270 lines
6.6 KiB
C
270 lines
6.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* BIOS run time interface routines.
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*
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* (C) Copyright 2020 Hewlett Packard Enterprise Development LP
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* Copyright (C) 2007-2017 Silicon Graphics, Inc. All rights reserved.
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* Copyright (c) Russ Anderson <rja@sgi.com>
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*/
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#include <linux/efi.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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#include <asm/efi.h>
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#include <linux/io.h>
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#include <asm/pgalloc.h>
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#include <asm/uv/bios.h>
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#include <asm/uv/uv_hub.h>
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unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
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struct uv_systab *uv_systab;
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static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
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u64 a4, u64 a5)
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{
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struct uv_systab *tab = uv_systab;
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s64 ret;
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if (!tab || !tab->function)
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/*
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* BIOS does not support UV systab
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*/
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return BIOS_STATUS_UNIMPLEMENTED;
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ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
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return ret;
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}
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static s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4,
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u64 a5)
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{
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s64 ret;
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if (down_interruptible(&__efi_uv_runtime_lock))
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return BIOS_STATUS_ABORT;
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ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
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up(&__efi_uv_runtime_lock);
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return ret;
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}
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static s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
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u64 a4, u64 a5)
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{
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unsigned long bios_flags;
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s64 ret;
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if (down_interruptible(&__efi_uv_runtime_lock))
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return BIOS_STATUS_ABORT;
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local_irq_save(bios_flags);
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ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
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local_irq_restore(bios_flags);
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up(&__efi_uv_runtime_lock);
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return ret;
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}
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long sn_partition_id;
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EXPORT_SYMBOL_GPL(sn_partition_id);
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long sn_coherency_id;
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EXPORT_SYMBOL_GPL(sn_coherency_id);
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long sn_region_size;
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EXPORT_SYMBOL_GPL(sn_region_size);
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long system_serial_number;
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int uv_type;
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s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
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long *region, long *ssn)
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{
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s64 ret;
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u64 v0, v1;
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union partition_info_u part;
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ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
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(u64)(&v0), (u64)(&v1), 0, 0);
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if (ret != BIOS_STATUS_SUCCESS)
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return ret;
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part.val = v0;
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if (uvtype)
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*uvtype = part.hub_version;
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if (partid)
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*partid = part.partition_id;
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if (coher)
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*coher = part.coherence_id;
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if (region)
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*region = part.region_size;
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if (ssn)
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*ssn = v1;
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return ret;
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}
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int
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uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
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unsigned long *intr_mmr_offset)
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{
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u64 watchlist;
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s64 ret;
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/*
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* bios returns watchlist number or negative error number.
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*/
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ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
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mq_size, (u64)intr_mmr_offset,
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(u64)&watchlist, 0);
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if (ret < BIOS_STATUS_SUCCESS)
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return ret;
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return watchlist;
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}
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EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
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int
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uv_bios_mq_watchlist_free(int blade, int watchlist_num)
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{
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return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
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blade, watchlist_num, 0, 0, 0);
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}
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EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
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s64
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uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
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{
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return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
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perms, 0, 0);
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}
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EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
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s64
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uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
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{
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return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
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(u64)addr, buf, (u64)len, 0);
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}
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EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
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s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
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{
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return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
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(u64)ticks_per_second, 0, 0, 0);
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}
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/*
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* uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
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* @decode: true to enable target, false to disable target
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* @domain: PCI domain number
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* @bus: PCI bus number
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*
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* Returns:
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* 0: Success
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* -EINVAL: Invalid domain or bus number
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* -ENOSYS: Capability not available
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* -EBUSY: Legacy VGA I/O cannot be retargeted at this time
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*/
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int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
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{
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return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
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(u64)decode, (u64)domain, (u64)bus, 0, 0);
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}
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extern s64 uv_bios_get_master_nasid(u64 size, u64 *master_nasid)
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{
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return uv_bios_call(UV_BIOS_EXTRA, 0, UV_BIOS_EXTRA_MASTER_NASID, 0,
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size, (u64)master_nasid);
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}
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EXPORT_SYMBOL_GPL(uv_bios_get_master_nasid);
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extern s64 uv_bios_get_heapsize(u64 nasid, u64 size, u64 *heap_size)
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{
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return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_GET_HEAPSIZE,
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0, size, (u64)heap_size);
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}
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EXPORT_SYMBOL_GPL(uv_bios_get_heapsize);
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extern s64 uv_bios_install_heap(u64 nasid, u64 heap_size, u64 *bios_heap)
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{
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return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_INSTALL_HEAP,
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0, heap_size, (u64)bios_heap);
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}
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EXPORT_SYMBOL_GPL(uv_bios_install_heap);
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extern s64 uv_bios_obj_count(u64 nasid, u64 size, u64 *objcnt)
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{
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return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_OBJECT_COUNT,
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0, size, (u64)objcnt);
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}
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EXPORT_SYMBOL_GPL(uv_bios_obj_count);
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extern s64 uv_bios_enum_objs(u64 nasid, u64 size, u64 *objbuf)
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{
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return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_OBJECTS,
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0, size, (u64)objbuf);
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}
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EXPORT_SYMBOL_GPL(uv_bios_enum_objs);
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extern s64 uv_bios_enum_ports(u64 nasid, u64 obj_id, u64 size, u64 *portbuf)
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{
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return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_PORTS,
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obj_id, size, (u64)portbuf);
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}
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EXPORT_SYMBOL_GPL(uv_bios_enum_ports);
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extern s64 uv_bios_get_geoinfo(u64 nasid, u64 size, u64 *buf)
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{
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return uv_bios_call(UV_BIOS_GET_GEOINFO, nasid, (u64)buf, size, 0, 0);
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}
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EXPORT_SYMBOL_GPL(uv_bios_get_geoinfo);
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extern s64 uv_bios_get_pci_topology(u64 size, u64 *buf)
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{
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return uv_bios_call(UV_BIOS_GET_PCI_TOPOLOGY, (u64)buf, size, 0, 0, 0);
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}
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EXPORT_SYMBOL_GPL(uv_bios_get_pci_topology);
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unsigned long get_uv_systab_phys(bool msg)
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{
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if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) ||
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!uv_systab_phys || efi_runtime_disabled()) {
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if (msg)
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pr_crit("UV: UVsystab: missing\n");
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return 0;
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}
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return uv_systab_phys;
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}
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int uv_bios_init(void)
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{
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unsigned long uv_systab_phys_addr;
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uv_systab = NULL;
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uv_systab_phys_addr = get_uv_systab_phys(1);
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if (!uv_systab_phys_addr)
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return -EEXIST;
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uv_systab = ioremap(uv_systab_phys_addr, sizeof(struct uv_systab));
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if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
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pr_err("UV: UVsystab: bad signature!\n");
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iounmap(uv_systab);
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return -EINVAL;
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}
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/* Starting with UV4 the UV systab size is variable */
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if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
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int size = uv_systab->size;
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iounmap(uv_systab);
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uv_systab = ioremap(uv_systab_phys_addr, size);
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if (!uv_systab) {
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pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
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return -EFAULT;
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}
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}
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pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);
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return 0;
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}
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