![Dave Airlie](/assets/img/avatar_default.png)
I wrote this for the prime sharing work, but I also noticed other external non-upstream drivers from a large company carrying a similiar patch, so I may as well ship it in master. Signed-off-by: Dave Airlie <airlied@redhat.com>
1846 lines
45 KiB
C
1846 lines
45 KiB
C
/**************************************************************************
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*
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* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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*/
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/* Notes:
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*
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* We store bo pointer in drm_mm_node struct so we know which bo own a
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* specific node. There is no protection on the pointer, thus to make
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* sure things don't go berserk you have to access this pointer while
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* holding the global lru lock and make sure anytime you free a node you
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* reset the pointer to NULL.
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*/
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#include "ttm/ttm_module.h"
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#include "ttm/ttm_bo_driver.h"
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#include "ttm/ttm_placement.h"
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#include <linux/jiffies.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/file.h>
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#include <linux/module.h>
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#define TTM_ASSERT_LOCKED(param)
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#define TTM_DEBUG(fmt, arg...)
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#define TTM_BO_HASH_ORDER 13
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static int ttm_bo_setup_vm(struct ttm_buffer_object *bo);
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static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
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static void ttm_bo_global_kobj_release(struct kobject *kobj);
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static struct attribute ttm_bo_count = {
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.name = "bo_count",
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.mode = S_IRUGO
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};
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static inline int ttm_mem_type_from_flags(uint32_t flags, uint32_t *mem_type)
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{
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int i;
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for (i = 0; i <= TTM_PL_PRIV5; i++)
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if (flags & (1 << i)) {
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*mem_type = i;
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return 0;
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}
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return -EINVAL;
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}
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static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
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{
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struct ttm_mem_type_manager *man = &bdev->man[mem_type];
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printk(KERN_ERR TTM_PFX " has_type: %d\n", man->has_type);
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printk(KERN_ERR TTM_PFX " use_type: %d\n", man->use_type);
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printk(KERN_ERR TTM_PFX " flags: 0x%08X\n", man->flags);
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printk(KERN_ERR TTM_PFX " gpu_offset: 0x%08lX\n", man->gpu_offset);
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printk(KERN_ERR TTM_PFX " size: %llu\n", man->size);
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printk(KERN_ERR TTM_PFX " available_caching: 0x%08X\n",
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man->available_caching);
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printk(KERN_ERR TTM_PFX " default_caching: 0x%08X\n",
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man->default_caching);
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if (mem_type != TTM_PL_SYSTEM) {
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spin_lock(&bdev->glob->lru_lock);
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drm_mm_debug_table(&man->manager, TTM_PFX);
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spin_unlock(&bdev->glob->lru_lock);
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}
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}
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static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
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struct ttm_placement *placement)
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{
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int i, ret, mem_type;
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printk(KERN_ERR TTM_PFX "No space for %p (%lu pages, %luK, %luM)\n",
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bo, bo->mem.num_pages, bo->mem.size >> 10,
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bo->mem.size >> 20);
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for (i = 0; i < placement->num_placement; i++) {
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ret = ttm_mem_type_from_flags(placement->placement[i],
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&mem_type);
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if (ret)
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return;
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printk(KERN_ERR TTM_PFX " placement[%d]=0x%08X (%d)\n",
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i, placement->placement[i], mem_type);
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ttm_mem_type_debug(bo->bdev, mem_type);
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}
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}
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static ssize_t ttm_bo_global_show(struct kobject *kobj,
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struct attribute *attr,
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char *buffer)
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{
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struct ttm_bo_global *glob =
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container_of(kobj, struct ttm_bo_global, kobj);
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return snprintf(buffer, PAGE_SIZE, "%lu\n",
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(unsigned long) atomic_read(&glob->bo_count));
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}
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static struct attribute *ttm_bo_global_attrs[] = {
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&ttm_bo_count,
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NULL
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};
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static const struct sysfs_ops ttm_bo_global_ops = {
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.show = &ttm_bo_global_show
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};
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static struct kobj_type ttm_bo_glob_kobj_type = {
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.release = &ttm_bo_global_kobj_release,
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.sysfs_ops = &ttm_bo_global_ops,
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.default_attrs = ttm_bo_global_attrs
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};
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static inline uint32_t ttm_bo_type_flags(unsigned type)
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{
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return 1 << (type);
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}
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static void ttm_bo_release_list(struct kref *list_kref)
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{
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struct ttm_buffer_object *bo =
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container_of(list_kref, struct ttm_buffer_object, list_kref);
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struct ttm_bo_device *bdev = bo->bdev;
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BUG_ON(atomic_read(&bo->list_kref.refcount));
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BUG_ON(atomic_read(&bo->kref.refcount));
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BUG_ON(atomic_read(&bo->cpu_writers));
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BUG_ON(bo->sync_obj != NULL);
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BUG_ON(bo->mem.mm_node != NULL);
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BUG_ON(!list_empty(&bo->lru));
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BUG_ON(!list_empty(&bo->ddestroy));
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if (bo->ttm)
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ttm_tt_destroy(bo->ttm);
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atomic_dec(&bo->glob->bo_count);
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if (bo->destroy)
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bo->destroy(bo);
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else {
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ttm_mem_global_free(bdev->glob->mem_glob, bo->acc_size);
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kfree(bo);
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}
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}
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int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, bool interruptible)
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{
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if (interruptible) {
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int ret = 0;
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ret = wait_event_interruptible(bo->event_queue,
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atomic_read(&bo->reserved) == 0);
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if (unlikely(ret != 0))
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return ret;
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} else {
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wait_event(bo->event_queue, atomic_read(&bo->reserved) == 0);
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}
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return 0;
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}
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EXPORT_SYMBOL(ttm_bo_wait_unreserved);
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static void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_mem_type_manager *man;
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BUG_ON(!atomic_read(&bo->reserved));
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if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
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BUG_ON(!list_empty(&bo->lru));
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man = &bdev->man[bo->mem.mem_type];
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list_add_tail(&bo->lru, &man->lru);
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kref_get(&bo->list_kref);
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if (bo->ttm != NULL) {
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list_add_tail(&bo->swap, &bo->glob->swap_lru);
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kref_get(&bo->list_kref);
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}
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}
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}
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/**
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* Call with the lru_lock held.
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*/
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static int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
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{
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int put_count = 0;
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if (!list_empty(&bo->swap)) {
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list_del_init(&bo->swap);
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++put_count;
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}
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if (!list_empty(&bo->lru)) {
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list_del_init(&bo->lru);
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++put_count;
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}
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/*
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* TODO: Add a driver hook to delete from
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* driver-specific LRU's here.
