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545 lines
20 KiB
C
545 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* NII Core Surface Driver - Mathematically Defendable NII Core Driver
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*
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* Copyright (c) 2026 Sovereign Research Stack
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*
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* This driver implements the NII core surface driver based on first principles
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* from Canonical Core v1 architecture:
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* - Layer 6: Steady-State Stability (SSS) monitoring
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* - Layer 7: Alcubierre Information Metric for warp-speed compression
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* - FAMM-aware scheduling based on frustration timing
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* - Topological state management with N-local adaptation
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* - Q16.16 fixed-point arithmetic for hardware-native computation
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*
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* Based on Linux kernel drivers/fpga/ice40-spi.c by Joel Holdsworth
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*/
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <linux/gpio/consumer.h>
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#include <linux/fpga/fpga-mgr.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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// ═══════════════════════════════════════════════════════════════════════════
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// Q16.16 Fixed-Point Arithmetic
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// ═══════════════════════════════════════════════════════════════════════════
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typedef int32_t q16_16_t;
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#define Q16_16_ONE ((q16_16_t)(1 << 16))
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#define Q16_16_ZERO ((q16_16_t)0)
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#define Q16_16_FROM_FLOAT(f) ((q16_16_t)((f) * (1 << 16)))
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#define Q16_16_TO_FLOAT(q) ((float)(q) / (1 << 16))
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static inline q16_16_t q16_16_add(q16_16_t a, q16_16_t b)
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{
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return a + b;
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}
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static inline q16_16_t q16_16_sub(q16_16_t a, q16_16_t b)
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{
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return a - b;
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}
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static inline q16_16_t q16_16_mul(q16_16_t a, q16_16_t b)
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{
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return (q16_16_t)(((int64_t)a * (int64_t)b) >> 16);
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}
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static inline q16_16_t q16_16_div(q16_16_t a, q16_16_t b)
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{
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return (q16_16_t)(((int64_t)a << 16) / b);
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}
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static inline int q16_16_compare(q16_16_t a, q16_16_t b)
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{
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if (a < b) return -1;
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if (a > b) return 1;
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return 0;
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}
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// ═══════════════════════════════════════════════════════════════════════════
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// Steady-State Stability (SSS) - Layer 6
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// ═══════════════════════════════════════════════════════════════════════════
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struct sss_constant {
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q16_16_t routing_load; // L_R: routing load (counter-torque)
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q16_16_t memory_load; // L_M: memory load (counter-torque)
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q16_16_t extraneous_weight; // λ_E: extraneous load weight
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q16_16_t engram_length; // ℓ: characteristic engram neighborhood length
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q16_16_t extraneous_gradient; // ‖∇L_E‖: gradient magnitude
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};
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struct slip_condition {
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q16_16_t sss_constant;
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q16_16_t heel_dig_limit; // σ_sys: slip threshold
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};
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static q16_16_t compute_sss(const struct sss_constant *c)
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{
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q16_16_t counter_torque = q16_16_add(c->routing_load, c->memory_load);
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q16_16_t torsional_term = q16_16_mul(
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q16_16_mul(c->extraneous_weight, c->engram_length),
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c->extraneous_gradient
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);
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return q16_16_sub(counter_torque, torsional_term);
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}
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static bool is_slip_threshold_crossed(const struct slip_condition *c)
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{
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return q16_16_compare(c->sss_constant, -c->heel_dig_limit) < 0;
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}
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// ═══════════════════════════════════════════════════════════════════════════
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// Alcubierre Information Metric - Layer 7
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// ═══════════════════════════════════════════════════════════════════════════
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struct warp_function {
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q16_16_t kappa; // Steepness parameter
