152 lines
3.3 KiB
C
152 lines
3.3 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* (C) Copyright 2020 Hewlett Packard Enterprise Development LP
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* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
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*/
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/*
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* Cross Partition (XP) uv-based functions.
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*
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* Architecture specific implementation of common functions.
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*
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*/
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#include <linux/device.h>
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#include <asm/uv/uv_hub.h>
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#if defined CONFIG_X86_64
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#include <asm/uv/bios.h>
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#endif
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#include "../sgi-gru/grukservices.h"
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#include "xp.h"
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/*
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* Convert a virtual memory address to a physical memory address.
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*/
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static unsigned long
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xp_pa_uv(void *addr)
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{
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return uv_gpa(addr);
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}
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/*
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* Convert a global physical to socket physical address.
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*/
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static unsigned long
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xp_socket_pa_uv(unsigned long gpa)
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{
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return uv_gpa_to_soc_phys_ram(gpa);
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}
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static enum xp_retval
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xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa,
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size_t len)
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{
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int ret;
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unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa));
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BUG_ON(!uv_gpa_in_mmr_space(src_gpa));
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BUG_ON(len != 8);
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ret = gru_read_gpa(dst_va, src_gpa);
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if (ret == 0)
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return xpSuccess;
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dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
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"len=%ld\n", dst_gpa, src_gpa, len);
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return xpGruCopyError;
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}
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static enum xp_retval
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xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
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size_t len)
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{
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int ret;
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if (uv_gpa_in_mmr_space(src_gpa))
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return xp_remote_mmr_read(dst_gpa, src_gpa, len);
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ret = gru_copy_gpa(dst_gpa, src_gpa, len);
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if (ret == 0)
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return xpSuccess;
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dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
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"len=%ld\n", dst_gpa, src_gpa, len);
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return xpGruCopyError;
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}
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static int
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xp_cpu_to_nasid_uv(int cpuid)
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{
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/* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
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return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
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}
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static enum xp_retval
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xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
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{
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int ret;
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#if defined CONFIG_X86_64
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ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW);
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if (ret != BIOS_STATUS_SUCCESS) {
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dev_err(xp, "uv_bios_change_memprotect(,, "
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"UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret);
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return xpBiosError;
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}
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#else
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#error not a supported configuration
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#endif
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return xpSuccess;
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}
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static enum xp_retval
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xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
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{
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int ret;
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#if defined CONFIG_X86_64
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ret = uv_bios_change_memprotect(phys_addr, size,
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UV_MEMPROT_RESTRICT_ACCESS);
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if (ret != BIOS_STATUS_SUCCESS) {
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dev_err(xp, "uv_bios_change_memprotect(,, "
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"UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret);
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return xpBiosError;
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}
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#else
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#error not a supported configuration
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#endif
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return xpSuccess;
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}
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enum xp_retval
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xp_init_uv(void)
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{
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WARN_ON(!is_uv_system());
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if (!is_uv_system())
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return xpUnsupported;
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xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
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#ifdef CONFIG_X86
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xp_partition_id = sn_partition_id;
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xp_region_size = sn_region_size;
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#endif
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xp_pa = xp_pa_uv;
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xp_socket_pa = xp_socket_pa_uv;
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xp_remote_memcpy = xp_remote_memcpy_uv;
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xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
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xp_expand_memprotect = xp_expand_memprotect_uv;
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xp_restrict_memprotect = xp_restrict_memprotect_uv;
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return xpSuccess;
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}
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void
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xp_exit_uv(void)
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{
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WARN_ON(!is_uv_system());
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}
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