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*/
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return put_count;
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}
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int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
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bool interruptible,
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bool no_wait, bool use_sequence, uint32_t sequence)
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{
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struct ttm_bo_global *glob = bo->glob;
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int ret;
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while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) {
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if (use_sequence && bo->seq_valid &&
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(sequence - bo->val_seq < (1 << 31))) {
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return -EAGAIN;
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}
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if (no_wait)
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return -EBUSY;
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spin_unlock(&glob->lru_lock);
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ret = ttm_bo_wait_unreserved(bo, interruptible);
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spin_lock(&glob->lru_lock);
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if (unlikely(ret))
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return ret;
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}
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if (use_sequence) {
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bo->val_seq = sequence;
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bo->seq_valid = true;
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} else {
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bo->seq_valid = false;
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}
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return 0;
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}
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EXPORT_SYMBOL(ttm_bo_reserve);
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static void ttm_bo_ref_bug(struct kref *list_kref)
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{
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BUG();
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}
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int ttm_bo_reserve(struct ttm_buffer_object *bo,
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bool interruptible,
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bool no_wait, bool use_sequence, uint32_t sequence)
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{
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struct ttm_bo_global *glob = bo->glob;
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int put_count = 0;
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int ret;
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spin_lock(&glob->lru_lock);
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ret = ttm_bo_reserve_locked(bo, interruptible, no_wait, use_sequence,
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sequence);
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if (likely(ret == 0))
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put_count = ttm_bo_del_from_lru(bo);
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spin_unlock(&glob->lru_lock);
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while (put_count--)
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kref_put(&bo->list_kref, ttm_bo_ref_bug);
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return ret;
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}
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void ttm_bo_unreserve(struct ttm_buffer_object *bo)
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{
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struct ttm_bo_global *glob = bo->glob;
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spin_lock(&glob->lru_lock);
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ttm_bo_add_to_lru(bo);
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atomic_set(&bo->reserved, 0);
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wake_up_all(&bo->event_queue);
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spin_unlock(&glob->lru_lock);
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}
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EXPORT_SYMBOL(ttm_bo_unreserve);
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/*
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* Call bo->mutex locked.
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*/
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static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_global *glob = bo->glob;
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int ret = 0;
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uint32_t page_flags = 0;
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TTM_ASSERT_LOCKED(&bo->mutex);
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bo->ttm = NULL;
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if (bdev->need_dma32)
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page_flags |= TTM_PAGE_FLAG_DMA32;
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switch (bo->type) {
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case ttm_bo_type_device:
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if (zero_alloc)
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page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
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case ttm_bo_type_kernel:
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bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
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page_flags, glob->dummy_read_page);
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if (unlikely(bo->ttm == NULL))
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ret = -ENOMEM;
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break;
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case ttm_bo_type_user:
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bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
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page_flags | TTM_PAGE_FLAG_USER,
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glob->dummy_read_page);
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if (unlikely(bo->ttm == NULL)) {
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ret = -ENOMEM;
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break;
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}
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ret = ttm_tt_set_user(bo->ttm, current,
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bo->buffer_start, bo->num_pages);
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if (unlikely(ret != 0))
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ttm_tt_destroy(bo->ttm);
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break;
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default:
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printk(KERN_ERR TTM_PFX "Illegal buffer object type\n");
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
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struct ttm_mem_reg *mem,
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bool evict, bool interruptible,
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bool no_wait_reserve, bool no_wait_gpu)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
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bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
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struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
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struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
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int ret = 0;
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if (old_is_pci || new_is_pci ||
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((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0))
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ttm_bo_unmap_virtual(bo);
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/*
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* Create and bind a ttm if required.
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*/
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if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) {
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ret = ttm_bo_add_ttm(bo, false);
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if (ret)
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goto out_err;
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ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
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if (ret)
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goto out_err;
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if (mem->mem_type != TTM_PL_SYSTEM) {
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ret = ttm_tt_bind(bo->ttm, mem);
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if (ret)
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goto out_err;
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}
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if (bo->mem.mem_type == TTM_PL_SYSTEM) {
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bo->mem = *mem;
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mem->mm_node = NULL;
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goto moved;
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}
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}
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if (bdev->driver->move_notify)
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bdev->driver->move_notify(bo, mem);
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if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
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!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
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ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem);
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else if (bdev->driver->move)
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ret = bdev->driver->move(bo, evict, interruptible,
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no_wait_reserve, no_wait_gpu, mem);
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else
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ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem);
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if (ret)
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goto out_err;
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moved:
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if (bo->evicted) {
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ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
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if (ret)
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printk(KERN_ERR TTM_PFX "Can not flush read caches\n");
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bo->evicted = false;
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}
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if (bo->mem.mm_node) {
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spin_lock(&bo->lock);
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bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) +
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bdev->man[bo->mem.mem_type].gpu_offset;
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bo->cur_placement = bo->mem.placement;
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spin_unlock(&bo->lock);
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} else
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bo->offset = 0;
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|
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return 0;
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|
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out_err:
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new_man = &bdev->man[bo->mem.mem_type];
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if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
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ttm_tt_unbind(bo->ttm);
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ttm_tt_destroy(bo->ttm);
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bo->ttm = NULL;
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}
|
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|
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return ret;
|
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}
|
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|
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/**
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* If bo idle, remove from delayed- and lru lists, and unref.
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* If not idle, and already on delayed list, do nothing.
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* If not idle, and not on delayed list, put on delayed list,
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* up the list_kref and schedule a delayed list check.
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*/
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|
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static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
|
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{
|
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_global *glob = bo->glob;
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struct ttm_bo_driver *driver = bdev->driver;
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int ret;
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|
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spin_lock(&bo->lock);
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(void) ttm_bo_wait(bo, false, false, !remove_all);
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|
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if (!bo->sync_obj) {
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int put_count;
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spin_unlock(&bo->lock);
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spin_lock(&glob->lru_lock);
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put_count = ttm_bo_del_from_lru(bo);
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ret = ttm_bo_reserve_locked(bo, false, false, false, 0);
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BUG_ON(ret);
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if (bo->ttm)
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ttm_tt_unbind(bo->ttm);
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|
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if (!list_empty(&bo->ddestroy)) {
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list_del_init(&bo->ddestroy);
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++put_count;
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}
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if (bo->mem.mm_node) {
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drm_mm_put_block(bo->mem.mm_node);
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bo->mem.mm_node = NULL;
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}
|
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spin_unlock(&glob->lru_lock);
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|
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atomic_set(&bo->reserved, 0);
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|
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while (put_count--)
|
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kref_put(&bo->list_kref, ttm_bo_ref_bug);
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return 0;
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}
|
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|
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spin_lock(&glob->lru_lock);
|
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if (list_empty(&bo->ddestroy)) {
|
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void *sync_obj = bo->sync_obj;
|
|
void *sync_obj_arg = bo->sync_obj_arg;
|
|
|
|
kref_get(&bo->list_kref);
|
|
list_add_tail(&bo->ddestroy, &bdev->ddestroy);
|
|
spin_unlock(&glob->lru_lock);
|
|
spin_unlock(&bo->lock);
|
|
|
|
if (sync_obj)
|
|
driver->sync_obj_flush(sync_obj, sync_obj_arg);
|
|
schedule_delayed_work(&bdev->wq,
|
|
((HZ / 100) < 1) ? 1 : HZ / 100);
|
|
ret = 0;
|
|
|
|
} else {
|
|
spin_unlock(&glob->lru_lock);
|
|
spin_unlock(&bo->lock);
|
|
ret = -EBUSY;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Traverse the delayed list, and call ttm_bo_cleanup_refs on all
|
|
* encountered buffers.
