Commit | Line | Data |
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1da177e4 | 1 | /* |
c8b84976 SR |
2 | * Copyright (C) 2001 Troy D. Armstrong IBM Corporation |
3 | * Copyright (C) 2004-2005 Stephen Rothwell IBM Corporation | |
4 | * | |
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. | |
10 | * | |
11 | * | |
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. | |
16 | * | |
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. | |
21 | * | |
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 | |
25 | */ | |
1da177e4 LT |
26 | |
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> | |
66b15db6 | 33 | #include <linux/export.h> |
22ae782f | 34 | #include <linux/proc_fs.h> |
1da177e4 LT |
35 | #include <linux/dma-mapping.h> |
36 | #include <linux/bcd.h> | |
143a1dec | 37 | #include <linux/rtc.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
1da177e4 LT |
39 | |
40 | #include <asm/time.h> | |
41 | #include <asm/uaccess.h> | |
d0e8e291 | 42 | #include <asm/paca.h> |
426c1a11 | 43 | #include <asm/abs_addr.h> |
d9523aa1 | 44 | #include <asm/firmware.h> |
bbc8b628 | 45 | #include <asm/iseries/mf.h> |
15b17189 | 46 | #include <asm/iseries/hv_lp_config.h> |
1670b2b2 | 47 | #include <asm/iseries/hv_lp_event.h> |
8875ccfb | 48 | #include <asm/iseries/it_lp_queue.h> |
1da177e4 | 49 | |
c8b84976 SR |
50 | #include "setup.h" |
51 | ||
260de22f | 52 | static int mf_initialized; |
c8b84976 | 53 | |
1da177e4 | 54 | /* |
25985edc | 55 | * This is the structure layout for the Machine Facilities LPAR event |
1da177e4 LT |
56 | * flows. |
57 | */ | |
58 | struct vsp_cmd_data { | |
59 | u64 token; | |
60 | u16 cmd; | |
61 | HvLpIndex lp_index; | |
62 | u8 result_code; | |
63 | u32 reserved; | |
64 | union { | |
65 | u64 state; /* GetStateOut */ | |
66 | u64 ipl_type; /* GetIplTypeOut, Function02SelectIplTypeIn */ | |
67 | u64 ipl_mode; /* GetIplModeOut, Function02SelectIplModeIn */ | |
68 | u64 page[4]; /* GetSrcHistoryIn */ | |
69 | u64 flag; /* GetAutoIplWhenPrimaryIplsOut, | |
70 | SetAutoIplWhenPrimaryIplsIn, | |
71 | WhiteButtonPowerOffIn, | |
72 | Function08FastPowerOffIn, | |
73 | IsSpcnRackPowerIncompleteOut */ | |
74 | struct { | |
75 | u64 token; | |
76 | u64 address_type; | |
77 | u64 side; | |
78 | u32 length; | |
79 | u32 offset; | |
80 | } kern; /* SetKernelImageIn, GetKernelImageIn, | |
81 | SetKernelCmdLineIn, GetKernelCmdLineIn */ | |
82 | u32 length_out; /* GetKernelImageOut, GetKernelCmdLineOut */ | |
83 | u8 reserved[80]; | |
84 | } sub_data; | |
85 | }; | |
86 | ||
87 | struct vsp_rsp_data { | |
88 | struct completion com; | |
89 | struct vsp_cmd_data *response; | |
90 | }; | |
91 | ||
92 | struct alloc_data { | |
93 | u16 size; | |
94 | u16 type; | |
95 | u32 count; | |
96 | u16 reserved1; | |
97 | u8 reserved2; | |
98 | HvLpIndex target_lp; | |
99 | }; | |
100 | ||
101 | struct ce_msg_data; | |
102 | ||
103 | typedef void (*ce_msg_comp_hdlr)(void *token, struct ce_msg_data *vsp_cmd_rsp); | |
104 | ||
105 | struct ce_msg_comp_data { | |
106 | ce_msg_comp_hdlr handler; | |
107 | void *token; | |
108 | }; | |
109 | ||
110 | struct ce_msg_data { | |
111 | u8 ce_msg[12]; | |
112 | char reserved[4]; | |
113 | struct ce_msg_comp_data *completion; | |
114 | }; | |
115 | ||
116 | struct io_mf_lp_event { | |
117 | struct HvLpEvent hp_lp_event; | |
118 | u16 subtype_result_code; | |
119 | u16 reserved1; | |
120 | u32 reserved2; | |
121 | union { | |
122 | struct alloc_data alloc; | |
123 | struct ce_msg_data ce_msg; | |
124 | struct vsp_cmd_data vsp_cmd; | |
125 | } data; | |
126 | }; | |
127 | ||
128 | #define subtype_data(a, b, c, d) \ | |
129 | (((a) << 24) + ((b) << 16) + ((c) << 8) + (d)) | |
130 | ||
131 | /* | |
132 | * All outgoing event traffic is kept on a FIFO queue. The first | |
133 | * pointer points to the one that is outstanding, and all new | |
134 | * requests get stuck on the end. Also, we keep a certain number of | |
135 | * preallocated pending events so that we can operate very early in | |
136 | * the boot up sequence (before kmalloc is ready). | |
137 | */ | |
138 | struct pending_event { | |
139 | struct pending_event *next; | |
140 | struct io_mf_lp_event event; | |
141 | MFCompleteHandler hdlr; | |
142 | char dma_data[72]; | |
143 | unsigned dma_data_length; | |
144 | unsigned remote_address; | |
145 | }; | |
146 | static spinlock_t pending_event_spinlock; | |
147 | static struct pending_event *pending_event_head; | |
148 | static struct pending_event *pending_event_tail; | |
149 | static struct pending_event *pending_event_avail; | |
260de22f ME |
150 | #define PENDING_EVENT_PREALLOC_LEN 16 |
151 | static struct pending_event pending_event_prealloc[PENDING_EVENT_PREALLOC_LEN]; | |
1da177e4 LT |
152 | |
153 | /* | |
154 | * Put a pending event onto the available queue, so it can get reused. | |
155 | * Attention! You must have the pending_event_spinlock before calling! | |
156 | */ | |
157 | static void free_pending_event(struct pending_event *ev) | |
158 | { | |
159 | if (ev != NULL) { | |
160 | ev->next = pending_event_avail; | |
161 | pending_event_avail = ev; | |
162 | } | |
163 | } | |
164 | ||
165 | /* | |
166 | * Enqueue the outbound event onto the stack. If the queue was | |
167 | * empty to begin with, we must also issue it via the Hypervisor | |
168 | * interface. There is a section of code below that will touch | |
