Below commit queued up for 5.4 includes these changes.
commit 657bd277c162580674ddb86a90c4aeb62639bff5
Author: Gustavo A. R. Silva
Date: Sun Jul 28 19:21:19 2019 -0500
Thanks,
Uma Krishnan
> On Aug 29, 2019, at 7:32 AM, Michal Suchanek wrote:
>
> Add fallthrough comments wher
Below commit queued up for 5.4 includes these changes.commit 657bd277c162580674ddb86a90c4aeb62639bff5Author: Gustavo A. R. Silva Date: Sun Jul 28 19:21:19 2019 -0500Thanks,Uma KrishnanOn Aug 29, 2019, at 7:32 AM, Michal Suchanek wrote:Add fallthrough comments where missing.Signed-off-by: Michal
drivers and adjust the module dependencies accordingly.
This commit isolates the object files that are dependent on CXL and/or
OCXL. The cxl/ocxl fops used in the core driver are tucked under an ifdef
to avoid compilation errors.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/Kconfig | 2
As a staging cleanup to support transport specific builds of the cxlflash
module, relocate device dependent assignments to header files. This will
avoid littering the core driver with conditional compilation logic.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c | 7
The new header file, backend.h, that was recently added is missing
the include guards. This commit adds the guards.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/backend.h | 5 +
1 file changed, 5 insertions(+)
diff --git a/drivers/scsi/cxlflash/backend.h b/drivers/scsi/cxlflash
g a global mutex, transition the mutex to be per-AFU. This
will allow commands to only be blocked by siblings of the same AFU.
Signed-off-by: Matthew R. Ochs
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/common.h | 1 +
drivers/scsi/cxlflash/main.c | 6 +++---
2 files changed, 4 insert
quire it before invoking any
ioctl services.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/superpipe.c | 6 ++
1 file changed, 6 insertions(+)
diff --git a/drivers/scsi/cxlflash/superpipe.c
b/drivers/scsi/cxlflash/superpipe.c
index 04a3bf9..5ba6e62 100644
--- a/drivers/scsi/cxl
useful data in the
log. The best option available is to limit the messages that should
serve most of the common use cases.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi
tly used to
track internal AFU commands and quiesce during reset. This same counter can
also be used for the active send threads.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlfl
This patch series adds few improvements to the cxlflash driver and
it also contains couple of bug fixes.
This patch series is intended for 4.18 and is bisectable.
Matthew R. Ochs (1):
cxlflash: Use local mutex for AFU serialization
Uma Krishnan (6):
cxlflash: Yield to active send threads
> On Mar 28, 2018, at 4:34 PM, Martin K. Petersen
> wrote:
>
>
> Uma,
>
>> This patch series adds OCXL support to the cxlflash driver. With this
>> support, new devices using the OCXL transport will be supported by the
>> cxlflash driver along with the existing CXL devices. An effort is made
flushed, leading to a possible crash when the memory
for the flushed command is accessed.
To resolve this problem, a boolean will indicate if the hardware queue is
ready to process interrupts or not. This can be evaluated in the interrupt
handler before proessing an interrupt.
Signed-off-by: Uma
resolve this issue, when an AFU command or TMF command times out, the
command should be deleted from the hardware queue pending command list
before freeing the buffer.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c | 14 ++
1 file changed, 14 insertions(+)
diff --git a
result in a crash if the recovery
thread tries to access this memory.
