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((void *)__va(tab->function), (u64)which, 44 a1, a2, a3, a4, a5); 45 return ret; 46 } 47 EXPORT_SYMBOL_GPL(uv_bios_call); 48 49 s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, 50 u64 a4, u64 a5) 51 { 52 unsigned long bios_flags; 53 s64 ret; 54 55 local_irq_save(bios_flags); 56 ret = uv_bios_call(which, a1, a2, a3, a4, a5); 57 local_irq_restore(bios_flags); 58 59 return ret; 60 } 61 62 s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, 63 u64 a4, u64 a5) 64 { 65 s64 ret; 66 67 preempt_disable(); 68 ret = uv_bios_call(which, a1, a2, a3, a4, a5); 69 preempt_enable(); 70 71 return ret; 72 } 73 74 75 long sn_partition_id; 76 EXPORT_SYMBOL_GPL(sn_partition_id); 77 long sn_coherency_id; 78 EXPORT_SYMBOL_GPL(sn_coherency_id); 79 long sn_region_size; 80 EXPORT_SYMBOL_GPL(sn_region_size); 81 long system_serial_number; 82 EXPORT_SYMBOL_GPL(system_serial_number); 83 int uv_type; 84 EXPORT_SYMBOL_GPL(uv_type); 85 86 87 s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher, 88 long *region, long *ssn) 89 { 90 s64 ret; 91 u64 v0, v1; 92 union partition_info_u part; 93 94 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc, 95 (u64)(&v0), (u64)(&v1), 0, 0); 96 if (ret != BIOS_STATUS_SUCCESS) 97 return ret; 98 99 part.val = v0; 100 if (uvtype) 101 *uvtype = part.hub_version; 102 if (partid) 103 *partid = part.partition_id; 104 if (coher) 105 *coher = part.coherence_id; 106 if (region) 107 *region = part.region_size; 108 if (ssn) 109 *ssn = v1; 110 return ret; 111 } 112 EXPORT_SYMBOL_GPL(uv_bios_get_sn_info); 113 114 int 115 uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size, 116 unsigned long *intr_mmr_offset) 117 { 118 u64 watchlist; 119 s64 ret; 120 121 /* 122 * bios returns watchlist number or negative error number. 123 */ 124 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr, 125 mq_size, (u64)intr_mmr_offset, 126 (u64)&watchlist, 0); 127 if (ret < BIOS_STATUS_SUCCESS) 128 return ret; 129 130 return watchlist; 131 } 132 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc); 133 134 int 135 uv_bios_mq_watchlist_free(int blade, int watchlist_num) 136 { 137 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE, 138 blade, watchlist_num, 0, 0, 0); 139 } 140 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free); 141 142 s64 143 uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms) 144 { 145 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len, 146 perms, 0, 0); 147 } 148 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect); 149 150 s64 151 uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len) 152 { 153 s64 ret; 154 155 ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie, 156 (u64)addr, buf, (u64)len, 0); 157 return ret; 158 } 159 EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa); 160 161 s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) 162 { 163 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, 164 (u64)ticks_per_second, 0, 0, 0); 165 } 166 EXPORT_SYMBOL_GPL(uv_bios_freq_base); 167 168 /* 169 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target 170 * @decode: true to enable target, false to disable target 171 * @domain: PCI domain number 172 * @bus: PCI bus number 173 * 174 * Returns: 175 * 0: Success 176 * -EINVAL: Invalid domain or bus number 177 * -ENOSYS: Capability not available 178 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time 179 */ 180 int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus) 181 { 182 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET, 183 (u64)decode, (u64)domain, (u64)bus, 0, 0); 184 } 185 EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target); 186 187 #ifdef CONFIG_EFI 188 void uv_bios_init(void) 189 { 190 uv_systab = NULL; 191 if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || !efi.uv_systab) { 192 pr_crit("UV: UVsystab: missing\n"); 193 return; 194 } 195 196 uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab)); 197 if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) { 198 pr_err("UV: UVsystab: bad signature!\n"); 199 iounmap(uv_systab); 200 return; 201 } 202 203 if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) { 204 iounmap(uv_systab); 205 uv_systab = ioremap(efi.uv_systab, uv_systab->size); 206 if (!uv_systab) { 207 pr_err("UV: UVsystab: ioremap(%d) failed!\n", 208 uv_systab->size); 209 return; 210 } 211 } 212 pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision); 213 } 214 #endif 215