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" 24c8afe684SRob Clark #include "msm_gem.h" 257198e6b0SRob Clark #include "msm_gpu.h" 26871d812aSRob Clark #include "msm_mmu.h" 27c8afe684SRob Clark 28871d812aSRob Clark static dma_addr_t physaddr(struct drm_gem_object *obj) 29871d812aSRob Clark { 30871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 31871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 32871d812aSRob Clark return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + 33871d812aSRob Clark priv->vram.paddr; 34871d812aSRob Clark } 35871d812aSRob Clark 36072f1f91SRob Clark static bool use_pages(struct drm_gem_object *obj) 37072f1f91SRob Clark { 38072f1f91SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 39072f1f91SRob Clark return !msm_obj->vram_node; 40072f1f91SRob Clark } 41072f1f91SRob Clark 42871d812aSRob Clark /* allocate pages from VRAM carveout, used when no IOMMU: */ 43871d812aSRob Clark static struct page **get_pages_vram(struct drm_gem_object *obj, 44871d812aSRob Clark int npages) 45871d812aSRob Clark { 46871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 47871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 48871d812aSRob Clark dma_addr_t paddr; 49871d812aSRob Clark struct page **p; 50871d812aSRob Clark int ret, i; 51871d812aSRob Clark 52871d812aSRob Clark p = drm_malloc_ab(npages, sizeof(struct page *)); 53871d812aSRob Clark if (!p) 54871d812aSRob Clark return ERR_PTR(-ENOMEM); 55871d812aSRob Clark 56871d812aSRob Clark ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, 57871d812aSRob Clark npages, 0, DRM_MM_SEARCH_DEFAULT); 58871d812aSRob Clark if (ret) { 59871d812aSRob Clark drm_free_large(p); 60871d812aSRob Clark return ERR_PTR(ret); 61871d812aSRob Clark } 62871d812aSRob Clark 63871d812aSRob Clark paddr = physaddr(obj); 64871d812aSRob Clark for (i = 0; i < npages; i++) { 65871d812aSRob Clark p[i] = phys_to_page(paddr); 66871d812aSRob Clark paddr += PAGE_SIZE; 67871d812aSRob Clark } 68871d812aSRob Clark 69871d812aSRob Clark return p; 70871d812aSRob Clark } 71c8afe684SRob Clark 72c8afe684SRob Clark /* called with dev->struct_mutex held */ 73c8afe684SRob Clark static struct page **get_pages(struct drm_gem_object *obj) 74c8afe684SRob Clark { 75c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 76c8afe684SRob Clark 77c8afe684SRob Clark if (!msm_obj->pages) { 78c8afe684SRob Clark struct drm_device *dev = obj->dev; 79871d812aSRob Clark struct page **p; 80c8afe684SRob Clark int npages = obj->size >> PAGE_SHIFT; 81c8afe684SRob Clark 82072f1f91SRob Clark if (use_pages(obj)) 830cdbe8acSDavid Herrmann p = drm_gem_get_pages(obj); 84871d812aSRob Clark else 85871d812aSRob Clark p = get_pages_vram(obj, npages); 86871d812aSRob Clark 87c8afe684SRob Clark if (IS_ERR(p)) { 88c8afe684SRob Clark dev_err(dev->dev, "could not get pages: %ld\n", 89c8afe684SRob Clark PTR_ERR(p)); 90c8afe684SRob Clark return p; 91c8afe684SRob Clark } 92c8afe684SRob Clark 93c8afe684SRob Clark msm_obj->sgt = drm_prime_pages_to_sg(p, npages); 941f70e079SWei Yongjun if (IS_ERR(msm_obj->sgt)) { 95c8afe684SRob Clark dev_err(dev->dev, "failed to allocate sgt\n"); 961f70e079SWei Yongjun return ERR_CAST(msm_obj->sgt); 97c8afe684SRob Clark } 98c8afe684SRob Clark 99c8afe684SRob Clark msm_obj->pages = p; 100c8afe684SRob Clark 101c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 102c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 103c8afe684SRob Clark */ 104c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 105c8afe684SRob Clark dma_map_sg(dev->dev, msm_obj->sgt->sgl, 106c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 107c8afe684SRob Clark } 108c8afe684SRob Clark 109c8afe684SRob Clark return msm_obj->pages; 110c8afe684SRob Clark } 111c8afe684SRob Clark 112c8afe684SRob Clark static void put_pages(struct drm_gem_object *obj) 113c8afe684SRob Clark { 114c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 115c8afe684SRob Clark 116c8afe684SRob Clark if (msm_obj->pages) { 117c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 118c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 119c8afe684SRob Clark */ 