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q16_16_t sss_constant;
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q16_16_t opcode_efficacy; // Ω_opcode
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};
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// Simplified sigmoid approximation for Q16.16
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static q16_16_t sigmoid_q16_16(q16_16_t x)
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{
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// Use piecewise linear approximation for simplicity
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// In production, use polynomial approximation or lookup table
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if (x < Q16_16_FROM_FLOAT(-5.0f))
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return Q16_16_ZERO;
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if (x > Q16_16_FROM_FLOAT(5.0f))
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return Q16_16_ONE;
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return q16_16_div(
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q16_16_add(x, Q16_16_FROM_FLOAT(5.0f)),
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Q16_16_FROM_FLOAT(10.0f)
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);
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}
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static q16_16_t compute_warp(const struct warp_function *w)
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{
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q16_16_t exponent = q16_16_mul(-w->kappa, w->sss_constant);
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q16_16_t sigmoid = sigmoid_q16_16(exponent);
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return q16_16_mul(sigmoid, w->opcode_efficacy);
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}
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struct effective_velocity {
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q16_16_t local_velocity;
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q16_16_t coherence; // φ: phase coherence angle
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};
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static q16_16_t compute_effective_velocity(const struct effective_velocity *v)
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{
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q16_16_t denominator = q16_16_sub(Q16_16_ONE, v->coherence);
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if (denominator <= Q16_16_ZERO)
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return v->local_velocity; // Avoid division by zero
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return q16_16_div(v->local_velocity, denominator);
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}
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struct warp_metric {
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q16_16_t proper_time; // dτ
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q16_16_t entropy_displacement; // dH
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q16_16_t effective_velocity;
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q16_16_t warp_coupling; // f · Ω
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};
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static q16_16_t compute_warp_metric(const struct warp_metric *m)
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{
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q16_16_t time_term = q16_16_mul(-m->proper_time, m->proper_time);
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q16_16_t space_term = q16_16_sub(
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m->entropy_displacement,
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q16_16_mul(
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q16_16_mul(m->effective_velocity, m->warp_coupling),
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m->proper_time
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)
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);
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return q16_16_add(time_term, q16_16_mul(space_term, space_term));
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}
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// ═══════════════════════════════════════════════════════════════════════════
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// FAMM-Aware Scheduling
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// ═══════════════════════════════════════════════════════════════════════════
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struct famm_timing {
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q16_16_t torsional_stress; // Σ²
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q16_16_t interlocking_energy; // I_lock
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q16_16_t laplacian_energy; // Δϕ
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};
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enum schedule_decision {
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SCHEDULE_EXECUTE,
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SCHEDULE_DEFER,
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SCHEDULE_THROTTLE,
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};
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static q16_16_t compute_famm_load(const struct famm_timing *t)
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{
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return q16_16_add(
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q16_16_add(t->torsional_stress, t->interlocking_energy),
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t->laplacian_energy
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);
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}
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static enum schedule_decision make_schedule_decision(q16_16_t load)
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{
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if (load < Q16_16_FROM_FLOAT(0.25f))
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return SCHEDULE_EXECUTE;
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else if (load < Q16_16_FROM_FLOAT(0.5f))
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return SCHEDULE_THROTTLE;
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else
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return SCHEDULE_DEFER;
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}
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// ═══════════════════════════════════════════════════════════════════════════
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// Topological State Management
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// ═══════════════════════════════════════════════════════════════════════════
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struct topological_state {
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q16_16_t cognitive_load;
