linux-toradex.git/drivers/scsi/ipr.h, branch v3.3.4

PCI: Rework config space blocking services

2012-01-06T20:10:33+00:00

pci_block_user_cfg_access was designed for the use case that a single
context, the IPR driver, temporarily delays user space accesses to the
config space via sysfs. This assumption became invalid by the time
pci_dev_reset was added as locking instance. Today, if you run two loops
in parallel that reset the same device via sysfs, you end up with a
kernel BUG as pci_block_user_cfg_access detect the broken assumption.

This reworks the pci_block_user_cfg_access to a sleeping service
pci_cfg_access_lock and an atomic-compatible variant called
pci_cfg_access_trylock. The former not only blocks user space access as
before but also waits if access was already locked. The latter service
just returns false in this case, allowing the caller to resolve the
conflict instead of raising a BUG.

Adaptions of the ipr driver were originally written by Brian King.

Acked-by: Brian King 
Acked-by: Michael S. Tsirkin 
Signed-off-by: Jan Kiszka 
Signed-off-by: Jesse Barnes

[SCSI] ipr: add definitions for additional adapter

2011-10-31T09:12:50+00:00

Add the appropriate definition and table entry for an additional adapter.

Signed-off-by: Wayne Boyer 
Acked-by: Brian King 
Signed-off-by: James Bottomley

[SCSI] ipr: Fix BUG on adapter dump timeout

2011-10-20T15:19:55+00:00

If an adapter dump times out, the ipr driver will abort the
dump and proceed to reset and recover the adapter. When an
adapter dump completes, the work thread which is reading the
adapter dump will initiate an adapter reset to recover the
adapter. However, when the adapter dump gets aborted, the
work thread should not initiate an adapter reset, since an
adapter reset is already in progress. This fixes a case of
calling pci_block_user_cfg_access overlapped, which results
in a BUG.

Signed-off-by: Brian King 
Signed-off-by: James Bottomley

[SCSI] ipr: Add support to flash FPGA and flash back DRAM images

2011-10-16T15:56:27+00:00

The write buffer command is used to download and burn new IOA FW images.
The same interface can now be used to flash FPGA and flash back DRAM images.
To download and flash the new images takes more than 15 minutes, so increase
the write buffer command timeout to 30 minutes.

The FPGA and flash back DRAM images don't have the same card_type as the IOA FW
image. So, remove the sanity checking from the driver.  The adapter has sanity
checking and will only accept a valid image.

Signed-off-by: Wayne Boyer 
Acked-by: Brian King 
Signed-off-by: James Bottomley

[SCSI] ipr: Stop reading adapter dump prematurely

2011-09-22T11:30:28+00:00

When the ipr driver decides to dump the adapter, it changes the
sdt_state to GET_DUMP, then prepares the adapter so that the dump
can be read. However, if the ipr worker thread wakes up for some
reason before the driver has put the adapter in a state where it
can succesfully dump the adapter, the driver will start dumping
the adapter too early, which can potentially trigger a BUG check
in the pci config blocking API. Fix this by adding a new
sdt_state to differentiate between the ipr driver wanting to dump
the adapter in the near future and wanting to dump the adapter now.

Signed-off-by: Brian King 
Signed-off-by: James Bottomley

[SCSI] ipr: Driver version 2.5.2

2011-05-01T17:10:34+00:00

Bump the driver version.

Signed-off-by: Kleber Sacilotto de Souza 
Signed-off-by: James Bottomley

[SCSI] ipr: increase the dump size for 64 bit adapters

2011-05-01T17:09:20+00:00

Currently the size of the dump generated by the driver is limited
in 4MB, which is insufficient to gather much useful data from the
new 64 bit adapters.

This patch makes the needed changes to increase the dump limit
for the 64 bit adapters to 32MB, or even to a bigger value in the
future, but keeping the current limitations for the legacy 32 bit
adapters.

Signed-off-by: Kleber Sacilotto de Souza 
Acked-by: Brian King 
Signed-off-by: James Bottomley

[SCSI] ipr: fix synchronous request flags for better performance

2011-05-01T15:16:44+00:00

In testing it was noticed that Extended Delay after Reset flag was being set
for gscsi and volume set devices.  This had a negative effect on performance
for volume sets.  The fix is to only set the flag for gscsi devices.

Signed-off-by: Wayne Boyer 
Acked-by: Brian King 
Signed-off-by: James Bottomley

[SCSI] ipr: fix mailbox register definition and add a delay before reading

2010-12-21T18:23:55+00:00

The definition for the mailbox register for new adapters was incorrect.  The
value has been updated to the correct offset.

After an adapter reset, the mailbox register on the new adapters takes a
number of seconds to stabilize.  A delay has been added before reading the
register.

Signed-off-by: Wayne Boyer 
Acked-by: Brian King 
Signed-off-by: James Bottomley

[SCSI] ipr: add definitions for a new adapter

2010-10-25T21:29:02+00:00

There was an addition to the hardware roadmap that includes a new adapter.
This patch adds the new definitions for the adapter.

Signed-off-by: Wayne Boyer 
Acked-by: Brian King 
Signed-off-by: James Bottomley