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Fri, 15 Nov 2024 01:15:41 GMT Received: from hu-sibis-blr.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Thu, 14 Nov 2024 17:15:37 -0800 From: Sibi Sankar To: , , , CC: , , , , , , , Amir Vajid Subject: [PATCH V5 2/2] firmware: arm_scmi: vendors: Add QCOM SCMI Generic Extensions Date: Fri, 15 Nov 2024 06:45:15 +0530 Message-ID: <20241115011515.1313447-3-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241115011515.1313447-1-quic_sibis@quicinc.com> References: <20241115011515.1313447-1-quic_sibis@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: Oz3U6D54__IsiiTY_ukFRP7zEVvWbH05 X-Proofpoint-ORIG-GUID: Oz3U6D54__IsiiTY_ukFRP7zEVvWbH05 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 phishscore=0 malwarescore=0 lowpriorityscore=0 mlxscore=0 mlxlogscore=999 impostorscore=0 bulkscore=0 adultscore=0 suspectscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2411150009 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241114_171547_874481_0F268FDB X-CRM114-Status: GOOD ( 23.72 ) 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 The QCOM SCMI Generic Extensions Protocol provides a generic way of exposing a number of Qualcomm SoC specific features (like memory bus scaling) through a mixture of pre-determined algorithm strings and param_id pairs hosted on the SCMI controller. Co-developed-by: Shivnandan Kumar Signed-off-by: Shivnandan Kumar Co-developed-by: Ramakrishna Gottimukkula Signed-off-by: Ramakrishna Gottimukkula Co-developed-by: Amir Vajid Signed-off-by: Amir Vajid Signed-off-by: Sibi Sankar Reviewed-by: Cristian Marussi --- v4: * Splitting the series into vendor protocol and memlat client. Also the move the memlat client implementation back to RFC due to multiple opens. * Use common xfer helper to avoid code duplication [Dmitry] * Update enum documentation without duplicate enum info [Dmitry] drivers/firmware/arm_scmi/Kconfig | 1 + drivers/firmware/arm_scmi/Makefile | 1 + .../firmware/arm_scmi/vendors/qcom/Kconfig | 15 ++ .../firmware/arm_scmi/vendors/qcom/Makefile | 2 + .../arm_scmi/vendors/qcom/qcom-generic-ext.c | 139 ++++++++++++++++++ include/linux/scmi_qcom_protocol.h | 37 +++++ 6 files changed, 195 insertions(+) create mode 100644 drivers/firmware/arm_scmi/vendors/qcom/Kconfig create mode 100644 drivers/firmware/arm_scmi/vendors/qcom/Makefile create mode 100644 drivers/firmware/arm_scmi/vendors/qcom/qcom-generic-ext.c create mode 100644 include/linux/scmi_qcom_protocol.h diff --git a/drivers/firmware/arm_scmi/Kconfig b/drivers/firmware/arm_scmi/Kconfig index dabd874641d0..73128442d97b 100644 --- a/drivers/firmware/arm_scmi/Kconfig +++ b/drivers/firmware/arm_scmi/Kconfig @@ -71,6 +71,7 @@ config ARM_SCMI_DEBUG_COUNTERS source "drivers/firmware/arm_scmi/transports/Kconfig" source "drivers/firmware/arm_scmi/vendors/imx/Kconfig" +source "drivers/firmware/arm_scmi/vendors/qcom/Kconfig" endif #ARM_SCMI_PROTOCOL diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile index 9ac81adff567..58cf4d656cbb 100644 --- a/drivers/firmware/arm_scmi/Makefile +++ b/drivers/firmware/arm_scmi/Makefile @@ -12,6 +12,7 @@ scmi-module-objs := $(scmi-driver-y) $(scmi-protocols-y) $(scmi-transport-y) obj-$(CONFIG_ARM_SCMI_PROTOCOL) += transports/ obj-$(CONFIG_ARM_SCMI_PROTOCOL) += vendors/imx/ +obj-$(CONFIG_ARM_SCMI_PROTOCOL) += vendors/qcom/ obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-core.o obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-module.o diff --git a/drivers/firmware/arm_scmi/vendors/qcom/Kconfig b/drivers/firmware/arm_scmi/vendors/qcom/Kconfig new file mode 100644 