Commit e4a79fd1 authored by Dariusz Stojaczyk's avatar Dariusz Stojaczyk Committed by Jim Harris
Browse files

dpdk/pci: support DPDK 18.08 write combined PCI resources 



We used to support it by default in our DPDK forks,
but starting with DPDK 18.08, a new PCI driver flag
RTE_PCI_DRV_WC_ACTIVATE is required.

We enable now it for NVMe and Virtio, but not for I/OAT,
as our I/OAT driver currently assumes strong memory
ordering, which prefetchable resources do not provide.

Change-Id: I1a13356e28535981153b3d3e52bfe9d66b6172af
Signed-off-by: default avatarDariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/422239


Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
parent 13eb81e1

lib/env_dpdk/pci_nvme.c

+5 −1
Original line number Diff line number Diff line
@@ -52,7 +52,11 @@ static struct rte_pci_id nvme_pci_driver_id[] = { 


static struct spdk_pci_enum_ctx g_nvme_pci_drv = {

	.driver = {

		.drv_flags	= RTE_PCI_DRV_NEED_MAPPING,

		.drv_flags	= RTE_PCI_DRV_NEED_MAPPING

#if RTE_VERSION >= RTE_VERSION_NUM(18, 8, 0, 0)

		| RTE_PCI_DRV_WC_ACTIVATE

#endif

		,

		.id_table	= nvme_pci_driver_id,

#if RTE_VERSION >= RTE_VERSION_NUM(16, 11, 0, 0)

		.probe		= spdk_pci_device_init,

lib/env_dpdk/pci_virtio.c

+5 −1
Original line number Diff line number Diff line
@@ -43,7 +43,11 @@ static struct rte_pci_id virtio_pci_driver_id[] = { 


static struct spdk_pci_enum_ctx g_virtio_pci_drv = {

	.driver = {

		.drv_flags	= RTE_PCI_DRV_NEED_MAPPING,

		.drv_flags	= RTE_PCI_DRV_NEED_MAPPING

#if RTE_VERSION >= RTE_VERSION_NUM(18, 8, 0, 0)

		| RTE_PCI_DRV_WC_ACTIVATE

#endif

		,

		.id_table	= virtio_pci_driver_id,

#if RTE_VERSION >= RTE_VERSION_NUM(16, 11, 0, 0)

		.probe		= spdk_pci_device_init,