1c8afe684SRob Clark /* 2c8afe684SRob Clark * Copyright (C) 2013 Red Hat 3c8afe684SRob Clark * Author: Rob Clark <robdclark@gmail.com> 4c8afe684SRob Clark * 5c8afe684SRob Clark * This program is free software; you can redistribute it and/or modify it 6c8afe684SRob Clark * under the terms of the GNU General Public License version 2 as published by 7c8afe684SRob Clark * the Free Software Foundation. 8c8afe684SRob Clark * 9c8afe684SRob Clark * This program is distributed in the hope that it will be useful, but WITHOUT 10c8afe684SRob Clark * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11c8afe684SRob Clark * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12c8afe684SRob Clark * more details. 13c8afe684SRob Clark * 14c8afe684SRob Clark * You should have received a copy of the GNU General Public License along with 15c8afe684SRob Clark * this program. If not, see <http://www.gnu.org/licenses/>. 16c8afe684SRob Clark */ 17c8afe684SRob Clark 18c8afe684SRob Clark #include <linux/spinlock.h> 19c8afe684SRob Clark #include <linux/shmem_fs.h> 2005b84911SRob Clark #include <linux/dma-buf.h> 21c8afe684SRob Clark 22c8afe684SRob Clark #include "msm_drv.h" 23c8afe684SRob Clark #include "msm_gem.h" 247198e6b0SRob Clark #include "msm_gpu.h" 25871d812aSRob Clark #include "msm_mmu.h" 26c8afe684SRob Clark 27871d812aSRob Clark static dma_addr_t physaddr(struct drm_gem_object *obj) 28871d812aSRob Clark { 29871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 30871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 31871d812aSRob Clark return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + 32871d812aSRob Clark priv->vram.paddr; 33871d812aSRob Clark } 34871d812aSRob Clark 35871d812aSRob Clark /* allocate pages from VRAM carveout, used when no IOMMU: */ 36871d812aSRob Clark static struct page **get_pages_vram(struct drm_gem_object *obj, 37871d812aSRob Clark int npages) 38871d812aSRob Clark { 39871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 40871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 41871d812aSRob Clark dma_addr_t paddr; 42871d812aSRob Clark struct page **p; 43871d812aSRob Clark int ret, i; 44871d812aSRob Clark 45871d812aSRob Clark p = drm_malloc_ab(npages, sizeof(struct page *)); 46871d812aSRob Clark if (!p) 47871d812aSRob Clark return ERR_PTR(-ENOMEM); 48871d812aSRob Clark 49871d812aSRob Clark ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, 50871d812aSRob Clark npages, 0, DRM_MM_SEARCH_DEFAULT); 51871d812aSRob Clark if (ret) { 52871d812aSRob Clark drm_free_large(p); 53871d812aSRob Clark return ERR_PTR(ret); 54871d812aSRob Clark } 55871d812aSRob Clark 56871d812aSRob Clark paddr = physaddr(obj); 57871d812aSRob Clark for (i = 0; i < npages; i++) { 58871d812aSRob Clark p[i] = phys_to_page(paddr); 59871d812aSRob Clark paddr += PAGE_SIZE; 60871d812aSRob Clark } 61871d812aSRob Clark 62871d812aSRob Clark return p; 63871d812aSRob Clark } 64c8afe684SRob Clark 65c8afe684SRob Clark /* called with dev->struct_mutex held */ 66c8afe684SRob Clark static struct page **get_pages(struct drm_gem_object *obj) 67c8afe684SRob Clark { 68c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 69c8afe684SRob Clark 70c8afe684SRob Clark if (!msm_obj->pages) { 71c8afe684SRob Clark struct drm_device *dev = obj->dev; 72871d812aSRob Clark struct page **p; 73c8afe684SRob Clark int npages = obj->size >> PAGE_SHIFT; 74c8afe684SRob Clark 75871d812aSRob Clark if (iommu_present(&platform_bus_type)) 760cdbe8acSDavid Herrmann p = drm_gem_get_pages(obj); 77871d812aSRob Clark else 78871d812aSRob Clark p = get_pages_vram(obj, npages); 79871d812aSRob Clark 80c8afe684SRob Clark if (IS_ERR(p)) { 81c8afe684SRob Clark dev_err(dev->dev, "could not get pages: %ld\n", 82c8afe684SRob Clark PTR_ERR(p)); 83c8afe684SRob Clark return p; 84c8afe684SRob Clark } 85c8afe684SRob Clark 86c8afe684SRob Clark msm_obj->sgt = drm_prime_pages_to_sg(p, npages); 871f70e079SWei