Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1300181 > unrolled thread
| Started by | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| First post | 2016-01-03 06:20 +0100 |
| Last post | 2016-01-07 04:00 +0100 |
| Articles | 20 on this page of 84 — 4 participants |
Back to article view | Back to linux.kernel
[PATCH v4 00/78] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:20 +0100
[PATCH v4 63/78] atari_NCR5380: Remove HOSTNO macro from printk() and seq_printf() calls Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 29/78] ncr5380: Remove references to linked commands Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 73/78] ncr5380: Fix pseudo DMA transfers on 53C400 Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 21/78] ncr5380: Sleep when polling, if possible Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 33/78] atari_NCR5380: Set do_abort() timeouts Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 53/78] ncr5380: Use shost_priv helper Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 62/78] ncr5380: Implement new eh_bus_reset_handler Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 60/78] ncr5380: Implement new eh_abort_handler Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 51/78] ncr5380: Remove command list debug code Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 68/78] ncr5380: Fix trailing whitespace using regexp Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 38/78] ncr5380: Remove UNSAFE macro Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 46/78] ncr5380: Fix NDEBUG_NO_DATAOUT flag Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 47/78] ncr5380: Fix and cleanup scsi_host_template initializers Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 44/78] ncr5380: Fix off-by-one bug in extended_msg[] bounds check Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 55/78] ncr5380: Remove LIST and REMOVE macros Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp Joe Perches <joe@perches.com> - 2016-01-03 09:00 +0100
Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 09:20 +0100
Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-01-03 15:20 +0100
Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp Joe Perches <joe@perches.com> - 2016-01-03 19:30 +0100
Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-01-03 22:40 +0100
Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp Joe Perches <joe@perches.com> - 2016-01-03 22:50 +0100
Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp Joe Perches <joe@perches.com> - 2016-01-03 23:20 +0100
[PATCH v4 71/78] atari_NCR5380: Merge changes from NCR5380.c Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 70/78] ncr5380: Merge changes from atari_NCR5380.c Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 52/78] ncr5380: Remove H_NO macro and introduce dsprintk Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 31/78] ncr5380: Fix !REQ timeout in do_abort() Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 74/78] ncr5380: Use runtime register mapping Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 76/78] ncr5380: Enable PDMA for DTC chips Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 67/78] ncr5380: Cleanup comments Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 39/78] ncr5380: Standardize interrupt handling Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 65/78] atari_scsi, sun3_scsi: Remove global Scsi_Host pointer Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 57/78] ncr5380: Use standard list data structure Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 42/78] ncr5380: Replace READ_OVERRUNS macro with FLAG_NO_DMA_FIXUPS Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 56/78] ncr5380: Remove redundant volatile qualifiers Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 59/78] ncr5380: Fix autosense bugs Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 45/78] ncr5380: Cleanup #include directives Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 75/78] ncr5380: Enable PDMA for NCR53C400A Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 48/78] atari_NCR5380: Fix queue_size limit Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 54/78] ncr5380: Use dsprintk() for queue debugging Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 08/78] ncr5380: Move NCR53C400-specific code Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 35/78] ncr5380: Dont wait for BUS FREE after disconnect Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 10/78] atari_NCR5380: Remove RESET_BOOT, CONFIG_ATARI_SCSI_TOSHIBA_DELAY and CONFIG_ATARI_SCSI_RESET_BOOT Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 58/78] ncr5380: Refactor command completion Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 64/78] atari_NCR5380: Eliminate HOSTNO macro Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 78/78] ncr5380: Add support for HP C2502 Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 72/78] ncr5380: Cleanup whitespace and parentheses Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 77/78] ncr5380: Fix wait for 53C80 registers registers after PDMA Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 61/78] ncr5380: Fix EH during arbitration and selection Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 03/78] ncr5380: Eliminate PDEBUG*, TDEBUG* and DTCDEBUG* macros Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 66/78] ncr5380: Fix soft lockups Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:30 +0100
[PATCH v4 32/78] ncr5380: Fix bus phase in do_abort() Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 06/78] ncr5380: Remove NCR5380_instance_name macro Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 34/78] atari_NCR5380: Use arbitration timeout Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 50/78] ncr5380: Change instance->host_lock to hostdata->lock Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 22/78] ncr5380: Eliminate selecting state Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 27/78] ncr5380: Add missing lock in eh_abort_handler Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 20/78] ncr5380: Introduce unbound workqueue Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 11/78] ncr5380: Simplify bus reset handlers Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 17/78] ncr5380: Keep BSY asserted when entering SELECTION phase Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 05/78] ncr5380: Remove NCR5380_local_declare and NCR5380_setup macros Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 37/78] ncr5380: Standardize work queueing algorithm Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 12/78] ncr5380: Remove unused hostdata->aborted flag Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 49/78] ncr5380: Remove redundant ICR_ARBITRATION_LOST test and eliminate FLAG_DTC3181E Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 28/78] ncr5380: Drop DEF_SCSI_QCMD macro Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 40/78] ncr5380: Introduce NCR5380_poll_politely2 Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 30/78] ncr5380: Add missing break after case MESSAGE_REJECT Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 43/78] ncr5380: Standardize reselection handling Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 26/78] ncr5380: Fix NCR5380_transfer_pio() result Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 19/78] ncr5380: Cleanup bogus {request,release}_region() calls Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 07/78] ncr5380: Split NCR5380_init() into two functions Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 36/78] ncr5380: Use work_struct instead of delayed_work Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 25/78] ncr5380: Rework disconnect versus poll logic Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 09/78] atari_NCR5380: Reset bus on driver initialization if required Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 41/78] ncr5380: Replace redundant flags with FLAG_NO_DMA_FIXUP Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:40 +0100
[PATCH v4 15/78] ncr5380: Always escalate bad target time-out in NCR5380_select() Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:50 +0100
[PATCH v4 01/78] atari_scsi: Fix SCSI host ID setting Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:50 +0100
[PATCH v4 16/78] ncr5380: Proceed with next command after NCR5380_select() calls scsi_done Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:50 +0100
[PATCH v4 14/78] ncr5380: Use return instead of goto in NCR5380_select() Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:50 +0100
[PATCH v4 04/78] ncr5380: Remove more pointless macros Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:50 +0100
[PATCH v4 18/78] ncr5380: Eliminate USLEEP_WAITLONG delay Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:50 +0100
[PATCH v4 02/78] ncr5380: Remove redundant static variable initializers Finn Thain <fthain@telegraphics.com.au> - 2016-01-03 06:50 +0100
Re: [PATCH v4 00/78] More fixes, cleanup and modernization for NCR5380 drivers "Martin K. Petersen" <martin.petersen@oracle.com> - 2016-01-07 04:00 +0100
Page 2 of 5 — ← Prev page 1 [2] 3 4 5 Next page →
| From | Joe Perches <joe@perches.com> |
|---|---|
| Date | 2016-01-03 19:30 +0100 |
| Subject | Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp |
| Message-ID | <qMVzI-vY-3@gated-at.bofh.it> |
| In reply to | #1300309 |
On Sun, 2016-01-03 at 14:10 +0000, One Thousand Gnomes wrote:
> On Sat, 02 Jan 2016 23:54:28 -0800
> Joe Perches <joe@perches.com> wrote:
>
> > On Sun, 2016-01-03 at 16:06 +1100, Finn Thain wrote:
> > > Hanging indentation was a poor choice for the text inside comments. It
> > > has been used in the wrong places and done badly elsewhere. There is
> > > little consistency within any file. One fork of the core driver uses
> > > tabs for this indentation while the other uses spaces. Better to use
> > > flush-left alignment throughout.
> > >
> > > This patch is the result of the following substitution. It replaces tabs
> > > and spaces at the start of a comment line with a single space.
> > >
> > > perl -i -pe 's,^(\t*[/ ]\*)[ \t]+,$1 ,' drivers/scsi/{atari_,}NCR5380.c
> > >
> > > This removes some unimportant discrepancies between the two core driver
> > > forks so that the important ones become obvious, to facilitate
> > > reunification.
> >
> > I still think this patch is poor at best and
> > overall not useful.
>
> I would beg to differ. As a tool for understanding the differences as you
> step through the versions it's invaluable.
This removes intentional formatting that
makes reading comments easier.
diff -w works well.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> |
|---|---|
| Date | 2016-01-03 22:40 +0100 |
| Subject | Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp |
| Message-ID | <qMYxz-2pY-5@gated-at.bofh.it> |
| In reply to | #1300357 |
> > I would beg to differ. As a tool for understanding the differences as you > > step through the versions it's invaluable. > > This removes intentional formatting that > makes reading comments easier. And this matters at the end of the patch series because ? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Joe Perches <joe@perches.com> |
|---|---|
| Date | 2016-01-03 22:50 +0100 |
| Subject | Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp |
| Message-ID | <qMYHg-2vF-11@gated-at.bofh.it> |
| In reply to | #1300391 |
(using an email address for James that shouldn't bounce) On Sun, 2016-01-03 at 21:29 +0000, One Thousand Gnomes wrote: > > > I would beg to differ. As a tool for understanding the > > > differences as you > > > step through the versions it's invaluable. > > > > This removes intentional formatting that > > makes reading comments easier. > > And this matters at the end of the patch series because ? It removes intentional formatting that makes reading comments easier. And diff -w still works just fine. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Joe Perches <joe@perches.com> |
|---|---|
| Date | 2016-01-03 23:20 +0100 |
| Subject | Re: [PATCH v4 69/78] ncr5380: Fix whitespace in comments using regexp |
| Message-ID | <qMZah-31c-1@gated-at.bofh.it> |
| In reply to | #1300398 |
On Sun, 2016-01-03 at 22:05 +0000, One Thousand Gnomes wrote: > On Sun, 03 Jan 2016 13:46:22 -0800 > Joe Perches <joe@perches.com> wrote: > > > (using an email address for James that shouldn't bounce) > > > > On Sun, 2016-01-03 at 21:29 +0000, One Thousand Gnomes wrote: > > > > > I would beg to differ. As a tool for understanding the > > > > > differences as you > > > > > step through the versions it's invaluable. > > > > > > > > This removes intentional formatting that > > > > makes reading comments easier. > > > > > > And this matters at the end of the patch series because ? > > > > It removes intentional formatting that makes > > reading comments easier. > > I'm missing something here - the final result of the merge is completely > and easily readable. Likewise I can work through it and review the code > and compare them for the platform I care about (Mac68K) > > > And diff -w still works just fine. > > So you think 70+ patches should be redone because of that, when the end > result is a clean driver anyway ??? Nope, I think patch 69 should simply not be applied. I don't know and don't care if patches 70 through 78 depend on any changes made by patch 69. I'd expect no dependencies exist though. It doesn't matter much in any case. cheers, Joe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 71/78] atari_NCR5380: Merge changes from NCR5380.c |
| Message-ID | <qMJoT-1cG-33@gated-at.bofh.it> |
| In reply to | #1300181 |
In the past, atari_NCR5380.c was overlooked by those working on NCR5380.c
and this caused needless divergence. All of the changes in this patch were
taken from NCR5380.c.
This removes some unimportant discrepancies between the two core driver
forks so that 'diff' can be used to reveal the important ones, to
facilitate reunification.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
drivers/scsi/atari_NCR5380.c | 84 ++++++++++++++++++++++++++-----------------
1 file changed, 52 insertions(+), 32 deletions(-)
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:44.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:48.000000000 +1100
@@ -443,22 +443,39 @@ static struct {
unsigned char mask;
const char *name;
} signals[] = {
- { SR_DBP, "PARITY"}, { SR_RST, "RST" }, { SR_BSY, "BSY" },
- { SR_REQ, "REQ" }, { SR_MSG, "MSG" }, { SR_CD, "CD" }, { SR_IO, "IO" },
- { SR_SEL, "SEL" }, {0, NULL}
-}, basrs[] = {
- {BASR_ATN, "ATN"}, {BASR_ACK, "ACK"}, {0, NULL}
-}, icrs[] = {
- {ICR_ASSERT_RST, "ASSERT RST"},{ICR_ASSERT_ACK, "ASSERT ACK"},
- {ICR_ASSERT_BSY, "ASSERT BSY"}, {ICR_ASSERT_SEL, "ASSERT SEL"},
- {ICR_ASSERT_ATN, "ASSERT ATN"}, {ICR_ASSERT_DATA, "ASSERT DATA"},
+ {SR_DBP, "PARITY"},
+ {SR_RST, "RST"},
+ {SR_BSY, "BSY"},
+ {SR_REQ, "REQ"},
+ {SR_MSG, "MSG"},
+ {SR_CD, "CD"},
+ {SR_IO, "IO"},
+ {SR_SEL, "SEL"},
{0, NULL}
-}, mrs[] = {
- {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"}, {MR_TARGET, "MODE TARGET"},
- {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"}, {MR_ENABLE_PAR_INTR,
- "MODE PARITY INTR"}, {MR_ENABLE_EOP_INTR,"MODE EOP INTR"},
+},
+basrs[] = {
+ {BASR_ATN, "ATN"},
+ {BASR_ACK, "ACK"},
+ {0, NULL}
+},
+icrs[] = {
+ {ICR_ASSERT_RST, "ASSERT RST"},
+ {ICR_ASSERT_ACK, "ASSERT ACK"},
+ {ICR_ASSERT_BSY, "ASSERT BSY"},
+ {ICR_ASSERT_SEL, "ASSERT SEL"},
+ {ICR_ASSERT_ATN, "ASSERT ATN"},
+ {ICR_ASSERT_DATA, "ASSERT DATA"},
+ {0, NULL}
+},
+mrs[] = {
+ {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"},
+ {MR_TARGET, "MODE TARGET"},
+ {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
+ {MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
+ {MR_ENABLE_EOP_INTR, "MODE EOP INTR"},
{MR_MONITOR_BSY, "MODE MONITOR BSY"},
- {MR_DMA_MODE, "MODE DMA"}, {MR_ARBITRATE, "MODE ARBITRATION"},
+ {MR_DMA_MODE, "MODE DMA"},
+ {MR_ARBITRATE, "MODE ARBITRATION"},
{0, NULL}
};
@@ -502,8 +519,12 @@ static struct {
unsigned char value;
const char *name;
} phases[] = {
- {PHASE_DATAOUT, "DATAOUT"}, {PHASE_DATAIN, "DATAIN"}, {PHASE_CMDOUT, "CMDOUT"},
- {PHASE_STATIN, "STATIN"}, {PHASE_MSGOUT, "MSGOUT"}, {PHASE_MSGIN, "MSGIN"},
+ {PHASE_DATAOUT, "DATAOUT"},
+ {PHASE_DATAIN, "DATAIN"},
+ {PHASE_CMDOUT, "CMDOUT"},
+ {PHASE_STATIN, "STATIN"},
+ {PHASE_MSGOUT, "MSGOUT"},
+ {PHASE_MSGIN, "MSGIN"},
{PHASE_UNKNOWN, "UNKNOWN"}
};
@@ -529,7 +550,6 @@ static void NCR5380_print_phase(struct S
shost_printk(KERN_DEBUG, instance, "phase %s\n", phases[i].name);
}
}
-
#endif
/**
@@ -1488,9 +1508,9 @@ static int NCR5380_transfer_pio(struct S
unsigned char *phase, int *count,
unsigned char **data)
{
- register unsigned char p = *phase, tmp;
- register int c = *count;
- register unsigned char *d = *data;
+ unsigned char p = *phase, tmp;
+ int c = *count;
+ unsigned char *d = *data;
/*
* The NCR5380 chip will only drive the SCSI bus when the
@@ -1557,17 +1577,17 @@ static int NCR5380_transfer_pio(struct S
dsprintk(NDEBUG_HANDSHAKE, instance, "REQ negated, handshake complete\n");
- /*
- * We have several special cases to consider during REQ/ACK handshaking :
- * 1. We were in MSGOUT phase, and we are on the last byte of the
- * message. ATN must be dropped as ACK is dropped.
- *
- * 2. We are in a MSGIN phase, and we are on the last byte of the
- * message. We must exit with ACK asserted, so that the calling
- * code may raise ATN before dropping ACK to reject the message.
- *
- * 3. ACK and ATN are clear and the target may proceed as normal.
- */
+/*
+ * We have several special cases to consider during REQ/ACK handshaking :
+ * 1. We were in MSGOUT phase, and we are on the last byte of the
+ * message. ATN must be dropped as ACK is dropped.
+ *
+ * 2. We are in a MSGIN phase, and we are on the last byte of the
+ * message. We must exit with ACK asserted, so that the calling
+ * code may raise ATN before dropping ACK to reject the message.
+ *
+ * 3. ACK and ATN are clear and the target may proceed as normal.
+ */
if (!(p == PHASE_MSGIN && c == 1)) {
if (p == PHASE_MSGOUT && c > 1)
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
@@ -1632,7 +1652,7 @@ static void do_reset(struct Scsi_Host *i
static int do_abort(struct Scsi_Host *instance)
{
- unsigned char tmp, *msgptr, phase;
+ unsigned char *msgptr, phase, tmp;
int len;
int rc;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 70/78] ncr5380: Merge changes from atari_NCR5380.c |
| Message-ID | <qMJoU-1cG-45@gated-at.bofh.it> |
| In reply to | #1300181 |
In the past, NCR5380.c was overlooked by those working on atari_NCR5380.c
and this caused needless divergence. All of the changes in this patch were
taken from atari_NCR5380.c.
This removes some unimportant discrepancies between the two core driver
forks so that 'diff' can be used to reveal the important ones, to
facilitate reunification.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
---
drivers/scsi/NCR5380.c | 155 +++++++++++++++++++++++++++----------------------
1 file changed, 87 insertions(+), 68 deletions(-)
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2016-01-03 16:04:44.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2016-01-03 16:04:46.000000000 +1100
@@ -174,7 +174,7 @@ static int do_abort(struct Scsi_Host *);
static void do_reset(struct Scsi_Host *);
/**
- * initialize_SCp - init the scsi pointer field
+ * initialize_SCp - init the scsi pointer field
* @cmd: command block to set up
*
* Set up the internal fields in the SCSI command.
@@ -264,19 +264,6 @@ static inline int NCR5380_poll_politely(
reg, bit, val, wait);
}
-static struct {
- unsigned char value;
- const char *name;
-} phases[] __maybe_unused = {
- {PHASE_DATAOUT, "DATAOUT"},
- {PHASE_DATAIN, "DATAIN"},
- {PHASE_CMDOUT, "CMDOUT"},
- {PHASE_STATIN, "STATIN"},
- {PHASE_MSGOUT, "MSGOUT"},
- {PHASE_MSGIN, "MSGIN"},
- {PHASE_UNKNOWN, "UNKNOWN"}
-};
-
#if NDEBUG
static struct {
unsigned char mask;
@@ -311,6 +298,7 @@ mrs[] = {
{MR_TARGET, "MODE TARGET"},
{MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
{MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
+ {MR_ENABLE_EOP_INTR, "MODE EOP INTR"},
{MR_MONITOR_BSY, "MODE MONITOR BSY"},
{MR_DMA_MODE, "MODE DMA"},
{MR_ARBITRATE, "MODE ARBITRATION"},
@@ -318,8 +306,8 @@ mrs[] = {
};
/**
- * NCR5380_print - print scsi bus signals
- * @instance: adapter state to dump
+ * NCR5380_print - print scsi bus signals
+ * @instance: adapter state to dump
*
* Print the SCSI bus signals for debugging purposes
*/
@@ -353,9 +341,21 @@ static void NCR5380_print(struct Scsi_Ho
printk("\n");
}
+static struct {
+ unsigned char value;
+ const char *name;
+} phases[] = {
+ {PHASE_DATAOUT, "DATAOUT"},
+ {PHASE_DATAIN, "DATAIN"},
+ {PHASE_CMDOUT, "CMDOUT"},
+ {PHASE_STATIN, "STATIN"},
+ {PHASE_MSGOUT, "MSGOUT"},
+ {PHASE_MSGIN, "MSGIN"},
+ {PHASE_UNKNOWN, "UNKNOWN"}
+};
/**
- * NCR5380_print_phase - show SCSI phase
+ * NCR5380_print_phase - show SCSI phase
* @instance: adapter to dump
*
* Print the current SCSI phase for debugging purposes
@@ -370,7 +370,9 @@ static void NCR5380_print_phase(struct S
if (!(status & SR_REQ))
shost_printk(KERN_DEBUG, instance, "REQ not asserted, phase unknown.\n");
else {
- for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
+ for (i = 0; (phases[i].value != PHASE_UNKNOWN) &&
+ (phases[i].value != (status & PHASE_MASK)); ++i)
+ ;
shost_printk(KERN_DEBUG, instance, "phase %s\n", phases[i].name);
}
}
@@ -511,7 +513,7 @@ static int __maybe_unused NCR5380_write_
}
static int __maybe_unused NCR5380_show_info(struct seq_file *m,
- struct Scsi_Host *instance)
+ struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
@@ -522,7 +524,7 @@ static int __maybe_unused NCR5380_show_i
#endif
/**
- * NCR5380_init - initialise an NCR5380
+ * NCR5380_init - initialise an NCR5380
* @instance: adapter to configure
* @flags: control flags
*
@@ -530,7 +532,7 @@ static int __maybe_unused NCR5380_show_i
* with flags OR'd into the initial flags value.
*
* Notes : I assume that the host, hostno, and id bits have been
- * set correctly. I don't care about the irq and other fields.
+ * set correctly. I don't care about the irq and other fields.
*
* Returns 0 for success
*/
@@ -541,10 +543,9 @@ static int NCR5380_init(struct Scsi_Host
int i;
unsigned long deadline;
- if(in_interrupt())
- printk(KERN_ERR "NCR5380_init called with interrupts off!\n");
-
+ hostdata->host = instance;
hostdata->id_mask = 1 << instance->this_id;
+ hostdata->id_higher_mask = 0;
for (i = hostdata->id_mask; i <= 0x80; i <<= 1)
if (i > hostdata->id_mask)
hostdata->id_higher_mask |= i;
@@ -569,8 +570,6 @@ static int NCR5380_init(struct Scsi_Host
if (!hostdata->work_q)
return -ENOMEM;
- hostdata->host = instance;
-
prepare_info(instance);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
@@ -648,8 +647,10 @@ static int NCR5380_maybe_reset_bus(struc
}
/**
- * NCR5380_exit - remove an NCR5380
+ * NCR5380_exit - remove an NCR5380
* @instance: adapter to remove
+ *
+ * Assumes that no more work can be queued (e.g. by NCR5380_intr).
*/
static void NCR5380_exit(struct Scsi_Host *instance)
@@ -714,7 +715,7 @@ static int NCR5380_queue_command(struct
cmd->scsi_done(cmd);
return 0;
}
-#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
+#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
cmd->result = 0;
@@ -801,7 +802,7 @@ static void requeue_cmd(struct Scsi_Host
}
/**
- * NCR5380_main - NCR state machines
+ * NCR5380_main - NCR state machines
*
* NCR5380_main is a coroutine that runs as long as more work can
* be done on the NCR5380 host adapters in a system. Both
@@ -1067,7 +1068,9 @@ static struct scsi_cmnd *NCR5380_select(
udelay(3);
/* Check for lost arbitration */
- if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) || (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) || (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
+ if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) ||
+ (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) ||
+ (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
NCR5380_write(MODE_REG, MR_BASE);
dsprintk(NDEBUG_ARBITRATION, instance, "lost arbitration, deasserting MR_ARBITRATE\n");
spin_lock_irq(&hostdata->lock);
@@ -1133,7 +1136,7 @@ static struct scsi_cmnd *NCR5380_select(
* The initiator shall then wait at least two deskew delays and release
* the BSY signal.
