mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Here's the big char/misc driver patches for 4.10-rc1. Lots of tiny changes over lots of "minor" driver subsystems, the largest being some new FPGA drivers. Other than that, a few other new drivers, but no new driver subsystems added for this kernel cycle, a nice change. All of these have been in linux-next with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWFAtwA8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ykyCgCeJn36u1AsBi7qZ3u/1hwD8k56s2IAnRo6U31r WW65YcNTK7qYXqNbfgIa =/t/V -----END PGP SIGNATURE----- Merge tag 'char-misc-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver updates from Greg KH: "Here's the big char/misc driver patches for 4.10-rc1. Lots of tiny changes over lots of "minor" driver subsystems, the largest being some new FPGA drivers. Other than that, a few other new drivers, but no new driver subsystems added for this kernel cycle, a nice change. All of these have been in linux-next with no reported issues" * tag 'char-misc-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (107 commits) uio-hv-generic: store physical addresses instead of virtual Tools: hv: kvp: configurable external scripts path uio-hv-generic: new userspace i/o driver for VMBus vmbus: add support for dynamic device id's hv: change clockevents unbind tactics hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels() hyperv: Fix spelling of HV_UNKOWN mei: bus: enable non-blocking RX mei: fix the back to back interrupt handling mei: synchronize irq before initiating a reset. VME: Remove shutdown entry from vme_driver auxdisplay: ht16k33: select framebuffer helper modules MAINTAINERS: add git url for fpga fpga: Clarify how write_init works streaming modes fpga zynq: Fix incorrect ISR state on bootup fpga zynq: Remove priv->dev fpga zynq: Add missing \n to messages fpga: Add COMPILE_TEST to all drivers uio: pruss: add clk_disable() char/pcmcia: add some error checking in scr24x_read() ...
1132 lines
25 KiB
C
1132 lines
25 KiB
C
/*
|
|
* Copyright (C) 2015 IT University of Copenhagen. All rights reserved.
|
|
* Initial release: Matias Bjorling <m@bjorling.me>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation.
|
|
*
|
|
* 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; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
|
|
* USA.
|
|
*
|
|
*/
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/types.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/bitmap.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/lightnvm.h>
|
|
#include <linux/sched/sysctl.h>
|
|
|
|
static LIST_HEAD(nvm_tgt_types);
|
|
static DECLARE_RWSEM(nvm_tgtt_lock);
|
|
static LIST_HEAD(nvm_mgrs);
|
|
static LIST_HEAD(nvm_devices);
|
|
static DECLARE_RWSEM(nvm_lock);
|
|
|
|
struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock)
|
|
{
|
|
struct nvm_tgt_type *tmp, *tt = NULL;
|
|
|
|
if (lock)
|
|
down_write(&nvm_tgtt_lock);
|
|
|
|
list_for_each_entry(tmp, &nvm_tgt_types, list)
|
|
if (!strcmp(name, tmp->name)) {
|
|
tt = tmp;
|
|
break;
|
|
}
|
|
|
|
if (lock)
|
|
up_write(&nvm_tgtt_lock);
|
|
return tt;
|
|
}
|
|
EXPORT_SYMBOL(nvm_find_target_type);
|
|
|
|
int nvm_register_tgt_type(struct nvm_tgt_type *tt)
|
|
{
|
|
int ret = 0;
|
|
|
|
down_write(&nvm_tgtt_lock);
|
|
if (nvm_find_target_type(tt->name, 0))
|
|
ret = -EEXIST;
|
|
else
|
|
list_add(&tt->list, &nvm_tgt_types);
|
|
up_write(&nvm_tgtt_lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(nvm_register_tgt_type);
|
|
|
|
void nvm_unregister_tgt_type(struct nvm_tgt_type *tt)
|
|
{
|
|
if (!tt)
|
|
return;
|
|
|
|
down_write(&nvm_lock);
|
|
list_del(&tt->list);
|
|
up_write(&nvm_lock);
|
|
}
