sm_ftl.c revision 58a69cb47ec6991bf006a3e5d202e8571b0327a4
17d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* 27d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * Copyright © 2009 - Maxim Levitsky 37d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * SmartMedia/xD translation layer 47d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * 57d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * This program is free software; you can redistribute it and/or modify 67d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * it under the terms of the GNU General Public License version 2 as 77d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * published by the Free Software Foundation. 87d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky */ 97d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include <linux/kernel.h> 117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include <linux/module.h> 127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include <linux/random.h> 137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include <linux/hdreg.h> 147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include <linux/kthread.h> 157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include <linux/freezer.h> 167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include <linux/sysfs.h> 177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include <linux/bitops.h> 188da552f26107f55186346cff280ec9d53cc42addStephen Rothwell#include <linux/slab.h> 1901de69c2b0e471844193532a85c173f51d9ea6b2Maxim Levitsky#include <linux/mtd/nand_ecc.h> 207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include "nand/sm_common.h" 217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#include "sm_ftl.h" 227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystruct workqueue_struct *cache_flush_workqueue; 267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int cache_timeout = 1000; 287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskymodule_param(cache_timeout, bool, S_IRUGO); 297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim LevitskyMODULE_PARM_DESC(cache_timeout, 307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky "Timeout (in ms) for cache flush (1000 ms default"); 317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int debug; 337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskymodule_param(debug, int, S_IRUGO | S_IWUSR); 347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim LevitskyMODULE_PARM_DESC(debug, "Debug level (0-2)"); 357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* ------------------- sysfs attributtes ---------------------------------- */ 387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystruct sm_sysfs_attribute { 397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct device_attribute dev_attr; 407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky char *data; 417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int len; 427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky}; 437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyssize_t sm_attr_show(struct device *dev, struct device_attribute *attr, 457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky char *buf) 467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_sysfs_attribute *sm_attr = 487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky container_of(attr, struct sm_sysfs_attribute, dev_attr); 497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky strncpy(buf, sm_attr->data, sm_attr->len); 517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return sm_attr->len; 527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#define NUM_ATTRIBUTES 1 567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky#define SM_CIS_VENDOR_OFFSET 0x59 577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystruct attribute_group *sm_create_sysfs_attributes(struct sm_ftl *ftl) 587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct attribute_group *attr_group; 607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct attribute **attributes; 617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_sysfs_attribute *vendor_attribute; 627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int vendor_len = strnlen(ftl->cis_buffer + SM_CIS_VENDOR_OFFSET, 647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky SM_SMALL_PAGE - SM_CIS_VENDOR_OFFSET); 657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky char *vendor = kmalloc(vendor_len, GFP_KERNEL); 677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky memcpy(vendor, ftl->cis_buffer + SM_CIS_VENDOR_OFFSET, vendor_len); 687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky vendor[vendor_len] = 0; 697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Initialize sysfs attributes */ 717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky vendor_attribute = 727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kzalloc(sizeof(struct sm_sysfs_attribute), GFP_KERNEL); 737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 74ca7081d96e39ea276892f0577f9cf37568547e88Maxim Levitsky sysfs_attr_init(&vendor_attribute->dev_attr.attr); 75ca7081d96e39ea276892f0577f9cf37568547e88Maxim Levitsky 767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky vendor_attribute->data = vendor; 777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky vendor_attribute->len = vendor_len; 787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky vendor_attribute->dev_attr.attr.name = "vendor"; 797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky vendor_attribute->dev_attr.attr.mode = S_IRUGO; 807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky vendor_attribute->dev_attr.show = sm_attr_show; 817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Create array of pointers to the attributes */ 847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky attributes = kzalloc(sizeof(struct attribute *) * (NUM_ATTRIBUTES + 1), 857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky GFP_KERNEL); 867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky attributes[0] = &vendor_attribute->dev_attr.attr; 877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Finally create the attribute group */ 897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky attr_group = kzalloc(sizeof(struct attribute_group), GFP_KERNEL); 907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky attr_group->attrs = attributes; 917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return attr_group; 927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyvoid sm_delete_sysfs_attributes(struct sm_ftl *ftl) 957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct attribute **attributes = ftl->disk_attributes->attrs; 977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int i; 987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky for (i = 0; attributes[i] ; i++) { 1007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct device_attribute *dev_attr = container_of(attributes[i], 1027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct device_attribute, attr); 1037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_sysfs_attribute *sm_attr = 1057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky container_of(dev_attr, 1067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_sysfs_attribute, dev_attr); 1077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(sm_attr->data); 1097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(sm_attr); 1107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 1117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl->disk_attributes->attrs); 1137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl->disk_attributes); 1147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 1157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* ----------------------- oob helpers -------------------------------------- */ 1187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_get_lba(uint8_t *lba) 1207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 1217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* check fixed bits */ 1227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if ((lba[0] & 0xF8) != 0x10) 1237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -2; 1247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* check parity - endianess doesn't matter */ 1267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (hweight16(*(uint16_t *)lba) & 1) 1277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -2; 1287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return (lba[1] >> 1) | ((lba[0] & 0x07) << 7); 1307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 1317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* 1347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * Read LBA asscociated with block 1357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * returns -1, if block is erased 1367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * returns -2 if error happens 1377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky */ 1387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_read_lba(struct sm_oob *oob) 1397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 1407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky static const uint32_t erased_pattern[4] = { 1417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF }; 1427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky uint16_t lba_test; 1447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int lba; 1457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* First test for erased block */ 1477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!memcmp(oob, erased_pattern, SM_OOB_SIZE)) 1487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -1; 1497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Now check is both copies of the LBA differ too much */ 1517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky lba_test = *(uint16_t *)oob->lba_copy1 ^ *(uint16_t*)oob->lba_copy2; 1527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (lba_test && !is_power_of_2(lba_test)) 1537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -2; 1547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* And read it */ 1567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky lba = sm_get_lba(oob->lba_copy1); 1577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (lba == -2) 1597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky lba = sm_get_lba(oob->lba_copy2); 1607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return lba; 1627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 1637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic void sm_write_lba(struct sm_oob *oob, uint16_t lba) 1657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 1667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky