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" 25c8afe684SRob Clark 26c8afe684SRob Clark 27c8afe684SRob Clark /* called with dev->struct_mutex held */ 28c8afe684SRob Clark static struct page **get_pages(struct drm_gem_object *obj) 29c8afe684SRob Clark { 30c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 31c8afe684SRob Clark 32c8afe684SRob Clark if (!msm_obj->pages) { 33c8afe684SRob Clark struct drm_device *dev = obj->dev; 34c8afe684SRob Clark struct page **p = drm_gem_get_pages(obj, 0); 35c8afe684SRob Clark int npages = obj->size >> PAGE_SHIFT; 36c8afe684SRob Clark 37c8afe684SRob Clark if (IS_ERR(p)) { 38c8afe684SRob Clark dev_err(dev->dev, "could not get pages: %ld\n", 39c8afe684SRob Clark PTR_ERR(p)); 40c8afe684SRob Clark return p; 41c8afe684SRob Clark } 42c8afe684SRob Clark 43c8afe684SRob Clark msm_obj->sgt = drm_prime_pages_to_sg(p, npages); 441f70e079SWei Yongjun if (IS_ERR(msm_obj->sgt)) { 45c8afe684SRob Clark dev_err(dev->dev, "failed to allocate sgt\n"); 461f70e079SWei Yongjun return ERR_CAST(msm_obj->sgt); 47c8afe684SRob Clark } 48c8afe684SRob Clark 49c8afe684SRob Clark msm_obj->pages = p; 50c8afe684SRob Clark 51c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 52c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 53c8afe684SRob Clark */ 54c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 55c8afe684SRob Clark dma_map_sg(dev->dev, msm_obj->sgt->sgl, 56c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 57c8afe684SRob Clark } 58c8afe684SRob Clark 59c8afe684SRob Clark return msm_obj->pages; 60c8afe684SRob Clark } 61c8afe684SRob Clark 62c8afe684SRob Clark static void put_pages(struct drm_gem_object *obj) 63c8afe684SRob Clark { 64c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 65c8afe684SRob Clark 66c8afe684SRob Clark if (msm_obj->pages) { 67c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 68c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 69c8afe684SRob Clark */ 70c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 71c8afe684SRob Clark dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, 72c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 73c8afe684SRob Clark sg_free_table(msm_obj->sgt); 74c8afe684SRob Clark kfree(msm_obj->sgt); 75c8afe684SRob Clark 76c8afe684SRob Clark drm_gem_put_pages(obj, msm_obj->pages, true, false); 77c8afe684SRob Clark msm_obj->pages = NULL; 78c8afe684SRob Clark } 79c8afe684SRob Clark } 80c8afe684SRob Clark 8105b84911SRob Clark struct page **msm_gem_get_pages(struct drm_gem_object *obj) 8205b84911SRob Clark { 8305b84911SRob Clark struct drm_device *dev = obj->dev; 8405b84911SRob Clark struct page **p; 8505b84911SRob Clark mutex_lock(&dev->struct_mutex); 8605b84911SRob Clark p = get_pages(obj); 8705b84911SRob Clark mutex_unlock(&dev->struct_mutex); 8805b84911SRob Clark return p; 8905b84911SRob Clark } 9005b84911SRob Clark 9105b84911SRob Clark void msm_gem_put_pages(struct drm_gem_object *obj) 9205b84911SRob Clark { 9305b84911SRob Clark /* when we start tracking the pin count, then do something here */ 9405b84911SRob Clark } 9505b84911SRob Clark 96c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 97c8afe684SRob Clark struct vm_area_struct *vma) 98c8afe684SRob Clark { 99c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 100c8afe684SRob Clark 101c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 102c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 103c8afe684SRob Clark 104c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 105c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 106c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 107c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 108c8afe684SRob Clark } else { 109c8afe684SRob Clark /* 110c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 