compat-$(CONFIG_COMPAT_KERNEL_21) += compat-2.6.21.o
compat-$(CONFIG_COMPAT_KERNEL_22) += compat-2.6.22.o
compat-$(CONFIG_COMPAT_KERNEL_23) += compat-2.6.23.o
-compat-$(CONFIG_COMPAT_KERNEL_24) += compat-2.6.24.o
+
+compat-$(CONFIG_COMPAT_KERNEL_24) += \
+ compat-2.6.24.o \
+ pm_qos_params.o
+
compat-$(CONFIG_COMPAT_KERNEL_25) += compat-2.6.25.o
compat-$(CONFIG_COMPAT_KERNEL_26) += compat-2.6.26.o
compat-$(CONFIG_COMPAT_KERNEL_27) += compat-2.6.27.o
* Compatibility file for Linux wireless for kernels 2.6.25.
*/
-#include <net/compat.h>
-
/* All things not in 2.6.22, 2.6.23 and 2.6.24 */
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
#include <linux/miscdevice.h>
-/*
- * Backport work for QoS dependencies (kernel/pm_qos_params.c)
- * pm-qos stuff written by mark gross mgross@linux.intel.com.
- *
- * ipw2100 now makes use of
- * pm_qos_add_requirement(),
- * pm_qos_update_requirement() and
- * pm_qos_remove_requirement() from it
- *
- * mac80211 uses the network latency to determine if to enable or not
- * dynamic PS. mac80211 also and registers a notifier for when
- * the latency changes. Since older kernels do no thave pm-qos stuff
- * we just implement it completley here and register it upon cfg80211
- * init. I haven't tested ipw2100 on 2.6.24 though.
- *
- * This is copied from the kernel written by mark gross mgross@linux.intel.com
- */
-
-/*
- * locking rule: all changes to target_value or requirements or notifiers lists
- * or pm_qos_object list and pm_qos_objects need to happen with pm_qos_lock
- * held, taken with _irqsave. One lock to rule them all
- */
-struct requirement_list {
- struct list_head list;
- union {
- s32 value;
- s32 usec;
- s32 kbps;
- };
- char *name;
-};
-
-static s32 max_compare(s32 v1, s32 v2);
-static s32 min_compare(s32 v1, s32 v2);
-
-struct pm_qos_object {
- struct requirement_list requirements;
- struct blocking_notifier_head *notifiers;
- struct miscdevice pm_qos_power_miscdev;
- char *name;
- s32 default_value;
- s32 target_value;
- s32 (*comparitor)(s32, s32);
-};
-
-static struct pm_qos_object null_pm_qos;
-static BLOCKING_NOTIFIER_HEAD(cpu_dma_lat_notifier);
-static struct pm_qos_object cpu_dma_pm_qos = {
- .requirements = {LIST_HEAD_INIT(cpu_dma_pm_qos.requirements.list)},
- .notifiers = &cpu_dma_lat_notifier,
- .name = "cpu_dma_latency",
- .default_value = 2000 * USEC_PER_SEC,
- .target_value = 2000 * USEC_PER_SEC,
- .comparitor = min_compare
-};
-
-static BLOCKING_NOTIFIER_HEAD(network_lat_notifier);
-static struct pm_qos_object network_lat_pm_qos = {
- .requirements = {LIST_HEAD_INIT(network_lat_pm_qos.requirements.list)},
- .notifiers = &network_lat_notifier,
- .name = "network_latency",
- .default_value = 2000 * USEC_PER_SEC,
- .target_value = 2000 * USEC_PER_SEC,
- .comparitor = min_compare
-};
-
-
-static BLOCKING_NOTIFIER_HEAD(network_throughput_notifier);
-static struct pm_qos_object network_throughput_pm_qos = {
- .requirements =
- {LIST_HEAD_INIT(network_throughput_pm_qos.requirements.list)},
- .notifiers = &network_throughput_notifier,
- .name = "network_throughput",
- .default_value = 0,
- .target_value = 0,
- .comparitor = max_compare
-};
-
-static BLOCKING_NOTIFIER_HEAD(system_bus_freq_notifier);
-static struct pm_qos_object system_bus_freq_pm_qos = {
- .requirements =
- {LIST_HEAD_INIT(system_bus_freq_pm_qos.requirements.list)},