|
|
*/
|
|
|
|
static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
|
|
{
|
|
struct ttm_bo_global *glob = bdev->glob;
|
|
struct ttm_buffer_object *entry = NULL;
|
|
int ret = 0;
|
|
|
|
spin_lock(&glob->lru_lock);
|
|
if (list_empty(&bdev->ddestroy))
|
|
goto out_unlock;
|
|
|
|
entry = list_first_entry(&bdev->ddestroy,
|
|
struct ttm_buffer_object, ddestroy);
|
|
kref_get(&entry->list_kref);
|
|
|
|
for (;;) {
|
|
struct ttm_buffer_object *nentry = NULL;
|
|
|
|
if (entry->ddestroy.next != &bdev->ddestroy) {
|
|
nentry = list_first_entry(&entry->ddestroy,
|
|
struct ttm_buffer_object, ddestroy);
|
|
kref_get(&nentry->list_kref);
|
|
}
|
|
|
|
spin_unlock(&glob->lru_lock);
|
|
ret = ttm_bo_cleanup_refs(entry, remove_all);
|
|
kref_put(&entry->list_kref, ttm_bo_release_list);
|
|
entry = nentry;
|
|
|
|
if (ret || !entry)
|
|
goto out;
|
|
|
|
spin_lock(&glob->lru_lock);
|
|
if (list_empty(&entry->ddestroy))
|
|
break;
|
|
}
|
|
|
|
out_unlock:
|
|
spin_unlock(&glob->lru_lock);
|
|
out:
|
|
if (entry)
|
|
kref_put(&entry->list_kref, ttm_bo_release_list);
|
|
return ret;
|
|
}
|
|
|
|
static void ttm_bo_delayed_workqueue(struct work_struct *work)
|
|
{
|
|
struct ttm_bo_device *bdev =
|
|
container_of(work, struct ttm_bo_device, wq.work);
|
|
|
|
if (ttm_bo_delayed_delete(bdev, false)) {
|
|
schedule_delayed_work(&bdev->wq,
|
|
((HZ / 100) < 1) ? 1 : HZ / 100);
|
|
}
|
|
}
|
|
|
|
static void ttm_bo_release(struct kref *kref)
|
|
{
|
|
struct ttm_buffer_object *bo =
|
|
container_of(kref, struct ttm_buffer_object, kref);
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
|
|
if (likely(bo->vm_node != NULL)) {
|
|
rb_erase(&bo->vm_rb, &bdev->addr_space_rb);
|
|
drm_mm_put_block(bo->vm_node);
|
|
bo->vm_node = NULL;
|
|
}
|
|
write_unlock(&bdev->vm_lock);
|
|
ttm_bo_cleanup_refs(bo, false);
|
|
kref_put(&bo->list_kref, ttm_bo_release_list);
|
|
write_lock(&bdev->vm_lock);
|
|
}
|
|
|
|
void ttm_bo_unref(struct ttm_buffer_object **p_bo)
|
|
{
|
|
struct ttm_buffer_object *bo = *p_bo;
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
|
|
*p_bo = NULL;
|
|
write_lock(&bdev->vm_lock);
|
|
kref_put(&bo->kref, ttm_bo_release);
|
|
write_unlock(&bdev->vm_lock);
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_unref);
|
|
|
|
int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
|
|
{
|
|
return cancel_delayed_work_sync(&bdev->wq);
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);
|
|
|
|
void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
|
|
{
|
|
if (resched)
|
|
schedule_delayed_work(&bdev->wq,
|
|
((HZ / 100) < 1) ? 1 : HZ / 100);
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue);
|
|
|
|
static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
|
|
bool no_wait_reserve, bool no_wait_gpu)
|
|
{
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
struct ttm_bo_global *glob = bo->glob;
|
|
struct ttm_mem_reg evict_mem;
|
|
struct ttm_placement placement;
|
|
int ret = 0;
|
|
|
|
spin_lock(&bo->lock);
|
|
ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
|
|
spin_unlock(&bo->lock);
|
|
|
|
if (unlikely(ret != 0)) {
|
|
if (ret != -ERESTARTSYS) {
|
|
printk(KERN_ERR TTM_PFX
|
|
"Failed to expire sync object before "
|
|
"buffer eviction.\n");
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
BUG_ON(!atomic_read(&bo->reserved));
|
|
|
|
evict_mem = bo->mem;
|
|
evict_mem.mm_node = NULL;
|
|
evict_mem.bus.io_reserved = false;
|
|
|
|
placement.fpfn = 0;
|
|
placement.lpfn = 0;
|
|
placement.num_placement = 0;
|
|
placement.num_busy_placement = 0;
|
|
bdev->driver->evict_flags(bo, &placement);
|
|
ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
|
|
no_wait_reserve, no_wait_gpu);
|
|
if (ret) {
|
|
if (ret != -ERESTARTSYS) {
|
|
printk(KERN_ERR TTM_PFX
|
|
"Failed to find memory space for "
|
|
"buffer 0x%p eviction.\n", bo);
|
|
ttm_bo_mem_space_debug(bo, &placement);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible,
|
|
no_wait_reserve, no_wait_gpu);
|
|
if (ret) {
|
|
if (ret != -ERESTARTSYS)
|
|
printk(KERN_ERR TTM_PFX "Buffer eviction failed\n");
|
|
spin_lock(&glob->lru_lock);
|
|
if (evict_mem.mm_node) {
|
|
drm_mm_put_block(evict_mem.mm_node);
|
|
evict_mem.mm_node = NULL;
|
|
}
|
|
spin_unlock(&glob->lru_lock);
|
|
goto out;
|
|
}
|
|
bo->evicted = true;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
|
|
uint32_t mem_type,
|
|
bool interruptible, bool no_wait_reserve,
|
|
bool no_wait_gpu)
|
|
{
|
|
struct ttm_bo_global *glob = bdev->glob;
|
|
struct ttm_mem_type_manager *man = &bdev->man[mem_type];
|
|
struct ttm_buffer_object *bo;
|
|
int ret, put_count = 0;
|
|
|
|
retry:
|
|
spin_lock(&glob->lru_lock);
|
|
if (list_empty(&man->lru)) {
|
|
spin_unlock(&glob->lru_lock);
|
|
return -EBUSY;
|
|
}
|
|
|
|
bo = list_first_entry(&man->lru, struct ttm_buffer_object, lru);
|
|
kref_get(&bo->list_kref);
|
|
|
|
ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0);
|
|
|
|
if (unlikely(ret == -EBUSY)) {
|
|
spin_unlock(&glob->lru_lock);
|
|
if (likely(!no_wait_gpu))
|
|
ret = ttm_bo_wait_unreserved(bo, interruptible);
|
|
|
|
kref_put(&bo->list_kref, ttm_bo_release_list);
|
|
|
|
/**
|
|
* We *need* to retry after releasing the lru lock.
|
|
*/
|
|
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
goto retry;
|
|
}
|
|
|
|
put_count = ttm_bo_del_from_lru(bo);
|
|
spin_unlock(&glob->lru_lock);
|
|
|
|
BUG_ON(ret != 0);
|
|
|
|
while (put_count--)
|
|
kref_put(&bo->list_kref, ttm_bo_ref_bug);
|
|
|
|
ret = ttm_bo_evict(bo, interruptible, no_wait_reserve, no_wait_gpu);
|
|
ttm_bo_unreserve(bo);
|
|
|
|
kref_put(&bo->list_kref, ttm_bo_release_list);
|
|
return ret;
|
|
}
|
|
|
|
static int ttm_bo_man_get_node(struct ttm_buffer_object *bo,
|
|
struct ttm_mem_type_manager *man,
|
|
struct ttm_placement *placement,
|
|
struct ttm_mem_reg *mem,
|
|
struct drm_mm_node **node)
|
|
{
|
|
struct ttm_bo_global *glob = bo->glob;
|
|
unsigned long lpfn;
|
|
int ret;
|
|
|
|
lpfn = placement->lpfn;
|
|
if (!lpfn)
|
|
lpfn = man->size;
|
|
*node = NULL;
|
|
do {
|
|
ret = drm_mm_pre_get(&man->manager);
|
|
if (unlikely(ret))
|
|
return ret;
|
|
|
|
spin_lock(&glob->lru_lock);
|
|
*node = drm_mm_search_free_in_range(&man->manager,
|
|
mem->num_pages, mem->page_alignment,
|
|
placement->fpfn, lpfn, 1);
|
|
if (unlikely(*node == NULL)) {
|
|
spin_unlock(&glob->lru_lock);
|
|
return 0;
|
|
}
|
|
*node = drm_mm_get_block_atomic_range(*node, mem->num_pages,
|
|
mem->page_alignment,
|
|
placement->fpfn,
|
|
lpfn);
|
|
spin_unlock(&glob->lru_lock);
|
|
} while (*node == NULL);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Repeatedly evict memory from the LRU for @mem_type until we create enough
|
|
* space, or we've evicted everything and there isn't enough space.
