/*******************************************************************************
*
* Function : PlxChip_MailboxWrite
*
* Description: Writes to a PLX mailbox register
*
******************************************************************************/
PLX_STATUS
PlxChip_MailboxWrite(
DEVICE_EXTENSION *pdx,
U16 mailbox,
U32 value
)
{
U16 offset;
// Verify valid mailbox
if (((S16)mailbox < 0) || ((S16)mailbox > 7))
{
return ApiInvalidIndex;
}
// Set mailbox register base
if ((mailbox == 0) || (mailbox == 1))
offset = 0x78;
else
offset = 0x40;
// Calculate mailbox offset
offset = offset + (mailbox * sizeof(U32));
// Write mailbox
PLX_9000_REG_WRITE(
pdx,
offset,
value
);
return ApiSuccess;
}
/******************************************************************************
*
* Function : PlxChip_EepromWriteByOffset
*
* Description: Write a 32-bit value to the EEPROM at a specified offset
*
******************************************************************************/
PLX_STATUS
PlxChip_EepromWriteByOffset(
DEVICE_EXTENSION *pdx,
U16 offset,
U32 value
)
{
U32 RegisterSave;
// Verify the offset
if ((offset & 0x3) || (offset > 0x200))
{
DebugPrintf(("ERROR - Invalid EEPROM offset\n"));
return ApiInvalidOffset;
}
// Unprotect the EEPROM for write access
RegisterSave =
PLX_9000_REG_READ(
pdx,
PCI9056_ENDIAN_DESC
);
PLX_9000_REG_WRITE(
pdx,
PCI9056_ENDIAN_DESC,
RegisterSave & ~(0xFF << 16)
);
// Write to EEPROM
Plx9000_EepromWriteByOffset(
pdx,
offset,
value
);
// Restore EEPROM Write-Protected Address Boundary
PLX_9000_REG_WRITE(
pdx,
PCI9056_ENDIAN_DESC,
RegisterSave
);
return ApiSuccess;
}
/*******************************************************************************
*
* Function : PlxSynchronizedRegisterModify
*
* Description: Synchronized function with ISR to modify a PLX register
*
******************************************************************************/
BOOLEAN
PlxSynchronizedRegisterModify(
PLX_REG_DATA *pRegData
)
{
unsigned long flags;
U32 RegValue;
/*************************************************
* This routine sychronizes modification of a
* register with the ISR. To do this, it uses
* a special spinlock routine provided by the
* kernel, which will temporarily disable interrupts.
* This code should also work on SMP systems.
************************************************/
// Disable interrupts and acquire lock
spin_lock_irqsave(
&(pRegData->pdx->Lock_Isr),
flags
);
RegValue =
PLX_9000_REG_READ(
pRegData->pdx,
pRegData->offset
);
RegValue |= pRegData->BitsToSet;
RegValue &= ~(pRegData->BitsToClear);
PLX_9000_REG_WRITE(
pRegData->pdx,
pRegData->offset,
RegValue
);
// Re-enable interrupts and release lock
spin_unlock_irqrestore(
&(pRegData->pdx->Lock_Isr),
flags
);
return TRUE;
}
/*******************************************************************************
*
* Function : OnInterrupt
*
* Description: The Interrupt Service Routine for the PLX device
*
******************************************************************************/
irqreturn_t
OnInterrupt(
int irq,
void *dev_id
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
, struct pt_regs *regs
#endif
)
{
U32 RegValue;
U32 RegPciInt;
U32 InterruptSource;
DEVICE_EXTENSION *pdx;
// Get the device extension
pdx = (DEVICE_EXTENSION *)dev_id;
// Disable interrupts and acquire lock
spin_lock( &(pdx->Lock_Isr) );
// Read interrupt status register
RegPciInt =
PLX_9000_REG_READ(
pdx,
PCI9056_INT_CTRL_STAT
);
/****************************************************
* If the chip is in a low power state, then local
* register reads are disabled and will always return
* 0xFFFFFFFF. If the PLX chip's interrupt is shared
* with another PCI device, the PXL ISR may continue
* to be called. This case is handled to avoid
* erroneous reporting of an active interrupt.
