![Huang Rui](/assets/img/avatar_default.png)
All non-x86 definitions are moved to ttm_set_memory header, so remove it from ttm_tt.c. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Huang Rui <ray.huang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
501 lines
11 KiB
C
501 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/**************************************************************************
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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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#define pr_fmt(fmt) "[TTM] " fmt
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#include <linux/sched.h>
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#include <linux/pagemap.h>
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#include <linux/shmem_fs.h>
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#include <linux/file.h>
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#include <drm/drm_cache.h>
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#include <drm/ttm/ttm_bo_driver.h>
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#include <drm/ttm/ttm_page_alloc.h>
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#include <drm/ttm/ttm_set_memory.h>
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/**
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* Allocates a ttm structure for the given BO.
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*/
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int ttm_tt_create(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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uint32_t page_flags = 0;
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reservation_object_assert_held(bo->resv);
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if (bdev->need_dma32)
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page_flags |= TTM_PAGE_FLAG_DMA32;
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if (bdev->no_retry)
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page_flags |= TTM_PAGE_FLAG_NO_RETRY;
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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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break;
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case ttm_bo_type_kernel:
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break;
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case ttm_bo_type_sg:
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page_flags |= TTM_PAGE_FLAG_SG;
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break;
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default:
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bo->ttm = NULL;
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pr_err("Illegal buffer object type\n");
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return -EINVAL;
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}
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bo->ttm = bdev->driver->ttm_tt_create(bo, page_flags);
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if (unlikely(bo->ttm == NULL))
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return -ENOMEM;
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return 0;
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}
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/**
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* Allocates storage for pointers to the pages that back the ttm.
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*/
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static int ttm_tt_alloc_page_directory(struct ttm_tt *ttm)
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{
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ttm->pages = kvmalloc_array(ttm->num_pages, sizeof(void*),
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GFP_KERNEL | __GFP_ZERO);
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if (!ttm->pages)
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return -ENOMEM;
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return 0;
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}
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static int ttm_dma_tt_alloc_page_directory(struct ttm_dma_tt *ttm)
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{
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ttm->ttm.pages = kvmalloc_array(ttm->ttm.num_pages,
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sizeof(*ttm->ttm.pages) +
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sizeof(*ttm->dma_address),
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GFP_KERNEL | __GFP_ZERO);
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if (!ttm->ttm.pages)
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return -ENOMEM;
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ttm->dma_address = (void *) (ttm->ttm.pages + ttm->ttm.num_pages);
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return 0;
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}
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static int ttm_sg_tt_alloc_page_directory(struct ttm_dma_tt *ttm)
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{
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ttm->dma_address = kvmalloc_array(ttm->ttm.num_pages,
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sizeof(*ttm->dma_address),
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GFP_KERNEL | __GFP_ZERO);
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if (!ttm->dma_address)
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return -ENOMEM;
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return 0;
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}
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static int ttm_tt_set_page_caching(struct page *p,
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enum ttm_caching_state c_old,
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enum ttm_caching_state c_new)
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{
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int ret = 0;
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if (PageHighMem(p))
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return 0;
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if (c_old != tt_cached) {
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/* p isn't in the default caching state, set it to
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* writeback first to free its current memtype. */
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ret = ttm_set_pages_wb(p, 1);
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if (ret)
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return ret;
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}
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if (c_new == tt_wc)
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ret = ttm_set_pages_wc(p, 1);
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else if (c_new == tt_uncached)
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ret = ttm_set_pages_uc(p, 1);
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return ret;
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}
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/*
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* Change caching policy for the linear kernel map
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* for range of pages in a ttm.
