From patchwork Wed Sep 4 19:42:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Schneider-Pargmann X-Patchwork-Id: 13791314 Received: from mail-wm1-f52.google.com (mail-wm1-f52.google.com [209.85.128.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8DD561E764A for ; Wed, 4 Sep 2024 19:42:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725478960; cv=none; b=SpkPel6HLe4buOuZ9WSv7D0F5AyPwUPDXUpjZjblRW3vXU9z7H6QquqXt3GjBsohKCKo1nhStJOIGMi4nKunrbwy0+vRz+mpSiw9J0TyNXyf+JROzCbaOGTGKumVkTov7sciCLBty/F2aPEYAyuFW9ao3TdFYYy39hxdofdMAp0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725478960; c=relaxed/simple; bh=/fd5owyttQUARHGf4YsqGEk0UcdvwY5o1YY1xrco+Iw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IKUawthO+qx0i9b0tdVtqoZVfcm3wVGrxZAa9tjmsy1gltxK/DGT7Eh19EelLlovK1NZRrcxuGYxxEh+rMwxTu+L+SC7LOOIiVAlwgI1h/IvwFP3aUlWZjiDI//VseJsQ6zvAETom55RqBHSYBaTwuwCkWQaUz2ff0Y5/cr2Qd4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b=cYBR9wVL; arc=none smtp.client-ip=209.85.128.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b="cYBR9wVL" Received: by mail-wm1-f52.google.com with SMTP id 5b1f17b1804b1-42c7bc97423so49900335e9.0 for ; Wed, 04 Sep 2024 12:42:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20230601.gappssmtp.com; s=20230601; t=1725478957; x=1726083757; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=DAaoWWdA0rzil793Z3WXYMUwGSQ45BCFMlLr8rrp1BU=; b=cYBR9wVLeIRLlBPSxdD0SmorSUX/j9ClEhvxwe2UDzQBE6rE9t3pqvTqX5KgZ0TXnR wUme7FYro6qtP+K7eSJmLoTv/EbxAFX4+mumD5N5T+1chvmtlppk3p+gtNV5kU17ZTS3 pVczlYqk+WeORz/4VZS5mtFMo3Q3TSqkKgZ1GSAnL4qvh1GDFrsvxR/kjQsIDbVHV5m9 1+ag2iuz41H5Kwyw5uokqgAmCvm5cS20gIeny9bti6rX3OsH5AHNzcwYCk88C1SWggz2 mIpbjbWE41m1So2rSaNjeQ6wrqzr5bbjXs9VJHBEk950fh8BJTWHYKF2kZrvISZ8ja+N b0Qg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725478957; x=1726083757; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=DAaoWWdA0rzil793Z3WXYMUwGSQ45BCFMlLr8rrp1BU=; b=Kl0kAi/12GzJdtlxv+8cpXVrB5Lrg3Bhs9qktAd0UIN2GbdoEDaAtDKuoXYL9f68cZ O7Wj4vaeJWovv96e1erODC0sCt+sLMTptgcBflycltTbfSUj9S1Cvql3yL5ycPSF37wx GfaZ3mud2tdgzIJxeyA9a/hjdSiio8P4Xbhawlhg6xJFp9c/KSUj391uqrrFmWwEMOl9 EI+rFWHEJP2p7pxvWf+Bn6bs1TfOZNQD8h15ovc003LwyNWo5geQdkOm0PEAuGHo8Tdi HvEPQOPaid9+qy+IskQV4A8LA0G7NwRJGTHfUu8EuQKy6cZs675cHFZm44bwzR775Yh5 bvrg== X-Forwarded-Encrypted: i=1; AJvYcCWcvxeZtiPsZS5go36t5CLKLbees9LHhM+LePxpWsONpkLorubaVlrFHrtsHYzSevmrBB52kM6lLg==@vger.kernel.org X-Gm-Message-State: AOJu0YzCJuRSfcH5cQKl/eXaVokQy2Ml9VK37N1YgngwE2YVboLUTOdv LKbQdgbzFpWCojbqjubjydXlEjBO6kQ7Jb6j8uIljj+8IUQiELj9LoqEoxCa2ss= X-Google-Smtp-Source: AGHT+IE3Asu/D6Oq+2Fzb7u82lWrwXMTG6Ol7gYhZJOeCbcioHLou9ypdf65r7/Ocpc72jIOeXZP5w== X-Received: by 2002:a05:600c:5119:b0:426:5520:b835 with SMTP id 5b1f17b1804b1-42c9a360285mr1570855e9.5.1725478956529; Wed, 04 Sep 2024 12:42:36 -0700 (PDT) Received: from blmsp.fritz.box ([2001:4091:a247:83d8:caa7:e645:3612:56b6]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-374c03595fcsm12473625f8f.98.2024.09.04.12.42.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Sep 2024 12:42:36 -0700 (PDT) From: Markus Schneider-Pargmann To: Nishanth Menon , Tero Kristo , Santosh Shilimkar , "Rafael J . Wysocki" , Pavel Machek , Len Brown , Greg Kroah-Hartman Cc: Vibhore Vardhan , Kevin Hilman , Dhruva Gole , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Dave Gerlach , Georgi Vlaev , Akashdeep Kaur , Markus Schneider-Pargmann Subject: [PATCH v12 4/5] firmware: ti_sci: Introduce Power Management Ops Date: Wed, 4 Sep 2024 21:42:28 +0200 Message-ID: <20240904194229.109886-5-msp@baylibre.