***************************************************/
if (RegPciInt == 0xFFFFFFFF)
{
spin_unlock( &(pdx->Lock_Isr) );
return IRQ_RETVAL(IRQ_NONE);
}
// Check for master PCI interrupt enable
if ((RegPciInt & (1 << 8)) == 0)
{
spin_unlock( &(pdx->Lock_Isr) );
return IRQ_RETVAL(IRQ_NONE);
}
// Verify that an interrupt is truly active
// Clear the interrupt type flag
InterruptSource = INTR_TYPE_NONE;
// Check if PCI Doorbell Interrupt is active and not masked
if ((RegPciInt & (1 << 13)) && (RegPciInt & (1 << 9)))
{
InterruptSource |= INTR_TYPE_DOORBELL;
}
// Check if PCI Abort Interrupt is active and not masked
if ((RegPciInt & (1 << 14)) && (RegPciInt & (1 << 10)))
{
InterruptSource |= INTR_TYPE_PCI_ABORT;
}
// Check if Local->PCI Interrupt is active and not masked
if ((RegPciInt & (1 << 15)) && (RegPciInt & (1 << 11)))
{
InterruptSource |= INTR_TYPE_LOCAL_1;
}
// Check if DMA Channel 0 Interrupt is active and not masked
if ((RegPciInt & (1 << 21)) && (RegPciInt & (1 << 18)))
{
// Verify the DMA interrupt is routed to PCI
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA0_MODE
);
if (RegValue & (1 << 17))
{
InterruptSource |= INTR_TYPE_DMA_0;
}
}
// Check if DMA Channel 1 Interrupt is active and not masked
if ((RegPciInt & (1 << 22)) && (RegPciInt & (1 << 19)))
{
// Verify the DMA interrupt is routed to PCI
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA1_MODE
);
if (RegValue & (1 << 17))
{
InterruptSource |= INTR_TYPE_DMA_1;
}
}
// Check if MU Outbound Post interrupt is active
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_OUTPOST_INT_STAT
);
if (RegValue & (1 << 3))
{
// Check if MU Outbound Post interrupt is not masked
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_OUTPOST_INT_MASK
);
if ((RegValue & (1 << 3)) == 0)
{
InterruptSource |= INTR_TYPE_OUTBOUND_POST;
}
}
// Return if no interrupts are active
if (InterruptSource == INTR_TYPE_NONE)
{
spin_unlock( &(pdx->Lock_Isr) );
return IRQ_RETVAL(IRQ_NONE);
}
// At this point, the device interrupt is verified
// Mask the PCI Interrupt
PLX_9000_REG_WRITE(
pdx,
PCI9056_INT_CTRL_STAT,
RegPciInt & ~(1 << 8)
);
// Re-enable interrupts and release lock
spin_unlock( &(pdx->Lock_Isr) );
//
// Schedule deferred procedure (DPC) to complete interrupt processing
//
// Provide interrupt source to DPC
pdx->Source_Ints = InterruptSource;
// If device is no longer started, do not schedule a DPC
if (pdx->State != PLX_STATE_STARTED)
return IRQ_RETVAL(IRQ_HANDLED);
// Add task to system work queue
schedule_work(
&(pdx->Task_DpcForIsr)
);
// Flag a DPC is pending
pdx->bDpcPending = TRUE;
return IRQ_RETVAL(IRQ_HANDLED);
}
/*******************************************************************************
*
* Function : DpcForIsr
*
* Description: This routine will be triggered by the ISR to service an interrupt
*
******************************************************************************/
VOID
DpcForIsr(
PLX_DPC_PARAM *pArg1
)
{
U32 RegValue;
unsigned long flags;
DEVICE_EXTENSION *pdx;
PLX_INTERRUPT_DATA IntData;
// Get the device extension
pdx =
container_of(
pArg1,
DEVICE_EXTENSION,
Task_DpcForIsr
);
// Abort DPC if device is being stopped and resources released
if ((pdx->State != PLX_STATE_STARTED) || (pdx->PciBar[0].pVa == NULL))
{
DebugPrintf(("DPC aborted, device is stopping\n"));
// Flag DPC is no longer pending
pdx->bDpcPending = FALSE;
return;
}
// Get interrupt source
IntData.Source_Ints = pdx->Source_Ints;
IntData.Source_Doorbell = 0;
// Local Interrupt 1
if (IntData.Source_Ints & INTR_TYPE_LOCAL_1)
{
// Synchronize access to Interrupt Control/Status Register
spin_lock_irqsave( &(pdx->Lock_Isr), flags );
// Mask local interrupt 1 since true source is unknown
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_INT_CTRL_STAT
);
RegValue &= ~(1 << 11);
PLX_9000_REG_WRITE(
pdx,
PCI9056_INT_CTRL_STAT,
RegValue
);
spin_unlock_irqrestore( &(pdx->Lock_Isr), flags );
}
// Doorbell Interrupt
if (IntData.Source_Ints & INTR_TYPE_DOORBELL)