uint8_t tmp[2]; 1677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky WARN_ON(lba >= 1000); 1697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky tmp[0] = 0x10 | ((lba >> 7) & 0x07); 1717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky tmp[1] = (lba << 1) & 0xFF; 1727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (hweight16(*(uint16_t *)tmp) & 0x01) 1747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky tmp[1] |= 1; 1757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky oob->lba_copy1[0] = oob->lba_copy2[0] = tmp[0]; 1777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky oob->lba_copy1[1] = oob->lba_copy2[1] = tmp[1]; 1787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 1797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Make offset from parts */ 1827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic loff_t sm_mkoffset(struct sm_ftl *ftl, int zone, int block, int boffset) 1837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 1847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky WARN_ON(boffset & (SM_SECTOR_SIZE - 1)); 1857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky WARN_ON(zone < 0 || zone >= ftl->zone_count); 1867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky WARN_ON(block >= ftl->zone_size); 1877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky WARN_ON(boffset >= ftl->block_size); 1887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (block == -1) 1907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -1; 1917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return (zone * SM_MAX_ZONE_SIZE + block) * ftl->block_size + boffset; 1937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 1947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 1957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Breaks offset into parts */ 1967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic void sm_break_offset(struct sm_ftl *ftl, loff_t offset, 1977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int *zone, int *block, int *boffset) 1987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 1997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky *boffset = do_div(offset, ftl->block_size); 2007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky *block = do_div(offset, ftl->max_lba); 2017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky *zone = offset >= ftl->zone_count ? -1 : offset; 2027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 2037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* ---------------------- low level IO ------------------------------------- */ 2057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_correct_sector(uint8_t *buffer, struct sm_oob *oob) 2077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 2087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky uint8_t ecc[3]; 2097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky __nand_calculate_ecc(buffer, SM_SMALL_PAGE, ecc); 2117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (__nand_correct_data(buffer, ecc, oob->ecc1, SM_SMALL_PAGE) < 0) 2127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 2137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky buffer += SM_SMALL_PAGE; 2157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky __nand_calculate_ecc(buffer, SM_SMALL_PAGE, ecc); 2177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (__nand_correct_data(buffer, ecc, oob->ecc2, SM_SMALL_PAGE) < 0) 2187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 2197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 2207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 2217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Reads a sector + oob*/ 2237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_read_sector(struct sm_ftl *ftl, 2247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int zone, int block, int boffset, 2257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky uint8_t *buffer, struct sm_oob *oob) 2267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 2277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct mtd_info *mtd = ftl->trans->mtd; 2287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct mtd_oob_ops ops; 2297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_oob tmp_oob; 230133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky int ret = -EIO; 2317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int try = 0; 2327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* FTL can contain -1 entries that are by default filled with bits */ 2347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (block == -1) { 2357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky memset(buffer, 0xFF, SM_SECTOR_SIZE); 2367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 2377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 2387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* User might not need the oob, but we do for data vertification */ 2407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!oob) 2417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky oob = &tmp_oob; 2427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.mode = ftl->smallpagenand ? MTD_OOB_RAW : MTD_OOB_PLACE; 2447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.ooboffs = 0; 2457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.ooblen = SM_OOB_SIZE; 2467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.oobbuf = (void *)oob; 2477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.len = SM_SECTOR_SIZE; 2487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.datbuf = buffer; 2497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyagain: 2517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (try++) { 2527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Avoid infinite recursion on CIS reads, sm_recheck_media 2537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky won't help anyway */ 2547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (zone == 0 && block == ftl->cis_block && boffset == 2557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cis_boffset) 2567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return ret; 2577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Test if media is stable */ 2597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (try == 3 || sm_recheck_media(ftl)) 2607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return ret; 2617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 2627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Unfortunelly, oob read will _always_ succeed, 2647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky despite card removal..... */ 2657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ret = mtd->read_oob(mtd, sm_mkoffset(ftl, zone, block, boffset), &ops); 2667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Test for unknown errors */ 2687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ret != 0 && ret != -EUCLEAN && ret != -EBADMSG) { 2697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("read of block %d at zone %d, failed due to error (%d)", 2707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky block, zone, ret); 2717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto again; 2727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 2737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Do a basic test on the oob, to guard against returned garbage */ 2757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (oob->reserved != 0xFFFFFFFF && !is_power_of_2(~oob->reserved)) 2767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto again; 2777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* This should never happen, unless there is a bug in the mtd driver */ 2797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky WARN_ON(ops.oobretlen != SM_OOB_SIZE); 2807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky WARN_ON(buffer && ops.retlen != SM_SECTOR_SIZE); 2817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!buffer) 2837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 2847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Test if sector marked as bad */ 2867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!sm_sector_valid(oob)) { 2877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("read of block %d at zone %d, failed because it is marked" 2887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky " as bad" , block, zone); 2897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto again; 2907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 2917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Test ECC*/ 2937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ret == -EBADMSG || 2947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky (ftl->smallpagenand && sm_correct_sector(buffer, oob))) { 2957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 2967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("read of block %d at zone %d, failed due to ECC error", 2977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky block, zone); 2987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto again; 2997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 3007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 3027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 3037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Writes a sector to media */ 3057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_write_sector(struct sm_ftl *ftl, 3067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int zone, int block, int boffset, 3077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky uint8_t *buffer, struct sm_oob *oob) 3087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 3097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct mtd_oob_ops ops; 3107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct mtd_info *mtd = ftl->trans->mtd; 3117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int ret; 3127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky BUG_ON(ftl->readonly); 3147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (zone == 0 && (block == ftl->cis_block || block == 0)) { 3167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("attempted to write the CIS!"); 3177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 3187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 3197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->unstable) 3217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 3227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.mode = ftl->smallpagenand ? MTD_OOB_RAW : MTD_OOB_PLACE; 3247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.len = SM_SECTOR_SIZE; 3257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.datbuf = buffer; 