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James Bottomley dde2020754 libata: eliminate the home grown dma padding in favour of 
that provided by the block layer

ATA requires that all DMA transfers begin and end on word boundaries.
Because of this, a large amount of machinery grew up in ide to adjust
scatterlists on this basis.  However, as of 2.5, the block layer has a
dma_alignment variable which ensures both the beginning and length of a
DMA transfer are aligned on the dma_alignment boundary.  Although the
block layer does adjust the beginning of the transfer to ensure this
happens, it doesn't actually adjust the length, it merely makes sure
that space is allocated for transfers beyond the declared length.  The
upshot of this is that scatterlists may be padded to any size between
the actual length and the length adjusted to the dma_alignment safely
knowing that memory is allocated in this region.

Right at the moment, SCSI takes the default dma_aligment which is on a
512 byte boundary.  Note that this aligment only applies to transfers
coming in from user space.  However, since all kernel allocations are
automatically aligned on a minimum of 32 byte boundaries, it is safe to
adjust them in this manner as well.

tj: * Adjusting sg after padding is done in block layer.  Make libata
      set queue alignment correctly for ATAPI devices and drop broken
      sg mangling from ata_sg_setup().
    * Use request->raw_data_len for ATAPI transfer chunk size.
    * Killed qc->raw_nbytes.
    * Separated out killing qc->n_iter.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-02-19 11:36:56 +01:00
..
aacraid [SCSI] aacraid: informational sysfs value corrections 2008-02-11 10:20:54 -06:00
aic7xxx scsi: fix makefile for aic7(3*x) 2008-02-09 10:43:58 +01:00
aic7xxx_old
aic94xx [SCSI] aic94xx: fix ABORT_TASK define conflict 2008-02-11 13:36:31 -06:00
arcmsr [SCSI] arcmsr: updates (1.20.00.15) 2008-02-07 18:02:44 -06:00
arm [SCSI] fas216: Use scsi_eh API for REQUEST_SENSE invocation 2008-02-11 12:43:12 -06:00
dpt [SCSI] dpt: whitespace cleanup 2007-04-01 10:10:04 -05:00
ibmvscsi Remove pointless casts from void pointers 2008-02-06 10:41:01 -08:00
libsas libata: eliminate the home grown dma padding in favour of 2008-02-19 11:36:56 +01:00
lpfc [SCSI] lpfc 8.2.5 : Update lpfc driver version to 8.2.5 2008-02-11 17:52:58 -06:00
megaraid [SCSI] MegaRAID driver management char device moved to misc 2008-02-11 10:20:53 -06:00
pcmcia pcmcia: convert some internal-only ioaddr_t to unsigned int 2008-02-05 09:44:08 -08:00
qla2xxx [SCSI] qla2xxx: Update version number to 8.02.00-k8. 2008-02-07 18:02:40 -06:00
qla4xxx [SCSI] qla4xxx: add async scan support 2008-02-07 18:02:35 -06:00
sym53c8xx_2 [SCSI] sym53c8xx: fix resid calculation 2008-02-07 18:02:34 -06:00
.gitignore [SCSI] 53c7xx: fix removal fallout 2008-01-11 18:22:30 -06:00
3w-9xxx.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
3w-9xxx.h [SCSI] 3w-9xxx: add support for 9690SA 2007-07-21 08:57:40 -05:00
3w-xxxx.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
3w-xxxx.h [SCSI] 3ware 8000 serialize reset code 2007-01-06 09:18:00 -06:00
53c700.c [SCSI] replace sizeof sense_buffer with SCSI_SENSE_BUFFERSIZE 2008-01-23 11:29:27 -06:00
53c700.h [SCSI] 53c700: m68k support for the 53c700 SCSI core 2007-06-17 16:15:56 -05:00
53c700.scr
53c700_d.h_shipped
a100u2w.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
a100u2w.h [SCSI] a100u2w: Convert into Linux style 2007-06-17 16:09:29 -05:00
a2091.c cleanup after APUS removal 2008-02-06 10:41:01 -08:00
a2091.h
a3000.c cleanup after APUS removal 2008-02-06 10:41:01 -08:00
a3000.h
a4000t.c [SCSI] kmalloc + memset conversion to kzalloc 2007-10-12 14:41:00 -04:00
advansys.c [SCSI] advansys: fix overrun_buf aligned bug 2008-02-11 10:20:53 -06:00
