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* drivers:block: cpqarray clean upValentin Rothberg2016-03-151-1/+0
| | | | | | | | | | Commit d436641439e0 ("cpqarray: remove it from the kernel") removes the Kconfig option BLK_CPQ_DA and cpqarray. Remove the dead build rule in the Makefile. Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
* nvme: move to a new drivers/nvme/host directoryJay Sternberg2015-10-091-2/+0
| | | | | | | | | | | | | | This patch moves the NVMe driver from drivers/block/ to its own new drivers/nvme/host/ directory. This is in preparation of splitting the current monolithic driver up and add support for the upcoming NVMe over Fabrics standard. The drivers/nvme/host/ is chose to leave space for a NVMe target implementation in addition to this host side driver. Signed-off-by: Jay Sternberg <jay.e.sternberg@intel.com> [hch: rebased, renamed core.c to pci.c, slight tweaks] Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
* libnvdimm, pmem: move pmem to drivers/nvdimm/Dan Williams2015-06-251-1/+0
| | | | | | | | | Prepare the pmem driver to consume PMEM namespaces emitted by regions of an nvdimm_bus instance. No functional change. Acked-by: Christoph Hellwig <hch@lst.de> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* drivers/block/pmem: Add a driver for persistent memoryRoss Zwisler2015-04-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PMEM is a new driver that presents a reserved range of memory as a block device. This is useful for developing with NV-DIMMs, and can be used with volatile memory as a development platform. This patch contains the initial driver from Ross Zwisler, with various changes: converted it to use a platform_device for discovery, fixed partition support and merged various patches from Boaz Harrosh. Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Dan Williams <dan.j.williams@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Boaz Harrosh <boaz@plexistor.com> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jens Axboe <axboe@fb.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Keith Busch <keith.busch@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-nvdimm@ml01.01.org Link: http://lkml.kernel.org/r/1427872339-6688-3-git-send-email-hch@lst.de [ Minor cleanups. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
* zram: promote zram from stagingMinchan Kim2014-01-311-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Zram has lived in staging for a LONG LONG time and have been fixed/improved by many contributors so code is clean and stable now. Of course, there are lots of product using zram in real practice. The major TV companys have used zram as swap since two years ago and recently our production team released android smart phone with zram which is used as swap, too and recently Android Kitkat start to use zram for small memory smart phone. And there was a report Google released their ChromeOS with zram, too and cyanogenmod have been used zram long time ago. And I heard some disto have used zram block device for tmpfs. In addition, I saw many report from many other peoples. For example, Lubuntu start to use it. The benefit of zram is very clear. With my experience, one of the benefit was to remove jitter of video application with backgroud memory pressure. It would be effect of efficient memory usage by compression but more issue is whether swap is there or not in the system. Recent mobile platforms have used JAVA so there are many anonymous pages. But embedded system normally are reluctant to use eMMC or SDCard as swap because there is wear-leveling and latency issues so if we do not use swap, it means we can't reclaim anoymous pages and at last, we could encounter OOM kill. :( Although we have real storage as swap, it was a problem, too. Because it sometime ends up making system very unresponsible caused by slow swap storage performance. Quote from Luigi on Google "Since Chrome OS was mentioned: the main reason why we don't use swap