{
// Get Doorbell register
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_PCI_DOORBELL
);
// Clear Doorbell interrupt
PLX_9000_REG_WRITE(
pdx,
PCI9056_PCI_DOORBELL,
RegValue
);
// Save the doorbell value
IntData.Source_Doorbell = RegValue;
}
// PCI Abort interrupt
if (IntData.Source_Ints & INTR_TYPE_PCI_ABORT)
{
// Get the PCI Command register
PLX_PCI_REG_READ(
pdx,
0x04,
&RegValue
);
// Write to back to clear PCI Abort
PLX_PCI_REG_WRITE(
pdx,
0x04,
RegValue
);
}
// DMA Channel 0 interrupt
if (IntData.Source_Ints & INTR_TYPE_DMA_0)
{
// Get DMA Control/Status
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
// Clear DMA interrupt
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue | (1 << 3)
);
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA0_MODE
);
// Check if SGL is enabled & cleanup
if (RegValue & (1 << 9))
{
PlxSglDmaTransferComplete(
pdx,
0
);
}
}
// DMA Channel 1 interrupt
if (IntData.Source_Ints & INTR_TYPE_DMA_1)
{
// Get DMA Control/Status
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
// Clear DMA interrupt
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue | (1 << 11)
);
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA1_MODE
);
// Check if SGL is enabled & cleanup
if (RegValue & (1 << 9))
{
PlxSglDmaTransferComplete(
pdx,
1
);
}
}
// Outbound post FIFO interrupt
if (IntData.Source_Ints & INTR_TYPE_OUTBOUND_POST)
{
// Mask Outbound Post interrupt
PLX_9000_REG_WRITE(
pdx,
PCI9056_OUTPOST_INT_MASK,
(1 << 3)
);
}
// Signal any objects waiting for notification
PlxSignalNotifications(
pdx,
&IntData
);
// Re-enable interrupts
PlxChipInterruptsEnable(
pdx
);
// Flag a DPC is no longer pending
pdx->bDpcPending = FALSE;
}
/******************************************************************************
*
* Function : PlxChip_DmaControl
*
* Description: Control the DMA engine
*
******************************************************************************/
PLX_STATUS
PlxChip_DmaControl(
DEVICE_EXTENSION *pdx,
U8 channel,
PLX_DMA_COMMAND command,
VOID *pOwner
)
{
U8 shift;
U32 RegValue;
// Verify valid DMA channel
switch (channel)
{
case 0:
case 1:
break;
default:
DebugPrintf(("ERROR - Invalid DMA channel\n"));
return ApiDmaChannelInvalid;
}
// Verify owner
if ((pdx->DmaInfo[channel].bOpen) && (pdx->DmaInfo[channel].pOwner != pOwner))
{
DebugPrintf(("ERROR - DMA owned by different process\n"));
return ApiDeviceInUse;
}
// Set shift for status register
shift = (channel * 8);
switch (command)
{
case DmaPause:
// Pause the DMA Channel
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue & ~((1 << 0) << shift)
);
// Check if the transfer has completed
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
if (RegValue & ((1 << 4) << shift))
return ApiDmaDone;
break;
case DmaResume:
// Verify that the DMA Channel is paused
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
if ((RegValue & (((1 << 4) | (1 << 0)) << shift)) == 0)
{
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue | ((1 << 0) << shift)
);
}
else
{
return ApiDmaInProgress;
}
break;
case DmaAbort:
// Pause the DMA Channel
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue & ~((1 << 0) << shift)
);
// Check if the transfer has completed
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
if (RegValue & ((1 << 4) << shift))
return ApiDmaDone;
// Abort the transfer (should cause an interrupt)
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue | ((1 << 2) << shift)
);
break;
default:
return ApiDmaCommandInvalid;
}
return ApiSuccess;
}
/******************************************************************************
*
* Function : PlxChip_DmaSetProperties
*
* Description: Sets the current DMA properties
*
******************************************************************************/
PLX_STATUS
PlxChip_DmaSetProperties(
DEVICE_EXTENSION *pdx,
U8 channel,
PLX_DMA_PROP *pProp,
VOID *pOwner
)
{
U16 OffsetMode;
U32 RegValue;
// Verify valid DMA channel