aha152x.c [SCSI] aha152x: Use scsi_eh API for REQUEST_SENSE invocation 2008-01-11 18:22:34 -06:00
aha152x.h [SCSI] aha152x: fix debug mode symbol conflict 2007-08-04 09:11:06 -05:00
aha1542.c MAINTAINERS: remove Adam Fritzler, remove his email address in other sources 2008-02-03 16:36:24 +02:00
aha1542.h
aha1740.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
aha1740.h
aic7xxx_old.c Remove pointless casts from void pointers 2008-02-06 10:41:01 -08:00
atari_dma_emul.c
atari_NCR5380.c [SCSI] atari_NCR5380, sun3_NCR5380: operator precedence fix 2008-01-11 18:28:57 -06:00
atari_scsi.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
atari_scsi.h m68k: Atari SCSI driver compile fixes 2007-05-04 17:59:05 -07:00
atp870u.c [SCSI] atp870u: convert to accessors and !use_sg cleanup 2008-01-11 18:22:38 -06:00
atp870u.h
BusLogic.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
BusLogic.h [SCSI] BusLogic: Replace 'boolean' by 'bool' 2007-02-07 18:32:29 -05:00
bvme6000_scsi.c [SCSI] kmalloc + memset conversion to kzalloc 2007-10-12 14:41:00 -04:00
ch.c [SCSI] ch: remove forward declarations 2008-01-25 09:22:12 -06:00
constants.c [SCSI] Add Documentation and integrate into docbook build 2008-01-11 18:22:40 -06:00
dc395x.c [SCSI] dc395x: fix uninitialized var warning 2008-02-07 18:02:43 -06:00
dc395x.h
dmx3191d.c
dpt_i2o.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
dpti.h revert "dpt_i2o: convert to SCSI hotplug model" 2007-12-10 19:43:54 -08:00
dtc.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
dtc.h
eata.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
eata_generic.h [SCSI] eata_pio: Remove FALSE/TRUE defines 2007-03-20 11:27:03 -05:00
eata_pio.c [SCSI] aic7xxx_old, eata_pio, ips, libsas: don't zero out sense_buffer in queuecommand 2008-01-23 11:29:26 -06:00
eata_pio.h
esp_scsi.c esp_scsi: fix reset cleanup spinlock recursion 2007-12-10 19:43:55 -08:00
esp_scsi.h [SCSI] ESP: Revert ESP_BUS_TIMEOUT back down to 250 2007-07-31 10:51:25 -05:00
fd_mcs.c [SCSI] fd_mcs: convert to accessors and !use_sg cleanup 2008-01-11 18:22:35 -06:00
fdomain.c [SG] Update drivers to use sg helpers 2007-10-22 21:19:53 +02:00
fdomain.h
FlashPoint.c FlashPoint, use BIT instead of BITW 2007-10-19 11:53:42 -07:00
g_NCR5380.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
g_NCR5380.h
g_NCR5380_mmio.c
gdth.c [SCSI] gdth: update deprecated pci_find_device 2008-02-13 09:33:10 -06:00
gdth.h [SCSI] gdth: !use_sg cleanup and use of scsi accessors 2007-10-12 14:56:13 -04:00
gdth_ioctl.h
gdth_proc.c [SCSI] gdth: Move members from SCp to gdth_cmndinfo, stage 2 2007-10-12 14:56:09 -04:00
gdth_proc.h [SCSI] gdth: clean up host private data 2007-10-12 14:55:46 -04:00
gvp11.c cleanup after APUS removal 2008-02-06 10:41:01 -08:00
gvp11.h
hosts.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
hptiop.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
hptiop.h [SCSI] hptiop: add more adapter models and other fixes 2008-01-11 18:28:06 -06:00
ibmmca.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
ide-scsi.c ide: add ide_read_[alt]status() inline helpers 2008-02-06 02:57:51 +01:00
imm.c [SCSI] imm: convert to accessors and !use_sg cleanup 2008-01-11 18:22:41 -06:00
imm.h
in2000.c [SCSI] in2000: convert to accessors and !use_sg cleanup 2008-01-11 18:22:36 -06:00
in2000.h
initio.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
initio.h [SCSI] initio: Convert into a real Linux driver and update to modern style 2007-05-22 11:08:56 -05:00
ipr.c libata: eliminate the home grown dma padding in favour of 2008-02-19 11:36:56 +01:00
ipr.h [SCSI] ipr: Use PCI-E reset API for new ipr adapter 2007-05-08 11:54:40 -05:00
ips.c drivers/scsi/: Spelling fixes 2008-02-03 17:28:22 +02:00
