| /* |
| * 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 *get_dmabuf_ptr(struct drm_gem_object *obj) |
| { |
| return (obj && obj->import_attach) ? obj->import_attach->dmabuf : NULL; |
| } |
| |
| 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 = drm_malloc_ab(npages, sizeof(struct page *)); |
| if (!p) |
| return ERR_PTR(-ENOMEM); |
| |
| ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, |
| npages, 0, DRM_MM_SEARCH_DEFAULT); |
| if (ret) { |
| drm_free_large(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; |
| } |
| |
| /* called with dev->struct_mutex held */ |
| 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->sgt = drm_prime_pages_to_sg(p, npages); |
| if (IS_ERR(msm_obj->sgt)) { |
| dev_err(dev->dev, "failed to allocate sgt\n"); |
| return ERR_CAST(msm_obj->sgt); |
| } |
| |
| msm_obj->pages = p; |
| |
| /* 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(struct drm_gem_object *obj) |
| { |
| struct msm_gem_object *msm_obj = to_msm_bo(obj); |
| |
| if (msm_obj->pages) { |
| /* 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 { |
| drm_mm_remove_node(msm_obj->vram_node); |
| drm_free_large(msm_obj->pages); |
| } |
| |
| msm_obj->pages = NULL; |
| } |
| } |
| |
| struct page **msm_gem_get_pages(struct drm_gem_object *obj) |
| { |
| struct drm_device *dev = obj->dev; |
| struct page **p; |
| mutex_lock(&dev->struct_mutex); |
| p = get_pages(obj); |
| mutex_unlock(&dev->struct_mutex); |
| 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_area_struct *vma, struct vm_fault *vmf) |
| { |
| struct drm_gem_object *obj = vma->vm_private_data; |
| struct drm_device *dev = obj->dev; |
| struct msm_drm_private *priv = dev->dev_private; |
| struct page **pages; |
| unsigned long pfn; |
| pgoff_t pgoff; |
| int ret; |
| |
| /* This should only happen if userspace tries to pass a mmap'd |
| * but unfaulted gem bo vaddr into submit ioctl, triggering |
| * a page fault while struct_mutex is already held. This is |
| * not a valid use-case so just bail. |
| */ |
| if (priv->struct_mutex_task == current) |
| return VM_FAULT_SIGBUS; |
| |
| /* Make sure we don't parallel update on a fault, nor move or remove |
| * something from beneath our feet |
| */ |
| ret = mutex_lock_interruptible(&dev->struct_mutex); |
| if (ret) |
| goto out; |
| |
| /* 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 = ((unsigned long)vmf->virtual_address - |
| vma->vm_start) >> PAGE_SHIFT; |
| |
| pfn = page_to_pfn(pages[pgoff]); |
| |
| VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, |
| pfn, pfn << PAGE_SHIFT); |
| |
| ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, |
| __pfn_to_pfn_t(pfn, PFN_DEV)); |
| |
| out_unlock: |
| mutex_unlock(&dev->struct_mutex); |
| 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; |
| int ret; |
| |
| WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
| |
| /* 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; |
| mutex_lock(&obj->dev->struct_mutex); |
| offset = mmap_offset(obj); |
| mutex_unlock(&obj->dev->struct_mutex); |
| return offset; |
| } |
| |
| static void obj_remove_domain(struct msm_gem_vma *domain) |
| { |
| if (domain) { |
| list_del(&domain->list); |
| kfree(domain); |
| } |
| } |
| |
| static void |
| put_iova(struct drm_gem_object *obj) |
| { |
| struct drm_device *dev = obj->dev; |
| struct msm_gem_object *msm_obj = to_msm_bo(obj); |
| struct msm_gem_vma *domain, *tmp; |
| |
| WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
| |
| list_for_each_entry_safe(domain, tmp, &msm_obj->domains, list) { |
| if (iommu_present(&platform_bus_type)) { |
| msm_gem_unmap_vma(domain->aspace, domain, |
| msm_obj->sgt, get_dmabuf_ptr(obj)); |
| } |
| |
| obj_remove_domain(domain); |
| } |
| } |
| |
| static struct msm_gem_vma *obj_add_domain(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 *domain = kzalloc(sizeof(*domain), GFP_KERNEL); |
| |
| if (!domain) |
| return ERR_PTR(-ENOMEM); |
| |
| domain->aspace = aspace; |
| |
| list_add_tail(&domain->list, &msm_obj->domains); |
| |
| return domain; |
| } |
| |
| static struct msm_gem_vma *obj_get_domain(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 *domain; |
| |
| list_for_each_entry(domain, &msm_obj->domains, list) { |
| if (domain->aspace == aspace) |
