2015-12-03 10:21:29 -07:00
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/*
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* Copyright (C) 2015 Etnaviv Project
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/spinlock.h>
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#include <linux/shmem_fs.h>
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2017-02-08 10:51:29 -07:00
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#include <linux/sched/mm.h>
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2017-02-05 07:30:50 -07:00
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#include <linux/sched/task.h>
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2015-12-03 10:21:29 -07:00
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#include "etnaviv_drv.h"
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#include "etnaviv_gem.h"
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#include "etnaviv_gpu.h"
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#include "etnaviv_mmu.h"
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2017-11-17 03:14:58 -07:00
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static struct lock_class_key etnaviv_shm_lock_class;
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static struct lock_class_key etnaviv_userptr_lock_class;
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2015-12-03 10:21:29 -07:00
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static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj)
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{
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struct drm_device *dev = etnaviv_obj->base.dev;
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struct sg_table *sgt = etnaviv_obj->sgt;
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/*
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* For non-cached buffers, ensure the new pages are clean
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* because display controller, GPU, etc. are not coherent.
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*/
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if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK)
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dma_map_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL);
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}
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static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj)
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{
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struct drm_device *dev = etnaviv_obj->base.dev;
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struct sg_table *sgt = etnaviv_obj->sgt;
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/*
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* For non-cached buffers, ensure the new pages are clean
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* because display controller, GPU, etc. are not coherent:
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*
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* WARNING: The DMA API does not support concurrent CPU
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* and device access to the memory area. With BIDIRECTIONAL,
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* we will clean the cache lines which overlap the region,
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* and invalidate all cache lines (partially) contained in
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* the region.
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*
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* If you have dirty data in the overlapping cache lines,
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* that will corrupt the GPU-written data. If you have
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* written into the remainder of the region, this can
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* discard those writes.
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*/
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if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK)
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dma_unmap_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL);
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}
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/* called with etnaviv_obj->lock held */
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static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
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{
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struct drm_device *dev = etnaviv_obj->base.dev;
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struct page **p = drm_gem_get_pages(&etnaviv_obj->base);
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if (IS_ERR(p)) {
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2017-06-06 01:17:07 -06:00
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dev_dbg(dev->dev, "could not get pages: %ld\n", PTR_ERR(p));
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2015-12-03 10:21:29 -07:00
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return PTR_ERR(p);
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}
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etnaviv_obj->pages = p;
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return 0;
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}
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static void put_pages(struct etnaviv_gem_object *etnaviv_obj)
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{
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if (etnaviv_obj->sgt) {
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etnaviv_gem_scatterlist_unmap(etnaviv_obj);
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sg_free_table(etnaviv_obj->sgt);
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kfree(etnaviv_obj->sgt);
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etnaviv_obj->sgt = NULL;
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}
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if (etnaviv_obj->pages) {
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drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages,
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true, false);
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etnaviv_obj->pages = NULL;
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}
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}
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struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
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{
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int ret;
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lockdep_assert_held(&etnaviv_obj->lock);
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if (!etnaviv_obj->pages) {
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ret = etnaviv_obj->ops->get_pages(etnaviv_obj);
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if (ret < 0)
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return ERR_PTR(ret);
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}
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if (!etnaviv_obj->sgt) {
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struct drm_device *dev = etnaviv_obj->base.dev;
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int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
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struct sg_table *sgt;
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sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages);
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if (IS_ERR(sgt)) {
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dev_err(dev->dev, "failed to allocate sgt: %ld\n",
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PTR_ERR(sgt));
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return ERR_CAST(sgt);
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}
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etnaviv_obj->sgt = sgt;
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etnaviv_gem_scatter_map(etnaviv_obj);
