/* $OpenBSD: drm_cache.c,v 1.7 2019/04/14 10:14:51 jsg Exp $ */ /* * Copyright (c) 2017 Mark Kettenis * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #if defined(__i386__) || defined(__amd64__) static void drm_clflush_page(struct vm_page *page) { void *addr; if (page == NULL) return; addr = kmap_atomic(page); pmap_flush_cache((vaddr_t)addr, PAGE_SIZE); kunmap_atomic(addr); } void drm_clflush_pages(struct vm_page *pages[], unsigned long num_pages) { unsigned long i; for (i = 0; i < num_pages; i++) drm_clflush_page(*pages++); } void drm_clflush_sg(struct sg_table *st) { struct sg_page_iter sg_iter; for_each_sg_page(st->sgl, &sg_iter, st->nents, 0) drm_clflush_page(sg_page_iter_page(&sg_iter)); } void drm_clflush_virt_range(void *addr, unsigned long length) { pmap_flush_cache((vaddr_t)addr, length); } #else void drm_clflush_pages(struct vm_page *pages[], unsigned long num_pages) { STUB(); } #endif