PCIe interrupt problem

Charis Lee

Dear support,

I hope I can receive help from you one more time. Our hardware is based on the TCI6638 chip and I have one problem,i set the xtcievmk2x board as PCIe boot mode(C66x is Boot Master as EP).After power on,both legacy interrupt and MSI interrupt are enabled.

How can I configure only enable one.

over 9 years ago

0 Raja over 9 years ago

TI__Guru* 81335 points

Hi Chris,
Could you please elaboarte your query?
Thank you.

0 Charis Lee over 9 years ago in reply to Raja

Intellectual 340 points

Hi, Thank you for your reply!
The xtcievmk2x board is set to PCIe boot mode(C66x is Boot Master as EP).After power on,the RC Can enumerate 6638.Below is the relevant register value
MSI_CAP (addr:0x21801050) value:0x00817005
MSI0_IRQ_ENABLE_SET(addr:0x21800108) value: 0x1
LEGACY_A_IRQ_ENABLE_SET(addr:0x21800188)value:0x1
LEGACY_B_IRQ_ENABLE_SET(addr:0x21800198)value:0x1
LEGACY_C_IRQ_ENABLE_SET(addr:0x218001A8)value:0x1
LEGACY_D_IRQ_ENABLE_SET(addr:0x218001B8)value:0x1
Follow the steps at 2.14.2.1 Legacy Interrupt Generation in EP Mode,my code is
*(unsigned int *)0x21800064 = 0x1;But the RC device not receives interrupt.
Thanks!

0 Ganapathi Dhandapani95 over 9 years ago

TI__Mastermind 28085 points

I will check with my team and get back to you.

0 Charis Lee over 9 years ago in reply to Ganapathi Dhandapani95

Intellectual 340 points

Looking forward to your reply!

Thanks!

0 Charis Lee over 9 years ago in reply to Ganapathi Dhandapani95

Intellectual 340 points

Hi,Ganapathi Dhandapani:
Thank you for your help! It is my fault,I find the INTX_DIS (bit10) in STATUS_COMMAND register (0x21801004) is set to disable the Legacy interrupt,so the EP can not generate an interrupt.I can't change the registers values before the enumeration ,so I decided to switch to the MSI interrupt!
Thanks!

0 Ganapathi Dhandapani95 over 9 years ago in reply to Charis Lee

TI__Mastermind 28085 points

Thanks for your update.

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PCIe interrupt problem