120c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 121c8afe684SRob Clark dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, 122c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 123c8afe684SRob Clark sg_free_table(msm_obj->sgt); 124c8afe684SRob Clark kfree(msm_obj->sgt); 125c8afe684SRob Clark 126072f1f91SRob Clark if (use_pages(obj)) 127c8afe684SRob Clark drm_gem_put_pages(obj, msm_obj->pages, true, false); 1281ffa2425SMicah Richert else { 129871d812aSRob Clark drm_mm_remove_node(msm_obj->vram_node); 1301ffa2425SMicah Richert drm_free_large(msm_obj->pages); 1311ffa2425SMicah Richert } 132871d812aSRob Clark 133c8afe684SRob Clark msm_obj->pages = NULL; 134c8afe684SRob Clark } 135c8afe684SRob Clark } 136c8afe684SRob Clark 13705b84911SRob Clark struct page **msm_gem_get_pages(struct drm_gem_object *obj) 13805b84911SRob Clark { 13905b84911SRob Clark struct drm_device *dev = obj->dev; 14005b84911SRob Clark struct page **p; 14105b84911SRob Clark mutex_lock(&dev->struct_mutex); 14205b84911SRob Clark p = get_pages(obj); 14305b84911SRob Clark mutex_unlock(&dev->struct_mutex); 14405b84911SRob Clark return p; 14505b84911SRob Clark } 14605b84911SRob Clark 14705b84911SRob Clark void msm_gem_put_pages(struct drm_gem_object *obj) 14805b84911SRob Clark { 14905b84911SRob Clark /* when we start tracking the pin count, then do something here */ 15005b84911SRob Clark } 15105b84911SRob Clark 152c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 153c8afe684SRob Clark struct vm_area_struct *vma) 154c8afe684SRob Clark { 155c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 156c8afe684SRob Clark 157c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 158c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 159c8afe684SRob Clark 160c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 161c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 162c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 163c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 164c8afe684SRob Clark } else { 165c8afe684SRob Clark /* 166c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 167c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 168c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 169c8afe684SRob Clark */ 170c8afe684SRob Clark fput(vma->vm_file); 171c8afe684SRob Clark get_file(obj->filp); 172c8afe684SRob Clark vma->vm_pgoff = 0; 173c8afe684SRob Clark vma->vm_file = obj->filp; 174c8afe684SRob Clark 175c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 176c8afe684SRob Clark } 177c8afe684SRob Clark 178c8afe684SRob Clark return 0; 179c8afe684SRob Clark } 180c8afe684SRob Clark 181c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 182c8afe684SRob Clark { 183c8afe684SRob Clark int ret; 184c8afe684SRob Clark 185c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 186c8afe684SRob Clark if (ret) { 187c8afe684SRob Clark DBG("mmap failed: %d", ret); 188c8afe684SRob Clark return ret; 189c8afe684SRob Clark } 190c8afe684SRob Clark 191c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 192c8afe684SRob Clark } 193c8afe684SRob Clark 194c8afe684SRob Clark int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 195c8afe684SRob Clark { 196c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 197c8afe684SRob Clark struct drm_device *dev = obj->dev; 198c8afe684SRob Clark struct page **pages; 199c8afe684SRob Clark unsigned long pfn; 200c8afe684SRob Clark pgoff_t pgoff; 201c8afe684SRob Clark int ret; 202c8afe684SRob Clark 203c8afe684SRob Clark /* Make sure we don't parallel update on a fault, nor move or remove 204c8afe684SRob Clark * something from beneath our feet 205c8afe684SRob Clark */ 206c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 207c8afe684SRob Clark if (ret) 208c8afe684SRob Clark goto out; 209c8afe684SRob Clark 210c8afe684SRob Clark /* make sure we have pages attached now */ 211c8afe684SRob Clark pages = get_pages(obj); 212c8afe684SRob Clark if (IS_ERR(pages)) { 213c8afe684SRob Clark ret = PTR_ERR(pages); 214c8afe684SRob Clark goto out_unlock; 215c8afe684SRob Clark } 216c8afe684SRob Clark 217c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 