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UBUNTU: Ubuntu-4.13.0-45.50
[mirror_ubuntu-artful-kernel.git] / arch / x86 / kernel / apic / x2apic_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) 2007-2014 Silicon Graphics, Inc. All rights reserved.
9 */
10 #include <linux/cpumask.h>
11 #include <linux/hardirq.h>
12 #include <linux/proc_fs.h>
13 #include <linux/threads.h>
14 #include <linux/kernel.h>
15 #include <linux/export.h>
16 #include <linux/string.h>
17 #include <linux/ctype.h>
18 #include <linux/sched.h>
19 #include <linux/timer.h>
20 #include <linux/slab.h>
21 #include <linux/cpu.h>
22 #include <linux/init.h>
23 #include <linux/io.h>
24 #include <linux/pci.h>
25 #include <linux/kdebug.h>
26 #include <linux/delay.h>
27 #include <linux/crash_dump.h>
28 #include <linux/reboot.h>
29
30 #include <asm/uv/uv_mmrs.h>
31 #include <asm/uv/uv_hub.h>
32 #include <asm/current.h>
33 #include <asm/pgtable.h>
34 #include <asm/uv/bios.h>
35 #include <asm/uv/uv.h>
36 #include <asm/apic.h>
37 #include <asm/e820/api.h>
38 #include <asm/ipi.h>
39 #include <asm/smp.h>
40 #include <asm/x86_init.h>
41 #include <asm/nmi.h>
42
43 DEFINE_PER_CPU(int, x2apic_extra_bits);
44
45 static enum uv_system_type uv_system_type;
46 static bool uv_hubless_system;
47 static u64 gru_start_paddr, gru_end_paddr;
48 static u64 gru_dist_base, gru_first_node_paddr = -1LL, gru_last_node_paddr;
49 static u64 gru_dist_lmask, gru_dist_umask;
50 static union uvh_apicid uvh_apicid;
51
52 /* Information derived from CPUID: */
53 static struct {
54 unsigned int apicid_shift;
55 unsigned int apicid_mask;
56 unsigned int socketid_shift; /* aka pnode_shift for UV1/2/3 */
57 unsigned int pnode_mask;
58 unsigned int gpa_shift;
59 unsigned int gnode_shift;
60 } uv_cpuid;
61
62 int uv_min_hub_revision_id;
63 EXPORT_SYMBOL_GPL(uv_min_hub_revision_id);
64
65 unsigned int uv_apicid_hibits;
66 EXPORT_SYMBOL_GPL(uv_apicid_hibits);
67
68 static struct apic apic_x2apic_uv_x;
69 static struct uv_hub_info_s uv_hub_info_node0;
70
71 /* Set this to use hardware error handler instead of kernel panic: */
72 static int disable_uv_undefined_panic = 1;
73
74 unsigned long uv_undefined(char *str)
75 {
76 if (likely(!disable_uv_undefined_panic))
77 panic("UV: error: undefined MMR: %s\n", str);
78 else
79 pr_crit("UV: error: undefined MMR: %s\n", str);
80
81 /* Cause a machine fault: */
82 return ~0ul;
83 }
84 EXPORT_SYMBOL(uv_undefined);
85
86 static unsigned long __init uv_early_read_mmr(unsigned long addr)
87 {
88 unsigned long val, *mmr;
89
90 mmr = early_ioremap(UV_LOCAL_MMR_BASE | addr, sizeof(*mmr));
91 val = *mmr;
92 early_iounmap(mmr, sizeof(*mmr));
93
94 return val;
95 }
96
97 static inline bool is_GRU_range(u64 start, u64 end)
98 {
99 if (gru_dist_base) {
100 u64 su = start & gru_dist_umask; /* Upper (incl pnode) bits */
101 u64 sl = start & gru_dist_lmask; /* Base offset bits */
102 u64 eu = end & gru_dist_umask;
103 u64 el = end & gru_dist_lmask;
104
105 /* Must reside completely within a single GRU range: */
106 return (sl == gru_dist_base && el == gru_dist_base &&
107 su >= gru_first_node_paddr &&
108 su <= gru_last_node_paddr &&
109 eu == su);
110 } else {
111 return start >= gru_start_paddr && end <= gru_end_paddr;
112 }
113 }
114
115 static bool uv_is_untracked_pat_range(u64 start, u64 end)
116 {
117 return is_ISA_range(start, end) || is_GRU_range(start, end);
118 }
119
120 static int __init early_get_pnodeid(void)
121 {
122 union uvh_node_id_u node_id;
123 union uvh_rh_gam_config_mmr_u m_n_config;
124 int pnode;
125
126 /* Currently, all blades have same revision number */
127 node_id.v = uv_early_read_mmr(UVH_NODE_ID);
128 m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_CONFIG_MMR);
129 uv_min_hub_revision_id = node_id.s.revision;
130
131 switch (node_id.s.part_number) {
132 case UV2_HUB_PART_NUMBER:
133 case UV2_HUB_PART_NUMBER_X:
134 uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1;
135 break;
136 case UV3_HUB_PART_NUMBER:
137 case UV3_HUB_PART_NUMBER_X:
138 uv_min_hub_revision_id += UV3_HUB_REVISION_BASE;
139 break;
140 case UV4_HUB_PART_NUMBER:
141 uv_min_hub_revision_id += UV4_HUB_REVISION_BASE - 1;
142 uv_cpuid.gnode_shift = 2; /* min partition is 4 sockets */
143 break;
144 }
145
146 uv_hub_info->hub_revision = uv_min_hub_revision_id;
147 uv_cpuid.pnode_mask = (1 << m_n_config.s.n_skt) - 1;
148 pnode = (node_id.s.node_id >> 1) & uv_cpuid.pnode_mask;
149 uv_cpuid.gpa_shift = 46; /* Default unless changed */
150
151 pr_info("UV: rev:%d part#:%x nodeid:%04x n_skt:%d pnmsk:%x pn:%x\n",
152 node_id.s.revision, node_id.s.part_number, node_id.s.node_id,
153 m_n_config.s.n_skt, uv_cpuid.pnode_mask, pnode);
154 return pnode;
155 }
156
157 /* [Copied from arch/x86/kernel/cpu/topology.c:detect_extended_topology()] */
158
159 #define SMT_LEVEL 0 /* Leaf 0xb SMT level */
160 #define INVALID_TYPE 0 /* Leaf 0xb sub-leaf types */
161 #define SMT_TYPE 1
162 #define CORE_TYPE 2
163 #define LEAFB_SUBTYPE(ecx) (((ecx) >> 8) & 0xff)
164 #define BITS_SHIFT_NEXT_LEVEL(eax) ((eax) & 0x1f)
165
166 static void set_x2apic_bits(void)
167 {
168 unsigned int eax, ebx, ecx, edx, sub_index;
169 unsigned int sid_shift;
170
171 cpuid(0, &eax, &ebx, &ecx, &edx);
172 if (eax < 0xb) {
173 pr_info("UV: CPU does not have CPUID.11\n");
174 return;
175 }
176
177 cpuid_count(0xb, SMT_LEVEL, &eax, &ebx, &ecx, &edx);
178 if (ebx == 0 || (LEAFB_SUBTYPE(ecx) != SMT_TYPE)) {
179 pr_info("UV: CPUID.11 not implemented\n");
180 return;
181 }
182
183 sid_shift = BITS_SHIFT_NEXT_LEVEL(eax);
184 sub_index = 1;
185 do {
186 cpuid_count(0xb, sub_index, &eax, &ebx, &ecx, &edx);
187 if (LEAFB_SUBTYPE(ecx) == CORE_TYPE) {
188 sid_shift = BITS_SHIFT_NEXT_LEVEL(eax);
189 break;
190 }
191 sub_index++;
192 } while (LEAFB_SUBTYPE(ecx) != INVALID_TYPE);
193
194 uv_cpuid.apicid_shift = 0;
195 uv_cpuid.apicid_mask = (~(-1 << sid_shift));
196 uv_cpuid.socketid_shift = sid_shift;
197 }
198
199 static void __init early_get_apic_socketid_shift(void)
200 {
201 if (is_uv2_hub() || is_uv3_hub())
202 uvh_apicid.v = uv_early_read_mmr(UVH_APICID);
203
204 set_x2apic_bits();
205
206 pr_info("UV: apicid_shift:%d apicid_mask:0x%x\n", uv_cpuid.apicid_shift, uv_cpuid.apicid_mask);
207 pr_info("UV: socketid_shift:%d pnode_mask:0x%x\n", uv_cpuid.socketid_shift, uv_cpuid.pnode_mask);
208 }
209
210 /*
211 * Add an extra bit as dictated by bios to the destination apicid of
212 * interrupts potentially passing through the UV HUB. This prevents
213 * a deadlock between interrupts and IO port operations.
