| /* |
| * 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; |
| } |
| |
| /* |
| * 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)) { |
| 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)) |
| 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) { |
| 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) |
| return ERR_PTR(ret); |
| |
| 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) |
| return ERR_PTR(ret); |
| |
| 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); |
| } |