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// SPDX-License-Identifier: MIT
/*
* Copyright © 2026 Intel Corporation
*/
#include "xe_device.h"
#include "xe_irq.h"
#include "xe_printk.h"
#include "xe_ras.h"
#include "xe_sysctrl.h"
#include "xe_sysctrl_event_types.h"
#include "xe_sysctrl_mailbox.h"
#include "xe_sysctrl_mailbox_types.h"
static void get_pending_event(struct xe_sysctrl *sc, struct xe_sysctrl_mailbox_command *command)
{
struct xe_sysctrl_event_response *response = command->data_out;
struct xe_device *xe = sc_to_xe(sc);
u32 count = XE_SYSCTRL_EVENT_FLOOD;
size_t len;
int ret;
do {
memset(response, 0, sizeof(*response));
ret = xe_sysctrl_send_command(sc, command, &len);
if (ret) {
xe_err(xe, "sysctrl: failed to get pending event %d\n", ret);
return;
}
if (len != sizeof(*response)) {
xe_err(xe, "sysctrl: unexpected event response length %zu (expected %zu)\n",
len, sizeof(*response));
return;
}
if (response->event == XE_SYSCTRL_EVENT_THRESHOLD_CROSSED)
xe_ras_counter_threshold_crossed(xe, response);
else
xe_warn(xe, "sysctrl: unexpected event %#x\n", response->event);
if (!--count) {
xe_err(xe, "sysctrl: event flooding\n");
return;
}
xe_dbg(xe, "sysctrl: %u events pending\n", response->count);
} while (response->count);
}
static void event_request_prepare(struct xe_device *xe, struct xe_sysctrl_app_msg_hdr *header,
struct xe_sysctrl_event_request *request)
{
struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
header->data = REG_FIELD_PREP(APP_HDR_GROUP_ID_MASK, XE_SYSCTRL_GROUP_GFSP) |
REG_FIELD_PREP(APP_HDR_COMMAND_MASK, XE_SYSCTRL_CMD_GET_PENDING_EVENT);
request->vector = xe_device_has_msix(xe) ? XE_IRQ_DEFAULT_MSIX : 0;
request->fn = PCI_FUNC(pdev->devfn);
}
/**
* xe_sysctrl_event() - Handler for System Controller events
* @sc: System Controller instance
*
* Handle events generated by System Controller.
*/
void xe_sysctrl_event(struct xe_sysctrl *sc)
{
struct xe_sysctrl_mailbox_command command = {};
struct xe_sysctrl_event_response response = {};
struct xe_sysctrl_event_request request = {};
struct xe_sysctrl_app_msg_hdr header = {};
xe_device_assert_mem_access(sc_to_xe(sc));
event_request_prepare(sc_to_xe(sc), &header, &request);
command.header = header;
command.data_in = &request;
command.data_in_len = sizeof(request);
command.data_out = &response;
command.data_out_len = sizeof(response);
guard(mutex)(&sc->event_lock);
get_pending_event(sc, &command);
}
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