|
|
*/
|
|
static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
|
|
uint32_t mem_type,
|
|
struct ttm_placement *placement,
|
|
struct ttm_mem_reg *mem,
|
|
bool interruptible,
|
|
bool no_wait_reserve,
|
|
bool no_wait_gpu)
|
|
{
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
struct ttm_bo_global *glob = bdev->glob;
|
|
struct ttm_mem_type_manager *man = &bdev->man[mem_type];
|
|
struct drm_mm_node *node;
|
|
int ret;
|
|
|
|
do {
|
|
ret = ttm_bo_man_get_node(bo, man, placement, mem, &node);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
if (node)
|
|
break;
|
|
spin_lock(&glob->lru_lock);
|
|
if (list_empty(&man->lru)) {
|
|
spin_unlock(&glob->lru_lock);
|
|
break;
|
|
}
|
|
spin_unlock(&glob->lru_lock);
|
|
ret = ttm_mem_evict_first(bdev, mem_type, interruptible,
|
|
no_wait_reserve, no_wait_gpu);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
} while (1);
|
|
if (node == NULL)
|
|
return -ENOMEM;
|
|
mem->mm_node = node;
|
|
mem->mem_type = mem_type;
|
|
return 0;
|
|
}
|
|
|
|
static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
|
|
uint32_t cur_placement,
|
|
uint32_t proposed_placement)
|
|
{
|
|
uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
|
|
uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
|
|
|
|
/**
|
|
* Keep current caching if possible.
|
|
*/
|
|
|
|
if ((cur_placement & caching) != 0)
|
|
result |= (cur_placement & caching);
|
|
else if ((man->default_caching & caching) != 0)
|
|
result |= man->default_caching;
|
|
else if ((TTM_PL_FLAG_CACHED & caching) != 0)
|
|
result |= TTM_PL_FLAG_CACHED;
|
|
else if ((TTM_PL_FLAG_WC & caching) != 0)
|
|
result |= TTM_PL_FLAG_WC;
|
|
else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
|
|
result |= TTM_PL_FLAG_UNCACHED;
|
|
|
|
return result;
|
|
}
|
|
|
|
static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
|
|
bool disallow_fixed,
|
|
uint32_t mem_type,
|
|
uint32_t proposed_placement,
|
|
uint32_t *masked_placement)
|
|
{
|
|
uint32_t cur_flags = ttm_bo_type_flags(mem_type);
|
|
|
|
if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed)
|
|
return false;
|
|
|
|
if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0)
|
|
return false;
|
|
|
|
if ((proposed_placement & man->available_caching) == 0)
|
|
return false;
|
|
|
|
cur_flags |= (proposed_placement & man->available_caching);
|
|
|
|
*masked_placement = cur_flags;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Creates space for memory region @mem according to its type.
|
|
*
|
|
* This function first searches for free space in compatible memory types in
|
|
* the priority order defined by the driver. If free space isn't found, then
|
|
* ttm_bo_mem_force_space is attempted in priority order to evict and find
|
|
* space.
|
|
*/
|
|
int ttm_bo_mem_space(struct ttm_buffer_object *bo,
|
|
struct ttm_placement *placement,
|
|
struct ttm_mem_reg *mem,
|
|
bool interruptible, bool no_wait_reserve,
|
|
bool no_wait_gpu)
|
|
{
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
struct ttm_mem_type_manager *man;
|
|
uint32_t mem_type = TTM_PL_SYSTEM;
|
|
uint32_t cur_flags = 0;
|
|
bool type_found = false;
|
|
bool type_ok = false;
|
|
bool has_erestartsys = false;
|
|
struct drm_mm_node *node = NULL;
|
|
int i, ret;
|
|
|
|
mem->mm_node = NULL;
|
|
for (i = 0; i < placement->num_placement; ++i) {
|
|
ret = ttm_mem_type_from_flags(placement->placement[i],
|
|
&mem_type);
|
|
if (ret)
|
|
return ret;
|
|
man = &bdev->man[mem_type];
|
|
|
|
type_ok = ttm_bo_mt_compatible(man,
|
|
bo->type == ttm_bo_type_user,
|
|
mem_type,
|
|
placement->placement[i],
|
|
&cur_flags);
|
|
|
|
if (!type_ok)
|
|
continue;
|
|
|
|
cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
|
|
cur_flags);
|
|
/*
|
|
* Use the access and other non-mapping-related flag bits from
|
|
* the memory placement flags to the current flags
|
|
*/
|
|
ttm_flag_masked(&cur_flags, placement->placement[i],
|
|
~TTM_PL_MASK_MEMTYPE);
|
|
|
|
if (mem_type == TTM_PL_SYSTEM)
|
|
break;
|
|
|
|
if (man->has_type && man->use_type) {
|
|
type_found = true;
|
|
ret = ttm_bo_man_get_node(bo, man, placement, mem,
|
|
&node);
|
|
if (unlikely(ret))
|
|
return ret;
|
|
}
|
|
if (node)
|
|
break;
|
|
}
|
|
|
|
if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || node) {
|
|
mem->mm_node = node;
|
|
mem->mem_type = mem_type;
|
|
mem->placement = cur_flags;
|
|
return 0;
|
|
}
|
|
|
|
if (!type_found)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < placement->num_busy_placement; ++i) {
|
|
ret = ttm_mem_type_from_flags(placement->busy_placement[i],
|
|
&mem_type);
|
|
if (ret)
|
|
return ret;
|
|
man = &bdev->man[mem_type];
|
|
if (!man->has_type)
|
|
continue;
|
|
if (!ttm_bo_mt_compatible(man,
|
|
bo->type == ttm_bo_type_user,
|
|
mem_type,
|
|
placement->busy_placement[i],
|
|
&cur_flags))
|
|
continue;
|
|
|
|
cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
|
|
cur_flags);
|
|
/*
|
|
* Use the access and other non-mapping-related flag bits from
|
|
* the memory placement flags to the current flags
|
|
*/
|
|
ttm_flag_masked(&cur_flags, placement->busy_placement[i],
|
|
~TTM_PL_MASK_MEMTYPE);
|
|
|
|
|
|
if (mem_type == TTM_PL_SYSTEM) {
|
|
mem->mem_type = mem_type;
|
|
mem->placement = cur_flags;
|
|
mem->mm_node = NULL;
|
|
return 0;
|
|
}
|
|
|
|
ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem,
|
|
interruptible, no_wait_reserve, no_wait_gpu);
|
|
if (ret == 0 && mem->mm_node) {
|
|
mem->placement = cur_flags;
|
|
return 0;
|
|
}
|
|
if (ret == -ERESTARTSYS)
|
|
has_erestartsys = true;
|
|
}
|
|
ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_mem_space);
|
|
|
|
int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait)
|
|
{
|
|
if ((atomic_read(&bo->cpu_writers) > 0) && no_wait)
|
|
return -EBUSY;
|
|
|
|
return wait_event_interruptible(bo->event_queue,
|
|
atomic_read(&bo->cpu_writers) == 0);
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_wait_cpu);
|
|
|
|
int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
|
|
struct ttm_placement *placement,
|
|
bool interruptible, bool no_wait_reserve,
|
|
bool no_wait_gpu)
|
|
{
|
|
struct ttm_bo_global *glob = bo->glob;
|
|
int ret = 0;
|
|
struct ttm_mem_reg mem;
|
|
|
|
BUG_ON(!atomic_read(&bo->reserved));
|
|
|
|
/*
|
|
* FIXME: It's possible to pipeline buffer moves.
