| /* |
| ** ----------------------------------------------------------------------------- |
| ** |
| ** Perle Specialix driver for Linux |
| ** ported from the existing SCO driver source |
| ** |
| * |
| * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK. |
| * |
| * 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., 675 Mass Ave, Cambridge, MA 02139, USA. |
| ** |
| ** Module : riocmd.c |
| ** SID : 1.2 |
| ** Last Modified : 11/6/98 10:33:41 |
| ** Retrieved : 11/6/98 10:33:49 |
| ** |
| ** ident @(#)riocmd.c 1.2 |
| ** |
| ** ----------------------------------------------------------------------------- |
| */ |
| #ifdef SCCS_LABELS |
| static char *_riocmd_c_sccs_ = "@(#)riocmd.c 1.2"; |
| #endif |
| |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/tty.h> |
| #include <asm/io.h> |
| #include <asm/system.h> |
| #include <asm/string.h> |
| #include <asm/semaphore.h> |
| |
| #include <linux/termios.h> |
| #include <linux/serial.h> |
| |
| #include <linux/generic_serial.h> |
| |
| #include "linux_compat.h" |
| #include "rio_linux.h" |
| #include "typdef.h" |
| #include "pkt.h" |
| #include "daemon.h" |
| #include "rio.h" |
| #include "riospace.h" |
| #include "top.h" |
| #include "cmdpkt.h" |
| #include "map.h" |
| #include "riotypes.h" |
| #include "rup.h" |
| #include "port.h" |
| #include "riodrvr.h" |
| #include "rioinfo.h" |
| #include "func.h" |
| #include "errors.h" |
| #include "pci.h" |
| |
| #include "parmmap.h" |
| #include "unixrup.h" |
| #include "board.h" |
| #include "host.h" |
| #include "error.h" |
| #include "phb.h" |
| #include "link.h" |
| #include "cmdblk.h" |
| #include "route.h" |
| #include "control.h" |
| #include "cirrus.h" |
| |
| |
| static struct IdentifyRta IdRta; |
| static struct KillNeighbour KillUnit; |
| |
| int RIOFoadRta(struct Host *HostP, struct Map *MapP) |
| { |
| struct CmdBlk *CmdBlkP; |
| |
| rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA\n"); |
| |
| CmdBlkP = RIOGetCmdBlk(); |
| |
| if (!CmdBlkP) { |
| rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n"); |
| return -ENXIO; |
| } |
| |
| CmdBlkP->Packet.dest_unit = MapP->ID; |
| CmdBlkP->Packet.dest_port = BOOT_RUP; |
| CmdBlkP->Packet.src_unit = 0; |
| CmdBlkP->Packet.src_port = BOOT_RUP; |
| CmdBlkP->Packet.len = 0x84; |
| CmdBlkP->Packet.data[0] = IFOAD; |
| CmdBlkP->Packet.data[1] = 0; |
| CmdBlkP->Packet.data[2] = IFOAD_MAGIC & 0xFF; |
| CmdBlkP->Packet.data[3] = (IFOAD_MAGIC >> 8) & 0xFF; |
| |
| if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) { |
| rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n"); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| int RIOZombieRta(struct Host *HostP, struct Map *MapP) |
| { |
| struct CmdBlk *CmdBlkP; |
| |
| rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA\n"); |
| |
| CmdBlkP = RIOGetCmdBlk(); |
| |
| if (!CmdBlkP) { |
| rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n"); |
| return -ENXIO; |
| } |
| |
| CmdBlkP->Packet.dest_unit = MapP->ID; |
| CmdBlkP->Packet.dest_port = BOOT_RUP; |
| CmdBlkP->Packet.src_unit = 0; |
| CmdBlkP->Packet.src_port = BOOT_RUP; |
| CmdBlkP->Packet.len = 0x84; |
| CmdBlkP->Packet.data[0] = ZOMBIE; |
| CmdBlkP->Packet.data[1] = 0; |
| CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF; |
| CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF; |
| |
| if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) { |
| rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n"); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| int RIOCommandRta(struct rio_info *p, uint RtaUnique, int (*func) (struct Host * HostP, struct Map * MapP)) |
| { |
| uint Host; |
| |
| rio_dprintk(RIO_DEBUG_CMD, "Command RTA 0x%x func 0x%x\n", RtaUnique, (int) func); |
| |
| if (!RtaUnique) |
| return (0); |
| |
| for (Host = 0; Host < p->RIONumHosts; Host++) { |
| uint Rta; |
| struct Host *HostP = &p->RIOHosts[Host]; |