ips.h [SCSI] ips: trim trailing whitespace 2008-01-11 18:27:59 -06:00
iscsi_tcp.c [SCSI] iscsi: fix up iscsi printk prefix 2008-02-07 18:02:37 -06:00
iscsi_tcp.h [SCSI] iscsi_tcp: enable sg chaining 2008-01-11 18:28:48 -06:00
jazz_esp.c [SCSI] esp: use shost_priv 2007-05-31 17:30:04 -04:00
Kconfig [SCSI] gdth: update deprecated pci_find_device 2008-02-13 09:33:10 -06:00
lasi700.c some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
libiscsi.c [SCSI] libiscsi: fix session age rollover and remove cid encoding 2008-02-07 18:02:37 -06:00
libsrp.c [SCSI] implement scsi_data_buffer 2008-01-30 13:03:40 -06:00
mac53c94.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
mac53c94.h
mac_scsi.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
mac_scsi.h
Makefile [SCSI] ses: add new Enclosure ULD 2008-02-07 18:04:10 -06:00
megaraid.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
megaraid.h [SCSI] megaraid: fix warnings when CONFIG_PROC_FS=n 2007-05-08 11:15:08 -05:00
mesh.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
mesh.h
mvme16x_scsi.c [SCSI] kmalloc + memset conversion to kzalloc 2007-10-12 14:41:00 -04:00
mvme147.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
mvme147.h
ncr53c8xx.c [SCSI] ncr53c8xx: fix sense_buffer access bug 2008-01-30 13:03:39 -06:00
ncr53c8xx.h [SCSI] ncr53c8xx: Call scsi_host_put in release 2007-10-12 14:51:18 -04:00
NCR53c406a.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
NCR5380.c [SCSI] NCR5380: fix section mismatch 2008-01-23 13:44:31 -06:00
NCR5380.h [SCSI] NCR5380: Use scsi_eh API for REQUEST_SENSE invocation 2007-10-12 14:55:07 -04:00
NCR_D700.c [SCSI] kmalloc + memset conversion to kzalloc 2007-10-12 14:41:00 -04:00
NCR_D700.h
NCR_Q720.c some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
NCR_Q720.h
nsp32.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
nsp32.h define global BIT macro 2007-10-19 11:53:42 -07:00
nsp32_debug.c
nsp32_io.h
osst.c [SCSI] osst: fix if (...) \n #if... cases missing semicolons when false 2007-10-27 14:31:06 -05:00
osst.h [SCSI] osst: Use mutex instead of semaphore 2007-10-12 14:50:55 -04:00
osst_detect.h
osst_options.h
pas16.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
pas16.h
ppa.c [SCSI] ppa: convert to accessors and !use_sg cleanup 2008-01-11 18:22:41 -06:00
ppa.h
ps3rom.c [SCSI] ps3rom: sector size should be 512 bytes 2008-02-07 18:02:33 -06:00
ql1040_fw.h
ql1280_fw.h
ql12160_fw.h
qla1280.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
qla1280.h [SCSI] qla1280: eliminate wasted space in request and response ring 2007-10-23 12:35:35 -04:00
qlogicfas.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
qlogicfas408.c [SG] Update drivers to use sg helpers 2007-10-22 21:19:53 +02:00
qlogicfas408.h
qlogicpti.c [SCSI] replace sizeof sense_buffer with SCSI_SENSE_BUFFERSIZE 2008-01-23 11:29:27 -06:00
qlogicpti.h [SCSI] qlogicpti: Add a slave_configure method 2007-10-12 14:52:38 -04:00
qlogicpti_asm.c
raid_class.c
script_asm.pl
scsi.c [SCSI] kernel-doc: fix scsi docbook 2008-02-07 18:02:42 -06:00
scsi.h
scsi_debug.c [SCSI] scsi_debug: add XDWRITEREAD_10 support 2008-01-30 13:14:25 -06:00
scsi_debug.h
scsi_devinfo.c [SCSI] kernel-doc: use correct function name 2008-01-11 18:22:44 -06:00
scsi_error.c [SCSI] bidirectional command support 2008-01-30 13:03:41 -06:00
scsi_ioctl.c [SCSI] sd,sr: add early detection of medium not present 2008-01-11 18:22:50 -06:00
scsi_lib.c block: add request->raw_data_len 2008-02-19 11:36:35 +01:00
scsi_lib_dma.c [SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMA 2007-07-14 19:28:10 -05:00
scsi_logging.h
scsi_module.c
scsi_netlink.c [NETNS]: Consolidate kernel netlink socket destruction. 2008-01-28 15:08:07 -08:00
scsi_priv.h [SCSI] don't use __GFP_DMA for sense buffers if not required 2008-01-23 11:37:44 -06:00
