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* [dpdk-dev] Issue with VFIO/IOMMU
@ 2020-09-03 11:09 Vikas Gupta
  2020-09-04 13:50 ` Burakov, Anatoly
  0 siblings, 1 reply; 4+ messages in thread
From: Vikas Gupta @ 2020-09-03 11:09 UTC (permalink / raw)
  To: dev; +Cc: Ajit Kumar Khaparde, Vikram Prakash


  I observe an issue with IOVA address returned by api
rte_memzone_reserve_aligned (flags= RTE_MEMZONE_IOVA_CONTIG) used for queue
memory allocation. With high level debugging, I notice that IOVA address
returned in mz->iova is not mapped by VFIO_IOMMU_MAP_DMA so in turn SMMU
exception is seen.

*Details for the setup*

Platform: Armv8 (Broadcom Stingray)

DPDK release: DPDK 20.08 <http://fast.dpdk.org/rel/dpdk-20.08.tar.xz>

PMD patch:


dpdk-test is launched using below command

*dpdk-test --vdev <cryptopmd_name> -w 0000:00:00.0 --iova-mode pa *

The test suite is launched over dpdk-test application command prompt using
command ‘cryptodev_<cryptopmd_name>_autotest’

The issue is seen when several iterations of above test_suite is executed
which in turn do multiple calls to rte_memzone_reserve_aligned,
rte_mempool_create and rte_memzone_free, rte_mempool_free.

 Function *vfio_type1_dma_mem_map* with map/unmap event is executed several
times during test_suite run.

Any inputs would be helpful.



^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2020-09-07 15:43 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2020-09-03 11:09 [dpdk-dev] Issue with VFIO/IOMMU Vikas Gupta
2020-09-04 13:50 ` Burakov, Anatoly
2020-09-07 13:31   ` Vikas Gupta
2020-09-07 15:43     ` Burakov, Anatoly

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