214 */
215 static void __init uv_set_apicid_hibit(void)
216 {
217 union uv1h_lb_target_physical_apic_id_mask_u apicid_mask;
218
219 if (is_uv1_hub()) {
220 apicid_mask.v = uv_early_read_mmr(UV1H_LB_TARGET_PHYSICAL_APIC_ID_MASK);
221 uv_apicid_hibits = apicid_mask.s1.bit_enables & UV_APICID_HIBIT_MASK;
222 }
223 }
224
225 static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
226 {
227 int pnodeid;
228 int uv_apic;
229
230 if (strncmp(oem_id, "SGI", 3) != 0) {
231 if (strncmp(oem_id, "NSGI", 4) == 0) {
232 uv_hubless_system = true;
233 pr_info("UV: OEM IDs %s/%s, HUBLESS\n",
234 oem_id, oem_table_id);
235 }
236 return 0;
237 }
238
239 if (numa_off) {
240 pr_err("UV: NUMA is off, disabling UV support\n");
241 return 0;
242 }
243
244 /* Set up early hub type field in uv_hub_info for Node 0 */
245 uv_cpu_info->p_uv_hub_info = &uv_hub_info_node0;
246
247 /*
248 * Determine UV arch type.
249 * SGI: UV100/1000
250 * SGI2: UV2000/3000
251 * SGI3: UV300 (truncated to 4 chars because of different varieties)
252 * SGI4: UV400 (truncated to 4 chars because of different varieties)
253 */
254 uv_hub_info->hub_revision =
255 !strncmp(oem_id, "SGI4", 4) ? UV4_HUB_REVISION_BASE :
256 !strncmp(oem_id, "SGI3", 4) ? UV3_HUB_REVISION_BASE :
257 !strcmp(oem_id, "SGI2") ? UV2_HUB_REVISION_BASE :
258 !strcmp(oem_id, "SGI") ? UV1_HUB_REVISION_BASE : 0;
259
260 if (uv_hub_info->hub_revision == 0)
261 goto badbios;
262
263 pnodeid = early_get_pnodeid();
264 early_get_apic_socketid_shift();
265
266 x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
267 x86_platform.nmi_init = uv_nmi_init;
268
269 if (!strcmp(oem_table_id, "UVX")) {
270 /* This is the most common hardware variant: */
271 uv_system_type = UV_X2APIC;
272 uv_apic = 0;
273
274 } else if (!strcmp(oem_table_id, "UVH")) {
275 /* Only UV1 systems: */
276 uv_system_type = UV_NON_UNIQUE_APIC;
277 __this_cpu_write(x2apic_extra_bits, pnodeid << uvh_apicid.s.pnode_shift);
278 uv_set_apicid_hibit();
279 uv_apic = 1;
280
281 } else if (!strcmp(oem_table_id, "UVL")) {
282 /* Only used for very small systems: */
283 uv_system_type = UV_LEGACY_APIC;
284 uv_apic = 0;
285
286 } else {
287 goto badbios;
288 }
289
290 pr_info("UV: OEM IDs %s/%s, System/HUB Types %d/%d, uv_apic %d\n", oem_id, oem_table_id, uv_system_type, uv_min_hub_revision_id, uv_apic);
291
292 return uv_apic;
293
294 badbios:
295 pr_err("UV: OEM_ID:%s OEM_TABLE_ID:%s\n", oem_id, oem_table_id);
296 pr_err("Current BIOS not supported, update kernel and/or BIOS\n");
297 BUG();
298 }
299
300 enum uv_system_type get_uv_system_type(void)
301 {
302 return uv_system_type;
303 }
304
305 int is_uv_system(void)
306 {
307 return uv_system_type != UV_NONE;
308 }
309 EXPORT_SYMBOL_GPL(is_uv_system);
310
311 int is_uv_hubless(void)
312 {
313 return uv_hubless_system;
314 }
315 EXPORT_SYMBOL_GPL(is_uv_hubless);
316
317 void **__uv_hub_info_list;
318 EXPORT_SYMBOL_GPL(__uv_hub_info_list);
319
320 DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
321 EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info);
322
323 short uv_possible_blades;
324 EXPORT_SYMBOL_GPL(uv_possible_blades);
325
326 unsigned long sn_rtc_cycles_per_second;
327 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
328
329 /* The following values are used for the per node hub info struct */
330 static __initdata unsigned short *_node_to_pnode;
331 static __initdata unsigned short _min_socket, _max_socket;
332 static __initdata unsigned short _min_pnode, _max_pnode, _gr_table_len;
333 static __initdata struct uv_gam_range_entry *uv_gre_table;
334 static __initdata struct uv_gam_parameters *uv_gp_table;
335 static __initdata unsigned short *_socket_to_node;
336 static __initdata unsigned short *_socket_to_pnode;
337 static __initdata unsigned short *_pnode_to_socket;
338
339 static __initdata struct uv_gam_range_s *_gr_table;
340
341 #define SOCK_EMPTY ((unsigned short)~0)
342
343 extern int uv_hub_info_version(void)
344 {
345 return UV_HUB_INFO_VERSION;
346 }
347 EXPORT_SYMBOL(uv_hub_info_version);
348
349 /* Build GAM range lookup table: */
350 static __init void build_uv_gr_table(void)
351 {
352 struct uv_gam_range_entry *gre = uv_gre_table;
353 struct uv_gam_range_s *grt;
354 unsigned long last_limit = 0, ram_limit = 0;
355 int bytes, i, sid, lsid = -1, indx = 0, lindx = -1;
356
357 if (!gre)
358 return;
359
360 bytes = _gr_table_len * sizeof(struct uv_gam_range_s);
361 grt = kzalloc(bytes, GFP_KERNEL);
362 BUG_ON(!grt);
363 _gr_table = grt;
364
365 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
366 if (gre->type == UV_GAM_RANGE_TYPE_HOLE) {
367 if (!ram_limit) {
368 /* Mark hole between RAM/non-RAM: */
369 ram_limit = last_limit;
370 last_limit = gre->limit;
371 lsid++;
372 continue;
373 }
374 last_limit = gre->limit;
375 pr_info("UV: extra hole in GAM RE table @%d\n", (int)(gre - uv_gre_table));
376 continue;
377 }
378 if (_max_socket < gre->sockid) {
379 pr_err("UV: GAM table sockid(%d) too large(>%d) @%d\n", gre->sockid, _max_socket, (int)(gre - uv_gre_table));
380 continue;
381 }
382 sid = gre->sockid - _min_socket;
383 if (lsid < sid) {
384 /* New range: */
385 grt = &_gr_table[indx];
386 grt->base = lindx;
387 grt->nasid = gre->nasid;
388 grt->limit = last_limit = gre->limit;
389 lsid = sid;
