| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Nishanth Menon | 7692 | 57.51% | 6 | 16.67% |
| Peter Ujfalusi | 1958 | 14.64% | 8 | 22.22% |
| Lokesh Vutla | 1687 | 12.61% | 7 | 19.44% |
| Suman Anna | 1353 | 10.12% | 1 | 2.78% |
| Tero Kristo | 266 | 1.99% | 2 | 5.56% |
| Grygorii Strashko | 241 | 1.80% | 1 | 2.78% |
| Dave Gerlach | 151 | 1.13% | 1 | 2.78% |
| Arnd Bergmann | 5 | 0.04% | 1 | 2.78% |
| Stephen Boyd | 5 | 0.04% | 1 | 2.78% |
| Christophe Jaillet | 5 | 0.04% | 3 | 8.33% |
| Yangtao Li | 4 | 0.03% | 1 | 2.78% |
| Peiwei Hu | 3 | 0.02% | 1 | 2.78% |
| Andrew F. Davis | 2 | 0.01% | 1 | 2.78% |
| Georgi Vlaev | 1 | 0.01% | 1 | 2.78% |
| Helge Deller | 1 | 0.01% | 1 | 2.78% |
| Total | 13374 | 36 |
// SPDX-License-Identifier: GPL-2.0 /* * Texas Instruments System Control Interface Protocol Driver * * Copyright (C) 2015-2022 Texas Instruments Incorporated - https://www.ti.com/ * Nishanth Menon */ #define pr_fmt(fmt) "%s: " fmt, __func__ #include <linux/bitmap.h> #include <linux/debugfs.h> #include <linux/export.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/mailbox_client.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/semaphore.h> #include <linux/slab.h> #include <linux/soc/ti/ti-msgmgr.h> #include <linux/soc/ti/ti_sci_protocol.h> #include <linux/reboot.h> #include "ti_sci.h" /* List of all TI SCI devices active in system */ static LIST_HEAD(ti_sci_list); /* Protection for the entire list */ static DEFINE_MUTEX(ti_sci_list_mutex); /** * struct ti_sci_xfer - Structure representing a message flow * @tx_message: Transmit message * @rx_len: Receive message length * @xfer_buf: Preallocated buffer to store receive message * Since we work with request-ACK protocol, we can * reuse the same buffer for the rx path as we * use for the tx path. * @done: completion event */ struct ti_sci_xfer { struct ti_msgmgr_message tx_message; u8 rx_len; u8 *xfer_buf; struct completion done; }; /** * struct ti_sci_xfers_info - Structure to manage transfer information * @sem_xfer_count: Counting Semaphore for managing max simultaneous * Messages. * @xfer_block: Preallocated Message array * @xfer_alloc_table: Bitmap table for allocated messages. * Index of this bitmap table is also used for message * sequence identifier. * @xfer_lock: Protection for message allocation */ struct ti_sci_xfers_info { struct semaphore sem_xfer_count; struct ti_sci_xfer *xfer_block; unsigned long *xfer_alloc_table; /* protect transfer allocation */ spinlock_t xfer_lock; }; /** * struct ti_sci_desc - Description of SoC integration * @default_host_id: Host identifier representing the compute entity * @max_rx_timeout_ms: Timeout for communication with SoC (in Milliseconds) * @max_msgs: Maximum number of messages that can be pending * simultaneously in the system * @max_msg_size: Maximum size of data per message that can be handled. */ struct ti_sci_desc { u8 default_host_id; int max_rx_timeout_ms; int max_msgs; int max_msg_size; }; /** * struct ti_sci_info - Structure representing a TI SCI instance * @dev: Device pointer * @desc: SoC description for this instance * @nb: Reboot Notifier block * @d: Debugfs file entry * @debug_region: Memory region where the debug message are available * @debug_region_size: Debug region size * @debug_buffer: Buffer allocated to copy debug messages. * @handle: Instance of TI SCI handle to send to clients. * @cl: Mailbox Client * @chan_tx: Transmit mailbox channel * @chan_rx: Receive mailbox channel * @minfo: Message info * @node: list head * @host_id: Host ID * @users: Number of users of this instance * @is_suspending: Flag set to indicate in suspend path. */ struct ti_sci_info { struct device *dev; struct notifier_block nb; const struct ti_sci_desc *desc; struct dentry *d; void __iomem *debug_region; char *debug_buffer; size_t debug_region_size; struct ti_sci_handle handle; struct mbox_client cl; struct mbox_chan *chan_tx; struct mbox_chan *chan_rx; struct ti_sci_xfers_info minfo; struct list_head node; u8 host_id; /* protected by ti_sci_list_mutex */ int users; bool is_suspending; }; #define cl_to_ti_sci_info(c) container_of(c, struct ti_sci_info, cl) #define handle_to_ti_sci_info(h) container_of(h, struct ti_sci_info, handle) #define reboot_to_ti_sci_info(n) container_of(n, struct ti_sci_info, nb) #ifdef CONFIG_DEBUG_FS /** * ti_sci_debug_show() - Helper to dump the debug log * @s: sequence file pointer * @unused: unused. * * Return: 0 */ static int ti_sci_debug_show(struct seq_file *s, void *unused) { struct ti_sci_info *info = s->private; memcpy_fromio(info->debug_buffer, info->debug_region, info->debug_region_size); /* * We don't trust firmware to leave NULL terminated last byte (hence * we have allocated 1 extra 0 byte). Since we cannot guarantee any * specific data format for debug messages, We just present the data * in the buffer as is - we expect the messages to be self explanatory. */ seq_puts(s, info->debug_buffer); return 0; } /* Provide the log file operations interface*/ DEFINE_SHOW_ATTRIBUTE(ti_sci_debug); /** * ti_sci_debugfs_create() - Create log debug file * @pdev: platform device pointer * @info: Pointer to SCI entity information * * Return: 0 if all went fine, else corresponding error. */ static int ti_sci_debugfs_create(struct platform_device *pdev, struct ti_sci_info *info) { struct device *dev = &pdev->dev; struct resource *res; char debug_name[50] = "ti_sci_debug@"; /* Debug region is optional */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "debug_messages"); info->debug_region = devm_ioremap_resource(dev, res); if (IS_ERR(info->debug_region)) return 0; info->debug_region_size = resource_size(res); info->debug_buffer = devm_kcalloc(dev, info->debug_region_size + 1, sizeof(char), GFP_KERNEL); if (!info->debug_buffer) return -ENOMEM; /* Setup NULL termination */ info->debug_buffer[info->debug_region_size] = 0; info->d = debugfs_create_file(strncat(debug_name, dev_name(dev), sizeof(debug_name) - sizeof("ti_sci_debug@")), 0444, NULL, info, &ti_sci_debug_fops); if (IS_ERR(info->d)) return PTR_ERR(info->d); dev_dbg(dev, "Debug region => %p, size = %zu bytes, resource: %pr\n", info->debug_region, info->debug_region_size, res); return 0; } /** * ti_sci_debugfs_destroy() - clean up log debug file * @pdev: platform device pointer * @info: Pointer to SCI entity information */ static void ti_sci_debugfs_destroy(struct platform_device *pdev, struct ti_sci_info *info) { if (IS_ERR(info->debug_region)) return; debugfs_remove(info->d); } #else /* CONFIG_DEBUG_FS */ static inline int ti_sci_debugfs_create(struct platform_device *dev, struct ti_sci_info *info) { return 0; } static inline void ti_sci_debugfs_destroy(struct platform_device *dev, struct ti_sci_info *info) { } #endif /* CONFIG_DEBUG_FS */ /** * ti_sci_dump_header_dbg() - Helper to dump a message header. * @dev: Device pointer corresponding to the SCI entity * @hdr: pointer to header. */ static inline void ti_sci_dump_header_dbg(struct device *dev, struct ti_sci_msg_hdr *hdr) { dev_dbg(dev, "MSGHDR:type=0x%04x host=0x%02x seq=0x%02x flags=0x%08x\n", hdr->type, hdr->host, hdr->seq, hdr->flags); } /** * ti_sci_rx_callback() - mailbox client callback for receive messages * @cl: client pointer * @m: mailbox message * * Processes one received message to appropriate transfer information and * signals completion of the transfer. * * NOTE: This function will be invoked in IRQ context, hence should be * as optimal as possible. */ static void ti_sci_rx_callback(struct mbox_client *cl, void *m) { struct ti_sci_info *info = cl_to_ti_sci_info(cl); struct device *dev = info->dev; struct ti_sci_xfers_info *minfo = &info->minfo; struct ti_msgmgr_message *mbox_msg = m; struct ti_sci_msg_hdr *hdr = (struct ti_sci_msg_hdr *)mbox_msg->buf; struct ti_sci_xfer *xfer; u8 xfer_id; xfer_id = hdr->seq; /* * Are we even expecting this? * NOTE: barriers were implicit in locks used for modifying the bitmap */ if (!test_bit(xfer_id, minfo->xfer_alloc_table)) { dev_err(dev, "Message for %d is not expected!\n", xfer_id); return; } xfer = &minfo->xfer_block[xfer_id]; /* Is the message of valid length? */ if (mbox_msg->len > info->desc->max_msg_size) { dev_err(dev, "Unable to handle %zu xfer(max %d)\n", mbox_msg->len, info->desc->max_msg_size); ti_sci_dump_header_dbg(dev, hdr); return; } if (mbox_msg->len < xfer->rx_len) { dev_err(dev, "Recv xfer %zu < expected %d length\n", mbox_msg->len, xfer->rx_len); ti_sci_dump_header_dbg(dev, hdr); return; } ti_sci_dump_header_dbg(dev, hdr); /* Take a copy to the rx buffer.. */ memcpy(xfer->xfer_buf, mbox_msg->buf, xfer->rx_len); complete(&xfer->done); } /** * ti_sci_get_one_xfer() - Allocate one message * @info: Pointer to SCI entity information * @msg_type: Message type * @msg_flags: Flag to set for the message * @tx_message_size: transmit message size * @rx_message_size: receive message size * * Helper function which is used by various command functions that are * exposed to clients of this driver for allocating a message traffic event. * * This function can sleep depending on pending requests already in the system * for the SCI entity. Further, this also holds a spinlock to maintain integrity * of internal data structures. * * Return: 0 if all went fine, else corresponding error. */ static struct ti_sci_xfer *ti_sci_get_one_xfer(struct ti_sci_info *info, u16 msg_type, u32 msg_flags, size_t tx_message_size, size_t rx_message_size) { struct ti_sci_xfers_info *minfo = &info->minfo; struct ti_sci_xfer *xfer; struct ti_sci_msg_hdr *hdr; unsigned long flags; unsigned long bit_pos; u8 xfer_id; int ret; int timeout; /* Ensure we have sane transfer sizes */ if (rx_message_size > info->desc->max_msg_size || tx_message_size > info->desc->max_msg_size || rx_message_size < sizeof(*hdr) || tx_message_size < sizeof(*hdr)) return ERR_PTR(-ERANGE); /* * Ensure we have only controlled number of pending messages. * Ideally, we might just have to wait a single message, be * conservative and wait 5 times that.. */ timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms) * 5; ret = down_timeout(&minfo->sem_xfer_count, timeout); if (ret < 0) return ERR_PTR(ret); /* Keep the locked section as small as possible */ spin_lock_irqsave(&minfo->xfer_lock, flags); bit_pos = find_first_zero_bit(minfo->xfer_alloc_table, info->desc->max_msgs); set_bit(bit_pos, minfo->xfer_alloc_table); spin_unlock_irqrestore(&minfo->xfer_lock, flags); /* * We already ensured in probe that we can have max messages that can * fit in hdr.seq - NOTE: this improves access latencies * to predictable O(1) access, BUT, it opens us to risk if * remote misbehaves with corrupted message sequence responses. * If that happens, we are going to be messed up anyways.. */ xfer_id = (u8)bit_pos; xfer = &minfo->xfer_block[xfer_id]; hdr = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; xfer->tx_message.len = tx_message_size; xfer->tx_message.chan_rx = info->chan_rx; xfer->tx_message.timeout_rx_ms = info->desc->max_rx_timeout_ms; xfer->rx_len = (u8)rx_message_size; reinit_completion(&xfer->done); hdr->seq = xfer_id; hdr->type = msg_type; hdr->host = info->host_id; hdr->flags = msg_flags; return xfer; } /** * ti_sci_put_one_xfer() - Release a message * @minfo: transfer info pointer * @xfer: message that was reserved by ti_sci_get_one_xfer * * This holds a spinlock to maintain integrity of internal data structures. */ static void ti_sci_put_one_xfer(struct ti_sci_xfers_info *minfo, struct ti_sci_xfer *xfer) { unsigned long flags; struct ti_sci_msg_hdr *hdr; u8 xfer_id; hdr = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; xfer_id = hdr->seq; /* * Keep the locked section as small as possible * NOTE: we might escape with smp_mb and no lock here.. * but just be conservative and symmetric. */ spin_lock_irqsave(&minfo->xfer_lock, flags); clear_bit(xfer_id, minfo->xfer_alloc_table); spin_unlock_irqrestore(&minfo->xfer_lock, flags); /* Increment the count for the next user to get through */ up(&minfo->sem_xfer_count); } /** * ti_sci_do_xfer() - Do one transfer * @info: Pointer to SCI entity information * @xfer: Transfer to initiate and wait for response * * Return: -ETIMEDOUT in case of no response, if transmit error, * return corresponding error, else if all goes well, * return 0. */ static inline int ti_sci_do_xfer(struct ti_sci_info *info, struct ti_sci_xfer *xfer) { int ret; int timeout; struct device *dev = info->dev; bool done_state = true; ret = mbox_send_message(info->chan_tx, &xfer->tx_message); if (ret < 0) return ret; ret = 0; if (!info->is_suspending) { /* And we wait for the response. */ timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms); if (!wait_for_completion_timeout(&xfer->done, timeout)) ret = -ETIMEDOUT; } else { /* * If we are suspending, we cannot use wait_for_completion_timeout * during noirq phase, so we must manually poll the completion. */ ret = read_poll_timeout_atomic(try_wait_for_completion, done_state, done_state, 1, info->desc->max_rx_timeout_ms * 1000, false, &xfer->done); } if (ret == -ETIMEDOUT) dev_err(dev, "Mbox timedout in resp(caller: %pS)\n", (void *)_RET_IP_); /* * NOTE: we might prefer not to need the mailbox ticker to manage the * transfer queueing since the protocol layer queues things by itself. * Unfortunately, we have to kick the mailbox framework after we have * received our message. */ mbox_client_txdone(info->chan_tx, ret); return ret; } /** * ti_sci_cmd_get_revision() - command to get the revision of the SCI entity * @info: Pointer to SCI entity information * * Updates the SCI information in the internal data structure. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_get_revision(struct ti_sci_info *info) { struct device *dev = info->dev; struct ti_sci_handle *handle = &info->handle; struct ti_sci_version_info *ver = &handle->version; struct ti_sci_msg_resp_version *rev_info; struct ti_sci_xfer *xfer; int ret; xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_VERSION, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, sizeof(struct ti_sci_msg_hdr), sizeof(*rev_info)); if (IS_ERR(xfer)) { ret = PTR_ERR(xfer); dev_err(dev, "Message alloc failed(%d)\n", ret); return ret; } rev_info = (struct ti_sci_msg_resp_version *)xfer->xfer_buf; ret = ti_sci_do_xfer(info, xfer); if (ret) { dev_err(dev, "Mbox send fail %d\n", ret); goto fail; } ver->abi_major = rev_info->abi_major; ver->abi_minor = rev_info->abi_minor; ver->firmware_revision = rev_info->firmware_revision; strncpy(ver->firmware_description, rev_info->firmware_description, sizeof(ver->firmware_description)); fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_is_response_ack() - Generic ACK/NACK message checkup * @r: pointer to response buffer * * Return: true if the response was an ACK, else returns false. */ static inline bool ti_sci_is_response_ack(void *r) { struct ti_sci_msg_hdr *hdr = r; return hdr->flags & TI_SCI_FLAG_RESP_GENERIC_ACK ? true : false; } /** * ti_sci_set_device_state() - Set device state helper * @handle: pointer to TI SCI handle * @id: Device identifier * @flags: flags to setup for the device * @state: State to move the device to * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_set_device_state(const struct ti_sci_handle *handle, u32 id, u32 flags, u8 state) { struct ti_sci_info *info; struct ti_sci_msg_req_set_device_state *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_SET_DEVICE_STATE, flags | 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_device_state *)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; ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_get_device_state() - Get device state helper * @handle: Handle to the device * @id: Device Identifier * @clcnt: Pointer to Context Loss Count * @resets: pointer to resets * @p_state: pointer to p_state * @c_state: pointer to c_state * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_get_device_state(const struct ti_sci_handle *handle, u32 id, u32 *clcnt, u32 *resets, u8 *p_state, u8 *c_state) { struct ti_sci_info *info; struct ti_sci_msg_req_get_device_state *req; struct ti_sci_msg_resp_get_device_state *resp; struct ti_sci_xfer *xfer; struct device *dev; int ret = 0; if (IS_ERR(handle)) return PTR_ERR(handle); if (!handle) return -EINVAL; if (!clcnt && !resets && !p_state && !c_state) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_DEVICE_STATE, 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_device_state *)xfer->xfer_buf; req->id = 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_device_state *)xfer->xfer_buf; if (!ti_sci_is_response_ack(resp)) { ret = -ENODEV; goto fail; } if (clcnt) *clcnt = resp->context_loss_count; if (resets) *resets = resp->resets; if (p_state) *p_state = resp->programmed_state; if (c_state) *c_state = resp->current_state; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_get_device() - command to request for device managed by TISCI * that can be shared with other hosts. * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle * @id: Device Identifier * * Request for the device - NOTE: the client MUST maintain integrity of * usage count by balancing get_device with put_device. No refcounting is * managed by driver for that purpose. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_get_device(const struct ti_sci_handle *handle, u32 id) { return ti_sci_set_device_state(handle, id, 0, MSG_DEVICE_SW_STATE_ON); } /** * ti_sci_cmd_get_device_exclusive() - command to request for device managed by * TISCI that is exclusively owned by the * requesting host. * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle * @id: Device Identifier * * Request for the device - NOTE: the client MUST maintain integrity of * usage count by balancing get_device with put_device. No refcounting is * managed by driver for that purpose. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_get_device_exclusive(const struct ti_sci_handle *handle, u32 id) { return ti_sci_set_device_state(handle, id, MSG_FLAG_DEVICE_EXCLUSIVE, MSG_DEVICE_SW_STATE_ON); } /** * ti_sci_cmd_idle_device() - Command to idle a device managed by TISCI * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle * @id: Device Identifier * * Request for the device - NOTE: the client MUST maintain integrity of * usage count by balancing get_device with put_device. No refcounting is * managed by driver for that purpose. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_idle_device(const struct ti_sci_handle *handle, u32 id) { return ti_sci_set_device_state(handle, id, 0, MSG_DEVICE_SW_STATE_RETENTION); } /** * ti_sci_cmd_idle_device_exclusive() - Command to idle a device managed by * TISCI that is exclusively owned by * requesting host. * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle * @id: Device Identifier * * Request for the device - NOTE: the client MUST maintain integrity of * usage count by balancing get_device with put_device. No refcounting is * managed by driver for that purpose. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_idle_device_exclusive(const struct ti_sci_handle *handle, u32 id) { return ti_sci_set_device_state(handle, id, MSG_FLAG_DEVICE_EXCLUSIVE, MSG_DEVICE_SW_STATE_RETENTION); } /** * ti_sci_cmd_put_device() - command to release a device managed by TISCI * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle * @id: Device Identifier * * Request for the device - NOTE: the client MUST maintain integrity of * usage count by balancing get_device with put_device. No refcounting is * managed by driver for that purpose. