/* * Copyright (C) 2013 Red Hat * Author: Rob Clark <robdclark@gmail.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/spinlock.h> #include <linux/shmem_fs.h> #include <linux/dma-buf.h> #include <linux/pfn_t.h> #include "msm_drv.h" #include "msm_fence.h" #include "msm_gem.h" #include "msm_gpu.h" #include "msm_mmu.h" static void msm_gem_vunmap_locked(struct drm_gem_object *obj); static dma_addr_t physaddr(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_drm_private *priv = obj->dev->dev_private; return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + priv->vram.paddr; } static bool use_pages(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); return !msm_obj->vram_node; } /* allocate pages from VRAM carveout, used when no IOMMU: */ static struct page **get_pages_vram(struct drm_gem_object *obj, int npages) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_drm_private *priv = obj->dev->dev_private; dma_addr_t paddr; struct page **p; int ret, i; p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); if (!p) return ERR_PTR(-ENOMEM); spin_lock(&priv->vram.lock); ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages); spin_unlock(&priv->vram.lock); if (ret) { kvfree(p); return ERR_PTR(ret); } paddr = physaddr(obj); for (i = 0; i < npages; i++) { p[i] = phys_to_page(paddr); paddr += PAGE_SIZE; } return p; } static struct page **get_pages(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); if (!msm_obj->pages) { struct drm_device *dev = obj->dev; struct page **p; int npages = obj->size >> PAGE_SHIFT; if (use_pages(obj)) p = drm_gem_get_pages(obj); else p = get_pages_vram(obj, npages); if (IS_ERR(p)) { dev_err(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); return p; } msm_obj->pages = p; msm_obj->sgt = drm_prime_pages_to_sg(p, npages); if (IS_ERR(msm_obj->sgt)) { void *ptr = ERR_CAST(msm_obj->sgt); dev_err(dev->dev, "failed to allocate sgt\n"); msm_obj->sgt = NULL; return ptr; } /* For non-cached buffers, ensure the new pages are clean * because display controller, GPU, etc. are not coherent: */ if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) dma_map_sg(dev->dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } return msm_obj->pages; } static void put_pages_vram(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_drm_private *priv = obj->dev->dev_private; spin_lock(&priv->vram.lock); drm_mm_remove_node(msm_obj->vram_node); spin_unlock(&priv->vram.lock); kvfree(msm_obj->pages); } static void put_pages(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); if (msm_obj->pages) { if (msm_obj->sgt) { /* For non-cached buffers, ensure the new * pages are clean because display controller, * GPU, etc. are not coherent: */ if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); sg_free_table(msm_obj->sgt); kfree(msm_obj->sgt); } if (use_pages(obj)) drm_gem_put_pages(obj, msm_obj->pages, true, false); else put_pages_vram(obj); msm_obj->pages = NULL; } } struct page **msm_gem_get_pages(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct page **p; mutex_lock(&msm_obj->lock); if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { mutex_unlock(&msm_obj->lock); return ERR_PTR(-EBUSY); } p = get_pages(obj); mutex_unlock(&msm_obj->lock); return p; } void msm_gem_put_pages(struct drm_gem_object *obj) { /* when we start tracking the pin count, then do something here */ } int msm_gem_mmap_obj(struct drm_gem_object *obj, struct vm_area_struct *vma) { struct msm_gem_object *msm_obj = to_msm_bo(obj); vma->vm_flags &= ~VM_PFNMAP; vma->vm_flags |= VM_MIXEDMAP; if (msm_obj->flags & MSM_BO_WC) { vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); } else if (msm_obj->flags & MSM_BO_UNCACHED) { vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); } else { /* * Shunt off cached objs to shmem file so they have their own * address_space (so unmap_mapping_range does what we want, * in particular in the case of mmap'd dmabufs) */ fput(vma->vm_file); get_file(obj->filp); vma->vm_pgoff = 0; vma->vm_file = obj->filp; vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); } return 0; } int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) { int ret; ret = drm_gem_mmap(filp, vma); if (ret) { DBG("mmap failed: %d", ret); return ret; } return msm_gem_mmap_obj(vma->vm_private_data, vma); } int msm_gem_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct drm_gem_object *obj = vma->vm_private_data; struct msm_gem_object *msm_obj = to_msm_bo(obj); struct page **pages; unsigned long pfn; pgoff_t pgoff; int ret; /* * vm_ops.open/drm_gem_mmap_obj and close get and put * a reference on obj. So, we dont need to hold one here. */ ret = mutex_lock_interruptible(&msm_obj->lock); if (ret) goto out; if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { mutex_unlock(&msm_obj->lock); return VM_FAULT_SIGBUS; } /* make sure we have pages attached now */ pages = get_pages(obj); if (IS_ERR(pages)) { ret = PTR_ERR(pages); goto out_unlock; } /* We don't use vmf->pgoff since that has the fake offset: */ pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; pfn = page_to_pfn(pages[pgoff]); VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, pfn, pfn << PAGE_SHIFT); ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); out_unlock: mutex_unlock(&msm_obj->lock); out: switch (ret) { case -EAGAIN: case 0: case -ERESTARTSYS: case -EINTR: case -EBUSY: /* * EBUSY is ok: this just means that another thread * already did the job. */ return VM_FAULT_NOPAGE; case -ENOMEM: return VM_FAULT_OOM; default: return VM_FAULT_SIGBUS; } } /** get mmap offset */ static uint64_t mmap_offset(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct msm_gem_object *msm_obj = to_msm_bo(obj); int ret; WARN_ON(!mutex_is_locked(&msm_obj->lock)); /* Make it mmapable */ ret = drm_gem_create_mmap_offset(obj); if (ret) { dev_err(dev->dev, "could not allocate mmap offset\n"); return 0; } return drm_vma_node_offset_addr(&obj->vma_node); } uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) { uint64_t offset; struct msm_gem_object *msm_obj = to_msm_bo(obj); mutex_lock(&msm_obj->lock); offset = mmap_offset(obj); mutex_unlock(&msm_obj->lock); return offset; } static struct msm_gem_vma *add_vma(struct drm_gem_object *obj, struct msm_gem_address_space *aspace) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_gem_vma *vma; WARN_ON(!mutex_is_locked(&msm_obj->lock)); vma = kzalloc(sizeof(*vma), GFP_KERNEL); if (!vma) return ERR_PTR(-ENOMEM); vma->aspace = aspace; list_add_tail(&vma->list, &msm_obj->vmas); return vma; } static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj, struct msm_gem_address_space *aspace) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_gem_vma *vma; WARN_ON(!mutex_is_locked(&msm_obj->lock)); list_for_each_entry(vma, &msm_obj->vmas, list) { if (vma->aspace == aspace) return vma; } return NULL; } static void del_vma(struct msm_gem_vma *vma) { if (!vma) return; list_del(&vma->list); kfree(vma); } /* Called with msm_obj->lock locked */ static void put_iova(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_gem_vma *vma, *tmp; WARN_ON(!mutex_is_locked(&msm_obj->lock)); list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) { msm_gem_unmap_vma(vma->aspace, vma, msm_obj->sgt); del_vma(vma); } } /* get iova, taking a reference. Should have a matching put */ int msm_gem_get_iova(struct drm_gem_object *obj, struct msm_gem_address_space *aspace, uint64_t *iova) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_gem_vma *vma; int ret = 0; mutex_lock(&msm_obj->lock); if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) { mutex_unlock(&msm_obj->lock); return -EBUSY; } vma = lookup_vma(obj, aspace); if (!vma) { struct page **pages; vma = add_vma(obj, aspace); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto unlock; } pages = get_pages(obj); if (IS_ERR(pages)) { ret = PTR_ERR(pages); goto fail; } ret = msm_gem_map_vma(aspace, vma, msm_obj->sgt, obj->size >> PAGE_SHIFT); if (ret) goto fail; } *iova = vma->iova; mutex_unlock(&msm_obj->lock); return 0; fail: del_vma(vma); unlock: mutex_unlock(&msm_obj->lock); return ret; } /* get iova without taking a reference, used in places where you have * already done a 'msm_gem_get_iova()'. */ uint64_t msm_gem_iova(struct drm_gem_object *obj, struct msm_gem_address_space *aspace) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_gem_vma *vma; mutex_lock(&msm_obj->lock); vma = lookup_vma(obj, aspace); mutex_unlock(&msm_obj->lock); WARN_ON(!vma); return vma ? vma->iova : 0; } void msm_gem_put_iova(struct drm_gem_object *obj, struct msm_gem_address_space *aspace) { // XXX TODO .. // NOTE: probably don't need a _locked() version.. we wouldn't // normally unmap here, but instead just mark that it could be // unmapped (if the iova refcnt drops to zero), but then later // if another _get_iova_locked() fails we can start unmapping // things that are no longer needed.. } int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, struct drm_mode_create_dumb *args) { args->pitch = align_pitch(args->width, args->bpp); args->size = PAGE_ALIGN(args->pitch * args->height); return msm_gem_new_handle(dev, file, args->size, MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); } int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, uint32_t handle, uint64_t *offset) { struct drm_gem_object *obj; int ret = 0; /* GEM does all our handle to object mapping */ obj = drm_gem_object_lookup(file, handle); if (obj == NULL) { ret = -ENOENT; goto fail; } *offset = msm_gem_mmap_offset(obj); drm_gem_object_put_unlocked(obj); fail: return ret; } static void *get_vaddr(struct drm_gem_object *obj, unsigned madv) { struct msm_gem_object *msm_obj = to_msm_bo(obj); int ret = 0; mutex_lock(&msm_obj->lock); if (WARN_ON(msm_obj->madv > madv)) { dev_err(obj->dev->dev, "Invalid madv state: %u vs %u\n", msm_obj->madv, madv); mutex_unlock(&msm_obj->lock); return ERR_PTR(-EBUSY); } /* increment vmap_count *before* vmap() call, so shrinker can * check vmap_count (is_vunmapable()) outside of msm_obj->lock. * This guarantees that we won't try to msm_gem_vunmap() this * same object from within the vmap() call (while we already * hold msm_obj->lock) */ msm_obj->vmap_count++; if (!msm_obj->vaddr) { struct page **pages = get_pages(obj); if (IS_ERR(pages)) { ret = PTR_ERR(pages); goto fail; } msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, VM_MAP, pgprot_writecombine(PAGE_KERNEL)); if (msm_obj->vaddr == NULL) { ret = -ENOMEM; goto fail; } } mutex_unlock(&msm_obj->lock); return msm_obj->vaddr; fail: msm_obj->vmap_count--; mutex_unlock(&msm_obj->lock); return ERR_PTR(ret); } void *msm_gem_get_vaddr(struct drm_gem_object *obj) { return get_vaddr(obj, MSM_MADV_WILLNEED); } /* * Don't use this! It is for the very special case of dumping * submits from GPU hangs or faults, were the bo may already * be MSM_MADV_DONTNEED, but we know the buffer is still on the * active list. */ void *msm_gem_get_vaddr_active(struct drm_gem_object *obj) { return get_vaddr(obj, __MSM_MADV_PURGED); } void msm_gem_put_vaddr(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); mutex_lock(&msm_obj->lock); WARN_ON(msm_obj->vmap_count < 1); msm_obj->vmap_count--; mutex_unlock(&msm_obj->lock); } /* Update madvise status, returns true if not purged, else * false or -errno. */ int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) { struct msm_gem_object *msm_obj = to_msm_bo(obj); mutex_lock(&msm_obj->lock); WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); if (msm_obj->madv != __MSM_MADV_PURGED) msm_obj->madv = madv; madv = msm_obj->madv; mutex_unlock(&msm_obj->lock); return (madv != __MSM_MADV_PURGED); } void msm_gem_purge(struct drm_gem_object *obj, enum msm_gem_lock subclass) { struct drm_device *dev = obj->dev; struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&dev->struct_mutex)); WARN_ON(!is_purgeable(msm_obj)); WARN_ON(obj->import_attach); mutex_lock_nested(&msm_obj->lock, subclass); put_iova(obj); msm_gem_vunmap_locked(obj); put_pages(obj); msm_obj->madv = __MSM_MADV_PURGED; drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); drm_gem_free_mmap_offset(obj); /* Our goal here is to return as much of the memory as * is possible back to the system as we are called from OOM. * To do this we must instruct the shmfs to drop all of its * backing pages, *now*. */ shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, 0, (loff_t)-1); mutex_unlock(&msm_obj->lock); } static void msm_gem_vunmap_locked(struct drm_gem_object *obj) { struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&msm_obj->lock)); if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj))) return; vunmap(msm_obj->vaddr); msm_obj->vaddr = NULL; } void msm_gem_vunmap(struct drm_gem_object *obj, enum msm_gem_lock subclass) { struct msm_gem_object *msm_obj = to_msm_bo(obj); mutex_lock_nested(&msm_obj->lock, subclass); msm_gem_vunmap_locked(obj); mutex_unlock(&msm_obj->lock); } /* must be called before _move_to_active().. */ int msm_gem_sync_object(struct drm_gem_object *obj, struct msm_fence_context *fctx, bool exclusive) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct reservation_object_list *fobj; struct dma_fence *fence; int i, ret; fobj = reservation_object_get_list(msm_obj->resv); if (!fobj || (fobj->shared_count == 0)) { fence = reservation_object_get_excl(msm_obj->resv); /* don't need to wait on our own fences, since ring is fifo */ if (fence && (fence->context != fctx->context)) { ret = dma_fence_wait(fence, true); if (ret) return ret; } } if (!exclusive || !fobj) return 0; for (i = 0; i < fobj->shared_count; i++) { fence = rcu_dereference_protected(fobj->shared[i], reservation_object_held(msm_obj->resv)); if (fence->context != fctx->context) { ret = dma_fence_wait(fence, true); if (ret) return ret; } } return 0; } void msm_gem_move_to_active(struct drm_gem_object *obj, struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence) { struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); msm_obj->gpu = gpu; if (exclusive) reservation_object_add_excl_fence(msm_obj->resv, fence); else reservation_object_add_shared_fence(msm_obj->resv, fence); list_del_init(&msm_obj->mm_list); list_add_tail(&msm_obj->mm_list, &gpu->active_list); } void msm_gem_move_to_inactive(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct msm_drm_private *priv = dev->dev_private; struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&dev->struct_mutex)); msm_obj->gpu = NULL; list_del_init(&msm_obj->mm_list); list_add_tail(&msm_obj->mm_list, &priv->inactive_list); } int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) { struct msm_gem_object *msm_obj = to_msm_bo(obj); bool write = !!(op & MSM_PREP_WRITE); unsigned long remain = op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); long ret; ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, true, remain); if (ret == 0) return remain == 0 ? -EBUSY : -ETIMEDOUT; else if (ret < 0) return ret; /* TODO cache maintenance */ return 0; } int msm_gem_cpu_fini(struct drm_gem_object *obj) { /* TODO cache maintenance */ return 0; } #ifdef CONFIG_DEBUG_FS static void describe_fence(struct dma_fence *fence, const char *type, struct seq_file *m) { if (!dma_fence_is_signaled(fence)) seq_printf(m, "\t%9s: %s %s seq %u\n", type, fence->ops->get_driver_name(fence), fence->ops->get_timeline_name(fence), fence->seqno); } void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct