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-rw-r--r--Documentation/ioctl/ioctl-number.txt1
-rw-r--r--MAINTAINERS8
-rw-r--r--drivers/Kconfig2
-rw-r--r--drivers/Makefile1
-rw-r--r--drivers/lightnvm/Kconfig28
-rw-r--r--drivers/lightnvm/Makefile5
-rw-r--r--drivers/lightnvm/core.c826
-rw-r--r--include/linux/lightnvm.h522
-rw-r--r--include/uapi/linux/lightnvm.h130
9 files changed, 1523 insertions, 0 deletions
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index df1b25e..8a44d44 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -149,6 +149,7 @@ Code Seq#(hex) Include File Comments
'K' all linux/kd.h
'L' 00-1F linux/loop.h conflict!
'L' 10-1F drivers/scsi/mpt2sas/mpt2sas_ctl.h conflict!
+'L' 20-2F linux/lightnvm.h
'L' E0-FF linux/ppdd.h encrypted disk device driver
<http://linux01.gwdg.de/~alatham/ppdd.html>
'M' all linux/soundcard.h conflict!
diff --git a/MAINTAINERS b/MAINTAINERS
index f1d5a59..d8be12c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6243,6 +6243,14 @@ F: drivers/nvdimm/pmem.c
F: include/linux/pmem.h
F: arch/*/include/asm/pmem.h
+LIGHTNVM PLATFORM SUPPORT
+M: Matias Bjorling <mb@lightnvm.io>
+W: http://github/OpenChannelSSD
+S: Maintained
+F: drivers/lightnvm/
+F: include/linux/lightnvm.h
+F: include/uapi/linux/lightnvm.h
+
LINUX FOR IBM pSERIES (RS/6000)
M: Paul Mackerras <paulus@au.ibm.com>
W: http://www.ibm.com/linux/ltc/projects/ppc
diff --git a/drivers/Kconfig b/drivers/Kconfig
index e69ec82a..3a5ab4d 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -44,6 +44,8 @@ source "drivers/net/Kconfig"
source "drivers/isdn/Kconfig"
+source "drivers/lightnvm/Kconfig"
+
# input before char - char/joystick depends on it. As does USB.
source "drivers/input/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 42f9dd5..7f1b7c5 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_NUBUS) += nubus/
obj-y += macintosh/
obj-$(CONFIG_IDE) += ide/
obj-$(CONFIG_SCSI) += scsi/
+obj-$(CONFIG_NVM) += lightnvm/
obj-y += nvme/
obj-$(CONFIG_ATA) += ata/
obj-$(CONFIG_TARGET_CORE) += target/
diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig
new file mode 100644
index 0000000..d4f309f
--- /dev/null
+++ b/drivers/lightnvm/Kconfig
@@ -0,0 +1,28 @@
+#
+# Open-Channel SSD NVM configuration
+#
+
+menuconfig NVM
+ bool "Open-Channel SSD target support"
+ depends on BLOCK
+ help
+ Say Y here to get to enable Open-channel SSDs.
+
+ Open-Channel SSDs implement a set of extension to SSDs, that
+ exposes direct access to the underlying non-volatile memory.
+
+ If you say N, all options in this submenu will be skipped and disabled
+ only do this if you know what you are doing.
+
+if NVM
+
+config NVM_DEBUG
+ bool "Open-Channel SSD debugging support"
+ ---help---
+ Exposes a debug management interface to create/remove targets at:
+
+ /sys/module/lnvm/parameters/configure_debug
+
+ It is required to create/remove targets without IOCTLs.
+
+endif # NVM
diff --git a/drivers/lightnvm/Makefile b/drivers/lightnvm/Makefile
new file mode 100644
index 0000000..38185e9
--- /dev/null
+++ b/drivers/lightnvm/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for Open-Channel SSDs.
+#
+
+obj-$(CONFIG_NVM) := core.o
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
new file mode 100644
index 0000000..f659e60
--- /dev/null
+++ b/drivers/lightnvm/core.c
@@ -0,0 +1,826 @@
+/*
+ * 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/blkdev.h>
+#include <linux/blk-mq.h>
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/sem.h>
+#include <linux/bitmap.h>
+#include <linux/module.h>
+#include <linux/miscdevice.h>
+#include <linux/lightnvm.h>
+#include <uapi/linux/lightnvm.h>
+
+static LIST_HEAD(nvm_targets);
+static LIST_HEAD(nvm_mgrs);
+static LIST_HEAD(nvm_devices);
+static DECLARE_RWSEM(nvm_lock);
+
+static struct nvm_tgt_type *nvm_find_target_type(const char *name)
+{
+ struct nvm_tgt_type *tt;
+
+ list_for_each_entry(tt, &nvm_targets, list)
+ if (!strcmp(name, tt->name))
