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linux-stable/drivers/scsi
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Finn Thain 08348b1c9b scsi: ncr5380: Improve interrupt latency during PIO tranfers 
Large PIO transfers are broken up into chunks to try to avoid disabling
local IRQs for long periods. But IRQs are still disabled for too long
and this causes SCC FIFO overruns during serial port transfers.

This patch reduces the PIO chunk size to reduce interrupt latency to
something on the order of milliseconds, at the expense of additional CPU
overhead from extra iterations of the NCR5380_main() loop.

That CPU overhead is a problem for slow machines (e.g. mac_scsi on 25
MHz 68030) but these machines generally use PDMA not PIO. This patch
doesn't make the overhead any worse on my Mac LC III (because it only
gets about 510 accesses per ms).

This patch decreases disk performance by a fraction of one percent for
dmx3191d on my 333 MHz PowerPC 750. Other affected hardware (such as
g_NCR5380 on x86) was not tested but 5380 ISA cards generally use PDMA
and not PIO.

[mkp: fix whitespace]

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14 14:11:12 -04:00
..
aacraid scsi: aacraid: mark aac_src_select_comm() static 2016-09-09 07:08:38 -04:00
aic7xxx aic7xxx: Fix queue depth handling 2016-02-23 21:27:02 -05:00
aic94xx scsi: aic94xx: Add missing error code assignment before test 2016-08-25 23:39:25 -04:00
arcmsr arcmsr: change driver version to v1.30.00.22-20151126 2015-11-30 18:51:20 -05:00
arm scsi: rename SCSI_MAX_{SG, SG_CHAIN}_SEGMENTS 2016-04-15 16:53:14 -04:00
be2iscsi scsi: be2iscsi: Add missing unlock for mbox_lock 2016-08-30 22:26:15 -04:00
bfa scsi: bfa: Do not dereference port before it is null checked 2016-09-02 06:09:16 -04:00
bnx2fc scsi: bnx2fc: Mark symbols static where possible 2016-09-09 07:11:07 -04:00
bnx2i bnx2i: fix spelling mistake "complection" -> "completion" 2016-07-12 23:16:31 -04:00
csiostor scsi: csiostor: Fix completion usage 2016-09-14 13:19:15 -04:00
cxgbi cxgb3i, cxgb4i: fix symbol not declared sparse warning 2016-07-25 10:31:09 -07:00
cxlflash scsi: cxlflash: Fix context reference tracking on detach 2016-09-14 12:47:42 -04:00
device_handler Merge branch 'fixes' into misc 2016-05-17 21:12:50 -04:00
dpt
esas2r scsi: esas2r: don't reinitialize adapter's req_table 2016-08-25 22:28:17 -04:00
fcoe scsi: fcoe: provide translation table between Ethernet and FC port speeds 2016-08-23 22:27:47 -04:00
fnic fnic: pci_dma_mapping_error() doesn't return an error code 2016-07-20 20:49:17 -04:00
hisi_sas scsi: hisi_sas: send three identify before phy up 2016-09-14 12:54:18 -04:00
ibmvscsi scsi: ibmvfc: fix typo in parameter description 2016-09-09 07:30:09 -04:00
ibmvscsi_tgt scsi: ibmvscsis: Fixed a bug reported by Dan Carpenter 2016-09-04 01:28:07 -04:00
isci Merge branch 'for-4.7-zac' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2016-05-23 17:53:39 -07:00
libfc scsi: libfc: do not send ABTS when resetting exchanges 2016-08-18 22:35:17 -04:00
libsas SCSI misc on 20160727 2016-07-27 14:48:37 -07:00
lpfc SCSI misc on 20160805 2016-08-05 23:47:27 -04:00
megaraid scsi: megaraid_sas: add in missing white space in error message text 2016-09-14 13:12:28 -04:00
