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authorDavid Rientjes <rientjes@google.com>2014-02-11 21:11:13 -0500
committerDavid Rientjes <rientjes@google.com>2014-02-11 21:11:13 -0500
commit7cf6c94591bbf3dbe3bf9573a6551328ad76d885 (patch)
treec658d8d70147878538a3d696affaa2d19b582c88 /arch/x86/kernel/apic
parent58f5d2d44883739e43d57334704b7f16f902e463 (diff)
x86, apic: Remove support for IBM Summit/EXA chipset
There should no longer be any IBM x440 systems or those using the Summit/EXA chipset out in the wild, so remove support for it. We've done our due diligence in reaching out to any contact information listed for this chipset and no indication was given that it should be kept around. Signed-off-by: David Rientjes <rientjes@google.com>
Diffstat (limited to 'arch/x86/kernel/apic')
-rw-r--r--arch/x86/kernel/apic/Makefile1
-rw-r--r--arch/x86/kernel/apic/summit_32.c550
2 files changed, 0 insertions, 551 deletions
diff --git a/arch/x86/kernel/apic/Makefile b/arch/x86/kernel/apic/Makefile
index 7b600c68ed20..70e141520ad7 100644
--- a/arch/x86/kernel/apic/Makefile
+++ b/arch/x86/kernel/apic/Makefile
@@ -19,7 +19,6 @@ endif
19 19
20# APIC probe will depend on the listing order here 20# APIC probe will depend on the listing order here
21obj-$(CONFIG_X86_NUMAQ) += numaq_32.o 21obj-$(CONFIG_X86_NUMAQ) += numaq_32.o
22obj-$(CONFIG_X86_SUMMIT) += summit_32.o
23obj-$(CONFIG_X86_BIGSMP) += bigsmp_32.o 22obj-$(CONFIG_X86_BIGSMP) += bigsmp_32.o
24 23
25# For 32bit, probe_32 need to be listed last 24# For 32bit, probe_32 need to be listed last
diff --git a/arch/x86/kernel/apic/summit_32.c b/arch/x86/kernel/apic/summit_32.c
deleted file mode 100644
index b656128611cd..000000000000
--- a/arch/x86/kernel/apic/summit_32.c
+++ /dev/null
@@ -1,550 +0,0 @@
1/*
2 * IBM Summit-Specific Code
3 *
4 * Written By: Matthew Dobson, IBM Corporation
5 *
6 * Copyright (c) 2003 IBM Corp.
7 *
8 * All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
18 * NON INFRINGEMENT. See the GNU General Public License for more
19 * details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 * Send feedback to <colpatch@us.ibm.com>
26 *
27 */
28
29#define pr_fmt(fmt) "summit: %s: " fmt, __func__
30
31#include <linux/mm.h>
32#include <asm/io.h>
33#include <asm/bios_ebda.h>
34
35/*
36 * APIC driver for the IBM "Summit" chipset.
37 */
38#include <linux/threads.h>
39#include <linux/cpumask.h>
40#include <asm/mpspec.h>
41#include <asm/apic.h>
42#include <asm/smp.h>
43#include <asm/fixmap.h>
44#include <asm/apicdef.h>
45#include <asm/ipi.h>
46#include <linux/kernel.h>
47#include <linux/string.h>
48#include <linux/gfp.h>
49#include <linux/smp.h>
50
51static unsigned summit_get_apic_id(unsigned long x)
52{
53 return (x >> 24) & 0xFF;
54}
55
56static inline void summit_send_IPI_mask(const struct cpumask *mask, int vector)
57{
58 default_send_IPI_mask_sequence_logical(mask, vector);
59}
60
61static void summit_send_IPI_allbutself(int vector)
62{
63 default_send_IPI_mask_allbutself_logical(cpu_online_mask, vector);
64}
65
66static void summit_send_IPI_all(int vector)
67{
68 summit_send_IPI_mask(cpu_online_mask, vector);
69}
70
71#include <asm/tsc.h>
72
73extern int use_cyclone;
74
75#ifdef CONFIG_X86_SUMMIT_NUMA
76static void setup_summit(void);
77#else
78static inline void setup_summit(void) {}
79#endif
80
81static int summit_mps_oem_check(struct mpc_table *mpc, char *oem,
82 char *productid)
83{
84 if (!strncmp(oem, "IBM ENSW", 8) &&
85 (!strncmp(productid, "VIGIL SMP", 9)
86 || !strncmp(productid, "EXA", 3)
87 || !strncmp(productid, "RUTHLESS SMP", 12))){
88 mark_tsc_unstable("Summit based system");
89 use_cyclone = 1; /*enable cyclone-timer*/
90 setup_summit();
91 return 1;
92 }
93 return 0;
94}