to a disk (rotating or SSD) is because it doesn't degrade gracefully and leads to a bad interactive experience. Generally we prefer to manage RAM at a higher level, by transparently killing and restarting processes. But we noticed that zram is fast enough to be competitive with the latter, and it lets us make more efficient use of the available RAM. " and he announced. http://www.spinics.net/lists/linux-mm/msg57717.html Other uses case is to use zram for block device. Zram is block device so anyone can format the block device and mount on it so some guys on the internet start zram as /var/tmp. http://forums.gentoo.org/viewtopic-t-838198-start-0.html Let's promote zram and enhance/maintain it instead of removing. Signed-off-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: Nitin Gupta <ngupta@vflare.org> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Bob Liu <bob.liu@oracle.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hugh Dickins <hughd@google.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Luigi Semenzato <semenzato@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Seth Jennings <sjenning@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'master' into for-nextJiri Kosina2013-12-191-0/+3
|\ | | | | | | | | | | | | Sync with Linus' tree to be able to apply fixes on top of newer things in tree (efi-stub). Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * Merge branch 'for-3.13/drivers' of git://git.kernel.dk/linux-blockLinus Torvalds2013-11-141-0/+2
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull block driver updates from Jens Axboe: "This is the block driver pull request for 3.13. As with the core pull request just sent out, this was rebased on top of the core branch again after the immutable series was pulled. This also means that bcache gets to sit the initial pull over. I will send a second driver pull request in the merge window to get those fixes in, once they have been rebased and tested on top of the non-immutable stack. This pull request contains: - Add support for the sTec Kronos pci-e flash card from sTec. Also has various cleanups for this driver, from myself, Bart, Mike Snizter, and Wei Yongjun. - Add surprise removal support for the micron mtip32xx driver from Micron. - Floppy documentation fix from Ben Harris. - debugfs bug fix for pktcdvd from Dan Carpenter. - Fix for the mtip32xx driver stack usage in the debugfs path, dynamically allocating those buffers instead. From David Milburn. - Disable cpqarray in Kconfig. The plan is to remove it on request of HP, but lets disable it for a few revisions just to see if anyone yells. - drbd fixes from Lars Ellenberg and Philipp Reisner. - Elevator switch fix for the s390 block driver from Heiko Carstens. - loop crash fix on IO to unassigned device from Mikulas Patocka. - A series of bug fixes for the IBM rsxx pci-e flash driver from Philip J Kelleher. - cciss probe fix from Stephen Cameron. - Xen block front/back fixes from Roger Pau Monne and Vegard Nossum" * 'for-3.13/drivers' of git://git.kernel.dk/linux-block: (41 commits) floppy: Correct documentation of driver options when used as a module. pktcdvd: debugfs functions return NULL on error xen-blkfront: restore the non-persistent data path skd: fix formatting in skd_s1120.h skd: reorder construct/destruct code skd: cleanup skd_do_inq_page_da() skd: remove SKD_OMIT_FROM_SRC_DIST ifdefs skd: remove redundant skdev->pdev assignment from skd_pci_probe() skd: use <asm/unaligned.h> skd: remove SCSI subsystem specific includes skd: register block device only if some devices are present skd: fix error messages in skd_init() skd: fix error paths in skd_init() skd: fix unregister_blkdev() placement skd: more removal of bio-based code skd: cleanup the skd_*() function block wrapping skd: rip out bio path skd: fix error return code in skd_pci_probe() s390/dasd: hold request queue sysfs lock when calling elevator_init() cciss: return 0 from driver probe function on success, not 1 ...
