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firmware: ti_sci: Add support for processor control

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Texas Instrument's System Control Interface (TI-SCI) Message Protocol
is used in Texas Instrument's System on Chip (SoC) such as those
in K3 family AM654 SoC to communicate between various compute
processors with a central system controller entity.

The system controller provides various services including the control
of other compute processors within the SoC. Extend the TI-SCI protocol
support to add various TI-SCI commands to invoke services associated
with power and reset control, and boot vector management of the
various compute processors from the Linux kernel.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
This commit is contained in:
Suman Anna 2019-06-05 17:33:34 -05:00 committed by Santosh Shilimkar
parent 68608b5e50
commit 1e407f337f
3 changed files with 516 additions and 0 deletions
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350
drivers/firmware/ti_sci.c
View File

@ -2479,6 +2479,348 @@ fail:
return ret;
}
/**
* ti_sci_cmd_proc_request() - Command to request a physical processor control
* @handle: Pointer to TI SCI handle
* @proc_id: Processor ID this request is for
*
* Return: 0 if all went well, else returns appropriate error value.
*/
static int ti_sci_cmd_proc_request(const struct ti_sci_handle *handle,
u8 proc_id)
{
struct ti_sci_msg_req_proc_request *req;
struct ti_sci_msg_hdr *resp;
struct ti_sci_info *info;
struct ti_sci_xfer *xfer;
struct device *dev;
int ret = 0;
if (!handle)
return -EINVAL;
if (IS_ERR(handle))
return PTR_ERR(handle);
info = handle_to_ti_sci_info(handle);
dev = info->dev;
xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_REQUEST,
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_proc_request *)xfer->xfer_buf;
req->processor_id = proc_id;
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->tx_message.buf;
ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
fail:
ti_sci_put_one_xfer(&info->minfo, xfer);
return ret;
}
/**
* ti_sci_cmd_proc_release() - Command to release a physical processor control
* @handle: Pointer to TI SCI handle
* @proc_id: Processor ID this request is for
*
* Return: 0 if all went well, else returns appropriate error value.
*/
static int ti_sci_cmd_proc_release(const struct ti_sci_handle *handle,
u8 proc_id)
{
struct ti_sci_msg_req_proc_release *req;
struct ti_sci_msg_hdr *resp;
struct ti_sci_info *info;
struct ti_sci_xfer *xfer;
struct device *dev;
int ret = 0;
if (!handle)
return -EINVAL;
if (IS_ERR(handle))
return PTR_ERR(handle);
info = handle_to_ti_sci_info(handle);
dev = info->dev;
xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_RELEASE,
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_proc_release *)xfer->xfer_buf;
req->processor_id = proc_id;
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->tx_message.buf;
ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
fail:
ti_sci_put_one_xfer(&info->minfo, xfer);
return ret;
}
/**
* ti_sci_cmd_proc_handover() - Command to handover a physical processor
* control to a host in the processor's access
* control list.
* @handle: Pointer to TI SCI handle
* @proc_id: Processor ID this request is for
* @host_id: Host ID to get the control of the processor
*
* Return: 0 if all went well, else returns appropriate error value.
*/
static int ti_sci_cmd_proc_handover(const struct ti_sci_handle *handle,
u8 proc_id, u8 host_id)
{
struct ti_sci_msg_req_proc_handover *req;
struct ti_sci_msg_hdr *resp;
struct ti_sci_info *info;
struct ti_sci_xfer *xfer;
struct device *dev;
int ret = 0;
if (!handle)
return -EINVAL;
if (IS_ERR(handle))
return PTR_ERR(handle);
info = handle_to_ti_sci_info(handle);
dev = info->dev;
xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_HANDOVER,
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_proc_handover *)xfer->xfer_buf;
req->processor_id = proc_id;
req->host_id = host_id;
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->tx_message.buf;
ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
fail:
ti_sci_put_one_xfer(&info->minfo, xfer);
return ret;
}
/**
* ti_sci_cmd_proc_set_config() - Command to set the processor boot
* configuration flags
* @handle: Pointer to TI SCI handle
* @proc_id: Processor ID this request is for
* @config_flags_set: Configuration flags to be set
* @config_flags_clear: Configuration flags to be cleared.
*
* Return: 0 if all went well, else returns appropriate error value.
