Revision 3e1a0699095803e53072699a4a1485af7744601d authored by Joe Thornber on 03 March 2014, 16:03:26 UTC, committed by Mike Snitzer on 05 March 2014, 20:26:58 UTC
Ideally a thin pool would never run out of data space; the low water mark would trigger userland to extend the pool before we completely run out of space. However, many small random IOs to unprovisioned space can consume data space at an alarming rate. Adjust your low water mark if you're frequently seeing "out-of-data-space" mode. Before this fix, if data space ran out the pool would be put in PM_READ_ONLY mode which also aborted the pool's current metadata transaction (data loss for any changes in the transaction). This had a side-effect of needlessly compromising data consistency. And retry of queued unserviceable bios, once the data pool was resized, could initiate changes to potentially inconsistent pool metadata. Now when the pool's data space is exhausted transition to a new pool mode (PM_OUT_OF_DATA_SPACE) that allows metadata to be changed but data may not be allocated. This allows users to remove thin volumes or discard data to recover data space. The pool is no longer put in PM_READ_ONLY mode in response to the pool running out of data space. And PM_READ_ONLY mode no longer aborts the pool's current metadata transaction. Also, set_pool_mode() will now notify userspace when the pool mode is changed. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
1 parent 07f2b6e
tps65090-regulator.c
/*
* Regulator driver for tps65090 power management chip.
*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/tps65090.h>
struct tps65090_regulator {
struct device *dev;
struct regulator_desc *desc;
struct regulator_dev *rdev;
};
static struct regulator_ops tps65090_ext_control_ops = {
};
static struct regulator_ops tps65090_reg_contol_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static struct regulator_ops tps65090_ldo_ops = {
};
#define tps65090_REG_DESC(_id, _sname, _en_reg, _ops) \
{ \
.name = "TPS65090_RAILS"#_id, \
.supply_name = _sname, \
.id = TPS65090_REGULATOR_##_id, \
.ops = &_ops, \
.enable_reg = _en_reg, \
.enable_mask = BIT(0), \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
static struct regulator_desc tps65090_regulator_desc[] = {
tps65090_REG_DESC(DCDC1, "vsys1", 0x0C, tps65090_reg_contol_ops),
tps65090_REG_DESC(DCDC2, "vsys2", 0x0D, tps65090_reg_contol_ops),
tps65090_REG_DESC(DCDC3, "vsys3", 0x0E, tps65090_reg_contol_ops),
tps65090_REG_DESC(FET1, "infet1", 0x0F, tps65090_reg_contol_ops),
tps65090_REG_DESC(FET2, "infet2", 0x10, tps65090_reg_contol_ops),
tps65090_REG_DESC(FET3, "infet3", 0x11, tps65090_reg_contol_ops),
tps65090_REG_DESC(FET4, "infet4", 0x12, tps65090_reg_contol_ops),
tps65090_REG_DESC(FET5, "infet5", 0x13, tps65090_reg_contol_ops),
tps65090_REG_DESC(FET6, "infet6", 0x14, tps65090_reg_contol_ops),
tps65090_REG_DESC(FET7, "infet7", 0x15, tps65090_reg_contol_ops),
tps65090_REG_DESC(LDO1, "vsys-l1", 0, tps65090_ldo_ops),
tps65090_REG_DESC(LDO2, "vsys-l2", 0, tps65090_ldo_ops),
};
static inline bool is_dcdc(int id)
{
switch (id) {
case TPS65090_REGULATOR_DCDC1:
case TPS65090_REGULATOR_DCDC2:
case TPS65090_REGULATOR_DCDC3:
return true;
default:
return false;
}
}
static int tps65090_config_ext_control(
struct tps65090_regulator *ri, bool enable)
{
int ret;
struct device *parent = ri->dev->parent;
unsigned int reg_en_reg = ri->desc->enable_reg;
if (enable)
ret = tps65090_set_bits(parent, reg_en_reg, 1);
else
ret = tps65090_clr_bits(parent, reg_en_reg, 1);
if (ret < 0)
dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg);
return ret;
}
static int tps65090_regulator_disable_ext_control(
struct tps65090_regulator *ri,
struct tps65090_regulator_plat_data *tps_pdata)
{
int ret = 0;
struct device *parent = ri->dev->parent;
unsigned int reg_en_reg = ri->desc->enable_reg;
/*
* First enable output for internal control if require.
