struct net_device;
struct platform_device;
-struct ipa_clock;
+struct ipa_power;
struct ipa_smp2p;
struct ipa_interrupt;
* @nb: Notifier block used for remoteproc SSR
* @notifier: Remoteproc SSR notifier
* @smp2p: SMP2P information
- * @clock: IPA clocking information
+ * @power: IPA power information
* @table_addr: DMA address of filter/route table content
* @table_virt: Virtual address of filter/route table content
* @interrupt: IPA Interrupt information
- * @uc_clocked: true if clock is active by proxy for microcontroller
+ * @uc_powered: true if power is active by proxy for microcontroller
* @uc_loaded: true after microcontroller has reported it's ready
* @reg_addr: DMA address used for IPA register access
* @reg_virt: Virtual address used for IPA register access
struct notifier_block nb;
void *notifier;
struct ipa_smp2p *smp2p;
- struct ipa_clock *clock;
+ struct ipa_power *power;
dma_addr_t table_addr;
__le64 *table_virt;
struct ipa_interrupt *interrupt;
- bool uc_clocked;
+ bool uc_powered;
bool uc_loaded;
dma_addr_t reg_addr;
*
* Activities performed at the init stage can be done without requiring
* any access to IPA hardware. Activities performed at the config stage
- * require the IPA clock to be running, because they involve access
- * to IPA registers. The setup stage is performed only after the GSI
- * hardware is ready (more on this below). The setup stage allows
- * the AP to perform more complex initialization by issuing "immediate
- * commands" using a special interface to the IPA.
+ * require IPA power, because they involve access to IPA registers.
+ * The setup stage is performed only after the GSI hardware is ready
+ * (more on this below). The setup stage allows the AP to perform
+ * more complex initialization by issuing "immediate commands" using
+ * a special interface to the IPA.
*
* This function, @ipa_setup(), starts the setup stage.
*
#include "ipa_data.h"
/**
- * DOC: IPA Clocking
+ * DOC: IPA Power Management
*
- * The "IPA Clock" manages both the IPA core clock and the interconnects
- * (buses) the IPA depends on as a single logical entity. A reference count
- * is incremented by "get" operations and decremented by "put" operations.
- * Transitions of that count from 0 to 1 result in the clock and interconnects
- * being enabled, and transitions of the count from 1 to 0 cause them to be
- * disabled. We currently operate the core clock at a fixed clock rate, and
- * all buses at a fixed average and peak bandwidth. As more advanced IPA
- * features are enabled, we can make better use of clock and bus scaling.
+ * The IPA hardware is enabled when the IPA core clock and all the
+ * interconnects (buses) it depends on are enabled. Runtime power
+ * management is used to determine whether the core clock and
+ * interconnects are enabled, and if not in use to be suspended
+ * automatically.
*
- * An IPA clock reference must be held for any access to IPA hardware.
+ * The core clock currently runs at a fixed clock rate when enabled,
+ * an all interconnects use a fixed average and peak bandwidth.
*/
#define IPA_AUTOSUSPEND_DELAY 500 /* milliseconds */
};
/**
- * struct ipa_clock - IPA clocking information
+ * struct ipa_power - IPA power management information
* @dev: IPA device pointer
* @core: IPA core clock
* @spinlock: Protects modem TX queue enable/disable
* @interconnect_count: Number of elements in interconnect[]
* @interconnect: Interconnect array
*/
-struct ipa_clock {
+struct ipa_power {
struct device *dev;
struct clk *core;
spinlock_t spinlock; /* used with STOPPED/STARTED power flags */
}
/* Initialize interconnects required for IPA operation */
-static int ipa_interconnect_init(struct ipa_clock *clock, struct device *dev,
+static int ipa_interconnect_init(struct ipa_power *power, struct device *dev,
const struct ipa_interconnect_data *data)
{
struct ipa_interconnect *interconnect;
u32 count;
int ret;
- count = clock->interconnect_count;
+ count = power->interconnect_count;
interconnect = kcalloc(count, sizeof(*interconnect), GFP_KERNEL);
if (!interconnect)
return -ENOMEM;
- clock->interconnect = interconnect;
+ power->interconnect = interconnect;
while (count--) {
