These patches implement support for Open-Channel SSDs. Applies against axboe's linux-block/for-4.3/drivers and can be found in the lkml_v7 branch at https://github.com/OpenChannelSSD/linux Any feedback is greatly appreciated. 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 RRPC target lightnvm: Hybrid Open-Channel SSD block manager null_nvm: Lightnvm test driver nvme: LightNVM support MAINTAINERS | 8 + drivers/Kconfig | 2 + drivers/Makefile | 5 + drivers/block/Makefile | 2 +- drivers/block/nvme-core.c | 23 +- drivers/block/nvme-lightnvm.c | 568 ++++++++++++++++++ drivers/lightnvm/Kconfig | 36 ++ drivers/lightnvm/Makefile | 8 + drivers/lightnvm/bm_hb.c | 366 ++++++++++++ drivers/lightnvm/bm_hb.h | 46 ++ drivers/lightnvm/core.c | 591 +++++++++++++++++++ drivers/lightnvm/null_nvm.c | 481 +++++++++++++++ drivers/lightnvm/rrpc.c | 1296 +++++++++++++++++++++++++++++++++++++++++ drivers/lightnvm/rrpc.h | 236 ++++++++ include/linux/lightnvm.h | 334 +++++++++++ include/linux/nvme.h | 6 + include/uapi/linux/nvme.h | 3 + 17 files changed, 4007 insertions(+), 4 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
