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 */ 377c8afe684SRob Clark obj = drm_gem_object_lookup(dev, 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)); 401c8afe684SRob Clark } 402c8afe684SRob Clark return msm_obj->vaddr; 403c8afe684SRob Clark } 404c8afe684SRob Clark 405c8afe684SRob Clark void *msm_gem_vaddr(struct drm_gem_object *obj) 406c8afe684SRob Clark { 407c8afe684SRob Clark void *ret; 408c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 409c8afe684SRob Clark ret = msm_gem_vaddr_locked(obj); 410c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 411c8afe684SRob Clark return ret; 412c8afe684SRob Clark } 413c8afe684SRob Clark 414edd4fc63SRob Clark /* setup callback for when bo is no longer busy.. 415edd4fc63SRob Clark * TODO probably want to differentiate read vs write.. 416edd4fc63SRob Clark */ 417edd4fc63SRob Clark int msm_gem_queue_inactive_cb(struct drm_gem_object *obj, 418edd4fc63SRob Clark struct msm_fence_cb *cb) 419c8afe684SRob Clark { 4207198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 42169193e50SRob Clark uint32_t fence = msm_gem_fence(msm_obj, 42269193e50SRob Clark MSM_PREP_READ | MSM_PREP_WRITE); 42369193e50SRob Clark return msm_queue_fence_cb(obj->dev, cb, fence); 4247198e6b0SRob Clark } 4257198e6b0SRob Clark 4267198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 427bf6811f3SRob Clark struct msm_gpu *gpu, bool write, uint32_t fence) 4287198e6b0SRob Clark { 4297198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4307198e6b0SRob Clark msm_obj->gpu = gpu; 431bf6811f3SRob Clark if (write) 432bf6811f3SRob Clark msm_obj->write_fence = fence; 433bf6811f3SRob Clark else 434bf6811f3SRob Clark msm_obj->read_fence = fence; 4357198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4367198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 4377198e6b0SRob Clark } 4387198e6b0SRob Clark 4397198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 4407198e6b0SRob Clark { 4417198e6b0SRob Clark struct drm_device *dev = obj->dev; 4427198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 4437198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4447198e6b0SRob Clark 4457198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 4467198e6b0SRob Clark 4477198e6b0SRob Clark msm_obj->gpu = NULL; 448bf6811f3SRob Clark msm_obj->read_fence = 0; 449bf6811f3SRob Clark msm_obj->write_fence = 0; 4507198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4517198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 4527198e6b0SRob Clark } 4537198e6b0SRob Clark 45456c2da83SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 4557198e6b0SRob Clark { 4567198e6b0SRob Clark struct drm_device *dev = obj->dev; 4577198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4587198e6b0SRob Clark int ret = 0; 4597198e6b0SRob Clark 460f816f272SRob Clark if (is_active(msm_obj)) { 46169193e50SRob Clark uint32_t fence = msm_gem_fence(msm_obj, op); 462f816f272SRob Clark 463f816f272SRob Clark if (op & MSM_PREP_NOSYNC) 464f816f272SRob Clark timeout = NULL; 465f816f272SRob Clark 46699fc1bc4SWentao Xu ret = msm_wait_fence(dev, fence, timeout, true); 467bf6811f3SRob Clark } 4687198e6b0SRob Clark 4697198e6b0SRob Clark /* TODO cache maintenance */ 4707198e6b0SRob Clark 4717198e6b0SRob Clark return ret; 4727198e6b0SRob Clark } 4737198e6b0SRob Clark 4747198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 4757198e6b0SRob Clark { 4767198e6b0SRob Clark /* TODO cache maintenance */ 477c8afe684SRob Clark return 0; 478c8afe684SRob Clark } 479c8afe684SRob Clark 480c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 481c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 482c8afe684SRob Clark { 483c8afe684SRob Clark struct drm_device *dev = obj->dev; 484c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 485c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 486c8afe684SRob Clark 487c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 488fc99f97aSThierry Reding seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %zu\n", 4897198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 490bf6811f3SRob Clark msm_obj->read_fence, msm_obj->write_fence, 491bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 492c8afe684SRob Clark off, msm_obj->vaddr, obj->size); 493c8afe684SRob Clark } 494c8afe684SRob Clark 495c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 496c8afe684SRob Clark { 497c8afe684SRob Clark struct