Hi Jan, > -----Original Message----- > From: Jan Viktorin [mailto:viktorin at rehivetech.com] > Sent: Thursday, September 01, 2016 11:59 PM > To: Shreyansh Jain <shreyansh.jain at nxp.com> > Cc: dev at dpdk.org; david.marchand at 6wind.com; thomas.monjalon at > 6wind.com; Hemant > Agrawal <hemant.agrawal at nxp.com> > Subject: Re: [PATCH v8 00/25] Introducing rte_driver/rte_device generalization > > Hi Shreyansh, > > I am sorry to be quiet on this thread. I am traveling in those > two weeks and have some vacation. However, I passively follow the > conversation. Thank you for your work so far!
No issues. Thanks for your help. > > Regards > Jan > > On Fri, 26 Aug 2016 19:26:38 +0530 > Shreyansh Jain <shreyansh.jain at nxp.com> wrote: > > > Based on master (e22856313fff2) > > > > Background: > > =========== > > > > It includes two different patch-sets floated on ML earlier: > > * Original patch series is from David Marchand [1], [2]. > > `- This focused mainly on PCI (PDEV) part > > `- v7 of this was posted by me [8] in August/2016 > > * Patch series [4] from Jan Viktorin > > `- This focused on VDEV and rte_device integration > > > > Introduction: > > ============= > > > > This patch series introduces a generic device model, moving away from PCI > > centric code layout. Key change is to introduce rte_driver/rte_device > > structures at the top level which are inherited by > > rte_XXX_driver/rte_XXX_device - where XXX belongs to {pci, vdev, soc (in > > future),...}. > > > > Key motivation for this series is to move away from PCI centric design of > > EAL to a more hierarchical device model - pivoted around a generic driver > > and device. Each specific driver and device can inherit the common > > properties of the generic set and build upon it through driver/device > > specific functions. > > > > Earlier, the EAL device initialization model was: > > (Refer: [3]) > > > > -- > > Constructor: > > |- PMD_DRIVER_REGISTER(rte_driver) > > `- insert into dev_driver_list, rte_driver object > > > > rte_eal_init(): > > |- rte_eal_pci_init() > > | `- scan and fill pci_device_list from sysfs > > | > > |- rte_eal_dev_init() > > | `- For each rte_driver in dev_driver_list > > | `- call the rte_driver->init() function > > | |- PMDs designed to call rte_eth_driver_register(eth_driver) > > | |- eth_driver have rte_pci_driver embedded in them > > | `- rte_eth_driver_register installs the > > | rte_pci_driver->devinit/devuninit callbacks. > > | > > |- rte_eal_pci_probe() > > | |- For each device detected, dev_driver_list is parsed and matching is > > | | done. > > | |- For each matching device, the rte_pci_driver->devinit() is called. > > | |- Default map is to rte_eth_dev_init() which in turn creates a > > | | new ethernet device (eth_dev) > > | | `- eth_drv->eth_dev_init() is called which is implemented by > > `--| individual PMD drivers. > > > > -- > > > > The structure of driver looks something like: > > > > +------------+ ._____. > > | rte_driver <-----| PMD |___ > > | .init | `-----` \ > > +----.-------+ | \ > > `-. | What PMD actually is > > \ | | > > +----------v----+ | > > | eth_driver | | > > | .eth_dev_init | | > > +----.----------+ | > > `-. | > > \ | > > +------------v---+ > > | rte_pci_driver | > > | .pci_devinit | > > +----------------+ > > > > and all devices are part of a following linked lists: > > - dev_driver_list for all rte_drivers > > - pci_device_list for all devices, whether PCI or VDEV > > > > > > From the above: > > * a PMD initializes a rte_driver, eth_driver even though actually it is a > > pci_driver > > * initialization routines are passed from > > rte_driver->pci_driver->eth_driver > > even though they should ideally be rte_eal_init()->rte_pci_driver() > > * For a single driver/device type model, this is not necessarily a > > functional issue - but more of a design language. > > * But, when number of driver/device type increase, this would create > > problem > > in how driver<=>device links are represented. > > > > Proposed Architecture: > > ====================== > > > > A nice representation has already been created by David in [3]. Copying that > > here: > > > > +------------------+ +-------------------------------+ > > | | | | > > | rte_pci_device | | rte_pci_driver | > > | | | | > > +-------------+ | +--------------+ | | +---------------------------+ | > > | | | | | | | | | | > > | rte_eth_dev +---> rte_device +-----> rte_driver | | > > | | | | char name[] | | | | char name[] | | > > +-------------+ | | | | | | int init(rte_device *) | | > > | +--------------+ | | | int uninit(rte_device *) | | > > | | | | | | > > +------------------+ | +---------------------------+ | > > | | > > +-------------------------------+ > > > > - for ethdev on top of vdev devices > > > > +------------------+ +-------------------------------+ > > | | | | > > | drv specific | | rte_vdev_driver | > > | | | | > > +-------------+ | +--------------+ | | +---------------------------+ | > > | | | | | | | | | | > > | rte_eth_dev +---> rte_device +-----> rte_driver | | > > | | | | char name[] | | | | char name[] | | > > +-------------+ | | | | | | int init(rte_device *) | | > > | +--------------+ | | | int uninit(rte_device *) | | > > | | | | | | > > +------------------+ | +---------------------------+ | > > | | > > | int priv_size | > > | | > > +-------------------------------+ > > > > Representing from above, it would be: > > > > +--------------+ > > | rte_driver | > > | name | > > | <Future> | > > +------^-------+ pci_driver_list > > | / vdev_driver_list > > `---. <<Inherits>> / / > > |\____________/_______ / > > | / \ / > > +-----------/-----+ +--------/---------+ > > | rte_pci_driver | | rte_vdev_driver | > > | pci_devinit() | | vdev_devinit() | > > | pci_devuninit()| | vdev_devuninit()| > > | <more> | | <more> | > > +-----------------+ +------------------+ > > > > > > +--------------+ > > | rte_device | > > | name | > > | <Future> | > > +------^-------+ pci_device_list > > | / xxx_device_list > > `---. <<Inherits>> / / > > |\____________/________ / > > | / \ / > > +-----------/-----+ +--------/---------+ > > | rte_pci_device | | rte_xxx_device | > > | <dev data> | | <dev data> | > > | <flags/intr> | | <flags/intr> | > > | <more> | | <more> | > > +-----------------+ +------------------+ > > > > * Each driver type has its own structure which derives from the generic > > rte_driver structure. > > \- Each driver type maintains its own list, at the same time, rte_driver > > list also exists - so that *all* drivers can be looped on, if > > required. > > * Each device, associated with one or more drivers, has its own type > > derived from rte_device > > \- Each device _may_ maintain its own list (for example, in current > > implementation, vdev is not maintaining it). > > > > ==Introducing a new device/driver type implies== > > - creating their own rte_<xxx>.h file which contains the device/driver > > definitions. > > - defining the DRIVER_REGISTER_XXX helpers > > > > > > ==Hotplugging Support== > > - devices should be able to support attach/detach operations. > > - Earlier these functions were part of ethdev. They have been moved to eal > > to be more generic. > > > > > > About the Patches: > > ================== > > > > There are a large number of patches for this - primarily because the changes > > are quite varied and keeping them logically separate yet compilable is > > important. Most of the patches are small and those which are large touch the > > drivers (PMDs) to accommodate the structure changes: > > > > - Patches 0001~0003 are for introducing the container_of function (so that > > rte_device can be obtained from rte_pci_device, for example), and > > removing unused code. > > - Patches 0004~0007 just perform the ground work for enabling change from > > rte_driver/eth_driver based PMDs to rte_xxx_driver based PMDs > > - In patch 0008, all the pdev PMDs are changed to support rte_pci_driver ( > > including cryptodev, which is eventually generalized with PCI) > > - Patch 0009~0010 merge the crypto and pci functions for registration and > > naming. > > - Patches 0011~0014 deal with hotplugging - hotplug no more invokes scan of > > complete bus and has been generalized into EAl from ethdev. > > - Patches 0015 introduces vdev init/uninit