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Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block

Browse Source 
* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block: (63 commits)
  Fix memory leak in dm-crypt
  SPARC64: sg chaining support
  SPARC: sg chaining support
  PPC: sg chaining support
  PS3: sg chaining support
  IA64: sg chaining support
  x86-64: enable sg chaining
  x86-64: update pci-gart iommu to sg helpers
  x86-64: update nommu to sg helpers
  x86-64: update calgary iommu to sg helpers
  swiotlb: sg chaining support
  i386: enable sg chaining
  i386 dma_map_sg: convert to using sg helpers
  mmc: need to zero sglist on init
  Panic in blk_rq_map_sg() from CCISS driver
  remove sglist_len
  remove blk_queue_max_phys_segments in libata
  revert sg segment size ifdefs
  Fixup u14-34f ENABLE_SG_CHAINING
  qla1280: enable use_sg_chaining option
  ...
This commit is contained in:
Linus Torvalds 2007-10-16 10:09:16 -07:00
commit 92d15c2ccb
142 changed files with 1186 additions and 1115 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/DMA-mapping.txt
View File

@ -514,7 +514,7 @@ With scatterlists, you map a region gathered from several regions by:
int i, count = pci_map_sg(dev, sglist, nents, direction);
struct scatterlist *sg;
for (i = 0, sg = sglist; i < count; i++, sg++) {
for_each_sg(sglist, sg, count, i) {
hw_address[i] = sg_dma_address(sg);
hw_len[i] = sg_dma_len(sg);
}
@ -782,5 +782,5 @@ following people:
Jay Estabrook <Jay.Estabrook@compaq.com>
Thomas Sailer <sailer@ife.ee.ethz.ch>
Andrea Arcangeli <andrea@suse.de>
Jens Axboe <axboe@suse.de>
Jens Axboe <jens.axboe@oracle.com>
David Mosberger-Tang <davidm@hpl.hp.com>

2
Documentation/HOWTO
View File

@ -330,7 +330,7 @@ Here is a list of some of the different kernel trees available:
- ACPI development tree, Len Brown <len.brown@intel.com>
git.kernel.org:/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6.git
- Block development tree, Jens Axboe <axboe@suse.de>
- Block development tree, Jens Axboe <jens.axboe@oracle.com>
git.kernel.org:/pub/scm/linux/kernel/git/axboe/linux-2.6-block.git
- DRM development tree, Dave Airlie <airlied@linux.ie>

20
Documentation/block/00-INDEX Normal file
View File

@ -0,0 +1,20 @@
00-INDEX
- This file
as-iosched.txt
- Anticipatory IO scheduler
barrier.txt
- I/O Barriers
biodoc.txt
- Notes on the Generic Block Layer Rewrite in Linux 2.5
capability.txt
- Generic Block Device Capability (/sys/block/<disk>/capability)
deadline-iosched.txt
- Deadline IO scheduler tunables
ioprio.txt
- Block io priorities (in CFQ scheduler)
request.txt
- The members of struct request (in include/linux/blkdev.h)
stat.txt
- Block layer statistics in /sys/block/<dev>/stat
switching-sched.txt
- Switching I/O schedulers at runtime

21
Documentation/block/as-iosched.txt
View File

@ -20,15 +20,10 @@ actually has a head for each physical device in the logical RAID device.
However, setting the antic_expire (see tunable parameters below) produces
very similar behavior to the deadline IO scheduler.
Selecting IO schedulers
-----------------------
To choose IO schedulers at boot time, use the argument 'elevator=deadline'.
'noop', 'as' and 'cfq' (the default) are also available. IO schedulers are
assigned globally at boot time only presently. It's also possible to change
the IO scheduler for a determined device on the fly, as described in
Documentation/block/switching-sched.txt.
Refer to Documentation/block/switching-sched.txt for information on
selecting an io scheduler on a per-device basis.
Anticipatory IO scheduler Policies
----------------------------------
@ -115,7 +110,7 @@ statistics (average think time, average seek distance) on the process
that submitted the just completed request are examined. If it seems
likely that that process will submit another request soon, and that
request is likely to be near the just completed request, then the IO
scheduler will stop dispatching more read requests for up time (antic_expire)
scheduler will stop dispatching more read requests for up to (antic_expire)
milliseconds, hoping that process will submit a new request near the one
that just completed. If such a request is made, then it is dispatched
immediately. If the antic_expire wait time expires, then the IO scheduler
@ -165,3 +160,13 @@ The parameters are:
for big seek time devices though not a linear correspondence - most
processes have only a few ms thinktime.
In addition to the tunables above there is a read-only file named est_time
which, when read, will show:
- The probability of a task exiting without a cooperating task
submitting an anticipated IO.
- The current mean think time.
- The seek distance used to determine if an incoming IO is better.

4
Documentation/block/biodoc.txt
View File

@ -2,7 +2,7 @@
=====================================================
Notes Written on Jan 15, 2002:
Jens Axboe <axboe@suse.de>
Jens Axboe <jens.axboe@oracle.com>
Suparna Bhattacharya <suparna@in.ibm.com>
Last Updated May 2, 2002
@ -21,7 +21,7 @@ Credits:
---------
2.5 bio rewrite:
Jens Axboe <axboe@suse.de>
Jens Axboe <jens.axboe@oracle.com>
Many aspects of the generic block layer redesign were driven by and evolved
over discussions, prior patches and the collective experience of several

25
Documentation/block/deadline-iosched.txt
View File

@ -5,16 +5,10 @@ This little file attempts to document how the deadline io scheduler works.
In particular, it will clarify the meaning of the exposed tunables that may be
of interest to power users.
Each io queue has a set of io scheduler tunables associated with it. These
tunables control how the io scheduler works. You can find these entries
in:
/sys/block/<device>/queue/iosched
assuming that you have sysfs mounted on /sys. If you don't have sysfs mounted,
you can do so by typing:
# mount none /sys -t sysfs
Selecting IO schedulers
-----------------------
Refer to Documentation/block/switching-sched.txt for information on
selecting an io scheduler on a per-device basis.
********************************************************************************
@ -41,14 +35,11 @@ fifo_batch
When a read request expires its deadline, we must move some requests from
the sorted io scheduler list to the block device dispatch queue. fifo_batch
controls how many requests we move, based on the cost of each request. A
request is either qualified as a seek or a stream. The io scheduler knows
the last request that was serviced by the drive (or will be serviced right
before this one). See seek_cost and stream_unit.
controls how many requests we move.
write_starved (number of dispatches)
-------------
writes_starved (number of dispatches)
--------------
When we have to move requests from the io scheduler queue to the block
device dispatch queue, we always give a preference to reads. However, we
@ -73,6 +64,6 @@ that comes at basically 0 cost we leave that on. We simply disable the
rbtree front sector lookup when the io scheduler merge function is called.
Nov 11 2002, Jens Axboe <axboe@suse.de>
Nov 11 2002, Jens Axboe <jens.axboe@oracle.com>

2
Documentation/block/ioprio.txt
View File

@ -180,4 +180,4 @@ int main(int argc, char *argv[])
---> snip ionice.c tool <---
March 11 2005, Jens Axboe <axboe@suse.de>
March 11 2005, Jens Axboe <jens.axboe@oracle.com>

2
Documentation/block/request.txt
View File

@ -1,7 +1,7 @@
struct request documentation
Jens Axboe <axboe@suse.de> 27/05/02
Jens Axboe <jens.axboe@oracle.com> 27/05/02
1.0
Index

21
Documentation/block/switching-sched.txt
View File

@ -1,3 +1,18 @@
To choose IO schedulers at boot time, use the argument 'elevator=deadline'.
'noop', 'as' and 'cfq' (the default) are also available. IO schedulers are
assigned globally at boot time only presently.
Each io queue has a set of io scheduler tunables associated with it. These
tunables control how the io scheduler works. You can find these entries
in:
/sys/block/<device>/queue/iosched
assuming that you have sysfs mounted on /sys. If you don't have sysfs mounted,
you can do so by typing:
# mount none /sys -t sysfs
As of the Linux 2.6.10 kernel, it is now possible to change the
IO scheduler for a given block device on the fly (thus making it possible,
for instance, to set the CFQ scheduler for the system default, but
@ -20,3 +35,9 @@ noop anticipatory deadline [cfq]
# echo anticipatory > /sys/block/hda/queue/scheduler
# cat /sys/block/hda/queue/scheduler
noop [anticipatory] deadline cfq
Each io queue has a set of io scheduler tunables associated with it. These
tunables control how the io scheduler works. You can find these entries
in:
/sys/block/<device>/queue/iosched

14
arch/ia64/hp/common/sba_iommu.c
View File

@ -396,7 +396,7 @@ sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents)
printk(KERN_DEBUG " %d : DMA %08lx/%05x CPU %p\n", nents,
startsg->dma_address, startsg->dma_length,
sba_sg_address(startsg));
startsg++;
startsg = sg_next(startsg);
}
}
@ -409,7 +409,7 @@ sba_check_sg( struct ioc *ioc, struct scatterlist *startsg, int nents)
while (the_nents-- > 0) {
if (sba_sg_address(the_sg) == 0x0UL)
sba_dump_sg(NULL, startsg, nents);
the_sg++;
the_sg = sg_next(the_sg);
}
}
@ -1201,7 +1201,7 @@ sba_fill_pdir(
u32 pide = startsg->dma_address & ~PIDE_FLAG;
dma_offset = (unsigned long) pide & ~iovp_mask;
startsg->dma_address = 0;
dma_sg++;
dma_sg = sg_next(dma_sg);
dma_sg->dma_address = pide | ioc->ibase;
pdirp = &(ioc->pdir_base[pide >> iovp_shift]);
n_mappings++;
@ -1228,7 +1228,7 @@ sba_fill_pdir(
pdirp++;
} while (cnt > 0);
}
startsg++;
startsg = sg_next(startsg);
}
/* force pdir update */
wmb();
@ -1297,7 +1297,7 @@ sba_coalesce_chunks( struct ioc *ioc,
while (--nents > 0) {
unsigned long vaddr; /* tmp */
startsg++;
startsg = sg_next(startsg);
/* PARANOID */
startsg->dma_address = startsg->dma_length = 0;
@ -1407,7 +1407,7 @@ int sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents, int di
#ifdef ALLOW_IOV_BYPASS_SG
ASSERT(to_pci_dev(dev)->dma_mask);
if (likely((ioc->dma_mask & ~to_pci_dev(dev)->dma_mask) == 0)) {
for (sg = sglist ; filled < nents ; filled++, sg++){
for_each_sg(sglist, sg, nents, filled) {
sg->dma_length = sg->length;
sg->dma_address = virt_to_phys(sba_sg_address(sg));
}
@ -1501,7 +1501,7 @@ void sba_unmap_sg (struct device *dev, struct scatterlist *sglist, int nents, in
while (nents && sglist->dma_length) {
sba_unmap_single(dev, sglist->dma_address, sglist->dma_length, dir);
sglist++;
sglist = sg_next(sglist);
nents--;
}

1
arch/ia64/hp/sim/simscsi.c
View File

@ -360,6 +360,7 @@ static struct scsi_host_template driver_template = {
.max_sectors = 1024,
.cmd_per_lun = SIMSCSI_REQ_QUEUE_LEN,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int __init

11
arch/ia64/sn/pci/pci_dma.c
View File

@ -218,16 +218,17 @@ EXPORT_SYMBOL(sn_dma_unmap_single);
*
* Unmap a set of streaming mode DMA translations.
*/
void sn_dma_unmap_sg(struct device *dev, struct scatterlist *sg,
void sn_dma_unmap_sg(struct device *dev, struct scatterlist *sgl,
int nhwentries, int direction)
{
int i;
struct pci_dev *pdev = to_pci_dev(dev);
struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
struct scatterlist *sg;
BUG_ON(dev->bus != &pci_bus_type);
for (i = 0; i < nhwentries; i++, sg++) {
for_each_sg(sgl, sg, nhwentries, i) {
provider->dma_unmap(pdev, sg->dma_address, direction);
sg->dma_address = (dma_addr_t) NULL;
sg->dma_length = 0;
@ -244,11 +245,11 @@ EXPORT_SYMBOL(sn_dma_unmap_sg);
*
* Maps each entry of @sg for DMA.
*/
int sn_dma_map_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
int sn_dma_map_sg(struct device *dev, struct scatterlist *sgl, int nhwentries,
int direction)
{
unsigned long phys_addr;
struct scatterlist *saved_sg = sg;
struct scatterlist *saved_sg = sgl, *sg;
struct pci_dev *pdev = to_pci_dev(dev);
struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
int i;
@ -258,7 +259,7 @@ int sn_dma_map_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
/*
* Setup a DMA address for each entry in the scatterlist.
*/
for (i = 0; i < nhwentries; i++, sg++) {
for_each_sg(sgl, sg, nhwentries, i) {
phys_addr = SG_ENT_PHYS_ADDRESS(sg);
sg->dma_address = provider->dma_map(pdev,
phys_addr, sg->length,

5
arch/powerpc/kernel/dma_64.c
View File

@ -154,12 +154,13 @@ static void dma_direct_unmap_single(struct device *dev, dma_addr_t dma_addr,
{
}
static int dma_direct_map_sg(struct device *dev, struct scatterlist *sg,
static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
int nents, enum dma_data_direction direction)
{
struct scatterlist *sg;
int i;
for (i = 0; i < nents; i++, sg++) {
for_each_sg(sgl, sg, nents, i) {
sg->dma_address = (page_to_phys(sg->page) + sg->offset) |
dma_direct_offset;
sg->dma_length = sg->length;

11
arch/powerpc/kernel/ibmebus.c
View File

@ -87,15 +87,16 @@ static void ibmebus_unmap_single(struct device *dev,
}
static int ibmebus_map_sg(struct device *dev,
struct scatterlist *sg,
struct scatterlist *sgl,
int nents, enum dma_data_direction direction)
{
struct scatterlist *sg;
int i;
for (i = 0; i < nents; i++) {
sg[i].dma_address = (dma_addr_t)page_address(sg[i].page)
+ sg[i].offset;
sg[i].dma_length = sg[i].length;
for_each_sg(sgl, sg, nents, i) {
sg->dma_address = (dma_addr_t)page_address(sg->page)
+ sg->offset;
sg->dma_length = sg->length;
}
return nents;

