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> 20c8afe684SRob Clark 21c8afe684SRob Clark #include "msm_drv.h" 22c8afe684SRob Clark #include "msm_gem.h" 237198e6b0SRob Clark #include "msm_gpu.h" 24c8afe684SRob Clark 25c8afe684SRob Clark 26c8afe684SRob Clark /* called with dev->struct_mutex held */ 27c8afe684SRob Clark static struct page **get_pages(struct drm_gem_object *obj) 28c8afe684SRob Clark { 29c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 30c8afe684SRob Clark 31c8afe684SRob Clark if (!msm_obj->pages) { 32c8afe684SRob Clark struct drm_device *dev = obj->dev; 33c8afe684SRob Clark struct page **p = drm_gem_get_pages(obj, 0); 34c8afe684SRob Clark int npages = obj->size >> PAGE_SHIFT; 35c8afe684SRob Clark 36c8afe684SRob Clark if (IS_ERR(p)) { 37c8afe684SRob Clark dev_err(dev->dev, "could not get pages: %ld\n", 38c8afe684SRob Clark PTR_ERR(p)); 39c8afe684SRob Clark return p; 40c8afe684SRob Clark } 41c8afe684SRob Clark 42c8afe684SRob Clark msm_obj->sgt = drm_prime_pages_to_sg(p, npages); 431f70e079SWei Yongjun if (IS_ERR(msm_obj->sgt)) { 44c8afe684SRob Clark dev_err(dev->dev, "failed to allocate sgt\n"); 451f70e079SWei Yongjun return ERR_CAST(msm_obj->sgt); 46c8afe684SRob Clark } 47c8afe684SRob Clark 48c8afe684SRob Clark msm_obj->pages = p; 49c8afe684SRob Clark 50c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 51c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 52c8afe684SRob Clark */ 53c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 54c8afe684SRob Clark dma_map_sg(dev->dev, msm_obj->sgt->sgl, 55c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 56c8afe684SRob Clark } 57c8afe684SRob Clark 58c8afe684SRob Clark return msm_obj->pages; 59c8afe684SRob Clark } 60c8afe684SRob Clark 61c8afe684SRob Clark static void put_pages(struct drm_gem_object *obj) 62c8afe684SRob Clark { 63c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 64c8afe684SRob Clark 65c8afe684SRob Clark if (msm_obj->pages) { 66c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 67c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 68c8afe684SRob Clark */ 69c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 70c8afe684SRob Clark dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, 71c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 72c8afe684SRob Clark sg_free_table(msm_obj->sgt); 73c8afe684SRob Clark kfree(msm_obj->sgt); 74c8afe684SRob Clark 75c8afe684SRob Clark drm_gem_put_pages(obj, msm_obj->pages, true, false); 76c8afe684SRob Clark msm_obj->pages = NULL; 77c8afe684SRob Clark } 78c8afe684SRob Clark } 79c8afe684SRob Clark 80c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 81c8afe684SRob Clark struct vm_area_struct *vma) 82c8afe684SRob Clark { 83c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 84c8afe684SRob Clark 85c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 86c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 87c8afe684SRob Clark 88c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 89c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 90c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 91c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 92c8afe684SRob Clark } else { 93c8afe684SRob Clark /* 94c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 95c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 96c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 97c8afe684SRob Clark */ 98c8afe684SRob Clark fput(vma->vm_file); 99c8afe684SRob Clark get_file(obj->filp); 100c8afe684SRob Clark vma->vm_pgoff = 0; 101c8afe684SRob Clark vma->vm_file = obj->filp; 102c8afe684SRob Clark 103c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 104c8afe684SRob Clark } 105c8afe684SRob Clark 106c8afe684SRob Clark return 0; 107c8afe684SRob Clark } 108c8afe684SRob Clark 109c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 110c8afe684SRob Clark { 111c8afe684SRob Clark int ret; 112c8afe684SRob Clark 113c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 114c8afe684SRob Clark if (ret) { 115c8afe684SRob Clark DBG("mmap failed: %d", ret); 116c8afe684SRob Clark return ret; 117c8afe684SRob Clark } 118c8afe684SRob Clark 