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authorWarner Losh <imp@FreeBSD.org>2019-06-25 04:50:09 +0000
committerWarner Losh <imp@FreeBSD.org>2019-06-25 04:50:09 +0000
commitf5a95d9a07941650493461c255408f5727d0638b (patch)
treeec681c8739341d8c1e8ff3b891e07a31c0fb3ace /sys/dev/nand/nand_cdev.c
parente861dab451869582008237a8c11e97348d2440ce (diff)
downloadsrc-f5a95d9a07941650493461c255408f5727d0638b.tar.gz
src-f5a95d9a07941650493461c255408f5727d0638b.zip
Remove NAND and NANDFS support
NANDFS has been broken for years. Remove it. The NAND drivers that remain are for ancient parts that are no longer relevant. They are polled, have terrible performance and just for ancient arm hardware. NAND parts have evolved significantly from this early work and little to none of it would be relevant should someone need to update to support raw nand. This code has been off by default for years and has violated the vnode protocol leading to panics since it was committed. Numerous posts to arch@ and other locations have found no actual users for this software. Relnotes: Yes No Objection From: arch@ Differential Revision: https://reviews.freebsd.org/D20745
Notes
Notes: svn path=/head/; revision=349352
Diffstat (limited to 'sys/dev/nand/nand_cdev.c')
-rw-r--r--sys/dev/nand/nand_cdev.c454
1 files changed, 0 insertions, 454 deletions
diff --git a/sys/dev/nand/nand_cdev.c b/sys/dev/nand/nand_cdev.c
deleted file mode 100644
index 53c62dbc2913..000000000000
--- a/sys/dev/nand/nand_cdev.c
+++ /dev/null
@@ -1,454 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (C) 2009-2012 Semihalf
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/conf.h>
-#include <sys/bus.h>
-#include <sys/malloc.h>
-#include <sys/uio.h>
-#include <sys/bio.h>
-
-#include <dev/nand/nand.h>
-#include <dev/nand/nandbus.h>
-#include <dev/nand/nand_dev.h>
-#include "nand_if.h"
-#include "nandbus_if.h"
-
-static int nand_page_stat(struct nand_chip *, struct page_stat_io *);
-static int nand_block_stat(struct nand_chip *, struct block_stat_io *);
-
-static d_ioctl_t nand_ioctl;
-static d_open_t nand_open;
-static d_strategy_t nand_strategy;
-
-static struct cdevsw nand_cdevsw = {
- .d_version = D_VERSION,
- .d_name = "nand",
- .d_open = nand_open,
- .d_read = physread,
- .d_write = physwrite,
- .d_ioctl = nand_ioctl,
- .d_strategy = nand_strategy,
-};
-
-static int
-offset_to_page(struct chip_geom *cg, uint32_t offset)
-{
-
- return (offset / cg->page_size);
-}
-
-static int
-offset_to_page_off(struct chip_geom *cg, uint32_t offset)
-{
-
- return (offset % cg->page_size);
-}
-
-int
-nand_make_dev(struct nand_chip *chip)
-{
- struct nandbus_ivar *ivar;
- device_t parent, nandbus;
- int parent_unit, unit;
- char *name;
-
- ivar = device_get_ivars(chip->dev);
- nandbus = device_get_parent(chip->dev);
-
- if (ivar->chip_cdev_name) {
- name = ivar->chip_cdev_name;
-
- /*
- * If we got distinct name for chip device we can enumarete it
- * based on contoller number.
