diff options
Diffstat (limited to 'drivers/mtd/nand/raw/nandsim.c')
| -rw-r--r-- | drivers/mtd/nand/raw/nandsim.c | 658 |
1 files changed, 371 insertions, 287 deletions
diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c index 933d1a629c51..84942e7e528f 100644 --- a/drivers/mtd/nand/raw/nandsim.c +++ b/drivers/mtd/nand/raw/nandsim.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * NAND flash simulator. * @@ -7,20 +8,6 @@ * * Note: NS means "NAND Simulator". * Note: Input means input TO flash chip, output means output FROM chip. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2, or (at your option) any later - * version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General - * Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA */ #define pr_fmt(fmt) "[nandsim]" fmt @@ -36,7 +23,6 @@ #include <linux/string.h> #include <linux/mtd/mtd.h> #include <linux/mtd/rawnand.h> -#include <linux/mtd/nand_bch.h> #include <linux/mtd/partitions.h> #include <linux/delay.h> #include <linux/list.h> @@ -215,6 +201,9 @@ MODULE_PARM_DESC(bch, "Enable BCH ecc and set how many bits should " /* Calculate the OOB offset in flash RAM image by (row, column) address */ #define NS_RAW_OFFSET_OOB(ns) (NS_RAW_OFFSET(ns) + ns->geom.pgsz) +/* Calculate the byte shift in the next page to access */ +#define NS_PAGE_BYTE_SHIFT(ns) ((ns)->regs.column + (ns)->regs.off) + /* After a command is input, the simulator goes to one of the following states */ #define STATE_CMD_READ0 0x00000001 /* read data from the beginning of page */ #define STATE_CMD_READ1 0x00000002 /* read data from the second half of page */ @@ -298,6 +287,8 @@ union ns_mem { * The structure which describes all the internal simulator data. */ struct nandsim { + struct nand_chip chip; + struct nand_controller base; struct mtd_partition partitions[CONFIG_NANDSIM_MAX_PARTS]; unsigned int nbparts; @@ -364,6 +355,9 @@ struct nandsim { void *file_buf; struct page *held_pages[NS_MAX_HELD_PAGES]; int held_cnt; + + /* debugfs entry */ + struct dentry *dent; }; /* @@ -443,7 +437,7 @@ static unsigned long total_wear = 0; /* MTD structure for NAND controller */ static struct mtd_info *nsmtd; -static int nandsim_show(struct seq_file *m, void *private) +static int ns_show(struct seq_file *m, void *private) { unsigned long wmin = -1, wmax = 0, avg; unsigned long deciles[10], decile_max[10], tot = 0; @@ -494,19 +488,18 @@ static int nandsim_show(struct seq_file *m, void *private) return 0; } -DEFINE_SHOW_ATTRIBUTE(nandsim); +DEFINE_SHOW_ATTRIBUTE(ns); /** - * nandsim_debugfs_create - initialize debugfs - * @dev: nandsim device description object + * ns_debugfs_create - initialize debugfs + * @ns: nandsim device description object * * This function creates all debugfs files for UBI device @ubi. Returns zero in * case of success and a negative error code in case of failure. */ -static int nandsim_debugfs_create(struct nandsim *dev) +static int ns_debugfs_create(struct nandsim *ns) { struct dentry *root = nsmtd->dbg.dfs_dir; - struct dentry *dent; /* * Just skip debugfs initialization when the debugfs directory is @@ -519,9 +512,9 @@ static int nandsim_debugfs_create(struct nandsim *dev) return 0; } - dent = debugfs_create_file("nandsim_wear_report", S_IRUSR, - root, dev, &nandsim_fops); - if (IS_ERR_OR_NULL(dent)) { + ns->dent = debugfs_create_file("nandsim_wear_report", 0400, root, ns, + &ns_fops); + if (IS_ERR_OR_NULL(ns->dent)) { NS_ERR("cannot create \"nandsim_wear_report\" debugfs entry\n"); return -1; } @@ -529,13 +522,18 @@ static int nandsim_debugfs_create(struct nandsim *dev) return 0; } +static void ns_debugfs_remove(struct nandsim *ns) +{ + debugfs_remove_recursive(ns->dent); +} + /* * Allocate array of page pointers, create slab allocation for an array * and initialize the array by NULL pointers. * * RETURNS: 0 if success, -ENOMEM if memory alloc fails. */ -static int __init alloc_device(struct nandsim *ns) +static int __init ns_alloc_device(struct nandsim *ns) { struct file *cfile; int i, err; @@ -547,32 +545,39 @@ static int __init alloc_device(struct nandsim *ns) if (!(cfile->f_mode & FMODE_CAN_READ)) { NS_ERR("alloc_device: cache file not readable\n"); err = -EINVAL; - goto err_close; + goto err_close_filp; } if (!(cfile->f_mode & FMODE_CAN_WRITE)) { NS_ERR("alloc_device: cache file not writeable\n"); err = -EINVAL; - goto err_close; + goto err_close_filp; } - ns->pages_written = - vzalloc(array_size(sizeof(unsigned long), - BITS_TO_LONGS(ns->geom.pgnum))); + ns->pages_written = vcalloc(BITS_TO_LONGS(ns->geom.pgnum), + sizeof(unsigned long)); if (!ns->pages_written) { NS_ERR("alloc_device: unable to allocate pages written array\n"); err = -ENOMEM; - goto err_close; + goto err_close_filp; } ns->file_buf = kmalloc(ns->geom.pgszoob, GFP_KERNEL); if (!ns->file_buf) { NS_ERR("alloc_device: unable to allocate file buf\n"); err = -ENOMEM; - goto err_free; + goto err_free_pw; } ns->cfile = cfile; + return 0; + +err_free_pw: + vfree(ns->pages_written); +err_close_filp: + filp_close(cfile, NULL); + + return err; } - ns->pages = vmalloc(array_size(sizeof(union ns_mem), ns->geom.pgnum)); + ns->pages = vmalloc_array(ns->geom.pgnum, sizeof(union ns_mem)); if (!ns->pages) { NS_ERR("alloc_device: unable to allocate page array\n"); return -ENOMEM; @@ -584,22 +589,22 @@ static int __init alloc_device(struct nandsim *ns) ns->geom.pgszoob, 0, 0, NULL); if (!ns->nand_pages_slab) { NS_ERR("cache_create: unable to create kmem_cache\n"); - return -ENOMEM; + err = -ENOMEM; + goto err_free_pg; } return 0; -err_free: - vfree(ns->pages_written); -err_close: - filp_close(cfile, NULL); +err_free_pg: + vfree(ns->pages); + return err; } /* * Free any allocated pages, and free the array of page pointers. */ -static void free_device(struct nandsim *ns) +static void ns_free_device(struct nandsim *ns) { int i; @@ -621,7 +626,7 @@ static void free_device(struct nandsim *ns) } } -static char __init *get_partition_name(int i) +static char __init *ns_get_partition_name(int i) { return kasprintf(GFP_KERNEL, "NAND simulator partition %d", i); } @@ -631,7 +636,7 @@ static char __init *get_partition_name(int i) * * RETURNS: 0 if success, -ERRNO if failure. */ -static int __init init_nandsim(struct mtd_info *mtd) +static int __init ns_init(struct mtd_info *mtd) { struct nand_chip *chip = mtd_to_nand(mtd); struct nandsim *ns = nand_get_controller_data(chip); @@ -644,9 +649,6 @@ static int __init init_nandsim(struct mtd_info *mtd) return -EIO; } - /* Force mtd to not do delays */ - chip->legacy.chip_delay = 0; - /* Initialize the NAND flash parameters */ ns->busw = chip->options & NAND_BUSWIDTH_16 ? 16 : 8; ns->geom.totsz = mtd->size; @@ -707,7 +709,7 @@ static int __init init_nandsim(struct mtd_info *mtd) NS_ERR("bad partition size.\n"); return -EINVAL; } - ns->partitions[i].name = get_partition_name(i); + ns->partitions[i].name = ns_get_partition_name(i); if (!ns->partitions[i].name) { NS_ERR("unable to allocate memory.\n"); return -ENOMEM; @@ -721,12 +723,14 @@ static int __init init_nandsim(struct mtd_info *mtd) if (remains) { if (parts_num + 1 > ARRAY_SIZE(ns->partitions)) { NS_ERR("too many partitions.\n"); - return -EINVAL; + ret = -EINVAL; + goto free_partition_names; } - ns->partitions[i].name = get_partition_name(i); + ns->partitions[i].name = ns_get_partition_name(i); if (!ns->partitions[i].name) { NS_ERR("unable to allocate memory.\n"); - return -ENOMEM; + ret = -ENOMEM; + goto free_partition_names; } ns->partitions[i].offset = next_offset; ns->partitions[i].size = remains; @@ -753,33 +757,48 @@ static int __init init_nandsim(struct mtd_info *mtd) printk("sector address bytes: %u\n", ns->geom.secaddrbytes); printk("options: %#x\n", ns->options); - if ((ret = alloc_device(ns)) != 0) - return ret; + ret = ns_alloc_device(ns); + if (ret) + goto free_partition_names; /* Allocate / initialize the internal buffer */ ns->buf.byte = kmalloc(ns->geom.pgszoob, GFP_KERNEL); if (!ns->buf.byte) { NS_ERR("init_nandsim: unable to allocate %u bytes for the internal buffer\n", ns->geom.pgszoob); - return -ENOMEM; + ret = -ENOMEM; + goto free_device; } memset(ns->buf.byte, 0xFF, ns->geom.pgszoob); return 0; + +free_device: + ns_free_device(ns); +free_partition_names: + for (i = 0; i < ARRAY_SIZE(ns->partitions); ++i) + kfree(ns->partitions[i].name); + + return ret; } /* * Free the nandsim structure. */ -static void free_nandsim(struct nandsim *ns) +static void ns_free(struct nandsim *ns) { + int i; + + for (i = 0; i < ARRAY_SIZE(ns->partitions); ++i) + kfree(ns->partitions[i].name); + kfree(ns->buf.byte); - free_device(ns); + ns_free_device(ns); return; } -static int parse_badblocks(struct nandsim *ns, struct mtd_info *mtd) +static int ns_parse_badblocks(struct nandsim *ns, struct mtd_info *mtd) { char *w; int zero_ok; @@ -807,7 +826,7 @@ static int parse_badblocks(struct nandsim *ns, struct mtd_info *mtd) return 0; } -static int parse_weakblocks(void) +static int ns_parse_weakblocks(void) { char *w; int zero_ok; @@ -844,7 +863,7 @@ static int parse_weakblocks(void) return 0; } -static int erase_error(unsigned int erase_block_no) +static int ns_erase_error(unsigned int erase_block_no) { struct weak_block *wb; @@ -858,7 +877,7 @@ static int erase_error(unsigned int erase_block_no) return 0; } -static int parse_weakpages(void) +static int ns_parse_weakpages(void) { char *w; int zero_ok; @@ -895,7 +914,7 @@ static int parse_weakpages(void) return 0; } -static int write_error(unsigned int page_no) +static int ns_write_error(unsigned int page_no) { struct weak_page *wp; @@ -909,7 +928,7 @@ static int write_error(unsigned int page_no) return 0; } -static int parse_gravepages(void) +static int ns_parse_gravepages(void) { char *g; int zero_ok; @@ -946,7 +965,7 @@ static int parse_gravepages(void) return 0; } -static int read_error(unsigned int page_no) +static int ns_read_error(unsigned int page_no) { struct grave_page *gp; @@ -960,35 +979,10 @@ static int read_error(unsigned int page_no) return 0; } -static void free_lists(void) +static int ns_setup_wear_reporting(struct mtd_info *mtd) { - struct list_head *pos, *n; - list_for_each_safe(pos, n, &weak_blocks) { - list_del(pos); - kfree(list_entry(pos, struct weak_block, list)); - } - list_for_each_safe(pos, n, &weak_pages) { - list_del(pos); - kfree(list_entry(pos, struct