2 * Copyright IBM Corp. 2007,2012
4 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
5 * Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
8 #define KMSG_COMPONENT "sclp_cmd"
9 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11 #include <linux/completion.h>
12 #include <linux/init.h>
13 #include <linux/errno.h>
14 #include <linux/err.h>
15 #include <linux/export.h>
16 #include <linux/slab.h>
17 #include <linux/string.h>
19 #include <linux/mmzone.h>
20 #include <linux/memory.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <asm/ctl_reg.h>
24 #include <asm/chpid.h>
25 #include <asm/setup.h>
31 static void sclp_sync_callback(struct sclp_req
*req
, void *data
)
33 struct completion
*completion
= data
;
38 int sclp_sync_request(sclp_cmdw_t cmd
, void *sccb
)
40 return sclp_sync_request_timeout(cmd
, sccb
, 0);
43 int sclp_sync_request_timeout(sclp_cmdw_t cmd
, void *sccb
, int timeout
)
45 struct completion completion
;
46 struct sclp_req
*request
;
49 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
53 request
->queue_timeout
= timeout
;
54 request
->command
= cmd
;
56 request
->status
= SCLP_REQ_FILLED
;
57 request
->callback
= sclp_sync_callback
;
58 request
->callback_data
= &completion
;
59 init_completion(&completion
);
61 /* Perform sclp request. */
62 rc
= sclp_add_request(request
);
65 wait_for_completion(&completion
);
68 if (request
->status
!= SCLP_REQ_DONE
) {
69 pr_warning("sync request failed (cmd=0x%08x, "
70 "status=0x%02x)\n", cmd
, request
->status
);
79 * CPU configuration related functions.
82 #define SCLP_CMDW_READ_CPU_INFO 0x00010001
83 #define SCLP_CMDW_CONFIGURE_CPU 0x00110001
84 #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001
86 struct read_cpu_info_sccb
{
87 struct sccb_header header
;
89 u16 offset_configured
;
92 u8 reserved
[4096 - 16];
93 } __attribute__((packed
, aligned(PAGE_SIZE
)));
95 static void sclp_fill_cpu_info(struct sclp_cpu_info
*info
,
96 struct read_cpu_info_sccb
*sccb
)
98 char *page
= (char *) sccb
;
100 memset(info
, 0, sizeof(*info
));
101 info
->configured
= sccb
->nr_configured
;
102 info
->standby
= sccb
->nr_standby
;
103 info
->combined
= sccb
->nr_configured
+ sccb
->nr_standby
;
104 info
->has_cpu_type
= sclp_fac84
& 0x1;
105 memcpy(&info
->cpu
, page
+ sccb
->offset_configured
,
106 info
->combined
* sizeof(struct sclp_cpu_entry
));
109 int sclp_get_cpu_info(struct sclp_cpu_info
*info
)
112 struct read_cpu_info_sccb
*sccb
;
114 if (!SCLP_HAS_CPU_INFO
)
116 sccb
= (void *) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
119 sccb
->header
.length
= sizeof(*sccb
);
120 rc
= sclp_sync_request_timeout(SCLP_CMDW_READ_CPU_INFO
, sccb
,
121 SCLP_QUEUE_INTERVAL
);
124 if (sccb
->header
.response_code
!= 0x0010) {
125 pr_warning("readcpuinfo failed (response=0x%04x)\n",
126 sccb
->header
.response_code
);
130 sclp_fill_cpu_info(info
, sccb
);
132 free_page((unsigned long) sccb
);
136 struct cpu_configure_sccb
{
137 struct sccb_header header
;
138 } __attribute__((packed
, aligned(8)));
140 static int do_cpu_configure(sclp_cmdw_t cmd
)
142 struct cpu_configure_sccb
*sccb
;
145 if (!SCLP_HAS_CPU_RECONFIG
)
148 * This is not going to cross a page boundary since we force
149 * kmalloc to have a minimum alignment of 8 bytes on s390.