169 | * the first stack pointer without the protection of the pending_event_spinlock. | |
170 | * This is OK, because we know that nobody else will be modifying | |
171 | * the first pointer when we do this. | |
172 | */ | |
173 | static int signal_event(struct pending_event *ev) | |
174 | { | |
175 | int rc = 0; | |
176 | unsigned long flags; | |
177 | int go = 1; | |
178 | struct pending_event *ev1; | |
179 | HvLpEvent_Rc hv_rc; | |
180 | ||
181 | /* enqueue the event */ | |
182 | if (ev != NULL) { | |
183 | ev->next = NULL; | |
184 | spin_lock_irqsave(&pending_event_spinlock, flags); | |
185 | if (pending_event_head == NULL) | |
186 | pending_event_head = ev; | |
187 | else { | |
188 | go = 0; | |
189 | pending_event_tail->next = ev; | |
190 | } | |
191 | pending_event_tail = ev; | |
192 | spin_unlock_irqrestore(&pending_event_spinlock, flags); | |
193 | } | |
194 | ||
195 | /* send the event */ | |
196 | while (go) { | |
197 | go = 0; | |
198 | ||
199 | /* any DMA data to send beforehand? */ | |
200 | if (pending_event_head->dma_data_length > 0) | |
201 | HvCallEvent_dmaToSp(pending_event_head->dma_data, | |
202 | pending_event_head->remote_address, | |
203 | pending_event_head->dma_data_length, | |
204 | HvLpDma_Direction_LocalToRemote); | |
205 | ||
206 | hv_rc = HvCallEvent_signalLpEvent( | |
207 | &pending_event_head->event.hp_lp_event); | |
208 | if (hv_rc != HvLpEvent_Rc_Good) { | |
209 | printk(KERN_ERR "mf.c: HvCallEvent_signalLpEvent() " | |
210 | "failed with %d\n", (int)hv_rc); | |
211 | ||
212 | spin_lock_irqsave(&pending_event_spinlock, flags); | |
213 | ev1 = pending_event_head; | |
214 | pending_event_head = pending_event_head->next; | |
215 | if (pending_event_head != NULL) | |
216 | go = 1; | |
217 | spin_unlock_irqrestore(&pending_event_spinlock, flags); | |
218 | ||
219 | if (ev1 == ev) | |
220 | rc = -EIO; | |
221 | else if (ev1->hdlr != NULL) | |
222 | (*ev1->hdlr)((void *)ev1->event.hp_lp_event.xCorrelationToken, -EIO); | |
223 | ||
224 | spin_lock_irqsave(&pending_event_spinlock, flags); | |
225 | free_pending_event(ev1); | |
226 | spin_unlock_irqrestore(&pending_event_spinlock, flags); | |
227 | } | |
228 | } | |
229 | ||
230 | return rc; | |
231 | } | |
232 | ||
233 | /* | |
234 | * Allocate a new pending_event structure, and initialize it. | |
235 | */ | |
236 | static struct pending_event *new_pending_event(void) | |
237 | { | |
238 | struct pending_event *ev = NULL; | |
239 | HvLpIndex primary_lp = HvLpConfig_getPrimaryLpIndex(); | |
240 | unsigned long flags; | |
241 | struct HvLpEvent *hev; | |
242 | ||
243 | spin_lock_irqsave(&pending_event_spinlock, flags); | |
244 | if (pending_event_avail != NULL) { | |
245 | ev = pending_event_avail; | |
246 | pending_event_avail = pending_event_avail->next; | |
247 | } | |
248 | spin_unlock_irqrestore(&pending_event_spinlock, flags); | |
249 | if (ev == NULL) { | |
250 | ev = kmalloc(sizeof(struct pending_event), GFP_ATOMIC); | |
251 | if (ev == NULL) { | |
252 | printk(KERN_ERR "mf.c: unable to kmalloc %ld bytes\n", | |
253 | sizeof(struct pending_event)); | |
254 | return NULL; | |
255 | } | |
256 | } | |
257 | memset(ev, 0, sizeof(struct pending_event)); | |
258 | hev = &ev->event.hp_lp_event; | |
677f8c0d | 259 | hev->flags = HV_LP_EVENT_VALID | HV_LP_EVENT_DO_ACK | HV_LP_EVENT_INT; |
1da177e4 LT |
260 | hev->xType = HvLpEvent_Type_MachineFac; |
261 | hev->xSourceLp = HvLpConfig_getLpIndex(); | |
262 | hev->xTargetLp = primary_lp; | |
263 | hev->xSizeMinus1 = sizeof(ev->event) - 1; | |
264 | hev->xRc = HvLpEvent_Rc_Good; | |
265 | hev->xSourceInstanceId = HvCallEvent_getSourceLpInstanceId(primary_lp, | |
266 | HvLpEvent_Type_MachineFac); | |
267 | hev->xTargetInstanceId = HvCallEvent_getTargetLpInstanceId(primary_lp, | |
268 | HvLpEvent_Type_MachineFac); | |
269 | ||
270 | return ev; | |
271 | } | |
272 | ||
e8d1673b ME |
273 | static int __maybe_unused |
274 | signal_vsp_instruction(struct vsp_cmd_data *vsp_cmd) | |
1da177e4 LT |
275 | { |
276 | struct pending_event *ev = new_pending_event(); | |
277 | int rc; | |
278 | struct vsp_rsp_data response; | |
279 | ||
280 | if (ev == NULL) | |
281 | return -ENOMEM; | |
282 | ||
283 | init_completion(&response.com); | |
284 | response.response = vsp_cmd; | |
285 | ev->event.hp_lp_event.xSubtype = 6; | |
286 | ev->event.hp_lp_event.x.xSubtypeData = | |
287 | subtype_data('M', 'F', 'V', 'I'); | |
288 | ev->event.data.vsp_cmd.token = (u64)&response; | |
289 | ev->event.data.vsp_cmd.cmd = vsp_cmd->cmd; | |
290 | ev->event.data.vsp_cmd.lp_index = HvLpConfig_getLpIndex(); | |
291 | ev->event.data.vsp_cmd.result_code = 0xFF; | |
292 | ev->event.data.vsp_cmd.reserved = 0; | |
293 | memcpy(&(ev->event.data.vsp_cmd.sub_data), | |
294 | &(vsp_cmd->sub_data), sizeof(vsp_cmd->sub_data)); | |
295 | mb(); | |
296 | ||
297 | rc = signal_event(ev); | |
298 | if (rc == 0) | |
299 | wait_for_completion(&response.com); | |
300 | return rc; | |
301 | } | |
302 | ||
303 | ||
304 | /* | |
305 | * Send a 12-byte CE message to the primary partition VSP object | |
306 | */ | |
307 | static int signal_ce_msg(char *ce_msg, struct ce_msg_comp_data *completion) | |
308 | { | |
309 | struct pending_event *ev = new_pending_event(); | |
310 | ||
311 | if (ev == NULL) | |
312 | return -ENOMEM; | |
313 | ||
314 | ev->event.hp_lp_event.xSubtype = 0; | |
