addresses.
This patch defines CSB_CC_FAULT_ADDRESS(250) and updates CSB.CC with
this proper error code for user space.
Signed-off-by: Haren Myneni
Changes in V2:
- Use CSB_CC_FAULT_ADDRESS instead of CSB_CC_ADDRESS_TRANSLATION
to distinguish from other error codes.
- Add NX workbook reference in
"Linuxppc-dev"
wrote on 07/09/2020 04:22:10 AM:
> From: Michael Ellerman
> To: Haren Myneni
> Cc: tuli...@br.ibm.com, ab...@us.ibm.com, linuxppc-
> d...@lists.ozlabs.org, rzin...@linux.ibm.com
> Date: 07/09/2020 04:21 AM
> Subject: [EXTERNAL] Re: [PATCH 1/2] powe
the request is not successful.
Signed-off-by: Haren Myneni
---
tools/testing/selftests/powerpc/nx-gzip/gunz_test.c | 4 ++--
tools/testing/selftests/powerpc/nx-gzip/gzfht_test.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/tools/testing/selftests/powerpc/nx-gzip
.
This patch defines CSB_CC_ADDRESS_TRANSLATION(250) and updates
CSB.CC with this proper error code for user space.
Signed-off-by: Haren Myneni
---
Documentation/powerpc/vas-api.rst | 2 +-
arch/powerpc/include/asm/icswx.h | 2 ++
arch/powerpc/platforms/powernv/vas-fault.c | 2
Thanks for fixing. Tested with this patch and 7fe021a3f1c9 ("kernel: better
document the use_mm/unuse_mm API contract").
Acked-by: Haren Myneni
On 4/21/20 11:39 PM, Stephen Rothwell wrote:
> Hi all,
>
> After merging the akpm tree, today's linux-next build (p
Stephen, Sorry missed it. Thanks for fixing it.
Acked-by: Haren Myneni
On 4/21/20 10:41 PM, Stephen Rothwell wrote:
> Hi all,
>
> After merging the powerpc tree, today's linux-next build (powerpc
> allyesconfig) failed like this:
>
> In file included from :32:
> ./us
-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
Documentation/powerpc/index.rst | 1 +
Documentation/powerpc/vas-api.rst | 292 ++
2 files changed, 293 insertions(+)
create mode 100644 Documentation/powerpc/vas-api.rst
diff --git a
When window is opened, pid reference is taken for user space
windows. Not needed for kernel windows. So remove 'pid' in
vas_tx_win_attr struct.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
arch/powerpc/include/asm/vas.h| 1 -
drivers/crypto/nx/nx-common-powernv.
Changes to probe GZIP device-tree nodes, open RX windows and setup
GZIP compression type. No plans to provide GZIP usage in kernel right
now, but this patch enables GZIP for user space usage.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-common-powernv.c | 46
Make setup and enable code generic to support new GZIP compression type.
Changed nx842 reference to nx and moved some code to new functions.
Functionality is not changed except sparse warning fix - setting NULL
instead of 0 for per_cpu send window in nx_delete_coprocs().
Signed-off-by: Haren
Rename nx-842-powernv.c to nx-common-powernv.c to add code for setup
and enable new GZIP compression type. The actual functionality is not
changed in this patch.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/Makefile|2 +-
drivers/crypto/nx/nx-842
obe()
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-842-powernv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/crypto/nx/nx-842-powernv.c
b/drivers/crypto/nx/nx-842-powernv.c
index c037a24..8e63326 100644
--- a/drivers/crypto/nx/nx-
Thanks to Michael Ellerman for his changes and suggestions to make the
ioctl generic to support any coprocessor type.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 12 ++
arch/powerpc/platforms/powernv/Makefile | 2 +-
ar
Define the VAS_TX_WIN_OPEN ioctl interface for NX GZIP access
from user space. This interface is used to open GZIP send window and
mmap region which can be used by userspace to send requests to NX
directly with copy/paste instructions.
