arch/x86/platform/uv/bios

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This source file includes following definitions.
__uv_bios_call
uv_bios_call
uv_bios_call_irqsave
uv_bios_get_sn_info
uv_bios_mq_watchlist_alloc
uv_bios_mq_watchlist_free
uv_bios_change_memprotect
uv_bios_reserved_page_pa
uv_bios_freq_base
uv_bios_set_legacy_vga_target
uv_bios_init
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * BIOS run time interface routines.
   4  *
   5  *  Copyright (c) 2008-2009 Silicon Graphics, Inc.  All Rights Reserved.
   6  *  Copyright (c) Russ Anderson <rja@sgi.com>
   7  */
   8 
   9 #include <linux/efi.h>
  10 #include <linux/export.h>
  11 #include <linux/slab.h>
  12 #include <asm/efi.h>
  13 #include <linux/io.h>
  14 #include <asm/uv/bios.h>
  15 #include <asm/uv/uv_hub.h>
  16 
  17 unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
  18 
  19 struct uv_systab *uv_systab;
  20 
  21 static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
  22                         u64 a4, u64 a5)
  23 {
  24         struct uv_systab *tab = uv_systab;
  25         s64 ret;
  26 
  27         if (!tab || !tab->function)
  28                 /*
  29                  * BIOS does not support UV systab
  30                  */
  31                 return BIOS_STATUS_UNIMPLEMENTED;
  32 
  33         /*
  34          * If EFI_OLD_MEMMAP is set, we need to fall back to using our old EFI
  35          * callback method, which uses efi_call() directly, with the kernel page tables:
  36          */
  37         if (unlikely(efi_enabled(EFI_OLD_MEMMAP)))
  38                 ret = efi_call((void *)__va(tab->function), (u64)which, a1, a2, a3, a4, a5);
  39         else
  40                 ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
  41 
  42         return ret;
  43 }
  44 
  45 s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
  46 {
  47         s64 ret;
  48 
  49         if (down_interruptible(&__efi_uv_runtime_lock))
  50                 return BIOS_STATUS_ABORT;
  51 
  52         ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
  53         up(&__efi_uv_runtime_lock);
  54 
  55         return ret;
  56 }
  57 EXPORT_SYMBOL_GPL(uv_bios_call);
  58 
  59 s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
  60                                         u64 a4, u64 a5)
  61 {
  62         unsigned long bios_flags;
  63         s64 ret;
  64 
  65         if (down_interruptible(&__efi_uv_runtime_lock))
  66                 return BIOS_STATUS_ABORT;
  67 
  68         local_irq_save(bios_flags);
  69         ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
  70         local_irq_restore(bios_flags);
  71 
  72         up(&__efi_uv_runtime_lock);
  73 
  74         return ret;
  75 }
  76 
  77 
  78 long sn_partition_id;
  79 EXPORT_SYMBOL_GPL(sn_partition_id);
  80 long sn_coherency_id;
  81 EXPORT_SYMBOL_GPL(sn_coherency_id);
  82 long sn_region_size;
  83 EXPORT_SYMBOL_GPL(sn_region_size);
  84 long system_serial_number;
  85 EXPORT_SYMBOL_GPL(system_serial_number);
  86 int uv_type;
  87 EXPORT_SYMBOL_GPL(uv_type);
  88 
  89 
  90 s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
  91                 long *region, long *ssn)
  92 {
  93         s64 ret;
  94         u64 v0, v1;
  95         union partition_info_u part;
  96 
  97         ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
  98                                 (u64)(&v0), (u64)(&v1), 0, 0);
  99         if (ret != BIOS_STATUS_SUCCESS)
 100                 return ret;
 101 
 102         part.val = v0;
 103         if (uvtype)
 104                 *uvtype = part.hub_version;
 105         if (partid)
 106                 *partid = part.partition_id;
 107         if (coher)
 108                 *coher = part.coherence_id;
 109         if (region)
 110                 *region = part.region_size;
 111         if (ssn)
 112                 *ssn = v1;
 113         return ret;
 114 }
 115 EXPORT_SYMBOL_GPL(uv_bios_get_sn_info);
 116 
 117 int
 118 uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
 119                            unsigned long *intr_mmr_offset)
 120 {
 121         u64 watchlist;
 122         s64 ret;
 123 
 124         /*
 125          * bios returns watchlist number or negative error number.
 126          */
 127         ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
 128                         mq_size, (u64)intr_mmr_offset,
 129                         (u64)&watchlist, 0);
 130         if (ret < BIOS_STATUS_SUCCESS)
 131                 return ret;
 132 
 133         return watchlist;
 134 }
 135 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
 136 
 137 int
 138 uv_bios_mq_watchlist_free(int blade, int watchlist_num)
 139 {
 140         return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
 141                                 blade, watchlist_num, 0, 0, 0);
 142 }
 143 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
 144 
 145 s64
 146 uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
 147 {
 148         return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
 149                                         perms, 0, 0);
 150 }
 151 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
 152 
 153 s64
 154 uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
 155 {
 156         return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
 157                                     (u64)addr, buf, (u64)len, 0);
 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 void uv_bios_init(void)
 188 {
 189         uv_systab = NULL;
 190         if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) ||
 191             !uv_systab_phys || efi_runtime_disabled()) {
 192                 pr_crit("UV: UVsystab: missing\n");
 193                 return;
 194         }
 195 
 196         uv_systab = ioremap(uv_systab_phys, 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         /* Starting with UV4 the UV systab size is variable */
 204         if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
 205                 int size = uv_systab->size;
 206 
 207                 iounmap(uv_systab);
 208                 uv_systab = ioremap(uv_systab_phys, size);
 209                 if (!uv_systab) {
 210                         pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
 211                         return;
 212                 }
 213         }
 214         pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);
 215 }
/* [<][>][^][v][top][bottom][index][help] */
root/arch/x86/platform/uv/bios_uv.c

DEFINITIONS
