linux/drivers/acpi/nfit/intel.c
Dan Williams dc370b28c8 nvdimm/region: Move cache management to the region driver
Now that cpu_cache_invalidate_memregion() is generically available, use
it to centralize CPU cache management in the nvdimm region driver.

This trades off removing redundant per-dimm CPU cache flushing with an
opportunistic flush on every region disable event to cover the case of
sensitive dirty data in the cache being written back to media after a
secure erase / overwrite event.

Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166993221550.1995348.16843505129579060258.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2022-12-02 23:52:32 -08:00

750 lines
19 KiB
C

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2018 Intel Corporation. All rights reserved. */
#include <linux/libnvdimm.h>
#include <linux/ndctl.h>
#include <linux/acpi.h>
#include <linux/memregion.h>
#include <asm/smp.h>
#include "intel.h"
#include "nfit.h"
static ssize_t firmware_activate_noidle_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
return sprintf(buf, "%s\n", acpi_desc->fwa_noidle ? "Y" : "N");
}
static ssize_t firmware_activate_noidle_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
ssize_t rc;
bool val;
rc = kstrtobool(buf, &val);
if (rc)
return rc;
if (val != acpi_desc->fwa_noidle)
acpi_desc->fwa_cap = NVDIMM_FWA_CAP_INVALID;
acpi_desc->fwa_noidle = val;
return size;
}
DEVICE_ATTR_RW(firmware_activate_noidle);
bool intel_fwa_supported(struct nvdimm_bus *nvdimm_bus)
{
struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
unsigned long *mask;
if (!test_bit(NVDIMM_BUS_FAMILY_INTEL, &nd_desc->bus_family_mask))
return false;
mask = &acpi_desc->family_dsm_mask[NVDIMM_BUS_FAMILY_INTEL];
return *mask == NVDIMM_BUS_INTEL_FW_ACTIVATE_CMDMASK;
}
static unsigned long intel_security_flags(struct nvdimm *nvdimm,
enum nvdimm_passphrase_type ptype)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
unsigned long security_flags = 0;
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_get_security_state cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_GET_SECURITY_STATE,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_out =
sizeof(struct nd_intel_get_security_state),
.nd_fw_size =
sizeof(struct nd_intel_get_security_state),
},
};
int rc;
if (!test_bit(NVDIMM_INTEL_GET_SECURITY_STATE, &nfit_mem->dsm_mask))
return 0;
/*
* Short circuit the state retrieval while we are doing overwrite.
* The DSM spec states that the security state is indeterminate
* until the overwrite DSM completes.
*/
if (nvdimm_in_overwrite(nvdimm) && ptype == NVDIMM_USER)
return BIT(NVDIMM_SECURITY_OVERWRITE);
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
if (rc < 0 || nd_cmd.cmd.status) {
pr_err("%s: security state retrieval failed (%d:%#x)\n",
nvdimm_name(nvdimm), rc, nd_cmd.cmd.status);
return 0;
}
/* check and see if security is enabled and locked */
if (ptype == NVDIMM_MASTER) {
if (nd_cmd.cmd.extended_state & ND_INTEL_SEC_ESTATE_ENABLED)
set_bit(NVDIMM_SECURITY_UNLOCKED, &security_flags);
else
set_bit(NVDIMM_SECURITY_DISABLED, &security_flags);
if (nd_cmd.cmd.extended_state & ND_INTEL_SEC_ESTATE_PLIMIT)
set_bit(NVDIMM_SECURITY_FROZEN, &security_flags);
return security_flags;
}
if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_UNSUPPORTED)
return 0;
if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_ENABLED) {
if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_FROZEN ||
nd_cmd.cmd.state & ND_INTEL_SEC_STATE_PLIMIT)
set_bit(NVDIMM_SECURITY_FROZEN, &security_flags);
if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_LOCKED)
set_bit(NVDIMM_SECURITY_LOCKED, &security_flags);
else
set_bit(NVDIMM_SECURITY_UNLOCKED, &security_flags);
} else
set_bit(NVDIMM_SECURITY_DISABLED, &security_flags);
return security_flags;
}
static int intel_security_freeze(struct nvdimm *nvdimm)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_freeze_lock cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_FREEZE_LOCK,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
},
};
int rc;
if (!test_bit(NVDIMM_INTEL_FREEZE_LOCK, &nfit_mem->dsm_mask))
return -ENOTTY;
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
if (rc < 0)
return rc;
if (nd_cmd.cmd.status)
return -EIO;
return 0;
}
static int intel_security_change_key(struct nvdimm *nvdimm,
const struct nvdimm_key_data *old_data,
const struct nvdimm_key_data *new_data,
enum nvdimm_passphrase_type ptype)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
unsigned int cmd = ptype == NVDIMM_MASTER ?
