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}