1c8afe684SRob Clark /* 2c8afe684SRob Clark * Copyright (C) 2013 Red Hat 3c8afe684SRob Clark * Author: Rob Clark <robdclark@gmail.com> 4c8afe684SRob Clark * 5c8afe684SRob Clark * This program is free software; you can redistribute it and/or modify it 6c8afe684SRob Clark * under the terms of the GNU General Public License version 2 as published by 7c8afe684SRob Clark * the Free Software Foundation. 8c8afe684SRob Clark * 9c8afe684SRob Clark * This program is distributed in the hope that it will be useful, but WITHOUT 10c8afe684SRob Clark * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11c8afe684SRob Clark * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12c8afe684SRob Clark * more details. 13c8afe684SRob Clark * 14c8afe684SRob Clark * You should have received a copy of the GNU General Public License along with 15c8afe684SRob Clark * this program. If not, see <http://www.gnu.org/licenses/>. 16c8afe684SRob Clark */ 17c8afe684SRob Clark 18c8afe684SRob Clark #include <linux/spinlock.h> 19c8afe684SRob Clark #include <linux/shmem_fs.h> 2005b84911SRob Clark #include <linux/dma-buf.h> 2101c8f1c4SDan Williams #include <linux/pfn_t.h> 22c8afe684SRob Clark 23c8afe684SRob Clark #include "msm_drv.h" 24fde5de6cSRob Clark #include "msm_fence.h" 25c8afe684SRob Clark #include "msm_gem.h" 267198e6b0SRob Clark #include "msm_gpu.h" 27871d812aSRob Clark #include "msm_mmu.h" 28c8afe684SRob Clark 29871d812aSRob Clark static dma_addr_t physaddr(struct drm_gem_object *obj) 30871d812aSRob Clark { 31871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 32871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 33871d812aSRob Clark return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + 34871d812aSRob Clark priv->vram.paddr; 35871d812aSRob Clark } 36871d812aSRob Clark 37072f1f91SRob Clark static bool use_pages(struct drm_gem_object *obj) 38072f1f91SRob Clark { 39072f1f91SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 40072f1f91SRob Clark return !msm_obj->vram_node; 41072f1f91SRob Clark } 42072f1f91SRob Clark 43871d812aSRob Clark /* allocate pages from VRAM carveout, used when no IOMMU: */ 44871d812aSRob Clark static struct page **get_pages_vram(struct drm_gem_object *obj, 45871d812aSRob Clark int npages) 46871d812aSRob Clark { 47871d812aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 48871d812aSRob Clark struct msm_drm_private *priv = obj->dev->dev_private; 49871d812aSRob Clark dma_addr_t paddr; 50871d812aSRob Clark struct page **p; 51871d812aSRob Clark int ret, i; 52871d812aSRob Clark 532098105eSMichal Hocko p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 54871d812aSRob Clark if (!p) 55871d812aSRob Clark return ERR_PTR(-ENOMEM); 56871d812aSRob Clark 574e64e553SChris Wilson ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages); 58871d812aSRob Clark if (ret) { 592098105eSMichal Hocko kvfree(p); 60871d812aSRob Clark return ERR_PTR(ret); 61871d812aSRob Clark } 62871d812aSRob Clark 63871d812aSRob Clark paddr = physaddr(obj); 64871d812aSRob Clark for (i = 0; i < npages; i++) { 65871d812aSRob Clark p[i] = phys_to_page(paddr); 66871d812aSRob Clark paddr += PAGE_SIZE; 67871d812aSRob Clark } 68871d812aSRob Clark 69871d812aSRob Clark return p; 70871d812aSRob Clark } 71c8afe684SRob Clark 72c8afe684SRob Clark /* called with dev->struct_mutex held */ 73c8afe684SRob Clark static struct page **get_pages(struct drm_gem_object *obj) 74c8afe684SRob Clark { 75c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 76c8afe684SRob Clark 77c8afe684SRob Clark if (!msm_obj->pages) { 78c8afe684SRob Clark struct drm_device *dev = obj->dev; 79871d812aSRob Clark struct page **p; 80c8afe684SRob Clark int npages = obj->size >> PAGE_SHIFT; 81c8afe684SRob Clark 82072f1f91SRob Clark if (use_pages(obj)) 830cdbe8acSDavid Herrmann p = drm_gem_get_pages(obj); 84871d812aSRob Clark else 85871d812aSRob Clark p = get_pages_vram(obj, npages); 86871d812aSRob Clark 87c8afe684SRob Clark if (IS_ERR(p)) { 88c8afe684SRob Clark dev_err(dev->dev, "could not get pages: %ld\n", 89c8afe684SRob Clark PTR_ERR(p)); 90c8afe684SRob Clark return p; 91c8afe684SRob Clark } 92c8afe684SRob Clark 93c8afe684SRob Clark msm_obj->sgt = drm_prime_pages_to_sg(p, npages); 941f70e079SWei Yongjun if (IS_ERR(msm_obj->sgt)) { 95c8afe684SRob Clark dev_err(dev->dev, "failed to allocate sgt\n"); 961f70e079SWei Yongjun return ERR_CAST(msm_obj->sgt); 97c8afe684SRob Clark } 98c8afe684SRob Clark 99c8afe684SRob Clark msm_obj->pages = p; 100c8afe684SRob Clark 101c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 102c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 103c8afe684SRob Clark */ 104c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 105c8afe684SRob Clark dma_map_sg(dev->dev, msm_obj->sgt->sgl, 106c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 107c8afe684SRob Clark } 108c8afe684SRob Clark 109c8afe684SRob Clark return msm_obj->pages; 110c8afe684SRob Clark } 111c8afe684SRob Clark 112c8afe684SRob Clark static void put_pages(struct drm_gem_object *obj) 113c8afe684SRob Clark { 114c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 115c8afe684SRob Clark 116c8afe684SRob Clark if (msm_obj->pages) { 117c8afe684SRob Clark /* For non-cached buffers, ensure the new pages are clean 118c8afe684SRob Clark * because display controller, GPU, etc. are