315 | ev->event.hp_lp_event.x.xSubtypeData = | |
316 | subtype_data('M', 'F', 'C', 'E'); | |
317 | memcpy(ev->event.data.ce_msg.ce_msg, ce_msg, 12); | |
318 | ev->event.data.ce_msg.completion = completion; | |
319 | return signal_event(ev); | |
320 | } | |
321 | ||
322 | /* | |
323 | * Send a 12-byte CE message (with no data) to the primary partition VSP object | |
324 | */ | |
325 | static int signal_ce_msg_simple(u8 ce_op, struct ce_msg_comp_data *completion) | |
326 | { | |
327 | u8 ce_msg[12]; | |
328 | ||
329 | memset(ce_msg, 0, sizeof(ce_msg)); | |
330 | ce_msg[3] = ce_op; | |
331 | return signal_ce_msg(ce_msg, completion); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Send a 12-byte CE message and DMA data to the primary partition VSP object | |
336 | */ | |
337 | static int dma_and_signal_ce_msg(char *ce_msg, | |
338 | struct ce_msg_comp_data *completion, void *dma_data, | |
339 | unsigned dma_data_length, unsigned remote_address) | |
340 | { | |
341 | struct pending_event *ev = new_pending_event(); | |
342 | ||
343 | if (ev == NULL) | |
344 | return -ENOMEM; | |
345 | ||
346 | ev->event.hp_lp_event.xSubtype = 0; | |
347 | ev->event.hp_lp_event.x.xSubtypeData = | |
348 | subtype_data('M', 'F', 'C', 'E'); | |
349 | memcpy(ev->event.data.ce_msg.ce_msg, ce_msg, 12); | |
350 | ev->event.data.ce_msg.completion = completion; | |
351 | memcpy(ev->dma_data, dma_data, dma_data_length); | |
352 | ev->dma_data_length = dma_data_length; | |
353 | ev->remote_address = remote_address; | |
354 | return signal_event(ev); | |
355 | } | |
356 | ||
357 | /* | |
358 | * Initiate a nice (hopefully) shutdown of Linux. We simply are | |
359 | * going to try and send the init process a SIGINT signal. If | |
360 | * this fails (why?), we'll simply force it off in a not-so-nice | |
361 | * manner. | |
362 | */ | |
363 | static int shutdown(void) | |
364 | { | |
9ec52099 | 365 | int rc = kill_cad_pid(SIGINT, 1); |
1da177e4 LT |
366 | |
367 | if (rc) { | |
368 | printk(KERN_ALERT "mf.c: SIGINT to init failed (%d), " | |
369 | "hard shutdown commencing\n", rc); | |
370 | mf_power_off(); | |
371 | } else | |
372 | printk(KERN_INFO "mf.c: init has been successfully notified " | |
373 | "to proceed with shutdown\n"); | |
374 | return rc; | |
375 | } | |
376 | ||
377 | /* | |
378 | * The primary partition VSP object is sending us a new | |
379 | * event flow. Handle it... | |
380 | */ | |
381 | static void handle_int(struct io_mf_lp_event *event) | |
382 | { | |
383 | struct ce_msg_data *ce_msg_data; | |
384 | struct ce_msg_data *pce_msg_data; | |
385 | unsigned long flags; | |
386 | struct pending_event *pev; | |
387 | ||
388 | /* ack the interrupt */ | |
389 | event->hp_lp_event.xRc = HvLpEvent_Rc_Good; | |
390 | HvCallEvent_ackLpEvent(&event->hp_lp_event); | |
391 | ||
392 | /* process interrupt */ | |
393 | switch (event->hp_lp_event.xSubtype) { | |
394 | case 0: /* CE message */ | |
395 | ce_msg_data = &event->data.ce_msg; | |
396 | switch (ce_msg_data->ce_msg[3]) { | |
397 | case 0x5B: /* power control notification */ | |
398 | if ((ce_msg_data->ce_msg[5] & 0x20) != 0) { | |
399 | printk(KERN_INFO "mf.c: Commencing partition shutdown\n"); | |
400 | if (shutdown() == 0) | |
401 | signal_ce_msg_simple(0xDB, NULL); | |
402 | } | |
403 | break; | |
404 | case 0xC0: /* get time */ | |
405 | spin_lock_irqsave(&pending_event_spinlock, flags); | |
406 | pev = pending_event_head; | |
407 | if (pev != NULL) | |
408 | pending_event_head = pending_event_head->next; | |
409 | spin_unlock_irqrestore(&pending_event_spinlock, flags); | |
410 | if (pev == NULL) | |
411 | break; | |
412 | pce_msg_data = &pev->event.data.ce_msg; | |
413 | if (pce_msg_data->ce_msg[3] != 0x40) | |
414 | break; | |
415 | if (pce_msg_data->completion != NULL) { | |
416 | ce_msg_comp_hdlr handler = | |
417 | pce_msg_data->completion->handler; | |
418 | void *token = pce_msg_data->completion->token; | |
419 | ||
420 | if (handler != NULL) | |
421 | (*handler)(token, ce_msg_data); | |
422 | } | |
423 | spin_lock_irqsave(&pending_event_spinlock, flags); | |
424 | free_pending_event(pev); | |
425 | spin_unlock_irqrestore(&pending_event_spinlock, flags); | |
426 | /* send next waiting event */ | |
427 | if (pending_event_head != NULL) | |
428 | signal_event(NULL); | |
429 | break; | |
430 | } | |
431 | break; | |
432 | case 1: /* IT sys shutdown */ | |
433 | printk(KERN_INFO "mf.c: Commencing system shutdown\n"); | |
434 | shutdown(); | |
435 | break; | |
436 | } | |
437 | } | |
438 | ||
439 | /* | |
440 | * The primary partition VSP object is acknowledging the receipt | |
441 | * of a flow we sent to them. If there are other flows queued | |
442 | * up, we must send another one now... | |
443 | */ | |
444 | static void handle_ack(struct io_mf_lp_event *event) | |
445 | { | |
446 | unsigned long flags; | |
447 | struct pending_event *two = NULL; | |
448 | unsigned long free_it = 0; | |
449 | struct ce_msg_data *ce_msg_data; | |
450 | struct ce_msg_data *pce_msg_data; | |
451 | struct vsp_rsp_data *rsp; | |
452 | ||
453 | /* handle current event */ | |
454 | if (pending_event_head == NULL) { | |
455 | printk(KERN_ERR "mf.c: stack empty for receiving ack\n"); | |
456 | return; | |
457 | } | |
458 | ||
459 | switch (event->hp_lp_event.xSubtype) { | |
460 | case 0: /* CE msg */ | |
461 | ce_msg_data = &event->data.ce_msg; | |
