2 * Copyright (C) 2001 Troy D. Armstrong IBM Corporation
3 * Copyright (C) 2004-2005 Stephen Rothwell IBM Corporation
5 * This modules exists as an interface between a Linux secondary partition
6 * running on an iSeries and the primary partition's Virtual Service
7 * Processor (VSP) object. The VSP has final authority over powering on/off
8 * all partitions in the iSeries. It also provides miscellaneous low-level
9 * machine facility type operations.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include <linux/types.h>
28 #include <linux/errno.h>
29 #include <linux/kernel.h>
30 #include <linux/init.h>
31 #include <linux/completion.h>
32 #include <linux/delay.h>
33 #include <linux/proc_fs.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/bcd.h>
36 #include <linux/rtc.h>
37 #include <linux/slab.h>
40 #include <asm/uaccess.h>
42 #include <asm/abs_addr.h>
43 #include <asm/firmware.h>
44 #include <asm/iseries/mf.h>
45 #include <asm/iseries/hv_lp_config.h>
46 #include <asm/iseries/hv_lp_event.h>
47 #include <asm/iseries/it_lp_queue.h>
51 static int mf_initialized;
54 * This is the structure layout for the Machine Facilites LPAR event
64 u64 state; /* GetStateOut */
65 u64 ipl_type; /* GetIplTypeOut, Function02SelectIplTypeIn */
66 u64 ipl_mode; /* GetIplModeOut, Function02SelectIplModeIn */
67 u64 page[4]; /* GetSrcHistoryIn */
68 u64 flag; /* GetAutoIplWhenPrimaryIplsOut,
69 SetAutoIplWhenPrimaryIplsIn,
70 WhiteButtonPowerOffIn,
71 Function08FastPowerOffIn,
72 IsSpcnRackPowerIncompleteOut */
79 } kern; /* SetKernelImageIn, GetKernelImageIn,
80 SetKernelCmdLineIn, GetKernelCmdLineIn */
81 u32 length_out; /* GetKernelImageOut, GetKernelCmdLineOut */
87 struct completion com;
88 struct vsp_cmd_data *response;
102 typedef void (*ce_msg_comp_hdlr)(void *token, struct ce_msg_data *vsp_cmd_rsp);
104 struct ce_msg_comp_data {
105 ce_msg_comp_hdlr handler;
112 struct ce_msg_comp_data *completion;
115 struct io_mf_lp_event {
116 struct HvLpEvent hp_lp_event;
117 u16 subtype_result_code;
121 struct alloc_data alloc;
122 struct ce_msg_data ce_msg;
123 struct vsp_cmd_data vsp_cmd;
127 #define subtype_data(a, b, c, d) \
128 (((a) << 24) + ((b) << 16) + ((c) << 8) + (d))
131 * All outgoing event traffic is kept on a FIFO queue. The first
132 * pointer points to the one that is outstanding, and all new
133 * requests get stuck on the end. Also, we keep a certain number of
134 * preallocated pending events so that we can operate very early in
135 * the boot up sequence (before kmalloc is ready).
137 struct pending_event {
138 struct pending_event *next;
139 struct io_mf_lp_event event;
140 MFCompleteHandler hdlr;
142 unsigned dma_data_length;
143 unsigned remote_address;
145 static spinlock_t pending_event_spinlock;
146 static struct pending_event *pending_event_head;
147 static struct pending_event *pending_event_tail;
148 static struct pending_event *pending_event_avail;
149 #define PENDING_EVENT_PREALLOC_LEN 16
150 static struct pending_event pending_event_prealloc[PENDING_EVENT_PREALLOC_LEN];
153 * Put a pending event onto the available queue, so it can get reused.
154 * Attention! You must have the pending_event_spinlock before calling!
156 static void free_pending_event(struct pending_event *ev)
159 ev->next = pending_event_avail;
160 pending_event_avail = ev;
165 * Enqueue the outbound event onto the stack. If the queue was
166 * empty to begin with, we must also issue it via the Hypervisor
167 * interface. There is a section of code below that will touch
168 * the first stack pointer without the protection of the pending_event_spinlock.
169 * This is OK, because we know that nobody else will be modifying
170 * the first pointer when we do this.
