![Emil Velikov](/assets/img/avatar_default.png)
Spelling out _unlocked for each and every driver is a annoying. Especially if we consider how many drivers, do not know (or need to) about the horror stories involving struct_mutex. Just drop the suffix. It makes the API cleaner. Done via the following script: __from=drm_gem_object_put_unlocked __to=drm_gem_object_put for __file in $(git grep --name-only $__from); do sed -i "s/$__from/$__to/g" $__file; done Cc: Qiang Yu <yuq825@gmail.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Signed-off-by: Emil Velikov <emil.velikov@collabora.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20200515095118.2743122-22-emil.l.velikov@gmail.com
415 lines
8.9 KiB
C
415 lines
8.9 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
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#include <linux/mm.h>
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#include <linux/sync_file.h>
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#include <linux/pagemap.h>
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#include <linux/shmem_fs.h>
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#include <linux/dma-mapping.h>
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#include <drm/drm_file.h>
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#include <drm/drm_syncobj.h>
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#include <drm/drm_utils.h>
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#include <drm/lima_drm.h>
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#include "lima_drv.h"
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#include "lima_gem.h"
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#include "lima_vm.h"
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int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)
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{
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struct page **pages;
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struct address_space *mapping = bo->base.base.filp->f_mapping;
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struct device *dev = bo->base.base.dev->dev;
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size_t old_size = bo->heap_size;
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size_t new_size = bo->heap_size ? bo->heap_size * 2 :
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(lima_heap_init_nr_pages << PAGE_SHIFT);
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struct sg_table sgt;
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int i, ret;
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if (bo->heap_size >= bo->base.base.size)
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return -ENOSPC;
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new_size = min(new_size, bo->base.base.size);
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mutex_lock(&bo->base.pages_lock);
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if (bo->base.pages) {
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pages = bo->base.pages;
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} else {
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pages = kvmalloc_array(bo->base.base.size >> PAGE_SHIFT,
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sizeof(*pages), GFP_KERNEL | __GFP_ZERO);
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if (!pages) {
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mutex_unlock(&bo->base.pages_lock);
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return -ENOMEM;
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}
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bo->base.pages = pages;
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bo->base.pages_use_count = 1;
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mapping_set_unevictable(mapping);
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}
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for (i = old_size >> PAGE_SHIFT; i < new_size >> PAGE_SHIFT; i++) {
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struct page *page = shmem_read_mapping_page(mapping, i);
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if (IS_ERR(page)) {
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mutex_unlock(&bo->base.pages_lock);
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return PTR_ERR(page);
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}
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pages[i] = page;
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}
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mutex_unlock(&bo->base.pages_lock);
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ret = sg_alloc_table_from_pages(&sgt, pages, i, 0,
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new_size, GFP_KERNEL);
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if (ret)
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return ret;
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if (bo->base.sgt) {
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dma_unmap_sg(dev, bo->base.sgt->sgl,
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bo->base.sgt->nents, DMA_BIDIRECTIONAL);
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sg_free_table(bo->base.sgt);
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} else {
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bo->base.sgt = kmalloc(sizeof(*bo->base.sgt), GFP_KERNEL);
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if (!bo->base.sgt) {
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sg_free_table(&sgt);
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return -ENOMEM;
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}
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}
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dma_map_sg(dev, sgt.sgl, sgt.nents, DMA_BIDIRECTIONAL);
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*bo->base.sgt = sgt;
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if (vm) {
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ret = lima_vm_map_bo(vm, bo, old_size >> PAGE_SHIFT);
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if (ret)
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return ret;
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}
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bo->heap_size = new_size;
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return 0;
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}
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int lima_gem_create_handle(struct drm_device *dev, struct drm_file *file,
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u32 size, u32 flags, u32 *handle)
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{
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int err;
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gfp_t mask;
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struct drm_gem_shmem_object *shmem;
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struct drm_gem_object *obj;
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struct lima_bo *bo;
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bool is_heap = flags & LIMA_BO_FLAG_HEAP;
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shmem = drm_gem_shmem_create(dev, size);
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if (IS_ERR(shmem))
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return PTR_ERR(shmem);
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obj = &shmem->base;
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/* Mali Utgard GPU can only support 32bit address space */
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mask = mapping_gfp_mask(obj->filp->f_mapping);
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mask &= ~__GFP_HIGHMEM;
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mask |= __GFP_DMA32;
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mapping_set_gfp_mask(obj->filp->f_mapping, mask);
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if (is_heap) {
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bo = to_lima_bo(obj);
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err = lima_heap_alloc(bo, NULL);
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if (err)
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goto out;
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} else {
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struct sg_table *sgt = drm_gem_shmem_get_pages_sgt(obj);
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if (IS_ERR(sgt)) {
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err = PTR_ERR(sgt);
