These patches implement support for Open-Channel SSDs. Applies against v4.2 and available through the lkml_v8 branch at: https://github.com/OpenChannelSSD/linux Major changes from last revision is: - The NVMe driver is no longer forced to use a non-standard way to detect LightNVM devices. It now uses PCI IDs until the identification method have been standardized. Keith, is this good with you? - The IOCTL management interface have been created. Devices can now be managed through the lightnvm-adm tool (ladm). This is available from: https://github.com/OpenChannelSSD/lightnvm-adm.git - The debugging management interface is now only available if debugging is enabled. (/sys/module/lnvm/parameters/configure_debug) Any feedback is greatly appreciated. Changes since v7: - GCC compatibility fixes (Dongsheng Yang) - Fix for BM initialization (Dongsheng Yang) - Fix for error during rrpc init (Javier Gonzalez) - Refactor NVMe driver to not expect non-standard behavior. Added PCI id identification for selected devices (qemu-nvme and cnex). - Enable NVMe metadata to be passed from target. - Create ioctl interface for management. - Add NVM_DEBUG flag to explicit enable/diskable parameter configure_debug access. The interface is only available if debugging is enabled. - Add support for physical block address commands. - Added uapi/lightnvm.h header to expose ioctl interface. - Fix qemu-nvme initialization extensions regarding L2P translation support. - Clean up of dead code. - Updated e-mails, copyrights, etc. Changes since v6: - Multipage support (Javier Gonzalez) - General code cleanups - Fixed memleak on register failure Changes since v5: Feedback from Christoph Hellwig. - Created new null_nvm from null_blk to register itself as a lightnvm device. - Changed the interface of register/unregister to only take disk_name. The gendisk alloc in nvme is kept. Most instantiations will involve the device gendisk, therefore wait with refactoring to a later time. - Renamed global parameters in core.c and rrpc.c Changes since v4: - Remove gendisk->nvm dependency - Remove device driver rq private field dependency. - Update submission and completion. The flow is now Target -> Block Manager -> Device Driver, replacing callbacks in device driver. - Abstracted out the block manager into its own module. Other block managers can now be implemented. For example to support fully host-based SSDs. - No longer exposes the device driver gendisk to user-space. - Management is moved into /sys/modules/lnvm/parameters/configure_debug Changes since v3: - Remove dependency on REQ_NVM_GC - Refactor nvme integration to use nvme_submit_sync_cmd for internal commands. - Fix race condition bug on multiple threads on RRPC target. - Rename sysfs entry under the block device from nvm to lightnvm. The configuration is found in /sys/block/*/lightnvm/ Changes since v2: Feedback from Paul Bolle: - Fix license to GPLv2, documentation, compilation. Feedback from Keith Busch: - nvme: Move lightnvm out and into nvme-lightnvm.c. - nvme: Set controller css on lightnvm command set. - nvme: Remove OACS. Feedback from Christoph Hellwig: - lightnvm: Move out of block layer into /drivers/lightnvm/core.c - lightnvm: refactor request->phys_sector into device drivers. - lightnvm: refactor prep/unprep into device drivers. - lightnvm: move nvm_dev from request_queue to gendisk. New - Bad block table support (From Javier). - Update maintainers file. Changes since v1: - Splitted LightNVM into two parts. A get/put interface for flash blocks and the respective targets that implement flash translation layer logic. - Updated the patches according to the LightNVM specification changes. - Added interface to add/remove targets for a block device. Thanks to Jens Axboe, Christoph Hellwig, Keith Busch, Paul Bolle, Javier Gonzalez and Jesper Madsen for discussions and contributions. Matias Bjørling (5): lightnvm: Support for Open-Channel SSDs lightnvm: Hybrid Open-Channel SSD block manager lightnvm: RRPC target null_nvm: LightNVM test driver nvme: LightNVM support Documentation/ioctl/ioctl-number.txt | 1 + MAINTAINERS | 8 + drivers/Kconfig | 2 + drivers/Makefile | 4 + drivers/block/Makefile | 2 +- drivers/block/nvme-core.c | 38 +- drivers/block/nvme-lightnvm.c | 607 ++++++++++++++++ drivers/lightnvm/Kconfig | 48 ++ drivers/lightnvm/Makefile | 8 + drivers/lightnvm/bm_hb.c | 372 ++++++++++ drivers/lightnvm/bm_hb.h | 46 ++ drivers/lightnvm/core.c | 832 ++++++++++++++++++++++ drivers/lightnvm/null_nvm.c | 468 ++++++++++++ drivers/lightnvm/rrpc.c | 1303 ++++++++++++++++++++++++++++++++++ drivers/lightnvm/rrpc.h | 236 ++++++ include/linux/lightnvm.h | 350 +++++++++ include/linux/nvme.h | 6 + 17 files changed, 4319 insertions(+), 12 deletions(-) create mode 100644 drivers/block/nvme-lightnvm.c create mode 100644 drivers/lightnvm/Kconfig create mode 100644 drivers/lightnvm/Makefile create mode 100644 drivers/lightnvm/bm_hb.c create mode 100644 drivers/lightnvm/bm_hb.h create mode 100644 drivers/lightnvm/core.c create mode 100644 drivers/lightnvm/null_nvm.c create mode 100644 drivers/lightnvm/rrpc.c create mode 100644 drivers/lightnvm/rrpc.h create mode 100644 include/linux/lightnvm.h -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
