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839 lines
24 KiB
839 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Texas Instruments' Message Manager Driver |
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* |
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* Copyright (C) 2015-2017 Texas Instruments Incorporated - https://www.ti.com/ |
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* Nishanth Menon |
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*/ |
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|
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#define pr_fmt(fmt) "%s: " fmt, __func__ |
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#include <linux/device.h> |
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#include <linux/interrupt.h> |
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#include <linux/io.h> |
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#include <linux/kernel.h> |
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#include <linux/mailbox_controller.h> |
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#include <linux/module.h> |
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#include <linux/of_device.h> |
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#include <linux/of.h> |
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#include <linux/of_irq.h> |
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#include <linux/platform_device.h> |
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#include <linux/soc/ti/ti-msgmgr.h> |
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#define Q_DATA_OFFSET(proxy, queue, reg) \ |
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((0x10000 * (proxy)) + (0x80 * (queue)) + ((reg) * 4)) |
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#define Q_STATE_OFFSET(queue) ((queue) * 0x4) |
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#define Q_STATE_ENTRY_COUNT_MASK (0xFFF000) |
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#define SPROXY_THREAD_OFFSET(tid) (0x1000 * (tid)) |
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#define SPROXY_THREAD_DATA_OFFSET(tid, reg) \ |
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(SPROXY_THREAD_OFFSET(tid) + ((reg) * 0x4) + 0x4) |
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#define SPROXY_THREAD_STATUS_OFFSET(tid) (SPROXY_THREAD_OFFSET(tid)) |
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#define SPROXY_THREAD_STATUS_COUNT_MASK (0xFF) |
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#define SPROXY_THREAD_CTRL_OFFSET(tid) (0x1000 + SPROXY_THREAD_OFFSET(tid)) |
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#define SPROXY_THREAD_CTRL_DIR_MASK (0x1 << 31) |
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/** |
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* struct ti_msgmgr_valid_queue_desc - SoC valid queues meant for this processor |
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* @queue_id: Queue Number for this path |
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* @proxy_id: Proxy ID representing the processor in SoC |
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* @is_tx: Is this a receive path? |
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*/ |
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struct ti_msgmgr_valid_queue_desc { |
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u8 queue_id; |
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u8 proxy_id; |
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bool is_tx; |
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}; |
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/** |
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* struct ti_msgmgr_desc - Description of message manager integration |
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* @queue_count: Number of Queues |
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* @max_message_size: Message size in bytes |
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* @max_messages: Number of messages |
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* @data_first_reg: First data register for proxy data region |
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* @data_last_reg: Last data register for proxy data region |
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* @status_cnt_mask: Mask for getting the status value |
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* @status_err_mask: Mask for getting the error value, if applicable |
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* @tx_polled: Do I need to use polled mechanism for tx |
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* @tx_poll_timeout_ms: Timeout in ms if polled |
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* @valid_queues: List of Valid queues that the processor can access |
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* @data_region_name: Name of the proxy data region |
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* @status_region_name: Name of the proxy status region |
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* @ctrl_region_name: Name of the proxy control region |
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* @num_valid_queues: Number of valid queues |
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* @is_sproxy: Is this an Secure Proxy instance? |
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* |
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* This structure is used in of match data to describe how integration |
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* for a specific compatible SoC is done. |
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*/ |
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struct ti_msgmgr_desc { |
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u8 queue_count; |
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u8 max_message_size; |
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u8 max_messages; |
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u8 data_first_reg; |
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u8 data_last_reg; |
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u32 status_cnt_mask; |
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u32 status_err_mask; |
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bool tx_polled; |