3267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.ooboffs = 0; 3277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.ooblen = SM_OOB_SIZE; 3287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ops.oobbuf = (void *)oob; 3297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ret = mtd->write_oob(mtd, sm_mkoffset(ftl, zone, block, boffset), &ops); 3317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Now we assume that hardware will catch write bitflip errors */ 3337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* If you are paranoid, use CONFIG_MTD_NAND_VERIFY_WRITE */ 3347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ret) { 3367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("write to block %d at zone %d, failed with error %d", 3377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky block, zone, ret); 3387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_recheck_media(ftl); 3407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return ret; 3417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 3427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* This should never happen, unless there is a bug in the driver */ 3447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky WARN_ON(ops.oobretlen != SM_OOB_SIZE); 3457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky WARN_ON(buffer && ops.retlen != SM_SECTOR_SIZE); 3467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 3487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 3497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* ------------------------ block IO ------------------------------------- */ 3517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Write a block using data and lba, and invalid sector bitmap */ 3537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_write_block(struct sm_ftl *ftl, uint8_t *buf, 3547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int zone, int block, int lba, 3557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky unsigned long invalid_bitmap) 3567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 3577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_oob oob; 3587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int boffset; 3597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int retry = 0; 3607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Initialize the oob with requested values */ 3627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky memset(&oob, 0xFF, SM_OOB_SIZE); 3637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_write_lba(&oob, lba); 3647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyrestart: 3657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->unstable) 3667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 3677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky for (boffset = 0; boffset < ftl->block_size; 3697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky boffset += SM_SECTOR_SIZE) { 3707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky oob.data_status = 0xFF; 3727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (test_bit(boffset / SM_SECTOR_SIZE, &invalid_bitmap)) { 3747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("sector %d of block at LBA %d of zone %d" 3767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky " coudn't be read, marking it as invalid", 3777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky boffset / SM_SECTOR_SIZE, lba, zone); 3787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky oob.data_status = 0; 3807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 3817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->smallpagenand) { 3837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky __nand_calculate_ecc(buf + boffset, 3847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky SM_SMALL_PAGE, oob.ecc1); 3857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky __nand_calculate_ecc(buf + boffset + SM_SMALL_PAGE, 3877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky SM_SMALL_PAGE, oob.ecc2); 3887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 3897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!sm_write_sector(ftl, zone, block, boffset, 3907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky buf + boffset, &oob)) 3917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 3927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!retry) { 3947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 3957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* If write fails. try to erase the block */ 3967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* This is safe, because we never write in blocks 3977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky that contain valuable data. 3987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky This is intended to repair block that are marked 3997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky as erased, but that isn't fully erased*/ 4007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_erase_block(ftl, zone, block, 0)) 4027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 4037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky retry = 1; 4057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto restart; 4067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } else { 4077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_mark_block_bad(ftl, zone, block); 4087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 4097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 4107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 4117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 4127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 4137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Mark whole block at offset 'offs' as bad. */ 4167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic void sm_mark_block_bad(struct sm_ftl *ftl, int zone, int block) 4177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 4187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_oob oob; 4197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int boffset; 4207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky memset(&oob, 0xFF, SM_OOB_SIZE); 4227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky oob.block_status = 0xF0; 4237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->unstable) 4257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return; 4267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_recheck_media(ftl)) 4287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return; 4297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("marking block %d of zone %d as bad", block, zone); 4317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* We aren't checking the return value, because we don't care */ 4337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* This also fails on fake xD cards, but I guess these won't expose 4347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky any bad blocks till fail completly */ 4357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky for (boffset = 0; boffset < ftl->block_size; boffset += SM_SECTOR_SIZE) 4367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_write_sector(ftl, zone, block, boffset, NULL, &oob); 4377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 4387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* 4407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * Erase a block within a zone 4417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * If erase succedes, it updates free block fifo, otherwise marks block as bad 4427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky */ 4437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block, 4447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int put_free) 4457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 4467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct ftl_zone *zone = &ftl->zones[zone_num]; 4477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct mtd_info *mtd = ftl->trans->mtd; 4487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct erase_info erase; 4497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky erase.mtd = mtd; 4517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky erase.callback = sm_erase_callback; 4527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky erase.addr = sm_mkoffset(ftl, zone_num, block, 0); 4537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky erase.len = ftl->block_size; 4547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky erase.priv = (u_long)ftl; 4557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->unstable) 4577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 4587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky BUG_ON(ftl->readonly); 4607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (zone_num == 0 && (block == ftl->cis_block || block == 0)) { 4627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("attempted to erase the CIS!"); 4637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 4647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 4657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (mtd->erase(mtd, &erase)) { 4677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("erase of block %d in zone %d failed", 4687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky block, zone_num); 4697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error; 4707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 4717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (erase.state == MTD_ERASE_PENDING) 4737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky wait_for_completion(&ftl->erase_completion); 4747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (erase.state != MTD_ERASE_DONE) { 4767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("erase of block %d in zone %d failed after wait", 4777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky block, zone_num); 4787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error; 4797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 4807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (put_free) 4827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfifo_in(&zone->free_sectors, 4837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky (const unsigned char *)&block, sizeof(block)); 4847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 4867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyerror: 4877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_mark_block_bad(ftl, zone_num, block); 4887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 4897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 4907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic void sm_erase_callback(struct erase_info *self) 