1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
7 */
8
9/*
10 * Cross Partition (XP) uv-based functions.
11 *
12 *      Architecture specific implementation of common functions.
13 *
14 */
15
16#include <linux/device.h>
17#include <asm/uv/uv_hub.h>
18#if defined CONFIG_X86_64
19#include <asm/uv/bios.h>
20#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
21#include <asm/sn/sn_sal.h>
22#endif
23#include "../sgi-gru/grukservices.h"
24#include "xp.h"
25
26/*
27 * Convert a virtual memory address to a physical memory address.
28 */
29static unsigned long
30xp_pa_uv(void *addr)
31{
32	return uv_gpa(addr);
33}
34
35/*
36 * Convert a global physical to socket physical address.
37 */
38static unsigned long
39xp_socket_pa_uv(unsigned long gpa)
40{
41	return uv_gpa_to_soc_phys_ram(gpa);
42}
43
44static enum xp_retval
45xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa,
46		   size_t len)
47{
48	int ret;
49	unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa));
50
51	BUG_ON(!uv_gpa_in_mmr_space(src_gpa));
52	BUG_ON(len != 8);
53
54	ret = gru_read_gpa(dst_va, src_gpa);
55	if (ret == 0)
56		return xpSuccess;
57
58	dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
59		"len=%ld\n", dst_gpa, src_gpa, len);
60	return xpGruCopyError;
61}
62
63
64static enum xp_retval
65xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
66		    size_t len)
67{
68	int ret;
69
70	if (uv_gpa_in_mmr_space(src_gpa))
71		return xp_remote_mmr_read(dst_gpa, src_gpa, len);
72
73	ret = gru_copy_gpa(dst_gpa, src_gpa, len);
74	if (ret == 0)
75		return xpSuccess;
76
77	dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
78		"len=%ld\n", dst_gpa, src_gpa, len);
79	return xpGruCopyError;
80}
81
82static int
83xp_cpu_to_nasid_uv(int cpuid)
84{
85	/* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
86	return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
87}
88
89static enum xp_retval
90xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
91{
92	int ret;
93
94#if defined CONFIG_X86_64
95	ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW);
96	if (ret != BIOS_STATUS_SUCCESS) {
97		dev_err(xp, "uv_bios_change_memprotect(,, "
98			"UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret);
99		return xpBiosError;
100	}
101
102#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
103	u64 nasid_array;
104
105	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1,
106				   &nasid_array);
107	if (ret != 0) {
108		dev_err(xp, "sn_change_memprotect(,, "
109			"SN_MEMPROT_ACCESS_CLASS_1,) failed ret=%d\n", ret);
110		return xpSalError;
111	}
112#else
113	#error not a supported configuration
114#endif
115	return xpSuccess;
116}
117
118static enum xp_retval
119xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
120{
121	int ret;
122
123#if defined CONFIG_X86_64
124	ret = uv_bios_change_memprotect(phys_addr, size,
125					UV_MEMPROT_RESTRICT_ACCESS);
126	if (ret != BIOS_STATUS_SUCCESS) {
127		dev_err(xp, "uv_bios_change_memprotect(,, "
128			"UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret);
129		return xpBiosError;
130	}
131
132#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
133	u64 nasid_array;
134
135	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0,
136				   &nasid_array);
137	if (ret != 0) {
138		dev_err(xp, "sn_change_memprotect(,, "
139			"SN_MEMPROT_ACCESS_CLASS_0,) failed ret=%d\n", ret);
140		return xpSalError;
141	}
142#else
143	#error not a supported configuration
144#endif
145	return xpSuccess;
146}
147
148enum xp_retval
149xp_init_uv(void)
150{
151	BUG_ON(!is_uv());
152
153	xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
154	xp_partition_id = sn_partition_id;
155	xp_region_size = sn_region_size;
156
157	xp_pa = xp_pa_uv;
158	xp_socket_pa = xp_socket_pa_uv;
159	xp_remote_memcpy = xp_remote_memcpy_uv;
160	xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
161	xp_expand_memprotect = xp_expand_memprotect_uv;
162	xp_restrict_memprotect = xp_restrict_memprotect_uv;
163
164	return xpSuccess;
165}
166
167void
168xp_exit_uv(void)
169{
170	BUG_ON(!is_uv());
171}
172