ret = ipa_interconnect_init_one(dev, interconnect, data++);
return 0;
out_unwind:
- while (interconnect-- > clock->interconnect)
+ while (interconnect-- > power->interconnect)
ipa_interconnect_exit_one(interconnect);
- kfree(clock->interconnect);
- clock->interconnect = NULL;
+ kfree(power->interconnect);
+ power->interconnect = NULL;
return ret;
}
/* Inverse of ipa_interconnect_init() */
-static void ipa_interconnect_exit(struct ipa_clock *clock)
+static void ipa_interconnect_exit(struct ipa_power *power)
{
struct ipa_interconnect *interconnect;
- interconnect = clock->interconnect + clock->interconnect_count;
- while (interconnect-- > clock->interconnect)
+ interconnect = power->interconnect + power->interconnect_count;
+ while (interconnect-- > power->interconnect)
ipa_interconnect_exit_one(interconnect);
- kfree(clock->interconnect);
- clock->interconnect = NULL;
+ kfree(power->interconnect);
+ power->interconnect = NULL;
}
/* Currently we only use one bandwidth level, so just "enable" interconnects */
static int ipa_interconnect_enable(struct ipa *ipa)
{
struct ipa_interconnect *interconnect;
- struct ipa_clock *clock = ipa->clock;
+ struct ipa_power *power = ipa->power;
int ret;
u32 i;
- interconnect = clock->interconnect;
- for (i = 0; i < clock->interconnect_count; i++) {
+ interconnect = power->interconnect;
+ for (i = 0; i < power->interconnect_count; i++) {
ret = icc_set_bw(interconnect->path,
interconnect->average_bandwidth,
interconnect->peak_bandwidth);
return 0;
out_unwind:
- while (interconnect-- > clock->interconnect)
+ while (interconnect-- > power->interconnect)
(void)icc_set_bw(interconnect->path, 0, 0);
return ret;
static int ipa_interconnect_disable(struct ipa *ipa)
{
struct ipa_interconnect *interconnect;
- struct ipa_clock *clock = ipa->clock;
+ struct ipa_power *power = ipa->power;
struct device *dev = &ipa->pdev->dev;
int result = 0;
u32 count;
int ret;
- count = clock->interconnect_count;
- interconnect = clock->interconnect + count;
+ count = power->interconnect_count;
+ interconnect = power->interconnect + count;
while (count--) {
interconnect--;
ret = icc_set_bw(interconnect->path, 0, 0);
return result;
}
-/* Turn on IPA clocks, including interconnects */
-static int ipa_clock_enable(struct ipa *ipa)
+/* Enable IPA power, enabling interconnects and the core clock */
+static int ipa_power_enable(struct ipa *ipa)
{
int ret;
if (ret)
return ret;
- ret = clk_prepare_enable(ipa->clock->core);
+ ret = clk_prepare_enable(ipa->power->core);
if (ret) {
dev_err(&ipa->pdev->dev, "error %d enabling core clock\n", ret);
(void)ipa_interconnect_disable(ipa);
return ret;
}
-/* Inverse of ipa_clock_enable() */
-static int ipa_clock_disable(struct ipa *ipa)
+/* Inverse of ipa_power_enable() */
+static int ipa_power_disable(struct ipa *ipa)
{
- clk_disable_unprepare(ipa->clock->core);
+ clk_disable_unprepare(ipa->power->core);
return ipa_interconnect_disable(ipa);
}
/* Endpoints aren't usable until setup is complete */
if (ipa->setup_complete) {
- __clear_bit(IPA_POWER_FLAG_RESUMED, ipa->clock->flags);
+ __clear_bit(IPA_POWER_FLAG_RESUMED, ipa->power->flags);
ipa_endpoint_suspend(ipa);
gsi_suspend(&ipa->gsi);
}
- return ipa_clock_disable(ipa);
+ return ipa_power_disable(ipa);
}
static int ipa_runtime_resume(struct device *dev)
struct ipa *ipa = dev_get_drvdata(dev);
int ret;
- ret = ipa_clock_enable(ipa);
+ ret = ipa_power_enable(ipa);
if (WARN_ON(ret < 0))
return ret;
{
struct ipa *ipa = dev_get_drvdata(dev);
- __set_bit(IPA_POWER_FLAG_SYSTEM, ipa->clock->flags);
+ __set_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags);
return pm_runtime_force_suspend(dev);
}
ret = pm_runtime_force_resume(dev);
- __clear_bit(IPA_POWER_FLAG_SYSTEM, ipa->clock->flags);
+ __clear_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags);
return ret;
}
/* Return the current IPA core clock rate */
-u32 ipa_clock_rate(struct ipa *ipa)
+u32 ipa_core_clock_rate(struct ipa *ipa)
{
- return ipa->clock ? (u32)clk_get_rate(ipa->clock->core) : 0;
+ return ipa->power ? (u32)clk_get_rate(ipa->power->core) : 0;
}
/**
* just to handle the interrupt, so we're done. If we are in a
* system suspend, trigger a system resume.
