#include <asm/unaligned.h>
#include "nvme.h"
+#include "fabrics.h"
#define NVME_MINORS (1U << MINORBITS)
module_param(shutdown_timeout, byte, 0644);
MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown");
-static int nvme_major;
-module_param(nvme_major, int, 0);
+unsigned int nvme_max_retries = 5;
+module_param_named(max_retries, nvme_max_retries, uint, 0644);
+MODULE_PARM_DESC(max_retries, "max number of retries a command may have");
+EXPORT_SYMBOL_GPL(nvme_max_retries);
static int nvme_char_major;
module_param(nvme_char_major, int, 0);
switch (old_state) {
case NVME_CTRL_NEW:
case NVME_CTRL_RESETTING:
+ case NVME_CTRL_RECONNECTING:
changed = true;
/* FALLTHRU */
default:
case NVME_CTRL_RESETTING:
switch (old_state) {
case NVME_CTRL_NEW:
+ case NVME_CTRL_LIVE:
+ case NVME_CTRL_RECONNECTING:
+ changed = true;
+ /* FALLTHRU */
+ default:
+ break;
+ }
+ break;
+ case NVME_CTRL_RECONNECTING:
+ switch (old_state) {
case NVME_CTRL_LIVE:
changed = true;
/* FALLTHRU */
switch (old_state) {
case NVME_CTRL_LIVE:
case NVME_CTRL_RESETTING:
+ case NVME_CTRL_RECONNECTING:
changed = true;
/* FALLTHRU */
default:
req->cmd_type = REQ_TYPE_DRV_PRIV;
req->cmd_flags |= REQ_FAILFAST_DRIVER;
- req->__data_len = 0;
- req->__sector = (sector_t) -1;
- req->bio = req->biotail = NULL;
-
req->cmd = (unsigned char *)cmd;
req->cmd_len = sizeof(struct nvme_command);
result, timeout);
}
+static void nvme_keep_alive_end_io(struct request *rq, int error)
+{
+ struct nvme_ctrl *ctrl = rq->end_io_data;
+
+ blk_mq_free_request(rq);
+
+ if (error) {
+ dev_err(ctrl->device,
+ "failed nvme_keep_alive_end_io error=%d\n", error);
+ return;
+ }
+
+ schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ);
+}
+
+static int nvme_keep_alive(struct nvme_ctrl *ctrl)
+{
+ struct nvme_command c;
+ struct request *rq;
+
+ memset(&c, 0, sizeof(c));
+ c.common.opcode = nvme_admin_keep_alive;
+
+ rq = nvme_alloc_request(ctrl->admin_q, &c, BLK_MQ_REQ_RESERVED,
+ NVME_QID_ANY);
+ if (IS_ERR(rq))
+ return PTR_ERR(rq);
+
+ rq->timeout = ctrl->kato * HZ;
+ rq->end_io_data = ctrl;
+
+ blk_execute_rq_nowait(rq->q, NULL, rq, 0, nvme_keep_alive_end_io);
+
+ return 0;
+}
+
+static void nvme_keep_alive_work(struct work_struct *work)
+{
+ struct nvme_ctrl *ctrl = container_of(to_delayed_work(work),
+ struct nvme_ctrl, ka_work);
+
+ if (nvme_keep_alive(ctrl)) {
+ /* allocation failure, reset the controller */
+ dev_err(ctrl->device, "keep-alive failed\n");
+ ctrl->ops->reset_ctrl(ctrl);
+ return;
+ }
+}
+
+void nvme_start_keep_alive(struct nvme_ctrl *ctrl)
+{
+ if (unlikely(ctrl->kato == 0))
+ return;
+
+ INIT_DELAYED_WORK(&ctrl->ka_work, nvme_keep_alive_work);
+ schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ);
+}
+EXPORT_SYMBOL_GPL(nvme_start_keep_alive);
+
+void nvme_stop_keep_alive(struct nvme_ctrl *ctrl)
+{
+ if (unlikely(ctrl->kato == 0))
+ return;
+
+ cancel_delayed_work_sync(&ctrl->ka_work);
+}
+EXPORT_SYMBOL_GPL(nvme_stop_keep_alive);
+
int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id)
{
struct nvme_command c = { };
memset(&c, 0, sizeof(c));
c.features.opcode = nvme_admin_get_features;
c.features.nsid = cpu_to_le32(nsid);
- c.features.prp1 = cpu_to_le64(dma_addr);
+ c.features.dptr.prp1 = cpu_to_le64(dma_addr);
c.features.fid = cpu_to_le32(fid);
ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &cqe, NULL, 0, 0,
memset(&c, 0, sizeof(c));
c.features.opcode = nvme_admin_set_features;
- c.features.prp1 = cpu_to_le64(dma_addr);
+ c.features.dptr.prp1 = cpu_to_le64(dma_addr);
c.features.fid = cpu_to_le32(fid);
c.features.dword11 = cpu_to_le32(dword11);
ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config);
if (ret)
return ret;
+
+ /* Checking for ctrl->tagset is a trick to avoid sleeping on module
+ * load, since we only need the quirk on reset_controller. Notice
+ * that the HGST device needs this delay only in firmware activation
+ * procedure; unfortunately we have no (easy) way to verify this.