111c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 112c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 113c8afe684SRob Clark */ 114c8afe684SRob Clark fput(vma->vm_file); 115c8afe684SRob Clark get_file(obj->filp); 116c8afe684SRob Clark vma->vm_pgoff = 0; 117c8afe684SRob Clark vma->vm_file = obj->filp; 118c8afe684SRob Clark 119c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 120c8afe684SRob Clark } 121c8afe684SRob Clark 122c8afe684SRob Clark return 0; 123c8afe684SRob Clark } 124c8afe684SRob Clark 125c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 126c8afe684SRob Clark { 127c8afe684SRob Clark int ret; 128c8afe684SRob Clark 129c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 130c8afe684SRob Clark if (ret) { 131c8afe684SRob Clark DBG("mmap failed: %d", ret); 132c8afe684SRob Clark return ret; 133c8afe684SRob Clark } 134c8afe684SRob Clark 135c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 136c8afe684SRob Clark } 137c8afe684SRob Clark 138c8afe684SRob Clark int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 139c8afe684SRob Clark { 140c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 141c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 142c8afe684SRob Clark struct drm_device *dev = obj->dev; 143c8afe684SRob Clark struct page **pages; 144c8afe684SRob Clark unsigned long pfn; 145c8afe684SRob Clark pgoff_t pgoff; 146c8afe684SRob Clark int ret; 147c8afe684SRob Clark 148c8afe684SRob Clark /* Make sure we don't parallel update on a fault, nor move or remove 149c8afe684SRob Clark * something from beneath our feet 150c8afe684SRob Clark */ 151c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 152c8afe684SRob Clark if (ret) 153c8afe684SRob Clark goto out; 154c8afe684SRob Clark 155c8afe684SRob Clark /* make sure we have pages attached now */ 156c8afe684SRob Clark pages = get_pages(obj); 157c8afe684SRob Clark if (IS_ERR(pages)) { 158c8afe684SRob Clark ret = PTR_ERR(pages); 159c8afe684SRob Clark goto out_unlock; 160c8afe684SRob Clark } 161c8afe684SRob Clark 162c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 163c8afe684SRob Clark pgoff = ((unsigned long)vmf->virtual_address - 164c8afe684SRob Clark vma->vm_start) >> PAGE_SHIFT; 165c8afe684SRob Clark 166c8afe684SRob Clark pfn = page_to_pfn(msm_obj->pages[pgoff]); 167c8afe684SRob Clark 168c8afe684SRob Clark VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, 169c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 170c8afe684SRob Clark 171c8afe684SRob Clark ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn); 172c8afe684SRob Clark 173c8afe684SRob Clark out_unlock: 174c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 175c8afe684SRob Clark out: 176c8afe684SRob Clark switch (ret) { 177c8afe684SRob Clark case -EAGAIN: 178c8afe684SRob Clark case 0: 179c8afe684SRob Clark case -ERESTARTSYS: 180c8afe684SRob Clark case -EINTR: 181c8afe684SRob Clark return VM_FAULT_NOPAGE; 182c8afe684SRob Clark case -ENOMEM: 183c8afe684SRob Clark return VM_FAULT_OOM; 184c8afe684SRob Clark default: 185c8afe684SRob Clark return VM_FAULT_SIGBUS; 186c8afe684SRob Clark } 187c8afe684SRob Clark } 188c8afe684SRob Clark 189c8afe684SRob Clark /** get mmap offset */ 190c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 191c8afe684SRob Clark { 192c8afe684SRob Clark struct drm_device *dev = obj->dev; 193c8afe684SRob Clark int ret; 194c8afe684SRob Clark 195c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 196c8afe684SRob Clark 197c8afe684SRob Clark /* Make it mmapable */ 198c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 199c8afe684SRob Clark 200c8afe684SRob Clark if (ret) { 201c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 202c8afe684SRob Clark return 0; 203c8afe684SRob Clark } 204c8afe684SRob Clark 