net/mlx5_core: Introduce access function to read internal timer

A preparation step which adds support for reading the hardware
internal timer and the hardware timestamping from the CQE.
In addition, advertize device_frequency_khz HCA capability.

Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 789882b7b711e31eaccbd7c04903c72b2c8fa751..67676cf0d507b99d35582534dd8e1f5e889bd33c 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -504,6 +504,19 @@ int mlx5_core_disable_hca(struct mlx5_core_dev *dev, u16 func_id)
        return mlx5_cmd_status_to_err_v2(out);
 }
 
+cycle_t mlx5_read_internal_timer(struct mlx5_core_dev *dev)
+{
+       u32 timer_h, timer_h1, timer_l;
+
+       timer_h = ioread32be(&dev->iseg->internal_timer_h);
+       timer_l = ioread32be(&dev->iseg->internal_timer_l);
+       timer_h1 = ioread32be(&dev->iseg->internal_timer_h);
+       if (timer_h != timer_h1) /* wrap around */
+               timer_l = ioread32be(&dev->iseg->internal_timer_l);
+
+       return (cycle_t)timer_l | (cycle_t)timer_h1 << 32;
+}
+
 static int mlx5_irq_set_affinity_hint(struct mlx5_core_dev *mdev, int i)
 {
        struct mlx5_priv *priv  = &mdev->priv;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
index ea6a137fd76c8710a663362324818e5e6e69fe4c..0336847ec9a163feb9f3da8d87d811b04671d404 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
@@ -98,6 +98,7 @@ int mlx5_core_sriov_configure(struct pci_dev *dev, int num_vfs);
 int mlx5_core_enable_hca(struct mlx5_core_dev *dev, u16 func_id);
 int mlx5_core_disable_hca(struct mlx5_core_dev *dev, u16 func_id);
 int mlx5_wait_for_vf_pages(struct mlx5_core_dev *dev);
+cycle_t mlx5_read_internal_timer(struct mlx5_core_dev *dev);
 
 void mlx5e_init(void);
 void mlx5e_cleanup(void);

diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h
index 7d3a85faefb73eed68f5b7faef0118460a7e476f..df2f79ef3cac94da55c5317f2be3e005f706629f 100644 (file)
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -443,9 +443,12 @@ struct mlx5_init_seg {
        __be32                  rsvd1[120];
        __be32                  initializing;
        struct health_buffer    health;
-       __be32                  rsvd2[884];
+       __be32                  rsvd2[880];
+       __be32                  internal_timer_h;
+       __be32                  internal_timer_l;
+       __be32                  rsrv3[2];
        __be32                  health_counter;
-       __be32                  rsvd3[1019];
+       __be32                  rsvd4[1019];
        __be64                  ieee1588_clk;
        __be32                  ieee1588_clk_type;
        __be32                  clr_intx;
@@ -601,7 +604,8 @@ struct mlx5_cqe64 {
        __be32          imm_inval_pkey;
        u8              rsvd40[4];
        __be32          byte_cnt;
-       __be64          timestamp;
+       __be32          timestamp_h;
+       __be32          timestamp_l;
        __be32          sop_drop_qpn;
        __be16          wqe_counter;
        u8              signature;
@@ -623,6 +627,16 @@ static inline int cqe_has_vlan(struct mlx5_cqe64 *cqe)
        return !!(cqe->l4_hdr_type_etc & 0x1);
 }
 
+static inline u64 get_cqe_ts(struct mlx5_cqe64 *cqe)
+{
+       u32 hi, lo;
+
+       hi = be32_to_cpu(cqe->timestamp_h);
+       lo = be32_to_cpu(cqe->timestamp_l);
+
+       return (u64)lo | ((u64)hi << 32);
+}
+
 enum {
        CQE_L4_HDR_TYPE_NONE                    = 0x0,
        CQE_L4_HDR_TYPE_TCP_NO_ACK              = 0x1,

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 131a2737cfa3c0ae739b7eca77d02017ab3103b6..1780a85a879768827d445622ba662b34e4c149d6 100644 (file)
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -829,9 +829,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
        u8         reserved_66[0x8];
        u8         log_uar_page_sz[0x10];
 
-       u8         reserved_67[0xe0];
-
-       u8         reserved_68[0x1f];
+       u8         reserved_67[0x40];
+       u8         device_frequency_khz[0x20];
+       u8         reserved_68[0x5f];
        u8         cqe_zip[0x1];
 
        u8         cqe_zip_timeout[0x10];