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x86/platform/UV: Bring back the call to map_low_mmrs in uv_system_init
[deliverable/linux.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/module.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/ipi.h>
38 #include <asm/smp.h>
39 #include <asm/x86_init.h>
40 #include <asm/nmi.h>
41
42 DEFINE_PER_CPU(int, x2apic_extra_bits);
43
44 #define PR_DEVEL(fmt, args...) pr_devel("%s: " fmt, __func__, args)
45
46 static enum uv_system_type uv_system_type;
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 int uv_min_hub_revision_id;
52 EXPORT_SYMBOL_GPL(uv_min_hub_revision_id);
53 unsigned int uv_apicid_hibits;
54 EXPORT_SYMBOL_GPL(uv_apicid_hibits);
55
56 static struct apic apic_x2apic_uv_x;
57
58 static unsigned long __init uv_early_read_mmr(unsigned long addr)
59 {
60 unsigned long val, *mmr;
61
62 mmr = early_ioremap(UV_LOCAL_MMR_BASE | addr, sizeof(*mmr));
63 val = *mmr;
64 early_iounmap(mmr, sizeof(*mmr));
65 return val;
66 }
67
68 static inline bool is_GRU_range(u64 start, u64 end)
69 {
70 if (gru_dist_base) {
71 u64 su = start & gru_dist_umask; /* upper (incl pnode) bits */
72 u64 sl = start & gru_dist_lmask; /* base offset bits */
73 u64 eu = end & gru_dist_umask;
74 u64 el = end & gru_dist_lmask;
75
76 /* Must reside completely within a single GRU range */
77 return (sl == gru_dist_base && el == gru_dist_base &&
78 su >= gru_first_node_paddr &&
79 su <= gru_last_node_paddr &&
80 eu == su);
81 } else {
82 return start >= gru_start_paddr && end <= gru_end_paddr;
83 }
84 }
85
86 static bool uv_is_untracked_pat_range(u64 start, u64 end)
87 {
88 return is_ISA_range(start, end) || is_GRU_range(start, end);
89 }
90
91 static int __init early_get_pnodeid(void)
92 {
93 union uvh_node_id_u node_id;
94 union uvh_rh_gam_config_mmr_u m_n_config;
95 int pnode;
96
97 /* Currently, all blades have same revision number */
98 node_id.v = uv_early_read_mmr(UVH_NODE_ID);
99 m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_CONFIG_MMR);
100 uv_min_hub_revision_id = node_id.s.revision;
101
102 switch (node_id.s.part_number) {
103 case UV2_HUB_PART_NUMBER:
104 case UV2_HUB_PART_NUMBER_X:
105 uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1;
106 break;
107 case UV3_HUB_PART_NUMBER:
108 case UV3_HUB_PART_NUMBER_X:
109 uv_min_hub_revision_id += UV3_HUB_REVISION_BASE;
110 break;
111 }
112
113 uv_hub_info->hub_revision = uv_min_hub_revision_id;
114 pnode = (node_id.s.node_id >> 1) & ((1 << m_n_config.s.n_skt) - 1);
115 return pnode;
116 }
117
118 static void __init early_get_apic_pnode_shift(void)
119 {
120 uvh_apicid.v = uv_early_read_mmr(UVH_APICID);
121 if (!uvh_apicid.v)
122 /*
123 * Old bios, use default value
124 */
125 uvh_apicid.s.pnode_shift = UV_APIC_PNODE_SHIFT;
126 }
127
128 /*
129 * Add an extra bit as dictated by bios to the destination apicid of
130 * interrupts potentially passing through the UV HUB. This prevents
131 * a deadlock between interrupts and IO port operations.
132 */
133 static void __init uv_set_apicid_hibit(void)
134 {
135 union uv1h_lb_target_physical_apic_id_mask_u apicid_mask;
136
137 if (is_uv1_hub()) {
138 apicid_mask.v =
139 uv_early_read_mmr(UV1H_LB_TARGET_PHYSICAL_APIC_ID_MASK);
140 uv_apicid_hibits =
141 apicid_mask.s1.bit_enables & UV_APICID_HIBIT_MASK;
142 }
143 }
144
145 static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
146 {
147 int pnodeid;
148 int uv_apic;
149
150 if (strncmp(oem_id, "SGI", 3) != 0)
151 return 0;
152
153 /*
154 * Determine UV arch type.