119c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 120c8afe684SRob Clark } 121c8afe684SRob Clark 122c8afe684SRob Clark int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 123c8afe684SRob Clark { 124c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 125c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 126c8afe684SRob Clark struct drm_device *dev = obj->dev; 127c8afe684SRob Clark struct page **pages; 128c8afe684SRob Clark unsigned long pfn; 129c8afe684SRob Clark pgoff_t pgoff; 130c8afe684SRob Clark int ret; 131c8afe684SRob Clark 132c8afe684SRob Clark /* Make sure we don't parallel update on a fault, nor move or remove 133c8afe684SRob Clark * something from beneath our feet 134c8afe684SRob Clark */ 135c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 136c8afe684SRob Clark if (ret) 137c8afe684SRob Clark goto out; 138c8afe684SRob Clark 139c8afe684SRob Clark /* make sure we have pages attached now */ 140c8afe684SRob Clark pages = get_pages(obj); 141c8afe684SRob Clark if (IS_ERR(pages)) { 142c8afe684SRob Clark ret = PTR_ERR(pages); 143c8afe684SRob Clark goto out_unlock; 144c8afe684SRob Clark } 145c8afe684SRob Clark 146c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 147c8afe684SRob Clark pgoff = ((unsigned long)vmf->virtual_address - 148c8afe684SRob Clark vma->vm_start) >> PAGE_SHIFT; 149c8afe684SRob Clark 150c8afe684SRob Clark pfn = page_to_pfn(msm_obj->pages[pgoff]); 151c8afe684SRob Clark 152c8afe684SRob Clark VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, 153c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 154c8afe684SRob Clark 155c8afe684SRob Clark ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn); 156c8afe684SRob Clark 157c8afe684SRob Clark out_unlock: 158c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 159c8afe684SRob Clark out: 160c8afe684SRob Clark switch (ret) { 161c8afe684SRob Clark case -EAGAIN: 162c8afe684SRob Clark set_need_resched(); 163c8afe684SRob Clark case 0: 164c8afe684SRob Clark case -ERESTARTSYS: 165c8afe684SRob Clark case -EINTR: 166c8afe684SRob Clark return VM_FAULT_NOPAGE; 167c8afe684SRob Clark case -ENOMEM: 168c8afe684SRob Clark return VM_FAULT_OOM; 169c8afe684SRob Clark default: 170c8afe684SRob Clark return VM_FAULT_SIGBUS; 171c8afe684SRob Clark } 172c8afe684SRob Clark } 173c8afe684SRob Clark 174c8afe684SRob Clark /** get mmap offset */ 175c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 176c8afe684SRob Clark { 177c8afe684SRob Clark struct drm_device *dev = obj->dev; 178c8afe684SRob Clark int ret; 179c8afe684SRob Clark 180c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 181c8afe684SRob Clark 182c8afe684SRob Clark /* Make it mmapable */ 183c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 184c8afe684SRob Clark 185c8afe684SRob Clark if (ret) { 186c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 187c8afe684SRob Clark return 0; 188c8afe684SRob Clark } 189c8afe684SRob Clark 190c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 191c8afe684SRob Clark } 192c8afe684SRob Clark 193c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 194c8afe684SRob Clark { 195c8afe684SRob Clark uint64_t offset; 196c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 197c8afe684SRob Clark offset = mmap_offset(obj); 198c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 199c8afe684SRob Clark return offset; 200c8afe684SRob Clark } 201c8afe684SRob Clark 202c8afe684SRob Clark /* helpers for dealing w/ iommu: */ 203c8afe684SRob Clark static int map_range(struct iommu_domain *domain, unsigned int iova, 204c8afe684SRob Clark struct sg_table *sgt, unsigned int len, int prot) 205c8afe684SRob Clark { 206c8afe684SRob Clark struct scatterlist *sg; 207c8afe684SRob Clark unsigned int da = iova; 208c8afe684SRob Clark unsigned int i, j; 209c8afe684SRob Clark int ret; 210c8afe684SRob Clark 211c8afe684SRob Clark if (!domain || !sgt) 212c8afe684SRob Clark return -EINVAL; 213c8afe684SRob Clark 214c8afe684SRob Clark for_each_sg(sgt->sgl, sg, sgt->nents, i) { 215c8afe684SRob Clark u32 pa = sg_phys(sg) - sg->offset; 216c8afe684SRob Clark size_t bytes = sg->length + sg->offset; 217c8afe684SRob Clark 218c8afe684SRob Clark VERB("map[%d]: %08x %08x(%x)", i, iova, pa, bytes); 219c8afe684SRob Clark 220c8afe684SRob Clark ret = iommu_map(domain, da, pa, bytes, prot); 221c8afe684SRob Clark if (ret) 222c8afe684SRob Clark goto fail; 223c8afe684SRob Clark 224c8afe684SRob Clark da += bytes; 225c8afe684SRob Clark } 226c8afe684SRob Clark 227c8afe684SRob Clark return 0; 228c8afe684SRob Clark 229c8afe684SRob Clark fail: 230c8afe684SRob Clark da = iova; 231c8afe684SRob Clark 232c8afe684SRob Clark for_each_sg(sgt->sgl, sg, i, j) { 233c8afe684SRob Clark size_t bytes = sg->length + sg->offset; 234c8afe684SRob Clark iommu_unmap(domain, da, bytes); 235c8afe684SRob Clark da += bytes; 236c8afe684SRob Clark } 237c8afe684SRob Clark return ret; 238c8afe684SRob Clark } 239c8afe684SRob Clark 240c8afe684SRob Clark static void unmap_range(struct iommu_domain *domain, unsigned int iova, 241c8afe684SRob Clark struct sg_table *sgt, unsigned int len) 242c8afe684SRob Clark { 243c8afe684SRob Clark struct scatterlist *sg; 244c8afe684SRob Clark unsigned int da = iova; 245c8afe684SRob Clark int i; 246c8afe684SRob Clark 247c8afe684SRob Clark for_each_sg(sgt->sgl, sg, sgt->nents, i) { 248c8afe684SRob Clark size_t bytes = sg->length + sg->offset; 249c8afe684SRob Clark size_t unmapped; 250c8afe684SRob Clark 251c8afe684SRob Clark unmapped = iommu_unmap(domain, da, bytes); 252c8afe684SRob Clark if (unmapped < bytes) 253c8afe684SRob Clark break; 254c8afe684SRob Clark 255c8afe684SRob Clark VERB("unmap[%d]: %08x(%x)", i, iova, bytes); 256c8afe684SRob Clark 257c8afe684SRob Clark BUG_ON(!IS_ALIGNED(bytes, PAGE_SIZE)); 258c8afe684SRob Clark 259c8afe684SRob Clark da += bytes; 260c8afe684SRob Clark } 261c8afe684SRob Clark } 262c8afe684SRob Clark 263c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 264c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 265c8afe684SRob Clark * iova ref if you know one is already held. 266c8afe684SRob Clark * 267c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 268c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 269c8afe684SRob Clark */ 270c8afe684SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, 271c8afe684SRob Clark uint32_t *iova) 272c8afe684SRob Clark { 273c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 274c8afe684SRob Clark int ret = 0; 275c8afe684SRob Clark 276c8afe684SRob Clark if (!msm_obj->domain[id].iova) { 277c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 278c8afe684SRob Clark uint32_t offset = (uint32_t)mmap_offset(obj); 279c8afe684SRob Clark struct page **pages; 280c8afe684SRob Clark pages = get_pages(obj); 281c8afe684SRob Clark if (IS_ERR(pages)) 282c8afe684SRob Clark return PTR_ERR(pages); 283c8afe684SRob Clark // XXX ideally we would not map buffers writable when not needed... 284c8afe684SRob Clark ret = map_range(priv->iommus[id], offset, msm_obj->sgt, 285c8afe684SRob Clark obj->size, IOMMU_READ | IOMMU_WRITE); 286c8afe684SRob Clark msm_obj->domain[id].iova = offset; 287c8afe684SRob Clark } 288c8afe684SRob Clark 289c8afe684SRob Clark if (!ret) 290c8afe684SRob Clark *iova = msm_obj->domain[id].iova; 291c8afe684SRob Clark 292c8afe684SRob Clark return ret; 293c8afe684SRob Clark } 294c8afe684SRob Clark 295c8afe684SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) 296c8afe684SRob Clark { 297c8afe684SRob Clark int ret; 298c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 299c8afe684SRob Clark ret = msm_gem_get_iova_locked(obj, id, iova); 300c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 301c8afe684SRob Clark return ret; 302c8afe684SRob Clark } 303c8afe684SRob Clark 304c8afe684SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, int id) 305c8afe684SRob Clark { 306c8afe684SRob Clark // XXX TODO .. 307c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 308c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 309c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 310c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 311c8afe684SRob Clark // things that are no longer needed.. 