95
96/* Hook from generic ACPI tables.c */
97static int summit_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
98{
99 if (!strncmp(oem_id, "IBM", 3) &&
100 (!strncmp(oem_table_id, "SERVIGIL", 8)
101 || !strncmp(oem_table_id, "EXA", 3))){
102 mark_tsc_unstable("Summit based system");
103 use_cyclone = 1; /*enable cyclone-timer*/
104 setup_summit();
105 return 1;
106 }
107 return 0;
108}
109
110struct rio_table_hdr {
111 unsigned char version; /* Version number of this data structure */
112 /* Version 3 adds chassis_num & WP_index */
113 unsigned char num_scal_dev; /* # of Scalability devices (Twisters for Vigil) */
114 unsigned char num_rio_dev; /* # of RIO I/O devices (Cyclones and Winnipegs) */
115} __attribute__((packed));
116
117struct scal_detail {
118 unsigned char node_id; /* Scalability Node ID */
119 unsigned long CBAR; /* Address of 1MB register space */
120 unsigned char port0node; /* Node ID port connected to: 0xFF=None */
121 unsigned char port0port; /* Port num port connected to: 0,1,2, or 0xFF=None */
122 unsigned char port1node; /* Node ID port connected to: 0xFF = None */
123 unsigned char port1port; /* Port num port connected to: 0,1,2, or 0xFF=None */
124 unsigned char port2node; /* Node ID port connected to: 0xFF = None */
125 unsigned char port2port; /* Port num port connected to: 0,1,2, or 0xFF=None */
126 unsigned char chassis_num; /* 1 based Chassis number (1 = boot node) */
127} __attribute__((packed));
128
129struct rio_detail {
130 unsigned char node_id; /* RIO Node ID */
131 unsigned long BBAR; /* Address of 1MB register space */
132 unsigned char type; /* Type of device */
133 unsigned char owner_id; /* For WPEG: Node ID of Cyclone that owns this WPEG*/
134 /* For CYC: Node ID of Twister that owns this CYC */
135 unsigned char port0node; /* Node ID port connected to: 0xFF=None */
136 unsigned char port0port; /* Port num port connected to: 0,1,2, or 0xFF=None */
137 unsigned char port1node; /* Node ID port connected to: 0xFF=None */
138 unsigned char port1port; /* Port num port connected to: 0,1,2, or 0xFF=None */
139 unsigned char first_slot; /* For WPEG: Lowest slot number below this WPEG */
140 /* For CYC: 0 */
141 unsigned char status; /* For WPEG: Bit 0 = 1 : the XAPIC is used */
142 /* = 0 : the XAPIC is not used, ie:*/
143 /* ints fwded to another XAPIC */
144 /* Bits1:7 Reserved */
145 /* For CYC: Bits0:7 Reserved */
146 unsigned char WP_index; /* For WPEG: WPEG instance index - lower ones have */
147 /* lower slot numbers/PCI bus numbers */
148 /* For CYC: No meaning */
149 unsigned char chassis_num; /* 1 based Chassis number */
150 /* For LookOut WPEGs this field indicates the */
151 /* Expansion Chassis #, enumerated from Boot */
152 /* Node WPEG external port, then Boot Node CYC */
153 /* external port, then Next Vigil chassis WPEG */
154 /* external port, etc. */
155 /* Shared Lookouts have only 1 chassis number (the */
156 /* first one assigned) */
157} __attribute__((packed));
158
159
160typedef enum {
161 CompatTwister = 0, /* Compatibility Twister */
162 AltTwister = 1, /* Alternate Twister of internal 8-way */
163 CompatCyclone = 2, /* Compatibility Cyclone */
164 AltCyclone = 3, /* Alternate Cyclone of internal 8-way */
165 CompatWPEG = 4, /* Compatibility WPEG */
166 AltWPEG = 5, /* Second Planar WPEG */
167 LookOutAWPEG = 6, /* LookOut WPEG */
168 LookOutBWPEG = 7, /* LookOut WPEG */
169} node_type;
170
171static inline int is_WPEG(struct rio_detail *rio){
172 return (rio->type == CompatWPEG || rio->type == AltWPEG ||
173 rio->type == LookOutAWPEG || rio->type == LookOutBWPEG);
174}
175
176#define SUMMIT_APIC_DFR_VALUE (APIC_DFR_CLUSTER)
177
178static const struct cpumask *summit_target_cpus(void)
179{
