Added missing tegra files.HEADmaster

24 files changed, 20433 insertions, 0 deletions

diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c
new file mode 100644
index 00000000000..82da7ac3b1f
--- /dev/null
+++ b/kernel/pm_qos_params.c
@@ -0,0 +1,526 @@
+/*
+ * This module exposes the interface to kernel space for specifying
+ * QoS dependencies.  It provides infrastructure for registration of:
+ *
+ * Dependents on a QoS value : register requests
+ * Watchers of QoS value : get notified when target QoS value changes
+ *
+ * This QoS design is best effort based.  Dependents register their QoS needs.
+ * Watchers register to keep track of the current QoS needs of the system.
+ *
+ * There are 3 basic classes of QoS parameter: latency, timeout, throughput
+ * each have defined units:
+ * latency: usec
+ * timeout: usec <-- currently not used.
+ * throughput: kbs (kilo byte / sec)
+ *
+ * There are lists of pm_qos_objects each one wrapping requests, notifiers
+ *
+ * User mode requests on a QOS parameter register themselves to the
+ * subsystem by opening the device node /dev/... and writing there request to
+ * the node.  As long as the process holds a file handle open to the node the
+ * client continues to be accounted for.  Upon file release the usermode
+ * request is removed and a new qos target is computed.  This way when the
+ * request that the application has is cleaned up when closes the file
+ * pointer or exits the pm_qos_object will get an opportunity to clean up.
+ *
+ * Mark Gross <mgross@linux.intel.com>
+ */
+
+/*#define DEBUG*/
+
+#include <linux/pm_qos_params.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+#include <linux/string.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <linux/uaccess.h>
+
+/*
+ * locking rule: all changes to requests 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
+ */
+enum pm_qos_type {
+        PM_QOS_MAX,             /* return the largest value */
+        PM_QOS_MIN              /* return the smallest value */
+};
+
+/*
+ * Note: The lockless read path depends on the CPU accessing
+ * target_value atomically.  Atomic access is only guaranteed on all CPU
+ * types linux supports for 32 bit quantites
+ */
+struct pm_qos_object {
+        struct plist_head requests;
+        struct blocking_notifier_head *notifiers;
+        struct miscdevice pm_qos_power_miscdev;
+        char *name;
+        s32 target_value;       /* Do not change to 64 bit */
+        s32 default_value;
+        enum pm_qos_type type;
+};
+
+static DEFINE_SPINLOCK(pm_qos_lock);
+
+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 = {
+        .requests = PLIST_HEAD_INIT(cpu_dma_pm_qos.requests),
+        .notifiers = &cpu_dma_lat_notifier,
+        .name = "cpu_dma_latency",
+        .target_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
+        .default_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
+        .type = PM_QOS_MIN,
+};
+
+static BLOCKING_NOTIFIER_HEAD(network_lat_notifier);
+static struct pm_qos_object network_lat_pm_qos = {
+        .requests = PLIST_HEAD_INIT(network_lat_pm_qos.requests),
+        .notifiers = &network_lat_notifier,
+        .name = "network_latency",
+        .target_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
+        .default_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
+        .type = PM_QOS_MIN
+};
+
+
+static BLOCKING_NOTIFIER_HEAD(network_throughput_notifier);
+static struct pm_qos_object network_throughput_pm_qos = {
+        .requests = PLIST_HEAD_INIT(network_throughput_pm_qos.requests),
+        .notifiers = &network_throughput_notifier,
+        .name = "network_throughput",
+        .target_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
+        .default_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
+        .type = PM_QOS_MAX,
+};
+
+
+static BLOCKING_NOTIFIER_HEAD(min_online_cpus_notifier);
+static struct pm_qos_object min_online_cpus_pm_qos = {
+        .requests = PLIST_HEAD_INIT(min_online_cpus_pm_qos.requests),
+        .notifiers = &min_online_cpus_notifier,
+        .name = "min_online_cpus",
+        .target_value = PM_QOS_MIN_ONLINE_CPUS_DEFAULT_VALUE,
+        .default_value = PM_QOS_MIN_ONLINE_CPUS_DEFAULT_VALUE,
+        .type = PM_QOS_MAX,
+};
+
+
+static BLOCKING_NOTIFIER_HEAD(max_online_cpus_notifier);
+static struct pm_qos_object max_online_cpus_pm_qos = {
+        .requests = PLIST_HEAD_INIT(max_online_cpus_pm_qos.requests),
+        .notifiers = &max_online_cpus_notifier,
+        .name = "max_online_cpus",
+        .target_value = PM_QOS_MAX_ONLINE_CPUS_DEFAULT_VALUE,
+        .default_value = PM_QOS_MAX_ONLINE_CPUS_DEFAULT_VALUE,
+        .type = PM_QOS_MIN,
+};
+
+
+static BLOCKING_NOTIFIER_HEAD(cpu_freq_min_notifier);
+static struct pm_qos_object cpu_freq_min_pm_qos = {
+        .requests = PLIST_HEAD_INIT(cpu_freq_min_pm_qos.requests),
+        .notifiers = &cpu_freq_min_notifier,
+        .name = "cpu_freq_min",
+        .target_value = PM_QOS_CPU_FREQ_MIN_DEFAULT_VALUE,
+        .default_value = PM_QOS_CPU_FREQ_MIN_DEFAULT_VALUE,
+        .type = PM_QOS_MAX,
+};
+
+
+static BLOCKING_NOTIFIER_HEAD(cpu_freq_max_notifier);
+static struct pm_qos_object cpu_freq_max_pm_qos = {
+        .requests = PLIST_HEAD_INIT(cpu_freq_max_pm_qos.requests),
+        .notifiers = &cpu_freq_max_notifier,
+        .name = "cpu_freq_max",
+        .target_value = PM_QOS_CPU_FREQ_MAX_DEFAULT_VALUE,
+        .default_value = PM_QOS_CPU_FREQ_MAX_DEFAULT_VALUE,
+        .type = PM_QOS_MIN,
+};
+
+
+static struct pm_qos_object *pm_qos_array[] = {
+        &null_pm_qos,
+        &cpu_dma_pm_qos,
+        &network_lat_pm_qos,
+        &network_throughput_pm_qos,
+        &min_online_cpus_pm_qos,
+        &max_online_cpus_pm_qos,
+        &cpu_freq_min_pm_qos,
+        &cpu_freq_max_pm_qos
+};
+
+static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
+                size_t count, loff_t *f_pos);
+static ssize_t pm_qos_power_read(struct file *filp, 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,
+        .read = pm_qos_power_read,
+        .open = pm_qos_power_open,
+        .release = pm_qos_power_release,
+        .llseek = noop_llseek,
+};
+
+/* unlocked internal variant */
+static inline int pm_qos_get_value(struct pm_qos_object *o)
+{
+        if (plist_head_empty(&o->requests))
+                return o->default_value;
+
+        switch (o->type) {
+        case PM_QOS_MIN: