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mailbox: Introduce K3 Secure Proxy Driver
Secure Proxy module manages hardware threads that are meant for communication between the processor entities. Adding support for this driver. Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
This commit is contained in:
Lokesh Vutla
Tom Rini
40
doc/device-tree-bindings/mailbox/k3-secure-proxy.txt
Normal file
40
doc/device-tree-bindings/mailbox/k3-secure-proxy.txt
Normal file
@@ -0,0 +1,40 @@
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Texas Instruments' K3 Secure Proxy
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===================================
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The Texas Instruments' K3 Secure Proxy is a mailbox controller that has
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configurable threads maintained by System power processor. Each thread
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has different address space that can be used to send or receive messages.
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Secure Proxy Device Node:
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===========================
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Required properties:
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--------------------
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- compatible: Shall be: "ti,am654-secure-proxy"
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- reg-names data - Map the data region
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scfg - Map the secure configuration region
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rt - Map the Realtime region.
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- reg: Contains the register map per reg-names.
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- #mbox-cells Shall be 1. Contains the thread ID.
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Example:
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--------
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secproxy: secproxy@285b0000 {
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compatible = "ti,am654-secure-proxy";
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reg = <0x2a380000 0x80000>,
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<0x2a400000 0x80000>,
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<0x2a480000 0x80000>;
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reg-names = "rt", "scfg", "data";
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#mbox-cells = <1>;
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};
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client:
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systemcontroller: systemcontroller {
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[...]
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# RX thread ID is 4.
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# TX thread ID is 5.
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mboxes= <&secproxy 4>,
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<&secproxy 5>;
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[...]
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};
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@@ -24,4 +24,14 @@ config TEGRA_HSP
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This enables support for the NVIDIA Tegra HSP Hw module, which
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implements doorbells, mailboxes, semaphores, and shared interrupts.
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config K3_SEC_PROXY
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bool "Texas Instruments K3 Secure Proxy Driver"
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depends on DM_MAILBOX && ARCH_K3
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help
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An implementation of Secure proxy slave driver for K3 SoCs from
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Texas Instruments. Secure proxy is a communication entity mainly
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used for communication between multiple processors with the SoC.
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Select this driver if your platform has support for this hardware
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block.
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endmenu
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@@ -6,3 +6,4 @@ obj-$(CONFIG_DM_MAILBOX) += mailbox-uclass.o
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obj-$(CONFIG_SANDBOX_MBOX) += sandbox-mbox.o
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obj-$(CONFIG_SANDBOX_MBOX) += sandbox-mbox-test.o
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obj-$(CONFIG_TEGRA_HSP) += tegra-hsp.o
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obj-$(CONFIG_K3_SEC_PROXY) += k3-sec-proxy.o
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438
drivers/mailbox/k3-sec-proxy.c
Normal file
438
drivers/mailbox/k3-sec-proxy.c
Normal file
@@ -0,0 +1,438 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Texas Instruments' K3 Secure proxy Driver
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*
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* Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
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* Lokesh Vutla <lokeshvutla@ti.com>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/soc/ti/k3-sec-proxy.h>
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#include <dm.h>
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#include <mailbox-uclass.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* SEC PROXY RT THREAD STATUS */
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#define RT_THREAD_STATUS 0x0
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#define RT_THREAD_THRESHOLD 0x4
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#define RT_THREAD_STATUS_ERROR_SHIFT 31
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#define RT_THREAD_STATUS_ERROR_MASK BIT(31)
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#define RT_THREAD_STATUS_CUR_CNT_SHIFT 0
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#define RT_THREAD_STATUS_CUR_CNT_MASK GENMASK(7, 0)
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/* SEC PROXY SCFG THREAD CTRL */
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#define SCFG_THREAD_CTRL 0x1000
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#define SCFG_THREAD_CTRL_DIR_SHIFT 31
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#define SCFG_THREAD_CTRL_DIR_MASK BIT(31)
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#define SEC_PROXY_THREAD(base, x) ((base) + (0x1000 * (x)))
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#define THREAD_IS_RX 1
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#define THREAD_IS_TX 0
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/**
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* struct k3_sec_proxy_desc - Description of secure proxy integration.
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* @thread_count: Number of Threads.
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* @max_msg_size: Message size in bytes.
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* @data_start_offset: Offset of the First data register of the thread
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* @data_end_offset: Offset of the Last data register of the thread
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* @valid_threads: List of Valid threads that the processor can access
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* @num_valid_threads: Number of valid threads.
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*/
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struct k3_sec_proxy_desc {
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u16 thread_count;
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u16 max_msg_size;
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u16 data_start_offset;
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u16 data_end_offset;
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const u32 *valid_threads;
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u32 num_valid_threads;
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};
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/**
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* struct k3_sec_proxy_thread - Description of a secure proxy Thread
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* @id: Thread ID
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* @data: Thread Data path region for target
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* @scfg: Secure Config Region for Thread
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* @rt: RealTime Region for Thread
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* @rx_buf: Receive buffer data, max message size.