weak_page, list)); - } - list_for_each_safe(pos, n, &grave_pages) { - list_del(pos); - kfree(list_entry(pos, struct grave_page, list)); - } - kfree(erase_block_wear); -} - -static int setup_wear_reporting(struct mtd_info *mtd) -{ - size_t mem; - wear_eb_count = div_u64(mtd->size, mtd->erasesize); - mem = wear_eb_count * sizeof(unsigned long); - if (mem / sizeof(unsigned long) != wear_eb_count) { - NS_ERR("Too many erase blocks for wear reporting\n"); - return -ENOMEM; - } - erase_block_wear = kzalloc(mem, GFP_KERNEL); + erase_block_wear = kcalloc(wear_eb_count, sizeof(unsigned long), GFP_KERNEL); if (!erase_block_wear) { NS_ERR("Too many erase blocks for wear reporting\n"); return -ENOMEM; @@ -996,7 +990,7 @@ static int setup_wear_reporting(struct mtd_info *mtd) return 0; } -static void update_wear(unsigned int erase_block_no) +static void ns_update_wear(unsigned int erase_block_no) { if (!erase_block_wear) return; @@ -1015,7 +1009,7 @@ static void update_wear(unsigned int erase_block_no) /* * Returns the string representation of 'state' state. */ -static char *get_state_name(uint32_t state) +static char *ns_get_state_name(uint32_t state) { switch (NS_STATE(state)) { case STATE_CMD_READ0: @@ -1075,7 +1069,7 @@ static char *get_state_name(uint32_t state) * * RETURNS: 1 if wrong command, 0 if right. */ -static int check_command(int cmd) +static int ns_check_command(int cmd) { switch (cmd) { @@ -1102,7 +1096,7 @@ static int check_command(int cmd) /* * Returns state after command is accepted by command number. */ -static uint32_t get_state_by_command(unsigned command) +static uint32_t ns_get_state_by_command(unsigned command) { switch (command) { case NAND_CMD_READ0: @@ -1140,7 +1134,7 @@ static uint32_t get_state_by_command(unsigned command) /* * Move an address byte to the correspondent internal register. */ -static inline void accept_addr_byte(struct nandsim *ns, u_char bt) +static inline void ns_accept_addr_byte(struct nandsim *ns, u_char bt) { uint byte = (uint)bt; @@ -1158,9 +1152,10 @@ static inline void accept_addr_byte(struct nandsim *ns, u_char bt) /* * Switch to STATE_READY state. */ -static inline void switch_to_ready_state(struct nandsim *ns, u_char status) +static inline void ns_switch_to_ready_state(struct nandsim *ns, u_char status) { - NS_DBG("switch_to_ready_state: switch to %s state\n", get_state_name(STATE_READY)); + NS_DBG("switch_to_ready_state: switch to %s state\n", + ns_get_state_name(STATE_READY)); ns->state = STATE_READY; ns->nxstate = STATE_UNKNOWN; @@ -1217,7 +1212,7 @@ static inline void switch_to_ready_state(struct nandsim *ns, u_char status) * -1 - several matches. * 0 - operation is found. */ -static int find_operation(struct nandsim *ns, uint32_t flag) +static int ns_find_operation(struct nandsim *ns, uint32_t flag) { int opsfound = 0; int i, j, idx = 0; @@ -1270,7 +1265,8 @@ static int find_operation(struct nandsim *ns, uint32_t flag) ns->state = ns->op[ns->stateidx]; ns->nxstate = ns->op[ns->stateidx + 1]; NS_DBG("find_operation: operation found, index: %d, state: %s, nxstate %s\n", - idx, get_state_name(ns->state), get_state_name(ns->nxstate)); + idx, ns_get_state_name(ns->state), + ns_get_state_name(ns->nxstate)); return 0; } @@ -1278,13 +1274,13 @@ static int find_operation(struct nandsim *ns, uint32_t flag) /* Nothing was found. Try to ignore previous commands (if any) and search again */ if (ns->npstates != 0) { NS_DBG("find_operation: no operation found, try again with state %s\n", - get_state_name(ns->state)); + ns_get_state_name(ns->state)); ns->npstates = 0; - return find_operation(ns, 0); + return ns_find_operation(ns, 0); } NS_DBG("find_operation: no operations found\n"); - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + ns_switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return -2; } @@ -1301,7 +1297,7 @@ static int find_operation(struct nandsim *ns, uint32_t flag) return -1; } -static void put_pages(struct nandsim *ns) +static void ns_put_pages(struct nandsim *ns) { int i; @@ -1310,7 +1306,8 @@ static void put_pages(struct nandsim *ns) } /* Get page cache pages in advance to provide NOFS memory allocation */ -static int get_pages(struct nandsim *ns, struct file *file, size_t count, loff_t pos) +static int ns_get_pages(struct nandsim *ns, struct file *file, size_t count, + loff_t pos) { pgoff_t index, start_index, end_index; struct page *page; @@ -1330,7 +1327,7 @@ static int get_pages(struct nandsim *ns, struct file *file, size_t count, loff_t page = find_or_create_page(mapping, index, GFP_NOFS); } if (page == NULL) { - put_pages(ns); + ns_put_pages(ns); return -ENOMEM; } unlock_page(page); @@ -1340,35 +1337,37 @@ static int get_pages(struct nandsim *ns, struct file *file, size_t count, loff_t return 0; } -static ssize_t read_file(struct nandsim *ns, struct file *file, void *buf, size_t count, loff_t pos) +static ssize_t ns_read_file(struct nandsim *ns, struct file *file, void *buf, + size_t count, loff_t pos) { ssize_t tx; int err; unsigned int noreclaim_flag; - err = get_pages(ns, file, count, pos); + err = ns_get_pages(ns, file, count, pos); if (err) return err; noreclaim_flag = memalloc_noreclaim_save(); tx = kernel_read(file, buf, count, &pos); memalloc_noreclaim_restore(noreclaim_flag); - put_pages(ns); + ns_put_pages(ns); return