*/
- udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */
+ udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */
/* Reset BSY */
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
@@ -1270,7 +1273,7 @@ out:
* bytes to transfer, **data - pointer to data pointer.
*
* Returns : -1 when different phase is entered without transferring
- * maximum number of bytes, 0 if all bytes or transferred or exit
+ * maximum number of bytes, 0 if all bytes are transferred or exit
* is in same phase.
*
* Also, *phase, *count, *data are modified in place.
@@ -1284,7 +1287,10 @@ out:
* counts, we will always do a pseudo DMA or DMA transfer.
*/
-static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) {
+static int NCR5380_transfer_pio(struct Scsi_Host *instance,
+ unsigned char *phase, int *count,
+ unsigned char **data)
+{
unsigned char p = *phase, tmp;
int c = *count;
unsigned char *d = *data;
@@ -1295,7 +1301,7 @@ static int NCR5380_transfer_pio(struct S
* REGISTER match the STATUS REGISTER
*/
- NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
+ NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
do {
/*
@@ -1314,6 +1320,7 @@ static int NCR5380_transfer_pio(struct S
NCR5380_dprint_phase(NDEBUG_PIO, instance);
break;
}
+
/* Do actual transfer from SCSI bus to / from memory */
if (!(p & SR_IO))
NCR5380_write(OUTPUT_DATA_REG, *d);
@@ -1451,12 +1458,14 @@ static int do_abort(struct Scsi_Host *in
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
if (tmp != PHASE_MSGOUT) {
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
+ NCR5380_write(INITIATOR_COMMAND_REG,
+ ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 3 * HZ);
if (rc < 0)
goto timeout;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
}
+
tmp = ABORT;
msgptr = &tmp;
len = 1;
@@ -1495,7 +1504,11 @@ timeout:
*/
-static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) {
+static int NCR5380_transfer_dma(struct Scsi_Host *instance,
+ unsigned char *phase, int *count,
+ unsigned char **data)
+{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
register int c = *count;
register unsigned char p = *phase;
register unsigned char *d = *data;
@@ -1506,8 +1519,6 @@ static int NCR5380_transfer_dma(struct S
unsigned char saved_data = 0, overrun = 0, residue;
#endif
- struct NCR5380_hostdata *hostdata = shost_priv(instance);
-
if ((tmp = (NCR5380_read(STATUS_REG) & PHASE_MASK)) != p) {
*phase = tmp;
return -1;
@@ -1737,7 +1748,8 @@ static int NCR5380_transfer_dma(struct S
* to recover from an unexpected bus free condition.
*/
-static void NCR5380_information_transfer(struct Scsi_Host *instance) {
+static void NCR5380_information_transfer(struct Scsi_Host *instance)
+{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char msgout = NOP;
int sink = 0;
@@ -1764,11 +1776,13 @@ static void NCR5380_information_transfer
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
- while (NCR5380_read(STATUS_REG) & SR_REQ);
+ while (NCR5380_read(STATUS_REG) & SR_REQ)
+ ;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
sink = 0;
continue;
}
+
switch (phase) {
case PHASE_DATAOUT:
#if (NDEBUG & NDEBUG_NO_DATAOUT)
@@ -1794,6 +1808,7 @@ static void NCR5380_information_transfer
cmd->SCp.this_residual,
cmd->SCp.buffers_residual);
}
+
/*
* The preferred transfer method is going to be
* PSEUDO-DMA for systems that are strictly PIO,
@@ -1812,13 +1827,15 @@ static void NCR5380_information_transfer
if (transfersize) {
len = transfersize;
- if (NCR5380_transfer_dma(instance, &phase, &len, (unsigned char **) &cmd->SCp.ptr)) {
+ if (NCR5380_transfer_dma(instance, &phase,
+ &len, (unsigned char **)&cmd->SCp.ptr)) {
/*
- * If the watchdog timer fires, all future accesses to this
- * device will use the polled-IO.
+ * If the watchdog timer fires, all future
+ * accesses to this device will use the
+ * polled-IO.
*/
scmd_printk(KERN_INFO, cmd,
- "switching to slow handshake\n");
+ "switching to slow handshake\n");
cmd->device->borken = 1;
sink = 1;
do_abort(instance);
@@ -1894,25 +1911,24 @@ static void NCR5380_information_transfer
break;
}
break;
- case DISCONNECT:{
- /* Accept message by clearing ACK */
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- hostdata->connected = NULL;
- list_add(&ncmd->list, &hostdata->disconnected);
- dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES,
- instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
- cmd, scmd_id(cmd), cmd->device->lun);
+ case DISCONNECT:
+ /* Accept message by clearing ACK */
+ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+ hostdata->connected = NULL;
+ list_add(&ncmd->list, &hostdata->disconnected);
+ dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES,
+ instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
+ cmd, scmd_id(cmd), cmd->device->lun);
- /*
- * Restore phase bits to 0 so an interrupted selection,
- * arbitration can resume.
- */
- NCR5380_write(TARGET_COMMAND_REG, 0);
+ /*
+ * Restore phase bits to 0 so an interrupted selection,
+ * arbitration can resume.
+ */
+ NCR5380_write(TARGET_COMMAND_REG, 0);
- /* Enable reselect interrupts */
- NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
- return;
- }
+ /* Enable reselect interrupts */
+ NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
+ return;
/*
* The SCSI data pointer is *IMPLICITLY* saved on a disconnect
* operation, in violation of the SCSI spec so we can safely
@@ -1994,15 +2010,17 @@ static void NCR5380_information_transfer
printk("\n");
} else if (tmp != EXTENDED_MESSAGE)
scmd_printk(KERN_INFO, cmd,
- "rejecting unknown message %02x\n",tmp);
+ "rejecting unknown message %02x\n",
+ tmp);
else
scmd_printk(KERN_INFO, cmd,
- "rejecting unknown extended message code %02x, length %d\n", extended_msg[1], extended_msg[0]);
+ "rejecting unknown extended message code %02x, length %d\n",
+ extended_msg[1], extended_msg[0]);
msgout = MESSAGE_REJECT;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
break;
- } /* switch (tmp) */
+ } /* switch (tmp) */
break;
case PHASE_MSGOUT:
len = 1;
@@ -2037,7 +2055,7 @@ static void NCR5380_information_transfer
default:
shost_printk(KERN_ERR, instance, "unknown phase\n");
NCR5380_dprint(NDEBUG_ANY, instance);
- } /* switch(phase) */
+ } /* switch(phase) */
} else {
spin_unlock_irq(&hostdata->lock);
NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
@@ -2056,7 +2074,8 @@ static void NCR5380_information_transfer
* Inputs : instance - this instance of the NCR5380.
*/
-static void NCR5380_reselect(struct Scsi_Host *instance) {
+static void NCR5380_reselect(struct Scsi_Host *instance)
+{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char target_mask;
unsigned char lun, phase;
@@ -2153,8 +2172,8 @@ static void NCR5380_reselect(struct Scsi
shost_printk(KERN_ERR, instance, "target bitmask 0x%02x lun %d not in disconnected queue.\n",
target_mask, lun);
/*
- * Since we have an established nexus that we can't do anything with,
- * we must abort it.
+ * Since we have an established nexus that we can't do anything
+ * with, we must abort it.
*/
do_abort(instance);
return;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 52/78] ncr5380: Remove H_NO macro and introduce dsprintk |
| Message-ID | <qMJoT-1cG-35@gated-at.bofh.it> |
| In reply to | #1300181 |
Replace all H_NO and some HOSTNO macros (both peculiar to atari_NCR5380.c)
with a new dsprintk macro that's more useful and more consistent. The new
macro avoids a lot of boilerplate in new code in subsequent patches. Keep
NCR5380.c in sync. Remaining HOSTNO macros are removed as side-effects
of subsequent patches.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
drivers/scsi/NCR5380.c | 9 ++++---
drivers/scsi/NCR5380.h | 5 +++
drivers/scsi/atari_NCR5380.c | 54 +++++++++++++++++++++----------------------
3 files changed, 38 insertions(+), 30 deletions(-)
Index: linux/drivers/scsi/NCR5380.h
===================================================================
--- linux.orig/drivers/scsi/NCR5380.h 2016-01-03 16:04:09.000000000 +1100
+++ linux/drivers/scsi/NCR5380.h 2016-01-03 16:04:14.000000000 +1100
@@ -285,6 +285,11 @@ struct NCR5380_hostdata {
do { if ((NDEBUG) & (flg)) \
printk(KERN_DEBUG fmt, ## __VA_ARGS__); } while (0)
+#define dsprintk(flg, host, fmt, ...) \
+ do { if ((NDEBUG) & (flg)) \
+ shost_printk(KERN_DEBUG, host, fmt, ## __VA_ARGS__); \
+ } while (0)
+
#if NDEBUG
#define NCR5380_dprint(flg, arg) \
do { if ((NDEBUG) & (flg)) NCR5380_print(arg); } while (0)
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:12.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:14.000000000 +1100
@@ -207,7 +207,6 @@
#define NEXTADDR(cmd) ((struct scsi_cmnd **)&(cmd)->host_scribble)
#define HOSTNO instance->host_no
-#define H_NO(cmd) (cmd)->device->host->host_no
static int do_abort(struct Scsi_Host *);
static void do_reset(struct Scsi_Host *);
@@ -280,7 +279,8 @@ static void __init init_tags(struct NCR5
static int is_lun_busy(struct scsi_cmnd *cmd, int should_be_tagged)
{
u8 lun = cmd->device->lun;
- SETUP_HOSTDATA(cmd->device->host);
+ struct Scsi_Host *instance = cmd->device->host;
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
if (hostdata->busy[cmd->device->id] & (1 << lun))
return 1;
@@ -290,8 +290,8 @@ static int is_lun_busy(struct scsi_cmnd
return 0;
if (hostdata->TagAlloc[scmd_id(cmd)][lun].nr_allocated >=
hostdata->TagAlloc[scmd_id(cmd)][lun].queue_size) {
- dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d: no free tags\n",
- H_NO(cmd), cmd->device->id, lun);
+ dsprintk(NDEBUG_TAGS, instance, "target %d lun %d: no free tags\n",
+ scmd_id(cmd), lun);
return 1;
}
return 0;
@@ -306,7 +306,8 @@ static int is_lun_busy(struct scsi_cmnd
static void cmd_get_tag(struct scsi_cmnd *cmd, int should_be_tagged)
{
u8 lun = cmd->device->lun;
- SETUP_HOSTDATA(cmd->device->host);
+ struct Scsi_Host *instance = cmd->device->host;
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
/* If we or the target don't support tagged queuing, allocate the LUN for
* an untagged command.
@@ -316,18 +317,16 @@ static void cmd_get_tag(struct scsi_cmnd
!cmd->device->tagged_supported) {
cmd->tag = TAG_NONE;
hostdata->busy[cmd->device->id] |= (1 << lun);
- dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d now allocated by untagged "
- "command\n", H_NO(cmd), cmd->device->id, lun);
+ dsprintk(NDEBUG_TAGS, instance, "target %d lun %d now allocated by untagged command\n",
+ scmd_id(cmd), lun);
} else {
struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun];
cmd->tag = find_first_zero_bit(ta->allocated, MAX_TAGS);
set_bit(cmd->tag, ta->allocated);
ta->nr_allocated++;
- dprintk(NDEBUG_TAGS, "scsi%d: using tag %d for target %d lun %d "
- "(now %d tags in use)\n",
- H_NO(cmd), cmd->tag, cmd->device->id,
- lun, ta->nr_allocated);
+ dsprintk(NDEBUG_TAGS, instance, "using tag %d for target %d lun %d (%d tags allocated)\n",
+ cmd->tag, scmd_id(cmd), lun, ta->nr_allocated);
}
}
@@ -339,21 +338,22 @@ static void cmd_get_tag(struct scsi_cmnd
static void cmd_free_tag(struct scsi_cmnd *cmd)
{
u8 lun = cmd->device->lun;
- SETUP_HOSTDATA(cmd->device->host);
+ struct Scsi_Host *instance = cmd->device->host;
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
if (cmd->tag == TAG_NONE) {
hostdata->busy[cmd->device->id] &= ~(1 << lun);
- dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d untagged cmd finished\n",
- H_NO(cmd), cmd->device->id, lun);
+ dsprintk(NDEBUG_TAGS, instance, "target %d lun %d untagged cmd freed\n",
+ scmd_id(cmd), lun);
} else if (cmd->tag >= MAX_TAGS) {
- printk(KERN_NOTICE "scsi%d: trying to free bad tag %d!\n",
- H_NO(cmd), cmd->tag);
+ shost_printk(KERN_NOTICE, instance,
+ "trying to free bad tag %d!\n", cmd->tag);
} else {
struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun];
clear_bit(cmd->tag, ta->allocated);
ta->nr_allocated--;
- dprintk(NDEBUG_TAGS, "scsi%d: freed tag %d for target %d lun %d\n",
- H_NO(cmd), cmd->tag, cmd->device->id, lun);
+ dsprintk(NDEBUG_TAGS, instance, "freed tag %d for target %d lun %d\n",
+ cmd->tag, scmd_id(cmd), lun);
}
}
@@ -815,8 +815,7 @@ static int NCR5380_queue_command(struct
switch (cmd->cmnd[0]) {
case WRITE_6:
case WRITE_10:
- printk(KERN_NOTICE "scsi%d: WRITE attempted with NO_WRITE debugging flag set\n",
- H_NO(cmd));
+ shost_printk(KERN_DEBUG, instance, "WRITE attempted with NDEBUG_NO_WRITE set\n");
cmd->result = (DID_ERROR << 16);
cmd->scsi_done(cmd);
return 0;
@@ -875,8 +874,8 @@ static int NCR5380_queue_command(struct
}
spin_unlock_irqrestore(&hostdata->lock, flags);
- dprintk(NDEBUG_QUEUES, "scsi%d: command added to %s of queue\n", H_NO(cmd),
- (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
+ dsprintk(NDEBUG_QUEUES, instance, "command %p added to %s of queue\n",
+ cmd, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
/* Kick off command processing */
queue_work(hostdata->work_q, &hostdata->main_task);
@@ -2079,8 +2078,9 @@ static void NCR5380_information_transfer
LIST(cmd,hostdata->issue_queue);
SET_NEXT(cmd, hostdata->issue_queue);
hostdata->issue_queue = (struct scsi_cmnd *) cmd;
- dprintk(NDEBUG_QUEUES, "scsi%d: REQUEST SENSE added to head of "
- "issue queue\n", H_NO(cmd));
+ dsprintk(NDEBUG_QUEUES, instance,
+ "REQUEST SENSE cmd %p added to head of issue queue\n",
+ cmd);
} else {
cmd->scsi_done(cmd);
}
@@ -2746,11 +2746,11 @@ static int NCR5380_bus_reset(struct scsi
*/
if (hostdata->issue_queue)
- dprintk(NDEBUG_ABORT, "scsi%d: reset aborted issued command(s)\n", H_NO(cmd));
+ dsprintk(NDEBUG_ABORT, instance, "reset aborted issued command(s)\n");
if (hostdata->connected)
- dprintk(NDEBUG_ABORT, "scsi%d: reset aborted a connected command\n", H_NO(cmd));
+ dsprintk(NDEBUG_ABORT, instance, "reset aborted a connected command\n");
if (hostdata->disconnected_queue)
- dprintk(NDEBUG_ABORT, "scsi%d: reset aborted disconnected command(s)\n", H_NO(cmd));
+ dsprintk(NDEBUG_ABORT, instance, "reset aborted disconnected command(s)\n");
hostdata->issue_queue = NULL;
hostdata->connected = NULL;
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2016-01-03 16:04:12.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2016-01-03 16:04:14.000000000 +1100
@@ -755,7 +755,7 @@ static int NCR5380_queue_command(struct
switch (cmd->cmnd[0]) {
case WRITE_6:
case WRITE_10:
- printk("scsi%d : WRITE attempted with NO_WRITE debugging flag set\n", instance->host_no);
+ shost_printk(KERN_DEBUG, instance, "WRITE attempted with NDEBUG_NO_WRITE set\n");
cmd->result = (DID_ERROR << 16);
cmd->scsi_done(cmd);
return 0;
@@ -790,7 +790,8 @@ static int NCR5380_queue_command(struct
}
spin_unlock_irqrestore(&hostdata->lock, flags);
- dprintk(NDEBUG_QUEUES, "scsi%d : command added to %s of queue\n", instance->host_no, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
+ dsprintk(NDEBUG_QUEUES, instance, "command %p added to %s of queue\n",
+ cmd, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
/* Kick off command processing */
queue_work(hostdata->work_q, &hostdata->main_task);
@@ -1888,7 +1889,9 @@ static void NCR5380_information_transfer
cmd->host_scribble = (unsigned char *)
hostdata->issue_queue;
hostdata->issue_queue = (struct scsi_cmnd *) cmd;
- dprintk(NDEBUG_QUEUES, "scsi%d : REQUEST SENSE added to head of issue queue\n", instance->host_no);
+ dsprintk(NDEBUG_QUEUES, instance,
+ "REQUEST SENSE cmd %p added to head of issue queue\n",
+ cmd);
} else {
cmd->scsi_done(cmd);
}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 31/78] ncr5380: Fix !REQ timeout in do_abort() |
| Message-ID | <qMJoU-1cG-51@gated-at.bofh.it> |
| In reply to | #1300181 |
NCR5380_poll_politely() never returns -1. That means do_abort() can fail
to handle a timeout after waiting for the target to negate REQ. Fix this
and cleanup other NCR5380_poll_politely() call sites.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
---
drivers/scsi/NCR5380.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2016-01-03 16:03:40.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2016-01-03 16:03:41.000000000 +1100
@@ -1271,7 +1271,7 @@ static int NCR5380_select(struct Scsi_Ho
err = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
spin_lock_irq(instance->host_lock);
- if(err) {
+ if (err < 0) {
printk(KERN_ERR "scsi%d: timeout at NCR5380.c:%d\n", instance->host_no, __LINE__);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return -1;
@@ -1490,8 +1490,7 @@ static int do_abort(struct Scsi_Host *in
*/
rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 60 * HZ);
-
- if(rc < 0)
+ if (rc < 0)
return -1;
tmp = (unsigned char)rc;
@@ -1502,7 +1501,7 @@ static int do_abort(struct Scsi_Host *in
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 3 * HZ);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
- if(rc == -1)
+ if (rc < 0)
return -1;
}
tmp = ABORT;
@@ -2199,7 +2198,8 @@ static void NCR5380_reselect(struct Scsi
* FIXME: timeout needed and fail to work queeu
*/
- if(NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 2*HZ))
+ if (NCR5380_poll_politely(instance,
+ STATUS_REG, SR_REQ, SR_REQ, 2 * HZ) < 0)
abort = 1;
len = 1;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 74/78] ncr5380: Use runtime register mapping |
| Message-ID | <qMJoT-1cG-31@gated-at.bofh.it> |
| In reply to | #1300181 |
From: Ondrej Zary <linux@rainbow-software.org>
Convert compile-time C400_ register mapping to runtime mapping.
This removes the weird negative register offsets and allows adding
additional mappings.
While at it, convert read/write loops into insb/outsb.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
drivers/scsi/NCR5380.h | 13 ------
drivers/scsi/g_NCR5380.c | 88 +++++++++++++++++++++--------------------------
drivers/scsi/g_NCR5380.h | 12 ++++--
3 files changed, 49 insertions(+), 64 deletions(-)
Index: linux/drivers/scsi/NCR5380.h
===================================================================
--- linux.orig/drivers/scsi/NCR5380.h 2016-01-03 16:04:30.000000000 +1100
+++ linux/drivers/scsi/NCR5380.h 2016-01-03 16:04:51.000000000 +1100
@@ -163,8 +163,7 @@
/* Write any value to this register to start an ini mode DMA receive */
#define START_DMA_INITIATOR_RECEIVE_REG 7 /* wo */
-#define C400_CONTROL_STATUS_REG NCR53C400_register_offset-8 /* rw */
-
+/* NCR 53C400(A) Control Status Register bits: */
#define CSR_RESET 0x80 /* wo Resets 53c400 */
#define CSR_53C80_REG 0x80 /* ro 5380 registers busy */
#define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */
@@ -181,16 +180,6 @@
#define CSR_BASE CSR_53C80_INTR
#endif
-/* Number of 128-byte blocks to be transferred */
-#define C400_BLOCK_COUNTER_REG NCR53C400_register_offset-7 /* rw */
-
-/* Resume transfer after disconnect */
-#define C400_RESUME_TRANSFER_REG NCR53C400_register_offset-6 /* wo */
-
-/* Access to host buffer stack */
-#define C400_HOST_BUFFER NCR53C400_register_offset-4 /* rw */
-
-
/* Note : PHASE_* macros are based on the values of the STATUS register */
#define PHASE_MASK (SR_MSG | SR_CD | SR_IO)
Index: linux/drivers/scsi/g_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/g_NCR5380.c 2016-01-03 16:04:50.000000000 +1100
+++ linux/drivers/scsi/g_NCR5380.c 2016-01-03 16:04:51.000000000 +1100
@@ -253,6 +253,7 @@ static int __init generic_NCR5380_detect
};
int flags;
struct Scsi_Host *instance;
+ struct NCR5380_hostdata *hostdata;
#ifdef SCSI_G_NCR5380_MEM
unsigned long base;
void __iomem *iomem;
@@ -394,6 +395,7 @@ static int __init generic_NCR5380_detect
instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
if (instance == NULL)
goto out_release;
+ hostdata = shost_priv(instance);
#ifndef SCSI_G_NCR5380_MEM
instance->io_port = overrides[current_override].NCR5380_map_name;
@@ -403,18 +405,27 @@ static int __init generic_NCR5380_detect
* On NCR53C400 boards, NCR5380 registers are mapped 8 past
* the base address.
*/
- if (overrides[current_override].board == BOARD_NCR53C400)
+ if (overrides[current_override].board == BOARD_NCR53C400) {
instance->io_port += 8;
+ hostdata->c400_ctl_status = 0;
+ hostdata->c400_blk_cnt = 1;
+ hostdata->c400_host_buf = 4;
+ }
#else
instance->base = overrides[current_override].NCR5380_map_name;
- ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
+ hostdata->iomem = iomem;
+ if (overrides[current_override].board == BOARD_NCR53C400) {
+ hostdata->c400_ctl_status = 0x100;
+ hostdata->c400_blk_cnt = 0x101;
+ hostdata->c400_host_buf = 0x104;
+ }
#endif
if (NCR5380_init(instance, flags))
goto out_unregister;
if (overrides[current_override].board == BOARD_NCR53C400)
- NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
+ NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
NCR5380_maybe_reset_bus(instance);
@@ -522,31 +533,25 @@ generic_NCR5380_biosparam(struct scsi_de
static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
{
-#ifdef SCSI_G_NCR5380_MEM
struct NCR5380_hostdata *hostdata = shost_priv(instance);
-#endif
int blocks = len / 128;
int start = 0;
- int bl;
- NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
- NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
+ NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR);
+ NCR5380_write(hostdata->c400_blk_cnt, blocks);
while (1) {
- if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
+ if (NCR5380_read(hostdata->c400_blk_cnt) == 0)
break;
- }
- if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
+ if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
return -1;
}
- while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
+ while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
+ ; /* FIXME - no timeout */
#ifndef SCSI_G_NCR5380_MEM
- {
- int i;
- for (i = 0; i < 128; i++)
- dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
- }
+ insb(instance->io_port + hostdata->c400_host_buf,
+ dst + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_fromio(dst + start,
@@ -557,17 +562,12 @@ static inline int NCR5380_pread(struct S
}
if (blocks) {
- while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
- {
- // FIXME - no timeout
- }
+ while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
+ ; /* FIXME - no timeout */
#ifndef SCSI_G_NCR5380_MEM
- {
- int i;
- for (i = 0; i < 128; i++)
- dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
- }
+ insb(instance->io_port + hostdata->c400_host_buf,
+ dst + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_fromio(dst + start,
@@ -577,7 +577,7 @@ static inline int NCR5380_pread(struct S
blocks--;
}
- if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
+ if (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ))
printk("53C400r: no 53C80 gated irq after transfer");
#if 0
@@ -585,7 +585,7 @@ static inline int NCR5380_pread(struct S
* DON'T DO THIS - THEY NEVER ARRIVE!
