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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/etnaviv/etnaviv_gem.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_gem.c')
-rw-r--r--drivers/gpu/drm/etnaviv/etnaviv_gem.c731
1 files changed, 731 insertions, 0 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
new file mode 100644
index 000000000..5cf13e52f
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
@@ -0,0 +1,731 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2015-2018 Etnaviv Project
+ */
+
+#include <drm/drm_prime.h>
+#include <linux/dma-mapping.h>
+#include <linux/shmem_fs.h>
+#include <linux/spinlock.h>
+#include <linux/vmalloc.h>
+
+#include "etnaviv_drv.h"
+#include "etnaviv_gem.h"
+#include "etnaviv_gpu.h"
+#include "etnaviv_mmu.h"
+
+static struct lock_class_key etnaviv_shm_lock_class;
+static struct lock_class_key etnaviv_userptr_lock_class;
+
+static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj)
+{
+ struct drm_device *dev = etnaviv_obj->base.dev;
+ struct sg_table *sgt = etnaviv_obj->sgt;
+
+ /*
+ * For non-cached buffers, ensure the new pages are clean
+ * because display controller, GPU, etc. are not coherent.
+ */
+ if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK)
+ dma_map_sgtable(dev->dev, sgt, DMA_BIDIRECTIONAL, 0);
+}
+
+static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj)
+{
+ struct drm_device *dev = etnaviv_obj->base.dev;
+ struct sg_table *sgt = etnaviv_obj->sgt;
+
+ /*
+ * For non-cached buffers, ensure the new pages are clean
+ * because display controller, GPU, etc. are not coherent:
+ *
+ * WARNING: The DMA API does not support concurrent CPU
+ * and device access to the memory area. With BIDIRECTIONAL,
+ * we will clean the cache lines which overlap the region,
+ * and invalidate all cache lines (partially) contained in
+ * the region.
+ *
+ * If you have dirty data in the overlapping cache lines,
+ * that will corrupt the GPU-written data. If you have
+ * written into the remainder of the region, this can
+ * discard those writes.
+ */
+ if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK)
+ dma_unmap_sgtable(dev->dev, sgt, DMA_BIDIRECTIONAL, 0);
+}
+
+/* called with etnaviv_obj->lock held */
+static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
+{
+ struct drm_device *dev = etnaviv_obj->base.dev;
+ struct page **p = drm_gem_get_pages(&etnaviv_obj->base);
+
+ if (IS_ERR(p)) {
+ dev_dbg(dev->dev, "could not get pages: %ld\n", PTR_ERR(p));
+ return PTR_ERR(p);
+ }
+
+ etnaviv_obj->pages = p;
+
+ return 0;
+}
+
+static void put_pages(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);
+ etnaviv_obj->sgt = NULL;
+ }
+ if (etnaviv_obj->pages) {
+ drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages,
+ true, false);
+
+ etnaviv_obj->pages = NULL;
+ }
+}
+
+struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj)
+{
+ int ret;
+
+ lockdep_assert_held(&etnaviv_obj->lock);
+
+ if (!etnaviv_obj->pages) {
+ ret = etnaviv_obj->ops->get_pages(etnaviv_obj);
+ if (ret < 0)
+ return ERR_PTR(ret);
+ }
+
+ if (!etnaviv_obj->sgt) {
+ struct drm_device *dev = etnaviv_obj->base.dev;
+ int npages = etnaviv_obj->base.size >> PAGE_SHIFT;
+ struct sg_table *sgt;
+
+ sgt = drm_prime_pages_to_sg(etnaviv_obj->base.dev,
+ etnaviv_obj->pages, npages);
+ if (IS_ERR(sgt)) {
+ dev_err(dev->dev, "failed to allocate sgt: %ld\n",
+ PTR_ERR(sgt));
+ return ERR_CAST(sgt);
+ }
+
+ etnaviv_obj->sgt = sgt;
+
+ etnaviv_gem_scatter_map(etnaviv_obj);
+ }
+
+ return etnaviv_obj->pages;
+}
+
+void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj)
+{
+ lockdep_assert_held(&etnaviv_obj->lock);
+ /* when we start tracking the pin count, then do something here */
+}
+
+static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
+ struct vm_area_struct *vma)
+{
+ pgprot_t vm_page_prot;
+
+ vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
+