205c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 206c8afe684SRob Clark } 207c8afe684SRob Clark 208c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 209c8afe684SRob Clark { 210c8afe684SRob Clark uint64_t offset; 211c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 212c8afe684SRob Clark offset = mmap_offset(obj); 213c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 214c8afe684SRob Clark return offset; 215c8afe684SRob Clark } 216c8afe684SRob Clark 217c8afe684SRob Clark /* helpers for dealing w/ iommu: */ 218c8afe684SRob Clark static int map_range(struct iommu_domain *domain, unsigned int iova, 219c8afe684SRob Clark struct sg_table *sgt, unsigned int len, int prot) 220c8afe684SRob Clark { 221c8afe684SRob Clark struct scatterlist *sg; 222c8afe684SRob Clark unsigned int da = iova; 223c8afe684SRob Clark unsigned int i, j; 224c8afe684SRob Clark int ret; 225c8afe684SRob Clark 226c8afe684SRob Clark if (!domain || !sgt) 227c8afe684SRob Clark return -EINVAL; 228c8afe684SRob Clark 229c8afe684SRob Clark for_each_sg(sgt->sgl, sg, sgt->nents, i) { 230c8afe684SRob Clark u32 pa = sg_phys(sg) - sg->offset; 231c8afe684SRob Clark size_t bytes = sg->length + sg->offset; 232c8afe684SRob Clark 233c8afe684SRob Clark VERB("map[%d]: %08x %08x(%x)", i, iova, pa, bytes); 234c8afe684SRob Clark 235c8afe684SRob Clark ret = iommu_map(domain, da, pa, bytes, prot); 236c8afe684SRob Clark if (ret) 237c8afe684SRob Clark goto fail; 238c8afe684SRob Clark 239c8afe684SRob Clark da += bytes; 240c8afe684SRob Clark } 241c8afe684SRob Clark 242c8afe684SRob Clark return 0; 243c8afe684SRob Clark 244c8afe684SRob Clark fail: 245c8afe684SRob Clark da = iova; 246c8afe684SRob Clark 247c8afe684SRob Clark for_each_sg(sgt->sgl, sg, i, j) { 248c8afe684SRob Clark size_t bytes = sg->length + sg->offset; 249c8afe684SRob Clark iommu_unmap(domain, da, bytes); 250c8afe684SRob Clark da += bytes; 251c8afe684SRob Clark } 252c8afe684SRob Clark return ret; 253c8afe684SRob Clark } 254c8afe684SRob Clark 255c8afe684SRob Clark static void unmap_range(struct iommu_domain *domain, unsigned int iova, 256c8afe684SRob Clark struct sg_table *sgt, unsigned int len) 257c8afe684SRob Clark { 258c8afe684SRob Clark struct scatterlist *sg; 259c8afe684SRob Clark unsigned int da = iova; 260c8afe684SRob Clark int i; 261c8afe684SRob Clark 262c8afe684SRob Clark for_each_sg(sgt->sgl, sg, sgt->nents, i) { 263c8afe684SRob Clark size_t bytes = sg->length + sg->offset; 264c8afe684SRob Clark size_t unmapped; 265c8afe684SRob Clark 266c8afe684SRob Clark unmapped = iommu_unmap(domain, da, bytes); 267c8afe684SRob Clark if (unmapped < bytes) 268c8afe684SRob Clark break; 269c8afe684SRob Clark 270c8afe684SRob Clark VERB("unmap[%d]: %08x(%x)", i, iova, bytes); 271c8afe684SRob Clark 272c8afe684SRob Clark BUG_ON(!IS_ALIGNED(bytes, PAGE_SIZE)); 273c8afe684SRob Clark 274c8afe684SRob Clark da += bytes; 275c8afe684SRob Clark } 276c8afe684SRob Clark } 277c8afe684SRob Clark 278c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 279c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 280c8afe684SRob Clark * iova ref if you know one is already held. 281c8afe684SRob Clark * 282c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 283c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 284c8afe684SRob Clark */ 285c8afe684SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, 286c8afe684SRob Clark uint32_t *iova) 287c8afe684SRob Clark { 288c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 289c8afe684SRob Clark int ret = 0; 290c8afe684SRob Clark 291c8afe684SRob Clark if (!msm_obj->domain[id].iova) { 292c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 293c8afe684SRob Clark uint32_t offset = (uint32_t)mmap_offset(obj); 294c8afe684SRob Clark struct page **pages; 295c8afe684SRob Clark pages = get_pages(obj); 296c8afe684SRob Clark if (IS_ERR(pages)) 297c8afe684SRob Clark return PTR_ERR(pages); 298c8afe684SRob Clark // XXX ideally we would not map buffers writable when not needed... 