462 | if (ce_msg_data->ce_msg[3] != 0x40) { | |
463 | free_it = 1; | |
464 | break; | |
465 | } | |
466 | if (ce_msg_data->ce_msg[2] == 0) | |
467 | break; | |
468 | free_it = 1; | |
469 | pce_msg_data = &pending_event_head->event.data.ce_msg; | |
470 | if (pce_msg_data->completion != NULL) { | |
471 | ce_msg_comp_hdlr handler = | |
472 | pce_msg_data->completion->handler; | |
473 | void *token = pce_msg_data->completion->token; | |
474 | ||
475 | if (handler != NULL) | |
476 | (*handler)(token, ce_msg_data); | |
477 | } | |
478 | break; | |
479 | case 4: /* allocate */ | |
480 | case 5: /* deallocate */ | |
481 | if (pending_event_head->hdlr != NULL) | |
482 | (*pending_event_head->hdlr)((void *)event->hp_lp_event.xCorrelationToken, event->data.alloc.count); | |
483 | free_it = 1; | |
484 | break; | |
485 | case 6: | |
486 | free_it = 1; | |
487 | rsp = (struct vsp_rsp_data *)event->data.vsp_cmd.token; | |
488 | if (rsp == NULL) { | |
489 | printk(KERN_ERR "mf.c: no rsp\n"); | |
490 | break; | |
491 | } | |
492 | if (rsp->response != NULL) | |
493 | memcpy(rsp->response, &event->data.vsp_cmd, | |
494 | sizeof(event->data.vsp_cmd)); | |
495 | complete(&rsp->com); | |
496 | break; | |
497 | } | |
498 | ||
499 | /* remove from queue */ | |
500 | spin_lock_irqsave(&pending_event_spinlock, flags); | |
501 | if ((pending_event_head != NULL) && (free_it == 1)) { | |
502 | struct pending_event *oldHead = pending_event_head; | |
503 | ||
504 | pending_event_head = pending_event_head->next; | |
505 | two = pending_event_head; | |
506 | free_pending_event(oldHead); | |
507 | } | |
508 | spin_unlock_irqrestore(&pending_event_spinlock, flags); | |
509 | ||
510 | /* send next waiting event */ | |
511 | if (two != NULL) | |
512 | signal_event(NULL); | |
513 | } | |
514 | ||
515 | /* | |
516 | * This is the generic event handler we are registering with | |
517 | * the Hypervisor. Ensure the flows are for us, and then | |
518 | * parse it enough to know if it is an interrupt or an | |
519 | * acknowledge. | |
520 | */ | |
35a84c2f | 521 | static void hv_handler(struct HvLpEvent *event) |
1da177e4 LT |
522 | { |
523 | if ((event != NULL) && (event->xType == HvLpEvent_Type_MachineFac)) { | |
677f8c0d | 524 | if (hvlpevent_is_ack(event)) |
1da177e4 | 525 | handle_ack((struct io_mf_lp_event *)event); |
677f8c0d | 526 | else |
1da177e4 | 527 | handle_int((struct io_mf_lp_event *)event); |
1da177e4 LT |
528 | } else |
529 | printk(KERN_ERR "mf.c: alien event received\n"); | |
530 | } | |
531 | ||
532 | /* | |
533 | * Global kernel interface to allocate and seed events into the | |
534 | * Hypervisor. | |
535 | */ | |
536 | void mf_allocate_lp_events(HvLpIndex target_lp, HvLpEvent_Type type, | |
537 | unsigned size, unsigned count, MFCompleteHandler hdlr, | |
538 | void *user_token) | |
539 | { | |
540 | struct pending_event *ev = new_pending_event(); | |
541 | int rc; | |
542 | ||
543 | if (ev == NULL) { | |
544 | rc = -ENOMEM; | |
545 | } else { | |
546 | ev->event.hp_lp_event.xSubtype = 4; | |
547 | ev->event.hp_lp_event.xCorrelationToken = (u64)user_token; | |
548 | ev->event.hp_lp_event.x.xSubtypeData = | |
549 | subtype_data('M', 'F', 'M', 'A'); | |
550 | ev->event.data.alloc.target_lp = target_lp; | |
551 | ev->event.data.alloc.type = type; | |
552 | ev->event.data.alloc.size = size; | |
553 | ev->event.data.alloc.count = count; | |
554 | ev->hdlr = hdlr; | |
555 | rc = signal_event(ev); | |
556 | } | |
557 | if ((rc != 0) && (hdlr != NULL)) | |
558 | (*hdlr)(user_token, rc); | |
559 | } | |
560 | EXPORT_SYMBOL(mf_allocate_lp_events); | |
561 | ||
562 | /* | |
563 | * Global kernel interface to unseed and deallocate events already in | |
564 | * Hypervisor. | |
565 | */ | |
566 | void mf_deallocate_lp_events(HvLpIndex target_lp, HvLpEvent_Type type, | |
567 | unsigned count, MFCompleteHandler hdlr, void *user_token) | |
568 | { | |
569 | struct pending_event *ev = new_pending_event(); | |
570 | int rc; | |
571 | ||
572 | if (ev == NULL) | |
573 | rc = -ENOMEM; | |
574 | else { | |
575 | ev->event.hp_lp_event.xSubtype = 5; | |
576 | ev->event.hp_lp_event.xCorrelationToken = (u64)user_token; | |
577 | ev->event.hp_lp_event.x.xSubtypeData = | |
578 | subtype_data('M', 'F', 'M', 'D'); | |
579 | ev->event.data.alloc.target_lp = target_lp; | |
580 | ev->event.data.alloc.type = type; | |
581 | ev->event.data.alloc.count = count; | |
582 | ev->hdlr = hdlr; | |
583 | rc = signal_event(ev); | |
584 | } | |
585 | if ((rc != 0) && (hdlr != NULL)) | |
586 | (*hdlr)(user_token, rc); | |
587 | } | |
588 | EXPORT_SYMBOL(mf_deallocate_lp_events); | |
589 | ||
590 | /* | |
591 | * Global kernel interface to tell the VSP object in the primary | |
592 | * partition to power this partition off. | |
593 | */ | |
594 | void mf_power_off(void) | |
595 | { | |
596 | printk(KERN_INFO "mf.c: Down it goes...\n"); | |
597 | signal_ce_msg_simple(0x4d, NULL); | |
598 | for (;;) | |
599 | ; | |
600 | } | |
601 | ||
602 | /* | |
603 | * Global kernel interface to tell the VSP object in the primary | |
604 | * partition to reboot this partition. | |
605 | */ | |
a9ea2101 | 606 | void mf_reboot(char *cmd) |
1da177e4 LT |
607 | { |
608 | printk(KERN_INFO "mf.c: Preparing to bounce...\n"); | |
609 | signal_ce_msg_simple(0x4e, NULL); | |
610 | for (;;) | |
611 | ; | |
612 | } | |
613 | ||