- .notifiers = &system_bus_freq_notifier,
- .name = "system_bus_freq",
- .default_value = 0,
- .target_value = 0,
- .comparitor = max_compare
-};
-
-
-static struct pm_qos_object *pm_qos_array[] = {
- [PM_QOS_RESERVED] = &null_pm_qos,
- [PM_QOS_CPU_DMA_LATENCY] = &cpu_dma_pm_qos,
- [PM_QOS_NETWORK_LATENCY] = &network_lat_pm_qos,
- [PM_QOS_NETWORK_THROUGHPUT] = &network_throughput_pm_qos,
- [PM_QOS_SYSTEM_BUS_FREQ] = &system_bus_freq_pm_qos,
-};
-
-static DEFINE_SPINLOCK(pm_qos_lock);
-
-static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
- size_t count, loff_t *f_pos);
-static int pm_qos_power_open(struct inode *inode, struct file *filp);
-static int pm_qos_power_release(struct inode *inode, struct file *filp);
-
-static const struct file_operations pm_qos_power_fops = {
- .write = pm_qos_power_write,
- .open = pm_qos_power_open,
- .release = pm_qos_power_release,
-};
-
-/* static helper functions */
-static s32 max_compare(s32 v1, s32 v2)
-{
- return max(v1, v2);
-}
-
-static s32 min_compare(s32 v1, s32 v2)
-{
- return min(v1, v2);
-}
-
-static void update_target(int target)
-{
- s32 extreme_value;
- struct requirement_list *node;
- unsigned long flags;
- int call_notifier = 0;
-
- spin_lock_irqsave(&pm_qos_lock, flags);
- extreme_value = pm_qos_array[target]->default_value;
- list_for_each_entry(node,
- &pm_qos_array[target]->requirements.list, list) {
- extreme_value = pm_qos_array[target]->comparitor(
- extreme_value, node->value);
- }
- if (pm_qos_array[target]->target_value != extreme_value) {
- call_notifier = 1;
- pm_qos_array[target]->target_value = extreme_value;
- pr_debug(KERN_ERR "new target for qos %d is %d\n", target,
- pm_qos_array[target]->target_value);
- }
- spin_unlock_irqrestore(&pm_qos_lock, flags);
-
- if (call_notifier)
- blocking_notifier_call_chain(pm_qos_array[target]->notifiers,
- (unsigned long) extreme_value, NULL);
-}
-
-static int register_pm_qos_misc(struct pm_qos_object *qos)
-{
- qos->pm_qos_power_miscdev.minor = MISC_DYNAMIC_MINOR;
- qos->pm_qos_power_miscdev.name = qos->name;
- qos->pm_qos_power_miscdev.fops = &pm_qos_power_fops;
-
- return misc_register(&qos->pm_qos_power_miscdev);
-}
-
-static int find_pm_qos_object_by_minor(int minor)
-{
- int pm_qos_class;
-
- for (pm_qos_class = 0;
- pm_qos_class < PM_QOS_NUM_CLASSES; pm_qos_class++) {
- if (minor ==
- pm_qos_array[pm_qos_class]->pm_qos_power_miscdev.minor)
- return pm_qos_class;
- }
- return -1;
-}
-
-/**
- * pm_qos_requirement - returns current system wide qos expectation
- * @pm_qos_class: identification of which qos value is requested
- *
- * This function returns the current target value in an atomic manner.
- */
-int pm_qos_requirement(int pm_qos_class)
-{
- int ret_val;
- unsigned long flags;
-
- spin_lock_irqsave(&pm_qos_lock, flags);
- ret_val = pm_qos_array[pm_qos_class]->target_value;
- spin_unlock_irqrestore(&pm_qos_lock, flags);
-
- return ret_val;
-}
-EXPORT_SYMBOL_GPL(pm_qos_requirement);
-
-/**
- * pm_qos_add_requirement - inserts new qos request into the list
- * @pm_qos_class: identifies which list of qos request to us
- * @name: identifies the request
- * @value: defines the qos request
- *
- * This function inserts a new entry in the pm_qos_class list of requested qos
- * performance charactoistics. It recomputes the agregate QoS expectations for
- * the pm_qos_class of parrameters.