Yongjun if (IS_ERR(msm_obj->sgt)) { 88c8afe684SRob Clark dev_err(dev->dev, "failed to allocate sgt\n"); 891f70e079SWei Yongjun return ERR_CAST(msm_obj->sgt); 90c8afe684SRob Clark } 91c8afe684SRob Clark 92c8afe684SRob Clark msm_obj->pages = p; 93c8afe684SRob Clark 94c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 95c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 96c8afe684SRob Clark */ 97c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 98c8afe684SRob Clark dma_map_sg(dev->dev, msm_obj->sgt->sgl, 99c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 100c8afe684SRob Clark } 101c8afe684SRob Clark 102c8afe684SRob Clark return msm_obj->pages; 103c8afe684SRob Clark } 104c8afe684SRob Clark 105c8afe684SRob Clark static void put_pages(struct drm_gem_object *obj) 106c8afe684SRob Clark { 107c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 108c8afe684SRob Clark 109c8afe684SRob Clark if (msm_obj->pages) { 110c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 111c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 112c8afe684SRob Clark */ 113c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 114c8afe684SRob Clark dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, 115c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 116c8afe684SRob Clark sg_free_table(msm_obj->sgt); 117c8afe684SRob Clark kfree(msm_obj->sgt); 118c8afe684SRob Clark 119871d812aSRob Clark if (iommu_present(&platform_bus_type)) 120c8afe684SRob Clark drm_gem_put_pages(obj, msm_obj->pages, true, false); 1211ffa2425SMicah Richert else { 122871d812aSRob Clark drm_mm_remove_node(msm_obj->vram_node); 1231ffa2425SMicah Richert drm_free_large(msm_obj->pages); 1241ffa2425SMicah Richert } 125871d812aSRob Clark 126c8afe684SRob Clark msm_obj->pages = NULL; 127c8afe684SRob Clark } 128c8afe684SRob Clark } 129c8afe684SRob Clark 13005b84911SRob Clark struct page **msm_gem_get_pages(struct drm_gem_object *obj) 13105b84911SRob Clark { 13205b84911SRob Clark struct drm_device *dev = obj->dev; 13305b84911SRob Clark struct page **p; 13405b84911SRob Clark mutex_lock(&dev->struct_mutex); 13505b84911SRob Clark p = get_pages(obj); 13605b84911SRob Clark mutex_unlock(&dev->struct_mutex); 13705b84911SRob Clark return p; 13805b84911SRob Clark } 13905b84911SRob Clark 14005b84911SRob Clark void msm_gem_put_pages(struct drm_gem_object *obj) 14105b84911SRob Clark { 14205b84911SRob Clark /* when we start tracking the pin count, then do something here */ 14305b84911SRob Clark } 14405b84911SRob Clark 145c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 146c8afe684SRob Clark struct vm_area_struct *vma) 147c8afe684SRob Clark { 148c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 149c8afe684SRob Clark 150c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 151c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 152c8afe684SRob Clark 153c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 154c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 155c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 156c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 157c8afe684SRob Clark } else { 158c8afe684SRob Clark /* 159c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 160c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 161c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 162c8afe684SRob Clark */ 163c8afe684SRob Clark fput(vma->vm_file); 164c8afe684SRob Clark get_file(obj->filp); 165c8afe684SRob Clark vma->vm_pgoff = 0; 166c8afe684SRob Clark vma->vm_file = obj->filp; 167c8afe684SRob Clark 168c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 169c8afe684SRob Clark } 170c8afe684SRob Clark 171c8afe684SRob Clark return 0; 172c8afe684SRob Clark } 173c8afe684SRob Clark 174c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 175c8afe684SRob Clark { 176c8afe684SRob Clark int ret; 177c8afe684SRob Clark 178c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 