- */
- parent = device_get_parent(nandbus);
- } else {
- name = "nand";
- parent = nandbus;
- }
-
- parent_unit = device_get_unit(parent);
- unit = parent_unit * 4 + chip->num;
- chip->cdev = make_dev(&nand_cdevsw, unit, UID_ROOT, GID_WHEEL,
- 0666, "%s%d.%d", name, parent_unit, chip->num);
-
- if (chip->cdev == NULL)
- return (ENXIO);
-
- if (bootverbose)
- device_printf(chip->dev, "Created cdev %s%d.%d for chip "
- "[0x%0x, 0x%0x]\n", name, parent_unit, chip->num,
- ivar->man_id, ivar->dev_id);
-
- chip->cdev->si_drv1 = chip;
-
- return (0);
-}
-
-void
-nand_destroy_dev(struct nand_chip *chip)
-{
-
- if (chip->cdev)
- destroy_dev(chip->cdev);
-}
-
-static int
-nand_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
-{
-
- return (0);
-}
-
-static int
-nand_read(struct nand_chip *chip, uint32_t offset, void *buf, uint32_t len)
-{
- struct chip_geom *cg;
- device_t nandbus;
- int start_page, count, off, err = 0;
- uint8_t *ptr, *tmp;
-
- nand_debug(NDBG_CDEV, "Read from chip%d [%p] at %d\n", chip->num,
- chip, offset);
-
- nandbus = device_get_parent(chip->dev);
- NANDBUS_LOCK(nandbus);
- NANDBUS_SELECT_CS(device_get_parent(chip->dev), chip->num);
-
- cg = &chip->chip_geom;
- start_page = offset_to_page(cg, offset);
- off = offset_to_page_off(cg, offset);
- count = (len > cg->page_size - off) ? cg->page_size - off : len;
-
- ptr = (uint8_t *)buf;
- while (len > 0) {
- if (len < cg->page_size) {
- tmp = malloc(cg->page_size, M_NAND, M_WAITOK);
- if (!tmp) {
- err = ENOMEM;
- break;
- }
- err = NAND_READ_PAGE(chip->dev, start_page,
- tmp, cg->page_size, 0);
- if (err) {
- free(tmp, M_NAND);
- break;
- }
- bcopy(tmp + off, ptr, count);
- free(tmp, M_NAND);
- } else {
- err = NAND_READ_PAGE(chip->dev, start_page,
- ptr, cg->page_size, 0);
- if (err)
- break;
- }
-
- len -= count;
- start_page++;
- ptr += count;
- count = (len > cg->page_size) ? cg->page_size : len;
- off = 0;
- }
-
- NANDBUS_UNLOCK(nandbus);
- return (err);
-}
-
-static int
-nand_write(struct nand_chip *chip, uint32_t offset, void* buf, uint32_t len)
-{
- struct chip_geom *cg;
- device_t nandbus;
- int off, start_page, err = 0;
- uint8_t *ptr;
-
- nand_debug(NDBG_CDEV, "Write to chip %d [%p] at %d\n", chip->num,
- chip, offset);
-
- nandbus = device_get_parent(chip->dev);
- NANDBUS_LOCK(nandbus);
- NANDBUS_SELECT_CS(device_get_parent(chip->dev), chip->num);
-
- cg = &chip->chip_geom;
- start_page = offset_to_page(cg, offset);
- off = offset_to_page_off(cg, offset);
-
- if (off != 0 || (len % cg->page_size) != 0) {
- printf("Not aligned write start [0x%08x] size [0x%08x]\n",
- off, len);
- NANDBUS_UNLOCK(nandbus);
- return (EINVAL);
- }
-
- ptr = (uint8_t *)buf;
- while (len > 0) {
- err = NAND_PROGRAM_PAGE(chip->dev, start_page, ptr,
- cg->page_size, 0);
- if (err)
- break;
-
- len -= cg->page_size;
- start_page++;
- ptr += cg->page_size;
- }
-
- NANDBUS_UNLOCK(nandbus);
- return (err);
-}
-
-static void
-nand_strategy(struct bio *bp)
-{
- struct nand_chip *chip;
- struct cdev *dev;
- int err = 0;
-
- dev = bp->bio_dev;
- chip = dev->si_drv1;
-
- nand_debug(NDBG_CDEV, "Strategy %s on chip %d [%p]\n",
- bp->bio_cmd == BIO_READ ? "READ" : "WRITE",
- chip->num, chip);
-
- if (bp->bio_cmd == BIO_READ) {
- err = nand_read(chip,
- bp->bio_offset & 0xffffffff,
- bp->bio_data, bp->bio_bcount);
- } else {
- err = nand_write(chip,
- bp->bio_offset & 0xffffffff,
- bp->bio_data, bp->bio_bcount);
- }
-
- if (err == 0)
- bp->bio_resid = 0;
- else {
- bp->bio_error = EIO;
- bp->bio_flags |= BIO_ERROR;
- bp->bio_resid = bp->bio_bcount;
- }
-
- biodone(bp);
-}
-
-static int
-nand_oob_access(struct nand_chip *chip, uint32_t page, uint32_t offset,
- uint32_t len, uint8_t *data, uint8_t write)
-{
- struct chip_geom *cg;
- uint8_t *buf = NULL;
- int ret = 0;
-
- cg = &chip->chip_geom;
-
- buf = malloc(cg->oob_size, M_NAND, M_WAITOK);
- if (!buf)
- return (ENOMEM);
-
- memset(buf, 0xff, cg->oob_size);
-
- if (!write) {