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const char *topology_metric; // "relational", "semantic", "topological", "minimal"
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q16_16_t coherence;
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};
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static const char *adapt_topology(q16_16_t cognitive_load)
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{
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if (cognitive_load < Q16_16_FROM_FLOAT(0.25f))
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return "relational";
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else if (cognitive_load < Q16_16_FROM_FLOAT(0.5f))
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return "semantic";
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else if (cognitive_load < Q16_16_FROM_FLOAT(0.75f))
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return "topological";
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else
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return "minimal";
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}
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// ═══════════════════════════════════════════════════════════════════════════
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// NII Core Surface Driver State
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// ═══════════════════════════════════════════════════════════════════════════
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enum nii_core_id {
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NII_CORE_SEMANTIC,
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NII_CORE_TRANSLATION,
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NII_CORE_VERIFICATION,
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};
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enum core_status {
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CORE_STATUS_IDLE,
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CORE_STATUS_PROCESSING,
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CORE_STATUS_COMPLETE,
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CORE_STATUS_ERROR,
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};
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struct nii_surface_driver_state {
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enum nii_core_id core_id;
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struct sss_constant sss_constant;
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struct slip_condition slip_condition;
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struct warp_function warp_function;
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struct famm_timing famm_timing;
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struct topological_state topological_state;
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enum core_status current_status;
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// Hardware resources
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struct spi_device *spi;
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struct gpio_desc *reset;
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struct gpio_desc *cdone;
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// Work queue for async operations
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struct workqueue_struct *workqueue;
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struct work_struct work;
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};
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// ═══════════════════════════════════════════════════════════════════════════
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// Driver Initialization
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// ═══════════════════════════════════════════════════════════════════════════
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static void init_nii_driver_state(struct nii_surface_driver_state *state,
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enum nii_core_id core_id)
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{
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state->core_id = core_id;
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// Initialize SSS constant
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state->sss_constant.routing_load = Q16_16_FROM_FLOAT(1.0f);
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state->sss_constant.memory_load = Q16_16_FROM_FLOAT(0.8f);
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state->sss_constant.extraneous_weight = Q16_16_FROM_FLOAT(0.5f);
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state->sss_constant.engram_length = Q16_16_FROM_FLOAT(4.0f);
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state->sss_constant.extraneous_gradient = Q16_16_FROM_FLOAT(0.1f);
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// Initialize slip condition
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state->slip_condition.sss_constant = compute_sss(&state->sss_constant);
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state->slip_condition.heel_dig_limit = Q16_16_FROM_FLOAT(0.5f);
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// Initialize warp function
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state->warp_function.kappa = Q16_16_FROM_FLOAT(1.0f);
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state->warp_function.sss_constant = state->slip_condition.sss_constant;
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state->warp_function.opcode_efficacy = Q16_16_ONE;
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// Initialize FAMM timing
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state->famm_timing.torsional_stress = Q16_16_FROM_FLOAT(1.0f);
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state->famm_timing.interlocking_energy = Q16_16_FROM_FLOAT(0.5f);
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state->famm_timing.laplacian_energy = Q16_16_FROM_FLOAT(0.3f);
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// Initialize topological state
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state->topological_state.cognitive_load = Q16_16_ZERO;
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state->topological_state.topology_metric = "relational";
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state->topological_state.coherence = Q16_16_ONE;
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state->current_status = CORE_STATUS_IDLE;
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}
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// ═══════════════════════════════════════════════════════════════════════════
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// SSS Monitoring Loop (Work Queue)
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// ═══════════════════════════════════════════════════════════════════════════
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static void sss_monitor_work(struct work_struct *work)
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{
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struct nii_surface_driver_state *state = container_of(work,
