Comments (2)
hmaarrfk
commented on July 29, 2024
So I'm not too exactly how to recreate it, but basically you can try to mess with the driver a little bit, by trying to repeatidly add a queue that has already been added
Running
dmactl qdma01000 q add idx 0 dir h2c idx_ringsz 5
dmactl qdma01000 q start idx 0 dir h2c idx_ringsz 5
dmactl qdma01000 q add idx 0 dir h2c idx_ringsz 5
dmactl qdma01000 q start idx 0 dir h2c idx_ringsz 5
dmactl qdma01000 q stop idx 0 dir h2c idx_ringsz 5
dmactl qdma01000 q add idx 0 dir h2c idx_ringsz 5
dmactl qdma01000 q start idx 0 dir h2c idx_ringsz 5
dmactl qdma01000 q stop idx 0 dir h2c idx_ringsz 5
dmactl qdma01000 q del idx 0 dir h2c idx_ringsz 5
A few times you get
[ 114.054856] qdma:qdma_queue_add: descq idx 0 already added.
[ 114.054859] qdma:xnl_q_add: xpdev_queue_add() failed: -12
[ 114.056097] qdma:qdma_queue_reconfig: qdma01000-MM-0 invalid state, q_state 2.
[ 114.056099] qdma:xnl_q_start: qdma_queue_reconfig() failed: -8
[ 114.058385] qdma:qdma_queue_add: descq idx 0 already added.
[ 114.058389] qdma:xnl_q_add: xpdev_queue_add() failed: -12
[ 123.732637] qdma:qdma_queue_add: descq idx 0 already added.
[ 123.732641] qdma:xnl_q_add: xpdev_queue_add() failed: -12
[ 123.734470] qdma:qdma_queue_reconfig: qdma01000-MM-0 invalid state, q_state 2.
[ 123.734473] qdma:xnl_q_start: qdma_queue_reconfig() failed: -8
[ 123.737047] qdma:qdma_queue_add: descq idx 0 already added.
[ 123.737049] qdma:xnl_q_add: xpdev_queue_add() failed: -12
[ 131.492421] qdma:qdma_queue_add: descq idx 0 already added.
[ 131.492424] qdma:xnl_q_add: xpdev_queue_add() failed: -12
[ 131.494234] qdma:qdma_queue_reconfig: qdma01000-MM-0 invalid state, q_state 2.
[ 131.494237] qdma:xnl_q_start: qdma_queue_reconfig() failed: -8
[ 131.496782] qdma:qdma_queue_add: descq idx 0 already added.
[ 131.496785] qdma:xnl_q_add: xpdev_queue_add() failed: -12
[ 150.450714] qdma:qdma_queue_add: descq idx 0 already added.
[ 150.450716] qdma:xnl_q_add: xpdev_queue_add() failed: -12
[ 150.456352] qdma:qdma_queue_reconfig: qdma01000-MM-0 invalid state, q_state 2.
[ 150.456353] qdma:xnl_q_start: qdma_queue_reconfig() failed: -8
[ 150.463805] qdma:qdma_queue_add: descq idx 0 already added.
[ 150.463808] qdma:xnl_q_add: xpdev_queue_add() failed: -12
[ 150.469872] qdma:qdma_queue_reconfig: qdma01000-MM-0 invalid state, q_state 2.
[ 150.469874] qdma:xnl_q_start: qdma_queue_reconfig() failed: -8
[ 150.483322] qdma:qdma_queue_add: descq idx 0 already added.
[ 150.483326] qdma:xnl_q_add: xpdev_queue_add() failed: -12
Then dma util will hang
$ sudo ./dmautils -c config/dmautils_config/mm-bi/mm_1_1/bi_mm_1_1_64
[sudo] password for mark:
dmactl qdma01000 q add idx 0 mode mm dir h2c
qdma01000-MM-0 H2C added.
Added 1 Queues.
dmactl qdma01000 q start idx 0 dir h2c idx_ringsz 5
1 Queues started, idx 0 ~ 0.
dmactl qdma01000 q add idx 0 mode mm dir c2h
q idx 0 already added.
dmactl qdma01000 q start idx 0 dir c2h idx_ringsz 5
qdma01000-MM-0 invalid state, q_state 2.
dmautils(16) threads
dmactl qdma01000 q stop idx 0 dir h2c
dmactl qdma01000 q stop idx 0 dir h2c
Stopped Queues 0 -> 0.
queue qdma01000-MM-0, idx 0 stop failed.
qdma01000, 01:00.00, bar#2, reg 0x8 -> 0x240000, read back 0x104.
qdma01000, 01:00.00, bar#2, reg 0x8 -> 0x240000, read back 0x104.
and the following dmesgs have been added to the kernel log
[ 156.876911] qdma:qdma_queue_add: descq idx 0 already added.
[ 156.876914] qdma:xnl_q_add: xpdev_queue_add() failed: -12
[ 156.879239] qdma:qdma_queue_reconfig: qdma01000-MM-0 invalid state, q_state 2.
[ 156.879241] qdma:xnl_q_start: qdma_queue_reconfig() failed: -8
[ 186.977445] qdma:qdma_queue_stop: qdma01000-MM-0 invalid state, q_state 1.
It seems logical that the kernel logic should tell the user program that it asked for something unreasonable, and keep going with the status quo, instead of putting itself in an invalid state (and hanging the QDMA driver).
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sujathabanoth-xlnx
commented on July 29, 2024
Issue is addressed in latest driver driver, Hence closing it.
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