switch (channel)
{
case 0:
OffsetMode = PCI9056_DMA0_MODE;
break;
case 1:
OffsetMode = PCI9056_DMA1_MODE;
break;
default:
DebugPrintf(("ERROR - Invalid DMA channel\n"));
return ApiDmaChannelInvalid;
}
// Verify owner
if ((pdx->DmaInfo[channel].bOpen) && (pdx->DmaInfo[channel].pOwner != pOwner))
{
DebugPrintf(("ERROR - DMA owned by different process\n"));
return ApiDeviceInUse;
}
// Verify DMA not in progress
if (PlxChip_DmaStatus(
pdx,
channel,
pOwner
) != ApiDmaDone)
{
DebugPrintf(("ERROR - DMA transfer in progress\n"));
return ApiDmaInProgress;
}
// Set DMA properties
RegValue =
(pProp->LocalBusWidth << 0) |
(pProp->WaitStates << 2) |
(pProp->ReadyInput << 6) |
(pProp->BurstInfinite << 7) |
(pProp->Burst << 8) |
(pProp->SglMode << 9) |
(pProp->DoneInterrupt << 10) |
(pProp->ConstAddrLocal << 11) |
(pProp->DemandMode << 12) |
(pProp->WriteInvalidMode << 13) |
(pProp->EnableEOT << 14) |
(pProp->FastTerminateMode << 15) |
(pProp->ClearCountMode << 16) |
(pProp->RouteIntToPci << 17) |
(pProp->DualAddressMode << 18) |
(pProp->EOTEndLink << 19) |
(pProp->ValidMode << 20) |
(pProp->ValidStopControl << 21);
// Update properties
PLX_9000_REG_WRITE(
pdx,
OffsetMode,
RegValue
);
return ApiSuccess;
}
/******************************************************************************
*
* Function : PlxChip_BoardReset
*
* Description: Resets a device using software reset feature of PLX chip
*
******************************************************************************/
PLX_STATUS
PlxChip_BoardReset(
DEVICE_EXTENSION *pdx
)
{
U8 MU_Enabled;
U8 EepromPresent;
U32 RegValue;
U32 RegInterrupt;
U32 RegHotSwap;
U32 RegPowerMgmnt;
// Clear any PCI errors (04[31:27])
PLX_PCI_REG_READ(
pdx,
0x04,
&RegValue
);
if (RegValue & (0xf8 << 24))
{
// Write value back to clear aborts
PLX_PCI_REG_WRITE(
pdx,
0x04,
RegValue
);
}
// Save state of I2O Decode Enable
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_FIFO_CTRL_STAT
);
MU_Enabled = (U8)(RegValue & (1 << 0));
// Determine if an EEPROM is present
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_EEPROM_CTRL_STAT
);
// Make sure S/W Reset & EEPROM reload bits are clear
RegValue &= ~((1 << 30) | (1 << 29));
// Remember if EEPROM is present
EepromPresent = (U8)((RegValue >> 28) & (1 << 0));
// Save interrupt line
PLX_PCI_REG_READ(
pdx,
0x3C,
&RegInterrupt
);
// Save some registers if EEPROM present
if (EepromPresent)
{
PLX_PCI_REG_READ(
pdx,
PCI9056_HS_CAP_ID,
&RegHotSwap
);
PLX_PCI_REG_READ(
pdx,
PCI9056_PM_CSR,
&RegPowerMgmnt
);
}
// Issue Software Reset to hold PLX chip in reset
PLX_9000_REG_WRITE(
pdx,
PCI9056_EEPROM_CTRL_STAT,
RegValue | (1 << 30)
);
// Delay for a bit
Plx_sleep(100);
// Bring chip out of reset
PLX_9000_REG_WRITE(
pdx,
PCI9056_EEPROM_CTRL_STAT,
RegValue
);
// Issue EEPROM reload in case now programmed
PLX_9000_REG_WRITE(
pdx,
PCI9056_EEPROM_CTRL_STAT,
RegValue | (1 << 29)
);
// Delay for a bit
Plx_sleep(10);
// Clear EEPROM reload
PLX_9000_REG_WRITE(
pdx,
PCI9056_EEPROM_CTRL_STAT,
RegValue
);
// Restore I2O Decode Enable state
if (MU_Enabled)
{
// Save state of I2O Decode Enable
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_FIFO_CTRL_STAT
);
PLX_9000_REG_WRITE(
pdx,
PCI9056_FIFO_CTRL_STAT,
RegValue | (1 << 0)
);
}
// Restore interrupt line
PLX_PCI_REG_WRITE(
pdx,
0x3C,
RegInterrupt
);
// If EEPROM was present, restore registers
if (EepromPresent)
{
// Mask out HS bits that can be cleared
RegHotSwap &= ~((1 << 23) | (1 << 22) | (1 << 17));
PLX_PCI_REG_WRITE(
pdx,
PCI9056_HS_CAP_ID,
RegHotSwap
);
// Mask out PM bits that can be cleared
RegPowerMgmnt &= ~(1 << 15);
PLX_PCI_REG_READ(
pdx,
PCI9056_PM_CSR,
&RegPowerMgmnt
);
}
return ApiSuccess;
}
/******************************************************************************
*
* Function : PlxChip_InterruptDisable
*
* Description: Disables specific interrupts of the PLX Chip
*
******************************************************************************/
PLX_STATUS