+ return tt;
+
+ return NULL;
+}
+
+int nvm_register_target(struct nvm_tgt_type *tt)
+{
+ int ret = 0;
+
+ down_write(&nvm_lock);
+ if (nvm_find_target_type(tt->name))
+ ret = -EEXIST;
+ else
+ list_add(&tt->list, &nvm_targets);
+ up_write(&nvm_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(nvm_register_target);
+
+void nvm_unregister_target(struct nvm_tgt_type *tt)
+{
+ if (!tt)
+ return;
+
+ down_write(&nvm_lock);
+ list_del(&tt->list);
+ up_write(&nvm_lock);
+}
+EXPORT_SYMBOL(nvm_unregister_target);
+
+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->q, dev->ppalist_pool, mem_flags,
+ dma_handler);
+}
+EXPORT_SYMBOL(nvm_dev_dma_alloc);
+
+void nvm_dev_dma_free(struct nvm_dev *dev, void *ppa_list,
+ dma_addr_t dma_handler)
+{
+ dev->ops->dev_dma_free(dev->ppalist_pool, ppa_list, 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;
+}
+
+int nvm_register_mgr(struct nvmm_type *mt)
+{
+ int ret = 0;
+
+ down_write(&nvm_lock);
+ if (nvm_find_mgr_type(mt->name))
+ ret = -EEXIST;
+ else
+ list_add(&mt->list, &nvm_mgrs);
+ 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;
+}
+
+struct nvm_block *nvm_get_blk(struct nvm_dev *dev, struct nvm_lun *lun,
+ unsigned long flags)
+{
+ return dev->mt->get_blk(dev, lun, flags);
+}
+EXPORT_SYMBOL(nvm_get_blk);
+
+/* Assumes that all valid pages have already been moved on release to bm */
+void nvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
+{
+ return dev->mt->put_blk(dev, blk);
+}
+EXPORT_SYMBOL(nvm_put_blk);
+
+int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
+{
+ return dev->mt->submit_io(dev, rqd);
+}
+EXPORT_SYMBOL(nvm_submit_io);
+
+int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk)
+{
+ return dev->mt->erase_blk(dev, blk, 0);
+}
+EXPORT_SYMBOL(nvm_erase_blk);
+
+static void nvm_core_free(struct nvm_dev *dev)
+{
+ kfree(dev);
+}
+
+static int nvm_core_init(struct nvm_dev *dev)
+{
+ struct nvm_id *id = &dev->identity;
+ struct nvm_id_group *grp = &id->groups[0];
+
+ /* device values */
+ dev->nr_chnls = grp->num_ch;
+ dev->luns_per_chnl = grp->num_lun;
+ dev->pgs_per_blk = grp->num_pg;
+ dev->blks_per_lun = grp->num_blk;
+ dev->nr_planes = grp->num_pln;
+ dev->sec_size = grp->csecs;
+ dev->oob_size = grp->sos;
+ dev->sec_per_pg = grp->fpg_sz / grp->csecs;
+ dev->addr_mode = id->ppat;
+ dev->addr_format = id->ppaf;
+
+ dev->plane_mode = NVM_PLANE_SINGLE;
+ dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
+
+ if (grp->mpos & 0x020202)
+ dev->plane_mode = NVM_PLANE_DOUBLE;
+ if (grp->mpos & 0x040404)
+ dev->plane_mode = NVM_PLANE_QUAD;
+
+ /* calculated values */
+ dev->sec_per_pl = dev->sec_per_pg * dev->nr_planes;
+ dev->sec_per_blk = dev->sec_per_pl * dev->pgs_per_blk;
+ dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun;
+ dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls;
+
+ dev->total_blocks = dev->nr_planes *
+ dev->blks_per_lun *
+ dev->luns_per_chnl *
+ dev->nr_chnls;
+ dev->total_pages = dev->total_blocks * dev->pgs_per_blk;
+ INIT_LIST_HEAD(&dev->online_targets);
+
+ return 0;
+}
+
+static void nvm_free(struct nvm_dev *dev)
+{
+ if (!dev)
+ return;
+
+ if (dev->mt)
+ dev->mt->unregister_mgr(dev);
+
+ nvm_core_free(dev);
+}
+
+static int nvm_init(struct nvm_dev *dev)
+{
+ struct nvmm_type *mt;
+ int ret = 0;
+
+ if (!dev->q || !dev->ops)
+ return -EINVAL;
+
+ if (dev->ops->identity(dev->q, &dev->identity)) {
+ pr_err("nvm: device could not be identified\n");
+ ret = -EINVAL;
+ 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;
+ }
+
+ /* register with device with a supported manager */
+ list_for_each_entry(mt, &nvm_mgrs, list) {
+ ret = mt->register_mgr(dev);
+ if (ret < 0)
+ goto err; /* initialization failed */
+ if (ret > 0) {
+ dev->mt = mt;
+ break; /* successfully initialized */
+ }
+ }
+
+ if (!ret) {
+ pr_info("nvm: no compatible manager found.\n");
+ return 0;
+ }
+
+ pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n",
