linux-toradex.git/drivers/ata/sata_via.c, branch v4.9.67

sata_via: Enable hotplug only on VT6421

2017-10-08T08:26:09+00:00

[ Upstream commit 3cf864520e877505158f09075794a08abab11bbe ]

Commit 57e5568fda27 ("sata_via: Implement hotplug for VT6421") adds
hotplug IRQ handler for VT6421 but enables hotplug on all chips. This
is a bug because it causes "irq xx: nobody cared" error on VT6420 when
hot-(un)plugging a drive:

[  381.839948] irq 20: nobody cared (try booting with the "irqpoll" option)
[  381.840014] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.10.0-rc5+ #148
[  381.840066] Hardware name:          P4VM800/P4VM800, BIOS P1.60 05/29/2006
[  381.840117] Call Trace:
[  381.840167]  
[  381.840225]  ? dump_stack+0x44/0x58
[  381.840278]  ? __report_bad_irq+0x14/0x97
[  381.840327]  ? handle_edge_irq+0xa5/0xa5
[  381.840376]  ? note_interrupt+0x155/0x1cf
[  381.840426]  ? handle_edge_irq+0xa5/0xa5
[  381.840474]  ? handle_irq_event_percpu+0x32/0x38
[  381.840524]  ? handle_irq_event+0x1f/0x38
[  381.840573]  ? handle_fasteoi_irq+0x69/0xb8
[  381.840625]  ? handle_irq+0x4f/0x5d
[  381.840672]  
[  381.840726]  ? do_IRQ+0x2e/0x8b
[  381.840782]  ? common_interrupt+0x2c/0x34
[  381.840836]  ? mwait_idle+0x60/0x82
[  381.840892]  ? arch_cpu_idle+0x6/0x7
[  381.840949]  ? do_idle+0x96/0x18e
[  381.841002]  ? cpu_startup_entry+0x16/0x1a
[  381.841057]  ? start_kernel+0x319/0x31c
[  381.841111]  ? startup_32_smp+0x166/0x168
[  381.841165] handlers:
[  381.841219] [] ata_bmdma_interrupt
[  381.841274] Disabling IRQ #20

Seems that VT6420 can do hotplug too (there's no documentation) but the
comments say that SCR register access (required for detecting hotplug
events) can cause problems on these chips.

For now, just keep hotplug disabled on anything other than VT6421.

Signed-off-by: Ondrej Zary 
Signed-off-by: Tejun Heo 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

sata_via: Implement hotplug for VT6421

2016-02-25T18:22:16+00:00

Enable IRQ on hotplug and add an interrupt handler to handle it.

This allows hotplug to work:
ata5: exception Emask 0x10 SAct 0x0 SErr 0x70000 action 0xe frozen
ata5: SError: { PHYRdyChg PHYInt CommWake }
ata5: hard resetting link
ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
ata5.00: LPM support broken, forcing max_power
ata5.00: ATA-7: WDC WD800JD-75MSA3, 10.01E04, max UDMA/133
ata5.00: 156250000 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata5.00: LPM support broken, forcing max_power
ata5.00: configured for UDMA/133
ata5: EH complete
scsi 4:0:0:0: Direct-Access     ATA      WDC WD800JD-75MS 1E04 PQ: 0 ANSI: 5
sd 4:0:0:0: [sdb] 156250000 512-byte logical blocks: (80.0 GB/74.5 GiB)
sd 4:0:0:0: [sdb] Write Protect is off
sd 4:0:0:0: [sdb] Mode Sense: 00 3a 00 00
sd 4:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 4:0:0:0: Attached scsi generic sg1 type 0
sd 4:0:0:0: [sdb] Attached SCSI disk

And also hot unplug:
ata5: exception Emask 0x10 SAct 0x0 SErr 0x1b0000 action 0xe frozen
ata5: SError: { PHYRdyChg PHYInt 10B8B Dispar }
ata5: hard resetting link
ata5: SATA link down (SStatus 0 SControl 310)
ata5: hard resetting link
ata5: SATA link down (SStatus 0 SControl 310)
ata5: hard resetting link
ata5: SATA link down (SStatus 0 SControl 310)
ata5.00: disabled
ata5: EH complete
ata5.00: detaching (SCSI 4:0:0:0)
sd 4:0:0:0: [sdb] Synchronizing SCSI cache
sd 4:0:0:0: [sdb] Synchronize Cache(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 4:0:0:0: [sdb] Stopping disk
sd 4:0:0:0: [sdb] Start/Stop Unit failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK

Signed-off-by: Ondrej Zary 
Signed-off-by: Tejun Heo

sata_via: Apply WD workaround only when needed on VT6421

2016-02-25T18:17:53+00:00

Currently, workaround for broken WD drives is applied always, slowing
down all drives. And it has a bug - it's not applied after resume.

Apply the workaround only if the error really appears
(SErr == 0x1000500). This allows unaffected drives to run at full speed
(provided that no affected drive is connected to the controller).
Also make sure the workaround is re-applied on resume.

Tested on VT6421.
As SCR registers access is known to cause problems on VT6420 (and I
don't have it to test), keep the workaround applied always on VT6420.

