- 27 Mar, 2014 6 commits
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Christoph Hellwig authored
This allows drivers to specify the size of their per-command private data in the host template and then get extra memory allocated for each command instead of needing another allocation in ->queuecommand. With the current SCSI code that already does multiple allocations for each command this probably doesn't make a big performance impact, but it allows to clean up the drivers, and prepare them for using the blk-mq infrastructure where the common allocation will make a difference. Signed-off-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
James Bottomley <JBottomley@Parallels.com>
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Christoph Hellwig authored
Just have one level of alloc/free functions that take a host instead of two levels for the allocation and different calling conventions for the free. [fengguang.wu@intel.com: docbook problems spotted, now fixed] Signed-off-by:
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Christoph Hellwig authored
We don't use the passed in scsi command for anything, so just add a adapter- wide internal status to go along with the internal scb that is used unter int_mtx to pass back the return value and get rid of all the complexities and abuse of the scsi_cmnd structure. This gets rid of the only user of scsi_allocate_command/scsi_free_command, which can now be removed. [jejb: checkpatch fixes] Signed-off-by:
Adam Radford <aradford@gmail.com> Signed-off-by:
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Hannes Reinecke authored
The scsi_device now has VPD page83 information attached, so there is no need to query it again. Signed-off-by:
Hannes Reinecke <hare@suse.de> Signed-off-by:
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Hannes Reinecke authored
EVPD page 0x83 is used to uniquely identify the device. So instead of having each and every program issue a separate SG_IO call to retrieve this information it does make far more sense to display it in sysfs. Some older devices (most notably tapes) will only report reliable information in page 0x80 (Unit Serial Number). So export this in the sysfs attribute 'vpd_pg80'. [jejb: checkpatch fix] [hare: attach after transport configure] [fengguang.wu@intel.com: spotted problems with the original now fixed] Signed-off-by:
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Hannes Reinecke authored
We should be returning the number of bytes of the requested VPD page in scsi_vpd_inquiry. This makes it easier for the caller to verify the required space. [jejb: fix up mm warning spotted by Sergey] Tested-by:
Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by:
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- 19 Mar, 2014 24 commits
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Hannes Reinecke authored
Instead of modifying attributes after the device has been created we should be using the 'is_visible' callback to avoid races. Signed-off-by:
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Stephen M. Cameron authored
Signed-off-by:
Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by:
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Stephen M. Cameron authored
It caused the i/o request to always be counted as ineligible for the accelerated i/o path on 32 bit systems and negatively affected performance. Signed-off-by:
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Chad Dupuis authored
Fixes some build warnings such as: drivers/scsi/qla2xxx/qla_attr.c:162:6: warning: format '%lx' expects argument of type 'long unsigned int', but argument 6 has type 'size_t'" and drivers/scsi/qla2xxx/qla_init.c:5198:7: warning: format '%lx' expects argument of type 'long unsigned int', but argument 5 has type 'uint32_t' [-Wformat] Signed-off-by:
Chad Dupuis <chad.dupuis@qlogic.com> Signed-off-by:
Saurav Kashyap <saurav.kashyap@qlogic.com> Signed-off-by:
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Ben Hutchings authored
udelay() does not work on some architectures for values above 2000, in particular on ARM: ERROR: "__bad_udelay" [drivers/scsi/bfa/bfa.ko] undefined! Reported-by:
Vagrant Cascadian <vagrant@debian.org> Signed-off-by:
Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
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Arvind Kumar authored
This change is about the following: (1) If the number of targets is 16+ then default ring_pages to 32. (2) Change default queue depth (per device) to 254. (3) Implement change_queue_depth function so that queue_depth per device can be changed at run time. Honors the request only if coming from sysfs. (4) Clean up the info returned by modinfo. Signed-off-by:Arvind Kumar <arvindkumar@vmware.com> Signed-off-by:
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Rishi Mehta authored
This change allows pvscsi driver to coalesce I/O requests before issuing them. The number of I/O's coalesced can be dynamically configured based on the workload. Signed-off-by:
Rishi Mehta <rmehta@vmware.com> Signed-off-by:
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Arvind Kumar authored
This change ensures that pvscsi_abort() function returns SUCCESS only when the command in question was actually completed, otherwise returns FAILURE. The code before change, was causing a bug where driver tries to complete a command to the mid-layer while the mid-layer has already requested the driver to abort that command, in response to which the driver has responded with SUCCESS causing mid-layer to free the command struct. Signed-off-by:
Ewan Milne <emilne@redhat.com> Signed-off-by:
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Michael Opdenacker authored
It's a NOOP since 2.6.35 and it will be removed one day. [jejb: remove from missed arm scsi drivers] Signed-off-by:
Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by:
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Anil Gurumurthy authored
Signed-off-by:
Anil Gurumurthy <anil.gurumurthy@qlogic.com> Signed-off-by:
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Wendy Xiong authored
Add the appropriate definition and table entry for new hardware support. Signed-off-by:
Wen Xiong <wenxiong@linux.vnet.ibm.com> Acked-by:
Brian King <brking@linux.vnet.ibm.com> Signed-off-by:
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Wendy Xiong authored
This patch adds formatting error overlay 0x21 to improve debug capabilities. [jejb: checkpatch fixes] Signed-off-by:
