1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * BIOS run time interface routines.
5 * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
6 * Copyright (C) 2007-2017 Silicon Graphics, Inc. All rights reserved.
10 #include <linux/efi.h>
11 #include <linux/export.h>
12 #include <linux/slab.h>
15 #include <asm/pgalloc.h>
16 #include <asm/uv/bios.h>
17 #include <asm/uv/uv_hub.h>
19 unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
21 struct uv_systab *uv_systab;
23 static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
26 struct uv_systab *tab = uv_systab;
29 if (!tab || !tab->function)
31 * BIOS does not support UV systab
33 return BIOS_STATUS_UNIMPLEMENTED;
35 ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
40 static s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4,
45 if (down_interruptible(&__efi_uv_runtime_lock))
46 return BIOS_STATUS_ABORT;
48 ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
49 up(&__efi_uv_runtime_lock);
54 static s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
57 unsigned long bios_flags;
60 if (down_interruptible(&__efi_uv_runtime_lock))
61 return BIOS_STATUS_ABORT;
63 local_irq_save(bios_flags);
64 ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
65 local_irq_restore(bios_flags);
67 up(&__efi_uv_runtime_lock);
73 EXPORT_SYMBOL_GPL(sn_partition_id);
75 EXPORT_SYMBOL_GPL(sn_coherency_id);
77 EXPORT_SYMBOL_GPL(sn_region_size);
78 long system_serial_number;
81 s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
82 long *region, long *ssn)
86 union partition_info_u part;
88 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
89 (u64)(&v0), (u64)(&v1), 0, 0);
90 if (ret != BIOS_STATUS_SUCCESS)
95 *uvtype = part.hub_version;
97 *partid = part.partition_id;
99 *coher = part.coherence_id;
101 *region = part.region_size;
108 uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
109 unsigned long *intr_mmr_offset)
115 * bios returns watchlist number or negative error number.
117 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
118 mq_size, (u64)intr_mmr_offset,
120 if (ret < BIOS_STATUS_SUCCESS)
125 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
128 uv_bios_mq_watchlist_free(int blade, int watchlist_num)
130 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
131 blade, watchlist_num, 0, 0, 0);
133 EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
136 uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
138 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
141 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
144 uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
146 return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
147 (u64)addr, buf, (u64)len, 0);
149 EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
151 s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
153 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
154 (u64)ticks_per_second, 0, 0, 0);
158 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
159 * @decode: true to enable target, false to disable target
160 * @domain: PCI domain number
161 * @bus: PCI bus number
165 * -EINVAL: Invalid domain or bus number
166 * -ENOSYS: Capability not available
167 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time
169 int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
171 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
172 (u64)decode, (u64)domain, (u64)bus, 0, 0);
175 extern s64 uv_bios_get_master_nasid(u64 size, u64 *master_nasid)
177 return uv_bios_call(UV_BIOS_EXTRA, 0, UV_BIOS_EXTRA_MASTER_NASID, 0,
178 size, (u64)master_nasid);
180 EXPORT_SYMBOL_GPL(uv_bios_get_master_nasid);
182 extern s64 uv_bios_get_heapsize(u64 nasid, u64 size, u64 *heap_size)
184 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_GET_HEAPSIZE,
185 0, size, (u64)heap_size);
187 EXPORT_SYMBOL_GPL(uv_bios_get_heapsize);
189 extern s64 uv_bios_install_heap(u64 nasid, u64 heap_size, u64 *bios_heap)
191 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_INSTALL_HEAP,
192 0, heap_size, (u64)bios_heap);
194 EXPORT_SYMBOL_GPL(uv_bios_install_heap);
196 extern s64 uv_bios_obj_count(u64 nasid, u64 size, u64 *objcnt)
198 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_OBJECT_COUNT,
199 0, size, (u64)objcnt);
201 EXPORT_SYMBOL_GPL(uv_bios_obj_count);
203 extern s64 uv_bios_enum_objs(u64 nasid, u64 size, u64 *objbuf)
205 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_OBJECTS,
206 0, size, (u64)objbuf);
208 EXPORT_SYMBOL_GPL(uv_bios_enum_objs);
210 extern s64 uv_bios_enum_ports(u64 nasid, u64 obj_id, u64 size, u64 *portbuf)
212 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_PORTS,
213 obj_id, size, (u64)portbuf);
215 EXPORT_SYMBOL_GPL(uv_bios_enum_ports);
217 extern s64 uv_bios_get_geoinfo(u64 nasid, u64 size, u64 *buf)
219 return uv_bios_call(UV_BIOS_GET_GEOINFO, nasid, (u64)buf, size, 0, 0);
221 EXPORT_SYMBOL_GPL(uv_bios_get_geoinfo);
223 extern s64 uv_bios_get_pci_topology(u64 size, u64 *buf)
225 return uv_bios_call(UV_BIOS_GET_PCI_TOPOLOGY, (u64)buf, size, 0, 0, 0);
227 EXPORT_SYMBOL_GPL(uv_bios_get_pci_topology);
229 unsigned long get_uv_systab_phys(bool msg)
231 if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) ||
232 !uv_systab_phys || efi_runtime_disabled()) {
234 pr_crit("UV: UVsystab: missing\n");
237 return uv_systab_phys;
240 int uv_bios_init(void)
242 unsigned long uv_systab_phys_addr;
245 uv_systab_phys_addr = get_uv_systab_phys(1);
246 if (!uv_systab_phys_addr)
249 uv_systab = ioremap(uv_systab_phys_addr, sizeof(struct uv_systab));
250 if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
251 pr_err("UV: UVsystab: bad signature!\n");
256 /* Starting with UV4 the UV systab size is variable */
257 if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
258 int size = uv_systab->size;
261 uv_systab = ioremap(uv_systab_phys_addr, size);
263 pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
267 pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);