*/
printk("53C400r: Waiting for 53C80 registers\n");
- while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
+ while (NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)
;
#endif
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
@@ -606,32 +606,26 @@ static inline int NCR5380_pread(struct S
static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
{
-#ifdef SCSI_G_NCR5380_MEM
struct NCR5380_hostdata *hostdata = shost_priv(instance);
-#endif
int blocks = len / 128;
int start = 0;
- int bl;
int i;
- NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
- NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
+ NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
+ NCR5380_write(hostdata->c400_blk_cnt, blocks);
while (1) {
- if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
+ if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
return -1;
}
- if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
+ if (NCR5380_read(hostdata->c400_blk_cnt) == 0)
break;
- }
- while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
+ while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; // FIXME - timeout
#ifndef SCSI_G_NCR5380_MEM
- {
- for (i = 0; i < 128; i++)
- NCR5380_write(C400_HOST_BUFFER, src[start + i]);
- }
+ outsb(instance->io_port + hostdata->c400_host_buf,
+ src + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
@@ -641,14 +635,12 @@ static inline int NCR5380_pwrite(struct
blocks--;
}
if (blocks) {
- while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
+ while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; // FIXME - no timeout
#ifndef SCSI_G_NCR5380_MEM
- {
- for (i = 0; i < 128; i++)
- NCR5380_write(C400_HOST_BUFFER, src[start + i]);
- }
+ outsb(instance->io_port + hostdata->c400_host_buf,
+ src + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
@@ -660,7 +652,7 @@ static inline int NCR5380_pwrite(struct
#if 0
printk("53C400w: waiting for registers to be available\n");
- THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
+ THEY NEVER DO ! while (NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG);
printk("53C400w: Got em\n");
#endif
@@ -668,7 +660,7 @@ static inline int NCR5380_pwrite(struct
/* All documentation says to check for this. Maybe my hardware is too
* fast. Waiting for it seems to work fine! KLL
*/
- while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
+ while (!(i = NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ))
; // FIXME - no timeout
/*
Index: linux/drivers/scsi/g_NCR5380.h
===================================================================
--- linux.orig/drivers/scsi/g_NCR5380.h 2016-01-03 16:04:03.000000000 +1100
+++ linux/drivers/scsi/g_NCR5380.h 2016-01-03 16:04:51.000000000 +1100
@@ -29,7 +29,6 @@
#define NCR5380_map_type int
#define NCR5380_map_name port
-#define NCR53C400_register_offset 0
#ifdef CONFIG_SCSI_GENERIC_NCR53C400
#define NCR5380_region_size 16
@@ -42,7 +41,10 @@
#define NCR5380_write(reg, value) \
outb(value, instance->io_port + (reg))
-#define NCR5380_implementation_fields /* none */
+#define NCR5380_implementation_fields \
+ int c400_ctl_status; \
+ int c400_blk_cnt; \
+ int c400_host_buf;
#else
/* therefore SCSI_G_NCR5380_MEM */
@@ -50,7 +52,6 @@
#define NCR5380_map_type unsigned long
#define NCR5380_map_name base
-#define NCR53C400_register_offset 0x108
#define NCR53C400_mem_base 0x3880
#define NCR53C400_host_buffer 0x3900
#define NCR5380_region_size 0x3a00
@@ -63,7 +64,10 @@
NCR53C400_mem_base + (reg))
#define NCR5380_implementation_fields \
- void __iomem *iomem;
+ void __iomem *iomem; \
+ int c400_ctl_status; \
+ int c400_blk_cnt; \
+ int c400_host_buf;
#endif
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 76/78] ncr5380: Enable PDMA for DTC chips |
| Message-ID | <qMJoU-1cG-47@gated-at.bofh.it> |
| In reply to | #1300181 |
From: Ondrej Zary <linux@rainbow-software.org>
Add I/O register mapping for DTC chips and enable PDMA mode.
These chips have 16-bit wide HOST BUFFER register and it must be read
by 16-bit accesses (we lose data otherwise).
Large PIO transfers crash at least the DTCT-436P chip (all reads result
in 0xFF) so this patch actually makes it work.
The chip also crashes when we bang on the C400 host status register too
heavily after PDMA write - a small udelay is needed.
Tested on DTCT-436P and verified that it does not break 53C400A.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
Changes to Ondrej's version:
- Rebased.
---
drivers/scsi/g_NCR5380.c | 38 +++++++++++++++++++++++++++++++-------
drivers/scsi/g_NCR5380.h | 3 ++-
2 files changed, 33 insertions(+), 8 deletions(-)
Index: linux/drivers/scsi/g_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/g_NCR5380.c 2016-01-03 16:04:53.000000000 +1100
+++ linux/drivers/scsi/g_NCR5380.c 2016-01-03 16:04:54.000000000 +1100
@@ -327,7 +327,7 @@ static int __init generic_NCR5380_detect
ports = ncr_53c400a_ports;
break;
case BOARD_DTC3181E:
- flags = FLAG_NO_PSEUDO_DMA;
+ flags = FLAG_NO_DMA_FIXUP;
ports = dtc_3181e_ports;
break;
}
@@ -400,6 +400,7 @@ static int __init generic_NCR5380_detect
#ifndef SCSI_G_NCR5380_MEM
instance->io_port = overrides[current_override].NCR5380_map_name;
instance->n_io_port = region_size;
+ hostdata->io_width = 1; /* 8-bit PDMA by default */
/*
* On NCR53C400 boards, NCR5380 registers are mapped 8 past
@@ -412,6 +413,9 @@ static int __init generic_NCR5380_detect
hostdata->c400_blk_cnt = 1;
hostdata->c400_host_buf = 4;
break;
+ case BOARD_DTC3181E:
+ hostdata->io_width = 2; /* 16-bit PDMA */
+ /* fall through */
case BOARD_NCR53C400A:
hostdata->c400_ctl_status = 9;
hostdata->c400_blk_cnt = 10;
@@ -427,6 +431,7 @@ static int __init generic_NCR5380_detect
hostdata->c400_blk_cnt = 0x101;
hostdata->c400_host_buf = 0x104;
break;
+ case BOARD_DTC3181E:
case BOARD_NCR53C400A:
pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
goto out_unregister;
@@ -438,6 +443,7 @@ static int __init generic_NCR5380_detect
switch (overrides[current_override].board) {
case BOARD_NCR53C400:
+ case BOARD_DTC3181E:
case BOARD_NCR53C400A:
NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
}
@@ -565,7 +571,11 @@ static inline int NCR5380_pread(struct S
; /* FIXME - no timeout */
#ifndef SCSI_G_NCR5380_MEM
- insb(instance->io_port + hostdata->c400_host_buf,
+ if (hostdata->io_width == 2)
+ insw(instance->io_port + hostdata->c400_host_buf,
+ dst + start, 64);
+ else
+ insb(instance->io_port + hostdata->c400_host_buf,
dst + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
@@ -581,7 +591,11 @@ static inline int NCR5380_pread(struct S
; /* FIXME - no timeout */
#ifndef SCSI_G_NCR5380_MEM
- insb(instance->io_port + hostdata->c400_host_buf,
+ if (hostdata->io_width == 2)
+ insw(instance->io_port + hostdata->c400_host_buf,
+ dst + start, 64);
+ else
+ insb(instance->io_port + hostdata->c400_host_buf,
dst + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
@@ -639,7 +653,11 @@ static inline int NCR5380_pwrite(struct
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; // FIXME - timeout
#ifndef SCSI_G_NCR5380_MEM
- outsb(instance->io_port + hostdata->c400_host_buf,
+ if (hostdata->io_width == 2)
+ outsw(instance->io_port + hostdata->c400_host_buf,
+ src + start, 64);
+ else
+ outsb(instance->io_port + hostdata->c400_host_buf,
src + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
@@ -654,7 +672,11 @@ static inline int NCR5380_pwrite(struct
; // FIXME - no timeout
#ifndef SCSI_G_NCR5380_MEM
- outsb(instance->io_port + hostdata->c400_host_buf,
+ if (hostdata->io_width == 2)
+ outsw(instance->io_port + hostdata->c400_host_buf,
+ src + start, 64);
+ else
+ outsb(instance->io_port + hostdata->c400_host_buf,
src + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
@@ -675,8 +697,10 @@ static inline int NCR5380_pwrite(struct
/* All documentation says to check for this. Maybe my hardware is too
* fast. Waiting for it seems to work fine! KLL
*/
- while (!(i = NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ))
- ; // FIXME - no timeout
+ while (!(i = NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ)) {
+ udelay(4); /* DTC436 chip hangs without this */
+ /* FIXME - no timeout */
+ }
/*
* I know. i is certainly != 0 here but the loop is new. See previous
Index: linux/drivers/scsi/g_NCR5380.h
===================================================================
--- linux.orig/drivers/scsi/g_NCR5380.h 2016-01-03 16:04:51.000000000 +1100
+++ linux/drivers/scsi/g_NCR5380.h 2016-01-03 16:04:54.000000000 +1100
@@ -44,7 +44,8 @@
#define NCR5380_implementation_fields \
int c400_ctl_status; \
int c400_blk_cnt; \
- int c400_host_buf;
+ int c400_host_buf; \
+ int io_width;
#else
/* therefore SCSI_G_NCR5380_MEM */
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 67/78] ncr5380: Cleanup comments |
| Message-ID | <qMJoU-1cG-43@gated-at.bofh.it> |
| In reply to | #1300181 |
The CVS revision log is not nearly as useful as the history/history.git
repo, so remove it. Roman's commentary at the top of his driver repeats
the same information elsewhere in the file so remove it. Also remove
some other redundant or obsolete comments.
Both the driver and the datasheets confusingly refer to a DMA access
for a SCSI WRITE command as a "DMA write". Similarly a SCSI READ command
is called a "DMA read". This is the opposite of the usual convention.
Thankfully, the chip documentation and driver code also use "DMA send" and
"DMA receive", so adopt this terminology.
This removes some unimportant discrepancies between the two core driver
forks so that 'diff' can be used to reveal the important ones, to
facilitate reunification.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
Changes since v3:
- Removed another pointless comment. Duplicating the text of the SCSI
standard isn't useful.
---
drivers/scsi/NCR5380.c | 170 ++++++++++---------------------------------
drivers/scsi/atari_NCR5380.c | 107 +++------------------------
2 files changed, 53 insertions(+), 224 deletions(-)
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2016-01-03 16:04:38.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2016-01-03 16:04:40.000000000 +1100
@@ -25,45 +25,8 @@
*/
/*
- * Revision 1.10 1998/9/2 Alan Cox
- * (alan@lxorguk.ukuu.org.uk)
- * Fixed up the timer lockups reported so far. Things still suck. Looking
- * forward to 2.3 and per device request queues. Then it'll be possible to
- * SMP thread this beast and improve life no end.
-
- * Revision 1.9 1997/7/27 Ronald van Cuijlenborg
- * (ronald.van.cuijlenborg@tip.nl or nutty@dds.nl)
- * (hopefully) fixed and enhanced USLEEP
- * added support for DTC3181E card (for Mustek scanner)
- *
-
- * Revision 1.8 Ingmar Baumgart
- * (ingmar@gonzo.schwaben.de)
- * added support for NCR53C400a card
- *
-
- * Revision 1.7 1996/3/2 Ray Van Tassle (rayvt@comm.mot.com)
- * added proc_info
- * added support needed for DTC 3180/3280
- * fixed a couple of bugs
- *
-
- * Revision 1.5 1994/01/19 09:14:57 drew
- * Fixed udelay() hack that was being used on DATAOUT phases
- * instead of a proper wait for the final handshake.
- *
- * Revision 1.4 1994/01/19 06:44:25 drew
- * *** empty log message ***
- *
- * Revision 1.3 1994/01/19 05:24:40 drew
- * Added support for TCR LAST_BYTE_SENT bit.
- *
- * Revision 1.2 1994/01/15 06:14:11 drew
- * REAL DMA support, bug fixes.
- *
- * Revision 1.1 1994/01/15 06:00:54 drew
- * Initial revision
- *
+ * With contributions from Ray Van Tassle, Ingmar Baumgart,
+ * Ronald van Cuijlenborg, Alan Cox and others.
*/
/*
@@ -98,12 +61,6 @@
* transfer - some PC's will use the I/O bus, 68K's must use
* memory mapped) and drops this file in their 'C' wrapper.
*
- * (Note from hch: unfortunately it was not enough for the different
- * m68k folks and instead of improving this driver they copied it
- * and hacked it up for their needs. As a consequence they lost
- * most updates to this driver. Maybe someone will fix all these
- * drivers to use a common core one day..)
- *
* As far as command queueing, two queues are maintained for
* each 5380 in the system - commands that haven't been issued yet,
* and commands that are currently executing. This means that an
@@ -180,9 +137,6 @@
* rely on phase mismatch and EOP interrupts to determine end
* of phase.
*
- * Defaults for these will be provided although the user may want to adjust
- * these to allocate CPU resources to the SCSI driver or "real" code.
- *
* These macros MUST be defined :
*
* NCR5380_read(register) - read from the specified register
@@ -219,7 +173,7 @@
static int do_abort(struct Scsi_Host *);
static void do_reset(struct Scsi_Host *);
-/*
+/**
* initialize_SCp - init the scsi pointer field
* @cmd: command block to set up
*
@@ -368,8 +322,6 @@ mrs[] = {
* @instance: adapter state to dump
*
* Print the SCSI bus signals for debugging purposes
- *
- * Locks: caller holds hostdata lock (not essential)
*/
static void NCR5380_print(struct Scsi_Host *instance)
@@ -402,13 +354,11 @@ static void NCR5380_print(struct Scsi_Ho
}
-/*
+/**
* NCR5380_print_phase - show SCSI phase
* @instance: adapter to dump
*
* Print the current SCSI phase for debugging purposes
- *
- * Locks: none
*/
static void NCR5380_print_phase(struct Scsi_Host *instance)
@@ -452,8 +402,6 @@ static irqreturn_t __init probe_intr(int
*
* Autoprobe for the IRQ line used by the NCR5380 by triggering an IRQ
* and then looking to see what interrupt actually turned up.
- *
- * Locks: none, irqs must be enabled on entry
*/
static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
@@ -503,8 +451,6 @@ static int __init __maybe_unused NCR5380
* @instance: relevant scsi host instance
*
* For use as the host template info() handler.
- *
- * Locks: none
*/
static const char *NCR5380_info(struct Scsi_Host *instance)
@@ -554,20 +500,6 @@ static void prepare_info(struct Scsi_Hos
}
#ifdef PSEUDO_DMA
-/******************************************/
-/*
- * /proc/scsi/[dtc pas16 t128 generic]/[0-ASC_NUM_BOARD_SUPPORTED]
- *
- * *buffer: I/O buffer
- * **start: if inout == FALSE pointer into buffer where user read should start
- * offset: current offset
- * length: length of buffer
- * hostno: Scsi_Host host_no
- * inout: TRUE - user is writing; FALSE - user is reading
- *
- * Return the number of bytes read from or written
- */
-
static int __maybe_unused NCR5380_write_info(struct Scsi_Host *instance,
char *buffer, int length)
{
@@ -601,8 +533,6 @@ static int __maybe_unused NCR5380_show_i
* set correctly. I don't care about the irq and other fields.
*
* Returns 0 for success
- *
- * Locks: interrupts must be enabled when we are called
*/
static int NCR5380_init(struct Scsi_Host *instance, int flags)
@@ -877,9 +807,6 @@ static void requeue_cmd(struct Scsi_Host
* be done on the NCR5380 host adapters in a system. Both
* NCR5380_queue_command() and NCR5380_intr() will try to start it
* in case it is not running.
- *
- * Locks: called as its own thread with no locks held. Takes the
- * host lock and called routines may take the isa dma lock.
*/
static void NCR5380_main(struct work_struct *work)
@@ -1077,8 +1004,6 @@ static irqreturn_t NCR5380_intr(int irq,
*
* If failed (no target) : cmd->scsi_done() will be called, and the
* cmd->result host byte set to DID_BAD_TARGET.
- *
- * Locks: caller holds hostdata lock in IRQ mode
*/
static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
@@ -1567,8 +1492,6 @@ timeout:
* is in same phase.
*
* Also, *phase, *count, *data are modified in place.
- *
- * Locks: io_request lock held by caller
*/
@@ -1645,39 +1568,38 @@ static int NCR5380_transfer_dma(struct S
} while ((tmp & BASR_PHASE_MATCH) && !(tmp & (BASR_BUSY_ERROR | BASR_END_DMA_TRANSFER)));
/*
- At this point, either we've completed DMA, or we have a phase mismatch,
- or we've unexpectedly lost BUSY (which is a real error).
-
- For write DMAs, we want to wait until the last byte has been
- transferred out over the bus before we turn off DMA mode. Alas, there
- seems to be no terribly good way of doing this on a 5380 under all
- conditions. For non-scatter-gather operations, we can wait until REQ
- and ACK both go false, or until a phase mismatch occurs. Gather-writes
- are nastier, since the device will be expecting more data than we
- are prepared to send it, and REQ will remain asserted. On a 53C8[01] we
- could test LAST BIT SENT to assure transfer (I imagine this is precisely
- why this signal was added to the newer chips) but on the older 538[01]
- this signal does not exist. The workaround for this lack is a watchdog;
- we bail out of the wait-loop after a modest amount of wait-time if
- the usual exit conditions are not met. Not a terribly clean or
- correct solution :-%
-
- Reads are equally tricky due to a nasty characteristic of the NCR5380.
- If the chip is in DMA mode for an READ, it will respond to a target's
- REQ by latching the SCSI data into the INPUT DATA register and asserting
- ACK, even if it has _already_ been notified by the DMA controller that
- the current DMA transfer has completed! If the NCR5380 is then taken
- out of DMA mode, this already-acknowledged byte is lost.
-
- This is not a problem for "one DMA transfer per command" reads, because
- the situation will never arise... either all of the data is DMA'ed
- properly, or the target switches to MESSAGE IN phase to signal a
- disconnection (either operation bringing the DMA to a clean halt).
- However, in order to handle scatter-reads, we must work around the
- problem. The chosen fix is to DMA N-2 bytes, then check for the
- condition before taking the NCR5380 out of DMA mode. One or two extra
- bytes are transferred via PIO as necessary to fill out the original
- request.
+ * At this point, either we've completed DMA, or we have a phase mismatch,
+ * or we've unexpectedly lost BUSY (which is a real error).
+ *
+ * For DMA sends, we want to wait until the last byte has been
+ * transferred out over the bus before we turn off DMA mode. Alas, there
+ * seems to be no terribly good way of doing this on a 5380 under all
+ * conditions. For non-scatter-gather operations, we can wait until REQ
+ * and ACK both go false, or until a phase mismatch occurs. Gather-sends
+ * are nastier, since the device will be expecting more data than we
+ * are prepared to send it, and REQ will remain asserted. On a 53C8[01] we
+ * could test Last Byte Sent to assure transfer (I imagine this is precisely
+ * why this signal was added to the newer chips) but on the older 538[01]
+ * this signal does not exist. The workaround for this lack is a watchdog;
+ * we bail out of the wait-loop after a modest amount of wait-time if
+ * the usual exit conditions are not met. Not a terribly clean or
+ * correct solution :-%
+ *
+ * DMA receive is equally tricky due to a nasty characteristic of the NCR5380.
+ * If the chip is in DMA receive mode, it will respond to a target's
+ * REQ by latching the SCSI data into the INPUT DATA register and asserting
+ * ACK, even if it has _already_ been notified by the DMA controller that
+ * the current DMA transfer has completed! If the NCR5380 is then taken
+ * out of DMA mode, this already-acknowledged byte is lost. This is
+ * not a problem for "one DMA transfer per READ command", because
+ * the situation will never arise... either all of the data is DMA'ed
+ * properly, or the target switches to MESSAGE IN phase to signal a
+ * disconnection (either operation bringing the DMA to a clean halt).
+ * However, in order to handle scatter-receive, we must work around the
+ * problem. The chosen fix is to DMA N-2 bytes, then check for the
+ * condition before taking the NCR5380 out of DMA mode. One or two extra
+ * bytes are transferred via PIO as necessary to fill out the original
+ * request.
*/
if (p & SR_IO) {
@@ -1813,8 +1735,6 @@ static int NCR5380_transfer_dma(struct S
*
* XXX Note : we need to watch for bus free or a reset condition here
* to recover from an unexpected bus free condition.
- *
- * Locks: io_request_lock held by caller in IRQ mode
*/
static void NCR5380_information_transfer(struct Scsi_Host *instance) {
@@ -2009,18 +1929,10 @@ static void NCR5380_information_transfer
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
break;
case EXTENDED_MESSAGE:
-/*
- * Extended messages are sent in the following format :
- * Byte
- * 0 EXTENDED_MESSAGE == 1
- * 1 length (includes one byte for code, doesn't
- * include first two bytes)
- * 2 code
- * 3..length+1 arguments
- *
- * Start the extended message buffer with the EXTENDED_MESSAGE
- * byte, since spi_print_msg() wants the whole thing.
- */
+ /*
+ * Start the message buffer with the EXTENDED_MESSAGE
+ * byte, since spi_print_msg() wants the whole thing.
+ */
extended_msg[0] = EXTENDED_MESSAGE;
/* Accept first byte by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
@@ -2142,8 +2054,6 @@ static void NCR5380_information_transfer
* nexus has been reestablished,
*
* Inputs : instance - this instance of the NCR5380.
- *
- * Locks: io_request_lock held by caller if IRQ driven
*/
static void NCR5380_reselect(struct Scsi_Host *instance) {
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:38.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:40.000000000 +1100
@@ -24,47 +24,7 @@
* 1+ (800) 334-5454
*/
-/*
- * ++roman: To port the 5380 driver to the Atari, I had to do some changes in
- * this file, too:
- *
- * - Some of the debug statements were incorrect (undefined variables and the
- * like). I fixed that.
- *
- * - In information_transfer(), I think a #ifdef was wrong. Looking at the
- * possible DMA transfer size should also happen for REAL_DMA. I added this
- * in the #if statement.
- *
- * - When using real DMA, information_transfer() should return in a DATAOUT
- * phase after starting the DMA. It has nothing more to do.
- *
- * - The interrupt service routine should run main after end of DMA, too (not
- * only after RESELECTION interrupts). Additionally, it should _not_ test
- * for more interrupts after running main, since a DMA process may have
- * been started and interrupts are turned on now. The new int could happen
- * inside the execution of NCR5380_intr(), leading to recursive
- * calls.
- *
- * - I've added a function merge_contiguous_buffers() that tries to
- * merge scatter-gather buffers that are located at contiguous
- * physical addresses and can be processed with the same DMA setup.
