This patch set introduces a generic ethdev cache stash framework, provides PCIe TPH (Transaction Processing Hints) implementation on PCI/VFIO bus, enables TPH cache stash support for e1000/igb PMD, and adds testpmd command line configuration.
The patchset is organized as follows: - Patch 1/4: bus/pci: introduce PCIe TPH support Add generic PCIe TPH APIs and VFIO backend implementation, with stub implementations for BSD and Windows. - Patch 2/4: ethdev: introduce generic cache stash API Define unified cache stash capability/operation/config abstraction, support device-level and per-queue stash management. - Patch 3/4: net/e1000: add cache stash support via TPH Implement ethdev cache stash ops for igb PMD based on PCIe TPH. - Patch 4/4: app/testpmd: add TPH stash objects configuration Add testpmd CLI option to configure stash objects and automatically apply stash enable/disable on forwarding start/stop. Note: 1. This implementation references the Linux kernel VFIO TPH uapi series (v8 version), which is not yet merged upstream: https://lore.kernel.org/all/[email protected]/ 2. The API design and cache stash model learn from the prior work by Wathsala Vithanage: "An API for Cache Stashing with TPH". 3. The e1000/igb PMD is enabled as the first user of this API because it is the only PCIe TPH capable hardware available for testing at this time. The generic API design is extensible to other NICs and future cache stash mechanisms. Chengwen Feng (4): bus/pci: introduce PCIe TPH support ethdev: introduce generic cache stash API net/e1000: add cache stash support via TPH app/testpmd: add TPH stash objects configuration app/test-pmd/parameters.c | 20 ++ app/test-pmd/testpmd.c | 81 +++++++ app/test-pmd/testpmd.h | 1 + drivers/bus/pci/bsd/pci.c | 50 +++++ drivers/bus/pci/linux/pci.c | 48 +++++ drivers/bus/pci/linux/pci_init.h | 9 + drivers/bus/pci/linux/pci_vfio.c | 272 ++++++++++++++++++++++++ drivers/bus/pci/rte_bus_pci.h | 112 ++++++++++ drivers/bus/pci/windows/pci.c | 50 +++++ drivers/net/intel/e1000/base/e1000_hw.h | 2 + drivers/net/intel/e1000/base/e1000_vf.h | 2 + drivers/net/intel/e1000/igb_ethdev.c | 221 +++++++++++++++++++ lib/ethdev/ethdev_driver.h | 37 ++++ lib/ethdev/rte_ethdev.c | 40 ++++ lib/ethdev/rte_ethdev.h | 95 +++++++++ 15 files changed, 1040 insertions(+) -- 2.17.1