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}
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return etnaviv_obj->pages;
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}
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void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj)
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{
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lockdep_assert_held(&etnaviv_obj->lock);
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/* when we start tracking the pin count, then do something here */
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}
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2016-04-27 04:12:00 -06:00
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static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
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2015-12-03 10:21:29 -07:00
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struct vm_area_struct *vma)
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{
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pgprot_t vm_page_prot;
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vma->vm_flags &= ~VM_PFNMAP;
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vma->vm_flags |= VM_MIXEDMAP;
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vm_page_prot = vm_get_page_prot(vma->vm_flags);
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if (etnaviv_obj->flags & ETNA_BO_WC) {
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vma->vm_page_prot = pgprot_writecombine(vm_page_prot);
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} else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) {
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vma->vm_page_prot = pgprot_noncached(vm_page_prot);
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} else {
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/*
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* Shunt off cached objs to shmem file so they have their own
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* address_space (so unmap_mapping_range does what we want,
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* in particular in the case of mmap'd dmabufs)
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*/
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fput(vma->vm_file);
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2016-04-27 04:12:00 -06:00
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get_file(etnaviv_obj->base.filp);
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2015-12-03 10:21:29 -07:00
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vma->vm_pgoff = 0;
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2016-04-27 04:12:00 -06:00
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vma->vm_file = etnaviv_obj->base.filp;
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2015-12-03 10:21:29 -07:00
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vma->vm_page_prot = vm_page_prot;
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}
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return 0;
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}
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int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma)
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{
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struct etnaviv_gem_object *obj;
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int ret;
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ret = drm_gem_mmap(filp, vma);
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if (ret) {
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DBG("mmap failed: %d", ret);
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return ret;
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}
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obj = to_etnaviv_bo(vma->vm_private_data);
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2016-04-27 04:27:02 -06:00
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return obj->ops->mmap(obj, vma);
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2015-12-03 10:21:29 -07:00
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}
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2017-02-24 15:56:41 -07:00
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int etnaviv_gem_fault(struct vm_fault *vmf)
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2015-12-03 10:21:29 -07:00
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{
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2017-02-24 15:56:41 -07:00
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struct vm_area_struct *vma = vmf->vma;
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2015-12-03 10:21:29 -07:00
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struct drm_gem_object *obj = vma->vm_private_data;
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struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
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struct page **pages, *page;
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pgoff_t pgoff;
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int ret;
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/*
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* Make sure we don't parallel update on a fault, nor move or remove
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* something from beneath our feet. Note that vm_insert_page() is
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* specifically coded to take care of this, so we don't have to.
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*/
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ret = mutex_lock_interruptible(&etnaviv_obj->lock);
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if (ret)
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goto out;
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/* make sure we have pages attached now */
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pages = etnaviv_gem_get_pages(etnaviv_obj);
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mutex_unlock(&etnaviv_obj->lock);
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if (IS_ERR(pages)) {
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ret = PTR_ERR(pages);
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goto out;
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}
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/* We don't use vmf->pgoff since that has the fake offset: */
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2016-12-14 16:07:01 -07:00
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pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
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2015-12-03 10:21:29 -07:00
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page = pages[pgoff];
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2016-12-14 16:07:01 -07:00
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VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
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2015-12-03 10:21:29 -07:00
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page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT);
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2016-12-14 16:07:01 -07:00
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ret = vm_insert_page(vma, vmf->address, page);
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2015-12-03 10:21:29 -07:00
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out:
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switch (ret) {
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case -EAGAIN:
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case 0:
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case -ERESTARTSYS:
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case -EINTR:
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case -EBUSY:
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/*
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* EBUSY is ok: this just means that another thread
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* already did the job.