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int tx_poll_timeout_ms; |
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const struct ti_msgmgr_valid_queue_desc *valid_queues; |
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const char *data_region_name; |
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const char *status_region_name; |
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const char *ctrl_region_name; |
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int num_valid_queues; |
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bool is_sproxy; |
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}; |
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/** |
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* struct ti_queue_inst - Description of a queue instance |
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* @name: Queue Name |
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* @queue_id: Queue Identifier as mapped on SoC |
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* @proxy_id: Proxy Identifier as mapped on SoC |
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* @irq: IRQ for Rx Queue |
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* @is_tx: 'true' if transmit queue, else, 'false' |
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* @queue_buff_start: First register of Data Buffer |
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* @queue_buff_end: Last (or confirmation) register of Data buffer |
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* @queue_state: Queue status register |
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* @queue_ctrl: Queue Control register |
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* @chan: Mailbox channel |
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* @rx_buff: Receive buffer pointer allocated at probe, max_message_size |
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*/ |
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struct ti_queue_inst { |
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char name[30]; |
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u8 queue_id; |
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u8 proxy_id; |
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int irq; |
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bool is_tx; |
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void __iomem *queue_buff_start; |
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void __iomem *queue_buff_end; |
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void __iomem *queue_state; |
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void __iomem *queue_ctrl; |
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struct mbox_chan *chan; |
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u32 *rx_buff; |
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}; |
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/** |
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* struct ti_msgmgr_inst - Description of a Message Manager Instance |
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* @dev: device pointer corresponding to the Message Manager instance |
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* @desc: Description of the SoC integration |
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* @queue_proxy_region: Queue proxy region where queue buffers are located |
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* @queue_state_debug_region: Queue status register regions |
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* @queue_ctrl_region: Queue Control register regions |
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* @num_valid_queues: Number of valid queues defined for the processor |
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* Note: other queues are probably reserved for other processors |
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* in the SoC. |
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* @qinsts: Array of valid Queue Instances for the Processor |
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* @mbox: Mailbox Controller |
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* @chans: Array for channels corresponding to the Queue Instances. |
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*/ |
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struct ti_msgmgr_inst { |
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struct device *dev; |
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const struct ti_msgmgr_desc *desc; |
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void __iomem *queue_proxy_region; |
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void __iomem *queue_state_debug_region; |
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void __iomem *queue_ctrl_region; |
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u8 num_valid_queues; |
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struct ti_queue_inst *qinsts; |
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struct mbox_controller mbox; |
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struct mbox_chan *chans; |
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}; |
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/** |
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* ti_msgmgr_queue_get_num_messages() - Get the number of pending messages |
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* @d: Description of message manager |
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* @qinst: Queue instance for which we check the number of pending messages |
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* |
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* Return: number of messages pending in the queue (0 == no pending messages) |
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*/ |
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static inline int |
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ti_msgmgr_queue_get_num_messages(const struct ti_msgmgr_desc *d, |
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struct ti_queue_inst *qinst) |
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{ |
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u32 val; |
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u32 status_cnt_mask = d->status_cnt_mask; |