151 sccb
= kzalloc(sizeof(*sccb
), GFP_KERNEL
| GFP_DMA
);
154 sccb
->header
.length
= sizeof(*sccb
);
155 rc
= sclp_sync_request_timeout(cmd
, sccb
, SCLP_QUEUE_INTERVAL
);
158 switch (sccb
->header
.response_code
) {
163 pr_warning("configure cpu failed (cmd=0x%08x, "
164 "response=0x%04x)\n", cmd
,
165 sccb
->header
.response_code
);
174 int sclp_cpu_configure(u8 cpu
)
176 return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU
| cpu
<< 8);
179 int sclp_cpu_deconfigure(u8 cpu
)
181 return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU
| cpu
<< 8);
184 #ifdef CONFIG_MEMORY_HOTPLUG
186 static DEFINE_MUTEX(sclp_mem_mutex
);
187 static LIST_HEAD(sclp_mem_list
);
188 static u8 sclp_max_storage_id
;
189 static unsigned long sclp_storage_ids
[256 / BITS_PER_LONG
];
190 static int sclp_mem_state_changed
;
192 struct memory_increment
{
193 struct list_head list
;
198 struct assign_storage_sccb
{
199 struct sccb_header header
;
203 int arch_get_memory_phys_device(unsigned long start_pfn
)
207 return PFN_PHYS(start_pfn
) >> ilog2(sclp_rzm
);
210 static unsigned long long rn2addr(u16 rn
)
212 return (unsigned long long) (rn
- 1) * sclp_rzm
;
215 static int do_assign_storage(sclp_cmdw_t cmd
, u16 rn
)
217 struct assign_storage_sccb
*sccb
;
220 sccb
= (void *) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
223 sccb
->header
.length
= PAGE_SIZE
;
225 rc
= sclp_sync_request_timeout(cmd
, sccb
, SCLP_QUEUE_INTERVAL
);
228 switch (sccb
->header
.response_code
) {
233 pr_warning("assign storage failed (cmd=0x%08x, "
234 "response=0x%04x, rn=0x%04x)\n", cmd
,
235 sccb
->header
.response_code
, rn
);
240 free_page((unsigned long) sccb
);
244 static int sclp_assign_storage(u16 rn
)
246 unsigned long long start
;
249 rc
= do_assign_storage(0x000d0001, rn
);
253 storage_key_init_range(start
, start
+ sclp_rzm
);
257 static int sclp_unassign_storage(u16 rn
)
259 return do_assign_storage(0x000c0001, rn
);
262 struct attach_storage_sccb
{
263 struct sccb_header header
;
270 static int sclp_attach_storage(u8 id
)
272 struct attach_storage_sccb
*sccb
;
276 sccb
= (void *) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
279 sccb
->header
.length
= PAGE_SIZE
;
280 rc
= sclp_sync_request_timeout(0x00080001 | id
<< 8, sccb
,
281 SCLP_QUEUE_INTERVAL
);
284 switch (sccb
->header
.response_code
) {
286 set_bit(id
, sclp_storage_ids
);
287 for (i
= 0; i
< sccb
->assigned
; i
++) {
288 if (sccb
->entries
[i
])
289 sclp_unassign_storage(sccb
->entries
[i
] >> 16);
297 free_page((unsigned long) sccb
);
301 static int sclp_mem_change_state(unsigned long start
, unsigned long size
,
304 struct memory_increment
*incr
;
305 unsigned long long istart
;
308 list_for_each_entry(incr
, &sclp_mem_list
, list
) {
309 istart
= rn2addr(incr
->rn
);
310 if (start
+ size
- 1 < istart
)
312 if (start
> istart
+ sclp_rzm
- 1)
315 rc
|= sclp_assign_storage(incr
->rn
);
317 sclp_unassign_storage(incr
->rn
);
319 return rc
? -EIO
: 0;
322 static int sclp_mem_notifier(struct notifier_block
*nb
,
323 unsigned long action
, void *data
)
325 unsigned long start
, size
;
326 struct memory_notify
*arg
;
331 start
= arg
->start_pfn
<< PAGE_SHIFT
;
332 size
= arg
->nr_pages
<< PAGE_SHIFT
;
333 mutex_lock(&sclp_mem_mutex
);
334 for_each_clear_bit(id
, sclp_storage_ids
, sclp_max_storage_id
+ 1)
335 sclp_attach_storage(id
);
338 case MEM_GOING_OFFLINE
:
339 case MEM_CANCEL_OFFLINE
:
341 case MEM_GOING_ONLINE
:
342 rc
= sclp_mem_change_state(start
, size
, 1);