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*/
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return VM_FAULT_NOPAGE;
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case -ENOMEM:
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return VM_FAULT_OOM;
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default:
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return VM_FAULT_SIGBUS;
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}
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}
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int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset)
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{
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int ret;
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/* Make it mmapable */
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ret = drm_gem_create_mmap_offset(obj);
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if (ret)
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dev_err(obj->dev->dev, "could not allocate mmap offset\n");
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else
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*offset = drm_vma_node_offset_addr(&obj->vma_node);
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return ret;
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}
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static struct etnaviv_vram_mapping *
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etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj,
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struct etnaviv_iommu *mmu)
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{
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struct etnaviv_vram_mapping *mapping;
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list_for_each_entry(mapping, &obj->vram_list, obj_node) {
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if (mapping->mmu == mmu)
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return mapping;
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}
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return NULL;
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}
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2016-01-21 08:20:50 -07:00
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void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping)
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{
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struct etnaviv_gem_object *etnaviv_obj = mapping->object;
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2017-08-03 05:58:23 -06:00
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drm_gem_object_get(&etnaviv_obj->base);
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2016-01-21 08:20:50 -07:00
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mutex_lock(&etnaviv_obj->lock);
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WARN_ON(mapping->use == 0);
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mapping->use += 1;
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mutex_unlock(&etnaviv_obj->lock);
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}
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void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping)
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{
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struct etnaviv_gem_object *etnaviv_obj = mapping->object;
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mutex_lock(&etnaviv_obj->lock);
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WARN_ON(mapping->use == 0);
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mapping->use -= 1;
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mutex_unlock(&etnaviv_obj->lock);
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2017-08-03 05:58:23 -06:00
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drm_gem_object_put_unlocked(&etnaviv_obj->base);
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2016-01-21 08:20:50 -07:00
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}
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struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
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struct drm_gem_object *obj, struct etnaviv_gpu *gpu)
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2015-12-03 10:21:29 -07:00
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{
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struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
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struct etnaviv_vram_mapping *mapping;
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struct page **pages;
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int ret = 0;
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mutex_lock(&etnaviv_obj->lock);
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mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, gpu->mmu);
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if (mapping) {
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/*
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* Holding the object lock prevents the use count changing
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* beneath us. If the use count is zero, the MMU might be
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* reaping this object, so take the lock and re-check that
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* the MMU owns this mapping to close this race.
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*/
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if (mapping->use == 0) {
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mutex_lock(&gpu->mmu->lock);
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if (mapping->mmu == gpu->mmu)
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mapping->use += 1;
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else
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mapping = NULL;
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mutex_unlock(&gpu->mmu->lock);
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if (mapping)
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goto out;
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} else {
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mapping->use += 1;
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goto out;
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}
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}
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pages = etnaviv_gem_get_pages(etnaviv_obj);
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if (IS_ERR(pages)) {
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ret = PTR_ERR(pages);
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goto out;
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}
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/*
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* See if we have a reaped vram mapping we can re-use before
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* allocating a fresh mapping.
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*/
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mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL);
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if (!mapping) {
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mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
|
2016-01-04 06:10:24 -07:00
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if (!mapping) {
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ret = -ENOMEM;
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goto out;
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}
|
2015-12-03 10:21:29 -07:00
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INIT_LIST_HEAD(&mapping->scan_node);
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mapping->object = etnaviv_obj;
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} else {
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list_del(&mapping->obj_node);
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}
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|
|
|
|
mapping->mmu = gpu->mmu;
|
|
|
|
mapping->use = 1;
|
|
|
|
|
|
|
|
ret = etnaviv_iommu_map_gem(gpu->mmu, etnaviv_obj, gpu->memory_base,
|
|
|
|
mapping);
|
|
|
|
if (ret < 0)
|
|
|
|
kfree(mapping);
|
|
|
|
else
|
|
|
|
list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list);
|
|
|
|
|
|
|
|
out:
|
|
|
|
mutex_unlock(&etnaviv_obj->lock);
|
|
|
|
|
2016-01-21 08:20:50 -07:00
|
|
|
if (ret)
|
|
|
|
return ERR_PTR(ret);
|
2015-12-03 10:21:29 -07:00
|
|
|
|
2016-01-21 08:20:50 -07:00
|
|
|
/* Take a reference on the object */
|
2017-08-03 05:58:23 -06:00
|
|
|
drm_gem_object_get(obj);
|
2016-01-21 08:20:50 -07:00
|
|
|
return mapping;
|
2015-12-03 10:21:29 -07:00
|
|
|
}
|
|
|
|
|
2016-01-26 10:10:32 -07:00
|
|
|
void *etnaviv_gem_vmap(struct drm_gem_object *obj)
|
2015-12-03 10:21:29 -07:00
|
|
|
{
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
|
|
|
2016-01-25 07:47:28 -07:00
|
|
|
if (etnaviv_obj->vaddr)
|
|
|
|
return etnaviv_obj->vaddr;
|
2015-12-03 10:21:29 -07:00
|
|
|
|
2016-01-25 07:47:28 -07:00
|
|
|
mutex_lock(&etnaviv_obj->lock);
|
|
|
|
/*
|
|
|
|
* Need to check again, as we might have raced with another thread
|
|
|
|
* while waiting for the mutex.