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struct nii_surface_driver_state, work);
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// Update SSS constant
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state->slip_condition.sss_constant = compute_sss(&state->sss_constant);
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// Check slip threshold
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if (is_slip_threshold_crossed(&state->slip_condition)) {
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dev_err(&state->spi->dev, "Slip threshold crossed - MODE_SURVIVAL\n");
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state->current_status = CORE_STATUS_ERROR;
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// Trigger MODE_SURVIVAL: VRAM_FLUSH
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gpiod_set_value(state->reset, 1);
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udelay(1000); // 1ms reset
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gpiod_set_value(state->reset, 0);
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}
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// Update warp function
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state->warp_function.sss_constant = state->slip_condition.sss_constant;
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// Update topological state
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state->topological_state.topology_metric =
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adapt_topology(state->topological_state.cognitive_load);
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}
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// ═══════════════════════════════════════════════════════════════════════════
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// FPGA Manager Operations
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// ═══════════════════════════════════════════════════════════════════════════
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static enum fpga_mgr_states nii_fpga_ops_state(struct fpga_manager *mgr)
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{
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struct nii_surface_driver_state *state = mgr->priv;
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return gpiod_get_value(state->cdone) ? FPGA_MGR_STATE_OPERATING :
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FPGA_MGR_STATE_UNKNOWN;
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}
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static int nii_fpga_ops_write_init(struct fpga_manager *mgr,
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struct fpga_image_info *info,
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const char *buf, size_t count)
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{
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struct nii_surface_driver_state *state = mgr->priv;
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struct spi_device *spi = state->spi;
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struct spi_message message;
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struct spi_transfer assert_cs_then_reset_delay = {
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.cs_change = 1,
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.delay = {
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.value = 1, // 1us delay
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.unit = SPI_DELAY_UNIT_USECS
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}
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};
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struct spi_transfer housekeeping_delay_then_release_cs = {
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.delay = {
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.value = 10, // 10us housekeeping
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.unit = SPI_DELAY_UNIT_USECS
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}
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};
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int ret;
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if ((info->flags & FPGA_MGR_PARTIAL_RECONFIG)) {
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dev_err(&spi->dev, "Partial reconfiguration is not supported\n");
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return -ENOTSUPP;
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}
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// Lock the bus, assert CRESET_B and SS_B
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spi_bus_lock(spi->controller);
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gpiod_set_value(state->reset, 1);
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spi_message_init(&message);
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spi_message_add_tail(&assert_cs_then_reset_delay, &message);
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ret = spi_sync_locked(spi, &message);
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// Come out of reset
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gpiod_set_value(state->reset, 0);
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if (ret)
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goto fail;
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// Check CDONE is de-asserted
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if (gpiod_get_value(state->cdone)) {
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dev_err(&spi->dev, "Device reset failed, CDONE is asserted\n");
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ret = -EIO;
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goto fail;
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}
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// Wait for housekeeping
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spi_message_init(&message);
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spi_message_add_tail(&housekeeping_delay_then_release_cs, &message);
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ret = spi_sync_locked(spi, &message);
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fail:
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spi_bus_unlock(spi->controller);
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return ret;
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}
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static int nii_fpga_ops_write(struct fpga_manager *mgr,
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const char *buf, size_t count)
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{
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struct nii_surface_driver_state *state = mgr->priv;
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return spi_write(state->spi, buf, count);
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}
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static int nii_fpga_ops_write_complete(struct fpga_manager *mgr,
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struct fpga_image_info *info)