| |
| for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) { |
| struct Map *MapP = &HostP->Mapping[Rta]; |
| |
| if (MapP->RtaUniqueNum == RtaUnique) { |
| uint Link; |
| |
| /* |
| ** now, lets just check we have a route to it... |
| ** IF the routing stuff is working, then one of the |
| ** topology entries for this unit will have a legit |
| ** route *somewhere*. We care not where - if its got |
| ** any connections, we can get to it. |
| */ |
| for (Link = 0; Link < LINKS_PER_UNIT; Link++) { |
| if (MapP->Topology[Link].Unit <= (uchar) MAX_RUP) { |
| /* |
| ** Its worth trying the operation... |
| */ |
| return (*func) (HostP, MapP); |
| } |
| } |
| } |
| } |
| } |
| return -ENXIO; |
| } |
| |
| |
| int RIOIdentifyRta(struct rio_info *p, caddr_t arg) |
| { |
| uint Host; |
| |
| if (copyin((int) arg, (caddr_t) & IdRta, sizeof(IdRta)) == COPYFAIL) { |
| rio_dprintk(RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n"); |
| p->RIOError.Error = COPYIN_FAILED; |
| return -EFAULT; |
| } |
| |
| for (Host = 0; Host < p->RIONumHosts; Host++) { |
| uint Rta; |
| struct Host *HostP = &p->RIOHosts[Host]; |
| |
| for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) { |
| struct Map *MapP = &HostP->Mapping[Rta]; |
| |
| if (MapP->RtaUniqueNum == IdRta.RtaUnique) { |
| uint Link; |
| /* |
| ** now, lets just check we have a route to it... |
| ** IF the routing stuff is working, then one of the |
| ** topology entries for this unit will have a legit |
| ** route *somewhere*. We care not where - if its got |
| ** any connections, we can get to it. |
| */ |
| for (Link = 0; Link < LINKS_PER_UNIT; Link++) { |
| if (MapP->Topology[Link].Unit <= (uchar) MAX_RUP) { |
| /* |
| ** Its worth trying the operation... |
| */ |
| struct CmdBlk *CmdBlkP; |
| |
| rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA\n"); |
| |
| CmdBlkP = RIOGetCmdBlk(); |
| |
| if (!CmdBlkP) { |
| rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n"); |
| return -ENXIO; |
| } |
| |
| CmdBlkP->Packet.dest_unit = MapP->ID; |
| CmdBlkP->Packet.dest_port = BOOT_RUP; |
| CmdBlkP->Packet.src_unit = 0; |
| CmdBlkP->Packet.src_port = BOOT_RUP; |
| CmdBlkP->Packet.len = 0x84; |
| CmdBlkP->Packet.data[0] = IDENTIFY; |
| CmdBlkP->Packet.data[1] = 0; |
| CmdBlkP->Packet.data[2] = IdRta.ID; |
| |
| if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) { |
| rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n"); |
| return -EIO; |
| } |
| return 0; |
| } |
| } |
| } |
| } |
| } |
| return -ENOENT; |
| } |
| |
| |
| int RIOKillNeighbour(struct rio_info *p, caddr_t arg) |
| { |
| uint Host; |
| uint ID; |
| struct Host *HostP; |
| struct CmdBlk *CmdBlkP; |
| |
| rio_dprintk(RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n"); |
| |
| if (copyin((int) arg, (caddr_t) & KillUnit, sizeof(KillUnit)) == COPYFAIL) { |
| rio_dprintk(RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n"); |
| p->RIOError.Error = COPYIN_FAILED; |
| return -EFAULT; |
| } |
| |
| if (KillUnit.Link > 3) |
| return -ENXIO; |
| |
| CmdBlkP = RIOGetCmdBlk(); |
| |
| if (!CmdBlkP) { |
| rio_dprintk(RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n"); |
| return -ENXIO; |
| } |
| |
| CmdBlkP->Packet.dest_unit = 0; |
| CmdBlkP->Packet.src_unit = 0; |
| CmdBlkP->Packet.dest_port = BOOT_RUP; |
| CmdBlkP->Packet.src_port = BOOT_RUP; |
| CmdBlkP->Packet.len = 0x84; |
| CmdBlkP->Packet.data[0] = UFOAD; |
| CmdBlkP->Packet.data[1] = KillUnit.Link; |
| CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF; |
| CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF; |
| |
| for (Host = 0; Host < p->RIONumHosts; Host++) { |
| ID = 0; |
| HostP = &p->RIOHosts[Host]; |
| |
| if (HostP->UniqueNum == KillUnit.UniqueNum) { |
| if (RIOQueueCmdBlk(HostP, RTAS_PER_HOST + KillUnit.Link, CmdBlkP) == RIO_FAIL) { |
| rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n"); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| for (ID = 0; ID < RTAS_PER_HOST; ID++) { |
| if (HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum) { |
| CmdBlkP->Packet.dest_unit = ID + 1; |
| if (RIOQueueCmdBlk(HostP, ID, CmdBlkP) == RIO_FAIL) { |
| rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n"); |
| return -EIO; |
| } |
| return 0; |
| } |
| } |
| } |
| RIOFreeCmdBlk(CmdBlkP); |
| return -ENXIO; |
| } |
| |
| int RIOSuspendBootRta(struct Host *HostP, int ID, int Link) |
| { |
| struct CmdBlk *CmdBlkP; |
| |
| rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link); |
| |
| CmdBlkP = RIOGetCmdBlk(); |
| |
| if (!CmdBlkP) { |
| rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n"); |
| return -ENXIO; |
| } |
| |
| CmdBlkP->Packet.dest_unit = ID; |
| CmdBlkP->Packet.dest_port = BOOT_RUP; |
| CmdBlkP->Packet.src_unit = 0; |
| CmdBlkP->Packet.src_port = BOOT_RUP; |
| CmdBlkP->Packet.len = 0x84; |
| CmdBlkP->Packet.data[0] = IWAIT; |
| CmdBlkP->Packet.data[1] = Link; |
| CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF; |
| CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF; |
| |
| if (RIOQueueCmdBlk(HostP, ID - 1, CmdBlkP) == RIO_FAIL) { |
| rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n"); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| int RIOFoadWakeup(struct rio_info *p) |
| { |
| int port; |
| register struct Port *PortP; |
| unsigned long flags; |
| |
| for (port = 0; port < RIO_PORTS; port++) { |
| PortP = p->RIOPortp[port]; |
| |
| rio_spin_lock_irqsave(&PortP->portSem, flags); |
| PortP->Config = 0; |
| PortP->State = 0; |
| PortP->InUse = NOT_INUSE; |
| PortP->PortState = 0; |
| PortP->FlushCmdBodge = 0; |
| PortP->ModemLines = 0; |
| PortP->ModemState = 0; |
| PortP->CookMode = 0; |
| PortP->ParamSem = 0; |
| PortP->Mapped = 0; |
| PortP->WflushFlag = 0; |
| PortP->MagicFlags = 0; |
| PortP->RxDataStart = 0; |
| PortP->TxBufferIn = 0; |
| PortP->TxBufferOut = 0; |
| rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| } |
| return (0); |
| } |
| |
| /* |
| ** Incoming command on the COMMAND_RUP to be processed. |
| */ |
| static int RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, PKT * PacketP) |
| { |
| struct PktCmd *PktCmdP = (struct PktCmd *) PacketP->data; |
| struct Port *PortP; |
| struct UnixRup *UnixRupP; |
| ushort SysPort; |
| ushort ReportedModemStatus; |
| ushort rup; |
| ushort subCommand; |
| unsigned long flags; |
| |
| func_enter(); |
| |
| #ifdef CHECK |
| CheckHost(Host); |
| CheckHostP(HostP); |
| CheckPacketP(PacketP); |
| #endif |
| |
| /* |
| ** 16 port RTA note: |
| ** Command rup packets coming from the RTA will have pkt->data[1] (which |
| ** translates to PktCmdP->PhbNum) set to the host port number for the |
| ** particular unit. To access the correct BaseSysPort for a 16 port RTA, |
| ** we can use PhbNum to get the rup number for the appropriate 8 port |
| ** block (for the first block, this should be equal to 'Rup'). |
| */ |
| rup = RBYTE(PktCmdP->PhbNum) / (ushort) PORTS_PER_RTA; |
| UnixRupP = &HostP->UnixRups[rup]; |
| SysPort = UnixRupP->BaseSysPort + (RBYTE(PktCmdP->PhbNum) % (ushort) PORTS_PER_RTA); |
| rio_dprintk(RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort); |
| |
| #ifdef CHECK |
| CheckRup(rup); |
| CheckUnixRupP(UnixRupP); |
| #endif |
| if (UnixRupP->BaseSysPort == NO_PORT) { |
| rio_dprintk(RIO_DEBUG_CMD, "OBSCURE ERROR!\n"); |
| rio_dprintk(RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n"); |
| rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Host number %d, name ``%s''\n", HostP - p->RIOHosts, HostP->Name); |
| rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Rup number 0x%x\n", rup); |
| |
| if (Rup >= (ushort) MAX_RUP) { |
| rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n", HostP->Mapping[Rup].Name); |
| } else |
| rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", ('A' + Rup - MAX_RUP), HostP->Name); |
| |
| rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n", PacketP->dest_unit, PacketP->dest_port); |
| rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Source 0x%x:0x%x\n", PacketP->src_unit, PacketP->src_port); |
| rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Length 0x%x (%d)\n", PacketP->len, PacketP->len); |
| rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Control 0x%x (%d)\n", PacketP->control, PacketP->control); |
| rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Check 0x%x (%d)\n", PacketP->csum, PacketP->csum); |
| rio_dprintk(RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " "Command Code 0x%x\n", PktCmdP->PhbNum, PktCmdP->Command); |
| return TRUE; |
| } |
| #ifdef CHECK |
| CheckSysPort(SysPort); |
| #endif |
| PortP = p->RIOPortp[SysPort]; |
| rio_spin_lock_irqsave(&PortP->portSem, flags); |
| switch (RBYTE(PktCmdP->Command)) { |
| case BREAK_RECEIVED: |
| rio_dprintk(RIO_DEBUG_CMD, "Received a break!\n"); |
| /* If the current line disc. is not multi-threading and |
| the current processor is not the default, reset rup_intr |
| and return FALSE to ensure that the command packet is |
| not freed. */ |
| /* Call tmgr HANGUP HERE */ |
| /* Fix this later when every thing works !!!! RAMRAJ */ |
| gs_got_break(&PortP->gs); |
| break; |
| |
| case COMPLETE: |
| rio_dprintk(RIO_DEBUG_CMD, "Command complete on phb %d host %d\n", RBYTE(PktCmdP->PhbNum), HostP - p->RIOHosts); |
| subCommand = 1; |
| switch (RBYTE(PktCmdP->SubCommand)) { |
| case MEMDUMP: |
| rio_dprintk(RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", RBYTE(PktCmdP->SubCommand), RWORD(PktCmdP->SubAddr)); |
| break; |
| case READ_REGISTER: |
| rio_dprintk(RIO_DEBUG_CMD, "Read register (0x%x)\n", RWORD(PktCmdP->SubAddr)); |
| p->CdRegister = (RBYTE(PktCmdP->ModemStatus) & MSVR1_HOST); |
| break; |
| default: |
| subCommand = 0; |
| break; |
| } |
| if (subCommand) |
| break; |
| rio_dprintk(RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", RBYTE(PktCmdP->PortStatus), PortP->PortState); |
| if (PortP->PortState != RBYTE(PktCmdP->PortStatus)) { |
| rio_dprintk(RIO_DEBUG_CMD, "Mark status & wakeup\n"); |
| PortP->PortState = RBYTE(PktCmdP->PortStatus); |
| /* What should we do here ... |
| wakeup( &PortP->PortState ); |
| */ |
| } else |
| rio_dprintk(RIO_DEBUG_CMD, "No change\n"); |
| |
| /* FALLTHROUGH */ |
| case MODEM_STATUS: |
| /* |
| ** Knock out the tbusy and tstop bits, as these are not relevant |
| ** to the check for modem status change (they're just there because |
| ** it's a convenient place to put them!). |
| */ |
| ReportedModemStatus = RBYTE(PktCmdP->ModemStatus); |
| if ((PortP->ModemState & MSVR1_HOST) == (ReportedModemStatus & MSVR1_HOST)) { |
| rio_dprintk(RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState); |
| /* |
| ** Update ModemState just in case tbusy or tstop states have |
| ** changed. |
| */ |
| PortP->ModemState = ReportedModemStatus; |
| } else { |
| rio_dprintk(RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n", PortP->ModemState, ReportedModemStatus); |
| PortP->ModemState = ReportedModemStatus; |
| #ifdef MODEM_SUPPORT |
| if (PortP->Mapped) { |
| /***********************************************************\ |
| ************************************************************* |
| *** *** |
| *** M O D E M S T A T E C H A N G E *** |
| *** *** |
| ************************************************************* |
| \***********************************************************/ |
| /* |
| ** If the device is a modem, then check the modem |
| ** carrier. |
| */ |
| if (PortP->gs.tty == NULL) |
| break; |
| if (PortP->gs.tty->termios == NULL) |
| break; |
| |
| if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) && ((PortP->State & (RIO_MOPEN | RIO_WOPEN)))) { |
| |
