[linux-2.6-block.git] / arch / x86 / platform / uv / bios_uv.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;
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
7019cc2d RA	2	/*
	3	* BIOS run time interface routines.
	4	*
7a6d94f0	5	* (C) Copyright 2020 Hewlett Packard Enterprise Development LP
1e61f5a9 MT	6	* Copyright (C) 2007-2017 Silicon Graphics, Inc. All rights reserved.
1e61f5a9 MT	7	* Copyright (c) Russ Anderson <rja@sgi.com>
7019cc2d RA	8	*/
7019cc2d RA	9
7f594232	10	#include <linux/efi.h>
69c60c88	11	#include <linux/export.h>
ef93bf80	12	#include <linux/slab.h>
7f594232 RA	13	#include <asm/efi.h>
7f594232 RA	14	#include <linux/io.h>
ca15ca40	15	#include <asm/pgalloc.h>
7019cc2d	16	#include <asm/uv/bios.h>
922402f1	17	#include <asm/uv/uv_hub.h>
7019cc2d	18
ec7e1605 AB	19	unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
ec7e1605 AB	20
ef93bf80	21	struct uv_systab *uv_systab;
7f594232	22
f331e766 HB	23	static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
f331e766 HB	24	u64 a4, u64 a5)
7019cc2d	25	{
ef93bf80	26	struct uv_systab *tab = uv_systab;
b76365a1	27	s64 ret;
7f594232	28
ef93bf80	29	if (!tab \|\| !tab->function)
7f594232 RA	30	/*
	31	* BIOS does not support UV systab
	32	*/
	33	return BIOS_STATUS_UNIMPLEMENTED;
	34
6aa3baab	35	ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
caef78b6	36
b76365a1	37	return ret;
7019cc2d	38	}
f331e766	39
30ad8db3 CH	40	static s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4,
30ad8db3 CH	41	u64 a5)
f331e766 HB	42	{
	43	s64 ret;
	44
	45	if (down_interruptible(&__efi_uv_runtime_lock))
	46	return BIOS_STATUS_ABORT;
	47
	48	ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
	49	up(&__efi_uv_runtime_lock);
	50
	51	return ret;
	52	}
7019cc2d	53
30ad8db3 CH	54	static s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
30ad8db3 CH	55	u64 a4, u64 a5)
7019cc2d	56	{
7f594232 RA	57	unsigned long bios_flags;
	58	s64 ret;
	59
f331e766 HB	60	if (down_interruptible(&__efi_uv_runtime_lock))
	61	return BIOS_STATUS_ABORT;
	62
7f594232	63	local_irq_save(bios_flags);
f331e766	64	ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
7f594232 RA	65	local_irq_restore(bios_flags);
7f594232 RA	66
f331e766 HB	67	up(&__efi_uv_runtime_lock);
f331e766 HB	68
7f594232 RA	69	return ret;
	70	}
	71
922402f1 RA	72	long sn_partition_id;
922402f1 RA	73	EXPORT_SYMBOL_GPL(sn_partition_id);
b0f20989	74	long sn_coherency_id;
9a3c425c	75	EXPORT_SYMBOL_GPL(sn_coherency_id);
b0f20989 RA	76	long sn_region_size;
b0f20989 RA	77	EXPORT_SYMBOL_GPL(sn_region_size);
b76365a1	78	long system_serial_number;
922402f1	79	int uv_type;
922402f1 RA	80
922402f1 RA	81	s64 uv_bios_get_sn_info(int fc, int uvtype, long partid, long *coher,
b76365a1	82	long region, long ssn)
922402f1 RA	83	{
	84	s64 ret;
	85	u64 v0, v1;
	86	union partition_info_u part;
	87
	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)
	91	return ret;
	92
	93	part.val = v0;
	94	if (uvtype)
	95	*uvtype = part.hub_version;
	96	if (partid)
	97	*partid = part.partition_id;
	98	if (coher)
	99	*coher = part.coherence_id;
	100	if (region)
	101	*region = part.region_size;
b76365a1 RA	102	if (ssn)
b76365a1 RA	103	*ssn = v1;
922402f1 RA	104	return ret;
	105	}
	106
64ccf2f9	107	int
c2c9f115	108	uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
64ccf2f9 RA	109	unsigned long *intr_mmr_offset)
64ccf2f9 RA	110	{
64ccf2f9 RA	111	u64 watchlist;
	112	s64 ret;
	113
64ccf2f9 RA	114	/*
	115	* bios returns watchlist number or negative error number.