|
|
EXPORT_SYMBOL(nvm_unregister_tgt_type);
|
|
|
|
void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags,
|
|
dma_addr_t *dma_handler)
|
|
{
|
|
return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags,
|
|
dma_handler);
|
|
}
|
|
EXPORT_SYMBOL(nvm_dev_dma_alloc);
|
|
|
|
void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler)
|
|
{
|
|
dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler);
|
|
}
|
|
EXPORT_SYMBOL(nvm_dev_dma_free);
|
|
|
|
static struct nvmm_type *nvm_find_mgr_type(const char *name)
|
|
{
|
|
struct nvmm_type *mt;
|
|
|
|
list_for_each_entry(mt, &nvm_mgrs, list)
|
|
if (!strcmp(name, mt->name))
|
|
return mt;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev)
|
|
{
|
|
struct nvmm_type *mt;
|
|
int ret;
|
|
|
|
lockdep_assert_held(&nvm_lock);
|
|
|
|
list_for_each_entry(mt, &nvm_mgrs, list) {
|
|
if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN))
|
|
continue;
|
|
|
|
ret = mt->register_mgr(dev);
|
|
if (ret < 0) {
|
|
pr_err("nvm: media mgr failed to init (%d) on dev %s\n",
|
|
ret, dev->name);
|
|
return NULL; /* initialization failed */
|
|
} else if (ret > 0)
|
|
return mt;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int nvm_register_mgr(struct nvmm_type *mt)
|
|
{
|
|
struct nvm_dev *dev;
|
|
int ret = 0;
|
|
|
|
down_write(&nvm_lock);
|
|
if (nvm_find_mgr_type(mt->name)) {
|
|
ret = -EEXIST;
|
|
goto finish;
|
|
} else {
|
|
list_add(&mt->list, &nvm_mgrs);
|
|
}
|
|
|
|
/* try to register media mgr if any device have none configured */
|
|
list_for_each_entry(dev, &nvm_devices, devices) {
|
|
if (dev->mt)
|
|
continue;
|
|
|
|
dev->mt = nvm_init_mgr(dev);
|
|
}
|
|
finish:
|
|
up_write(&nvm_lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(nvm_register_mgr);
|
|
|
|
void nvm_unregister_mgr(struct nvmm_type *mt)
|
|
{
|
|
if (!mt)
|
|
return;
|
|
|
|
down_write(&nvm_lock);
|
|
list_del(&mt->list);
|
|
up_write(&nvm_lock);
|
|
}
|
|
EXPORT_SYMBOL(nvm_unregister_mgr);
|
|
|
|
static struct nvm_dev *nvm_find_nvm_dev(const char *name)
|
|
{
|
|
struct nvm_dev *dev;
|
|
|
|
list_for_each_entry(dev, &nvm_devices, devices)
|
|
if (!strcmp(name, dev->name))
|
|
return dev;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void nvm_tgt_generic_to_addr_mode(struct nvm_tgt_dev *tgt_dev,
|
|
struct nvm_rq *rqd)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
int i;
|
|
|
|
if (rqd->nr_ppas > 1) {
|
|
for (i = 0; i < rqd->nr_ppas; i++) {
|
|
rqd->ppa_list[i] = dev->mt->trans_ppa(tgt_dev,
|
|
rqd->ppa_list[i], TRANS_TGT_TO_DEV);
|
|
rqd->ppa_list[i] = generic_to_dev_addr(dev,
|
|
rqd->ppa_list[i]);
|
|
}
|
|
} else {
|
|
rqd->ppa_addr = dev->mt->trans_ppa(tgt_dev, rqd->ppa_addr,
|
|
TRANS_TGT_TO_DEV);
|
|
rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
|
|
}
|
|
}
|
|
|
|
int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas,
|
|
int type)
|
|
{
|
|
struct nvm_rq rqd;
|
|
int ret;
|
|
|
|
if (nr_ppas > dev->ops->max_phys_sect) {
|
|
pr_err("nvm: unable to update all sysblocks atomically\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
memset(&rqd, 0, sizeof(struct nvm_rq));
|
|
|
|
nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1);
|
|
nvm_generic_to_addr_mode(dev, &rqd);
|
|
|
|
ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
|
|
nvm_free_rqd_ppalist(dev, &rqd);
|
|
if (ret) {
|
|
pr_err("nvm: sysblk failed bb mark\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(nvm_set_bb_tbl);
|
|
|
|
int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
|
|
int nr_ppas, int type)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
struct nvm_rq rqd;
|
|
int ret;
|
|
|
|
if (nr_ppas > dev->ops->max_phys_sect) {
|
|