218c8afe684SRob Clark pgoff = ((unsigned long)vmf->virtual_address - 219c8afe684SRob Clark vma->vm_start) >> PAGE_SHIFT; 220c8afe684SRob Clark 221871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 222c8afe684SRob Clark 223c8afe684SRob Clark VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, 224c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 225c8afe684SRob Clark 22601c8f1c4SDan Williams ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, 22701c8f1c4SDan Williams __pfn_to_pfn_t(pfn, PFN_DEV)); 228c8afe684SRob Clark 229c8afe684SRob Clark out_unlock: 230c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 231c8afe684SRob Clark out: 232c8afe684SRob Clark switch (ret) { 233c8afe684SRob Clark case -EAGAIN: 234c8afe684SRob Clark case 0: 235c8afe684SRob Clark case -ERESTARTSYS: 236c8afe684SRob Clark case -EINTR: 237505886d5SRob Clark case -EBUSY: 238505886d5SRob Clark /* 239505886d5SRob Clark * EBUSY is ok: this just means that another thread 240505886d5SRob Clark * already did the job. 241505886d5SRob Clark */ 242c8afe684SRob Clark return VM_FAULT_NOPAGE; 243c8afe684SRob Clark case -ENOMEM: 244c8afe684SRob Clark return VM_FAULT_OOM; 245c8afe684SRob Clark default: 246c8afe684SRob Clark return VM_FAULT_SIGBUS; 247c8afe684SRob Clark } 248c8afe684SRob Clark } 249c8afe684SRob Clark 250c8afe684SRob Clark /** get mmap offset */ 251c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 252c8afe684SRob Clark { 253c8afe684SRob Clark struct drm_device *dev = obj->dev; 254c8afe684SRob Clark int ret; 255c8afe684SRob Clark 256c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 257c8afe684SRob Clark 258c8afe684SRob Clark /* Make it mmapable */ 259c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 260c8afe684SRob Clark 261c8afe684SRob Clark if (ret) { 262c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 263c8afe684SRob Clark return 0; 264c8afe684SRob Clark } 265c8afe684SRob Clark 266c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 267c8afe684SRob Clark } 268c8afe684SRob Clark 269c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 270c8afe684SRob Clark { 271c8afe684SRob Clark uint64_t offset; 272c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 273c8afe684SRob Clark offset = mmap_offset(obj); 274c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 275c8afe684SRob Clark return offset; 276c8afe684SRob Clark } 277c8afe684SRob Clark 278c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 279c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 280c8afe684SRob Clark * iova ref if you know one is already held. 281c8afe684SRob Clark * 282c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 283c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 284c8afe684SRob Clark */ 285c8afe684SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, 286c8afe684SRob Clark uint32_t *iova) 287c8afe684SRob Clark { 288c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 289c8afe684SRob Clark int ret = 0; 290c8afe684SRob Clark 291c8afe684SRob Clark if (!msm_obj->domain[id].iova) { 292c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 293871d812aSRob Clark struct page **pages = get_pages(obj); 294871d812aSRob Clark 295c8afe684SRob Clark if (IS_ERR(pages)) 296c8afe684SRob Clark return PTR_ERR(pages); 297871d812aSRob Clark 298871d812aSRob Clark if (iommu_present(&platform_bus_type)) { 2991c4997feSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 3001c4997feSRob Clark uint32_t offset; 3011c4997feSRob Clark 3021c4997feSRob Clark if (WARN_ON(!mmu)) 3031c4997feSRob Clark return -EINVAL; 3041c4997feSRob Clark 3051c4997feSRob Clark offset = (uint32_t)mmap_offset(obj); 306871d812aSRob Clark ret = mmu->funcs->map(mmu, offset, msm_obj->sgt, 307c8afe684SRob Clark obj->size, IOMMU_READ | IOMMU_WRITE); 308c8afe684SRob Clark msm_obj->domain[id].iova = offset; 309871d812aSRob Clark } else { 310871d812aSRob Clark msm_obj->domain[id].iova = physaddr(obj); 311871d812aSRob Clark } 312c8afe684SRob Clark } 313c8afe684SRob Clark 314c8afe684SRob Clark if (!ret) 315c8afe684SRob Clark *iova = msm_obj->domain[id].iova; 316c8afe684SRob Clark 317c8afe684SRob Clark