/* * Copyright (C) 2001 Troy D. Armstrong IBM Corporation * Copyright (C) 2004-2005 Stephen Rothwell IBM Corporation * * This modules exists as an interface between a Linux secondary partition * running on an iSeries and the primary partition's Virtual Service * Processor (VSP) object. The VSP has final authority over powering on/off * all partitions in the iSeries. It also provides miscellaneous low-level * machine facility type operations. * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/types.h> #include <linux/errno.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/bcd.h> #include <linux/rtc.h> #include <asm/time.h> #include <asm/uaccess.h> #include <asm/paca.h> #include <asm/abs_addr.h> #include <asm/iseries/vio.h> #include <asm/iseries/mf.h> #include <asm/iseries/hv_lp_config.h> #include <asm/iseries/it_lp_queue.h> #include "setup.h" extern int piranha_simulator; /* * This is the structure layout for the Machine Facilites LPAR event * flows. */ struct vsp_cmd_data { u64 token; u16 cmd; HvLpIndex lp_index; u8 result_code; u32 reserved; union { u64 state; /* GetStateOut */ u64 ipl_type; /* GetIplTypeOut, Function02SelectIplTypeIn */ u64 ipl_mode; /* GetIplModeOut, Function02SelectIplModeIn */ u64 page[4]; /* GetSrcHistoryIn */ u64 flag; /* GetAutoIplWhenPrimaryIplsOut, SetAutoIplWhenPrimaryIplsIn, WhiteButtonPowerOffIn, Function08FastPowerOffIn, IsSpcnRackPowerIncompleteOut */ struct { u64 token; u64 address_type; u64 side; u32 length; u32 offset; } kern; /* SetKernelImageIn, GetKernelImageIn, SetKernelCmdLineIn, GetKernelCmdLineIn */ u32 length_out; /* GetKernelImageOut, GetKernelCmdLineOut */ u8 reserved[80]; } sub_data; }; struct vsp_rsp_data { struct completion com; struct vsp_cmd_data *response; }; struct alloc_data { u16 size; u16 type; u32 count; u16 reserved1; u8 reserved2; HvLpIndex target_lp; }; struct ce_msg_data; typedef void (*ce_msg_comp_hdlr)(void *token, struct ce_msg_data *vsp_cmd_rsp); struct ce_msg_comp_data { ce_msg_comp_hdlr handler; void *token; }; struct ce_msg_data { u8 ce_msg[12]; char reserved[4]; struct ce_msg_comp_data *completion; }; struct io_mf_lp_event { struct HvLpEvent hp_lp_event; u16 subtype_result_code; u16 reserved1; u32 reserved2; union { struct alloc_data alloc; struct ce_msg_data ce_msg; struct vsp_cmd_data vsp_cmd; } data; }; #define subtype_data(a, b, c, d) \ (((a) << 24) + ((b) << 16) + ((c) << 8) + (d)) /* * All outgoing event traffic is kept on a FIFO queue. The first * pointer points to the one that is outstanding, and all new * requests get stuck on the end. Also, we keep a certain number of * preallocated pending events so that we can operate very early in * the boot up sequence (before kmalloc is ready). */ struct pending_event { struct pending_event *next; struct io_mf_lp_event event; MFCompleteHandler hdlr; char dma_data[72]; unsigned dma_data_length; unsigned remote_address; }; static spinlock_t pending_event_spinlock; static struct pending_event *pending_event_head; static struct pending_event *pending_event_tail; static struct pending_event *pending_event_avail; static struct pending_event pending_event_prealloc[16]; /* * Put a pending event onto the available queue, so it can get reused. * Attention! You must have the pending_event_spinlock before calling! */ static void free_pending_event(struct pending_event *ev) { if (ev != NULL) { ev->next = pending_event_avail; pending_event_avail = ev; } } /* * Enqueue the outbound event onto the stack. If the queue was * empty to begin with, we must also issue it via the Hypervisor * interface. There is a section of code below that will touch * the first stack pointer without the protection of the