|
|
* Have the driver move function wait for idle when necessary,
|
|
* instead of doing it here.
|
|
*/
|
|
spin_lock(&bo->lock);
|
|
ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
|
|
spin_unlock(&bo->lock);
|
|
if (ret)
|
|
return ret;
|
|
mem.num_pages = bo->num_pages;
|
|
mem.size = mem.num_pages << PAGE_SHIFT;
|
|
mem.page_alignment = bo->mem.page_alignment;
|
|
mem.bus.io_reserved = false;
|
|
/*
|
|
* Determine where to move the buffer.
|
|
*/
|
|
ret = ttm_bo_mem_space(bo, placement, &mem, interruptible, no_wait_reserve, no_wait_gpu);
|
|
if (ret)
|
|
goto out_unlock;
|
|
ret = ttm_bo_handle_move_mem(bo, &mem, false, interruptible, no_wait_reserve, no_wait_gpu);
|
|
out_unlock:
|
|
if (ret && mem.mm_node) {
|
|
spin_lock(&glob->lru_lock);
|
|
drm_mm_put_block(mem.mm_node);
|
|
spin_unlock(&glob->lru_lock);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int ttm_bo_mem_compat(struct ttm_placement *placement,
|
|
struct ttm_mem_reg *mem)
|
|
{
|
|
int i;
|
|
struct drm_mm_node *node = mem->mm_node;
|
|
|
|
if (node && placement->lpfn != 0 &&
|
|
(node->start < placement->fpfn ||
|
|
node->start + node->size > placement->lpfn))
|
|
return -1;
|
|
|
|
for (i = 0; i < placement->num_placement; i++) {
|
|
if ((placement->placement[i] & mem->placement &
|
|
TTM_PL_MASK_CACHING) &&
|
|
(placement->placement[i] & mem->placement &
|
|
TTM_PL_MASK_MEM))
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
int ttm_bo_validate(struct ttm_buffer_object *bo,
|
|
struct ttm_placement *placement,
|
|
bool interruptible, bool no_wait_reserve,
|
|
bool no_wait_gpu)
|
|
{
|
|
int ret;
|
|
|
|
BUG_ON(!atomic_read(&bo->reserved));
|
|
/* Check that range is valid */
|
|
if (placement->lpfn || placement->fpfn)
|
|
if (placement->fpfn > placement->lpfn ||
|
|
(placement->lpfn - placement->fpfn) < bo->num_pages)
|
|
return -EINVAL;
|
|
/*
|
|
* Check whether we need to move buffer.
|
|
*/
|
|
ret = ttm_bo_mem_compat(placement, &bo->mem);
|
|
if (ret < 0) {
|
|
ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu);
|
|
if (ret)
|
|
return ret;
|
|
} else {
|
|
/*
|
|
* Use the access and other non-mapping-related flag bits from
|
|
* the compatible memory placement flags to the active flags
|
|
*/
|
|
ttm_flag_masked(&bo->mem.placement, placement->placement[ret],
|
|
~TTM_PL_MASK_MEMTYPE);
|
|
}
|
|
/*
|
|
* We might need to add a TTM.
|
|
*/
|
|
if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
|
|
ret = ttm_bo_add_ttm(bo, true);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_validate);
|
|
|
|
int ttm_bo_check_placement(struct ttm_buffer_object *bo,
|
|
struct ttm_placement *placement)
|
|
{
|
|
int i;
|
|
|
|
if (placement->fpfn || placement->lpfn) {
|
|
if (bo->mem.num_pages > (placement->lpfn - placement->fpfn)) {
|
|
printk(KERN_ERR TTM_PFX "Page number range to small "
|
|
"Need %lu pages, range is [%u, %u]\n",
|
|
bo->mem.num_pages, placement->fpfn,
|
|
placement->lpfn);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
for (i = 0; i < placement->num_placement; i++) {
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
if (placement->placement[i] & TTM_PL_FLAG_NO_EVICT) {
|
|
printk(KERN_ERR TTM_PFX "Need to be root to "
|
|
"modify NO_EVICT status.\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
}
|
|
for (i = 0; i < placement->num_busy_placement; i++) {
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
if (placement->busy_placement[i] & TTM_PL_FLAG_NO_EVICT) {
|
|
printk(KERN_ERR TTM_PFX "Need to be root to "
|
|
"modify NO_EVICT status.\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ttm_bo_init(struct ttm_bo_device *bdev,
|
|
struct ttm_buffer_object *bo,
|
|
unsigned long size,
|
|
enum ttm_bo_type type,
|
|
struct ttm_placement *placement,
|
|
uint32_t page_alignment,
|
|
unsigned long buffer_start,
|
|
bool interruptible,
|
|
struct file *persistant_swap_storage,
|
|
size_t acc_size,
|
|
void (*destroy) (struct ttm_buffer_object *))
|
|
{
|
|
int ret = 0;
|
|
unsigned long num_pages;
|
|
|
|
size += buffer_start & ~PAGE_MASK;
|
|
num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
|
if (num_pages == 0) {
|
|
printk(KERN_ERR TTM_PFX "Illegal buffer object size.\n");
|
|
return -EINVAL;
|
|
}
|
|
bo->destroy = destroy;
|
|
|
|
spin_lock_init(&bo->lock);
|
|
kref_init(&bo->kref);
|
|
kref_init(&bo->list_kref);
|
|
atomic_set(&bo->cpu_writers, 0);
|
|
atomic_set(&bo->reserved, 1);
|
|
init_waitqueue_head(&bo->event_queue);
|
|
INIT_LIST_HEAD(&bo->lru);
|
|
INIT_LIST_HEAD(&bo->ddestroy);
|
|
INIT_LIST_HEAD(&bo->swap);
|
|
bo->bdev = bdev;
|
|
bo->glob = bdev->glob;
|
|
bo->type = type;
|
|
bo->num_pages = num_pages;
|
|
bo->mem.size = num_pages << PAGE_SHIFT;
|
|
bo->mem.mem_type = TTM_PL_SYSTEM;
|
|
bo->mem.num_pages = bo->num_pages;
|
|
bo->mem.mm_node = NULL;
|
|
bo->mem.page_alignment = page_alignment;
|
|
bo->mem.bus.io_reserved = false;
|
|
bo->buffer_start = buffer_start & PAGE_MASK;
|
|
bo->priv_flags = 0;
|
|
bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
|
|
bo->seq_valid = false;
|
|
bo->persistant_swap_storage = persistant_swap_storage;
|
|
bo->acc_size = acc_size;
|
|
atomic_inc(&bo->glob->bo_count);
|
|
|
|
ret = ttm_bo_check_placement(bo, placement);
|
|
if (unlikely(ret != 0))
|
|
goto out_err;
|
|
|
|
/*
|
|
* For ttm_bo_type_device buffers, allocate
|
|
* address space from the device.
