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Date: Fri, 21 Jul 2023 17:20:52 +0800
From: Junxian Huang <huangjunxian6@...ilicon.com>
To: <jgg@...dia.com>, <leon@...nel.org>
CC: <linux-rdma@...r.kernel.org>, <linuxarm@...wei.com>,
<linux-kernel@...r.kernel.org>, <huangjunxian6@...ilicon.com>
Subject: [PATCH v4 for-next] RDMA/core: Get IB width and speed from netdev
From: Haoyue Xu <xuhaoyue1@...ilicon.com>
Previously, there was no way to query the number of lanes for a network
card, so the same netdev_speed would result in a fixed pair of width and
speed. As network card specifications become more diverse, such fixed
mode is no longer suitable, so a method is needed to obtain the correct
width and speed based on the number of lanes.
This patch retrieves netdev lanes and speed from net_device and
translates them to IB width and speed.
Signed-off-by: Haoyue Xu <xuhaoyue1@...ilicon.com>
Signed-off-by: Luoyouming <luoyouming@...wei.com>
Signed-off-by: Junxian Huang <huangjunxian6@...ilicon.com>
---
drivers/infiniband/core/verbs.c | 100 +++++++++++++++++++++++++-------
1 file changed, 79 insertions(+), 21 deletions(-)
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index b99b3cc283b6..25367bd6dd97 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1880,6 +1880,80 @@ int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr,
}
EXPORT_SYMBOL(ib_modify_qp_with_udata);
+static void ib_get_width_and_speed(u32 netdev_speed, u32 lanes,
+ u16 *speed, u8 *width)
+{
+ if (!lanes) {
+ if (netdev_speed <= SPEED_1000) {
+ *width = IB_WIDTH_1X;
+ *speed = IB_SPEED_SDR;
+ } else if (netdev_speed <= SPEED_10000) {
+ *width = IB_WIDTH_1X;
+ *speed = IB_SPEED_FDR10;
+ } else if (netdev_speed <= SPEED_20000) {
+ *width = IB_WIDTH_4X;
+ *speed = IB_SPEED_DDR;
+ } else if (netdev_speed <= SPEED_25000) {
+ *width = IB_WIDTH_1X;
+ *speed = IB_SPEED_EDR;
+ } else if (netdev_speed <= SPEED_40000) {
+ *width = IB_WIDTH_4X;
+ *speed = IB_SPEED_FDR10;
+ } else {
+ *width = IB_WIDTH_4X;
+ *speed = IB_SPEED_EDR;
+ }
+
+ return;
+ }
+
+ switch (lanes) {
+ case 1:
+ *width = IB_WIDTH_1X;
+ break;
+ case 2:
+ *width = IB_WIDTH_2X;
+ break;
+ case 4:
+ *width = IB_WIDTH_4X;
+ break;
+ case 8:
+ *width = IB_WIDTH_8X;
+ break;
+ case 12:
+ *width = IB_WIDTH_12X;
+ break;
+ default:
+ *width = IB_WIDTH_1X;
+ }
+
+ switch (netdev_speed / lanes) {
+ case SPEED_2500:
+ *speed = IB_SPEED_SDR;
+ break;
+ case SPEED_5000:
+ *speed = IB_SPEED_DDR;
+ break;
+ case SPEED_10000:
+ *speed = IB_SPEED_FDR10;
+ break;
+ case SPEED_14000:
+ *speed = IB_SPEED_FDR;
+ break;
+ case SPEED_25000:
+ *speed = IB_SPEED_EDR;
+ break;
+ case SPEED_50000:
+ *speed = IB_SPEED_HDR;
+ break;
+ case SPEED_100000:
+ *speed = IB_SPEED_NDR;
+ break;
+ default:
+ *speed = IB_SPEED_SDR;
+ }
+}
+
int ib_get_eth_speed(struct ib_device *dev, u32 port_num, u16 *speed, u8 *width)
{
int rc;
@@ -1904,29 +1978,13 @@ int ib_get_eth_speed(struct ib_device *dev, u32 port_num, u16 *speed, u8 *width)
netdev_speed = lksettings.base.speed;
} else {
netdev_speed = SPEED_1000;
- pr_warn("%s speed is unknown, defaulting to %u\n", netdev->name,
- netdev_speed);
+ if (rc)
+ pr_warn("%s speed is unknown, defaulting to %u\n",
+ netdev->name, netdev_speed);
}
- if (netdev_speed <= SPEED_1000) {
- *width = IB_WIDTH_1X;
- *speed = IB_SPEED_SDR;
- } else if (netdev_speed <= SPEED_10000) {
- *width = IB_WIDTH_1X;
- *speed = IB_SPEED_FDR10;
- } else if (netdev_speed <= SPEED_20000) {
- *width = IB_WIDTH_4X;
- *speed = IB_SPEED_DDR;
- } else if (netdev_speed <= SPEED_25000) {
- *width = IB_WIDTH_1X;
- *speed = IB_SPEED_EDR;
- } else if (netdev_speed <= SPEED_40000) {
- *width = IB_WIDTH_4X;
- *speed = IB_SPEED_FDR10;
- } else {
- *width = IB_WIDTH_4X;
- *speed = IB_SPEED_EDR;
- }
+ ib_get_width_and_speed(netdev_speed, lksettings.lanes,
+ speed, width);
return 0;
}
--
2.30.0
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