pending_event_spinlock. * This is OK, because we know that nobody else will be modifying * the first pointer when we do this. */ static int signal_event(struct pending_event *ev) { int rc = 0; unsigned long flags; int go = 1; struct pending_event *ev1; HvLpEvent_Rc hv_rc; /* enqueue the event */ if (ev != NULL) { ev->next = NULL; spin_lock_irqsave(&pending_event_spinlock, flags); if (pending_event_head == NULL) pending_event_head = ev; else { go = 0; pending_event_tail->next = ev; } pending_event_tail = ev; spin_unlock_irqrestore(&pending_event_spinlock, flags); } /* send the event */ while (go) { go = 0; /* any DMA data to send beforehand? */ if (pending_event_head->dma_data_length > 0) HvCallEvent_dmaToSp(pending_event_head->dma_data, pending_event_head->remote_address, pending_event_head->dma_data_length, HvLpDma_Direction_LocalToRemote); hv_rc = HvCallEvent_signalLpEvent( &pending_event_head->event.hp_lp_event); if (hv_rc != HvLpEvent_Rc_Good) { printk(KERN_ERR "mf.c: HvCallEvent_signalLpEvent() " "failed with %d\n", (int)hv_rc); spin_lock_irqsave(&pending_event_spinlock, flags); ev1 = pending_event_head; pending_event_head = pending_event_head->next; if (pending_event_head != NULL) go = 1; spin_unlock_irqrestore(&pending_event_spinlock, flags); if (ev1 == ev) rc = -EIO; else if (ev1->hdlr != NULL) (*ev1->hdlr)((void *)ev1->event.hp_lp_event.xCorrelationToken, -EIO); spin_lock_irqsave(&pending_event_spinlock, flags); free_pending_event(ev1); spin_unlock_irqrestore(&pending_event_spinlock, flags); } } return rc; } /* * Allocate a new pending_event structure, and initialize it. */ static struct pending_event *new_pending_event(void) { struct pending_event *ev = NULL; HvLpIndex primary_lp = HvLpConfig_getPrimaryLpIndex(); unsigned long flags; struct HvLpEvent *hev; spin_lock_irqsave(&pending_event_spinlock, flags); if (pending_event_avail != NULL) { ev = pending_event_avail; pending_event_avail = pending_event_avail->next; } spin_unlock_irqrestore(&pending_event_spinlock, flags); if (ev == NULL) { ev = kmalloc(sizeof(struct pending_event), GFP_ATOMIC); if (ev == NULL) { printk(KERN_ERR "mf.c: unable to kmalloc %ld bytes\n", sizeof(struct pending_event)); return NULL; } } memset(ev, 0, sizeof(struct pending_event)); hev = &ev->event.hp_lp_event; hev->xFlags.xValid = 1; hev->xFlags.xAckType = HvLpEvent_AckType_ImmediateAck; hev->xFlags.xAckInd = HvLpEvent_AckInd_DoAck; hev->xFlags.xFunction = HvLpEvent_Function_Int; hev->xType = HvLpEvent_Type_MachineFac; hev->xSourceLp = HvLpConfig_getLpIndex(); hev->xTargetLp = primary_lp; hev->xSizeMinus1 = sizeof(ev->event) - 1; hev->xRc = HvLpEvent_Rc_Good; hev->xSourceInstanceId = HvCallEvent_getSourceLpInstanceId(primary_lp, HvLpEvent_Type_MachineFac); hev->xTargetInstanceId = HvCallEvent_getTargetLpInstanceId(primary_lp, HvLpEvent_Type_MachineFac); return ev; } static int signal_vsp_instruction(struct vsp_cmd_data *vsp_cmd) { struct pending_event *ev = new_pending_event(); int rc; struct vsp_rsp_data response; if (ev == NULL) return -ENOMEM; init_completion(&response.com); response.response = vsp_cmd; ev->event.hp_lp_event.xSubtype = 6; ev->event.hp_lp_event.x.xSubtypeData = subtype_data('M', 'F', 'V', 'I'); ev->event.data.vsp_cmd.token = (u64)&response; ev->event.data.vsp_cmd.cmd = vsp_cmd->cmd; ev->event.data.vsp_cmd.lp_index = HvLpConfig_getLpIndex(); ev->event.data.vsp_cmd.result_code = 0xFF; ev->event.data.vsp_cmd.reserved = 0; memcpy(&(ev->event.data.vsp_cmd.sub_data), &(vsp_cmd->sub_data), sizeof(vsp_cmd->sub_data)); mb(); rc = signal_event(ev); if (rc == 0) wait_for_completion(&response.com); return rc; } /* * Send a 12-byte CE message to the primary partition VSP object */ static int