+ dev->name, dev->sec_per_pg, dev->nr_planes,
+ dev->pgs_per_blk, dev->blks_per_lun, dev->nr_luns,
+ dev->nr_chnls);
+ return 0;
+err:
+ nvm_free(dev);
+ pr_err("nvm: failed to initialize nvm\n");
+ return ret;
+}
+
+static void nvm_exit(struct nvm_dev *dev)
+{
+ if (dev->ppalist_pool)
+ dev->ops->destroy_dma_pool(dev->ppalist_pool);
+ nvm_free(dev);
+
+ pr_info("nvm: successfully unloaded\n");
+}
+
+int nvm_register(struct request_queue *q, char *disk_name,
+ struct nvm_dev_ops *ops)
+{
+ struct nvm_dev *dev;
+ int ret;
+
+ if (!ops->identity)
+ return -EINVAL;
+
+ dev = kzalloc(sizeof(struct nvm_dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->q = q;
+ dev->ops = ops;
+ strncpy(dev->name, disk_name, DISK_NAME_LEN);
+
+ ret = nvm_init(dev);
+ if (ret)
+ goto err_init;
+
+ down_write(&nvm_lock);
+ list_add(&dev->devices, &nvm_devices);
+ up_write(&nvm_lock);
+
+ if (dev->ops->max_phys_sect > 1) {
+ dev->ppalist_pool = dev->ops->create_dma_pool(dev->q,
+ "ppalist");
+ if (!dev->ppalist_pool) {
+ pr_err("nvm: could not create ppa pool\n");
+ return -ENOMEM;
+ }
+ } else if (dev->ops->max_phys_sect > 256) {
+ pr_info("nvm: max sectors supported is 256.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+err_init:
+ kfree(dev);
+ return ret;
+}
+EXPORT_SYMBOL(nvm_register);
+
+void nvm_unregister(char *disk_name)
+{
+ struct nvm_dev *dev = nvm_find_nvm_dev(disk_name);
+
+ if (!dev) {
+ pr_err("nvm: could not find device %s to unregister\n",
+ disk_name);
+ return;
+ }
+
+ nvm_exit(dev);
+
+ down_write(&nvm_lock);
+ list_del(&dev->devices);
+ up_write(&nvm_lock);
+}
+EXPORT_SYMBOL(nvm_unregister);
+
+static const struct block_device_operations nvm_fops = {
+ .owner = THIS_MODULE,
+};
+
+static int nvm_create_target(struct nvm_dev *dev,
+ struct nvm_ioctl_create *create)
+{
+ struct nvm_ioctl_create_simple *s = &create->conf.s;
+ struct request_queue *tqueue;
+ struct nvmm_type *mt;
+ struct gendisk *tdisk;
+ struct nvm_tgt_type *tt;
+ struct nvm_target *t;
+ void *targetdata;
+ int ret = 0;
+
+ if (!dev->mt) {
+ /* register with device with a supported NVM manager */
+ list_for_each_entry(mt, &nvm_mgrs, list) {
+ ret = mt->register_mgr(dev);
+ if (ret < 0)
+ return ret; /* initialization failed */
+ if (ret > 0) {
+ dev->mt = mt;
+ break; /* successfully initialized */
+ }
+ }
+
+ if (!ret) {
+ pr_info("nvm: no compatible nvm manager found.\n");
+ return -ENODEV;
+ }
+ }
+
+ tt = nvm_find_target_type(create->tgttype);
+ if (!tt) {
+ pr_err("nvm: target type %s not found\n", create->tgttype);
+ return -EINVAL;
+ }
+
+ down_write(&nvm_lock);
+ list_for_each_entry(t, &dev->online_targets, list) {
+ if (!strcmp(create->tgtname, t->disk->disk_name)) {
+ pr_err("nvm: target name already exists.\n");
+ up_write(&nvm_lock);
+ return -EINVAL;
+ }
+ }
+ up_write(&nvm_lock);
+
+ t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
+ if (!t)
+ return -ENOMEM;
+
+ tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
+ if (!tqueue)
+ goto err_t;
+ blk_queue_make_request(tqueue, tt->make_rq);
+
+ tdisk = alloc_disk(0);
+ if (!tdisk)
+ goto err_queue;
+
+ sprintf(tdisk->disk_name, "%s", create->tgtname);
+ tdisk->flags = GENHD_FL_EXT_DEVT;
+ tdisk->major = 0;
+ tdisk->first_minor = 0;
+ tdisk->fops = &nvm_fops;
+ tdisk->queue = tqueue;
+
+ targetdata = tt->init(dev, tdisk, s->lun_begin, s->lun_end);
+ if (IS_ERR(targetdata))
+ goto err_init;
+
+ tdisk->private_data = targetdata;
+ tqueue->queuedata = targetdata;
+
+ blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect);
+
+ set_capacity(tdisk, tt->capacity(targetdata));
+ add_disk(tdisk);
+
+ t->type = tt;
+ t->disk = tdisk;
+
+ down_write(&nvm_lock);
+ list_add_tail(&t->list, &dev->online_targets);
+ up_write(&nvm_lock);
+
+ return 0;
+err_init:
+ put_disk(tdisk);
+err_queue:
+ blk_cleanup_queue(tqueue);
+err_t:
+ kfree(t);
+ return -ENOMEM;
+}
+
+static void nvm_remove_target(struct nvm_target *t)
+{
+ struct nvm_tgt_type *tt = t->type;