180 /* CPU_MASK_ALL (0xff) has undefined behaviour with
181 * dest_LowestPrio mode logical clustered apic interrupt routing
182 * Just start on cpu 0. IRQ balancing will spread load
183 */
184 return cpumask_of(0);
185}
186
187static unsigned long summit_check_apicid_used(physid_mask_t *map, int apicid)
188{
189 return 0;
190}
191
192/* we don't use the phys_cpu_present_map to indicate apicid presence */
193static unsigned long summit_check_apicid_present(int bit)
194{
195 return 1;
196}
197
198static int summit_early_logical_apicid(int cpu)
199{
200 int count = 0;
201 u8 my_id = early_per_cpu(x86_cpu_to_apicid, cpu);
202 u8 my_cluster = APIC_CLUSTER(my_id);
203#ifdef CONFIG_SMP
204 u8 lid;
205 int i;
206
207 /* Create logical APIC IDs by counting CPUs already in cluster. */
208 for (count = 0, i = nr_cpu_ids; --i >= 0; ) {
209 lid = early_per_cpu(x86_cpu_to_logical_apicid, i);
210 if (lid != BAD_APICID && APIC_CLUSTER(lid) == my_cluster)
211 ++count;
212 }
213#endif
214 /* We only have a 4 wide bitmap in cluster mode. If a deranged
215 * BIOS puts 5 CPUs in one APIC cluster, we're hosed. */
216 BUG_ON(count >= XAPIC_DEST_CPUS_SHIFT);
217 return my_cluster | (1UL << count);
218}
219
220static void summit_init_apic_ldr(void)
221{
222 int cpu = smp_processor_id();
223 unsigned long id = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
224 unsigned long val;
225
226 apic_write(APIC_DFR, SUMMIT_APIC_DFR_VALUE);
227 val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
228 val |= SET_APIC_LOGICAL_ID(id);
229 apic_write(APIC_LDR, val);
230}
231
232static int summit_apic_id_registered(void)
233{
234 return 1;
235}
236
237static void summit_setup_apic_routing(void)
238{
239 pr_info("Enabling APIC mode: Summit. Using %d I/O APICs\n",
240 nr_ioapics);
241}
242
243static int summit_cpu_present_to_apicid(int mps_cpu)
244{
245 if (mps_cpu < nr_cpu_ids)
246 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
247 else
248 return BAD_APICID;
249}
250
251static void summit_ioapic_phys_id_map(physid_mask_t *phys_id_map, physid_mask_t *retmap)
252{
253 /* For clustered we don't have a good way to do this yet - hack */
254 physids_promote(0x0FL, retmap);
255}
256
257static void summit_apicid_to_cpu_present(int apicid, physid_mask_t *retmap)
258{
259 physid_set_mask_of_physid(0, retmap);
260}
261
262static int summit_check_phys_apicid_present(int physical_apicid)
263{
264 return 1;
265}
266
267static inline int
268summit_cpu_mask_to_apicid(const struct cpumask *cpumask, unsigned int *dest_id)
269{
270 unsigned int round = 0;
271 unsigned int cpu, apicid = 0;
272
273 /*
274 * The cpus in the mask must all be on the apic cluster.
275 */
276 for_each_cpu_and(cpu, cpumask, cpu_online_mask) {
277 int new_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
278
279 if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
280 pr_err("Not a valid mask!\n");
281 return -EINVAL;
282 }
283 apicid |= new_apicid;
284 round++;
285 }
286 if (!round)
287 return -EINVAL;
288 *dest_id = apicid;
289 return 0;
290}
291
292static int
293summit_cpu_mask_to_apicid_and(const struct cpumask *inmask,
294 const struct cpumask *andmask,
295 unsigned int *apicid)
296{
297 cpumask_var_t cpumask;
298 *apicid = early_per_cpu(x86_cpu_to_logical_apicid, 0);
299
300 if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
301 return 0;
302
303 cpumask_and(cpumask, inmask, andmask);
304 summit_cpu_mask_to_apicid(cpumask, apicid);
305
306 free_cpumask_var(cpumask);
307
308 return 0;
309}
310
311/*
312 * cpuid returns the value latched in the HW at reset, not the APIC ID
313 * register's value. For any box whose BIOS changes APIC IDs, like
314 * clustered APIC systems, we must use hard_smp_processor_id.