PlxChip_InterruptDisable(
DEVICE_EXTENSION *pdx,
PLX_INTERRUPT *pPlxIntr
)
{
U32 QueueCsr;
U32 QueueCsr_Original;
U32 RegValue;
PLX_REG_DATA RegData;
// Setup to synchronize access to Interrupt Control/Status Register
RegData.pdx = pdx;
RegData.offset = PCI9056_INT_CTRL_STAT;
RegData.BitsToSet = 0;
RegData.BitsToClear = 0;
if (pPlxIntr->PciMain)
RegData.BitsToClear |= (1 << 8);
if (pPlxIntr->PciAbort)
RegData.BitsToClear |= (1 << 10);
if (pPlxIntr->TargetRetryAbort)
RegData.BitsToClear |= (1 << 12);
if (pPlxIntr->LocalToPci & (1 << 0))
RegData.BitsToClear |= (1 << 11);
if (pPlxIntr->Doorbell)
RegData.BitsToClear |= (1 << 9);
if (pPlxIntr->DmaDone & (1 << 0))
{
// Check if DMA interrupt is routed to PCI
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA0_MODE
);
if (RegValue & (1 << 17))
{
RegData.BitsToClear |= (1 << 18);
// Disable DMA interrupt enable
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA0_MODE,
RegValue & ~(1 << 10)
);
}
}
if (pPlxIntr->DmaDone & (1 << 1))
{
// Check if DMA interrupt is routed to PCI
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA1_MODE
);
if (RegValue & (1 << 17))
{
RegData.BitsToClear |= (1 << 19);
// Disable DMA interrupt enable
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA1_MODE,
RegValue & ~(1 << 10)
);
}
}
// Inbound Post Queue Interrupt Control/Status Register
QueueCsr_Original =
PLX_9000_REG_READ(
pdx,
PCI9056_FIFO_CTRL_STAT
);
QueueCsr = QueueCsr_Original;
if (pPlxIntr->MuOutboundPost)
{
PLX_9000_REG_WRITE(
pdx,
PCI9056_OUTPOST_INT_MASK,
(1 << 3)
);
}
if (pPlxIntr->MuInboundPost)
QueueCsr |= (1 << 4);
if (pPlxIntr->MuOutboundOverflow)
QueueCsr |= (1 << 6);
// Write register values if they have changed
if (RegData.BitsToClear != 0)
{
// Synchronize write of Interrupt Control/Status Register
PlxSynchronizedRegisterModify(
&RegData
);
}
if (QueueCsr != QueueCsr_Original)
{
PLX_9000_REG_WRITE(
pdx,
PCI9056_FIFO_CTRL_STAT,
QueueCsr
);
}
return ApiSuccess;
}
/******************************************************************************
*
* Function : PlxChip_DmaTransferUserBuffer
*
* Description: Transfers a user-mode buffer using SGL DMA
*
******************************************************************************/
PLX_STATUS
PlxChip_DmaTransferUserBuffer(
DEVICE_EXTENSION *pdx,
U8 channel,
PLX_DMA_PARAMS *pParams,
VOID *pOwner
)
{
U8 shift;
U16 OffsetMode;
U32 RegValue;
U32 SglPciAddress;
BOOLEAN bBits64;
PLX_STATUS rc;
// Verify DMA channel & setup register offsets
switch (channel)
{
case 0:
OffsetMode = PCI9056_DMA0_MODE;
break;
case 1:
OffsetMode = PCI9056_DMA1_MODE;
break;
default:
DebugPrintf(("ERROR - Invalid DMA channel\n"));
return ApiDmaChannelInvalid;
}
// Verify owner
if (pdx->DmaInfo[channel].pOwner != pOwner)
{
DebugPrintf(("ERROR - DMA owned by different process\n"));
return ApiDeviceInUse;
}
// Set shift for status register
shift = (channel * 8);
// Verify that DMA is not in progress
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
if ((RegValue & ((1 << 4) << shift)) == 0)
{
DebugPrintf(("ERROR - DMA channel is currently active\n"));
return ApiDmaInProgress;
}
spin_lock(
&(pdx->Lock_Dma[channel])
);
// Verify DMA channel was opened
if (pdx->DmaInfo[channel].bOpen == FALSE)
{
DebugPrintf(("ERROR - DMA channel has not been opened\n"));
spin_unlock(
&(pdx->Lock_Dma[channel])
);
return ApiDmaChannelUnavailable;
}
// Verify an SGL DMA transfer is not pending
if (pdx->DmaInfo[channel].bSglPending)
{
DebugPrintf(("ERROR - An SGL DMA transfer is currently pending\n"));
spin_unlock(
&(pdx->Lock_Dma[channel])
);
return ApiDmaInProgress;
}
// Set the SGL DMA pending flag
pdx->DmaInfo[channel].bSglPending = TRUE;
spin_unlock(
&(pdx->Lock_Dma[channel])
);
// Get DMA mode
RegValue =
PLX_9000_REG_READ(
pdx,
OffsetMode
);
// Keep track if local address should remain constant
if (RegValue & (1 << 11))
pdx->DmaInfo[channel].bConstAddrLocal = TRUE;
else
pdx->DmaInfo[channel].bConstAddrLocal = FALSE;
