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)) 76871d812aSRob Clark p = drm_gem_get_pages(obj, 0); 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); 121871d812aSRob Clark else 122871d812aSRob Clark drm_mm_remove_node(msm_obj->vram_node); 123871d812aSRob Clark 124c8afe684SRob Clark msm_obj->pages = NULL; 125c8afe684SRob Clark } 126c8afe684SRob Clark } 127c8afe684SRob Clark 12805b84911SRob Clark struct page **msm_gem_get_pages(struct drm_gem_object *obj) 12905b84911SRob Clark { 13005b84911SRob Clark struct drm_device *dev = obj->dev; 13105b84911SRob Clark struct page **p; 13205b84911SRob Clark mutex_lock(&dev->struct_mutex); 13305b84911SRob Clark p = get_pages(obj); 13405b84911SRob Clark mutex_unlock(&dev->struct_mutex); 13505b84911SRob Clark return p; 13605b84911SRob Clark } 13705b84911SRob Clark 13805b84911SRob Clark void msm_gem_put_pages(struct drm_gem_object *obj) 13905b84911SRob Clark { 14005b84911SRob Clark /* when we start tracking the pin count, then do something here */ 14105b84911SRob Clark } 14205b84911SRob Clark 143c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 144c8afe684SRob Clark struct vm_area_struct *vma) 145c8afe684SRob Clark { 146c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 147c8afe684SRob Clark 148c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 149c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 150c8afe684SRob Clark 151c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 152c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 153c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 154c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 155c8afe684SRob Clark } else { 156c8afe684SRob Clark /* 157c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 158c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 159c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 160c8afe684SRob Clark */ 161c8afe684SRob Clark fput(vma->vm_file); 162c8afe684SRob Clark get_file(obj->filp); 163c8afe684SRob Clark vma->vm_pgoff = 0; 164c8afe684SRob Clark vma->vm_file = obj->filp; 165c8afe684SRob Clark 166c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 167c8afe684SRob Clark } 168c8afe684SRob Clark 169c8afe684SRob Clark return 0; 170c8afe684SRob Clark } 171c8afe684SRob Clark 172c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 173c8afe684SRob Clark { 174c8afe684SRob Clark int ret; 175c8afe684SRob Clark 176c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 177c8afe684SRob Clark if (ret) { 178c8afe684SRob Clark DBG("mmap failed: %d", ret); 179c8afe684SRob Clark return ret; 180c8afe684SRob Clark } 181c8afe684SRob Clark 182c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 183c8afe684SRob Clark } 184c8afe684SRob Clark 185c8afe684SRob Clark int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 186c8afe684SRob Clark { 187c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 188c8afe684SRob Clark struct drm_device *dev = obj->dev; 189c8afe684SRob Clark struct page **pages; 190c8afe684SRob Clark unsigned long pfn; 191c8afe684SRob Clark pgoff_t pgoff; 192c8afe684SRob Clark int ret; 193c8afe684SRob Clark 194c8afe684SRob Clark /* Make sure we don't parallel update on a fault, nor move or remove 195c8afe684SRob Clark * something from beneath our feet 196c8afe684SRob Clark */ 197c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 198c8afe684SRob Clark if (ret) 199c8afe684SRob Clark goto out; 200c8afe684SRob Clark 201c8afe684SRob Clark /* make sure we have pages attached now */ 202c8afe684SRob Clark pages = get_pages(obj); 203c8afe684SRob Clark if (IS_ERR(pages)) { 204c8afe684SRob Clark ret = PTR_ERR(pages); 205c8afe684SRob Clark goto out_unlock; 206c8afe684SRob Clark } 207c8afe684SRob Clark 208c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 209c8afe684SRob Clark pgoff = ((unsigned long)vmf->virtual_address - 210c8afe684SRob Clark vma->vm_start) >> PAGE_SHIFT; 211c8afe684SRob Clark 212871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 213c8afe684SRob Clark 214c8afe684SRob