From: Cristian Marussi <cristian.marussi@arm.com>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: sudeep.holla@arm.com, lukasz.luba@arm.com,
james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com,
f.fainelli@gmail.com, etienne.carriere@linaro.org,
thara.gopinath@linaro.org, vincent.guittot@linaro.org,
souvik.chakravarty@arm.com, cristian.marussi@arm.com
Subject: [PATCH 02/11] firmware: arm_scmi: hide protocols' private data
Date: Wed, 14 Oct 2020 16:05:36 +0100 [thread overview]
Message-ID: <20201014150545.44807-3-cristian.marussi@arm.com> (raw)
In-Reply-To: <20201014150545.44807-1-cristian.marussi@arm.com>
Protocols private data were meant to be used exclusively by protocol code
but they are currently exposed through the handle, so available also to
SCMI drivers: move them away from handle into instance specific data and
provide internal helpers to let protocols implementation set/get their own
private data from protocol code.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
drivers/firmware/arm_scmi/clock.c | 12 +++++-----
drivers/firmware/arm_scmi/common.h | 4 ++++
drivers/firmware/arm_scmi/driver.c | 32 +++++++++++++++++++++++++++
drivers/firmware/arm_scmi/perf.c | 34 ++++++++++++++++++-----------
drivers/firmware/arm_scmi/power.c | 10 ++++-----
drivers/firmware/arm_scmi/reset.c | 16 ++++++++------
drivers/firmware/arm_scmi/sensors.c | 13 ++++++-----
drivers/firmware/arm_scmi/system.c | 4 +---
include/linux/scmi_protocol.h | 17 ---------------
9 files changed, 86 insertions(+), 56 deletions(-)
diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c
index 94bcad9a7d19..4e8dafc36d7e 100644
--- a/drivers/firmware/arm_scmi/clock.c
+++ b/drivers/firmware/arm_scmi/clock.c
@@ -240,7 +240,8 @@ static int scmi_clock_rate_set(const struct scmi_handle *handle, u32 clk_id,
u32 flags = 0;
struct scmi_xfer *t;
struct scmi_clock_set_rate *cfg;
- struct clock_info *ci = handle->clk_priv;
+ struct clock_info *ci =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_CLOCK);
ret = scmi_xfer_get_init(handle, CLOCK_RATE_SET, SCMI_PROTOCOL_CLOCK,
sizeof(*cfg), 0, &t);
@@ -303,7 +304,8 @@ static int scmi_clock_disable(const struct scmi_handle *handle, u32 clk_id)
static int scmi_clock_count_get(const struct scmi_handle *handle)
{
- struct clock_info *ci = handle->clk_priv;
+ struct clock_info *ci =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_CLOCK);
return ci->num_clocks;
}
@@ -311,7 +313,8 @@ static int scmi_clock_count_get(const struct scmi_handle *handle)
static const struct scmi_clock_info *
scmi_clock_info_get(const struct scmi_handle *handle, u32 clk_id)
{
- struct clock_info *ci = handle->clk_priv;
+ struct clock_info *ci =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_CLOCK);
struct scmi_clock_info *clk = ci->clk + clk_id;
if (!clk->name[0])
@@ -361,9 +364,8 @@ static int scmi_clock_protocol_init(struct scmi_handle *handle)
cinfo->version = version;
handle->clk_ops = &clk_ops;
- handle->clk_priv = cinfo;
- return 0;
+ return scmi_set_proto_priv(handle, SCMI_PROTOCOL_CLOCK, cinfo);
}
static struct scmi_protocol scmi_clock = {
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index b08a8ddbc22a..de2f22032a57 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -205,6 +205,10 @@ const struct scmi_protocol *scmi_get_protocol(int protocol_id);
int scmi_acquire_protocol(struct scmi_handle *handle, u8 protocol_id);
void scmi_release_protocol(struct scmi_handle *handle, u8 protocol_id);
+void *scmi_get_proto_priv(const struct scmi_handle *h, u8 prot);
+int scmi_set_proto_priv(const struct scmi_handle *handle, const u8 proto,
+ void *priv);
+
/* SCMI Transport */
/**
* struct scmi_chan_info - Structure representing a SCMI channel information
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 7de994e49884..bad1d0130e96 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -100,6 +100,10 @@ struct scmi_protocol_instance {
* this SCMI instance: populated on protocol's first attempted
* usage.