tx; } -static ssize_t write_file(struct nandsim *ns, struct file *file, void *buf, size_t count, loff_t pos) +static ssize_t ns_write_file(struct nandsim *ns, struct file *file, void *buf, + size_t count, loff_t pos) { ssize_t tx; int err; unsigned int noreclaim_flag; - err = get_pages(ns, file, count, pos); + err = ns_get_pages(ns, file, count, pos); if (err) return err; noreclaim_flag = memalloc_noreclaim_save(); tx = kernel_write(file, buf, count, &pos); memalloc_noreclaim_restore(noreclaim_flag); - put_pages(ns); + ns_put_pages(ns); return tx; } @@ -1381,37 +1380,37 @@ static inline union ns_mem *NS_GET_PAGE(struct nandsim *ns) } /* - * Retuns a pointer to the current byte, within the current page. + * Returns a pointer to the current byte, within the current page. */ static inline u_char *NS_PAGE_BYTE_OFF(struct nandsim *ns) { - return NS_GET_PAGE(ns)->byte + ns->regs.column + ns->regs.off; + return NS_GET_PAGE(ns)->byte + NS_PAGE_BYTE_SHIFT(ns); } -static int do_read_error(struct nandsim *ns, int num) +static int ns_do_read_error(struct nandsim *ns, int num) { unsigned int page_no = ns->regs.row; - if (read_error(page_no)) { - prandom_bytes(ns->buf.byte, num); + if (ns_read_error(page_no)) { + get_random_bytes(ns->buf.byte, num); NS_WARN("simulating read error in page %u\n", page_no); return 1; } return 0; } -static void do_bit_flips(struct nandsim *ns, int num) +static void ns_do_bit_flips(struct nandsim *ns, int num) { - if (bitflips && prandom_u32() < (1 << 22)) { + if (bitflips && get_random_u16() < (1 << 6)) { int flips = 1; if (bitflips > 1) - flips = (prandom_u32() % (int) bitflips) + 1; + flips = get_random_u32_inclusive(1, bitflips); while (flips--) { - int pos = prandom_u32() % (num * 8); + int pos = get_random_u32_below(num * 8); ns->buf.byte[pos / 8] ^= (1 << (pos % 8)); NS_WARN("read_page: flipping bit %d in page %d " "reading from %d ecc: corrected=%u failed=%u\n", - pos, ns->regs.row, ns->regs.column + ns->regs.off, + pos, ns->regs.row, NS_PAGE_BYTE_SHIFT(ns), nsmtd->ecc_stats.corrected, nsmtd->ecc_stats.failed); } } @@ -1420,7 +1419,7 @@ static void do_bit_flips(struct nandsim *ns, int num) /* * Fill the NAND buffer with data read from the specified page. */ -static void read_page(struct nandsim *ns, int num) +static void ns_read_page(struct nandsim *ns, int num) { union ns_mem *mypage; @@ -1433,16 +1432,17 @@ static void read_page(struct nandsim *ns, int num) ssize_t tx; NS_DBG("read_page: page %d written, reading from %d\n", - ns->regs.row, ns->regs.column + ns->regs.off); - if (do_read_error(ns, num)) + ns->regs.row, NS_PAGE_BYTE_SHIFT(ns)); + if (ns_do_read_error(ns, num)) return; pos = (loff_t)NS_RAW_OFFSET(ns) + ns->regs.off; - tx = read_file(ns, ns->cfile, ns->buf.byte, num, pos); + tx = ns_read_file(ns, ns->cfile, ns->buf.byte, num, + pos); if (tx != num) { NS_ERR("read_page: read error for page %d ret %ld\n", ns->regs.row, (long)tx); return; } - do_bit_flips(ns, num); + ns_do_bit_flips(ns, num); } return; } @@ -1453,18 +1453,18 @@ static void read_page(struct nandsim *ns, int num) memset(ns->buf.byte, 0xFF, num); } else { NS_DBG("read_page: page %d allocated, reading from %d\n", - ns->regs.row, ns->regs.column + ns->regs.off); - if (do_read_error(ns, num)) + ns->regs.row, NS_PAGE_BYTE_SHIFT(ns)); + if (ns_do_read_error(ns, num)) return; memcpy(ns->buf.byte, NS_PAGE_BYTE_OFF(ns), num); - do_bit_flips(ns, num); + ns_do_bit_flips(ns, num); } } /* * Erase all pages in the specified sector. */ -static void erase_sector(struct nandsim *ns) +static void ns_erase_sector(struct nandsim *ns) { union ns_mem *mypage; int i; @@ -1492,7 +1492,7 @@ static void erase_sector(struct nandsim *ns) /* * Program the specified page with the contents from the NAND buffer. */ -static int prog_page(struct nandsim *ns, int num) +static int ns_prog_page(struct nandsim *ns, int num) { int i; union ns_mem *mypage; @@ -1504,14 +1504,14 @@ static int prog_page(struct nandsim *ns, int num) int all; NS_DBG("prog_page: writing page %d\n", ns->regs.row); - pg_off = ns->file_buf + ns->regs.column + ns->regs.off; + pg_off = ns->file_buf + NS_PAGE_BYTE_SHIFT(ns); off = (loff_t)NS_RAW_OFFSET(ns) + ns->regs.off; if (!test_bit(ns->regs.row, ns->pages_written)) { all = 1; memset(ns->file_buf, 0xff, ns->geom.pgszoob); } else { all = 0; - tx = read_file(ns, ns->cfile, pg_off, num, off); + tx = ns_read_file(ns, ns->cfile, pg_off, num, off); if (tx != num) { NS_ERR("prog_page: read error for page %d ret %ld\n", ns->regs.row, (long)tx); return -1; @@ -1521,14 +1521,15 @@ static int prog_page(struct nandsim *ns, int num) pg_off[i] &= ns->buf.byte[i]; if (all) { loff_t pos = (loff_t)ns->regs.row * ns->geom.pgszoob; - tx = write_file(ns, ns->cfile, ns->file_buf, ns->geom.pgszoob, pos); + tx = ns_write_file(ns, ns->cfile, ns->file_buf, + ns->geom.pgszoob, pos); if (tx != ns->geom.pgszoob) { NS_ERR("prog_page: write error for page %d ret %ld\n", ns->regs.row, (long)tx); return -1; } __set_bit(ns->regs.row, ns->pages_written); } else { - tx = write_file(ns, ns->cfile, pg_off, num, off); + tx = ns_write_file(ns, ns->cfile, pg_off, num, off); if (tx != num) { NS_ERR("prog_page: write error for page %d ret %ld\n", ns->regs.row, (long)tx); return -1; @@ -1566,7 +1567,7 @@ static int prog_page(struct nandsim *ns, int num) * * RETURNS: 0 if success, -1 if error. */ -static int do_state_action(struct nandsim *ns, uint32_t action) +static int ns_do_state_action(struct nandsim *ns, uint32_t action) { int num; int busdiv = ns->busw == 8 ? 