*/
static int ti_sci_cmd_proc_set_config(const struct ti_sci_handle *handle,
u8 proc_id, u64 bootvector,
u32 config_flags_set,
u32 config_flags_clear)
{
struct ti_sci_msg_req_set_config *req;
struct ti_sci_msg_hdr *resp;
struct ti_sci_info *info;
struct ti_sci_xfer *xfer;
struct device *dev;
int ret = 0;
if (!handle)
return -EINVAL;
if (IS_ERR(handle))
return PTR_ERR(handle);
info = handle_to_ti_sci_info(handle);
dev = info->dev;
xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CONFIG,
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_set_config *)xfer->xfer_buf;
req->processor_id = proc_id;
req->bootvector_low = bootvector & TI_SCI_ADDR_LOW_MASK;
req->bootvector_high = (bootvector & TI_SCI_ADDR_HIGH_MASK) >>
TI_SCI_ADDR_HIGH_SHIFT;
req->config_flags_set = config_flags_set;
req->config_flags_clear = config_flags_clear;
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->tx_message.buf;
ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
fail:
ti_sci_put_one_xfer(&info->minfo, xfer);
return ret;
}
/**
* ti_sci_cmd_proc_set_control() - Command to set the processor boot
* control flags
* @handle: Pointer to TI SCI handle
* @proc_id: Processor ID this request is for
* @control_flags_set: Control flags to be set
* @control_flags_clear: Control flags to be cleared
*
* Return: 0 if all went well, else returns appropriate error value.
*/
static int ti_sci_cmd_proc_set_control(const struct ti_sci_handle *handle,
u8 proc_id, u32 control_flags_set,
u32 control_flags_clear)
{
struct ti_sci_msg_req_set_ctrl *req;
struct ti_sci_msg_hdr *resp;
struct ti_sci_info *info;
struct ti_sci_xfer *xfer;
struct device *dev;
int ret = 0;
if (!handle)
return -EINVAL;
if (IS_ERR(handle))
return PTR_ERR(handle);
info = handle_to_ti_sci_info(handle);
dev = info->dev;
xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CTRL,
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_set_ctrl *)xfer->xfer_buf;
req->processor_id = proc_id;
req->control_flags_set = control_flags_set;
req->control_flags_clear = control_flags_clear;
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->tx_message.buf;
ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
fail:
ti_sci_put_one_xfer(&info->minfo, xfer);
return ret;
}
/**
* ti_sci_cmd_get_boot_status() - Command to get the processor boot status
* @handle: Pointer to TI SCI handle
* @proc_id: Processor ID this request is for
*
* Return: 0 if all went well, else returns appropriate error value.
*/
static int ti_sci_cmd_proc_get_status(const struct ti_sci_handle *handle,
u8 proc_id, u64 *bv, u32 *cfg_flags,
u32 *ctrl_flags, u32 *sts_flags)
{
struct ti_sci_msg_resp_get_status *resp;
struct ti_sci_msg_req_get_status *req;
struct ti_sci_info *info;
struct ti_sci_xfer *xfer;
struct device *dev;
int ret = 0;
if (!handle)
return -EINVAL;
if (IS_ERR(handle))
return PTR_ERR(handle);
info = handle_to_ti_sci_info(handle);
dev = info->dev;
xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_STATUS,
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_get_status *)xfer->xfer_buf;
req->processor_id = proc_id;
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_get_status *)xfer->tx_message.buf;
if (!ti_sci_is_response_ack(resp)) {
ret = -ENODEV;
} else {
*bv = (resp->bootvector_low & TI_SCI_ADDR_LOW_MASK) |
(((u64)resp->bootvector_high << TI_SCI_ADDR_HIGH_SHIFT) &
TI_SCI_ADDR_HIGH_MASK);
*cfg_flags = resp->config_flags;
*ctrl_flags = resp->control_flags;
*sts_flags = resp->status_flags;
}
fail:
ti_sci_put_one_xfer(&info->minfo, xfer);
return ret;
}
/*
* ti_sci_setup_ops() - Setup the operations structures
* @info: pointer to TISCI pointer
@ -2494,6 +2836,7 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
struct ti_sci_rm_ringacc_ops *rops = &ops->rm_ring_ops;
struct ti_sci_rm_psil_ops *psilops = &ops->rm_psil_ops;
struct ti_sci_rm_udmap_ops *udmap_ops = &ops->rm_udmap_ops;
struct ti_sci_proc_ops *pops = &ops->proc_ops;
core_ops->reboot_device = ti_sci_cmd_core_reboot;
@ -2543,6 +2886,13 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
udmap_ops->tx_ch_cfg = ti_sci_cmd_rm_udmap_tx_ch_cfg;
udmap_ops->rx_ch_cfg = ti_sci_cmd_rm_udmap_rx_ch_cfg;
udmap_ops->rx_flow_cfg = ti_sci_cmd_rm_udmap_rx_flow_cfg;
pops->request = ti_sci_cmd_proc_request;
pops->release = ti_sci_cmd_proc_release;
pops->handover = ti_sci_cmd_proc_handover;
pops->set_config = ti_sci_cmd_proc_set_config;
pops->set_control = ti_sci_cmd_proc_set_control;
pops->get_status = ti_sci_cmd_proc_get_status;
}
/**

