/**
* interrupt_wait() will wait on the PCI interrupt line and determine if GPIO
* input or DMA requested the interrupt
*
* @return 1 if success 0 if failure
*/
int interrupt_wait(U32 * interrupt) {
int rc;
/*clear and reset interrupt structure*/
memset(&plx_intr, 0, sizeof (PLX_INTERRUPT));
/*set interrupt structure*/
plx_intr.LocalToPci = 1; //set bit 11
// plx_intr.PciMain = 1; // Bit 8 -- should already been on
/*enable interrupt on PLX bridge*/
rc = PlxPci_InterruptEnable(&fpga_dev, &plx_intr); // sets PCI9056_INT_CTRL_STAT
if (rc != ApiSuccess) PlxSdkErrorDisplay(rc);
/*register for interrupt with kernel*/
rc = PlxPci_NotificationRegisterFor(&fpga_dev, &plx_intr, &plx_event);
if (rc != ApiSuccess) PlxSdkErrorDisplay(rc);
/*wait for interrupt*/
int waitrc = PlxPci_NotificationWait(&fpga_dev, &plx_event, FPGA_TIMEOUT);
/*cancel interrupt notification*/
rc = PlxPci_NotificationCancel(&fpga_dev, &plx_event);
if (rc != ApiSuccess) PlxSdkErrorDisplay(rc);
/*disable interrupt*/
rc = PlxPci_InterruptDisable(&fpga_dev, &plx_intr); // sets PCI9056_INT_CTRL_STAT
if (rc != ApiSuccess) PlxSdkErrorDisplay(rc);
/*handle return code of wait function*/
if (waitrc == ApiWaitTimeout) {
*interrupt = TIMEOUT_INT;
return TRUE;
} else if (waitrc == ApiSuccess) {
*interrupt = INP_INT;
return TRUE;
} else if (waitrc == ApiWaitCanceled) {
record("Wait canceled\n");
return FALSE;
} else {
record("Wait returned an unknown value\n");
return FALSE;
}
}
void
InterruptTest(
PLX_DEVICE_OBJECT *pDevice
)
{
PLX_STATUS rc;
PLX_INTERRUPT PlxInterrupt;
PLX_NOTIFY_OBJECT NotifyObject;
Cons_printf(
"Description:\n"
" This sample demonstrates how to use the PLX API for\n"
" notification of the generic Local->PCI interrupts (e.g. LINTi#).\n"
" The interrupt trigger must be initiated by the\n"
" OEM hardware. PLX software is not able to manually\n"
" assert the interrupt since its source is OEM-dependent.\n"
"\n"
" Press any key to start...\n"
"\n"
);
Cons_getch();
Cons_printf(" Register for notification...... ");
// Clear interrupt fields
memset(&PlxInterrupt, 0, sizeof(PLX_INTERRUPT));
// Setup to wait for either generic interrupt
PlxInterrupt.LocalToPci = (1 << 0) | (1 << 1);
rc =
PlxPci_NotificationRegisterFor(
pDevice,
&PlxInterrupt,
&NotifyObject
);
if (rc != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(rc);
}
else
{
Cons_printf("Ok\n");
}
/***********************************************************
* This loop will loop only one time. It is provided here to
* demonstrate which code should be placed within the loop
* if waiting for the interrupt multiple times.
* Note that the generic L->P interrupt must constantly be
* re-enabled since the PLX driver will mask it.
**********************************************************/
do
{
Cons_printf(" Enable interrupt(s)............ ");
rc =
PlxPci_InterruptEnable(
pDevice,
&PlxInterrupt
);
if (rc != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(rc);
}
else
{
Cons_printf("Ok\n");
}
Cons_printf(
"\n"
" -- You may now trigger the interrupt --\n"
"\n"
);
Cons_printf(" Wait for interrupt event....... ");
rc =
PlxPci_NotificationWait(
pDevice,
&NotifyObject,
120 * 1000
);
switch (rc)
{
case ApiSuccess:
Cons_printf("Ok (Int received)\n");
/************************************************
*
* Custom code to clear the OEM source of the
* interrupt should be placed here. Another option
* is to modify the PLX driver interrupt handler
* to perform the souce clear. In that case, it
* will not constantly need to be masked/re-enabled.