- * Since most scatter-gather operations work on a page (4K) of
- * 4 buffers (1K), in more than 90% of all cases three interrupts and
- * DMA setup actions are saved.
- *
- * - I've deleted all the stuff for AUTOPROBE_IRQ, REAL_DMA_POLL, PSEUDO_DMA
- * and USLEEP, because these were messing up readability and will never be
- * needed for Atari SCSI.
- *
- * - I've revised the NCR5380_main() calling scheme (relax the 'main_running'
- * stuff), and 'main' is executed in a bottom half if awoken by an
- * interrupt.
- *
- * - The code was quite cluttered up by "#if (NDEBUG & NDEBUG_*) printk..."
- * constructs. In my eyes, this made the source rather unreadable, so I
- * finally replaced that by the *_PRINTK() macros.
- *
- */
+/* Ported to Atari by Roman Hodek and others. */
/* Adapted for the sun3 by Sam Creasey. */
@@ -344,17 +304,15 @@ static void free_all_tags(struct NCR5380
#endif /* SUPPORT_TAGS */
-
-/*
- * Function: void merge_contiguous_buffers( struct scsi_cmnd *cmd )
+/**
+ * merge_contiguous_buffers - coalesce scatter-gather list entries
+ * @cmd: command requesting IO
*
- * Purpose: Try to merge several scatter-gather requests into one DMA
- * transfer. This is possible if the scatter buffers lie on
- * physical contiguous addresses.
- *
- * Parameters: struct scsi_cmnd *cmd
- * The command to work on. The first scatter buffer's data are
- * assumed to be already transferred into ptr/this_residual.
+ * Try to merge several scatter-gather buffers into one DMA transfer.
+ * This is possible if the scatter buffers lie on physically
+ * contiguous addresses. The first scatter-gather buffer's data are
+ * assumed to be already transferred into cmd->SCp.this_residual.
+ * Every buffer merged avoids an interrupt and a DMA setup operation.
*/
static void merge_contiguous_buffers(struct scsi_cmnd *cmd)
@@ -406,9 +364,7 @@ static inline void initialize_SCp(struct
cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1;
cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
cmd->SCp.this_residual = cmd->SCp.buffer->length;
- /* ++roman: Try to merge some scatter-buffers if they are at
- * contiguous physical addresses.
- */
+
merge_contiguous_buffers(cmd);
} else {
cmd->SCp.buffer = NULL;
@@ -556,8 +512,6 @@ static struct {
* @instance: adapter to dump
*
* Print the current SCSI phase for debugging purposes
- *
- * Locks: none
*/
static void NCR5380_print_phase(struct Scsi_Host *instance)
@@ -583,8 +537,6 @@ static void NCR5380_print_phase(struct S
* @instance: relevant scsi host instance
*
* For use as the host template info() handler.
- *
- * Locks: none
*/
static const char *NCR5380_info(struct Scsi_Host *instance)
@@ -829,20 +781,6 @@ static int NCR5380_queue_command(struct
cmd->result = 0;
/*
- * Insert the cmd into the issue queue. Note that REQUEST SENSE
- * commands are added to the head of the queue since any command will
- * clear the contingent allegiance condition that exists and the
- * sense data is only guaranteed to be valid while the condition exists.
- */
-
- /* ++guenther: now that the issue queue is being set up, we can lock ST-DMA.
- * Otherwise a running NCR5380_main may steal the lock.
- * Lock before actually inserting due to fairness reasons explained in
- * atari_scsi.c. If we insert first, then it's impossible for this driver
- * to release the lock.
- * Stop timer for this command while waiting for the lock, or timeouts
- * may happen (and they really do), and it's no good if the command doesn't
- * appear in any of the queues.
* ++roman: Just disabling the NCR interrupt isn't sufficient here,
* because also a timer int can trigger an abort or reset, which would
* alter queues and touch the lock.
@@ -958,8 +896,6 @@ static void requeue_cmd(struct Scsi_Host
* be done on the NCR5380 host adapters in a system. Both
* NCR5380_queue_command() and NCR5380_intr() will try to start it
* in case it is not running.
- *
- * Locks: called as its own thread with no locks held.
*/
static void NCR5380_main(struct work_struct *work)
@@ -1041,7 +977,6 @@ static void NCR5380_main(struct work_str
* mismatch occurs (which would finish the DMA transfer).
*
* Inputs : instance - this instance of the NCR5380.
- *
*/
static void NCR5380_dma_complete(struct Scsi_Host *instance)
@@ -1766,7 +1701,6 @@ timeout:
* is in same phase.
*
* Also, *phase, *count, *data are modified in place.
- *
*/
@@ -1968,9 +1902,6 @@ static void NCR5380_information_transfer
--cmd->SCp.buffers_residual;
cmd->SCp.this_residual = cmd->SCp.buffer->length;
cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
- /* ++roman: Try to merge some scatter-buffers if
- * they are at contiguous physical addresses.
- */
merge_contiguous_buffers(cmd);
dsprintk(NDEBUG_INFORMATION, instance, "%d bytes and %d buffers left\n",
cmd->SCp.this_residual,
@@ -2007,7 +1938,8 @@ static void NCR5380_information_transfer
/*
* If the watchdog timer fires, all future
* accesses to this device will use the
- * polled-IO. */
+ * polled-IO.
+ */
scmd_printk(KERN_INFO, cmd,
"switching to slow handshake\n");
cmd->device->borken = 1;
@@ -2099,10 +2031,6 @@ static void NCR5380_information_transfer
/* Enable reselect interrupts */
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
- /* ++roman: For Falcon SCSI, release the lock on the
- * ST-DMA here if no other commands are waiting on the
- * disconnected queue.
- */
maybe_release_dma_irq(instance);
return;
case MESSAGE_REJECT:
@@ -2164,15 +2092,7 @@ static void NCR5380_information_transfer
break;
case EXTENDED_MESSAGE:
/*
- * Extended messages are sent in the following format :
- * Byte
- * 0 EXTENDED_MESSAGE == 1
- * 1 length (includes one byte for code, doesn't
- * include first two bytes)
- * 2 code
- * 3..length+1 arguments
- *
- * Start the extended message buffer with the EXTENDED_MESSAGE
+ * Start the message buffer with the EXTENDED_MESSAGE
* byte, since spi_print_msg() wants the whole thing.
*/
extended_msg[0] = EXTENDED_MESSAGE;
@@ -2299,7 +2219,6 @@ static void NCR5380_information_transfer
* nexus has been reestablished,
*
* Inputs : instance - this instance of the NCR5380.
- *
*/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 39/78] ncr5380: Standardize interrupt handling |
| Message-ID | <qMJoU-1cG-49@gated-at.bofh.it> |
| In reply to | #1300181 |
Because interrupt handling is crucial to the core driver(s), all wrapper
drivers need to agree on this code. This patch removes discrepancies.
NCR5380_intr() in NCR5380.c has the following pointless loop that differs
from the code in atari_NCR5380.c.
done = 1;
do {
/* ... */
} while (!done);
The 'done' flag gets cleared when a reconnected command is to be processed
from the work queue. But in NCR5380.c, the flag is also used to cause the
interrupt conditions to be re-examined. Perhaps this was because
NCR5380_reselect() was expected to cause another interrupt, or perhaps
the remaining present interrupt conditions need to be handled after the
NCR5380_reselect() call?
Actually, both possibilities are bogus, as is the loop itself. It seems
have been overlooked in the hit-and-miss removal of scsi host instance
list iteration many years ago; see history/history.git commit 491447e1fcff
("[PATCH] next NCR5380 updates") and commit 69e1a9482e57 ("[PATCH] fix up
NCR5380 private data"). See also my earlier patch, "Always retry
arbitration and selection".
The datasheet says, "IRQ can be reset simply by reading the Reset
Parity/Interrupt Register". So don't treat the chip IRQ like a
level-triggered interrupt. Of the conditions that set the IRQ flag,
some are level-triggered and some are edge-triggered, which means IRQ
itself must be edge-triggered.
Some interrupt conditions are latched and some are not. Before clearing
the chip IRQ flag, clear all state that may cause it to be raised. That
means clearing the DMA Mode and Busy Monitor bits in the Mode Register
and clearing the host ID in the Select Enable register.
Also clean up some printk's and some comments. Keep atari_NCR5380.c and
NCR5380.c in agreement.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
drivers/scsi/NCR5380.c | 187 +++++++++++++++++++++++--------------------
drivers/scsi/atari_NCR5380.c | 156 +++++++++++++++++------------------
drivers/scsi/dtc.c | 8 -
drivers/scsi/g_NCR5380.c | 2
4 files changed, 180 insertions(+), 173 deletions(-)
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2016-01-03 16:03:49.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2016-01-03 16:03:50.000000000 +1100
@@ -951,85 +951,114 @@ static void NCR5380_main(struct work_str
#ifndef DONT_USE_INTR
/**
- * NCR5380_intr - generic NCR5380 irq handler
- * @irq: interrupt number
- * @dev_id: device info
- *
- * Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses
- * from the disconnected queue, and restarting NCR5380_main()
- * as required.
- *
- * Locks: takes the needed instance locks
+ * NCR5380_intr - generic NCR5380 irq handler
+ * @irq: interrupt number
+ * @dev_id: device info
+ *
+ * Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses
+ * from the disconnected queue, and restarting NCR5380_main()
+ * as required.
+ *
+ * The chip can assert IRQ in any of six different conditions. The IRQ flag
+ * is then cleared by reading the Reset Parity/Interrupt Register (RPIR).
+ * Three of these six conditions are latched in the Bus and Status Register:
+ * - End of DMA (cleared by ending DMA Mode)
+ * - Parity error (cleared by reading RPIR)
+ * - Loss of BSY (cleared by reading RPIR)
+ * Two conditions have flag bits that are not latched:
+ * - Bus phase mismatch (non-maskable in DMA Mode, cleared by ending DMA Mode)
+ * - Bus reset (non-maskable)
+ * The remaining condition has no flag bit at all:
+ * - Selection/reselection
+ *
+ * Hence, establishing the cause(s) of any interrupt is partly guesswork.
+ * In "The DP8490 and DP5380 Comparison Guide", National Semiconductor
+ * claimed that "the design of the [DP8490] interrupt logic ensures
+ * interrupts will not be lost (they can be on the DP5380)."
+ * The L5380/53C80 datasheet from LOGIC Devices has more details.
+ *
+ * Checking for bus reset by reading RST is futile because of interrupt
+ * latency, but a bus reset will reset chip logic. Checking for parity error
+ * is unnecessary because that interrupt is never enabled. A Loss of BSY
+ * condition will clear DMA Mode. We can tell when this occurs because the
+ * the Busy Monitor interrupt is enabled together with DMA Mode.
*/
-static irqreturn_t NCR5380_intr(int dummy, void *dev_id)
+static irqreturn_t NCR5380_intr(int irq, void *dev_id)
{
struct Scsi_Host *instance = dev_id;
- struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
- int done;
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+ int handled = 0;
unsigned char basr;
unsigned long flags;
- dprintk(NDEBUG_INTR, "scsi : NCR5380 irq %d triggered\n",
- instance->irq);
+ spin_lock_irqsave(instance->host_lock, flags);
+
+ basr = NCR5380_read(BUS_AND_STATUS_REG);
+ if (basr & BASR_IRQ) {
+ unsigned char mr = NCR5380_read(MODE_REG);
+ unsigned char sr = NCR5380_read(STATUS_REG);
+
+ dprintk(NDEBUG_INTR, "scsi%d: IRQ %d, BASR 0x%02x, SR 0x%02x, MR 0x%02x\n",
+ instance->host_no, irq, basr, sr, mr);
- do {
- done = 1;
- spin_lock_irqsave(instance->host_lock, flags);
- /* Look for pending interrupts */
- basr = NCR5380_read(BUS_AND_STATUS_REG);
- /* XXX dispatch to appropriate routine if found and done=0 */
- if (basr & BASR_IRQ) {
- NCR5380_dprint(NDEBUG_INTR, instance);
- if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
- done = 0;
- dprintk(NDEBUG_INTR, "scsi%d : SEL interrupt\n", instance->host_no);
- NCR5380_reselect(instance);
- (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- } else if (basr & BASR_PARITY_ERROR) {
- dprintk(NDEBUG_INTR, "scsi%d : PARITY interrupt\n", instance->host_no);
- (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- } else if ((NCR5380_read(STATUS_REG) & SR_RST) == SR_RST) {
- dprintk(NDEBUG_INTR, "scsi%d : RESET interrupt\n", instance->host_no);
- (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- } else {
#if defined(REAL_DMA)
- /*
- * We should only get PHASE MISMATCH and EOP interrupts
- * if we have DMA enabled, so do a sanity check based on
- * the current setting of the MODE register.
- */
+ if ((mr & MR_DMA_MODE) || (mr & MR_MONITOR_BSY)) {
+ /* Probably End of DMA, Phase Mismatch or Loss of BSY.
+ * We ack IRQ after clearing Mode Register. Workarounds
+ * for End of DMA errata need to happen in DMA Mode.
+ */
- if ((NCR5380_read(MODE_REG) & MR_DMA) && ((basr & BASR_END_DMA_TRANSFER) || !(basr & BASR_PHASE_MATCH))) {
- int transferred;
+ dprintk(NDEBUG_INTR, "scsi%d: interrupt in DMA mode\n", intance->host_no);
- if (!hostdata->connected)
- panic("scsi%d : received end of DMA interrupt with no connected cmd\n", instance->hostno);
+ int transferred;
- transferred = (hostdata->dmalen - NCR5380_dma_residual(instance));
- hostdata->connected->SCp.this_residual -= transferred;
- hostdata->connected->SCp.ptr += transferred;
- hostdata->dmalen = 0;
-
- (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
-
- /* FIXME: we need to poll briefly then defer a workqueue task ! */
- NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, BASR_ACK, 0, 2*HZ);
+ if (!hostdata->connected)
+ panic("scsi%d : DMA interrupt with no connected cmd\n",
+ instance->hostno);
- NCR5380_write(MODE_REG, MR_BASE);
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- }
-#else
- dprintk(NDEBUG_INTR, "scsi : unknown interrupt, BASR 0x%X, MR 0x%X, SR 0x%x\n", basr, NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG));
- (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
-#endif
+ transferred = hostdata->dmalen - NCR5380_dma_residual(instance);
+ hostdata->connected->SCp.this_residual -= transferred;
+ hostdata->connected->SCp.ptr += transferred;
+ hostdata->dmalen = 0;
+
+ /* FIXME: we need to poll briefly then defer a workqueue task ! */
+ NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, BASR_ACK, 0, 2 * HZ);
+
+ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+ NCR5380_write(MODE_REG, MR_BASE);
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+ } else
+#endif /* REAL_DMA */
+ if ((NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_mask) &&
+ (sr & (SR_SEL | SR_IO | SR_BSY | SR_RST)) == (SR_SEL | SR_IO)) {
+ /* Probably reselected */
+ NCR5380_write(SELECT_ENABLE_REG, 0);
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+
+ dprintk(NDEBUG_INTR, "scsi%d: interrupt with SEL and IO\n",
+ instance->host_no);
+
+ if (!hostdata->connected) {
+ NCR5380_reselect(instance);
+ queue_work(hostdata->work_q, &hostdata->main_task);
}
- } /* if BASR_IRQ */
- spin_unlock_irqrestore(instance->host_lock, flags);
- if(!done)
- queue_work(hostdata->work_q, &hostdata->main_task);
- } while (!done);
- return IRQ_HANDLED;
+ if (!hostdata->connected)
+ NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
+ } else {
+ /* Probably Bus Reset */
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+
+ dprintk(NDEBUG_INTR, "scsi%d: unknown interrupt\n", instance->host_no);
+ }
+ handled = 1;
+ } else {
+ shost_printk(KERN_NOTICE, instance, "interrupt without IRQ bit\n");
+ }
+
+ spin_unlock_irqrestore(instance->host_lock, flags);
+
+ return IRQ_RETVAL(handled);
}
#endif
@@ -1218,8 +1247,9 @@ static int NCR5380_select(struct Scsi_Ho
if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_reselect(instance);
+ if (!hostdata->connected)
+ NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
printk("scsi%d : reselection after won arbitration?\n", instance->host_no);
- NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return -1;
}
@@ -1563,9 +1593,10 @@ static int NCR5380_transfer_dma(struct S
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
#ifdef REAL_DMA
- NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_EOP_INTR | MR_MONITOR_BSY);
+ NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
+ MR_ENABLE_EOP_INTR);
#elif defined(REAL_DMA_POLL)
- NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE);
+ NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY);
#else
/*
* Note : on my sample board, watch-dog timeouts occurred when interrupts
@@ -1573,13 +1604,11 @@ static int NCR5380_transfer_dma(struct S
* before the setting of DMA mode to after transfer of the last byte.
*/
- /* KLL May need eop and parity in 53c400 */
if (hostdata->flags & FLAG_NCR53C400)
- NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE |
- MR_ENABLE_PAR_CHECK | MR_ENABLE_PAR_INTR |
- MR_ENABLE_EOP_INTR | MR_MONITOR_BSY);
+ NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
+ MR_ENABLE_EOP_INTR);
else
- NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE);
+ NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY);
#endif /* def REAL_DMA */
dprintk(NDEBUG_DMA, "scsi%d : mode reg = 0x%X\n", instance->host_no, NCR5380_read(MODE_REG));
@@ -1768,16 +1797,7 @@ static int NCR5380_transfer_dma(struct S
}
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
-
- if ((!(p & SR_IO)) && (hostdata->flags & FLAG_NCR53C400)) {
- dprintk(NDEBUG_C400_PWRITE, "53C400w: Checking for IRQ\n");
- if (NCR5380_read(BUS_AND_STATUS_REG) & BASR_IRQ) {
- dprintk(NDEBUG_C400_PWRITE, "53C400w: got it, reading reset interrupt reg\n");
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- } else {
- printk("53C400w: IRQ NOT THERE!\n");
- }
- }
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
*data = d + c;
*count = 0;
*phase = NCR5380_read(STATUS_REG) & PHASE_MASK;
@@ -2269,7 +2289,6 @@ static void NCR5380_dma_complete(NCR5380
NCR5380_poll_politely(instance, BUS_AND_STATUS_REG, BASR_ACK, 0, 5*HZ);
- NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
/*
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:03:48.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:03:50.000000000 +1100
@@ -1144,12 +1144,6 @@ static void NCR5380_dma_complete(struct
int saved_data = 0, overrun = 0;
unsigned char p;
- if (!hostdata->connected) {
- printk(KERN_WARNING "scsi%d: received end of DMA interrupt with "
- "no connected cmd\n", HOSTNO);
- return;
- }
-
if (hostdata->read_overruns) {
p = hostdata->connected->SCp.phase;
if (p & SR_IO) {
@@ -1164,10 +1158,6 @@ static void NCR5380_dma_complete(struct
}
}
- dprintk(NDEBUG_DMA, "scsi%d: real DMA transfer complete, basr 0x%X, sr 0x%X\n",
- HOSTNO, NCR5380_read(BUS_AND_STATUS_REG),
- NCR5380_read(STATUS_REG));
-
#if defined(CONFIG_SUN3)
if ((sun3scsi_dma_finish(rq_data_dir(hostdata->connected->request)))) {
pr_err("scsi%d: overrun in UDC counter -- not prepared to deal with this!\n",
@@ -1186,9 +1176,9 @@ static void NCR5380_dma_complete(struct
}
#endif
- (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(MODE_REG, MR_BASE);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
transferred = hostdata->dma_len - NCR5380_dma_residual(instance);
hostdata->dma_len = 0;
@@ -1227,83 +1217,97 @@ static void NCR5380_dma_complete(struct
* Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses
* from the disconnected queue, and restarting NCR5380_main()
* as required.
+ *
+ * The chip can assert IRQ in any of six different conditions. The IRQ flag
+ * is then cleared by reading the Reset Parity/Interrupt Register (RPIR).
+ * Three of these six conditions are latched in the Bus and Status Register:
+ * - End of DMA (cleared by ending DMA Mode)
+ * - Parity error (cleared by reading RPIR)
+ * - Loss of BSY (cleared by reading RPIR)
+ * Two conditions have flag bits that are not latched:
+ * - Bus phase mismatch (non-maskable in DMA Mode, cleared by ending DMA Mode)
+ * - Bus reset (non-maskable)
+ * The remaining condition has no flag bit at all:
+ * - Selection/reselection
+ *
+ * Hence, establishing the cause(s) of any interrupt is partly guesswork.
+ * In "The DP8490 and DP5380 Comparison Guide", National Semiconductor
+ * claimed that "the design of the [DP8490] interrupt logic ensures
+ * interrupts will not be lost (they can be on the DP5380)."
+ * The L5380/53C80 datasheet from LOGIC Devices has more details.
+ *
+ * Checking for bus reset by reading RST is futile because of interrupt
+ * latency, but a bus reset will reset chip logic. Checking for parity error
+ * is unnecessary because that interrupt is never enabled. A Loss of BSY
+ * condition will clear DMA Mode. We can tell when this occurs because the
+ * the Busy Monitor interrupt is enabled together with DMA Mode.
*/
static irqreturn_t NCR5380_intr(int irq, void *dev_id)
{
struct Scsi_Host *instance = dev_id;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
- int done = 1, handled = 0;
+ int handled = 0;
unsigned char basr;
- dprintk(NDEBUG_INTR, "scsi%d: NCR5380 irq triggered\n", HOSTNO);
-
- /* Look for pending interrupts */
basr = NCR5380_read(BUS_AND_STATUS_REG);
- dprintk(NDEBUG_INTR, "scsi%d: BASR=%02x\n", HOSTNO, basr);
- /* dispatch to appropriate routine if found and done=0 */
if (basr & BASR_IRQ) {
- NCR5380_dprint(NDEBUG_INTR, instance);
- if ((NCR5380_read(STATUS_REG) & (SR_SEL|SR_IO)) == (SR_SEL|SR_IO)) {
- done = 0;
- dprintk(NDEBUG_INTR, "scsi%d: SEL interrupt\n", HOSTNO);
- NCR5380_reselect(instance);
- (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- } else if (basr & BASR_PARITY_ERROR) {
- dprintk(NDEBUG_INTR, "scsi%d: PARITY interrupt\n", HOSTNO);
- (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- } else if ((NCR5380_read(STATUS_REG) & SR_RST) == SR_RST) {
- dprintk(NDEBUG_INTR, "scsi%d: RESET interrupt\n", HOSTNO);
- (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- } else {
- /*
- * The rest of the interrupt conditions can occur only during a
- * DMA transfer
- */
+ unsigned char mr = NCR5380_read(MODE_REG);
+ unsigned char sr = NCR5380_read(STATUS_REG);
+
+ dprintk(NDEBUG_INTR, "scsi%d: IRQ %d, BASR 0x%02x, SR 0x%02x, MR 0x%02x\n",
+ HOSTNO, irq, basr, sr, mr);
#if defined(REAL_DMA)
- /*
- * We should only get PHASE MISMATCH and EOP interrupts if we have
- * DMA enabled, so do a sanity check based on the current setting
- * of the MODE register.
+ if ((mr & MR_DMA_MODE) || (mr & MR_MONITOR_BSY)) {
+ /* Probably End of DMA, Phase Mismatch or Loss of BSY.
+ * We ack IRQ after clearing Mode Register. Workarounds
+ * for End of DMA errata need to happen in DMA Mode.
