TMS320C6674: PCIE EP remote configuration does not work

Hi,

Which software is this?

Best Regards,
Yordan

Hi Yordan,

i used first the lld functions of pdk_C6678_1_1_2_5, but in my test i use only bare metal code as


volatile uint32_t *pPcieConfigCFG = (volatile uint32_t *) 0x21800008;
*pPcieConfigCFG = func | dev <<8 |bus <<16|type<<24;
volatile uint32_t *pPcieConfigSpace = (volatile uint32_t *)0x21802000;
uint32_t venDevId = pPcieConfigSpace[0];
uint32_t revId =pPcieConfigSpace[2];

Best regards, Andreas

Hi,

I've notified the RTOS team. Their feedback will be posted here.

Best Regards,
Yordan

Hi,

"type<<24"=====> did you tried either this to "0" for type 0 access or "1" for type "1" access?

Regards, Eric

Hi Eric,
i expected to use 1 but i tried both - its the same behaviour.


i loop over bus, device and function:

for(int bus =0;bus < 1<<8;++bus){
for (int dev=0;dev<1<<5;++dev){
for (int func=0;func<1<<3;++func){

const int type= 1;
volatile uint32_t *pPcieConfigCFG = (volatile uint32_t *) 0x21800008;
*pPcieConfigCFG = func | dev << 8 | bus << 16 | type << 24;
volatile uint32_t *pPcieConfigSpace = (volatile uint32_t *) 0x21802000;
uint32_t venDevId = pPcieConfigSpace[0];
uint32_t revId =pPcieConfigSpace[2];
(... printfs..when data changes)
}
}
}

typically I got back values like this:

pcieFindDevices bus = 0, dev = 0 revId =0x0, vndDevId = 0x8
pcieFindDevices bus = 0, dev = 1 revId =0x1, vndDevId = 0x8
pcieFindDevices bus = 0, dev = 2 revId =0x2, vndDevId = 0x8
pcieFindDevices bus = 0, dev = 2 revId =0x2, vndDevId = 0x8
pcieFindDevices bus = 0, dev = 3 revId =0x3, vndDevId = 0x8
pcieFindDevices bus = 0, dev = 4 revId =0x4, vndDevId = 0x8
pcieFindDevices bus = 0, dev = 5 revId =0x5, vndDevId = 0x8
pcieFindDevices bus = 0, dev = 5 revId =0x5, vndDevId = 0x0
pcieFindDevices bus = 0, dev = 5 revId =0x5, vndDevId = 0x8
pcieFindDevices bus = 0, dev = 6 revId =0x6, vndDevId = 0x8
....

Regards Andreas

Hi,

From processors.wiki.ti.com/.../PCI_Express_(PCIe)_Resource_Wiki_for_Keystone_Devices,
If C66x device is configured as RC, then CFG_SETUP register is used to specify the target bus/device/function numbers for the target device (switch/EP) and try to read/write the remote device space in MMR (from offset 0x2000 in PCIe MMR space) to generate those configuration requests. This CFG_SETUP only works in RC mode.

Regards, Eric