|
|
|
|
*/
|
|
|
|
if (!etnaviv_obj->vaddr)
|
|
|
|
etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj);
|
2015-12-03 10:21:29 -07:00
|
|
|
mutex_unlock(&etnaviv_obj->lock);
|
|
|
|
|
|
|
|
return etnaviv_obj->vaddr;
|
|
|
|
}
|
|
|
|
|
2016-01-25 07:47:28 -07:00
|
|
|
static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj)
|
|
|
|
{
|
|
|
|
struct page **pages;
|
|
|
|
|
|
|
|
lockdep_assert_held(&obj->lock);
|
|
|
|
|
|
|
|
pages = etnaviv_gem_get_pages(obj);
|
|
|
|
if (IS_ERR(pages))
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
return vmap(pages, obj->base.size >> PAGE_SHIFT,
|
|
|
|
VM_MAP, pgprot_writecombine(PAGE_KERNEL));
|
|
|
|
}
|
|
|
|
|
2015-12-03 10:21:29 -07:00
|
|
|
static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op)
|
|
|
|
{
|
|
|
|
if (op & ETNA_PREP_READ)
|
|
|
|
return DMA_FROM_DEVICE;
|
|
|
|
else if (op & ETNA_PREP_WRITE)
|
|
|
|
return DMA_TO_DEVICE;
|
|
|
|
else
|
|
|
|
return DMA_BIDIRECTIONAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op,
|
|
|
|
struct timespec *timeout)
|
|
|
|
{
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
|
|
struct drm_device *dev = obj->dev;
|
|
|
|
bool write = !!(op & ETNA_PREP_WRITE);
|
2017-05-18 10:36:14 -06:00
|
|
|
int ret;
|
|
|
|
|
2017-06-06 01:17:08 -06:00
|
|
|
if (!etnaviv_obj->sgt) {
|
|
|
|
void *ret;
|
|
|
|
|
|
|
|
mutex_lock(&etnaviv_obj->lock);
|
|
|
|
ret = etnaviv_gem_get_pages(etnaviv_obj);
|
|
|
|
mutex_unlock(&etnaviv_obj->lock);
|
|
|
|
if (IS_ERR(ret))
|
|
|
|
return PTR_ERR(ret);
|
|
|
|
}
|
|
|
|
|
2017-05-18 10:36:14 -06:00
|
|
|
if (op & ETNA_PREP_NOSYNC) {
|
|
|
|
if (!reservation_object_test_signaled_rcu(etnaviv_obj->resv,
|
|
|
|
write))
|
|
|
|
return -EBUSY;
|
|
|
|
} else {
|
|
|
|
unsigned long remain = etnaviv_timeout_to_jiffies(timeout);
|
|
|
|
|
|
|
|
ret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv,
|
|
|
|
write, true, remain);
|
|
|
|
if (ret <= 0)
|
|
|
|
return ret == 0 ? -ETIMEDOUT : ret;
|
|
|
|
}
|
2015-12-03 10:21:29 -07:00
|
|
|
|
|
|
|
if (etnaviv_obj->flags & ETNA_BO_CACHED) {
|
|
|
|
dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl,
|
|
|
|
etnaviv_obj->sgt->nents,
|
|
|
|
etnaviv_op_to_dma_dir(op));
|
|
|
|
etnaviv_obj->last_cpu_prep_op = op;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int etnaviv_gem_cpu_fini(struct drm_gem_object *obj)
|
|
|
|
{
|
|
|
|
struct drm_device *dev = obj->dev;
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
|
|
|
|
|
|
if (etnaviv_obj->flags & ETNA_BO_CACHED) {
|
|
|
|
/* fini without a prep is almost certainly a userspace error */
|
|
|
|
WARN_ON(etnaviv_obj->last_cpu_prep_op == 0);
|
|
|
|
dma_sync_sg_for_device(dev->dev, etnaviv_obj->sgt->sgl,
|
|
|
|
etnaviv_obj->sgt->nents,
|
|
|
|
etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op));
|
|
|
|
etnaviv_obj->last_cpu_prep_op = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
|
|
|
|
