The logic to fail queue pairs when the controller is failed should be
handled in the generic code, not in the individual transports.
This also allows nvme_qpair_fail() to be private to nvme_qpair.c.
Change-Id: I6194576dceb35073b9af8847e59314900028637c
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
The spdk_nvme_qpair::num_entries value is never used in the common code,
so move it to the individual transport qpairs to make it clear that it
is a transport-specific implementation detail.
Change-Id: I5c8f0de4fcd808912ba6d248cf5cee816079fd32
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This function initializes the members of an existing
qpair struct. It doesn't construct one from scratch.
Change-Id: I0b9afac1ad25cfb217efd146702f693c74f5f697
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Make the qpair construct functions private to the transports - it
doesn't need to be called from generic code.
Change-Id: I5f730a4bcf60ce231fe27bc8f4c3c39cb647dd2d
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
The probe_info was reduced to just containing a
transport_id, so remove probe_info entirely.
Change-Id: Ica9a22d126cd14e282decd3eea1a0afe0460f099
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
It's not the whole transport - it's just an enum for the
type of transport.
Change-Id: Ia435a21792f221ddf50ddf4f0923c6152622eccb
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Each transport should handle its own qpair cleanup internally.
Change-Id: I7dd737be820ea6bad686f4aad7d74044fad58a47
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
- add SPDK_NVME_OPC_KEEP_ALIVE to admin_opcode
- add SPDK_NVME_SC_INVALID_SGL_OFFSET, SPDK_NVME_SC_INVALID_SGL_OFFSET,
SPDK_NVME_SC_HOSTID_INCONSISTENT_FORMAT, SPDK_NVME_SC_KEEP_ALIVE_EXPIRED
and SPDK_NVME_SC_KEEP_ALIVE_INVALID to generic_status
Function pointers will not work for the DPDK multi-process model (they
can have different addresses in different processes), so define a
transport enum and dispatch functions that switch on the transport type
instead.
Change-Id: Ic16866786eba5e523ce533e56e7a5c92672eb2a5
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This will allow factoring out PCIe-specific code into a swappable
transport so that NVMe over Fabrics host support can be added.
Change-Id: I4df74dd268d655e3b36e8d6114ebe7d79a24844d
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
For the nvme readv/writev APIs, the PRP checking logic was
incorrectly failing single SGE payloads that were larger
than 4KB. This patch adds a test case for this scenario,
and fixes the PRP checking logic.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I6357d620599666046d2cb74d7923dac1f75418c5
Enforce exactly one trailing \n, and fix all of the existing cases.
Change-Id: I6218e4700e90aeb647eaee78089530c79993c8c8
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
assert is part of the C standard library and is available
on any platform we'd consider porting to. Don't put a
wrapper around it.
Change-Id: I0acfdd6a8a269d6c37df38fb7ddf4f1227630223
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
For a single poll of the completion queue, if the user
submits I/O from within their completion callback and their
completion callback is particularly slow to execute, the loop
could potentially continue forever. To support this, we
need to limit the number of completions we'll process
in one batch.
Change-Id: If6bae47e52b36347dbe5622ace68c866ee88a0b2
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Use the knowledge that both the source and destination of
nvme_copy_command() are aligned to emit the aligned variants of the
SSE2/AVX mov instructions.
Change-Id: I0a7e32a3bb10b9a1920cd85691b79fa7172eecb3
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This moves some definitions from nvmf_spec.h to
nvme_spec.h based on the latest publication.
Change-Id: I51b0abd16f7d034696239894aea5089f8ac70c40
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
The conventional rule for returning errno is negative, hence there is no
need to modify caller's code to adjust this NVMe library.
Signed-off-by: Minfei Huang <mnghuan@gmail.com>
Signed-off-by: Minfei Huang <minfei.hmf@alibaba-inc.com>
Avoid potential double free cases.
This fixes a clang warning during scan-build.
Change-Id: I487d6fcd485d1f8ebb96b6f8cb54511628461f39
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
All trackers in outstanding_tr should have a non-NULL request. Add an
assert to verify this.
Fixes a clang warning during scan-build.
Change-Id: I0ac4d2bad17449f684808cbb98777627d890b65b
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Document the requirement that qpair and cmd can't be NULL.
This placates clang, which previously generated a warning
during scan-build.
Change-Id: Ic2d5e808faee0028c890ce1312444fb3dc95f223
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
The D3700/D3600 series support Controller Memory Buffer(CMB) feature,
CMB is available for holding submission queues, for those controllers
which can support submission queues in CMB, user can set the option
whether to enable it or not.
Change-Id: I8b0dc9e28dd6f5bb01bee99a532087212c04e492
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
For those controllers which can support end-to-end data protection
feature, add the support in the driver layer.