312c8afe684SRob Clark } 313c8afe684SRob Clark 314c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 315c8afe684SRob Clark struct drm_mode_create_dumb *args) 316c8afe684SRob Clark { 317c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 318c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 319c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 320c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 321c8afe684SRob Clark } 322c8afe684SRob Clark 323c8afe684SRob Clark int msm_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev, 324c8afe684SRob Clark uint32_t handle) 325c8afe684SRob Clark { 326c8afe684SRob Clark /* No special work needed, drop the reference and see what falls out */ 327c8afe684SRob Clark return drm_gem_handle_delete(file, handle); 328c8afe684SRob Clark } 329c8afe684SRob Clark 330c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 331c8afe684SRob Clark uint32_t handle, uint64_t *offset) 332c8afe684SRob Clark { 333c8afe684SRob Clark struct drm_gem_object *obj; 334c8afe684SRob Clark int ret = 0; 335c8afe684SRob Clark 336c8afe684SRob Clark /* GEM does all our handle to object mapping */ 337c8afe684SRob Clark obj = drm_gem_object_lookup(dev, file, handle); 338c8afe684SRob Clark if (obj == NULL) { 339c8afe684SRob Clark ret = -ENOENT; 340c8afe684SRob Clark goto fail; 341c8afe684SRob Clark } 342c8afe684SRob Clark 343c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 344c8afe684SRob Clark 345c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 346c8afe684SRob Clark 347c8afe684SRob Clark fail: 348c8afe684SRob Clark return ret; 349c8afe684SRob Clark } 350c8afe684SRob Clark 351c8afe684SRob Clark void *msm_gem_vaddr_locked(struct drm_gem_object *obj) 352c8afe684SRob Clark { 353c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 354c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 355c8afe684SRob Clark if (!msm_obj->vaddr) { 356c8afe684SRob Clark struct page **pages = get_pages(obj); 357c8afe684SRob Clark if (IS_ERR(pages)) 358c8afe684SRob Clark return ERR_CAST(pages); 359c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 360c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 361c8afe684SRob Clark } 362c8afe684SRob Clark return msm_obj->vaddr; 363c8afe684SRob Clark } 364c8afe684SRob Clark 365c8afe684SRob Clark void *msm_gem_vaddr(struct drm_gem_object *obj) 366c8afe684SRob Clark { 367c8afe684SRob Clark void *ret; 368c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 369c8afe684SRob Clark ret = msm_gem_vaddr_locked(obj); 370c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 371c8afe684SRob Clark return ret; 372c8afe684SRob Clark } 373c8afe684SRob Clark 374c8afe684SRob Clark int msm_gem_queue_inactive_work(struct drm_gem_object *obj, 375c8afe684SRob Clark struct work_struct *work) 376c8afe684SRob Clark { 377c8afe684SRob Clark struct drm_device *dev = obj->dev; 378c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 3797198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3807198e6b0SRob Clark int ret = 0; 381c8afe684SRob Clark 3827198e6b0SRob Clark mutex_lock(&dev->struct_mutex); 3837198e6b0SRob Clark if (!list_empty(&work->entry)) { 3847198e6b0SRob Clark ret = -EINVAL; 3857198e6b0SRob Clark } else if (is_active(msm_obj)) { 3867198e6b0SRob Clark list_add_tail(&work->entry, &msm_obj->inactive_work); 3877198e6b0SRob Clark } else { 388c8afe684SRob Clark queue_work(priv->wq, work); 3897198e6b0SRob Clark } 3907198e6b0SRob Clark mutex_unlock(&dev->struct_mutex); 391c8afe684SRob Clark 3927198e6b0SRob Clark return ret; 3937198e6b0SRob Clark } 3947198e6b0SRob Clark 3957198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 396bf6811f3SRob Clark struct msm_gpu *gpu, bool write, uint32_t fence) 3977198e6b0SRob Clark { 3987198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3997198e6b0SRob Clark msm_obj->gpu = gpu; 400bf6811f3SRob Clark if (write) 401bf6811f3SRob Clark msm_obj->write_fence = fence; 402bf6811f3SRob Clark else 403bf6811f3SRob Clark msm_obj->read_fence = fence; 4047198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4057198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 4067198e6b0SRob Clark } 4077198e6b0SRob Clark 4087198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 4097198e6b0SRob Clark { 4107198e6b0SRob Clark struct drm_device *dev = obj->dev; 4117198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 