614 | /* | |
615 | * Display a single word SRC onto the VSP control panel. | |
616 | */ | |
617 | void mf_display_src(u32 word) | |
618 | { | |
619 | u8 ce[12]; | |
620 | ||
621 | memset(ce, 0, sizeof(ce)); | |
622 | ce[3] = 0x4a; | |
623 | ce[7] = 0x01; | |
624 | ce[8] = word >> 24; | |
625 | ce[9] = word >> 16; | |
626 | ce[10] = word >> 8; | |
627 | ce[11] = word; | |
628 | signal_ce_msg(ce, NULL); | |
629 | } | |
630 | ||
631 | /* | |
632 | * Display a single word SRC of the form "PROGXXXX" on the VSP control panel. | |
633 | */ | |
260de22f | 634 | static __init void mf_display_progress_src(u16 value) |
1da177e4 LT |
635 | { |
636 | u8 ce[12]; | |
637 | u8 src[72]; | |
638 | ||
639 | memcpy(ce, "\x00\x00\x04\x4A\x00\x00\x00\x48\x00\x00\x00\x00", 12); | |
640 | memcpy(src, "\x01\x00\x00\x01\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\x00\x00\x00\x00\x00\x00\x00\x00\x00" | |
643 | "\x00\x00\x00\x00PROGxxxx ", | |
644 | 72); | |
645 | src[6] = value >> 8; | |
646 | src[7] = value & 255; | |
647 | src[44] = "0123456789ABCDEF"[(value >> 12) & 15]; | |
648 | src[45] = "0123456789ABCDEF"[(value >> 8) & 15]; | |
649 | src[46] = "0123456789ABCDEF"[(value >> 4) & 15]; | |
650 | src[47] = "0123456789ABCDEF"[value & 15]; | |
651 | dma_and_signal_ce_msg(ce, NULL, src, sizeof(src), 9 * 64 * 1024); | |
652 | } | |
653 | ||
654 | /* | |
655 | * Clear the VSP control panel. Used to "erase" an SRC that was | |
656 | * previously displayed. | |
657 | */ | |
260de22f | 658 | static void mf_clear_src(void) |
1da177e4 LT |
659 | { |
660 | signal_ce_msg_simple(0x4b, NULL); | |
661 | } | |
662 | ||
260de22f ME |
663 | void __init mf_display_progress(u16 value) |
664 | { | |
4bd174fe | 665 | if (!mf_initialized) |
260de22f ME |
666 | return; |
667 | ||
668 | if (0xFFFF == value) | |
669 | mf_clear_src(); | |
670 | else | |
671 | mf_display_progress_src(value); | |
672 | } | |
673 | ||
1da177e4 LT |
674 | /* |
675 | * Initialization code here. | |
676 | */ | |
260de22f | 677 | void __init mf_init(void) |
1da177e4 LT |
678 | { |
679 | int i; | |
680 | ||
1da177e4 | 681 | spin_lock_init(&pending_event_spinlock); |
260de22f ME |
682 | |
683 | for (i = 0; i < PENDING_EVENT_PREALLOC_LEN; i++) | |
1da177e4 | 684 | free_pending_event(&pending_event_prealloc[i]); |
260de22f | 685 | |
1da177e4 LT |
686 | HvLpEvent_registerHandler(HvLpEvent_Type_MachineFac, &hv_handler); |
687 | ||
688 | /* virtual continue ack */ | |
689 | signal_ce_msg_simple(0x57, NULL); | |
690 | ||
260de22f ME |
691 | mf_initialized = 1; |
692 | mb(); | |
693 | ||
1da177e4 LT |
694 | printk(KERN_NOTICE "mf.c: iSeries Linux LPAR Machine Facilities " |
695 | "initialized\n"); | |
696 | } | |
697 | ||
698 | struct rtc_time_data { | |
699 | struct completion com; | |
700 | struct ce_msg_data ce_msg; | |
701 | int rc; | |
702 | }; | |
703 | ||
704 | static void get_rtc_time_complete(void *token, struct ce_msg_data *ce_msg) | |
705 | { | |
706 | struct rtc_time_data *rtc = token; | |
707 | ||
708 | memcpy(&rtc->ce_msg, ce_msg, sizeof(rtc->ce_msg)); | |
709 | rtc->rc = 0; | |
710 | complete(&rtc->com); | |
711 | } | |
712 | ||
00611c5c ME |
713 | static int mf_set_rtc(struct rtc_time *tm) |
714 | { | |
715 | char ce_time[12]; | |
716 | u8 day, mon, hour, min, sec, y1, y2; | |
717 | unsigned year; | |
718 | ||
719 | year = 1900 + tm->tm_year; | |
720 | y1 = year / 100; | |
721 | y2 = year % 100; | |
722 | ||
723 | sec = tm->tm_sec; | |
724 | min = tm->tm_min; | |
725 | hour = tm->tm_hour; | |
726 | day = tm->tm_mday; | |
727 | mon = tm->tm_mon + 1; | |
728 | ||
8f6ba492 AB |
729 | sec = bin2bcd(sec); |
730 | min = bin2bcd(min); | |
731 | hour = bin2bcd(hour); | |
732 | mon = bin2bcd(mon); | |
733 | day = bin2bcd(day); | |
734 | y1 = bin2bcd(y1); | |
735 | y2 = bin2bcd(y2); | |
00611c5c ME |
736 | |
737 | memset(ce_time, 0, sizeof(ce_time)); | |
738 | ce_time[3] = 0x41; | |
739 | ce_time[4] = y1; | |
740 | ce_time[5] = y2; | |
741 | ce_time[6] = sec; | |
742 | ce_time[7] = min; | |
743 | ce_time[8] = hour; | |
744 | ce_time[10] = day; | |
745 | ce_time[11] = mon; | |
746 | ||
747 | return signal_ce_msg(ce_time, NULL); | |
748 | } | |
749 | ||
d0e8e291 | 750 | static int rtc_set_tm(int rc, u8 *ce_msg, struct rtc_time *tm) |
1da177e4 | 751 | { |
1da177e4 LT |
752 | tm->tm_wday = 0; |
753 | tm->tm_yday = 0; | |
754 | tm->tm_isdst = 0; | |
d0e8e291 | 755 | if (rc) { |
1da177e4 LT |
756 | tm->tm_sec = 0; |
757 | tm->tm_min = 0; | |
758 | tm->tm_hour = 0; | |
759 | tm->tm_mday = 15; | |
760 | tm->tm_mon = 5; | |
761 | tm->tm_year = 52; | |
d0e8e291 | 762 | return rc; |
1da177e4 LT |
763 | } |
764 | ||
d0e8e291 SR |
765 | if ((ce_msg[2] == 0xa9) || |
766 | (ce_msg[2] == 0xaf)) { | |
1da177e4 LT |
767 | /* TOD clock is not set */ |
768 | tm->tm_sec = 1; | |
769 | tm->tm_min = 1; | |
770 | tm->tm_hour = 1; | |
771 | tm->tm_mday = 10; | |
772 | tm->tm_mon = 8; | |
773 | tm->tm_year = 71; | |
774 | mf_set_rtc(tm); | |
775 | } | |
776 | { | |
1da177e4 LT |
777 | u8 year = ce_msg[5]; |
778 | u8 sec = ce_msg[6]; | |
779 | u8 min = ce_msg[7]; | |
780 | u8 hour = ce_msg[8]; | |
781 | u8 day = ce_msg[10]; | |
782 | u8 mon = ce_msg[11]; | |
783 | ||
8f6ba492 AB |
784 | sec = bcd2bin(sec); |
785 | min = bcd2bin(min); | |
786 | hour = bcd2bin(hour); | |
787 | day = bcd2bin(day); | |
788 | mon = bcd2bin(mon); | |
789 | year = bcd2bin(year); | |