struct timespec *timeout)
|
|
|
|
{
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
|
|
|
|
|
|
return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
2016-10-25 06:00:45 -06:00
|
|
|
static void etnaviv_gem_describe_fence(struct dma_fence *fence,
|
2015-12-03 10:21:29 -07:00
|
|
|
const char *type, struct seq_file *m)
|
|
|
|
{
|
2016-10-25 06:00:45 -06:00
|
|
|
if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
|
2015-12-03 10:21:29 -07:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
|
|
|
|
{
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
|
|
struct reservation_object *robj = etnaviv_obj->resv;
|
|
|
|
struct reservation_object_list *fobj;
|
2016-10-25 06:00:45 -06:00
|
|
|
struct dma_fence *fence;
|
2015-12-03 10:21:29 -07:00
|
|
|
unsigned long off = drm_vma_node_start(&obj->vma_node);
|
|
|
|
|
|
|
|
seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n",
|
|
|
|
etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I',
|
2016-11-14 09:29:48 -07:00
|
|
|
obj->name, kref_read(&obj->refcount),
|
2015-12-03 10:21:29 -07:00
|
|
|
off, etnaviv_obj->vaddr, obj->size);
|
|
|
|
|
|
|
|
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]);
|
|
|
|
etnaviv_gem_describe_fence(fence, "Shared", m);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fence = rcu_dereference(robj->fence_excl);
|
|
|
|
if (fence)
|
|
|
|
etnaviv_gem_describe_fence(fence, "Exclusive", m);
|
|
|
|
rcu_read_unlock();
|
|
|
|
}
|
|
|
|
|
|
|
|
void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv,
|
|
|
|
struct seq_file *m)
|
|
|
|
{
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj;
|
|
|
|
int count = 0;
|
|
|
|
size_t size = 0;
|
|
|
|
|
|
|
|
mutex_lock(&priv->gem_lock);
|
|
|
|
list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) {
|
|
|
|
struct drm_gem_object *obj = &etnaviv_obj->base;
|
|
|
|
|
|
|
|
seq_puts(m, " ");
|
|
|
|
etnaviv_gem_describe(obj, m);
|
|
|
|
count++;
|
|
|
|
size += obj->size;
|
|
|
|
}
|
|
|
|
mutex_unlock(&priv->gem_lock);
|
|
|
|
|
|
|
|
seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj)
|
|
|
|
{
|
2016-07-22 07:56:15 -06:00
|
|
|
vunmap(etnaviv_obj->vaddr);
|
2015-12-03 10:21:29 -07:00
|
|
|
put_pages(etnaviv_obj);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = {
|
|
|
|
.get_pages = etnaviv_gem_shmem_get_pages,
|
|
|
|
.release = etnaviv_gem_shmem_release,
|
2016-01-25 07:47:28 -07:00
|
|
|
.vmap = etnaviv_gem_vmap_impl,
|
2016-04-27 04:27:02 -06:00
|
|
|
.mmap = etnaviv_gem_mmap_obj,
|
2015-12-03 10:21:29 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
void etnaviv_gem_free_object(struct drm_gem_object *obj)
|
|
|
|
{
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
2017-09-11 07:29:31 -06:00
|
|
|
struct etnaviv_drm_private *priv = obj->dev->dev_private;
|
2015-12-03 10:21:29 -07:00
|
|
|
struct etnaviv_vram_mapping *mapping, *tmp;
|
|
|
|
|
|
|
|
/* object should not be active */
