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path: root/drivers/block/skd_main.c
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2014-10-04block: disable entropy contributions for nonrot devicesMike Snitzer1-0/+1
Clear QUEUE_FLAG_ADD_RANDOM in all block drivers that set QUEUE_FLAG_NONROT. Historically, all block devices have automatically made entropy contributions. But as previously stated in commit e2e1a148 ("block: add sysfs knob for turning off disk entropy contributions"): - On SSD disks, the completion times aren't as random as they are for rotational drives. So it's questionable whether they should contribute to the random pool in the first place. - Calling add_disk_randomness() has a lot of overhead. There are more reliable sources for randomness than non-rotational block devices. From a security perspective it is better to err on the side of caution than to allow entropy contributions from unreliable "random" sources. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-08-12PCI: Remove DEFINE_PCI_DEVICE_TABLE macro useBenoit Taine1-1/+1
We should prefer `struct pci_device_id` over `DEFINE_PCI_DEVICE_TABLE` to meet kernel coding style guidelines. This issue was reported by checkpatch. A simplified version of the semantic patch that makes this change is as follows (http://coccinelle.lip6.fr/): // <smpl> @@ identifier i; declarer name DEFINE_PCI_DEVICE_TABLE; initializer z; @@ - DEFINE_PCI_DEVICE_TABLE(i) + const struct pci_device_id i[] = z; // </smpl> [bhelgaas: add semantic patch] Signed-off-by: Benoit Taine <benoit.taine@lip6.fr> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-08-09block: use pci_zalloc_consistentJoe Perches1-16/+9
Remove the now unnecessary memset too. Signed-off-by: Joe Perches <joe@perches.com> Mike Miller <mike.miller@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-05-28Merge branch 'for-3.16/core' into for-3.16/driversJens Axboe1-2/+2
mtip32xx uses blk_mq_alloc_reserved_request(), so pull in the core changes so we have a properly merged end result. Signed-off-by: Jens Axboe <axboe@fb.com>
2014-04-22skd: Use pci_enable_msix_exact() instead of pci_enable_msix_range()Alexander Gordeev1-4/+3
Function pci_enable_msix_exact() is a variation of pci_enable_msix_range() that allows a device driver to request a particular number of MSI-X interrupts, rather than any number within a specified range. Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: linux-pci@vger.kernel.org Signed-off-by: Jens Axboe <axboe@fb.com>
2014-04-17sd/skd: stuff discard page in request->completion_dataJens Axboe1-2/+2
Store the pointer to the page there, so we can always safely reference it from end_io context where ->bio may have been cleared. Signed-off-by: Jens Axboe <axboe@fb.com>
2014-04-16block: remove struct request buffer memberJens Axboe1-3/+2
This was used in the olden days, back when onions were proper yellow. Basically it mapped to the current buffer to be transferred. With highmem being added more than a decade ago, most drivers map pages out of a bio, and rq->buffer isn't pointing at anything valid. Convert old style drivers to just use bio_data(). For the discard payload use case, just reference the page in the bio. Signed-off-by: Jens Axboe <axboe@fb.com>
2014-02-22skd: Use pci_enable_msix_range() instead of pci_enable_msix()Alexander Gordeev1-26/+12
As result of deprecation of MSI-X/MSI enablement functions pci_enable_msix() and pci_enable_msi_block() all drivers using these two interfaces need to be updated to use the new pci_enable_msi_range() and pci_enable_msix_range() interfaces. Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: linux-pci@vger.kernel.org Signed-off-by: Jens Axboe <axboe@fb.com>
2014-02-22skd: Use unified access to skdev->msix_entries throughout the codeAlexander Gordeev1-2/+1
Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: linux-pci@vger.kernel.org Signed-off-by: Jens Axboe <axboe@fb.com>
2014-02-22skd: Fix incomplete cleanup of MSI-X interruptAlexander Gordeev1-24/+26
When enabling MSI-X interrupts fails due to lack of memory the call to pci_disable_msix() is missed and the device is left with MSI-X interrupts enabled while the driver assumes otherwise. This update fixes the described misbehaviour and cleans up the code of skd_release_msix() function. Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: linux-pci@vger.kernel.org Signed-off-by: Jens Axboe <axboe@fb.com>
2014-02-22skd: Fix out of array boundary accessAlexander Gordeev1-1/+1
When enabling MSI-X, interrupts are requested for SKD_MAX_MSIX_COUNT entries in skdev->msix_entries array, while the number of actually allocated entries is skdev->msix_count. This might lead to an out of boundary access in case number of allocated entries is less than SKD_MAX_MSIX_COUNT. This update fixes the described misbehaviour. Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: linux-pci@vger.kernel.org Signed-off-by: Jens Axboe <axboe@fb.com>
2013-12-19drivers: block: Mark the functions as static in skd_main.cRashika Kheria1-2/+2