+ struct gendisk *tdisk = t->disk;
+ struct request_queue *q = tdisk->queue;
+
+ lockdep_assert_held(&nvm_lock);
+
+ del_gendisk(tdisk);
+ if (tt->exit)
+ tt->exit(tdisk->private_data);
+
+ blk_cleanup_queue(q);
+
+ put_disk(tdisk);
+
+ list_del(&t->list);
+ kfree(t);
+}
+
+static int __nvm_configure_create(struct nvm_ioctl_create *create)
+{
+ struct nvm_dev *dev;
+ struct nvm_ioctl_create_simple *s;
+
+ dev = nvm_find_nvm_dev(create->dev);
+ if (!dev) {
+ pr_err("nvm: device not found\n");
+ return -EINVAL;
+ }
+
+ 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->nr_luns) {
+ pr_err("nvm: lun out of bound (%u:%u > %u)\n",
+ s->lun_begin, s->lun_end, dev->nr_luns);
+ return -EINVAL;
+ }
+
+ return nvm_create_target(dev, create);
+}
+
+static int __nvm_configure_remove(struct nvm_ioctl_remove *remove)
+{
+ struct nvm_target *t = NULL;
+ struct nvm_dev *dev;
+ int ret = -1;
+
+ down_write(&nvm_lock);
+ list_for_each_entry(dev, &nvm_devices, devices)
+ list_for_each_entry(t, &dev->online_targets, list) {
+ if (!strcmp(remove->tgtname, t->disk->disk_name)) {
+ nvm_remove_target(t);
+ ret = 0;
+ break;
+ }
+ }
+ up_write(&nvm_lock);
+
+ if (ret) {
+ pr_err("nvm: target \"%s\" doesn't exist.\n", remove->tgtname);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_NVM_DEBUG
+static int nvm_configure_show(const char *val)
+{
+ struct nvm_dev *dev;
+ char opcode, devname[DISK_NAME_LEN];
+ int ret;
+
+ ret = sscanf(val, "%c %32s", &opcode, devname);
+ if (ret != 2) {
+ pr_err("nvm: invalid command. Use \"opcode devicename\".\n");
+ return -EINVAL;
+ }
+
+ dev = nvm_find_nvm_dev(devname);
+ if (!dev) {
+ pr_err("nvm: device not found\n");
+ return -EINVAL;
+ }
+
+ if (!dev->mt)
+ return 0;
+
+ dev->mt->free_blocks_print(dev);
+
+ return 0;
+}
+
+static int nvm_configure_remove(const char *val)
+{
+ struct nvm_ioctl_remove remove;
+ char opcode;
+ int ret;
+
+ ret = sscanf(val, "%c %256s", &opcode, remove.tgtname);
+ if (ret != 2) {
+ pr_err("nvm: invalid command. Use \"d targetname\".\n");
+ return -EINVAL;
+ }
+
+ remove.flags = 0;
+
+ return __nvm_configure_remove(&remove);
+}
+
+static int nvm_configure_create(const char *val)
+{
+ struct nvm_ioctl_create create;
+ char opcode;
+ int lun_begin, lun_end, ret;
+
+ ret = sscanf(val, "%c %256s %256s %48s %u:%u", &opcode, create.dev,
+ create.tgtname, create.tgttype,
+ &lun_begin, &lun_end);
+ if (ret != 6) {
+ pr_err("nvm: invalid command. Use \"opcode device name tgttype lun_begin:lun_end\".\n");
+ return -EINVAL;
+ }
+
+ create.flags = 0;
+ create.conf.type = NVM_CONFIG_TYPE_SIMPLE;
+ create.conf.s.lun_begin = lun_begin;
+ create.conf.s.lun_end = lun_end;
+
+ return __nvm_configure_create(&create);
+}
+
+
+/* Exposes administrative interface through /sys/module/lnvm/configure_by_str */
+static int nvm_configure_by_str_event(const char *val,
+ const struct kernel_param *kp)
+{
+ char opcode;
+ int ret;
+
+ ret = sscanf(val, "%c", &opcode);
+ if (ret != 1) {
+ pr_err("nvm: string must have the format of \"cmd ...\"\n");
+ return -EINVAL;
+ }
+
+ switch (opcode) {
+ case 'a':
+ return nvm_configure_create(val);
+ case 'd':
+ return nvm_configure_remove(val);
+ case 's':
+ return nvm_configure_show(val);
+ default:
+ pr_err("nvm: invalid command\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int nvm_configure_get(char *buf, const struct kernel_param *kp)
+{
+ int sz = 0;
+ char *buf_start = buf;
+ struct nvm_dev *dev;
+
+ buf += sprintf(buf, "available devices:\n");
+ down_write(&nvm_lock);
+ list_for_each_entry(dev, &nvm_devices, devices) {
+ if (sz > 4095 - DISK_NAME_LEN)
+ break;
+ buf += sprintf(buf, " %32s\n", dev->name);
+ }
+ up_write(&nvm_lock);
+
+ return buf - buf_start - 1;
+}
+
+static const struct kernel_param_ops nvm_configure_by_str_event_param_ops = {
+ .set = nvm_configure_by_str_event,
+ .get = nvm_configure_get,
+};
+
+#undef MODULE_PARAM_PREFIX
+#define MODULE_PARAM_PREFIX "lnvm."