*/
- if (!__test_and_set_bit(IPA_POWER_FLAG_RESUMED, ipa->clock->flags))
- if (test_bit(IPA_POWER_FLAG_SYSTEM, ipa->clock->flags))
+ if (!__test_and_set_bit(IPA_POWER_FLAG_RESUMED, ipa->power->flags))
+ if (test_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags))
pm_wakeup_dev_event(&ipa->pdev->dev, 0, true);
/* Acknowledge/clear the suspend interrupt on all endpoints */
*/
void ipa_power_modem_queue_stop(struct ipa *ipa)
{
- struct ipa_clock *clock = ipa->clock;
+ struct ipa_power *power = ipa->power;
unsigned long flags;
- spin_lock_irqsave(&clock->spinlock, flags);
+ spin_lock_irqsave(&power->spinlock, flags);
- if (!__test_and_clear_bit(IPA_POWER_FLAG_STARTED, clock->flags)) {
+ if (!__test_and_clear_bit(IPA_POWER_FLAG_STARTED, power->flags)) {
netif_stop_queue(ipa->modem_netdev);
- __set_bit(IPA_POWER_FLAG_STOPPED, clock->flags);
+ __set_bit(IPA_POWER_FLAG_STOPPED, power->flags);
}
- spin_unlock_irqrestore(&clock->spinlock, flags);
+ spin_unlock_irqrestore(&power->spinlock, flags);
}
/* This function starts the modem netdev transmit queue, but only if the
*/
void ipa_power_modem_queue_wake(struct ipa *ipa)
{
- struct ipa_clock *clock = ipa->clock;
+ struct ipa_power *power = ipa->power;
unsigned long flags;
- spin_lock_irqsave(&clock->spinlock, flags);
+ spin_lock_irqsave(&power->spinlock, flags);
- if (__test_and_clear_bit(IPA_POWER_FLAG_STOPPED, clock->flags)) {
- __set_bit(IPA_POWER_FLAG_STARTED, clock->flags);
+ if (__test_and_clear_bit(IPA_POWER_FLAG_STOPPED, power->flags)) {
+ __set_bit(IPA_POWER_FLAG_STARTED, power->flags);
netif_wake_queue(ipa->modem_netdev);
}
- spin_unlock_irqrestore(&clock->spinlock, flags);
+ spin_unlock_irqrestore(&power->spinlock, flags);
}
/* This function clears the STARTED flag once the TX queue is operating */
void ipa_power_modem_queue_active(struct ipa *ipa)
{
- clear_bit(IPA_POWER_FLAG_STARTED, ipa->clock->flags);
+ clear_bit(IPA_POWER_FLAG_STARTED, ipa->power->flags);
}
int ipa_power_setup(struct ipa *ipa)
ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);
}
-/* Initialize IPA clocking */
-struct ipa_clock *
-ipa_clock_init(struct device *dev, const struct ipa_clock_data *data)
+/* Initialize IPA power management */
+struct ipa_power *
+ipa_power_init(struct device *dev, const struct ipa_power_data *data)
{
- struct ipa_clock *clock;
+ struct ipa_power *power;
struct clk *clk;
int ret;
goto err_clk_put;
}
- clock = kzalloc(sizeof(*clock), GFP_KERNEL);
- if (!clock) {
+ power = kzalloc(sizeof(*power), GFP_KERNEL);
+ if (!power) {
ret = -ENOMEM;
goto err_clk_put;
}
- clock->dev = dev;
- clock->core = clk;
- spin_lock_init(&clock->spinlock);
- clock->interconnect_count = data->interconnect_count;
+ power->dev = dev;
+ power->core = clk;
+ spin_lock_init(&power->spinlock);
+ power->interconnect_count = data->interconnect_count;
- ret = ipa_interconnect_init(clock, dev, data->interconnect_data);
+ ret = ipa_interconnect_init(power, dev, data->interconnect_data);
if (ret)
goto err_kfree;
pm_runtime_use_autosuspend(dev);
pm_runtime_enable(dev);
- return clock;
+ return power;
err_kfree:
- kfree(clock);
+ kfree(power);
err_clk_put:
clk_put(clk);
return ERR_PTR(ret);
}
-/* Inverse of ipa_clock_init() */
-void ipa_clock_exit(struct ipa_clock *clock)
+/* Inverse of ipa_power_init() */
+void ipa_power_exit(struct ipa_power *power)
{
