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Wysocki" , Pavel Machek , Len Brown , Greg Kroah-Hartman , Nishanth Menon , Tero Kristo , Santosh Shilimkar Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Kamlesh Gurudasani , Kevin Hilman , Dhruva Gole , Vishal Mahaveer , Akashdeep Kaur , Markus Schneider-Pargmann X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=14376; i=msp@baylibre.com; h=from:subject:message-id; bh=2CW4DkhiaXDsgq9VGgtcLmFraQDSNnnAQzB+OkkiVB4=; b=owGbwMvMwCGm0rPl0RXRdfaMp9WSGNKZq2U2xvjG/Zgy4WWUftCL6giJyN0TLZN2fUw6Fnnjv E3H6+tbO0pZGMQ4GGTFFFnuflj4rk7u+oKIdY8cYeawMoEMYeDiFICJ8Dxh+O/GrXap6bBI0O9P dltml8ZpfXgzf3cCT3zgG0+rumUzFxxlZDgmKhg5eema7nl3HviYWVqJtV5LsWpQkWwL9z54WU2 cnQEA X-Developer-Key: i=msp@baylibre.com; a=openpgp; fpr=BADD88DB889FDC3E8A3D5FE612FA6A01E0A45B41 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 ebf6c0756ba450b398da82a972bd8ce79c6aec4c..b67c35c93802b50ed3ba7b97a21= 6fb39d6c46ebc 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; } =20 +/** + * 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 *hand= le, + 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 =3D 0; + + if (IS_ERR(handle)) + return PTR_ERR(handle); + if (!handle) + return -EINVAL; + + info =3D handle_to_ti_sci_info(handle); + dev =3D info->dev; + + xfer =3D 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 =3D PTR_ERR(xfer); + dev_err(dev, "Message alloc failed(%d)\n", ret); + return ret; + } + + ret =3D ti_sci_do_xfer(info, xfer); + if (ret) { + dev_err(dev, "Mbox send fail %d\n", ret); + goto fail; + } + + resp =3D (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 =3D -ENODEV; + goto fail; + } + + if (source) + *source =3D resp->wake_source; + if (timestamp) + *timestamp =3D resp->wake_timestamp; + if (pin) + *pin =3D resp->wake_pin; + if (mode) + *mode =3D 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 *ha= ndle, + 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 =3D 0; + + if (IS_ERR(handle)) + return PTR_ERR(handle); + if (!handle) + return -EINVAL; + + info =3D handle_to_ti_sci_info(handle); + dev =3D info->dev; + + xfer =3D 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 =3D PTR_ERR(xfer); + dev_err(dev, "Message alloc failed(%d)\n", ret); + return ret; + } + req =3D (struct ti_sci_msg_req_lpm_set_device_constraint *)xfer->xfer_buf; + req->id =3D id; + req->state =3D state; + + ret =3D ti_sci_do_xfer(info, xfer); + if (ret) { + dev_err(dev, "Mbox send fail %d\n", ret); + goto fail; + } + + resp =3D (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 =3D -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 *h= andle, + 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 =3D 0; + + if (IS_ERR(handle)) + return PTR_ERR(handle); + if (!handle) + return -EINVAL; + + info =3D handle_to_ti_sci_info(handle); + dev =3D info->dev; + + xfer =3D 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 =3D PTR_ERR(xfer); + dev_err(dev, "Message alloc failed(%d)\n", ret); + return ret; + } + req =3D (struct ti_sci_msg_req_lpm_set_latency_constraint *)xfer->xfer_bu= f; + req->latency =3D latency; + req->state =3D state; + + ret =3D ti_sci_do_xfer(info, xfer); + if (ret) { + dev_err(dev, "Mbox send fail %d\n", ret); + goto fail; + } + + resp =3D (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 =3D -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 =3D &ops->core_ops; struct ti_sci_dev_ops *dops =3D &ops->dev_ops; struct ti_sci_clk_ops *cops =3D &ops->clk_ops; + struct ti_sci_pm_ops *pmops =3D &ops->pm_ops; struct ti_sci_rm_core_ops *rm_core_ops =3D &ops->rm_core_ops; struct ti_sci_rm_irq_ops *iops =3D &ops->rm_irq_ops; struct ti_sci_rm_ringacc_ops *rops =3D &ops->rm_ring_ops; @@ -3014,6 +3195,13 @@ static void ti_sci_setup_ops(struct ti_sci_info *inf= o) cops->set_freq =3D ti_sci_cmd_clk_set_freq; cops->get_freq =3D ti_sci_cmd_clk_get_freq; =20 + if (info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED) { + pr_debug("detected DM managed LPM in fw_caps\n"); + pmops->lpm_wake_reason =3D ti_sci_msg_cmd_lpm_wake_reason; + pmops->set_device_constraint =3D ti_sci_cmd_set_device_constraint; + pmops->set_latency_constraint =3D ti_sci_cmd_set_latency_constraint; + } + rm_core_ops->get_range =3D ti_sci_cmd_get_resource_range; rm_core_ops->get_range_from_shost =3D ti_sci_cmd_get_resource_range_from_shost; @@ -3503,11 +3691,21 @@ static int __maybe_unused ti_sci_resume_noirq(struc= t device *dev) { struct ti_sci_info *info =3D dev_get_drvdata(dev); int ret =3D 0; + u32 source; + u64 time; + u8 pin; + u8 mode; =20 ret =3D ti_sci_cmd_set_io_isolation(&info->handle, TISCI_MSG_VALUE_IO_DIS= ABLE); if (ret) return ret; =20 + ret =3D ti_sci_msg_cmd_lpm_wake_reason(&info->handle, &source, &time, &pi= n, &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; } =20 diff --git a/drivers/firmware/ti_sci.h b/drivers/firmware/ti_sci.h index 8efe4d0e61fbe6c8e79671971b3ca2ddb6b2422e..053387d7baa064498e6a208daa7= f70040ef87281 100644 --- a/drivers/firmware/ti_sci.h +++ b/drivers/firmware/ti_sci.h @@ -38,7 +38,10 @@ =20 /* 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 =20 /* 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; =20 +/** + * struct ti_sci_msg_resp_lpm_wake_reason - Response for TI_SCI_MSG_LPM_WA= KE_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_REA= SON, + * 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 se= t a + * constraint on the low power mode that the SoC can enter. It allows + * configurable information to be easily shared from the application, as t= his + * 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 sen= t after + * current low power mode is exited. Any device can set a constraint on th= e low power + * mode that the SoC can enter. It allows configurable information to be e= asily 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 t= he 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 =20 /** diff --git a/include/linux/soc/ti/ti_sci_protocol.h b/include/linux/soc/ti/= ti_sci_protocol.h index 1f1871e23f764484420a659dfcbbd7155216c3bb..fd104b6668364ced32a3406504f= 7d2c4afab8889 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 =20 +/* 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 r= ange. * @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; --=20 2.45.2