reservation_object *robj = msm_obj->resv; struct reservation_object_list *fobj; struct dma_fence *fence; struct msm_gem_vma *vma; uint64_t off = drm_vma_node_start(&obj->vma_node); const char *madv; mutex_lock(&msm_obj->lock); switch (msm_obj->madv) { case __MSM_MADV_PURGED: madv = " purged"; break; case MSM_MADV_DONTNEED: madv = " purgeable"; break; case MSM_MADV_WILLNEED: default: madv = ""; break; } seq_printf(m, "%08x: %c %2d (%2d) %08llx %p\t", msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', obj->name, kref_read(&obj->refcount), off, msm_obj->vaddr); /* FIXME: we need to print the address space here too */ list_for_each_entry(vma, &msm_obj->vmas, list) seq_printf(m, " %08llx", vma->iova); seq_printf(m, " %zu%s\n", obj->size, madv); rcu_read_lock(); fobj = rcu_dereference(robj->fence); if (fobj) { unsigned int i, shared_count = fobj->shared_count; for (i = 0; i < shared_count; i++) { fence = rcu_dereference(fobj->shared[i]); describe_fence(fence, "Shared", m); } } fence = rcu_dereference(robj->fence_excl); if (fence) describe_fence(fence, "Exclusive", m); rcu_read_unlock(); mutex_unlock(&msm_obj->lock); } void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) { struct msm_gem_object *msm_obj; int count = 0; size_t size = 0; list_for_each_entry(msm_obj, list, mm_list) { struct drm_gem_object *obj = &msm_obj->base; seq_printf(m, " "); msm_gem_describe(obj, m); count++; size += obj->size; } seq_printf(m, "Total %d objects, %zu bytes\n", count, size); } #endif /* don't call directly! Use drm_gem_object_put() and friends */ void msm_gem_free_object(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct msm_gem_object *msm_obj = to_msm_bo(obj); WARN_ON(!mutex_is_locked(&dev->struct_mutex)); /* object should not be on active list: */ WARN_ON(is_active(msm_obj)); list_del(&msm_obj->mm_list); mutex_lock(&msm_obj->lock); put_iova(obj); if (obj->import_attach) { if (msm_obj->vaddr) dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); /* Don't drop the pages for imported dmabuf, as they are not * ours, just free the array we allocated: */ if (msm_obj->pages) kvfree(msm_obj->pages); drm_prime_gem_destroy(obj, msm_obj->sgt); } else { msm_gem_vunmap_locked(obj); put_pages(obj); } if (msm_obj->resv == &msm_obj->_resv) reservation_object_fini(msm_obj->resv); drm_gem_object_release(obj); mutex_unlock(&msm_obj->lock); kfree(msm_obj); } /* convenience method to construct a GEM buffer object, and userspace handle */ int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, uint32_t size, uint32_t flags, uint32_t *handle) { struct drm_gem_object *obj; int ret; obj = msm_gem_new(dev, size, flags); if (IS_ERR(obj)) return PTR_ERR(obj); ret = drm_gem_handle_create(file, obj, handle); /* drop reference from allocate - handle holds it now */ drm_gem_object_put_unlocked(obj); return ret; } static int msm_gem_new_impl(struct drm_device *dev, uint32_t size, uint32_t flags, struct reservation_object *resv, struct drm_gem_object **obj, bool struct_mutex_locked) { struct msm_drm_private *priv = dev->dev_private; struct msm_gem_object *msm_obj; switch (flags & MSM_BO_CACHE_MASK) { case MSM_BO_UNCACHED: case MSM_BO_CACHED: case MSM_BO_WC: break; default: dev_err(dev->dev, "invalid cache flag: %x\n", (flags & MSM_BO_CACHE_MASK)); return -EINVAL; } msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); if (!msm_obj) return -ENOMEM; mutex_init(&msm_obj->lock); msm_obj->flags = flags; msm_obj->madv = MSM_MADV_WILLNEED; if (resv) { msm_obj->resv = resv; } else { msm_obj->resv = &msm_obj->_resv; reservation_object_init(msm_obj->resv); } INIT_LIST_HEAD(&msm_obj->submit_entry); INIT_LIST_HEAD(&msm_obj->vmas); if (struct_mutex_locked) { WARN_ON(!mutex_is_locked(&dev->struct_mutex)); list_add_tail(&msm_obj->mm_list, &priv->inactive_list); } else { mutex_lock(&dev->struct_mutex); list_add_tail(&msm_obj->mm_list, &priv->inactive_list); mutex_unlock(&dev->struct_mutex); } *obj = &msm_obj->base; return 0; } static struct drm_gem_object *_msm_gem_new(struct drm_device *dev, uint32_t size, uint32_t flags, bool struct_mutex_locked) { struct msm_drm_private *priv = dev->dev_private; struct drm_gem_object *obj = NULL; bool use_vram = false; int ret; size = PAGE_ALIGN(size); if (!iommu_present(&platform_bus_type)) use_vram = true; else if ((flags & MSM_BO_STOLEN) && priv->vram.size) use_vram = true; if (WARN_ON(use_vram && !priv->vram.size)) return ERR_PTR(-EINVAL); /* Disallow zero sized objects as they make the underlying * infrastructure grumpy */ if (size == 0) return ERR_PTR(-EINVAL); ret = msm_gem_new_impl(dev, size, flags, NULL, &obj, struct_mutex_locked); if (ret) goto fail; if (use_vram) { struct msm_gem_vma *vma; struct page **pages; struct msm_gem_object *msm_obj = to_msm_bo(obj); mutex_lock(&msm_obj->lock); vma = add_vma(obj, NULL); mutex_unlock(&msm_obj->lock); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto fail; } to_msm_bo(obj)->vram_node = &vma->node; drm_gem_private_object_init(dev, obj, size); pages = get_pages(obj); if (IS_ERR(pages)) { ret = PTR_ERR(pages); goto fail; } vma->iova = physaddr(obj); } else { ret = drm_gem_object_init(dev, obj, size); if (ret) goto fail; } return obj; fail: drm_gem_object_put_unlocked(obj); return ERR_PTR(ret); } struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev, uint32_t size, uint32_t flags) { return _msm_gem_new(dev, size, flags, true); } struct drm_gem_object *msm_gem_new(struct drm_device *dev, uint32_t size, uint32_t flags) { return _msm_gem_new(dev, size, flags, false); } struct drm_gem_object *msm_gem_import(struct drm_device *dev, struct dma_buf *dmabuf, struct sg_table *sgt) { struct msm_gem_object *msm_obj; struct drm_gem_object *obj; uint32_t size; int ret, npages; /* if we don't have IOMMU, don't bother pretending we can import: */ if (!iommu_present(&platform_bus_type)) { dev_err(dev->dev, "cannot import without IOMMU\n"); return ERR_PTR(-EINVAL); } size = PAGE_ALIGN(dmabuf->size); ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj, false); if (ret) goto fail; drm_gem_private_object_init(dev, obj, size); npages = size / PAGE_SIZE; msm_obj = to_msm_bo(obj); mutex_lock(&msm_obj->lock); msm_obj->sgt = sgt; msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); if (!msm_obj->pages) { mutex_unlock(&msm_obj->lock); ret = -ENOMEM; goto fail; } ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); if (ret) { mutex_unlock(&msm_obj->lock); goto fail; } mutex_unlock(&msm_obj->lock); return obj; fail: drm_gem_object_put_unlocked(obj); return ERR_PTR(ret); } static void *_msm_gem_kernel_new(struct drm_device *dev, uint32_t size, uint32_t flags, struct msm_gem_address_space *aspace, struct drm_gem_object **bo, uint64_t *iova, bool locked) { void *vaddr; struct drm_gem_object *obj = _msm_gem_new(dev, size, flags, locked); int ret; if (IS_ERR(obj)) return ERR_CAST(obj); if (iova) { ret = msm_gem_get_iova(obj, aspace, iova); if (ret) { drm_gem_object_put(obj); return ERR_PTR(ret); } } vaddr = msm_gem_get_vaddr(obj); if (IS_ERR(vaddr)) { msm_gem_put_iova(obj, aspace); drm_gem_object_put(obj); return ERR_CAST(vaddr); } if (bo) *bo = obj; return vaddr; } void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size, uint32_t flags, struct msm_gem_address_space *aspace, struct drm_gem_object **bo, uint64_t *iova) { return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, false); } void *msm_gem_kernel_new_locked(struct drm_device *dev, uint32_t size, uint32_t flags, struct msm_gem_address_space *aspace, struct drm_gem_object **bo, uint64_t *iova) { return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, true); }