*
***********************************************/
break;
case ApiWaitTimeout:
Cons_printf("*ERROR* - Timeout waiting for Int Event\n");
break;
case ApiWaitCanceled:
Cons_printf("*ERROR* - Interrupt event cancelled\n");
break;
default:
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(rc);
break;
}
Cons_printf(" Check notification status...... ");
rc =
PlxPci_NotificationStatus(
pDevice,
&NotifyObject,
&PlxInterrupt
);
if (rc == ApiSuccess)
{
Cons_printf("Ok (triggered ints:");
if (PlxInterrupt.LocalToPci & (1 << 0))
Cons_printf(" L->P 1");
if (PlxInterrupt.LocalToPci & (1 << 1))
Cons_printf(" L->P 2");
Cons_printf(")\n");
}
else
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(rc);
}
}
while (0);
// Release the interrupt wait object
Cons_printf(" Cancelling Int Notification.... ");
rc =
PlxPci_NotificationCancel(
pDevice,
&NotifyObject
);
if (rc != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(rc);
}
else
{
Cons_printf("Ok\n");
}
}
void
PerformDma_8000(
PLX_DEVICE_OBJECT *pDevice
)
{
U8 *VaBar0 = 0;
U8 DmaChannel;
U16 UserInput;
U32 LoopCount;
U32 PollCount;
U32 OffsetDmaCmd;
U32 ElapsedTime_ms;
VOID *BarVa;
double Stat_TxTotalCount;
double Stat_TxTotalBytes;
BOOLEAN bInterrupts;
PLX_STATUS status;
struct timeb StartTime, EndTime;
PLX_DMA_PROP DmaProp;
PLX_INTERRUPT PlxInterrupt;
PLX_DMA_PARAMS DmaParams;
PLX_PHYSICAL_MEM PciBuffer;
PLX_NOTIFY_OBJECT NotifyObject;
Cons_printf("\n\n");
Cons_printf("Please select a DMA channel (0-3) --> ");
Cons_scanf("%hd", &UserInput);
if (UserInput >= 4)
{
Cons_printf("ERROR: Unsupported DMA channel, test aborted\n");
return;
}
DmaChannel = (U8)UserInput;
// Set offset of DMA command register
OffsetDmaCmd = 0x200 + (DmaChannel * 0x100) + 0x38;
// Determine whether to use interrupts or polling
Cons_printf("Use interrupts(i) or poll(p) [i/p]? --> ");
UserInput = Cons_getch();
Cons_printf("%c\n\n", UserInput);
if (UserInput == 'i' || UserInput == 'I')
bInterrupts = TRUE;
else
bInterrupts = FALSE;
/**************************************************************
*
*************************************************************/
Cons_printf(" Allocate DMA buffer............ ");
// Set buffer request size
PciBuffer.Size = (8 * 1024 * 1024);
// Allocate a buffer
status =
PlxPci_PhysicalMemoryAllocate(
pDevice,
&PciBuffer,
TRUE // Smaller buffer ok
);
if (status != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
return;
}
Cons_printf("Ok (size=%d KB)\n", (PciBuffer.Size >> 10));
/**************************************************************
*
*************************************************************/
// Open the DMA channel
Cons_printf(" Open Channel %i for DMA......... ", DmaChannel);
status =
PlxPci_DmaChannelOpen(
pDevice,
DmaChannel,
NULL
);
if (status == ApiSuccess)
{
Cons_printf("Ok\n");
}
else
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
}
// Get current DMA properties
Cons_printf(" Get DMA propeties.............. ");
status =
PlxPci_DmaGetProperties(
pDevice,
DmaChannel,
&DmaProp
);
if (status != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
goto _ExitDmaTest;
}
Cons_printf("Ok\n");
// Update any DMA properties
Cons_printf(" Set DMA propeties.............. ");
// Set to support 128B TLP read request size
DmaProp.MaxSrcXferSize = PLX_DMA_MAX_SRC_TSIZE_128B;
status =
PlxPci_DmaSetProperties(
pDevice,
DmaChannel,
&DmaProp
);
if (status != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
goto _ExitDmaTest;
}
Cons_printf("Ok\n");
/**************************************************************
*
*************************************************************/
if (bInterrupts)
{
Cons_printf(" Register for notification...... ");
// Clear interrupt fields
memset( &PlxInterrupt, 0, sizeof(PLX_INTERRUPT) );
// Setup to wait for selected DMA channel
PlxInterrupt.DmaDone = (1 << DmaChannel);
status =
PlxPci_NotificationRegisterFor(
pDevice,
&PlxInterrupt,
&NotifyObject
);
if (status != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
return;
}
Cons_printf( "Ok\n" );
}
else
{
Cons_printf(" Map BAR 0 for register access.. ");
status =
PlxPci_PciBarMap(
pDevice,
0,
&BarVa
);
if (status != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
return;
}
Cons_printf("Ok (VA=%p)\n", BarVa);
VaBar0 = BarVa;
}
/*****************************************
*
* Transfer the Data
*
*****************************************/
Cons_printf("\n\n");