Clark VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, 215c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 216c8afe684SRob Clark 217c8afe684SRob Clark ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn); 218c8afe684SRob Clark 219c8afe684SRob Clark out_unlock: 220c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 221c8afe684SRob Clark out: 222c8afe684SRob Clark switch (ret) { 223c8afe684SRob Clark case -EAGAIN: 224c8afe684SRob Clark case 0: 225c8afe684SRob Clark case -ERESTARTSYS: 226c8afe684SRob Clark case -EINTR: 227505886d5SRob Clark case -EBUSY: 228505886d5SRob Clark /* 229505886d5SRob Clark * EBUSY is ok: this just means that another thread 230505886d5SRob Clark * already did the job. 231505886d5SRob Clark */ 232c8afe684SRob Clark return VM_FAULT_NOPAGE; 233c8afe684SRob Clark case -ENOMEM: 234c8afe684SRob Clark return VM_FAULT_OOM; 235c8afe684SRob Clark default: 236c8afe684SRob Clark return VM_FAULT_SIGBUS; 237c8afe684SRob Clark } 238c8afe684SRob Clark } 239c8afe684SRob Clark 240c8afe684SRob Clark /** get mmap offset */ 241c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 242c8afe684SRob Clark { 243c8afe684SRob Clark struct drm_device *dev = obj->dev; 244c8afe684SRob Clark int ret; 245c8afe684SRob Clark 246c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 247c8afe684SRob Clark 248c8afe684SRob Clark /* Make it mmapable */ 249c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 250c8afe684SRob Clark 251c8afe684SRob Clark if (ret) { 252c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 253c8afe684SRob Clark return 0; 254c8afe684SRob Clark } 255c8afe684SRob Clark 256c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 257c8afe684SRob Clark } 258c8afe684SRob Clark 259c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 260c8afe684SRob Clark { 261c8afe684SRob Clark uint64_t offset; 262c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 263c8afe684SRob Clark offset = mmap_offset(obj); 264c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 265c8afe684SRob Clark return offset; 266c8afe684SRob Clark } 267c8afe684SRob Clark 268c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 269c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 270c8afe684SRob Clark * iova ref if you know one is already held. 271c8afe684SRob Clark * 272c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 273c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 274c8afe684SRob Clark */ 275c8afe684SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, 276c8afe684SRob Clark uint32_t *iova) 277c8afe684SRob Clark { 278c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 279c8afe684SRob Clark int ret = 0; 280c8afe684SRob Clark 281c8afe684SRob Clark if (!msm_obj->domain[id].iova) { 282c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 283871d812aSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 284871d812aSRob Clark struct page **pages = get_pages(obj); 285871d812aSRob Clark 286c8afe684SRob Clark if (IS_ERR(pages)) 287c8afe684SRob Clark return PTR_ERR(pages); 288871d812aSRob Clark 289871d812aSRob Clark if (iommu_present(&platform_bus_type)) { 290871d812aSRob Clark uint32_t offset = (uint32_t)mmap_offset(obj); 291871d812aSRob Clark ret = mmu->funcs->map(mmu, offset, msm_obj->sgt, 292c8afe684SRob Clark obj->size, IOMMU_READ | IOMMU_WRITE); 293c8afe684SRob Clark msm_obj->domain[id].iova = offset; 294871d812aSRob Clark } else { 295871d812aSRob Clark msm_obj->domain[id].iova = physaddr(obj); 296871d812aSRob Clark } 297c8afe684SRob Clark } 298c8afe684SRob Clark 299c8afe684SRob Clark if (!ret) 300c8afe684SRob Clark *iova = msm_obj->domain[id].iova; 301c8afe684SRob Clark 302c8afe684SRob Clark return ret; 303c8afe684SRob Clark } 304c8afe684SRob Clark 305c8afe684SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) 306c8afe684SRob Clark { 307edd4fc63SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 308c8afe684SRob Clark int ret; 309edd4fc63SRob Clark 310edd4fc63SRob Clark /* this is safe right now because we don't unmap until