NVDIMM_INTEL_SET_MASTER_PASSPHRASE :
NVDIMM_INTEL_SET_PASSPHRASE;
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_set_passphrase cmd;
} nd_cmd = {
.pkg = {
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE * 2,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
.nd_command = cmd,
},
};
int rc;
if (!test_bit(cmd, &nfit_mem->dsm_mask))
return -ENOTTY;
memcpy(nd_cmd.cmd.old_pass, old_data->data,
sizeof(nd_cmd.cmd.old_pass));
memcpy(nd_cmd.cmd.new_pass, new_data->data,
sizeof(nd_cmd.cmd.new_pass));
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
if (rc < 0)
return rc;
switch (nd_cmd.cmd.status) {
case 0:
return 0;
case ND_INTEL_STATUS_INVALID_PASS:
return -EINVAL;
case ND_INTEL_STATUS_NOT_SUPPORTED:
return -EOPNOTSUPP;
case ND_INTEL_STATUS_INVALID_STATE:
default:
return -EIO;
}
}
static int __maybe_unused intel_security_unlock(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_unlock_unit cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_UNLOCK_UNIT,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
},
};
int rc;
if (!test_bit(NVDIMM_INTEL_UNLOCK_UNIT, &nfit_mem->dsm_mask))
return -ENOTTY;
memcpy(nd_cmd.cmd.passphrase, key_data->data,
sizeof(nd_cmd.cmd.passphrase));
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
if (rc < 0)
return rc;
switch (nd_cmd.cmd.status) {
case 0:
break;
case ND_INTEL_STATUS_INVALID_PASS:
return -EINVAL;
default:
return -EIO;
}
return 0;
}
static int intel_security_disable(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data)
{
int rc;
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_disable_passphrase cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_DISABLE_PASSPHRASE,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
},
};
if (!test_bit(NVDIMM_INTEL_DISABLE_PASSPHRASE, &nfit_mem->dsm_mask))
return -ENOTTY;
memcpy(nd_cmd.cmd.passphrase, key_data->data,
sizeof(nd_cmd.cmd.passphrase));
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
if (rc < 0)
return rc;
switch (nd_cmd.cmd.status) {
case 0:
break;
case ND_INTEL_STATUS_INVALID_PASS:
return -EINVAL;
case ND_INTEL_STATUS_INVALID_STATE:
default:
return -ENXIO;
}
return 0;
}
static int __maybe_unused intel_security_erase(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key,
enum nvdimm_passphrase_type ptype)
{
int rc;
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
unsigned int cmd = ptype == NVDIMM_MASTER ?
