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IB/mlx5: Add support for DEVX general command 

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@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Yishai Hadas 2018-06-17 13:00:00 +03:00 committed by Jason Gunthorpe
parent a8b92ca1b0
commit 8aa8c95ce4
2 changed files with 100 additions and 0 deletions
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87
drivers/infiniband/hw/mlx5/devx.c
View File

@ -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));

13
include/uapi/rdma/mlx5_user_ioctl_cmds.h
View File

@ -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