Add support for Mellanox-SN4280-O8C40 SKU

Signed-off-by: ram25794 <ssingamala@nvidia.com>

Author: ram25794

device/mellanox/x86_64-nvidia_sn4280-r0/Mellanox-SN4280-O8C40/buffers.json.j2

@@ -0,0 +1,18 @@
+{#
+    Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
+    Apache-2.0
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+#}
+{%- set default_topo = 't0' %}
+{%- include 'buffers_config.j2' %}

device/mellanox/x86_64-nvidia_sn4280-r0/Mellanox-SN4280-O8C40/buffers_defaults_objects.j2

@@ -0,0 +1 @@
+../../x86_64-mlnx_msn4700-r0/Mellanox-SN4700-O28/buffers_defaults_objects.j2

device/mellanox/x86_64-nvidia_sn4280-r0/Mellanox-SN4280-O8C40/buffers_defaults_t0.j2

@@ -0,0 +1,43 @@
+{#
+    Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
+    Apache-2.0
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+#}
+{% set default_cable = '5m' %}
+{%-set ports2cable = {
+            'leafrouter_torrouter' : '300m',
+            'torrouter_server' : '5m'
+       }
+-%}
+{% set ingress_lossless_pool_size =  '54296496' %}
+{% set ingress_lossless_pool_xoff  =  '2396160' %}
+{% set egress_lossless_pool_size =  '60817392' %}
+{% set egress_lossy_pool_size =  '54296496' %}
+
+{% import 'buffers_defaults_objects.j2' as defs with context %}
+
+{%- macro generate_buffer_pool_and_profiles_with_inactive_ports(port_names_inactive) %}
+{{ defs.generate_buffer_pool_and_profiles_with_inactive_ports(port_names_inactive) }}
+{%- endmacro %}
+
+{%- macro generate_profile_lists_with_inactive_ports(port_names_active, port_names_inactive) %}
+{{ defs.generate_profile_lists(port_names_active, port_names_inactive) }}
+{%- endmacro %}
+
+{%- macro generate_queue_buffers_with_inactive_ports(port_names_active, port_names_inactive) %}
+{{ defs.generate_queue_buffers(port_names_active, port_names_inactive) }}
+{%- endmacro %}
+
+{%- macro generate_pg_profiles_with_inactive_ports(port_names_active, port_names_inactive) %}
+{{ defs.generate_pg_profiles(port_names_active, port_names_inactive) }}
+{%- endmacro %}

device/mellanox/x86_64-nvidia_sn4280-r0/Mellanox-SN4280-O8C40/buffers_defaults_t1.j2

@@ -0,0 +1,44 @@
+{#
+    Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
+    Apache-2.0
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+#}
+{% set default_cable = '300m' %}
+{%-set ports2cable = {
+            'spinerouter_leafrouter' : '1500m',
+            'leafrouter_torrouter' : '300m'
+       }
+-%}
+{% set ingress_lossless_pool_size =  '51924960' %}
+{% set ingress_lossless_pool_xoff  =  '4767696' %}
+{% set egress_lossless_pool_size =  '60817392' %}
+{% set egress_lossy_pool_size =  '51924960' %}
+
+{% import 'buffers_defaults_objects.j2' as defs with context %}
+
+{%- macro generate_buffer_pool_and_profiles_with_inactive_ports(port_names_inactive) %}
+{{ defs.generate_buffer_pool_and_profiles_with_inactive_ports(port_names_inactive) }}
+{%- endmacro %}
+
+{%- macro generate_profile_lists_with_inactive_ports(port_names_active, port_names_inactive) %}
+{{ defs.generate_profile_lists(port_names_active, port_names_inactive) }}
+{%- endmacro %}
+
+{%- macro generate_queue_buffers_with_inactive_ports(port_names_active, port_names_inactive) %}
+{{ defs.generate_queue_buffers(port_names_active, port_names_inactive) }}
+{%- endmacro %}
+
+{%- macro generate_pg_profiles_with_inactive_ports(port_names_active, port_names_inactive) %}
+{{ defs.generate_pg_profiles(port_names_active, port_names_inactive) }}
+{%- endmacro %}
+

device/mellanox/x86_64-nvidia_sn4280-r0/Mellanox-SN4280-O8C40/buffers_dynamic.json.j2

@@ -0,0 +1,19 @@
+{#
+    Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
+    Apache-2.0
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+#}
+{%- set default_topo = 't0' %}
+{%- set dynamic_mode = 'true' %}
+{%- include 'buffers_config.j2' %}