Signed-off-by: Haren Myneni
---
Documentation/userspace
Initialize send and receive window attributes for GZIP high and
normal priority types.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas-window.c
to support any coprocessor type (Michael Ellerman)
(patches 3&7)
Haren Myneni (9):
powerpc/vas: Initialize window attributes for GZIP coprocessor type
powerpc/vas: Define VAS_TX_WIN_OPEN ioctl API
powerpc/vas: Add VAS user space API
crypto/nx: Initialize coproc entry with kzalloc
crypto
windows. We are adding
VAS userspace support along with this fix. So no need to include this
fix in stable releases.
Fixes: 9d2a4d71332c ("powerpc: Define set_thread_uses_vas()")
Signed-off-by: Haren Myneni
Reported-by: Nicholas Piggin
Suggested-by: Milton Miller
Suggested-by: Nicho
NX may be processing requests while trying to close window. Wait until
all credits are returned and then free send window from VAS instance.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch
Process can not close send window until all requests are processed.
Means wait until window state is not busy and send credits are
returned. Display debug messages in case taking longer to close the
window.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 30
System checkstops if RxFIFO overruns with more requests than the
maximum possible number of CRBs allowed in FIFO at any time. So
max credits value (rxattr.wcreds_max) is set and is passed to
vas_rx_win_open() by the the driver.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv
Dump FIFO entries if could not find send window and print CRB
for debugging.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 41 ++
1 file changed, 41 insertions(+)
diff --git a/arch/powerpc
credits are not available, returns RMA_Busy for send
window and RMA_Reject for fault window.
NX expects OS to return credit for send window after processing fault
CRB. Also credit has to be returned for fault window after handling
the fault.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren
each CRB, determine the corresponding
send window using pswid (from CRB) and process fault CRB. Then
invalidate the entry and return credit. Processing fault CRB and
return credit is described in subsequent patches.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc
applications, child thread may not be
available. So if the task is not running, send signal to tgid.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 126 -
1 file changed, 125 insertions(+), 1 deletion
signal will be sent to thread group leader
(tgid).
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-debug.c | 2 +-
arch/powerpc/platforms/powernv/vas-window.c | 50 ++---
arch/powerpc/platforms/powernv/vas.h| 9 +-
3 files changed, 55
For each user space send window, register NX with fault window ID
and port value so that NX paste CRBs in this fault FIFO when it
sees fault on the request buffer.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 15
: Haren Myneni
---
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch/powerpc/platforms/powernv/vas-fault.c | 77 +
arch/powerpc/platforms/powernv/vas-window.c | 4 +-
arch/powerpc/platforms/powernv/vas.c| 20
arch/powerpc/platforms/powernv/vas.h
.
Signed-off-by: Haren Myneni
Reviewed-by: Cédric Le Goater
---
arch/powerpc/platforms/powernv/vas.c | 44 +++-
arch/powerpc/platforms/powernv/vas.h | 2 ++
2 files changed, 40 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas.c
b/arch
: Haren Myneni
---
arch/powerpc/include/asm/icswx.h | 20 ++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/icswx.h b/arch/powerpc/include/asm/icswx.h
index 9872f85..965b1f3 100644
--- a/arch/powerpc/include/asm/icswx.h
+++ b/arch/powerpc
This function allocates IRQ on a specific chip. VAS needs per chip
IRQ allocation and will have IRQ handler per VAS instance.
Signed-off-by: Haren Myneni
Reviewed-by: Cédric Le Goater
---
arch/powerpc/include/asm/xive.h | 9 -
arch/powerpc/sysdev/xive/native.c | 6 +++---
2 files
instead of pr_debug to display message during
window close (patch12)
- Moved set_thread_uses_vas() to vas_win_open() (patch14)
Haren Myneni (14):
powerpc/xive: Define xive_native_alloc_irq_on_chip()
powerpc/vas: Define nx_fault_stamp in coprocessor_request_block
powerpc/vas: Alloc an
(Thanks Michael for your review. Here is the updated patch with your
comments and from Nick - Moved mm_context_add/remove_coproc() to
add/remove_vas_window())
>From 521f86710f3605dc575f13634fd7520087993ffb Mon Sep 17 00:00:00 2001
From: Haren Myneni
Date: Wed, 1 Apr 2020 23:12:12 -0500
Subj
, issue CP_ABORT during context switch. It means
clear the foreign real address mapping only if the process / thread uses
COPY/PASTE. Then disable it for that process if windows are not open.
