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[PATCH] DAC960: add support for Mylex AcceleRAID 4/5/600
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This patch adds support for a new class of DAC960 controllers.  It's based
on the GPLed idac320 driver from IBM for Linux 2.4.18.  That driver is a
fork of the 2.4.18 version of DAC960 that adds support for this new type of
controllers (internally called "GEM Series"), that differ from other DAC960
V2 firmware controllers only in the register offsets and removes support
for all others.

This patch instead integrates support for these controllers into the DAC960
driver.

Thanks to Anders Norrbring for pointing me to the idac320 driver and
testing this patch.

No Signed-Off: line because all code is either copy & pasted from IBM's
idac320 driver or support for other controllers in the 2.6 DAC960 driver.

Note: the really odd formating matches the rest of the DAC960 driver.

Cc: Dave Olien <dmo@osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Christoph Hellwig authored and Linus Torvalds committed May 5, 2005
1 parent c835a38 commit 5b76ffd
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132 changes: 132 additions & 0 deletions drivers/block/DAC960.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
Linux Driver for Mylex DAC960/AcceleRAID/eXtremeRAID PCI RAID Controllers
Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
Portions Copyright 2002 by Mylex (An IBM Business Unit)
This program is free software; you may redistribute and/or modify it under
the terms of the GNU General Public License Version 2 as published by the
Expand Down Expand Up @@ -532,6 +533,34 @@ static void DAC960_WaitForCommand(DAC960_Controller_T *Controller)
spin_lock_irq(&Controller->queue_lock);
}

/*
DAC960_GEM_QueueCommand queues Command for DAC960 GEM Series Controllers.
*/

static void DAC960_GEM_QueueCommand(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
DAC960_V2_CommandMailbox_T *NextCommandMailbox =
Controller->V2.NextCommandMailbox;

CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
DAC960_GEM_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);

if (Controller->V2.PreviousCommandMailbox1->Words[0] == 0 ||
Controller->V2.PreviousCommandMailbox2->Words[0] == 0)
DAC960_GEM_MemoryMailboxNewCommand(ControllerBaseAddress);

Controller->V2.PreviousCommandMailbox2 =
Controller->V2.PreviousCommandMailbox1;
Controller->V2.PreviousCommandMailbox1 = NextCommandMailbox;

if (++NextCommandMailbox > Controller->V2.LastCommandMailbox)
NextCommandMailbox = Controller->V2.FirstCommandMailbox;

Controller->V2.NextCommandMailbox = NextCommandMailbox;
}

/*
DAC960_BA_QueueCommand queues Command for DAC960 BA Series Controllers.
Expand Down Expand Up @@ -1464,6 +1493,17 @@ static boolean DAC960_V2_EnableMemoryMailboxInterface(DAC960_Controller_T
Controller->V2.FirstStatusMailboxDMA;
switch (Controller->HardwareType)
{
case DAC960_GEM_Controller:
while (DAC960_GEM_HardwareMailboxFullP(ControllerBaseAddress))
udelay(1);
DAC960_GEM_WriteHardwareMailbox(ControllerBaseAddress, CommandMailboxDMA);
DAC960_GEM_HardwareMailboxNewCommand(ControllerBaseAddress);
while (!DAC960_GEM_HardwareMailboxStatusAvailableP(ControllerBaseAddress))
udelay(1);
CommandStatus = DAC960_GEM_ReadCommandStatus(ControllerBaseAddress);
DAC960_GEM_AcknowledgeHardwareMailboxInterrupt(ControllerBaseAddress);
DAC960_GEM_AcknowledgeHardwareMailboxStatus(ControllerBaseAddress);
break;
case DAC960_BA_Controller:
while (DAC960_BA_HardwareMailboxFullP(ControllerBaseAddress))
udelay(1);
Expand Down Expand Up @@ -2627,6 +2667,9 @@ static void DAC960_DetectCleanup(DAC960_Controller_T *Controller)
if (Controller->MemoryMappedAddress) {
switch(Controller->HardwareType)
{
case DAC960_GEM_Controller:
DAC960_GEM_DisableInterrupts(Controller->BaseAddress);
break;
case DAC960_BA_Controller:
DAC960_BA_DisableInterrupts(Controller->BaseAddress);
break;
Expand Down Expand Up @@ -2705,6 +2748,9 @@ DAC960_DetectController(struct pci_dev *PCI_Device,