signal_ce_msg(char *ce_msg, struct ce_msg_comp_data *completion) { struct pending_event *ev = new_pending_event(); if (ev == NULL) return -ENOMEM; ev->event.hp_lp_event.xSubtype = 0; ev->event.hp_lp_event.x.xSubtypeData = subtype_data('M', 'F', 'C', 'E'); memcpy(ev->event.data.ce_msg.ce_msg, ce_msg, 12); ev->event.data.ce_msg.completion = completion; return signal_event(ev); } /* * Send a 12-byte CE message (with no data) to the primary partition VSP object */ static int signal_ce_msg_simple(u8 ce_op, struct ce_msg_comp_data *completion) { u8 ce_msg[12]; memset(ce_msg, 0, sizeof(ce_msg)); ce_msg[3] = ce_op; return signal_ce_msg(ce_msg, completion); } /* * Send a 12-byte CE message and DMA data to the primary partition VSP object */ static int dma_and_signal_ce_msg(char *ce_msg, struct ce_msg_comp_data *completion, void *dma_data, unsigned dma_data_length, unsigned remote_address) { struct pending_event *ev = new_pending_event(); if (ev == NULL) return -ENOMEM; ev->event.hp_lp_event.xSubtype = 0; ev->event.hp_lp_event.x.xSubtypeData = subtype_data('M', 'F', 'C', 'E'); memcpy(ev->event.data.ce_msg.ce_msg, ce_msg, 12); ev->event.data.ce_msg.completion = completion; memcpy(ev->dma_data, dma_data, dma_data_length); ev->dma_data_length = dma_data_length; ev->remote_address = remote_address; return signal_event(ev); } /* * Initiate a nice (hopefully) shutdown of Linux. We simply are * going to try and send the init process a SIGINT signal. If * this fails (why?), we'll simply force it off in a not-so-nice * manner. */ static int shutdown(void) { int rc = kill_proc(1, SIGINT, 1); if (rc) { printk(KERN_ALERT "mf.c: SIGINT to init failed (%d), " "hard shutdown commencing\n", rc); mf_power_off(); } else printk(KERN_INFO "mf.c: init has been successfully notified " "to proceed with shutdown\n"); return rc; } /* * The primary partition VSP object is sending us a new * event flow. Handle it... */ static void handle_int(struct io_mf_lp_event *event) { struct ce_msg_data *ce_msg_data; struct ce_msg_data *pce_msg_data; unsigned long flags; struct pending_event *pev; /* ack the interrupt */ event->hp_lp_event.xRc = HvLpEvent_Rc_Good; HvCallEvent_ackLpEvent(&event->hp_lp_event); /* process interrupt */ switch (event->hp_lp_event.xSubtype) { case 0: /* CE message */ ce_msg_data = &event->data.ce_msg; switch (ce_msg_data->ce_msg[3]) { case 0x5B: /* power control notification */ if ((ce_msg_data->ce_msg[5] & 0x20) != 0) { printk(KERN_INFO "mf.c: Commencing partition shutdown\n"); if (shutdown() == 0) signal_ce_msg_simple(0xDB, NULL); } break; case 0xC0: /* get time */ spin_lock_irqsave(&pending_event_spinlock, flags); pev = pending_event_head; if (pev != NULL) pending_event_head = pending_event_head->next; spin_unlock_irqrestore(&pending_event_spinlock, flags); if (pev == NULL) break; pce_msg_data = &pev->event.data.ce_msg; if (pce_msg_data->ce_msg[3] != 0x40) break; if (pce_msg_data->completion != NULL) { ce_msg_comp_hdlr handler = pce_msg_data->completion->handler; void *token = pce_msg_data->completion->token; if (handler != NULL) (*handler)(token, ce_msg_data); } spin_lock_irqsave(&pending_event_spinlock, flags); free_pending_event(pev); spin_unlock_irqrestore(&pending_event_spinlock, flags); /* send next waiting event */ if (pending_event_head != NULL) signal_event(NULL); break; } break; case 1: /* IT sys shutdown */ printk(KERN_INFO "mf.c: Commencing system shutdown\n"); shutdown(); break; } } /* * The primary partition VSP object is acknowledging the receipt * of a flow we sent to them. If there are other flows queued * up, we must send another one now... */ static void handle_ack(struct io_mf_lp_event *event) { unsigned long flags; struct