- struct device *dev = clock->dev;
- struct clk *clk = clock->core;
+ struct device *dev = power->dev;
+ struct clk *clk = power->core;
pm_runtime_disable(dev);
pm_runtime_dont_use_autosuspend(dev);
- ipa_interconnect_exit(clock);
- kfree(clock);
+ ipa_interconnect_exit(power);
+ kfree(power);
clk_put(clk);
}
struct device;
struct ipa;
-struct ipa_clock_data;
+struct ipa_power_data;
/* IPA device power management function block */
extern const struct dev_pm_ops ipa_pm_ops;
/**
- * ipa_clock_rate() - Return the current IPA core clock rate
+ * ipa_core_clock_rate() - Return the current IPA core clock rate
* @ipa: IPA structure
*
* Return: The current clock rate (in Hz), or 0.
*/
-u32 ipa_clock_rate(struct ipa *ipa);
+u32 ipa_core_clock_rate(struct ipa *ipa);
/**
* ipa_power_modem_queue_stop() - Possibly stop the modem netdev TX queue
void ipa_power_teardown(struct ipa *ipa);
/**
- * ipa_clock_init() - Initialize IPA clocking
+ * ipa_power_init() - Initialize IPA power management
* @dev: IPA device
* @data: Clock configuration data
*
- * Return: A pointer to an ipa_clock structure, or a pointer-coded error
+ * Return: A pointer to an ipa_power structure, or a pointer-coded error
*/
-struct ipa_clock *ipa_clock_init(struct device *dev,
- const struct ipa_clock_data *data);
+struct ipa_power *ipa_power_init(struct device *dev,
+ const struct ipa_power_data *data);
/**
- * ipa_clock_exit() - Inverse of ipa_clock_init()
- * @clock: IPA clock pointer
+ * ipa_power_exit() - Inverse of ipa_power_init()
+ * @power: IPA power pointer
*/
-void ipa_clock_exit(struct ipa_clock *clock);
+void ipa_power_exit(struct ipa_power *power);
#endif /* _IPA_CLOCK_H_ */
};
/* Clock and interconnect configuration data for an SoC having IPA v3.1 */
-static const struct ipa_clock_data ipa_clock_data = {
+static const struct ipa_power_data ipa_power_data = {
.core_clock_rate = 16 * 1000 * 1000, /* Hz */
.interconnect_count = ARRAY_SIZE(ipa_interconnect_data),
.interconnect_data = ipa_interconnect_data,
.endpoint_data = ipa_gsi_endpoint_data,
.resource_data = &ipa_resource_data,
.mem_data = &ipa_mem_data,
- .clock_data = &ipa_clock_data,
+ .power_data = &ipa_power_data,
};
};
/* Clock and interconnect configuration data for an SoC having IPA v3.5.1 */
-static const struct ipa_clock_data ipa_clock_data = {
+static const struct ipa_power_data ipa_power_data = {
.core_clock_rate = 75 * 1000 * 1000, /* Hz */
.interconnect_count = ARRAY_SIZE(ipa_interconnect_data),
.interconnect_data = ipa_interconnect_data,
.endpoint_data = ipa_gsi_endpoint_data,
.resource_data = &ipa_resource_data,
.mem_data = &ipa_mem_data,
- .clock_data = &ipa_clock_data,
+ .power_data = &ipa_power_data,
};
};
/* Clock and interconnect configuration data for an SoC having IPA v4.11 */
-static const struct ipa_clock_data ipa_clock_data = {
+static const struct ipa_power_data ipa_power_data = {
.core_clock_rate = 60 * 1000 * 1000, /* Hz */
.interconnect_count = ARRAY_SIZE(ipa_interconnect_data),
.interconnect_data = ipa_interconnect_data,
.endpoint_data = ipa_gsi_endpoint_data,
.resource_data = &ipa_resource_data,
.mem_data = &ipa_mem_data,
- .clock_data = &ipa_clock_data,
+ .power_data = &ipa_power_data,
};
};
/* Clock and interconnect configuration data for an SoC having IPA v4.2 */
-static const struct ipa_clock_data ipa_clock_data = {
+static const struct ipa_power_data ipa_power_data = {