4927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 4937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl = (struct sm_ftl *)self->priv; 4947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky complete(&ftl->erase_completion); 4957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 4967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 4977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Throughtly test that block is valid. */ 4987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_check_block(struct sm_ftl *ftl, int zone, int block) 4997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 5007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int boffset; 5017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_oob oob; 5027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int lbas[] = { -3, 0, 0, 0 }; 5037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int i = 0; 5047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int test_lba; 5057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* First just check that block doesn't look fishy */ 5087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Only blocks that are valid or are sliced in two parts, are 5097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky accepted */ 5107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky for (boffset = 0; boffset < ftl->block_size; 5117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky boffset += SM_SECTOR_SIZE) { 5127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* This shoudn't happen anyway */ 5147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_read_sector(ftl, zone, block, boffset, NULL, &oob)) 5157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -2; 5167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky test_lba = sm_read_lba(&oob); 5187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (lbas[i] != test_lba) 5207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky lbas[++i] = test_lba; 5217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* If we found three different LBAs, something is fishy */ 5237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (i == 3) 5247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 5257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 5267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* If the block is sliced (partialy erased usually) erase it */ 5287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (i == 2) { 5297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_erase_block(ftl, zone, block, 1); 5307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 1; 5317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 5327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 5347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 5357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* ----------------- media scanning --------------------------------- */ 5377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic const struct chs_entry chs_table[] = { 5387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 1, 125, 4, 4 }, 5397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 2, 125, 4, 8 }, 5407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 4, 250, 4, 8 }, 5417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 8, 250, 4, 16 }, 5427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 16, 500, 4, 16 }, 5437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 32, 500, 8, 16 }, 5447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 64, 500, 8, 32 }, 5457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 128, 500, 16, 32 }, 5467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 256, 1000, 16, 32 }, 5477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 512, 1015, 32, 63 }, 5487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 1024, 985, 33, 63 }, 5497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 2048, 985, 33, 63 }, 5507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky { 0 }, 5517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky}; 5527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic const uint8_t cis_signature[] = { 5557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 0x01, 0x03, 0xD9, 0x01, 0xFF, 0x18, 0x02, 0xDF, 0x01, 0x20 5567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky}; 5577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Find out media parameters. 5587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky * This ideally has to be based on nand id, but for now device size is enough */ 5597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyint sm_get_media_info(struct sm_ftl *ftl, struct mtd_info *mtd) 5607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 5617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int i; 5627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int size_in_megs = mtd->size / (1024 * 1024); 5637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->readonly = mtd->type == MTD_ROM; 5657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Manual settings for very old devices */ 5677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_count = 1; 5687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->smallpagenand = 0; 5697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky switch (size_in_megs) { 5717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky case 1: 5727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* 1 MiB flash/rom SmartMedia card (256 byte pages)*/ 5737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_size = 256; 5747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->max_lba = 250; 5757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->block_size = 8 * SM_SECTOR_SIZE; 5767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->smallpagenand = 1; 5777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky break; 5797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky case 2: 5807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* 2 MiB flash SmartMedia (256 byte pages)*/ 5817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (mtd->writesize == SM_SMALL_PAGE) { 5827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_size = 512; 5837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->max_lba = 500; 5847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->block_size = 8 * SM_SECTOR_SIZE; 5857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->smallpagenand = 1; 5867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* 2 MiB rom SmartMedia */ 5877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } else { 5887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!ftl->readonly) 5907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -ENODEV; 5917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 5927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_size = 256; 5937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->max_lba = 250; 5947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->block_size = 16 * SM_SECTOR_SIZE; 5957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 5967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky break; 5977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky case 4: 5987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* 4 MiB flash/rom SmartMedia device */ 5997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_size = 512; 6007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->max_lba = 500; 6017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->block_size = 16 * SM_SECTOR_SIZE; 6027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky break; 6037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky case 8: 6047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* 8 MiB flash/rom SmartMedia device */ 6057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_size = 1024; 6067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->max_lba = 1000; 6077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->block_size = 16 * SM_SECTOR_SIZE; 6087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 6097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Minimum xD size is 16MiB. Also, all xD cards have standard zone 6117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sizes. SmartMedia cards exist up to 128 MiB and have same layout*/ 6127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (size_in_megs >= 16) { 6137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_count = size_in_megs / 16; 6147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_size = 1024; 6157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->max_lba = 1000; 6167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->block_size = 32 * SM_SECTOR_SIZE; 6177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 6187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Test for proper write,erase and oob sizes */ 6207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (mtd->erasesize > ftl->block_size) 6217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -ENODEV; 6227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (mtd->writesize > SM_SECTOR_SIZE) 6247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -ENODEV; 6257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->smallpagenand && mtd->oobsize < SM_SMALL_OOB_SIZE) 6277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -ENODEV; 6287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!ftl->smallpagenand && mtd->oobsize < SM_OOB_SIZE) 6307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -ENODEV; 6317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* We use these functions for IO */ 6337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!mtd->read_oob || !mtd->write_oob) 6347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -ENODEV; 6357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Find geometry information */ 6377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky for (i = 0 ; i < ARRAY_SIZE(chs_table) ; i++) { 6387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (chs_table[i].size == size_in_megs) { 6397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cylinders = chs_table[i].cyl; 6407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->heads = chs_table[i].head; 6417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->sectors = chs_table[i].sec; 6427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 6437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 6447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 6457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("media has unknown size : %dMiB", size_in_megs); 6477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cylinders = 985; 6487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->heads = 33; 6497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->sectors = 63; 6507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 6517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 6527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Validate the CIS */ 6547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_read_cis(struct sm_ftl *ftl) 6557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 6567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_oob oob; 6577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_read_sector(ftl, 6597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 0, ftl->cis_block, ftl->cis_boffset, ftl->cis_buffer, &oob)) 6607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 6617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!sm_sector_valid(&oob) || !sm_block_valid(&oob)) 6637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 6647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!memcmp(ftl->cis_buffer + ftl->cis_page_offset, 6667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky cis_signature, sizeof(cis_signature))) { 6677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 6687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 6697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 6717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 6727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Scan the media for the CIS */ 6747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_find_cis(struct sm_ftl *ftl) 6757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 6767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_oob oob; 6777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int block, boffset; 6787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int block_found = 0; 6797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int cis_found = 0; 6807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Search for first valid block */ 6827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky for (block = 0 ; block < ftl->zone_size - ftl->max_lba ; block++) { 6837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_read_sector(ftl, 0, block, 0, NULL, &oob)) 6857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 6867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!sm_block_valid(&oob)) 6887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 6897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky block_found = 1; 6907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky break; 6917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 6927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!block_found) 6947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 6957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 6967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Search for first valid sector in this block */ 6977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky for (boffset = 0 ; boffset < ftl->block_size; 6987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky boffset += SM_SECTOR_SIZE) { 6997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_read_sector(ftl, 0, block, boffset, NULL, &oob)) 7017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 7027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!sm_sector_valid(&oob)) 7047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 7057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky break; 7067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 7077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (boffset == ftl->block_size) 7097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 7107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cis_block = block; 7127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cis_boffset = boffset; 7137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cis_page_offset = 0; 7147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky cis_found = !sm_read_cis(ftl); 7167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!cis_found) { 7187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cis_page_offset = SM_SMALL_PAGE; 7197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky cis_found = !sm_read_cis(ftl); 7207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 7217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (cis_found) { 7237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("CIS block found at offset %x", 7247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky block * ftl->block_size + 7257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky boffset + ftl->cis_page_offset); 7267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 7277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 7287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 7297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 7307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Basic test to determine if underlying mtd device if functional */ 7327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_recheck_media(struct sm_ftl *ftl) 7337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 7347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_read_cis(ftl)) { 7357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!ftl->unstable) { 7377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("media unstable, not allowing writes"); 7387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->unstable = 1; 7397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 7407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 7417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 7427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 7437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 7447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Initialize a FTL zone */ 7467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_init_zone(struct sm_ftl *ftl, int zone_num) 7477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 7487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct ftl_zone *zone = &ftl->zones[zone_num]; 7497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_oob oob; 7507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky uint16_t block; 7517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int lba; 7527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int i = 0; 753133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky int len; 7547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("initializing zone %d", zone_num); 7567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Allocate memory for FTL table */ 7587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone->lba_to_phys_table = kmalloc(ftl->max_lba * 2, GFP_KERNEL); 7597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!zone->lba_to_phys_table) 7617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -ENOMEM; 7627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky memset(zone->lba_to_phys_table, -1, ftl->max_lba * 2); 7637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Allocate memory for free sectors FIFO */ 7667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (kfifo_alloc(&zone->free_sectors, ftl->zone_size * 2, GFP_KERNEL)) { 7677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(zone->lba_to_phys_table); 7687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -ENOMEM; 7697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 7707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Now scan the zone */ 7727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky for (block = 0 ; block < ftl->zone_size ; block++) { 7737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Skip blocks till the CIS (including) */ 7757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (zone_num == 0 && block <= ftl->cis_block) 7767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 7777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Read the oob of first sector */ 7797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_read_sector(ftl, zone_num, block, 0, NULL, &oob)) 7807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 7817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Test to see if block is erased. It is enough to test 7837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky first sector, because erase happens in one shot */ 7847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_block_erased(&oob)) { 7857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfifo_in(&zone->free_sectors, 7867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky (unsigned char *)&block, 2); 7877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 7887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 7897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* If block is marked as bad, skip it */ 7917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* This assumes we can trust first sector*/ 7927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* However the way the block valid status is defined, ensures 7937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky very low probability of failure here */ 7947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!sm_block_valid(&oob)) { 7957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("PH %04d <-> <marked bad>", block); 7967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 7977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 7987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 7997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky lba = sm_read_lba(&oob); 8017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Invalid LBA means that block is damaged. */ 8037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* We can try to erase it, or mark it as bad, but 8047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky lets leave that to recovery application */ 8057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (lba == -2 || lba >= ftl->max_lba) { 8067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("PH %04d <-> LBA %04d(bad)", block, lba); 8077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 8087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 8097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* If there is no collision, 8127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky just put the sector in the FTL table */ 8137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (zone->lba_to_phys_table[lba] < 0) { 8147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg_verbose("PH %04d <-> LBA %04d", block, lba); 8157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone->lba_to_phys_table[lba] = block; 8167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 8177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 8187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("collision" 8207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky " of LBA %d between blocks %d and %d in zone %d", 8217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky lba, zone->lba_to_phys_table[lba], block, zone_num); 8227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Test that this block is valid*/ 8247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_check_block(ftl, zone_num, block)) 8257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 8267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Test now the old block */ 8287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_check_block(ftl, zone_num, 8297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone->lba_to_phys_table[lba])) { 8307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone->lba_to_phys_table[lba] = block; 8317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 8327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 8337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* If both blocks are valid and share same LBA, it means that 8357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky they hold different versions of same data. It not 8367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky known which is more recent, thus just erase one of them 8377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky */ 8387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("both blocks are valid, erasing the later"); 8397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_erase_block(ftl, zone_num, block, 1); 8407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 8417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("zone initialized"); 8437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone->initialized = 1; 8447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* No free sectors, means that the zone is heavily damaged, write won't 8467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky work, but it can still can be (partially) read */ 8477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!kfifo_len(&zone->free_sectors)) { 8487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("no free blocks in zone %d", zone_num); 8497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 8507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 8517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Randomize first block we write to */ 8537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky get_random_bytes(&i, 2); 8547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky i %= (kfifo_len(&zone->free_sectors) / 2); 8557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky while (i--) { 857133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky len = kfifo_out(&zone->free_sectors, 858133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky (unsigned char *)&block, 2); 859133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky WARN_ON(len != 2); 8607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfifo_in(&zone->free_sectors, (const unsigned char *)&block, 2); 8617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 8627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 8637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 8647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Get and automaticly initialize an FTL mapping for one zone */ 8667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystruct ftl_zone *sm_get_zone(struct sm_ftl *ftl, int zone_num) 8677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 8687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct ftl_zone *zone; 8697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int error; 8707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky BUG_ON(zone_num >= ftl->zone_count); 8727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone = &ftl->zones[zone_num]; 8737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!zone->initialized) { 8757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky error = sm_init_zone(ftl, zone_num); 8767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (error) 8787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return ERR_PTR(error); 8797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 8807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return zone; 8817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 8827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* ----------------- cache handling ------------------------------------------*/ 8857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Initialize the one block cache */ 8877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyvoid sm_cache_init(struct sm_ftl *ftl) 8887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 8897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_data_invalid_bitmap = 0xFFFFFFFF; 8907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_clean = 1; 8917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_zone = -1; 8927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_block = -1; 8937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /*memset(ftl->cache_data, 0xAA, ftl->block_size);*/ 8947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 8957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 8967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Put sector in one block cache */ 8977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyvoid sm_cache_put(struct sm_ftl *ftl, char *buffer, int boffset) 8987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 8997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky memcpy(ftl->cache_data + boffset, buffer, SM_SECTOR_SIZE); 9007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky clear_bit(boffset / SM_SECTOR_SIZE, &ftl->cache_data_invalid_bitmap); 9017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_clean = 0; 9027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 9037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Read a sector from the cache */ 9057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyint sm_cache_get(struct sm_ftl *ftl, char *buffer, int boffset) 9067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 9077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (test_bit(boffset / SM_SECTOR_SIZE, 9087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky &ftl->cache_data_invalid_bitmap)) 9097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -1; 9107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky memcpy(buffer, ftl->cache_data + boffset, SM_SECTOR_SIZE); 9127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 9137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 9147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* Write the cache to hardware */ 9167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyint sm_cache_flush(struct sm_ftl *ftl) 9177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 9187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct ftl_zone *zone; 9197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int sector_num; 9217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky uint16_t write_sector; 9227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int zone_num = ftl->cache_zone; 9237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int block_num; 9247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->cache_clean) 9267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 9277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->unstable) 9297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 9307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky BUG_ON(zone_num < 0); 9327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone = &ftl->zones[zone_num]; 9337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky block_num = zone->lba_to_phys_table[ftl->cache_block]; 9347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Try to read all unread areas of the cache block*/ 937fed457a83611182f5a2e049cce02f8f4e1b65644Akinobu Mita for_each_set_bit(sector_num, &ftl->cache_data_invalid_bitmap, 9387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->block_size / SM_SECTOR_SIZE) { 9397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!sm_read_sector(ftl, 9417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone_num, block_num, sector_num * SM_SECTOR_SIZE, 9427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_data + sector_num * SM_SECTOR_SIZE, NULL)) 9437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky clear_bit(sector_num, 9447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky &ftl->cache_data_invalid_bitmap); 9457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 9467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyrestart: 9477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->unstable) 9497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 950133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky 951133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky /* If there are no spare blocks, */ 952133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky /* we could still continue by erasing/writing the current block, 9537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky but for such worn out media it doesn't worth the trouble, 9547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky and the dangers */ 955133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky if (kfifo_out(&zone->free_sectors, 956133fa8c7d70d16b07db3a3d87ea18291db8f8ebfMaxim Levitsky (unsigned char *)&write_sector, 2) != 2) { 9577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("no free sectors for write!"); 9587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return -EIO; 9597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 9607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_write_block(ftl, ftl->cache_data, zone_num, write_sector, 9637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_block, ftl->cache_data_invalid_bitmap)) 9647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto restart; 9657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Update the FTL table */ 9677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone->lba_to_phys_table[ftl->cache_block] = write_sector; 9687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Write succesfull, so erase and free the old block */ 9707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (block_num > 0) 9717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_erase_block(ftl, zone_num, block_num, 1); 9727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_cache_init(ftl); 9747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 9757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 9767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* flush timer, runs a second after last write */ 9797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic void sm_cache_flush_timer(unsigned