*/
- if ((NCR5380_read(MODE_REG) & MR_DMA_MODE) &&
- ((basr & BASR_END_DMA_TRANSFER) ||
- !(basr & BASR_PHASE_MATCH))) {
-
- dprintk(NDEBUG_INTR, "scsi%d: PHASE MISM or EOP interrupt\n", HOSTNO);
- NCR5380_dma_complete( instance );
- done = 0;
- } else
+ dprintk(NDEBUG_INTR, "scsi%d: interrupt in DMA mode\n", HOSTNO);
+
+ if (hostdata->connected) {
+ NCR5380_dma_complete(instance);
+ queue_work(hostdata->work_q, &hostdata->main_task);
+ } else {
+ NCR5380_write(MODE_REG, MR_BASE);
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+ }
+ } else
#endif /* REAL_DMA */
- {
-/* MS: Ignore unknown phase mismatch interrupts (caused by EOP interrupt) */
- if (basr & BASR_PHASE_MATCH)
- dprintk(NDEBUG_INTR, "scsi%d: unknown interrupt, "
- "BASR 0x%x, MR 0x%x, SR 0x%x\n",
- HOSTNO, basr, NCR5380_read(MODE_REG),
- NCR5380_read(STATUS_REG));
- (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+ if ((NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_mask) &&
+ (sr & (SR_SEL | SR_IO | SR_BSY | SR_RST)) == (SR_SEL | SR_IO)) {
+ /* Probably reselected */
+ NCR5380_write(SELECT_ENABLE_REG, 0);
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+
+ dprintk(NDEBUG_INTR, "scsi%d: interrupt with SEL and IO\n",
+ HOSTNO);
+
+ if (!hostdata->connected) {
+ NCR5380_reselect(instance);
+ queue_work(hostdata->work_q, &hostdata->main_task);
+ }
+ if (!hostdata->connected)
+ NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
+ } else {
+ /* Probably Bus Reset */
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+
+ dprintk(NDEBUG_INTR, "scsi%d: unknown interrupt\n", HOSTNO);
#ifdef SUN3_SCSI_VME
- dregs->csr |= CSR_DMA_ENABLE;
+ dregs->csr |= CSR_DMA_ENABLE;
#endif
- }
- } /* if !(SELECTION || PARITY) */
+ }
handled = 1;
- } /* BASR & IRQ */ else {
- printk(KERN_NOTICE "scsi%d: interrupt without IRQ bit set in BASR, "
- "BASR 0x%X, MR 0x%X, SR 0x%x\n", HOSTNO, basr,
- NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG));
- (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+ } else {
+ shost_printk(KERN_NOTICE, instance, "interrupt without IRQ bit\n");
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_DMA_ENABLE;
#endif
}
- if (!done)
- queue_work(hostdata->work_q, &hostdata->main_task);
-
return IRQ_RETVAL(handled);
}
@@ -1509,9 +1513,10 @@ static int NCR5380_select(struct Scsi_Ho
if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_reselect(instance);
+ if (!hostdata->connected)
+ NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
printk(KERN_ERR "scsi%d: reselection after won arbitration?\n",
HOSTNO);
- NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return -1;
}
@@ -1871,19 +1876,14 @@ static int NCR5380_transfer_dma(struct S
/* send start chain */
sun3scsi_dma_start(c, *data);
+ NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
+ NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
+ MR_ENABLE_EOP_INTR);
if (p & SR_IO) {
- NCR5380_write(TARGET_COMMAND_REG, 1);
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(INITIATOR_COMMAND_REG, 0);
- NCR5380_write(MODE_REG,
- (NCR5380_read(MODE_REG) | MR_DMA_MODE | MR_ENABLE_EOP_INTR));
NCR5380_write(START_DMA_INITIATOR_RECEIVE_REG, 0);
} else {
- NCR5380_write(TARGET_COMMAND_REG, 0);
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_DATA);
- NCR5380_write(MODE_REG,
- (NCR5380_read(MODE_REG) | MR_DMA_MODE | MR_ENABLE_EOP_INTR));
NCR5380_write(START_DMA_SEND_REG, 0);
}
@@ -1912,10 +1912,8 @@ static int NCR5380_transfer_dma(struct S
c, (p & SR_IO) ? "to" : "from", d);
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
-
-#ifdef REAL_DMA
- NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_EOP_INTR | MR_MONITOR_BSY);
-#endif /* def REAL_DMA */
+ NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
+ MR_ENABLE_EOP_INTR);
if (!(hostdata->flags & FLAG_LATE_DMA_SETUP)) {
/* On the Medusa, it is a must to initialize the DMA before
@@ -2389,10 +2387,10 @@ static void NCR5380_information_transfer
#endif
hostdata->connected = NULL;
cmd->result = DID_ERROR << 16;
- NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
maybe_release_dma_irq(instance);
local_irq_restore(flags);
cmd->scsi_done(cmd);
+ NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return;
}
msgout = NOP;
Index: linux/drivers/scsi/dtc.c
===================================================================
--- linux.orig/drivers/scsi/dtc.c 2016-01-03 16:03:49.000000000 +1100
+++ linux/drivers/scsi/dtc.c 2016-01-03 16:03:50.000000000 +1100
@@ -334,8 +334,6 @@ static inline int NCR5380_pread(struct S
struct NCR5380_hostdata *hostdata = shost_priv(instance);
i = 0;
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
if (instance->irq == NO_IRQ)
NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ);
else
@@ -357,9 +355,7 @@ static inline int NCR5380_pread(struct S
rtrc(4);
while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
++i;
- NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
rtrc(0);
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
if (i > hostdata->spin_max_r)
hostdata->spin_max_r = i;
return (0);
@@ -383,9 +379,6 @@ static inline int NCR5380_pwrite(struct
int i;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
- /* set direction (write) */
if (instance->irq == NO_IRQ)
NCR5380_write(DTC_CONTROL_REG, 0);
else
@@ -410,7 +403,6 @@ static inline int NCR5380_pwrite(struct
++i;
rtrc(7);
/* Check for parity error here. fixme. */
- NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
rtrc(0);
if (i > hostdata->spin_max_w)
hostdata->spin_max_w = i;
Index: linux/drivers/scsi/g_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/g_NCR5380.c 2016-01-03 16:03:33.000000000 +1100
+++ linux/drivers/scsi/g_NCR5380.c 2016-01-03 16:03:50.000000000 +1100
@@ -594,8 +594,6 @@ static inline int NCR5380_pread(struct S
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
printk(KERN_ERR "53C400r: no end dma signal\n");
- NCR5380_write(MODE_REG, MR_BASE);
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
return 0;
}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 65/78] atari_scsi, sun3_scsi: Remove global Scsi_Host pointer |
| Message-ID | <qMJoU-1cG-53@gated-at.bofh.it> |
| In reply to | #1300181 |
This refactoring removes two global Scsi_Host pointers. This
improves consistency with other ncr5380 drivers. Adopting the same
conventions as the other drivers makes them easier to read.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
drivers/scsi/atari_NCR5380.c | 5 +-
drivers/scsi/atari_scsi.c | 29 ++++++++---------
drivers/scsi/sun3_scsi.c | 72 ++++++++++---------------------------------
3 files changed, 36 insertions(+), 70 deletions(-)
Index: linux/drivers/scsi/atari_scsi.c
===================================================================
--- linux.orig/drivers/scsi/atari_scsi.c 2016-01-03 16:04:20.000000000 +1100
+++ linux/drivers/scsi/atari_scsi.c 2016-01-03 16:04:36.000000000 +1100
@@ -159,14 +159,10 @@ static inline unsigned long SCSI_DMA_GET
return adr;
}
-#define HOSTDATA_DMALEN (((struct NCR5380_hostdata *) \
- (atari_scsi_host->hostdata))->dma_len)
-
#ifdef REAL_DMA
static void atari_scsi_fetch_restbytes(void);
#endif
-static struct Scsi_Host *atari_scsi_host;
static unsigned char (*atari_scsi_reg_read)(unsigned char reg);
static void (*atari_scsi_reg_write)(unsigned char reg, unsigned char value);
@@ -262,15 +258,17 @@ static void scsi_dma_buserr(int irq, voi
#endif
-static irqreturn_t scsi_tt_intr(int irq, void *dummy)
+static irqreturn_t scsi_tt_intr(int irq, void *dev)
{
#ifdef REAL_DMA
+ struct Scsi_Host *instance = dev;
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
int dma_stat;
dma_stat = tt_scsi_dma.dma_ctrl;
- dprintk(NDEBUG_INTR, "scsi%d: NCR5380 interrupt, DMA status = %02x\n",
- atari_scsi_host->host_no, dma_stat & 0xff);
+ dsprintk(NDEBUG_INTR, instance, "NCR5380 interrupt, DMA status = %02x\n",
+ dma_stat & 0xff);
/* Look if it was the DMA that has interrupted: First possibility
* is that a bus error occurred...
@@ -293,7 +291,8 @@ static irqreturn_t scsi_tt_intr(int irq,
* data reg!
*/
if ((dma_stat & 0x02) && !(dma_stat & 0x40)) {
- atari_dma_residual = HOSTDATA_DMALEN - (SCSI_DMA_READ_P(dma_addr) - atari_dma_startaddr);
+ atari_dma_residual = hostdata->dma_len -
+ (SCSI_DMA_READ_P(dma_addr) - atari_dma_startaddr);
dprintk(NDEBUG_DMA, "SCSI DMA: There are %ld residual bytes.\n",
atari_dma_residual);
@@ -345,15 +344,17 @@ static irqreturn_t scsi_tt_intr(int irq,
#endif /* REAL_DMA */
- NCR5380_intr(irq, dummy);
+ NCR5380_intr(irq, dev);
return IRQ_HANDLED;
}
-static irqreturn_t scsi_falcon_intr(int irq, void *dummy)
+static irqreturn_t scsi_falcon_intr(int irq, void *dev)
{
#ifdef REAL_DMA
+ struct Scsi_Host *instance = dev;
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
int dma_stat;
/* Turn off DMA and select sector counter register before
@@ -388,7 +389,7 @@ static irqreturn_t scsi_falcon_intr(int
printk(KERN_ERR "SCSI DMA error: %ld bytes lost in "
"ST-DMA fifo\n", transferred & 15);
- atari_dma_residual = HOSTDATA_DMALEN - transferred;
+ atari_dma_residual = hostdata->dma_len - transferred;
dprintk(NDEBUG_DMA, "SCSI DMA: There are %ld residual bytes.\n",
atari_dma_residual);
} else
@@ -400,13 +401,14 @@ static irqreturn_t scsi_falcon_intr(int
* data to the original destination address.
*/
memcpy(atari_dma_orig_addr, phys_to_virt(atari_dma_startaddr),
- HOSTDATA_DMALEN - atari_dma_residual);
+ hostdata->dma_len - atari_dma_residual);
atari_dma_orig_addr = NULL;
}
#endif /* REAL_DMA */
- NCR5380_intr(irq, dummy);
+ NCR5380_intr(irq, dev);
+
return IRQ_HANDLED;
}
@@ -873,7 +875,6 @@ static int __init atari_scsi_probe(struc
error = -ENOMEM;
goto fail_alloc;
}
- atari_scsi_host = instance;
instance->irq = irq->start;
Index: linux/drivers/scsi/sun3_scsi.c
===================================================================
--- linux.orig/drivers/scsi/sun3_scsi.c 2016-01-03 16:04:20.000000000 +1100
+++ linux/drivers/scsi/sun3_scsi.c 2016-01-03 16:04:36.000000000 +1100
@@ -56,9 +56,9 @@
#define NCR5380_info sun3scsi_info
#define NCR5380_dma_read_setup(instance, data, count) \
- sun3scsi_dma_setup(data, count, 0)
+ sun3scsi_dma_setup(instance, data, count, 0)
#define NCR5380_dma_write_setup(instance, data, count) \
- sun3scsi_dma_setup(data, count, 1)
+ sun3scsi_dma_setup(instance, data, count, 1)
#define NCR5380_dma_residual(instance) \
sun3scsi_dma_residual(instance)
#define NCR5380_dma_xfer_len(instance, cmd, phase) \
@@ -99,7 +99,6 @@ static unsigned char *sun3_dma_orig_addr
static unsigned long sun3_dma_orig_count;
static int sun3_dma_active;
static unsigned long last_residual;
-static struct Scsi_Host *default_instance;
/*
* NCR 5380 register access functions
@@ -142,8 +141,9 @@ static inline void sun3_udc_write(unsign
// safe bits for the CSR
#define CSR_GOOD 0x060f
-static irqreturn_t scsi_sun3_intr(int irq, void *dummy)
+static irqreturn_t scsi_sun3_intr(int irq, void *dev)
{
+ struct Scsi_Host *instance = dev;
unsigned short csr = dregs->csr;
int handled = 0;
@@ -152,46 +152,24 @@ static irqreturn_t scsi_sun3_intr(int ir
#endif
if(csr & ~CSR_GOOD) {
- if(csr & CSR_DMA_BUSERR) {
- printk("scsi%d: bus error in dma\n", default_instance->host_no);
- }
-
- if(csr & CSR_DMA_CONFLICT) {
- printk("scsi%d: dma conflict\n", default_instance->host_no);
- }
+ if (csr & CSR_DMA_BUSERR)
+ shost_printk(KERN_ERR, instance, "bus error in DMA\n");
+ if (csr & CSR_DMA_CONFLICT)
+ shost_printk(KERN_ERR, instance, "DMA conflict\n");
handled = 1;
}
if(csr & (CSR_SDB_INT | CSR_DMA_INT)) {
- NCR5380_intr(irq, dummy);
+ NCR5380_intr(irq, dev);
handled = 1;
}
return IRQ_RETVAL(handled);
}
-/*
- * Debug stuff - to be called on NMI, or sysrq key. Use at your own risk;
- * reentering NCR5380_print_status seems to have ugly side effects
- */
-
-/* this doesn't seem to get used at all -- sam */
-#if 0
-void sun3_sun3_debug (void)
-{
- unsigned long flags;
-
- if (default_instance) {
- local_irq_save(flags);
- NCR5380_print_status(default_instance);
- local_irq_restore(flags);
- }
-}
-#endif
-
-
/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
-static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
+static unsigned long sun3scsi_dma_setup(struct Scsi_Host *instance,
+ void *data, unsigned long count, int write_flag)
{
void *addr;
@@ -243,10 +221,9 @@ static unsigned long sun3scsi_dma_setup(
dregs->csr |= CSR_FIFO;
if(dregs->fifo_count != count) {
- printk("scsi%d: fifo_mismatch %04x not %04x\n",
- default_instance->host_no, dregs->fifo_count,
- (unsigned int) count);
- NCR5380_dprint(NDEBUG_DMA, default_instance);
+ shost_printk(KERN_ERR, instance, "FIFO mismatch %04x not %04x\n",
+ dregs->fifo_count, (unsigned int) count);
+ NCR5380_dprint(NDEBUG_DMA, instance);
}
/* setup udc */
@@ -281,21 +258,6 @@ static unsigned long sun3scsi_dma_setup(
}
-#ifndef SUN3_SCSI_VME
-static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance)
-{
- unsigned short resid;
-
- dregs->udc_addr = 0x32;
- udelay(SUN3_DMA_DELAY);
- resid = dregs->udc_data;
- udelay(SUN3_DMA_DELAY);
- resid *= 2;
-
- return (unsigned long) resid;
-}
-#endif
-
static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
{
return last_residual;
@@ -393,7 +355,10 @@ static int sun3scsi_dma_finish(int write
}
}
- count = sun3scsi_dma_count(default_instance);
+ dregs->udc_addr = 0x32;
+ udelay(SUN3_DMA_DELAY);
+ count = 2 * dregs->udc_data;
+ udelay(SUN3_DMA_DELAY);
fifo = dregs->fifo_count;
last_residual = fifo;
@@ -547,7 +512,6 @@ static int __init sun3_scsi_probe(struct
error = -ENOMEM;
goto fail_alloc;
}
- default_instance = instance;
instance->io_port = (unsigned long)ioaddr;
instance->irq = irq->start;
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:34.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:36.000000000 +1100
@@ -1920,7 +1920,7 @@ static void NCR5380_information_transfer
/* this command setup for dma yet? */
if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != cmd)) {
if (cmd->request->cmd_type == REQ_TYPE_FS) {
- sun3scsi_dma_setup(d, count,
+ sun3scsi_dma_setup(instance, d, count,
rq_data_dir(cmd->request));
sun3_dma_setup_done = cmd;
}
@@ -2458,7 +2458,8 @@ static void NCR5380_reselect(struct Scsi
}
/* setup this command for dma if not already */
if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != tmp)) {
- sun3scsi_dma_setup(d, count, rq_data_dir(tmp->request));
+ sun3scsi_dma_setup(instance, d, count,
+ rq_data_dir(tmp->request));
sun3_dma_setup_done = tmp;
}
}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 57/78] ncr5380: Use standard list data structure |
| Message-ID | <qMJoU-1cG-55@gated-at.bofh.it> |
| In reply to | #1300181 |
The NCR5380 drivers have a home-spun linked list implementation for
scsi_cmnd structs that uses cmd->host_scribble as a 'next' pointer. Adopt
the standard list_head data structure and list operations instead. Remove
the eh_abort_handler rather than convert it. Doing the conversion would
only be churn because the existing EH handlers don't work and get replaced
in a subsequent patch.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
Changed since v2:
- Fix NULL pointer dereference in NCR5380_reselect() when SUPPORT_TAGS is
enabled in the atari_NCR5380.c core driver.
---
drivers/scsi/NCR5380.c | 214 +++++---------------------------
drivers/scsi/NCR5380.h | 16 ++
drivers/scsi/arm/cumana_1.c | 1
drivers/scsi/arm/oak.c | 1
drivers/scsi/atari_NCR5380.c | 287 ++++++-------------------------------------
drivers/scsi/atari_scsi.c | 1
drivers/scsi/dmx3191d.c | 1
drivers/scsi/dtc.c | 1
drivers/scsi/g_NCR5380.c | 1
drivers/scsi/mac_scsi.c | 1
drivers/scsi/pas16.c | 1
drivers/scsi/sun3_scsi.c | 1
drivers/scsi/t128.c | 1
13 files changed, 106 insertions(+), 421 deletions(-)
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2016-01-03 16:04:18.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2016-01-03 16:04:20.000000000 +1100
@@ -622,8 +622,9 @@ static int NCR5380_init(struct Scsi_Host
#endif
spin_lock_init(&hostdata->lock);
hostdata->connected = NULL;
- hostdata->issue_queue = NULL;
- hostdata->disconnected_queue = NULL;
+ INIT_LIST_HEAD(&hostdata->unissued);
+ INIT_LIST_HEAD(&hostdata->disconnected);
+
hostdata->flags = flags;
INIT_WORK(&hostdata->main_task, NCR5380_main);
@@ -738,7 +739,7 @@ static int NCR5380_queue_command(struct
struct scsi_cmnd *cmd)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
- struct scsi_cmnd *tmp;
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
unsigned long flags;
#if (NDEBUG & NDEBUG_NO_WRITE)
@@ -752,12 +753,6 @@ static int NCR5380_queue_command(struct
}
#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
- /*
- * We use the host_scribble field as a pointer to the next command
- * in a queue
- */
-
- cmd->host_scribble = NULL;
cmd->result = 0;
spin_lock_irqsave(&hostdata->lock, flags);
@@ -769,13 +764,11 @@ static int NCR5380_queue_command(struct
* sense data is only guaranteed to be valid while the condition exists.
*/
- if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
- cmd->host_scribble = (unsigned char *) hostdata->issue_queue;
- hostdata->issue_queue = cmd;
- } else {
- for (tmp = (struct scsi_cmnd *) hostdata->issue_queue; tmp->host_scribble; tmp = (struct scsi_cmnd *) tmp->host_scribble);
- tmp->host_scribble = (unsigned char *) cmd;
- }
+ if (cmd->cmnd[0] == REQUEST_SENSE)
+ list_add(&ncmd->list, &hostdata->unissued);
+ else
+ list_add_tail(&ncmd->list, &hostdata->unissued);
+
spin_unlock_irqrestore(&hostdata->lock, flags);
dsprintk(NDEBUG_QUEUES, instance, "command %p added to %s of queue\n",
@@ -803,7 +796,7 @@ static void NCR5380_main(struct work_str
struct NCR5380_hostdata *hostdata =
container_of(work, struct NCR5380_hostdata, main_task);
struct Scsi_Host *instance = hostdata->host;
- struct scsi_cmnd *tmp, *prev;
+ struct NCR5380_cmd *ncmd, *n;
int done;
spin_lock_irq(&hostdata->lock);
@@ -816,23 +809,20 @@ static void NCR5380_main(struct work_str
* Search through the issue_queue for a command destined
* for a target that's not busy.
*/
- for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, prev = NULL; tmp; prev = tmp, tmp = (struct scsi_cmnd *) tmp->host_scribble)
- {
+ list_for_each_entry_safe(ncmd, n, &hostdata->unissued,
+ list) {
+ struct scsi_cmnd *tmp = NCR5380_to_scmd(ncmd);
+
dsprintk(NDEBUG_QUEUES, instance, "main: tmp=%p target=%d busy=%d lun=%llu\n",
tmp, scmd_id(tmp), hostdata->busy[scmd_id(tmp)],
tmp->device->lun);
/* When we find one, remove it from the issue queue. */
if (!(hostdata->busy[tmp->device->id] &
(1 << (u8)(tmp->device->lun & 0xff)))) {
- if (prev) {
- prev->host_scribble = tmp->host_scribble;
- } else {
- hostdata->issue_queue = (struct scsi_cmnd *) tmp->host_scribble;
- }
- tmp->host_scribble = NULL;
+ list_del(&ncmd->list);
dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES,
- instance, "main: removed %p from issue queue %p\n",
- tmp, prev);
+ instance, "main: removed %p from issue queue\n",
+ tmp);
/*
* Attempt to establish an I_T_L nexus here.
@@ -851,8 +841,7 @@ static void NCR5380_main(struct work_str
/* OK or bad target */
} else {
/* Need to retry */
- tmp->host_scribble = (unsigned char *) hostdata->issue_queue;
- hostdata->issue_queue = tmp;
+ list_add(&ncmd->list, &hostdata->unissued);
dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES,
instance, "main: select() failed, %p returned to issue queue\n",
tmp);
@@ -1744,6 +1733,8 @@ static void NCR5380_information_transfer
struct scsi_cmnd *cmd;
while ((cmd = hostdata->connected)) {
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
+
tmp = NCR5380_read(STATUS_REG);
/* We only have a valid SCSI phase when REQ is asserted */
if (tmp & SR_REQ) {
@@ -1875,9 +1866,7 @@ static void NCR5380_information_transfer
if ((cmd->cmnd[0] != REQUEST_SENSE) && (status_byte(cmd->SCp.Status) == CHECK_CONDITION)) {
scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
- cmd->host_scribble = (unsigned char *)
- hostdata->issue_queue;
- hostdata->issue_queue = (struct scsi_cmnd *) cmd;
+ list_add(&ncmd->list, &hostdata->unissued);
dsprintk(NDEBUG_AUTOSENSE | NDEBUG_QUEUES,
instance, "REQUEST SENSE cmd %p added to head of issue queue\n",
cmd);
@@ -1911,10 +1900,8 @@ static void NCR5380_information_transfer
case DISCONNECT:{
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- cmd->host_scribble = (unsigned char *)
- hostdata->disconnected_queue;
hostdata->connected = NULL;
- hostdata->disconnected_queue = cmd;
+ list_add(&ncmd->list, &hostdata->disconnected);
dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES,
instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
cmd, scmd_id(cmd), cmd->device->lun);
@@ -2087,7 +2074,8 @@ static void NCR5380_reselect(struct Scsi
int len;
unsigned char msg[3];
unsigned char *data;
- struct scsi_cmnd *tmp = NULL, *prev;
+ struct NCR5380_cmd *ncmd;
+ struct scsi_cmnd *tmp;
/*
* Disable arbitration, etc. since the host adapter obviously
@@ -2156,16 +2144,14 @@ static void NCR5380_reselect(struct Scsi
* just reestablished, and remove it from the disconnected queue.