// Page-lock user buffer & build SGL
rc =
PlxLockBufferAndBuildSgl(
pdx,
channel,
pParams,
&SglPciAddress,
&bBits64
);
if (rc != ApiSuccess)
{
DebugPrintf(("ERROR - Unable to lock buffer and build SGL list\n"));
pdx->DmaInfo[channel].bSglPending = FALSE;
return rc;
}
spin_lock(
&(pdx->Lock_Dma[channel])
);
// Disable valid mode
RegValue &= ~(1 << 20);
// Enable DMA chaining, interrupt, & route interrupt to PCI
RegValue |= (1 << 9) | (1 << 10) | (1 << 17);
// Enable dual-addressing DMA if 64-bit DMA is required
if (bBits64)
RegValue |= (1 << 18);
else
RegValue &= ~(1 << 18);
PLX_9000_REG_WRITE(
pdx,
OffsetMode,
RegValue
);
// Clear DAC upper 32-bit PCI address in case it contains non-zero value
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA0_PCI_DAC + (channel * sizeof(U32)),
0
);
// Write SGL physical address & set descriptors in PCI space
PLX_9000_REG_WRITE(
pdx,
OffsetMode + 0x10,
SglPciAddress | (1 << 0)
);
// Enable DMA channel
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue | ((1 << 0) << shift)
);
spin_unlock(
&(pdx->Lock_Dma[channel])
);
DebugPrintf(("Starting DMA transfer...\n"));
// Start DMA
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue | (((1 << 0) | (1 << 1)) << shift)
);
return ApiSuccess;
}
/******************************************************************************
*
* Function : PlxChip_DmaTransferBlock
*
* Description: Performs DMA block transfer
*
******************************************************************************/
PLX_STATUS
PlxChip_DmaTransferBlock(
DEVICE_EXTENSION *pdx,
U8 channel,
PLX_DMA_PARAMS *pParams,
VOID *pOwner
)
{
U8 shift;
U16 OffsetMode;
U32 RegValue;
// Verify DMA channel & setup register offsets
switch (channel)
{
case 0:
OffsetMode = PCI9056_DMA0_MODE;
break;
case 1:
OffsetMode = PCI9056_DMA1_MODE;
break;
default:
DebugPrintf(("ERROR - Invalid DMA channel\n"));
return ApiDmaChannelInvalid;
}
// Verify owner
if (pdx->DmaInfo[channel].pOwner != pOwner)
{
DebugPrintf(("ERROR - DMA owned by different process\n"));
return ApiDeviceInUse;
}
// Set shift for status register
shift = (channel * 8);
// Verify that DMA is not in progress
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
if ((RegValue & ((1 << 4) << shift)) == 0)
{
DebugPrintf(("ERROR - DMA channel is currently active\n"));
return ApiDmaInProgress;
}
spin_lock(
&(pdx->Lock_Dma[channel])
);
// Verify DMA channel was opened
if (pdx->DmaInfo[channel].bOpen == FALSE)
{
DebugPrintf(("ERROR - DMA channel has not been opened\n"));
spin_unlock(
&(pdx->Lock_Dma[channel])
);
return ApiDmaChannelUnavailable;
}
// Get DMA mode
RegValue =
PLX_9000_REG_READ(
pdx,
OffsetMode
);
// Disable DMA chaining & SGL dual-addressing
RegValue &= ~((1 << 9) | (1 << 18));
// Route interrupt to PCI
RegValue |= (1 << 17);
// Ignore interrupt if requested
if (pParams->bIgnoreBlockInt)
RegValue &= ~(1 << 10);
else
RegValue |= (1 << 10);
PLX_9000_REG_WRITE(
pdx,
OffsetMode,
RegValue
);
// Write PCI Address
PLX_9000_REG_WRITE(
pdx,
OffsetMode + 0x4,
PLX_64_LOW_32(pParams->PciAddr)
);
// Write Local Address
PLX_9000_REG_WRITE(
pdx,
OffsetMode + 0x8,
pParams->LocalAddr
);
// Write Transfer Count
PLX_9000_REG_WRITE(
pdx,
OffsetMode + 0xc,
pParams->ByteCount
);
// Write Descriptor Pointer
if (pParams->Direction == PLX_DMA_LOC_TO_PCI)
RegValue = (1 << 3);
else
RegValue = 0;
PLX_9000_REG_WRITE(
pdx,
OffsetMode + 0x10,
RegValue
);
// Write Dual Address cycle with upper 32-bit PCI address
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA0_PCI_DAC + (channel * sizeof(U32)),
PLX_64_HIGH_32(pParams->PciAddr)
);
// Enable DMA channel
RegValue =
PLX_9000_REG_READ(
pdx,
PCI9056_DMA_COMMAND_STAT
);
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue | ((1 << 0) << shift)
);
spin_unlock(
&(pdx->Lock_Dma[channel])
);
DebugPrintf(("Starting DMA transfer...\n"));
// Start DMA
PLX_9000_REG_WRITE(
pdx,
PCI9056_DMA_COMMAND_STAT,
RegValue | (((1 << 0) | (1 << 1)) << shift)
);
return ApiSuccess;
