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/dma-mapping.h>
34 #include <linux/bcd.h>
35 #include <linux/rtc.h>
36 #include <linux/slab.h>
39 #include <asm/uaccess.h>
41 #include <asm/abs_addr.h>
42 #include <asm/firmware.h>
43 #include <asm/iseries/mf.h>
44 #include <asm/iseries/hv_lp_config.h>
45 #include <asm/iseries/hv_lp_event.h>
46 #include <asm/iseries/it_lp_queue.h>
50 static int mf_initialized;
53 * This is the structure layout for the Machine Facilites LPAR event
63 u64 state; /* GetStateOut */
64 u64 ipl_type; /* GetIplTypeOut, Function02SelectIplTypeIn */
65 u64 ipl_mode; /* GetIplModeOut, Function02SelectIplModeIn */
66 u64 page[4]; /* GetSrcHistoryIn */
67 u64 flag; /* GetAutoIplWhenPrimaryIplsOut,
68 SetAutoIplWhenPrimaryIplsIn,
69 WhiteButtonPowerOffIn,
70 Function08FastPowerOffIn,
71 IsSpcnRackPowerIncompleteOut */
78 } kern; /* SetKernelImageIn, GetKernelImageIn,
79 SetKernelCmdLineIn, GetKernelCmdLineIn */
80 u32 length_out; /* GetKernelImageOut, GetKernelCmdLineOut */
86 struct completion com;
87 struct vsp_cmd_data *response;
101 typedef void (*ce_msg_comp_hdlr)(void *token, struct ce_msg_data *vsp_cmd_rsp);
103 struct ce_msg_comp_data {
104 ce_msg_comp_hdlr handler;
111 struct ce_msg_comp_data *completion;
114 struct io_mf_lp_event {
115 struct HvLpEvent hp_lp_event;
116 u16 subtype_result_code;
120 struct alloc_data alloc;
121 struct ce_msg_data ce_msg;
122 struct vsp_cmd_data vsp_cmd;
126 #define subtype_data(a, b, c, d) \
127 (((a) << 24) + ((b) << 16) + ((c) << 8) + (d))
130 * All outgoing event traffic is kept on a FIFO queue. The first
131 * pointer points to the one that is outstanding, and all new
132 * requests get stuck on the end. Also, we keep a certain number of
133 * preallocated pending events so that we can operate very early in
134 * the boot up sequence (before kmalloc is ready).
136 struct pending_event {
137 struct pending_event *next;
138 struct io_mf_lp_event event;
139 MFCompleteHandler hdlr;
141 unsigned dma_data_length;
142 unsigned remote_address;
144 static spinlock_t pending_event_spinlock;
145 static struct pending_event *pending_event_head;
146 static struct pending_event *pending_event_tail;
147 static struct pending_event *pending_event_avail;
148 #define PENDING_EVENT_PREALLOC_LEN 16
149 static struct pending_event pending_event_prealloc[PENDING_EVENT_PREALLOC_LEN];
152 * Put a pending event onto the available queue, so it can get reused.
153 * Attention! You must have the pending_event_spinlock before calling!
155 static void free_pending_event(struct pending_event *ev)
158 ev->next = pending_event_avail;
159 pending_event_avail = ev;
164 * Enqueue the outbound event onto the stack. If the queue was
165 * empty to begin with, we must also issue it via the Hypervisor
166 * interface. There is a section of code below that will touch
167 * the first stack pointer without the protection of the pending_event_spinlock.
168 * This is OK, because we know that nobody else will be modifying
169 * the first pointer when we do this.
