| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Texas Instruments System Control Interface Protocol Driver |
| * |
| * Copyright (C) 2015-2016 Texas Instruments Incorporated - http://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/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_rm_type_map - Structure representing TISCI Resource |
| * management representation of dev_ids. |
| * @dev_id: TISCI device ID |
| * @type: Corresponding id as identified by TISCI RM. |
| * |
| * Note: This is used only as a work around for using RM range apis |
| * for AM654 SoC. For future SoCs dev_id will be used as type |
| * for RM range APIs. In order to maintain ABI backward compatibility |
| * type is not being changed for AM654 SoC. |
| */ |
| struct ti_sci_rm_type_map { |
| u32 dev_id; |
| u16 type; |
| }; |
| |
| /** |
| * 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. |
| * @rm_type_map: RM resource type mapping structure. |
| */ |
| struct ti_sci_desc { |
| u8 default_host_id; |
| int max_rx_timeout_ms; |
| int max_msgs; |
| int max_msg_size; |
| struct ti_sci_rm_type_map *rm_type_map; |
| }; |
| |
| /** |
| * 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 |
| */ |
| 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; |
| |
| }; |
| |
| #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->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; |
| |
| ret = mbox_send_message(info->chan_tx, &xfer->tx_message); |
| if (ret < 0) |
| return ret; |
| |
| ret = 0; |
| |
| /* And we wait for the response. */ |
| timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms); |
| if (!wait_for_completion_timeout(&xfer->done, timeout)) { |
| dev_err(dev, "Mbox timedout in resp(caller: %pS)\n", |
| (void *)_RET_IP_); |
| ret = -ETIMEDOUT; |
| } |
| /* |
| * 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, 0, |
| 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, 0, |
| 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; |
| } |
| |
| static int ti_sci_get_resource_type(struct ti_sci_info *info, u16 dev_id, |
| u16 *type) |
| { |
| struct ti_sci_rm_type_map *rm_type_map = info->desc->rm_type_map; |
| bool found = false; |
| int i; |
| |
| /* If map is not provided then assume dev_id is used as type */ |
| if (!rm_type_map) { |
| *type = dev_id; |
| return 0; |
| } |
| |
| for (i = 0; rm_type_map[i].dev_id; i++) { |
| if (rm_type_map[i].dev_id == dev_id) { |
| *type = rm_type_map[i].type; |
| found = true; |
| break; |
| } |
| } |
| |
| if (!found) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| /** |
| * 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 |
| * @range_start: Start index of the resource range |
| * @range_num: Number of resources in the range |
| * |
| * 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, |
| u16 *range_start, u16 *range_num) |
| { |
| 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; |
| u16 type; |
| 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_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; |
| } |
| |
| ret = ti_sci_get_resource_type(info, dev_id, &type); |
| if (ret) { |
| dev_err(dev, "rm type lookup failed for %u\n", dev_id); |
| goto fail; |
| } |
| |
| req = (struct ti_sci_msg_req_get_resource_range *)xfer->xfer_buf; |
| req->secondary_host = s_host; |
| req->type = type & 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_start && !resp->range_num) { |
| ret = -ENODEV; |
| } else { |
| *range_start = resp->range_start; |
| *range_num = resp->range_num; |
| }; |
| |
| 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. |
| * @range_start: Start index of the resource range |
| * @range_num: Number of resources in the range |
| * |
| * 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, |
| u16 *range_start, u16 *range_num) |
| { |
| return ti_sci_get_resource_range(handle, dev_id, subtype, |
| TI_SCI_IRQ_SECONDARY_HOST_INVALID, |
| range_start, range_num); |
| } |
| |
| /** |
| * 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 |
| * @range_start: Start index of the resource range |
| * @range_num: Number of resources in the range |
| * |
| * 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, |
| u16 *range_start, u16 *range_num) |
| { |