- */
-int pm_qos_add_requirement(int pm_qos_class, char *name, s32 value)
-{
- struct requirement_list *dep;
- unsigned long flags;
-
- dep = kzalloc(sizeof(struct requirement_list), GFP_KERNEL);
- if (dep) {
- if (value == PM_QOS_DEFAULT_VALUE)
- dep->value = pm_qos_array[pm_qos_class]->default_value;
- else
- dep->value = value;
- dep->name = kstrdup(name, GFP_KERNEL);
- if (!dep->name)
- goto cleanup;
-
- spin_lock_irqsave(&pm_qos_lock, flags);
- list_add(&dep->list,
- &pm_qos_array[pm_qos_class]->requirements.list);
- spin_unlock_irqrestore(&pm_qos_lock, flags);
- update_target(pm_qos_class);
-
- return 0;
- }
-
-cleanup:
- kfree(dep);
- return -ENOMEM;
-}
-EXPORT_SYMBOL_GPL(pm_qos_add_requirement);
-
-/**
- * pm_qos_update_requirement - modifies an existing qos request
- * @pm_qos_class: identifies which list of qos request to us
- * @name: identifies the request
- * @value: defines the qos request
- *
- * Updates an existing qos requierement for the pm_qos_class of parameters along
- * with updating the target pm_qos_class value.
- *
- * If the named request isn't in the lest then no change is made.
- */
-int pm_qos_update_requirement(int pm_qos_class, char *name, s32 new_value)
-{
- unsigned long flags;
- struct requirement_list *node;
- int pending_update = 0;
-
- spin_lock_irqsave(&pm_qos_lock, flags);
- list_for_each_entry(node,
- &pm_qos_array[pm_qos_class]->requirements.list, list) {
- if (strcmp(node->name, name) == 0) {
- if (new_value == PM_QOS_DEFAULT_VALUE)
- node->value =
- pm_qos_array[pm_qos_class]->default_value;
- else
- node->value = new_value;
- pending_update = 1;
- break;
- }
- }
- spin_unlock_irqrestore(&pm_qos_lock, flags);
- if (pending_update)
- update_target(pm_qos_class);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(pm_qos_update_requirement);
-
-/**
- * pm_qos_remove_requirement - modifies an existing qos request
- * @pm_qos_class: identifies which list of qos request to us
- * @name: identifies the request
- *
- * Will remove named qos request from pm_qos_class list of parrameters and
- * recompute the current target value for the pm_qos_class.
- */
-void pm_qos_remove_requirement(int pm_qos_class, char *name)
-{
- unsigned long flags;
- struct requirement_list *node;
- int pending_update = 0;
-
- spin_lock_irqsave(&pm_qos_lock, flags);
- list_for_each_entry(node,
- &pm_qos_array[pm_qos_class]->requirements.list, list) {
- if (strcmp(node->name, name) == 0) {
- kfree(node->name);
- list_del(&node->list);
- kfree(node);
- pending_update = 1;
- break;
- }
- }
- spin_unlock_irqrestore(&pm_qos_lock, flags);
- if (pending_update)
- update_target(pm_qos_class);
-}
-EXPORT_SYMBOL_GPL(pm_qos_remove_requirement);
-
-/**
- * pm_qos_add_notifier - sets notification entry for changes to target value
- * @pm_qos_class: identifies which qos target changes should be notified.
- * @notifier: notifier block managed by caller.
- *
- * will register the notifier into a notification chain that gets called
- * uppon changes to the pm_qos_class target value.
- */
- int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier)
-{
- int retval;
-
- retval = blocking_notifier_chain_register(
- pm_qos_array[pm_qos_class]->notifiers, notifier);
-
- return retval;
-}
-EXPORT_SYMBOL_GPL(pm_qos_add_notifier);
-
-/**
- * pm_qos_remove_notifier - deletes notification entry from chain.
- * @pm_qos_class: identifies which qos target changes are notified.
- * @notifier: notifier block to be removed.
- *
- * will remove the notifier from the notification chain that gets called
- * uppon changes to the pm_qos_class target value.