171 static int signal_event(struct pending_event *ev)
176 struct pending_event *ev1;
179 /* enqueue the event */
182 spin_lock_irqsave(&pending_event_spinlock, flags);
183 if (pending_event_head == NULL)
184 pending_event_head = ev;
187 pending_event_tail->next = ev;
189 pending_event_tail = ev;
190 spin_unlock_irqrestore(&pending_event_spinlock, flags);
197 /* any DMA data to send beforehand? */
198 if (pending_event_head->dma_data_length > 0)
199 HvCallEvent_dmaToSp(pending_event_head->dma_data,
200 pending_event_head->remote_address,
201 pending_event_head->dma_data_length,
202 HvLpDma_Direction_LocalToRemote);
204 hv_rc = HvCallEvent_signalLpEvent(
205 &pending_event_head->event.hp_lp_event);
206 if (hv_rc != HvLpEvent_Rc_Good) {
207 printk(KERN_ERR "mf.c: HvCallEvent_signalLpEvent() "
208 "failed with %d\n", (int)hv_rc);
210 spin_lock_irqsave(&pending_event_spinlock, flags);
211 ev1 = pending_event_head;
212 pending_event_head = pending_event_head->next;
213 if (pending_event_head != NULL)
215 spin_unlock_irqrestore(&pending_event_spinlock, flags);
219 else if (ev1->hdlr != NULL)
220 (*ev1->hdlr)((void *)ev1->event.hp_lp_event.xCorrelationToken, -EIO);
222 spin_lock_irqsave(&pending_event_spinlock, flags);
223 free_pending_event(ev1);
224 spin_unlock_irqrestore(&pending_event_spinlock, flags);
232 * Allocate a new pending_event structure, and initialize it.
234 static struct pending_event *new_pending_event(void)
236 struct pending_event *ev = NULL;
237 HvLpIndex primary_lp = HvLpConfig_getPrimaryLpIndex();
239 struct HvLpEvent *hev;
241 spin_lock_irqsave(&pending_event_spinlock, flags);
242 if (pending_event_avail != NULL) {
243 ev = pending_event_avail;
244 pending_event_avail = pending_event_avail->next;
246 spin_unlock_irqrestore(&pending_event_spinlock, flags);
248 ev = kmalloc(sizeof(struct pending_event), GFP_ATOMIC);
250 printk(KERN_ERR "mf.c: unable to kmalloc %ld bytes\n",
251 sizeof(struct pending_event));
255 memset(ev, 0, sizeof(struct pending_event));
256 hev = &ev->event.hp_lp_event;
257 hev->flags = HV_LP_EVENT_VALID | HV_LP_EVENT_DO_ACK | HV_LP_EVENT_INT;
258 hev->xType = HvLpEvent_Type_MachineFac;
259 hev->xSourceLp = HvLpConfig_getLpIndex();
260 hev->xTargetLp = primary_lp;
261 hev->xSizeMinus1 = sizeof(ev->event) - 1;
262 hev->xRc = HvLpEvent_Rc_Good;
263 hev->xSourceInstanceId = HvCallEvent_getSourceLpInstanceId(primary_lp,
264 HvLpEvent_Type_MachineFac);
265 hev->xTargetInstanceId = HvCallEvent_getTargetLpInstanceId(primary_lp,
266 HvLpEvent_Type_MachineFac);
271 static int __maybe_unused
272 signal_vsp_instruction(struct vsp_cmd_data *vsp_cmd)
274 struct pending_event *ev = new_pending_event();
276 struct vsp_rsp_data response;
281 init_completion(&response.com);
282 response.response = vsp_cmd;
283 ev->event.hp_lp_event.xSubtype = 6;
284 ev->event.hp_lp_event.x.xSubtypeData =
285 subtype_data('M', 'F', 'V', 'I');
286 ev->event.data.vsp_cmd.token = (u64)&response;
287 ev->event.data.vsp_cmd.cmd = vsp_cmd->cmd;
288 ev->event.data.vsp_cmd.lp_index = HvLpConfig_getLpIndex();
289 ev->event.data.vsp_cmd.result_code = 0xFF;
290 ev->event.data.vsp_cmd.reserved = 0;
291 memcpy(&(ev->event.data.vsp_cmd.sub_data),
292 &(vsp_cmd->sub_data), sizeof(vsp_cmd->sub_data));
295 rc = signal_event(ev);
297 wait_for_completion(&response.com);
303 * Send a 12-byte CE message to the primary partition VSP object
305 static int signal_ce_msg(char *ce_msg, struct ce_msg_comp_data *completion)