| rio_dprintk(RIO_DEBUG_CMD, "Is there a Carrier?\n"); |
| /* |
| ** Is there a carrier? |
| */ |
| if (PortP->ModemState & MSVR1_CD) { |
| /* |
| ** Has carrier just appeared? |
| */ |
| if (!(PortP->State & RIO_CARR_ON)) { |
| rio_dprintk(RIO_DEBUG_CMD, "Carrier just came up.\n"); |
| PortP->State |= RIO_CARR_ON; |
| /* |
| ** wakeup anyone in WOPEN |
| */ |
| if (PortP->State & (PORT_ISOPEN | RIO_WOPEN)) |
| wake_up_interruptible(&PortP->gs.open_wait); |
| #ifdef STATS |
| PortP->Stat.ModemOnCnt++; |
| #endif |
| } |
| } else { |
| /* |
| ** Has carrier just dropped? |
| */ |
| if (PortP->State & RIO_CARR_ON) { |
| if (PortP->State & (PORT_ISOPEN | RIO_WOPEN | RIO_MOPEN)) |
| tty_hangup(PortP->gs.tty); |
| PortP->State &= ~RIO_CARR_ON; |
| rio_dprintk(RIO_DEBUG_CMD, "Carrirer just went down\n"); |
| #ifdef STATS |
| PortP->Stat.ModemOffCnt++; |
| #endif |
| } |
| } |
| } |
| } |
| #endif |
| } |
| break; |
| |
| default: |
| rio_dprintk(RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %d\n", RBYTE(PktCmdP->Command), HostP - p->RIOHosts); |
| break; |
| } |
| rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| |
| func_exit(); |
| |
| return TRUE; |
| } |
| |
| /* |
| ** The command mechanism: |
| ** Each rup has a chain of commands associated with it. |
| ** This chain is maintained by routines in this file. |
| ** Periodically we are called and we run a quick check of all the |
| ** active chains to determine if there is a command to be executed, |
| ** and if the rup is ready to accept it. |
| ** |
| */ |
| |
| /* |
| ** Allocate an empty command block. |
| */ |
| struct CmdBlk *RIOGetCmdBlk(void) |
| { |
| struct CmdBlk *CmdBlkP; |
| |
| CmdBlkP = (struct CmdBlk *) sysbrk(sizeof(struct CmdBlk)); |
| if (CmdBlkP) |
| bzero(CmdBlkP, sizeof(struct CmdBlk)); |
| |
| return CmdBlkP; |
| } |
| |
| /* |
| ** Return a block to the head of the free list. |
| */ |
| void RIOFreeCmdBlk(struct CmdBlk *CmdBlkP) |
| { |
| sysfree((void *) CmdBlkP, sizeof(struct CmdBlk)); |
| } |
| |
| /* |
| ** attach a command block to the list of commands to be performed for |
| ** a given rup. |
| */ |
| int RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP) |
| { |
| struct CmdBlk **Base; |
| struct UnixRup *UnixRupP; |
| unsigned long flags; |
| |
| #ifdef CHECK |
| CheckHostP(HostP); |
| CheckRup(Rup); |
| CheckCmdBlkP(CmdBlkP); |
| #endif |
| if (Rup >= (ushort) (MAX_RUP + LINKS_PER_UNIT)) { |
| rio_dprintk(RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n", Rup); |
| RIOFreeCmdBlk(CmdBlkP); |
| return RIO_FAIL; |
| } |
| |
| UnixRupP = &HostP->UnixRups[Rup]; |
| |
| rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| |
| /* |
| ** If the RUP is currently inactive, then put the request |
| ** straight on the RUP.... |
| */ |
| if ((UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) && (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) |
| : TRUE)) { |
| rio_dprintk(RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n", CmdBlkP->Packet.data[0]); |
| |
| /* |
| ** Whammy! blat that pack! |
| */ |
| HostP->Copy((caddr_t) & CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT)); |
| |
| /* |
| ** place command packet on the pending position. |
| */ |
| UnixRupP->CmdPendingP = CmdBlkP; |
| |
| /* |
| ** set the command register |
| */ |
| WWORD(UnixRupP->RupP->txcontrol, TX_PACKET_READY); |
| |
| rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| |
| return RIO_SUCCESS; |
| } |
| rio_dprintk(RIO_DEBUG_CMD, "RUP active - en-queing\n"); |
| |
| if (UnixRupP->CmdsWaitingP != NULL) |
| rio_dprintk(RIO_DEBUG_CMD, "Rup active - command waiting\n"); |
| if (UnixRupP->CmdPendingP != NULL) |
| rio_dprintk(RIO_DEBUG_CMD, "Rup active - command pending\n"); |
| if (RWORD(UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE) |
| rio_dprintk(RIO_DEBUG_CMD, "Rup active - command rup not ready\n"); |
| |