Signed-off-by: Haren Myneni
Reported-by: Nicholas Piggin
Suggested-by: Milton Miller
Suggested-by
NX may be processing requests while trying to close window. Wait until
all credits are returned and then free send window from VAS instance.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch
Process can not close send window until all requests are processed.
Means wait until window state is not busy and send credits are
returned. Display debug messages in case taking longer to close the
window.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 28
System checkstops if RxFIFO overruns with more requests than the
maximum possible number of CRBs allowed in FIFO at any time. So
max credits value (rxattr.wcreds_max) is set and is passed to
vas_rx_win_open() by the the driver.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv
Dump FIFO entries if could not find send window and print CRB
for debugging.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 41 ++
1 file changed, 41 insertions(+)
diff --git a/arch/powerpc
credits are not available, returns RMA_Busy for send
window and RMA_Reject for fault window.
NX expects OS to return credit for send window after processing fault
CRB. Also credit has to be returned for fault window after handling
the fault.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren
applications, child thread may not be
available. So if the task is not running, send signal to tgid.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 126 -
1 file changed, 125 insertions(+), 1 deletion
each CRB, determine the corresponding
send window using pswid (from CRB) and process fault CRB. Then
invalidate the entry and return credit. Processing fault CRB and
return credit is described in subsequent patches.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc
, SEGV signal will be sent to thread group leader
(tgid).
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-debug.c | 2 +-
arch/powerpc/platforms/powernv/vas-window.c | 50 ++---
arch/powerpc/platforms/powernv/vas.h| 9 +-
3 files changed, 55
For each user space send window, register NX with fault window ID
and port value so that NX paste CRBs in this fault FIFO when it
sees fault on the request buffer.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 15
: Haren Myneni
---
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch/powerpc/platforms/powernv/vas-fault.c | 77 +
arch/powerpc/platforms/powernv/vas-window.c | 4 +-
arch/powerpc/platforms/powernv/vas.c| 20
arch/powerpc/platforms/powernv/vas.h
.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas.c | 44 +++-
arch/powerpc/platforms/powernv/vas.h | 2 ++
2 files changed, 40 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas.c
b/arch/powerpc/platforms/powernv
: Haren Myneni
---
arch/powerpc/include/asm/icswx.h | 20 ++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/icswx.h b/arch/powerpc/include/asm/icswx.h
index 9872f85..965b1f3 100644
--- a/arch/powerpc/include/asm/icswx.h
+++ b/arch/powerpc
This function allocates IRQ on a specific chip. VAS needs per chip
IRQ allocation and will have IRQ handler per VAS instance.
Signed-off-by: Haren Myneni
Reviewed-by: Cédric Le Goater
---
arch/powerpc/include/asm/xive.h | 9 -
arch/powerpc/sysdev/xive/native.c | 6 +++---
2 files
ude patch to enable and disable CP_ABORT execution using
mm_context->vas_windows counter.
- Remove 'if (txwin)' line which is covered with 'else' before (patch6)
Haren Myneni (14):
powerpc/xive: Define xive_native_alloc_irq_on_chip()
powerpc/vas: Define nx_fault_st
send window in nx_delete_coprocs().
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-common-powernv.c | 161 +-
1 file changed, 101 insertions(+), 60 deletions(-)
diff --git a/drivers/crypto/nx/nx-common-powernv.c
b/drivers/crypto/nx/nx
. Then if child
thread is not running, SEGV signal will be sent to thread group leader
(tgid).