307 struct pending_event *ev = new_pending_event();
312 ev->event.hp_lp_event.xSubtype = 0;
313 ev->event.hp_lp_event.x.xSubtypeData =
314 subtype_data('M', 'F', 'C', 'E');
315 memcpy(ev->event.data.ce_msg.ce_msg, ce_msg, 12);
316 ev->event.data.ce_msg.completion = completion;
317 return signal_event(ev);
321 * Send a 12-byte CE message (with no data) to the primary partition VSP object
323 static int signal_ce_msg_simple(u8 ce_op, struct ce_msg_comp_data *completion)
327 memset(ce_msg, 0, sizeof(ce_msg));
329 return signal_ce_msg(ce_msg, completion);
333 * Send a 12-byte CE message and DMA data to the primary partition VSP object
335 static int dma_and_signal_ce_msg(char *ce_msg,
336 struct ce_msg_comp_data *completion, void *dma_data,
337 unsigned dma_data_length, unsigned remote_address)
339 struct pending_event *ev = new_pending_event();
344 ev->event.hp_lp_event.xSubtype = 0;
345 ev->event.hp_lp_event.x.xSubtypeData =
346 subtype_data('M', 'F', 'C', 'E');
347 memcpy(ev->event.data.ce_msg.ce_msg, ce_msg, 12);
348 ev->event.data.ce_msg.completion = completion;
349 memcpy(ev->dma_data, dma_data, dma_data_length);
350 ev->dma_data_length = dma_data_length;
351 ev->remote_address = remote_address;
352 return signal_event(ev);
356 * Initiate a nice (hopefully) shutdown of Linux. We simply are
357 * going to try and send the init process a SIGINT signal. If
358 * this fails (why?), we'll simply force it off in a not-so-nice
361 static int shutdown(void)
363 int rc = kill_cad_pid(SIGINT, 1);
366 printk(KERN_ALERT "mf.c: SIGINT to init failed (%d), "
367 "hard shutdown commencing\n", rc);
370 printk(KERN_INFO "mf.c: init has been successfully notified "
371 "to proceed with shutdown\n");
376 * The primary partition VSP object is sending us a new
377 * event flow. Handle it...
379 static void handle_int(struct io_mf_lp_event *event)
381 struct ce_msg_data *ce_msg_data;
382 struct ce_msg_data *pce_msg_data;
384 struct pending_event *pev;
386 /* ack the interrupt */
387 event->hp_lp_event.xRc = HvLpEvent_Rc_Good;
388 HvCallEvent_ackLpEvent(&event->hp_lp_event);
390 /* process interrupt */
391 switch (event->hp_lp_event.xSubtype) {
392 case 0: /* CE message */
393 ce_msg_data = &event->data.ce_msg;
394 switch (ce_msg_data->ce_msg[3]) {
395 case 0x5B: /* power control notification */
396 if ((ce_msg_data->ce_msg[5] & 0x20) != 0) {
397 printk(KERN_INFO "mf.c: Commencing partition shutdown\n");
399 signal_ce_msg_simple(0xDB, NULL);
402 case 0xC0: /* get time */
403 spin_lock_irqsave(&pending_event_spinlock, flags);
404 pev = pending_event_head;
406 pending_event_head = pending_event_head->next;
407 spin_unlock_irqrestore(&pending_event_spinlock, flags);
410 pce_msg_data = &pev->event.data.ce_msg;
411 if (pce_msg_data->ce_msg[3] != 0x40)
413 if (pce_msg_data->completion != NULL) {
414 ce_msg_comp_hdlr handler =
415 pce_msg_data->completion->handler;
416 void *token = pce_msg_data->completion->token;
419 (*handler)(token, ce_msg_data);
421 spin_lock_irqsave(&pending_event_spinlock, flags);
422 free_pending_event(pev);
423 spin_unlock_irqrestore(&pending_event_spinlock, flags);
424 /* send next waiting event */
425 if (pending_event_head != NULL)
430 case 1: /* IT sys shutdown */
431 printk(KERN_INFO "mf.c: Commencing system shutdown\n");
438 * The primary partition VSP object is acknowledging the receipt
439 * of a flow we sent to them. If there are other flows queued
440 * up, we must send another one now...