pending_event *two = NULL; unsigned long free_it = 0; struct ce_msg_data *ce_msg_data; struct ce_msg_data *pce_msg_data; struct vsp_rsp_data *rsp; /* handle current event */ if (pending_event_head == NULL) { printk(KERN_ERR "mf.c: stack empty for receiving ack\n"); return; } switch (event->hp_lp_event.xSubtype) { case 0: /* CE msg */ ce_msg_data = &event->data.ce_msg; if (ce_msg_data->ce_msg[3] != 0x40) { free_it = 1; break; } if (ce_msg_data->ce_msg[2] == 0) break; free_it = 1; pce_msg_data = &pending_event_head->event.data.ce_msg; if (pce_msg_data->completion != NULL) { ce_msg_comp_hdlr handler = pce_msg_data->completion->handler; void *token = pce_msg_data->completion->token; if (handler != NULL) (*handler)(token, ce_msg_data); } break; case 4: /* allocate */ case 5: /* deallocate */ if (pending_event_head->hdlr != NULL) (*pending_event_head->hdlr)((void *)event->hp_lp_event.xCorrelationToken, event->data.alloc.count); free_it = 1; break; case 6: free_it = 1; rsp = (struct vsp_rsp_data *)event->data.vsp_cmd.token; if (rsp == NULL) { printk(KERN_ERR "mf.c: no rsp\n"); break; } if (rsp->response != NULL) memcpy(rsp->response, &event->data.vsp_cmd, sizeof(event->data.vsp_cmd)); complete(&rsp->com); break; } /* remove from queue */ spin_lock_irqsave(&pending_event_spinlock, flags); if ((pending_event_head != NULL) && (free_it == 1)) { struct pending_event *oldHead = pending_event_head; pending_event_head = pending_event_head->next; two = pending_event_head; free_pending_event(oldHead); } spin_unlock_irqrestore(&pending_event_spinlock, flags); /* send next waiting event */ if (two != NULL) signal_event(NULL); } /* * This is the generic event handler we are registering with * the Hypervisor. Ensure the flows are for us, and then * parse it enough to know if it is an interrupt or an * acknowledge. */ static void hv_handler(struct HvLpEvent *event, struct pt_regs *regs) { if ((event != NULL) && (event->xType == HvLpEvent_Type_MachineFac)) { switch(event->xFlags.xFunction) { case HvLpEvent_Function_Ack: handle_ack((struct io_mf_lp_event *)event); break; case HvLpEvent_Function_Int: handle_int((struct io_mf_lp_event *)event); break; default: printk(KERN_ERR "mf.c: non ack/int event received\n"); break; } } else printk(KERN_ERR "mf.c: alien event received\n"); } /* * Global kernel interface to allocate and seed events into the * Hypervisor. */ void mf_allocate_lp_events(HvLpIndex target_lp, HvLpEvent_Type type, unsigned size, unsigned count, MFCompleteHandler hdlr, void *user_token) { struct pending_event *ev = new_pending_event(); int rc; if (ev == NULL) { rc = -ENOMEM; } else { ev->event.hp_lp_event.xSubtype = 4; ev->event.hp_lp_event.xCorrelationToken = (u64)user_token; ev->event.hp_lp_event.x.xSubtypeData = subtype_data('M', 'F', 'M', 'A'); ev->event.data.alloc.target_lp = target_lp; ev->event.data.alloc.type = type; ev->event.data.alloc.size = size; ev->event.data.alloc.count = count; ev->hdlr = hdlr; rc = signal_event(ev); } if ((rc != 0) && (hdlr != NULL)) (*hdlr)(user_token, rc); } EXPORT_SYMBOL(mf_allocate_lp_events); /* * Global kernel interface to unseed and deallocate events already in * Hypervisor. */ void mf_deallocate_lp_events(HvLpIndex target_lp, HvLpEvent_Type type, unsigned count, MFCompleteHandler hdlr, void *user_token) { struct pending_event *ev = new_pending_event(); int rc; if (ev == NULL) rc = -ENOMEM; else { ev->event.hp_lp_event.xSubtype = 5; ev->event.hp_lp_event.xCorrelationToken = (u64)user_token; ev->event.hp_lp_event.x.xSubtypeData = subtype_data('M', 'F', 'M', 'D'); ev->event.data.alloc.target_lp = target_lp; ev->event.data.alloc.type = type; ev->event.data.alloc.count = count; ev->hdlr = hdlr; rc = signal_event(ev); } if ((rc != 0) && (hdlr != NULL)) (*hdlr)(user_token, rc); } EXPORT_SYMBOL(mf_deallocate_lp_events); /* * Global kernel interface to tell the VSP object in the primary * partition to power this partition off. */ void mf_power_off(void) { printk(KERN_INFO "mf.c: Down it goes...