179c8afe684SRob Clark if (ret) { 180c8afe684SRob Clark DBG("mmap failed: %d", ret); 181c8afe684SRob Clark return ret; 182c8afe684SRob Clark } 183c8afe684SRob Clark 184c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 185c8afe684SRob Clark } 186c8afe684SRob Clark 187c8afe684SRob Clark int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 188c8afe684SRob Clark { 189c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 190c8afe684SRob Clark struct drm_device *dev = obj->dev; 191c8afe684SRob Clark struct page **pages; 192c8afe684SRob Clark unsigned long pfn; 193c8afe684SRob Clark pgoff_t pgoff; 194c8afe684SRob Clark int ret; 195c8afe684SRob Clark 196c8afe684SRob Clark /* Make sure we don't parallel update on a fault, nor move or remove 197c8afe684SRob Clark * something from beneath our feet 198c8afe684SRob Clark */ 199c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 200c8afe684SRob Clark if (ret) 201c8afe684SRob Clark goto out; 202c8afe684SRob Clark 203c8afe684SRob Clark /* make sure we have pages attached now */ 204c8afe684SRob Clark pages = get_pages(obj); 205c8afe684SRob Clark if (IS_ERR(pages)) { 206c8afe684SRob Clark ret = PTR_ERR(pages); 207c8afe684SRob Clark goto out_unlock; 208c8afe684SRob Clark } 209c8afe684SRob Clark 210c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 211c8afe684SRob Clark pgoff = ((unsigned long)vmf->virtual_address - 212c8afe684SRob Clark vma->vm_start) >> PAGE_SHIFT; 213c8afe684SRob Clark 214871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 215c8afe684SRob Clark 216c8afe684SRob Clark VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, 217c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 218c8afe684SRob Clark 219c8afe684SRob Clark ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn); 220c8afe684SRob Clark 221c8afe684SRob Clark out_unlock: 222c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 223c8afe684SRob Clark out: 224c8afe684SRob Clark switch (ret) { 225c8afe684SRob Clark case -EAGAIN: 226c8afe684SRob Clark case 0: 227c8afe684SRob Clark case -ERESTARTSYS: 228c8afe684SRob Clark case -EINTR: 229505886d5SRob Clark case -EBUSY: 230505886d5SRob Clark /* 231505886d5SRob Clark * EBUSY is ok: this just means that another thread 232505886d5SRob Clark * already did the job. 233505886d5SRob Clark */ 234c8afe684SRob Clark return VM_FAULT_NOPAGE; 235c8afe684SRob Clark case -ENOMEM: 236c8afe684SRob Clark return VM_FAULT_OOM; 237c8afe684SRob Clark default: 238c8afe684SRob Clark return VM_FAULT_SIGBUS; 239c8afe684SRob Clark } 240c8afe684SRob Clark } 241c8afe684SRob Clark 242c8afe684SRob Clark /** get mmap offset */ 243c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 244c8afe684SRob Clark { 245c8afe684SRob Clark struct drm_device *dev = obj->dev; 246c8afe684SRob Clark int ret; 247c8afe684SRob Clark 248c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 249c8afe684SRob Clark 250c8afe684SRob Clark /* Make it mmapable */ 251c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 252c8afe684SRob Clark 253c8afe684SRob Clark if (ret) { 254c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 255c8afe684SRob Clark return 0; 256c8afe684SRob Clark } 257c8afe684SRob Clark 258c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 259c8afe684SRob Clark } 260c8afe684SRob Clark 261c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 262c8afe684SRob Clark { 263c8afe684SRob Clark uint64_t offset; 264c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 265c8afe684SRob Clark offset = mmap_offset(obj); 266c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 267c8afe684SRob Clark return offset; 268c8afe684SRob Clark } 269c8afe684SRob Clark 270c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 271c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 272c8afe684SRob Clark * iova ref if you know one is already held. 273c8afe684SRob Clark * 