|
|
|
|
WARN_ON(is_active(etnaviv_obj));
|
|
|
|
|
2017-09-11 07:29:31 -06:00
|
|
|
mutex_lock(&priv->gem_lock);
|
2015-12-03 10:21:29 -07:00
|
|
|
list_del(&etnaviv_obj->gem_node);
|
2017-09-11 07:29:31 -06:00
|
|
|
mutex_unlock(&priv->gem_lock);
|
2015-12-03 10:21:29 -07:00
|
|
|
|
|
|
|
list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list,
|
|
|
|
obj_node) {
|
|
|
|
struct etnaviv_iommu *mmu = mapping->mmu;
|
|
|
|
|
|
|
|
WARN_ON(mapping->use);
|
|
|
|
|
|
|
|
if (mmu)
|
|
|
|
etnaviv_iommu_unmap_gem(mmu, mapping);
|
|
|
|
|
|
|
|
list_del(&mapping->obj_node);
|
|
|
|
kfree(mapping);
|
|
|
|
}
|
|
|
|
|
|
|
|
drm_gem_free_mmap_offset(obj);
|
|
|
|
etnaviv_obj->ops->release(etnaviv_obj);
|
|
|
|
if (etnaviv_obj->resv == &etnaviv_obj->_resv)
|
|
|
|
reservation_object_fini(&etnaviv_obj->_resv);
|
|
|
|
drm_gem_object_release(obj);
|
|
|
|
|
|
|
|
kfree(etnaviv_obj);
|
|
|
|
}
|
|
|
|
|
2017-11-17 04:17:14 -07:00
|
|
|
void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj)
|
2015-12-03 10:21:29 -07:00
|
|
|
{
|
|
|
|
struct etnaviv_drm_private *priv = dev->dev_private;
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
|
|
|
|
|
|
|
|
mutex_lock(&priv->gem_lock);
|
|
|
|
list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list);
|
|
|
|
mutex_unlock(&priv->gem_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags,
|
|
|
|
struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
|
|
|
|
struct drm_gem_object **obj)
|
|
|
|
{
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj;
|
|
|
|
unsigned sz = sizeof(*etnaviv_obj);
|
|
|
|
bool valid = true;
|
|
|
|
|
|
|
|
/* validate flags */
|
|
|
|
switch (flags & ETNA_BO_CACHE_MASK) {
|
|
|
|
case ETNA_BO_UNCACHED:
|
|
|
|
case ETNA_BO_CACHED:
|
|
|
|
case ETNA_BO_WC:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
valid = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!valid) {
|
|
|
|
dev_err(dev->dev, "invalid cache flag: %x\n",
|
|
|
|
(flags & ETNA_BO_CACHE_MASK));
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
etnaviv_obj = kzalloc(sz, GFP_KERNEL);
|
|
|
|
if (!etnaviv_obj)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
etnaviv_obj->flags = flags;
|
|
|
|
etnaviv_obj->ops = ops;
|
|
|
|
if (robj) {
|
|
|
|
etnaviv_obj->resv = robj;
|
|
|
|
} else {
|
|
|
|
etnaviv_obj->resv = &etnaviv_obj->_resv;
|
|
|
|
reservation_object_init(&etnaviv_obj->_resv);
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_init(&etnaviv_obj->lock);
|
|
|
|
INIT_LIST_HEAD(&etnaviv_obj->vram_list);
|
|
|
|
|
|
|
|
*obj = &etnaviv_obj->base;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-11-17 04:11:25 -07:00
|
|
|
/* convenience method to construct a GEM buffer object, and userspace handle */
|
|
|
|
int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file,
|
|
|
|
u32 size, u32 flags, u32 *handle)
|
2015-12-03 10:21:29 -07:00
|
|
|
{
|
|
|
|