To resolve this issue, the cxlflash remove handler will evaluate the
device state and yield to any active reset or probing threads.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c | 6 +++---
1 file changed, 3
This commit enables the OCXL operations for the OCXL devices.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/main.c | 9 +++--
drivers/scsi/cxlflash/main.h | 1 +
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/cxlflash/main.c b
execution.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 17 +
1 file changed, 17 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 5b5565d..0a95b5f 100644
--- a/drivers/scsi/cxlflash
While enabling a context on the link, a predefined callback can be
registered with the OCXL provider services to be notified on translation
errors. These errors can in turn be passed back to the user on a read
operation.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi
to the context state field.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 59 ++---
drivers/scsi/cxlflash/ocxl_hw.h | 8 ++
2 files changed, 64 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/cxlflash
formatting updates to some of the existing bits to
allow all of the definitions to line up uniformly.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/sislite.h | 35 +--
1 file changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers
Similar to user contexts, master contexts also require that the per-context
LISN registers be programmed for certain AFUs. The mapped trigger page is
obtained from underlying transport and registered with AFU for each master
context.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
handle is the mapped trigger page. Note that because
these mappings are kernel only, the PASID of a kernel context must be
used to satisfy the translation.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/common.h| 5 +
drivers/scsi/cxlflash/sislite.h | 5
the core driver as it manages the AFU
specification (SISLite) for cxlflash. Note that for Power systems,
the object handle is the effective address of the trigger page.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/backend.h | 1 +
drivers/scsi/cxlflash
to map and release when requested.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 26 ++
1 file changed, 26 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 8a9f2f4..4bbc1d1
clean up the context when invoked.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 72 +
1 file changed, 72 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index
The cxlflash userspace API requires that users be able to read the adapter
context for any pending events or interrupts from the AFU. Support reading
various events by implementing the AFU read fop to copy out event data.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi
The cxlflash userspace API requires that users be able to poll the adapter
context for any pending events or interrupts from the AFU. Support polling
on various events by implementing the AFU poll fop using a waitqueue.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi
equired
by the SPA. Also, introduce a skeleton interrupt handler using a bitmap,
flag, and spinlock to track interrupts. This handler will be expanded in
future commits.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl
Add support to map and unmap the irq space and manage irq registrations
with the kernel for each allocated AFU interrupt. Also support mapping
the physical trigger page to obtain an effective address that will be
provided to the cxlflash core in a future commit.
Signed-off-by: Uma Krishnan
Acked
Add support to allocate and free AFU interrupts using the OCXL provider
services. The trigger page returned upon successful allocation will be
mapped and exposed to the cxlflash core in a future commit.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c
fault error notification. While not used here, it will be
expanded in a future commit.
Also add a service to stop a context by terminating the corresponding
PASID and remove the process element from the SPA.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash
The first function of the link needs to configure the transaction layer
between the host and device. This is accomplished by a call to the OCXL
provider services.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 10 ++
1 file changed, 10
After reading and modifying the function configuration, setup the OCXL
link using the OCXL provider services. The link is released when the
adapter is unconfigured.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
Reviewed-by: Frederic Barrat
---
drivers/scsi/cxlflash/ocxl_hw.c | 25
Use the PCI VPD services to support reading the VPD data of the
underlying adapter.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 15 +++
1 file changed, 15 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi
The AFU should be enabled following a successful configuration and
disabled near the end of the cleanup path.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
Reviewed-by: Frederic Barrat
---
drivers/scsi/cxlflash/ocxl_hw.c | 9 +
1 file changed, 9 insertions(+)
diff --git a
Once the context is started, the assigned MMIO space can be mapped
and unmapped. Provide means to map and unmap the context MMIO space.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 24
1 file changed, 24 insertions
MMIO space while the rest have access to the context specific space.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 39 +++
drivers/scsi/cxlflash/ocxl_hw.h | 3 +++
2 files changed, 42 insertions(+)
diff --git a
When the AFU is configured, the global and per process MMIO regions
are presented by the configuration space. Save these regions and
map the global MMIO region that is used to access all of the control
and provisioning data in the AFU.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
On a PERST, the AFU image can be reloaded or left intact. Provide means to
set this image reload policy.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 13 +
drivers/scsi/cxlflash/ocxl_hw.h | 1 +
2 files changed, 14 insertions(+)
diff
Provide means to obtain the process element of an adapter context as well
as locate an adapter context by file.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 26 ++
1 file changed, 26 insertions(+)
diff --git a/drivers/scsi
Allocate a file descriptor for an adapter context when requested. In order
to allocate inodes for the file descriptors, a pseudo filesystem is created
and used.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 200
A range of PASIDs are used as identifiers for the adapter contexts. These
contexts may be destroyed and created randomly. Use an IDR to keep track
of contexts that are in use and assign a unique identifier to new ones.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi
is created when the hardware AFU is
initialized. This is returned by the get_context() fop.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
Reviewed-by: Frederic Barrat
---
drivers/scsi/cxlflash/ocxl_hw.c | 90 +
drivers/scsi/cxlflash/ocxl_hw.h
Per the OCXL specification, the maximum PASID supported by the AFU is
indicated by a field within the configuration space. Similar to acTags,
implementations can choose to use any sub-range of PASID within their
assigned range. For cxlflash, the entire range is used.