274c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 275c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 276c8afe684SRob Clark */ 277c8afe684SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, 278c8afe684SRob Clark uint32_t *iova) 279c8afe684SRob Clark { 280c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 281c8afe684SRob Clark int ret = 0; 282c8afe684SRob Clark 283c8afe684SRob Clark if (!msm_obj->domain[id].iova) { 284c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 285871d812aSRob Clark struct page **pages = get_pages(obj); 286871d812aSRob Clark 287c8afe684SRob Clark if (IS_ERR(pages)) 288c8afe684SRob Clark return PTR_ERR(pages); 289871d812aSRob Clark 290871d812aSRob Clark if (iommu_present(&platform_bus_type)) { 2911c4997feSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 2921c4997feSRob Clark uint32_t offset; 2931c4997feSRob Clark 2941c4997feSRob Clark if (WARN_ON(!mmu)) 2951c4997feSRob Clark return -EINVAL; 2961c4997feSRob Clark 2971c4997feSRob Clark offset = (uint32_t)mmap_offset(obj); 298871d812aSRob Clark ret = mmu->funcs->map(mmu, offset, msm_obj->sgt, 299c8afe684SRob Clark obj->size, IOMMU_READ | IOMMU_WRITE); 300c8afe684SRob Clark msm_obj->domain[id].iova = offset; 301871d812aSRob Clark } else { 302871d812aSRob Clark msm_obj->domain[id].iova = physaddr(obj); 303871d812aSRob Clark } 304c8afe684SRob Clark } 305c8afe684SRob Clark 306c8afe684SRob Clark if (!ret) 307c8afe684SRob Clark *iova = msm_obj->domain[id].iova; 308c8afe684SRob Clark 309c8afe684SRob Clark return ret; 310c8afe684SRob Clark } 311c8afe684SRob Clark 312c8afe684SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) 313c8afe684SRob Clark { 314edd4fc63SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 315c8afe684SRob Clark int ret; 316edd4fc63SRob Clark 317edd4fc63SRob Clark /* this is safe right now because we don't unmap until the 318edd4fc63SRob Clark * bo is deleted: 319edd4fc63SRob Clark */ 320edd4fc63SRob Clark if (msm_obj->domain[id].iova) { 321edd4fc63SRob Clark *iova = msm_obj->domain[id].iova; 322edd4fc63SRob Clark return 0; 323edd4fc63SRob Clark } 324edd4fc63SRob Clark 325c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 326c8afe684SRob Clark ret = msm_gem_get_iova_locked(obj, id, iova); 327c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 328c8afe684SRob Clark return ret; 329c8afe684SRob Clark } 330c8afe684SRob Clark 331c8afe684SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, int id) 332c8afe684SRob Clark { 333c8afe684SRob Clark // XXX TODO .. 334c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 335c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 336c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 337c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 338c8afe684SRob Clark // things that are no longer needed.. 339c8afe684SRob Clark } 340c8afe684SRob Clark 341c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 342c8afe684SRob Clark struct drm_mode_create_dumb *args) 343c8afe684SRob Clark { 344c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 345c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 346c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 347c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 348c8afe684SRob Clark } 349c8afe684SRob Clark 350c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 351c8afe684SRob Clark uint32_t handle, uint64_t *offset) 352c8afe684SRob Clark { 353c8afe684SRob Clark struct drm_gem_object *obj; 354c8afe684SRob Clark int ret = 0; 355c8afe684SRob Clark 356c8afe684SRob Clark /* GEM does all our handle to object mapping */ 357c8afe684SRob Clark obj = drm_gem_object_lookup(dev, file, handle); 358c8afe684SRob Clark if (obj == NULL) { 359c8afe684SRob Clark ret = -ENOENT; 360c8afe684SRob Clark goto fail; 361c8afe684SRob Clark } 362c8afe684SRob Clark 363c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 364c8afe684SRob Clark 