390 lindx = indx++;
391 continue;
392 }
393 /* Update range: */
394 if (lsid == sid && !ram_limit) {
395 /* .. if contiguous: */
396 if (grt->limit == last_limit) {
397 grt->limit = last_limit = gre->limit;
398 continue;
399 }
400 }
401 /* Non-contiguous RAM range: */
402 if (!ram_limit) {
403 grt++;
404 grt->base = lindx;
405 grt->nasid = gre->nasid;
406 grt->limit = last_limit = gre->limit;
407 continue;
408 }
409 /* Non-contiguous/non-RAM: */
410 grt++;
411 /* base is this entry */
412 grt->base = grt - _gr_table;
413 grt->nasid = gre->nasid;
414 grt->limit = last_limit = gre->limit;
415 lsid++;
416 }
417
418 /* Shorten table if possible */
419 grt++;
420 i = grt - _gr_table;
421 if (i < _gr_table_len) {
422 void *ret;
423
424 bytes = i * sizeof(struct uv_gam_range_s);
425 ret = krealloc(_gr_table, bytes, GFP_KERNEL);
426 if (ret) {
427 _gr_table = ret;
428 _gr_table_len = i;
429 }
430 }
431
432 /* Display resultant GAM range table: */
433 for (i = 0, grt = _gr_table; i < _gr_table_len; i++, grt++) {
434 unsigned long start, end;
435 int gb = grt->base;
436
437 start = gb < 0 ? 0 : (unsigned long)_gr_table[gb].limit << UV_GAM_RANGE_SHFT;
438 end = (unsigned long)grt->limit << UV_GAM_RANGE_SHFT;
439
440 pr_info("UV: GAM Range %2d %04x 0x%013lx-0x%013lx (%d)\n", i, grt->nasid, start, end, gb);
441 }
442 }
443
444 static int uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
445 {
446 unsigned long val;
447 int pnode;
448
449 pnode = uv_apicid_to_pnode(phys_apicid);
450 phys_apicid |= uv_apicid_hibits;
451
452 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
453 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
454 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
455 APIC_DM_INIT;
456
457 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
458
459 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
460 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
461 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
462 APIC_DM_STARTUP;
463
464 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
465
466 return 0;
467 }
468
469 static void uv_send_IPI_one(int cpu, int vector)
470 {
471 unsigned long apicid;
472 int pnode;
473
474 apicid = per_cpu(x86_cpu_to_apicid, cpu);
475 pnode = uv_apicid_to_pnode(apicid);
476 uv_hub_send_ipi(pnode, apicid, vector);
477 }
478
479 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
480 {
481 unsigned int cpu;
482
483 for_each_cpu(cpu, mask)
484 uv_send_IPI_one(cpu, vector);
485 }
486
487 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
488 {
489 unsigned int this_cpu = smp_processor_id();
490 unsigned int cpu;
491
492 for_each_cpu(cpu, mask) {
493 if (cpu != this_cpu)
494 uv_send_IPI_one(cpu, vector);
495 }
496 }
497
498 static void uv_send_IPI_allbutself(int vector)
499 {
500 unsigned int this_cpu = smp_processor_id();
501 unsigned int cpu;
502
503 for_each_online_cpu(cpu) {
504 if (cpu != this_cpu)
505 uv_send_IPI_one(cpu, vector);
506 }
507 }
508
509 static void uv_send_IPI_all(int vector)
510 {
511 uv_send_IPI_mask(cpu_online_mask, vector);
512 }
513
514 static int uv_apic_id_valid(int apicid)
515 {
516 return 1;
517 }
518
519 static int uv_apic_id_registered(void)
520 {
521 return 1;
522 }
523
524 static void uv_init_apic_ldr(void)
525 {
526 }
527
528 static int
529 uv_cpu_mask_to_apicid(const struct cpumask *mask, struct irq_data *irqdata,
530 unsigned int *apicid)
531 {
532 int ret = default_cpu_mask_to_apicid(mask, irqdata, apicid);
533
534 if (!ret)
535 *apicid |= uv_apicid_hibits;
536
537 return ret;
538 }
539
540 static unsigned int x2apic_get_apic_id(unsigned long x)
541 {
542 unsigned int id;
543
544 WARN_ON(preemptible() && num_online_cpus() > 1);
545 id = x | __this_cpu_read(x2apic_extra_bits);
546
547 return id;
548 }
549
550 static unsigned long set_apic_id(unsigned int id)
551 {
552 /* CHECKME: Do we need to mask out the xapic extra bits? */
553 return id;
554 }
555
556 static unsigned int uv_read_apic_id(void)
557 {
558 return x2apic_get_apic_id(apic_read(APIC_ID));
559 }
560
561 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
562 {
563 return uv_read_apic_id() >> index_msb;
564 }
565
566 static void uv_send_IPI_self(int vector)
567 {
568 apic_write(APIC_SELF_IPI, vector);
569 }
570
571 static int uv_probe(void)
572 {
573 return apic == &apic_x2apic_uv_x;
574 }
575
576 static struct apic apic_x2apic_uv_x __ro_after_init = {
577
578 .name = "UV large system",
579 .probe = uv_probe,
580 .acpi_madt_oem_check = uv_acpi_madt_oem_check,
581 .apic_id_valid = uv_apic_id_valid,
582 .apic_id_registered = uv_apic_id_registered,
583
584 .irq_delivery_mode = dest_Fixed,
585 .irq_dest_mode = 0, /* Physical */
586
587 .target_cpus = online_target_cpus,
588 .disable_esr = 0,
589 .dest_logical = APIC_DEST_LOGICAL,
590 .check_apicid_used = NULL,
591
592 .vector_allocation_domain = default_vector_allocation_domain,
593 .init_apic_ldr = uv_init_apic_ldr,
594
595 .ioapic_phys_id_map = NULL,
596 .setup_apic_routing = NULL,
597 .cpu_present_to_apicid = default_cpu_present_to_apicid,
598 .apicid_to_cpu_present = NULL,
599 .check_phys_apicid_present = default_check_phys_apicid_present,
600 .phys_pkg_id = uv_phys_pkg_id,
601
602 .get_apic_id = x2apic_get_apic_id,
603 .set_apic_id = set_apic_id,
604