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/* |
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* We cannot use relaxed operation here - update may happen |
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* real-time. |
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*/ |
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val = readl(qinst->queue_state) & status_cnt_mask; |
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val >>= __ffs(status_cnt_mask); |
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return val; |
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} |
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/** |
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* ti_msgmgr_queue_is_error() - Check to see if there is queue error |
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* @d: Description of message manager |
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* @qinst: Queue instance for which we check the number of pending messages |
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* |
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* Return: true if error, else false |
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*/ |
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static inline bool ti_msgmgr_queue_is_error(const struct ti_msgmgr_desc *d, |
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struct ti_queue_inst *qinst) |
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{ |
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u32 val; |
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/* Msgmgr has no error detection */ |
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if (!d->is_sproxy) |
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return false; |
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/* |
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* We cannot use relaxed operation here - update may happen |
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* real-time. |
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*/ |
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val = readl(qinst->queue_state) & d->status_err_mask; |
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return val ? true : false; |
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} |
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/** |
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* ti_msgmgr_queue_rx_interrupt() - Interrupt handler for receive Queue |
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* @irq: Interrupt number |
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* @p: Channel Pointer |
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* |
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* Return: -EINVAL if there is no instance |
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* IRQ_NONE if the interrupt is not ours. |
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* IRQ_HANDLED if the rx interrupt was successfully handled. |
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*/ |
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static irqreturn_t ti_msgmgr_queue_rx_interrupt(int irq, void *p) |
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{ |
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struct mbox_chan *chan = p; |
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struct device *dev = chan->mbox->dev; |
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struct ti_msgmgr_inst *inst = dev_get_drvdata(dev); |
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struct ti_queue_inst *qinst = chan->con_priv; |
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const struct ti_msgmgr_desc *desc; |
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int msg_count, num_words; |
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struct ti_msgmgr_message message; |
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void __iomem *data_reg; |
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u32 *word_data; |
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if (WARN_ON(!inst)) { |
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dev_err(dev, "no platform drv data??\n"); |
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return -EINVAL; |
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} |
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/* Do I have an invalid interrupt source? */ |
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if (qinst->is_tx) { |
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dev_err(dev, "Cannot handle rx interrupt on tx channel %s\n", |
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qinst->name); |
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return IRQ_NONE; |
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} |
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desc = inst->desc; |
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if (ti_msgmgr_queue_is_error(desc, qinst)) { |
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dev_err(dev, "Error on Rx channel %s\n", qinst->name); |
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return IRQ_NONE; |
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} |
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/* Do I actually have messages to read? */ |
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msg_count = ti_msgmgr_queue_get_num_messages(desc, qinst); |
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if (!msg_count) { |
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/* Shared IRQ? */ |
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dev_dbg(dev, "Spurious event - 0 pending data!\n"); |
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return IRQ_NONE; |
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} |
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/* |
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* I have no idea about the protocol being used to communicate with the |
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* remote producer - 0 could be valid data, so I wont make a judgement |
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* of how many bytes I should be reading. Let the client figure this |
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* out.. I just read the full message and pass it on.. |