pr_err("nvm: unable to update all blocks atomically\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
memset(&rqd, 0, sizeof(struct nvm_rq));
|
|
|
|
nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1);
|
|
nvm_tgt_generic_to_addr_mode(tgt_dev, &rqd);
|
|
|
|
ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
|
|
nvm_free_rqd_ppalist(dev, &rqd);
|
|
if (ret) {
|
|
pr_err("nvm: sysblk failed bb mark\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(nvm_set_tgt_bb_tbl);
|
|
|
|
int nvm_max_phys_sects(struct nvm_tgt_dev *tgt_dev)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
|
|
return dev->ops->max_phys_sect;
|
|
}
|
|
EXPORT_SYMBOL(nvm_max_phys_sects);
|
|
|
|
int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
|
|
return dev->mt->submit_io(tgt_dev, rqd);
|
|
}
|
|
EXPORT_SYMBOL(nvm_submit_io);
|
|
|
|
int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, int flags)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
|
|
return dev->mt->erase_blk(tgt_dev, p, flags);
|
|
}
|
|
EXPORT_SYMBOL(nvm_erase_blk);
|
|
|
|
int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb,
|
|
nvm_l2p_update_fn *update_l2p, void *priv)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
|
|
if (!dev->ops->get_l2p_tbl)
|
|
return 0;
|
|
|
|
return dev->ops->get_l2p_tbl(dev, slba, nlb, update_l2p, priv);
|
|
}
|
|
EXPORT_SYMBOL(nvm_get_l2p_tbl);
|
|
|
|
int nvm_get_area(struct nvm_tgt_dev *tgt_dev, sector_t *lba, sector_t len)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
|
|
return dev->mt->get_area(dev, lba, len);
|
|
}
|
|
EXPORT_SYMBOL(nvm_get_area);
|
|
|
|
void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t lba)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
|
|
dev->mt->put_area(dev, lba);
|
|
}
|
|
EXPORT_SYMBOL(nvm_put_area);
|
|
|
|
void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
|
|
{
|
|
int i;
|
|
|
|
if (rqd->nr_ppas > 1) {
|
|
for (i = 0; i < rqd->nr_ppas; i++)
|
|
rqd->ppa_list[i] = dev_to_generic_addr(dev,
|
|
rqd->ppa_list[i]);
|
|
} else {
|
|
rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(nvm_addr_to_generic_mode);
|
|
|
|
void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
|
|
{
|
|
int i;
|
|
|
|
if (rqd->nr_ppas > 1) {
|
|
for (i = 0; i < rqd->nr_ppas; i++)
|
|
rqd->ppa_list[i] = generic_to_dev_addr(dev,
|
|
rqd->ppa_list[i]);
|
|
} else {
|
|
rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(nvm_generic_to_addr_mode);
|
|
|
|
int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
|
|
const struct ppa_addr *ppas, int nr_ppas, int vblk)
|
|
{
|
|
struct nvm_geo *geo = &dev->geo;
|
|
int i, plane_cnt, pl_idx;
|
|
struct ppa_addr ppa;
|
|
|
|
if ((!vblk || geo->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) {
|
|
rqd->nr_ppas = nr_ppas;
|
|
rqd->ppa_addr = ppas[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
rqd->nr_ppas = nr_ppas;
|
|
rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list);
|
|
if (!rqd->ppa_list) {
|
|
pr_err("nvm: failed to allocate dma memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (!vblk) {
|
|
for (i = 0; i < nr_ppas; i++)
|
|
rqd->ppa_list[i] = ppas[i];
|
|
} else {
|
|
plane_cnt = geo->plane_mode;
|
|
rqd->nr_ppas *= plane_cnt;
|
|
|
|
for (i = 0; i < nr_ppas; i++) {
|
|
for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
|
|
ppa = ppas[i];
|
|
ppa.g.pl = pl_idx;
|
|
rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(nvm_set_rqd_ppalist);
|
|
|
|
void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd)
|
|
{
|
|
if (!rqd->ppa_list)
|
|
return;
|
|
|
|
nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list);
|
|
}
|
|
EXPORT_SYMBOL(nvm_free_rqd_ppalist);
|
|
|
|