442 static void handle_ack(struct io_mf_lp_event *event)
445 struct pending_event *two = NULL;
446 unsigned long free_it = 0;
447 struct ce_msg_data *ce_msg_data;
448 struct ce_msg_data *pce_msg_data;
449 struct vsp_rsp_data *rsp;
451 /* handle current event */
452 if (pending_event_head == NULL) {
453 printk(KERN_ERR "mf.c: stack empty for receiving ack\n");
457 switch (event->hp_lp_event.xSubtype) {
459 ce_msg_data = &event->data.ce_msg;
460 if (ce_msg_data->ce_msg[3] != 0x40) {
464 if (ce_msg_data->ce_msg[2] == 0)
467 pce_msg_data = &pending_event_head->event.data.ce_msg;
468 if (pce_msg_data->completion != NULL) {
469 ce_msg_comp_hdlr handler =
470 pce_msg_data->completion->handler;
471 void *token = pce_msg_data->completion->token;
474 (*handler)(token, ce_msg_data);
477 case 4: /* allocate */
478 case 5: /* deallocate */
479 if (pending_event_head->hdlr != NULL)
480 (*pending_event_head->hdlr)((void *)event->hp_lp_event.xCorrelationToken, event->data.alloc.count);
485 rsp = (struct vsp_rsp_data *)event->data.vsp_cmd.token;
487 printk(KERN_ERR "mf.c: no rsp\n");
490 if (rsp->response != NULL)
491 memcpy(rsp->response, &event->data.vsp_cmd,
492 sizeof(event->data.vsp_cmd));
497 /* remove from queue */
498 spin_lock_irqsave(&pending_event_spinlock, flags);
499 if ((pending_event_head != NULL) && (free_it == 1)) {
500 struct pending_event *oldHead = pending_event_head;
502 pending_event_head = pending_event_head->next;
503 two = pending_event_head;
504 free_pending_event(oldHead);
506 spin_unlock_irqrestore(&pending_event_spinlock, flags);
508 /* send next waiting event */
514 * This is the generic event handler we are registering with
515 * the Hypervisor. Ensure the flows are for us, and then
516 * parse it enough to know if it is an interrupt or an
519 static void hv_handler(struct HvLpEvent *event)
521 if ((event != NULL) && (event->xType == HvLpEvent_Type_MachineFac)) {
522 if (hvlpevent_is_ack(event))
523 handle_ack((struct io_mf_lp_event *)event);
525 handle_int((struct io_mf_lp_event *)event);
527 printk(KERN_ERR "mf.c: alien event received\n");
531 * Global kernel interface to allocate and seed events into the
534 void mf_allocate_lp_events(HvLpIndex target_lp, HvLpEvent_Type type,
535 unsigned size, unsigned count, MFCompleteHandler hdlr,
538 struct pending_event *ev = new_pending_event();
544 ev->event.hp_lp_event.xSubtype = 4;
545 ev->event.hp_lp_event.xCorrelationToken = (u64)user_token;
546 ev->event.hp_lp_event.x.xSubtypeData =
547 subtype_data('M', 'F', 'M', 'A');
548 ev->event.data.alloc.target_lp = target_lp;
549 ev->event.data.alloc.type = type;
550 ev->event.data.alloc.size = size;
551 ev->event.data.alloc.count = count;
553 rc = signal_event(ev);
555 if ((rc != 0) && (hdlr != NULL))
556 (*hdlr)(user_token, rc);
558 EXPORT_SYMBOL(mf_allocate_lp_events);
561 * Global kernel interface to unseed and deallocate events already in
564 void mf_deallocate_lp_events(HvLpIndex target_lp, HvLpEvent_Type type,
565 unsigned count, MFCompleteHandler hdlr, void *user_token)
567 struct pending_event *ev = new_pending_event();
573 ev->event.hp_lp_event.xSubtype = 5;
574 ev->event.hp_lp_event.xCorrelationToken = (u64)user_token;
575 ev->event.hp_lp_event.x.xSubtypeData =
576 subtype_data('M', 'F', 'M', 'D');
577 ev->event.data.alloc.target_lp = target_lp;
578 ev->event.data.alloc.type = type;
579 ev->event.data.alloc.count = count;
581 rc = signal_event(ev);
583 if ((rc != 0) && (hdlr != NULL))
584 (*hdlr)(user_token, rc);
586 EXPORT_SYMBOL(mf_deallocate_lp_events);
589 * Global kernel interface to tell the VSP object in the primary
590 * partition to power this partition off.