299c8afe684SRob Clark ret = map_range(priv->iommus[id], offset, msm_obj->sgt, 300c8afe684SRob Clark obj->size, IOMMU_READ | IOMMU_WRITE); 301c8afe684SRob Clark msm_obj->domain[id].iova = offset; 302c8afe684SRob Clark } 303c8afe684SRob Clark 304c8afe684SRob Clark if (!ret) 305c8afe684SRob Clark *iova = msm_obj->domain[id].iova; 306c8afe684SRob Clark 307c8afe684SRob Clark return ret; 308c8afe684SRob Clark } 309c8afe684SRob Clark 310c8afe684SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) 311c8afe684SRob Clark { 312c8afe684SRob Clark int ret; 313c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 314c8afe684SRob Clark ret = msm_gem_get_iova_locked(obj, id, iova); 315c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 316c8afe684SRob Clark return ret; 317c8afe684SRob Clark } 318c8afe684SRob Clark 319c8afe684SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, int id) 320c8afe684SRob Clark { 321c8afe684SRob Clark // XXX TODO .. 322c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 323c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 324c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 325c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 326c8afe684SRob Clark // things that are no longer needed.. 327c8afe684SRob Clark } 328c8afe684SRob Clark 329c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 330c8afe684SRob Clark struct drm_mode_create_dumb *args) 331c8afe684SRob Clark { 332c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 333c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 334c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 335c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 336c8afe684SRob Clark } 337c8afe684SRob Clark 338c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 339c8afe684SRob Clark uint32_t handle, uint64_t *offset) 340c8afe684SRob Clark { 341c8afe684SRob Clark struct drm_gem_object *obj; 342c8afe684SRob Clark int ret = 0; 343c8afe684SRob Clark 344c8afe684SRob Clark /* GEM does all our handle to object mapping */ 345c8afe684SRob Clark obj = drm_gem_object_lookup(dev, file, handle); 346c8afe684SRob Clark if (obj == NULL) { 347c8afe684SRob Clark ret = -ENOENT; 348c8afe684SRob Clark goto fail; 349c8afe684SRob Clark } 350c8afe684SRob Clark 351c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 352c8afe684SRob Clark 353c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 354c8afe684SRob Clark 355c8afe684SRob Clark fail: 356c8afe684SRob Clark return ret; 357c8afe684SRob Clark } 358c8afe684SRob Clark 359c8afe684SRob Clark void *msm_gem_vaddr_locked(struct drm_gem_object *obj) 360c8afe684SRob Clark { 361c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 362c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 363c8afe684SRob Clark if (!msm_obj->vaddr) { 364c8afe684SRob Clark struct page **pages = get_pages(obj); 365c8afe684SRob Clark if (IS_ERR(pages)) 366c8afe684SRob Clark return ERR_CAST(pages); 367c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 368c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 369c8afe684SRob Clark } 370c8afe684SRob Clark return msm_obj->vaddr; 371c8afe684SRob Clark } 372c8afe684SRob Clark 373c8afe684SRob Clark void *msm_gem_vaddr(struct drm_gem_object *obj) 374c8afe684SRob Clark { 375c8afe684SRob Clark void *ret; 376c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 377c8afe684SRob Clark ret = msm_gem_vaddr_locked(obj); 378c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 379c8afe684SRob Clark return ret; 380c8afe684SRob Clark } 381c8afe684SRob Clark 382c8afe684SRob Clark int msm_gem_queue_inactive_work(struct