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porting: update for new env library API

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Change-Id: If0af5f10e1143c7d02b5275f0f9b36a13ec0c312
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
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Daniel Verkamp 2016-11-01 14:17:23 -07:00
parent e5a7da08c4
commit c4b80ef36e
1 changed files with 9 additions and 8 deletions
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PORTING.md
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SPDK Porting Guide
==================
SPDK is ported to new environments by implementing the nvme_impl
interface. The nvme_impl interface provides APIs for the driver
SPDK is ported to new environments by implementing the *env*
library interface. The *env* interface provides APIs for drivers
to allocate physically contiguous and pinned memory, perform PCI
operations (config cycles and mapping BARs), virtual to physical
address translation and allocating per I/O data structures.
address translation and managing memory pools. The *env* API is
defined in `[include/spdk/env.h](include/spdk/env.h)`.
SPDK includes a default implementation of the nvme_impl API based
on the Data Plane Development Kit ([DPDK](dpdk.org)). This DPDK
implementation can be found in lib/nvme/nvme_impl.h. DPDK is
SPDK includes a default implementation of the *env* library based
on the Data Plane Development Kit ([DPDK](http://dpdk.org/)).
This DPDK implementation can be found in `lib/env`. DPDK is
currently supported on Linux and FreeBSD only.
Users who want to use SPDK on other operating system, or in
userspace driver frameworks other than DPDK, will need to implement
a new version of nvme_impl.h. The new nvme_impl.h can be
a new version of the *env* library. The new implementation can be
integrated into the SPDK build by updating the following line
in CONFIG:
CONFIG_NVME_IMPL=nvme_impl.h
CONFIG_ENV?=$(SPDK_ROOT_DIR)/lib/env