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firmware: arm_scmi: Port voltage protocol to new protocols interface 

Convert internals of protocol implementation to use protocol handles and
expose a new protocol operations interface for SCMI driver using the new
get/put common operations, while keeping the old handle->voltage_ops still
around to ease transition.

Remove handle->voltage_priv now unused.

Link: https://lore.kernel.org/r/20210316124903.35011-29-cristian.marussi@arm.com
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Cristian Marussi 2021-03-16 12:48:53 +00:00 committed by Sudeep Holla
parent b46d852718
commit fe4894d968
2 changed files with 137 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

181
drivers/firmware/arm_scmi/voltage.c
View File

@ -59,23 +59,23 @@ struct voltage_info {
struct scmi_voltage_info *domains;
};
static int scmi_protocol_attributes_get(const struct scmi_handle *handle,
static int scmi_protocol_attributes_get(const struct scmi_protocol_handle *ph,
struct voltage_info *vinfo)
{
int ret;
struct scmi_xfer *t;
ret = scmi_xfer_get_init(handle, PROTOCOL_ATTRIBUTES,
SCMI_PROTOCOL_VOLTAGE, 0, sizeof(__le32), &t);
ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0,
sizeof(__le32), &t);
if (ret)
return ret;
ret = scmi_do_xfer(handle, t);
ret = ph->xops->do_xfer(ph, t);
if (!ret)
vinfo->num_domains =
NUM_VOLTAGE_DOMAINS(get_unaligned_le32(t->rx.buf));
scmi_xfer_put(handle, t);
ph->xops->xfer_put(ph, t);
return ret;
}
@ -109,24 +109,23 @@ static int scmi_init_voltage_levels(struct device *dev,
return 0;
}
static int scmi_voltage_descriptors_get(const struct scmi_handle *handle,
static int scmi_voltage_descriptors_get(const struct scmi_protocol_handle *ph,
struct voltage_info *vinfo)
{
int ret, dom;
struct scmi_xfer *td, *tl;
struct device *dev = handle->dev;
struct device *dev = ph->dev;
struct scmi_msg_resp_domain_attributes *resp_dom;
struct scmi_msg_resp_describe_levels *resp_levels;
ret = scmi_xfer_get_init(handle, VOLTAGE_DOMAIN_ATTRIBUTES,
SCMI_PROTOCOL_VOLTAGE, sizeof(__le32),
sizeof(*resp_dom), &td);
ret = ph->xops->xfer_get_init(ph, VOLTAGE_DOMAIN_ATTRIBUTES,
sizeof(__le32), sizeof(*resp_dom), &td);
if (ret)
return ret;
resp_dom = td->rx.buf;
ret = scmi_xfer_get_init(handle, VOLTAGE_DESCRIBE_LEVELS,
SCMI_PROTOCOL_VOLTAGE, sizeof(__le64), 0, &tl);
ret = ph->xops->xfer_get_init(ph, VOLTAGE_DESCRIBE_LEVELS,
sizeof(__le64), 0, &tl);
if (ret)
goto outd;
resp_levels = tl->rx.buf;
@ -139,7 +138,7 @@ static int scmi_voltage_descriptors_get(const struct scmi_handle *handle,
/* Retrieve domain attributes at first ... */
put_unaligned_le32(dom, td->tx.buf);
ret = scmi_do_xfer(handle, td);
ret = ph->xops->do_xfer(ph, td);
/* Skip domain on comms error */
if (ret)
continue;
@ -157,7 +156,7 @@ static int scmi_voltage_descriptors_get(const struct scmi_handle *handle,
cmd->domain_id = cpu_to_le32(v->id);
cmd->level_index = desc_index;
ret = scmi_do_xfer(handle, tl);
ret = ph->xops->do_xfer(ph, tl);
if (ret)
break;
@ -176,7 +175,7 @@ static int scmi_voltage_descriptors_get(const struct scmi_handle *handle,
}
if (desc_index + num_returned > v->num_levels) {
dev_err(handle->dev,
dev_err(ph->dev,
"No. of voltage levels can't exceed %d\n",
v->num_levels);
ret = -EINVAL;
@ -195,7 +194,7 @@ static int scmi_voltage_descriptors_get(const struct scmi_handle *handle,
desc_index += num_returned;
scmi_reset_rx_to_maxsz(handle, tl);
ph->xops->reset_rx_to_maxsz(ph, tl);
/* check both to avoid infinite loop due to buggy fw */
} while (num_returned && num_remaining);
@ -204,55 +203,52 @@ static int scmi_voltage_descriptors_get(const struct scmi_handle *handle,
devm_kfree(dev, v->levels_uv);
}
scmi_reset_rx_to_maxsz(handle, td);
ph->xops->reset_rx_to_maxsz(ph, td);
}
scmi_xfer_put(handle, tl);
ph->xops->xfer_put(ph, tl);
outd:
scmi_xfer_put(handle, td);
ph->xops->xfer_put(ph, td);
return ret;
}