605 .cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
606
607 .send_IPI = uv_send_IPI_one,
608 .send_IPI_mask = uv_send_IPI_mask,
609 .send_IPI_mask_allbutself = uv_send_IPI_mask_allbutself,
610 .send_IPI_allbutself = uv_send_IPI_allbutself,
611 .send_IPI_all = uv_send_IPI_all,
612 .send_IPI_self = uv_send_IPI_self,
613
614 .wakeup_secondary_cpu = uv_wakeup_secondary,
615 .inquire_remote_apic = NULL,
616
617 .read = native_apic_msr_read,
618 .write = native_apic_msr_write,
619 .eoi_write = native_apic_msr_eoi_write,
620 .icr_read = native_x2apic_icr_read,
621 .icr_write = native_x2apic_icr_write,
622 .wait_icr_idle = native_x2apic_wait_icr_idle,
623 .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
624 };
625
626 static void set_x2apic_extra_bits(int pnode)
627 {
628 __this_cpu_write(x2apic_extra_bits, pnode << uvh_apicid.s.pnode_shift);
629 }
630
631 #define UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH 3
632 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
633
634 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
635 {
636 union uvh_rh_gam_alias210_overlay_config_2_mmr_u alias;
637 union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
638 unsigned long m_redirect;
639 unsigned long m_overlay;
640 int i;
641
642 for (i = 0; i < UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH; i++) {
643 switch (i) {
644 case 0:
645 m_redirect = UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR;
646 m_overlay = UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_0_MMR;
647 break;
648 case 1:
649 m_redirect = UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR;
650 m_overlay = UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_1_MMR;
651 break;
652 case 2:
653 m_redirect = UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR;
654 m_overlay = UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_2_MMR;
655 break;
656 }
657 alias.v = uv_read_local_mmr(m_overlay);
658 if (alias.s.enable && alias.s.base == 0) {
659 *size = (1UL << alias.s.m_alias);
660 redirect.v = uv_read_local_mmr(m_redirect);
661 *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
662 return;
663 }
664 }
665 *base = *size = 0;
666 }
667
668 enum map_type {map_wb, map_uc};
669
670 static __init void map_high(char *id, unsigned long base, int pshift, int bshift, int max_pnode, enum map_type map_type)
671 {
672 unsigned long bytes, paddr;
673
674 paddr = base << pshift;
675 bytes = (1UL << bshift) * (max_pnode + 1);
676 if (!paddr) {
677 pr_info("UV: Map %s_HI base address NULL\n", id);
678 return;
679 }
680 pr_debug("UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr, paddr + bytes);
681 if (map_type == map_uc)
682 init_extra_mapping_uc(paddr, bytes);
683 else
684 init_extra_mapping_wb(paddr, bytes);
685 }
686
687 static __init void map_gru_distributed(unsigned long c)
688 {
689 union uvh_rh_gam_gru_overlay_config_mmr_u gru;
690 u64 paddr;
691 unsigned long bytes;
692 int nid;
693
694 gru.v = c;
695
696 /* Only base bits 42:28 relevant in dist mode */
697 gru_dist_base = gru.v & 0x000007fff0000000UL;
698 if (!gru_dist_base) {
699 pr_info("UV: Map GRU_DIST base address NULL\n");
700 return;
701 }
702
703 bytes = 1UL << UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
704 gru_dist_lmask = ((1UL << uv_hub_info->m_val) - 1) & ~(bytes - 1);
705 gru_dist_umask = ~((1UL << uv_hub_info->m_val) - 1);
706 gru_dist_base &= gru_dist_lmask; /* Clear bits above M */
707
708 for_each_online_node(nid) {
709 paddr = ((u64)uv_node_to_pnode(nid) << uv_hub_info->m_val) |
710 gru_dist_base;
711 init_extra_mapping_wb(paddr, bytes);
712 gru_first_node_paddr = min(paddr, gru_first_node_paddr);
713 gru_last_node_paddr = max(paddr, gru_last_node_paddr);
714 }
715
716 /* Save upper (63:M) bits of address only for is_GRU_range */
717 gru_first_node_paddr &= gru_dist_umask;
718 gru_last_node_paddr &= gru_dist_umask;
719
720 pr_debug("UV: Map GRU_DIST base 0x%016llx 0x%016llx - 0x%016llx\n", gru_dist_base, gru_first_node_paddr, gru_last_node_paddr);
721 }
722
723 static __init void map_gru_high(int max_pnode)
724 {
725 union uvh_rh_gam_gru_overlay_config_mmr_u gru;
726 int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
727 unsigned long mask = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_MASK;
728 unsigned long base;
729
730 gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
731 if (!gru.s.enable) {
732 pr_info("UV: GRU disabled\n");
733 return;
734 }
735
736 if (is_uv3_hub() && gru.s3.mode) {
737 map_gru_distributed(gru.v);
738 return;
739 }
740
741 base = (gru.v & mask) >> shift;
742 map_high("GRU", base, shift, shift, max_pnode, map_wb);
743 gru_start_paddr = ((u64)base << shift);
744 gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
745 }
746
747 static __init void map_mmr_high(int max_pnode)
748 {
749 union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
750 int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
751
752 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
753 if (mmr.s.enable)
754 map_high("MMR", mmr.s.base, shift, shift, max_pnode, map_uc);
755 else
756 pr_info("UV: MMR disabled\n");
757 }
758
759 /*
760 * This commonality works because both 0 & 1 versions of the MMIOH OVERLAY
761 * and REDIRECT MMR regs are exactly the same on UV3.