int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas,
|
|
int flags)
|
|
{
|
|
struct nvm_rq rqd;
|
|
int ret;
|
|
|
|
if (!dev->ops->erase_block)
|
|
return 0;
|
|
|
|
memset(&rqd, 0, sizeof(struct nvm_rq));
|
|
|
|
ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
nvm_generic_to_addr_mode(dev, &rqd);
|
|
|
|
rqd.flags = flags;
|
|
|
|
ret = dev->ops->erase_block(dev, &rqd);
|
|
|
|
nvm_free_rqd_ppalist(dev, &rqd);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(nvm_erase_ppa);
|
|
|
|
void nvm_end_io(struct nvm_rq *rqd, int error)
|
|
{
|
|
rqd->error = error;
|
|
rqd->end_io(rqd);
|
|
}
|
|
EXPORT_SYMBOL(nvm_end_io);
|
|
|
|
static void nvm_end_io_sync(struct nvm_rq *rqd)
|
|
{
|
|
struct completion *waiting = rqd->wait;
|
|
|
|
rqd->wait = NULL;
|
|
|
|
complete(waiting);
|
|
}
|
|
|
|
static int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode,
|
|
int flags, void *buf, int len)
|
|
{
|
|
DECLARE_COMPLETION_ONSTACK(wait);
|
|
struct bio *bio;
|
|
int ret;
|
|
unsigned long hang_check;
|
|
|
|
bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL);
|
|
if (IS_ERR_OR_NULL(bio))
|
|
return -ENOMEM;
|
|
|
|
nvm_generic_to_addr_mode(dev, rqd);
|
|
|
|
rqd->dev = NULL;
|
|
rqd->opcode = opcode;
|
|
rqd->flags = flags;
|
|
rqd->bio = bio;
|
|
rqd->wait = &wait;
|
|
rqd->end_io = nvm_end_io_sync;
|
|
|
|
ret = dev->ops->submit_io(dev, rqd);
|
|
if (ret) {
|
|
bio_put(bio);
|
|
return ret;
|
|
}
|
|
|
|
/* Prevent hang_check timer from firing at us during very long I/O */
|
|
hang_check = sysctl_hung_task_timeout_secs;
|
|
if (hang_check)
|
|
while (!wait_for_completion_io_timeout(&wait,
|
|
hang_check * (HZ/2)))
|
|
;
|
|
else
|
|
wait_for_completion_io(&wait);
|
|
|
|
return rqd->error;
|
|
}
|
|
|
|
/**
|
|
* nvm_submit_ppa_list - submit user-defined ppa list to device. The user must
|
|
* take to free ppa list if necessary.
|
|
* @dev: device
|
|
* @ppa_list: user created ppa_list
|
|
* @nr_ppas: length of ppa_list
|
|
* @opcode: device opcode
|
|
* @flags: device flags
|
|
* @buf: data buffer
|
|
* @len: data buffer length
|
|
*/
|
|
int nvm_submit_ppa_list(struct nvm_dev *dev, struct ppa_addr *ppa_list,
|
|
int nr_ppas, int opcode, int flags, void *buf, int len)
|
|
{
|
|
struct nvm_rq rqd;
|
|
|
|
if (dev->ops->max_phys_sect < nr_ppas)
|
|
return -EINVAL;
|
|
|
|
memset(&rqd, 0, sizeof(struct nvm_rq));
|
|
|
|
rqd.nr_ppas = nr_ppas;
|
|
if (nr_ppas > 1)
|
|
rqd.ppa_list = ppa_list;
|
|
else
|
|
rqd.ppa_addr = ppa_list[0];
|
|
|
|
return __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len);
|
|
}
|
|
EXPORT_SYMBOL(nvm_submit_ppa_list);
|
|
|
|
/**
|
|
* nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded
|
|
* as single, dual, quad plane PPAs depending on device type.
|
|
* @dev: device
|
|
* @ppa: user created ppa_list
|
|
* @nr_ppas: length of ppa_list
|
|
* @opcode: device opcode
|
|
* @flags: device flags
|
|
* @buf: data buffer
|
|
* @len: data buffer length
|
|
*/
|
|
int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
|
|
int opcode, int flags, void *buf, int len)
|
|
{
|
|
struct nvm_rq rqd;
|
|
int ret;
|
|
|
|
memset(&rqd, 0, sizeof(struct nvm_rq));
|
|
ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len);
|
|
|
|
nvm_free_rqd_ppalist(dev, &rqd);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(nvm_submit_ppa);
|
|
|
|
/*
|
|
* folds a bad block list from its plane representation to its virtual
|
|
* block representation. The fold is done in place and reduced size is
|
|
* returned.
|
|
*
|
|
* If any of the planes status are bad or grown bad block, the virtual block
|
|
* is marked bad. If not bad, the first plane state acts as the block state.