+ vm_page_prot = vm_get_page_prot(vma->vm_flags);
+
+ if (etnaviv_obj->flags & ETNA_BO_WC) {
+ vma->vm_page_prot = pgprot_writecombine(vm_page_prot);
+ } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) {
+ vma->vm_page_prot = pgprot_noncached(vm_page_prot);
+ } 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)
+ */
+ vma->vm_pgoff = 0;
+ vma_set_file(vma, etnaviv_obj->base.filp);
+
+ vma->vm_page_prot = vm_page_prot;
+ }
+
+ return 0;
+}
+
+static int etnaviv_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
+{
+ struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+
+ return etnaviv_obj->ops->mmap(etnaviv_obj, vma);
+}
+
+static vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf)
+{
+ struct vm_area_struct *vma = vmf->vma;
+ struct drm_gem_object *obj = vma->vm_private_data;
+ struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+ struct page **pages, *page;
+ pgoff_t pgoff;
+ int err;
+
+ /*
+ * Make sure we don't parallel update on a fault, nor move or remove
+ * something from beneath our feet. Note that vmf_insert_page() is
+ * specifically coded to take care of this, so we don't have to.
+ */
+ err = mutex_lock_interruptible(&etnaviv_obj->lock);
+ if (err)
+ return VM_FAULT_NOPAGE;
+ /* make sure we have pages attached now */
+ pages = etnaviv_gem_get_pages(etnaviv_obj);
+ mutex_unlock(&etnaviv_obj->lock);
+
+ if (IS_ERR(pages)) {
+ err = PTR_ERR(pages);
+ return vmf_error(err);
+ }
+
+ /* We don't use vmf->pgoff since that has the fake offset: */
+ pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
+
+ page = pages[pgoff];
+
+ VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
+ page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT);
+
+ return vmf_insert_page(vma, vmf->address, page);
+}
+
+int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset)
+{
+ int ret;
+
+ /* Make it mmapable */
+ ret = drm_gem_create_mmap_offset(obj);
+ if (ret)
+ dev_err(obj->dev->dev, "could not allocate mmap offset\n");
+ else
+ *offset = drm_vma_node_offset_addr(&obj->vma_node);
+
+ return ret;
+}
+
+static struct etnaviv_vram_mapping *
+etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj,
+ struct etnaviv_iommu_context *context)
+{
+ struct etnaviv_vram_mapping *mapping;
+
+ list_for_each_entry(mapping, &obj->vram_list, obj_node) {
+ if (mapping->context == context)
+ return mapping;
+ }
+
+ return NULL;
+}
+
+void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping)
+{
+ struct etnaviv_gem_object *etnaviv_obj = mapping->object;
+
+ mutex_lock(&etnaviv_obj->lock);
+ WARN_ON(mapping->use == 0);
+ mapping->use -= 1;
+ mutex_unlock(&etnaviv_obj->lock);
+
+ drm_gem_object_put(&etnaviv_obj->base);
+}
+
+struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
+ struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu_context,
+ u64 va)
+{
+ struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+ struct etnaviv_vram_mapping *mapping;
+ struct page **pages;
+ int ret = 0;
+
+ mutex_lock(&etnaviv_obj->lock);
+ mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, mmu_context);
+ if (mapping) {
+ /*
+ * Holding the object lock prevents the use count changing
+ * beneath us. If the use count is zero, the MMU might be
+ * reaping this object, so take the lock and re-check that
+ * the MMU owns this mapping to close this race.
+ */
+ if (mapping->use == 0) {
+ mutex_lock(&mmu_context->lock);
+ if (mapping->context == mmu_context)
+ if (va && mapping->iova != va) {
+ etnaviv_iommu_reap_mapping(mapping);
+ mapping = NULL;
+ } else {
+ mapping->use += 1;
+ }
+ else
+ mapping = NULL;
+ mutex_unlock(&mmu_context->lock);
+ if (mapping)
+ goto out;
+ } else {
+ mapping->use += 1;
+ goto out;
+ }
+ }
+
+ pages = etnaviv_gem_get_pages(etnaviv_obj);
+ if (IS_ERR(pages)) {
+ ret = PTR_ERR(pages);
+ goto out;
+ }
+
+ /*
+ * See if we have a reaped vram mapping we can re-use before
+ * allocating a fresh mapping.
