crypto: qat - re-enable sriov after pf reset

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When a Physical Function (PF) is reset, SR-IOV gets disabled, making the
associated Virtual Functions (VFs) unavailable. Even after reset and
using pci_restore_state, VFs remain uncreated because the numvfs still
at 0. Therefore, it's necessary to reconfigure SR-IOV to re-enable VFs.

This commit introduces the ADF_SRIOV_ENABLED configuration flag to cache
the SR-IOV enablement state. SR-IOV is only re-enabled if it was
previously configured.

This commit also introduces a dedicated workqueue without
`WQ_MEM_RECLAIM` flag for enabling SR-IOV during Heartbeat and CPM error
resets, preventing workqueue flushing warning.

This patch is based on earlier work done by Shashank Gupta.

Signed-off-by: Mun Chun Yep <mun.chun.yep@intel.com>
Reviewed-by: Ahsan Atta <ahsan.atta@intel.com>
Reviewed-by: Markas Rapoportas <markas.rapoportas@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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This commit is contained in:

Mun Chun Yep 2024-02-02 18:53:20 +08:00 • committed by Herbert Xu

parent ec26f8e6c7

commit 4469f9b234

4 changed files with 79 additions and 4 deletions

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40

drivers/crypto/intel/qat/qat_common/adf_aer.c

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1

drivers/crypto/intel/qat/qat_common/adf_cfg_strings.h

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5

drivers/crypto/intel/qat/qat_common/adf_common_drv.h

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37

drivers/crypto/intel/qat/qat_common/adf_sriov.c

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