| Base = &UnixRupP->CmdsWaitingP; |
| |
| rio_dprintk(RIO_DEBUG_CMD, "First try to queue cmdblk 0x%x at 0x%x\n", (int) CmdBlkP, (int) Base); |
| |
| while (*Base) { |
| rio_dprintk(RIO_DEBUG_CMD, "Command cmdblk 0x%x here\n", (int) (*Base)); |
| Base = &((*Base)->NextP); |
| rio_dprintk(RIO_DEBUG_CMD, "Now try to queue cmd cmdblk 0x%x at 0x%x\n", (int) CmdBlkP, (int) Base); |
| } |
| |
| rio_dprintk(RIO_DEBUG_CMD, "Will queue cmdblk 0x%x at 0x%x\n", (int) CmdBlkP, (int) Base); |
| |
| *Base = CmdBlkP; |
| |
| CmdBlkP->NextP = NULL; |
| |
| rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| |
| return RIO_SUCCESS; |
| } |
| |
| /* |
| ** Here we go - if there is an empty rup, fill it! |
| ** must be called at splrio() or higher. |
| */ |
| void RIOPollHostCommands(struct rio_info *p, struct Host *HostP) |
| { |
| register struct CmdBlk *CmdBlkP; |
| register struct UnixRup *UnixRupP; |
| struct PKT *PacketP; |
| ushort Rup; |
| unsigned long flags; |
| |
| |
| Rup = MAX_RUP + LINKS_PER_UNIT; |
| |
| do { /* do this loop for each RUP */ |
| /* |
| ** locate the rup we are processing & lock it |
| */ |
| UnixRupP = &HostP->UnixRups[--Rup]; |
| |
| spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| |
| /* |
| ** First check for incoming commands: |
| */ |
| if (RWORD(UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE) { |
| int FreeMe; |
| |
| PacketP = (PKT *) RIO_PTR(HostP->Caddr, RWORD(UnixRupP->RupP->rxpkt)); |
| |
| ShowPacket(DBG_CMD, PacketP); |
| |
| switch (RBYTE(PacketP->dest_port)) { |
| case BOOT_RUP: |
| rio_dprintk(RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", RBYTE(PacketP->len) & 0x80 ? "Command" : "Data", RBYTE(PacketP->data[0])); |
| rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| FreeMe = RIOBootRup(p, Rup, HostP, PacketP); |
| rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| break; |
| |
| case COMMAND_RUP: |
| /* |
| ** Free the RUP lock as loss of carrier causes a |
| ** ttyflush which will (eventually) call another |
| ** routine that uses the RUP lock. |
| */ |
| rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| FreeMe = RIOCommandRup(p, Rup, HostP, PacketP); |
| if (PacketP->data[5] == MEMDUMP) { |
| rio_dprintk(RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", *(ushort *) & (PacketP->data[6])); |
| HostP->Copy((caddr_t) & (PacketP->data[8]), (caddr_t) p->RIOMemDump, 32); |
| } |
| rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| break; |
| |
| case ROUTE_RUP: |
| rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| FreeMe = RIORouteRup(p, Rup, HostP, PacketP); |
| rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| break; |
| |
| default: |
| rio_dprintk(RIO_DEBUG_CMD, "Unknown RUP %d\n", RBYTE(PacketP->dest_port)); |
| FreeMe = 1; |
| break; |
| } |
| |
| if (FreeMe) { |
| rio_dprintk(RIO_DEBUG_CMD, "Free processed incoming command packet\n"); |
| put_free_end(HostP, PacketP); |
| |
| WWORD(UnixRupP->RupP->rxcontrol, RX_RUP_INACTIVE); |
| |
| if (RWORD(UnixRupP->RupP->handshake) == PHB_HANDSHAKE_SET) { |
| rio_dprintk(RIO_DEBUG_CMD, "Handshake rup %d\n", Rup); |
| WWORD(UnixRupP->RupP->handshake, PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET); |
| } |
| } |
| } |
| |
| /* |
| ** IF a command was running on the port, |
| ** and it has completed, then tidy it up. |
| */ |
| if ((CmdBlkP = UnixRupP->CmdPendingP) && /* ASSIGN! */ |
| (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) { |
| /* |
| ** we are idle. |
| ** there is a command in pending. |
| ** Therefore, this command has finished. |
| ** So, wakeup whoever is waiting for it (and tell them |
| ** what happened). |
| */ |
| if (CmdBlkP->Packet.dest_port == BOOT_RUP) |
| rio_dprintk(RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n", CmdBlkP->Packet.len & 0x80 ? "Command" : "Data", CmdBlkP->Packet.data[0]); |
| |
| rio_dprintk(RIO_DEBUG_CMD, "Command 0x%x completed\n", (int) CmdBlkP); |