NVDIMM_INTEL_MASTER_SECURE_ERASE : NVDIMM_INTEL_SECURE_ERASE;
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_secure_erase cmd;
} nd_cmd = {
.pkg = {
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
.nd_command = cmd,
},
};
if (!test_bit(cmd, &nfit_mem->dsm_mask))
return -ENOTTY;
memcpy(nd_cmd.cmd.passphrase, key->data,
sizeof(nd_cmd.cmd.passphrase));
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
if (rc < 0)
return rc;
switch (nd_cmd.cmd.status) {
case 0:
break;
case ND_INTEL_STATUS_NOT_SUPPORTED:
return -EOPNOTSUPP;
case ND_INTEL_STATUS_INVALID_PASS:
return -EINVAL;
case ND_INTEL_STATUS_INVALID_STATE:
default:
return -ENXIO;
}
return 0;
}
static int __maybe_unused intel_security_query_overwrite(struct nvdimm *nvdimm)
{
int rc;
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_query_overwrite cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_QUERY_OVERWRITE,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
},
};
if (!test_bit(NVDIMM_INTEL_QUERY_OVERWRITE, &nfit_mem->dsm_mask))
return -ENOTTY;
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
if (rc < 0)
return rc;
switch (nd_cmd.cmd.status) {
case 0:
break;
case ND_INTEL_STATUS_OQUERY_INPROGRESS:
return -EBUSY;
default:
return -ENXIO;
}
return 0;
}
static int __maybe_unused intel_security_overwrite(struct nvdimm *nvdimm,
const struct nvdimm_key_data *nkey)
{
int rc;
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_overwrite cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_OVERWRITE,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
.nd_size_out = ND_INTEL_STATUS_SIZE,
.nd_fw_size = ND_INTEL_STATUS_SIZE,
},
};
if (!test_bit(NVDIMM_INTEL_OVERWRITE, &nfit_mem->dsm_mask))
return -ENOTTY;
memcpy(nd_cmd.cmd.passphrase, nkey->data,
sizeof(nd_cmd.cmd.passphrase));
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
if (rc < 0)
return rc;
switch (nd_cmd.cmd.status) {
case 0:
return 0;
case ND_INTEL_STATUS_OVERWRITE_UNSUPPORTED:
return -ENOTSUPP;
case ND_INTEL_STATUS_INVALID_PASS:
return -EINVAL;
case ND_INTEL_STATUS_INVALID_STATE:
default:
return -ENXIO;
}
}
static const struct nvdimm_security_ops __intel_security_ops = {
.get_flags = intel_security_flags,
.freeze = intel_security_freeze,
.change_key = intel_security_change_key,
.disable = intel_security_disable,
#ifdef CONFIG_X86
.unlock = intel_security_unlock,
.erase = intel_security_erase,
.overwrite = intel_security_overwrite,
.query_overwrite = intel_security_query_overwrite,
#endif
};
const struct nvdimm_security_ops *intel_security_ops = &__intel_security_ops;
static int intel_bus_fwa_businfo(struct nvdimm_bus_descriptor *nd_desc,
struct nd_intel_bus_fw_activate_businfo *info)
{
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_bus_fw_activate_businfo cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_BUS_INTEL_FW_ACTIVATE_BUSINFO,
.nd_family = NVDIMM_BUS_FAMILY_INTEL,
.nd_size_out =
sizeof(struct nd_intel_bus_fw_activate_businfo),
.nd_fw_size =
sizeof(struct nd_intel_bus_fw_activate_businfo),
},
};
int rc;
rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd),
NULL);
*info = nd_cmd.cmd;
return rc;
}
/* The fw_ops expect to be called with the nvdimm_bus_lock() held */
static enum nvdimm_fwa_state intel_bus_fwa_state(
struct nvdimm_bus_descriptor *nd_desc)
{
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
struct nd_intel_bus_fw_activate_businfo info;
struct device *dev = acpi_desc->dev;
enum nvdimm_fwa_state state;
int rc;
/*
* It should not be possible for platform firmware to return
* busy because activate is a synchronous operation. Treat it
* similar to invalid, i.e. always refresh / poll the status.
*/
switch (acpi_desc->fwa_state) {
case NVDIMM_FWA_INVALID:
case NVDIMM_FWA_BUSY:
break;
default:
/* check if capability needs to be refreshed */
if (acpi_desc->fwa_cap == NVDIMM_FWA_CAP_INVALID)
break;
return acpi_desc->fwa_state;
}
/* Refresh with platform firmware */
rc = intel_bus_fwa_businfo(nd_desc, &info);
if (rc)
return NVDIMM_FWA_INVALID;
switch (info.state) {
case ND_INTEL_FWA_IDLE:
state = NVDIMM_FWA_IDLE;
break;
case ND_INTEL_FWA_BUSY:
state = NVDIMM_FWA_BUSY;
break;
case ND_INTEL_FWA_ARMED:
if (info.activate_tmo > info.max_quiesce_tmo)
state = NVDIMM_FWA_ARM_OVERFLOW;
else
state = NVDIMM_FWA_ARMED;
break;
default:
dev_err_once(dev, "invalid firmware activate state %d\n",
info.state);
return NVDIMM_FWA_INVALID;
}
/*
* Capability data is available in the same payload as state. It
* is expected to be static.