not coherent: 119c8afe684SRob Clark */ 120c8afe684SRob Clark if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) 121c8afe684SRob Clark dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, 122c8afe684SRob Clark msm_obj->sgt->nents, DMA_BIDIRECTIONAL); 123c8afe684SRob Clark sg_free_table(msm_obj->sgt); 124c8afe684SRob Clark kfree(msm_obj->sgt); 125c8afe684SRob Clark 126072f1f91SRob Clark if (use_pages(obj)) 127c8afe684SRob Clark drm_gem_put_pages(obj, msm_obj->pages, true, false); 1281ffa2425SMicah Richert else { 129871d812aSRob Clark drm_mm_remove_node(msm_obj->vram_node); 1302098105eSMichal Hocko kvfree(msm_obj->pages); 1311ffa2425SMicah Richert } 132871d812aSRob Clark 133c8afe684SRob Clark msm_obj->pages = NULL; 134c8afe684SRob Clark } 135c8afe684SRob Clark } 136c8afe684SRob Clark 13705b84911SRob Clark struct page **msm_gem_get_pages(struct drm_gem_object *obj) 13805b84911SRob Clark { 13905b84911SRob Clark struct drm_device *dev = obj->dev; 14005b84911SRob Clark struct page **p; 14105b84911SRob Clark mutex_lock(&dev->struct_mutex); 14205b84911SRob Clark p = get_pages(obj); 14305b84911SRob Clark mutex_unlock(&dev->struct_mutex); 14405b84911SRob Clark return p; 14505b84911SRob Clark } 14605b84911SRob Clark 14705b84911SRob Clark void msm_gem_put_pages(struct drm_gem_object *obj) 14805b84911SRob Clark { 14905b84911SRob Clark /* when we start tracking the pin count, then do something here */ 15005b84911SRob Clark } 15105b84911SRob Clark 152c8afe684SRob Clark int msm_gem_mmap_obj(struct drm_gem_object *obj, 153c8afe684SRob Clark struct vm_area_struct *vma) 154c8afe684SRob Clark { 155c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 156c8afe684SRob Clark 157c8afe684SRob Clark vma->vm_flags &= ~VM_PFNMAP; 158c8afe684SRob Clark vma->vm_flags |= VM_MIXEDMAP; 159c8afe684SRob Clark 160c8afe684SRob Clark if (msm_obj->flags & MSM_BO_WC) { 161c8afe684SRob Clark vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); 162c8afe684SRob Clark } else if (msm_obj->flags & MSM_BO_UNCACHED) { 163c8afe684SRob Clark vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); 164c8afe684SRob Clark } else { 165c8afe684SRob Clark /* 166c8afe684SRob Clark * Shunt off cached objs to shmem file so they have their own 167c8afe684SRob Clark * address_space (so unmap_mapping_range does what we want, 168c8afe684SRob Clark * in particular in the case of mmap'd dmabufs) 169c8afe684SRob Clark */ 170c8afe684SRob Clark fput(vma->vm_file); 171c8afe684SRob Clark get_file(obj->filp); 172c8afe684SRob Clark vma->vm_pgoff = 0; 173c8afe684SRob Clark vma->vm_file = obj->filp; 174c8afe684SRob Clark 175c8afe684SRob Clark vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); 176c8afe684SRob Clark } 177c8afe684SRob Clark 178c8afe684SRob Clark return 0; 179c8afe684SRob Clark } 180c8afe684SRob Clark 181c8afe684SRob Clark int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) 182c8afe684SRob Clark { 183c8afe684SRob Clark int ret; 184c8afe684SRob Clark 185c8afe684SRob Clark ret = drm_gem_mmap(filp, vma); 186c8afe684SRob Clark if (ret) { 187c8afe684SRob Clark DBG("mmap failed: %d", ret); 188c8afe684SRob Clark return ret; 189c8afe684SRob Clark } 190c8afe684SRob Clark 191c8afe684SRob Clark return msm_gem_mmap_obj(vma->vm_private_data, vma); 192c8afe684SRob Clark } 193c8afe684SRob Clark 19411bac800SDave Jiang int msm_gem_fault(struct vm_fault *vmf) 195c8afe684SRob Clark { 19611bac800SDave Jiang struct vm_area_struct *vma = vmf->vma; 197c8afe684SRob Clark struct drm_gem_object *obj = vma->vm_private_data; 198c8afe684SRob Clark struct drm_device *dev = obj->dev; 199d78d383aSRob Clark struct msm_drm_private *priv = dev->dev_private; 200c8afe684SRob Clark struct page **pages; 201c8afe684SRob Clark unsigned long pfn; 202c8afe684SRob Clark pgoff_t pgoff; 203c8afe684SRob Clark int ret; 204c8afe684SRob Clark 205d78d383aSRob Clark /* This should only happen if userspace tries to pass a mmap'd 206d78d383aSRob Clark * but unfaulted gem bo vaddr into submit ioctl, triggering 207d78d383aSRob Clark * a page fault while struct_mutex is already held. This is 208d78d383aSRob Clark * not a valid use-case so just bail. 209d78d383aSRob Clark */ 210d78d383aSRob Clark if (priv->struct_mutex_task == current) 211d78d383aSRob Clark return VM_FAULT_SIGBUS; 212d78d383aSRob Clark 213c8afe684SRob Clark /* Make sure we don't parallel update on a fault, nor move or remove 214c8afe684SRob Clark * something from beneath our feet 215c8afe684SRob Clark */ 216c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 217c8afe684SRob Clark if (ret) 218c8afe684SRob Clark goto out; 219c8afe684SRob Clark 220c8afe684SRob Clark /* make sure we have pages attached now */ 221c8afe684SRob Clark pages = get_pages(obj); 222c8afe684SRob Clark if (IS_ERR(pages)) { 223c8afe684SRob Clark ret = PTR_ERR(pages); 224c8afe684SRob Clark goto out_unlock; 225c8afe684SRob Clark } 226c8afe684SRob Clark 227c8afe684SRob Clark /* We don't use vmf->pgoff since that has the fake offset: */ 2281a29d85eSJan Kara pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 229c8afe684SRob Clark 230871d812aSRob Clark pfn = page_to_pfn(pages[pgoff]); 231c8afe684SRob Clark 2321a29d85eSJan Kara VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, 233c8afe684SRob Clark pfn, pfn << PAGE_SHIFT); 234c8afe684SRob