into separate C units and > > enables its compilation. Patch 0016~0017 build on it and remove the > > remaining legacy support for vdev/pdev distinctions. > > - Patches 0018~0022 enable the vdev drivers to register using the > > DRIVER_REGISTER_* operations, and remove their rte_driver->init() > > - Patch 0023 enables the rte_driver registration into a common driver > > linked list. > > - Patches 0024~0025 introduce the rte_device, a generalization of > > rte_xxx_device, and associated operation of creating rte_device linked > > list. It also enables the drivers to use rte_device.name/numa_node > > members rather than rte_xxx_device specific members. > > > > Notes: > > ====== > > > > * Some sign-off were already provided by Jan on the original v5; But, as a > > large number of merges have been made, I am leaving those out just in case > > it is not sync with initial understanding. > > > > * This might not be in-sync with pmdinfogen as PMD_REGISTER_DRIVER is > > removed [7]. > > > > References: > > =========== > > > > [1] http://dpdk.org/ml/archives/dev/2016-January/032387.html > > [2] http://dpdk.org/ml/archives/dev/2016-April/037686.html > > [3] http://dpdk.org/ml/archives/dev/2016-January/031390.html > > [4] http://dpdk.org/ml/archives/dev/2016-July/043645.html > > [5] http://dpdk.org/ml/archives/dev/2016-June/042439.html > > [6] http://dpdk.org/ml/archives/dev/2016-June/042444.html > > [7] http://dpdk.org/ml/archives/dev/2016-July/043172.html > > [8] http://dpdk.org/ml/archives/dev/2016-August/044941.html > > > > Changes since v7: > > - Rebase over master (e22856313fff2) > > - Merge the patch series by David [1][2] and Jan [4] into a single set > > hereafter, PCI and VDEV, both are re-factored for rte_device/driver model > > > > Changes since v6: > > - rebase over 16.07 (b0a1419) > > - DRIVER_REGISTER_PCI macro is now passed pci_drv rather than drv > > - review comments regarding missing information in log messages > > - new API additions to 16.11 map objects > > - review comment in [5] and [7] are not included in this series. > > > > Changes since v5: > > - Rebase over master (11c5e45d8) > > - Rename RTE_EAL_PCI_REGISTER helper macro to DRIVER_REGISTER_PCI to be in > > sync > > with DRIVER_REGISTER_PCI_TABLE. [Probably, in future, both can be merged] > > - Modifications to bnxt and thunderx driver PMD registration files for > > using the simplified PCI device registration helper macro > > > > Changes since v4: > > - Fix compilation issue after rebase on HEAD (913154e) in previous series > > - Retain rte_eth_dev_get_port_by_name and rte_eth_dev_get_name_by_port which > > were removed by previous patchset. These are being used by pdump library > > > > Changes since v3: > > - rebase over HEAD (913154e) > > - Update arguments to RTE_EAL_PCI_REGISTER macro as per Jan's suggestion > > - modify qede driver to use RTE_EAL_PCI_REGISTER > > - Argument check in hotplug functions > > > > Changes since v2: > > - rebase over HEAD (d76c193) > > - Move SYSFS_PCI_DRIVERS macro to rte_pci.h to avoid compilation issue > > > > Changes since v1: > > - rebased on HEAD, new drivers should be okay > > - patches have been split into smaller pieces > > - RTE_INIT macro has been added, but in the end, I am not sure it is useful > > - device type has been removed from ethdev, as it was used only by hotplug > > - getting rid of pmd type in eal patch (patch 5 of initial series) has been > > dropped for now, we can do this once vdev drivers have been converted > > > > Shreyansh Jain (25): > > eal: define macro container_of > > eal: remove duplicate function declaration > > pci: no need for dynamic tailq init > > crypto: no need for a crypto pmd type > > drivers: align pci driver definitions > > eal: introduce init macros > > driver: init/uninit common wrappers for PCI drivers > > drivers: convert all pdev drivers as pci drivers > > driver: Remove driver register callbacks for crypto/net > > eal/pci: Helpers for device name parsing/update > > ethdev: do not scan all pci devices on attach > > eal: add hotplug operations for pci and vdev > > ethdev: convert to eal hotplug > > ethdev: get rid