762 */
763 struct mmioh_config {
764 unsigned long overlay;
765 unsigned long redirect;
766 char *id;
767 };
768
769 static __initdata struct mmioh_config mmiohs[] = {
770 {
771 UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR,
772 UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR,
773 "MMIOH0"
774 },
775 {
776 UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR,
777 UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG1_MMR,
778 "MMIOH1"
779 },
780 };
781
782 /* UV3 & UV4 have identical MMIOH overlay configs */
783 static __init void map_mmioh_high_uv3(int index, int min_pnode, int max_pnode)
784 {
785 union uv3h_rh_gam_mmioh_overlay_config0_mmr_u overlay;
786 unsigned long mmr;
787 unsigned long base;
788 int i, n, shift, m_io, max_io;
789 int nasid, lnasid, fi, li;
790 char *id;
791
792 id = mmiohs[index].id;
793 overlay.v = uv_read_local_mmr(mmiohs[index].overlay);
794
795 pr_info("UV: %s overlay 0x%lx base:0x%x m_io:%d\n", id, overlay.v, overlay.s3.base, overlay.s3.m_io);
796 if (!overlay.s3.enable) {
797 pr_info("UV: %s disabled\n", id);
798 return;
799 }
800
801 shift = UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_BASE_SHFT;
802 base = (unsigned long)overlay.s3.base;
803 m_io = overlay.s3.m_io;
804 mmr = mmiohs[index].redirect;
805 n = UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR_DEPTH;
806 /* Convert to NASID: */
807 min_pnode *= 2;
808 max_pnode *= 2;
809 max_io = lnasid = fi = li = -1;
810
811 for (i = 0; i < n; i++) {
812 union uv3h_rh_gam_mmioh_redirect_config0_mmr_u redirect;
813
814 redirect.v = uv_read_local_mmr(mmr + i * 8);
815 nasid = redirect.s3.nasid;
816 /* Invalid NASID: */
817 if (nasid < min_pnode || max_pnode < nasid)
818 nasid = -1;
819
820 if (nasid == lnasid) {
821 li = i;
822 /* Last entry check: */
823 if (i != n-1)
824 continue;
825 }
826
827 /* Check if we have a cached (or last) redirect to print: */
828 if (lnasid != -1 || (i == n-1 && nasid != -1)) {
829 unsigned long addr1, addr2;
830 int f, l;
831
832 if (lnasid == -1) {
833 f = l = i;
834 lnasid = nasid;
835 } else {
836 f = fi;
837 l = li;
838 }
839 addr1 = (base << shift) + f * (1ULL << m_io);
840 addr2 = (base << shift) + (l + 1) * (1ULL << m_io);
841 pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n", id, fi, li, lnasid, addr1, addr2);
842 if (max_io < l)
843 max_io = l;
844 }
845 fi = li = i;
846 lnasid = nasid;
847 }
848
849 pr_info("UV: %s base:0x%lx shift:%d M_IO:%d MAX_IO:%d\n", id, base, shift, m_io, max_io);
850
851 if (max_io >= 0)
852 map_high(id, base, shift, m_io, max_io, map_uc);
853 }
854
855 static __init void map_mmioh_high(int min_pnode, int max_pnode)
856 {
857 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
858 unsigned long mmr, base;
859 int shift, enable, m_io, n_io;
860
861 if (is_uv3_hub() || is_uv4_hub()) {
862 /* Map both MMIOH regions: */
863 map_mmioh_high_uv3(0, min_pnode, max_pnode);
864 map_mmioh_high_uv3(1, min_pnode, max_pnode);
865 return;
866 }
867
868 if (is_uv1_hub()) {
869 mmr = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
870 shift = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
871 mmioh.v = uv_read_local_mmr(mmr);
872 enable = !!mmioh.s1.enable;
873 base = mmioh.s1.base;
874 m_io = mmioh.s1.m_io;
875 n_io = mmioh.s1.n_io;
876 } else if (is_uv2_hub()) {
877 mmr = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
878 shift = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
879 mmioh.v = uv_read_local_mmr(mmr);
880 enable = !!mmioh.s2.enable;
881 base = mmioh.s2.base;
882 m_io = mmioh.s2.m_io;
883 n_io = mmioh.s2.n_io;
884 } else {
885 return;
886 }
887
888 if (enable) {
889 max_pnode &= (1 << n_io) - 1;
890 pr_info("UV: base:0x%lx shift:%d N_IO:%d M_IO:%d max_pnode:0x%x\n", base, shift, m_io, n_io, max_pnode);
891 map_high("MMIOH", base, shift, m_io, max_pnode, map_uc);
892 } else {
893 pr_info("UV: MMIOH disabled\n");
894 }
895 }
896
897 static __init void map_low_mmrs(void)
898 {
899 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
900 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
901 }
902
903 static __init void uv_rtc_init(void)
904 {
905 long status;
906 u64 ticks_per_sec;
907
908 status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec);
909
910 if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
911 pr_warn("UV: unable to determine platform RTC clock frequency, guessing.\n");
912
913 /* BIOS gives wrong value for clock frequency, so guess: */
914 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
915 } else {
916 sn_rtc_cycles_per_second = ticks_per_sec;
917 }
918 }
919
920 /*
921 * percpu heartbeat timer
922 */
923 static void uv_heartbeat(struct timer_list *timer)
924 {
925 unsigned char bits = uv_scir_info->state;
926
927 /* Flip heartbeat bit: */
928 bits ^= SCIR_CPU_HEARTBEAT;
929
930 /* Is this CPU idle? */
931 if (idle_cpu(raw_smp_processor_id()))
932 bits &= ~SCIR_CPU_ACTIVITY;
933 else
934 bits |= SCIR_CPU_ACTIVITY;
935
936 /* Update system controller interface reg: */
937 uv_set_scir_bits(bits);
938
939 /* Enable next timer period: */
940 mod_timer(timer, jiffies + SCIR_CPU_HB_INTERVAL);
941 }
942
943 static int uv_heartbeat_enable(unsigned int cpu)
944 {
945 while (!uv_cpu_scir_info(cpu)->enabled) {
946 struct timer_list *timer = &uv_cpu_scir_info(cpu)->timer;
947
948 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
949 timer_setup(timer, uv_heartbeat, TIMER_PINNED);
950 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
951 add_timer_on(timer, cpu);
952 uv_cpu_scir_info(cpu)->enabled = 1;
953
954 /* Also ensure that boot CPU is enabled: */
955 cpu = 0;
956 }
957 return 0;
958 }
959
960 #ifdef CONFIG_HOTPLUG_CPU
961 static int uv_heartbeat_disable(unsigned int cpu)
962 {
963 if (uv_cpu_scir_info(cpu)->enabled) {
964 uv_cpu_scir_info(cpu)->enabled = 0;
965 del_timer(&uv_cpu_scir_info(cpu)->timer);
966 }
967 uv_set_cpu_scir_bits(cpu, 0xff);
968 return 0;
969 }
970
971 static __init void uv_scir_register_cpu_notifier(void)
972 {
973 cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "x86/x2apic-uvx:online",
974 uv_heartbeat_enable, uv_heartbeat_disable);
975 }
976
977 #else /* !CONFIG_HOTPLUG_CPU */
978
979 static __init void uv_scir_register_cpu_notifier(void)
980 {
981 }
982
983 static __init int uv_init_heartbeat(void)
984 {
985 int cpu;
986
987 if (is_uv_system()) {
988 for_each_online_cpu(cpu)
989 uv_heartbeat_enable(cpu);
990 }
991
992 return 0;
993 }
994
995 late_initcall(uv_init_heartbeat);
996
997 #endif /* !CONFIG_HOTPLUG_CPU */
998
999 /* Direct Legacy VGA I/O traffic to designated IOH */
1000 int uv_set_vga_state(struct pci_dev *pdev, bool decode, unsigned int command_bits, u32 flags)
1001 {
1002 int domain, bus, rc;
1003
1004 if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE))
1005 return 0;
1006
1007 if ((command_bits & PCI_COMMAND_IO) == 0)
1008 return 0;
1009
1010 domain = pci_domain_nr(pdev->bus);
1011 bus = pdev->bus->number;
1012
1013 rc = uv_bios_set_legacy_vga_target(decode, domain, bus);
1014
1015 return rc;
1016 }
1017
1018 /*
1019 * Called on each CPU to initialize the per_cpu UV data area.
