| 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 | s64 ret; |
| 153 | |
| 154 | ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie, |
| 155 | (u64)addr, buf, (u64)len, 0); |
| 156 | return ret; |
| 157 | } |
| 158 | EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa); |
| 159 | |
| 160 | s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) |
| 161 | { |
| 162 | return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, |
| 163 | (u64)ticks_per_second, 0, 0, 0); |
| 164 | } |
| 165 | EXPORT_SYMBOL_GPL(uv_bios_freq_base); |
| 166 | |
| 167 | /* |
| 168 | * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target |
| 169 | * @decode: true to enable target, false to disable target |
| 170 | * @domain: PCI domain number |
| 171 | * @bus: PCI bus number |
| 172 | * |
| 173 | * Returns: |
| 174 | * 0: Success |
| 175 | * -EINVAL: Invalid domain or bus number |
| 176 | * -ENOSYS: Capability not available |
| 177 | * -EBUSY: Legacy VGA I/O cannot be retargeted at this time |
| 178 | */ |
| 179 | int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus) |
| 180 | { |
| 181 | return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET, |
| 182 | (u64)decode, (u64)domain, (u64)bus, 0, 0); |
| 183 | } |
| 184 | EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target); |
| 185 | |
| 186 | #ifdef CONFIG_EFI |
| 187 | void uv_bios_init(void) |
| 188 | { |
| 189 | uv_systab = NULL; |
| 190 | if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || !efi.uv_systab) { |
| 191 | pr_crit("UV: UVsystab: missing\n"); |
| 192 | return; |
| 193 | } |
| 194 | |
| 195 | uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab)); |
| 196 | if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) { |
| 197 | pr_err("UV: UVsystab: bad signature!\n"); |
| 198 | iounmap(uv_systab); |
| 199 | return; |
| 200 | } |
| 201 | |
| 202 | if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) { |
| 203 | iounmap(uv_systab); |
| 204 | uv_systab = ioremap(efi.uv_systab, uv_systab->size); |
| 205 | if (!uv_systab) { |
| 206 | pr_err("UV: UVsystab: ioremap(%d) failed!\n", |
| 207 | uv_systab->size); |
| 208 | return; |
| 209 | } |
| 210 | } |
| 211 | pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision); |
| 212 | } |
| 213 | #endif |