switch (Controller->HardwareType)
{
case DAC960_GEM_Controller:
Controller->PCI_Address = pci_resource_start(PCI_Device, 0);
break;
case DAC960_BA_Controller:
Controller->PCI_Address = pci_resource_start(PCI_Device, 0);
break;
Expand Down Expand Up @@ -2756,6 +2802,36 @@ DAC960_DetectController(struct pci_dev *PCI_Device,
BaseAddress = Controller->BaseAddress;
switch (Controller->HardwareType)
{
case DAC960_GEM_Controller:
DAC960_GEM_DisableInterrupts(BaseAddress);
DAC960_GEM_AcknowledgeHardwareMailboxStatus(BaseAddress);
udelay(1000);
while (DAC960_GEM_InitializationInProgressP(BaseAddress))
{
if (DAC960_GEM_ReadErrorStatus(BaseAddress, &ErrorStatus,
&Parameter0, &Parameter1) &&
DAC960_ReportErrorStatus(Controller, ErrorStatus,
Parameter0, Parameter1))
goto Failure;
udelay(10);
}
if (!DAC960_V2_EnableMemoryMailboxInterface(Controller))
{
DAC960_Error("Unable to Enable Memory Mailbox Interface "
"for Controller at\n", Controller);
goto Failure;
}
DAC960_GEM_EnableInterrupts(BaseAddress);
Controller->QueueCommand = DAC960_GEM_QueueCommand;
Controller->ReadControllerConfiguration =
DAC960_V2_ReadControllerConfiguration;
Controller->ReadDeviceConfiguration =
DAC960_V2_ReadDeviceConfiguration;
Controller->ReportDeviceConfiguration =
DAC960_V2_ReportDeviceConfiguration;
Controller->QueueReadWriteCommand =
DAC960_V2_QueueReadWriteCommand;
break;
case DAC960_BA_Controller:
DAC960_BA_DisableInterrupts(BaseAddress);
DAC960_BA_AcknowledgeHardwareMailboxStatus(BaseAddress);
Expand Down Expand Up @@ -5189,6 +5265,47 @@ static void DAC960_V2_ProcessCompletedCommand(DAC960_Command_T *Command)
wake_up(&Controller->CommandWaitQueue);
}

/*
DAC960_GEM_InterruptHandler handles hardware interrupts from DAC960 GEM Series
Controllers.
*/

static irqreturn_t DAC960_GEM_InterruptHandler(int IRQ_Channel,
void *DeviceIdentifier,
struct pt_regs *InterruptRegisters)
{
DAC960_Controller_T *Controller = (DAC960_Controller_T *) DeviceIdentifier;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V2_StatusMailbox_T *NextStatusMailbox;
unsigned long flags;

spin_lock_irqsave(&Controller->queue_lock, flags);
DAC960_GEM_AcknowledgeInterrupt(ControllerBaseAddress);
NextStatusMailbox = Controller->V2.NextStatusMailbox;
while (NextStatusMailbox->Fields.CommandIdentifier > 0)
{
DAC960_V2_CommandIdentifier_T CommandIdentifier =
NextStatusMailbox->Fields.CommandIdentifier;
DAC960_Command_T *Command = Controller->Commands[CommandIdentifier-1];
Command->V2.CommandStatus = NextStatusMailbox->Fields.CommandStatus;
Command->V2.RequestSenseLength =
NextStatusMailbox->Fields.RequestSenseLength;
Command->V2.DataTransferResidue =
NextStatusMailbox->Fields.DataTransferResidue;
NextStatusMailbox->Words[0] = 0;
if (++NextStatusMailbox > Controller->V2.LastStatusMailbox)
NextStatusMailbox = Controller->V2.FirstStatusMailbox;
DAC960_V2_ProcessCompletedCommand(Command);
}
Controller->V2.NextStatusMailbox = NextStatusMailbox;
/*
Attempt to remove additional I/O Requests from the Controller's
I/O Request Queue and queue them to the Controller.
*/
DAC960_ProcessRequest(Controller);
spin_unlock_irqrestore(&Controller->queue_lock, flags);
return IRQ_HANDLED;
}

/*
DAC960_BA_InterruptHandler handles hardware interrupts from DAC960 BA Series
Expand Down Expand Up @@ -6962,6 +7079,14 @@ static void DAC960_gam_cleanup(void)

#endif /* DAC960_GAM_MINOR */

static struct DAC960_privdata DAC960_GEM_privdata = {
.HardwareType = DAC960_GEM_Controller,
.FirmwareType = DAC960_V2_Controller,
.InterruptHandler = DAC960_GEM_InterruptHandler,
.MemoryWindowSize = DAC960_GEM_RegisterWindowSize,
};


static struct DAC960_privdata DAC960_BA_privdata = {
.HardwareType = DAC960_BA_Controller,
.FirmwareType = DAC960_V2_Controller,
Expand Down Expand Up @@ -7005,6 +7130,13 @@ static struct DAC960_privdata DAC960_P_privdata = {
};

static struct pci_device_id DAC960_id_table[] = {
{
.vendor = PCI_VENDOR_ID_MYLEX,
.device = PCI_DEVICE_ID_MYLEX_DAC960_GEM,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (unsigned long) &DAC960_GEM_privdata,
},
{
.vendor = PCI_VENDOR_ID_MYLEX,
.device = PCI_DEVICE_ID_MYLEX_DAC960_BA,
Expand Down
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