+
+module_param_cb(configure_debug, &nvm_configure_by_str_event_param_ops, NULL,
+ 0644);
+
+#endif /* CONFIG_NVM_DEBUG */
+
+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_targets, 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)))
+ 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)))
+ 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;
+
+ 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;
+ }
+
+ return __nvm_configure_remove(&remove);
+}
+
+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);
+ }
+ 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,
+};
+
+MODULE_ALIAS_MISCDEV(MISC_DYNAMIC_MINOR);
+
+static int __init nvm_mod_init(void)
+{
+ int ret;
+
+ ret = misc_register(&_nvm_misc);
+ if (ret)
+ pr_err("nvm: misc_register failed for control device");
+
+ return ret;
+}
+
+static void __exit nvm_mod_exit(void)
+{
+ misc_deregister(&_nvm_misc);
+}
+
+MODULE_AUTHOR("Matias Bjorling <m@bjorling.me>");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION("0.1");
+module_init(nvm_mod_init);
+module_exit(nvm_mod_exit);
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
new file mode 100644
index 0000000..122b176
--- /dev/null
+++ b/include/linux/lightnvm.h
@@ -0,0 +1,522 @@
+#ifndef NVM_H
+#define NVM_H
+
+enum {
+ NVM_IO_OK = 0,
+ NVM_IO_REQUEUE = 1,
+ NVM_IO_DONE = 2,
+ NVM_IO_ERR = 3,
+
+ NVM_IOTYPE_NONE = 0,
+ NVM_IOTYPE_GC = 1,
+};
+
+#ifdef CONFIG_NVM
+
+#include <linux/blkdev.h>
+#include <linux/types.h>
+#include <linux/file.h>
+#include <linux/dmapool.h>
+
+enum {
+ /* HW Responsibilities */
+ NVM_RSP_L2P = 1 << 0,
+ NVM_RSP_ECC = 1 << 1,
+
+ /* Physical Adressing Mode */
+ NVM_ADDRMODE_LINEAR = 0,
+ NVM_ADDRMODE_CHANNEL = 1,
+
+ /* Plane programming mode for LUN */
+ NVM_PLANE_SINGLE = 0,
+ NVM_PLANE_DOUBLE = 1,
+ NVM_PLANE_QUAD = 2,
+
+ /* Status codes */
+ NVM_RSP_SUCCESS = 0x0,
+ NVM_RSP_NOT_CHANGEABLE = 0x1,
+ NVM_RSP_ERR_FAILWRITE = 0x40ff,
+ NVM_RSP_ERR_EMPTYPAGE = 0x42ff,
+
+ /* Device opcodes */
+ NVM_OP_HBREAD = 0x02,
+ NVM_OP_HBWRITE = 0x81,
+ NVM_OP_PWRITE = 0x91,
+ NVM_OP_PREAD = 0x92,
+ NVM_OP_ERASE = 0x90,
+
+ /* PPA Command Flags */
+ NVM_IO_SNGL_ACCESS = 0x0,
+ NVM_IO_DUAL_ACCESS = 0x1,
+ NVM_IO_QUAD_ACCESS = 0x2,
+
+ NVM_IO_SUSPEND = 0x80,
+ NVM_IO_SLC_MODE = 0x100,
+ NVM_IO_SCRAMBLE_DISABLE = 0x200,
+};
+
+struct nvm_id_group {
+ u8 mtype;
+ u8 fmtype;
+ u16 res16;
+ u8 num_ch;
+ u8 num_lun;
+ u8 num_pln;
+ u16 num_blk;
+ u16 num_pg;
+ u16 fpg_sz;
+ u16 csecs;
+ u16 sos;
+ u32 trdt;
+ u32 trdm;
+ u32 tprt;
+ u32 tprm;
+ u32 tbet;
+ u32 tbem;
+ u32 mpos;
+ u16 cpar;
+ u8 res[913];
+} __packed;
+
+struct nvm_addr_format {
+ u8 ch_offset;
+ u8 ch_len;
+ u8 lun_offset;
+ u8 lun_len;
+ u8 pln_offset;
+ u8 pln_len;
+ u8 blk_offset;
+ u8 blk_len;
+ u8 pg_offset;
+ u8 pg_len;
+ u8 sect_offset;
+ u8 sect_len;
+ u8 res[4];
+};
+
+struct nvm_id {
+ u8 ver_id;
+ u8 vmnt;
+ u8 cgrps;
+ u8 res[5];
+ u32 cap;
+ u32 dom;
+ struct nvm_addr_format ppaf;
+ u8 ppat;
+ u8 resv[224];
+ struct nvm_id_group groups[4];
+} __packed;
+
+struct nvm_target {
+ struct list_head list;
+ struct nvm_tgt_type *type;
+ struct gendisk *disk;
+};
+
+struct nvm_tgt_instance {
+ struct nvm_tgt_type *tt;
+};
+
+#define ADDR_EMPTY (~0ULL)
+
+#define NVM_VERSION_MAJOR 1
+#define NVM_VERSION_MINOR 0
+#define NVM_VERSION_PATCH 0
+
+#define NVM_SEC_BITS (8)
+#define NVM_PL_BITS (6)
+#define NVM_PG_BITS (16)
+#define NVM_BLK_BITS (16)
+#define NVM_LUN_BITS (10)
+#define NVM_CH_BITS (8)
+
+struct ppa_addr {
+ union {
+ /* Channel-based PPA format in nand 4x2x2x2x8x10 */
+ struct {
+ sector_t ch : 4;
+ sector_t sec : 2; /* 4 sectors per page */
+ sector_t pl : 2; /* 4 planes per LUN */
+ sector_t lun : 2; /* 4 LUNs per channel */
+ sector_t pg : 8; /* 256 pages per block */
+ sector_t blk : 10;/* 1024 blocks per plane */
+ sector_t resved : 36;
+ } chnl;
+
+ /* Generic structure for all addresses */
+ struct {
+ sector_t sec : NVM_SEC_BITS;