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*/
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static int ttm_tt_set_caching(struct ttm_tt *ttm,
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enum ttm_caching_state c_state)
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{
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int i, j;
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struct page *cur_page;
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int ret;
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if (ttm->caching_state == c_state)
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return 0;
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if (ttm->state == tt_unpopulated) {
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/* Change caching but don't populate */
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ttm->caching_state = c_state;
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return 0;
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}
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if (ttm->caching_state == tt_cached)
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drm_clflush_pages(ttm->pages, ttm->num_pages);
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for (i = 0; i < ttm->num_pages; ++i) {
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cur_page = ttm->pages[i];
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if (likely(cur_page != NULL)) {
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ret = ttm_tt_set_page_caching(cur_page,
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ttm->caching_state,
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c_state);
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if (unlikely(ret != 0))
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goto out_err;
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}
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}
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ttm->caching_state = c_state;
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return 0;
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out_err:
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for (j = 0; j < i; ++j) {
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cur_page = ttm->pages[j];
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if (likely(cur_page != NULL)) {
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(void)ttm_tt_set_page_caching(cur_page, c_state,
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ttm->caching_state);
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}
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}
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return ret;
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}
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int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement)
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{
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enum ttm_caching_state state;
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if (placement & TTM_PL_FLAG_WC)
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state = tt_wc;
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else if (placement & TTM_PL_FLAG_UNCACHED)
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state = tt_uncached;
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else
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state = tt_cached;
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return ttm_tt_set_caching(ttm, state);
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}
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EXPORT_SYMBOL(ttm_tt_set_placement_caching);
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void ttm_tt_destroy(struct ttm_tt *ttm)
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{
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if (ttm == NULL)
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return;
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ttm_tt_unbind(ttm);
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if (ttm->state == tt_unbound)
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ttm_tt_unpopulate(ttm);
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if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
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ttm->swap_storage)
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fput(ttm->swap_storage);
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ttm->swap_storage = NULL;
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ttm->func->destroy(ttm);
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}
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void ttm_tt_init_fields(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
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uint32_t page_flags)
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{
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ttm->bdev = bo->bdev;
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ttm->num_pages = bo->num_pages;
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ttm->caching_state = tt_cached;
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ttm->page_flags = page_flags;
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ttm->state = tt_unpopulated;
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ttm->swap_storage = NULL;
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ttm->sg = bo->sg;
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}
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int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
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uint32_t page_flags)
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{
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ttm_tt_init_fields(ttm, bo, page_flags);
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if (ttm_tt_alloc_page_directory(ttm)) {
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ttm_tt_destroy(ttm);
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pr_err("Failed allocating page table\n");
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return -ENOMEM;
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}
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return 0;
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}
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EXPORT_SYMBOL(ttm_tt_init);
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void ttm_tt_fini(struct ttm_tt *ttm)
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{
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kvfree(ttm->pages);
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ttm->pages = NULL;
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}
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EXPORT_SYMBOL(ttm_tt_fini);
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int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object *bo,
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uint32_t page_flags)
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{
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struct ttm_tt *ttm = &ttm_dma->ttm;
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ttm_tt_init_fields(ttm, bo, page_flags);
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INIT_LIST_HEAD(&ttm_dma->pages_list);
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if (ttm_dma_tt_alloc_page_directory(ttm_dma)) {
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ttm_tt_destroy(ttm);
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pr_err("Failed allocating page table\n");
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return -ENOMEM;
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}
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return 0;
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}
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EXPORT_SYMBOL(ttm_dma_tt_init);
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int ttm_sg_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object *bo,
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uint32_t page_flags)
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{
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struct ttm_tt *ttm = &ttm_dma->ttm;
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int ret;
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ttm_tt_init_fields(ttm, bo, page_flags);
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INIT_LIST_HEAD(&ttm_dma->pages_list);
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if (page_flags & TTM_PAGE_FLAG_SG)
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ret = ttm_sg_tt_alloc_page_directory(ttm_dma);
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else
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ret = ttm_dma_tt_alloc_page_directory(ttm_dma);
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if (ret) {
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ttm_tt_destroy(ttm);
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pr_err("Failed allocating page table\n");
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return -ENOMEM;
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}
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return 0;
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}
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EXPORT_SYMBOL(ttm_sg_tt_init);
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void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma)
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{
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struct ttm_tt *ttm = &ttm_dma->ttm;
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if (ttm->pages)
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kvfree(ttm->pages);
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else
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kvfree(ttm_dma->dma_address);
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ttm->pages = NULL;
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ttm_dma->dma_address = NULL;
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}
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EXPORT_SYMBOL(ttm_dma_tt_fini);
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void ttm_tt_unbind(struct ttm_tt *ttm)
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{
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int ret;
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if (ttm->state == tt_bound) {
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ret = ttm->func->unbind(ttm);
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BUG_ON(ret);
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ttm->state = tt_unbound;
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}
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}