23
arch/powerpc/kernel/iommu.c
View File

@ -277,7 +277,7 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
dma_addr_t dma_next = 0, dma_addr;
unsigned long flags;
struct scatterlist *s, *outs, *segstart;
int outcount, incount;
int outcount, incount, i;
unsigned long handle;
BUG_ON(direction == DMA_NONE);
@ -297,7 +297,7 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
spin_lock_irqsave(&(tbl->it_lock), flags);
for (s = outs; nelems; nelems--, s++) {
for_each_sg(sglist, s, nelems, i) {
unsigned long vaddr, npages, entry, slen;
slen = s->length;
@ -341,7 +341,8 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
if (novmerge || (dma_addr != dma_next)) {
/* Can't merge: create a new segment */
segstart = s;
outcount++; outs++;
outcount++;
outs = sg_next(outs);
DBG(" can't merge, new segment.\n");
} else {
outs->dma_length += s->length;
@ -374,7 +375,7 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
* next entry of the sglist if we didn't fill the list completely
*/
if (outcount < incount) {
outs++;
outs = sg_next(outs);
outs->dma_address = DMA_ERROR_CODE;
outs->dma_length = 0;
}
@ -385,7 +386,7 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
return outcount;
failure:
for (s = &sglist[0]; s <= outs; s++) {
for_each_sg(sglist, s, nelems, i) {
if (s->dma_length != 0) {
unsigned long vaddr, npages;
@ -395,6 +396,8 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
s->dma_address = DMA_ERROR_CODE;
s->dma_length = 0;
}
if (s == outs)
break;
}
spin_unlock_irqrestore(&(tbl->it_lock), flags);
return 0;
@ -404,6 +407,7 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction)
{
struct scatterlist *sg;
unsigned long flags;
BUG_ON(direction == DMA_NONE);
@ -413,15 +417,16 @@ void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
spin_lock_irqsave(&(tbl->it_lock), flags);
sg = sglist;
while (nelems--) {
unsigned int npages;
dma_addr_t dma_handle = sglist->dma_address;
dma_addr_t dma_handle = sg->dma_address;
if (sglist->dma_length == 0)
if (sg->dma_length == 0)
break;
npages = iommu_num_pages(dma_handle,sglist->dma_length);
npages = iommu_num_pages(dma_handle, sg->dma_length);
__iommu_free(tbl, dma_handle, npages);
sglist++;
sg = sg_next(sg);
}
/* Flush/invalidate TLBs if necessary. As for iommu_free(), we

7
arch/powerpc/platforms/ps3/system-bus.c
View File

@ -616,17 +616,18 @@ static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
}
}
static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction)
static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
int nents, enum dma_data_direction direction)
{
#if defined(CONFIG_PS3_DYNAMIC_DMA)
BUG_ON("do");
return -EPERM;
#else
struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
struct scatterlist *sg;
int i;
for (i = 0; i < nents; i++, sg++) {
for_each_sg(sgl, sg, nents, i) {
int result = ps3_dma_map(dev->d_region,
page_to_phys(sg->page) + sg->offset, sg->length,
&sg->dma_address, 0);

25
arch/sparc/kernel/ioport.c
View File

@ -35,6 +35,7 @@
#include <linux/slab.h>
#include <linux/pci.h> /* struct pci_dev */
#include <linux/proc_fs.h>
#include <linux/scatterlist.h>
#include <asm/io.h>
#include <asm/vaddrs.h>
@ -717,19 +718,19 @@ void pci_unmap_page(struct pci_dev *hwdev,
* Device ownership issues as mentioned above for pci_map_single are
* the same here.
*/
int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
int direction)
{
struct scatterlist *sg;
int n;
BUG_ON(direction == PCI_DMA_NONE);
/* IIep is write-through, not flushing. */
for (n = 0; n < nents; n++) {
for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg->page) == NULL);
sg->dvma_address =
virt_to_phys(page_address(sg->page)) + sg->offset;
sg->dvma_length = sg->length;
sg++;
}
return nents;
}
@ -738,19 +739,19 @@ int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
* Again, cpu read rules concerning calls here are the same as for
* pci_unmap_single() above.
*/
void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
int direction)
{
struct scatterlist *sg;
int n;
BUG_ON(direction == PCI_DMA_NONE);
if (direction != PCI_DMA_TODEVICE) {
for (n = 0; n < nents; n++) {
for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg->page) == NULL);
mmu_inval_dma_area(
(unsigned long) page_address(sg->page),
(sg->length + PAGE_SIZE-1) & PAGE_MASK);
sg++;
}
}
}
@ -789,34 +790,34 @@ void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t ba, size_t
* The same as pci_dma_sync_single_* but for a scatter-gather list,
* same rules and usage.
*/
void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction)
void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction)
{
struct scatterlist *sg;
int n;
BUG_ON(direction == PCI_DMA_NONE);
if (direction != PCI_DMA_TODEVICE) {
for (n = 0; n < nents; n++) {
for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg->page) == NULL);
mmu_inval_dma_area(
(unsigned long) page_address(sg->page),
(sg->length + PAGE_SIZE-1) & PAGE_MASK);
sg++;
}
}
}
void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction)
void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction)
{
struct scatterlist *sg;
int n;
BUG_ON(direction == PCI_DMA_NONE);
if (direction != PCI_DMA_TODEVICE) {
for (n = 0; n < nents; n++) {
for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg->page) == NULL);
mmu_inval_dma_area(
(unsigned long) page_address(sg->page),
(sg->length + PAGE_SIZE-1) & PAGE_MASK);
sg++;
}
}
}

12
arch/sparc/mm/io-unit.c
View File

@ -11,8 +11,8 @@
#include <linux/mm.h>
#include <linux/highmem.h> /* pte_offset_map => kmap_atomic */
#include <linux/bitops.h>
#include <linux/scatterlist.h>
#include <asm/scatterlist.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/sbus.h>
@ -144,8 +144,9 @@ static void iounit_get_scsi_sgl(struct scatterlist *sg, int sz, struct sbus_bus
spin_lock_irqsave(&iounit->lock, flags);
while (sz != 0) {
--sz;
sg[sz].dvma_address = iounit_get_area(iounit, (unsigned long)page_address(sg[sz].page) + sg[sz].offset, sg[sz].length);
sg[sz].dvma_length = sg[sz].length;
sg->dvma_address = iounit_get_area(iounit, (unsigned long)page_address(sg->page) + sg->offset, sg->length);
sg->dvma_length = sg->length;
sg = sg_next(sg);
}
spin_unlock_irqrestore(&iounit->lock, flags);
}
@ -173,11 +174,12 @@ static void iounit_release_scsi_sgl(struct scatterlist *sg, int sz, struct sbus_
spin_lock_irqsave(&iounit->lock, flags);
while (sz != 0) {
--sz;
len = ((sg[sz].dvma_address & ~PAGE_MASK) + sg[sz].length + (PAGE_SIZE-1)) >> PAGE_SHIFT;
vaddr = (sg[sz].dvma_address - IOUNIT_DMA_BASE) >> PAGE_SHIFT;
len = ((sg->dvma_address & ~PAGE_MASK) + sg->length + (PAGE_SIZE-1)) >> PAGE_SHIFT;
vaddr = (sg->dvma_address - IOUNIT_DMA_BASE) >> PAGE_SHIFT;
IOD(("iounit_release %08lx-%08lx\n", (long)vaddr, (long)len+vaddr));
for (len += vaddr; vaddr < len; vaddr++)
clear_bit(vaddr, iounit->bmap);
sg = sg_next(sg);
}
spin_unlock_irqrestore(&iounit->lock, flags);
}

10
arch/sparc/mm/iommu.c
View File

@ -12,8 +12,8 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/highmem.h> /* pte_offset_map => kmap_atomic */
#include <linux/scatterlist.h>
#include <asm/scatterlist.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/sbus.h>
@ -240,7 +240,7 @@ static void iommu_get_scsi_sgl_noflush(struct scatterlist *sg, int sz, struct sb
n = (sg->length + sg->offset + PAGE_SIZE-1) >> PAGE_SHIFT;
sg->dvma_address = iommu_get_one(sg->page, n, sbus) + sg->offset;
sg->dvma_length = (__u32) sg->length;
sg++;
sg = sg_next(sg);
}
}
@ -254,7 +254,7 @@ static void iommu_get_scsi_sgl_gflush(struct scatterlist *sg, int sz, struct sbu
n = (sg->length + sg->offset + PAGE_SIZE-1) >> PAGE_SHIFT;
sg->dvma_address = iommu_get_one(sg->page, n, sbus) + sg->offset;
sg->dvma_length = (__u32) sg->length;
sg++;
sg = sg_next(sg);
}
}
@ -285,7 +285,7 @@ static void iommu_get_scsi_sgl_pflush(struct scatterlist *sg, int sz, struct sbu
sg->dvma_address = iommu_get_one(sg->page, n, sbus) + sg->offset;
sg->dvma_length = (__u32) sg->length;
sg++;
sg = sg_next(sg);
}
}
@ -325,7 +325,7 @@ static void iommu_release_scsi_sgl(struct scatterlist *sg, int sz, struct sbus_b
n = (sg->length + sg->offset + PAGE_SIZE-1) >> PAGE_SHIFT;
iommu_release_one(sg->dvma_address & PAGE_MASK, n, sbus);
sg->dvma_address = 0x21212121;
sg++;
sg = sg_next(sg);
}
}

10
arch/sparc/mm/sun4c.c
View File

@ -17,8 +17,8 @@
#include <linux/highmem.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/scatterlist.h>
#include <asm/scatterlist.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
@ -1228,8 +1228,9 @@ static void sun4c_get_scsi_sgl(struct scatterlist *sg, int sz, struct sbus_bus *
{
while (sz != 0) {
--sz;
sg[sz].dvma_address = (__u32)sun4c_lockarea(page_address(sg[sz].page) + sg[sz].offset, sg[sz].length);
sg[sz].dvma_length = sg[sz].length;
sg->dvma_address = (__u32)sun4c_lockarea(page_address(sg->page) + sg->offset, sg->length);
sg->dvma_length = sg->length;
sg = sg_next(sg);
}
}
@ -1244,7 +1245,8 @@ static void sun4c_release_scsi_sgl(struct scatterlist *sg, int sz, struct sbus_b
{
while (sz != 0) {
--sz;
sun4c_unlockarea((char *)sg[sz].dvma_address, sg[sz].length);
sun4c_unlockarea((char *)sg->dvma_address, sg->length);
sg = sg_next(sg);
}
}

39
arch/sparc64/kernel/iommu.c
View File

@ -10,6 +10,7 @@
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/scatterlist.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
@ -480,7 +481,7 @@ static inline void fill_sg(iopte_t *iopte, struct scatterlist *sg,
unsigned long iopte_protection)
{
struct scatterlist *dma_sg = sg;
struct scatterlist *sg_end = sg + nelems;
struct scatterlist *sg_end = sg_last(sg, nelems);
int i;
for (i = 0; i < nused; i++) {
@ -515,7 +516,7 @@ static inline void fill_sg(iopte_t *iopte, struct scatterlist *sg,
len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
break;
}
sg++;
sg = sg_next(sg);
}
pteval = iopte_protection | (pteval & IOPTE_PAGE);
@ -528,24 +529,24 @@ static inline void fill_sg(iopte_t *iopte, struct scatterlist *sg,
}
pteval = (pteval & IOPTE_PAGE) + len;
sg++;
sg = sg_next(sg);
/* Skip over any tail mappings we've fully mapped,
* adjusting pteval along the way. Stop when we
* detect a page crossing event.
*/
while (sg < sg_end &&
while (sg != sg_end &&
(pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
(pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
((pteval ^
(SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
pteval += sg->length;
sg++;
sg = sg_next(sg);
}
if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
pteval = ~0UL;
} while (dma_npages != 0);
dma_sg++;
dma_sg = sg_next(dma_sg);
}
}
@ -606,7 +607,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
sgtmp = sglist;
while (used && sgtmp->dma_length) {
sgtmp->dma_address += dma_base;
sgtmp++;
sgtmp = sg_next(sgtmp);
used--;
}
used = nelems - used;
@ -642,6 +643,7 @@ static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
struct strbuf *strbuf;
iopte_t *base;
unsigned long flags, ctx, i, npages;
struct scatterlist *sg, *sgprv;
u32 bus_addr;
if (unlikely(direction == DMA_NONE)) {
@ -654,11 +656,14 @@ static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
bus_addr = sglist->dma_address & IO_PAGE_MASK;
for (i = 1; i < nelems; i++)
if (sglist[i].dma_length == 0)
sgprv = NULL;
for_each_sg(sglist, sg, nelems, i) {
if (sg->dma_length == 0)
break;
i--;
npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length) -
sgprv = sg;
}
npages = (IO_PAGE_ALIGN(sgprv->dma_address + sgprv->dma_length) -
bus_addr) >> IO_PAGE_SHIFT;
base = iommu->page_table +
@ -730,6 +735,7 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev,
struct iommu *iommu;
struct strbuf *strbuf;
unsigned long flags, ctx, npages, i;
struct scatterlist *sg, *sgprv;
u32 bus_addr;
iommu = dev->archdata.iommu;
@ -753,11 +759,14 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev,
/* Step 2: Kick data out of streaming buffers. */
bus_addr = sglist[0].dma_address & IO_PAGE_MASK;
for(i = 1; i < nelems; i++)
if (!sglist[i].dma_length)
sgprv = NULL;
for_each_sg(sglist, sg, nelems, i) {
if (sg->dma_length == 0)
break;
i--;
npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length)
sgprv = sg;
}
npages = (IO_PAGE_ALIGN(sgprv->dma_address + sgprv->dma_length)
- bus_addr) >> IO_PAGE_SHIFT;
strbuf_flush(strbuf, iommu, bus_addr, ctx, npages, direction);

32
arch/sparc64/kernel/pci_sun4v.c
View File

@ -13,6 +13,7 @@
#include <linux/irq.h>
#include <linux/msi.h>
#include <linux/log2.h>
#include <linux/scatterlist.h>
#include <asm/iommu.h>
#include <asm/irq.h>
@ -373,7 +374,7 @@ static inline long fill_sg(long entry, struct device *dev,
int nused, int nelems, unsigned long prot)
{
struct scatterlist *dma_sg = sg;
struct scatterlist *sg_end = sg + nelems;
struct scatterlist *sg_end = sg_last(sg, nelems);
unsigned long flags;
int i;
@ -413,7 +414,7 @@ static inline long fill_sg(long entry, struct device *dev,
len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
break;
}
sg++;
sg = sg_next(sg);
}
pteval = (pteval & IOPTE_PAGE);
@ -431,24 +432,25 @@ static inline long fill_sg(long entry, struct device *dev,
}
pteval = (pteval & IOPTE_PAGE) + len;
sg++;
sg = sg_next(sg);
/* Skip over any tail mappings we've fully mapped,
* adjusting pteval along the way. Stop when we
* detect a page crossing event.
*/
while (sg < sg_end &&
(pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
while ((pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
(pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
((pteval ^
(SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
pteval += sg->length;
sg++;
if (sg == sg_end)
break;
sg = sg_next(sg);
}
if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
pteval = ~0UL;
} while (dma_npages != 0);
dma_sg++;
dma_sg = sg_next(dma_sg);
}
if (unlikely(iommu_batch_end() < 0L))
@ -510,7 +512,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
sgtmp = sglist;
while (used && sgtmp->dma_length) {
sgtmp->dma_address += dma_base;
sgtmp++;
sgtmp = sg_next(sgtmp);
used--;
}
used = nelems - used;
@ -545,6 +547,7 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
struct pci_pbm_info *pbm;
struct iommu *iommu;
unsigned long flags, i, npages;
struct scatterlist *sg, *sgprv;
long entry;
u32 devhandle, bus_addr;
@ -558,12 +561,15 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
devhandle = pbm->devhandle;
bus_addr = sglist->dma_address & IO_PAGE_MASK;
for (i = 1; i < nelems; i++)
if (sglist[i].dma_length == 0)
sgprv = NULL;
for_each_sg(sglist, sg, nelems, i) {
if (sg->dma_length == 0)
break;
i--;
npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length) -
sgprv = sg;
}
npages = (IO_PAGE_ALIGN(sgprv->dma_address + sgprv->dma_length) -
bus_addr) >> IO_PAGE_SHIFT;
entry = ((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);