| | * Add support for sTec's pci-e flash card KronosAkhil Bhansali2013-11-081-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Akhil Bhansali <abhansali@stec-inc.com> Signed-off-by: Ramprasad Chinthekindi <rchinthekindi@stec-inc.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Folded patch, contributions to clean up this driver from: Jens Axboe Dan Carpenter Andrew Morton Signed-off-by: Jens Axboe <axboe@kernel.dk>
| * | null_blk: multi queue aware block test driverJens Axboe2013-10-251-0/+1
| |/ | | | | | | | | | | | | | | | | A driver that simply completes IO it receives, it does no transfers. Written to fascilitate testing of the blk-mq code. It supports various module options to use either bio queueing, rq queueing, or mq mode. Signed-off-by: Jens Axboe <axboe@kernel.dk>
* / vio: remove dangly makefile bitsAlan2013-12-031-1/+0
|/ | | | | | | | The drivers are long gone but some config escaped the prune Signed-off-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk> Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=57221 Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* NVMe: Add nvme-scsi.cVishal Verma2013-03-281-1/+1
| | | | | | | | Translates SCSI commands in SG_IO ioctl to NVMe commands. Uses the scsi-nvme translation spec from nvmexpress.org as reference. Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
* NVMe: Rename nvme.c to nvme-core.cVishal Verma2013-03-261-0/+1
| | | | | | | | In preparation for adding nvme-scsi.c It is preferable to retain the module name 'nvme' Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
* Merge branch 'delete-xt-disk' of ↵Jens Axboe2013-02-141-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux into for-3.9/drivers Paul writes: Please pull the following to get the removal of the original IBM PC-XT hard disk driver from the block layer (drivers/block/xd.c). As near as I can tell, it hasn't seen a run time fix in over a dozen years, and with drive sizes of 10-20MB, and performance of about 128kB/s maximum, it is no surprise that it has been completely unused for well over a decade. The removal was originally posted[1] well over a month ago, and since then, there has been nobody objecting to the removal, aside from someone who had mistakenly confused it with a completely different driver (hd.c)
| * block: delete super ancient PC-XT driver for 1980's hardwarePaul Gortmaker2013-01-051-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This driver was for the 8 bit ISA cards that were installed in the PC-XT machines of 1980 vintage. They supported the dual ribbon cable MFM drives of 10-20MB capacity, and ran at a 3:1 interleave, giving performance on the order of 128kB/s. By the introduction of the PC-AT (286) these controllers were already scrapped in favour of 16 bit controllers with some onboard RAM that could support a 1:1 interleave. The git history doesn't show any evidence of runtime fixes that would reflect active usage; instead just the usual tree-wide API type changes/cleanups. Going back to in-source changelogs, the last "runtime" fix that is evident is something I did over a dozen years ago[1] -- and even back then, the hardware was long since unavailable, so that ancient fix was also not runtime tested. The time is long overdue for this to get flushed, so lets get rid of it before anyone wastes more time doing builds and sparse checks etc. on long since dead code. [1] http://lkml.indiana.edu/hypermail/linux/kernel/0102.2/0027.html Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* | block: IBM RamSan 70/80 device driverjosh.h.morris@us.ibm.com2013-02-051-0/+2
|/ | | | | | | | | | This patch includes the device driver for the IBM RamSan family of PCI SSD flash storage cards. This driver will include support for the RamSan 70 and 80. The driver presents a block device for device I/O. Signed-off-by: Philip J Kelleher <pjk1939@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* block: remove the deprecated ub driverCong Wang2012-09-061-1/+0
| | | | | | | | | | It was scheduled to be removed in 3.6. Acked-by: Pete Zaitcev <zaitcev@redhat.com> Cc: Jens Axboe <jaxboe@fusionio.com> Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge git://git.infradead.org/users/willy/linux-nvmeLinus Torvalds2012-01-181-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.infradead.org/users/willy/linux-nvme: (105 commits) NVMe: Set number of queues correctly NVMe: Version 0.8 NVMe: Set queue flags correctly NVMe: Simplify nvme_unmap_user_pages NVMe: Mark the end of the sg list NVMe: Fix DMA mapping for admin commands NVMe: Rename IO_TIMEOUT to NVME_IO_TIMEOUT NVMe: Merge the nvme_bio and nvme_prp data structures NVMe: Change nvme_completion_fn to take a dev NVMe: Change get_nvmeq to take a dev instead of a namespace NVMe: Simplify completion handling NVMe: Update Identify Controller data structure NVMe: Implement doorbell stride capability NVMe: Version 0.7 NVMe: Don't probe namespace 0 Fix calculation of number of pages in a PRP List NVMe: Create nvme_identify and nvme_get_features functions NVMe: Fix memory leak in nvme_dev_add() NVMe: Fix calls to dma_unmap_sg NVMe: Correct sg list setup in nvme_map_user_pages ...
