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IB/mlx5: Add CREATE_PSV/DESTROY_PSV for devx interface 

Limit the number of PSV's created through devx to 1, to create a symmetry
between create/destroy cmds. In the kernel, one can create up to 4 PSV's
using CREATE_PSV cmd but the destruction is one by one. Add a protection
for this a-symmetric definition for devx.

Link: https://lore.kernel.org/r/20190723070412.6385-1-leon@kernel.org
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Max Gurtovoy 2019-07-23 10:04:12 +03:00 committed by Jason Gunthorpe
parent 1d2fedd856
commit 8b38c538d4
1 changed files with 14 additions and 0 deletions
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14
drivers/infiniband/hw/mlx5/devx.c
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@ -776,6 +776,14 @@ static bool devx_is_obj_create_cmd(const void *in, u16 *opcode)
return true;
return false;
}
case MLX5_CMD_OP_CREATE_PSV:
{
u8 num_psv = MLX5_GET(create_psv_in, in, num_psv);
if (num_psv == 1)
return true;
return false;
}
default:
return false;
}
@ -1215,6 +1223,12 @@ static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
case MLX5_CMD_OP_ALLOC_XRCD:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_XRCD);
break;
case MLX5_CMD_OP_CREATE_PSV:
MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
MLX5_CMD_OP_DESTROY_PSV);
MLX5_SET(destroy_psv_in, din, psvn,
MLX5_GET(create_psv_out, out, psv0_index));
break;
default:
/* The entry must match to one of the devx_is_obj_create_cmd */
WARN_ON(true);