24
arch/x86/kernel/pci-calgary_64.c
View File

@ -35,6 +35,7 @@
#include <linux/pci_ids.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/scatterlist.h>
#include <asm/iommu.h>
#include <asm/calgary.h>
#include <asm/tce.h>
@ -384,31 +385,32 @@ static void calgary_unmap_sg(struct device *dev,
struct scatterlist *sglist, int nelems, int direction)
{
struct iommu_table *tbl = find_iommu_table(dev);
struct scatterlist *s;
int i;
if (!translate_phb(to_pci_dev(dev)))
return;
while (nelems--) {
for_each_sg(sglist, s, nelems, i) {
unsigned int npages;
dma_addr_t dma = sglist->dma_address;
unsigned int dmalen = sglist->dma_length;
dma_addr_t dma = s->dma_address;
unsigned int dmalen = s->dma_length;
if (dmalen == 0)
break;
npages = num_dma_pages(dma, dmalen);
iommu_free(tbl, dma, npages);
sglist++;
}
}
static int calgary_nontranslate_map_sg(struct device* dev,
struct scatterlist *sg, int nelems, int direction)
{
struct scatterlist *s;
int i;
for (i = 0; i < nelems; i++ ) {
struct scatterlist *s = &sg[i];
for_each_sg(sg, s, nelems, i) {
BUG_ON(!s->page);
s->dma_address = virt_to_bus(page_address(s->page) +s->offset);
s->dma_length = s->length;
@ -420,6 +422,7 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
int nelems, int direction)
{
struct iommu_table *tbl = find_iommu_table(dev);
struct scatterlist *s;
unsigned long vaddr;
unsigned int npages;
unsigned long entry;
@ -428,8 +431,7 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
if (!translate_phb(to_pci_dev(dev)))
return calgary_nontranslate_map_sg(dev, sg, nelems, direction);
for (i = 0; i < nelems; i++ ) {
struct scatterlist *s = &sg[i];
for_each_sg(sg, s, nelems, i) {
BUG_ON(!s->page);
vaddr = (unsigned long)page_address(s->page) + s->offset;
@ -454,9 +456,9 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
return nelems;
error:
calgary_unmap_sg(dev, sg, nelems, direction);
for (i = 0; i < nelems; i++) {
sg[i].dma_address = bad_dma_address;
sg[i].dma_length = 0;
for_each_sg(sg, s, nelems, i) {
sg->dma_address = bad_dma_address;
sg->dma_length = 0;
}
return 0;
}

65
arch/x86/kernel/pci-gart_64.c
View File

@ -23,6 +23,7 @@
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/kdebug.h>
#include <linux/scatterlist.h>
#include <asm/atomic.h>
#include <asm/io.h>
#include <asm/mtrr.h>
@ -278,10 +279,10 @@ static void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
*/
static void gart_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
{
struct scatterlist *s;
int i;
for (i = 0; i < nents; i++) {
struct scatterlist *s = &sg[i];
for_each_sg(sg, s, nents, i) {
if (!s->dma_length || !s->length)
break;
gart_unmap_single(dev, s->dma_address, s->dma_length, dir);
@ -292,14 +293,14 @@ static void gart_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
static int dma_map_sg_nonforce(struct device *dev, struct scatterlist *sg,
int nents, int dir)
{
struct scatterlist *s;
int i;
#ifdef CONFIG_IOMMU_DEBUG
printk(KERN_DEBUG "dma_map_sg overflow\n");
#endif
for (i = 0; i < nents; i++ ) {
struct scatterlist *s = &sg[i];
for_each_sg(sg, s, nents, i) {
unsigned long addr = page_to_phys(s->page) + s->offset;
if (nonforced_iommu(dev, addr, s->length)) {
addr = dma_map_area(dev, addr, s->length, dir);
@ -319,23 +320,23 @@ static int dma_map_sg_nonforce(struct device *dev, struct scatterlist *sg,
}
/* Map multiple scatterlist entries continuous into the first. */
static int __dma_map_cont(struct scatterlist *sg, int start, int stopat,
static int __dma_map_cont(struct scatterlist *start, int nelems,
struct scatterlist *sout, unsigned long pages)
{
unsigned long iommu_start = alloc_iommu(pages);
unsigned long iommu_page = iommu_start;
struct scatterlist *s;
int i;
if (iommu_start == -1)
return -1;
for (i = start; i < stopat; i++) {
struct scatterlist *s = &sg[i];
for_each_sg(start, s, nelems, i) {
unsigned long pages, addr;
unsigned long phys_addr = s->dma_address;
BUG_ON(i > start && s->offset);
if (i == start) {
BUG_ON(s != start && s->offset);
if (s == start) {
*sout = *s;
sout->dma_address = iommu_bus_base;
sout->dma_address += iommu_page*PAGE_SIZE + s->offset;
@ -357,17 +358,17 @@ static int __dma_map_cont(struct scatterlist *sg, int start, int stopat,
return 0;
}
static inline int dma_map_cont(struct scatterlist *sg, int start, int stopat,
static inline int dma_map_cont(struct scatterlist *start, int nelems,
struct scatterlist *sout,
unsigned long pages, int need)
{
if (!need) {
BUG_ON(stopat - start != 1);
*sout = sg[start];
sout->dma_length = sg[start].length;
if (!need) {
BUG_ON(nelems != 1);
*sout = *start;
sout->dma_length = start->length;
return 0;
}
return __dma_map_cont(sg, start, stopat, sout, pages);
}
return __dma_map_cont(start, nelems, sout, pages);
}
/*
@ -381,6 +382,7 @@ int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
int start;
unsigned long pages = 0;
int need = 0, nextneed;
struct scatterlist *s, *ps, *start_sg, *sgmap;
if (nents == 0)
return 0;
@ -390,8 +392,9 @@ int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
out = 0;
start = 0;
for (i = 0; i < nents; i++) {
struct scatterlist *s = &sg[i];
start_sg = sgmap = sg;
ps = NULL; /* shut up gcc */
for_each_sg(sg, s, nents, i) {
dma_addr_t addr = page_to_phys(s->page) + s->offset;
s->dma_address = addr;
BUG_ON(s->length == 0);
@ -400,29 +403,33 @@ int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
/* Handle the previous not yet processed entries */
if (i > start) {
struct scatterlist *ps = &sg[i-1];
/* Can only merge when the last chunk ends on a page
boundary and the new one doesn't have an offset. */
if (!iommu_merge || !nextneed || !need || s->offset ||
(ps->offset + ps->length) % PAGE_SIZE) {
if (dma_map_cont(sg, start, i, sg+out, pages,
need) < 0)
(ps->offset + ps->length) % PAGE_SIZE) {
if (dma_map_cont(start_sg, i - start, sgmap,
pages, need) < 0)
goto error;
out++;
sgmap = sg_next(sgmap);
pages = 0;
start = i;
start = i;
start_sg = s;
}
}
need = nextneed;
pages += to_pages(s->offset, s->length);
ps = s;
}
if (dma_map_cont(sg, start, i, sg+out, pages, need) < 0)
if (dma_map_cont(start_sg, i - start, sgmap, pages, need) < 0)
goto error;
out++;
flush_gart();
if (out < nents)
sg[out].dma_length = 0;
if (out < nents) {
sgmap = sg_next(sgmap);
sgmap->dma_length = 0;
}
return out;
error:
@ -437,8 +444,8 @@ error:
if (panic_on_overflow)
panic("dma_map_sg: overflow on %lu pages\n", pages);
iommu_full(dev, pages << PAGE_SHIFT, dir);
for (i = 0; i < nents; i++)
sg[i].dma_address = bad_dma_address;
for_each_sg(sg, s, nents, i)
s->dma_address = bad_dma_address;
return 0;
}

5
arch/x86/kernel/pci-nommu_64.c
View File

@ -5,6 +5,7 @@
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <asm/iommu.h>
#include <asm/processor.h>
@ -57,10 +58,10 @@ static void nommu_unmap_single(struct device *dev, dma_addr_t addr,size_t size,
static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg,
int nents, int direction)
{
struct scatterlist *s;
int i;
for (i = 0; i < nents; i++ ) {
struct scatterlist *s = &sg[i];
for_each_sg(sg, s, nents, i) {
BUG_ON(!s->page);
s->dma_address = virt_to_bus(page_address(s->page) +s->offset);
if (!check_addr("map_sg", hwdev, s->dma_address, s->length))

2
block/bsg.c
View File

@ -908,7 +908,7 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
}
}
static struct file_operations bsg_fops = {
static const struct file_operations bsg_fops = {
.read = bsg_read,
.write = bsg_write,
.poll = bsg_poll,

17
block/elevator.c
View File

@ -712,6 +712,14 @@ struct request *elv_next_request(struct request_queue *q)
int ret;
while ((rq = __elv_next_request(q)) != NULL) {
/*
* Kill the empty barrier place holder, the driver must
* not ever see it.
*/
if (blk_empty_barrier(rq)) {
end_queued_request(rq, 1);
continue;
}
if (!(rq->cmd_flags & REQ_STARTED)) {
/*
* This is the first time the device driver
@ -751,15 +759,8 @@ struct request *elv_next_request(struct request_queue *q)
rq = NULL;
break;
} else if (ret == BLKPREP_KILL) {
int nr_bytes = rq->hard_nr_sectors << 9;
if (!nr_bytes)
nr_bytes = rq->data_len;
blkdev_dequeue_request(rq);
rq->cmd_flags |= REQ_QUIET;
end_that_request_chunk(rq, 0, nr_bytes);
end_that_request_last(rq, 0);
end_queued_request(rq, 0);
} else {
printk(KERN_ERR "%s: bad return=%d\n", __FUNCTION__,
ret);