172 static int signal_event(struct pending_event *ev)
177 struct pending_event *ev1;
180 /* enqueue the event */
183 spin_lock_irqsave(&pending_event_spinlock, flags);
184 if (pending_event_head == NULL)
185 pending_event_head = ev;
188 pending_event_tail->next = ev;
190 pending_event_tail = ev;
191 spin_unlock_irqrestore(&pending_event_spinlock, flags);
198 /* any DMA data to send beforehand? */
199 if (pending_event_head->dma_data_length > 0)
200 HvCallEvent_dmaToSp(pending_event_head->dma_data,
201 pending_event_head->remote_address,
202 pending_event_head->dma_data_length,
203 HvLpDma_Direction_LocalToRemote);
205 hv_rc = HvCallEvent_signalLpEvent(
206 &pending_event_head->event.hp_lp_event);
207 if (hv_rc != HvLpEvent_Rc_Good) {
208 printk(KERN_ERR "mf.c: HvCallEvent_signalLpEvent() "
209 "failed with %d\n", (int)hv_rc);
211 spin_lock_irqsave(&pending_event_spinlock, flags);
212 ev1 = pending_event_head;
213 pending_event_head = pending_event_head->next;
214 if (pending_event_head != NULL)
216 spin_unlock_irqrestore(&pending_event_spinlock, flags);
220 else if (ev1->hdlr != NULL)
221 (*ev1->hdlr)((void *)ev1->event.hp_lp_event.xCorrelationToken, -EIO);
223 spin_lock_irqsave(&pending_event_spinlock, flags);
224 free_pending_event(ev1);
225 spin_unlock_irqrestore(&pending_event_spinlock, flags);
233 * Allocate a new pending_event structure, and initialize it.
235 static struct pending_event *new_pending_event(void)
237 struct pending_event *ev = NULL;
238 HvLpIndex primary_lp = HvLpConfig_getPrimaryLpIndex();
240 struct HvLpEvent *hev;
242 spin_lock_irqsave(&pending_event_spinlock, flags);
243 if (pending_event_avail != NULL) {
244 ev = pending_event_avail;
245 pending_event_avail = pending_event_avail->next;
247 spin_unlock_irqrestore(&pending_event_spinlock, flags);
249 ev = kmalloc(sizeof(struct pending_event), GFP_ATOMIC);
251 printk(KERN_ERR "mf.c: unable to kmalloc %ld bytes\n",
252 sizeof(struct pending_event));
256 memset(ev, 0, sizeof(struct pending_event));
257 hev = &ev->event.hp_lp_event;
258 hev->flags = HV_LP_EVENT_VALID | HV_LP_EVENT_DO_ACK | HV_LP_EVENT_INT;
259 hev->xType = HvLpEvent_Type_MachineFac;
260 hev->xSourceLp = HvLpConfig_getLpIndex();
261 hev->xTargetLp = primary_lp;
262 hev->xSizeMinus1 = sizeof(ev->event) - 1;
263 hev->xRc = HvLpEvent_Rc_Good;
264 hev->xSourceInstanceId = HvCallEvent_getSourceLpInstanceId(primary_lp,
265 HvLpEvent_Type_MachineFac);
266 hev->xTargetInstanceId = HvCallEvent_getTargetLpInstanceId(primary_lp,
267 HvLpEvent_Type_MachineFac);
272 static int __maybe_unused
273 signal_vsp_instruction(struct vsp_cmd_data *vsp_cmd)
275 struct pending_event *ev = new_pending_event();
277 struct vsp_rsp_data response;
282 init_completion(&response.com);
283 response.response = vsp_cmd;
284 ev->event.hp_lp_event.xSubtype = 6;
285 ev->event.hp_lp_event.x.xSubtypeData =
286 subtype_data('M', 'F', 'V', 'I');
287 ev->event.data.vsp_cmd.token = (u64)&response;
288 ev->event.data.vsp_cmd.cmd = vsp_cmd->cmd;
289 ev->event.data.vsp_cmd.lp_index = HvLpConfig_getLpIndex();
290 ev->event.data.vsp_cmd.result_code = 0xFF;
291 ev->event.data.vsp_cmd.reserved = 0;
292 memcpy(&(ev->event.data.vsp_cmd.sub_data),
293 &(vsp_cmd->sub_data), sizeof(vsp_cmd->sub_data));
296 rc = signal_event(ev);
298 wait_for_completion(&response.com);
304 * Send a 12-byte CE message to the primary partition VSP object
306 static int signal_ce_msg(char *ce_msg, struct ce_msg_comp_data *completion)