mpt3sas mpt3sas: Don't spam logs if logging level is 0 2016-08-08 21:27:13 -04:00
mvsas libata/libsas: Define ATA_CMD_NCQ_NON_DATA 2016-05-09 12:36:44 -04:00
osd scsi/osd: open code blk_make_request 2016-07-20 17:38:35 -06:00
pcmcia scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
pm8001 pm8001: fix typo 2016-07-12 23:16:31 -04:00
qla2xxx scsi: qla2xxx: fix spelling mistake "retyring" -> "retrying" 2016-08-31 00:27:34 -04:00
qla4xxx scsi: qla4xxx: Mark symbols static where possible 2016-09-02 06:06:43 -04:00
smartpqi scsi: smartpqi: bump driver version 2016-09-02 14:09:34 -04:00
snic snic: Fix use-after-free in case of a dma mapping error 2016-07-12 23:16:31 -04:00
sym53c8xx_2 scsi: sym53c8xx_2: Use complete() instead complete_all() 2016-09-14 13:19:29 -04:00
ufs scsi: ufs: Fix a wrong string in power mode change 2016-09-09 07:21:25 -04:00
.gitignore
3w-9xxx.c 3w-9xxx: don't unmap bounce buffered commands 2015-10-07 10:24:48 -07:00
3w-9xxx.h 3w-9xxx: fix command completion race 2015-04-27 10:10:19 -07:00
3w-sas.c 3w-sas: fix command completion race 2015-04-27 10:04:39 -07:00
3w-sas.h 3w-sas: fix command completion race 2015-04-27 10:04:39 -07:00
3w-xxxx.c 3w-xxxx: Pass through compat mode ioctls 2016-01-08 12:51:03 -05:00
3w-xxxx.h 3w-xxxx: fix command completion race 2015-04-27 10:05:55 -07:00
53c700.c scsi: remove current_cmnd field from struct scsi_device 2016-07-13 22:33:23 -04:00
53c700.h scsi: remove current_cmnd field from struct scsi_device 2016-07-13 22:33:23 -04:00
53c700.scr
53c700_d.h_shipped
a100u2w.c scsi: a100u2w: trivial typo in printk 2015-08-07 15:03:42 +02:00
a100u2w.h
a2091.c
a2091.h
a3000.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
a3000.h
a4000t.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
advansys.c Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
aha152x.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
aha152x.h
aha1542.c scsi: aha1542: avoid uninitialized variable warnings 2016-02-23 21:27:02 -05:00
aha1542.h aha1542: fix include guard and remove useless changelog 2015-04-09 18:08:31 -07:00
aha1740.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
aha1740.h scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
am53c974.c am53c974: Fix crash during modprobe 2015-04-17 10:13:56 -07:00
atari_scsi.c atari_scsi: Allow can_queue to be increased for Falcon 2016-04-11 16:57:09 -04:00
atp870u.c atp870u: Introduce atp870_init() 2015-11-25 22:08:55 -05:00
atp870u.h atp870u: Remove scam_on from struct atp_unit 2015-11-25 22:08:52 -05:00
BusLogic.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
BusLogic.h
bvme6000_scsi.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
ch.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-04-14 09:50:27 -07:00
constants.c scsi: reduce CONFIG_SCSI_CONSTANTS=y impact by 8k 2016-04-11 16:57:09 -04:00
dc395x.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
dc395x.h
dmx3191d.c ncr5380: Remove DONT_USE_INTR and AUTOPROBE_IRQ macros 2016-04-11 16:57:09 -04:00
dpt_i2o.c dpt_i2o: fix build warning 2016-02-23 21:27:02 -05:00
dpti.h scsi: use 64-bit LUNs 2014-07-17 22:07:37 +02:00
dtc.c ncr5380: Remove DONT_USE_INTR and AUTOPROBE_IRQ macros 2016-04-11 16:57:09 -04:00