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*/ |
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message.len = desc->max_message_size; |
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message.buf = (u8 *)qinst->rx_buff; |
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/* |
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* NOTE about register access involved here: |
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* the hardware block is implemented with 32bit access operations and no |
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* support for data splitting. We don't want the hardware to misbehave |
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* with sub 32bit access - For example: if the last register read is |
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* split into byte wise access, it can result in the queue getting |
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* stuck or indeterminate behavior. An out of order read operation may |
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* result in weird data results as well. |
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* Hence, we do not use memcpy_fromio or __ioread32_copy here, instead |
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* we depend on readl for the purpose. |
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* |
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* Also note that the final register read automatically marks the |
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* queue message as read. |
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*/ |
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for (data_reg = qinst->queue_buff_start, word_data = qinst->rx_buff, |
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num_words = (desc->max_message_size / sizeof(u32)); |
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num_words; num_words--, data_reg += sizeof(u32), word_data++) |
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*word_data = readl(data_reg); |
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/* |
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* Last register read automatically clears the IRQ if only 1 message |
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* is pending - so send the data up the stack.. |
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* NOTE: Client is expected to be as optimal as possible, since |
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* we invoke the handler in IRQ context. |
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*/ |
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mbox_chan_received_data(chan, (void *)&message); |
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return IRQ_HANDLED; |
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} |
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/** |
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* ti_msgmgr_queue_peek_data() - Peek to see if there are any rx messages. |
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* @chan: Channel Pointer |
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* |
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* Return: 'true' if there is pending rx data, 'false' if there is none. |
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*/ |
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static bool ti_msgmgr_queue_peek_data(struct mbox_chan *chan) |
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{ |
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struct ti_queue_inst *qinst = chan->con_priv; |
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struct device *dev = chan->mbox->dev; |
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struct ti_msgmgr_inst *inst = dev_get_drvdata(dev); |
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const struct ti_msgmgr_desc *desc = inst->desc; |
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int msg_count; |
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if (qinst->is_tx) |
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return false; |
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if (ti_msgmgr_queue_is_error(desc, qinst)) { |
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dev_err(dev, "Error on channel %s\n", qinst->name); |
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return false; |
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} |
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msg_count = ti_msgmgr_queue_get_num_messages(desc, qinst); |
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return msg_count ? true : false; |
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} |
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/** |
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* ti_msgmgr_last_tx_done() - See if all the tx messages are sent |
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* @chan: Channel pointer |
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* |
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* Return: 'true' is no pending tx data, 'false' if there are any. |
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*/ |
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static bool ti_msgmgr_last_tx_done(struct mbox_chan *chan) |
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{ |
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struct ti_queue_inst *qinst = chan->con_priv; |
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struct device *dev = chan->mbox->dev; |
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struct ti_msgmgr_inst *inst = dev_get_drvdata(dev); |
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const struct ti_msgmgr_desc *desc = inst->desc; |
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int msg_count; |
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if (!qinst->is_tx) |
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return false; |
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if (ti_msgmgr_queue_is_error(desc, qinst)) { |
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dev_err(dev, "Error on channel %s\n", qinst->name); |
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return false; |
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} |