308 struct pending_event *ev = new_pending_event();
313 ev->event.hp_lp_event.xSubtype = 0;
314 ev->event.hp_lp_event.x.xSubtypeData =
315 subtype_data('M', 'F', 'C', 'E');
316 memcpy(ev->event.data.ce_msg.ce_msg, ce_msg, 12);
317 ev->event.data.ce_msg.completion = completion;
318 return signal_event(ev);
322 * Send a 12-byte CE message (with no data) to the primary partition VSP object
324 static int signal_ce_msg_simple(u8 ce_op, struct ce_msg_comp_data *completion)
328 memset(ce_msg, 0, sizeof(ce_msg));
330 return signal_ce_msg(ce_msg, completion);
334 * Send a 12-byte CE message and DMA data to the primary partition VSP object
336 static int dma_and_signal_ce_msg(char *ce_msg,
337 struct ce_msg_comp_data *completion, void *dma_data,
338 unsigned dma_data_length, unsigned remote_address)
340 struct pending_event *ev = new_pending_event();
345 ev->event.hp_lp_event.xSubtype = 0;
346 ev->event.hp_lp_event.x.xSubtypeData =
347 subtype_data('M', 'F', 'C', 'E');
348 memcpy(ev->event.data.ce_msg.ce_msg, ce_msg, 12);
349 ev->event.data.ce_msg.completion = completion;
350 memcpy(ev->dma_data, dma_data, dma_data_length);
351 ev->dma_data_length = dma_data_length;
352 ev->remote_address = remote_address;
353 return signal_event(ev);
357 * Initiate a nice (hopefully) shutdown of Linux. We simply are
358 * going to try and send the init process a SIGINT signal. If
359 * this fails (why?), we'll simply force it off in a not-so-nice
362 static int shutdown(void)
364 int rc = kill_cad_pid(SIGINT, 1);
367 printk(KERN_ALERT "mf.c: SIGINT to init failed (%d), "
368 "hard shutdown commencing\n", rc);
371 printk(KERN_INFO "mf.c: init has been successfully notified "
372 "to proceed with shutdown\n");
377 * The primary partition VSP object is sending us a new
378 * event flow. Handle it...
380 static void handle_int(struct io_mf_lp_event *event)
382 struct ce_msg_data *ce_msg_data;
383 struct ce_msg_data *pce_msg_data;
385 struct pending_event *pev;
387 /* ack the interrupt */
388 event->hp_lp_event.xRc = HvLpEvent_Rc_Good;
389 HvCallEvent_ackLpEvent(&event->hp_lp_event);
391 /* process interrupt */
392 switch (event->hp_lp_event.xSubtype) {
393 case 0: /* CE message */
394 ce_msg_data = &event->data.ce_msg;
395 switch (ce_msg_data->ce_msg[3]) {
396 case 0x5B: /* power control notification */
397 if ((ce_msg_data->ce_msg[5] & 0x20) != 0) {
398 printk(KERN_INFO "mf.c: Commencing partition shutdown\n");
400 signal_ce_msg_simple(0xDB, NULL);
403 case 0xC0: /* get time */
404 spin_lock_irqsave(&pending_event_spinlock, flags);
405 pev = pending_event_head;
407 pending_event_head = pending_event_head->next;
408 spin_unlock_irqrestore(&pending_event_spinlock, flags);
411 pce_msg_data = &pev->event.data.ce_msg;
412 if (pce_msg_data->ce_msg[3] != 0x40)
414 if (pce_msg_data->completion != NULL) {
415 ce_msg_comp_hdlr handler =
416 pce_msg_data->completion->handler;
417 void *token = pce_msg_data->completion->token;
420 (*handler)(token, ce_msg_data);
422 spin_lock_irqsave(&pending_event_spinlock, flags);
423 free_pending_event(pev);
424 spin_unlock_irqrestore(&pending_event_spinlock, flags);
425 /* send next waiting event */
426 if (pending_event_head != NULL)
431 case 1: /* IT sys shutdown */
432 printk(KERN_INFO "mf.c: Commencing system shutdown\n");
439 * The primary partition VSP object is acknowledging the receipt
440 * of a flow we sent to them. If there are other flows queued
441 * up, we must send another one now...
