1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2016-2018, 2020, The Linux Foundation. All rights reserved. */
14 #include <soc/qcom/cmd-db.h>
24  * @id: resource's identifier
26  * @addr: the address of the resource
31 	u8 id[8];  member
39  * struct rsc_hdr: resource header information
41  * @slv_id: id for the resource
82  * based accelerator is a 'slave' (shared resource) and has slave id indicating
89  * Drivers have a stringified key to a slave/resource. They can query the slave
90  * information and get the slave id and the auxiliary data and the length of the
92  * h/w accelerator and request a resource state.
99 	const u8 *magic = header->magic;  in cmd_db_magic_matches()
108 	u16 offset = le16_to_cpu(hdr->header_offset);  in rsc_to_entry_header()
110 	return cmd_db_header->data + offset;  in rsc_to_entry_header()
116 	u16 offset = le16_to_cpu(hdr->data_offset);  in rsc_offset()
117 	u16 loffset = le16_to_cpu(ent->offset);  in rsc_offset()
119 	return cmd_db_header->data + offset + loffset;  in rsc_offset()
123  * cmd_db_ready - Indicates if command DB is available
130 		return -EPROBE_DEFER;  in cmd_db_ready()
132 		return -EINVAL;  in cmd_db_ready()
138 static int cmd_db_get_header(const char *id, const struct entry_header **eh,  in cmd_db_get_header()  argument
144 	u8 query[sizeof(ent->id)] __nonstring;  in cmd_db_get_header()
155 	strncpy(query, id, sizeof(query));  in cmd_db_get_header()
158 		rsc_hdr = &cmd_db_header->header[i];  in cmd_db_get_header()
159 		if (!rsc_hdr->slv_id)  in cmd_db_get_header()
163 		for (j = 0; j < le16_to_cpu(rsc_hdr->cnt); j++, ent++) {  in cmd_db_get_header()
164 			if (memcmp(ent->id, query, sizeof(ent->id)) == 0) {  in cmd_db_get_header()
174 	return -ENODEV;  in cmd_db_get_header()
178  * cmd_db_read_addr() - Query command db for resource id address.
180  * @id: resource id to query for address
182  * Return: resource address on success, 0 on error
184  * This is used to retrieve resource address based on resource
185  * id.
187 u32 cmd_db_read_addr(const char *id)  in cmd_db_read_addr()  argument
192 	ret = cmd_db_get_header(id, &ent, NULL);  in cmd_db_read_addr()
194 	return ret < 0 ? 0 : le32_to_cpu(ent->addr);  in cmd_db_read_addr()
199  * cmd_db_read_aux_data() - Query command db for aux data.
201  *  @id: Resource to retrieve AUX Data on
206 const void *cmd_db_read_aux_data(const char *id, size_t *len)  in cmd_db_read_aux_data()  argument
212 	ret = cmd_db_get_header(id, &ent, &rsc_hdr);  in cmd_db_read_aux_data()
217 		*len = le16_to_cpu(ent->len);  in cmd_db_read_aux_data()
224  * cmd_db_read_slave_id - Get the slave ID for a given resource address
226  * @id: Resource id to query the DB for version
230 enum cmd_db_hw_type cmd_db_read_slave_id(const char *id)  in cmd_db_read_slave_id()  argument
236 	ret = cmd_db_get_header(id, &ent, NULL);  in cmd_db_read_slave_id()
240 	addr = le32_to_cpu(ent->addr);  in cmd_db_read_slave_id()
258 		rsc = &cmd_db_header->header[i];  in cmd_db_debugfs_dump()
259 		if (!rsc->slv_id)  in cmd_db_debugfs_dump()
262 		switch (le16_to_cpu(rsc->slv_id)) {  in cmd_db_debugfs_dump()
277 		version = le16_to_cpu(rsc->version);  in cmd_db_debugfs_dump()
282 		seq_puts(seq, "-------------------------\n");  in cmd_db_debugfs_dump()
285 		for (j = 0; j < le16_to_cpu(rsc->cnt); j++, ent++) {  in cmd_db_debugfs_dump()
286 			seq_printf(seq, "0x%05x: %*pEp", le32_to_cpu(ent->addr),  in cmd_db_debugfs_dump()
287 				   (int)strnlen(ent->id, sizeof(ent->id)), ent->id);  in cmd_db_debugfs_dump()
289 			len = le16_to_cpu(ent->len);  in cmd_db_debugfs_dump()
303 	return single_open(file, cmd_db_debugfs_dump, inode->i_private);  in open_cmd_db_debugfs()
321 	rmem = of_reserved_mem_lookup(pdev->dev.of_node);  in cmd_db_dev_probe()
323 		dev_err(&pdev->dev, "failed to acquire memory region\n");  in cmd_db_dev_probe()
324 		return -EINVAL;  in cmd_db_dev_probe()
327 	cmd_db_header = memremap(rmem->base, rmem->size, MEMREMAP_WB);  in cmd_db_dev_probe()
329 		ret = -ENOMEM;  in cmd_db_dev_probe()
335 		dev_err(&pdev->dev, "Invalid Command DB Magic\n");  in cmd_db_dev_probe()
336 		return -EINVAL;  in cmd_db_dev_probe()
339 	debugfs_create_file("cmd-db", 0400, NULL, NULL, &cmd_db_debugfs_ops);  in cmd_db_dev_probe()
341 	device_set_pm_not_required(&pdev->dev);  in cmd_db_dev_probe()
347 	{ .compatible = "qcom,cmd-db" },
355 		   .name = "cmd-db",