark int ret; 630c8afe684SRob Clark 631c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 632c8afe684SRob Clark if (ret) 633c8afe684SRob Clark return ret; 634c8afe684SRob Clark 635c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 636c8afe684SRob Clark 637c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 638c8afe684SRob Clark 639c8afe684SRob Clark if (IS_ERR(obj)) 640c8afe684SRob Clark return PTR_ERR(obj); 641c8afe684SRob Clark 642c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 643c8afe684SRob Clark 644c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 645c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 646c8afe684SRob Clark 647c8afe684SRob Clark return ret; 648c8afe684SRob Clark } 649c8afe684SRob Clark 65005b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 65105b84911SRob Clark uint32_t size, uint32_t flags, 65279f0e202SRob Clark struct reservation_object *resv, 65305b84911SRob Clark struct drm_gem_object **obj) 654c8afe684SRob Clark { 655c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 656c8afe684SRob Clark struct msm_gem_object *msm_obj; 657871d812aSRob Clark unsigned sz; 658072f1f91SRob Clark bool use_vram = false; 659c8afe684SRob Clark 660c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 661c8afe684SRob Clark case MSM_BO_UNCACHED: 662c8afe684SRob Clark case MSM_BO_CACHED: 663c8afe684SRob Clark case MSM_BO_WC: 664c8afe684SRob Clark break; 665c8afe684SRob Clark default: 666c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 667c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 66805b84911SRob Clark return -EINVAL; 669c8afe684SRob Clark } 670c8afe684SRob Clark 671871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 672072f1f91SRob Clark use_vram = true; 673072f1f91SRob Clark else if ((flags & MSM_BO_STOLEN) && priv->vram.size) 674072f1f91SRob Clark use_vram = true; 675072f1f91SRob Clark 676072f1f91SRob Clark if (WARN_ON(use_vram && !priv->vram.size)) 677072f1f91SRob Clark return -EINVAL; 678072f1f91SRob Clark 679072f1f91SRob Clark sz = sizeof(*msm_obj); 680072f1f91SRob Clark if (use_vram) 681871d812aSRob Clark sz += sizeof(struct drm_mm_node); 682871d812aSRob Clark 683871d812aSRob Clark msm_obj = kzalloc(sz, GFP_KERNEL); 68405b84911SRob Clark if (!msm_obj) 68505b84911SRob Clark return -ENOMEM; 686c8afe684SRob Clark 687072f1f91SRob Clark if (use_vram) 688871d812aSRob Clark msm_obj->vram_node = (void *)&msm_obj[1]; 689871d812aSRob Clark 690c8afe684SRob Clark msm_obj->flags = flags; 691c8afe684SRob Clark 69279f0e202SRob Clark if (resv) { 69379f0e202SRob Clark msm_obj->resv = resv; 69479f0e202SRob Clark } else { 6957198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 6967198e6b0SRob Clark reservation_object_init(msm_obj->resv); 69779f0e202SRob Clark } 698c8afe684SRob Clark 6997198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 700c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 701c8afe684SRob Clark 70205b84911SRob Clark *obj = &msm_obj->base; 70305b84911SRob Clark 70405b84911SRob Clark return 0; 70505b84911SRob Clark } 70605b84911SRob Clark 70705b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 70805b84911SRob Clark uint32_t size, uint32_t flags) 70905b84911SRob Clark { 710871d812aSRob Clark struct drm_gem_object *obj = NULL; 71105b84911SRob Clark int ret; 71205b84911SRob Clark 71305b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 71405b84911SRob Clark 71505b84911SRob Clark size = PAGE_ALIGN(size); 71605b84911SRob Clark 71779f0e202SRob Clark ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); 71805b84911SRob Clark if (ret) 71905b84911SRob Clark goto fail; 72005b84911SRob Clark 721072f1f91SRob Clark if (use_pages(obj)) { 72205b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 72305b84911SRob Clark if (ret) 72405b84911SRob Clark goto fail; 725871d812aSRob Clark } else { 726871d812aSRob Clark drm_gem_private_object_init(dev, obj, size); 727871d812aSRob Clark } 72805b84911SRob Clark 72905b84911SRob Clark return obj; 73005b84911SRob Clark 73105b84911SRob Clark fail: 73205b84911SRob Clark if (obj) 7339999f105SRob Clark drm_gem_object_unreference(obj); 73405b84911SRob Clark 73505b84911SRob Clark return ERR_PTR(ret); 73605b84911SRob Clark } 73705b84911SRob Clark 73805b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 73979f0e202SRob Clark struct dma_buf *dmabuf, struct sg_table *sgt) 74005b84911SRob Clark { 74105b84911SRob Clark struct msm_gem_object *msm_obj; 74205b84911SRob Clark struct drm_gem_object *obj; 74379f0e202SRob Clark uint32_t size; 74405b84911SRob Clark int ret, npages; 74505b84911SRob Clark 746871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 747871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 748871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 749871d812aSRob Clark return ERR_PTR(-EINVAL); 750871d812aSRob Clark } 751871d812aSRob Clark 75279f0e202SRob Clark size = PAGE_ALIGN(dmabuf->size); 75305b84911SRob Clark 75479f0e202SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj); 75505b84911SRob Clark if (ret) 75605b84911SRob Clark goto fail; 75705b84911SRob Clark 75805b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 75905b84911SRob Clark 76005b84911SRob Clark npages = size / PAGE_SIZE; 76105b84911SRob Clark 76205b84911SRob Clark msm_obj = to_msm_bo(obj); 76305b84911SRob Clark msm_obj->sgt = sgt; 76405b84911SRob Clark msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); 76505b84911SRob Clark if (!msm_obj->pages) { 76605b84911SRob Clark ret = -ENOMEM; 76705b84911SRob Clark goto fail; 76805b84911SRob Clark } 76905b84911SRob Clark 77005b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 77105b84911SRob Clark if (ret) 77205b84911SRob Clark goto fail; 77305b84911SRob Clark 774c8afe684SRob Clark return obj; 775c8afe684SRob Clark 776c8afe684SRob Clark fail: 777c8afe684SRob Clark if (obj) 778c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 779c8afe684SRob Clark 780c8afe684SRob Clark return ERR_PTR(ret); 781c8afe684SRob Clark } 782