long data) 9807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 9817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl = (struct sm_ftl *)data; 9827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky queue_work(cache_flush_workqueue, &ftl->flush_work); 9837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 9847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* cache flush work, kicked by timer */ 9867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic void sm_cache_flush_work(struct work_struct *work) 9877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 9887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl = container_of(work, struct sm_ftl, flush_work); 9897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_lock(&ftl->mutex); 9907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_cache_flush(ftl); 9917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_unlock(&ftl->mutex); 9927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return; 9937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 9947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* ---------------- outside interface -------------------------------------- */ 9967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 9977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* outside interface: read a sector */ 9987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_read(struct mtd_blktrans_dev *dev, 9997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky unsigned long sect_no, char *buf) 10007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 10017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl = dev->priv; 10027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct ftl_zone *zone; 10037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int error = 0, in_cache = 0; 10047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int zone_num, block, boffset; 10057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_break_offset(ftl, sect_no << 9, &zone_num, &block, &boffset); 10077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_lock(&ftl->mutex); 10087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone = sm_get_zone(ftl, zone_num); 10117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (IS_ERR(zone)) { 10127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky error = PTR_ERR(zone); 10137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto unlock; 10147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 10157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Have to look at cache first */ 10177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->cache_zone == zone_num && ftl->cache_block == block) { 10187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky in_cache = 1; 10197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!sm_cache_get(ftl, buf, boffset)) 10207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto unlock; 10217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 10227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Translate the block and return if doesn't exist in the table */ 10247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky block = zone->lba_to_phys_table[block]; 10257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (block == -1) { 10277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky memset(buf, 0xFF, SM_SECTOR_SIZE); 10287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto unlock; 10297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 10307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_read_sector(ftl, zone_num, block, boffset, buf, NULL)) { 10327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky error = -EIO; 10337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto unlock; 10347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 10357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (in_cache) 10377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_cache_put(ftl, buf, boffset); 10387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyunlock: 10397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_unlock(&ftl->mutex); 10407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return error; 10417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 10427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* outside interface: write a sector */ 10447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_write(struct mtd_blktrans_dev *dev, 10457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky unsigned long sec_no, char *buf) 10467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 10477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl = dev->priv; 10487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct ftl_zone *zone; 10497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int error, zone_num, block, boffset; 10507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky BUG_ON(ftl->readonly); 10527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_break_offset(ftl, sec_no << 9, &zone_num, &block, &boffset); 10537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* No need in flush thread running now */ 10557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky del_timer(&ftl->timer); 10567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_lock(&ftl->mutex); 10577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky zone = sm_get_zone(ftl, zone_num); 10597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (IS_ERR(zone)) { 10607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky error = PTR_ERR(zone); 10617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto unlock; 10627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 10637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* If entry is not in cache, flush it */ 10657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (ftl->cache_block != block || ftl->cache_zone != zone_num) { 10667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky error = sm_cache_flush(ftl); 10687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (error) 10697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto unlock; 10707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_block = block; 10727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_zone = zone_num; 10737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 10747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_cache_put(ftl, buf, boffset); 10767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyunlock: 10777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mod_timer(&ftl->timer, jiffies + msecs_to_jiffies(cache_timeout)); 10787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_unlock(&ftl->mutex); 10797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return error; 10807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 10817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* outside interface: flush everything */ 10837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_flush(struct mtd_blktrans_dev *dev) 10847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 10857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl = dev->priv; 10867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int retval; 10877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_lock(&ftl->mutex); 10897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky retval = sm_cache_flush(ftl); 10907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_unlock(&ftl->mutex); 10917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return retval; 10927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 10937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* outside interface: device is released */ 10957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_release(struct mtd_blktrans_dev *dev) 10967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 10977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl = dev->priv; 10987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 10997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_lock(&ftl->mutex); 11007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky del_timer_sync(&ftl->timer); 11017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky cancel_work_sync(&ftl->flush_work); 11027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_cache_flush(ftl); 11037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_unlock(&ftl->mutex); 11047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 11057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 11067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* outside interface: get geometry */ 11087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic int sm_getgeo(struct mtd_blktrans_dev *dev, struct hd_geometry *geo) 11097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 11107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl = dev->priv; 11117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky geo->heads = ftl->heads; 11127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky geo->sectors = ftl->sectors; 11137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky geo->cylinders = ftl->cylinders; 11147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return 0; 11157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 11167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* external interface: main initialization function */ 11187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic void sm_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd) 11197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 11207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct mtd_blktrans_dev *trans; 11217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl; 11227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Allocate & initialize our private structure */ 11247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl = kzalloc(sizeof(struct sm_ftl), GFP_KERNEL); 11257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!ftl) 11267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error1; 11277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky mutex_init(&ftl->mutex); 11307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky setup_timer(&ftl->timer, sm_cache_flush_timer, (unsigned long)ftl); 11317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky INIT_WORK(&ftl->flush_work, sm_cache_flush_work); 11327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky init_completion(&ftl->erase_completion); 11337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Read media information */ 11357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_get_media_info(ftl, mtd)) { 11367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("found unsupported mtd device, aborting"); 11377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error2; 