static int __scmi_voltage_get_u32(const struct scmi_handle *handle,
static int __scmi_voltage_get_u32(const struct scmi_protocol_handle *ph,
u8 cmd_id, u32 domain_id, u32 *value)
{
int ret;
struct scmi_xfer *t;
struct voltage_info *vinfo = handle->voltage_priv;
struct voltage_info *vinfo = ph->get_priv(ph);
if (domain_id >= vinfo->num_domains)
return -EINVAL;
ret = scmi_xfer_get_init(handle, cmd_id,
SCMI_PROTOCOL_VOLTAGE,
sizeof(__le32), 0, &t);
ret = ph->xops->xfer_get_init(ph, cmd_id, sizeof(__le32), 0, &t);
if (ret)
return ret;
put_unaligned_le32(domain_id, t->tx.buf);
ret = scmi_do_xfer(handle, t);
ret = ph->xops->do_xfer(ph, t);
if (!ret)
*value = get_unaligned_le32(t->rx.buf);
scmi_xfer_put(handle, t);
ph->xops->xfer_put(ph, t);
return ret;
}
static int scmi_voltage_config_set(const struct scmi_handle *handle,
static int scmi_voltage_config_set(const struct scmi_protocol_handle *ph,
u32 domain_id, u32 config)
{
int ret;
struct scmi_xfer *t;
struct voltage_info *vinfo = handle->voltage_priv;
struct voltage_info *vinfo = ph->get_priv(ph);
struct scmi_msg_cmd_config_set *cmd;
if (domain_id >= vinfo->num_domains)
return -EINVAL;
ret = scmi_xfer_get_init(handle, VOLTAGE_CONFIG_SET,
SCMI_PROTOCOL_VOLTAGE,
sizeof(*cmd), 0, &t);
ret = ph->xops->xfer_get_init(ph, VOLTAGE_CONFIG_SET,
sizeof(*cmd), 0, &t);
if (ret)
return ret;
@ -260,33 +256,50 @@ static int scmi_voltage_config_set(const struct scmi_handle *handle,
cmd->domain_id = cpu_to_le32(domain_id);
cmd->config = cpu_to_le32(config & GENMASK(3, 0));
ret = scmi_do_xfer(handle, t);
ret = ph->xops->do_xfer(ph, t);
scmi_xfer_put(handle, t);
ph->xops->xfer_put(ph, t);
return ret;
}
static int scmi_voltage_config_get(const struct scmi_handle *handle,
static int __scmi_voltage_config_set(const struct scmi_handle *handle,
u32 domain_id, u32 config)
{
const struct scmi_protocol_handle *ph =
scmi_map_protocol_handle(handle, SCMI_PROTOCOL_VOLTAGE);
return scmi_voltage_config_set(ph, domain_id, config);
}
static int scmi_voltage_config_get(const struct scmi_protocol_handle *ph,
u32 domain_id, u32 *config)
{
return __scmi_voltage_get_u32(handle, VOLTAGE_CONFIG_GET,
return __scmi_voltage_get_u32(ph, VOLTAGE_CONFIG_GET,
domain_id, config);
}
static int scmi_voltage_level_set(const struct scmi_handle *handle,
static int __scmi_voltage_config_get(const struct scmi_handle *handle,
u32 domain_id, u32 *config)
{
const struct scmi_protocol_handle *ph =
scmi_map_protocol_handle(handle, SCMI_PROTOCOL_VOLTAGE);
return scmi_voltage_config_get(ph, domain_id, config);
}
static int scmi_voltage_level_set(const struct scmi_protocol_handle *ph,
u32 domain_id, u32 flags, s32 volt_uV)
{
int ret;
struct scmi_xfer *t;
struct voltage_info *vinfo = handle->voltage_priv;
struct voltage_info *vinfo = ph->get_priv(ph);
struct scmi_msg_cmd_level_set *cmd;
if (domain_id >= vinfo->num_domains)
return -EINVAL;
ret = scmi_xfer_get_init(handle, VOLTAGE_LEVEL_SET,
SCMI_PROTOCOL_VOLTAGE,
sizeof(*cmd), 0, &t);
ret = ph->xops->xfer_get_init(ph, VOLTAGE_LEVEL_SET,
sizeof(*cmd), 0, &t);
if (ret)
return ret;
@ -295,23 +308,41 @@ static int scmi_voltage_level_set(const struct scmi_handle *handle,
cmd->flags = cpu_to_le32(flags);
cmd->voltage_level = cpu_to_le32(volt_uV);
ret = scmi_do_xfer(handle, t);
ret = ph->xops->do_xfer(ph, t);
scmi_xfer_put(handle, t);
ph->xops->xfer_put(ph, t);
return ret;
}
static int scmi_voltage_level_get(const struct scmi_handle *handle,
static int __scmi_voltage_level_set(const struct scmi_handle *handle,
u32 domain_id, u32 flags, s32 volt_uV)
{
const struct scmi_protocol_handle *ph =
scmi_map_protocol_handle(handle, SCMI_PROTOCOL_VOLTAGE);
return scmi_voltage_level_set(ph, domain_id, flags, volt_uV);
}
static int scmi_voltage_level_get(const struct scmi_protocol_handle *ph,
u32 domain_id, s32 *volt_uV)
{
return __scmi_voltage_get_u32(handle, VOLTAGE_LEVEL_GET,
return __scmi_voltage_get_u32(ph, VOLTAGE_LEVEL_GET,
domain_id, (u32 *)volt_uV);
}