- */
-int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
-{
- int retval;
-
- retval = blocking_notifier_chain_unregister(
- pm_qos_array[pm_qos_class]->notifiers, notifier);
-
- return retval;
-}
-EXPORT_SYMBOL_GPL(pm_qos_remove_notifier);
-
-#define PID_NAME_LEN sizeof("process_1234567890")
-static char name[PID_NAME_LEN];
-
-static int pm_qos_power_open(struct inode *inode, struct file *filp)
-{
- int ret;
- long pm_qos_class;
-
- pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
- if (pm_qos_class >= 0) {
- filp->private_data = (void *)pm_qos_class;
- sprintf(name, "process_%d", current->pid);
- ret = pm_qos_add_requirement(pm_qos_class, name,
- PM_QOS_DEFAULT_VALUE);
- if (ret >= 0)
- return 0;
- }
-
- return -EPERM;
-}
-
-static int pm_qos_power_release(struct inode *inode, struct file *filp)
-{
- int pm_qos_class;
-
- pm_qos_class = (long)filp->private_data;
- sprintf(name, "process_%d", current->pid);
- pm_qos_remove_requirement(pm_qos_class, name);
-
- return 0;
-}
-
-static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
- size_t count, loff_t *f_pos)
-{
- s32 value;
- int pm_qos_class;
-
- pm_qos_class = (long)filp->private_data;
- if (count != sizeof(s32))
- return -EINVAL;
- if (copy_from_user(&value, buf, sizeof(s32)))
- return -EFAULT;
- sprintf(name, "process_%d", current->pid);
- pm_qos_update_requirement(pm_qos_class, name, value);
-
- return sizeof(s32);
-}
-
-/*
- * This initializes pm-qos for older kernels.
- */
-int compat_pm_qos_power_init(void)
-{
- int ret = 0;
-
- ret = register_pm_qos_misc(&cpu_dma_pm_qos);
- if (ret < 0) {
- printk(KERN_ERR "pm_qos_param: cpu_dma_latency setup failed\n");
- return ret;
- }
- ret = register_pm_qos_misc(&network_lat_pm_qos);
- if (ret < 0) {
- printk(KERN_ERR "pm_qos_param: network_latency setup failed\n");
- return ret;
- }
- ret = register_pm_qos_misc(&network_throughput_pm_qos);
- if (ret < 0) {
- printk(KERN_ERR
- "pm_qos_param: network_throughput setup failed\n");
- return ret;
- }
- ret = register_pm_qos_misc(&system_bus_freq_pm_qos);
- if (ret < 0) {
- printk(KERN_ERR
- "pm_qos_param: network_throughput setup failed\n");
- return ret;
- }
-
- return ret;
-}
-
/**
* The following things are out of ./lib/vsprintf.c
* The new iwlwifi driver is using them.
--- /dev/null
+#include <net/compat.h>
+
+/* All things not in 2.6.22, 2.6.23 and 2.6.24 */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
+
+#include <linux/miscdevice.h>
+
+/*
+ * Backport work for QoS dependencies (kernel/pm_qos_params.c)
+ * pm-qos stuff written by mark gross mgross@linux.intel.com.
+ *
+ * ipw2100 now makes use of
+ * pm_qos_add_requirement(),
+ * pm_qos_update_requirement() and
+ * pm_qos_remove_requirement() from it
+ *
+ * mac80211 uses the network latency to determine if to enable or not
+ * dynamic PS. mac80211 also and registers a notifier for when
+ * the latency changes. Since older kernels do no thave pm-qos stuff
+ * we just implement it completley here and register it upon cfg80211
+ * init. I haven't tested ipw2100 on 2.6.24 though.