+ */
+ mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL);
+ if (!mapping) {
+ mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
+ if (!mapping) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ INIT_LIST_HEAD(&mapping->scan_node);
+ mapping->object = etnaviv_obj;
+ } else {
+ list_del(&mapping->obj_node);
+ }
+
+ mapping->use = 1;
+
+ ret = etnaviv_iommu_map_gem(mmu_context, etnaviv_obj,
+ mmu_context->global->memory_base,
+ mapping, va);
+ if (ret < 0)
+ kfree(mapping);
+ else
+ list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list);
+
+out:
+ mutex_unlock(&etnaviv_obj->lock);
+
+ if (ret)
+ return ERR_PTR(ret);
+
+ /* Take a reference on the object */
+ drm_gem_object_get(obj);
+ return mapping;
+}
+
+void *etnaviv_gem_vmap(struct drm_gem_object *obj)
+{
+ struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+
+ if (etnaviv_obj->vaddr)
+ return etnaviv_obj->vaddr;
+
+ 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);
+ mutex_unlock(&etnaviv_obj->lock);
+
+ return etnaviv_obj->vaddr;
+}
+
+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));
+}
+
+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 drm_etnaviv_timespec *timeout)
+{
+ struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+ struct drm_device *dev = obj->dev;
+ bool write = !!(op & ETNA_PREP_WRITE);
+ int ret;
+
+ 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);
+ }
+
+ if (op & ETNA_PREP_NOSYNC) {
+ if (!dma_resv_test_signaled(obj->resv,
+ dma_resv_usage_rw(write)))
+ return -EBUSY;
+ } else {
+ unsigned long remain = etnaviv_timeout_to_jiffies(timeout);
+
+ ret = dma_resv_wait_timeout(obj->resv, dma_resv_usage_rw(write),
+ true, remain);
+ if (ret <= 0)
+ return ret == 0 ? -ETIMEDOUT : ret;
+ }
+
+ if (etnaviv_obj->flags & ETNA_BO_CACHED) {
+ dma_sync_sgtable_for_cpu(dev->dev, etnaviv_obj->sgt,
+ 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_sgtable_for_device(dev->dev, etnaviv_obj->sgt,
+ 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 drm_etnaviv_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
+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 dma_resv *robj = obj->resv;
+ unsigned long off = drm_vma_node_start(&obj->vma_node);
+ int r;
+
+ seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n",
+ etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I',
+ obj->name, kref_read(&obj->refcount),
+ off, etnaviv_obj->vaddr, obj->size);
+
+ r = dma_resv_lock(robj, NULL);
+ if (r)
+ return;
+
+ dma_resv_describe(robj, m);
+ dma_resv_unlock(robj);
+}
+
+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)
+{
+ vunmap(etnaviv_obj->vaddr);
+ 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,
+ .vmap = etnaviv_gem_vmap_impl,
+ .mmap = etnaviv_gem_mmap_obj,
+};
+
+void etnaviv_gem_free_object(struct drm_gem_object *obj)
+{
+ struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+ struct etnaviv_drm_private *priv = obj->dev->dev_private;
+ struct etnaviv_vram_mapping *mapping, *tmp;
+
+ /* object should not be active */
+ WARN_ON(is_active(etnaviv_obj));
+
+ mutex_lock(&priv->gem_lock);
+ list_del(&etnaviv_obj->gem_node);
+ mutex_unlock(&priv->gem_lock);
+
+ list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list,
+ obj_node) {
+ struct etnaviv_iommu_context *context = mapping->context;
+
+ WARN_ON(mapping->use);
+
+ if (context)
+ etnaviv_iommu_unmap_gem(context, mapping);
+
+ list_del(&mapping->obj_node);
+ kfree(mapping);
+ }
+
+ drm_gem_free_mmap_offset(obj);
+ etnaviv_obj->ops->release(etnaviv_obj);
+ drm_gem_object_release(obj);
+
+ kfree(etnaviv_obj);
+}
+
+void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj)