315 *
316 * See Intel's IA-32 SW Dev's Manual Vol2 under CPUID.
317 */
318static int summit_phys_pkg_id(int cpuid_apic, int index_msb)
319{
320 return hard_smp_processor_id() >> index_msb;
321}
322
323static int probe_summit(void)
324{
325 /* probed later in mptable/ACPI hooks */
326 return 0;
327}
328
329#ifdef CONFIG_X86_SUMMIT_NUMA
330static struct rio_table_hdr *rio_table_hdr;
331static struct scal_detail *scal_devs[MAX_NUMNODES];
332static struct rio_detail *rio_devs[MAX_NUMNODES*4];
333
334#ifndef CONFIG_X86_NUMAQ
335static int mp_bus_id_to_node[MAX_MP_BUSSES];
336#endif
337
338static int setup_pci_node_map_for_wpeg(int wpeg_num, int last_bus)
339{
340 int twister = 0, node = 0;
341 int i, bus, num_buses;
342
343 for (i = 0; i < rio_table_hdr->num_rio_dev; i++) {
344 if (rio_devs[i]->node_id == rio_devs[wpeg_num]->owner_id) {
345 twister = rio_devs[i]->owner_id;
346 break;
347 }
348 }
349 if (i == rio_table_hdr->num_rio_dev) {
350 pr_err("Couldn't find owner Cyclone for Winnipeg!\n");
351 return last_bus;
352 }
353
354 for (i = 0; i < rio_table_hdr->num_scal_dev; i++) {
355 if (scal_devs[i]->node_id == twister) {
356 node = scal_devs[i]->node_id;
357 break;
358 }
359 }
360 if (i == rio_table_hdr->num_scal_dev) {
361 pr_err("Couldn't find owner Twister for Cyclone!\n");
362 return last_bus;
363 }
364
365 switch (rio_devs[wpeg_num]->type) {
366 case CompatWPEG:
367 /*
368 * The Compatibility Winnipeg controls the 2 legacy buses,
369 * the 66MHz PCI bus [2 slots] and the 2 "extra" buses in case
370 * a PCI-PCI bridge card is used in either slot: total 5 buses.
371 */
372 num_buses = 5;
373 break;
374 case AltWPEG:
375 /*
376 * The Alternate Winnipeg controls the 2 133MHz buses [1 slot
377 * each], their 2 "extra" buses, the 100MHz bus [2 slots] and
378 * the "extra" buses for each of those slots: total 7 buses.
379 */
380 num_buses = 7;
381 break;
382 case LookOutAWPEG:
383 case LookOutBWPEG:
384 /*
385 * A Lookout Winnipeg controls 3 100MHz buses [2 slots each]
386 * & the "extra" buses for each of those slots: total 9 buses.
387 */
388 num_buses = 9;
389 break;
390 default:
391 pr_info("Unsupported Winnipeg type!\n");
392 return last_bus;
393 }
394
395 for (bus = last_bus; bus < last_bus + num_buses; bus++)
396 mp_bus_id_to_node[bus] = node;
397 return bus;
398}
399
400static int build_detail_arrays(void)
401{
402 unsigned long ptr;
403 int i, scal_detail_size, rio_detail_size;
404
405 if (rio_table_hdr->num_scal_dev > MAX_NUMNODES) {
406 pr_warn("MAX_NUMNODES too low! Defined as %d, but system has %d nodes\n",
407 MAX_NUMNODES, rio_table_hdr->num_scal_dev);
408 return 0;
409 }
410
411 switch (rio_table_hdr->version) {
412 default:
413 pr_warn("Invalid Rio Grande Table Version: %d\n",
414 rio_table_hdr->version);
415 return 0;
416 case 2:
417 scal_detail_size = 11;
418 rio_detail_size = 13;
419 break;
420 case 3:
421 scal_detail_size = 12;
422 rio_detail_size = 15;
423 break;
424 }
425
426 ptr = (unsigned long)rio_table_hdr + 3;
427 for (i = 0; i < rio_table_hdr->num_scal_dev; i++, ptr += scal_detail_size)
428 scal_devs[i] = (struct scal_detail *)ptr;
429
430 for (i = 0; i < rio_table_hdr->num_rio_dev; i++, ptr += rio_detail_size)
431 rio_devs[i] = (struct rio_detail *)ptr;
432
433 return 1;
434}
435
436void setup_summit(void)
437{
438 unsigned long ptr;
439 unsigned short offset;
440 int i, next_wpeg, next_bus = 0;
441
442 /* The pointer to the EBDA is stored in the word @ phys 0x40E(40:0E) */
443 ptr = get_bios_ebda();
444 ptr = (unsigned long)phys_to_virt(ptr);