1 : 2; @@ -1592,8 +1593,8 @@ static int do_state_action(struct nandsim *ns, uint32_t action) NS_ERR("do_state_action: column number is too large\n"); break; } - num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; - read_page(ns, num); + num = ns->geom.pgszoob - NS_PAGE_BYTE_SHIFT(ns); + ns_read_page(ns, num); NS_DBG("do_state_action: (ACTION_CPY:) copy %d bytes to int buf, raw offset %d\n", num, NS_RAW_OFFSET(ns) + ns->regs.off); @@ -1636,14 +1637,14 @@ static int do_state_action(struct nandsim *ns, uint32_t action) ns->regs.row, NS_RAW_OFFSET(ns)); NS_LOG("erase sector %u\n", erase_block_no); - erase_sector(ns); + ns_erase_sector(ns); NS_MDELAY(erase_delay); if (erase_block_wear) - update_wear(erase_block_no); + ns_update_wear(erase_block_no); - if (erase_error(erase_block_no)) { + if (ns_erase_error(erase_block_no)) { NS_WARN("simulating erase failure in erase block %u\n", erase_block_no); return -1; } @@ -1660,14 +1661,14 @@ static int do_state_action(struct nandsim *ns, uint32_t action) return -1; } - num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; + num = ns->geom.pgszoob - NS_PAGE_BYTE_SHIFT(ns); if (num != ns->regs.count) { NS_ERR("do_state_action: too few bytes were input (%d instead of %d)\n", ns->regs.count, num); return -1; } - if (prog_page(ns, num) == -1) + if (ns_prog_page(ns, num) == -1) return -1; page_no = ns->regs.row; @@ -1679,7 +1680,7 @@ static int do_state_action(struct nandsim *ns, uint32_t action) NS_UDELAY(programm_delay); NS_UDELAY(output_cycle * ns->geom.pgsz / 1000 / busdiv); - if (write_error(page_no)) { + if (ns_write_error(page_no)) { NS_WARN("simulating write failure in page %u\n", page_no); return -1; } @@ -1716,7 +1717,7 @@ static int do_state_action(struct nandsim *ns, uint32_t action) /* * Switch simulator's state. */ -static void switch_state(struct nandsim *ns) +static void ns_switch_state(struct nandsim *ns) { if (ns->op) { /* @@ -1730,14 +1731,8 @@ static void switch_state(struct nandsim *ns) NS_DBG("switch_state: operation is known, switch to the next state, " "state: %s, nxstate: %s\n", - get_state_name(ns->state), get_state_name(ns->nxstate)); - - /* See, whether we need to do some action */ - if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); - return; - } - + ns_get_state_name(ns->state), + ns_get_state_name(ns->nxstate)); } else { /* * We don't yet know which operation we perform. @@ -1748,17 +1743,19 @@ static void switch_state(struct nandsim *ns) * The only event causing the switch_state function to * be called with yet unknown operation is new command. */ - ns->state = get_state_by_command(ns->regs.command); + ns->state = ns_get_state_by_command(ns->regs.command); NS_DBG("switch_state: operation is unknown, try to find it\n"); - if (find_operation(ns, 0) != 0) + if (ns_find_operation(ns, 0)) return; + } - if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); - return; - } + /* See, whether we need to do some action */ + if ((ns->state & ACTION_MASK) && + ns_do_state_action(ns, ns->state) < 0) { + ns_switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + return; } /* For 16x devices column means the page offset in words */ @@ -1784,7 +1781,7 @@ static void switch_state(struct nandsim *ns) NS_DBG("switch_state: operation complete, switch to STATE_READY state\n"); - switch_to_ready_state(ns, status); + ns_switch_to_ready_state(ns, status); return; } else if (ns->nxstate & (STATE_DATAIN_MASK | STATE_DATAOUT_MASK)) { @@ -1798,7 +1795,8 @@ static void switch_state(struct nandsim *ns) NS_DBG("switch_state: the next state is data I/O, switch, " "state: %s, nxstate: %s\n", - get_state_name(ns->state), get_state_name(ns->nxstate)); + ns_get_state_name(ns->state), + ns_get_state_name(ns->nxstate)); /* * Set the internal register to the count of bytes which @@ -1807,7 +1805,7 @@ static void switch_state(struct nandsim *ns) switch (NS_STATE(ns->state)) { case STATE_DATAIN: case STATE_DATAOUT: - ns->regs.num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; + ns->regs.num = ns->geom.pgszoob - NS_PAGE_BYTE_SHIFT(ns); break; case STATE_DATAOUT_ID: @@ -1876,8 +1874,8 @@ static u_char ns_nand_read_byte(struct nand_chip *chip) return outb; } if (!