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authorAbhishek Sahu <absahu@codeaurora.org>2018-06-20 12:57:34 +0530
committerMiquel Raynal <miquel.raynal@bootlin.com>2018-07-18 09:24:07 +0200
commit8eab72148808a74535c3322f6ca30aba77d2d4a9 (patch)
tree82a15e78346f59cc84a4d5413776e3ad34603506 /tools/perf/scripts/python/bin/stackcollapse-record
parentmtd: rawnand: qcom: wait for desc completion in all BAM channels (diff)
mtd: rawnand: qcom: erased page detection for uncorrectable errors only
Following is the flow in the HW if controller tries to read erased page: 1. First ECC uncorrectable error will be generated from ECC engine since ECC engine first calculates the ECC with all 0xff and match the calculated ECC with ECC code in OOB (which is again all 0xff). 2. After getting ECC error, erased CW detection logic will be applied which is different for BCH and RS ECC a. For BCH, HW checks if all the bytes in page are 0xff and then it updates the status in separate register NAND_ERASED_CW_DETECT_STATUS. b. For RS ECC, the HW reports the same error when reading an erased CW, but it notifies that it is an erased CW by placing special characters at certain offsets in the buffer. So the erased CW detect status should be checked only if ECC engine generated the uncorrectable error. Currently for all other operational errors also (like TIMEOUT, MPU errors, etc.), the erased CW detect logic is being applied so fix this and return EIO for other operational errors. Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-record')
0 files changed, 0 insertions, 0 deletions
Copyright © 1996 – 2026 Jason A. Donenfeld. All Rights Reverse Engineered.
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/*
 * QEMU Boot Device Implement
 *
 * Copyright (c) 2014 HUAWEI TECHNOLOGIES CO., LTD.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "qemu/osdep.h"
#include "qapi/error.h"
#include "sysemu/sysemu.h"
#include "qapi/visitor.h"
#include "qemu/error-report.h"
#include "sysemu/reset.h"
#include "hw/qdev-core.h"

typedef struct FWBootEntry FWBootEntry;

struct FWBootEntry {
    QTAILQ_ENTRY(FWBootEntry) link;
    int32_t bootindex;
    DeviceState *dev;
    char *suffix;
};

static QTAILQ_HEAD(, FWBootEntry) fw_boot_order =
    QTAILQ_HEAD_INITIALIZER(fw_boot_order);
static QEMUBootSetHandler *boot_set_handler;
static void *boot_set_opaque;

void qemu_register_boot_set(QEMUBootSetHandler *func, void *opaque)
{
    boot_set_handler = func;
    boot_set_opaque = opaque;
}

void qemu_boot_set(const char *boot_order, Error **errp)
{
    Error *local_err = NULL;

    if (!boot_set_handler) {
        error_setg(errp, "no function defined to set boot device list for"
                         " this architecture");
        return;
    }

    validate_bootdevices(boot_order, &local_err);
    if (local_err) {
        error_propagate(errp, local_err);
        return;
    }

    boot_set_handler(boot_set_opaque, boot_order, errp);
}

void validate_bootdevices(const char *devices, Error **errp)
{
    /* We just do some generic consistency checks */
    const char *p;
    int bitmap = 0;

    for (p = devices; *p != '\0'; p++) {
        /* Allowed boot devices are:
         * a-b: floppy disk drives
         * c-f: IDE disk drives
         * g-m: machine implementation dependent drives
         * n-p: network devices
         * It's up to each machine implementation to check if the given boot
         * devices match the actual hardware implementation and firmware
         * features.
         */
        if (*p < 'a' || *p > 'p') {
            error_setg(errp, "Invalid boot device '%c'", *p);
            return;
        }
        if (bitmap & (1 << (*p - 'a'))) {
            error_setg(errp, "Boot device '%c' was given twice", *p);
            return;
        }
        bitmap |= 1 << (*p - 'a');
    }
}

void restore_boot_order(void *opaque)
{
    char *normal_boot_order = opaque;
    static int first = 1;

    /* Restore boot order and remove ourselves after the first boot */
    if (first) {
        first = 0;
        return;
    }

    if (boot_set_handler) {
        qemu_boot_set(normal_boot_order, &error_abort);
    }

    qemu_unregister_reset(restore_boot_order, normal_boot_order);
    g_free(normal_boot_order);
}

void check_boot_index(int32_t bootindex, Error **errp)
{
    FWBootEntry *i;

    if (bootindex >= 0) {
        QTAILQ_FOREACH(i, &fw_boot_order, link) {
            if (i->bootindex == bootindex) {
                error_setg(errp, "The bootindex %d has already been used",
                           bootindex);
                return;
            }
        }
    }
}

void del_boot_device_path(DeviceState *dev, const char *suffix)
{
    FWBootEntry *i;

    if (dev == NULL) {
        return;
    }

    QTAILQ_FOREACH(i, &fw_boot_order, link) {
        if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
             i->dev == dev) {
            QTAILQ_REMOVE(&fw_boot_order, i, link);
            g_free(i->suffix);
            g_free(i);

            break;
        }
    }
}

void add_boot_device_path(int32_t bootindex, DeviceState *dev,
                          const char *suffix)
{
    FWBootEntry *node, *i;

    if (bootindex < 0) {
        del_boot_device_path(dev, suffix);
        return;
    }

    assert(dev != NULL || suffix != NULL);

    del_boot_device_path(dev, suffix);

    node = g_malloc0(sizeof(FWBootEntry));
    node->bootindex = bootindex;
    node->suffix = g_strdup(suffix);
    node->dev = dev;