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msg_count = ti_msgmgr_queue_get_num_messages(desc, qinst); |
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if (desc->is_sproxy) { |
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/* In secure proxy, msg_count indicates how many we can send */ |
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return msg_count ? true : false; |
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} |
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/* if we have any messages pending.. */ |
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return msg_count ? false : true; |
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} |
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/** |
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* ti_msgmgr_send_data() - Send data |
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* @chan: Channel Pointer |
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* @data: ti_msgmgr_message * Message Pointer |
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* |
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* Return: 0 if all goes good, else appropriate error messages. |
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*/ |
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static int ti_msgmgr_send_data(struct mbox_chan *chan, void *data) |
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{ |
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struct device *dev = chan->mbox->dev; |
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struct ti_msgmgr_inst *inst = dev_get_drvdata(dev); |
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const struct ti_msgmgr_desc *desc; |
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struct ti_queue_inst *qinst = chan->con_priv; |
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int num_words, trail_bytes; |
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struct ti_msgmgr_message *message = data; |
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void __iomem *data_reg; |
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u32 *word_data; |
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if (WARN_ON(!inst)) { |
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dev_err(dev, "no platform drv data??\n"); |
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return -EINVAL; |
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} |
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desc = inst->desc; |
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if (ti_msgmgr_queue_is_error(desc, qinst)) { |
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dev_err(dev, "Error on channel %s\n", qinst->name); |
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return false; |
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} |
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if (desc->max_message_size < message->len) { |
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dev_err(dev, "Queue %s message length %zu > max %d\n", |
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qinst->name, message->len, desc->max_message_size); |
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return -EINVAL; |
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} |
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/* NOTE: Constraints similar to rx path exists here as well */ |
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for (data_reg = qinst->queue_buff_start, |
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num_words = message->len / sizeof(u32), |
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word_data = (u32 *)message->buf; |
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num_words; num_words--, data_reg += sizeof(u32), word_data++) |
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writel(*word_data, data_reg); |
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trail_bytes = message->len % sizeof(u32); |
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if (trail_bytes) { |
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u32 data_trail = *word_data; |
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/* Ensure all unused data is 0 */ |
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data_trail &= 0xFFFFFFFF >> (8 * (sizeof(u32) - trail_bytes)); |
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writel(data_trail, data_reg); |
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data_reg++; |
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} |
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/* |
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* 'data_reg' indicates next register to write. If we did not already |
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* write on tx complete reg(last reg), we must do so for transmit |
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*/ |
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if (data_reg <= qinst->queue_buff_end) |
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writel(0, qinst->queue_buff_end); |
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return 0; |
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} |
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/** |
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* ti_msgmgr_queue_rx_irq_req() - RX IRQ request |
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* @dev: device pointer |
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* @d: descriptor for ti_msgmgr |
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* @qinst: Queue instance |
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* @chan: Channel pointer |
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*/ |
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static int ti_msgmgr_queue_rx_irq_req(struct device *dev, |
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const struct ti_msgmgr_desc *d, |
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struct ti_queue_inst *qinst, |
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struct mbox_chan *chan) |
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{ |
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int ret = 0; |
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char of_rx_irq_name[7]; |
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struct device_node *np; |