\n"); signal_ce_msg_simple(0x4d, NULL); for (;;) ; } /* * Global kernel interface to tell the VSP object in the primary * partition to reboot this partition. */ void mf_reboot(void) { printk(KERN_INFO "mf.c: Preparing to bounce...\n"); signal_ce_msg_simple(0x4e, NULL); for (;;) ; } /* * Display a single word SRC onto the VSP control panel. */ void mf_display_src(u32 word) { u8 ce[12]; memset(ce, 0, sizeof(ce)); ce[3] = 0x4a; ce[7] = 0x01; ce[8] = word >> 24; ce[9] = word >> 16; ce[10] = word >> 8; ce[11] = word; signal_ce_msg(ce, NULL); } /* * Display a single word SRC of the form "PROGXXXX" on the VSP control panel. */ void mf_display_progress(u16 value) { u8 ce[12]; u8 src[72]; memcpy(ce, "\x00\x00\x04\x4A\x00\x00\x00\x48\x00\x00\x00\x00", 12); memcpy(src, "\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00PROGxxxx ", 72); src[6] = value >> 8; src[7] = value & 255; src[44] = "0123456789ABCDEF"[(value >> 12) & 15]; src[45] = "0123456789ABCDEF"[(value >> 8) & 15]; src[46] = "0123456789ABCDEF"[(value >> 4) & 15]; src[47] = "0123456789ABCDEF"[value & 15]; dma_and_signal_ce_msg(ce, NULL, src, sizeof(src), 9 * 64 * 1024); } /* * Clear the VSP control panel. Used to "erase" an SRC that was * previously displayed. */ void mf_clear_src(void) { signal_ce_msg_simple(0x4b, NULL); } /* * Initialization code here. */ void mf_init(void) { int i; /* initialize */ spin_lock_init(&pending_event_spinlock); for (i = 0; i < sizeof(pending_event_prealloc) / sizeof(*pending_event_prealloc); ++i) free_pending_event(&pending_event_prealloc[i]); HvLpEvent_registerHandler(HvLpEvent_Type_MachineFac, &hv_handler); /* virtual continue ack */ signal_ce_msg_simple(0x57, NULL); /* initialization complete */ printk(KERN_NOTICE "mf.c: iSeries Linux LPAR Machine Facilities " "initialized\n"); } struct rtc_time_data { struct completion com; struct ce_msg_data ce_msg; int rc; }; static void get_rtc_time_complete(void *token, struct ce_msg_data *ce_msg) { struct rtc_time_data *rtc = token; memcpy(&rtc->ce_msg, ce_msg, sizeof(rtc->ce_msg)); rtc->rc = 0; complete(&rtc->com); } static int rtc_set_tm(int rc, u8 *ce_msg, struct rtc_time *tm) { tm->tm_wday = 0; tm->tm_yday = 0; tm->tm_isdst = 0; if (rc) { tm->tm_sec = 0; tm->tm_min = 0; tm->tm_hour = 0; tm->tm_mday = 15; tm->tm_mon = 5; tm->tm_year = 52; return rc; } if ((ce_msg[2] == 0xa9) || (ce_msg[2] == 0xaf)) { /* TOD clock is not set */ tm->tm_sec = 1; tm->tm_min = 1; tm->tm_hour = 1; tm->tm_mday = 10; tm->tm_mon = 8; tm->tm_year = 71; mf_set_rtc(tm); } { u8 year = ce_msg[5]; u8 sec = ce_msg[6]; u8 min = ce_msg[7]; u8 hour = ce_msg[8]; u8 day = ce_msg[10]; u8 mon = ce_msg[11]; BCD_TO_BIN(sec); BCD_TO_BIN(min); BCD_TO_BIN(hour); BCD_TO_BIN(day); BCD_TO_BIN(mon); BCD_TO_BIN(year); if (year <= 69) year += 100; tm->tm_sec = sec; tm->tm_min = min; tm->tm_hour = hour; tm->tm_mday = day; tm->tm_mon = mon; tm->tm_year = year; } return 0; } int mf_get_rtc(struct rtc_time *tm) { struct ce_msg_comp_data ce_complete; struct rtc_time_data rtc_data; int rc; memset(&ce_complete, 0, sizeof(ce_complete)); memset(&rtc_data, 0, sizeof(rtc_data)); init_completion(&rtc_data.com); ce_complete.handler = &get_rtc_time_complete; ce_complete.token = &rtc_data; rc = signal_ce_msg_simple(0x40, &ce_complete); if (rc) return rc; wait_for_completion(&rtc_data.com); return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm); } struct