16a93ed7baf185199180658360ca857c059eea70
[linux-2.6.git] / arch / x86 / kernel / genx2apic_uv_x.c
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  * SGI UV APIC functions (note: not an Intel compatible APIC)
7  *
8  * Copyright (C) 2007-2008 Silicon Graphics, Inc. All rights reserved.
9  */
10
11 #include <linux/kernel.h>
12 #include <linux/threads.h>
13 #include <linux/cpumask.h>
14 #include <linux/string.h>
15 #include <linux/ctype.h>
16 #include <linux/init.h>
17 #include <linux/sched.h>
18 #include <linux/bootmem.h>
19 #include <linux/module.h>
20 #include <linux/hardirq.h>
21 #include <asm/smp.h>
22 #include <asm/ipi.h>
23 #include <asm/genapic.h>
24 #include <asm/pgtable.h>
25 #include <asm/uv/uv_mmrs.h>
26 #include <asm/uv/uv_hub.h>
27 #include <asm/uv/bios.h>
28
29 DEFINE_PER_CPU(int, x2apic_extra_bits);
30
31 static enum uv_system_type uv_system_type;
32
33 static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
34 {
35         if (!strcmp(oem_id, "SGI")) {
36                 if (!strcmp(oem_table_id, "UVL"))
37                         uv_system_type = UV_LEGACY_APIC;
38                 else if (!strcmp(oem_table_id, "UVX"))
39                         uv_system_type = UV_X2APIC;
40                 else if (!strcmp(oem_table_id, "UVH")) {
41                         uv_system_type = UV_NON_UNIQUE_APIC;
42                         return 1;
43                 }
44         }
45         return 0;
46 }
47
48 enum uv_system_type get_uv_system_type(void)
49 {
50         return uv_system_type;
51 }
52
53 int is_uv_system(void)
54 {
55         return uv_system_type != UV_NONE;
56 }
57 EXPORT_SYMBOL_GPL(is_uv_system);
58
59 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
60 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
61
62 struct uv_blade_info *uv_blade_info;
63 EXPORT_SYMBOL_GPL(uv_blade_info);
64
65 short *uv_node_to_blade;
66 EXPORT_SYMBOL_GPL(uv_node_to_blade);
67
68 short *uv_cpu_to_blade;
69 EXPORT_SYMBOL_GPL(uv_cpu_to_blade);
70
71 short uv_possible_blades;
72 EXPORT_SYMBOL_GPL(uv_possible_blades);
73
74 unsigned long sn_rtc_cycles_per_second;
75 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
76
77 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */
78
79 static cpumask_t uv_target_cpus(void)
80 {
81         return cpumask_of_cpu(0);
82 }
83
84 static cpumask_t uv_vector_allocation_domain(int cpu)
85 {
86         cpumask_t domain = CPU_MASK_NONE;
87         cpu_set(cpu, domain);
88         return domain;
89 }
90
91 int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip)
92 {
93         unsigned long val;
94         int pnode;
95
96         pnode = uv_apicid_to_pnode(phys_apicid);
97         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
98             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
99             (((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
100             APIC_DM_INIT;
101         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
102         mdelay(10);
103
104         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
105             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
106             (((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
107             APIC_DM_STARTUP;
108         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
109         return 0;
110 }
111
112 static void uv_send_IPI_one(int cpu, int vector)
113 {
114         unsigned long val, apicid, lapicid;
115         int pnode;
116
117         apicid = per_cpu(x86_cpu_to_apicid, cpu); /* ZZZ - cache node-local ? */
118         lapicid = apicid & 0x3f;                /* ZZZ macro needed */
119         pnode = uv_apicid_to_pnode(apicid);
120         val =
121             (1UL << UVH_IPI_INT_SEND_SHFT) | (lapicid <<
122                                               UVH_IPI_INT_APIC_ID_SHFT) |
123             (vector << UVH_IPI_INT_VECTOR_SHFT);
124         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
125 }
126
127 static void uv_send_IPI_mask(cpumask_t mask, int vector)
128 {
129         unsigned int cpu;
130
131         for_each_possible_cpu(cpu)
132                 if (cpu_isset(cpu, mask))
133                         uv_send_IPI_one(cpu, vector);
134 }
135
136 static void uv_send_IPI_allbutself(int vector)
137 {
138         cpumask_t mask = cpu_online_map;
139
140         cpu_clear(smp_processor_id(), mask);
141
142         if (!cpus_empty(mask))
143                 uv_send_IPI_mask(mask, vector);
144 }
145
146 static void uv_send_IPI_all(int vector)
147 {
148         uv_send_IPI_mask(cpu_online_map, vector);
149 }
150
151 static int uv_apic_id_registered(void)
152 {
153         return 1;
154 }
155
156 static void uv_init_apic_ldr(void)
157 {
158 }
159
160 static unsigned int uv_cpu_mask_to_apicid(cpumask_t cpumask)
161 {
162         int cpu;
163
164         /*
165          * We're using fixed IRQ delivery, can only return one phys APIC ID.