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snprintf(of_rx_irq_name, sizeof(of_rx_irq_name), |
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"rx_%03d", d->is_sproxy ? qinst->proxy_id : qinst->queue_id); |
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/* Get the IRQ if not found */ |
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if (qinst->irq < 0) { |
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np = of_node_get(dev->of_node); |
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if (!np) |
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return -ENODATA; |
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qinst->irq = of_irq_get_byname(np, of_rx_irq_name); |
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of_node_put(np); |
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if (qinst->irq < 0) { |
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dev_err(dev, |
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"QID %d PID %d:No IRQ[%s]: %d\n", |
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qinst->queue_id, qinst->proxy_id, |
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of_rx_irq_name, qinst->irq); |
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return qinst->irq; |
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} |
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} |
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/* With the expectation that the IRQ might be shared in SoC */ |
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ret = request_irq(qinst->irq, ti_msgmgr_queue_rx_interrupt, |
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IRQF_SHARED, qinst->name, chan); |
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if (ret) { |
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dev_err(dev, "Unable to get IRQ %d on %s(res=%d)\n", |
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qinst->irq, qinst->name, ret); |
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} |
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return ret; |
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} |
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/** |
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* ti_msgmgr_queue_startup() - Startup queue |
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* @chan: Channel pointer |
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* |
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* Return: 0 if all goes good, else return corresponding error message |
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*/ |
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static int ti_msgmgr_queue_startup(struct mbox_chan *chan) |
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{ |
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struct device *dev = chan->mbox->dev; |
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struct ti_msgmgr_inst *inst = dev_get_drvdata(dev); |
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struct ti_queue_inst *qinst = chan->con_priv; |
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const struct ti_msgmgr_desc *d = inst->desc; |
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int ret; |
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int msg_count; |
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|
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/* |
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* If sproxy is starting and can send messages, we are a Tx thread, |
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* else Rx |
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*/ |
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if (d->is_sproxy) { |
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qinst->is_tx = (readl(qinst->queue_ctrl) & |
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SPROXY_THREAD_CTRL_DIR_MASK) ? false : true; |
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msg_count = ti_msgmgr_queue_get_num_messages(d, qinst); |
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|
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if (!msg_count && qinst->is_tx) { |
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dev_err(dev, "%s: Cannot transmit with 0 credits!\n", |
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qinst->name); |
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return -EINVAL; |
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} |
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} |
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|
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if (!qinst->is_tx) { |
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/* Allocate usage buffer for rx */ |
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qinst->rx_buff = kzalloc(d->max_message_size, GFP_KERNEL); |
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if (!qinst->rx_buff) |
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return -ENOMEM; |
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/* Request IRQ */ |
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ret = ti_msgmgr_queue_rx_irq_req(dev, d, qinst, chan); |
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if (ret) { |
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kfree(qinst->rx_buff); |
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return ret; |
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} |
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} |
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|
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return 0; |
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} |
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|
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/** |
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* ti_msgmgr_queue_shutdown() - Shutdown the queue |
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* @chan: Channel pointer |
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*/ |
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static void ti_msgmgr_queue_shutdown(struct mbox_chan *chan) |
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{ |
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struct ti_queue_inst *qinst = chan->con_priv; |
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|