scsi_proc.c [SCSI] Add Documentation and integrate into docbook build 2008-01-11 18:22:40 -06:00
scsi_sas_internal.h
scsi_scan.c [SCSI] add missing transport configure points for target and host 2008-01-23 11:29:17 -06:00
scsi_sysctl.c [SCSI] small cleanups 2007-07-18 11:16:32 -05:00
scsi_sysfs.c [SCSI] add missing transport configure points for target and host 2008-01-23 11:29:17 -06:00
scsi_tgt_if.c [SCSI] tgt: convert to use the data buffer accessors 2008-01-11 18:22:30 -06:00
scsi_tgt_lib.c drivers/scsi/: Spelling fixes 2008-02-03 17:28:22 +02:00
scsi_tgt_priv.h [SCSI] tgt: add I_T nexus support 2007-10-12 14:37:50 -04:00
scsi_transport_api.h
scsi_transport_fc.c [SCSI] Add Documentation and integrate into docbook build 2008-01-11 18:22:40 -06:00
scsi_transport_fc_internal.h [SCSI] fc_transport: add target driver support 2007-10-12 14:46:58 -04:00
scsi_transport_iscsi.c [SCSI] iscsi: bump version to 2.0-868 2008-02-07 18:02:38 -06:00
scsi_transport_sas.c drivers/scsi/: Spelling fixes 2008-02-03 17:28:22 +02:00
scsi_transport_spi.c [SCSI] scsi_transport_spi: convert to attribute groups 2008-01-23 11:29:18 -06:00
scsi_transport_srp.c [SCSI] docbook and kernel-doc updates 2008-01-11 18:22:45 -06:00
scsi_transport_srp_internal.h [SCSI] scsi_transport_srp: remove tgt dependencies 2007-10-12 14:38:09 -04:00
scsi_typedefs.h
scsi_wait_scan.c
scsicam.c [SCSI] Add Documentation and integrate into docbook build 2008-01-11 18:22:40 -06:00
sd.c [SCSI] sd: handle bad lba in sense information 2008-02-07 18:02:41 -06:00
ses.c [SCSI] ses: fix memory leaks 2008-02-11 11:00:48 -06:00
sg.c Convert SG from nopage to fault. 2008-02-07 19:09:22 -08:00
sgiwd93.c [SCSI] sgiwd93: use cached memory access to make driver work on IP28 2008-01-30 13:03:39 -06:00
sim710.c Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-07-22 11:36:49 -07:00
sni_53c710.c [SCSI] sni_53c710: Cleanup 2007-07-14 19:12:15 -05:00
sr.c [SCSI] sr: fix test unit ready responses 2008-02-07 18:02:44 -06:00
sr.h [SCSI] sr: fix test unit ready responses 2008-02-07 18:02:44 -06:00
sr_ioctl.c [SCSI] sr: fix test unit ready responses 2008-02-07 18:02:44 -06:00
sr_vendor.c [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
st.c [SCSI] st: convert to unlocked_ioctl 2008-01-23 11:29:29 -06:00
st.h [SCSI] st: Use mutex instead of semaphore 2007-07-31 10:44:01 -05:00
st_options.h
stex.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
sun3_NCR5380.c [SCSI] atari_NCR5380, sun3_NCR5380: operator precedence fix 2008-01-11 18:28:57 -06:00
sun3_scsi.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
sun3_scsi.h [PATCH] Sun3 SCSI: Make sun3 scsi drivers compile/work again 2006-12-09 09:41:18 -08:00
sun3_scsi_vme.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
sun3x_esp.c [SCSI] sun3x_esp: convert to esp_scsi 2008-02-07 18:02:33 -06:00
sun_esp.c [SCSI] esp: use shost_priv 2007-05-31 17:30:04 -04:00
sym53c416.c [SCSI] sym53c416: fix module parameters 2008-02-12 15:24:58 -06:00
sym53c416.h
t128.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
t128.h [SCSI] scsi: t128 scsi_cmnd convertion 2006-11-15 16:43:50 -06:00
tmscsim.c [SCSI] replace sizeof sense_buffer with SCSI_SENSE_BUFFERSIZE 2008-01-23 11:29:27 -06:00
tmscsim.h [SCSI] tmscsim: Further clean-up of the driver 2007-07-14 18:56:33 -05:00
u14-34f.c [SCSI] u14-34f: fix data direction bug 2008-02-07 18:02:44 -06:00
ultrastor.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
ultrastor.h
wd33c93.c [SCSI] wd33c93: convert to accessors and !use_sg cleanup 2008-01-11 18:22:35 -06:00
wd33c93.h Spelling fix: explicitly 2007-10-19 23:22:55 +02:00
wd7000.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
zalon.c
zorro7xx.c m68k: zorro7xx needs <asm/amigahw.h> 2007-11-29 09:24:52 -08:00