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Mon, 17 Apr 2023 17:44:25 GMT Received: from car-linux11.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Mon, 17 Apr 2023 10:44:25 -0700 From: Nikunj Kela To: CC: , , , , , , Nikunj Kela Subject: [PATCH v3 2/2] firmware: arm_scmi: Augment SMC/HVC to allow optional parameter Date: Mon, 17 Apr 2023 10:44:01 -0700 Message-ID: <20230417174401.19563-3-quic_nkela@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230417174401.19563-1-quic_nkela@quicinc.com> References: <20230409181918.29270-1-quic_nkela@quicinc.com> <20230417174401.19563-1-quic_nkela@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: UeGa0hdIGULXbpgb_RwmpPAi-ttTSLct X-Proofpoint-GUID: UeGa0hdIGULXbpgb_RwmpPAi-ttTSLct X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-17_11,2023-04-17_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 impostorscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 clxscore=1015 malwarescore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304170156 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230417_104433_040284_16DAE3E1 X-CRM114-Status: GOOD ( 24.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch add support for passing shmem channel address as parameter in smc/hvc call. This patch is useful when multiple scmi instances are using same smc-id and firmware needs to distiguish among the instances. Signed-off-by: Nikunj Kela --- drivers/firmware/arm_scmi/driver.c | 1 + drivers/firmware/arm_scmi/smc.c | 25 ++++++++++++++++++++++++- 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index e7d97b59963b..b5957cc12fee 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -2914,6 +2914,7 @@ static const struct of_device_id scmi_of_match[] = { #endif #ifdef CONFIG_ARM_SCMI_TRANSPORT_SMC { .compatible = "arm,scmi-smc", .data = &scmi_smc_desc}, + { .compatible = "arm,scmi-smc-param", .data = &scmi_smc_desc}, #endif #ifdef CONFIG_ARM_SCMI_TRANSPORT_VIRTIO { .compatible = "arm,scmi-virtio", .data = &scmi_virtio_desc}, diff --git a/drivers/firmware/arm_scmi/smc.c b/drivers/firmware/arm_scmi/smc.c index 93272e4bbd12..e28387346d33 100644 --- a/drivers/firmware/arm_scmi/smc.c +++ b/drivers/firmware/arm_scmi/smc.c @@ -20,6 +20,9 @@ #include "common.h" +#define lower32(x) ((u32)((x) & 0xffffffff)) +#define upper32(x) ((u32)(((u64)(x) >> 32) & 0xffffffff)) + /** * struct scmi_smc - Structure representing a SCMI smc transport * @@ -30,6 +33,8 @@ * @inflight: Atomic flag to protect access to Tx/Rx shared memory area. * Used when operating in atomic mode. * @func_id: smc/hvc call function id + * @is_smc64: smc/hvc calling convention type 64 vs 32 + * @param: physical address of the shmem channel */ struct scmi_smc { @@ -40,6 +45,8 @@ struct scmi_smc { #define INFLIGHT_NONE MSG_TOKEN_MAX atomic_t inflight; u32 func_id; + bool is_smc64; + phys_addr_t param; }; static irqreturn_t smc_msg_done_isr(int irq, void *data) @@ -137,6 +144,8 @@ static int smc_chan_setup(struct scmi_chan_info *cinfo, struct device *dev, if (ret < 0) return ret; + if (of_device_is_compatible(dev->of_node, "arm,scmi-smc-param")) + scmi_info->param = res.start; /* * If there is an interrupt named "a2p", then the service and * completion of a message is signaled by an interrupt rather than by @@ -156,6 +165,7 @@ static int smc_chan_setup(struct scmi_chan_info *cinfo, struct device *dev, } scmi_info->func_id = func_id; + scmi_info->is_smc64 = ARM_SMCCC_IS_64(func_id); scmi_info->cinfo = cinfo; smc_channel_lock_init(scmi_info); cinfo->transport_info = scmi_info; @@ -188,7 +198,20 @@ static int smc_send_message(struct scmi_chan_info *cinfo, shmem_tx_prepare(scmi_info->shmem, xfer, cinfo); - arm_smccc_1_1_invoke(scmi_info->func_id, 0, 0, 0, 0, 0, 0, 0, &res); +#ifdef CONFIG_ARM64 + /* + * if SMC32 convention is used, pass 64 bit address in + * two parameters + */ + if (!scmi_info->is_smc64) + arm_smccc_1_1_invoke(scmi_info->func_id, + lower32(scmi_info->param), + upper32(scmi_info->param), + 0, 0, 0, 0, 0, &res); + else +#endif + arm_smccc_1_1_invoke(scmi_info->func_id, scmi_info->param, + 0, 0, 0, 0, 0, 0, &res); /* Only SMCCC_RET_NOT_SUPPORTED is valid error code */ if (res.a0) {