+ sector_t pl : NVM_PL_BITS;
+ sector_t pg : NVM_PG_BITS;
+ sector_t blk : NVM_BLK_BITS;
+ sector_t lun : NVM_LUN_BITS;
+ sector_t ch : NVM_CH_BITS;
+ } g;
+
+ sector_t ppa;
+ };
+} __packed;
+
+struct nvm_rq {
+ struct nvm_tgt_instance *ins;
+ struct nvm_dev *dev;
+
+ struct bio *bio;
+
+ union {
+ struct ppa_addr ppa_addr;
+ dma_addr_t dma_ppa_list;
+ };
+
+ struct ppa_addr *ppa_list;
+
+ void *metadata;
+ dma_addr_t dma_metadata;
+
+ uint8_t opcode;
+ uint16_t nr_pages;
+ uint16_t flags;
+};
+
+static inline struct nvm_rq *nvm_rq_from_pdu(void *pdu)
+{
+ return pdu - sizeof(struct nvm_rq);
+}
+
+static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
+{
+ return rqdata + 1;
+}
+
+struct nvm_block;
+
+typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
+typedef int (nvm_bb_update_fn)(u32, void *, unsigned int, void *);
+typedef int (nvm_id_fn)(struct request_queue *, struct nvm_id *);
+typedef int (nvm_get_l2p_tbl_fn)(struct request_queue *, u64, u32,
+ nvm_l2p_update_fn *, void *);
+typedef int (nvm_op_bb_tbl_fn)(struct request_queue *, int, unsigned int,
+ nvm_bb_update_fn *, void *);
+typedef int (nvm_op_set_bb_fn)(struct request_queue *, struct nvm_rq *, int);
+typedef int (nvm_submit_io_fn)(struct request_queue *, struct nvm_rq *);
+typedef int (nvm_erase_blk_fn)(struct request_queue *, struct nvm_rq *);
+typedef void *(nvm_create_dma_pool_fn)(struct request_queue *, char *);
+typedef void (nvm_destroy_dma_pool_fn)(void *);
+typedef void *(nvm_dev_dma_alloc_fn)(struct request_queue *, void *, gfp_t,
+ dma_addr_t *);
+typedef void (nvm_dev_dma_free_fn)(void *, void*, dma_addr_t);
+
+struct nvm_dev_ops {
+ nvm_id_fn *identity;
+ nvm_get_l2p_tbl_fn *get_l2p_tbl;
+ nvm_op_bb_tbl_fn *get_bb_tbl;
+ nvm_op_set_bb_fn *set_bb;
+
+ nvm_submit_io_fn *submit_io;
+ nvm_erase_blk_fn *erase_block;
+
+ nvm_create_dma_pool_fn *create_dma_pool;
+ nvm_destroy_dma_pool_fn *destroy_dma_pool;
+ nvm_dev_dma_alloc_fn *dev_dma_alloc;
+ nvm_dev_dma_free_fn *dev_dma_free;
+
+ uint8_t max_phys_sect;
+};
+
+struct nvm_lun {
+ int id;
+
+ int lun_id;
+ int chnl_id;
+
+ unsigned int nr_free_blocks; /* Number of unused blocks */
+ struct nvm_block *blocks;
+
+ spinlock_t lock;
+};
+
+struct nvm_block {
+ struct list_head list;
+ struct nvm_lun *lun;
+ unsigned long id;
+
+ void *priv;
+ int type;
+};
+
+struct nvm_dev {
+ struct nvm_dev_ops *ops;
+
+ struct list_head devices;
+ struct list_head online_targets;
+
+ /* Media manager */
+ struct nvmm_type *mt;
+ void *mp;
+
+ /* Device information */
+ int nr_chnls;
+ int nr_planes;
+ int luns_per_chnl;
+ int sec_per_pg; /* only sectors for a single page */
+ int pgs_per_blk;
+ int blks_per_lun;
+ int sec_size;
+ int oob_size;
+ int addr_mode;
+ struct nvm_addr_format addr_format;
+
+ /* Calculated/Cached values. These do not reflect the actual usable
+ * blocks at run-time.
+ */
+ int max_rq_size;
+ int plane_mode; /* drive device in single, double or quad mode */
+
+ int sec_per_pl; /* all sectors across planes */
+ int sec_per_blk;
+ int sec_per_lun;
+
+ unsigned long total_pages;
+ unsigned long total_blocks;
+ int nr_luns;
+ unsigned max_pages_per_blk;
+
+ void *ppalist_pool;
+
+ struct nvm_id identity;
+
+ /* Backend device */
+ struct request_queue *q;
+ char name[DISK_NAME_LEN];
+};
+
+/* fallback conversion */
+static struct ppa_addr __generic_to_linear_addr(struct nvm_dev *dev,
+ struct ppa_addr r)
+{
+ struct ppa_addr l;
+
+ l.ppa = r.g.sec +
+ r.g.pg * dev->sec_per_pg +
+ r.g.blk * (dev->pgs_per_blk *
+ dev->sec_per_pg) +
+ r.g.lun * (dev->blks_per_lun *
+ dev->pgs_per_blk *
+ dev->sec_per_pg) +
+ r.g.ch * (dev->blks_per_lun *
+ dev->pgs_per_blk *
+ dev->luns_per_chnl *
+ dev->sec_per_pg);
+
+ return l;
+}
+
+/* fallback conversion */
+static struct ppa_addr __linear_to_generic_addr(struct nvm_dev *dev,
+ struct ppa_addr r)
+{
+ struct ppa_addr l;
+ int secs, pgs, blks, luns;
+ sector_t ppa = r.ppa;
+
+ l.ppa = 0;
+