443 static void handle_ack(struct io_mf_lp_event *event)
446 struct pending_event *two = NULL;
447 unsigned long free_it = 0;
448 struct ce_msg_data *ce_msg_data;
449 struct ce_msg_data *pce_msg_data;
450 struct vsp_rsp_data *rsp;
452 /* handle current event */
453 if (pending_event_head == NULL) {
454 printk(KERN_ERR "mf.c: stack empty for receiving ack\n");
458 switch (event->hp_lp_event.xSubtype) {
460 ce_msg_data = &event->data.ce_msg;
461 if (ce_msg_data->ce_msg[3] != 0x40) {
465 if (ce_msg_data->ce_msg[2] == 0)
468 pce_msg_data = &pending_event_head->event.data.ce_msg;
469 if (pce_msg_data->completion != NULL) {
470 ce_msg_comp_hdlr handler =
471 pce_msg_data->completion->handler;
472 void *token = pce_msg_data->completion->token;
475 (*handler)(token, ce_msg_data);
478 case 4: /* allocate */
479 case 5: /* deallocate */
480 if (pending_event_head->hdlr != NULL)
481 (*pending_event_head->hdlr)((void *)event->hp_lp_event.xCorrelationToken, event->data.alloc.count);
486 rsp = (struct vsp_rsp_data *)event->data.vsp_cmd.token;
488 printk(KERN_ERR "mf.c: no rsp\n");
491 if (rsp->response != NULL)
492 memcpy(rsp->response, &event->data.vsp_cmd,
493 sizeof(event->data.vsp_cmd));
498 /* remove from queue */
499 spin_lock_irqsave(&pending_event_spinlock, flags);
500 if ((pending_event_head != NULL) && (free_it == 1)) {
501 struct pending_event *oldHead = pending_event_head;
503 pending_event_head = pending_event_head->next;
504 two = pending_event_head;
505 free_pending_event(oldHead);
507 spin_unlock_irqrestore(&pending_event_spinlock, flags);
509 /* send next waiting event */
515 * This is the generic event handler we are registering with
516 * the Hypervisor. Ensure the flows are for us, and then
517 * parse it enough to know if it is an interrupt or an
520 static void hv_handler(struct HvLpEvent *event)
522 if ((event != NULL) && (event->xType == HvLpEvent_Type_MachineFac)) {
523 if (hvlpevent_is_ack(event))
524 handle_ack((struct io_mf_lp_event *)event);
526 handle_int((struct io_mf_lp_event *)event);
528 printk(KERN_ERR "mf.c: alien event received\n");
532 * Global kernel interface to allocate and seed events into the
535 void mf_allocate_lp_events(HvLpIndex target_lp, HvLpEvent_Type type,
536 unsigned size, unsigned count, MFCompleteHandler hdlr,
539 struct pending_event *ev = new_pending_event();
545 ev->event.hp_lp_event.xSubtype = 4;
546 ev->event.hp_lp_event.xCorrelationToken = (u64)user_token;
547 ev->event.hp_lp_event.x.xSubtypeData =
548 subtype_data('M', 'F', 'M', 'A');
549 ev->event.data.alloc.target_lp = target_lp;
550 ev->event.data.alloc.type = type;
551 ev->event.data.alloc.size = size;
552 ev->event.data.alloc.count = count;
554 rc = signal_event(ev);
556 if ((rc != 0) && (hdlr != NULL))
557 (*hdlr)(user_token, rc);
559 EXPORT_SYMBOL(mf_allocate_lp_events);
562 * Global kernel interface to unseed and deallocate events already in
565 void mf_deallocate_lp_events(HvLpIndex target_lp, HvLpEvent_Type type,
566 unsigned count, MFCompleteHandler hdlr, void *user_token)
568 struct pending_event *ev = new_pending_event();
574 ev->event.hp_lp_event.xSubtype = 5;
575 ev->event.hp_lp_event.xCorrelationToken = (u64)user_token;
576 ev->event.hp_lp_event.x.xSubtypeData =
577 subtype_data('M', 'F', 'M', 'D');
578 ev->event.data.alloc.target_lp = target_lp;
579 ev->event.data.alloc.type = type;
580 ev->event.data.alloc.count = count;
582 rc = signal_event(ev);
584 if ((rc != 0) && (hdlr != NULL))
585 (*hdlr)(user_token, rc);
587 EXPORT_SYMBOL(mf_deallocate_lp_events);
590 * Global kernel interface to tell the VSP object in the primary
591 * partition to power this partition off.