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goto out;
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}
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}
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err = drm_gem_handle_create(file, obj, handle);
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out:
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/* drop reference from allocate - handle holds it now */
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drm_gem_object_put(obj);
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return err;
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}
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static void lima_gem_free_object(struct drm_gem_object *obj)
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{
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struct lima_bo *bo = to_lima_bo(obj);
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if (!list_empty(&bo->va))
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dev_err(obj->dev->dev, "lima gem free bo still has va\n");
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drm_gem_shmem_free_object(obj);
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}
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static int lima_gem_object_open(struct drm_gem_object *obj, struct drm_file *file)
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{
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struct lima_bo *bo = to_lima_bo(obj);
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struct lima_drm_priv *priv = to_lima_drm_priv(file);
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struct lima_vm *vm = priv->vm;
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return lima_vm_bo_add(vm, bo, true);
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}
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static void lima_gem_object_close(struct drm_gem_object *obj, struct drm_file *file)
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{
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struct lima_bo *bo = to_lima_bo(obj);
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struct lima_drm_priv *priv = to_lima_drm_priv(file);
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struct lima_vm *vm = priv->vm;
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lima_vm_bo_del(vm, bo);
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}
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static int lima_gem_pin(struct drm_gem_object *obj)
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{
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struct lima_bo *bo = to_lima_bo(obj);
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if (bo->heap_size)
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return -EINVAL;
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return drm_gem_shmem_pin(obj);
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}
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static void *lima_gem_vmap(struct drm_gem_object *obj)
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{
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struct lima_bo *bo = to_lima_bo(obj);
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if (bo->heap_size)
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return ERR_PTR(-EINVAL);
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return drm_gem_shmem_vmap(obj);
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}
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static int lima_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
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{
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struct lima_bo *bo = to_lima_bo(obj);
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if (bo->heap_size)
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return -EINVAL;
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return drm_gem_shmem_mmap(obj, vma);
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}
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static const struct drm_gem_object_funcs lima_gem_funcs = {
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.free = lima_gem_free_object,
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.open = lima_gem_object_open,
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.close = lima_gem_object_close,
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.print_info = drm_gem_shmem_print_info,
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.pin = lima_gem_pin,
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.unpin = drm_gem_shmem_unpin,
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.get_sg_table = drm_gem_shmem_get_sg_table,
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.vmap = lima_gem_vmap,
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.vunmap = drm_gem_shmem_vunmap,
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.mmap = lima_gem_mmap,
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};
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struct drm_gem_object *lima_gem_create_object(struct drm_device *dev, size_t size)
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{
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struct lima_bo *bo;
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bo = kzalloc(sizeof(*bo), GFP_KERNEL);
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if (!bo)
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return NULL;
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mutex_init(&bo->lock);
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INIT_LIST_HEAD(&bo->va);
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bo->base.base.funcs = &lima_gem_funcs;
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return &bo->base.base;
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}
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int lima_gem_get_info(struct drm_file *file, u32 handle, u32 *va, u64 *offset)
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{
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struct drm_gem_object *obj;
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struct lima_bo *bo;
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struct lima_drm_priv *priv = to_lima_drm_priv(file);
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struct lima_vm *vm = priv->vm;
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obj = drm_gem_object_lookup(file, handle);
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if (!obj)
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return -ENOENT;
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bo = to_lima_bo(obj);
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*va = lima_vm_get_va(vm, bo);
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*offset = drm_vma_node_offset_addr(&obj->vma_node);
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drm_gem_object_put(obj);
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return 0;
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}
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static int lima_gem_sync_bo(struct lima_sched_task *task, struct lima_bo *bo,
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bool write, bool explicit)
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{
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int err = 0;
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if (!write) {
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err = dma_resv_reserve_shared(lima_bo_resv(bo), 1);
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if (err)
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return err;
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}
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/* explicit sync use user passed dep fence */
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if (explicit)
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return 0;
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return drm_gem_fence_array_add_implicit(&task->deps, &bo->base.base, write);
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}
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static int lima_gem_add_deps(struct drm_file *file, struct lima_submit *submit)
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{
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int i, err;
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for (i = 0; i < ARRAY_SIZE(submit->in_sync); i++) {
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struct dma_fence *fence = NULL;
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if (!submit->in_sync[i])