+ div_u64_rem(ppa, dev->sec_per_pg, &secs);
+ l.g.sec = secs;
+
+ sector_div(ppa, dev->sec_per_pg);
+ div_u64_rem(ppa, dev->sec_per_blk, &pgs);
+ l.g.pg = pgs;
+
+ sector_div(ppa, dev->pgs_per_blk);
+ div_u64_rem(ppa, dev->blks_per_lun, &blks);
+ l.g.blk = blks;
+
+ sector_div(ppa, dev->blks_per_lun);
+ div_u64_rem(ppa, dev->luns_per_chnl, &luns);
+ l.g.lun = luns;
+
+ sector_div(ppa, dev->luns_per_chnl);
+ l.g.ch = ppa;
+
+ return l;
+}
+
+static struct ppa_addr __generic_to_chnl_addr(struct ppa_addr r)
+{
+ struct ppa_addr l;
+
+ l.ppa = 0;
+
+ l.chnl.sec = r.g.sec;
+ l.chnl.pl = r.g.pl;
+ l.chnl.pg = r.g.pg;
+ l.chnl.blk = r.g.blk;
+ l.chnl.lun = r.g.lun;
+ l.chnl.ch = r.g.ch;
+
+ return l;
+}
+
+static struct ppa_addr __chnl_to_generic_addr(struct ppa_addr r)
+{
+ struct ppa_addr l;
+
+ l.ppa = 0;
+
+ l.g.sec = r.chnl.sec;
+ l.g.pl = r.chnl.pl;
+ l.g.pg = r.chnl.pg;
+ l.g.blk = r.chnl.blk;
+ l.g.lun = r.chnl.lun;
+ l.g.ch = r.chnl.ch;
+
+ return l;
+}
+
+static inline struct ppa_addr addr_to_generic_mode(struct nvm_dev *dev,
+ struct ppa_addr gppa)
+{
+ switch (dev->addr_mode) {
+ case NVM_ADDRMODE_LINEAR:
+ return __linear_to_generic_addr(dev, gppa);
+ case NVM_ADDRMODE_CHANNEL:
+ return __chnl_to_generic_addr(gppa);
+ default:
+ BUG();
+ }
+ return gppa;
+}
+
+static inline struct ppa_addr generic_to_addr_mode(struct nvm_dev *dev,
+ struct ppa_addr gppa)
+{
+ switch (dev->addr_mode) {
+ case NVM_ADDRMODE_LINEAR:
+ return __generic_to_linear_addr(dev, gppa);
+ case NVM_ADDRMODE_CHANNEL:
+ return __generic_to_chnl_addr(gppa);
+ default:
+ BUG();
+ }
+ return gppa;
+}
+
+static inline int ppa_empty(struct ppa_addr ppa_addr)
+{
+ return (ppa_addr.ppa == ADDR_EMPTY);
+}
+
+static inline void ppa_set_empty(struct ppa_addr *ppa_addr)
+{
+ ppa_addr->ppa = ADDR_EMPTY;
+}
+
+static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev,
+ struct nvm_block *blk)
+{
+ struct ppa_addr ppa;
+ struct nvm_lun *lun = blk->lun;
+
+ ppa.ppa = 0;
+ ppa.g.blk = blk->id % dev->blks_per_lun;
+ ppa.g.lun = lun->lun_id;
+ ppa.g.ch = lun->chnl_id;
+
+ return ppa;
+}
+
+typedef void (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
+typedef sector_t (nvm_tgt_capacity_fn)(void *);
+typedef int (nvm_tgt_end_io_fn)(struct nvm_rq *, int);
+typedef void *(nvm_tgt_init_fn)(struct nvm_dev *, struct gendisk *, int, int);
+typedef void (nvm_tgt_exit_fn)(void *);
+
+struct nvm_tgt_type {
+ const char *name;
+ unsigned int version[3];
+
+ /* target entry points */
+ nvm_tgt_make_rq_fn *make_rq;
+ nvm_tgt_capacity_fn *capacity;
+ nvm_tgt_end_io_fn *end_io;
+
+ /* module-specific init/teardown */
+ nvm_tgt_init_fn *init;
+ nvm_tgt_exit_fn *exit;
+
+ /* For internal use */
+ struct list_head list;
+};
+
+extern int nvm_register_target(struct nvm_tgt_type *);
+extern void nvm_unregister_target(struct nvm_tgt_type *);
+
+extern void *nvm_dev_dma_alloc(struct nvm_dev *, gfp_t, dma_addr_t *);
+extern void nvm_dev_dma_free(struct nvm_dev *, void *, dma_addr_t);
+
+typedef int (nvmm_register_fn)(struct nvm_dev *);
+typedef void (nvmm_unregister_fn)(struct nvm_dev *);
+typedef struct nvm_block *(nvmm_get_blk_fn)(struct nvm_dev *,
+ struct nvm_lun *, unsigned long);
+typedef void (nvmm_put_blk_fn)(struct nvm_dev *, struct nvm_block *);
+typedef int (nvmm_open_blk_fn)(struct nvm_dev *, struct nvm_block *);
+typedef int (nvmm_close_blk_fn)(struct nvm_dev *, struct nvm_block *);
+typedef void (nvmm_flush_blk_fn)(struct nvm_dev *, struct nvm_block *);
+typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
+typedef int (nvmm_end_io_fn)(struct nvm_rq *, int);
+typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *,
+ unsigned long);
+typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
+typedef void (nvmm_free_blocks_print_fn)(struct nvm_dev *);
+
+struct nvmm_type {
+ const char *name;
+ unsigned int version[3];
+
+ nvmm_register_fn *register_mgr;
+ nvmm_unregister_fn *unregister_mgr;
+