1da177e4 LT |
790 | |
791 | if (year <= 69) | |
792 | year += 100; | |
793 | ||
794 | tm->tm_sec = sec; | |
795 | tm->tm_min = min; | |
796 | tm->tm_hour = hour; | |
797 | tm->tm_mday = day; | |
798 | tm->tm_mon = mon; | |
799 | tm->tm_year = year; | |
800 | } | |
801 | ||
802 | return 0; | |
803 | } | |
d0e8e291 | 804 | |
00611c5c | 805 | static int mf_get_rtc(struct rtc_time *tm) |
d0e8e291 SR |
806 | { |
807 | struct ce_msg_comp_data ce_complete; | |
808 | struct rtc_time_data rtc_data; | |
809 | int rc; | |
810 | ||
811 | memset(&ce_complete, 0, sizeof(ce_complete)); | |
812 | memset(&rtc_data, 0, sizeof(rtc_data)); | |
813 | init_completion(&rtc_data.com); | |
814 | ce_complete.handler = &get_rtc_time_complete; | |
815 | ce_complete.token = &rtc_data; | |
816 | rc = signal_ce_msg_simple(0x40, &ce_complete); | |
817 | if (rc) | |
818 | return rc; | |
819 | wait_for_completion(&rtc_data.com); | |
820 | return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm); | |
821 | } | |
822 | ||
823 | struct boot_rtc_time_data { | |
824 | int busy; | |
825 | struct ce_msg_data ce_msg; | |
826 | int rc; | |
827 | }; | |
828 | ||
829 | static void get_boot_rtc_time_complete(void *token, struct ce_msg_data *ce_msg) | |
830 | { | |
831 | struct boot_rtc_time_data *rtc = token; | |
832 | ||
833 | memcpy(&rtc->ce_msg, ce_msg, sizeof(rtc->ce_msg)); | |
834 | rtc->rc = 0; | |
835 | rtc->busy = 0; | |
836 | } | |
837 | ||
00611c5c | 838 | static int mf_get_boot_rtc(struct rtc_time *tm) |
d0e8e291 SR |
839 | { |
840 | struct ce_msg_comp_data ce_complete; | |
841 | struct boot_rtc_time_data rtc_data; | |
842 | int rc; | |
843 | ||
844 | memset(&ce_complete, 0, sizeof(ce_complete)); | |
845 | memset(&rtc_data, 0, sizeof(rtc_data)); | |
846 | rtc_data.busy = 1; | |
847 | ce_complete.handler = &get_boot_rtc_time_complete; | |
848 | ce_complete.token = &rtc_data; | |
849 | rc = signal_ce_msg_simple(0x40, &ce_complete); | |
850 | if (rc) | |
851 | return rc; | |
852 | /* We need to poll here as we are not yet taking interrupts */ | |
853 | while (rtc_data.busy) { | |
937b31b1 | 854 | if (hvlpevent_is_pending()) |
35a84c2f | 855 | process_hvlpevents(); |
d0e8e291 SR |
856 | } |
857 | return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm); | |
858 | } | |
1da177e4 | 859 | |
1da177e4 | 860 | #ifdef CONFIG_PROC_FS |
5c916a29 | 861 | static int mf_cmdline_proc_show(struct seq_file *m, void *v) |
1da177e4 | 862 | { |
5c916a29 | 863 | char *page, *p; |
1da177e4 LT |
864 | struct vsp_cmd_data vsp_cmd; |
865 | int rc; | |
866 | dma_addr_t dma_addr; | |
867 | ||
868 | /* The HV appears to return no more than 256 bytes of command line */ | |
5c916a29 AD |
869 | page = kmalloc(256, GFP_KERNEL); |
870 | if (!page) | |
871 | return -ENOMEM; | |
1da177e4 | 872 | |
5c916a29 AD |
873 | dma_addr = iseries_hv_map(page, 256, DMA_FROM_DEVICE); |
874 | if (dma_addr == DMA_ERROR_CODE) { | |
875 | kfree(page); | |
1da177e4 | 876 | return -ENOMEM; |
5c916a29 AD |
877 | } |
878 | memset(page, 0, 256); | |
1da177e4 LT |
879 | memset(&vsp_cmd, 0, sizeof(vsp_cmd)); |
880 | vsp_cmd.cmd = 33; | |
881 | vsp_cmd.sub_data.kern.token = dma_addr; | |
882 | vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex; | |
5c916a29 AD |
883 | vsp_cmd.sub_data.kern.side = (u64)m->private; |
884 | vsp_cmd.sub_data.kern.length = 256; | |
1da177e4 LT |
885 | mb(); |
886 | rc = signal_vsp_instruction(&vsp_cmd); | |
5c916a29 AD |
887 | iseries_hv_unmap(dma_addr, 256, DMA_FROM_DEVICE); |
888 | if (rc) { | |
889 | kfree(page); | |
1da177e4 | 890 | return rc; |
5c916a29 AD |
891 | } |
892 | if (vsp_cmd.result_code != 0) { | |
893 | kfree(page); | |
1da177e4 | 894 | return -ENOMEM; |
5c916a29 | 895 | } |
1da177e4 | 896 | p = page; |
5c916a29 AD |
897 | while (p - page < 256) { |
898 | if (*p == '\0' || *p == '\n') { | |
899 | *p = '\n'; | |
1da177e4 LT |
900 | break; |
901 | } | |
902 | p++; | |
1da177e4 | 903 | |
1da177e4 | 904 | } |
5c916a29 AD |
905 | seq_write(m, page, p - page); |
906 | kfree(page); | |
907 | return 0; | |
908 | } | |
909 | ||
910 | static int mf_cmdline_proc_open(struct inode *inode, struct file *file) | |
911 | { | |
912 | return single_open(file, mf_cmdline_proc_show, PDE(inode)->data); | |
1da177e4 LT |
913 | } |
914 | ||
915 | #if 0 | |
916 | static int mf_getVmlinuxChunk(char *buffer, int *size, int offset, u64 side) | |
917 | { | |
918 | struct vsp_cmd_data vsp_cmd; | |
919 | int rc; | |
920 | int len = *size; | |
921 | dma_addr_t dma_addr; | |
922 | ||
1670b2b2 | 923 | dma_addr = iseries_hv_map(buffer, len, DMA_FROM_DEVICE); |
1da177e4 LT |
924 | memset(buffer, 0, len); |
925 | memset(&vsp_cmd, 0, sizeof(vsp_cmd)); | |
926 | vsp_cmd.cmd = 32; | |
927 | vsp_cmd.sub_data.kern.token = dma_addr; | |
928 | vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex; | |
929 | vsp_cmd.sub_data.kern.side = side; | |
930 | vsp_cmd.sub_data.kern.offset = offset; | |
931 | vsp_cmd.sub_data.kern.length = len; | |
932 | mb(); | |
933 | rc = signal_vsp_instruction(&vsp_cmd); | |
934 | if (rc == 0) { | |
935 | if (vsp_cmd.result_code == 0) | |
936 | *size = vsp_cmd.sub_data.length_out; | |
937 | else | |
938 | rc = -ENOMEM; | |
939 | } | |
940 | ||
1670b2b2 | 941 | iseries_hv_unmap(dma_addr, len, DMA_FROM_DEVICE); |
1da177e4 LT |
942 | |
943 | return rc; | |
944 | } | |
945 | ||