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Alexander Gordeev authored
As result 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> Signed-off-by:
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Alexander Gordeev authored
There is no need to call pci_disable_msi() or pci_disable_msix() in case the call to pci_enable_msi() or pci_enable_msix() failed. Signed-off-by:
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Brian King authored
If, when the ipr driver loads, the adapter is in an EEH error state, it will currently oops and not be able to recover, as it attempts to access memory that has not yet been allocated. We've seen this occur in some kexec scenarios. The following patch fixes the oops and also allows the driver to recover from these probe time EEH errors. [jejb: checkpatch fix] Signed-off-by:
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Wendy Xiong authored
Add the appropriate definition and table entry for new hardware support. Signed-off-by:
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Wendy Xiong authored
This patch removes extended delay bit on GSCSI reads/writes ops, the performance will be significanly better. Signed-off-by:
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Akinobu Mita authored
This adds a module parameter to enable clustering. Without enabling clustering support, the transfer length for read and write scsi commands is limited upto 8MB when page size is 4KB and sg_tablesize is 2048 (= SCSI_MAX_SG_CHAIN_SEGMENTS). I would like to test commands with more than that transfer length. Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Reviewed-by:
Douglas Gilbert <dgilbert@interlog.com> Reviewed-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Akinobu Mita authored
This change ensures that concurrent device access including ramdisk storage, protection info, and provisioning map by read, write, and unmap commands are protected with atomic_rw spinlock. Signed-off-by:
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Akinobu Mita authored
Currently, clustering support for scsi_debug is disabled. This is because there are for_each_sg() loops which assume that each sg list element is consisted with a single page. But enabling clustering support, each sg list element for scsi commands can be consisted with multiple pages. This replaces these for_each_sg() loops with sg mapping iterator which is capable of handling each sg list element is consisted with multiple pages. Signed-off-by:
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Akinobu Mita authored
When resp_xdwriteread() can't allocate temporary buffer, it returns -1. But the return value is used as scsi status code and -1 is not interpreted as correct code. target_core_mod has similar xdwriteread emulation code. So this mimics what target_core_mod does for xdwriteread when running out of memory. Signed-off-by:
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Akinobu Mita authored
It is unnecessary to increase dif_errors in dif_verify(), because the caller will increment it when dif_verify() detects failure. This bug was introduced by commit beb40ea4 ("[SCSI] scsi_debug: reduce duplication between prot_verify_read and prot_verify_write") Signed-off-by:
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Akinobu Mita authored
As pseudo_primary is only used in scsi_debug.c, it should be static. Signed-off-by:
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Akinobu Mita authored
Reading partially unwritten sectors generates a false positive logical block reference tag check failure when DIF is enabled. This bug is caused by missing ei_lba increment in loop of dif_verify() when unwritten sector is skipped. Signed-off-by:
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- 15 Mar, 2014 10 commits
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Christoph Hellwig authored
Avoid a spurious device get/put pair by cleaning up scsi_requeue_command and folding scsi_unprep_request into it. Signed-off-by:
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Bart Van Assche authored
Eliminate a get_device() / put_device() pair from scsi_next_command(). Both are atomic operations hence removing these slightly improves performance. [hch: slight changes due to different context] Signed-off-by:
Bart Van Assche <bvanassche@acm.org> Reviewed-by:
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Bart Van Assche authored
SCSI devices may only be removed by calling scsi_remove_device(). That function must invoke blk_cleanup_queue() before the final put of sdev->sdev_gendev. Since blk_cleanup_queue() waits for the block queue to drain and then tears it down, scsi_request_fn cannot be active anymore after blk_cleanup_queue() has returned and hence the get_device()/put_device() pair in scsi_request_fn is unnecessary. Signed-off-by:
Tejun Heo <tj@kernel.org> Reviewed-by:
Mike Christie <michaelc@cs.wisc.edu> Signed-off-by:
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Christoph Hellwig authored
Many callers won't need this and we can optimize them away. In addition the handling in the __-prefixed variants was inconsistant to start with. Based on an earlier patch from Bart Van Assche. [jejb: fix kerneldoc probelm picked up by Fengguang Wu] Signed-off-by:
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Christoph Hellwig authored
If we don't have starved devices we don't need to take the host lock to iterate over them. Also split the function up to be more clear. Signed-off-by:
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Christoph Hellwig authored
Avoid hitting the host-wide free_list lock unless we need to put a command back onto the freelist. Signed-off-by:
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Stephen M. Cameron authored
Structure was already memset to zero at the top of hpsa_scsi_ioaccel2_queue_command Signed-off-by:
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Stephen M. Cameron authored
This allows exposing physical disks behind Smart Array controllers to the OS (if the controller has the right firmware and is in "hba" mode) Signed-off-by:
Joe Handzik <joseph.t.handzik@hp.com> Signed-off-by:
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Stephen M. Cameron authored
Signed-off-by:
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Tomas Henzl authored
rc is set in the loop, and it isn't set back to zero anywhere this patch fixes it Signed-off-by:
Tomas Henzl <thenzl@redhat.com> Signed-off-by:
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