dtc.h ncr5380: Merge DMA implementation from atari_NCR5380 core driver 2016-04-11 16:57:09 -04:00
eata.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
eata_generic.h
eata_pio.c eata_pio: missing break statement 2016-05-10 22:01:07 -04:00
eata_pio.h
esp_scsi.c scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
esp_scsi.h esp_scsi: correctly detect am53c974 2014-11-24 16:13:16 +01:00
fdomain.c scsi: fdomain: drop fdomain_pci_tbl when built-in 2016-02-23 21:27:02 -05:00
fdomain.h
FlashPoint.c FlashPoint: fix build warning 2015-11-09 16:32:14 -08:00
g_NCR5380.c ncr5380: Update usage documentation 2016-04-11 16:57:09 -04:00
g_NCR5380.h ncr5380: Merge DMA implementation from atari_NCR5380 core driver 2016-04-11 16:57:09 -04:00
g_NCR5380_mmio.c
gdth.c gdth: replace struct timeval with ktime_get_real_seconds() 2016-02-25 21:16:49 -05:00
gdth.h
gdth_ioctl.h
gdth_proc.c gdth: replace struct timeval with ktime_get_real_seconds() 2016-02-25 21:16:49 -05:00
gdth_proc.h
gvp11.c
gvp11.h
hosts.c scsi: configure runtime pm before calling device_add in scsi_add_host_with_dma 2016-08-25 23:39:24 -04:00
hpsa.c hpsa: change hpsa_passthru_ioctl timeout 2016-07-15 15:40:54 -04:00
hpsa.h hpsa: correct handling of HBA device removal 2016-04-29 19:08:24 -04:00
hpsa_cmd.h hpsa: update copyright information 2016-02-23 21:27:02 -05:00
hptiop.c hptiop: Support HighPoint RR36xx HBAs and Support SAS tape and SAS media changer 2015-08-12 13:14:57 -07:00
hptiop.h hptiop: Support HighPoint RR36xx HBAs and Support SAS tape and SAS media changer 2015-08-12 13:14:57 -07:00
imm.c imm: check parport_claim 2016-02-25 21:10:53 -05:00
imm.h
in2000.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
in2000.h
initio.c SCSI: initio: remove duplicate module device table 2015-11-20 11:39:03 -05:00
initio.h
ipr.c scsi: ipr: Add asynchronous error notification 2016-08-25 23:39:15 -04:00
ipr.h scsi: ipr: Add asynchronous error notification 2016-08-25 23:39:15 -04:00
ips.c ips: remove pointless #warning 2015-06-02 17:24:54 -07:00
ips.h
iscsi_boot_sysfs.c ibft: Expose iBFT acpi header via sysfs 2016-05-16 11:14:29 -04:00
iscsi_tcp.c scsi_tcp: block BH in TCP callbacks 2016-05-19 11:36:49 -07:00
iscsi_tcp.h iscsi_tcp: Use ahash 2016-01-27 20:36:10 +08:00
jazz_esp.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
Kconfig smartpqi: initial commit of Microsemi smartpqi driver 2016-08-12 16:00:09 -04:00
lasi700.c
libiscsi.c libiscsi: Remove set-but-not-used variables 2016-04-11 16:57:09 -04:00
libiscsi_tcp.c iscsi_tcp: Use ahash 2016-01-27 20:36:10 +08:00
mac53c94.c PCI: Remove includes of asm/pci-bridge.h 2016-02-05 16:29:28 -06:00
mac53c94.h
mac_esp.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
mac_scsi.c mac_scsi: Fix pseudo DMA implementation 2016-04-11 16:57:09 -04:00
Makefile smartpqi: initial commit of Microsemi smartpqi driver 2016-08-12 16:00:09 -04:00
megaraid.c megaraid : use dev_printk when possible 2015-08-26 07:23:04 -07:00
megaraid.h
mesh.c PCI: Remove includes of asm/pci-bridge.h 2016-02-05 16:29:28 -06:00
mesh.h
mvme16x_scsi.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
mvme147.c
mvme147.h
mvumi.c scsi: mvumi: use __maybe_unused to hide pm functions 2016-03-05 17:07:46 -05:00