static const struct scmi_voltage_info * __must_check
scmi_voltage_info_get(const struct scmi_handle *handle, u32 domain_id)
static int __scmi_voltage_level_get(const struct scmi_handle *handle,
u32 domain_id, s32 *volt_uV)
{
struct voltage_info *vinfo = handle->voltage_priv;
const struct scmi_protocol_handle *ph =
scmi_map_protocol_handle(handle, SCMI_PROTOCOL_VOLTAGE);
return scmi_voltage_level_get(ph, domain_id, volt_uV);
}
static const struct scmi_voltage_info * __must_check
scmi_voltage_info_get(const struct scmi_protocol_handle *ph, u32 domain_id)
{
struct voltage_info *vinfo = ph->get_priv(ph);
if (domain_id >= vinfo->num_domains ||
!vinfo->domains[domain_id].num_levels)
@ -320,14 +351,40 @@ scmi_voltage_info_get(const struct scmi_handle *handle, u32 domain_id)
return vinfo->domains + domain_id;
}
static int scmi_voltage_domains_num_get(const struct scmi_handle *handle)
static const struct scmi_voltage_info * __must_check
__scmi_voltage_info_get(const struct scmi_handle *handle, u32 domain_id)
{
struct voltage_info *vinfo = handle->voltage_priv;
const struct scmi_protocol_handle *ph =
scmi_map_protocol_handle(handle, SCMI_PROTOCOL_VOLTAGE);
return scmi_voltage_info_get(ph, domain_id);
}
static int scmi_voltage_domains_num_get(const struct scmi_protocol_handle *ph)
{
struct voltage_info *vinfo = ph->get_priv(ph);
return vinfo->num_domains;
}
static int __scmi_voltage_domains_num_get(const struct scmi_handle *handle)
{
const struct scmi_protocol_handle *ph =
scmi_map_protocol_handle(handle, SCMI_PROTOCOL_VOLTAGE);
return scmi_voltage_domains_num_get(ph);
}
static struct scmi_voltage_ops voltage_ops = {
.num_domains_get = __scmi_voltage_domains_num_get,
.info_get = __scmi_voltage_info_get,
.config_set = __scmi_voltage_config_set,
.config_get = __scmi_voltage_config_get,
.level_set = __scmi_voltage_level_set,
.level_get = __scmi_voltage_level_get,
};
static struct scmi_voltage_proto_ops voltage_proto_ops = {
.num_domains_get = scmi_voltage_domains_num_get,
.info_get = scmi_voltage_info_get,
.config_set = scmi_voltage_config_set,
@ -336,51 +393,53 @@ static struct scmi_voltage_ops voltage_ops = {
.level_get = scmi_voltage_level_get,
};
static int scmi_voltage_protocol_init(struct scmi_handle *handle)
static int scmi_voltage_protocol_init(const struct scmi_protocol_handle *ph)
{
int ret;
u32 version;
struct voltage_info *vinfo;
struct scmi_handle *handle;
ret = scmi_version_get(handle, SCMI_PROTOCOL_VOLTAGE, &version);
ret = ph->xops->version_get(ph, &version);
if (ret)
return ret;
dev_dbg(handle->dev, "Voltage Version %d.%d\n",
dev_dbg(ph->dev, "Voltage Version %d.%d\n",
PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version));
vinfo = devm_kzalloc(handle->dev, sizeof(*vinfo), GFP_KERNEL);
vinfo = devm_kzalloc(ph->dev, sizeof(*vinfo), GFP_KERNEL);
if (!vinfo)
return -ENOMEM;
vinfo->version = version;
ret = scmi_protocol_attributes_get(handle, vinfo);
ret = scmi_protocol_attributes_get(ph, vinfo);
if (ret)
return ret;
if (vinfo->num_domains) {
vinfo->domains = devm_kcalloc(handle->dev, vinfo->num_domains,
vinfo->domains = devm_kcalloc(ph->dev, vinfo->num_domains,
sizeof(*vinfo->domains),
GFP_KERNEL);
if (!vinfo->domains)
return -ENOMEM;
ret = scmi_voltage_descriptors_get(handle, vinfo);
ret = scmi_voltage_descriptors_get(ph, vinfo);
if (ret)
return ret;
} else {
dev_warn(handle->dev, "No Voltage domains found.\n");
dev_warn(ph->dev, "No Voltage domains found.\n");
}
/* Transient code for legacy ops interface */
handle = scmi_map_scmi_handle(ph);
handle->voltage_ops = &voltage_ops;
handle->voltage_priv = vinfo;
return 0;
return ph->set_priv(ph, vinfo);
}
static const struct scmi_protocol scmi_voltage = {
.id = SCMI_PROTOCOL_VOLTAGE,
.init = &scmi_voltage_protocol_init,
.ops = &voltage_ops,
.instance_init = &scmi_voltage_protocol_init,
.ops = &voltage_proto_ops,
};
DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(voltage, scmi_voltage)

