| /*
* sai-power com-warmcat-sai client protocol implementation
*
* Copyright (C) 2019 - 2025 Andy Green <andy@warmcat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*
* This is the part of sai-power that handles communication with sai-server
*/
#include <libwebsockets.h>
#include <string.h>
#include <signal.h>
#include <assert.h>
#include "p-private.h"
/* Map for the "powering up" message we send to the server */
static const lws_struct_map_t lsm_schema_power_state[] = {
LSM_SCHEMA(sai_power_state_t, NULL, lsm_power_state,
"com.warmcat.sai.powerstate"),
};
void
saip_notify_server_power_state(const char *pcon_name, int up, int down)
{
saip_server_link_t *m;
sai_power_state_t ps;
saip_server_t *sps;
/* Find the first (usually only) configured sai-server connection */
if (!power.sai_server_owner.head) {
lwsl_warn("%s: No sai-server configured to notify\n", __func__);
return;
}
sps = lws_container_of(power.sai_server_owner.head, saip_server_t, list);
if (!sps->ss) {
lwsl_warn("%s: Not connected to sai-server to notify\n", __func__);
return;
}
m = (saip_server_link_t *)lws_ss_to_user_object(sps->ss);
memset(&ps, 0, sizeof(ps));
lws_strncpy(ps.host, pcon_name, sizeof(ps.host));
ps.powering_up = (char)up;
ps.powering_down = (char)down;
sai_ss_serialize_queue_helper(sps->ss, &m->bl_pwr_to_srv,
lsm_schema_power_state,
LWS_ARRAY_SIZE(lsm_schema_power_state),
&ps);
}
int
saip_queue_stay_info(saip_server_t *sps)
{
sai_power_managed_builders_t pmb;
struct lwsac *ac = NULL;
saip_server_link_t *m;
int r;
/* lwsl_ss_notice(sps->ss, "@@@@@@@@@@@@@@ sai-power CONNECTED to server"); */
m = (saip_server_link_t *)lws_ss_to_user_object(sps->ss);
memset(&pmb, 0, sizeof(pmb));
/* Send the PCON configuration and connected builders */
lws_start_foreach_dll(struct lws_dll2 *, p, power.sai_pcon_owner.head) {
saip_pcon_t *pc = lws_container_of(p, saip_pcon_t, list);
sai_power_controller_t *pc1 = lwsac_use_zero(&ac, sizeof(*pc1), 2048);
if (pc1 && pc->name) {
lws_strncpy(pc1->name, pc->name, sizeof(pc1->name));
pc1->on = pc->on;
if (pc->depends_on)
lws_strncpy(pc1->depends_on, pc->depends_on, sizeof(pc1->depends_on));
if (pc->type)
lws_strncpy(pc1->type, pc->type, sizeof(pc1->type));
lws_dll2_add_tail(&pc1->list, &pmb.power_controllers);
/* Attach registered builders */
lws_start_foreach_dll(struct lws_dll2 *, p1,
pc->registered_builders_owner.head) {
saip_builder_t *sb = lws_container_of(p1,
saip_builder_t, list);
sai_controlled_builder_t *c = lwsac_use_zero(&ac,
sizeof(*c), 2048);
if (c) {
lws_strncpy(c->name, sb->name, sizeof(c->name));
lws_dll2_add_tail(&c->list,
&pc1->controlled_builders_owner);
}
} lws_end_foreach_dll(p1);
}
} lws_end_foreach_dll(p);
/* The 'builders' list in pmb was for "power managed builders" (legacy).
* We now put builders *inside* power controllers.
* So we leave pmb.builders empty.
*/
r = sai_ss_serialize_queue_helper(sps->ss, &m->bl_pwr_to_srv,
lsm_schema_power_managed_builders,
LWS_ARRAY_SIZE(lsm_schema_power_managed_builders),
&pmb);
lwsac_free(&ac);
return r;
}
static lws_ss_state_return_t
saip_m_rx(void *userobj, const uint8_t *buf, size_t len, int flags)
{
saip_server_link_t *pss = (saip_server_link_t *)userobj;
saip_server_t *sps = (saip_server_t *)lws_ss_opaque_from_user(pss);
lws_struct_args_t a;
struct lejp_ctx ctx;
lwsl_notice("%s: len %d, flags: %d (saip_server_t %p)\n", __func__, (int)len, flags, (void *)sps);
/* lwsl_hexdump_notice(buf, len); */
memset(&a, 0, sizeof(a));
a.map_st[0] = lsm_schema_stay;
a.map_entries_st[0] = LWS_ARRAY_SIZE(lsm_schema_stay);
a.ac_block_size = 512;
lws_struct_json_init_parse(&ctx, NULL, &a);
if (lejp_parse(&ctx, (uint8_t *)buf, (int)len) >= 0 && a.dest) {
sai_stay_t *stay = (sai_stay_t *)a.dest;
// {"schema":"com.warmcat.sai.power.stay","builder_name":"ubuntu_rpi4","stay_on":1}
lwsl_warn("%s: received stay %s: %d\n", __func__, stay->builder_name, stay->stay_on);
/*
* We received a stay request for a builder.