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if (!qinst->is_tx) { |
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free_irq(qinst->irq, chan); |
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kfree(qinst->rx_buff); |
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} |
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} |
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|
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/** |
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* ti_msgmgr_of_xlate() - Translation of phandle to queue |
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* @mbox: Mailbox controller |
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* @p: phandle pointer |
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* |
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* Return: Mailbox channel corresponding to the queue, else return error |
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* pointer. |
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*/ |
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static struct mbox_chan *ti_msgmgr_of_xlate(struct mbox_controller *mbox, |
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const struct of_phandle_args *p) |
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{ |
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struct ti_msgmgr_inst *inst; |
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int req_qid, req_pid; |
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struct ti_queue_inst *qinst; |
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const struct ti_msgmgr_desc *d; |
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int i, ncells; |
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|
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inst = container_of(mbox, struct ti_msgmgr_inst, mbox); |
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if (WARN_ON(!inst)) |
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return ERR_PTR(-EINVAL); |
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|
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d = inst->desc; |
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|
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if (d->is_sproxy) |
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ncells = 1; |
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else |
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ncells = 2; |
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if (p->args_count != ncells) { |
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dev_err(inst->dev, "Invalid arguments in dt[%d]. Must be %d\n", |
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p->args_count, ncells); |
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return ERR_PTR(-EINVAL); |
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} |
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if (ncells == 1) { |
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req_qid = 0; |
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req_pid = p->args[0]; |
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} else { |
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req_qid = p->args[0]; |
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req_pid = p->args[1]; |
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} |
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|
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if (d->is_sproxy) { |
|
if (req_pid >= d->num_valid_queues) |
|
goto err; |
|
qinst = &inst->qinsts[req_pid]; |
|
return qinst->chan; |
|
} |
|
|
|
for (qinst = inst->qinsts, i = 0; i < inst->num_valid_queues; |
|
i++, qinst++) { |
|
if (req_qid == qinst->queue_id && req_pid == qinst->proxy_id) |
|
return qinst->chan; |
|
} |
|
|
|
err: |
|
dev_err(inst->dev, "Queue ID %d, Proxy ID %d is wrong on %pOFn\n", |
|
req_qid, req_pid, p->np); |
|
return ERR_PTR(-ENOENT); |
|
} |
|
|
|
/** |
|
* ti_msgmgr_queue_setup() - Setup data structures for each queue instance |
|
* @idx: index of the queue |
|
* @dev: pointer to the message manager device |
|
* @np: pointer to the of node |
|
* @inst: Queue instance pointer |
|
* @d: Message Manager instance description data |
|
* @qd: Queue description data |
|
* @qinst: Queue instance pointer |
|
* @chan: pointer to mailbox channel |
|
* |
|
* Return: 0 if all went well, else return corresponding error |
|
*/ |
|
static int ti_msgmgr_queue_setup(int idx, struct device *dev, |
|
struct device_node *np, |
|
struct ti_msgmgr_inst *inst, |
|
const struct ti_msgmgr_desc *d, |
|
const struct ti_msgmgr_valid_queue_desc *qd, |
|
struct ti_queue_inst *qinst, |
|
struct mbox_chan *chan) |
|
{ |
|
char *dir; |
|
|
|
qinst->proxy_id = qd->proxy_id; |
|
qinst->queue_id = qd->queue_id; |
|
|
|
if (qinst->queue_id > d->queue_count) { |
|
dev_err(dev, "Queue Data [idx=%d] queuid %d > %d\n", |
|
idx, qinst->queue_id, d->queue_count); |
|
return -ERANGE; |
|
} |
|
|
|
if (d->is_sproxy) { |
|
qinst->queue_buff_start = inst->queue_proxy_region + |
|
SPROXY_THREAD_DATA_OFFSET(qinst->proxy_id, |
|
d->data_first_reg); |
|
qinst->queue_buff_end = inst->queue_proxy_region + |
|
SPROXY_THREAD_DATA_OFFSET(qinst->proxy_id, |
|
d->data_last_reg); |
|
qinst->queue_state = inst->queue_state_debug_region + |
|
SPROXY_THREAD_STATUS_OFFSET(qinst->proxy_id); |
|
qinst->queue_ctrl = inst->queue_ctrl_region + |
|
SPROXY_THREAD_CTRL_OFFSET(qinst->proxy_id); |
|
|
|
/* XXX: DONOT read registers here!.. Some may be unusable */ |
|
dir = "thr"; |
|
snprintf(qinst->name, sizeof(qinst->name), "%s %s_%03d", |
|
dev_name(dev), dir, qinst->proxy_id); |
|
} else { |
|
qinst->queue_buff_start = inst->queue_proxy_region + |
|
Q_DATA_OFFSET(qinst->proxy_id, qinst->queue_id, |
|
d->data_first_reg); |
|
qinst->queue_buff_end = inst->queue_proxy_region + |
|
Q_DATA_OFFSET(qinst->proxy_id, qinst->queue_id, |
|
d->data_last_reg); |
|
qinst->queue_state = |
|
inst->queue_state_debug_region + |
|
Q_STATE_OFFSET(qinst->queue_id); |
|
qinst->is_tx = qd->is_tx; |
|
dir = qinst->is_tx ? "tx" : "rx"; |
|
snprintf(qinst->name, sizeof(qinst->name), "%s %s_%03d_%03d", |
|
dev_name(dev), dir, qinst->queue_id, qinst->proxy_id); |
|
} |
|
|
|
qinst->chan = chan; |
|
|
|
/* Setup an error value for IRQ - Lazy allocation */ |
|
qinst->irq = -EINVAL; |
|
|
|
chan->con_priv = qinst; |
