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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 | // SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2013 Red Hat * Author: Rob Clark <robdclark@gmail.com> */ #include <linux/spinlock.h> #include <linux/shmem_fs.h> #include <linux/dma-buf.h> #include <linux/pfn_t.h> #include <drm/drm_prime.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; } /* * Cache sync.. this is a bit over-complicated, to fit dma-mapping * API. Really GPU cache is out of scope here (handled on cmdstream) * and all we need to do is invalidate newly allocated pages before * mapping to CPU as uncached/writecombine. * * On top of this, we have the added headache, that depending on * display generation, the display's iommu may be wired up to either * the toplevel drm device (mdss), or to the mdp sub-node, meaning * that here we either have dma-direct or iommu ops. * * Let this be a cautionary tail of abstraction gone wrong. */ static void sync_for_device(struct msm_gem_object *msm_obj) { struct device *dev = msm_obj->base.dev->dev; if (get_dma_ops(dev) && IS_ENABLED(CONFIG_ARM64)) { dma_sync_sg_for_device(dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } else { dma_map_sg(dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } } static void sync_for_cpu(struct msm_gem_object *msm_obj) { struct device *dev = msm_obj->base.dev->dev; if (get_dma_ops(dev) && IS_ENABLED(CONFIG_ARM64)) { dma_sync_sg_for_cpu(dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } else { dma_unmap_sg(dev, msm_obj->sgt->sgl, msm_obj->sgt->nents, DMA_BIDIRECTIONAL); } } /* 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)) { DRM_DEV_ERROR(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); DRM_DEV_ERROR(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)) sync_for_device(msm_obj); } 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)) sync_for_cpu(msm_obj); 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); } vm_fault_t 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 err; vm_fault_t 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. */ err = mutex_lock_interruptible(&msm_obj->lock); if (err) { ret = VM_FAULT_NOPAGE; 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 = vmf_error(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 = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); out_unlock: mutex_unlock(&msm_obj->lock); out: return ret; } /** 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) { DRM_DEV_ERROR(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) { if (vma->aspace) { msm_gem_purge_vma(vma->aspace, vma); msm_gem_close_vma(vma->aspace, vma); } del_vma(vma); } } static int msm_gem_get_iova_locked(struct drm_gem_object *obj, struct msm_gem_address_space *aspace, uint64_t *iova, u64 range_start, u64 range_end) { struct msm_gem_object *msm_obj = to_msm_bo(obj); struct msm_gem_vma *vma; int ret = 0; WARN_ON(!mutex_is_locked(&msm_obj->lock)); vma = lookup_vma(obj, aspace); if (!vma) { vma = add_vma(obj, aspace); if (IS_ERR(vma)) return PTR_ERR(vma); ret = msm_gem_init_vma(aspace, vma, obj->size >> PAGE_SHIFT, range_start, range_end); if (ret) { del_vma(vma); return ret; } } *iova = vma->iova; return 0; } static int msm_gem_pin_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; struct page **pages; int prot = IOMMU_READ; if (!(msm_obj->flags & MSM_BO_GPU_READONLY)) prot |= IOMMU_WRITE; if (msm_obj->flags & MSM_BO_MAP_PRIV) prot |= IOMMU_PRIV; WARN_ON(!mutex_is_locked(&msm_obj->lock)); if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) return -EBUSY; vma = lookup_vma(obj, aspace); if (WARN_ON(!vma)) return -EINVAL; pages = get_pages(obj); if (IS_ERR(pages)) return PTR_ERR(pages); return msm_gem_map_vma(aspace, vma, prot, msm_obj->sgt, obj->size >> PAGE_SHIFT); } /* * get iova and pin it. Should have a matching put * limits iova to specified range (in pages) */ int msm_gem_get_and_pin_iova_range(struct drm_gem_object *obj, struct msm_gem_address_space *aspace, uint64_t *iova, u64 range_start, u64 range_end) { struct msm_gem_object *msm_obj = to_msm_bo(obj); u64 local; int ret; mutex_lock(&msm_obj->lock); ret = msm_gem_get_iova_locked(obj, aspace, &local, range_start, range_end); if (!ret) ret = msm_gem_pin_iova(obj, aspace); if (!ret) *iova = local; mutex_unlock(&msm_obj->lock); return ret; } /* get iova and pin it. Should have a matching put */ int msm_gem_get_and_pin_iova(struct drm_gem_object *obj, struct msm_gem_address_space *aspace, uint64_t *iova) { return msm_gem_get_and_pin_iova_range(obj, aspace, iova, 0, U64_MAX); } /* * Get an iova but don't pin it. Doesn't need a put because iovas are currently * valid for the life of the object */ 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); int ret; mutex_lock(&msm_obj->lock); ret = msm_gem_get_iova_locked(obj, aspace, iova, 0, U64_MAX); 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_and_pin_iova' or '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; } /* * Unpin a iova by updating the reference counts. The memory isn't actually * purged until something else (shrinker, mm_notifier, destroy, etc) decides * to get rid of it */ void msm_gem_unpin_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); if (!WARN_ON(!vma)) msm_gem_unmap_vma(aspace, vma); mutex_unlock(&msm_obj->lock); } 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, "dumb"); } 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)) { DRM_DEV_ERROR(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 dma_resv_list *fobj; struct dma_fence *fence; int i, ret; fobj = dma_resv_get_list(obj->resv); if (!fobj || (fobj->shared_count == 0)) { fence = dma_resv_get_excl(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], dma_resv_held(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) dma_resv_add_excl_fence(obj->resv, fence); else dma_resv_add_shared_fence(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) { bool write = !!