.core_clock_rate = 100 * 1000 * 1000, /* Hz */
.interconnect_count = ARRAY_SIZE(ipa_interconnect_data),
.interconnect_data = ipa_interconnect_data,
.endpoint_data = ipa_gsi_endpoint_data,
.resource_data = &ipa_resource_data,
.mem_data = &ipa_mem_data,
- .clock_data = &ipa_clock_data,
+ .power_data = &ipa_power_data,
};
};
/* Clock and interconnect configuration data for an SoC having IPA v4.5 */
-static const struct ipa_clock_data ipa_clock_data = {
+static const struct ipa_power_data ipa_power_data = {
.core_clock_rate = 150 * 1000 * 1000, /* Hz (150? 60?) */
.interconnect_count = ARRAY_SIZE(ipa_interconnect_data),
.interconnect_data = ipa_interconnect_data,
.endpoint_data = ipa_gsi_endpoint_data,
.resource_data = &ipa_resource_data,
.mem_data = &ipa_mem_data,
- .clock_data = &ipa_clock_data,
+ .power_data = &ipa_power_data,
};
};
/* Clock and interconnect configuration data for an SoC having IPA v4.9 */
-static const struct ipa_clock_data ipa_clock_data = {
+static const struct ipa_power_data ipa_power_data = {
.core_clock_rate = 60 * 1000 * 1000, /* Hz */
.interconnect_count = ARRAY_SIZE(ipa_interconnect_data),
.interconnect_data = ipa_interconnect_data,
.endpoint_data = ipa_gsi_endpoint_data,
.resource_data = &ipa_resource_data,
.mem_data = &ipa_mem_data,
- .clock_data = &ipa_clock_data,
+ .power_data = &ipa_power_data,
};
* IPA and GSI resources to use for a given platform. This data is supplied
* via the Device Tree match table, associated with a particular compatible
* string. The data defines information about how resources, endpoints and
- * channels, memory, clocking and so on are allocated and used for the
+ * channels, memory, power and so on are allocated and used for the
* platform.
*
* Resources are data structures used internally by the IPA hardware. The
};
/**
- * struct ipa_clock_data - description of IPA clock and interconnect rates
+ * struct ipa_power_data - description of IPA power configuration data
* @core_clock_rate: Core clock rate (Hz)
* @interconnect_count: Number of entries in the interconnect_data array
* @interconnect_data: IPA interconnect configuration data
*/
-struct ipa_clock_data {
+struct ipa_power_data {
u32 core_clock_rate;
u32 interconnect_count; /* # entries in interconnect_data[] */
const struct ipa_interconnect_data *interconnect_data;
* @endpoint_data: IPA endpoint/GSI channel data
* @resource_data: IPA resource configuration data
* @mem_data: IPA memory region data
- * @clock_data: IPA clock and interconnect data
+ * @power_data: IPA power data
*/
struct ipa_data {
enum ipa_version version;
const struct ipa_gsi_endpoint_data *endpoint_data;
const struct ipa_resource_data *resource_data;
const struct ipa_mem_data *mem_data;
- const struct ipa_clock_data *clock_data;
+ const struct ipa_power_data *power_data;
};
extern const struct ipa_data ipa_data_v3_1;
return hol_block_timer_qtime_val(ipa, microseconds);
/* Use 64 bit arithmetic to avoid overflow... */
- rate = ipa_clock_rate(ipa);
+ rate = ipa_core_clock_rate(ipa);
ticks = DIV_ROUND_CLOSEST(microseconds * rate, 128 * USEC_PER_SEC);
/* ...but we still need to fit into a 32-bit register */
WARN_ON(ticks > U32_MAX);
* @ipa: IPA pointer
*
* Configures when the IPA signals it is idle to the global clock
- * controller, which can respond by scalling down the clock to
- * save power.