(ns->state & STATE_DATAOUT_MASK)) { - NS_WARN("read_byte: unexpected data output cycle, state is %s " - "return %#x\n", get_state_name(ns->state), (uint)outb); + NS_WARN("read_byte: unexpected data output cycle, state is %s return %#x\n", + ns_get_state_name(ns->state), (uint)outb); return outb; } @@ -1916,7 +1914,7 @@ static u_char ns_nand_read_byte(struct nand_chip *chip) NS_DBG("read_byte: all bytes were read\n"); if (NS_STATE(ns->nxstate) == STATE_READY) - switch_state(ns); + ns_switch_state(ns); } return outb; @@ -1943,12 +1941,12 @@ static void ns_nand_write_byte(struct nand_chip *chip, u_char byte) if (byte == NAND_CMD_RESET) { NS_LOG("reset chip\n"); - switch_to_ready_state(ns, NS_STATUS_OK(ns)); + ns_switch_to_ready_state(ns, NS_STATUS_OK(ns)); return; } /* Check that the command byte is correct */ - if (check_command(byte)) { + if (ns_check_command(byte)) { NS_ERR("write_byte: unknown command %#x\n", (uint)byte); return; } @@ -1957,7 +1955,7 @@ static void ns_nand_write_byte(struct nand_chip *chip, u_char byte) || NS_STATE(ns->state) == STATE_DATAOUT) { int row = ns->regs.row; - switch_state(ns); + ns_switch_state(ns); if (byte == NAND_CMD_RNDOUT) ns->regs.row = row; } @@ -1972,16 +1970,17 @@ static void ns_nand_write_byte(struct nand_chip *chip, u_char byte) * was expected but command was input. In this case ignore * previous command(s)/state(s) and accept the last one. */ - NS_WARN("write_byte: command (%#x) wasn't expected, expected state is %s, " - "ignore previous states\n", (uint)byte, get_state_name(ns->nxstate)); + NS_WARN("write_byte: command (%#x) wasn't expected, expected state is %s, ignore previous states\n", + (uint)byte, + ns_get_state_name(ns->nxstate)); } - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + ns_switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); } NS_DBG("command byte corresponding to %s state accepted\n", - get_state_name(get_state_by_command(byte))); + ns_get_state_name(ns_get_state_by_command(byte))); ns->regs.command = byte; - switch_state(ns); + ns_switch_state(ns); } else if (ns->lines.ale == 1) { /* @@ -1992,11 +1991,13 @@ static void ns_nand_write_byte(struct nand_chip *chip, u_char byte) NS_DBG("write_byte: operation isn't known yet, identify it\n"); - if (find_operation(ns, 1) < 0) + if (ns_find_operation(ns, 1) < 0) return; - if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + if ((ns->state & ACTION_MASK) && + ns_do_state_action(ns, ns->state) < 0) { + ns_switch_to_ready_state(ns, + NS_STATUS_FAILED(ns)); return; } @@ -2018,20 +2019,20 @@ static void ns_nand_write_byte(struct nand_chip *chip, u_char byte) /* Check that chip is expecting address */ if (!(ns->nxstate & STATE_ADDR_MASK)) { - NS_ERR("write_byte: address (%#x) isn't expected, expected state is %s, " - "switch to STATE_READY\n", (uint)byte, get_state_name(ns->nxstate)); - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + NS_ERR("write_byte: address (%#x) isn't expected, expected state is %s, switch to STATE_READY\n", + (uint)byte, ns_get_state_name(ns->nxstate)); + ns_switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return; } /* Check if this is expected byte */ if (ns->regs.count == ns->regs.num) { NS_ERR("write_byte: no more address bytes expected\n"); - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + ns_switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return; } - accept_addr_byte(ns, byte); + ns_accept_addr_byte(ns, byte); ns->regs.count += 1; @@ -2040,7 +2041,7 @@ static void ns_nand_write_byte(struct nand_chip *chip, u_char byte) if (ns->regs.count == ns->regs.num) { NS_DBG("address (%#x, %#x) is accepted\n", ns->regs.row, ns->regs.column); - switch_state(ns); + ns_switch_state(ns); } } else { @@ -2050,10 +2051,10 @@ static void ns_nand_write_byte(struct nand_chip *chip, u_char byte) /* Check that chip is expecting data input */ if (!(ns->state & STATE_DATAIN_MASK)) { - NS_ERR("write_byte: data input (%#x) isn't expected, state is %s, " - "switch to %s\n", (uint)byte, - get_state_name(ns->state), get_state_name(STATE_READY)); - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + NS_ERR("write_byte: data input (%#x) isn't expected, state is %s, switch to %s\n", + (uint)byte, ns_get_state_name(ns->state), + ns_get_state_name(STATE_READY)); + ns_switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return; } @@ -2076,24 +2077,6 @@ static void ns_nand_write_byte(struct nand_chip *chip, u_char byte) return; } -static void ns_hwcontrol(struct nand_chip *chip, int cmd, unsigned int bitmask) -{ - struct nandsim *ns = nand_get_controller_data(chip); - - ns->lines.cle = bitmask & NAND_CLE ? 1 : 0; - ns->lines.ale = bitmask & NAND_ALE ? 1 : 0; - ns->lines.ce = bitmask & NAND_NCE ? 1 : 0; - - if (cmd != NAND_CMD_NONE) - ns_nand_write_byte(chip, cmd); -} - -static int ns_device_ready(struct nand_chip *chip) -{ - NS_DBG("device_ready\n"); - return 1; -} - static void ns_nand_write_buf(struct nand_chip *chip, const u_char *buf, int len) { @@ -2101,16 +2084,16 @@ static void ns_nand_write_buf(struct nand_chip *chip, const u_char *buf, /* Check that chip is expecting data input */ if (!(ns->state & STATE_DATAIN_MASK)) { - NS_ERR("write_buf: data input isn't expected, state is %s, " - "switch to STATE_READY\n", get_state_name(ns->state)); - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + NS_ERR("write_buf: data input isn't expected, state is %s, switch to STATE_READY\n", + ns_get_state_name(ns->state)); + ns_switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return; } /* Check if these are expected bytes */ if (ns->regs.count + len > ns->regs.num) { NS_ERR("write_buf: too many input bytes\n"); - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + ns_switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return; } @@ -2137,7 +2120,7 @@ static void ns_nand_read_buf(struct nand_chip *chip, u_char *buf, int len) } if (!