+ *
+ * This is copied from the kernel written by mark gross mgross@linux.intel.com
+ */
+
+/*
+ * locking rule: all changes to target_value or requirements or notifiers lists
+ * or pm_qos_object list and pm_qos_objects need to happen with pm_qos_lock
+ * held, taken with _irqsave. One lock to rule them all
+ */
+struct requirement_list {
+ struct list_head list;
+ union {
+ s32 value;
+ s32 usec;
+ s32 kbps;
+ };
+ char *name;
+};
+
+static s32 max_compare(s32 v1, s32 v2);
+static s32 min_compare(s32 v1, s32 v2);
+
+struct pm_qos_object {
+ struct requirement_list requirements;
+ struct blocking_notifier_head *notifiers;
+ struct miscdevice pm_qos_power_miscdev;
+ char *name;
+ s32 default_value;
+ s32 target_value;
+ s32 (*comparitor)(s32, s32);
+};
+
+static struct pm_qos_object null_pm_qos;
+static BLOCKING_NOTIFIER_HEAD(cpu_dma_lat_notifier);
+static struct pm_qos_object cpu_dma_pm_qos = {
+ .requirements = {LIST_HEAD_INIT(cpu_dma_pm_qos.requirements.list)},
+ .notifiers = &cpu_dma_lat_notifier,
+ .name = "cpu_dma_latency",
+ .default_value = 2000 * USEC_PER_SEC,
+ .target_value = 2000 * USEC_PER_SEC,
+ .comparitor = min_compare
+};
+
+static BLOCKING_NOTIFIER_HEAD(network_lat_notifier);
+static struct pm_qos_object network_lat_pm_qos = {
+ .requirements = {LIST_HEAD_INIT(network_lat_pm_qos.requirements.list)},
+ .notifiers = &network_lat_notifier,
+ .name = "network_latency",
+ .default_value = 2000 * USEC_PER_SEC,
+ .target_value = 2000 * USEC_PER_SEC,
+ .comparitor = min_compare
+};
+
+
+static BLOCKING_NOTIFIER_HEAD(network_throughput_notifier);
+static struct pm_qos_object network_throughput_pm_qos = {
+ .requirements =
+ {LIST_HEAD_INIT(network_throughput_pm_qos.requirements.list)},
+ .notifiers = &network_throughput_notifier,
+ .name = "network_throughput",
+ .default_value = 0,
+ .target_value = 0,
+ .comparitor = max_compare
+};
+
+static BLOCKING_NOTIFIER_HEAD(system_bus_freq_notifier);
+static struct pm_qos_object system_bus_freq_pm_qos = {
+ .requirements =
+ {LIST_HEAD_INIT(system_bus_freq_pm_qos.requirements.list)},
+ .notifiers = &system_bus_freq_notifier,
+ .name = "system_bus_freq",
+ .default_value = 0,
+ .target_value = 0,
+ .comparitor = max_compare
+};
+
+
+static struct pm_qos_object *pm_qos_array[] = {
+ [PM_QOS_RESERVED] = &null_pm_qos,
+ [PM_QOS_CPU_DMA_LATENCY] = &cpu_dma_pm_qos,
+ [PM_QOS_NETWORK_LATENCY] = &network_lat_pm_qos,
+ [PM_QOS_NETWORK_THROUGHPUT] = &network_throughput_pm_qos,
+ [PM_QOS_SYSTEM_BUS_FREQ] = &system_bus_freq_pm_qos,
+};
+
+static DEFINE_SPINLOCK(pm_qos_lock);
+
+static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *f_pos);
+static int pm_qos_power_open(struct inode *inode, struct file *filp);
+static int pm_qos_power_release(struct inode *inode, struct file *filp);
+
+static const struct file_operations pm_qos_power_fops = {
+ .write = pm_qos_power_write,
+ .open = pm_qos_power_open,
+ .release = pm_qos_power_release,
+};
+
+/* static helper functions */
+static s32 max_compare(s32 v1, s32 v2)
+{
+ return max(v1, v2);
+}
+
+static s32 min_compare(s32 v1, s32 v2)
+{
+ return min(v1, v2);
+}
+
+static void update_target(int target)
+{
+ s32 extreme_value;
+ struct requirement_list *node;
+ unsigned long flags;
+ int call_notifier = 0;
+
+ spin_lock_irqsave(&pm_qos_lock, flags);
+ extreme_value = pm_qos_array[target]->default_value;
+ list_for_each_entry(node,
+ &pm_qos_array[target]->requirements.list, list) {
+ extreme_value = pm_qos_array[target]->comparitor(
+ extreme_value, node->value);
+ }
+ if (pm_qos_array[target]->target_value != extreme_value) {
+ call_notifier = 1;
+ pm_qos_array[target]->target_value = extreme_value;
+ pr_debug(KERN_ERR "new target for qos %d is %d\n", target,
+ pm_qos_array[target]->target_value);
+ }
+ spin_unlock_irqrestore(&pm_qos_lock, flags);
+
+ if (call_notifier)
+ blocking_notifier_call_chain(pm_qos_array[target]->notifiers,
+ (unsigned long) extreme_value, NULL);
+}
+
+static int register_pm_qos_misc(struct pm_qos_object *qos)
+{
+ qos->pm_qos_power_miscdev.minor = MISC_DYNAMIC_MINOR;
+ qos->pm_qos_power_miscdev.name = qos->name;
+ qos->pm_qos_power_miscdev.fops = &pm_qos_power_fops;
+
+ return misc_register(&qos->pm_qos_power_miscdev);
+}
+
+static int find_pm_qos_object_by_minor(int minor)
+{
+ int pm_qos_class;
+
+ for (pm_qos_class = 0;
+ pm_qos_class < PM_QOS_NUM_CLASSES; pm_qos_class++) {
+ if (minor ==
+ pm_qos_array[pm_qos_class]->pm_qos_power_miscdev.minor)
+ return pm_qos_class;
+ }
+ return -1;
+}
+
+/**
+ * pm_qos_requirement - returns current system wide qos expectation
+ * @pm_qos_class: identification of which qos value is requested
+ *
+ * This function returns the current target value in an atomic manner.