1020 * FIXME: hotplug not supported yet
1021 */
1022 void uv_cpu_init(void)
1023 {
1024 /* CPU 0 initialization will be done via uv_system_init. */
1025 if (smp_processor_id() == 0)
1026 return;
1027
1028 uv_hub_info->nr_online_cpus++;
1029
1030 if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
1031 set_x2apic_extra_bits(uv_hub_info->pnode);
1032 }
1033
1034 struct mn {
1035 unsigned char m_val;
1036 unsigned char n_val;
1037 unsigned char m_shift;
1038 unsigned char n_lshift;
1039 };
1040
1041 static void get_mn(struct mn *mnp)
1042 {
1043 union uvh_rh_gam_config_mmr_u m_n_config;
1044 union uv3h_gr0_gam_gr_config_u m_gr_config;
1045
1046 /* Make sure the whole structure is well initialized: */
1047 memset(mnp, 0, sizeof(*mnp));
1048
1049 m_n_config.v = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR);
1050 mnp->n_val = m_n_config.s.n_skt;
1051
1052 if (is_uv4_hub()) {
1053 mnp->m_val = 0;
1054 mnp->n_lshift = 0;
1055 } else if (is_uv3_hub()) {
1056 mnp->m_val = m_n_config.s3.m_skt;
1057 m_gr_config.v = uv_read_local_mmr(UV3H_GR0_GAM_GR_CONFIG);
1058 mnp->n_lshift = m_gr_config.s3.m_skt;
1059 } else if (is_uv2_hub()) {
1060 mnp->m_val = m_n_config.s2.m_skt;
1061 mnp->n_lshift = mnp->m_val == 40 ? 40 : 39;
1062 } else if (is_uv1_hub()) {
1063 mnp->m_val = m_n_config.s1.m_skt;
1064 mnp->n_lshift = mnp->m_val;
1065 }
1066 mnp->m_shift = mnp->m_val ? 64 - mnp->m_val : 0;
1067 }
1068
1069 void __init uv_init_hub_info(struct uv_hub_info_s *hi)
1070 {
1071 union uvh_node_id_u node_id;
1072 struct mn mn;
1073
1074 get_mn(&mn);
1075 hi->gpa_mask = mn.m_val ?
1076 (1UL << (mn.m_val + mn.n_val)) - 1 :
1077 (1UL << uv_cpuid.gpa_shift) - 1;
1078
1079 hi->m_val = mn.m_val;
1080 hi->n_val = mn.n_val;
1081 hi->m_shift = mn.m_shift;
1082 hi->n_lshift = mn.n_lshift ? mn.n_lshift : 0;
1083 hi->hub_revision = uv_hub_info->hub_revision;
1084 hi->pnode_mask = uv_cpuid.pnode_mask;
1085 hi->min_pnode = _min_pnode;
1086 hi->min_socket = _min_socket;
1087 hi->pnode_to_socket = _pnode_to_socket;
1088 hi->socket_to_node = _socket_to_node;
1089 hi->socket_to_pnode = _socket_to_pnode;
1090 hi->gr_table_len = _gr_table_len;
1091 hi->gr_table = _gr_table;
1092
1093 node_id.v = uv_read_local_mmr(UVH_NODE_ID);
1094 uv_cpuid.gnode_shift = max_t(unsigned int, uv_cpuid.gnode_shift, mn.n_val);
1095 hi->gnode_extra = (node_id.s.node_id & ~((1 << uv_cpuid.gnode_shift) - 1)) >> 1;
1096 if (mn.m_val)
1097 hi->gnode_upper = (u64)hi->gnode_extra << mn.m_val;
1098
1099 if (uv_gp_table) {
1100 hi->global_mmr_base = uv_gp_table->mmr_base;
1101 hi->global_mmr_shift = uv_gp_table->mmr_shift;
1102 hi->global_gru_base = uv_gp_table->gru_base;
1103 hi->global_gru_shift = uv_gp_table->gru_shift;
1104 hi->gpa_shift = uv_gp_table->gpa_shift;
1105 hi->gpa_mask = (1UL << hi->gpa_shift) - 1;
1106 } else {
1107 hi->global_mmr_base = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) & ~UV_MMR_ENABLE;
1108 hi->global_mmr_shift = _UV_GLOBAL_MMR64_PNODE_SHIFT;
1109 }
1110
1111 get_lowmem_redirect(&hi->lowmem_remap_base, &hi->lowmem_remap_top);
1112
1113 hi->apic_pnode_shift = uv_cpuid.socketid_shift;
1114
1115 /* Show system specific info: */
1116 pr_info("UV: N:%d M:%d m_shift:%d n_lshift:%d\n", hi->n_val, hi->m_val, hi->m_shift, hi->n_lshift);
1117 pr_info("UV: gpa_mask/shift:0x%lx/%d pnode_mask:0x%x apic_pns:%d\n", hi->gpa_mask, hi->gpa_shift, hi->pnode_mask, hi->apic_pnode_shift);
1118 pr_info("UV: mmr_base/shift:0x%lx/%ld gru_base/shift:0x%lx/%ld\n", hi->global_mmr_base, hi->global_mmr_shift, hi->global_gru_base, hi->global_gru_shift);
1119 pr_info("UV: gnode_upper:0x%lx gnode_extra:0x%x\n", hi->gnode_upper, hi->gnode_extra);
1120 }
1121
1122 static void __init decode_gam_params(unsigned long ptr)
1123 {
1124 uv_gp_table = (struct uv_gam_parameters *)ptr;
1125
1126 pr_info("UV: GAM Params...\n");
1127 pr_info("UV: mmr_base/shift:0x%llx/%d gru_base/shift:0x%llx/%d gpa_shift:%d\n",
1128 uv_gp_table->mmr_base, uv_gp_table->mmr_shift,
1129 uv_gp_table->gru_base, uv_gp_table->gru_shift,
1130 uv_gp_table->gpa_shift);
1131 }
1132
1133 static void __init decode_gam_rng_tbl(unsigned long ptr)
1134 {
1135 struct uv_gam_range_entry *gre = (struct uv_gam_range_entry *)ptr;
1136 unsigned long lgre = 0;
1137 int index = 0;
1138 int sock_min = 999999, pnode_min = 99999;
1139 int sock_max = -1, pnode_max = -1;
1140
1141 uv_gre_table = gre;
1142 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1143 if (!index) {
1144 pr_info("UV: GAM Range Table...\n");
1145 pr_info("UV: # %20s %14s %5s %4s %5s %3s %2s\n", "Range", "", "Size", "Type", "NASID", "SID", "PN");
1146 }
1147 pr_info("UV: %2d: 0x%014lx-0x%014lx %5luG %3d %04x %02x %02x\n",
1148 index++,
1149 (unsigned long)lgre << UV_GAM_RANGE_SHFT,
1150 (unsigned long)gre->limit << UV_GAM_RANGE_SHFT,
1151 ((unsigned long)(gre->limit - lgre)) >>
1152 (30 - UV_GAM_RANGE_SHFT), /* 64M -> 1G */
1153 gre->type, gre->nasid, gre->sockid, gre->pnode);
1154
1155 lgre = gre->limit;
1156 if (sock_min > gre->sockid)
1157 sock_min = gre->sockid;
1158 if (sock_max < gre->sockid)
1159 sock_max = gre->sockid;
1160 if (pnode_min > gre->pnode)
1161 pnode_min = gre->pnode;
1162 if (pnode_max < gre->pnode)
