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Date: Sun, 17 Jun 2018 13:00:00 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Doug Ledford <dledford@...hat.com>,
Jason Gunthorpe <jgg@...lanox.com>
Cc: Leon Romanovsky <leonro@...lanox.com>,
RDMA mailing list <linux-rdma@...r.kernel.org>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Matan Barak <matanb@...lanox.com>,
Yishai Hadas <yishaih@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>,
linux-netdev <netdev@...r.kernel.org>
Subject: [PATCH rdma-next v2 14/20] IB/mlx5: Add support for DEVX general command
From: Yishai Hadas <yishaih@...lanox.com>
Add support to run general firmware command via the DEVX interface.
A command that works on some object (e.g. CQ, WQ, etc.) will be added
in next patches while maintaining the required object lock.
Signed-off-by: Yishai Hadas <yishaih@...lanox.com>
Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
---
drivers/infiniband/hw/mlx5/devx.c | 87 ++++++++++++++++++++++++++++++++
include/uapi/rdma/mlx5_user_ioctl_cmds.h | 13 +++++
2 files changed, 100 insertions(+)
diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index 775448910ad1..9fca6541a175 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -13,6 +13,14 @@
#include <linux/mlx5/fs.h>
#include "mlx5_ib.h"
+#define UVERBS_MODULE_NAME mlx5_ib
+#include <rdma/uverbs_named_ioctl.h>
+
+static struct mlx5_ib_ucontext *devx_ufile2uctx(struct ib_uverbs_file *file)
+{
+ return to_mucontext(ib_uverbs_get_ucontext(file));
+}
+
int mlx5_ib_devx_create(struct mlx5_ib_dev *dev, struct mlx5_ib_ucontext *context)
{
u32 in[MLX5_ST_SZ_DW(create_uctx_in)] = {0};
@@ -56,3 +64,82 @@ void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev,
mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
}
+
+static bool devx_is_general_cmd(void *in)
+{
+ u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
+
+ switch (opcode) {
+ case MLX5_CMD_OP_QUERY_HCA_CAP:
+ case MLX5_CMD_OP_QUERY_VPORT_STATE:
+ case MLX5_CMD_OP_QUERY_ADAPTER:
+ case MLX5_CMD_OP_QUERY_ISSI:
+ case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
+ case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
+ case MLX5_CMD_OP_QUERY_VNIC_ENV:
+ case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
+ case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
+ case MLX5_CMD_OP_NOP:
+ case MLX5_CMD_OP_QUERY_CONG_STATUS:
+ case MLX5_CMD_OP_QUERY_CONG_PARAMS:
+ case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(struct ib_device *ib_dev,
+ struct ib_uverbs_file *file,
+ struct uverbs_attr_bundle *attrs)
+{
+ struct mlx5_ib_ucontext *c = devx_ufile2uctx(file);
+ struct mlx5_ib_dev *dev = to_mdev(ib_dev);
+ void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN);
+ int cmd_out_len = uverbs_attr_get_len(attrs,
+ MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT);
+ void *cmd_out;
+ int err;
+
+ if (!c->devx_uid)
+ return -EPERM;
+
+ /* Only white list of some general HCA commands are allowed for this method. */
+ if (!devx_is_general_cmd(cmd_in))
+ return -EINVAL;
+
+ cmd_out = kvzalloc(cmd_out_len, GFP_KERNEL);
+ if (!cmd_out)
+ return -ENOMEM;
+
+ MLX5_SET(general_obj_in_cmd_hdr, cmd_in, uid, c->devx_uid);
+ err = mlx5_cmd_exec(dev->mdev, cmd_in,
+ uverbs_attr_get_len(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_IN),
+ cmd_out, cmd_out_len);
+ if (err)
+ goto other_cmd_free;
+
+ err = uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, cmd_out, cmd_out_len);
+
+other_cmd_free:
+ kvfree(cmd_out);
+ return err;
+}
+
+static DECLARE_UVERBS_NAMED_METHOD(MLX5_IB_METHOD_DEVX_OTHER,
+ &UVERBS_ATTR_PTR_IN_SZ(MLX5_IB_ATTR_DEVX_OTHER_CMD_IN,
+ UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)),
+ UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY |
+ UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO |
+ UVERBS_ATTR_SPEC_F_ALLOC_AND_COPY)),
+ &UVERBS_ATTR_PTR_OUT_SZ(MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
+ UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)),
+ UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY |
+ UVERBS_ATTR_SPEC_F_MIN_SZ_OR_ZERO))
+);
+
+static DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
+ &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER));
+
+static DECLARE_UVERBS_OBJECT_TREE(devx_objects,
+ &UVERBS_OBJECT(MLX5_IB_OBJECT_DEVX));
diff --git a/include/uapi/rdma/mlx5_user_ioctl_cmds.h b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
index f7d685ef2d1f..0b456fa91bb4 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_cmds.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
@@ -45,4 +45,17 @@ enum mlx5_ib_alloc_dm_attrs {
MLX5_IB_ATTR_ALLOC_DM_RESP_PAGE_INDEX,
};
+enum mlx5_ib_devx_methods {
+ MLX5_IB_METHOD_DEVX_OTHER = (1U << UVERBS_ID_NS_SHIFT),
+};
+
+enum mlx5_ib_devx_other_attrs {
+ MLX5_IB_ATTR_DEVX_OTHER_CMD_IN = (1U << UVERBS_ID_NS_SHIFT),
+ MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
+};
+
+enum mlx5_ib_devx_objects {
+ MLX5_IB_OBJECT_DEVX = (1U << UVERBS_ID_NS_SHIFT),
+};
+
#endif
--
2.14.4
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