+ /* Block administration callbacks */
+ nvmm_get_blk_fn *get_blk;
+ nvmm_put_blk_fn *put_blk;
+ nvmm_open_blk_fn *open_blk;
+ nvmm_close_blk_fn *close_blk;
+ nvmm_flush_blk_fn *flush_blk;
+
+ nvmm_submit_io_fn *submit_io;
+ nvmm_end_io_fn *end_io;
+ nvmm_erase_blk_fn *erase_blk;
+
+ /* Configuration management */
+ nvmm_get_lun_fn *get_lun;
+
+ /* Statistics */
+ nvmm_free_blocks_print_fn *free_blocks_print;
+ struct list_head list;
+};
+
+extern int nvm_register_mgr(struct nvmm_type *);
+extern void nvm_unregister_mgr(struct nvmm_type *);
+
+extern struct nvm_block *nvm_get_blk(struct nvm_dev *, struct nvm_lun *,
+ unsigned long);
+extern void nvm_put_blk(struct nvm_dev *, struct nvm_block *);
+
+extern int nvm_register(struct request_queue *, char *,
+ struct nvm_dev_ops *);
+extern void nvm_unregister(char *);
+
+extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *);
+extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);
+#else /* CONFIG_NVM */
+struct nvm_dev_ops;
+
+static inline int nvm_register(struct request_queue *q, char *disk_name,
+ struct nvm_dev_ops *ops)
+{
+ return -EINVAL;
+}
+static inline void nvm_unregister(char *disk_name) {}
+#endif /* CONFIG_NVM */
+#endif /* LIGHTNVM.H */
diff --git a/include/uapi/linux/lightnvm.h b/include/uapi/linux/lightnvm.h
new file mode 100644
index 0000000..928f989
--- /dev/null
+++ b/include/uapi/linux/lightnvm.h
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2015 CNEX Labs. All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef _UAPI_LINUX_LIGHTNVM_H
+#define _UAPI_LINUX_LIGHTNVM_H
+
+#ifdef __KERNEL__
+#include <linux/kernel.h>
+#include <linux/ioctl.h>
+#else /* __KERNEL__ */
+#include <stdio.h>
+#include <sys/ioctl.h>
+#define DISK_NAME_LEN 32
+#endif /* __KERNEL__ */
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+#define NVM_TTYPE_NAME_MAX 48
+#define NVM_TTYPE_MAX 63
+
+#define NVM_CTRL_FILE "/dev/lightnvm/control"
+
+struct nvm_ioctl_info_tgt {
+ __u32 version[3];
+ __u32 reserved;
+ char tgtname[NVM_TTYPE_NAME_MAX];
+};
+
+struct nvm_ioctl_info {
+ __u32 version[3]; /* in/out - major, minor, patch */
+ __u16 tgtsize; /* number of targets */
+ __u16 reserved16; /* pad to 4K page */
+ __u32 reserved[12];
+ struct nvm_ioctl_info_tgt tgts[NVM_TTYPE_MAX];
+};
+
+enum {
+ NVM_DEVICE_ACTIVE = 1 << 0,
+};
+
+struct nvm_ioctl_device_info {
+ char devname[DISK_NAME_LEN];
+ char bmname[NVM_TTYPE_NAME_MAX];
+ __u32 bmversion[3];
+ __u32 flags;
+ __u32 reserved[8];
+};
+
+struct nvm_ioctl_get_devices {
+ __u32 nr_devices;
+ __u32 reserved[31];
+ struct nvm_ioctl_device_info info[31];
+};
+
+struct nvm_ioctl_create_simple {
+ __u32 lun_begin;
+ __u32 lun_end;
+};
+
+enum {
+ NVM_CONFIG_TYPE_SIMPLE = 0,
+};
+
+struct nvm_ioctl_create_conf {
+ __u32 type;
+ union {
+ struct nvm_ioctl_create_simple s;
+ };
+};
+
+struct nvm_ioctl_create {
+ char dev[DISK_NAME_LEN]; /* open-channel SSD device */
+ char tgttype[NVM_TTYPE_NAME_MAX]; /* target type name */
+ char tgtname[DISK_NAME_LEN]; /* dev to expose target as */
+
+ __u32 flags;
+
+ struct nvm_ioctl_create_conf conf;
+};
+
+struct nvm_ioctl_remove {
+ char tgtname[DISK_NAME_LEN];
+
+ __u32 flags;
+};
+
+
+/* The ioctl type, 'L', 0x20 - 0x2F documented in ioctl-number.txt */
+enum {
+ /* top level cmds */
+ NVM_INFO_CMD = 0x20,
+ NVM_GET_DEVICES_CMD,
+
+ /* device level cmds */
+ NVM_DEV_CREATE_CMD,
+ NVM_DEV_REMOVE_CMD,
+};
+
+#define NVM_IOCTL 'L' /* 0x4c */
+
+#define NVM_INFO _IOWR(NVM_IOCTL, NVM_INFO_CMD, \
+ struct nvm_ioctl_info)
+#define NVM_GET_DEVICES _IOR(NVM_IOCTL, NVM_GET_DEVICES_CMD, \
+ struct nvm_ioctl_get_devices)
+#define NVM_DEV_CREATE _IOW(NVM_IOCTL, NVM_DEV_CREATE_CMD, \
+ struct nvm_ioctl_create)
+#define NVM_DEV_REMOVE _IOW(NVM_IOCTL, NVM_DEV_REMOVE_CMD, \
+ struct nvm_ioctl_remove)
+
+#define NVM_VERSION_MAJOR 1
+#define NVM_VERSION_MINOR 0
+#define NVM_VERSION_PATCHLEVEL 0
+
+#endif
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