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vfs: remove unused wrapper block_page_mkwrite()
[linux/fpc-iii.git] / arch / x86 / kernel / apic / x2apic_uv_x.c
blob4a139465f1d4f025366af706b410594dc43d65b1
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_mask = uv_send_IPI_mask,
410 .send_IPI_mask_allbutself = uv_send_IPI_mask_allbutself,
411 .send_IPI_allbutself = uv_send_IPI_allbutself,
412 .send_IPI_all = uv_send_IPI_all,
413 .send_IPI_self = uv_send_IPI_self,
414
415 .wakeup_secondary_cpu = uv_wakeup_secondary,
416 .inquire_remote_apic = NULL,
417
418 .read = native_apic_msr_read,
419 .write = native_apic_msr_write,
420 .eoi_write = native_apic_msr_eoi_write,
421 .icr_read = native_x2apic_icr_read,
422 .icr_write = native_x2apic_icr_write,
423 .wait_icr_idle = native_x2apic_wait_icr_idle,
424 .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
425 };
426
427 static void set_x2apic_extra_bits(int pnode)
428 {
429 __this_cpu_write(x2apic_extra_bits, pnode << uvh_apicid.s.pnode_shift);
430 }
431
432 /*
433 * Called on boot cpu.
434 */
435 static __init int boot_pnode_to_blade(int pnode)
436 {
437 int blade;
438
439 for (blade = 0; blade < uv_num_possible_blades(); blade++)
440 if (pnode == uv_blade_info[blade].pnode)
441 return blade;
442 BUG();
443 }
444
445 struct redir_addr {
446 unsigned long redirect;
447 unsigned long alias;
448 };
449
450 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
451
452 static __initdata struct redir_addr redir_addrs[] = {
453 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_0_MMR},
454 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_1_MMR},
455 {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_2_MMR},
456 };
457
458 static unsigned char get_n_lshift(int m_val)
459 {
460 union uv3h_gr0_gam_gr_config_u m_gr_config;
461
462 if (is_uv1_hub())
463 return m_val;
464
465 if (is_uv2_hub())
466 return m_val == 40 ? 40 : 39;
467
468 m_gr_config.v = uv_read_local_mmr(UV3H_GR0_GAM_GR_CONFIG);
469 return m_gr_config.s3.m_skt;
470 }
471
472 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
473 {
474 union uvh_rh_gam_alias210_overlay_config_2_mmr_u alias;
475 union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
476 int i;
477
478 for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
479 alias.v = uv_read_local_mmr(redir_addrs[i].alias);
480 if (alias.s.enable && alias.s.base == 0) {
481 *size = (1UL << alias.s.m_alias);
482 redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
483 *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
484 return;
485 }
486 }
487 *base = *size = 0;
488 }
489
490 enum map_type {map_wb, map_uc};
491
492 static __init void map_high(char *id, unsigned long base, int pshift,
493 int bshift, int max_pnode, enum map_type map_type)
494 {
495 unsigned long bytes, paddr;
496
497 paddr = base << pshift;
498 bytes = (1UL << bshift) * (max_pnode + 1);
499 if (!paddr) {
500 pr_info("UV: Map %s_HI base address NULL\n", id);
501 return;
502 }
503 pr_debug("UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr, paddr + bytes);
504 if (map_type == map_uc)
505 init_extra_mapping_uc(paddr, bytes);
506 else
507 init_extra_mapping_wb(paddr, bytes);
508 }
509
510 static __init void map_gru_distributed(unsigned long c)
511 {
512 union uvh_rh_gam_gru_overlay_config_mmr_u gru;
513 u64 paddr;
514 unsigned long bytes;
515 int nid;
516
517 gru.v = c;
518 /* only base bits 42:28 relevant in dist mode */
519 gru_dist_base = gru.v & 0x000007fff0000000UL;
520 if (!gru_dist_base) {
521 pr_info("UV: Map GRU_DIST base address NULL\n");
522 return;
523 }
524 bytes = 1UL << UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
525 gru_dist_lmask = ((1UL << uv_hub_info->m_val) - 1) & ~(bytes - 1);
526 gru_dist_umask = ~((1UL << uv_hub_info->m_val) - 1);
527 gru_dist_base &= gru_dist_lmask; /* Clear bits above M */