592 void mf_power_off(void)
594 printk(KERN_INFO "mf.c: Down it goes...\n");
595 signal_ce_msg_simple(0x4d, NULL);
601 * Global kernel interface to tell the VSP object in the primary
602 * partition to reboot this partition.
604 void mf_reboot(char *cmd)
606 printk(KERN_INFO "mf.c: Preparing to bounce...\n");
607 signal_ce_msg_simple(0x4e, NULL);
613 * Display a single word SRC onto the VSP control panel.
615 void mf_display_src(u32 word)
619 memset(ce, 0, sizeof(ce));
626 signal_ce_msg(ce, NULL);
630 * Display a single word SRC of the form "PROGXXXX" on the VSP control panel.
632 static __init void mf_display_progress_src(u16 value)
637 memcpy(ce, "\x00\x00\x04\x4A\x00\x00\x00\x48\x00\x00\x00\x00", 12);
638 memcpy(src, "\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00"
639 "\x00\x00\x00\x00\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\x00PROGxxxx ",
644 src[7] = value & 255;
645 src[44] = "0123456789ABCDEF"[(value >> 12) & 15];
646 src[45] = "0123456789ABCDEF"[(value >> 8) & 15];
647 src[46] = "0123456789ABCDEF"[(value >> 4) & 15];
648 src[47] = "0123456789ABCDEF"[value & 15];
649 dma_and_signal_ce_msg(ce, NULL, src, sizeof(src), 9 * 64 * 1024);
653 * Clear the VSP control panel. Used to "erase" an SRC that was
654 * previously displayed.
656 static void mf_clear_src(void)
658 signal_ce_msg_simple(0x4b, NULL);
661 void __init mf_display_progress(u16 value)
669 mf_display_progress_src(value);
673 * Initialization code here.
675 void __init mf_init(void)
679 spin_lock_init(&pending_event_spinlock);
681 for (i = 0; i < PENDING_EVENT_PREALLOC_LEN; i++)
682 free_pending_event(&pending_event_prealloc[i]);
684 HvLpEvent_registerHandler(HvLpEvent_Type_MachineFac, &hv_handler);
686 /* virtual continue ack */
687 signal_ce_msg_simple(0x57, NULL);
692 printk(KERN_NOTICE "mf.c: iSeries Linux LPAR Machine Facilities "
696 struct rtc_time_data {
697 struct completion com;
698 struct ce_msg_data ce_msg;
702 static void get_rtc_time_complete(void *token, struct ce_msg_data *ce_msg)
704 struct rtc_time_data *rtc = token;
706 memcpy(&rtc->ce_msg, ce_msg, sizeof(rtc->ce_msg));
711 static int mf_set_rtc(struct rtc_time *tm)
714 u8 day, mon, hour, min, sec, y1, y2;
717 year = 1900 + tm->tm_year;
725 mon = tm->tm_mon + 1;
729 hour = bin2bcd(hour);
735 memset(ce_time, 0, sizeof(ce_time));
745 return signal_ce_msg(ce_time, NULL);
748 static int rtc_set_tm(int rc, u8 *ce_msg, struct rtc_time *tm)
763 if ((ce_msg[2] == 0xa9) ||
764 (ce_msg[2] == 0xaf)) {
765 /* TOD clock is not set */
784 hour = bcd2bin(hour);
787 year = bcd2bin(year);
803 static int mf_get_rtc(struct rtc_time *tm)
805 struct ce_msg_comp_data ce_complete;
806 struct rtc_time_data rtc_data;
809 memset(&ce_complete, 0, sizeof(ce_complete));
810 memset(&rtc_data, 0, sizeof(rtc_data));
811 init_completion(&rtc_data.com);
812 ce_complete.handler = &get_rtc_time_complete;
813 ce_complete.token = &rtc_data;
814 rc = signal_ce_msg_simple(0x40, &ce_complete);
817 wait_for_completion(&rtc_data.com);
818 return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm);
821 struct boot_rtc_time_data {
823 struct ce_msg_data ce_msg;
827 static void get_boot_rtc_time_complete(void *token, struct ce_msg_data *ce_msg)