166          * May as well be the first.
167          */
168         cpu = first_cpu(cpumask);
169         if ((unsigned)cpu < nr_cpu_ids)
170                 return per_cpu(x86_cpu_to_apicid, cpu);
171         else
172                 return BAD_APICID;
173 }
174
175 static unsigned int get_apic_id(unsigned long x)
176 {
177         unsigned int id;
178
179         WARN_ON(preemptible() && num_online_cpus() > 1);
180         id = x | __get_cpu_var(x2apic_extra_bits);
181
182         return id;
183 }
184
185 static unsigned long set_apic_id(unsigned int id)
186 {
187         unsigned long x;
188
189         /* maskout x2apic_extra_bits ? */
190         x = id;
191         return x;
192 }
193
194 static unsigned int uv_read_apic_id(void)
195 {
196
197         return get_apic_id(apic_read(APIC_ID));
198 }
199
200 static unsigned int phys_pkg_id(int index_msb)
201 {
202         return uv_read_apic_id() >> index_msb;
203 }
204
205 #ifdef ZZZ              /* Needs x2apic patch */
206 static void uv_send_IPI_self(int vector)
207 {
208         apic_write(APIC_SELF_IPI, vector);
209 }
210 #endif
211
212 struct genapic apic_x2apic_uv_x = {
213         .name = "UV large system",
214         .acpi_madt_oem_check = uv_acpi_madt_oem_check,
215         .int_delivery_mode = dest_Fixed,
216         .int_dest_mode = (APIC_DEST_PHYSICAL != 0),
217         .target_cpus = uv_target_cpus,
218         .vector_allocation_domain = uv_vector_allocation_domain,/* Fixme ZZZ */
219         .apic_id_registered = uv_apic_id_registered,
220         .init_apic_ldr = uv_init_apic_ldr,
221         .send_IPI_all = uv_send_IPI_all,
222         .send_IPI_allbutself = uv_send_IPI_allbutself,
223         .send_IPI_mask = uv_send_IPI_mask,
224         /* ZZZ.send_IPI_self = uv_send_IPI_self, */
225         .cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
226         .phys_pkg_id = phys_pkg_id,     /* Fixme ZZZ */
227         .get_apic_id = get_apic_id,
228         .set_apic_id = set_apic_id,
229         .apic_id_mask = (0xFFFFFFFFu),
230 };
231
232 static __cpuinit void set_x2apic_extra_bits(int pnode)
233 {
234         __get_cpu_var(x2apic_extra_bits) = (pnode << 6);
235 }
236
237 /*
238  * Called on boot cpu.
239  */
240 static __init int boot_pnode_to_blade(int pnode)
241 {
242         int blade;
243
244         for (blade = 0; blade < uv_num_possible_blades(); blade++)
245                 if (pnode == uv_blade_info[blade].pnode)
246                         return blade;
247         BUG();
248 }
249
250 struct redir_addr {
251         unsigned long redirect;
252         unsigned long alias;
253 };
254
255 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
256
257 static __initdata struct redir_addr redir_addrs[] = {
258         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
259         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
260         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
261 };
262
263 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
264 {
265         union uvh_si_alias0_overlay_config_u alias;
266         union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
267         int i;
268
269         for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
270                 alias.v = uv_read_local_mmr(redir_addrs[i].alias);
271                 if (alias.s.base == 0) {
272                         *size = (1UL << alias.s.m_alias);
273                         redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
274                         *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
275                         return;
276                 }
277         }
278         BUG();
279 }
280
281 static __init void map_low_mmrs(void)
282 {
283         init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
284         init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
285 }
286
287 enum map_type {map_wb, map_uc};
288
289 static void map_high(char *id, unsigned long base, int shift, enum map_type map_type)
290 {
291         unsigned long bytes, paddr;
292
293         paddr = base << shift;
294         bytes = (1UL << shift);
295         printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
296                                                 paddr + bytes);
297         if (map_type == map_uc)
298                 init_extra_mapping_uc(paddr, bytes);
299         else
300                 init_extra_mapping_wb(paddr, bytes);
301
302 }
303 static __init void map_gru_high(int max_pnode)
304 {
305         union uvh_rh_gam_gru_overlay_config_mmr_u gru;
306         int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
307
308         gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
309         if (gru.s.enable)
310                 map_high("GRU", gru.s.base, shift, map_wb);
311 }
312
313 static __init void map_config_high(int max_pnode)
314 {
315         union uvh_rh_gam_cfg_overlay_config_mmr_u cfg;
316         int shift = UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR_BASE_SHFT;
317
318         cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
319         if (cfg.s.enable)
320                 map_high("CONFIG", cfg.s.base, shift, map_uc);
321 }
322
323 static __init void map_mmr_high(int max_pnode)
324 {
325         union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
326         int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
327
328         mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
329         if (mmr.s.enable)
330                 map_high("MMR", mmr.s.base, shift, map_uc);
331 }
332
333 static __init void map_mmioh_high(int max_pnode)
334 {
335         union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