return ret; 318c8afe684SRob Clark } 319c8afe684SRob Clark 3202638d90aSRob Clark /* get iova, taking a reference. Should have a matching put */ 321c8afe684SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) 322c8afe684SRob Clark { 323edd4fc63SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 324c8afe684SRob Clark int ret; 325edd4fc63SRob Clark 326edd4fc63SRob Clark /* this is safe right now because we don't unmap until the 327edd4fc63SRob Clark * bo is deleted: 328edd4fc63SRob Clark */ 329edd4fc63SRob Clark if (msm_obj->domain[id].iova) { 330edd4fc63SRob Clark *iova = msm_obj->domain[id].iova; 331edd4fc63SRob Clark return 0; 332edd4fc63SRob Clark } 333edd4fc63SRob Clark 334c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 335c8afe684SRob Clark ret = msm_gem_get_iova_locked(obj, id, iova); 336c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 337c8afe684SRob Clark return ret; 338c8afe684SRob Clark } 339c8afe684SRob Clark 3402638d90aSRob Clark /* get iova without taking a reference, used in places where you have 3412638d90aSRob Clark * already done a 'msm_gem_get_iova()'. 3422638d90aSRob Clark */ 3432638d90aSRob Clark uint32_t msm_gem_iova(struct drm_gem_object *obj, int id) 3442638d90aSRob Clark { 3452638d90aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3462638d90aSRob Clark WARN_ON(!msm_obj->domain[id].iova); 3472638d90aSRob Clark return msm_obj->domain[id].iova; 3482638d90aSRob Clark } 3492638d90aSRob Clark 350c8afe684SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, int id) 351c8afe684SRob Clark { 352c8afe684SRob Clark // XXX TODO .. 353c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 354c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 355c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 356c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 357c8afe684SRob Clark // things that are no longer needed.. 358c8afe684SRob Clark } 359c8afe684SRob Clark 360c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 361c8afe684SRob Clark struct drm_mode_create_dumb *args) 362c8afe684SRob Clark { 363c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 364c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 365c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 366c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 367c8afe684SRob Clark } 368c8afe684SRob Clark 369c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 370c8afe684SRob Clark uint32_t handle, uint64_t *offset) 371c8afe684SRob Clark { 372c8afe684SRob Clark struct drm_gem_object *obj; 373c8afe684SRob Clark int ret = 0; 374c8afe684SRob Clark 375c8afe684SRob Clark /* GEM does all our handle to object mapping */ 376c8afe684SRob Clark obj = drm_gem_object_lookup(dev, file, handle); 377c8afe684SRob Clark if (obj == NULL) { 378c8afe684SRob Clark ret = -ENOENT; 379c8afe684SRob Clark goto fail; 380c8afe684SRob Clark } 381c8afe684SRob Clark 382c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 383c8afe684SRob Clark 384c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 385c8afe684SRob Clark 386c8afe684SRob Clark fail: 387c8afe684SRob Clark return ret; 388c8afe684SRob Clark } 389c8afe684SRob Clark 390c8afe684SRob Clark void *msm_gem_vaddr_locked(struct drm_gem_object *obj) 391c8afe684SRob Clark { 392c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 393c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 394c8afe684SRob Clark if (!msm_obj->vaddr) { 395c8afe684SRob Clark struct page **pages = get_pages(obj); 396c8afe684SRob Clark if (IS_ERR(pages)) 397c8afe684SRob Clark return ERR_CAST(pages); 398c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 399c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 400c8afe684SRob Clark } 401c8afe684SRob Clark return msm_obj->vaddr; 402c8afe684SRob Clark } 403c8afe684SRob Clark 404c8afe684SRob Clark void *msm_gem_vaddr(struct drm_gem_object *obj) 405c8afe684SRob Clark { 406c8afe684SRob Clark void *ret; 407c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 408c8afe684SRob Clark ret = msm_gem_vaddr_locked(obj); 409c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 410c8afe684SRob Clark return ret; 411c8afe684SRob Clark } 412c8afe684SRob Clark 413edd4fc63SRob Clark /* setup callback for when bo is no longer busy.. 414edd4fc63SRob Clark * TODO probably want to differentiate read vs write.. 