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*/
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struct k3_sec_proxy_thread {
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u32 id;
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void __iomem *data;
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void __iomem *scfg;
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void __iomem *rt;
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u32 *rx_buf;
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};
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/**
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* struct k3_sec_proxy_mbox - Description of a Secure Proxy Instance
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* @chan: Mailbox Channel
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* @desc: Description of the SoC integration
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* @chans: Array for valid thread instances
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* @target_data: Secure Proxy region for Target Data
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* @scfg: Secure Proxy Region for Secure configuration.
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* @rt: Secure proxy Region for Real Time Region.
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*/
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struct k3_sec_proxy_mbox {
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struct mbox_chan chan;
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struct k3_sec_proxy_desc *desc;
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struct k3_sec_proxy_thread *chans;
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phys_addr_t target_data;
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phys_addr_t scfg;
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phys_addr_t rt;
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};
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static inline u32 sp_readl(void __iomem *addr, unsigned int offset)
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{
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return readl(addr + offset);
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}
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static inline void sp_writel(void __iomem *addr, unsigned int offset, u32 data)
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{
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writel(data, addr + offset);
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}
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/**
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* k3_sec_proxy_of_xlate() - Translation of phandle to channel
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* @chan: Mailbox channel
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* @args: Phandle Pointer
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*
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* Translates the phandle args and fills up the Mailbox channel from client.
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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 k3_sec_proxy_of_xlate(struct mbox_chan *chan,
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struct ofnode_phandle_args *args)
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{
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struct k3_sec_proxy_mbox *spm = dev_get_priv(chan->dev);
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int ind, i;
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debug("%s(chan=%p)\n", __func__, chan);
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if (args->args_count != 1) {
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debug("Invaild args_count: %d\n", args->args_count);
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return -EINVAL;
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}
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ind = args->args[0];
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for (i = 0; i < spm->desc->num_valid_threads; i++)
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if (spm->chans[i].id == ind) {
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chan->id = ind;
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chan->con_priv = &spm->chans[i];
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return 0;
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}
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dev_err(chan->dev, "%s: Invalid Thread ID %d\n", __func__, ind);
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return -ENOENT;
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}
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/**
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* k3_sec_proxy_request() - Request for mailbox channel
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* @chan: Channel Pointer
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*/
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static int k3_sec_proxy_request(struct mbox_chan *chan)
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{
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debug("%s(chan=%p)\n", __func__, chan);
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return 0;
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}
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/**
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* k3_sec_proxy_free() - Free the mailbox channel
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* @chan: Channel Pointer
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*/
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static int k3_sec_proxy_free(struct mbox_chan *chan)
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{
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debug("%s(chan=%p)\n", __func__, chan);
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return 0;
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}
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/**
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* k3_sec_proxy_verify_thread() - Verify thread status before
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* sending/receiving data.
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* @spt: pointer to secure proxy thread description
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* @dir: Direction of the thread
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*
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* Return: 0 if all goes good, else appropriate error message.
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*/
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static inline int k3_sec_proxy_verify_thread(struct k3_sec_proxy_thread *spt,
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u8 dir)
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{
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/* Check for any errors already available */
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if (sp_readl(spt->rt, RT_THREAD_STATUS) &
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RT_THREAD_STATUS_ERROR_MASK) {
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printf("%s: Thread %d is corrupted, cannot send data.\n",
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__func__, spt->id);
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return -EINVAL;
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}
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/* Make sure thread is configured for right direction */
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if ((sp_readl(spt->scfg, SCFG_THREAD_CTRL)
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& SCFG_THREAD_CTRL_DIR_MASK) >> SCFG_THREAD_CTRL_DIR_SHIFT != dir) {
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if (dir)
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printf("%s: Trying to receive data on tx Thread %d\n",
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__func__, spt->id);
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else
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printf("%s: Trying to send data on rx Thread %d\n",
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__func__, spt->id);
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return -EINVAL;
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}
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/* Check the message queue before sending/receiving data */
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if (!(sp_readl(spt->rt, RT_THREAD_STATUS) &
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RT_THREAD_STATUS_CUR_CNT_MASK))
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return -ENODATA;
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return 0;
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}
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/**
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* k3_sec_proxy_send() - Send data via mailbox channel
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* @chan: Channel Pointer
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* @data: Pointer to k3_sec_proxy_msg
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*
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* Return: 0 if all goes good, else appropriate error message.