311
block/ll_rw_blk.c
View File

@ -30,6 +30,7 @@
#include <linux/cpu.h>
#include <linux/blktrace_api.h>
#include <linux/fault-inject.h>
#include <linux/scatterlist.h>
/*
* for max sense size
@ -304,23 +305,6 @@ int blk_queue_ordered(struct request_queue *q, unsigned ordered,
EXPORT_SYMBOL(blk_queue_ordered);
/**
* blk_queue_issue_flush_fn - set function for issuing a flush
* @q: the request queue
* @iff: the function to be called issuing the flush
*
* Description:
* If a driver supports issuing a flush command, the support is notified
* to the block layer by defining it through this call.
*
**/
void blk_queue_issue_flush_fn(struct request_queue *q, issue_flush_fn *iff)
{
q->issue_flush_fn = iff;
}
EXPORT_SYMBOL(blk_queue_issue_flush_fn);
/*
* Cache flushing for ordered writes handling
*/
@ -377,10 +361,12 @@ void blk_ordered_complete_seq(struct request_queue *q, unsigned seq, int error)
/*
* Okay, sequence complete.
*/
rq = q->orig_bar_rq;
uptodate = q->orderr ? q->orderr : 1;
uptodate = 1;
if (q->orderr)
uptodate = q->orderr;
q->ordseq = 0;
rq = q->orig_bar_rq;
end_that_request_first(rq, uptodate, rq->hard_nr_sectors);
end_that_request_last(rq, uptodate);
@ -445,7 +431,8 @@ static inline struct request *start_ordered(struct request_queue *q,
rq_init(q, rq);
if (bio_data_dir(q->orig_bar_rq->bio) == WRITE)
rq->cmd_flags |= REQ_RW;
rq->cmd_flags |= q->ordered & QUEUE_ORDERED_FUA ? REQ_FUA : 0;
if (q->ordered & QUEUE_ORDERED_FUA)
rq->cmd_flags |= REQ_FUA;
rq->elevator_private = NULL;
rq->elevator_private2 = NULL;
init_request_from_bio(rq, q->orig_bar_rq->bio);
@ -455,9 +442,12 @@ static inline struct request *start_ordered(struct request_queue *q,
* Queue ordered sequence. As we stack them at the head, we
* need to queue in reverse order. Note that we rely on that
* no fs request uses ELEVATOR_INSERT_FRONT and thus no fs
* request gets inbetween ordered sequence.
* request gets inbetween ordered sequence. If this request is
* an empty barrier, we don't need to do a postflush ever since
* there will be no data written between the pre and post flush.
* Hence a single flush will suffice.
*/
if (q->ordered & QUEUE_ORDERED_POSTFLUSH)
if ((q->ordered & QUEUE_ORDERED_POSTFLUSH) && !blk_empty_barrier(rq))
queue_flush(q, QUEUE_ORDERED_POSTFLUSH);
else
q->ordseq |= QUEUE_ORDSEQ_POSTFLUSH;
@ -481,7 +471,7 @@ static inline struct request *start_ordered(struct request_queue *q,
int blk_do_ordered(struct request_queue *q, struct request **rqp)
{
struct request *rq = *rqp;
int is_barrier = blk_fs_request(rq) && blk_barrier_rq(rq);
const int is_barrier = blk_fs_request(rq) && blk_barrier_rq(rq);
if (!q->ordseq) {
if (!is_barrier)
@ -1329,9 +1319,10 @@ static int blk_hw_contig_segment(struct request_queue *q, struct bio *bio,
* must make sure sg can hold rq->nr_phys_segments entries
*/
int blk_rq_map_sg(struct request_queue *q, struct request *rq,
struct scatterlist *sg)
struct scatterlist *sglist)
{
struct bio_vec *bvec, *bvprv;
struct scatterlist *next_sg, *sg;
struct req_iterator iter;
int nsegs, cluster;
@ -1342,11 +1333,12 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq,
* for each bio in rq
*/
bvprv = NULL;
sg = next_sg = &sglist[0];
rq_for_each_segment(bvec, rq, iter) {
int nbytes = bvec->bv_len;
if (bvprv && cluster) {
if (sg[nsegs - 1].length + nbytes > q->max_segment_size)
if (sg->length + nbytes > q->max_segment_size)
goto new_segment;
if (!BIOVEC_PHYS_MERGEABLE(bvprv, bvec))
@ -1354,14 +1346,15 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq,
if (!BIOVEC_SEG_BOUNDARY(q, bvprv, bvec))
goto new_segment;
sg[nsegs - 1].length += nbytes;
sg->length += nbytes;
} else {
new_segment:
memset(&sg[nsegs],0,sizeof(struct scatterlist));
sg[nsegs].page = bvec->bv_page;
sg[nsegs].length = nbytes;
sg[nsegs].offset = bvec->bv_offset;
sg = next_sg;
next_sg = sg_next(sg);
sg->page = bvec->bv_page;
sg->length = nbytes;
sg->offset = bvec->bv_offset;
nsegs++;
}
bvprv = bvec;
@ -2660,6 +2653,14 @@ int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
EXPORT_SYMBOL(blk_execute_rq);
static void bio_end_empty_barrier(struct bio *bio, int err)
{
if (err)
clear_bit(BIO_UPTODATE, &bio->bi_flags);
complete(bio->bi_private);
}
/**
* blkdev_issue_flush - queue a flush
* @bdev: blockdev to issue flush for
@ -2672,7 +2673,10 @@ EXPORT_SYMBOL(blk_execute_rq);
*/
int blkdev_issue_flush(struct block_device *bdev, sector_t *error_sector)
{
DECLARE_COMPLETION_ONSTACK(wait);
struct request_queue *q;
struct bio *bio;
int ret;
if (bdev->bd_disk == NULL)
return -ENXIO;
@ -2680,10 +2684,32 @@ int blkdev_issue_flush(struct block_device *bdev, sector_t *error_sector)
q = bdev_get_queue(bdev);
if (!q)
return -ENXIO;
if (!q->issue_flush_fn)
return -EOPNOTSUPP;
return q->issue_flush_fn(q, bdev->bd_disk, error_sector);
bio = bio_alloc(GFP_KERNEL, 0);
if (!bio)
return -ENOMEM;
bio->bi_end_io = bio_end_empty_barrier;
bio->bi_private = &wait;
bio->bi_bdev = bdev;
submit_bio(1 << BIO_RW_BARRIER, bio);
wait_for_completion(&wait);
/*
* The driver must store the error location in ->bi_sector, if
* it supports it. For non-stacked drivers, this should be copied
* from rq->sector.
*/
if (error_sector)
*error_sector = bio->bi_sector;
ret = 0;
if (!bio_flagged(bio, BIO_UPTODATE))
ret = -EIO;
bio_put(bio);
return ret;
}
EXPORT_SYMBOL(blkdev_issue_flush);
@ -3051,7 +3077,7 @@ static inline void blk_partition_remap(struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
if (bdev != bdev->bd_contains) {
if (bio_sectors(bio) && bdev != bdev->bd_contains) {
struct hd_struct *p = bdev->bd_part;
const int rw = bio_data_dir(bio);
@ -3117,6 +3143,35 @@ static inline int should_fail_request(struct bio *bio)
#endif /* CONFIG_FAIL_MAKE_REQUEST */
/*
* Check whether this bio extends beyond the end of the device.
*/
static inline int bio_check_eod(struct bio *bio, unsigned int nr_sectors)
{
sector_t maxsector;
if (!nr_sectors)
return 0;
/* Test device or partition size, when known. */
maxsector = bio->bi_bdev->bd_inode->i_size >> 9;
if (maxsector) {
sector_t sector = bio->bi_sector;
if (maxsector < nr_sectors || maxsector - nr_sectors < sector) {
/*
* This may well happen - the kernel calls bread()
* without checking the size of the device, e.g., when
* mounting a device.
*/
handle_bad_sector(bio);
return 1;
}
}
return 0;
}
/**
* generic_make_request: hand a buffer to its device driver for I/O
* @bio: The bio describing the location in memory and on the device.
@ -3144,27 +3199,14 @@ static inline int should_fail_request(struct bio *bio)
static inline void __generic_make_request(struct bio *bio)
{
struct request_queue *q;
sector_t maxsector;
sector_t old_sector;
int ret, nr_sectors = bio_sectors(bio);
dev_t old_dev;
might_sleep();
/* Test device or partition size, when known. */
maxsector = bio->bi_bdev->bd_inode->i_size >> 9;
if (maxsector) {
sector_t sector = bio->bi_sector;
if (maxsector < nr_sectors || maxsector - nr_sectors < sector) {
/*
* This may well happen - the kernel calls bread()
* without checking the size of the device, e.g., when
* mounting a device.
*/
handle_bad_sector(bio);
goto end_io;
}
}
if (bio_check_eod(bio, nr_sectors))
goto end_io;
/*
* Resolve the mapping until finished. (drivers are
@ -3191,7 +3233,7 @@ end_io:
break;
}
if (unlikely(bio_sectors(bio) > q->max_hw_sectors)) {
if (unlikely(nr_sectors > q->max_hw_sectors)) {
printk("bio too big device %s (%u > %u)\n",
bdevname(bio->bi_bdev, b),
bio_sectors(bio),
@ -3212,7 +3254,7 @@ end_io:
blk_partition_remap(bio);
if (old_sector != -1)
blk_add_trace_remap(q, bio, old_dev, bio->bi_sector,
blk_add_trace_remap(q, bio, old_dev, bio->bi_sector,
old_sector);
blk_add_trace_bio(q, bio, BLK_TA_QUEUE);
@ -3220,21 +3262,8 @@ end_io:
old_sector = bio->bi_sector;
old_dev = bio->bi_bdev->bd_dev;
maxsector = bio->bi_bdev->bd_inode->i_size >> 9;
if (maxsector) {
sector_t sector = bio->bi_sector;
if (maxsector < nr_sectors ||
maxsector - nr_sectors < sector) {
/*
* This may well happen - partitions are not
* checked to make sure they are within the size
* of the whole device.
*/
handle_bad_sector(bio);
goto end_io;
}
}
if (bio_check_eod(bio, nr_sectors))
goto end_io;
ret = q->make_request_fn(q, bio);
} while (ret);
@ -3307,23 +3336,32 @@ void submit_bio(int rw, struct bio *bio)
{
int count = bio_sectors(bio);
BIO_BUG_ON(!bio->bi_size);
BIO_BUG_ON(!bio->bi_io_vec);
bio->bi_rw |= rw;
if (rw & WRITE) {
count_vm_events(PGPGOUT, count);
} else {
task_io_account_read(bio->bi_size);
count_vm_events(PGPGIN, count);
}
if (unlikely(block_dump)) {
char b[BDEVNAME_SIZE];
printk(KERN_DEBUG "%s(%d): %s block %Lu on %s\n",
current->comm, current->pid,
(rw & WRITE) ? "WRITE" : "READ",
(unsigned long long)bio->bi_sector,
bdevname(bio->bi_bdev,b));
/*
* If it's a regular read/write or a barrier with data attached,
* go through the normal accounting stuff before submission.
*/
if (!bio_empty_barrier(bio)) {
BIO_BUG_ON(!bio->bi_size);
BIO_BUG_ON(!bio->bi_io_vec);
if (rw & WRITE) {
count_vm_events(PGPGOUT, count);
} else {
task_io_account_read(bio->bi_size);
count_vm_events(PGPGIN, count);
}
if (unlikely(block_dump)) {
char b[BDEVNAME_SIZE];
printk(KERN_DEBUG "%s(%d): %s block %Lu on %s\n",
current->comm, current->pid,
(rw & WRITE) ? "WRITE" : "READ",
(unsigned long long)bio->bi_sector,
bdevname(bio->bi_bdev,b));
}
}
generic_make_request(bio);
@ -3399,6 +3437,14 @@ static int __end_that_request_first(struct request *req, int uptodate,
while ((bio = req->bio) != NULL) {
int nbytes;
/*
* For an empty barrier request, the low level driver must
* store a potential error location in ->sector. We pass
* that back up in ->bi_sector.
*/
if (blk_empty_barrier(req))
bio->bi_sector = req->sector;
if (nr_bytes >= bio->bi_size) {
req->bio = bio->bi_next;
nbytes = bio->bi_size;
@ -3564,7 +3610,7 @@ static struct notifier_block blk_cpu_notifier __cpuinitdata = {
* Description:
* Ends all I/O on a request. It does not handle partial completions,
* unless the driver actually implements this in its completion callback
* through requeueing. Theh actual completion happens out-of-order,
* through requeueing. The actual completion happens out-of-order,
* through a softirq handler. The user must have registered a completion
* callback through blk_queue_softirq_done().
**/
@ -3627,15 +3673,83 @@ void end_that_request_last(struct request *req, int uptodate)
EXPORT_SYMBOL(end_that_request_last);
void end_request(struct request *req, int uptodate)
static inline void __end_request(struct request *rq, int uptodate,
unsigned int nr_bytes, int dequeue)
{
if (!end_that_request_first(req, uptodate, req->hard_cur_sectors)) {
add_disk_randomness(req->rq_disk);
blkdev_dequeue_request(req);
end_that_request_last(req, uptodate);
if (!end_that_request_chunk(rq, uptodate, nr_bytes)) {
if (dequeue)
blkdev_dequeue_request(rq);
add_disk_randomness(rq->rq_disk);
end_that_request_last(rq, uptodate);
}
}
static unsigned int rq_byte_size(struct request *rq)
{
if (blk_fs_request(rq))
return rq->hard_nr_sectors << 9;
return rq->data_len;
}
/**
* end_queued_request - end all I/O on a queued request
* @rq: the request being processed
* @uptodate: error value or 0/1 uptodate flag
*
* Description:
* Ends all I/O on a request, and removes it from the block layer queues.
* Not suitable for normal IO completion, unless the driver still has
* the request attached to the block layer.
*
**/
void end_queued_request(struct request *rq, int uptodate)
{
__end_request(rq, uptodate, rq_byte_size(rq), 1);
}
EXPORT_SYMBOL(end_queued_request);
/**
* end_dequeued_request - end all I/O on a dequeued request
* @rq: the request being processed
* @uptodate: error value or 0/1 uptodate flag
*
* Description:
* Ends all I/O on a request. The request must already have been
* dequeued using blkdev_dequeue_request(), as is normally the case
* for most drivers.
*
**/
void end_dequeued_request(struct request *rq, int uptodate)
{
__end_request(rq, uptodate, rq_byte_size(rq), 0);
}
EXPORT_SYMBOL(end_dequeued_request);
/**
* end_request - end I/O on the current segment of the request
* @rq: the request being processed
* @uptodate: error value or 0/1 uptodate flag
*
* Description:
* Ends I/O on the current segment of a request. If that is the only
* remaining segment, the request is also completed and freed.
*
* This is a remnant of how older block drivers handled IO completions.
* Modern drivers typically end IO on the full request in one go, unless
* they have a residual value to account for. For that case this function
* isn't really useful, unless the residual just happens to be the
* full current segment. In other words, don't use this function in new
* code. Either use end_request_completely(), or the
* end_that_request_chunk() (along with end_that_request_last()) for
* partial completions.
*
**/
void end_request(struct request *req, int uptodate)
{
__end_request(req, uptodate, req->hard_cur_sectors << 9, 1);
}
EXPORT_SYMBOL(end_request);
static void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
@ -3949,7 +4063,23 @@ static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page)
return queue_var_show(max_hw_sectors_kb, (page));
}
static ssize_t queue_max_segments_show(struct request_queue *q, char *page)
{
return queue_var_show(q->max_phys_segments, page);
}
static ssize_t queue_max_segments_store(struct request_queue *q,
const char *page, size_t count)
{
unsigned long segments;
ssize_t ret = queue_var_store(&segments, page, count);
spin_lock_irq(q->queue_lock);
q->max_phys_segments = segments;
spin_unlock_irq(q->queue_lock);
return ret;
}
static struct queue_sysfs_entry queue_requests_entry = {
.attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR },
.show = queue_requests_show,
@ -3973,6 +4103,12 @@ static struct queue_sysfs_entry queue_max_hw_sectors_entry = {
.show = queue_max_hw_sectors_show,
};
static struct queue_sysfs_entry queue_max_segments_entry = {
.attr = {.name = "max_segments", .mode = S_IRUGO | S_IWUSR },
.show = queue_max_segments_show,
.store = queue_max_segments_store,
};
static struct queue_sysfs_entry queue_iosched_entry = {
.attr = {.name = "scheduler", .mode = S_IRUGO | S_IWUSR },
.show = elv_iosched_show,
@ -3984,6 +4120,7 @@ static struct attribute *default_attrs[] = {
&queue_ra_entry.attr,
&queue_max_hw_sectors_entry.attr,
&queue_max_sectors_entry.attr,
&queue_max_segments_entry.attr,
&queue_iosched_entry.attr,
NULL,
};

2
crypto/digest.c
View File

@ -77,7 +77,7 @@ static int update2(struct hash_desc *desc,
if (!nbytes)
break;
sg = sg_next(sg);
sg = scatterwalk_sg_next(sg);
}
return 0;

2
crypto/scatterwalk.c
View File

@ -62,7 +62,7 @@ static void scatterwalk_pagedone(struct scatter_walk *walk, int out,
walk->offset += PAGE_SIZE - 1;
walk->offset &= PAGE_MASK;
if (walk->offset >= walk->sg->offset + walk->sg->length)
scatterwalk_start(walk, sg_next(walk->sg));
scatterwalk_start(walk, scatterwalk_sg_next(walk->sg));
}
}

2
crypto/scatterwalk.h
View File

@ -20,7 +20,7 @@
#include "internal.h"
static inline struct scatterlist *sg_next(struct scatterlist *sg)
static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg)
{
return (++sg)->length ? sg : (void *)sg->page;
}

35
drivers/ata/libata-core.c
View File

@ -1410,7 +1410,7 @@ static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
*/
unsigned ata_exec_internal_sg(struct ata_device *dev,
struct ata_taskfile *tf, const u8 *cdb,
int dma_dir, struct scatterlist *sg,
int dma_dir, struct scatterlist *sgl,
unsigned int n_elem, unsigned long timeout)
{
struct ata_link *link = dev->link;
@ -1472,11 +1472,12 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
qc->dma_dir = dma_dir;
if (dma_dir != DMA_NONE) {
unsigned int i, buflen = 0;
struct scatterlist *sg;
for (i = 0; i < n_elem; i++)
buflen += sg[i].length;
for_each_sg(sgl, sg, n_elem, i)
buflen += sg->length;
ata_sg_init(qc, sg, n_elem);
ata_sg_init(qc, sgl, n_elem);
qc->nbytes = buflen;
}
@ -4292,7 +4293,7 @@ void ata_sg_clean(struct ata_queued_cmd *qc)
if (qc->n_elem)
dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
/* restore last sg */
sg[qc->orig_n_elem - 1].length += qc->pad_len;
sg_last(sg, qc->orig_n_elem)->length += qc->pad_len;
if (pad_buf) {
struct scatterlist *psg = &qc->pad_sgent;
void *addr = kmap_atomic(psg->page, KM_IRQ0);
@ -4547,6 +4548,7 @@ void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
qc->orig_n_elem = 1;
qc->buf_virt = buf;
qc->nbytes = buflen;
qc->cursg = qc->__sg;
sg_init_one(&qc->sgent, buf, buflen);
}
@ -4572,6 +4574,7 @@ void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
qc->__sg = sg;
qc->n_elem = n_elem;
qc->orig_n_elem = n_elem;
qc->cursg = qc->__sg;
}
/**
@ -4661,7 +4664,7 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct scatterlist *sg = qc->__sg;
struct scatterlist *lsg = &sg[qc->n_elem - 1];
struct scatterlist *lsg = sg_last(qc->__sg, qc->n_elem);
int n_elem, pre_n_elem, dir, trim_sg = 0;
VPRINTK("ENTER, ata%u\n", ap->print_id);
@ -4825,7 +4828,6 @@ void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
static void ata_pio_sector(struct ata_queued_cmd *qc)
{
int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
struct scatterlist *sg = qc->__sg;
struct ata_port *ap = qc->ap;
struct page *page;
unsigned int offset;
@ -4834,8 +4836,8 @@ static void ata_pio_sector(struct ata_queued_cmd *qc)
if (qc->curbytes == qc->nbytes - qc->sect_size)
ap->hsm_task_state = HSM_ST_LAST;
page = sg[qc->cursg].page;
offset = sg[qc->cursg].offset + qc->cursg_ofs;
page = qc->cursg->page;
offset = qc->cursg->offset + qc->cursg_ofs;
/* get the current page and offset */
page = nth_page(page, (offset >> PAGE_SHIFT));
@ -4863,8 +4865,8 @@ static void ata_pio_sector(struct ata_queued_cmd *qc)
qc->curbytes += qc->sect_size;
qc->cursg_ofs += qc->sect_size;
if (qc->cursg_ofs == (&sg[qc->cursg])->length) {
qc->cursg++;
if (qc->cursg_ofs == qc->cursg->length) {
qc->cursg = sg_next(qc->cursg);
qc->cursg_ofs = 0;
}
}
@ -4950,16 +4952,18 @@ static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
{
int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
struct scatterlist *sg = qc->__sg;
struct scatterlist *lsg = sg_last(qc->__sg, qc->n_elem);
struct ata_port *ap = qc->ap;
struct page *page;
unsigned char *buf;
unsigned int offset, count;
int no_more_sg = 0;
if (qc->curbytes + bytes >= qc->nbytes)
ap->hsm_task_state = HSM_ST_LAST;
next_sg:
if (unlikely(qc->cursg >= qc->n_elem)) {
if (unlikely(no_more_sg)) {
/*
* The end of qc->sg is reached and the device expects
* more data to transfer. In order not to overrun qc->sg
@ -4982,7 +4986,7 @@ next_sg:
return;
}
sg = &qc->__sg[qc->cursg];
sg = qc->cursg;
page = sg->page;
offset = sg->offset + qc->cursg_ofs;
@ -5021,7 +5025,10 @@ next_sg:
qc->cursg_ofs += count;
if (qc->cursg_ofs == sg->length) {
qc->cursg++;
if (qc->cursg == lsg)
no_more_sg = 1;
qc->cursg = sg_next(qc->cursg);
qc->cursg_ofs = 0;
}

