May 2022 - Linuxarm - mailweb.openeuler.org

[RFCv6 PATCH net-next 00/19] net: extend the type of netdev_features_t to bitmap
by Jian Shen 21 Jul '22

21 Jul '22

For the prototype of netdev_features_t is u64, and the number of netdevice feature bits is 64 now. So there is no space to introduce new feature bit. This patchset try to solve it by change the prototype of netdev_features_t from u64 to structure below: typedef struct { DECLARE_BITMAP(bits, NETDEV_FEATURE_COUNT); } netdev_features_t; With this change, it's necessary to introduce a set of bitmap operation helpers for netdev features. As the nic drivers are not supposed to modify netdev_features directly, it also introduces wrappers helpers to this. [patch 1] To avoid mistake using NETIF_F_XXX as NETIF_F_XXX_BIT as input macroes for above helpers, remove all the macroes of NETIF_F_XXX. [patch 19] The features group macroes in netdev_features.h are replaced by a set of const features defined in netdev_features.c. [patch 2-3] For example: macro NETIF_F_ALL_TSO is replaced by netdev_all_tso_features There are some drivers(e.g. sfc) use netdev_features in global structure initialization. Changed the its netdev_features_t memeber to netdev_features_t *, and make it prefer to a netdev_features_t global variables. [patch 4] As suggestion from Andrew Lunn, I wrote some semantic patches to do the work(replacing the netdev features operator by helpers). [patch 7-18] To make the semantic patches simple, I split the complex opreation of netdev_features to simple logical operation. [patch 5, 6] With the prototype is no longer u64, the implementation of print interface for netdev features(%pNF) is changed to bitmap. [patch 19] The whole work is not complete yet. I just use these changes on several files(hns3 driver, sfc drivers, net/ethtool, net/core/dev.c), in order to show how these helpers will be used. I will apply these helpers to the whole tree later, sofar I want to get more suggestions for this scheme, any comments would be appreciated. The former discussion please see [1][2][3][4]. [1]:https://www.spinics.net/lists/netdev/msg769952.html [2]:https://www.spinics.net/lists/netdev/msg777764.html [3]:https://lore.kernel.org/netdev/20211107101519.29264-1-shenjian15@huawei.… [4]:https://www.spinics.net/lists/netdev/msg809293.html ChangeLog: V5-V6: suggestions from Jakub Kicinski: drop the rename for netdev->features simplify names of some helpers, and move them to a new header file refine the implement for netdev_features_set_array V4->V5: adjust the patch structure, use semantic patch with coccinelle V3->V4: rename netdev->features to netdev->active_features remove helpes for handle first 64 bits remove __NETIF_F(name) macroes replace features group macroes with const features V2->V3: use structure for bitmap, suggest by Edward Cree V1->V2: Extend the prototype from u64 to bitmap, suggest by Andrew Lunn Jian Shen (19): net: introduce operation helpers for netdev features net: replace general features macroes with global netdev_features variables net: replace multiple feature bits with netdev features array net: sfc: replace const features initialization with netdev features array net: simplify the netdev features expression net: adjust variables definition for netdev_features_t net: use netdev_feature_add helpers net: use netdev_features_or helpers net: use netdev_features_xor helpers net: use netdev_feature_del helpers net: use netdev_features_andnot helpers net: use netdev_feature_test helpers net: use netdev_features_intersects helpers net: use netdev_features_and helpers net: use netdev_features_subset helpers net: use netdev_features_equal helpers net: use netdev_features_copy helpers net: use netdev_xxx_features helpers net: redefine the prototype of netdev_features_t .../net/ethernet/hisilicon/hns3/hns3_enet.c | 108 ++- .../ethernet/hisilicon/hns3/hns3_ethtool.c | 4 +- .../net/ethernet/netronome/nfp/nfp_net_repr.c | 1 + drivers/net/ethernet/sfc/ef10.c | 38 +- drivers/net/ethernet/sfc/ef100_nic.c | 48 +- drivers/net/ethernet/sfc/ef100_rx.c | 4 +- drivers/net/ethernet/sfc/ef100_tx.c | 8 +- drivers/net/ethernet/sfc/ef10_sriov.c | 6 +- drivers/net/ethernet/sfc/efx.c | 82 ++- drivers/net/ethernet/sfc/efx_common.c | 31 +- drivers/net/ethernet/sfc/falcon/efx.c | 67 +- drivers/net/ethernet/sfc/falcon/efx.h | 3 + drivers/net/ethernet/sfc/falcon/falcon.c | 4 +- drivers/net/ethernet/sfc/falcon/net_driver.h | 5 +- drivers/net/ethernet/sfc/falcon/rx.c | 4 +- drivers/net/ethernet/sfc/farch.c | 2 +- drivers/net/ethernet/sfc/mcdi_filters.c | 13 +- drivers/net/ethernet/sfc/mcdi_port_common.c | 2 +- drivers/net/ethernet/sfc/net_driver.h | 5 +- drivers/net/ethernet/sfc/rx.c | 2 +- drivers/net/ethernet/sfc/rx_common.c | 4 +- drivers/net/ethernet/sfc/rx_common.h | 4 + drivers/net/ethernet/sfc/siena.c | 3 +- drivers/net/wireguard/device.c | 10 +- include/linux/netdev_features.h | 193 ++---- include/linux/netdev_features_helper.h | 653 ++++++++++++++++++ include/linux/netdevice.h | 109 +-- lib/vsprintf.c | 11 +- net/8021q/vlan_dev.c | 1 + net/core/Makefile | 2 +- net/core/dev.c | 389 +++++++---- net/core/netdev_features.c | 241 +++++++ net/ethtool/features.c | 90 +-- net/ethtool/ioctl.c | 135 ++-- 34 files changed, 1723 insertions(+), 559 deletions(-) create mode 100644 include/linux/netdev_features_helper.h create mode 100644 net/core/netdev_features.c -- 2.33.0

