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Log mmc and sd command failures. Reporting of routine expected errors,

Browse source 
such as timeouts while probing a bus or testing for a feature, is
squelched.  Also, error reporting is limited to 5 events per second,
because when an sdcard goes bad on a low-end embedded board, flooding
the console at high speed isn't helpful.

Original logging code contributed by Michal Meloun, but then I fancied
it up with squelching and ppsratecheck.
This commit is contained in:
Ian Lepore 2014-12-20 04:24:40 +00:00
parent 61bc42f782
commit dc47198f50
1 changed files with 31 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

31
sys/dev/mmc/mmc.c
View file

@ -63,6 +63,7 @@ __FBSDID("$FreeBSD$");
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <dev/mmc/mmcreg.h>
#include <dev/mmc/mmcbrvar.h>
@ -76,8 +77,13 @@ struct mmc_softc {
struct intr_config_hook config_intrhook;
device_t owner;
uint32_t last_rca;
int squelched; /* suppress reporting of (expected) errors */
int log_count;
struct timeval log_time;
};
#define LOG_PPS 5 /* Log no more than 5 errors per second. */
/*
* Per-card data
*/
@ -426,6 +432,13 @@ mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, int retries)
err = cmd->error;
} while (err != MMC_ERR_NONE && retries-- > 0);
if (err != MMC_ERR_NONE && sc->squelched == 0) {
if (ppsratecheck(&sc->log_time, &sc->log_count, LOG_PPS)) {
device_printf(sc->dev, "CMD%d failed, RESULT: %d\n",
cmd->opcode, err);
}
}
return (err);
}
@ -436,6 +449,8 @@ mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca,
struct mmc_command appcmd;
int err;
/* Squelch error reporting at lower levels, we report below. */
sc->squelched++;
do {
memset(&appcmd, 0, sizeof(appcmd));
appcmd.opcode = MMC_APP_CMD;
@ -455,6 +470,14 @@ mmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca,
err = cmd->error;
}
} while (err != MMC_ERR_NONE && retries-- > 0);
sc->squelched--;
if (err != MMC_ERR_NONE && sc->squelched == 0) {
if (ppsratecheck(&sc->log_time, &sc->log_count, LOG_PPS)) {
device_printf(sc->dev, "ACMD%d failed, RESULT: %d\n",
cmd->opcode, err);
}
}
return (err);
}
@ -760,6 +783,7 @@ mmc_test_bus_width(struct mmc_softc *sc)
mmcbr_set_bus_width(sc->dev, bus_width_8);
mmcbr_update_ios(sc->dev);
sc->squelched++; /* Errors are expected, squelch reporting. */
memset(&cmd, 0, sizeof(cmd));
memset(&data, 0, sizeof(data));
cmd.opcode = MMC_BUSTEST_W;
@ -783,6 +807,7 @@ mmc_test_bus_width(struct mmc_softc *sc)
data.len = 8;
data.flags = MMC_DATA_READ;
err = mmc_wait_for_cmd(sc, &cmd, 0);
sc->squelched--;
mmcbr_set_bus_width(sc->dev, bus_width_1);
mmcbr_update_ios(sc->dev);
@ -795,6 +820,7 @@ mmc_test_bus_width(struct mmc_softc *sc)
mmcbr_set_bus_width(sc->dev, bus_width_4);
mmcbr_update_ios(sc->dev);
sc->squelched++; /* Errors are expected, squelch reporting. */
memset(&cmd, 0, sizeof(cmd));
memset(&data, 0, sizeof(data));
cmd.opcode = MMC_BUSTEST_W;
@ -818,6 +844,7 @@ mmc_test_bus_width(struct mmc_softc *sc)
data.len = 4;
data.flags = MMC_DATA_READ;
err = mmc_wait_for_cmd(sc, &cmd, 0);
sc->squelched--;
mmcbr_set_bus_width(sc->dev, bus_width_1);
mmcbr_update_ios(sc->dev);
@ -1270,7 +1297,9 @@ mmc_discover_cards(struct mmc_softc *sc)
if (bootverbose || mmc_debug)
device_printf(sc->dev, "Probing cards\n");
while (1) {
sc->squelched++; /* Errors are expected, squelch reporting. */
err = mmc_all_send_cid(sc, raw_cid);
sc->squelched--;
if (err == MMC_ERR_TIMEOUT)
break;
if (err != MMC_ERR_NONE) {
@ -1536,6 +1565,7 @@ mmc_go_discovery(struct mmc_softc *sc)
/*
* First, try SD modes
*/
sc->squelched++; /* Errors are expected, squelch reporting. */
mmcbr_set_mode(dev, mode_sd);
mmc_power_up(sc);
mmcbr_set_bus_mode(dev, pushpull);
@ -1561,6 +1591,7 @@ mmc_go_discovery(struct mmc_softc *sc)
"MMC probe: OK (OCR: 0x%08x)\n", ocr);
} else if (bootverbose || mmc_debug)
device_printf(sc->dev, "SD probe: OK (OCR: 0x%08x)\n", ocr);
sc->squelched--;
mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr));
if (mmcbr_get_ocr(dev) != 0)