365c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 366c8afe684SRob Clark 367c8afe684SRob Clark fail: 368c8afe684SRob Clark return ret; 369c8afe684SRob Clark } 370c8afe684SRob Clark 371c8afe684SRob Clark void *msm_gem_vaddr_locked(struct drm_gem_object *obj) 372c8afe684SRob Clark { 373c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 374c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 375c8afe684SRob Clark if (!msm_obj->vaddr) { 376c8afe684SRob Clark struct page **pages = get_pages(obj); 377c8afe684SRob Clark if (IS_ERR(pages)) 378c8afe684SRob Clark return ERR_CAST(pages); 379c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 380c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 381c8afe684SRob Clark } 382c8afe684SRob Clark return msm_obj->vaddr; 383c8afe684SRob Clark } 384c8afe684SRob Clark 385c8afe684SRob Clark void *msm_gem_vaddr(struct drm_gem_object *obj) 386c8afe684SRob Clark { 387c8afe684SRob Clark void *ret; 388c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 389c8afe684SRob Clark ret = msm_gem_vaddr_locked(obj); 390c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 391c8afe684SRob Clark return ret; 392c8afe684SRob Clark } 393c8afe684SRob Clark 394edd4fc63SRob Clark /* setup callback for when bo is no longer busy.. 395edd4fc63SRob Clark * TODO probably want to differentiate read vs write.. 396edd4fc63SRob Clark */ 397edd4fc63SRob Clark int msm_gem_queue_inactive_cb(struct drm_gem_object *obj, 398edd4fc63SRob Clark struct msm_fence_cb *cb) 399c8afe684SRob Clark { 400c8afe684SRob Clark struct drm_device *dev = obj->dev; 401c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 4027198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4037198e6b0SRob Clark int ret = 0; 404c8afe684SRob Clark 4057198e6b0SRob Clark mutex_lock(&dev->struct_mutex); 406edd4fc63SRob Clark if (!list_empty(&cb->work.entry)) { 4077198e6b0SRob Clark ret = -EINVAL; 4087198e6b0SRob Clark } else if (is_active(msm_obj)) { 409edd4fc63SRob Clark cb->fence = max(msm_obj->read_fence, msm_obj->write_fence); 410edd4fc63SRob Clark list_add_tail(&cb->work.entry, &priv->fence_cbs); 4117198e6b0SRob Clark } else { 412edd4fc63SRob Clark queue_work(priv->wq, &cb->work); 4137198e6b0SRob Clark } 4147198e6b0SRob Clark mutex_unlock(&dev->struct_mutex); 415c8afe684SRob Clark 4167198e6b0SRob Clark return ret; 4177198e6b0SRob Clark } 4187198e6b0SRob Clark 4197198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 420bf6811f3SRob Clark struct msm_gpu *gpu, bool write, uint32_t fence) 4217198e6b0SRob Clark { 4227198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4237198e6b0SRob Clark msm_obj->gpu = gpu; 424bf6811f3SRob Clark if (write) 425bf6811f3SRob Clark msm_obj->write_fence = fence; 426bf6811f3SRob Clark else 427bf6811f3SRob Clark msm_obj->read_fence = fence; 4287198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4297198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 4307198e6b0SRob Clark } 4317198e6b0SRob Clark 4327198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 4337198e6b0SRob Clark { 4347198e6b0SRob Clark struct drm_device *dev = obj->dev; 4357198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 4367198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4377198e6b0SRob Clark 4387198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 4397198e6b0SRob Clark 4407198e6b0SRob Clark msm_obj->gpu = NULL; 441bf6811f3SRob Clark msm_obj->read_fence = 0; 442bf6811f3SRob Clark msm_obj->write_fence = 0; 4437198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4447198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 4457198e6b0SRob Clark } 4467198e6b0SRob Clark 4477198e6b0SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, 4487198e6b0SRob Clark struct timespec *timeout) 4497198e6b0SRob Clark { 4507198e6b0SRob Clark struct drm_device *dev = obj->dev; 4517198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4527198e6b0SRob