boot_rtc_time_data { int busy; struct ce_msg_data ce_msg; int rc; }; static void get_boot_rtc_time_complete(void *token, struct ce_msg_data *ce_msg) { struct boot_rtc_time_data *rtc = token; memcpy(&rtc->ce_msg, ce_msg, sizeof(rtc->ce_msg)); rtc->rc = 0; rtc->busy = 0; } int mf_get_boot_rtc(struct rtc_time *tm) { struct ce_msg_comp_data ce_complete; struct boot_rtc_time_data rtc_data; int rc; memset(&ce_complete, 0, sizeof(ce_complete)); memset(&rtc_data, 0, sizeof(rtc_data)); rtc_data.busy = 1; ce_complete.handler = &get_boot_rtc_time_complete; ce_complete.token = &rtc_data; rc = signal_ce_msg_simple(0x40, &ce_complete); if (rc) return rc; /* We need to poll here as we are not yet taking interrupts */ while (rtc_data.busy) { if (hvlpevent_is_pending()) process_hvlpevents(NULL); } return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm); } int mf_set_rtc(struct rtc_time *tm) { char ce_time[12]; u8 day, mon, hour, min, sec, y1, y2; unsigned year; year = 1900 + tm->tm_year; y1 = year / 100; y2 = year % 100; sec = tm->tm_sec; min = tm->tm_min; hour = tm->tm_hour; day = tm->tm_mday; mon = tm->tm_mon + 1; BIN_TO_BCD(sec); BIN_TO_BCD(min); BIN_TO_BCD(hour); BIN_TO_BCD(mon); BIN_TO_BCD(day); BIN_TO_BCD(y1); BIN_TO_BCD(y2); memset(ce_time, 0, sizeof(ce_time)); ce_time[3] = 0x41; ce_time[4] = y1; ce_time[5] = y2; ce_time[6] = sec; ce_time[7] = min; ce_time[8] = hour; ce_time[10] = day; ce_time[11] = mon; return signal_ce_msg(ce_time, NULL); } #ifdef CONFIG_PROC_FS static int proc_mf_dump_cmdline(char *page, char **start, off_t off, int count, int *eof, void *data) { int len; char *p; struct vsp_cmd_data vsp_cmd; int rc; dma_addr_t dma_addr; /* The HV appears to return no more than 256 bytes of command line */ if (off >= 256) return 0; if ((off + count) > 256) count = 256 - off; dma_addr = dma_map_single(iSeries_vio_dev, page, off + count, DMA_FROM_DEVICE); if (dma_mapping_error(dma_addr)) return -ENOMEM; memset(page, 0, off + count); memset(&vsp_cmd, 0, sizeof(vsp_cmd)); vsp_cmd.cmd = 33; vsp_cmd.sub_data.kern.token = dma_addr; vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex; vsp_cmd.sub_data.kern.side = (u64)data; vsp_cmd.sub_data.kern.length = off + count; mb(); rc = signal_vsp_instruction(&vsp_cmd); dma_unmap_single(iSeries_vio_dev, dma_addr, off + count, DMA_FROM_DEVICE); if (rc) return rc; if (vsp_cmd.result_code != 0) return -ENOMEM; p = page; len = 0; while (len < (off + count)) { if ((*p == '\0') || (*p == '\n')) { if (*p == '\0') *p = '\n'; p++; len++; *eof = 1; break; } p++; len++; } if (len < off) { *eof = 1; len = 0; } return len; } #if 0 static int mf_getVmlinuxChunk(char *buffer, int *size, int offset, u64 side) { struct vsp_cmd_data vsp_cmd; int rc; int len = *size; dma_addr_t dma_addr; dma_addr = dma_map_single(iSeries_vio_dev, buffer, len, DMA_FROM_DEVICE); memset(buffer, 0, len); memset(&vsp_cmd, 0, sizeof(vsp_cmd)); vsp_cmd.cmd = 32; vsp_cmd.sub_data.kern.token = dma_addr; vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex; vsp_cmd.sub_data.kern.side = side; vsp_cmd.sub_data.kern.offset = offset; vsp_cmd.sub_data.kern.length = len; mb(); rc = signal_vsp_instruction(&vsp_cmd); if (rc == 0) { if (vsp_cmd.result_code == 0) *size = vsp_cmd.sub_data.length_out; else rc = -ENOMEM; } dma_unmap_single(iSeries_vio_dev, dma_addr, len, DMA_FROM_DEVICE); return rc; } static int proc_mf_dump_vmlinux(char *page, char **start, off_t off, int count, int *eof, void *data) { int sizeToGet = count; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (mf_getVmlinuxChunk(page, &sizeToGet, off, (u64)data) == 0) { if (sizeToGet != 0) { *start = page + off; return sizeToGet; } *eof = 1; return 0; } *eof = 1; return 