|
|
*/
|
|
int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
|
|
{
|
|
struct nvm_geo *geo = &dev->geo;
|
|
int blk, offset, pl, blktype;
|
|
|
|
if (nr_blks != geo->blks_per_lun * geo->plane_mode)
|
|
return -EINVAL;
|
|
|
|
for (blk = 0; blk < geo->blks_per_lun; blk++) {
|
|
offset = blk * geo->plane_mode;
|
|
blktype = blks[offset];
|
|
|
|
/* Bad blocks on any planes take precedence over other types */
|
|
for (pl = 0; pl < geo->plane_mode; pl++) {
|
|
if (blks[offset + pl] &
|
|
(NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
|
|
blktype = blks[offset + pl];
|
|
break;
|
|
}
|
|
}
|
|
|
|
blks[blk] = blktype;
|
|
}
|
|
|
|
return geo->blks_per_lun;
|
|
}
|
|
EXPORT_SYMBOL(nvm_bb_tbl_fold);
|
|
|
|
int nvm_get_bb_tbl(struct nvm_dev *dev, struct ppa_addr ppa, u8 *blks)
|
|
{
|
|
ppa = generic_to_dev_addr(dev, ppa);
|
|
|
|
return dev->ops->get_bb_tbl(dev, ppa, blks);
|
|
}
|
|
EXPORT_SYMBOL(nvm_get_bb_tbl);
|
|
|
|
int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa,
|
|
u8 *blks)
|
|
{
|
|
struct nvm_dev *dev = tgt_dev->parent;
|
|
|
|
ppa = dev->mt->trans_ppa(tgt_dev, ppa, TRANS_TGT_TO_DEV);
|
|
return nvm_get_bb_tbl(dev, ppa, blks);
|
|
}
|
|
EXPORT_SYMBOL(nvm_get_tgt_bb_tbl);
|
|
|
|
static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp)
|
|
{
|
|
struct nvm_geo *geo = &dev->geo;
|
|
int i;
|
|
|
|
dev->lps_per_blk = geo->pgs_per_blk;
|
|
dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL);
|
|
if (!dev->lptbl)
|
|
return -ENOMEM;
|
|
|
|
/* Just a linear array */
|
|
for (i = 0; i < dev->lps_per_blk; i++)
|
|
dev->lptbl[i] = i;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp)
|
|
{
|
|
int i, p;
|
|
struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc;
|
|
|
|
if (!mlc->num_pairs)
|
|
return 0;
|
|
|
|
dev->lps_per_blk = mlc->num_pairs;
|
|
dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL);
|
|
if (!dev->lptbl)
|
|
return -ENOMEM;
|
|
|
|
/* The lower page table encoding consists of a list of bytes, where each
|
|
* has a lower and an upper half. The first half byte maintains the
|
|
* increment value and every value after is an offset added to the
|
|
* previous incrementation value
|
|
*/
|
|
dev->lptbl[0] = mlc->pairs[0] & 0xF;
|
|
for (i = 1; i < dev->lps_per_blk; i++) {
|
|
p = mlc->pairs[i >> 1];
|
|
if (i & 0x1) /* upper */
|
|
dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4);
|
|
else /* lower */
|
|
dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvm_core_init(struct nvm_dev *dev)
|
|
{
|
|
struct nvm_id *id = &dev->identity;
|
|
struct nvm_id_group *grp = &id->groups[0];
|
|
struct nvm_geo *geo = &dev->geo;
|
|
int ret;
|
|
|
|
/* Whole device values */
|
|
geo->nr_chnls = grp->num_ch;
|
|
geo->luns_per_chnl = grp->num_lun;
|
|
|
|
/* Generic device values */
|
|
geo->pgs_per_blk = grp->num_pg;
|
|
geo->blks_per_lun = grp->num_blk;
|
|
geo->nr_planes = grp->num_pln;
|
|
geo->fpg_size = grp->fpg_sz;
|
|
geo->pfpg_size = grp->fpg_sz * grp->num_pln;
|
|
geo->sec_size = grp->csecs;
|
|
geo->oob_size = grp->sos;
|
|
geo->sec_per_pg = grp->fpg_sz / grp->csecs;
|
|
geo->mccap = grp->mccap;
|
|
memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
|
|
|
|
geo->plane_mode = NVM_PLANE_SINGLE;
|
|
geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size;
|
|
|
|
if (grp->mpos & 0x020202)
|
|
geo->plane_mode = NVM_PLANE_DOUBLE;
|
|
if (grp->mpos & 0x040404)
|
|
geo->plane_mode = NVM_PLANE_QUAD;
|
|
|
|
if (grp->mtype != 0) {
|
|
pr_err("nvm: memory type not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* calculated values */
