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 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. 7 */ 8 9 /* 10 * Cross Partition (XP) uv-based functions. 11 * 12 * Architecture specific implementation of common functions. 13 * 14 */ 15 16 #include <linux/device.h> 17 #include <asm/uv/uv_hub.h> 18 #if defined CONFIG_X86_64 19 #include <asm/uv/bios.h> 20 #elif defined CONFIG_IA64_SGI_UV 21 #include <asm/sn/sn_sal.h> 22 #endif 23 #include "../sgi-gru/grukservices.h" 24 #include "xp.h" 25 26 /* 27 * Convert a virtual memory address to a physical memory address. 28 */ 29 static unsigned long 30 xp_pa_uv(void *addr) 31 { 32 return uv_gpa(addr); 33 } 34 35 /* 36 * Convert a global physical to socket physical address. 37 */ 38 static unsigned long 39 xp_socket_pa_uv(unsigned long gpa) 40 { 41 return uv_gpa_to_soc_phys_ram(gpa); 42 } 43 44 static enum xp_retval 45 xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa, 46 size_t len) 47 { 48 int ret; 49 unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa)); 50 51 BUG_ON(!uv_gpa_in_mmr_space(src_gpa)); 52 BUG_ON(len != 8); 53 54 ret = gru_read_gpa(dst_va, src_gpa); 55 if (ret == 0) 56 return xpSuccess; 57 58 dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx " 59 "len=%ld\n", dst_gpa, src_gpa, len); 60 return xpGruCopyError; 61 } 62 63 64 static enum xp_retval 65 xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa, 66 size_t len) 67 { 68 int ret; 69 70 if (uv_gpa_in_mmr_space(src_gpa)) 71 return xp_remote_mmr_read(dst_gpa, src_gpa, len); 72 73 ret = gru_copy_gpa(dst_gpa, src_gpa, len); 74 if (ret == 0) 75 return xpSuccess; 76 77 dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx " 78 "len=%ld\n", dst_gpa, src_gpa, len); 79 return xpGruCopyError; 80 } 81 82 static int 83 xp_cpu_to_nasid_uv(int cpuid) 84 { 85 /* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */ 86 return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid)); 87 } 88 89 static enum xp_retval 90 xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size) 91 { 92 int ret; 93 94 #if defined CONFIG_X86_64 95 ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW); 96 if (ret != BIOS_STATUS_SUCCESS) { 97 dev_err(xp, "uv_bios_change_memprotect(,, " 98 "UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret); 99 return xpBiosError; 100 } 101 102 #elif defined CONFIG_IA64_SGI_UV 103 u64 nasid_array; 104 105 ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1, 106 &nasid_array); 107 if (ret != 0) { 108 dev_err(xp, "sn_change_memprotect(,, " 109 "SN_MEMPROT_ACCESS_CLASS_1,) failed ret=%d\n", ret); 110 return xpSalError; 111 } 112 #else 113 #error not a supported configuration 114 #endif 115 return xpSuccess; 116 } 117 118 static enum xp_retval 119 xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size) 120 { 121 int ret; 122 123 #if defined CONFIG_X86_64 124 ret = uv_bios_change_memprotect(phys_addr, size, 125 UV_MEMPROT_RESTRICT_ACCESS); 126 if (ret != BIOS_STATUS_SUCCESS) { 127 dev_err(xp, "uv_bios_change_memprotect(,, " 128 "UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret); 129 return xpBiosError; 130 } 131 132 #elif defined CONFIG_IA64_SGI_UV 133 u64 nasid_array; 134 135 ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0, 136 &nasid_array); 137 if (ret != 0) { 138 dev_err(xp, "sn_change_memprotect(,, " 139 "SN_MEMPROT_ACCESS_CLASS_0,) failed ret=%d\n", ret); 140 return xpSalError; 141 } 142 #else 143 #error not a supported configuration 144 #endif 145 return xpSuccess; 146 } 147 148 enum xp_retval 149 xp_init_uv(void) 150 { 151 BUG_ON(!is_uv()); 152 153 xp_max_npartitions = XP_MAX_NPARTITIONS_UV; 154 #ifdef CONFIG_X86 155 xp_partition_id = sn_partition_id; 156 xp_region_size = sn_region_size; 157 #endif 158 xp_pa = xp_pa_uv; 159 xp_socket_pa = xp_socket_pa_uv; 160 xp_remote_memcpy = xp_remote_memcpy_uv; 161 xp_cpu_to_nasid = xp_cpu_to_nasid_uv; 162 xp_expand_memprotect = xp_expand_memprotect_uv; 163 xp_restrict_memprotect = xp_restrict_memprotect_uv; 164 165 return xpSuccess; 166 } 167 168 void 169 xp_exit_uv(void) 170 { 171 BUG_ON(!is_uv()); 172 } 173