155 * SGI: UV100/1000
156 * SGI2: UV2000/3000
157 * SGI3: UV300 (truncated to 4 chars because of different varieties)
158 */
159 uv_hub_info->hub_revision =
160 !strncmp(oem_id, "SGI3", 4) ? UV3_HUB_REVISION_BASE :
161 !strcmp(oem_id, "SGI2") ? UV2_HUB_REVISION_BASE :
162 !strcmp(oem_id, "SGI") ? UV1_HUB_REVISION_BASE : 0;
163
164 if (uv_hub_info->hub_revision == 0)
165 goto badbios;
166
167 pnodeid = early_get_pnodeid();
168 early_get_apic_pnode_shift();
169 x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
170 x86_platform.nmi_init = uv_nmi_init;
171
172 if (!strcmp(oem_table_id, "UVX")) { /* most common */
173 uv_system_type = UV_X2APIC;
174 uv_apic = 0;
175
176 } else if (!strcmp(oem_table_id, "UVH")) { /* only UV1 systems */
177 uv_system_type = UV_NON_UNIQUE_APIC;
178 __this_cpu_write(x2apic_extra_bits,
179 pnodeid << uvh_apicid.s.pnode_shift);
180 uv_set_apicid_hibit();
181 uv_apic = 1;
182
183 } else if (!strcmp(oem_table_id, "UVL")) { /* only used for */
184 uv_system_type = UV_LEGACY_APIC; /* very small systems */
185 uv_apic = 0;
186
187 } else {
188 goto badbios;
189 }
190
191 pr_info("UV: OEM IDs %s/%s, System/HUB Types %d/%d, uv_apic %d\n",
192 oem_id, oem_table_id, uv_system_type,
193 uv_min_hub_revision_id, uv_apic);
194
195 return uv_apic;
196
197 badbios:
198 pr_err("UV: OEM_ID:%s OEM_TABLE_ID:%s\n", oem_id, oem_table_id);
199 pr_err("Current BIOS not supported, update kernel and/or BIOS\n");
200 BUG();
201 }
202
203 enum uv_system_type get_uv_system_type(void)
204 {
205 return uv_system_type;
206 }
207
208 int is_uv_system(void)
209 {
210 return uv_system_type != UV_NONE;
211 }
212 EXPORT_SYMBOL_GPL(is_uv_system);
213
214 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
215 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
216
217 struct uv_blade_info *uv_blade_info;
218 EXPORT_SYMBOL_GPL(uv_blade_info);
219
220 short *uv_node_to_blade;
221 EXPORT_SYMBOL_GPL(uv_node_to_blade);
222
223 short *uv_cpu_to_blade;
224 EXPORT_SYMBOL_GPL(uv_cpu_to_blade);
225
226 short uv_possible_blades;
227 EXPORT_SYMBOL_GPL(uv_possible_blades);
228
229 unsigned long sn_rtc_cycles_per_second;
230 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
231
232 static int uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
233 {
234 unsigned long val;
235 int pnode;
236
237 pnode = uv_apicid_to_pnode(phys_apicid);
238 phys_apicid |= uv_apicid_hibits;
239 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
240 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
241 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
242 APIC_DM_INIT;
243 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
244
245 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
246 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
247 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
248 APIC_DM_STARTUP;
249 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
250
251 return 0;
252 }
253
254 static void uv_send_IPI_one(int cpu, int vector)
255 {
256 unsigned long apicid;
257 int pnode;
258
259 apicid = per_cpu(x86_cpu_to_apicid, cpu);
260 pnode = uv_apicid_to_pnode(apicid);
261 uv_hub_send_ipi(pnode, apicid, vector);
262 }
263
264 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
265 {
266 unsigned int cpu;
267
268 for_each_cpu(cpu, mask)
269 uv_send_IPI_one(cpu, vector);
270 }
271
272 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
273 {
274 unsigned int this_cpu = smp_processor_id();
275 unsigned int cpu;
276
277 for_each_cpu(cpu, mask) {
278 if (cpu != this_cpu)
279 uv_send_IPI_one(cpu, vector);
280 }
281 }
282
283 static void uv_send_IPI_allbutself(int vector)
284 {
285 unsigned int this_cpu = smp_processor_id();
286 unsigned int cpu;
287
288 for_each_online_cpu(cpu) {
289 if (cpu != this_cpu)
290 uv_send_IPI_one(cpu, vector);
291 }
292 }
293
294 static void uv_send_IPI_all(int vector)
295 {
296 uv_send_IPI_mask(cpu_online_mask, vector);
297 }
298
299 static int uv_apic_id_valid(int apicid)
300 {
301 return 1;
302 }
303
304 static int uv_apic_id_registered(void)
305 {
306 return 1;
307 }
308
309 static void uv_init_apic_ldr(void)
310 {
311 }
312
313 static int
314 uv_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
315 const struct cpumask *andmask,
316 unsigned int *apicid)
317 {
318 int unsigned cpu;
319
320 /*
321 * We're using fixed IRQ delivery, can only return one phys APIC ID.