| return domain; |
| } |
| |
| return NULL; |
| } |
| |
| /* should be called under struct_mutex.. although it can be called |
| * from atomic context without struct_mutex to acquire an extra |
| * iova ref if you know one is already held. |
| * |
| * That means when I do eventually need to add support for unpinning |
| * the refcnt counter needs to be atomic_t. |
| */ |
| int msm_gem_get_iova_locked(struct drm_gem_object *obj, |
| struct msm_gem_address_space *aspace, uint32_t *iova) |
| { |
| struct msm_gem_object *msm_obj = to_msm_bo(obj); |
| struct page **pages; |
| struct msm_gem_vma *domain; |
| int ret = 0; |
| |
| if (!iommu_present(&platform_bus_type)) { |
| pages = get_pages(obj); |
| |
| if (IS_ERR(pages)) |
| return PTR_ERR(pages); |
| |
| *iova = physaddr(obj); |
| return 0; |
| } |
| |
| domain = obj_get_domain(obj, aspace); |
| |
| if (!domain) { |
| domain = obj_add_domain(obj, aspace); |
| if (IS_ERR(domain)) |
| return PTR_ERR(domain); |
| |
| pages = get_pages(obj); |
| if (IS_ERR(pages)) { |
| obj_remove_domain(domain); |
| return PTR_ERR(pages); |
| } |
| |
| ret = msm_gem_map_vma(aspace, domain, msm_obj->sgt, |
| get_dmabuf_ptr(obj), |
| msm_obj->flags); |
| } |
| |
| if (!ret && domain) |
| *iova = domain->iova; |
| else |
| obj_remove_domain(domain); |
| |
| return ret; |
| } |
| |
| /* 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, uint32_t *iova) |
| { |
| struct msm_gem_vma *domain; |
| int ret; |
| |
| domain = obj_get_domain(obj, aspace); |
| if (domain) { |
| *iova = domain->iova; |
| return 0; |
| } |
| |
| mutex_lock(&obj->dev->struct_mutex); |
| ret = msm_gem_get_iova_locked(obj, aspace, iova); |
| mutex_unlock(&obj->dev->struct_mutex); |
| return ret; |
| } |
| |
| /* get iova without taking a reference, used in places where you have |
| * already done a 'msm_gem_get_iova()'. |
| */ |
| uint32_t msm_gem_iova(struct drm_gem_object *obj, |
| struct msm_gem_address_space *aspace) |
| { |
| struct msm_gem_vma *domain = obj_get_domain(obj, aspace); |
| |
| WARN_ON(!domain); |
| |
| return domain ? domain->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_unreference_unlocked(obj); |
| |
| fail: |
| return ret; |
| } |
| |
| void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj) |
| { |
| struct msm_gem_object *msm_obj = to_msm_bo(obj); |
| WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); |
| if (!msm_obj->vaddr) { |
| struct page **pages = get_pages(obj); |
| if (IS_ERR(pages)) |
| return ERR_CAST(pages); |
| msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, |
| VM_MAP, pgprot_writecombine(PAGE_KERNEL)); |
| if (msm_obj->vaddr == NULL) |
| return ERR_PTR(-ENOMEM); |
| } |
| msm_obj->vmap_count++; |
| return msm_obj->vaddr; |
| } |
| |
| void *msm_gem_get_vaddr(struct drm_gem_object *obj) |
| { |
| void *ret; |
| mutex_lock(&obj->dev->struct_mutex); |
| ret = msm_gem_get_vaddr_locked(obj); |
| mutex_unlock(&obj->dev->struct_mutex); |
| return ret; |
| } |
| |
| void msm_gem_put_vaddr_locked(struct drm_gem_object *obj) |
| { |
| struct msm_gem_object *msm_obj = to_msm_bo(obj); |
| WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); |
| WARN_ON(msm_obj->vmap_count < 1); |
| msm_obj->vmap_count--; |
| } |
| |
| void msm_gem_put_vaddr(struct drm_gem_object *obj) |
| { |
| mutex_lock(&obj->dev->struct_mutex); |
| msm_gem_put_vaddr_locked(obj); |
| mutex_unlock(&obj->dev->struct_mutex); |
| } |
| |
| /* 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); |
| |
| WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); |
| |
| if (msm_obj->madv != __MSM_MADV_PURGED) |
| msm_obj->madv = madv; |
| |
| return (msm_obj->madv != __MSM_MADV_PURGED); |
| } |
| |
| void msm_gem_purge(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)); |
| WARN_ON(!is_purgeable(msm_obj)); |
| WARN_ON(obj->import_attach); |
| |
| put_iova(obj); |
| |
| msm_gem_vunmap(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); |
| } |
| |
| void msm_gem_vunmap(struct drm_gem_object *obj) |
| { |
| struct msm_gem_object *msm_obj = to_msm_bo(obj); |
| |
| if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj))) |
| return; |
| |
| vunmap(msm_obj->vaddr); |
| msm_obj->vaddr = NULL; |
| } |
| |
| /* 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 fence *fence; |
