From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 14DF013CF9E; Thu, 13 Jun 2024 12:06:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718280362; cv=none; b=Xu4z7qu01FK/cZ+Z3UPw6FoDrIqsfVyzfFYVxAOxN/Ru1uoAFw9MHbAecpJloPqTJgU3jve6CNj1Z96uPUFaiDXob2tP2TXhbljz8bGdcpZ2/G/LLS8gdzUsCRLkeFE3S0gJgz1Vnpp5vcsi+lze+I+/Sr9LEoNXcyDvQRNDEU8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718280362; c=relaxed/simple; bh=EM8RG2HzOdfqH+6wL2pzHjidJg+sy4LT6bcIObUH6qE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=d/veEfxXOnFPp79ZWahjyaypkPiD59jqDloUFnMDRzMwyjwMWzA/4y+uXT2w1muApbx0EXay13+CyCtmmM2tRnjYM1UGfq066lBjFoVUpgWSbfE/xZSaK6xUwCyeKxs3I/eQNCqtxmuKJyM3Um5iFqgWjxTnTojG64oQO74gOWA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UZdFBPDD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="UZdFBPDD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 926E4C2BBFC; Thu, 13 Jun 2024 12:06:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1718280362; bh=EM8RG2HzOdfqH+6wL2pzHjidJg+sy4LT6bcIObUH6qE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UZdFBPDDkVR6Duuwd0WfQWXFyQjUrZlkZjjJ9iDxGPZTXcRKg0QXSQPvczkN/6nIZ ngkPGQwQCFjkEAlB7yF2ysQyIqzXsMmSD6bhfURF/RaAJ18KkKCF5X/wu/o2Tf6D3w 6DiILodyTFYx/TfDdgdebBOZUUc/XAEEv4IPJN+I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Konrad Dybcio , Maulik Shah , Bjorn Andersson , Elliot Berman Subject: [PATCH 6.6 027/137] soc: qcom: rpmh-rsc: Enhance check for VRM in-flight request Date: Thu, 13 Jun 2024 13:33:27 +0200 Message-ID: <20240613113224.341941088@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240613113223.281378087@linuxfoundation.org> References: <20240613113223.281378087@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Maulik Shah commit f592cc5794747b81e53b53dd6e80219ee25f0611 upstream. Each RPMh VRM accelerator resource has 3 or 4 contiguous 4-byte aligned addresses associated with it. These control voltage, enable state, mode, and in legacy targets, voltage headroom. The current in-flight request checking logic looks for exact address matches. Requests for different addresses of the same RPMh resource as thus not detected as in-flight. Add new cmd-db API cmd_db_match_resource_addr() to enhance the in-flight request check for VRM requests by ignoring the address offset. This ensures that only one request is allowed to be in-flight for a given VRM resource. This is needed to avoid scenarios where request commands are carried out by RPMh hardware out-of-order leading to LDO regulator over-current protection triggering. Fixes: 658628e7ef78 ("drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs") Cc: stable@vger.kernel.org Reviewed-by: Konrad Dybcio Tested-by: Elliot Berman # sm8650-qrd Signed-off-by: Maulik Shah Link: https://lore.kernel.org/r/20240215-rpmh-rsc-fixes-v4-1-9cbddfcba05b@quicinc.com Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman --- drivers/soc/qcom/cmd-db.c | 32 +++++++++++++++++++++++++++++++- drivers/soc/qcom/rpmh-rsc.c | 3 ++- include/soc/qcom/cmd-db.h | 10 +++++++++- 3 files changed, 42 insertions(+), 3 deletions(-) --- a/drivers/soc/qcom/cmd-db.c +++ b/drivers/soc/qcom/cmd-db.c @@ -1,6 +1,10 @@ /* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (c) 2016-2018, 2020, The Linux Foundation. All rights reserved. */ +/* + * Copyright (c) 2016-2018, 2020, The Linux Foundation. All rights reserved. + * Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved. + */ +#include #include #include #include @@ -17,6 +21,8 @@ #define MAX_SLV_ID 8 #define SLAVE_ID_MASK 0x7 #define SLAVE_ID_SHIFT 16 +#define SLAVE_ID(addr) FIELD_GET(GENMASK(19, 16), addr) +#define VRM_ADDR(addr) FIELD_GET(GENMASK(19, 4), addr) /** * struct entry_header: header for each entry in cmddb @@ -221,6 +227,30 @@ const void *cmd_db_read_aux_data(const c EXPORT_SYMBOL(cmd_db_read_aux_data); /** + * cmd_db_match_resource_addr() - Compare if both Resource addresses are same + * + * @addr1: Resource address to compare + * @addr2: Resource address to compare + * + * Return: true if two addresses refer to the same resource, false otherwise + */ +bool cmd_db_match_resource_addr(u32 addr1, u32 addr2) +{ + /* + * Each RPMh VRM accelerator resource has 3 or 4 contiguous 4-byte + * aligned addresses associated with it. Ignore the offset to check + * for VRM requests. + */ + if (addr1 == addr2) + return true; + else if (SLAVE_ID(addr1) == CMD_DB_HW_VRM && VRM_ADDR(addr1) == VRM_ADDR(addr2)) + return true; + + return false; +} +EXPORT_SYMBOL_GPL(cmd_db_match_resource_addr); + +/** * cmd_db_read_slave_id - Get the slave ID for a given resource address * * @id: Resource id to query the DB for version --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2023-2024, Qualcomm Innovation Center, Inc. All rights reserved. */ #define pr_fmt(fmt) "%s " fmt, KBUILD_MODNAME @@ -557,7 +558,7 @@ static int check_for_req_inflight(struct for_each_set_bit(j, &curr_enabled, MAX_CMDS_PER_TCS) { addr = read_tcs_cmd(drv, drv->regs[RSC_DRV_CMD_ADDR], i, j); for (k = 0; k < msg->num_cmds; k++) { - if (addr == msg->cmds[k].addr) + if (cmd_db_match_resource_addr(msg->cmds[k].addr, addr)) return -EBUSY; } } --- a/include/soc/qcom/cmd-db.h +++ b/include/soc/qcom/cmd-db.h @@ -1,5 +1,8 @@ /* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. */ +/* + * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved. + */ #ifndef __QCOM_COMMAND_DB_H__ #define __QCOM_COMMAND_DB_H__ @@ -21,6 +24,8 @@ u32 cmd_db_read_addr(const char *resourc const void *cmd_db_read_aux_data(const char *resource_id, size_t *len); +bool cmd_db_match_resource_addr(u32 addr1, u32 addr2); + enum cmd_db_hw_type cmd_db_read_slave_id(const char *resource_id); int cmd_db_ready(void); @@ -31,6 +36,9 @@ static inline u32 cmd_db_read_addr(const static inline const void *cmd_db_read_aux_data(const char *resource_id, size_t *len) { return ERR_PTR(-ENODEV); } +static inline bool cmd_db_match_resource_addr(u32 addr1, u32 addr2) +{ return false; } + static inline enum cmd_db_hw_type cmd_db_read_slave_id(const char *resource_id) { return -ENODEV; }