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4856380063
ttm. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCZapnVgAKCRDj7w1vZxhR xStMAQDK8YH1S3cvNO6DEpge7tPc8NoUoDUd+O9ZefhL6+qT7gEAlNWcjSpxqTnX 3NCLJbITAAvG58edL809JeW+JiBEUAA= =h3CM -----END PGP SIGNATURE----- gpgsig -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCZcDErgAKCRDj7w1vZxhR xcd2AP4yEGlt0fG5cMzww2Ct2NH7YAan/6o/WTkDTRGt3SoV9QEA6FSVQgXbOOkL hXh9qKMVar4rpe1D8fCy0RVpjvwF8gA= =WUjQ -----END PGP SIGNATURE----- Merge drm-misc-next-fixes-2024-01-19 into drm-misc-fixes Merge the last drm-misc-next-fixes tag that fell through the cracks. Signed-off-by: Maxime Ripard <mripard@kernel.org>
312 lines
8.0 KiB
C
312 lines
8.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/*
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* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
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* Copyright 2020 Advanced Micro Devices, Inc.
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions 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 NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Christian König
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*/
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#define pr_fmt(fmt) "[TTM DEVICE] " fmt
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#include <linux/mm.h>
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#include <drm/ttm/ttm_bo.h>
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#include <drm/ttm/ttm_device.h>
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#include <drm/ttm/ttm_tt.h>
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#include <drm/ttm/ttm_placement.h>
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#include "ttm_module.h"
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/*
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* ttm_global_mutex - protecting the global state
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*/
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static DEFINE_MUTEX(ttm_global_mutex);
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static unsigned ttm_glob_use_count;
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struct ttm_global ttm_glob;
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EXPORT_SYMBOL(ttm_glob);
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struct dentry *ttm_debugfs_root;
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static void ttm_global_release(void)
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{
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struct ttm_global *glob = &ttm_glob;
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mutex_lock(&ttm_global_mutex);
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if (--ttm_glob_use_count > 0)
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goto out;
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ttm_pool_mgr_fini();
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debugfs_remove(ttm_debugfs_root);
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__free_page(glob->dummy_read_page);
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memset(glob, 0, sizeof(*glob));
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out:
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mutex_unlock(&ttm_global_mutex);
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}
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static int ttm_global_init(void)
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{
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struct ttm_global *glob = &ttm_glob;
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unsigned long num_pages, num_dma32;
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struct sysinfo si;
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int ret = 0;
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mutex_lock(&ttm_global_mutex);
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if (++ttm_glob_use_count > 1)
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goto out;
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si_meminfo(&si);
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ttm_debugfs_root = debugfs_create_dir("ttm", NULL);
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if (IS_ERR(ttm_debugfs_root)) {
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ttm_debugfs_root = NULL;
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}
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/* Limit the number of pages in the pool to about 50% of the total
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* system memory.
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*/
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num_pages = ((u64)si.totalram * si.mem_unit) >> PAGE_SHIFT;
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num_pages /= 2;
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/* But for DMA32 we limit ourself to only use 2GiB maximum. */
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num_dma32 = (u64)(si.totalram - si.totalhigh) * si.mem_unit
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>> PAGE_SHIFT;
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num_dma32 = min(num_dma32, 2UL << (30 - PAGE_SHIFT));
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ttm_pool_mgr_init(num_pages);
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ttm_tt_mgr_init(num_pages, num_dma32);
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glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32 |
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__GFP_NOWARN);
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/* Retry without GFP_DMA32 for platforms DMA32 is not available */
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if (unlikely(glob->dummy_read_page == NULL)) {
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glob->dummy_read_page = alloc_page(__GFP_ZERO);
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if (unlikely(glob->dummy_read_page == NULL)) {
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ret = -ENOMEM;
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goto out;
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}
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pr_warn("Using GFP_DMA32 fallback for dummy_read_page\n");
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}
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INIT_LIST_HEAD(&glob->device_list);
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atomic_set(&glob->bo_count, 0);
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debugfs_create_atomic_t("buffer_objects", 0444, ttm_debugfs_root,
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&glob->bo_count);
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out:
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if (ret && ttm_debugfs_root)
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debugfs_remove(ttm_debugfs_root);
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if (ret)
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--ttm_glob_use_count;
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mutex_unlock(&ttm_global_mutex);
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return ret;
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}
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/*
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* A buffer object shrink method that tries to swap out the first
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* buffer object on the global::swap_lru list.
