diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_page_dirty.c')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_page_dirty.c | 63 |
1 files changed, 42 insertions, 21 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_page_dirty.c b/drivers/gpu/drm/vmwgfx/vmwgfx_page_dirty.c index 74ff2812d66a..7de20e56082c 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_page_dirty.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_page_dirty.c @@ -1,27 +1,8 @@ // SPDX-License-Identifier: GPL-2.0 OR MIT /************************************************************************** * - * Copyright 2019-2023 VMware, Inc., Palo Alto, CA., USA - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sub license, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice (including the - * next paragraph) shall be included in all copies or substantial portions - * of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL - * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, - * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR - * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE - * USE OR OTHER DEALINGS IN THE SOFTWARE. + * Copyright (c) 2019-2025 Broadcom. All Rights Reserved. The term + * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. * **************************************************************************/ #include "vmwgfx_bo.h" @@ -71,6 +52,11 @@ struct vmw_bo_dirty { unsigned long bitmap[]; }; +bool vmw_bo_is_dirty(struct vmw_bo *vbo) +{ + return vbo->dirty && (vbo->dirty->start < vbo->dirty->end); +} + /** * vmw_bo_dirty_scan_pagetable - Perform a pagetable scan for dirty bits * @vbo: The buffer object to scan @@ -341,6 +327,41 @@ void vmw_bo_dirty_transfer_to_res(struct vmw_resource *res) dirty->end = res_start; } +void vmw_bo_dirty_clear(struct vmw_bo *vbo) +{ + struct vmw_bo_dirty *dirty = vbo->dirty; + pgoff_t start, cur, end; + unsigned long res_start = 0; + unsigned long res_end = vbo->tbo.base.size; + + WARN_ON_ONCE(res_start & ~PAGE_MASK); + res_start >>= PAGE_SHIFT; + res_end = DIV_ROUND_UP(res_end, PAGE_SIZE); + + if (res_start >= dirty->end || res_end <= dirty->start) + return; + + cur = max(res_start, dirty->start); + res_end = max(res_end, dirty->end); + while (cur < res_end) { + unsigned long num; + + start = find_next_bit(&dirty->bitmap[0], res_end, cur); + if (start >= res_end) + break; + + end = find_next_zero_bit(&dirty->bitmap[0], res_end, start + 1); + cur = end + 1; + num = end - start; + bitmap_clear(&dirty->bitmap[0], start, num); + } + + if (res_start <= dirty->start && res_end > dirty->start) + dirty->start = res_end; + if (res_start < dirty->end && res_end >= dirty->end) + dirty->end = res_start; +} + /** * vmw_bo_dirty_clear_res - Clear a resource's dirty region from * its backing mob. |