|
|
*/
|
|
if (bo->type == ttm_bo_type_device) {
|
|
ret = ttm_bo_setup_vm(bo);
|
|
if (ret)
|
|
goto out_err;
|
|
}
|
|
|
|
ret = ttm_bo_validate(bo, placement, interruptible, false, false);
|
|
if (ret)
|
|
goto out_err;
|
|
|
|
ttm_bo_unreserve(bo);
|
|
return 0;
|
|
|
|
out_err:
|
|
ttm_bo_unreserve(bo);
|
|
ttm_bo_unref(&bo);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_init);
|
|
|
|
static inline size_t ttm_bo_size(struct ttm_bo_global *glob,
|
|
unsigned long num_pages)
|
|
{
|
|
size_t page_array_size = (num_pages * sizeof(void *) + PAGE_SIZE - 1) &
|
|
PAGE_MASK;
|
|
|
|
return glob->ttm_bo_size + 2 * page_array_size;
|
|
}
|
|
|
|
int ttm_bo_create(struct ttm_bo_device *bdev,
|
|
unsigned long size,
|
|
enum ttm_bo_type type,
|
|
struct ttm_placement *placement,
|
|
uint32_t page_alignment,
|
|
unsigned long buffer_start,
|
|
bool interruptible,
|
|
struct file *persistant_swap_storage,
|
|
struct ttm_buffer_object **p_bo)
|
|
{
|
|
struct ttm_buffer_object *bo;
|
|
struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
|
|
int ret;
|
|
|
|
size_t acc_size =
|
|
ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
|
|
ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
bo = kzalloc(sizeof(*bo), GFP_KERNEL);
|
|
|
|
if (unlikely(bo == NULL)) {
|
|
ttm_mem_global_free(mem_glob, acc_size);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment,
|
|
buffer_start, interruptible,
|
|
persistant_swap_storage, acc_size, NULL);
|
|
if (likely(ret == 0))
|
|
*p_bo = bo;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
|
|
unsigned mem_type, bool allow_errors)
|
|
{
|
|
struct ttm_mem_type_manager *man = &bdev->man[mem_type];
|
|
struct ttm_bo_global *glob = bdev->glob;
|
|
int ret;
|
|
|
|
/*
|
|
* Can't use standard list traversal since we're unlocking.
|
|
*/
|
|
|
|
spin_lock(&glob->lru_lock);
|
|
while (!list_empty(&man->lru)) {
|
|
spin_unlock(&glob->lru_lock);
|
|
ret = ttm_mem_evict_first(bdev, mem_type, false, false, false);
|
|
if (ret) {
|
|
if (allow_errors) {
|
|
return ret;
|
|
} else {
|
|
printk(KERN_ERR TTM_PFX
|
|
"Cleanup eviction failed\n");
|
|
}
|
|
}
|
|
spin_lock(&glob->lru_lock);
|
|
}
|
|
spin_unlock(&glob->lru_lock);
|
|
return 0;
|
|
}
|
|
|
|
int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
|
|
{
|
|
struct ttm_bo_global *glob = bdev->glob;
|
|
struct ttm_mem_type_manager *man;
|
|
int ret = -EINVAL;
|
|
|
|
if (mem_type >= TTM_NUM_MEM_TYPES) {
|
|
printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", mem_type);
|
|
return ret;
|
|
}
|
|
man = &bdev->man[mem_type];
|
|
|
|
if (!man->has_type) {
|
|
printk(KERN_ERR TTM_PFX "Trying to take down uninitialized "
|
|
"memory manager type %u\n", mem_type);
|
|
return ret;
|
|
}
|
|
|
|
man->use_type = false;
|
|
man->has_type = false;
|
|
|
|
ret = 0;
|
|
if (mem_type > 0) {
|
|
ttm_bo_force_list_clean(bdev, mem_type, false);
|
|
|
|
spin_lock(&glob->lru_lock);
|
|
if (drm_mm_clean(&man->manager))
|
|
drm_mm_takedown(&man->manager);
|
|
else
|
|
ret = -EBUSY;
|
|
|
|
spin_unlock(&glob->lru_lock);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_clean_mm);
|
|
|
|
int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type)
|
|
{
|
|
struct ttm_mem_type_manager *man = &bdev->man[mem_type];
|
|
|
|
if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) {
|
|
printk(KERN_ERR TTM_PFX
|
|
"Illegal memory manager memory type %u.\n",
|
|
mem_type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!man->has_type) {
|
|
printk(KERN_ERR TTM_PFX
|
|
"Memory type %u has not been initialized.\n",
|
|
mem_type);
|
|
return 0;
|
|
}
|
|
|
|
return ttm_bo_force_list_clean(bdev, mem_type, true);
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_evict_mm);
|
|
|
|
int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
|
|
unsigned long p_size)
|
|
{
|
|
int ret = -EINVAL;
|
|
struct ttm_mem_type_manager *man;
|
|
|
|
if (type >= TTM_NUM_MEM_TYPES) {
|
|
printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type);
|
|
return ret;
|
|
}
|
|
|
|
man = &bdev->man[type];
|
|
if (man->has_type) {
|
|
printk(KERN_ERR TTM_PFX
|
|
"Memory manager already initialized for type %d\n",
|
|
type);
|
|
return ret;
|
|
}
|
|
|
|
ret = bdev->driver->init_mem_type(bdev, type, man);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = 0;
|
|
if (type != TTM_PL_SYSTEM) {
|
|
if (!p_size) {
|
|
printk(KERN_ERR TTM_PFX
|
|
"Zero size memory manager type %d\n",
|
|
type);
|
|
return ret;
|
|
}
|
|
ret = drm_mm_init(&man->manager, 0, p_size);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
man->has_type = true;
|
|
man->use_type = true;
|
|
man->size = p_size;
|
|
|
|
INIT_LIST_HEAD(&man->lru);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_init_mm);
|
|
|
|
static void ttm_bo_global_kobj_release(struct kobject *kobj)
|
|
{
|
|
struct ttm_bo_global *glob =
|
|
container_of(kobj, struct ttm_bo_global, kobj);
|
|
|
|
ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
|
|
__free_page(glob->dummy_read_page);
|
|
kfree(glob);
|
|
}
|
|
|
|
void ttm_bo_global_release(struct drm_global_reference *ref)
|
|
{
|
|
struct ttm_bo_global *glob = ref->object;
|
|
|
|
kobject_del(&glob->kobj);
|
|
kobject_put(&glob->kobj);
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_global_release);
|
|
|
|
int ttm_bo_global_init(struct drm_global_reference *ref)
|
|
{
|
|
struct ttm_bo_global_ref *bo_ref =
|
|
container_of(ref, struct ttm_bo_global_ref, ref);
|
|
struct ttm_bo_global *glob = ref->object;
|
|
int ret;
|
|
|
|
mutex_init(&glob->device_list_mutex);