* And then disable external control.
*/
if (tps_pdata->reg_init_data->constraints.always_on ||
tps_pdata->reg_init_data->constraints.boot_on) {
ret = tps65090_set_bits(parent, reg_en_reg, 0);
if (ret < 0) {
dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg);
return ret;
}
}
return tps65090_config_ext_control(ri, false);
}
static void tps65090_configure_regulator_config(
struct tps65090_regulator_plat_data *tps_pdata,
struct regulator_config *config)
{
if (gpio_is_valid(tps_pdata->gpio)) {
int gpio_flag = GPIOF_OUT_INIT_LOW;
if (tps_pdata->reg_init_data->constraints.always_on ||
tps_pdata->reg_init_data->constraints.boot_on)
gpio_flag = GPIOF_OUT_INIT_HIGH;
config->ena_gpio = tps_pdata->gpio;
config->ena_gpio_flags = gpio_flag;
}
}
#ifdef CONFIG_OF
static struct of_regulator_match tps65090_matches[] = {
{ .name = "dcdc1", },
{ .name = "dcdc2", },
{ .name = "dcdc3", },
{ .name = "fet1", },
{ .name = "fet2", },
{ .name = "fet3", },
{ .name = "fet4", },
{ .name = "fet5", },
{ .name = "fet6", },
{ .name = "fet7", },
{ .name = "ldo1", },
{ .name = "ldo2", },
};
static struct tps65090_platform_data *tps65090_parse_dt_reg_data(
struct platform_device *pdev,
struct of_regulator_match **tps65090_reg_matches)
{
struct tps65090_platform_data *tps65090_pdata;
struct device_node *np = pdev->dev.parent->of_node;
struct device_node *regulators;
int idx = 0, ret;
struct tps65090_regulator_plat_data *reg_pdata;
tps65090_pdata = devm_kzalloc(&pdev->dev, sizeof(*tps65090_pdata),
GFP_KERNEL);
if (!tps65090_pdata) {
dev_err(&pdev->dev, "Memory alloc for tps65090_pdata failed\n");
return ERR_PTR(-ENOMEM);
}
reg_pdata = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX *
sizeof(*reg_pdata), GFP_KERNEL);
if (!reg_pdata) {
dev_err(&pdev->dev, "Memory alloc for reg_pdata failed\n");
return ERR_PTR(-ENOMEM);
}
regulators = of_get_child_by_name(np, "regulators");
if (!regulators) {
dev_err(&pdev->dev, "regulator node not found\n");
return ERR_PTR(-ENODEV);
}
ret = of_regulator_match(&pdev->dev, regulators, tps65090_matches,
ARRAY_SIZE(tps65090_matches));
if (ret < 0) {
dev_err(&pdev->dev,
"Error parsing regulator init data: %d\n", ret);
return ERR_PTR(ret);
}
*tps65090_reg_matches = tps65090_matches;
for (idx = 0; idx < ARRAY_SIZE(tps65090_matches); idx++) {
struct regulator_init_data *ri_data;
struct tps65090_regulator_plat_data *rpdata;
rpdata = ®_pdata[idx];
ri_data = tps65090_matches[idx].init_data;
if (!ri_data || !tps65090_matches[idx].of_node)
continue;
rpdata->reg_init_data = ri_data;
rpdata->enable_ext_control = of_property_read_bool(
tps65090_matches[idx].of_node,
"ti,enable-ext-control");
if (rpdata->enable_ext_control)
rpdata->gpio = of_get_named_gpio(np,
"dcdc-ext-control-gpios", 0);
tps65090_pdata->reg_pdata[idx] = rpdata;
}
return tps65090_pdata;
}
#else
static inline struct tps65090_platform_data *tps65090_parse_dt_reg_data(
struct platform_device *pdev,
struct of_regulator_match **tps65090_reg_matches)
{
*tps65090_reg_matches = NULL;