322 * May as well be the first.
323 */
324 for_each_cpu_and(cpu, cpumask, andmask) {
325 if (cpumask_test_cpu(cpu, cpu_online_mask))
326 break;
327 }
328
329 if (likely(cpu < nr_cpu_ids)) {
330 *apicid = per_cpu(x86_cpu_to_apicid, cpu) | uv_apicid_hibits;
331 return 0;
332 }
333
334 return -EINVAL;
335 }
336
337 static unsigned int x2apic_get_apic_id(unsigned long x)
338 {
339 unsigned int id;
340
341 WARN_ON(preemptible() && num_online_cpus() > 1);
342 id = x | __this_cpu_read(x2apic_extra_bits);
343
344 return id;
345 }
346
347 static unsigned long set_apic_id(unsigned int id)
348 {
349 unsigned long x;
350
351 /* maskout x2apic_extra_bits ? */
352 x = id;
353 return x;
354 }
355
356 static unsigned int uv_read_apic_id(void)
357 {
358
359 return x2apic_get_apic_id(apic_read(APIC_ID));
360 }
361
362 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
363 {
364 return uv_read_apic_id() >> index_msb;
365 }
366
367 static void uv_send_IPI_self(int vector)
368 {
369 apic_write(APIC_SELF_IPI, vector);
370 }
371
372 static int uv_probe(void)
373 {
374 return apic == &apic_x2apic_uv_x;
375 }
376
377 static struct apic __refdata apic_x2apic_uv_x = {
378
379 .name = "UV large system",
380 .probe = uv_probe,
381 .acpi_madt_oem_check = uv_acpi_madt_oem_check,
382 .apic_id_valid = uv_apic_id_valid,
383 .apic_id_registered = uv_apic_id_registered,
384
385 .irq_delivery_mode = dest_Fixed,
386 .irq_dest_mode = 0, /* physical */
387
388 .target_cpus = online_target_cpus,
389 .disable_esr = 0,
390 .dest_logical = APIC_DEST_LOGICAL,
391 .check_apicid_used = NULL,
392
393 .vector_allocation_domain = default_vector_allocation_domain,
394 .init_apic_ldr = uv_init_apic_ldr,
395
396 .ioapic_phys_id_map = NULL,
397 .setup_apic_routing = NULL,
398 .cpu_present_to_apicid = default_cpu_present_to_apicid,
399 .apicid_to_cpu_present = NULL,
400 .check_phys_apicid_present = default_check_phys_apicid_present,
401 .phys_pkg_id = uv_phys_pkg_id,
402
403 .get_apic_id = x2apic_get_apic_id,
404 .set_apic_id = set_apic_id,
405 .apic_id_mask = 0xFFFFFFFFu,
406
407 .cpu_mask_to_apicid_and = uv_cpu_mask_to_apicid_and,
408
409 .send_IPI = uv_send_IPI_one,
410 .send_IPI_mask = uv_send_IPI_mask,
411 .send_IPI_mask_allbutself = uv_send_IPI_mask_allbutself,
412 .send_IPI_allbutself = uv_send_IPI_allbutself,
413 .send_IPI_all = uv_send_IPI_all,
414 .send_IPI_self = uv_send_IPI_self,
415
416 .wakeup_secondary_cpu = uv_wakeup_secondary,
417 .inquire_remote_apic = NULL,
418
419 .read = native_apic_msr_read,
420 .write = native_apic_msr_write,
421 .eoi_write = native_apic_msr_eoi_write,
422 .icr_read = native_x2apic_icr_read,
423 .icr_write = native_x2apic_icr_write,
424 .wait_icr_idle = native_x2apic_wait_icr_idle,
425 .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
426 };
427
428 static void set_x2apic_extra_bits(int pnode)
429 {
430 __this_cpu_write(x2apic_extra_bits, pnode << uvh_apicid.s.pnode_shift);
431 }
432
433 /*
434 * Called on boot cpu.