the 311edd4fc63SRob Clark * bo is deleted: 312edd4fc63SRob Clark */ 313edd4fc63SRob Clark if (msm_obj->domain[id].iova) { 314edd4fc63SRob Clark *iova = msm_obj->domain[id].iova; 315edd4fc63SRob Clark return 0; 316edd4fc63SRob Clark } 317edd4fc63SRob Clark 318c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 319c8afe684SRob Clark ret = msm_gem_get_iova_locked(obj, id, iova); 320c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 321c8afe684SRob Clark return ret; 322c8afe684SRob Clark } 323c8afe684SRob Clark 324c8afe684SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, int id) 325c8afe684SRob Clark { 326c8afe684SRob Clark // XXX TODO .. 327c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 328c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 329c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 330c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 331c8afe684SRob Clark // things that are no longer needed.. 332c8afe684SRob Clark } 333c8afe684SRob Clark 334c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 335c8afe684SRob Clark struct drm_mode_create_dumb *args) 336c8afe684SRob Clark { 337c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 338c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 339c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 340c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 341c8afe684SRob Clark } 342c8afe684SRob Clark 343c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 344c8afe684SRob Clark uint32_t handle, uint64_t *offset) 345c8afe684SRob Clark { 346c8afe684SRob Clark struct drm_gem_object *obj; 347c8afe684SRob Clark int ret = 0; 348c8afe684SRob Clark 349c8afe684SRob Clark /* GEM does all our handle to object mapping */ 350c8afe684SRob Clark obj = drm_gem_object_lookup(dev, file, handle); 351c8afe684SRob Clark if (obj == NULL) { 352c8afe684SRob Clark ret = -ENOENT; 353c8afe684SRob Clark goto fail; 354c8afe684SRob Clark } 355c8afe684SRob Clark 356c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 357c8afe684SRob Clark 358c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 359c8afe684SRob Clark 360c8afe684SRob Clark fail: 361c8afe684SRob Clark return ret; 362c8afe684SRob Clark } 363c8afe684SRob Clark 364c8afe684SRob Clark void *msm_gem_vaddr_locked(struct drm_gem_object *obj) 365c8afe684SRob Clark { 366c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 367c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 368c8afe684SRob Clark if (!msm_obj->vaddr) { 369c8afe684SRob Clark struct page **pages = get_pages(obj); 370c8afe684SRob Clark if (IS_ERR(pages)) 371c8afe684SRob Clark return ERR_CAST(pages); 372c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 373c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 374c8afe684SRob Clark } 375c8afe684SRob Clark return msm_obj->vaddr; 376c8afe684SRob Clark } 377c8afe684SRob Clark 378c8afe684SRob Clark void *msm_gem_vaddr(struct drm_gem_object *obj) 379c8afe684SRob Clark { 380c8afe684SRob Clark void *ret; 381c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 382c8afe684SRob Clark ret = msm_gem_vaddr_locked(obj); 383c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 384c8afe684SRob Clark return ret; 385c8afe684SRob Clark } 386c8afe684SRob Clark 387edd4fc63SRob Clark /* setup callback for when bo is no longer busy.. 388edd4fc63SRob Clark * TODO probably want to differentiate read vs write.. 389edd4fc63SRob Clark */ 390edd4fc63SRob Clark int msm_gem_queue_inactive_cb(struct drm_gem_object *obj, 391edd4fc63SRob Clark struct msm_fence_cb *cb) 392c8afe684SRob Clark { 393c8afe684SRob Clark struct drm_device *dev = obj->dev; 394c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 3957198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3967198e6b0SRob Clark int ret = 0; 397c8afe684SRob Clark 3987198e6b0SRob Clark mutex_lock(&dev->struct_mutex); 399edd4fc63SRob Clark if (!list_empty(&cb->work.entry)) { 4007198e6b0SRob Clark ret = -EINVAL; 4017198e6b0SRob Clark } else if (is_active(msm_obj)) { 402edd4fc63SRob Clark