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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2022 Oxide Computer Company
*/
/*
* A collection of utility functions for interacting with fabric IDs.
*/
#include "zen_umc.h"
/*
* Validate whether a fabric ID actually represents a valid ID for a given data
* fabric.
*/
boolean_t
zen_fabric_id_valid_fabid(const df_fabric_decomp_t *decomp,
const uint32_t fabid)
{
uint32_t mask = decomp->dfd_node_mask | decomp->dfd_comp_mask;
return ((fabid & ~mask) == 0);
}
/*
* Validate whether the parts of a fabric ID (e.g. the socket, die, and
* component) are in fact valid for a given data fabric.
*/
boolean_t
zen_fabric_id_valid_parts(const df_fabric_decomp_t *decomp, const uint32_t sock,
const uint32_t die, const uint32_t comp)
{
uint32_t node;
if (((sock << decomp->dfd_sock_shift) & ~decomp->dfd_sock_mask) != 0) {
return (B_FALSE);
}
if (((die << decomp->dfd_die_shift) & ~decomp->dfd_die_mask) != 0) {
return (B_FALSE);
}
if ((comp & ~decomp->dfd_comp_mask) != 0) {
return (B_FALSE);
}
node = die << decomp->dfd_die_shift;
node |= sock << decomp->dfd_sock_shift;
if (((node << decomp->dfd_node_shift) & ~decomp->dfd_node_mask) != 0) {
return (B_FALSE);
}
return (B_TRUE);
}
/*
* Take apart a fabric ID into its constituent parts. The decomposition
* information has the die and socket information relative to the node ID.
*/
void
zen_fabric_id_decompose(const df_fabric_decomp_t *decomp, const uint32_t fabid,
uint32_t *sockp, uint32_t *diep, uint32_t *compp)
{
uint32_t node;
ASSERT(zen_fabric_id_valid_fabid(decomp, fabid));
*compp = (fabid & decomp->dfd_comp_mask) >> decomp->dfd_comp_shift;
node = (fabid & decomp->dfd_node_mask) >> decomp->dfd_node_shift;
*diep = (node & decomp->dfd_die_mask) >> decomp->dfd_die_shift;
*sockp = (node & decomp->dfd_sock_mask) >> decomp->dfd_sock_shift;
}
/*
* Compose a fabric ID from its constituent parts: the socket, die, and fabric.
*/
void
zen_fabric_id_compose(const df_fabric_decomp_t *decomp, const uint32_t sock,
const uint32_t die, const uint32_t comp, uint32_t *fabidp)
{
uint32_t node;
ASSERT(zen_fabric_id_valid_parts(decomp, sock, die, comp));
node = die << decomp->dfd_die_shift;
node |= sock << decomp->dfd_sock_shift;
*fabidp = (node << decomp->dfd_node_shift) |
(comp << decomp->dfd_comp_shift);
}
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