344 case MEM_CANCEL_ONLINE
:
345 sclp_mem_change_state(start
, size
, 0);
348 sclp_mem_change_state(start
, size
, 0);
355 sclp_mem_state_changed
= 1;
356 mutex_unlock(&sclp_mem_mutex
);
357 return rc
? NOTIFY_BAD
: NOTIFY_OK
;
360 static struct notifier_block sclp_mem_nb
= {
361 .notifier_call
= sclp_mem_notifier
,
364 static void __init
add_memory_merged(u16 rn
)
366 static u16 first_rn
, num
;
367 unsigned long long start
, size
;
369 if (rn
&& first_rn
&& (first_rn
+ num
== rn
)) {
375 start
= rn2addr(first_rn
);
376 size
= (unsigned long long) num
* sclp_rzm
;
377 if (start
>= VMEM_MAX_PHYS
)
379 if (start
+ size
> VMEM_MAX_PHYS
)
380 size
= VMEM_MAX_PHYS
- start
;
381 if (memory_end_set
&& (start
>= memory_end
))
383 if (memory_end_set
&& (start
+ size
> memory_end
))
384 size
= memory_end
- start
;
385 add_memory(0, start
, size
);
391 static void __init
sclp_add_standby_memory(void)
393 struct memory_increment
*incr
;
395 list_for_each_entry(incr
, &sclp_mem_list
, list
)
397 add_memory_merged(incr
->rn
);
398 add_memory_merged(0);
401 static void __init
insert_increment(u16 rn
, int standby
, int assigned
)
403 struct memory_increment
*incr
, *new_incr
;
404 struct list_head
*prev
;
407 new_incr
= kzalloc(sizeof(*new_incr
), GFP_KERNEL
);
411 new_incr
->standby
= standby
;
413 prev
= &sclp_mem_list
;
414 list_for_each_entry(incr
, &sclp_mem_list
, list
) {
415 if (assigned
&& incr
->rn
> rn
)
417 if (!assigned
&& incr
->rn
- last_rn
> 1)
423 new_incr
->rn
= last_rn
+ 1;
424 if (new_incr
->rn
> sclp_rnmax
) {
428 list_add(&new_incr
->list
, prev
);
431 static int sclp_mem_freeze(struct device
*dev
)
433 if (!sclp_mem_state_changed
)
435 pr_err("Memory hotplug state changed, suspend refused.\n");
439 struct read_storage_sccb
{
440 struct sccb_header header
;
448 static const struct dev_pm_ops sclp_mem_pm_ops
= {
449 .freeze
= sclp_mem_freeze
,
452 static struct platform_driver sclp_mem_pdrv
= {
455 .pm
= &sclp_mem_pm_ops
,
459 static int __init
sclp_detect_standby_memory(void)
461 struct platform_device
*sclp_pdev
;
462 struct read_storage_sccb
*sccb
;
463 int i
, id
, assigned
, rc
;
465 if (OLDMEM_BASE
) /* No standby memory in kdump mode */
467 if ((sclp_facilities
& 0xe00000000000ULL
) != 0xe00000000000ULL
)
470 sccb
= (void *) __get_free_page(GFP_KERNEL
| GFP_DMA
);
474 for (id
= 0; id
<= sclp_max_storage_id
; id
++) {
475 memset(sccb
, 0, PAGE_SIZE
);
476 sccb
->header
.length
= PAGE_SIZE
;
477 rc
= sclp_sync_request(0x00040001 | id
<< 8, sccb
);
480 switch (sccb
->header
.response_code
) {
482 set_bit(id
, sclp_storage_ids
);
483 for (i
= 0; i
< sccb
->assigned
; i
++) {
484 if (!sccb
->entries
[i
])
487 insert_increment(sccb
->entries
[i
] >> 16, 0, 1);
493 for (i
= 0; i
< sccb
->assigned
; i
++) {
494 if (!sccb
->entries
[i
])
497 insert_increment(sccb
->entries
[i
] >> 16, 1, 1);
505 sclp_max_storage_id
= sccb
->max_id
;
507 if (rc
|| list_empty(&sclp_mem_list
))
509 for (i
= 1; i
<= sclp_rnmax
- assigned
; i
++)
510 insert_increment(0, 1, 0);
511 rc
= register_memory_notifier(&sclp_mem_nb
);
514 rc
= platform_driver_register(&sclp_mem_pdrv
);
517 sclp_pdev
= platform_device_register_simple("sclp_mem", -1, NULL
, 0);
518 rc
= PTR_ERR_OR_ZERO(sclp_pdev
);
521 sclp_add_standby_memory();
524 platform_driver_unregister(&sclp_mem_pdrv
);
526 free_page((unsigned long) sccb
);
529 __initcall(sclp_detect_standby_memory
);
531 #endif /* CONFIG_MEMORY_HOTPLUG */
534 * PCI I/O adapter configuration related functions.