* We need to find which PCON controls this builder and update its manual_stay.
* But wait, 'sai_stay_t' is typically per-builder.
* We should map this back to the PCON.
*/
lws_start_foreach_dll(struct lws_dll2 *, p, power.sai_pcon_owner.head) {
saip_pcon_t *pc = lws_container_of(p, saip_pcon_t, list);
lws_start_foreach_dll(struct lws_dll2 *, b_node, pc->registered_builders_owner.head) {
saip_builder_t *sb = lws_container_of(b_node, saip_builder_t, list);
if (!strcmp(sb->name, stay->builder_name)) {
lwsl_notice("%s: Mapping stay for builder '%s' to PCON '%s'\n",
__func__, sb->name, pc->name);
/* Update PCON stay state */
pc->manual_stay = stay->stay_on;
/* If stay is cleared, schedule power off check */
if (!stay->stay_on)
saip_pcon_start_check();
else {
/* If stay is set, ensure it is on immediately */
saip_switch(pc, 1);
}
goto found;
}
} lws_end_foreach_dll(b_node);
} lws_end_foreach_dll(p);
found:
lwsac_free(&a.ac);
return 0;
}
lwsac_free(&a.ac);
/*
* The old logic parsed comma-separated platform names to determine needed state.
* We are moving away from that. Sai-server should explicitly request power state
* or we should rely on the builder being "needed" implies PCON on.
* Actually, the requirement said: "You can no longer ask that a platform stays on, instead, you ask that the power controller stays on"
* So sai-server might send stay requests for PCONs directly if we update the UI.
* But for now, sai-server logic (s-power.c) sends stay for *builders*.
* So the mapping logic above is correct for transition.
*/
return 0;
}
static lws_ss_state_return_t
saip_m_tx(void *userobj, lws_ss_tx_ordinal_t ord, uint8_t *buf, size_t *len,
int *flags)
{
saip_server_link_t *pss = (saip_server_link_t *)userobj;
lws_ss_state_return_t r;
/*
* helper fills tx with next buflist content, and asks to write again
* if any left.
*/
r = sai_ss_tx_from_buflist_helper(pss->ss, &pss->bl_pwr_to_srv,
buf, len, flags);
if (r == LWSSSSRET_OK)
sai_dump_stderr(buf, *len);
return r;
}
static int
cleanup_on_ss_destroy(struct lws_dll2 *d, void *user)
{
saip_server_link_t *pss = (saip_server_link_t *)user;
saip_server_t *sps = (saip_server_t *)lws_ss_opaque_from_user(pss);
(void)sps;
return 0;
}
static int
cleanup_on_ss_disconnect(struct lws_dll2 *d, void *user)
{
return 0;
}
static lws_ss_state_return_t
saip_m_state(void *userobj, void *sh, lws_ss_constate_t state,
lws_ss_tx_ordinal_t ack)
{
saip_server_link_t *pss = (saip_server_link_t *)userobj;
saip_server_t *sps = (saip_server_t *)lws_ss_opaque_from_user(pss);
const char *pq;
int n;
// lwsl_info("%s: %s, ord 0x%x\n", __func__, lws_ss_state_name(state),
// (unsigned int)ack);
switch (state) {
case LWSSSCS_CREATING:
lwsl_info("%s: binding ss to %p %s\n", __func__, sps, sps->url);
if (lws_ss_set_metadata(sps->ss, "url", sps->url, strlen(sps->url)))
lwsl_warn("%s: unable to set metadata\n", __func__);
pq = sps->url;
while (*pq && (pq[0] != '/' || pq[1] != '/'))
pq++;
if (*pq) {
n = 0;
pq += 2;
while (pq[n] && pq[n] != '/')
n++;
} else {
pq = sps->url;
n = (int)strlen(pq);
}
break;
case LWSSSCS_DESTROYING:
lws_dll2_foreach_safe(&power.sai_server_owner, sps,
cleanup_on_ss_destroy);
break;
case LWSSSCS_CONNECTED:
lwsl_ss_notice(sps->ss, "@@@@@@@@@@@@@@ sai-power CONNECTED to server");
saip_queue_stay_info(sps);
break;
case LWSSSCS_DISCONNECTED:
lws_buflist_destroy_all_segments(&pss->bl_pwr_to_srv);
lwsl_info("%s: DISCONNECTED\n", __func__);
lws_dll2_foreach_safe(&power.sai_server_owner, sps,
cleanup_on_ss_disconnect);
break;
case LWSSSCS_ALL_RETRIES_FAILED:
lwsl_info("%s: LWSSSCS_ALL_RETRIES_FAILED\n", __func__);
return lws_ss_request_tx(sps->ss);
case LWSSSCS_QOS_ACK_REMOTE:
lwsl_info("%s: LWSSSCS_QOS_ACK_REMOTE\n", __func__);
break;
default:
break;
}
return LWSSSSRET_OK;
}
LWS_SS_INFO("sai_power", saip_server_link_t)
.rx = saip_m_rx,
.state = saip_m_state,
.tx = saip_m_tx,
};
|