4127198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4137198e6b0SRob Clark 4147198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 4157198e6b0SRob Clark 4167198e6b0SRob Clark msm_obj->gpu = NULL; 417bf6811f3SRob Clark msm_obj->read_fence = 0; 418bf6811f3SRob Clark msm_obj->write_fence = 0; 4197198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 4207198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 4217198e6b0SRob Clark 4227198e6b0SRob Clark while (!list_empty(&msm_obj->inactive_work)) { 4237198e6b0SRob Clark struct work_struct *work; 4247198e6b0SRob Clark 4257198e6b0SRob Clark work = list_first_entry(&msm_obj->inactive_work, 4267198e6b0SRob Clark struct work_struct, entry); 4277198e6b0SRob Clark 4287198e6b0SRob Clark list_del_init(&work->entry); 4297198e6b0SRob Clark queue_work(priv->wq, work); 4307198e6b0SRob Clark } 4317198e6b0SRob Clark } 4327198e6b0SRob Clark 4337198e6b0SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, 4347198e6b0SRob Clark struct timespec *timeout) 4357198e6b0SRob Clark { 4367198e6b0SRob Clark struct drm_device *dev = obj->dev; 4377198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 4387198e6b0SRob Clark int ret = 0; 4397198e6b0SRob Clark 440f816f272SRob Clark if (is_active(msm_obj)) { 441bf6811f3SRob Clark uint32_t fence = 0; 442f816f272SRob Clark 443bf6811f3SRob Clark if (op & MSM_PREP_READ) 444bf6811f3SRob Clark fence = msm_obj->write_fence; 445bf6811f3SRob Clark if (op & MSM_PREP_WRITE) 446bf6811f3SRob Clark fence = max(fence, msm_obj->read_fence); 447f816f272SRob Clark if (op & MSM_PREP_NOSYNC) 448f816f272SRob Clark timeout = NULL; 449f816f272SRob Clark 450bf6811f3SRob Clark ret = msm_wait_fence_interruptable(dev, fence, timeout); 451bf6811f3SRob Clark } 4527198e6b0SRob Clark 4537198e6b0SRob Clark /* TODO cache maintenance */ 4547198e6b0SRob Clark 4557198e6b0SRob Clark return ret; 4567198e6b0SRob Clark } 4577198e6b0SRob Clark 4587198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 4597198e6b0SRob Clark { 4607198e6b0SRob Clark /* TODO cache maintenance */ 461c8afe684SRob Clark return 0; 462c8afe684SRob Clark } 463c8afe684SRob Clark 464c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 465c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 466c8afe684SRob Clark { 467c8afe684SRob Clark struct drm_device *dev = obj->dev; 468c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 469c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 470c8afe684SRob Clark 471c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 472bf6811f3SRob Clark seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %d\n", 4737198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 474bf6811f3SRob Clark msm_obj->read_fence, msm_obj->write_fence, 475bf6811f3SRob Clark obj->name, obj->refcount.refcount.counter, 476c8afe684SRob Clark off, msm_obj->vaddr, obj->size); 477c8afe684SRob Clark } 478c8afe684SRob Clark 479c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 480c8afe684SRob Clark { 481c8afe684SRob Clark struct msm_gem_object *msm_obj; 482c8afe684SRob Clark int count = 0; 483c8afe684SRob Clark size_t size = 0; 484c8afe684SRob Clark 485c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 486c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 487c8afe684SRob Clark seq_printf(m, " "); 488c8afe684SRob Clark msm_gem_describe(obj, m); 489c8afe684SRob Clark count++; 490c8afe684SRob Clark size += obj->size; 491c8afe684SRob Clark } 492c8afe684SRob Clark 493c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 494c8afe684SRob Clark } 495c8afe684SRob Clark #endif 496c8afe684SRob Clark 497c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 498c8afe684SRob Clark { 499c8afe684SRob Clark struct drm_device *dev = obj->dev; 500c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 501c8afe684SRob Clark int id; 502c8afe684SRob Clark 503c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 504c8afe684SRob Clark 5057198e6b0SRob Clark /* object should not be on active list: */ 5067198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 5077198e6b0SRob Clark 508c8afe684SRob Clark list_del(&msm_obj->mm_list); 