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Re: [PATCH 1/2] libhns: Add debug and error prints
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17 May '22

On 2022/5/14 16:31, liuyixing (A) wrote: > > 在 2022/5/14 16:11, Chengchang Tang 写道: >> Use the new verbs logging API to allow for easier debugging of >> application failures. >> >> Signed-off-by: Chengchang Tang <tangchengchang(a)huawei.com> >> --- >> providers/hns/hns_roce_u.c | 4 +- >> providers/hns/hns_roce_u_db.c | 7 +- >> providers/hns/hns_roce_u_verbs.c | 207 +++++++++++++++++++++++++------ >> 3 files changed, 178 insertions(+), 40 deletions(-) >> >> diff --git a/providers/hns/hns_roce_u.c b/providers/hns/hns_roce_u.c >> index a46ceb9d..3d1f493b 100644 >> --- a/providers/hns/hns_roce_u.c >> +++ b/providers/hns/hns_roce_u.c >> @@ -114,8 +114,10 @@ static struct verbs_context >> *hns_roce_alloc_context(struct ibv_device *ibdev, >> return NULL; >> if (ibv_cmd_get_context(&context->ibv_ctx, &cmd, sizeof(cmd), >> - &resp.ibv_resp, sizeof(resp))) >> + &resp.ibv_resp, sizeof(resp))) { >> + verbs_err(&context->ibv_ctx, "ibv_cmd_get_context failed\n"); >> goto err_free; >> + } >> >> return ret; >> + } >> hns_roce_clear_srq(ctx, srq->srqn); >> } >> @@ -1426,8 +1554,11 @@ int hns_roce_u_destroy_ah(struct ibv_ah *ah) >> int ret; >> ret = ibv_cmd_destroy_ah(ah); >> - if (ret) >> + if (ret) { >> + verbs_err(verbs_get_ctx(ah->context), >> + "Failed to create AH, ret = %d\n", ret); >> return ret; >> + } >> free(to_hr_ah(ah)); > > . Any comments?

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