Commit 0017ba8b authored by Ben Walker's avatar Ben Walker
Browse files

CHANGELOG: Update nvme section 



Change-Id: I4fc9e597281323baf8f03f5977db264efff77fbb
Signed-off-by: default avatarBen Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/452688


Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Reviewed-by: default avatarDarek Stojaczyk <dariusz.stojaczyk@intel.com>
Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
parent ae628a84

CHANGELOG.md

+24 −20
Original line number Diff line number Diff line
@@ -5,25 +5,36 @@ 
### nvme



Added asynchronous probe support. New APIs spdk_nvme_probe_async(),

spdk_nvme_connect_async() and spdk_nvme_probe_poll_async() were added to

enable this feature, spdk_nvme_probe_async() and spdk_nvme_connect_async()

return a context associated with the specified controllers.  Users then call

spdk_nvme_connect_async() and spdk_nvme_probe_poll_async() were added to enable

this feature. spdk_nvme_probe_async() and spdk_nvme_connect_async() return a

context associated with the specified controllers. Users then call

spdk_nvme_probe_poll_async() until it returns 0, indicating that the operation

is completed with success.

completed.



A new qpair creation option, delay_pcie_doorbell, was added. This can be passed

to spdk_nvme_alloc_io_qpair(). This makes the I/O submission functions,

such as spdk_nvme_ns_writev(), skip ringing the submission queue doorbell.

Instead the doorbell will be rung as necessary inside

spdk_nvme_qpair_process_completions(). This can result in significantly fewer

MMIO writes to the doorbell register under heavy load, greatly improving

performance.

to spdk_nvme_alloc_io_qpair(). This makes the I/O submission functions, such as

spdk_nvme_ns_writev(), skip ringing the submission queue doorbell. Instead the

doorbell will be rung as necessary inside spdk_nvme_qpair_process_completions().

This can result in significantly fewer MMIO writes to the doorbell register

under heavy load, greatly improving performance.



New API spdk_nvme_ctrlr_get_flags() was added.

spdk_nvme_ctrlr_get_regs_cmbsz() was added to report the size of the controller

memory buffer, if available.



NVMe hotplug poller is now able to detach devices hotremoved from the system

spdk_nvme_ctrlr_get_flags() was added to return controller feature

flags. Two flags are currently tracked:

SPDK_NVME_CTRLR_SGL_SUPPORTED

SPDK_NVME_CTRLR_SECURITY_SEND_RECV_SUPPORTED



The NVMe hotplug poller is now able to detach devices hot-removed from the system

via `/sys/bus/pci/devices/<bdf>/remove` and `/sys/bus/pci/devices/<bdf>/driver/unbind`.



Opal support was added for scan, take ownership, revert TPer, and dumping device

info. The nvme_manage tool can be used to perform these operations. The public

API functions are spdk_nvme_ctrlr_security_receive() and

spdk_nvme_ctrlr_security_send(). This module should be considered experimental

pending additional features and tests.



### raid



Added new strip_size_kb rpc param on create to replace the more ambiguous
@@ -95,13 +106,6 @@ New `get_spdk_version` RPC method is introduced to get version info of the runni 
The `start_nbd_disk` RPC method now take nbd_device as an optional parameter. If nbd_device

is specified, use that specified nbd device. If it's not specified, pick available one.



### Opal



Add Opal scan support for NVMe to check whether it supports SED Opal and dump

device info. Add Opal take ownership command support, revert TPer command support.

nvme_manage tool can be used to invoke this.

This module should be considered experimental pending additional features and tests.



### iSCSI target



DIF strip and insert is now supported. DIF settings are not exposed to the iSCSI initiator.