1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
14  *	partition 1: 4K config file (sector size)
22 /* controller page size, in bytes */
24 #define EP_PAGE_MASK (EP_PAGE_SIZE - 1)
62 	u32 buffer[EP_PAGE_DWORDS];  in read_length()  local
75 	 * command address range.  Note that '>' is correct below - the end  in read_length()
79 		return -EINVAL;  in read_length()
88 		read_page(dd, read_start, buffer);  in read_length()
91 		bytes = EP_PAGE_SIZE - start_offset;  in read_length()
95 			memcpy(dest, (u8 *)buffer + start_offset, len);  in read_length()
99 		memcpy(dest, (u8 *)buffer + start_offset, bytes);  in read_length()
102 		len -= bytes;  in read_length()
109 		read_page(dd, start, buffer);  in read_length()
110 		memcpy(dest, buffer, EP_PAGE_SIZE);  in read_length()
113 		len -= EP_PAGE_SIZE;  in read_length()
119 		read_page(dd, start, buffer);  in read_length()
120 		memcpy(dest, buffer, len);  in read_length()
134 	if (dd->pcidev->device != PCI_DEVICE_ID_INTEL0)  in eprom_init()
160 	dd->eprom_available = true;  in eprom_init()
175 /* segment size - 128 KiB */
179 	u32 oprom_size;		/* size of the oprom, in bytes */
188 	u32 size;		/* file size, in bytes */  member
193  * buffer of size 'dir_size'.
196 	(((dir_size) - sizeof(struct hfi1_eprom_footer)) / \
208  * the returned size if a trailing image magic is found.
211 					  u32 *size)  in read_partition_platform_config()  argument
213 	void *buffer;  in read_partition_platform_config()  local
218 	buffer = kmalloc(P1_SIZE, GFP_KERNEL);  in read_partition_platform_config()
219 	if (!buffer)  in read_partition_platform_config()
220 		return -ENOMEM;  in read_partition_platform_config()
222 	ret = read_length(dd, P1_START, P1_SIZE, buffer);  in read_partition_platform_config()
224 		kfree(buffer);  in read_partition_platform_config()
229 	if (memcmp(buffer, IMAGE_START_MAGIC, strlen(IMAGE_START_MAGIC))) {  in read_partition_platform_config()
230 		kfree(buffer);  in read_partition_platform_config()
231 		return -ENOENT;  in read_partition_platform_config()
235 	p = strnstr(buffer, IMAGE_TRAIL_MAGIC, P1_SIZE);  in read_partition_platform_config()
237 		length = p - buffer;  in read_partition_platform_config()
241 	*data = buffer;  in read_partition_platform_config()
242 	*size = length;  in read_partition_platform_config()
250  * directory is a u32 aligned buffer of size EP_PAGE_SIZE.
253 					void *directory, void **data, u32 *size)  in read_segment_platform_config()  argument
258 	void *buffer = NULL;  in read_segment_platform_config()  local
267 			(directory + EP_PAGE_SIZE - sizeof(*footer));  in read_segment_platform_config()
270 	if (footer->version != FOOTER_VERSION)  in read_segment_platform_config()
271 		return -EINVAL;  in read_segment_platform_config()
273 	/* oprom size cannot be larger than a segment */  in read_segment_platform_config()
274 	if (footer->oprom_size >= SEG_SIZE)  in read_segment_platform_config()
275 		return -EINVAL;  in read_segment_platform_config()
278 	if (footer->num_table_entries >  in read_segment_platform_config()
279 			MAX_TABLE_ENTRIES(SEG_SIZE - footer->oprom_size))  in read_segment_platform_config()
280 		return -EINVAL;  in read_segment_platform_config()
283 	directory_size = DIRECTORY_SIZE(footer->num_table_entries);  in read_segment_platform_config()
285 		/* the file table fits into the directory buffer handed in */  in read_segment_platform_config()
287 				(directory + EP_PAGE_SIZE - directory_size);  in read_segment_platform_config()
292 			return -ENOMEM;  in read_segment_platform_config()
