how to change 'priority 'of SRIO message packet , why the 'prio' of sent packet is 0'b11

thanks

Rajasekaran K

information needed are as follows

1, TMS320C6678

2, mcsdk_2_01_02_06

3, Custom Board

By the way , I have solved this problem.

by modifying the driver code as following mentioned.

in c:\ti\pdk_c6678_1_1_2_6\packages\ti\drv\srio\src\srio_drv.c

line 1747:

{

       txCfg.priority = 0;

}

I modified this to : txCfg.priority = 3;

It corresponding to RIO_TX_QUEUE_SCH_INFO.

txCfg.priority = 0     corresponds RIO_TX_QUEUE_SCH_INFO.prio    3

txCfg.priority = 1     corresponds RIO_TX_QUEUE_SCH_INFO.prio   2

txCfg.priority = 2     corresponds RIO_TX_QUEUE_SCH_INFO.prio    1

txCfg.priority = 3     corresponds RIO_TX_QUEUE_SCH_INFO.prio    0

hardware accomplishes the translation.

I wonder why srio driver develop set this as 0. the RIO_TX_QUEUE_SCH_INFO.prio is   3, which indicates the "prio" of packet is 0'b11, however the rapidio specification says that "priority of request packet should be 0~2, response packet priority should be request priority +1".

I think it is a bug!

Srio module of 6678 can receive message with prio 3. FPGA can also receive any packet without checking the prio bit, even if prio is 3 .but controller of PowerPC from Freescale performs strict checking . request packet with prio 3 can lead powerPC enters into a port-write error!

error code is : illegal transaction decode. in the ERR_DET register.

another way to solve this problem is to use SRIO_socket in raw mode ,instead of normal mode, you should set bAppManagedConfig=1, cfg.u.appManagedCfg.srioPktDmaTxPrio = Srio_PktDma_Prio_Low; //Srio_PktDma_Prio_Low is 3

and manually set queue number,which can't generate interrupt. you can only polling the receiving queue .  It is said in example project"SRIO_LoopbackTestProject".

many thanks