|
|
|
dev_dbg(dev, "[%d] qidx=%d pidx=%d irq=%d q_s=%p q_e = %p\n", |
|
idx, qinst->queue_id, qinst->proxy_id, qinst->irq, |
|
qinst->queue_buff_start, qinst->queue_buff_end); |
|
return 0; |
|
} |
|
|
|
/* Queue operations */ |
|
static const struct mbox_chan_ops ti_msgmgr_chan_ops = { |
|
.startup = ti_msgmgr_queue_startup, |
|
.shutdown = ti_msgmgr_queue_shutdown, |
|
.peek_data = ti_msgmgr_queue_peek_data, |
|
.last_tx_done = ti_msgmgr_last_tx_done, |
|
.send_data = ti_msgmgr_send_data, |
|
}; |
|
|
|
/* Keystone K2G SoC integration details */ |
|
static const struct ti_msgmgr_valid_queue_desc k2g_valid_queues[] = { |
|
{.queue_id = 0, .proxy_id = 0, .is_tx = true,}, |
|
{.queue_id = 1, .proxy_id = 0, .is_tx = true,}, |
|
{.queue_id = 2, .proxy_id = 0, .is_tx = true,}, |
|
{.queue_id = 3, .proxy_id = 0, .is_tx = true,}, |
|
{.queue_id = 5, .proxy_id = 2, .is_tx = false,}, |
|
{.queue_id = 56, .proxy_id = 1, .is_tx = true,}, |
|
{.queue_id = 57, .proxy_id = 2, .is_tx = false,}, |
|
{.queue_id = 58, .proxy_id = 3, .is_tx = true,}, |
|
{.queue_id = 59, .proxy_id = 4, .is_tx = true,}, |
|
{.queue_id = 60, .proxy_id = 5, .is_tx = true,}, |
|
{.queue_id = 61, .proxy_id = 6, .is_tx = true,}, |
|
}; |
|
|
|
static const struct ti_msgmgr_desc k2g_desc = { |
|
.queue_count = 64, |
|
.max_message_size = 64, |
|
.max_messages = 128, |
|
.data_region_name = "queue_proxy_region", |
|
.status_region_name = "queue_state_debug_region", |
|
.data_first_reg = 16, |
|
.data_last_reg = 31, |
|
.status_cnt_mask = Q_STATE_ENTRY_COUNT_MASK, |
|
.tx_polled = false, |
|
.valid_queues = k2g_valid_queues, |
|
.num_valid_queues = ARRAY_SIZE(k2g_valid_queues), |
|
.is_sproxy = false, |
|
}; |
|
|
|
static const struct ti_msgmgr_desc am654_desc = { |
|
.queue_count = 190, |
|
.num_valid_queues = 190, |
|
.max_message_size = 60, |
|
.data_region_name = "target_data", |
|
.status_region_name = "rt", |
|
.ctrl_region_name = "scfg", |
|
.data_first_reg = 0, |
|
.data_last_reg = 14, |
|
.status_cnt_mask = SPROXY_THREAD_STATUS_COUNT_MASK, |
|
.tx_polled = false, |
|
.is_sproxy = true, |
|
}; |
|
|
|
static const struct of_device_id ti_msgmgr_of_match[] = { |
|
{.compatible = "ti,k2g-message-manager", .data = &k2g_desc}, |
|
{.compatible = "ti,am654-secure-proxy", .data = &am654_desc}, |
|
{ /* Sentinel */ } |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(of, ti_msgmgr_of_match); |
|
|
|
static int ti_msgmgr_probe(struct platform_device *pdev) |
|
{ |
|
struct device *dev = &pdev->dev; |
|
const struct of_device_id *of_id; |
|
struct device_node *np; |
|
struct resource *res; |
|
const struct ti_msgmgr_desc *desc; |
|
struct ti_msgmgr_inst *inst; |
|
struct ti_queue_inst *qinst; |
|
struct mbox_controller *mbox; |
|
struct mbox_chan *chans; |
|
int queue_count; |
|
int i; |
|
int ret = -EINVAL; |
|
const struct ti_msgmgr_valid_queue_desc *queue_desc; |
|
|
|
if (!dev->of_node) { |
|
dev_err(dev, "no OF information\n"); |
|
return -EINVAL; |
|
} |
|
np = dev->of_node; |
|
|
|
of_id = of_match_device(ti_msgmgr_of_match, dev); |
|
if (!of_id) { |
|
dev_err(dev, "OF data missing\n"); |
|
return -EINVAL; |
|
} |
|
desc = of_id->data; |
|
|
|
inst = devm_kzalloc(dev, sizeof(*inst), GFP_KERNEL); |
|
if (!inst) |
|
return -ENOMEM; |
|
|
|
inst->dev = dev; |
|
inst->desc = desc; |
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
|
desc->data_region_name); |
|
inst->queue_proxy_region = devm_ioremap_resource(dev, res); |
|
if (IS_ERR(inst->queue_proxy_region)) |
|
return PTR_ERR(inst->queue_proxy_region); |
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
|
desc->status_region_name); |
|
inst->queue_state_debug_region = devm_ioremap_resource(dev, res); |
|
if (IS_ERR(inst->queue_state_debug_region)) |
|
return PTR_ERR(inst->queue_state_debug_region); |
|
|
|
if (desc->is_sproxy) { |
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
|
desc->ctrl_region_name); |
|
inst->queue_ctrl_region = devm_ioremap_resource(dev, res); |
|
if (IS_ERR(inst->queue_ctrl_region)) |
|
return PTR_ERR(inst->queue_ctrl_region); |
|
} |
|
|
|
dev_dbg(dev, "proxy region=%p, queue_state=%p\n", |
|
inst->queue_proxy_region, inst->queue_state_debug_region); |
|
|
|
queue_count = desc->num_valid_queues; |
|
if (!queue_count || queue_count > desc->queue_count) { |
|
dev_crit(dev, "Invalid Number of queues %d. Max %d\n", |
|
queue_count, desc->queue_count); |
|
return -ERANGE; |
|
} |
|
inst->num_valid_queues = queue_count; |
|
|
|
qinst = devm_kcalloc(dev, queue_count, sizeof(*qinst), GFP_KERNEL); |
|
if (!qinst) |
|
return -ENOMEM; |
|
inst->qinsts = qinst; |
|
|
|
chans = devm_kcalloc(dev, queue_count, sizeof(*chans), GFP_KERNEL); |
|
if (!chans) |
|
return -ENOMEM; |
|
inst->chans = chans; |
|
|
|
if (desc->is_sproxy) { |
|
struct ti_msgmgr_valid_queue_desc sproxy_desc; |
|
|
|
/* All proxies may be valid in Secure Proxy instance */ |
|
for (i = 0; i < queue_count; i++, qinst++, chans++) { |
|
sproxy_desc.queue_id = 0; |
|
sproxy_desc.proxy_id = i; |
|
ret = ti_msgmgr_queue_setup(i, dev, np, inst, |
|
desc, &sproxy_desc, qinst, |
|
chans); |
|
if (ret) |
|
return ret; |
|
} |
|
} else { |
|
/* Only Some proxies are valid in Message Manager */ |
|
for (i = 0, queue_desc = desc->valid_queues; |
|
i < queue_count; i++, qinst++, chans++, queue_desc++) { |
|
ret = ti_msgmgr_queue_setup(i, dev, np, inst, |
|
desc, queue_desc, qinst, |
|
chans); |
|
if (ret) |
|
return ret; |
|
} |
|
} |
|
|
|
mbox = &inst->mbox; |
|
mbox->dev = dev; |
|
mbox->ops = &ti_msgmgr_chan_ops; |
|
mbox->chans = inst->chans; |
|
mbox->num_chans = inst->num_valid_queues; |
|
mbox->txdone_irq = false; |
|
mbox->txdone_poll = desc->tx_polled; |
|
if (desc->tx_polled) |
|
mbox->txpoll_period = desc->tx_poll_timeout_ms; |
|
mbox->of_xlate = ti_msgmgr_of_xlate; |
|
|
|
platform_set_drvdata(pdev, inst); |
|
ret = devm_mbox_controller_register(dev, mbox); |
|
if (ret) |
|
dev_err(dev, "Failed to register mbox_controller(%d)\n", ret); |
|
|
|
return ret; |
|
} |
|
|
|
static struct platform_driver ti_msgmgr_driver = { |
|
.probe = ti_msgmgr_probe, |
|
.driver = { |
|
.name = "ti-msgmgr", |
|
.of_match_table = of_match_ptr(ti_msgmgr_of_match), |
|
}, |
|
}; |
|
module_platform_driver(ti_msgmgr_driver); |
|
|
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_DESCRIPTION("TI message manager driver"); |
|
MODULE_AUTHOR("Nishanth Menon"); |
|
MODULE_ALIAS("platform:ti-msgmgr");
|
|
|