}
/*
**===========================================================================
** 8.0 pcidriver_ioctl()
**===========================================================================
** Description:
**
** Parameters: cmd and a argument
**
**
** Returns: some stuff ...
**
** Globals:
*/
int plx_drv_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
driver_t *dev = file->private_data;
static unsigned char localbuf[IOC_BUFSIZE];
/* Define "alias" names for the localbuf */
void *karg = localbuf;
Register *reg = karg;
unsigned long *klong = karg;
Container *container = karg;
int size = _IOC_SIZE(cmd); /* the size bitfield in cmd */
int retval = 0; /* success by default */
#if ZERO
PDEBUG(("function: %s, file: %s line: %d invoked\n", __FUNCTION__, __FILE__, __LINE__));
#endif
/*
* Extract the type and number bitfields, and don't decode
* wrong cmds: return EINVAL before verify_area()
*/
if (_IOC_TYPE(cmd) != MAG_NUM) return -ENOTTY;
if (_IOC_NR(cmd) > IOC_MAXNR) return -ENOTTY;
/*
* The direction is a bitmask, and VERIFY_WRITE catches R/W
* transfers. `Dir' is user-oriented, while
* verify_area is kernel-oriented, so the concept of "read" and
* "write" is reversed
*/
if (_IOC_DIR(cmd) & _IOC_READ) {
if (!access_ok(VERIFY_WRITE, (void *)arg, size))
return -EFAULT;
}
else if (_IOC_DIR(cmd) & _IOC_WRITE) {
if (!access_ok(VERIFY_READ, (void *)arg, size))
return -EFAULT;
}
#if ZERO
PDEBUG(("ioctl.c: %08x %08lx: nr %i, size %i, dir %i\n",
cmd, arg, _IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd)));
#endif
/* First, retrieve data from userspace */
if ((_IOC_DIR(cmd) & _IOC_WRITE) && (size <= IOC_BUFSIZE))
if (copy_from_user(karg, (void *)arg, size))
return -EFAULT;
/* We are ready to switch ... */
switch (cmd) {
case READ_PLX_REG:
{
if ((plx_read_plx_reg(dev, reg->addr, &(reg->data)) == 0)) {
// PDEBUG(("plx_read_fpga_reg: addr: %x and data %x\n", reg->addr, reg->data));
}
else
return -EIO;
}
break;
case WRITE_PLX_REG:
{
if((plx_write_plx_reg(dev, reg->addr, reg->data)) == 0) {
// PDEBUG(("plx_write_fpga_reg: addr: %x and data %x\n", reg->addr, reg->data));
}
else
return -EIO;
}
break;
case FILL_PCI_MEM:
PDEBUG(("plx_ioctl: Fill PCI memory with test pattern!\n"));
memset_io(dev->PciBar[2].pVa, 0x11, DMA_SIZE/4);
memset_io((dev->PciBar[2].pVa)+0x2000, 0x22, DMA_SIZE/4);
memset_io((dev->PciBar[2].pVa)+(0x2000*2), 0x33, DMA_SIZE/4);
memset_io((dev->PciBar[2].pVa)+(0x2000*3), 0x44, DMA_SIZE/4);
break;
case READ_FPGA_REG:
if ((plx_read_fpga_reg(dev, reg->addr, &(reg->data)) == 0)) {
PDEBUG(("plx_read_fpga_reg: addr: %x and data %x\n", reg->addr, reg->data));
}
else
return -EIO; // Physical input/output error occured
break;
case WRITE_FPGA_REG:
if((plx_write_fpga_reg(dev, reg->addr, reg->data)) == 0) {
PDEBUG(("plx_write_fpga_reg: addr: %x and data %x\n", reg->addr, reg->data));
}
else
return -EIO;
break;
case WRITE_SRAM:
if((plx_write_sram(dev, reg->addr, reg->data)) == 0) {
PDEBUG(("plx_write_sram: addr: %x and data %x\n", reg->addr, reg->data));
}
else
return -EIO;
break;
case READ_COMMAND_LINK_REG:
if ((plx_read_reg(dev, reg->addr, &(reg->data)) == 0)) {
PDEBUG(("plx_read_reg: addr: %x and data %x\n", reg->addr, reg->data));
}
else
return -EIO;
break;
case WRITE_COMMAND_LINK_REG:
PDEBUG(("ioctl.c: addr: %x and data %x\n", reg->addr, reg->data));
if((plx_write_reg(dev, reg->addr, reg->data)) == 0) {
PDEBUG(("plx_write_reg: addr: %x and data %x\n", reg->addr, reg->data));
}
else
return -EIO;
break;
case IMMEDIATE_COMMAND:
switch( *klong) {
case XL_EXEC:
/* Read the micro sec counter */
plx_diff_since_read(dev);