24
include/linux/scmi_protocol.h
View File

@ -515,7 +515,7 @@ struct scmi_voltage_info {
};
/**
* struct scmi_voltage_ops - represents the various operations provided
* struct scmi_voltage_proto_ops - represents the various operations provided
* by SCMI Voltage Protocol
*
* @num_domains_get: get the count of voltage domains provided by SCMI
@ -525,14 +525,28 @@ struct scmi_voltage_info {
* @level_set: set the voltage level for the specified domain
* @level_get: get the voltage level of the specified domain
*/
struct scmi_voltage_proto_ops {
int (*num_domains_get)(const struct scmi_protocol_handle *ph);
const struct scmi_voltage_info __must_check *(*info_get)
(const struct scmi_protocol_handle *ph, u32 domain_id);
int (*config_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
u32 config);
#define SCMI_VOLTAGE_ARCH_STATE_OFF 0x0
#define SCMI_VOLTAGE_ARCH_STATE_ON 0x7
int (*config_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
u32 *config);
int (*level_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
u32 flags, s32 volt_uV);
int (*level_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
s32 *volt_uV);
};
struct scmi_voltage_ops {
int (*num_domains_get)(const struct scmi_handle *handle);
const struct scmi_voltage_info __must_check *(*info_get)
(const struct scmi_handle *handle, u32 domain_id);
int (*config_set)(const struct scmi_handle *handle, u32 domain_id,
u32 config);
#define SCMI_VOLTAGE_ARCH_STATE_OFF 0x0
#define SCMI_VOLTAGE_ARCH_STATE_ON 0x7
int (*config_get)(const struct scmi_handle *handle, u32 domain_id,
u32 *config);
int (*level_set)(const struct scmi_handle *handle, u32 domain_id,
@ -610,8 +624,6 @@ struct scmi_notify_ops {
* operations and a dedicated protocol handler
* @devm_protocol_put: devres managed method to release a protocol
* @notify_ops: pointer to set of notifications related operations
* @voltage_priv: pointer to private data structure specific to voltage
* protocol(for internal use only)
* @notify_priv: pointer to private data structure specific to notifications
* (for internal use only)
*/
@ -626,8 +638,6 @@ struct scmi_handle {
void (*devm_protocol_put)(struct scmi_device *sdev, u8 proto);
const struct scmi_notify_ops *notify_ops;
/* for protocol internal use */
void *voltage_priv;
void *notify_priv;
};