Clark 2351a29d85eSJan Kara ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); 236c8afe684SRob Clark 237c8afe684SRob Clark out_unlock: 238c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 239c8afe684SRob Clark out: 240c8afe684SRob Clark switch (ret) { 241c8afe684SRob Clark case -EAGAIN: 242c8afe684SRob Clark case 0: 243c8afe684SRob Clark case -ERESTARTSYS: 244c8afe684SRob Clark case -EINTR: 245505886d5SRob Clark case -EBUSY: 246505886d5SRob Clark /* 247505886d5SRob Clark * EBUSY is ok: this just means that another thread 248505886d5SRob Clark * already did the job. 249505886d5SRob Clark */ 250c8afe684SRob Clark return VM_FAULT_NOPAGE; 251c8afe684SRob Clark case -ENOMEM: 252c8afe684SRob Clark return VM_FAULT_OOM; 253c8afe684SRob Clark default: 254c8afe684SRob Clark return VM_FAULT_SIGBUS; 255c8afe684SRob Clark } 256c8afe684SRob Clark } 257c8afe684SRob Clark 258c8afe684SRob Clark /** get mmap offset */ 259c8afe684SRob Clark static uint64_t mmap_offset(struct drm_gem_object *obj) 260c8afe684SRob Clark { 261c8afe684SRob Clark struct drm_device *dev = obj->dev; 262c8afe684SRob Clark int ret; 263c8afe684SRob Clark 264c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 265c8afe684SRob Clark 266c8afe684SRob Clark /* Make it mmapable */ 267c8afe684SRob Clark ret = drm_gem_create_mmap_offset(obj); 268c8afe684SRob Clark 269c8afe684SRob Clark if (ret) { 270c8afe684SRob Clark dev_err(dev->dev, "could not allocate mmap offset\n"); 271c8afe684SRob Clark return 0; 272c8afe684SRob Clark } 273c8afe684SRob Clark 274c8afe684SRob Clark return drm_vma_node_offset_addr(&obj->vma_node); 275c8afe684SRob Clark } 276c8afe684SRob Clark 277c8afe684SRob Clark uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) 278c8afe684SRob Clark { 279c8afe684SRob Clark uint64_t offset; 280c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 281c8afe684SRob Clark offset = mmap_offset(obj); 282c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 283c8afe684SRob Clark return offset; 284c8afe684SRob Clark } 285c8afe684SRob Clark 2864b85f7f5SRob Clark static struct msm_gem_vma *add_vma(struct drm_gem_object *obj, 2874b85f7f5SRob Clark struct msm_gem_address_space *aspace) 2884b85f7f5SRob Clark { 2894b85f7f5SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 2904b85f7f5SRob Clark struct msm_gem_vma *vma; 2914b85f7f5SRob Clark 2924b85f7f5SRob Clark vma = kzalloc(sizeof(*vma), GFP_KERNEL); 2934b85f7f5SRob Clark if (!vma) 2944b85f7f5SRob Clark return ERR_PTR(-ENOMEM); 2954b85f7f5SRob Clark 2964b85f7f5SRob Clark vma->aspace = aspace; 2974b85f7f5SRob Clark 2984b85f7f5SRob Clark list_add_tail(&vma->list, &msm_obj->vmas); 2994b85f7f5SRob Clark 3004b85f7f5SRob Clark return vma; 3014b85f7f5SRob Clark } 3024b85f7f5SRob Clark 3034b85f7f5SRob Clark static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj, 3044b85f7f5SRob Clark struct msm_gem_address_space *aspace) 3054b85f7f5SRob Clark { 3064b85f7f5SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3074b85f7f5SRob Clark struct msm_gem_vma *vma; 3084b85f7f5SRob Clark 3094b85f7f5SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 3104b85f7f5SRob Clark 3114b85f7f5SRob Clark list_for_each_entry(vma, &msm_obj->vmas, list) { 3124b85f7f5SRob Clark if (vma->aspace == aspace) 3134b85f7f5SRob Clark return vma; 3144b85f7f5SRob Clark } 3154b85f7f5SRob Clark 3164b85f7f5SRob Clark return NULL; 3174b85f7f5SRob Clark } 3184b85f7f5SRob Clark 3194b85f7f5SRob Clark static void del_vma(struct msm_gem_vma *vma) 3204b85f7f5SRob Clark { 3214b85f7f5SRob Clark if (!vma) 3224b85f7f5SRob Clark return; 3234b85f7f5SRob Clark 3244b85f7f5SRob Clark list_del(&vma->list); 3254b85f7f5SRob Clark kfree(vma); 3264b85f7f5SRob Clark } 3274b85f7f5SRob Clark 3284fe5f65eSRob Clark static void 3294fe5f65eSRob Clark put_iova(struct drm_gem_object *obj) 3304fe5f65eSRob Clark { 3314fe5f65eSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3324b85f7f5SRob Clark struct msm_gem_vma *vma, *tmp; 3334fe5f65eSRob Clark 3344b85f7f5SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 3354fe5f65eSRob Clark 3364b85f7f5SRob Clark list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) { 3374b85f7f5SRob Clark msm_gem_unmap_vma(vma->aspace, vma, msm_obj->sgt); 3384b85f7f5SRob Clark del_vma(vma); 3394fe5f65eSRob Clark } 3404fe5f65eSRob Clark } 3414fe5f65eSRob Clark 342c8afe684SRob Clark /* should be called under struct_mutex.. although it can be called 343c8afe684SRob Clark * from atomic context without struct_mutex to acquire an extra 344c8afe684SRob Clark * iova ref if you know one is already held. 345c8afe684SRob Clark * 346c8afe684SRob Clark * That means when I do eventually need to add support for unpinning 347c8afe684SRob Clark * the refcnt counter needs to be atomic_t. 348c8afe684SRob Clark */ 3498bdcd949SRob Clark int msm_gem_get_iova_locked(struct drm_gem_object *obj, 3508bdcd949SRob Clark struct msm_gem_address_space *aspace, uint64_t *iova) 351c8afe684SRob Clark { 352c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 3534b85f7f5SRob Clark struct msm_gem_vma *vma; 354c8afe684SRob Clark int ret = 0; 355c8afe684SRob Clark 356cb1e3818SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 357cb1e3818SRob Clark 3584b85f7f5SRob Clark vma = lookup_vma(obj, aspace); 359871d812aSRob Clark 3604b85f7f5SRob Clark if (!vma) { 