Unaffected drive (Hitachi HDS721680PLA380):
Before:
$ hdparm -t --direct /dev/sdb
/dev/sdb:
 Timing O_DIRECT disk reads: 160 MB in  3.01 seconds =  53.16 MB/sec

After:
$ hdparm -t --direct /dev/sdb
/dev/sdb:
 Timing O_DIRECT disk reads: 200 MB in  3.01 seconds =  66.47 MB/sec

Affected drive (WDC WD5003ABYX-18WERA0):
Before:
$ hdparm -t --direct /dev/sda

/dev/sda:
 Timing O_DIRECT disk reads: 180 MB in  3.02 seconds =  59.51 MB/sec

After:
$ hdparm -t --direct /dev/sdb
/dev/sdb:
 Timing O_DIRECT disk reads: 156 MB in  3.03 seconds =  51.48 MB/sec
$ hdparm -t --direct /dev/sdb
/dev/sdb:
 Timing O_DIRECT disk reads: 180 MB in  3.02 seconds =  59.64 MB/sec

The first hdparm is slower because of the error:
[   50.408042] ata5: Incompatible drive: enabling workaround. This slows down transfer rate to ~60 MB/s
[   50.728052] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
[   50.744834] ata5.00: configured for UDMA/133

Signed-off-by: Ondrej Zary 
Signed-off-by: Tejun Heo

ata: remove deprecated use of pci api

2015-04-08T14:55:05+00:00

Replace occurences of the pci api by appropriate call to the dma api.

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr)

@deprecated@
idexpression id;
position p;
@@

(
  pci_dma_supported@p ( id, ...)
|
  pci_alloc_consistent@p ( id, ...)
)

@bad1@
idexpression id;
position deprecated.p;
@@
...when != &id->dev
   when != pci_get_drvdata ( id )
   when != pci_enable_device ( id )
(
  pci_dma_supported@p ( id, ...)
|
  pci_alloc_consistent@p ( id, ...)
)

@depends on !bad1@
idexpression id;
expression direction;
position deprecated.p;
@@

(
- pci_dma_supported@p ( id,
+ dma_supported ( &id->dev,
...
+ , GFP_ATOMIC
  )
|
- pci_alloc_consistent@p ( id,
+ dma_alloc_coherent ( &id->dev,
...
+ , GFP_ATOMIC
  )
)

Signed-off-by: Quentin Lambert 
Signed-off-by: Tejun Heo

ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers

2014-05-10T02:37:49+00:00

This patch fixes host drivers to use CONFIG_PM_SLEEP instead of CONFIG_PM
where applicable.  Benefits of this change:

* unused code is not being compiled in for CONFIG_PM=y, CONFIG_PM_SLEEP=n
  and CONFIG_PM_RUNTIME=y configurations

* easier transition to use struct dev_pm_ops and SIMPLE_DEV_PM_OPS() in
  the future

* more consistent code (there are host drivers which are using the correct
  CONFIG_PM_SLEEP checks already)

The patch leaves the core libata code and ->port_[suspend,resume] support
in sata_[inic162x,nv,sil24].c alone for now.

Signed-off-by: Bartlomiej Zolnierkiewicz 
Signed-off-by: Tejun Heo

ata: delete non-required instances of include

2014-02-13T21:40:56+00:00

None of these files are actually using any __init type directives
and hence don't need to include .  Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.

Cc: linux-ide@vger.kernel.org
Signed-off-by: Paul Gortmaker 
Signed-off-by: Tejun Heo

libata: update "Maintained by:" tags

2013-05-14T18:13:04+00:00

Jeff moved on to a greener pasture.

 s/Maintained by: Jeff Garzik/Maintained by: Tejun Heo/g

Signed-off-by: Tejun Heo 
Cc: Jeff Garzik

ata: use module_pci_driver

2012-07-25T19:12:11+00:00

This patch converts the drivers in drivers/ata/* to use module_pci_driver()
macro which makes the code smaller and a bit simpler.

Signed-off-by: Axel Lin 
Cc: Alan Cox 
Cc: Jeff Garzik 
Cc: Mikael Pettersson 
Cc: Mark Lord 
Cc: Jeremy Higdon 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Jeff Garzik

ata: sata_via: Use dev_dbg

2011-07-23T21:57:36+00:00

Use normal debugging path for dynamic debug capability.

Convert dev_printk(KERN_DEBUG to dev_dbg(

Signed-off-by: Joe Perches 
Signed-off-by: Jeff Garzik

ata: Add and use ata_print_version_once

2011-07-23T21:57:36+00:00

Use a single mechanism to show driver version.
Reduces text a tiny bit too.

Remove uses of static int printed_version
Add and use ata_print_version(const struct device *, const char *ver)
and ata_print_version_once.

$ size drivers/ata/built-in.*
   text	   data	    bss	    dec	    hex	filename
 544969	  73893	 116584	 735446	  b38d6	drivers/ata/built-in.allyesconfig.ata.o
 543870	  73893	 116592	 734355	  b34ad	drivers/ata/built-in.allyesconfig.print_once.o
 141328	  14689	   4220	 160237	  271ed	drivers/ata/built-in.defconfig.ata.o
 141212	  14689	   4220	 160121	  27179	drivers/ata/built-in.defconfig.print_once.o

Signed-off-by: Joe Perches 
Signed-off-by: Jeff Garzik