829 struct boot_rtc_time_data *rtc = token;
831 memcpy(&rtc->ce_msg, ce_msg, sizeof(rtc->ce_msg));
836 static int mf_get_boot_rtc(struct rtc_time *tm)
838 struct ce_msg_comp_data ce_complete;
839 struct boot_rtc_time_data rtc_data;
842 memset(&ce_complete, 0, sizeof(ce_complete));
843 memset(&rtc_data, 0, sizeof(rtc_data));
845 ce_complete.handler = &get_boot_rtc_time_complete;
846 ce_complete.token = &rtc_data;
847 rc = signal_ce_msg_simple(0x40, &ce_complete);
850 /* We need to poll here as we are not yet taking interrupts */
851 while (rtc_data.busy) {
852 if (hvlpevent_is_pending())
853 process_hvlpevents();
855 return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm);
858 #ifdef CONFIG_PROC_FS
859 static int mf_cmdline_proc_show(struct seq_file *m, void *v)
862 struct vsp_cmd_data vsp_cmd;
866 /* The HV appears to return no more than 256 bytes of command line */
867 page = kmalloc(256, GFP_KERNEL);
871 dma_addr = iseries_hv_map(page, 256, DMA_FROM_DEVICE);
872 if (dma_addr == DMA_ERROR_CODE) {
876 memset(page, 0, 256);
877 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
879 vsp_cmd.sub_data.kern.token = dma_addr;
880 vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex;
881 vsp_cmd.sub_data.kern.side = (u64)m->private;
882 vsp_cmd.sub_data.kern.length = 256;
884 rc = signal_vsp_instruction(&vsp_cmd);
885 iseries_hv_unmap(dma_addr, 256, DMA_FROM_DEVICE);
890 if (vsp_cmd.result_code != 0) {
895 while (p - page < 256) {
896 if (*p == '\0' || *p == '\n') {
903 seq_write(m, page, p - page);
908 static int mf_cmdline_proc_open(struct inode *inode, struct file *file)
910 return single_open(file, mf_cmdline_proc_show, PDE(inode)->data);
914 static int mf_getVmlinuxChunk(char *buffer, int *size, int offset, u64 side)
916 struct vsp_cmd_data vsp_cmd;
921 dma_addr = iseries_hv_map(buffer, len, DMA_FROM_DEVICE);
922 memset(buffer, 0, len);
923 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
925 vsp_cmd.sub_data.kern.token = dma_addr;
926 vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex;
927 vsp_cmd.sub_data.kern.side = side;
928 vsp_cmd.sub_data.kern.offset = offset;
929 vsp_cmd.sub_data.kern.length = len;
931 rc = signal_vsp_instruction(&vsp_cmd);
933 if (vsp_cmd.result_code == 0)
934 *size = vsp_cmd.sub_data.length_out;
939 iseries_hv_unmap(dma_addr, len, DMA_FROM_DEVICE);
944 static int proc_mf_dump_vmlinux(char *page, char **start, off_t off,
945 int count, int *eof, void *data)
947 int sizeToGet = count;
949 if (!capable(CAP_SYS_ADMIN))
952 if (mf_getVmlinuxChunk(page, &sizeToGet, off, (u64)data) == 0) {
953 if (sizeToGet != 0) {
965 static int mf_side_proc_show(struct seq_file *m, void *v)
967 char mf_current_side = ' ';
968 struct vsp_cmd_data vsp_cmd;
970 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
972 vsp_cmd.sub_data.ipl_type = 0;
975 if (signal_vsp_instruction(&vsp_cmd) == 0) {
976 if (vsp_cmd.result_code == 0) {
977 switch (vsp_cmd.sub_data.ipl_type) {
978 case 0: mf_current_side = 'A';
980 case 1: mf_current_side = 'B';
982 case 2: mf_current_side = 'C';
984 default: mf_current_side = 'D';
990 seq_printf(m, "%c\n", mf_current_side);
