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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2023-2024 Intel Corporation
4 */
5
6#include "abi/guc_actions_sriov_abi.h"
7#include "abi/guc_messages_abi.h"
8
9#include "xe_gt_sriov_pf_config.h"
10#include "xe_gt_sriov_pf_helpers.h"
11#include "xe_gt_sriov_pf_monitor.h"
12#include "xe_gt_sriov_printk.h"
13#include "xe_guc_klv_helpers.h"
14#include "xe_guc_klv_thresholds_set.h"
15
16/**
17 * xe_gt_sriov_pf_monitor_flr - Cleanup VF data after VF FLR.
18 * @gt: the &xe_gt
19 * @vfid: the VF identifier
20 *
21 * On FLR this function will reset all event data related to the VF.
22 * This function is for PF only.
23 */
24void xe_gt_sriov_pf_monitor_flr(struct xe_gt *gt, u32 vfid)
25{
26 int e;
27
28 xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
29 xe_gt_sriov_pf_assert_vfid(gt, vfid);
30
31 for (e = 0; e < XE_GUC_KLV_NUM_THRESHOLDS; e++)
32 gt->sriov.pf.vfs[vfid].monitor.guc.events[e] = 0;
33}
34
35static void pf_update_event_counter(struct xe_gt *gt, u32 vfid,
36 enum xe_guc_klv_threshold_index e)
37{
38 xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
39 xe_gt_assert(gt, e < XE_GUC_KLV_NUM_THRESHOLDS);
40
41 gt->sriov.pf.vfs[vfid].monitor.guc.events[e]++;
42}
43
44static int pf_handle_vf_threshold_event(struct xe_gt *gt, u32 vfid, u32 threshold)
45{
46 char origin[8];
47 int e;
48
49 e = xe_guc_klv_threshold_key_to_index(threshold);
50 xe_sriov_function_name(vfid, origin, sizeof(origin));
51
52 /* was there a new KEY added that we missed? */
53 if (unlikely(e < 0)) {
54 xe_gt_sriov_notice(gt, "unknown threshold key %#x reported for %s\n",
55 threshold, origin);
56 return -ENOTCONN;
57 }
58
59 xe_gt_sriov_dbg(gt, "%s exceeded threshold %u %s\n",
60 origin, xe_gt_sriov_pf_config_get_threshold(gt, vfid, e),
61 xe_guc_klv_key_to_string(threshold));
62
63 pf_update_event_counter(gt, vfid, e);
64
65 return 0;
66}
67
68/**
69 * xe_gt_sriov_pf_monitor_process_guc2pf - Handle adverse event notification from the GuC.
70 * @gt: the &xe_gt
71 * @msg: G2H event message
72 * @len: length of the message
73 *
74 * This function is intended for PF only.
75 *
76 * Return: 0 on success or a negative error code on failure.
77 */
78int xe_gt_sriov_pf_monitor_process_guc2pf(struct xe_gt *gt, const u32 *msg, u32 len)
79{
80 struct xe_device *xe = gt_to_xe(gt);
81 u32 vfid;
82 u32 threshold;
83
84 xe_gt_assert(gt, len >= GUC_HXG_MSG_MIN_LEN);
85 xe_gt_assert(gt, FIELD_GET(GUC_HXG_MSG_0_ORIGIN, msg[0]) == GUC_HXG_ORIGIN_GUC);
86 xe_gt_assert(gt, FIELD_GET(GUC_HXG_MSG_0_TYPE, msg[0]) == GUC_HXG_TYPE_EVENT);
87 xe_gt_assert(gt, FIELD_GET(GUC_HXG_EVENT_MSG_0_ACTION, msg[0]) ==
88 GUC_ACTION_GUC2PF_ADVERSE_EVENT);
89
90 if (unlikely(!IS_SRIOV_PF(xe)))
91 return -EPROTO;
92
93 if (unlikely(FIELD_GET(GUC2PF_ADVERSE_EVENT_EVENT_MSG_0_MBZ, msg[0])))
94 return -EPFNOSUPPORT;
95
96 if (unlikely(len < GUC2PF_ADVERSE_EVENT_EVENT_MSG_LEN))
97 return -EPROTO;
98
99 vfid = FIELD_GET(GUC2PF_ADVERSE_EVENT_EVENT_MSG_1_VFID, msg[1]);
100 threshold = FIELD_GET(GUC2PF_ADVERSE_EVENT_EVENT_MSG_2_THRESHOLD, msg[2]);
101
102 if (unlikely(vfid > xe_gt_sriov_pf_get_totalvfs(gt)))
103 return -EINVAL;
104
105 return pf_handle_vf_threshold_event(gt, vfid, threshold);
106}
107
108/**
109 * xe_gt_sriov_pf_monitor_print_events - Print adverse events counters.
110 * @gt: the &xe_gt to print events from
111 * @p: the &drm_printer
112 *
113 * Print adverse events counters for all VFs.
114 * VFs with no events are not printed.
115 *
116 * This function can only be called on PF.
117 */
118void xe_gt_sriov_pf_monitor_print_events(struct xe_gt *gt, struct drm_printer *p)
119{
120 unsigned int n, total_vfs = xe_gt_sriov_pf_get_totalvfs(gt);
121 const struct xe_gt_sriov_monitor *data;
122 int e;
123
124 xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
125
126 for (n = 1; n <= total_vfs; n++) {
127 data = >->sriov.pf.vfs[n].monitor;
128
129 for (e = 0; e < XE_GUC_KLV_NUM_THRESHOLDS; e++)
130 if (data->guc.events[e])
131 break;
132
133 /* skip empty unless in debug mode */
134 if (e >= XE_GUC_KLV_NUM_THRESHOLDS &&
135 !IS_ENABLED(CONFIG_DRM_XE_DEBUG_SRIOV))
136 continue;
137
138#define __format(...) "%s:%u "
139#define __value(TAG, NAME, ...) , #NAME, data->guc.events[MAKE_XE_GUC_KLV_THRESHOLD_INDEX(TAG)]
140
141 drm_printf(p, "VF%u:\t" MAKE_XE_GUC_KLV_THRESHOLDS_SET(__format) "\n",
142 n MAKE_XE_GUC_KLV_THRESHOLDS_SET(__value));
143
144#undef __format
145#undef __value
146 }
147}