946 | static int proc_mf_dump_vmlinux(char *page, char **start, off_t off, | |
947 | int count, int *eof, void *data) | |
948 | { | |
949 | int sizeToGet = count; | |
950 | ||
951 | if (!capable(CAP_SYS_ADMIN)) | |
952 | return -EACCES; | |
953 | ||
954 | if (mf_getVmlinuxChunk(page, &sizeToGet, off, (u64)data) == 0) { | |
955 | if (sizeToGet != 0) { | |
956 | *start = page + off; | |
957 | return sizeToGet; | |
958 | } | |
959 | *eof = 1; | |
960 | return 0; | |
961 | } | |
962 | *eof = 1; | |
963 | return 0; | |
964 | } | |
965 | #endif | |
966 | ||
5c916a29 | 967 | static int mf_side_proc_show(struct seq_file *m, void *v) |
1da177e4 | 968 | { |
1da177e4 LT |
969 | char mf_current_side = ' '; |
970 | struct vsp_cmd_data vsp_cmd; | |
971 | ||
972 | memset(&vsp_cmd, 0, sizeof(vsp_cmd)); | |
973 | vsp_cmd.cmd = 2; | |
974 | vsp_cmd.sub_data.ipl_type = 0; | |
975 | mb(); | |
976 | ||
977 | if (signal_vsp_instruction(&vsp_cmd) == 0) { | |
978 | if (vsp_cmd.result_code == 0) { | |
979 | switch (vsp_cmd.sub_data.ipl_type) { | |
980 | case 0: mf_current_side = 'A'; | |
981 | break; | |
982 | case 1: mf_current_side = 'B'; | |
983 | break; | |
984 | case 2: mf_current_side = 'C'; | |
985 | break; | |
986 | default: mf_current_side = 'D'; | |
987 | break; | |
988 | } | |
989 | } | |
990 | } | |
991 | ||
5c916a29 AD |
992 | seq_printf(m, "%c\n", mf_current_side); |
993 | return 0; | |
994 | } | |
1da177e4 | 995 | |
5c916a29 AD |
996 | static int mf_side_proc_open(struct inode *inode, struct file *file) |
997 | { | |
998 | return single_open(file, mf_side_proc_show, NULL); | |
1da177e4 LT |
999 | } |
1000 | ||
5c916a29 AD |
1001 | static ssize_t mf_side_proc_write(struct file *file, const char __user *buffer, |
1002 | size_t count, loff_t *pos) | |
1da177e4 LT |
1003 | { |
1004 | char side; | |
1005 | u64 newSide; | |
1006 | struct vsp_cmd_data vsp_cmd; | |
1007 | ||
1008 | if (!capable(CAP_SYS_ADMIN)) | |
1009 | return -EACCES; | |
1010 | ||
1011 | if (count == 0) | |
1012 | return 0; | |
1013 | ||
1014 | if (get_user(side, buffer)) | |
1015 | return -EFAULT; | |
1016 | ||
1017 | switch (side) { | |
1018 | case 'A': newSide = 0; | |
1019 | break; | |
1020 | case 'B': newSide = 1; | |
1021 | break; | |
1022 | case 'C': newSide = 2; | |
1023 | break; | |
1024 | case 'D': newSide = 3; | |
1025 | break; | |
1026 | default: | |
1027 | printk(KERN_ERR "mf_proc.c: proc_mf_change_side: invalid side\n"); | |
1028 | return -EINVAL; | |
1029 | } | |
1030 | ||
1031 | memset(&vsp_cmd, 0, sizeof(vsp_cmd)); | |
1032 | vsp_cmd.sub_data.ipl_type = newSide; | |
1033 | vsp_cmd.cmd = 10; | |
1034 | ||
1035 | (void)signal_vsp_instruction(&vsp_cmd); | |
1036 | ||
1037 | return count; | |
1038 | } | |
1039 | ||
5c916a29 AD |
1040 | static const struct file_operations mf_side_proc_fops = { |
1041 | .owner = THIS_MODULE, | |
1042 | .open = mf_side_proc_open, | |
1043 | .read = seq_read, | |
1044 | .llseek = seq_lseek, | |
1045 | .release = single_release, | |
1046 | .write = mf_side_proc_write, | |
1047 | }; | |
1048 | ||
5c916a29 | 1049 | static int mf_src_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1050 | { |
1da177e4 | 1051 | return 0; |
1da177e4 LT |
1052 | } |
1053 | ||
5c916a29 AD |
1054 | static int mf_src_proc_open(struct inode *inode, struct file *file) |
1055 | { | |
1056 | return single_open(file, mf_src_proc_show, NULL); | |
1057 | } | |
1058 | ||
1059 | static ssize_t mf_src_proc_write(struct file *file, const char __user *buffer, | |
1060 | size_t count, loff_t *pos) | |
1da177e4 LT |
1061 | { |
1062 | char stkbuf[10]; | |
1063 | ||
1064 | if (!capable(CAP_SYS_ADMIN)) | |
1065 | return -EACCES; | |
1066 | ||
1067 | if ((count < 4) && (count != 1)) { | |
1068 | printk(KERN_ERR "mf_proc: invalid src\n"); | |
1069 | return -EINVAL; | |
1070 | } | |
1071 | ||
1072 | if (count > (sizeof(stkbuf) - 1)) | |
1073 | count = sizeof(stkbuf) - 1; | |
1074 | if (copy_from_user(stkbuf, buffer, count)) | |
1075 | return -EFAULT; | |
1076 | ||
1077 | if ((count == 1) && (*stkbuf == '\0')) | |
1078 | mf_clear_src(); | |
1079 | else | |
1080 | mf_display_src(*(u32 *)stkbuf); | |
1081 | ||
1082 | return count; | |
1083 | } | |
1084 | ||
5c916a29 AD |
1085 | static const struct file_operations mf_src_proc_fops = { |
1086 | .owner = THIS_MODULE, | |
1087 | .open = mf_src_proc_open, | |
1088 | .read = seq_read, | |
1089 | .llseek = seq_lseek, | |
1090 | .release = single_release, | |
1091 | .write = mf_src_proc_write, | |
1092 | }; | |
1093 | ||
1094 | static ssize_t mf_cmdline_proc_write(struct file *file, const char __user *buffer, | |
1095 | size_t count, loff_t *pos) | |
1da177e4 | 1096 | { |
5c916a29 | 1097 | void *data = PDE(file->f_path.dentry->d_inode)->data; |
1da177e4 LT |
1098 | struct vsp_cmd_data vsp_cmd; |
1099 | dma_addr_t dma_addr; | |
1100 | char *page; | |
1101 | int ret = -EACCES; | |
1102 | ||
1103 | if (!capable(CAP_SYS_ADMIN)) | |
1104 | goto out; | |
1105 | ||
1106 | dma_addr = 0; | |
1670b2b2 | 1107 | page = iseries_hv_alloc(count, &dma_addr, GFP_ATOMIC); |
1da177e4 LT |
1108 | ret = -ENOMEM; |
1109 | if (page == NULL) | |
1110 | goto out; | |
1111 | ||
1112 | ret = -EFAULT; | |
1113 | if (copy_from_user(page, buffer, count)) | |
1114 | goto out_free; | |
1115 | ||
1116 | memset(&vsp_cmd, 0, sizeof(vsp_cmd)); | |
1117 | vsp_cmd.cmd = 31; | |
1118 | vsp_cmd.sub_data.kern.token = dma_addr; | |