+{
+ 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 const struct vm_operations_struct vm_ops = {
+ .fault = etnaviv_gem_fault,
+ .open = drm_gem_vm_open,
+ .close = drm_gem_vm_close,
+};
+
+static const struct drm_gem_object_funcs etnaviv_gem_object_funcs = {
+ .free = etnaviv_gem_free_object,
+ .pin = etnaviv_gem_prime_pin,
+ .unpin = etnaviv_gem_prime_unpin,
+ .get_sg_table = etnaviv_gem_prime_get_sg_table,
+ .vmap = etnaviv_gem_prime_vmap,
+ .mmap = etnaviv_gem_mmap,
+ .vm_ops = &vm_ops,
+};
+
+static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags,
+ 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;
+
+ mutex_init(&etnaviv_obj->lock);
+ INIT_LIST_HEAD(&etnaviv_obj->vram_list);
+
+ *obj = &etnaviv_obj->base;
+ (*obj)->funcs = &etnaviv_gem_object_funcs;
+
+ return 0;
+}
+
+/* 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)
+{
+ struct etnaviv_drm_private *priv = dev->dev_private;
+ struct drm_gem_object *obj = NULL;
+ int ret;
+
+ size = PAGE_ALIGN(size);
+
+ ret = etnaviv_gem_new_impl(dev, size, flags,
+ &etnaviv_gem_shmem_ops, &obj);
+ if (ret)
+ goto fail;
+
+ lockdep_set_class(&to_etnaviv_bo(obj)->lock, &etnaviv_shm_lock_class);
+
+ ret = drm_gem_object_init(dev, obj, size);
+ if (ret)
+ goto fail;
+
+ /*
+ * Our buffers are kept pinned, so allocating them from the MOVABLE
+ * zone is a really bad idea, and conflicts with CMA. See comments
+ * above new_inode() why this is required _and_ expected if you're
+ * going to pin these pages.
+ */
+ mapping_set_gfp_mask(obj->filp->f_mapping, priv->shm_gfp_mask);
+
+ etnaviv_gem_obj_add(dev, obj);
+
+ ret = drm_gem_handle_create(file, obj, handle);
+
+ /* drop reference from allocate - handle holds it now */
+fail:
+ drm_gem_object_put(obj);
+
+ return ret;
+}
+
+int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
+ 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, 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;
+ struct etnaviv_gem_userptr *userptr = &etnaviv_obj->userptr;
+ int ret, pinned = 0, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
+
+ might_lock_read(&current->mm->mmap_lock);
+
+ if (userptr->mm != current->mm)
+ return -EPERM;
+
+ 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;
+
+ ret = pin_user_pages_fast(ptr, num_pages,
+ FOLL_WRITE | FOLL_FORCE | FOLL_LONGTERM,
+ pages);
+ if (ret < 0) {
+ unpin_user_pages(pvec, pinned);
+ kvfree(pvec);
+ return ret;
+ }
+
+ pinned += ret;
+
+ } while (pinned < npages);
+
+ etnaviv_obj->pages = pvec;
+
+ return 0;
+}
+
+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;
+
+ unpin_user_pages(etnaviv_obj->pages, npages);
+ kvfree(etnaviv_obj->pages);
+ }
+}
+
+static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
+ struct vm_area_struct *vma)
+{
+ return -EINVAL;
+}
+
+static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = {
+ .get_pages = etnaviv_gem_userptr_get_pages,
+ .release = etnaviv_gem_userptr_release,
+ .vmap = etnaviv_gem_vmap_impl,
+ .mmap = etnaviv_gem_userptr_mmap_obj,
+};
+
+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,
+ &etnaviv_gem_userptr_ops, &etnaviv_obj);
+ if (ret)
+ return ret;
+
+ lockdep_set_class(&etnaviv_obj->lock, &etnaviv_userptr_lock_class);
+
+ etnaviv_obj->userptr.ptr = ptr;
+ etnaviv_obj->userptr.mm = current->mm;
+ etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE);
+
+ etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
+
+ ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle);
+
+ /* drop reference from allocate - handle holds it now */
+ drm_gem_object_put(&etnaviv_obj->base);
+ return ret;
+}