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 /* 44 * If EFI_OLD_MEMMAP is set, we need to fall back to using our old EFI 45 * callback method, which uses efi_call() directly, with the kernel page tables: 46 */ 47 if (unlikely(test_bit(EFI_OLD_MEMMAP, &efi.flags))) 48 ret = efi_call((void *)__va(tab->function), (u64)which, a1, a2, a3, a4, a5); 49 else 50 ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5); 51 52 return ret; 53 } 54 EXPORT_SYMBOL_GPL(uv_bios_call); 55 56 s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, 57 u64 a4, u64 a5) 58 { 59 unsigned long bios_flags; 60 s64 ret; 61 62 local_irq_save(bios_flags); 63 ret = uv_bios_call(which, a1, a2, a3, a4, a5); 64 local_irq_restore(bios_flags); 65 66 return ret; 67 } 68 69 s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, 70 u64 a4, u64 a5) 71 { 72 s64 ret; 73 74 preempt_disable(); 75 ret = uv_bios_call(which, a1, a2, a3, a4, a5); 76 preempt_enable(); 77 78 return ret; 79 } 80 81 82 long sn_partition_id; 83 EXPORT_SYMBOL_GPL(sn_partition_id); 84 long sn_coherency_id; 85 EXPORT_SYMBOL_GPL(sn_coherency_id); 86 long sn_region_size; 87 EXPORT_SYMBOL_GPL(sn_region_size); 88 long system_serial_number; 89 EXPORT_SYMBOL_GPL(system_serial_number); 90 int uv_type; 91 EXPORT_SYMBOL_GPL(uv_type); 92 93 94 s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher, 95 long *region, long *ssn) 96 { 97 s64 ret; 98 u64 v0, v1; 99 union partition_info_u part; 100 101 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc, 102 (u64)(&v0), (u64)(&v1), 0, 0); 103 if (ret != BIOS_STATUS_SUCCESS) 104 return ret; 105 106 part.val = v0; 107 if (uvtype) 108 *uvtype = part.hub_version; 109 if (partid) 110 *partid = part.partition_id; 111 if (coher) 112 *coher = part.coherence_id; 113 if (region) 114 *region = part.region_size; 115 if (ssn) 116 *ssn = v1; 117 return ret; 118 } 119 EXPORT_SYMBOL_GPL(uv_bios_get_sn_info); 120 121 int 122 uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size, 123 unsigned long *intr_mmr_offset) 124 { 125 u64 watchlist; 126 s64 ret; 127 128 /* 129 * bios returns watchlist number or negative error number. 130 */ 131 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr, 132 mq_size, (u64)intr_mmr_offset, 133 (u64)&watchlist, 0); 134 if (ret < BIOS_STATUS_SUCCESS) 135 return ret; 136 137 return watchlist; 138 } 139 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc); 140 141 int 142 uv_bios_mq_watchlist_free(int blade, int watchlist_num) 143 { 144 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE, 145 blade, watchlist_num, 0, 0, 0); 146 } 147 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free); 148 149 s64 150 uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms) 151 { 152 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len, 153 perms, 0, 0); 154 } 155 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect); 156 157 s64 158 uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len) 159 { 160 return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie, 161 (u64)addr, buf, (u64)len, 0); 162 } 163 EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa); 164 165 s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) 166 { 167 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, 168 (u64)ticks_per_second, 0, 0, 0); 169 } 170 EXPORT_SYMBOL_GPL(uv_bios_freq_base); 171 172 /* 173 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target 174 * @decode: true to enable target, false to disable target 175 * @domain: PCI domain number 176 * @bus: PCI bus number 177 * 178 * Returns: 179 * 0: Success 180 * -EINVAL: Invalid domain or bus number 181 * -ENOSYS: Capability not available 182 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time 183 */ 184 int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus) 185 { 186 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET, 187 (u64)decode, (u64)domain, (u64)bus, 0, 0); 188 } 189 EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target); 190 191 #ifdef CONFIG_EFI 192 void uv_bios_init(void) 193 { 194 uv_systab = NULL; 195 if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || 196 !efi.uv_systab || efi_runtime_disabled()) { 197 pr_crit("UV: UVsystab: missing\n"); 198 return; 199 } 200 201 uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab)); 202 if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) { 203 pr_err("UV: UVsystab: bad signature!\n"); 204 iounmap(uv_systab); 205 return; 206 } 207 208 /* Starting with UV4 the UV systab size is variable */ 209 if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) { 210 int size = uv_systab->size; 211 212 iounmap(uv_systab); 213 uv_systab = ioremap(efi.uv_systab, size); 214 if (!uv_systab) { 215 pr_err("UV: UVsystab: ioremap(%d) failed!\n", size); 216 return; 217 } 218 } 219 pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision); 220 } 221 #endif 222