1 // SPDX-License-Identifier: GPL-2.0+
3  * Texas Instruments' K3 Secure proxy Driver
5  * Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
13 #include <linux/soc/ti/k3-sec-proxy.h>
15 #include <mailbox-uclass.h>
19 /* SEC PROXY RT THREAD STATUS */
27 /* SEC PROXY SCFG THREAD CTRL */
37  * struct k3_sec_proxy_desc - Description of secure proxy integration.
55  * struct k3_sec_proxy_thread - Description of a secure proxy Thread
58  * @scfg:	Secure Config Region for Thread
71  * struct k3_sec_proxy_mbox - Description of a Secure Proxy Instance
75  * @target_data:	Secure Proxy region for Target Data
76  * @scfg:		Secure Proxy Region for Secure configuration.
77  * @rt:			Secure proxy Region for Real Time Region.
99  * k3_sec_proxy_of_xlate() - Translation of phandle to channel
109 	struct k3_sec_proxy_mbox *spm = dev_get_priv(chan->dev);  in k3_sec_proxy_of_xlate()
114 	if (args->args_count != 1) {  in k3_sec_proxy_of_xlate()
115 		debug("Invaild args_count: %d\n", args->args_count);  in k3_sec_proxy_of_xlate()
116 		return -EINVAL;  in k3_sec_proxy_of_xlate()
118 	ind = args->args[0];  in k3_sec_proxy_of_xlate()
120 	for (i = 0; i < spm->desc->num_valid_threads; i++)  in k3_sec_proxy_of_xlate()
121 		if (spm->chans[i].id == ind) {  in k3_sec_proxy_of_xlate()
122 			chan->id = ind;  in k3_sec_proxy_of_xlate()
123 			chan->con_priv = &spm->chans[i];  in k3_sec_proxy_of_xlate()
127 	dev_err(chan->dev, "%s: Invalid Thread ID %d\n", __func__, ind);  in k3_sec_proxy_of_xlate()
128 	return -ENOENT;  in k3_sec_proxy_of_xlate()
132  * k3_sec_proxy_request() - Request for mailbox channel
143  * k3_sec_proxy_free() - Free the mailbox channel
154  * k3_sec_proxy_verify_thread() - Verify thread status before
156  * @spt:	pointer to secure proxy thread description
165 	if (sp_readl(spt->rt, RT_THREAD_STATUS) &  in k3_sec_proxy_verify_thread()
168 		       __func__, spt->id);  in k3_sec_proxy_verify_thread()
169 		return -EINVAL;  in k3_sec_proxy_verify_thread()
173 	if ((sp_readl(spt->scfg, SCFG_THREAD_CTRL)  in k3_sec_proxy_verify_thread()
177 			       __func__, spt->id);  in k3_sec_proxy_verify_thread()
180 			       __func__, spt->id);  in k3_sec_proxy_verify_thread()
181 		return -EINVAL;  in k3_sec_proxy_verify_thread()
185 	if (!(sp_readl(spt->rt, RT_THREAD_STATUS) &  in k3_sec_proxy_verify_thread()
187 		return -ENODATA;  in k3_sec_proxy_verify_thread()
193  * k3_sec_proxy_send() - Send data via mailbox channel
202 	struct k3_sec_proxy_mbox *spm = dev_get_priv(chan->dev);  in k3_sec_proxy_send()
203 	struct k3_sec_proxy_thread *spt = chan->con_priv;  in k3_sec_proxy_send()
213 			__func__, spt->id, ret);  in k3_sec_proxy_send()
218 	if (msg->len > spm->desc->max_msg_size) {  in k3_sec_proxy_send()
220 		       __func__, chan->id, msg->len, spm->desc->max_msg_size);  in k3_sec_proxy_send()
221 		return -EINVAL;  in k3_sec_proxy_send()
225 	data_reg = spt->data + spm->desc->data_start_offset;  in k3_sec_proxy_send()
226 	for (num_words = msg->len / sizeof(u32), word_data = (u32 *)msg->buf;  in k3_sec_proxy_send()
228 	     num_words--, data_reg += sizeof(u32), word_data++)  in k3_sec_proxy_send()
231 	trail_bytes = msg->len % sizeof(u32);  in k3_sec_proxy_send()
236 		data_trail &= 0xFFFFFFFF >> (8 * (sizeof(u32) - trail_bytes));  in k3_sec_proxy_send()