Signed-off-by: Uma Krishnan
The OCXL specification supports distributing acTags amongst different
AFUs and functions on the link. As cxlflash devices are expected to only
support a single AFU per function, the entire range that was assigned to
the function is also assigned to the AFU.
Signed-off-by: Uma Krishnan
Acked-by
The host AFU configuration is read on the initialization path to identify
the features and configuration of the AFU. This data is cached for use in
later configuration steps.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
Reviewed-by: Andrew Donnellan
Reviewed-by: Frederic Barrat
The OCXL specification supports distributing acTags amongst different
AFUs and functions on the link. The platform-specific acTag range for the
link is obtained using the OCXL provider services and then assigned to the
host function based on implementation.
Signed-off-by: Uma Krishnan
Acked-by
functions present. This data is cached for use in later configuration
steps. Note that for the OCXL hardware supported by the cxlflash driver,
only one AFU per function is expected.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
Reviewed-by: Andrew Donnellan
Reviewed-by: Frederic Barrat
: Uma Krishnan
Acked-by: Matthew R. Ochs
Reviewed-by: Andrew Donnellan
---
drivers/scsi/cxlflash/backend.h | 1 +
drivers/scsi/cxlflash/cxl_hw.c | 6 ++
drivers/scsi/cxlflash/main.c| 9 +++--
drivers/scsi/cxlflash/ocxl_hw.c | 40
drivers/scsi
Add initial infrastructure to support a new cxlflash transport, OCXL.
Claim a dependency on OCXL and add a new file, ocxl_hw.c, which will host
the backend routines that are specific to OCXL.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
Reviewed-by: Andrew Donnellan
---
drivers/scsi
Checkpatch throws a warning when the argument identifier names are not
included in the function definitions.
To avoid these warnings, argument identifiers are added in the existing
function definitions.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/backend.h
ned-off-by: Matthew R. Ochs
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c| 5 -
drivers/scsi/cxlflash/sislite.h | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index 3d3e003..b83a55a 100644
--- a/dr
in more than one place, preserve the value in the master context
structure.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/common.h | 1 +
drivers/scsi/cxlflash/main.c | 11 ---
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi
- Added 3 new patches to the end of the series which resolve corner cases
v2 Changes:
- Replaced OpenCXL with OCXL in the commit messages and comments
Matthew R. Ochs (1):
cxlflash: Avoid clobbering context control register value
Uma Krishnan (40):
cxlflash: Preserve number of interrupts for
> On Mar 22, 2018, at 12:12 PM, Frederic Barrat
> wrote:
>
>
>
> Le 26/02/2018 à 23:21, Uma Krishnan a écrit :
>> Allocate a file descriptor for an adapter context when requested. In order
>> to allocate inodes for the file descriptors, a pseudo filesystem is
> On Mar 22, 2018, at 11:40 AM, Frederic Barrat
> wrote:
>
>
>
> Le 26/02/2018 à 23:21, Uma Krishnan a écrit :
>> A range of PASIDs are used as identifiers for the adapter contexts. These
>> contexts may be destroyed and created randomly. Use an IDR to keep tr
This commit enables the OCXL operations for the OCXL devices.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/main.c | 9 +++--
drivers/scsi/cxlflash/main.h | 1 +
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/cxlflash/main.c b
execution.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 17 +
1 file changed, 17 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 9356672..3c311f3 100644
--- a/drivers/scsi/cxlflash
While enabling a context on the link, a predefined callback can be
registered with the OCXL provider services to be notified on translation
errors. These errors can in turn be passed back to the user on a read
operation.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi
to the context state field.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 59 ++---
drivers/scsi/cxlflash/ocxl_hw.h | 8 ++
2 files changed, 64 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/cxlflash
formatting updates to some of the existing bits to
allow all of the definitions to line up uniformly.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/sislite.h | 35 +--
1 file changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers
Similar to user contexts, master contexts also require that the per-context
LISN registers be programmed for certain AFUs. The mapped trigger page is
obtained from underlying transport and registered with AFU for each master
context.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
handle is the mapped trigger page. Note that because
these mappings are kernel only, the PASID of a kernel context must be
used to satisfy the translation.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/common.h| 5 +
drivers/scsi/cxlflash/sislite.h | 5
the core driver as it manages the AFU
specification (SISLite) for cxlflash. Note that for Power systems,