+ * controller, which can respond by scaling down the clock to save
+ * power.
*/
static void ipa_hardware_dcd_config(struct ipa *ipa)
{
* @ipa: IPA pointer
* @data: IPA configuration data
*
- * Perform initialization requiring IPA clock to be enabled.
+ * Perform initialization requiring IPA power to be enabled.
*/
static int ipa_config(struct ipa *ipa, const struct ipa_data *data)
{
* in several stages:
* - The "init" stage involves activities that can be initialized without
* access to the IPA hardware.
- * - The "config" stage requires the IPA clock to be active so IPA registers
+ * - The "config" stage requires IPA power to be active so IPA registers
* can be accessed, but does not require the use of IPA immediate commands.
* - The "setup" stage uses IPA immediate commands, and so requires the GSI
* layer to be initialized.
{
struct device *dev = &pdev->dev;
const struct ipa_data *data;
- struct ipa_clock *clock;
+ struct ipa_power *power;
bool modem_init;
struct ipa *ipa;
int ret;
ipa_validate_build();
- /* Get configuration data early; needed for clock initialization */
+ /* Get configuration data early; needed for power initialization */
data = of_device_get_match_data(dev);
if (!data) {
dev_err(dev, "matched hardware not supported\n");
/* The clock and interconnects might not be ready when we're
* probed, so might return -EPROBE_DEFER.
*/
- clock = ipa_clock_init(dev, data->clock_data);
- if (IS_ERR(clock))
- return PTR_ERR(clock);
+ power = ipa_power_init(dev, data->power_data);
+ if (IS_ERR(power))
+ return PTR_ERR(power);
/* No more EPROBE_DEFER. Allocate and initialize the IPA structure */
ipa = kzalloc(sizeof(*ipa), GFP_KERNEL);
if (!ipa) {
ret = -ENOMEM;
- goto err_clock_exit;
+ goto err_power_exit;
}
ipa->pdev = pdev;
dev_set_drvdata(dev, ipa);
- ipa->clock = clock;
+ ipa->power = power;
ipa->version = data->version;
init_completion(&ipa->completion);
if (ret)
goto err_table_exit;
- /* The clock needs to be active for config and setup */
+ /* Power needs to be active for config and setup */
ret = pm_runtime_get_sync(dev);
if (WARN_ON(ret < 0))
goto err_power_put;
ipa_reg_exit(ipa);
err_kfree_ipa:
kfree(ipa);
-err_clock_exit:
- ipa_clock_exit(clock);
+err_power_exit:
+ ipa_power_exit(power);
return ret;
}
static int ipa_remove(struct platform_device *pdev)
{
struct ipa *ipa = dev_get_drvdata(&pdev->dev);
- struct ipa_clock *clock = ipa->clock;
+ struct ipa_power *power = ipa->power;
struct device *dev = &pdev->dev;
int ret;
ipa_mem_exit(ipa);
ipa_reg_exit(ipa);
kfree(ipa);
- ipa_clock_exit(clock);
+ ipa_power_exit(power);
return 0;
}
switch (action) {
case QCOM_SSR_BEFORE_POWERUP:
dev_info(dev, "received modem starting event\n");
- ipa_uc_clock(ipa);
+ ipa_uc_power(ipa);
ipa_smp2p_notify_reset(ipa);
break;
* SMP2P is a primitive communication mechanism available between the AP and
* the modem. The IPA driver uses this for two purposes: to enable the modem
* to state that the GSI hardware is ready to use; and to communicate the
- * state of the IPA clock in the event of a crash.
+ * state of IPA power in the event of a crash.
*
* GSI needs to have early initialization completed before it can be used.
* This initialization is done either by Trust Zone or by the modem. In the
* latter case, the modem uses an SMP2P interrupt to tell the AP IPA driver
* when the GSI is ready to use.
*
- * The modem is also able to inquire about the current state of the IPA
- * clock by trigging another SMP2P interrupt to the AP. We communicate
- * whether the clock is enabled using two SMP2P state bits--one to
- * indicate the clock state (on or off), and a second to indicate the
- * clock state bit is valid. The modem will poll the valid bit until it
- * is set, and at that time records whether the AP has the IPA clock enabled.
