diff options
Diffstat (limited to 'drivers/char/rio/riocmd.c')
| -rw-r--r-- | drivers/char/rio/riocmd.c | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/drivers/char/rio/riocmd.c b/drivers/char/rio/riocmd.c new file mode 100644 index 0000000..01f2654 --- /dev/null +++ b/drivers/char/rio/riocmd.c @@ -0,0 +1,938 @@ +/* +** ----------------------------------------------------------------------------- +** +** 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 +** +** ----------------------------------------------------------------------------- +*/ + +#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/uaccess.h> + +#include <linux/termios.h> +#include <linux/serial.h> + +#include <linux/generic_serial.h> + +#include "linux_compat.h" +#include "rio_linux.h" +#include "pkt.h" +#include "daemon.h" +#include "rio.h" +#include "riospace.h" +#include "cmdpkt.h" +#include "map.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 "phb.h" +#include "link.h" +#include "cmdblk.h" +#include "route.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, unsigned long RtaUnique, int (*func) (struct Host * HostP, struct Map * MapP)) +{ + unsigned int Host; + + rio_dprintk(RIO_DEBUG_CMD, "Command RTA 0x%lx func %p\n", RtaUnique, func); + + if (!RtaUnique) + return (0); + + for (Host = 0; Host < p->RIONumHosts; Host++) { + unsigned int 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 <= (u8) MAX_RUP) { + /* + ** Its worth trying the operation... + */ + return (*func) (HostP, MapP); + } + } + } + } + } + return -ENXIO; +} + + +int RIOIdentifyRta(struct rio_info *p, void __user * arg) +{ + unsigned int Host; + + if (copy_from_user(&IdRta, arg, sizeof(IdRta))) { + 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++) { + unsigned int 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 <= (u8) 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, void __user * arg) +{ + uint Host; + uint ID; + struct Host *HostP; + struct CmdBlk *CmdBlkP; + + rio_dprintk(RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n"); + + if (copy_from_user(&KillUnit, arg, sizeof(KillUnit))) { + 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; + 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, struct PKT __iomem *PacketP) +{ + struct PktCmd __iomem *PktCmdP = (struct PktCmd __iomem *)PacketP->data; + struct Port *PortP; + struct UnixRup *UnixRupP; + unsigned short SysPort; + unsigned short ReportedModemStatus; + unsigned short rup; + unsigned short subCommand; + unsigned long flags; + + func_enter(); + + /* + ** 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 = readb(&PktCmdP->PhbNum) / (unsigned short) PORTS_PER_RTA; + UnixRupP = &HostP->UnixRups[rup]; + SysPort = UnixRupP->BaseSysPort + (readb(&PktCmdP->PhbNum) % (unsigned short) PORTS_PER_RTA); + rio_dprintk(RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort); + + 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 %Zd, name ``%s''\n", HostP - p->RIOHosts, HostP->Name); + rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Rup number 0x%x\n", rup); + + if (Rup < (unsigned short) 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", readb(&PacketP->dest_unit), readb(&PacketP->dest_port)); + rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Source 0x%x:0x%x\n", readb(&PacketP->src_unit), readb(&PacketP->src_port)); + rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Length 0x%x (%d)\n", readb(&PacketP->len), readb(&PacketP->len)); + rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Control 0x%x (%d)\n", readb(&PacketP->control), readb(&PacketP->control)); + rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Check 0x%x (%d)\n", readw(&PacketP->csum), readw(&PacketP->csum)); + rio_dprintk(RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " "Command Code 0x%x\n", readb(&PktCmdP->PhbNum), readb(&PktCmdP->Command)); + return 1; + } + PortP = p->RIOPortp[SysPort]; + rio_spin_lock_irqsave(&PortP->portSem, flags); + switch (readb(&PktCmdP->Command)) { + case RIOC_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 0 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 RIOC_COMPLETE: + rio_dprintk(RIO_DEBUG_CMD, "Command complete on phb %d host %Zd\n", readb(&PktCmdP->PhbNum), HostP - p->RIOHosts); + subCommand = 1; + switch (readb(&PktCmdP->SubCommand)) { + case RIOC_MEMDUMP: + rio_dprintk(RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", readb(&PktCmdP->SubCommand), readw(&PktCmdP->SubAddr)); + break; + case RIOC_READ_REGISTER: + rio_dprintk(RIO_DEBUG_CMD, "Read register (0x%x)\n", readw(&PktCmdP->SubAddr)); + p->CdRegister = (readb(&PktCmdP->ModemStatus) & RIOC_MSVR1_HOST); + break; + default: + subCommand = 0; + break; + } + if (subCommand) + break; + rio_dprintk(RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", readb(&PktCmdP->PortStatus), PortP->PortState); + if (PortP->PortState != readb(&PktCmdP->PortStatus)) { + rio_dprintk(RIO_DEBUG_CMD, "Mark status & wakeup\n"); + PortP->PortState = readb(&PktCmdP->PortStatus); + /* What should we do here ... + wakeup( &PortP->PortState ); + */ + } else + rio_dprintk(RIO_DEBUG_CMD, "No change\n"); + + /* FALLTHROUGH */ + case RIOC_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 = readb(&PktCmdP->ModemStatus); + if ((PortP->ModemState & RIOC_MSVR1_HOST) == + (ReportedModemStatus & RIOC_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.port.tty == NULL) + break; + if (PortP->gs.port.tty->termios == NULL) + break; + + if (!(PortP->gs.port.