|
|
geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes;
|
|
geo->sec_per_blk = geo->sec_per_pl * geo->pgs_per_blk;
|
|
geo->sec_per_lun = geo->sec_per_blk * geo->blks_per_lun;
|
|
geo->nr_luns = geo->luns_per_chnl * geo->nr_chnls;
|
|
|
|
dev->total_secs = geo->nr_luns * geo->sec_per_lun;
|
|
dev->lun_map = kcalloc(BITS_TO_LONGS(geo->nr_luns),
|
|
sizeof(unsigned long), GFP_KERNEL);
|
|
if (!dev->lun_map)
|
|
return -ENOMEM;
|
|
|
|
switch (grp->fmtype) {
|
|
case NVM_ID_FMTYPE_SLC:
|
|
if (nvm_init_slc_tbl(dev, grp)) {
|
|
ret = -ENOMEM;
|
|
goto err_fmtype;
|
|
}
|
|
break;
|
|
case NVM_ID_FMTYPE_MLC:
|
|
if (nvm_init_mlc_tbl(dev, grp)) {
|
|
ret = -ENOMEM;
|
|
goto err_fmtype;
|
|
}
|
|
break;
|
|
default:
|
|
pr_err("nvm: flash type not supported\n");
|
|
ret = -EINVAL;
|
|
goto err_fmtype;
|
|
}
|
|
|
|
mutex_init(&dev->mlock);
|
|
spin_lock_init(&dev->lock);
|
|
|
|
blk_queue_logical_block_size(dev->q, geo->sec_size);
|
|
|
|
return 0;
|
|
err_fmtype:
|
|
kfree(dev->lun_map);
|
|
return ret;
|
|
}
|
|
|
|
static void nvm_free_mgr(struct nvm_dev *dev)
|
|
{
|
|
if (!dev->mt)
|
|
return;
|
|
|
|
dev->mt->unregister_mgr(dev);
|
|
dev->mt = NULL;
|
|
}
|
|
|
|
void nvm_free(struct nvm_dev *dev)
|
|
{
|
|
if (!dev)
|
|
return;
|
|
|
|
nvm_free_mgr(dev);
|
|
|
|
if (dev->dma_pool)
|
|
dev->ops->destroy_dma_pool(dev->dma_pool);
|
|
|
|
kfree(dev->lptbl);
|
|
kfree(dev->lun_map);
|
|
kfree(dev);
|
|
}
|
|
|
|
static int nvm_init(struct nvm_dev *dev)
|
|
{
|
|
struct nvm_geo *geo = &dev->geo;
|
|
int ret = -EINVAL;
|
|
|
|
if (!dev->q || !dev->ops)
|
|
return ret;
|
|
|
|
if (dev->ops->identity(dev, &dev->identity)) {
|
|
pr_err("nvm: device could not be identified\n");
|
|
goto err;
|
|
}
|
|
|
|
pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n",
|
|
dev->identity.ver_id, dev->identity.vmnt,
|
|
dev->identity.cgrps);
|
|
|
|
if (dev->identity.ver_id != 1) {
|
|
pr_err("nvm: device not supported by kernel.");
|
|
goto err;
|
|
}
|
|
|
|
if (dev->identity.cgrps != 1) {
|
|
pr_err("nvm: only one group configuration supported.");
|
|
goto err;
|
|
}
|
|
|
|
ret = nvm_core_init(dev);
|
|
if (ret) {
|
|
pr_err("nvm: could not initialize core structures.\n");
|
|
goto err;
|
|
}
|
|
|
|
pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n",
|
|
dev->name, geo->sec_per_pg, geo->nr_planes,
|
|
geo->pgs_per_blk, geo->blks_per_lun,
|
|
geo->nr_luns, geo->nr_chnls);
|
|
return 0;
|
|
err:
|
|
pr_err("nvm: failed to initialize nvm\n");
|
|
return ret;
|
|
}
|
|
|
|
struct nvm_dev *nvm_alloc_dev(int node)
|
|
{
|
|
return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node);
|
|
}
|
|
EXPORT_SYMBOL(nvm_alloc_dev);
|
|
|
|
int nvm_register(struct nvm_dev *dev)
|
|
{
|
|
int ret;
|
|
|
|
ret = nvm_init(dev);
|
|
if (ret)
|
|
goto err_init;
|
|
|
|
if (dev->ops->max_phys_sect > 256) {
|
|
pr_info("nvm: max sectors supported is 256.\n");
|
|
ret = -EINVAL;
|
|
goto err_init;
|
|
}
|
|
|
|
if (dev->ops->max_phys_sect > 1) {
|
|
dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist");
|
|
if (!dev->dma_pool) {
|
|
pr_err("nvm: could not create dma pool\n");
|
|
ret = -ENOMEM;
|
|
goto err_init;
|
|
}
|
|
}
|
|
|
|
if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
|
|
ret = nvm_get_sysblock(dev, &dev->sb);
|
|
if (!ret)
|
|
pr_err("nvm: device not initialized.\n");
|
|
else if (ret < 0)
|
|
pr_err("nvm: err (%d) on device initialization\n", ret);
|
|
}
|
|
|
|
/* register device with a supported media manager */
|
|
down_write(&nvm_lock);
|
|
if (ret > 0)
|
|