the object handle is the effective address of the trigger page.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/backend.h | 1 +
drivers/scsi/cxlflash
to map and release when requested.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 26 ++
1 file changed, 26 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 226fd6b..cb1becd
clean up the context when invoked.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 72 +
1 file changed, 72 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index
The cxlflash userspace API requires that users be able to read the adapter
context for any pending events or interrupts from the AFU. Support reading
various events by implementing the AFU read fop to copy out event data.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi
The cxlflash userspace API requires that users be able to poll the adapter
context for any pending events or interrupts from the AFU. Support polling
on various events by implementing the AFU poll fop using a waitqueue.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi
equired
by the SPA. Also, introduce a skeleton interrupt handler using a bitmap,
flag, and spinlock to track interrupts. This handler will be expanded in
future commits.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl
Add support to map and unmap the irq space and manage irq registrations
with the kernel for each allocated AFU interrupt. Also support mapping
the physical trigger page to obtain an effective address that will be
provided to the cxlflash core in a future commit.
Signed-off-by: Uma Krishnan
Acked
Add support to allocate and free AFU interrupts using the OCXL provider
services. The trigger page returned upon successful allocation will be
mapped and exposed to the cxlflash core in a future commit.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c
fault error notification. While not used here, it will be
expanded in a future commit.
Also add a service to stop a context by terminating the corresponding
PASID and remove the process element from the SPA.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash
The first function of the link needs to configure the transaction layer
between the host and device. This is accomplished by a call to the OCXL
provider services.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 10 ++
1 file changed, 10
After reading and modifying the function configuration, setup the OCXL
link using the OCXL provider services. The link is released when the
adapter is unconfigured.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 25 ++---
drivers
Use the PCI VPD services to support reading the VPD data of the
underlying adapter.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 15 +++
1 file changed, 15 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi
The AFU should be enabled following a successful configuration and
disabled near the end of the cleanup path.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 9 +
1 file changed, 9 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b
Once the context is started, the assigned MMIO space can be mapped
and unmapped. Provide means to map and unmap the context MMIO space.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 24
1 file changed, 24 insertions
MMIO space while the rest have access to the context specific space.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 39 +++
drivers/scsi/cxlflash/ocxl_hw.h | 3 +++
2 files changed, 42 insertions(+)
diff --git a
When the AFU is configured, the global and per process MMIO regions
are presented by the configuration space. Save these regions and
map the global MMIO region that is used to access all of the control
and provisioning data in the AFU.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
On a PERST, the AFU image can be reloaded or left intact. Provide means to
set this image reload policy.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 13 +
drivers/scsi/cxlflash/ocxl_hw.h | 1 +
2 files changed, 14 insertions(+)
diff
Provide means to obtain the process element of an adapter context as well
as locate an adapter context by file.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 26 ++
1 file changed, 26 insertions(+)
diff --git a/drivers/scsi
Allocate a file descriptor for an adapter context when requested. In order
to allocate inodes for the file descriptors, a pseudo filesystem is created
and used.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 200
A range of PASIDs are used as identifiers for the adapter contexts. These
contexts may be destroyed and created randomly. Use an IDR to keep track
of contexts that are in use and assign a unique identifier to new ones.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi
is created when the hardware AFU is
initialized. This is returned by the get_context() fop.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 90 +
drivers/scsi/cxlflash/ocxl_hw.h | 6 +++
2 files changed, 96
Per the OCXL specification, the maximum PASID supported by the AFU is
indicated by a field within the configuration space. Similar to acTags,
implementations can choose to use any sub-range of PASID within their
assigned range. For cxlflash, the entire range is used.