435 */
436 static __init int boot_pnode_to_blade(int pnode)
437 {
438 int blade;
439
440 for (blade = 0; blade < uv_num_possible_blades(); blade++)
441 if (pnode == uv_blade_info[blade].pnode)
442 return blade;
443 BUG();
444 }
445
446 struct redir_addr {
447 unsigned long redirect;
448 unsigned long alias;
449 };
450
451 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
452
453 static __initdata struct redir_addr redir_addrs[] = {
454 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_0_MMR},
455 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_1_MMR},
456 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_2_MMR},
457 };
458
459 static unsigned char get_n_lshift(int m_val)
460 {
461 union uv3h_gr0_gam_gr_config_u m_gr_config;
462
463 if (is_uv1_hub())
464 return m_val;
465
466 if (is_uv2_hub())
467 return m_val == 40 ? 40 : 39;
468
469 m_gr_config.v = uv_read_local_mmr(UV3H_GR0_GAM_GR_CONFIG);
470 return m_gr_config.s3.m_skt;
471 }
472
473 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
474 {
475 union uvh_rh_gam_alias210_overlay_config_2_mmr_u alias;
476 union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
477 int i;
478
479 for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
480 alias.v = uv_read_local_mmr(redir_addrs[i].alias);
481 if (alias.s.enable && alias.s.base == 0) {
482 *size = (1UL << alias.s.m_alias);
483 redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
484 *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
485 return;
486 }
487 }
488 *base = *size = 0;
489 }
490
491 enum map_type {map_wb, map_uc};
492
493 static __init void map_high(char *id, unsigned long base, int pshift,
494 int bshift, int max_pnode, enum map_type map_type)
495 {
496 unsigned long bytes, paddr;
497
498 paddr = base << pshift;
499 bytes = (1UL << bshift) * (max_pnode + 1);
500 if (!paddr) {
501 pr_info("UV: Map %s_HI base address NULL\n", id);
502 return;
503 }
504 pr_debug("UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr, paddr + bytes);
505 if (map_type == map_uc)
506 init_extra_mapping_uc(paddr, bytes);
507 else
508 init_extra_mapping_wb(paddr, bytes);
509 }
510
511 static __init void map_gru_distributed(unsigned long c)
512 {
513 union uvh_rh_gam_gru_overlay_config_mmr_u gru;
514 u64 paddr;
515 unsigned long bytes;
516 int nid;
517
518 gru.v = c;
519 /* only base bits 42:28 relevant in dist mode */
520 gru_dist_base = gru.v & 0x000007fff0000000UL;
521 if (!gru_dist_base) {
522 pr_info("UV: Map GRU_DIST base address NULL\n");
523 return;
524 }
525 bytes = 1UL << UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
526 gru_dist_lmask = ((1UL << uv_hub_info->m_val) - 1) & ~(bytes - 1);
527 gru_dist_umask = ~((1UL << uv_hub_info->m_val) - 1);
528 gru_dist_base &= gru_dist_lmask; /* Clear bits above M */
529 for_each_online_node(nid) {
530 paddr = ((u64)uv_node_to_pnode(nid) << uv_hub_info->m_val) |
531 gru_dist_base;
532 init_extra_mapping_wb(paddr, bytes);
533 gru_first_node_paddr = min(paddr, gru_first_node_paddr);
534 gru_last_node_paddr = max(paddr, gru_last_node_paddr);
535 }
536 /* Save upper (63:M) bits of address only for is_GRU_range */
537 gru_first_node_paddr &= gru_dist_umask;
538 gru_last_node_paddr &= gru_dist_umask;
539 pr_debug("UV: Map GRU_DIST base 0x%016llx 0x%016llx - 0x%016llx\n",
540 gru_dist_base, gru_first_node_paddr, gru_last_node_paddr);
541 }
542
543 static __init void map_gru_high(int max_pnode)
544 {
545 union uvh_rh_gam_gru_overlay_config_mmr_u gru;
546 int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
547
548 gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
549 if (!gru.s.enable) {
550 pr_info("UV: GRU disabled\n");
551 return;
552 }
553
554 if (is_uv3_hub() && gru.s3.mode) {
555 map_gru_distributed(gru.v);
556 return;
557 }
558 map_high("GRU", gru.s.base, shift, shift, max_pnode, map_wb);
559 gru_start_paddr = ((u64)gru.s.base << shift);
560 gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
561 }
562
563 static __init void map_mmr_high(int max_pnode)
564 {
565 union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
566 int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
567
568 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
569 if (mmr.s.enable)
570 map_high("MMR", mmr.s.base, shift, shift, max_pnode, map_uc);
571 else
572 pr_info("UV: MMR disabled\n");
573 }
574
575 /*
576 * This commonality works because both 0 & 1 versions of the MMIOH OVERLAY
577 * and REDIRECT MMR regs are exactly the same on UV3.
