87 lines
3.4 KiB
Diff
87 lines
3.4 KiB
Diff
From 1640688018f329559c61352646f283f98938af31 Mon Sep 17 00:00:00 2001
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From: Cole Helbling <cole.helbling@determinate.systems>
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Date: Thu, 16 Feb 2023 09:30:21 -0800
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Subject: [PATCH] Revert "RDMA/irdma: Report the correct link speed"
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This reverts commit 425c9bd06b7a70796d880828d15c11321bdfb76d.
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Some Equinix Metal instances, such as a3.large.x86, m3.large.x86
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(specific hardware revisions), and n3.large.x86, use the `ice` kernel
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driver for their network cards, in conjunction with bonded devices.
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However, this commit caused a regression where these bonded devices
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would deadlock. This was initially reported by Jaroslav Pulchart on
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the netdev mailing list[1], and there were follow-up patches from Dave
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Ertman[2][3] that attempted to fix this but were not up to snuff for
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various reasons[4].
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Specifically, v2 of the patch ([3]) appears to fix the issue on some
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devices (tested with 8086:159B network cards), while it is still broken
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on others (such as an 8086:1593 network card).
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We revert the patch exposing the issue until upstream has a working
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solution in order to make Equinix Metal instances work reliably again.
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[1]: https://lore.kernel.org/netdev/CAK8fFZ6A_Gphw_3-QMGKEFQk=sfCw1Qmq0TVZK3rtAi7vb621A@mail.gmail.com/
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[2]: https://patchwork.ozlabs.org/project/intel-wired-lan/patch/20230111183145.1497367-1-david.m.ertman@intel.com/
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[3]: https://patchwork.ozlabs.org/project/intel-wired-lan/patch/20230215191757.1826508-1-david.m.ertman@intel.com/
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[4]: https://lore.kernel.org/netdev/cb31a911-ba80-e2dc-231f-851757cfd0b8@intel.com/T/#m6e53f8c43093693c10268140126abe99e082dc1c
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---
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drivers/infiniband/hw/irdma/verbs.c | 35 ++++++++++++++++++++++++++---
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1 file changed, 32 insertions(+), 3 deletions(-)
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diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
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index c5971a840b87..911902d2b93e 100644
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--- a/drivers/infiniband/hw/irdma/verbs.c
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+++ b/drivers/infiniband/hw/irdma/verbs.c
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@@ -60,6 +60,36 @@ static int irdma_query_device(struct ib_device *ibdev,
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return 0;
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}
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+/**
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+ * irdma_get_eth_speed_and_width - Get IB port speed and width from netdev speed
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+ * @link_speed: netdev phy link speed
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+ * @active_speed: IB port speed
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+ * @active_width: IB port width
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+ */
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+static void irdma_get_eth_speed_and_width(u32 link_speed, u16 *active_speed,
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+ u8 *active_width)
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+{
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+ if (link_speed <= SPEED_1000) {
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+ *active_width = IB_WIDTH_1X;
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+ *active_speed = IB_SPEED_SDR;
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+ } else if (link_speed <= SPEED_10000) {
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+ *active_width = IB_WIDTH_1X;
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+ *active_speed = IB_SPEED_FDR10;
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+ } else if (link_speed <= SPEED_20000) {
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+ *active_width = IB_WIDTH_4X;
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+ *active_speed = IB_SPEED_DDR;
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+ } else if (link_speed <= SPEED_25000) {
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+ *active_width = IB_WIDTH_1X;
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+ *active_speed = IB_SPEED_EDR;
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+ } else if (link_speed <= SPEED_40000) {
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+ *active_width = IB_WIDTH_4X;
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+ *active_speed = IB_SPEED_FDR10;
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+ } else {
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+ *active_width = IB_WIDTH_4X;
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+ *active_speed = IB_SPEED_EDR;
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+ }
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+}
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+
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/**
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* irdma_query_port - get port attributes
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* @ibdev: device pointer from stack
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@@ -87,9 +117,8 @@ static int irdma_query_port(struct ib_device *ibdev, u32 port,
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props->state = IB_PORT_DOWN;
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props->phys_state = IB_PORT_PHYS_STATE_DISABLED;
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}
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-
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- ib_get_eth_speed(ibdev, port, &props->active_speed,
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- &props->active_width);
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+ irdma_get_eth_speed_and_width(SPEED_100000, &props->active_speed,
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+ &props->active_width);
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if (rdma_protocol_roce(ibdev, 1)) {
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props->gid_tbl_len = 32;
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--
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2.39.0
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