| * NVMe: New driverMatthew Wilcox2011-11-041-0/+1
| | | | | | | | | | | | This driver is for devices that follow the NVM Express standard Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
* | block: Add driver for Micron RealSSD pcie flash cardsSam Bradshaw2011-11-051-0/+1
|/ | | | | | | | | This adds mtip32xx, a driver supporting Microns line of pci-express flash storage cards. Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com> Signed-off-by: Sam Bradshaw <sbradshaw@micron.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* xen/blkback: Move it from drivers/xen to drivers/blockKonrad Rzeszutek Wilk2011-04-181-0/+1
| | | | | | .. and modify the Makefile and Kconfig files appropriately. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* drivers/block/Makefile: replace the use of <module>-objs with <module>-yTracey Dent2011-01-191-1/+1
| | | | | | | | | | Change Makefile to use <modules>-y instead of <modules>-objs because -objs is deprecated and should now be switched. According to (documentation/kbuild/makefiles.txt). Signed-off-by: Tracey Dent <tdent48227@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
* rbd: introduce rados block device (rbd), based on libcephYehuda Sadeh2010-10-211-0/+1
| | | | | | | | | | | | The rados block device (rbd), based on osdblk, creates a block device that is backed by objects stored in the Ceph distributed object storage cluster. Each device consists of a single metadata object and data striped over many data objects. The rbd driver supports read-only snapshots. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* The DRBD driverPhilipp Reisner2009-10-011-0/+1
| | | | | Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
* osdblk: a Linux block device for OSD objectsJeff Garzik2009-06-241-0/+1
| | | | | | | | | | | | | | | | | | Submitted driver exports a block device of the form /dev/osdblkX, where X is a decimal number. It does that by mounting a stacking block device on top of an osd object. For example, if you create a 2G object on an OSD device, you can then use this module to present that 2G object as a Linux block device. See inside patch for exact documentation. [Sitting at linux-next helped fix proper Kconfig dependency for this driver, thanks to Randy Dunlap] Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
* mflash: initial supportunsik Kim2009-04-071-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This driver supports mflash IO mode for linux. Mflash is embedded flash drive and mainly targeted mobile and consumer electronic devices. Internally, mflash has nand flash and other hardware logics and supports 2 different operation (ATA, IO) modes. ATA mode doesn't need any new driver and currently works well under standard IDE subsystem. Actually it's one chip SSD. IO mode is ATA-like custom mode for the host that doesn't have IDE interface. Followings are brief descriptions about IO mode. A. IO mode based on ATA protocol and uses some custom command. (read confirm, write confirm) B. IO mode uses SRAM bus interface. C. IO mode supports 4kB boot area, so host can boot from mflash. This driver is quitely similar to a standard ATA driver, but because of following reasons it is currently seperated with ATA layer. 1. ATA layer deals standard ATA protocol. ATA layer have many low- level device specific interface, but data transfer keeps ATA rule. But, mflash IO mode doesn't. 2. Even though currently not used in mflash driver code, mflash has some custom command and modes. (nand fusing, firmware patch, etc) If this feature supported in linux kernel, ATA layer more altered. 3. Currently PATA platform device driver doesn't support interrupt. (I'm not sure) But, mflash uses interrupt (polling mode is just for debug). 4. mflash is somewhat under-develop product. Even though some company already using mflash their own product, I think more time is needed for standardization of custom command and mode. That time (maybe October) I will talk to with ATA people. If they accept integration, I will integrate. Signed-off-by: unsik Kim <donari75@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* m68k: mac - Add SWIM floppy supportLaurent Vivier2009-03-261-0/+3
| | | | | | | | It allows to read data from a floppy, but not to write to, and to eject the floppy (useful on our Mac without eject button). Signed-off-by: Laurent Vivier <Laurent@lvivier.info> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* ps3/block: Replace mtd/ps3vram by block/ps3vramGeert Uytterhoeven2009-03-131-0/+1