135
drivers/firmware/ti_sci.h
View File

@ -71,6 +71,14 @@
#define TISCI_MSG_RM_UDMAP_FLOW_GET_CFG 0x1232
#define TISCI_MSG_RM_UDMAP_FLOW_SIZE_THRESH_GET_CFG 0x1233
/* Processor Control requests */
#define TI_SCI_MSG_PROC_REQUEST 0xc000
#define TI_SCI_MSG_PROC_RELEASE 0xc001
#define TI_SCI_MSG_PROC_HANDOVER 0xc005
#define TI_SCI_MSG_SET_CONFIG 0xc100
#define TI_SCI_MSG_SET_CTRL 0xc101
#define TI_SCI_MSG_GET_STATUS 0xc400
/**
* struct ti_sci_msg_hdr - Generic Message Header for All messages and responses
* @type: Type of messages: One of TI_SCI_MSG* values
@ -1238,4 +1246,131 @@ struct ti_sci_msg_rm_udmap_flow_cfg_req {
u8 rx_ps_location;
} __packed;
/**
* struct ti_sci_msg_req_proc_request - Request a processor
* @hdr: Generic Header
* @processor_id: ID of processor being requested
*
* Request type is TI_SCI_MSG_PROC_REQUEST, response is a generic ACK/NACK
* message.
*/
struct ti_sci_msg_req_proc_request {
struct ti_sci_msg_hdr hdr;
u8 processor_id;
} __packed;
/**
* struct ti_sci_msg_req_proc_release - Release a processor
* @hdr: Generic Header
* @processor_id: ID of processor being released
*
* Request type is TI_SCI_MSG_PROC_RELEASE, response is a generic ACK/NACK
* message.
*/
struct ti_sci_msg_req_proc_release {
struct ti_sci_msg_hdr hdr;
u8 processor_id;
} __packed;
/**
* struct ti_sci_msg_req_proc_handover - Handover a processor to a host
* @hdr: Generic Header
* @processor_id: ID of processor being handed over
* @host_id: Host ID the control needs to be transferred to
*
* Request type is TI_SCI_MSG_PROC_HANDOVER, response is a generic ACK/NACK
* message.
*/
struct ti_sci_msg_req_proc_handover {
struct ti_sci_msg_hdr hdr;
u8 processor_id;
u8 host_id;
} __packed;
/* Boot Vector masks */
#define TI_SCI_ADDR_LOW_MASK GENMASK_ULL(31, 0)
#define TI_SCI_ADDR_HIGH_MASK GENMASK_ULL(63, 32)
#define TI_SCI_ADDR_HIGH_SHIFT 32
/**
* struct ti_sci_msg_req_set_config - Set Processor boot configuration
* @hdr: Generic Header
* @processor_id: ID of processor being configured
* @bootvector_low: Lower 32 bit address (Little Endian) of boot vector
* @bootvector_high: Higher 32 bit address (Little Endian) of boot vector
* @config_flags_set: Optional Processor specific Config Flags to set.
* Setting a bit here implies the corresponding mode
* will be set
* @config_flags_clear: Optional Processor specific Config Flags to clear.
* Setting a bit here implies the corresponding mode
* will be cleared
*
* Request type is TI_SCI_MSG_PROC_HANDOVER, response is a generic ACK/NACK
* message.
*/
struct ti_sci_msg_req_set_config {
struct ti_sci_msg_hdr hdr;
u8 processor_id;
u32 bootvector_low;
u32 bootvector_high;
u32 config_flags_set;
u32 config_flags_clear;
} __packed;
/**
* struct ti_sci_msg_req_set_ctrl - Set Processor boot control flags
* @hdr: Generic Header
* @processor_id: ID of processor being configured
* @control_flags_set: Optional Processor specific Control Flags to set.
* Setting a bit here implies the corresponding mode
* will be set
* @control_flags_clear:Optional Processor specific Control Flags to clear.
* Setting a bit here implies the corresponding mode
* will be cleared
*
* Request type is TI_SCI_MSG_SET_CTRL, response is a generic ACK/NACK
* message.
*/
struct ti_sci_msg_req_set_ctrl {
struct ti_sci_msg_hdr hdr;
u8 processor_id;
u32 control_flags_set;
u32 control_flags_clear;
} __packed;
/**
* struct ti_sci_msg_req_get_status - Processor boot status request
* @hdr: Generic Header
* @processor_id: ID of processor whose status is being requested
*
* Request type is TI_SCI_MSG_GET_STATUS, response is an appropriate
* message, or NACK in case of inability to satisfy request.
*/
struct ti_sci_msg_req_get_status {
struct ti_sci_msg_hdr hdr;
u8 processor_id;
} __packed;
/**
* struct ti_sci_msg_resp_get_status - Processor boot status response
* @hdr: Generic Header
* @processor_id: ID of processor whose status is returned
* @bootvector_low: Lower 32 bit address (Little Endian) of boot vector
* @bootvector_high: Higher 32 bit address (Little Endian) of boot vector
* @config_flags: Optional Processor specific Config Flags set currently
* @control_flags: Optional Processor specific Control Flags set currently
* @status_flags: Optional Processor specific Status Flags set currently
*
* Response structure to a TI_SCI_MSG_GET_STATUS request.
*/
struct ti_sci_msg_resp_get_status {
struct ti_sci_msg_hdr hdr;
u8 processor_id;
u32 bootvector_low;
u32 bootvector_high;
u32 config_flags;
u32 control_flags;
u32 status_flags;
} __packed;
#endif /* __TI_SCI_H */