2
drivers/ata/libata-scsi.c
View File

@ -801,8 +801,6 @@ int ata_scsi_slave_config(struct scsi_device *sdev)
ata_scsi_sdev_config(sdev);
blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
sdev->manage_start_stop = 1;
if (dev)

2
drivers/block/cciss.c
View File

@ -1191,7 +1191,6 @@ static inline void complete_buffers(struct bio *bio, int status)
{
while (bio) {
struct bio *xbh = bio->bi_next;
int nr_sectors = bio_sectors(bio);
bio->bi_next = NULL;
bio_endio(bio, status ? 0 : -EIO);
@ -2570,6 +2569,7 @@ static void do_cciss_request(struct request_queue *q)
(int)creq->nr_sectors);
#endif /* CCISS_DEBUG */
memset(tmp_sg, 0, sizeof(tmp_sg));
seg = blk_rq_map_sg(q, creq, tmp_sg);
/* get the DMA records for the setup */

3
drivers/block/cpqarray.c
View File

@ -981,9 +981,8 @@ static void start_io(ctlr_info_t *h)
static inline void complete_buffers(struct bio *bio, int ok)
{
struct bio *xbh;
while(bio) {
int nr_sectors = bio_sectors(bio);
while (bio) {
xbh = bio->bi_next;
bio->bi_next = NULL;

7
drivers/block/pktcdvd.c
View File

@ -1133,16 +1133,21 @@ static void pkt_gather_data(struct pktcdvd_device *pd, struct packet_data *pkt)
* Schedule reads for missing parts of the packet.
*/
for (f = 0; f < pkt->frames; f++) {
struct bio_vec *vec;
int p, offset;
if (written[f])
continue;
bio = pkt->r_bios[f];
vec = bio->bi_io_vec;
bio_init(bio);
bio->bi_max_vecs = 1;
bio->bi_sector = pkt->sector + f * (CD_FRAMESIZE >> 9);
bio->bi_bdev = pd->bdev;
bio->bi_end_io = pkt_end_io_read;
bio->bi_private = pkt;
bio->bi_io_vec = vec;
bio->bi_destructor = pkt_bio_destructor;
p = (f * CD_FRAMESIZE) / PAGE_SIZE;
offset = (f * CD_FRAMESIZE) % PAGE_SIZE;
@ -1439,6 +1444,8 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
pkt->w_bio->bi_bdev = pd->bdev;
pkt->w_bio->bi_end_io = pkt_end_io_packet_write;
pkt->w_bio->bi_private = pkt;
pkt->w_bio->bi_io_vec = bvec;
pkt->w_bio->bi_destructor = pkt_bio_destructor;
for (f = 0; f < pkt->frames; f++)
if (!bio_add_page(pkt->w_bio, bvec[f].bv_page, CD_FRAMESIZE, bvec[f].bv_offset))
BUG();

21
drivers/block/ps3disk.c
View File

@ -414,26 +414,6 @@ static void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
req->cmd_type = REQ_TYPE_FLUSH;
}
static int ps3disk_issue_flush(struct request_queue *q, struct gendisk *gendisk,
sector_t *sector)
{
struct ps3_storage_device *dev = q->queuedata;
struct request *req;
int res;
dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
req = blk_get_request(q, WRITE, __GFP_WAIT);
ps3disk_prepare_flush(q, req);
res = blk_execute_rq(q, gendisk, req, 0);
if (res)
dev_err(&dev->sbd.core, "%s:%u: flush request failed %d\n",
__func__, __LINE__, res);
blk_put_request(req);
return res;
}
static unsigned long ps3disk_mask;
static DEFINE_MUTEX(ps3disk_mask_mutex);
@ -506,7 +486,6 @@ static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
blk_queue_dma_alignment(queue, dev->blk_size-1);
blk_queue_hardsect_size(queue, dev->blk_size);
blk_queue_issue_flush_fn(queue, ps3disk_issue_flush);
blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
ps3disk_prepare_flush);

3
drivers/ide/cris/ide-cris.c
View File

@ -939,7 +939,8 @@ static int cris_ide_build_dmatable (ide_drive_t *drive)
/* group sequential buffers into one large buffer */
addr = page_to_phys(sg->page) + sg->offset;
size = sg_dma_len(sg);
while (sg++, --i) {
while (--i) {
sg = sg_next(sg);
if ((addr + size) != page_to_phys(sg->page) + sg->offset)
break;
size += sg_dma_len(sg);

29
drivers/ide/ide-disk.c
View File

@ -716,32 +716,6 @@ static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
rq->buffer = rq->cmd;
}
static int idedisk_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
ide_drive_t *drive = q->queuedata;
struct request *rq;
int ret;
if (!drive->wcache)
return 0;
rq = blk_get_request(q, WRITE, __GFP_WAIT);
idedisk_prepare_flush(q, rq);
ret = blk_execute_rq(q, disk, rq, 0);
/*
* if we failed and caller wants error offset, get it
*/
if (ret && error_sector)
*error_sector = ide_get_error_location(drive, rq->cmd);
blk_put_request(rq);
return ret;
}
/*
* This is tightly woven into the driver->do_special can not touch.
* DON'T do it again until a total personality rewrite is committed.
@ -781,7 +755,6 @@ static void update_ordered(ide_drive_t *drive)
struct hd_driveid *id = drive->id;
unsigned ordered = QUEUE_ORDERED_NONE;
prepare_flush_fn *prep_fn = NULL;
issue_flush_fn *issue_fn = NULL;
if (drive->wcache) {
unsigned long long capacity;
@ -805,13 +778,11 @@ static void update_ordered(ide_drive_t *drive)
if (barrier) {
ordered = QUEUE_ORDERED_DRAIN_FLUSH;
prep_fn = idedisk_prepare_flush;
issue_fn = idedisk_issue_flush;
}
} else
ordered = QUEUE_ORDERED_DRAIN;
blk_queue_ordered(drive->queue, ordered, prep_fn);
blk_queue_issue_flush_fn(drive->queue, issue_fn);
}
static int write_cache(ide_drive_t *drive, int arg)

2
drivers/ide/ide-dma.c
View File

@ -280,7 +280,7 @@ int ide_build_dmatable (ide_drive_t *drive, struct request *rq)
}
}
sg++;
sg = sg_next(sg);
i--;
}

38
drivers/ide/ide-io.c
View File

@ -322,41 +322,6 @@ static void ide_complete_pm_request (ide_drive_t *drive, struct request *rq)
spin_unlock_irqrestore(&ide_lock, flags);
}
/*
* FIXME: probably move this somewhere else, name is bad too :)
*/
u64 ide_get_error_location(ide_drive_t *drive, char *args)
{
u32 high, low;
u8 hcyl, lcyl, sect;
u64 sector;
high = 0;
hcyl = args[5];
lcyl = args[4];
sect = args[3];
if (ide_id_has_flush_cache_ext(drive->id)) {
low = (hcyl << 16) | (lcyl << 8) | sect;
HWIF(drive)->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
high = ide_read_24(drive);
} else {
u8 cur = HWIF(drive)->INB(IDE_SELECT_REG);
if (cur & 0x40) {
high = cur & 0xf;
low = (hcyl << 16) | (lcyl << 8) | sect;
} else {
low = hcyl * drive->head * drive->sect;
low += lcyl * drive->sect;
low += sect - 1;
}
}
sector = ((u64) high << 24) | low;
return sector;
}
EXPORT_SYMBOL(ide_get_error_location);
/**
* ide_end_drive_cmd - end an explicit drive command
* @drive: command
@ -881,7 +846,8 @@ void ide_init_sg_cmd(ide_drive_t *drive, struct request *rq)
ide_hwif_t *hwif = drive->hwif;
hwif->nsect = hwif->nleft = rq->nr_sectors;
hwif->cursg = hwif->cursg_ofs = 0;
hwif->cursg_ofs = 0;
hwif->cursg = NULL;
}
EXPORT_SYMBOL_GPL(ide_init_sg_cmd);

2
drivers/ide/ide-probe.c
View File

@ -1349,7 +1349,7 @@ static int hwif_init(ide_hwif_t *hwif)
if (!hwif->sg_max_nents)
hwif->sg_max_nents = PRD_ENTRIES;
hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
hwif->sg_table = kzalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
GFP_KERNEL);
if (!hwif->sg_table) {
printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);

18
drivers/ide/ide-taskfile.c
View File

@ -45,6 +45,7 @@
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/bitops.h>
#include <linux/scatterlist.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
@ -263,6 +264,7 @@ static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
struct scatterlist *cursg = hwif->cursg;
struct page *page;
#ifdef CONFIG_HIGHMEM
unsigned long flags;
@ -270,8 +272,14 @@ static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
unsigned int offset;
u8 *buf;
page = sg[hwif->cursg].page;
offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
cursg = hwif->cursg;
if (!cursg) {
cursg = sg;
hwif->cursg = sg;
}
page = cursg->page;
offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
/* get the current page and offset */
page = nth_page(page, (offset >> PAGE_SHIFT));
@ -285,8 +293,8 @@ static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
hwif->nleft--;
hwif->cursg_ofs++;
if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
hwif->cursg++;
if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
hwif->cursg = sg_next(hwif->cursg);
hwif->cursg_ofs = 0;
}
@ -367,6 +375,8 @@ static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
{
HWIF(drive)->cursg = NULL;
if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
ide_task_t *task = rq->special;

2
drivers/ide/mips/au1xxx-ide.c
View File

@ -296,7 +296,7 @@ static int auide_build_dmatable(ide_drive_t *drive)
cur_addr += tc;
cur_len -= tc;
}
sg++;
sg = sg_next(sg);
i--;
}

3
drivers/ide/pci/sgiioc4.c
View File

@ -29,6 +29,7 @@
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <linux/scatterlist.h>
#include <linux/ioc4.h>
#include <asm/io.h>
@ -537,7 +538,7 @@ sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir)
}
}
sg++;
sg = sg_next(sg);
i--;
}

2
drivers/ide/ppc/pmac.c
View File

@ -1539,7 +1539,7 @@ pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq)
cur_len -= tc;
++table;
}
sg++;
sg = sg_next(sg);
i--;
}

10
drivers/infiniband/hw/ipath/ipath_dma.c
View File

@ -30,6 +30,7 @@
* SOFTWARE.
*/
#include <linux/scatterlist.h>
#include <rdma/ib_verbs.h>
#include "ipath_verbs.h"
@ -96,17 +97,18 @@ static void ipath_dma_unmap_page(struct ib_device *dev,
BUG_ON(!valid_dma_direction(direction));
}
static int ipath_map_sg(struct ib_device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction)
static int ipath_map_sg(struct ib_device *dev, struct scatterlist *sgl,
int nents, enum dma_data_direction direction)
{
struct scatterlist *sg;
u64 addr;
int i;
int ret = nents;
BUG_ON(!valid_dma_direction(direction));
for (i = 0; i < nents; i++) {
addr = (u64) page_address(sg[i].page);
for_each_sg(sgl, sg, nents, i) {
addr = (u64) page_address(sg->page);
/* TODO: handle highmem pages */
if (!addr) {
ret = 0;

