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Message-ID: <20251217080605.38473-4-15927021679@163.com>
Date: Wed, 17 Dec 2025 16:05:13 +0800
From: 15927021679@....com
To: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
"David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Stanislav Fomichev <sdf@...ichev.me>
Cc: linux-kernel@...r.kernel.org,
netdev@...r.kernel.org,
xiongweimin <xiongweimin@...inos.cn>
Subject: [PATCH 02/14] examples/vhost_user_rdma: implement device and port query commands
From: xiongweimin <xiongweimin@...inos.cn>
Added RDMA control command handlers for:
- VHOST_RDMA_CTRL_ROCE_QUERY_DEVICE
- VHOST_RDMA_CTRL_ROCE_QUERY_PORT
Key features:
1. Device capability reporting:
- Maximum MR size and page size capabilities
- Queue Pair (QP) limits (max WR, SGE, CQE)
- Resource limits (MR, PD, AH counts)
- RDMA protocol capabilities
2. Port attribute reporting:
- GID table length and port state
- MTU settings (active, physical, maximum)
- Link speed and width capabilities
- Error counters and security attributes
3. Response validation:
- CHK_IOVEC macro ensures response buffer safety
- Fixed attribute values for standard RDMA v2 compliance
- Structured response formats matching IB specification
Signed-off-by: Xiong Weimin <xiongweimin@...inos.cn>
Change-Id: I17ac65a0801ebf5e0b0d83a50877004a54840365
---
examples/vhost_user_rdma/vhost_rdma_ib.c | 27 ++++++++++++
examples/vhost_user_rdma/vhost_rdma_ib.h | 56 +++++++++++++++++++++++-
2 files changed, 82 insertions(+), 1 deletion(-)
diff --git a/examples/vhost_user_rdma/vhost_rdma_ib.c b/examples/vhost_user_rdma/vhost_rdma_ib.c
index 5535a8696b..edb6e3fea3 100644
--- a/examples/vhost_user_rdma/vhost_rdma_ib.c
+++ b/examples/vhost_user_rdma/vhost_rdma_ib.c
@@ -537,12 +537,39 @@ vhost_rdma_query_device(struct vhost_rdma_device *dev, CTRL_NO_CMD,
return 0;
}
+static int
+vhost_rdma_query_port(__rte_unused struct vhost_rdma_device *dev,
+ CTRL_NO_CMD,
+ struct iovec *out)
+{
+ struct vhost_rdma_ack_query_port *rsp;
+
+ CHK_IOVEC(rsp, out);
+
+ rsp->gid_tbl_len = VHOST_MAX_GID_TBL_LEN;
+ rsp->max_msg_sz = 0x800000;
+ rsp->active_mtu = VHOST_RDMA_IB_MTU_256;
+ rsp->phys_mtu = VHOST_RDMA_IB_MTU_256;
+ rsp->port_cap_flags = 65536UL;
+ rsp->bad_pkey_cntr = 0UL;
+ rsp->phys_state = VHOST_RDMA_IB_PORT_PHYS_STATE_POLLING;
+ rsp->pkey_tbl_len = 1UL;
+ rsp->qkey_viol_cntr = 0UL;
+ rsp->state = VHOST_RDMA_IB_PORT_DOWN;
+ rsp->active_speed = 1UL;
+ rsp->active_width = VHOST_RDMA_IB_WIDTH_1X;
+ rsp->max_mtu = VHOST_RDMA_IB_MTU_4096;
+
+ return 0;
+}
+
/* Command handler table declaration */
struct {
int (*handler)(struct vhost_rdma_device *dev, struct iovec *in, struct iovec *out);
const char *name; /* Name of the command (for logging) */
} cmd_tbl[] = {
DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_QUERY_DEVICE, vhost_rdma_query_device),
+ DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_QUERY_PORT, vhost_rdma_query_port),
};
/**
diff --git a/examples/vhost_user_rdma/vhost_rdma_ib.h b/examples/vhost_user_rdma/vhost_rdma_ib.h
index 4ac896d82e..664067b024 100644
--- a/examples/vhost_user_rdma/vhost_rdma_ib.h
+++ b/examples/vhost_user_rdma/vhost_rdma_ib.h
@@ -204,7 +204,44 @@ enum vhost_user_rdma_request {
VHOST_USER_SET_CONFIG = 25,
VHOST_USER_MAX
};
-/** @} */
+
+enum vhost_rdma_ib_port_state {
+ VHOST_RDMA_IB_PORT_NOP = 0,
+ VHOST_RDMA_IB_PORT_DOWN = 1,
+ VHOST_RDMA_IB_PORT_INIT = 2,
+ VHOST_RDMA_IB_PORT_ARMED = 3,
+ VHOST_RDMA_IB_PORT_ACTIVE = 4,
+ VHOST_RDMA_IB_PORT_ACTIVE_DEFER = 5
+};
+
+enum vhost_rdma_ib_port_phys_state {
+ VHOST_RDMA_IB_PORT_PHYS_STATE_SLEEP = 1,
+ VHOST_RDMA_IB_PORT_PHYS_STATE_POLLING = 2,
+ VHOST_RDMA_IB_PORT_PHYS_STATE_DISABLED = 3,
+ VHOST_RDMA_IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING = 4,
+ VHOST_RDMA_IB_PORT_PHYS_STATE_LINK_UP = 5,
+ VHOST_RDMA_IB_PORT_PHYS_STATE_LINK_ERROR_RECOVERY = 6,
+ VHOST_RDMA_IB_PORT_PHYS_STATE_PHY_TEST = 7,
+};
+
+enum ib_port_width {
+ VHOST_RDMA_IB_WIDTH_1X = 1,
+ VHOST_RDMA_IB_WIDTH_2X = 16,
+ VHOST_RDMA_IB_WIDTH_4X = 2,
+ VHOST_RDMA_IB_WIDTH_8X = 4,
+ VHOST_RDMA_IB_WIDTH_12X = 8
+};
+
+enum ib_port_speed {
+ VHOST_RDMA_IB_SPEED_SDR = 1,
+ VHOST_RDMA_IB_SPEED_DDR = 2,
+ VHOST_RDMA_IB_SPEED_QDR = 4,
+ VHOST_RDMA_IB_SPEED_FDR10 = 8,
+ VHOST_RDMA_IB_SPEED_FDR = 16,
+ VHOST_RDMA_IB_SPEED_EDR = 32,
+ VHOST_RDMA_IB_SPEED_HDR = 64,
+ VHOST_RDMA_IB_SPEED_NDR = 128,
+};
/**
* @brief QP capabilities structure
@@ -622,6 +659,23 @@ struct vhost_rdma_ctrl_hdr {
uint8_t cmd;
};
+struct vhost_rdma_ack_query_port {
+ enum vhost_rdma_ib_port_state state;
+ enum vhost_rdma_ib_mtu max_mtu;
+ enum vhost_rdma_ib_mtu active_mtu;
+ uint32_t phys_mtu;
+ int gid_tbl_len;
+ uint32_t port_cap_flags;
+ uint32_t max_msg_sz;
+ uint32_t bad_pkey_cntr;
+ uint32_t qkey_viol_cntr;
+ uint16_t pkey_tbl_len;
+ uint16_t active_speed;
+ uint8_t active_width;
+ uint8_t phys_state;
+ uint32_t reserved[32]; /* For future extensions */
+}__rte_packed;
+
/**
* @brief Convert IB MTU enum to byte size
* @param mtu The MTU enum value
--
2.43.0
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