drivers/mtd/mtdconcat.c

25  * Subdev points to an array of pointers to struct mtd_info objects
36  * how to calculate the size required for the above structure,
37  * including the pointer array subdev points to:
43  * Given a pointer to the MTD object in the mtd_concat structure,
44  * we can retrieve the pointer to that structure with this macro.
50  * effective address and pass through to the subdevice.
106 concat_panic_write(struct mtd_info *mtd, loff_t to, size_t len,
116 		if (to >= subdev->size) {
117 			to -= subdev->size;
120 		if (to + len > subdev->size)
121 			size = subdev->size - to;
125 		err = mtd_panic_write(subdev, to, size, &retsize, buf);
140 		to = 0;
147 concat_write(struct mtd_info *mtd, loff_t to, size_t len,
158 		if (to >= subdev->size) {
160 			to -= subdev->size;
163 		if (to + len > subdev->size)
164 			size = subdev->size - to;
168 		err = mtd_write(subdev, to, size, &retsize, buf);
179 		to = 0;
186 		unsigned long count, loff_t to, size_t * retlen)
201 		uint64_t __to = to;
216 		if (to >= subdev->size) {
217 			to -= subdev->size;
221 		size = min_t(uint64_t, total_len, subdev->size - to);
235 				 entry_high - entry_low + 1, to, &retsize);
252 		to = 0;
317 concat_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops)
331 		if (to >= subdev->size) {
332 			to -= subdev->size;
337 		if (to + devops.len > subdev->size)
338 			devops.len = subdev->size - to;
340 		err = mtd_write_oob(subdev, to, &devops);
358 		to = 0;
372 	 * Check for proper erase block alignment of the to-be-erased area.
373 	 * It is easier to do this based on the super device's erase
389 		 * Find the erase region where the to-be-erased area begins:
397 		 * to-be-erased area begins. Verify that the starting
398 		 * offset is aligned to this region's erase size:
404 		 * now find the erase region where the to-be-erased area ends:
411 		 * check if the ending offset is aligned to this region's erase size
418 	/* make a local copy of instr to avoid modifying the caller's struct */
428 	 * find the subdevice where the to-be-erased area begins, adjust
429 	 * starting offset to be relative to the subdevice start
450 		/* limit length to subdevice's size: */
466 		 * erase->addr specifies the offset of the area to be
469 		 * for the first subdevice where blocks need to be erased.
633  * num_devs MTD devices. A pointer to the new device object is
634  * stored to *new_dev upon success. This function does _not_
637 struct mtd_info *mtd_concat_create(struct mtd_info *subdev[],	/* subdevices to concatenate */
715 			 * Expect all flags except MTD_WRITEABLE to be
818 		 * space to store the data describing the variable erase regions