994 static int mf_side_proc_open(struct inode *inode, struct file *file)
996 return single_open(file, mf_side_proc_show, NULL);
999 static ssize_t mf_side_proc_write(struct file *file, const char __user *buffer,
1000 size_t count, loff_t *pos)
1004 struct vsp_cmd_data vsp_cmd;
1006 if (!capable(CAP_SYS_ADMIN))
1012 if (get_user(side, buffer))
1016 case 'A': newSide = 0;
1018 case 'B': newSide = 1;
1020 case 'C': newSide = 2;
1022 case 'D': newSide = 3;
1025 printk(KERN_ERR "mf_proc.c: proc_mf_change_side: invalid side\n");
1029 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
1030 vsp_cmd.sub_data.ipl_type = newSide;
1033 (void)signal_vsp_instruction(&vsp_cmd);
1038 static const struct file_operations mf_side_proc_fops = {
1039 .owner = THIS_MODULE,
1040 .open = mf_side_proc_open,
1042 .llseek = seq_lseek,
1043 .release = single_release,
1044 .write = mf_side_proc_write,
1048 static void mf_getSrcHistory(char *buffer, int size)
1050 struct IplTypeReturnStuff return_stuff;
1051 struct pending_event *ev = new_pending_event();
1055 pages[0] = kmalloc(4096, GFP_ATOMIC);
1056 pages[1] = kmalloc(4096, GFP_ATOMIC);
1057 pages[2] = kmalloc(4096, GFP_ATOMIC);
1058 pages[3] = kmalloc(4096, GFP_ATOMIC);
1059 if ((ev == NULL) || (pages[0] == NULL) || (pages[1] == NULL)
1060 || (pages[2] == NULL) || (pages[3] == NULL))
1063 return_stuff.xType = 0;
1064 return_stuff.xRc = 0;
1065 return_stuff.xDone = 0;
1066 ev->event.hp_lp_event.xSubtype = 6;
1067 ev->event.hp_lp_event.x.xSubtypeData =
1068 subtype_data('M', 'F', 'V', 'I');
1069 ev->event.data.vsp_cmd.xEvent = &return_stuff;
1070 ev->event.data.vsp_cmd.cmd = 4;
1071 ev->event.data.vsp_cmd.lp_index = HvLpConfig_getLpIndex();
1072 ev->event.data.vsp_cmd.result_code = 0xFF;
1073 ev->event.data.vsp_cmd.reserved = 0;
1074 ev->event.data.vsp_cmd.sub_data.page[0] = iseries_hv_addr(pages[0]);
1075 ev->event.data.vsp_cmd.sub_data.page[1] = iseries_hv_addr(pages[1]);
1076 ev->event.data.vsp_cmd.sub_data.page[2] = iseries_hv_addr(pages[2]);
1077 ev->event.data.vsp_cmd.sub_data.page[3] = iseries_hv_addr(pages[3]);
1079 if (signal_event(ev) != 0)
1082 while (return_stuff.xDone != 1)
1084 if (return_stuff.xRc == 0)
1085 memcpy(buffer, pages[0], size);
1093 static int mf_src_proc_show(struct seq_file *m, void *v)
1098 mf_getSrcHistory(page, count);
1107 *start = page + off;
1114 static int mf_src_proc_open(struct inode *inode, struct file *file)
1116 return single_open(file, mf_src_proc_show, NULL);
1119 static ssize_t mf_src_proc_write(struct file *file, const char __user *buffer,
1120 size_t count, loff_t *pos)
1124 if (!capable(CAP_SYS_ADMIN))
1127 if ((count < 4) && (count != 1)) {
1128 printk(KERN_ERR "mf_proc: invalid src\n");
1132 if (count > (sizeof(stkbuf) - 1))
1133 count = sizeof(stkbuf) - 1;
1134 if (copy_from_user(stkbuf, buffer, count))
1137 if ((count == 1) && (*stkbuf == '\0'))
1140 mf_display_src(*(u32 *)stkbuf);
1145 static const struct file_operations mf_src_proc_fops = {
1146 .owner = THIS_MODULE,
1147 .open = mf_src_proc_open,
1149 .llseek = seq_lseek,
1150 .release = single_release,
1151 .write = mf_src_proc_write,
1154 static ssize_t mf_cmdline_proc_write(struct file *file, const char __user *buffer,