293 		ret = read_length(dd, SEG_SIZE - directory_size,  in read_segment_platform_config()
301 	for (entry = NULL, i = 0; i < footer->num_table_entries; i++) {  in read_segment_platform_config()
308 		ret = -ENOENT;  in read_segment_platform_config()
313 	 * Sanity check on the configuration file size - it should never  in read_segment_platform_config()
316 	if (entry->size > (4 * 1024)) {  in read_segment_platform_config()
317 		dd_dev_err(dd, "Bad configuration file size 0x%x\n",  in read_segment_platform_config()
318 			   entry->size);  in read_segment_platform_config()
319 		ret = -EINVAL;  in read_segment_platform_config()
323 	/* check for bogus offset and size that wrap when added together */  in read_segment_platform_config()
324 	if (entry->offset + entry->size < entry->offset) {  in read_segment_platform_config()
326 			   "Bad configuration file start + size 0x%x+0x%x\n",  in read_segment_platform_config()
327 			   entry->offset, entry->size);  in read_segment_platform_config()
328 		ret = -EINVAL;  in read_segment_platform_config()
332 	/* allocate the buffer to return */  in read_segment_platform_config()
333 	buffer = kmalloc(entry->size, GFP_KERNEL);  in read_segment_platform_config()
334 	if (!buffer) {  in read_segment_platform_config()
335 		ret = -ENOMEM;  in read_segment_platform_config()
342 	seg_offset = entry->offset % SEG_SIZE;  in read_segment_platform_config()
343 	seg_base = entry->offset - seg_offset;  in read_segment_platform_config()
345 	while (ncopied < entry->size) {  in read_segment_platform_config()
349 		bytes_available = SEG_SIZE - seg_offset;  in read_segment_platform_config()
358 					   "Bad configuration file - offset 0x%x within footer+table\n",  in read_segment_platform_config()
359 					   entry->offset);  in read_segment_platform_config()
360 				ret = -EINVAL;  in read_segment_platform_config()
363 			bytes_available -= directory_size;  in read_segment_platform_config()
367 		to_copy = entry->size - ncopied;  in read_segment_platform_config()
376 		 * The sanity check for entry->offset is done in read_length().  in read_segment_platform_config()
384 				  buffer + ncopied);  in read_segment_platform_config()
391 		seg_offset = footer->oprom_size;  in read_segment_platform_config()
397 	*data = buffer;  in read_segment_platform_config()
398 	*size = entry->size;  in read_segment_platform_config()
403 		kfree(buffer);  in read_segment_platform_config()
410  * On success, an allocated buffer containing the data and its size are
411  * returned.  It is up to the caller to free this buffer.
414  *   0	      - success
415  *   -ENXIO   - no EPROM is available
416  *   -EBUSY   - not able to acquire access to the EPROM
417  *   -ENOENT  - no recognizable file written
418  *   -ENOMEM  - buffer could not be allocated
419  *   -EINVAL  - invalid EPROM contentents found
421 int eprom_read_platform_config(struct hfi1_devdata *dd, void **data, u32 *size)  in eprom_read_platform_config()  argument
423 	u32 directory[EP_PAGE_DWORDS]; /* aligned buffer */  in eprom_read_platform_config()
426 	if (!dd->eprom_available)  in eprom_read_platform_config()
427 		return -ENXIO;  in eprom_read_platform_config()
431 		return -EBUSY;  in eprom_read_platform_config()
434 	ret = read_length(dd, SEG_SIZE - EP_PAGE_SIZE, EP_PAGE_SIZE, directory);  in eprom_read_platform_config()
439 	if (directory[EP_PAGE_DWORDS - 1] == FOOTER_MAGIC) {  in eprom_read_platform_config()
441 		ret = read_segment_platform_config(dd, directory, data, size);  in eprom_read_platform_config()
444 		ret = read_partition_platform_config(dd, data, size);  in eprom_read_platform_config()