+ * The modem is also able to inquire about the current state of IPA
+ * power by trigging another SMP2P interrupt to the AP. We communicate
+ * whether power is enabled using two SMP2P state bits--one to indicate
+ * the power state (on or off), and a second to indicate the power state
+ * bit is valid. The modem will poll the valid bit until it is set, and
+ * at that time records whether the AP has IPA power enabled.
*
* Finally, if the AP kernel panics, we update the SMP2P state bits even if
* we never receive an interrupt from the modem requesting this.
* struct ipa_smp2p - IPA SMP2P information
* @ipa: IPA pointer
* @valid_state: SMEM state indicating enabled state is valid
- * @enabled_state: SMEM state to indicate clock is enabled
+ * @enabled_state: SMEM state to indicate power is enabled
* @valid_bit: Valid bit in 32-bit SMEM state mask
* @enabled_bit: Enabled bit in 32-bit SMEM state mask
* @enabled_bit: Enabled bit in 32-bit SMEM state mask
- * @clock_query_irq: IPA interrupt triggered by modem for clock query
+ * @clock_query_irq: IPA interrupt triggered by modem for power query
* @setup_ready_irq: IPA interrupt triggered by modem to signal GSI ready
- * @clock_on: Whether IPA clock is on
- * @notified: Whether modem has been notified of clock state
+ * @power_on: Whether IPA power is on
+ * @notified: Whether modem has been notified of power state
* @disabled: Whether setup ready interrupt handling is disabled
* @mutex: Mutex protecting ready-interrupt/shutdown interlock
* @panic_notifier: Panic notifier structure
u32 enabled_bit;
u32 clock_query_irq;
u32 setup_ready_irq;
- bool clock_on;
+ bool power_on;
bool notified;
bool disabled;
struct mutex mutex;
};
/**
- * ipa_smp2p_notify() - use SMP2P to tell modem about IPA clock state
+ * ipa_smp2p_notify() - use SMP2P to tell modem about IPA power state
* @smp2p: SMP2P information
*
* This is called either when the modem has requested it (by triggering
- * the modem clock query IPA interrupt) or whenever the AP is shutting down
+ * the modem power query IPA interrupt) or whenever the AP is shutting down
* (via a panic notifier). It sets the two SMP2P state bits--one saying
- * whether the IPA clock is running, and the other indicating the first bit
+ * whether the IPA power is on, and the other indicating the first bit
* is valid.
*/
static void ipa_smp2p_notify(struct ipa_smp2p *smp2p)
return;
dev = &smp2p->ipa->pdev->dev;
- smp2p->clock_on = pm_runtime_get_if_active(dev, true) > 0;
+ smp2p->power_on = pm_runtime_get_if_active(dev, true) > 0;
- /* Signal whether the clock is enabled */
+ /* Signal whether the IPA power is enabled */
mask = BIT(smp2p->enabled_bit);
- value = smp2p->clock_on ? mask : 0;
+ value = smp2p->power_on ? mask : 0;
qcom_smem_state_update_bits(smp2p->enabled_state, mask, value);
/* Now indicate that the enabled flag is valid */
ipa_smp2p_notify(smp2p);
- if (smp2p->clock_on)
+ if (smp2p->power_on)
ipa_uc_panic_notifier(smp2p->ipa);
return NOTIFY_DONE;
free_irq(irq, smp2p);
}
-/* Drop the clock reference if it was taken in ipa_smp2p_notify() */
-static void ipa_smp2p_clock_release(struct ipa *ipa)
+/* Drop the power reference if it was taken in ipa_smp2p_notify() */
+static void ipa_smp2p_power_release(struct ipa *ipa)
{
struct device *dev = &ipa->pdev->dev;
- if (!ipa->smp2p->clock_on)
+ if (!ipa->smp2p->power_on)
return;
pm_runtime_mark_last_busy(dev);
(void)pm_runtime_put_autosuspend(dev);
- ipa->smp2p->clock_on = false;
+ ipa->smp2p->power_on = false;
}
/* Initialize the IPA SMP2P subsystem */
smp2p->ipa = ipa;
- /* These fields are needed by the clock query interrupt
+ /* These fields are needed by the power query interrupt
* handler, so initialize them now.