528 for_each_online_node(nid) {
529 paddr = ((u64)uv_node_to_pnode(nid) << uv_hub_info->m_val) |
530 gru_dist_base;
531 init_extra_mapping_wb(paddr, bytes);
532 gru_first_node_paddr = min(paddr, gru_first_node_paddr);
533 gru_last_node_paddr = max(paddr, gru_last_node_paddr);
534 }
535 /* Save upper (63:M) bits of address only for is_GRU_range */
536 gru_first_node_paddr &= gru_dist_umask;
537 gru_last_node_paddr &= gru_dist_umask;
538 pr_debug("UV: Map GRU_DIST base 0x%016llx 0x%016llx - 0x%016llx\n",
539 gru_dist_base, gru_first_node_paddr, gru_last_node_paddr);
540 }
541
542 static __init void map_gru_high(int max_pnode)
543 {
544 union uvh_rh_gam_gru_overlay_config_mmr_u gru;
545 int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
546
547 gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
548 if (!gru.s.enable) {
549 pr_info("UV: GRU disabled\n");
550 return;
551 }
552
553 if (is_uv3_hub() && gru.s3.mode) {
554 map_gru_distributed(gru.v);
555 return;
556 }
557 map_high("GRU", gru.s.base, shift, shift, max_pnode, map_wb);
558 gru_start_paddr = ((u64)gru.s.base << shift);
559 gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
560 }
561
562 static __init void map_mmr_high(int max_pnode)
563 {
564 union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
565 int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
566
567 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
568 if (mmr.s.enable)
569 map_high("MMR", mmr.s.base, shift, shift, max_pnode, map_uc);
570 else
571 pr_info("UV: MMR disabled\n");
572 }
573
574 /*
575 * This commonality works because both 0 & 1 versions of the MMIOH OVERLAY
576 * and REDIRECT MMR regs are exactly the same on UV3.
577 */
578 struct mmioh_config {
579 unsigned long overlay;
580 unsigned long redirect;
581 char *id;
582 };
583
584 static __initdata struct mmioh_config mmiohs[] = {
585 {
586 UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR,
587 UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR,
588 "MMIOH0"
589 },
590 {
591 UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR,
592 UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG1_MMR,
593 "MMIOH1"
594 },
595 };
596
597 static __init void map_mmioh_high_uv3(int index, int min_pnode, int max_pnode)
598 {
599 union uv3h_rh_gam_mmioh_overlay_config0_mmr_u overlay;
600 unsigned long mmr;
601 unsigned long base;
602 int i, n, shift, m_io, max_io;
603 int nasid, lnasid, fi, li;
604 char *id;
605
606 id = mmiohs[index].id;
607 overlay.v = uv_read_local_mmr(mmiohs[index].overlay);
608 pr_info("UV: %s overlay 0x%lx base:0x%x m_io:%d\n",
609 id, overlay.v, overlay.s3.base, overlay.s3.m_io);
610 if (!overlay.s3.enable) {
611 pr_info("UV: %s disabled\n", id);
612 return;
613 }
614
615 shift = UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_BASE_SHFT;
616 base = (unsigned long)overlay.s3.base;
617 m_io = overlay.s3.m_io;
618 mmr = mmiohs[index].redirect;
619 n = UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR_DEPTH;
620 min_pnode *= 2; /* convert to NASID */
621 max_pnode *= 2;
622 max_io = lnasid = fi = li = -1;
623
624 for (i = 0; i < n; i++) {
625 union uv3h_rh_gam_mmioh_redirect_config0_mmr_u redirect;
626
627 redirect.v = uv_read_local_mmr(mmr + i * 8);
628 nasid = redirect.s3.nasid;
629 if (nasid < min_pnode || max_pnode < nasid)
630 nasid = -1; /* invalid NASID */
631
632 if (nasid == lnasid) {
633 li = i;
634 if (i != n-1) /* last entry check */
635 continue;
636 }
637
638 /* check if we have a cached (or last) redirect to print */
639 if (lnasid != -1 || (i == n-1 && nasid != -1)) {
640 unsigned long addr1, addr2;
641 int f, l;
642
643 if (lnasid == -1) {
644 f = l = i;
645 lnasid = nasid;
646 } else {
647 f = fi;
648 l = li;
649 }
650 addr1 = (base << shift) +
651 f * (unsigned long)(1 << m_io);