*/
- for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue, prev = NULL;
- tmp; prev = tmp, tmp = (struct scsi_cmnd *) tmp->host_scribble) {
- if ((target_mask == (1 << tmp->device->id)) && (lun == (u8)tmp->device->lun)) {
- if (prev) {
- prev->host_scribble = tmp->host_scribble;
- } else {
- hostdata->disconnected_queue =
- (struct scsi_cmnd *) tmp->host_scribble;
- }
- tmp->host_scribble = NULL;
+ tmp = NULL;
+ list_for_each_entry(ncmd, &hostdata->disconnected, list) {
+ struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
+
+ if (target_mask == (1 << scmd_id(cmd)) &&
+ lun == (u8)cmd->device->lun) {
+ list_del(&ncmd->list);
+ tmp = cmd;
break;
}
}
@@ -2261,146 +2247,18 @@ static int NCR5380_abort(struct scsi_cmn
{
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
- struct scsi_cmnd *tmp, **prev;
unsigned long flags;
- scmd_printk(KERN_WARNING, cmd, "aborting command\n");
-
spin_lock_irqsave(&hostdata->lock, flags);
+#if (NDEBUG & NDEBUG_ANY)
+ scmd_printk(KERN_INFO, cmd, "aborting command\n");
+#endif
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
- dprintk(NDEBUG_ABORT, "scsi%d : abort called\n", instance->host_no);
- dprintk(NDEBUG_ABORT, " basr 0x%X, sr 0x%X\n", NCR5380_read(BUS_AND_STATUS_REG), NCR5380_read(STATUS_REG));
-
-#if 0
-/*
- * Case 1 : If the command is the currently executing command,
- * we'll set the aborted flag and return control so that
- * information transfer routine can exit cleanly.
- */
-
- if (hostdata->connected == cmd) {
- dprintk(NDEBUG_ABORT, "scsi%d : aborting connected command\n", instance->host_no);
-/*
- * We should perform BSY checking, and make sure we haven't slipped
- * into BUS FREE.
- */
-
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_ATN);
-/*
- * Since we can't change phases until we've completed the current
- * handshake, we have to source or sink a byte of data if the current
- * phase is not MSGOUT.
- */
-
-/*
- * Return control to the executing NCR drive so we can clear the
- * aborted flag and get back into our main loop.
- */
-
- return SUCCESS;
- }
-#endif
-
-/*
- * Case 2 : If the command hasn't been issued yet, we simply remove it
- * from the issue queue.
- */
-
- dprintk(NDEBUG_ABORT, "scsi%d : abort going into loop.\n", instance->host_no);
- for (prev = (struct scsi_cmnd **) &(hostdata->issue_queue), tmp = (struct scsi_cmnd *) hostdata->issue_queue; tmp; prev = (struct scsi_cmnd **) &(tmp->host_scribble), tmp = (struct scsi_cmnd *) tmp->host_scribble)
- if (cmd == tmp) {
- (*prev) = (struct scsi_cmnd *) tmp->host_scribble;
- tmp->host_scribble = NULL;
- spin_unlock_irqrestore(&hostdata->lock, flags);
- tmp->result = DID_ABORT << 16;
- dprintk(NDEBUG_ABORT, "scsi%d : abort removed command from issue queue.\n", instance->host_no);
- tmp->scsi_done(tmp);
- return SUCCESS;
- }
-#if (NDEBUG & NDEBUG_ABORT)
- /* KLL */
- else if (prev == tmp)
- printk(KERN_ERR "scsi%d : LOOP\n", instance->host_no);
-#endif
-
-/*
- * Case 3 : If any commands are connected, we're going to fail the abort
- * and let the high level SCSI driver retry at a later time or
- * issue a reset.
- *
- * Timeouts, and therefore aborted commands, will be highly unlikely
- * and handling them cleanly in this situation would make the common
- * case of noresets less efficient, and would pollute our code. So,
- * we fail.
- */
-
- if (hostdata->connected) {
- spin_unlock_irqrestore(&hostdata->lock, flags);
- dprintk(NDEBUG_ABORT, "scsi%d : abort failed, command connected.\n", instance->host_no);
- return FAILED;
- }
-/*
- * Case 4: If the command is currently disconnected from the bus, and
- * there are no connected commands, we reconnect the I_T_L or
- * I_T_L_Q nexus associated with it, go into message out, and send
- * an abort message.
- *
- * This case is especially ugly. In order to reestablish the nexus, we
- * need to call NCR5380_select(). The easiest way to implement this
- * function was to abort if the bus was busy, and let the interrupt
- * handler triggered on the SEL for reselect take care of lost arbitrations
- * where necessary, meaning interrupts need to be enabled.
- *
- * When interrupts are enabled, the queues may change - so we
- * can't remove it from the disconnected queue before selecting it
- * because that could cause a failure in hashing the nexus if that
- * device reselected.
- *
- * Since the queues may change, we can't use the pointers from when we
- * first locate it.
- *
- * So, we must first locate the command, and if NCR5380_select()
- * succeeds, then issue the abort, relocate the command and remove
- * it from the disconnected queue.
- */
-
- for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp; tmp = (struct scsi_cmnd *) tmp->host_scribble)
- if (cmd == tmp) {
- dprintk(NDEBUG_ABORT, "scsi%d : aborting disconnected command.\n", instance->host_no);
-
- if (NCR5380_select(instance, cmd)) {
- spin_unlock_irq(&hostdata->lock);
- return FAILED;
- }
- dprintk(NDEBUG_ABORT, "scsi%d : nexus reestablished.\n", instance->host_no);
-
- do_abort(instance);
-
- for (prev = (struct scsi_cmnd **) &(hostdata->disconnected_queue), tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp; prev = (struct scsi_cmnd **) &(tmp->host_scribble), tmp = (struct scsi_cmnd *) tmp->host_scribble)
- if (cmd == tmp) {
- *prev = (struct scsi_cmnd *) tmp->host_scribble;
- tmp->host_scribble = NULL;
- spin_unlock_irqrestore(&hostdata->lock, flags);
- tmp->result = DID_ABORT << 16;
- tmp->scsi_done(tmp);
- return SUCCESS;
- }
- }
-/*
- * Case 5 : If we reached this point, the command was not found in any of
- * the queues.
- *
- * We probably reached this point because of an unlikely race condition
- * between the command completing successfully and the abortion code,
- * so we won't panic, but we will notify the user in case something really
- * broke.
- */
spin_unlock_irqrestore(&hostdata->lock, flags);
- printk(KERN_WARNING "scsi%d : warning : SCSI command probably completed successfully\n"
- " before abortion\n", instance->host_no);
+
return FAILED;
}
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:19.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:20.000000000 +1100
@@ -175,10 +175,6 @@
* possible) function may be used.
*/
-#define NEXT(cmd) ((struct scsi_cmnd *)(cmd)->host_scribble)
-#define SET_NEXT(cmd,next) ((cmd)->host_scribble = (void *)(next))
-#define NEXTADDR(cmd) ((struct scsi_cmnd **)&(cmd)->host_scribble)
-
#define HOSTNO instance->host_no
static int do_abort(struct Scsi_Host *);
@@ -665,8 +661,9 @@ static int __init NCR5380_init(struct Sc
#endif
spin_lock_init(&hostdata->lock);
hostdata->connected = NULL;
- hostdata->issue_queue = NULL;
- hostdata->disconnected_queue = NULL;
+ INIT_LIST_HEAD(&hostdata->unissued);
+ INIT_LIST_HEAD(&hostdata->disconnected);
+
hostdata->flags = flags;
INIT_WORK(&hostdata->main_task, NCR5380_main);
@@ -781,7 +778,7 @@ static int NCR5380_queue_command(struct
struct scsi_cmnd *cmd)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
- struct scsi_cmnd *tmp;
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
unsigned long flags;
#if (NDEBUG & NDEBUG_NO_WRITE)
@@ -795,12 +792,6 @@ static int NCR5380_queue_command(struct
}
#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
- /*
- * We use the host_scribble field as a pointer to the next command
- * in a queue
- */
-
- SET_NEXT(cmd, NULL);
cmd->result = 0;
/*
@@ -834,15 +825,11 @@ static int NCR5380_queue_command(struct
* sense data is only guaranteed to be valid while the condition exists.
*/
- if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
- SET_NEXT(cmd, hostdata->issue_queue);
- hostdata->issue_queue = cmd;
- } else {
- for (tmp = (struct scsi_cmnd *)hostdata->issue_queue;
- NEXT(tmp); tmp = NEXT(tmp))
- ;
- SET_NEXT(tmp, cmd);
- }
+ if (cmd->cmnd[0] == REQUEST_SENSE)
+ list_add(&ncmd->list, &hostdata->unissued);
+ else
+ list_add_tail(&ncmd->list, &hostdata->unissued);
+
spin_unlock_irqrestore(&hostdata->lock, flags);
dsprintk(NDEBUG_QUEUES, instance, "command %p added to %s of queue\n",
@@ -858,8 +845,8 @@ static inline void maybe_release_dma_irq
struct NCR5380_hostdata *hostdata = shost_priv(instance);
/* Caller does the locking needed to set & test these data atomically */
- if (!hostdata->disconnected_queue &&
- !hostdata->issue_queue &&
+ if (list_empty(&hostdata->disconnected) &&
+ list_empty(&hostdata->unissued) &&
!hostdata->connected &&
!hostdata->retain_dma_intr)
NCR5380_release_dma_irq(instance);
@@ -881,7 +868,7 @@ static void NCR5380_main(struct work_str
struct NCR5380_hostdata *hostdata =
container_of(work, struct NCR5380_hostdata, main_task);
struct Scsi_Host *instance = hostdata->host;
- struct scsi_cmnd *tmp, *prev;
+ struct NCR5380_cmd *ncmd, *n;
int done;
/*
@@ -900,17 +887,9 @@ static void NCR5380_main(struct work_str
* Search through the issue_queue for a command destined
* for a target that's not busy.
*/
-#if (NDEBUG & NDEBUG_LISTS)
- for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, prev = NULL;
- tmp && (tmp != prev); prev = tmp, tmp = NEXT(tmp))
- ;
- /*printk("%p ", tmp);*/
- if ((tmp == prev) && tmp)
- printk(" LOOP\n");
- /* else printk("\n"); */
-#endif
- for (tmp = (struct scsi_cmnd *) hostdata->issue_queue,
- prev = NULL; tmp; prev = tmp, tmp = NEXT(tmp)) {
+ list_for_each_entry_safe(ncmd, n, &hostdata->unissued,
+ list) {
+ struct scsi_cmnd *tmp = NCR5380_to_scmd(ncmd);
u8 lun = tmp->device->lun;
dsprintk(NDEBUG_QUEUES, instance, "main: tmp=%p target=%d busy=%d lun=%d\n",
@@ -923,15 +902,10 @@ static void NCR5380_main(struct work_str
!(hostdata->busy[tmp->device->id] & (1 << lun))
#endif
) {
- if (prev) {
- SET_NEXT(prev, NEXT(tmp));
- } else {
- hostdata->issue_queue = NEXT(tmp);
- }
- SET_NEXT(tmp, NULL);
+ list_del(&ncmd->list);
dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES,
- instance, "main: removed %p from issue queue %p\n",
- tmp, prev);
+ instance, "main: removed %p from issue queue\n",
+ tmp);
hostdata->retain_dma_intr++;
@@ -960,8 +934,7 @@ static void NCR5380_main(struct work_str
maybe_release_dma_irq(instance);
} else {
/* Need to retry */
- SET_NEXT(tmp, hostdata->issue_queue);
- hostdata->issue_queue = tmp;
+ list_add(&ncmd->list, &hostdata->unissued);
dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES,
instance, "main: select() failed, %p returned to issue queue\n",
tmp);
@@ -1834,6 +1807,8 @@ static void NCR5380_information_transfer
#endif
while ((cmd = hostdata->connected)) {
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
+
tmp = NCR5380_read(STATUS_REG);
/* We only have a valid SCSI phase when REQ is asserted */
if (tmp & SR_REQ) {
@@ -2042,8 +2017,7 @@ static void NCR5380_information_transfer
(status_byte(cmd->SCp.Status) == CHECK_CONDITION)) {
scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
- SET_NEXT(cmd, hostdata->issue_queue);
- hostdata->issue_queue = (struct scsi_cmnd *) cmd;
+ list_add(&ncmd->list, &hostdata->unissued);
dsprintk(NDEBUG_AUTOSENSE | NDEBUG_QUEUES,
instance, "REQUEST SENSE cmd %p added to head of issue queue\n",
cmd);
@@ -2092,9 +2066,8 @@ static void NCR5380_information_transfer
case DISCONNECT:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- SET_NEXT(cmd, hostdata->disconnected_queue);
hostdata->connected = NULL;
- hostdata->disconnected_queue = cmd;
+ list_add(&ncmd->list, &hostdata->disconnected);
dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES,
instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
cmd, scmd_id(cmd), cmd->device->lun);
@@ -2288,7 +2261,8 @@ static void NCR5380_reselect(struct Scsi
unsigned char msg[3];
int __maybe_unused len;
unsigned char __maybe_unused *data, __maybe_unused phase;
- struct scsi_cmnd *tmp = NULL, *prev;
+ struct NCR5380_cmd *ncmd;
+ struct scsi_cmnd *tmp;
/*
* Disable arbitration, etc. since the host adapter obviously
@@ -2379,19 +2353,18 @@ static void NCR5380_reselect(struct Scsi
* just reestablished, and remove it from the disconnected queue.
*/
- for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue, prev = NULL;
- tmp; prev = tmp, tmp = NEXT(tmp)) {
- if ((target_mask == (1 << tmp->device->id)) && (lun == (u8)tmp->device->lun)
+ tmp = NULL;
+ list_for_each_entry(ncmd, &hostdata->disconnected, list) {
+ struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd);
+
+ if (target_mask == (1 << scmd_id(cmd)) &&
+ lun == (u8)cmd->device->lun
#ifdef SUPPORT_TAGS
- && (tag == tmp->tag)
+ && (tag == cmd->tag)
#endif
) {
- if (prev) {
- SET_NEXT(prev, NEXT(tmp));
- } else {
- hostdata->disconnected_queue = NEXT(tmp);
- }
- SET_NEXT(tmp, NULL);
+ list_del(&ncmd->list);
+ tmp = cmd;
break;
}
}
@@ -2489,188 +2462,18 @@ int NCR5380_abort(struct scsi_cmnd *cmd)
{
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = shost_priv(instance);
- struct scsi_cmnd *tmp, **prev;
unsigned long flags;
- scmd_printk(KERN_NOTICE, cmd, "aborting command\n");
-
spin_lock_irqsave(&hostdata->lock, flags);
+#if (NDEBUG & NDEBUG_ANY)
+ scmd_printk(KERN_INFO, cmd, "aborting command\n");
+#endif
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
- dprintk(NDEBUG_ABORT, "scsi%d: abort called basr 0x%02x, sr 0x%02x\n", HOSTNO,
- NCR5380_read(BUS_AND_STATUS_REG),
- NCR5380_read(STATUS_REG));
-
-#if 1
- /*
- * Case 1 : If the command is the currently executing command,
- * we'll set the aborted flag and return control so that
- * information transfer routine can exit cleanly.
- */
-
- if (hostdata->connected == cmd) {
-
- dprintk(NDEBUG_ABORT, "scsi%d: aborting connected command\n", HOSTNO);
- /*
- * We should perform BSY checking, and make sure we haven't slipped
- * into BUS FREE.
- */
-
- /* NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_ATN); */
- /*
- * Since we can't change phases until we've completed the current
- * handshake, we have to source or sink a byte of data if the current
- * phase is not MSGOUT.
- */
-
- /*
- * Return control to the executing NCR drive so we can clear the
- * aborted flag and get back into our main loop.
- */
-
- if (do_abort(instance) == 0) {
- hostdata->connected = NULL;
- cmd->result = DID_ABORT << 16;
-#ifdef SUPPORT_TAGS
- cmd_free_tag(cmd);
-#else
- hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
-#endif
- maybe_release_dma_irq(instance);
- spin_unlock_irqrestore(&hostdata->lock, flags);
- cmd->scsi_done(cmd);
- return SUCCESS;
- } else {
- spin_unlock_irqrestore(&hostdata->lock, flags);
- printk("scsi%d: abort of connected command failed!\n", HOSTNO);
- return FAILED;
- }
- }
-#endif
-
- /*
- * Case 2 : If the command hasn't been issued yet, we simply remove it
- * from the issue queue.
- */
- for (prev = (struct scsi_cmnd **)&(hostdata->issue_queue),
- tmp = (struct scsi_cmnd *)hostdata->issue_queue;
- tmp; prev = NEXTADDR(tmp), tmp = NEXT(tmp)) {
- if (cmd == tmp) {
- (*prev) = NEXT(tmp);
- SET_NEXT(tmp, NULL);
- tmp->result = DID_ABORT << 16;
- maybe_release_dma_irq(instance);
- spin_unlock_irqrestore(&hostdata->lock, flags);
- dprintk(NDEBUG_ABORT, "scsi%d: abort removed command from issue queue.\n",
- HOSTNO);
- /* Tagged queuing note: no tag to free here, hasn't been assigned
- * yet... */
- tmp->scsi_done(tmp);
- return SUCCESS;
- }
- }
-
- /*
- * Case 3 : If any commands are connected, we're going to fail the abort
- * and let the high level SCSI driver retry at a later time or
- * issue a reset.
- *
- * Timeouts, and therefore aborted commands, will be highly unlikely
- * and handling them cleanly in this situation would make the common
- * case of noresets less efficient, and would pollute our code. So,
- * we fail.
- */
-
- if (hostdata->connected) {
- spin_unlock_irqrestore(&hostdata->lock, flags);
- dprintk(NDEBUG_ABORT, "scsi%d: abort failed, command connected.\n", HOSTNO);
- return FAILED;
- }
-
- /*
- * Case 4: If the command is currently disconnected from the bus, and
- * there are no connected commands, we reconnect the I_T_L or
- * I_T_L_Q nexus associated with it, go into message out, and send
- * an abort message.
- *
- * This case is especially ugly. In order to reestablish the nexus, we
- * need to call NCR5380_select(). The easiest way to implement this
- * function was to abort if the bus was busy, and let the interrupt
- * handler triggered on the SEL for reselect take care of lost arbitrations
- * where necessary, meaning interrupts need to be enabled.
- *
- * When interrupts are enabled, the queues may change - so we
- * can't remove it from the disconnected queue before selecting it
- * because that could cause a failure in hashing the nexus if that
- * device reselected.
- *
- * Since the queues may change, we can't use the pointers from when we
- * first locate it.
- *
- * So, we must first locate the command, and if NCR5380_select()
- * succeeds, then issue the abort, relocate the command and remove
- * it from the disconnected queue.
- */
-
- for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp;
- tmp = NEXT(tmp)) {
- if (cmd == tmp) {
- dprintk(NDEBUG_ABORT, "scsi%d: aborting disconnected command.\n", HOSTNO);
-
- if (NCR5380_select(instance, cmd)) {
- spin_unlock_irq(&hostdata->lock);
- return FAILED;
- }
- dprintk(NDEBUG_ABORT, "scsi%d: nexus reestablished.\n", HOSTNO);
-
- do_abort(instance);
-
- for (prev = (struct scsi_cmnd **)&(hostdata->disconnected_queue),
- tmp = (struct scsi_cmnd *)hostdata->disconnected_queue;
- tmp; prev = NEXTADDR(tmp), tmp = NEXT(tmp)) {
- if (cmd == tmp) {
- *prev = NEXT(tmp);
- SET_NEXT(tmp, NULL);
- tmp->result = DID_ABORT << 16;
- /* We must unlock the tag/LUN immediately here, since the
- * target goes to BUS FREE and doesn't send us another
- * message (COMMAND_COMPLETE or the like)
- */
-#ifdef SUPPORT_TAGS
- cmd_free_tag(tmp);
-#else
- hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
-#endif
- maybe_release_dma_irq(instance);
- spin_unlock_irqrestore(&hostdata->lock, flags);
- tmp->scsi_done(tmp);
- return SUCCESS;
- }
- }
- }
- }
-
- /* Maybe it is sufficient just to release the ST-DMA lock... (if
- * possible at all) At least, we should check if the lock could be
- * released after the abort, in case it is kept due to some bug.
- */
- maybe_release_dma_irq(instance);
spin_unlock_irqrestore(&hostdata->lock, flags);
- /*
- * Case 5 : If we reached this point, the command was not found in any of
- * the queues.
- *
- * We probably reached this point because of an unlikely race condition
- * between the command completing successfully and the abortion code,
- * so we won't panic, but we will notify the user in case something really
- * broke.
- */
-
- printk(KERN_INFO "scsi%d: warning : SCSI command probably completed successfully before abortion\n", HOSTNO);
-
return FAILED;
}
@@ -2710,16 +2513,18 @@ static int NCR5380_bus_reset(struct scsi
* commands!
