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d34b42ffb1
Add initial support for correctable error handling which is serviced using system controller event. Currently we only log the errors in dmesg but this serves as a foundation for RAS infrastructure and will be further extended to facilitate other RAS features. Signed-off-by: Raag Jadav <raag.jadav@intel.com> Reviewed-by: Mallesh Koujalagi <mallesh.koujalagi@intel.com> Reviewed-by: Riana Tauro <riana.tauro@intel.com> Link: https://patch.msgid.link/20260428054826.1202076-4-raag.jadav@intel.com Signed-off-by: Riana Tauro <riana.tauro@intel.com>
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2026 Intel Corporation
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*/
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#include "xe_device.h"
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#include "xe_irq.h"
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#include "xe_printk.h"
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#include "xe_ras.h"
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#include "xe_sysctrl.h"
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#include "xe_sysctrl_event_types.h"
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#include "xe_sysctrl_mailbox.h"
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#include "xe_sysctrl_mailbox_types.h"
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static void get_pending_event(struct xe_sysctrl *sc, struct xe_sysctrl_mailbox_command *command)
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{
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struct xe_sysctrl_event_response *response = command->data_out;
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struct xe_device *xe = sc_to_xe(sc);
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u32 count = XE_SYSCTRL_EVENT_FLOOD;
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size_t len;
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int ret;
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do {
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memset(response, 0, sizeof(*response));
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ret = xe_sysctrl_send_command(sc, command, &len);
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if (ret) {
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xe_err(xe, "sysctrl: failed to get pending event %d\n", ret);
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return;
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}
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if (len != sizeof(*response)) {
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xe_err(xe, "sysctrl: unexpected event response length %zu (expected %zu)\n",
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len, sizeof(*response));
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return;
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}
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if (response->event == XE_SYSCTRL_EVENT_THRESHOLD_CROSSED)
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xe_ras_counter_threshold_crossed(xe, response);
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else
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xe_warn(xe, "sysctrl: unexpected event %#x\n", response->event);
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if (!--count) {
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xe_err(xe, "sysctrl: event flooding\n");
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return;
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}
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xe_dbg(xe, "sysctrl: %u events pending\n", response->count);
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} while (response->count);
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}
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static void event_request_prepare(struct xe_device *xe, struct xe_sysctrl_app_msg_hdr *header,
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struct xe_sysctrl_event_request *request)
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{
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struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
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header->data = REG_FIELD_PREP(APP_HDR_GROUP_ID_MASK, XE_SYSCTRL_GROUP_GFSP) |
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REG_FIELD_PREP(APP_HDR_COMMAND_MASK, XE_SYSCTRL_CMD_GET_PENDING_EVENT);
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request->vector = xe_device_has_msix(xe) ? XE_IRQ_DEFAULT_MSIX : 0;
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request->fn = PCI_FUNC(pdev->devfn);
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}
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/**
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* xe_sysctrl_event() - Handler for System Controller events
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* @sc: System Controller instance
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*
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* Handle events generated by System Controller.
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*/
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void xe_sysctrl_event(struct xe_sysctrl *sc)
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{
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struct xe_sysctrl_mailbox_command command = {};
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struct xe_sysctrl_event_response response = {};
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struct xe_sysctrl_event_request request = {};
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struct xe_sysctrl_app_msg_hdr header = {};
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xe_device_assert_mem_access(sc_to_xe(sc));
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event_request_prepare(sc_to_xe(sc), &header, &request);
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command.header = header;
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command.data_in = &request;
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command.data_in_len = sizeof(request);
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command.data_out = &response;
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command.data_out_len = sizeof(response);
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guard(mutex)(&sc->event_lock);
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get_pending_event(sc, &command);
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}
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