Cons_printf(" --- Performing DMA transfers (Press ESC to halt) ---\n");
// Clear DMA data
memset(&DmaParams, 0, sizeof(PLX_DMA_PARAMS));
DmaParams.AddrSource = PciBuffer.PhysicalAddr;
DmaParams.AddrDest = PciBuffer.PhysicalAddr + (PciBuffer.Size / 2);
DmaParams.ByteCount = PciBuffer.Size / 2;
// If polling, disable DMA interrupt
if (bInterrupts == FALSE)
DmaParams.bIgnoreBlockInt = TRUE;
LoopCount = 0;
// Reset stats
Stat_TxTotalCount = 0;
Stat_TxTotalBytes = 0;
// Get initial start time
ftime( &StartTime );
do
{
// Periodically display statistics
if ((LoopCount & 0x0000003F) == 0)
{
// Get end time
ftime( &EndTime );
// Calculate elapsed time in milliseconds
ElapsedTime_ms = (((U32)EndTime.time * 1000) + EndTime.millitm) -
(((U32)StartTime.time * 1000) + StartTime.millitm);
if (ElapsedTime_ms >= (UPDATE_DISPLAY_SEC * 1000))
{
// Display statistics
if (ElapsedTime_ms != 0)
{
Cons_printf(
" Transfers: %0.0lf Bytes: %0.2lf MB Time: %ldms Rate:%6.3lf MB/s\n",
Stat_TxTotalCount, Stat_TxTotalBytes / (1 << 20), ElapsedTime_ms,
((Stat_TxTotalBytes * 1000) / (double)ElapsedTime_ms) / (double)(1 << 20)
);
}
// Reset stats
Stat_TxTotalCount = 0;
Stat_TxTotalBytes = 0;
// Check for user cancel
if (Cons_kbhit())
{
if (Cons_getch() == 27)
goto _ExitDmaTest;
}
// Get new start time
ftime( &StartTime );
}
}
status =
PlxPci_DmaTransferBlock(
pDevice,
DmaChannel,
&DmaParams,
0 // Don't wait for completion
);
if (status != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
goto _ExitDmaTest;
}
if (bInterrupts)
{
status =
PlxPci_NotificationWait(
pDevice,
&NotifyObject,
DMA_TIMEOUT_SEC * 1000
);
switch (status)
{
case ApiSuccess:
break;
case ApiWaitTimeout:
Cons_printf("*ERROR* - Timeout waiting for Int Event\n");
goto _ExitDmaTest;
case ApiWaitCanceled:
Cons_printf("*ERROR* - Interrupt event cancelled\n");
goto _ExitDmaTest;
default:
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
goto _ExitDmaTest;
}
}
else
{
PollCount = 1000000;
// Poll for DMA completion
do
{
PollCount--;
if ((PlxReg(VaBar0, OffsetDmaCmd) & (1 << 30)) == 0)
break;
}
while (PollCount != 0);
// Check if DMA is truly complete
if (PollCount == 0)
{
Cons_printf("*ERROR* - Timeout waiting for DMA to complete\n");
goto _ExitDmaTest;
}
}
// Update statistics
Stat_TxTotalCount++;
Stat_TxTotalBytes += PciBuffer.Size / 2;
LoopCount++;
}
while (1);
_ExitDmaTest:
Cons_printf("\n ------------------\n");
// Release the interrupt wait object
if (bInterrupts)
{
Cons_printf(" Cancelling Int Notification.... ");
status =
PlxPci_NotificationCancel(
pDevice,
&NotifyObject
);
if (status != ApiSuccess)
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
}
else
{
Cons_printf("Ok\n");
}
}
// Close DMA Channel
Cons_printf(" Close DMA Channel.............. ");
status =
PlxPci_DmaChannelClose(
pDevice,
DmaChannel
);
if (status == ApiSuccess)
{
Cons_printf("Ok\n");
}
else
{
Cons_printf("*ERROR* - API failed\n");
PlxSdkErrorDisplay(status);
}
// Release DMA buffer
PlxPci_PhysicalMemoryFree(
pDevice,
&PciBuffer
);
}
/*
* Remove the slot (specified by h) from the system
*
* Includes unmapping the BAR
*/
static int _plx_remove_slot_from_map(unsigned long idx)
{
PLX_STATUS status;
unsigned long i;
/* If the handle is registered as a notifier
* then we need to unregister it to free up the event handle.
*/
if (V_MAP.registered[idx]) {
status = PlxPci_NotificationCancel(&(V_MAP.device[idx]),
&(V_MAP.events[idx]));
if (status != ApiSuccess) {
_plx_log_DEBUG("Error unregistering notification of PCI DMA channel");
_plx_print_more(status);
}
}
status = PlxPci_PciBarUnmap(&(V_MAP.device[idx]), (VOID**)&(V_MAP.addr[idx]));
if (status != ApiSuccess) {
_plx_log_DEBUG("Error unmapping HANDLE %p\n", &(V_MAP.device[idx]));
_plx_print_more(status);
return status;
}
V_MAP.n--;
/* Shrink the virtual map */
if (V_MAP.n > 0) {
for (i = idx; i < V_MAP.n; i++) {
V_MAP.addr[i] = V_MAP.addr[i + 1];
V_MAP.device[i] = V_MAP.device[i + 1];
V_MAP.events[i] = V_MAP.events[i + 1];
V_MAP.intrs[i] = V_MAP.intrs[i + 1];
}
status = _plx_resize_map();
if (status != PLX_SUCCESS) {
_plx_log_DEBUG("Error removing slot %d from V_MAP.\n", idx);
return status;
}
} else {
free(V_MAP.addr);
free(V_MAP.device);
free(V_MAP.events);
free(V_MAP.intrs);
free(V_MAP.registered);
V_MAP.addr = NULL;
V_MAP.device = NULL;
V_MAP.events = NULL;
V_MAP.intrs = NULL;
V_MAP.registered = NULL;
}
return PLX_SUCCESS;
}