case XL_NOP:
case XL_INIT:
case XL_STOP:
if((plx_immediate_cmd(dev, *klong) == 0)) {
}
else {
retval = -EIO;
}
break;
default :
retval = -EFAULT;
}
break;
case ORDER_HW:
switch (container->order) {
case 0x1: // Dump PCI memory
{ int i; unsigned int tmp;
PDEBUG(("ioctl: order_hw, start_addr%x\n", container->start_addr));
for (i = 0; i <16; i++) {
tmp = SRAM_READ(dev, (container->start_addr) +(i*4));
container->array[i] = tmp;
}
}
break;
case 0x2: // Reset HW
plx_board_reset(dev);
break;
case 0x3: // Read and clear device driver counters
{
container->array[0] = dev->cntr_circ_empty_rp;
container->array[1] = dev->cntr_irq_count;
container->array[2] = dev->cntr_irq_processed;
container->array[3] = dev->cntr_irq_none;
container->array[4] = dev->cntr_low_power_state;
container->array[5] = dev->cntr_pci_master_disabled;
container->array[6] = dev->cntr_lost_ints;
container->array[7] = dev->cntr_read;
container->array[8] = dev->cntr_poll;
container->array[9] = dev->cntr_failed_dma;
container->array[10] = dev->cntr_circ_full_wp;
container->array[11] = dev->cntr_circ_full_ip;
container->array[12] = dev->cntr_2_user_space;
container->array[13] = dev->cntr_tmo_rdr;
container->array[14] = dev->cntr_tmo_tbe;
container->array[15] = dev->cntr_lost_hw_ints;
dev->cntr_circ_empty_rp = dev->cntr_irq_count = dev->cntr_irq_processed = dev->cntr_irq_none = 0;
dev->cntr_low_power_state = dev->cntr_pci_master_disabled = 0;
dev->cntr_read = dev->cntr_poll = dev->cntr_failed_dma = dev->cntr_2_user_space = 0;
dev->cntr_tmo_rdr = dev->cntr_tmo_tbe = dev->cntr_circ_full_wp = dev->cntr_lost_ints = 0;
dev->cntr_lost_hw_ints = dev->cntr_circ_full_ip = 0;
}
break;
case 0x4:
break;
case 0x5:
#if ZERO
PDEBUG(("order_hw: read time:%d\n", plx_diff_since_read(dev)));
#endif
break;
#if DMA_DEBUG
case 0x6:
{
int r;
/* Write a test pattern at start address in kernel mem */
for(r = 0; r < NO_OF_BUFFERS ; r++) {
*(unsigned long *)(dev->frames[r]) = 0xcdcdfbfb;
}
}
break;
case 0x7:
{
int r;
/* Read test pattern at start address in kernel mem */
for(r = 0; r < NO_OF_BUFFERS ; r++) {
PDEBUG(("r:%d:%lx\n", r, *(unsigned long *)(dev->frames[r])));
}
}
break;
case 0x8:
{
U32 RegValue;
/* Abort a DMA, should generate an interrupt */
RegValue =
PLX_9000_REG_READ(
dev,
PCI8311_DMA_COMMAND_STAT
);
// Abort the transfer (should cause an interrupt)
PLX_9000_REG_WRITE(
dev,
PCI8311_DMA_COMMAND_STAT,
RegValue | ((1 << 2))
);
}
break;
#endif
case 0x9:
PDEBUG(("order_hw: ip%d, wp%d, rp%d\n", dev->ip , dev->wp, dev->rp));
dev->wp = dev->rp = dev->ip = 0;
break;
/* Disable driver debug */
case 0xa:
debug = 0;
break;
/* Enable driver debug */
case 0xb:
debug = 1;
break;
/* Reset sequence counters in hw and driver */
case 0xc:
dev->seq_cntr = 0;
plx_immediate_cmd(dev, XL_INIT);
break;
/* Generate a local interrupt */
case 0xd:
{ u32 RegDetectorInt;
RegDetectorInt = COMMAND_LINK_REG_READ(dev, PCI_MC_CARD_STATUS);
RegDetectorInt |= (1<<29);
COMMAND_LINK_REG_WRITE(dev,PCI_MC_CARD_STATUS,RegDetectorInt);
}
break;
default:
ERROR(("ioctl: no such order: %x\n", container->order));
retval = -EFAULT;
break;
}
case DRIVER_VERSION:
reg->data = DEVICE_DRIVER_VERSION;
break;
case READ_CONFIG_REG:
{
PLX_PCI_REG_READ(dev, reg->addr,®->data);
}
break;
default:
ERROR(("ioctl: no such command: %x\n", cmd));
return -ENOIOCTLCMD;
}
/* Finally, copy data to user space and return */
if (retval < 0) return retval;
if ((_IOC_DIR(cmd) & _IOC_READ) && (size <= IOC_BUFSIZE))
if (copy_to_user((void *)arg, karg, size))
return -EFAULT;
return retval; /* sometimes, positive is what I want */
}