75
drivers/infiniband/ulp/iser/iser_memory.c
View File

@ -124,17 +124,19 @@ static int iser_start_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask,
if (cmd_dir == ISER_DIR_OUT) {
/* copy the unaligned sg the buffer which is used for RDMA */
struct scatterlist *sg = (struct scatterlist *)data->buf;
struct scatterlist *sgl = (struct scatterlist *)data->buf;
struct scatterlist *sg;
int i;
char *p, *from;
for (p = mem, i = 0; i < data->size; i++) {
from = kmap_atomic(sg[i].page, KM_USER0);
p = mem;
for_each_sg(sgl, sg, data->size, i) {
from = kmap_atomic(sg->page, KM_USER0);
memcpy(p,
from + sg[i].offset,
sg[i].length);
from + sg->offset,
sg->length);
kunmap_atomic(from, KM_USER0);
p += sg[i].length;
p += sg->length;
}
}
@ -176,7 +178,7 @@ void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask,
if (cmd_dir == ISER_DIR_IN) {
char *mem;
struct scatterlist *sg;
struct scatterlist *sgl, *sg;
unsigned char *p, *to;
unsigned int sg_size;
int i;
@ -184,16 +186,17 @@ void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask,
/* copy back read RDMA to unaligned sg */
mem = mem_copy->copy_buf;
sg = (struct scatterlist *)iser_ctask->data[ISER_DIR_IN].buf;
sgl = (struct scatterlist *)iser_ctask->data[ISER_DIR_IN].buf;
sg_size = iser_ctask->data[ISER_DIR_IN].size;
for (p = mem, i = 0; i < sg_size; i++){
to = kmap_atomic(sg[i].page, KM_SOFTIRQ0);
memcpy(to + sg[i].offset,
p = mem;
for_each_sg(sgl, sg, sg_size, i) {
to = kmap_atomic(sg->page, KM_SOFTIRQ0);
memcpy(to + sg->offset,
p,
sg[i].length);
sg->length);
kunmap_atomic(to, KM_SOFTIRQ0);
p += sg[i].length;
p += sg->length;
}
}
@ -224,7 +227,8 @@ static int iser_sg_to_page_vec(struct iser_data_buf *data,
struct iser_page_vec *page_vec,
struct ib_device *ibdev)
{
struct scatterlist *sg = (struct scatterlist *)data->buf;
struct scatterlist *sgl = (struct scatterlist *)data->buf;
struct scatterlist *sg;
u64 first_addr, last_addr, page;
int end_aligned;
unsigned int cur_page = 0;
@ -232,24 +236,25 @@ static int iser_sg_to_page_vec(struct iser_data_buf *data,
int i;
/* compute the offset of first element */
page_vec->offset = (u64) sg[0].offset & ~MASK_4K;
page_vec->offset = (u64) sgl[0].offset & ~MASK_4K;
for (i = 0; i < data->dma_nents; i++) {
unsigned int dma_len = ib_sg_dma_len(ibdev, &sg[i]);
for_each_sg(sgl, sg, data->dma_nents, i) {
unsigned int dma_len = ib_sg_dma_len(ibdev, sg);
total_sz += dma_len;
first_addr = ib_sg_dma_address(ibdev, &sg[i]);
first_addr = ib_sg_dma_address(ibdev, sg);
last_addr = first_addr + dma_len;
end_aligned = !(last_addr & ~MASK_4K);
/* continue to collect page fragments till aligned or SG ends */
while (!end_aligned && (i + 1 < data->dma_nents)) {
sg = sg_next(sg);
i++;
dma_len = ib_sg_dma_len(ibdev, &sg[i]);
dma_len = ib_sg_dma_len(ibdev, sg);
total_sz += dma_len;
last_addr = ib_sg_dma_address(ibdev, &sg[i]) + dma_len;
last_addr = ib_sg_dma_address(ibdev, sg) + dma_len;
end_aligned = !(last_addr & ~MASK_4K);
}
@ -284,25 +289,26 @@ static int iser_sg_to_page_vec(struct iser_data_buf *data,
static unsigned int iser_data_buf_aligned_len(struct iser_data_buf *data,
struct ib_device *ibdev)
{
struct scatterlist *sg;
struct scatterlist *sgl, *sg;
u64 end_addr, next_addr;
int i, cnt;
unsigned int ret_len = 0;
sg = (struct scatterlist *)data->buf;
sgl = (struct scatterlist *)data->buf;
for (cnt = 0, i = 0; i < data->dma_nents; i++, cnt++) {
cnt = 0;
for_each_sg(sgl, sg, data->dma_nents, i) {
/* iser_dbg("Checking sg iobuf [%d]: phys=0x%08lX "
"offset: %ld sz: %ld\n", i,
(unsigned long)page_to_phys(sg[i].page),
(unsigned long)sg[i].offset,
(unsigned long)sg[i].length); */
end_addr = ib_sg_dma_address(ibdev, &sg[i]) +
ib_sg_dma_len(ibdev, &sg[i]);
(unsigned long)page_to_phys(sg->page),
(unsigned long)sg->offset,
(unsigned long)sg->length); */
end_addr = ib_sg_dma_address(ibdev, sg) +
ib_sg_dma_len(ibdev, sg);
/* iser_dbg("Checking sg iobuf end address "
"0x%08lX\n", end_addr); */
if (i + 1 < data->dma_nents) {
next_addr = ib_sg_dma_address(ibdev, &sg[i+1]);
next_addr = ib_sg_dma_address(ibdev, sg_next(sg));
/* are i, i+1 fragments of the same page? */
if (end_addr == next_addr)
continue;
@ -322,15 +328,16 @@ static unsigned int iser_data_buf_aligned_len(struct iser_data_buf *data,
static void iser_data_buf_dump(struct iser_data_buf *data,
struct ib_device *ibdev)
{
struct scatterlist *sg = (struct scatterlist *)data->buf;
struct scatterlist *sgl = (struct scatterlist *)data->buf;
struct scatterlist *sg;
int i;
for (i = 0; i < data->dma_nents; i++)
for_each_sg(sgl, sg, data->dma_nents, i)
iser_err("sg[%d] dma_addr:0x%lX page:0x%p "
"off:0x%x sz:0x%x dma_len:0x%x\n",
i, (unsigned long)ib_sg_dma_address(ibdev, &sg[i]),
sg[i].page, sg[i].offset,
sg[i].length, ib_sg_dma_len(ibdev, &sg[i]));
i, (unsigned long)ib_sg_dma_address(ibdev, sg),
sg->page, sg->offset,
sg->length, ib_sg_dma_len(ibdev, sg));
}
static void iser_dump_page_vec(struct iser_page_vec *page_vec)

31
drivers/md/dm-crypt.c
View File

@ -441,33 +441,12 @@ static struct bio *crypt_alloc_buffer(struct dm_crypt_io *io, unsigned size)
return clone;
}
static void crypt_free_buffer_pages(struct crypt_config *cc,
struct bio *clone, unsigned int bytes)
static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone)
{
unsigned int i, start, end;
unsigned int i;
struct bio_vec *bv;
/*
* This is ugly, but Jens Axboe thinks that using bi_idx in the
* endio function is too dangerous at the moment, so I calculate the
* correct position using bi_vcnt and bi_size.
* The bv_offset and bv_len fields might already be modified but we
* know that we always allocated whole pages.
* A fix to the bi_idx issue in the kernel is in the works, so
* we will hopefully be able to revert to the cleaner solution soon.
*/
i = clone->bi_vcnt - 1;
bv = bio_iovec_idx(clone, i);
end = (i << PAGE_SHIFT) + (bv->bv_offset + bv->bv_len) - clone->bi_size;
start = end - bytes;
start >>= PAGE_SHIFT;
if (!clone->bi_size)
end = clone->bi_vcnt;
else
end >>= PAGE_SHIFT;
for (i = start; i < end; i++) {
for (i = 0; i < clone->bi_vcnt; i++) {
bv = bio_iovec_idx(clone, i);
BUG_ON(!bv->bv_page);
mempool_free(bv->bv_page, cc->page_pool);
@ -519,7 +498,7 @@ static void crypt_endio(struct bio *clone, int error)
* free the processed pages
*/
if (!read_io) {
crypt_free_buffer_pages(cc, clone, clone->bi_size);
crypt_free_buffer_pages(cc, clone);
goto out;
}
@ -608,7 +587,7 @@ static void process_write(struct dm_crypt_io *io)
ctx.idx_out = 0;
if (unlikely(crypt_convert(cc, &ctx) < 0)) {
crypt_free_buffer_pages(cc, clone, clone->bi_size);
crypt_free_buffer_pages(cc, clone);
bio_put(clone);
dec_pending(io, -EIO);
return;

28
drivers/md/dm-table.c
View File

@ -999,33 +999,6 @@ void dm_table_unplug_all(struct dm_table *t)
}
}
int dm_table_flush_all(struct dm_table *t)
{
struct list_head *d, *devices = dm_table_get_devices(t);
int ret = 0;
unsigned i;
for (i = 0; i < t->num_targets; i++)
if (t->targets[i].type->flush)
t->targets[i].type->flush(&t->targets[i]);
for (d = devices->next; d != devices; d = d->next) {
struct dm_dev *dd = list_entry(d, struct dm_dev, list);
struct request_queue *q = bdev_get_queue(dd->bdev);
int err;
if (!q->issue_flush_fn)
err = -EOPNOTSUPP;
else
err = q->issue_flush_fn(q, dd->bdev->bd_disk, NULL);
if (!ret)
ret = err;
}
return ret;
}
struct mapped_device *dm_table_get_md(struct dm_table *t)
{
dm_get(t->md);
@ -1043,4 +1016,3 @@ EXPORT_SYMBOL(dm_table_get_md);
EXPORT_SYMBOL(dm_table_put);
EXPORT_SYMBOL(dm_table_get);
EXPORT_SYMBOL(dm_table_unplug_all);
EXPORT_SYMBOL(dm_table_flush_all);

16
drivers/md/dm.c
View File

@ -840,21 +840,6 @@ static int dm_request(struct request_queue *q, struct bio *bio)
return 0;
}
static int dm_flush_all(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
struct mapped_device *md = q->queuedata;
struct dm_table *map = dm_get_table(md);
int ret = -ENXIO;
if (map) {
ret = dm_table_flush_all(map);
dm_table_put(map);
}
return ret;
}
static void dm_unplug_all(struct request_queue *q)
{
struct mapped_device *md = q->queuedata;
@ -1003,7 +988,6 @@ static struct mapped_device *alloc_dev(int minor)
blk_queue_make_request(md->queue, dm_request);
blk_queue_bounce_limit(md->queue, BLK_BOUNCE_ANY);
md->queue->unplug_fn = dm_unplug_all;
md->queue->issue_flush_fn = dm_flush_all;
md->io_pool = mempool_create_slab_pool(MIN_IOS, _io_cache);
if (!md->io_pool)

1
drivers/md/dm.h
View File

@ -111,7 +111,6 @@ void dm_table_postsuspend_targets(struct dm_table *t);
int dm_table_resume_targets(struct dm_table *t);
int dm_table_any_congested(struct dm_table *t, int bdi_bits);
void dm_table_unplug_all(struct dm_table *t);
int dm_table_flush_all(struct dm_table *t);
/*-----------------------------------------------------------------
* A registry of target types.

20
drivers/md/linear.c
View File

@ -92,25 +92,6 @@ static void linear_unplug(struct request_queue *q)
}
}
static int linear_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
linear_conf_t *conf = mddev_to_conf(mddev);
int i, ret = 0;
for (i=0; i < mddev->raid_disks && ret == 0; i++) {
struct block_device *bdev = conf->disks[i].rdev->bdev;
struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
else
ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk, error_sector);
}
return ret;
}
static int linear_congested(void *data, int bits)
{
mddev_t *mddev = data;
@ -279,7 +260,6 @@ static int linear_run (mddev_t *mddev)
blk_queue_merge_bvec(mddev->queue, linear_mergeable_bvec);
mddev->queue->unplug_fn = linear_unplug;
mddev->queue->issue_flush_fn = linear_issue_flush;
mddev->queue->backing_dev_info.congested_fn = linear_congested;
mddev->queue->backing_dev_info.congested_data = mddev;
return 0;

1
drivers/md/md.c
View File

@ -3463,7 +3463,6 @@ static int do_md_stop(mddev_t * mddev, int mode)
mddev->pers->stop(mddev);
mddev->queue->merge_bvec_fn = NULL;
mddev->queue->unplug_fn = NULL;
mddev->queue->issue_flush_fn = NULL;
mddev->queue->backing_dev_info.congested_fn = NULL;
if (mddev->pers->sync_request)
sysfs_remove_group(&mddev->kobj, &md_redundancy_group);

30
drivers/md/multipath.c
View File

@ -194,35 +194,6 @@ static void multipath_status (struct seq_file *seq, mddev_t *mddev)
seq_printf (seq, "]");
}
static int multipath_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
multipath_conf_t *conf = mddev_to_conf(mddev);
int i, ret = 0;
rcu_read_lock();
for (i=0; i<mddev->raid_disks && ret == 0; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct block_device *bdev = rdev->bdev;
struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
else {
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk,
error_sector);
rdev_dec_pending(rdev, mddev);
rcu_read_lock();
}
}
}
rcu_read_unlock();
return ret;
}
static int multipath_congested(void *data, int bits)
{
mddev_t *mddev = data;
@ -527,7 +498,6 @@ static int multipath_run (mddev_t *mddev)
mddev->array_size = mddev->size;
mddev->queue->unplug_fn = multipath_unplug;
mddev->queue->issue_flush_fn = multipath_issue_flush;
mddev->queue->backing_dev_info.congested_fn = multipath_congested;
mddev->queue->backing_dev_info.congested_data = mddev;

21
drivers/md/raid0.c
View File

@ -40,26 +40,6 @@ static void raid0_unplug(struct request_queue *q)
}
}
static int raid0_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
raid0_conf_t *conf = mddev_to_conf(mddev);
mdk_rdev_t **devlist = conf->strip_zone[0].dev;
int i, ret = 0;
for (i=0; i<mddev->raid_disks && ret == 0; i++) {
struct block_device *bdev = devlist[i]->bdev;
struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
else
ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk, error_sector);
}
return ret;
}
static int raid0_congested(void *data, int bits)
{
mddev_t *mddev = data;
@ -250,7 +230,6 @@ static int create_strip_zones (mddev_t *mddev)
mddev->queue->unplug_fn = raid0_unplug;
mddev->queue->issue_flush_fn = raid0_issue_flush;
mddev->queue->backing_dev_info.congested_fn = raid0_congested;
mddev->queue->backing_dev_info.congested_data = mddev;

31
drivers/md/raid1.c
View File

@ -567,36 +567,6 @@ static void raid1_unplug(struct request_queue *q)
md_wakeup_thread(mddev->thread);
}
static int raid1_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
conf_t *conf = mddev_to_conf(mddev);
int i, ret = 0;
rcu_read_lock();
for (i=0; i<mddev->raid_disks && ret == 0; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct block_device *bdev = rdev->bdev;
struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
else {
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk,
error_sector);
rdev_dec_pending(rdev, mddev);
rcu_read_lock();
}
}
}
rcu_read_unlock();
return ret;
}
static int raid1_congested(void *data, int bits)
{
mddev_t *mddev = data;
@ -1997,7 +1967,6 @@ static int run(mddev_t *mddev)
mddev->array_size = mddev->size;
mddev->queue->unplug_fn = raid1_unplug;
mddev->queue->issue_flush_fn = raid1_issue_flush;
mddev->queue->backing_dev_info.congested_fn = raid1_congested;
mddev->queue->backing_dev_info.congested_data = mddev;

31
drivers/md/raid10.c
View File

@ -611,36 +611,6 @@ static void raid10_unplug(struct request_queue *q)
md_wakeup_thread(mddev->thread);
}
static int raid10_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
conf_t *conf = mddev_to_conf(mddev);
int i, ret = 0;
rcu_read_lock();
for (i=0; i<mddev->raid_disks && ret == 0; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct block_device *bdev = rdev->bdev;
struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
else {
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk,
error_sector);
rdev_dec_pending(rdev, mddev);
rcu_read_lock();
}
}
}
rcu_read_unlock();
return ret;
}
static int raid10_congested(void *data, int bits)
{
mddev_t *mddev = data;
@ -2118,7 +2088,6 @@ static int run(mddev_t *mddev)
mddev->resync_max_sectors = size << conf->chunk_shift;
mddev->queue->unplug_fn = raid10_unplug;
mddev->queue->issue_flush_fn = raid10_issue_flush;
mddev->queue->backing_dev_info.congested_fn = raid10_congested;
mddev->queue->backing_dev_info.congested_data = mddev;

31
drivers/md/raid5.c
View File

@ -3204,36 +3204,6 @@ static void raid5_unplug_device(struct request_queue *q)
unplug_slaves(mddev);
}
static int raid5_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
mddev_t *mddev = q->queuedata;
raid5_conf_t *conf = mddev_to_conf(mddev);
int i, ret = 0;
rcu_read_lock();
for (i=0; i<mddev->raid_disks && ret == 0; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->disks[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct block_device *bdev = rdev->bdev;
struct request_queue *r_queue = bdev_get_queue(bdev);
if (!r_queue->issue_flush_fn)
ret = -EOPNOTSUPP;
else {
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk,
error_sector);
rdev_dec_pending(rdev, mddev);
rcu_read_lock();
}
}
}
rcu_read_unlock();
return ret;
}
static int raid5_congested(void *data, int bits)
{
mddev_t *mddev = data;
@ -4263,7 +4233,6 @@ static int run(mddev_t *mddev)
mdname(mddev));
mddev->queue->unplug_fn = raid5_unplug_device;
mddev->queue->issue_flush_fn = raid5_issue_flush;
mddev->queue->backing_dev_info.congested_data = mddev;
mddev->queue->backing_dev_info.congested_fn = raid5_congested;