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continue;
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err = drm_syncobj_find_fence(file, submit->in_sync[i],
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0, 0, &fence);
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if (err)
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return err;
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err = drm_gem_fence_array_add(&submit->task->deps, fence);
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if (err) {
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dma_fence_put(fence);
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return err;
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}
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}
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return 0;
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}
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int lima_gem_submit(struct drm_file *file, struct lima_submit *submit)
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{
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int i, err = 0;
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struct ww_acquire_ctx ctx;
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struct lima_drm_priv *priv = to_lima_drm_priv(file);
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struct lima_vm *vm = priv->vm;
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struct drm_syncobj *out_sync = NULL;
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struct dma_fence *fence;
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struct lima_bo **bos = submit->lbos;
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if (submit->out_sync) {
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out_sync = drm_syncobj_find(file, submit->out_sync);
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if (!out_sync)
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return -ENOENT;
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}
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for (i = 0; i < submit->nr_bos; i++) {
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struct drm_gem_object *obj;
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struct lima_bo *bo;
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obj = drm_gem_object_lookup(file, submit->bos[i].handle);
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if (!obj) {
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err = -ENOENT;
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goto err_out0;
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}
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bo = to_lima_bo(obj);
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/* increase refcnt of gpu va map to prevent unmapped when executing,
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* will be decreased when task done
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*/
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err = lima_vm_bo_add(vm, bo, false);
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if (err) {
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drm_gem_object_put(obj);
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goto err_out0;
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}
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bos[i] = bo;
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}
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err = drm_gem_lock_reservations((struct drm_gem_object **)bos,
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submit->nr_bos, &ctx);
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if (err)
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goto err_out0;
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err = lima_sched_task_init(
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submit->task, submit->ctx->context + submit->pipe,
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bos, submit->nr_bos, vm);
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if (err)
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goto err_out1;
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err = lima_gem_add_deps(file, submit);
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if (err)
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goto err_out2;
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for (i = 0; i < submit->nr_bos; i++) {
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err = lima_gem_sync_bo(
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submit->task, bos[i],
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submit->bos[i].flags & LIMA_SUBMIT_BO_WRITE,
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submit->flags & LIMA_SUBMIT_FLAG_EXPLICIT_FENCE);
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if (err)
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goto err_out2;
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}
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fence = lima_sched_context_queue_task(
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submit->ctx->context + submit->pipe, submit->task);
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for (i = 0; i < submit->nr_bos; i++) {
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if (submit->bos[i].flags & LIMA_SUBMIT_BO_WRITE)
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dma_resv_add_excl_fence(lima_bo_resv(bos[i]), fence);
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else
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dma_resv_add_shared_fence(lima_bo_resv(bos[i]), fence);
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}
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drm_gem_unlock_reservations((struct drm_gem_object **)bos,
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submit->nr_bos, &ctx);
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for (i = 0; i < submit->nr_bos; i++)
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drm_gem_object_put(&bos[i]->base.base);
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if (out_sync) {
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drm_syncobj_replace_fence(out_sync, fence);
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drm_syncobj_put(out_sync);
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}
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dma_fence_put(fence);
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return 0;
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err_out2:
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lima_sched_task_fini(submit->task);
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err_out1:
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drm_gem_unlock_reservations((struct drm_gem_object **)bos,
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submit->nr_bos, &ctx);
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err_out0:
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for (i = 0; i < submit->nr_bos; i++) {
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if (!bos[i])
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break;
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lima_vm_bo_del(vm, bos[i]);
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drm_gem_object_put(&bos[i]->base.base);
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}
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if (out_sync)
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drm_syncobj_put(out_sync);
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return err;
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}
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int lima_gem_wait(struct drm_file *file, u32 handle, u32 op, s64 timeout_ns)
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{
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bool write = op & LIMA_GEM_WAIT_WRITE;
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long ret, timeout;
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if (!op)
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return 0;
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timeout = drm_timeout_abs_to_jiffies(timeout_ns);
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ret = drm_gem_dma_resv_wait(file, handle, write, timeout);
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if (ret == -ETIME)
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ret = timeout ? -ETIMEDOUT : -EBUSY;
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return ret;
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}
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