578 */
579 struct mmioh_config {
580 unsigned long overlay;
581 unsigned long redirect;
582 char *id;
583 };
584
585 static __initdata struct mmioh_config mmiohs[] = {
586 {
587 UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR,
588 UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR,
589 "MMIOH0"
590 },
591 {
592 UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR,
593 UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG1_MMR,
594 "MMIOH1"
595 },
596 };
597
598 static __init void map_mmioh_high_uv3(int index, int min_pnode, int max_pnode)
599 {
600 union uv3h_rh_gam_mmioh_overlay_config0_mmr_u overlay;
601 unsigned long mmr;
602 unsigned long base;
603 int i, n, shift, m_io, max_io;
604 int nasid, lnasid, fi, li;
605 char *id;
606
607 id = mmiohs[index].id;
608 overlay.v = uv_read_local_mmr(mmiohs[index].overlay);
609 pr_info("UV: %s overlay 0x%lx base:0x%x m_io:%d\n",
610 id, overlay.v, overlay.s3.base, overlay.s3.m_io);
611 if (!overlay.s3.enable) {
612 pr_info("UV: %s disabled\n", id);
613 return;
614 }
615
616 shift = UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_BASE_SHFT;
617 base = (unsigned long)overlay.s3.base;
618 m_io = overlay.s3.m_io;
619 mmr = mmiohs[index].redirect;
620 n = UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR_DEPTH;
621 min_pnode *= 2; /* convert to NASID */
622 max_pnode *= 2;
623 max_io = lnasid = fi = li = -1;
624
625 for (i = 0; i < n; i++) {
626 union uv3h_rh_gam_mmioh_redirect_config0_mmr_u redirect;
627
628 redirect.v = uv_read_local_mmr(mmr + i * 8);
629 nasid = redirect.s3.nasid;
630 if (nasid < min_pnode || max_pnode < nasid)
631 nasid = -1; /* invalid NASID */
632
633 if (nasid == lnasid) {
634 li = i;
635 if (i != n-1) /* last entry check */
636 continue;
637 }
638
639 /* check if we have a cached (or last) redirect to print */
640 if (lnasid != -1 || (i == n-1 && nasid != -1)) {
641 unsigned long addr1, addr2;
642 int f, l;
643
644 if (lnasid == -1) {
645 f = l = i;
646 lnasid = nasid;
647 } else {
648 f = fi;
649 l = li;
650 }
651 addr1 = (base << shift) +
652 f * (unsigned long)(1 << m_io);
653 addr2 = (base << shift) +
654 (l + 1) * (unsigned long)(1 << m_io);
655 pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n",
656 id, fi, li, lnasid, addr1, addr2);
657 if (max_io < l)
658 max_io = l;
659 }
660 fi = li = i;
661 lnasid = nasid;
662 }
663
664 pr_info("UV: %s base:0x%lx shift:%d M_IO:%d MAX_IO:%d\n",
665 id, base, shift, m_io, max_io);
666
667 if (max_io >= 0)
668 map_high(id, base, shift, m_io, max_io, map_uc);
669 }
670
671 static __init void map_mmioh_high(int min_pnode, int max_pnode)
672 {
673 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
674 unsigned long mmr, base;
675 int shift, enable, m_io, n_io;
676
677 if (is_uv3_hub()) {
678 /* Map both MMIOH Regions */
679 map_mmioh_high_uv3(0, min_pnode, max_pnode);
680 map_mmioh_high_uv3(1, min_pnode, max_pnode);
681 return;
682 }
683
684 if (is_uv1_hub()) {
685 mmr = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
686 shift = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
687 mmioh.v = uv_read_local_mmr(mmr);
688 enable = !!mmioh.s1.enable;
689 base = mmioh.s1.base;
690 m_io = mmioh.s1.m_io;
691 n_io = mmioh.s1.n_io;
692 } else if (is_uv2_hub()) {
693 mmr = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
694 shift = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
695 mmioh.v = uv_read_local_mmr(mmr);