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-debug.c | 2 +-
arch/powerpc/platforms/powernv/vas-window.c | 53 ++---
arch/powerpc/platforms/powernv/vas.h
.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
Documentation/powerpc/index.rst | 1 +
Documentation/powerpc/vas-api.rst | 292 ++
2 files changed, 293 insertions(+)
create mode 100644 Documentation/powerpc/vas-api.rst
diff --git a
When window is opened, pid reference is taken for user space
windows. Not needed for kernel windows. So remove 'pid' in
vas_tx_win_attr struct.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
arch/powerpc/include/asm/vas.h| 1 -
drivers/crypto/nx/nx-common-powernv.
Changes to probe GZIP device-tree nodes, open RX windows and setup
GZIP compression type. No plans to provide GZIP usage in kernel right
now, but this patch enables GZIP for user space usage.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-common-powernv.c | 43
Make setup and enable code generic to support new GZIP compression type.
Changed nx842 reference to nx and moved some code to new functions.
Functionality is not changed except sparse warning fix - setting NULL
instead of 0 for per_cpu send window in nx_delete_coprocs().
Signed-off-by: Haren
Rename nx-842-powernv.c to nx-common-powernv.c to add code for setup
and enable new GZIP compression type. The actual functionality is not
changed in this patch.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/Makefile|2 +-
drivers/crypto/nx/nx-842
obe()
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-842-powernv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/crypto/nx/nx-842-powernv.c
b/drivers/crypto/nx/nx-842-powernv.c
index c037a24..8e63326 100644
--- a/drivers/crypto/nx/nx-
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 11 ++
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch/powerpc/platforms/powernv/vas-api.c| 257
arch/powerpc/platforms/powernv/vas-wind
Define the VAS_TX_WIN_OPEN ioctl interface for NX GZIP access
from user space. This interface is used to open GZIP send window and
mmap region which can be used by user space to send requests to NX
directly with copy/paste instructions.
Signed-off-by: Haren Myneni
---
Documentation/userspace
Initialize send and receive window attributes for GZIP high and
normal priority types.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas-window.c
paste links in VAS API documentation
in patch and other changes as Daniel Axtens suggested
V5:
- Added "NX Fault handling" section in VAS API documentation as Nick
suggested.
- Dcoumentation: mmap size should be PAGE_SIZE as Daniel Axtens pointed.
Haren Myneni (9):
powerpc/vas:
NX may be processing requests while trying to close window. Wait until
all credits are returned and then free send window from VAS instance.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch
Process can not close send window until all requests are processed.
Means wait until window state is not busy and send credits are
returned. Display debug messages in case taking longer to close the
window.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 28
System checkstops if RxFIFO overruns with more requests than the
maximum possible number of CRBs allowed in FIFO at any time. So
max credits value (rxattr.wcreds_max) is set and is passed to
vas_rx_win_open() by the the driver.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv
Dump FIFO entries if could not find send window and print CRB
for debugging.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 41 ++
1 file changed, 41 insertions(+)
diff --git a/arch/powerpc
credits are not available, returns RMA_Busy for send
window and RMA_Reject for fault window.
NX expects OS to return credit for send window after processing fault
CRB. Also credit has to be returned for fault window after handling
the fault.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren
applications, child thread may not be
available. So if the task is not running, send signal to tgid.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 126 -
1 file changed, 125 insertions(+), 1 deletion
each CRB, determine the corresponding
send window using pswid (from CRB) and process fault CRB. Then
invalidate the entry and return credit. Processing fault CRB and
return credit is described in subsequent patches.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc
signal will be sent to thread group leader
(tgd).
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-debug.c | 2 +-
arch/powerpc/platforms/powernv/vas-window.c | 53 ++---
arch/powerpc/platforms/powernv/vas.h| 9 -
3 files changed, 57
For each user space send window, register NX with fault window ID
and port value so that NX paste CRBs in this fault FIFO when it
sees fault on the request buffer.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 15
: Haren Myneni
---
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch/powerpc/platforms/powernv/vas-fault.c | 77 +
arch/powerpc/platforms/powernv/vas-window.c | 4 +-
arch/powerpc/platforms/powernv/vas.c| 20
arch/powerpc/platforms/powernv/vas.h
.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas.c | 44 +++-
arch/powerpc/platforms/powernv/vas.h | 2 ++
2 files changed, 40 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas.c
b/arch/powerpc/platforms/powernv
: Haren Myneni
---
arch/powerpc/include/asm/icswx.h | 20 ++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/icswx.h b/arch/powerpc/include/asm/icswx.h
index 9872f85..965b1f3 100644
--- a/arch/powerpc/include/asm/icswx.h
+++ b/arch/powerpc
This function allocates IRQ on a specific chip. VAS needs per chip
IRQ allocation and will have IRQ handler per VAS instance.