0; } #endif static int proc_mf_dump_side(char *page, char **start, off_t off, int count, int *eof, void *data) { int len; char mf_current_side = ' '; struct vsp_cmd_data vsp_cmd; memset(&vsp_cmd, 0, sizeof(vsp_cmd)); vsp_cmd.cmd = 2; vsp_cmd.sub_data.ipl_type = 0; mb(); if (signal_vsp_instruction(&vsp_cmd) == 0) { if (vsp_cmd.result_code == 0) { switch (vsp_cmd.sub_data.ipl_type) { case 0: mf_current_side = 'A'; break; case 1: mf_current_side = 'B'; break; case 2: mf_current_side = 'C'; break; default: mf_current_side = 'D'; break; } } } len = sprintf(page, "%c\n", mf_current_side); if (len <= (off + count)) *eof = 1; *start = page + off; len -= off; if (len > count) len = count; if (len < 0) len = 0; return len; } static int proc_mf_change_side(struct file *file, const char __user *buffer, unsigned long count, void *data) { char side; u64 newSide; struct vsp_cmd_data vsp_cmd; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (count == 0) return 0; if (get_user(side, buffer)) return -EFAULT; switch (side) { case 'A': newSide = 0; break; case 'B': newSide = 1; break; case 'C': newSide = 2; break; case 'D': newSide = 3; break; default: printk(KERN_ERR "mf_proc.c: proc_mf_change_side: invalid side\n"); return -EINVAL; } memset(&vsp_cmd, 0, sizeof(vsp_cmd)); vsp_cmd.sub_data.ipl_type = newSide; vsp_cmd.cmd = 10; (void)signal_vsp_instruction(&vsp_cmd); return count; } #if 0 static void mf_getSrcHistory(char *buffer, int size) { struct IplTypeReturnStuff return_stuff; struct pending_event *ev = new_pending_event(); int rc = 0; char *pages[4]; pages[0] = kmalloc(4096, GFP_ATOMIC); pages[1] = kmalloc(4096, GFP_ATOMIC); pages[2] = kmalloc(4096, GFP_ATOMIC); pages[3] = kmalloc(4096, GFP_ATOMIC); if ((ev == NULL) || (pages[0] == NULL) || (pages[1] == NULL) || (pages[2] == NULL) || (pages[3] == NULL)) return -ENOMEM; return_stuff.xType = 0; return_stuff.xRc = 0; return_stuff.xDone = 0; ev->event.hp_lp_event.xSubtype = 6; ev->event.hp_lp_event.x.xSubtypeData = subtype_data('M', 'F', 'V', 'I'); ev->event.data.vsp_cmd.xEvent = &return_stuff; ev->event.data.vsp_cmd.cmd = 4; ev->event.data.vsp_cmd.lp_index = HvLpConfig_getLpIndex(); ev->event.data.vsp_cmd.result_code = 0xFF; ev->event.data.vsp_cmd.reserved = 0; ev->event.data.vsp_cmd.sub_data.page[0] = iseries_hv_addr(pages[0]); ev->event.data.vsp_cmd.sub_data.page[1] = iseries_hv_addr(pages[1]); ev->event.data.vsp_cmd.sub_data.page[2] = iseries_hv_addr(pages[2]); ev->event.data.vsp_cmd.sub_data.page[3] = iseries_hv_addr(pages[3]); mb(); if (signal_event(ev) != 0) return; while (return_stuff.xDone != 1) udelay(10); if (return_stuff.xRc == 0) memcpy(buffer, pages[0], size); kfree(pages[0]); kfree(pages[1]); kfree(pages[2]); kfree(pages[3]); } #endif static int proc_mf_dump_src(char *page, char **start, off_t off, int count, int *eof, void *data) { #if 0 int len; mf_getSrcHistory(page, count); len = count; len -= off; if (len < count) { *eof = 1; if (len <= 0) return 0; } else len = count; *start = page + off; return len; #else return 0; #endif } static int proc_mf_change_src(struct file *file, const char __user *buffer, unsigned long count, void *data) { char stkbuf[10]; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if ((count < 4) && (count != 1)) { printk(KERN_ERR "mf_proc: invalid src\n"); return -EINVAL; } if (count > (sizeof(stkbuf) - 1)) count = sizeof(stkbuf) - 1; if (copy_from_user(stkbuf, buffer, count)) return -EFAULT; if ((count == 1) && (*stkbuf == '\0')) mf_clear_src(); else mf_display_src(*(u32 *)stkbuf); return count; } static int proc_mf_change_cmdline(struct file *file, const char __user *buffer, unsigned long count, void *data) { struct vsp_cmd_data vsp_cmd; dma_addr_t