652 addr2 = (base << shift) +
653 (l + 1) * (unsigned long)(1 << m_io);
654 pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n",
655 id, fi, li, lnasid, addr1, addr2);
656 if (max_io < l)
657 max_io = l;
658 }
659 fi = li = i;
660 lnasid = nasid;
661 }
662
663 pr_info("UV: %s base:0x%lx shift:%d M_IO:%d MAX_IO:%d\n",
664 id, base, shift, m_io, max_io);
665
666 if (max_io >= 0)
667 map_high(id, base, shift, m_io, max_io, map_uc);
668 }
669
670 static __init void map_mmioh_high(int min_pnode, int max_pnode)
671 {
672 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
673 unsigned long mmr, base;
674 int shift, enable, m_io, n_io;
675
676 if (is_uv3_hub()) {
677 /* Map both MMIOH Regions */
678 map_mmioh_high_uv3(0, min_pnode, max_pnode);
679 map_mmioh_high_uv3(1, min_pnode, max_pnode);
680 return;
681 }
682
683 if (is_uv1_hub()) {
684 mmr = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
685 shift = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
686 mmioh.v = uv_read_local_mmr(mmr);
687 enable = !!mmioh.s1.enable;
688 base = mmioh.s1.base;
689 m_io = mmioh.s1.m_io;
690 n_io = mmioh.s1.n_io;
691 } else if (is_uv2_hub()) {
692 mmr = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
693 shift = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
694 mmioh.v = uv_read_local_mmr(mmr);
695 enable = !!mmioh.s2.enable;
696 base = mmioh.s2.base;
697 m_io = mmioh.s2.m_io;
698 n_io = mmioh.s2.n_io;
699 } else
700 return;
701
702 if (enable) {
703 max_pnode &= (1 << n_io) - 1;
704 pr_info(
705 "UV: base:0x%lx shift:%d N_IO:%d M_IO:%d max_pnode:0x%x\n",
706 base, shift, m_io, n_io, max_pnode);
707 map_high("MMIOH", base, shift, m_io, max_pnode, map_uc);
708 } else {
709 pr_info("UV: MMIOH disabled\n");
710 }
711 }
712
713 static __init void map_low_mmrs(void)
714 {
715 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
716 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
717 }
718
719 static __init void uv_rtc_init(void)
720 {
721 long status;
722 u64 ticks_per_sec;
723
724 status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK,
725 &ticks_per_sec);
726 if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
727 printk(KERN_WARNING
728 "unable to determine platform RTC clock frequency, "
729 "guessing.\n");
730 /* BIOS gives wrong value for clock freq. so guess */
731 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
732 } else
733 sn_rtc_cycles_per_second = ticks_per_sec;
734 }
735
736 /*
737 * percpu heartbeat timer
738 */
739 static void uv_heartbeat(unsigned long ignored)
740 {
741 struct timer_list *timer = &uv_hub_info->scir.timer;
742 unsigned char bits = uv_hub_info->scir.state;
743
744 /* flip heartbeat bit */
745 bits ^= SCIR_CPU_HEARTBEAT;
746
747 /* is this cpu idle? */
748 if (idle_cpu(raw_smp_processor_id()))
749 bits &= ~SCIR_CPU_ACTIVITY;
750 else
751 bits |= SCIR_CPU_ACTIVITY;
752
753 /* update system controller interface reg */
754 uv_set_scir_bits(bits);
755
756 /* enable next timer period */
757 mod_timer_pinned(timer, jiffies + SCIR_CPU_HB_INTERVAL);
758 }
759
760 static void uv_heartbeat_enable(int cpu)
761 {
762 while (!uv_cpu_hub_info(cpu)->scir.enabled) {
763 struct timer_list *timer = &uv_cpu_hub_info(cpu)->scir.timer;
764
765 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
766 setup_timer(timer, uv_heartbeat, cpu);
767 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
768 add_timer_on(timer, cpu);
769 uv_cpu_hub_info(cpu)->scir.enabled = 1;
770
771 /* also ensure that boot cpu is enabled */
772 cpu = 0;
773 }
774 }
775
776 #ifdef CONFIG_HOTPLUG_CPU
777 static void uv_heartbeat_disable(int cpu)
778 {
779 if (uv_cpu_hub_info(cpu)->scir.enabled) {
780 uv_cpu_hub_info(cpu)->scir.enabled = 0;
781 del_timer(&uv_cpu_hub_info(cpu)->scir.timer);
782 }
783 uv_set_cpu_scir_bits(cpu, 0xff);
784 }
785