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_put_device(const struct ti_sci_handle *handle, u32 id) { return ti_sci_set_device_state(handle, id, 0, MSG_DEVICE_SW_STATE_AUTO_OFF); } /** * ti_sci_cmd_dev_is_valid() - Is the device valid * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle * @id: Device Identifier * * Return: 0 if all went fine and the device ID is valid, else return * appropriate error. */ static int ti_sci_cmd_dev_is_valid(const struct ti_sci_handle *handle, u32 id) { u8 unused; /* check the device state which will also tell us if the ID is valid */ return ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &unused); } /** * ti_sci_cmd_dev_get_clcnt() - Get context loss counter * @handle: Pointer to TISCI handle * @id: Device Identifier * @count: Pointer to Context Loss counter to populate * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_dev_get_clcnt(const struct ti_sci_handle *handle, u32 id, u32 *count) { return ti_sci_get_device_state(handle, id, count, NULL, NULL, NULL); } /** * ti_sci_cmd_dev_is_idle() - Check if the device is requested to be idle * @handle: Pointer to TISCI handle * @id: Device Identifier * @r_state: true if requested to be idle * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_dev_is_idle(const struct ti_sci_handle *handle, u32 id, bool *r_state) { int ret; u8 state; if (!r_state) return -EINVAL; ret = ti_sci_get_device_state(handle, id, NULL, NULL, &state, NULL); if (ret) return ret; *r_state = (state == MSG_DEVICE_SW_STATE_RETENTION); return 0; } /** * ti_sci_cmd_dev_is_stop() - Check if the device is requested to be stopped * @handle: Pointer to TISCI handle * @id: Device Identifier * @r_state: true if requested to be stopped * @curr_state: true if currently stopped. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_dev_is_stop(const struct ti_sci_handle *handle, u32 id, bool *r_state, bool *curr_state) { int ret; u8 p_state, c_state; if (!r_state && !curr_state) return -EINVAL; ret = ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state); if (ret) return ret; if (r_state) *r_state = (p_state == MSG_DEVICE_SW_STATE_AUTO_OFF); if (curr_state) *curr_state = (c_state == MSG_DEVICE_HW_STATE_OFF); return 0; } /** * ti_sci_cmd_dev_is_on() - Check if the device is requested to be ON * @handle: Pointer to TISCI handle * @id: Device Identifier * @r_state: true if requested to be ON * @curr_state: true if currently ON and active * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_dev_is_on(const struct ti_sci_handle *handle, u32 id, bool *r_state, bool *curr_state) { int ret; u8 p_state, c_state; if (!r_state && !curr_state) return -EINVAL; ret = ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state); if (ret) return ret; if (r_state) *r_state = (p_state == MSG_DEVICE_SW_STATE_ON); if (curr_state) *curr_state = (c_state == MSG_DEVICE_HW_STATE_ON); return 0; } /** * ti_sci_cmd_dev_is_trans() - Check if the device is currently transitioning * @handle: Pointer to TISCI handle * @id: Device Identifier * @curr_state: true if currently transitioning. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_dev_is_trans(const struct ti_sci_handle *handle, u32 id, bool *curr_state) { int ret; u8 state; if (!curr_state) return -EINVAL; ret = ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &state); if (ret) return ret; *curr_state = (state == MSG_DEVICE_HW_STATE_TRANS); return 0; } /** * ti_sci_cmd_set_device_resets() - command to set resets for device managed * by TISCI * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle * @id: Device Identifier * @reset_state: Device specific reset bit field * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_set_device_resets(const struct ti_sci_handle *handle, u32 id, u32 reset_state) { struct ti_sci_info *info; struct ti_sci_msg_req_set_device_resets *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_SET_DEVICE_RESETS, 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_device_resets *)xfer->xfer_buf; req->id = id; req->resets = reset_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; ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_get_device_resets() - Get reset state for device managed * by TISCI * @handle: Pointer to TISCI handle * @id: Device Identifier * @reset_state: Pointer to reset state to populate * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_get_device_resets(const struct ti_sci_handle *handle, u32 id, u32 *reset_state) { return ti_sci_get_device_state(handle, id, NULL, reset_state, NULL, NULL); } /** * ti_sci_set_clock_state() - Set clock state helper * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @flags: Header flags as needed * @state: State to request for the clock. * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_set_clock_state(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, u32 flags, u8 state) { struct ti_sci_info *info; struct ti_sci_msg_req_set_clock_state *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_SET_CLOCK_STATE, flags | 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_clock_state *)xfer->xfer_buf; req->dev_id = dev_id; if (clk_id < 255) { req->clk_id = clk_id; } else { req->clk_id = 255; req->clk_id_32 = clk_id; } req->request_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; ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_get_clock_state() - Get clock state helper * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @programmed_state: State requested for clock to move to * @current_state: State that the clock is currently in * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_get_clock_state(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, u8 *programmed_state, u8 *current_state) { struct ti_sci_info *info; struct ti_sci_msg_req_get_clock_state *req; struct ti_sci_msg_resp_get_clock_state *resp; struct ti_sci_xfer *xfer; struct device *dev; int ret = 0; if (IS_ERR(handle)) return PTR_ERR(handle); if (!handle) return -EINVAL; if (!programmed_state && !current_state) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_STATE, 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_clock_state *)xfer->xfer_buf; req->dev_id = dev_id; if (clk_id < 255) { req->clk_id = clk_id; } else { req->clk_id = 255; req->clk_id_32 = clk_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_clock_state *)xfer->xfer_buf; if (!ti_sci_is_response_ack(resp)) { ret = -ENODEV; goto fail; } if (programmed_state) *programmed_state = resp->programmed_state; if (current_state) *current_state = resp->current_state; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_get_clock() - Get control of a clock from TI SCI * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @needs_ssc: 'true' if Spread Spectrum clock is desired, else 'false' * @can_change_freq: 'true' if frequency change is desired, else 'false' * @enable_input_term: 'true' if input termination is desired, else 'false' * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_get_clock(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, bool needs_ssc, bool can_change_freq, bool enable_input_term) { u32 flags = 0; flags |= needs_ssc ? MSG_FLAG_CLOCK_ALLOW_SSC : 0; flags |= can_change_freq ? MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE : 0; flags |= enable_input_term ? MSG_FLAG_CLOCK_INPUT_TERM : 0; return ti_sci_set_clock_state(handle, dev_id, clk_id, flags, MSG_CLOCK_SW_STATE_REQ); } /** * ti_sci_cmd_idle_clock() - Idle a clock which is in our control * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * * NOTE: This clock must have been requested by get_clock previously. * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_idle_clock(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id) { return ti_sci_set_clock_state(handle, dev_id, clk_id, MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE, MSG_CLOCK_SW_STATE_UNREQ); } /** * ti_sci_cmd_put_clock() - Release a clock from our control back to TISCI * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * * NOTE: This clock must have been requested by get_clock previously. * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_put_clock(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id) { return ti_sci_set_clock_state(handle, dev_id, clk_id, MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE, MSG_CLOCK_SW_STATE_AUTO); } /** * ti_sci_cmd_clk_is_auto() - Is the clock being auto managed * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @req_state: state indicating if the clock is auto managed * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_clk_is_auto(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, bool *req_state) { u8 state = 0; int ret; if (!req_state) return -EINVAL; ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, &state, NULL); if (ret) return ret; *req_state = (state == MSG_CLOCK_SW_STATE_AUTO); return 0; } /** * ti_sci_cmd_clk_is_on() - Is the clock ON * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @req_state: state indicating if the clock is managed by us and enabled * @curr_state: state indicating if the clock is ready for operation * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_clk_is_on(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, bool *req_state, bool *curr_state) { u8 c_state = 0, r_state = 0; int ret; if (!req_state && !curr_state) return -EINVAL; ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, &r_state, &c_state); if (ret) return ret; if (req_state) *req_state = (r_state == MSG_CLOCK_SW_STATE_REQ); if (curr_state) *curr_state = (c_state == MSG_CLOCK_HW_STATE_READY); return 