336         int shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
337
338         mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
339         if (mmioh.s.enable)
340                 map_high("MMIOH", mmioh.s.base, shift, map_uc);
341 }
342
343 static __init void uv_rtc_init(void)
344 {
345         long status, ticks_per_sec, drift;
346
347         status =
348             x86_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec,
349                                         &drift);
350         if (status != 0 || ticks_per_sec < 100000) {
351                 printk(KERN_WARNING
352                         "unable to determine platform RTC clock frequency, "
353                         "guessing.\n");
354                 /* BIOS gives wrong value for clock freq. so guess */
355                 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
356         } else
357                 sn_rtc_cycles_per_second = ticks_per_sec;
358 }
359
360 static __init void uv_system_init(void)
361 {
362         union uvh_si_addr_map_config_u m_n_config;
363         union uvh_node_id_u node_id;
364         unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
365         int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
366         int max_pnode = 0;
367         unsigned long mmr_base, present;
368
369         map_low_mmrs();
370
371         m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
372         m_val = m_n_config.s.m_skt;
373         n_val = m_n_config.s.n_skt;
374         mmr_base =
375             uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
376             ~UV_MMR_ENABLE;
377         printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
378
379         for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
380                 uv_possible_blades +=
381                   hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
382         printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());
383
384         bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
385         uv_blade_info = alloc_bootmem_pages(bytes);
386
387         get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
388
389         bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
390         uv_node_to_blade = alloc_bootmem_pages(bytes);
391         memset(uv_node_to_blade, 255, bytes);
392
393         bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
394         uv_cpu_to_blade = alloc_bootmem_pages(bytes);
395         memset(uv_cpu_to_blade, 255, bytes);
396
397         blade = 0;
398         for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
399                 present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
400                 for (j = 0; j < 64; j++) {
401                         if (!test_bit(j, &present))
402                                 continue;
403                         uv_blade_info[blade].pnode = (i * 64 + j);
404                         uv_blade_info[blade].nr_possible_cpus = 0;
405                         uv_blade_info[blade].nr_online_cpus = 0;
406                         blade++;
407                 }
408         }
409
410         node_id.v = uv_read_local_mmr(UVH_NODE_ID);
411         gnode_upper = (((unsigned long)node_id.s.node_id) &
412                        ~((1 << n_val) - 1)) << m_val;
413
414         uv_rtc_init();
415
416         for_each_present_cpu(cpu) {
417                 nid = cpu_to_node(cpu);
418                 pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu));
419                 blade = boot_pnode_to_blade(pnode);
420                 lcpu = uv_blade_info[blade].nr_possible_cpus;
421                 uv_blade_info[blade].nr_possible_cpus++;
422
423                 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
424                 uv_cpu_hub_info(cpu)->lowmem_remap_top =
425                                         lowmem_redir_base + lowmem_redir_size;
426                 uv_cpu_hub_info(cpu)->m_val = m_val;
427                 uv_cpu_hub_info(cpu)->n_val = m_val;
428                 uv_cpu_hub_info(cpu)->numa_blade_id = blade;
429                 uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
430                 uv_cpu_hub_info(cpu)->pnode = pnode;
431                 uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) - 1;
432                 uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
433                 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
434                 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
435                 uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
436                 uv_node_to_blade[nid] = blade;
437                 uv_cpu_to_blade[cpu] = blade;
438                 max_pnode = max(pnode, max_pnode);
439
440                 printk(KERN_DEBUG "UV: cpu %d, apicid 0x%x, pnode %d, nid %d, "
441                         "lcpu %d, blade %d\n",
442                         cpu, per_cpu(x86_cpu_to_apicid, cpu), pnode, nid,
443                         lcpu, blade);
444         }
445
446         map_gru_high(max_pnode);
447         map_mmr_high(max_pnode);
448         map_config_high(max_pnode);
449         map_mmioh_high(max_pnode);
450 }
451
452 /*
453  * Called on each cpu to initialize the per_cpu UV data area.
454  *      ZZZ hotplug not supported yet
455  */
456 void __cpuinit uv_cpu_init(void)
457 {
458         if (!uv_node_to_blade)
459                 uv_system_init();
460
461         uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
462
463         if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
464                 set_x2apic_extra_bits(uv_hub_info->pnode);
465 }
466
467