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Thu, 15 Aug 2024 08:57:29 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTPS id 40xkmhenmn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 15 Aug 2024 08:57:29 +0000 Received: from APBLRPPMTA02.qualcomm.com (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 47F8vSF4029646; Thu, 15 Aug 2024 08:57:28 GMT Received: from hu-devc-blr-u22-a.qualcomm.com (hu-mdalam-blr.qualcomm.com [10.131.36.157]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTPS id 47F8vSe4029644 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 15 Aug 2024 08:57:28 +0000 Received: by hu-devc-blr-u22-a.qualcomm.com (Postfix, from userid 466583) id 932D3411EE; Thu, 15 Aug 2024 14:27:27 +0530 (+0530) From: Md Sadre Alam To: vkoul@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andersson@kernel.org, konradybcio@kernel.org, thara.gopinath@gmail.com, herbert@gondor.apana.org.au, davem@davemloft.net, gustavoars@kernel.org, u.kleine-koenig@pengutronix.de, kees@kernel.org, agross@kernel.org, linux-arm-msm@vger.kernel.org, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org Cc: quic_srichara@quicinc.com, quic_varada@quicinc.com, quic_mdalam@quicinc.com, quic_utiwari@quicinc.com Subject: [PATCH v2 02/16] dmaengine: qcom: bam_dma: add bam_pipe_lock dt property Date: Thu, 15 Aug 2024 14:27:11 +0530 Message-Id: <20240815085725.2740390-3-quic_mdalam@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240815085725.2740390-1-quic_mdalam@quicinc.com> References: <20240815085725.2740390-1-quic_mdalam@quicinc.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: CkHHe18vFuWjsd4YAquZKZTbAof_vVln X-Proofpoint-ORIG-GUID: CkHHe18vFuWjsd4YAquZKZTbAof_vVln X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-15_01,2024-08-13_02,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 malwarescore=0 impostorscore=0 mlxscore=0 lowpriorityscore=0 spamscore=0 suspectscore=0 bulkscore=0 clxscore=1011 phishscore=0 priorityscore=1501 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2408150064 bam having locking and unlocking mechanism of bam pipes. Upon encountering a descriptor with Lock bit set, the BAM will lock all other pipes not related to the current pipe group, and keep handling the current pipe only until it sees the Un-Lock set , then it will release all locked pipes. The actual locking is done on the new descriptor fetching for publishing, i.e. locked pipe will not fetch new descriptors even if it got event/events adding more descriptors for this pipe. Adding the bam_pipe_lock flag in bam driver to handle Lock and Un-Lock bit set on command descriptor. Signed-off-by: Md Sadre Alam --- Change in [v2] * Added bam_pipe_lock dt property Change in [v1] * This patch was not included in [v1] drivers/dma/qcom/bam_dma.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c index 5e7d332731e0..1ac7e250bdaa 100644 --- a/drivers/dma/qcom/bam_dma.c +++ b/drivers/dma/qcom/bam_dma.c @@ -389,6 +389,7 @@ struct bam_device { u32 ee; bool controlled_remotely; bool powered_remotely; + bool bam_pipe_lock; u32 active_channels; const struct reg_offset_data *layout; @@ -1272,6 +1273,9 @@ static int bam_dma_probe(struct platform_device *pdev) bdev->powered_remotely = of_property_read_bool(pdev->dev.of_node, "qcom,powered-remotely"); + bdev->bam_pipe_lock = of_property_read_bool(pdev->dev.of_node, + "qcom,bam_pipe_lock"); + if (bdev->controlled_remotely || bdev->powered_remotely) bdev->bamclk = devm_clk_get_optional(bdev->dev, "bam_clk"); else