1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * (C) Copyright 2020 Hewlett Packard Enterprise Development LP 7 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. 8 */ 9 10 /* 11 * Cross Partition (XP) uv-based functions. 12 * 13 * Architecture specific implementation of common functions. 14 * 15 */ 16 17 #include <linux/device.h> 18 #include <asm/uv/uv_hub.h> 19 #if defined CONFIG_X86_64 20 #include <asm/uv/bios.h> 21 #endif 22 #include "../sgi-gru/grukservices.h" 23 #include "xp.h" 24 25 /* 26 * Convert a virtual memory address to a physical memory address. 27 */ 28 static unsigned long 29 xp_pa_uv(void *addr) 30 { 31 return uv_gpa(addr); 32 } 33 34 /* 35 * Convert a global physical to socket physical address. 36 */ 37 static unsigned long 38 xp_socket_pa_uv(unsigned long gpa) 39 { 40 return uv_gpa_to_soc_phys_ram(gpa); 41 } 42 43 static enum xp_retval 44 xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa, 45 size_t len) 46 { 47 int ret; 48 unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa)); 49 50 BUG_ON(!uv_gpa_in_mmr_space(src_gpa)); 51 BUG_ON(len != 8); 52 53 ret = gru_read_gpa(dst_va, src_gpa); 54 if (ret == 0) 55 return xpSuccess; 56 57 dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx " 58 "len=%ld\n", dst_gpa, src_gpa, len); 59 return xpGruCopyError; 60 } 61 62 63 static enum xp_retval 64 xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa, 65 size_t len) 66 { 67 int ret; 68 69 if (uv_gpa_in_mmr_space(src_gpa)) 70 return xp_remote_mmr_read(dst_gpa, src_gpa, len); 71 72 ret = gru_copy_gpa(dst_gpa, src_gpa, len); 73 if (ret == 0) 74 return xpSuccess; 75 76 dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx " 77 "len=%ld\n", dst_gpa, src_gpa, len); 78 return xpGruCopyError; 79 } 80 81 static int 82 xp_cpu_to_nasid_uv(int cpuid) 83 { 84 /* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */ 85 return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid)); 86 } 87 88 static enum xp_retval 89 xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size) 90 { 91 int ret; 92 93 #if defined CONFIG_X86_64 94 ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW); 95 if (ret != BIOS_STATUS_SUCCESS) { 96 dev_err(xp, "uv_bios_change_memprotect(,, " 97 "UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret); 98 return xpBiosError; 99 } 100 #else 101 #error not a supported configuration 102 #endif 103 return xpSuccess; 104 } 105 106 static enum xp_retval 107 xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size) 108 { 109 int ret; 110 111 #if defined CONFIG_X86_64 112 ret = uv_bios_change_memprotect(phys_addr, size, 113 UV_MEMPROT_RESTRICT_ACCESS); 114 if (ret != BIOS_STATUS_SUCCESS) { 115 dev_err(xp, "uv_bios_change_memprotect(,, " 116 "UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret); 117 return xpBiosError; 118 } 119 #else 120 #error not a supported configuration 121 #endif 122 return xpSuccess; 123 } 124 125 enum xp_retval 126 xp_init_uv(void) 127 { 128 WARN_ON(!is_uv_system()); 129 if (!is_uv_system()) 130 return xpUnsupported; 131 132 xp_max_npartitions = XP_MAX_NPARTITIONS_UV; 133 #ifdef CONFIG_X86 134 xp_partition_id = sn_partition_id; 135 xp_region_size = sn_region_size; 136 #endif 137 xp_pa = xp_pa_uv; 138 xp_socket_pa = xp_socket_pa_uv; 139 xp_remote_memcpy = xp_remote_memcpy_uv; 140 xp_cpu_to_nasid = xp_cpu_to_nasid_uv; 141 xp_expand_memprotect = xp_expand_memprotect_uv; 142 xp_restrict_memprotect = xp_restrict_memprotect_uv; 143 144 return xpSuccess; 145 } 146 147 void 148 xp_exit_uv(void) 149 { 150 WARN_ON(!is_uv_system()); 151 } 152