(ns->state & STATE_DATAOUT_MASK)) { NS_WARN("read_buf: unexpected data output cycle, current state is %s\n", - get_state_name(ns->state)); + ns_get_state_name(ns->state)); return; } @@ -2145,7 +2128,7 @@ static void ns_nand_read_buf(struct nand_chip *chip, u_char *buf, int len) int i; for (i = 0; i < len; i++) - buf[i] = chip->legacy.read_byte(chip); + buf[i] = ns_nand_read_byte(chip); return; } @@ -2153,7 +2136,7 @@ static void ns_nand_read_buf(struct nand_chip *chip, u_char *buf, int len) /* Check if these are expected bytes */ if (ns->regs.count + len > ns->regs.num) { NS_ERR("read_buf: too many bytes to read\n"); - switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); + ns_switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return; } @@ -2162,20 +2145,81 @@ static void ns_nand_read_buf(struct nand_chip *chip, u_char *buf, int len) if (ns->regs.count == ns->regs.num) { if (NS_STATE(ns->nxstate) == STATE_READY) - switch_state(ns); + ns_switch_state(ns); } return; } +static int ns_exec_op(struct nand_chip *chip, const struct nand_operation *op, + bool check_only) +{ + int i; + unsigned int op_id; + const struct nand_op_instr *instr = NULL; + struct nandsim *ns = nand_get_controller_data(chip); + + if (check_only) { + /* The current implementation of nandsim needs to know the + * ongoing operation when performing the address cycles. This + * means it cannot make the difference between a regular read + * and a continuous read. Hence, this hack to manually refuse + * supporting sequential cached operations. + */ + for (op_id = 0; op_id < op->ninstrs; op_id++) { + instr = &op->instrs[op_id]; + if (instr->type == NAND_OP_CMD_INSTR && + (instr->ctx.cmd.opcode == NAND_CMD_READCACHEEND || + instr->ctx.cmd.opcode == NAND_CMD_READCACHESEQ)) + return -EOPNOTSUPP; + } + + return 0; + } + + ns->lines.ce = 1; + + for (op_id = 0; op_id < op->ninstrs; op_id++) { + instr = &op->instrs[op_id]; + ns->lines.cle = 0; + ns->lines.ale = 0; + + switch (instr->type) { + case NAND_OP_CMD_INSTR: + ns->lines.cle = 1; + ns_nand_write_byte(chip, instr->ctx.cmd.opcode); + break; + case NAND_OP_ADDR_INSTR: + ns->lines.ale = 1; + for (i = 0; i < instr->ctx.addr.naddrs; i++) + ns_nand_write_byte(chip, instr->ctx.addr.addrs[i]); + break; + case NAND_OP_DATA_IN_INSTR: + ns_nand_read_buf(chip, instr->ctx.data.buf.in, instr->ctx.data.len); + break; + case NAND_OP_DATA_OUT_INSTR: + ns_nand_write_buf(chip, instr->ctx.data.buf.out, instr->ctx.data.len); + break; + case NAND_OP_WAITRDY_INSTR: + /* we are always ready */ + break; + } + } + + return 0; +} + static int ns_attach_chip(struct nand_chip *chip) { unsigned int eccsteps, eccbytes; + chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT; + chip->ecc.algo = bch ? NAND_ECC_ALGO_BCH : NAND_ECC_ALGO_HAMMING; + if (!bch) return 0; - if (!mtd_nand_has_bch()) { + if (!IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_BCH)) { NS_ERR("BCH ECC support is disabled\n"); return -EINVAL; } @@ -2195,8 +2239,6 @@ static int ns_attach_chip(struct nand_chip *chip) return -EINVAL; } - chip->ecc.mode = NAND_ECC_SOFT; - chip->ecc.algo = NAND_ECC_BCH; chip->ecc.size = 512; chip->ecc.strength = bch; chip->ecc.bytes = eccbytes; @@ -2208,6 +2250,7 @@ static int ns_attach_chip(struct nand_chip *chip) static const struct nand_controller_ops ns_controller_ops = { .attach_chip = ns_attach_chip, + .exec_op = ns_exec_op, }; /* @@ -2215,138 +2258,163 @@ static const struct nand_controller_ops ns_controller_ops = { */ static int __init ns_init_module(void) { + struct list_head *pos, *n; struct nand_chip *chip; - struct nandsim *nand; - int retval = -ENOMEM, i; + struct nandsim *ns; + int ret; if (bus_width != 8 && bus_width != 16) { NS_ERR("wrong bus width (%d), use only 8 or 16\n", bus_width); return -EINVAL; } - /* Allocate and initialize mtd_info, nand_chip and nandsim structures */ - chip = kzalloc(sizeof(struct nand_chip) + sizeof(struct nandsim), - GFP_KERNEL); - if (!chip) { + ns = kzalloc(sizeof(struct nandsim), GFP_KERNEL); + if (!ns) { NS_ERR("unable to allocate core structures.\n"); return -ENOMEM; } + chip = &ns->chip; nsmtd = nand_to_mtd(chip); - nand = (struct nandsim *)(chip + 1); - nand_set_controller_data(chip, (void *)nand); + nand_set_controller_data(chip, (void *)ns); - /* - * Register simulator's callbacks. - */ - chip->legacy.cmd_ctrl = ns_hwcontrol; - chip->legacy.read_byte = ns_nand_read_byte; - chip->legacy.dev_ready = ns_device_ready; - chip->legacy.write_buf = ns_nand_write_buf; - chip->legacy.read_buf = ns_nand_read_buf; - chip->ecc.mode = NAND_ECC_SOFT; - chip->ecc.algo = NAND_ECC_HAMMING; /* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */ /* and 'badblocks' parameters to work */ chip->options |= NAND_SKIP_BBTSCAN; switch (bbt) { case 2: - chip->bbt_options |= NAND_BBT_NO_OOB; + chip->bbt_options |= NAND_BBT_NO_OOB; + fallthrough; case 1: - chip->bbt_options |= NAND_BBT_USE_FLASH; + chip->bbt_options |= NAND_BBT_USE_FLASH; + fallthrough; case 0: break; default: NS_ERR("bbt has to be 0..2\n"); - retval = -EINVAL; - goto error; + ret = -EINVAL; + goto