509c8afe684SRob Clark 510c8afe684SRob Clark for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { 511c8afe684SRob Clark if (msm_obj->domain[id].iova) { 512c8afe684SRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 513c8afe684SRob Clark uint32_t offset = (uint32_t)mmap_offset(obj); 514c8afe684SRob Clark unmap_range(priv->iommus[id], offset, 515c8afe684SRob Clark msm_obj->sgt, obj->size); 516c8afe684SRob Clark } 517c8afe684SRob Clark } 518c8afe684SRob Clark 519c8afe684SRob Clark drm_gem_free_mmap_offset(obj); 520c8afe684SRob Clark 521c8afe684SRob Clark if (msm_obj->vaddr) 522c8afe684SRob Clark vunmap(msm_obj->vaddr); 523c8afe684SRob Clark 524c8afe684SRob Clark put_pages(obj); 525c8afe684SRob Clark 5267198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 5277198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 5287198e6b0SRob Clark 529c8afe684SRob Clark drm_gem_object_release(obj); 530c8afe684SRob Clark 531c8afe684SRob Clark kfree(msm_obj); 532c8afe684SRob Clark } 533c8afe684SRob Clark 534c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 535c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 536c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 537c8afe684SRob Clark { 538c8afe684SRob Clark struct drm_gem_object *obj; 539c8afe684SRob Clark int ret; 540c8afe684SRob Clark 541c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 542c8afe684SRob Clark if (ret) 543c8afe684SRob Clark return ret; 544c8afe684SRob Clark 545c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 546c8afe684SRob Clark 547c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 548c8afe684SRob Clark 549c8afe684SRob Clark if (IS_ERR(obj)) 550c8afe684SRob Clark return PTR_ERR(obj); 551c8afe684SRob Clark 552c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 553c8afe684SRob Clark 554c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 555c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 556c8afe684SRob Clark 557c8afe684SRob Clark return ret; 558c8afe684SRob Clark } 559c8afe684SRob Clark 560c8afe684SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 561c8afe684SRob Clark uint32_t size, uint32_t flags) 562c8afe684SRob Clark { 563c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 564c8afe684SRob Clark struct msm_gem_object *msm_obj; 565c8afe684SRob Clark struct drm_gem_object *obj = NULL; 566c8afe684SRob Clark int ret; 567c8afe684SRob Clark 568c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 569c8afe684SRob Clark 570c8afe684SRob Clark size = PAGE_ALIGN(size); 571c8afe684SRob Clark 572c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 573c8afe684SRob Clark case MSM_BO_UNCACHED: 574c8afe684SRob Clark case MSM_BO_CACHED: 575c8afe684SRob Clark case MSM_BO_WC: 576c8afe684SRob Clark break; 577c8afe684SRob Clark default: 578c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 579c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 580c8afe684SRob Clark ret = -EINVAL; 581c8afe684SRob Clark goto fail; 582c8afe684SRob Clark } 583c8afe684SRob Clark 584c8afe684SRob Clark msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 585c8afe684SRob Clark if (!msm_obj) { 586c8afe684SRob Clark ret = -ENOMEM; 587c8afe684SRob Clark goto fail; 588c8afe684SRob Clark } 589c8afe684SRob Clark 590c8afe684SRob Clark obj = &msm_obj->base; 591c8afe684SRob Clark 592c8afe684SRob Clark ret = drm_gem_object_init(dev, obj, size); 593c8afe684SRob Clark if (ret) 594c8afe684SRob Clark goto fail; 595c8afe684SRob Clark 596c8afe684SRob Clark msm_obj->flags = flags; 597c8afe684SRob Clark 5987198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 5997198e6b0SRob Clark reservation_object_init(msm_obj->resv); 600c8afe684SRob Clark 6017198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 6027198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->inactive_work); 603c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 604c8afe684SRob Clark 605c8afe684SRob Clark return obj; 606c8afe684SRob Clark 607c8afe684SRob Clark fail: 608c8afe684SRob Clark if (obj) 609c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 610c8afe684SRob Clark 611c8afe684SRob Clark return ERR_PTR(ret); 612c8afe684SRob Clark } 613