445
446 rio_table_hdr = NULL;
447 offset = 0x180;
448 while (offset) {
449 /* The block id is stored in the 2nd word */
450 if (*((unsigned short *)(ptr + offset + 2)) == 0x4752) {
451 /* set the pointer past the offset & block id */
452 rio_table_hdr = (struct rio_table_hdr *)(ptr + offset + 4);
453 break;
454 }
455 /* The next offset is stored in the 1st word. 0 means no more */
456 offset = *((unsigned short *)(ptr + offset));
457 }
458 if (!rio_table_hdr) {
459 pr_err("Unable to locate Rio Grande Table in EBDA - bailing!\n");
460 return;
461 }
462
463 if (!build_detail_arrays())
464 return;
465
466 /* The first Winnipeg we're looking for has an index of 0 */
467 next_wpeg = 0;
468 do {
469 for (i = 0; i < rio_table_hdr->num_rio_dev; i++) {
470 if (is_WPEG(rio_devs[i]) && rio_devs[i]->WP_index == next_wpeg) {
471 /* It's the Winnipeg we're looking for! */
472 next_bus = setup_pci_node_map_for_wpeg(i, next_bus);
473 next_wpeg++;
474 break;
475 }
476 }
477 /*
478 * If we go through all Rio devices and don't find one with
479 * the next index, it means we've found all the Winnipegs,
480 * and thus all the PCI buses.
481 */
482 if (i == rio_table_hdr->num_rio_dev)
483 next_wpeg = 0;
484 } while (next_wpeg != 0);
485}
486#endif
487
488static struct apic apic_summit = {
489
490 .name = "summit",
491 .probe = probe_summit,
492 .acpi_madt_oem_check = summit_acpi_madt_oem_check,
493 .apic_id_valid = default_apic_id_valid,
494 .apic_id_registered = summit_apic_id_registered,
495
496 .irq_delivery_mode = dest_LowestPrio,
497 /* logical delivery broadcast to all CPUs: */
498 .irq_dest_mode = 1,
499
500 .target_cpus = summit_target_cpus,
501 .disable_esr = 1,
502 .dest_logical = APIC_DEST_LOGICAL,
503 .check_apicid_used = summit_check_apicid_used,
504 .check_apicid_present = summit_check_apicid_present,
505
506 .vector_allocation_domain = flat_vector_allocation_domain,
507 .init_apic_ldr = summit_init_apic_ldr,
508
509 .ioapic_phys_id_map = summit_ioapic_phys_id_map,
510 .setup_apic_routing = summit_setup_apic_routing,
511 .multi_timer_check = NULL,
512 .cpu_present_to_apicid = summit_cpu_present_to_apicid,
513 .apicid_to_cpu_present = summit_apicid_to_cpu_present,
514 .setup_portio_remap = NULL,
515 .check_phys_apicid_present = summit_check_phys_apicid_present,
516 .enable_apic_mode = NULL,
517 .phys_pkg_id = summit_phys_pkg_id,
518 .mps_oem_check = summit_mps_oem_check,
519
520 .get_apic_id = summit_get_apic_id,
521 .set_apic_id = NULL,
522 .apic_id_mask = 0xFF << 24,
523
524 .cpu_mask_to_apicid_and = summit_cpu_mask_to_apicid_and,
525
526 .send_IPI_mask = summit_send_IPI_mask,
527 .send_IPI_mask_allbutself = NULL,
528 .send_IPI_allbutself = summit_send_IPI_allbutself,
529 .send_IPI_all = summit_send_IPI_all,
530 .send_IPI_self = default_send_IPI_self,
531
532 .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
533 .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
534
535 .wait_for_init_deassert = true,
536 .smp_callin_clear_local_apic = NULL,
537 .inquire_remote_apic = default_inquire_remote_apic,
538
539 .read = native_apic_mem_read,
540 .write = native_apic_mem_write,
541 .eoi_write = native_apic_mem_write,
542 .icr_read = native_apic_icr_read,
543 .icr_write = native_apic_icr_write,
544 .wait_icr_idle = native_apic_wait_icr_idle,
545 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
546
547 .x86_32_early_logical_apicid = summit_early_logical_apicid,
548};
549
550apic_driver(apic_summit);
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