0; } /** * ti_sci_cmd_clk_is_off() - Is the clock OFF * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @req_state: state indicating if the clock is managed by us and disabled * @curr_state: state indicating if the clock is NOT ready for operation * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_clk_is_off(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, bool *req_state, bool *curr_state) { u8 c_state = 0, r_state = 0; int ret; if (!req_state && !curr_state) return -EINVAL; ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, &r_state, &c_state); if (ret) return ret; if (req_state) *req_state = (r_state == MSG_CLOCK_SW_STATE_UNREQ); if (curr_state) *curr_state = (c_state == MSG_CLOCK_HW_STATE_NOT_READY); return 0; } /** * ti_sci_cmd_clk_set_parent() - Set the clock source of a specific device clock * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @parent_id: Parent clock identifier to set * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_clk_set_parent(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, u32 parent_id) { struct ti_sci_info *info; struct ti_sci_msg_req_set_clock_parent *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_SET_CLOCK_PARENT, 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_clock_parent *)xfer->xfer_buf; req->dev_id = dev_id; if (clk_id < 255) { req->clk_id = clk_id; } else { req->clk_id = 255; req->clk_id_32 = clk_id; } if (parent_id < 255) { req->parent_id = parent_id; } else { req->parent_id = 255; req->parent_id_32 = parent_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->xfer_buf; ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_clk_get_parent() - Get current parent clock source * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @parent_id: Current clock parent * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_clk_get_parent(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, u32 *parent_id) { struct ti_sci_info *info; struct ti_sci_msg_req_get_clock_parent *req; struct ti_sci_msg_resp_get_clock_parent *resp; struct ti_sci_xfer *xfer; struct device *dev; int ret = 0; if (IS_ERR(handle)) return PTR_ERR(handle); if (!handle || !parent_id) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_PARENT, 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_clock_parent *)xfer->xfer_buf; req->dev_id = dev_id; if (clk_id < 255) { req->clk_id = clk_id; } else { req->clk_id = 255; req->clk_id_32 = clk_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_clock_parent *)xfer->xfer_buf; if (!ti_sci_is_response_ack(resp)) { ret = -ENODEV; } else { if (resp->parent_id < 255) *parent_id = resp->parent_id; else *parent_id = resp->parent_id_32; } fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_clk_get_num_parents() - Get num parents of the current clk source * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @num_parents: Returns he number of parents to the current clock. * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_clk_get_num_parents(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, u32 *num_parents) { struct ti_sci_info *info; struct ti_sci_msg_req_get_clock_num_parents *req; struct ti_sci_msg_resp_get_clock_num_parents *resp; struct ti_sci_xfer *xfer; struct device *dev; int ret = 0; if (IS_ERR(handle)) return PTR_ERR(handle); if (!handle || !num_parents) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_NUM_CLOCK_PARENTS, 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_clock_num_parents *)xfer->xfer_buf; req->dev_id = dev_id; if (clk_id < 255) { req->clk_id = clk_id; } else { req->clk_id = 255; req->clk_id_32 = clk_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_clock_num_parents *)xfer->xfer_buf; if (!ti_sci_is_response_ack(resp)) { ret = -ENODEV; } else { if (resp->num_parents < 255) *num_parents = resp->num_parents; else *num_parents = resp->num_parents_32; } fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_clk_get_match_freq() - Find a good match for frequency * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @min_freq: The minimum allowable frequency in Hz. This is the minimum * allowable programmed frequency and does not account for clock * tolerances and jitter. * @target_freq: The target clock frequency in Hz. A frequency will be * processed as close to this target frequency as possible. * @max_freq: The maximum allowable frequency in Hz. This is the maximum * allowable programmed frequency and does not account for clock * tolerances and jitter. * @match_freq: Frequency match in Hz response. * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_clk_get_match_freq(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, u64 min_freq, u64 target_freq, u64 max_freq, u64 *match_freq) { struct ti_sci_info *info; struct ti_sci_msg_req_query_clock_freq *req; struct ti_sci_msg_resp_query_clock_freq *resp; struct ti_sci_xfer *xfer; struct device *dev; int ret = 0; if (IS_ERR(handle)) return PTR_ERR(handle); if (!handle || !match_freq) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_QUERY_CLOCK_FREQ, 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_query_clock_freq *)xfer->xfer_buf; req->dev_id = dev_id; if (clk_id < 255) { req->clk_id = clk_id; } else { req->clk_id = 255; req->clk_id_32 = clk_id; } req->min_freq_hz = min_freq; req->target_freq_hz = target_freq; req->max_freq_hz = max_freq; 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_query_clock_freq *)xfer->xfer_buf; if (!ti_sci_is_response_ack(resp)) ret = -ENODEV; else *match_freq = resp->freq_hz; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_clk_set_freq() - Set a frequency for clock * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @min_freq: The minimum allowable frequency in Hz. This is the minimum * allowable programmed frequency and does not account for clock * tolerances and jitter. * @target_freq: The target clock frequency in Hz. A frequency will be * processed as close to this target frequency as possible. * @max_freq: The maximum allowable frequency in Hz. This is the maximum * allowable programmed frequency and does not account for clock * tolerances and jitter. * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_clk_set_freq(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, u64 min_freq, u64 target_freq, u64 max_freq) { struct ti_sci_info *info; struct ti_sci_msg_req_set_clock_freq *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_SET_CLOCK_FREQ, 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_clock_freq *)xfer->xfer_buf; req->dev_id = dev_id; if (clk_id < 255) { req->clk_id = clk_id; } else { req->clk_id = 255; req->clk_id_32 = clk_id; } req->min_freq_hz = min_freq; req->target_freq_hz = target_freq; req->max_freq_hz = max_freq; 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; ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_clk_get_freq() - Get current frequency * @handle: pointer to TI SCI handle * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has it's own set of clock inputs. This indexes * which clock input to modify. * @freq: Currently frequency in Hz * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_clk_get_freq(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id, u64 *freq) { struct ti_sci_info *info; struct ti_sci_msg_req_get_clock_freq *req; struct ti_sci_msg_resp_get_clock_freq *resp; struct ti_sci_xfer *xfer; struct device *dev; int ret = 0; if (IS_ERR(handle)) return PTR_ERR(handle); if (!handle || !freq) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_FREQ, 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_clock_freq *)xfer->xfer_buf; req->dev_id = dev_id; if (clk_id < 255) { req->clk_id = clk_id; } else { req->clk_id = 255; req->clk_id_32 = clk_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_clock_freq *)xfer->xfer_buf; if (!ti_sci_is_response_ack(resp)) ret = -ENODEV; else *freq = resp->freq_hz; 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; struct ti_sci_msg_req_reboot *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_SYS_RESET, 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_reboot *)xfer->xfer_buf; 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)) ret = -ENODEV; else ret = 0; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_get_resource_range - Helper to get a range of resources assigned * to a host. Resource is uniquely identified by * type and subtype. * @handle: Pointer to TISCI handle. * @dev_id: TISCI device ID. * @subtype: Resource assignment subtype that is being requested * from the given device. * @s_host: Host processor ID to which the resources are allocated * @desc: Pointer to ti_sci_resource_desc to be updated with the * resource range start index and number of resources * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_get_resource_range(const struct ti_sci_handle *handle, u32 dev_id, u8 subtype, u8 s_host, struct ti_sci_resource_desc *desc) { struct ti_sci_msg_resp_get_resource_range *resp; struct ti_sci_msg_req_get_resource_range *req; struct ti_sci_xfer *xfer; struct ti_sci_info *info; struct device *dev; int ret = 0; if (IS_ERR(handle)) return PTR_ERR(handle); if (!handle || !desc) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_RESOURCE_RANGE, 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_resource_range *)xfer->xfer_buf; req->secondary_host = s_host; req->type = dev_id & MSG_RM_RESOURCE_TYPE_MASK; req->subtype = subtype & MSG_RM_RESOURCE_SUBTYPE_MASK; 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_resource_range *)xfer->xfer_buf; if (!ti_sci_is_response_ack(resp)) { ret = -ENODEV; } else if (!resp->range_num && !resp->range_num_sec) { /* Neither of the two resource range is valid */ ret = -ENODEV; } else { desc->start = resp->range_start; desc->num = resp->range_num; desc->start_sec = resp->range_start_sec; desc->num_sec = resp->range_num_sec; } fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_get_resource_range - Get a range of resources assigned to host * that is same as ti sci interface host. * @handle: Pointer to TISCI handle. * @dev_id: TISCI device ID. * @subtype: Resource assignment subtype that is being requested * from the given device. * @desc: Pointer to ti_sci_resource_desc to be updated with the * resource range start index and number of resources * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_get_resource_range(const struct ti_sci_handle *handle, u32 dev_id, u8 subtype, struct ti_sci_resource_desc *desc) { return ti_sci_get_resource_range(handle, dev_id, subtype, TI_SCI_IRQ_SECONDARY_HOST_INVALID, desc); } /** * ti_sci_cmd_get_resource_range_from_shost - Get a range of resources * assigned to a specified host. * @handle: Pointer to TISCI handle. * @dev_id: TISCI device ID. * @subtype: Resource assignment subtype that is being requested * from the given device. * @s_host: Host processor ID to which the resources are allocated * @desc: Pointer to ti_sci_resource_desc to be updated with the * resource range start index and number of resources * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_get_resource_range_from_shost(const struct ti_sci_handle *handle, u32 dev_id, u8 subtype, u8 s_host, struct ti_sci_resource_desc *desc) { return ti_sci_get_resource_range(handle, dev_id, subtype, s_host, desc); } /** * ti_sci_manage_irq() - Helper api to configure/release the irq route between * the requested source and destination * @handle: Pointer to TISCI handle. * @valid_params: Bit fields defining the validity of certain params * @src_id: Device ID of the IRQ source * @src_index: IRQ source index within the source device * @dst_id: Device ID of the IRQ destination * @dst_host_irq: IRQ number of the destination device * @ia_id: Device ID of the IA, if the IRQ flows through this IA * @vint: Virtual interrupt to be used within the IA * @global_event: Global event number to be used for the requesting event * @vint_status_bit: Virtual interrupt status bit to be used for the event * @s_host: Secondary host ID to which the irq/event is being * requested for. * @type: Request type irq set or release. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_manage_irq(const struct ti_sci_handle *handle, u32 valid_params, u16 src_id, u16 src_index, u16 dst_id, u16 dst_host_irq, u16 ia_id, u16 vint, u16 global_event, u8 vint_status_bit, u8 s_host, u16 type) { struct ti_sci_msg_req_manage_irq *req; struct ti_sci_msg_hdr *resp; struct ti_sci_xfer *xfer; struct ti_sci_info *info; 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, type, 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_manage_irq *)xfer->xfer_buf; req->valid_params = valid_params; req->src_id = src_id; req->src_index = src_index; req->dst_id = dst_id; req->dst_host_irq = dst_host_irq; req->ia_id = ia_id; req->vint = vint; req->global_event = global_event; req->vint_status_bit = vint_status_bit; req->secondary_host = s_host; 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; ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_set_irq() - Helper api to configure the irq route between the * requested source and destination * @handle: Pointer to TISCI handle. * @valid_params: Bit fields defining the validity of certain params * @src_id: Device ID of the IRQ source * @src_index: IRQ source index within the source device * @dst_id: Device ID of the IRQ destination * @dst_host_irq: IRQ number of the destination device * @ia_id: Device ID of the IA, if the IRQ flows through this IA * @vint: Virtual interrupt to be used within the IA * @global_event: Global event number to be used for the requesting event * @vint_status_bit: Virtual interrupt status bit to be used for the event * @s_host: Secondary host ID to which the irq/event is being * requested for. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_set_irq(const struct ti_sci_handle *handle, u32 valid_params, u16 src_id, u16 src_index, u16 dst_id, u16 dst_host_irq, u16 ia_id, u16 vint, u16 global_event, u8 vint_status_bit, u8 s_host) { pr_debug("%s: IRQ set with valid_params = 0x%x from src = %d, index = %d, to dst = %d, irq = %d,via ia_id = %d, vint = %d, global event = %d,status_bit = %d\n", __func__, valid_params, src_id, src_index, dst_id, dst_host_irq, ia_id, vint, global_event, vint_status_bit); return ti_sci_manage_irq(handle, valid_params, src_id, src_index, dst_id, dst_host_irq, ia_id, vint, global_event, vint_status_bit, s_host, TI_SCI_MSG_SET_IRQ); } /** * ti_sci_free_irq() - Helper api to free the irq route between the * requested source and destination * @handle: Pointer to TISCI handle. * @valid_params: Bit fields defining the validity of certain params * @src_id: Device ID of the IRQ source * @src_index: IRQ source index within the source device * @dst_id: Device ID of the IRQ destination * @dst_host_irq: IRQ number of the destination device * @ia_id: Device ID of the IA, if the IRQ flows through this IA * @vint: Virtual interrupt to be used within the IA * @global_event: Global event number to be used for the requesting event * @vint_status_bit: Virtual interrupt status bit to be used for the event * @s_host: Secondary host ID to which the irq/event is being * requested for. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_free_irq(const struct ti_sci_handle *handle, u32 valid_params, u16 src_id, u16 src_index, u16 dst_id, u16 dst_host_irq, u16 ia_id, u16 vint, u16 global_event, u8 vint_status_bit, u8 s_host) { pr_debug("%s: IRQ release with valid_params = 0x%x from src = %d, index = %d, to dst = %d, irq = %d,via ia_id = %d, vint = %d, global event = %d,status_bit = %d\n", __func__, valid_params, src_id, src_index, dst_id, dst_host_irq, ia_id, vint, global_event, vint_status_bit); return ti_sci_manage_irq(handle, valid_params, src_id, src_index, dst_id, dst_host_irq, ia_id, vint, global_event, vint_status_bit, s_host, TI_SCI_MSG_FREE_IRQ); } /** * ti_sci_cmd_set_irq() - Configure a host irq route between the requested * source and destination. * @handle: Pointer to TISCI handle. * @src_id: Device ID of the IRQ source * @src_index: IRQ source index within the source device * @dst_id: Device ID of the IRQ destination * @dst_host_irq: IRQ number of the destination device * @vint_irq: Boolean specifying if this interrupt belongs to * Interrupt Aggregator. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_set_irq(const struct ti_sci_handle *handle, u16 src_id, u16 src_index, u16 dst_id, u16 dst_host_irq) { u32 valid_params = MSG_FLAG_DST_ID_VALID | MSG_FLAG_DST_HOST_IRQ_VALID; return ti_sci_set_irq(handle, valid_params, src_id, src_index, dst_id, dst_host_irq, 0, 0, 0, 0, 0); } /** * ti_sci_cmd_set_event_map() - Configure an event based irq route between the * requested source and Interrupt Aggregator. * @handle: Pointer to TISCI handle. * @src_id: Device ID of the IRQ source * @src_index: IRQ source index within the source device * @ia_id: Device ID of the IA, if the IRQ flows through this IA * @vint: Virtual interrupt to be used within the IA * @global_event: Global event number to be used for the requesting event * @vint_status_bit: Virtual interrupt status bit to be used for the event * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_set_event_map(const struct ti_sci_handle *handle, u16 src_id, u16 src_index, u16 ia_id, u16 vint, u16 global_event, u8 vint_status_bit) { u32 valid_params = MSG_FLAG_IA_ID_VALID | MSG_FLAG_VINT_VALID | MSG_FLAG_GLB_EVNT_VALID | MSG_FLAG_VINT_STS_BIT_VALID; return ti_sci_set_irq(handle, valid_params, src_id, src_index, 0, 0, ia_id, vint, global_event, vint_status_bit, 0); } /** * ti_sci_cmd_free_irq() - Free a host irq route between the between the * requested source and destination. * @handle: Pointer to TISCI handle. * @src_id: Device ID of the IRQ source * @src_index: IRQ source index within the source device * @dst_id: Device ID of the IRQ destination * @dst_host_irq: IRQ number of the destination device * @vint_irq: Boolean specifying if this interrupt belongs to * Interrupt Aggregator. * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_free_irq(const struct ti_sci_handle *handle, u16 src_id, u16 src_index, u16 dst_id, u16 dst_host_irq) { u32 valid_params = MSG_FLAG_DST_ID_VALID | MSG_FLAG_DST_HOST_IRQ_VALID; return ti_sci_free_irq(handle, valid_params, src_id, src_index, dst_id, dst_host_irq, 0, 0, 0, 0, 0); } /** * ti_sci_cmd_free_event_map() - Free an event map between the requested source * and Interrupt Aggregator. * @handle: Pointer to TISCI handle. * @src_id: Device ID of the IRQ source * @src_index: IRQ source index within the source device * @ia_id: Device ID of the IA, if the IRQ flows through this IA * @vint: Virtual interrupt to be used within the IA * @global_event: Global event number to be used for the requesting event * @vint_status_bit: Virtual interrupt status bit to be used for the event * * Return: 0 if all went fine, else return appropriate error. */ static int ti_sci_cmd_free_event_map(const struct ti_sci_handle *handle, u16 src_id, u16 src_index, u16 ia_id, u16 vint, u16 global_event, u8 vint_status_bit) { u32 valid_params = MSG_FLAG_IA_ID_VALID | MSG_FLAG_VINT_VALID | MSG_FLAG_GLB_EVNT_VALID | MSG_FLAG_VINT_STS_BIT_VALID; return ti_sci_free_irq(handle, valid_params, src_id, src_index, 0, 0, ia_id, vint, global_event, vint_status_bit, 0); } /** * ti_sci_cmd_rm_ring_cfg() - Configure a NAVSS ring * @handle: Pointer to TI SCI handle. * @params: Pointer to ti_sci_msg_rm_ring_cfg ring