	116	*/
	117	ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
c2c9f115	118	mq_size, (u64)intr_mmr_offset,
64ccf2f9 RA	119	(u64)&watchlist, 0);
	120	if (ret < BIOS_STATUS_SUCCESS)
	121	return ret;
	122
	123	return watchlist;
	124	}
	125	EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
	126
	127	int
	128	uv_bios_mq_watchlist_free(int blade, int watchlist_num)
	129	{
	130	return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
	131	blade, watchlist_num, 0, 0, 0);
	132	}
	133	EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
922402f1	134
e8929c8a RA	135	s64
	136	uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
	137	{
	138	return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
	139	perms, 0, 0);
	140	}
	141	EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
	142
23c35700 RA	143	s64
	144	uv_bios_reserved_page_pa(u64 buf, u64 cookie, u64 addr, u64 *len)
	145	{
f148b41e MY	146	return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
f148b41e MY	147	(u64)addr, buf, (u64)len, 0);
23c35700 RA	148	}
	149	EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
	150
922402f1	151	s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
7f594232 RA	152	{
7f594232 RA	153	return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
922402f1	154	(u64)ticks_per_second, 0, 0, 0);
7019cc2d	155	}
7f594232	156
841582ea MT	157	/*
	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
	162	*
	163	* Returns:
	164	* 0: Success
	165	* -EINVAL: Invalid domain or bus number
	166	* -ENOSYS: Capability not available
	167	* -EBUSY: Legacy VGA I/O cannot be retargeted at this time
	168	*/
	169	int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
	170	{
	171	return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
	172	(u64)decode, (u64)domain, (u64)bus, 0, 0);
	173	}
841582ea	174
9a3c425c JE	175	extern s64 uv_bios_get_master_nasid(u64 size, u64 *master_nasid)
	176	{
	177	return uv_bios_call(UV_BIOS_EXTRA, 0, UV_BIOS_EXTRA_MASTER_NASID, 0,
	178	size, (u64)master_nasid);
	179	}
	180	EXPORT_SYMBOL_GPL(uv_bios_get_master_nasid);
	181
	182	extern s64 uv_bios_get_heapsize(u64 nasid, u64 size, u64 *heap_size)
	183	{
	184	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_GET_HEAPSIZE,
	185	0, size, (u64)heap_size);
	186	}
	187	EXPORT_SYMBOL_GPL(uv_bios_get_heapsize);
	188
	189	extern s64 uv_bios_install_heap(u64 nasid, u64 heap_size, u64 *bios_heap)
	190	{
	191	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_INSTALL_HEAP,
	192	0, heap_size, (u64)bios_heap);
	193	}
	194	EXPORT_SYMBOL_GPL(uv_bios_install_heap);
	195
	196	extern s64 uv_bios_obj_count(u64 nasid, u64 size, u64 *objcnt)
	197	{
	198	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_OBJECT_COUNT,
	199	0, size, (u64)objcnt);
	200	}
	201	EXPORT_SYMBOL_GPL(uv_bios_obj_count);
	202
	203	extern s64 uv_bios_enum_objs(u64 nasid, u64 size, u64 *objbuf)
	204	{
	205	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_OBJECTS,
	206	0, size, (u64)objbuf);
	207	}
	208	EXPORT_SYMBOL_GPL(uv_bios_enum_objs);
	209
	210	extern s64 uv_bios_enum_ports(u64 nasid, u64 obj_id, u64 size, u64 *portbuf)
	211	{
	212	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_PORTS,
	213	obj_id, size, (u64)portbuf);
	214	}
	215	EXPORT_SYMBOL_GPL(uv_bios_enum_ports);
	216
	217	extern s64 uv_bios_get_geoinfo(u64 nasid, u64 size, u64 *buf)
	218	{
	219	return uv_bios_call(UV_BIOS_GET_GEOINFO, nasid, (u64)buf, size, 0, 0);
	220	}
	221	EXPORT_SYMBOL_GPL(uv_bios_get_geoinfo);
	222
	223	extern s64 uv_bios_get_pci_topology(u64 size, u64 *buf)
	224	{
	225	return uv_bios_call(UV_BIOS_GET_PCI_TOPOLOGY, (u64)buf, size, 0, 0, 0);
	226	}
	227	EXPORT_SYMBOL_GPL(uv_bios_get_pci_topology);
	228
1e61f5a9	229	unsigned long get_uv_systab_phys(bool msg)
7f594232	230	{
ec7e1605 AB	231	if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) \|\|
ec7e1605 AB	232	!uv_systab_phys \|\| efi_runtime_disabled()) {
1e61f5a9 MT	233	if (msg)
	234	pr_crit("UV: UVsystab: missing\n");
	235	return 0;
7f594232	236	}
1e61f5a9 MT	237	return uv_systab_phys;
	238	}
	239
	240	int uv_bios_init(void)
	241	{
	242	unsigned long uv_systab_phys_addr;
	243
	244	uv_systab = NULL;
	245	uv_systab_phys_addr = get_uv_systab_phys(1);
	246	if (!uv_systab_phys_addr)
	247	return -EEXIST;
7f594232	248
1e61f5a9	249	uv_systab = ioremap(uv_systab_phys_addr, sizeof(struct uv_systab));
ef93bf80 MT	250	if (!uv_systab \|\| strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
	251	pr_err("UV: UVsystab: bad signature!\n");
	252	iounmap(uv_systab);
9743cb68	253	return -EINVAL;
ef93bf80	254	}
7f594232	255
e363d24c	256	/* Starting with UV4 the UV systab size is variable */
ef93bf80	257	if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
e363d24c MT	258	int size = uv_systab->size;
e363d24c MT	259
ef93bf80	260	iounmap(uv_systab);
1e61f5a9	261	uv_systab = ioremap(uv_systab_phys_addr, size);
ef93bf80	262	if (!uv_systab) {
e363d24c	263	pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
9743cb68	264	return -EFAULT;
ef93bf80 MT	265	}
	266	}
	267	pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);
9743cb68	268	return 0;
7f594232	269	}