diff mbox

[for-next,V2,3/5] IB/mlx5: Add support for hca_core_clock and timestamp_mask

Message ID 1450204213-5630-4-git-send-email-matanb@mellanox.com (mailing list archive)
State Accepted
Headers show

Commit Message

Matan Barak Dec. 15, 2015, 6:30 p.m. UTC 
Reporting the hca_core_clock (in kHZ) and the timestamp_mask in
query_device extended verb. timestamp_mask is used by users in order
to know what is the valid range of the raw timestamps, while
hca_core_clock reports the clock frequency that is used for
timestamps.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Moshe Lazer <moshel@mellanox.com>
---
 drivers/infiniband/hw/mlx5/main.c | 2 ++
 include/linux/mlx5/mlx5_ifc.h     | 9 ++++++---
 2 files changed, 8 insertions(+), 3 deletions(-)

Comments

Sagi Grimberg Dec. 16, 2015, 2:43 p.m. UTC | #1 
> Reporting the hca_core_clock (in kHZ) and the timestamp_mask in
> query_device extended verb. timestamp_mask is used by users in order
> to know what is the valid range of the raw timestamps, while
> hca_core_clock reports the clock frequency that is used for
> timestamps.

Hi Matan,

Shouldn't this patch come last?
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Matan Barak Dec. 16, 2015, 2:50 p.m. UTC | #2 
On Wed, Dec 16, 2015 at 4:43 PM, Sagi Grimberg <sagig@dev.mellanox.co.il> wrote:
>
>> Reporting the hca_core_clock (in kHZ) and the timestamp_mask in
>> query_device extended verb. timestamp_mask is used by users in order
>> to know what is the valid range of the raw timestamps, while
>> hca_core_clock reports the clock frequency that is used for
>> timestamps.
>
>
> Hi Matan,
>
> Shouldn't this patch come last?
>

Not necessarily. In order to support completion timestamping (that's
what defined in this query_device patch), we only need create_cq_ex in
mlx5_ib.
The down stream patches adds support for reading the HCA core clock
(via query_values).
One could have completion timestamping support without having
ibv_query_values support.

Thanks for taking a look.

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diff mbox

Patch

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 7e97cb5..c707c43 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -293,6 +293,8 @@  static int mlx5_ib_query_device(struct ib_device *ibdev,
 	props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 					   props->max_mcast_grp;
 	props->max_map_per_fmr = INT_MAX; /* no limit in ConnectIB */
+	props->hca_core_clock = MLX5_CAP_GEN(mdev, device_frequency_khz);
+	props->timestamp_mask = 0x7FFFFFFFFFFFFFFFULL;
 
 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 	if (MLX5_CAP_GEN(mdev, pg))
diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 1565324..1a74114 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -794,15 +794,18 @@  struct mlx5_ifc_cmd_hca_cap_bits {
 	u8         reserved_63[0x8];
 	u8         log_uar_page_sz[0x10];
 
-	u8         reserved_64[0x100];
+	u8	   reserved_64[0x20];
+	u8	   device_frequency_mhz[0x20];
+	u8	   device_frequency_khz[0x20];
+	u8         reserved_65[0xa0];
 
-	u8         reserved_65[0x1f];
+	u8         reserved_66[0x1f];
 	u8         cqe_zip[0x1];
 
 	u8         cqe_zip_timeout[0x10];
 	u8         cqe_zip_max_num[0x10];
 
-	u8         reserved_66[0x220];
+	u8         reserved_67[0x220];
 };
 
 enum {