593 void mf_power_off(void)
595 printk(KERN_INFO "mf.c: Down it goes...\n");
596 signal_ce_msg_simple(0x4d, NULL);
602 * Global kernel interface to tell the VSP object in the primary
603 * partition to reboot this partition.
605 void mf_reboot(char *cmd)
607 printk(KERN_INFO "mf.c: Preparing to bounce...\n");
608 signal_ce_msg_simple(0x4e, NULL);
614 * Display a single word SRC onto the VSP control panel.
616 void mf_display_src(u32 word)
620 memset(ce, 0, sizeof(ce));
627 signal_ce_msg(ce, NULL);
631 * Display a single word SRC of the form "PROGXXXX" on the VSP control panel.
633 static __init void mf_display_progress_src(u16 value)
638 memcpy(ce, "\x00\x00\x04\x4A\x00\x00\x00\x48\x00\x00\x00\x00", 12);
639 memcpy(src, "\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00"
640 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
641 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
642 "\x00\x00\x00\x00PROGxxxx ",
645 src[7] = value & 255;
646 src[44] = "0123456789ABCDEF"[(value >> 12) & 15];
647 src[45] = "0123456789ABCDEF"[(value >> 8) & 15];
648 src[46] = "0123456789ABCDEF"[(value >> 4) & 15];
649 src[47] = "0123456789ABCDEF"[value & 15];
650 dma_and_signal_ce_msg(ce, NULL, src, sizeof(src), 9 * 64 * 1024);
654 * Clear the VSP control panel. Used to "erase" an SRC that was
655 * previously displayed.
657 static void mf_clear_src(void)
659 signal_ce_msg_simple(0x4b, NULL);
662 void __init mf_display_progress(u16 value)
670 mf_display_progress_src(value);
674 * Initialization code here.
676 void __init mf_init(void)
680 spin_lock_init(&pending_event_spinlock);
682 for (i = 0; i < PENDING_EVENT_PREALLOC_LEN; i++)
683 free_pending_event(&pending_event_prealloc[i]);
685 HvLpEvent_registerHandler(HvLpEvent_Type_MachineFac, &hv_handler);
687 /* virtual continue ack */
688 signal_ce_msg_simple(0x57, NULL);
693 printk(KERN_NOTICE "mf.c: iSeries Linux LPAR Machine Facilities "
697 struct rtc_time_data {
698 struct completion com;
699 struct ce_msg_data ce_msg;
703 static void get_rtc_time_complete(void *token, struct ce_msg_data *ce_msg)
705 struct rtc_time_data *rtc = token;
707 memcpy(&rtc->ce_msg, ce_msg, sizeof(rtc->ce_msg));
712 static int mf_set_rtc(struct rtc_time *tm)
715 u8 day, mon, hour, min, sec, y1, y2;
718 year = 1900 + tm->tm_year;
726 mon = tm->tm_mon + 1;
730 hour = bin2bcd(hour);
736 memset(ce_time, 0, sizeof(ce_time));
746 return signal_ce_msg(ce_time, NULL);
749 static int rtc_set_tm(int rc, u8 *ce_msg, struct rtc_time *tm)
764 if ((ce_msg[2] == 0xa9) ||
765 (ce_msg[2] == 0xaf)) {
766 /* TOD clock is not set */
785 hour = bcd2bin(hour);
788 year = bcd2bin(year);
804 static int mf_get_rtc(struct rtc_time *tm)
806 struct ce_msg_comp_data ce_complete;
807 struct rtc_time_data rtc_data;
810 memset(&ce_complete, 0, sizeof(ce_complete));
811 memset(&rtc_data, 0, sizeof(rtc_data));
812 init_completion(&rtc_data.com);
813 ce_complete.handler = &get_rtc_time_complete;
814 ce_complete.token = &rtc_data;
815 rc = signal_ce_msg_simple(0x40, &ce_complete);
818 wait_for_completion(&rtc_data.com);
819 return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm);
822 struct boot_rtc_time_data {
824 struct ce_msg_data ce_msg;
