cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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komeda_event.c (4352B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * (C) COPYRIGHT 2019 ARM Limited. All rights reserved.
      4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
      5 *
      6 */
      7#include <drm/drm_atomic.h>
      8#include <drm/drm_print.h>
      9
     10#include "komeda_dev.h"
     11
     12struct komeda_str {
     13	char *str;
     14	u32 sz;
     15	u32 len;
     16};
     17
     18/* return 0 on success,  < 0 on no space.
     19 */
     20__printf(2, 3)
     21static int komeda_sprintf(struct komeda_str *str, const char *fmt, ...)
     22{
     23	va_list args;
     24	int num, free_sz;
     25	int err;
     26
     27	free_sz = str->sz - str->len - 1;
     28	if (free_sz <= 0)
     29		return -ENOSPC;
     30
     31	va_start(args, fmt);
     32
     33	num = vsnprintf(str->str + str->len, free_sz, fmt, args);
     34
     35	va_end(args);
     36
     37	if (num < free_sz) {
     38		str->len += num;
     39		err = 0;
     40	} else {
     41		str->len = str->sz - 1;
     42		err = -ENOSPC;
     43	}
     44
     45	return err;
     46}
     47
     48static void evt_sprintf(struct komeda_str *str, u64 evt, const char *msg)
     49{
     50	if (evt)
     51		komeda_sprintf(str, msg);
     52}
     53
     54static void evt_str(struct komeda_str *str, u64 events)
     55{
     56	if (events == 0ULL) {
     57		komeda_sprintf(str, "None");
     58		return;
     59	}
     60
     61	evt_sprintf(str, events & KOMEDA_EVENT_VSYNC, "VSYNC|");
     62	evt_sprintf(str, events & KOMEDA_EVENT_FLIP, "FLIP|");
     63	evt_sprintf(str, events & KOMEDA_EVENT_EOW, "EOW|");
     64	evt_sprintf(str, events & KOMEDA_EVENT_MODE, "OP-MODE|");
     65
     66	evt_sprintf(str, events & KOMEDA_EVENT_URUN, "UNDERRUN|");
     67	evt_sprintf(str, events & KOMEDA_EVENT_OVR, "OVERRUN|");
     68
     69	/* GLB error */
     70	evt_sprintf(str, events & KOMEDA_ERR_MERR, "MERR|");
     71	evt_sprintf(str, events & KOMEDA_ERR_FRAMETO, "FRAMETO|");
     72
     73	/* DOU error */
     74	evt_sprintf(str, events & KOMEDA_ERR_DRIFTTO, "DRIFTTO|");
     75	evt_sprintf(str, events & KOMEDA_ERR_FRAMETO, "FRAMETO|");
     76	evt_sprintf(str, events & KOMEDA_ERR_TETO, "TETO|");
     77	evt_sprintf(str, events & KOMEDA_ERR_CSCE, "CSCE|");
     78
     79	/* LPU errors or events */
     80	evt_sprintf(str, events & KOMEDA_EVENT_IBSY, "IBSY|");
     81	evt_sprintf(str, events & KOMEDA_EVENT_EMPTY, "EMPTY|");
     82	evt_sprintf(str, events & KOMEDA_EVENT_FULL, "FULL|");
     83	evt_sprintf(str, events & KOMEDA_ERR_AXIE, "AXIE|");
     84	evt_sprintf(str, events & KOMEDA_ERR_ACE0, "ACE0|");
     85	evt_sprintf(str, events & KOMEDA_ERR_ACE1, "ACE1|");
     86	evt_sprintf(str, events & KOMEDA_ERR_ACE2, "ACE2|");
     87	evt_sprintf(str, events & KOMEDA_ERR_ACE3, "ACE3|");
     88
     89	/* LPU TBU errors*/
     90	evt_sprintf(str, events & KOMEDA_ERR_TCF, "TCF|");
     91	evt_sprintf(str, events & KOMEDA_ERR_TTNG, "TTNG|");
     92	evt_sprintf(str, events & KOMEDA_ERR_TITR, "TITR|");
     93	evt_sprintf(str, events & KOMEDA_ERR_TEMR, "TEMR|");
     94	evt_sprintf(str, events & KOMEDA_ERR_TTF, "TTF|");
     95
     96	/* CU errors*/
     97	evt_sprintf(str, events & KOMEDA_ERR_CPE, "COPROC|");
     98	evt_sprintf(str, events & KOMEDA_ERR_ZME, "ZME|");
     99	evt_sprintf(str, events & KOMEDA_ERR_CFGE, "CFGE|");
    100	evt_sprintf(str, events & KOMEDA_ERR_TEMR, "TEMR|");
    101
    102	if (str->len > 0 && (str->str[str->len - 1] == '|')) {
    103		str->str[str->len - 1] = 0;
    104		str->len--;
    105	}
    106}
    107
    108static bool is_new_frame(struct komeda_events *a)
    109{
    110	return (a->pipes[0] | a->pipes[1]) &
    111	       (KOMEDA_EVENT_FLIP | KOMEDA_EVENT_EOW);
    112}
    113
    114void komeda_print_events(struct komeda_events *evts, struct drm_device *dev)
    115{
    116	u64 print_evts = 0;
    117	static bool en_print = true;
    118	struct komeda_dev *mdev = dev->dev_private;
    119	u16 const err_verbosity = mdev->err_verbosity;
    120	u64 evts_mask = evts->global | evts->pipes[0] | evts->pipes[1];
    121
    122	/* reduce the same msg print, only print the first evt for one frame */
    123	if (evts->global || is_new_frame(evts))
    124		en_print = true;
    125	if (!(err_verbosity & KOMEDA_DEV_PRINT_DISABLE_RATELIMIT) && !en_print)
    126		return;
    127
    128	if (err_verbosity & KOMEDA_DEV_PRINT_ERR_EVENTS)
    129		print_evts |= KOMEDA_ERR_EVENTS;
    130	if (err_verbosity & KOMEDA_DEV_PRINT_WARN_EVENTS)
    131		print_evts |= KOMEDA_WARN_EVENTS;
    132	if (err_verbosity & KOMEDA_DEV_PRINT_INFO_EVENTS)
    133		print_evts |= KOMEDA_INFO_EVENTS;
    134
    135	if (evts_mask & print_evts) {
    136		char msg[256];
    137		struct komeda_str str;
    138		struct drm_printer p = drm_info_printer(dev->dev);
    139
    140		str.str = msg;
    141		str.sz  = sizeof(msg);
    142		str.len = 0;
    143
    144		komeda_sprintf(&str, "gcu: ");
    145		evt_str(&str, evts->global);
    146		komeda_sprintf(&str, ", pipes[0]: ");
    147		evt_str(&str, evts->pipes[0]);
    148		komeda_sprintf(&str, ", pipes[1]: ");
    149		evt_str(&str, evts->pipes[1]);
    150
    151		DRM_ERROR("err detect: %s\n", msg);
    152		if ((err_verbosity & KOMEDA_DEV_PRINT_DUMP_STATE_ON_EVENT) &&
    153		    (evts_mask & (KOMEDA_ERR_EVENTS | KOMEDA_WARN_EVENTS)))
    154			drm_state_dump(dev, &p);
    155
    156		en_print = false;
    157	}
    158}