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@@ -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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+
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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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+
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+DECLARE_GLOBAL_DATA_PTR;
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+
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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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+
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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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+
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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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+/**
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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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+/**
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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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+/**
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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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+
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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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+
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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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+/**
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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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+
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+ debug("%s(chan=%p)\n", __func__, chan);
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+
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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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+
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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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+
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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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+/**
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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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+
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+ return 0;
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+}
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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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+
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+ return 0;
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+}
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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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+
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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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+
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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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+
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+ return 0;
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+}
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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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+
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+ debug("%s(chan=%p, data=%p)\n", __func__, chan, data);
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+
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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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+
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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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+
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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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+
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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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+
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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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+ /*
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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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+
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+ debug("%s: Message successfully sent on thread %ld\n",
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+ __func__, chan->id);
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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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+ * 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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+
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+ debug("%s(chan=%p, data=%p)\n", __func__, chan, data);
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+
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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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+
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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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+
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+ debug("%s: Message successfully received from thread %ld\n",
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+ __func__, chan->id);
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+
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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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+/**
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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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+
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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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+
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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;
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+ }
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+
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+ spm->rt = devfdt_get_addr_name(dev, "rt");
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+ if (spm->rt == FDT_ADDR_T_NONE) {
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+ dev_err(dev, "No reg property for Real Time Cfg base\n");
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+ return -EINVAL;
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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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+ * k3_sec_proxy_thread_setup - Initialize the parameters for all valid threads
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+ * @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
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+ */
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+static int k3_sec_proxy_thread_setup(struct k3_sec_proxy_mbox *spm)
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+{
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+ struct k3_sec_proxy_thread *spt;
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+ int i, ind;
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+
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+ for (i = 0; i < spm->desc->num_valid_threads; i++) {
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+ spt = &spm->chans[i];
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+ ind = spm->desc->valid_threads[i];
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+ spt->id = ind;
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+ spt->data = (void *)SEC_PROXY_THREAD(spm->target_data, ind);
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+ spt->scfg = (void *)SEC_PROXY_THREAD(spm->scfg, ind);
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+ spt->rt = (void *)SEC_PROXY_THREAD(spm->rt, ind);
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+ spt->rx_buf = calloc(1, spm->desc->max_msg_size);
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+ if (!spt->rx_buf)
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+ return -ENOMEM;
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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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+ * k3_sec_proxy_probe() - Basic probe
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+ * @dev: corresponding mailbox device
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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_probe(struct udevice *dev)
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+{
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+ struct k3_sec_proxy_mbox *spm = dev_get_priv(dev);
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+ int ret;
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+
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+ debug("%s(dev=%p)\n", __func__, dev);
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+
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+ ret = k3_sec_proxy_of_to_priv(dev, spm);
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+ if (ret)
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+ return ret;
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+
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+ spm->desc = (void *)dev_get_driver_data(dev);
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+ spm->chans = calloc(spm->desc->num_valid_threads,
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+ sizeof(struct k3_sec_proxy_thread));
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+ if (!spm->chans)
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+ return -ENOMEM;
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+
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+ ret = k3_sec_proxy_thread_setup(spm);
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+ if (ret) {
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+ debug("%s: secure proxy thread setup failed\n", __func__);
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+ return ret;
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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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+static int k3_sec_proxy_remove(struct udevice *dev)
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|
|
+{
|
|
|
+ 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,
|
|
|
+};
|