drm_gem_object *obj, 383c8afe684SRob Clark struct work_struct *work) 384c8afe684SRob Clark { 385c8afe684SRob Clark struct drm_device *dev = obj->dev; 386c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 3877198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3887198e6b0SRob Clark int ret = 0; 389c8afe684SRob Clark 3907198e6b0SRob Clark mutex_lock(&dev->struct_mutex); 3917198e6b0SRob Clark if (!list_empty(&work->entry)) { 3927198e6b0SRob Clark ret = -EINVAL; 3937198e6b0SRob Clark } else if (is_active(msm_obj)) { 3947198e6b0SRob Clark list_add_tail(&work->entry, &msm_obj->inactive_work); 3957198e6b0SRob Clark } else { 396c8afe684SRob Clark queue_work(priv->wq, work); 3977198e6b0SRob Clark } 3987198e6b0SRob Clark mutex_unlock(&dev->struct_mutex); 399c8afe684SRob Clark 4007198e6b0SRob Clark return ret; 4017198e6b0SRob Clark } 4027198e6b0SRob Clark 4037198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 404bf6811f3SRob Clark struct msm_gpu *gpu, bool write, uint32_t fence) 4057198e6b0SRob Clark { 4067198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4077198e6b0SRob Clark msm_obj->gpu = gpu; 408bf6811f3SRob Clark if (write) 409bf6811f3SRob Clark msm_obj->write_fence = fence; 410bf6811f3SRob Clark else 411bf6811f3SRob Clark msm_obj->read_fence = fence; 4127198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4137198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 4147198e6b0SRob Clark } 4157198e6b0SRob Clark 4167198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 4177198e6b0SRob Clark { 4187198e6b0SRob Clark struct drm_device *dev = obj->dev; 4197198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 4207198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4217198e6b0SRob Clark 4227198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 4237198e6b0SRob Clark 4247198e6b0SRob Clark msm_obj->gpu = NULL; 425bf6811f3SRob Clark msm_obj->read_fence = 0; 426bf6811f3SRob Clark msm_obj->write_fence = 0; 4277198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4287198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 4297198e6b0SRob Clark 4307198e6b0SRob Clark while (!list_empty(&msm_obj->inactive_work)) { 4317198e6b0SRob Clark struct work_struct *work; 4327198e6b0SRob Clark 4337198e6b0SRob Clark work = list_first_entry(&msm_obj->inactive_work, 4347198e6b0SRob Clark struct work_struct, entry); 4357198e6b0SRob Clark 4367198e6b0SRob Clark list_del_init(&work->entry); 4377198e6b0SRob Clark queue_work(priv->wq, work); 4387198e6b0SRob Clark } 4397198e6b0SRob Clark } 4407198e6b0SRob Clark 4417198e6b0SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, 4427198e6b0SRob Clark struct timespec *timeout) 4437198e6b0SRob Clark { 4447198e6b0SRob Clark struct drm_device *dev = obj->dev; 4457198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4467198e6b0SRob Clark int ret = 0; 4477198e6b0SRob Clark 448f816f272SRob Clark if (is_active(msm_obj)) { 449bf6811f3SRob Clark uint32_t fence = 0; 450f816f272SRob Clark 451bf6811f3SRob Clark if (op & MSM_PREP_READ) 452bf6811f3SRob Clark fence = msm_obj->write_fence; 453bf6811f3SRob Clark if (op & MSM_PREP_WRITE) 454bf6811f3SRob Clark fence = max(fence, msm_obj->read_fence); 455f816f272SRob Clark if (op & MSM_PREP_NOSYNC) 456f816f272SRob Clark timeout = NULL; 457f816f272SRob Clark 458bf6811f3SRob Clark ret = msm_wait_fence_interruptable(dev, fence, timeout); 459bf6811f3SRob Clark } 4607198e6b0SRob Clark 4617198e6b0SRob Clark /* TODO cache maintenance */ 4627198e6b0SRob Clark 4637198e6b0SRob Clark return ret; 4647198e6b0SRob Clark } 4657198e6b0SRob Clark 4667198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 4677198e6b0SRob Clark { 4687198e6b0SRob Clark /* TODO cache maintenance */ 469c8afe684SRob Clark return 0; 470c8afe684SRob Clark } 471c8afe684SRob