linux/arch/x86/platform/uv/bios_uv.c
Justin Ernst 9a3c425cfd x86/platform/uv: Add and export uv_bios_* functions
Add additional uv_bios_call() variant functions to expose information
needed by the new uv_sysfs driver. This includes the addition of several
new data types defined by UV BIOS and used in the new functions.

Signed-off-by: Justin Ernst <justin.ernst@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Steve Wahl <steve.wahl@hpe.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lkml.kernel.org/r/20201125175444.279074-3-justin.ernst@hpe.com
2020-11-26 12:50:44 +01:00

270 lines
6.6 KiB
C

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