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*/
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int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags)
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{
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struct ttm_global *glob = &ttm_glob;
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struct ttm_device *bdev;
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int ret = 0;
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mutex_lock(&ttm_global_mutex);
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list_for_each_entry(bdev, &glob->device_list, device_list) {
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ret = ttm_device_swapout(bdev, ctx, gfp_flags);
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if (ret > 0) {
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list_move_tail(&bdev->device_list, &glob->device_list);
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break;
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}
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}
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mutex_unlock(&ttm_global_mutex);
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return ret;
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}
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int ttm_device_swapout(struct ttm_device *bdev, struct ttm_operation_ctx *ctx,
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gfp_t gfp_flags)
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{
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struct ttm_resource_cursor cursor;
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struct ttm_resource_manager *man;
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struct ttm_resource *res;
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unsigned i;
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int ret;
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spin_lock(&bdev->lru_lock);
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for (i = TTM_PL_SYSTEM; i < TTM_NUM_MEM_TYPES; ++i) {
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man = ttm_manager_type(bdev, i);
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if (!man || !man->use_tt)
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continue;
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ttm_resource_manager_for_each_res(man, &cursor, res) {
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struct ttm_buffer_object *bo = res->bo;
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uint32_t num_pages;
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if (!bo || bo->resource != res)
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continue;
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num_pages = PFN_UP(bo->base.size);
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ret = ttm_bo_swapout(bo, ctx, gfp_flags);
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/* ttm_bo_swapout has dropped the lru_lock */
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if (!ret)
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return num_pages;
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if (ret != -EBUSY)
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return ret;
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}
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}
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spin_unlock(&bdev->lru_lock);
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return 0;
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}
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EXPORT_SYMBOL(ttm_device_swapout);
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/**
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* ttm_device_init
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*
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* @bdev: A pointer to a struct ttm_device to initialize.
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* @funcs: Function table for the device.
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* @dev: The core kernel device pointer for DMA mappings and allocations.
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* @mapping: The address space to use for this bo.
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* @vma_manager: A pointer to a vma manager.
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* @use_dma_alloc: If coherent DMA allocation API should be used.
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* @use_dma32: If we should use GFP_DMA32 for device memory allocations.
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*
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* Initializes a struct ttm_device:
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* Returns:
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* !0: Failure.
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*/
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int ttm_device_init(struct ttm_device *bdev, const struct ttm_device_funcs *funcs,
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struct device *dev, struct address_space *mapping,
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struct drm_vma_offset_manager *vma_manager,
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bool use_dma_alloc, bool use_dma32)
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{
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struct ttm_global *glob = &ttm_glob;
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int ret, nid;
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if (WARN_ON(vma_manager == NULL))
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return -EINVAL;
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ret = ttm_global_init();
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if (ret)
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return ret;
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bdev->wq = alloc_workqueue("ttm",
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WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_UNBOUND, 16);
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if (!bdev->wq) {
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ttm_global_release();
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return -ENOMEM;
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}
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bdev->funcs = funcs;
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ttm_sys_man_init(bdev);
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if (dev)
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nid = dev_to_node(dev);
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else
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nid = NUMA_NO_NODE;
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ttm_pool_init(&bdev->pool, dev, nid, use_dma_alloc, use_dma32);
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bdev->vma_manager = vma_manager;
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spin_lock_init(&bdev->lru_lock);
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INIT_LIST_HEAD(&bdev->pinned);
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bdev->dev_mapping = mapping;
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mutex_lock(&ttm_global_mutex);
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list_add_tail(&bdev->device_list, &glob->device_list);
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mutex_unlock(&ttm_global_mutex);
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return 0;
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}
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EXPORT_SYMBOL(ttm_device_init);
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void ttm_device_fini(struct ttm_device *bdev)
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{
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struct ttm_resource_manager *man;
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unsigned i;
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mutex_lock(&ttm_global_mutex);
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list_del(&bdev->device_list);
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mutex_unlock(&ttm_global_mutex);
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drain_workqueue(bdev->wq);
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destroy_workqueue(bdev->wq);
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man = ttm_manager_type(bdev, TTM_PL_SYSTEM);
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ttm_resource_manager_set_used(man, false);
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ttm_set_driver_manager(bdev, TTM_PL_SYSTEM, NULL);
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spin_lock(&bdev->lru_lock);
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for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
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if (list_empty(&man->lru[0]))
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pr_debug("Swap list %d was clean\n", i);
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spin_unlock(&bdev->lru_lock);
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ttm_pool_fini(&bdev->pool);
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ttm_global_release();
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}
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EXPORT_SYMBOL(ttm_device_fini);
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static void ttm_device_clear_lru_dma_mappings(struct ttm_device *bdev,
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struct list_head *list)
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{
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struct ttm_resource *res;
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spin_lock(&bdev->lru_lock);
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while ((res = list_first_entry_or_null(list, typeof(*res), lru))) {
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struct ttm_buffer_object *bo = res->bo;
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/* Take ref against racing releases once lru_lock is unlocked */
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if (!ttm_bo_get_unless_zero(bo))
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continue;
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list_del_init(&res->lru);
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spin_unlock(&bdev->lru_lock);
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if (bo->ttm)
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ttm_tt_unpopulate(bo->bdev, bo->ttm);
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ttm_bo_put(bo);
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spin_lock(&bdev->lru_lock);
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}
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spin_unlock(&bdev->lru_lock);
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}
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void ttm_device_clear_dma_mappings(struct ttm_device *bdev)
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{
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struct ttm_resource_manager *man;
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unsigned int i, j;
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ttm_device_clear_lru_dma_mappings(bdev, &bdev->pinned);
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for (i = TTM_PL_SYSTEM; i < TTM_NUM_MEM_TYPES; ++i) {
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man = ttm_manager_type(bdev, i);
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if (!man || !man->use_tt)
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continue;
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for (j = 0; j < TTM_MAX_BO_PRIORITY; ++j)
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ttm_device_clear_lru_dma_mappings(bdev, &man->lru[j]);
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}
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}
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EXPORT_SYMBOL(ttm_device_clear_dma_mappings);
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