free_ns_struct; } /* * Perform minimum nandsim structure initialization to handle * the initial ID read command correctly */ if (id_bytes[6] != 0xFF || id_bytes[7] != 0xFF) - nand->geom.idbytes = 8; + ns->geom.idbytes = 8; else if (id_bytes[4] != 0xFF || id_bytes[5] != 0xFF) - nand->geom.idbytes = 6; + ns->geom.idbytes = 6; else if (id_bytes[2] != 0xFF || id_bytes[3] != 0xFF) - nand->geom.idbytes = 4; + ns->geom.idbytes = 4; else - nand->geom.idbytes = 2; - nand->regs.status = NS_STATUS_OK(nand); - nand->nxstate = STATE_UNKNOWN; - nand->options |= OPT_PAGE512; /* temporary value */ - memcpy(nand->ids, id_bytes, sizeof(nand->ids)); + ns->geom.idbytes = 2; + ns->regs.status = NS_STATUS_OK(ns); + ns->nxstate = STATE_UNKNOWN; + ns->options |= OPT_PAGE512; /* temporary value */ + memcpy(ns->ids, id_bytes, sizeof(ns->ids)); if (bus_width == 16) { - nand->busw = 16; + ns->busw = 16; chip->options |= NAND_BUSWIDTH_16; } nsmtd->owner = THIS_MODULE; - if ((retval = parse_weakblocks()) != 0) - goto error; + ret = ns_parse_weakblocks(); + if (ret) + goto free_ns_struct; + + ret = ns_parse_weakpages(); + if (ret) + goto free_wb_list; - if ((retval = parse_weakpages()) != 0) - goto error; + ret = ns_parse_gravepages(); + if (ret) + goto free_wp_list; - if ((retval = parse_gravepages()) != 0) - goto error; + nand_controller_init(&ns->base); + ns->base.ops = &ns_controller_ops; + chip->controller = &ns->base; - chip->legacy.dummy_controller.ops = &ns_controller_ops; - retval = nand_scan(chip, 1); - if (retval) { + ret = nand_scan(chip, 1); + if (ret) { NS_ERR("Could not scan NAND Simulator device\n"); - goto error; + goto free_gp_list; } if (overridesize) { uint64_t new_size = (uint64_t)nsmtd->erasesize << overridesize; + struct nand_memory_organization *memorg; + u64 targetsize; + + memorg = nanddev_get_memorg(&chip->base); + if (new_size >> overridesize != nsmtd->erasesize) { NS_ERR("overridesize is too big\n"); - retval = -EINVAL; - goto err_exit; + ret = -EINVAL; + goto cleanup_nand; } + /* N.B. This relies on nand_scan not doing anything with the size before we change it */ nsmtd->size = new_size; - chip->chipsize = new_size; + memorg->eraseblocks_per_lun = 1 << overridesize; + targetsize = nanddev_target_size(&chip->base); chip->chip_shift = ffs(nsmtd->erasesize) + overridesize - 1; - chip->pagemask = (chip->chipsize >> chip->page_shift) - 1; + chip->pagemask = (targetsize >> chip->page_shift) - 1; } - if ((retval = setup_wear_reporting(nsmtd)) != 0) - goto err_exit; + ret = ns_setup_wear_reporting(nsmtd); + if (ret) + goto cleanup_nand; - if ((retval = init_nandsim(nsmtd)) != 0) - goto err_exit; + ret = ns_init(nsmtd); + if (ret) + goto free_ebw; - if ((retval = nand_create_bbt(chip)) != 0) - goto err_exit; + ret = nand_create_bbt(chip); + if (ret) + goto free_ns_object; - if ((retval = parse_badblocks(nand, nsmtd)) != 0) - goto err_exit; + ret = ns_parse_badblocks(ns, nsmtd); + if (ret) + goto free_ns_object; /* Register NAND partitions */ - retval = mtd_device_register(nsmtd, &nand->partitions[0], - nand->nbparts); - if (retval != 0) - goto err_exit; + ret = mtd_device_register(nsmtd, &ns->partitions[0], ns->nbparts); + if (ret) + goto free_ns_object; - if ((retval = nandsim_debugfs_create(nand)) != 0) - goto err_exit; + ret = ns_debugfs_create(ns); + if (ret) + goto unregister_mtd; return 0; -err_exit: - free_nandsim(nand); - nand_release(chip); - for (i = 0;i < ARRAY_SIZE(nand->partitions); ++i) - kfree(nand->partitions[i].name); -error: - kfree(chip); - free_lists(); +unregister_mtd: + WARN_ON(mtd_device_unregister(nsmtd)); +free_ns_object: + ns_free(ns); +free_ebw: + kfree(erase_block_wear); +cleanup_nand: + nand_cleanup(chip); +free_gp_list: + list_for_each_safe(pos, n, &grave_pages) { + list_del(pos); + kfree(list_entry(pos, struct grave_page, list)); + } +free_wp_list: + list_for_each_safe(pos, n, &weak_pages) { + list_del(pos); + kfree(list_entry(pos, struct weak_page, list)); + } +free_wb_list: + list_for_each_safe(pos, n, &weak_blocks) { + list_del(pos); + kfree(list_entry(pos, struct weak_block, list)); + } +free_ns_struct: + kfree(ns); - return retval; + return ret; } module_init(ns_init_module); @@ -2358,14 +2426,30 @@ static void __exit ns_cleanup_module(void) { struct nand_chip *chip = mtd_to_nand(nsmtd); struct nandsim *ns = nand_get_controller_data(chip); - int i; + struct list_head *pos, *n; - free_nandsim(ns); /* Free nandsim private resources */ - nand_release(chip); /* Unregister driver */ - for (i = 0;i < ARRAY_SIZE(ns->partitions); ++i) - kfree(ns->partitions[i].name); - kfree(mtd_to_nand(nsmtd)); /* Free other structures */ - free_lists(); + ns_debugfs_remove(ns); + WARN_ON(mtd_device_unregister(nsmtd)); + ns_free(ns); + kfree(erase_block_wear); + nand_cleanup(chip); + + list_for_each_safe(pos, n, &grave_pages) { + list_del(pos); + kfree(list_entry(pos, struct grave_page, list)); + } + + list_for_each_safe(pos, n, &weak_pages) { + list_del(pos); + kfree(list_entry(pos, struct weak_page, list)); + } + + list_for_each_safe(pos, n, &weak_blocks) { + list_del(pos); + kfree(list_entry(pos, struct weak_block, list)); + } + + kfree(ns); } module_exit(ns_cleanup_module); |