3614b85f7f5SRob Clark struct page **pages; 362871d812aSRob Clark 3634b85f7f5SRob Clark vma = add_vma(obj, aspace); 3644b85f7f5SRob Clark if (IS_ERR(vma)) 3654b85f7f5SRob Clark return PTR_ERR(vma); 3664b85f7f5SRob Clark 3674b85f7f5SRob Clark pages = get_pages(obj); 3684b85f7f5SRob Clark if (IS_ERR(pages)) { 3694b85f7f5SRob Clark ret = PTR_ERR(pages); 3704b85f7f5SRob Clark goto fail; 371c8afe684SRob Clark } 372c8afe684SRob Clark 3734b85f7f5SRob Clark ret = msm_gem_map_vma(aspace, vma, msm_obj->sgt, 3744b85f7f5SRob Clark obj->size >> PAGE_SHIFT); 3754b85f7f5SRob Clark if (ret) 3764b85f7f5SRob Clark goto fail; 3774b85f7f5SRob Clark } 3784b85f7f5SRob Clark 3794b85f7f5SRob Clark *iova = vma->iova; 3804b85f7f5SRob Clark return 0; 3814b85f7f5SRob Clark 3824b85f7f5SRob Clark fail: 3834b85f7f5SRob Clark del_vma(vma); 384c8afe684SRob Clark 385c8afe684SRob Clark return ret; 386c8afe684SRob Clark } 387c8afe684SRob Clark 3882638d90aSRob Clark /* get iova, taking a reference. Should have a matching put */ 3898bdcd949SRob Clark int msm_gem_get_iova(struct drm_gem_object *obj, 3908bdcd949SRob Clark struct msm_gem_address_space *aspace, uint64_t *iova) 391c8afe684SRob Clark { 392c8afe684SRob Clark int ret; 393edd4fc63SRob Clark 394c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 3958bdcd949SRob Clark ret = msm_gem_get_iova_locked(obj, aspace, iova); 396c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 3974b85f7f5SRob Clark 398c8afe684SRob Clark return ret; 399c8afe684SRob Clark } 400c8afe684SRob Clark 4012638d90aSRob Clark /* get iova without taking a reference, used in places where you have 4022638d90aSRob Clark * already done a 'msm_gem_get_iova()'. 4032638d90aSRob Clark */ 4048bdcd949SRob Clark uint64_t msm_gem_iova(struct drm_gem_object *obj, 4058bdcd949SRob Clark struct msm_gem_address_space *aspace) 4062638d90aSRob Clark { 4074b85f7f5SRob Clark struct msm_gem_vma *vma; 4084b85f7f5SRob Clark 4094b85f7f5SRob Clark mutex_lock(&obj->dev->struct_mutex); 4104b85f7f5SRob Clark vma = lookup_vma(obj, aspace); 4114b85f7f5SRob Clark mutex_unlock(&obj->dev->struct_mutex); 4124b85f7f5SRob Clark WARN_ON(!vma); 4134b85f7f5SRob Clark 4144b85f7f5SRob Clark return vma ? vma->iova : 0; 4152638d90aSRob Clark } 4162638d90aSRob Clark 4178bdcd949SRob Clark void msm_gem_put_iova(struct drm_gem_object *obj, 4188bdcd949SRob Clark struct msm_gem_address_space *aspace) 419c8afe684SRob Clark { 420c8afe684SRob Clark // XXX TODO .. 421c8afe684SRob Clark // NOTE: probably don't need a _locked() version.. we wouldn't 422c8afe684SRob Clark // normally unmap here, but instead just mark that it could be 423c8afe684SRob Clark // unmapped (if the iova refcnt drops to zero), but then later 424c8afe684SRob Clark // if another _get_iova_locked() fails we can start unmapping 425c8afe684SRob Clark // things that are no longer needed.. 426c8afe684SRob Clark } 427c8afe684SRob Clark 428c8afe684SRob Clark int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, 429c8afe684SRob Clark struct drm_mode_create_dumb *args) 430c8afe684SRob Clark { 431c8afe684SRob Clark args->pitch = align_pitch(args->width, args->bpp); 432c8afe684SRob Clark args->size = PAGE_ALIGN(args->pitch * args->height); 433c8afe684SRob Clark return msm_gem_new_handle(dev, file, args->size, 434c8afe684SRob Clark MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); 435c8afe684SRob Clark } 436c8afe684SRob Clark 437c8afe684SRob Clark int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, 438c8afe684SRob Clark uint32_t handle, uint64_t *offset) 439c8afe684SRob Clark { 440c8afe684SRob Clark struct drm_gem_object *obj; 441c8afe684SRob Clark int ret = 0; 442c8afe684SRob Clark 443c8afe684SRob Clark /* GEM does all our handle to object mapping */ 444a8ad0bd8SChris Wilson obj = drm_gem_object_lookup(file, handle); 445c8afe684SRob Clark if (obj == NULL) { 446c8afe684SRob Clark ret = -ENOENT; 447c8afe684SRob Clark goto fail; 448c8afe684SRob Clark } 449c8afe684SRob Clark 450c8afe684SRob Clark *offset = msm_gem_mmap_offset(obj); 451c8afe684SRob Clark 452c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 453c8afe684SRob Clark 454c8afe684SRob Clark fail: 455c8afe684SRob Clark return ret; 456c8afe684SRob Clark } 457c8afe684SRob Clark 45818f23049SRob Clark void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj) 459c8afe684SRob Clark { 460c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 461c8afe684SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 462c8afe684SRob Clark if (!msm_obj->vaddr) { 463c8afe684SRob Clark struct page **pages = get_pages(obj); 464c8afe684SRob Clark if (IS_ERR(pages)) 465c8afe684SRob Clark return ERR_CAST(pages); 466c8afe684SRob Clark msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, 467c8afe684SRob Clark VM_MAP, pgprot_writecombine(PAGE_KERNEL)); 46869a834c2SRob Clark if (msm_obj->vaddr == NULL) 46969a834c2SRob Clark return ERR_PTR(-ENOMEM); 470c8afe684SRob Clark } 471e1e9db2cSRob Clark msm_obj->vmap_count++; 472c8afe684SRob Clark return msm_obj->vaddr; 473c8afe684SRob Clark } 474c8afe684SRob Clark 47518f23049SRob Clark void *msm_gem_get_vaddr(struct drm_gem_object *obj) 476c8afe684SRob Clark { 477c8afe684SRob Clark void *ret; 478c8afe684SRob Clark mutex_lock(&obj->dev->struct_mutex); 47918f23049SRob Clark ret = msm_gem_get_vaddr_locked(obj); 