struct drm_gem_object *obj = NULL;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
size = PAGE_ALIGN(size);
|
|
|
|
|
|
|
|
ret = etnaviv_gem_new_impl(dev, size, flags, NULL,
|
|
|
|
&etnaviv_gem_shmem_ops, &obj);
|
|
|
|
if (ret)
|
|
|
|
goto fail;
|
|
|
|
|
2017-11-17 03:14:58 -07:00
|
|
|
lockdep_set_class(&to_etnaviv_bo(obj)->lock, &etnaviv_shm_lock_class);
|
|
|
|
|
2015-12-03 10:21:29 -07:00
|
|
|
ret = drm_gem_object_init(dev, obj, size);
|
|
|
|
if (ret == 0) {
|
|
|
|
struct address_space *mapping;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Our buffers are kept pinned, so allocating them
|
|
|
|
* from the MOVABLE zone is a really bad idea, and
|
2017-11-17 04:11:25 -07:00
|
|
|
* conflicts with CMA. See comments above new_inode()
|
2015-12-03 10:21:29 -07:00
|
|
|
* why this is required _and_ expected if you're
|
|
|
|
* going to pin these pages.
|
|
|
|
*/
|
2015-12-04 21:45:44 -07:00
|
|
|
mapping = obj->filp->f_mapping;
|
2017-06-06 01:17:06 -06:00
|
|
|
mapping_set_gfp_mask(mapping, GFP_HIGHUSER |
|
2017-08-11 03:43:17 -06:00
|
|
|
__GFP_RETRY_MAYFAIL | __GFP_NOWARN);
|
2015-12-03 10:21:29 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
if (ret)
|
|
|
|
goto fail;
|
|
|
|
|
2017-11-17 04:17:14 -07:00
|
|
|
etnaviv_gem_obj_add(dev, obj);
|
2015-12-03 10:21:29 -07:00
|
|
|
|
|
|
|
ret = drm_gem_handle_create(file, obj, handle);
|
|
|
|
|
|
|
|
/* drop reference from allocate - handle holds it now */
|
2017-11-17 04:11:25 -07:00
|
|
|
fail:
|
2017-08-03 05:58:23 -06:00
|
|
|
drm_gem_object_put_unlocked(obj);
|
2015-12-03 10:21:29 -07:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
|
|
|
|
struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
|
|
|
|
struct etnaviv_gem_object **res)
|
|
|
|
{
|
|
|
|
struct drm_gem_object *obj;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = etnaviv_gem_new_impl(dev, size, flags, robj, ops, &obj);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
drm_gem_private_object_init(dev, obj, size);
|
|
|
|
|
|
|
|
*res = to_etnaviv_bo(obj);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj)
|
|
|
|
{
|
|
|
|
struct page **pvec = NULL;
|
2017-11-17 06:16:10 -07:00
|
|
|
struct etnaviv_gem_userptr *userptr = &etnaviv_obj->userptr;
|
|
|
|
int ret, pinned = 0, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
|
2015-12-03 10:21:29 -07:00
|
|
|
|
2017-11-17 03:23:17 -07:00
|
|
|
might_lock_read(¤t->mm->mmap_sem);
|
|
|
|
|
2017-11-17 06:16:10 -07:00
|
|
|
if (userptr->mm != current->mm)
|
|
|
|
return -EPERM;
|
2015-12-03 10:21:29 -07:00
|
|
|
|
2017-11-17 06:16:10 -07:00
|
|
|
pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
|
|
|
|
if (!pvec)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
do {
|
|
|
|
unsigned num_pages = npages - pinned;
|
|
|
|
uint64_t ptr = userptr->ptr + pinned * PAGE_SIZE;
|
|
|
|
struct page **pages = pvec + pinned;
|
2015-12-03 10:21:29 -07:00
|
|
|
|