* @protocols_mtx: A mutex to protect protocols instances initialization.
+ * @protocols_private_data: An array of per-protocol per-instance private
+ * data: populated by protocol's initialization
+ * routines when @protocols is still not filled, so
+ * they have to sit on their own.
* @protocols_imp: List of protocols implemented, currently maximum of
* MAX_PROTOCOLS_IMP elements allocated by the base protocol
* @node: List head
@@ -117,6 +121,7 @@ struct scmi_info {
struct scmi_protocol_instance *protocols[SCMI_MAX_PROTO];
/* Ensure mutual exclusive access to protocols instance array */
struct mutex protocols_mtx;
+ void *protocols_private_data[SCMI_MAX_PROTO];
u8 *protocols_imp;
struct list_head node;
int users;
@@ -542,6 +547,32 @@ int scmi_version_get(const struct scmi_handle *handle, u8 protocol,
return ret;
}
+int scmi_set_proto_priv(const struct scmi_handle *handle,
+ u8 protocol_id, void *priv)
+{
+ struct scmi_info *info = handle_to_scmi_info(handle);
+
+ /* Ensure protocols_private_data has been updated */
+ smp_rmb();
+ if (WARN_ON(info->protocols_private_data[protocol_id]))
+ return -EINVAL;
+
+ info->protocols_private_data[protocol_id] = priv;
+ /* Ensure updated protocol private date are visible */
+ smp_wmb();
+
+ return 0;
+}
+
+void *scmi_get_proto_priv(const struct scmi_handle *handle, u8 protocol_id)
+{
+ struct scmi_info *info = handle_to_scmi_info(handle);
+
+ /* Ensure protocols_private_data has been updated */
+ smp_rmb();
+ return info->protocols_private_data[protocol_id];
+}
+
/**
* scmi_get_protocol_instance - Protocol initialization helper.
* @handle: A reference to the SCMI platform instance.
@@ -657,6 +688,7 @@ void scmi_release_protocol(struct scmi_handle *handle, u8 protocol_id)
if (pi->proto->deinit)
pi->proto->deinit(handle);
+ info->protocols_private_data[protocol_id] = NULL;
info->protocols[protocol_id] = NULL;
/* Ensure deinitialized protocol is visible */
smp_wmb();
diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index 854460a051c2..13e215f359fb 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -379,7 +379,8 @@ static int scmi_perf_mb_limits_set(const struct scmi_handle *handle, u32 domain,
static int scmi_perf_limits_set(const struct scmi_handle *handle, u32 domain,
u32 max_perf, u32 min_perf)
{
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi = scmi_get_proto_priv(handle,
+ SCMI_PROTOCOL_PERF);
struct perf_dom_info *dom = pi->dom_info + domain;
if (dom->fc_info && dom->fc_info->limit_set_addr) {
@@ -421,7 +422,8 @@ static int scmi_perf_mb_limits_get(const struct scmi_handle *handle, u32 domain,
static int scmi_perf_limits_get(const struct scmi_handle *handle, u32 domain,
u32 *max_perf, u32 *min_perf)
{
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
struct perf_dom_info *dom = pi->dom_info + domain;
if (dom->fc_info && dom->fc_info->limit_get_addr) {
@@ -459,7 +461,8 @@ static int scmi_perf_mb_level_set(const struct scmi_handle *handle, u32 domain,
static int scmi_perf_level_set(const struct scmi_handle *handle, u32 domain,
u32 level, bool poll)
{
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
struct perf_dom_info *dom = pi->dom_info + domain;
if (dom->fc_info && dom->fc_info->level_set_addr) {
@@ -496,7 +499,8 @@ static int scmi_perf_mb_level_get(const struct scmi_handle *handle, u32 domain,
static int scmi_perf_level_get(const struct scmi_handle *handle, u32 domain,
u32 *level, bool poll)
{
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
struct perf_dom_info *dom = pi->dom_info + domain;
if (dom->fc_info && dom->fc_info->level_get_addr) {
