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bb01efa6f8
[Why] This function takes an offset and a length as argument, not a physical address and a number of pages. This misuse caused the `set_memory_*()` and `arch_io_reserve_memtype_wc()` functions to return EINVAL. Another problem was the fact that they returned errors as a positive integer, whereas Linux uses negative integers. [How] Physical addresses and number of pages are converted to offset+length in the `set_memory_*()` functions. `arch_io_reserve_memtype_wc()` now calls `pmap_change_attr()` directly instead of using `set_memory_wc()`. Reviewed by: manu Approved by: manu Differential Revision: https://reviews.freebsd.org/D42053 (cherry picked from commit 1e99b2ee90956f275c3668e92a408400f2dada1c)
135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2016 Matt Macy (mmacy@nextbsd.org)
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* Copyright (c) 2017 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUXKPI_ASM_SET_MEMORY_H_
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#define _LINUXKPI_ASM_SET_MEMORY_H_
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#include <linux/page.h>
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static inline int
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set_memory_uc(unsigned long addr, int numpages)
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{
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vm_offset_t va;
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vm_size_t len;
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va = PHYS_TO_DMAP(addr);
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len = numpages << PAGE_SHIFT;
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return (-pmap_change_attr(va, len, VM_MEMATTR_UNCACHEABLE));
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}
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static inline int
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set_memory_wc(unsigned long addr, int numpages)
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{
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#ifdef VM_MEMATTR_WRITE_COMBINING
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vm_offset_t va;
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vm_size_t len;
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va = PHYS_TO_DMAP(addr);
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len = numpages << PAGE_SHIFT;
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return (-pmap_change_attr(va, len, VM_MEMATTR_WRITE_COMBINING));
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#else
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return (set_memory_uc(addr, numpages));
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#endif
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}
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static inline int
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set_memory_wb(unsigned long addr, int numpages)
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{
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vm_offset_t va;
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vm_size_t len;
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va = PHYS_TO_DMAP(addr);
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len = numpages << PAGE_SHIFT;
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return (-pmap_change_attr(va, len, VM_MEMATTR_WRITE_BACK));
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}
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static inline int
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set_pages_uc(struct page *page, int numpages)
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{
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KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
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pmap_page_set_memattr(page, VM_MEMATTR_UNCACHEABLE);
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return (0);
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}
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static inline int
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set_pages_wc(struct page *page, int numpages)
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{
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KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
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#ifdef VM_MEMATTR_WRITE_COMBINING
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pmap_page_set_memattr(page, VM_MEMATTR_WRITE_COMBINING);
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#else
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return (set_pages_uc(page, numpages));
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#endif
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return (0);
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}
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static inline int
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set_pages_wb(struct page *page, int numpages)
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{
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KASSERT(numpages == 1, ("%s: numpages %d", __func__, numpages));
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pmap_page_set_memattr(page, VM_MEMATTR_WRITE_BACK);
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return (0);
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}
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static inline int
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set_pages_array_wb(struct page **pages, int addrinarray)
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{
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int i;
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for (i = 0; i < addrinarray; i++)
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set_pages_wb(pages[i], 1);
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return (0);
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}
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static inline int
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set_pages_array_wc(struct page **pages, int addrinarray)
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{
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int i;
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for (i = 0; i < addrinarray; i++)
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set_pages_wc(pages[i], 1);
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return (0);
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}
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static inline int
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set_pages_array_uc(struct page **pages, int addrinarray)
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{
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int i;
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for (i = 0; i < addrinarray; i++)
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set_pages_uc(pages[i], 1);
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return (0);
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}
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#endif /* _LINUXKPI_ASM_SET_MEMORY_H_ */
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