|
|
spin_lock_init(&glob->lru_lock);
|
|
glob->mem_glob = bo_ref->mem_glob;
|
|
glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
|
|
|
|
if (unlikely(glob->dummy_read_page == NULL)) {
|
|
ret = -ENOMEM;
|
|
goto out_no_drp;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&glob->swap_lru);
|
|
INIT_LIST_HEAD(&glob->device_list);
|
|
|
|
ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
|
|
ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
|
|
if (unlikely(ret != 0)) {
|
|
printk(KERN_ERR TTM_PFX
|
|
"Could not register buffer object swapout.\n");
|
|
goto out_no_shrink;
|
|
}
|
|
|
|
glob->ttm_bo_extra_size =
|
|
ttm_round_pot(sizeof(struct ttm_tt)) +
|
|
ttm_round_pot(sizeof(struct ttm_backend));
|
|
|
|
glob->ttm_bo_size = glob->ttm_bo_extra_size +
|
|
ttm_round_pot(sizeof(struct ttm_buffer_object));
|
|
|
|
atomic_set(&glob->bo_count, 0);
|
|
|
|
ret = kobject_init_and_add(
|
|
&glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects");
|
|
if (unlikely(ret != 0))
|
|
kobject_put(&glob->kobj);
|
|
return ret;
|
|
out_no_shrink:
|
|
__free_page(glob->dummy_read_page);
|
|
out_no_drp:
|
|
kfree(glob);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_global_init);
|
|
|
|
|
|
int ttm_bo_device_release(struct ttm_bo_device *bdev)
|
|
{
|
|
int ret = 0;
|
|
unsigned i = TTM_NUM_MEM_TYPES;
|
|
struct ttm_mem_type_manager *man;
|
|
struct ttm_bo_global *glob = bdev->glob;
|
|
|
|
while (i--) {
|
|
man = &bdev->man[i];
|
|
if (man->has_type) {
|
|
man->use_type = false;
|
|
if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) {
|
|
ret = -EBUSY;
|
|
printk(KERN_ERR TTM_PFX
|
|
"DRM memory manager type %d "
|
|
"is not clean.\n", i);
|
|
}
|
|
man->has_type = false;
|
|
}
|
|
}
|
|
|
|
mutex_lock(&glob->device_list_mutex);
|
|
list_del(&bdev->device_list);
|
|
mutex_unlock(&glob->device_list_mutex);
|
|
|
|
if (!cancel_delayed_work(&bdev->wq))
|
|
flush_scheduled_work();
|
|
|
|
while (ttm_bo_delayed_delete(bdev, true))
|
|
;
|
|
|
|
spin_lock(&glob->lru_lock);
|
|
if (list_empty(&bdev->ddestroy))
|
|
TTM_DEBUG("Delayed destroy list was clean\n");
|
|
|
|
if (list_empty(&bdev->man[0].lru))
|
|
TTM_DEBUG("Swap list was clean\n");
|
|
spin_unlock(&glob->lru_lock);
|
|
|
|
BUG_ON(!drm_mm_clean(&bdev->addr_space_mm));
|
|
write_lock(&bdev->vm_lock);
|
|
drm_mm_takedown(&bdev->addr_space_mm);
|
|
write_unlock(&bdev->vm_lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_device_release);
|
|
|
|
int ttm_bo_device_init(struct ttm_bo_device *bdev,
|
|
struct ttm_bo_global *glob,
|
|
struct ttm_bo_driver *driver,
|
|
uint64_t file_page_offset,
|
|
bool need_dma32)
|
|
{
|
|
int ret = -EINVAL;
|
|
|
|
rwlock_init(&bdev->vm_lock);
|
|
bdev->driver = driver;
|
|
|
|
memset(bdev->man, 0, sizeof(bdev->man));
|
|
|
|
/*
|
|
* Initialize the system memory buffer type.
|
|
* Other types need to be driver / IOCTL initialized.
|
|
*/
|
|
ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_sys;
|
|
|
|
bdev->addr_space_rb = RB_ROOT;
|
|
ret = drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_addr_mm;
|
|
|
|
INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
|
|
bdev->nice_mode = true;
|
|
INIT_LIST_HEAD(&bdev->ddestroy);
|
|
bdev->dev_mapping = NULL;
|
|
bdev->glob = glob;
|
|
bdev->need_dma32 = need_dma32;
|
|
|
|
mutex_lock(&glob->device_list_mutex);
|
|
list_add_tail(&bdev->device_list, &glob->device_list);
|
|
mutex_unlock(&glob->device_list_mutex);
|
|
|
|
return 0;
|
|
out_no_addr_mm:
|
|
ttm_bo_clean_mm(bdev, 0);
|
|
out_no_sys:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_device_init);
|
|
|
|
/*
|
|
* buffer object vm functions.
|
|
*/
|
|
|
|
bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
|
|
{
|
|
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
|
|
|
|
if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
|
|
if (mem->mem_type == TTM_PL_SYSTEM)
|
|
return false;
|
|
|
|
if (man->flags & TTM_MEMTYPE_FLAG_CMA)
|
|
return false;
|
|
|
|
if (mem->placement & TTM_PL_FLAG_CACHED)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
|
|
{
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
loff_t offset = (loff_t) bo->addr_space_offset;
|
|
loff_t holelen = ((loff_t) bo->mem.num_pages) << PAGE_SHIFT;
|
|
|
|
if (!bdev->dev_mapping)
|
|
return;
|
|
unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1);
|
|
ttm_mem_io_free(bdev, &bo->mem);
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_unmap_virtual);
|
|
|
|
static void ttm_bo_vm_insert_rb(struct ttm_buffer_object *bo)
|
|
{
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
struct rb_node **cur = &bdev->addr_space_rb.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
struct ttm_buffer_object *cur_bo;
|
|
unsigned long offset = bo->vm_node->start;
|
|
unsigned long cur_offset;
|
|
|
|
while (*cur) {
|
|
parent = *cur;
|
|
cur_bo = rb_entry(parent, struct ttm_buffer_object, vm_rb);
|
|
cur_offset = cur_bo->vm_node->start;
|
|
if (offset < cur_offset)
|
|
cur = &parent->rb_left;
|
|
else if (offset > cur_offset)
|
|
cur = &parent->rb_right;
|
|
else
|
|
BUG();
|
|
}
|
|
|
|
rb_link_node(&bo->vm_rb, parent, cur);
|
|
rb_insert_color(&bo->vm_rb, &bdev->addr_space_rb);
|
|
}
|
|
|
|
/**
|
|
* ttm_bo_setup_vm:
|
|
*
|
|
* @bo: the buffer to allocate address space for
|
|
*
|
|
* Allocate address space in the drm device so that applications
|
|
* can mmap the buffer and access the contents. This only
|
|
* applies to ttm_bo_type_device objects as others are not
|
|
* placed in the drm device address space.
