This set fixes the issues related with the dm-crypt + QAT driver use-case. The first patch fixes a potential dead-lock that might occur when using dm-crypt + QAT in out of memory conditions. The datapaths of the aead and skcipher implementations have been changed to use pre-allocated buffers that are part of the request contexts. The also removes the CRYPTO_ALG_ALLOCATES_MEMORY flag from the aead and skcipher implementations. The second patch refactors the submission logic in preparation for the introduction of a backlog queue to handle crypto requests with the CRYPTO_TFM_REQ_MAY_BACKLOG flag set. The third patch addresses a stall in the dm-crypt + QAT usecase by adding support for the CRYPTO_TFM_REQ_MAY_BACKLOG flag. If the HW queue is full, the driver enqueues the request in a list and resubmit it at a later time, avoiding losing it. The last, re-enables the crypto instances in the QAT driver which were disabled due to the issues above. Changes from v1: - Patch #3: removed worqueues. Requests in the backlog queue are now resubmitted in the context of the callback of a previously submitted request. This reduces the CPU utilization as the resubmit backlog function always finds a free slot in the HW queues when resubmits a job. Giovanni Cabiddu (4): crypto: qat - use pre-allocated buffers in datapath crypto: qat - refactor submission logic crypto: qat - add backlog mechanism crypto: qat - re-enable registration of algorithms drivers/crypto/qat/qat_4xxx/adf_drv.c | 7 - drivers/crypto/qat/qat_common/Makefile | 1 + drivers/crypto/qat/qat_common/adf_transport.c | 11 ++ drivers/crypto/qat/qat_common/adf_transport.h | 1 + .../qat/qat_common/adf_transport_internal.h | 1 + drivers/crypto/qat/qat_common/qat_algs.c | 150 ++++++++++-------- drivers/crypto/qat/qat_common/qat_algs_send.c | 84 ++++++++++ drivers/crypto/qat/qat_common/qat_algs_send.h | 11 ++ drivers/crypto/qat/qat_common/qat_asym_algs.c | 56 ++++--- drivers/crypto/qat/qat_common/qat_crypto.c | 10 +- drivers/crypto/qat/qat_common/qat_crypto.h | 39 +++++ 11 files changed, 269 insertions(+), 102 deletions(-) create mode 100644 drivers/crypto/qat/qat_common/qat_algs_send.c create mode 100644 drivers/crypto/qat/qat_common/qat_algs_send.h -- 2.35.1