cb->fence = max(msm_obj->read_fence, msm_obj->write_fence); 403edd4fc63SRob Clark list_add_tail(&cb->work.entry, &priv->fence_cbs); 4047198e6b0SRob Clark } else { 405edd4fc63SRob Clark queue_work(priv->wq, &cb->work); 4067198e6b0SRob Clark } 4077198e6b0SRob Clark mutex_unlock(&dev->struct_mutex); 408c8afe684SRob Clark 4097198e6b0SRob Clark return ret; 4107198e6b0SRob Clark } 4117198e6b0SRob Clark 4127198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 413bf6811f3SRob Clark struct msm_gpu *gpu, bool write, uint32_t fence) 4147198e6b0SRob Clark { 4157198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4167198e6b0SRob Clark msm_obj->gpu = gpu; 417bf6811f3SRob Clark if (write) 418bf6811f3SRob Clark msm_obj->write_fence = fence; 419bf6811f3SRob Clark else 420bf6811f3SRob Clark msm_obj->read_fence = fence; 4217198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4227198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 4237198e6b0SRob Clark } 4247198e6b0SRob Clark 4257198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 4267198e6b0SRob Clark { 4277198e6b0SRob Clark struct drm_device *dev = obj->dev; 4287198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 4297198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4307198e6b0SRob Clark 4317198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 4327198e6b0SRob Clark 4337198e6b0SRob Clark msm_obj->gpu = NULL; 434bf6811f3SRob Clark msm_obj->read_fence = 0; 435bf6811f3SRob Clark msm_obj->write_fence = 0; 4367198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4377198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 4387198e6b0SRob Clark } 4397198e6b0SRob Clark 4407198e6b0SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, 4417198e6b0SRob Clark struct timespec *timeout) 4427198e6b0SRob Clark { 4437198e6b0SRob Clark struct drm_device *dev = obj->dev; 4447198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4457198e6b0SRob Clark int ret = 0; 4467198e6b0SRob Clark 447f816f272SRob Clark if (is_active(msm_obj)) { 448bf6811f3SRob Clark uint32_t fence = 0; 449f816f272SRob Clark 450bf6811f3SRob Clark if (op & MSM_PREP_READ) 451bf6811f3SRob Clark fence = msm_obj->write_fence; 452bf6811f3SRob Clark if (op & MSM_PREP_WRITE) 453bf6811f3SRob Clark fence = max(fence, msm_obj->read_fence); 454f816f272SRob Clark if (op & MSM_PREP_NOSYNC) 455f816f272SRob Clark timeout = NULL; 456f816f272SRob Clark 457bf6811f3SRob Clark ret = msm_wait_fence_interruptable(dev, fence, timeout); 458bf6811f3SRob Clark } 4597198e6b0SRob Clark 4607198e6b0SRob Clark /* TODO cache maintenance */ 4617198e6b0SRob Clark 4627198e6b0SRob Clark return ret; 4637198e6b0SRob Clark } 4647198e6b0SRob Clark 4657198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 4667198e6b0SRob Clark { 4677198e6b0SRob Clark /* TODO cache maintenance */ 468c8afe684SRob Clark return 0; 469c8afe684SRob Clark } 470c8afe684SRob Clark 471c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 472c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 473c8afe684SRob Clark { 474c8afe684SRob Clark struct drm_device *dev = obj->dev; 475c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 476c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 477c8afe684SRob Clark 478c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 479bf6811f3SRob Clark seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %d\n", 4807198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 481bf6811f3SRob Clark msm_obj->read_fence, msm_obj->write_fence, 482bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 483c8afe684SRob Clark off, msm_obj->vaddr, obj->size); 484c8afe684SRob Clark } 485c8afe684SRob Clark 486c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 487c8afe684SRob Clark { 488c8afe684SRob Clark struct msm_gem_object *msm_obj; 489c8afe684SRob Clark int count = 0; 490c8afe684SRob Clark size_t size = 0; 491c8afe684SRob Clark 492c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 493c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 494c8afe684SRob