31
include/linux/soc/ti/ti_sci_protocol.h
View File

@ -453,12 +453,42 @@ struct ti_sci_rm_udmap_ops {
const struct ti_sci_msg_rm_udmap_flow_cfg *params);
};
/**
* struct ti_sci_proc_ops - Processor Control operations
* @request: Request to control a physical processor. The requesting host
* should be in the processor access list
* @release: Relinquish a physical processor control
* @handover: Handover a physical processor control to another host
* in the permitted list
* @set_config: Set base configuration of a processor
* @set_control: Setup limited control flags in specific cases
* @get_status: Get the state of physical processor
*
* NOTE: The following paramteres are generic in nature for all these ops,
* -handle: Pointer to TI SCI handle as retrieved by *ti_sci_get_handle
* -pid: Processor ID
* -hid: Host ID
*/
struct ti_sci_proc_ops {
int (*request)(const struct ti_sci_handle *handle, u8 pid);
int (*release)(const struct ti_sci_handle *handle, u8 pid);
int (*handover)(const struct ti_sci_handle *handle, u8 pid, u8 hid);
int (*set_config)(const struct ti_sci_handle *handle, u8 pid,
u64 boot_vector, u32 cfg_set, u32 cfg_clr);
int (*set_control)(const struct ti_sci_handle *handle, u8 pid,
u32 ctrl_set, u32 ctrl_clr);
int (*get_status)(const struct ti_sci_handle *handle, u8 pid,
u64 *boot_vector, u32 *cfg_flags, u32 *ctrl_flags,
u32 *status_flags);
};
/**
* struct ti_sci_ops - Function support for TI SCI
* @dev_ops: Device specific operations
* @clk_ops: Clock specific operations
* @rm_core_ops: Resource management core operations.
* @rm_irq_ops: IRQ management specific operations
* @proc_ops: Processor Control specific operations
*/
struct ti_sci_ops {
struct ti_sci_core_ops core_ops;
@ -469,6 +499,7 @@ struct ti_sci_ops {
struct ti_sci_rm_ringacc_ops rm_ring_ops;
struct ti_sci_rm_psil_ops rm_psil_ops;
struct ti_sci_rm_udmap_ops rm_udmap_ops;
struct ti_sci_proc_ops proc_ops;
};
/**