415edd4fc63SRob Clark */ 416edd4fc63SRob Clark int msm_gem_queue_inactive_cb(struct drm_gem_object *obj, 417edd4fc63SRob Clark struct msm_fence_cb *cb) 418c8afe684SRob Clark { 4197198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 42069193e50SRob Clark uint32_t fence = msm_gem_fence(msm_obj, 42169193e50SRob Clark MSM_PREP_READ | MSM_PREP_WRITE); 42269193e50SRob Clark return msm_queue_fence_cb(obj->dev, cb, fence); 4237198e6b0SRob Clark } 4247198e6b0SRob Clark 4257198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 426bf6811f3SRob Clark struct msm_gpu *gpu, bool write, uint32_t fence) 4277198e6b0SRob Clark { 4287198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4297198e6b0SRob Clark msm_obj->gpu = gpu; 430bf6811f3SRob Clark if (write) 431bf6811f3SRob Clark msm_obj->write_fence = fence; 432bf6811f3SRob Clark else 433bf6811f3SRob Clark msm_obj->read_fence = fence; 4347198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4357198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 4367198e6b0SRob Clark } 4377198e6b0SRob Clark 4387198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 4397198e6b0SRob Clark { 4407198e6b0SRob Clark struct drm_device *dev = obj->dev; 4417198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 4427198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4437198e6b0SRob Clark 4447198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 4457198e6b0SRob Clark 4467198e6b0SRob Clark msm_obj->gpu = NULL; 447bf6811f3SRob Clark msm_obj->read_fence = 0; 448bf6811f3SRob Clark msm_obj->write_fence = 0; 4497198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4507198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 4517198e6b0SRob Clark } 4527198e6b0SRob Clark 45356c2da83SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 4547198e6b0SRob Clark { 4557198e6b0SRob Clark struct drm_device *dev = obj->dev; 4567198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4577198e6b0SRob Clark int ret = 0; 4587198e6b0SRob Clark 459f816f272SRob Clark if (is_active(msm_obj)) { 46069193e50SRob Clark uint32_t fence = msm_gem_fence(msm_obj, op); 461f816f272SRob Clark 462f816f272SRob Clark if (op & MSM_PREP_NOSYNC) 463f816f272SRob Clark timeout = NULL; 464f816f272SRob Clark 46599fc1bc4SWentao Xu ret = msm_wait_fence(dev, fence, timeout, true); 466bf6811f3SRob Clark } 4677198e6b0SRob Clark 4687198e6b0SRob Clark /* TODO cache maintenance */ 4697198e6b0SRob Clark 4707198e6b0SRob Clark return ret; 4717198e6b0SRob Clark } 4727198e6b0SRob Clark 4737198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 4747198e6b0SRob Clark { 4757198e6b0SRob Clark /* TODO cache maintenance */ 476c8afe684SRob Clark return 0; 477c8afe684SRob Clark } 478c8afe684SRob Clark 479c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 480c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 481c8afe684SRob Clark { 482c8afe684SRob Clark struct drm_device *dev = obj->dev; 483c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 484c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 485c8afe684SRob Clark 486c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 487fc99f97aSThierry Reding seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %zu\n", 4887198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 489bf6811f3SRob Clark msm_obj->read_fence, msm_obj->write_fence, 490bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 491c8afe684SRob Clark off, msm_obj->vaddr, obj->size); 492c8afe684SRob Clark } 493c8afe684SRob Clark 494c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 495c8afe684SRob Clark { 496c8afe684SRob Clark struct msm_gem_object *msm_obj; 497c8afe684SRob Clark int count = 0; 498c8afe684SRob Clark size_t size = 0; 499c8afe684SRob Clark 500c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 501c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 502c8afe684SRob Clark seq_printf(m, " "); 503c8afe684SRob Clark msm_gem_describe(obj, m); 