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{
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struct nii_surface_driver_state *state = mgr->priv;
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struct spi_device *spi = state->spi;
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const u8 padding[7] = {0}; // 49 bits = 7 bytes
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// Check CDONE is asserted
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if (!gpiod_get_value(state->cdone)) {
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dev_err(&spi->dev, "CDONE was not asserted after firmware transfer\n");
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return -EIO;
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}
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// Send zero-padding to activate firmware
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return spi_write(spi, padding, sizeof(padding));
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}
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static const struct fpga_manager_ops nii_fpga_ops = {
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.state = nii_fpga_ops_state,
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.write_init = nii_fpga_ops_write_init,
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.write = nii_fpga_ops_write,
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.write_complete = nii_fpga_ops_write_complete,
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};
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// ═══════════════════════════════════════════════════════════════════════════
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// Probe Function
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// ═══════════════════════════════════════════════════════════════════════════
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static int nii_surface_driver_probe(struct spi_device *spi)
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{
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struct device *dev = &spi->dev;
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struct nii_surface_driver_state *state;
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struct fpga_manager *mgr;
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int ret;
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state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
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if (!state)
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return -ENOMEM;
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state->spi = spi;
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// Check SPI speed limits
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if (spi->max_speed_hz > 25000000) { // 25MHz max
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dev_err(dev, "SPI speed is too high, maximum speed is 25MHz\n");
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return -EINVAL;
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}
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if (spi->max_speed_hz < 1000000) { // 1MHz min
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dev_err(dev, "SPI speed is too low, minimum speed is 1MHz\n");
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return -EINVAL;
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}
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if (spi->mode & SPI_CPHA) {
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dev_err(dev, "Bad SPI mode, CPHA not supported\n");
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return -EINVAL;
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}
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// Set up GPIOs
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state->cdone = devm_gpiod_get(dev, "cdone", GPIOD_IN);
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if (IS_ERR(state->cdone)) {
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ret = PTR_ERR(state->cdone);
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dev_err(dev, "Failed to get CDONE GPIO: %d\n", ret);
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return ret;
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}
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state->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
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if (IS_ERR(state->reset)) {
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ret = PTR_ERR(state->reset);
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dev_err(dev, "Failed to get CRESET_B GPIO: %d\n", ret);
|
||
return ret;
|
||
}
|
||
|
||
// Initialize driver state
|
||
init_nii_driver_state(state, NII_CORE_SEMANTIC);
|
||
|
||
// Create work queue for SSS monitoring
|
||
state->workqueue = alloc_workqueue("nii_sss_monitor", WQ_HIGHPRI, 0);
|
||
if (!state->workqueue) {
|
||
dev_err(dev, "Failed to allocate workqueue\n");
|
||
return -ENOMEM;
|
||
}
|
||
|
||
INIT_WORK(&state->work, sss_monitor_work);
|
||
|
||
// Register FPGA manager
|
||
mgr = devm_fpga_mgr_register(dev, "NII Core Surface Driver",
|
||
&nii_fpga_ops, state);
|
||
if (IS_ERR(mgr)) {
|
||
ret = PTR_ERR(mgr);
|
||
dev_err(dev, "Failed to register FPGA manager: %d\n", ret);
|
||
destroy_workqueue(state->workqueue);
|
||
return ret;
|
||
}
|
||
|
||
spi_set_drvdata(spi, state);
|
||
|
||
dev_info(dev, "NII Core Surface Driver initialized\n");
|
||
dev_info(dev, "SSS constant: %f\n", Q16_16_TO_FLOAT(state->slip_condition.sss_constant));
|
||
dev_info(dev, "Topology: %s\n", state->topological_state.topology_metric);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void nii_surface_driver_remove(struct spi_device *spi)
|
||
{
|
||
struct nii_surface_driver_state *state = spi_get_drvdata(spi);
|
||
|
||
if (state->workqueue) {
|
||
destroy_workqueue(state->workqueue);
|
||
}
|
||
|
||
dev_info(&spi->dev, "NII Core Surface Driver removed\n");
|
||
}
|
||
|
||
// ═══════════════════════════════════════════════════════════════════════════
|
||
// Device Tree Match Table
|
||
// ═══════════════════════════════════════════════════════════════════════════
|
||
|
||
static const struct of_device_id nii_fpga_of_match[] = {
|
||
{ .compatible = "sovereign,nii-surface-driver", },
|
||
{},
|
||
};
|
||
MODULE_DEVICE_TABLE(of, nii_fpga_of_match);
|
||
|
||
static const struct spi_device_id nii_fpga_spi_ids[] = {
|
||
{ .name = "nii-surface-driver", },
|
||
{},
|
||
};
|
||
MODULE_DEVICE_TABLE(spi, nii_fpga_spi_ids);
|
||
|
||
static struct spi_driver nii_surface_driver = {
|
||
.probe = nii_surface_driver_probe,
|
||
.remove = nii_surface_driver_remove,
|
||
.driver = {
|
||
.name = "nii-surface-driver",
|
||
.of_match_table = nii_fpga_of_match,
|
||
},
|
||
.id_table = nii_fpga_spi_ids,
|
||
};
|
||
|
||
module_spi_driver(nii_surface_driver);
|
||
|
||
MODULE_AUTHOR("Sovereign Research Stack <research@sovereign.stack>");
|
||
MODULE_DESCRIPTION("NII Core Surface Driver - Mathematically Defendable NII Core Driver");
|
||
MODULE_LICENSE("GPL v2");
|
||
MODULE_VERSION("1.0");
|