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240904194229.109886-1-msp@baylibre.com> References: <20240904194229.109886-1-msp@baylibre.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Dave Gerlach Introduce power management ops supported by the TISCI Low Power Mode API [1]. 1) TISCI_MSG_LPM_WAKE_REASON Get which wake up source woke the SoC from Low Power Mode. The wake up source IDs will be common for all K3 platforms. 2) TISCI_MSG_LPM_SET_DEVICE_CONSTRAINT Set LPM constraint on behalf of a device. By setting a constraint, the device ensures that it will not be powered off or reset in the selected mode. 3) TISCI_MSG_LPM_SET_LATENCY_CONSTRAINT Set LPM resume latency constraint. By setting a constraint, the host ensures that the resume time from selected mode will be less than the constraint value. [1] https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/pm/lpm.html Signed-off-by: Dave Gerlach [g-vlaev@ti.com: LPM_WAKE_REASON and IO_ISOLATION support] Signed-off-by: Georgi Vlaev [a-kaur@ti.com: SET_DEVICE_CONSTRAINT support] Signed-off-by: Akashdeep Kaur [vibhore@ti.com: SET_LATENCY_CONSTRAINT support] Signed-off-by: Vibhore Vardhan Signed-off-by: Kevin Hilman Reviewed-by: Akashdeep Kaur Tested-by: Dhruva Gole Signed-off-by: Markus Schneider-Pargmann Acked-by: Dhruva Gole --- drivers/firmware/ti_sci.c | 198 +++++++++++++++++++++++++ drivers/firmware/ti_sci.h | 76 ++++++++++ include/linux/soc/ti/ti_sci_protocol.h | 26 ++++ 3 files changed, 300 insertions(+) diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c index 55e855f83340..e0018d3e2df8 100644 --- a/drivers/firmware/ti_sci.c +++ b/drivers/firmware/ti_sci.c @@ -1833,6 +1833,186 @@ static int ti_sci_cmd_set_io_isolation(const struct ti_sci_handle *handle, return ret; } +/** + * ti_sci_msg_cmd_lpm_wake_reason() - Get the wakeup source from LPM + * @handle: Pointer to TI SCI handle + * @source: The wakeup source that woke the SoC from LPM + * @timestamp: Timestamp of the wakeup event + * @pin: The pin that has triggered wake up + * @mode: The last entered low power mode + * + * Return: 0 if all went well, else returns appropriate error value. + */ +static int ti_sci_msg_cmd_lpm_wake_reason(const struct ti_sci_handle *handle, + u32 *source, u64 *timestamp, u8 *pin, u8 *mode) +{ + struct ti_sci_info *info; + struct ti_sci_xfer *xfer; + struct ti_sci_msg_resp_lpm_wake_reason *resp; + struct device *dev; + int ret = 0; + + if (IS_ERR(handle)) + return PTR_ERR(handle); + if (!handle) + return -EINVAL; + + info = handle_to_ti_sci_info(handle); + dev = info->dev; + + xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_LPM_WAKE_REASON, + TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, + sizeof(struct ti_sci_msg_hdr), + sizeof(*resp)); + if (IS_ERR(xfer)) { + ret = PTR_ERR(xfer); + dev_err(dev, "Message alloc failed(%d)\n", ret); + return ret; + } + + ret = ti_sci_do_xfer(info, xfer); + if (ret) { + dev_err(dev, "Mbox send fail %d\n", ret); + goto fail; + } + + resp = (struct ti_sci_msg_resp_lpm_wake_reason *)xfer->xfer_buf; + + if (!ti_sci_is_response_ack(resp)) { + dev_err(dev, "Failed to get wake reason\n"); + ret = -ENODEV; + goto fail; + } + + if (source) + *source = resp->wake_source; + if (timestamp) + *timestamp = resp->wake_timestamp; + if (pin) + *pin = resp->wake_pin; + if (mode) + *mode = resp->mode; + +fail: + ti_sci_put_one_xfer(&info->minfo, xfer); + + return ret; +} + +/** + * ti_sci_cmd_set_device_constraint() - Set LPM constraint on behalf of a device + * @handle: pointer to TI SCI handle + * @id: Device identifier + * @state: The desired state of device constraint: set or clear + * + * Return: 0 if all went well, else returns appropriate error value. + */ +static int ti_sci_cmd_set_device_constraint(const struct ti_sci_handle *handle, + u32 id, u8 state) +{ + struct ti_sci_info *info; + struct ti_sci_msg_req_lpm_set_device_constraint *req; + struct ti_sci_msg_hdr *resp; + struct ti_sci_xfer *xfer; + struct device *dev; + int ret = 0; + + if (IS_ERR(handle)) + return PTR_ERR(handle); + if (!handle) + return -EINVAL; + + info = handle_to_ti_sci_info(handle); + dev = info->dev; + + xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_LPM_SET_DEVICE_CONSTRAINT, + TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, + sizeof(*req), sizeof(*resp)); + if (IS_ERR(xfer)) { + ret = PTR_ERR(xfer); + dev_err(dev, "Message alloc failed(%d)\n", ret); + return ret; + } + req = (struct ti_sci_msg_req_lpm_set_device_constraint *)xfer->xfer_buf; + req->id = id; + req->state = state; + + ret = ti_sci_do_xfer(info, xfer); + if (ret) { + dev_err(dev, "Mbox send fail %d\n", ret); + goto fail; + } + + resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; + + if (!ti_sci_is_response_ack(resp)) { + dev_err(dev, "Failed to set device constraint\n"); + ret = -ENODEV; + } + +fail: + ti_sci_put_one_xfer(&info->minfo, xfer); + + return ret; +} + +/** + * ti_sci_cmd_set_latency_constraint() - Set LPM resume latency constraint + * @handle: pointer to TI SCI handle + * @latency: maximum acceptable latency (in ms) to wake up from LPM + * @state: The desired state of latency constraint: set or clear + * + * Return: 0 if all went well, else returns appropriate error value. + */ +static int ti_sci_cmd_set_latency_constraint(const struct ti_sci_handle *handle, + u16 latency, u8 state) +{ + struct ti_sci_info *info; + struct ti_sci_msg_req_lpm_set_latency_constraint *req; + struct ti_sci_msg_hdr *resp; + struct ti_sci_xfer *xfer; + struct device *dev; + int ret = 0; + + if (IS_ERR(handle)) + return PTR_ERR(handle); + if (!handle) + return -EINVAL; + + info = handle_to_ti_sci_info(handle); + dev = info->dev; + + xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_LPM_SET_LATENCY_CONSTRAINT, + TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, + sizeof(*req), sizeof(*resp)); + if (IS_ERR(xfer)) { + ret = PTR_ERR(xfer); + dev_err(dev, "Message alloc failed(%d)\n", ret); + return ret; + } + req = (struct ti_sci_msg_req_lpm_set_latency_constraint *)xfer->xfer_buf; + req->latency = latency; + req->state = state; + + ret = ti_sci_do_xfer(info, xfer); + if (ret) { + dev_err(dev, "Mbox send fail %d\n", ret); + goto fail; + } + + resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; + + if (!ti_sci_is_response_ack(resp)) { + dev_err(dev, "Failed to set device constraint\n"); + ret = -ENODEV; + } + +fail: + ti_sci_put_one_xfer(&info->minfo, xfer); + + return ret; +} + static int ti_sci_cmd_core_reboot(const struct ti_sci_handle *handle) { struct ti_sci_info *info; @@ -2975,6 +3155,7 @@ static void ti_sci_setup_ops(struct ti_sci_info *info) struct ti_sci_core_ops *core_ops = &ops->core_ops; struct ti_sci_dev_ops *dops = &ops->dev_ops; struct ti_sci_clk_ops *cops = &ops->clk_ops; + struct