Clark seq_printf(m, " "); 495c8afe684SRob Clark msm_gem_describe(obj, m); 496c8afe684SRob Clark count++; 497c8afe684SRob Clark size += obj->size; 498c8afe684SRob Clark } 499c8afe684SRob Clark 500c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 501c8afe684SRob Clark } 502c8afe684SRob Clark #endif 503c8afe684SRob Clark 504c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 505c8afe684SRob Clark { 506c8afe684SRob Clark struct drm_device *dev = obj->dev; 507871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 508c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 509c8afe684SRob Clark int id; 510c8afe684SRob Clark 511c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 512c8afe684SRob Clark 5137198e6b0SRob Clark /* object should not be on active list: */ 5147198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 5157198e6b0SRob Clark 516c8afe684SRob Clark list_del(&msm_obj->mm_list); 517c8afe684SRob Clark 518c8afe684SRob Clark for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { 519871d812aSRob Clark struct msm_mmu *mmu = priv->mmus[id]; 520871d812aSRob Clark if (mmu && msm_obj->domain[id].iova) { 521c8afe684SRob Clark uint32_t offset = (uint32_t)mmap_offset(obj); 522871d812aSRob Clark mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); 523c8afe684SRob Clark } 524c8afe684SRob Clark } 525c8afe684SRob Clark 526c8afe684SRob Clark drm_gem_free_mmap_offset(obj); 527c8afe684SRob Clark 52805b84911SRob Clark if (obj->import_attach) { 52905b84911SRob Clark if (msm_obj->vaddr) 53005b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 53105b84911SRob Clark 53205b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 53305b84911SRob Clark * ours, just free the array we allocated: 53405b84911SRob Clark */ 53505b84911SRob Clark if (msm_obj->pages) 53605b84911SRob Clark drm_free_large(msm_obj->pages); 53705b84911SRob Clark 53805b84911SRob Clark } else { 539c8afe684SRob Clark if (msm_obj->vaddr) 540c8afe684SRob Clark vunmap(msm_obj->vaddr); 541c8afe684SRob Clark put_pages(obj); 54205b84911SRob Clark } 543c8afe684SRob Clark 5447198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 5457198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 5467198e6b0SRob Clark 547c8afe684SRob Clark drm_gem_object_release(obj); 548c8afe684SRob Clark 549c8afe684SRob Clark kfree(msm_obj); 550c8afe684SRob Clark } 551c8afe684SRob Clark 552c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 553c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 554c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 555c8afe684SRob Clark { 556c8afe684SRob Clark struct drm_gem_object *obj; 557c8afe684SRob Clark int ret; 558c8afe684SRob Clark 559c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 560c8afe684SRob Clark if (ret) 561c8afe684SRob Clark return ret; 562c8afe684SRob Clark 563c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 564c8afe684SRob Clark 565c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 566c8afe684SRob Clark 567c8afe684SRob Clark if (IS_ERR(obj)) 568c8afe684SRob Clark return PTR_ERR(obj); 569c8afe684SRob Clark 570c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 571c8afe684SRob Clark 572c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 573c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 574c8afe684SRob Clark 575c8afe684SRob Clark return ret; 576c8afe684SRob Clark } 577c8afe684SRob Clark 57805b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 57905b84911SRob Clark uint32_t size, uint32_t flags, 58005b84911SRob Clark struct drm_gem_object **obj) 581c8afe684SRob Clark { 582c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 583c8afe684SRob Clark struct msm_gem_object *msm_obj; 584871d812aSRob Clark unsigned sz; 585c8afe684SRob Clark 586c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 587c8afe684SRob Clark case MSM_BO_UNCACHED: 588c8afe684SRob Clark case MSM_BO_CACHED: 589c8afe684SRob Clark case MSM_BO_WC: 590c8afe684SRob Clark break; 591c8afe684SRob Clark default: 592c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 