portsorch: initial support for link-training (sonic-net#2359)

* Squashed commit of the following:

commit 18632a3
Author: Dante Su <dante.su@broadcom.com>
Date:   Mon May 23 12:22:49 2022 +0000

    optimize port state refresh logic

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit 081d491
Author: ds952811 <ds952811@broadcom.com>
Date:   Mon May 23 02:33:56 2022 +0000

    address review comments

    Signed-off-by: ds952811 <ds952811@broadcom.com>

commit 84bdde4
Author: Dante Su <dante.su@broadcom.com>
Date:   Fri May 20 02:15:59 2022 +0000

    update the default LT capability upon get failures

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit 0f73666
Author: Dante Su <dante.su@broadcom.com>
Date:   Thu May 19 11:28:38 2022 +0000

    Rename updatePortStatesXX as refreshPortStatesXX

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit ddd57fe
Author: Dante Su <dante.su@broadcom.com>
Date:   Thu May 19 04:03:13 2022 +0000

    Have AN cap defaults to 1, and use AN attr for LT cap query

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit 876e605
Author: Dante Su <dante.su@broadcom.com>
Date:   Fri May 13 11:15:12 2022 +0000

    drop LT capability query

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit 55ced7d
Author: Dante Su <dante.su@broadcom.com>
Date:   Fri Apr 29 13:53:17 2022 +0000

    incorporate autoneg support from PR#2215

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit a04594e
Author: Dante Su <dante.su@broadcom.com>
Date:   Thu Apr 28 16:33:14 2022 +0000

    address review comments

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit e9eeb9a
Author: Dante Su <dante.su@broadcom.com>
Date:   Thu Apr 28 15:00:04 2022 +0000

    address review comments

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit 4ff604d
Author: Dante Su <dante.su@broadcom.com>
Date:   Fri Apr 22 03:51:56 2022 +0000

    Stop the port state poll by default

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit bdfb8d8
Author: Dante Su <dante.su@broadcom.com>
Date:   Fri Apr 22 03:48:07 2022 +0000

    address review comments

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit 1c6bda8
Author: Dante Su <dante.su@broadcom.com>
Date:   Mon Apr 18 08:46:21 2022 +0000

    Restore pre-emphasis when LT is transitioned from ON to OFF

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit 09a9b33
Author: Dante Su <dante.su@broadcom.com>
Date:   Mon Apr 18 02:33:11 2022 +0000

    fix build failure due to SAI_PORT_ATTR_SUPPORTED_LINK_TRAINING_MODE

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit b0bee3e
Author: Dante Su <dante.su@broadcom.com>
Date:   Thu Apr 14 07:54:14 2022 +0000

    address review comments

    Signed-off-by: Dante Su <dante.su@broadcom.com>

commit c4345ef
Author: Dante Su <dante.su@broadcom.com>
Date:   Fri Mar 25 02:26:05 2022 +0000

    portsorch: initial support for link-training

    - What I did
    Add Link-Training support to portsorch, while Gearbox is not in the scope

    - Why I did it
    In the case of DAC, static pre-calibrated pre-emphasis is rarely available on SONIC, as most of the ODM are expecting this to be done dynamically at runtime via link-training, hence we'll need this feature to improve the link quality

    - How I verified it
    Manual test
    Ran the Unit-tests to the corresponding changes

    Signed-off-by: Dante Su <dante.su@broadcom.com>

* Add support for selected multiple tests

Signed-off-by: Dante Su <dante.su@broadcom.com>

* Revert "Add support for selected multiple tests"

This reverts commit 8e2f7a4.

* fix the comment for 'autoneg is not supported'

Signed-off-by: Dante Su <dante.su@broadcom.com>

* address review comments

Signed-off-by: Dante Su <dante.su@broadcom.com>

* validate AN cap only when there is an update to AN config

Signed-off-by: Dante Su <dante.su@broadcom.com>

* drop the changes to tests/conftest.py

Signed-off-by: Dante Su <dante.su@broadcom.com>

* fix link failure in p4orch_tests-fake_portorch.o

Signed-off-by: Dante Su <dante.su@broadcom.com>

orchagent/p4orch/tests/fake_portorch.cpp

@@ -689,4 +689,8 @@ void PortsOrch::voqSyncDelLagMember(Port &lag, Port &port)
 std::unordered_set<std::string> PortsOrch::generateCounterStats(const string &type, bool gearbox)
 {
     return {};
-}
+}
+
+void PortsOrch::doTask(swss::SelectableTimer &timer)
+{
+}

orchagent/port.h

@@ -119,6 +119,7 @@ class Port
     uint32_t            m_speed = 0;    // Mbps
     std::string         m_learn_mode = "hardware";
     AutoNegMode         m_autoneg = Port::AutoNegMode::AUTONEG_NOT_SET;
+    int                 m_link_training = -1; // -1 means not set, 0 = disabled, 1 = enabled
     bool                m_admin_state_up = false;
     bool                m_init = false;
     bool                m_l3_vni = false;
@@ -177,8 +178,14 @@ class Port
     sai_object_id_t  m_system_side_id = 0;
     sai_object_id_t  m_line_side_id = 0;
 
+    /* pre-emphasis */
+    std::map<sai_port_serdes_attr_t, std::vector<uint32_t>> m_preemphasis;
+
     bool m_fec_cfg = false;
     bool m_an_cfg = false;
+
+    int m_cap_an = -1; /* Capability - AutoNeg, -1 means not set */
+    int m_cap_lt = -1; /* Capability - LinkTraining, -1 means not set */
 };
 
 }