| |
| /* |
| ** Clear the Rup lock to prevent mutual exclusion. |
| */ |
| if (CmdBlkP->PostFuncP) { |
| rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg, CmdBlkP); |
| rio_spin_lock_irqsave(&UnixRupP->RupLock, flags); |
| } |
| |
| /* |
| ** ....clear the pending flag.... |
| */ |
| UnixRupP->CmdPendingP = NULL; |
| |
| /* |
| ** ....and return the command block to the freelist. |
| */ |
| RIOFreeCmdBlk(CmdBlkP); |
| } |
| |
| /* |
| ** If there is a command for this rup, and the rup |
| ** is idle, then process the command |
| */ |
| if ((CmdBlkP = UnixRupP->CmdsWaitingP) && /* ASSIGN! */ |
| (UnixRupP->CmdPendingP == NULL) && (RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) { |
| /* |
| ** if the pre-function is non-zero, call it. |
| ** If it returns RIO_FAIL then don't |
| ** send this command yet! |
| */ |
| #ifdef CHECK |
| CheckCmdBlkP(CmdBlkP); |
| #endif |
| if (!(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) : TRUE)) { |
| rio_dprintk(RIO_DEBUG_CMD, "Not ready to start command 0x%x\n", (int) CmdBlkP); |
| } else { |
| rio_dprintk(RIO_DEBUG_CMD, "Start new command 0x%x Cmd byte is 0x%x\n", (int) CmdBlkP, CmdBlkP->Packet.data[0]); |
| /* |
| ** Whammy! blat that pack! |
| */ |
| #ifdef CHECK |
| CheckPacketP((PKT *) RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt)); |
| #endif |
| HostP->Copy((caddr_t) & CmdBlkP->Packet, RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT)); |
| |
| /* |
| ** remove the command from the rup command queue... |
| */ |
| UnixRupP->CmdsWaitingP = CmdBlkP->NextP; |
| |
| /* |
| ** ...and place it on the pending position. |
| */ |
| UnixRupP->CmdPendingP = CmdBlkP; |
| |
| /* |
| ** set the command register |
| */ |
| WWORD(UnixRupP->RupP->txcontrol, TX_PACKET_READY); |
| |
| /* |
| ** the command block will be freed |
| ** when the command has been processed. |
| */ |
| } |
| } |
| spin_unlock_irqrestore(&UnixRupP->RupLock, flags); |
| } while (Rup); |
| } |
| |
| int RIOWFlushMark(int iPortP, struct CmdBlk *CmdBlkP) |
| { |
| struct Port *PortP = (struct Port *) iPortP; |
| unsigned long flags; |
| |
| rio_spin_lock_irqsave(&PortP->portSem, flags); |
| #ifdef CHECK |
| CheckPortP(PortP); |
| #endif |
| PortP->WflushFlag++; |
| PortP->MagicFlags |= MAGIC_FLUSH; |
| rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| return RIOUnUse(iPortP, CmdBlkP); |
| } |
| |
| int RIORFlushEnable(int iPortP, struct CmdBlk *CmdBlkP) |
| { |
| struct Port *PortP = (struct Port *) iPortP; |
| PKT *PacketP; |
| unsigned long flags; |
| |
| rio_spin_lock_irqsave(&PortP->portSem, flags); |
| |
| while (can_remove_receive(&PacketP, PortP)) { |
| remove_receive(PortP); |
| ShowPacket(DBG_PROC, PacketP); |
| put_free_end(PortP->HostP, PacketP); |
| } |
| |
| if (RWORD(PortP->PhbP->handshake) == PHB_HANDSHAKE_SET) { |
| /* |
| ** MAGIC! (Basically, handshake the RX buffer, so that |
| ** the RTAs upstream can be re-enabled.) |
| */ |
| rio_dprintk(RIO_DEBUG_CMD, "Util: Set RX handshake bit\n"); |
| WWORD(PortP->PhbP->handshake, PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET); |
| } |
| rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| return RIOUnUse(iPortP, CmdBlkP); |
| } |
| |
| int RIOUnUse(int iPortP, struct CmdBlk *CmdBlkP) |
| { |
| struct Port *PortP = (struct Port *) iPortP; |
| unsigned long flags; |
| |
| rio_spin_lock_irqsave(&PortP->portSem, flags); |
| |
| #ifdef CHECK |
| CheckPortP(PortP); |
| #endif |
| rio_dprintk(RIO_DEBUG_CMD, "Decrement in use count for port\n"); |
| |
| if (PortP->InUse) { |
| if (--PortP->InUse != NOT_INUSE) { |
| rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| return 0; |
| } |
| } |
| /* |
| ** While PortP->InUse is set (i.e. a preemptive command has been sent to |
| ** the RTA and is awaiting completion), any transmit data is prevented from |
