1 /* 2 * BIOS run time interface routines. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 * 18 * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved. 19 * Copyright (c) Russ Anderson <rja@sgi.com> 20 */ 21 22 #include <linux/efi.h> 23 #include <linux/export.h> 24 #include <linux/slab.h> 25 #include <asm/efi.h> 26 #include <linux/io.h> 27 #include <asm/uv/bios.h> 28 #include <asm/uv/uv_hub.h> 29 30 struct uv_systab *uv_systab; 31 32 s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5) 33 { 34 struct uv_systab *tab = uv_systab; 35 s64 ret; 36 37 if (!tab || !tab->function) 38 /* 39 * BIOS does not support UV systab 40 */ 41 return BIOS_STATUS_UNIMPLEMENTED; 42 43 ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5); 44 return ret; 45 } 46 EXPORT_SYMBOL_GPL(uv_bios_call); 47 48 s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, 49 u64 a4, u64 a5) 50 { 51 unsigned long bios_flags; 52 s64 ret; 53 54 local_irq_save(bios_flags); 55 ret = uv_bios_call(which, a1, a2, a3, a4, a5); 56 local_irq_restore(bios_flags); 57 58 return ret; 59 } 60 61 s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, 62 u64 a4, u64 a5) 63 { 64 s64 ret; 65 66 preempt_disable(); 67 ret = uv_bios_call(which, a1, a2, a3, a4, a5); 68 preempt_enable(); 69 70 return ret; 71 } 72 73 74 long sn_partition_id; 75 EXPORT_SYMBOL_GPL(sn_partition_id); 76 long sn_coherency_id; 77 EXPORT_SYMBOL_GPL(sn_coherency_id); 78 long sn_region_size; 79 EXPORT_SYMBOL_GPL(sn_region_size); 80 long system_serial_number; 81 EXPORT_SYMBOL_GPL(system_serial_number); 82 int uv_type; 83 EXPORT_SYMBOL_GPL(uv_type); 84 85 86 s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher, 87 long *region, long *ssn) 88 { 89 s64 ret; 90 u64 v0, v1; 91 union partition_info_u part; 92 93 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc, 94 (u64)(&v0), (u64)(&v1), 0, 0); 95 if (ret != BIOS_STATUS_SUCCESS) 96 return ret; 97 98 part.val = v0; 99 if (uvtype) 100 *uvtype = part.hub_version; 101 if (partid) 102 *partid = part.partition_id; 103 if (coher) 104 *coher = part.coherence_id; 105 if (region) 106 *region = part.region_size; 107 if (ssn) 108 *ssn = v1; 109 return ret; 110 } 111 EXPORT_SYMBOL_GPL(uv_bios_get_sn_info); 112 113 int 114 uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size, 115 unsigned long *intr_mmr_offset) 116 { 117 u64 watchlist; 118 s64 ret; 119 120 /* 121 * bios returns watchlist number or negative error number. 122 */ 123 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr, 124 mq_size, (u64)intr_mmr_offset, 125 (u64)&watchlist, 0); 126 if (ret < BIOS_STATUS_SUCCESS) 127 return ret; 128 129 return watchlist; 130 } 131 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc); 132 133 int 134 uv_bios_mq_watchlist_free(int blade, int watchlist_num) 135 { 136 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE, 137 blade, watchlist_num, 0, 0, 0); 138 } 139 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free); 140 141 s64 142 uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms) 143 { 144 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len, 145 perms, 0, 0); 146 } 147 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect); 148 149 s64 150 uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len) 151 { 152 return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie, 153 (u64)addr, buf, (u64)len, 0); 154 } 155 EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa); 156 157 s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) 158 { 159 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, 160 (u64)ticks_per_second, 0, 0, 0); 161 } 162 EXPORT_SYMBOL_GPL(uv_bios_freq_base); 163 164 /* 165 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target 166 * @decode: true to enable target, false to disable target 167 * @domain: PCI domain number 168 * @bus: PCI bus number 169 * 170 * Returns: 171 * 0: Success 172 * -EINVAL: Invalid domain or bus number 173 * -ENOSYS: Capability not available 174 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time 175 */ 176 int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus) 177 { 178 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET, 179 (u64)decode, (u64)domain, (u64)bus, 0, 0); 180 } 181 EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target); 182 183 #ifdef CONFIG_EFI 184 void uv_bios_init(void) 185 { 186 uv_systab = NULL; 187 if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || 188 !efi.uv_systab || efi_runtime_disabled()) { 189 pr_crit("UV: UVsystab: missing\n"); 190 return; 191 } 192 193 uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab)); 194 if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) { 195 pr_err("UV: UVsystab: bad signature!\n"); 196 iounmap(uv_systab); 197 return; 198 } 199 200 /* Starting with UV4 the UV systab size is variable */ 201 if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) { 202 int size = uv_systab->size; 203 204 iounmap(uv_systab); 205 uv_systab = ioremap(efi.uv_systab, size); 206 if (!uv_systab) { 207 pr_err("UV: UVsystab: ioremap(%d) failed!\n", size); 208 return; 209 } 210 } 211 pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision); 212 } 213 #endif 214