| return ti_sci_get_resource_range(handle, dev_id, subtype, s_host, |
| range_start, range_num); |
| } |
| |
| /** |
| * 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_ring_config() - configure RA ring |
| * @handle: Pointer to TI SCI handle. |
| * @valid_params: Bitfield defining validity of ring configuration |
| * parameters |
| * @nav_id: Device ID of Navigator Subsystem from which the ring is |
| * allocated |
| * @index: Ring index |
| * @addr_lo: The ring base address lo 32 bits |
| * @addr_hi: The ring base address hi 32 bits |
| * @count: Number of ring elements |
| * @mode: The mode of the ring |
| * @size: The ring element size. |
| * @order_id: Specifies the ring's bus order ID |
| * |
| * Return: 0 if all went well, else returns appropriate error value. |
| * |
| * See @ti_sci_msg_rm_ring_cfg_req for more info. |
| */ |
| static int ti_sci_cmd_ring_config(const struct ti_sci_handle *handle, |
| u32 valid_params, u16 nav_id, u16 index, |
| u32 addr_lo, u32 addr_hi, u32 count, |
| u8 mode, u8 size, u8 order_id) |
| { |
| 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 = valid_params; |
| req->nav_id = nav_id; |
| req->index = index; |
| req->addr_lo = addr_lo; |
| req->addr_hi = addr_hi; |
| req->count = count; |
| req->mode = mode; |
| req->size = size; |
| req->order_id = order_id; |
| |
| 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 : -ENODEV; |
| |
| fail: |
| ti_sci_put_one_xfer(&info->minfo, xfer); |
| dev_dbg(dev, "RM_RA:config ring %u ret:%d\n", index, ret); |
| return ret; |
| } |
| |
| /** |
| * ti_sci_cmd_ring_get_config() - get RA ring configuration |
| * @handle: Pointer to TI SCI handle. |
| * @nav_id: Device ID of Navigator Subsystem from which the ring is |
| * allocated |
| * @index: Ring index |
| * @addr_lo: Returns ring's base address lo 32 bits |
| * @addr_hi: Returns ring's base address hi 32 bits |
| * @count: Returns number of ring elements |
| * @mode: Returns mode of the ring |
| * @size: Returns ring element size |
| * @order_id: Returns ring's bus order ID |
| * |
| * Return: 0 if all went well, else returns appropriate error value. |
| * |
| * See @ti_sci_msg_rm_ring_get_cfg_req for more info. |
| */ |
| static int ti_sci_cmd_ring_get_config(const struct ti_sci_handle *handle, |
| u32 nav_id, u32 index, u8 *mode, |
| u32 *addr_lo, u32 *addr_hi, |
| u32 *count, u8 *size, u8 *order_id) |
| { |
| struct ti_sci_msg_rm_ring_get_cfg_resp *resp; |
| struct ti_sci_msg_rm_ring_get_cfg_req *req; |
| 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_GET_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 get config failed(%d)\n", ret); |
| return ret; |
| } |
| req = (struct ti_sci_msg_rm_ring_get_cfg_req *)xfer->xfer_buf; |
| req->nav_id = nav_id; |
| req->index = index; |
| |
| ret = ti_sci_do_xfer(info, xfer); |
| if (ret) { |
| dev_err(dev, "RM_RA:Mbox get config send fail %d\n", ret); |
| goto fail; |
| } |
| |
| resp = (struct ti_sci_msg_rm_ring_get_cfg_resp *)xfer->xfer_buf; |
| |
| if (!ti_sci_is_response_ack(resp)) { |
| ret = -ENODEV; |
| } else { |
| if (mode) |
| *mode = resp->mode; |
| if (addr_lo) |
| *addr_lo = resp->addr_lo; |
| if (addr_hi) |
| *addr_hi = resp->addr_hi; |
| if (count) |
| *count = resp->count; |
| if (size) |
| *size = resp->size; |
| if (order_id) |
| *order_id = resp->order_id; |
| }; |
| |
| fail: |
| ti_sci_put_one_xfer(&info->minfo, xfer); |
| dev_dbg(dev, "RM_RA:get config ring %u ret:%d\n", 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; |
| |
| 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->config = ti_sci_cmd_ring_config; |
| rops->get_config = ti_sci_cmd_ring_get_config; |
| |
| 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++) { |
| free_bit = find_first_zero_bit(res->desc[set].res_map, |
| res->desc[set].num); |
| if (free_bit != res->desc[set].num) { |
| set_bit(free_bit, res->desc[set].res_map); |
| raw_spin_unlock_irqrestore(&res->lock, flags); |
| return res->desc[set].start + 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++) { |
| if (res->desc[set].start <= id && |
| (res->desc[set].num + res->desc[set].start) > id) |
| clear_bit(id - res->desc[set].start, |
| res->desc[set].res_map); |
| } |
| raw_spin_unlock_irqrestore(&res->lock, flags); |
| } |
|