*/
mutex_init(&smp2p->mutex);
ipa_smp2p_irq_exit(smp2p, smp2p->setup_ready_irq);
ipa_smp2p_panic_notifier_unregister(smp2p);
ipa_smp2p_irq_exit(smp2p, smp2p->clock_query_irq);
- /* We won't get notified any more; drop clock reference (if any) */
- ipa_smp2p_clock_release(ipa);
+ /* We won't get notified any more; drop power reference (if any) */
+ ipa_smp2p_power_release(ipa);
ipa->smp2p = NULL;
mutex_destroy(&smp2p->mutex);
kfree(smp2p);
if (!smp2p->notified)
return;
- ipa_smp2p_clock_release(ipa);
+ ipa_smp2p_power_release(ipa);
- /* Reset the clock enabled valid flag */
+ /* Reset the power enabled valid flag */
mask = BIT(smp2p->valid_bit);
qcom_smem_state_update_bits(smp2p->valid_state, mask, 0);
- /* Mark the clock disabled for good measure... */
+ /* Mark the power disabled for good measure... */
mask = BIT(smp2p->enabled_bit);
qcom_smem_state_update_bits(smp2p->enabled_state, mask, 0);
* ipa_smp2p_notify_reset() - Reset modem notification state
* @ipa: IPA pointer
*
- * If the modem crashes it queries the IPA clock state. In cleaning
+ * If the modem crashes it queries the IPA power state. In cleaning
* up after such a crash this is used to reset some state maintained
* for managing this notification.
*/
* should only receive responses from the microcontroller when it has
* sent it a request message.
*
- * We can drop the clock reference taken in ipa_uc_clock() once we
+ * We can drop the power reference taken in ipa_uc_power() once we
* know the microcontroller has finished its initialization.
*/
switch (shared->response) {
case IPA_UC_RESPONSE_INIT_COMPLETED:
- if (ipa->uc_clocked) {
+ if (ipa->uc_powered) {
ipa->uc_loaded = true;
pm_runtime_mark_last_busy(dev);
(void)pm_runtime_put_autosuspend(dev);
- ipa->uc_clocked = false;
+ ipa->uc_powered = false;
} else {
dev_warn(dev, "unexpected init_completed response\n");
}
/* Configure the IPA microcontroller subsystem */
void ipa_uc_config(struct ipa *ipa)
{
- ipa->uc_clocked = false;
+ ipa->uc_powered = false;
ipa->uc_loaded = false;
ipa_interrupt_add(ipa->interrupt, IPA_IRQ_UC_0, ipa_uc_event_handler);
ipa_interrupt_add(ipa->interrupt, IPA_IRQ_UC_1, ipa_uc_response_hdlr);
ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_UC_1);
ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_UC_0);
- if (!ipa->uc_clocked)
+ if (!ipa->uc_powered)
return;
pm_runtime_mark_last_busy(dev);
(void)pm_runtime_put_autosuspend(dev);
}
-/* Take a proxy clock reference for the microcontroller */
-void ipa_uc_clock(struct ipa *ipa)
+/* Take a proxy power reference for the microcontroller */
+void ipa_uc_power(struct ipa *ipa)
{
static bool already;
struct device *dev;
pm_runtime_put_noidle(dev);
dev_err(dev, "error %d getting proxy power\n", ret);
} else {
- ipa->uc_clocked = true;
+ ipa->uc_powered = true;
}
}
void ipa_uc_deconfig(struct ipa *ipa);
/**
- * ipa_uc_clock() - Take a proxy clock reference for the microcontroller
+ * ipa_uc_power() - Take a proxy power reference for the microcontroller
* @ipa: IPA pointer
*
* The first time the modem boots, it loads firmware for and starts the
* IPA-resident microcontroller. The microcontroller signals that it
* has completed its initialization by sending an INIT_COMPLETED response
- * message to the AP. The AP must ensure the IPA core clock is operating
- * until it receives this message, and to do so we take a "proxy" clock
+ * message to the AP. The AP must ensure the IPA is powered until
+ * it receives this message, and to do so we take a "proxy" clock
* reference on its behalf here. Once we receive the INIT_COMPLETED
- * message (in ipa_uc_response_hdlr()) we drop this clock reference.
+ * message (in ipa_uc_response_hdlr()) we drop this power reference.
*/
-void ipa_uc_clock(struct ipa *ipa);
+void ipa_uc_power(struct ipa *ipa);
/**
* ipa_uc_panic_notifier()
projects / platform / kernel / linux-rpi.git / commitdiff