This series of patches will add command descriptor support to read/write crypto engine register via BAM/DMA We need this support because if there is multiple EE's (Execution Environment) accessing the same CE then there will be race condition. To avoid this race condition BAM HW hsving LOC/UNLOCK feature on BAM pipes and this LOCK/UNLOCK will be set via command descriptor only. Since each EE's having their dedicated BAM pipe, BAM allows Locking and Unlocking on BAM pipe. So if one EE's requesting for CE5 access then that EE's first has to LOCK the BAM pipe while setting LOCK bit on command descriptor and then access it. After finishing the request EE's has to UNLOCK the BAM pipe so in this way we race condition will not happen. tested with "tcrypt.ko" and "kcapi" tool. Need help to test these all the patches on msm platform v2: * Addressed all the comments from v1 * Added the dt-binding * Added locking/unlocking mechanism in bam driver v1: * https://lore.kernel.org/lkml/20231214114239.2635325-1-quic_mdalam@xxxxxxxxxxx/ * Initial set of patches for cmd descriptor support Md Sadre Alam (16): dt-bindings: dma: qcom,bam: Add bam pipe lock dmaengine: qcom: bam_dma: add bam_pipe_lock dt property dmaengine: qcom: bam_dma: add LOCK & UNLOCK flag support crypto: qce - Add support for crypto address read crypto: qce - Add bam dma support for crypto register r/w crypto: qce - Convert register r/w for skcipher via BAM/DMA crypto: qce - Convert register r/w for sha via BAM/DMA crypto: qce - Convert register r/w for aead via BAM/DMA crypto: qce - Add LOCK and UNLOCK flag support crypto: qce - Add support for lock aquire,lock release api. crypto: qce - Add support for lock/unlock in skcipher crypto: qce - Add support for lock/unlock in sha crypto: qce - Add support for lock/unlock in aead arm64: dts: qcom: ipq9574: enable bam pipe locking/unlocking arm64: dts: qcom: ipq8074: enable bam pipe locking/unlocking arm64: dts: qcom: ipq6018: enable bam pipe locking/unlocking .../devicetree/bindings/dma/qcom,bam-dma.yaml | 8 + arch/arm64/boot/dts/qcom/ipq6018.dtsi | 1 + arch/arm64/boot/dts/qcom/ipq8074.dtsi | 1 + arch/arm64/boot/dts/qcom/ipq9574.dtsi | 1 + drivers/crypto/qce/aead.c | 4 + drivers/crypto/qce/common.c | 142 +++++++---- drivers/crypto/qce/core.c | 13 +- drivers/crypto/qce/core.h | 12 + drivers/crypto/qce/dma.c | 232 ++++++++++++++++++ drivers/crypto/qce/dma.h | 26 +- drivers/crypto/qce/sha.c | 4 + drivers/crypto/qce/skcipher.c | 4 + drivers/dma/qcom/bam_dma.c | 14 +- include/linux/dmaengine.h | 6 + 14 files changed, 424 insertions(+), 44 deletions(-) -- 2.34.1