6
drivers/message/fusion/mptscsih.c
View File

@ -293,7 +293,7 @@ nextSGEset:
for (ii=0; ii < (numSgeThisFrame-1); ii++) {
thisxfer = sg_dma_len(sg);
if (thisxfer == 0) {
sg ++; /* Get next SG element from the OS */
sg = sg_next(sg); /* Get next SG element from the OS */
sg_done++;
continue;
}
@ -301,7 +301,7 @@ nextSGEset:
v2 = sg_dma_address(sg);
mptscsih_add_sge(psge, sgflags | thisxfer, v2);
sg++; /* Get next SG element from the OS */
sg = sg_next(sg); /* Get next SG element from the OS */
psge += (sizeof(u32) + sizeof(dma_addr_t));
sgeOffset += (sizeof(u32) + sizeof(dma_addr_t));
sg_done++;
@ -322,7 +322,7 @@ nextSGEset:
v2 = sg_dma_address(sg);
mptscsih_add_sge(psge, sgflags | thisxfer, v2);
/*
sg++;
sg = sg_next(sg);
psge += (sizeof(u32) + sizeof(dma_addr_t));
*/
sgeOffset += (sizeof(u32) + sizeof(dma_addr_t));

24
drivers/message/i2o/i2o_block.c
View File

@ -148,29 +148,6 @@ static int i2o_block_device_flush(struct i2o_device *dev)
return i2o_msg_post_wait(dev->iop, msg, 60);
};
/**
* i2o_block_issue_flush - device-flush interface for block-layer
* @queue: the request queue of the device which should be flushed
* @disk: gendisk
* @error_sector: error offset
*
* Helper function to provide flush functionality to block-layer.
*
* Returns 0 on success or negative error code on failure.
*/
static int i2o_block_issue_flush(struct request_queue * queue, struct gendisk *disk,
sector_t * error_sector)
{
struct i2o_block_device *i2o_blk_dev = queue->queuedata;
int rc = -ENODEV;
if (likely(i2o_blk_dev))
rc = i2o_block_device_flush(i2o_blk_dev->i2o_dev);
return rc;
}
/**
* i2o_block_device_mount - Mount (load) the media of device dev
* @dev: I2O device which should receive the mount request
@ -1009,7 +986,6 @@ static struct i2o_block_device *i2o_block_device_alloc(void)
}
blk_queue_prep_rq(queue, i2o_block_prep_req_fn);
blk_queue_issue_flush_fn(queue, i2o_block_issue_flush);
gd->major = I2O_MAJOR;
gd->queue = queue;

6
drivers/mmc/card/queue.c
View File

@ -153,14 +153,14 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
blk_queue_max_hw_segments(mq->queue, bouncesz / 512);
blk_queue_max_segment_size(mq->queue, bouncesz);
mq->sg = kmalloc(sizeof(struct scatterlist),
mq->sg = kzalloc(sizeof(struct scatterlist),
GFP_KERNEL);
if (!mq->sg) {
ret = -ENOMEM;
goto cleanup_queue;
}
mq->bounce_sg = kmalloc(sizeof(struct scatterlist) *
mq->bounce_sg = kzalloc(sizeof(struct scatterlist) *
bouncesz / 512, GFP_KERNEL);
if (!mq->bounce_sg) {
ret = -ENOMEM;
@ -177,7 +177,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
blk_queue_max_hw_segments(mq->queue, host->max_hw_segs);
blk_queue_max_segment_size(mq->queue, host->max_seg_size);
mq->sg = kmalloc(sizeof(struct scatterlist) *
mq->sg = kzalloc(sizeof(struct scatterlist) *
host->max_phys_segs, GFP_KERNEL);
if (!mq->sg) {
ret = -ENOMEM;

1
drivers/s390/scsi/zfcp_def.h
View File

@ -34,6 +34,7 @@
#include <linux/slab.h>
#include <linux/mempool.h>
#include <linux/syscalls.h>
#include <linux/scatterlist.h>
#include <linux/ioctl.h>
#include <scsi/scsi.h>
#include <scsi/scsi_tcq.h>

6
drivers/s390/scsi/zfcp_qdio.c
View File

@ -590,7 +590,7 @@ zfcp_qdio_sbals_from_segment(struct zfcp_fsf_req *fsf_req, unsigned long sbtype,
*/
int
zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype,
struct scatterlist *sg, int sg_count, int max_sbals)
struct scatterlist *sgl, int sg_count, int max_sbals)
{
int sg_index;
struct scatterlist *sg_segment;
@ -606,9 +606,7 @@ zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype,
sbale->flags |= sbtype;
/* process all segements of scatter-gather list */
for (sg_index = 0, sg_segment = sg, bytes = 0;
sg_index < sg_count;
sg_index++, sg_segment++) {
for_each_sg(sgl, sg_segment, sg_count, sg_index) {
retval = zfcp_qdio_sbals_from_segment(
fsf_req,
sbtype,

1
drivers/scsi/3w-9xxx.c
View File

@ -1990,6 +1990,7 @@ static struct scsi_host_template driver_template = {
.max_sectors = TW_MAX_SECTORS,
.cmd_per_lun = TW_MAX_CMDS_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = twa_host_attrs,
.emulated = 1
};

1
drivers/scsi/3w-xxxx.c
View File

@ -2261,6 +2261,7 @@ static struct scsi_host_template driver_template = {
.max_sectors = TW_MAX_SECTORS,
.cmd_per_lun = TW_MAX_CMDS_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = tw_host_attrs,
.emulated = 1
};

1
drivers/scsi/BusLogic.c
View File

@ -3575,6 +3575,7 @@ static struct scsi_host_template Bus_Logic_template = {
.unchecked_isa_dma = 1,
.max_sectors = 128,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
/*

3
drivers/scsi/NCR53c406a.c
View File

@ -1066,7 +1066,8 @@ static struct scsi_host_template driver_template =
.sg_tablesize = 32 /*SG_ALL*/ /*SG_NONE*/,
.cmd_per_lun = 1 /* commands per lun */,
.unchecked_isa_dma = 1 /* unchecked_isa_dma */,
.use_clustering = ENABLE_CLUSTERING
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#include "scsi_module.c"

1
drivers/scsi/a100u2w.c
View File

@ -1071,6 +1071,7 @@ static struct scsi_host_template inia100_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int __devinit inia100_probe_one(struct pci_dev *pdev,

1
drivers/scsi/aacraid/linit.c
View File

@ -944,6 +944,7 @@ static struct scsi_host_template aac_driver_template = {
.cmd_per_lun = AAC_NUM_IO_FIB,
#endif
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.emulated = 1,
};

32
drivers/scsi/aha1542.c
View File

@ -61,15 +61,15 @@ static void BAD_DMA(void *address, unsigned int length)
}
static void BAD_SG_DMA(Scsi_Cmnd * SCpnt,
struct scatterlist *sgpnt,
struct scatterlist *sgp,
int nseg,
int badseg)
{
printk(KERN_CRIT "sgpnt[%d:%d] page %p/0x%llx length %u\n",
badseg, nseg,
page_address(sgpnt[badseg].page) + sgpnt[badseg].offset,
(unsigned long long)SCSI_SG_PA(&sgpnt[badseg]),
sgpnt[badseg].length);
page_address(sgp->page) + sgp->offset,
(unsigned long long)SCSI_SG_PA(sgp),
sgp->length);
/*
* Not safe to continue.
@ -691,7 +691,7 @@ static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
memcpy(ccb[mbo].cdb, cmd, ccb[mbo].cdblen);
if (SCpnt->use_sg) {
struct scatterlist *sgpnt;
struct scatterlist *sg;
struct chain *cptr;
#ifdef DEBUG
unsigned char *ptr;
@ -699,23 +699,21 @@ static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
int i;
ccb[mbo].op = 2; /* SCSI Initiator Command w/scatter-gather */
SCpnt->host_scribble = kmalloc(512, GFP_KERNEL | GFP_DMA);
sgpnt = (struct scatterlist *) SCpnt->request_buffer;
cptr = (struct chain *) SCpnt->host_scribble;
if (cptr == NULL) {
/* free the claimed mailbox slot */
HOSTDATA(SCpnt->device->host)->SCint[mbo] = NULL;
return SCSI_MLQUEUE_HOST_BUSY;
}
for (i = 0; i < SCpnt->use_sg; i++) {
if (sgpnt[i].length == 0 || SCpnt->use_sg > 16 ||
(((int) sgpnt[i].offset) & 1) || (sgpnt[i].length & 1)) {
scsi_for_each_sg(SCpnt, sg, SCpnt->use_sg, i) {
if (sg->length == 0 || SCpnt->use_sg > 16 ||
(((int) sg->offset) & 1) || (sg->length & 1)) {
unsigned char *ptr;
printk(KERN_CRIT "Bad segment list supplied to aha1542.c (%d, %d)\n", SCpnt->use_sg, i);
for (i = 0; i < SCpnt->use_sg; i++) {
scsi_for_each_sg(SCpnt, sg, SCpnt->use_sg, i) {
printk(KERN_CRIT "%d: %p %d\n", i,
(page_address(sgpnt[i].page) +
sgpnt[i].offset),
sgpnt[i].length);
(page_address(sg->page) +
sg->offset), sg->length);
};
printk(KERN_CRIT "cptr %x: ", (unsigned int) cptr);
ptr = (unsigned char *) &cptr[i];
@ -723,10 +721,10 @@ static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
printk("%02x ", ptr[i]);
panic("Foooooooood fight!");
};
any2scsi(cptr[i].dataptr, SCSI_SG_PA(&sgpnt[i]));
if (SCSI_SG_PA(&sgpnt[i]) + sgpnt[i].length - 1 > ISA_DMA_THRESHOLD)
BAD_SG_DMA(SCpnt, sgpnt, SCpnt->use_sg, i);
any2scsi(cptr[i].datalen, sgpnt[i].length);
any2scsi(cptr[i].dataptr, SCSI_SG_PA(sg));
if (SCSI_SG_PA(sg) + sg->length - 1 > ISA_DMA_THRESHOLD)
BAD_SG_DMA(SCpnt, sg, SCpnt->use_sg, i);
any2scsi(cptr[i].datalen, sg->length);
};
any2scsi(ccb[mbo].datalen, SCpnt->use_sg * sizeof(struct chain));
any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(cptr));

1
drivers/scsi/aha1740.c
View File

@ -563,6 +563,7 @@ static struct scsi_host_template aha1740_template = {
.sg_tablesize = AHA1740_SCATTER,
.cmd_per_lun = AHA1740_CMDLUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.eh_abort_handler = aha1740_eh_abort_handler,
};

1
drivers/scsi/aic7xxx/aic79xx_osm.c
View File

@ -766,6 +766,7 @@ struct scsi_host_template aic79xx_driver_template = {
.max_sectors = 8192,
.cmd_per_lun = 2,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.slave_alloc = ahd_linux_slave_alloc,
.slave_configure = ahd_linux_slave_configure,
.target_alloc = ahd_linux_target_alloc,

1
drivers/scsi/aic7xxx/aic7xxx_osm.c
View File

@ -747,6 +747,7 @@ struct scsi_host_template aic7xxx_driver_template = {
.max_sectors = 8192,
.cmd_per_lun = 2,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.slave_alloc = ahc_linux_slave_alloc,
.slave_configure = ahc_linux_slave_configure,
.target_alloc = ahc_linux_target_alloc,

1
drivers/scsi/aic7xxx_old.c
View File

@ -11142,6 +11142,7 @@ static struct scsi_host_template driver_template = {
.max_sectors = 2048,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#include "scsi_module.c"

6
drivers/scsi/aic94xx/aic94xx_task.c
View File

@ -94,7 +94,7 @@ static inline int asd_map_scatterlist(struct sas_task *task,
res = -ENOMEM;
goto err_unmap;
}
for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) {
for_each_sg(task->scatter, sc, num_sg, i) {
struct sg_el *sg =
&((struct sg_el *)ascb->sg_arr->vaddr)[i];
sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc));
@ -103,7 +103,7 @@ static inline int asd_map_scatterlist(struct sas_task *task,
sg->flags |= ASD_SG_EL_LIST_EOL;
}
for (sc = task->scatter, i = 0; i < 2; i++, sc++) {
for_each_sg(task->scatter, sc, 2, i) {
sg_arr[i].bus_addr =
cpu_to_le64((u64)sg_dma_address(sc));
sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
@ -115,7 +115,7 @@ static inline int asd_map_scatterlist(struct sas_task *task,
sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle);
} else {
int i;
for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) {
for_each_sg(task->scatter, sc, num_sg, i) {
sg_arr[i].bus_addr =
cpu_to_le64((u64)sg_dma_address(sc));
sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));

1
drivers/scsi/arcmsr/arcmsr_hba.c
View File

@ -122,6 +122,7 @@ static struct scsi_host_template arcmsr_scsi_host_template = {
.max_sectors = ARCMSR_MAX_XFER_SECTORS,
.cmd_per_lun = ARCMSR_MAX_CMD_PERLUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = arcmsr_host_attrs,
};
#ifdef CONFIG_SCSI_ARCMSR_AER

1
drivers/scsi/dc395x.c
View File

@ -4765,6 +4765,7 @@ static struct scsi_host_template dc395x_driver_template = {
.eh_bus_reset_handler = dc395x_eh_bus_reset,
.unchecked_isa_dma = 0,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};

1
drivers/scsi/dpt_i2o.c
View File

@ -3295,6 +3295,7 @@ static struct scsi_host_template adpt_template = {
.this_id = 7,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static s32 adpt_scsi_register(adpt_hba* pHba)

3
drivers/scsi/eata.c
View File

@ -523,7 +523,8 @@ static struct scsi_host_template driver_template = {
.slave_configure = eata2x_slave_configure,
.this_id = 7,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD)

1
drivers/scsi/hosts.c
View File

@ -343,6 +343,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
shost->use_clustering = sht->use_clustering;
shost->ordered_tag = sht->ordered_tag;
shost->active_mode = sht->supported_mode;
shost->use_sg_chaining = sht->use_sg_chaining;
if (sht->max_host_blocked)
shost->max_host_blocked = sht->max_host_blocked;

1
drivers/scsi/hptiop.c
View File

@ -655,6 +655,7 @@ static struct scsi_host_template driver_template = {
.unchecked_isa_dma = 0,
.emulated = 0,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.proc_name = driver_name,
.shost_attrs = hptiop_attrs,
.this_id = -1,

1
drivers/scsi/ibmmca.c
View File

@ -1501,6 +1501,7 @@ static struct scsi_host_template ibmmca_driver_template = {
.sg_tablesize = 16,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int ibmmca_probe(struct device *dev)

1
drivers/scsi/ibmvscsi/ibmvscsi.c
View File

@ -1548,6 +1548,7 @@ static struct scsi_host_template driver_template = {
.this_id = -1,
.sg_tablesize = SG_ALL,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = ibmvscsi_attrs,
};