828 static void get_boot_rtc_time_complete(void *token, struct ce_msg_data *ce_msg)
830 struct boot_rtc_time_data *rtc = token;
832 memcpy(&rtc->ce_msg, ce_msg, sizeof(rtc->ce_msg));
837 static int mf_get_boot_rtc(struct rtc_time *tm)
839 struct ce_msg_comp_data ce_complete;
840 struct boot_rtc_time_data rtc_data;
843 memset(&ce_complete, 0, sizeof(ce_complete));
844 memset(&rtc_data, 0, sizeof(rtc_data));
846 ce_complete.handler = &get_boot_rtc_time_complete;
847 ce_complete.token = &rtc_data;
848 rc = signal_ce_msg_simple(0x40, &ce_complete);
851 /* We need to poll here as we are not yet taking interrupts */
852 while (rtc_data.busy) {
853 if (hvlpevent_is_pending())
854 process_hvlpevents();
856 return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm);
859 #ifdef CONFIG_PROC_FS
860 static int mf_cmdline_proc_show(struct seq_file *m, void *v)
863 struct vsp_cmd_data vsp_cmd;
867 /* The HV appears to return no more than 256 bytes of command line */
868 page = kmalloc(256, GFP_KERNEL);
872 dma_addr = iseries_hv_map(page, 256, DMA_FROM_DEVICE);
873 if (dma_addr == DMA_ERROR_CODE) {
877 memset(page, 0, 256);
878 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
880 vsp_cmd.sub_data.kern.token = dma_addr;
881 vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex;
882 vsp_cmd.sub_data.kern.side = (u64)m->private;
883 vsp_cmd.sub_data.kern.length = 256;
885 rc = signal_vsp_instruction(&vsp_cmd);
886 iseries_hv_unmap(dma_addr, 256, DMA_FROM_DEVICE);
891 if (vsp_cmd.result_code != 0) {
896 while (p - page < 256) {
897 if (*p == '\0' || *p == '\n') {
904 seq_write(m, page, p - page);
909 static int mf_cmdline_proc_open(struct inode *inode, struct file *file)
911 return single_open(file, mf_cmdline_proc_show, PDE(inode)->data);
915 static int mf_getVmlinuxChunk(char *buffer, int *size, int offset, u64 side)
917 struct vsp_cmd_data vsp_cmd;
922 dma_addr = iseries_hv_map(buffer, len, DMA_FROM_DEVICE);
923 memset(buffer, 0, len);
924 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
926 vsp_cmd.sub_data.kern.token = dma_addr;
927 vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex;
928 vsp_cmd.sub_data.kern.side = side;
929 vsp_cmd.sub_data.kern.offset = offset;
930 vsp_cmd.sub_data.kern.length = len;
932 rc = signal_vsp_instruction(&vsp_cmd);
934 if (vsp_cmd.result_code == 0)
935 *size = vsp_cmd.sub_data.length_out;
940 iseries_hv_unmap(dma_addr, len, DMA_FROM_DEVICE);
945 static int proc_mf_dump_vmlinux(char *page, char **start, off_t off,
946 int count, int *eof, void *data)
948 int sizeToGet = count;
950 if (!capable(CAP_SYS_ADMIN))
953 if (mf_getVmlinuxChunk(page, &sizeToGet, off, (u64)data) == 0) {
954 if (sizeToGet != 0) {
966 static int mf_side_proc_show(struct seq_file *m, void *v)
968 char mf_current_side = ' ';
969 struct vsp_cmd_data vsp_cmd;
971 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
973 vsp_cmd.sub_data.ipl_type = 0;
976 if (signal_vsp_instruction(&vsp_cmd) == 0) {
977 if (vsp_cmd.result_code == 0) {
978 switch (vsp_cmd.sub_data.ipl_type) {
979 case 0: mf_current_side = 'A';
981 case 1: mf_current_side = 'B';
983 case 2: mf_current_side = 'C';
985 default: mf_current_side = 'D';
991 seq_printf(m, "%c\n", mf_current_side);