(op & MSM_PREP_WRITE); unsigned long remain = op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout); long ret; ret = dma_resv_wait_timeout_rcu(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 %llu\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 dma_resv *robj = obj->resv; struct dma_resv_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", msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', obj->name, kref_read(&obj->refcount), off, msm_obj->vaddr); seq_printf(m, " %08zu %9s %-32s\n", obj->size, madv, msm_obj->name); if (!list_empty(&msm_obj->vmas)) { seq_puts(m, " vmas:"); list_for_each_entry(vma, &msm_obj->vmas, list) seq_printf(m, " [%s: %08llx,%s,inuse=%d]", vma->aspace != NULL ? vma->aspace->name : NULL, vma->iova, vma->mapped ? "mapped" : "unmapped", vma->inuse); seq_puts(m, "\n"); } 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; seq_puts(m, " flags id ref offset kaddr size madv name\n"); list_for_each_entry(msm_obj, list, mm_list) { struct drm_gem_object *obj = &msm_obj->base; seq_puts(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 msm_gem_object *msm_obj = to_msm_bo(obj); struct drm_device *dev = obj->dev; struct msm_drm_private *priv = dev->dev_private; if (llist_add(&msm_obj->freed, &priv->free_list)) queue_work(priv->wq, &priv->free_work); } static void free_object(struct msm_gem_object *msm_obj) { struct drm_gem_object *obj = &msm_obj->base; struct drm_device *dev = obj->dev; 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); } drm_gem_object_release(obj); mutex_unlock(&msm_obj->lock); kfree(msm_obj); } void msm_gem_free_work(struct work_struct *work) { struct msm_drm_private *priv = container_of(work, struct msm_drm_private, free_work); struct drm_device *dev = priv->dev; struct llist_node *freed; struct msm_gem_object *msm_obj, *next; while ((freed = llist_del_all(&priv->free_list))) { mutex_lock(&dev->struct_mutex); llist_for_each_entry_safe(msm_obj, next, freed, freed) free_object(msm_obj); mutex_unlock(&dev->struct_mutex); if (need_resched()) break; } } /* 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, char *name) { struct drm_gem_object *obj; int ret; obj = msm_gem_new(dev, size, flags); if (IS_ERR(obj)) return PTR_ERR(obj); if (name) msm_gem_object_set_name(obj, "%s", name); 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 drm_gem_object **obj) { 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: DRM_DEV_ERROR(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; INIT_LIST_HEAD(&msm_obj->submit_entry); INIT_LIST_HEAD(&msm_obj->vmas); *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 msm_gem_object *msm_obj; struct drm_gem_object *obj = NULL; bool use_vram = false; int ret; size = PAGE_ALIGN(size); if (!msm_use_mmu(dev)) use_vram = true; else if ((flags & (MSM_BO_STOLEN | MSM_BO_SCANOUT)) && 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, &obj); if (ret) goto fail; msm_obj = to_msm_bo(obj); if (use_vram) { struct msm_gem_vma *vma; struct page **pages; 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; /* * Our buffers are kept pinned, so allocating them from the * MOVABLE zone is a really bad idea, and conflicts with CMA. * See comments above new_inode() why this is required _and_ * expected if you're going to pin these pages. */ mapping_set_gfp_mask(obj->filp->f_mapping, GFP_HIGHUSER); } 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); } 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_drm_private *priv = dev->dev_private; 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 (!msm_use_mmu(dev)) { DRM_DEV_ERROR(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, &obj); 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); mutex_lock(&dev->struct_mutex); list_add_tail(&msm_obj->mm_list, &priv->inactive_list); mutex_unlock(&dev->struct_mutex); 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_and_pin_iova(obj, aspace, iova); if (ret) goto err; } vaddr = msm_gem_get_vaddr(obj); if (IS_ERR(vaddr)) { msm_gem_unpin_iova(obj, aspace); ret = PTR_ERR(vaddr); goto err; } if (bo) *bo = obj; return vaddr; err: if (locked) drm_gem_object_put(obj); else drm_gem_object_put_unlocked(obj); return ERR_PTR(ret); } 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); } void msm_gem_kernel_put(struct drm_gem_object *bo, struct msm_gem_address_space *aspace, bool locked) { if (IS_ERR_OR_NULL(bo)) return; msm_gem_put_vaddr(bo); msm_gem_unpin_iova(bo, aspace); if (locked) drm_gem_object_put(bo); else drm_gem_object_put_unlocked(bo); } void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...) { struct msm_gem_object *msm_obj = to_msm_bo(bo); va_list ap; if (!fmt) return; va_start(ap, fmt); vsnprintf(msm_obj->name, sizeof(msm_obj->name), fmt, ap); va_end(ap); } |