*/
- if (hostdata->issue_queue)
- dsprintk(NDEBUG_ABORT, instance, "reset aborted issued command(s)\n");
if (hostdata->connected)
dsprintk(NDEBUG_ABORT, instance, "reset aborted a connected command\n");
- if (hostdata->disconnected_queue)
- dsprintk(NDEBUG_ABORT, instance, "reset aborted disconnected command(s)\n");
-
- hostdata->issue_queue = NULL;
hostdata->connected = NULL;
- hostdata->disconnected_queue = NULL;
+
+ if (!list_empty(&hostdata->unissued))
+ dsprintk(NDEBUG_ABORT, instance, "reset aborted unissued list\n");
+ INIT_LIST_HEAD(&hostdata->unissued);
+
+ if (!list_empty(&hostdata->disconnected))
+ dsprintk(NDEBUG_ABORT, instance, "reset aborted disconnected list\n");
+ INIT_LIST_HEAD(&hostdata->disconnected);
+
#ifdef SUPPORT_TAGS
free_all_tags(hostdata);
#endif
Index: linux/drivers/scsi/NCR5380.h
===================================================================
--- linux.orig/drivers/scsi/NCR5380.h 2016-01-03 16:04:19.000000000 +1100
+++ linux/drivers/scsi/NCR5380.h 2016-01-03 16:04:20.000000000 +1100
@@ -24,6 +24,7 @@
#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/list.h>
#include <linux/workqueue.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_eh.h>
@@ -254,8 +255,8 @@ struct NCR5380_hostdata {
#endif
unsigned char last_message; /* last message OUT */
struct scsi_cmnd *connected; /* currently connected cmnd */
- struct scsi_cmnd *issue_queue; /* waiting to be issued */
- struct scsi_cmnd *disconnected_queue; /* waiting for reconnect */
+ struct list_head unissued; /* waiting to be issued */
+ struct list_head disconnected; /* waiting for reconnect */
spinlock_t lock; /* protects this struct */
int flags;
struct scsi_eh_save ses;
@@ -277,6 +278,17 @@ struct NCR5380_hostdata {
#ifdef __KERNEL__
+struct NCR5380_cmd {
+ struct list_head list;
+};
+
+#define NCR5380_CMD_SIZE (sizeof(struct NCR5380_cmd))
+
+static inline struct scsi_cmnd *NCR5380_to_scmd(struct NCR5380_cmd *ncmd_ptr)
+{
+ return ((struct scsi_cmnd *)ncmd_ptr) - 1;
+}
+
#ifndef NDEBUG
#define NDEBUG (0)
#endif
Index: linux/drivers/scsi/arm/cumana_1.c
===================================================================
--- linux.orig/drivers/scsi/arm/cumana_1.c 2016-01-03 16:04:00.000000000 +1100
+++ linux/drivers/scsi/arm/cumana_1.c 2016-01-03 16:04:20.000000000 +1100
@@ -208,6 +208,7 @@ static struct scsi_host_template cumanas
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "CumanaSCSI-1",
+ .cmd_size = NCR5380_CMD_SIZE,
};
static int cumanascsi1_probe(struct expansion_card *ec,
Index: linux/drivers/scsi/arm/oak.c
===================================================================
--- linux.orig/drivers/scsi/arm/oak.c 2016-01-03 16:04:12.000000000 +1100
+++ linux/drivers/scsi/arm/oak.c 2016-01-03 16:04:20.000000000 +1100
@@ -114,6 +114,7 @@ static struct scsi_host_template oakscsi
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "oakscsi",
+ .cmd_size = NCR5380_CMD_SIZE,
};
static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
Index: linux/drivers/scsi/atari_scsi.c
===================================================================
--- linux.orig/drivers/scsi/atari_scsi.c 2016-01-03 16:04:12.000000000 +1100
+++ linux/drivers/scsi/atari_scsi.c 2016-01-03 16:04:20.000000000 +1100
@@ -780,6 +780,7 @@ static struct scsi_host_template atari_s
.eh_bus_reset_handler = atari_scsi_bus_reset,
.this_id = 7,
.use_clustering = DISABLE_CLUSTERING,
+ .cmd_size = NCR5380_CMD_SIZE,
};
static int __init atari_scsi_probe(struct platform_device *pdev)
Index: linux/drivers/scsi/dmx3191d.c
===================================================================
--- linux.orig/drivers/scsi/dmx3191d.c 2016-01-03 16:04:08.000000000 +1100
+++ linux/drivers/scsi/dmx3191d.c 2016-01-03 16:04:20.000000000 +1100
@@ -61,6 +61,7 @@ static struct scsi_host_template dmx3191
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
+ .cmd_size = NCR5380_CMD_SIZE,
};
static int dmx3191d_probe_one(struct pci_dev *pdev,
Index: linux/drivers/scsi/dtc.c
===================================================================
--- linux.orig/drivers/scsi/dtc.c 2016-01-03 16:04:03.000000000 +1100
+++ linux/drivers/scsi/dtc.c 2016-01-03 16:04:20.000000000 +1100
@@ -452,5 +452,6 @@ static struct scsi_host_template driver_
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
+ .cmd_size = NCR5380_CMD_SIZE,
};
#include "scsi_module.c"
Index: linux/drivers/scsi/g_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/g_NCR5380.c 2016-01-03 16:04:12.000000000 +1100
+++ linux/drivers/scsi/g_NCR5380.c 2016-01-03 16:04:20.000000000 +1100
@@ -728,6 +728,7 @@ static struct scsi_host_template driver_
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
+ .cmd_size = NCR5380_CMD_SIZE,
};
#include "scsi_module.c"
Index: linux/drivers/scsi/mac_scsi.c
===================================================================
--- linux.orig/drivers/scsi/mac_scsi.c 2016-01-03 16:04:03.000000000 +1100
+++ linux/drivers/scsi/mac_scsi.c 2016-01-03 16:04:20.000000000 +1100
@@ -323,6 +323,7 @@ static struct scsi_host_template mac_scs
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
+ .cmd_size = NCR5380_CMD_SIZE,
};
static int __init mac_scsi_probe(struct platform_device *pdev)
Index: linux/drivers/scsi/pas16.c
===================================================================
--- linux.orig/drivers/scsi/pas16.c 2016-01-03 16:04:03.000000000 +1100
+++ linux/drivers/scsi/pas16.c 2016-01-03 16:04:20.000000000 +1100
@@ -562,6 +562,7 @@ static struct scsi_host_template driver_
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
+ .cmd_size = NCR5380_CMD_SIZE,
};
#include "scsi_module.c"
Index: linux/drivers/scsi/sun3_scsi.c
===================================================================
--- linux.orig/drivers/scsi/sun3_scsi.c 2016-01-03 16:04:12.000000000 +1100
+++ linux/drivers/scsi/sun3_scsi.c 2016-01-03 16:04:20.000000000 +1100
@@ -468,6 +468,7 @@ static struct scsi_host_template sun3_sc
.sg_tablesize = SG_NONE,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
+ .cmd_size = NCR5380_CMD_SIZE,
};
static int __init sun3_scsi_probe(struct platform_device *pdev)
Index: linux/drivers/scsi/t128.c
===================================================================
--- linux.orig/drivers/scsi/t128.c 2016-01-03 16:04:03.000000000 +1100
+++ linux/drivers/scsi/t128.c 2016-01-03 16:04:20.000000000 +1100
@@ -406,5 +406,6 @@ static struct scsi_host_template driver_
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
+ .cmd_size = NCR5380_CMD_SIZE,
};
#include "scsi_module.c"
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 42/78] ncr5380: Replace READ_OVERRUNS macro with FLAG_NO_DMA_FIXUPS |
| Message-ID | <qMJoU-1cG-57@gated-at.bofh.it> |
| In reply to | #1300181 |
The workarounds for chip errata appear twice, in slightly different
forms. One is used when defined(REAL_DMA) || defined(REAL_DMA_POLL), the
other when defined(PSEUDO_DMA). In the PDMA case, the workarounds have
been made conditional on FLAG_NO_DMA_FIXUPS. Do the same for the DMA case,
to eliminate the READ_OVERRUNS macro.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
---
drivers/scsi/NCR5380.c | 28 +++++++++++-----------------
1 file changed, 11 insertions(+), 17 deletions(-)
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2016-01-03 16:03:54.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2016-01-03 16:03:56.000000000 +1100
@@ -94,11 +94,6 @@
#undef REAL_DMA
#endif
-#ifdef REAL_DMA_POLL
-#undef READ_OVERRUNS
-#define READ_OVERRUNS
-#endif
-
#ifdef BOARD_REQUIRES_NO_DELAY
#define io_recovery_delay(x)
#else
@@ -1586,11 +1581,10 @@ static int NCR5380_transfer_dma(struct S
return -1;
}
#if defined(REAL_DMA) || defined(REAL_DMA_POLL)
-#ifdef READ_OVERRUNS
if (p & SR_IO) {
- c -= 2;
+ if (!(hostdata->flags & FLAG_NO_DMA_FIXUPS))
+ c -= 2;
}
-#endif
dprintk(NDEBUG_DMA, "scsi%d : initializing DMA channel %d for %s, %d bytes %s %0x\n", instance->host_no, instance->dma_channel, (p & SR_IO) ? "reading" : "writing", c, (p & SR_IO) ? "to" : "from", (unsigned) d);
hostdata->dma_len = (p & SR_IO) ? NCR5380_dma_read_setup(instance, d, c) : NCR5380_dma_write_setup(instance, d, c);
#endif
@@ -1676,13 +1670,14 @@ static int NCR5380_transfer_dma(struct S
*/
if (p & SR_IO) {
-#ifdef READ_OVERRUNS
- udelay(10);
- if (((NCR5380_read(BUS_AND_STATUS_REG) & (BASR_PHASE_MATCH | BASR_ACK)) == (BASR_PHASE_MATCH | BASR_ACK))) {
- saved_data = NCR5380_read(INPUT_DATA_REGISTER);
- overrun = 1;
+ if (!(hostdata->flags & FLAG_NO_DMA_FIXUPS)) {
+ udelay(10);
+ if ((NCR5380_read(BUS_AND_STATUS_REG) & (BASR_PHASE_MATCH | BASR_ACK)) ==
+ (BASR_PHASE_MATCH | BASR_ACK)) {
+ saved_data = NCR5380_read(INPUT_DATA_REGISTER);
+ overrun = 1;
+ }
}
-#endif
} else {
int limit = 100;
while (((tmp = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_ACK) || (NCR5380_read(STATUS_REG) & SR_REQ)) {
@@ -1704,8 +1699,8 @@ static int NCR5380_transfer_dma(struct S
*data += c;
*phase = NCR5380_read(STATUS_REG) & PHASE_MASK;
-#ifdef READ_OVERRUNS
- if (*phase == p && (p & SR_IO) && residue == 0) {
+ if (!(hostdata->flags & FLAG_NO_DMA_FIXUPS) &&
+ *phase == p && (p & SR_IO) && residue == 0) {
if (overrun) {
dprintk(NDEBUG_DMA, "Got an input overrun, using saved byte\n");
**data = saved_data;
@@ -1720,7 +1715,6 @@ static int NCR5380_transfer_dma(struct S
NCR5380_transfer_pio(instance, phase, &cnt, data);
*count -= toPIO - cnt;
}
-#endif
dprintk(NDEBUG_DMA, "Return with data ptr = 0x%X, count %d, last 0x%X, next 0x%X\n", *data, *count, *(*data + *count - 1), *(*data + *count));
return 0;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 56/78] ncr5380: Remove redundant volatile qualifiers |
| Message-ID | <qMJoU-1cG-65@gated-at.bofh.it> |
| In reply to | #1300181 |
The hostdata struct is now protected by a spin lock so the volatile
qualifiers are redundant. Remove them.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
drivers/scsi/NCR5380.h | 12 ++++++------
drivers/scsi/atari_NCR5380.c | 2 +-
2 files changed, 7 insertions(+), 7 deletions(-)
Index: linux/drivers/scsi/NCR5380.h
===================================================================
--- linux.orig/drivers/scsi/NCR5380.h 2016-01-03 16:04:14.000000000 +1100
+++ linux/drivers/scsi/NCR5380.h 2016-01-03 16:04:19.000000000 +1100
@@ -248,14 +248,14 @@ struct NCR5380_hostdata {
NCR5380_implementation_fields; /* implementation specific */
struct Scsi_Host *host; /* Host backpointer */
unsigned char id_mask, id_higher_mask; /* 1 << id, all bits greater */
- volatile unsigned char busy[8]; /* index = target, bit = lun */
+ unsigned char busy[8]; /* index = target, bit = lun */
#if defined(REAL_DMA) || defined(REAL_DMA_POLL)
- volatile int dma_len; /* requested length of DMA */
+ int dma_len; /* requested length of DMA */
#endif
- volatile unsigned char last_message; /* last message OUT */
- volatile struct scsi_cmnd *connected; /* currently connected command */
- volatile struct scsi_cmnd *issue_queue; /* waiting to be issued */
- volatile struct scsi_cmnd *disconnected_queue; /* waiting for reconnect */
+ unsigned char last_message; /* last message OUT */
+ struct scsi_cmnd *connected; /* currently connected cmnd */
+ struct scsi_cmnd *issue_queue; /* waiting to be issued */
+ struct scsi_cmnd *disconnected_queue; /* waiting for reconnect */
spinlock_t lock; /* protects this struct */
int flags;
struct scsi_eh_save ses;
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:18.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:19.000000000 +1100
@@ -1009,7 +1009,7 @@ static void NCR5380_dma_complete(struct
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int transferred;
unsigned char **data;
- volatile int *count;
+ int *count;
int saved_data = 0, overrun = 0;
unsigned char p;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 59/78] ncr5380: Fix autosense bugs |
| Message-ID | <qMJoT-1cG-37@gated-at.bofh.it> |
| In reply to | #1300181 |
NCR5380_information_transfer() may re-queue a command for autosense,
after calling scsi_eh_prep_cmnd(). This creates several possibilities:
1. Reselection may intervene before the re-queued command gets processed.
If the reconnected command then undergoes autosense, this causes the
scsi_eh_save data from the previous command to be overwritten.
2. After NCR5380_information_transfer() calls scsi_eh_prep_cmnd(),
a new REQUEST SENSE command may arrive. This would be queued ahead
of any command already undergoing autosense, which means the
scsi_eh_save data might be restored to the wrong command.
3. After NCR5380_information_transfer() calls scsi_eh_prep_cmnd(),
eh_abort_handler() may abort the command. But the scsi_eh_save data is
not discarded, which means the scsi_eh_save data might be incorrectly
restored to the next REQUEST SENSE command issued.
This patch adds a new autosense list so that commands that are re-queued
because of a CHECK CONDITION result can be kept apart from the REQUEST
SENSE commands that arrive via queuecommand.
This patch also adds a function dedicated to dequeueing and preparing the
next command for processing. By refactoring the main loop in this way,
scsi_eh_save takes place when an autosense command is dequeued rather
than when re-queued.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
drivers/scsi/NCR5380.c | 194 +++++++++++++++++++---------------
drivers/scsi/NCR5380.h | 2
drivers/scsi/atari_NCR5380.c | 239 ++++++++++++++++++++++++-------------------
3 files changed, 249 insertions(+), 186 deletions(-)
Index: linux/drivers/scsi/NCR5380.h
===================================================================
--- linux.orig/drivers/scsi/NCR5380.h 2016-01-03 16:04:20.000000000 +1100
+++ linux/drivers/scsi/NCR5380.h 2016-01-03 16:04:25.000000000 +1100
@@ -256,10 +256,12 @@ struct NCR5380_hostdata {
unsigned char last_message; /* last message OUT */
struct scsi_cmnd *connected; /* currently connected cmnd */
struct list_head unissued; /* waiting to be issued */
+ struct list_head autosense; /* priority issue queue */
struct list_head disconnected; /* waiting for reconnect */
spinlock_t lock; /* protects this struct */
int flags;
struct scsi_eh_save ses;
+ struct scsi_cmnd *sensing;
char info[256];
int read_overruns; /* number of bytes to cut from a
* transfer to handle chip overruns */
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:24.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:25.000000000 +1100
@@ -418,6 +418,9 @@ static inline void initialize_SCp(struct
cmd->SCp.ptr = NULL;
cmd->SCp.this_residual = 0;
}
+
+ cmd->SCp.Status = 0;
+ cmd->SCp.Message = 0;
}
/**
@@ -661,6 +664,8 @@ static int __init NCR5380_init(struct Sc
#endif
spin_lock_init(&hostdata->lock);
hostdata->connected = NULL;
+ hostdata->sensing = NULL;
+ INIT_LIST_HEAD(&hostdata->autosense);
INIT_LIST_HEAD(&hostdata->unissued);
INIT_LIST_HEAD(&hostdata->disconnected);
@@ -777,6 +782,16 @@ static void complete_cmd(struct Scsi_Hos
dsprintk(NDEBUG_QUEUES, instance, "complete_cmd: cmd %p\n", cmd);
+ if (hostdata->sensing == cmd) {
+ /* Autosense processing ends here */
+ if ((cmd->result & 0xff) != SAM_STAT_GOOD) {
+ scsi_eh_restore_cmnd(cmd, &hostdata->ses);
+ set_host_byte(cmd, DID_ERROR);
+ } else
+ scsi_eh_restore_cmnd(cmd, &hostdata->ses);
+ hostdata->sensing = NULL;
+ }
+
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
#else
@@ -868,12 +883,77 @@ static inline void maybe_release_dma_irq
/* Caller does the locking needed to set & test these data atomically */
if (list_empty(&hostdata->disconnected) &&
list_empty(&hostdata->unissued) &&
+ list_empty(&hostdata->autosense) &&
!hostdata->connected &&
!hostdata->retain_dma_intr)
NCR5380_release_dma_irq(instance);
}
/**
+ * dequeue_next_cmd - dequeue a command for processing
+ * @instance: the scsi host instance
+ *
+ * Priority is given to commands on the autosense queue. These commands
+ * need autosense because of a CHECK CONDITION result.
+ *
+ * Returns a command pointer if a command is found for a target that is
+ * not already busy. Otherwise returns NULL.
+ */
+
+static struct scsi_cmnd *dequeue_next_cmd(struct Scsi_Host *instance)
+{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+ struct NCR5380_cmd *ncmd;
+ struct scsi_cmnd *cmd;
+
+ if (list_empty(&hostdata->autosense)) {
+ list_for_each_entry(ncmd, &hostdata->unissued, list) {
+ cmd = NCR5380_to_scmd(ncmd);
+ dsprintk(NDEBUG_QUEUES, instance, "dequeue: cmd=%p target=%d busy=0x%02x lun=%llu\n",
+ cmd, scmd_id(cmd), hostdata->busy[scmd_id(cmd)], cmd->device->lun);
+
+ if (
+#ifdef SUPPORT_TAGS
+ !is_lun_busy(cmd, 1)
+#else
+ !(hostdata->busy[scmd_id(cmd)] & (1 << cmd->device->lun))
+#endif
+ ) {
+ list_del(&ncmd->list);
+ dsprintk(NDEBUG_QUEUES, instance,
+ "dequeue: removed %p from issue queue\n", cmd);
+ return cmd;
+ }
+ }
+ } else {
+ /* Autosense processing begins here */
+ ncmd = list_first_entry(&hostdata->autosense,
+ struct NCR5380_cmd, list);
+ list_del(&ncmd->list);
+ cmd = NCR5380_to_scmd(ncmd);
+ dsprintk(NDEBUG_QUEUES, instance,
+ "dequeue: removed %p from autosense queue\n", cmd);
+ scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
+ hostdata->sensing = cmd;
+ return cmd;
+ }
+ return NULL;
+}
+
+static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
+{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
+
+ if (hostdata->sensing) {
+ scsi_eh_restore_cmnd(cmd, &hostdata->ses);
+ list_add(&ncmd->list, &hostdata->autosense);
+ hostdata->sensing = NULL;
+ } else
+ list_add(&ncmd->list, &hostdata->unissued);
+}
+
+/**
* NCR5380_main - NCR state machines
*
* NCR5380_main is a coroutine that runs as long as more work can
@@ -889,7 +969,7 @@ static void NCR5380_main(struct work_str
struct NCR5380_hostdata *hostdata =
container_of(work, struct NCR5380_hostdata, main_task);
struct Scsi_Host *instance = hostdata->host;
- struct NCR5380_cmd *ncmd, *n;
+ struct scsi_cmnd *cmd;
int done;
/*
@@ -902,75 +982,46 @@ static void NCR5380_main(struct work_str
do {
done = 1;
- if (!hostdata->connected) {
- dprintk(NDEBUG_MAIN, "scsi%d: not connected\n", HOSTNO);
- /*
- * Search through the issue_queue for a command destined
- * for a target that's not busy.
- */
- list_for_each_entry_safe(ncmd, n, &hostdata->unissued,
- list) {
- struct scsi_cmnd *tmp = NCR5380_to_scmd(ncmd);
- u8 lun = tmp->device->lun;
-
- dsprintk(NDEBUG_QUEUES, instance, "main: tmp=%p target=%d busy=%d lun=%d\n",
- tmp, scmd_id(tmp), hostdata->busy[scmd_id(tmp)], lun);
- /* When we find one, remove it from the issue queue. */
- if (
-#ifdef SUPPORT_TAGS
- !is_lun_busy( tmp, tmp->cmnd[0] != REQUEST_SENSE)
-#else
- !(hostdata->busy[tmp->device->id] & (1 << lun))
-#endif
- ) {
- list_del(&ncmd->list);
- dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES,
- instance, "main: removed %p from issue queue\n",
- tmp);
+ while (!hostdata->connected &&
+ (cmd = dequeue_next_cmd(instance))) {
- hostdata->retain_dma_intr++;
+ dsprintk(NDEBUG_MAIN, instance, "main: dequeued %p\n", cmd);
- /*
- * Attempt to establish an I_T_L nexus here.
- * On success, instance->hostdata->connected is set.
- * On failure, we must add the command back to the
- * issue queue so we can keep trying.
- */
- /*
- * REQUEST SENSE commands are issued without tagged
- * queueing, even on SCSI-II devices because the
- * contingent allegiance condition exists for the
- * entire unit.
- */
- /* ++roman: ...and the standard also requires that
- * REQUEST SENSE command are untagged.
- */
+ /*
+ * Attempt to establish an I_T_L nexus here.
+ * On success, instance->hostdata->connected is set.
+ * On failure, we must add the command back to the
+ * issue queue so we can keep trying.
+ */
+ /*
+ * REQUEST SENSE commands are issued without tagged
+ * queueing, even on SCSI-II devices because the
+ * contingent allegiance condition exists for the
+ * entire unit.
+ */
+ /* ++roman: ...and the standard also requires that
+ * REQUEST SENSE command are untagged.
+ */
#ifdef SUPPORT_TAGS
- cmd_get_tag(tmp, tmp->cmnd[0] != REQUEST_SENSE);
+ cmd_get_tag(cmd, cmd->cmnd[0] != REQUEST_SENSE);
#endif
- if (!NCR5380_select(instance, tmp)) {
- /* OK or bad target */
- hostdata->retain_dma_intr--;
- maybe_release_dma_irq(instance);
- } else {
- /* Need to retry */
- list_add(&ncmd->list, &hostdata->unissued);
- dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES,
- instance, "main: select() failed, %p returned to issue queue\n",
- tmp);
+ hostdata->retain_dma_intr++;
+ if (!NCR5380_select(instance, cmd)) {
+ dsprintk(NDEBUG_MAIN, instance, "main: selected target %d for command %p\n",
+ scmd_id(cmd), cmd);
+ hostdata->retain_dma_intr--;
+ maybe_release_dma_irq(instance);
+ } else {
+ hostdata->retain_dma_intr--;
+ dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES, instance,
+ "main: select failed, returning %p to queue\n", cmd);
+ requeue_cmd(instance, cmd);
#ifdef SUPPORT_TAGS
- cmd_free_tag(tmp);
+ cmd_free_tag(cmd);
#endif
- hostdata->retain_dma_intr--;
- done = 0;
- }
- if (hostdata->connected)
- break;
- } /* if target/lun/target queue is not busy */
- } /* for issue_queue */
- } /* if (!hostdata->connected) */
-
+ }
+ }
if (hostdata->connected
#ifdef REAL_DMA
&& !hostdata->dma_len
@@ -2002,48 +2053,21 @@ static void NCR5380_information_transfer
}
#endif
- /*
- * I'm not sure what the correct thing to do here is :
- *
- * If the command that just executed is NOT a request
- * sense, the obvious thing to do is to set the result
- * code to the values of the stored parameters.
- *
- * If it was a REQUEST SENSE command, we need some way to
- * differentiate between the failure code of the original
- * and the failure code of the REQUEST sense - the obvious
- * case is success, where we fall through and leave the
- * result code unchanged.