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 & RIOC_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.port.open_wait); + } + } else { + /* + ** Has carrier just dropped? + */ + if (PortP->State & RIO_CARR_ON) { + if (PortP->State & (PORT_ISOPEN | RIO_WOPEN | RIO_MOPEN)) + tty_hangup(PortP->gs.port.tty); + PortP->State &= ~RIO_CARR_ON; + rio_dprintk(RIO_DEBUG_CMD, "Carrirer just went down\n"); + } + } + } + } +#endif + } + break; + + default: + rio_dprintk(RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %Zd\n", readb(&PktCmdP->Command), HostP - p->RIOHosts); + break; + } + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + + func_exit(); + + return 1; +} + +/* +** 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 = kzalloc(sizeof(struct CmdBlk), GFP_ATOMIC); + return CmdBlkP; +} + +/* +** Return a block to the head of the free list. +*/ +void RIOFreeCmdBlk(struct CmdBlk *CmdBlkP) +{ + kfree(CmdBlkP); +} + +/* +** 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; + + if (Rup >= (unsigned short) (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) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) && (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) + : 1)) { + 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(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct PKT)); + + /* + ** place command packet on the pending position. + */ + UnixRupP->CmdPendingP = CmdBlkP; + + /* + ** set the command register + */ + writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol); + + rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); + + return 0; + } + 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 (readw(&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 %p at %p\n", CmdBlkP, Base); + + while (*Base) { + rio_dprintk(RIO_DEBUG_CMD, "Command cmdblk %p here\n", *Base); + Base = &((*Base)->NextP); + rio_dprintk(RIO_DEBUG_CMD, "Now try to queue cmd cmdblk %p at %p\n", CmdBlkP, Base); + } + + rio_dprintk(RIO_DEBUG_CMD, "Will queue cmdblk %p at %p\n", CmdBlkP, Base); + + *Base = CmdBlkP; + + CmdBlkP->NextP = NULL; + + rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags); + + return 0; +} + +/* +** 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) +{ + struct CmdBlk *CmdBlkP; + struct UnixRup *UnixRupP; + struct PKT __iomem *PacketP; + unsigned short 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 (readw(&UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE) { + int FreeMe; + + PacketP = (struct PKT __iomem *) RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->rxpkt)); + + switch (readb(&PacketP->dest_port)) { + case BOOT_RUP: + rio_dprintk(RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", readb(&PacketP->len) & 0x80 ? "Command" : "Data", readb(&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 (readb(&PacketP->data[5]) == RIOC_MEMDUMP) { + rio_dprintk(RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", readw(&(PacketP->data[6]))); + rio_memcpy_fromio(p->RIOMemDump, &(PacketP->data[8]), 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", readb(&PacketP->dest_port)); + FreeMe = 1; + break; + } + + if (FreeMe) { + rio_dprintk(RIO_DEBUG_CMD, "Free processed incoming command packet\n"); + put_free_end(HostP, PacketP); + + writew(RX_RUP_INACTIVE, &UnixRupP->RupP->rxcontrol); + + if (readw(&UnixRupP->RupP->handshake) == PHB_HANDSHAKE_SET) { + rio_dprintk(RIO_DEBUG_CMD, "Handshake rup %d\n", Rup); + writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &UnixRupP->RupP->handshake); + } + } + } + + /* + ** IF a command was running on the port, + ** and it has completed, then tidy it up. + */ + if ((CmdBlkP = UnixRupP->CmdPendingP) && /* ASSIGN! */ + (readw(&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 %p completed\n", 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) && (readw(&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! + */ + if (!(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) : 1)) { + rio_dprintk(RIO_DEBUG_CMD, "Not ready to start command %p\n", CmdBlkP); + } else { + rio_dprintk(RIO_DEBUG_CMD, "Start new command %p Cmd byte is 0x%x\n", CmdBlkP, CmdBlkP->Packet.data[0]); + /* + ** Whammy! blat that pack! + */ + HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct 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 + */ + writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol); + + /* + ** the command block will be freed + ** when the command has been processed. + */ + } + } + spin_unlock_irqrestore(&UnixRupP->RupLock, flags); + } while (Rup); +} + +int RIOWFlushMark(unsigned long iPortP, struct CmdBlk *CmdBlkP) +{ + struct Port *PortP = (struct Port *) iPortP; + unsigned long flags; + + rio_spin_lock_irqsave(&PortP->portSem, flags); + PortP->WflushFlag++; + PortP->MagicFlags |= MAGIC_FLUSH; + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + return RIOUnUse(iPortP, CmdBlkP); +} + +int RIORFlushEnable(unsigned long iPortP, struct CmdBlk *CmdBlkP) +{ + struct Port *PortP = (struct Port *) iPortP; + struct PKT __iomem *PacketP; + unsigned long flags; + + rio_spin_lock_irqsave(&PortP->portSem, flags); + + while (can_remove_receive(&PacketP, PortP)) { + remove_receive(PortP); + put_free_end(PortP->HostP, PacketP); + } + + if (readw(&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"); + writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &PortP->PhbP->handshake); + } + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + return RIOUnUse(iPortP, CmdBlkP); +} + +int RIOUnUse(unsigned long iPortP, struct CmdBlk *CmdBlkP) +{ + struct Port *PortP = (struct Port *) iPortP; + unsigned long flags; + + rio_spin_lock_irqsave(&PortP->portSem, flags); + + 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. + */ + writew(1, &PortP->HostP->ParmMapP->tx_intr); + /* What to do here .. + wakeup( (caddr_t)&(PortP->InUse) ); + */ + rio_spin_unlock_irqrestore(&PortP->portSem, flags); + return 0; +} + +/* +** +** 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 processor 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(). +** +*/ |
