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IB/mlx5: Implement the ODP capability query verb 

The patch adds infrastructure to query ODP capabilities in the mlx5
driver. The code will read the capabilities from the device, and
enable only those capabilities that both the driver and the device
supports.  At this point ODP is not supported, so no capability is
copied from the device, but the patch exposes the global ODP device
capability bit.

Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
hifive-unleashed-5.1
Haggai Eran 2014-12-11 17:04:20 +02:00 committed by Roland Dreier
parent e420f0c0f3
commit 8cdd312cfe
4 changed files with 83 additions and 0 deletions
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1
drivers/infiniband/hw/mlx5/Makefile
View File

@ -1,3 +1,4 @@
obj-$(CONFIG_MLX5_INFINIBAND) += mlx5_ib.o
mlx5_ib-y := main.o cq.o doorbell.o qp.o mem.o srq.o mr.o ah.o mad.o
mlx5_ib-$(CONFIG_INFINIBAND_ON_DEMAND_PAGING) += odp.o

10
drivers/infiniband/hw/mlx5/main.c
View File

@ -244,6 +244,12 @@ static int mlx5_ib_query_device(struct ib_device *ibdev,
props->max_mcast_grp;
props->max_map_per_fmr = INT_MAX; /* no limit in ConnectIB */
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
if (dev->mdev->caps.gen.flags & MLX5_DEV_CAP_FLAG_ON_DMND_PG)
props->device_cap_flags |= IB_DEVICE_ON_DEMAND_PAGING;
props->odp_caps = dev->odp_caps;
#endif
out:
kfree(in_mad);
kfree(out_mad);
@ -1321,6 +1327,8 @@ static void *mlx5_ib_add(struct mlx5_core_dev *mdev)
(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
(1ull << IB_USER_VERBS_CMD_CREATE_XSRQ) |
(1ull << IB_USER_VERBS_CMD_OPEN_QP);
dev->ib_dev.uverbs_ex_cmd_mask =
(1ull << IB_USER_VERBS_EX_CMD_QUERY_DEVICE);
dev->ib_dev.query_device = mlx5_ib_query_device;
dev->ib_dev.query_port = mlx5_ib_query_port;
@ -1366,6 +1374,8 @@ static void *mlx5_ib_add(struct mlx5_core_dev *mdev)
dev->ib_dev.free_fast_reg_page_list = mlx5_ib_free_fast_reg_page_list;
dev->ib_dev.check_mr_status = mlx5_ib_check_mr_status;
mlx5_ib_internal_query_odp_caps(dev);
if (mdev->caps.gen.flags & MLX5_DEV_CAP_FLAG_XRC) {
dev->ib_dev.alloc_xrcd = mlx5_ib_alloc_xrcd;
dev->ib_dev.dealloc_xrcd = mlx5_ib_dealloc_xrcd;

12
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@ -390,6 +390,9 @@ struct mlx5_ib_dev {
struct mlx5_mr_cache cache;
struct timer_list delay_timer;
int fill_delay;
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
struct ib_odp_caps odp_caps;
#endif
};
static inline struct mlx5_ib_cq *to_mibcq(struct mlx5_core_cq *mcq)
@ -559,6 +562,15 @@ void mlx5_umr_cq_handler(struct ib_cq *cq, void *cq_context);
int mlx5_ib_check_mr_status(struct ib_mr *ibmr, u32 check_mask,
struct ib_mr_status *mr_status);
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
int mlx5_ib_internal_query_odp_caps(struct mlx5_ib_dev *dev);
#else
static inline int mlx5_ib_internal_query_odp_caps(struct mlx5_ib_dev *dev)
{
return 0;
}
#endif /* CONFIG_INFINIBAND_ON_DEMAND_PAGING */
static inline void init_query_mad(struct ib_smp *mad)
{
mad->base_version = 1;

60
drivers/infiniband/hw/mlx5/odp.c 100644
View File

@ -0,0 +1,60 @@
/*
* Copyright (c) 2014 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "mlx5_ib.h"
#define COPY_ODP_BIT_MLX_TO_IB(reg, ib_caps, field_name, bit_name) do { \
if (be32_to_cpu(reg.field_name) & MLX5_ODP_SUPPORT_##bit_name) \
ib_caps->field_name |= IB_ODP_SUPPORT_##bit_name; \
} while (0)
int mlx5_ib_internal_query_odp_caps(struct mlx5_ib_dev *dev)
{
int err;
struct mlx5_odp_caps hw_caps;
struct ib_odp_caps *caps = &dev->odp_caps;
memset(caps, 0, sizeof(*caps));
if (!(dev->mdev->caps.gen.flags & MLX5_DEV_CAP_FLAG_ON_DMND_PG))
return 0;
err = mlx5_query_odp_caps(dev->mdev, &hw_caps);
if (err)
goto out;
/* At this point we would copy the capability bits that the driver
* supports from the hw_caps struct to the caps struct. However, no
* such capabilities are supported so far. */
out:
return err;
}