593c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 59405b84911SRob Clark return -EINVAL; 595c8afe684SRob Clark } 596c8afe684SRob Clark 597871d812aSRob Clark sz = sizeof(*msm_obj); 598871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 599871d812aSRob Clark sz += sizeof(struct drm_mm_node); 600871d812aSRob Clark 601871d812aSRob Clark msm_obj = kzalloc(sz, GFP_KERNEL); 60205b84911SRob Clark if (!msm_obj) 60305b84911SRob Clark return -ENOMEM; 604c8afe684SRob Clark 605871d812aSRob Clark if (!iommu_present(&platform_bus_type)) 606871d812aSRob Clark msm_obj->vram_node = (void *)&msm_obj[1]; 607871d812aSRob Clark 608c8afe684SRob Clark msm_obj->flags = flags; 609c8afe684SRob Clark 6107198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 6117198e6b0SRob Clark reservation_object_init(msm_obj->resv); 612c8afe684SRob Clark 6137198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 614c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 615c8afe684SRob Clark 61605b84911SRob Clark *obj = &msm_obj->base; 61705b84911SRob Clark 61805b84911SRob Clark return 0; 61905b84911SRob Clark } 62005b84911SRob Clark 62105b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 62205b84911SRob Clark uint32_t size, uint32_t flags) 62305b84911SRob Clark { 624871d812aSRob Clark struct drm_gem_object *obj = NULL; 62505b84911SRob Clark int ret; 62605b84911SRob Clark 62705b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 62805b84911SRob Clark 62905b84911SRob Clark size = PAGE_ALIGN(size); 63005b84911SRob Clark 63105b84911SRob Clark ret = msm_gem_new_impl(dev, size, flags, &obj); 63205b84911SRob Clark if (ret) 63305b84911SRob Clark goto fail; 63405b84911SRob Clark 635871d812aSRob Clark if (iommu_present(&platform_bus_type)) { 63605b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 63705b84911SRob Clark if (ret) 63805b84911SRob Clark goto fail; 639871d812aSRob Clark } else { 640871d812aSRob Clark drm_gem_private_object_init(dev, obj, size); 641871d812aSRob Clark } 64205b84911SRob Clark 64305b84911SRob Clark return obj; 64405b84911SRob Clark 64505b84911SRob Clark fail: 64605b84911SRob Clark if (obj) 64705b84911SRob Clark drm_gem_object_unreference_unlocked(obj); 64805b84911SRob Clark 64905b84911SRob Clark return ERR_PTR(ret); 65005b84911SRob Clark } 65105b84911SRob Clark 65205b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 65305b84911SRob Clark uint32_t size, struct sg_table *sgt) 65405b84911SRob Clark { 65505b84911SRob Clark struct msm_gem_object *msm_obj; 65605b84911SRob Clark struct drm_gem_object *obj; 65705b84911SRob Clark int ret, npages; 65805b84911SRob Clark 659871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 660871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 661871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 662871d812aSRob Clark return ERR_PTR(-EINVAL); 663871d812aSRob Clark } 664871d812aSRob Clark 66505b84911SRob Clark size = PAGE_ALIGN(size); 66605b84911SRob Clark 66705b84911SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); 66805b84911SRob Clark if (ret) 66905b84911SRob Clark goto fail; 67005b84911SRob Clark 67105b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 67205b84911SRob Clark 67305b84911SRob Clark npages = size / PAGE_SIZE; 67405b84911SRob Clark 67505b84911SRob Clark msm_obj = to_msm_bo(obj); 67605b84911SRob Clark msm_obj->sgt = sgt; 67705b84911SRob Clark msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); 67805b84911SRob Clark if (!msm_obj->pages) { 67905b84911SRob Clark ret = -ENOMEM; 68005b84911SRob Clark goto fail; 68105b84911SRob Clark } 68205b84911SRob Clark 68305b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 68405b84911SRob Clark if (ret) 68505b84911SRob Clark goto fail; 68605b84911SRob Clark 687c8afe684SRob Clark return obj; 688c8afe684SRob Clark 689c8afe684SRob Clark fail: 690c8afe684SRob Clark if (obj) 691c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 692c8afe684SRob Clark 693c8afe684SRob Clark return ERR_PTR(ret); 694c8afe684SRob Clark } 695