11387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 11397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Allocate temporary CIS buffer for read retry support */ 11427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cis_buffer = kzalloc(SM_SECTOR_SIZE, GFP_KERNEL); 11437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!ftl->cis_buffer) 11447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error2; 11457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Allocate zone array, it will be initialized on demand */ 11477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zones = kzalloc(sizeof(struct ftl_zone) * ftl->zone_count, 11487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky GFP_KERNEL); 11497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!ftl->zones) 11507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error3; 11517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Allocate the cache*/ 11537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->cache_data = kzalloc(ftl->block_size, GFP_KERNEL); 11547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!ftl->cache_data) 11567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error4; 11577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_cache_init(ftl); 11597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11617d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Allocate upper layer structure and initialize it */ 11627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky trans = kzalloc(sizeof(struct mtd_blktrans_dev), GFP_KERNEL); 11637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!trans) 11647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error5; 11657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->trans = trans; 11677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky trans->priv = ftl; 11687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky trans->tr = tr; 11707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky trans->mtd = mtd; 11717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky trans->devnum = -1; 11727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky trans->size = (ftl->block_size * ftl->max_lba * ftl->zone_count) >> 9; 11737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky trans->readonly = ftl->readonly; 11747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (sm_find_cis(ftl)) { 11767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("CIS not found on mtd device, aborting"); 11777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error6; 11787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 11797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->disk_attributes = sm_create_sysfs_attributes(ftl); 11817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky trans->disk_attributes = ftl->disk_attributes; 11827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_printk("Found %d MiB xD/SmartMedia FTL on mtd%d", 11847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky (int)(mtd->size / (1024 * 1024)), mtd->index); 11857d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11867d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("FTL layout:"); 11877d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("%d zone(s), each consists of %d blocks (+%d spares)", 11887d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_count, ftl->max_lba, 11897d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->zone_size - ftl->max_lba); 11907d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("each block consists of %d bytes", 11917d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->block_size); 11927d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11937d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 11947d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky /* Register device*/ 11957d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (add_mtd_blktrans_dev(trans)) { 11967d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky dbg("error in mtdblktrans layer"); 11977d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky goto error6; 11987d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 11997d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return; 12007d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyerror6: 12017d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(trans); 12027d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyerror5: 12037d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl->cache_data); 12047d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyerror4: 12057d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl->zones); 12067d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyerror3: 12077d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl->cis_buffer); 12087d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyerror2: 12097d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl); 12107d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskyerror1: 12117d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return; 12127d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 12137d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12147d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky/* main interface: device {surprise,} removal */ 12157d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic void sm_remove_dev(struct mtd_blktrans_dev *dev) 12167d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 12177d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky struct sm_ftl *ftl = dev->priv; 12187d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int i; 12197d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12207d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky del_mtd_blktrans_dev(dev); 12217d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky ftl->trans = NULL; 12227d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12237d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky for (i = 0 ; i < ftl->zone_count; i++) { 12247d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12257d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (!ftl->zones[i].initialized) 12267d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky continue; 12277d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12287d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl->zones[i].lba_to_phys_table); 12297d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfifo_free(&ftl->zones[i].free_sectors); 12307d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky } 12317d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12327d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky sm_delete_sysfs_attributes(ftl); 12337d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl->cis_buffer); 12347d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl->zones); 12357d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl->cache_data); 12367d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky kfree(ftl); 12377d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 12387d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12397d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic struct mtd_blktrans_ops sm_ftl_ops = { 12407d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .name = "smblk", 12417d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .major = -1, 12427d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .part_bits = SM_FTL_PARTN_BITS, 12437d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .blksize = SM_SECTOR_SIZE, 12447d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .getgeo = sm_getgeo, 12457d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12467d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .add_mtd = sm_add_mtd, 12477d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .remove_dev = sm_remove_dev, 12487d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12497d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .readsect = sm_read, 12507d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .writesect = sm_write, 12517d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12527d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .flush = sm_flush, 12537d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .release = sm_release, 12547d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12557d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky .owner = THIS_MODULE, 12567d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky}; 12577d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12587d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic __init int sm_module_init(void) 12597d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 12607d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky int error = 0; 126158a69cb47ec6991bf006a3e5d202e8571b0327a4Tejun Heo cache_flush_workqueue = create_freezable_workqueue("smflush"); 12627d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12637d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (IS_ERR(cache_flush_workqueue)) 12647d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return PTR_ERR(cache_flush_workqueue); 12657d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12667d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky error = register_mtd_blktrans(&sm_ftl_ops); 12677d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky if (error) 12687d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky destroy_workqueue(cache_flush_workqueue); 12697d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky return error; 12707d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12717d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 12727d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12737d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskystatic void __exit sm_module_exit(void) 12747d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky{ 12757d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky destroy_workqueue(cache_flush_workqueue); 12767d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky deregister_mtd_blktrans(&sm_ftl_ops); 12777d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky} 12787d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12797d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskymodule_init(sm_module_init); 12807d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitskymodule_exit(sm_module_exit); 12817d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim Levitsky 12827d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim LevitskyMODULE_LICENSE("GPL"); 12837d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim LevitskyMODULE_AUTHOR("Maxim Levitsky <maximlevitsky@gmail.com>"); 12847d17c02a01a111f40986859f044c8c4cce8a4aa6Maxim LevitskyMODULE_DESCRIPTION("Smartmedia/xD mtd translation layer"); 1285