@@ -647,7 +651,8 @@ static int scmi_dvfs_device_opps_add(const struct scmi_handle *handle,
unsigned long freq;
struct scmi_opp *opp;
struct perf_dom_info *dom;
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
domain = scmi_dev_domain_id(dev);
if (domain < 0)
@@ -676,7 +681,8 @@ static int scmi_dvfs_transition_latency_get(const struct scmi_handle *handle,
struct device *dev)
{
struct perf_dom_info *dom;
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
int domain = scmi_dev_domain_id(dev);
if (domain < 0)
@@ -690,7 +696,8 @@ static int scmi_dvfs_transition_latency_get(const struct scmi_handle *handle,
static int scmi_dvfs_freq_set(const struct scmi_handle *handle, u32 domain,
unsigned long freq, bool poll)
{
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
struct perf_dom_info *dom = pi->dom_info + domain;
return scmi_perf_level_set(handle, domain, freq / dom->mult_factor,
@@ -702,7 +709,8 @@ static int scmi_dvfs_freq_get(const struct scmi_handle *handle, u32 domain,
{
int ret;
u32 level;
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
struct perf_dom_info *dom = pi->dom_info + domain;
ret = scmi_perf_level_get(handle, domain, &level, poll);
@@ -715,7 +723,8 @@ static int scmi_dvfs_freq_get(const struct scmi_handle *handle, u32 domain,
static int scmi_dvfs_est_power_get(const struct scmi_handle *handle, u32 domain,
unsigned long *freq, unsigned long *power)
{
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
struct perf_dom_info *dom;
unsigned long opp_freq;
int idx, ret = -EINVAL;
@@ -743,7 +752,8 @@ static bool scmi_fast_switch_possible(const struct scmi_handle *handle,
struct device *dev)
{
struct perf_dom_info *dom;
- struct scmi_perf_info *pi = handle->perf_priv;
+ struct scmi_perf_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
dom = pi->dom_info + scmi_dev_domain_id(dev);
@@ -887,9 +897,7 @@ static int scmi_perf_protocol_init(struct scmi_handle *handle)
pinfo->version = version;
handle->perf_ops = &perf_ops;
- handle->perf_priv = pinfo;
-
- return 0;
+ return scmi_set_proto_priv(handle, SCMI_PROTOCOL_PERF, pinfo);
}
static struct scmi_protocol scmi_perf = {
diff --git a/drivers/firmware/arm_scmi/power.c b/drivers/firmware/arm_scmi/power.c
index 42c9c88da07c..e0b29ed4e09a 100644
--- a/drivers/firmware/arm_scmi/power.c
+++ b/drivers/firmware/arm_scmi/power.c
@@ -171,14 +171,16 @@ scmi_power_state_get(const struct scmi_handle *handle, u32 domain, u32 *state)
static int scmi_power_num_domains_get(const struct scmi_handle *handle)
{
- struct scmi_power_info *pi = handle->power_priv;
+ struct scmi_power_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_POWER);
return pi->num_domains;
}
static char *scmi_power_name_get(const struct scmi_handle *handle, u32 domain)
{
- struct scmi_power_info *pi = handle->power_priv;
+ struct scmi_power_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_POWER);
struct power_dom_info *dom = pi->dom_info + domain;
return dom->name;
@@ -296,9 +298,7 @@ static int scmi_power_protocol_init(struct scmi_handle *handle)
pinfo->version = version;
handle->power_ops = &power_ops;
- handle->power_priv = pinfo;
-
- return 0;
+ return scmi_set_proto_priv(handle, SCMI_PROTOCOL_POWER, pinfo);
}
static struct scmi_protocol scmi_power = {
diff --git a/drivers/firmware/arm_scmi/reset.c b/drivers/firmware/arm_scmi/reset.c
index 2caf0bdb6fdc..f70e9b5108d5 100644
--- a/drivers/firmware/arm_scmi/reset.c
+++ b/drivers/firmware/arm_scmi/reset.c
@@ -121,14 +121,16 @@ scmi_reset_domain_attributes_get(const struct scmi_handle *handle, u32 domain,
