spi: s3c64xx: Let spi core handle validating transfer length
[cascardo/linux.git] / arch / x86 / mm / srat.c
1 /*
2  * ACPI 3.0 based NUMA setup
3  * Copyright 2004 Andi Kleen, SuSE Labs.
4  *
5  * Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
6  *
7  * Called from acpi_numa_init while reading the SRAT and SLIT tables.
8  * Assumes all memory regions belonging to a single proximity domain
9  * are in one chunk. Holes between them will be included in the node.
10  */
11
12 #include <linux/kernel.h>
13 #include <linux/acpi.h>
14 #include <linux/mmzone.h>
15 #include <linux/bitmap.h>
16 #include <linux/module.h>
17 #include <linux/topology.h>
18 #include <linux/bootmem.h>
19 #include <linux/memblock.h>
20 #include <linux/mm.h>
21 #include <asm/proto.h>
22 #include <asm/numa.h>
23 #include <asm/e820.h>
24 #include <asm/apic.h>
25 #include <asm/uv/uv.h>
26
27 int acpi_numa __initdata;
28
29 static __init int setup_node(int pxm)
30 {
31         return acpi_map_pxm_to_node(pxm);
32 }
33
34 static __init void bad_srat(void)
35 {
36         printk(KERN_ERR "SRAT: SRAT not used.\n");
37         acpi_numa = -1;
38 }
39
40 static __init inline int srat_disabled(void)
41 {
42         return acpi_numa < 0;
43 }
44
45 /* Callback for SLIT parsing */
46 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
47 {
48         int i, j;
49
50         for (i = 0; i < slit->locality_count; i++)
51                 for (j = 0; j < slit->locality_count; j++)
52                         numa_set_distance(pxm_to_node(i), pxm_to_node(j),
53                                 slit->entry[slit->locality_count * i + j]);
54 }
55
56 /* Callback for Proximity Domain -> x2APIC mapping */
57 void __init
58 acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
59 {
60         int pxm, node;
61         int apic_id;
62
63         if (srat_disabled())
64                 return;
65         if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) {
66                 bad_srat();
67                 return;
68         }
69         if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
70                 return;
71         pxm = pa->proximity_domain;
72         apic_id = pa->apic_id;
73         if (!apic->apic_id_valid(apic_id)) {
74                 printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
75                          pxm, apic_id);
76                 return;
77         }
78         node = setup_node(pxm);
79         if (node < 0) {
80                 printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
81                 bad_srat();
82                 return;
83         }
84
85         if (apic_id >= MAX_LOCAL_APIC) {
86                 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
87                 return;
88         }
89         set_apicid_to_node(apic_id, node);
90         node_set(node, numa_nodes_parsed);
91         acpi_numa = 1;
92         printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
93                pxm, apic_id, node);
94 }
95
96 /* Callback for Proximity Domain -> LAPIC mapping */
97 void __init
98 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
99 {
100         int pxm, node;
101         int apic_id;
102
103         if (srat_disabled())
104                 return;
105         if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
106                 bad_srat();
107                 return;
108         }
109         if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
110                 return;
111         pxm = pa->proximity_domain_lo;
112         if (acpi_srat_revision >= 2)
113                 pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8;
114         node = setup_node(pxm);
115         if (node < 0) {
116                 printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
117                 bad_srat();
118                 return;
119         }
120
121         if (get_uv_system_type() >= UV_X2APIC)
122                 apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
123         else
124                 apic_id = pa->apic_id;
125
126         if (apic_id >= MAX_LOCAL_APIC) {
127                 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
128                 return;
129         }
130
131         set_apicid_to_node(apic_id, node);
132         node_set(node, numa_nodes_parsed);
133         acpi_numa = 1;
134         printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
135                pxm, apic_id, node);
136 }
137
138 #ifdef CONFIG_MEMORY_HOTPLUG
139 static inline int save_add_info(void) {return 1;}
140 #else
141 static inline int save_add_info(void) {return 0;}
142 #endif
143
144 /* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
145 int __init
146 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
147 {
148         u64 start, end;
149         u32 hotpluggable;
150         int node, pxm;
151
152         if (srat_disabled())
153                 goto out_err;
154         if (ma->header.length != sizeof(struct acpi_srat_mem_affinity))
155                 goto out_err_bad_srat;
156         if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
157                 goto out_err;
158         hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE;
159         if (hotpluggable && !save_add_info())
160                 goto out_err;
161
162         start = ma->base_address;
163         end = start + ma->length;
164         pxm = ma->proximity_domain;
165         if (acpi_srat_revision <= 1)
166                 pxm &= 0xff;
167
168         node = setup_node(pxm);
169         if (node < 0) {
170                 printk(KERN_ERR "SRAT: Too many proximity domains.\n");
171                 goto out_err_bad_srat;
172         }
173
174         if (numa_add_memblk(node, start, end) < 0)
175                 goto out_err_bad_srat;
176
177         node_set(node, numa_nodes_parsed);
178
179         pr_info("SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]%s\n",
180                 node, pxm,
181                 (unsigned long long) start, (unsigned long long) end - 1,
182                 hotpluggable ? " hotplug" : "");
183
184         /* Mark hotplug range in memblock. */
185         if (hotpluggable && memblock_mark_hotplug(start, ma->length))
186                 pr_warn("SRAT: Failed to mark hotplug range [mem %#010Lx-%#010Lx] in memblock\n",
187                         (unsigned long long)start, (unsigned long long)end - 1);
188
189         return 0;
190 out_err_bad_srat:
191         bad_srat();
192 out_err:
193         return -1;
194 }
195
196 void __init acpi_numa_arch_fixup(void) {}
197
198 int __init x86_acpi_numa_init(void)
199 {
200         int ret;
201
202         ret = acpi_numa_init();
203         if (ret < 0)
204                 return ret;
205         return srat_disabled() ? -EINVAL : 0;
206 }