Signed-off-by: Haren Myneni
Reviewed-by: Cédric Le Goater
---
arch/powerpc/include/asm/xive.h | 9 -
arch/powerpc/sysdev/xive/native.c | 6 +++---
2 files
king PID reference" patch before setting VAS fault handler
patch
- Removed mutex_lock/unlock (patch7)
- Other cleanup changes
Haren Myneni (13):
powerpc/xive: Define xive_native_alloc_irq_on_chip()
powerpc/vas: Define nx_fault_stamp in coprocessor_request_block
On Tue, 2020-03-24 at 14:41 +1100, Michael Ellerman wrote:
> Daniel Axtens writes:
> > Michael Ellerman writes:
> >> Daniel Axtens writes:
> >>> Haren Myneni writes:
> >>>> diff --git a/arch/powerpc/platforms/powernv/vas-api.c
> >>>>
and How this credit system works.
Thought vas_return_credit() is unique function and added as separate
patch so that easy to review.
>
> >
> > Signed-off-by: Sukadev Bhattiprolu
> > Signed-off-by: Haren Myneni
> > ---
> > arch/powerpc/platforms/powernv/vas-fault.c
On Mon, 2020-03-23 at 12:40 +1000, Nicholas Piggin wrote:
> Haren Myneni's on March 19, 2020 4:18 pm:
> >
> > System checkstops if RxFIFO overruns with more requests than the
> > maximum possible number of CRBs allowed in FIFO at any time. So
> > max credits value (rxattr.wcreds_max) is set and is
n the request, it raises an interrupt on the CPU to
> handle the fault.
>
>
> >
> > Signed-off-by: Sukadev Bhattiprolu
> > Signed-off-by: Haren Myneni
> > ---
> > arch/powerpc/platforms/powernv/vas-fault.c | 90
> > +
On Tue, 2020-03-24 at 15:48 +0100, Cédric Le Goater wrote:
> On 3/19/20 7:14 AM, Haren Myneni wrote:
> >
> > Alloc IRQ and get trigger port address for each VAS instance. Kernel
> > register this IRQ per VAS instance and sets this port for each send
> > window. NX in
On Mon, 2020-03-23 at 10:27 +0100, Cédric Le Goater wrote:
> On 3/23/20 10:06 AM, Cédric Le Goater wrote:
> > On 3/19/20 7:14 AM, Haren Myneni wrote:
> >>
> >> Alloc IRQ and get trigger port address for each VAS instance. Kernel
> >> register this IRQ per VAS
ault. User space gets the signal
> >> and handles the fault mentioned in CRB by bringing the page in to
> >> memory and send NX request again.
> >>
> >> Signed-off-by: Sukadev Bhattiprolu
> >> Signed-off-by: Haren Myneni
> >> ---
> >
-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
Documentation/powerpc/index.rst | 1 +
Documentation/powerpc/vas-api.rst | 249 ++
2 files changed, 250 insertions(+)
create mode 100644 Documentation/powerpc/vas-api.rst
diff --git a
When window is opened, pid reference is taken for user space
windows. Not needed for kernel windows. So remove 'pid' in
vas_tx_win_attr struct.
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h| 1 -
drivers/crypto/nx/nx-common-powernv.c | 1 -
2 files
Changes to probe GZIP device-tree nodes, open RX windows and setup
GZIP compression type. No plans to provide GZIP usage in kernel right
now, but this patch enables GZIP for user space usage.
Signed-off-by: Haren Myneni
---
drivers/crypto/nx/nx-common-powernv.c | 43
Make setup and enable code generic to support new GZIP compression type.