mvumi.h
ncr53c8xx.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ncr53c8xx.h scsi: Remove CONFIG_SCSI_MULTI_LUN 2014-07-17 22:07:35 +02:00
NCR53c406a.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
NCR5380.c scsi: ncr5380: Improve interrupt latency during PIO tranfers 2016-09-14 14:11:12 -04:00
NCR5380.h scsi: ncr5380: Improve interrupt latency during PIO tranfers 2016-09-14 14:11:12 -04:00
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
nsp32.h
nsp32_debug.c
nsp32_io.h
osst.c scsi: remove scsi_driver owner field 2014-11-24 20:01:28 +01:00
osst.h
osst_detect.h
osst_options.h
pas16.c ncr5380: Remove DONT_USE_INTR and AUTOPROBE_IRQ macros 2016-04-11 16:57:09 -04:00
pas16.h ncr5380: Merge DMA implementation from atari_NCR5380 core driver 2016-04-11 16:57:09 -04:00
pmcraid.c scsi: pmcraid: mark symbols static where possible 2016-09-04 01:28:07 -04:00
pmcraid.h
ppa.c scsi: ppa: use new parport device model 2016-02-23 21:27:02 -05:00
ppa.h
ps3rom.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qla1280.c qla1280: Don't allocate 512kb of host tags 2016-04-30 09:25:26 -07:00
qla1280.h
qlogicfas.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qlogicfas408.c
qlogicfas408.h
qlogicpti.c qlogicpti: Return correct error code 2016-03-01 20:06:49 -05:00
qlogicpti.h
raid_class.c
script_asm.pl
scsi.c scsi: remove the disable_blk_mq host flag 2016-07-15 15:11:20 -04:00
scsi.h
scsi_common.c scsi: add scsi_set_sense_field_pointer() 2016-04-04 12:07:42 -04:00
scsi_debug.c scsi_debug: fix sleep in invalid context 2016-07-12 23:16:31 -04:00
scsi_devinfo.c SCSI: fix new bug in scsi_dev_info_list string matching 2016-06-29 00:51:31 -04:00
scsi_dh.c scsi_dh: move 'dh_state' sysfs attribute to generic code 2015-12-02 16:29:19 -05:00
scsi_error.c Merge remote-tracking branch 'mkp-scsi/4.7/scsi-fixes' into fixes 2016-06-18 11:59:01 -07:00
scsi_ioctl.c scsi: return EAGAIN when resetting a device under EH 2014-11-12 11:16:12 +01:00
scsi_lib.c scsi_lib: correctly retry failed zero length REQ_TYPE_FS commands 2016-05-22 14:52:45 -04:00
scsi_lib_dma.c
scsi_logging.c scsi_logging: return void for dev_printk() functions 2015-02-04 08:00:24 -08:00
scsi_logging.h scsi: simplify scsi_log_(send|completion) 2014-11-12 11:16:05 +01:00
scsi_module.c
scsi_netlink.c
scsi_pm.c scsi: Set request queue runtime PM status back to active on resume 2016-02-19 10:52:45 -05:00
scsi_priv.h scsi: move function declarations to scsi_priv.h 2016-08-31 00:28:32 -04:00
scsi_proc.c scsi: disable automatic target scan 2016-04-11 16:57:09 -04:00
scsi_sas_internal.h scsi_transport_sas: add 'scsi_target_id' sysfs attribute 2016-03-14 21:05:04 -04:00
scsi_scan.c scsi: move function declarations to scsi_priv.h 2016-08-31 00:28:32 -04:00
scsi_sysctl.c scsi: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:16 -07:00
scsi_sysfs.c Revert "scsi: fix soft lockup in scsi_remove_target() on module removal" 2016-04-15 16:53:07 -04:00
scsi_trace.c scsi-trace: define ZBC_IN and ZBC_OUT 2016-04-11 16:57:09 -04:00
scsi_transport_api.h
scsi_transport_fc.c scsi_transport_fc: Unexport scsi_is_fc_vport() 2016-04-11 16:57:09 -04:00
scsi_transport_iscsi.c scsi_transport_iscsi: Declare local symbols static 2016-04-11 16:57:09 -04:00
