The ioat library currently only supports DMA copy operations, but the
hardware can do other types of transfers. Add a union of the hardware
descriptor structures to enable support for the other operations in the
future.
Also add a generic hardware descriptor type to allow access to the parts
of the descriptor that are common between all types.
Change-Id: I3b54421ce771f58b78910e790b53026f311f918e
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
According to the specification, the dataset management for deallocate
attribute can support to 256 ranges, so we should use uint16_t
instead of uint8_t as the ranges parameter.
Change-Id: Ibacc00da8b4b9e2b2f3454d382aadf7ad353ff31
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Add support for the full set of Optional NVM Command Support bits from
NVMe 1.2, and interpret the various SGL-related feature bits.
Change-Id: Ie3fcca27571b5236479e05a1ea3b834adbeb18a8
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This lets us signal an error if the channel is halted in
ioat_process_channel_events().
Change-Id: Iffaf4fd1e27d1254f9d95a37d732ae4a5f3a0465
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
NVMe doesn't require the specific 64-bit MMIO ordering on 32-bit
platforms performed in spdk_mmio_read_8(), but it doesn't hurt.
We have to pick one of the two possible orderings, so pick the one
required by I/OAT.
Change-Id: I2b909d64d0c077b797d0f64a11d78d1ecc55eec7
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
The ioat driver supports DMA engine copy offload hardware available on
Intel Xeon platforms.
Change-Id: Ida0b17b25816576948ddb1b0443587e0f09574d4
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
nvme_ctrlr_process_io_completions() now takes a second parameter,
max_completions, to let the user limit the number of I/Os completed on
each poll.
If there are many I/Os waiting to be completed, the
nvme_ctrlr_process_io_completions() function could run for a long time
before returning control to the user, so the max_completions parameter
lets the user have more control of latency.
Change-Id: I3173059d94ec1cc5dbb636fc0ffd3dc09f3bfe4b
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Like sprintf() with automatic buffer allocation.
This should help to avoid fixed-size buffers in
non-performance-sensitive code that formats strings.
Change-Id: I35209ae84014ed5daf41baa5b03af8a5f6b02b8e
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This helps enable FreeBSD, where pciaccess pci_device_has_kernel_driver()
is not functional. The function will return 0 if there is no driver
attached, or the Linux uio or FreeBSD nic_uio driver is attached. It will
return 1 otherwise.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I0921e61c9040b1e0411b5dc40b36fc7f2721c8c5
Then only include this new file on Linux, to help enable building
SPDK on FreeBSD.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Id818a2d8662c95e603d8b580f1f4b92889cc626e
