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