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*/
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static int k3_sec_proxy_send(struct mbox_chan *chan, const void *data)
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{
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const struct k3_sec_proxy_msg *msg = (struct k3_sec_proxy_msg *)data;
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struct k3_sec_proxy_mbox *spm = dev_get_priv(chan->dev);
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struct k3_sec_proxy_thread *spt = chan->con_priv;
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int num_words, trail_bytes, ret;
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void __iomem *data_reg;
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u32 *word_data;
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debug("%s(chan=%p, data=%p)\n", __func__, chan, data);
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ret = k3_sec_proxy_verify_thread(spt, THREAD_IS_TX);
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if (ret) {
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dev_err(dev, "%s: Thread%d verification failed. ret = %d\n",
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__func__, spt->id, ret);
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return ret;
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}
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/* Check the message size. */
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if (msg->len > spm->desc->max_msg_size) {
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printf("%s: Thread %ld message length %zu > max msg size %d\n",
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__func__, chan->id, msg->len, spm->desc->max_msg_size);
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return -EINVAL;
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}
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/* Send the message */
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data_reg = spt->data + spm->desc->data_start_offset;
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for (num_words = msg->len / sizeof(u32), word_data = (u32 *)msg->buf;
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num_words;
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num_words--, data_reg += sizeof(u32), word_data++)
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writel(*word_data, data_reg);
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trail_bytes = msg->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 <= (spt->data + spm->desc->data_end_offset))
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sp_writel(spt->data, spm->desc->data_end_offset, 0);
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debug("%s: Message successfully sent on thread %ld\n",
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__func__, chan->id);
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return 0;
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}
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/**
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* k3_sec_proxy_recv() - Receive data via mailbox channel
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* @chan: Channel Pointer
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* @data: Pointer to k3_sec_proxy_msg
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*
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* Return: 0 if all goes good, else appropriate error message.
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*/
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static int k3_sec_proxy_recv(struct mbox_chan *chan, void *data)
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{
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struct k3_sec_proxy_mbox *spm = dev_get_priv(chan->dev);
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struct k3_sec_proxy_thread *spt = chan->con_priv;
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struct k3_sec_proxy_msg *msg = data;
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void __iomem *data_reg;
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int num_words, ret;
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u32 *word_data;
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debug("%s(chan=%p, data=%p)\n", __func__, chan, data);
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ret = k3_sec_proxy_verify_thread(spt, THREAD_IS_RX);
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if (ret)
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return ret;
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msg->len = spm->desc->max_msg_size;
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msg->buf = spt->rx_buf;
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data_reg = spt->data + spm->desc->data_start_offset;
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word_data = spt->rx_buf;
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for (num_words = spm->desc->max_msg_size / sizeof(u32);
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num_words;
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num_words--, data_reg += sizeof(u32), word_data++)
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*word_data = readl(data_reg);
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debug("%s: Message successfully received from thread %ld\n",
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__func__, chan->id);
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return 0;
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}
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|
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struct mbox_ops k3_sec_proxy_mbox_ops = {
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.of_xlate = k3_sec_proxy_of_xlate,
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.request = k3_sec_proxy_request,
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.free = k3_sec_proxy_free,
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.send = k3_sec_proxy_send,
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.recv = k3_sec_proxy_recv,
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};
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/**
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* k3_sec_proxy_of_to_priv() - generate private data from device tree