+ */
+int pm_qos_requirement(int pm_qos_class)
+{
+ int ret_val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pm_qos_lock, flags);
+ ret_val = pm_qos_array[pm_qos_class]->target_value;
+ spin_unlock_irqrestore(&pm_qos_lock, flags);
+
+ return ret_val;
+}
+EXPORT_SYMBOL_GPL(pm_qos_requirement);
+
+/**
+ * pm_qos_add_requirement - inserts new qos request into the list
+ * @pm_qos_class: identifies which list of qos request to us
+ * @name: identifies the request
+ * @value: defines the qos request
+ *
+ * This function inserts a new entry in the pm_qos_class list of requested qos
+ * performance charactoistics. It recomputes the agregate QoS expectations for
+ * the pm_qos_class of parrameters.
+ */
+int pm_qos_add_requirement(int pm_qos_class, char *name, s32 value)
+{
+ struct requirement_list *dep;
+ unsigned long flags;
+
+ dep = kzalloc(sizeof(struct requirement_list), GFP_KERNEL);
+ if (dep) {
+ if (value == PM_QOS_DEFAULT_VALUE)
+ dep->value = pm_qos_array[pm_qos_class]->default_value;
+ else
+ dep->value = value;
+ dep->name = kstrdup(name, GFP_KERNEL);
+ if (!dep->name)
+ goto cleanup;
+
+ spin_lock_irqsave(&pm_qos_lock, flags);
+ list_add(&dep->list,
+ &pm_qos_array[pm_qos_class]->requirements.list);
+ spin_unlock_irqrestore(&pm_qos_lock, flags);
+ update_target(pm_qos_class);
+
+ return 0;
+ }
+
+cleanup:
+ kfree(dep);
+ return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(pm_qos_add_requirement);
+
+/**
+ * pm_qos_update_requirement - modifies an existing qos request
+ * @pm_qos_class: identifies which list of qos request to us
+ * @name: identifies the request
+ * @value: defines the qos request
+ *
+ * Updates an existing qos requierement for the pm_qos_class of parameters along
+ * with updating the target pm_qos_class value.
+ *
+ * If the named request isn't in the lest then no change is made.
+ */
+int pm_qos_update_requirement(int pm_qos_class, char *name, s32 new_value)
+{
+ unsigned long flags;
+ struct requirement_list *node;
+ int pending_update = 0;
+
+ spin_lock_irqsave(&pm_qos_lock, flags);
+ list_for_each_entry(node,
+ &pm_qos_array[pm_qos_class]->requirements.list, list) {
+ if (strcmp(node->name, name) == 0) {
+ if (new_value == PM_QOS_DEFAULT_VALUE)
+ node->value =
+ pm_qos_array[pm_qos_class]->default_value;
+ else
+ node->value = new_value;
+ pending_update = 1;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&pm_qos_lock, flags);
+ if (pending_update)
+ update_target(pm_qos_class);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pm_qos_update_requirement);
+
+/**
+ * pm_qos_remove_requirement - modifies an existing qos request
+ * @pm_qos_class: identifies which list of qos request to us
+ * @name: identifies the request
+ *
+ * Will remove named qos request from pm_qos_class list of parrameters and
+ * recompute the current target value for the pm_qos_class.