995 static int mf_side_proc_open(struct inode *inode, struct file *file)
997 return single_open(file, mf_side_proc_show, NULL);
1000 static ssize_t mf_side_proc_write(struct file *file, const char __user *buffer,
1001 size_t count, loff_t *pos)
1005 struct vsp_cmd_data vsp_cmd;
1007 if (!capable(CAP_SYS_ADMIN))
1013 if (get_user(side, buffer))
1017 case 'A': newSide = 0;
1019 case 'B': newSide = 1;
1021 case 'C': newSide = 2;
1023 case 'D': newSide = 3;
1026 printk(KERN_ERR "mf_proc.c: proc_mf_change_side: invalid side\n");
1030 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
1031 vsp_cmd.sub_data.ipl_type = newSide;
1034 (void)signal_vsp_instruction(&vsp_cmd);
1039 static const struct file_operations mf_side_proc_fops = {
1040 .owner = THIS_MODULE,
1041 .open = mf_side_proc_open,
1043 .llseek = seq_lseek,
1044 .release = single_release,
1045 .write = mf_side_proc_write,
1049 static void mf_getSrcHistory(char *buffer, int size)
1051 struct IplTypeReturnStuff return_stuff;
1052 struct pending_event *ev = new_pending_event();
1056 pages[0] = kmalloc(4096, GFP_ATOMIC);
1057 pages[1] = kmalloc(4096, GFP_ATOMIC);
1058 pages[2] = kmalloc(4096, GFP_ATOMIC);
1059 pages[3] = kmalloc(4096, GFP_ATOMIC);
1060 if ((ev == NULL) || (pages[0] == NULL) || (pages[1] == NULL)
1061 || (pages[2] == NULL) || (pages[3] == NULL))
1064 return_stuff.xType = 0;
1065 return_stuff.xRc = 0;
1066 return_stuff.xDone = 0;
1067 ev->event.hp_lp_event.xSubtype = 6;
1068 ev->event.hp_lp_event.x.xSubtypeData =
1069 subtype_data('M', 'F', 'V', 'I');
1070 ev->event.data.vsp_cmd.xEvent = &return_stuff;
1071 ev->event.data.vsp_cmd.cmd = 4;
1072 ev->event.data.vsp_cmd.lp_index = HvLpConfig_getLpIndex();
1073 ev->event.data.vsp_cmd.result_code = 0xFF;
1074 ev->event.data.vsp_cmd.reserved = 0;
1075 ev->event.data.vsp_cmd.sub_data.page[0] = iseries_hv_addr(pages[0]);
1076 ev->event.data.vsp_cmd.sub_data.page[1] = iseries_hv_addr(pages[1]);
1077 ev->event.data.vsp_cmd.sub_data.page[2] = iseries_hv_addr(pages[2]);
1078 ev->event.data.vsp_cmd.sub_data.page[3] = iseries_hv_addr(pages[3]);
1080 if (signal_event(ev) != 0)
1083 while (return_stuff.xDone != 1)
1085 if (return_stuff.xRc == 0)
1086 memcpy(buffer, pages[0], size);
1094 static int mf_src_proc_show(struct seq_file *m, void *v)
1099 mf_getSrcHistory(page, count);
1108 *start = page + off;
1115 static int mf_src_proc_open(struct inode *inode, struct file *file)
1117 return single_open(file, mf_src_proc_show, NULL);
1120 static ssize_t mf_src_proc_write(struct file *file, const char __user *buffer,
1121 size_t count, loff_t *pos)
1125 if (!capable(CAP_SYS_ADMIN))
1128 if ((count < 4) && (count != 1)) {
1129 printk(KERN_ERR "mf_proc: invalid src\n");
1133 if (count > (sizeof(stkbuf) - 1))
1134 count = sizeof(stkbuf) - 1;
1135 if (copy_from_user(stkbuf, buffer, count))
1138 if ((count == 1) && (*stkbuf == '\0'))
1141 mf_display_src(*(u32 *)stkbuf);
1146 static const struct file_operations mf_src_proc_fops = {
1147 .owner = THIS_MODULE,
1148 .open = mf_src_proc_open,
1150 .llseek = seq_lseek,
1151 .release = single_release,
1152 .write = mf_src_proc_write,
1155 static ssize_t mf_cmdline_proc_write(struct file *file, const char __user *buffer,
