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drm/amdgpu: prepare the output buffer for GET_PEER_LINKS command

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Per the xgmi ta implementation, KGD needs to fill in node_ids
in concern into the shared command output buffer rather than the
command input buffer.

Input buffer is not used for GET_PEER_LINKS command execution.

In this way, xgmi ta can reuse the node info in the output buffer
just filled in and populate the same buffer with link info directly.

Signed-off-by: Shiwu Zhang <shiwu.zhang@amd.com>
Reviewed-by: Le Ma <le.ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Shiwu Zhang 2023-09-20 18:36:55 +08:00 committed by Alex Deucher
parent d9443ac4f9
commit e8a5ded36b
1 changed files with 10 additions and 2 deletions
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12
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
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@ -1431,14 +1431,22 @@ int psp_xgmi_get_topology_info(struct psp_context *psp,
amdgpu_ip_version(psp->adev, MP0_HWIP, 0) ==
IP_VERSION(13, 0, 6);
xgmi_cmd->cmd_id = TA_COMMAND_XGMI__GET_PEER_LINKS;
link_info_output = &xgmi_cmd->xgmi_out_message.get_link_info;
/* popluate the shared output buffer rather than the cmd input buffer
* with node_ids as the input for GET_PEER_LINKS command execution.
* This is required for GET_PEER_LINKS only per xgmi ta implementation
*/
for (i = 0; i < topology->num_nodes; i++) {
link_info_output->nodes[i].node_id = topology->nodes[i].node_id;
}
link_info_output->num_nodes = topology->num_nodes;
xgmi_cmd->cmd_id = TA_COMMAND_XGMI__GET_PEER_LINKS;
ret = psp_xgmi_invoke(psp, TA_COMMAND_XGMI__GET_PEER_LINKS);
if (ret)
return ret;
link_info_output = &xgmi_cmd->xgmi_out_message.get_link_info;
for (i = 0; i < topology->num_nodes; i++) {
/* accumulate num_links on extended data */
topology->nodes[i].num_links = get_extended_data ?