*/
if (acpi_desc->fwa_cap == NVDIMM_FWA_CAP_INVALID) {
if (info.capability & ND_INTEL_BUS_FWA_CAP_FWQUIESCE)
acpi_desc->fwa_cap = NVDIMM_FWA_CAP_QUIESCE;
else if (info.capability & ND_INTEL_BUS_FWA_CAP_OSQUIESCE) {
/*
* Skip hibernate cycle by default if platform
* indicates that it does not need devices to be
* quiesced.
*/
acpi_desc->fwa_cap = NVDIMM_FWA_CAP_LIVE;
} else
acpi_desc->fwa_cap = NVDIMM_FWA_CAP_NONE;
}
acpi_desc->fwa_state = state;
return state;
}
static enum nvdimm_fwa_capability intel_bus_fwa_capability(
struct nvdimm_bus_descriptor *nd_desc)
{
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
if (acpi_desc->fwa_cap > NVDIMM_FWA_CAP_INVALID)
return acpi_desc->fwa_cap;
if (intel_bus_fwa_state(nd_desc) > NVDIMM_FWA_INVALID)
return acpi_desc->fwa_cap;
return NVDIMM_FWA_CAP_INVALID;
}
static int intel_bus_fwa_activate(struct nvdimm_bus_descriptor *nd_desc)
{
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_bus_fw_activate cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_BUS_INTEL_FW_ACTIVATE,
.nd_family = NVDIMM_BUS_FAMILY_INTEL,
.nd_size_in = sizeof(nd_cmd.cmd.iodev_state),
.nd_size_out =
sizeof(struct nd_intel_bus_fw_activate),
.nd_fw_size =
sizeof(struct nd_intel_bus_fw_activate),
},
/*
* Even though activate is run from a suspended context,
* for safety, still ask platform firmware to force
* quiesce devices by default. Let a module
* parameter override that policy.
*/
.cmd = {
.iodev_state = acpi_desc->fwa_noidle
? ND_INTEL_BUS_FWA_IODEV_OS_IDLE
: ND_INTEL_BUS_FWA_IODEV_FORCE_IDLE,
},
};
int rc;
switch (intel_bus_fwa_state(nd_desc)) {
case NVDIMM_FWA_ARMED:
case NVDIMM_FWA_ARM_OVERFLOW:
break;
default:
return -ENXIO;
}
rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd),
NULL);
/*
* Whether the command succeeded, or failed, the agent checking
* for the result needs to query the DIMMs individually.
* Increment the activation count to invalidate all the DIMM
* states at once (it's otherwise not possible to take
* acpi_desc->init_mutex in this context)
*/
acpi_desc->fwa_state = NVDIMM_FWA_INVALID;
acpi_desc->fwa_count++;
dev_dbg(acpi_desc->dev, "result: %d\n", rc);
return rc;
}
static const struct nvdimm_bus_fw_ops __intel_bus_fw_ops = {
.activate_state = intel_bus_fwa_state,
.capability = intel_bus_fwa_capability,
.activate = intel_bus_fwa_activate,
};
const struct nvdimm_bus_fw_ops *intel_bus_fw_ops = &__intel_bus_fw_ops;
static int intel_fwa_dimminfo(struct nvdimm *nvdimm,
struct nd_intel_fw_activate_dimminfo *info)
{
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_fw_activate_dimminfo cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_FW_ACTIVATE_DIMMINFO,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_out =
sizeof(struct nd_intel_fw_activate_dimminfo),
.nd_fw_size =
sizeof(struct nd_intel_fw_activate_dimminfo),
},
};
int rc;
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
*info = nd_cmd.cmd;
return rc;
}
static enum nvdimm_fwa_state intel_fwa_state(struct nvdimm *nvdimm)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct acpi_nfit_desc *acpi_desc = nfit_mem->acpi_desc;
struct nd_intel_fw_activate_dimminfo info;
int rc;
/*
* Similar to the bus state, since activate is synchronous the
* busy state should resolve within the context of 'activate'.