1156 size_t count, loff_t *pos)
1158 void *data = PDE(file->f_path.dentry->d_inode)->data;
1159 struct vsp_cmd_data vsp_cmd;
1160 dma_addr_t dma_addr;
1164 if (!capable(CAP_SYS_ADMIN))
1168 page = iseries_hv_alloc(count, &dma_addr, GFP_ATOMIC);
1174 if (copy_from_user(page, buffer, count))
1177 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
1179 vsp_cmd.sub_data.kern.token = dma_addr;
1180 vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex;
1181 vsp_cmd.sub_data.kern.side = (u64)data;
1182 vsp_cmd.sub_data.kern.length = count;
1184 (void)signal_vsp_instruction(&vsp_cmd);
1188 iseries_hv_free(count, page, dma_addr);
1193 static const struct file_operations mf_cmdline_proc_fops = {
1194 .owner = THIS_MODULE,
1195 .open = mf_cmdline_proc_open,
1197 .llseek = seq_lseek,
1198 .release = single_release,
1199 .write = mf_cmdline_proc_write,
1202 static ssize_t proc_mf_change_vmlinux(struct file *file,
1203 const char __user *buf,
1204 size_t count, loff_t *ppos)
1206 struct proc_dir_entry *dp = PDE(file->f_path.dentry->d_inode);
1208 dma_addr_t dma_addr;
1210 struct vsp_cmd_data vsp_cmd;
1213 if (!capable(CAP_SYS_ADMIN))
1217 page = iseries_hv_alloc(count, &dma_addr, GFP_ATOMIC);
1220 printk(KERN_ERR "mf.c: couldn't allocate memory to set vmlinux chunk\n");
1224 if (copy_from_user(page, buf, count))
1227 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
1229 vsp_cmd.sub_data.kern.token = dma_addr;
1230 vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex;
1231 vsp_cmd.sub_data.kern.side = (u64)dp->data;
1232 vsp_cmd.sub_data.kern.offset = *ppos;
1233 vsp_cmd.sub_data.kern.length = count;
1235 rc = signal_vsp_instruction(&vsp_cmd);
1239 if (vsp_cmd.result_code != 0)
1245 iseries_hv_free(count, page, dma_addr);
1250 static const struct file_operations proc_vmlinux_operations = {
1251 .write = proc_mf_change_vmlinux,
1254 static int __init mf_proc_init(void)
1256 struct proc_dir_entry *mf_proc_root;
1257 struct proc_dir_entry *ent;
1258 struct proc_dir_entry *mf;
1262 if (!firmware_has_feature(FW_FEATURE_ISERIES))
1265 mf_proc_root = proc_mkdir("iSeries/mf", NULL);
1270 for (i = 0; i < 4; i++) {
1272 mf = proc_mkdir(name, mf_proc_root);
1276 ent = proc_create_data("cmdline", S_IRUSR|S_IWUSR, mf,
1277 &mf_cmdline_proc_fops, (void *)(long)i);
1281 if (i == 3) /* no vmlinux entry for 'D' */
1284 ent = proc_create_data("vmlinux", S_IFREG|S_IWUSR, mf,
1285 &proc_vmlinux_operations,
1291 ent = proc_create("side", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root,
1292 &mf_side_proc_fops);
1296 ent = proc_create("src", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root,
1304 __initcall(mf_proc_init);
1306 #endif /* CONFIG_PROC_FS */
1309 * Get the RTC from the virtual service processor
1310 * This requires flowing LpEvents to the primary partition
1312 void iSeries_get_rtc_time(struct rtc_time *rtc_tm)
1319 * Set the RTC in the virtual service processor
1320 * This requires flowing LpEvents to the primary partition
1322 int iSeries_set_rtc_time(struct rtc_time *tm)
1328 unsigned long iSeries_get_boot_time(void)
1332 mf_get_boot_rtc(&tm);
1333 return mktime(tm.tm_year + 1900, tm.tm_mon, tm.tm_mday,
1334 tm.tm_hour, tm.tm_min, tm.tm_sec);