Signed-off-by: Uma Krishnan
The OCXL specification supports distributing acTags amongst different
AFUs and functions on the link. As cxlflash devices are expected to only
support a single AFU and function, the entire range that was assigned to
the function is also assigned to the AFU.
Signed-off-by: Uma Krishnan
Acked-by
The host AFU configuration is read on the initialization path to identify
the features and configuration of the AFU. This data is cached for use in
later configuration steps.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 34
function per host is expected and thus the entire range is assigned.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 15 +++
drivers/scsi/cxlflash/ocxl_hw.h | 3 +++
2 files changed, 18 insertions(+)
diff --git a/drivers/scsi/cxlflash
functions present. This data is cached for use in later configuration
steps. Note that for the OCXL hardware supported by the cxlflash driver,
only one AFU per function is expected.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/ocxl_hw.c | 41
: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/backend.h | 1 +
drivers/scsi/cxlflash/cxl_hw.c | 6 ++
drivers/scsi/cxlflash/main.c| 9 +++--
drivers/scsi/cxlflash/ocxl_hw.c | 40
drivers/scsi/cxlflash/ocxl_hw.h | 19
Add initial infrastructure to support a new cxlflash transport, OCXL.
Claim a dependency on OCXL and add a new file, ocxl_hw.c, which will host
the backend routines that are specific to OCXL.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/Kconfig | 2
Checkpatch throws a warning when the argument identifier names are not
included in the function definitions.
To avoid these warnings, argument identifiers are added in the existing
function definitions.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/backend.h
ned-off-by: Matthew R. Ochs
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c| 5 -
drivers/scsi/cxlflash/sislite.h | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index 3d3e003..b83a55a 100644
--- a/dr
in more than one place, preserve the value in the master context
structure.
Signed-off-by: Uma Krishnan
Acked-by: Matthew R. Ochs
---
drivers/scsi/cxlflash/common.h | 1 +
drivers/scsi/cxlflash/main.c | 11 ---
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi
register value
Uma Krishnan (37):
cxlflash: Preserve number of interrupts for master contexts
cxlflash: Add argument identifier names
cxlflash: Introduce OCXL backend
cxlflash: Hardware AFU for OCXL
cxlflash: Read host function configuration
cxlflash: Setup function acTag range
cxlflash
On Feb 22, 2018, at 10:13 PM, Andrew Donnellan wrote:On 23/02/18 09:20, Uma Krishnan wrote:This patch series adds OpenCXL support to the cxlflash driver. Withthis support, new devices using the OpenCXL transport will be supportedby the cxlflash driver along with the existing CXL devices. An
> On Feb 22, 2018, at 10:13 PM, Andrew Donnellan
> wrote:
>
> On 23/02/18 09:20, Uma Krishnan wrote:
>> This patch series adds OpenCXL support to the cxlflash driver. With
>> this support, new devices using the OpenCXL transport will be supported
>> by the
> On Feb 22, 2018, at 10:28 PM, Andrew Donnellan
> wrote:
>
> On 23/02/18 09:22, Uma Krishnan wrote:
>> Add initial infrastructure to support a new cxlflash transport, OpenCXL.
>> Claim a dependency on OpenCXL (OCXL) and add a new file, ocxl_hw.c, which
>> will
On a PERST, the AFU image can be reloaded or left intact. Provide means to
set this image reload policy.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/ocxl_hw.c | 13 +
drivers/scsi/cxlflash/ocxl_hw.h | 1 +
2 files changed, 14 insertions(+)
diff --git a/drivers/scsi
This commit enables the OpenCXL operations for the OpenCXL devices.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c | 9 +++--
drivers/scsi/cxlflash/main.h | 1 +
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash
execution.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/ocxl_hw.c | 17 +
1 file changed, 17 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index dc45ed2..8a1a9fc 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ b/drivers/scsi
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