static int scmi_reset_num_domains_get(const struct scmi_handle *handle)
{
- struct scmi_reset_info *pi = handle->reset_priv;
+ struct scmi_reset_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_RESET);
return pi->num_domains;
}
static char *scmi_reset_name_get(const struct scmi_handle *handle, u32 domain)
{
- struct scmi_reset_info *pi = handle->reset_priv;
+ struct scmi_reset_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_RESET);
struct reset_dom_info *dom = pi->dom_info + domain;
return dom->name;
@@ -136,7 +138,8 @@ static char *scmi_reset_name_get(const struct scmi_handle *handle, u32 domain)
static int scmi_reset_latency_get(const struct scmi_handle *handle, u32 domain)
{
- struct scmi_reset_info *pi = handle->reset_priv;
+ struct scmi_reset_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_RESET);
struct reset_dom_info *dom = pi->dom_info + domain;
return dom->latency_us;
@@ -148,7 +151,8 @@ static int scmi_domain_reset(const struct scmi_handle *handle, u32 domain,
int ret;
struct scmi_xfer *t;
struct scmi_msg_reset_domain_reset *dom;
- struct scmi_reset_info *pi = handle->reset_priv;
+ struct scmi_reset_info *pi =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_RESET);
struct reset_dom_info *rdom = pi->dom_info + domain;
if (rdom->async_reset)
@@ -306,9 +310,7 @@ static int scmi_reset_protocol_init(struct scmi_handle *handle)
pinfo->version = version;
handle->reset_ops = &reset_ops;
- handle->reset_priv = pinfo;
-
- return 0;
+ return scmi_set_proto_priv(handle, SCMI_PROTOCOL_RESET, pinfo);
}
static struct scmi_protocol scmi_reset = {
diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c
index dfe3076d2093..8a0a599558ba 100644
--- a/drivers/firmware/arm_scmi/sensors.c
+++ b/drivers/firmware/arm_scmi/sensors.c
@@ -233,7 +233,8 @@ static int scmi_sensor_reading_get(const struct scmi_handle *handle,
int ret;
struct scmi_xfer *t;
struct scmi_msg_sensor_reading_get *sensor;
- struct sensors_info *si = handle->sensor_priv;
+ struct sensors_info *si =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_SENSOR);
struct scmi_sensor_info *s = si->sensors + sensor_id;
ret = scmi_xfer_get_init(handle, SENSOR_READING_GET,
@@ -265,14 +266,16 @@ static int scmi_sensor_reading_get(const struct scmi_handle *handle,
static const struct scmi_sensor_info *
scmi_sensor_info_get(const struct scmi_handle *handle, u32 sensor_id)
{
- struct sensors_info *si = handle->sensor_priv;
+ struct sensors_info *si =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_SENSOR);
return si->sensors + sensor_id;
}
static int scmi_sensor_count_get(const struct scmi_handle *handle)
{
- struct sensors_info *si = handle->sensor_priv;
+ struct sensors_info *si =
+ scmi_get_proto_priv(handle, SCMI_PROTOCOL_SENSOR);
return si->num_sensors;
}
@@ -362,9 +365,7 @@ static int scmi_sensors_protocol_init(struct scmi_handle *handle)
sinfo->version = version;
handle->sensor_ops = &sensor_ops;
- handle->sensor_priv = sinfo;
-
- return 0;
+ return scmi_set_proto_priv(handle, SCMI_PROTOCOL_SENSOR, sinfo);
}
static struct scmi_protocol scmi_sensors = {
diff --git a/drivers/firmware/arm_scmi/system.c b/drivers/firmware/arm_scmi/system.c
index bcea18bf54ab..8f53f93c63ca 100644
--- a/drivers/firmware/arm_scmi/system.c
+++ b/drivers/firmware/arm_scmi/system.c
@@ -123,9 +123,7 @@ static int scmi_system_protocol_init(struct scmi_handle *handle)
SCMI_SYSTEM_NUM_SOURCES);
pinfo->version = version;
- handle->system_priv = pinfo;
-
- return 0;
+ return scmi_set_proto_priv(handle, SCMI_PROTOCOL_SYSTEM, pinfo);
}
static struct scmi_protocol scmi_system = {