msm_gem_object *msm_obj; 498c8afe684SRob Clark int count = 0; 499c8afe684SRob Clark size_t size = 0; 500c8afe684SRob Clark 501c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 502c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 503c8afe684SRob Clark seq_printf(m, " "); 504c8afe684SRob Clark msm_gem_describe(obj, m); 505c8afe684SRob Clark count++; 506c8afe684SRob Clark size += obj->size; 507c8afe684SRob Clark } 508c8afe684SRob Clark 509c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 510c8afe684SRob Clark } 511c8afe684SRob Clark #endif 512c8afe684SRob Clark 513c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 514c8afe684SRob Clark { 515c8afe684SRob Clark struct drm_device *dev = obj->dev; 516871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 517c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 518c8afe684SRob Clark int id; 519c8afe684SRob Clark 520c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 521c8afe684SRob Clark 5227198e6b0SRob Clark /* object should not be on active list: */ 5237198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 5247198e6b0SRob Clark 525c8afe684SRob Clark list_del(&msm_obj->mm_list); 526c8afe684SRob Clark 527c8afe684SRob Clark for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { 528871d812aSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 529871d812aSRob Clark if (mmu && msm_obj->domain[id].iova) { 530257d06f7SRob Clark uint32_t offset = msm_obj->domain[id].iova; 531871d812aSRob Clark mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); 532c8afe684SRob Clark } 533c8afe684SRob Clark } 534c8afe684SRob Clark 53505b84911SRob Clark if (obj->import_attach) { 53605b84911SRob Clark if (msm_obj->vaddr) 53705b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 53805b84911SRob Clark 53905b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 54005b84911SRob Clark * ours, just free the array we allocated: 54105b84911SRob Clark */ 54205b84911SRob Clark if (msm_obj->pages) 54305b84911SRob Clark drm_free_large(msm_obj->pages); 54405b84911SRob Clark 545f28730c8Sjilai wang drm_prime_gem_destroy(obj, msm_obj->sgt); 54605b84911SRob Clark } else { 547c8afe684SRob Clark vunmap(msm_obj->vaddr); 548c8afe684SRob Clark put_pages(obj); 54905b84911SRob Clark } 550c8afe684SRob Clark 5517198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 5527198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 5537198e6b0SRob Clark 554c8afe684SRob Clark drm_gem_object_release(obj); 555c8afe684SRob Clark 556c8afe684SRob Clark kfree(msm_obj); 557c8afe684SRob Clark } 558c8afe684SRob Clark 559c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 560c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 561c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 562c8afe684SRob Clark { 563c8afe684SRob Clark struct drm_gem_object *obj; 564c8afe684SRob Clark int ret; 565c8afe684SRob Clark 566c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 567c8afe684SRob Clark if (ret) 568c8afe684SRob Clark return ret; 569c8afe684SRob Clark 570c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 571c8afe684SRob Clark 572c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 573c8afe684SRob Clark 574c8afe684SRob Clark if (IS_ERR(obj)) 575c8afe684SRob Clark return PTR_ERR(obj); 576c8afe684SRob Clark 577c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 578c8afe684SRob Clark 579c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 580c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 581c8afe684SRob Clark 582c8afe684SRob Clark return ret; 583c8afe684SRob Clark } 584c8afe684SRob Clark 58505b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 58605b84911SRob Clark uint32_t size, uint32_t flags, 58779f0e202SRob Clark struct reservation_object *resv, 58805b84911SRob Clark struct drm_gem_object **obj) 589c8afe684SRob Clark { 590c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 591c8afe684SRob Clark struct msm_gem_object *msm_obj; 592871d812aSRob Clark unsigned sz; 593072f1f91SRob Clark bool use_vram = false; 594c8afe684SRob Clark 595c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 596c8afe684SRob Clark case MSM_BO_UNCACHED: 597c8afe684SRob Clark case MSM_BO_CACHED: 598c8afe684SRob Clark case MSM_BO_WC: 599c8afe684SRob Clark break; 600c8afe684SRob Clark default: 601c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 602c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 