of device type > > eal: extract vdev infra > > eal: Remove PDEV/VDEV unused code > > drivers: convert PMD_VDEV drivers to use rte_vdev_driver > > eal: move init/uninit to rte_vdev_driver > > eal: remove PMD_DRIVER_REGISTER and unused pmd_types > > eal: rte_pci.h includes rte_dev.h > > eal: rename and move rte_pci_resource > > eal/pci: inherit rte_driver by rte_pci_driver > > eal: call rte_eal_driver_register > > eal: introduce rte_device > > eal/pci: Create rte_device list and fallback on its members > > > > app/test/test_pci.c | 10 +- > > app/test/virtual_pmd.c | 8 +- > > drivers/crypto/aesni_gcm/aesni_gcm_pmd.c | 7 +- > > drivers/crypto/aesni_mb/rte_aesni_mb_pmd.c | 7 +- > > drivers/crypto/kasumi/rte_kasumi_pmd.c | 7 +- > > drivers/crypto/null/null_crypto_pmd.c | 7 +- > > drivers/crypto/qat/qat_qp.c | 2 +- > > drivers/crypto/qat/rte_qat_cryptodev.c | 18 +- > > drivers/crypto/snow3g/rte_snow3g_pmd.c | 7 +- > > drivers/net/af_packet/rte_eth_af_packet.c | 11 +- > > drivers/net/bnx2x/bnx2x_ethdev.c | 36 +-- > > drivers/net/bnxt/bnxt_ethdev.c | 17 +- > > drivers/net/bonding/rte_eth_bond_api.c | 2 +- > > drivers/net/bonding/rte_eth_bond_pmd.c | 9 +- > > drivers/net/cxgbe/cxgbe_ethdev.c | 25 +-- > > drivers/net/cxgbe/cxgbe_main.c | 2 +- > > drivers/net/cxgbe/sge.c | 7 +- > > drivers/net/e1000/em_ethdev.c | 17 +- > > drivers/net/e1000/igb_ethdev.c | 41 +--- > > drivers/net/ena/ena_ethdev.c | 20 +- > > drivers/net/enic/enic_ethdev.c | 24 +- > > drivers/net/fm10k/fm10k_ethdev.c | 30 +-- > > drivers/net/i40e/i40e_ethdev.c | 31 +-- > > drivers/net/i40e/i40e_ethdev_vf.c | 26 +-- > > drivers/net/i40e/i40e_fdir.c | 2 +- > > drivers/net/ixgbe/ixgbe_ethdev.c | 48 +--- > > drivers/net/mlx4/mlx4.c | 21 +- > > drivers/net/mlx5/mlx5.c | 20 +- > > drivers/net/mpipe/mpipe_tilegx.c | 18 +- > > drivers/net/nfp/nfp_net.c | 28 +-- > > drivers/net/null/rte_eth_null.c | 11 +- > > drivers/net/pcap/rte_eth_pcap.c | 11 +- > > drivers/net/qede/qede_ethdev.c | 42 +--- > > drivers/net/ring/rte_eth_ring.c | 11 +- > > drivers/net/szedata2/rte_eth_szedata2.c | 28 +-- > > drivers/net/thunderx/nicvf_ethdev.c | 21 +- > > drivers/net/vhost/rte_eth_vhost.c | 11 +- > > drivers/net/virtio/virtio_ethdev.c | 28 +-- > > drivers/net/virtio/virtio_pci.c | 5 +- > > drivers/net/virtio/virtio_user_ethdev.c | 10 +- > > drivers/net/vmxnet3/vmxnet3_ethdev.c | 27 +-- > > drivers/net/vmxnet3/vmxnet3_rxtx.c | 2 +- > > drivers/net/xenvirt/rte_eth_xenvirt.c | 9 +- > > examples/ip_pipeline/init.c | 22 -- > > lib/librte_cryptodev/rte_cryptodev.c | 71 ++---- > > lib/librte_cryptodev/rte_cryptodev.h | 2 - > > lib/librte_cryptodev/rte_cryptodev_pmd.h | 45 ++-- > > lib/librte_cryptodev/rte_cryptodev_version.map | 8 +- > > lib/librte_eal/bsdapp/eal/Makefile | 1 + > > lib/librte_eal/bsdapp/eal/eal_pci.c | 54 ++++- > > lib/librte_eal/bsdapp/eal/rte_eal_version.map | 7 + > > lib/librte_eal/common/Makefile | 2 +- > > lib/librte_eal/common/eal_common_dev.c | 95 ++++---- > > lib/librte_eal/common/eal_common_pci.c | 34 ++- > > lib/librte_eal/common/eal_common_vdev.c | 106 +++++++++ > > lib/librte_eal/common/eal_private.h | 20 +- > > lib/librte_eal/common/include/rte_common.h | 16 ++ > > lib/librte_eal/common/include/rte_dev.h | 77 +++++-- > > lib/librte_eal/common/include/rte_eal.h | 3 + > > lib/librte_eal/common/include/rte_pci.h | 53 +++-- > > lib/librte_eal/common/include/rte_tailq.h | 4 +- > > lib/librte_eal/common/include/rte_vdev.h | 96 ++++++++ > > lib/librte_eal/linuxapp/eal/Makefile | 1 + > > lib/librte_eal/linuxapp/eal/eal.c | 1 + > > lib/librte_eal/linuxapp/eal/eal_pci.c | 23 +- > > lib/librte_eal/linuxapp/eal/rte_eal_version.map | 10 + > > lib/librte_ether/rte_ethdev.c | 280 > > +++++------------------ > - > > lib/librte_ether/rte_ethdev.h | 40 ++-- > > lib/librte_ether/rte_ether_version.map | 9 + > > 69 files changed, 784 insertions(+), 1020 deletions(-) > > create mode 100644 lib/librte_eal/common/eal_common_vdev.c > > create mode 100644 lib/librte_eal/common/include/rte_vdev.h > > > > > > -- > Jan Viktorin E-mail: Viktorin at RehiveTech.com > System Architect Web: www.RehiveTech.com > RehiveTech > Brno, Czech Republic