| | | | | | | | | | | | | | | Convert the PS3 Video RAM Storage Driver from an MTD driver to a plain block device driver. The ps3vram driver exposes unused video RAM on the PS3 as a block device suitable for storage or swap. Fast data transfer is achieved using a local cache in system RAM and DMA transfers via the GPU. The new driver is ca. 50% faster for reading, and ca. 10% for writing. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* move ide/legacy/hd.c to drivers/block/Adrian Bunk2008-07-161-0/+1
| | | | | | | | | This patch moves hd.c to drivers/block/ Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: rmk@arm.linux.org.uk Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* The ps2esdi driver was marked as BROKEN more than two years ago due to beingAdrian Bunk2008-03-171-1/+0
| | | | | | | | | | | | | | | | no longer working for some time. A driver that had been marked as BROKEN for such a long time seems to be unlikely to be revived in the forseeable future. But if anyone wants to ever revive this driver, the code is still present in the older kernel releases. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Alan Cox <alan@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* rewrite rdNick Piggin2008-02-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a rewrite of the ramdisk block device driver. The old one is really difficult because it effectively implements a block device which serves data out of its own buffer cache. It relies on the dirty bit being set, to pin its backing store in cache, however there are non trivial paths which can clear the dirty bit (eg. try_to_free_buffers()), which had recently lead to data corruption. And in general it is completely wrong for a block device driver to do this. The new one is more like a regular block device driver. It has no idea about vm/vfs stuff. It's backing store is similar to the buffer cache (a simple radix-tree of pages), but it doesn't know anything about page cache (the pages in the radix tree are not pagecache pages). There is one slight downside -- direct block device access and filesystem metadata access goes through an extra copy and gets stored in RAM twice. However, this downside is only slight, because the real buffercache of the device is now reclaimable (because we're not playing crazy games with it), so under memory intensive situations, footprint should effectively be the same -- maybe even a slight advantage to the new driver because it can also reclaim buffer heads. The fact that it now goes through all the regular vm/fs paths makes it much more useful for testing, too. text data bss dec hex filename 2837 849 384 4070 fe6 drivers/block/rd.o 3528 371 12 3911 f47 drivers/block/brd.o Text is larger, but data and bss are smaller, making total size smaller. A few other nice things about it: - Similar structure and layout to the new loop device handlinag. - Dynamic ramdisk creation. - Runtime flexible buffer head size (because it is no longer part of the ramdisk code). - Boot / load time flexible ramdisk size, which could easily be extended to a per-ramdisk runtime changeable size (eg. with an ioctl). - Can use highmem for the backing store. [akpm@linux-foundation.org: fix build] [byron.bbradley@gmail.com: make rd_size non-static] Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Byron Bradley <byron.bbradley@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Remove old lguest bus and drivers.Rusty Russell2007-10-231-1/+0
| | | | | | | This gets rid of the lguest bus, drivers and DMA mechanism, to make way for a generic virtio mechanism. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Block driver using virtio.Rusty Russell2007-10-231-0/+1
| | | | | | | | | | | | | | | | | | | | The block driver uses scatter-gather lists with sg[0] being the request information (struct virtio_blk_outhdr) with the type, sector and inbuf id. The next N sg entries are the bio itself, then the last sg is the status byte. Whether the N entries are in or out depends on whether it's a read or a write. We accept the normal (SCSI) ioctls: they get handed through to the other side which can then handle it or reply that it's unsupported. It's not clear that this actually works in general, since I don't know if blk_pc_request() requests have an accurate rq_data_dir(). Although we try to reply -ENOTTY on unsupported commands, ioctl(fd, CDROMEJECT) returns success to userspace. This needs a separate patch. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <jens.axboe@oracle.com>