Change-Id: Ifac3dd89dec9860773c850416a6116113a6ce22a
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Rename nvme_remove_child_request() to nvme_request_remove_child() and
move it next to nvme_request_add_child() to make the symmetry clear.
Change-Id: I78747c44ab3db1a656b33555a45f634dc5a55b31
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This patch is used to handle the memory leak issue when
a parent nvme_request is free. In our current code,
we did not free the nvme_request allocated by the children
in the exceptional case.
Change-Id: Iabd1f1c3594af60c38e74e3d96c14f78d1aa1aed
Signed-off-by: Ziye Yang <ziye.yang@intel.com>
Drop the "data_transfered" variable and just update length, since length
was not used otherwise after this point in the loop.
Change-Id: Icd2991e4e85de7e8c951ba14c441434e871ea4ef
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
If only one descriptor is needed, there is a special case in the spec for
SGL1 using the Data Block descriptor type. Add a comment to make it
clear what is going on.
Also tweak the SGL1 setup to copy from the first SGL descriptor list
element instead of relying on the last value from the loop above, since
that could be easily broken by accident.
Change-Id: I49ef97fe5bf18d2bf1d86b4310a7d3abdfd03e57
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
tr->u.sgl is already a struct spdk_nvme_sgl_descriptor pointer.
Change-Id: Ie2c8c052fc28e6369d1d095b8d566acae47975d1
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
_nvme_qpair_build_hw_sgl_request() will only be called for payload_size
!= 0, so every SGL will have at least one segment. Drop the 'else' that
was handling nseg == 0, and add an assert to document the payload_size
requirement.
Change-Id: I48e2a862a7657ba85605c0d35c0b65dfac072167
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
The assert is checking a variable that is invariant within the loop, so
move the assert up to the top of the function.
Change-Id: Iee7eea1736bc7f953665feb390c3d6340dbeffbc
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This makes it easier to find the larger doc comments that produce separate
pages.
It also allows removing the lib/nvme directory from the Doxyfile, so
only the public API headers are used to generate documentation.
Change-Id: I8c46edb8067a91dda5b23fb0864efd3dd8aaeba5
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
spdk_nvme_qpair_process_completions() is already documented in
spdk/nvme.h, so merge the doc comment from nvme_qpair.c into the public
header.
Change-Id: Id7722d99d209852ee64286e0a3fa127b863e10aa
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
If the controller is failed, attempting to submit additional I/O is
futile - it will be immediately failed using the completion callback,
which can result in infinite recursion if the application code resubmits
I/Os on failure.
Instead, provide a way for request submission to indicate failure, and
use it to exit early if the controller is failed; this can only happen
when a reset failed (timed out).
If a request is submitted directly by the user when the controller has
failed, we can return an error code directly. For the case where I/O
was queued and is being resubmitted after a reset, we still need to call
the completion handler via _nvme_fail_request_ctrlr_failed().
Change-Id: I9e144328d524b25db2acf48e923b584746e8d0b6
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Replace the previous code that allocated each tracker individually with
one large allocation per queue pair.
struct nvme_tracker is now explicitly padded to reach exactly 4096 bytes
to allow normal array indexing to work correctly while maintaining the
alignment requirement that ensures each tracker's PRP list does not
cross a page boundary.
This also allows removal of the act_tr array, since the tr array can be
indexed directly now, and each tracker can store its own active state.
Change-Id: Ia7c51735b96594d12f7f478cefcc4aedc84207ad
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
The previous method for registering I/O queues did not allow the user
to specify queue priority for weighted round robin arbitration, and it
limited the application to one queue per controller per thread.
Change the API to require explicit allocation of each queue for each
controller using the new function spdk_nvme_ctrlr_alloc_io_qpair().
Each function that submits a command on an I/O queue now takes an
explicit qpair parameter rather than implicitly using the thread-local
queue.
This also allows the application to allocate different numbers of
threads per controller; previously, the number of queues was capped at
the smallest value supported by any attached controller.
Weighted round robin arbitration is not supported yet; additional
changes to the controller startup process are required to enable
alternate arbitration methods.
Change-Id: Ia33be1050a6953bc5a3cca9284aefcd95b01116e
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
When I/O spans a stripe boundary, the driver splits the request into
multiple requests, so for 1 segment memory larger than the stripe
size, we also need to split the segment memory.
Change-Id: I22ea5734d7066865a57a3c90fe18d5f76f373f1d
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
For those NVMe controllers which can support SGL feature in
firmware, we will use SGL for scattered payloads.
Change-Id: If688e6494ed62e8cba1d55fc6372c6e162cc09c3
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
This will be exposed in the public API. This rename is in a separate
commit to ease review.
Change-Id: I1b7fef36f85265db27935ac4d22ceef3c7282502
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