32
drivers/scsi/ide-scsi.c
View File

@ -70,6 +70,7 @@ typedef struct idescsi_pc_s {
u8 *buffer; /* Data buffer */
u8 *current_position; /* Pointer into the above buffer */
struct scatterlist *sg; /* Scatter gather table */
struct scatterlist *last_sg; /* Last sg element */
int b_count; /* Bytes transferred from current entry */
struct scsi_cmnd *scsi_cmd; /* SCSI command */
void (*done)(struct scsi_cmnd *); /* Scsi completion routine */
@ -173,12 +174,6 @@ static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigne
char *buf;
while (bcount) {
if (pc->sg - scsi_sglist(pc->scsi_cmd) >
scsi_sg_count(pc->scsi_cmd)) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n");
idescsi_discard_data (drive, bcount);
return;
}
count = min(pc->sg->length - pc->b_count, bcount);
if (PageHighMem(pc->sg->page)) {
unsigned long flags;
@ -197,10 +192,17 @@ static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigne
}
bcount -= count; pc->b_count += count;
if (pc->b_count == pc->sg->length) {
pc->sg++;
if (pc->sg == pc->last_sg)
break;
pc->sg = sg_next(pc->sg);
pc->b_count = 0;
}
}
if (bcount) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n");
idescsi_discard_data (drive, bcount);
}
}
static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount)
@ -209,12 +211,6 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign
char *buf;
while (bcount) {
if (pc->sg - scsi_sglist(pc->scsi_cmd) >
scsi_sg_count(pc->scsi_cmd)) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n");
idescsi_output_zeros (drive, bcount);
return;
}
count = min(pc->sg->length - pc->b_count, bcount);
if (PageHighMem(pc->sg->page)) {
unsigned long flags;
@ -233,10 +229,17 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign
}
bcount -= count; pc->b_count += count;
if (pc->b_count == pc->sg->length) {
pc->sg++;
if (pc->sg == pc->last_sg)
break;
pc->sg = sg_next(pc->sg);
pc->b_count = 0;
}
}
if (bcount) {
printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n");
idescsi_output_zeros (drive, bcount);
}
}
static void hexdump(u8 *x, int len)
@ -804,6 +807,7 @@ static int idescsi_queue (struct scsi_cmnd *cmd,
memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
pc->buffer = NULL;
pc->sg = scsi_sglist(cmd);
pc->last_sg = sg_last(pc->sg, cmd->use_sg);
pc->b_count = 0;
pc->request_transfer = pc->buffer_size = scsi_bufflen(cmd);
pc->scsi_cmd = cmd;

1
drivers/scsi/initio.c
View File

@ -2831,6 +2831,7 @@ static struct scsi_host_template initio_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int initio_probe_one(struct pci_dev *pdev,

14
drivers/scsi/ips.c
View File

@ -3252,7 +3252,7 @@ ips_done(ips_ha_t * ha, ips_scb_t * scb)
*/
if ((scb->breakup) || (scb->sg_break)) {
struct scatterlist *sg;
int sg_dma_index, ips_sg_index = 0;
int i, sg_dma_index, ips_sg_index = 0;
/* we had a data breakup */
scb->data_len = 0;
@ -3261,20 +3261,22 @@ ips_done(ips_ha_t * ha, ips_scb_t * scb)
/* Spin forward to last dma chunk */
sg_dma_index = scb->breakup;
for (i = 0; i < scb->breakup; i++)
sg = sg_next(sg);
/* Take care of possible partial on last chunk */
ips_fill_scb_sg_single(ha,
sg_dma_address(&sg[sg_dma_index]),
sg_dma_address(sg),
scb, ips_sg_index++,
sg_dma_len(&sg[sg_dma_index]));
sg_dma_len(sg));
for (; sg_dma_index < scsi_sg_count(scb->scsi_cmd);
sg_dma_index++) {
sg_dma_index++, sg = sg_next(sg)) {
if (ips_fill_scb_sg_single
(ha,
sg_dma_address(&sg[sg_dma_index]),
sg_dma_address(sg),
scb, ips_sg_index++,
sg_dma_len(&sg[sg_dma_index])) < 0)
sg_dma_len(sg)) < 0)
break;
}

2
drivers/scsi/lpfc/lpfc_scsi.c
View File

@ -1438,6 +1438,7 @@ struct scsi_host_template lpfc_template = {
.scan_finished = lpfc_scan_finished,
.this_id = -1,
.sg_tablesize = LPFC_SG_SEG_CNT,
.use_sg_chaining = ENABLE_SG_CHAINING,
.cmd_per_lun = LPFC_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = lpfc_hba_attrs,
@ -1460,6 +1461,7 @@ struct scsi_host_template lpfc_vport_template = {
.sg_tablesize = LPFC_SG_SEG_CNT,
.cmd_per_lun = LPFC_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = lpfc_vport_attrs,
.max_sectors = 0xFFFF,
};

1
drivers/scsi/mac53c94.c
View File

@ -402,6 +402,7 @@ static struct scsi_host_template mac53c94_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int mac53c94_probe(struct macio_dev *mdev, const struct of_device_id *match)

1
drivers/scsi/megaraid.c
View File

@ -4492,6 +4492,7 @@ static struct scsi_host_template megaraid_template = {
.sg_tablesize = MAX_SGLIST,
.cmd_per_lun = DEF_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.eh_abort_handler = megaraid_abort,
.eh_device_reset_handler = megaraid_reset,
.eh_bus_reset_handler = megaraid_reset,

1
drivers/scsi/megaraid/megaraid_mbox.c
View File

@ -361,6 +361,7 @@ static struct scsi_host_template megaraid_template_g = {
.eh_host_reset_handler = megaraid_reset_handler,
.change_queue_depth = megaraid_change_queue_depth,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.sdev_attrs = megaraid_sdev_attrs,
.shost_attrs = megaraid_shost_attrs,
};

1
drivers/scsi/megaraid/megaraid_sas.c
View File

@ -1110,6 +1110,7 @@ static struct scsi_host_template megasas_template = {
.eh_timed_out = megasas_reset_timer,
.bios_param = megasas_bios_param,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
/**

1
drivers/scsi/mesh.c
View File

@ -1843,6 +1843,7 @@ static struct scsi_host_template mesh_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int mesh_probe(struct macio_dev *mdev, const struct of_device_id *match)

1
drivers/scsi/nsp32.c
View File

@ -281,6 +281,7 @@ static struct scsi_host_template nsp32_template = {
.cmd_per_lun = 1,
.this_id = NSP32_HOST_SCSIID,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.eh_abort_handler = nsp32_eh_abort,
.eh_bus_reset_handler = nsp32_eh_bus_reset,
.eh_host_reset_handler = nsp32_eh_host_reset,

1
drivers/scsi/pcmcia/sym53c500_cs.c
View File

@ -694,6 +694,7 @@ static struct scsi_host_template sym53c500_driver_template = {
.sg_tablesize = 32,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = SYM53C500_shost_attrs
};

70
drivers/scsi/qla1280.c
View File

@ -2775,7 +2775,7 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
struct device_reg __iomem *reg = ha->iobase;
struct scsi_cmnd *cmd = sp->cmd;
cmd_a64_entry_t *pkt;
struct scatterlist *sg = NULL;
struct scatterlist *sg = NULL, *s;
__le32 *dword_ptr;
dma_addr_t dma_handle;
int status = 0;
@ -2889,13 +2889,16 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
* Load data segments.
*/
if (seg_cnt) { /* If data transfer. */
int remseg = seg_cnt;
/* Setup packet address segment pointer. */
dword_ptr = (u32 *)&pkt->dseg_0_address;
if (cmd->use_sg) { /* If scatter gather */
/* Load command entry data segments. */
for (cnt = 0; cnt < 2 && seg_cnt; cnt++, seg_cnt--) {
dma_handle = sg_dma_address(sg);
for_each_sg(sg, s, seg_cnt, cnt) {
if (cnt == 2)
break;
dma_handle = sg_dma_address(s);
#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
if (ha->flags.use_pci_vchannel)
sn_pci_set_vchan(ha->pdev,
@ -2906,12 +2909,12 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
cpu_to_le32(pci_dma_lo32(dma_handle));
*dword_ptr++ =
cpu_to_le32(pci_dma_hi32(dma_handle));
*dword_ptr++ = cpu_to_le32(sg_dma_len(sg));
sg++;
*dword_ptr++ = cpu_to_le32(sg_dma_len(s));
dprintk(3, "S/G Segment phys_addr=%x %x, len=0x%x\n",
cpu_to_le32(pci_dma_hi32(dma_handle)),
cpu_to_le32(pci_dma_lo32(dma_handle)),
cpu_to_le32(sg_dma_len(sg)));
cpu_to_le32(sg_dma_len(sg_next(s))));
remseg--;
}
dprintk(5, "qla1280_64bit_start_scsi: Scatter/gather "
"command packet data - b %i, t %i, l %i \n",
@ -2926,7 +2929,9 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
dprintk(3, "S/G Building Continuation...seg_cnt=0x%x "
"remains\n", seg_cnt);
while (seg_cnt > 0) {
while (remseg > 0) {
/* Update sg start */
sg = s;
/* Adjust ring index. */
ha->req_ring_index++;
if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
@ -2952,9 +2957,10 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
(u32 *)&((struct cont_a64_entry *) pkt)->dseg_0_address;
/* Load continuation entry data segments. */
for (cnt = 0; cnt < 5 && seg_cnt;
cnt++, seg_cnt--) {
dma_handle = sg_dma_address(sg);
for_each_sg(sg, s, remseg, cnt) {
if (cnt == 5)
break;
dma_handle = sg_dma_address(s);
#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
if (ha->flags.use_pci_vchannel)
sn_pci_set_vchan(ha->pdev,
@ -2966,13 +2972,13 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
*dword_ptr++ =
cpu_to_le32(pci_dma_hi32(dma_handle));
*dword_ptr++ =
cpu_to_le32(sg_dma_len(sg));
cpu_to_le32(sg_dma_len(s));
dprintk(3, "S/G Segment Cont. phys_addr=%x %x, len=0x%x\n",
cpu_to_le32(pci_dma_hi32(dma_handle)),
cpu_to_le32(pci_dma_lo32(dma_handle)),
cpu_to_le32(sg_dma_len(sg)));
sg++;
cpu_to_le32(sg_dma_len(s)));
}
remseg -= cnt;
dprintk(5, "qla1280_64bit_start_scsi: "
"continuation packet data - b %i, t "
"%i, l %i \n", SCSI_BUS_32(cmd),
@ -3062,7 +3068,7 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
struct device_reg __iomem *reg = ha->iobase;
struct scsi_cmnd *cmd = sp->cmd;
struct cmd_entry *pkt;
struct scatterlist *sg = NULL;
struct scatterlist *sg = NULL, *s;
__le32 *dword_ptr;
int status = 0;
int cnt;
@ -3188,6 +3194,7 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
* Load data segments.
*/
if (seg_cnt) {
int remseg = seg_cnt;
/* Setup packet address segment pointer. */
dword_ptr = &pkt->dseg_0_address;
@ -3196,22 +3203,25 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
qla1280_dump_buffer(1, (char *)sg, 4 * 16);
/* Load command entry data segments. */
for (cnt = 0; cnt < 4 && seg_cnt; cnt++, seg_cnt--) {
for_each_sg(sg, s, seg_cnt, cnt) {
if (cnt == 4)
break;
*dword_ptr++ =
cpu_to_le32(pci_dma_lo32(sg_dma_address(sg)));
*dword_ptr++ =
cpu_to_le32(sg_dma_len(sg));
cpu_to_le32(pci_dma_lo32(sg_dma_address(s)));
*dword_ptr++ = cpu_to_le32(sg_dma_len(s));
dprintk(3, "S/G Segment phys_addr=0x%lx, len=0x%x\n",
(pci_dma_lo32(sg_dma_address(sg))),
(sg_dma_len(sg)));
sg++;
(pci_dma_lo32(sg_dma_address(s))),
(sg_dma_len(s)));
remseg--;
}
/*
* Build continuation packets.
*/
dprintk(3, "S/G Building Continuation"
"...seg_cnt=0x%x remains\n", seg_cnt);
while (seg_cnt > 0) {
while (remseg > 0) {
/* Continue from end point */
sg = s;
/* Adjust ring index. */
ha->req_ring_index++;
if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
@ -3239,19 +3249,20 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
&((struct cont_entry *) pkt)->dseg_0_address;
/* Load continuation entry data segments. */
for (cnt = 0; cnt < 7 && seg_cnt;
cnt++, seg_cnt--) {
for_each_sg(sg, s, remseg, cnt) {
if (cnt == 7)
break;
*dword_ptr++ =
cpu_to_le32(pci_dma_lo32(sg_dma_address(sg)));
cpu_to_le32(pci_dma_lo32(sg_dma_address(s)));
*dword_ptr++ =
cpu_to_le32(sg_dma_len(sg));
cpu_to_le32(sg_dma_len(s));
dprintk(1,
"S/G Segment Cont. phys_addr=0x%x, "
"len=0x%x\n",
cpu_to_le32(pci_dma_lo32(sg_dma_address(sg))),
cpu_to_le32(sg_dma_len(sg)));
sg++;
cpu_to_le32(pci_dma_lo32(sg_dma_address(s))),
cpu_to_le32(sg_dma_len(s)));
}
remseg -= cnt;
dprintk(5, "qla1280_32bit_start_scsi: "
"continuation packet data - "
"scsi(%i:%i:%i)\n", SCSI_BUS_32(cmd),
@ -4248,6 +4259,7 @@ static struct scsi_host_template qla1280_driver_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};

2
drivers/scsi/qla2xxx/qla_os.c
View File

@ -132,6 +132,7 @@ struct scsi_host_template qla2x00_driver_template = {
.this_id = -1,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.sg_tablesize = SG_ALL,
/*
@ -163,6 +164,7 @@ struct scsi_host_template qla24xx_driver_template = {
.this_id = -1,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.sg_tablesize = SG_ALL,
.max_sectors = 0xFFFF,

1
drivers/scsi/qla4xxx/ql4_os.c
View File

@ -94,6 +94,7 @@ static struct scsi_host_template qla4xxx_driver_template = {
.this_id = -1,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.sg_tablesize = SG_ALL,
.max_sectors = 0xFFFF,

1
drivers/scsi/qlogicfas.c
View File

@ -197,6 +197,7 @@ static struct scsi_host_template qlogicfas_driver_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static __init int qlogicfas_init(void)

15
drivers/scsi/qlogicpti.c
View File

@ -868,7 +868,7 @@ static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
{
struct dataseg *ds;
struct scatterlist *sg;
struct scatterlist *sg, *s;
int i, n;
if (Cmnd->use_sg) {
@ -884,11 +884,12 @@ static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
n = sg_count;
if (n > 4)
n = 4;
for (i = 0; i < n; i++, sg++) {
ds[i].d_base = sg_dma_address(sg);
ds[i].d_count = sg_dma_len(sg);
for_each_sg(sg, s, n, i) {
ds[i].d_base = sg_dma_address(s);
ds[i].d_count = sg_dma_len(s);
}
sg_count -= 4;
sg = s;
while (sg_count > 0) {
struct Continuation_Entry *cont;
@ -907,9 +908,9 @@ static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
n = sg_count;
if (n > 7)
n = 7;
for (i = 0; i < n; i++, sg++) {
ds[i].d_base = sg_dma_address(sg);
ds[i].d_count = sg_dma_len(sg);
for_each_sg(sg, s, n, i) {
ds[i].d_base = sg_dma_address(s);
ds[i].d_count = sg_dma_len(s);
}
sg_count -= n;
}

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