786 /*
787 * cpu hotplug notifier
788 */
789 static int uv_scir_cpu_notify(struct notifier_block *self, unsigned long action,
790 void *hcpu)
791 {
792 long cpu = (long)hcpu;
793
794 switch (action) {
795 case CPU_ONLINE:
796 uv_heartbeat_enable(cpu);
797 break;
798 case CPU_DOWN_PREPARE:
799 uv_heartbeat_disable(cpu);
800 break;
801 default:
802 break;
803 }
804 return NOTIFY_OK;
805 }
806
807 static __init void uv_scir_register_cpu_notifier(void)
808 {
809 hotcpu_notifier(uv_scir_cpu_notify, 0);
810 }
811
812 #else /* !CONFIG_HOTPLUG_CPU */
813
814 static __init void uv_scir_register_cpu_notifier(void)
815 {
816 }
817
818 static __init int uv_init_heartbeat(void)
819 {
820 int cpu;
821
822 if (is_uv_system())
823 for_each_online_cpu(cpu)
824 uv_heartbeat_enable(cpu);
825 return 0;
826 }
827
828 late_initcall(uv_init_heartbeat);
829
830 #endif /* !CONFIG_HOTPLUG_CPU */
831
832 /* Direct Legacy VGA I/O traffic to designated IOH */
833 int uv_set_vga_state(struct pci_dev *pdev, bool decode,
834 unsigned int command_bits, u32 flags)
835 {
836 int domain, bus, rc;
837
838 PR_DEVEL("devfn %x decode %d cmd %x flags %d\n",
839 pdev->devfn, decode, command_bits, flags);
840
841 if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE))
842 return 0;
843
844 if ((command_bits & PCI_COMMAND_IO) == 0)
845 return 0;
846
847 domain = pci_domain_nr(pdev->bus);
848 bus = pdev->bus->number;
849
850 rc = uv_bios_set_legacy_vga_target(decode, domain, bus);
851 PR_DEVEL("vga decode %d %x:%x, rc: %d\n", decode, domain, bus, rc);
852
853 return rc;
854 }
855
856 /*
857 * Called on each cpu to initialize the per_cpu UV data area.
858 * FIXME: hotplug not supported yet
859 */
860 void uv_cpu_init(void)
861 {
862 /* CPU 0 initilization will be done via uv_system_init. */
863 if (!uv_blade_info)
864 return;
865
866 uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
867
868 if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
869 set_x2apic_extra_bits(uv_hub_info->pnode);
870 }
871
872 void __init uv_system_init(void)
873 {
874 union uvh_rh_gam_config_mmr_u m_n_config;
875 union uvh_node_id_u node_id;
876 unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
877 int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
878 int gnode_extra, min_pnode = 999999, max_pnode = -1;
879 unsigned long mmr_base, present, paddr;
880 unsigned short pnode_mask;
881 unsigned char n_lshift;
882 char *hub = (is_uv1_hub() ? "UV100/1000" :
883 (is_uv2_hub() ? "UV2000/3000" :
884 (is_uv3_hub() ? "UV300" : NULL)));
885
886 if (!hub) {
887 pr_err("UV: Unknown/unsupported UV hub\n");
888 return;
889 }
890 pr_info("UV: Found %s hub\n", hub);
891 map_low_mmrs();
892
893 m_n_config.v = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR );
894 m_val = m_n_config.s.m_skt;
895 n_val = m_n_config.s.n_skt;
896 pnode_mask = (1 << n_val) - 1;
897 n_lshift = get_n_lshift(m_val);
898 mmr_base =
899 uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
900 ~UV_MMR_ENABLE;
901
902 node_id.v = uv_read_local_mmr(UVH_NODE_ID);
903 gnode_extra = (node_id.s.node_id & ~((1 << n_val) - 1)) >> 1;
904 gnode_upper = ((unsigned long)gnode_extra << m_val);
905 pr_info("UV: N:%d M:%d pnode_mask:0x%x gnode_upper/extra:0x%lx/0x%x n_lshift 0x%x\n",
906 n_val, m_val, pnode_mask, gnode_upper, gnode_extra,
907 n_lshift);
908
909 pr_info("UV: global MMR base 0x%lx\n", mmr_base);
910
911 for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
912 uv_possible_blades +=
913 hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
914
915 /* uv_num_possible_blades() is really the hub count */
916 pr_info("UV: Found %d blades, %d hubs\n",
917 is_uv1_hub() ? uv_num_possible_blades() :
918 (uv_num_possible_blades() + 1) / 2,
919 uv_num_possible_blades());
920
921 bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