|
|
*/
|
|
|
|
static int ttm_bo_setup_vm(struct ttm_buffer_object *bo)
|
|
{
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
int ret;
|
|
|
|
retry_pre_get:
|
|
ret = drm_mm_pre_get(&bdev->addr_space_mm);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
write_lock(&bdev->vm_lock);
|
|
bo->vm_node = drm_mm_search_free(&bdev->addr_space_mm,
|
|
bo->mem.num_pages, 0, 0);
|
|
|
|
if (unlikely(bo->vm_node == NULL)) {
|
|
ret = -ENOMEM;
|
|
goto out_unlock;
|
|
}
|
|
|
|
bo->vm_node = drm_mm_get_block_atomic(bo->vm_node,
|
|
bo->mem.num_pages, 0);
|
|
|
|
if (unlikely(bo->vm_node == NULL)) {
|
|
write_unlock(&bdev->vm_lock);
|
|
goto retry_pre_get;
|
|
}
|
|
|
|
ttm_bo_vm_insert_rb(bo);
|
|
write_unlock(&bdev->vm_lock);
|
|
bo->addr_space_offset = ((uint64_t) bo->vm_node->start) << PAGE_SHIFT;
|
|
|
|
return 0;
|
|
out_unlock:
|
|
write_unlock(&bdev->vm_lock);
|
|
return ret;
|
|
}
|
|
|
|
int ttm_bo_wait(struct ttm_buffer_object *bo,
|
|
bool lazy, bool interruptible, bool no_wait)
|
|
{
|
|
struct ttm_bo_driver *driver = bo->bdev->driver;
|
|
void *sync_obj;
|
|
void *sync_obj_arg;
|
|
int ret = 0;
|
|
|
|
if (likely(bo->sync_obj == NULL))
|
|
return 0;
|
|
|
|
while (bo->sync_obj) {
|
|
|
|
if (driver->sync_obj_signaled(bo->sync_obj, bo->sync_obj_arg)) {
|
|
void *tmp_obj = bo->sync_obj;
|
|
bo->sync_obj = NULL;
|
|
clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
|
|
spin_unlock(&bo->lock);
|
|
driver->sync_obj_unref(&tmp_obj);
|
|
spin_lock(&bo->lock);
|
|
continue;
|
|
}
|
|
|
|
if (no_wait)
|
|
return -EBUSY;
|
|
|
|
sync_obj = driver->sync_obj_ref(bo->sync_obj);
|
|
sync_obj_arg = bo->sync_obj_arg;
|
|
spin_unlock(&bo->lock);
|
|
ret = driver->sync_obj_wait(sync_obj, sync_obj_arg,
|
|
lazy, interruptible);
|
|
if (unlikely(ret != 0)) {
|
|
driver->sync_obj_unref(&sync_obj);
|
|
spin_lock(&bo->lock);
|
|
return ret;
|
|
}
|
|
spin_lock(&bo->lock);
|
|
if (likely(bo->sync_obj == sync_obj &&
|
|
bo->sync_obj_arg == sync_obj_arg)) {
|
|
void *tmp_obj = bo->sync_obj;
|
|
bo->sync_obj = NULL;
|
|
clear_bit(TTM_BO_PRIV_FLAG_MOVING,
|
|
&bo->priv_flags);
|
|
spin_unlock(&bo->lock);
|
|
driver->sync_obj_unref(&sync_obj);
|
|
driver->sync_obj_unref(&tmp_obj);
|
|
spin_lock(&bo->lock);
|
|
} else {
|
|
spin_unlock(&bo->lock);
|
|
driver->sync_obj_unref(&sync_obj);
|
|
spin_lock(&bo->lock);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_wait);
|
|
|
|
int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
|
|
{
|
|
int ret = 0;
|
|
|
|
/*
|
|
* Using ttm_bo_reserve makes sure the lru lists are updated.
|
|
*/
|
|
|
|
ret = ttm_bo_reserve(bo, true, no_wait, false, 0);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
spin_lock(&bo->lock);
|
|
ret = ttm_bo_wait(bo, false, true, no_wait);
|
|
spin_unlock(&bo->lock);
|
|
if (likely(ret == 0))
|
|
atomic_inc(&bo->cpu_writers);
|
|
ttm_bo_unreserve(bo);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);
|
|
|
|
void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
|
|
{
|
|
if (atomic_dec_and_test(&bo->cpu_writers))
|
|
wake_up_all(&bo->event_queue);
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_synccpu_write_release);
|
|
|
|
/**
|
|
* A buffer object shrink method that tries to swap out the first
|
|
* buffer object on the bo_global::swap_lru list.
|
|
*/
|
|
|
|
static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
|
|
{
|
|
struct ttm_bo_global *glob =
|
|
container_of(shrink, struct ttm_bo_global, shrink);
|
|
struct ttm_buffer_object *bo;
|
|
int ret = -EBUSY;
|
|
int put_count;
|
|
uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);
|
|
|
|
spin_lock(&glob->lru_lock);
|
|
while (ret == -EBUSY) {
|
|
if (unlikely(list_empty(&glob->swap_lru))) {
|
|
spin_unlock(&glob->lru_lock);
|
|
return -EBUSY;
|
|
}
|
|
|
|
bo = list_first_entry(&glob->swap_lru,
|
|
struct ttm_buffer_object, swap);
|
|
kref_get(&bo->list_kref);
|
|
|
|
/**
|
|
* Reserve buffer. Since we unlock while sleeping, we need
|
|
* to re-check that nobody removed us from the swap-list while
|
|
* we slept.
|
|
*/
|
|
|
|
ret = ttm_bo_reserve_locked(bo, false, true, false, 0);
|
|
if (unlikely(ret == -EBUSY)) {
|
|
spin_unlock(&glob->lru_lock);
|
|
ttm_bo_wait_unreserved(bo, false);
|
|
kref_put(&bo->list_kref, ttm_bo_release_list);
|
|
spin_lock(&glob->lru_lock);
|
|
}
|
|
}
|
|
|
|
BUG_ON(ret != 0);
|
|
put_count = ttm_bo_del_from_lru(bo);
|
|
spin_unlock(&glob->lru_lock);
|
|
|
|
while (put_count--)
|
|
kref_put(&bo->list_kref, ttm_bo_ref_bug);
|
|
|
|
/**
|
|
* Wait for GPU, then move to system cached.
|
|
*/
|
|
|
|
spin_lock(&bo->lock);
|
|
ret = ttm_bo_wait(bo, false, false, false);
|
|
spin_unlock(&bo->lock);
|
|
|
|
if (unlikely(ret != 0))
|
|
goto out;
|
|
|
|
if ((bo->mem.placement & swap_placement) != swap_placement) {
|
|
struct ttm_mem_reg evict_mem;
|
|
|
|
evict_mem = bo->mem;
|
|
evict_mem.mm_node = NULL;
|
|
evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
|
|
evict_mem.mem_type = TTM_PL_SYSTEM;
|
|
|
|
ret = ttm_bo_handle_move_mem(bo, &evict_mem, true,
|
|
false, false, false);
|
|
if (unlikely(ret != 0))
|
|
goto out;
|
|
}
|
|
|
|
ttm_bo_unmap_virtual(bo);
|
|
|
|
/**
|
|
* Swap out. Buffer will be swapped in again as soon as
|
|
* anyone tries to access a ttm page.
|
|
*/
|
|
|
|
if (bo->bdev->driver->swap_notify)
|
|
bo->bdev->driver->swap_notify(bo);
|
|
|
|
ret = ttm_tt_swapout(bo->ttm, bo->persistant_swap_storage);
|
|
out:
|
|
|
|
/**
|
|
*
|
|
* Unreserve without putting on LRU to avoid swapping out an
|
|
* already swapped buffer.
|
|
*/
|
|
|
|
atomic_set(&bo->reserved, 0);
|
|
wake_up_all(&bo->event_queue);
|
|
kref_put(&bo->list_kref, ttm_bo_release_list);
|
|
return ret;
|
|
}
|
|
|
|
void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
|
|
{
|
|
while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
|
|
;
|
|
}
|
|
EXPORT_SYMBOL(ttm_bo_swapout_all);
|