480c8afe684SRob Clark mutex_unlock(&obj->dev->struct_mutex); 481c8afe684SRob Clark return ret; 482c8afe684SRob Clark } 483c8afe684SRob Clark 48418f23049SRob Clark void msm_gem_put_vaddr_locked(struct drm_gem_object *obj) 48518f23049SRob Clark { 486e1e9db2cSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 48718f23049SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 488e1e9db2cSRob Clark WARN_ON(msm_obj->vmap_count < 1); 489e1e9db2cSRob Clark msm_obj->vmap_count--; 49018f23049SRob Clark } 49118f23049SRob Clark 49218f23049SRob Clark void msm_gem_put_vaddr(struct drm_gem_object *obj) 49318f23049SRob Clark { 494e1e9db2cSRob Clark mutex_lock(&obj->dev->struct_mutex); 495e1e9db2cSRob Clark msm_gem_put_vaddr_locked(obj); 496e1e9db2cSRob Clark mutex_unlock(&obj->dev->struct_mutex); 49718f23049SRob Clark } 49818f23049SRob Clark 4994cd33c48SRob Clark /* Update madvise status, returns true if not purged, else 5004cd33c48SRob Clark * false or -errno. 5014cd33c48SRob Clark */ 5024cd33c48SRob Clark int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) 5034cd33c48SRob Clark { 5044cd33c48SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 5054cd33c48SRob Clark 5064cd33c48SRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 5074cd33c48SRob Clark 5084cd33c48SRob Clark if (msm_obj->madv != __MSM_MADV_PURGED) 5094cd33c48SRob Clark msm_obj->madv = madv; 5104cd33c48SRob Clark 5114cd33c48SRob Clark return (msm_obj->madv != __MSM_MADV_PURGED); 5124cd33c48SRob Clark } 5134cd33c48SRob Clark 51468209390SRob Clark void msm_gem_purge(struct drm_gem_object *obj) 51568209390SRob Clark { 51668209390SRob Clark struct drm_device *dev = obj->dev; 51768209390SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 51868209390SRob Clark 51968209390SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 52068209390SRob Clark WARN_ON(!is_purgeable(msm_obj)); 52168209390SRob Clark WARN_ON(obj->import_attach); 52268209390SRob Clark 52368209390SRob Clark put_iova(obj); 52468209390SRob Clark 525e1e9db2cSRob Clark msm_gem_vunmap(obj); 52668209390SRob Clark 52768209390SRob Clark put_pages(obj); 52868209390SRob Clark 52968209390SRob Clark msm_obj->madv = __MSM_MADV_PURGED; 53068209390SRob Clark 53168209390SRob Clark drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); 53268209390SRob Clark drm_gem_free_mmap_offset(obj); 53368209390SRob Clark 53468209390SRob Clark /* Our goal here is to return as much of the memory as 53568209390SRob Clark * is possible back to the system as we are called from OOM. 53668209390SRob Clark * To do this we must instruct the shmfs to drop all of its 53768209390SRob Clark * backing pages, *now*. 53868209390SRob Clark */ 53968209390SRob Clark shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); 54068209390SRob Clark 54168209390SRob Clark invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 54268209390SRob Clark 0, (loff_t)-1); 54368209390SRob Clark } 54468209390SRob Clark 545e1e9db2cSRob Clark void msm_gem_vunmap(struct drm_gem_object *obj) 546e1e9db2cSRob Clark { 547e1e9db2cSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 548e1e9db2cSRob Clark 549e1e9db2cSRob Clark if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj))) 550e1e9db2cSRob Clark return; 551e1e9db2cSRob Clark 552e1e9db2cSRob Clark vunmap(msm_obj->vaddr); 553e1e9db2cSRob Clark msm_obj->vaddr = NULL; 554e1e9db2cSRob Clark } 555e1e9db2cSRob Clark 556b6295f9aSRob Clark /* must be called before _move_to_active().. */ 557b6295f9aSRob Clark int msm_gem_sync_object(struct drm_gem_object *obj, 558b6295f9aSRob Clark struct msm_fence_context *fctx, bool exclusive) 559b6295f9aSRob Clark { 560b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 561b6295f9aSRob Clark struct reservation_object_list *fobj; 562f54d1867SChris Wilson struct dma_fence *fence; 563b6295f9aSRob Clark int i, ret; 564b6295f9aSRob Clark 565b6295f9aSRob Clark if (!exclusive) { 566b6295f9aSRob Clark /* NOTE: _reserve_shared() must happen before _add_shared_fence(), 567b6295f9aSRob Clark * which makes this a slightly strange place to call it. OTOH this 568b6295f9aSRob Clark * is a convenient can-fail point to hook it in. (And similar to 569b6295f9aSRob Clark * how etnaviv and nouveau handle this.) 570b6295f9aSRob Clark */ 571b6295f9aSRob Clark ret = reservation_object_reserve_shared(msm_obj->resv); 572b6295f9aSRob Clark if (ret) 573b6295f9aSRob Clark return ret; 574b6295f9aSRob Clark } 575b6295f9aSRob Clark 576b6295f9aSRob Clark fobj = reservation_object_get_list(msm_obj->resv); 577b6295f9aSRob Clark if (!fobj || (fobj->shared_count == 0)) { 578b6295f9aSRob Clark fence = reservation_object_get_excl(msm_obj->resv); 579b6295f9aSRob Clark /* don't need to wait on our own fences, since ring is fifo */ 580b6295f9aSRob Clark if (fence && (fence->context != fctx->context)) { 581f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 582b6295f9aSRob Clark if (ret) 583b6295f9aSRob Clark return ret; 584b6295f9aSRob Clark } 585b6295f9aSRob Clark } 586b6295f9aSRob Clark 587b6295f9aSRob Clark if (!exclusive || !fobj) 588b6295f9aSRob Clark return 0; 589b6295f9aSRob Clark 590b6295f9aSRob Clark for (i = 0; i < fobj->shared_count; i++) { 591b6295f9aSRob Clark fence = rcu_dereference_protected(fobj->shared[i], 592b6295f9aSRob Clark reservation_object_held(msm_obj->resv)); 