* Make lguest compile with CONFIG_BLOCK=n and CONFIG_NET=nRusty Russell2007-07-301-1/+1
| | | | | | | | | | | Gabriel C reports lguest doesn't compile with CONFIG_BLOCK=n. Fix this by introducing a config var for the block device, which depends on LGUEST && BLOCK. Do the same for the net driver, rather then depending gratuitously on CONFIG_NET. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Gabriel C <nix.or.die@googlemail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3: Disk Storage DriverGeert Uytterhoeven2007-07-221-0/+1
| | | | | | | | | | | | | | | | | Add a Disk Storage Driver for the PS3: - Implemented as a block device driver with a dynamic major - Disk names (and partitions) are of the format ps3d%c(%u) - Uses software scatter-gather with a 64 KiB bounce buffer as the hypervisor doesn't support scatter-gather Cc: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lguest: the block driverRusty Russell2007-07-191-0/+1
| | | | | | | | | | | | Lguest block driver A simple block driver for lguest. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* xen: add virtual block device driver.Jeremy Fitzhardinge2007-07-181-0/+1
| | | | | | | | | | | | | The block device frontend driver allows the kernel to access block devices exported exported by a virtual machine containing a physical block device driver. Signed-off-by: Ian Pratt <ian.pratt@xensource.com> Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Greg KH <greg@kroah.com> Cc: Jens Axboe <axboe@kernel.dk>
* Add support for Xilinx SystemACE CompactFlash interfaceGrant Likely2007-07-171-0/+1
| | | | | | | | | | | Tested on Xilinx Virtex ppc405, Katmai 440SPe, and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Stefan Roese <sr@denx.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: John William <jwilliams@itee.uq.edu.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-blockLinus Torvalds2007-07-161-1/+0
|\ | | | | | | | | | | | | | | | | * 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block: splice: direct splicing updates ppos twice more ACSI removal umem: Fix match of pci_ids in umem driver umem: Remove references to dead CONFIG_MM_MAP_MEMORY variable remove the documentation for the legacy CDROM drivers
| * more ACSI removalAdrian Bunk2007-07-161-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes some code that became dead code after the ATARI_ACSI removal. It also indirectly fixes the following bug introduced by commit c2bcf3b8978c291e1b7f6499475c8403a259d4d6: config ATARI_SLM tristate "Atari SLM laser printer support" - depends on ATARI && ATARI_ACSI!=n + depends on ATARI Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | [SPARC64]: Add Sun LDOM virtual disk driver.David S. Miller2007-07-161-0/+1
|/ | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] Remove acsi.cJens Axboe2007-07-101-1/+0
| | | | | | | | | Originally from Boaz Harrosh <bharrosh@panasas.com> It hasn't been working in 2.5 or 2.6 ever, since it's still buffer_head based. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [PATCH] remove the broken BLK_DEV_SWIM_IOP driverAdrian Bunk2006-12-131-1/+0
| | | | | | | | | | | | | | | | | | The BLK_DEV_SWIM_IOP driver has: - already been marked as BROKEN in 2.6.0 three years ago and - is still marked as BROKEN. Drivers that had been marked as BROKEN for such a long time seem to be unlikely to be revived in the forseeable future. But if anyone wants to ever revive this driver, the code is still present in the older kernel releases. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Jens Axboe <jens.axboe@oracle.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] block: floppy98 removal, really.Arthur Othieno2006-03-241-1/+0
| | | | | | | | | floppy98 went out together with the rest of PC98 subarch. Remove stale Makefile entry that remained. Signed-off-by: Arthur Othieno <apgo@patchbomb.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [BLOCK] Move all core block layer code to new block/ directoryJens Axboe2005-11-041-14/+0
| | | | | | | | drivers/block/ is right now a mix of core and driver parts. Lets move the core parts to a new top level directory. Al will move the fs/ related block parts to block/ next. Signed-off-by: Jens Axboe <axboe@suse.de>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-171-0/+47
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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