60305b84911SRob Clark return -EINVAL; 604c8afe684SRob Clark } 605c8afe684SRob Clark 606871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 607072f1f91SRob Clark use_vram = true; 608072f1f91SRob Clark else if ((flags & MSM_BO_STOLEN) && priv->vram.size) 609072f1f91SRob Clark use_vram = true; 610072f1f91SRob Clark 611072f1f91SRob Clark if (WARN_ON(use_vram && !priv->vram.size)) 612072f1f91SRob Clark return -EINVAL; 613072f1f91SRob Clark 614072f1f91SRob Clark sz = sizeof(*msm_obj); 615072f1f91SRob Clark if (use_vram) 616871d812aSRob Clark sz += sizeof(struct drm_mm_node); 617871d812aSRob Clark 618871d812aSRob Clark msm_obj = kzalloc(sz, GFP_KERNEL); 61905b84911SRob Clark if (!msm_obj) 62005b84911SRob Clark return -ENOMEM; 621c8afe684SRob Clark 622072f1f91SRob Clark if (use_vram) 623871d812aSRob Clark msm_obj->vram_node = (void *)&msm_obj[1]; 624871d812aSRob Clark 625c8afe684SRob Clark msm_obj->flags = flags; 626c8afe684SRob Clark 62779f0e202SRob Clark if (resv) { 62879f0e202SRob Clark msm_obj->resv = resv; 62979f0e202SRob Clark } else { 6307198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 6317198e6b0SRob Clark reservation_object_init(msm_obj->resv); 63279f0e202SRob Clark } 633c8afe684SRob Clark 6347198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 635c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 636c8afe684SRob Clark 63705b84911SRob Clark *obj = &msm_obj->base; 63805b84911SRob Clark 63905b84911SRob Clark return 0; 64005b84911SRob Clark } 64105b84911SRob Clark 64205b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 64305b84911SRob Clark uint32_t size, uint32_t flags) 64405b84911SRob Clark { 645871d812aSRob Clark struct drm_gem_object *obj = NULL; 64605b84911SRob Clark int ret; 64705b84911SRob Clark 64805b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 64905b84911SRob Clark 65005b84911SRob Clark size = PAGE_ALIGN(size); 65105b84911SRob Clark 65279f0e202SRob Clark ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); 65305b84911SRob Clark if (ret) 65405b84911SRob Clark goto fail; 65505b84911SRob Clark 656072f1f91SRob Clark if (use_pages(obj)) { 65705b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 65805b84911SRob Clark if (ret) 65905b84911SRob Clark goto fail; 660871d812aSRob Clark } else { 661871d812aSRob Clark drm_gem_private_object_init(dev, obj, size); 662871d812aSRob Clark } 66305b84911SRob Clark 66405b84911SRob Clark return obj; 66505b84911SRob Clark 66605b84911SRob Clark fail: 66705b84911SRob Clark if (obj) 6689999f105SRob Clark drm_gem_object_unreference(obj); 66905b84911SRob Clark 67005b84911SRob Clark return ERR_PTR(ret); 67105b84911SRob Clark } 67205b84911SRob Clark 67305b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 67479f0e202SRob Clark struct dma_buf *dmabuf, struct sg_table *sgt) 67505b84911SRob Clark { 67605b84911SRob Clark struct msm_gem_object *msm_obj; 67705b84911SRob Clark struct drm_gem_object *obj; 67879f0e202SRob Clark uint32_t size; 67905b84911SRob Clark int ret, npages; 68005b84911SRob Clark 681871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 682871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 683871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 684871d812aSRob Clark return ERR_PTR(-EINVAL); 685871d812aSRob Clark } 686871d812aSRob Clark 68779f0e202SRob Clark size = PAGE_ALIGN(dmabuf->size); 68805b84911SRob Clark 68979f0e202SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj); 69005b84911SRob Clark if (ret) 69105b84911SRob Clark goto fail; 69205b84911SRob Clark 69305b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 69405b84911SRob Clark 69505b84911SRob Clark npages = size / PAGE_SIZE; 69605b84911SRob Clark 69705b84911SRob Clark msm_obj = to_msm_bo(obj); 69805b84911SRob Clark msm_obj->sgt = sgt; 69905b84911SRob Clark msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); 70005b84911SRob Clark if (!msm_obj->pages) { 70105b84911SRob Clark ret = -ENOMEM; 70205b84911SRob Clark goto fail; 70305b84911SRob Clark } 70405b84911SRob Clark 70505b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 70605b84911SRob Clark if (ret) 70705b84911SRob Clark goto fail; 70805b84911SRob Clark 709c8afe684SRob Clark return obj; 710c8afe684SRob Clark 711c8afe684SRob Clark fail: 712c8afe684SRob Clark if (obj) 713c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 714c8afe684SRob Clark 715c8afe684SRob Clark return ERR_PTR(ret); 716c8afe684SRob Clark } 717