536 #define SCLP_CMDW_CONFIGURE_PCI 0x001a0001
537 #define SCLP_CMDW_DECONFIGURE_PCI 0x001b0001
539 #define SCLP_RECONFIG_PCI_ATPYE 2
541 struct pci_cfg_sccb
{
542 struct sccb_header header
;
543 u8 atype
; /* adapter type */
546 u32 aid
; /* adapter identifier */
549 static int do_pci_configure(sclp_cmdw_t cmd
, u32 fid
)
551 struct pci_cfg_sccb
*sccb
;
554 if (!SCLP_HAS_PCI_RECONFIG
)
557 sccb
= (struct pci_cfg_sccb
*) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
561 sccb
->header
.length
= PAGE_SIZE
;
562 sccb
->atype
= SCLP_RECONFIG_PCI_ATPYE
;
564 rc
= sclp_sync_request(cmd
, sccb
);
567 switch (sccb
->header
.response_code
) {
572 pr_warn("configure PCI I/O adapter failed: cmd=0x%08x response=0x%04x\n",
573 cmd
, sccb
->header
.response_code
);
578 free_page((unsigned long) sccb
);
582 int sclp_pci_configure(u32 fid
)
584 return do_pci_configure(SCLP_CMDW_CONFIGURE_PCI
, fid
);
586 EXPORT_SYMBOL(sclp_pci_configure
);
588 int sclp_pci_deconfigure(u32 fid
)
590 return do_pci_configure(SCLP_CMDW_DECONFIGURE_PCI
, fid
);
592 EXPORT_SYMBOL(sclp_pci_deconfigure
);
595 * Channel path configuration related functions.
598 #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001
599 #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001
600 #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001
602 struct chp_cfg_sccb
{
603 struct sccb_header header
;
607 } __attribute__((packed
));
609 static int do_chp_configure(sclp_cmdw_t cmd
)
611 struct chp_cfg_sccb
*sccb
;
614 if (!SCLP_HAS_CHP_RECONFIG
)
617 sccb
= (struct chp_cfg_sccb
*) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
620 sccb
->header
.length
= sizeof(*sccb
);
621 rc
= sclp_sync_request(cmd
, sccb
);
624 switch (sccb
->header
.response_code
) {
631 pr_warning("configure channel-path failed "
632 "(cmd=0x%08x, response=0x%04x)\n", cmd
,
633 sccb
->header
.response_code
);
638 free_page((unsigned long) sccb
);
643 * sclp_chp_configure - perform configure channel-path sclp command
644 * @chpid: channel-path ID
646 * Perform configure channel-path command sclp command for specified chpid.
647 * Return 0 after command successfully finished, non-zero otherwise.
649 int sclp_chp_configure(struct chp_id chpid
)
651 return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH
| chpid
.id
<< 8);
655 * sclp_chp_deconfigure - perform deconfigure channel-path sclp command
656 * @chpid: channel-path ID
658 * Perform deconfigure channel-path command sclp command for specified chpid
659 * and wait for completion. On success return 0. Return non-zero otherwise.
661 int sclp_chp_deconfigure(struct chp_id chpid
)
663 return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH
| chpid
.id
<< 8);
666 struct chp_info_sccb
{
667 struct sccb_header header
;
668 u8 recognized
[SCLP_CHP_INFO_MASK_SIZE
];
669 u8 standby
[SCLP_CHP_INFO_MASK_SIZE
];
670 u8 configured
[SCLP_CHP_INFO_MASK_SIZE
];
674 } __attribute__((packed
));
677 * sclp_chp_read_info - perform read channel-path information sclp command
678 * @info: resulting channel-path information data
680 * Perform read channel-path information sclp command and wait for completion.
681 * On success, store channel-path information in @info and return 0. Return
682 * non-zero otherwise.
684 int sclp_chp_read_info(struct sclp_chp_info
*info
)
686 struct chp_info_sccb
*sccb
;
689 if (!SCLP_HAS_CHP_INFO
)
692 sccb
= (struct chp_info_sccb
*) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
695 sccb
->header
.length
= sizeof(*sccb
);
696 rc
= sclp_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION
, sccb
);
699 if (sccb
->header
.response_code
!= 0x0010) {
700 pr_warning("read channel-path info failed "
701 "(response=0x%04x)\n", sccb
->header
.response_code
);
705 memcpy(info
->recognized
, sccb
->recognized
, SCLP_CHP_INFO_MASK_SIZE
);
706 memcpy(info
->standby
, sccb
->standby
, SCLP_CHP_INFO_MASK_SIZE
);
707 memcpy(info
->configured
, sccb
->configured
, SCLP_CHP_INFO_MASK_SIZE
);
709 free_page((unsigned long) sccb
);
713 bool sclp_has_sprp(void)
715 return !!(sclp_fac84
& 0x2);