504c8afe684SRob Clark count++; 505c8afe684SRob Clark size += obj->size; 506c8afe684SRob Clark } 507c8afe684SRob Clark 508c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 509c8afe684SRob Clark } 510c8afe684SRob Clark #endif 511c8afe684SRob Clark 512c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 513c8afe684SRob Clark { 514c8afe684SRob Clark struct drm_device *dev = obj->dev; 515871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 516c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 517c8afe684SRob Clark int id; 518c8afe684SRob Clark 519c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 520c8afe684SRob Clark 5217198e6b0SRob Clark /* object should not be on active list: */ 5227198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 5237198e6b0SRob Clark 524c8afe684SRob Clark list_del(&msm_obj->mm_list); 525c8afe684SRob Clark 526c8afe684SRob Clark for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { 527871d812aSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 528871d812aSRob Clark if (mmu && msm_obj->domain[id].iova) { 529257d06f7SRob Clark uint32_t offset = msm_obj->domain[id].iova; 530871d812aSRob Clark mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); 531c8afe684SRob Clark } 532c8afe684SRob Clark } 533c8afe684SRob Clark 53405b84911SRob Clark if (obj->import_attach) { 53505b84911SRob Clark if (msm_obj->vaddr) 53605b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 53705b84911SRob Clark 53805b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 53905b84911SRob Clark * ours, just free the array we allocated: 54005b84911SRob Clark */ 54105b84911SRob Clark if (msm_obj->pages) 54205b84911SRob Clark drm_free_large(msm_obj->pages); 54305b84911SRob Clark 544f28730c8Sjilai wang drm_prime_gem_destroy(obj, msm_obj->sgt); 54505b84911SRob Clark } else { 546c8afe684SRob Clark vunmap(msm_obj->vaddr); 547c8afe684SRob Clark put_pages(obj); 54805b84911SRob Clark } 549c8afe684SRob Clark 5507198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 5517198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 5527198e6b0SRob Clark 553c8afe684SRob Clark drm_gem_object_release(obj); 554c8afe684SRob Clark 555c8afe684SRob Clark kfree(msm_obj); 556c8afe684SRob Clark } 557c8afe684SRob Clark 558c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 559c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 560c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 561c8afe684SRob Clark { 562c8afe684SRob Clark struct drm_gem_object *obj; 563c8afe684SRob Clark int ret; 564c8afe684SRob Clark 565c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 566c8afe684SRob Clark if (ret) 567c8afe684SRob Clark return ret; 568c8afe684SRob Clark 569c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 570c8afe684SRob Clark 571c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 572c8afe684SRob Clark 573c8afe684SRob Clark if (IS_ERR(obj)) 574c8afe684SRob Clark return PTR_ERR(obj); 575c8afe684SRob Clark 576c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 577c8afe684SRob Clark 578c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 579c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 580c8afe684SRob Clark 581c8afe684SRob Clark return ret; 582c8afe684SRob Clark } 583c8afe684SRob Clark 58405b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 58505b84911SRob Clark uint32_t size, uint32_t flags, 58605b84911SRob Clark struct drm_gem_object **obj) 587c8afe684SRob Clark { 588c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 589c8afe684SRob Clark struct msm_gem_object *msm_obj; 590871d812aSRob Clark unsigned sz; 591072f1f91SRob Clark bool use_vram = false; 592c8afe684SRob Clark 593c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 594c8afe684SRob Clark case MSM_BO_UNCACHED: 595c8afe684SRob Clark case MSM_BO_CACHED: 596c8afe684SRob Clark case MSM_BO_WC: 597c8afe684SRob Clark break; 598c8afe684SRob Clark default: 599c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 600c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 60105b84911SRob Clark return -EINVAL; 602c8afe684SRob Clark } 603c8afe684SRob Clark 