593b6295f9aSRob Clark if (fence->context != fctx->context) { 594f54d1867SChris Wilson ret = dma_fence_wait(fence, true); 595b6295f9aSRob Clark if (ret) 596b6295f9aSRob Clark return ret; 597b6295f9aSRob Clark } 598b6295f9aSRob Clark } 599b6295f9aSRob Clark 600b6295f9aSRob Clark return 0; 601b6295f9aSRob Clark } 602b6295f9aSRob Clark 6037198e6b0SRob Clark void msm_gem_move_to_active(struct drm_gem_object *obj, 604f54d1867SChris Wilson struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence) 6057198e6b0SRob Clark { 6067198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 6074cd33c48SRob Clark WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); 6087198e6b0SRob Clark msm_obj->gpu = gpu; 609b6295f9aSRob Clark if (exclusive) 610b6295f9aSRob Clark reservation_object_add_excl_fence(msm_obj->resv, fence); 611bf6811f3SRob Clark else 612b6295f9aSRob Clark reservation_object_add_shared_fence(msm_obj->resv, fence); 6137198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 6147198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &gpu->active_list); 6157198e6b0SRob Clark } 6167198e6b0SRob Clark 6177198e6b0SRob Clark void msm_gem_move_to_inactive(struct drm_gem_object *obj) 6187198e6b0SRob Clark { 6197198e6b0SRob Clark struct drm_device *dev = obj->dev; 6207198e6b0SRob Clark struct msm_drm_private *priv = dev->dev_private; 6217198e6b0SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 6227198e6b0SRob Clark 6237198e6b0SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 6247198e6b0SRob Clark 6257198e6b0SRob Clark msm_obj->gpu = NULL; 6267198e6b0SRob Clark list_del_init(&msm_obj->mm_list); 6277198e6b0SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 6287198e6b0SRob Clark } 6297198e6b0SRob Clark 630ba00c3f2SRob Clark int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) 631ba00c3f2SRob Clark { 632b6295f9aSRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 633b6295f9aSRob Clark bool write = !!(op & MSM_PREP_WRITE); 634f755e227SChris Wilson unsigned long remain = 635f755e227SChris Wilson op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); 636f755e227SChris Wilson long ret; 637b6295f9aSRob Clark 638b6295f9aSRob Clark ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, 639f755e227SChris Wilson true, remain); 640f755e227SChris Wilson if (ret == 0) 641f755e227SChris Wilson return remain == 0 ? -EBUSY : -ETIMEDOUT; 642f755e227SChris Wilson else if (ret < 0) 643f755e227SChris Wilson return ret; 644ba00c3f2SRob Clark 6457198e6b0SRob Clark /* TODO cache maintenance */ 6467198e6b0SRob Clark 647b6295f9aSRob Clark return 0; 6487198e6b0SRob Clark } 6497198e6b0SRob Clark 6507198e6b0SRob Clark int msm_gem_cpu_fini(struct drm_gem_object *obj) 6517198e6b0SRob Clark { 6527198e6b0SRob Clark /* TODO cache maintenance */ 653c8afe684SRob Clark return 0; 654c8afe684SRob Clark } 655c8afe684SRob Clark 656c8afe684SRob Clark #ifdef CONFIG_DEBUG_FS 657f54d1867SChris Wilson static void describe_fence(struct dma_fence *fence, const char *type, 658b6295f9aSRob Clark struct seq_file *m) 659b6295f9aSRob Clark { 660f54d1867SChris Wilson if (!dma_fence_is_signaled(fence)) 661b6295f9aSRob Clark seq_printf(m, "\t%9s: %s %s seq %u\n", type, 662b6295f9aSRob Clark fence->ops->get_driver_name(fence), 663b6295f9aSRob Clark fence->ops->get_timeline_name(fence), 664b6295f9aSRob Clark fence->seqno); 665b6295f9aSRob Clark } 666b6295f9aSRob Clark 667c8afe684SRob Clark void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) 668c8afe684SRob Clark { 669c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 670b6295f9aSRob Clark struct reservation_object *robj = msm_obj->resv; 671b6295f9aSRob Clark struct reservation_object_list *fobj; 672f54d1867SChris Wilson struct dma_fence *fence; 6734b85f7f5SRob Clark struct msm_gem_vma *vma; 674c8afe684SRob Clark uint64_t off = drm_vma_node_start(&obj->vma_node); 6754cd33c48SRob Clark const char *madv; 676c8afe684SRob Clark 677b6295f9aSRob Clark WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); 678b6295f9aSRob Clark 6794cd33c48SRob Clark switch (msm_obj->madv) { 6804cd33c48SRob Clark case __MSM_MADV_PURGED: 6814cd33c48SRob Clark madv = " purged"; 6824cd33c48SRob Clark break; 6834cd33c48SRob Clark case MSM_MADV_DONTNEED: 6844cd33c48SRob Clark madv = " purgeable"; 6854cd33c48SRob Clark break; 6864cd33c48SRob Clark case MSM_MADV_WILLNEED: 6874cd33c48SRob Clark default: 6884cd33c48SRob Clark madv = ""; 6894cd33c48SRob Clark break; 6904cd33c48SRob Clark } 6914cd33c48SRob Clark 692667ce33eSRob Clark seq_printf(m, "%08x: %c %2d (%2d) %08llx %p\t", 6937198e6b0SRob Clark msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', 6942c935bc5SPeter Zijlstra obj->name, kref_read(&obj->refcount), 695667ce33eSRob Clark off, msm_obj->vaddr); 696667ce33eSRob Clark 6974b85f7f5SRob Clark /* FIXME: we need to print the address space here too */ 6984b85f7f5SRob Clark list_for_each_entry(vma, &msm_obj->vmas, list) 6994b85f7f5SRob Clark seq_printf(m, " %08llx", vma->iova); 700667ce33eSRob Clark 701667ce33eSRob Clark seq_printf(m, " %zu%s\n", obj->size, madv); 702b6295f9aSRob Clark 703b6295f9aSRob Clark rcu_read_lock(); 704b6295f9aSRob Clark fobj = rcu_dereference(robj->fence); 705b6295f9aSRob Clark if (fobj) { 706b6295f9aSRob Clark unsigned int i, shared_count = fobj->shared_count; 