Clark int ret = 0; 4537198e6b0SRob Clark 454f816f272SRob Clark if (is_active(msm_obj)) { 455bf6811f3SRob Clark uint32_t fence = 0; 456f816f272SRob Clark 457bf6811f3SRob Clark if (op & MSM_PREP_READ) 458bf6811f3SRob Clark fence = msm_obj->write_fence; 459bf6811f3SRob Clark if (op & MSM_PREP_WRITE) 460bf6811f3SRob Clark fence = max(fence, msm_obj->read_fence); 461f816f272SRob Clark if (op & MSM_PREP_NOSYNC) 462f816f272SRob Clark timeout = NULL; 463f816f272SRob Clark 464bf6811f3SRob Clark ret = msm_wait_fence_interruptable(dev, fence, timeout); 465bf6811f3SRob Clark } 4667198e6b0SRob Clark 4677198e6b0SRob Clark /* TODO cache maintenance */ 4687198e6b0SRob Clark 4697198e6b0SRob Clark return ret; 4707198e6b0SRob Clark } 4717198e6b0SRob Clark 4727198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 4737198e6b0SRob Clark { 4747198e6b0SRob Clark /* TODO cache maintenance */ 475c8afe684SRob Clark return 0; 476c8afe684SRob Clark } 477c8afe684SRob Clark 478c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 479c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 480c8afe684SRob Clark { 481c8afe684SRob Clark struct drm_device *dev = obj->dev; 482c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 483c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 484c8afe684SRob Clark 485c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 486bf6811f3SRob Clark seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %d\n", 4877198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 488bf6811f3SRob Clark msm_obj->read_fence, msm_obj->write_fence, 489bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 490c8afe684SRob Clark off, msm_obj->vaddr, obj->size); 491c8afe684SRob Clark } 492c8afe684SRob Clark 493c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 494c8afe684SRob Clark { 495c8afe684SRob Clark struct msm_gem_object *msm_obj; 496c8afe684SRob Clark int count = 0; 497c8afe684SRob Clark size_t size = 0; 498c8afe684SRob Clark 499c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 500c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 501c8afe684SRob Clark seq_printf(m, " "); 502c8afe684SRob Clark msm_gem_describe(obj, m); 503c8afe684SRob Clark count++; 504c8afe684SRob Clark size += obj->size; 505c8afe684SRob Clark } 506c8afe684SRob Clark 507c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 508c8afe684SRob Clark } 509c8afe684SRob Clark #endif 510c8afe684SRob Clark 511c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 512c8afe684SRob Clark { 513c8afe684SRob Clark struct drm_device *dev = obj->dev; 514871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 515c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 516c8afe684SRob Clark int id; 517c8afe684SRob Clark 518c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 519c8afe684SRob Clark 5207198e6b0SRob Clark /* object should not be on active list: */ 5217198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 5227198e6b0SRob Clark 523c8afe684SRob Clark list_del(&msm_obj->mm_list); 524c8afe684SRob Clark 525c8afe684SRob Clark for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { 526871d812aSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 527871d812aSRob Clark if (mmu && msm_obj->domain[id].iova) { 528c8afe684SRob Clark uint32_t offset = (uint32_t)mmap_offset(obj); 529871d812aSRob Clark mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); 530c8afe684SRob Clark } 531c8afe684SRob Clark } 532c8afe684SRob Clark 533c8afe684SRob Clark drm_gem_free_mmap_offset(obj); 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 54505b84911SRob Clark } else { 546c8afe684SRob Clark if (msm_obj->vaddr) 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, 58705b84911SRob Clark struct drm_gem_object **obj) 588c8afe684SRob Clark { 589c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 590c8afe684SRob Clark struct msm_gem_object *msm_obj; 591871d812aSRob