return NULL;
}
#endif
static int tps65090_regulator_probe(struct platform_device *pdev)
{
struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent);
struct tps65090_regulator *ri = NULL;
struct regulator_config config = { };
struct regulator_dev *rdev;
struct tps65090_regulator_plat_data *tps_pdata;
struct tps65090_regulator *pmic;
struct tps65090_platform_data *tps65090_pdata;
struct of_regulator_match *tps65090_reg_matches = NULL;
int num;
int ret;
dev_dbg(&pdev->dev, "Probing regulator\n");
tps65090_pdata = dev_get_platdata(pdev->dev.parent);
if (!tps65090_pdata && tps65090_mfd->dev->of_node)
tps65090_pdata = tps65090_parse_dt_reg_data(pdev,
&tps65090_reg_matches);
if (IS_ERR_OR_NULL(tps65090_pdata)) {
dev_err(&pdev->dev, "Platform data missing\n");
return tps65090_pdata ? PTR_ERR(tps65090_pdata) : -EINVAL;
}
pmic = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX * sizeof(*pmic),
GFP_KERNEL);
if (!pmic) {
dev_err(&pdev->dev, "mem alloc for pmic failed\n");
return -ENOMEM;
}
for (num = 0; num < TPS65090_REGULATOR_MAX; num++) {
tps_pdata = tps65090_pdata->reg_pdata[num];
ri = &pmic[num];
ri->dev = &pdev->dev;
ri->desc = &tps65090_regulator_desc[num];
/*
* TPS5090 DCDC support the control from external digital input.
* Configure it as per platform data.
*/
if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
if (tps_pdata->enable_ext_control) {
tps65090_configure_regulator_config(
tps_pdata, &config);
ri->desc->ops = &tps65090_ext_control_ops;
} else {
ret = tps65090_regulator_disable_ext_control(
ri, tps_pdata);
if (ret < 0) {
dev_err(&pdev->dev,
"failed disable ext control\n");
return ret;
}
}
}
config.dev = pdev->dev.parent;
config.driver_data = ri;
config.regmap = tps65090_mfd->rmap;
if (tps_pdata)
config.init_data = tps_pdata->reg_init_data;
else
config.init_data = NULL;
if (tps65090_reg_matches)
config.of_node = tps65090_reg_matches[num].of_node;
else
config.of_node = NULL;
rdev = devm_regulator_register(&pdev->dev, ri->desc, &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
ri->desc->name);
return PTR_ERR(rdev);
}
ri->rdev = rdev;
/* Enable external control if it is require */
if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data &&
tps_pdata->enable_ext_control) {
ret = tps65090_config_ext_control(ri, true);
if (ret < 0)
return ret;
}
}
platform_set_drvdata(pdev, pmic);
return 0;
}
static struct platform_driver tps65090_regulator_driver = {
.driver = {
.name = "tps65090-pmic",
.owner = THIS_MODULE,
},
.probe = tps65090_regulator_probe,
};
static int __init tps65090_regulator_init(void)
{
return platform_driver_register(&tps65090_regulator_driver);
}
subsys_initcall(tps65090_regulator_init);
static void __exit tps65090_regulator_exit(void)
{
platform_driver_unregister(&tps65090_regulator_driver);
}
module_exit(tps65090_regulator_exit);
MODULE_DESCRIPTION("tps65090 regulator driver");
MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps65090-pmic");
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...