707b6295f9aSRob Clark 708b6295f9aSRob Clark for (i = 0; i < shared_count; i++) { 709b6295f9aSRob Clark fence = rcu_dereference(fobj->shared[i]); 710b6295f9aSRob Clark describe_fence(fence, "Shared", m); 711b6295f9aSRob Clark } 712b6295f9aSRob Clark } 713b6295f9aSRob Clark 714b6295f9aSRob Clark fence = rcu_dereference(robj->fence_excl); 715b6295f9aSRob Clark if (fence) 716b6295f9aSRob Clark describe_fence(fence, "Exclusive", m); 717b6295f9aSRob Clark rcu_read_unlock(); 718c8afe684SRob Clark } 719c8afe684SRob Clark 720c8afe684SRob Clark void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) 721c8afe684SRob Clark { 722c8afe684SRob Clark struct msm_gem_object *msm_obj; 723c8afe684SRob Clark int count = 0; 724c8afe684SRob Clark size_t size = 0; 725c8afe684SRob Clark 726c8afe684SRob Clark list_for_each_entry(msm_obj, list, mm_list) { 727c8afe684SRob Clark struct drm_gem_object *obj = &msm_obj->base; 728c8afe684SRob Clark seq_printf(m, " "); 729c8afe684SRob Clark msm_gem_describe(obj, m); 730c8afe684SRob Clark count++; 731c8afe684SRob Clark size += obj->size; 732c8afe684SRob Clark } 733c8afe684SRob Clark 734c8afe684SRob Clark seq_printf(m, "Total %d objects, %zu bytes\n", count, size); 735c8afe684SRob Clark } 736c8afe684SRob Clark #endif 737c8afe684SRob Clark 738c8afe684SRob Clark void msm_gem_free_object(struct drm_gem_object *obj) 739c8afe684SRob Clark { 740c8afe684SRob Clark struct drm_device *dev = obj->dev; 741c8afe684SRob Clark struct msm_gem_object *msm_obj = to_msm_bo(obj); 742c8afe684SRob Clark 743c8afe684SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 744c8afe684SRob Clark 7457198e6b0SRob Clark /* object should not be on active list: */ 7467198e6b0SRob Clark WARN_ON(is_active(msm_obj)); 7477198e6b0SRob Clark 748c8afe684SRob Clark list_del(&msm_obj->mm_list); 749c8afe684SRob Clark 7504fe5f65eSRob Clark put_iova(obj); 751c8afe684SRob Clark 75205b84911SRob Clark if (obj->import_attach) { 75305b84911SRob Clark if (msm_obj->vaddr) 75405b84911SRob Clark dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); 75505b84911SRob Clark 75605b84911SRob Clark /* Don't drop the pages for imported dmabuf, as they are not 75705b84911SRob Clark * ours, just free the array we allocated: 75805b84911SRob Clark */ 75905b84911SRob Clark if (msm_obj->pages) 7602098105eSMichal Hocko kvfree(msm_obj->pages); 76105b84911SRob Clark 762f28730c8Sjilai wang drm_prime_gem_destroy(obj, msm_obj->sgt); 76305b84911SRob Clark } else { 764e1e9db2cSRob Clark msm_gem_vunmap(obj); 765c8afe684SRob Clark put_pages(obj); 76605b84911SRob Clark } 767c8afe684SRob Clark 7687198e6b0SRob Clark if (msm_obj->resv == &msm_obj->_resv) 7697198e6b0SRob Clark reservation_object_fini(msm_obj->resv); 7707198e6b0SRob Clark 771c8afe684SRob Clark drm_gem_object_release(obj); 772c8afe684SRob Clark 773c8afe684SRob Clark kfree(msm_obj); 774c8afe684SRob Clark } 775c8afe684SRob Clark 776c8afe684SRob Clark /* convenience method to construct a GEM buffer object, and userspace handle */ 777c8afe684SRob Clark int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, 778c8afe684SRob Clark uint32_t size, uint32_t flags, uint32_t *handle) 779c8afe684SRob Clark { 780c8afe684SRob Clark struct drm_gem_object *obj; 781c8afe684SRob Clark int ret; 782c8afe684SRob Clark 783c8afe684SRob Clark ret = mutex_lock_interruptible(&dev->struct_mutex); 784c8afe684SRob Clark if (ret) 785c8afe684SRob Clark return ret; 786c8afe684SRob Clark 787c8afe684SRob Clark obj = msm_gem_new(dev, size, flags); 788c8afe684SRob Clark 789c8afe684SRob Clark mutex_unlock(&dev->struct_mutex); 790c8afe684SRob Clark 791c8afe684SRob Clark if (IS_ERR(obj)) 792c8afe684SRob Clark return PTR_ERR(obj); 793c8afe684SRob Clark 794c8afe684SRob Clark ret = drm_gem_handle_create(file, obj, handle); 795c8afe684SRob Clark 796c8afe684SRob Clark /* drop reference from allocate - handle holds it now */ 797c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 798c8afe684SRob Clark 799c8afe684SRob Clark return ret; 800c8afe684SRob Clark } 801c8afe684SRob Clark 80205b84911SRob Clark static int msm_gem_new_impl(struct drm_device *dev, 80305b84911SRob Clark uint32_t size, uint32_t flags, 80479f0e202SRob Clark struct reservation_object *resv, 80505b84911SRob Clark struct drm_gem_object **obj) 806c8afe684SRob Clark { 807c8afe684SRob Clark struct msm_drm_private *priv = dev->dev_private; 808c8afe684SRob Clark struct msm_gem_object *msm_obj; 809c8afe684SRob Clark 81090dd57deSJordan Crouse WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 81190dd57deSJordan Crouse 812c8afe684SRob Clark switch (flags & MSM_BO_CACHE_MASK) { 813c8afe684SRob Clark case MSM_BO_UNCACHED: 814c8afe684SRob Clark case MSM_BO_CACHED: 815c8afe684SRob Clark case MSM_BO_WC: 816c8afe684SRob Clark break; 817c8afe684SRob Clark default: 818c8afe684SRob Clark dev_err(dev->dev, "invalid cache flag: %x\n", 819c8afe684SRob Clark (flags & MSM_BO_CACHE_MASK)); 82005b84911SRob Clark return -EINVAL; 821c8afe684SRob Clark } 822c8afe684SRob Clark 823667ce33eSRob Clark msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); 82405b84911SRob Clark if (!msm_obj) 82505b84911SRob Clark return -ENOMEM; 826c8afe684SRob Clark 827c8afe684SRob Clark msm_obj->flags = flags; 8284cd33c48SRob Clark msm_obj->madv = MSM_MADV_WILLNEED; 829c8afe684SRob Clark 83079f0e202SRob