*/
switch (nfit_mem->fwa_state) {
case NVDIMM_FWA_INVALID:
case NVDIMM_FWA_BUSY:
break;
default:
/* If no activations occurred the old state is still valid */
if (nfit_mem->fwa_count == acpi_desc->fwa_count)
return nfit_mem->fwa_state;
}
rc = intel_fwa_dimminfo(nvdimm, &info);
if (rc)
return NVDIMM_FWA_INVALID;
switch (info.state) {
case ND_INTEL_FWA_IDLE:
nfit_mem->fwa_state = NVDIMM_FWA_IDLE;
break;
case ND_INTEL_FWA_BUSY:
nfit_mem->fwa_state = NVDIMM_FWA_BUSY;
break;
case ND_INTEL_FWA_ARMED:
nfit_mem->fwa_state = NVDIMM_FWA_ARMED;
break;
default:
nfit_mem->fwa_state = NVDIMM_FWA_INVALID;
break;
}
switch (info.result) {
case ND_INTEL_DIMM_FWA_NONE:
nfit_mem->fwa_result = NVDIMM_FWA_RESULT_NONE;
break;
case ND_INTEL_DIMM_FWA_SUCCESS:
nfit_mem->fwa_result = NVDIMM_FWA_RESULT_SUCCESS;
break;
case ND_INTEL_DIMM_FWA_NOTSTAGED:
nfit_mem->fwa_result = NVDIMM_FWA_RESULT_NOTSTAGED;
break;
case ND_INTEL_DIMM_FWA_NEEDRESET:
nfit_mem->fwa_result = NVDIMM_FWA_RESULT_NEEDRESET;
break;
case ND_INTEL_DIMM_FWA_MEDIAFAILED:
case ND_INTEL_DIMM_FWA_ABORT:
case ND_INTEL_DIMM_FWA_NOTSUPP:
case ND_INTEL_DIMM_FWA_ERROR:
default:
nfit_mem->fwa_result = NVDIMM_FWA_RESULT_FAIL;
break;
}
nfit_mem->fwa_count = acpi_desc->fwa_count;
return nfit_mem->fwa_state;
}
static enum nvdimm_fwa_result intel_fwa_result(struct nvdimm *nvdimm)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct acpi_nfit_desc *acpi_desc = nfit_mem->acpi_desc;
if (nfit_mem->fwa_count == acpi_desc->fwa_count
&& nfit_mem->fwa_result > NVDIMM_FWA_RESULT_INVALID)
return nfit_mem->fwa_result;
if (intel_fwa_state(nvdimm) > NVDIMM_FWA_INVALID)
return nfit_mem->fwa_result;
return NVDIMM_FWA_RESULT_INVALID;
}
static int intel_fwa_arm(struct nvdimm *nvdimm, enum nvdimm_fwa_trigger arm)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct acpi_nfit_desc *acpi_desc = nfit_mem->acpi_desc;
struct {
struct nd_cmd_pkg pkg;
struct nd_intel_fw_activate_arm cmd;
} nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_FW_ACTIVATE_ARM,
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = sizeof(nd_cmd.cmd.activate_arm),
.nd_size_out =
sizeof(struct nd_intel_fw_activate_arm),
.nd_fw_size =
sizeof(struct nd_intel_fw_activate_arm),
},
.cmd = {
.activate_arm = arm == NVDIMM_FWA_ARM
? ND_INTEL_DIMM_FWA_ARM
: ND_INTEL_DIMM_FWA_DISARM,
},
};
int rc;
switch (intel_fwa_state(nvdimm)) {
case NVDIMM_FWA_INVALID:
return -ENXIO;
case NVDIMM_FWA_BUSY:
return -EBUSY;
case NVDIMM_FWA_IDLE:
if (arm == NVDIMM_FWA_DISARM)
return 0;
break;
case NVDIMM_FWA_ARMED:
if (arm == NVDIMM_FWA_ARM)
return 0;
break;
default:
return -ENXIO;
}
/*
* Invalidate the bus-level state, now that we're committed to
* changing the 'arm' state.
*/
acpi_desc->fwa_state = NVDIMM_FWA_INVALID;
nfit_mem->fwa_state = NVDIMM_FWA_INVALID;
rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL);
dev_dbg(acpi_desc->dev, "%s result: %d\n", arm == NVDIMM_FWA_ARM
? "arm" : "disarm", rc);
return rc;
}
static const struct nvdimm_fw_ops __intel_fw_ops = {
.activate_state = intel_fwa_state,
.activate_result = intel_fwa_result,
.arm = intel_fwa_arm,
};
const struct nvdimm_fw_ops *intel_fw_ops = &__intel_fw_ops;