Clark 472c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 473c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 474c8afe684SRob Clark { 475c8afe684SRob Clark struct drm_device *dev = obj->dev; 476c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 477c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 478c8afe684SRob Clark 479c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 480bf6811f3SRob Clark seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %d\n", 4817198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 482bf6811f3SRob Clark msm_obj->read_fence, msm_obj->write_fence, 483bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 484c8afe684SRob Clark off, msm_obj->vaddr, obj->size); 485c8afe684SRob Clark } 486c8afe684SRob Clark 487c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 488c8afe684SRob Clark { 489c8afe684SRob Clark struct msm_gem_object *msm_obj; 490c8afe684SRob Clark int count = 0; 491c8afe684SRob Clark size_t size = 0; 492c8afe684SRob Clark 493c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 494c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 495c8afe684SRob Clark seq_printf(m, " "); 496c8afe684SRob Clark msm_gem_describe(obj, m); 497c8afe684SRob Clark count++; 498c8afe684SRob Clark size += obj->size; 499c8afe684SRob Clark } 500c8afe684SRob Clark 501c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 502c8afe684SRob Clark } 503c8afe684SRob Clark #endif 504c8afe684SRob Clark 505c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 506c8afe684SRob Clark { 507c8afe684SRob Clark struct drm_device *dev = obj->dev; 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++) { 519c8afe684SRob Clark if (msm_obj->domain[id].iova) { 520c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 521c8afe684SRob Clark uint32_t offset = (uint32_t)mmap_offset(obj); 522c8afe684SRob Clark unmap_range(priv->iommus[id], offset, 523c8afe684SRob Clark msm_obj->sgt, obj->size); 524c8afe684SRob Clark } 525c8afe684SRob Clark } 526c8afe684SRob Clark 527c8afe684SRob Clark drm_gem_free_mmap_offset(obj); 528c8afe684SRob Clark 52905b84911SRob Clark if (obj->import_attach) { 53005b84911SRob Clark if (msm_obj->vaddr) 53105b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 53205b84911SRob Clark 53305b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 53405b84911SRob Clark * ours, just free the array we allocated: 53505b84911SRob Clark */ 53605b84911SRob Clark if (msm_obj->pages) 53705b84911SRob Clark drm_free_large(msm_obj->pages); 53805b84911SRob Clark 53905b84911SRob Clark } else { 540c8afe684SRob Clark if (msm_obj->vaddr) 541c8afe684SRob Clark vunmap(msm_obj->vaddr); 542c8afe684SRob Clark put_pages(obj); 54305b84911SRob Clark } 544c8afe684SRob Clark 5457198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 5467198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 5477198e6b0SRob Clark 548c8afe684SRob Clark drm_gem_object_release(obj); 549c8afe684SRob Clark 550c8afe684SRob Clark kfree(msm_obj); 551c8afe684SRob Clark } 552c8afe684SRob Clark 553c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 554c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 555c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 556c8afe684SRob Clark { 557c8afe684SRob Clark struct drm_gem_object *obj; 558c8afe684SRob Clark int ret; 559c8afe684SRob Clark 560c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 561c8afe684SRob Clark if (ret) 562c8afe684SRob Clark return ret; 563c8afe684SRob Clark 564c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 565c8afe684SRob Clark 566c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 567c8afe684SRob Clark 568c8afe684SRob Clark if (IS_ERR(obj)) 569c8afe684SRob Clark return PTR_ERR(obj); 570c8afe684SRob Clark 571c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 