This ensures that we don't run out of free descriptors
and queue entries.
Change-Id: I3c6960564032ffce6e6b6bf887e8c5e12fdf3205
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/378153
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
bdev_virtio I/O poller used to interfere with scan poller.
e.g. GPT read could be picked up by scan poller.
Even if such request is instantly rejected, this would cause
both GPT and scan to fail. Instead, defer bdev_register
until after the virtio_hw scan has finished.
I/O poller logic will still have to be greatly refactored to
add proper multiqueue/multibdev support. However, this patch
lifts scan processing responsibility from any I/O pollers.
Change-Id: I201de8aa0dc1db71ed836fd5e74d55604950f271
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/378064
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Save us some allocations and fix
scan_target() error handling path
Change-Id: I29fe18a6e592c7fd32d0486f831f6b053f59b561
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/375604
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
The bdev modules now take all read, write, unmap, and flush requests in
terms of blocks rather than bytes.
The public bdev APIs still accept offset and length in bytes for now.
Change-Id: I57f0955d52272f57755f0ff4dbc56721fdc2ef51
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-on: https://review.gerrithub.io/376037
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Target enumeration now uses separate poller to receive virtio
response messages. A special virtio_scsi_scan_base struct has
been added to keep track of how many targets we still have to
receive response from.
Making target scan async allows other pollers to run while
bdev_virtio still has to wait for a response.
Change-Id: Ia9af9d61fb4f880d0535df0b18aa443fff6dc9be
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/375132
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
In preparations to make it asynchronous.
Change-Id: Iab651974841d83cf36b8e050e3905638f88ad992
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/375729
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
I/O requests are now allocated from bdev_io memory.
virtio_req->iov now points to raw payload, request and response
iovectors are available as separate fields. This solution
should apply for both vhost-scsi and blk.
Change-Id: I588fbdd7fc5442329aadbcb3e31b2f4a7118ec8f
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/375264
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Fixed various minor bugs and removed unused code.
Change-Id: I24d3f10a494b9f9c69f45e888c7e1511adc268bc
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/375004
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Supports both PCI mode (for usage in guest VMs) and
vhost-user mode (for usage in host processes). The rte_virtio
subdirectory contains a lot of code lifted from the DPDK
virtio-net driver. Most of the PCI and vhost-user code is
reused almost exactly as-is, but the virtio code is drastically
rewritten as the DPDK code was very network specific.
Has been lightly tested with both the bdevio and bdevperf
applications in both PCI and vhost-user modes.
Still quite a bit of work needed - a list of todo
items is included in a README in the module's directory.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I85989d3de9ea89a87b719ececdb6d2ac16b77f53
Reviewed-on: https://review.gerrithub.io/374519
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