1163 pnode_max = gre->pnode;
1164 }
1165 _min_socket = sock_min;
1166 _max_socket = sock_max;
1167 _min_pnode = pnode_min;
1168 _max_pnode = pnode_max;
1169 _gr_table_len = index;
1170
1171 pr_info("UV: GRT: %d entries, sockets(min:%x,max:%x) pnodes(min:%x,max:%x)\n", index, _min_socket, _max_socket, _min_pnode, _max_pnode);
1172 }
1173
1174 static int __init decode_uv_systab(void)
1175 {
1176 struct uv_systab *st;
1177 int i;
1178
1179 if (uv_hub_info->hub_revision < UV4_HUB_REVISION_BASE)
1180 return 0; /* No extended UVsystab required */
1181
1182 st = uv_systab;
1183 if ((!st) || (st->revision < UV_SYSTAB_VERSION_UV4_LATEST)) {
1184 int rev = st ? st->revision : 0;
1185
1186 pr_err("UV: BIOS UVsystab version(%x) mismatch, expecting(%x)\n", rev, UV_SYSTAB_VERSION_UV4_LATEST);
1187 pr_err("UV: Cannot support UV operations, switching to generic PC\n");
1188 uv_system_type = UV_NONE;
1189
1190 return -EINVAL;
1191 }
1192
1193 for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) {
1194 unsigned long ptr = st->entry[i].offset;
1195
1196 if (!ptr)
1197 continue;
1198
1199 ptr = ptr + (unsigned long)st;
1200
1201 switch (st->entry[i].type) {
1202 case UV_SYSTAB_TYPE_GAM_PARAMS:
1203 decode_gam_params(ptr);
1204 break;
1205
1206 case UV_SYSTAB_TYPE_GAM_RNG_TBL:
1207 decode_gam_rng_tbl(ptr);
1208 break;
1209 }
1210 }
1211 return 0;
1212 }
1213
1214 /*
1215 * Set up physical blade translations from UVH_NODE_PRESENT_TABLE
1216 * .. NB: UVH_NODE_PRESENT_TABLE is going away,
1217 * .. being replaced by GAM Range Table
1218 */
1219 static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
1220 {
1221 int i, uv_pb = 0;
1222
1223 pr_info("UV: NODE_PRESENT_DEPTH = %d\n", UVH_NODE_PRESENT_TABLE_DEPTH);
1224 for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
1225 unsigned long np;
1226
1227 np = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
1228 if (np)
1229 pr_info("UV: NODE_PRESENT(%d) = 0x%016lx\n", i, np);
1230
1231 uv_pb += hweight64(np);
1232 }
1233 if (uv_possible_blades != uv_pb)
1234 uv_possible_blades = uv_pb;
1235 }
1236
1237 static void __init build_socket_tables(void)
1238 {
1239 struct uv_gam_range_entry *gre = uv_gre_table;
1240 int num, nump;
1241 int cpu, i, lnid;
1242 int minsock = _min_socket;
1243 int maxsock = _max_socket;
1244 int minpnode = _min_pnode;
1245 int maxpnode = _max_pnode;
1246 size_t bytes;
1247
1248 if (!gre) {
1249 if (is_uv1_hub() || is_uv2_hub() || is_uv3_hub()) {
1250 pr_info("UV: No UVsystab socket table, ignoring\n");
1251 return;
1252 }
1253 pr_crit("UV: Error: UVsystab address translations not available!\n");
1254 BUG();
1255 }
1256
1257 /* Build socket id -> node id, pnode */
1258 num = maxsock - minsock + 1;
1259 bytes = num * sizeof(_socket_to_node[0]);
1260 _socket_to_node = kmalloc(bytes, GFP_KERNEL);
1261 _socket_to_pnode = kmalloc(bytes, GFP_KERNEL);
1262
1263 nump = maxpnode - minpnode + 1;
1264 bytes = nump * sizeof(_pnode_to_socket[0]);
1265 _pnode_to_socket = kmalloc(bytes, GFP_KERNEL);
1266 BUG_ON(!_socket_to_node || !_socket_to_pnode || !_pnode_to_socket);
1267
1268 for (i = 0; i < num; i++)
1269 _socket_to_node[i] = _socket_to_pnode[i] = SOCK_EMPTY;
1270
1271 for (i = 0; i < nump; i++)
1272 _pnode_to_socket[i] = SOCK_EMPTY;
1273
1274 /* Fill in pnode/node/addr conversion list values: */
1275 pr_info("UV: GAM Building socket/pnode conversion tables\n");
1276 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1277 if (gre->type == UV_GAM_RANGE_TYPE_HOLE)
1278 continue;
1279 i = gre->sockid - minsock;
1280 /* Duplicate: */
1281 if (_socket_to_pnode[i] != SOCK_EMPTY)
1282 continue;
1283 _socket_to_pnode[i] = gre->pnode;
1284
1285 i = gre->pnode - minpnode;
1286 _pnode_to_socket[i] = gre->sockid;
1287
1288 pr_info("UV: sid:%02x type:%d nasid:%04x pn:%02x pn2s:%2x\n",
1289 gre->sockid, gre->type, gre->nasid,
1290 _socket_to_pnode[gre->sockid - minsock],
1291 _pnode_to_socket[gre->pnode - minpnode]);
1292 }
1293
1294 /* Set socket -> node values: */
1295 lnid = -1;
1296 for_each_present_cpu(cpu) {
1297 int nid = cpu_to_node(cpu);
1298 int apicid, sockid;
1299
1300 if (lnid == nid)
1301 continue;
1302 lnid = nid;
1303 apicid = per_cpu(x86_cpu_to_apicid, cpu);
1304 sockid = apicid >> uv_cpuid.socketid_shift;
1305 _socket_to_node[sockid - minsock] = nid;
1306 pr_info("UV: sid:%02x: apicid:%04x node:%2d\n",
1307 sockid, apicid, nid);
1308 }
1309
1310 /* Set up physical blade to pnode translation from GAM Range Table: */
1311 bytes = num_possible_nodes() * sizeof(_node_to_pnode[0]);
1312 _node_to_pnode = kmalloc(bytes, GFP_KERNEL);
1313 BUG_ON(!_node_to_pnode);
1314
1315 for (lnid = 0; lnid < num_possible_nodes(); lnid++) {
1316 unsigned short sockid;
1317
1318 for (sockid = minsock; sockid <= maxsock; sockid++) {
1319 if (lnid == _socket_to_node[sockid - minsock]) {
1320 _node_to_pnode[lnid] = _socket_to_pnode[sockid - minsock];
1321 break;
1322 }
1323 }
1324 if (sockid > maxsock) {
1325 pr_err("UV: socket for node %d not found!\n", lnid);
1326 BUG();
1327 }
1328 }
1329
1330 /*
1331 * If socket id == pnode or socket id == node for all nodes,
1332 * system runs faster by removing corresponding conversion table.