Clark if (resv) { 83179f0e202SRob Clark msm_obj->resv = resv; 83279f0e202SRob Clark } else { 8337198e6b0SRob Clark msm_obj->resv = &msm_obj->_resv; 8347198e6b0SRob Clark reservation_object_init(msm_obj->resv); 83579f0e202SRob Clark } 836c8afe684SRob Clark 8377198e6b0SRob Clark INIT_LIST_HEAD(&msm_obj->submit_entry); 8384b85f7f5SRob Clark INIT_LIST_HEAD(&msm_obj->vmas); 8394b85f7f5SRob Clark 840c8afe684SRob Clark list_add_tail(&msm_obj->mm_list, &priv->inactive_list); 841c8afe684SRob Clark 84205b84911SRob Clark *obj = &msm_obj->base; 84305b84911SRob Clark 84405b84911SRob Clark return 0; 84505b84911SRob Clark } 84605b84911SRob Clark 84705b84911SRob Clark struct drm_gem_object *msm_gem_new(struct drm_device *dev, 84805b84911SRob Clark uint32_t size, uint32_t flags) 84905b84911SRob Clark { 850f4839bd5SRob Clark struct msm_drm_private *priv = dev->dev_private; 851871d812aSRob Clark struct drm_gem_object *obj = NULL; 852f4839bd5SRob Clark bool use_vram = false; 85305b84911SRob Clark int ret; 85405b84911SRob Clark 85505b84911SRob Clark WARN_ON(!mutex_is_locked(&dev->struct_mutex)); 85605b84911SRob Clark 85705b84911SRob Clark size = PAGE_ALIGN(size); 85805b84911SRob Clark 859f4839bd5SRob Clark if (!iommu_present(&platform_bus_type)) 860f4839bd5SRob Clark use_vram = true; 861f4839bd5SRob Clark else if ((flags & MSM_BO_STOLEN) && priv->vram.size) 862f4839bd5SRob Clark use_vram = true; 863f4839bd5SRob Clark 864f4839bd5SRob Clark if (WARN_ON(use_vram && !priv->vram.size)) 865f4839bd5SRob Clark return ERR_PTR(-EINVAL); 866f4839bd5SRob Clark 8671a5dff5dSJordan Crouse /* Disallow zero sized objects as they make the underlying 8681a5dff5dSJordan Crouse * infrastructure grumpy 8691a5dff5dSJordan Crouse */ 8701a5dff5dSJordan Crouse if (size == 0) 8711a5dff5dSJordan Crouse return ERR_PTR(-EINVAL); 8721a5dff5dSJordan Crouse 87379f0e202SRob Clark ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); 87405b84911SRob Clark if (ret) 87505b84911SRob Clark goto fail; 87605b84911SRob Clark 877f4839bd5SRob Clark if (use_vram) { 8784b85f7f5SRob Clark struct msm_gem_vma *vma; 879f4839bd5SRob Clark struct page **pages; 880f4839bd5SRob Clark 8814b85f7f5SRob Clark vma = add_vma(obj, NULL); 8824b85f7f5SRob Clark if (IS_ERR(vma)) { 8834b85f7f5SRob Clark ret = PTR_ERR(vma); 8844b85f7f5SRob Clark goto fail; 8854b85f7f5SRob Clark } 8864b85f7f5SRob Clark 8874b85f7f5SRob Clark to_msm_bo(obj)->vram_node = &vma->node; 8884b85f7f5SRob Clark 889f4839bd5SRob Clark drm_gem_private_object_init(dev, obj, size); 890f4839bd5SRob Clark 891f4839bd5SRob Clark pages = get_pages(obj); 892f4839bd5SRob Clark if (IS_ERR(pages)) { 893f4839bd5SRob Clark ret = PTR_ERR(pages); 894f4839bd5SRob Clark goto fail; 895f4839bd5SRob Clark } 8964b85f7f5SRob Clark 8974b85f7f5SRob Clark vma->iova = physaddr(obj); 898f4839bd5SRob Clark } else { 89905b84911SRob Clark ret = drm_gem_object_init(dev, obj, size); 90005b84911SRob Clark if (ret) 90105b84911SRob Clark goto fail; 902871d812aSRob Clark } 90305b84911SRob Clark 90405b84911SRob Clark return obj; 90505b84911SRob Clark 90605b84911SRob Clark fail: 9079999f105SRob Clark drm_gem_object_unreference(obj); 90805b84911SRob Clark return ERR_PTR(ret); 90905b84911SRob Clark } 91005b84911SRob Clark 91105b84911SRob Clark struct drm_gem_object *msm_gem_import(struct drm_device *dev, 91279f0e202SRob Clark struct dma_buf *dmabuf, struct sg_table *sgt) 91305b84911SRob Clark { 91405b84911SRob Clark struct msm_gem_object *msm_obj; 91505b84911SRob Clark struct drm_gem_object *obj; 91679f0e202SRob Clark uint32_t size; 91705b84911SRob Clark int ret, npages; 91805b84911SRob Clark 919871d812aSRob Clark /* if we don't have IOMMU, don't bother pretending we can import: */ 920871d812aSRob Clark if (!iommu_present(&platform_bus_type)) { 921871d812aSRob Clark dev_err(dev->dev, "cannot import without IOMMU\n"); 922871d812aSRob Clark return ERR_PTR(-EINVAL); 923871d812aSRob Clark } 924871d812aSRob Clark 92579f0e202SRob Clark size = PAGE_ALIGN(dmabuf->size); 92605b84911SRob Clark 92790dd57deSJordan Crouse /* Take mutex so we can modify the inactive list in msm_gem_new_impl */ 92890dd57deSJordan Crouse mutex_lock(&dev->struct_mutex); 92979f0e202SRob Clark ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj); 93090dd57deSJordan Crouse mutex_unlock(&dev->struct_mutex); 93190dd57deSJordan Crouse 93205b84911SRob Clark if (ret) 93305b84911SRob Clark goto fail; 93405b84911SRob Clark 93505b84911SRob Clark drm_gem_private_object_init(dev, obj, size); 93605b84911SRob Clark 93705b84911SRob Clark npages = size / PAGE_SIZE; 93805b84911SRob Clark 93905b84911SRob Clark msm_obj = to_msm_bo(obj); 94005b84911SRob Clark msm_obj->sgt = sgt; 9412098105eSMichal Hocko msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 94205b84911SRob Clark if (!msm_obj->pages) { 94305b84911SRob Clark ret = -ENOMEM; 94405b84911SRob Clark goto fail; 94505b84911SRob Clark } 94605b84911SRob Clark 94705b84911SRob Clark ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); 94805b84911SRob Clark if (ret) 94905b84911SRob Clark goto fail; 95005b84911SRob Clark 951c8afe684SRob Clark return obj; 952c8afe684SRob Clark 953c8afe684SRob Clark fail: 954c8afe684SRob Clark drm_gem_object_unreference_unlocked(obj); 955c8afe684SRob Clark return ERR_PTR(ret); 956c8afe684SRob Clark } 957