Clark unsigned sz; 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 sz = sizeof(*msm_obj); 605871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 606871d812aSRob Clark sz += sizeof(struct drm_mm_node); 607871d812aSRob Clark 608871d812aSRob Clark msm_obj = kzalloc(sz, GFP_KERNEL); 60905b84911SRob Clark if (!msm_obj) 61005b84911SRob Clark return -ENOMEM; 611c8afe684SRob Clark 612871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 613871d812aSRob Clark msm_obj->vram_node = (void *)&msm_obj[1]; 614871d812aSRob Clark 615c8afe684SRob Clark msm_obj->flags = flags; 616c8afe684SRob Clark 6177198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 6187198e6b0SRob Clark reservation_object_init(msm_obj->resv); 619c8afe684SRob Clark 6207198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 621c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 622c8afe684SRob Clark 62305b84911SRob Clark *obj = &msm_obj->base; 62405b84911SRob Clark 62505b84911SRob Clark return 0; 62605b84911SRob Clark } 62705b84911SRob Clark 62805b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 62905b84911SRob Clark uint32_t size, uint32_t flags) 63005b84911SRob Clark { 631871d812aSRob Clark struct drm_gem_object *obj = NULL; 63205b84911SRob Clark int ret; 63305b84911SRob Clark 63405b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 63505b84911SRob Clark 63605b84911SRob Clark size = PAGE_ALIGN(size); 63705b84911SRob Clark 63805b84911SRob Clark ret = msm_gem_new_impl(dev, size, flags, &obj); 63905b84911SRob Clark if (ret) 64005b84911SRob Clark goto fail; 64105b84911SRob Clark 642871d812aSRob Clark if (iommu_present(&platform_bus_type)) { 64305b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 64405b84911SRob Clark if (ret) 64505b84911SRob Clark goto fail; 646871d812aSRob Clark } else { 647871d812aSRob Clark drm_gem_private_object_init(dev, obj, size); 648871d812aSRob Clark } 64905b84911SRob Clark 65005b84911SRob Clark return obj; 65105b84911SRob Clark 65205b84911SRob Clark fail: 65305b84911SRob Clark if (obj) 6549999f105SRob Clark drm_gem_object_unreference(obj); 65505b84911SRob Clark 65605b84911SRob Clark return ERR_PTR(ret); 65705b84911SRob Clark } 65805b84911SRob Clark 65905b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 66005b84911SRob Clark uint32_t size, struct sg_table *sgt) 66105b84911SRob Clark { 66205b84911SRob Clark struct msm_gem_object *msm_obj; 66305b84911SRob Clark struct drm_gem_object *obj; 66405b84911SRob Clark int ret, npages; 66505b84911SRob Clark 666871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 667871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 668871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 669871d812aSRob Clark return ERR_PTR(-EINVAL); 670871d812aSRob Clark } 671871d812aSRob Clark 67205b84911SRob Clark size = PAGE_ALIGN(size); 67305b84911SRob Clark 67405b84911SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); 67505b84911SRob Clark if (ret) 67605b84911SRob Clark goto fail; 67705b84911SRob Clark 67805b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 67905b84911SRob Clark 68005b84911SRob Clark npages = size / PAGE_SIZE; 68105b84911SRob Clark 68205b84911SRob Clark msm_obj = to_msm_bo(obj); 68305b84911SRob Clark msm_obj->sgt = sgt; 68405b84911SRob Clark msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); 68505b84911SRob Clark if (!msm_obj->pages) { 68605b84911SRob Clark ret = -ENOMEM; 68705b84911SRob Clark goto fail; 68805b84911SRob Clark } 68905b84911SRob Clark 69005b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 69105b84911SRob Clark if (ret) 69205b84911SRob Clark goto fail; 69305b84911SRob Clark 694c8afe684SRob Clark return obj; 695c8afe684SRob Clark 696c8afe684SRob Clark fail: 697c8afe684SRob Clark if (obj) 698c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 699c8afe684SRob Clark 700c8afe684SRob Clark return ERR_PTR(ret); 701c8afe684SRob Clark } 702