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
index ca23d682941e..bc4f06d46bfb 100644
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -263,16 +263,6 @@ struct scmi_notify_ops {
* @sensor_ops: pointer to set of sensor protocol operations
* @reset_ops: pointer to set of reset protocol operations
* @notify_ops: pointer to set of notifications related operations
- * @perf_priv: pointer to private data structure specific to performance
- * protocol(for internal use only)
- * @clk_priv: pointer to private data structure specific to clock
- * protocol(for internal use only)
- * @power_priv: pointer to private data structure specific to power
- * protocol(for internal use only)
- * @sensor_priv: pointer to private data structure specific to sensors
- * protocol(for internal use only)
- * @reset_priv: pointer to private data structure specific to reset
- * protocol(for internal use only)
* @notify_priv: pointer to private data structure specific to notifications
* (for internal use only)
*/
@@ -285,14 +275,7 @@ struct scmi_handle {
const struct scmi_sensor_ops *sensor_ops;
const struct scmi_reset_ops *reset_ops;
const struct scmi_notify_ops *notify_ops;
- /* for protocol internal use */
- void *perf_priv;
- void *clk_priv;
- void *power_priv;
- void *sensor_priv;
- void *reset_priv;
void *notify_priv;
- void *system_priv;
};
enum scmi_std_protocol {
--
2.17.1
next prev parent reply other threads:[~2020-10-14 15:07 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-14 15:05 [PATCH 00/11] SCMI vendor protocols and modularization Cristian Marussi
2020-10-14 15:05 ` [PATCH 01/11] firmware: arm_scmi: review protocol registration interface Cristian Marussi
2020-10-14 19:03 ` Florian Fainelli
2020-10-14 20:20 ` Sudeep Holla
2020-10-15 8:42 ` Cristian Marussi
2020-10-15 9:41 ` Vincent Guittot
2020-10-15 9:58 ` Cristian Marussi
2020-10-21 2:46 ` Thara Gopinath
2020-10-21 10:08 ` Cristian Marussi
2020-10-14 15:05 ` Cristian Marussi [this message]
2020-10-14 19:19 ` [PATCH 02/11] firmware: arm_scmi: hide protocols' private data Florian Fainelli
2020-10-15 8:52 ` Cristian Marussi
2020-10-14 15:05 ` [PATCH 03/11] firmware: arm_scmi: introduce common protocol interface Cristian Marussi
2020-10-21 2:47 ` Thara Gopinath
2020-10-21 10:27 ` Cristian Marussi
2020-10-26 13:07 ` Thara Gopinath
2020-10-28 21:04 ` Cristian Marussi
2020-10-14 15:05 ` [PATCH 04/11] firmware: arm_scmi: refactor events registration Cristian Marussi
2020-10-14 15:05 ` [PATCH 05/11] firmware: arm_scmi: make notify_priv really private Cristian Marussi
2020-10-14 15:05 ` [PATCH 06/11] firmware: arm_scmi: add support for protocol modularization Cristian Marussi
2020-10-21 2:47 ` Thara Gopinath
2020-10-21 10:30 ` Cristian Marussi
2020-10-14 15:05 ` [PATCH 07/11] [DEBUG] firmware: arm_scmi: add example custom protocol Cristian Marussi
2020-10-14 15:05 ` [PATCH 08/11] [DEBUG] arm64: dts: juno: add example custom protocol support Cristian Marussi
2020-10-14 15:05 ` [PATCH 09/11] [DEBUG] firmware: arm_scmi: add example SCMI driver for custom protocol Cristian Marussi
2020-10-14 15:55 ` Randy Dunlap
2020-10-14 16:44 ` Cristian Marussi
2020-10-14 15:05 ` [PATCH 10/11] [DEBUG] firmware: arm_scmi: add custom_dummy SCMI devname Cristian Marussi
2020-10-21 2:49 ` Thara Gopinath
2020-10-21 11:35 ` Cristian Marussi
2020-10-26 12:37 ` Thara Gopinath
2020-10-28 21:28 ` Cristian Marussi
2020-10-14 15:05 ` [PATCH 11/11] [DEBUG][HACK] firmware: arm_scmi: force implemented protocol 0x99 Cristian Marussi
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