1155 size_t count, loff_t *pos)
1157 void *data = PDE(file->f_path.dentry->d_inode)->data;
1158 struct vsp_cmd_data vsp_cmd;
1159 dma_addr_t dma_addr;
1163 if (!capable(CAP_SYS_ADMIN))
1167 page = iseries_hv_alloc(count, &dma_addr, GFP_ATOMIC);
1173 if (copy_from_user(page, buffer, count))
1176 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
1178 vsp_cmd.sub_data.kern.token = dma_addr;
1179 vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex;
1180 vsp_cmd.sub_data.kern.side = (u64)data;
1181 vsp_cmd.sub_data.kern.length = count;
1183 (void)signal_vsp_instruction(&vsp_cmd);
1187 iseries_hv_free(count, page, dma_addr);
1192 static const struct file_operations mf_cmdline_proc_fops = {
1193 .owner = THIS_MODULE,
1194 .open = mf_cmdline_proc_open,
1196 .llseek = seq_lseek,
1197 .release = single_release,
1198 .write = mf_cmdline_proc_write,
1201 static ssize_t proc_mf_change_vmlinux(struct file *file,
1202 const char __user *buf,
1203 size_t count, loff_t *ppos)
1205 struct proc_dir_entry *dp = PDE(file->f_path.dentry->d_inode);
1207 dma_addr_t dma_addr;
1209 struct vsp_cmd_data vsp_cmd;
1212 if (!capable(CAP_SYS_ADMIN))
1216 page = iseries_hv_alloc(count, &dma_addr, GFP_ATOMIC);
1219 printk(KERN_ERR "mf.c: couldn't allocate memory to set vmlinux chunk\n");
1223 if (copy_from_user(page, buf, count))
1226 memset(&vsp_cmd, 0, sizeof(vsp_cmd));
1228 vsp_cmd.sub_data.kern.token = dma_addr;
1229 vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex;
1230 vsp_cmd.sub_data.kern.side = (u64)dp->data;
1231 vsp_cmd.sub_data.kern.offset = *ppos;
1232 vsp_cmd.sub_data.kern.length = count;
1234 rc = signal_vsp_instruction(&vsp_cmd);
1238 if (vsp_cmd.result_code != 0)
1244 iseries_hv_free(count, page, dma_addr);
1249 static const struct file_operations proc_vmlinux_operations = {
1250 .write = proc_mf_change_vmlinux,
1253 static int __init mf_proc_init(void)
1255 struct proc_dir_entry *mf_proc_root;
1256 struct proc_dir_entry *ent;
1257 struct proc_dir_entry *mf;
1261 if (!firmware_has_feature(FW_FEATURE_ISERIES))
1264 mf_proc_root = proc_mkdir("iSeries/mf", NULL);
1269 for (i = 0; i < 4; i++) {
1271 mf = proc_mkdir(name, mf_proc_root);
1275 ent = proc_create_data("cmdline", S_IRUSR|S_IWUSR, mf,
1276 &mf_cmdline_proc_fops, (void *)(long)i);
1280 if (i == 3) /* no vmlinux entry for 'D' */
1283 ent = proc_create_data("vmlinux", S_IFREG|S_IWUSR, mf,
1284 &proc_vmlinux_operations,
1290 ent = proc_create("side", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root,
1291 &mf_side_proc_fops);
1295 ent = proc_create("src", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root,
1303 __initcall(mf_proc_init);
1305 #endif /* CONFIG_PROC_FS */
1308 * Get the RTC from the virtual service processor
1309 * This requires flowing LpEvents to the primary partition
1311 void iSeries_get_rtc_time(struct rtc_time *rtc_tm)
1318 * Set the RTC in the virtual service processor
1319 * This requires flowing LpEvents to the primary partition
1321 int iSeries_set_rtc_time(struct rtc_time *tm)
1327 unsigned long iSeries_get_boot_time(void)
1331 mf_get_boot_rtc(&tm);
1332 return mktime(tm.tm_year + 1900, tm.tm_mon, tm.tm_mday,
1333 tm.tm_hour, tm.tm_min, tm.tm_sec);