ti_sci_pm_ops *pmops = &ops->pm_ops; struct ti_sci_rm_core_ops *rm_core_ops = &ops->rm_core_ops; struct ti_sci_rm_irq_ops *iops = &ops->rm_irq_ops; struct ti_sci_rm_ringacc_ops *rops = &ops->rm_ring_ops; @@ -3014,6 +3195,13 @@ static void ti_sci_setup_ops(struct ti_sci_info *info) cops->set_freq = ti_sci_cmd_clk_set_freq; cops->get_freq = ti_sci_cmd_clk_get_freq; + if (info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED) { + pr_debug("detected DM managed LPM in fw_caps\n"); + pmops->lpm_wake_reason = ti_sci_msg_cmd_lpm_wake_reason; + pmops->set_device_constraint = ti_sci_cmd_set_device_constraint; + pmops->set_latency_constraint = ti_sci_cmd_set_latency_constraint; + } + rm_core_ops->get_range = ti_sci_cmd_get_resource_range; rm_core_ops->get_range_from_shost = ti_sci_cmd_get_resource_range_from_shost; @@ -3505,11 +3693,21 @@ static int __maybe_unused ti_sci_resume_noirq(struct device *dev) { struct ti_sci_info *info = dev_get_drvdata(dev); int ret = 0; + u32 source; + u64 time; + u8 pin; + u8 mode; ret = ti_sci_cmd_set_io_isolation(&info->handle, TISCI_MSG_VALUE_IO_DISABLE); if (ret) return ret; + ret = ti_sci_msg_cmd_lpm_wake_reason(&info->handle, &source, &time, &pin, &mode); + /* Do not fail to resume on error as the wake reason is not critical */ + if (!ret) + dev_info(dev, "ti_sci: wakeup source:0x%x, pin:0x%x, mode:0x%x\n", + source, pin, mode); + return 0; } diff --git a/drivers/firmware/ti_sci.h b/drivers/firmware/ti_sci.h index 8efe4d0e61fb..053387d7baa0 100644 --- a/drivers/firmware/ti_sci.h +++ b/drivers/firmware/ti_sci.h @@ -38,7 +38,10 @@ /* Low Power Mode Requests */ #define TI_SCI_MSG_PREPARE_SLEEP 0x0300 +#define TI_SCI_MSG_LPM_WAKE_REASON 0x0306 #define TI_SCI_MSG_SET_IO_ISOLATION 0x0307 +#define TI_SCI_MSG_LPM_SET_DEVICE_CONSTRAINT 0x0309 +#define TI_SCI_MSG_LPM_SET_LATENCY_CONSTRAINT 0x030A /* Resource Management Requests */ #define TI_SCI_MSG_GET_RESOURCE_RANGE 0x1500 @@ -610,6 +613,79 @@ struct ti_sci_msg_req_set_io_isolation { u8 state; } __packed; +/** + * struct ti_sci_msg_resp_lpm_wake_reason - Response for TI_SCI_MSG_LPM_WAKE_REASON. + * + * @hdr: Generic header. + * @wake_source: The wake up source that woke soc from LPM. + * @wake_timestamp: Timestamp at which soc woke. + * @wake_pin: The pin that has triggered wake up. + * @mode: The last entered low power mode. + * @rsvd: Reserved for future use. + * + * Response to a generic message with message type TI_SCI_MSG_LPM_WAKE_REASON, + * used to query the wake up source, pin and entered low power mode. + */ +struct ti_sci_msg_resp_lpm_wake_reason { + struct ti_sci_msg_hdr hdr; + u32 wake_source; + u64 wake_timestamp; + u8 wake_pin; + u8 mode; + u32 rsvd[2]; +} __packed; + +/** + * struct ti_sci_msg_req_lpm_set_device_constraint - Request for + * TISCI_MSG_LPM_SET_DEVICE_CONSTRAINT. + * + * @hdr: TISCI header to provide ACK/NAK flags to the host. + * @id: Device ID of device whose constraint has to be modified. + * @state: The desired state of device constraint: set or clear. + * @rsvd: Reserved for future use. + * + * This message is used by host to set constraint on the device. This can be + * sent anytime after boot before prepare sleep message. Any device can set a + * constraint on the low power mode that the SoC can enter. It allows + * configurable information to be easily shared from the application, as this + * is a non-secure message and therefore can be sent by anyone. By setting a + * constraint, the device ensures that it will not be powered off or reset in + * the selected mode. Note: Access Restriction: Exclusivity flag of Device will + * be honored. If some other host already has constraint on this device ID, + * NACK will be returned. + */ +struct ti_sci_msg_req_lpm_set_device_constraint { + struct ti_sci_msg_hdr hdr; + u32 id; + u8 state; + u32 rsvd[2]; +} __packed; + +/** + * struct ti_sci_msg_req_lpm_set_latency_constraint - Request for + * TISCI_MSG_LPM_SET_LATENCY_CONSTRAINT. + * + * @hdr: TISCI header to provide ACK/NAK flags to the host. + * @wkup_latency: The maximum acceptable latency to wake up from low power mode + * in milliseconds. The deeper the state, the higher the latency. + * @state: The desired state of wakeup latency constraint: set or clear. + * @rsvd: Reserved for future use. + * + * This message is used by host to set wakeup latency from low power mode. This can + * be sent anytime after boot before prepare sleep message, and can be sent after + * current low power mode is exited. Any device can set a constraint on the low power + * mode that the SoC can enter. It allows configurable information to be easily shared + * from the application, as this is a non-secure message and therefore can be sent by + * anyone. By setting a wakeup latency constraint, the host ensures that the resume time + * from selected low power mode will be less than the constraint value. + */ +struct ti_sci_msg_req_lpm_set_latency_constraint { + struct ti_sci_msg_hdr hdr; + u16 latency; + u8 state; + u32 rsvd; +} __packed; + #define TI_SCI_IRQ_SECONDARY_HOST_INVALID 0xff /** diff --git a/include/linux/soc/ti/ti_sci_protocol.h b/include/linux/soc/ti/ti_sci_protocol.h index 1f1871e23f76..fd104b666836 100644 --- a/include/linux/soc/ti/ti_sci_protocol.h +++ b/include/linux/soc/ti/ti_sci_protocol.h @@ -199,6 +199,31 @@ struct ti_sci_clk_ops { #define TISCI_MSG_VALUE_IO_ENABLE 1 #define TISCI_MSG_VALUE_IO_DISABLE 0 +/* TISCI LPM constraint state values */ +#define TISCI_MSG_CONSTRAINT_SET 1 +#define TISCI_MSG_CONSTRAINT_CLR 0 + +/** + * struct ti_sci_pm_ops - Low Power Mode (LPM) control operations + * @lpm_wake_reason: Get the wake up source that woke the SoC from LPM + * - source: The wake up source that woke soc from LPM. + * - timestamp: Timestamp at which soc woke. + * @set_device_constraint: Set LPM constraint on behalf of a device + * - id: Device Identifier + * - state: The desired state of device constraint: set or clear. + * @set_latency_constraint: Set LPM resume latency constraint + * - latency: maximum acceptable latency to wake up from low power mode + * - state: The desired state of latency constraint: set or clear. + */ +struct ti_sci_pm_ops { + int (*lpm_wake_reason)(const struct ti_sci_handle *handle, + u32 *source, u64 *timestamp, u8 *pin, u8 *mode); + int (*set_device_constraint)(const struct ti_sci_handle *handle, + u32 id, u8 state); + int (*set_latency_constraint)(const struct ti_sci_handle *handle, + u16 latency, u8 state); +}; + /** * struct ti_sci_resource_desc - Description of TI SCI resource instance range. * @start: Start index of the first resource range. @@ -543,6 +568,7 @@ struct ti_sci_ops { struct ti_sci_core_ops core_ops; struct ti_sci_dev_ops dev_ops; struct ti_sci_clk_ops clk_ops; + struct ti_sci_pm_ops pm_ops; struct ti_sci_rm_core_ops rm_core_ops; struct ti_sci_rm_irq_ops rm_irq_ops; struct ti_sci_rm_ringacc_ops rm_ring_ops;