+ */
+void pm_qos_remove_requirement(int pm_qos_class, char *name)
+{
+ unsigned long flags;
+ struct requirement_list *node;
+ int pending_update = 0;
+
+ spin_lock_irqsave(&pm_qos_lock, flags);
+ list_for_each_entry(node,
+ &pm_qos_array[pm_qos_class]->requirements.list, list) {
+ if (strcmp(node->name, name) == 0) {
+ kfree(node->name);
+ list_del(&node->list);
+ kfree(node);
+ pending_update = 1;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&pm_qos_lock, flags);
+ if (pending_update)
+ update_target(pm_qos_class);
+}
+EXPORT_SYMBOL_GPL(pm_qos_remove_requirement);
+
+/**
+ * pm_qos_add_notifier - sets notification entry for changes to target value
+ * @pm_qos_class: identifies which qos target changes should be notified.
+ * @notifier: notifier block managed by caller.
+ *
+ * will register the notifier into a notification chain that gets called
+ * uppon changes to the pm_qos_class target value.
+ */
+ int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier)
+{
+ int retval;
+
+ retval = blocking_notifier_chain_register(
+ pm_qos_array[pm_qos_class]->notifiers, notifier);
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(pm_qos_add_notifier);
+
+/**
+ * pm_qos_remove_notifier - deletes notification entry from chain.
+ * @pm_qos_class: identifies which qos target changes are notified.
+ * @notifier: notifier block to be removed.
+ *
+ * will remove the notifier from the notification chain that gets called
+ * uppon changes to the pm_qos_class target value.
+ */
+int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
+{
+ int retval;
+
+ retval = blocking_notifier_chain_unregister(
+ pm_qos_array[pm_qos_class]->notifiers, notifier);
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(pm_qos_remove_notifier);
+
+#define PID_NAME_LEN sizeof("process_1234567890")
+static char name[PID_NAME_LEN];
+
+static int pm_qos_power_open(struct inode *inode, struct file *filp)
+{
+ int ret;
+ long pm_qos_class;
+
+ pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
+ if (pm_qos_class >= 0) {
+ filp->private_data = (void *)pm_qos_class;
+ sprintf(name, "process_%d", current->pid);
+ ret = pm_qos_add_requirement(pm_qos_class, name,
+ PM_QOS_DEFAULT_VALUE);
+ if (ret >= 0)
+ return 0;
+ }
+
+ return -EPERM;
+}
+
+static int pm_qos_power_release(struct inode *inode, struct file *filp)
+{
+ int pm_qos_class;
+
+ pm_qos_class = (long)filp->private_data;
+ sprintf(name, "process_%d", current->pid);
+ pm_qos_remove_requirement(pm_qos_class, name);
+
+ return 0;
+}
+
+static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ s32 value;
+ int pm_qos_class;
+
+ pm_qos_class = (long)filp->private_data;
+ if (count != sizeof(s32))
+ return -EINVAL;
+ if (copy_from_user(&value, buf, sizeof(s32)))
+ return -EFAULT;
+ sprintf(name, "process_%d", current->pid);
+ pm_qos_update_requirement(pm_qos_class, name, value);
+
+ return sizeof(s32);
+}
+
+/*
+ * This initializes pm-qos for older kernels.
+ */
+int compat_pm_qos_power_init(void)
+{
+ int ret = 0;
+
+ ret = register_pm_qos_misc(&cpu_dma_pm_qos);
+ if (ret < 0) {
+ printk(KERN_ERR "pm_qos_param: cpu_dma_latency setup failed\n");
+ return ret;
+ }
+ ret = register_pm_qos_misc(&network_lat_pm_qos);
+ if (ret < 0) {
+ printk(KERN_ERR "pm_qos_param: network_latency setup failed\n");
+ return ret;
+ }
+ ret = register_pm_qos_misc(&network_throughput_pm_qos);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "pm_qos_param: network_throughput setup failed\n");
+ return ret;
+ }
+ ret = register_pm_qos_misc(&system_bus_freq_pm_qos);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "pm_qos_param: network_throughput setup failed\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25) */
projects / ~emulex / compat.git / commitdiff