dev->mt = nvm_init_mgr(dev);
|
|
list_add(&dev->devices, &nvm_devices);
|
|
up_write(&nvm_lock);
|
|
|
|
return 0;
|
|
err_init:
|
|
kfree(dev->lun_map);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(nvm_register);
|
|
|
|
void nvm_unregister(struct nvm_dev *dev)
|
|
{
|
|
down_write(&nvm_lock);
|
|
list_del(&dev->devices);
|
|
up_write(&nvm_lock);
|
|
|
|
nvm_free(dev);
|
|
}
|
|
EXPORT_SYMBOL(nvm_unregister);
|
|
|
|
static int __nvm_configure_create(struct nvm_ioctl_create *create)
|
|
{
|
|
struct nvm_dev *dev;
|
|
struct nvm_ioctl_create_simple *s;
|
|
|
|
down_write(&nvm_lock);
|
|
dev = nvm_find_nvm_dev(create->dev);
|
|
up_write(&nvm_lock);
|
|
|
|
if (!dev) {
|
|
pr_err("nvm: device not found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!dev->mt) {
|
|
pr_info("nvm: device has no media manager registered.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) {
|
|
pr_err("nvm: config type not valid\n");
|
|
return -EINVAL;
|
|
}
|
|
s = &create->conf.s;
|
|
|
|
if (s->lun_begin > s->lun_end || s->lun_end > dev->geo.nr_luns) {
|
|
pr_err("nvm: lun out of bound (%u:%u > %u)\n",
|
|
s->lun_begin, s->lun_end, dev->geo.nr_luns);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return dev->mt->create_tgt(dev, create);
|
|
}
|
|
|
|
static long nvm_ioctl_info(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_info *info;
|
|
struct nvm_tgt_type *tt;
|
|
int tgt_iter = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
info = memdup_user(arg, sizeof(struct nvm_ioctl_info));
|
|
if (IS_ERR(info))
|
|
return -EFAULT;
|
|
|
|
info->version[0] = NVM_VERSION_MAJOR;
|
|
info->version[1] = NVM_VERSION_MINOR;
|
|
info->version[2] = NVM_VERSION_PATCH;
|
|
|
|
down_write(&nvm_lock);
|
|
list_for_each_entry(tt, &nvm_tgt_types, list) {
|
|
struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter];
|
|
|
|
tgt->version[0] = tt->version[0];
|
|
tgt->version[1] = tt->version[1];
|
|
tgt->version[2] = tt->version[2];
|
|
strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX);
|
|
|
|
tgt_iter++;
|
|
}
|
|
|
|
info->tgtsize = tgt_iter;
|
|
up_write(&nvm_lock);
|
|
|
|
if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) {
|
|
kfree(info);
|
|
return -EFAULT;
|
|
}
|
|
|
|
kfree(info);
|
|
return 0;
|
|
}
|
|
|
|
static long nvm_ioctl_get_devices(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_get_devices *devices;
|
|
struct nvm_dev *dev;
|
|
int i = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL);
|
|
if (!devices)
|
|
return -ENOMEM;
|
|
|
|
down_write(&nvm_lock);
|
|
list_for_each_entry(dev, &nvm_devices, devices) {
|
|
struct nvm_ioctl_device_info *info = &devices->info[i];
|
|
|
|
sprintf(info->devname, "%s", dev->name);
|
|
if (dev->mt) {
|
|
info->bmversion[0] = dev->mt->version[0];
|
|
info->bmversion[1] = dev->mt->version[1];
|
|
info->bmversion[2] = dev->mt->version[2];
|
|
sprintf(info->bmname, "%s", dev->mt->name);
|
|
} else {
|
|
sprintf(info->bmname, "none");
|
|
}
|
|
|
|
i++;
|
|
if (i > 31) {
|
|
pr_err("nvm: max 31 devices can be reported.\n");
|
|
break;
|
|
}
|
|
}
|
|
up_write(&nvm_lock);
|
|
|
|
devices->nr_devices = i;
|
|
|
|
if (copy_to_user(arg, devices,
|
|
sizeof(struct nvm_ioctl_get_devices))) {
|
|
kfree(devices);
|
|
return -EFAULT;
|
|
}
|
|
|
|
kfree(devices);
|
|
return 0;
|
|
}
|
|
|
|
static long nvm_ioctl_dev_create(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_create create;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create)))
|
|
return -EFAULT;
|
|
|
|
create.dev[DISK_NAME_LEN - 1] = '\0';
|
|