1119 | vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex; | |
1120 | vsp_cmd.sub_data.kern.side = (u64)data; | |
1121 | vsp_cmd.sub_data.kern.length = count; | |
1122 | mb(); | |
1123 | (void)signal_vsp_instruction(&vsp_cmd); | |
1124 | ret = count; | |
1125 | ||
1126 | out_free: | |
1670b2b2 | 1127 | iseries_hv_free(count, page, dma_addr); |
1da177e4 LT |
1128 | out: |
1129 | return ret; | |
1130 | } | |
1131 | ||
5c916a29 AD |
1132 | static const struct file_operations mf_cmdline_proc_fops = { |
1133 | .owner = THIS_MODULE, | |
1134 | .open = mf_cmdline_proc_open, | |
1135 | .read = seq_read, | |
1136 | .llseek = seq_lseek, | |
1137 | .release = single_release, | |
1138 | .write = mf_cmdline_proc_write, | |
1139 | }; | |
1140 | ||
1da177e4 LT |
1141 | static ssize_t proc_mf_change_vmlinux(struct file *file, |
1142 | const char __user *buf, | |
1143 | size_t count, loff_t *ppos) | |
1144 | { | |
b4d1ab58 | 1145 | struct proc_dir_entry *dp = PDE(file->f_path.dentry->d_inode); |
1da177e4 LT |
1146 | ssize_t rc; |
1147 | dma_addr_t dma_addr; | |
1148 | char *page; | |
1149 | struct vsp_cmd_data vsp_cmd; | |
1150 | ||
1151 | rc = -EACCES; | |
1152 | if (!capable(CAP_SYS_ADMIN)) | |
1153 | goto out; | |
1154 | ||
1155 | dma_addr = 0; | |
1670b2b2 | 1156 | page = iseries_hv_alloc(count, &dma_addr, GFP_ATOMIC); |
1da177e4 LT |
1157 | rc = -ENOMEM; |
1158 | if (page == NULL) { | |
1159 | printk(KERN_ERR "mf.c: couldn't allocate memory to set vmlinux chunk\n"); | |
1160 | goto out; | |
1161 | } | |
1162 | rc = -EFAULT; | |
1163 | if (copy_from_user(page, buf, count)) | |
1164 | goto out_free; | |
1165 | ||
1166 | memset(&vsp_cmd, 0, sizeof(vsp_cmd)); | |
1167 | vsp_cmd.cmd = 30; | |
1168 | vsp_cmd.sub_data.kern.token = dma_addr; | |
1169 | vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex; | |
1170 | vsp_cmd.sub_data.kern.side = (u64)dp->data; | |
1171 | vsp_cmd.sub_data.kern.offset = *ppos; | |
1172 | vsp_cmd.sub_data.kern.length = count; | |
1173 | mb(); | |
1174 | rc = signal_vsp_instruction(&vsp_cmd); | |
1175 | if (rc) | |
1176 | goto out_free; | |
1177 | rc = -ENOMEM; | |
1178 | if (vsp_cmd.result_code != 0) | |
1179 | goto out_free; | |
1180 | ||
1181 | *ppos += count; | |
1182 | rc = count; | |
1183 | out_free: | |
1670b2b2 | 1184 | iseries_hv_free(count, page, dma_addr); |
1da177e4 LT |
1185 | out: |
1186 | return rc; | |
1187 | } | |
1188 | ||
5dfe4c96 | 1189 | static const struct file_operations proc_vmlinux_operations = { |
1da177e4 | 1190 | .write = proc_mf_change_vmlinux, |
6038f373 | 1191 | .llseek = default_llseek, |
1da177e4 LT |
1192 | }; |
1193 | ||
1194 | static int __init mf_proc_init(void) | |
1195 | { | |
1196 | struct proc_dir_entry *mf_proc_root; | |
1197 | struct proc_dir_entry *ent; | |
1198 | struct proc_dir_entry *mf; | |
1199 | char name[2]; | |
1200 | int i; | |
1201 | ||
d9523aa1 SR |
1202 | if (!firmware_has_feature(FW_FEATURE_ISERIES)) |
1203 | return 0; | |
1204 | ||
1da177e4 LT |
1205 | mf_proc_root = proc_mkdir("iSeries/mf", NULL); |
1206 | if (!mf_proc_root) | |
1207 | return 1; | |
1208 | ||
1209 | name[1] = '\0'; | |
1210 | for (i = 0; i < 4; i++) { | |
1211 | name[0] = 'A' + i; | |
1212 | mf = proc_mkdir(name, mf_proc_root); | |
1213 | if (!mf) | |
1214 | return 1; | |
1215 | ||
5c916a29 AD |
1216 | ent = proc_create_data("cmdline", S_IRUSR|S_IWUSR, mf, |
1217 | &mf_cmdline_proc_fops, (void *)(long)i); | |
1da177e4 LT |
1218 | if (!ent) |
1219 | return 1; | |
1da177e4 LT |
1220 | |
1221 | if (i == 3) /* no vmlinux entry for 'D' */ | |
1222 | continue; | |
1223 | ||
66747138 DL |
1224 | ent = proc_create_data("vmlinux", S_IFREG|S_IWUSR, mf, |
1225 | &proc_vmlinux_operations, | |
1226 | (void *)(long)i); | |
1da177e4 LT |
1227 | if (!ent) |
1228 | return 1; | |
1da177e4 LT |
1229 | } |
1230 | ||
5c916a29 AD |
1231 | ent = proc_create("side", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root, |
1232 | &mf_side_proc_fops); | |
1da177e4 LT |
1233 | if (!ent) |
1234 | return 1; | |
1da177e4 | 1235 | |
5c916a29 AD |
1236 | ent = proc_create("src", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root, |
1237 | &mf_src_proc_fops); | |
1da177e4 LT |
1238 | if (!ent) |
1239 | return 1; | |
1da177e4 LT |
1240 | |
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | __initcall(mf_proc_init); | |
1245 | ||
1246 | #endif /* CONFIG_PROC_FS */ | |
c8b84976 SR |
1247 | |
1248 | /* | |
1249 | * Get the RTC from the virtual service processor | |
1250 | * This requires flowing LpEvents to the primary partition | |
1251 | */ | |
1252 | void iSeries_get_rtc_time(struct rtc_time *rtc_tm) | |
1253 | { | |
c8b84976 SR |
1254 | mf_get_rtc(rtc_tm); |
1255 | rtc_tm->tm_mon--; | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * Set the RTC in the virtual service processor | |
1260 | * This requires flowing LpEvents to the primary partition | |
1261 | */ | |
1262 | int iSeries_set_rtc_time(struct rtc_time *tm) | |
1263 | { | |
1264 | mf_set_rtc(tm); | |
1265 | return 0; | |
1266 | } | |
1267 | ||
143a1dec | 1268 | unsigned long iSeries_get_boot_time(void) |
c8b84976 | 1269 | { |
143a1dec PM |
1270 | struct rtc_time tm; |
1271 | ||
143a1dec PM |
1272 | mf_get_boot_rtc(&tm); |
1273 | return mktime(tm.tm_year + 1900, tm.tm_mon, tm.tm_mday, | |
1274 | tm.tm_hour, tm.tm_min, tm.tm_sec); | |
c8b84976 | 1275 | } |