Mark functions skd_skmsg_state_to_str() and skd_skreq_state_to_str() as static in skd_main.c because they are not used outside this file. This eliminates the following warnings in skd_main.c: drivers/block/skd_main.c:5272:13: warning: no previous prototype for ‘skd_skmsg_state_to_str’ [-Wmissing-prototypes] drivers/block/skd_main.c:5284:13: warning: no previous prototype for ‘skd_skreq_state_to_str’ [-Wmissing-prototypes] Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: reorder construct/destruct codeBartlomiej Zolnierkiewicz1-164/+141
Reorder placement of skd_construct(), skd_cons_sg_list(), skd_destruct() and skd_free_sg_list() functions. Then remove no longer needed function prototypes. Cc: Akhil Bhansali <abhansali@stec-inc.com> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: cleanup skd_do_inq_page_da()Bartlomiej Zolnierkiewicz1-26/+13
skdev->pdev and skdev->pdev->bus are always different than NULL in skd_do_inq_page_da() so simplify the code accordingly. Also cache skdev->pdev value in pdev variable while at it. Cc: Akhil Bhansali <abhansali@stec-inc.com> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: remove redundant skdev->pdev assignment from skd_pci_probe()Bartlomiej Zolnierkiewicz1-1/+1
skdev->pdev is set to pdev twice in skd_pci_probe(), first time through skd_construct() call and the second time directly in the function. Remove the second assignment as it is not needed. Cc: Akhil Bhansali <abhansali@stec-inc.com> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: use <asm/unaligned.h>Bartlomiej Zolnierkiewicz1-1/+1
Use <asm/unaligned.h> instead of <asm-generic/unaligned.h>. Cc: Akhil Bhansali <abhansali@stec-inc.com> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: remove SCSI subsystem specific includesBartlomiej Zolnierkiewicz1-3/+0
This is not a SCSI host driver so remove SCSI subsystem specific includes. Cc: Akhil Bhansali <abhansali@stec-inc.com> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: register block device only if some devices are presentBartlomiej Zolnierkiewicz1-21/+12
Register block device in skd_pci_probe() instead of in skd_init() so it is registered only if some devices are present (currently it is always registered when the driver is loaded). Please note that this change depends on the fact that register_blkdev(0, ...) never returns 0. Cc: Akhil Bhansali <abhansali@stec-inc.com> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: fix error messages in skd_init()Bartlomiej Zolnierkiewicz1-12/+9
* change priority level from KERN_INFO to KERN_ERR * add "skd: " prefix * do minor CodingStyle fixes Cc: Akhil Bhansali <abhansali@stec-inc.com> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: fix error paths in skd_init()Bartlomiej Zolnierkiewicz1-3/+13
Cc: Akhil Bhansali <abhansali@stec-inc.com> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: fix unregister_blkdev() placementBartlomiej Zolnierkiewicz1-1/+1
register_blkdev() is called before pci_register_driver() in skd_init() so unregister_blkdev() should be called after pci_unregister_driver() in skd_exit(). Fix it. Cc: Akhil Bhansali <abhansali@stec-inc.com> Cc: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: more removal of bio-based codeMike Snitzer1-71/+20
Remove skd_flush_cmd structure and skd_flush_slab. Remove skd_end_request wrapper around skd_end_request_blk. Remove skd_requeue_request, use blk_requeue_request directly. Cleanup some comments (remove "bio" info) and whitespace. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: cleanup the skd_*() function block wrappingJens Axboe1-37/+15
Just call the block functions directly, don't wrap them in skd helpers. With only one queueing model enabled, there's no point in doing that. Also kill the ->start_time and ->bio from the skd_request_context, we don't use those anymore. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: rip out bio pathJens Axboe1-467/+62
The skd driver has a selectable rq or bio based queueing model. For 3.14, we want to turn this into a single blk-mq interface instead. With the immutable biovecs being merged in 3.13, the bio model would need patches to even work. So rip it out, with a conversion pending for blk-mq in the next release. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: fix error return code in skd_pci_probe()Wei Yongjun1-1/+3
Fix to return -ENOMEM in the skd construct error handling case instead of 0, as done elsewhere in this function. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: Replaced custom debug PRINTKs with pr_debugrchinthekindi1-284/+407
Replaced DPRINTK() and VPRINTK() with pr_debug(). Signed-off-by: Ramprasad C <ramprasad.chinthekindi@hgst.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08skd: Fix checkpatch ERRORS and removed unused functionsAkhil Bhansali1-22/+31
This patch fixes checkpatch.pl errors for assignment in if condition. It also removes unused readq / readl function calls. As Andrew had disabled the compilation of drivers for 32 bit, I have modified format specifiers in few VPRINTKs to avoid warnings during 64 bit compilation. Signed-off-by: Akhil Bhansali <abhansali@stec-inc.com> Reviewed-by: Ramprasad Chinthekindi <rchinthekindi@stec-inc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-11-08Add support for sTec's pci-e flash card KronosAkhil Bhansali1-0/+5817
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>
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