diff options
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem.c | 1112 |
1 files changed, 1112 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c new file mode 100644 index 000000000..c551d8444 --- /dev/null +++ b/drivers/gpu/drm/msm/msm_gem.c @@ -0,0 +1,1112 @@ +/* + * 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); +} |