diff options
Diffstat (limited to 'arch/x86/platform/uv/bios_uv.c')
| -rw-r--r-- | arch/x86/platform/uv/bios_uv.c | 160 |
1 files changed, 104 insertions, 56 deletions
diff --git a/arch/x86/platform/uv/bios_uv.c b/arch/x86/platform/uv/bios_uv.c index 4a6a5a26c582..bf31af3d32d6 100644 --- a/arch/x86/platform/uv/bios_uv.c +++ b/arch/x86/platform/uv/bios_uv.c @@ -1,22 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * BIOS run time interface routines. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved. - * Copyright (c) Russ Anderson <rja@sgi.com> + * (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> @@ -24,12 +12,16 @@ #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; -s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5) +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; @@ -40,45 +32,43 @@ s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5) */ return BIOS_STATUS_UNIMPLEMENTED; - /* - * If EFI_OLD_MEMMAP is set, we need to fall back to using our old EFI - * callback method, which uses efi_call() directly, with the kernel page tables: - */ - if (unlikely(test_bit(EFI_OLD_MEMMAP, &efi.flags))) - ret = efi_call((void *)__va(tab->function), (u64)which, a1, a2, a3, a4, a5); - else - ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5); + ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5); return ret; } -EXPORT_SYMBOL_GPL(uv_bios_call); -s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, - u64 a4, u64 a5) +static s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, + u64 a5) { - unsigned long bios_flags; s64 ret; - local_irq_save(bios_flags); - ret = uv_bios_call(which, a1, a2, a3, a4, a5); - local_irq_restore(bios_flags); + 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; } -s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, - u64 a4, u64 a5) +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; - preempt_disable(); - ret = uv_bios_call(which, a1, a2, a3, a4, a5); - preempt_enable(); + 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; @@ -86,10 +76,7 @@ EXPORT_SYMBOL_GPL(sn_coherency_id); long sn_region_size; EXPORT_SYMBOL_GPL(sn_region_size); long system_serial_number; -EXPORT_SYMBOL_GPL(system_serial_number); int uv_type; -EXPORT_SYMBOL_GPL(uv_type); - s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher, long *region, long *ssn) @@ -116,7 +103,6 @@ s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher, *ssn = v1; return ret; } -EXPORT_SYMBOL_GPL(uv_bios_get_sn_info); int uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size, @@ -167,7 +153,6 @@ 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); } -EXPORT_SYMBOL_GPL(uv_bios_freq_base); /* * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target @@ -186,23 +171,86 @@ 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); } -EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target); -#ifdef CONFIG_EFI -void uv_bios_init(void) +extern s64 uv_bios_get_master_nasid(u64 size, u64 *master_nasid) { - uv_systab = NULL; - if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || - !efi.uv_systab || efi_runtime_disabled()) { - pr_crit("UV: UVsystab: missing\n"); - return; + 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(efi.uv_systab, sizeof(struct uv_systab)); + 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; + return -EINVAL; } /* Starting with UV4 the UV systab size is variable */ @@ -210,12 +258,12 @@ void uv_bios_init(void) int size = uv_systab->size; iounmap(uv_systab); - uv_systab = ioremap(efi.uv_systab, size); + uv_systab = ioremap(uv_systab_phys_addr, size); if (!uv_systab) { pr_err("UV: UVsystab: ioremap(%d) failed!\n", size); - return; + return -EFAULT; } } pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision); + return 0; } -#endif |