extend PCIe interrupt with Qsys

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Hello,

My question is : How can I use Qsys to implement a mechanism that will produce interrupts that the driver will be able to recognize? What components and with what connections should I use?

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1) Read the PCIe user guide.

2) Look at some example designs.

3) Modify and example design to do what you want.

There are quite a few threads about the PCIe interface here (try the IP section).

Nial.

I have read the PCIe user guide and I found that the signal app_msi_req produces the interrupts to pci express.

Also I check the followed registers that are responsible for generating msi interrupts:

1. Set the MSI Enable at bit[0] of MSI Control Status register, this bit is mapped to bit[16] of configuration space register offset 0x50.

2. Set the Interrupt Disable at bit[10] of Command Register at configuration space offset register 0x4 to disable legacy interrupt.

3. Set the Bus Master at bit[2] of Command Register at configuration space offset register 0x4 to enable the ability to generate MSI message.

Every 1 sec I enable the app_msi_req inorder to see every 1 sec interrupts in my driver.

app _msi_tc and app_msi_num assigned to zero.

Still I can not see interrupts in my driver. The interrupt handler is not called.

I would like to ask:

1) What should I check more? Do I miss something important?

2) How can I simulate this desing to check if I get app_msi_ack=1 ??

3) Should I change more signals?

Thanks in Advance!

I have asserted RxmIrq and app_msi_req signals (Signals that are responsible for Interrupts as it's said in the IP compiler user Guide) every 100 cylces.

In simulation, I saw that it is asserted app_int_ack every time that RxmIrq and app_msi_req are asserted. BUT NOT app_msi_ack is turn to 1.

I guess that this is happend because of the configuration of the testbence ( INTx is enabled instead of MSI).

Nevertheless I can not see interrupts from the side of the software.

Any advices ?

Do I miss something important?

How can I set the simulation from INT to msi mode?

Thanks you.

Also I want to ask : why there are some signals that are terminated.??

some signals are :

.aer_msi_num (5'b00000), // (terminated)

.app_int_sts (1'b0), // (terminated)

.app_msi_num (5'b00000), // (terminated)

.app_msi_req (1'b0), // (terminated)

.app_msi_tc (3'b000), // (terminated)

is there any reason that are terminated?

I'm sorry Toniss, I was being facetious as I thought you were looking for someone to do what you wanted without putting

any work in, this is obviously not the case.

Good luck, there are a lot of gaps in the PCIe implementation/ tools / documentation.

Nial.