scsi_transport_sas.c scsi: disable automatic target scan 2016-04-11 16:57:09 -04:00
scsi_transport_spi.c [SCSI] Fix printk typos in drivers/scsi 2015-08-07 14:28:45 +02:00
scsi_transport_srp.c IB/srp: Avoid using uninitialized variable 2015-07-14 13:20:09 -04:00
scsi_typedefs.h
scsicam.c scsi: PC partition tables are little endian 2014-11-12 11:15:54 +01:00
sd.c - initially based on Jens' 'for-4.8/core' (given all the flag churn) and 2016-07-26 17:12:11 -07:00
sd.h sd: Fix rw_max for devices that report an optimal xfer size 2016-06-01 22:07:47 -04:00
sd_dif.c block: Consolidate static integrity profile properties 2015-10-21 14:42:38 -06:00
sense_codes.h scsi: move Additional Sense Codes to separate file 2016-04-11 16:57:09 -04:00
ses.c ses: fix discovery of SATA devices in SAS enclosures 2015-12-18 19:29:50 -08:00
sg.c scsi: sg: Use mult_frac, drop MULDIV macro 2016-08-30 22:18:59 -04:00
sgiwd93.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
sim710.c scsi: sim710: fix build warning 2016-02-23 21:27:02 -05:00
sni_53c710.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
sr.c scsi: sr: constify sr_pm_ops structure 2016-09-04 01:28:08 -04:00
sr.h scsi: introduce sdev_prefix_printk() 2014-11-12 11:15:57 +01:00
sr_ioctl.c sr: reduce debug noise in sr_do_ioctl 2015-01-20 19:43:24 +01:00
sr_vendor.c scsi: Implement sr_printk() 2014-07-17 22:07:39 +02:00
st.c st: clear ILI if Medium Error 2016-04-25 22:08:16 -04:00
st.h st: Remove obsolete scsi_tape.max_pfn 2015-11-18 11:59:09 -05:00
st_options.h
stex.c stex: Add S3/S4 support 2016-02-23 21:27:02 -05:00
storvsc_drv.c scsi: storvsc: Filter out storvsc messages CD-ROM medium not present 2016-07-12 23:16:31 -04:00
sun3_scsi.c ncr5380: Remove disused atari_NCR5380.c core driver 2016-04-11 16:57:09 -04:00
sun3_scsi.h sun3_scsi: Move macro definitions 2014-11-20 09:11:15 +01:00
sun3_scsi_vme.c scsi/NCR5380: merge sun3_scsi_vme.c into sun3_scsi.c 2014-05-28 12:16:28 +02:00
sun3x_esp.c arch, drivers: don't include <asm/io.h> directly, use <linux/io.h> instead 2015-08-10 23:07:05 -04:00
sun_esp.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
sym53c416.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
sym53c416.h
t128.c ncr5380: Remove DONT_USE_INTR and AUTOPROBE_IRQ macros 2016-04-11 16:57:09 -04:00
t128.h ncr5380: Merge DMA implementation from atari_NCR5380 core driver 2016-04-11 16:57:09 -04:00
u14-34f.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ultrastor.c
ultrastor.h
virtio_scsi.c scsi: virtio_scsi: Use complete() instead complete_all() 2016-09-14 13:19:57 -04:00
vmw_pvscsi.c vmw_pvscsi: Change to update maintainer details (name, email) 2016-07-12 23:16:31 -04:00
vmw_pvscsi.h vmw_pvscsi: Change to update maintainer details (name, email) 2016-07-12 23:16:31 -04:00
wd33c93.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
wd33c93.h
wd719x.c [SCSI] Fix printk typos in drivers/scsi 2015-08-07 14:28:45 +02:00
wd719x.h scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
wd7000.c scsi: wd7000: print sector number as 64-bit 2016-07-12 23:16:31 -04:00
xen-scsifront.c xen: Use correctly the Xen memory terminologies 2015-09-08 18:03:49 +01:00
zalon.c
zorro7xx.c