Changed nx842 reference to nx and moved some code to new functions.
Functionality is not changed except sparse warning fix - setting NULL
instead of 0 for per_cpu send window in nx_delete_coprocs().
Signed-off-by: Haren
Rename nx-842-powernv.c to nx-common-powernv.c to add code for setup
and enable new GZIP compression type. The actual functionality is not
changed in this patch.
Signed-off-by: Haren Myneni
---
drivers/crypto/nx/Makefile|2 +-
drivers/crypto/nx/nx-842-powernv.c| 1062
obe()
Signed-off-by: Haren Myneni
---
drivers/crypto/nx/nx-842-powernv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/crypto/nx/nx-842-powernv.c
b/drivers/crypto/nx/nx-842-powernv.c
index c037a24..8e63326 100644
--- a/drivers/crypto/nx/nx-842-powernv.c
+++ b/driv
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 11 ++
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch/powerpc/platforms/powernv/vas-api.c| 257
arch/powerpc/platforms/powernv/vas-wind
Define the VAS_TX_WIN_OPEN ioctl interface for NX GZIP access
from user space. This interface is used to open GZIP send window and
mmap region which can be used by userspace to send requests to NX
directly with copy/paste instructions.
Signed-off-by: Haren Myneni
---
Documentation/userspace
Initialize send and receive window attributes for GZIP high and
normal priority types.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas-window.c
paste links in VAS API documentation
in patch and other changes as Daniel Axtens suggested
Haren Myneni (9):
powerpc/vas: Initialize window attributes for GZIP coprocessor type
powerpc/vas: Define VAS_TX_WIN_OPEN ioctl API
powerpc/vas: Add VAS user space API
crypto/nx: Initialize coproc entry
On Mon, 2020-03-23 at 10:06 +1000, Nicholas Piggin wrote:
> Haren Myneni's on March 18, 2020 5:27 am:
> > On Tue, 2020-03-17 at 16:28 +1100, Michael Ellerman wrote:
> >> Haren Myneni writes:
> >> > For each fault CRB, update fault address in CRB (fault_storage
ndles the fault mentioned in CRB by bringing the page in to
> > memory and send NX request again.
> >
> > Signed-off-by: Sukadev Bhattiprolu
> > Signed-off-by: Haren Myneni
> > ---
> > arch/powerpc/include/asm/icswx.h | 18 +-
> > 1 file c
to establish channel to NX for userspace. This document
> > describes user space API that application can use to establish
> > communication channel.
> >
> > Signed-off-by: Sukadev Bhattiprolu
> > Signed-off-by: Haren Myneni
> > ---
> > Documentation/
On Fri, 2020-03-20 at 23:18 +1100, Daniel Axtens wrote:
> Haren Myneni writes:
>
> > On power9, userspace can send GZIP compression requests directly to NX
> > once kernel establishes NX channel / window with VAS. This patch provides
> > user space API which allows
NX may be processing requests while trying to close window. Wait until
all credits are returned and then free send window from VAS instance.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch
Process can not close send window until all requests are processed.
Means wait until window state is not busy and send credits are
returned. Display debug messages in case taking longer to close the
window.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 28
NX expects OS to return credit for send window after processing each
fault. Also credit has to be returned even for fault window.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 9 +
arch/powerpc/platforms/powernv/vas
System checkstops if RxFIFO overruns with more requests than the
maximum possible number of CRBs allowed in FIFO at any time. So
max credits value (rxattr.wcreds_max) is set and is passed to
vas_rx_win_open() by the the driver.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv
Dump FIFO entries if could not find send window and print CRB
for debugging.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 41 ++
1 file changed, 41 insertions(+)
diff --git a/arch/powerpc
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 115 +
1 file changed, 115 insertions(+)
diff --git a/arch/powerpc/platforms/powernv/vas-fault.c
b/arch/powerpc/platforms/powernv/vas-fault.c
index 1c6d5cc..6eceac5d 100644
--- a/arch/powerpc
301 - 400 of 686 matches
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