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int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem,
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struct ttm_operation_ctx *ctx)
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{
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int ret = 0;
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if (!ttm)
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return -EINVAL;
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if (ttm->state == tt_bound)
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return 0;
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ret = ttm_tt_populate(ttm, ctx);
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if (ret)
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return ret;
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ret = ttm->func->bind(ttm, bo_mem);
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if (unlikely(ret != 0))
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return ret;
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ttm->state = tt_bound;
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return 0;
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}
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EXPORT_SYMBOL(ttm_tt_bind);
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int ttm_tt_swapin(struct ttm_tt *ttm)
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{
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struct address_space *swap_space;
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struct file *swap_storage;
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struct page *from_page;
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struct page *to_page;
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int i;
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int ret = -ENOMEM;
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swap_storage = ttm->swap_storage;
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BUG_ON(swap_storage == NULL);
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swap_space = swap_storage->f_mapping;
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for (i = 0; i < ttm->num_pages; ++i) {
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gfp_t gfp_mask = mapping_gfp_mask(swap_space);
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gfp_mask |= (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY ? __GFP_RETRY_MAYFAIL : 0);
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from_page = shmem_read_mapping_page_gfp(swap_space, i, gfp_mask);
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if (IS_ERR(from_page)) {
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ret = PTR_ERR(from_page);
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goto out_err;
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}
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to_page = ttm->pages[i];
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if (unlikely(to_page == NULL))
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goto out_err;
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copy_highpage(to_page, from_page);
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put_page(from_page);
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}
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if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP))
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fput(swap_storage);
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ttm->swap_storage = NULL;
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ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
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return 0;
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out_err:
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return ret;
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}
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int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
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{
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struct address_space *swap_space;
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struct file *swap_storage;
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struct page *from_page;
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struct page *to_page;
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int i;
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int ret = -ENOMEM;
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BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
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BUG_ON(ttm->caching_state != tt_cached);
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if (!persistent_swap_storage) {
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swap_storage = shmem_file_setup("ttm swap",
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ttm->num_pages << PAGE_SHIFT,
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0);
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if (IS_ERR(swap_storage)) {
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pr_err("Failed allocating swap storage\n");
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return PTR_ERR(swap_storage);
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}
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} else {
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swap_storage = persistent_swap_storage;
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}
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swap_space = swap_storage->f_mapping;
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for (i = 0; i < ttm->num_pages; ++i) {
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gfp_t gfp_mask = mapping_gfp_mask(swap_space);
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gfp_mask |= (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY ? __GFP_RETRY_MAYFAIL : 0);
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from_page = ttm->pages[i];
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if (unlikely(from_page == NULL))
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continue;
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to_page = shmem_read_mapping_page_gfp(swap_space, i, gfp_mask);
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if (IS_ERR(to_page)) {
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ret = PTR_ERR(to_page);
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goto out_err;
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}
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copy_highpage(to_page, from_page);
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set_page_dirty(to_page);
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mark_page_accessed(to_page);
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put_page(to_page);
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}
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ttm_tt_unpopulate(ttm);
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ttm->swap_storage = swap_storage;
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ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
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if (persistent_swap_storage)
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ttm->page_flags |= TTM_PAGE_FLAG_PERSISTENT_SWAP;
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return 0;
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out_err:
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if (!persistent_swap_storage)
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fput(swap_storage);
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return ret;
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}
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static void ttm_tt_add_mapping(struct ttm_tt *ttm)
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{
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pgoff_t i;
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if (ttm->page_flags & TTM_PAGE_FLAG_SG)
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return;
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for (i = 0; i < ttm->num_pages; ++i)
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ttm->pages[i]->mapping = ttm->bdev->dev_mapping;
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}
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int ttm_tt_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
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{
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int ret;
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if (ttm->state != tt_unpopulated)
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return 0;
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if (ttm->bdev->driver->ttm_tt_populate)
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ret = ttm->bdev->driver->ttm_tt_populate(ttm, ctx);
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else
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ret = ttm_pool_populate(ttm, ctx);
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if (!ret)
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ttm_tt_add_mapping(ttm);
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return ret;
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}
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static void ttm_tt_clear_mapping(struct ttm_tt *ttm)
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{
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pgoff_t i;
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struct page **page = ttm->pages;
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if (ttm->page_flags & TTM_PAGE_FLAG_SG)
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return;
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for (i = 0; i < ttm->num_pages; ++i) {
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(*page)->mapping = NULL;
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(*page++)->index = 0;
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}
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}
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void ttm_tt_unpopulate(struct ttm_tt *ttm)
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{
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if (ttm->state == tt_unpopulated)
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return;
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ttm_tt_clear_mapping(ttm);
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if (ttm->bdev->driver->ttm_tt_unpopulate)
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ttm->bdev->driver->ttm_tt_unpopulate(ttm);
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else
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ttm_pool_unpopulate(ttm);
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}
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