696 enable = !!mmioh.s2.enable;
697 base = mmioh.s2.base;
698 m_io = mmioh.s2.m_io;
699 n_io = mmioh.s2.n_io;
700 } else
701 return;
702
703 if (enable) {
704 max_pnode &= (1 << n_io) - 1;
705 pr_info(
706 "UV: base:0x%lx shift:%d N_IO:%d M_IO:%d max_pnode:0x%x\n",
707 base, shift, m_io, n_io, max_pnode);
708 map_high("MMIOH", base, shift, m_io, max_pnode, map_uc);
709 } else {
710 pr_info("UV: MMIOH disabled\n");
711 }
712 }
713
714 static __init void map_low_mmrs(void)
715 {
716 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
717 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
718 }
719
720 static __init void uv_rtc_init(void)
721 {
722 long status;
723 u64 ticks_per_sec;
724
725 status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK,
726 &ticks_per_sec);
727 if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
728 printk(KERN_WARNING
729 "unable to determine platform RTC clock frequency, "
730 "guessing.\n");
731 /* BIOS gives wrong value for clock freq. so guess */
732 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
733 } else
734 sn_rtc_cycles_per_second = ticks_per_sec;
735 }
736
737 /*
738 * percpu heartbeat timer
739 */
740 static void uv_heartbeat(unsigned long ignored)
741 {
742 struct timer_list *timer = &uv_hub_info->scir.timer;
743 unsigned char bits = uv_hub_info->scir.state;
744
745 /* flip heartbeat bit */
746 bits ^= SCIR_CPU_HEARTBEAT;
747
748 /* is this cpu idle? */
749 if (idle_cpu(raw_smp_processor_id()))
750 bits &= ~SCIR_CPU_ACTIVITY;
751 else
752 bits |= SCIR_CPU_ACTIVITY;
753
754 /* update system controller interface reg */
755 uv_set_scir_bits(bits);
756
757 /* enable next timer period */
758 mod_timer_pinned(timer, jiffies + SCIR_CPU_HB_INTERVAL);
759 }
760
761 static void uv_heartbeat_enable(int cpu)
762 {
763 while (!uv_cpu_hub_info(cpu)->scir.enabled) {
764 struct timer_list *timer = &uv_cpu_hub_info(cpu)->scir.timer;
765
766 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
767 setup_timer(timer, uv_heartbeat, cpu);
768 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
769 add_timer_on(timer, cpu);
770 uv_cpu_hub_info(cpu)->scir.enabled = 1;
771
772 /* also ensure that boot cpu is enabled */
773 cpu = 0;
774 }
775 }
776
777 #ifdef CONFIG_HOTPLUG_CPU
778 static void uv_heartbeat_disable(int cpu)
779 {
780 if (uv_cpu_hub_info(cpu)->scir.enabled) {
781 uv_cpu_hub_info(cpu)->scir.enabled = 0;
782 del_timer(&uv_cpu_hub_info(cpu)->scir.timer);
783 }
784 uv_set_cpu_scir_bits(cpu, 0xff);
785 }
786
787 /*
788 * cpu hotplug notifier
789 */
790 static int uv_scir_cpu_notify(struct notifier_block *self, unsigned long action,
791 void *hcpu)
792 {
793 long cpu = (long)hcpu;
794
795 switch (action & ~CPU_TASKS_FROZEN) {
796 case CPU_DOWN_FAILED:
797 case CPU_ONLINE:
798 uv_heartbeat_enable(cpu);
799 break;
800 case CPU_DOWN_PREPARE:
801 uv_heartbeat_disable(cpu);
802 break;
803 default:
804 break;
805 }
806 return NOTIFY_OK;
807 }
808
809 static __init void uv_scir_register_cpu_notifier(void)
810 {
811 hotcpu_notifier(uv_scir_cpu_notify, 0);
812 }
813
814 #else /* !CONFIG_HOTPLUG_CPU */
815
816 static __init void uv_scir_register_cpu_notifier(void)
817 {
818 }
819
820 static __init int uv_init_heartbeat(void)
821 {
822 int cpu;
823
824 if (is_uv_system())
825 for_each_online_cpu(cpu)
826 uv_heartbeat_enable(cpu);
827 return 0;
828 }
829
830 late_initcall(uv_init_heartbeat);
831
832 #endif /* !CONFIG_HOTPLUG_CPU */