1333 */
1334 pr_info("UV: Checking socket->node/pnode for identity maps\n");
1335 if (minsock == 0) {
1336 for (i = 0; i < num; i++)
1337 if (_socket_to_node[i] == SOCK_EMPTY || i != _socket_to_node[i])
1338 break;
1339 if (i >= num) {
1340 kfree(_socket_to_node);
1341 _socket_to_node = NULL;
1342 pr_info("UV: 1:1 socket_to_node table removed\n");
1343 }
1344 }
1345 if (minsock == minpnode) {
1346 for (i = 0; i < num; i++)
1347 if (_socket_to_pnode[i] != SOCK_EMPTY &&
1348 _socket_to_pnode[i] != i + minpnode)
1349 break;
1350 if (i >= num) {
1351 kfree(_socket_to_pnode);
1352 _socket_to_pnode = NULL;
1353 pr_info("UV: 1:1 socket_to_pnode table removed\n");
1354 }
1355 }
1356 }
1357
1358 static void __init uv_system_init_hub(void)
1359 {
1360 struct uv_hub_info_s hub_info = {0};
1361 int bytes, cpu, nodeid;
1362 unsigned short min_pnode = 9999, max_pnode = 0;
1363 char *hub = is_uv4_hub() ? "UV400" :
1364 is_uv3_hub() ? "UV300" :
1365 is_uv2_hub() ? "UV2000/3000" :
1366 is_uv1_hub() ? "UV100/1000" : NULL;
1367
1368 if (!hub) {
1369 pr_err("UV: Unknown/unsupported UV hub\n");
1370 return;
1371 }
1372 pr_info("UV: Found %s hub\n", hub);
1373
1374 map_low_mmrs();
1375
1376 /* Get uv_systab for decoding: */
1377 uv_bios_init();
1378
1379 /* If there's an UVsystab problem then abort UV init: */
1380 if (decode_uv_systab() < 0)
1381 return;
1382
1383 build_socket_tables();
1384 build_uv_gr_table();
1385 uv_init_hub_info(&hub_info);
1386 uv_possible_blades = num_possible_nodes();
1387 if (!_node_to_pnode)
1388 boot_init_possible_blades(&hub_info);
1389
1390 /* uv_num_possible_blades() is really the hub count: */
1391 pr_info("UV: Found %d hubs, %d nodes, %d CPUs\n", uv_num_possible_blades(), num_possible_nodes(), num_possible_cpus());
1392
1393 uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id, &sn_region_size, &system_serial_number);
1394 hub_info.coherency_domain_number = sn_coherency_id;
1395 uv_rtc_init();
1396
1397 bytes = sizeof(void *) * uv_num_possible_blades();
1398 __uv_hub_info_list = kzalloc(bytes, GFP_KERNEL);
1399 BUG_ON(!__uv_hub_info_list);
1400
1401 bytes = sizeof(struct uv_hub_info_s);
1402 for_each_node(nodeid) {
1403 struct uv_hub_info_s *new_hub;
1404
1405 if (__uv_hub_info_list[nodeid]) {
1406 pr_err("UV: Node %d UV HUB already initialized!?\n", nodeid);
1407 BUG();
1408 }
1409
1410 /* Allocate new per hub info list */
1411 new_hub = (nodeid == 0) ? &uv_hub_info_node0 : kzalloc_node(bytes, GFP_KERNEL, nodeid);
1412 BUG_ON(!new_hub);
1413 __uv_hub_info_list[nodeid] = new_hub;
1414 new_hub = uv_hub_info_list(nodeid);
1415 BUG_ON(!new_hub);
1416 *new_hub = hub_info;
1417
1418 /* Use information from GAM table if available: */
1419 if (_node_to_pnode)
1420 new_hub->pnode = _node_to_pnode[nodeid];
1421 else /* Or fill in during CPU loop: */
1422 new_hub->pnode = 0xffff;
1423
1424 new_hub->numa_blade_id = uv_node_to_blade_id(nodeid);
1425 new_hub->memory_nid = -1;
1426 new_hub->nr_possible_cpus = 0;
1427 new_hub->nr_online_cpus = 0;
1428 }
1429
1430 /* Initialize per CPU info: */
1431 for_each_possible_cpu(cpu) {
1432 int apicid = per_cpu(x86_cpu_to_apicid, cpu);
1433 int numa_node_id;
1434 unsigned short pnode;
1435
1436 nodeid = cpu_to_node(cpu);
1437 numa_node_id = numa_cpu_node(cpu);
1438 pnode = uv_apicid_to_pnode(apicid);
1439
1440 uv_cpu_info_per(cpu)->p_uv_hub_info = uv_hub_info_list(nodeid);
1441 uv_cpu_info_per(cpu)->blade_cpu_id = uv_cpu_hub_info(cpu)->nr_possible_cpus++;
1442 if (uv_cpu_hub_info(cpu)->memory_nid == -1)
1443 uv_cpu_hub_info(cpu)->memory_nid = cpu_to_node(cpu);
1444
1445 /* Init memoryless node: */
1446 if (nodeid != numa_node_id &&
1447 uv_hub_info_list(numa_node_id)->pnode == 0xffff)
1448 uv_hub_info_list(numa_node_id)->pnode = pnode;
1449 else if (uv_cpu_hub_info(cpu)->pnode == 0xffff)
1450 uv_cpu_hub_info(cpu)->pnode = pnode;
1451
1452 uv_cpu_scir_info(cpu)->offset = uv_scir_offset(apicid);
1453 }
1454
1455 for_each_node(nodeid) {
1456 unsigned short pnode = uv_hub_info_list(nodeid)->pnode;
1457
1458 /* Add pnode info for pre-GAM list nodes without CPUs: */
1459 if (pnode == 0xffff) {
1460 unsigned long paddr;
1461
1462 paddr = node_start_pfn(nodeid) << PAGE_SHIFT;
1463 pnode = uv_gpa_to_pnode(uv_soc_phys_ram_to_gpa(paddr));
1464 uv_hub_info_list(nodeid)->pnode = pnode;
1465 }
1466 min_pnode = min(pnode, min_pnode);
1467 max_pnode = max(pnode, max_pnode);
1468 pr_info("UV: UVHUB node:%2d pn:%02x nrcpus:%d\n",
1469 nodeid,
1470 uv_hub_info_list(nodeid)->pnode,
1471 uv_hub_info_list(nodeid)->nr_possible_cpus);
1472 }
1473
1474 pr_info("UV: min_pnode:%02x max_pnode:%02x\n", min_pnode, max_pnode);
1475 map_gru_high(max_pnode);
1476 map_mmr_high(max_pnode);
1477 map_mmioh_high(min_pnode, max_pnode);
1478
1479 uv_nmi_setup();
1480 uv_cpu_init();
1481 uv_scir_register_cpu_notifier();
1482 proc_mkdir("sgi_uv", NULL);
1483
1484 /* Register Legacy VGA I/O redirection handler: */
1485 pci_register_set_vga_state(uv_set_vga_state);
1486
1487 /*
1488 * For a kdump kernel the reset must be BOOT_ACPI, not BOOT_EFI, as
1489 * EFI is not enabled in the kdump kernel:
1490 */
1491 if (is_kdump_kernel())
1492 reboot_type = BOOT_ACPI;
1493 }
1494
1495 /*
1496 * There is a small amount of UV specific code needed to initialize a
1497 * UV system that does not have a "UV HUB" (referred to as "hubless").
1498 */
1499 void __init uv_system_init(void)
1500 {
1501 if (likely(!is_uv_system() && !is_uv_hubless()))
1502 return;
1503
1504 if (is_uv_system())
1505 uv_system_init_hub();
1506 else
1507 uv_nmi_setup_hubless();
1508 }
1509
1510 apic_driver(apic_x2apic_uv_x);
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