|
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* @dev: corresponding k3 secure proxy device
|
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* @spm: pointer to driver specific private data
|
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*
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* Return: 0 if all went ok, else corresponding error message.
|
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*/
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static int k3_sec_proxy_of_to_priv(struct udevice *dev,
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struct k3_sec_proxy_mbox *spm)
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{
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const void *blob = gd->fdt_blob;
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if (!blob) {
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debug("'%s' no dt?\n", dev->name);
|
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return -ENODEV;
|
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}
|
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spm->target_data = devfdt_get_addr_name(dev, "target_data");
|
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if (spm->target_data == FDT_ADDR_T_NONE) {
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dev_err(dev, "No reg property for target data base\n");
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return -EINVAL;
|
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}
|
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|
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spm->scfg = devfdt_get_addr_name(dev, "scfg");
|
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if (spm->rt == FDT_ADDR_T_NONE) {
|
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dev_err(dev, "No reg property for Secure Cfg base\n");
|
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return -EINVAL;
|
||||
}
|
||||
|
||||
spm->rt = devfdt_get_addr_name(dev, "rt");
|
||||
if (spm->rt == FDT_ADDR_T_NONE) {
|
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dev_err(dev, "No reg property for Real Time Cfg base\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
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* k3_sec_proxy_thread_setup - Initialize the parameters for all valid threads
|
||||
* @spm: Mailbox instance for which threads needs to be initialized
|
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*
|
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* Return: 0 if all went ok, else corresponding error message
|
||||
*/
|
||||
static int k3_sec_proxy_thread_setup(struct k3_sec_proxy_mbox *spm)
|
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{
|
||||
struct k3_sec_proxy_thread *spt;
|
||||
int i, ind;
|
||||
|
||||
for (i = 0; i < spm->desc->num_valid_threads; i++) {
|
||||
spt = &spm->chans[i];
|
||||
ind = spm->desc->valid_threads[i];
|
||||
spt->id = ind;
|
||||
spt->data = (void *)SEC_PROXY_THREAD(spm->target_data, ind);
|
||||
spt->scfg = (void *)SEC_PROXY_THREAD(spm->scfg, ind);
|
||||
spt->rt = (void *)SEC_PROXY_THREAD(spm->rt, ind);
|
||||
spt->rx_buf = calloc(1, spm->desc->max_msg_size);
|
||||
if (!spt->rx_buf)
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* k3_sec_proxy_probe() - Basic probe
|
||||
* @dev: corresponding mailbox device
|
||||
*
|
||||
* Return: 0 if all went ok, else corresponding error message
|
||||
*/
|
||||
static int k3_sec_proxy_probe(struct udevice *dev)
|
||||
{
|
||||
struct k3_sec_proxy_mbox *spm = dev_get_priv(dev);
|
||||
int ret;
|
||||
|
||||
debug("%s(dev=%p)\n", __func__, dev);
|
||||
|
||||
ret = k3_sec_proxy_of_to_priv(dev, spm);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
spm->desc = (void *)dev_get_driver_data(dev);
|
||||
spm->chans = calloc(spm->desc->num_valid_threads,
|
||||
sizeof(struct k3_sec_proxy_thread));
|
||||
if (!spm->chans)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = k3_sec_proxy_thread_setup(spm);
|
||||
if (ret) {
|
||||
debug("%s: secure proxy thread setup failed\n", __func__);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int k3_sec_proxy_remove(struct udevice *dev)
|
||||
{
|
||||
struct k3_sec_proxy_mbox *spm = dev_get_priv(dev);
|
||||
|
||||
debug("%s(dev=%p)\n", __func__, dev);
|
||||
|
||||
free(spm->chans);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Thread ID #4: ROM request
|
||||
* Thread ID #5: ROM response, SYSFW notify
|
||||
* Thread ID #6: SYSFW request response
|
||||
* Thread ID #7: SYSFW request high priority
|
||||
* Thread ID #8: SYSFW request low priority
|
||||
* Thread ID #9: SYSFW notify response
|
||||
*/
|
||||
static const u32 am6x_valid_threads[] = { 4, 5, 6, 7, 8, 9, 11, 13 };
|
||||
|
||||
static const struct k3_sec_proxy_desc am654_desc = {
|
||||
.thread_count = 90,
|
||||
.max_msg_size = 60,
|
||||
.data_start_offset = 0x4,
|
||||
.data_end_offset = 0x3C,
|
||||
.valid_threads = am6x_valid_threads,
|
||||
.num_valid_threads = ARRAY_SIZE(am6x_valid_threads),
|
||||
};
|
||||
|
||||
static const struct udevice_id k3_sec_proxy_ids[] = {
|
||||
{ .compatible = "ti,am654-secure-proxy", .data = (ulong)&am654_desc},
|
||||
{ }
|
||||
};
|
||||
|
||||
U_BOOT_DRIVER(k3_sec_proxy) = {
|
||||
.name = "k3-secure-proxy",
|
||||
.id = UCLASS_MAILBOX,
|
||||
.of_match = k3_sec_proxy_ids,
|
||||
.probe = k3_sec_proxy_probe,
|
||||
.remove = k3_sec_proxy_remove,
|
||||
.priv_auto_alloc_size = sizeof(struct k3_sec_proxy_mbox),
|
||||
.ops = &k3_sec_proxy_mbox_ops,
|
||||
};
|
||||
25
include/linux/soc/ti/k3-sec-proxy.h
Normal file
25
include/linux/soc/ti/k3-sec-proxy.h
Normal file
@@ -0,0 +1,25 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0+ */
|
||||
/*
|
||||
* Texas Instruments' K3 Secure proxy
|
||||
*
|
||||
* Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
|
||||
* Lokesh Vutla <lokeshvutla@ti.com>
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef K3_SEC_PROXY_H
|
||||
#define K3_SEC_PROXY_H
|
||||
|
||||
/**
|
||||
* struct k3_sec_proxy_msg - Secure proxy message structure
|
||||
* @len: Length of data in the Buffer
|
||||
* @buf: Buffer pointer
|
||||
*
|
||||
* This is the structure for data used in mbox_send() and mbox_recv().
|
||||
*/
|
||||
struct k3_sec_proxy_msg {
|
||||
size_t len;
|
||||
u32 *buf;
|
||||
};
|
||||
|
||||
#endif /* K3_SEC_PROXY_H */
|
||||
Reference in New Issue
Block a user