922 uv_blade_info = kzalloc(bytes, GFP_KERNEL);
923 BUG_ON(!uv_blade_info);
924
925 for (blade = 0; blade < uv_num_possible_blades(); blade++)
926 uv_blade_info[blade].memory_nid = -1;
927
928 get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
929
930 bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
931 uv_node_to_blade = kmalloc(bytes, GFP_KERNEL);
932 BUG_ON(!uv_node_to_blade);
933 memset(uv_node_to_blade, 255, bytes);
934
935 bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
936 uv_cpu_to_blade = kmalloc(bytes, GFP_KERNEL);
937 BUG_ON(!uv_cpu_to_blade);
938 memset(uv_cpu_to_blade, 255, bytes);
939
940 blade = 0;
941 for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
942 present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
943 for (j = 0; j < 64; j++) {
944 if (!test_bit(j, &present))
945 continue;
946 pnode = (i * 64 + j) & pnode_mask;
947 uv_blade_info[blade].pnode = pnode;
948 uv_blade_info[blade].nr_possible_cpus = 0;
949 uv_blade_info[blade].nr_online_cpus = 0;
950 spin_lock_init(&uv_blade_info[blade].nmi_lock);
951 min_pnode = min(pnode, min_pnode);
952 max_pnode = max(pnode, max_pnode);
953 blade++;
954 }
955 }
956
957 uv_bios_init();
958 uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id,
959 &sn_region_size, &system_serial_number);
960 uv_rtc_init();
961
962 for_each_present_cpu(cpu) {
963 int apicid = per_cpu(x86_cpu_to_apicid, cpu);
964
965 nid = cpu_to_node(cpu);
966 /*
967 * apic_pnode_shift must be set before calling uv_apicid_to_pnode();
968 */
969 uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
970 uv_cpu_hub_info(cpu)->apic_pnode_shift = uvh_apicid.s.pnode_shift;
971 uv_cpu_hub_info(cpu)->hub_revision = uv_hub_info->hub_revision;
972
973 uv_cpu_hub_info(cpu)->m_shift = 64 - m_val;
974 uv_cpu_hub_info(cpu)->n_lshift = n_lshift;
975
976 pnode = uv_apicid_to_pnode(apicid);
977 blade = boot_pnode_to_blade(pnode);
978 lcpu = uv_blade_info[blade].nr_possible_cpus;
979 uv_blade_info[blade].nr_possible_cpus++;
980
981 /* Any node on the blade, else will contain -1. */
982 uv_blade_info[blade].memory_nid = nid;
983
984 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
985 uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
986 uv_cpu_hub_info(cpu)->m_val = m_val;
987 uv_cpu_hub_info(cpu)->n_val = n_val;
988 uv_cpu_hub_info(cpu)->numa_blade_id = blade;
989 uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
990 uv_cpu_hub_info(cpu)->pnode = pnode;
991 uv_cpu_hub_info(cpu)->gpa_mask = (1UL << (m_val + n_val)) - 1;
992 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
993 uv_cpu_hub_info(cpu)->gnode_extra = gnode_extra;
994 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
995 uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
996 uv_cpu_hub_info(cpu)->scir.offset = uv_scir_offset(apicid);
997 uv_node_to_blade[nid] = blade;
998 uv_cpu_to_blade[cpu] = blade;
999 }
1000
1001 /* Add blade/pnode info for nodes without cpus */
1002 for_each_online_node(nid) {
1003 if (uv_node_to_blade[nid] >= 0)
1004 continue;
1005 paddr = node_start_pfn(nid) << PAGE_SHIFT;
1006 pnode = uv_gpa_to_pnode(uv_soc_phys_ram_to_gpa(paddr));
1007 blade = boot_pnode_to_blade(pnode);
1008 uv_node_to_blade[nid] = blade;
1009 }
1010
1011 map_gru_high(max_pnode);
1012 map_mmr_high(max_pnode);
1013 map_mmioh_high(min_pnode, max_pnode);
1014
1015 uv_nmi_setup();
1016 uv_cpu_init();
1017 uv_scir_register_cpu_notifier();
1018 proc_mkdir("sgi_uv", NULL);
1019
1020 /* register Legacy VGA I/O redirection handler */
1021 pci_register_set_vga_state(uv_set_vga_state);
1022
1023 /*
1024 * For a kdump kernel the reset must be BOOT_ACPI, not BOOT_EFI, as
1025 * EFI is not enabled in the kdump kernel.
1026 */
1027 if (is_kdump_kernel())
1028 reboot_type = BOOT_ACPI;
1029 }
1030
1031 apic_driver(apic_x2apic_uv_x);
Linux with added FPC-III support