833
834 /* Direct Legacy VGA I/O traffic to designated IOH */
835 int uv_set_vga_state(struct pci_dev *pdev, bool decode,
836 unsigned int command_bits, u32 flags)
837 {
838 int domain, bus, rc;
839
840 PR_DEVEL("devfn %x decode %d cmd %x flags %d\n",
841 pdev->devfn, decode, command_bits, flags);
842
843 if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE))
844 return 0;
845
846 if ((command_bits & PCI_COMMAND_IO) == 0)
847 return 0;
848
849 domain = pci_domain_nr(pdev->bus);
850 bus = pdev->bus->number;
851
852 rc = uv_bios_set_legacy_vga_target(decode, domain, bus);
853 PR_DEVEL("vga decode %d %x:%x, rc: %d\n", decode, domain, bus, rc);
854
855 return rc;
856 }
857
858 /*
859 * Called on each cpu to initialize the per_cpu UV data area.
860 * FIXME: hotplug not supported yet
861 */
862 void uv_cpu_init(void)
863 {
864 /* CPU 0 initialization will be done via uv_system_init. */
865 if (!uv_blade_info)
866 return;
867
868 uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
869
870 if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
871 set_x2apic_extra_bits(uv_hub_info->pnode);
872 }
873
874 void __init uv_system_init(void)
875 {
876 union uvh_rh_gam_config_mmr_u m_n_config;
877 union uvh_node_id_u node_id;
878 unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
879 int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
880 int gnode_extra, min_pnode = 999999, max_pnode = -1;
881 unsigned long mmr_base, present, paddr;
882 unsigned short pnode_mask;
883 unsigned char n_lshift;
884 char *hub = (is_uv1_hub() ? "UV100/1000" :
885 (is_uv2_hub() ? "UV2000/3000" :
886 (is_uv3_hub() ? "UV300" : NULL)));
887
888 if (!hub) {
889 pr_err("UV: Unknown/unsupported UV hub\n");
890 return;
891 }
892 pr_info("UV: Found %s hub\n", hub);
893
894 map_low_mmrs();
895
896 m_n_config.v = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR );
897 m_val = m_n_config.s.m_skt;
898 n_val = m_n_config.s.n_skt;
899 pnode_mask = (1 << n_val) - 1;
900 n_lshift = get_n_lshift(m_val);
901 mmr_base =
902 uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
903 ~UV_MMR_ENABLE;
904
905 node_id.v = uv_read_local_mmr(UVH_NODE_ID);
906 gnode_extra = (node_id.s.node_id & ~((1 << n_val) - 1)) >> 1;
907 gnode_upper = ((unsigned long)gnode_extra << m_val);
908 pr_info("UV: N:%d M:%d pnode_mask:0x%x gnode_upper/extra:0x%lx/0x%x n_lshift 0x%x\n",
909 n_val, m_val, pnode_mask, gnode_upper, gnode_extra,
910 n_lshift);
911
912 pr_info("UV: global MMR base 0x%lx\n", mmr_base);
913
914 for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
915 uv_possible_blades +=
916 hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
917
918 /* uv_num_possible_blades() is really the hub count */
919 pr_info("UV: Found %d blades, %d hubs\n",
920 is_uv1_hub() ? uv_num_possible_blades() :
921 (uv_num_possible_blades() + 1) / 2,
922 uv_num_possible_blades());
923
924 bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
925 uv_blade_info = kzalloc(bytes, GFP_KERNEL);
926 BUG_ON(!uv_blade_info);
927
928 for (blade = 0; blade < uv_num_possible_blades(); blade++)
929 uv_blade_info[blade].memory_nid = -1;
930
931 get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
932
933 bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
934 uv_node_to_blade = kmalloc(bytes, GFP_KERNEL);
935 BUG_ON(!uv_node_to_blade);
936 memset(uv_node_to_blade, 255, bytes);
937
938 bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
