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stp: vendor-style per-port config + status (path cost, p2p, designated info)

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Bring the Spanning Tree page in line with a typical managed switch's
per-port panel. Configuration gains the full-range path cost (raw
0..200000000, 0 = auto, replacing the old 1000x-scaled byte), a
point-to-point admin control (auto/on/off), and the priority is now a
0..240 step-16 dropdown. A new status table shows, per port, the Port
State, Role, Designated Bridge / Port ID / Cost (learned from received
BPDUs, kept per port and aged via the BPDU age), Operational Edge and
Operational Point-to-Point.

The designated fields fall back to presenting this switch as the
segment's designated bridge when no fresh BPDU has been heard (so a
quiet port shows our own bridge-id, as the vendor UIs do). /stp.json
carries the packed hex fields plus our own MAC for that fallback.

Space: reclaim BANK2 for the above by moving rtl837x_pins to HOME and
compacting leds_dump into a register-address table (~800B); bandwidth
returns to BANK1. No BANK3 - hardware-verified that PSBANK > 2 crashes
this SoC at boot (a bricked unit and an SPI-programmer recovery earlier
today); a warning to that effect is now in rtl837x_lldp.c.

Hardware-verified: cost 200000000 and p2p off round-trip through the CLI
and JSON, the status table populates correctly with STP enabled (all
ports Forwarding/Designated, oper-edge and oper-p2p True), LACP 3f/3f
and the LAN unaffected.

(cherry picked from commit 2ec62072f061dc9e78bc821ba1c297cb6819e206)
This commit is contained in:
d00f
2026-08-04 03:28:07 +02:00
parent 6fcb8ef11f
commit 7ec0286d69
7 changed files with 144 additions and 41 deletions
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rtl837x_stp.h
+9 -1
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@@ -39,7 +39,15 @@ extern __xdata uint8_t stp_failsafe_tripped; /* max BPDUs per port per second (
extern __xdata uint8_t stp_pflags[10];
extern __xdata uint32_t stp_pcost[10]; /* path cost; 0 = auto (20000) */
extern __xdata uint8_t stp_pprio[10]; /* port priority (default 0x80) */
extern __xdata uint8_t stp_pprio[10];
extern __xdata uint8_t stp_pp2p[10]; /* admin point-to-point: 0 auto, 1 on, 2 off */
/* Last-heard designated info per port (from received BPDUs); consult
* stp_bpdu_age to decide whether it is still current. */
extern __xdata struct bridge stp_dbridge[10];
extern __xdata uint16_t stp_dpid[10];
extern __xdata uint32_t stp_dcost[10];
extern __xdata uint16_t stp_bpdu_age[10]; /* ticks since a BPDU was heard */ /* port priority (default 0x80) */
/* ---- Status, exposed read-only for the web UI (send_stp) ---- */
extern __xdata struct bridge root_bridge;