dma_addr; char *page; int ret = -EACCES; if (!capable(CAP_SYS_ADMIN)) goto out; dma_addr = 0; page = dma_alloc_coherent(iSeries_vio_dev, count, &dma_addr, GFP_ATOMIC); ret = -ENOMEM; if (page == NULL) goto out; ret = -EFAULT; if (copy_from_user(page, buffer, count)) goto out_free; memset(&vsp_cmd, 0, sizeof(vsp_cmd)); vsp_cmd.cmd = 31; vsp_cmd.sub_data.kern.token = dma_addr; vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex; vsp_cmd.sub_data.kern.side = (u64)data; vsp_cmd.sub_data.kern.length = count; mb(); (void)signal_vsp_instruction(&vsp_cmd); ret = count; out_free: dma_free_coherent(iSeries_vio_dev, count, page, dma_addr); out: return ret; } static ssize_t proc_mf_change_vmlinux(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode); ssize_t rc; dma_addr_t dma_addr; char *page; struct vsp_cmd_data vsp_cmd; rc = -EACCES; if (!capable(CAP_SYS_ADMIN)) goto out; dma_addr = 0; page = dma_alloc_coherent(iSeries_vio_dev, count, &dma_addr, GFP_ATOMIC); rc = -ENOMEM; if (page == NULL) { printk(KERN_ERR "mf.c: couldn't allocate memory to set vmlinux chunk\n"); goto out; } rc = -EFAULT; if (copy_from_user(page, buf, count)) goto out_free; memset(&vsp_cmd, 0, sizeof(vsp_cmd)); vsp_cmd.cmd = 30; vsp_cmd.sub_data.kern.token = dma_addr; vsp_cmd.sub_data.kern.address_type = HvLpDma_AddressType_TceIndex; vsp_cmd.sub_data.kern.side = (u64)dp->data; vsp_cmd.sub_data.kern.offset = *ppos; vsp_cmd.sub_data.kern.length = count; mb(); rc = signal_vsp_instruction(&vsp_cmd); if (rc) goto out_free; rc = -ENOMEM; if (vsp_cmd.result_code != 0) goto out_free; *ppos += count; rc = count; out_free: dma_free_coherent(iSeries_vio_dev, count, page, dma_addr); out: return rc; } static struct file_operations proc_vmlinux_operations = { .write = proc_mf_change_vmlinux, }; static int __init mf_proc_init(void) { struct proc_dir_entry *mf_proc_root; struct proc_dir_entry *ent; struct proc_dir_entry *mf; char name[2]; int i; mf_proc_root = proc_mkdir("iSeries/mf", NULL); if (!mf_proc_root) return 1; name[1] = '\0'; for (i = 0; i < 4; i++) { name[0] = 'A' + i; mf = proc_mkdir(name, mf_proc_root); if (!mf) return 1; ent = create_proc_entry("cmdline", S_IFREG|S_IRUSR|S_IWUSR, mf); if (!ent) return 1; ent->nlink = 1; ent->data = (void *)(long)i; ent->read_proc = proc_mf_dump_cmdline; ent->write_proc = proc_mf_change_cmdline; if (i == 3) /* no vmlinux entry for 'D' */ continue; ent = create_proc_entry("vmlinux", S_IFREG|S_IWUSR, mf); if (!ent) return 1; ent->nlink = 1; ent->data = (void *)(long)i; ent->proc_fops = &proc_vmlinux_operations; } ent = create_proc_entry("side", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root); if (!ent) return 1; ent->nlink = 1; ent->data = (void *)0; ent->read_proc = proc_mf_dump_side; ent->write_proc = proc_mf_change_side; ent = create_proc_entry("src", S_IFREG|S_IRUSR|S_IWUSR, mf_proc_root); if (!ent) return 1; ent->nlink = 1; ent->data = (void *)0; ent->read_proc = proc_mf_dump_src; ent->write_proc = proc_mf_change_src; return 0; } __initcall(mf_proc_init); #endif /* CONFIG_PROC_FS */ /* * Get the RTC from the virtual service processor * This requires flowing LpEvents to the primary partition */ void iSeries_get_rtc_time(struct rtc_time *rtc_tm) { if (piranha_simulator) return; mf_get_rtc(rtc_tm); rtc_tm->tm_mon--; } /* * Set the RTC in the virtual service processor * This requires flowing LpEvents to the primary partition */ int iSeries_set_rtc_time(struct rtc_time *tm) { mf_set_rtc(tm); return 0; } unsigned long iSeries_get_boot_time(void) { struct rtc_time tm; if (piranha_simulator) return 0; mf_get_boot_rtc(&tm); return mktime(tm.tm_year + 1900, tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); }