diff options
Diffstat (limited to 'arch/x86/platform/uv/bios_uv.c')
| -rw-r--r-- | arch/x86/platform/uv/bios_uv.c | 191 |
1 files changed, 122 insertions, 69 deletions
diff --git a/arch/x86/platform/uv/bios_uv.c b/arch/x86/platform/uv/bios_uv.c index 766612137a62..bf31af3d32d6 100644 --- a/arch/x86/platform/uv/bios_uv.c +++ b/arch/x86/platform/uv/bios_uv.c @@ -1,76 +1,74 @@ +// 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> #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> -static struct uv_systab uv_systab; +unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR; -s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5) +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; + struct uv_systab *tab = uv_systab; s64 ret; - if (!tab->function) + if (!tab || !tab->function) /* * BIOS does not support UV systab */ return BIOS_STATUS_UNIMPLEMENTED; - ret = efi_call6((void *)__va(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; @@ -78,10 +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) @@ -108,7 +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, @@ -149,11 +143,8 @@ EXPORT_SYMBOL_GPL(uv_bios_change_memprotect); s64 uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len) { - s64 ret; - - ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie, - (u64)addr, buf, (u64)len, 0); - return ret; + 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); @@ -162,7 +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 @@ -181,36 +171,99 @@ 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); +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); -#ifdef CONFIG_EFI -void uv_bios_init(void) +extern s64 uv_bios_get_heapsize(u64 nasid, u64 size, u64 *heap_size) { - struct uv_systab *tab; + 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); - if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || - (efi.uv_systab == (unsigned long)NULL)) { - printk(KERN_CRIT "No EFI UV System Table.\n"); - uv_systab.function = (unsigned long)NULL; - return; - } +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); - tab = (struct uv_systab *)ioremap(efi.uv_systab, - sizeof(struct uv_systab)); - if (strncmp(tab->signature, "UVST", 4) != 0) - printk(KERN_ERR "bad signature in UV system table!"); +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); - /* - * Copy table to permanent spot for later use. - */ - memcpy(&uv_systab, tab, sizeof(struct uv_systab)); - iounmap(tab); +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); - printk(KERN_INFO "EFI UV System Table Revision %d\n", - uv_systab.revision); +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; } -#else /* !CONFIG_EFI */ -void uv_bios_init(void) { } -#endif +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; +} |