939 uv_cpu_to_blade = kmalloc(bytes, GFP_KERNEL);
940 BUG_ON(!uv_cpu_to_blade);
941 memset(uv_cpu_to_blade, 255, bytes);
942
943 blade = 0;
944 for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
945 present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
946 for (j = 0; j < 64; j++) {
947 if (!test_bit(j, &present))
948 continue;
949 pnode = (i * 64 + j) & pnode_mask;
950 uv_blade_info[blade].pnode = pnode;
951 uv_blade_info[blade].nr_possible_cpus = 0;
952 uv_blade_info[blade].nr_online_cpus = 0;
953 spin_lock_init(&uv_blade_info[blade].nmi_lock);
954 min_pnode = min(pnode, min_pnode);
955 max_pnode = max(pnode, max_pnode);
956 blade++;
957 }
958 }
959
960 uv_bios_init();
961 uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id,
962 &sn_region_size, &system_serial_number);
963 uv_rtc_init();
964
965 for_each_present_cpu(cpu) {
966 int apicid = per_cpu(x86_cpu_to_apicid, cpu);
967
968 nid = cpu_to_node(cpu);
969 /*
970 * apic_pnode_shift must be set before calling uv_apicid_to_pnode();
971 */
972 uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
973 uv_cpu_hub_info(cpu)->apic_pnode_shift = uvh_apicid.s.pnode_shift;
974 uv_cpu_hub_info(cpu)->hub_revision = uv_hub_info->hub_revision;
975
976 uv_cpu_hub_info(cpu)->m_shift = 64 - m_val;
977 uv_cpu_hub_info(cpu)->n_lshift = n_lshift;
978
979 pnode = uv_apicid_to_pnode(apicid);
980 blade = boot_pnode_to_blade(pnode);
981 lcpu = uv_blade_info[blade].nr_possible_cpus;
982 uv_blade_info[blade].nr_possible_cpus++;
983
984 /* Any node on the blade, else will contain -1. */
985 uv_blade_info[blade].memory_nid = nid;
986
987 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
988 uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
989 uv_cpu_hub_info(cpu)->m_val = m_val;
990 uv_cpu_hub_info(cpu)->n_val = n_val;
991 uv_cpu_hub_info(cpu)->numa_blade_id = blade;
992 uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
993 uv_cpu_hub_info(cpu)->pnode = pnode;
994 uv_cpu_hub_info(cpu)->gpa_mask = (1UL << (m_val + n_val)) - 1;
995 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
996 uv_cpu_hub_info(cpu)->gnode_extra = gnode_extra;
997 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
998 uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
999 uv_cpu_hub_info(cpu)->scir.offset = uv_scir_offset(apicid);
1000 uv_node_to_blade[nid] = blade;
1001 uv_cpu_to_blade[cpu] = blade;
1002 }
1003
1004 /* Add blade/pnode info for nodes without cpus */
1005 for_each_online_node(nid) {
1006 if (uv_node_to_blade[nid] >= 0)
1007 continue;
1008 paddr = node_start_pfn(nid) << PAGE_SHIFT;
1009 pnode = uv_gpa_to_pnode(uv_soc_phys_ram_to_gpa(paddr));
1010 blade = boot_pnode_to_blade(pnode);
1011 uv_node_to_blade[nid] = blade;
1012 }
1013
1014 map_gru_high(max_pnode);
1015 map_mmr_high(max_pnode);
1016 map_mmioh_high(min_pnode, max_pnode);
1017
1018 uv_nmi_setup();
1019 uv_cpu_init();
1020 uv_scir_register_cpu_notifier();
1021 proc_mkdir("sgi_uv", NULL);
1022
1023 /* register Legacy VGA I/O redirection handler */
1024 pci_register_set_vga_state(uv_set_vga_state);
1025
1026 /*
1027 * For a kdump kernel the reset must be BOOT_ACPI, not BOOT_EFI, as
1028 * EFI is not enabled in the kdump kernel.
1029 */
1030 if (is_kdump_kernel())
1031 reboot_type = BOOT_ACPI;
1032 }
1033
1034 apic_driver(apic_x2apic_uv_x);
Linux kernel - Deliverables
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