- ret = nand_read_oob(chip, page, buf, cg->oob_size);
- copyout(buf, data, len);
- } else {
- copyin(data, buf, len);
- ret = nand_prog_oob(chip, page, buf, cg->oob_size);
- }
-
- free(buf, M_NAND);
-
- return (ret);
-}
-
-static int
-nand_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
- struct thread *td)
-{
- struct nand_chip *chip;
- struct chip_geom *cg;
- struct nand_oob_rw *oob_rw = NULL;
- struct nand_raw_rw *raw_rw = NULL;
- device_t nandbus;
- size_t bufsize = 0, len = 0;
- size_t raw_size;
- off_t off;
- uint8_t *buf = NULL;
- int ret = 0;
- uint8_t status;
-
- chip = (struct nand_chip *)dev->si_drv1;
- cg = &chip->chip_geom;
- nandbus = device_get_parent(chip->dev);
-
- if ((cmd == NAND_IO_RAW_READ) || (cmd == NAND_IO_RAW_PROG)) {
- raw_rw = (struct nand_raw_rw *)data;
- raw_size = cg->pgs_per_blk * (cg->page_size + cg->oob_size);
-
- /* Check if len is not bigger than chip size */
- if (raw_rw->len > raw_size)
- return (EFBIG);
-
- /*
- * Do not ask for too much memory, in case of large transfers
- * read/write in 16-pages chunks
- */
- bufsize = 16 * (cg->page_size + cg->oob_size);
- if (raw_rw->len < bufsize)
- bufsize = raw_rw->len;
-
- buf = malloc(bufsize, M_NAND, M_WAITOK);
- len = raw_rw->len;
- off = 0;
- }
- switch(cmd) {
- case NAND_IO_ERASE:
- ret = nand_erase_blocks(chip, ((off_t *)data)[0],
- ((off_t *)data)[1]);
- break;
-
- case NAND_IO_OOB_READ:
- oob_rw = (struct nand_oob_rw *)data;
- ret = nand_oob_access(chip, oob_rw->page, 0,
- oob_rw->len, oob_rw->data, 0);
- break;
-
- case NAND_IO_OOB_PROG:
- oob_rw = (struct nand_oob_rw *)data;
- ret = nand_oob_access(chip, oob_rw->page, 0,
- oob_rw->len, oob_rw->data, 1);
- break;
-
- case NAND_IO_GET_STATUS:
- NANDBUS_LOCK(nandbus);
- ret = NANDBUS_GET_STATUS(nandbus, &status);
- if (ret == 0)
- *(uint8_t *)data = status;
- NANDBUS_UNLOCK(nandbus);
- break;
-
- case NAND_IO_RAW_PROG:
- while (len > 0) {
- if (len < bufsize)
- bufsize = len;
- ret = copyin(raw_rw->data + off, buf, bufsize);
- if (ret)
- break;
- ret = nand_prog_pages_raw(chip, raw_rw->off + off, buf,
- bufsize);
- if (ret)
- break;
- len -= bufsize;
- off += bufsize;
- }
- break;
-
- case NAND_IO_RAW_READ:
- while (len > 0) {
- if (len < bufsize)
- bufsize = len;
-
- ret = nand_read_pages_raw(chip, raw_rw->off + off, buf,
- bufsize);
- if (ret)
- break;
-
- ret = copyout(buf, raw_rw->data + off, bufsize);
- if (ret)
- break;
- len -= bufsize;
- off += bufsize;
- }
- break;
-
- case NAND_IO_PAGE_STAT:
- ret = nand_page_stat(chip, (struct page_stat_io *)data);
- break;
-
- case NAND_IO_BLOCK_STAT:
- ret = nand_block_stat(chip, (struct block_stat_io *)data);
- break;
-
- case NAND_IO_GET_CHIP_PARAM:
- nand_get_chip_param(chip, (struct chip_param_io *)data);
- break;
-
- default:
- printf("Unknown nand_ioctl request \n");
- ret = EIO;
- }
-
- if (buf)
- free(buf, M_NAND);
-
- return (ret);
-}
-
-static int
-nand_page_stat(struct nand_chip *chip, struct page_stat_io *page_stat)
-{
- struct chip_geom *cg;
- struct page_stat *stat;
- int num_pages;
-
- cg = &chip->chip_geom;
- num_pages = cg->pgs_per_blk * cg->blks_per_lun * cg->luns;
- if (page_stat->page_num >= num_pages)
- return (EINVAL);
-
- stat = &chip->pg_stat[page_stat->page_num];
- page_stat->page_read = stat->page_read;
- page_stat->page_written = stat->page_written;
- page_stat->page_raw_read = stat->page_raw_read;
- page_stat->page_raw_written = stat->page_raw_written;
- page_stat->ecc_succeded = stat->ecc_stat.ecc_succeded;
- page_stat->ecc_corrected = stat->ecc_stat.ecc_corrected;
- page_stat->ecc_failed = stat->ecc_stat.ecc_failed;
-
- return (0);
-}
-
-static int
-nand_block_stat(struct nand_chip *chip, struct block_stat_io *block_stat)
-{
- struct chip_geom *cg;
- uint32_t block_num = block_stat->block_num;
-
- cg = &chip->chip_geom;
- if (block_num >= cg->blks_per_lun * cg->luns)
- return (EINVAL);
-
- block_stat->block_erased = chip->blk_stat[block_num].block_erased;
-
- return (0);
-}