index 000000000000..5dd9e8a6b75f --- /dev/null +++ b/drivers/firmware/arm_scmi/vendors/qcom/Kconfig @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0-only +menu "ARM SCMI QCOM Vendor Protocols" + +config QCOM_SCMI_GENERIC_EXT + tristate "Qualcomm Technologies, Inc. Qcom SCMI vendor Protocol" + depends on ARM_SCMI_PROTOCOL || COMPILE_TEST + help + The QCOM SCMI vendor protocol provides a generic way of exposing + a number of Qualcomm SoC specific features (like memory bus scaling) + through a mixture of pre-determined algorithm strings and param_id + pairs hosted on the SCMI controller. + + This driver defines/documents the message ID's used for this + communication and also exposes the operations used by the clients. +endmenu diff --git a/drivers/firmware/arm_scmi/vendors/qcom/Makefile b/drivers/firmware/arm_scmi/vendors/qcom/Makefile new file mode 100644 index 000000000000..6b98fabbebb8 --- /dev/null +++ b/drivers/firmware/arm_scmi/vendors/qcom/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_QCOM_SCMI_GENERIC_EXT) += qcom-generic-ext.o diff --git a/drivers/firmware/arm_scmi/vendors/qcom/qcom-generic-ext.c b/drivers/firmware/arm_scmi/vendors/qcom/qcom-generic-ext.c new file mode 100644 index 000000000000..1b209093d275 --- /dev/null +++ b/drivers/firmware/arm_scmi/vendors/qcom/qcom-generic-ext.c @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include + +#include "../../common.h" + +/** + * enum qcom_generic_ext_protocol_cmd - vendor specific commands supported by SCMI Qualcomm + * generic vendor protocol. + * + * This protocol is intended as a generic way of exposing a number of Qualcomm SoC + * specific features through a mixture of pre-determined algorithm string and param_id + * pairs hosted on the SCMI controller. + * + * The QCOM SCMI Vendor Protocol has the protocol id as 0x80 and vendor id set to + * Qualcomm and the implementation version set to 0x20000. The PROTOCOL_VERSION command + * returns version 1.0. + * + * @QCOM_SCMI_SET_PARAM: is used to set the parameter of a specific algo_str hosted on + * QCOM SCMI Vendor Protocol. The tx len depends on the algo_str used. + * @QCOM_SCMI_GET_PARAM: is used to get parameter information of a specific algo_str + * hosted on QCOM SCMI Vendor Protocol. The tx and rx len depends + * on the algo_str used. + * @QCOM_SCMI_START_ACTIVITY: is used to start the activity performed by the algo_str. + * @QCOM_SCMI_STOP_ACTIVITY: is used to stop a pre-existing activity performed by the algo_str. + */ +enum qcom_generic_ext_protocol_cmd { + QCOM_SCMI_SET_PARAM = 0x10, + QCOM_SCMI_GET_PARAM = 0x11, + QCOM_SCMI_START_ACTIVITY = 0x12, + QCOM_SCMI_STOP_ACTIVITY = 0x13, +}; + +/** + * struct qcom_scmi_msg - represents the various parameters to be populated + * for using the QCOM SCMI Vendor Protocol + * + * @ext_id: reserved, must be zero + * @algo_low: lower 32 bits of the algo_str + * @algo_high: upper 32 bits of the algo_str + * @param_id: serves as token message id to the specific algo_str + * @buf: serves as the payload to the specified param_id and algo_str pair + */ +struct qcom_scmi_msg { + __le32 ext_id; + __le32 algo_low; + __le32 algo_high; + __le32 param_id; + __le32 buf[]; +}; + +static int qcom_scmi_common_xfer(const struct scmi_protocol_handle *ph, + enum qcom_generic_ext_protocol_cmd cmd_id, void *buf, + size_t buf_len, u64 algo_str, u32 param_id, size_t rx_size) +{ + struct scmi_xfer *t; + struct qcom_scmi_msg *msg; + int ret; + + ret = ph->xops->xfer_get_init(ph, cmd_id, buf_len + sizeof(*msg), rx_size, &t); + if (ret) + return ret; + + msg = t->tx.buf; + msg->algo_low = cpu_to_le32(lower_32_bits(algo_str)); + msg->algo_high = cpu_to_le32(upper_32_bits(algo_str)); + msg->param_id = cpu_to_le32(param_id); + memcpy(msg->buf, buf, buf_len); + + ret = ph->xops->do_xfer(ph, t); + if (rx_size) + memcpy(buf, t->rx.buf, t->rx.len); + ph->xops->xfer_put(ph, t); + + return ret; +} + +static int qcom_scmi_set_param(const struct scmi_protocol_handle *ph, void *buf, size_t buf_len, + u64 algo_str, u32 param_id) +{ + return qcom_scmi_common_xfer(ph, QCOM_SCMI_SET_PARAM, buf, buf_len, algo_str, + param_id, 0); +} + +static int qcom_scmi_get_param(const struct scmi_protocol_handle *ph, void *buf, size_t buf_len, + u64 algo_str, u32 param_id, size_t rx_size) +{ + return qcom_scmi_common_xfer(ph, QCOM_SCMI_GET_PARAM, buf, buf_len, algo_str, + param_id, rx_size); +} + +static int qcom_scmi_start_activity(const struct scmi_protocol_handle *ph, void *buf, + size_t buf_len, u64 algo_str, u32 param_id) +{ + return qcom_scmi_common_xfer(ph, QCOM_SCMI_START_ACTIVITY, buf, buf_len, algo_str, + param_id, 0); +} + +static int qcom_scmi_stop_activity(const struct scmi_protocol_handle *ph, void *buf, + size_t buf_len, u64 algo_str, u32 param_id) +{ + return qcom_scmi_common_xfer(ph, QCOM_SCMI_STOP_ACTIVITY, buf, buf_len, algo_str, + param_id, 0); +} + +static struct qcom_generic_ext_ops qcom_proto_ops = { + .set_param = qcom_scmi_set_param, + .get_param = qcom_scmi_get_param, + .start_activity = qcom_scmi_start_activity, + .stop_activity = qcom_scmi_stop_activity, +}; + +static int qcom_generic_ext_protocol_init(const struct scmi_protocol_handle *ph) +{ + u32 version; + + ph->xops->version_get(ph, &version); + + dev_dbg(ph->dev, "QCOM Generic Vendor Version %d.%d\n", + PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); + + return 0; +} + +static const struct scmi_protocol qcom_generic_ext = { + .id = SCMI_PROTOCOL_QCOM_GENERIC, + .owner = THIS_MODULE, + .instance_init = &qcom_generic_ext_protocol_init, + .ops = &qcom_proto_ops, + .vendor_id = "Qualcomm", + .impl_ver = 0x20000, +}; +module_scmi_protocol(qcom_generic_ext); + +MODULE_DESCRIPTION("QCOM SCMI Generic Vendor protocol"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/scmi_qcom_protocol.h b/include/linux/scmi_qcom_protocol.h new file mode 100644 index 000000000000..465b2522ca29 --- /dev/null +++ b/include/linux/scmi_qcom_protocol.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * SCMI Message Protocol driver QCOM extension header + * + * Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef _LINUX_SCMI_QCOM_PROTOCOL_H +#define _LINUX_SCMI_QCOM_PROTOCOL_H + +#include + +#define SCMI_PROTOCOL_QCOM_GENERIC 0x80 + +struct scmi_protocol_handle; + +/** + * struct qcom_generic_ext_ops - represents the various operations provided + * by QCOM Generic Vendor Protocol + * + * @set_param: set parameter specified by param_id and algo_str pair. + * @get_param: retrieve parameter specified by param_id and algo_str pair. + * @start_activity: initiate a specific activity defined by algo_str. + * @stop_activity: halt previously initiated activity defined by algo_str. + */ +struct qcom_generic_ext_ops { + int (*set_param)(const struct scmi_protocol_handle *ph, void *buf, size_t buf_len, + u64 algo_str, u32 param_id); + int (*get_param)(const struct scmi_protocol_handle *ph, void *buf, size_t buf_len, + u64 algo_str, u32 param_id, size_t rx_size); + int (*start_activity)(const struct scmi_protocol_handle *ph, void *buf, size_t buf_len, + u64 algo_str, u32 param_id); + int (*stop_activity)(const struct scmi_protocol_handle *ph, void *buf, size_t buf_len, + u64 algo_str, u32 param_id); +}; + +#endif /* _LINUX_SCMI_QCOM_PROTOCOL_H */