| int i, ret; |
| |
| if (!exclusive) { |
| /* NOTE: _reserve_shared() must happen before _add_shared_fence(), |
| * which makes this a slightly strange place to call it. OTOH this |
| * is a convenient can-fail point to hook it in. (And similar to |
| * how etnaviv and nouveau handle this.) |
| */ |
| ret = reservation_object_reserve_shared(msm_obj->resv); |
| if (ret) |
| return 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 = 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 = 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 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 fence *fence, const char *type, |
| struct seq_file *m) |
| { |
| if (!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 msm_gem_vma *domain; |
| struct reservation_object *robj = msm_obj->resv; |
| struct reservation_object_list *fobj; |
| struct fence *fence; |
| uint64_t off = drm_vma_node_start(&obj->vma_node); |
| const char *madv; |
| |
| WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); |
| |
| 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 %zu%s\n", |
| |
| msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', |
| obj->name, obj->refcount.refcount.counter, |
| off, msm_obj->vaddr, 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(); |
| |
| /* FIXME: we need to print the address space here too */ |
| list_for_each_entry(domain, &msm_obj->domains, list) |
| seq_printf(m, " %08llx", domain->iova); |
| |
| seq_puts(m, "\n"); |
| } |
| |
| 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 |
| |
| 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); |
| |
| 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) |
| drm_free_large(msm_obj->pages); |
| |
| drm_prime_gem_destroy(obj, msm_obj->sgt); |
| } else { |
| msm_gem_vunmap(obj); |
| put_pages(obj); |
| } |
| |
| if (msm_obj->resv == &msm_obj->_resv) |
| reservation_object_fini(msm_obj->resv); |
| |
| drm_gem_object_release(obj); |
| |
| 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; |
| |
| ret = mutex_lock_interruptible(&dev->struct_mutex); |
| if (ret) |
| return ret; |
| |
| obj = msm_gem_new(dev, size, flags); |
| |
| mutex_unlock(&dev->struct_mutex); |
| |
| 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_unreference_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) |
| { |
| struct msm_drm_private *priv = dev->dev_private; |
| struct msm_gem_object *msm_obj; |
| bool use_vram = false; |
| |
| 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; |
| } |
| |
| 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 -EINVAL; |
| |
| msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL); |
| if (!msm_obj) |
| return -ENOMEM; |
| |
| if (use_vram) { |
| struct msm_gem_vma *domain = obj_add_domain(&msm_obj->base, |
| NULL); |
| |
| if (!IS_ERR(domain)) |
| msm_obj->vram_node = &domain->node; |
| } |
| |
| 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->domains); |
| |
| list_add_tail(&msm_obj->mm_list, &priv->inactive_list); |
| |
| *obj = &msm_obj->base; |
| |
| return 0; |
| } |
| |
| struct drm_gem_object *msm_gem_new(struct drm_device *dev, |
| uint32_t size, uint32_t flags) |
| { |
| struct drm_gem_object *obj = NULL; |
| int ret; |
| |
| WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
| |
| size = PAGE_ALIGN(size); |
| |
| ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); |
| if (ret) |
| goto fail; |
| |
| if (use_pages(obj)) { |
| ret = drm_gem_object_init(dev, obj, size); |
| if (ret) |
| goto fail; |
| } else { |
| drm_gem_private_object_init(dev, obj, size); |
| } |
| |
| return obj; |
| |
| fail: |
| drm_gem_object_unreference(obj); |
| return ERR_PTR(ret); |
| } |
| |
| 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); |
| if (ret) |
| goto fail; |
| |
| drm_gem_private_object_init(dev, obj, size); |
| |
| npages = size / PAGE_SIZE; |
| |
| msm_obj = to_msm_bo(obj); |
| msm_obj->sgt = sgt; |
| msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); |
| if (!msm_obj->pages) { |
| ret = -ENOMEM; |
| goto fail; |
| } |
| |
| ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); |
| if (ret) |
| goto fail; |
| |
| return obj; |
| |
| fail: |
| drm_gem_object_unreference_unlocked(obj); |
| return ERR_PTR(ret); |
| } |