create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0';
|
|
create.tgtname[DISK_NAME_LEN - 1] = '\0';
|
|
|
|
if (create.flags != 0) {
|
|
pr_err("nvm: no flags supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return __nvm_configure_create(&create);
|
|
}
|
|
|
|
static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_remove remove;
|
|
struct nvm_dev *dev;
|
|
int ret = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove)))
|
|
return -EFAULT;
|
|
|
|
remove.tgtname[DISK_NAME_LEN - 1] = '\0';
|
|
|
|
if (remove.flags != 0) {
|
|
pr_err("nvm: no flags supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
list_for_each_entry(dev, &nvm_devices, devices) {
|
|
ret = dev->mt->remove_tgt(dev, &remove);
|
|
if (!ret)
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info)
|
|
{
|
|
info->seqnr = 1;
|
|
info->erase_cnt = 0;
|
|
info->version = 1;
|
|
}
|
|
|
|
static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init)
|
|
{
|
|
struct nvm_dev *dev;
|
|
struct nvm_sb_info info;
|
|
int ret;
|
|
|
|
down_write(&nvm_lock);
|
|
dev = nvm_find_nvm_dev(init->dev);
|
|
up_write(&nvm_lock);
|
|
if (!dev) {
|
|
pr_err("nvm: device not found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
nvm_setup_nvm_sb_info(&info);
|
|
|
|
strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN);
|
|
info.fs_ppa.ppa = -1;
|
|
|
|
if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
|
|
ret = nvm_init_sysblock(dev, &info);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info));
|
|
|
|
down_write(&nvm_lock);
|
|
dev->mt = nvm_init_mgr(dev);
|
|
up_write(&nvm_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long nvm_ioctl_dev_init(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_dev_init init;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init)))
|
|
return -EFAULT;
|
|
|
|
if (init.flags != 0) {
|
|
pr_err("nvm: no flags supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
init.dev[DISK_NAME_LEN - 1] = '\0';
|
|
|
|
return __nvm_ioctl_dev_init(&init);
|
|
}
|
|
|
|
static long nvm_ioctl_dev_factory(struct file *file, void __user *arg)
|
|
{
|
|
struct nvm_ioctl_dev_factory fact;
|
|
struct nvm_dev *dev;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory)))
|
|
return -EFAULT;
|
|
|
|
fact.dev[DISK_NAME_LEN - 1] = '\0';
|
|
|
|
if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1))
|
|
return -EINVAL;
|
|
|
|
down_write(&nvm_lock);
|
|
dev = nvm_find_nvm_dev(fact.dev);
|
|
up_write(&nvm_lock);
|
|
if (!dev) {
|
|
pr_err("nvm: device not found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
nvm_free_mgr(dev);
|
|
|
|
if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT)
|
|
return nvm_dev_factory(dev, fact.flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case NVM_INFO:
|
|
return nvm_ioctl_info(file, argp);
|
|
case NVM_GET_DEVICES:
|
|
return nvm_ioctl_get_devices(file, argp);
|
|
case NVM_DEV_CREATE:
|
|
return nvm_ioctl_dev_create(file, argp);
|
|
case NVM_DEV_REMOVE:
|
|
return nvm_ioctl_dev_remove(file, argp);
|
|
case NVM_DEV_INIT:
|
|
return nvm_ioctl_dev_init(file, argp);
|
|
case NVM_DEV_FACTORY:
|
|
return nvm_ioctl_dev_factory(file, argp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations _ctl_fops = {
|
|
.open = nonseekable_open,
|
|
.unlocked_ioctl = nvm_ctl_ioctl,
|
|
.owner = THIS_MODULE,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
static struct miscdevice _nvm_misc = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = "lightnvm",
|
|
.nodename = "lightnvm/control",
|
|
.fops = &_ctl_fops,
|
|
};
|
|
builtin_misc_device(_nvm_misc);
|