- *
- * The non-obvious place is where the REQUEST SENSE failed
- */
+ cmd->result &= ~0xffff;
+ cmd->result |= cmd->SCp.Status;
+ cmd->result |= cmd->SCp.Message << 8;
- if (cmd->cmnd[0] != REQUEST_SENSE)
- cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
- else if (status_byte(cmd->SCp.Status) != GOOD)
- cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
-
- if ((cmd->cmnd[0] == REQUEST_SENSE) &&
- hostdata->ses.cmd_len) {
- scsi_eh_restore_cmnd(cmd, &hostdata->ses);
- hostdata->ses.cmd_len = 0 ;
- }
-
- if ((cmd->cmnd[0] != REQUEST_SENSE) &&
- (status_byte(cmd->SCp.Status) == CHECK_CONDITION)) {
- scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
-
- list_add(&ncmd->list, &hostdata->unissued);
- dsprintk(NDEBUG_AUTOSENSE | NDEBUG_QUEUES,
- instance, "REQUEST SENSE cmd %p added to head of issue queue\n",
- cmd);
-#ifdef SUPPORT_TAGS
- cmd_free_tag(cmd);
-#else
- hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
-#endif
- } else {
+ if (cmd->cmnd[0] == REQUEST_SENSE)
complete_cmd(instance, cmd);
+ else {
+ if (cmd->SCp.Status == SAM_STAT_CHECK_CONDITION ||
+ cmd->SCp.Status == SAM_STAT_COMMAND_TERMINATED) {
+ dsprintk(NDEBUG_QUEUES, instance, "autosense: adding cmd %p to tail of autosense queue\n",
+ cmd);
+ list_add_tail(&ncmd->list,
+ &hostdata->autosense);
+ } else
+ complete_cmd(instance, cmd);
}
/*
@@ -2533,6 +2557,15 @@ static int NCR5380_bus_reset(struct scsi
dsprintk(NDEBUG_ABORT, instance, "reset aborted a connected command\n");
hostdata->connected = NULL;
+ if (hostdata->sensing) {
+ complete_cmd(instance, hostdata->sensing);
+ hostdata->sensing = NULL;
+ }
+
+ if (!list_empty(&hostdata->autosense))
+ dsprintk(NDEBUG_ABORT, instance, "reset aborted autosense list\n");
+ INIT_LIST_HEAD(&hostdata->autosense);
+
if (!list_empty(&hostdata->unissued))
dsprintk(NDEBUG_ABORT, instance, "reset aborted unissued list\n");
INIT_LIST_HEAD(&hostdata->unissued);
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2016-01-03 16:04:24.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2016-01-03 16:04:25.000000000 +1100
@@ -244,6 +244,9 @@ static inline void initialize_SCp(struct
cmd->SCp.ptr = NULL;
cmd->SCp.this_residual = 0;
}
+
+ cmd->SCp.Status = 0;
+ cmd->SCp.Message = 0;
}
/**
@@ -622,6 +625,8 @@ static int NCR5380_init(struct Scsi_Host
#endif
spin_lock_init(&hostdata->lock);
hostdata->connected = NULL;
+ hostdata->sensing = NULL;
+ INIT_LIST_HEAD(&hostdata->autosense);
INIT_LIST_HEAD(&hostdata->unissued);
INIT_LIST_HEAD(&hostdata->disconnected);
@@ -738,6 +743,16 @@ static void complete_cmd(struct Scsi_Hos
dsprintk(NDEBUG_QUEUES, instance, "complete_cmd: cmd %p\n", cmd);
+ if (hostdata->sensing == cmd) {
+ /* Autosense processing ends here */
+ if ((cmd->result & 0xff) != SAM_STAT_GOOD) {
+ scsi_eh_restore_cmnd(cmd, &hostdata->ses);
+ set_host_byte(cmd, DID_ERROR);
+ } else
+ scsi_eh_restore_cmnd(cmd, &hostdata->ses);
+ hostdata->sensing = NULL;
+ }
+
hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun);
cmd->scsi_done(cmd);
@@ -798,6 +813,64 @@ static int NCR5380_queue_command(struct
}
/**
+ * dequeue_next_cmd - dequeue a command for processing
+ * @instance: the scsi host instance
+ *
+ * Priority is given to commands on the autosense queue. These commands
+ * need autosense because of a CHECK CONDITION result.
+ *
+ * Returns a command pointer if a command is found for a target that is
+ * not already busy. Otherwise returns NULL.
+ */
+
+static struct scsi_cmnd *dequeue_next_cmd(struct Scsi_Host *instance)
+{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+ struct NCR5380_cmd *ncmd;
+ struct scsi_cmnd *cmd;
+
+ if (list_empty(&hostdata->autosense)) {
+ list_for_each_entry(ncmd, &hostdata->unissued, list) {
+ cmd = NCR5380_to_scmd(ncmd);
+ dsprintk(NDEBUG_QUEUES, instance, "dequeue: cmd=%p target=%d busy=0x%02x lun=%llu\n",
+ cmd, scmd_id(cmd), hostdata->busy[scmd_id(cmd)], cmd->device->lun);
+
+ if (!(hostdata->busy[scmd_id(cmd)] & (1 << cmd->device->lun))) {
+ list_del(&ncmd->list);
+ dsprintk(NDEBUG_QUEUES, instance,
+ "dequeue: removed %p from issue queue\n", cmd);
+ return cmd;
+ }
+ }
+ } else {
+ /* Autosense processing begins here */
+ ncmd = list_first_entry(&hostdata->autosense,
+ struct NCR5380_cmd, list);
+ list_del(&ncmd->list);
+ cmd = NCR5380_to_scmd(ncmd);
+ dsprintk(NDEBUG_QUEUES, instance,
+ "dequeue: removed %p from autosense queue\n", cmd);
+ scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
+ hostdata->sensing = cmd;
+ return cmd;
+ }
+ return NULL;
+}
+
+static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
+{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+ struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd);
+
+ if (hostdata->sensing) {
+ scsi_eh_restore_cmnd(cmd, &hostdata->ses);
+ list_add(&ncmd->list, &hostdata->autosense);
+ hostdata->sensing = NULL;
+ } else
+ list_add(&ncmd->list, &hostdata->unissued);
+}
+
+/**
* NCR5380_main - NCR state machines
*
* NCR5380_main is a coroutine that runs as long as more work can
@@ -814,63 +887,40 @@ static void NCR5380_main(struct work_str
struct NCR5380_hostdata *hostdata =
container_of(work, struct NCR5380_hostdata, main_task);
struct Scsi_Host *instance = hostdata->host;
- struct NCR5380_cmd *ncmd, *n;
+ struct scsi_cmnd *cmd;
int done;
spin_lock_irq(&hostdata->lock);
do {
done = 1;
- if (!hostdata->connected) {
- dprintk(NDEBUG_MAIN, "scsi%d : not connected\n", instance->host_no);
+ while (!hostdata->connected &&
+ (cmd = dequeue_next_cmd(instance))) {
+
+ dsprintk(NDEBUG_MAIN, instance, "main: dequeued %p\n", cmd);
+
/*
- * Search through the issue_queue for a command destined
- * for a target that's not busy.
+ * Attempt to establish an I_T_L nexus here.
+ * On success, instance->hostdata->connected is set.
+ * On failure, we must add the command back to the
+ * issue queue so we can keep trying.
+ */
+ /*
+ * REQUEST SENSE commands are issued without tagged
+ * queueing, even on SCSI-II devices because the
+ * contingent allegiance condition exists for the
+ * entire unit.
*/
- list_for_each_entry_safe(ncmd, n, &hostdata->unissued,
- list) {
- struct scsi_cmnd *tmp = NCR5380_to_scmd(ncmd);
-
- dsprintk(NDEBUG_QUEUES, instance, "main: tmp=%p target=%d busy=%d lun=%llu\n",
- tmp, scmd_id(tmp), hostdata->busy[scmd_id(tmp)],
- tmp->device->lun);
- /* When we find one, remove it from the issue queue. */
- if (!(hostdata->busy[tmp->device->id] &
- (1 << (u8)(tmp->device->lun & 0xff)))) {
- list_del(&ncmd->list);
- dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES,
- instance, "main: removed %p from issue queue\n",
- tmp);
-
- /*
- * Attempt to establish an I_T_L nexus here.
- * On success, instance->hostdata->connected is set.
- * On failure, we must add the command back to the
- * issue queue so we can keep trying.
- */
- /*
- * REQUEST SENSE commands are issued without tagged
- * queueing, even on SCSI-II devices because the
- * contingent allegiance condition exists for the
- * entire unit.
- */
-
- if (!NCR5380_select(instance, tmp)) {
- /* OK or bad target */
- } else {
- /* Need to retry */
- list_add(&ncmd->list, &hostdata->unissued);
- dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES,
- instance, "main: select() failed, %p returned to issue queue\n",
- tmp);
- done = 0;
- }
- if (hostdata->connected)
- break;
- } /* if target/lun is not busy */
- } /* for */
- } /* if (!hostdata->connected) */
+ if (!NCR5380_select(instance, cmd)) {
+ dsprintk(NDEBUG_MAIN, instance, "main: selected target %d for command %p\n",
+ scmd_id(cmd), cmd);
+ } else {
+ dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES, instance,
+ "main: select failed, returning %p to queue\n", cmd);
+ requeue_cmd(instance, cmd);
+ }
+ }
if (hostdata->connected
#ifdef REAL_DMA
&& !hostdata->dmalen
@@ -1853,43 +1903,21 @@ static void NCR5380_information_transfer
hostdata->connected = NULL;
- /*
- * I'm not sure what the correct thing to do here is :
- *
- * If the command that just executed is NOT a request
- * sense, the obvious thing to do is to set the result
- * code to the values of the stored parameters.
- *
- * If it was a REQUEST SENSE command, we need some way
- * to differentiate between the failure code of the original
- * and the failure code of the REQUEST sense - the obvious
- * case is success, where we fall through and leave the result
- * code unchanged.
- *
- * The non-obvious place is where the REQUEST SENSE failed
- */
-
- if (cmd->cmnd[0] != REQUEST_SENSE)
- cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
- else if (status_byte(cmd->SCp.Status) != GOOD)
- cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
-
- if ((cmd->cmnd[0] == REQUEST_SENSE) &&
- hostdata->ses.cmd_len) {
- scsi_eh_restore_cmnd(cmd, &hostdata->ses);
- hostdata->ses.cmd_len = 0 ;
- }
-
- if ((cmd->cmnd[0] != REQUEST_SENSE) && (status_byte(cmd->SCp.Status) == CHECK_CONDITION)) {
- scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
+ cmd->result &= ~0xffff;
+ cmd->result |= cmd->SCp.Status;
+ cmd->result |= cmd->SCp.Message << 8;
- list_add(&ncmd->list, &hostdata->unissued);
- dsprintk(NDEBUG_AUTOSENSE | NDEBUG_QUEUES,
- instance, "REQUEST SENSE cmd %p added to head of issue queue\n",
- cmd);
- hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xFF));
- } else {
+ if (cmd->cmnd[0] == REQUEST_SENSE)
complete_cmd(instance, cmd);
+ else {
+ if (cmd->SCp.Status == SAM_STAT_CHECK_CONDITION ||
+ cmd->SCp.Status == SAM_STAT_COMMAND_TERMINATED) {
+ dsprintk(NDEBUG_QUEUES, instance, "autosense: adding cmd %p to tail of autosense queue\n",
+ cmd);
+ list_add_tail(&ncmd->list,
+ &hostdata->autosense);
+ } else
+ complete_cmd(instance, cmd);
}
/*
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 45/78] ncr5380: Cleanup #include directives |
| Message-ID | <qMJoU-1cG-61@gated-at.bofh.it> |
| In reply to | #1300181 |
Remove unused includes (stat.h, signal.h, proc_fs.h) and move includes
needed by the core drivers into the common header (delay.h etc).
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
drivers/scsi/NCR5380.c | 2 --
drivers/scsi/NCR5380.h | 4 ++++
drivers/scsi/arm/cumana_1.c | 4 ----
drivers/scsi/arm/oak.c | 2 --
drivers/scsi/atari_NCR5380.c | 5 -----
drivers/scsi/atari_scsi.c | 1 -
drivers/scsi/dmx3191d.c | 5 -----
drivers/scsi/dtc.c | 4 +---
drivers/scsi/g_NCR5380.c | 6 ++----
drivers/scsi/mac_scsi.c | 1 -
drivers/scsi/pas16.c | 4 ----
drivers/scsi/t128.c | 3 ---
12 files changed, 7 insertions(+), 34 deletions(-)
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2016-01-03 16:03:59.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2016-01-03 16:04:00.000000000 +1100
@@ -79,8 +79,6 @@
* 4. Test SCSI-II tagged queueing (I have no devices which support
* tagged queueing)
*/
-#include <scsi/scsi_dbg.h>
-#include <scsi/scsi_transport_spi.h>
#if (NDEBUG & NDEBUG_LISTS)
#define LIST(x,y) {printk("LINE:%d Adding %p to %p\n", __LINE__, (void*)(x), (void*)(y)); if ((x)==(y)) udelay(5); }
Index: linux/drivers/scsi/NCR5380.h
===================================================================
--- linux.orig/drivers/scsi/NCR5380.h 2016-01-03 16:03:54.000000000 +1100
+++ linux/drivers/scsi/NCR5380.h 2016-01-03 16:04:00.000000000 +1100
@@ -22,8 +22,12 @@
#ifndef NCR5380_H
#define NCR5380_H
+#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <scsi/scsi_dbg.h>
#include <scsi/scsi_eh.h>
+#include <scsi/scsi_transport_spi.h>
#define NDEBUG_ARBITRATION 0x1
#define NDEBUG_AUTOSENSE 0x2
Index: linux/drivers/scsi/arm/cumana_1.c
===================================================================
--- linux.orig/drivers/scsi/arm/cumana_1.c 2016-01-03 16:03:31.000000000 +1100
+++ linux/drivers/scsi/arm/cumana_1.c 2016-01-03 16:04:00.000000000 +1100
@@ -4,9 +4,7 @@
* Copyright 1995-2002, Russell King
*/
#include <linux/module.h>
-#include <linux/signal.h>
#include <linux/ioport.h>
-#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/init.h>
@@ -15,8 +13,6 @@
#include <scsi/scsi_host.h>
-#include <scsi/scsicam.h>
-
#define PSEUDO_DMA
#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
Index: linux/drivers/scsi/arm/oak.c
===================================================================
--- linux.orig/drivers/scsi/arm/oak.c 2016-01-03 16:03:31.000000000 +1100
+++ linux/drivers/scsi/arm/oak.c 2016-01-03 16:04:00.000000000 +1100
@@ -5,9 +5,7 @@
*/
#include <linux/module.h>
-#include <linux/signal.h>
#include <linux/ioport.h>
-#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/init.h>
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:03:59.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:00.000000000 +1100
@@ -68,9 +68,6 @@
/* Adapted for the sun3 by Sam Creasey. */
-#include <scsi/scsi_dbg.h>
-#include <scsi/scsi_transport_spi.h>
-
#if (NDEBUG & NDEBUG_LISTS)
#define LIST(x, y) \
do { \
@@ -517,8 +514,6 @@ static inline int NCR5380_poll_politely(
reg, bit, val, wait);
}
-#include <linux/delay.h>
-
#if NDEBUG
static struct {
unsigned char mask;
Index: linux/drivers/scsi/atari_scsi.c
===================================================================
--- linux.orig/drivers/scsi/atari_scsi.c 2016-01-03 16:03:23.000000000 +1100
+++ linux/drivers/scsi/atari_scsi.c 2016-01-03 16:04:00.000000000 +1100
@@ -66,7 +66,6 @@
#include <linux/module.h>
#include <linux/types.h>
-#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/init.h>
Index: linux/drivers/scsi/dmx3191d.c
===================================================================
--- linux.orig/drivers/scsi/dmx3191d.c 2016-01-03 16:03:23.000000000 +1100
+++ linux/drivers/scsi/dmx3191d.c 2016-01-03 16:04:00.000000000 +1100
@@ -41,11 +41,6 @@
#define NCR5380_implementation_fields /* none */
-/*
- * Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h)
- */
-#include <linux/delay.h>
-
#include "NCR5380.h"
#include "NCR5380.c"
Index: linux/drivers/scsi/dtc.c
===================================================================
--- linux.orig/drivers/scsi/dtc.c 2016-01-03 16:03:54.000000000 +1100
+++ linux/drivers/scsi/dtc.c 2016-01-03 16:04:00.000000000 +1100
@@ -46,15 +46,13 @@
#include <linux/module.h>
-#include <linux/signal.h>
#include <linux/blkdev.h>
-#include <linux/delay.h>
-#include <linux/stat.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <scsi/scsi_host.h>
+
#include "dtc.h"
#define AUTOPROBE_IRQ
#include "NCR5380.h"
Index: linux/drivers/scsi/g_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/g_NCR5380.c 2016-01-03 16:03:54.000000000 +1100
+++ linux/drivers/scsi/g_NCR5380.c 2016-01-03 16:04:00.000000000 +1100
@@ -63,16 +63,14 @@
#endif
#include <asm/io.h>
-#include <linux/signal.h>
#include <linux/blkdev.h>
+#include <linux/module.h>
#include <scsi/scsi_host.h>
#include "g_NCR5380.h"
#include "NCR5380.h"
-#include <linux/stat.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/isapnp.h>
-#include <linux/delay.h>
#include <linux/interrupt.h>
static int ncr_irq;
@@ -732,7 +730,7 @@ static struct scsi_host_template driver_
.cmd_per_lun = CMD_PER_LUN,
.use_clustering = DISABLE_CLUSTERING,
};
-#include <linux/module.h>
+
#include "scsi_module.c"
module_param(ncr_irq, int, 0);
Index: linux/drivers/scsi/mac_scsi.c
===================================================================
--- linux.orig/drivers/scsi/mac_scsi.c 2016-01-03 16:03:31.000000000 +1100
+++ linux/drivers/scsi/mac_scsi.c 2016-01-03 16:04:00.000000000 +1100
@@ -12,7 +12,6 @@
*/
#include <linux/types.h>
-#include <linux/delay.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
Index: linux/drivers/scsi/pas16.c
===================================================================
--- linux.orig/drivers/scsi/pas16.c 2016-01-03 16:03:49.000000000 +1100
+++ linux/drivers/scsi/pas16.c 2016-01-03 16:04:00.000000000 +1100
@@ -69,14 +69,10 @@
#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/proc_fs.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/blkdev.h>
-#include <linux/delay.h>
#include <linux/interrupt.h>
-#include <linux/stat.h>
#include <linux/init.h>
#include <scsi/scsi_host.h>
Index: linux/drivers/scsi/t128.c
===================================================================
--- linux.orig/drivers/scsi/t128.c 2016-01-03 16:03:23.000000000 +1100
+++ linux/drivers/scsi/t128.c 2016-01-03 16:04:00.000000000 +1100
@@ -68,14 +68,11 @@
* 15 9-11
*/
-#include <linux/signal.h>
#include <linux/io.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
-#include <linux/stat.h>
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/delay.h>
#include <scsi/scsi_host.h>
#include "t128.h"
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 75/78] ncr5380: Enable PDMA for NCR53C400A |
| Message-ID | <qMJoV-1cG-71@gated-at.bofh.it> |
| In reply to | #1300181 |
From: Ondrej Zary <linux@rainbow-software.org>
Add I/O register mapping for NCR53C400A and enable PDMA mode to
improve performance and fix non-working IRQ.
Tested with HP C2502 (and user-space enabler).
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
Changes to Ondrej's version:
- An 'if' statement is now a 'switch' statement.
- Throw an error if MMIO register locations are not known.
---
drivers/scsi/g_NCR5380.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)
Index: linux/drivers/scsi/g_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/g_NCR5380.c 2016-01-03 16:04:51.000000000 +1100
+++ linux/drivers/scsi/g_NCR5380.c 2016-01-03 16:04:53.000000000 +1100
@@ -323,7 +323,7 @@ static int __init generic_NCR5380_detect
#endif
break;
case BOARD_NCR53C400A:
- flags = FLAG_NO_PSEUDO_DMA;
+ flags = FLAG_NO_DMA_FIXUP;
ports = ncr_53c400a_ports;
break;
case BOARD_DTC3181E:
@@ -405,27 +405,42 @@ static int __init generic_NCR5380_detect
* On NCR53C400 boards, NCR5380 registers are mapped 8 past
* the base address.
*/
- if (overrides[current_override].board == BOARD_NCR53C400) {
+ switch (overrides[current_override].board) {
+ case BOARD_NCR53C400:
instance->io_port += 8;
hostdata->c400_ctl_status = 0;
hostdata->c400_blk_cnt = 1;
hostdata->c400_host_buf = 4;
+ break;
+ case BOARD_NCR53C400A:
+ hostdata->c400_ctl_status = 9;
+ hostdata->c400_blk_cnt = 10;
+ hostdata->c400_host_buf = 8;
+ break;
}
#else
instance->base = overrides[current_override].NCR5380_map_name;
hostdata->iomem = iomem;
- if (overrides[current_override].board == BOARD_NCR53C400) {
+ switch (overrides[current_override].board) {
+ case BOARD_NCR53C400:
hostdata->c400_ctl_status = 0x100;
hostdata->c400_blk_cnt = 0x101;
hostdata->c400_host_buf = 0x104;
+ break;
+ case BOARD_NCR53C400A:
+ pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
+ goto out_unregister;
}
#endif
if (NCR5380_init(instance, flags))
goto out_unregister;
- if (overrides[current_override].board == BOARD_NCR53C400)
+ switch (overrides[current_override].board) {
+ case BOARD_NCR53C400:
+ case BOARD_NCR53C400A:
NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
+ }
NCR5380_maybe_reset_bus(instance);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Date | 2016-01-03 06:30 +0100 |
| Subject | [PATCH v4 48/78] atari_NCR5380: Fix queue_size limit |
| Message-ID | <qMJoV-1cG-73@gated-at.bofh.it> |
| In reply to | #1300181 |
When a target reports a QUEUE_FULL condition it causes the driver to
update the 'queue_size' limit with the number of currently allocated tags.
At least, that's what's supposed to happen, according to the comments.
Unfortunately the terms in the assignment are swapped. Fix this and
cleanup some obsolete comments.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
---
drivers/scsi/atari_NCR5380.c | 14 ++------------
1 file changed, 2 insertions(+), 12 deletions(-)
Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:00.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2016-01-03 16:04:07.000000000 +1100
@@ -229,9 +229,7 @@ static void do_reset(struct Scsi_Host *)
* cannot know it in advance :-( We just see a QUEUE_FULL status being
* returned. So, in this case, the driver internal queue size assumption is
* reduced to the number of active tags if QUEUE_FULL is returned by the
- * target. The command is returned to the mid-level, but with status changed
- * to BUSY, since --as I've seen-- the mid-level can't handle QUEUE_FULL
- * correctly.
+ * target.
*
* We're also not allowed running tagged commands as long as an untagged
* command is active. And REQUEST SENSE commands after a contingent allegiance
@@ -2152,21 +2150,13 @@ static void NCR5380_information_transfer
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
if (status_byte(cmd->SCp.Status) == QUEUE_FULL) {
- /* Turn a QUEUE FULL status into BUSY, I think the
- * mid level cannot handle QUEUE FULL :-( (The
- * command is retried after BUSY). Also update our
- * queue size to the number of currently issued
- * commands now.
- */
- /* ++Andreas: the mid level code knows about
- QUEUE_FULL now. */
struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][cmd->device->lun];
dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %llu returned "
"QUEUE_FULL after %d commands\n",
HOSTNO, cmd->device->id, cmd->device->lun,
ta->nr_allocated);
if (ta->queue_size > ta->nr_allocated)
- ta->nr_allocated = ta->queue_size;
+ ta->queue_size = ta->nr_allocated;
}
#else
hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
Page 2 of 5 — ← Prev page 1 [2] 3 4 5 Next page →
Back to top | Article view | linux.kernel
csiph-web