| ** being transferred from the write queue into the transmit packets |
| ** (add_transmit) and no furthur transmit interrupt will be sent for that |
| ** data. The next interrupt will occur up to 500ms later (RIOIntr is called |
| ** twice a second as a saftey measure). This was the case when kermit was |
| ** used to send data into a RIO port. After each packet was sent, TCFLSH |
| ** was called to flush the read queue preemptively. PortP->InUse was |
| ** incremented, thereby blocking the 6 byte acknowledgement packet |
| ** transmitted back. This acknowledgment hung around for 500ms before |
| ** being sent, thus reducing input performance substantially!. |
| ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data |
| ** hanging around in the transmit buffer is sent immediately. |
| */ |
| WWORD(PortP->HostP->ParmMapP->tx_intr, 1); |
| /* What to do here .. |
| wakeup( (caddr_t)&(PortP->InUse) ); |
| */ |
| rio_spin_unlock_irqrestore(&PortP->portSem, flags); |
| return 0; |
| } |
| |
| void ShowPacket(uint Flags, struct PKT *PacketP) |
| { |
| } |
| |
| /* |
| ** |
| ** How to use this file: |
| ** |
| ** To send a command down a rup, you need to allocate a command block, fill |
| ** in the packet information, fill in the command number, fill in the pre- |
| ** and post- functions and arguments, and then add the command block to the |
| ** queue of command blocks for the port in question. When the port is idle, |
| ** then the pre-function will be called. If this returns RIO_FAIL then the |
| ** command will be re-queued and tried again at a later date (probably in one |
| ** clock tick). If the pre-function returns NOT RIO_FAIL, then the command |
| ** packet will be queued on the RUP, and the txcontrol field set to the |
| ** command number. When the txcontrol field has changed from being the |
| ** command number, then the post-function will be called, with the argument |
| ** specified earlier, a pointer to the command block, and the value of |
| ** txcontrol. |
| ** |
| ** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer |
| ** to the command block structure allocated, or NULL if there aren't any. |
| ** The block will have been zeroed for you. |
| ** |
| ** The structure has the following fields: |
| ** |
| ** struct CmdBlk |
| ** { |
| ** struct CmdBlk *NextP; ** Pointer to next command block ** |
| ** struct PKT Packet; ** A packet, to copy to the rup ** |
| ** int (*PreFuncP)(); ** The func to call to check if OK ** |
| ** int PreArg; ** The arg for the func ** |
| ** int (*PostFuncP)(); ** The func to call when completed ** |
| ** int PostArg; ** The arg for the func ** |
| ** }; |
| ** |
| ** You need to fill in ALL fields EXCEPT NextP, which is used to link the |
| ** blocks together either on the free list or on the Rup list. |
| ** |
| ** Packet is an actual packet structure to be filled in with the packet |
| ** information associated with the command. You need to fill in everything, |
| ** as the command processore doesn't process the command packet in any way. |
| ** |
| ** The PreFuncP is called before the packet is enqueued on the host rup. |
| ** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must |
| ** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL |
| ** if the packet is NOT to be queued. |
| ** |
| ** The PostFuncP is called when the command has completed. It is called |
| ** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected |
| ** to return a value. PostFuncP does NOT need to free the command block, |
| ** as this happens automatically after PostFuncP returns. |
| ** |
| ** Once the command block has been filled in, it is attached to the correct |
| ** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is |
| ** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer |
| ** to it!), and CmdBlkP is the pointer to the command block allocated using |
| ** RIOGetCmdBlk(). |
| ** |
| */ |