2017-11-17 06:16:10 -07:00
|
|
|
ret = get_user_pages_fast(ptr, num_pages,
|
|
|
|
!userptr->ro ? FOLL_WRITE : 0, pages);
|
|
|
|
if (ret < 0) {
|
|
|
|
release_pages(pvec, pinned);
|
2017-05-17 06:23:12 -06:00
|
|
|
kvfree(pvec);
|
2017-11-17 06:16:10 -07:00
|
|
|
return ret;
|
2015-12-03 10:21:29 -07:00
|
|
|
}
|
|
|
|
|
2017-11-17 06:16:10 -07:00
|
|
|
pinned += ret;
|
2015-12-03 10:21:29 -07:00
|
|
|
|
2017-11-17 06:16:10 -07:00
|
|
|
} while (pinned < npages);
|
2015-12-03 10:21:29 -07:00
|
|
|
|
2017-11-17 06:16:10 -07:00
|
|
|
etnaviv_obj->pages = pvec;
|
2015-12-03 10:21:29 -07:00
|
|
|
|
2017-11-17 06:16:10 -07:00
|
|
|
return 0;
|
2015-12-03 10:21:29 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj)
|
|
|
|
{
|
|
|
|
if (etnaviv_obj->sgt) {
|
|
|
|
etnaviv_gem_scatterlist_unmap(etnaviv_obj);
|
|
|
|
sg_free_table(etnaviv_obj->sgt);
|
|
|
|
kfree(etnaviv_obj->sgt);
|
|
|
|
}
|
|
|
|
if (etnaviv_obj->pages) {
|
|
|
|
int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
|
|
|
|
|
2017-11-15 18:37:55 -07:00
|
|
|
release_pages(etnaviv_obj->pages, npages);
|
2017-05-17 06:23:12 -06:00
|
|
|
kvfree(etnaviv_obj->pages);
|
2015-12-03 10:21:29 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-04-27 04:27:02 -06:00
|
|
|
static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
|
|
|
|
struct vm_area_struct *vma)
|
|
|
|
{
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2015-12-03 10:21:29 -07:00
|
|
|
static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = {
|
|
|
|
.get_pages = etnaviv_gem_userptr_get_pages,
|
|
|
|
.release = etnaviv_gem_userptr_release,
|
2016-01-25 07:47:28 -07:00
|
|
|
.vmap = etnaviv_gem_vmap_impl,
|
2016-04-27 04:27:02 -06:00
|
|
|
.mmap = etnaviv_gem_userptr_mmap_obj,
|
2015-12-03 10:21:29 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file,
|
|
|
|
uintptr_t ptr, u32 size, u32 flags, u32 *handle)
|
|
|
|
{
|
|
|
|
struct etnaviv_gem_object *etnaviv_obj;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, NULL,
|
|
|
|
&etnaviv_gem_userptr_ops, &etnaviv_obj);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
2017-11-17 03:14:58 -07:00
|
|
|
lockdep_set_class(&etnaviv_obj->lock, &etnaviv_userptr_lock_class);
|
|
|
|
|
2015-12-03 10:21:29 -07:00
|
|
|
etnaviv_obj->userptr.ptr = ptr;
|
2017-11-17 06:16:10 -07:00
|
|
|
etnaviv_obj->userptr.mm = current->mm;
|
2015-12-03 10:21:29 -07:00
|
|
|
etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE);
|
|
|
|
|
2017-11-17 04:17:14 -07:00
|
|
|
etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
|
2015-12-03 10:21:29 -07:00
|
|
|
|
|
|
|
ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle);
|
2017-11-17 04:17:14 -07:00
|
|
|
|
2015-12-03 10:21:29 -07:00
|
|
|
/* drop reference from allocate - handle holds it now */
|
2017-08-03 05:58:23 -06:00
|
|
|
drm_gem_object_put_unlocked(&etnaviv_obj->base);
|
2015-12-03 10:21:29 -07:00
|
|
|
return ret;
|
|
|
|
}
|