+ */
+ if ((ctrl->quirks & NVME_QUIRK_DELAY_BEFORE_CHK_RDY) && ctrl->tagset)
+ msleep(NVME_QUIRK_DELAY_AMOUNT);
+
return nvme_wait_ready(ctrl, cap, false);
}
EXPORT_SYMBOL_GPL(nvme_disable_ctrl);
}
nvme_set_queue_limits(ctrl, ctrl->admin_q);
+ ctrl->sgls = le32_to_cpu(id->sgls);
+ ctrl->kas = le16_to_cpu(id->kas);
+
+ if (ctrl->ops->is_fabrics) {
+ ctrl->icdoff = le16_to_cpu(id->icdoff);
+ ctrl->ioccsz = le32_to_cpu(id->ioccsz);
+ ctrl->iorcsz = le32_to_cpu(id->iorcsz);
+ ctrl->maxcmd = le16_to_cpu(id->maxcmd);
+
+ /*
+ * In fabrics we need to verify the cntlid matches the
+ * admin connect
+ */
+ if (ctrl->cntlid != le16_to_cpu(id->cntlid))
+ ret = -EINVAL;
+
+ if (!ctrl->opts->discovery_nqn && !ctrl->kas) {
+ dev_err(ctrl->dev,
+ "keep-alive support is mandatory for fabrics\n");
+ ret = -EINVAL;
+ }
+ } else {
+ ctrl->cntlid = le16_to_cpu(id->cntlid);
+ }
kfree(id);
- return 0;
+ return ret;
}
EXPORT_SYMBOL_GPL(nvme_init_identify);
blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift);
nvme_set_queue_limits(ctrl, ns->queue);
- disk->major = nvme_major;
- disk->first_minor = 0;
disk->fops = &nvme_fops;
disk->private_data = ns;
disk->queue = ns->queue;
- disk->driverfs_dev = ctrl->device;
disk->flags = GENHD_FL_EXT_DEVT;
sprintf(disk->disk_name, "nvme%dn%d", ctrl->instance, ns->instance);
if (ns->type == NVME_NS_LIGHTNVM)
return;
- add_disk(ns->disk);
+ device_add_disk(ctrl->device, ns->disk);
if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
&nvme_ns_attr_group))
pr_warn("%s: failed to create sysfs group for identification\n",
{
int result;
- result = register_blkdev(nvme_major, "nvme");
- if (result < 0)
- return result;
- else if (result > 0)
- nvme_major = result;
-
result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme",
&nvme_dev_fops);
if (result < 0)
- goto unregister_blkdev;
+ return result;
else if (result > 0)
nvme_char_major = result;
unregister_chrdev:
__unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme");
- unregister_blkdev:
- unregister_blkdev(nvme_major, "nvme");
return result;
}
{
class_destroy(nvme_class);
__unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme");
- unregister_blkdev(nvme_major, "nvme");
}
MODULE_LICENSE("GPL");
projects / karo-tx-linux.git / blobdiff