245 	if (data_reg <= (spt->data + spm->desc->data_end_offset))  in k3_sec_proxy_send()
246 		sp_writel(spt->data, spm->desc->data_end_offset, 0);  in k3_sec_proxy_send()
249 	      __func__, chan->id);  in k3_sec_proxy_send()
255  * k3_sec_proxy_recv() - Receive data via mailbox channel
263 	struct k3_sec_proxy_mbox *spm = dev_get_priv(chan->dev);  in k3_sec_proxy_recv()
264 	struct k3_sec_proxy_thread *spt = chan->con_priv;  in k3_sec_proxy_recv()
276 	msg->len = spm->desc->max_msg_size;  in k3_sec_proxy_recv()
277 	msg->buf = spt->rx_buf;  in k3_sec_proxy_recv()
278 	data_reg = spt->data + spm->desc->data_start_offset;  in k3_sec_proxy_recv()
279 	word_data = spt->rx_buf;  in k3_sec_proxy_recv()
280 	for (num_words = spm->desc->max_msg_size / sizeof(u32);  in k3_sec_proxy_recv()
282 	     num_words--, data_reg += sizeof(u32), word_data++)  in k3_sec_proxy_recv()
286 	      __func__, chan->id);  in k3_sec_proxy_recv()
300  * k3_sec_proxy_of_to_priv() - generate private data from device tree
301  * @dev:	corresponding k3 secure proxy device
309 	const void *blob = gd->fdt_blob;  in k3_sec_proxy_of_to_priv()
312 		debug("'%s' no dt?\n", dev->name);  in k3_sec_proxy_of_to_priv()
313 		return -ENODEV;  in k3_sec_proxy_of_to_priv()
316 	spm->target_data = devfdt_get_addr_name(dev, "target_data");  in k3_sec_proxy_of_to_priv()
317 	if (spm->target_data == FDT_ADDR_T_NONE) {  in k3_sec_proxy_of_to_priv()
319 		return -EINVAL;  in k3_sec_proxy_of_to_priv()
322 	spm->scfg = devfdt_get_addr_name(dev, "scfg");  in k3_sec_proxy_of_to_priv()
323 	if (spm->rt == FDT_ADDR_T_NONE) {  in k3_sec_proxy_of_to_priv()
324 		dev_err(dev, "No reg property for Secure Cfg base\n");  in k3_sec_proxy_of_to_priv()
325 		return -EINVAL;  in k3_sec_proxy_of_to_priv()
328 	spm->rt = devfdt_get_addr_name(dev, "rt");  in k3_sec_proxy_of_to_priv()
329 	if (spm->rt == FDT_ADDR_T_NONE) {  in k3_sec_proxy_of_to_priv()
331 		return -EINVAL;  in k3_sec_proxy_of_to_priv()
338  * k3_sec_proxy_thread_setup - Initialize the parameters for all valid threads
348 	for (i = 0; i < spm->desc->num_valid_threads; i++) {  in k3_sec_proxy_thread_setup()
349 		spt = &spm->chans[i];  in k3_sec_proxy_thread_setup()
350 		ind = spm->desc->valid_threads[i];  in k3_sec_proxy_thread_setup()
351 		spt->id = ind;  in k3_sec_proxy_thread_setup()
352 		spt->data = (void *)SEC_PROXY_THREAD(spm->target_data, ind);  in k3_sec_proxy_thread_setup()
353 		spt->scfg = (void *)SEC_PROXY_THREAD(spm->scfg, ind);  in k3_sec_proxy_thread_setup()
354 		spt->rt = (void *)SEC_PROXY_THREAD(spm->rt, ind);  in k3_sec_proxy_thread_setup()
355 		spt->rx_buf = calloc(1, spm->desc->max_msg_size);  in k3_sec_proxy_thread_setup()
356 		if (!spt->rx_buf)  in k3_sec_proxy_thread_setup()
357 			return -ENOMEM;  in k3_sec_proxy_thread_setup()
364  * k3_sec_proxy_probe() - Basic probe
380 	spm->desc = (void *)dev_get_driver_data(dev);  in k3_sec_proxy_probe()
381 	spm->chans = calloc(spm->desc->num_valid_threads,  in k3_sec_proxy_probe()
383 	if (!spm->chans)  in k3_sec_proxy_probe()
384 		return -ENOMEM;  in k3_sec_proxy_probe()
388 		debug("%s: secure proxy thread setup failed\n", __func__);  in k3_sec_proxy_probe()
401 	free(spm->chans);  in k3_sec_proxy_remove()
426 	{ .compatible = "ti,am654-secure-proxy", .data = (ulong)&am654_desc},
431 	.name = "k3-secure-proxy",