    QTAILQ_FOREACH(i, &fw_boot_order, link) {
        if (i->bootindex == bootindex) {
            error_report("Two devices with same boot index %d", bootindex);
            exit(1);
        } else if (i->bootindex < bootindex) {
            continue;
        }
        QTAILQ_INSERT_BEFORE(i, node, link);
        return;
    }
    QTAILQ_INSERT_TAIL(&fw_boot_order, node, link);
}

DeviceState *get_boot_device(uint32_t position)
{
    uint32_t counter = 0;
    FWBootEntry *i = NULL;
    DeviceState *res = NULL;

    if (!QTAILQ_EMPTY(&fw_boot_order)) {
        QTAILQ_FOREACH(i, &fw_boot_order, link) {
            if (counter == position) {
                res = i->dev;
                break;
            }
            counter++;
        }
    }
    return res;
}

/*
 * This function returns null terminated string that consist of new line
 * separated device paths.
 *
 * memory pointed by "size" is assigned total length of the array in bytes
 *
 */
char *get_boot_devices_list(size_t *size, bool ignore_suffixes)
{
    FWBootEntry *i;
    size_t total = 0;
    char *list = NULL;

    QTAILQ_FOREACH(i, &fw_boot_order, link) {
        char *devpath = NULL,  *suffix = NULL;
        char *bootpath;
        char *d;
        size_t len;

        if (i->dev) {
            devpath = qdev_get_fw_dev_path(i->dev);
            assert(devpath);
        }

        if (!ignore_suffixes) {
            if (i->dev) {
                d = qdev_get_own_fw_dev_path_from_handler(i->dev->parent_bus,
                                                          i->dev);
                if (d) {
                    assert(!i->suffix);
                    suffix = d;
                } else {
                    suffix = g_strdup(i->suffix);
                }
            } else {
                suffix = g_strdup(i->suffix);
            }
        }

        bootpath = g_strdup_printf("%s%s",
                                   devpath ? devpath : "",
                                   suffix ? suffix : "");
        g_free(devpath);
        g_free(suffix);

        if (total) {
            list[total-1] = '\n';
        }
        len = strlen(bootpath) + 1;
        list = g_realloc(list, total + len);
        memcpy(&list[total], bootpath, len);
        total += len;
        g_free(bootpath);
    }

    *size = total;

    if (boot_strict && *size > 0) {
        list[total-1] = '\n';
        list = g_realloc(list, total + 5);
        memcpy(&list[total], "HALT", 5);
        *size = total + 5;
    }
    return list;
}

typedef struct {
    int32_t *bootindex;
    const char *suffix;
    DeviceState *dev;
} BootIndexProperty;

static void device_get_bootindex(Object *obj, Visitor *v, const char *name,
                                 void *opaque, Error **errp)
{
    BootIndexProperty *prop = opaque;
    visit_type_int32(v, name, prop->bootindex, errp);
}

static void device_set_bootindex(Object *obj, Visitor *v, const char *name,
                                 void *opaque, Error **errp)
{
    BootIndexProperty *prop = opaque;
    int32_t boot_index;
    Error *local_err = NULL;

    visit_type_int32(v, name, &boot_index, &local_err);
    if (local_err) {
        goto out;
    }
    /* check whether bootindex is present in fw_boot_order list  */
    check_boot_index(boot_index, &local_err);
    if (local_err) {
        goto out;
    }
    /* change bootindex to a new one */
    *prop->bootindex = boot_index;

    add_boot_device_path(*prop->bootindex, prop->dev, prop->suffix);

out:
    error_propagate(errp, local_err);
}

static void property_release_bootindex(Object *obj, const char *name,
                                       void *opaque)

{
    BootIndexProperty *prop = opaque;

    del_boot_device_path(prop->dev, prop->suffix);
    g_free(prop);
}

void device_add_bootindex_property(Object *obj, int32_t *bootindex,
                                   const char *name, const char *suffix,
                                   DeviceState *dev, Error **errp)
{
    Error *local_err = NULL;
    BootIndexProperty *prop = g_malloc0(sizeof(*prop));

    prop->bootindex = bootindex;
    prop->suffix = suffix;
    prop->dev = dev;

    object_property_add(obj, name, "int32",
                        device_get_bootindex,
                        device_set_bootindex,
                        property_release_bootindex,
                        prop, &local_err);

    if (local_err) {
        error_propagate(errp, local_err);
        g_free(prop);
        return;
    }
    /* initialize devices' bootindex property to -1 */
    object_property_set_int(obj, -1, name, NULL);
}