diff options
Diffstat (limited to 'arch/ppc64/kernel/mf.c')
| -rw-r--r-- | arch/ppc64/kernel/mf.c | 1239 |
1 files changed, 1239 insertions, 0 deletions
diff --git a/arch/ppc64/kernel/mf.c b/arch/ppc64/kernel/mf.c new file mode 100644 index 0000000..1bd52ec --- /dev/null +++ b/arch/ppc64/kernel/mf.c @@ -0,0 +1,1239 @@ +/* + * mf.c + * Copyright (C) 2001 Troy D. Armstrong IBM Corporation + * Copyright (C) 2004 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 <asm/time.h> +#include <asm/uaccess.h> +#include <asm/iSeries/vio.h> +#include <asm/iSeries/mf.h> +#include <asm/iSeries/HvLpConfig.h> +#include <asm/iSeries/ItSpCommArea.h> + +/* + * 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); +} + +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); + tm->tm_wday = 0; + tm->tm_yday = 0; + tm->tm_isdst = 0; + if (rtc_data.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 rtc_data.rc; + } + + if ((rtc_data.ce_msg.ce_msg[2] == 0xa9) || + (rtc_data.ce_msg.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 *ce_msg = rtc_data.ce_msg.ce_msg; + 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_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 */ |