config structure * * Return: 0 if all went well, else returns appropriate error value. * * See @ti_sci_msg_rm_ring_cfg and @ti_sci_msg_rm_ring_cfg_req for * more info. */ static int ti_sci_cmd_rm_ring_cfg(const struct ti_sci_handle *handle, const struct ti_sci_msg_rm_ring_cfg *params) { struct ti_sci_msg_rm_ring_cfg_req *req; struct ti_sci_msg_hdr *resp; struct ti_sci_xfer *xfer; struct ti_sci_info *info; struct device *dev; int ret = 0; if (IS_ERR_OR_NULL(handle)) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_RM_RING_CFG, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, sizeof(*req), sizeof(*resp)); if (IS_ERR(xfer)) { ret = PTR_ERR(xfer); dev_err(dev, "RM_RA:Message config failed(%d)\n", ret); return ret; } req = (struct ti_sci_msg_rm_ring_cfg_req *)xfer->xfer_buf; req->valid_params = params->valid_params; req->nav_id = params->nav_id; req->index = params->index; req->addr_lo = params->addr_lo; req->addr_hi = params->addr_hi; req->count = params->count; req->mode = params->mode; req->size = params->size; req->order_id = params->order_id; req->virtid = params->virtid; req->asel = params->asel; ret = ti_sci_do_xfer(info, xfer); if (ret) { dev_err(dev, "RM_RA:Mbox config send fail %d\n", ret); goto fail; } resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; fail: ti_sci_put_one_xfer(&info->minfo, xfer); dev_dbg(dev, "RM_RA:config ring %u ret:%d\n", params->index, ret); return ret; } /** * ti_sci_cmd_rm_psil_pair() - Pair PSI-L source to destination thread * @handle: Pointer to TI SCI handle. * @nav_id: Device ID of Navigator Subsystem which should be used for * pairing * @src_thread: Source PSI-L thread ID * @dst_thread: Destination PSI-L thread ID * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_rm_psil_pair(const struct ti_sci_handle *handle, u32 nav_id, u32 src_thread, u32 dst_thread) { struct ti_sci_msg_psil_pair *req; struct ti_sci_msg_hdr *resp; struct ti_sci_xfer *xfer; struct ti_sci_info *info; 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_RM_PSIL_PAIR, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, sizeof(*req), sizeof(*resp)); if (IS_ERR(xfer)) { ret = PTR_ERR(xfer); dev_err(dev, "RM_PSIL:Message reconfig failed(%d)\n", ret); return ret; } req = (struct ti_sci_msg_psil_pair *)xfer->xfer_buf; req->nav_id = nav_id; req->src_thread = src_thread; req->dst_thread = dst_thread; ret = ti_sci_do_xfer(info, xfer); if (ret) { dev_err(dev, "RM_PSIL:Mbox send fail %d\n", ret); goto fail; } resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_rm_psil_unpair() - Unpair PSI-L source from destination thread * @handle: Pointer to TI SCI handle. * @nav_id: Device ID of Navigator Subsystem which should be used for * unpairing * @src_thread: Source PSI-L thread ID * @dst_thread: Destination PSI-L thread ID * * Return: 0 if all went well, else returns appropriate error value. */ static int ti_sci_cmd_rm_psil_unpair(const struct ti_sci_handle *handle, u32 nav_id, u32 src_thread, u32 dst_thread) { struct ti_sci_msg_psil_unpair *req; struct ti_sci_msg_hdr *resp; struct ti_sci_xfer *xfer; struct ti_sci_info *info; 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_RM_PSIL_UNPAIR, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, sizeof(*req), sizeof(*resp)); if (IS_ERR(xfer)) { ret = PTR_ERR(xfer); dev_err(dev, "RM_PSIL:Message reconfig failed(%d)\n", ret); return ret; } req = (struct ti_sci_msg_psil_unpair *)xfer->xfer_buf; req->nav_id = nav_id; req->src_thread = src_thread; req->dst_thread = dst_thread; ret = ti_sci_do_xfer(info, xfer); if (ret) { dev_err(dev, "RM_PSIL:Mbox send fail %d\n", ret); goto fail; } resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; fail: ti_sci_put_one_xfer(&info->minfo, xfer); return ret; } /** * ti_sci_cmd_rm_udmap_tx_ch_cfg() - Configure a UDMAP TX channel * @handle: Pointer to TI SCI handle. * @params: Pointer to ti_sci_msg_rm_udmap_tx_ch_cfg TX channel config * structure * * Return: 0 if all went well, else returns appropriate error value. * * See @ti_sci_msg_rm_udmap_tx_ch_cfg and @ti_sci_msg_rm_udmap_tx_ch_cfg_req for * more info. */ static int ti_sci_cmd_rm_udmap_tx_ch_cfg(const struct ti_sci_handle *handle, const struct ti_sci_msg_rm_udmap_tx_ch_cfg *params) { struct ti_sci_msg_rm_udmap_tx_ch_cfg_req *req; struct ti_sci_msg_hdr *resp; struct ti_sci_xfer *xfer; struct ti_sci_info *info; struct device *dev; int ret = 0; if (IS_ERR_OR_NULL(handle)) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TISCI_MSG_RM_UDMAP_TX_CH_CFG, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, sizeof(*req), sizeof(*resp)); if (IS_ERR(xfer)) { ret = PTR_ERR(xfer); dev_err(dev, "Message TX_CH_CFG alloc failed(%d)\n", ret); return ret; } req = (struct ti_sci_msg_rm_udmap_tx_ch_cfg_req *)xfer->xfer_buf; req->valid_params = params->valid_params; req->nav_id = params->nav_id; req->index = params->index; req->tx_pause_on_err = params->tx_pause_on_err; req->tx_filt_einfo = params->tx_filt_einfo; req->tx_filt_pswords = params->tx_filt_pswords; req->tx_atype = params->tx_atype; req->tx_chan_type = params->tx_chan_type; req->tx_supr_tdpkt = params->tx_supr_tdpkt; req->tx_fetch_size = params->tx_fetch_size; req->tx_credit_count = params->tx_credit_count; req->txcq_qnum = params->txcq_qnum; req->tx_priority = params->tx_priority; req->tx_qos = params->tx_qos; req->tx_orderid = params->tx_orderid; req->fdepth = params->fdepth; req->tx_sched_priority = params->tx_sched_priority; req->tx_burst_size = params->tx_burst_size; req->tx_tdtype = params->tx_tdtype; req->extended_ch_type = params->extended_ch_type; ret = ti_sci_do_xfer(info, xfer); if (ret) { dev_err(dev, "Mbox send TX_CH_CFG fail %d\n", ret); goto fail; } resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; fail: ti_sci_put_one_xfer(&info->minfo, xfer); dev_dbg(dev, "TX_CH_CFG: chn %u ret:%u\n", params->index, ret); return ret; } /** * ti_sci_cmd_rm_udmap_rx_ch_cfg() - Configure a UDMAP RX channel * @handle: Pointer to TI SCI handle. * @params: Pointer to ti_sci_msg_rm_udmap_rx_ch_cfg RX channel config * structure * * Return: 0 if all went well, else returns appropriate error value. * * See @ti_sci_msg_rm_udmap_rx_ch_cfg and @ti_sci_msg_rm_udmap_rx_ch_cfg_req for * more info. */ static int ti_sci_cmd_rm_udmap_rx_ch_cfg(const struct ti_sci_handle *handle, const struct ti_sci_msg_rm_udmap_rx_ch_cfg *params) { struct ti_sci_msg_rm_udmap_rx_ch_cfg_req *req; struct ti_sci_msg_hdr *resp; struct ti_sci_xfer *xfer; struct ti_sci_info *info; struct device *dev; int ret = 0; if (IS_ERR_OR_NULL(handle)) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TISCI_MSG_RM_UDMAP_RX_CH_CFG, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, sizeof(*req), sizeof(*resp)); if (IS_ERR(xfer)) { ret = PTR_ERR(xfer); dev_err(dev, "Message RX_CH_CFG alloc failed(%d)\n", ret); return ret; } req = (struct ti_sci_msg_rm_udmap_rx_ch_cfg_req *)xfer->xfer_buf; req->valid_params = params->valid_params; req->nav_id = params->nav_id; req->index = params->index; req->rx_fetch_size = params->rx_fetch_size; req->rxcq_qnum = params->rxcq_qnum; req->rx_priority = params->rx_priority; req->rx_qos = params->rx_qos; req->rx_orderid = params->rx_orderid; req->rx_sched_priority = params->rx_sched_priority; req->flowid_start = params->flowid_start; req->flowid_cnt = params->flowid_cnt; req->rx_pause_on_err = params->rx_pause_on_err; req->rx_atype = params->rx_atype; req->rx_chan_type = params->rx_chan_type; req->rx_ignore_short = params->rx_ignore_short; req->rx_ignore_long = params->rx_ignore_long; req->rx_burst_size = params->rx_burst_size; ret = ti_sci_do_xfer(info, xfer); if (ret) { dev_err(dev, "Mbox send RX_CH_CFG fail %d\n", ret); goto fail; } resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; fail: ti_sci_put_one_xfer(&info->minfo, xfer); dev_dbg(dev, "RX_CH_CFG: chn %u ret:%d\n", params->index, ret); return ret; } /** * ti_sci_cmd_rm_udmap_rx_flow_cfg() - Configure UDMAP RX FLOW * @handle: Pointer to TI SCI handle. * @params: Pointer to ti_sci_msg_rm_udmap_flow_cfg RX FLOW config * structure * * Return: 0 if all went well, else returns appropriate error value. * * See @ti_sci_msg_rm_udmap_flow_cfg and @ti_sci_msg_rm_udmap_flow_cfg_req for * more info. */ static int ti_sci_cmd_rm_udmap_rx_flow_cfg(const struct ti_sci_handle *handle, const struct ti_sci_msg_rm_udmap_flow_cfg *params) { struct ti_sci_msg_rm_udmap_flow_cfg_req *req; struct ti_sci_msg_hdr *resp; struct ti_sci_xfer *xfer; struct ti_sci_info *info; struct device *dev; int ret = 0; if (IS_ERR_OR_NULL(handle)) return -EINVAL; info = handle_to_ti_sci_info(handle); dev = info->dev; xfer = ti_sci_get_one_xfer(info, TISCI_MSG_RM_UDMAP_FLOW_CFG, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, sizeof(*req), sizeof(*resp)); if (IS_ERR(xfer)) { ret = PTR_ERR(xfer); dev_err(dev, "RX_FL_CFG: Message alloc failed(%d)\n", ret); return ret; } req = (struct ti_sci_msg_rm_udmap_flow_cfg_req *)xfer->xfer_buf; req->valid_params = params->valid_params; req->nav_id = params->nav_id; req->flow_index = params->flow_index; req->rx_einfo_present = params->rx_einfo_present; req->rx_psinfo_present = params->rx_psinfo_present; req->rx_error_handling = params->rx_error_handling; req->rx_desc_type = params->rx_desc_type; req->rx_sop_offset = params->rx_sop_offset; req->rx_dest_qnum = params->rx_dest_qnum; req->rx_src_tag_hi = params->rx_src_tag_hi; req->rx_src_tag_lo = params->rx_src_tag_lo; req->rx_dest_tag_hi = params->rx_dest_tag_hi; req->rx_dest_tag_lo = params->rx_dest_tag_lo; req->rx_src_tag_hi_sel = params->rx_src_tag_hi_sel; req->rx_src_tag_lo_sel = params->rx_src_tag_lo_sel; req->rx_dest_tag_hi_sel = params->rx_dest_tag_hi_sel; req->rx_dest_tag_lo_sel = params->rx_dest_tag_lo_sel; req->rx_fdq0_sz0_qnum = params->rx_fdq0_sz0_qnum; req->rx_fdq1_qnum = params->rx_fdq1_qnum; req->rx_fdq2_qnum = params->rx_fdq2_qnum; req->rx_fdq3_qnum = params->rx_fdq3_qnum; req->rx_ps_location = params->rx_ps_location; ret = ti_sci_do_xfer(info, xfer); if (ret) { dev_err(dev, "RX_FL_CFG: Mbox send fail %d\n", ret); goto fail; } resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; fail: ti_sci_put_one_xfer(&info->minfo, xfer); dev_dbg(info->dev, "RX_FL_CFG: %u ret:%d\n", params->flow_index, ret); 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 */ static void ti_sci_setup_ops(struct ti_sci_info *info) { struct ti_sci_ops *ops = &info->handle.ops; 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_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; 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; dops->get_device = ti_sci_cmd_get_device; dops->get_device_exclusive = ti_sci_cmd_get_device_exclusive; dops->idle_device = ti_sci_cmd_idle_device; dops->idle_device_exclusive = ti_sci_cmd_idle_device_exclusive; dops->put_device = ti_sci_cmd_put_device; dops->is_valid = ti_sci_cmd_dev_is_valid; dops->get_context_loss_count = ti_sci_cmd_dev_get_clcnt; dops->is_idle = ti_sci_cmd_dev_is_idle; dops->is_stop = ti_sci_cmd_dev_is_stop; dops->is_on = ti_sci_cmd_dev_is_on; dops->is_transitioning = ti_sci_cmd_dev_is_trans; dops->set_device_resets = ti_sci_cmd_set_device_resets; dops->get_device_resets = ti_sci_cmd_get_device_resets; cops->get_clock = ti_sci_cmd_get_clock; cops->idle_clock = ti_sci_cmd_idle_clock; cops->put_clock = ti_sci_cmd_put_clock; cops->is_auto = ti_sci_cmd_clk_is_auto; cops->is_on = ti_sci_cmd_clk_is_on; cops->is_off = ti_sci_cmd_clk_is_off; cops->set_parent = ti_sci_cmd_clk_set_parent; cops->get_parent = ti_sci_cmd_clk_get_parent; cops->get_num_parents = ti_sci_cmd_clk_get_num_parents; cops->get_best_match_freq = ti_sci_cmd_clk_get_match_freq; cops->set_freq = ti_sci_cmd_clk_set_freq; cops->get_freq = ti_sci_cmd_clk_get_freq; 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; iops->set_irq = ti_sci_cmd_set_irq; iops->set_event_map = ti_sci_cmd_set_event_map; iops->free_irq = ti_sci_cmd_free_irq; iops->free_event_map = ti_sci_cmd_free_event_map; rops->set_cfg = ti_sci_cmd_rm_ring_cfg; psilops->pair = ti_sci_cmd_rm_psil_pair; psilops->unpair = ti_sci_cmd_rm_psil_unpair; 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; } /** * ti_sci_get_handle() - Get the TI SCI handle for a device * @dev: Pointer to device for which we want SCI handle * * NOTE: The function does not track individual clients of the framework * and is expected to be maintained by caller of TI SCI protocol library. * ti_sci_put_handle must be balanced with successful ti_sci_get_handle * Return: pointer to handle if successful, else: * -EPROBE_DEFER if the instance is not ready * -ENODEV if the required node handler is missing * -EINVAL if invalid conditions are encountered. */ const struct ti_sci_handle *ti_sci_get_handle(struct device *dev) { struct device_node *ti_sci_np; struct list_head *p; struct ti_sci_handle *handle = NULL; struct ti_sci_info *info; if (!dev) { pr_err("I need a device pointer\n"); return ERR_PTR(-EINVAL); } ti_sci_np = of_get_parent(dev->of_node); if (!ti_sci_np) { dev_err(dev, "No OF information\n"); return ERR_PTR(-EINVAL); } mutex_lock(&ti_sci_list_mutex); list_for_each(p, &ti_sci_list) { info = list_entry(p, struct ti_sci_info, node); if (ti_sci_np == info->dev->of_node) { handle = &info->handle; info->users++; break; } } mutex_unlock(&ti_sci_list_mutex); of_node_put(ti_sci_np); if (!handle) return ERR_PTR(-EPROBE_DEFER); return handle; } EXPORT_SYMBOL_GPL(ti_sci_get_handle); /** * ti_sci_put_handle() - Release the handle acquired by ti_sci_get_handle * @handle: Handle acquired by ti_sci_get_handle * * NOTE: The function does not track individual clients of the framework * and is expected to be maintained by caller of TI SCI protocol library. * ti_sci_put_handle must be balanced with successful ti_sci_get_handle * * Return: 0 is successfully released * if an error pointer was passed, it returns the error value back, * if null was passed, it returns -EINVAL; */ int ti_sci_put_handle(const struct ti_sci_handle *handle) { struct ti_sci_info *info; if (IS_ERR(handle)) return PTR_ERR(handle); if (!handle) return -EINVAL; info = handle_to_ti_sci_info(handle); mutex_lock(&ti_sci_list_mutex); if (!WARN_ON(!info->users)) info->users--; mutex_unlock(&ti_sci_list_mutex); return 0; } EXPORT_SYMBOL_GPL(ti_sci_put_handle); static void devm_ti_sci_release(struct device *dev, void *res) { const struct ti_sci_handle **ptr = res; const struct ti_sci_handle *handle = *ptr; int ret; ret = ti_sci_put_handle(handle); if (ret) dev_err(dev, "failed to put handle %d\n", ret); } /** * devm_ti_sci_get_handle() - Managed get handle * @dev: device for which we want SCI handle for. * * NOTE: This releases the handle once the device resources are * no longer needed. MUST NOT BE released with ti_sci_put_handle. * The function does not track individual clients of the framework * and is expected to be maintained by caller of TI SCI protocol library. * * Return: 0 if all went fine, else corresponding error. */ const struct ti_sci_handle *devm_ti_sci_get_handle(struct device *dev) { const struct ti_sci_handle **ptr; const struct ti_sci_handle *handle; ptr = devres_alloc(devm_ti_sci_release, sizeof(*ptr), GFP_KERNEL); if (!ptr) return ERR_PTR(-ENOMEM); handle = ti_sci_get_handle(dev); if (!IS_ERR(handle)) { *ptr = handle; devres_add(dev, ptr); } else { devres_free(ptr); } return handle; } EXPORT_SYMBOL_GPL(devm_ti_sci_get_handle); /** * ti_sci_get_by_phandle() - Get the TI SCI handle using DT phandle * @np: device node * @property: property name containing phandle on TISCI node * * NOTE: The function does not track individual clients of the framework * and is expected to be maintained by caller of TI SCI protocol library. * ti_sci_put_handle must be balanced with successful ti_sci_get_by_phandle * Return: pointer to handle if successful, else: * -EPROBE_DEFER if the instance is not ready * -ENODEV if the required node handler is missing * -EINVAL if invalid conditions are encountered. */ const struct ti_sci_handle *ti_sci_get_by_phandle(struct device_node *np, const char *property) { struct ti_sci_handle *handle = NULL; struct device_node *ti_sci_np; struct ti_sci_info *info; struct list_head *p; if (!np) { pr_err("I need a device pointer\n"); return ERR_PTR(-EINVAL); } ti_sci_np = of_parse_phandle(np, property, 0); if (!ti_sci_np) return ERR_PTR(-ENODEV); mutex_lock(&ti_sci_list_mutex); list_for_each(p, &ti_sci_list) { info = list_entry(p, struct ti_sci_info, node); if (ti_sci_np == info->dev->of_node) { handle = &info->handle; info->users++; break; } } mutex_unlock(&ti_sci_list_mutex); of_node_put(ti_sci_np); if (!handle) return ERR_PTR(-EPROBE_DEFER); return handle; } EXPORT_SYMBOL_GPL(ti_sci_get_by_phandle); /** * devm_ti_sci_get_by_phandle() - Managed get handle using phandle * @dev: Device pointer requesting TISCI handle * @property: property name containing phandle on TISCI node * * NOTE: This releases the handle once the device resources are * no longer needed. MUST NOT BE released with ti_sci_put_handle. * The function does not track individual clients of the framework * and is expected to be maintained by caller of TI SCI protocol library. * * Return: 0 if all went fine, else corresponding error. */ const struct ti_sci_handle *devm_ti_sci_get_by_phandle(struct device *dev, const char *property) { const struct ti_sci_handle *handle; const struct ti_sci_handle **ptr; ptr = devres_alloc(devm_ti_sci_release, sizeof(*ptr), GFP_KERNEL); if (!ptr) return ERR_PTR(-ENOMEM); handle = ti_sci_get_by_phandle(dev_of_node(dev), property); if (!IS_ERR(handle)) { *ptr = handle; devres_add(dev, ptr); } else { devres_free(ptr); } return handle; } EXPORT_SYMBOL_GPL(devm_ti_sci_get_by_phandle); /** * ti_sci_get_free_resource() - Get a free resource from TISCI resource. * @res: Pointer to the TISCI resource * * Return: resource num if all went ok else TI_SCI_RESOURCE_NULL. */ u16 ti_sci_get_free_resource(struct ti_sci_resource *res) { unsigned long flags; u16 set, free_bit; raw_spin_lock_irqsave(&res->lock, flags); for (set = 0; set < res->sets; set++) { struct ti_sci_resource_desc *desc = &res->desc[set]; int res_count = desc->num + desc->num_sec; free_bit = find_first_zero_bit(desc->res_map, res_count); if (free_bit != res_count) { __set_bit(free_bit, desc->res_map); raw_spin_unlock_irqrestore(&res->lock, flags); if (desc->num && free_bit < desc->num) return desc->start + free_bit; else return desc->start_sec + free_bit; } } raw_spin_unlock_irqrestore(&res->lock, flags); return TI_SCI_RESOURCE_NULL; } EXPORT_SYMBOL_GPL(ti_sci_get_free_resource); /** * ti_sci_release_resource() - Release a resource from TISCI resource. * @res: Pointer to the TISCI resource * @id: Resource id to be released. */ void ti_sci_release_resource(struct ti_sci_resource *res, u16 id) { unsigned long flags; u16 set; raw_spin_lock_irqsave(&res->lock, flags); for (set = 0; set < res->sets; set++) { struct ti_sci_resource_desc *desc = &res->desc[set]; if (desc->num && desc->start <= id && (desc->start + desc->num) > id) __clear_bit(id - desc->start, desc->res_map); else if (desc->num_sec && desc->start_sec <= id && (desc->start_sec + desc->num_sec) > id) __clear_bit(id - desc->start_sec, desc->res_map); } raw_spin_unlock_irqrestore(&res->lock, flags); } EXPORT_SYMBOL_GPL(ti_sci_release_resource); /** * ti_sci_get_num_resources() - Get the number of resources in TISCI resource * @res: Pointer to the TISCI resource * * Return: Total number of available resources. */ u32 ti_sci_get_num_resources(struct ti_sci_resource *res) { u32 set, count = 0; for (set = 0; set < res->sets; set++) count += res->desc[set].num + res->desc[set].num_sec; return count; } EXPORT_SYMBOL_GPL(ti_sci_get_num_resources); /** * devm_ti_sci_get_resource_sets() - Get a TISCI resources assigned to a device * @handle: TISCI handle * @dev: Device pointer to which the resource is assigned * @dev_id: TISCI device id to which the resource is assigned * @sub_types: Array of sub_types assigned corresponding to device * @sets: Number of sub_types * * Return: Pointer to ti_sci_resource if all went well else appropriate * error pointer. */ static struct ti_sci_resource * devm_ti_sci_get_resource_sets(const struct ti_sci_handle *handle, struct device *dev, u32 dev_id, u32 *sub_types, u32 sets) { struct ti_sci_resource *res; bool valid_set = false; int i, ret, res_count; res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL); if (!res) return ERR_PTR(-ENOMEM); res->sets = sets; res->desc = devm_kcalloc(dev, res->sets, sizeof(*res->desc), GFP_KERNEL); if (!res->desc) return ERR_PTR(-ENOMEM); for (i = 0; i < res->sets; i++) { ret = handle->ops.rm_core_ops.get_range(handle, dev_id, sub_types[i], &res->desc[i]); if (ret) { dev_dbg(dev, "dev = %d subtype %d not allocated for this host\n", dev_id, sub_types[i]); memset(&res->desc[i], 0, sizeof(res->desc[i])); continue; } dev_dbg(dev, "dev/sub_type: %d/%d, start/num: %d/%d | %d/%d\n", dev_id, sub_types[i], res->desc[i].start, res->desc[i].num, res->desc[i].start_sec, res->desc[i].num_sec); valid_set = true; res_count = res->desc[i].num + res->desc[i].num_sec; res->desc[i].res_map = devm_bitmap_zalloc(dev, res_count, GFP_KERNEL); if (!res->desc[i].res_map) return ERR_PTR(-ENOMEM); } raw_spin_lock_init(&res->lock); if (valid_set) return res; return ERR_PTR(-EINVAL); } /** * devm_ti_sci_get_of_resource() - Get a TISCI resource assigned to a device * @handle: TISCI handle * @dev: Device pointer to which the resource is assigned * @dev_id: TISCI device id to which the resource is assigned * @of_prop: property name by which the resource are represented * * Return: Pointer to ti_sci_resource if all went well else appropriate * error pointer. */ struct ti_sci_resource * devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle, struct device *dev, u32 dev_id, char *of_prop) { struct ti_sci_resource *res; u32 *sub_types; int sets; sets = of_property_count_elems_of_size(dev_of_node(dev), of_prop, sizeof(u32)); if (sets < 0) { dev_err(dev, "%s resource type ids not available\n", of_prop); return ERR_PTR(sets); } sub_types = kcalloc(sets, sizeof(*sub_types), GFP_KERNEL); if (!sub_types) return ERR_PTR(-ENOMEM); of_property_read_u32_array(dev_of_node(dev), of_prop, sub_types, sets); res = devm_ti_sci_get_resource_sets(handle, dev, dev_id, sub_types, sets); kfree(sub_types); return res; } EXPORT_SYMBOL_GPL(devm_ti_sci_get_of_resource); /** * devm_ti_sci_get_resource() - Get a resource range assigned to the device * @handle: TISCI handle * @dev: Device pointer to which the resource is assigned * @dev_id: TISCI device id to which the resource is assigned * @suub_type: TISCI resource subytpe representing the resource. * * Return: Pointer to ti_sci_resource if all went well else appropriate * error pointer. */ struct ti_sci_resource * devm_ti_sci_get_resource(const struct ti_sci_handle *handle, struct device *dev, u32 dev_id, u32 sub_type) { return devm_ti_sci_get_resource_sets(handle, dev, dev_id, &sub_type, 1); } EXPORT_SYMBOL_GPL(devm_ti_sci_get_resource); static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode, void *cmd) { struct ti_sci_info *info = reboot_to_ti_sci_info(nb); const struct ti_sci_handle *handle = &info->handle; ti_sci_cmd_core_reboot(handle); /* call fail OR pass, we should not be here in the first place */ return NOTIFY_BAD; } static void ti_sci_set_is_suspending(struct ti_sci_info *info, bool is_suspending) { info->is_suspending = is_suspending; } static int ti_sci_suspend(struct device *dev) { struct ti_sci_info *info = dev_get_drvdata(dev); /* * We must switch operation to polled mode now as drivers and the genpd * layer may make late TI SCI calls to change clock and device states * from the noirq phase of suspend. */ ti_sci_set_is_suspending(info, true); return 0; } static int ti_sci_resume(struct device *dev) { struct ti_sci_info *info = dev_get_drvdata(dev); ti_sci_set_is_suspending(info, false); return 0; } static DEFINE_SIMPLE_DEV_PM_OPS(ti_sci_pm_ops, ti_sci_suspend, ti_sci_resume); /* Description for K2G */ static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = { .default_host_id = 2, /* Conservative duration */ .max_rx_timeout_ms = 1000, /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ .max_msgs = 20, .max_msg_size = 64, }; /* Description for AM654 */ static const struct ti_sci_desc ti_sci_pmmc_am654_desc = { .default_host_id = 12, /* Conservative duration */ .max_rx_timeout_ms = 10000, /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ .max_msgs = 20, .max_msg_size = 60, }; static const struct of_device_id ti_sci_of_match[] = { {.compatible = "ti,k2g-sci", .data = &ti_sci_pmmc_k2g_desc}, {.compatible = "ti,am654-sci", .data = &ti_sci_pmmc_am654_desc}, { /* Sentinel */ }, }; MODULE_DEVICE_TABLE(of, ti_sci_of_match); static int ti_sci_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; const struct of_device_id *of_id; const struct ti_sci_desc *desc; struct ti_sci_xfer *xfer; struct ti_sci_info *info = NULL; struct ti_sci_xfers_info *minfo; struct mbox_client *cl; int ret = -EINVAL; int i; int reboot = 0; u32 h_id; of_id = of_match_device(ti_sci_of_match, dev); if (!of_id) { dev_err(dev, "OF data missing\n"); return -EINVAL; } desc = of_id->data; info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; info->dev = dev; info->desc = desc; ret = of_property_read_u32(dev->of_node, "ti,host-id", &h_id); /* if the property is not present in DT, use a default from desc */ if (ret < 0) { info->host_id = info->desc->default_host_id; } else { if (!h_id) { dev_warn(dev, "Host ID 0 is reserved for firmware\n"); info->host_id = info->desc->default_host_id; } else { info->host_id = h_id; } } reboot = of_property_read_bool(dev->of_node, "ti,system-reboot-controller"); INIT_LIST_HEAD(&info->node); minfo = &info->minfo; /* * Pre-allocate messages * NEVER allocate more than what we can indicate in hdr.seq * if we have data description bug, force a fix.. */ if (WARN_ON(desc->max_msgs >= 1 << 8 * sizeof(((struct ti_sci_msg_hdr *)0)->seq))) return -EINVAL; minfo->xfer_block = devm_kcalloc(dev, desc->max_msgs, sizeof(*minfo->xfer_block), GFP_KERNEL); if (!minfo->xfer_block) return -ENOMEM; minfo->xfer_alloc_table = devm_bitmap_zalloc(dev, desc->max_msgs, GFP_KERNEL); if (!minfo->xfer_alloc_table) return -ENOMEM; /* Pre-initialize the buffer pointer to pre-allocated buffers */ for (i = 0, xfer = minfo->xfer_block; i < desc->max_msgs; i++, xfer++) { xfer->xfer_buf = devm_kcalloc(dev, 1, desc->max_msg_size, GFP_KERNEL); if (!xfer->xfer_buf) return -ENOMEM; xfer->tx_message.buf = xfer->xfer_buf; init_completion(&xfer->done); } ret = ti_sci_debugfs_create(pdev, info); if (ret) dev_warn(dev, "Failed to create debug file\n"); platform_set_drvdata(pdev, info); cl = &info->cl; cl->dev = dev; cl->tx_block = false; cl->rx_callback = ti_sci_rx_callback; cl->knows_txdone = true; spin_lock_init(&minfo->xfer_lock); sema_init(&minfo->sem_xfer_count, desc->max_msgs); info->chan_rx = mbox_request_channel_byname(cl, "rx"); if (IS_ERR(info->chan_rx)) { ret = PTR_ERR(info->chan_rx); goto out; } info->chan_tx = mbox_request_channel_byname(cl, "tx"); if (IS_ERR(info->chan_tx)) { ret = PTR_ERR(info->chan_tx); goto out; } ret = ti_sci_cmd_get_revision(info); if (ret) { dev_err(dev, "Unable to communicate with TISCI(%d)\n", ret); goto out; } ti_sci_setup_ops(info); if (reboot) { info->nb.notifier_call = tisci_reboot_handler; info->nb.priority = 128; ret = register_restart_handler(&info->nb); if (ret) { dev_err(dev, "reboot registration fail(%d)\n", ret); goto out; } } dev_info(dev, "ABI: %d.%d (firmware rev 0x%04x '%s')\n", info->handle.version.abi_major, info->handle.version.abi_minor, info->handle.version.firmware_revision, info->handle.version.firmware_description); mutex_lock(&ti_sci_list_mutex); list_add_tail(&info->node, &ti_sci_list); mutex_unlock(&ti_sci_list_mutex); return of_platform_populate(dev->of_node, NULL, NULL, dev); out: if (!IS_ERR(info->chan_tx)) mbox_free_channel(info->chan_tx); if (!IS_ERR(info->chan_rx)) mbox_free_channel(info->chan_rx); debugfs_remove(info->d); return ret; } static int ti_sci_remove(struct platform_device *pdev) { struct ti_sci_info *info; struct device *dev = &pdev->dev; int ret = 0; of_platform_depopulate(dev); info = platform_get_drvdata(pdev); if (info->nb.notifier_call) unregister_restart_handler(&info->nb); mutex_lock(&ti_sci_list_mutex); if (info->users) ret = -EBUSY; else list_del(&info->node); mutex_unlock(&ti_sci_list_mutex); if (!ret) { ti_sci_debugfs_destroy(pdev, info); /* Safe to free channels since no more users */ mbox_free_channel(info->chan_tx); mbox_free_channel(info->chan_rx); } return ret; } static struct platform_driver ti_sci_driver = { .probe = ti_sci_probe, .remove = ti_sci_remove, .driver = { .name = "ti-sci", .of_match_table = of_match_ptr(ti_sci_of_match), .pm = &ti_sci_pm_ops, }, }; module_platform_driver(ti_sci_driver); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("TI System Control Interface(SCI) driver"); MODULE_AUTHOR("Nishanth Menon"); MODULE_ALIAS("platform:ti-sci");
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