604871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 605072f1f91SRob Clark use_vram = true; 606072f1f91SRob Clark else if ((flags & MSM_BO_STOLEN) && priv->vram.size) 607072f1f91SRob Clark use_vram = true; 608072f1f91SRob Clark 609072f1f91SRob Clark if (WARN_ON(use_vram && !priv->vram.size)) 610072f1f91SRob Clark return -EINVAL; 611072f1f91SRob Clark 612072f1f91SRob Clark sz = sizeof(*msm_obj); 613072f1f91SRob Clark if (use_vram) 614871d812aSRob Clark sz += sizeof(struct drm_mm_node); 615871d812aSRob Clark 616871d812aSRob Clark msm_obj = kzalloc(sz, GFP_KERNEL); 61705b84911SRob Clark if (!msm_obj) 61805b84911SRob Clark return -ENOMEM; 619c8afe684SRob Clark 620072f1f91SRob Clark if (use_vram) 621871d812aSRob Clark msm_obj->vram_node = (void *)&msm_obj[1]; 622871d812aSRob Clark 623c8afe684SRob Clark msm_obj->flags = flags; 624c8afe684SRob Clark 6257198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 6267198e6b0SRob Clark reservation_object_init(msm_obj->resv); 627c8afe684SRob Clark 6287198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 629c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 630c8afe684SRob Clark 63105b84911SRob Clark *obj = &msm_obj->base; 63205b84911SRob Clark 63305b84911SRob Clark return 0; 63405b84911SRob Clark } 63505b84911SRob Clark 63605b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 63705b84911SRob Clark uint32_t size, uint32_t flags) 63805b84911SRob Clark { 639871d812aSRob Clark struct drm_gem_object *obj = NULL; 64005b84911SRob Clark int ret; 64105b84911SRob Clark 64205b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 64305b84911SRob Clark 64405b84911SRob Clark size = PAGE_ALIGN(size); 64505b84911SRob Clark 64605b84911SRob Clark ret = msm_gem_new_impl(dev, size, flags, &obj); 64705b84911SRob Clark if (ret) 64805b84911SRob Clark goto fail; 64905b84911SRob Clark 650072f1f91SRob Clark if (use_pages(obj)) { 65105b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 65205b84911SRob Clark if (ret) 65305b84911SRob Clark goto fail; 654871d812aSRob Clark } else { 655871d812aSRob Clark drm_gem_private_object_init(dev, obj, size); 656871d812aSRob Clark } 65705b84911SRob Clark 65805b84911SRob Clark return obj; 65905b84911SRob Clark 66005b84911SRob Clark fail: 66105b84911SRob Clark if (obj) 6629999f105SRob Clark drm_gem_object_unreference(obj); 66305b84911SRob Clark 66405b84911SRob Clark return ERR_PTR(ret); 66505b84911SRob Clark } 66605b84911SRob Clark 66705b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 66805b84911SRob Clark uint32_t size, struct sg_table *sgt) 66905b84911SRob Clark { 67005b84911SRob Clark struct msm_gem_object *msm_obj; 67105b84911SRob Clark struct drm_gem_object *obj; 67205b84911SRob Clark int ret, npages; 67305b84911SRob Clark 674871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 675871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 676871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 677871d812aSRob Clark return ERR_PTR(-EINVAL); 678871d812aSRob Clark } 679871d812aSRob Clark 68005b84911SRob Clark size = PAGE_ALIGN(size); 68105b84911SRob Clark 68205b84911SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); 68305b84911SRob Clark if (ret) 68405b84911SRob Clark goto fail; 68505b84911SRob Clark 68605b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 68705b84911SRob Clark 68805b84911SRob Clark npages = size / PAGE_SIZE; 68905b84911SRob Clark 69005b84911SRob Clark msm_obj = to_msm_bo(obj); 69105b84911SRob Clark msm_obj->sgt = sgt; 69205b84911SRob Clark msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); 69305b84911SRob Clark if (!msm_obj->pages) { 69405b84911SRob Clark ret = -ENOMEM; 69505b84911SRob Clark goto fail; 69605b84911SRob Clark } 69705b84911SRob Clark 69805b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 69905b84911SRob Clark if (ret) 70005b84911SRob Clark goto fail; 70105b84911SRob Clark 702c8afe684SRob Clark return obj; 703c8afe684SRob Clark 704c8afe684SRob Clark fail: 705c8afe684SRob Clark if (obj) 706c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 707c8afe684SRob Clark 708c8afe684SRob Clark return ERR_PTR(ret); 709c8afe684SRob Clark } 710