572c8afe684SRob Clark 573c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 574c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 575c8afe684SRob Clark 576c8afe684SRob Clark return ret; 577c8afe684SRob Clark } 578c8afe684SRob Clark 57905b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 58005b84911SRob Clark uint32_t size, uint32_t flags, 58105b84911SRob Clark struct drm_gem_object **obj) 582c8afe684SRob Clark { 583c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 584c8afe684SRob Clark struct msm_gem_object *msm_obj; 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 597c8afe684SRob Clark msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 59805b84911SRob Clark if (!msm_obj) 59905b84911SRob Clark return -ENOMEM; 600c8afe684SRob Clark 601c8afe684SRob Clark msm_obj->flags = flags; 602c8afe684SRob Clark 6037198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 6047198e6b0SRob Clark reservation_object_init(msm_obj->resv); 605c8afe684SRob Clark 6067198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 6077198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->inactive_work); 608c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 609c8afe684SRob Clark 61005b84911SRob Clark *obj = &msm_obj->base; 61105b84911SRob Clark 61205b84911SRob Clark return 0; 61305b84911SRob Clark } 61405b84911SRob Clark 61505b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 61605b84911SRob Clark uint32_t size, uint32_t flags) 61705b84911SRob Clark { 61805b84911SRob Clark struct drm_gem_object *obj; 61905b84911SRob Clark int ret; 62005b84911SRob Clark 62105b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 62205b84911SRob Clark 62305b84911SRob Clark size = PAGE_ALIGN(size); 62405b84911SRob Clark 62505b84911SRob Clark ret = msm_gem_new_impl(dev, size, flags, &obj); 62605b84911SRob Clark if (ret) 62705b84911SRob Clark goto fail; 62805b84911SRob Clark 62905b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 63005b84911SRob Clark if (ret) 63105b84911SRob Clark goto fail; 63205b84911SRob Clark 63305b84911SRob Clark return obj; 63405b84911SRob Clark 63505b84911SRob Clark fail: 63605b84911SRob Clark if (obj) 63705b84911SRob Clark drm_gem_object_unreference_unlocked(obj); 63805b84911SRob Clark 63905b84911SRob Clark return ERR_PTR(ret); 64005b84911SRob Clark } 64105b84911SRob Clark 64205b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 64305b84911SRob Clark uint32_t size, struct sg_table *sgt) 64405b84911SRob Clark { 64505b84911SRob Clark struct msm_gem_object *msm_obj; 64605b84911SRob Clark struct drm_gem_object *obj; 64705b84911SRob Clark int ret, npages; 64805b84911SRob Clark 64905b84911SRob Clark size = PAGE_ALIGN(size); 65005b84911SRob Clark 65105b84911SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); 65205b84911SRob Clark if (ret) 65305b84911SRob Clark goto fail; 65405b84911SRob Clark 65505b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 65605b84911SRob Clark 65705b84911SRob Clark npages = size / PAGE_SIZE; 65805b84911SRob Clark 65905b84911SRob Clark msm_obj = to_msm_bo(obj); 66005b84911SRob Clark msm_obj->sgt = sgt; 66105b84911SRob Clark msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); 66205b84911SRob Clark if (!msm_obj->pages) { 66305b84911SRob Clark ret = -ENOMEM; 66405b84911SRob Clark goto fail; 66505b84911SRob Clark } 66605b84911SRob Clark 66705b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 66805b84911SRob Clark if (ret) 66905b84911SRob Clark goto fail; 67005b84911SRob Clark 671c8afe684SRob Clark return obj; 672c8afe684SRob Clark 673c8afe684SRob Clark fail: 674c8afe684SRob Clark if (obj) 675c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 676c8afe684SRob Clark 677c8afe684SRob Clark return ERR_PTR(ret); 678c8afe684SRob Clark } 679